Merge pull request #241 from fichtner/freebsd

implement setup_allrouters_membership() et al for FreeBSD #145

device-bsd44.c

@@ -127,28 +127,31 @@ int update_device_info(int sock, struct Interface *iface)
 
 int setup_allrouters_membership(int sock, struct Interface *iface)
 {
-	return 0;
+	struct ipv6_mreq mreq;
 
-	/* Quoting:
-	https://github.com/radvd-project/radvd/issues/145#issuecomment-810466476
+	memset(&mreq, 0, sizeof(mreq));
+	mreq.ipv6mr_interface = iface->props.if_index;
 
-	OK, it will be up to FreeBSD guys to show up
-	if they want to upstream their patches.
+	/* all-routers multicast address */
+	if (inet_pton(AF_INET6, "ff02::2",
+		    &mreq.ipv6mr_multiaddr.s6_addr) != 1) {
+		flog(LOG_ERR, "inet_pton failed");
+		return -1;
+	}
 
-	*/
+	if (setsockopt(sock, IPPROTO_IPV6, IPV6_JOIN_GROUP,
+		    &mreq, sizeof(mreq)) < 0 && errno != EADDRINUSE) {
+		flog(LOG_ERR, "can't join ipv6-allrouters on %s", iface->props.name);
+		return -1;
+	}
+
+	return 0;
 }
 
 int cleanup_allrouters_membership(int sock, struct Interface *iface)
 {
+	/* no cleanup necessary */
 	return 0;
-
-	/* Quoting:
-	https://github.com/radvd-project/radvd/issues/145#issuecomment-810466476
-
-	OK, it will be up to FreeBSD guys to show up
-	if they want to upstream their patches.
-
-	*/
 }
 
 int set_interface_linkmtu(const char *iface, uint32_t mtu)
@@ -184,5 +187,5 @@ int check_ip6_forwarding(void)
 int check_ip6_iface_forwarding(const char *iface)
 {
 	dlog(LOG_DEBUG, 4, "checking ipv6 forwarding of interface not supported");
-	return -1;
+	return 1;
 }