On Mon, Dec 15, 2008 at 12:18:26PM +0100,
Luigi De Donà <lu...@diacronic.org> wrote
a message of 240 lines which said:
> I need of some tips and tricks (other than RFC) to efficiently
> detect if a received UDP packet using a java datagram socket is a
> RTP packet or no ?
Read the RFC 3550) whose appendix A.1 is precisely dedicated to this
issue. Let's quote a small part:
Only weak validity checks are possible on an RTP data packet from a
source that has not been heard before:
o RTP version field must equal 2.
o The payload type must be known, and in particular it must not be
equal to SR or RR.
o If the P bit is set, then the last octet of the packet must
contain a valid octet count, in particular, less than the total
packet length minus the header size.
...
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