/// <summary>
/// Attempts to send an Internet Control Message Protocol (ICMP) echo message with the specified data buffer to the computer that has the specified IPAddress and receive a corresponding ICMP echo reply message from that computer. This overload allows you to specify a time-out value for the operation and control fragmentation and Time-to-Live values for the ICMP echo message packet.
/// </summary>
/// <param name="address">An <see cref="IPAddress"/> that identifies the computer that is the destination for the ICMP echo message.</param>
/// <param name="timeout">An <see cref="Int32"/> value that specifies the maximum number of milliseconds (after sending the echo message) to wait for the ICMP echo reply message.</param>
/// <param name="buffer">A <see cref="Byte"/> array that contains data to be sent with the ICMP echo message and returned in the ICMP echo reply message.
/// The array cannot contain more than 65,500 bytes.</param>
/// <param name="options">A <see cref="PingOptions"/> object used to control fragmentation and Time-to-Live values for the ICMP echo message packet.</param>
/// <returns>A <see cref="PingReply"/> object that provides information about the ICMP echo reply message, if one was received, or provides the reason for the failure, if no message was received.
/// The method will return PacketTooBig if the packet exceeds the Maximum Transmission Unit (MTU). </returns>
/// <exception cref="ArgumentNullException">address is a null reference (Nothing in Visual Basic).
/// <para>-or-</para>
/// buffer is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentOutOfRangeException">timeout is less than zero.</exception>
/// <exception cref="ArgumentException">The size of buffer exceeds 65500 bytes.
/// <para>-or-</para>
/// address is not a valid IP address.</exception>
public PingReply Send(IPAddress address, int timeout, byte[] buffer, PingOptions options)
{
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (buffer.Length > 0xffdc)
{
throw new ArgumentException(Properties.Resources.net_invalidPingBufferSize, "buffer");
}
if (timeout < 0)
{
throw new ArgumentOutOfRangeException("timeout");
}
if (address == null)
{
throw new ArgumentNullException("address");
}
if (address.Equals(IPAddress.Any) || address.Equals(IPAddress.IPv6Any))
{
throw new ArgumentException(Properties.Resources.net_invalid_ip_addr, "address");
}
int a = BitConverter.ToInt32(address.GetAddressBytes(), 0);
IPOptions options2 = new IPOptions(options);
int returned = NativeMethods.IcmpSendEcho(handle, a, buffer, (short)buffer.Length, ref options2, replyBuffer, 0x100ff, timeout);
if (returned == 0)
{
returned = Marshal.GetLastWin32Error();
if (returned != 0)
{
return(new PingReply((IPStatus)returned));
}
}
return(new PingReply((IcmpEchoReply)Marshal.PtrToStructure(this.replyBuffer, typeof(IcmpEchoReply))));
}
internal PingOptions(IPOptions options)
{
this.ttl = 0x80;
this.ttl = options.ttl;
this.dontFragment = (options.flags & 2) > 0;
}
internal static extern int IcmpSendEcho(IntPtr icmpHandle, int destinationAddress,
byte[] requestData, short requestSize,
ref IPOptions requestOptions,
IntPtr replyBuffer, int replySize,
int timeout);