es.tid.bgp.bgp4.messages

Class BGP4Message

java.lang.Object

es.tid.bgp.bgp4.messages.BGP4Message

All Implemented Interfaces:

BGP4Element

Direct Known Subclasses:

BGP4Keepalive, BGP4Notification, BGP4Open, BGP4Update

public abstract class BGP4Message
extends Object
implements BGP4Element

BGP Message Header Format (RFC 4271).

From RFC 4271, Section 4.1

RFC 4271. From RFC 4271, Section 4.1 4.1. Message Header Format Each message has a fixed-size header. There may or may not be a data portion following the header, depending on the message type. The layout of these fields is shown below:

      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
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                                                               |
      +                                                               +
      |                                                               |
      +                                                               +
      |                           Marker                              |
      +                                                               +
      |                                                               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |          Length               |      Type     |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 

Marker: This 16-octet field is included for compatibility; it MUST be set to all ones. Length: This 2-octet unsigned integer indicates the total length of the message, including the header in octets. Thus, it allows one to locate the (Marker field of the) next message in the TCP stream. The value of the Length field MUST always be at least 19 and no greater than 4096, and MAY be further constrained, depending on the message type. "padding" of extra data after the message is not allowed. Therefore, the Length field MUST have the smallest value required, given the rest of the message. Type: This 1-octet unsigned integer indicates the type code of the message. This document defines the following type codes: 1 - OPEN 2 - UPDATE 3 - NOTIFICATION 4 - KEEPALIVE

Author:

mcs

Field Summary

Fields

Modifier and Type	Field and Description
static int	BGPHeaderLength
static int	BGPMarkerLength
protected static org.slf4j.Logger	log Logger
protected byte[]	messageBytes The bytes of the message

Constructor Summary

Constructors

Constructor and Description
BGP4Message() Default constructor
BGP4Message(byte[] bytes) Creates a PCEP message from a byte array.

Method Summary

Modifier and Type	Method and Description
protected void	encodeHeader()
static int	getBGPHeaderLength()
static int	getBGPMarkerLength()
byte[]	getBytes() Get the message Bytes
int	getLength()
int	getMessageType() Message-Type (8 bits): The following message types are currently defined: Value Meaning 1 Open 2 Update 3 Notification 4 Keepalive
static int	getMessageType(byte[] bytes)
void	setMessageLength(int messageLength)
void	setMessageType(int messageType)

Methods inherited from class java.lang.Object

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

Methods inherited from interface es.tid.bgp.bgp4.BGP4Element

encode

Field Detail

messageBytes

protected byte[] messageBytes

The bytes of the message

log

protected static final org.slf4j.Logger log

Logger

BGPHeaderLength

public static int BGPHeaderLength

BGPMarkerLength

public static int BGPMarkerLength

Constructor Detail

BGP4Message

public BGP4Message()

Default constructor

BGP4Message

public BGP4Message(byte[] bytes)

Creates a PCEP message from a byte array. Decodes the message header

Parameters:

bytes -

Throws:

PCEPProtocolViolationException

Method Detail

setMessageLength

public void setMessageLength(int messageLength)

setMessageType

public void setMessageType(int messageType)

getBytes

public byte[] getBytes()

Get the message Bytes

Specified by:

getBytes in interface BGP4Element

getMessageType

public int getMessageType()

Message-Type (8 bits): The following message types are currently defined: Value Meaning 1 Open 2 Update 3 Notification 4 Keepalive

getMessageType

public static int getMessageType(byte[] bytes)

getLength

public int getLength()

Specified by:

getLength in interface BGP4Element

encodeHeader

protected void encodeHeader()

getBGPMarkerLength

public static int getBGPMarkerLength()

getBGPHeaderLength

public static int getBGPHeaderLength()