111 lines
3.4 KiB
Swift
111 lines
3.4 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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// dstMac
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private var coolingDown: Set<Data> = []
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private let cooldown: Duration = .seconds(5)
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private var udpHole: SDLUDPHole
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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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// 处理holer
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private var logger: SDLLogger
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private var querySocketAddress: SocketAddress
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nonisolated private let(requestStream, requestContinuation) = AsyncStream.makeStream(of: RegisterRequest.self, bufferingPolicy: .unbounded)
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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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init(udpHole: SDLUDPHole, querySocketAddress: SocketAddress, logger: SDLLogger) {
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self.udpHole = udpHole
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self.querySocketAddress = querySocketAddress
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self.logger = logger
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}
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nonisolated func submitRegisterRequest(request: RegisterRequest) {
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self.requestContinuation.yield(request)
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}
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func startConsuming() async {
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for await request in self.requestStream {
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self.submitRegisterRequest(request: request)
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}
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}
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private func handleRegisterRequest(request: RegisterRequest) {
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let dstMac = request.dstMac
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guard !coolingDown.contains(dstMac) else {
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return
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}
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// 触发一次打洞
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coolingDown.insert(dstMac)
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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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Task {
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await self.tryHole(pktId: pktId, request: request)
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// 启动冷却期
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try? await Task.sleep(for: .seconds(5))
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self.endCooldown(for: dstMac)
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self.removePendingRequest(for: pktId)
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}
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}
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func handlePeerInfo(peerInfo: SDLPeerInfo) async {
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if let request = pendingRequests.removeValue(forKey: peerInfo.pktID) {
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if let remoteAddress = peerInfo.v4Info.socketAddress() {
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self.logger.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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self.udpHole.send(type: .register, data: try! register.serializedData(), remoteAddress: remoteAddress)
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} else {
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self.logger.log("[SDLContext] hole sock address is invalid: \(peerInfo.v4Info)", level: .warning)
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}
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}
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}
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private func endCooldown(for key: Data) {
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self.coolingDown.remove(key)
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}
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private func removePendingRequest(for pktId: UInt32) {
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self.pendingRequests.removeValue(forKey: pktId)
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}
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private func tryHole(pktId: UInt32, request: RegisterRequest) async {
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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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self.udpHole.send(type: .queryInfo, data: queryData, remoteAddress: self.querySocketAddress)
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}
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}
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}
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