development files for the SIP library

 libosip2 header files and static libraries
 to assist in development of programs wishing to use SIP.
 .
 The oSIP library is written in C, is thread safe
 and has no dependencies except the standard C library.
 .
 oSIP could be used to implement an IP soft-phone
 as well as embedded SIP software.
 oSIP is not limited to endpoint agents implementations
 and can also be used to implement SIP proxies
 or registration services.
 .
 oSIP currently provides an API for the SIP message parser,
 SDP message parser,
 and library to handle "SIP transactions"
 as defined by the SIP standards (RFC3261).