java.lang.Object
- org.onlab.packet.BasePacket
- - org.onlab.packet.IP
  - - org.onlab.packet.IPv4

All Implemented Interfaces:

IPacket
```
public class IPv4
extends IP
```
Implements IPv4 packet format.

Field Summary

Fields
Modifier and Type	Field	Description
`protected short`	`checksum`
`protected int`	`destinationAddress`
`protected byte`	`diffServ`
`protected byte`	`flags`
`protected short`	`fragmentOffset`
`protected byte`	`headerLength`
`protected short`	`identification`
`protected boolean`	`isTruncated`
`protected byte[]`	`options`
`protected byte`	`protocol`
`static Map<Byte,Deserializer<? extends IPacket>>`	`PROTOCOL_DESERIALIZER_MAP`
`static byte`	`PROTOCOL_ICMP`
`static byte`	`PROTOCOL_IGMP`
`static byte`	`PROTOCOL_PIM`
`static byte`	`PROTOCOL_TCP`
`static byte`	`PROTOCOL_UDP`
`protected int`	`sourceAddress`
`protected short`	`totalLength`
`protected byte`	`ttl`
`protected byte`	`version`

Fields inherited from class org.onlab.packet.BasePacket
parent, payload

Constructor Summary

Constructors
Constructor Description

IPv4()
Default constructor that sets the version to 4.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static Deserializer<IPv4>`	`deserializer()`	Deserializer function for IPv4 packets.
`boolean`	`equals(Object obj)`
`static String`	`fromIPv4Address(int ipAddress)`	Accepts an IPv4 address and returns of string of the form xxx.xxx.xxx.xxx, e.g., 192.168.0.1.
`static String`	`fromIPv4AddressCollection(Collection<Integer> ipAddresses)`	Accepts a collection of IPv4 addresses as integers and returns a single String useful in toString method's containing collections of IP addresses.
`short`	`getChecksum()`
`int`	`getDestinationAddress()`
`byte`	`getDiffServ()`	Gets the DiffServ octet (including the DSCP and ECN bits).
`byte`	`getDscp()`	Gets the DSCP value (6 bits).
`byte`	`getEcn()`	Gets the ECN value (2 bits).
`byte`	`getFlags()`
`short`	`getFragmentOffset()`
`byte`	`getHeaderLength()`
`short`	`getIdentification()`
`byte[]`	`getOptions()`
`byte`	`getProtocol()`
`int`	`getSourceAddress()`
`short`	`getTotalLength()`
`byte`	`getTtl()`
`byte`	`getVersion()`	Gets IP version number.
`int`	`hashCode()`
`boolean`	`isTruncated()`
`void`	`resetChecksum()`	Reset any checksum as needed, and call resetChecksum on all parents.
`byte[]`	`serialize()`	Serializes the packet.
`IPv4`	`setChecksum(short checksum)`
`IPv4`	`setDestinationAddress(int destinationAddress)`
`IPv4`	`setDestinationAddress(String destinationAddress)`
`IPv4`	`setDiffServ(byte diffServ)`	Sets the DiffServ octet (including the DSCP and ECN bits).
`IPv4`	`setDscp(byte dscp)`	Sets the DSCP value (6 bits).
`IPv4`	`setEcn(byte ecn)`	Sets the ECN value (2 bits).
`IPv4`	`setFlags(byte flags)`
`IPv4`	`setFragmentOffset(short fragmentOffset)`
`IPv4`	`setIdentification(short identification)`
`IPv4`	`setOptions(byte[] options)`
`IPv4`	`setProtocol(byte protocol)`
`IPv4`	`setSourceAddress(int sourceAddress)`
`IPv4`	`setSourceAddress(String sourceAddress)`
`void`	`setTruncated(boolean isTruncated)`
`IPv4`	`setTtl(byte ttl)`
`IPv4`	`setVersion(byte version)`	Sets IP version number.
`static int`	`toIPv4Address(byte[] ipAddress)`	Accepts an IPv4 address in a byte array and returns the corresponding 32-bit integer value.
`static int`	`toIPv4Address(String ipAddress)`	Accepts an IPv4 address of the form xxx.xxx.xxx.xxx, ie 192.168.0.1 and returns the corresponding 32 bit integer.
`static byte[]`	`toIPv4AddressBytes(int ipAddress)`	Accepts an IPv4 address in the form of an integer and returns the corresponding byte array.
`static byte[]`	`toIPv4AddressBytes(String ipAddress)`	Accepts an IPv4 address of the form xxx.xxx.xxx.xxx, ie 192.168.0.1 and returns the corresponding byte array.
`String`	`toString()`

Methods inherited from class org.onlab.packet.BasePacket
clone, getParent, getPayload, setParent, setPayload

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - PROTOCOL_ICMP
```
public static final byte PROTOCOL_ICMP
```
    See Also:
    
    Constant Field Values
  - PROTOCOL_IGMP
```
public static final byte PROTOCOL_IGMP
```
    See Also:
    
    Constant Field Values
  - PROTOCOL_TCP
```
public static final byte PROTOCOL_TCP
```
    See Also:
    
    Constant Field Values
  - PROTOCOL_UDP
```
public static final byte PROTOCOL_UDP
```
    See Also:
    
    Constant Field Values
  - PROTOCOL_PIM
```
public static final byte PROTOCOL_PIM
```
    See Also:
    
    Constant Field Values
  - PROTOCOL_DESERIALIZER_MAP
```
public static final Map<Byte,Deserializer<? extends IPacket>> PROTOCOL_DESERIALIZER_MAP
```
  - version
```
protected byte version
```
  - headerLength
```
protected byte headerLength
```
  - diffServ
```
protected byte diffServ
```
  - totalLength
```
protected short totalLength
```
  - identification
```
protected short identification
```
  - flags
```
protected byte flags
```
  - fragmentOffset
```
protected short fragmentOffset
```
  - ttl
```
protected byte ttl
```
  - protocol
```
protected byte protocol
```
  - checksum
```
protected short checksum
```
  - sourceAddress
```
protected int sourceAddress
```
  - destinationAddress
```
protected int destinationAddress
```
  - options
```
protected byte[] options
```
  - isTruncated
```
protected boolean isTruncated
```
- Constructor Detail
  - IPv4
```
public IPv4()
```
    Default constructor that sets the version to 4.
- Method Detail
  - getVersion
```
public byte getVersion()
```
    Description copied from class: IP
    
    Gets IP version number.
    
    Specified by:
    
    getVersion in class IP
    
    Returns:
    
    IP version number
  - setVersion
```
public IPv4 setVersion(byte version)
```
    Description copied from class: IP
    
    Sets IP version number.
    
    Specified by:
    
    setVersion in class IP
    
    Parameters:
    
    version - the version to set
    
    Returns:
    
    IP class
  - getHeaderLength
```
public byte getHeaderLength()
```
    Returns:
    
    the headerLength
  - getDscp
```
public byte getDscp()
```
    Gets the DSCP value (6 bits).
    
    Returns:
    
    the DSCP value (6 bits)
  - setDscp
```
public IPv4 setDscp(byte dscp)
```
    Sets the DSCP value (6 bits).
    
    Parameters:
    
    dscp - the DSCP value (6 bits)
    
    Returns:
    
    this
  - getEcn
```
public byte getEcn()
```
    Gets the ECN value (2 bits).
    
    Returns:
    
    the ECN value (2 bits)
  - setEcn
```
public IPv4 setEcn(byte ecn)
```
    Sets the ECN value (2 bits).
    
    Parameters:
    
    ecn - the ECN value (2 bits)
    
    Returns:
    
    this
  - getDiffServ
```
public byte getDiffServ()
```
    Gets the DiffServ octet (including the DSCP and ECN bits).
    
    Returns:
    
    the diffServ octet (including the DSCP and ECN bits)
  - setDiffServ
```
public IPv4 setDiffServ(byte diffServ)
```
    Sets the DiffServ octet (including the DSCP and ECN bits).
    
    Parameters:
    
    diffServ - the diffServ octet to set (including the DSCP and ECN bits)
    
    Returns:
    
    this
  - getTotalLength
```
public short getTotalLength()
```
    Returns:
    
    the totalLength
  - getIdentification
```
public short getIdentification()
```
    Returns:
    
    the identification
  - isTruncated
```
public boolean isTruncated()
```
  - setTruncated
```
public void setTruncated(boolean isTruncated)
```
  - setIdentification
```
public IPv4 setIdentification(short identification)
```
    Parameters:
    
    identification - the identification to set
    
    Returns:
    
    this
  - getFlags
```
public byte getFlags()
```
    Returns:
    
    the flags
  - setFlags
```
public IPv4 setFlags(byte flags)
```
    Parameters:
    
    flags - the flags to set
    
    Returns:
    
    this s
  - getFragmentOffset
```
public short getFragmentOffset()
```
    Returns:
    
    the fragmentOffset
  - setFragmentOffset
```
public IPv4 setFragmentOffset(short fragmentOffset)
```
    Parameters:
    
    fragmentOffset - the fragmentOffset to set
    
    Returns:
    
    this
  - getTtl
```
public byte getTtl()
```
    Returns:
    
    the ttl
  - setTtl
```
public IPv4 setTtl(byte ttl)
```
    Parameters:
    
    ttl - the ttl to set
    
    Returns:
    
    this
  - getProtocol
```
public byte getProtocol()
```
    Returns:
    
    the protocol
  - setProtocol
```
public IPv4 setProtocol(byte protocol)
```
    Parameters:
    
    protocol - the protocol to set
    
    Returns:
    
    this
  - getChecksum
```
public short getChecksum()
```
    Returns:
    
    the checksum
  - setChecksum
```
public IPv4 setChecksum(short checksum)
```
    Parameters:
    
    checksum - the checksum to set
    
    Returns:
    
    this
  - resetChecksum
```
public void resetChecksum()
```
    Description copied from interface: IPacket
    
    Reset any checksum as needed, and call resetChecksum on all parents.
    
    Specified by:
    
    resetChecksum in interface IPacket
    
    Overrides:
    
    resetChecksum in class BasePacket
  - getSourceAddress
```
public int getSourceAddress()
```
    Returns:
    
    the sourceAddress
  - setSourceAddress
```
public IPv4 setSourceAddress(int sourceAddress)
```
    Parameters:
    
    sourceAddress - the sourceAddress to set
    
    Returns:
    
    this
  - setSourceAddress
```
public IPv4 setSourceAddress(String sourceAddress)
```
    Parameters:
    
    sourceAddress - the sourceAddress to set
    
    Returns:
    
    this
  - getDestinationAddress
```
public int getDestinationAddress()
```
    Returns:
    
    the destinationAddress
  - setDestinationAddress
```
public IPv4 setDestinationAddress(int destinationAddress)
```
    Parameters:
    
    destinationAddress - the destinationAddress to set
    
    Returns:
    
    this
  - setDestinationAddress
```
public IPv4 setDestinationAddress(String destinationAddress)
```
    Parameters:
    
    destinationAddress - the destinationAddress to set
    
    Returns:
    
    this
  - getOptions
```
public byte[] getOptions()
```
    Returns:
    
    the options
  - setOptions
```
public IPv4 setOptions(byte[] options)
```
    Parameters:
    
    options - the options to set
    
    Returns:
    
    this
  - serialize
```
public byte[] serialize()
```
    Serializes the packet. Will compute and set the following fields if they are set to specific values at the time serialize is called: -checksum : 0 -headerLength : 0 -totalLength : 0
    
    Returns:
    
    a byte[] containing this packet and payloads
  - toIPv4Address
```
public static int toIPv4Address(String ipAddress)
```
    Accepts an IPv4 address of the form xxx.xxx.xxx.xxx, ie 192.168.0.1 and returns the corresponding 32 bit integer.
    
    Parameters:
    
    ipAddress - ip address in string form
    
    Returns:
    
    int ip address value
  - toIPv4Address
```
public static int toIPv4Address(byte[] ipAddress)
```
    Accepts an IPv4 address in a byte array and returns the corresponding 32-bit integer value.
    
    Parameters:
    
    ipAddress - ip address in byte form
    
    Returns:
    
    int ip address value
  - fromIPv4Address
```
public static String fromIPv4Address(int ipAddress)
```
    Accepts an IPv4 address and returns of string of the form xxx.xxx.xxx.xxx, e.g., 192.168.0.1.
    
    Parameters:
    
    ipAddress - ip address in form
    
    Returns:
    
    string form of ip address
  - fromIPv4AddressCollection
```
public static String fromIPv4AddressCollection(Collection<Integer> ipAddresses)
```
    Accepts a collection of IPv4 addresses as integers and returns a single String useful in toString method's containing collections of IP addresses.
    
    Parameters:
    
    ipAddresses - collection
    
    Returns:
    
    ip addresses in comma-separated string form
  - toIPv4AddressBytes
```
public static byte[] toIPv4AddressBytes(String ipAddress)
```
    Accepts an IPv4 address of the form xxx.xxx.xxx.xxx, ie 192.168.0.1 and returns the corresponding byte array.
    
    Parameters:
    
    ipAddress - The IP address in the form xx.xxx.xxx.xxx.
    
    Returns:
    
    The IP address separated into bytes
  - toIPv4AddressBytes
```
public static byte[] toIPv4AddressBytes(int ipAddress)
```
    Accepts an IPv4 address in the form of an integer and returns the corresponding byte array.
    
    Parameters:
    
    ipAddress - The IP address as an integer.
    
    Returns:
    
    The IP address separated into bytes.
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class BasePacket
  - equals
```
public boolean equals(Object obj)
```
    Overrides:
    
    equals in class BasePacket
  - deserializer
```
public static Deserializer<IPv4> deserializer()
```
    Deserializer function for IPv4 packets.
    
    Returns:
    
    deserializer function
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class IPv4

Field Summary

Fields inherited from class org.onlab.packet.BasePacket

Constructor Summary

Method Summary

Methods inherited from class org.onlab.packet.BasePacket

Methods inherited from class java.lang.Object

Field Detail

PROTOCOL_ICMP

PROTOCOL_IGMP

PROTOCOL_TCP

PROTOCOL_UDP

PROTOCOL_PIM

PROTOCOL_DESERIALIZER_MAP

version

headerLength

diffServ

totalLength

identification

flags

fragmentOffset

ttl

protocol

checksum

sourceAddress

destinationAddress

options

isTruncated

Constructor Detail

IPv4

Method Detail

getVersion

setVersion

getHeaderLength

getDscp

setDscp

getEcn

setEcn

getDiffServ

setDiffServ

getTotalLength

getIdentification

isTruncated

setTruncated

setIdentification

getFlags

setFlags

getFragmentOffset

setFragmentOffset

getTtl

setTtl

getProtocol

setProtocol

getChecksum

setChecksum

resetChecksum

getSourceAddress

setSourceAddress

setSourceAddress

getDestinationAddress

setDestinationAddress

setDestinationAddress

getOptions

setOptions

serialize

toIPv4Address

toIPv4Address

fromIPv4Address

fromIPv4AddressCollection

toIPv4AddressBytes

toIPv4AddressBytes

hashCode

equals

deserializer

toString