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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 org.onosproject.bgpio.exceptions.BgpParseException;
import com.google.common.base.MoreObjects;
/**
* Provides OSPF Route Type Tlv which contains route type.
*/
public class OSPFRouteTypeTlv 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 | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Route Type |
+-+-+-+-+-+-+-+-+
Figure : OSPF Route Type TLV Format
*/
public static final short TYPE = 264;
public static final short LENGTH = 1;
public static final int INTRA_AREA_TYPE = 1;
public static final short INTER_AREA_TYPE = 2;
public static final short EXTERNAL_TYPE_1 = 3;
public static final short EXTERNAL_TYPE_2 = 4;
public static final short NSSA_TYPE_1 = 5;
public static final short NSSA_TYPE_2 = 6;
private final byte routeType;
/**
* Enum for Route Type.
*/
public enum RouteType {
Intra_Area(1), Inter_Area(2), External_1(3), External_2(4), NSSA_1(5), NSSA_2(6);
int value;
RouteType(int val) {
value = val;
}
public byte getType() {
return (byte) value;
}
}
/**
* Constructor to initialize routeType.
*
* @param routeType Route type
*/
public OSPFRouteTypeTlv(byte routeType) {
this.routeType = routeType;
}
/**
* Returns object of this class with specified routeType.
*
* @param routeType Route type
* @return object of OSPFRouteTypeTlv
*/
public static OSPFRouteTypeTlv of(final byte routeType) {
return new OSPFRouteTypeTlv(routeType);
}
/**
* Returns RouteType.
*
* @return RouteType
* @throws BgpParseException if routeType is not matched
*/
public RouteType getValue() throws BgpParseException {
switch (routeType) {
case INTRA_AREA_TYPE:
return RouteType.Intra_Area;
case INTER_AREA_TYPE:
return RouteType.Inter_Area;
case EXTERNAL_TYPE_1:
return RouteType.External_1;
case EXTERNAL_TYPE_2:
return RouteType.External_2;
case NSSA_TYPE_1:
return RouteType.NSSA_1;
case NSSA_TYPE_2:
return RouteType.NSSA_2;
default:
throw new BgpParseException(BgpErrorType.UPDATE_MESSAGE_ERROR, (byte) 0, null);
}
}
@Override
public int hashCode() {
return Objects.hash(routeType);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof OSPFRouteTypeTlv) {
OSPFRouteTypeTlv other = (OSPFRouteTypeTlv) obj;
return Objects.equals(routeType, other.routeType);
}
return false;
}
@Override
public int write(ChannelBuffer c) {
int iLenStartIndex = c.writerIndex();
c.writeShort(TYPE);
c.writeShort(LENGTH);
c.writeByte(routeType);
return c.writerIndex() - iLenStartIndex;
}
/**
* Reads from ChannelBuffer and parses OSPFRouteTypeTlv.
*
* @param cb channelBuffer
* @return object of OSPFRouteTypeTlv
*/
public static OSPFRouteTypeTlv read(ChannelBuffer cb) {
return OSPFRouteTypeTlv.of(cb.readByte());
}
@Override
public short getType() {
return TYPE;
}
@Override
public int compareTo(Object o) {
if (this.equals(o)) {
return 0;
}
return ((Byte) (this.routeType)).compareTo((Byte) (((OSPFRouteTypeTlv) o).routeType));
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("Type", TYPE)
.add("Length", LENGTH)
.add("Value", routeType)
.toString();
}
}
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