SIP/XMPP Gateway¶

The goal of this task is to implement a bidirectional signaling and media gateway for Presence, Instant Messaging, Multiparty IM, Audio, and File Transfer for SIP and XMPP signaling protocols, RTP and MSRP media planes.

This research and development is part of the WormHole Project sponsored by NLNet and AG Projects.

Deployment Scenario¶

By pointing the correspondent DNS records for SIP or XMPP services of a given Internet domain to the address of this gateway, any packet sent to or connection established to the gateway by one of the protocols is transparently translated into the other. The server is designed in such way that it requires zero-configuration (except of course for the DNS domains configuration).

Specifications and Standards¶

SIP Signaling and Media¶

• SIP (RFC3261) and related RFCs for DNS, SDP, ICE, RTP (too many to mention)
• MSRP Protocol http://tools.ietf.org/html/rfc4975
• MSRP Relay extension http://tools.ietf.org/html/rfc4976
• MSRP Alternative Connection Model (ACM) //tools.ietf.org/html/rfc6135
• Multi-party Chat Using MSRP http://tools.ietf.org/html/draft-ietf-simple-chat-14

XMPP Signaling and Media¶

• XMPP core (RFC 6120) http://xmpp.org/rfcs/rfc6120.html
• XMPP extensions http://xmpp.org/xmpp-protocols/xmpp-extensions
• Instant Messaging and Presence http://xmpp.org/rfcs/rfc6121.html
• Multi-User Chat http://xmpp.org/extensions/xep-0045.html
• File Transfers http://xmpp.org/extensions/xep-0096.html
• Audio and Video Jingle http://xmpp.org/extensions/xep-0166.html
• Audio and Video Jingle RTP http://xmpp.org/extensions/xep-0167.html
• Audio and Video Jingle ICE (UDP) http://xmpp.org/extensions/xep-0176.html
• Delivering Conference Information to Jingle Participants http://xmpp.org/extensions/xep-0298.html

Protocol Translation Specifications¶

• XMPP - SIP Core Interworking
• XMPP - SIP Presence
• XMPP - SIP Message
• XMPP - MSRP Chat
• XMPP - MSRP Group Chat

Lessons learned during implementation and Suggestions for improvement of Protocol Translation Specifications

Progress¶

Completed items are operational on SIP2SIP which supports Chat and Presence to gmail.com an jabber.org domains. Progress announcements are made on SIP beyond VoIP mailing list

Completed Items¶

• Software Library Analysis
• Gateway Design
• SIP-XMPP Chat
• SIP-XMPP Presence
• SIP-XMPP Multiparty Chat

Roadmap¶

• SIP-XMPP Jingle Audio
• SIP-XMPP File Transfer