SIP SIMPLE Client SDK » Python-msrplib

h1. Description 

This library implements Message Session Relay Protocol (MSRP).  MSRP is 

defined in RFC 4975. The relay extension that can be used for NAT traversal 

purposes is defined in RFC 4976.

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).

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.