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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.onlab.packet.Ip4Address;
import org.onlab.packet.Ip6Address;
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 OSPF Forwarding address attribute.
*/
public class BgpPrefixAttrOspfFwdAddr implements BGPValueType {
protected static final Logger log = LoggerFactory
.getLogger(BgpPrefixAttrOspfFwdAddr.class);
public static final int ATTR_PREFIX_OSPFFWDADDR = 1156;
public static final int IPV4_LEN = 4;
public static final int IPV6_LEN = 16;
/* OSPF Forwarding Address */
private final short lsAttrLength;
private final Ip4Address ip4RouterId;
private final Ip6Address ip6RouterId;
/**
* Constructor to initialize the value.
*
* @param lsAttrLength length of the IP address
* @param ip4RouterId Valid IPV4 address if length is 4 else null
* @param ip6RouterId Valid IPV6 address if length is 16 else null
*/
public BgpPrefixAttrOspfFwdAddr(short lsAttrLength, Ip4Address ip4RouterId,
Ip6Address ip6RouterId) {
this.lsAttrLength = lsAttrLength;
this.ip4RouterId = ip4RouterId;
this.ip6RouterId = ip6RouterId;
}
/**
* Returns object of this class with specified values.
*
* @param lsAttrLength length of the IP address
* @param ip4RouterId Valid IPV4 address if length is 4 else null
* @param ip6RouterId Valid IPV6 address if length is 16 else null
* @return object of BgpPrefixAttrOspfFwdAddr
*/
public static BgpPrefixAttrOspfFwdAddr of(final short lsAttrLength,
final Ip4Address ip4RouterId,
final Ip6Address ip6RouterId) {
return new BgpPrefixAttrOspfFwdAddr(lsAttrLength, ip4RouterId,
ip6RouterId);
}
/**
* Reads the OSPF Forwarding Address.
*
* @param cb ChannelBuffer
* @return object of BgpPrefixAttrOSPFFwdAddr
* @throws BGPParseException while parsing BgpPrefixAttrOspfFwdAddr
*/
public static BgpPrefixAttrOspfFwdAddr read(ChannelBuffer cb)
throws BGPParseException {
short lsAttrLength;
byte[] ipBytes;
Ip4Address ip4RouterId = null;
Ip6Address ip6RouterId = null;
lsAttrLength = cb.readShort();
ipBytes = new byte[lsAttrLength];
if ((cb.readableBytes() < lsAttrLength)) {
Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR,
BGPErrorType.ATTRIBUTE_LENGTH_ERROR,
lsAttrLength);
}
cb.readBytes(ipBytes);
if (IPV4_LEN == lsAttrLength) {
ip4RouterId = Ip4Address.valueOf(ipBytes);
} else if (IPV6_LEN == lsAttrLength) {
ip6RouterId = Ip6Address.valueOf(ipBytes);
}
return BgpPrefixAttrOspfFwdAddr.of(lsAttrLength, ip4RouterId,
ip6RouterId);
}
/**
* Returns IPV4 Address of OSPF forwarding address.
*
* @return IPV4 address
*/
public Ip4Address ospfv4FwdAddr() {
return ip4RouterId;
}
/**
* Returns IPV6 Address of OSPF forwarding address.
*
* @return IPV6 address
*/
public Ip6Address ospfv6FwdAddr() {
return ip6RouterId;
}
/**
* Returns OSPF forwarding address length.
*
* @return length of the ip address
*/
public short ospfFwdAddrLen() {
return lsAttrLength;
}
@Override
public short getType() {
return ATTR_PREFIX_OSPFFWDADDR;
}
@Override
public int hashCode() {
if (IPV4_LEN == lsAttrLength) {
return Objects.hash(ip4RouterId);
} else {
return Objects.hash(ip6RouterId);
}
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof BgpPrefixAttrOspfFwdAddr) {
BgpPrefixAttrOspfFwdAddr other = (BgpPrefixAttrOspfFwdAddr) obj;
if (IPV4_LEN == lsAttrLength) {
return Objects.equals(ip4RouterId, other.ip4RouterId);
} else {
return Objects.equals(ip6RouterId, other.ip6RouterId);
}
}
return false;
}
@Override
public int write(ChannelBuffer cb) {
// TODO This will be implemented in the next version
return 0;
}
@Override
public String toString() {
if (IPV4_LEN == lsAttrLength) {
return MoreObjects.toStringHelper(getClass()).omitNullValues()
.add("ip4RouterId", ip4RouterId).toString();
} else {
return MoreObjects.toStringHelper(getClass()).omitNullValues()
.add("ip6RouterId", ip6RouterId).toString();
}
}
}
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