Re: RTP packet dissection in C#

[Robert Clove <cloverobert () gmail com>]

i didnt know things so thought to ask as you all are much experienced and
knowledgeable

On Fri, Nov 17, 2017 at 9:32 PM, Richard Sharpe <realrichardsharpe () gmail com
> wrote:

> On Fri, Nov 17, 2017 at 7:40 AM, Robert Clove <cloverobert () gmail com>
> wrote:
> > Hey,
> >
> > Really thanks for the link.
> > If you can help me with the following.
> > I have code that dissect the RTP packet in C#(as follows), but i don't
> get
> > the events here, if you can help me writing the code here
>
> Are you asking for help with your homework?
>
> > private void Rtsp_client_DataReceived(object sender,
> Rtsp.RtspChunkEventArgs
> > e)
> >       {
> >           // RTP Packet Header
> >           // 0 - Version, P, X, CC, M, PT and Sequence Number
> >           //32 - Timestamp
> >           //64 - SSRC
> >           //96 - CSRCs (optional)
> >           //nn - Extension ID and Length
> >           //nn - Extension header
> >
> >           int rtp_version =      (e.Message.Data[0] >> 6);
> >           int rtp_padding =      (e.Message.Data[0] >> 5) & 0x01;
> >           int rtp_extension =    (e.Message.Data[0] >> 4) & 0x01;
> >           int rtp_csrc_count =   (e.Message.Data[0] >> 0) & 0x0F;
> >           int rtp_marker =       (e.Message.Data[1] >> 7) & 0x01;
> >           int rtp_payload_type = (e.Message.Data[1] >> 0) & 0x7F;
> >           uint rtp_sequence_number = ((uint)e.Message.Data[2] << 8) +
> > (uint)(e.Message.Data[3]);
> >           uint rtp_timestamp = ((uint)e.Message.Data[4] <<24) +
> > (uint)(e.Message.Data[5] << 16) + (uint)(e.Message.Data[6] << 8) +
> > (uint)(e.Message.Data[7]);
> >           uint rtp_ssrc =      ((uint)e.Message.Data[8] << 24) +
> > (uint)(e.Message.Data[9] << 16) + (uint)(e.Message.Data[10] << 8) +
> > (uint)(e.Message.Data[11]);
> >
> >           int rtp_payload_start = 4 // V,P,M,SEQ
> >                               + 4 // time stamp
> >                               + 4 // ssrc
> >                               + (4 * rtp_csrc_count); // zero or more
> csrcs
> >           uint rtp_extension_id = 0;
> >           uint rtp_extension_size = 0;
> >           if (rtp_extension == 1)
> >           {
> >               rtp_extension_id = ((uint)e.Message.Data[rtp_payload_start
> +
> > 0] << 8) + (uint)(e.Message.Data[rtp_payload_start + 1] << 0);
> >               rtp_extension_size = ((uint)e.Message.Data[rtp_payload_start
> +
> > 2] << 8) + (uint)(e.Message.Data[rtp_payload_start + 3] << 0);
> >               rtp_payload_start += 4 + (int)rtp_extension_size;  //
> > extension header and extension payload
> >           }
> > }
> >
> >
> >
> > On Fri, Nov 17, 2017 at 8:33 PM, Jaap Keuter <jaap.keuter () xs4all nl>
> wrote:
> > > Hi,
> > >
> > > We don’t have one, or at least non written in C#. If you would be
> > > interested in the C code of the RTP event dissector, that would be:
> > >
> > > https://code.wireshark.org/review/gitweb?p=wireshark.git;
> a=blob;f=epan/dissectors/packet-rtp-events.c;hb=HEAD
> > > Thanks,
> > > Jaap
> > >
> > >
> > > On 17 Nov 2017, at 15:34, Robert Clove <cloverobert () gmail com> wrote:
> > >
> > > Hi,
> > >
> > > Can anyone point me to the library written in C# which dissect the RTP
> > > packet.
> > > I am mainly interested in the DTMF events.
> > >
> > > --Clove
> > >
> > > ____________________________________________________________
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>
> --
> Regards,
> Richard Sharpe
> (何以解憂？唯有杜康。--曹操)
> ____________________________________________________________
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