<
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
>>
>>
