Wireshark · Wireshark-users: Re: [Wireshark-users] Display Filter setting - Odd/Even packets

["Trevor Baker" <trevor.baker@xxxxxxxxxxxxx>]

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 
* trevor.baker@xxxxxxxxxxxxx 
* www.westell.co.uk 

Gateways to Convergence 


-----Original Message-----
From: wireshark-users-bounces@xxxxxxxxxxxxx [mailto:wireshark-users-bounces@xxxxxxxxxxxxx] 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" <luis.ontanon@xxxxxxxxx>
To: "Community support list for Wireshark" <wireshark-users@xxxxxxxxxxxxx>
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 <shukyli@xxxxxxxxx> wrote:
>> Thanks.
>> And how can I do it for Even numbers? ( 402,404,406..)
>>
>>
>>
>>
>> On 12/11/07, Stig Bjørlykke <stig@xxxxxxxxxxxxx> wrote:
>> > 2007/12/11, Shuky Limony <shukyli@xxxxxxxxx>:
>> > > 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
>> > Wireshark-users@xxxxxxxxxxxxx
>> > http://www.wireshark.org/mailman/listinfo/wireshark-users
>> >
>>
>>
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>
>
>
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