native macOS codings agent orchestrator prowl.onev.cat
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6.3 kB · 172 lines
Swift
at main
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@MainActorprotocol MirrorTransport: AnyObject { var onEnrolled: ((MirrorSavedConnection) -> Void)? { get set } var onReady: (() -> Void)? { get set } var onMessage: ((MirrorMessage) -> Void)? { get set } var onClose: ((String?) -> Void)? { get set } var verifiedConfiguration: MirrorSavedConnection? { get } func start() func send(_ message: MirrorMessage, closeAfterSending: Bool) func close(_ reason: String?)}
extension MirrorTransport { var onEnrolled: ((MirrorSavedConnection) -> Void)? { get { nil } set {} } var verifiedConfiguration: MirrorSavedConnection? { nil } func send(_ message: MirrorMessage) { send(message, closeAfterSending: false) } func close() { close(nil) }}extension MirrorConnection: MirrorTransport {}
/// Authentication completes before discovery callbacks are exposed to the UI.@MainActorfinal class MirrorRemoteConnection: MirrorTransport { var onEnrolled: ((MirrorSavedConnection) -> Void)? var onReady: (() -> Void)? var onMessage: ((MirrorMessage) -> Void)? var onClose: ((String?) -> Void)? private(set) var verifiedConfiguration: MirrorSavedConnection? private var configuration: MirrorSavedConnection private var connection: MirrorConnection? private var challenge: MirrorMessage.Challenge? private var closed = false private var authenticated = false
private let restore: (MirrorSavedConnection) throws -> MirrorSavedConnection? private let persist: (MirrorSavedConnection) throws -> Void
init( configuration: MirrorSavedConnection, restore: @escaping (MirrorSavedConnection) throws -> MirrorSavedConnection? = { try MirrorSavedConnection.load(account: "host:" + $0.address + ":" + String($0.port)) }, persist: @escaping (MirrorSavedConnection) throws -> Void = { try $0.save(account: "host:" + $0.address + ":" + String($0.port)) try $0.save() } ) { self.configuration = configuration self.restore = restore self.persist = persist }
func start() { guard connection == nil, !closed else { return } do { guard configuration.port > 0 else { throw MirrorProtocolError.invalidMessage } if configuration.credential == nil, configuration.pairingKey.isEmpty, let saved = try restore(configuration) { configuration.credential = saved.credential } let parameters: NWParameters if let credential = configuration.credential { guard credential.key.count == 32 else { throw MirrorProtocolError.invalidMessage } parameters = try MirrorConnection.parameters(keys: [ (credential.deviceID.uuidString, credential.key) ]) } else { parameters = try MirrorConnection.parameters(pairingKey: configuration.pairingKey) } let peer = MirrorConnection( NWConnection( host: .init(configuration.address), port: .init(rawValue: configuration.port)!, using: parameters)) connection = peer peer.onMessage = { [weak self] in self?.receive($0) } peer.onClose = { [weak self] reason in guard let self, !self.closed else { return } self.closed = true self.onClose?(reason) } peer.start() } catch { close(error.localizedDescription) } }
func send(_ message: MirrorMessage, closeAfterSending: Bool = false) { guard authenticated, !closed else { return } connection?.send(message, closeAfterSending: closeAfterSending) }
func close(_ reason: String? = nil) { guard !closed else { return } closed = true connection?.onClose = nil connection?.close(reason) connection = nil onClose?(reason) }
private func receive(_ message: MirrorMessage) { if authenticated { onMessage?(message) return } do { switch message { case .challenge(let value): guard challenge == nil, value.nonce.count == 32 else { throw MirrorProtocolError.invalidMessage } challenge = value if let credential = configuration.credential { guard credential.hostID == value.hostID else { close("Host identity changed. Pair with this Host again.") return } connection?.send( .authenticate( .init( deviceID: credential.deviceID, proof: MirrorAuthentication.proof( key: credential.key, host: value.hostID, nonce: value.nonce, purpose: "device", identity: credential.deviceID.uuidString))) ) } else { let code = try MirrorPairingCode.normalized(configuration.pairingKey) // Device labels must not depend on DNS during authentication. let name = String(UIDevice.current.name.prefix(80)) connection?.send( .pair( .init( name: name, proof: MirrorAuthentication.proof( key: Data(code.utf8), host: value.hostID, nonce: value.nonce, purpose: "pair", identity: name)))) } case .paired(let credential): guard configuration.credential == nil, credential.hostID == challenge?.hostID, credential.key.count == 32 else { throw MirrorProtocolError.invalidMessage } configuration.credential = credential configuration.pairingKey = "" // Save before reconnect: a successful pairing response must never depend on UI lifetime. try persist(configuration) onEnrolled?(configuration) connection?.onClose = nil connection?.close() connection = nil challenge = nil start() case .authenticated(let hostID): guard let credential = configuration.credential, credential.hostID == hostID, challenge?.hostID == hostID else { throw MirrorProtocolError.invalidMessage } try persist(configuration) verifiedConfiguration = configuration authenticated = true onReady?() case .failure(let failure): close(failure.error) default: throw MirrorProtocolError.invalidMessage } } catch { close(error.localizedDescription) } }
}