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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.PcepBandwidthObject;
import org.onosproject.pcepio.types.PcepObjectHeader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.MoreObjects;
/**
* Provides PcepBandwidthObject.
*/
public class PcepBandwidthObjectVer1 implements PcepBandwidthObject {
/*
* RFC : 5440 , section : 7.7.
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 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
The BANDWIDTH Object format
*/
protected static final Logger log = LoggerFactory.getLogger(PcepBandwidthObjectVer1.class);
/*
* Requested bandwidth: BANDWIDTH Object-Type is 1.
Bandwidth of an existing TE LSP for which a re-optimization is
requested. BANDWIDTH Object-Type is 2.
*/
//Right now handling type 1
public static final byte BANDWIDTH_OBJ_TYPE = 1;
public static final byte BANDWIDTH_OBJ_CLASS = 5;
public static final byte BANDWIDTH_OBJECT_VERSION = 1;
public static final short BANDWIDTH_OBJ_MINIMUM_LENGTH = 8;
static final PcepObjectHeader DEFAULT_BANDWIDTH_OBJECT_HEADER = new PcepObjectHeader(BANDWIDTH_OBJ_CLASS,
BANDWIDTH_OBJ_TYPE, PcepObjectHeader.REQ_OBJ_OPTIONAL_PROCESS, PcepObjectHeader.RSP_OBJ_PROCESSED,
BANDWIDTH_OBJ_MINIMUM_LENGTH);
private PcepObjectHeader bandwidthObjHeader;
private int iBandwidth;
/**
* Constructor to bandwidth object header and bandwidth.
*
* @param bandwidthObjHeader bandwidth object header
* @param iBandwidth bandwidth value
*/
public PcepBandwidthObjectVer1(PcepObjectHeader bandwidthObjHeader, int iBandwidth) {
this.bandwidthObjHeader = bandwidthObjHeader;
this.iBandwidth = iBandwidth;
}
/**
* Constructor to initialize bandwidth.
*
* @param iBandwidth bandwidth value
*/
public PcepBandwidthObjectVer1(int iBandwidth) {
this.bandwidthObjHeader = DEFAULT_BANDWIDTH_OBJECT_HEADER;
this.iBandwidth = iBandwidth;
}
/**
* Returns Object Header.
*
* @return bandwidthObjHeader
*/
public PcepObjectHeader getBandwidthObjHeader() {
return this.bandwidthObjHeader;
}
/**
* Sets Object Header.
*
* @param obj bandwidth object header
*/
public void setBandwidthObjHeader(PcepObjectHeader obj) {
this.bandwidthObjHeader = obj;
}
@Override
public int getBandwidth() {
return this.iBandwidth;
}
@Override
public void setBandwidth(int iBandwidth) {
this.iBandwidth = iBandwidth;
}
/**
* Reads from channel buffer and returns object of PcepBandwidthObject.
*
* @param cb channel buffer to parse
* @return object of PcepBandwidthObject
* @throws PcepParseException while parsing channel buffer
*/
public static PcepBandwidthObject read(ChannelBuffer cb) throws PcepParseException {
PcepObjectHeader bandwidthObjHeader;
int iBandwidth;
bandwidthObjHeader = PcepObjectHeader.read(cb);
iBandwidth = cb.readInt();
return new PcepBandwidthObjectVer1(bandwidthObjHeader, iBandwidth);
}
@Override
public int write(ChannelBuffer cb) throws PcepParseException {
//write Object header
int objStartIndex = cb.writerIndex();
int objLenIndex = bandwidthObjHeader.write(cb);
if (objLenIndex <= 0) {
throw new PcepParseException("Failed to write bandwidth object header. Index " + objLenIndex);
}
cb.writeInt(iBandwidth);
short hLength = (short) (cb.writerIndex() - objStartIndex);
cb.setShort(objLenIndex, hLength);
//will be helpful during print().
bandwidthObjHeader.setObjLen(hLength);
return cb.writerIndex() - objStartIndex;
}
/**
* builder class for PCEP bandwidth object.
*/
public static class Builder implements PcepBandwidthObject.Builder {
private PcepObjectHeader bandwidthObjHeader;
private boolean bIsHeaderSet = false;
private int iBandwidth;
private boolean bIsBandwidthSet = false;
private boolean bPFlag;
private boolean bIsPFlagSet = false;
private boolean bIFlag;
private boolean bIsIFlagSet = false;
@Override
public PcepBandwidthObject build() throws PcepParseException {
PcepObjectHeader bandwidthObjHeader = this.bIsHeaderSet ? this.bandwidthObjHeader
: DEFAULT_BANDWIDTH_OBJECT_HEADER;
if (bIsPFlagSet) {
bandwidthObjHeader.setPFlag(bPFlag);
}
if (bIsIFlagSet) {
bandwidthObjHeader.setIFlag(bIFlag);
}
if (!this.bIsBandwidthSet) {
throw new PcepParseException("bandwidth not Set while building Bandwidth Object.");
}
return new PcepBandwidthObjectVer1(bandwidthObjHeader, iBandwidth);
}
@Override
public int getBandwidth() {
return this.iBandwidth;
}
@Override
public PcepObjectHeader getBandwidthObjHeader() {
return this.bandwidthObjHeader;
}
@Override
public Builder setBandwidthObjHeader(PcepObjectHeader obj) {
this.bandwidthObjHeader = obj;
return this;
}
@Override
public Builder setBandwidth(int iBandwidth) {
this.iBandwidth = iBandwidth;
this.bIsBandwidthSet = true;
return this;
}
@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 String toString() {
return MoreObjects.toStringHelper(getClass())
.add("BandwidthObjectHeader", bandwidthObjHeader)
.add("Bandwidth", iBandwidth).toString();
}
}
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