org.opengts.util
Class IPTools

java.lang.Object
  org.opengts.util.IPTools

public class IPTools
extends java.lang.Object

A set of tools for handling IP Adresses

Nested Class Summary

static class	IPTools.IPAddress IPAddress class
static class	IPTools.IPAddressList Manages a list of IP address blocks

Field Summary

static java.lang.String	HOST_UNKNOWN
static java.lang.String	IP_ADDR_ALL
protected static long	IP_ADDR_MASK
protected static int	IP_ADDR_SIZE
static java.lang.String	IPAddressSeparator
static char	IPAddressSeparatorChar

Constructor Summary

IPTools()

Method Summary

protected static long	_parseIPAddress(java.lang.String ipAddr) Parses the specified IP address into it's binary form
protected static long	_parseIPMask(int m) Parses an IP subnet mask [CHECK](better wording?)
static java.lang.String	getHostName() Retruns name of the local host
static java.lang.String	getIPAddress(java.lang.String hostName) Gets the IP adress of a specified host name though a DNS lookup
static boolean	isValidIPAddress(java.lang.String ipAddr) Returns true if the specified IP address is valid
static void	main(java.lang.String[] argv) Main entry point for testing/debugging
static long[]	parseIPAddress(java.lang.String ipAddr) Parses the specified IPAddress/Mask and returns the result in a 2-element array

Methods inherited from class java.lang.Object

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

Field Detail

HOST_UNKNOWN

public static final java.lang.String HOST_UNKNOWN

See Also:

Constant Field Values

IP_ADDR_ALL

public static final java.lang.String IP_ADDR_ALL

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Constant Field Values

IPAddressSeparatorChar

public static final char IPAddressSeparatorChar

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Constant Field Values

IPAddressSeparator

public static final java.lang.String IPAddressSeparator

IP_ADDR_SIZE

protected static final int IP_ADDR_SIZE

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Constant Field Values

IP_ADDR_MASK

protected static final long IP_ADDR_MASK

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Constant Field Values

Constructor Detail

IPTools

public IPTools()

Method Detail

getHostName

public static java.lang.String getHostName()

Retruns name of the local host

Returns:

The local host name

getIPAddress

public static java.lang.String getIPAddress(java.lang.String hostName)

Gets the IP adress of a specified host name though a DNS lookup

Parameters:

hostName - The specified host name

Returns:

the IP adress of the specified host, or an empty string

isValidIPAddress

public static boolean isValidIPAddress(java.lang.String ipAddr)

Returns true if the specified IP address is valid

Parameters:

ipAddr - The String representation of an IP address

Returns:

True if the specified IP address is valid, false otherwise.

_parseIPAddress

protected static long _parseIPAddress(java.lang.String ipAddr)

Parses the specified IP address into it's binary form

Parameters:

ipAddr - The IP adress to parse as a string

Returns:

The parsed IP adress

_parseIPMask

protected static long _parseIPMask(int m)

Parses an IP subnet mask [CHECK](better wording?)

Parameters:

m - The length of the adress section

Returns:

The parsed IP subnet mask

parseIPAddress

public static long[] parseIPAddress(java.lang.String ipAddr)

Parses the specified IPAddress/Mask and returns the result in a 2-element array

Parameters:

ipAddr - The specified IPAddress/Mask

Returns:

A 2-element array containing the parsed IP address and mask

main

public static void main(java.lang.String[] argv)

Main entry point for testing/debugging

Parameters:

argv - Comand-line arguments