BGPSpeaker/info_base: Add tables for L2VPN Flow Spec

Signed-off-by: Satoshi Fujimoto <satoshi.fujimoto7@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

ryu/services/protocols/bgp/info_base/l2vpnfs.py

@@ -0,0 +1,66 @@
+# Copyright (C) 2017 Nippon Telegraph and Telephone Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+ Defines data types and models required specifically for
+ L2VPN Flow Specification support.
+"""
+
+import logging
+
+from ryu.lib.packet.bgp import FlowSpecL2VPNNLRI
+from ryu.lib.packet.bgp import RF_L2VPN_FLOWSPEC
+
+from ryu.services.protocols.bgp.info_base.vpn import VpnDest
+from ryu.services.protocols.bgp.info_base.vpn import VpnPath
+from ryu.services.protocols.bgp.info_base.vpn import VpnTable
+
+LOG = logging.getLogger('bgpspeaker.info_base.l2vpnfs')
+
+
+class L2VPNFlowSpecDest(VpnDest):
+    """L2VPN Flow Specification Destination
+
+    Store Flow Specification Paths.
+    """
+    ROUTE_FAMILY = RF_L2VPN_FLOWSPEC
+
+
+class L2VPNFlowSpecTable(VpnTable):
+    """Global table to store L2VPN Flow Specification routing information.
+
+    Uses `L2VPNFlowSpecDest` to store destination information for each known
+    Flow Specification paths.
+    """
+    ROUTE_FAMILY = RF_L2VPN_FLOWSPEC
+    VPN_DEST_CLASS = L2VPNFlowSpecDest
+
+
+class L2VPNFlowSpecPath(VpnPath):
+    """Represents a way of reaching an L2VPN Flow Specification destination."""
+    ROUTE_FAMILY = RF_L2VPN_FLOWSPEC
+    VRF_PATH_CLASS = None  # defined in init - anti cyclic import hack
+    NLRI_CLASS = FlowSpecL2VPNNLRI
+
+    def __init__(self, *args, **kwargs):
+        # Set dummy IP address.
+        kwargs['nexthop'] = '0.0.0.0'
+        super(L2VPNFlowSpecPath, self).__init__(*args, **kwargs)
+        from ryu.services.protocols.bgp.info_base.vrfl2vpnfs import(
+            L2vpnFlowSpecPath)
+        self.VRF_PATH_CLASS = L2vpnFlowSpecPath
+        # Because the L2VPN Flow Specification does not require nexthop,
+        # initialize with None.
+        self._nexthop = None

ryu/services/protocols/bgp/info_base/vrfl2vpnfs.py

@@ -0,0 +1,58 @@
+# Copyright (C) 2017 Nippon Telegraph and Telephone Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+ Defines data types and models required specifically
+ for L2VPN support.
+ Represents data structures for VRF not VPN/global.
+ (Inside VRF you have L2VPN Flow Specification prefixes
+ and inside VPN you have L2VPN Flow Specification prefixes)
+"""
+
+import logging
+
+from ryu.lib.packet.bgp import RF_L2VPN_FLOWSPEC
+from ryu.lib.packet.bgp import FlowSpecL2VPNNLRI
+
+from ryu.services.protocols.bgp.info_base.l2vpnfs import L2VPNFlowSpecPath
+from ryu.services.protocols.bgp.info_base.vrffs import VRFFlowSpecDest
+from ryu.services.protocols.bgp.info_base.vrffs import VRFFlowSpecPath
+from ryu.services.protocols.bgp.info_base.vrffs import VRFFlowSpecTable
+
+LOG = logging.getLogger('bgpspeaker.info_base.vrfl2vpnfs')
+
+
+class L2vpnFlowSpecPath(VRFFlowSpecPath):
+    """Represents a way of reaching an IP destination with
+    a L2VPN Flow Specification.
+    """
+    ROUTE_FAMILY = RF_L2VPN_FLOWSPEC
+    VPN_PATH_CLASS = L2VPNFlowSpecPath
+    VPN_NLRI_CLASS = FlowSpecL2VPNNLRI
+
+
+class L2vpnFlowSpecDest(VRFFlowSpecDest):
+    ROUTE_FAMILY = RF_L2VPN_FLOWSPEC
+
+
+class L2vpnFlowSpecTable(VRFFlowSpecTable):
+    """Virtual Routing and Forwarding information base
+    for L2VPN Flow Specification.
+    """
+    ROUTE_FAMILY = RF_L2VPN_FLOWSPEC
+    VPN_ROUTE_FAMILY = RF_L2VPN_FLOWSPEC
+    NLRI_CLASS = FlowSpecL2VPNNLRI
+    VRF_PATH_CLASS = L2vpnFlowSpecPath
+    VRF_DEST_CLASS = L2vpnFlowSpecDest