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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.vpp.util;
import java.util.Objects;
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;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* IPv4 address range representation.
*/
public final class Ipv4AddressRange {
private static final Logger LOG = LoggerFactory.getLogger(Ipv4AddressRange.class);
private final Ipv4AddressNoZone start;
private final Ipv4AddressNoZone end;
private Ipv4AddressRange(
@Nonnull final Ipv4AddressNoZone start,
@Nonnull final Ipv4AddressNoZone end) {
this.start = start;
this.end = end;
}
public Ipv4AddressNoZone getStart() {
return start;
}
public Ipv4AddressNoZone getEnd() {
return end;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final Ipv4AddressRange that = (Ipv4AddressRange) other;
return Objects.equals(start, that.start)
&& Objects.equals(end, that.end);
}
@Override
public int hashCode() {
return Objects.hash(start, end);
}
@Override
public String toString() {
return "Ipv4AddressRange{"
+ "start=" + start
+ ", end=" + end
+ '}';
}
/**
* Create address range from prefix.
*/
public static Ipv4AddressRange fromPrefix(@Nonnull final Ipv4Prefix prefix) {
final String addressString = prefix.getValue().split("/")[0];
byte prefixLength = Ipv4Translator.INSTANCE.extractPrefix(prefix);
if (prefixLength == 32) {
// 32 Prefix can be handled instantly
return new Ipv4AddressRange(new Ipv4AddressNoZone(addressString), new Ipv4AddressNoZone(addressString));
}
final byte[] prefixAddrBytes = Ipv4Translator.INSTANCE.ipv4AddressNoZoneToArray(addressString);
final byte[] prefixAddrBytes0 = new byte[prefixAddrBytes.length];
final byte[] prefixAddrBytesF = new byte[prefixAddrBytes.length];
byte index = 0;
while (prefixLength >= 8) {
prefixAddrBytes0[index] = prefixAddrBytes[index];
prefixAddrBytesF[index] = prefixAddrBytes[index];
index++;
prefixLength -= 8;
}
// Take care of the rest
if (prefixLength != 0) {
final int mask0 = (byte) (Math.pow(2, prefixLength) - 1) << (8 - prefixLength);
prefixAddrBytes0[index] = (byte) (prefixAddrBytes[index] & mask0);
final int maskF = (byte) (Math.pow(2, 8 - prefixLength) - 1);
prefixAddrBytesF[index] = (byte) (prefixAddrBytes[index] | maskF);
index++;
}
for (int i = index; i < 4; i++) {
prefixAddrBytes0[i] = 0;
prefixAddrBytesF[i] = (byte) 255;
}
return new Ipv4AddressRange(
Ipv4Translator.INSTANCE.arrayToIpv4AddressNoZoneReversed(prefixAddrBytes0),
Ipv4Translator.INSTANCE.arrayToIpv4AddressNoZoneReversed(prefixAddrBytesF));
}
}
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