From: Guus Sliepen <guus@tinc-vpn.org>
Date: Sun, 25 Mar 2012 12:40:55 +0000 (+0100)
Subject: Add #ifdefs in case not all platforms support IPv4 and IPv6 multicast.
X-Git-Tag: import-tinc-1.1~385^2~9
X-Git-Url: https://git.meshlink.io/?a=commitdiff_plain;h=251204063255d95910f9a079015e2f9b428fd983;p=meshlink

Add #ifdefs in case not all platforms support IPv4 and IPv6 multicast.
---

diff --git a/src/multicast_device.c b/src/multicast_device.c
index 392fd371..495f8fc9 100644
--- a/src/multicast_device.c
+++ b/src/multicast_device.c
@@ -92,6 +92,7 @@ static bool setup_device(void) {
 	}
 
 	switch(ai->ai_family) {
+#ifdef IP_ADD_MEMBERSHIP
 		case AF_INET: {
 			struct ip_mreq mreq;
 			struct sockaddr_in in;
@@ -103,10 +104,16 @@ static bool setup_device(void) {
 				closesocket(device_fd);
 				return false;
 			}
+#ifdef IP_MULTICAST_LOOP
 			setsockopt(device_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &one, sizeof one);
+#endif
+#ifdef IP_MULTICAST_TTL
 			setsockopt(device_fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof ttl);
+#endif
 		} break;
+#endif
 
+#ifdef IPV6_JOIN_GROUP
 		case AF_INET6: {
 			struct ipv6_mreq mreq;
 			struct sockaddr_in6 in6;
@@ -118,9 +125,14 @@ static bool setup_device(void) {
 				closesocket(device_fd);
 				return false;
 			}
+#ifdef IPV6_MULTICAST_LOOP
 			setsockopt(device_fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &one, sizeof one);
+#endif
+#ifdef IPV6_MULTICAST_HOPS
 			setsockopt(device_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof ttl);
+#endif
 		} break;
+#endif
 	
 		default:
 			logger(LOG_ERR, "Multicast for address family %hx unsupported", ai->ai_family);