org.onlab.packet

Class UDP

java.lang.Object

org.onlab.packet.BasePacket

org.onlab.packet.UDP

All Implemented Interfaces:

IPacket

public class UDP
extends BasePacket

Representation of a UDP packet.

Field Summary

Fields

Modifier and Type	Field and Description
protected short	checksum
protected int	destinationPort
static int	DHCP_CLIENT_PORT
static int	DHCP_SERVER_PORT
protected short	length
static Map<Integer,Deserializer<? extends IPacket>>	PORT_DESERIALIZER_MAP
protected int	sourcePort

Fields inherited from class org.onlab.packet.BasePacket

parent, payload

Constructor Summary

Constructors

Constructor and Description
UDP()

Method Summary

Modifier and Type	Method and Description
IPacket	deserialize(byte[] data, int offset, int length) Deserializes this packet layer and all possible payloads.
static Deserializer<UDP>	deserializer() Deserializer function for UDP packets.
boolean	equals(Object obj)
short	getChecksum()
int	getDestinationPort()
short	getLength()
int	getSourcePort()
int	hashCode()
void	resetChecksum() Reset any checksums as needed, and call resetChecksum on all parents.
byte[]	serialize() Serializes the packet.
UDP	setChecksum(short checksum)
UDP	setDestinationPort(int destinationPort)
UDP	setSourcePort(int sourcePort)

Methods inherited from class org.onlab.packet.BasePacket

clone, getParent, getPayload, setParent, setPayload

Methods inherited from class java.lang.Object

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

Field Detail

PORT_DESERIALIZER_MAP

public static final Map<Integer,Deserializer<? extends IPacket>> PORT_DESERIALIZER_MAP

DHCP_SERVER_PORT

public static final int DHCP_SERVER_PORT

See Also:

Constant Field Values

DHCP_CLIENT_PORT

public static final int DHCP_CLIENT_PORT

See Also:

Constant Field Values

sourcePort

protected int sourcePort

destinationPort

protected int destinationPort

length

protected short length

checksum

protected short checksum

Constructor Detail

UDP

public UDP()

Method Detail

getSourcePort

public int getSourcePort()

Returns:

the sourcePort

setSourcePort

public UDP setSourcePort(int sourcePort)

Parameters:

sourcePort - the sourcePort to set (16 bits unsigned integer)

Returns:

this

getDestinationPort

public int getDestinationPort()

Returns:

the destinationPort

setDestinationPort

public UDP setDestinationPort(int destinationPort)

Parameters:

destinationPort - the destinationPort to set (16 bits unsigned integer)

Returns:

this

getLength

public short getLength()

Returns:

the length

getChecksum

public short getChecksum()

Returns:

the checksum

setChecksum

public UDP setChecksum(short checksum)

Parameters:

checksum - the checksum to set

Returns:

this

resetChecksum

public void resetChecksum()

Description copied from interface: IPacket

Reset any checksums as needed, and call resetChecksum on all parents.

Specified by:

resetChecksum in interface IPacket

Overrides:

resetChecksum in class BasePacket

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 -length : 0

Returns:

a byte[] containing this packet and payloads

deserialize

public IPacket deserialize(byte[] data,
                           int offset,
                           int length)

Description copied from interface: IPacket

Deserializes this packet layer and all possible payloads. NOTE: This method has been deprecated and will be removed in a future release. It is now recommended to use the Deserializer function provided by the deserialize() method on each packet to deserialize them. The Deserializer functions are robust to malformed input.

Parameters:

data - bytes to deserialize

offset - offset to start deserializing from

length - length of the data to deserialize

Returns:

the deserialized data

hashCode

public int hashCode()

Overrides:

hashCode in class BasePacket

equals

public boolean equals(Object obj)

Overrides:

equals in class BasePacket

deserializer

public static Deserializer<UDP> deserializer()

Deserializer function for UDP packets.

Returns:

deserializer function