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Fixed a couple of bugs in handling of multicast sockets.

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See comments in lib/socket.h for a detailed guide on how to use them.
This commit is contained in:
Martin Mares
1999-04-12 14:57:46 +00:00
parent bad631e048
commit 5a99ade413
3 changed files with 19 additions and 11 deletions
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17
sysdep/unix/io.c
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@@ -408,21 +408,18 @@ sk_open(sock *s)
case SK_IP_MC:
{
#ifdef HAVE_IP_MREQN
/* FIXME: Define HAVE_IP_MREQN somewhere :) */
struct ip_mreqn mreq;
#define mreq_add mreq
ASSERT(s->iface);
mreq.imr_ifindex = s->iface->index;
if (has_src)
set_inaddr(&mreq.imr_address, s->saddr);
else
set_inaddr(&mreq.imr_address, s->iface->ifa->ip);
set_inaddr(&mreq.imr_address, s->iface->ip);
#else
struct in_addr mreq;
struct ip_mreq mreq_add;
if (has_src)
set_inaddr(&mreq, s->saddr);
else
set_inaddr(&mreq, s->iface->ip);
memcpy(&mreq_add.imr_interface, &mreq, sizeof(struct in_addr));
ASSERT(s->iface);
set_inaddr(&mreq, s->iface->ip);
mreq_add.imr_interface = mreq;
#endif
set_inaddr(&mreq_add.imr_multiaddr, s->daddr);
if (has_dest)
@@ -439,9 +436,11 @@ sk_open(sock *s)
#endif
setsockopt(fd, SOL_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0)
ERR("IP_MULTICAST_LOOP");
/* This defines where should we send _outgoing_ multicasts */
if (setsockopt(fd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq)) < 0)
ERR("IP_MULTICAST_IF");
}
/* And this one sets interface for _receiving_ multicasts from */
if (has_src && setsockopt(fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq_add, sizeof(mreq_add)) < 0)
ERR("IP_ADD_MEMBERSHIP");
break;