Re: Portable way to close() and prevent RST with non-empty receive queue?

From: Daniel C. Bastos (dbast0s_at_yahoo.com.br)
Date: 11/21/05

  • Next message: Omega: "problem with recvfrom" 
    Date: Mon, 21 Nov 2005 18:23:46 +0000 (UTC)

    In article <dls8lk$gm3$1@chessie.cirr.com>,
    Andrei Voropaev wrote:

    > On 2005-11-17, Thomas Kho <thomaskho@gmail.com> wrote:
    > [...]
    >> Background:
    >> I'm implementing a HTTP monitoring server that responds to all requests
    >> with the same reply, and in the process doesn't bother to read the
    >> request. On Linux 2.6.14 without the shutdown(), the client gets a RST
    >> instead of the connection properly closing.
    >
    > Nothing will help. If you close connection without reading the input
    > stream, and the client doesn't check for EOF(FIN) before trying to write
    > (or has put already lots of data in the out-buffer) then the client will
    > receive RST. Shutdown is really of no help here. That's just a way to
    > signal to remote side that you are done with writing and it may start
    > sending, or to signal kernel that you don't want to read from the socket
    > anymore. RST is sent by the kernel when it receives data for the socket
    > that doesn't do reading anymore or is closed. So, if you don't read, RST
    > will be sent when client attempts to send something.

    As far as I am able to verify, only by closing the socket an RST will
    be sent if more data arrives. So, the ``doesn't do reading anymore''
    case doesn't seem to be true. If it is, how do you do it? My tests
    were made only on FreeBSD.

  • Next message: Omega: "problem with recvfrom"

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