private PingReply InternalSend(IPAddress address, byte[] buffer, int timeout, PingOptions options)
{
if (_handlePingV4 == IntPtr.Zero)
{
_handlePingV4 = IcmpCreateFile();
if (_handlePingV4.ToInt32() == -1)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
uint replySize = 0xffff;
byte[] replybuffer = new byte[replySize];
if (buffer.Length <= 0)
{
throw new ArgumentException("Buffer must be non=zero length");
}
GCHandle pReplyBuffer = GCHandle.Alloc(replybuffer, GCHandleType.Pinned);
GCHandle pSendBuffer = GCHandle.Alloc(buffer, GCHandleType.Pinned);
IcmpEchoReply reply;
try
{
IPOptions ipo = new IPOptions(options);
uint result = IcmpSendEcho2(_handlePingV4,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero,
BitConverter.ToUInt32(address.GetAddressBytes(), 0),
pSendBuffer.AddrOfPinnedObject(),
(ushort)buffer.Length,
ref ipo,
pReplyBuffer.AddrOfPinnedObject(),
replySize,
(uint)timeout);
if (result == 0)
{
int error = Marshal.GetLastWin32Error();
if (error == 0x57)
{
throw new PingException("Destination address is unreachable on this network.");
}
throw new Win32Exception(error);
}
}
finally
{
reply = (IcmpEchoReply)Marshal.PtrToStructure(pReplyBuffer.AddrOfPinnedObject(), typeof(IcmpEchoReply));
pReplyBuffer.Free();
pSendBuffer.Free();
}
return(new PingReply(reply));
}
internal static extern uint IcmpSendEcho2(IntPtr icmpHandle,
IntPtr Event,
IntPtr apcRoutine,
IntPtr apcContext,
uint ipAddress,
IntPtr data,
ushort dataSize,
ref IPOptions options,
IntPtr replyBuffer,
uint replySize,
uint timeout);
private PingReply InternalSend(IPAddress address, byte [] buffer, int timeout, PingOptions options)
{
if (_handlePingV4 == IntPtr.Zero)
{
_handlePingV4 = IcmpCreateFile();
}
if (_replyBuffer == IntPtr.Zero)
{
_replyBuffer = MarshalEx.AllocHLocal(0xffff);
}
IPOptions ipo = new IPOptions(options);
InitStructure(buffer);
IcmpSendEcho2(_handlePingV4, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, (uint)address.Address, _requestBuffer, (ushort)buffer.Length, ref ipo, _replyBuffer, 0xffff, (uint)timeout);
FreeStructure();
IcmpEchoReply reply = (IcmpEchoReply)Marshal.PtrToStructure(this._replyBuffer, typeof(IcmpEchoReply));
return(new PingReply(reply));
}
internal static extern uint IcmpSendEcho2(IntPtr icmpHandle, IntPtr Event, IntPtr apcRoutine, IntPtr apcContext, uint ipAddress, IntPtr data, ushort dataSize, ref IPOptions options, IntPtr replyBuffer, uint replySize, uint timeout);
private PingReply InternalSend(IPAddress address, byte [] buffer, int timeout, PingOptions options)
{
if (_handlePingV4 == IntPtr.Zero) _handlePingV4 = IcmpCreateFile();
if (_replyBuffer == IntPtr.Zero)
{
_replyBuffer = MarshalEx.AllocHLocal(0xffff);
}
IPOptions ipo = new IPOptions(options);
InitStructure(buffer);
IcmpSendEcho2(_handlePingV4, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, (uint)address.Address, _requestBuffer, (ushort)buffer.Length, ref ipo, _replyBuffer, 0xffff, (uint)timeout);
FreeStructure();
IcmpEchoReply reply = (IcmpEchoReply)Marshal.PtrToStructure(this._replyBuffer, typeof(IcmpEchoReply));
return new PingReply(reply);
}
