org.onlab.packet

Class Ip4Address

java.lang.Object

org.onlab.packet.IpAddress

org.onlab.packet.Ip4Address

All Implemented Interfaces:

Comparable<IpAddress>

public final class Ip4Address
extends IpAddress

A class representing an IPv4 address. This class is immutable.

Nested Class Summary

Nested classes/interfaces inherited from class org.onlab.packet.IpAddress

IpAddress.Version

Field Summary

Fields

Modifier and Type	Field and Description
static int	BIT_LENGTH
static int	BYTE_LENGTH
static IpAddress.Version	VERSION
static Ip4Address	ZERO All-zero unspecified IPv4 address.

Fields inherited from class org.onlab.packet.IpAddress

INET_BIT_LENGTH, INET_BYTE_LENGTH, INET6_BIT_LENGTH, INET6_BYTE_LENGTH

Method Summary

Modifier and Type	Method and Description
static Ip4Address	makeMaskedAddress(Ip4Address address, int prefixLength) Creates an IPv4 address by masking it with a network mask of given mask length.
static Ip4Address	makeMaskPrefix(int prefixLength) Creates an IPv4 network mask prefix.
int	toInt() Returns the integer value of this IPv4 address.
static Ip4Address	valueOf(byte[] value) Converts a byte array into an IPv4 address.
static Ip4Address	valueOf(byte[] value, int offset) Converts a byte array and a given offset from the beginning of the array into an IPv4 address.
static Ip4Address	valueOf(InetAddress inetAddress) Converts an InetAddress into an IPv4 address.
static Ip4Address	valueOf(int value) Converts an integer into an IPv4 address.
static Ip4Address	valueOf(String value) Converts an IPv4 string literal (e.g., "10.2.3.4") into an IP address.

Methods inherited from class org.onlab.packet.IpAddress

byteLength, compareTo, equals, getIp4Address, getIp6Address, hashCode, isIp4, isIp6, isLinkLocal, isMulticast, isSelfAssigned, isZero, makeMaskedAddress, makeMaskPrefix, toInetAddress, toIpPrefix, toOctets, toString, valueOf, valueOf, version

Methods inherited from class java.lang.Object

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

Field Detail

VERSION

public static final IpAddress.Version VERSION

BYTE_LENGTH

public static final int BYTE_LENGTH

See Also:

Constant Field Values

BIT_LENGTH

public static final int BIT_LENGTH

See Also:

Constant Field Values

ZERO

public static final Ip4Address ZERO

All-zero unspecified IPv4 address.

Method Detail

toInt

public int toInt()

Returns the integer value of this IPv4 address.

Returns:

the IPv4 address's value as an integer

valueOf

public static Ip4Address valueOf(int value)

Converts an integer into an IPv4 address.

Parameters:

value - an integer representing an IPv4 address value

Returns:

an IPv4 address

valueOf

public static Ip4Address valueOf(byte[] value)

Converts a byte array into an IPv4 address.

Parameters:

value - the IPv4 address value stored in network byte order (i.e., the most significant byte first)

Returns:

an IPv4 address

Throws:

IllegalArgumentException - if the argument is invalid

valueOf

public static Ip4Address valueOf(byte[] value,
                                 int offset)

Converts a byte array and a given offset from the beginning of the array into an IPv4 address.

The IP address is stored in network byte order (i.e., the most significant byte first).

Parameters:

value - the value to use

offset - the offset in bytes from the beginning of the byte array

Returns:

an IPv4 address

Throws:

IllegalArgumentException - if the arguments are invalid

valueOf

public static Ip4Address valueOf(InetAddress inetAddress)

Converts an InetAddress into an IPv4 address.

Parameters:

inetAddress - the InetAddress value to use. It must contain an IPv4 address

Returns:

an IPv4 address

Throws:

IllegalArgumentException - if the argument is invalid

valueOf

public static Ip4Address valueOf(String value)

Converts an IPv4 string literal (e.g., "10.2.3.4") into an IP address.

Parameters:

value - an IPv4 address value in string form

Returns:

an IPv4 address

Throws:

IllegalArgumentException - if the argument is invalid

makeMaskPrefix

public static Ip4Address makeMaskPrefix(int prefixLength)

Creates an IPv4 network mask prefix.

Parameters:

prefixLength - the length of the mask prefix. Must be in the interval [0, 32]

Returns:

a new IPv4 address that contains a mask prefix of the specified length

Throws:

IllegalArgumentException - if the argument is invalid

makeMaskedAddress

public static Ip4Address makeMaskedAddress(Ip4Address address,
                                           int prefixLength)

Creates an IPv4 address by masking it with a network mask of given mask length.

Parameters:

address - the address to mask

prefixLength - the length of the mask prefix. Must be in the interval [0, 32]

Returns:

a new IPv4 address that is masked with a mask prefix of the specified length

Throws:

IllegalArgumentException - if the prefix length is invalid