Re: gzip and tcpdump...

[Guy Harris <guy () netapp com>]

On Tue, Feb 25, 2003 at 03:12:30PM -0500, Matt Bing wrote:
> rmkml said:
> > Why gzip is not included in tcpdump ?
>
> gzcat works like a charm:
>
> $ gzcat mypcap.gz | tcpdump -nr -
> 16:00:30.403793 10.2.2.240.21 > 172.16.2.130.33560: . ack 1238 win 31740 <nop,nop,timestamp 285487358 52170951> (DF) 
> [tos 0x10]

...but not on output:

        tcpdump -w - | gzcat

        hostname$ tcpdump -w - | gzcat
        tcpdump: listening on XXX

        gzcat: stdin: not in gzip format

I don't know whether the person asking the question wanted to have
tcpdump capable of *reading* gzipped files (in which case gzcat piped to
tcpdump works just fine) or have it capable of *writing* gzipped files.
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