private static void HandlePacket(object sender, CaptureEventArgs ev)
{
try
{
Packet packet = ParseEvent(ev);
if (packet != null)
{
IpPacket ip_packet = ExtractIpPacket(packet);
if (ip_packet != null)
{
IPAddress source_address = ip_packet.SourceAddress;
UdpPacket udp_packet = ExtractUdpPacket(ip_packet);
if (udp_packet != null)
{
try
{
var message = new SnmpMessage(udp_packet.PayloadData);
lock ("log_message")
{
if (message.IsValidSnmpMessage())
{
Log.LogMessage(message, source_address);
}
else
{
Log.LogInvalidMessage(message, source_address);
}
}
}
catch (BerException ex)
{
Debug.WriteLine(ex.ToString());
Log.LogInvalidMessage("Error: " + ex.ToString() + Environment.NewLine + " Message raw data: " + Utils.GetBytes(udp_packet.PayloadData),
source_address);
}
}
Console.WriteLine("{0} Message received from {1}", DateTime.Now.ToString("s"), source_address);
}
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
Log.LogMessage("Expection: " + ex.ToString());
}
}
public static void LogInvalidMessage(SnmpMessage message, IPAddress ip_address)
{
string filename = Log.ErrorLogFilename(ip_address);
Log.LogInvalidMessage(message.MessageData + Environment.NewLine + message.Dump(), filename);
}
public static void LogMessage(SnmpMessage message, IPAddress ip_address)
{
string filename = Log.LogFilename(ip_address);
Log.LogMessage(message.LogMessage(), filename);
}