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j3hjghfyfzplwvshrr8cx9y
2005 Mar 11
1
QoS and VoIP
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Hi all,
I made some filters on tc to match the VoIP traffic based on RTP packet
RFC 1889.
The only patern I found was the rtp version and the payload type wich
identify the codec. The u32 rules are:
- - match ip protocol 0x11 0xff -> UDP
- - match u8 0x80 0xc0 at 28 -> RTP version 2 (two fists bits ''10'' of the
byte)
- -