Re: /proc/net/tcp not updated fast enough?

From: Henrik Christian Grove (grove_at_fsr.ku.dk)
Date: 10/27/04

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    To: linux-kernel@vger.kernel.org
Date:	27 Oct 2004 16:14:35 +0200

    Herbert Xu <herbert@gondor.apana.org.au> writes:

    > Henrik Christian Grove <grove@fsr.ku.dk> wrote:
    >
    > > I have it running on 11[1] machines and since midnight (it's 11:47 here
    > > now) I have 2397 succesfull connections, but in 31 cases (that's 1,29%
    > > of the connections - and thus not totally ignorable) I had to read
    > > through /proc/net/tcp twice to find the uid. Does that sound plausible,
    > > or more like I'm doing something wrong?
    >
    > /proc/net/tcp in 2.4 is inherently unreliable since it doesn't use
    > the seqfile interface. Your best bet is to use the tcp_diag interface
    > instead. You can either do that by using the ss command from the
    > iproute2 suite, or you can query tcp_diag directly from C through
    > netlink.

    Thank you for the quick reply. Would you (or anyone else reading this)
    happen to have any hints on what to do in Perl? (I know I can call ss,
    but maybe there's a module with a nice interface?)

    .Henrik 

    -- 
"Det er fundamentalt noget humanistisk vås, at der er noget, 
 der hedder blød matematik."
   --- citat Henrik Jeppesen, dekan for det naturvidenskabelige fakultet
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