(legacy) cleanup rc.interfaces_wan_configure

src/etc/inc/util.inc

@@ -339,7 +339,11 @@ function is_ipaddrv6($ipaddr) {
 		$tmpip = explode("%", $ipaddr);
 		$ipaddr = $tmpip[0];
 	}
-	return Net_IPv6::checkIPv6($ipaddr);
+	if (strpos($ipaddr, ":") === false) {
+		return false;
+	} else {
+		return Net_IPv6::checkIPv6($ipaddr);
+	}
 }
 
 /* returns true if $ipaddr is a valid dotted IPv4 address */

src/etc/rc.interfaces_wan_configure

@@ -31,10 +31,11 @@ require_once("config.inc");
 require_once("functions.inc");
 require_once("filter.inc");
 
-$argument = str_replace("\n", "", $argv[1]);
-if (empty($argument))
-	interface_configure("wan");
-else {
-	if (!empty($config['interfaces'][$argument]))
+if (!empty($argv[1])) {
+	$argument = str_replace("\n", "", $argv[1]);
+	if (!empty($config['interfaces'][$argument])) {
 		interface_configure($argument);
+	}
+} else {
+	interface_configure("wan");
 }