简单记录一下工作开发VPN程序的步骤,主要逻辑在VPNManager文件中

1、创建扩展进程

1.png

2.png

3.png

2、扩展进程处理

创建完扩展进程程序中会多出一个Tunnel/PacketTunnelProvider.swift文件
PacketTunnelProvider.swift文件中的处理
2.1、VPN开启的回调

override func startTunnel(options: [String : NSObject]?, completionHandler: @escaping (Error?) -> Void) {
        let tunnelNetworkSettings = NEPacketTunnelNetworkSettings(tunnelRemoteAddress: "192.168.3.14")
        tunnelNetworkSettings.mtu = 1400
        tunnelNetworkSettings.ipv4Settings = NEIPv4Settings(addresses: ["10.10.10.10"], subnetMasks: ["255.255.255.255"])
        tunnelNetworkSettings.ipv4Settings!.includedRoutes = [NEIPv4Route.default()]
        
        let nedn = NEDNSSettings(servers: ["223.5.5.5"])
        nedn.matchDomains = [""]
        tunnelNetworkSettings.dnsSettings = nedn
        setTunnelNetworkSettings(tunnelNetworkSettings) { [self] error in
            if error==nil {
                completionHandler(nil)
                readPakcets()
            }else{
                completionHandler(error)
            }
        }
    }

2.2、VPN关闭的回调

override func stopTunnel(with reason: NEProviderStopReason, completionHandler: @escaping () -> Void) {
        connection?.cancel()
        completionHandler()
    }

2.3、网络数据的获取

func readPakcets() {
        packetFlow.readPackets { [self] packets, protocols in
            for packet in packets{
                //这里是拦截到的网络数据，根据业务需求进行处理
                
                //处理好的数据可以调用下边的方法重新写入手机
                //packetFlow.writePackets([packet!], withProtocols: [NSNumber(value: AF_INET)])
            }
            readPakcets()
        }
    }

3、VPNManager的使用
3.1、配置VPN

func saveVPNConfig() {
        VPNManager.share.delegate = self
        let vpnModel = VPNConfig(tunnelBundleId: "\(Bundle.main.bundleIdentifier!).Tunnel",
                                 serverAddress: "1010101010",
                                 serverPort: "54345",
                                 mtu: "1400",
                                 ip: "10.8.0.2",
                                 subnet: "255.255.255.0",
                                 dns: "8.8.8.8,8.4.4.4",
                                 vpnName: "VPNManager")
        VPNManager.share.configManager(vpnModel)
    }

3.2、开启VPN
VPNManager.share.startVPN()
3.3、关闭VPN
VPNManager.share.stopVPN()
3.4、VPN状态回调

func vpnStatusChange(status: NEVPNStatus) {
        switch vpnStatus {
        case .invalid:
            print("未配置")
        case .disconnected:
            print("未连接")
        case .connected:
            print("已连接")
        default:
            break
        }
    }

Deno地址：https://github.com/YuanMingyang/VPNManager.git