SIPSorcery is a comprehensive real-time communications library for .NET implementing SIP, WebRTC, RTP/RTCP, STUN/TURN/ICE, DTLS-SRTP, and SCTP protocols from scratch. The core library (src/SIPSorcery) provides SIPTransport for signaling, RTCPeerConnection for WebRTC, RTPSession for media transport, and media endpoint abstractions (IAudioSink, IVideoSource) for decoupling capture and rendering. Satellite projects include SIPSorceryMedia.Abstractions (media interfaces), SIPSorceryMedia.FFmpeg and SIPSorceryMedia.Windows (codec backends), SIPSorcery.VP8 (a C# port of libvpx VP8), SIPSorcery.OpenAI.Realtime (OpenAI Realtime API client), and a CLI tool (SIPSorcery.Cli) with route/bridge commands for wiring media pipelines between SIP, WebRTC, and cloud realtime endpoints.
RSSDP is a .NET library implementing the Simple Service Discovery Protocol (SSDP) for UPnP device discovery and advertisement. The library enables applications to discover network services and advertise their own services on local networks using UDP multicast communication. It provides a clean separation of concerns with distinct components for device discovery (SsdpDeviceLocator), device publication (SsdpDevicePublisher), and network communication handling (SsdpCommunicationsServer). The library follows .NET best practices with interface-based dependency injection, proper IDisposable implementation, and event-driven architecture for device lifecycle events. It supports multiple .NET platforms including .NET Framework 4.8+, .NET 6/8+, .NET Standard 2.0, and Xamarin platforms via MAUI. The repository includes comprehensive unit tests, sample applications (console, MAUI, UWP), and generated documentation via DocFX.