| /* |
| * Copyright 2014-present Open Networking Foundation |
| * |
| * 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 { |
| |
| public static final int MAX_LENGTH = 0x1ff; |
| |
| protected byte type; |
| protected short length; |
| protected byte[] value; |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("["); |
| sb.append("type= "); |
| sb.append(type); |
| sb.append("length= "); |
| sb.append(length); |
| sb.append("value= "); |
| sb.append(Arrays.toString(value)); |
| sb.append("]"); |
| return sb.toString(); |
| } |
| |
| /** |
| * @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; |
| } |
| } |