nmstate: fix definition of IPv4 defult route interface

- Use interface name rather than interface device, as it is done for IPv6
- Fix test for vlan0 to match this change (previous test incorrect)
- Add a test for vlan1.123 to check correct definition of VLAN paramters when
  the VLAN ID is specified in the interface name and the device parameter is
  ommitted

ncm-network/src/main/perl/nmstate.pm

@@ -47,7 +47,9 @@ use constant BOND_MASTER_STARTS_SLAVES => 0;
 sub iface_filename
 {
     my ($self, $iface) = @_;
-    return $self->IFCFG_DIR . "/$iface.yml";
+    my $filename = $self->IFCFG_DIR . "/$iface.yml";
+    $self->verbose("Interface $iface configuration file: $filename");
+    return $filename;
 }
 
 # Determine if this is a valid interface for ncm-network to manage,
@@ -507,7 +509,7 @@ sub generate_nmstate_config
                 $self->debug(3, "Adding the default IPv4 gateway to interface '$name'");
                 $default_rt{destination} = '0.0.0.0/0';
                 $default_rt{'next-hop-address'} = $default_gw;
-                $default_rt{'next-hop-interface'} = $device;
+                $default_rt{'next-hop-interface'} = $name;
             }
         }
     }

ncm-network/src/test/perl/nmstate_advance.t

@@ -115,12 +115,41 @@ routes:
     state: absent
   - destination: 0.0.0.0/0
     next-hop-address: 4.3.2.254
-    next-hop-interface: eth0.123
+    next-hop-interface: vlan0
   - destination: 1.2.3.4/32
     next-hop-interface: vlan0
 EOF
 
 
+Readonly my $VLAN1_123_YML => <<EOF;
+# File generated by NCM::Component::nmstate. Do not edit
+---
+interfaces:
+- ipv4:
+    address:
+    - ip: 4.3.2.1
+      prefix-length: 24
+    dhcp: false
+    enabled: true
+  name: vlan1.123
+  profile-name: vlan1.123
+  state: up
+  type: vlan
+  vlan:
+    base-iface: eth0
+    id: '123'
+routes:
+  config:
+  - next-hop-interface: vlan1.123
+    state: absent
+  - destination: 0.0.0.0/0
+    next-hop-address: 4.3.2.254
+    next-hop-interface: vlan1.123
+  - destination: 1.2.3.4/32
+    next-hop-interface: vlan1.123
+EOF
+
+
 Readonly my $DHCP_YML => <<EOF;
 # File generated by NCM::Component::nmstate. Do not edit
 ---
@@ -304,7 +333,10 @@ my $vlanyml = get_file_contents("/etc/nmstate/eth0.123.yml");
 is($vlanyml, $VLAN_YML, "Exact eth0.123 vlan yml config");
 
 my $vlanyml2 = get_file_contents("/etc/nmstate/vlan0.yml");
-is($vlanyml2, $VLAN0_YML, "Exact vlan0  yml config");
+is($vlanyml2, $VLAN0_YML, "Exact vlan0 yml config");
+
+my $vlanyml3 = get_file_contents("/etc/nmstate/vlan1.123.yml");
+is($vlanyml3, $VLAN1_123_YML, "Exact vlan1.123 yml config");
 
 my $ibyml = get_file_contents("/etc/nmstate/ib0.yml");
 is($ibyml, $IB_YML, "Exact ib0 yml config");
@@ -332,8 +364,8 @@ ok(command_history_ok([
   '/usr/bin/nmstatectl apply /etc/nmstate/ib0.yml',
   '/usr/bin/nmstatectl apply /etc/nmstate/ib1.12345.yml',
   '/usr/bin/nmstatectl apply /etc/nmstate/vlan0.yml',
+  '/usr/bin/nmstatectl apply /etc/nmstate/vlan1.123.yml',
   '/usr/bin/nmstatectl apply /etc/nmstate/bond0.yml',
 ], []));
 
-
 done_testing();

ncm-network/src/test/resources/nmstate_advance.pan

@@ -36,13 +36,19 @@ prefix "/system/network/interfaces/eth0.123";
 "physdev" = "eth0";
 "route/0" = dict("address", "1.2.3.4");
 
-# test vlan interface route on vlan for backward compatibily with network.pm
-"/system/network/interfaces/vlan0" = create("defaultinterface");
+# test vlan interface vlan0 (interface ID=0/false, no VLAN ID in interface name)
+"/system/network/interfaces/vlan0" = create("vlaninterface");
 prefix "/system/network/interfaces/vlan0";
 "device" = "eth0.123";
 "physdev" = "eth0";
 "route/0" = dict("address", "1.2.3.4");
 
+# test vlan interface vlan1.123 (interface ID=1/true, VLAN ID in interface name)
+"/system/network/interfaces/vlan1.123" = create("vlaninterface");
+prefix "/system/network/interfaces/vlan1.123";
+"physdev" = "eth0";
+"route/0" = dict("address", "1.2.3.4");
+
 # test ib interface (default and with pkey)
 prefix "/system/network/interfaces/ib0";
 "ip" = "10.11.12.13";
@@ -72,4 +78,4 @@ prefix "/system/network/interfaces/eth4";
 "aliases/dba/broadcast" = "4.3.2.255";
 "aliases/dba/fqdn" = "host-alias1.quattor.com";
 "aliases/dba/ip" = "4.3.2.12";
-"aliases/dba/netmask" = "255.255.255.0";
+"aliases/dba/netmask" = "255.255.255.0";