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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);
}
}
}