--- parms.c	2017-04-29 22:06:59.0 +0100
+++ parms.c	2017-04-29 22:06:59.0 +0100
@@ -334,6 +334,7 @@ 
 		ifp->int_mask = netmask;
 		ifp->int_ripv1_mask = netmask;
 		ifp->int_std_mask = std_mask(gate);
+		ifp->int_rip_sock = -1;
 		ifp->int_net = ntohl(dst);
 		ifp->int_std_net = ifp->int_net & ifp->int_std_mask;
 		ifp->int_std_addr = htonl(ifp->int_std_net);