Fixes #622. Add a new file status for signaling default gateway under…

… /tmp. dhclient script will check for this file to define if the interface needs a default gateway or not from its given routes.

etc/inc/system.inc

@@ -263,15 +263,29 @@ function system_routing_configure() {
 	$interfacegw = "";
 	/* tack on all the hard defined gateways as well */
 	if (is_array($config['gateways']['gateway_item'])) {
+		mwexec("/bin/rm {$g['tmp_path']}/*_defaultgw");
+		$foundgw = false;
 		foreach	($config['gateways']['gateway_item'] as $gateway) {
 			if (isset($gateway['defaultgw'])) {
 				if ($gateway['gateway'] == "dynamic")
 					$gateway['gateway'] = get_interface_gateway($gateway['interface']);
 				$gatewayip = $gateway['gateway'];
 				$interfacegw = $gateway['interface'];
+				if (!empty($interfacegw)) {
+					$defaultif = get_real_interface($gateway['interface']);
+					if ($defaultif)
+						@file_put_contents("{$g['tmp_path']}/{$defaultif}_defaultgw", $gatewayip);
+				}
+				$foundgw = true;
 				break;
 			}
 		}
+		if ($foundgw == false) {
+			$defaultif = get_real_interface("wan");
+			$interfacegw = "wan";
+			$gatewayip = get_interface_gateway("wan");
+			@touch("{$g['tmp_path']}/{$defaultif}_defaultgw");
+		}	
 	}
 	$dont_add_route = false;
 	/* if OLSRD is enabled, allow WAN to house DHCP. */
@@ -1418,4 +1432,4 @@ function system_get_dmesg_boot() {
 	return file_get_contents("{$g['varlog_path']}/dmesg.boot");
 }
 
-?>
+?>

sbin/dhclient-script

@@ -130,23 +130,22 @@ delete_old_routes() {
 }
 
 add_new_routes() {
-	$LOGGER "Adding new routes"
-	# $ROUTE add $new_ip_address $LOCALHOST >/dev/null 2>&1
+	$LOGGER "Adding new routes to interface: $interface"
 
 	# Only allow the default route to be overridden if it's on our own interface
-	DEFAULTROUTE_IFACE=`/sbin/route get default | grep interface | awk '{print $2};'`
-	if [ -z "${DEFAULTROUTE_IFACE}" -o "{$interface}" = "${DEFAULTROUTE_IFACE}" ]; then
+	if [ -f "/tmp/${interface}_defaultgw" ]; then
+		$ROUTE delete default
 		for router in $new_routers; do
 			if [ "$new_ip_address" = "$router" ]; then
-				$ROUTE add default -iface $router
-				#>/dev/null 2>&1
-				echo $ROUTE add default -iface $router | $LOGGER
-				echo $new_routers > /tmp/${interface}_router
+				$ROUTE add default -iface $interface
+				echo $ROUTE add default -iface $interface | $LOGGER
+				echo $router > /tmp/${interface}_router
+				echo $router > /tmp/${interface}_defaultgw
 			else
 				$ROUTE add default $router
 				echo $ROUTE add default $router | $LOGGER
-				#>/dev/null 2>&1
-                       		echo $new_routers > /tmp/${interface}_router
+                       		echo $router > /tmp/${interface}_router
+				echo $router > /tmp/${interface}_defaultgw
 			fi
 			# 2nd and subsequent default routers error out, so explicitly
 			# stop processing the list after the first one.
@@ -163,13 +162,6 @@ add_new_routes() {
                         echo $new_routers > /tmp/${interface}_router
 		done
 	fi
-
-	# last ditch effort if no route exists.
-	DEFAULTROUTE=`$NETSTAT -rn | $GREP default`
-	if [ -z "${DEFAULTROUTE}" ]; then
-	    $ROUTE add default -iface $interface
-	fi
-
 }
 
 add_new_resolv_conf() {