private void PacketProcessor()
{
DebugInformation.WriteLine("[PD] Packet processor started.");
var localPacketBuffer = new List <EthernetPacket>();
var packetBytes = 0;
while (started)
{
EthernetPacket rawPacket;
// wait if there haven't been any new packets put into queue
packetsAvailable.WaitOne();
// get packets from queue and add them to the local buffer
while (packetBuffer.TryDequeue(out rawPacket) && rawPacket != null)
{
localPacketBuffer.Add(rawPacket);
packetBytes += rawPacket.BytesHighPerformance.BytesLength;
// add 16 bytes | TODO: find out why there are always 16 more bytes needed for each packet
packetBytes += 16;
}
packetsAvailable.Reset();
var packetQueue = new SendQueue(packetBytes * packetRouters.Count);
// loop through local packet buffer
foreach (var packet in localPacketBuffer)
{
// skip local packets
if (iface.IsLocalIPv4Packet(packet))
{
continue;
}
// send to packet readers
foreach (IPacketReader reader in packetReaders)
{
reader.ReadPacket(packet);
}
// send to packet filters, skip routing step for filtered packets
lock (packetFilters)
{
foreach (IPacketFilter filter in packetFilters)
{
if (filter.Enabled && filter.FilterPacket(packet))
{
continue;
}
}
}
// send to packet routers
foreach (IPacketRouter router in packetRouters)
{
var routedPacket = router.RoutePacket(packet);
if (routedPacket != null)
{
packetQueue.Add(routedPacket.Bytes);
}
}
}
// send out all the routed packets
packetQueue.TransmitAll(iface.PcapDevice);
localPacketBuffer.Clear();
packetBytes = 0;
}
DebugInformation.WriteLine("[PD] Packet processor stopped.");
}