| /* |
| * Copyright 2017-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.dhcp; |
| |
| import org.onlab.packet.BasePacket; |
| import org.onlab.packet.Deserializer; |
| import org.slf4j.Logger; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| import java.util.Objects; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Default DHCP option. |
| */ |
| public class DhcpOption extends BasePacket { |
| public static final int OPT_CODE_LEN = 1; |
| public static final int DEFAULT_LEN = 2; |
| protected static final int UNSIGNED_BYTE_MASK = 0xff; |
| private final Logger log = getLogger(getClass()); |
| protected byte code; |
| protected byte length; |
| protected byte[] data; |
| |
| @Override |
| public byte[] serialize() { |
| ByteBuffer byteBuffer; |
| if (data != null) { |
| byteBuffer = ByteBuffer.allocate(DEFAULT_LEN + data.length); |
| byteBuffer.put(code); |
| byteBuffer.put(length); |
| byteBuffer.put(data); |
| } else { |
| byteBuffer = ByteBuffer.allocate(OPT_CODE_LEN); |
| byteBuffer.put(code); |
| } |
| return byteBuffer.array(); |
| } |
| |
| |
| /** |
| * Deserializer function for DHCP option. |
| * |
| * @return deserializer function |
| */ |
| public static Deserializer<DhcpOption> deserializer() { |
| return (data, offset, length) -> { |
| DhcpOption dhcpOption = new DhcpOption(); |
| ByteBuffer byteBuffer = ByteBuffer.wrap(data, offset, length); |
| dhcpOption.code = byteBuffer.get(); |
| if (byteBuffer.hasRemaining()) { |
| dhcpOption.length = byteBuffer.get(); |
| int optionLen = UNSIGNED_BYTE_MASK & dhcpOption.length; |
| dhcpOption.data = new byte[optionLen]; |
| byteBuffer.get(dhcpOption.data); |
| } else { |
| dhcpOption.length = 0; |
| dhcpOption.data = null; |
| } |
| return dhcpOption; |
| }; |
| } |
| |
| /** |
| * @return the code |
| */ |
| public byte getCode() { |
| return this.code; |
| } |
| |
| /** |
| * @param code the code to set |
| * @return this |
| */ |
| public DhcpOption setCode(final byte code) { |
| this.code = code; |
| return this; |
| } |
| |
| /** |
| * @return the length |
| */ |
| public byte getLength() { |
| return this.length; |
| } |
| |
| /** |
| * @param length the length to set |
| * @return this |
| */ |
| public DhcpOption setLength(final byte length) { |
| this.length = length; |
| return this; |
| } |
| |
| /** |
| * @return the data |
| */ |
| public byte[] getData() { |
| return this.data; |
| } |
| |
| /** |
| * @param data the data to set |
| * @return this |
| */ |
| public DhcpOption setData(final byte[] data) { |
| this.data = data; |
| return this; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#hashCode() |
| */ |
| @Override |
| public int hashCode() { |
| return Objects.hash(code, length, Arrays.hashCode(data)); |
| } |
| |
| /* |
| * (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 DhcpOption)) { |
| return false; |
| } |
| final DhcpOption other = (DhcpOption) obj; |
| return Objects.equals(this.code, other.code) && |
| Objects.equals(this.length, other.length) && |
| Arrays.equals(this.data, other.data); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#toString() |
| */ |
| @Override |
| public String toString() { |
| return "DhcpOption [code=" + this.code + ", length=" + this.length |
| + ", data=" + Arrays.toString(this.data) + "]"; |
| } |
| } |