Remove third_party/twisted_8_1

third_party/twisted_8_1/twisted/pair/ethernet.py

-# -*- test-case-name: twisted.pair.test.test_ethernet -*-
-# Copyright (c) 2001-2004 Twisted Matrix Laboratories.
-# See LICENSE for details.
-
-#
-
-
-"""Support for working directly with ethernet frames"""
-
-import struct
-
-
-from twisted.internet import protocol
-from twisted.pair import raw
-from zope.interface import implements, Interface
-
-
-class IEthernetProtocol(Interface):
-    """An interface for protocols that handle Ethernet frames"""
-    def addProto():
-        """Add an IRawPacketProtocol protocol"""
-
-    def datagramReceived():
-        """An Ethernet frame has been received"""
-
-class EthernetHeader:
-    def __init__(self, data):
-
-        (self.dest, self.source, self.proto) \
-                    = struct.unpack("!6s6sH", data[:6+6+2])
-
-class EthernetProtocol(protocol.AbstractDatagramProtocol):
-
-    implements(IEthernetProtocol)
-    
-    def __init__(self):
-        self.etherProtos = {}
-
-    def addProto(self, num, proto):
-        proto = raw.IRawPacketProtocol(proto)
-        if num < 0:
-            raise TypeError, 'Added protocol must be positive or zero'
-        if num >= 2**16:
-            raise TypeError, 'Added protocol must fit in 16 bits'
-        if num not in self.etherProtos:
-            self.etherProtos[num] = []
-        self.etherProtos[num].append(proto)
-
-    def datagramReceived(self, data, partial=0):
-        header = EthernetHeader(data[:14])
-        for proto in self.etherProtos.get(header.proto, ()):
-            proto.datagramReceived(data=data[14:],
-                                   partial=partial,
-                                   dest=header.dest,
-                                   source=header.source,
-                                   protocol=header.proto)