48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
# Demux loader: imports a demux module appropriate for this platform.
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# Written by Ray Brown.
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"""UDP Demux
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A UDP demux is a wrapper for a datagram socket. The demux must be initialized
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with an unconnected datagram socket, referred to as the root socket. Once
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initialized, the demux will create new connections to peer endpoints upon
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arrival of datagrams from a new endpoint. Such a connection is of a
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socket-derived type, and will receive datagrams only from the peer endpoint for
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which it was created, and that are sent to the root socket.
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Connections must be used for receiving datagrams only. Outgoing traffic should
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be sent through the root socket.
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Varying implementations of this functionality are provided for different
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platforms.
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"""
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import sys
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if sys.platform.startswith('win') or sys.platform.startswith('cygwin'):
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from router import UDPDemux
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_routing = True
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else:
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from osnet import UDPDemux
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_routing = False
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_default_demux = None
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def force_routing_demux():
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global _routing
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if _routing:
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return False # no change - already loaded
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global UDPDemux, _default_demux
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import router
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_default_demux = UDPDemux
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UDPDemux = router.UDPDemux
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_routing = True
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return True # new router loaded and switched
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def reset_default_demux():
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global UDPDemux, _routing, _default_demux
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if _default_demux:
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UDPDemux = _default_demux
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_default_demux = None
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_routing = not _routing
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__all__ = ["UDPDemux", "force_routing_demux", "reset_default_demux"]
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