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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>
Willy Tarreau2d392c22015-08-24 01:43:45 +020028#include <netinet/in.h>
29#include <netinet/ip.h>
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040030
Willy Tarreaub6866442008-07-14 23:54:42 +020031#include <common/cfgparse.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010032#include <common/compat.h>
33#include <common/config.h>
34#include <common/debug.h>
35#include <common/errors.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010036#include <common/mini-clist.h>
37#include <common/standard.h>
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +010038#include <common/namespace.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010039
Willy Tarreaue6b98942007-10-29 01:09:36 +010040#include <types/global.h>
Willy Tarreau18bf01e2014-06-13 16:18:52 +020041#include <types/capture.h>
Willy Tarreau2d392c22015-08-24 01:43:45 +020042#include <types/connection.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010043
44#include <proto/acl.h>
Thierry FOURNIER322a1242015-08-19 09:07:47 +020045#include <proto/action.h>
Willy Tarreau9fcb9842012-04-20 14:45:49 +020046#include <proto/arg.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020047#include <proto/channel.h>
Willy Tarreaud2274c62012-07-06 14:29:45 +020048#include <proto/connection.h>
Willy Tarreaudd2f85e2012-09-02 22:34:23 +020049#include <proto/fd.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020050#include <proto/listener.h>
Willy Tarreau9650f372009-08-16 14:02:45 +020051#include <proto/log.h>
52#include <proto/port_range.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020053#include <proto/protocol.h>
Willy Tarreau2d392c22015-08-24 01:43:45 +020054#include <proto/proto_http.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010055#include <proto/proto_tcp.h>
Willy Tarreaub6866442008-07-14 23:54:42 +020056#include <proto/proxy.h>
Willy Tarreaucd3b0942012-04-27 21:52:18 +020057#include <proto/sample.h>
Willy Tarreau163d4622015-10-13 16:16:41 +020058#include <proto/server.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020059#include <proto/stream.h>
Willy Tarreaua975b8f2010-06-05 19:13:27 +020060#include <proto/stick_table.h>
Willy Tarreaucc1e04b2013-09-11 23:20:29 +020061#include <proto/stream_interface.h>
Willy Tarreaua975b8f2010-06-05 19:13:27 +020062#include <proto/task.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010063
Emeric Bruncf20bf12010-10-22 16:06:11 +020064static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen);
65static int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen);
Willy Tarreaue6b98942007-10-29 01:09:36 +010066
Thierry FOURNIERcc87a112014-12-12 19:41:33 +010067/* List head of all known action keywords for "tcp-request connection" */
68struct list tcp_req_conn_keywords = LIST_HEAD_INIT(tcp_req_conn_keywords);
69struct list tcp_req_cont_keywords = LIST_HEAD_INIT(tcp_req_cont_keywords);
70struct list tcp_res_cont_keywords = LIST_HEAD_INIT(tcp_res_cont_keywords);
71
Willy Tarreaue6b98942007-10-29 01:09:36 +010072/* Note: must not be declared <const> as its list will be overwritten */
73static struct protocol proto_tcpv4 = {
74 .name = "tcpv4",
75 .sock_domain = AF_INET,
76 .sock_type = SOCK_STREAM,
77 .sock_prot = IPPROTO_TCP,
78 .sock_family = AF_INET,
79 .sock_addrlen = sizeof(struct sockaddr_in),
80 .l3_addrlen = 32/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +020081 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +020082 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +020083 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010084 .bind_all = tcp_bind_listeners,
85 .unbind_all = unbind_all_listeners,
86 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +020087 .get_src = tcp_get_src,
88 .get_dst = tcp_get_dst,
Willy Tarreau2b57cb82013-06-10 19:56:38 +020089 .drain = tcp_drain,
Willy Tarreau092d8652014-07-07 20:22:12 +020090 .pause = tcp_pause_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010091 .listeners = LIST_HEAD_INIT(proto_tcpv4.listeners),
92 .nb_listeners = 0,
93};
94
95/* Note: must not be declared <const> as its list will be overwritten */
96static struct protocol proto_tcpv6 = {
97 .name = "tcpv6",
98 .sock_domain = AF_INET6,
99 .sock_type = SOCK_STREAM,
100 .sock_prot = IPPROTO_TCP,
101 .sock_family = AF_INET6,
102 .sock_addrlen = sizeof(struct sockaddr_in6),
103 .l3_addrlen = 128/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +0200104 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +0200105 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +0200106 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100107 .bind_all = tcp_bind_listeners,
108 .unbind_all = unbind_all_listeners,
109 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +0200110 .get_src = tcp_get_src,
111 .get_dst = tcp_get_dst,
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200112 .drain = tcp_drain,
Willy Tarreau092d8652014-07-07 20:22:12 +0200113 .pause = tcp_pause_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100114 .listeners = LIST_HEAD_INIT(proto_tcpv6.listeners),
115 .nb_listeners = 0,
116};
117
Thierry FOURNIERcc87a112014-12-12 19:41:33 +0100118/*
119 * Register keywords.
120 */
Thierry FOURNIER36481b82015-08-19 09:01:53 +0200121void tcp_req_conn_keywords_register(struct action_kw_list *kw_list)
Thierry FOURNIERcc87a112014-12-12 19:41:33 +0100122{
123 LIST_ADDQ(&tcp_req_conn_keywords, &kw_list->list);
124}
125
Thierry FOURNIER36481b82015-08-19 09:01:53 +0200126void tcp_req_cont_keywords_register(struct action_kw_list *kw_list)
Thierry FOURNIERcc87a112014-12-12 19:41:33 +0100127{
128 LIST_ADDQ(&tcp_req_cont_keywords, &kw_list->list);
129}
130
Thierry FOURNIER36481b82015-08-19 09:01:53 +0200131void tcp_res_cont_keywords_register(struct action_kw_list *kw_list)
Thierry FOURNIERcc87a112014-12-12 19:41:33 +0100132{
133 LIST_ADDQ(&tcp_res_cont_keywords, &kw_list->list);
134}
135
136/*
137 * Return the struct http_req_action_kw associated to a keyword.
138 */
Thierry FOURNIER36481b82015-08-19 09:01:53 +0200139static struct action_kw *tcp_req_conn_action(const char *kw)
Thierry FOURNIERcc87a112014-12-12 19:41:33 +0100140{
Thierry FOURNIER322a1242015-08-19 09:07:47 +0200141 return action_lookup(&tcp_req_conn_keywords, kw);
Thierry FOURNIERcc87a112014-12-12 19:41:33 +0100142}
143
Thierry FOURNIER36481b82015-08-19 09:01:53 +0200144static struct action_kw *tcp_req_cont_action(const char *kw)
Thierry FOURNIERcc87a112014-12-12 19:41:33 +0100145{
Thierry FOURNIER322a1242015-08-19 09:07:47 +0200146 return action_lookup(&tcp_req_cont_keywords, kw);
Thierry FOURNIERcc87a112014-12-12 19:41:33 +0100147}
148
Thierry FOURNIER36481b82015-08-19 09:01:53 +0200149static struct action_kw *tcp_res_cont_action(const char *kw)
Thierry FOURNIERcc87a112014-12-12 19:41:33 +0100150{
Thierry FOURNIER322a1242015-08-19 09:07:47 +0200151 return action_lookup(&tcp_res_cont_keywords, kw);
Thierry FOURNIERcc87a112014-12-12 19:41:33 +0100152}
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100153
David du Colombier6f5ccb12011-03-10 22:26:24 +0100154/* Binds ipv4/ipv6 address <local> to socket <fd>, unless <flags> is set, in which
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100155 * case we try to bind <remote>. <flags> is a 2-bit field consisting of :
156 * - 0 : ignore remote address (may even be a NULL pointer)
157 * - 1 : use provided address
158 * - 2 : use provided port
159 * - 3 : use both
160 *
161 * The function supports multiple foreign binding methods :
162 * - linux_tproxy: we directly bind to the foreign address
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100163 * The second one can be used as a fallback for the first one.
164 * This function returns 0 when everything's OK, 1 if it could not bind, to the
165 * local address, 2 if it could not bind to the foreign address.
166 */
David du Colombier6f5ccb12011-03-10 22:26:24 +0100167int tcp_bind_socket(int fd, int flags, struct sockaddr_storage *local, struct sockaddr_storage *remote)
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100168{
David du Colombier6f5ccb12011-03-10 22:26:24 +0100169 struct sockaddr_storage bind_addr;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100170 int foreign_ok = 0;
171 int ret;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100172 static int ip_transp_working = 1;
David du Colombier65c17962012-07-13 14:34:59 +0200173 static int ip6_transp_working = 1;
Pieter Baauwd551fb52013-05-08 22:49:23 +0200174
David du Colombier65c17962012-07-13 14:34:59 +0200175 switch (local->ss_family) {
176 case AF_INET:
177 if (flags && ip_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200178 /* This deserves some explanation. Some platforms will support
179 * multiple combinations of certain methods, so we try the
180 * supported ones until one succeeds.
181 */
182 if (0
183#if defined(IP_TRANSPARENT)
184 || (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == 0)
185#endif
186#if defined(IP_FREEBIND)
187 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
188#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200189#if defined(IP_BINDANY)
190 || (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == 0)
191#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200192#if defined(SO_BINDANY)
193 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
194#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200195 )
David du Colombier65c17962012-07-13 14:34:59 +0200196 foreign_ok = 1;
197 else
198 ip_transp_working = 0;
199 }
200 break;
201 case AF_INET6:
202 if (flags && ip6_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200203 if (0
204#if defined(IPV6_TRANSPARENT)
205 || (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == 0)
206#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100207#if defined(IP_FREEBIND)
208 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
209#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200210#if defined(IPV6_BINDANY)
211 || (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == 0)
212#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200213#if defined(SO_BINDANY)
214 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
215#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200216 )
David du Colombier65c17962012-07-13 14:34:59 +0200217 foreign_ok = 1;
218 else
219 ip6_transp_working = 0;
220 }
221 break;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100222 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200223
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100224 if (flags) {
225 memset(&bind_addr, 0, sizeof(bind_addr));
Willy Tarreau96dd0792011-04-19 07:20:57 +0200226 bind_addr.ss_family = remote->ss_family;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100227 switch (remote->ss_family) {
228 case AF_INET:
229 if (flags & 1)
230 ((struct sockaddr_in *)&bind_addr)->sin_addr = ((struct sockaddr_in *)remote)->sin_addr;
231 if (flags & 2)
232 ((struct sockaddr_in *)&bind_addr)->sin_port = ((struct sockaddr_in *)remote)->sin_port;
233 break;
234 case AF_INET6:
235 if (flags & 1)
236 ((struct sockaddr_in6 *)&bind_addr)->sin6_addr = ((struct sockaddr_in6 *)remote)->sin6_addr;
237 if (flags & 2)
238 ((struct sockaddr_in6 *)&bind_addr)->sin6_port = ((struct sockaddr_in6 *)remote)->sin6_port;
239 break;
Willy Tarreau5dc1e982011-12-16 21:25:11 +0100240 default:
241 /* we don't want to try to bind to an unknown address family */
242 foreign_ok = 0;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100243 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100244 }
245
Simon Hormande072bd2011-06-24 15:11:37 +0900246 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100247 if (foreign_ok) {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200248 if (is_inet_addr(&bind_addr)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200249 ret = bind(fd, (struct sockaddr *)&bind_addr, get_addr_len(&bind_addr));
250 if (ret < 0)
251 return 2;
252 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100253 }
254 else {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200255 if (is_inet_addr(local)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200256 ret = bind(fd, (struct sockaddr *)local, get_addr_len(local));
257 if (ret < 0)
258 return 1;
259 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100260 }
261
262 if (!flags)
263 return 0;
264
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100265 if (!foreign_ok)
266 /* we could not bind to a foreign address */
267 return 2;
268
269 return 0;
270}
Willy Tarreaue6b98942007-10-29 01:09:36 +0100271
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100272static int create_server_socket(struct connection *conn)
273{
Willy Tarreau529c1392014-12-24 13:47:55 +0100274 const struct netns_entry *ns = NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100275
Willy Tarreau529c1392014-12-24 13:47:55 +0100276#ifdef CONFIG_HAP_NS
277 if (objt_server(conn->target)) {
278 if (__objt_server(conn->target)->flags & SRV_F_USE_NS_FROM_PP)
279 ns = conn->proxy_netns;
280 else
281 ns = __objt_server(conn->target)->netns;
282 }
283#endif
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100284 return my_socketat(ns, conn->addr.to.ss_family, SOCK_STREAM, IPPROTO_TCP);
285}
Willy Tarreau9650f372009-08-16 14:02:45 +0200286
287/*
Willy Tarreau14f8e862012-08-30 22:23:13 +0200288 * This function initiates a TCP connection establishment to the target assigned
289 * to connection <conn> using (si->{target,addr.to}). A source address may be
290 * pointed to by conn->addr.from in case of transparent proxying. Normal source
291 * bind addresses are still determined locally (due to the possible need of a
292 * source port). conn->target may point either to a valid server or to a backend,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100293 * depending on conn->target. Only OBJ_TYPE_PROXY and OBJ_TYPE_SERVER are
Willy Tarreauf0837b22012-11-24 10:24:27 +0100294 * supported. The <data> parameter is a boolean indicating whether there are data
295 * waiting for being sent or not, in order to adjust data write polling and on
296 * some platforms, the ability to avoid an empty initial ACK. The <delack> argument
297 * allows the caller to force using a delayed ACK when establishing the connection :
298 * - 0 = no delayed ACK unless data are advertised and backend has tcp-smart-connect
299 * - 1 = delayed ACK if backend has tcp-smart-connect, regardless of data
300 * - 2 = delayed ACK regardless of backend options
Willy Tarreaub1d67742010-03-29 19:36:59 +0200301 *
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200302 * Note that a pending send_proxy message accounts for data.
303 *
Willy Tarreau9650f372009-08-16 14:02:45 +0200304 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +0200305 * - SF_ERR_NONE if everything's OK
306 * - SF_ERR_SRVTO if there are no more servers
307 * - SF_ERR_SRVCL if the connection was refused by the server
308 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
309 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
310 * - SF_ERR_INTERNAL for any other purely internal errors
311 * Additionnally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100312 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200313 * The connection's fd is inserted only when SF_ERR_NONE is returned, otherwise
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100314 * it's invalid and the caller has nothing to do.
Willy Tarreau9650f372009-08-16 14:02:45 +0200315 */
Willy Tarreauf1536862011-03-03 18:27:32 +0100316
Willy Tarreauf0837b22012-11-24 10:24:27 +0100317int tcp_connect_server(struct connection *conn, int data, int delack)
Willy Tarreau9650f372009-08-16 14:02:45 +0200318{
319 int fd;
Willy Tarreauac825402011-03-04 22:04:29 +0100320 struct server *srv;
321 struct proxy *be;
Willy Tarreaua4380b42012-12-08 22:49:11 +0100322 struct conn_src *src;
Willy Tarreauac825402011-03-04 22:04:29 +0100323
Willy Tarreau9ce70132014-01-24 16:08:19 +0100324 conn->flags = CO_FL_WAIT_L4_CONN; /* connection in progress */
325
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100326 switch (obj_type(conn->target)) {
327 case OBJ_TYPE_PROXY:
328 be = objt_proxy(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100329 srv = NULL;
330 break;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100331 case OBJ_TYPE_SERVER:
332 srv = objt_server(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100333 be = srv->proxy;
334 break;
335 default:
Willy Tarreau9ce70132014-01-24 16:08:19 +0100336 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200337 return SF_ERR_INTERNAL;
Willy Tarreauac825402011-03-04 22:04:29 +0100338 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200339
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100340 fd = conn->t.sock.fd = create_server_socket(conn);
341
342 if (fd == -1) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200343 qfprintf(stderr, "Cannot get a server socket.\n");
344
Willy Tarreau9ce70132014-01-24 16:08:19 +0100345 if (errno == ENFILE) {
346 conn->err_code = CO_ER_SYS_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200347 send_log(be, LOG_EMERG,
348 "Proxy %s reached system FD limit at %d. Please check system tunables.\n",
349 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100350 }
351 else if (errno == EMFILE) {
352 conn->err_code = CO_ER_PROC_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200353 send_log(be, LOG_EMERG,
354 "Proxy %s reached process FD limit at %d. Please check 'ulimit-n' and restart.\n",
355 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100356 }
357 else if (errno == ENOBUFS || errno == ENOMEM) {
358 conn->err_code = CO_ER_SYS_MEMLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200359 send_log(be, LOG_EMERG,
360 "Proxy %s reached system memory limit at %d sockets. Please check system tunables.\n",
361 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100362 }
363 else if (errno == EAFNOSUPPORT || errno == EPROTONOSUPPORT) {
364 conn->err_code = CO_ER_NOPROTO;
365 }
366 else
367 conn->err_code = CO_ER_SOCK_ERR;
368
Willy Tarreau9650f372009-08-16 14:02:45 +0200369 /* this is a resource error */
Willy Tarreau9ce70132014-01-24 16:08:19 +0100370 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200371 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200372 }
373
374 if (fd >= global.maxsock) {
375 /* do not log anything there, it's a normal condition when this option
376 * is used to serialize connections to a server !
377 */
378 Alert("socket(): not enough free sockets. Raise -n argument. Giving up.\n");
379 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100380 conn->err_code = CO_ER_CONF_FDLIM;
381 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200382 return SF_ERR_PRXCOND; /* it is a configuration limit */
Willy Tarreau9650f372009-08-16 14:02:45 +0200383 }
384
385 if ((fcntl(fd, F_SETFL, O_NONBLOCK)==-1) ||
Simon Hormande072bd2011-06-24 15:11:37 +0900386 (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one)) == -1)) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200387 qfprintf(stderr,"Cannot set client socket to non blocking mode.\n");
388 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100389 conn->err_code = CO_ER_SOCK_ERR;
390 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200391 return SF_ERR_INTERNAL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200392 }
393
394 if (be->options & PR_O_TCP_SRV_KA)
Simon Hormande072bd2011-06-24 15:11:37 +0900395 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one));
Willy Tarreau9650f372009-08-16 14:02:45 +0200396
Willy Tarreau9650f372009-08-16 14:02:45 +0200397 /* allow specific binding :
398 * - server-specific at first
399 * - proxy-specific next
400 */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100401 if (srv && srv->conn_src.opts & CO_SRC_BIND)
402 src = &srv->conn_src;
403 else if (be->conn_src.opts & CO_SRC_BIND)
404 src = &be->conn_src;
405 else
406 src = NULL;
407
408 if (src) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200409 int ret, flags = 0;
410
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200411 if (is_inet_addr(&conn->addr.from)) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100412 switch (src->opts & CO_SRC_TPROXY_MASK) {
Willy Tarreauef9a3602012-12-08 22:29:20 +0100413 case CO_SRC_TPROXY_CLI:
Willy Tarreau387ebf82015-08-04 19:24:13 +0200414 conn->flags |= CO_FL_PRIVATE;
415 /* fall through */
416 case CO_SRC_TPROXY_ADDR:
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200417 flags = 3;
418 break;
Willy Tarreauef9a3602012-12-08 22:29:20 +0100419 case CO_SRC_TPROXY_CIP:
420 case CO_SRC_TPROXY_DYN:
Willy Tarreau387ebf82015-08-04 19:24:13 +0200421 conn->flags |= CO_FL_PRIVATE;
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200422 flags = 1;
423 break;
424 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200425 }
Willy Tarreaub1d67742010-03-29 19:36:59 +0200426
Willy Tarreau9650f372009-08-16 14:02:45 +0200427#ifdef SO_BINDTODEVICE
428 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100429 if (src->iface_name)
430 setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, src->iface_name, src->iface_len + 1);
Willy Tarreau9650f372009-08-16 14:02:45 +0200431#endif
432
Willy Tarreaua4380b42012-12-08 22:49:11 +0100433 if (src->sport_range) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200434 int attempts = 10; /* should be more than enough to find a spare port */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100435 struct sockaddr_storage sa;
Willy Tarreau9650f372009-08-16 14:02:45 +0200436
437 ret = 1;
Willy Tarreaua4380b42012-12-08 22:49:11 +0100438 sa = src->source_addr;
Willy Tarreau9650f372009-08-16 14:02:45 +0200439
440 do {
441 /* note: in case of retry, we may have to release a previously
442 * allocated port, hence this loop's construct.
443 */
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200444 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
445 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200446
447 if (!attempts)
448 break;
449 attempts--;
450
Willy Tarreaua4380b42012-12-08 22:49:11 +0100451 fdinfo[fd].local_port = port_range_alloc_port(src->sport_range);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100452 if (!fdinfo[fd].local_port) {
453 conn->err_code = CO_ER_PORT_RANGE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200454 break;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100455 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200456
Willy Tarreaua4380b42012-12-08 22:49:11 +0100457 fdinfo[fd].port_range = src->sport_range;
458 set_host_port(&sa, fdinfo[fd].local_port);
Willy Tarreau9650f372009-08-16 14:02:45 +0200459
Willy Tarreaua4380b42012-12-08 22:49:11 +0100460 ret = tcp_bind_socket(fd, flags, &sa, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100461 if (ret != 0)
462 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200463 } while (ret != 0); /* binding NOK */
464 }
465 else {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100466 ret = tcp_bind_socket(fd, flags, &src->source_addr, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100467 if (ret != 0)
468 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200469 }
470
Willy Tarreaua4380b42012-12-08 22:49:11 +0100471 if (unlikely(ret != 0)) {
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200472 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
473 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200474 close(fd);
475
Willy Tarreau9650f372009-08-16 14:02:45 +0200476 if (ret == 1) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100477 Alert("Cannot bind to source address before connect() for backend %s. Aborting.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200478 be->id);
479 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100480 "Cannot bind to source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200481 be->id);
482 } else {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100483 Alert("Cannot bind to tproxy source address before connect() for backend %s. Aborting.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200484 be->id);
485 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100486 "Cannot bind to tproxy source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200487 be->id);
488 }
Willy Tarreau9ce70132014-01-24 16:08:19 +0100489 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200490 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200491 }
492 }
493
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400494#if defined(TCP_QUICKACK)
Willy Tarreau9650f372009-08-16 14:02:45 +0200495 /* disabling tcp quick ack now allows the first request to leave the
496 * machine with the first ACK. We only do this if there are pending
Willy Tarreauf0837b22012-11-24 10:24:27 +0100497 * data in the buffer.
Willy Tarreau9650f372009-08-16 14:02:45 +0200498 */
Willy Tarreaufb20e462014-10-24 12:02:24 +0200499 if (delack == 2 || ((delack || data || conn->send_proxy_ofs) && (be->options2 & PR_O2_SMARTCON)))
Simon Hormande072bd2011-06-24 15:11:37 +0900500 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Willy Tarreau9650f372009-08-16 14:02:45 +0200501#endif
502
Willy Tarreau163d4622015-10-13 16:16:41 +0200503#ifdef TCP_USER_TIMEOUT
504 /* there is not much more we can do here when it fails, it's still minor */
505 if (srv && srv->tcp_ut)
506 setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, &srv->tcp_ut, sizeof(srv->tcp_ut));
507#endif
Willy Tarreaue803de22010-01-21 17:43:04 +0100508 if (global.tune.server_sndbuf)
509 setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &global.tune.server_sndbuf, sizeof(global.tune.server_sndbuf));
510
511 if (global.tune.server_rcvbuf)
512 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &global.tune.server_rcvbuf, sizeof(global.tune.server_rcvbuf));
513
Willy Tarreau986a9d22012-08-30 21:11:38 +0200514 if ((connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) == -1) &&
Willy Tarreau9650f372009-08-16 14:02:45 +0200515 (errno != EINPROGRESS) && (errno != EALREADY) && (errno != EISCONN)) {
516
Willy Tarreaub1719512012-12-08 23:03:28 +0100517 if (errno == EAGAIN || errno == EADDRINUSE || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200518 char *msg;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100519 if (errno == EAGAIN || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200520 msg = "no free ports";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100521 conn->err_code = CO_ER_FREE_PORTS;
522 }
523 else {
Willy Tarreau9650f372009-08-16 14:02:45 +0200524 msg = "local address already in use";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100525 conn->err_code = CO_ER_ADDR_INUSE;
526 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200527
Willy Tarreaub1719512012-12-08 23:03:28 +0100528 qfprintf(stderr,"Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200529 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
530 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200531 close(fd);
Willy Tarreaub1719512012-12-08 23:03:28 +0100532 send_log(be, LOG_ERR, "Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100533 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200534 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200535 } else if (errno == ETIMEDOUT) {
536 //qfprintf(stderr,"Connect(): ETIMEDOUT");
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200537 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
538 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200539 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100540 conn->err_code = CO_ER_SOCK_ERR;
541 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200542 return SF_ERR_SRVTO;
Willy Tarreau9650f372009-08-16 14:02:45 +0200543 } else {
544 // (errno == ECONNREFUSED || errno == ENETUNREACH || errno == EACCES || errno == EPERM)
545 //qfprintf(stderr,"Connect(): %d", errno);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200546 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
547 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200548 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100549 conn->err_code = CO_ER_SOCK_ERR;
550 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200551 return SF_ERR_SRVCL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200552 }
553 }
554
Willy Tarreaufc8f1f02012-12-08 18:53:44 +0100555 conn->flags |= CO_FL_ADDR_TO_SET;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200556
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200557 /* Prepare to send a few handshakes related to the on-wire protocol. */
558 if (conn->send_proxy_ofs)
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200559 conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200560
Willy Tarreauf79c8172013-10-21 16:30:56 +0200561 conn_ctrl_init(conn); /* registers the FD */
Willy Tarreauad38ace2013-12-15 14:19:38 +0100562 fdtab[fd].linger_risk = 1; /* close hard if needed */
Willy Tarreau986a9d22012-08-30 21:11:38 +0200563 conn_sock_want_send(conn); /* for connect status */
Willy Tarreau15678ef2012-08-31 13:54:11 +0200564
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200565 if (conn_xprt_init(conn) < 0) {
Willy Tarreauf79c8172013-10-21 16:30:56 +0200566 conn_force_close(conn);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100567 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200568 return SF_ERR_RESOURCE;
Willy Tarreau184636e2012-09-06 14:04:41 +0200569 }
Willy Tarreau15678ef2012-08-31 13:54:11 +0200570
Willy Tarreau14f8e862012-08-30 22:23:13 +0200571 if (data)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200572 conn_data_want_send(conn); /* prepare to send data if any */
Willy Tarreau9650f372009-08-16 14:02:45 +0200573
Willy Tarreaue7dff022015-04-03 01:14:29 +0200574 return SF_ERR_NONE; /* connection is OK */
Willy Tarreau9650f372009-08-16 14:02:45 +0200575}
576
577
Willy Tarreau59b94792012-05-11 16:16:40 +0200578/*
579 * Retrieves the source address for the socket <fd>, with <dir> indicating
580 * if we're a listener (=0) or an initiator (!=0). It returns 0 in case of
581 * success, -1 in case of error. The socket's source address is stored in
582 * <sa> for <salen> bytes.
583 */
584int tcp_get_src(int fd, struct sockaddr *sa, socklen_t salen, int dir)
585{
586 if (dir)
587 return getsockname(fd, sa, &salen);
588 else
589 return getpeername(fd, sa, &salen);
590}
591
592
593/*
594 * Retrieves the original destination address for the socket <fd>, with <dir>
595 * indicating if we're a listener (=0) or an initiator (!=0). In the case of a
596 * listener, if the original destination address was translated, the original
597 * address is retrieved. It returns 0 in case of success, -1 in case of error.
598 * The socket's source address is stored in <sa> for <salen> bytes.
599 */
600int tcp_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir)
601{
602 if (dir)
603 return getpeername(fd, sa, &salen);
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100604 else {
605 int ret = getsockname(fd, sa, &salen);
606
607 if (ret < 0)
608 return ret;
609
Willy Tarreau59b94792012-05-11 16:16:40 +0200610#if defined(TPROXY) && defined(SO_ORIGINAL_DST)
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100611 /* For TPROXY and Netfilter's NAT, we can retrieve the original
612 * IPv4 address before DNAT/REDIRECT. We must not do that with
613 * other families because v6-mapped IPv4 addresses are still
614 * reported as v4.
615 */
616 if (((struct sockaddr_storage *)sa)->ss_family == AF_INET
617 && getsockopt(fd, SOL_IP, SO_ORIGINAL_DST, sa, &salen) == 0)
618 return 0;
Willy Tarreau59b94792012-05-11 16:16:40 +0200619#endif
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100620 return ret;
621 }
Willy Tarreau59b94792012-05-11 16:16:40 +0200622}
623
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200624/* Tries to drain any pending incoming data from the socket to reach the
Willy Tarreau7f4bcc32014-01-20 11:26:12 +0100625 * receive shutdown. Returns positive if the shutdown was found, negative
626 * if EAGAIN was hit, otherwise zero. This is useful to decide whether we
627 * can close a connection cleanly are we must kill it hard.
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200628 */
629int tcp_drain(int fd)
630{
631 int turns = 2;
632 int len;
633
634 while (turns) {
635#ifdef MSG_TRUNC_CLEARS_INPUT
636 len = recv(fd, NULL, INT_MAX, MSG_DONTWAIT | MSG_NOSIGNAL | MSG_TRUNC);
637 if (len == -1 && errno == EFAULT)
638#endif
639 len = recv(fd, trash.str, trash.size, MSG_DONTWAIT | MSG_NOSIGNAL);
640
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100641 if (len == 0) {
642 /* cool, shutdown received */
643 fdtab[fd].linger_risk = 0;
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200644 return 1;
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100645 }
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200646
647 if (len < 0) {
Willy Tarreauf817e9f2014-01-10 16:58:45 +0100648 if (errno == EAGAIN) {
649 /* connection not closed yet */
650 fd_cant_recv(fd);
Willy Tarreau7f4bcc32014-01-20 11:26:12 +0100651 return -1;
Willy Tarreauf817e9f2014-01-10 16:58:45 +0100652 }
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200653 if (errno == EINTR) /* oops, try again */
654 continue;
655 /* other errors indicate a dead connection, fine. */
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100656 fdtab[fd].linger_risk = 0;
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200657 return 1;
658 }
659 /* OK we read some data, let's try again once */
660 turns--;
661 }
662 /* some data are still present, give up */
663 return 0;
664}
665
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200666/* This is the callback which is set when a connection establishment is pending
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100667 * and we have nothing to send. It updates the FD polling status. It returns 0
668 * if it fails in a fatal way or needs to poll to go further, otherwise it
669 * returns non-zero and removes the CO_FL_WAIT_L4_CONN flag from the connection's
670 * flags. In case of error, it sets CO_FL_ERROR and leaves the error code in
671 * errno. The error checking is done in two passes in order to limit the number
672 * of syscalls in the normal case :
673 * - if POLL_ERR was reported by the poller, we check for a pending error on
674 * the socket before proceeding. If found, it's assigned to errno so that
675 * upper layers can see it.
676 * - otherwise connect() is used to check the connection state again, since
677 * the getsockopt return cannot reliably be used to know if the connection
678 * is still pending or ready. This one may often return an error as well,
679 * since we don't always have POLL_ERR (eg: OSX or cached events).
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200680 */
Willy Tarreau239d7182012-07-23 18:53:03 +0200681int tcp_connect_probe(struct connection *conn)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200682{
Willy Tarreau239d7182012-07-23 18:53:03 +0200683 int fd = conn->t.sock.fd;
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100684 socklen_t lskerr;
685 int skerr;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200686
Willy Tarreau80184712012-07-06 14:54:49 +0200687 if (conn->flags & CO_FL_ERROR)
Willy Tarreauafad0e02012-08-09 14:45:22 +0200688 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200689
Willy Tarreau3c728722014-01-23 13:50:42 +0100690 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200691 return 0;
692
Willy Tarreau80184712012-07-06 14:54:49 +0200693 if (!(conn->flags & CO_FL_WAIT_L4_CONN))
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200694 return 1; /* strange we were called while ready */
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200695
Willy Tarreaufd803bb2014-01-20 15:13:07 +0100696 if (!fd_send_ready(fd))
697 return 0;
698
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100699 /* we might be the first witness of FD_POLL_ERR. Note that FD_POLL_HUP
700 * without FD_POLL_IN also indicates a hangup without input data meaning
701 * there was no connection.
702 */
703 if (fdtab[fd].ev & FD_POLL_ERR ||
704 (fdtab[fd].ev & (FD_POLL_IN|FD_POLL_HUP)) == FD_POLL_HUP) {
705 skerr = 0;
706 lskerr = sizeof(skerr);
707 getsockopt(fd, SOL_SOCKET, SO_ERROR, &skerr, &lskerr);
708 errno = skerr;
709 if (errno == EAGAIN)
710 errno = 0;
711 if (errno)
712 goto out_error;
713 }
Willy Tarreau2da156f2012-07-23 15:07:23 +0200714
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100715 /* Use connect() to check the state of the socket. This has the
716 * advantage of giving us the following info :
Willy Tarreau2c6be842012-07-06 17:12:34 +0200717 * - error
718 * - connecting (EALREADY, EINPROGRESS)
719 * - connected (EISCONN, 0)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200720 */
Willy Tarreau986a9d22012-08-30 21:11:38 +0200721 if (connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) < 0) {
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200722 if (errno == EALREADY || errno == EINPROGRESS) {
Willy Tarreaud486ef52012-12-10 17:03:52 +0100723 __conn_sock_stop_recv(conn);
Willy Tarreaue1f50c42014-01-22 20:02:06 +0100724 fd_cant_send(fd);
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200725 return 0;
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200726 }
Willy Tarreaua190d592012-05-20 18:35:19 +0200727
Willy Tarreau2c6be842012-07-06 17:12:34 +0200728 if (errno && errno != EISCONN)
Willy Tarreaua190d592012-05-20 18:35:19 +0200729 goto out_error;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200730
Willy Tarreau2c6be842012-07-06 17:12:34 +0200731 /* otherwise we're connected */
Willy Tarreaua190d592012-05-20 18:35:19 +0200732 }
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200733
Willy Tarreau076be252012-07-06 16:02:29 +0200734 /* The FD is ready now, we'll mark the connection as complete and
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200735 * forward the event to the transport layer which will notify the
736 * data layer.
Willy Tarreaua190d592012-05-20 18:35:19 +0200737 */
Willy Tarreau80184712012-07-06 14:54:49 +0200738 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200739 return 1;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200740
741 out_error:
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200742 /* Write error on the file descriptor. Report it to the connection
743 * and disable polling on this FD.
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200744 */
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100745 fdtab[fd].linger_risk = 0;
Willy Tarreau26f4a042013-12-04 23:44:10 +0100746 conn->flags |= CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH;
Willy Tarreaud486ef52012-12-10 17:03:52 +0100747 __conn_sock_stop_both(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200748 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200749}
750
Willy Tarreau59b94792012-05-11 16:16:40 +0200751
Willy Tarreaue6b98942007-10-29 01:09:36 +0100752/* This function tries to bind a TCPv4/v6 listener. It may return a warning or
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100753 * an error message in <errmsg> if the message is at most <errlen> bytes long
754 * (including '\0'). Note that <errmsg> may be NULL if <errlen> is also zero.
755 * The return value is composed from ERR_ABORT, ERR_WARN,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100756 * ERR_ALERT, ERR_RETRYABLE and ERR_FATAL. ERR_NONE indicates that everything
757 * was alright and that no message was returned. ERR_RETRYABLE means that an
758 * error occurred but that it may vanish after a retry (eg: port in use), and
Aman Guptad94991d2012-04-06 17:39:26 -0700759 * ERR_FATAL indicates a non-fixable error. ERR_WARN and ERR_ALERT do not alter
Willy Tarreaue6b98942007-10-29 01:09:36 +0100760 * the meaning of the error, but just indicate that a message is present which
761 * should be displayed with the respective level. Last, ERR_ABORT indicates
762 * that it's pointless to try to start other listeners. No error message is
763 * returned if errlen is NULL.
764 */
765int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen)
766{
767 __label__ tcp_return, tcp_close_return;
768 int fd, err;
Willy Tarreau40aa0702013-03-10 23:51:38 +0100769 int ext, ready;
770 socklen_t ready_len;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100771 const char *msg = NULL;
772
773 /* ensure we never return garbage */
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100774 if (errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100775 *errmsg = 0;
776
777 if (listener->state != LI_ASSIGNED)
778 return ERR_NONE; /* already bound */
779
780 err = ERR_NONE;
781
Willy Tarreau40aa0702013-03-10 23:51:38 +0100782 /* if the listener already has an fd assigned, then we were offered the
783 * fd by an external process (most likely the parent), and we don't want
784 * to create a new socket. However we still want to set a few flags on
785 * the socket.
786 */
787 fd = listener->fd;
788 ext = (fd >= 0);
789
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100790 if (!ext) {
791 fd = my_socketat(listener->netns, listener->addr.ss_family, SOCK_STREAM, IPPROTO_TCP);
792
793 if (fd == -1) {
794 err |= ERR_RETRYABLE | ERR_ALERT;
795 msg = "cannot create listening socket";
796 goto tcp_return;
797 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100798 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100799
Willy Tarreaue6b98942007-10-29 01:09:36 +0100800 if (fd >= global.maxsock) {
801 err |= ERR_FATAL | ERR_ABORT | ERR_ALERT;
802 msg = "not enough free sockets (raise '-n' parameter)";
803 goto tcp_close_return;
804 }
805
Willy Tarreaufb14edc2009-06-14 15:24:37 +0200806 if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100807 err |= ERR_FATAL | ERR_ALERT;
808 msg = "cannot make socket non-blocking";
809 goto tcp_close_return;
810 }
811
Willy Tarreau40aa0702013-03-10 23:51:38 +0100812 if (!ext && setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100813 /* not fatal but should be reported */
814 msg = "cannot do so_reuseaddr";
815 err |= ERR_ALERT;
816 }
817
818 if (listener->options & LI_O_NOLINGER)
Simon Hormande072bd2011-06-24 15:11:37 +0900819 setsockopt(fd, SOL_SOCKET, SO_LINGER, &nolinger, sizeof(struct linger));
Willy Tarreauedcf6682008-11-30 23:15:34 +0100820
Willy Tarreaue6b98942007-10-29 01:09:36 +0100821#ifdef SO_REUSEPORT
822 /* OpenBSD supports this. As it's present in old libc versions of Linux,
823 * it might return an error that we will silently ignore.
824 */
Willy Tarreau40aa0702013-03-10 23:51:38 +0100825 if (!ext)
826 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));
Willy Tarreaue6b98942007-10-29 01:09:36 +0100827#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200828
Willy Tarreau40aa0702013-03-10 23:51:38 +0100829 if (!ext && (listener->options & LI_O_FOREIGN)) {
David du Colombier65c17962012-07-13 14:34:59 +0200830 switch (listener->addr.ss_family) {
831 case AF_INET:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200832 if (1
833#if defined(IP_TRANSPARENT)
834 && (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == -1)
835#endif
836#if defined(IP_FREEBIND)
837 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
838#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200839#if defined(IP_BINDANY)
840 && (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == -1)
841#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200842#if defined(SO_BINDANY)
843 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
844#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200845 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200846 msg = "cannot make listening socket transparent";
847 err |= ERR_ALERT;
848 }
849 break;
850 case AF_INET6:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200851 if (1
852#if defined(IPV6_TRANSPARENT)
853 && (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == -1)
854#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100855#if defined(IP_FREEBIND)
856 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
857#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200858#if defined(IPV6_BINDANY)
859 && (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == -1)
860#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200861#if defined(SO_BINDANY)
862 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
863#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200864 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200865 msg = "cannot make listening socket transparent";
866 err |= ERR_ALERT;
867 }
868 break;
869 }
Willy Tarreaub1e52e82008-01-13 14:49:51 +0100870 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200871
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100872#ifdef SO_BINDTODEVICE
873 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreau40aa0702013-03-10 23:51:38 +0100874 if (!ext && listener->interface) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100875 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
Willy Tarreau604e8302009-03-06 00:48:23 +0100876 listener->interface, strlen(listener->interface) + 1) == -1) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100877 msg = "cannot bind listener to device";
878 err |= ERR_WARN;
879 }
880 }
881#endif
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400882#if defined(TCP_MAXSEG)
Willy Tarreau48a7e722010-12-24 15:26:39 +0100883 if (listener->maxseg > 0) {
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400884 if (setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG,
Willy Tarreaube1b9182009-06-14 18:48:19 +0200885 &listener->maxseg, sizeof(listener->maxseg)) == -1) {
886 msg = "cannot set MSS";
887 err |= ERR_WARN;
888 }
889 }
890#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +0100891#if defined(TCP_USER_TIMEOUT)
892 if (listener->tcp_ut) {
893 if (setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT,
894 &listener->tcp_ut, sizeof(listener->tcp_ut)) == -1) {
895 msg = "cannot set TCP User Timeout";
896 err |= ERR_WARN;
897 }
898 }
899#endif
Willy Tarreaucb6cd432009-10-13 07:34:14 +0200900#if defined(TCP_DEFER_ACCEPT)
901 if (listener->options & LI_O_DEF_ACCEPT) {
902 /* defer accept by up to one second */
903 int accept_delay = 1;
904 if (setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &accept_delay, sizeof(accept_delay)) == -1) {
905 msg = "cannot enable DEFER_ACCEPT";
906 err |= ERR_WARN;
907 }
908 }
909#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +0200910#if defined(TCP_FASTOPEN)
911 if (listener->options & LI_O_TCP_FO) {
912 /* TFO needs a queue length, let's use the configured backlog */
913 int qlen = listener->backlog ? listener->backlog : listener->maxconn;
914 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) == -1) {
915 msg = "cannot enable TCP_FASTOPEN";
916 err |= ERR_WARN;
917 }
918 }
919#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +0100920#if defined(IPV6_V6ONLY)
921 if (listener->options & LI_O_V6ONLY)
922 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
Willy Tarreau77e3af92012-11-24 15:07:23 +0100923 else if (listener->options & LI_O_V4V6)
924 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero));
Willy Tarreau9b6700f2012-11-24 11:55:28 +0100925#endif
926
Willy Tarreau40aa0702013-03-10 23:51:38 +0100927 if (!ext && bind(fd, (struct sockaddr *)&listener->addr, listener->proto->sock_addrlen) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100928 err |= ERR_RETRYABLE | ERR_ALERT;
929 msg = "cannot bind socket";
930 goto tcp_close_return;
931 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100932
Willy Tarreau40aa0702013-03-10 23:51:38 +0100933 ready = 0;
934 ready_len = sizeof(ready);
935 if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &ready, &ready_len) == -1)
936 ready = 0;
937
938 if (!(ext && ready) && /* only listen if not already done by external process */
939 listen(fd, listener->backlog ? listener->backlog : listener->maxconn) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100940 err |= ERR_RETRYABLE | ERR_ALERT;
941 msg = "cannot listen to socket";
942 goto tcp_close_return;
943 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100944
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400945#if defined(TCP_QUICKACK)
Willy Tarreau9ea05a72009-06-14 12:07:01 +0200946 if (listener->options & LI_O_NOQUICKACK)
Simon Hormande072bd2011-06-24 15:11:37 +0900947 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Willy Tarreau9ea05a72009-06-14 12:07:01 +0200948#endif
949
Willy Tarreaue6b98942007-10-29 01:09:36 +0100950 /* the socket is ready */
951 listener->fd = fd;
952 listener->state = LI_LISTEN;
953
Willy Tarreaueabf3132008-08-29 23:36:51 +0200954 fdtab[fd].owner = listener; /* reference the listener instead of a task */
Willy Tarreauaece46a2012-07-06 12:25:58 +0200955 fdtab[fd].iocb = listener->proto->accept;
Willy Tarreaueb472682010-05-28 18:46:57 +0200956 fd_insert(fd);
957
Willy Tarreaue6b98942007-10-29 01:09:36 +0100958 tcp_return:
Cyril Bonté43ba1b32010-11-01 19:26:01 +0100959 if (msg && errlen) {
960 char pn[INET6_ADDRSTRLEN];
961
Willy Tarreau631f01c2011-09-05 00:36:48 +0200962 addr_to_str(&listener->addr, pn, sizeof(pn));
963 snprintf(errmsg, errlen, "%s [%s:%d]", msg, pn, get_host_port(&listener->addr));
Cyril Bonté43ba1b32010-11-01 19:26:01 +0100964 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100965 return err;
966
967 tcp_close_return:
968 close(fd);
969 goto tcp_return;
970}
971
972/* This function creates all TCP sockets bound to the protocol entry <proto>.
973 * It is intended to be used as the protocol's bind_all() function.
974 * The sockets will be registered but not added to any fd_set, in order not to
975 * loose them across the fork(). A call to enable_all_listeners() is needed
976 * to complete initialization. The return value is composed from ERR_*.
977 */
Emeric Bruncf20bf12010-10-22 16:06:11 +0200978static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100979{
980 struct listener *listener;
981 int err = ERR_NONE;
982
983 list_for_each_entry(listener, &proto->listeners, proto_list) {
Emeric Bruncf20bf12010-10-22 16:06:11 +0200984 err |= tcp_bind_listener(listener, errmsg, errlen);
985 if (err & ERR_ABORT)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100986 break;
987 }
988
989 return err;
990}
991
992/* Add listener to the list of tcpv4 listeners. The listener's state
993 * is automatically updated from LI_INIT to LI_ASSIGNED. The number of
994 * listeners is updated. This is the function to use to add a new listener.
995 */
996void tcpv4_add_listener(struct listener *listener)
997{
998 if (listener->state != LI_INIT)
999 return;
1000 listener->state = LI_ASSIGNED;
1001 listener->proto = &proto_tcpv4;
1002 LIST_ADDQ(&proto_tcpv4.listeners, &listener->proto_list);
1003 proto_tcpv4.nb_listeners++;
1004}
1005
1006/* Add listener to the list of tcpv4 listeners. The listener's state
1007 * is automatically updated from LI_INIT to LI_ASSIGNED. The number of
1008 * listeners is updated. This is the function to use to add a new listener.
1009 */
1010void tcpv6_add_listener(struct listener *listener)
1011{
1012 if (listener->state != LI_INIT)
1013 return;
1014 listener->state = LI_ASSIGNED;
1015 listener->proto = &proto_tcpv6;
1016 LIST_ADDQ(&proto_tcpv6.listeners, &listener->proto_list);
1017 proto_tcpv6.nb_listeners++;
1018}
1019
Willy Tarreau092d8652014-07-07 20:22:12 +02001020/* Pause a listener. Returns < 0 in case of failure, 0 if the listener
1021 * was totally stopped, or > 0 if correctly paused.
1022 */
1023int tcp_pause_listener(struct listener *l)
1024{
1025 if (shutdown(l->fd, SHUT_WR) != 0)
1026 return -1; /* Solaris dies here */
1027
1028 if (listen(l->fd, l->backlog ? l->backlog : l->maxconn) != 0)
1029 return -1; /* OpenBSD dies here */
1030
1031 if (shutdown(l->fd, SHUT_RD) != 0)
1032 return -1; /* should always be OK */
1033 return 1;
1034}
1035
Willy Tarreauedcf6682008-11-30 23:15:34 +01001036/* This function performs the TCP request analysis on the current request. It
1037 * returns 1 if the processing can continue on next analysers, or zero if it
1038 * needs more data, encounters an error, or wants to immediately abort the
Willy Tarreaufb356202010-08-03 14:02:05 +02001039 * request. It relies on buffers flags, and updates s->req->analysers. The
1040 * function may be called for frontend rules and backend rules. It only relies
1041 * on the backend pointer so this works for both cases.
Willy Tarreauedcf6682008-11-30 23:15:34 +01001042 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001043int tcp_inspect_request(struct stream *s, struct channel *req, int an_bit)
Willy Tarreauedcf6682008-11-30 23:15:34 +01001044{
Willy Tarreaufb0afa72015-04-03 14:46:27 +02001045 struct session *sess = s->sess;
Thierry FOURNIERa28a9422015-08-04 19:35:46 +02001046 struct act_rule *rule;
Willy Tarreaud1f96522010-08-03 19:34:32 +02001047 struct stksess *ts;
1048 struct stktable *t;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001049 int partial;
Willy Tarreauacc98002015-09-27 23:34:39 +02001050 int act_flags = 0;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001051
Willy Tarreau87b09662015-04-03 00:22:06 +02001052 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
Willy Tarreauedcf6682008-11-30 23:15:34 +01001053 now_ms, __FUNCTION__,
1054 s,
1055 req,
1056 req->rex, req->wex,
1057 req->flags,
Willy Tarreau9b28e032012-10-12 23:49:43 +02001058 req->buf->i,
Willy Tarreauedcf6682008-11-30 23:15:34 +01001059 req->analysers);
1060
Willy Tarreauedcf6682008-11-30 23:15:34 +01001061 /* We don't know whether we have enough data, so must proceed
1062 * this way :
1063 * - iterate through all rules in their declaration order
1064 * - if one rule returns MISS, it means the inspect delay is
1065 * not over yet, then return immediately, otherwise consider
1066 * it as a non-match.
1067 * - if one rule returns OK, then return OK
1068 * - if one rule returns KO, then return KO
1069 */
1070
Willy Tarreau9b28e032012-10-12 23:49:43 +02001071 if ((req->flags & CF_SHUTR) || buffer_full(req->buf, global.tune.maxrewrite) ||
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +02001072 !s->be->tcp_req.inspect_delay || tick_is_expired(req->analyse_exp, now_ms))
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001073 partial = SMP_OPT_FINAL;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001074 else
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001075 partial = 0;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001076
Thierry FOURNIERbc4c1ac2015-02-25 13:36:14 +01001077 /* If "the current_rule_list" match the executed rule list, we are in
1078 * resume condition. If a resume is needed it is always in the action
1079 * and never in the ACL or converters. In this case, we initialise the
1080 * current rule, and go to the action execution point.
1081 */
Willy Tarreau152b81e2015-04-20 13:26:17 +02001082 if (s->current_rule) {
1083 rule = s->current_rule;
1084 s->current_rule = NULL;
1085 if (s->current_rule_list == &s->be->tcp_req.inspect_rules)
1086 goto resume_execution;
Thierry FOURNIERbc4c1ac2015-02-25 13:36:14 +01001087 }
1088 s->current_rule_list = &s->be->tcp_req.inspect_rules;
Willy Tarreau152b81e2015-04-20 13:26:17 +02001089
Willy Tarreaufb356202010-08-03 14:02:05 +02001090 list_for_each_entry(rule, &s->be->tcp_req.inspect_rules, list) {
Willy Tarreau0cba6072013-11-28 22:21:02 +01001091 enum acl_test_res ret = ACL_TEST_PASS;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001092
1093 if (rule->cond) {
Willy Tarreau192252e2015-04-04 01:47:55 +02001094 ret = acl_exec_cond(rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ | partial);
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001095 if (ret == ACL_TEST_MISS)
1096 goto missing_data;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001097
1098 ret = acl_pass(ret);
1099 if (rule->cond->pol == ACL_COND_UNLESS)
1100 ret = !ret;
1101 }
1102
1103 if (ret) {
Willy Tarreauacc98002015-09-27 23:34:39 +02001104 act_flags |= ACT_FLAG_FIRST;
Thierry FOURNIERbc4c1ac2015-02-25 13:36:14 +01001105resume_execution:
Willy Tarreauedcf6682008-11-30 23:15:34 +01001106 /* we have a matching rule. */
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001107 if (rule->action == ACT_ACTION_ALLOW) {
Willy Tarreau27f78242015-07-04 11:36:30 +02001108 break;
1109 }
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001110 else if (rule->action == ACT_ACTION_DENY) {
Willy Tarreau8263d2b2012-08-28 00:06:31 +02001111 channel_abort(req);
Willy Tarreau22ec1ea2014-11-27 20:45:39 +01001112 channel_abort(&s->res);
Willy Tarreauedcf6682008-11-30 23:15:34 +01001113 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +02001114
Willy Tarreau7d0aaf32011-03-10 23:25:56 +01001115 s->be->be_counters.denied_req++;
Willy Tarreaue36cbcb2015-04-03 15:40:56 +02001116 sess->fe->fe_counters.denied_req++;
Willy Tarreaufb0afa72015-04-03 14:46:27 +02001117 if (sess->listener->counters)
1118 sess->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +02001119
Willy Tarreaue7dff022015-04-03 01:14:29 +02001120 if (!(s->flags & SF_ERR_MASK))
1121 s->flags |= SF_ERR_PRXCOND;
1122 if (!(s->flags & SF_FINST_MASK))
1123 s->flags |= SF_FINST_R;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001124 return 0;
1125 }
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001126 else if (rule->action >= ACT_ACTION_TRK_SC0 && rule->action <= ACT_ACTION_TRK_SCMAX) {
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001127 /* Note: only the first valid tracking parameter of each
1128 * applies.
1129 */
1130 struct stktable_key *key;
Willy Tarreau1b71eb52014-06-25 17:01:56 +02001131 struct sample smp;
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001132
Willy Tarreaucc08d2c2014-01-28 23:18:23 +01001133 if (stkctr_entry(&s->stkctr[tcp_trk_idx(rule->action)]))
Willy Tarreau44778ad2013-10-30 19:24:00 +01001134 continue;
1135
Thierry FOURNIER5ec63e02015-08-04 09:09:48 +02001136 t = rule->arg.trk_ctr.table.t;
1137 key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_REQ | partial, rule->arg.trk_ctr.expr, &smp);
Willy Tarreau1b71eb52014-06-25 17:01:56 +02001138
Willy Tarreau6bcb0a82014-07-30 08:56:35 +02001139 if ((smp.flags & SMP_F_MAY_CHANGE) && !(partial & SMP_OPT_FINAL))
1140 goto missing_data; /* key might appear later */
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001141
1142 if (key && (ts = stktable_get_entry(t, key))) {
Willy Tarreau87b09662015-04-03 00:22:06 +02001143 stream_track_stkctr(&s->stkctr[tcp_trk_idx(rule->action)], t, ts);
Willy Tarreaucc08d2c2014-01-28 23:18:23 +01001144 stkctr_set_flags(&s->stkctr[tcp_trk_idx(rule->action)], STKCTR_TRACK_CONTENT);
Willy Tarreaue36cbcb2015-04-03 15:40:56 +02001145 if (sess->fe != s->be)
Willy Tarreaucc08d2c2014-01-28 23:18:23 +01001146 stkctr_set_flags(&s->stkctr[tcp_trk_idx(rule->action)], STKCTR_TRACK_BACKEND);
Willy Tarreaud1f96522010-08-03 19:34:32 +02001147 }
1148 }
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001149 else if (rule->action == ACT_TCP_CAPTURE) {
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001150 struct sample *key;
Thierry FOURNIERd0d65ae2015-08-04 08:21:12 +02001151 struct cap_hdr *h = rule->arg.cap.hdr;
Willy Tarreaucb7dd012015-04-03 22:16:32 +02001152 char **cap = s->req_cap;
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001153 int len;
1154
Thierry FOURNIERd0d65ae2015-08-04 08:21:12 +02001155 key = sample_fetch_as_type(s->be, sess, s, SMP_OPT_DIR_REQ | partial, rule->arg.cap.expr, SMP_T_STR);
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001156 if (!key)
1157 continue;
1158
1159 if (key->flags & SMP_F_MAY_CHANGE)
1160 goto missing_data;
1161
1162 if (cap[h->index] == NULL)
1163 cap[h->index] = pool_alloc2(h->pool);
1164
1165 if (cap[h->index] == NULL) /* no more capture memory */
1166 continue;
1167
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001168 len = key->data.u.str.len;
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001169 if (len > h->len)
1170 len = h->len;
1171
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001172 memcpy(cap[h->index], key->data.u.str.str, len);
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001173 cap[h->index][len] = 0;
1174 }
Willy Tarreaud1f96522010-08-03 19:34:32 +02001175 else {
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001176 /* Custom keywords. */
Thierry FOURNIER42148732015-09-02 17:17:33 +02001177 if (!rule->action_ptr)
1178 continue;
Willy Tarreauc1b10d32015-09-27 10:06:24 +02001179
Willy Tarreauacc98002015-09-27 23:34:39 +02001180 if (partial & SMP_OPT_FINAL)
1181 act_flags |= ACT_FLAG_FINAL;
1182
1183 switch (rule->action_ptr(rule, s->be, s->sess, s, act_flags)) {
Thierry FOURNIER42148732015-09-02 17:17:33 +02001184 case ACT_RET_ERR:
1185 case ACT_RET_CONT:
1186 continue;
1187 case ACT_RET_STOP:
Thierry FOURNIER561a0f92015-05-29 17:29:14 +02001188 break;
Thierry FOURNIER42148732015-09-02 17:17:33 +02001189 case ACT_RET_YIELD:
1190 s->current_rule = rule;
1191 goto missing_data;
1192 }
1193 break; /* ACT_RET_STOP */
Willy Tarreaud1f96522010-08-03 19:34:32 +02001194 }
Willy Tarreauedcf6682008-11-30 23:15:34 +01001195 }
1196 }
1197
1198 /* if we get there, it means we have no rule which matches, or
1199 * we have an explicit accept, so we apply the default accept.
1200 */
Willy Tarreau3a816292009-07-07 10:55:49 +02001201 req->analysers &= ~an_bit;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001202 req->analyse_exp = TICK_ETERNITY;
1203 return 1;
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001204
1205 missing_data:
1206 channel_dont_connect(req);
1207 /* just set the request timeout once at the beginning of the request */
1208 if (!tick_isset(req->analyse_exp) && s->be->tcp_req.inspect_delay)
1209 req->analyse_exp = tick_add(now_ms, s->be->tcp_req.inspect_delay);
1210 return 0;
1211
Willy Tarreauedcf6682008-11-30 23:15:34 +01001212}
1213
Emeric Brun97679e72010-09-23 17:56:44 +02001214/* This function performs the TCP response analysis on the current response. It
1215 * returns 1 if the processing can continue on next analysers, or zero if it
1216 * needs more data, encounters an error, or wants to immediately abort the
1217 * response. It relies on buffers flags, and updates s->rep->analysers. The
1218 * function may be called for backend rules.
1219 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001220int tcp_inspect_response(struct stream *s, struct channel *rep, int an_bit)
Emeric Brun97679e72010-09-23 17:56:44 +02001221{
Willy Tarreaufb0afa72015-04-03 14:46:27 +02001222 struct session *sess = s->sess;
Thierry FOURNIERa28a9422015-08-04 19:35:46 +02001223 struct act_rule *rule;
Emeric Brun97679e72010-09-23 17:56:44 +02001224 int partial;
Willy Tarreauacc98002015-09-27 23:34:39 +02001225 int act_flags = 0;
Emeric Brun97679e72010-09-23 17:56:44 +02001226
Willy Tarreau87b09662015-04-03 00:22:06 +02001227 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
Emeric Brun97679e72010-09-23 17:56:44 +02001228 now_ms, __FUNCTION__,
1229 s,
1230 rep,
1231 rep->rex, rep->wex,
1232 rep->flags,
Willy Tarreau9b28e032012-10-12 23:49:43 +02001233 rep->buf->i,
Emeric Brun97679e72010-09-23 17:56:44 +02001234 rep->analysers);
1235
1236 /* We don't know whether we have enough data, so must proceed
1237 * this way :
1238 * - iterate through all rules in their declaration order
1239 * - if one rule returns MISS, it means the inspect delay is
1240 * not over yet, then return immediately, otherwise consider
1241 * it as a non-match.
1242 * - if one rule returns OK, then return OK
1243 * - if one rule returns KO, then return KO
1244 */
1245
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001246 if (rep->flags & CF_SHUTR || tick_is_expired(rep->analyse_exp, now_ms))
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001247 partial = SMP_OPT_FINAL;
Emeric Brun97679e72010-09-23 17:56:44 +02001248 else
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001249 partial = 0;
Emeric Brun97679e72010-09-23 17:56:44 +02001250
Thierry FOURNIERbc4c1ac2015-02-25 13:36:14 +01001251 /* If "the current_rule_list" match the executed rule list, we are in
1252 * resume condition. If a resume is needed it is always in the action
1253 * and never in the ACL or converters. In this case, we initialise the
1254 * current rule, and go to the action execution point.
1255 */
Willy Tarreau152b81e2015-04-20 13:26:17 +02001256 if (s->current_rule) {
1257 rule = s->current_rule;
1258 s->current_rule = NULL;
1259 if (s->current_rule_list == &s->be->tcp_rep.inspect_rules)
1260 goto resume_execution;
Thierry FOURNIERbc4c1ac2015-02-25 13:36:14 +01001261 }
1262 s->current_rule_list = &s->be->tcp_rep.inspect_rules;
Willy Tarreau152b81e2015-04-20 13:26:17 +02001263
Emeric Brun97679e72010-09-23 17:56:44 +02001264 list_for_each_entry(rule, &s->be->tcp_rep.inspect_rules, list) {
Willy Tarreau0cba6072013-11-28 22:21:02 +01001265 enum acl_test_res ret = ACL_TEST_PASS;
Emeric Brun97679e72010-09-23 17:56:44 +02001266
1267 if (rule->cond) {
Willy Tarreau192252e2015-04-04 01:47:55 +02001268 ret = acl_exec_cond(rule->cond, s->be, sess, s, SMP_OPT_DIR_RES | partial);
Thierry FOURNIERa65b3432013-11-28 18:22:00 +01001269 if (ret == ACL_TEST_MISS) {
Emeric Brun97679e72010-09-23 17:56:44 +02001270 /* just set the analyser timeout once at the beginning of the response */
1271 if (!tick_isset(rep->analyse_exp) && s->be->tcp_rep.inspect_delay)
Willy Tarreau0bb166b2013-11-04 15:56:53 +01001272 rep->analyse_exp = tick_add(now_ms, s->be->tcp_rep.inspect_delay);
Emeric Brun97679e72010-09-23 17:56:44 +02001273 return 0;
1274 }
1275
1276 ret = acl_pass(ret);
1277 if (rule->cond->pol == ACL_COND_UNLESS)
1278 ret = !ret;
1279 }
1280
1281 if (ret) {
Willy Tarreauacc98002015-09-27 23:34:39 +02001282 act_flags |= ACT_FLAG_FIRST;
Thierry FOURNIERbc4c1ac2015-02-25 13:36:14 +01001283resume_execution:
Emeric Brun97679e72010-09-23 17:56:44 +02001284 /* we have a matching rule. */
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001285 if (rule->action == ACT_ACTION_ALLOW) {
Willy Tarreau27f78242015-07-04 11:36:30 +02001286 break;
1287 }
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001288 else if (rule->action == ACT_ACTION_DENY) {
Willy Tarreau8263d2b2012-08-28 00:06:31 +02001289 channel_abort(rep);
Willy Tarreau22ec1ea2014-11-27 20:45:39 +01001290 channel_abort(&s->req);
Emeric Brun97679e72010-09-23 17:56:44 +02001291 rep->analysers = 0;
1292
Willy Tarreau7d0aaf32011-03-10 23:25:56 +01001293 s->be->be_counters.denied_resp++;
Willy Tarreaue36cbcb2015-04-03 15:40:56 +02001294 sess->fe->fe_counters.denied_resp++;
Willy Tarreaufb0afa72015-04-03 14:46:27 +02001295 if (sess->listener->counters)
1296 sess->listener->counters->denied_resp++;
Emeric Brun97679e72010-09-23 17:56:44 +02001297
Willy Tarreaue7dff022015-04-03 01:14:29 +02001298 if (!(s->flags & SF_ERR_MASK))
1299 s->flags |= SF_ERR_PRXCOND;
1300 if (!(s->flags & SF_FINST_MASK))
1301 s->flags |= SF_FINST_D;
Emeric Brun97679e72010-09-23 17:56:44 +02001302 return 0;
1303 }
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001304 else if (rule->action == ACT_TCP_CLOSE) {
Willy Tarreau73796532014-11-28 14:10:28 +01001305 chn_prod(rep)->flags |= SI_FL_NOLINGER | SI_FL_NOHALF;
1306 si_shutr(chn_prod(rep));
1307 si_shutw(chn_prod(rep));
Willy Tarreaucc1e04b2013-09-11 23:20:29 +02001308 break;
1309 }
Emeric Brun97679e72010-09-23 17:56:44 +02001310 else {
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001311 /* Custom keywords. */
Thierry FOURNIER42148732015-09-02 17:17:33 +02001312 if (!rule->action_ptr)
1313 continue;
Willy Tarreauacc98002015-09-27 23:34:39 +02001314
1315 if (partial & SMP_OPT_FINAL)
1316 act_flags |= ACT_FLAG_FINAL;
1317
1318 switch (rule->action_ptr(rule, s->be, s->sess, s, act_flags)) {
Thierry FOURNIER42148732015-09-02 17:17:33 +02001319 case ACT_RET_ERR:
1320 case ACT_RET_CONT:
1321 continue;
1322 case ACT_RET_STOP:
Thierry FOURNIER561a0f92015-05-29 17:29:14 +02001323 break;
Thierry FOURNIER42148732015-09-02 17:17:33 +02001324 case ACT_RET_YIELD:
1325 channel_dont_close(rep);
1326 s->current_rule = rule;
1327 return 0;
1328 }
1329 break; /* ACT_RET_STOP */
Emeric Brun97679e72010-09-23 17:56:44 +02001330 }
1331 }
1332 }
1333
1334 /* if we get there, it means we have no rule which matches, or
1335 * we have an explicit accept, so we apply the default accept.
1336 */
1337 rep->analysers &= ~an_bit;
1338 rep->analyse_exp = TICK_ETERNITY;
1339 return 1;
1340}
1341
1342
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001343/* This function performs the TCP layer4 analysis on the current request. It
1344 * returns 0 if a reject rule matches, otherwise 1 if either an accept rule
1345 * matches or if no more rule matches. It can only use rules which don't need
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001346 * any data. This only works on connection-based client-facing stream interfaces.
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001347 */
Willy Tarreaue73ef852015-04-04 16:41:45 +02001348int tcp_exec_req_rules(struct session *sess)
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001349{
Thierry FOURNIERa28a9422015-08-04 19:35:46 +02001350 struct act_rule *rule;
Willy Tarreauf059a0f2010-08-03 16:29:52 +02001351 struct stksess *ts;
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001352 struct stktable *t = NULL;
Willy Tarreau9ad7bd42015-04-03 19:19:59 +02001353 struct connection *conn = objt_conn(sess->origin);
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001354 int result = 1;
Willy Tarreau0cba6072013-11-28 22:21:02 +01001355 enum acl_test_res ret;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001356
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001357 if (!conn)
1358 return result;
1359
Willy Tarreaue36cbcb2015-04-03 15:40:56 +02001360 list_for_each_entry(rule, &sess->fe->tcp_req.l4_rules, list) {
Thierry FOURNIERa65b3432013-11-28 18:22:00 +01001361 ret = ACL_TEST_PASS;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001362
1363 if (rule->cond) {
Willy Tarreaue73ef852015-04-04 16:41:45 +02001364 ret = acl_exec_cond(rule->cond, sess->fe, sess, NULL, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001365 ret = acl_pass(ret);
1366 if (rule->cond->pol == ACL_COND_UNLESS)
1367 ret = !ret;
1368 }
1369
1370 if (ret) {
1371 /* we have a matching rule. */
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001372 if (rule->action == ACT_ACTION_ALLOW) {
Willy Tarreau27f78242015-07-04 11:36:30 +02001373 break;
1374 }
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001375 else if (rule->action == ACT_ACTION_DENY) {
Willy Tarreaue36cbcb2015-04-03 15:40:56 +02001376 sess->fe->fe_counters.denied_conn++;
Willy Tarreaufb0afa72015-04-03 14:46:27 +02001377 if (sess->listener->counters)
1378 sess->listener->counters->denied_conn++;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001379
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001380 result = 0;
1381 break;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001382 }
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001383 else if (rule->action >= ACT_ACTION_TRK_SC0 && rule->action <= ACT_ACTION_TRK_SCMAX) {
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001384 /* Note: only the first valid tracking parameter of each
1385 * applies.
1386 */
1387 struct stktable_key *key;
1388
Willy Tarreau70f454e2015-04-04 16:38:07 +02001389 if (stkctr_entry(&sess->stkctr[tcp_trk_idx(rule->action)]))
Willy Tarreau44778ad2013-10-30 19:24:00 +01001390 continue;
1391
Thierry FOURNIER5ec63e02015-08-04 09:09:48 +02001392 t = rule->arg.trk_ctr.table.t;
1393 key = stktable_fetch_key(t, sess->fe, sess, NULL, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.trk_ctr.expr, NULL);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001394
Willy Tarreaud5ca9ab2013-05-28 17:40:25 +02001395 if (key && (ts = stktable_get_entry(t, key)))
Willy Tarreau70f454e2015-04-04 16:38:07 +02001396 stream_track_stkctr(&sess->stkctr[tcp_trk_idx(rule->action)], t, ts);
Willy Tarreauf059a0f2010-08-03 16:29:52 +02001397 }
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001398 else if (rule->action == ACT_TCP_EXPECT_PX) {
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001399 conn->flags |= CO_FL_ACCEPT_PROXY;
1400 conn_sock_want_recv(conn);
Willy Tarreau4f0d9192013-06-11 20:40:55 +02001401 }
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001402 else {
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001403 /* Custom keywords. */
Willy Tarreau45059e92015-09-28 17:50:10 +02001404 if (!rule->action_ptr)
Thierry FOURNIER42148732015-09-02 17:17:33 +02001405 break;
Willy Tarreauacc98002015-09-27 23:34:39 +02001406 switch (rule->action_ptr(rule, sess->fe, sess, NULL, ACT_FLAG_FINAL | ACT_FLAG_FIRST)) {
Thierry FOURNIER42148732015-09-02 17:17:33 +02001407 case ACT_RET_YIELD:
1408 /* yield is not allowed at this point. If this return code is
1409 * used it is a bug, so I prefer to abort the process.
1410 */
1411 send_log(sess->fe, LOG_WARNING,
1412 "Internal error: yield not allowed with tcp-request connection actions.");
1413 case ACT_RET_STOP:
1414 break;
1415 case ACT_RET_CONT:
1416 continue;
1417 case ACT_RET_ERR:
1418 result = 0;
1419 break;
Thierry FOURNIERc89f4f52015-08-11 09:48:02 +02001420 }
Thierry FOURNIER42148732015-09-02 17:17:33 +02001421 break; /* ACT_RET_STOP */
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001422 }
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001423 }
1424 }
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001425 return result;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001426}
1427
Willy Tarreau2d392c22015-08-24 01:43:45 +02001428/* Executes the "silent-drop" action. May be called from {tcp,http}{request,response} */
1429static enum act_return tcp_exec_action_silent_drop(struct act_rule *rule, struct proxy *px, struct session *sess, struct stream *strm, int flags)
1430{
1431 struct connection *conn = objt_conn(sess->origin);
1432
1433 if (!conn)
1434 goto out;
1435
1436 if (!conn_ctrl_ready(conn))
1437 goto out;
1438
Willy Tarreau2d392c22015-08-24 01:43:45 +02001439#ifdef TCP_QUICKACK
Willy Tarreaufc2a2d92015-09-29 18:15:01 +02001440 /* drain is needed only to send the quick ACK */
1441 conn_sock_drain(conn);
1442
Willy Tarreau2d392c22015-08-24 01:43:45 +02001443 /* re-enable quickack if it was disabled to ack all data and avoid
1444 * retransmits from the client that might trigger a real reset.
1445 */
1446 setsockopt(conn->t.sock.fd, SOL_TCP, TCP_QUICKACK, &one, sizeof(one));
1447#endif
1448 /* lingering must absolutely be disabled so that we don't send a
1449 * shutdown(), this is critical to the TCP_REPAIR trick. When no stream
1450 * is present, returning with ERR will cause lingering to be disabled.
1451 */
1452 if (strm)
1453 strm->si[0].flags |= SI_FL_NOLINGER;
1454
Willy Tarreauf50ec0f2015-09-29 18:11:32 +02001455 /* We're on the client-facing side, we must force to disable lingering to
1456 * ensure we will use an RST exclusively and kill any pending data.
1457 */
1458 fdtab[conn->t.sock.fd].linger_risk = 1;
1459
Willy Tarreau2d392c22015-08-24 01:43:45 +02001460#ifdef TCP_REPAIR
1461 if (setsockopt(conn->t.sock.fd, SOL_TCP, TCP_REPAIR, &one, sizeof(one)) == 0) {
1462 /* socket will be quiet now */
1463 goto out;
1464 }
1465#endif
1466 /* either TCP_REPAIR is not defined or it failed (eg: permissions).
1467 * Let's fall back on the TTL trick, though it only works for routed
1468 * network and has no effect on local net.
1469 */
1470#ifdef IP_TTL
1471 setsockopt(conn->t.sock.fd, SOL_IP, IP_TTL, &one, sizeof(one));
1472#endif
1473 out:
1474 /* kill the stream if any */
1475 if (strm) {
1476 channel_abort(&strm->req);
1477 channel_abort(&strm->res);
1478 strm->req.analysers = 0;
1479 strm->res.analysers = 0;
1480 strm->be->be_counters.denied_req++;
1481 if (!(strm->flags & SF_ERR_MASK))
1482 strm->flags |= SF_ERR_PRXCOND;
1483 if (!(strm->flags & SF_FINST_MASK))
1484 strm->flags |= SF_FINST_R;
1485 }
1486
1487 sess->fe->fe_counters.denied_req++;
1488 if (sess->listener->counters)
1489 sess->listener->counters->denied_req++;
1490
1491 return ACT_RET_STOP;
1492}
1493
Emeric Brun97679e72010-09-23 17:56:44 +02001494/* Parse a tcp-response rule. Return a negative value in case of failure */
1495static int tcp_parse_response_rule(char **args, int arg, int section_type,
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001496 struct proxy *curpx, struct proxy *defpx,
Thierry FOURNIERa28a9422015-08-04 19:35:46 +02001497 struct act_rule *rule, char **err,
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001498 unsigned int where,
1499 const char *file, int line)
Emeric Brun97679e72010-09-23 17:56:44 +02001500{
1501 if (curpx == defpx || !(curpx->cap & PR_CAP_BE)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001502 memprintf(err, "%s %s is only allowed in 'backend' sections",
1503 args[0], args[1]);
Emeric Brun97679e72010-09-23 17:56:44 +02001504 return -1;
1505 }
1506
1507 if (strcmp(args[arg], "accept") == 0) {
1508 arg++;
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001509 rule->action = ACT_ACTION_ALLOW;
Emeric Brun97679e72010-09-23 17:56:44 +02001510 }
1511 else if (strcmp(args[arg], "reject") == 0) {
1512 arg++;
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001513 rule->action = ACT_ACTION_DENY;
Emeric Brun97679e72010-09-23 17:56:44 +02001514 }
Willy Tarreaucc1e04b2013-09-11 23:20:29 +02001515 else if (strcmp(args[arg], "close") == 0) {
1516 arg++;
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001517 rule->action = ACT_TCP_CLOSE;
Willy Tarreaucc1e04b2013-09-11 23:20:29 +02001518 }
Emeric Brun97679e72010-09-23 17:56:44 +02001519 else {
Thierry FOURNIER36481b82015-08-19 09:01:53 +02001520 struct action_kw *kw;
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001521 kw = tcp_res_cont_action(args[arg]);
1522 if (kw) {
1523 arg++;
Thierry FOURNIER5563e4b2015-08-14 19:20:07 +02001524 rule->from = ACT_F_TCP_RES_CNT;
Thierry FOURNIER85c6c972015-09-22 19:14:35 +02001525 rule->kw = kw;
Thierry FOURNIERafa80492015-08-19 09:04:15 +02001526 if (kw->parse((const char **)args, &arg, curpx, rule, err) == ACT_RET_PRS_ERR)
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001527 return -1;
1528 } else {
Thierry FOURNIERab95e652015-10-02 08:24:51 +02001529 action_build_list(&tcp_res_cont_keywords, &trash);
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001530 memprintf(err,
Thierry FOURNIERab95e652015-10-02 08:24:51 +02001531 "'%s %s' expects 'accept', 'close', 'reject', %s in %s '%s' (got '%s')",
1532 args[0], args[1], trash.str, proxy_type_str(curpx), curpx->id, args[arg]);
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001533 return -1;
1534 }
Emeric Brun97679e72010-09-23 17:56:44 +02001535 }
1536
1537 if (strcmp(args[arg], "if") == 0 || strcmp(args[arg], "unless") == 0) {
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001538 if ((rule->cond = build_acl_cond(file, line, curpx, (const char **)args+arg, err)) == NULL) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001539 memprintf(err,
1540 "'%s %s %s' : error detected in %s '%s' while parsing '%s' condition : %s",
1541 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg], *err);
Emeric Brun97679e72010-09-23 17:56:44 +02001542 return -1;
1543 }
1544 }
1545 else if (*args[arg]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001546 memprintf(err,
1547 "'%s %s %s' only accepts 'if' or 'unless', in %s '%s' (got '%s')",
Emeric Brun97679e72010-09-23 17:56:44 +02001548 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg]);
1549 return -1;
1550 }
1551 return 0;
1552}
1553
1554
1555
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001556/* Parse a tcp-request rule. Return a negative value in case of failure */
1557static int tcp_parse_request_rule(char **args, int arg, int section_type,
Willy Tarreau80aca902013-01-07 15:42:20 +01001558 struct proxy *curpx, struct proxy *defpx,
Thierry FOURNIERa28a9422015-08-04 19:35:46 +02001559 struct act_rule *rule, char **err,
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001560 unsigned int where, const char *file, int line)
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001561{
1562 if (curpx == defpx) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001563 memprintf(err, "%s %s is not allowed in 'defaults' sections",
1564 args[0], args[1]);
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001565 return -1;
1566 }
1567
1568 if (!strcmp(args[arg], "accept")) {
1569 arg++;
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001570 rule->action = ACT_ACTION_ALLOW;
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001571 }
1572 else if (!strcmp(args[arg], "reject")) {
1573 arg++;
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001574 rule->action = ACT_ACTION_DENY;
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001575 }
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001576 else if (strcmp(args[arg], "capture") == 0) {
1577 struct sample_expr *expr;
1578 struct cap_hdr *hdr;
1579 int kw = arg;
1580 int len = 0;
1581
1582 if (!(curpx->cap & PR_CAP_FE)) {
1583 memprintf(err,
1584 "'%s %s %s' : proxy '%s' has no frontend capability",
1585 args[0], args[1], args[kw], curpx->id);
1586 return -1;
1587 }
1588
1589 if (!(where & SMP_VAL_FE_REQ_CNT)) {
1590 memprintf(err,
1591 "'%s %s' is not allowed in '%s %s' rules in %s '%s'",
1592 args[arg], args[arg+1], args[0], args[1], proxy_type_str(curpx), curpx->id);
1593 return -1;
1594 }
1595
1596 arg++;
1597
1598 curpx->conf.args.ctx = ARGC_CAP;
1599 expr = sample_parse_expr(args, &arg, file, line, err, &curpx->conf.args);
1600 if (!expr) {
1601 memprintf(err,
1602 "'%s %s %s' : %s",
1603 args[0], args[1], args[kw], *err);
1604 return -1;
1605 }
1606
1607 if (!(expr->fetch->val & where)) {
1608 memprintf(err,
1609 "'%s %s %s' : fetch method '%s' extracts information from '%s', none of which is available here",
1610 args[0], args[1], args[kw], args[arg-1], sample_src_names(expr->fetch->use));
1611 free(expr);
1612 return -1;
1613 }
1614
1615 if (strcmp(args[arg], "len") == 0) {
1616 arg++;
1617 if (!args[arg]) {
1618 memprintf(err,
1619 "'%s %s %s' : missing length value",
1620 args[0], args[1], args[kw]);
1621 free(expr);
1622 return -1;
1623 }
1624 /* we copy the table name for now, it will be resolved later */
1625 len = atoi(args[arg]);
1626 if (len <= 0) {
1627 memprintf(err,
1628 "'%s %s %s' : length must be > 0",
1629 args[0], args[1], args[kw]);
1630 free(expr);
1631 return -1;
1632 }
1633 arg++;
1634 }
1635
1636 if (!len) {
1637 memprintf(err,
1638 "'%s %s %s' : a positive 'len' argument is mandatory",
1639 args[0], args[1], args[kw]);
1640 free(expr);
1641 return -1;
1642 }
1643
1644 hdr = calloc(sizeof(struct cap_hdr), 1);
1645 hdr->next = curpx->req_cap;
1646 hdr->name = NULL; /* not a header capture */
1647 hdr->namelen = 0;
1648 hdr->len = len;
1649 hdr->pool = create_pool("caphdr", hdr->len + 1, MEM_F_SHARED);
1650 hdr->index = curpx->nb_req_cap++;
1651
1652 curpx->req_cap = hdr;
1653 curpx->to_log |= LW_REQHDR;
1654
1655 /* check if we need to allocate an hdr_idx struct for HTTP parsing */
1656 curpx->http_needed |= !!(expr->fetch->use & SMP_USE_HTTP_ANY);
1657
Thierry FOURNIERd0d65ae2015-08-04 08:21:12 +02001658 rule->arg.cap.expr = expr;
1659 rule->arg.cap.hdr = hdr;
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001660 rule->action = ACT_TCP_CAPTURE;
Willy Tarreau18bf01e2014-06-13 16:18:52 +02001661 }
Willy Tarreaub4c84932013-07-23 19:15:30 +02001662 else if (strncmp(args[arg], "track-sc", 8) == 0 &&
1663 args[arg][9] == '\0' && args[arg][8] >= '0' &&
Willy Tarreaue1cfc1f2014-10-17 11:53:05 +02001664 args[arg][8] < '0' + MAX_SESS_STKCTR) { /* track-sc 0..9 */
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001665 struct sample_expr *expr;
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001666 int kw = arg;
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001667
1668 arg++;
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001669
Willy Tarreaua4312fa2013-04-02 16:34:32 +02001670 curpx->conf.args.ctx = ARGC_TRK;
Thierry FOURNIEReeaa9512014-02-11 14:00:19 +01001671 expr = sample_parse_expr(args, &arg, file, line, err, &curpx->conf.args);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001672 if (!expr) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001673 memprintf(err,
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001674 "'%s %s %s' : %s",
Willy Tarreau975c1782013-12-12 23:16:54 +01001675 args[0], args[1], args[kw], *err);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001676 return -1;
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001677 }
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001678
Willy Tarreau80aca902013-01-07 15:42:20 +01001679 if (!(expr->fetch->val & where)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001680 memprintf(err,
Willy Tarreau80aca902013-01-07 15:42:20 +01001681 "'%s %s %s' : fetch method '%s' extracts information from '%s', none of which is available here",
Willy Tarreau33c60de2013-04-12 08:26:32 +02001682 args[0], args[1], args[kw], args[arg-1], sample_src_names(expr->fetch->use));
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001683 free(expr);
1684 return -1;
1685 }
1686
1687 /* check if we need to allocate an hdr_idx struct for HTTP parsing */
Willy Tarreau25320b22013-03-24 07:22:08 +01001688 curpx->http_needed |= !!(expr->fetch->use & SMP_USE_HTTP_ANY);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001689
1690 if (strcmp(args[arg], "table") == 0) {
Willy Tarreau598718a2012-12-09 16:57:27 +01001691 arg++;
1692 if (!args[arg]) {
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001693 memprintf(err,
1694 "'%s %s %s' : missing table name",
1695 args[0], args[1], args[kw]);
1696 free(expr);
1697 return -1;
1698 }
1699 /* we copy the table name for now, it will be resolved later */
Thierry FOURNIER5ec63e02015-08-04 09:09:48 +02001700 rule->arg.trk_ctr.table.n = strdup(args[arg]);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001701 arg++;
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001702 }
Thierry FOURNIER5ec63e02015-08-04 09:09:48 +02001703 rule->arg.trk_ctr.expr = expr;
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001704 rule->action = ACT_ACTION_TRK_SC0 + args[kw][8] - '0';
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001705 }
Willy Tarreau4f0d9192013-06-11 20:40:55 +02001706 else if (strcmp(args[arg], "expect-proxy") == 0) {
1707 if (strcmp(args[arg+1], "layer4") != 0) {
1708 memprintf(err,
1709 "'%s %s %s' only supports 'layer4' in %s '%s' (got '%s')",
1710 args[0], args[1], args[arg], proxy_type_str(curpx), curpx->id, args[arg+1]);
1711 return -1;
1712 }
1713
1714 if (!(where & SMP_VAL_FE_CON_ACC)) {
1715 memprintf(err,
1716 "'%s %s' is not allowed in '%s %s' rules in %s '%s'",
1717 args[arg], args[arg+1], args[0], args[1], proxy_type_str(curpx), curpx->id);
1718 return -1;
1719 }
1720
1721 arg += 2;
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +02001722 rule->action = ACT_TCP_EXPECT_PX;
Willy Tarreau4f0d9192013-06-11 20:40:55 +02001723 }
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001724 else {
Thierry FOURNIER36481b82015-08-19 09:01:53 +02001725 struct action_kw *kw;
Thierry FOURNIER5563e4b2015-08-14 19:20:07 +02001726 if (where & SMP_VAL_FE_CON_ACC) {
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001727 kw = tcp_req_conn_action(args[arg]);
Thierry FOURNIER85c6c972015-09-22 19:14:35 +02001728 rule->kw = kw;
Thierry FOURNIER5563e4b2015-08-14 19:20:07 +02001729 rule->from = ACT_F_TCP_REQ_CON;
1730 } else {
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001731 kw = tcp_req_cont_action(args[arg]);
Thierry FOURNIER85c6c972015-09-22 19:14:35 +02001732 rule->kw = kw;
Thierry FOURNIER5563e4b2015-08-14 19:20:07 +02001733 rule->from = ACT_F_TCP_REQ_CNT;
1734 }
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001735 if (kw) {
1736 arg++;
Thierry FOURNIERafa80492015-08-19 09:04:15 +02001737 if (kw->parse((const char **)args, &arg, curpx, rule, err) == ACT_RET_PRS_ERR)
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001738 return -1;
1739 } else {
Thierry FOURNIERab95e652015-10-02 08:24:51 +02001740 if (where & SMP_VAL_FE_CON_ACC)
1741 action_build_list(&tcp_req_conn_keywords, &trash);
1742 else
1743 action_build_list(&tcp_req_cont_keywords, &trash);
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001744 memprintf(err,
Thierry FOURNIERab95e652015-10-02 08:24:51 +02001745 "'%s %s' expects 'accept', 'reject', 'track-sc0' ... 'track-sc%d', %s "
1746 "in %s '%s' (got '%s').\n",
1747 args[0], args[1], MAX_SESS_STKCTR-1, trash.str, proxy_type_str(curpx),
Thierry FOURNIERcc87a112014-12-12 19:41:33 +01001748 curpx->id, args[arg]);
1749 return -1;
1750 }
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001751 }
1752
1753 if (strcmp(args[arg], "if") == 0 || strcmp(args[arg], "unless") == 0) {
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001754 if ((rule->cond = build_acl_cond(file, line, curpx, (const char **)args+arg, err)) == NULL) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001755 memprintf(err,
1756 "'%s %s %s' : error detected in %s '%s' while parsing '%s' condition : %s",
1757 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg], *err);
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001758 return -1;
1759 }
1760 }
1761 else if (*args[arg]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001762 memprintf(err,
1763 "'%s %s %s' only accepts 'if' or 'unless', in %s '%s' (got '%s')",
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001764 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg]);
1765 return -1;
1766 }
1767 return 0;
1768}
1769
Emeric Brun97679e72010-09-23 17:56:44 +02001770/* This function should be called to parse a line starting with the "tcp-response"
1771 * keyword.
1772 */
1773static int tcp_parse_tcp_rep(char **args, int section_type, struct proxy *curpx,
Willy Tarreau28a47d62012-09-18 20:02:48 +02001774 struct proxy *defpx, const char *file, int line,
1775 char **err)
Emeric Brun97679e72010-09-23 17:56:44 +02001776{
1777 const char *ptr = NULL;
1778 unsigned int val;
Emeric Brun97679e72010-09-23 17:56:44 +02001779 int warn = 0;
1780 int arg;
Thierry FOURNIERa28a9422015-08-04 19:35:46 +02001781 struct act_rule *rule;
Willy Tarreau80aca902013-01-07 15:42:20 +01001782 unsigned int where;
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001783 const struct acl *acl;
Willy Tarreau93fddf12013-03-31 22:59:32 +02001784 const char *kw;
Emeric Brun97679e72010-09-23 17:56:44 +02001785
1786 if (!*args[1]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001787 memprintf(err, "missing argument for '%s' in %s '%s'",
1788 args[0], proxy_type_str(curpx), curpx->id);
Emeric Brun97679e72010-09-23 17:56:44 +02001789 return -1;
1790 }
1791
1792 if (strcmp(args[1], "inspect-delay") == 0) {
1793 if (curpx == defpx || !(curpx->cap & PR_CAP_BE)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001794 memprintf(err, "%s %s is only allowed in 'backend' sections",
1795 args[0], args[1]);
Emeric Brun97679e72010-09-23 17:56:44 +02001796 return -1;
1797 }
1798
1799 if (!*args[2] || (ptr = parse_time_err(args[2], &val, TIME_UNIT_MS))) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001800 memprintf(err,
1801 "'%s %s' expects a positive delay in milliseconds, in %s '%s'",
1802 args[0], args[1], proxy_type_str(curpx), curpx->id);
1803 if (ptr)
1804 memprintf(err, "%s (unexpected character '%c')", *err, *ptr);
Emeric Brun97679e72010-09-23 17:56:44 +02001805 return -1;
1806 }
1807
1808 if (curpx->tcp_rep.inspect_delay) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001809 memprintf(err, "ignoring %s %s (was already defined) in %s '%s'",
1810 args[0], args[1], proxy_type_str(curpx), curpx->id);
Emeric Brun97679e72010-09-23 17:56:44 +02001811 return 1;
1812 }
1813 curpx->tcp_rep.inspect_delay = val;
1814 return 0;
1815 }
1816
Simon Hormande072bd2011-06-24 15:11:37 +09001817 rule = calloc(1, sizeof(*rule));
Emeric Brun97679e72010-09-23 17:56:44 +02001818 LIST_INIT(&rule->list);
1819 arg = 1;
Willy Tarreau80aca902013-01-07 15:42:20 +01001820 where = 0;
Emeric Brun97679e72010-09-23 17:56:44 +02001821
1822 if (strcmp(args[1], "content") == 0) {
1823 arg++;
Willy Tarreau80aca902013-01-07 15:42:20 +01001824
1825 if (curpx->cap & PR_CAP_FE)
1826 where |= SMP_VAL_FE_RES_CNT;
1827 if (curpx->cap & PR_CAP_BE)
1828 where |= SMP_VAL_BE_RES_CNT;
1829
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001830 if (tcp_parse_response_rule(args, arg, section_type, curpx, defpx, rule, err, where, file, line) < 0)
Emeric Brun97679e72010-09-23 17:56:44 +02001831 goto error;
1832
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001833 acl = rule->cond ? acl_cond_conflicts(rule->cond, where) : NULL;
1834 if (acl) {
1835 if (acl->name && *acl->name)
1836 memprintf(err,
1837 "acl '%s' will never match in '%s %s' because it only involves keywords that are incompatible with '%s'",
1838 acl->name, args[0], args[1], sample_ckp_names(where));
1839 else
1840 memprintf(err,
1841 "anonymous acl will never match in '%s %s' because it uses keyword '%s' which is incompatible with '%s'",
1842 args[0], args[1],
Willy Tarreau93fddf12013-03-31 22:59:32 +02001843 LIST_ELEM(acl->expr.n, struct acl_expr *, list)->kw,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001844 sample_ckp_names(where));
Emeric Brun97679e72010-09-23 17:56:44 +02001845
Emeric Brun97679e72010-09-23 17:56:44 +02001846 warn++;
1847 }
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001848 else if (rule->cond && acl_cond_kw_conflicts(rule->cond, where, &acl, &kw)) {
1849 if (acl->name && *acl->name)
1850 memprintf(err,
1851 "acl '%s' involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001852 acl->name, kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001853 else
1854 memprintf(err,
1855 "anonymous acl involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001856 kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001857 warn++;
1858 }
Emeric Brun97679e72010-09-23 17:56:44 +02001859
1860 LIST_ADDQ(&curpx->tcp_rep.inspect_rules, &rule->list);
1861 }
1862 else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001863 memprintf(err,
1864 "'%s' expects 'inspect-delay' or 'content' in %s '%s' (got '%s')",
1865 args[0], proxy_type_str(curpx), curpx->id, args[1]);
Emeric Brun97679e72010-09-23 17:56:44 +02001866 goto error;
1867 }
1868
1869 return warn;
1870 error:
1871 free(rule);
1872 return -1;
1873}
1874
1875
Willy Tarreaub6866442008-07-14 23:54:42 +02001876/* This function should be called to parse a line starting with the "tcp-request"
1877 * keyword.
1878 */
1879static int tcp_parse_tcp_req(char **args, int section_type, struct proxy *curpx,
Willy Tarreau28a47d62012-09-18 20:02:48 +02001880 struct proxy *defpx, const char *file, int line,
1881 char **err)
Willy Tarreaub6866442008-07-14 23:54:42 +02001882{
1883 const char *ptr = NULL;
Willy Tarreauc7e961e2008-08-17 17:13:47 +02001884 unsigned int val;
Willy Tarreau1a687942010-05-23 22:40:30 +02001885 int warn = 0;
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001886 int arg;
Thierry FOURNIERa28a9422015-08-04 19:35:46 +02001887 struct act_rule *rule;
Willy Tarreau80aca902013-01-07 15:42:20 +01001888 unsigned int where;
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001889 const struct acl *acl;
Willy Tarreau93fddf12013-03-31 22:59:32 +02001890 const char *kw;
Willy Tarreaub6866442008-07-14 23:54:42 +02001891
1892 if (!*args[1]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001893 if (curpx == defpx)
1894 memprintf(err, "missing argument for '%s' in defaults section", args[0]);
1895 else
1896 memprintf(err, "missing argument for '%s' in %s '%s'",
1897 args[0], proxy_type_str(curpx), curpx->id);
Willy Tarreaub6866442008-07-14 23:54:42 +02001898 return -1;
1899 }
1900
1901 if (!strcmp(args[1], "inspect-delay")) {
1902 if (curpx == defpx) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001903 memprintf(err, "%s %s is not allowed in 'defaults' sections",
1904 args[0], args[1]);
Willy Tarreaub6866442008-07-14 23:54:42 +02001905 return -1;
1906 }
1907
Willy Tarreaub6866442008-07-14 23:54:42 +02001908 if (!*args[2] || (ptr = parse_time_err(args[2], &val, TIME_UNIT_MS))) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001909 memprintf(err,
1910 "'%s %s' expects a positive delay in milliseconds, in %s '%s'",
1911 args[0], args[1], proxy_type_str(curpx), curpx->id);
1912 if (ptr)
1913 memprintf(err, "%s (unexpected character '%c')", *err, *ptr);
Willy Tarreaub6866442008-07-14 23:54:42 +02001914 return -1;
1915 }
1916
1917 if (curpx->tcp_req.inspect_delay) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001918 memprintf(err, "ignoring %s %s (was already defined) in %s '%s'",
1919 args[0], args[1], proxy_type_str(curpx), curpx->id);
Willy Tarreaub6866442008-07-14 23:54:42 +02001920 return 1;
1921 }
1922 curpx->tcp_req.inspect_delay = val;
1923 return 0;
1924 }
1925
Simon Hormande072bd2011-06-24 15:11:37 +09001926 rule = calloc(1, sizeof(*rule));
Willy Tarreaufb024dc2010-08-20 13:35:41 +02001927 LIST_INIT(&rule->list);
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001928 arg = 1;
Willy Tarreau80aca902013-01-07 15:42:20 +01001929 where = 0;
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001930
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001931 if (strcmp(args[1], "content") == 0) {
Willy Tarreaud1f96522010-08-03 19:34:32 +02001932 arg++;
Willy Tarreau80aca902013-01-07 15:42:20 +01001933
1934 if (curpx->cap & PR_CAP_FE)
1935 where |= SMP_VAL_FE_REQ_CNT;
1936 if (curpx->cap & PR_CAP_BE)
1937 where |= SMP_VAL_BE_REQ_CNT;
1938
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001939 if (tcp_parse_request_rule(args, arg, section_type, curpx, defpx, rule, err, where, file, line) < 0)
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001940 goto error;
Willy Tarreaub6866442008-07-14 23:54:42 +02001941
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001942 acl = rule->cond ? acl_cond_conflicts(rule->cond, where) : NULL;
1943 if (acl) {
1944 if (acl->name && *acl->name)
1945 memprintf(err,
1946 "acl '%s' will never match in '%s %s' because it only involves keywords that are incompatible with '%s'",
1947 acl->name, args[0], args[1], sample_ckp_names(where));
1948 else
1949 memprintf(err,
1950 "anonymous acl will never match in '%s %s' because it uses keyword '%s' which is incompatible with '%s'",
1951 args[0], args[1],
Willy Tarreau93fddf12013-03-31 22:59:32 +02001952 LIST_ELEM(acl->expr.n, struct acl_expr *, list)->kw,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001953 sample_ckp_names(where));
Willy Tarreaudd64f8d2008-07-27 22:02:32 +02001954
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001955 warn++;
1956 }
1957 else if (rule->cond && acl_cond_kw_conflicts(rule->cond, where, &acl, &kw)) {
1958 if (acl->name && *acl->name)
1959 memprintf(err,
1960 "acl '%s' involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001961 acl->name, kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001962 else
1963 memprintf(err,
1964 "anonymous acl involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001965 kw, sample_ckp_names(where));
Willy Tarreaudd64f8d2008-07-27 22:02:32 +02001966 warn++;
1967 }
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001968
Willy Tarreau3986b9c2014-09-16 15:39:51 +02001969 /* the following function directly emits the warning */
1970 warnif_misplaced_tcp_cont(curpx, file, line, args[0]);
Willy Tarreaufb024dc2010-08-20 13:35:41 +02001971 LIST_ADDQ(&curpx->tcp_req.inspect_rules, &rule->list);
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001972 }
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001973 else if (strcmp(args[1], "connection") == 0) {
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001974 arg++;
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001975
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001976 if (!(curpx->cap & PR_CAP_FE)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001977 memprintf(err, "%s %s is not allowed because %s %s is not a frontend",
1978 args[0], args[1], proxy_type_str(curpx), curpx->id);
Simon Horman6c54d8b2011-07-15 13:14:06 +09001979 goto error;
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001980 }
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001981
Willy Tarreau80aca902013-01-07 15:42:20 +01001982 where |= SMP_VAL_FE_CON_ACC;
1983
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001984 if (tcp_parse_request_rule(args, arg, section_type, curpx, defpx, rule, err, where, file, line) < 0)
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001985 goto error;
1986
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001987 acl = rule->cond ? acl_cond_conflicts(rule->cond, where) : NULL;
1988 if (acl) {
1989 if (acl->name && *acl->name)
1990 memprintf(err,
1991 "acl '%s' will never match in '%s %s' because it only involves keywords that are incompatible with '%s'",
1992 acl->name, args[0], args[1], sample_ckp_names(where));
1993 else
1994 memprintf(err,
1995 "anonymous acl will never match in '%s %s' because it uses keyword '%s' which is incompatible with '%s'",
1996 args[0], args[1],
Willy Tarreau93fddf12013-03-31 22:59:32 +02001997 LIST_ELEM(acl->expr.n, struct acl_expr *, list)->kw,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001998 sample_ckp_names(where));
Willy Tarreauf059a0f2010-08-03 16:29:52 +02001999
Willy Tarreaua91d0a52013-03-25 08:12:18 +01002000 warn++;
2001 }
2002 else if (rule->cond && acl_cond_kw_conflicts(rule->cond, where, &acl, &kw)) {
2003 if (acl->name && *acl->name)
Willy Tarreau0a3dd742012-05-08 19:47:01 +02002004 memprintf(err,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01002005 "acl '%s' involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02002006 acl->name, kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01002007 else
Willy Tarreau0a3dd742012-05-08 19:47:01 +02002008 memprintf(err,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01002009 "anonymous acl involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02002010 kw, sample_ckp_names(where));
Willy Tarreau68c03ab2010-08-06 15:08:45 +02002011 warn++;
2012 }
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01002013
Willy Tarreau3986b9c2014-09-16 15:39:51 +02002014 /* the following function directly emits the warning */
2015 warnif_misplaced_tcp_conn(curpx, file, line, args[0]);
Willy Tarreaufb024dc2010-08-20 13:35:41 +02002016 LIST_ADDQ(&curpx->tcp_req.l4_rules, &rule->list);
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02002017 }
Willy Tarreau1a687942010-05-23 22:40:30 +02002018 else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02002019 if (curpx == defpx)
2020 memprintf(err,
2021 "'%s' expects 'inspect-delay', 'connection', or 'content' in defaults section (got '%s')",
2022 args[0], args[1]);
2023 else
2024 memprintf(err,
2025 "'%s' expects 'inspect-delay', 'connection', or 'content' in %s '%s' (got '%s')",
Willy Tarreaudeaec2f2013-04-10 16:31:11 +02002026 args[0], proxy_type_str(curpx), curpx->id, args[1]);
Willy Tarreau6a984fa2010-06-14 16:44:27 +02002027 goto error;
Willy Tarreau1a687942010-05-23 22:40:30 +02002028 }
2029
Willy Tarreau1a687942010-05-23 22:40:30 +02002030 return warn;
Willy Tarreau6a984fa2010-06-14 16:44:27 +02002031 error:
2032 free(rule);
2033 return -1;
Willy Tarreaub6866442008-07-14 23:54:42 +02002034}
2035
Willy Tarreau2d392c22015-08-24 01:43:45 +02002036/* Parse a "silent-drop" action. It takes no argument. It returns ACT_RET_PRS_OK on
2037 * success, ACT_RET_PRS_ERR on error.
2038 */
2039static enum act_parse_ret tcp_parse_silent_drop(const char **args, int *orig_arg, struct proxy *px,
2040 struct act_rule *rule, char **err)
2041{
2042 rule->action = ACT_CUSTOM;
2043 rule->action_ptr = tcp_exec_action_silent_drop;
2044 return ACT_RET_PRS_OK;
2045}
2046
Willy Tarreau645513a2010-05-24 20:55:15 +02002047
2048/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002049/* All supported sample fetch functions must be declared here */
Willy Tarreau32389b72012-04-23 23:13:20 +02002050/************************************************************************/
2051
Willy Tarreau4a129812012-04-25 17:31:42 +02002052/* fetch the connection's source IPv4/IPv6 address */
Thierry FOURNIERa123ad82015-07-24 09:12:15 +02002053int smp_fetch_src(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02002054{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002055 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02002056
2057 if (!cli_conn)
2058 return 0;
2059
2060 switch (cli_conn->addr.from.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01002061 case AF_INET:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002062 smp->data.u.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002063 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01002064 break;
2065 case AF_INET6:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002066 smp->data.u.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002067 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01002068 break;
2069 default:
Emeric Brunf769f512010-10-22 17:14:01 +02002070 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01002071 }
Emeric Brunf769f512010-10-22 17:14:01 +02002072
Willy Tarreau37406352012-04-23 16:16:37 +02002073 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02002074 return 1;
2075}
2076
Willy Tarreaua5e37562011-12-16 17:06:15 +01002077/* set temp integer to the connection's source port */
Willy Tarreau645513a2010-05-24 20:55:15 +02002078static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002079smp_fetch_sport(const struct arg *args, struct sample *smp, const char *k, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02002080{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002081 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02002082
2083 if (!cli_conn)
2084 return 0;
2085
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002086 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002087 if (!(smp->data.u.sint = get_host_port(&cli_conn->addr.from)))
Emeric Brunf769f512010-10-22 17:14:01 +02002088 return 0;
2089
Willy Tarreau37406352012-04-23 16:16:37 +02002090 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02002091 return 1;
2092}
2093
Willy Tarreau4a129812012-04-25 17:31:42 +02002094/* fetch the connection's destination IPv4/IPv6 address */
Willy Tarreau645513a2010-05-24 20:55:15 +02002095static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002096smp_fetch_dst(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02002097{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002098 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreau645513a2010-05-24 20:55:15 +02002099
Willy Tarreaub363a1f2013-10-01 10:45:07 +02002100 if (!cli_conn)
2101 return 0;
2102
2103 conn_get_to_addr(cli_conn);
2104
2105 switch (cli_conn->addr.to.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01002106 case AF_INET:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002107 smp->data.u.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002108 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01002109 break;
2110 case AF_INET6:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002111 smp->data.u.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002112 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01002113 break;
2114 default:
Emeric Brunf769f512010-10-22 17:14:01 +02002115 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01002116 }
Emeric Brunf769f512010-10-22 17:14:01 +02002117
Willy Tarreau37406352012-04-23 16:16:37 +02002118 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02002119 return 1;
2120}
2121
Willy Tarreaua5e37562011-12-16 17:06:15 +01002122/* set temp integer to the frontend connexion's destination port */
Willy Tarreau645513a2010-05-24 20:55:15 +02002123static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002124smp_fetch_dport(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02002125{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002126 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02002127
2128 if (!cli_conn)
2129 return 0;
2130
2131 conn_get_to_addr(cli_conn);
Willy Tarreau645513a2010-05-24 20:55:15 +02002132
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002133 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002134 if (!(smp->data.u.sint = get_host_port(&cli_conn->addr.to)))
Emeric Brunf769f512010-10-22 17:14:01 +02002135 return 0;
2136
Willy Tarreau37406352012-04-23 16:16:37 +02002137 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02002138 return 1;
Emericf2d7cae2010-11-05 18:13:50 +01002139}
2140
Willy Tarreau9b6700f2012-11-24 11:55:28 +01002141#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01002142/* parse the "v4v6" bind keyword */
2143static int bind_parse_v4v6(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
2144{
2145 struct listener *l;
2146
2147 list_for_each_entry(l, &conf->listeners, by_bind) {
2148 if (l->addr.ss_family == AF_INET6)
2149 l->options |= LI_O_V4V6;
2150 }
2151
2152 return 0;
2153}
2154
Willy Tarreau9b6700f2012-11-24 11:55:28 +01002155/* parse the "v6only" bind keyword */
2156static int bind_parse_v6only(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
2157{
2158 struct listener *l;
2159
2160 list_for_each_entry(l, &conf->listeners, by_bind) {
2161 if (l->addr.ss_family == AF_INET6)
2162 l->options |= LI_O_V6ONLY;
2163 }
2164
2165 return 0;
2166}
2167#endif
2168
Pieter Baauwd551fb52013-05-08 22:49:23 +02002169#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02002170/* parse the "transparent" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02002171static 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 +02002172{
2173 struct listener *l;
2174
Willy Tarreau4348fad2012-09-20 16:48:07 +02002175 list_for_each_entry(l, &conf->listeners, by_bind) {
2176 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
2177 l->options |= LI_O_FOREIGN;
Willy Tarreau44791242012-09-12 23:27:21 +02002178 }
2179
Willy Tarreau44791242012-09-12 23:27:21 +02002180 return 0;
2181}
2182#endif
2183
2184#ifdef TCP_DEFER_ACCEPT
2185/* parse the "defer-accept" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02002186static 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 +02002187{
2188 struct listener *l;
2189
Willy Tarreau4348fad2012-09-20 16:48:07 +02002190 list_for_each_entry(l, &conf->listeners, by_bind) {
2191 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
2192 l->options |= LI_O_DEF_ACCEPT;
Willy Tarreau44791242012-09-12 23:27:21 +02002193 }
2194
Willy Tarreau44791242012-09-12 23:27:21 +02002195 return 0;
2196}
2197#endif
2198
Willy Tarreau1c862c52012-10-05 16:21:00 +02002199#ifdef TCP_FASTOPEN
Lukas Tribus0defb902013-02-13 23:35:39 +01002200/* parse the "tfo" bind keyword */
Willy Tarreau1c862c52012-10-05 16:21:00 +02002201static int bind_parse_tfo(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
2202{
2203 struct listener *l;
2204
2205 list_for_each_entry(l, &conf->listeners, by_bind) {
2206 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
2207 l->options |= LI_O_TCP_FO;
2208 }
2209
2210 return 0;
2211}
2212#endif
2213
Willy Tarreau44791242012-09-12 23:27:21 +02002214#ifdef TCP_MAXSEG
2215/* parse the "mss" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02002216static 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 +02002217{
2218 struct listener *l;
2219 int mss;
2220
Willy Tarreau44791242012-09-12 23:27:21 +02002221 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02002222 memprintf(err, "'%s' : missing MSS value", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02002223 return ERR_ALERT | ERR_FATAL;
2224 }
2225
2226 mss = atoi(args[cur_arg + 1]);
2227 if (!mss || abs(mss) > 65535) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02002228 memprintf(err, "'%s' : expects an MSS with and absolute value between 1 and 65535", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02002229 return ERR_ALERT | ERR_FATAL;
2230 }
2231
Willy Tarreau4348fad2012-09-20 16:48:07 +02002232 list_for_each_entry(l, &conf->listeners, by_bind) {
2233 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
2234 l->maxseg = mss;
2235 }
Willy Tarreau44791242012-09-12 23:27:21 +02002236
2237 return 0;
2238}
2239#endif
2240
Willy Tarreau2af207a2015-02-04 00:45:58 +01002241#ifdef TCP_USER_TIMEOUT
2242/* parse the "tcp-ut" bind keyword */
2243static int bind_parse_tcp_ut(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
2244{
2245 const char *ptr = NULL;
2246 struct listener *l;
2247 unsigned int timeout;
2248
2249 if (!*args[cur_arg + 1]) {
2250 memprintf(err, "'%s' : missing TCP User Timeout value", args[cur_arg]);
2251 return ERR_ALERT | ERR_FATAL;
2252 }
2253
2254 ptr = parse_time_err(args[cur_arg + 1], &timeout, TIME_UNIT_MS);
2255 if (ptr) {
2256 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[cur_arg]);
2257 return ERR_ALERT | ERR_FATAL;
2258 }
2259
2260 list_for_each_entry(l, &conf->listeners, by_bind) {
2261 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
2262 l->tcp_ut = timeout;
2263 }
2264
2265 return 0;
2266}
2267#endif
2268
Willy Tarreau44791242012-09-12 23:27:21 +02002269#ifdef SO_BINDTODEVICE
Willy Tarreau2af207a2015-02-04 00:45:58 +01002270/* parse the "interface" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02002271static 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 +02002272{
2273 struct listener *l;
2274
Willy Tarreau44791242012-09-12 23:27:21 +02002275 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02002276 memprintf(err, "'%s' : missing interface name", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02002277 return ERR_ALERT | ERR_FATAL;
2278 }
2279
Willy Tarreau4348fad2012-09-20 16:48:07 +02002280 list_for_each_entry(l, &conf->listeners, by_bind) {
2281 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
2282 l->interface = strdup(args[cur_arg + 1]);
2283 }
Willy Tarreau44791242012-09-12 23:27:21 +02002284
2285 global.last_checks |= LSTCHK_NETADM;
2286 return 0;
2287}
2288#endif
2289
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01002290#ifdef CONFIG_HAP_NS
2291/* parse the "namespace" bind keyword */
2292static int bind_parse_namespace(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
2293{
2294 struct listener *l;
2295 char *namespace = NULL;
2296
2297 if (!*args[cur_arg + 1]) {
2298 memprintf(err, "'%s' : missing namespace id", args[cur_arg]);
2299 return ERR_ALERT | ERR_FATAL;
2300 }
2301 namespace = args[cur_arg + 1];
2302
2303 list_for_each_entry(l, &conf->listeners, by_bind) {
2304 l->netns = netns_store_lookup(namespace, strlen(namespace));
2305
2306 if (l->netns == NULL)
2307 l->netns = netns_store_insert(namespace);
2308
2309 if (l->netns == NULL) {
2310 Alert("Cannot open namespace '%s'.\n", args[cur_arg + 1]);
2311 return ERR_ALERT | ERR_FATAL;
2312 }
2313 }
2314 return 0;
2315}
2316#endif
2317
Willy Tarreau163d4622015-10-13 16:16:41 +02002318#ifdef TCP_USER_TIMEOUT
2319/* parse the "tcp-ut" server keyword */
2320static int srv_parse_tcp_ut(char **args, int *cur_arg, struct proxy *px, struct server *newsrv, char **err)
2321{
2322 const char *ptr = NULL;
2323 unsigned int timeout;
2324
2325 if (!*args[*cur_arg + 1]) {
2326 memprintf(err, "'%s' : missing TCP User Timeout value", args[*cur_arg]);
2327 return ERR_ALERT | ERR_FATAL;
2328 }
2329
2330 ptr = parse_time_err(args[*cur_arg + 1], &timeout, TIME_UNIT_MS);
2331 if (ptr) {
2332 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[*cur_arg]);
2333 return ERR_ALERT | ERR_FATAL;
2334 }
2335
2336 if (newsrv->addr.ss_family == AF_INET || newsrv->addr.ss_family == AF_INET6)
2337 newsrv->tcp_ut = timeout;
2338
2339 return 0;
2340}
2341#endif
2342
Willy Tarreaudc13c112013-06-21 23:16:39 +02002343static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002344 { CFG_LISTEN, "tcp-request", tcp_parse_tcp_req },
Emeric Brun97679e72010-09-23 17:56:44 +02002345 { CFG_LISTEN, "tcp-response", tcp_parse_tcp_rep },
Willy Tarreaub6866442008-07-14 23:54:42 +02002346 { 0, NULL, NULL },
2347}};
2348
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002349
Willy Tarreau61612d42012-04-19 18:42:05 +02002350/* Note: must not be declared <const> as its list will be overwritten.
2351 * Please take care of keeping this list alphabetically sorted.
2352 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002353static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002354 { /* END */ },
Willy Tarreaub6866442008-07-14 23:54:42 +02002355}};
2356
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002357
Willy Tarreau4a129812012-04-25 17:31:42 +02002358/* Note: must not be declared <const> as its list will be overwritten.
2359 * Note: fetches that may return multiple types must be declared as the lowest
2360 * common denominator, the type that can be casted into all other ones. For
2361 * instance v4/v6 must be declared v4.
2362 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002363static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002364 { "dst", smp_fetch_dst, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002365 { "dst_port", smp_fetch_dport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002366 { "src", smp_fetch_src, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002367 { "src_port", smp_fetch_sport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Willy Tarreaud4c33c82013-01-07 21:59:07 +01002368 { /* END */ },
Willy Tarreau645513a2010-05-24 20:55:15 +02002369}};
2370
Willy Tarreau44791242012-09-12 23:27:21 +02002371/************************************************************************/
2372/* All supported bind keywords must be declared here. */
2373/************************************************************************/
2374
2375/* Note: must not be declared <const> as its list will be overwritten.
2376 * Please take care of keeping this list alphabetically sorted, doing so helps
2377 * all code contributors.
2378 * Optional keywords are also declared with a NULL ->parse() function so that
2379 * the config parser can report an appropriate error when a known keyword was
2380 * not enabled.
2381 */
Willy Tarreau51fb7652012-09-18 18:24:39 +02002382static struct bind_kw_list bind_kws = { "TCP", { }, {
Willy Tarreau44791242012-09-12 23:27:21 +02002383#ifdef TCP_DEFER_ACCEPT
2384 { "defer-accept", bind_parse_defer_accept, 0 }, /* wait for some data for 1 second max before doing accept */
2385#endif
2386#ifdef SO_BINDTODEVICE
2387 { "interface", bind_parse_interface, 1 }, /* specifically bind to this interface */
2388#endif
2389#ifdef TCP_MAXSEG
2390 { "mss", bind_parse_mss, 1 }, /* set MSS of listening socket */
2391#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +01002392#ifdef TCP_USER_TIMEOUT
2393 { "tcp-ut", bind_parse_tcp_ut, 1 }, /* set User Timeout on listening socket */
2394#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +02002395#ifdef TCP_FASTOPEN
2396 { "tfo", bind_parse_tfo, 0 }, /* enable TCP_FASTOPEN of listening socket */
2397#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +02002398#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02002399 { "transparent", bind_parse_transparent, 0 }, /* transparently bind to the specified addresses */
2400#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +01002401#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01002402 { "v4v6", bind_parse_v4v6, 0 }, /* force socket to bind to IPv4+IPv6 */
Willy Tarreau9b6700f2012-11-24 11:55:28 +01002403 { "v6only", bind_parse_v6only, 0 }, /* force socket to bind to IPv6 only */
2404#endif
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01002405#ifdef CONFIG_HAP_NS
2406 { "namespace", bind_parse_namespace, 1 },
2407#endif
Willy Tarreau44791242012-09-12 23:27:21 +02002408 /* the versions with the NULL parse function*/
2409 { "defer-accept", NULL, 0 },
2410 { "interface", NULL, 1 },
2411 { "mss", NULL, 1 },
2412 { "transparent", NULL, 0 },
Willy Tarreau77e3af92012-11-24 15:07:23 +01002413 { "v4v6", NULL, 0 },
Willy Tarreau9b6700f2012-11-24 11:55:28 +01002414 { "v6only", NULL, 0 },
Willy Tarreau44791242012-09-12 23:27:21 +02002415 { NULL, NULL, 0 },
2416}};
2417
Willy Tarreau163d4622015-10-13 16:16:41 +02002418static struct srv_kw_list srv_kws = { "TCP", { }, {
2419#ifdef TCP_USER_TIMEOUT
2420 { "tcp-ut", srv_parse_tcp_ut, 1, 0 }, /* set TCP user timeout on server */
2421#endif
2422 { NULL, NULL, 0 },
2423}};
Willy Tarreau2d392c22015-08-24 01:43:45 +02002424
2425static struct action_kw_list tcp_req_conn_actions = {ILH, {
2426 { "silent-drop", tcp_parse_silent_drop },
2427 { /* END */ }
2428}};
2429
2430static struct action_kw_list tcp_req_cont_actions = {ILH, {
2431 { "silent-drop", tcp_parse_silent_drop },
2432 { /* END */ }
2433}};
2434
2435static struct action_kw_list tcp_res_cont_actions = {ILH, {
2436 { "silent-drop", tcp_parse_silent_drop },
2437 { /* END */ }
2438}};
2439
2440static struct action_kw_list http_req_actions = {ILH, {
2441 { "silent-drop", tcp_parse_silent_drop },
2442 { /* END */ }
2443}};
2444
2445static struct action_kw_list http_res_actions = {ILH, {
2446 { "silent-drop", tcp_parse_silent_drop },
2447 { /* END */ }
2448}};
2449
2450
Willy Tarreaue6b98942007-10-29 01:09:36 +01002451__attribute__((constructor))
2452static void __tcp_protocol_init(void)
2453{
2454 protocol_register(&proto_tcpv4);
2455 protocol_register(&proto_tcpv6);
Willy Tarreau12785782012-04-27 21:37:17 +02002456 sample_register_fetches(&sample_fetch_keywords);
Willy Tarreaub6866442008-07-14 23:54:42 +02002457 cfg_register_keywords(&cfg_kws);
2458 acl_register_keywords(&acl_kws);
Willy Tarreau44791242012-09-12 23:27:21 +02002459 bind_register_keywords(&bind_kws);
Willy Tarreau163d4622015-10-13 16:16:41 +02002460 srv_register_keywords(&srv_kws);
Willy Tarreau2d392c22015-08-24 01:43:45 +02002461 tcp_req_conn_keywords_register(&tcp_req_conn_actions);
2462 tcp_req_cont_keywords_register(&tcp_req_cont_actions);
2463 tcp_res_cont_keywords_register(&tcp_res_cont_actions);
2464 http_req_keywords_register(&http_req_actions);
2465 http_res_keywords_register(&http_res_actions);
Willy Tarreaue6b98942007-10-29 01:09:36 +01002466}
2467
2468
2469/*
2470 * Local variables:
2471 * c-indent-level: 8
2472 * c-basic-offset: 8
2473 * End:
2474 */