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/*
* Copyright 2014 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.onlab.packet;
import java.nio.ByteBuffer;
import java.util.Arrays;
/**
*
*
*/
public class LLDPTLV {
protected byte type;
protected short length;
protected byte[] value;
/**
* @return the type
*/
public byte getType() {
return this.type;
}
/**
* @param type
* the type to set
* @return this
*/
public LLDPTLV setType(final byte type) {
this.type = type;
return this;
}
/**
* @return the length
*/
public short getLength() {
return this.length;
}
/**
* @param length
* the length to set
* @return this
*/
public LLDPTLV setLength(final short length) {
this.length = length;
return this;
}
/**
* @return the value
*/
public byte[] getValue() {
return this.value;
}
/**
* @param value
* the value to set
* @return this
*/
public LLDPTLV setValue(final byte[] value) {
this.value = value;
return this;
}
public byte[] serialize() {
// type = 7 bits
// info string length 9 bits, each value == byte
// info string
final short scratch = (short) ((0x7f & this.type) << 9 | 0x1ff & this.length);
final byte[] data = new byte[2 + this.length];
final ByteBuffer bb = ByteBuffer.wrap(data);
bb.putShort(scratch);
if (this.value != null) {
bb.put(this.value);
}
return data;
}
public LLDPTLV deserialize(final ByteBuffer bb) throws DeserializationException {
if (bb.remaining() < 2) {
throw new DeserializationException(
"Not enough bytes to deserialize TLV type and length");
}
short typeLength;
typeLength = bb.getShort();
this.type = (byte) (typeLength >> 9 & 0x7f);
this.length = (short) (typeLength & 0x1ff);
if (this.length > 0) {
this.value = new byte[this.length];
// if there is an underrun just toss the TLV
if (bb.remaining() < this.length) {
throw new DeserializationException(
"Remaining bytes are less then the length of the TLV");
}
bb.get(this.value);
}
return this;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
final int prime = 1423;
int result = 1;
result = prime * result + this.length;
result = prime * result + this.type;
result = prime * result + Arrays.hashCode(this.value);
return result;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof LLDPTLV)) {
return false;
}
final LLDPTLV other = (LLDPTLV) obj;
if (this.length != other.length) {
return false;
}
if (this.type != other.type) {
return false;
}
if (!Arrays.equals(this.value, other.value)) {
return false;
}
return true;
}
}
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