nx_ice.nx

nx_ice.nx -- SOVEREIGN ICE (RFC 8445) primitives, NishiLang from the first byte up, composing nx_stun. Rung 2 of the Nishi P2P interop stack (rung 1 = nx_stun). ICE is how two peers behind NATs find a working path to each other: each gathers candidate addresses (host / server-reflexive via STUN / relayed), ranks them by PRIORITY, pairs them, and runs STUN Binding "connectivity checks" over each pair until one succeeds. This module provides the ICE-specific pieces on top of the sovereign STUN codec, with ZERO third-party code (no libnice, no libjuice), and KAT'd byte-exact against RFC 5769's own sample request. Provides: - the ICE STUN attributes: PRIORITY, USE-CANDIDATE, ICE-CONTROLLED, ICE-CONTROLLING, USERNAME - candidate PRIORITY (RFC 8445 5.1.2.1): 2^24*type_pref + 2^8*local_pref + (256 - component_id) - candidate-PAIR priority as an overflow-safe COMPARATOR (the 2^32 form overflows i64; we only ever need to order pairs, so we compare (min, max, controlling>controlled) lexicographically -- RFC 8445 6.1.2.3) - a full connectivity-check Binding Request builder (SOFTWARE, PRIORITY, ICE-CONTROLLED, USERNAME, MESSAGE-INTEGRITY, FINGERPRINT) that reproduces RFC 5769 2.1 byte-exact license_tier: INDEPENDENT_REDERIVE genealogy_id: international-research-sources/ietf/rfc_8445 + rfc_5769