Wireshark · Wireshark-users: Re: [Wireshark-users] How to edit a specific byte in a pcap file ?

["j.snelders" <j.snelders@xxxxxxxxxx>]

Hi Shashank,

You can use HxD; a freeware hex and disk editor.

You can download it here:
http://mh-nexus.de/en/hxd/

Best regards
Joan

On Fri, 26 Feb 2010 19:24:09 +0100 Jaap Keuter wrote:
>Hi,
>
>Sounds you could use a true hex editor. You'll have to target the byte by
>hand, 
>but you seem to know what you're looking for.
>
>Thanks,
>Jaap
>
>Shashank Agarwal wrote:
>> Hi,
>> How can I modify a specific byte using WireShark or any of its tools.
I
>
>> tried bit-twiste, tcprewrite, tcpreplay-edit, but to no avail. These 
>> tools provide predefined and limited editing capability like editing the
>
>> IP address or TCP port or changing timestamp etc.
>> E.g. I have the hex bytes from an ethernet broadcast packet -
>> ff  ff  ff  ff  ff  ff  00  0b  20  40  15  6d  19  02  40 ......
>> First six bytes is dest. address, next 6 bytes is source address, "19

>> 02" is packet type and the 15th byte (0x40) contains a flag. I want to
>
>> turn on the second bit in this 15th byte. Essentially replacing 0x40 
>> with 0x42.
>> Which tool can help me with this modification in the pcap file?
>>  
>> Thanks