| /* |
| * Copyright 2018-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 com.google.common.collect.ImmutableMap; |
| import org.onlab.packet.lacp.Lacp; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| import static com.google.common.base.MoreObjects.toStringHelper; |
| import static org.onlab.packet.PacketUtils.checkInput; |
| |
| /** |
| * Implements ethernet slow protocols. |
| */ |
| public class Slow extends BasePacket { |
| public static final int HEADER_LENGTH = 1; |
| |
| public static final byte SUBTYPE_LACP = 0x1; |
| // Subtypes below has not been implemented yet |
| // public static final byte SUBTYPE_LAMP = 0x2; |
| // public static final byte SUBTYPE_OAM = 0x3; |
| // public static final byte SUBTYPE_OSSP = 0xa; |
| |
| public static final Map<Byte, Deserializer<? extends IPacket>> PROTOCOL_DESERIALIZER_MAP = |
| ImmutableMap.<Byte, Deserializer<? extends IPacket>>builder() |
| .put(Slow.SUBTYPE_LACP, Lacp.deserializer()) |
| .build(); |
| |
| private byte subtype; |
| |
| /** |
| * Gets subtype. |
| * |
| * @return subtype |
| */ |
| public byte getSubtype() { |
| return subtype; |
| } |
| |
| /** |
| * Sets subtype. |
| * |
| * @param subtype the subtype to set |
| * @return this |
| */ |
| public Slow setSubtype(byte subtype) { |
| this.subtype = subtype; |
| return this; |
| } |
| |
| /** |
| * Deserializer function for Slow packets. |
| * |
| * @return deserializer function |
| */ |
| public static Deserializer<Slow> deserializer() { |
| return (data, offset, length) -> { |
| checkInput(data, offset, length, HEADER_LENGTH); |
| |
| Slow slow = new Slow(); |
| ByteBuffer bb = ByteBuffer.wrap(data, offset, length); |
| slow.setSubtype(bb.get()); |
| |
| Deserializer<? extends IPacket> deserializer; |
| if (Slow.PROTOCOL_DESERIALIZER_MAP.containsKey(slow.subtype)) { |
| deserializer = Slow.PROTOCOL_DESERIALIZER_MAP.get(slow.subtype); |
| } else { |
| throw new DeserializationException("Unsupported slow protocol subtype " + Byte.toString(slow.subtype)); |
| } |
| |
| int remainingLength = bb.limit() - bb.position(); |
| slow.payload = deserializer.deserialize(data, bb.position(), remainingLength); |
| slow.payload.setParent(slow); |
| |
| return slow; |
| }; |
| } |
| |
| @Override |
| public byte[] serialize() { |
| int length = HEADER_LENGTH; |
| byte[] payloadData = null; |
| if (this.payload != null) { |
| this.payload.setParent(this); |
| payloadData = this.payload.serialize(); |
| length += payloadData.length; |
| } |
| |
| final byte[] data = new byte[length]; |
| |
| final ByteBuffer bb = ByteBuffer.wrap(data); |
| bb.put(this.subtype); |
| if (payloadData != null) { |
| bb.put(payloadData); |
| } |
| |
| return data; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(super.hashCode(), subtype); |
| } |
| |
| @Override |
| public boolean equals(final Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (!super.equals(obj)) { |
| return false; |
| } |
| if (!(obj instanceof Slow)) { |
| return false; |
| } |
| final Slow other = (Slow) obj; |
| |
| return this.subtype == other.subtype; |
| } |
| |
| @Override |
| public String toString() { |
| return toStringHelper(getClass()) |
| .add("subtype", Byte.toString(subtype)) |
| .toString(); |
| } |
| } |