Hi Jeff,
You are right. Actually it was a plain user issue
Thanks a lot for your help.
Marc
-----Message d'origine-----
De : wireshark-dev-bounces@xxxxxxxxxxxxx [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] De la part de Jeff Morriss
Envoyé : lundi 2 mars 2009 17:28
À : Developer support list for Wireshark
Objet : Re: [Wireshark-dev] decoding depth & capture format
I think the problem is that the packets are encrypted:
> FCS: 0x3624af (incorrect, maybe due to ciphering, calculated
> 0xb5c834)
[...]
> .... .... .... ..1. = E bit: encrypted frame
The GPRS-LLC dissector does not hand the payload off to the next dissector when this is the case.
I suppose in your other (PCAP) captures the data is not encrypted and/or the checksums are correct.
Marc Lebas wrote:
> Hello Jeff,
>
> Enclosed is a small capture file (99 records, 27Kb).
> i can provide you with a bigger file if this excerpt does not contain IP frames.
>
> Marc
>
> -----Message d'origine-----
> De : wireshark-dev-bounces@xxxxxxxxxxxxx
> [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] De la part de Jeff
> Morriss Envoyé : vendredi 27 février 2009 15:53 À : Developer support
> list for Wireshark Objet : Re: [Wireshark-dev] decoding depth &
> capture format
>
>
>
> Marc Lebas wrote:
>> Hello,
>> Maybe its a User question but that could be a dev issue; anyway there
>> was no answer to my question on the User's mailing list.
>>
>> The issue : i got different depth in decoding (GPRS over FR),
>> depending on the capture file format :
>> With rf5, the analysis is limited to GPRS protocol layers, but never
>> decode IP which is the encapsulated protocol.
>> With libpcap, it is OK; Wireshark go deeper as it is able to decode
>> encapsulated IP frames in GPRS frames.
>> Why such a behaviour ? Did i missed something in my config ?
>> Here is my config on Linux (but the issue is the same on Windows) :
>> - preferences : fr.encap: GPRS Network Service
>> - cat k12_protos : "gprs_gb","fr"
>
> Not having ever looked at a GPRS capture in Wireshark, I don't know.
> (Small) sample captures would help.
___________________________________________________________________________
Sent via: Wireshark-dev mailing list <wireshark-dev@xxxxxxxxxxxxx>
Archives: http://www.wireshark.org/lists/wireshark-dev
Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev
mailto:wireshark-dev-request@xxxxxxxxxxxxx?subject=unsubscribe
