/* | |
* 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.PcepInterLayerObject; | |
import org.onosproject.pcepio.types.PcepObjectHeader; | |
import org.slf4j.Logger; | |
import org.slf4j.LoggerFactory; | |
import com.google.common.base.MoreObjects; | |
/* | |
* 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 | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| Reserved |N|I| | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
*/ | |
public class PcepInterLayerObjectVer1 implements PcepInterLayerObject { | |
protected static final Logger log = LoggerFactory.getLogger(PcepInterLayerObjectVer1.class); | |
public static final byte INTER_LAYER_OBJ_TYPE = 1; | |
public static final byte INTER_LAYER_OBJ_CLASS = 18; | |
public static final byte INTER_LAYER_OBJECT_VERSION = 1; | |
public static final short INTER_LAYER_OBJ_MINIMUM_LENGTH = 8; | |
public static final boolean DEFAULT_IFLAG = false; | |
public static final boolean DEFAULT_NFLAG = false; | |
public static final int OBJECT_HEADER_LENGTH = 4; | |
public static final int NFLAG_SHIFT_VALUE = 0x02; | |
public static final int IFLAG_SHIFT_VALUE = 0x01; | |
public static final int FLAGS_SET_VALUE = 1; | |
static final PcepObjectHeader DEFAULT_INTER_LAYER_OBJECT_HEADER = new PcepObjectHeader(INTER_LAYER_OBJ_CLASS, | |
INTER_LAYER_OBJ_TYPE, PcepObjectHeader.REQ_OBJ_OPTIONAL_PROCESS, PcepObjectHeader.RSP_OBJ_PROCESSED, | |
INTER_LAYER_OBJ_MINIMUM_LENGTH); | |
private PcepObjectHeader interLayerObjHeader; | |
private boolean bNFlag; | |
private boolean bIFlag; | |
/** | |
* Constructor to initialize all parameters for Pcep Inter Layer Object. | |
* | |
* @param interLayerObjHeader inter layer object header | |
* @param bNFlag N flag | |
* @param bIFlag I flag | |
*/ | |
public PcepInterLayerObjectVer1(PcepObjectHeader interLayerObjHeader, boolean bNFlag, boolean bIFlag) { | |
this.interLayerObjHeader = interLayerObjHeader; | |
this.bNFlag = bNFlag; | |
this.bIFlag = bIFlag; | |
} | |
/** | |
* Sets Object Header. | |
* | |
* @param obj object header | |
*/ | |
public void setInterLayerObjHeader(PcepObjectHeader obj) { | |
this.interLayerObjHeader = obj; | |
} | |
@Override | |
public void setbNFlag(boolean bNFlag) { | |
this.bNFlag = bNFlag; | |
} | |
@Override | |
public void setbIFlag(boolean bIFlag) { | |
this.bIFlag = bIFlag; | |
} | |
/** | |
* Returns object header. | |
* | |
* @return inter Layer Object Header | |
*/ | |
public PcepObjectHeader getInterLayerObjHeader() { | |
return this.interLayerObjHeader; | |
} | |
@Override | |
public boolean getbNFlag() { | |
return this.bNFlag; | |
} | |
@Override | |
public boolean getbIFlag() { | |
return this.bIFlag; | |
} | |
/** | |
* Reads channel buffer and returns object of PcepInterLayerObject. | |
* | |
* @param cb of type channel buffer | |
* @return object of PcepInterLayerObject | |
* @throws PcepParseException when fails to read from channel buffer | |
*/ | |
public static PcepInterLayerObject read(ChannelBuffer cb) throws PcepParseException { | |
PcepObjectHeader interLayerObjHeader; | |
boolean bNFlag; | |
boolean bIFlag; | |
interLayerObjHeader = PcepObjectHeader.read(cb); | |
//take only InterLayerObject buffer. | |
ChannelBuffer tempCb = cb.readBytes(interLayerObjHeader.getObjLen() - OBJECT_HEADER_LENGTH); | |
int iTemp = tempCb.readInt(); | |
bIFlag = ((iTemp & (byte) IFLAG_SHIFT_VALUE) == FLAGS_SET_VALUE) ? true : false; | |
bNFlag = ((iTemp & (byte) NFLAG_SHIFT_VALUE) == FLAGS_SET_VALUE) ? true : false; | |
return new PcepInterLayerObjectVer1(interLayerObjHeader, bNFlag, bIFlag); | |
} | |
@Override | |
public int write(ChannelBuffer cb) throws PcepParseException { | |
//write Object header | |
int objStartIndex = cb.writerIndex(); | |
int objLenIndex = interLayerObjHeader.write(cb); | |
if (objLenIndex <= 0) { | |
throw new PcepParseException(" ObjectLength Index is " + objLenIndex); | |
} | |
int iTemp = 0; | |
if (bIFlag) { | |
iTemp = iTemp | (byte) IFLAG_SHIFT_VALUE; | |
} | |
if (bNFlag) { | |
iTemp = iTemp | (byte) NFLAG_SHIFT_VALUE; | |
} | |
cb.writeInt(iTemp); | |
//Update object length now | |
int length = cb.writerIndex() - objStartIndex; | |
//will be helpful during print(). | |
interLayerObjHeader.setObjLen((short) length); | |
cb.setShort(objLenIndex, (short) length); | |
objLenIndex = cb.writerIndex(); | |
return objLenIndex; | |
} | |
/** | |
* Builder class for PCEP inter layer object. | |
*/ | |
public static class Builder implements PcepInterLayerObject.Builder { | |
private boolean bIsHeaderSet = false; | |
private boolean bIsNFlagset = false; | |
private boolean bIsIFlagset = false; | |
private PcepObjectHeader interLayerObjHeader; | |
private boolean bNFlag; | |
private boolean bIFlag; | |
private boolean bIsPFlagSet = false; | |
private boolean bPFalg; | |
private boolean bIsIFlagSet = false; | |
private boolean iFlag; | |
@Override | |
public PcepInterLayerObject build() { | |
PcepObjectHeader interLayerObjHeader = this.bIsHeaderSet ? this.interLayerObjHeader | |
: DEFAULT_INTER_LAYER_OBJECT_HEADER; | |
boolean bNFlag = this.bIsNFlagset ? this.bNFlag : DEFAULT_NFLAG; | |
boolean bIFlag = this.bIsIFlagset ? this.bIFlag : DEFAULT_IFLAG; | |
if (bIsPFlagSet) { | |
interLayerObjHeader.setPFlag(bPFalg); | |
} | |
if (bIsIFlagSet) { | |
interLayerObjHeader.setIFlag(iFlag); | |
} | |
return new PcepInterLayerObjectVer1(interLayerObjHeader, bNFlag, bIFlag); | |
} | |
@Override | |
public PcepObjectHeader getInterLayerObjHeader() { | |
return this.interLayerObjHeader; | |
} | |
@Override | |
public Builder setInterLayerObjHeader(PcepObjectHeader obj) { | |
this.interLayerObjHeader = obj; | |
this.bIsHeaderSet = true; | |
return this; | |
} | |
@Override | |
public boolean getbNFlag() { | |
return this.bNFlag; | |
} | |
@Override | |
public Builder setbNFlag(boolean value) { | |
this.bNFlag = value; | |
this.bIsNFlagset = true; | |
return this; | |
} | |
@Override | |
public boolean getbIFlag() { | |
return this.bIFlag; | |
} | |
@Override | |
public Builder setbIFlag(boolean value) { | |
this.bIFlag = value; | |
this.bIsIFlagset = true; | |
return this; | |
} | |
@Override | |
public Builder setPFlag(boolean value) { | |
this.bPFalg = value; | |
this.bIsPFlagSet = true; | |
return this; | |
} | |
@Override | |
public Builder setIFlag(boolean value) { | |
this.iFlag = value; | |
this.bIsIFlagSet = true; | |
return this; | |
} | |
} | |
@Override | |
public String toString() { | |
return MoreObjects.toStringHelper(getClass()).add("IFlag", bIFlag).add("NFlag", bNFlag).toString(); | |
} | |
} |