Wireshark-users: Re: [Wireshark-users] Display filter
From: Gerald Combs <gerald@xxxxxxxxxxxxx>
Date: Wed, 02 May 2007 12:09:04 -0700
The Windows version ships with PCRE.  Did you try typing in the filter,
and does it turn green?

Irakli Natshvlishvili wrote:
> Yaah, I dug into docs and found that regex could be used in display filters.
> 
> Unfortunately, windows installer for Wireshark does not have PCRE
> support. Am I right?
> 
> Do I understand correctly, that I need re-compile wireshark from the
> source under windows to have regex support?
> 
> If yes, than, well, sorry, I can't do it...
> 
> --i.n.
> 
> On 5/2/07, *Gerald Combs* <gerald@xxxxxxxxxxxxx
> <mailto:gerald@xxxxxxxxxxxxx>> wrote:
> 
>     Irakli Natshvlishvili wrote:
>     > Question:
>     >
>     > Using display filters is there a way to find if a particular string
>     > occurs more then once in a packet?
>     >
>     > For example, if there is an UDP packet which has payload "this is one
>     > 1234 two one test", then filtering via UDP contains "one" will
>     display
>     > this UDP packet.
>     >
>     > But I want to filter ALL packets, where this particular string occurs
>     > more then once.
>     >
>     > Any way do do it?
> 
>     If you have PCRE support compiled in, you can use something like
> 
>         udp matches "one.*one"
> 
>     That translates to "the string 'one' followed by zero or more characters
>     followed by the string 'one'."  The "matches" operator supports
>     Perl-compatible regular expressions, which are described at
>     http://perldoc.perl.org/perlre.html .
> 
>     You can check for PCRE support via "Help->About Wireshark" or by using
>     the "-v" command-line flag.  You can also type in the filter above and
>     see if the display filter entry turns green.
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> 
> 
> 
> -- 
> I.N .
> 
> 
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