Re: Help on MAC-LTE Decoder

[Martin Mathieson <martin.r.mathieson () googlemail com>]

I see in your file that the PDUs logged don't have the "mac-lte" prefix.

You redefined MAC_LTE_START_STRING to be "" in the logger program...  Isn't
it supposed to #include "packet-mac-lte.h"?
The definitions used in that program need to match wireshark, otherwise the
header inside the UDP frame won't be dissected correctly...

Martin

On Tue, Jun 29, 2010 at 2:44 PM, Madhur Raj N <madhurrajn () gmail com> wrote:

> Attach mac-lte-logger.c. Missed in last email.
>
>
> On 29 June 2010 19:08, Madhur Raj N <madhurrajn () gmail com> wrote:
>
> > Hi Martin,
> >
> >         Thanks for the quick response. I have enabled heuristic MAC-LTE
> > over UDP framing, as you have already mentioned in one of the previous list
> > emails. under edit->preference->protocol->mac-lte.  I am hereby attaching
> > the pcap file, which I am trying to decode. Please let me know, if anything
> > is missing.
> >
> > I am using wireshark version 1.3.5.
> >
> > Regards,
> > Madhur
> >
> >
> > On 29 June 2010 18:46, Martin Mathieson <
> > martin.r.mathieson () googlemail com> wrote:
> >
> > > On Tue, Jun 29, 2010 at 1:57 PM, Madhur Raj N <madhurrajn () gmail com>wrote:
> > >
> > > > Hi,
> > > >
> > > >       I am trying to use  MAC-LTE packet dissector on the eNodeB side.
> > > > Currently I am finding difficulty in using it. I have gone through many of
> > > > your support site but things are not looking good at my side.
> > > >
> > > > This is what I have tried.
> > > > 1. I do not have any catapult DCT2000. Hence I can not capture files in
> > > > .out format.
> > > > 2. I am using UDP packets to carry MAC-LTE frames.
> > >
> > > OK, did you check the MAC-LTE protocol preference 'Try Heuristic MAC-LTE
> > > over UDP framing"?
> > >
> > >
> > > > 3. As I can not decode the packets, I have added handler to get the
> > > > option for " Decode As" inside proto_reg_handoff_mac_lte() function. With
> > > > this I am able to find the "Decode As" option for MAC-LTE. But whence i try
> > > > to decode, I am thrownwith following error:
> > > >         "Can't dissect LTE MAC frame because no per-frame info was
> > > > attached!"
> > > The heuristic dissector parses the header, populates a struct with the
> > > given info and attaches it to the frame (for mac-lte).
> > > If the heuristic dissector didn't match the frame, p_get_proto_data won't
> > > contain a filled-in struct.
> > >
> > >
> > > > Can you please help me, as why "p_get_proto_data" is throwing error.
> > > > 4. Currently to bring up the setup, I am using the sample program
> > > > "mac_lte_logger.c" file given at wireshark site to generate the packets.
> > > >
> > > > Can you please also let me know any list where I can paste, it might be
> > > > helpful for others too.
> > >
> > > If you've tried the preference setting I mentioned above and its still
> > > not working, could you send me the captured file and I'll see what is going
> > > wrong with it?
> > >
> > > Regards,
> > > Martin
> > >
> > >
> > > > Regards,
> > > > Madhur
> > > >
> > > >
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