c# 下实现ping 命令操作

1>通过.net提供的类实现

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Diagnostics;
using System.Net.NetworkInformation;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Ping ping = new Ping();
            Console.WriteLine(ping.Send("192.168.0.33").Status);
            Console.Read();
        }       
    }

}

2>同过调用cmd 的ping实现

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Diagnostics;
using System.Net.NetworkInformation;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(PingByProcess("192.168.0.33"));
            Console.Read();
        }

         static string PingByProcess(string ip)
        {
            using (Process p = new Process())
            {
                p.StartInfo.FileName = "cmd.exe";
                p.StartInfo.UseShellExecute = false;
                p.StartInfo.RedirectStandardInput = true;
                p.StartInfo.RedirectStandardOutput = true;
                p.StartInfo.RedirectStandardError = true;
                p.StartInfo.CreateNoWindow = true;

                p.Start();
                p.StandardInput.WriteLine(string.Format("ping -n 1 {0}", ip));
                return p.StandardOutput.ReadToEnd();
            }
        }       
    }

}

3>利用原始Socket套接字，实现ICMP协议。

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


public class PingHelp
{
    const int SOCKET_ERROR = -1;
    const int ICMP_ECHO = 8;

    public string PingHost(string host)
    {
        // 声明 IPHostEntry 
        IPHostEntry ServerHE, fromHE;
        int nBytes = 0;
        int dwStart = 0, dwStop = 0;

        //初始化ICMP的Socket 
        Socket socket =
         new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);
        socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendTimeout, 1000);
        // 得到Server EndPoint 
        try
        {
            ServerHE = Dns.GetHostByName(host);
        }
        catch (Exception)
        {

            return "没有发现主机";
        }

        // 把 Server IP_EndPoint转换成EndPoint 
        IPEndPoint ipepServer = new IPEndPoint(ServerHE.AddressList[0], 0);
        EndPoint epServer = (ipepServer);

        // 设定客户机的接收Endpoint 
        fromHE = Dns.GetHostByName(Dns.GetHostName());
        IPEndPoint ipEndPointFrom = new IPEndPoint(fromHE.AddressList[0], 0);
        EndPoint EndPointFrom = (ipEndPointFrom);

        int PacketSize = 0;
        IcmpPacket packet = new IcmpPacket();

        // 构建要发送的包 
        packet.Type = ICMP_ECHO; //8 
        packet.SubCode = 0;
        packet.CheckSum = 0;
        packet.Identifier = 45;
        packet.SequenceNumber = 0;
        int PingData = 24; // sizeof(IcmpPacket) - 8; 
        packet.Data = new Byte[PingData];

        // 初始化Packet.Data 
        for (int i = 0; i < PingData; i++)
        {
            packet.Data[i] = (byte)'#';
        }

        //Variable to hold the total Packet size 
        PacketSize = 32;
        Byte[] icmp_pkt_buffer = new Byte[PacketSize];
        Int32 Index = 0;
        //again check the packet size 
        Index = Serialize(
         packet,
         icmp_pkt_buffer,
         PacketSize,
         PingData);
        //if there is a error report it 
        if (Index == -1)
        {
            return "Error Creating Packet";

        }
        // convert into a UInt16 array 

        //Get the Half size of the Packet 
        Double double_length = Convert.ToDouble(Index);
        Double dtemp = Math.Ceiling(double_length / 2);
        int cksum_buffer_length = Index / 2;
        //Create a Byte Array 
        UInt16[] cksum_buffer = new UInt16[cksum_buffer_length];
        //Code to initialize the Uint16 array 
        int icmp_header_buffer_index = 0;
        for (int i = 0; i < cksum_buffer_length; i++)
        {
            cksum_buffer[i] =
             BitConverter.ToUInt16(icmp_pkt_buffer, icmp_header_buffer_index);
            icmp_header_buffer_index += 2;
        }
        //Call a method which will return a checksum 
        UInt16 u_cksum = checksum(cksum_buffer, cksum_buffer_length);
        //Save the checksum to the Packet 
        packet.CheckSum = u_cksum;

        // Now that we have the checksum, serialize the packet again 
        Byte[] sendbuf = new Byte[PacketSize];
        //again check the packet size 
        Index = Serialize(
         packet,
         sendbuf,
         PacketSize,
         PingData);
        //if there is a error report it 
        if (Index == -1)
        {
            return "Error Creating Packet";

        }

        dwStart = System.Environment.TickCount; // Start timing 
        //send the Packet over the socket 
        if ((nBytes = socket.SendTo(sendbuf, PacketSize, 0, epServer)) == SOCKET_ERROR)
        {
            return "Socket Error: cannot send Packet";
        }
        // Initialize the buffers. The receive buffer is the size of the 
        // ICMP header plus the IP header (20 bytes) 
        Byte[] ReceiveBuffer = new Byte[256];
        nBytes = 0;
        //Receive the bytes 
        bool recd = false;
        int timeout = 0;

        //loop for checking the time of the server responding 
        while (!recd)
        {
            nBytes = socket.ReceiveFrom(ReceiveBuffer, 256, 0, ref EndPointFrom);
            if (nBytes == SOCKET_ERROR)
            {
                return "主机没有响应";

            }
            else if (nBytes > 0)
            {
                dwStop = System.Environment.TickCount - dwStart; // stop timing 
                return "Reply from " + epServer.ToString() + " in "
                + dwStop + "ms.  Received: " + nBytes + " Bytes.";

            }
            timeout = System.Environment.TickCount - dwStart;
            if (timeout > 1000)
            {
                return "超时";
            }
        }

        //close the socket 
        socket.Close();
        return "";
    }
    /// <summary> 
    ///  This method get the Packet and calculates the total size 
    ///  of the Pack by converting it to byte array 
    /// </summary> 
    public static Int32 Serialize(IcmpPacket packet, Byte[] Buffer,
     Int32 PacketSize, Int32 PingData)
    {
        Int32 cbReturn = 0;
        // serialize the struct into the array 
        int Index = 0;

        Byte[] b_type = new Byte[1];
        b_type[0] = (packet.Type);

        Byte[] b_code = new Byte[1];
        b_code[0] = (packet.SubCode);

        Byte[] b_cksum = BitConverter.GetBytes(packet.CheckSum);
        Byte[] b_id = BitConverter.GetBytes(packet.Identifier);
        Byte[] b_seq = BitConverter.GetBytes(packet.SequenceNumber);

        Array.Copy(b_type, 0, Buffer, Index, b_type.Length);
        Index += b_type.Length;

        Array.Copy(b_code, 0, Buffer, Index, b_code.Length);
        Index += b_code.Length;

        Array.Copy(b_cksum, 0, Buffer, Index, b_cksum.Length);
        Index += b_cksum.Length;

        Array.Copy(b_id, 0, Buffer, Index, b_id.Length);
        Index += b_id.Length;

        Array.Copy(b_seq, 0, Buffer, Index, b_seq.Length);
        Index += b_seq.Length;

        // copy the data 
        Array.Copy(packet.Data, 0, Buffer, Index, PingData);
        Index += PingData;
        if (Index != PacketSize/* sizeof(IcmpPacket)  */)
        {
            cbReturn = -1;
            return cbReturn;
        }

        cbReturn = Index;
        return cbReturn;
    }
    /// <summary> 
    ///  This Method has the algorithm to make a checksum 
    /// </summary> 
    public static UInt16 checksum(UInt16[] buffer, int size)
    {
        Int32 cksum = 0;
        int counter;
        counter = 0;

        while (size > 0)
        {
            UInt16 val = buffer[counter];

            cksum += buffer[counter];
            counter += 1;
            size -= 1;
        }

        cksum = (cksum >> 16) + (cksum & 0xffff);
        cksum += (cksum >> 16);
        return (UInt16)(~cksum);
    }
}
/// 类结束 
/// <summary> 
///  Class that holds the Pack information 
/// </summary> 
public class IcmpPacket
{
    public Byte Type;    // type of message 
    public Byte SubCode;    // type of sub code 
    public UInt16 CheckSum;   // ones complement checksum of struct 
    public UInt16 Identifier;      // identifier 
    public UInt16 SequenceNumber;     // sequence number 
    public Byte[] Data;

} // class IcmpPacket 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Diagnostics;
using System.Net.NetworkInformation;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            PingHelp p = new PingHelp();
            Console.WriteLine(p.PingHost("192.168.0.120"));
            Console.Read();
        }       
    }

}

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