using Apewer; using System; using System.Collections.Generic; using System.Net; using System.Net.Sockets; using System.Text; using System.Threading; namespace Apewer.Network { /// <summary>UDP 服务端。</summary> public class UdpServer : IDisposable { /// <summary>释放资源。</summary> public void Dispose() { Quit(); } private Thread _thread = null; private System.Net.Sockets.UdpClient _udp = null; private string _address = "0.0.0.0"; private int _port = 0; /// <summary>Exception。</summary> public Event<Exception> Excepted { get; set; } /// <summary>服务端已启动。</summary> public Event Started { get; set; } /// <summary>服务端已关闭。</summary> public Event Quitted { get; set; } /// <summary>已收到客户端数据。</summary> public Event<SocketReceived> Received { get; set; } /// <summary>构造函数。</summary> public UdpServer() { } /// <summary>服务端是否正在运行。</summary> public bool Alive { get { return (_thread != null) ? _thread.IsAlive : false; } } /// <summary>指定监听地址,默认为 0.0.0.0。</summary> public string Address { get { return _address; } set { if (!Alive) _address = string.IsNullOrEmpty(value) ? "" : value; } } /// <summary>获取或设置服务端端口。</summary> public int Port { get { return _port; } set { int vp = value; if (vp < 0) vp = 0; if (vp > 65535) vp = 65535; if (!Alive) _port = vp; } } /// <summary>启动服务端。</summary> public void Start() { Quit(); var isIP = NetworkUtility.IsIP(_address); if (isIP && (Port > 0)) { _thread = new Thread(Listener); _thread.IsBackground = true; _thread.Start(); } } /// <summary>关闭服务端。</summary> public void Quit() { if (_thread != null) { if (_thread.IsAlive) _thread.Abort(); _thread = null; } if (_udp != null) { _udp.Close(); _udp = null; Quitted?.Invoke(this); } } private void Listener() { try { var ep = new IPEndPoint(IPAddress.Any, Port); _udp = new System.Net.Sockets.UdpClient(ep); Started?.Invoke(this); while (true) { var bytes = _udp.Receive(ref ep); if ((Received != null) && (bytes.Length > 0)) { var ip = ep.Address.ToString(); var port = ep.Port; Received?.Invoke(this, new SocketReceived(ip, ep.Port, bytes)); } // Thread.Sleep(1); } } catch (Exception ex) { if (Excepted != null) Excepted(this, ex); } Quitted.Invoke(this); } } }