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 struct sockaddr_storage local_sa
;
49 case LDP_SOCKET_EDISC
:
53 case LDP_SOCKET_SESSION
:
58 fatalx("ldp_create_socket: unknown socket type");
60 fd
= socket(af
, domain
, proto
);
62 log_warn("%s: error creating socket", __func__
);
65 sock_set_nonblock(fd
);
66 sockopt_v6only(af
, fd
);
68 /* bind to a local address/port */
71 /* listen on all addresses */
72 memset(&addr
, 0, sizeof(addr
));
73 memcpy(&local_sa
, addr2sa(af
, &addr
, LDP_PORT
),
76 case LDP_SOCKET_EDISC
:
77 case LDP_SOCKET_SESSION
:
78 addr
= (ldp_af_conf_get(ldpd_conf
, af
))->trans_addr
;
79 memcpy(&local_sa
, addr2sa(af
, &addr
, LDP_PORT
),
81 /* ignore any possible error */
82 sock_set_bindany(fd
, 1);
85 if (ldpd_privs
.change(ZPRIVS_RAISE
))
86 log_warn("%s: could not raise privs", __func__
);
87 if (sock_set_reuse(fd
, 1) == -1) {
91 if (bind(fd
, (struct sockaddr
*)&local_sa
,
92 sockaddr_len((struct sockaddr
*)&local_sa
)) == -1) {
94 if (ldpd_privs
.change(ZPRIVS_LOWER
))
95 log_warn("%s: could not lower privs", __func__
);
96 log_warnx("%s: error binding socket: %s", __func__
,
97 safe_strerror(save_errno
));
101 if (ldpd_privs
.change(ZPRIVS_LOWER
))
102 log_warn("%s: could not lower privs", __func__
);
107 if (sock_set_ipv4_tos(fd
, IPTOS_PREC_INTERNETCONTROL
) == -1) {
111 if (type
== LDP_SOCKET_DISC
) {
112 if (sock_set_ipv4_mcast_ttl(fd
,
113 IP_DEFAULT_MULTICAST_TTL
) == -1) {
117 if (sock_set_ipv4_mcast_loop(fd
) == -1) {
122 if (type
== LDP_SOCKET_DISC
|| type
== LDP_SOCKET_EDISC
) {
123 if (sock_set_ipv4_recvif(fd
, 1) == -1) {
128 #if defined(HAVE_IP_PKTINFO)
129 if (sock_set_ipv4_pktinfo(fd
, 1) == -1) {
133 #elif defined(HAVE_IP_RECVDSTADDR)
134 if (sock_set_ipv4_recvdstaddr(fd
, 1) == -1) {
139 #error "Unsupported socket API"
141 #endif /* MSG_MCAST */
143 if (type
== LDP_SOCKET_SESSION
) {
144 if (sock_set_ipv4_ucast_ttl(fd
, 255) == -1) {
151 if (sock_set_ipv6_dscp(fd
, IPTOS_PREC_INTERNETCONTROL
) == -1) {
155 if (type
== LDP_SOCKET_DISC
) {
156 if (sock_set_ipv6_mcast_loop(fd
) == -1) {
160 if (sock_set_ipv6_mcast_hops(fd
, 255) == -1) {
164 if (!(ldpd_conf
->ipv6
.flags
& F_LDPD_AF_NO_GTSM
)) {
165 /* ignore any possible error */
166 sock_set_ipv6_minhopcount(fd
, 255);
169 if (type
== LDP_SOCKET_DISC
|| type
== LDP_SOCKET_EDISC
) {
170 if (sock_set_ipv6_pktinfo(fd
, 1) == -1) {
175 if (type
== LDP_SOCKET_SESSION
) {
176 if (sock_set_ipv6_ucast_hops(fd
, 255) == -1) {
184 case LDP_SOCKET_DISC
:
185 case LDP_SOCKET_EDISC
:
186 sock_set_recvbuf(fd
);
188 case LDP_SOCKET_SESSION
:
189 if (listen(fd
, LDP_BACKLOG
) == -1)
190 log_warn("%s: error listening on socket", __func__
);
194 if (setsockopt(fd
, IPPROTO_TCP
, TCP_MD5SIG
, &opt
,
195 sizeof(opt
)) == -1) {
196 if (errno
== ENOPROTOOPT
) { /* system w/o md5sig */
197 log_warnx("md5sig not available, disabling");
198 sysdep
.no_md5sig
= 1;
212 sock_set_nonblock(int fd
)
216 if ((flags
= fcntl(fd
, F_GETFL
, 0)) == -1)
217 fatal("fcntl F_GETFL");
221 if ((flags
= fcntl(fd
, F_SETFL
, flags
)) == -1)
222 fatal("fcntl F_SETFL");
226 sock_set_cloexec(int fd
)
230 if ((flags
= fcntl(fd
, F_GETFD
, 0)) == -1)
231 fatal("fcntl F_GETFD");
235 if ((flags
= fcntl(fd
, F_SETFD
, flags
)) == -1)
236 fatal("fcntl F_SETFD");
240 sock_set_recvbuf(int fd
)
245 while (setsockopt(fd
, SOL_SOCKET
, SO_RCVBUF
, &bsize
,
246 sizeof(bsize
)) == -1)
251 sock_set_reuse(int fd
, int enable
)
253 if (setsockopt(fd
, SOL_SOCKET
, SO_REUSEADDR
, &enable
,
255 log_warn("%s: error setting SO_REUSEADDR", __func__
);
263 sock_set_bindany(int fd
, int enable
)
265 #ifdef HAVE_SO_BINDANY
266 if (ldpd_privs
.change(ZPRIVS_RAISE
))
267 log_warn("%s: could not raise privs", __func__
);
268 if (setsockopt(fd
, SOL_SOCKET
, SO_BINDANY
, &enable
,
270 if (ldpd_privs
.change(ZPRIVS_LOWER
))
271 log_warn("%s: could not lower privs", __func__
);
272 log_warn("%s: error setting SO_BINDANY", __func__
);
275 if (ldpd_privs
.change(ZPRIVS_LOWER
))
276 log_warn("%s: could not lower privs", __func__
);
278 #elif defined(HAVE_IP_FREEBIND)
279 if (setsockopt(fd
, IPPROTO_IP
, IP_FREEBIND
, &enable
, sizeof(int)) < 0) {
280 log_warn("%s: error setting IP_FREEBIND", __func__
);
285 log_warnx("%s: missing SO_BINDANY and IP_FREEBIND, unable to bind "
286 "to a nonlocal IP address", __func__
);
288 #endif /* HAVE_SO_BINDANY */
293 * Set MD5 key for the socket, for the given peer address. If the password
294 * is NULL or zero-length, the option will be disabled.
297 sock_set_md5sig(int fd
, int af
, union ldpd_addr
*addr
, const char *password
)
300 int save_errno
= ENOSYS
;
301 #if HAVE_DECL_TCP_MD5SIG
307 #if HAVE_DECL_TCP_MD5SIG
308 memcpy(&su
, addr2sa(af
, addr
, 0), sizeof(su
));
310 if (ldpe_privs
.change(ZPRIVS_RAISE
)) {
311 log_warn("%s: could not raise privs", __func__
);
314 ret
= sockopt_tcp_signature(fd
, &su
, password
);
316 if (ldpe_privs
.change(ZPRIVS_LOWER
))
317 log_warn("%s: could not lower privs", __func__
);
318 #endif /* HAVE_TCP_MD5SIG */
320 log_warnx("%s: can't set TCP_MD5SIG option on fd %d: %s",
321 __func__
, fd
, safe_strerror(save_errno
));
328 sock_set_ipv4_tos(int fd
, int tos
)
330 if (setsockopt(fd
, IPPROTO_IP
, IP_TOS
, (int *)&tos
, sizeof(tos
)) < 0) {
331 log_warn("%s: error setting IP_TOS to 0x%x", __func__
, tos
);
339 sock_set_ipv4_recvif(int fd
, int enable
)
341 return (setsockopt_ifindex(AF_INET
, fd
, enable
));
345 sock_set_ipv4_minttl(int fd
, int ttl
)
347 return (sockopt_minttl(AF_INET
, fd
, ttl
));
351 sock_set_ipv4_ucast_ttl(int fd
, int ttl
)
353 if (setsockopt(fd
, IPPROTO_IP
, IP_TTL
, &ttl
, sizeof(ttl
)) < 0) {
354 log_warn("%s: error setting IP_TTL", __func__
);
362 sock_set_ipv4_mcast_ttl(int fd
, uint8_t ttl
)
364 if (setsockopt(fd
, IPPROTO_IP
, IP_MULTICAST_TTL
,
365 (char *)&ttl
, sizeof(ttl
)) < 0) {
366 log_warn("%s: error setting IP_MULTICAST_TTL to %d",
375 #if defined(HAVE_IP_PKTINFO)
377 sock_set_ipv4_pktinfo(int fd
, int enable
)
379 if (setsockopt(fd
, IPPROTO_IP
, IP_PKTINFO
, &enable
,
380 sizeof(enable
)) < 0) {
381 log_warn("%s: error setting IP_PKTINFO", __func__
);
387 #elif defined(HAVE_IP_RECVDSTADDR)
389 sock_set_ipv4_recvdstaddr(int fd
, int enable
)
391 if (setsockopt(fd
, IPPROTO_IP
, IP_RECVDSTADDR
, &enable
,
392 sizeof(enable
)) < 0) {
393 log_warn("%s: error setting IP_RECVDSTADDR", __func__
);
400 #error "Unsupported socket API"
402 #endif /* MSG_MCAST */
405 sock_set_ipv4_mcast(struct iface
*iface
)
407 struct in_addr if_addr
;
409 if_addr
.s_addr
= if_get_ipv4_addr(iface
);
411 if (setsockopt_ipv4_multicast_if(global
.ipv4
.ldp_disc_socket
,
412 if_addr
, iface
->ifindex
) < 0) {
413 log_warn("%s: error setting IP_MULTICAST_IF, interface %s",
414 __func__
, iface
->name
);
422 sock_set_ipv4_mcast_loop(int fd
)
424 return (setsockopt_ipv4_multicast_loop(fd
, 0));
428 sock_set_ipv6_dscp(int fd
, int dscp
)
430 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_TCLASS
, &dscp
,
432 log_warn("%s: error setting IPV6_TCLASS", __func__
);
440 sock_set_ipv6_pktinfo(int fd
, int enable
)
442 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_RECVPKTINFO
, &enable
,
443 sizeof(enable
)) < 0) {
444 log_warn("%s: error setting IPV6_RECVPKTINFO", __func__
);
452 sock_set_ipv6_minhopcount(int fd
, int hoplimit
)
454 return (sockopt_minttl(AF_INET6
, fd
, hoplimit
));
458 sock_set_ipv6_ucast_hops(int fd
, int hoplimit
)
460 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_UNICAST_HOPS
,
461 &hoplimit
, sizeof(hoplimit
)) < 0) {
462 log_warn("%s: error setting IPV6_UNICAST_HOPS", __func__
);
470 sock_set_ipv6_mcast_hops(int fd
, int hoplimit
)
472 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_MULTICAST_HOPS
,
473 &hoplimit
, sizeof(hoplimit
)) < 0) {
474 log_warn("%s: error setting IPV6_MULTICAST_HOPS", __func__
);
482 sock_set_ipv6_mcast(struct iface
*iface
)
484 if (setsockopt(global
.ipv6
.ldp_disc_socket
, IPPROTO_IPV6
,
485 IPV6_MULTICAST_IF
, &iface
->ifindex
, sizeof(iface
->ifindex
)) < 0) {
486 log_warn("%s: error setting IPV6_MULTICAST_IF, interface %s",
487 __func__
, iface
->name
);
495 sock_set_ipv6_mcast_loop(int fd
)
497 unsigned int loop
= 0;
499 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_MULTICAST_LOOP
,
500 &loop
, sizeof(loop
)) < 0) {
501 log_warn("%s: error setting IPV6_MULTICAST_LOOP", __func__
);