Socket 异步接受网络广播代码,CSharp代码库,德仔网

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【CSharp】 Socket 异步接受网络广播
作者:zgke / 发布于2014/7/29/ 475

	必须设置SOCKET为低级操作模式

	 byte[] InByte = new byte[4] { 1, 0, 0, 0 };
	 byte[] OutByte = new byte[4];
	 int SIO_RCVALL = unchecked((int)0x98000001);
	 int ScoketCode = MySocket.IOControl(SIO_RCVALL, InByte, OutByte);
	 ScoketCode = OutByte[0] + OutByte[1] + OutByte[2] + OutByte[3];

	数据包的结构
	[StructLayout(LayoutKind.Explicit)]
	public struct IPHeader
	{
	 [FieldOffset(0)] public byte ip_verlen; //IP version and IP Header length Combined
	 [FieldOffset(1)] public byte ip_tos; //Type of Service
	 [FieldOffset(2)] public ushort ip_totallength; //Total Packet Length
	 [FieldOffset(4)] public ushort ip_id; //Unique ID
	 [FieldOffset(6)] public ushort ip_offset; //Flags and Offset
	 [FieldOffset(8)] public byte ip_ttl; //Time To Live
	 [FieldOffset(9)] public byte ip_protocol; //Protocol (TCP, UDP, ICMP, Etc.)
	 [FieldOffset(10)] public ushort ip_checksum; //IP Header Checksum
	 [FieldOffset(12)] public uint ip_srcaddr; //Source IP Address
	 [FieldOffset(16)] public uint ip_destaddr; //Destination IP Address
	}

	下面是全部代码

	using System;
	using System.Collections.Generic;
	using System.Text;
	using System.Net;
	using System.Net.Sockets;
	using System.Runtime.InteropServices;

	namespace ReceiveAll
	{
	 public class MyRawSocket
	 {
	 private IPAddress MyIP;
	 private bool RunRawSocket = false;
	 private Socket MySocket;

	 public MyRawSocket(IPAddress MyIPAddress)
	 {
	 MyIP = MyIPAddress;

	 MySocket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.IP);
	 MySocket.Blocking = false;
	 MySocket.Bind(new IPEndPoint(MyIPAddress, 0));

	 if (SetSocketIOControl() == false) return;
	 RunRawSocket = true;
	 }

	 private bool SetSocketIOControl()
	 {
	 bool ReturnBool = true;
	 try
	 {
	 MySocket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.HeaderIncluded, 1);
	 byte[] InByte = new byte[4] { 1, 0, 0, 0 };
	 byte[] OutByte = new byte[4];
	 int SIO_RCVALL = unchecked((int)0x98000001);
	 int ScoketCode = MySocket.IOControl(SIO_RCVALL, InByte, OutByte);
	 ScoketCode = OutByte[0] + OutByte[1] + OutByte[2] + OutByte[3];
	 if (ScoketCode != 0) ReturnBool = false;
	 }
	 catch (SocketException)
	 {
	 ReturnBool = false;
	 }
	 return ReturnBool;
	 }

	 public void Star()
	 {
	 byte[] Temp = new byte[0];
	 IAsyncResult StarAsyncResult = MySocket.BeginReceive(Temp, 0, 0, SocketFlags.None, new AsyncCallback(CallReceive), MySocket);
	 }
	 public void Stop()
	 {
	 RunRawSocket = false;
	 }

	 private void CallReceive(IAsyncResult ar)
	 {
	 Socket sock = (Socket)ar.AsyncState;
	 int ReceiveCount = sock.Available;

	 if (ReceiveCount != 0)
	 {
	 byte[] Data = new byte[ReceiveCount];
	 sock.Receive(Data);
	 AssayByte(Data);
	 }
	 if (RunRawSocket) Star();
	 }

	 /// <summary>
	 /// 分析数据
	 /// </summary>
	 /// <param name="Data"></param>
	 private void AssayByte(byte[] Data)
	 {
	 IPData MyData = new IPData();
	 if (Data.Length >= 24)
	 {

	 MyData.HeaderLength = (uint)(Data[0] & 0x0F) << 2;

	 MyData.Version = (uint)(Data[0] & 0xF0) >> 4;

	 switch (Data[9])
	 {
	 case 1: MyData.Protocol = "ICMP"; break;
	 case 2: MyData.Protocol = "IGMP"; break;
	 case 6: MyData.Protocol = "TCP"; break;
	 case 17: MyData.Protocol = "UDP"; break;
	 default: MyData.Protocol = "UNKNOWN"; break;
	 }

	 MyData.OriginationAddress = new IPAddress(new byte[] { Data[12], Data[13], Data[14], Data[15] });
	 MyData.DestinationAddress = new IPAddress(new byte[] { Data[16], Data[17], Data[18], Data[19] });

	 MyData.OriginationPort = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(new byte[] { Data[20], Data[21] }, 0));
	 MyData.DestinationPort = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(new byte[] { Data[22], Data[23] }, 0));

	 MyData.PacketLength = (uint)Data.Length;
	 MyData.MessageLength = (uint)Data.Length - MyData.HeaderLength;

	 MyData.PackByte = Data;
	 }
	 else
	 {
	 MyData.PackByte = Data;
	 }
	 if (Receive != null) Receive(MyData);
	 }

	 public delegate void ReceiveData(IPData ReceiveClass);
	 public event ReceiveData Receive;

	 public class IPData
	 {

	 private uint _HeaderLength = 0;
	 private uint _Version = 0;
	 private string _Protocol = "";
	 private IPAddress _OriginationAddress;
	 private IPAddress _DestinationAddress;
	 private short _OriginationPort = 0;
	 private short _DestinationPort = 0;
	 private uint _PacketLength = 0;
	 private uint _MessageLength = 0;
	 private byte[] _PackByte;
	 /// <summary>
	 /// IP头长度
	 /// </summary>
	 public uint HeaderLength { get { return _HeaderLength; } set { _HeaderLength = value; } }
	 /// <summary>
	 /// IP版本
	 /// </summary>
	 public uint Version { get { return _Version; } set { _Version = value; } }
	 /// <summary>
	 /// IP协议
	 /// </summary>
	 public string Protocol { get { return _Protocol; } set { _Protocol = value; } }
	 /// <summary>
	 /// 发送IP地址
	 /// </summary>
	 public IPAddress OriginationAddress { get { return _OriginationAddress; } set { _OriginationAddress = value; } }
	 /// <summary>
	 /// 接收IP地址
	 /// </summary>
	 public IPAddress DestinationAddress { get { return _DestinationAddress; } set { _DestinationAddress = value; } }
	 /// <summary>
	 /// 发送端口
	 /// </summary>
	 public short OriginationPort { get { return _OriginationPort; } set { _OriginationPort = value; } }
	 /// <summary>
	 /// 接收端口
	 /// </summary>
	 public short DestinationPort { get { return _DestinationPort; } set { _DestinationPort = value; } }
	 /// <summary>
	 /// 接收长度
	 /// </summary>
	 public uint PacketLength { get { return _PacketLength; } set { _PacketLength = value; } }
	 /// <summary>
	 /// 消息长度
	 /// </summary>
	 public uint MessageLength { get { return _MessageLength; } set { _MessageLength = value; } }

	 /// <summary>
	 /// 包数据
	 /// </summary>
	 public byte[] PackByte { get { return _PackByte; } set { _PackByte = value; } }

	 }

	 }
	}

	使用方式

	 MyRawSocket myRawSock;
	 private void MainForm_Load(object sender, System.EventArgs e)
	 {
	 myRawSock = new MyRawSocket(IPAddress.Parse("192.168.1.111"));
	 myRawSock.Receive += new MyRawSocket.ReceiveData(myRawSock_Receive);
	 }

	 void myRawSock_Receive(MyRawSocket.IPData ReceiveClass)
	 {
	 string Temp = ReceiveClass.OriginationAddress.ToString() + ":" + ReceiveClass.OriginationPort.ToString()+"/t";
	 Temp+=ReceiveClass.DestinationAddress.ToString() + ":" + ReceiveClass.DestinationPort.ToString()+"/t";
	 Temp+="{Size="+ReceiveClass.PackByte.Length.ToString()+"}";
	 this.Invoke((MethodInvoker)delegate { listBox1.Items.Add(Temp); });
	 }
	 private void button1_Click(object sender, System.EventArgs e)
	 {
	 myRawSock.Star();
	 }
试试其它关键字
　Socket　　异步接受　　网络广播　
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