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java.lang.Object
   |
   +----edu.utah.janos.nodeos.pj_ProtocolLayer
           |
           +----edu.utah.janos.nodeos.pj_UDPLayer

Summary

class  pj_UDPLayer
     extends edu.utah.janos.nodeos.pj_ProtocolLayer
{
          // Fields 3
     private final DatagramPacket dp;
     private final DatagramSocket ds;
     private final Hashtable sockets;

          // Constructors 1
     pj_UDPLayer() throws SocketException;

          // Methods 11
     void attachGenerator(PacketGenerator);
     void attachHandler(PacketHandler) throws IOException;
     AddressSpec createAddress(String) throws PacketAddressFormatException;
     PacketAddressMask createAddressMask();
     void detachGenerator(PacketGenerator);
     void detachHandler(PacketHandler);
     void generatorReady(PacketGenerator);
     String getID();
     int getPacketLength();
     void synchronousSend(PacketGenerator, pj_BufferHandle);
     public String toString();

          // Inner Classes 1
     private static class pj_UDPLayer.SocketReader
}

UDPLayer is a protocol layer implementation that runs over UDP.

Author:

Janos Ministry of Development

Fields

· dp	Summary  |  Top

   private final DatagramPacket dp

Datgram wrapper for sending packets. The stupid empty buffer is replaced with the pj_BufferHandle's buffer right before the send.

   private final DatagramSocket ds

Output UDP socket for sending packets.

   private final Hashtable sockets

The table of sockets that we have open for reading, organized by port number.

Constructors

· pj_UDPLayer

Summary  |  Top

   pj_UDPLayer()  throws SocketException

   public String toString() 

Overrides:

toString in class Object

   String getID() 

Overrides:

getID in class pj_ProtocolLayer

   int getPacketLength() 

Overrides:

getPacketLength in class pj_ProtocolLayer

   AddressSpec createAddress(String addr)  throws PacketAddressFormatException

Overrides:

createAddress in class pj_ProtocolLayer

   PacketAddressMask createAddressMask() 

Overrides:

createAddressMask in class pj_ProtocolLayer

   void attachHandler(PacketHandler ph)  throws IOException

   void detachHandler(PacketHandler ph) 

   void attachGenerator(PacketGenerator pg) 

   void synchronousSend(PacketGenerator pg, 
                        pj_BufferHandle bh) 

Synchronous send a packet, blocking until the send completes.

   void generatorReady(PacketGenerator pg) 

Signal to UDP layer that asynchronous packets are available. We just do a synchronous send. :)

   void detachGenerator(PacketGenerator pg) 

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