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org.jwall.object
Class ICMPService  

java.lang.Object
  org.jwall.object.Service
      org.jwall.object.ICMPService

All Implemented Interfaces:

java.lang.Comparable, org.jwall.gui.Enum, FirewallDataEventSource, org.jwall.type.SortedDisplayable

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public class ICMPService

extends Service

This class represents an ICMP service.

The Internet Protocol (IP) is not designed to be absolutely reliable. The purpose of these control messages (ICMP) is to provide feedback about problems in the communication environment, not to make IP reliable.

The Internet Control Message Protocol (ICMP) has many messages that are identified by a "type" field, these are defined by RFCs. Many of the types of ICMP message are now obsolete and are no longer seen in the Internet.

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Field Summary
private  int	code
private  javax.swing.Icon	icon
private static int	protocol
private  int	type

 

Fields inherited from class org.jwall.object.Service

AH, ANY, byName, byType, comment, ESP, ICMP, MAX, MAXPRIVILEDGED, MIN, name, TCP, UDP

 

Constructor Summary
	ICMPService()           Creates a new ICMP service with the null type and null code.
	ICMPService(int type)           Creates a new ICMP service with the given type and code zero.
	ICMPService(int type, int code)           Creates a new ICMP service with the given type and code.
protected	ICMPService(java.lang.String name, java.lang.String comment)           Creates a new ICMP service.

 

Method Summary
boolean	equals(java.lang.Object o)           Determine whether this Object is semantically equal to another Object.
int	getCode()           Returns the ICMP code.
java.lang.String	getCodeDescription()           Gets the description that belongs to the code of this ICMP type.
java.lang.String	getName()           Gets the name of the current ICMP type.
int	getType()           Returns the ICMP type.
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
static boolean	isReserved(int type)           Returns if the type is an unassigned or reserved ICMP type.
java.lang.String	toString()           Returns a string representation of the object.
static ICMPService	valueOf(java.lang.String type, java.lang.String code)           Creates a new ICMP services from the given strings.
static ICMPService	valueOf(java.lang.String name, java.lang.String comment, java.lang.String type, java.lang.String code)

 

Methods inherited from class org.jwall.object.Service

addFirewallDataListener, compareTo, contains, getComment, getIcon, getProtocol, hasComment, removeFirewallDataListener, replaceWith, resKey, setComment, setIcon, setName, setProtocol, wasDeleted, wasModified

 

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

 

Field Detail

protocol

private static final int protocol

See Also:

Constant Field Values

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type

private int type

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code

private int code

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icon

private final javax.swing.Icon icon

Constructor Detail

ICMPService

protected ICMPService(java.lang.String name,
                      java.lang.String comment)

Creates a new ICMP service.

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ICMPService

public ICMPService(int type,
                   int code)

Creates a new ICMP service with the given type and code.

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ICMPService

public ICMPService(int type)

Creates a new ICMP service with the given type and code zero.

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ICMPService

public ICMPService()

Creates a new ICMP service with the null type and null code.

Method Detail

getType

public int getType()

Returns the ICMP type.

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getCode

public int getCode()

Returns the ICMP code.

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valueOf

public static final ICMPService valueOf(java.lang.String type,
                                        java.lang.String code)

Creates a new ICMP services from the given strings.

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valueOf

public static final ICMPService valueOf(java.lang.String name,
                                        java.lang.String comment,
                                        java.lang.String type,
                                        java.lang.String code)

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getName

public java.lang.String getName()

Gets the name of the current ICMP type. The returned value is equal to the name defined in the RFCs for this ICMP type.

Overrides:

getName in class Service

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getCodeDescription

public java.lang.String getCodeDescription()

Gets the description that belongs to the code of this ICMP type.

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isReserved

public static boolean isReserved(int type)

Returns if the type is an unassigned or reserved ICMP type. This method can be used as a helper method, e.g. for only showing serives that are common

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toString

public java.lang.String toString()

Returns a string representation of the object. This is identical to getName().

Overrides:

toString in class Service

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equals

public boolean equals(java.lang.Object o)

Description copied from class: java.lang.Object

Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

• It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
• It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
• It must be reflexive. a.equals(a) must always be true.
• It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
• a.equals(null) must be false.
• It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a java.lang.ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a java.lang.NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, java.util.IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

Overrides:

equals in class Service

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hashCode

public int hashCode()

Description copied from class: java.lang.Object

Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

• Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
• It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

Overrides:

hashCode in class Service

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