Allow linux tap to use routes

Change-Id: I7bbebca40b7070f3944ba64029171c8bf471cd51
(cherry picked from commit 1ae025476f)

.gitignore

@@ -48,3 +48,6 @@ ChangeLog
 # Editors
 *~
 .*.swp
+
+# Visual Studio Code
+.vscode

os_net_config/impl_ifcfg.py

@@ -1102,6 +1102,12 @@ class IfcfgNetConfig(os_net_config.NetConfig):
         data = self._add_common(linux_tap)
         data += "TYPE=Tap\n"
         self.interface_data[linux_tap.name] = data
+        if linux_tap.routes:
+            self._add_routes(linux_tap.name,
+                             linux_tap.routes)
+        if linux_tap.rules:
+            self._add_rules(linux_tap.name,
+                            linux_tap.rules)
 
     def generate_ivs_config(self, ivs_uplinks, ivs_interfaces):
         """Generate configuration content for ivs."""

os_net_config/tests/test_impl_ifcfg.py

@@ -602,15 +602,23 @@ DRIVER=uio_pci_generic
 CPU_LIST=2,3
 """
 
+_LINUX_TAP_ROUTES = """default via 192.168.1.1 dev tap0 metric 10
+172.19.0.0/24 via 192.168.1.1 dev tap0
+172.20.0.0/24 via 192.168.1.5 dev tap0 metric 100
+"""
+
 _LINUX_TAP_IFACE = """# This file is autogenerated by os-net-config
 DEVICE=tap0
 ONBOOT=yes
 HOTPLUG=no
 NM_CONTROLLED=no
 PEERDNS=no
-BOOTPROTO=none
+BOOTPROTO=static
+IPADDR=192.168.1.2
+NETMASK=255.255.255.0
 TYPE=Tap
 """
+
 _SRIOV_PF_IFCFG = """# This file is autogenerated by os-net-config
 DEVICE=enp3s0f0
 ONBOOT=yes
@@ -1155,11 +1163,22 @@ class TestIfcfgNetConfig(base.TestCase):
         self.assertEqual('', self.get_route_config('vhost0'))
 
     def test_add_linux_tap(self):
-        tap = objects.LinuxTap('tap0', nm_controlled=False)
+        v4_addr = objects.Address('192.168.1.2/24')
+        route1 = objects.Route('192.168.1.1', default=True,
+                               route_options="metric 10")
+        route2 = objects.Route('192.168.1.1', '172.19.0.0/24')
+        route3 = objects.Route('192.168.1.5', '172.20.0.0/24',
+                               route_options="metric 100")
+        tap = objects.LinuxTap('tap0', addresses=[v4_addr],
+                               nm_controlled=False,
+                               routes=[route1, route2, route3])
         self.provider.add_linux_tap(tap)
         self.assertEqual(
             _LINUX_TAP_IFACE,
-            self.provider.interface_data['tap0'])
+            self.get_interface_config('tap0'))
+        self.assertEqual(
+            _LINUX_TAP_ROUTES,
+            self.get_route_config('tap0'))
 
     def test_add_vlan(self):
         vlan = objects.Vlan('em1', 5)