替换context的实现逻辑
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//
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// SDLContext.swift
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// Tun
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//
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// Created by 安礼成 on 2024/2/29.
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//
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import Foundation
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import NetworkExtension
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import NIOCore
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import Combine
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// 上下文环境变量，全局共享
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/*
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1. 处理rsa的加解密逻辑
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*/
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@available(macOS 14, *)
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public class SDLContextNew {
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// 路由信息
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struct Route {
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let dstAddress: String
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let subnetMask: String
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var debugInfo: String {
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return "\(dstAddress):\(subnetMask)"
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}
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}
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let config: SDLConfiguration
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// tun网络地址信息
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var devAddr: SDLDevAddr
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// nat映射的相关信息, 暂时没有用处
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//var natAddress: SDLNatAddress?
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// nat的网络类型
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var natType: SDLNatProber.NatType = .blocked
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// AES加密，授权通过后，对象才会被创建
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var aesCipher: AESCipher
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// aes
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var aesKey: Data = Data()
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// rsa的相关配置, public_key是本地生成的
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let rsaCipher: RSACipher
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// 依赖的变量
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var udpHoleActor: SDLUDPHoleActor?
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var superClientActor: SDLSuperClientActor?
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var providerActor: SDLTunnelProviderActor
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// dns的client对象
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var dnsClient: DNSClient?
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// 数据包读取任务
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private var readTask: Task<(), Never>?
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private var sessionManager: SessionManager
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private var arpServer: ArpServer
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// 记录最后发送的stunRequest的cookie
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private var lastCookie: UInt32? = 0
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// 网络状态变化的健康
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private var monitor: SDLNetworkMonitor?
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// 内部socket通讯
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private var noticeClient: SDLNoticeClient?
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// 流量统计
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private var flowTracer = SDLFlowTracerActor()
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private var flowTracerCancel: AnyCancellable?
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// 处理holer
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private var holerPublishers: [Data:PassthroughSubject<RegisterRequest, Never>] = [:]
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private var bag = Set<AnyCancellable>()
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private var locker = NSLock()
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private let logger: SDLLogger
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private var rootTask: Task<Void, Error>?
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struct RegisterRequest {
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let srcMac: Data
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let dstMac: Data
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let networkId: UInt32
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}
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public init(provider: NEPacketTunnelProvider, config: SDLConfiguration, rsaCipher: RSACipher, aesCipher: AESCipher, logger: SDLLogger) {
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self.logger = logger
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self.config = config
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self.rsaCipher = rsaCipher
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self.aesCipher = aesCipher
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// 生成mac地址
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var devAddr = SDLDevAddr()
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devAddr.mac = Self.getMacAddress()
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self.devAddr = devAddr
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self.sessionManager = SessionManager()
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self.arpServer = ArpServer(known_macs: [:])
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self.providerActor = SDLTunnelProviderActor(provider: provider, logger: logger)
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}
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public func start() async throws {
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self.rootTask = Task {
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try await withThrowingTaskGroup(of: Void.self) { group in
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group.addTask {
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while !Task.isCancelled {
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do {
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try await self.startDnsClient()
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} catch let err {
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self.logger.log("[SDLContext] UDPHole get err: \(err)", level: .warning)
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try await Task.sleep(for: .seconds(2))
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}
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}
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}
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group.addTask {
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while !Task.isCancelled {
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do {
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try await self.startUDPHole()
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} catch let err {
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self.logger.log("[SDLContext] UDPHole get err: \(err)", level: .warning)
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try await Task.sleep(for: .seconds(2))
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}
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}
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}
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group.addTask {
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while !Task.isCancelled {
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do {
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try await self.startSuperClient()
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} catch let err {
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self.logger.log("[SDLContext] SuperClient get error: \(err), will restart", level: .warning)
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await self.arpServer.clear()
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try await Task.sleep(for: .seconds(2))
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}
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}
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}
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group.addTask {
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await self.startMonitor()
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}
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group.addTask {
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while !Task.isCancelled {
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do {
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try await self.startNoticeClient()
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} catch let err {
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self.logger.log("[SDLContext] noticeClient get err: \(err)", level: .warning)
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try await Task.sleep(for: .seconds(2))
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}
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}
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}
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try await group.waitForAll()
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}
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}
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try await self.rootTask?.value
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}
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public func stop() async {
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self.rootTask?.cancel()
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self.superClientActor = nil
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self.udpHoleActor = nil
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self.noticeClient = nil
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self.readTask?.cancel()
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}
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private func startNoticeClient() async throws {
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self.noticeClient = try await SDLNoticeClient(noticePort: self.config.noticePort, logger: self.logger)
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try await self.noticeClient?.start()
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self.logger.log("[SDLContext] notice_client task cancel", level: .warning)
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}
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private func startUDPHole() async throws {
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self.udpHoleActor = try await SDLUDPHoleActor(logger: self.logger)
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try await withThrowingTaskGroup(of: Void.self) { group in
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group.addTask {
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try await self.udpHoleActor?.start()
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}
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group.addTask {
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while !Task.isCancelled {
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try Task.checkCancellation()
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try await Task.sleep(nanoseconds: 5 * 1_000_000_000)
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try Task.checkCancellation()
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if let udpHoleActor = self.udpHoleActor {
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let cookie = await udpHoleActor.getCookieId()
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var stunRequest = SDLStunRequest()
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stunRequest.cookie = cookie
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stunRequest.clientID = self.config.clientId
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stunRequest.networkID = self.devAddr.networkID
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stunRequest.ip = self.devAddr.netAddr
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stunRequest.mac = self.devAddr.mac
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stunRequest.natType = UInt32(self.natType.rawValue)
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let remoteAddress = self.config.stunSocketAddress
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await udpHoleActor.send(type: .stunRequest, data: try stunRequest.serializedData(), remoteAddress: remoteAddress)
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self.lastCookie = cookie
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}
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}
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}
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group.addTask {
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if let eventFlow = self.udpHoleActor?.eventFlow {
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for try await event in eventFlow {
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try Task.checkCancellation()
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try await self.handleUDPEvent(event: event)
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}
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}
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}
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if let _ = try await group.next() {
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group.cancelAll()
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}
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}
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}
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private func startSuperClient() async throws {
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self.superClientActor = try await SDLSuperClientActor(host: self.config.superHost, port: self.config.superPort, logger: self.logger)
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try await withThrowingTaskGroup(of: Void.self) { group in
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defer {
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self.logger.log("[SDLContext] super client task cancel", level: .warning)
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}
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group.addTask {
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try await self.superClientActor?.start()
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}
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group.addTask {
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if let eventFlow = self.superClientActor?.eventFlow {
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for try await event in eventFlow {
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try await self.handleSuperEvent(event: event)
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}
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}
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}
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if let _ = try await group.next() {
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group.cancelAll()
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}
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}
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}
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private func startMonitor() async {
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self.monitor = SDLNetworkMonitor()
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for await event in self.monitor!.eventStream {
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switch event {
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case .changed:
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// TODO 需要重新探测网络的nat类型
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//self.natType = await SDLNatProber.getNatType(udpHole: self.udpHole, config: self.config, logger: self.logger)
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self.logger.log("didNetworkPathChanged, nat type is: \(self.natType)", level: .info)
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case .unreachable:
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self.logger.log("didNetworkPathUnreachable", level: .warning)
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}
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}
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}
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private func startDnsClient() async throws {
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let remoteDnsServer = config.remoteDnsServer
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let dnsSocketAddress = try SocketAddress.makeAddressResolvingHost(remoteDnsServer, port: 15353)
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self.dnsClient = try await DNSClient(dnsServerAddress: dnsSocketAddress, logger: self.logger)
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try await withThrowingTaskGroup(of: Void.self) { group in
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defer {
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self.logger.log("[SDLContext] dns client task cancel", level: .warning)
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}
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group.addTask {
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try await self.dnsClient?.start()
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}
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group.addTask {
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if let packetFlow = self.dnsClient?.packetFlow {
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for await packet in packetFlow {
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let nePacket = NEPacket(data: packet, protocolFamily: 2)
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await self.providerActor.writePackets(packets: [nePacket])
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}
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}
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}
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if let _ = try await group.next() {
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group.cancelAll()
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}
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}
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}
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private func handleSuperEvent(event: SDLSuperClientActor.SuperEvent) async throws {
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switch event {
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case .ready:
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self.logger.log("[SDLContext] get registerSuper, mac address: \(SDLUtil.formatMacAddress(mac: self.devAddr.mac))", level: .debug)
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var registerSuper = SDLRegisterSuper()
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registerSuper.version = UInt32(self.config.version)
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registerSuper.clientID = self.config.clientId
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registerSuper.devAddr = self.devAddr
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registerSuper.pubKey = self.rsaCipher.pubKey
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registerSuper.token = self.config.token
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registerSuper.networkCode = self.config.networkCode
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registerSuper.hostname = self.config.hostname
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guard let message = try await self.superClientActor?.request(type: .registerSuper, data: try registerSuper.serializedData()).get() else {
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return
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}
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switch message.packet {
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case .registerSuperAck(let registerSuperAck):
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// 需要对数据通过rsa的私钥解码
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let aesKey = try! self.rsaCipher.decode(data: Data(registerSuperAck.aesKey))
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let upgradeType = SDLUpgradeType(rawValue: registerSuperAck.upgradeType)
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self.logger.log("[SDLContext] get registerSuperAck, aes_key len: \(aesKey.count), network_id:\(registerSuperAck.devAddr.networkID)", level: .info)
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self.devAddr = registerSuperAck.devAddr
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if upgradeType == .force {
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let forceUpgrade = NoticeMessage.upgrade(prompt: registerSuperAck.upgradePrompt, address: registerSuperAck.upgradeAddress)
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await self.noticeClient?.send(data: forceUpgrade)
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exit(-1)
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}
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// 服务器分配的tun网卡信息
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do {
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try await self.providerActor.setNetworkSettings(devAddr: self.devAddr, dnsServer: DNSClient.Helper.dnsServer)
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self.startReader()
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} catch let err {
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self.logger.log("[SDLContext] setTunnelNetworkSettings get error: \(err)", level: .error)
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exit(-1)
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}
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self.aesKey = aesKey
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if upgradeType == .normal {
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let normalUpgrade = NoticeMessage.upgrade(prompt: registerSuperAck.upgradePrompt, address: registerSuperAck.upgradeAddress)
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await self.noticeClient?.send(data: normalUpgrade)
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}
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case .registerSuperNak(let nakPacket):
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let errorMessage = nakPacket.errorMessage
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guard let errorCode = SDLNAKErrorCode(rawValue: UInt8(nakPacket.errorCode)) else {
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return
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}
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switch errorCode {
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case .invalidToken, .nodeDisabled:
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let alertNotice = NoticeMessage.alert(alert: errorMessage)
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await self.noticeClient?.send(data: alertNotice)
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exit(-1)
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case .noIpAddress, .networkFault, .internalFault:
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let alertNotice = NoticeMessage.alert(alert: errorMessage)
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await self.noticeClient?.send(data: alertNotice)
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}
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self.logger.log("[SDLContext] Get a SuperNak message exit", level: .warning)
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default:
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()
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}
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case .event(let evt):
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switch evt {
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case .natChanged(let natChangedEvent):
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let dstMac = natChangedEvent.mac
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self.logger.log("[SDLContext] natChangedEvent, dstMac: \(dstMac)", level: .info)
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await sessionManager.removeSession(dstMac: dstMac)
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case .sendRegister(let sendRegisterEvent):
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self.logger.log("[SDLContext] sendRegisterEvent, ip: \(sendRegisterEvent)", level: .debug)
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let address = SDLUtil.int32ToIp(sendRegisterEvent.natIp)
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if let remoteAddress = try? SocketAddress.makeAddressResolvingHost(address, port: Int(sendRegisterEvent.natPort)) {
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// 发送register包
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var register = SDLRegister()
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register.networkID = self.devAddr.networkID
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register.srcMac = self.devAddr.mac
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register.dstMac = sendRegisterEvent.dstMac
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await self.udpHoleActor?.send(type: .register, data: try register.serializedData(), remoteAddress: remoteAddress)
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}
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case .networkShutdown(let shutdownEvent):
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let alertNotice = NoticeMessage.alert(alert: shutdownEvent.message)
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await self.noticeClient?.send(data: alertNotice)
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exit(-1)
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}
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case .command(let packetId, let command):
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switch command {
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case .changeNetwork(let changeNetworkCommand):
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// 需要对数据通过rsa的私钥解码
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let aesKey = try! self.rsaCipher.decode(data: Data(changeNetworkCommand.aesKey))
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self.logger.log("[SDLContext] change network command get aes_key len: \(aesKey.count)", level: .info)
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self.devAddr = changeNetworkCommand.devAddr
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// 服务器分配的tun网卡信息
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do {
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try await self.providerActor.setNetworkSettings(devAddr: self.devAddr, dnsServer: DNSClient.Helper.dnsServer)
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self.startReader()
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} catch let err {
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self.logger.log("[SDLContext] setTunnelNetworkSettings get error: \(err)", level: .error)
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exit(-1)
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}
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self.aesKey = aesKey
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var commandAck = SDLCommandAck()
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commandAck.status = true
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await self.superClientActor?.send(type: .commandAck, packetId: packetId, data: try commandAck.serializedData())
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}
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}
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}
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private func handleUDPEvent(event: SDLUDPHoleActor.UDPEvent) async throws {
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switch event {
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case .ready:
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// 获取当前网络的类型
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//self.natType = await SDLNatProber.getNatType(udpHole: self.udpHole, config: self.config)
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self.logger.log("[SDLContext] nat type is: \(self.natType)", level: .debug)
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case .message(let remoteAddress, let message):
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switch message {
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case .register(let register):
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self.logger.log("register packet: \(register), dev_addr: \(self.devAddr)", level: .debug)
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// 判断目标地址是否是tun的网卡地址, 并且是在同一个网络下
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if register.dstMac == self.devAddr.mac && register.networkID == self.devAddr.networkID {
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// 回复ack包
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var registerAck = SDLRegisterAck()
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registerAck.networkID = self.devAddr.networkID
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registerAck.srcMac = self.devAddr.mac
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registerAck.dstMac = register.srcMac
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await self.udpHoleActor?.send(type: .registerAck, data: try registerAck.serializedData(), remoteAddress: remoteAddress)
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// 这里需要建立到来源的会话, 在复杂网络下，通过super-node查询到的nat地址不一定靠谱，需要通过udp包的来源地址作为nat地址
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let session = Session(dstMac: register.srcMac, natAddress: remoteAddress)
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await self.sessionManager.addSession(session: session)
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} else {
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self.logger.log("SDLContext didReadRegister get a invalid packet, because dst_ip not matched: \(register.dstMac)", level: .warning)
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}
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case .registerAck(let registerAck):
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// 判断目标地址是否是tun的网卡地址, 并且是在同一个网络下
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if registerAck.dstMac == self.devAddr.mac && registerAck.networkID == self.devAddr.networkID {
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let session = Session(dstMac: registerAck.srcMac, natAddress: remoteAddress)
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await self.sessionManager.addSession(session: session)
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} else {
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self.logger.log("SDLContext didReadRegisterAck get a invalid packet, because dst_mac not matched: \(registerAck.dstMac)", level: .warning)
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}
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case .stunReply(let stunReply):
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let cookie = stunReply.cookie
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if cookie == self.lastCookie {
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// 记录下当前在nat上的映射信息，暂时没有用；后续会用来判断网络类型
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//self.natAddress = stunReply.natAddress
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self.logger.log("[SDLContext] get a stunReply: \(try! stunReply.jsonString())", level: .debug)
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}
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default:
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()
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}
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case .data(let data):
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let mac = LayerPacket.MacAddress(data: data.dstMac)
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guard (data.dstMac == self.devAddr.mac || mac.isBroadcast() || mac.isMulticast()) else {
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return
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}
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|
||||
guard let decyptedData = try? self.aesCipher.decypt(aesKey: self.aesKey, data: Data(data.data)) else {
|
||||
return
|
||||
}
|
||||
|
||||
do {
|
||||
let layerPacket = try LayerPacket(layerData: decyptedData)
|
||||
|
||||
await self.flowTracer.inc(num: decyptedData.count, type: .inbound)
|
||||
// 处理arp请求
|
||||
switch layerPacket.type {
|
||||
case .arp:
|
||||
// 判断如果收到的是arp请求
|
||||
if let arpPacket = ARPPacket(data: layerPacket.data) {
|
||||
if arpPacket.targetIP == self.devAddr.netAddr {
|
||||
switch arpPacket.opcode {
|
||||
case .request:
|
||||
self.logger.log("[SDLContext] get arp request packet", level: .debug)
|
||||
let response = ARPPacket.arpResponse(for: arpPacket, mac: self.devAddr.mac, ip: self.devAddr.netAddr)
|
||||
await self.routeLayerPacket(dstMac: arpPacket.senderMAC, type: .arp, data: response.marshal())
|
||||
case .response:
|
||||
self.logger.log("[SDLContext] get arp response packet", level: .debug)
|
||||
await self.arpServer.append(ip: arpPacket.senderIP, mac: arpPacket.senderMAC)
|
||||
}
|
||||
} else {
|
||||
self.logger.log("[SDLContext] get invalid arp packet: \(arpPacket), target_ip: \(SDLUtil.int32ToIp(arpPacket.targetIP)), net ip: \(SDLUtil.int32ToIp(self.devAddr.netAddr))", level: .debug)
|
||||
}
|
||||
} else {
|
||||
self.logger.log("[SDLContext] get invalid arp packet", level: .debug)
|
||||
}
|
||||
case .ipv4:
|
||||
guard let ipPacket = IPPacket(layerPacket.data), ipPacket.header.destination == self.devAddr.netAddr else {
|
||||
return
|
||||
}
|
||||
let packet = NEPacket(data: ipPacket.data, protocolFamily: 2)
|
||||
await self.providerActor.writePackets(packets: [packet])
|
||||
default:
|
||||
self.logger.log("[SDLContext] get invalid packet", level: .debug)
|
||||
}
|
||||
} catch let err {
|
||||
self.logger.log("[SDLContext] didReadData err: \(err)", level: .warning)
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// 流量统计
|
||||
// public func flowReportTask() {
|
||||
// Task {
|
||||
// // 每分钟汇报一次
|
||||
// self.flowTracerCancel = Timer.publish(every: 60.0, on: .main, in: .common).autoconnect()
|
||||
// .sink { _ in
|
||||
// Task {
|
||||
// let (forwardNum, p2pNum, inboundNum) = await self.flowTracer.reset()
|
||||
// await self.superClient?.flowReport(forwardNum: forwardNum, p2pNum: p2pNum, inboundNum: inboundNum)
|
||||
// }
|
||||
// }
|
||||
// }
|
||||
// }
|
||||
|
||||
// 开始读取数据, 用单独的线程处理packetFlow
|
||||
private func startReader() {
|
||||
// 停止之前的任务
|
||||
self.readTask?.cancel()
|
||||
|
||||
// 开启新的任务
|
||||
self.readTask = Task(priority: .high) {
|
||||
repeat {
|
||||
let packets = await self.providerActor.readPackets()
|
||||
for packet in packets {
|
||||
await self.dealPacket(data: packet)
|
||||
}
|
||||
} while true
|
||||
}
|
||||
}
|
||||
|
||||
// 处理读取的每个数据包
|
||||
private func dealPacket(data: Data) async {
|
||||
guard let packet = IPPacket(data) else {
|
||||
return
|
||||
}
|
||||
|
||||
if DNSClient.Helper.isDnsRequestPacket(ipPacket: packet) {
|
||||
let destIp = packet.header.destination_ip
|
||||
NSLog("destIp: \(destIp), int: \(packet.header.destination)")
|
||||
await self.dnsClient?.forward(ipPacket: packet)
|
||||
}
|
||||
else {
|
||||
Task.detached {
|
||||
let dstIp = packet.header.destination
|
||||
// 本地通讯, 目标地址是本地服务器的ip地址
|
||||
if dstIp == self.devAddr.netAddr {
|
||||
let nePacket = NEPacket(data: packet.data, protocolFamily: 2)
|
||||
await self.providerActor.writePackets(packets: [nePacket])
|
||||
return
|
||||
}
|
||||
|
||||
// 查找arp缓存中是否有目标mac地址
|
||||
if let dstMac = await self.arpServer.query(ip: dstIp) {
|
||||
await self.routeLayerPacket(dstMac: dstMac, type: .ipv4, data: packet.data)
|
||||
}
|
||||
else {
|
||||
// 构造arp请求
|
||||
let broadcastMac = Data([0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF])
|
||||
let arpReqeust = ARPPacket.arpRequest(senderIP: self.devAddr.netAddr, senderMAC: self.devAddr.mac, targetIP: dstIp)
|
||||
await self.routeLayerPacket(dstMac: broadcastMac, type: .arp, data: arpReqeust.marshal())
|
||||
|
||||
self.logger.log("[SDLContext] dstIp: \(dstIp) arp query not found", level: .debug)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private func routeLayerPacket(dstMac: Data, type: LayerPacket.PacketType, data: Data) async {
|
||||
// 将数据封装层2层的数据包
|
||||
let layerPacket = LayerPacket(dstMac: dstMac, srcMac: self.devAddr.mac, type: type, data: data)
|
||||
guard let encodedPacket = try? self.aesCipher.encrypt(aesKey: self.aesKey, data: layerPacket.marshal()) else {
|
||||
return
|
||||
}
|
||||
|
||||
// 构造数据包
|
||||
var dataPacket = SDLData()
|
||||
dataPacket.networkID = self.devAddr.networkID
|
||||
dataPacket.srcMac = self.devAddr.mac
|
||||
dataPacket.dstMac = dstMac
|
||||
dataPacket.ttl = 255
|
||||
dataPacket.data = encodedPacket
|
||||
|
||||
// 通过session发送到对端
|
||||
if let session = await self.sessionManager.getSession(toAddress: dstMac) {
|
||||
self.logger.log("[SDLContext] send packet by session: \(session)", level: .debug)
|
||||
await self.udpHoleActor?.send(type: .data, data: try! dataPacket.serializedData(), remoteAddress: session.natAddress)
|
||||
await self.flowTracer.inc(num: data.count, type: .p2p)
|
||||
}
|
||||
else {
|
||||
// 通过super_node进行转发
|
||||
let superAddress = self.config.stunSocketAddress
|
||||
await self.udpHoleActor?.send(type: .data, data: try! dataPacket.serializedData(), remoteAddress: superAddress)
|
||||
// 流量统计
|
||||
await self.flowTracer.inc(num: data.count, type: .forward)
|
||||
|
||||
// 尝试打洞
|
||||
let registerRequest = RegisterRequest(srcMac: self.devAddr.mac, dstMac: dstMac, networkId: self.devAddr.networkID)
|
||||
self.submitRegisterRequest(request: registerRequest)
|
||||
}
|
||||
}
|
||||
|
||||
private func submitRegisterRequest(request: RegisterRequest) {
|
||||
self.locker.lock()
|
||||
defer {
|
||||
self.locker.unlock()
|
||||
}
|
||||
|
||||
let dstMac = request.dstMac
|
||||
if let publisher = self.holerPublishers[dstMac] {
|
||||
publisher.send(request)
|
||||
} else {
|
||||
let publisher = PassthroughSubject<RegisterRequest, Never>()
|
||||
publisher.throttle(for: .seconds(5), scheduler: DispatchQueue.global(), latest: true)
|
||||
.sink { request in
|
||||
Task {
|
||||
await self.tryHole(request: request)
|
||||
}
|
||||
}
|
||||
.store(in: &self.bag)
|
||||
|
||||
self.holerPublishers[dstMac] = publisher
|
||||
}
|
||||
}
|
||||
|
||||
private func tryHole(request: RegisterRequest) async {
|
||||
var queryInfo = SDLQueryInfo()
|
||||
queryInfo.dstMac = request.dstMac
|
||||
|
||||
guard let message = try? await self.superClientActor?.request(type: .queryInfo, data: try queryInfo.serializedData()).get() else {
|
||||
return
|
||||
}
|
||||
|
||||
switch message.packet {
|
||||
case .empty:
|
||||
self.logger.log("[SDLContext] hole query_info get empty: \(message)", level: .debug)
|
||||
case .peerInfo(let peerInfo):
|
||||
if let remoteAddress = peerInfo.v4Info.socketAddress() {
|
||||
self.logger.log("[SDLContext] hole sock address: \(remoteAddress)", level: .debug)
|
||||
// 发送register包
|
||||
var register = SDLRegister()
|
||||
register.networkID = request.networkId
|
||||
register.srcMac = request.srcMac
|
||||
register.dstMac = request.dstMac
|
||||
|
||||
await self.udpHoleActor?.send(type: .register, data: try! register.serializedData(), remoteAddress: remoteAddress)
|
||||
} else {
|
||||
self.logger.log("[SDLContext] hole sock address is invalid: \(peerInfo.v4Info)", level: .warning)
|
||||
}
|
||||
default:
|
||||
self.logger.log("[SDLContext] hole query_info is packet: \(message)", level: .warning)
|
||||
}
|
||||
}
|
||||
|
||||
deinit {
|
||||
self.rootTask?.cancel()
|
||||
self.udpHoleActor = nil
|
||||
self.superClientActor = nil
|
||||
self.dnsClient = nil
|
||||
}
|
||||
|
||||
// 获取mac地址
|
||||
public static func getMacAddress() -> Data {
|
||||
let key = "gMacAddress2"
|
||||
|
||||
let userDefaults = UserDefaults.standard
|
||||
if let mac = userDefaults.value(forKey: key) as? Data {
|
||||
return mac
|
||||
}
|
||||
else {
|
||||
let mac = generateMacAddress()
|
||||
userDefaults.setValue(mac, forKey: key)
|
||||
|
||||
return mac
|
||||
}
|
||||
}
|
||||
|
||||
// 随机生成mac地址
|
||||
private static func generateMacAddress() -> Data {
|
||||
var macAddress = [UInt8](repeating: 0, count: 6)
|
||||
for i in 0..<6 {
|
||||
macAddress[i] = UInt8.random(in: 0...255)
|
||||
}
|
||||
|
||||
return Data(macAddress)
|
||||
}
|
||||
|
||||
}
|
||||
@ -135,24 +135,24 @@ actor SDLUDPHoleActor {
|
||||
return self.cookieGenerator.nextId()
|
||||
}
|
||||
|
||||
// // 探测tun信息
|
||||
// func stunProbe(remoteAddress: SocketAddress, attr: SDLProbeAttr = .none, timeout: Int = 5) async throws -> SDLStunProbeReply {
|
||||
// return try await self._stunProbe(remoteAddress: remoteAddress, attr: attr, timeout: timeout).get()
|
||||
// }
|
||||
//
|
||||
// private func _stunProbe(remoteAddress: SocketAddress, attr: SDLProbeAttr = .none, timeout: Int) -> EventLoopFuture<SDLStunProbeReply> {
|
||||
// let cookie = self.cookieGenerator.nextId()
|
||||
// var stunProbe = SDLStunProbe()
|
||||
// stunProbe.cookie = cookie
|
||||
// stunProbe.attr = UInt32(attr.rawValue)
|
||||
// self.send( type: .stunProbe, data: try! stunProbe.serializedData(), remoteAddress: remoteAddress)
|
||||
// self.logger.log("[SDLUDPHole] stunProbe: \(remoteAddress)", level: .debug)
|
||||
//
|
||||
// let promise = self.asyncChannel.channel.eventLoop.makePromise(of: SDLStunProbeReply.self)
|
||||
// self.promises[cookie] = promise
|
||||
//
|
||||
// return promise.futureResult
|
||||
// }
|
||||
// 探测tun信息
|
||||
func stunProbe(remoteAddress: SocketAddress, attr: SDLProbeAttr = .none, timeout: Int = 5) async throws -> SDLStunProbeReply {
|
||||
return try await self._stunProbe(remoteAddress: remoteAddress, attr: attr, timeout: timeout).get()
|
||||
}
|
||||
|
||||
private func _stunProbe(remoteAddress: SocketAddress, attr: SDLProbeAttr = .none, timeout: Int) -> EventLoopFuture<SDLStunProbeReply> {
|
||||
let cookie = self.cookieGenerator.nextId()
|
||||
var stunProbe = SDLStunProbe()
|
||||
stunProbe.cookie = cookie
|
||||
stunProbe.attr = UInt32(attr.rawValue)
|
||||
self.send( type: .stunProbe, data: try! stunProbe.serializedData(), remoteAddress: remoteAddress)
|
||||
self.logger.log("[SDLUDPHole] stunProbe: \(remoteAddress)", level: .debug)
|
||||
|
||||
let promise = self.asyncChannel.channel.eventLoop.makePromise(of: SDLStunProbeReply.self)
|
||||
self.promises[cookie] = promise
|
||||
|
||||
return promise.futureResult
|
||||
}
|
||||
|
||||
private func trigger(probeReply: SDLStunProbeReply) {
|
||||
let id = probeReply.cookie
|
||||
|
||||
@ -16,7 +16,7 @@ import Combine
|
||||
*/
|
||||
|
||||
@available(macOS 14, *)
|
||||
public class SDLContext: @unchecked Sendable {
|
||||
public class SDLContext {
|
||||
|
||||
// 路由信息
|
||||
struct Route {
|
||||
@ -36,7 +36,7 @@ public class SDLContext: @unchecked Sendable {
|
||||
// nat映射的相关信息, 暂时没有用处
|
||||
//var natAddress: SDLNatAddress?
|
||||
// nat的网络类型
|
||||
var natType: SDLNatProber.NatType = .blocked
|
||||
var natType: NatType = .blocked
|
||||
|
||||
// AES加密，授权通过后，对象才会被创建
|
||||
var aesCipher: AESCipher
|
||||
@ -48,8 +48,9 @@ public class SDLContext: @unchecked Sendable {
|
||||
let rsaCipher: RSACipher
|
||||
|
||||
// 依赖的变量
|
||||
var udpHole: SDLUDPHole?
|
||||
var superClient: SDLSuperClient?
|
||||
var udpHoleActor: SDLUDPHoleActor?
|
||||
var superClientActor: SDLSuperClientActor?
|
||||
var providerActor: SDLTunnelProviderActor
|
||||
|
||||
// dns的client对象
|
||||
var dnsClient: DNSClient?
|
||||
@ -57,8 +58,6 @@ public class SDLContext: @unchecked Sendable {
|
||||
// 数据包读取任务
|
||||
private var readTask: Task<(), Never>?
|
||||
|
||||
let provider: NEPacketTunnelProvider
|
||||
|
||||
private var sessionManager: SessionManager
|
||||
private var arpServer: ArpServer
|
||||
|
||||
@ -81,7 +80,6 @@ public class SDLContext: @unchecked Sendable {
|
||||
private var locker = NSLock()
|
||||
|
||||
private let logger: SDLLogger
|
||||
|
||||
private var rootTask: Task<Void, Error>?
|
||||
|
||||
struct RegisterRequest {
|
||||
@ -102,15 +100,14 @@ public class SDLContext: @unchecked Sendable {
|
||||
devAddr.mac = Self.getMacAddress()
|
||||
self.devAddr = devAddr
|
||||
|
||||
self.provider = provider
|
||||
self.sessionManager = SessionManager()
|
||||
self.arpServer = ArpServer(known_macs: [:])
|
||||
self.providerActor = SDLTunnelProviderActor(provider: provider, logger: logger)
|
||||
}
|
||||
|
||||
public func start() async throws {
|
||||
self.rootTask = Task {
|
||||
try await withThrowingTaskGroup(of: Void.self) { group in
|
||||
|
||||
group.addTask {
|
||||
while !Task.isCancelled {
|
||||
do {
|
||||
@ -169,8 +166,8 @@ public class SDLContext: @unchecked Sendable {
|
||||
|
||||
public func stop() async {
|
||||
self.rootTask?.cancel()
|
||||
self.superClient = nil
|
||||
self.udpHole = nil
|
||||
self.superClientActor = nil
|
||||
self.udpHoleActor = nil
|
||||
self.noticeClient = nil
|
||||
|
||||
self.readTask?.cancel()
|
||||
@ -183,22 +180,39 @@ public class SDLContext: @unchecked Sendable {
|
||||
}
|
||||
|
||||
private func startUDPHole() async throws {
|
||||
self.udpHole = try await SDLUDPHole(logger: self.logger)
|
||||
self.udpHoleActor = try await SDLUDPHoleActor(logger: self.logger)
|
||||
try await withThrowingTaskGroup(of: Void.self) { group in
|
||||
group.addTask {
|
||||
try await self.udpHole?.start()
|
||||
try await self.udpHoleActor?.start()
|
||||
}
|
||||
|
||||
group.addTask {
|
||||
while !Task.isCancelled {
|
||||
try Task.checkCancellation()
|
||||
try await Task.sleep(nanoseconds: 5 * 1_000_000_000)
|
||||
self.lastCookie = await self.udpHole?.stunRequest(context: self)
|
||||
try Task.checkCancellation()
|
||||
|
||||
if let udpHoleActor = self.udpHoleActor {
|
||||
let cookie = await udpHoleActor.getCookieId()
|
||||
var stunRequest = SDLStunRequest()
|
||||
stunRequest.cookie = cookie
|
||||
stunRequest.clientID = self.config.clientId
|
||||
stunRequest.networkID = self.devAddr.networkID
|
||||
stunRequest.ip = self.devAddr.netAddr
|
||||
stunRequest.mac = self.devAddr.mac
|
||||
stunRequest.natType = UInt32(self.natType.rawValue)
|
||||
|
||||
let remoteAddress = self.config.stunSocketAddress
|
||||
await udpHoleActor.send(type: .stunRequest, data: try stunRequest.serializedData(), remoteAddress: remoteAddress)
|
||||
self.lastCookie = cookie
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
group.addTask {
|
||||
if let eventFlow = self.udpHole?.eventFlow {
|
||||
if let eventFlow = self.udpHoleActor?.eventFlow {
|
||||
for try await event in eventFlow {
|
||||
try Task.checkCancellation()
|
||||
try await self.handleUDPEvent(event: event)
|
||||
}
|
||||
}
|
||||
@ -212,18 +226,18 @@ public class SDLContext: @unchecked Sendable {
|
||||
}
|
||||
|
||||
private func startSuperClient() async throws {
|
||||
self.superClient = try await SDLSuperClient(host: self.config.superHost, port: self.config.superPort, logger: self.logger)
|
||||
self.superClientActor = try await SDLSuperClientActor(host: self.config.superHost, port: self.config.superPort, logger: self.logger)
|
||||
try await withThrowingTaskGroup(of: Void.self) { group in
|
||||
defer {
|
||||
self.logger.log("[SDLContext] super client task cancel", level: .warning)
|
||||
}
|
||||
|
||||
group.addTask {
|
||||
try await self.superClient?.start()
|
||||
try await self.superClientActor?.start()
|
||||
}
|
||||
|
||||
group.addTask {
|
||||
if let eventFlow = self.superClient?.eventFlow {
|
||||
if let eventFlow = self.superClientActor?.eventFlow {
|
||||
for try await event in eventFlow {
|
||||
try await self.handleSuperEvent(event: event)
|
||||
}
|
||||
@ -241,8 +255,8 @@ public class SDLContext: @unchecked Sendable {
|
||||
for await event in self.monitor!.eventStream {
|
||||
switch event {
|
||||
case .changed:
|
||||
// 需要重新探测网络的nat类型
|
||||
self.natType = await SDLNatProber.getNatType(udpHole: self.udpHole, config: self.config, logger: self.logger)
|
||||
// TODO 需要重新探测网络的nat类型
|
||||
//self.natType = await SDLNatProber.getNatType(udpHole: self.udpHole, config: self.config, logger: self.logger)
|
||||
self.logger.log("didNetworkPathChanged, nat type is: \(self.natType)", level: .info)
|
||||
case .unreachable:
|
||||
self.logger.log("didNetworkPathUnreachable", level: .warning)
|
||||
@ -268,7 +282,7 @@ public class SDLContext: @unchecked Sendable {
|
||||
if let packetFlow = self.dnsClient?.packetFlow {
|
||||
for await packet in packetFlow {
|
||||
let nePacket = NEPacket(data: packet, protocolFamily: 2)
|
||||
self.provider.packetFlow.writePacketObjects([nePacket])
|
||||
await self.providerActor.writePackets(packets: [nePacket])
|
||||
}
|
||||
}
|
||||
|
||||
@ -280,11 +294,19 @@ public class SDLContext: @unchecked Sendable {
|
||||
}
|
||||
}
|
||||
|
||||
private func handleSuperEvent(event: SDLSuperClient.SuperEvent) async throws {
|
||||
private func handleSuperEvent(event: SDLSuperClientActor.SuperEvent) async throws {
|
||||
switch event {
|
||||
case .ready:
|
||||
self.logger.log("[SDLContext] get registerSuper, mac address: \(SDLUtil.formatMacAddress(mac: self.devAddr.mac))", level: .debug)
|
||||
guard let message = try await self.superClient?.registerSuper(context: self).get() else {
|
||||
var registerSuper = SDLRegisterSuper()
|
||||
registerSuper.version = UInt32(self.config.version)
|
||||
registerSuper.clientID = self.config.clientId
|
||||
registerSuper.devAddr = self.devAddr
|
||||
registerSuper.pubKey = self.rsaCipher.pubKey
|
||||
registerSuper.token = self.config.token
|
||||
registerSuper.networkCode = self.config.networkCode
|
||||
registerSuper.hostname = self.config.hostname
|
||||
guard let message = try await self.superClientActor?.request(type: .registerSuper, data: try registerSuper.serializedData()).get() else {
|
||||
return
|
||||
}
|
||||
|
||||
@ -304,9 +326,15 @@ public class SDLContext: @unchecked Sendable {
|
||||
}
|
||||
|
||||
// 服务器分配的tun网卡信息
|
||||
await self.didNetworkConfigChanged(devAddr: self.devAddr, dnsServer: DNSClient.Helper.dnsServer)
|
||||
self.aesKey = aesKey
|
||||
do {
|
||||
try await self.providerActor.setNetworkSettings(devAddr: self.devAddr, dnsServer: DNSClient.Helper.dnsServer)
|
||||
self.startReader()
|
||||
} catch let err {
|
||||
self.logger.log("[SDLContext] setTunnelNetworkSettings get error: \(err)", level: .error)
|
||||
exit(-1)
|
||||
}
|
||||
|
||||
self.aesKey = aesKey
|
||||
if upgradeType == .normal {
|
||||
let normalUpgrade = NoticeMessage.upgrade(prompt: registerSuperAck.upgradePrompt, address: registerSuperAck.upgradeAddress)
|
||||
await self.noticeClient?.send(data: normalUpgrade)
|
||||
@ -343,7 +371,11 @@ public class SDLContext: @unchecked Sendable {
|
||||
let address = SDLUtil.int32ToIp(sendRegisterEvent.natIp)
|
||||
if let remoteAddress = try? SocketAddress.makeAddressResolvingHost(address, port: Int(sendRegisterEvent.natPort)) {
|
||||
// 发送register包
|
||||
await self.udpHole?.sendRegister(remoteAddress: remoteAddress, networkId: self.devAddr.networkID, srcMac: self.devAddr.mac, dst_mac: sendRegisterEvent.dstMac)
|
||||
var register = SDLRegister()
|
||||
register.networkID = self.devAddr.networkID
|
||||
register.srcMac = self.devAddr.mac
|
||||
register.dstMac = sendRegisterEvent.dstMac
|
||||
await self.udpHoleActor?.send(type: .register, data: try register.serializedData(), remoteAddress: remoteAddress)
|
||||
}
|
||||
|
||||
case .networkShutdown(let shutdownEvent):
|
||||
@ -360,19 +392,25 @@ public class SDLContext: @unchecked Sendable {
|
||||
self.devAddr = changeNetworkCommand.devAddr
|
||||
|
||||
// 服务器分配的tun网卡信息
|
||||
await self.didNetworkConfigChanged(devAddr: self.devAddr, dnsServer: DNSClient.Helper.dnsServer)
|
||||
do {
|
||||
try await self.providerActor.setNetworkSettings(devAddr: self.devAddr, dnsServer: DNSClient.Helper.dnsServer)
|
||||
self.startReader()
|
||||
} catch let err {
|
||||
self.logger.log("[SDLContext] setTunnelNetworkSettings get error: \(err)", level: .error)
|
||||
exit(-1)
|
||||
}
|
||||
|
||||
self.aesKey = aesKey
|
||||
|
||||
var commandAck = SDLCommandAck()
|
||||
commandAck.status = true
|
||||
|
||||
await self.superClient?.commandAck(packetId: packetId, ack: commandAck)
|
||||
await self.superClientActor?.send(type: .commandAck, packetId: packetId, data: try commandAck.serializedData())
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
private func handleUDPEvent(event: SDLUDPHole.UDPEvent) async throws {
|
||||
private func handleUDPEvent(event: SDLUDPHoleActor.UDPEvent) async throws {
|
||||
switch event {
|
||||
case .ready:
|
||||
// 获取当前网络的类型
|
||||
@ -386,7 +424,12 @@ public class SDLContext: @unchecked Sendable {
|
||||
// 判断目标地址是否是tun的网卡地址, 并且是在同一个网络下
|
||||
if register.dstMac == self.devAddr.mac && register.networkID == self.devAddr.networkID {
|
||||
// 回复ack包
|
||||
await self.udpHole?.sendRegisterAck(context: self, remoteAddress: remoteAddress, dst_mac: register.srcMac)
|
||||
var registerAck = SDLRegisterAck()
|
||||
registerAck.networkID = self.devAddr.networkID
|
||||
registerAck.srcMac = self.devAddr.mac
|
||||
registerAck.dstMac = register.srcMac
|
||||
|
||||
await self.udpHoleActor?.send(type: .registerAck, data: try registerAck.serializedData(), remoteAddress: remoteAddress)
|
||||
// 这里需要建立到来源的会话, 在复杂网络下，通过super-node查询到的nat地址不一定靠谱，需要通过udp包的来源地址作为nat地址
|
||||
let session = Session(dstMac: register.srcMac, natAddress: remoteAddress)
|
||||
await self.sessionManager.addSession(session: session)
|
||||
@ -452,7 +495,7 @@ public class SDLContext: @unchecked Sendable {
|
||||
return
|
||||
}
|
||||
let packet = NEPacket(data: ipPacket.data, protocolFamily: 2)
|
||||
self.provider.packetFlow.writePacketObjects([packet])
|
||||
await self.providerActor.writePackets(packets: [packet])
|
||||
default:
|
||||
self.logger.log("[SDLContext] get invalid packet", level: .debug)
|
||||
}
|
||||
@ -477,50 +520,6 @@ public class SDLContext: @unchecked Sendable {
|
||||
// }
|
||||
// }
|
||||
|
||||
// 网络改变时需要重新配置网络信息
|
||||
private func didNetworkConfigChanged(devAddr: SDLDevAddr, dnsServer: String) async {
|
||||
let netAddress = SDLNetAddress(ip: devAddr.netAddr, maskLen: UInt8(devAddr.netBitLen))
|
||||
let routes = [
|
||||
Route(dstAddress: netAddress.networkAddress, subnetMask: netAddress.maskAddress),
|
||||
Route(dstAddress: dnsServer, subnetMask: "255.255.255.255")
|
||||
]
|
||||
|
||||
// Add code here to start the process of connecting the tunnel.
|
||||
let networkSettings = NEPacketTunnelNetworkSettings(tunnelRemoteAddress: "8.8.8.8")
|
||||
networkSettings.mtu = 1460
|
||||
|
||||
// 设置网卡的DNS解析
|
||||
|
||||
let networkDomain = devAddr.networkDomain
|
||||
let dnsSettings = NEDNSSettings(servers: [dnsServer])
|
||||
dnsSettings.searchDomains = [networkDomain]
|
||||
dnsSettings.matchDomains = [networkDomain]
|
||||
dnsSettings.matchDomainsNoSearch = false
|
||||
networkSettings.dnsSettings = dnsSettings
|
||||
self.logger.log("[SDLContext] Tun started at network ip: \(netAddress.ipAddress), mask: \(netAddress.maskAddress)", level: .info)
|
||||
|
||||
let ipv4Settings = NEIPv4Settings(addresses: [netAddress.ipAddress], subnetMasks: [netAddress.maskAddress])
|
||||
// 设置路由表
|
||||
//NEIPv4Route.default()
|
||||
ipv4Settings.includedRoutes = routes.map { route in
|
||||
NEIPv4Route(destinationAddress: route.dstAddress, subnetMask: route.subnetMask)
|
||||
}
|
||||
networkSettings.ipv4Settings = ipv4Settings
|
||||
// 网卡配置设置必须成功
|
||||
do {
|
||||
try await self.provider.setTunnelNetworkSettings(networkSettings)
|
||||
self.startReader()
|
||||
|
||||
let ipMessage = NoticeMessage.ipAdress(ip: netAddress.ipAddress)
|
||||
await self.noticeClient?.send(data: ipMessage)
|
||||
|
||||
self.logger.log("[SDLContext] setTunnelNetworkSettings success, start read packet", level: .info)
|
||||
} catch let err {
|
||||
self.logger.log("[SDLContext] setTunnelNetworkSettings get error: \(err)", level: .error)
|
||||
exit(-1)
|
||||
}
|
||||
}
|
||||
|
||||
// 开始读取数据, 用单独的线程处理packetFlow
|
||||
private func startReader() {
|
||||
// 停止之前的任务
|
||||
@ -529,9 +528,9 @@ public class SDLContext: @unchecked Sendable {
|
||||
// 开启新的任务
|
||||
self.readTask = Task(priority: .high) {
|
||||
repeat {
|
||||
let (packets, numbers) = await self.provider.packetFlow.readPackets()
|
||||
for (data, number) in zip(packets, numbers) where number == 2 {
|
||||
await self.dealPacket(data: data)
|
||||
let packets = await self.providerActor.readPackets()
|
||||
for packet in packets {
|
||||
await self.dealPacket(data: packet)
|
||||
}
|
||||
} while true
|
||||
}
|
||||
@ -554,7 +553,7 @@ public class SDLContext: @unchecked Sendable {
|
||||
// 本地通讯, 目标地址是本地服务器的ip地址
|
||||
if dstIp == self.devAddr.netAddr {
|
||||
let nePacket = NEPacket(data: packet.data, protocolFamily: 2)
|
||||
self.provider.packetFlow.writePacketObjects([nePacket])
|
||||
await self.providerActor.writePackets(packets: [nePacket])
|
||||
return
|
||||
}
|
||||
|
||||
@ -581,16 +580,24 @@ public class SDLContext: @unchecked Sendable {
|
||||
return
|
||||
}
|
||||
|
||||
// 构造数据包
|
||||
var dataPacket = SDLData()
|
||||
dataPacket.networkID = self.devAddr.networkID
|
||||
dataPacket.srcMac = self.devAddr.mac
|
||||
dataPacket.dstMac = dstMac
|
||||
dataPacket.ttl = 255
|
||||
dataPacket.data = encodedPacket
|
||||
|
||||
// 通过session发送到对端
|
||||
if let session = await self.sessionManager.getSession(toAddress: dstMac) {
|
||||
self.logger.log("[SDLContext] send packet by session: \(session)", level: .debug)
|
||||
await self.udpHole?.sendPacket(context: self, session: session, data: encodedPacket)
|
||||
|
||||
await self.udpHoleActor?.send(type: .data, data: try! dataPacket.serializedData(), remoteAddress: session.natAddress)
|
||||
await self.flowTracer.inc(num: data.count, type: .p2p)
|
||||
}
|
||||
else {
|
||||
// 通过super_node进行转发
|
||||
await self.udpHole?.forwardPacket(context: self, dst_mac: dstMac, data: encodedPacket)
|
||||
let superAddress = self.config.stunSocketAddress
|
||||
await self.udpHoleActor?.send(type: .data, data: try! dataPacket.serializedData(), remoteAddress: superAddress)
|
||||
// 流量统计
|
||||
await self.flowTracer.inc(num: data.count, type: .forward)
|
||||
|
||||
@ -624,7 +631,10 @@ public class SDLContext: @unchecked Sendable {
|
||||
}
|
||||
|
||||
private func tryHole(request: RegisterRequest) async {
|
||||
guard let message = try? await self.superClient?.queryInfo(dst_mac: request.dstMac).get() else {
|
||||
var queryInfo = SDLQueryInfo()
|
||||
queryInfo.dstMac = request.dstMac
|
||||
|
||||
guard let message = try? await self.superClientActor?.request(type: .queryInfo, data: try queryInfo.serializedData()).get() else {
|
||||
return
|
||||
}
|
||||
|
||||
@ -635,7 +645,12 @@ public class SDLContext: @unchecked Sendable {
|
||||
if let remoteAddress = peerInfo.v4Info.socketAddress() {
|
||||
self.logger.log("[SDLContext] hole sock address: \(remoteAddress)", level: .debug)
|
||||
// 发送register包
|
||||
await self.udpHole?.sendRegister(remoteAddress: remoteAddress, networkId: request.networkId, srcMac: request.srcMac, dst_mac: request.dstMac)
|
||||
var register = SDLRegister()
|
||||
register.networkID = request.networkId
|
||||
register.srcMac = request.srcMac
|
||||
register.dstMac = request.dstMac
|
||||
|
||||
await self.udpHoleActor?.send(type: .register, data: try! register.serializedData(), remoteAddress: remoteAddress)
|
||||
} else {
|
||||
self.logger.log("[SDLContext] hole sock address is invalid: \(peerInfo.v4Info)", level: .warning)
|
||||
}
|
||||
@ -646,8 +661,8 @@ public class SDLContext: @unchecked Sendable {
|
||||
|
||||
deinit {
|
||||
self.rootTask?.cancel()
|
||||
self.udpHole = nil
|
||||
self.superClient = nil
|
||||
self.udpHoleActor = nil
|
||||
self.superClientActor = nil
|
||||
self.dnsClient = nil
|
||||
}
|
||||
|
||||
@ -678,3 +693,68 @@ public class SDLContext: @unchecked Sendable {
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// 网络类型探测
|
||||
extension SDLContext {
|
||||
// 定义nat类型
|
||||
enum NatType: UInt8, Encodable {
|
||||
case blocked = 0
|
||||
case noNat = 1
|
||||
case fullCone = 2
|
||||
case portRestricted = 3
|
||||
case coneRestricted = 4
|
||||
case symmetric = 5
|
||||
}
|
||||
|
||||
// 获取当前所处的网络的nat类型
|
||||
func getNatType() async -> NatType {
|
||||
guard let udpHole = self.udpHoleActor else {
|
||||
return .blocked
|
||||
}
|
||||
|
||||
let addressArray = config.stunProbeSocketAddressArray
|
||||
// step1: ip1:port1 <---- ip1:port1
|
||||
guard let natAddress1 = await getNatAddress(udpHole, remoteAddress: addressArray[0][0], attr: .none) else {
|
||||
return .blocked
|
||||
}
|
||||
|
||||
// 网络没有在nat下
|
||||
if await natAddress1 == udpHole.localAddress {
|
||||
return .noNat
|
||||
}
|
||||
|
||||
// step2: ip2:port2 <---- ip2:port2
|
||||
guard let natAddress2 = await getNatAddress(udpHole, remoteAddress: addressArray[1][1], attr: .none) else {
|
||||
return .blocked
|
||||
}
|
||||
|
||||
// 如果natAddress2 的IP地址与上次回来的IP是不一样的，它就是对称型NAT; 这次的包也一定能发成功并收到
|
||||
// 如果ip地址变了，这说明{dstIp, dstPort, srcIp, srcPort}, 其中有一个变了；则用新的ip地址
|
||||
logger.log("[SDLNatProber] nat_address1: \(natAddress1), nat_address2: \(natAddress2)", level: .debug)
|
||||
if let ipAddress1 = natAddress1.ipAddress, let ipAddress2 = natAddress2.ipAddress, ipAddress1 != ipAddress2 {
|
||||
return .symmetric
|
||||
}
|
||||
|
||||
// step3: ip1:port1 <---- ip2:port2 (ip地址和port都变的情况)
|
||||
// 如果能收到的，说明是完全锥形 说明是IP地址限制锥型NAT，如果不能收到说明是端口限制锥型。
|
||||
if let natAddress3 = await getNatAddress(udpHole, remoteAddress: addressArray[0][0], attr: .peer) {
|
||||
logger.log("[SDLNatProber] nat_address1: \(natAddress1), nat_address2: \(natAddress2), nat_address3: \(natAddress3)", level: .debug)
|
||||
return .fullCone
|
||||
}
|
||||
|
||||
// step3: ip1:port1 <---- ip1:port2 (port改变情况)
|
||||
// 如果能收到的说明是IP地址限制锥型NAT，如果不能收到说明是端口限制锥型。
|
||||
if let natAddress4 = await getNatAddress(udpHole, remoteAddress: addressArray[0][0], attr: .port) {
|
||||
logger.log("[SDLNatProber] nat_address1: \(natAddress1), nat_address2: \(natAddress2), nat_address4: \(natAddress4)", level: .debug)
|
||||
return .coneRestricted
|
||||
} else {
|
||||
return .portRestricted
|
||||
}
|
||||
}
|
||||
|
||||
private func getNatAddress(_ udpHole: SDLUDPHoleActor, remoteAddress: SocketAddress, attr: SDLProbeAttr) async -> SocketAddress? {
|
||||
let stunProbeReply = try? await udpHole.stunProbe(remoteAddress: remoteAddress, attr: attr, timeout: 5)
|
||||
return stunProbeReply?.socketAddress()
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -1,77 +0,0 @@
|
||||
//
|
||||
// File.swift
|
||||
// sdlan
|
||||
//
|
||||
// Created by 安礼成 on 2025/7/14.
|
||||
//
|
||||
|
||||
import Foundation
|
||||
import NIOCore
|
||||
|
||||
// 网络类型探测器
|
||||
@available(macOS 14, *)
|
||||
struct SDLNatProber {
|
||||
|
||||
// 定义nat类型
|
||||
enum NatType: UInt8, Encodable {
|
||||
case blocked = 0
|
||||
case noNat = 1
|
||||
case fullCone = 2
|
||||
case portRestricted = 3
|
||||
case coneRestricted = 4
|
||||
case symmetric = 5
|
||||
}
|
||||
|
||||
// 获取当前所处的网络的nat类型
|
||||
static func getNatType(udpHole: SDLUDPHole?, config: SDLConfiguration, logger: SDLLogger) async -> NatType {
|
||||
guard let udpHole else {
|
||||
return .blocked
|
||||
}
|
||||
|
||||
let addressArray = config.stunProbeSocketAddressArray
|
||||
// step1: ip1:port1 <---- ip1:port1
|
||||
guard let natAddress1 = await getNatAddress(udpHole, remoteAddress: addressArray[0][0], attr: .none) else {
|
||||
return .blocked
|
||||
}
|
||||
|
||||
// 网络没有在nat下
|
||||
if await natAddress1 == udpHole.localAddress {
|
||||
return .noNat
|
||||
}
|
||||
|
||||
// step2: ip2:port2 <---- ip2:port2
|
||||
guard let natAddress2 = await getNatAddress(udpHole, remoteAddress: addressArray[1][1], attr: .none) else {
|
||||
return .blocked
|
||||
}
|
||||
|
||||
// 如果natAddress2 的IP地址与上次回来的IP是不一样的，它就是对称型NAT; 这次的包也一定能发成功并收到
|
||||
// 如果ip地址变了，这说明{dstIp, dstPort, srcIp, srcPort}, 其中有一个变了；则用新的ip地址
|
||||
logger.log("[SDLNatProber] nat_address1: \(natAddress1), nat_address2: \(natAddress2)", level: .debug)
|
||||
if let ipAddress1 = natAddress1.ipAddress, let ipAddress2 = natAddress2.ipAddress, ipAddress1 != ipAddress2 {
|
||||
return .symmetric
|
||||
}
|
||||
|
||||
// step3: ip1:port1 <---- ip2:port2 (ip地址和port都变的情况)
|
||||
// 如果能收到的，说明是完全锥形 说明是IP地址限制锥型NAT，如果不能收到说明是端口限制锥型。
|
||||
if let natAddress3 = await getNatAddress(udpHole, remoteAddress: addressArray[0][0], attr: .peer) {
|
||||
logger.log("[SDLNatProber] nat_address1: \(natAddress1), nat_address2: \(natAddress2), nat_address3: \(natAddress3)", level: .debug)
|
||||
return .fullCone
|
||||
}
|
||||
|
||||
// step3: ip1:port1 <---- ip1:port2 (port改变情况)
|
||||
// 如果能收到的说明是IP地址限制锥型NAT，如果不能收到说明是端口限制锥型。
|
||||
if let natAddress4 = await getNatAddress(udpHole, remoteAddress: addressArray[0][0], attr: .port) {
|
||||
logger.log("[SDLNatProber] nat_address1: \(natAddress1), nat_address2: \(natAddress2), nat_address4: \(natAddress4)", level: .debug)
|
||||
return .coneRestricted
|
||||
} else {
|
||||
return .portRestricted
|
||||
}
|
||||
}
|
||||
|
||||
private static func getNatAddress(_ udpHole: SDLUDPHole, remoteAddress: SocketAddress, attr: SDLProbeAttr) async -> SocketAddress? {
|
||||
let stunProbeReply = try? await udpHole.stunProbe(remoteAddress: remoteAddress, attr: attr, timeout: 5)
|
||||
|
||||
return stunProbeReply?.socketAddress()
|
||||
}
|
||||
|
||||
}
|
||||
@ -1,330 +0,0 @@
|
||||
//
|
||||
// SDLWebsocketClient.swift
|
||||
// Tun
|
||||
//
|
||||
// Created by 安礼成 on 2024/3/28.
|
||||
//
|
||||
|
||||
import Foundation
|
||||
import NIOCore
|
||||
import NIOPosix
|
||||
|
||||
// --MARK: 和SuperNode的客户端
|
||||
@available(macOS 14, *)
|
||||
actor SDLSuperClient {
|
||||
private let group = MultiThreadedEventLoopGroup(numberOfThreads: 1)
|
||||
private let asyncChannel: NIOAsyncChannel<ByteBuffer,ByteBuffer>
|
||||
private let (writeStream, writeContinuation) = AsyncStream.makeStream(of: TcpMessage.self, bufferingPolicy: .unbounded)
|
||||
private var callbackPromises: [UInt32:EventLoopPromise<SDLSuperInboundMessage>] = [:]
|
||||
|
||||
public let eventFlow: AsyncStream<SuperEvent>
|
||||
private let inboundContinuation: AsyncStream<SuperEvent>.Continuation
|
||||
|
||||
// id生成器
|
||||
var idGenerator = SDLIdGenerator(seed: 1)
|
||||
|
||||
private let logger: SDLLogger
|
||||
// 发送的消息格式
|
||||
struct TcpMessage {
|
||||
let packetId: UInt32
|
||||
let type: SDLPacketType
|
||||
let data: Data
|
||||
}
|
||||
|
||||
// 定义事件类型
|
||||
enum SuperEvent {
|
||||
case ready
|
||||
case event(SDLEvent)
|
||||
case command(UInt32, SDLCommand)
|
||||
}
|
||||
|
||||
init(host: String, port: Int, logger: SDLLogger) async throws {
|
||||
self.logger = logger
|
||||
|
||||
(self.eventFlow, self.inboundContinuation) = AsyncStream.makeStream(of: SuperEvent.self, bufferingPolicy: .unbounded)
|
||||
let bootstrap = ClientBootstrap(group: self.group)
|
||||
.channelOption(ChannelOptions.socketOption(.so_reuseaddr), value: 1)
|
||||
.channelInitializer { channel in
|
||||
return channel.pipeline.addHandlers([
|
||||
ByteToMessageHandler(FixedHeaderDecoder()),
|
||||
MessageToByteHandler(FixedHeaderEncoder())
|
||||
])
|
||||
}
|
||||
|
||||
self.asyncChannel = try await bootstrap.connect(host: host, port: port)
|
||||
.flatMapThrowing { channel in
|
||||
return try NIOAsyncChannel(wrappingChannelSynchronously: channel, configuration: .init(
|
||||
inboundType: ByteBuffer.self,
|
||||
outboundType: ByteBuffer.self
|
||||
))
|
||||
}
|
||||
.get()
|
||||
}
|
||||
|
||||
func start() async throws {
|
||||
try await withTaskCancellationHandler {
|
||||
try await self.asyncChannel.executeThenClose { inbound, outbound in
|
||||
self.inboundContinuation.yield(.ready)
|
||||
|
||||
try await withThrowingTaskGroup(of: Void.self) { group in
|
||||
group.addTask {
|
||||
defer {
|
||||
self.logger.log("[SDLSuperClient] inbound closed", level: .warning)
|
||||
}
|
||||
|
||||
for try await var packet in inbound {
|
||||
try Task.checkCancellation()
|
||||
|
||||
if let message = SDLSuperClientDecoder.decode(buffer: &packet) {
|
||||
self.logger.log("[SDLSuperTransport] read message: \(message)", level: .debug)
|
||||
switch message.packet {
|
||||
case .event(let event):
|
||||
self.inboundContinuation.yield(.event(event))
|
||||
case .command(let command):
|
||||
self.inboundContinuation.yield(.command(message.msgId, command))
|
||||
default:
|
||||
await self.fireCallback(message: message)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
group.addTask {
|
||||
defer {
|
||||
self.logger.log("[SDLSuperClient] outbound closed", level: .warning)
|
||||
}
|
||||
|
||||
for await message in self.writeStream {
|
||||
try Task.checkCancellation()
|
||||
|
||||
var buffer = self.asyncChannel.channel.allocator.buffer(capacity: message.data.count + 5)
|
||||
buffer.writeInteger(message.packetId, as: UInt32.self)
|
||||
buffer.writeBytes([message.type.rawValue])
|
||||
buffer.writeBytes(message.data)
|
||||
try await outbound.write(buffer)
|
||||
}
|
||||
}
|
||||
|
||||
// --MARK: 心跳机制
|
||||
group.addTask {
|
||||
defer {
|
||||
self.logger.log("[SDLSuperClient] ping task closed", level: .warning)
|
||||
}
|
||||
|
||||
while true {
|
||||
try Task.checkCancellation()
|
||||
await self.ping()
|
||||
try await Task.sleep(nanoseconds: 5 * 1_000_000_000)
|
||||
}
|
||||
}
|
||||
|
||||
// 迭代等待所有任务的退出, 第一个异常会被抛出
|
||||
if let _ = try await group.next() {
|
||||
group.cancelAll()
|
||||
}
|
||||
}
|
||||
}
|
||||
} onCancel: {
|
||||
self.inboundContinuation.finish()
|
||||
self.writeContinuation.finish()
|
||||
self.logger.log("[SDLSuperClient] withTaskCancellationHandler cancel")
|
||||
}
|
||||
}
|
||||
|
||||
// -- MARK: apis
|
||||
|
||||
func commandAck(packetId: UInt32, ack: SDLCommandAck) {
|
||||
guard let data = try? ack.serializedData() else {
|
||||
return
|
||||
}
|
||||
|
||||
self.send(type: .commandAck, packetId: packetId, data: data)
|
||||
}
|
||||
|
||||
func registerSuper(context ctx: SDLContext) throws -> EventLoopFuture<SDLSuperInboundMessage> {
|
||||
var registerSuper = SDLRegisterSuper()
|
||||
registerSuper.version = UInt32(ctx.config.version)
|
||||
registerSuper.clientID = ctx.config.clientId
|
||||
registerSuper.devAddr = ctx.devAddr
|
||||
registerSuper.pubKey = ctx.rsaCipher.pubKey
|
||||
registerSuper.token = ctx.config.token
|
||||
registerSuper.networkCode = ctx.config.networkCode
|
||||
registerSuper.hostname = ctx.config.hostname
|
||||
|
||||
NSLog("[SuperClient] register super request: \(registerSuper)")
|
||||
|
||||
let data = try! registerSuper.serializedData()
|
||||
|
||||
return self.write(type: .registerSuper, data: data)
|
||||
}
|
||||
|
||||
// 查询目标服务器的相关信息
|
||||
func queryInfo(dst_mac: Data) async throws -> EventLoopFuture<SDLSuperInboundMessage> {
|
||||
var queryInfo = SDLQueryInfo()
|
||||
queryInfo.dstMac = dst_mac
|
||||
|
||||
return self.write(type: .queryInfo, data: try! queryInfo.serializedData())
|
||||
}
|
||||
|
||||
func unregister(context ctx: SDLContext) throws {
|
||||
self.send(type: .unregisterSuper, packetId: 0, data: Data())
|
||||
}
|
||||
|
||||
func ping() {
|
||||
self.send(type: .ping, packetId: 0, data: Data())
|
||||
}
|
||||
|
||||
func flowReport(forwardNum: UInt32, p2pNum: UInt32, inboundNum: UInt32) {
|
||||
var flow = SDLFlows()
|
||||
flow.forwardNum = forwardNum
|
||||
flow.p2PNum = p2pNum
|
||||
flow.inboundNum = inboundNum
|
||||
|
||||
self.send(type: .flowTracer, packetId: 0, data: try! flow.serializedData())
|
||||
}
|
||||
|
||||
private func write(type: SDLPacketType, data: Data) -> EventLoopFuture<SDLSuperInboundMessage> {
|
||||
let packetId = idGenerator.nextId()
|
||||
let promise = self.asyncChannel.channel.eventLoop.makePromise(of: SDLSuperInboundMessage.self)
|
||||
self.callbackPromises[packetId] = promise
|
||||
|
||||
self.writeContinuation.yield(TcpMessage(packetId: packetId, type: type, data: data))
|
||||
|
||||
return promise.futureResult
|
||||
}
|
||||
|
||||
private func send(type: SDLPacketType, packetId: UInt32, data: Data) {
|
||||
self.writeContinuation.yield(TcpMessage(packetId: packetId, type: type, data: data))
|
||||
}
|
||||
|
||||
// 处理回调函数
|
||||
private func fireCallback(message: SDLSuperInboundMessage) {
|
||||
if let promise = self.callbackPromises[message.msgId] {
|
||||
self.asyncChannel.channel.eventLoop.execute {
|
||||
promise.succeed(message)
|
||||
}
|
||||
self.callbackPromises.removeValue(forKey: message.msgId)
|
||||
}
|
||||
}
|
||||
|
||||
deinit {
|
||||
try! group.syncShutdownGracefully()
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// --MARK: 编解码器
|
||||
private struct SDLSuperClientDecoder {
|
||||
// 消息格式为: <<MsgId:32, Type:8, Body/binary>>
|
||||
static func decode(buffer: inout ByteBuffer) -> SDLSuperInboundMessage? {
|
||||
guard let msgId = buffer.readInteger(as: UInt32.self),
|
||||
let type = buffer.readInteger(as: UInt8.self),
|
||||
let messageType = SDLPacketType(rawValue: type) else {
|
||||
return nil
|
||||
}
|
||||
|
||||
switch messageType {
|
||||
case .empty:
|
||||
return .init(msgId: msgId, packet: .empty)
|
||||
case .registerSuperAck:
|
||||
guard let bytes = buffer.readBytes(length: buffer.readableBytes),
|
||||
let registerSuperAck = try? SDLRegisterSuperAck(serializedBytes: bytes) else {
|
||||
return nil
|
||||
}
|
||||
return .init(msgId: msgId, packet: .registerSuperAck(registerSuperAck))
|
||||
|
||||
case .registerSuperNak:
|
||||
guard let bytes = buffer.readBytes(length: buffer.readableBytes),
|
||||
let registerSuperNak = try? SDLRegisterSuperNak(serializedBytes: bytes) else {
|
||||
return nil
|
||||
}
|
||||
return .init(msgId: msgId, packet: .registerSuperNak(registerSuperNak))
|
||||
|
||||
case .peerInfo:
|
||||
guard let bytes = buffer.readBytes(length: buffer.readableBytes),
|
||||
let peerInfo = try? SDLPeerInfo(serializedBytes: bytes) else {
|
||||
return nil
|
||||
}
|
||||
|
||||
return .init(msgId: msgId, packet: .peerInfo(peerInfo))
|
||||
case .pong:
|
||||
return .init(msgId: msgId, packet: .pong)
|
||||
|
||||
case .command:
|
||||
guard let commandVal = buffer.readInteger(as: UInt8.self),
|
||||
let command = SDLCommandType(rawValue: commandVal),
|
||||
let bytes = buffer.readBytes(length: buffer.readableBytes) else {
|
||||
return nil
|
||||
}
|
||||
|
||||
switch command {
|
||||
case .changeNetwork:
|
||||
guard let changeNetworkCommand = try? SDLChangeNetworkCommand(serializedBytes: bytes) else {
|
||||
return nil
|
||||
}
|
||||
|
||||
return .init(msgId: msgId, packet: .command(.changeNetwork(changeNetworkCommand)))
|
||||
}
|
||||
|
||||
case .event:
|
||||
guard let eventVal = buffer.readInteger(as: UInt8.self),
|
||||
let event = SDLEventType(rawValue: eventVal),
|
||||
let bytes = buffer.readBytes(length: buffer.readableBytes) else {
|
||||
return nil
|
||||
}
|
||||
|
||||
switch event {
|
||||
case .natChanged:
|
||||
guard let natChangedEvent = try? SDLNatChangedEvent(serializedBytes: bytes) else {
|
||||
return nil
|
||||
}
|
||||
return .init(msgId: msgId, packet: .event(.natChanged(natChangedEvent)))
|
||||
case .sendRegister:
|
||||
guard let sendRegisterEvent = try? SDLSendRegisterEvent(serializedBytes: bytes) else {
|
||||
return nil
|
||||
}
|
||||
return .init(msgId: msgId, packet: .event(.sendRegister(sendRegisterEvent)))
|
||||
case .networkShutdown:
|
||||
guard let networkShutdownEvent = try? SDLNetworkShutdownEvent(serializedBytes: bytes) else {
|
||||
return nil
|
||||
}
|
||||
return .init(msgId: msgId, packet: .event(.networkShutdown(networkShutdownEvent)))
|
||||
}
|
||||
|
||||
default:
|
||||
return nil
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private final class FixedHeaderEncoder: MessageToByteEncoder, @unchecked Sendable {
|
||||
typealias InboundIn = ByteBuffer
|
||||
typealias InboundOut = ByteBuffer
|
||||
|
||||
func encode(data: ByteBuffer, out: inout ByteBuffer) throws {
|
||||
let len = data.readableBytes
|
||||
out.writeInteger(UInt16(len))
|
||||
out.writeBytes(data.readableBytesView)
|
||||
}
|
||||
}
|
||||
|
||||
private final class FixedHeaderDecoder: ByteToMessageDecoder, @unchecked Sendable {
|
||||
typealias InboundIn = ByteBuffer
|
||||
typealias InboundOut = ByteBuffer
|
||||
|
||||
func decode(context: ChannelHandlerContext, buffer: inout ByteBuffer) throws -> DecodingState {
|
||||
guard let len = buffer.getInteger(at: buffer.readerIndex, endianness: .big, as: UInt16.self) else {
|
||||
return .needMoreData
|
||||
}
|
||||
|
||||
if buffer.readableBytes >= len + 2 {
|
||||
buffer.moveReaderIndex(forwardBy: 2)
|
||||
if let bytes = buffer.readBytes(length: Int(len)) {
|
||||
context.fireChannelRead(self.wrapInboundOut(ByteBuffer(bytes: bytes)))
|
||||
}
|
||||
return .continue
|
||||
} else {
|
||||
return .needMoreData
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1,286 +0,0 @@
|
||||
//
|
||||
// SDLanServer.swift
|
||||
// Tun
|
||||
//
|
||||
// Created by 安礼成 on 2024/1/31.
|
||||
//
|
||||
|
||||
import Foundation
|
||||
import NIOCore
|
||||
import NIOPosix
|
||||
|
||||
// 处理和sn-server服务器之间的通讯
|
||||
@available(macOS 14, *)
|
||||
actor SDLUDPHole {
|
||||
private let group = MultiThreadedEventLoopGroup(numberOfThreads: 1)
|
||||
private let asyncChannel: NIOAsyncChannel<AddressedEnvelope<ByteBuffer>, AddressedEnvelope<ByteBuffer>>
|
||||
private let (writeStream, writeContinuation) = AsyncStream.makeStream(of: UDPMessage.self, bufferingPolicy: .unbounded)
|
||||
|
||||
private var cookieGenerator = SDLIdGenerator(seed: 1)
|
||||
private var promises: [UInt32:EventLoopPromise<SDLStunProbeReply>] = [:]
|
||||
public var localAddress: SocketAddress?
|
||||
|
||||
public let eventFlow: AsyncStream<UDPEvent>
|
||||
private let eventContinuation: AsyncStream<UDPEvent>.Continuation
|
||||
|
||||
private let logger: SDLLogger
|
||||
|
||||
struct UDPMessage {
|
||||
let remoteAddress: SocketAddress
|
||||
let type: SDLPacketType
|
||||
let data: Data
|
||||
}
|
||||
|
||||
// 定义事件类型
|
||||
enum UDPEvent {
|
||||
case ready
|
||||
case message(SocketAddress, SDLHoleInboundMessage)
|
||||
case data(SDLData)
|
||||
}
|
||||
|
||||
// 启动函数
|
||||
init(logger: SDLLogger) async throws {
|
||||
self.logger = logger
|
||||
|
||||
(self.eventFlow, self.eventContinuation) = AsyncStream.makeStream(of: UDPEvent.self, bufferingPolicy: .unbounded)
|
||||
|
||||
let bootstrap = DatagramBootstrap(group: group)
|
||||
.channelOption(ChannelOptions.socketOption(.so_reuseaddr), value: 1)
|
||||
|
||||
self.asyncChannel = try await bootstrap.bind(host: "0.0.0.0", port: 0)
|
||||
.flatMapThrowing { channel in
|
||||
return try NIOAsyncChannel(wrappingChannelSynchronously: channel, configuration: .init(
|
||||
inboundType: AddressedEnvelope<ByteBuffer>.self,
|
||||
outboundType: AddressedEnvelope<ByteBuffer>.self
|
||||
))
|
||||
}
|
||||
.get()
|
||||
|
||||
self.localAddress = self.asyncChannel.channel.localAddress
|
||||
self.logger.log("[UDPHole] started and listening on: \(self.localAddress!)", level: .debug)
|
||||
}
|
||||
|
||||
func start() async throws {
|
||||
try await withTaskCancellationHandler {
|
||||
try await self.asyncChannel.executeThenClose {inbound, outbound in
|
||||
self.eventContinuation.yield(.ready)
|
||||
try await withThrowingTaskGroup(of: Void.self) { group in
|
||||
group.addTask {
|
||||
defer {
|
||||
self.logger.log("[SDLUDPHole] inbound closed", level: .warning)
|
||||
}
|
||||
|
||||
for try await envelope in inbound {
|
||||
try Task.checkCancellation()
|
||||
|
||||
var buffer = envelope.data
|
||||
let remoteAddress = envelope.remoteAddress
|
||||
do {
|
||||
if let message = try Self.decode(buffer: &buffer) {
|
||||
switch message {
|
||||
case .data(let data):
|
||||
self.logger.log("[SDLUDPHole] read data: \(data.format()), from: \(remoteAddress)", level: .debug)
|
||||
self.eventContinuation.yield(.data(data))
|
||||
case .stunProbeReply(let probeReply):
|
||||
// 执行并移除回调
|
||||
await self.trigger(probeReply: probeReply)
|
||||
default:
|
||||
self.eventContinuation.yield(.message(remoteAddress, message))
|
||||
}
|
||||
} else {
|
||||
self.logger.log("[SDLUDPHole] decode message, get null", level: .warning)
|
||||
}
|
||||
} catch let err {
|
||||
self.logger.log("[SDLUDPHole] decode message, get error: \(err)", level: .warning)
|
||||
throw err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
group.addTask {
|
||||
defer {
|
||||
self.logger.log("[SDLUDPHole] outbound closed", level: .warning)
|
||||
}
|
||||
|
||||
for await message in self.writeStream {
|
||||
try Task.checkCancellation()
|
||||
|
||||
var buffer = self.asyncChannel.channel.allocator.buffer(capacity: message.data.count + 1)
|
||||
buffer.writeBytes([message.type.rawValue])
|
||||
buffer.writeBytes(message.data)
|
||||
|
||||
let envelope = AddressedEnvelope<ByteBuffer>(remoteAddress: message.remoteAddress, data: buffer)
|
||||
try await outbound.write(envelope)
|
||||
}
|
||||
}
|
||||
|
||||
if let _ = try await group.next() {
|
||||
group.cancelAll()
|
||||
}
|
||||
}
|
||||
}
|
||||
} onCancel: {
|
||||
self.writeContinuation.finish()
|
||||
self.eventContinuation.finish()
|
||||
self.logger.log("[SDLUDPHole] withTaskCancellationHandler cancel")
|
||||
}
|
||||
}
|
||||
|
||||
// MARK: super_node apis
|
||||
|
||||
func stunRequest(context ctx: SDLContext) -> UInt32? {
|
||||
guard ctx.devAddr.networkID > 0 else {
|
||||
return nil
|
||||
}
|
||||
|
||||
let cookie = self.cookieGenerator.nextId()
|
||||
let remoteAddress = ctx.config.stunSocketAddress
|
||||
|
||||
var stunRequest = SDLStunRequest()
|
||||
stunRequest.cookie = cookie
|
||||
stunRequest.clientID = ctx.config.clientId
|
||||
stunRequest.networkID = ctx.devAddr.networkID
|
||||
stunRequest.ip = ctx.devAddr.netAddr
|
||||
stunRequest.mac = ctx.devAddr.mac
|
||||
stunRequest.natType = UInt32(ctx.natType.rawValue)
|
||||
|
||||
self.logger.log("[SDLUDPHole] stunRequest: \(remoteAddress), host: \(ctx.config.stunServers[0].host):\(ctx.config.stunServers[0].ports[0]), network_id: \(ctx.devAddr.networkID)", level: .debug)
|
||||
|
||||
self.send(remoteAddress: remoteAddress, type: .stunRequest, data: try! stunRequest.serializedData())
|
||||
|
||||
return cookie
|
||||
}
|
||||
|
||||
// 探测tun信息
|
||||
func stunProbe(remoteAddress: SocketAddress, attr: SDLProbeAttr = .none, timeout: Int = 5) async throws -> SDLStunProbeReply {
|
||||
return try await self._stunProbe(remoteAddress: remoteAddress, attr: attr, timeout: timeout).get()
|
||||
}
|
||||
|
||||
private func _stunProbe(remoteAddress: SocketAddress, attr: SDLProbeAttr = .none, timeout: Int) -> EventLoopFuture<SDLStunProbeReply> {
|
||||
let cookie = self.cookieGenerator.nextId()
|
||||
var stunProbe = SDLStunProbe()
|
||||
stunProbe.cookie = cookie
|
||||
stunProbe.attr = UInt32(attr.rawValue)
|
||||
self.send(remoteAddress: remoteAddress, type: .stunProbe, data: try! stunProbe.serializedData())
|
||||
self.logger.log("[SDLUDPHole] stunProbe: \(remoteAddress)", level: .debug)
|
||||
|
||||
let promise = self.asyncChannel.channel.eventLoop.makePromise(of: SDLStunProbeReply.self)
|
||||
self.promises[cookie] = promise
|
||||
|
||||
return promise.futureResult
|
||||
}
|
||||
|
||||
private func trigger(probeReply: SDLStunProbeReply) {
|
||||
let id = probeReply.cookie
|
||||
// 执行并移除回调
|
||||
if let promise = self.promises[id] {
|
||||
self.asyncChannel.channel.eventLoop.execute {
|
||||
promise.succeed(probeReply)
|
||||
}
|
||||
self.promises.removeValue(forKey: id)
|
||||
}
|
||||
}
|
||||
|
||||
// MARK: client-client apis
|
||||
|
||||
// 发送数据包到其他session
|
||||
func sendPacket(context ctx: SDLContext, session: Session, data: Data) {
|
||||
let remoteAddress = session.natAddress
|
||||
|
||||
var dataPacket = SDLData()
|
||||
dataPacket.networkID = ctx.devAddr.networkID
|
||||
dataPacket.srcMac = ctx.devAddr.mac
|
||||
dataPacket.dstMac = session.dstMac
|
||||
dataPacket.ttl = 255
|
||||
dataPacket.data = data
|
||||
if let packet = try? dataPacket.serializedData() {
|
||||
self.logger.log("[SDLUDPHole] sendPacket: \(remoteAddress), count: \(packet.count)", level: .debug)
|
||||
self.send(remoteAddress: remoteAddress, type: .data, data: packet)
|
||||
}
|
||||
}
|
||||
|
||||
// 通过sn服务器转发数据包, data已经是加密过后的数据
|
||||
func forwardPacket(context ctx: SDLContext, dst_mac: Data, data: Data) {
|
||||
let remoteAddress = ctx.config.stunSocketAddress
|
||||
|
||||
var dataPacket = SDLData()
|
||||
dataPacket.networkID = ctx.devAddr.networkID
|
||||
dataPacket.srcMac = ctx.devAddr.mac
|
||||
dataPacket.dstMac = dst_mac
|
||||
dataPacket.ttl = 255
|
||||
dataPacket.data = data
|
||||
|
||||
if let packet = try? dataPacket.serializedData() {
|
||||
self.logger.log("[SDLContext] forward packet, remoteAddress: \(remoteAddress), data size: \(packet.count)", level: .debug)
|
||||
self.send(remoteAddress: remoteAddress, type: .data, data: packet)
|
||||
}
|
||||
}
|
||||
|
||||
// 发送register包
|
||||
func sendRegister(remoteAddress: SocketAddress, networkId: UInt32, srcMac: Data, dst_mac: Data) {
|
||||
var register = SDLRegister()
|
||||
register.networkID = networkId
|
||||
register.srcMac = srcMac
|
||||
register.dstMac = dst_mac
|
||||
|
||||
if let packet = try? register.serializedData() {
|
||||
self.logger.log("[SDLUDPHole] SendRegister: \(remoteAddress), src_mac: \(LayerPacket.MacAddress.description(data: srcMac)), dst_mac: \(LayerPacket.MacAddress.description(data: dst_mac))", level: .debug)
|
||||
self.send(remoteAddress: remoteAddress, type: .register, data: packet)
|
||||
}
|
||||
}
|
||||
|
||||
// 回复registerAck
|
||||
func sendRegisterAck(context ctx: SDLContext, remoteAddress: SocketAddress, dst_mac: Data) {
|
||||
var registerAck = SDLRegisterAck()
|
||||
registerAck.networkID = ctx.devAddr.networkID
|
||||
registerAck.srcMac = ctx.devAddr.mac
|
||||
registerAck.dstMac = dst_mac
|
||||
|
||||
if let packet = try? registerAck.serializedData() {
|
||||
self.logger.log("[SDLUDPHole] SendRegisterAck: \(remoteAddress), \(registerAck)", level: .debug)
|
||||
self.send(remoteAddress: remoteAddress, type: .registerAck, data: packet)
|
||||
}
|
||||
}
|
||||
|
||||
// 处理写入逻辑
|
||||
private func send(remoteAddress: SocketAddress, type: SDLPacketType, data: Data) {
|
||||
let message = UDPMessage(remoteAddress: remoteAddress, type: type, data: data)
|
||||
self.writeContinuation.yield(message)
|
||||
}
|
||||
|
||||
//--MARK: 编解码器
|
||||
private static func decode(buffer: inout ByteBuffer) throws -> SDLHoleInboundMessage? {
|
||||
guard let type = buffer.readInteger(as: UInt8.self),
|
||||
let packetType = SDLPacketType(rawValue: type),
|
||||
let bytes = buffer.readBytes(length: buffer.readableBytes) else {
|
||||
return nil
|
||||
}
|
||||
|
||||
switch packetType {
|
||||
case .data:
|
||||
let dataPacket = try SDLData(serializedBytes: bytes)
|
||||
return .data(dataPacket)
|
||||
case .register:
|
||||
let registerPacket = try SDLRegister(serializedBytes: bytes)
|
||||
return .register(registerPacket)
|
||||
case .registerAck:
|
||||
let registerAck = try SDLRegisterAck(serializedBytes: bytes)
|
||||
return .registerAck(registerAck)
|
||||
case .stunReply:
|
||||
let stunReply = try SDLStunReply(serializedBytes: bytes)
|
||||
return .stunReply(stunReply)
|
||||
case .stunProbeReply:
|
||||
let stunProbeReply = try SDLStunProbeReply(serializedBytes: bytes)
|
||||
return .stunProbeReply(stunProbeReply)
|
||||
default:
|
||||
return nil
|
||||
}
|
||||
}
|
||||
|
||||
deinit {
|
||||
try? self.group.syncShutdownGracefully()
|
||||
self.writeContinuation.finish()
|
||||
self.eventContinuation.finish()
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user