Wireshark-dev: Re: [Wireshark-dev] Dump required for multiplexed streams

From: Jaap Keuter <jaap.keuter@xxxxxxxxx>
Date: Tue, 03 Nov 2009 17:17:45 +0100
Hi,

Thanks for the pointer.

Thanx,
Jaap

On Tue, 3 Nov 2009 15:54:15 +0100, "Anders Broman"
<anders.broman@xxxxxxxxxxxx> wrote:
> Hi,
> I think he refers to
> http://anonsvn.wireshark.org/viewvc/viewvc.cgi?view=rev&revision=29602
> packet-nb_rtpmux.c
> Anders 
> 
> -----Original Message-----
> From: wireshark-dev-bounces@xxxxxxxxxxxxx
> [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On Behalf Of Jaap Keuter
> Sent: den 3 november 2009 15:50
> To: Developer support list for Wireshark
> Subject: Re: [Wireshark-dev] Dump required for multiplexed streams
> 
> Hi,
> 
> I'm not aware of multiplexed RTP streams being dissected by Wireshark.
> What RFC's are you referring to in the text below ?
> 
> Thanx,
> Jaap
> 
> On Tue, 3 Nov 2009 17:19:51 +0530, shruti singh
> <shruti.is.singh@xxxxxxxxx>
> wrote:
>> Hey
>> 
>> I have taken the wireshark dev image to decode multiplexed streams.Can
> you
>> provide me any dump for multiplexed streams which I can decode in
> wireshark
>> 
>> Thanks & Regards
>> Shruti
>> 
>> On Wed, Aug 26, 2009 at 11:06 AM, shruti singh
>> <shruti.is.singh@xxxxxxxxx>wrote:
>> 
>>> Hi
>>>
>>> I need to decode RTP Multiplex streams using wireshark. Presently we
> can
>>> decode only Non -Multiplexed RTP streams in wireshark.
>>>
>>> A multiplexed voice packet is composed by concatenating RTP
> encapsulated
>>> voice packets and IP and UDP headers.
>>>
>>>  Below is the Multiplex Packet format
>>>
>>>
>>>
>>> IP
>>>
>>> UDP
>>>
>>> Multiplex Header
>>>
>>> Compressed RTP Header
>>>
>>> RTP Payload
>>>
>>> Multiplex Header
>>>
>>> Compressed RTP Header
>>>
>>> RTP Payload
>>>
>>>
>>>
>>> This Multiplex header is repeated in beginning of each RTP packet. So
> 
>>> I was thinking of way to extract this multiplex header & use it to 
>>> decode
> each
>>> RTP
>>> packet following this Multiplex header.
>>>
>>> I supose we need to make a dissector packet-rtpmultiplex.c regestring
> to
>>> a
>>> UDP port as a starting point.
>>>
>>> Dissect the multiplex header, decompress the rtp header and have the
> RTP
>>> dissector dissecting
>>> the resulting "RTP packet" - decompressed header+data.
>>>
>>> Could you help me in dissecting the multiplex header and make this
> work.
>>>
>>>
>>> Also I need to know the steps to write our own filters in wireshark
>>>
>>>
>>> It would be great help. Kindly reply as soon as possible
>>>
>>>
>>> Regards
>>>
>>> Shruti
>>>
>>>
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