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PING 是一个用来检测网络连接速度的工具，它会在本机和给出的远程主机名之间建立一个SOCKET 连接并向其发送一个ICMP协议格式的数据包，然后远程主机作出响应，发回一个数据包，通过计算发送到接收数据包的时间间隔，我们可以确定连接的速度。
此程序可以使用于 asp+asp.net 虚拟主机，时代互联（
www.now.cn)的虚拟主机可以支持 。
使用方法 ping <hostname>
<hostname> 主机名
可选属性，决定是否连续的 ping 远程主机。
下面是代码：
///ping.cs
namespace SaurabhPing
{
using System;
using System.Net;
using System.Net.Sockets;
/// <summary>
/// 主要的类:ping
/// </summary>
class Ping
{
//声明几个常量
const int SOCKET_ERROR = -1;
const int ICMP_ECHO = 8;
/// <summary>
/// 这里取得Hostname参数
/// </summary>
public static void Main(string argv)
{
if(argv.Length==0)
{
//If user did not enter any Parameter inform him
Console.WriteLine("Usage:Ping <hostname> /r") ;
Console.WriteLine("<hostname> The name of the Host who you want to ping");
Console.WriteLine("/r Ping the host continuously") ;
}
else if(argv.Length==1)
{
//Just the hostname provided by the user
//call the method "PingHost" and pass the HostName as a parameter
PingHost(argv) ;
}
else if(argv.Length==2)
{
//the user provided the hostname and the switch
if(argv=="/r")
{
//loop the ping program
while(true)
{
//call the method "PingHost" and pass the HostName as a parameter
PingHost(argv) ;
}
}
else
{
//if the user provided some other switch
PingHost(argv) ;
}
}
else
{
//Some error occurred
Console.WriteLine("Error in Arguments") ;
}
}
/// <summary>
/// 主要的方法，用来取得IP，
/// 并计算响应时间
/// </summary>
public static void PingHost(string host)
{
//Declare the IPHostEntry
IPHostEntry serverHE, fromHE;
int nBytes = 0;
int dwStart = 0, dwStop = 0;
//Initilize a Socket of the Type ICMP
Socket socket =
new Socket(AddressFamily.AfINet, SocketType.SockRaw, ProtocolType.ProtICMP);
// Get the server endpoint
try
{
serverHE = DNS.GetHostByName(host);
}
catch(Exception)
{
Console.WriteLine("Host not found"); // fail
return ;
}
// Convert the server IP_EndPoint to an EndPoint
IPEndPoint ipepServer = new IPEndPoint(serverHE.AddressList, 0);
EndPoint epServer = (ipepServer);
// Set the receiving endpoint to the client machine
fromHE = DNS.GetHostByName(DNS.GetHostName());
IPEndPoint ipEndPointFrom = new IPEndPoint(fromHE.AddressList, 0);
EndPoint EndPointFrom = (ipEndPointFrom);
int PacketSize = 0;
IcmpPacket packet = new IcmpPacket();
// Construct the packet to send
packet.Type = ICMP_ECHO; //8
packet.SubCode = 0;
packet.CheckSum = UInt16.Parse("0");
packet.Identifier = UInt16.Parse("45");
packet.SequenceNumber = UInt16.Parse("0");
int PingData = 32; // sizeof(IcmpPacket) - 8;
packet.Data = new Byte;
//Initilize the Packet.Data
for (int i = 0; i < PingData; i++)
{
packet.Data
= (byte)'#';
}
//Variable to hold the total Packet size
PacketSize = PingData + 8;
Byte icmp_pkt_buffer = new Byte;
Int32 Index = 0;
//Call a Method Serialize which counts
//The total number of Bytes in the Packet
Index = Serialize(
packet,
icmp_pkt_buffer,
PacketSize,
PingData );
//Error in Packet Size
if( Index == -1 )
{
Console.WriteLine("Error in Making Packet");
return ;
}
// now get this critter into a UInt16 array
//Get the Half size of the Packet
Double double_length = Convert.ToDouble(Index);
Double dtemp = Math.Ceil( double_length / 2);
int cksum_buffer_length = Convert.ToInt32(dtemp);
//Create a Byte Array
UInt16 cksum_buffer = new UInt16;
//Code to initialize the Uint16 array
int icmp_header_buffer_index = 0;
for( int i = 0; i < cksum_buffer_length; i++ ) {
cksum_buffer =
BitConverter.ToUInt16(icmp_pkt_buffer,icmp_header_buffer_index);
icmp_header
以上代码可以直接在时代互联的ASP+ASP.NET 虚拟主机上直接运行，欢迎试用 ！到www.now.net.cn/host 订购后可试用 ！
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