root/trunk/twisted/pair/rawudp.py

Revision 17451, 1.8 KB (checked in by foom, 4 years ago)

Remove twisted.components.Interface completely.

Merges: killtpc-1636-2
Authors: glyph, therve, jknight
Reviewer: exarkun

Remove deprecated twisted.python.components functionality:
MetaInterface, Interface, getAdapterClass, and
getAdapterClassWithInheritance.

Also convert all twisted interfaces to use zope.interface directly
(including removing "self" argument), and remove redundant tests.

Line 
1# -*- test-case-name: twisted.pair.test.test_rawudp -*-
2# Copyright (c) 2001-2004 Twisted Matrix Laboratories.
3# See LICENSE for details.
4
5#
6
7"""Implementation of raw packet interfaces for UDP"""
8
9import struct
10
11from twisted.internet import protocol
12from twisted.pair import raw
13from zope.interface import implements
14
15class UDPHeader:
16    def __init__(self, data):
17
18        (self.source, self.dest, self.len, self.check) \
19                 = struct.unpack("!HHHH", data[:8])
20
21class RawUDPProtocol(protocol.AbstractDatagramProtocol):
22    implements(raw.IRawDatagramProtocol)
23    def __init__(self):
24        self.udpProtos = {}
25
26    def addProto(self, num, proto):
27        if not isinstance(proto, protocol.DatagramProtocol):
28            raise TypeError, 'Added protocol must be an instance of DatagramProtocol'
29        if num < 0:
30            raise TypeError, 'Added protocol must be positive or zero'
31        if num >= 2**16:
32            raise TypeError, 'Added protocol must fit in 16 bits'
33        if num not in self.udpProtos:
34            self.udpProtos[num] = []
35        self.udpProtos[num].append(proto)
36
37    def datagramReceived(self,
38                         data,
39                         partial,
40                         source,
41                         dest,
42                         protocol,
43                         version,
44                         ihl,
45                         tos,
46                         tot_len,
47                         fragment_id,
48                         fragment_offset,
49                         dont_fragment,
50                         more_fragments,
51                         ttl):
52        header = UDPHeader(data)
53        for proto in self.udpProtos.get(header.dest, ()):
54            proto.datagramReceived(data[8:],
55                                   (source, header.source))
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