udp: Encode 0 checksums as 0xFFFF #883
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RFC768 states:
If the computed checksum is zero, it is transmitted as all ones (the
equivalent in one's complement arithmetic). An all zero transmitted
checksum value means that the transmitter generated no checksum.
Updated the serialization logic to correctly handle this. It isn't a big
problem for IPv4 where checksums are optional, but affects IPv6 which
has mandatory UDP checksums.
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@gconnell Sorry for tagging you, but is there a reason this PR hasn't been merged yet? Also the changes in this PR look all valid IMO. |
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Please merge this PR. |
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RFC768 states:
Updated the serialization logic to correctly handle this. It isn't a big
problem for IPv4 where checksums are optional, but affects IPv6 which
has mandatory UDP checksums.