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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.protocol.ver1;
import org.jboss.netty.buffer.ChannelBuffer;
import org.onosproject.pcepio.exceptions.PcepParseException;
import org.onosproject.pcepio.protocol.PcepFecObjectIPv6;
import org.onosproject.pcepio.protocol.PcepVersion;
import org.onosproject.pcepio.types.PcepObjectHeader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.MoreObjects;
/**
* Provides Pcep Fec Object IPv6 object.
*/
public class PcepFecObjectIPv6Ver1 implements PcepFecObjectIPv6 {
/*
* ref : draft-zhao-pce-pcep-extension-for-pce-controller-01 , section : 7.5
*
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// IPv6 Node ID (16 bytes) //
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
FEC Object-Type is 2 IPv6 Node ID
*/
protected static final Logger log = LoggerFactory.getLogger(PcepFecObjectIPv6Ver1.class);
public static final byte FEC_OBJ_TYPE = 2;
public static final byte FEC_OBJ_CLASS = 63; //to be defined
public static final byte FEC_OBJECT_VERSION = 1;
public static final short FEC_OBJ_MINIMUM_LENGTH = 20;
public static final int MINIMUM_COMMON_HEADER_LENGTH = 4;
public static final int IPV6_ADDRESS_LENGTH = 16;
static final PcepObjectHeader DEFAULT_FEC_OBJECT_HEADER = new PcepObjectHeader(FEC_OBJ_CLASS, FEC_OBJ_TYPE,
PcepObjectHeader.REQ_OBJ_OPTIONAL_PROCESS, PcepObjectHeader.RSP_OBJ_PROCESSED, FEC_OBJ_MINIMUM_LENGTH);
private PcepObjectHeader fecObjHeader;
private byte[] nodeID = new byte[IPV6_ADDRESS_LENGTH];
/**
* Constructor to initialize parameters for PCEP fec object.
*
* @param fecObjHeader Fec object header
* @param nodeID node ID
*/
public PcepFecObjectIPv6Ver1(PcepObjectHeader fecObjHeader, byte[] nodeID) {
this.fecObjHeader = fecObjHeader;
this.nodeID = nodeID;
}
/**
* Sets the Object header.
*
* @param obj object header
*/
public void setFecIpv6ObjHeader(PcepObjectHeader obj) {
this.fecObjHeader = obj;
}
@Override
public void setNodeID(byte[] nodeID) {
this.nodeID = nodeID;
}
/**
* Returns object header.
*
* @return fec Object Header
*/
public PcepObjectHeader getFecIpv6ObjHeader() {
return this.fecObjHeader;
}
@Override
public byte[] getNodeID() {
return this.nodeID;
}
/**
* reads the channel buffer and returns object of PcepFecObjectIPv6.
*
* @param cb of channel buffer.
* @return object of PcepFecObjectIPv6
* @throws PcepParseException when fails to read from channel buffer
*/
public static PcepFecObjectIPv6 read(ChannelBuffer cb) throws PcepParseException {
PcepObjectHeader fecObjHeader;
byte[] nodeID = new byte[IPV6_ADDRESS_LENGTH];
fecObjHeader = PcepObjectHeader.read(cb);
cb.readBytes(nodeID, 0, IPV6_ADDRESS_LENGTH);
return new PcepFecObjectIPv6Ver1(fecObjHeader, nodeID);
}
@Override
public int write(ChannelBuffer cb) throws PcepParseException {
int objStartIndex = cb.writerIndex();
//write common header
int objLenIndex = fecObjHeader.write(cb);
cb.writeBytes(nodeID);
//now write FEC IPv4 Object Length
cb.setShort(objLenIndex, (short) (cb.writerIndex() - objStartIndex));
return cb.writerIndex();
}
/**
* Builder class for PCEP fec object IPv6.
*/
public static class Builder implements PcepFecObjectIPv6.Builder {
private boolean bIsHeaderSet = false;
private boolean bIsNodeIdset = false;
private PcepObjectHeader fecObjHeader;
private byte[] nodeID = new byte[IPV6_ADDRESS_LENGTH];
private boolean bIsPFlagSet = false;
private boolean bPFlag;
private boolean bIsIFlagSet = false;
private boolean bIFlag;
@Override
public PcepFecObjectIPv6 build() throws PcepParseException {
PcepObjectHeader fecObjHeader = this.bIsHeaderSet ? this.fecObjHeader : DEFAULT_FEC_OBJECT_HEADER;
if (!this.bIsNodeIdset) {
throw new PcepParseException(" NodeID not set while building PcepFecObjectIPv6 object.");
}
if (bIsPFlagSet) {
fecObjHeader.setPFlag(bPFlag);
}
if (bIsIFlagSet) {
fecObjHeader.setIFlag(bIFlag);
}
return new PcepFecObjectIPv6Ver1(fecObjHeader, this.nodeID);
}
@Override
public Builder setPFlag(boolean value) {
this.bPFlag = value;
this.bIsPFlagSet = true;
return this;
}
@Override
public Builder setIFlag(boolean value) {
this.bIFlag = value;
this.bIsIFlagSet = true;
return this;
}
@Override
public PcepObjectHeader getFecIpv6ObjHeader() {
return this.fecObjHeader;
}
@Override
public Builder setFecIpv6ObjHeader(PcepObjectHeader obj) {
this.fecObjHeader = obj;
this.bIsHeaderSet = true;
return this;
}
@Override
public byte[] getNodeID() {
return this.nodeID;
}
@Override
public Builder setNodeID(byte[] value) {
this.nodeID = value;
this.bIsNodeIdset = true;
return this;
}
}
@Override
public PcepVersion getVersion() {
return PcepVersion.PCEP_1;
}
@Override
public int getType() {
return FEC_OBJ_TYPE;
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("fecObjHeader", fecObjHeader)
.add("NodeID: ", nodeID)
.toString();
}
}
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