es.tid.pce.pcep.objects

Class BandwidthRequested

java.lang.Object

es.tid.pce.pcep.objects.PCEPObject

es.tid.pce.pcep.objects.Bandwidth

es.tid.pce.pcep.objects.BandwidthRequested

All Implemented Interfaces:

PCEPElement

public class BandwidthRequested
extends Bandwidth

Represents a PCEP BANDWIDTH object, as defined in RFC 5440.

From RFC 5440 Section 7.7. BANDWIDTH Object:

The BANDWIDTH object is used to specify the requested bandwidth for a TE LSP. The notion of bandwidth is similar to the one used for RSVP signaling in [RFC2205], [RFC3209], and [RFC3473].

If the requested bandwidth is equal to 0, the BANDWIDTH object is optional. Conversely, if the requested bandwidth is not equal to 0, the PCReq message MUST contain a BANDWIDTH object.

In the case of the reoptimization of a TE LSP, the bandwidth of the existing TE LSP MUST also be included in addition to the requested bandwidth if and only if the two values differ. Consequently, two Object-Type values are defined that refer to the requested bandwidth and the bandwidth of the TE LSP for which a reoptimization is being performed.

The BANDWIDTH object may be carried within PCReq and PCRep messages. BANDWIDTH Object-Class is 5.

Two Object-Type values are defined for the BANDWIDTH object:

  o  Requested bandwidth: BANDWIDTH Object-Type is 1.

  o  Bandwidth of an existing TE LSP for which a reoptimization is
     requested.  BANDWIDTH Object-Type is 2.

 The format of the BANDWIDTH object body is as follows:

  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
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                        Bandwidth                              |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 
                 Figure 14: BANDWIDTH Object Body Format
 

Bandwidth (32 bits): The requested bandwidth is encoded in 32 bits in IEEE floating point format (see [IEEE.754.1985]), expressed in bytes per second. Refer to Section 3.1.2 of [RFC3471] for a table of commonly used values.

The BANDWIDTH object body has a fixed length of 4 bytes.

Version:

0.1

Author:

Carlos Garcia Argos (cgarcia@novanotio.es) (Feb. 17 2010), Oscar Gonzalez de Dios (ogondio@tid.es) (Nov. 29 2010)

Field Summary

Fields

Modifier and Type	Field and Description
float	bw Bandwidth (32 bits): The requested bandwidth is encoded in 32 bits in IEEE floating point format (see [IEEE.754.1985]), expressed in bytes per second.

Fields inherited from class es.tid.pce.pcep.objects.PCEPObject

Ibit, log, object_bytes, ObjectClass, ObjectLength, OT, Pbit, Res

Constructor Summary

Constructors

Constructor and Description
BandwidthRequested() Constructs a Bandwidth object
BandwidthRequested(byte[] bytes, int offset) Constructs a PCEP object from a sequence of bytes

Method Summary

Modifier and Type	Method and Description
void	decode() Decodes the BANDWDITH object
Bandwidth	duplicate()
void	encode() Encodes the PCEP BANDWIDTH object
boolean	equals(Object obj)
float	getBw() Gets the requested bandwidth
int	hashCode()
void	setBw(float bw) Sets the requested bandwidth
String	toString()

Methods inherited from class es.tid.pce.pcep.objects.PCEPObject

decode, decodeHeader, encode_header, getBytes, getLength, getObject_bytes, getObjectClass, getObjectClass, getObjectLength, getObjectType, getOT, getRes, isIbit, isPbit, setIbit, setObject_bytes, setObjectClass, setObjectLength, setOT, setPbit, setRes, supportedObject

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

bw

public float bw

Bandwidth (32 bits): The requested bandwidth is encoded in 32 bits in IEEE floating point format (see [IEEE.754.1985]), expressed in bytes per second. Refer to Section 3.1.2 of [RFC3471] for a table of commonly used values.

Constructor Detail

BandwidthRequested

public BandwidthRequested()

Constructs a Bandwidth object

BandwidthRequested

public BandwidthRequested(byte[] bytes,
                          int offset)
                   throws MalformedPCEPObjectException

Constructs a PCEP object from a sequence of bytes

Parameters:

bytes - Sequence of bytes where the object is present

offset - Position at which the object starts

Throws:

MalformedPCEPObjectException

Method Detail

encode

public void encode()

Encodes the PCEP BANDWIDTH object

Specified by:

encode in interface PCEPElement

Specified by:

encode in class PCEPObject

decode

public void decode()
            throws MalformedPCEPObjectException

Decodes the BANDWDITH object

Specified by:

decode in class PCEPObject

Throws:

MalformedPCEPObjectException

getBw

public float getBw()

Gets the requested bandwidth

Returns:

Bandwidth

setBw

public void setBw(float bw)

Sets the requested bandwidth

Parameters:

bw - Requested Bandwidth

toString

public String toString()

Overrides:

toString in class Object

duplicate

public Bandwidth duplicate()

Specified by:

duplicate in class Bandwidth

hashCode

public int hashCode()

Overrides:

hashCode in class PCEPObject

equals

public boolean equals(Object obj)

Overrides:

equals in class PCEPObject