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this class work excellent with 32 bit but dosn't with 64 bit

any body can help me to fix it ?

using System;
using System.Net;
using System.Runtime.InteropServices;
namespace testPing
    class Class1
        public static class ServerStatus
            [StructLayout(LayoutKind.Sequential, Pack = 1)]
            public struct ICMP_ECHO_REPLY
                public uint Address;
                public uint Status;
                public uint RoundTripTime;
                public ushort DataSize;
                public ushort Reserved;
                public IntPtr Data;
                public IP_OPTION_INFORMATION Options;
            [StructLayout(LayoutKind.Sequential, Pack = 1)]
            public struct IP_OPTION_INFORMATION
                public byte TTL;
                public byte TOS;
                public byte Flags;
                public byte OptionsSize;
                public IntPtr OptionsData;
                public int RealOptionData;
            public static class Icmp
                public const int IP_SUCCESS = 0;
                public const int IP_BUF_TOO_SMALL = 11001;
                public const int IP_REQ_TIMED_OUT = 11010;
                public static extern IntPtr IcmpCreateFile();
                public static extern uint IcmpSendEcho(IntPtr icmpHandle, uint
                ipAddr, ref int requestData, ushort requestSize, IntPtr optionInfo, ref
ICMP_ECHO_REPLY replyBuffer, uint replySize, int timeout);
                public static extern bool IcmpCloseHandle(IntPtr icmpHandle);
                public static bool Ping(string host)
                    uint addr =
                    BitConverter.ToUInt32(IPAddress.Parse(host).GetAddressBytes(), 0);
                    IntPtr h = IcmpCreateFile();
                    int req = 123456789;
                    ICMP_ECHO_REPLY rep = new ICMP_ECHO_REPLY();
                    uint retval = IcmpSendEcho(h, addr, ref req, 4, IntPtr.Zero,
                    ref rep, 56, 10);
                    return (retval != 0 && rep.Status == IP_SUCCESS);
Posted 1-Jan-13 6:15am

1 solution

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Solution 1

And what's wrong with this one:[^]?

PS: doesn't work is not an error message, nor a concrete result.
PS2: have you checked if the 64 bit version of those api calls is the same as in 32 bit systems? Read this one:[^], and look for "On a 64-bit platform..."
EgyptianRobot 2-Jan-13 3:33am
Ping Class work properly in all cases except in one only case its

" when the server is connected and after awhile the server became disconnected "

in this case the ping class get the same reply as if the server is connected....
Zoltán Zörgő 2-Jan-13 3:53am
I don't understand.
EgyptianRobot 2-Jan-13 5:45am
imagine there's client and server now and the server is connected to the network and everything is okay.
now ---- > reply.Status == IPStatus.Success
if i disconnect the server now the result still the same IPStatus.Success
when I log off the client OS and then log on
the status change
Zoltán Zörgő 2-Jan-13 6:55am
Not only the status matters. You have to check the other properties in Options field. Try this sample:

using System;
using System.Net;
using System.Net.NetworkInformation;
using System.Text;

namespace Examples.System.Net.NetworkInformation.PingTest
public class PingExample
// args[0] can be an IPaddress or host name.
public static void Main (string[] args)
Ping pingSender = new Ping ();

// Create a buffer of 32 bytes of data to be transmitted.
string data = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
byte[] buffer = Encoding.ASCII.GetBytes (data);

// Wait 10 seconds for a reply.
int timeout = 10000;

// Set options for transmission:
// The data can go through 64 gateways or routers
// before it is destroyed, and the data packet
// cannot be fragmented.
PingOptions options = new PingOptions (64, true);

// Send the request.
PingReply reply = pingSender.Send (args[0], timeout, buffer, options);

if (reply.Status == IPStatus.Success)
Console.WriteLine ("Address: {0}", reply.Address.ToString ());
Console.WriteLine ("RoundTrip time: {0}", reply.RoundtripTime);
Console.WriteLine ("Time to live: {0}", reply.Options.Ttl);
Console.WriteLine ("Don't fragment: {0}", reply.Options.DontFragment);
Console.WriteLine ("Buffer size: {0}", reply.Buffer.Length);
Console.WriteLine (reply.Status);
EgyptianRobot 2-Jan-13 16:56pm
thanks million for your efforts but I don't know why this code dosn't work with 64 bit.
may be i have something wrong..i still working on it

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