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# $Id: igmp.py 23 2006-11-08 15:45:33Z dugsong $
# -*- coding: utf-8 -*-
"""Internet Group Management Protocol."""
import dpkt
class IGMP(dpkt.Packet):
__hdr__ = (
('type', 'B', 0),
('maxresp', 'B', 0),
('sum', 'H', 0),
('group', 'I', 0)
)
def __str__(self):
if not self.sum:
self.sum = dpkt.in_cksum(dpkt.Packet.__str__(self))
return dpkt.Packet.__str__(self)
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