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#!/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
from netmodel.util.misc import silentremove
DEFAULT_PATH = '/tmp/unix_interface'
class UnixProtocol:
def send_impl(self, data):
msg = data.encode()
self._transport.write(msg)
def data_received(self, data):
"""
Called when some data is received.
The argument is a bytes object.
"""
msg = data.decode()
self.receive(msg, ingress_interface=self)
class UnixServerProtocol(UnixProtocol, ServerProtocol, Interface):
__interface__ = 'unix'
def __init__(self, *args, **kwargs):
# Note: super() does not call all parents' constructors
Interface.__init__(self, *args, **kwargs)
ServerProtocol.__init__(self)
class UnixClientProtocol(UnixProtocol, ClientProtocol):
pass
#------------------------------------------------------------------------------
class UnixServerInterface(SocketServer, Interface):
__interface__ = 'unixserver'
def __init__(self, *args, **kwargs):
SocketServer.__init__(self)
self._path = kwargs.pop('path', DEFAULT_PATH)
Interface.__init__(self, *args, **kwargs)
def terminate(self):
silentremove(self._path)
def new_protocol(self):
p = UnixServerProtocol(callback=self._callback, hook=self._hook)
self.spawn_interface(p)
return p
def _create_socket(self):
loop = asyncio.get_event_loop()
silentremove(self._path)
return loop.create_unix_server(self.new_protocol, self._path)
class UnixClientInterface(SocketClient, Interface):
__interface__ = 'unixclient'
def __init__(self, *args, **kwargs):
SocketClient.__init__(self)
self._path = kwargs.pop('path', DEFAULT_PATH)
Interface.__init__(self, *args, **kwargs)
def _create_socket(self):
loop = asyncio.get_event_loop()
protocol = lambda : UnixClientProtocol(self)
return loop.create_unix_connection(protocol, self._path)
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