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/*
* Copyright 2015 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.onosproject.bgpio.types;
import java.util.Objects;
import org.jboss.netty.buffer.ChannelBuffer;
import com.google.common.base.MoreObjects;
/**
* Provides Autonomous System Tlv which contains opaque value (32 Bit AS Number).
*/
public class AutonomousSystemTlv implements BgpValueType {
/* Reference :draft-ietf-idr-ls-distribution-11
* 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type= 512 | Length=4 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| opaque value (32 Bit AS Number) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
public static final short TYPE = 512;
public static final short LENGTH = 4;
private final int asNum;
/**
* Constructor to initialize asNum.
*
* @param asNum 32 Bit AS Number
*/
public AutonomousSystemTlv(int asNum) {
this.asNum = asNum;
}
/**
* Returns object of this class with specified asNum.
*
* @param asNum 32 Bit AS Number
* @return object of AutonomousSystemTlv
*/
public static AutonomousSystemTlv of(final int asNum) {
return new AutonomousSystemTlv(asNum);
}
/**
* Returns opaque value of AS Number.
*
* @return opaque value of AS Number
*/
public int getAsNum() {
return asNum;
}
@Override
public int hashCode() {
return Objects.hash(asNum);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof AutonomousSystemTlv) {
AutonomousSystemTlv other = (AutonomousSystemTlv) obj;
return Objects.equals(asNum, other.asNum);
}
return false;
}
@Override
public int write(ChannelBuffer c) {
int iLenStartIndex = c.writerIndex();
c.writeShort(TYPE);
c.writeShort(LENGTH);
c.writeInt(asNum);
return c.writerIndex() - iLenStartIndex;
}
/**
* Reads the channel buffer and returns object of AutonomousSystemTlv.
*
* @param c ChannelBuffer
* @return object of AutonomousSystemTlv
*/
public static AutonomousSystemTlv read(ChannelBuffer c) {
return AutonomousSystemTlv.of(c.readInt());
}
@Override
public short getType() {
return TYPE;
}
@Override
public int compareTo(Object o) {
if (this.equals(o)) {
return 0;
}
return ((Integer) (this.asNum)).compareTo((Integer) (((AutonomousSystemTlv) o).asNum));
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("Type", TYPE)
.add("Length", LENGTH)
.add("asNum", asNum)
.toString();
}
}
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