102 lines
2.9 KiB
Swift
102 lines
2.9 KiB
Swift
//
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// SDLPuncherActor.swift
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// Tun
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//
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// Created by 安礼成 on 2026/1/7.
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//
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import Foundation
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import NIOCore
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actor SDLPuncherActor {
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nonisolated private let cooldownInterval: TimeInterval = 5
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// dstMac
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private var coolingDown: [Data: (UInt32, Date)] = [:]
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private var pktId: UInt32 = 1
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// 提交后还没有响应的请求
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private var pendingRequests: [UInt32: RegisterRequest] = [:]
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private var cleanupTask: Task<Void, Never>?
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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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// 启动定时清理任务
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func start() {
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self.cleanupTask?.cancel()
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self.cleanupTask = Task {
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while !Task.isCancelled {
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try? await Task.sleep(for: .seconds(cooldownInterval))
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self.cleanExpiredCoolingDown()
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}
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}
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}
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func submitRegisterRequest(quicClient: SDLQUICClient?, request: RegisterRequest) {
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let dstMac = request.dstMac
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guard let quicClient, coolingDown[dstMac] == nil else {
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return
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}
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let pktId = self.nextPacketId()
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coolingDown[dstMac] = (pktId, Date().addingTimeInterval(cooldownInterval))
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// 触发一次打洞
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var queryInfo = SDLQueryInfo()
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queryInfo.pktID = pktId
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queryInfo.dstMac = request.dstMac
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self.pendingRequests[pktId] = request
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if let queryData = try? queryInfo.serializedData() {
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quicClient.send(type: .queryInfo, data: queryData)
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}
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}
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func handlePeerInfo(using udpHole: SDLUDPHole?, peerInfo: SDLPeerInfo) async {
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guard let udpHole, let request = pendingRequests.removeValue(forKey: peerInfo.pktID),
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let remoteAddress = try? await peerInfo.v4Info.socketAddress() else {
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return
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}
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SDLLogger.shared.log("[SDLContext] hole sock address: \(remoteAddress)", level: .debug)
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// 发送register包
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var register = SDLRegister()
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register.networkID = request.networkId
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register.srcMac = request.srcMac
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register.dstMac = request.dstMac
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if let registerData = try? register.serializedData() {
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udpHole.send(type: .register, data: registerData, remoteAddress: remoteAddress)
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}
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}
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private func nextPacketId() -> UInt32 {
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let pktId = self.pktId
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self.pktId &+= 1
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if self.pktId == 0 {
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self.pktId = 1
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}
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return pktId
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}
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private func cleanExpiredCoolingDown() {
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let date = Date()
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for (key, (pktId, expireAt)) in coolingDown {
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if expireAt < date {
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self.coolingDown.removeValue(forKey: key)
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self.pendingRequests.removeValue(forKey: pktId)
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}
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}
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}
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deinit {
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self.cleanupTask?.cancel()
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self.cleanupTask = nil
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}
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}
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