//string request = "GET /\r\n";
//Byte[] bytesSent = Encoding.ASCII.GetBytes(request);
//Byte[] bytesReceived = new Byte[1000];
//s.Send(bytesSent, bytesSent.Length, 0);
//int bytes = 0;
//bytes = s.Receive(bytesReceived, bytesReceived.Length, 0);
//string data = Encoding.ASCII.GetString(bytesReceived, 0, bytes);
//Log.Write(LogType.Verbose, LogComponent.Exp, "Received {0}", data);
private void SendNameLookupReply(PUP p)
{
//
// For the request PUP:
// A string consisting of an inter-network name expression.
// NOTE: This is *not* a BCPL string, just the raw characters.
//
// Response:
// One or more 6-byte blocks containing the address(es) corresponding to the
// name expression. Each block is a Pup Port structure, with the network and host numbers in
// the first two bytes and the socket number in the last four bytes.
//
//
// For now, the assumption is that each name maps to at most one address.
//
string lookupName = Helpers.ArrayToString(p.Contents);
Log.Write(LogType.Verbose, LogComponent.MiscServices, "Name lookup is for '{0}'", lookupName);
HostAddress address = DirectoryServices.Instance.NameLookup(lookupName);
if (address == null)
{
address = ExternalHost.LookupExternalHost(lookupName);
}
if (address != null)
{
// We found an address, pack the port into the response.
PUPPort lookupPort = new PUPPort(address, 0);
PUPPort localPort = new PUPPort(DirectoryServices.Instance.LocalHostAddress, p.DestinationPort.Socket);
PUP lookupReply = new PUP(PupType.NameLookupResponse, p.ID, p.SourcePort, localPort, lookupPort.ToArray());
Router.Instance.SendPup(lookupReply);
Log.Write(LogType.Verbose, LogComponent.MiscServices, "Address is '{0}'", address);
}
else
{
// Unknown host, send an error reply
string errorString = "Unknown host.";
PUPPort localPort = new PUPPort(DirectoryServices.Instance.LocalHostAddress, p.DestinationPort.Socket);
PUP errorReply = new PUP(PupType.DirectoryLookupErrorReply, p.ID, p.SourcePort, localPort, Helpers.StringToArray(errorString));
Router.Instance.SendPup(errorReply);
Log.Write(LogType.Verbose, LogComponent.MiscServices, "Host is unknown.");
}
}
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.
//
Log.Write(LogType.Verbose, LogComponent.PUP, "PUP received.");
IFS.HostAddress targetAddress = new IFS.HostAddress(DirectoryServices.Instance.LocalNetwork, pup.DestinationPort.Host);
if (pup.DestinationPort.Host != 0 && // Not broadcast.
pup.DestinationPort.Host != DirectoryServices.Instance.LocalHost && // Not our address.
!ExternalHost.AcceptAddress(targetAddress))
{
// Do nothing with this PUP.
Log.Write(LogType.Verbose, LogComponent.PUP, "PUP {0} is neither broadcast nor for us. Discarding.", targetAddress);
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 (ExternalHost.AcceptAddress(new HostAddress(pup.DestinationPort)))
{
// RTP / BSP protocol. Pass this to the BSP handler to set up a channel.
Log.Write(LogType.Verbose, LogComponent.PUP, "Remote host: Dispatching PUP (source {0}, dest X) to BSP protocol for {0}.", pup.SourcePort, pup.DestinationPort);
BSPManager.EstablishRendezvous(pup, typeof(ExternalHostWorker));
}
else if (BSPManager.ChannelExistsForSocket(pup))
{
// An established BSP channel, send data to it.
Log.Write(LogType.Normal, LogComponent.PUP, "BSP PUP");
BSPManager.RecvData(pup);
}
else if (EFTPManager.ChannelExistsForSocket(pup))
{
Log.Write(LogType.Normal, LogComponent.PUP, "EFTP 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);
}
}