/*
* Copyright (c) 2011,2013 Big Switch Networks, Inc.
*
* Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/legal/epl-v10.html
*
* 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.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Originally created by David Erickson, Stanford University
*
* 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.sdnplatform.packet;
import java.nio.ByteBuffer;
import java.util.Arrays;
/**
*
*
* @author David Erickson (daviderickson@cs.stanford.edu)
*/
public class LLDPTLV {
protected byte type;
protected short length;
protected byte[] value;
/**
* @return the type
*/
public byte getType() {
return type;
}
/**
* @param type the type to set
*/
public LLDPTLV setType(byte type) {
this.type = type;
return this;
}
/**
* @return the length
*/
public short getLength() {
return length;
}
/**
* @param length the length to set
*/
public LLDPTLV setLength(short length) {
this.length = length;
return this;
}
/**
* @return the value
*/
public byte[] getValue() {
return value;
}
/**
* @param value the value to set
*/
public LLDPTLV setValue(byte[] value) {
this.value = value;
return this;
}
public byte[] serialize() {
// type = 7 bits
// info string length 9 bits, each value == byte
// info string
short scratch = (short) (((0x7f & this.type) << 9) | (0x1ff & this.length));
byte[] data = new byte[2+this.length];
ByteBuffer bb = ByteBuffer.wrap(data);
bb.putShort(scratch);
if (this.value != null)
bb.put(this.value);
return data;
}
public LLDPTLV deserialize(ByteBuffer bb) {
short sscratch;
sscratch = bb.getShort();
this.type = (byte) ((sscratch >> 9) & 0x7f);
this.length = (short) (sscratch & 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)
return null;
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 + length;
result = prime * result + type;
result = prime * result + Arrays.hashCode(value);
return result;
}
/* (non-Javadoc)
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (!(obj instanceof LLDPTLV))
return false;
LLDPTLV other = (LLDPTLV) obj;
if (length != other.length)
return false;
if (type != other.type)
return false;
if (!Arrays.equals(value, other.value))
return false;
return true;
}
@Override
public String toString() {
String str = "type=" + Integer.toString(this.type, 16).toUpperCase()
+ " length=" + this.length
+ " value=";
for (byte b : this.value)
str+= Integer.toString(b, 16).toUpperCase();
return str;
}
}