udp-port can now be unset, and that will disable listening to UDP.

NEWS

@@ -4,6 +4,8 @@
   compatibility. Patch by Kevin Cernekee.
 - When a new connection presents a cookie of an existing session
   the previous session is disconnected (and its IP is hijacked).
+- If udp-port is unset or set to zero then the server will not listen
+  for UDP sessions.
 
 
 * Version 0.2.2 (released 2013-11-23)

src/config.c

@@ -452,9 +452,6 @@ static void check_cfg( struct cfg_st *config)
 	if (config->dpd == 0)
 		config->keepalive = 60;
 
-	if (config->udp_port == 0)
-		config->udp_port = config->port;
-	
 	if (config->priorities == NULL)
 		config->priorities = "NORMAL:%SERVER_PRECEDENCE:%COMPAT";
 }

src/main.c

@@ -209,6 +209,7 @@ listen_ports(struct cfg_st* config, struct listen_list_st *list, const char *nod
 		exit(1);
 	}
 
+	if (config->udp_port) {
 		snprintf(portname, sizeof(portname), "%d", config->udp_port);
 
 		memset(&hints, 0, sizeof(hints));
@@ -232,6 +233,7 @@ listen_ports(struct cfg_st* config, struct listen_list_st *list, const char *nod
 		}
 	
 		freeaddrinfo(res);
+	}
 
 	return 0;
 }