sofia-sip: sofia-sip (SIP User-Agent Library) sofia-sip: sofia-sip: Sofia-SIP - RFC3261 compliant SIP User-Agent library. sofia-sip: sofia-sip: sofia-sip: sofia-sip: sofia-sip: sofia-sip: sofia-sip: https://github.com/freeswitch/sofia-sip sofia-sip: