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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
*
* 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 io.fd.hc2vpp.common.translate.util;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import com.google.common.net.InetAddresses;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Arrays;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Address;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6AddressNoZone;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Prefix;
/**
* Trait providing logic for translation of ipv6-related data
*/
public interface Ipv6Translator extends ByteDataTranslator {
/**
* Transform Ipv6 address to a byte array acceptable by VPP. VPP expects incoming byte array to be in the same order
* as the address.
*
* @return byte array with address bytes
*/
default byte[] ipv6AddressNoZoneToArray(@Nonnull final Ipv6Address address) {
return Impl.ipv6AddressNoZoneToArray(address.getValue());
}
/**
* Transform Ipv6 address to a byte array acceptable by VPP. VPP expects incoming byte array to be in the same order
* as the address.
*
* @return byte array with address bytes
*/
default byte[] ipv6AddressNoZoneToArray(@Nonnull final Ipv6AddressNoZone ipv6Addr) {
return Impl.ipv6AddressNoZoneToArray(ipv6Addr.getValue());
}
/**
* Creates address array from address part of {@link Ipv6Prefix}
*/
default byte[] ipv6AddressPrefixToArray(@Nonnull final Ipv6Prefix ipv6Prefix) {
checkNotNull(ipv6Prefix, "Cannot convert null prefix");
return ipv6AddressNoZoneToArray(new Ipv6AddressNoZone(
new Ipv6Address(ipv6Prefix.getValue().substring(0, ipv6Prefix.getValue().indexOf('/')))));
}
/**
* Extracts {@link Ipv6Prefix} prefix
*/
default byte extractPrefix(Ipv6Prefix data) {
checkNotNull(data, "Cannot extract from null");
return Byte.valueOf(data.getValue().substring(data.getValue().indexOf('/') + 1));
}
/**
* Converts byte array to {@link Ipv6Prefix} with specified prefixLength
*/
default Ipv6Prefix arrayToIpv6Prefix(final byte[] address, int prefixLength) {
Ipv6AddressNoZone addressPart = arrayToIpv6AddressNoZone(address);
return new Ipv6Prefix(addressPart.getValue().concat("/").concat(String.valueOf(prefixLength)));
}
/**
* Parse byte array returned by VPP representing an Ipv6 address. Expects array in non-reversed order
*
* @return Ipv6ddressNoZone containing string representation of IPv6 address constructed from submitted bytes. No
* change in order.
*/
@Nonnull
default Ipv6AddressNoZone arrayToIpv6AddressNoZone(@Nonnull byte[] ip) {
checkArgument(ip.length == 16, "Illegal array length");
try {
return new Ipv6AddressNoZone(InetAddresses.toAddrString(InetAddress.getByAddress(ip)));
} catch (UnknownHostException e) {
throw new IllegalArgumentException("Unable to parse ipv6", e);
}
}
/**
* Detects whether {@code IpAddress} is ipv6
*/
default boolean isIpv6(@Nonnull final IpAddress address) {
checkState(!(address.getIpv4Address() == null && address.getIpv6Address() == null), "Invalid address");
return address.getIpv6Address() != null;
}
/**
* Detects whether {@code IpPrefix} is ipv6
*/
default boolean isIpv6(@Nonnull final IpPrefix address) {
checkState(!(address.getIpv4Prefix() == null && address.getIpv6Prefix() == null), "Invalid address");
return address.getIpv6Prefix() != null;
}
/**
* Sets correct length of ip4 array in case vpp returns array of length greater than 4.
* @param ip array to be truncated
* @return ip array of length 4
*/
default byte[] truncateIp4Array(final byte[] ip) {
// 16, which causes problems for toIpv4Prefix
final byte[] result = new byte[4];
System.arraycopy(ip, 0, result, 0, 4);
return result;
}
default Ipv6Prefix toIpv6Prefix(final byte[] address, final int prefix) {
try {
return new Ipv6Prefix(
String.format("%s/%s", InetAddress.getByAddress(address).getHostAddress(),
String.valueOf(prefix)));
} catch (UnknownHostException e) {
throw new IllegalArgumentException(
"Cannot create prefix for address[" + Arrays.toString(address) + "],prefix[" + prefix + "]");
}
}
class Impl {
private static byte[] ipv6AddressNoZoneToArray(@Nonnull final String address){
try {
// No lookup performed for literal ipv6 addresses
return InetAddress.getByName(address).getAddress();
} catch (UnknownHostException e) {
throw new IllegalArgumentException("Invalid address supplied", e);
}
}
}
}
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