1 files changed, 88 insertions, 0 deletions
diff --git a/netmodel/interfaces/socket/udp.py b/netmodel/interfaces/socket/udp.py
new file mode 100644
index 00000000..d3fdb696
--- /dev/null
+++ b/netmodel/interfaces/socket/udp.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Copyright (c) 2017 Cisco and/or its affiliates.
+#
+# 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.
+#
+
+import asyncio
+
+from netmodel.interfaces.socket import ServerProtocol, ClientProtocol
+from netmodel.interfaces.socket import SocketClient, SocketServer
+from netmodel.network.interface import Interface
+
+DEFAULT_ADDRESS = '127.0.0.1'
+DEFAULT_PORT    = 7000
+
+class UDPProtocol:
+
+    def send_impl(self, data):
+        msg = data.encode()
+        self._transport.sendto(msg)
+
+    # asyncio.Protocol
+
+    def datagram_received(self, data, addr):
+        msg = data.decode()
+        self.receive(msg, ingress_interface=self)
+
+    def error_received(self, exc):
+        print('Error received:', exc)
+
+class UDPServerProtocol(UDPProtocol, ServerProtocol, Interface):
+    __interface__ = 'udp'
+
+    def __init__(self, *args, **kwargs):
+        # Note: super() does not call all parents' constructors
+        Interface.__init__(self, *args, **kwargs)
+        ServerProtocol.__init__(self)
+
+class UDPClientProtocol(UDPProtocol, ClientProtocol):
+    pass
+
+#------------------------------------------------------------------------------
+
+class UDPServerInterface(SocketServer, Interface):
+    __interface__ = 'udpserver'
+
+    def __init__(self, *args, **kwargs):
+        SocketServer.__init__(self)
+        self._address = kwargs.pop('address', DEFAULT_ADDRESS)
+        self._port = kwargs.pop('port', DEFAULT_PORT)
+        Interface.__init__(self, *args, **kwargs)
+
+    def new_protocol(self):
+        p = UdpServerProtocol(callback = self._callback, hook=self._hook)
+        self.spawn_interface(p)
+        return p
+
+    def _create_socket(self):
+        loop = asyncio.get_event_loop()
+        return loop.create_datagram_endpoint(self.new_protocol,
+                local_addr=(self._address, self._port))
+
+class UDPClientInterface(SocketClient, Interface):
+    __interface__ = 'udpclient'
+
+    def __init__(self, *args, **kwargs):
+        SocketClient.__init__(self)
+        self._address = kwargs.pop('address', DEFAULT_ADDRESS)
+        self._port = kwargs.pop('port', DEFAULT_PORT)
+        Interface.__init__(self, *args, **kwargs)
+
+    def _create_socket(self):
+        loop = asyncio.get_event_loop()
+        protocol = lambda : UDPClientProtocol(self)
+        return loop.create_datagram_endpoint(protocol,
+                remote_addr=(self._address, self._port))