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v1.6.0

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@ibnbd ibnbd released this 04 Jun 08:54
· 1 commit to main since this release
v1.6.0
e8d5e9a

What's New

This release adds a cross-platform transport — iOS and Android devices can now discover each other and exchange end-to-end encrypted messages over the local network using a platform-neutral wire protocol with a matching Kotlin implementation.

Cross-Platform Transport (Android Interop)

A new CrossPlatform module ships alongside the existing MultipeerConnectivity and remote-relay transports. The legacy wire formats are byte-identical to previous releases — existing consumers are unaffected.

  • CrossPlatformPool — actor owning the transport lifecycle: host-side handshake + rate limiting, guest-side connection + tap-code key derivation, resume bookkeeping
  • CrossPlatformSession / MoveChannel — per-peer encrypted session with strict monotone sequence counters and replay rejection
  • Canonical JSON wire format — keys sorted by Unicode code point, no insignificant whitespace, ISO-8601 millisecond timestamps, RFC-4648 padded base64 payloads — byte-identical encoding across Swift and Kotlin
  • ChaCha20-Poly1305 + HKDF-SHA256 — a 6-digit tap code plus per-side handshake nonces derive directional session keys; frames are length-prefixed AEAD
  • Bonjour/mDNS discovery — BonjourAdvertiser (NWListener) and BonjourBrowser (NWBrowser) with TXT records; service type is disjoint from the MultipeerConnectivity transport so the two coexist
  • Session resume — guests reconnect after a drop and re-handshake under fresh keys; the host replays unacknowledged frames from its outbound buffer
  • Host-side hardening — per-IP hello rate limiting, handshake timeouts, device blocking, and a closed 13-tag error taxonomy (CrossPlatformTransportError) mirrored on both platforms
  • Transport-agnostic core — the pool operates on a RawConnection abstraction; production wraps NWConnection via SocketConnection, tests use InMemoryConnection.pair()
  • Frozen reference vectors — HKDF, handshake, encrypted-frame, and game-action vectors asserted byte-equal on both the Swift and Kotlin sides lock wire compatibility

Compatibility

  • Legacy PoolMessage / MC / relay encoders unchanged — fully backward compatible
  • All 213 tests pass, including the pre-existing MC and relay suites
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