SSF.OS.BGP4.Path
Class NextHop

java.lang.Object
  |
  +--SSF.OS.BGP4.Path.Attribute
        |
        +--SSF.OS.BGP4.Path.NextHop

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable

public class NextHop

extends Attribute

The next hop path attribute. It describes the next hop in the path, which is an IP address. It is well-known and mandatory.

See Also:

Serialized Form

Field Summary

static java.lang.String	dmlname The name of the path attribute as a DML attribute.
IPaddress	ipaddr The next hop IP address.
static java.lang.String	name The name of the attribute as a string.
static java.lang.String	nhidmlname The name of the NHI form of the path attribute as a DML attribute.
static int	TYPECODE The next hop path attribute type code.

Fields inherited from class SSF.OS.BGP4.Path.Attribute

dmlnames, MAX_TYPECODE, MIN_TYPECODE, names, nhidmlnames, undefined

Constructor Summary

NextHop()
Empty constructor.

NextHop(IPaddress ipa)
Constructs a next hop path attribute with the given IP address.

Method Summary

int	bytecount() Returns the number of octets (bytes) needed to represent this next hop path attribute in an update message.
Attribute	copy() Constructs and returns a copy of the attribute.
boolean	equals(Attribute attrib) Determines whether or not this path attribute is equivalent to another.
boolean	opt() Returns whether the path attribute is optional (true) or well-known (false).
boolean	partial() Returns whether or not the information contained in the optional transitive attribute is partial (true) or complete (false).
void	readExternal(java.io.DataInput in) Reads the contents of this object from a serialization stream.
void	readExternal(java.io.ObjectInput in)
java.lang.String	toString() Returns this path attribute as a string.
boolean	trans() Returns whether an optional attribute is transitive (true) or non-transitive (false).
void	writeExternal(java.io.DataOutput out) Writes the contents of this object to a serialization stream.
void	writeExternal(java.io.ObjectOutput out) Writes the contents of this object to a data stream.

Methods inherited from class java.lang.Object

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

Field Detail

TYPECODE

public static final int TYPECODE

The next hop path attribute type code.

See Also:

Constant Field Values

name

public static final java.lang.String name

The name of the attribute as a string.

See Also:

Constant Field Values

dmlname

public static final java.lang.String dmlname

The name of the path attribute as a DML attribute.

See Also:

Constant Field Values

nhidmlname

public static final java.lang.String nhidmlname

The name of the NHI form of the path attribute as a DML attribute.

See Also:

Constant Field Values

ipaddr

public IPaddress ipaddr

The next hop IP address.

Constructor Detail

NextHop

public NextHop()

Empty constructor. Used to deserialize this object.

NextHop

public NextHop(IPaddress ipa)

Constructs a next hop path attribute with the given IP address.

Parameters:

ipa - The IP address of the next hop.

Method Detail

copy

public Attribute copy()

Constructs and returns a copy of the attribute.

Specified by:

copy in class Attribute

Returns:

a copy of the attribute

opt

public final boolean opt()

Description copied from class: Attribute

Returns whether the path attribute is optional (true) or well-known (false).

Specified by:

opt in class Attribute

trans

public final boolean trans()

Description copied from class: Attribute

Returns whether an optional attribute is transitive (true) or non-transitive (false). For well-known attributes it must be true.

Specified by:

trans in class Attribute

partial

public final boolean partial()

Description copied from class: Attribute

Returns whether or not the information contained in the optional transitive attribute is partial (true) or complete (false). For well-known attributes and for optional non-transitive attributes, it must be false.

Specified by:

partial in class Attribute

bytecount

public int bytecount()

Returns the number of octets (bytes) needed to represent this next hop path attribute in an update message. The number is the sum of the two octets needed for the attribute type (which contains attribute flags and the attribute type code), the one octets needed for the attribute length, and the four octets needed for the attribute value.

Specified by:

bytecount in class Attribute

Returns:

the number of octets (bytes) needed to represent this next hop path attribute in an update message

equals

public boolean equals(Attribute attrib)

Determines whether or not this path attribute is equivalent to another.

Specified by:

equals in class Attribute

Parameters:

attrib - A path attribute to compare to this one.

Returns:

true only if the two attributes are equivalent

toString

public final java.lang.String toString()

Returns this path attribute as a string.

Overrides:

toString in class java.lang.Object

Returns:

the attribute as a string

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Description copied from class: Attribute

Writes the contents of this object to a data stream.

Specified by:

writeExternal in interface java.io.Externalizable

Overrides:

writeExternal in class Attribute

Throws:

java.io.IOException - if there's an error writing the data

writeExternal

public void writeExternal(java.io.DataOutput out)
                   throws java.io.IOException

Writes the contents of this object to a serialization stream.

Overrides:

writeExternal in class Attribute

Throws:

java.io.IOException - if there's an error writing the data

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Specified by:

readExternal in interface java.io.Externalizable

Overrides:

readExternal in class Attribute

java.io.IOException

java.lang.ClassNotFoundException

readExternal

public void readExternal(java.io.DataInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Reads the contents of this object from a serialization stream.

Overrides:

readExternal in class Attribute

Throws:

java.io.IOException - if there's an error reading in the data

java.lang.ClassNotFoundException - if a class name is unrecognized