68 lines
2 KiB
Python
68 lines
2 KiB
Python
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""" Multicast DNS Service Discovery for Python, v0.14-wmcbrine
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Copyright 2003 Paul Scott-Murphy, 2014 William McBrine
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This module provides a framework for the use of DNS Service Discovery
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using IP multicast.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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USA
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"""
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import asyncio
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import socket
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from typing import Tuple
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class _WrappedTransport:
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"""A wrapper for transports."""
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__slots__ = (
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'transport',
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'is_ipv6',
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'sock',
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'fileno',
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'sock_name',
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)
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def __init__(
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self,
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transport: asyncio.DatagramTransport,
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is_ipv6: bool,
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sock: socket.socket,
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fileno: int,
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sock_name: Tuple,
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) -> None:
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"""Initialize the wrapped transport.
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These attributes are used when sending packets.
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"""
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self.transport = transport
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self.is_ipv6 = is_ipv6
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self.sock = sock
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self.fileno = fileno
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self.sock_name = sock_name
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def make_wrapped_transport(transport: asyncio.DatagramTransport) -> _WrappedTransport:
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"""Make a wrapped transport."""
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sock: socket.socket = transport.get_extra_info('socket')
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return _WrappedTransport(
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transport=transport,
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is_ipv6=sock.family == socket.AF_INET6,
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sock=sock,
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fileno=sock.fileno(),
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sock_name=sock.getsockname(),
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)
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