4 * Copyright (c) 2016 Renato Westphal <renato@openbsd.org>
5 * Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
6 * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
7 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
9 * Permission to use, copy, modify, and distribute this software for any
10 * purpose with or without fee is hereby granted, provided that the above
11 * copyright notice and this permission notice appear in all copies.
13 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
32 extern struct zebra_privs_t ldpd_privs
;
33 extern struct zebra_privs_t ldpe_privs
;
36 ldp_create_socket(int af
, enum socket_type type
)
38 int fd
, domain
, proto
;
40 union sockunion local_su
;
48 case LDP_SOCKET_EDISC
:
52 case LDP_SOCKET_SESSION
:
57 fatalx("ldp_create_socket: unknown socket type");
59 fd
= socket(af
, domain
, proto
);
61 log_warn("%s: error creating socket", __func__
);
64 sock_set_nonblock(fd
);
65 sockopt_v6only(af
, fd
);
67 /* bind to a local address/port */
70 /* listen on all addresses */
71 memset(&addr
, 0, sizeof(addr
));
72 addr2sa(af
, &addr
, LDP_PORT
, &local_su
);
74 case LDP_SOCKET_EDISC
:
75 case LDP_SOCKET_SESSION
:
76 addr
= (ldp_af_conf_get(ldpd_conf
, af
))->trans_addr
;
77 addr2sa(af
, &addr
, LDP_PORT
, &local_su
);
78 /* ignore any possible error */
79 sock_set_bindany(fd
, 1);
82 frr_with_privs(&ldpd_privs
) {
83 if (sock_set_reuse(fd
, 1) == -1) {
87 if (bind(fd
, &local_su
.sa
, sockaddr_len(&local_su
.sa
)) == -1) {
88 log_warnx("%s: error binding socket: %s", __func__
,
89 safe_strerror(errno
));
98 if (sock_set_ipv4_tos(fd
, IPTOS_PREC_INTERNETCONTROL
) == -1) {
102 if (type
== LDP_SOCKET_DISC
) {
103 if (sock_set_ipv4_mcast_ttl(fd
,
104 IP_DEFAULT_MULTICAST_TTL
) == -1) {
108 if (sock_set_ipv4_mcast_loop(fd
) == -1) {
113 if (type
== LDP_SOCKET_DISC
|| type
== LDP_SOCKET_EDISC
) {
114 if (sock_set_ipv4_recvif(fd
, 1) == -1) {
119 #if defined(HAVE_IP_PKTINFO)
120 if (sock_set_ipv4_pktinfo(fd
, 1) == -1) {
124 #elif defined(HAVE_IP_RECVDSTADDR)
125 if (sock_set_ipv4_recvdstaddr(fd
, 1) == -1) {
130 #error "Unsupported socket API"
132 #endif /* MSG_MCAST */
134 if (type
== LDP_SOCKET_SESSION
) {
135 if (sock_set_ipv4_ucast_ttl(fd
, 255) == -1) {
142 if (sock_set_ipv6_dscp(fd
, IPTOS_PREC_INTERNETCONTROL
) == -1) {
146 if (type
== LDP_SOCKET_DISC
) {
147 if (sock_set_ipv6_mcast_loop(fd
) == -1) {
151 if (sock_set_ipv6_mcast_hops(fd
, 255) == -1) {
155 if (!(ldpd_conf
->ipv6
.flags
& F_LDPD_AF_NO_GTSM
)) {
156 /* ignore any possible error */
157 sock_set_ipv6_minhopcount(fd
, 255);
160 if (type
== LDP_SOCKET_DISC
|| type
== LDP_SOCKET_EDISC
) {
161 if (sock_set_ipv6_pktinfo(fd
, 1) == -1) {
166 if (type
== LDP_SOCKET_SESSION
) {
167 if (sock_set_ipv6_ucast_hops(fd
, 255) == -1) {
175 case LDP_SOCKET_DISC
:
176 case LDP_SOCKET_EDISC
:
177 sock_set_recvbuf(fd
);
179 case LDP_SOCKET_SESSION
:
180 if (listen(fd
, LDP_BACKLOG
) == -1)
181 log_warn("%s: error listening on socket", __func__
);
185 if (setsockopt(fd
, IPPROTO_TCP
, TCP_MD5SIG
, &opt
,
186 sizeof(opt
)) == -1) {
187 if (errno
== ENOPROTOOPT
) { /* system w/o md5sig */
188 log_warnx("md5sig not available, disabling");
189 sysdep
.no_md5sig
= 1;
203 sock_set_nonblock(int fd
)
207 if ((flags
= fcntl(fd
, F_GETFL
, 0)) == -1)
208 fatal("fcntl F_GETFL");
212 if (fcntl(fd
, F_SETFL
, flags
) == -1)
213 fatal("fcntl F_SETFL");
217 sock_set_cloexec(int fd
)
221 if ((flags
= fcntl(fd
, F_GETFD
, 0)) == -1)
222 fatal("fcntl F_GETFD");
226 if (fcntl(fd
, F_SETFD
, flags
) == -1)
227 fatal("fcntl F_SETFD");
231 sock_set_recvbuf(int fd
)
236 while (setsockopt(fd
, SOL_SOCKET
, SO_RCVBUF
, &bsize
,
237 sizeof(bsize
)) == -1)
242 sock_set_reuse(int fd
, int enable
)
244 if (setsockopt(fd
, SOL_SOCKET
, SO_REUSEADDR
, &enable
,
246 log_warn("%s: error setting SO_REUSEADDR", __func__
);
254 sock_set_bindany(int fd
, int enable
)
256 #ifdef HAVE_SO_BINDANY
257 frr_with_privs(&ldpd_privs
) {
258 if (setsockopt(fd
, SOL_SOCKET
, SO_BINDANY
, &enable
,
260 log_warn("%s: error setting SO_BINDANY", __func__
);
265 #elif defined(HAVE_IP_FREEBIND)
266 if (setsockopt(fd
, IPPROTO_IP
, IP_FREEBIND
, &enable
, sizeof(int)) < 0) {
267 log_warn("%s: error setting IP_FREEBIND", __func__
);
271 #elif defined(IP_BINDANY)
272 frr_with_privs(&ldpd_privs
) {
273 if (setsockopt(fd
, IPPROTO_IP
, IP_BINDANY
, &enable
, sizeof(int))
275 log_warn("%s: error setting IP_BINDANY", __func__
);
282 "%s: missing SO_BINDANY, IP_FREEBIND and IP_BINDANY, unable to bind to a nonlocal IP address",
285 #endif /* HAVE_SO_BINDANY */
290 * Set MD5 key for the socket, for the given peer address. If the password
291 * is NULL or zero-length, the option will be disabled.
294 sock_set_md5sig(int fd
, int af
, union ldpd_addr
*addr
, const char *password
)
297 int save_errno
= ENOSYS
;
298 #if HAVE_DECL_TCP_MD5SIG
304 #if HAVE_DECL_TCP_MD5SIG
305 addr2sa(af
, addr
, 0, &su
);
307 frr_with_privs(&ldpe_privs
) {
308 ret
= sockopt_tcp_signature(fd
, &su
, password
);
311 #endif /* HAVE_TCP_MD5SIG */
313 log_warnx("%s: can't set TCP_MD5SIG option on fd %d: %s",
314 __func__
, fd
, safe_strerror(save_errno
));
321 sock_set_ipv4_tos(int fd
, int tos
)
323 if (setsockopt(fd
, IPPROTO_IP
, IP_TOS
, &tos
, sizeof(tos
)) < 0) {
324 log_warn("%s: error setting IP_TOS to 0x%x", __func__
, tos
);
332 sock_set_ipv4_recvif(int fd
, ifindex_t enable
)
334 return (setsockopt_ifindex(AF_INET
, fd
, enable
));
338 sock_set_ipv4_minttl(int fd
, int ttl
)
340 return (sockopt_minttl(AF_INET
, fd
, ttl
));
344 sock_set_ipv4_ucast_ttl(int fd
, int ttl
)
346 if (setsockopt(fd
, IPPROTO_IP
, IP_TTL
, &ttl
, sizeof(ttl
)) < 0) {
347 log_warn("%s: error setting IP_TTL", __func__
);
355 sock_set_ipv4_mcast_ttl(int fd
, uint8_t ttl
)
357 if (setsockopt(fd
, IPPROTO_IP
, IP_MULTICAST_TTL
,
358 (char *)&ttl
, sizeof(ttl
)) < 0) {
359 log_warn("%s: error setting IP_MULTICAST_TTL to %d",
368 #if defined(HAVE_IP_PKTINFO)
370 sock_set_ipv4_pktinfo(int fd
, int enable
)
372 if (setsockopt(fd
, IPPROTO_IP
, IP_PKTINFO
, &enable
,
373 sizeof(enable
)) < 0) {
374 log_warn("%s: error setting IP_PKTINFO", __func__
);
380 #elif defined(HAVE_IP_RECVDSTADDR)
382 sock_set_ipv4_recvdstaddr(int fd
, int enable
)
384 if (setsockopt(fd
, IPPROTO_IP
, IP_RECVDSTADDR
, &enable
,
385 sizeof(enable
)) < 0) {
386 log_warn("%s: error setting IP_RECVDSTADDR", __func__
);
393 #error "Unsupported socket API"
395 #endif /* MSG_MCAST */
398 sock_set_ipv4_mcast(struct iface
*iface
)
400 struct in_addr if_addr
;
402 if_addr
.s_addr
= if_get_ipv4_addr(iface
);
404 if (setsockopt_ipv4_multicast_if(global
.ipv4
.ldp_disc_socket
,
405 if_addr
, iface
->ifindex
) < 0) {
406 log_warn("%s: error setting IP_MULTICAST_IF, interface %s",
407 __func__
, iface
->name
);
415 sock_set_ipv4_mcast_loop(int fd
)
417 return (setsockopt_ipv4_multicast_loop(fd
, 0));
421 sock_set_ipv6_dscp(int fd
, int dscp
)
423 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_TCLASS
, &dscp
,
425 log_warn("%s: error setting IPV6_TCLASS", __func__
);
433 sock_set_ipv6_pktinfo(int fd
, int enable
)
435 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_RECVPKTINFO
, &enable
,
436 sizeof(enable
)) < 0) {
437 log_warn("%s: error setting IPV6_RECVPKTINFO", __func__
);
445 sock_set_ipv6_minhopcount(int fd
, int hoplimit
)
447 return (sockopt_minttl(AF_INET6
, fd
, hoplimit
));
451 sock_set_ipv6_ucast_hops(int fd
, int hoplimit
)
453 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_UNICAST_HOPS
,
454 &hoplimit
, sizeof(hoplimit
)) < 0) {
455 log_warn("%s: error setting IPV6_UNICAST_HOPS", __func__
);
463 sock_set_ipv6_mcast_hops(int fd
, int hoplimit
)
465 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_MULTICAST_HOPS
,
466 &hoplimit
, sizeof(hoplimit
)) < 0) {
467 log_warn("%s: error setting IPV6_MULTICAST_HOPS", __func__
);
475 sock_set_ipv6_mcast(struct iface
*iface
)
477 if (setsockopt(global
.ipv6
.ldp_disc_socket
, IPPROTO_IPV6
,
478 IPV6_MULTICAST_IF
, &iface
->ifindex
, sizeof(iface
->ifindex
)) < 0) {
479 log_warn("%s: error setting IPV6_MULTICAST_IF, interface %s",
480 __func__
, iface
->name
);
488 sock_set_ipv6_mcast_loop(int fd
)
490 unsigned int loop
= 0;
492 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_MULTICAST_LOOP
,
493 &loop
, sizeof(loop
)) < 0) {
494 log_warn("%s: error setting IPV6_MULTICAST_LOOP", __func__
);