Javascript Session Establishment Protocol
draft-ietf-rtcweb-jsep-08

Network Working Group                                          J. Uberti
Internet-Draft                                                    Google
Intended status: Standards Track                             C. Jennings
Expires: April 30, 2015                                            Cisco
                                                        E. Rescorla, Ed.
                                                                 Mozilla
                                                        October 27, 2014

               Javascript Session Establishment Protocol
                       draft-ietf-rtcweb-jsep-08

Abstract

   This document describes the mechanisms for allowing a Javascript
   application to control the signaling plane of a multimedia session
   via the interface specified in the W3C RTCPeerConnection API, and
   discusses how this relates to existing signaling protocols.

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Uberti, et al.           Expires April 30, 2015                 [Page 1]
Internet-Draft                    JSEP                      October 2014

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  General Design of JSEP  . . . . . . . . . . . . . . . . .   3
     1.2.  Other Approaches Considered . . . . . . . . . . . . . . .   5
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Semantics and Syntax  . . . . . . . . . . . . . . . . . . . .   6
     3.1.  Signaling Model . . . . . . . . . . . . . . . . . . . . .   6
     3.2.  Session Descriptions and State Machine  . . . . . . . . .   6
     3.3.  Session Description Format  . . . . . . . . . . . . . . .  10
     3.4.  ICE . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
       3.4.1.  ICE Gathering Overview  . . . . . . . . . . . . . . .  10
       3.4.2.  ICE Candidate Trickling . . . . . . . . . . . . . . .  11
         3.4.2.1.  ICE Candidate Format  . . . . . . . . . . . . . .  11
       3.4.3.  ICE Candidate Policy  . . . . . . . . . . . . . . . .  12
       3.4.4.  ICE Candidate Pool  . . . . . . . . . . . . . . . . .  13
     3.5.  Interactions With Forking . . . . . . . . . . . . . . . .  13
       3.5.1.  Sequential Forking  . . . . . . . . . . . . . . . . .  14
       3.5.2.  Parallel Forking  . . . . . . . . . . . . . . . . . .  14
   4.  Interface . . . . . . . . . . . . . . . . . . . . . . . . . .  15
     4.1.  Methods . . . . . . . . . . . . . . . . . . . . . . . . .  15
       4.1.1.  Constructor . . . . . . . . . . . . . . . . . . . . .  15
       4.1.2.  createOffer . . . . . . . . . . . . . . . . . . . . .  17
       4.1.3.  createAnswer  . . . . . . . . . . . . . . . . . . . .  18
       4.1.4.  SessionDescriptionType  . . . . . . . . . . . . . . .  19
         4.1.4.1.  Use of Provisional Answers  . . . . . . . . . . .  20
         4.1.4.2.  Rollback  . . . . . . . . . . . . . . . . . . . .  20
       4.1.5.  setLocalDescription . . . . . . . . . . . . . . . . .  21
       4.1.6.  setRemoteDescription  . . . . . . . . . . . . . . . .  21
       4.1.7.  localDescription  . . . . . . . . . . . . . . . . . .  22
       4.1.8.  remoteDescription . . . . . . . . . . . . . . . . . .  22
       4.1.9.  canTrickle  . . . . . . . . . . . . . . . . . . . . .  22
       4.1.10. setConfiguration  . . . . . . . . . . . . . . . . . .  23
       4.1.11. addIceCandidate . . . . . . . . . . . . . . . . . . .  24
   5.  SDP Interaction Procedures  . . . . . . . . . . . . . . . . .  24