oSIP Library is a C library for implementing SIP support.
http://www.gnu.org/software/osip/
http://savannah.gnu.org/projects/osip/
From their website:
This is the oSIP library. It has been designed to provide the Internet Community a simple way to support the Session Initiation Protocol. SIP is described in the RFC3261 which is available at http://www.ietf.org/rfc/rfc3261.txt.
This library is used by:
See Also:
- eXosip – eXtended osip library
- Open Source VOIP Software