Wireshark · Wireshark-users: Re: [Wireshark-users] Filtering HTTP Get Requests in reassambled PDUs

[Jaap Keuter <jaap.keuter@xxxxxxxxx>]

Hi,

That's bug 3315, which you may be able to work around by adding "or ip.flags.mf==1" to your filter _expression_ (if IP fragmentation is applicable).

Thanks,
Jaap

On Tue, 12 Oct 2010 15:38:31 +0200, "Gerd Windisch" <gerd.windisch@xxxxxxxxxxxxxxxxxxx> wrote:

Dear all,

 

I am trying to filter all GET-requests to a certain server out of a PCAP file. The display filter rule I use is “http.host contains servername”. This works fine as long as I am having the complete PCAP file. Then I save the filtered packets in a new PCAP file. When I in turn open this PCAP file, the GET-requests, which weren’t in a fragmented PDU, are shown correctly. However, the others (the fragmented GET-requests) are now displayed as  “Continuation or non-HTTP traffic”.  I found out that the dissection of the complete PCAP file makes use of packet data of neighboring packets, which are not saved in the output PCAP file.

The save procedure only saves the last packet of the fragmented PDU. Is there any solution to save all required packets in the resulting PCAP file, which allows for proper dissection later on?

Thanks in advance for your help

 

Regards

Gerd Windisch