学步园

以下是源代码，建一个控制台程序，然后把代码Copy进去就可以了~~

using System;<br /> using System.Collections;<br /> using System.Data;<br /> using System.Net;<br /> using System.Net.Sockets;</p> <p>namespace PPing<br /> {<br /> /// <summary><br /> /// Summary description for Class.<br /> /// </summary><br /> /// Ping类<br /> class Ping<br /> {<br /> //声明常量<br /> const int SOCKET_ERROR = -1;<br /> const int ICMP_ECHO = 8;</p> <p> /// <summary><br /> /// The main entry point for the application.<br /> /// </summary><br /> [STAThread]<br /> // 程序入口<br /> static void Main(string[] args)<br /> {<br /> //<br /> // TODO: Add code to start application here<br /> //<br /> Ping p = new Ping();<br /> Console.WriteLine("请输入要 Ping 的IP或者主机名字：");<br /> string MyUrl = Console.ReadLine();<br /> Console.WriteLine("正在 Ping " + MyUrl + " ……");<br /> Console.Write(p.PingHost(MyUrl));<br /> Console.WriteLine();<br /> Console.ReadLine();<br /> }</p> <p> public string PingHost(string host)<br /> {<br /> // 声明 IPHostEntry<br /> IPHostEntry serverHE, fromHE;<br /> int nBytes = 0;<br /> int dwStart = 0, dwStop = 0;</p> <p> //初始化ICMP的Socket<br /> Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);<br /> socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendTimeout, 1000);<br /> // 得到Server EndPoint<br /> try<br /> {<br /> serverHE = Dns.GetHostByName(host);<br /> }<br /> catch(Exception)<br /> {<br /> return "没有发现主机";<br /> }</p> <p> // 把 Server IP_EndPoint转换成EndPoint<br /> IPEndPoint ipepServer = new IPEndPoint(serverHE.AddressList[0], 0);<br /> EndPoint epServer = (ipepServer);</p> <p> // 设定客户机的接收Endpoint<br /> fromHE = Dns.GetHostByName(Dns.GetHostName());<br /> IPEndPoint ipEndPointFrom = new IPEndPoint(fromHE.AddressList[0], 0);<br /> EndPoint EndPointFrom = (ipEndPointFrom);</p> <p> int PacketSize = 0;<br /> IcmpPacket packet = new IcmpPacket();</p> <p> // 构建要发送的包<br /> packet.Type = ICMP_ECHO; //8<br /> packet.SubCode = 0;<br /> packet.CheckSum = UInt16.Parse("0");<br /> packet.Identifier = UInt16.Parse("45");<br /> packet.SequenceNumber = UInt16.Parse("0");<br /> int PingData = 32; // sizeof(IcmpPacket) - 8;<br /> packet.Data = new Byte[PingData];</p> <p> // 初始化Packet.Data<br /> string Tempstr=@"http://xml.sz.luohuedu.net/xml/#";<br /> for (int i = 0; i < PingData; i++)<br /> {<br /> packet.Data[i] =(byte)Tempstr[i];<br /> }</p> <p> //Variable to hold the total Packet size<br /> PacketSize = PingData + 8;<br /> Byte [] icmp_pkt_buffer = new Byte[ PacketSize ];<br /> Int32 Index = 0;<br /> //Call a Method Serialize which counts<br /> //The total number of Bytes in the Packet<br /> Index = Serialize(<br /> packet,<br /> icmp_pkt_buffer,<br /> PacketSize,<br /> PingData );<br /> //Error in Packet Size<br /> if( Index == -1 )<br /> {<br /> return "Error Creating Packet";<br /> }</p> <p> // convert into a UInt16 array</p> <p> //Get the Half size of the Packet<br /> Double double_length = Convert.ToDouble(Index);<br /> Double dtemp = Math.Ceiling( double_length / 2);<br /> int cksum_buffer_length = Convert.ToInt32(dtemp);<br /> //Create a Byte Array<br /> UInt16 [] cksum_buffer = new UInt16[cksum_buffer_length];<br /> //Code to initialize the Uint16 array<br /> int icmp_header_buffer_index = 0;<br /> for( int i = 0; i < cksum_buffer_length; i++ )<br /> {<br /> cksum_buffer[i] =BitConverter.ToUInt16(icmp_pkt_buffer,icmp_header_buffer_index);<br /> icmp_header_buffer_index += 2;<br /> }<br /> //Call a method which will return a checksum<br /> UInt16 u_cksum = checksum(cksum_buffer, cksum_buffer_length);<br /> //Save the checksum to the Packet<br /> packet.CheckSum = u_cksum;</p> <p> // Now that we have the checksum, serialize the packet again<br /> Byte [] sendbuf = new Byte[ PacketSize ];<br /> //again check the packet size<br /> Index = Serialize(<br /> packet,<br /> sendbuf,<br /> PacketSize,<br /> PingData );<br /> //if there is a error report it<br /> if( Index == -1 )<br /> {<br /> return "Error Creating Packet";<br /> }</p> <p> dwStart = System.Environment.TickCount; // Start timing<br /> //send the Packet over the socket<br /> if ((nBytes = socket.SendTo(sendbuf, PacketSize, 0, epServer)) == SOCKET_ERROR)<br /> {<br /> return "Socket Error: cannot send Packet";<br /> }<br /> // Initialize the buffers. The receive buffer is the size of the<br /> // ICMP header plus the IP header (20 bytes)<br /> Byte [] ReceiveBuffer = new Byte[256];<br /> nBytes = 0;<br /> //Receive the bytes<br /> bool recd =false ;<br /> int timeout=0 ;</p> <p> //loop for checking the time of the server responding<br /> while(!recd)<br /> {<br /> nBytes = socket.ReceiveFrom(ReceiveBuffer, 256, 0, ref EndPointFrom);<br /> if (nBytes == SOCKET_ERROR)<br /> {<br /> return "主机没有响应" ;</p> <p> }<br /> else if(nBytes>0)<br /> {<br /> dwStop = System.Environment.TickCount - dwStart; // stop timing<br /> return "Reply from "+epServer.ToString()+" in "<br /> +dwStop+"ms. Received: "+nBytes+ " Bytes.";<br /> }<br /> timeout=System.Environment.TickCount - dwStart;<br /> if(timeout>1000)<br /> {<br /> return "超时" ;<br /> }<br /> }</p> <p> //close the socket<br /> socket.Close();<br /> return "";<br /> }</p> <p> /// <summary><br /> /// This method get the Packet and calculates the total size<br /> /// of the Pack by converting it to byte array<br /> /// </summary><br /> public static Int32 Serialize(IcmpPacket packet, Byte[] Buffer,<br /> I nt32 PacketSize, Int32 PingData )<br /> {<br /> Int32 cbReturn = 0;<br /> // serialize the struct into the array<br /> int Index=0;</p> <p> Byte [] b_type = new Byte[1];<br /> b_type[0] = (packet.Type);</p> <p> Byte [] b_code = new Byte[1];<br /> b_code[0] = (packet.SubCode);</p> <p> Byte [] b_cksum = BitConverter.GetBytes(packet.CheckSum);<br /> Byte [] b_id = BitConverter.GetBytes(packet.Identifier);<br /> Byte [] b_seq = BitConverter.GetBytes(packet.SequenceNumber);</p> <p> Array.Copy( b_type, 0, Buffer, Index, b_type.Length );<br /> Index += b_type.Length;</p> <p> Array.Copy( b_code, 0, Buffer, Index, b_code.Length );<br /> Index += b_code.Length;</p> <p> Array.Copy( b_cksum, 0, Buffer, Index, b_cksum.Length );<br /> Index += b_cksum.Length;</p> <p> Array.Copy( b_id, 0, Buffer, Index, b_id.Length );<br /> Index += b_id.Length;</p> <p> Array.Copy( b_seq, 0, Buffer, Index, b_seq.Length );<br /> Index += b_seq.Length;</p> <p> // copy the data<br /> Array.Copy( packet.Data, 0, Buffer, Index, PingData );<br /> Index += PingData;<br /> if( Index != PacketSize/* sizeof(IcmpPacket) */)<br /> {<br /> cbReturn = -1;<br /> return cbReturn;<br /> }</p> <p> cbReturn = Index;<br /> return cbReturn;<br /> }</p> <p> /// <summary><br /> /// This Method has the algorithm to make a checksum<br /> /// </summary><br /> public static UInt16 checksum( UInt16[] buffer, int size )<br /> {<br /> Int32 cksum = 0;<br /> int counter;<br /> counter = 0;</p> <p> while ( size > 0 )<br /> {<br /> UInt16 val = buffer[counter];<br /> cksum += Convert.ToInt32( buffer[counter] );<br /> counter += 1;<br /> size -= 1;<br /> }<br /> cksum = (cksum >> 16) + (cksum & 0xffff);<br /> cksum += (cksum >> 16);<br /> return (UInt16)(~cksum);<br /> }<br /> } /// 类结束</p> <p> public class IcmpPacket<br /> {<br /> public Byte Type; // type of message<br /> public Byte SubCode; // type of sub code<br /> public UInt16 CheckSum; // ones complement checksum of struct<br /> public UInt16 Identifier; // identifier<br /> public UInt16 SequenceNumber; // sequence number<br /> public Byte [] Data;<br /> } // class IcmpPacket</p> <p>}<br />