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    SubjectRE: Problem with Linux sockets not closing
    Well, I'll reserve judgement on whether SO_LINGER is working correctly
    or not until after I install the patch. Just one question. Where can I
    get a copy of pre-2.0.31?


    >-----Original Message-----
    >From: []
    >Sent: Thursday, May 08, 1997 2:24 PM
    >To: Jim Torelli
    >Subject: Re: Problem with Linux sockets not closing
    >Jim Torelli <> writes:
    >> The CloseSocket function sets SO_LINGER to abort the connection,
    >>calls shutdown(), then close(). I really don't think I'm doing anything
    >>wrong here.
    >There was a bug in earlier 2.0.x kernels that cause a shutdown() followed
    >by a close() to kill a socket immediately without finishing the
    >proper sequence of TCP shutdown events. I fixed this in 2.0.30, but
    >I had some brain slippage when writing the fix and missed a small case.
    >The result is that if you do a shutdown() then a close() in 2.0.30
    >you will get an extra FIN packet with a new sequence number, and
    >the observed problem with getting stuck in close(). I posted a patch
    >for this a couple of days ago which is present in the current pre-2.0.31
    >test patches. Please try the test patch and let me know if the problem
    >goes away.
    >As an aside a possible work around for the problem is to avoid doing
    >the shutdown() close() sequence, since the close() effectly does a
    >shutdown() anyway. Still, this should not be necessary and we should
    >fix the bug in the kernel.
    >BTW, I've had a vauge report that SO_LINGER does not work. Can you
    >tell me if it appears to be working correctly for you in the pre-2.0.31
    >Eric Schenk www:
    >Dept. of Comp. Sci., Lund University email:
    >Box 118, S-221 00 LUND, Sweden fax: +46-46 13 10 21 ph: +46-46 222 96 38

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