VPNaaS: Cisco fix validation for GW IP

The validation to check that the router has a GW IP
for the Cisco service driver was trying to directly
get the gw_port information, which is not available, as
the validator only has a dict of the vpn_service info.

Modified validator to get the router object (not a
dict representation), using the vpn_service's router_id
and then check the attributes for the router directly.

Change-Id: I48286cda23d9737ddd90251dc0d1db1c310e7784
Closes-Bug: 1356127

neutron/services/vpn/service_drivers/cisco_validator.py

@@ -73,9 +73,9 @@ class CiscoCsrVpnValidator(vpn_validator.VpnReferenceValidator):
                                        key='mtu',
                                        value=mtu)
 
-    def validate_public_ip_present(self, vpn_service):
+    def validate_public_ip_present(self, router):
         """Ensure there is one gateway IP specified for the router used."""
-        gw_port = vpn_service.router.gw_port
+        gw_port = router.gw_port
         if not gw_port or len(gw_port.fixed_ips) != 1:
             raise CsrValidationFailure(resource='IPSec Connection',
                                        key='router:gw_port:ip_address',
@@ -106,11 +106,11 @@ class CiscoCsrVpnValidator(vpn_validator.VpnReferenceValidator):
             context, ipsec_sitecon['ipsecpolicy_id'])
         vpn_service = self.service_plugin.get_vpnservice(
             context, ipsec_sitecon['vpnservice_id'])
+        router = self.l3_plugin._get_router(context, vpn_service['router_id'])
         self.validate_lifetime('IKE Policy', ike_policy)
         self.validate_lifetime('IPSec Policy', ipsec_policy)
         self.validate_ike_version(ike_policy)
         self.validate_mtu(ipsec_sitecon)
-        self.validate_public_ip_present(vpn_service)
+        self.validate_public_ip_present(router)
         self.validate_peer_id(ipsec_sitecon)
-        LOG.debug("IPSec connection %s validated for Cisco CSR",
-                  ipsec_sitecon['id'])
+        LOG.debug("IPSec connection validated for Cisco CSR")

neutron/tests/unit/services/vpn/service_drivers/test_cisco_ipsec.py

@@ -83,7 +83,8 @@ class TestCiscoIPsecDriverValidation(base.BaseTestCase):
         mock.patch('neutron.manager.NeutronManager.get_plugin',
                    return_value=self.core_plugin).start()
         self.context = n_ctx.Context('some_user', 'some_tenant')
-        self.vpn_service = mock.Mock()
+        self.vpn_service = {'router_id': '123'}
+        self.router = mock.Mock()
         self.service_plugin = mock.Mock()
         self.validator = validator.CiscoCsrVpnValidator(self.service_plugin)
 
@@ -167,23 +168,25 @@ class TestCiscoIPsecDriverValidation(base.BaseTestCase):
         """Helper function indicating that tunnel has a gateway IP."""
         def have_one():
             return 1
-        self.vpn_service.router.gw_port.fixed_ips.__len__ = have_one
+        self.router.gw_port.fixed_ips.__len__ = have_one
         ip_addr_mock = mock.Mock()
-        self.vpn_service.router.gw_port.fixed_ips = [ip_addr_mock]
-        return ip_addr_mock
+        self.router.gw_port.fixed_ips = [ip_addr_mock]
 
     def test_have_public_ip_for_router(self):
         """Ensure that router for IPSec connection has gateway IP."""
         self.simulate_gw_ip_available()
-        self.validator.validate_public_ip_present(self.vpn_service)
+        try:
+            self.validator.validate_public_ip_present(self.router)
+        except Exception:
+            self.fail("Unexpected exception on validation")
 
     def test_router_with_missing_gateway_ip(self):
         """Failure test of IPSec connection with missing gateway IP."""
         self.simulate_gw_ip_available()
-        self.vpn_service.router.gw_port = None
+        self.router.gw_port = None
         self.assertRaises(validator.CsrValidationFailure,
                           self.validator.validate_public_ip_present,
-                          self.vpn_service)
+                          self.router)
 
     def test_peer_id_is_an_ip_address(self):
         """Ensure peer ID is an IP address for IPsec connection create."""
@@ -206,6 +209,7 @@ class TestCiscoIPsecDriverValidation(base.BaseTestCase):
             return_value={'lifetime': {'units': 'seconds', 'value': 120}})
         self.service_plugin.get_vpnservice = mock.Mock(
             return_value=self.vpn_service)
+        self.l3_plugin._get_router = mock.Mock(return_value=self.router)
         # Provide the minimum needed items to validate
         ipsec_sitecon = {'id': '1',
                          'vpnservice_id': FAKE_SERVICE_ID,