tcpdump dumping limitation

tcpdump dumping limitation

Post by Sash » Sat, 29 Jul 2000 04:00:00

Hi all

I am using tcpdump to dump traffic of my computer,  I am using ( tcpdump
host sun ) but this
dump allot of options in my TCP header,  which I dont need, Like the one
here .

<nop,nop,timestamp 896030 896147>
<mss 1460,sackOK,timestamp 896032[|tcp]>

I am only interested to mss, I was wondering if some one knows, how to limit
the dumping options to only mss, instead of all these options (timestamp,
sackOK, nop, nop ).

Thank you very much

Any help will be appreciated   Sasha


tcpdump dumping limitation

Post by David Malo » Sat, 29 Jul 2000 04:00:00

><nop,nop,timestamp 896030 896147>
><mss 1460,sackOK,timestamp 896032[|tcp]>

Perl, sed or awk would probably be an option:

        tcpdump | perl -pne 's/\s<[^<]*(mss \d+)[^>]*>\s/ <$1> /'



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