retrotom 

Keryx core primitives: binary readers/writers, transport and logging abstractions shared by every Keryx layer.

STUN (RFC 5389) message encoding, decoding and a lightweight client, from the Keryx WebRTC stack.

TURN client (RFC 8656): allocations, permissions, channel bindings and relayed datagrams, from the Keryx WebRTC stack.

SCTP over DTLS and WebRTC data channels (DCEP) from the Keryx WebRTC stack.

DTLS 1.2 handshake state machine and record layer (built on System.Security.Cryptography primitives) with SRTP keying-material export, from the Keryx WebRTC stack.

ICE agent (host, server-reflexive and TURN-relayed gathering, connectivity checks, nomination) from the Keryx WebRTC stack.

SDP parsing and generation (JSEP offer/answer subset) from the Keryx WebRTC stack.

SRTP/SRTCP protection (AES-CM + HMAC-SHA1, RFC 3711) from the Keryx WebRTC stack.

RTP and RTCP packet model, typed RTCP feedback (PLI/FIR/NACK/transport-cc) and media packetizers (H.264, Opus) from the Keryx WebRTC stack.

Keryx: a from-scratch WebRTC stack for .NET. This package is the composition root - an RTCPeerConnection-style API over the Keryx STUN/ICE/SDP/DTLS/SRTP/RTP/SCTP layers.

Pure-managed SIMD H.264 baseline-profile encoder for real-time streaming. No native dependencies; NEON, AVX2 and SSSE3 accelerated.