/// <summary>
/// Log a new UDP packet.
/// </summary>
/// <param name="packet">
/// The packet to log.
/// </param>
public void LogPacket(UdpPacket packet)
{
lock (m_logger.XmlWriter)
{
// <UdpHeader>
m_logger.XmlWriter.WriteStartElement ("UdpHeader");
m_logger.XmlWriter.WriteElementString ("SourcePort", packet.SourcePort.ToString());
m_logger.XmlWriter.WriteElementString ("DestinationPort", packet.DestinationPort.ToString());
m_logger.XmlWriter.WriteElementString ("Checksum", packet.Checksum.ToString());
// <LengthFields>
m_logger.XmlWriter.WriteStartElement ("UdpLengthFields");
int dataLength = (packet.Data != null ? packet.Data.Length : 0);
m_logger.XmlWriter.WriteElementString ("TotalLength", packet.Length + " bytes");
m_logger.XmlWriter.WriteElementString ("HeaderLength", (packet.Length - dataLength) + " bytes");
m_logger.XmlWriter.WriteElementString ("DataLength", dataLength + " bytes");
m_logger.XmlWriter.WriteEndElement ();
// </LengthFields>
m_logger.XmlWriter.WriteEndElement ();
// </UdpHeader>
}
}
/// <summary>
/// Whenever a new UDP packet arrives it should be passed to this method.
/// If the packet is to be filtered out it will be ignored otherwise the
/// UdpPacketArrived will be raised with the packet
/// </summary>
/// <param name="packet">
/// The packet which has arrived.
/// </param>
public void HandleNewPacket(UdpPacket packet)
{
bool match = true;
// check the source port filter
foreach (string filter in m_sourcePortFilter)
{
if (!UdpFilter.IsMatch (packet.SourcePort, filter))
{
match = false;
break;
}
}
// if no match then exit
if (!match)
{
return;
}
// check the destination port filter
foreach (string filter in m_destPortFilter)
{
if (!UdpFilter.IsMatch (packet.DestinationPort, filter))
{
match = false;
break;
}
}
// if no match then exit
if (!match)
{
return;
}
// if we get here then the packet has passed through the filter and we
// raise the event
if (UdpPacketArrived != null)
{
UdpPacketArrived (packet);
}
}