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On Wed, 19 Jan 2000 19:00:49 -0800, jordi ros wrote: > I need to parse the packets received and sent when using an audio > application such as RealPlayer G2. For that, I'm going to introduce some > code in the networking IP stack of the Linux kernel. I have several > basic questions: You don't have to change the Linux IP stack for that: RTSP and RTP are just protocols that run on top of any IP stack, no need for changes. > (1) Is RealPlayer using any kind of RTP or RTSP protocol at the > application layer? RealPlayer G2 is able to use RTSP/RTP. > (2) What's the relationship between RTP and RTSP? AFAIK, RTSP is the control protocol, and RTP is used to transport the data. > (3) Can somebody give me the stack picture for this scenario? (maybe > something like: ETHERNET / IP / UDP / RTSP?) ethernet/IP/TCP/RTSP. (of course, you can use any other physical layer instead of ethernet). > (4) How can I parse the application level payload? Is it text based the > same way HTTP is? Yes, it is text based. RTSP is being standardized by the IETF (RFC 2326). IETF is an open standards body, so all documentation is available. Have a look at http://www.ietf.org/ . You can search for RFCs at http://www.rfc-editor.org/rfcsearch.html . Erik PS: I'm not an expert in RTSP/RTP, but a coworker is working on a server implementation, so I know some of the terminology. -- J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department of Electrical Engineering, Faculty of Information Technology and Systems, Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands Phone: +31-15-2785859 Fax: +31-15-2781843 Email J.A.K.Mouw@its.tudelft.nl WWW: http://www-ict.its.tudelft.nl/~erik/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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