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/*
* Copyright 2015 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onosproject.pcepio.types;
import java.util.Objects;
import org.jboss.netty.buffer.ChannelBuffer;
import org.onosproject.pcepio.protocol.PcepVersion;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.MoreObjects;
/**
* Path Key SubObject: When a PCC needs to expand a path-key in order to expand a CPS, it
* issues a Path Computation Request (PCReq) to the PCE identified in
* the PKS in the RSVP-TE ERO that it is processing. The PCC supplies
* the PKS to be expanded in a PATH-KEY SubObject in the PCReq message.
*/
public class PathKeySubObject implements PcepValueType {
/*
Pathkey subobject(RFC 5520):
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|L| Type | Length | Path-Key |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PCE ID (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
protected static final Logger log = LoggerFactory.getLogger(PathKeySubObject.class);
public static final byte TYPE = 0x40;
public static final byte LENGTH = 8;
private final short pathKey;
private final int pceID;
/**
* Constructor for Path Key sub Object which initializes pathKey and pceId.
*
* @param pathKey path key provided by PCC
* @param pceID ID for the PCE
*/
public PathKeySubObject(short pathKey, int pceID) {
this.pathKey = pathKey;
this.pceID = pceID;
}
/**
* Creates Path Key sub Object which initializes pathKey and pceId.
*
* @param pathKey path key provided by PCC
* @param pceID PCE id
* @return new object of type path key sub object
*/
public static PathKeySubObject of(short pathKey, int pceID) {
return new PathKeySubObject(pathKey, pceID);
}
/**
* Returns Path Key.
*
* @return pathKey
*/
public short getPathKey() {
return pathKey;
}
/**
* Returns pceID.
*
* @return pceID
*/
public int getPceId() {
return pceID;
}
@Override
public PcepVersion getVersion() {
return PcepVersion.PCEP_1;
}
@Override
public short getType() {
return TYPE;
}
@Override
public short getLength() {
return LENGTH;
}
@Override
public int hashCode() {
return Objects.hash(pathKey, pceID);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof PathKeySubObject) {
PathKeySubObject other = (PathKeySubObject) obj;
return Objects.equals(this.pathKey, other.pathKey) && Objects.equals(this.pceID, other.pceID);
}
return false;
}
@Override
public int write(ChannelBuffer c) {
int iLenStartIndex = c.writerIndex();
c.writeShort(TYPE);
c.writeShort(LENGTH);
c.writeShort(pathKey);
c.writeInt(pceID);
return c.writerIndex() - iLenStartIndex;
}
/**
* Reads the channel buffer and returns new path key sub objects.
*
* @param c of type channel buffer
* @return object of type path key sub object
*/
public static PcepValueType read(ChannelBuffer c) {
Short pathKey = c.readShort();
int pceID = c.readInt();
return new PathKeySubObject(pathKey, pceID);
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("Type", TYPE)
.add("Length", LENGTH)
.add("PathKey", pathKey)
.add("PceID", pceID)
.toString();
}
}
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