es.tid.ospf.ospfv2

Class OSPFv2Packet

java.lang.Object

es.tid.ospf.ospfv2.OSPFv2Packet

Direct Known Subclasses:

OSPFv2HelloPacket, OSPFv2LinkStateUpdatePacket

public abstract class OSPFv2Packet
extends Object

Base class for OSPFv2 Packet RFC 2328 OSPF Version 2 April 1998 A.3 OSPF Packet Formats There are five distinct OSPF packet types. All OSPF packet types begin with a standard 24 byte header. This header is described first. Each packet type is then described in a succeeding section. In these sections each packet's division into fields is displayed, and then the field definitions are enumerated. All OSPF packet types (other than the OSPF Hello packets) deal with lists of LSAs. For example, Link State Update packets implement the flooding of LSAs throughout the OSPF routing domain. Because of this, OSPF protocol packets cannot be parsed unless the format of LSAs is also understood. The format of LSAs is described in Section A.4. The receive processing of OSPF packets is detailed in Section 8.2. The sending of OSPF packets is explained in Section 8.1. A.3.1 The OSPF packet header Every OSPF packet starts with a standard 24 byte header. This header contains all the information necessary to determine whether the packet should be accepted for further processing. This determination is described in Section 8.2 of the specification. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Version # | Type | Packet length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Router ID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Area ID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Checksum | AuType | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Authentication | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Authentication | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Version # The OSPF version number. This specification documents version 2 of the protocol. Type The OSPF packet types are as follows. See Sections A.3.2 through A.3.6 for details. Type Description ________________________________ 1 Hello 2 Database Description 3 Link State Request 4 Link State Update 5 Link State Acknowledgment Packet length The length of the OSPF protocol packet in bytes. This length includes the standard OSPF header.

Author:

ogondio

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	bytes
protected static org.slf4j.Logger	log

Constructor Summary

Constructors

Constructor and Description
OSPFv2Packet()
OSPFv2Packet(byte[] bytes, int offset) Decodes the header of a LSA

Method Summary

Modifier and Type	Method and Description
void	encodeOSPFV2PacketHeader()
Inet4Address	getAreaID()
byte[]	getBytes()
int	getLength()
static int	getLSlength(byte[] bytes, int offset)
static int	getLStype(byte[] bytes, int offset) Metodo statico: lenght y type.
Inet4Address	getRouterID()
int	getType()
int	getVersion()
void	setAreaID(Inet4Address areaID)
void	setBytes(byte[] bytes)
void	setLength(int length)
void	setRouterID(Inet4Address routerID)
void	setType(int type)
void	setVersion(int version)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

log

protected static final org.slf4j.Logger log

bytes

protected byte[] bytes

Constructor Detail

OSPFv2Packet

public OSPFv2Packet()

OSPFv2Packet

public OSPFv2Packet(byte[] bytes,
                    int offset)

Decodes the header of a LSA

Parameters:

bytes -

offset -

Method Detail

encodeOSPFV2PacketHeader

public void encodeOSPFV2PacketHeader()

getLStype

public static int getLStype(byte[] bytes,
                            int offset)

Metodo statico: lenght y type.

getLSlength

public static int getLSlength(byte[] bytes,
                              int offset)

getVersion

public int getVersion()

setVersion

public void setVersion(int version)

getType

public int getType()

setType

public void setType(int type)

getLength

public int getLength()

setLength

public void setLength(int length)

getRouterID

public Inet4Address getRouterID()

setRouterID

public void setRouterID(Inet4Address routerID)

getAreaID

public Inet4Address getAreaID()

setAreaID

public void setAreaID(Inet4Address areaID)

getBytes

public byte[] getBytes()

setBytes

public void setBytes(byte[] bytes)