public static PingReply Send(IPAddress srcAddress, IPAddress destAddress, int timeout = 1500, byte[] buffer = null, PingOptions po = null)
{
if (destAddress == null || destAddress.AddressFamily != AddressFamily.InterNetwork || destAddress.Equals(IPAddress.Any))
{
throw new ArgumentException();
}
//Defining pinvoke args
var source = srcAddress == null ? 0 : BitConverter.ToUInt32(srcAddress.GetAddressBytes(), 0);
var destination = BitConverter.ToUInt32(destAddress.GetAddressBytes(), 0);
var sendbuffer = buffer ?? new byte[] { };
var options = new Interop.Option {
Ttl = (po == null ? (byte)255 : (byte)po.Ttl),
Flags = (po == null ? (byte)0 : po.DontFragment ? (byte)0x02 : (byte)0) //0x02
};
var fullReplyBufferSize = Interop.ReplyMarshalLength + sendbuffer.Length; //Size of Reply struct and the transmitted buffer length.
var allocSpace = Marshal.AllocHGlobal(fullReplyBufferSize); // unmanaged allocation of reply size. TODO Maybe should be allocated on stack
try {
DateTime start = DateTime.Now;
var nativeCode = Interop.IcmpSendEcho2Ex(
Interop.IcmpHandle, //_In_ HANDLE IcmpHandle,
default(IntPtr), //_In_opt_ HANDLE Event,
default(IntPtr), //_In_opt_ PIO_APC_ROUTINE ApcRoutine,
default(IntPtr), //_In_opt_ PVOID ApcContext
source, //_In_ IPAddr SourceAddress,
destination, //_In_ IPAddr DestinationAddress,
sendbuffer, //_In_ LPVOID RequestData,
(short)sendbuffer.Length, //_In_ WORD RequestSize,
ref options, //_In_opt_ PIP_OPTION_INFORMATION RequestOptions,
allocSpace, //_Out_ LPVOID ReplyBuffer,
fullReplyBufferSize, //_In_ DWORD ReplySize,
timeout //_In_ DWORD Timeout
);
TimeSpan duration = DateTime.Now - start;
var reply = (Interop.Reply)Marshal.PtrToStructure(allocSpace, typeof(Interop.Reply)); // Parse the beginning of reply memory to reply struct
byte[] replyBuffer = null;
if (sendbuffer.Length != 0)
{
replyBuffer = new byte[sendbuffer.Length];
Marshal.Copy(allocSpace + Interop.ReplyMarshalLength, replyBuffer, 0, sendbuffer.Length); //copy the rest of the reply memory to managed byte[]
}
if (nativeCode == 0) //Means that native method is faulted.
{
return(new PingReply(nativeCode, reply.Status, new IPAddress(reply.Address), duration));
}
else
{
return(new PingReply(nativeCode, reply.Status, new IPAddress(reply.Address), reply.RoundTripTime, replyBuffer));
}
} finally {
Marshal.FreeHGlobal(allocSpace); //free allocated space
}
}
/// <summary>
/// Sends a ping using IcmpSendEcho2Ex function in Iphlpapi.dll. Use this method when you need to specify a source
/// interface for a ping otherwise use .NET ping implementation.
/// </summary>
/// <param name="srcAddress">The IPv4 source address on which to issue the echo request.</param>
/// <param name="destAddress">The IPv4 destination of the echo request.</param>
/// <param name="timeout">The time, in milliseconds, to wait for replies.</param>
/// <param name="buffer">A buffer that contains data to send in the request.</param>
/// <param name="po">IP header options for the request.</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="FormatException">When the destination address is no valid IpV4 address or not defining a specific IP.</exception>
public static PingReply SendPing(IPAddress srcAddress, IPAddress destAddress, int timeout = 5000, byte[] buffer = null, PingOptions po = null)
{
if (destAddress == null)
throw new ArgumentNullException("destAddress");
if (destAddress.AddressFamily != AddressFamily.InterNetwork || srcAddress.AddressFamily != AddressFamily.InterNetwork || destAddress.Equals(IPAddress.Any))
throw new FormatException();
//Defining p invoke arguments.
var source = srcAddress == null ? 0 : BitConverter.ToUInt32(srcAddress.GetAddressBytes(), 0);
var destination = BitConverter.ToUInt32(destAddress.GetAddressBytes(), 0);
var sendbuffer = buffer ?? new byte[] {};
var options = new Interop.Option
{
Ttl = (po == null ? (byte) 255 : (byte) po.Ttl),
Flags = (po == null ? (byte) 0 : po.DontFragment ? (byte) 0x02 : (byte) 0) //0x02
};
var fullReplyBufferSize = Interop.ReplyMarshalLength + sendbuffer.Length; //Size of Reply structure plus the transmitted buffer length.
var allocSpace = Marshal.AllocHGlobal(fullReplyBufferSize); // unmanaged allocation of reply size. TODO Maybe should be allocated on stack
try
{
DateTime start = DateTime.Now;
var nativeCode = Interop.IcmpSendEcho2Ex(
Interop.IcmpHandle, //_In_ HANDLE IcmpHandle,
default(IntPtr), //_In_opt_ HANDLE Event,
default(IntPtr), //_In_opt_ PIO_APC_ROUTINE ApcRoutine,
default(IntPtr), //_In_opt_ PVOID ApcContext
source, //_In_ IPAddr SourceAddress,
destination, //_In_ IPAddr DestinationAddress,
sendbuffer, //_In_ LPVOID RequestData,
(short) sendbuffer.Length, //_In_ WORD RequestSize,
ref options, //_In_opt_ PIP_OPTION_INFORMATION RequestOptions,
allocSpace, //_Out_ LPVOID ReplyBuffer,
fullReplyBufferSize, //_In_ DWORD ReplySize,
timeout //_In_ DWORD Timeout
);
TimeSpan duration = DateTime.Now - start;
var reply = (Interop.Reply) Marshal.PtrToStructure(allocSpace, typeof (Interop.Reply)); // Parse the beginning of reply memory to reply structure
byte[] replyBuffer = null;
if (sendbuffer.Length != 0)
{
replyBuffer = new byte[sendbuffer.Length];
Marshal.Copy(allocSpace + Interop.ReplyMarshalLength, replyBuffer, 0, sendbuffer.Length); //copy the rest of the reply memory to managed byte[]
}
if (nativeCode == 0) //Means that native method is faulted.
return new PingReply(nativeCode, reply.Status, new IPAddress(reply.Address), duration);
else
return new PingReply(nativeCode, reply.Status, new IPAddress(reply.Address), reply.RoundTripTime, replyBuffer);
}
finally
{
Marshal.FreeHGlobal(allocSpace); //free allocated space
}
}
