mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-11-14 15:18:44 +00:00
84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
/*
|
|
* BIRD Internet Routing Daemon -- NetBSD Multicasting and Network Includes
|
|
*
|
|
* (c) 2004 Ondrej Filip <feela@network.cz>
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
#ifdef IPV6
|
|
|
|
static inline void
|
|
set_inaddr(struct in6_addr * ia, ip_addr a)
|
|
{
|
|
ipa_hton(a);
|
|
memcpy(ia, &a, sizeof(a));
|
|
}
|
|
|
|
#else
|
|
|
|
#include <net/if.h>
|
|
|
|
static inline void
|
|
set_inaddr(struct in_addr * ia, ip_addr a)
|
|
{
|
|
ipa_hton(a);
|
|
memcpy(&ia->s_addr, &a, sizeof(a));
|
|
}
|
|
|
|
static inline char *
|
|
sysio_mcast_setup(sock * s)
|
|
{
|
|
u8 zero = 0;
|
|
u8 one = 1;
|
|
|
|
if (ipa_nonzero(s->daddr)) {
|
|
|
|
if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0) {
|
|
log("IP_MULTICAST_LOOP");
|
|
return "IP_MULTICAST_LOOP";
|
|
}
|
|
|
|
if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_TTL, &one, sizeof(one)) < 0) {
|
|
log("IP_MULTICAST_TTL");
|
|
return "IP_MULTICAST_TTL";
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static inline char *
|
|
sysio_mcast_join(sock * s)
|
|
{
|
|
struct in_addr m;
|
|
struct ip_mreq mreq;
|
|
char *err;
|
|
|
|
set_inaddr(&m, s->iface->addr->ip );
|
|
|
|
memset(&mreq, 0, sizeof(mreq));
|
|
set_inaddr(&mreq.imr_interface, s->iface->addr->ip);
|
|
set_inaddr(&mreq.imr_multiaddr, s->daddr);
|
|
|
|
/* And this one sets interface for _receiving_ multicasts from */
|
|
if (ipa_nonzero(s->daddr) && setsockopt(s->fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
|
|
log("IP_ADD_MEMBERSHIP");
|
|
return "IP_ADD_MEMBERSHIP";
|
|
}
|
|
|
|
|
|
/* This defines where should we send _outgoing_ multicasts */
|
|
if (ipa_nonzero(s->daddr) && setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_IF, &m, sizeof(m)) < 0) {
|
|
log("IP_MULTICAST_IF");
|
|
return "IP_MULTICAST_IF";
|
|
}
|
|
|
|
if (err = sysio_mcast_setup(s))
|
|
return err;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#endif
|