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    SubjectRe: UDP bugs
    On Sun, Dec 13, 1998 at 02:38:57PM +0100, David S. Miller wrote:
    > From: Andi Kleen <ak@muc.de>
    > Date: Sun, 13 Dec 1998 14:32:23 +0100
    >
    > You wrote:
    > >Sounds like you found a bug in Solaris, not in Linux...
    >
    > If the limit of 65507 Richard quoted is right then there is a off-by-one
    > bug somewhere - the limit should be 65508 for UDP (65536 - 20 bytes ip header
    > - 8 bytes UDP header) and 65516 for RAW sockets (and 65536 when IP_HDRINCL
    > is set). If the input limit is smaller this is a bug too.
    >
    > Right, my current theory is that we get into trouble somewhere where
    > we align some header object and add the alignment residue into the
    > total length, get confused, and toss the packet because we think it is
    > too big. Or it's a simple ">=" vs. ">" test off by one bug.

    When I remember right Alexey's last big patch had some related changes
    in ip_build_xmit.


    -Andi

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