Sofia-SIP is an open-source SIP User-Agent library, compliant with the IETF RFC3261 specification. It can be used as a building block for SIP client software for uses such as VoIP, IM, and many other real-time and person-to-person communication services. The primary target platform for Sofia-SIP is GNU/Linux. Sofia-SIP is based on a SIP stack developed at the Nokia Research Center. Sofia-SIP is licensed under the LGPL.
Sofia-SIP uses the GNU autotools, so building procedure is the usual:
sh> sh autogen.sh (if building from darcs) sh> ./configure sh> make sh> make install
See also 'docs/devel_platform_notes.txt' for notes on compiling Sofia-SIP in different environments.
See the "options-client-example" (available using darcs at http://sofia-sip.org/repos/options-client-example/ or with CVS as a module in Sofia-SIP CVS tree) for an example of a small app that is utilizing Sofia-SIP, and specifically the libsofia-sip-ua library component.
There are also multiple example clients under the "sofia-sip/utils" directory:
The Sofia-SIP su submodule also provides some small utilities:
Project website:
Mailing list:
Version control repositories:
Sofia-SIP is licensed under terms of the GNU LGPL. See the file "COPYING" for more information.