org.onlab.packet

Class ARP

java.lang.Object

org.onlab.packet.BasePacket

org.onlab.packet.ARP

All Implemented Interfaces:

IPacket

public class ARP
extends BasePacket

Representation of an ARP Packet.

Field Summary

Fields

Modifier and Type	Field and Description
protected byte	hardwareAddressLength
protected short	hardwareType
static short	HW_TYPE_ETHERNET
static short	INITIAL_HEADER_LENGTH
static short	OP_RARP_REPLY
static short	OP_RARP_REQUEST
static short	OP_REPLY
static short	OP_REQUEST
protected short	opCode
static short	PROTO_TYPE_IP
protected byte	protocolAddressLength
protected short	protocolType
protected byte[]	senderHardwareAddress
protected byte[]	senderProtocolAddress
protected byte[]	targetHardwareAddress
protected byte[]	targetProtocolAddress

Fields inherited from class org.onlab.packet.BasePacket

parent, payload

Constructor Summary

Constructors

Constructor and Description
ARP()

Method Summary

Modifier and Type	Method and Description
static Ethernet	buildArpReply(Ip4Address srcIp, MacAddress srcMac, Ethernet request) Builds an ARP reply based on a request.
static Ethernet	buildArpRequest(byte[] senderMacAddress, byte[] senderIpAddress, byte[] targetMacAddress, byte[] targetIpAddress, byte[] destinationMacAddress, short vlanId) Builds an ARP request using the supplied parameters.
static Ethernet	buildArpRequest(byte[] senderMacAddress, byte[] senderIpAddress, byte[] targetIpAddress, short vlanId) Builds an ARP request using the supplied parameters.
static Deserializer<ARP>	deserializer() Deserializer function for ARP packets.
ARP	duplicate() Make an exact copy of the ARP packet.
boolean	equals(Object obj)
byte	getHardwareAddressLength()
short	getHardwareType()
short	getOpCode()
byte	getProtocolAddressLength()
short	getProtocolType()
byte[]	getSenderHardwareAddress()
byte[]	getSenderProtocolAddress()
byte[]	getTargetHardwareAddress()
byte[]	getTargetProtocolAddress()
int	hashCode()
boolean	isGratuitous()
byte[]	serialize() Sets all payloads parent packet if applicable, then serializes this packet and all payloads.
ARP	setHardwareAddressLength(byte hwAddressLength)
ARP	setHardwareType(short hwType)
ARP	setOpCode(short op)
ARP	setProtocolAddressLength(byte protoAddressLength)
ARP	setProtocolType(short protoType)
ARP	setSenderHardwareAddress(byte[] senderHWAddress)
ARP	setSenderProtocolAddress(byte[] senderProtoAddress)
ARP	setSenderProtocolAddress(int address)
ARP	setTargetHardwareAddress(byte[] targetHWAddress)
ARP	setTargetProtocolAddress(byte[] targetProtoAddress)
ARP	setTargetProtocolAddress(int address)
String	toString()

Methods inherited from class org.onlab.packet.BasePacket

clone, getParent, getPayload, resetChecksum, setParent, setPayload

Methods inherited from class java.lang.Object

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

Field Detail

HW_TYPE_ETHERNET

public static final short HW_TYPE_ETHERNET

See Also:

Constant Field Values

PROTO_TYPE_IP

public static final short PROTO_TYPE_IP

See Also:

Constant Field Values

OP_REQUEST

public static final short OP_REQUEST

See Also:

Constant Field Values

OP_REPLY

public static final short OP_REPLY

See Also:

Constant Field Values

OP_RARP_REQUEST

public static final short OP_RARP_REQUEST

See Also:

Constant Field Values

OP_RARP_REPLY

public static final short OP_RARP_REPLY

See Also:

Constant Field Values

INITIAL_HEADER_LENGTH

public static final short INITIAL_HEADER_LENGTH

See Also:

Constant Field Values

hardwareType

protected short hardwareType

protocolType

protected short protocolType

hardwareAddressLength

protected byte hardwareAddressLength

protocolAddressLength

protected byte protocolAddressLength

opCode

protected short opCode

senderHardwareAddress

protected byte[] senderHardwareAddress

senderProtocolAddress

protected byte[] senderProtocolAddress

targetHardwareAddress

protected byte[] targetHardwareAddress

targetProtocolAddress

protected byte[] targetProtocolAddress

Constructor Detail

ARP

public ARP()

Method Detail

getHardwareType

public short getHardwareType()

Returns:

the hardwareType

setHardwareType

public ARP setHardwareType(short hwType)

Parameters:

hwType - the hardwareType to set

Returns:

this

getProtocolType

public short getProtocolType()

Returns:

the protocolType

setProtocolType

public ARP setProtocolType(short protoType)

Parameters:

protoType - the protocolType to set

Returns:

this

getHardwareAddressLength

public byte getHardwareAddressLength()

Returns:

the hardwareAddressLength

setHardwareAddressLength

public ARP setHardwareAddressLength(byte hwAddressLength)

Parameters:

hwAddressLength - the hardwareAddressLength to set

Returns:

this

getProtocolAddressLength

public byte getProtocolAddressLength()

Returns:

the protocolAddressLength

setProtocolAddressLength

public ARP setProtocolAddressLength(byte protoAddressLength)

Parameters:

protoAddressLength - the protocolAddressLength to set

Returns:

this

getOpCode

public short getOpCode()

Returns:

the opCode

setOpCode

public ARP setOpCode(short op)

Parameters:

op - the opCode to set

Returns:

this

getSenderHardwareAddress

public byte[] getSenderHardwareAddress()

Returns:

the senderHardwareAddress

setSenderHardwareAddress

public ARP setSenderHardwareAddress(byte[] senderHWAddress)

Parameters:

senderHWAddress - the senderHardwareAddress to set

Returns:

this

getSenderProtocolAddress

public byte[] getSenderProtocolAddress()

Returns:

the senderProtocolAddress

setSenderProtocolAddress

public ARP setSenderProtocolAddress(byte[] senderProtoAddress)

Parameters:

senderProtoAddress - the senderProtocolAddress to set

Returns:

this

setSenderProtocolAddress

public ARP setSenderProtocolAddress(int address)

getTargetHardwareAddress

public byte[] getTargetHardwareAddress()

Returns:

the targetHardwareAddress

setTargetHardwareAddress

public ARP setTargetHardwareAddress(byte[] targetHWAddress)

Parameters:

targetHWAddress - the targetHardwareAddress to set

Returns:

this

getTargetProtocolAddress

public byte[] getTargetProtocolAddress()

Returns:

the targetProtocolAddress

isGratuitous

public boolean isGratuitous()

Returns:

True if gratuitous ARP (SPA = TPA), false otherwise

setTargetProtocolAddress

public ARP setTargetProtocolAddress(byte[] targetProtoAddress)

Parameters:

targetProtoAddress - the targetProtocolAddress to set

Returns:

this

setTargetProtocolAddress

public ARP setTargetProtocolAddress(int address)

serialize

public byte[] serialize()

Description copied from interface: IPacket

Sets all payloads parent packet if applicable, then serializes this packet and all payloads.

Returns:

a byte[] containing this packet and payloads

hashCode

public int hashCode()

Overrides:

hashCode in class BasePacket

equals

public boolean equals(Object obj)

Overrides:

equals in class BasePacket

buildArpRequest

public static Ethernet buildArpRequest(byte[] senderMacAddress,
                                       byte[] senderIpAddress,
                                       byte[] targetMacAddress,
                                       byte[] targetIpAddress,
                                       byte[] destinationMacAddress,
                                       short vlanId)

Builds an ARP request using the supplied parameters.

Parameters:

senderMacAddress - the mac address of the sender

senderIpAddress - the ip address of the sender

targetMacAddress - the mac address of the target

targetIpAddress - the ip address to resolve

destinationMacAddress - the mac address put in Ethernet header

vlanId - the vlan id

Returns:

the Ethernet frame containing the ARP request

buildArpRequest

public static Ethernet buildArpRequest(byte[] senderMacAddress,
                                       byte[] senderIpAddress,
                                       byte[] targetIpAddress,
                                       short vlanId)

Builds an ARP request using the supplied parameters.

Parameters:

senderMacAddress - the mac address of the sender

senderIpAddress - the ip address of the sender

targetIpAddress - the ip address to resolve

vlanId - the vlan id

Returns:

the Ethernet frame containing the ARP request

buildArpReply

public static Ethernet buildArpReply(Ip4Address srcIp,
                                     MacAddress srcMac,
                                     Ethernet request)

Builds an ARP reply based on a request.

Parameters:

srcIp - the IP address to use as the reply source

srcMac - the MAC address to use as the reply source

request - the ARP request we got

Returns:

an Ethernet frame containing the ARP reply

deserializer

public static Deserializer<ARP> deserializer()

Deserializer function for ARP packets.

Returns:

deserializer function

duplicate

public ARP duplicate()

Make an exact copy of the ARP packet.

Returns:

copy of the packet

toString

public String toString()

Overrides:

toString in class Object