org.opendaylight.bgp.concepts.IpAddressUtil Maven / Gradle / Ivy
/*
* Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.bgp.concepts;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import org.eclipse.jdt.annotation.NonNull;
import org.opendaylight.protocol.util.Ipv4Util;
import org.opendaylight.protocol.util.Ipv6Util;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddressNoZone;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4AddressNoZone;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6AddressNoZone;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Utility class for IpAddress models type(like Originator Route Ip) serialization and parsing.
*
* @author Claudio D. Gasparini
*/
public final class IpAddressUtil {
private static final Logger LOG = LoggerFactory.getLogger(IpAddressUtil.class);
private IpAddressUtil() {
// Hidden on purpose
}
/**
* Returns IpAddress from byte array containing ipAddress lenght + ipAddress.
*
* @param buffer containing ip address
* @return IpAddressNoZone
*/
public static @NonNull IpAddressNoZone addressForByteBuf(final ByteBuf buffer) {
final int ipLength = buffer.readUnsignedByte();
if (ipLength == Ipv6Util.IPV6_BITS_LENGTH) {
return new IpAddressNoZone(Ipv6Util.addressForByteBuf(buffer));
} else if (ipLength == Ipv4Util.IP4_BITS_LENGTH) {
return new IpAddressNoZone(Ipv4Util.addressForByteBuf(buffer));
}
throw new IllegalStateException("Unexpected size");
}
/**
* Returns IpAddress from byte array containing ipAddress based on ByteArray length.
*
* @param buffer containing ip address
* @return IpAddressNoZone
*/
public static @NonNull IpAddressNoZone addressForByteBufWOLength(final ByteBuf buffer) {
final int ipLength = buffer.readableBytes();
if (ipLength == Ipv6Util.IPV6_LENGTH) {
return new IpAddressNoZone(Ipv6Util.addressForByteBuf(buffer));
} else if (ipLength == Ipv4Util.IP4_LENGTH) {
return new IpAddressNoZone(Ipv4Util.addressForByteBuf(buffer));
}
throw new IllegalStateException("Unexpected size");
}
/**
* Returns byte array containing IpAddress length and IpAddress.
*
* @param address containing ipv4 or ipv6 address
* @return byte array
*/
public static @NonNull ByteBuf bytesFor(final IpAddressNoZone address) {
final ByteBuf body = Unpooled.buffer();
if (address.getIpv4AddressNoZone() != null) {
body.writeByte(Ipv4Util.IP4_BITS_LENGTH);
body.writeBytes(Ipv4Util.bytesForAddress(address.getIpv4AddressNoZone()));
} else if (address.getIpv6AddressNoZone() != null) {
body.writeByte(Ipv6Util.IPV6_BITS_LENGTH);
body.writeBytes(Ipv6Util.bytesForAddress(address.getIpv6AddressNoZone()));
} else {
body.writeByte(0);
}
return body;
}
/**
* Returns byte array containing IpAddress.
*
* @param address containing ipv4 or ipv6 address
* @return byte array
*/
public static @NonNull ByteBuf bytesWOLengthFor(final IpAddressNoZone address) {
final ByteBuf body = Unpooled.buffer();
if (address.getIpv4AddressNoZone() != null) {
body.writeBytes(Ipv4Util.bytesForAddress(address.getIpv4AddressNoZone()));
} else if (address.getIpv6AddressNoZone() != null) {
body.writeBytes(Ipv6Util.bytesForAddress(address.getIpv6AddressNoZone()));
} else {
body.writeByte(0);
}
return body;
}
public static IpAddressNoZone extractIpAddress(final DataContainerNode route, final NodeIdentifier rdNid) {
final var rdNode = NormalizedNodes.findNode(route, rdNid).orElse(null);
if (rdNode == null) {
return null;
}
final var body = rdNode.body();
if (!(body instanceof String str)) {
throw new IllegalArgumentException("Impected body " + body);
}
try {
return new IpAddressNoZone(new Ipv4AddressNoZone(str));
} catch (IllegalArgumentException e) {
LOG.debug("Failed to interpret {} as an Ipv4AddressNoZone", str);
}
return new IpAddressNoZone(new Ipv6AddressNoZone(str));
}
}
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