1 files changed, 83 insertions, 0 deletions
diff --git a/sysdep/bsd/sysio.h b/sysdep/bsd/sysio.h
new file mode 100644
index 0000000..db69b97
--- /dev/null
+++ b/sysdep/bsd/sysio.h
@@ -0,0 +1,83 @@
+/*
+ *	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