router

ALPN-based protocol multiplexer for radio/endpoint

ALPN

Application-Layer Protocol Negotiation — a TLS extension that lets peers agree on which protocol to use during the QUIC handshake, before any application data flows

dispatch

each protocol registers a unique ALPN string. when a connection arrives, the router examines the negotiated ALPN and dispatches to the correct protocol handler. similar to an HTTP router in web frameworks, but operating at the QUIC connection level

protocol handlers

a handler is any code implementing an accept method that receives a Connection and processes it according to that protocol's rules. radio/blob, radio/gossip, radio/docs, and radio/willow each register their own ALPN and handler

extensibility

custom protocols register their ALPN with the router and handle connections independently. radio is a toolkit, not a monolith — the router is the seam that makes composition possible without coupling

role in cyber

the router is how a single radio/endpoint serves multiple protocols simultaneously — transferring radio/blob, syncing radio/docs, broadcasting via radio/gossip, all on the same QUIC socket, multiplexed by ALPN. one port, many protocols, zero coordination overhead