Spanning tree initialization:
- TreeState now uses sequence=1 and current timestamp per protocol spec
- Added ParentDeclaration::sign() and TreeState::sign_declaration() methods
- Node initialization logs identity (node_id, address)
Node lifecycle refactoring:
- Moved TUN init and thread spawning into async Node::start()
- Moved TUN shutdown and thread cleanup into async Node::stop()
- Node owns I/O infrastructure (thread handles, TunTx channel)
- Removed: init_tun(), take_tun_device(), tun_device(), tun_device_mut()
- Added: tun_tx() accessor for packet sending
tun.rs:
- Added run_tun_reader() function (moved from binary)
fips.rs binary reduced from 230 to 117 lines. All 171 tests pass.
- New icmp.rs module: builds RFC 4443 compliant ICMPv6 Type 1 Code 0
responses with proper checksum and packet validation
- TUN reader/writer separation: fd duplication allows independent I/O
on separate threads
- TunWriter services mpsc queue for multiple future packet sources
- Reader now sends ICMPv6 errors for unroutable packets instead of
silently dropping them
- 171 tests passing
- Add TUN interface detection on startup, delete existing before create
- Add proper interface deletion on shutdown via netlink
- Add TUN packet reader in separate thread with DEBUG logging
- Add graceful shutdown handling for expected "Bad address" error
- Add take_tun_device() to Node for reader ownership transfer
- Add shutdown_tun_interface() public function for cleanup by name
- Add tokio signal feature for Ctrl+C handling
- Add --wait / -w command-line flag for debugger attachment
- When --wait is set, daemon blocks after init with thread::park()
- Add ip link show output after TUN device creation for debugging
Johnathan Corgan