simnet
Class Ping

java.lang.Object
  java.lang.Thread
      simnet.Application
          simnet.Ping

All Implemented Interfaces:

BPFConsumer, Pluggable, PlugoutListener, java.lang.Runnable, SimnetWindowListener

public class Ping

extends Application

implements BPFConsumer, Pluggable

An application which implements Ping.

Field Summary

(package private) BPF

bpf

Fields inherited from class simnet.Application

appid, appstart, frame, initialized, node, NODE_ID, pid, random, sim, win

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Ping()

Method Summary

void	inBPF(int bpf_id, IP_Packet ip_packet) So ping can get responses.
void	ping(int dest) Pings the specified node.
void	ping(java.lang.Integer dest) Pings the specified node.
void	ping(java.lang.String dest) Pings the specified node.
boolean	prePlugout(java.lang.Object replacement) Ping can be removed by getting rid of the bpf rule, or replaced by transferring the BPF rule.

Methods inherited from class simnet.Application

closeWindow, customInit, finalize, getTitleString, initialize, plugoutNotification, printout, printout, processWindowCommand, rawOut, run, 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, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

bpf

BPF bpf

Constructor Detail

Ping

public Ping()

Method Detail

ping

public void ping(int dest)

Pings the specified node. Note that if a ping is outstanding to a node, and a new ping command is issued, the old echo reply will not be printed

Parameters:

dest - the ID of destination node

ping

public void ping(java.lang.String dest)

Pings the specified node. Called direcly from the UserInterface to provide a version of the ping command that takes Node names as arguments.

Parameters:

dest - the ID of destination node

ping

public void ping(java.lang.Integer dest)

Pings the specified node. Called direcly from the UserInterface to provide an rsynflood command.

Parameters:

dest - the ID of destination node

inBPF

public void inBPF(int bpf_id,
                  IP_Packet ip_packet)

So ping can get responses. Note that when an ICMP echo reply is received, the BPF rule is removed. As a result, pings can only be done one at a time.

Specified by:

inBPF in interface BPFConsumer

Parameters:

bpf_id - the ID of the BPF rule that the ip_packet matched

ip_packet - incoming ip_packet from BPF

prePlugout

public boolean prePlugout(java.lang.Object replacement)

Ping can be removed by getting rid of the bpf rule, or replaced by transferring the BPF rule.

Specified by:

prePlugout in interface Pluggable

Returns:

if this object can now be removed (was the operation sucessful)