[SIPForum-discussion] Getting frame/ethernet header information from a UDP/RTP packet.

[Stephen James]

You will likely have to read a raw socket and not a UDP socket to get the UDP header and above. 

Sent from my iPhone

On Mar 17, 2013, at 10:49, vijay kant gupta <vijaykant.it2002 at gmail.com> wrote:

> Hi Badri,
> 
> Take dump and use tshark command to fetch details.
> tshark -r /home/ftpuser/capture1.cap -T fields -e frame.number -e
> frame.time  -e  ip.src -e ip.proto -E separator=, -E quote=d >
> /home/ftpuser/capture1csv.
> 
> Regard
> vijay
> 
> On Sat, Mar 16, 2013 at 9:21 AM, Khoa Pham <onmyway133 at gmail.com> wrote:
>> Use Wireshark
>> 
>> 
>> On Fri, Mar 15, 2013 at 9:29 PM, Badri Ranganathan <badri at arcatech.com>
>> wrote:
>>> 
>>> Hi all,
>>> 
>>> 
>>> 
>>> Does anyone know any system call to fetch Frame header from a RTP packet?
>>> 
>>> A RTP packet consists of the following headers –
>>> 
>>> Frame
>>> 
>>> Ethernet
>>> 
>>> IP
>>> 
>>> UDP
>>> 
>>> RTP
>>> 
>>> 
>>> 
>>> However, the frame/Ethernet/ip information are left behind by the kernel(
>>> I believe) and when I do a recvfrom, I can see only the RTP data. I wish to
>>> capture the ‘time’ from Frame header when the packet arrives.
>>> 
>>> 
>>> 
>>> Thanks,
>>> 
>>> Badri.
>>> 
>>> 
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>> 
>> 
>> 
>> --
>> Khoa Pham
>> HCMC University of Science
>> Faculty of Information Technology
>> 
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> 
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