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software checksum calculation fails when using vlan tags without offloading #9
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The code assumes a hardcoded offset of 50/60 (IPv4/6) for the payload data which is wrong if there is a vlan tag that is not offloaded.
This is relevant for encapsulated packets.
Maybe we need a generic way to determine offsets within stacks?
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emmericp commentedon Oct 13, 2016
Related: calling tcp:calculateChecksum() on encapsulated inner packets is slightly inconvenient because it requires a pointer to the right offset in the outer packet.
emmericp commentedon Oct 21, 2016
is this fixed in the refactored stack?