SIP SIMPLE Client SDK

[[Image(htdocs:SIPUA-design-70.png, align=right, link=wiki:SIPUADesign)]]

Project description

Python Sip Client is software library built on top of PJSIP that together with an elegant middleware allows for easy development of real-time communications Internet end-points based on [http://tools.ietf.org/html/rfc3261 SIP protocol] with rich Presence, Interactive Messaging (IM) and File Transfer capabilities.

Deliverables

The goal of this project is to deliver the best Open Source development kit for rich featured SIP User Agents, while hiding the complex underlying functionality behind an easy to use high-level application programming
interface. Compared to other available SIP libraries, this project provides session based Interactive Messaging (IM) using MSRP protocol, multiple streams support, 'the missing' SIP-SIMPLE features for rich presence (presence rules, resource lists, RLS services, rich PIDF and XCAP policy).

The software library is tested against the most popular SIP server software available today: [http://opensips.org OpenSER], [http://asterisk.org Asterisk], [http://openxcap.org OpenXCAP], [http://msrprelay.org MSRPRelay] and [http://mediaproxy-ng.org MediaProxy].

INSTALL procedure

The software has been tested on Linux Debian and MacOSX 10.5 (Leopard).

For people running Debian testing or unstable on an i386 architecture there is an official public repository provided by AG Projects. Install the AG Projects debian software signing key:

{{{
wget http://download.ag-projects.com/agp-debian-gpg.key
apt-key add agp-debian-gpg.key
}}}

Add the following lines to /etc/apt/sources.list

{{{

1. AG Projects software
   deb http://ag-projects.com/debian unstable main
   deb-src http://ag-projects.com/debian unstable main
   }}}

Update the list of available software and install the software:

{{{
apt-get update
apt-get install sipclient
}}}

For other distributions or to obtain the source code go to:

[http://download.ag-projects.com/SipClient/ http://download.ag-projects.com/SipClient/]

To obtain access to the version controlled software repository:

darcs get http://devel.ag-projects.com/repositories/pypjua

End-user experiences

The software allows you to create elegant real-time communications applications without having to read [http://www.rfc3261.net the +1200 RFC documents] behind it.

''If you read them all, some antidepressant and desintoxication is recommended after this effort.''

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. 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). Some of the things possible with this library are listed here:

• VoIP calls using Internet codecs (wide-band Speex, iLBC) and G.711
• Zero configuration server-less communication over LAN (Bonjour)
• Parallel forking to multiple SIP devices
• Presence using SIP SIMPLE (PUBLISH, SUBSCRIBE, NOTIFY and XCAP policy)
• Interactive Messaging (IM) and File transfer using MSRP protocol
• Desktop sharing
• Video calls

Testing the library

Besides the Python software library itself, the repository contains ready to use fully featured [wiki:testscripts command-line examples scripts] that can be used to:

• Register SIP end-points
• Setup up VoIP sessions
• Setup Interactive Messaging (IM) and file-transfer ([http://tools.ietf.org/html/rfc4975 MSRP sessions]) with or without support from a [http://tools.ietf.org/html/rfc4976 MSRP relay]
• Simulate SIP SIMPLE end-points: [http://tools.ietf.org/html/rfc3903 PUBLISH], SUBSCRIBE, NOTIFY for [http://tools.ietf.org/html/rfc3265 SIP events], presence data model and format ([http://tools.ietf.org/html/rfc3856 RFC3856], [http://tools.ietf.org/html/rfc3863 RFC3863 ], [http://tools.ietf.org/html/rfc4479 RFC4479]), [http://www.ietf.org/internet-drafts/draft-ietf-simple-xcap-diff-09.txt xcap-diff], watcher-info ([http://tools.ietf.org/html/rfc3857 RFC3857],[http://tools.ietf.org/html/rfc3858 RFC3858] ), [http://tools.ietf.org/html/rfc4575 conference], [http://tools.ietf.org/html/rfc3842 message-summary]
• Manage [http://www.tools.ietf.org/html/rfc4825 XCAP] documents [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]
• 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://tools.ietf.org/html/rfc3263 RFC 3263] (Locating SIP Services)
• Setup up [http://tools.ietf.org/html/draft-ietf-simple-chat-02 ad-hoc multi-party chat sessions] with an MSRP chat server (under construction)

For testing, you can use your own infrastructure or register a free SIP SIMPLE account on [http://sip2sip.info http://SIP2SIP.info]

License

The software is provided under the [source:LICENSE GPL LICENSE]

Contributing

We are looking for contributions related to DHT overlay (P2PSIP), desktop sharing, video sessions and real time text using RTP [http://www.ietf.org/rfc/rfc4103.txt ToIP (RFC 4103)].

If you wish to become an active developer of this project, send your request by email to [mailto:pypjua-devel@ag-projects.com pypjua-devel@ag-projects.com].