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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.honeycomb.translate.v3po.util;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.net.InetAddresses;
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.Ipv4AddressNoZone;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
/**
* Trait providing logic for translation of ipv4-related data
*/
public interface Ipv4Translator extends ByteDataTranslator {
/**
* Creates address array from address part of {@link Ipv4Prefix}
*/
default byte[] ipv4AddressPrefixToArray(@Nonnull final Ipv4Prefix ipv4Prefix) {
checkNotNull(ipv4Prefix, "Cannot convert null prefix");
byte[] retval = new byte[4];
String[] address = ipv4Prefix.getValue().substring(0, ipv4Prefix.getValue().indexOf('/')).split("\\.");
for (int d = 0; d < 4; d++) {
retval[d] = (byte) (Short.parseShort(address[d]) & 0xff);
}
return retval;
}
/**
* Extracts {@link Ipv4Prefix} prefix
*/
default byte extractPrefix(Ipv4Prefix data) {
checkNotNull(data, "Cannot extract from null");
return Byte.valueOf(data.getValue().substring(data.getValue().indexOf('/') + 1));
}
/**
* Converts byte array to {@link Ipv4Prefix} with specified prefixLength
*/
default Ipv4Prefix arrayToIpv4Prefix(final byte[] address, byte prefixLength) {
Ipv4AddressNoZone addressPart = arrayToIpv4AddressNoZone(address);
return new Ipv4Prefix(addressPart.getValue().concat("/").concat(String.valueOf(prefixLength)));
}
/**
* Parse byte array returned by VPP representing an Ipv4 address. Vpp returns IP byte arrays in reversed order.
*
* @return Ipv4AddressNoZone containing string representation of IPv4 address constructed from submitted bytes. No
* change in order.
*/
@Nonnull
default Ipv4AddressNoZone arrayToIpv4AddressNoZone(@Nonnull byte[] ip) {
// VPP sends ipv4 in a 16 byte array
if (ip.length == 16) {
ip = Arrays.copyOfRange(ip, 0, 4);
}
try {
// Not reversing the byte array here!! because the IP coming from VPP is in reversed byte order
// compared to byte order it was submitted
return new Ipv4AddressNoZone(InetAddresses.toAddrString(InetAddresses.fromLittleEndianByteArray(ip)));
} catch (UnknownHostException e) {
throw new IllegalArgumentException("Unable to parse ipv4", e);
}
}
/**
* Parse byte array returned by VPP representing an Ipv4 address. Vpp returns IP byte arrays in reversed order.
*
* @return Ipv4AddressNoZone containing string representation of IPv4 address constructed from submitted bytes. No
* change in order.
*/
@Nonnull
default Ipv4AddressNoZone arrayToIpv4AddressNoZoneReversed(@Nonnull byte[] ip) {
// VPP sends ipv4 in a 16 byte array
if (ip.length == 16) {
ip = Arrays.copyOfRange(ip, 0, 4);
}
ip = reverseBytes(ip);
try {
// Not reversing the byte array here!! because the IP coming from VPP is in reversed byte order
// compared to byte order it was submitted
return new Ipv4AddressNoZone(InetAddresses.toAddrString(InetAddresses.fromLittleEndianByteArray(ip)));
} catch (UnknownHostException e) {
throw new IllegalArgumentException("Unable to parse ipv4", e);
}
}
/**
* Transform Ipv4 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[] ipv4AddressNoZoneToArray(final Ipv4AddressNoZone ipv4Addr) {
return ipv4AddressNoZoneToArray(ipv4Addr.getValue());
}
default byte[] ipv4AddressNoZoneToArray(final String ipv4Addr) {
byte[] retval = new byte[4];
String[] dots = ipv4Addr.split("\\.");
for (int d = 0; d < 4; d++) {
retval[d] = (byte) (Short.parseShort(dots[d]) & 0xff);
}
return retval;
}
}
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