[OpenSER-Devel] MSRP Relay release 0.9.1

[Adrian Georgescu]

Hello,

AG Projects launches MSRPRelay, an Open Source implementation of IETF  
standard RFC 4976. MSRP relay is an extension to the MSRP protocol  
(RFC 4975). Its main role is to help NAT traversal of Interactive  
Messaging and file transfer sessions for SIP/MSRP endpoints located  
behind NAT.


Background
-----------

A series of related instant messages between two or more parties can  
be viewed
as part of a "message session", that is, a conversational exchange of  
messages
with a definite beginning and end. This is in contrast to individual  
messages
each sent independently. Messaging schemes that track only individual  
messages
can be described as "page-mode" messaging, whereas messaging that is  
part of a
"session" with a definite start and end is called "session-mode"  
messaging.

Page-mode messaging is enabled in SIP via the SIP MESSAGE method, as  
defined in
RFC 3428. Session-mode messaging has a number of benefits over page-mode
messaging, however, such as explicit rendezvous, tighter integration  
with other
media-types, direct client-to-client operation, and brokered privacy  
and security.

Message Session Relay Protocol (MSRP) is a protocol for transmitting a  
series
of related instant messages in the context of a session. Message  
sessions are
treated like any other media stream when set up via a rendezvous or  
session
creation protocol such as the Session Initiation Protocol (SIP). MSRP  
Sessions
are defined in RFC 4975.


Out of the box, the software is designed to work in combinations with  
the
subscriber database used by OpenSER (see http://openser.org).

For more information visit

http://msrprelay.org

Regards,
Adrian