(legacy) code cleanup rc.initial.banner

src/etc/rc.initial.banner

@@ -51,39 +51,42 @@ foreach($iflist as $ifname => $friendly) {
 	/* point to this interface's config */
 	$ifconf = $config['interfaces'][$ifname];
 	/* look for 'special cases' */
-	switch($ifconf['ipaddr']) {
-	case "dhcp":
-		$class = "/DHCP4";
-		break;
-	case "pppoe":
-		$class = "/PPPoE";
-		break;
-	case "pptp":
-		$class = "/PPTP";
-		break;
-	case "l2tp":
-		$class = "/L2TP";
-		break;
-	default:
-		$class = "";
-		break;
+	$class = "";
+	if (isset($ifconf['ipaddr'])) {
+		switch($ifconf['ipaddr']) {
+		case "dhcp":
+			$class = "/DHCP4";
+			break;
+		case "pppoe":
+			$class = "/PPPoE";
+			break;
+		case "pptp":
+			$class = "/PPTP";
+			break;
+		case "l2tp":
+			$class = "/L2TP";
+			break;
+		}
 	}
-	switch($ifconf['ipaddrv6']) {
-	case "dhcp6":
-		$class6 = "/DHCP6";
-		break;
-	case "slaac":
-		$class6 = "/SLAAC";
-		break;
-	case "6rd":
-		$class6 = "/6RD";
-		break;
-	case "6to4":
-		$class6 = "/6to4";
-		break;
-	case "track6":
-		$class6 = "/t6";
-		break;
+	$class6 = null;
+	if (isset($ifconf['ipaddrv6'])) {
+		switch($ifconf['ipaddrv6']) {
+		case "dhcp6":
+			$class6 = "/DHCP6";
+			break;
+		case "slaac":
+			$class6 = "/SLAAC";
+			break;
+		case "6rd":
+			$class6 = "/6RD";
+			break;
+		case "6to4":
+			$class6 = "/6to4";
+			break;
+		case "track6":
+			$class6 = "/t6";
+			break;
+		}
 	}
 	$ipaddr = get_interface_ip($ifname);
 	$subnet = get_interface_subnet($ifname);