$NetBSD: patch-ab,v 1.3 2013/11/08 21:16:43 joerg Exp $

--- socklib.c.orig	2006-05-23 22:19:49.000000000 +0000
+++ socklib.c
@@ -368,7 +368,7 @@ int setTtl(int sock, int ttl) {
     return setsockopt(sock, SOL_IP, IP_MULTICAST_TTL, (char*)&ttl, sizeof(int));
 }
 
-#ifdef SIOCGIFINDEX
+#if defined(SIOCGIFINDEX) && !defined(__NetBSD__)
 # define IP_MREQN ip_mreqn
 #else
 # define IP_MREQN ip_mreq
@@ -382,7 +382,7 @@ int setTtl(int sock, int ttl) {
  */
 static int fillMreq(int sock, net_if_t *net_if, struct in_addr addr,
 		    struct IP_MREQN *mreq) {
-#ifdef SIOCGIFINDEX
+#if defined(SIOCGIFINDEX) && !defined(__NetBSD__)
     mreq->imr_ifindex = net_if->index;
     mreq->imr_address.s_addr = 0;
 #else
@@ -879,6 +879,9 @@ int makeSocket(addr_type_t addr_type, 
     int ret, s;
     struct sockaddr_in myaddr;
     in_addr_t ip=0;
+#ifdef SO_REUSEPORT
+    int one = 1;
+#endif
 
 #ifdef WINDOWS
     static int lastSocket=-1;
@@ -897,6 +900,10 @@ int makeSocket(addr_type_t addr_type, 
 	exit(1);
     }
 
+#ifdef SO_REUSEPORT
+    ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));
+#endif
+
     if(addr_type == ADDR_TYPE_MCAST && tmpl != NULL) {
 	ip = tmpl->sin_addr.s_addr;
     }