/// <summary>
///
/// </summary>
/// <param name="reply"></param>
internal PingReply(ICMP_ECHO_REPLY reply)
{
Address = new IPAddress(reply.Address);
Status = (IPStatus)reply.Status;
Options = new PingOptions(reply);
if (Status == IPStatus.Success)
{
RoundTripTime = reply.RoundTripTime;
Buffer = new byte[reply.DataSize];
Marshal.Copy(reply.Data, Buffer, 0, reply.DataSize);
}
else
{
Buffer = new byte[0];
}
}
internal IP_OPTION_INFORMATION(PingOptions options)
{
Ttl = 0x80;
Tos = 0;
Flags = 0;
OptionsSize = 0;
OptionsData = IntPtr.Zero;
if (options != null)
{
Ttl = (byte)options.Ttl;
if (options.DontFragment)
{
Flags = 2;
}
}
}
private PingReply InternalSend(IPAddress address, byte[] buffer, int timeout, PingOptions options)
{
if (handle == IntPtr.Zero)
{
handle = NativeMethods.IcmpCreateFile();
if (handle.ToInt32() == -1)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
ICMP_ECHO_REPLY reply;
var replyBuffer = new byte[65536];
var bufferHandle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
var replyHandle = GCHandle.Alloc(replyBuffer, GCHandleType.Pinned);
try
{
var ipoption = new IP_OPTION_INFORMATION(options);
if (NativeMethods.IcmpSendEcho2(handle, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero,
BitConverter.ToUInt32(address.GetAddressBytes(), 0),
bufferHandle.AddrOfPinnedObject(), (ushort)buffer.Length, ref ipoption,
replyHandle.AddrOfPinnedObject(), (uint)replyBuffer.Length, (uint)timeout) == 0)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
finally
{
reply = (ICMP_ECHO_REPLY)Marshal.PtrToStructure(replyHandle.AddrOfPinnedObject(), typeof(ICMP_ECHO_REPLY));
replyHandle.Free();
bufferHandle.Free();
}
return new PingReply(reply);
}
/// <summary>
///
/// </summary>
/// <param name="address"></param>
/// <param name="timeout"></param>
/// <param name="buffer"></param>
/// <param name="options"></param>
/// <returns></returns>
public PingReply Send(IPAddress address, int timeout, byte[] buffer, PingOptions options)
{
if (buffer == null)
{
buffer = SendBuffer;
}
if (buffer.Length <= 0)
{
throw new ArgumentOutOfRangeException("buffer");
}
if (timeout < 0)
{
throw new ArgumentOutOfRangeException("timeout");
}
if (address == null)
{
throw new ArgumentNullException("address");
}
if (disposed)
{
throw new ObjectDisposedException(GetType().FullName);
}
PingReply reply;
try
{
reply = InternalSend(address, buffer, timeout, options);
}
catch (PingException)
{
throw;
}
catch (Exception ex)
{
throw new PingException("Impossible to send packet.", ex);
}
return reply;
}
/// <summary>
///
/// </summary>
/// <param name="hostNameOrAddress"></param>
/// <param name="timeout"></param>
/// <param name="buffer"></param>
/// <param name="options"></param>
/// <returns></returns>
public PingReply Send(string hostNameOrAddress, int timeout, byte[] buffer, PingOptions options)
{
if (String.IsNullOrEmpty(hostNameOrAddress))
{
throw new ArgumentNullException("hostNameOrAddress");
}
IPAddress address;
try
{
address = IPAddress.Parse(hostNameOrAddress);
}
catch (FormatException)
{
try
{
address = Dns.GetHostEntry(hostNameOrAddress).AddressList[0];
}
catch (Exception ex)
{
throw new PingException("Impossible to resolve hostname.", ex);
}
}
return Send(address, timeout, buffer, options);
}
private PingReply InternalSend(IPAddress address, byte[] buffer, int timeout, PingOptions options)
{
if (handle == IntPtr.Zero)
{
handle = NativeMethods.IcmpCreateFile();
if (handle.ToInt32() == -1)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
ICMP_ECHO_REPLY reply;
var replyBuffer = new byte[65536];
var bufferHandle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
var replyHandle = GCHandle.Alloc(replyBuffer, GCHandleType.Pinned);
try
{
var ipoption = new IP_OPTION_INFORMATION(options);
if (NativeMethods.IcmpSendEcho2(handle, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero,
BitConverter.ToUInt32(address.GetAddressBytes(), 0),
bufferHandle.AddrOfPinnedObject(), (ushort)buffer.Length, ref ipoption,
replyHandle.AddrOfPinnedObject(), (uint)replyBuffer.Length, (uint)timeout) == 0)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
finally
{
reply = (ICMP_ECHO_REPLY)Marshal.PtrToStructure(replyHandle.AddrOfPinnedObject(), typeof(ICMP_ECHO_REPLY));
replyHandle.Free();
bufferHandle.Free();
}
return(new PingReply(reply));
}