C socket library I've been building with Grok-Code for ~2 months, HTTP/2, TLS 1.3, and connection pooling. Protocols: - Full HTTP/1.1 and HTTP/2 with HPACK compression - HTTP client AND server (with HTTP/2 server push) - WebSocket with per-message deflate - TCP, UDP, and Unix domain sockets (with FD passing) Security (TLS 1.3 hardened): - Certificate pinning with SPKI hash verification - OCSP stapling and Certificate Transparency validation - Mutual TLS (mTLS) for client authentication - DTLS for secure UDP (with cookie-based DoS protection) - SYN flood protection and IP reputation tracking - Token bucket rate limiting Networking: - Proxy tunneling: HTTP CONNECT + SOCKS4/5 - Happy Eyeballs (RFC 8305) for fast dual-stack connects - Async DNS with worker thread pools Performance: - Arena-based memory management - Connection pooling with circuit breakers - Retry framework with exponential backoff + jitter - Graceful drain/shutdown for pools and servers - Cross-platform backends (epoll/kqueue/poll) - Vectored I/O and sendfile support - Prometheus/StatsD metrics export - kTLS kernel offload on the roadmap...