Package org.eblocker.server.common.util

Class IpUtils

java.lang.Object

org.eblocker.server.common.util.IpUtils

public class IpUtils
extends Object

Utility functions that can deal with both IPv4 and IPv6 addresses.

Constructor Summary

Constructors

Constructor	Description
IpUtils()

Method Summary

Modifier and Type	Method	Description
static boolean	isIPAddress(String address)	Returns true if a string is an IPv4 or IPv6 address.
static boolean	isIpRange(String ipRange)	Returns true if a string is an IPv4 or IPv6 range in CIDR notation.
static String	shrinkIpRange(String ipRange)	Shrinks an IP range to a reasonable limit.

Methods inherited from class java.lang.Object

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

Constructor Details

IpUtils

public IpUtils()

Method Details

shrinkIpRange

public static String shrinkIpRange(String ipRange)

Shrinks an IP range to a reasonable limit. An IPv4 prefix must be at least 8 bits while an IPv6 prefix must be at least 32 bits.

Parameters:

ipRange - IP range in CIDR notation, e.g. 17.0.0.0/8 or 2603:1000::/25

Returns:

resulting IP range in CIDR notation

isIpRange

public static boolean isIpRange(String ipRange)

Returns true if a string is an IPv4 or IPv6 range in CIDR notation.

isIPAddress

public static boolean isIPAddress(String address)

Returns true if a string is an IPv4 or IPv6 address.