shell: support routes without gateway

diff --git a/dummy/netifd-proto.sh b/dummy/netifd-proto.sh
index 69aa27d..7482a83 100755 (executable)
--- a/dummy/netifd-proto.sh
+++ b/dummy/netifd-proto.sh
@@ -127,7 +127,7 @@ _proto_push_route() {
        json_add_object ""
        json_add_string target "$target"
        json_add_string netmask "$mask"
-       json_add_string gateway "$gw"
+       [ -n "$gw" ] && json_add_string gateway "$gw"
        json_close_object
 }