Integrating Erlang SSL for DTLS-SRTP in WebRTC

The article explores how Erlang's SSL module can be leveraged to perform DTLS-SRTP handshakes, which are integral to the WebRTC architecture. It emphasizes the necessity of DTLS for encrypting data in WebRTC and outlines the challenges involved, particularly with socket management. The author provides examples of server and client code to illustrate the process and discusses the need for custom transport implementations to avoid automatic socket handling by the SSL module, using a callback module for better control. Additionally, the article touches on how to choose protection profiles and obtain keying material, suggesting that expanding the Erlang SSL module could allow it to fully replace existing DTLS libraries like ex_dtls.