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-rw-r--r--sysdep/unix/io.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/sysdep/unix/io.c b/sysdep/unix/io.c
index d98972c7..02de2fa7 100644
--- a/sysdep/unix/io.c
+++ b/sysdep/unix/io.c
@@ -413,6 +413,16 @@ sk_open(sock *s)
ASSERT(s->iface);
mreq.imr_ifindex = s->iface->index;
set_inaddr(&mreq.imr_address, s->iface->ip);
+#ifdef SO_BINDTODEVICE
+ {
+ struct ifreq ifr;
+ strcpy(ifr.ifr_name, s->iface->name);
+ if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0)
+ ERR("SO_BINDTODEVICE");
+ }
+#else
+#error Multicasts not supported on PtP devices /* FIXME: Solve it somehow? */
+#endif
#else
struct in_addr mreq;
struct ip_mreq mreq_add;