es.tid.bgp.bgp4.messages

Class BGP4Update

java.lang.Object

es.tid.bgp.bgp4.messages.BGP4Message

es.tid.bgp.bgp4.messages.BGP4Update

All Implemented Interfaces:

BGP4Element

public class BGP4Update
extends BGP4Message

BGP4 Update Message (RFC 4271).

From RFC 4271 Section 4.3.

RFC 4271. 4.3. UPDATE Message Format UPDATE messages are used to transfer routing information between BGP peers. The information in the UPDATE message can be used to construct a graph that describes the relationships of the various Autonomous Systems. By applying rules to be discussed, routing information loops and some other anomalies may be detected and removed from inter-AS routing. An UPDATE message is used to advertise feasible routes that share common path attributes to a peer, or to withdraw multiple unfeasible routes from service (see 3.1). An UPDATE message MAY simultaneously advertise a feasible route and withdraw multiple unfeasible routes from service. The UPDATE message always includes the fixed-size BGP header, and also includes the other fields, as shown below (note, some of the shown fields may not be present in every UPDATE message):

      +-----------------------------------------------------+
      |   Withdrawn Routes Length (2 octets)                |
      +-----------------------------------------------------+
      |   Withdrawn Routes (variable)                       |
      +-----------------------------------------------------+
      |   Total Path Attribute Length (2 octets)            |
      +-----------------------------------------------------+
      |   Path Attributes (variable)                        |
      +-----------------------------------------------------+
      |   Network Layer Reachability Information (variable) |
      +-----------------------------------------------------+

Author:

mcs,pac

Field Summary

Fields inherited from class es.tid.bgp.bgp4.messages.BGP4Message

BGPHeaderLength, BGPMarkerLength, log, messageBytes

Constructor Summary

Constructors

Constructor and Description
BGP4Update() Construct for encoding
BGP4Update(byte[] bytes) Construct for decoding

Method Summary

Modifier and Type	Method and Description
void	decode()
void	encode() Encode BGP4 Update message
String	getLearntFrom()
NLRI	getNlri()
ArrayList<PathAttribute>	getPathAttributes()
int	getTotalPathAttibuteLength()
WithdrawnRoutes	getWithdrawnRoutes()
int	getWithdrawnRoutesLength()
void	setLearntFrom(String learntFrom)
void	setNlri(NLRI nlri)
void	setPathAttributes(ArrayList<PathAttribute> pathAttribute)
void	setTotalPathAttibuteLength(int totalPathAttibuteLength)
void	setWithdrawnRoutes(WithdrawnRoutes withdrawnRoutes)
void	setWithdrawnRoutesLength(int withdrawnRoutesLength)
String	toString()

Methods inherited from class es.tid.bgp.bgp4.messages.BGP4Message

encodeHeader, getBGPHeaderLength, getBGPMarkerLength, getBytes, getLength, getMessageType, getMessageType, setMessageLength, setMessageType

Methods inherited from class java.lang.Object

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

Constructor Detail

BGP4Update

public BGP4Update()

Construct for encoding

BGP4Update

public BGP4Update(byte[] bytes)

Construct for decoding

Method Detail

encode

public void encode()

Encode BGP4 Update message

decode

public void decode()

getWithdrawnRoutesLength

public int getWithdrawnRoutesLength()

setWithdrawnRoutesLength

public void setWithdrawnRoutesLength(int withdrawnRoutesLength)

getWithdrawnRoutes

public WithdrawnRoutes getWithdrawnRoutes()

setWithdrawnRoutes

public void setWithdrawnRoutes(WithdrawnRoutes withdrawnRoutes)

getTotalPathAttibuteLength

public int getTotalPathAttibuteLength()

setTotalPathAttibuteLength

public void setTotalPathAttibuteLength(int totalPathAttibuteLength)

getPathAttributes

public ArrayList<PathAttribute> getPathAttributes()

setPathAttributes

public void setPathAttributes(ArrayList<PathAttribute> pathAttribute)

getNlri

public NLRI getNlri()

setNlri

public void setNlri(NLRI nlri)

getLearntFrom

public String getLearntFrom()

setLearntFrom

public void setLearntFrom(String learntFrom)

toString

public String toString()

Overrides:

toString in class Object