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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.attr;
import java.util.Objects;
import org.jboss.netty.buffer.ChannelBuffer;
import org.onosproject.bgpio.exceptions.BGPParseException;
import org.onosproject.bgpio.types.BGPErrorType;
import org.onosproject.bgpio.types.BGPValueType;
import org.onosproject.bgpio.util.Validation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.MoreObjects;
/**
* Implements BGP prefix IGP Flag attribute.
*/
public class BgpPrefixAttrIGPFlags implements BGPValueType {
protected static final Logger log = LoggerFactory
.getLogger(BgpPrefixAttrIGPFlags.class);
public static final int ATTR_PREFIX_FLAGBIT = 1152;
public static final int ATTR_PREFIX_FLAG_LEN = 1;
public static final int FIRST_BIT = 0x80;
public static final int SECOND_BIT = 0x40;
public static final int THIRD_BIT = 0x20;
public static final int FOURTH_BIT = 0x01;
/* Prefix IGP flag bit TLV */
private boolean bisisUpDownBit = false;
private boolean bOspfNoUnicastBit = false;
private boolean bOspfLclAddrBit = false;
private boolean bOspfNSSABit = false;
/**
* Constructor to initialize the value.
*
* @param bisisUpDownBit IS-IS Up/Down Bit
* @param bOspfNoUnicastBit OSPF no unicast Bit
* @param bOspfLclAddrBit OSPF local address Bit
* @param bOspfNSSABit OSPF propagate NSSA Bit
*/
BgpPrefixAttrIGPFlags(boolean bisisUpDownBit, boolean bOspfNoUnicastBit,
boolean bOspfLclAddrBit, boolean bOspfNSSABit) {
this.bisisUpDownBit = bisisUpDownBit;
this.bOspfNoUnicastBit = bOspfNoUnicastBit;
this.bOspfLclAddrBit = bOspfLclAddrBit;
this.bOspfNSSABit = bOspfNSSABit;
}
/**
* Reads the IGP Flags.
*
* @param cb ChannelBuffer
* @return object of BgpPrefixAttrIGPFlags
* @throws BGPParseException while parsing BgpPrefixAttrIGPFlags
*/
public static BgpPrefixAttrIGPFlags read(ChannelBuffer cb)
throws BGPParseException {
boolean bisisUpDownBit = false;
boolean bOspfNoUnicastBit = false;
boolean bOspfLclAddrBit = false;
boolean bOspfNSSABit = false;
short lsAttrLength = cb.readShort();
if ((lsAttrLength != ATTR_PREFIX_FLAG_LEN)
|| (cb.readableBytes() < lsAttrLength)) {
Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR,
BGPErrorType.ATTRIBUTE_LENGTH_ERROR,
lsAttrLength);
}
byte nodeFlagBits = cb.readByte();
bisisUpDownBit = ((nodeFlagBits & (byte) FIRST_BIT) == FIRST_BIT);
bOspfNoUnicastBit = ((nodeFlagBits & (byte) SECOND_BIT) == SECOND_BIT);
bOspfLclAddrBit = ((nodeFlagBits & (byte) THIRD_BIT) == THIRD_BIT);
bOspfNSSABit = ((nodeFlagBits & (byte) FOURTH_BIT) == FOURTH_BIT);
return new BgpPrefixAttrIGPFlags(bisisUpDownBit, bOspfNoUnicastBit,
bOspfLclAddrBit, bOspfNSSABit);
}
/**
* Returns the IS-IS Up/Down Bit set or not.
*
* @return IS-IS Up/Down Bit set or not
*/
boolean getisisUpDownBit() {
return bisisUpDownBit;
}
/**
* Returns the OSPF no unicast Bit set or not.
*
* @return OSPF no unicast Bit set or not
*/
boolean getOspfNoUnicastBit() {
return bOspfNoUnicastBit;
}
/**
* Returns the OSPF local address Bit set or not.
*
* @return OSPF local address Bit set or not
*/
boolean getOspfLclAddrBit() {
return bOspfLclAddrBit;
}
/**
* Returns the OSPF propagate NSSA Bit set or not.
*
* @return OSPF propagate NSSA Bit set or not
*/
boolean getOspfNSSABit() {
return bOspfNSSABit;
}
@Override
public short getType() {
return ATTR_PREFIX_FLAGBIT;
}
@Override
public int write(ChannelBuffer cb) {
// TODO This will be implemented in the next version
return 0;
}
@Override
public int hashCode() {
return Objects.hash(bisisUpDownBit, bOspfNoUnicastBit, bOspfLclAddrBit,
bOspfNSSABit);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof BgpPrefixAttrIGPFlags) {
BgpPrefixAttrIGPFlags other = (BgpPrefixAttrIGPFlags) obj;
return Objects.equals(bisisUpDownBit, other.bisisUpDownBit)
&& Objects.equals(bOspfNoUnicastBit,
other.bOspfNoUnicastBit)
&& Objects.equals(bOspfLclAddrBit, other.bOspfLclAddrBit)
&& Objects.equals(bOspfNSSABit, other.bOspfNSSABit);
}
return false;
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("bisisUpDownBit", bisisUpDownBit)
.add("bOspfNoUnicastBit", bOspfNoUnicastBit)
.add("bOspfLclAddrBit", bOspfLclAddrBit)
.add("bOspfNSSABit", bOspfNSSABit).toString();
}
}
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