GetSSRC Element Documentation

GetSSRC -- Click element; splits packets _possibly_ containing an SSRC field (used by the RTP protocol): this is copied it inside the packet annotation field

GetSSRC(OFFSET)

Ports: 1 input, 2 outputs
Processing: Push
Package: unibo_qos

GetSSRC has two output ports. All incoming packets _possibly_ having an SSRC field marked up are directed to output port 0, any remaining packets are emitted on output port 1 (since they cannot absolutely pertain to an RTP flow).

elementclass class_RTP {

   $ssrc, $dscp |
   get::GetSSRC($ssrc);
   rtp::RTPClassifier;
   set::SetIPDSCP($dscp);
   input->get[0]->rtp;
   get[1]->[1]output;
   rtp[0]->set->[0]output;
   rtp[1]->[1]output;
   }

In the above example, GetSSRC is used in combination with the RTPClassifier and SetIPDSCP elements to hook an RTP flow and mark its packets' DSCP field.

SSRC offset in bytes 1)

Offset (in bytes) of the SSRC field from the beginning of the Ethernet datagram (50 bytes). See also RFC 3550.

RTPClassifier, SetIPDSCP

Generated by 'click-elem2man' from 'package/getssrc.hh' on 19/May/2006.