MSRPRelay

[[Image(http://msrprelay.org/chrome/site/files/MSRP-Relay-Scenarios.png, align=right)]] 

== Description ==

This project implements in Python programming language:

MSRP relay, a stand alone server. Its main role is to help NAT traversal of instant messaging and file transfer sessions between SIP end-points located behind NAT. This extension is defined in [http://tools.ietf.org/html/rfc4976 RFC 4976].

MSRP client library, it can be used to create clients for instant messaging and file transfer based on [http://tools.ietf.org/html/rfc4975 RFC 4975] and [http://tools.ietf.org/html/rfc4976 RFC 4976]

MSRP chat server, a stand alone server, which allows multi-party IM/File transfer sessions using SIP protocol [http://tools.ietf.org/html/draft-ietf-simple-chat-03 draft-ietf-simple-chat-03] (under construction)

=== 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 [http://tools.ietf.org/html/rfc3428 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 [http://tools.ietf.org/html/rfc4975 RFC 4975].

== Features ==

 * Multiple domains support 

 * TLS encryption and digital certificates using GnuTLS library

 * Digest or basic HTTP authentication with support for multiple realms

 * Database passwords can be stored in an encrypted format

== Installation ==

 * [wiki:InstallationGuide Installation guide] - Installation guide

 * [wiki:TestBed Test bed] - How to test against a running platform 

 * [wiki:MSRPRelayScenarios MSRP Relay scenarios] - Use case scenarios of how MSRP relay functionality may be deployed in the field

 * [wiki:MSRPRelayDesign MSRP Relay design] - The internal logic of the MSRPRelay is described as a series of message flow diagrams

== Support == 

The project is supported via this wiki collaboration system by [http://ag-projects.com AG Projects]. To open  ticket please Register first. The ticketing support system is available only for registered users. The support is provided on a best-effort basis.

For commercial support see  [http://ag-projects.com Multimedia Service Platform] 

[[Image(http://nlnet.nl/image/logo.gif, align=right, nolink)]]

== Credits ==

 * Funding for MSRP relay and Chat server provided by [http://www.nlnet.nl NLNet foundation]

 * Authors: Ruud Klaver (MSRP Relay), Denis Bilenko (MSRP client and MSRP chat server)

 * Thanks to the IETF community for advise and support