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"""
What : Internet Group Management Protocol, Version 2
How : http://www.ietf.org/rfc/rfc2236.txt
Who : jesse @ housejunkie . ca
"""
from construct import Byte, Enum,Struct, UBInt16
from construct.protocols.layer3.ipv4 import IpAddress
from binascii import unhexlify
import six
igmp_type = Enum(Byte("igmp_type"),
MEMBERSHIP_QUERY = 0x11,
MEMBERSHIP_REPORT_V1 = 0x12,
MEMBERSHIP_REPORT_V2 = 0x16,
LEAVE_GROUP = 0x17,
)
igmpv2_header = Struct("igmpv2_header",
igmp_type,
Byte("max_resp_time"),
UBInt16("checksum"),
IpAddress("group_address"),
)
if __name__ == '__main__':
capture = unhexlify(six.b("1600FA01EFFFFFFD"))
print (igmpv2_header.parse(capture))
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