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Multicast problems should be gone, although the fix is Linux only and we'll

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need to figure out something better when working on new ports.
This commit is contained in:
Martin Mares 2000-05-11 16:30:56 +00:00
parent 28323d9ddb
commit 0e5aa966cc
1 changed files with 8 additions and 4 deletions
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12
sysdep/linux/sysio.h
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@ -23,6 +23,8 @@ set_inaddr(struct in6_addr *ia, ip_addr a)
#else #else
#include <net/if.h>
static inline void static inline void
set_inaddr(struct in_addr *ia, ip_addr a) set_inaddr(struct in_addr *ia, ip_addr a)
{ {
@ -78,14 +80,18 @@ static inline char *sysio_mcast_join(sock *s)
{ {
struct ip_mreqn mreq; struct ip_mreqn mreq;
char *err; char *err;
struct ifreq ifr;
if (err = sysio_mcast_setup(s)) if (err = sysio_mcast_setup(s))
return err; return err;
strcpy(ifr.ifr_name, s->iface->name);
if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0)
return "SO_BINDTODEVICE";
mreq.imr_ifindex = s->iface->index; mreq.imr_ifindex = s->iface->index;
set_inaddr(&mreq.imr_address, s->iface->addr->ip); set_inaddr(&mreq.imr_address, s->iface->addr->ip);
set_inaddr(&mreq.imr_multiaddr, s->daddr); set_inaddr(&mreq.imr_multiaddr, s->daddr);
/* This defines where should we send _outgoing_ multicasts */ /* This defines where should we send _outgoing_ multicasts */
if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq)) < 0) if (ipa_nonzero(s->daddr) && setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq)) < 0)
return "IP_MULTICAST_IF"; return "IP_MULTICAST_IF";
/* And this one sets interface for _receiving_ multicasts from */ /* And this one sets interface for _receiving_ multicasts from */
if (ipa_nonzero(s->saddr) && setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) if (ipa_nonzero(s->saddr) && setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
@ -101,8 +107,6 @@ static inline char *sysio_mcast_join(sock *s)
* we can use SO_BINDTODEVICE to circumvent this problem. * we can use SO_BINDTODEVICE to circumvent this problem.
*/ */
#include <net/if.h>
static inline char *sysio_mcast_join(sock *s) static inline char *sysio_mcast_join(sock *s)
{ {
struct in_addr mreq; struct in_addr mreq;
@ -125,7 +129,7 @@ static inline char *sysio_mcast_join(sock *s)
#endif #endif
set_inaddr(&mreq_add.imr_multiaddr, s->daddr); set_inaddr(&mreq_add.imr_multiaddr, s->daddr);
/* This defines where should we send _outgoing_ multicasts */ /* This defines where should we send _outgoing_ multicasts */
if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq)) < 0) if (ipa_nonzero(s->daddr) && setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq)) < 0)
return "IP_MULTICAST_IF"; return "IP_MULTICAST_IF";
/* And this one sets interface for _receiving_ multicasts from */ /* And this one sets interface for _receiving_ multicasts from */
if (ipa_nonzero(s->saddr) && setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq_add, sizeof(mreq_add)) < 0) if (ipa_nonzero(s->saddr) && setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq_add, sizeof(mreq_add)) < 0)