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53 lines
1.8 KiB
Python
53 lines
1.8 KiB
Python
# Copyright 2021-2022 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# -----------------------------------------------------------------------------
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# Imports
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# -----------------------------------------------------------------------------
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import asyncio
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import logging
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from .common import Transport, StreamPacketSource, StreamPacketSink
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# -----------------------------------------------------------------------------
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# Logging
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# -----------------------------------------------------------------------------
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logger = logging.getLogger(__name__)
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# -----------------------------------------------------------------------------
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async def open_tcp_client_transport(spec):
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'''
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Open a TCP client transport.
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The parameter string has this syntax:
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<remote-host>:<remote-port>
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Example: 127.0.0.1:9001
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'''
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class TcpPacketSource(StreamPacketSource):
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def connection_lost(self, error):
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logger.debug(f'connection lost: {error}')
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self.terminated.set_result(error)
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remote_host, remote_port = spec.split(':')
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tcp_transport, packet_source = await asyncio.get_running_loop().create_connection(
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lambda: TcpPacketSource(),
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host=remote_host,
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port=int(remote_port),
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)
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packet_sink = StreamPacketSink(tcp_transport)
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return Transport(packet_source, packet_sink)
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