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- """Internet Group Management Protocol."""
- from pypacker import pypacker, checksum
- class IGMP(pypacker.Packet):
- __hdr__ = (
- ("type", "B", 0),
- ("maxresp", "B", 0),
- ("sum", "H", 0),
- ("group", "I", 0)
- )
- def bin(self, update_auto_fields=True):
- if update_auto_fields and self._changed():
- self.sum = 0
- self.sum = checksum.in_cksum(pypacker.Packet.bin(self))
- return pypacker.Packet.bin(self, update_auto_fields=update_auto_fields)
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