SIP Core RFCs
Core SIP (3261 and updates)
- RFC 3261 - SIP: Session Initiation Protocol
- RFC 3262 - Reliability of Provisional Responses in the Session Initiation Protocol (SIP)
- RFC 3263 - Session Initiation Protocol (SIP): Locating SIP Servers
- RFC 3264 - An Offer/Answer Model with the Session Description Protocol (SDP)
- RFC 6665 - SIP-Specific Event Notification (obsoletes RFC 3265)
SDP and SIP behavior
Often needed when working with SIP messaging and media:
- RFC 4566 - SDP: Session Description Protocol (syntax of SDP bodies in SIP)
- RFC 3581 - Symmetric Response Routing (rport) (Via rport; important for NAT)
- RFC 6026 - Correct Transaction Handling for 2xx Responses to SIP INVITE
Auth (used in typical SIP registration)
Not SIP specific, but used in the typical auth exchange: