rupa said this segged

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13550 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_utils.c

@@ -747,7 +747,7 @@ static int get_netmask(struct sockaddr_in *me, int *mask)
 {
 	struct ifaddrs *ifaddrs, *i = NULL;
 
-	if (getifaddrs(&ifaddrs) < 0) {
+	if (!me || getifaddrs(&ifaddrs) < 0) {
 		return -1;
 	}	
 
@@ -755,7 +755,7 @@ static int get_netmask(struct sockaddr_in *me, int *mask)
 		struct sockaddr_in *s = (struct sockaddr_in *)i->ifa_addr;
 		struct sockaddr_in *m = (struct sockaddr_in *)i->ifa_netmask;
 
-		if (s->sin_addr.s_addr == me->sin_addr.s_addr) {
+		if (s && m && s->sin_addr.s_addr == me->sin_addr.s_addr) {
 			*mask = m->sin_addr.s_addr;
 			return 0;
 		}