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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 Tarreau18bf01e2014-06-13 16:18:52 +020038#include <types/capture.h>
Willy Tarreau9650f372009-08-16 14:02:45 +020039#include <types/server.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010040
41#include <proto/acl.h>
Willy Tarreau9fcb9842012-04-20 14:45:49 +020042#include <proto/arg.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020043#include <proto/channel.h>
Willy Tarreaud2274c62012-07-06 14:29:45 +020044#include <proto/connection.h>
Willy Tarreaudd2f85e2012-09-02 22:34:23 +020045#include <proto/fd.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020046#include <proto/listener.h>
Willy Tarreau9650f372009-08-16 14:02:45 +020047#include <proto/log.h>
48#include <proto/port_range.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020049#include <proto/protocol.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010050#include <proto/proto_tcp.h>
Willy Tarreaub6866442008-07-14 23:54:42 +020051#include <proto/proxy.h>
Willy Tarreaucd3b0942012-04-27 21:52:18 +020052#include <proto/sample.h>
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +020053#include <proto/session.h>
Willy Tarreaua975b8f2010-06-05 19:13:27 +020054#include <proto/stick_table.h>
Willy Tarreaucc1e04b2013-09-11 23:20:29 +020055#include <proto/stream_interface.h>
Willy Tarreaua975b8f2010-06-05 19:13:27 +020056#include <proto/task.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010057
Willy Tarreaue8c66af2008-01-13 18:40:14 +010058#ifdef CONFIG_HAP_CTTPROXY
59#include <import/ip_tproxy.h>
60#endif
61
Emeric Bruncf20bf12010-10-22 16:06:11 +020062static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen);
63static int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen);
Willy Tarreaue6b98942007-10-29 01:09:36 +010064
65/* Note: must not be declared <const> as its list will be overwritten */
66static struct protocol proto_tcpv4 = {
67 .name = "tcpv4",
68 .sock_domain = AF_INET,
69 .sock_type = SOCK_STREAM,
70 .sock_prot = IPPROTO_TCP,
71 .sock_family = AF_INET,
72 .sock_addrlen = sizeof(struct sockaddr_in),
73 .l3_addrlen = 32/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +020074 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +020075 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +020076 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010077 .bind_all = tcp_bind_listeners,
78 .unbind_all = unbind_all_listeners,
79 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +020080 .get_src = tcp_get_src,
81 .get_dst = tcp_get_dst,
Willy Tarreau2b57cb82013-06-10 19:56:38 +020082 .drain = tcp_drain,
Willy Tarreaud903bb32014-07-07 20:22:12 +020083 .pause = tcp_pause_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010084 .listeners = LIST_HEAD_INIT(proto_tcpv4.listeners),
85 .nb_listeners = 0,
86};
87
88/* Note: must not be declared <const> as its list will be overwritten */
89static struct protocol proto_tcpv6 = {
90 .name = "tcpv6",
91 .sock_domain = AF_INET6,
92 .sock_type = SOCK_STREAM,
93 .sock_prot = IPPROTO_TCP,
94 .sock_family = AF_INET6,
95 .sock_addrlen = sizeof(struct sockaddr_in6),
96 .l3_addrlen = 128/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +020097 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +020098 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +020099 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100100 .bind_all = tcp_bind_listeners,
101 .unbind_all = unbind_all_listeners,
102 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +0200103 .get_src = tcp_get_src,
104 .get_dst = tcp_get_dst,
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200105 .drain = tcp_drain,
Willy Tarreaud903bb32014-07-07 20:22:12 +0200106 .pause = tcp_pause_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100107 .listeners = LIST_HEAD_INIT(proto_tcpv6.listeners),
108 .nb_listeners = 0,
109};
110
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100111
David du Colombier6f5ccb12011-03-10 22:26:24 +0100112/* Binds ipv4/ipv6 address <local> to socket <fd>, unless <flags> is set, in which
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100113 * case we try to bind <remote>. <flags> is a 2-bit field consisting of :
114 * - 0 : ignore remote address (may even be a NULL pointer)
115 * - 1 : use provided address
116 * - 2 : use provided port
117 * - 3 : use both
118 *
119 * The function supports multiple foreign binding methods :
120 * - linux_tproxy: we directly bind to the foreign address
121 * - cttproxy: we bind to a local address then nat.
122 * The second one can be used as a fallback for the first one.
123 * This function returns 0 when everything's OK, 1 if it could not bind, to the
124 * local address, 2 if it could not bind to the foreign address.
125 */
David du Colombier6f5ccb12011-03-10 22:26:24 +0100126int tcp_bind_socket(int fd, int flags, struct sockaddr_storage *local, struct sockaddr_storage *remote)
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100127{
David du Colombier6f5ccb12011-03-10 22:26:24 +0100128 struct sockaddr_storage bind_addr;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100129 int foreign_ok = 0;
130 int ret;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100131 static int ip_transp_working = 1;
David du Colombier65c17962012-07-13 14:34:59 +0200132 static int ip6_transp_working = 1;
Pieter Baauwd551fb52013-05-08 22:49:23 +0200133
David du Colombier65c17962012-07-13 14:34:59 +0200134 switch (local->ss_family) {
135 case AF_INET:
136 if (flags && ip_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200137 /* This deserves some explanation. Some platforms will support
138 * multiple combinations of certain methods, so we try the
139 * supported ones until one succeeds.
140 */
141 if (0
142#if defined(IP_TRANSPARENT)
143 || (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == 0)
144#endif
145#if defined(IP_FREEBIND)
146 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
147#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200148#if defined(IP_BINDANY)
149 || (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == 0)
150#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200151#if defined(SO_BINDANY)
152 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
153#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200154 )
David du Colombier65c17962012-07-13 14:34:59 +0200155 foreign_ok = 1;
156 else
157 ip_transp_working = 0;
158 }
159 break;
160 case AF_INET6:
161 if (flags && ip6_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200162 if (0
163#if defined(IPV6_TRANSPARENT)
164 || (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == 0)
165#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100166#if defined(IP_FREEBIND)
167 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
168#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200169#if defined(IPV6_BINDANY)
170 || (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == 0)
171#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200172#if defined(SO_BINDANY)
173 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
174#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200175 )
David du Colombier65c17962012-07-13 14:34:59 +0200176 foreign_ok = 1;
177 else
178 ip6_transp_working = 0;
179 }
180 break;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100181 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200182
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100183 if (flags) {
184 memset(&bind_addr, 0, sizeof(bind_addr));
Willy Tarreau96dd0792011-04-19 07:20:57 +0200185 bind_addr.ss_family = remote->ss_family;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100186 switch (remote->ss_family) {
187 case AF_INET:
188 if (flags & 1)
189 ((struct sockaddr_in *)&bind_addr)->sin_addr = ((struct sockaddr_in *)remote)->sin_addr;
190 if (flags & 2)
191 ((struct sockaddr_in *)&bind_addr)->sin_port = ((struct sockaddr_in *)remote)->sin_port;
192 break;
193 case AF_INET6:
194 if (flags & 1)
195 ((struct sockaddr_in6 *)&bind_addr)->sin6_addr = ((struct sockaddr_in6 *)remote)->sin6_addr;
196 if (flags & 2)
197 ((struct sockaddr_in6 *)&bind_addr)->sin6_port = ((struct sockaddr_in6 *)remote)->sin6_port;
198 break;
Willy Tarreau5dc1e982011-12-16 21:25:11 +0100199 default:
200 /* we don't want to try to bind to an unknown address family */
201 foreign_ok = 0;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100202 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100203 }
204
Simon Hormande072bd2011-06-24 15:11:37 +0900205 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100206 if (foreign_ok) {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200207 if (is_inet_addr(&bind_addr)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200208 ret = bind(fd, (struct sockaddr *)&bind_addr, get_addr_len(&bind_addr));
209 if (ret < 0)
210 return 2;
211 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100212 }
213 else {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200214 if (is_inet_addr(local)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200215 ret = bind(fd, (struct sockaddr *)local, get_addr_len(local));
216 if (ret < 0)
217 return 1;
218 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100219 }
220
221 if (!flags)
222 return 0;
223
224#ifdef CONFIG_HAP_CTTPROXY
Willy Tarreau6f831b42011-03-20 14:03:54 +0100225 if (!foreign_ok && remote->ss_family == AF_INET) {
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100226 struct in_tproxy itp1, itp2;
227 memset(&itp1, 0, sizeof(itp1));
228
229 itp1.op = TPROXY_ASSIGN;
Willy Tarreau6f831b42011-03-20 14:03:54 +0100230 itp1.v.addr.faddr = ((struct sockaddr_in *)&bind_addr)->sin_addr;
231 itp1.v.addr.fport = ((struct sockaddr_in *)&bind_addr)->sin_port;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100232
233 /* set connect flag on socket */
234 itp2.op = TPROXY_FLAGS;
235 itp2.v.flags = ITP_CONNECT | ITP_ONCE;
236
237 if (setsockopt(fd, SOL_IP, IP_TPROXY, &itp1, sizeof(itp1)) != -1 &&
238 setsockopt(fd, SOL_IP, IP_TPROXY, &itp2, sizeof(itp2)) != -1) {
239 foreign_ok = 1;
240 }
241 }
242#endif
243 if (!foreign_ok)
244 /* we could not bind to a foreign address */
245 return 2;
246
247 return 0;
248}
Willy Tarreaue6b98942007-10-29 01:09:36 +0100249
Willy Tarreau9650f372009-08-16 14:02:45 +0200250
251/*
Willy Tarreau14f8e862012-08-30 22:23:13 +0200252 * This function initiates a TCP connection establishment to the target assigned
253 * to connection <conn> using (si->{target,addr.to}). A source address may be
254 * pointed to by conn->addr.from in case of transparent proxying. Normal source
255 * bind addresses are still determined locally (due to the possible need of a
256 * source port). conn->target may point either to a valid server or to a backend,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100257 * depending on conn->target. Only OBJ_TYPE_PROXY and OBJ_TYPE_SERVER are
Willy Tarreauf0837b22012-11-24 10:24:27 +0100258 * supported. The <data> parameter is a boolean indicating whether there are data
259 * waiting for being sent or not, in order to adjust data write polling and on
260 * some platforms, the ability to avoid an empty initial ACK. The <delack> argument
261 * allows the caller to force using a delayed ACK when establishing the connection :
262 * - 0 = no delayed ACK unless data are advertised and backend has tcp-smart-connect
263 * - 1 = delayed ACK if backend has tcp-smart-connect, regardless of data
264 * - 2 = delayed ACK regardless of backend options
Willy Tarreaub1d67742010-03-29 19:36:59 +0200265 *
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200266 * Note that a pending send_proxy message accounts for data.
267 *
Willy Tarreau9650f372009-08-16 14:02:45 +0200268 * It can return one of :
269 * - SN_ERR_NONE if everything's OK
270 * - SN_ERR_SRVTO if there are no more servers
271 * - SN_ERR_SRVCL if the connection was refused by the server
272 * - SN_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
273 * - SN_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
274 * - SN_ERR_INTERNAL for any other purely internal errors
275 * Additionnally, in the case of SN_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100276 *
277 * The connection's fd is inserted only when SN_ERR_NONE is returned, otherwise
278 * it's invalid and the caller has nothing to do.
Willy Tarreau9650f372009-08-16 14:02:45 +0200279 */
Willy Tarreauf1536862011-03-03 18:27:32 +0100280
Willy Tarreauf0837b22012-11-24 10:24:27 +0100281int tcp_connect_server(struct connection *conn, int data, int delack)
Willy Tarreau9650f372009-08-16 14:02:45 +0200282{
283 int fd;
Willy Tarreauac825402011-03-04 22:04:29 +0100284 struct server *srv;
285 struct proxy *be;
Willy Tarreaua4380b42012-12-08 22:49:11 +0100286 struct conn_src *src;
Willy Tarreauac825402011-03-04 22:04:29 +0100287
Willy Tarreau9ce70132014-01-24 16:08:19 +0100288 conn->flags = CO_FL_WAIT_L4_CONN; /* connection in progress */
289
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100290 switch (obj_type(conn->target)) {
291 case OBJ_TYPE_PROXY:
292 be = objt_proxy(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100293 srv = NULL;
294 break;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100295 case OBJ_TYPE_SERVER:
296 srv = objt_server(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100297 be = srv->proxy;
298 break;
299 default:
Willy Tarreau9ce70132014-01-24 16:08:19 +0100300 conn->flags |= CO_FL_ERROR;
Willy Tarreauac825402011-03-04 22:04:29 +0100301 return SN_ERR_INTERNAL;
302 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200303
Willy Tarreau986a9d22012-08-30 21:11:38 +0200304 if ((fd = conn->t.sock.fd = socket(conn->addr.to.ss_family, SOCK_STREAM, IPPROTO_TCP)) == -1) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200305 qfprintf(stderr, "Cannot get a server socket.\n");
306
Willy Tarreau9ce70132014-01-24 16:08:19 +0100307 if (errno == ENFILE) {
308 conn->err_code = CO_ER_SYS_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200309 send_log(be, LOG_EMERG,
310 "Proxy %s reached system FD limit at %d. Please check system tunables.\n",
311 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100312 }
313 else if (errno == EMFILE) {
314 conn->err_code = CO_ER_PROC_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200315 send_log(be, LOG_EMERG,
316 "Proxy %s reached process FD limit at %d. Please check 'ulimit-n' and restart.\n",
317 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100318 }
319 else if (errno == ENOBUFS || errno == ENOMEM) {
320 conn->err_code = CO_ER_SYS_MEMLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200321 send_log(be, LOG_EMERG,
322 "Proxy %s reached system memory limit at %d sockets. Please check system tunables.\n",
323 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100324 }
325 else if (errno == EAFNOSUPPORT || errno == EPROTONOSUPPORT) {
326 conn->err_code = CO_ER_NOPROTO;
327 }
328 else
329 conn->err_code = CO_ER_SOCK_ERR;
330
Willy Tarreau9650f372009-08-16 14:02:45 +0200331 /* this is a resource error */
Willy Tarreau9ce70132014-01-24 16:08:19 +0100332 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200333 return SN_ERR_RESOURCE;
334 }
335
336 if (fd >= global.maxsock) {
337 /* do not log anything there, it's a normal condition when this option
338 * is used to serialize connections to a server !
339 */
340 Alert("socket(): not enough free sockets. Raise -n argument. Giving up.\n");
341 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100342 conn->err_code = CO_ER_CONF_FDLIM;
343 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200344 return SN_ERR_PRXCOND; /* it is a configuration limit */
345 }
346
347 if ((fcntl(fd, F_SETFL, O_NONBLOCK)==-1) ||
Simon Hormande072bd2011-06-24 15:11:37 +0900348 (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one)) == -1)) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200349 qfprintf(stderr,"Cannot set client socket to non blocking mode.\n");
350 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100351 conn->err_code = CO_ER_SOCK_ERR;
352 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200353 return SN_ERR_INTERNAL;
354 }
355
356 if (be->options & PR_O_TCP_SRV_KA)
Simon Hormande072bd2011-06-24 15:11:37 +0900357 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one));
Willy Tarreau9650f372009-08-16 14:02:45 +0200358
Willy Tarreau9650f372009-08-16 14:02:45 +0200359 /* allow specific binding :
360 * - server-specific at first
361 * - proxy-specific next
362 */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100363 if (srv && srv->conn_src.opts & CO_SRC_BIND)
364 src = &srv->conn_src;
365 else if (be->conn_src.opts & CO_SRC_BIND)
366 src = &be->conn_src;
367 else
368 src = NULL;
369
370 if (src) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200371 int ret, flags = 0;
372
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200373 if (is_inet_addr(&conn->addr.from)) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100374 switch (src->opts & CO_SRC_TPROXY_MASK) {
Willy Tarreauef9a3602012-12-08 22:29:20 +0100375 case CO_SRC_TPROXY_ADDR:
376 case CO_SRC_TPROXY_CLI:
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200377 flags = 3;
378 break;
Willy Tarreauef9a3602012-12-08 22:29:20 +0100379 case CO_SRC_TPROXY_CIP:
380 case CO_SRC_TPROXY_DYN:
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200381 flags = 1;
382 break;
383 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200384 }
Willy Tarreaub1d67742010-03-29 19:36:59 +0200385
Willy Tarreau9650f372009-08-16 14:02:45 +0200386#ifdef SO_BINDTODEVICE
387 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100388 if (src->iface_name)
389 setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, src->iface_name, src->iface_len + 1);
Willy Tarreau9650f372009-08-16 14:02:45 +0200390#endif
391
Willy Tarreaua4380b42012-12-08 22:49:11 +0100392 if (src->sport_range) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200393 int attempts = 10; /* should be more than enough to find a spare port */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100394 struct sockaddr_storage sa;
Willy Tarreau9650f372009-08-16 14:02:45 +0200395
396 ret = 1;
Willy Tarreaua4380b42012-12-08 22:49:11 +0100397 sa = src->source_addr;
Willy Tarreau9650f372009-08-16 14:02:45 +0200398
399 do {
400 /* note: in case of retry, we may have to release a previously
401 * allocated port, hence this loop's construct.
402 */
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200403 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
404 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200405
406 if (!attempts)
407 break;
408 attempts--;
409
Willy Tarreaua4380b42012-12-08 22:49:11 +0100410 fdinfo[fd].local_port = port_range_alloc_port(src->sport_range);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100411 if (!fdinfo[fd].local_port) {
412 conn->err_code = CO_ER_PORT_RANGE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200413 break;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100414 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200415
Willy Tarreaua4380b42012-12-08 22:49:11 +0100416 fdinfo[fd].port_range = src->sport_range;
417 set_host_port(&sa, fdinfo[fd].local_port);
Willy Tarreau9650f372009-08-16 14:02:45 +0200418
Willy Tarreaua4380b42012-12-08 22:49:11 +0100419 ret = tcp_bind_socket(fd, flags, &sa, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100420 if (ret != 0)
421 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200422 } while (ret != 0); /* binding NOK */
423 }
424 else {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100425 ret = tcp_bind_socket(fd, flags, &src->source_addr, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100426 if (ret != 0)
427 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200428 }
429
Willy Tarreaua4380b42012-12-08 22:49:11 +0100430 if (unlikely(ret != 0)) {
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200431 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
432 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200433 close(fd);
434
Willy Tarreau9650f372009-08-16 14:02:45 +0200435 if (ret == 1) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100436 Alert("Cannot bind to source address before connect() for backend %s. Aborting.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200437 be->id);
438 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100439 "Cannot bind to source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200440 be->id);
441 } else {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100442 Alert("Cannot bind to tproxy source address before connect() for backend %s. Aborting.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200443 be->id);
444 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100445 "Cannot bind to tproxy source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200446 be->id);
447 }
Willy Tarreau9ce70132014-01-24 16:08:19 +0100448 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200449 return SN_ERR_RESOURCE;
450 }
451 }
452
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200453 /* if a send_proxy is there, there are data */
454 data |= conn->send_proxy_ofs;
455
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400456#if defined(TCP_QUICKACK)
Willy Tarreau9650f372009-08-16 14:02:45 +0200457 /* disabling tcp quick ack now allows the first request to leave the
458 * machine with the first ACK. We only do this if there are pending
Willy Tarreauf0837b22012-11-24 10:24:27 +0100459 * data in the buffer.
Willy Tarreau9650f372009-08-16 14:02:45 +0200460 */
Willy Tarreauf0837b22012-11-24 10:24:27 +0100461 if (delack == 2 || ((delack || data) && (be->options2 & PR_O2_SMARTCON)))
Simon Hormande072bd2011-06-24 15:11:37 +0900462 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Willy Tarreau9650f372009-08-16 14:02:45 +0200463#endif
464
Willy Tarreaue803de22010-01-21 17:43:04 +0100465 if (global.tune.server_sndbuf)
466 setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &global.tune.server_sndbuf, sizeof(global.tune.server_sndbuf));
467
468 if (global.tune.server_rcvbuf)
469 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &global.tune.server_rcvbuf, sizeof(global.tune.server_rcvbuf));
470
Willy Tarreau986a9d22012-08-30 21:11:38 +0200471 if ((connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) == -1) &&
Willy Tarreau9650f372009-08-16 14:02:45 +0200472 (errno != EINPROGRESS) && (errno != EALREADY) && (errno != EISCONN)) {
473
Willy Tarreaub1719512012-12-08 23:03:28 +0100474 if (errno == EAGAIN || errno == EADDRINUSE || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200475 char *msg;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100476 if (errno == EAGAIN || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200477 msg = "no free ports";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100478 conn->err_code = CO_ER_FREE_PORTS;
479 }
480 else {
Willy Tarreau9650f372009-08-16 14:02:45 +0200481 msg = "local address already in use";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100482 conn->err_code = CO_ER_ADDR_INUSE;
483 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200484
Willy Tarreaub1719512012-12-08 23:03:28 +0100485 qfprintf(stderr,"Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200486 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
487 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200488 close(fd);
Willy Tarreaub1719512012-12-08 23:03:28 +0100489 send_log(be, LOG_ERR, "Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100490 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200491 return SN_ERR_RESOURCE;
492 } else if (errno == ETIMEDOUT) {
493 //qfprintf(stderr,"Connect(): ETIMEDOUT");
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200494 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
495 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200496 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100497 conn->err_code = CO_ER_SOCK_ERR;
498 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200499 return SN_ERR_SRVTO;
500 } else {
501 // (errno == ECONNREFUSED || errno == ENETUNREACH || errno == EACCES || errno == EPERM)
502 //qfprintf(stderr,"Connect(): %d", errno);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200503 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
504 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200505 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100506 conn->err_code = CO_ER_SOCK_ERR;
507 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200508 return SN_ERR_SRVCL;
509 }
510 }
511
Willy Tarreaufc8f1f02012-12-08 18:53:44 +0100512 conn->flags |= CO_FL_ADDR_TO_SET;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200513
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200514 /* Prepare to send a few handshakes related to the on-wire protocol. */
515 if (conn->send_proxy_ofs)
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200516 conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200517
Willy Tarreauf79c8172013-10-21 16:30:56 +0200518 conn_ctrl_init(conn); /* registers the FD */
Willy Tarreauad38ace2013-12-15 14:19:38 +0100519 fdtab[fd].linger_risk = 1; /* close hard if needed */
Willy Tarreau986a9d22012-08-30 21:11:38 +0200520 conn_sock_want_send(conn); /* for connect status */
Willy Tarreau15678ef2012-08-31 13:54:11 +0200521
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200522 if (conn_xprt_init(conn) < 0) {
Willy Tarreauf79c8172013-10-21 16:30:56 +0200523 conn_force_close(conn);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100524 conn->flags |= CO_FL_ERROR;
Willy Tarreau15678ef2012-08-31 13:54:11 +0200525 return SN_ERR_RESOURCE;
Willy Tarreau184636e2012-09-06 14:04:41 +0200526 }
Willy Tarreau15678ef2012-08-31 13:54:11 +0200527
Willy Tarreau14f8e862012-08-30 22:23:13 +0200528 if (data)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200529 conn_data_want_send(conn); /* prepare to send data if any */
Willy Tarreau9650f372009-08-16 14:02:45 +0200530
Willy Tarreau9650f372009-08-16 14:02:45 +0200531 return SN_ERR_NONE; /* connection is OK */
532}
533
534
Willy Tarreau59b94792012-05-11 16:16:40 +0200535/*
536 * Retrieves the source address for the socket <fd>, with <dir> indicating
537 * if we're a listener (=0) or an initiator (!=0). It returns 0 in case of
538 * success, -1 in case of error. The socket's source address is stored in
539 * <sa> for <salen> bytes.
540 */
541int tcp_get_src(int fd, struct sockaddr *sa, socklen_t salen, int dir)
542{
543 if (dir)
544 return getsockname(fd, sa, &salen);
545 else
546 return getpeername(fd, sa, &salen);
547}
548
549
550/*
551 * Retrieves the original destination address for the socket <fd>, with <dir>
552 * indicating if we're a listener (=0) or an initiator (!=0). In the case of a
553 * listener, if the original destination address was translated, the original
554 * address is retrieved. It returns 0 in case of success, -1 in case of error.
555 * The socket's source address is stored in <sa> for <salen> bytes.
556 */
557int tcp_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir)
558{
559 if (dir)
560 return getpeername(fd, sa, &salen);
561#if defined(TPROXY) && defined(SO_ORIGINAL_DST)
562 else if (getsockopt(fd, SOL_IP, SO_ORIGINAL_DST, sa, &salen) == 0)
563 return 0;
564#endif
565 else
566 return getsockname(fd, sa, &salen);
567}
568
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200569/* Tries to drain any pending incoming data from the socket to reach the
Willy Tarreau7f4bcc32014-01-20 11:26:12 +0100570 * receive shutdown. Returns positive if the shutdown was found, negative
571 * if EAGAIN was hit, otherwise zero. This is useful to decide whether we
572 * can close a connection cleanly are we must kill it hard.
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200573 */
574int tcp_drain(int fd)
575{
576 int turns = 2;
577 int len;
578
579 while (turns) {
580#ifdef MSG_TRUNC_CLEARS_INPUT
581 len = recv(fd, NULL, INT_MAX, MSG_DONTWAIT | MSG_NOSIGNAL | MSG_TRUNC);
582 if (len == -1 && errno == EFAULT)
583#endif
584 len = recv(fd, trash.str, trash.size, MSG_DONTWAIT | MSG_NOSIGNAL);
585
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100586 if (len == 0) {
587 /* cool, shutdown received */
588 fdtab[fd].linger_risk = 0;
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200589 return 1;
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100590 }
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200591
592 if (len < 0) {
Willy Tarreauf817e9f2014-01-10 16:58:45 +0100593 if (errno == EAGAIN) {
594 /* connection not closed yet */
595 fd_cant_recv(fd);
Willy Tarreau7f4bcc32014-01-20 11:26:12 +0100596 return -1;
Willy Tarreauf817e9f2014-01-10 16:58:45 +0100597 }
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200598 if (errno == EINTR) /* oops, try again */
599 continue;
600 /* other errors indicate a dead connection, fine. */
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100601 fdtab[fd].linger_risk = 0;
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200602 return 1;
603 }
604 /* OK we read some data, let's try again once */
605 turns--;
606 }
607 /* some data are still present, give up */
608 return 0;
609}
610
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200611/* This is the callback which is set when a connection establishment is pending
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100612 * and we have nothing to send. It updates the FD polling status. It returns 0
613 * if it fails in a fatal way or needs to poll to go further, otherwise it
614 * returns non-zero and removes the CO_FL_WAIT_L4_CONN flag from the connection's
615 * flags. In case of error, it sets CO_FL_ERROR and leaves the error code in
616 * errno. The error checking is done in two passes in order to limit the number
617 * of syscalls in the normal case :
618 * - if POLL_ERR was reported by the poller, we check for a pending error on
619 * the socket before proceeding. If found, it's assigned to errno so that
620 * upper layers can see it.
621 * - otherwise connect() is used to check the connection state again, since
622 * the getsockopt return cannot reliably be used to know if the connection
623 * is still pending or ready. This one may often return an error as well,
624 * since we don't always have POLL_ERR (eg: OSX or cached events).
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200625 */
Willy Tarreau239d7182012-07-23 18:53:03 +0200626int tcp_connect_probe(struct connection *conn)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200627{
Willy Tarreau239d7182012-07-23 18:53:03 +0200628 int fd = conn->t.sock.fd;
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100629 socklen_t lskerr;
630 int skerr;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200631
Willy Tarreau80184712012-07-06 14:54:49 +0200632 if (conn->flags & CO_FL_ERROR)
Willy Tarreauafad0e02012-08-09 14:45:22 +0200633 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200634
Willy Tarreau3c728722014-01-23 13:50:42 +0100635 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200636 return 0;
637
Willy Tarreau80184712012-07-06 14:54:49 +0200638 if (!(conn->flags & CO_FL_WAIT_L4_CONN))
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200639 return 1; /* strange we were called while ready */
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200640
Willy Tarreaufd803bb2014-01-20 15:13:07 +0100641 if (!fd_send_ready(fd))
642 return 0;
643
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100644 /* we might be the first witness of FD_POLL_ERR. Note that FD_POLL_HUP
645 * without FD_POLL_IN also indicates a hangup without input data meaning
646 * there was no connection.
647 */
648 if (fdtab[fd].ev & FD_POLL_ERR ||
649 (fdtab[fd].ev & (FD_POLL_IN|FD_POLL_HUP)) == FD_POLL_HUP) {
650 skerr = 0;
651 lskerr = sizeof(skerr);
652 getsockopt(fd, SOL_SOCKET, SO_ERROR, &skerr, &lskerr);
653 errno = skerr;
654 if (errno == EAGAIN)
655 errno = 0;
656 if (errno)
657 goto out_error;
658 }
Willy Tarreau2da156f2012-07-23 15:07:23 +0200659
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100660 /* Use connect() to check the state of the socket. This has the
661 * advantage of giving us the following info :
Willy Tarreau2c6be842012-07-06 17:12:34 +0200662 * - error
663 * - connecting (EALREADY, EINPROGRESS)
664 * - connected (EISCONN, 0)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200665 */
Willy Tarreau986a9d22012-08-30 21:11:38 +0200666 if (connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) < 0) {
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200667 if (errno == EALREADY || errno == EINPROGRESS) {
Willy Tarreaud486ef52012-12-10 17:03:52 +0100668 __conn_sock_stop_recv(conn);
Willy Tarreaue1f50c42014-01-22 20:02:06 +0100669 fd_cant_send(fd);
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200670 return 0;
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200671 }
Willy Tarreaua190d592012-05-20 18:35:19 +0200672
Willy Tarreau2c6be842012-07-06 17:12:34 +0200673 if (errno && errno != EISCONN)
Willy Tarreaua190d592012-05-20 18:35:19 +0200674 goto out_error;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200675
Willy Tarreau2c6be842012-07-06 17:12:34 +0200676 /* otherwise we're connected */
Willy Tarreaua190d592012-05-20 18:35:19 +0200677 }
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200678
Willy Tarreau076be252012-07-06 16:02:29 +0200679 /* The FD is ready now, we'll mark the connection as complete and
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200680 * forward the event to the transport layer which will notify the
681 * data layer.
Willy Tarreaua190d592012-05-20 18:35:19 +0200682 */
Willy Tarreau80184712012-07-06 14:54:49 +0200683 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200684 return 1;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200685
686 out_error:
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200687 /* Write error on the file descriptor. Report it to the connection
688 * and disable polling on this FD.
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200689 */
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100690 fdtab[fd].linger_risk = 0;
Willy Tarreau26f4a042013-12-04 23:44:10 +0100691 conn->flags |= CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH;
Willy Tarreaud486ef52012-12-10 17:03:52 +0100692 __conn_sock_stop_both(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200693 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200694}
695
Willy Tarreau59b94792012-05-11 16:16:40 +0200696
Willy Tarreaue6b98942007-10-29 01:09:36 +0100697/* This function tries to bind a TCPv4/v6 listener. It may return a warning or
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100698 * an error message in <errmsg> if the message is at most <errlen> bytes long
699 * (including '\0'). Note that <errmsg> may be NULL if <errlen> is also zero.
700 * The return value is composed from ERR_ABORT, ERR_WARN,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100701 * ERR_ALERT, ERR_RETRYABLE and ERR_FATAL. ERR_NONE indicates that everything
702 * was alright and that no message was returned. ERR_RETRYABLE means that an
703 * error occurred but that it may vanish after a retry (eg: port in use), and
Aman Guptad94991d2012-04-06 17:39:26 -0700704 * ERR_FATAL indicates a non-fixable error. ERR_WARN and ERR_ALERT do not alter
Willy Tarreaue6b98942007-10-29 01:09:36 +0100705 * the meaning of the error, but just indicate that a message is present which
706 * should be displayed with the respective level. Last, ERR_ABORT indicates
707 * that it's pointless to try to start other listeners. No error message is
708 * returned if errlen is NULL.
709 */
710int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen)
711{
712 __label__ tcp_return, tcp_close_return;
713 int fd, err;
Willy Tarreau40aa0702013-03-10 23:51:38 +0100714 int ext, ready;
715 socklen_t ready_len;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100716 const char *msg = NULL;
717
718 /* ensure we never return garbage */
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100719 if (errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100720 *errmsg = 0;
721
722 if (listener->state != LI_ASSIGNED)
723 return ERR_NONE; /* already bound */
724
725 err = ERR_NONE;
726
Willy Tarreau40aa0702013-03-10 23:51:38 +0100727 /* if the listener already has an fd assigned, then we were offered the
728 * fd by an external process (most likely the parent), and we don't want
729 * to create a new socket. However we still want to set a few flags on
730 * the socket.
731 */
732 fd = listener->fd;
733 ext = (fd >= 0);
734
735 if (!ext && (fd = socket(listener->addr.ss_family, SOCK_STREAM, IPPROTO_TCP)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100736 err |= ERR_RETRYABLE | ERR_ALERT;
737 msg = "cannot create listening socket";
738 goto tcp_return;
739 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100740
Willy Tarreaue6b98942007-10-29 01:09:36 +0100741 if (fd >= global.maxsock) {
742 err |= ERR_FATAL | ERR_ABORT | ERR_ALERT;
743 msg = "not enough free sockets (raise '-n' parameter)";
744 goto tcp_close_return;
745 }
746
Willy Tarreaufb14edc2009-06-14 15:24:37 +0200747 if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100748 err |= ERR_FATAL | ERR_ALERT;
749 msg = "cannot make socket non-blocking";
750 goto tcp_close_return;
751 }
752
Willy Tarreau40aa0702013-03-10 23:51:38 +0100753 if (!ext && setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100754 /* not fatal but should be reported */
755 msg = "cannot do so_reuseaddr";
756 err |= ERR_ALERT;
757 }
758
759 if (listener->options & LI_O_NOLINGER)
Simon Hormande072bd2011-06-24 15:11:37 +0900760 setsockopt(fd, SOL_SOCKET, SO_LINGER, &nolinger, sizeof(struct linger));
Willy Tarreauedcf6682008-11-30 23:15:34 +0100761
Willy Tarreaue6b98942007-10-29 01:09:36 +0100762#ifdef SO_REUSEPORT
763 /* OpenBSD supports this. As it's present in old libc versions of Linux,
764 * it might return an error that we will silently ignore.
765 */
Willy Tarreau40aa0702013-03-10 23:51:38 +0100766 if (!ext)
767 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));
Willy Tarreaue6b98942007-10-29 01:09:36 +0100768#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200769
Willy Tarreau40aa0702013-03-10 23:51:38 +0100770 if (!ext && (listener->options & LI_O_FOREIGN)) {
David du Colombier65c17962012-07-13 14:34:59 +0200771 switch (listener->addr.ss_family) {
772 case AF_INET:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200773 if (1
774#if defined(IP_TRANSPARENT)
775 && (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == -1)
776#endif
777#if defined(IP_FREEBIND)
778 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
779#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200780#if defined(IP_BINDANY)
781 && (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == -1)
782#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200783#if defined(SO_BINDANY)
784 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
785#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200786 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200787 msg = "cannot make listening socket transparent";
788 err |= ERR_ALERT;
789 }
790 break;
791 case AF_INET6:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200792 if (1
793#if defined(IPV6_TRANSPARENT)
794 && (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == -1)
795#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100796#if defined(IP_FREEBIND)
797 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
798#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200799#if defined(IPV6_BINDANY)
800 && (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == -1)
801#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200802#if defined(SO_BINDANY)
803 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
804#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200805 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200806 msg = "cannot make listening socket transparent";
807 err |= ERR_ALERT;
808 }
809 break;
810 }
Willy Tarreaub1e52e82008-01-13 14:49:51 +0100811 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200812
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100813#ifdef SO_BINDTODEVICE
814 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreau40aa0702013-03-10 23:51:38 +0100815 if (!ext && listener->interface) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100816 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
Willy Tarreau604e8302009-03-06 00:48:23 +0100817 listener->interface, strlen(listener->interface) + 1) == -1) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100818 msg = "cannot bind listener to device";
819 err |= ERR_WARN;
820 }
821 }
822#endif
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400823#if defined(TCP_MAXSEG)
Willy Tarreau48a7e722010-12-24 15:26:39 +0100824 if (listener->maxseg > 0) {
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400825 if (setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG,
Willy Tarreaube1b9182009-06-14 18:48:19 +0200826 &listener->maxseg, sizeof(listener->maxseg)) == -1) {
827 msg = "cannot set MSS";
828 err |= ERR_WARN;
829 }
830 }
831#endif
Willy Tarreaucb6cd432009-10-13 07:34:14 +0200832#if defined(TCP_DEFER_ACCEPT)
833 if (listener->options & LI_O_DEF_ACCEPT) {
834 /* defer accept by up to one second */
835 int accept_delay = 1;
836 if (setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &accept_delay, sizeof(accept_delay)) == -1) {
837 msg = "cannot enable DEFER_ACCEPT";
838 err |= ERR_WARN;
839 }
840 }
841#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +0200842#if defined(TCP_FASTOPEN)
843 if (listener->options & LI_O_TCP_FO) {
844 /* TFO needs a queue length, let's use the configured backlog */
845 int qlen = listener->backlog ? listener->backlog : listener->maxconn;
846 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) == -1) {
847 msg = "cannot enable TCP_FASTOPEN";
848 err |= ERR_WARN;
849 }
850 }
851#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +0100852#if defined(IPV6_V6ONLY)
853 if (listener->options & LI_O_V6ONLY)
854 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
Willy Tarreau77e3af92012-11-24 15:07:23 +0100855 else if (listener->options & LI_O_V4V6)
856 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero));
Willy Tarreau9b6700f2012-11-24 11:55:28 +0100857#endif
858
Willy Tarreau40aa0702013-03-10 23:51:38 +0100859 if (!ext && bind(fd, (struct sockaddr *)&listener->addr, listener->proto->sock_addrlen) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100860 err |= ERR_RETRYABLE | ERR_ALERT;
861 msg = "cannot bind socket";
862 goto tcp_close_return;
863 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100864
Willy Tarreau40aa0702013-03-10 23:51:38 +0100865 ready = 0;
866 ready_len = sizeof(ready);
867 if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &ready, &ready_len) == -1)
868 ready = 0;
869
870 if (!(ext && ready) && /* only listen if not already done by external process */
871 listen(fd, listener->backlog ? listener->backlog : listener->maxconn) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100872 err |= ERR_RETRYABLE | ERR_ALERT;
873 msg = "cannot listen to socket";
874 goto tcp_close_return;
875 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100876
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400877#if defined(TCP_QUICKACK)
Willy Tarreau9ea05a72009-06-14 12:07:01 +0200878 if (listener->options & LI_O_NOQUICKACK)
Simon Hormande072bd2011-06-24 15:11:37 +0900879 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Willy Tarreau9ea05a72009-06-14 12:07:01 +0200880#endif
881
Willy Tarreaue6b98942007-10-29 01:09:36 +0100882 /* the socket is ready */
883 listener->fd = fd;
884 listener->state = LI_LISTEN;
885
Willy Tarreaueabf3132008-08-29 23:36:51 +0200886 fdtab[fd].owner = listener; /* reference the listener instead of a task */
Willy Tarreauaece46a2012-07-06 12:25:58 +0200887 fdtab[fd].iocb = listener->proto->accept;
Willy Tarreaueb472682010-05-28 18:46:57 +0200888 fd_insert(fd);
889
Willy Tarreaue6b98942007-10-29 01:09:36 +0100890 tcp_return:
Cyril Bonté43ba1b32010-11-01 19:26:01 +0100891 if (msg && errlen) {
892 char pn[INET6_ADDRSTRLEN];
893
Willy Tarreau631f01c2011-09-05 00:36:48 +0200894 addr_to_str(&listener->addr, pn, sizeof(pn));
895 snprintf(errmsg, errlen, "%s [%s:%d]", msg, pn, get_host_port(&listener->addr));
Cyril Bonté43ba1b32010-11-01 19:26:01 +0100896 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100897 return err;
898
899 tcp_close_return:
900 close(fd);
901 goto tcp_return;
902}
903
904/* This function creates all TCP sockets bound to the protocol entry <proto>.
905 * It is intended to be used as the protocol's bind_all() function.
906 * The sockets will be registered but not added to any fd_set, in order not to
907 * loose them across the fork(). A call to enable_all_listeners() is needed
908 * to complete initialization. The return value is composed from ERR_*.
909 */
Emeric Bruncf20bf12010-10-22 16:06:11 +0200910static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100911{
912 struct listener *listener;
913 int err = ERR_NONE;
914
915 list_for_each_entry(listener, &proto->listeners, proto_list) {
Emeric Bruncf20bf12010-10-22 16:06:11 +0200916 err |= tcp_bind_listener(listener, errmsg, errlen);
917 if (err & ERR_ABORT)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100918 break;
919 }
920
921 return err;
922}
923
924/* Add listener to the list of tcpv4 listeners. The listener's state
925 * is automatically updated from LI_INIT to LI_ASSIGNED. The number of
926 * listeners is updated. This is the function to use to add a new listener.
927 */
928void tcpv4_add_listener(struct listener *listener)
929{
930 if (listener->state != LI_INIT)
931 return;
932 listener->state = LI_ASSIGNED;
933 listener->proto = &proto_tcpv4;
934 LIST_ADDQ(&proto_tcpv4.listeners, &listener->proto_list);
935 proto_tcpv4.nb_listeners++;
936}
937
938/* Add listener to the list of tcpv4 listeners. The listener's state
939 * is automatically updated from LI_INIT to LI_ASSIGNED. The number of
940 * listeners is updated. This is the function to use to add a new listener.
941 */
942void tcpv6_add_listener(struct listener *listener)
943{
944 if (listener->state != LI_INIT)
945 return;
946 listener->state = LI_ASSIGNED;
947 listener->proto = &proto_tcpv6;
948 LIST_ADDQ(&proto_tcpv6.listeners, &listener->proto_list);
949 proto_tcpv6.nb_listeners++;
950}
951
Willy Tarreaud903bb32014-07-07 20:22:12 +0200952/* Pause a listener. Returns < 0 in case of failure, 0 if the listener
953 * was totally stopped, or > 0 if correctly paused.
954 */
955int tcp_pause_listener(struct listener *l)
956{
957 if (shutdown(l->fd, SHUT_WR) != 0)
958 return -1; /* Solaris dies here */
959
960 if (listen(l->fd, l->backlog ? l->backlog : l->maxconn) != 0)
961 return -1; /* OpenBSD dies here */
962
963 if (shutdown(l->fd, SHUT_RD) != 0)
964 return -1; /* should always be OK */
965 return 1;
966}
967
Willy Tarreauedcf6682008-11-30 23:15:34 +0100968/* This function performs the TCP request analysis on the current request. It
969 * returns 1 if the processing can continue on next analysers, or zero if it
970 * needs more data, encounters an error, or wants to immediately abort the
Willy Tarreaufb356202010-08-03 14:02:05 +0200971 * request. It relies on buffers flags, and updates s->req->analysers. The
972 * function may be called for frontend rules and backend rules. It only relies
973 * on the backend pointer so this works for both cases.
Willy Tarreauedcf6682008-11-30 23:15:34 +0100974 */
Willy Tarreau7421efb2012-07-02 15:11:27 +0200975int tcp_inspect_request(struct session *s, struct channel *req, int an_bit)
Willy Tarreauedcf6682008-11-30 23:15:34 +0100976{
977 struct tcp_rule *rule;
Willy Tarreaud1f96522010-08-03 19:34:32 +0200978 struct stksess *ts;
979 struct stktable *t;
Willy Tarreauedcf6682008-11-30 23:15:34 +0100980 int partial;
981
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100982 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 +0100983 now_ms, __FUNCTION__,
984 s,
985 req,
986 req->rex, req->wex,
987 req->flags,
Willy Tarreau9b28e032012-10-12 23:49:43 +0200988 req->buf->i,
Willy Tarreauedcf6682008-11-30 23:15:34 +0100989 req->analysers);
990
Willy Tarreauedcf6682008-11-30 23:15:34 +0100991 /* We don't know whether we have enough data, so must proceed
992 * this way :
993 * - iterate through all rules in their declaration order
994 * - if one rule returns MISS, it means the inspect delay is
995 * not over yet, then return immediately, otherwise consider
996 * it as a non-match.
997 * - if one rule returns OK, then return OK
998 * - if one rule returns KO, then return KO
999 */
1000
Willy Tarreau9b28e032012-10-12 23:49:43 +02001001 if ((req->flags & CF_SHUTR) || buffer_full(req->buf, global.tune.maxrewrite) ||
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +02001002 !s->be->tcp_req.inspect_delay || tick_is_expired(req->analyse_exp, now_ms))
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001003 partial = SMP_OPT_FINAL;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001004 else
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001005 partial = 0;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001006
Willy Tarreaufb356202010-08-03 14:02:05 +02001007 list_for_each_entry(rule, &s->be->tcp_req.inspect_rules, list) {
Willy Tarreau0cba6072013-11-28 22:21:02 +01001008 enum acl_test_res ret = ACL_TEST_PASS;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001009
1010 if (rule->cond) {
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001011 ret = acl_exec_cond(rule->cond, s->be, s, &s->txn, SMP_OPT_DIR_REQ | partial);
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001012 if (ret == ACL_TEST_MISS)
1013 goto missing_data;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001014
1015 ret = acl_pass(ret);
1016 if (rule->cond->pol == ACL_COND_UNLESS)
1017 ret = !ret;
1018 }
1019
1020 if (ret) {
1021 /* we have a matching rule. */
1022 if (rule->action == TCP_ACT_REJECT) {
Willy Tarreau8263d2b2012-08-28 00:06:31 +02001023 channel_abort(req);
1024 channel_abort(s->rep);
Willy Tarreauedcf6682008-11-30 23:15:34 +01001025 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +02001026
Willy Tarreau7d0aaf32011-03-10 23:25:56 +01001027 s->be->be_counters.denied_req++;
1028 s->fe->fe_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +02001029 if (s->listener->counters)
Willy Tarreau23968d82010-05-23 23:50:44 +02001030 s->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +02001031
Willy Tarreauedcf6682008-11-30 23:15:34 +01001032 if (!(s->flags & SN_ERR_MASK))
1033 s->flags |= SN_ERR_PRXCOND;
1034 if (!(s->flags & SN_FINST_MASK))
1035 s->flags |= SN_FINST_R;
1036 return 0;
1037 }
Willy Tarreau44778ad2013-10-30 19:24:00 +01001038 else if (rule->action >= TCP_ACT_TRK_SC0 && rule->action <= TCP_ACT_TRK_SCMAX) {
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001039 /* Note: only the first valid tracking parameter of each
1040 * applies.
1041 */
1042 struct stktable_key *key;
Willy Tarreau86bd33a2014-06-25 17:01:56 +02001043 struct sample smp;
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001044
Willy Tarreaucc08d2c2014-01-28 23:18:23 +01001045 if (stkctr_entry(&s->stkctr[tcp_trk_idx(rule->action)]))
Willy Tarreau44778ad2013-10-30 19:24:00 +01001046 continue;
1047
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001048 t = rule->act_prm.trk_ctr.table.t;
Willy Tarreau86bd33a2014-06-25 17:01:56 +02001049 key = stktable_fetch_key(t, s->be, s, &s->txn, SMP_OPT_DIR_REQ | partial, rule->act_prm.trk_ctr.expr, &smp);
1050
Willy Tarreauf94735e2014-07-30 08:56:35 +02001051 if ((smp.flags & SMP_F_MAY_CHANGE) && !(partial & SMP_OPT_FINAL))
1052 goto missing_data; /* key might appear later */
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001053
1054 if (key && (ts = stktable_get_entry(t, key))) {
Willy Tarreaud5ca9ab2013-05-28 17:40:25 +02001055 session_track_stkctr(&s->stkctr[tcp_trk_idx(rule->action)], t, ts);
Willy Tarreaucc08d2c2014-01-28 23:18:23 +01001056 stkctr_set_flags(&s->stkctr[tcp_trk_idx(rule->action)], STKCTR_TRACK_CONTENT);
Willy Tarreaud5ca9ab2013-05-28 17:40:25 +02001057 if (s->fe != s->be)
Willy Tarreaucc08d2c2014-01-28 23:18:23 +01001058 stkctr_set_flags(&s->stkctr[tcp_trk_idx(rule->action)], STKCTR_TRACK_BACKEND);
Willy Tarreaud1f96522010-08-03 19:34:32 +02001059 }
1060 }
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001061 else if (rule->action == TCP_ACT_CAPTURE) {
1062 struct sample *key;
1063 struct cap_hdr *h = rule->act_prm.cap.hdr;
1064 char **cap = s->txn.req.cap;
1065 int len;
1066
1067 key = sample_fetch_string(s->be, s, &s->txn, SMP_OPT_DIR_REQ | partial, rule->act_prm.cap.expr);
1068 if (!key)
1069 continue;
1070
1071 if (key->flags & SMP_F_MAY_CHANGE)
1072 goto missing_data;
1073
1074 if (cap[h->index] == NULL)
1075 cap[h->index] = pool_alloc2(h->pool);
1076
1077 if (cap[h->index] == NULL) /* no more capture memory */
1078 continue;
1079
1080 len = key->data.str.len;
1081 if (len > h->len)
1082 len = h->len;
1083
1084 memcpy(cap[h->index], key->data.str.str, len);
1085 cap[h->index][len] = 0;
1086 }
Willy Tarreaud1f96522010-08-03 19:34:32 +02001087 else {
Willy Tarreauedcf6682008-11-30 23:15:34 +01001088 /* otherwise accept */
Willy Tarreaud1f96522010-08-03 19:34:32 +02001089 break;
1090 }
Willy Tarreauedcf6682008-11-30 23:15:34 +01001091 }
1092 }
1093
1094 /* if we get there, it means we have no rule which matches, or
1095 * we have an explicit accept, so we apply the default accept.
1096 */
Willy Tarreau3a816292009-07-07 10:55:49 +02001097 req->analysers &= ~an_bit;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001098 req->analyse_exp = TICK_ETERNITY;
1099 return 1;
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001100
1101 missing_data:
1102 channel_dont_connect(req);
1103 /* just set the request timeout once at the beginning of the request */
1104 if (!tick_isset(req->analyse_exp) && s->be->tcp_req.inspect_delay)
1105 req->analyse_exp = tick_add(now_ms, s->be->tcp_req.inspect_delay);
1106 return 0;
1107
Willy Tarreauedcf6682008-11-30 23:15:34 +01001108}
1109
Emeric Brun97679e72010-09-23 17:56:44 +02001110/* This function performs the TCP response analysis on the current response. It
1111 * returns 1 if the processing can continue on next analysers, or zero if it
1112 * needs more data, encounters an error, or wants to immediately abort the
1113 * response. It relies on buffers flags, and updates s->rep->analysers. The
1114 * function may be called for backend rules.
1115 */
Willy Tarreau7421efb2012-07-02 15:11:27 +02001116int tcp_inspect_response(struct session *s, struct channel *rep, int an_bit)
Emeric Brun97679e72010-09-23 17:56:44 +02001117{
1118 struct tcp_rule *rule;
1119 int partial;
1120
Willy Tarreau02d6cfc2012-03-01 18:19:58 +01001121 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 +02001122 now_ms, __FUNCTION__,
1123 s,
1124 rep,
1125 rep->rex, rep->wex,
1126 rep->flags,
Willy Tarreau9b28e032012-10-12 23:49:43 +02001127 rep->buf->i,
Emeric Brun97679e72010-09-23 17:56:44 +02001128 rep->analysers);
1129
1130 /* We don't know whether we have enough data, so must proceed
1131 * this way :
1132 * - iterate through all rules in their declaration order
1133 * - if one rule returns MISS, it means the inspect delay is
1134 * not over yet, then return immediately, otherwise consider
1135 * it as a non-match.
1136 * - if one rule returns OK, then return OK
1137 * - if one rule returns KO, then return KO
1138 */
1139
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001140 if (rep->flags & CF_SHUTR || tick_is_expired(rep->analyse_exp, now_ms))
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001141 partial = SMP_OPT_FINAL;
Emeric Brun97679e72010-09-23 17:56:44 +02001142 else
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001143 partial = 0;
Emeric Brun97679e72010-09-23 17:56:44 +02001144
1145 list_for_each_entry(rule, &s->be->tcp_rep.inspect_rules, list) {
Willy Tarreau0cba6072013-11-28 22:21:02 +01001146 enum acl_test_res ret = ACL_TEST_PASS;
Emeric Brun97679e72010-09-23 17:56:44 +02001147
1148 if (rule->cond) {
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001149 ret = acl_exec_cond(rule->cond, s->be, s, &s->txn, SMP_OPT_DIR_RES | partial);
Thierry FOURNIERa65b3432013-11-28 18:22:00 +01001150 if (ret == ACL_TEST_MISS) {
Emeric Brun97679e72010-09-23 17:56:44 +02001151 /* just set the analyser timeout once at the beginning of the response */
1152 if (!tick_isset(rep->analyse_exp) && s->be->tcp_rep.inspect_delay)
Willy Tarreau0bb166b2013-11-04 15:56:53 +01001153 rep->analyse_exp = tick_add(now_ms, s->be->tcp_rep.inspect_delay);
Emeric Brun97679e72010-09-23 17:56:44 +02001154 return 0;
1155 }
1156
1157 ret = acl_pass(ret);
1158 if (rule->cond->pol == ACL_COND_UNLESS)
1159 ret = !ret;
1160 }
1161
1162 if (ret) {
1163 /* we have a matching rule. */
1164 if (rule->action == TCP_ACT_REJECT) {
Willy Tarreau8263d2b2012-08-28 00:06:31 +02001165 channel_abort(rep);
1166 channel_abort(s->req);
Emeric Brun97679e72010-09-23 17:56:44 +02001167 rep->analysers = 0;
1168
Willy Tarreau7d0aaf32011-03-10 23:25:56 +01001169 s->be->be_counters.denied_resp++;
1170 s->fe->fe_counters.denied_resp++;
Emeric Brun97679e72010-09-23 17:56:44 +02001171 if (s->listener->counters)
1172 s->listener->counters->denied_resp++;
1173
1174 if (!(s->flags & SN_ERR_MASK))
1175 s->flags |= SN_ERR_PRXCOND;
1176 if (!(s->flags & SN_FINST_MASK))
1177 s->flags |= SN_FINST_D;
1178 return 0;
1179 }
Willy Tarreaucc1e04b2013-09-11 23:20:29 +02001180 else if (rule->action == TCP_ACT_CLOSE) {
1181 rep->prod->flags |= SI_FL_NOLINGER | SI_FL_NOHALF;
1182 si_shutr(rep->prod);
1183 si_shutw(rep->prod);
1184 break;
1185 }
Emeric Brun97679e72010-09-23 17:56:44 +02001186 else {
1187 /* otherwise accept */
1188 break;
1189 }
1190 }
1191 }
1192
1193 /* if we get there, it means we have no rule which matches, or
1194 * we have an explicit accept, so we apply the default accept.
1195 */
1196 rep->analysers &= ~an_bit;
1197 rep->analyse_exp = TICK_ETERNITY;
1198 return 1;
1199}
1200
1201
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001202/* This function performs the TCP layer4 analysis on the current request. It
1203 * returns 0 if a reject rule matches, otherwise 1 if either an accept rule
1204 * matches or if no more rule matches. It can only use rules which don't need
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001205 * any data. This only works on connection-based client-facing stream interfaces.
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001206 */
1207int tcp_exec_req_rules(struct session *s)
1208{
1209 struct tcp_rule *rule;
Willy Tarreauf059a0f2010-08-03 16:29:52 +02001210 struct stksess *ts;
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001211 struct stktable *t = NULL;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001212 struct connection *conn = objt_conn(s->si[0].end);
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001213 int result = 1;
Willy Tarreau0cba6072013-11-28 22:21:02 +01001214 enum acl_test_res ret;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001215
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001216 if (!conn)
1217 return result;
1218
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001219 list_for_each_entry(rule, &s->fe->tcp_req.l4_rules, list) {
Thierry FOURNIERa65b3432013-11-28 18:22:00 +01001220 ret = ACL_TEST_PASS;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001221
1222 if (rule->cond) {
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001223 ret = acl_exec_cond(rule->cond, s->fe, s, NULL, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001224 ret = acl_pass(ret);
1225 if (rule->cond->pol == ACL_COND_UNLESS)
1226 ret = !ret;
1227 }
1228
1229 if (ret) {
1230 /* we have a matching rule. */
1231 if (rule->action == TCP_ACT_REJECT) {
Willy Tarreau7d0aaf32011-03-10 23:25:56 +01001232 s->fe->fe_counters.denied_conn++;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001233 if (s->listener->counters)
Willy Tarreau2799e982010-06-05 15:43:21 +02001234 s->listener->counters->denied_conn++;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001235
1236 if (!(s->flags & SN_ERR_MASK))
1237 s->flags |= SN_ERR_PRXCOND;
1238 if (!(s->flags & SN_FINST_MASK))
1239 s->flags |= SN_FINST_R;
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001240 result = 0;
1241 break;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001242 }
Willy Tarreau44778ad2013-10-30 19:24:00 +01001243 else if (rule->action >= TCP_ACT_TRK_SC0 && rule->action <= TCP_ACT_TRK_SCMAX) {
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001244 /* Note: only the first valid tracking parameter of each
1245 * applies.
1246 */
1247 struct stktable_key *key;
1248
Willy Tarreaucc08d2c2014-01-28 23:18:23 +01001249 if (stkctr_entry(&s->stkctr[tcp_trk_idx(rule->action)]))
Willy Tarreau44778ad2013-10-30 19:24:00 +01001250 continue;
1251
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001252 t = rule->act_prm.trk_ctr.table.t;
Willy Tarreaud0083942014-06-25 16:20:53 +02001253 key = stktable_fetch_key(t, s->be, s, &s->txn, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->act_prm.trk_ctr.expr, NULL);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001254
Willy Tarreaud5ca9ab2013-05-28 17:40:25 +02001255 if (key && (ts = stktable_get_entry(t, key)))
1256 session_track_stkctr(&s->stkctr[tcp_trk_idx(rule->action)], t, ts);
Willy Tarreauf059a0f2010-08-03 16:29:52 +02001257 }
Willy Tarreau4f0d9192013-06-11 20:40:55 +02001258 else if (rule->action == TCP_ACT_EXPECT_PX) {
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001259 conn->flags |= CO_FL_ACCEPT_PROXY;
1260 conn_sock_want_recv(conn);
Willy Tarreau4f0d9192013-06-11 20:40:55 +02001261 }
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001262 else {
1263 /* otherwise it's an accept */
1264 break;
1265 }
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001266 }
1267 }
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001268 return result;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001269}
1270
Emeric Brun97679e72010-09-23 17:56:44 +02001271/* Parse a tcp-response rule. Return a negative value in case of failure */
1272static int tcp_parse_response_rule(char **args, int arg, int section_type,
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001273 struct proxy *curpx, struct proxy *defpx,
1274 struct tcp_rule *rule, char **err,
1275 unsigned int where,
1276 const char *file, int line)
Emeric Brun97679e72010-09-23 17:56:44 +02001277{
1278 if (curpx == defpx || !(curpx->cap & PR_CAP_BE)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001279 memprintf(err, "%s %s is only allowed in 'backend' sections",
1280 args[0], args[1]);
Emeric Brun97679e72010-09-23 17:56:44 +02001281 return -1;
1282 }
1283
1284 if (strcmp(args[arg], "accept") == 0) {
1285 arg++;
1286 rule->action = TCP_ACT_ACCEPT;
1287 }
1288 else if (strcmp(args[arg], "reject") == 0) {
1289 arg++;
1290 rule->action = TCP_ACT_REJECT;
1291 }
Willy Tarreaucc1e04b2013-09-11 23:20:29 +02001292 else if (strcmp(args[arg], "close") == 0) {
1293 arg++;
1294 rule->action = TCP_ACT_CLOSE;
1295 }
Emeric Brun97679e72010-09-23 17:56:44 +02001296 else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001297 memprintf(err,
Willy Tarreaucc1e04b2013-09-11 23:20:29 +02001298 "'%s %s' expects 'accept', 'close' or 'reject' in %s '%s' (got '%s')",
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001299 args[0], args[1], proxy_type_str(curpx), curpx->id, args[arg]);
Emeric Brun97679e72010-09-23 17:56:44 +02001300 return -1;
1301 }
1302
1303 if (strcmp(args[arg], "if") == 0 || strcmp(args[arg], "unless") == 0) {
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001304 if ((rule->cond = build_acl_cond(file, line, curpx, (const char **)args+arg, err)) == NULL) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001305 memprintf(err,
1306 "'%s %s %s' : error detected in %s '%s' while parsing '%s' condition : %s",
1307 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg], *err);
Emeric Brun97679e72010-09-23 17:56:44 +02001308 return -1;
1309 }
1310 }
1311 else if (*args[arg]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001312 memprintf(err,
1313 "'%s %s %s' only accepts 'if' or 'unless', in %s '%s' (got '%s')",
Emeric Brun97679e72010-09-23 17:56:44 +02001314 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg]);
1315 return -1;
1316 }
1317 return 0;
1318}
1319
1320
1321
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001322/* Parse a tcp-request rule. Return a negative value in case of failure */
1323static int tcp_parse_request_rule(char **args, int arg, int section_type,
Willy Tarreau80aca902013-01-07 15:42:20 +01001324 struct proxy *curpx, struct proxy *defpx,
1325 struct tcp_rule *rule, char **err,
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001326 unsigned int where, const char *file, int line)
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001327{
1328 if (curpx == defpx) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001329 memprintf(err, "%s %s is not allowed in 'defaults' sections",
1330 args[0], args[1]);
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001331 return -1;
1332 }
1333
1334 if (!strcmp(args[arg], "accept")) {
1335 arg++;
1336 rule->action = TCP_ACT_ACCEPT;
1337 }
1338 else if (!strcmp(args[arg], "reject")) {
1339 arg++;
1340 rule->action = TCP_ACT_REJECT;
1341 }
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001342 else if (strcmp(args[arg], "capture") == 0) {
1343 struct sample_expr *expr;
1344 struct cap_hdr *hdr;
1345 int kw = arg;
1346 int len = 0;
1347
1348 if (!(curpx->cap & PR_CAP_FE)) {
1349 memprintf(err,
1350 "'%s %s %s' : proxy '%s' has no frontend capability",
1351 args[0], args[1], args[kw], curpx->id);
1352 return -1;
1353 }
1354
1355 if (!(where & SMP_VAL_FE_REQ_CNT)) {
1356 memprintf(err,
1357 "'%s %s' is not allowed in '%s %s' rules in %s '%s'",
1358 args[arg], args[arg+1], args[0], args[1], proxy_type_str(curpx), curpx->id);
1359 return -1;
1360 }
1361
1362 arg++;
1363
1364 curpx->conf.args.ctx = ARGC_CAP;
1365 expr = sample_parse_expr(args, &arg, file, line, err, &curpx->conf.args);
1366 if (!expr) {
1367 memprintf(err,
1368 "'%s %s %s' : %s",
1369 args[0], args[1], args[kw], *err);
1370 return -1;
1371 }
1372
1373 if (!(expr->fetch->val & where)) {
1374 memprintf(err,
1375 "'%s %s %s' : fetch method '%s' extracts information from '%s', none of which is available here",
1376 args[0], args[1], args[kw], args[arg-1], sample_src_names(expr->fetch->use));
1377 free(expr);
1378 return -1;
1379 }
1380
1381 if (strcmp(args[arg], "len") == 0) {
1382 arg++;
1383 if (!args[arg]) {
1384 memprintf(err,
1385 "'%s %s %s' : missing length value",
1386 args[0], args[1], args[kw]);
1387 free(expr);
1388 return -1;
1389 }
1390 /* we copy the table name for now, it will be resolved later */
1391 len = atoi(args[arg]);
1392 if (len <= 0) {
1393 memprintf(err,
1394 "'%s %s %s' : length must be > 0",
1395 args[0], args[1], args[kw]);
1396 free(expr);
1397 return -1;
1398 }
1399 arg++;
1400 }
1401
1402 if (!len) {
1403 memprintf(err,
1404 "'%s %s %s' : a positive 'len' argument is mandatory",
1405 args[0], args[1], args[kw]);
1406 free(expr);
1407 return -1;
1408 }
1409
1410 hdr = calloc(sizeof(struct cap_hdr), 1);
1411 hdr->next = curpx->req_cap;
1412 hdr->name = NULL; /* not a header capture */
1413 hdr->namelen = 0;
1414 hdr->len = len;
1415 hdr->pool = create_pool("caphdr", hdr->len + 1, MEM_F_SHARED);
1416 hdr->index = curpx->nb_req_cap++;
1417
1418 curpx->req_cap = hdr;
1419 curpx->to_log |= LW_REQHDR;
1420
1421 /* check if we need to allocate an hdr_idx struct for HTTP parsing */
1422 curpx->http_needed |= !!(expr->fetch->use & SMP_USE_HTTP_ANY);
1423
1424 rule->act_prm.cap.expr = expr;
1425 rule->act_prm.cap.hdr = hdr;
1426 rule->action = TCP_ACT_CAPTURE;
1427 }
Willy Tarreaub4c84932013-07-23 19:15:30 +02001428 else if (strncmp(args[arg], "track-sc", 8) == 0 &&
1429 args[arg][9] == '\0' && args[arg][8] >= '0' &&
Willy Tarreau0363a152014-10-17 11:53:05 +02001430 args[arg][8] < '0' + MAX_SESS_STKCTR) { /* track-sc 0..9 */
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001431 struct sample_expr *expr;
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001432 int kw = arg;
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001433
1434 arg++;
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001435
Willy Tarreaua4312fa2013-04-02 16:34:32 +02001436 curpx->conf.args.ctx = ARGC_TRK;
Thierry FOURNIEReeaa9512014-02-11 14:00:19 +01001437 expr = sample_parse_expr(args, &arg, file, line, err, &curpx->conf.args);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001438 if (!expr) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001439 memprintf(err,
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001440 "'%s %s %s' : %s",
Willy Tarreau975c1782013-12-12 23:16:54 +01001441 args[0], args[1], args[kw], *err);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001442 return -1;
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001443 }
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001444
Willy Tarreau80aca902013-01-07 15:42:20 +01001445 if (!(expr->fetch->val & where)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001446 memprintf(err,
Willy Tarreau80aca902013-01-07 15:42:20 +01001447 "'%s %s %s' : fetch method '%s' extracts information from '%s', none of which is available here",
Willy Tarreau33c60de2013-04-12 08:26:32 +02001448 args[0], args[1], args[kw], args[arg-1], sample_src_names(expr->fetch->use));
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001449 free(expr);
1450 return -1;
1451 }
1452
1453 /* check if we need to allocate an hdr_idx struct for HTTP parsing */
Willy Tarreau25320b22013-03-24 07:22:08 +01001454 curpx->http_needed |= !!(expr->fetch->use & SMP_USE_HTTP_ANY);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001455
1456 if (strcmp(args[arg], "table") == 0) {
Willy Tarreau598718a2012-12-09 16:57:27 +01001457 arg++;
1458 if (!args[arg]) {
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001459 memprintf(err,
1460 "'%s %s %s' : missing table name",
1461 args[0], args[1], args[kw]);
1462 free(expr);
1463 return -1;
1464 }
1465 /* we copy the table name for now, it will be resolved later */
Willy Tarreau598718a2012-12-09 16:57:27 +01001466 rule->act_prm.trk_ctr.table.n = strdup(args[arg]);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001467 arg++;
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001468 }
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001469 rule->act_prm.trk_ctr.expr = expr;
Willy Tarreaube4a3ef2013-06-17 15:04:07 +02001470 rule->action = TCP_ACT_TRK_SC0 + args[kw][8] - '0';
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001471 }
Willy Tarreau4f0d9192013-06-11 20:40:55 +02001472 else if (strcmp(args[arg], "expect-proxy") == 0) {
1473 if (strcmp(args[arg+1], "layer4") != 0) {
1474 memprintf(err,
1475 "'%s %s %s' only supports 'layer4' in %s '%s' (got '%s')",
1476 args[0], args[1], args[arg], proxy_type_str(curpx), curpx->id, args[arg+1]);
1477 return -1;
1478 }
1479
1480 if (!(where & SMP_VAL_FE_CON_ACC)) {
1481 memprintf(err,
1482 "'%s %s' is not allowed in '%s %s' rules in %s '%s'",
1483 args[arg], args[arg+1], args[0], args[1], proxy_type_str(curpx), curpx->id);
1484 return -1;
1485 }
1486
1487 arg += 2;
1488 rule->action = TCP_ACT_EXPECT_PX;
1489 }
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001490 else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001491 memprintf(err,
Willy Tarreaub4c84932013-07-23 19:15:30 +02001492 "'%s %s' expects 'accept', 'reject', 'track-sc0' ... 'track-sc%d' "
1493 " in %s '%s' (got '%s')",
Willy Tarreau0363a152014-10-17 11:53:05 +02001494 args[0], args[1], MAX_SESS_STKCTR-1, proxy_type_str(curpx), curpx->id, args[arg]);
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001495 return -1;
1496 }
1497
1498 if (strcmp(args[arg], "if") == 0 || strcmp(args[arg], "unless") == 0) {
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001499 if ((rule->cond = build_acl_cond(file, line, curpx, (const char **)args+arg, err)) == NULL) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001500 memprintf(err,
1501 "'%s %s %s' : error detected in %s '%s' while parsing '%s' condition : %s",
1502 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg], *err);
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001503 return -1;
1504 }
1505 }
1506 else if (*args[arg]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001507 memprintf(err,
1508 "'%s %s %s' only accepts 'if' or 'unless', in %s '%s' (got '%s')",
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001509 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg]);
1510 return -1;
1511 }
1512 return 0;
1513}
1514
Emeric Brun97679e72010-09-23 17:56:44 +02001515/* This function should be called to parse a line starting with the "tcp-response"
1516 * keyword.
1517 */
1518static int tcp_parse_tcp_rep(char **args, int section_type, struct proxy *curpx,
Willy Tarreau28a47d62012-09-18 20:02:48 +02001519 struct proxy *defpx, const char *file, int line,
1520 char **err)
Emeric Brun97679e72010-09-23 17:56:44 +02001521{
1522 const char *ptr = NULL;
1523 unsigned int val;
Emeric Brun97679e72010-09-23 17:56:44 +02001524 int warn = 0;
1525 int arg;
1526 struct tcp_rule *rule;
Willy Tarreau80aca902013-01-07 15:42:20 +01001527 unsigned int where;
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001528 const struct acl *acl;
Willy Tarreau93fddf12013-03-31 22:59:32 +02001529 const char *kw;
Emeric Brun97679e72010-09-23 17:56:44 +02001530
1531 if (!*args[1]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001532 memprintf(err, "missing argument for '%s' in %s '%s'",
1533 args[0], proxy_type_str(curpx), curpx->id);
Emeric Brun97679e72010-09-23 17:56:44 +02001534 return -1;
1535 }
1536
1537 if (strcmp(args[1], "inspect-delay") == 0) {
1538 if (curpx == defpx || !(curpx->cap & PR_CAP_BE)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001539 memprintf(err, "%s %s is only allowed in 'backend' sections",
1540 args[0], args[1]);
Emeric Brun97679e72010-09-23 17:56:44 +02001541 return -1;
1542 }
1543
1544 if (!*args[2] || (ptr = parse_time_err(args[2], &val, TIME_UNIT_MS))) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001545 memprintf(err,
1546 "'%s %s' expects a positive delay in milliseconds, in %s '%s'",
1547 args[0], args[1], proxy_type_str(curpx), curpx->id);
1548 if (ptr)
1549 memprintf(err, "%s (unexpected character '%c')", *err, *ptr);
Emeric Brun97679e72010-09-23 17:56:44 +02001550 return -1;
1551 }
1552
1553 if (curpx->tcp_rep.inspect_delay) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001554 memprintf(err, "ignoring %s %s (was already defined) in %s '%s'",
1555 args[0], args[1], proxy_type_str(curpx), curpx->id);
Emeric Brun97679e72010-09-23 17:56:44 +02001556 return 1;
1557 }
1558 curpx->tcp_rep.inspect_delay = val;
1559 return 0;
1560 }
1561
Simon Hormande072bd2011-06-24 15:11:37 +09001562 rule = calloc(1, sizeof(*rule));
Emeric Brun97679e72010-09-23 17:56:44 +02001563 LIST_INIT(&rule->list);
1564 arg = 1;
Willy Tarreau80aca902013-01-07 15:42:20 +01001565 where = 0;
Emeric Brun97679e72010-09-23 17:56:44 +02001566
1567 if (strcmp(args[1], "content") == 0) {
1568 arg++;
Willy Tarreau80aca902013-01-07 15:42:20 +01001569
1570 if (curpx->cap & PR_CAP_FE)
1571 where |= SMP_VAL_FE_RES_CNT;
1572 if (curpx->cap & PR_CAP_BE)
1573 where |= SMP_VAL_BE_RES_CNT;
1574
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001575 if (tcp_parse_response_rule(args, arg, section_type, curpx, defpx, rule, err, where, file, line) < 0)
Emeric Brun97679e72010-09-23 17:56:44 +02001576 goto error;
1577
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001578 acl = rule->cond ? acl_cond_conflicts(rule->cond, where) : NULL;
1579 if (acl) {
1580 if (acl->name && *acl->name)
1581 memprintf(err,
1582 "acl '%s' will never match in '%s %s' because it only involves keywords that are incompatible with '%s'",
1583 acl->name, args[0], args[1], sample_ckp_names(where));
1584 else
1585 memprintf(err,
1586 "anonymous acl will never match in '%s %s' because it uses keyword '%s' which is incompatible with '%s'",
1587 args[0], args[1],
Willy Tarreau93fddf12013-03-31 22:59:32 +02001588 LIST_ELEM(acl->expr.n, struct acl_expr *, list)->kw,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001589 sample_ckp_names(where));
Emeric Brun97679e72010-09-23 17:56:44 +02001590
Emeric Brun97679e72010-09-23 17:56:44 +02001591 warn++;
1592 }
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001593 else if (rule->cond && acl_cond_kw_conflicts(rule->cond, where, &acl, &kw)) {
1594 if (acl->name && *acl->name)
1595 memprintf(err,
1596 "acl '%s' involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001597 acl->name, kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001598 else
1599 memprintf(err,
1600 "anonymous acl involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001601 kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001602 warn++;
1603 }
Emeric Brun97679e72010-09-23 17:56:44 +02001604
1605 LIST_ADDQ(&curpx->tcp_rep.inspect_rules, &rule->list);
1606 }
1607 else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001608 memprintf(err,
1609 "'%s' expects 'inspect-delay' or 'content' in %s '%s' (got '%s')",
1610 args[0], proxy_type_str(curpx), curpx->id, args[1]);
Emeric Brun97679e72010-09-23 17:56:44 +02001611 goto error;
1612 }
1613
1614 return warn;
1615 error:
1616 free(rule);
1617 return -1;
1618}
1619
1620
Willy Tarreaub6866442008-07-14 23:54:42 +02001621/* This function should be called to parse a line starting with the "tcp-request"
1622 * keyword.
1623 */
1624static int tcp_parse_tcp_req(char **args, int section_type, struct proxy *curpx,
Willy Tarreau28a47d62012-09-18 20:02:48 +02001625 struct proxy *defpx, const char *file, int line,
1626 char **err)
Willy Tarreaub6866442008-07-14 23:54:42 +02001627{
1628 const char *ptr = NULL;
Willy Tarreauc7e961e2008-08-17 17:13:47 +02001629 unsigned int val;
Willy Tarreau1a687942010-05-23 22:40:30 +02001630 int warn = 0;
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001631 int arg;
Willy Tarreau1a687942010-05-23 22:40:30 +02001632 struct tcp_rule *rule;
Willy Tarreau80aca902013-01-07 15:42:20 +01001633 unsigned int where;
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001634 const struct acl *acl;
Willy Tarreau93fddf12013-03-31 22:59:32 +02001635 const char *kw;
Willy Tarreaub6866442008-07-14 23:54:42 +02001636
1637 if (!*args[1]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001638 if (curpx == defpx)
1639 memprintf(err, "missing argument for '%s' in defaults section", args[0]);
1640 else
1641 memprintf(err, "missing argument for '%s' in %s '%s'",
1642 args[0], proxy_type_str(curpx), curpx->id);
Willy Tarreaub6866442008-07-14 23:54:42 +02001643 return -1;
1644 }
1645
1646 if (!strcmp(args[1], "inspect-delay")) {
1647 if (curpx == defpx) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001648 memprintf(err, "%s %s is not allowed in 'defaults' sections",
1649 args[0], args[1]);
Willy Tarreaub6866442008-07-14 23:54:42 +02001650 return -1;
1651 }
1652
Willy Tarreaub6866442008-07-14 23:54:42 +02001653 if (!*args[2] || (ptr = parse_time_err(args[2], &val, TIME_UNIT_MS))) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001654 memprintf(err,
1655 "'%s %s' expects a positive delay in milliseconds, in %s '%s'",
1656 args[0], args[1], proxy_type_str(curpx), curpx->id);
1657 if (ptr)
1658 memprintf(err, "%s (unexpected character '%c')", *err, *ptr);
Willy Tarreaub6866442008-07-14 23:54:42 +02001659 return -1;
1660 }
1661
1662 if (curpx->tcp_req.inspect_delay) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001663 memprintf(err, "ignoring %s %s (was already defined) in %s '%s'",
1664 args[0], args[1], proxy_type_str(curpx), curpx->id);
Willy Tarreaub6866442008-07-14 23:54:42 +02001665 return 1;
1666 }
1667 curpx->tcp_req.inspect_delay = val;
1668 return 0;
1669 }
1670
Simon Hormande072bd2011-06-24 15:11:37 +09001671 rule = calloc(1, sizeof(*rule));
Willy Tarreaufb024dc2010-08-20 13:35:41 +02001672 LIST_INIT(&rule->list);
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001673 arg = 1;
Willy Tarreau80aca902013-01-07 15:42:20 +01001674 where = 0;
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001675
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001676 if (strcmp(args[1], "content") == 0) {
Willy Tarreaud1f96522010-08-03 19:34:32 +02001677 arg++;
Willy Tarreau80aca902013-01-07 15:42:20 +01001678
1679 if (curpx->cap & PR_CAP_FE)
1680 where |= SMP_VAL_FE_REQ_CNT;
1681 if (curpx->cap & PR_CAP_BE)
1682 where |= SMP_VAL_BE_REQ_CNT;
1683
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001684 if (tcp_parse_request_rule(args, arg, section_type, curpx, defpx, rule, err, where, file, line) < 0)
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001685 goto error;
Willy Tarreaub6866442008-07-14 23:54:42 +02001686
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001687 acl = rule->cond ? acl_cond_conflicts(rule->cond, where) : NULL;
1688 if (acl) {
1689 if (acl->name && *acl->name)
1690 memprintf(err,
1691 "acl '%s' will never match in '%s %s' because it only involves keywords that are incompatible with '%s'",
1692 acl->name, args[0], args[1], sample_ckp_names(where));
1693 else
1694 memprintf(err,
1695 "anonymous acl will never match in '%s %s' because it uses keyword '%s' which is incompatible with '%s'",
1696 args[0], args[1],
Willy Tarreau93fddf12013-03-31 22:59:32 +02001697 LIST_ELEM(acl->expr.n, struct acl_expr *, list)->kw,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001698 sample_ckp_names(where));
Willy Tarreaudd64f8d2008-07-27 22:02:32 +02001699
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001700 warn++;
1701 }
1702 else if (rule->cond && acl_cond_kw_conflicts(rule->cond, where, &acl, &kw)) {
1703 if (acl->name && *acl->name)
1704 memprintf(err,
1705 "acl '%s' involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001706 acl->name, kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001707 else
1708 memprintf(err,
1709 "anonymous acl involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001710 kw, sample_ckp_names(where));
Willy Tarreaudd64f8d2008-07-27 22:02:32 +02001711 warn++;
1712 }
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001713
Willy Tarreau8b3c8082014-09-16 15:39:51 +02001714 /* the following function directly emits the warning */
1715 warnif_misplaced_tcp_cont(curpx, file, line, args[0]);
Willy Tarreaufb024dc2010-08-20 13:35:41 +02001716 LIST_ADDQ(&curpx->tcp_req.inspect_rules, &rule->list);
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001717 }
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001718 else if (strcmp(args[1], "connection") == 0) {
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001719 arg++;
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001720
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001721 if (!(curpx->cap & PR_CAP_FE)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001722 memprintf(err, "%s %s is not allowed because %s %s is not a frontend",
1723 args[0], args[1], proxy_type_str(curpx), curpx->id);
Simon Horman6c54d8b2011-07-15 13:14:06 +09001724 goto error;
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001725 }
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001726
Willy Tarreau80aca902013-01-07 15:42:20 +01001727 where |= SMP_VAL_FE_CON_ACC;
1728
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001729 if (tcp_parse_request_rule(args, arg, section_type, curpx, defpx, rule, err, where, file, line) < 0)
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001730 goto error;
1731
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001732 acl = rule->cond ? acl_cond_conflicts(rule->cond, where) : NULL;
1733 if (acl) {
1734 if (acl->name && *acl->name)
1735 memprintf(err,
1736 "acl '%s' will never match in '%s %s' because it only involves keywords that are incompatible with '%s'",
1737 acl->name, args[0], args[1], sample_ckp_names(where));
1738 else
1739 memprintf(err,
1740 "anonymous acl will never match in '%s %s' because it uses keyword '%s' which is incompatible with '%s'",
1741 args[0], args[1],
Willy Tarreau93fddf12013-03-31 22:59:32 +02001742 LIST_ELEM(acl->expr.n, struct acl_expr *, list)->kw,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001743 sample_ckp_names(where));
Willy Tarreauf059a0f2010-08-03 16:29:52 +02001744
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001745 warn++;
1746 }
1747 else if (rule->cond && acl_cond_kw_conflicts(rule->cond, where, &acl, &kw)) {
1748 if (acl->name && *acl->name)
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001749 memprintf(err,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001750 "acl '%s' involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001751 acl->name, kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001752 else
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001753 memprintf(err,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001754 "anonymous acl involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001755 kw, sample_ckp_names(where));
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001756 warn++;
1757 }
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001758
Willy Tarreau8b3c8082014-09-16 15:39:51 +02001759 /* the following function directly emits the warning */
1760 warnif_misplaced_tcp_conn(curpx, file, line, args[0]);
Willy Tarreaufb024dc2010-08-20 13:35:41 +02001761 LIST_ADDQ(&curpx->tcp_req.l4_rules, &rule->list);
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001762 }
Willy Tarreau1a687942010-05-23 22:40:30 +02001763 else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001764 if (curpx == defpx)
1765 memprintf(err,
1766 "'%s' expects 'inspect-delay', 'connection', or 'content' in defaults section (got '%s')",
1767 args[0], args[1]);
1768 else
1769 memprintf(err,
1770 "'%s' expects 'inspect-delay', 'connection', or 'content' in %s '%s' (got '%s')",
Willy Tarreaudeaec2f2013-04-10 16:31:11 +02001771 args[0], proxy_type_str(curpx), curpx->id, args[1]);
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001772 goto error;
Willy Tarreau1a687942010-05-23 22:40:30 +02001773 }
1774
Willy Tarreau1a687942010-05-23 22:40:30 +02001775 return warn;
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001776 error:
1777 free(rule);
1778 return -1;
Willy Tarreaub6866442008-07-14 23:54:42 +02001779}
1780
Willy Tarreau645513a2010-05-24 20:55:15 +02001781
1782/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001783/* All supported sample fetch functions must be declared here */
Willy Tarreau32389b72012-04-23 23:13:20 +02001784/************************************************************************/
1785
Willy Tarreau4a129812012-04-25 17:31:42 +02001786/* fetch the connection's source IPv4/IPv6 address */
Willy Tarreau645513a2010-05-24 20:55:15 +02001787static int
Willy Tarreau4a129812012-04-25 17:31:42 +02001788smp_fetch_src(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
Willy Tarreauef38c392013-07-22 16:29:32 +02001789 const struct arg *args, struct sample *smp, const char *kw)
Willy Tarreau645513a2010-05-24 20:55:15 +02001790{
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001791 struct connection *cli_conn = objt_conn(l4->si[0].end);
1792
1793 if (!cli_conn)
1794 return 0;
1795
1796 switch (cli_conn->addr.from.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001797 case AF_INET:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001798 smp->data.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr;
Willy Tarreauf853c462012-04-23 18:53:56 +02001799 smp->type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001800 break;
1801 case AF_INET6:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001802 smp->data.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_addr;
Willy Tarreauf853c462012-04-23 18:53:56 +02001803 smp->type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001804 break;
1805 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001806 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001807 }
Emeric Brunf769f512010-10-22 17:14:01 +02001808
Willy Tarreau37406352012-04-23 16:16:37 +02001809 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001810 return 1;
1811}
1812
Willy Tarreaua5e37562011-12-16 17:06:15 +01001813/* set temp integer to the connection's source port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001814static int
Willy Tarreau25c1ebc2012-04-25 16:21:44 +02001815smp_fetch_sport(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
Willy Tarreauef38c392013-07-22 16:29:32 +02001816 const struct arg *args, struct sample *smp, const char *kw)
Willy Tarreau645513a2010-05-24 20:55:15 +02001817{
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001818 struct connection *cli_conn = objt_conn(l4->si[0].end);
1819
1820 if (!cli_conn)
1821 return 0;
1822
Willy Tarreauf853c462012-04-23 18:53:56 +02001823 smp->type = SMP_T_UINT;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001824 if (!(smp->data.uint = get_host_port(&cli_conn->addr.from)))
Emeric Brunf769f512010-10-22 17:14:01 +02001825 return 0;
1826
Willy Tarreau37406352012-04-23 16:16:37 +02001827 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001828 return 1;
1829}
1830
Willy Tarreau4a129812012-04-25 17:31:42 +02001831/* fetch the connection's destination IPv4/IPv6 address */
Willy Tarreau645513a2010-05-24 20:55:15 +02001832static int
Willy Tarreau4a129812012-04-25 17:31:42 +02001833smp_fetch_dst(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
Willy Tarreauef38c392013-07-22 16:29:32 +02001834 const struct arg *args, struct sample *smp, const char *kw)
Willy Tarreau645513a2010-05-24 20:55:15 +02001835{
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001836 struct connection *cli_conn = objt_conn(l4->si[0].end);
Willy Tarreau645513a2010-05-24 20:55:15 +02001837
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001838 if (!cli_conn)
1839 return 0;
1840
1841 conn_get_to_addr(cli_conn);
1842
1843 switch (cli_conn->addr.to.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001844 case AF_INET:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001845 smp->data.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
Willy Tarreauf853c462012-04-23 18:53:56 +02001846 smp->type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001847 break;
1848 case AF_INET6:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001849 smp->data.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_addr;
Willy Tarreauf853c462012-04-23 18:53:56 +02001850 smp->type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001851 break;
1852 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001853 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001854 }
Emeric Brunf769f512010-10-22 17:14:01 +02001855
Willy Tarreau37406352012-04-23 16:16:37 +02001856 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001857 return 1;
1858}
1859
Willy Tarreaua5e37562011-12-16 17:06:15 +01001860/* set temp integer to the frontend connexion's destination port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001861static int
Willy Tarreau25c1ebc2012-04-25 16:21:44 +02001862smp_fetch_dport(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
Willy Tarreauef38c392013-07-22 16:29:32 +02001863 const struct arg *args, struct sample *smp, const char *kw)
Willy Tarreau645513a2010-05-24 20:55:15 +02001864{
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001865 struct connection *cli_conn = objt_conn(l4->si[0].end);
1866
1867 if (!cli_conn)
1868 return 0;
1869
1870 conn_get_to_addr(cli_conn);
Willy Tarreau645513a2010-05-24 20:55:15 +02001871
Willy Tarreauf853c462012-04-23 18:53:56 +02001872 smp->type = SMP_T_UINT;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001873 if (!(smp->data.uint = get_host_port(&cli_conn->addr.to)))
Emeric Brunf769f512010-10-22 17:14:01 +02001874 return 0;
1875
Willy Tarreau37406352012-04-23 16:16:37 +02001876 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001877 return 1;
Emericf2d7cae2010-11-05 18:13:50 +01001878}
1879
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001880#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001881/* parse the "v4v6" bind keyword */
1882static int bind_parse_v4v6(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1883{
1884 struct listener *l;
1885
1886 list_for_each_entry(l, &conf->listeners, by_bind) {
1887 if (l->addr.ss_family == AF_INET6)
1888 l->options |= LI_O_V4V6;
1889 }
1890
1891 return 0;
1892}
1893
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001894/* parse the "v6only" bind keyword */
1895static int bind_parse_v6only(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1896{
1897 struct listener *l;
1898
1899 list_for_each_entry(l, &conf->listeners, by_bind) {
1900 if (l->addr.ss_family == AF_INET6)
1901 l->options |= LI_O_V6ONLY;
1902 }
1903
1904 return 0;
1905}
1906#endif
1907
Pieter Baauwd551fb52013-05-08 22:49:23 +02001908#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001909/* parse the "transparent" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001910static 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 +02001911{
1912 struct listener *l;
1913
Willy Tarreau4348fad2012-09-20 16:48:07 +02001914 list_for_each_entry(l, &conf->listeners, by_bind) {
1915 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1916 l->options |= LI_O_FOREIGN;
Willy Tarreau44791242012-09-12 23:27:21 +02001917 }
1918
Willy Tarreau44791242012-09-12 23:27:21 +02001919 return 0;
1920}
1921#endif
1922
1923#ifdef TCP_DEFER_ACCEPT
1924/* parse the "defer-accept" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001925static 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 +02001926{
1927 struct listener *l;
1928
Willy Tarreau4348fad2012-09-20 16:48:07 +02001929 list_for_each_entry(l, &conf->listeners, by_bind) {
1930 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1931 l->options |= LI_O_DEF_ACCEPT;
Willy Tarreau44791242012-09-12 23:27:21 +02001932 }
1933
Willy Tarreau44791242012-09-12 23:27:21 +02001934 return 0;
1935}
1936#endif
1937
Willy Tarreau1c862c52012-10-05 16:21:00 +02001938#ifdef TCP_FASTOPEN
Lukas Tribus0defb902013-02-13 23:35:39 +01001939/* parse the "tfo" bind keyword */
Willy Tarreau1c862c52012-10-05 16:21:00 +02001940static int bind_parse_tfo(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1941{
1942 struct listener *l;
1943
1944 list_for_each_entry(l, &conf->listeners, by_bind) {
1945 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1946 l->options |= LI_O_TCP_FO;
1947 }
1948
1949 return 0;
1950}
1951#endif
1952
Willy Tarreau44791242012-09-12 23:27:21 +02001953#ifdef TCP_MAXSEG
1954/* parse the "mss" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001955static 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 +02001956{
1957 struct listener *l;
1958 int mss;
1959
Willy Tarreau44791242012-09-12 23:27:21 +02001960 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001961 memprintf(err, "'%s' : missing MSS value", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001962 return ERR_ALERT | ERR_FATAL;
1963 }
1964
1965 mss = atoi(args[cur_arg + 1]);
1966 if (!mss || abs(mss) > 65535) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001967 memprintf(err, "'%s' : expects an MSS with and absolute value between 1 and 65535", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001968 return ERR_ALERT | ERR_FATAL;
1969 }
1970
Willy Tarreau4348fad2012-09-20 16:48:07 +02001971 list_for_each_entry(l, &conf->listeners, by_bind) {
1972 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1973 l->maxseg = mss;
1974 }
Willy Tarreau44791242012-09-12 23:27:21 +02001975
1976 return 0;
1977}
1978#endif
1979
1980#ifdef SO_BINDTODEVICE
1981/* parse the "mss" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001982static 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 +02001983{
1984 struct listener *l;
1985
Willy Tarreau44791242012-09-12 23:27:21 +02001986 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001987 memprintf(err, "'%s' : missing interface name", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001988 return ERR_ALERT | ERR_FATAL;
1989 }
1990
Willy Tarreau4348fad2012-09-20 16:48:07 +02001991 list_for_each_entry(l, &conf->listeners, by_bind) {
1992 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1993 l->interface = strdup(args[cur_arg + 1]);
1994 }
Willy Tarreau44791242012-09-12 23:27:21 +02001995
1996 global.last_checks |= LSTCHK_NETADM;
1997 return 0;
1998}
1999#endif
2000
Willy Tarreaudc13c112013-06-21 23:16:39 +02002001static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002002 { CFG_LISTEN, "tcp-request", tcp_parse_tcp_req },
Emeric Brun97679e72010-09-23 17:56:44 +02002003 { CFG_LISTEN, "tcp-response", tcp_parse_tcp_rep },
Willy Tarreaub6866442008-07-14 23:54:42 +02002004 { 0, NULL, NULL },
2005}};
2006
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002007
Willy Tarreau61612d42012-04-19 18:42:05 +02002008/* Note: must not be declared <const> as its list will be overwritten.
2009 * Please take care of keeping this list alphabetically sorted.
2010 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002011static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002012 { /* END */ },
Willy Tarreaub6866442008-07-14 23:54:42 +02002013}};
2014
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002015
Willy Tarreau4a129812012-04-25 17:31:42 +02002016/* Note: must not be declared <const> as its list will be overwritten.
2017 * Note: fetches that may return multiple types must be declared as the lowest
2018 * common denominator, the type that can be casted into all other ones. For
2019 * instance v4/v6 must be declared v4.
2020 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002021static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002022 { "dst", smp_fetch_dst, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
2023 { "dst_port", smp_fetch_dport, 0, NULL, SMP_T_UINT, SMP_USE_L4CLI },
2024 { "src", smp_fetch_src, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
2025 { "src_port", smp_fetch_sport, 0, NULL, SMP_T_UINT, SMP_USE_L4CLI },
2026 { /* END */ },
Willy Tarreau645513a2010-05-24 20:55:15 +02002027}};
2028
Willy Tarreau44791242012-09-12 23:27:21 +02002029/************************************************************************/
2030/* All supported bind keywords must be declared here. */
2031/************************************************************************/
2032
2033/* Note: must not be declared <const> as its list will be overwritten.
2034 * Please take care of keeping this list alphabetically sorted, doing so helps
2035 * all code contributors.
2036 * Optional keywords are also declared with a NULL ->parse() function so that
2037 * the config parser can report an appropriate error when a known keyword was
2038 * not enabled.
2039 */
Willy Tarreau51fb7652012-09-18 18:24:39 +02002040static struct bind_kw_list bind_kws = { "TCP", { }, {
Willy Tarreau44791242012-09-12 23:27:21 +02002041#ifdef TCP_DEFER_ACCEPT
2042 { "defer-accept", bind_parse_defer_accept, 0 }, /* wait for some data for 1 second max before doing accept */
2043#endif
2044#ifdef SO_BINDTODEVICE
2045 { "interface", bind_parse_interface, 1 }, /* specifically bind to this interface */
2046#endif
2047#ifdef TCP_MAXSEG
2048 { "mss", bind_parse_mss, 1 }, /* set MSS of listening socket */
2049#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +02002050#ifdef TCP_FASTOPEN
2051 { "tfo", bind_parse_tfo, 0 }, /* enable TCP_FASTOPEN of listening socket */
2052#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +02002053#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02002054 { "transparent", bind_parse_transparent, 0 }, /* transparently bind to the specified addresses */
2055#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +01002056#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01002057 { "v4v6", bind_parse_v4v6, 0 }, /* force socket to bind to IPv4+IPv6 */
Willy Tarreau9b6700f2012-11-24 11:55:28 +01002058 { "v6only", bind_parse_v6only, 0 }, /* force socket to bind to IPv6 only */
2059#endif
Willy Tarreau44791242012-09-12 23:27:21 +02002060 /* the versions with the NULL parse function*/
2061 { "defer-accept", NULL, 0 },
2062 { "interface", NULL, 1 },
2063 { "mss", NULL, 1 },
2064 { "transparent", NULL, 0 },
Willy Tarreau77e3af92012-11-24 15:07:23 +01002065 { "v4v6", NULL, 0 },
Willy Tarreau9b6700f2012-11-24 11:55:28 +01002066 { "v6only", NULL, 0 },
Willy Tarreau44791242012-09-12 23:27:21 +02002067 { NULL, NULL, 0 },
2068}};
2069
Willy Tarreaue6b98942007-10-29 01:09:36 +01002070__attribute__((constructor))
2071static void __tcp_protocol_init(void)
2072{
2073 protocol_register(&proto_tcpv4);
2074 protocol_register(&proto_tcpv6);
Willy Tarreau12785782012-04-27 21:37:17 +02002075 sample_register_fetches(&sample_fetch_keywords);
Willy Tarreaub6866442008-07-14 23:54:42 +02002076 cfg_register_keywords(&cfg_kws);
2077 acl_register_keywords(&acl_kws);
Willy Tarreau44791242012-09-12 23:27:21 +02002078 bind_register_keywords(&bind_kws);
Willy Tarreaue6b98942007-10-29 01:09:36 +01002079}
2080
2081
2082/*
2083 * Local variables:
2084 * c-indent-level: 8
2085 * c-basic-offset: 8
2086 * End:
2087 */