Re: tcptrace-bugs Tcptrace and NS2 scripts (fwd)

From: Angelos Stavrou (
Date: 07/08/02

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    Date: Mon, 8 Jul 2002 18:48:30 -0400 (EDT)
    From: Angelos Stavrou <>
    Subject: Re: tcptrace-bugs Tcptrace and NS2 scripts (fwd)
    Message-ID: <>

    I am sending the patch for tcptrace to make it work with NS2 trace outputs
    for Single and Full tcp. I also send two scenario files for NS2 that will
    generate trace output that in combination with splitter script can be user
    with tcptrace to produce statistics and/or tcpdump output that can be used
    on other programs to analyse the behavior of the trace.

    Although there are a lot of configurations in NS2 I think the patch will
    work assuming that the person who sets the flags in NS2 sets the same
    flags in tcptrace (e.g. to use or not the tcp/ip headers).
    In NS2 this is done by the "Agent/TCP set useHeaders_ true" command and in
    tcptrace I introduced a new extended option that is called ns_hdrs (by
    default ON). Of course with --nons_hdrs it can be disabled for those that
    have NS2 traces without the headers.

    I will gladly explain any part of the C code or the NS2 traces that I
    am sending. The changes are done mainly in the ns.c module as you can see
    from the patch.


    Angelos Stavrou
    PhD Student,
    Comet Laboratory, EE Department,
    Columbia University,




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