/// <summary>
/// Raises the DiscoveryMessageReceived event.
/// </summary>
/// <param name="message">Message data object.</param>
protected void OnDiscoveryMessageReceived(DiscoveryMessage message)
{
if (DiscoveryMessageReceived != null)
{
DiscoveryMessageReceived(this, new DiscoveryMessageReceivedEventArgs(message));
} // if(DiscoveryMessageReceived != null)
}
/// <summary>
/// Initializes a new instance of the DiscoveryMessageReceivedEventArgs class.
/// </summary>
/// <param name="message">The value for the Message property.</param>
/// <exception cref="ArgumentNullException">message cannot be null.</exception>
public DiscoveryMessageReceivedEventArgs(DiscoveryMessage message)
{
if (message == null)
{
throw new ArgumentNullException("message");
}
this.Message = message;
}
/// <summary>
/// Check if we've already got an IP address, and if not, parse a DiscoveryMessage IP-address.
/// </summary>
/// <param name="message"></param>
private void ProcessDiscoveryMessage(DiscoveryMessage message)
{
if (IPAddress == null)
{
// Set the IP address
this.IPAddress = message.IPAddress;
this.MacAddress = message.MacAddress;
if (IPAddress != null)
{
// Request ICM status update
Refresh();
OnDiscoveryCompleted();
// Start updating
_tmrRefresh.Start();
} // if(_ipAddress != null)
} // if(_ipAddress == null)
}
/// <summary>
/// Processes a received data packet that contains the ICM network information.
/// </summary>
/// <param name="data"></param>
private void ProcessDiscoveryPacket(byte[] data)
{
DiscoveryMessage message;
Int32 ipTemp;
IPAddress ipAddress;
PhysicalAddress macAddress;
int length;
string dataString;
string key = String.Empty;
string value = null;
// Check for minimum valid data length
if (data.Length >= 34)
{
try
{
ipTemp = BitConverter.ToInt32(data, 20);
ipAddress = new IPAddress(ipTemp);
byte[] mac = { data[28], data[29], data[30], data[31], data[32] };
macAddress = new PhysicalAddress(mac);
// Get the data length
length = ToUInt16(data, 12);
// Make sure the data packet actually has this amount of data
if (data.Length == length + 52)
{
// Get the contained text
dataString = Encoding.ASCII.GetString(data, 52, length);
if (dataString.Contains("="))
{
key = dataString.Substring(0, dataString.IndexOf("=", StringComparison.Ordinal));
value = dataString.Substring(dataString.IndexOf("=", StringComparison.Ordinal) + 1);
if (value.Contains("\n"))
{
value = value.Remove(value.IndexOf("\n", StringComparison.Ordinal));
}
} // if(dataString.Contains("="))
message = new DiscoveryMessage
{
IPAddress = ipAddress,
MacAddress = macAddress,
Checksum = ToUInt16(data, 8),
Key = key,
Value = value
};
// Process the message internally for data we need
ProcessDiscoveryMessage(message);
// Raise an event
OnDiscoveryMessageReceived(message);
} // if (data.Length == length + 52)
} // try
catch (Exception ex)
{
Debug.WriteLine("ProcessDiscoveryPacket(): " + ex, "SecurityModule");
} // catch
} // if (data.Length >= 34)
}