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118 lines
4.5 KiB
118 lines
4.5 KiB
using Apewer.Internals;
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using System;
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using System.Collections.Generic;
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using System.Net;
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using System.Net.Sockets;
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using System.Text;
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namespace Apewer.Network
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{
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/// <summary>UDP 客户端。</summary>
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public static class UdpClient
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{
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/// <summary>向所有服务端广播数据。</summary>
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/// <param name="bytes">数据。</param>
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/// <param name="port">服务端端口。</param>
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public static bool Broadcast(byte[] bytes, int port)
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{
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if (bytes == null) return false;
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if (bytes.LongLength == 0) return false;
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if (port < 0) port = 0;
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if (port > 65535) port = 65535;
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try
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{
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var uc = new System.Net.Sockets.UdpClient();
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var ep = new IPEndPoint(IPAddress.Parse("255.255.255.255"), port);
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uc.EnableBroadcast = true;
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uc.Send(bytes, bytes.Length, ep);
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uc.Close();
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return true;
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}
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catch { return false; }
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}
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/// <summary>向指定服务端发送数据。</summary>
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/// <param name="ip">服务端 IP 地址。</param>
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/// <param name="port">服务端端口。</param>
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/// <param name="bytes">数据。</param>
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/// <param name="await">阻塞当前线程,等待服务端返回数据,指定 FALSE 将立刻返回 NULL 值。</param>
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/// <returns>服务器返回的数据。当通过 await 参数指定 FALSE 时,立刻返回 NULL 值。</returns>
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public static byte[] Send(string ip, int port, byte[] bytes, bool await = false)
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{
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if (bytes == null) return null;
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if (bytes.LongLength == 0) return null;
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if (port < 0) port = 0;
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if (port > 65535) port = 65535;
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try
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{
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var uc = new System.Net.Sockets.UdpClient();
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var ep = new IPEndPoint(IPAddress.Parse(ip), port);
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uc.EnableBroadcast = false;
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uc.Send(bytes, bytes.Length, ep);
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var received = null as byte[];
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if (await)
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{
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var rep = null as IPEndPoint;
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received = await ? uc.Receive(ref rep) : null;
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}
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uc.Close();
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return received;
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}
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catch { return null; }
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}
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/// <summary>向指定服务端发送数据。</summary>
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/// <param name="ip">服务端 IP 地址。</param>
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/// <param name="port">服务端端口。</param>
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/// <param name="bytes">数据。</param>
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/// <param name="await">阻塞当前线程,等待服务端返回数据,指定 FALSE 将立刻返回 NULL 值。</param>
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/// <returns>服务器返回的数据。当通过 await 参数指定 FALSE 时,立刻返回 NULL 值。</returns>
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public static byte[] Send(byte[] bytes, int port, string ip = "127.0.0.1", bool await = false)
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{
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return Send(ip, port, bytes, false);
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}
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/// <summary>向指定服务端发送数据。</summary>
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/// <param name="ip">服务端 IP 地址。</param>
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/// <param name="port">服务端端口。</param>
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/// <param name="bytes">数据。</param>
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/// <param name="await">阻塞当前线程,等待服务端返回数据,指定 FALSE 将立刻返回 NULL 值。</param>
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/// <returns>服务器返回的数据。当通过 await 参数指定 FALSE 时,立刻返回 NULL 值。</returns>
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public static byte[] Send(int port, byte[] bytes, string ip = "127.0.0.1", bool await = false)
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{
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return Send(ip, port, bytes, false);
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}
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/// <summary>唤醒局域网中拥有指定 MAC 地址的设备。</summary>
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/// <param name="mac">被唤醒设备的 MAC 地址,必须是长度为 6 的字节数组。</param>
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public static void WakeOnLan(byte[] mac)
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{
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if (mac.Length != 6) return;
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var uc = new System.Net.Sockets.UdpClient();
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uc.Connect(IPAddress.Broadcast, 65535);
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var pack = new List<byte>();
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// 前 6 字节为 0xFF。
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for (int i = 0; i < 6; i++) pack.Add(255);
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// 目标 MAC 地址重复 16 次。
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for (int i = 0; i < 16; i++)
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{
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for (int j = 0; j < 6; j++) pack.Add(mac[j]);
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}
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// 发送 102 字节数据。
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uc.Send(pack.ToArray(), pack.Count);
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uc.Close();
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}
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}
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}
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