es.tid.bgp.bgp4.messages

Class BGP4Open

java.lang.Object

es.tid.bgp.bgp4.messages.BGP4Message

es.tid.bgp.bgp4.messages.BGP4Open

All Implemented Interfaces:

BGP4Element

public class BGP4Open
extends BGP4Message

BGP Open Message.

BGP Open Message Format (RFC 4271).

From RFC 4271, Section 4.2

RFC 4271. 4.2. OPEN Message Format After a TCP connection is established, the first message sent by each side is an OPEN message. If the OPEN message is acceptable, a KEEPALIVE message confirming the OPEN is sent back. In addition to the fixed-size BGP header, the OPEN message contains the following fields:

       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    |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |     My Autonomous System      |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |           Hold Time           |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |                         BGP Identifier                        |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       | Opt Parm Len  |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |                                                               |
       |             Optional Parameters (variable)                    |
       |                                                               |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Version: This 1-octet unsigned integer indicates the protocol version number of the message. The current BGP version number is 4. My Autonomous System: This 2-octet unsigned integer indicates the Autonomous System number of the sender. Hold Time: This 2-octet unsigned integer indicates the number of seconds the sender proposes for the value of the Hold Timer. Upon receipt of an OPEN message, a BGP speaker MUST calculate the value of the Hold Timer by using the smaller of its configured Hold Time and the Hold Time received in the OPEN message. The Hold Time MUST be either zero or at least three seconds. An implementation MAY reject connections on the basis of the Hold Time. The calculated value indicates the maximum number of seconds that may elapse between the receipt of successive KEEPALIVE and/or UPDATE messages from the sender. BGP Identifier: This 4-octet unsigned integer indicates the BGP Identifier of the sender. A given BGP speaker sets the value of its BGP Identifier to an IP address that is assigned to that BGP speaker. The value of the BGP Identifier is determined upon startup and is the same for every local interface and BGP peer. Optional Parameters Length: This 1-octet unsigned integer indicates the total length of the Optional Parameters field in octets. If the value of this field is zero, no Optional Parameters are present. Optional Parameters: This field contains a list of optional parameters, in which each parameter is encoded as a triplet.

         0                   1
         0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...
         |  Parm. Type   | Parm. Length  |  Parameter Value (variable)
         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...

Parameter Type is a one octet field that unambiguously identifies individual parameters. Parameter Length is a one octet field that contains the length of the Parameter Value field in octets. Parameter Value is a variable length field that is interpreted according to the value of the Parameter Type field. [RFC3392] defines the Capabilities Optional Parameter. The minimum length of the OPEN message is 29 octets (including the message header).

Author:

mcs

Field Summary

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

BGPHeaderLength, BGPMarkerLength, log, messageBytes

Constructor Summary

Constructors

Constructor and Description
BGP4Open() Construct new PCEP Open message from scratch
BGP4Open(byte[] bytes) Construct new PCEP Open message from scratch

Method Summary

Modifier and Type	Method and Description
void	decode()
void	encode()
Inet4Address	getBGPIdentifier()
int	getBGPOpenMessageMandatoryFileds()
int	getHoldTime()
int	getMyAutonomousSystem()
int	getOptionalParameterLength()
LinkedList<BGP4OptionalParameter>	getParametersList()
int	getVersion()
void	setBGPIdentifier(Inet4Address bGPIdentifier)
void	setBGPOpenMessageMandatoryFileds(int bGPOpenMessageMandatoryFileds)
void	setHoldTime(int holdTime)
void	setMyAutonomousSystem(int myAutonomousSystem)
void	setOptionalParameterLength(int optionalParameterLength)
void	setParametersList(LinkedList<BGP4OptionalParameter> parametersList)
void	setVersion(int version)
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

BGP4Open

public BGP4Open()

Construct new PCEP Open message from scratch

BGP4Open

public BGP4Open(byte[] bytes)

Construct new PCEP Open message from scratch

Method Detail

encode

public void encode()

decode

public void decode()

getVersion

public int getVersion()

setVersion

public void setVersion(int version)

getMyAutonomousSystem

public int getMyAutonomousSystem()

setMyAutonomousSystem

public void setMyAutonomousSystem(int myAutonomousSystem)

getHoldTime

public int getHoldTime()

setHoldTime

public void setHoldTime(int holdTime)

getBGPIdentifier

public Inet4Address getBGPIdentifier()

setBGPIdentifier

public void setBGPIdentifier(Inet4Address bGPIdentifier)

getOptionalParameterLength

public int getOptionalParameterLength()

setOptionalParameterLength

public void setOptionalParameterLength(int optionalParameterLength)

getParametersList

public LinkedList<BGP4OptionalParameter> getParametersList()

setParametersList

public void setParametersList(LinkedList<BGP4OptionalParameter> parametersList)

getBGPOpenMessageMandatoryFileds

public int getBGPOpenMessageMandatoryFileds()

setBGPOpenMessageMandatoryFileds

public void setBGPOpenMessageMandatoryFileds(int bGPOpenMessageMandatoryFileds)

toString

public String toString()

Overrides:

toString in class Object