Hi Kieth
Its a bit-wise AND not a logical AND. Since
all odd numbered frames will have the least significant
bit set and all even numbered frames will have it clear,
this will match only odd numbered frames.
Trevor Baker
Principal Software Engineer
Westell Limited
Ringway House, Bell Road,
Daneshill, Basingstoke,
RG24 8FB, United Kingdom
* Office: +44 (0)1256 843311
* [EMAIL PROTECTED]
* www.westell.co.uk
Gateways to Convergence
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Keith French
Sent: 13 December 2007 14:19
To: Community support list for Wireshark
Subject: Re: [Wireshark-users] Display Filter setting - Odd/Even packets
What does the use of the single ampersand (&) do in the last part of the
filter:-
frame.number & 1
I can't find this documented, only the && for AND?
----- Original Message -----
From: "Luis EG Ontanon" <[EMAIL PROTECTED]>
To: "Community support list for Wireshark" <[email protected]>
Sent: Tuesday, December 11, 2007 4:53 PM
Subject: Re: [Wireshark-users] Display Filter setting - Odd/Even packets
> "frame.number > 400 && frame.number < 500 && (!(frame.number & 1))"
>
> On Dec 11, 2007 5:48 PM, Shuky Limony <[EMAIL PROTECTED]> wrote:
>> Thanks.
>> And how can I do it for Even numbers? ( 402,404,406..)
>>
>>
>>
>>
>> On 12/11/07, Stig Bjørlykke <[EMAIL PROTECTED]> wrote:
>> > 2007/12/11, Shuky Limony <[EMAIL PROTECTED]>:
>> > > Is there a way to set a display filter for only odd packets number in
>> > > a
>> > > range?
>> > > e.g. between Packet 401 and 499 - result as packets
>> 401,403,405......499
>> >
>> > What about this?
>> >
>> > "frame.number > 400 && frame.number < 500 && frame.number & 1"
>> >
>> >
>> > --
>> > Stig Bjørlykke
>> > _______________________________________________
>> > Wireshark-users mailing list
>> > [email protected]
>> > http://www.wireshark.org/mailman/listinfo/wireshark-users
>> >
>>
>>
>> _______________________________________________
>> Wireshark-users mailing list
>> [email protected]
>> http://www.wireshark.org/mailman/listinfo/wireshark-users
>>
>>
>
>
>
> --
> This information is top security. When you have read it, destroy yourself.
> -- Marshall McLuhan
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