[Serdev] [Tracker] Created: (SER-384) Add support for SDP RTCP Attribute in Nathelper module

[Anonymous (JIRA)]

Add support for SDP RTCP Attribute in Nathelper module
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                 Key: SER-384
                 URL: http://tracker.iptel.org/browse/SER-384
             Project: SER
          Issue Type: New Feature
          Components: NAT Traversal
    Affects Versions: Ipteldorf


the attached patch adds support for updating the RTCP
attribute in SDP, based on the info from rtpproxy.

The RTCP attribute is defined in RFC 3605, and is used
to signal explicit RTCP port to the peer. Currently the
SER nathelper module does not modify this attribute,
if the media goes via RTP-proxy. The patch adds support
for this, and will modify the SDP attribute to contain
port+1 from rtpproxy. 

The patch was written by Richard Aas <richard at db.org>

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