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# $Id: ipx.py 23 2006-11-08 15:45:33Z dugsong $
# -*- coding: utf-8 -*-
"""Internetwork Packet Exchange."""
from __future__ import absolute_import
from . import dpkt
IPX_HDR_LEN = 30
class IPX(dpkt.Packet):
"""Internetwork Packet Exchange.
Internetwork Packet Exchange (IPX) is the network layer protocol in the IPX/SPX protocol suite.
IPX is derived from Xerox Network Systems' IDP. It also has the ability to act as a transport layer protocol.
Attributes:
__hdr__: Header fields of IPX.
sum: (int): Checksum (2 bytes).
len: (int): Packet Length (including the IPX header / 2 bytes).
tc: (int): Transport Control (hop count / 1 byte).
pt: (int): Packet Type (1 byte).
dst: (bytes): Destination address (12 bytes).
src: (bytes): Source address (12 bytes).
"""
__hdr__ = (
('sum', 'H', 0xffff),
('len', 'H', IPX_HDR_LEN),
('tc', 'B', 0),
('pt', 'B', 0),
('dst', '12s', b''),
('src', '12s', b'')
)
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