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Class JavaGroups.JavaStack.Protocols.TUNNEL 

java.lang.Object
   |
   +----JavaGroups.JavaStack.Protocol
           |
           +----JavaGroups.JavaStack.Protocols.TUNNEL
public class TUNNEL
extends Protocol
implements Runnable
Replacement for UDP. Instead of sending packets via UDP, a TCP connection is opened to a Router (using the RouterStub client-side stub), the IP address/port of which was given using channel properties router_host and router_port. All outgoing traffic is sent via this TCP socket to the Router which distributes it to all connected TUNNELs in this group. Incoming traffic received from Router will simply be passed up the stack.

A TUNNEL layer can be used to penetrate a firewall, most firewalls allow creating TCP connections to the outside world, however, they do not permit outside hosts to initiate a TCP connection to a host inside the firewall. Therefore, the connection created by the inside host is reused by Router to send traffic from an outside host to a host inside the firewall.

Constructor Index

o TUNNEL()

Method Index

o Down(Event)
Caller by the layer above this layer.
o GetName()
o HandleIncomingMessage(Message)
o run()
o SetProperties(Properties)
Setup the Protocol instance acording to the configuration string
o toString()
o Up(Event)
An event was received from the layer below.

Constructors

o TUNNEL 
 public TUNNEL()

Methods

o toString 
 public String toString()
Overrides:
toString in class Object
o HandleIncomingMessage 
 public synchronized void HandleIncomingMessage(Message msg)
o run 
 public void run()
o GetName 
 public String GetName()
Overrides:
GetName in class Protocol
o SetProperties 
 public boolean SetProperties(Properties props)
Setup the Protocol instance acording to the configuration string

Overrides:
SetProperties in class Protocol
o Up 
 public void Up(Event evt)
An event was received from the layer below.

Overrides:
Up in class Protocol
o Down 
 public synchronized void Down(Event evt)
Caller by the layer above this layer. We just pass it on to the router.

Overrides:
Down in class Protocol 
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