LLC.java
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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 static com.google.common.base.MoreObjects.toStringHelper;
import static org.onlab.packet.PacketUtils.*;
/**
* This class represents an Link Local Control header that is used in Ethernet
* 802.3.
*/
public class LLC extends BasePacket {
public static final byte LLC_HEADER_LENGTH = 3;
private byte dsap = 0;
private byte ssap = 0;
private byte ctrl = 0;
public byte getDsap() {
return this.dsap;
}
public void setDsap(final byte dsap) {
this.dsap = dsap;
}
public byte getSsap() {
return this.ssap;
}
public void setSsap(final byte ssap) {
this.ssap = ssap;
}
public byte getCtrl() {
return this.ctrl;
}
public void setCtrl(final byte ctrl) {
this.ctrl = ctrl;
}
@Override
public byte[] serialize() {
final byte[] data = new byte[3];
final ByteBuffer bb = ByteBuffer.wrap(data);
bb.put(this.dsap);
bb.put(this.ssap);
bb.put(this.ctrl);
return data;
}
@Override
public IPacket deserialize(final byte[] data, final int offset,
final int length) {
final ByteBuffer bb = ByteBuffer.wrap(data, offset, length);
this.dsap = bb.get();
this.ssap = bb.get();
this.ctrl = bb.get();
return this;
}
/**
* Deserializer function for LLC packets.
*
* @return deserializer function
*/
public static Deserializer<LLC> deserializer() {
return (data, offset, length) -> {
checkInput(data, offset, length, LLC_HEADER_LENGTH);
ByteBuffer bb = ByteBuffer.wrap(data, offset, length);
LLC llc = new LLC();
llc.dsap = bb.get();
llc.ssap = bb.get();
llc.ctrl = bb.get();
return llc;
};
}
@Override
public String toString() {
return toStringHelper(getClass())
.add("dsap", Byte.toString(dsap))
.add("ssap", Byte.toString(ssap))
.add("ctrl", Byte.toString(ctrl))
.toString();
}
}