24 lines
599 B
Python
24 lines
599 B
Python
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#!/usr/bin/env python3
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# Code copied from /usr/lib/python3/dist-packages/scapy/utils.py
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if struct.pack("H",1) == b"\x00\x01": # big endian
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def checksum(pkt):
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if len(pkt) % 2 == 1:
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pkt += b"\0"
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s = sum(array.array("H", pkt))
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s = (s >> 16) + (s & 0xffff)
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s += s >> 16
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s = ~s
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return s & 0xffff
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else:
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def checksum(pkt):
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if len(pkt) % 2 == 1:
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pkt += b"\0"
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s = sum(array.array("H", pkt))
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s = (s >> 16) + (s & 0xffff)
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s += s >> 16
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s = ~s
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return (((s>>8)&0xff)|s<<8) & 0xffff
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