io.netty.util

Class NetUtil

java.lang.Object

io.netty.util.NetUtil

public final class NetUtil
extends Object

A class that holds a number of network-related constants.

This class borrowed some of its methods from a modified fork of the Inet6Util class which was part of Apache Harmony.

Field Summary

Fields

Modifier and Type	Field and Description
static InetAddress	LOCALHOST The InetAddress representing the host machine We cache this because some machines take almost forever to return from InetAddress.getLocalHost().
static NetworkInterface	LOOPBACK_IF The loopback NetworkInterface on the current machine
static int	SOMAXCONN The SOMAXCONN value of the current machine.

Method Summary

Methods

Modifier and Type	Method and Description
static byte[]	createByteArrayFromIpAddressString(String ipAddressString) Creates an byte[] based on an ipAddressString.
static boolean	isValidIp4Word(String word)
static boolean	isValidIpV4Address(String value) Takes a string and parses it to see if it is a valid IPV4 address.
static boolean	isValidIpV6Address(String ipAddress)

Methods inherited from class java.lang.Object

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

Field Detail

LOCALHOST

public static final InetAddress LOCALHOST

The InetAddress representing the host machine

We cache this because some machines take almost forever to return from InetAddress.getLocalHost(). This may be due to incorrect configuration of the hosts and DNS client configuration files.

LOOPBACK_IF

public static final NetworkInterface LOOPBACK_IF

The loopback NetworkInterface on the current machine

SOMAXCONN

public static final int SOMAXCONN

The SOMAXCONN value of the current machine. If failed to get the value, 3072 is used as a default value.

Method Detail

createByteArrayFromIpAddressString

public static byte[] createByteArrayFromIpAddressString(String ipAddressString)

Creates an byte[] based on an ipAddressString. No error handling is performed here.

isValidIpV6Address

public static boolean isValidIpV6Address(String ipAddress)

isValidIp4Word

public static boolean isValidIp4Word(String word)

isValidIpV4Address

public static boolean isValidIpV4Address(String value)

Takes a string and parses it to see if it is a valid IPV4 address.

Returns:

true, if the string represents an IPV4 address in dotted notation, false otherwise