es.tid.bgp.bgp4.update.tlv

Class BGP4TLVFormat

java.lang.Object

es.tid.bgp.bgp4.update.tlv.BGP4TLVFormat

Direct Known Subclasses:

AdministrativeGroupLinkAttribTLV, DefaultTEMetricLinkAttribTLV, IGPFlagBitsPrefixAttribTLV, IPReachabilityInformationPrefixDescriptorSubTLV, IPv4InterfaceAddressLinkDescriptorsSubTLV, IPv4NeighborAddressLinkDescriptorSubTLV, IPv4RouterIDLocalNodeLinkAttribTLV, IPv4RouterIDLocalNodeNodeAttribTLV, IPv4RouterIDRemoteNodeLinkAttribTLV, IPv6InterfaceAddressLinkDescriptorSubTLV, IPv6NeighborAddressLinkDescriptorSubTLV, IS_IS_AreaIdentifierNodeAttribTLV, LinkLocalRemoteIdentifiersLinkDescriptorSubTLV, LinkProtectionTypeLinkAttribTLV, LocalNodeDescriptorsTLV, MaximumLinkBandwidthLinkAttribTLV, MaxReservableBandwidthLinkAttribTLV, MetricLinkAttribTLV, MF_OTPAttribTLV, MultiTopologyIDLinkDescriptorSubTLV, NodeFlagBitsNodeAttribTLV, NodeNameNodeAttribTLV, OSPFForwardingAddressPrefixAttribTLV, OSPFRouteTypePrefixDescriptorSubTLV, PrefixMetricPrefixAttribTLV, RemoteNodeDescriptorsTLV, RouteTagPrefixAttribTLV, SharedRiskLinkGroupAttribTLV, SidLabelNodeAttribTLV, TransceiverClassAndAppAttribTLV, UnreservedBandwidthLinkAttribTLV

public abstract class BGP4TLVFormat
extends Object

Information in the new link state NLRIs and attributes is encoded in Type/Length/Value triplets. The TLV format is shown in Figure 4.

      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
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |              Type             |             Length            |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                                                               |
     |                         Value (variable)                      |
     |                                                               |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Figure 4: TLV format The Length field defines the length of the value portion in octets (thus a TLV with no value portion would have a length of zero). The TLV is not padded to four-octet alignment; Unrecognized types are ignored.

Author:

pac

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.slf4j.Logger	log
protected byte[]	tlv_bytes
protected int	TLVType
protected int	TLVValueLength
protected int	TotalTLVLength

Constructor Summary

Constructors

Constructor and Description
BGP4TLVFormat()
BGP4TLVFormat(byte[] bytes, int offset)

Method Summary

Modifier and Type	Method and Description
abstract void	encode()
protected void	encodeHeader()
byte[]	getTlv_bytes()
static int	getTLVLength(byte[] bytes, int offset)
int	getTLVType()
int	getTLVValueLength()
int	getTotalTLVLength()
static int	getTotalTLVLength(byte[] bytes, int offset)
static int	getType(byte[] bytes, int offset)
protected void	setTlv_bytes(byte[] tlv_bytes)
protected void	setTLVType(int tLVType)
protected void	setTLVValueLength(int TLVValueLength) Sets the lenght of the VALUE of the TLV.

Methods inherited from class java.lang.Object

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

Field Detail

TLVType

protected int TLVType

TLVValueLength

protected int TLVValueLength

TotalTLVLength

protected int TotalTLVLength

tlv_bytes

protected byte[] tlv_bytes

log

protected static final org.slf4j.Logger log

Constructor Detail

BGP4TLVFormat

public BGP4TLVFormat()

BGP4TLVFormat

public BGP4TLVFormat(byte[] bytes,
                     int offset)

Method Detail

encodeHeader

protected void encodeHeader()

getTLVValueLength

public int getTLVValueLength()

getTotalTLVLength

public int getTotalTLVLength()

getTotalTLVLength

public static int getTotalTLVLength(byte[] bytes,
                                    int offset)

getTLVLength

public static int getTLVLength(byte[] bytes,
                               int offset)

getType

public static int getType(byte[] bytes,
                          int offset)

getTLVType

public int getTLVType()

setTLVType

protected void setTLVType(int tLVType)

getTlv_bytes

public byte[] getTlv_bytes()

setTlv_bytes

protected void setTlv_bytes(byte[] tlv_bytes)

setTLVValueLength

protected void setTLVValueLength(int TLVValueLength)

Sets the lenght of the VALUE of the TLV. The total length is computed!!!

Parameters:

TLVValueLength -

encode

public abstract void encode()