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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.PcepEndPointsObject;
import org.onosproject.pcepio.types.PcepObjectHeader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.MoreObjects;
/**
* Provides PCEP Endpoints Object.
*/
public class PcepEndPointsObjectVer1 implements PcepEndPointsObject {
/*
* RFC : 5440 , section : 7.6
* An End point is defined as follows:
END-POINTS Object-Class is 4.
END-POINTS Object-Type is 1 for IPv4 and 2 for IPv6.
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Object-Class | OT |Res|P|I| Object Length (bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Source IPv4 address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Destination IPv4 address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
protected static final Logger log = LoggerFactory.getLogger(PcepEndPointsObjectVer1.class);
static final byte END_POINTS_OBJ_TYPE = 1;
static final byte END_POINTS_OBJ_CLASS = 4;
static final byte END_POINTS_OBJECT_VERSION = 1;
static final short END_POINTS_OBJ_MINIMUM_LENGTH = 12;
public static byte endPointObjType;
static final PcepObjectHeader DEFAULT_END_POINTS_OBJECT_HEADER = new PcepObjectHeader(END_POINTS_OBJ_CLASS,
END_POINTS_OBJ_TYPE, PcepObjectHeader.REQ_OBJ_OPTIONAL_PROCESS, PcepObjectHeader.RSP_OBJ_PROCESSED,
END_POINTS_OBJ_MINIMUM_LENGTH);
private PcepObjectHeader endPointsObjHeader;
public int sourceIpAddress;
public int destIpAddress;
/**
* Constructor to initialize all variables.
*
* @param endPointsObjHeader end points object header
* @param sourceIpAddress source IP address
* @param destIpAddress destination IP address
*/
public PcepEndPointsObjectVer1(PcepObjectHeader endPointsObjHeader, int sourceIpAddress, int destIpAddress) {
this.endPointsObjHeader = endPointsObjHeader;
this.sourceIpAddress = sourceIpAddress;
this.destIpAddress = destIpAddress;
}
/**
* Sets End Points Object Header.
*
* @param obj of PcepObjectHeader
*/
public void setEndPointsObjHeader(PcepObjectHeader obj) {
this.endPointsObjHeader = obj;
}
@Override
public void setSourceIpAddress(int sourceIpAddress) {
this.sourceIpAddress = sourceIpAddress;
}
@Override
public void setDestIpAddress(int destIpAddress) {
this.destIpAddress = destIpAddress;
}
@Override
public int getSourceIpAddress() {
return this.sourceIpAddress;
}
@Override
public int getDestIpAddress() {
return this.destIpAddress;
}
/**
* Reads from channel buffer and returns object of PcepEndPointsObject.
*
* @param cb of channel buffer
* @return object of PcepEndPointsObject
* @throws PcepParseException while parsing channel buffer
*/
public static PcepEndPointsObject read(ChannelBuffer cb) throws PcepParseException {
PcepObjectHeader endPointsObjHeader;
int sourceIpAddress;
int destIpAddress;
endPointsObjHeader = PcepObjectHeader.read(cb);
if (endPointsObjHeader.getObjType() == END_POINTS_OBJ_TYPE
&& endPointsObjHeader.getObjClass() == END_POINTS_OBJ_CLASS) {
sourceIpAddress = cb.readInt();
destIpAddress = cb.readInt();
} else {
throw new PcepParseException("Expected PcepEndPointsObject.");
}
return new PcepEndPointsObjectVer1(endPointsObjHeader, sourceIpAddress, destIpAddress);
}
@Override
public int write(ChannelBuffer cb) throws PcepParseException {
int objStartIndex = cb.writerIndex();
//write common header
int objLenIndex = endPointsObjHeader.write(cb);
//write source IPv4 IP
cb.writeInt(sourceIpAddress);
//write destination IPv4 IP
cb.writeInt(destIpAddress);
int length = cb.writerIndex() - objStartIndex;
//now write EndPoints Object Length
cb.setShort(objLenIndex, (short) length);
//will be helpful during print().
endPointsObjHeader.setObjLen((short) length);
return cb.writerIndex();
}
/**
* Builder class for PCEP end points objects.
*/
public static class Builder implements PcepEndPointsObject.Builder {
private boolean bIsHeaderSet = false;
private boolean bIsSourceIpAddressset = false;
private boolean bIsDestIpAddressset = false;
private PcepObjectHeader endpointsObjHeader;
private int sourceIpAddress;
private int destIpAddress;
private boolean bIsPFlagSet = false;
private boolean bPFlag;
private boolean bIsIFlagSet = false;
private boolean bIFlag;
@Override
public PcepEndPointsObject build() throws PcepParseException {
PcepObjectHeader endpointsObjHeader = this.bIsHeaderSet ? this.endpointsObjHeader
: DEFAULT_END_POINTS_OBJECT_HEADER;
if (bIsPFlagSet) {
endpointsObjHeader.setPFlag(bPFlag);
}
if (bIsIFlagSet) {
endpointsObjHeader.setIFlag(bIFlag);
}
if (!this.bIsSourceIpAddressset) {
throw new PcepParseException("SourceIpAddress not set while building EndPoints object");
}
if (!this.bIsDestIpAddressset) {
throw new PcepParseException("DestIpAddress not set while building EndPoints object");
}
return new PcepEndPointsObjectVer1(endpointsObjHeader, this.sourceIpAddress, this.destIpAddress);
}
@Override
public PcepObjectHeader getEndPointsObjHeader() {
return this.endpointsObjHeader;
}
@Override
public Builder setEndPointsObjHeader(PcepObjectHeader obj) {
this.endpointsObjHeader = obj;
this.bIsHeaderSet = true;
return this;
}
@Override
public int getSourceIpAddress() {
return this.sourceIpAddress;
}
@Override
public Builder setSourceIpAddress(int sourceIpAddress) {
this.sourceIpAddress = sourceIpAddress;
this.bIsSourceIpAddressset = true;
return this;
}
@Override
public int getDestIpAddress() {
return this.destIpAddress;
}
@Override
public Builder setDestIpAddress(int destIpAddress) {
this.destIpAddress = destIpAddress;
this.bIsDestIpAddressset = 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("sourceIpAddress", sourceIpAddress)
.add("destIpAddress", destIpAddress).toString();
}
}
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