/// <summary>
/// This routine builds the appropriate ICMP echo packet depending on the
/// protocol family requested.
/// </summary>
public void BuildPingPacket()
{
// Initialize the socket if it hasn't already been done
if (pingSocket == null)
{
InitializeSocket();
}
// Create the ICMP header and initialize the members
icmpHeader = new IcmpHeader()
{
Id = pingId, Sequence = pingSequence, Type = IcmpHeader.EchoRequestType, Code = IcmpHeader.EchoRequestCode
};
// Build the data payload of the ICMP echo request
pingPayload = new byte[pingPayloadLength];
for (int i = 0; i < pingPayload.Length; i++)
{
pingPayload[i] = (byte)'e';
}
}
private DateTime pingSentTime; // Timestamp of when ping request was sent
/// <summary>
/// Base constructor that initializes the member variables to default values. It also
/// creates the events used and initializes the async callback function.
/// </summary>
public RawSocketPing()
{
pingSocket = null;
pingTtl = 8;
pingPayloadLength = 8;
pingSequence = 0;
pingReceiveTimeout = 2000;
destEndPoint = new IPEndPoint(IPAddress.Loopback, 0);
icmpHeader = null;
}
public byte[] BuildPacket(ushort pingID, byte[] payLoad)
{
IcmpHeader protocolHeader = new IcmpHeader()
{
Id = pingID, Sequence = 0, Type = IcmpHeader.EchoRequestType, Code = IcmpHeader.EchoRequestCode
};;
payLoad = protocolHeader.GetProtocolPacketBytes(payLoad);
return(payLoad);
}
