SSF.OS.OSPF
Class LSA

java.lang.Object
  |
  +--SSF.OS.ProtocolMessage
        |
        +--SSF.OS.OSPF.LSA

public class LSA

extends ProtocolMessage

An OSPF Link State Advertisement packet. It extends an OSPF packet. The following table shows the information that goes into the different fields depending on the LSA packet type:

 
 
TYPE                       LS Identification    Sent by          Received by
 
--------------------------------------------------------------------------------------
 
1 - Router link            OSPF Router ID       each router      rtrs in the same area
 
2 - Network link           IP itrf address of
 
                           network's dest. router
 
3 - Summary link (IP net)  IP network number    Area border rtr  rtrs in the same area
 
4 - Summary link (ASBR)    ASBR OSPF rtr ID     ASB rtr          rtrs in the AS
 
5 - External link          IP network number    AS boundary rtr  rtrs in the AS
 
--------------------------------------------------------------------------------------

 
In RFC 2178, but NOT implemented:

 
1) LS checksum
 
2) length
 
3) Options
 

Field Summary

int	adrtr The advertising router of this LSA.
java.lang.String	adrtrnh
int	age The age of this Link State Advertisement.
static int	AS_EXTERNAL_LSA Indicates an AS External LSA.
java.util.Vector	contents The contents of this LSA packet: a list of link information.
int	id The Link State Identification of this LSA.
static int	NETWORK_LSA Indicates a network-LSA.
static int	ROUTER_LSA Indicates a router-LSA.
int	seqnum The link state sequence number of this LSA header.
static int	SUMMARY_ASBR_LSA Indicates a summary-LSA (ASBR).
static int	SUMMARY_NETWORK_LSA Indicates a summary-LSA (IP network).
byte	typ The type of this Link State Advertisement.

Constructor Summary

LSA(int seq, int t, int lsID, int ar, java.lang.String arnh, java.util.Vector con)
Constructs a Link State Advertisement.

Method Summary

java.lang.String

toString()

Methods inherited from class SSF.OS.ProtocolMessage

bytecount, carryPayload, copy, dropHeader, dropPayload, frombytes, fromVersion, header_bytecount, payload, previous, size, tobytes, version

Methods inherited from class java.lang.Object

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

Field Detail

ROUTER_LSA

public static final int ROUTER_LSA

Indicates a router-LSA.

See Also:

Constant Field Values

NETWORK_LSA

public static final int NETWORK_LSA

Indicates a network-LSA.

See Also:

Constant Field Values

SUMMARY_NETWORK_LSA

public static final int SUMMARY_NETWORK_LSA

Indicates a summary-LSA (IP network).

See Also:

Constant Field Values

SUMMARY_ASBR_LSA

public static final int SUMMARY_ASBR_LSA

Indicates a summary-LSA (ASBR).

See Also:

Constant Field Values

AS_EXTERNAL_LSA

public static final int AS_EXTERNAL_LSA

Indicates an AS External LSA.

See Also:

Constant Field Values

seqnum

public int seqnum

The link state sequence number of this LSA header.

age

public int age

The age of this Link State Advertisement.

typ

public byte typ

The type of this Link State Advertisement.

id

public int id

The Link State Identification of this LSA.

adrtr

public int adrtr

The advertising router of this LSA.

adrtrnh

public java.lang.String adrtrnh

contents

public java.util.Vector contents

The contents of this LSA packet: a list of link information.

Constructor Detail

LSA

public LSA(int seq,
           int t,
           int lsID,
           int ar,
           java.lang.String arnh,
           java.util.Vector con)

Constructs a Link State Advertisement.

Parameters:

seq - LSA sequence number.

t - LSA type.

lsID - Link state ID (OSPF router ID).

ar - The ID of the advertising router.

arnh - The NHI prefix address of the advertising router.

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object