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com.tangosol.net
Class InetAddressHelper

java.lang.Object
com.tangosol.util.Base
com.tangosol.net.InetAddressHelper

public abstract class InetAddressHelper

extends Base

Helper class that encapsulates common InetAddress functionality.

Field Summary

static boolean	PreferIPv4Stack The value of system property "java.net.preferIPv4Stack".
static boolean	PreferIPv6Addresses The value of system property "java.net.preferIPv6Addresses".

Constructor Summary

InetAddressHelper()

Method Summary

static java.util.List	getAllLocalAddresses() Return a list of all InetAddress objects bound to all the network interfaces on this machine.
static java.net.InetAddress	getByAddress(byte[] abAddr) Return an InetAddress object given the raw IP address.
static java.net.InetAddress	getLocalHost() Obtain the local host address.
static boolean	isAnyLocalAddress(java.net.InetAddress addr) Deprecated. As of Coherence 3.0, replaced by InetAddress.isAnyLocalAddress()
static boolean	isLinkLocalAddress(java.net.InetAddress addr) Deprecated. As of Coherence 3.0, replaced by InetAddress.isLinkLocalAddress()
static boolean	isLoopbackAddress(java.net.InetAddress addr) Deprecated. As of Coherence 3.0, replaced by InetAddress.isLoopbackAddress()
static boolean	isSiteLocalAddress(java.net.InetAddress addr) Deprecated. As of Coherence 3.0, replaced by InetAddress.isSiteLocalAddress()
static long	toLong(java.net.InetAddress addr) Converts an IPv4 compatible address to a long value.
static java.lang.String	toString(byte[] ab) Converts a byte array to a raw IP address string representation.
static java.lang.String	toString(java.net.InetAddress addr) Format an IP address string representing the specified InetAddress object.
static boolean	virtuallyEqual(byte[] abAddr1, byte[] abAddr2) Compare specified raw IP addresses taking into account IPv4-compatible IPv6 addresses.

Field Detail

PreferIPv4Stack

public static final boolean PreferIPv4Stack

The value of system property "java.net.preferIPv4Stack".

See Also:

Networking IPv6 User Guide

PreferIPv6Addresses

public static final boolean PreferIPv6Addresses

The value of system property "java.net.preferIPv6Addresses".

See Also:

Networking IPv6 User Guide

Constructor Detail

InetAddressHelper

public InetAddressHelper()

Method Detail

getLocalHost

public static java.net.InetAddress getLocalHost()
                                         throws java.net.UnknownHostException

Obtain the local host address. If at all possible, ensure that the returned address is not a loopback, wildcard or a link local address.

Returns:

the InetAddress that is the best fit for the local host address

Throws:

java.net.UnknownHostException

See Also:

Sun's Bug Parade

getAllLocalAddresses

public static java.util.List getAllLocalAddresses()

Return a list of all InetAddress objects bound to all the network interfaces on this machine.

Returns:

a list of InetAddress objects

isLoopbackAddress

public static boolean isLoopbackAddress(java.net.InetAddress addr)

Deprecated. As of Coherence 3.0, replaced by InetAddress.isLoopbackAddress()

Check whether or not the specified address is a loopback address.

Parameters:

addr - the InetAddress

Returns:

true iff the address is a loopback address

isAnyLocalAddress

public static boolean isAnyLocalAddress(java.net.InetAddress addr)

Deprecated. As of Coherence 3.0, replaced by InetAddress.isAnyLocalAddress()

Check whether or not the specified address is a wildcard address.

Parameters:

addr - the InetAddress

Returns:

true iff the address is a wildcard address

isLinkLocalAddress

public static boolean isLinkLocalAddress(java.net.InetAddress addr)

Deprecated. As of Coherence 3.0, replaced by InetAddress.isLinkLocalAddress()

Check whether or not the specified address is a link local address.

Parameters:

addr - the InetAddress

Returns:

true iff the address is a link local address

isSiteLocalAddress

public static boolean isSiteLocalAddress(java.net.InetAddress addr)

Deprecated. As of Coherence 3.0, replaced by InetAddress.isSiteLocalAddress()

Check whether or not the specified address is a site local address.

Parameters:

addr - the InetAddress

Returns:

true iff the address is a site local address

getByAddress

public static java.net.InetAddress getByAddress(byte[] abAddr)
                                         throws java.net.UnknownHostException

Return an InetAddress object given the raw IP address.

Parameters:

abAddr - the raw IP address in network byte order

Returns:

the InetAddress object

Throws:

java.net.UnknownHostException

virtuallyEqual

public static boolean virtuallyEqual(byte[] abAddr1,
                                     byte[] abAddr2)

Compare specified raw IP addresses taking into account IPv4-compatible IPv6 addresses. Two addresses are considered virtually equal if they have the same protocol (length) and are equal, or if one of them is an IPv6 address that is IPv4-compatible and its IPv4 representation is equal to the other IPv4 address.

Parameters:

abAddr1 - first IP address

abAddr2 - second IP address

Returns:

true iff the addresses are compatible

toLong

public static long toLong(java.net.InetAddress addr)

Converts an IPv4 compatible address to a long value.

Parameters:

addr - an instance of InetAddress to convert to a long

Returns:

a long value holding the IPv4 address

toString

public static java.lang.String toString(byte[] ab)

Converts a byte array to a raw IP address string representation. The format of the address string is one of the following:

• "d.d.d.d" for IPv4 address
• "::d.d.d.d" for IPv4 compatible IPv6 address
• "x:x:x:x:x:x:d.d.d.d" for generic IPv6 address

Parameters:

ab - the byte array holding the IP address

Returns:

the IP address string

See Also:

InetAddress.getHostAddress(), Inet6Address

toString

public static java.lang.String toString(java.net.InetAddress addr)

Format an IP address string representing the specified InetAddress object. The main difference if this method over the addr.toString() call is that this implementation avoids a call to the addr.getHostName() method, which could be very expensive due to the reverse DNS lookup.
For IPv6 addresses this method produces an alternative form of "x:x:x:x:x:x:d.d.d.d" and a compressed form of "::d.d.d.d" for IPv4 compatible addresses (instead of the default form "x:x:x:x:x:x:x:x").

Parameters:

addr - the address for which to format the IP address string

Returns:

the IP address string

See Also:

InetAddress.getHostAddress(), Inet6Address

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