public void ReceivePUP(PUP pup)
{
//
// Filter out packets not destined for us.
// Even though we use pcap in non-promiscuous mode, if
// something else has set the interface to promiscuous mode, that
// setting may be overridden.
//
if (pup.DestinationPort.Host != 0 && // Not broadcast.
pup.DestinationPort.Host != DirectoryServices.Instance.LocalHost) // Not our address.
{
// Do nothing with this PUP.
Log.Write(LogType.Verbose, LogComponent.PUP, "PUP is neither broadcast nor for us. Discarding.");
return;
}
//
// Forward PUP on to registered endpoints.
//
if (_dispatchMap.ContainsKey(pup.DestinationPort.Socket))
{
PUPProtocolEntry entry = _dispatchMap[pup.DestinationPort.Socket];
if (entry.ConnectionType == ConnectionType.Connectionless)
{
Log.Write(LogType.Verbose, LogComponent.PUP, "Dispatching PUP (source {0}, dest {1}) to {2} handler.", pup.SourcePort, pup.DestinationPort, entry.FriendlyName);
// Connectionless; just pass the PUP directly to the protocol
entry.ProtocolImplementation.RecvData(pup);
}
else
{
// RTP / BSP protocol. Pass this to the BSP handler to set up a channel.
Log.Write(LogType.Verbose, LogComponent.PUP, "Dispatching PUP (source {0}, dest {1}) to BSP protocol for {0}.", pup.SourcePort, pup.DestinationPort, entry.FriendlyName);
BSPManager.EstablishRendezvous(pup, entry.WorkerType);
}
}
else if (BSPManager.ChannelExistsForSocket(pup))
{
// An established BSP channel, send data to it.
BSPManager.RecvData(pup);
}
else if (EFTPManager.ChannelExistsForSocket(pup))
{
EFTPManager.RecvData(pup);
}
else
{
// Not a protocol we handle; log it.
Log.Write(LogType.Normal, LogComponent.PUP, "Unhandled PUP protocol, source {0}, destination {1}, type {2}, dropped packet.", pup.SourcePort, pup.DestinationPort, pup.Type);
}
}
private void SendBootFile(PUP p)
{
//
// The request PUP contains the file number in the lower-order 16-bits of the pup ID.
// Assuming the number is a valid bootfile, we start sending it to the client's port via EFTP.
//
ushort fileNumber = (ushort)p.ID;
Log.Write(LogType.Verbose, LogComponent.MiscServices, "Boot file request is for file {0}.", fileNumber);
FileStream bootFile = BootServer.GetStreamForNumber(fileNumber);
if (bootFile == null)
{
Log.Write(LogType.Warning, LogComponent.MiscServices, "Boot file {0} does not exist or could not be opened.", fileNumber);
}
else
{
// Send the file.
EFTPManager.SendFile(p.SourcePort, bootFile);
}
}