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
;
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 addr2sa(af
, &addr
, LDP_PORT
, &local_su
);
75 case LDP_SOCKET_EDISC
:
76 case LDP_SOCKET_SESSION
:
77 addr
= (ldp_af_conf_get(ldpd_conf
, af
))->trans_addr
;
78 addr2sa(af
, &addr
, LDP_PORT
, &local_su
);
79 /* ignore any possible error */
80 sock_set_bindany(fd
, 1);
83 if (ldpd_privs
.change(ZPRIVS_RAISE
))
84 log_warn("%s: could not raise privs", __func__
);
85 if (sock_set_reuse(fd
, 1) == -1) {
86 if (ldpd_privs
.change(ZPRIVS_LOWER
))
87 log_warn("%s: could not lower privs", __func__
);
91 if (bind(fd
, &local_su
.sa
, sockaddr_len(&local_su
.sa
)) == -1) {
93 if (ldpd_privs
.change(ZPRIVS_LOWER
))
94 log_warn("%s: could not lower privs", __func__
);
95 log_warnx("%s: error binding socket: %s", __func__
,
96 safe_strerror(save_errno
));
100 if (ldpd_privs
.change(ZPRIVS_LOWER
))
101 log_warn("%s: could not lower privs", __func__
);
106 if (sock_set_ipv4_tos(fd
, IPTOS_PREC_INTERNETCONTROL
) == -1) {
110 if (type
== LDP_SOCKET_DISC
) {
111 if (sock_set_ipv4_mcast_ttl(fd
,
112 IP_DEFAULT_MULTICAST_TTL
) == -1) {
116 if (sock_set_ipv4_mcast_loop(fd
) == -1) {
121 if (type
== LDP_SOCKET_DISC
|| type
== LDP_SOCKET_EDISC
) {
122 if (sock_set_ipv4_recvif(fd
, 1) == -1) {
127 #if defined(HAVE_IP_PKTINFO)
128 if (sock_set_ipv4_pktinfo(fd
, 1) == -1) {
132 #elif defined(HAVE_IP_RECVDSTADDR)
133 if (sock_set_ipv4_recvdstaddr(fd
, 1) == -1) {
138 #error "Unsupported socket API"
140 #endif /* MSG_MCAST */
142 if (type
== LDP_SOCKET_SESSION
) {
143 if (sock_set_ipv4_ucast_ttl(fd
, 255) == -1) {
150 if (sock_set_ipv6_dscp(fd
, IPTOS_PREC_INTERNETCONTROL
) == -1) {
154 if (type
== LDP_SOCKET_DISC
) {
155 if (sock_set_ipv6_mcast_loop(fd
) == -1) {
159 if (sock_set_ipv6_mcast_hops(fd
, 255) == -1) {
163 if (!(ldpd_conf
->ipv6
.flags
& F_LDPD_AF_NO_GTSM
)) {
164 /* ignore any possible error */
165 sock_set_ipv6_minhopcount(fd
, 255);
168 if (type
== LDP_SOCKET_DISC
|| type
== LDP_SOCKET_EDISC
) {
169 if (sock_set_ipv6_pktinfo(fd
, 1) == -1) {
174 if (type
== LDP_SOCKET_SESSION
) {
175 if (sock_set_ipv6_ucast_hops(fd
, 255) == -1) {
183 case LDP_SOCKET_DISC
:
184 case LDP_SOCKET_EDISC
:
185 sock_set_recvbuf(fd
);
187 case LDP_SOCKET_SESSION
:
188 if (listen(fd
, LDP_BACKLOG
) == -1)
189 log_warn("%s: error listening on socket", __func__
);
193 if (setsockopt(fd
, IPPROTO_TCP
, TCP_MD5SIG
, &opt
,
194 sizeof(opt
)) == -1) {
195 if (errno
== ENOPROTOOPT
) { /* system w/o md5sig */
196 log_warnx("md5sig not available, disabling");
197 sysdep
.no_md5sig
= 1;
211 sock_set_nonblock(int fd
)
215 if ((flags
= fcntl(fd
, F_GETFL
, 0)) == -1)
216 fatal("fcntl F_GETFL");
220 if ((flags
= fcntl(fd
, F_SETFL
, flags
)) == -1)
221 fatal("fcntl F_SETFL");
225 sock_set_cloexec(int fd
)
229 if ((flags
= fcntl(fd
, F_GETFD
, 0)) == -1)
230 fatal("fcntl F_GETFD");
234 if ((flags
= fcntl(fd
, F_SETFD
, flags
)) == -1)
235 fatal("fcntl F_SETFD");
239 sock_set_recvbuf(int fd
)
244 while (setsockopt(fd
, SOL_SOCKET
, SO_RCVBUF
, &bsize
,
245 sizeof(bsize
)) == -1)
250 sock_set_reuse(int fd
, int enable
)
252 if (setsockopt(fd
, SOL_SOCKET
, SO_REUSEADDR
, &enable
,
254 log_warn("%s: error setting SO_REUSEADDR", __func__
);
262 sock_set_bindany(int fd
, int enable
)
264 #ifdef HAVE_SO_BINDANY
265 if (ldpd_privs
.change(ZPRIVS_RAISE
))
266 log_warn("%s: could not raise privs", __func__
);
267 if (setsockopt(fd
, SOL_SOCKET
, SO_BINDANY
, &enable
,
269 if (ldpd_privs
.change(ZPRIVS_LOWER
))
270 log_warn("%s: could not lower privs", __func__
);
271 log_warn("%s: error setting SO_BINDANY", __func__
);
274 if (ldpd_privs
.change(ZPRIVS_LOWER
))
275 log_warn("%s: could not lower privs", __func__
);
277 #elif defined(HAVE_IP_FREEBIND)
278 if (setsockopt(fd
, IPPROTO_IP
, IP_FREEBIND
, &enable
, sizeof(int)) < 0) {
279 log_warn("%s: error setting IP_FREEBIND", __func__
);
284 log_warnx("%s: missing SO_BINDANY and IP_FREEBIND, unable to bind "
285 "to a nonlocal IP address", __func__
);
287 #endif /* HAVE_SO_BINDANY */
292 * Set MD5 key for the socket, for the given peer address. If the password
293 * is NULL or zero-length, the option will be disabled.
296 sock_set_md5sig(int fd
, int af
, union ldpd_addr
*addr
, const char *password
)
299 int save_errno
= ENOSYS
;
300 #if HAVE_DECL_TCP_MD5SIG
306 #if HAVE_DECL_TCP_MD5SIG
307 addr2sa(af
, addr
, 0, &su
);
309 if (ldpe_privs
.change(ZPRIVS_RAISE
)) {
310 log_warn("%s: could not raise privs", __func__
);
313 ret
= sockopt_tcp_signature(fd
, &su
, password
);
315 if (ldpe_privs
.change(ZPRIVS_LOWER
))
316 log_warn("%s: could not lower privs", __func__
);
317 #endif /* HAVE_TCP_MD5SIG */
319 log_warnx("%s: can't set TCP_MD5SIG option on fd %d: %s",
320 __func__
, fd
, safe_strerror(save_errno
));
327 sock_set_ipv4_tos(int fd
, int tos
)
329 if (setsockopt(fd
, IPPROTO_IP
, IP_TOS
, (int *)&tos
, sizeof(tos
)) < 0) {
330 log_warn("%s: error setting IP_TOS to 0x%x", __func__
, tos
);
338 sock_set_ipv4_recvif(int fd
, int enable
)
340 return (setsockopt_ifindex(AF_INET
, fd
, enable
));
344 sock_set_ipv4_minttl(int fd
, int ttl
)
346 return (sockopt_minttl(AF_INET
, fd
, ttl
));
350 sock_set_ipv4_ucast_ttl(int fd
, int ttl
)
352 if (setsockopt(fd
, IPPROTO_IP
, IP_TTL
, &ttl
, sizeof(ttl
)) < 0) {
353 log_warn("%s: error setting IP_TTL", __func__
);
361 sock_set_ipv4_mcast_ttl(int fd
, uint8_t ttl
)
363 if (setsockopt(fd
, IPPROTO_IP
, IP_MULTICAST_TTL
,
364 (char *)&ttl
, sizeof(ttl
)) < 0) {
365 log_warn("%s: error setting IP_MULTICAST_TTL to %d",
374 #if defined(HAVE_IP_PKTINFO)
376 sock_set_ipv4_pktinfo(int fd
, int enable
)
378 if (setsockopt(fd
, IPPROTO_IP
, IP_PKTINFO
, &enable
,
379 sizeof(enable
)) < 0) {
380 log_warn("%s: error setting IP_PKTINFO", __func__
);
386 #elif defined(HAVE_IP_RECVDSTADDR)
388 sock_set_ipv4_recvdstaddr(int fd
, int enable
)
390 if (setsockopt(fd
, IPPROTO_IP
, IP_RECVDSTADDR
, &enable
,
391 sizeof(enable
)) < 0) {
392 log_warn("%s: error setting IP_RECVDSTADDR", __func__
);
399 #error "Unsupported socket API"
401 #endif /* MSG_MCAST */
404 sock_set_ipv4_mcast(struct iface
*iface
)
406 struct in_addr if_addr
;
408 if_addr
.s_addr
= if_get_ipv4_addr(iface
);
410 if (setsockopt_ipv4_multicast_if(global
.ipv4
.ldp_disc_socket
,
411 if_addr
, iface
->ifindex
) < 0) {
412 log_warn("%s: error setting IP_MULTICAST_IF, interface %s",
413 __func__
, iface
->name
);
421 sock_set_ipv4_mcast_loop(int fd
)
423 return (setsockopt_ipv4_multicast_loop(fd
, 0));
427 sock_set_ipv6_dscp(int fd
, int dscp
)
429 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_TCLASS
, &dscp
,
431 log_warn("%s: error setting IPV6_TCLASS", __func__
);
439 sock_set_ipv6_pktinfo(int fd
, int enable
)
441 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_RECVPKTINFO
, &enable
,
442 sizeof(enable
)) < 0) {
443 log_warn("%s: error setting IPV6_RECVPKTINFO", __func__
);
451 sock_set_ipv6_minhopcount(int fd
, int hoplimit
)
453 return (sockopt_minttl(AF_INET6
, fd
, hoplimit
));
457 sock_set_ipv6_ucast_hops(int fd
, int hoplimit
)
459 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_UNICAST_HOPS
,
460 &hoplimit
, sizeof(hoplimit
)) < 0) {
461 log_warn("%s: error setting IPV6_UNICAST_HOPS", __func__
);
469 sock_set_ipv6_mcast_hops(int fd
, int hoplimit
)
471 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_MULTICAST_HOPS
,
472 &hoplimit
, sizeof(hoplimit
)) < 0) {
473 log_warn("%s: error setting IPV6_MULTICAST_HOPS", __func__
);
481 sock_set_ipv6_mcast(struct iface
*iface
)
483 if (setsockopt(global
.ipv6
.ldp_disc_socket
, IPPROTO_IPV6
,
484 IPV6_MULTICAST_IF
, &iface
->ifindex
, sizeof(iface
->ifindex
)) < 0) {
485 log_warn("%s: error setting IPV6_MULTICAST_IF, interface %s",
486 __func__
, iface
->name
);
494 sock_set_ipv6_mcast_loop(int fd
)
496 unsigned int loop
= 0;
498 if (setsockopt(fd
, IPPROTO_IPV6
, IPV6_MULTICAST_LOOP
,
499 &loop
, sizeof(loop
)) < 0) {
500 log_warn("%s: error setting IPV6_MULTICAST_LOOP", __func__
);