WikiStart

Version 104 (Adrian Georgescu, 08/15/2008 03:49 pm)

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[[Image(htdocs:SIPUA-design-70.png, align=right, link=wiki:SIPUADesign)]]
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== Project description == 
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PyPjUA is Python software library for [http://pjsip.org PJSIP] C SIP stack that together with a clever middleware allows for easy development of SIP User agents with [wiki:RichPresence rich presence]  capability that run on desktop computers running Mac OS X, Linux and Windows operating systems, portable Internet devices like Nokia 810, Apple iPhone or Android mobile phones.
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As a library with a high-level API, the toolkit can also be used to add SIP and Presence functionality to network devices without a display (like TV set-up boxes), as long as Python environment is supported by such platform.
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== License == 
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The software is provided under the [source:LICENSE GPL LICENSE]
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== Deliverables ==
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The goal of this project is to deliver an Open Source development kit for a rich featured SIP User Agent while hiding the complex underlying functionality behind an easy to use high-level application programming interface. You may collapse the whole telecom industry into a simple ''Call me'' button or expand the presence buddy list to display the mood or blood pressure of your buddies (if they want to share this information with you).   
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Using this software you are able to create elegant real-time communications applications without having to read or understand [http://www.rfc3261.net the +1200 RFC documents] behind it. 
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''If you read them all some antidepressant and desintoxication is recommended after this effort.''
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== High level design ==
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PyPjUA is part of a [wiki:SIPUADesign greater design] design to provide a fully fledged SIP UA. 
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== Software repository ==
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Besides the Python software library itself, the repository contains the ready to use sip-simple-test-tools package that can be used to:
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  * Setup SIP [http://tools.ietf.org/html/rfc4975 MSRP sessions] between end-points with public IP or behind NAT by using [http://tools.ietf.org/html/rfc4976 MSRP relay]
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  * Setup up VoIP sessions between end-points with public IP adresses or behind NAT by using ICE and media relay
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  * [http://www.ietf.org/rfc/rfc3903.txt PUBLISH] and [http://www.ietf.org/rfc/rfc3265.txt SUBSCRIBE/NOTIFY] to SIP events like [http://www.ietf.org/rfc/rfc3856.txt presence], [http://www.ietf.org/internet-drafts/draft-ietf-simple-xcap-diff-09.txt xcap-diff], [http://www.ietf.org/rfc/rfc3857.txt watcher-info], conference, [http://www.ietf.org/rfc/rfc3842.txt message-summary]
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  * Manage presence policy the form of full or partial [http://www.tools.ietf.org/html/rfc4825 XCAP] documents like [http://www.tools.ietf.org/html/rfc5025 pres-rules], [http://www.tools.ietf.org/html/rfc4826 resource-lists, rls-services] and [http://www.tools.ietf.org/html/rfc4827 pidf-manipulation]
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  * Lookup of SIP buddies using [http://www.tech-invite.com/SIPWGs/01-WG-SIP/Idrafts/draft-lee-sip-dns-sd-uri-02.txt Bonjour] (LAN broadcast), [http://www.ietf.org/rfc/rfc3263.txt RFC 3263] (Locating SIP Services) and P2P overlays
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  * Setup up [http://www.tech-invite.com/SIPWGs/03-WG-SIMPLE/Drafts/draft-ietf-simple-chat-02.txt ad-hoc multi-party chat sessions] with an MSRP chat server (under construction)
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Using these scripts is easy to prototype [wiki:RichPresence Rich Presence], IM and VoIP services based on the SIP protocol. 
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To use these tools you can use your own infrastructure or register a free SIP SIMPLE account on [http://sip2sip.info http://SIP2SIP.info]
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== Download  == 
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The software library and command line tools will be available for download on 2008 Q4. 
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The software will be available from:
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[http://download.ag-projects.com/PyPjUA http://download.ag-projects.com/PyPjUA]
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== End-user experiences ==
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Using this toolkit you can develop in short time a skinable and cross-platform SIP User Agent that can be used for real-time Internet communications:
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  * VoIP calls using Internet codecs (Speex, iLBC) and G.711
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  * Multiple audio/msrp/video streams per session (for live broadcasting applications)
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  * Zero configuration when communication over LAN (Bonjour)
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  * Presence using SIP SIMPLE (PUBLISH, SUBSCRIBE, NOTIFY and XCAP policy)
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  * Interactive Messaging (IM) and File transfer using MSRP protocol
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  * Multiparty chat using MSRP chat server
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  * Support for NAT traversal using ICE for RTP media and MSRP Relay for IM
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  * Sharing desktop screen using VNC protocol
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  * Video calls
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The software is tested against the most popular SIP server software: [http://openser.org OpenSER], [http://openxcap.org OpenXCAP], [http://mediaproxy-ng.org MediaProxy] and [http://msrprelay.org MSRPRelay] servers. To test the software you can register a free SIP SIMPLE account on [http://SIP2SIP.info SIP2SIP]
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== Integration with third-party projects ==
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PyPjUA will be first integrated into [http://tribler.org Tribler]. Tribler is an application that enables its users to find, enjoy and share content. With content we mean video, audio, pictures, and much more. PyPjUA will provides real-time communications features that will allow users that have downloaded Tribler to:
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 * Interact in real time with each other using rich Presence, Interactive messaging and audio
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 * Communicate with other people that have access to SIP services from various SIP operators across the world
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== Developer program ==
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To become an active developer to this program please send your request by email to [mailto:pypjua-devel@ag-projects.com pypjua-devel@ag-projects.com]
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We are looking for developers that can contribute with the following features: VNC desktop sharing, implementation for video sessions and real time text sessions (real time text using RTP [
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[ http://www.ietf.org/rfc/rfc4103.txt ToIP (RFC 4103)] and MSRP).
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== Support == 
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The software is developed and supported by [http://ag-projects.com AG Projects].