simnet
Class AggregateRouter

java.lang.Object
  java.lang.Thread
      simnet.Node
          simnet.Router
              simnet.AggregateRouter

All Implemented Interfaces:

Pluggable, java.lang.Runnable, SimnetWindowListener

public class AggregateRouter

extends Router

A router that simulates a having a subnet attached to it.

Nested Class Summary

private class

AggregateRouter.Subnet

Field Summary

protected AggregateRouter.Subnet[]	subnets Array of our subnets.
protected int	total_hosts Total hosts in all subnets

Fields inherited from class simnet.Router

fixed_bits

Fields inherited from class simnet.Node

applications, default_plugins_loaded, frame, frozen, id, in_filters, in_links, ipid, isNatted, keep_going, name, natGW, ns, out_filters, out_links, pause, proc, random, resolver, routing_table, running, sim, sleeping, transports, ui, win

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

AggregateRouter()

Method Summary

protected void	forward(IP_Packet ip_packet) Forward a packet as normal, unless it is in our subnet and not for us - in that case, silently drop the packet.
int	getHopCount(int ip) Returns the number of hops to an IP if it exists within our subnet, or -1 if that IP does not exist.
int	getSubnet(int ip) Returns the subnet number the IP address is in, or -1 if that subnet doesn't exist or is outside the router's subnet.
int	getSubnetCount() Return the number of /24 subnets based on our fixed_bits.
void	initialize(int router_id, java.lang.String name) Initializes a new Router by setting its ID, name, node class (Router) and a pointer to the Simulator.
boolean	isSubnetPresent(int num) Does the specfied subnet number (NOT IP) exist?

Methods inherited from class simnet.Router

getFixedBits, getNodeClass, setFixedBits

Methods inherited from class simnet.Node

addBPF, addLink, addRule, clear, closeWindow, command, command, deleteRule, empty, finalize, getApplication, getHostByName, getLink, getPluginCount, getTitleString, getTransport, getTransport, integrate, isolate, kill, lookup, lookup, out, prePlugout, printout, printout, processWindowCommand, removeBPF, removeLink, run, setupNAT, start, stateful_kill, stateful_start, toString, toString, window

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, stop, stop, suspend, yield

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

subnets

protected AggregateRouter.Subnet[] subnets

Array of our subnets.

total_hosts

protected int total_hosts

Total hosts in all subnets

Constructor Detail

AggregateRouter

public AggregateRouter()

Method Detail

initialize

public void initialize(int router_id,
                       java.lang.String name)

Initializes a new Router by setting its ID, name, node class (Router) and a pointer to the Simulator.

Overrides:

initialize in class Router

Parameters:

router_id - ID of new node

name - name of new node

getSubnetCount

public int getSubnetCount()

Return the number of /24 subnets based on our fixed_bits.

forward

protected void forward(IP_Packet ip_packet)

Forward a packet as normal, unless it is in our subnet and not for us - in that case, silently drop the packet. Not checking if the TTL is OK, or the IP actually exists...

Overrides:

forward in class Router

Parameters:

ip_packet - incoming IP packet to be forwarded

getSubnet

public int getSubnet(int ip)

Returns the subnet number the IP address is in, or -1 if that subnet doesn't exist or is outside the router's subnet.

isSubnetPresent

public boolean isSubnetPresent(int num)

Does the specfied subnet number (NOT IP) exist?

getHopCount

public int getHopCount(int ip)

Returns the number of hops to an IP if it exists within our subnet, or -1 if that IP does not exist.