关于dns转发的疑问 about nekit HOT 15 CLOSED

override func startTunnel(options: [String : NSObject]?, completionHandler: @escaping (Error?) -> Void) {
        
        let s5AdapterFactory = SOCKS5AdapterFactory(serverHost: "192.168.1.111", serverPort: 9287)
        let allRule = AllRule(adapterFactory: s5AdapterFactory)
        RuleManager.currentManager = RuleManager(fromRules: [allRule], appendDirect: false)

        let networkSettings = NEPacketTunnelNetworkSettings(tunnelRemoteAddress: "8.8.8.8")
        networkSettings.mtu = 1500

        let ipv4Settings = NEIPv4Settings(addresses: ["192.169.89.1"], subnetMasks: ["255.255.255.0"])
        ipv4Settings.includedRoutes = [NEIPv4Route.default()]
        ipv4Settings.excludedRoutes = [
            NEIPv4Route(destinationAddress: "10.0.0.0", subnetMask: "255.0.0.0"),
            NEIPv4Route(destinationAddress: "100.64.0.0", subnetMask: "255.192.0.0"),
            NEIPv4Route(destinationAddress: "127.0.0.0", subnetMask: "255.0.0.0"),
            NEIPv4Route(destinationAddress: "169.254.0.0", subnetMask: "255.255.0.0"),
            NEIPv4Route(destinationAddress: "172.16.0.0", subnetMask: "255.240.0.0"),
            NEIPv4Route(destinationAddress: "192.168.0.0", subnetMask: "255.255.0.0"),
            NEIPv4Route(destinationAddress: "17.0.0.0", subnetMask: "255.0.0.0"),
        ]
        networkSettings.ipv4Settings = ipv4Settings


        if enablePacketProcessing {
            let DNSSettings = NEDNSSettings(servers: ["8.8.8.8"])
            DNSSettings.matchDomains = [""]
            DNSSettings.matchDomainsNoSearch = false
            networkSettings.dnsSettings = DNSSettings
            
            RawSocketFactory.TunnelProvider = self
        }

        setTunnelNetworkSettings(networkSettings) { error in
            guard error == nil else {
                completionHandler(error)
                return
            }

            if !self.started {
                // 下面的观察者要检查网络变化并重启服务
//                self.addObserver(self, forKeyPath: "defaultPath", options: .initial, context: nil)
                if #available(iOSApplicationExtension 10.0, *) {
                    DDLog.add(DDOSLogger.sharedInstance, with: DDLogLevel.verbose)
                    DDOSLogger.sharedInstance.logFormatter = LogFormatter()
                }
                Opt.MAXNWTCPSocketReadDataSize = 60 * 1024 - 1
            }

            if self.started {
                self.httpProxy.stop()
                try! self.httpProxy.start()
            } else {
                self.httpProxy = GCDHTTPProxyServer(address: IPAddress(fromString: "127.0.0.1"), port: 6152)
                try! self.httpProxy.start()
            }

            completionHandler(nil)

            if self.enablePacketProcessing {
                if self.started {
                    self.interface.stop()
                }
                if !self.started {
                    self.interface = TUNInterface(packetFlow: self.packetFlow)

                    let udpStack = UDPAssociateStack(serverHost: "192.168.1.111", serverPort: 9287)
                    self.interface.register(stack: udpStack)

                    let tcpStack = TCPStack.stack
                    tcpStack.proxyServer = self.httpProxy
                    self.interface.register(stack:tcpStack)

                    self.interface.start()
                }
            }
            self.started = true
        }
    }