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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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.MoreObjects;
/**
* Provides MultiProtocolExtnCapabilityTlv.
*/
public class MultiProtocolExtnCapabilityTlv implements BGPValueType {
/*
0 7 15 23 31
+-------+-------+-------+-------+
| AFI | Res | SAFI |
+-------+-------+-------+-------+
Multiprotocol Extensions CAPABILITY TLV format
REFERENCE : RFC 4760
*/
protected static final Logger log = LoggerFactory
.getLogger(MultiProtocolExtnCapabilityTlv.class);
public static final byte TYPE = 1;
public static final byte LENGTH = 4;
private final short afi;
private final byte res;
private final byte safi;
/**
* Constructor to initialize variables.
* @param afi Address Family Identifiers
* @param res reserved field
* @param safi Subsequent Address Family Identifier
*/
public MultiProtocolExtnCapabilityTlv(short afi, byte res, byte safi) {
this.afi = afi;
this.res = res;
this.safi = safi;
}
/**
* Returns object of MultiProtocolExtnCapabilityTlv.
* @param afi Address Family Identifiers
* @param res reserved field
* @param safi Subsequent Address Family Identifier
* @return object of MultiProtocolExtnCapabilityTlv
*/
public static MultiProtocolExtnCapabilityTlv of(short afi, byte res,
byte safi) {
return new MultiProtocolExtnCapabilityTlv(afi, res, safi);
}
/**
* Returns afi Address Family Identifiers value.
* @return afi Address Family Identifiers value
*/
public short getAFI() {
return afi;
}
/**
* Returns res reserved field value.
* @return res reserved field value
*/
public byte getRes() {
return res;
}
/**
* Returns safi Subsequent Address Family Identifier value.
* @return safi Subsequent Address Family Identifier value
*/
public byte getSAFI() {
return safi;
}
@Override
public short getType() {
return TYPE;
}
@Override
public int hashCode() {
return Objects.hash(afi, res, safi);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof MultiProtocolExtnCapabilityTlv) {
MultiProtocolExtnCapabilityTlv other = (MultiProtocolExtnCapabilityTlv) obj;
return Objects.equals(this.afi, other.afi)
&& Objects.equals(this.res, other.res)
&& Objects.equals(this.safi, other.safi);
}
return false;
}
@Override
public int write(ChannelBuffer cb) {
int iLenStartIndex = cb.writerIndex();
cb.writeByte(TYPE);
cb.writeByte(LENGTH);
// write afi
cb.writeShort(afi);
// write res
cb.writeByte(res);
// write safi
cb.writeByte(safi);
return cb.writerIndex() - iLenStartIndex;
}
/**
* Reads from channel buffer and returns object of MultiprotocolCapabilityTlv.
* @param cb of type channel buffer
* @return object of MultiProtocolExtnCapabilityTlv
*/
public static BGPValueType read(ChannelBuffer cb) {
short afi = cb.readShort();
byte res = cb.readByte();
byte safi = cb.readByte();
return new MultiProtocolExtnCapabilityTlv(afi, res, safi);
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("Type", TYPE)
.add("Length", LENGTH)
.add("AFI", afi)
.add("Reserved", res)
.add("SAFI", safi).toString();
}
}
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