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    SubjectRe: zero-copy TCP fileserving
    > Something like:
    > (1) A checksum of zero means don't check the checksum.
    > (2) You can't route a zero-checksum IP packet. If you route it,
    > you must checksum it before routing.

    LAN CRC's aren't sufficient. They protect card->card not host->host. And
    the world _does_ see host->host errors. Also IP checksums are cheap, even
    in silicon

    > This would allow LANs to operate at higher speeds where a hardware CRC
    > makes sure the data is good anyway, while maintaining compatibility

    It would make no difference. The cost nowdays is the cost per packet big time.
    Going to bigger packets is a huge win. The checksum helps but not that much.

    There are also people researching using FPGA's to do hardware assisted
    IP handling (eg hardware TCP demux)

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