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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.interfaces.ip;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import io.fd.honeycomb.translate.v3po.util.TranslateUtils;
import io.fd.honeycomb.translate.v3po.util.WriteTimeoutException;
import java.util.concurrent.CompletionStage;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4AddressNoZone;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.openvpp.jvpp.VppBaseCallException;
import org.openvpp.jvpp.dto.SwInterfaceAddDelAddress;
import org.openvpp.jvpp.dto.SwInterfaceAddDelAddressReply;
import org.openvpp.jvpp.future.FutureJVpp;
/**
* Utility class providing Ipv4 CUD support.
*/
// TODO replace with interface with default methods or abstract class
final class Ipv4WriteUtils {
private static final int DOTTED_QUAD_MASK_LENGTH = 4;
private static final int IPV4_ADDRESS_PART_BITS_COUNT = 8;
private static final int NETMASK_PART_LIMIT = 256; // 2 power to 8
private Ipv4WriteUtils() {
throw new UnsupportedOperationException("This utility class cannot be instantiated");
}
static void addDelAddress(@Nonnull final FutureJVpp futureJvpp, final boolean add, final InstanceIdentifier<?> id,
@Nonnegative final int ifaceId,
@Nonnull final Ipv4AddressNoZone address, @Nonnegative final byte prefixLength)
throws VppBaseCallException, WriteTimeoutException {
checkArgument(prefixLength > 0, "Invalid prefix length");
checkNotNull(address, "address should not be null");
final byte[] addressBytes = TranslateUtils.ipv4AddressNoZoneToArray(address);
final CompletionStage<SwInterfaceAddDelAddressReply> swInterfaceAddDelAddressReplyCompletionStage =
futureJvpp.swInterfaceAddDelAddress(
getSwInterfaceAddDelAddressRequest(ifaceId, TranslateUtils.booleanToByte(add) /* isAdd */,
(byte) 0 /* isIpv6 */, (byte) 0 /* delAll */, prefixLength, addressBytes));
TranslateUtils.getReplyForWrite(swInterfaceAddDelAddressReplyCompletionStage.toCompletableFuture(), id);
}
static SwInterfaceAddDelAddress getSwInterfaceAddDelAddressRequest(final int swIfc, final byte isAdd,
final byte ipv6, final byte deleteAll,
final byte length, final byte[] addr) {
final SwInterfaceAddDelAddress swInterfaceAddDelAddress = new SwInterfaceAddDelAddress();
swInterfaceAddDelAddress.swIfIndex = swIfc;
swInterfaceAddDelAddress.isAdd = isAdd;
swInterfaceAddDelAddress.isIpv6 = ipv6;
swInterfaceAddDelAddress.delAll = deleteAll;
swInterfaceAddDelAddress.address = addr;
swInterfaceAddDelAddress.addressLength = length;
return swInterfaceAddDelAddress;
}
/**
* Returns the prefix size in bits of the specified subnet mask. Example: For the subnet mask 255.255.255.128 it
* returns 25 while for 255.0.0.0 it returns 8. If the passed subnetMask array is not complete or contains not only
* leading ones, IllegalArgumentExpression is thrown
*
* @param mask the subnet mask in dot notation 255.255.255.255
* @return the prefix length as number of bits
*/
static byte getSubnetMaskLength(final String mask) {
String[] maskParts = mask.split("\\.");
checkArgument(maskParts.length == DOTTED_QUAD_MASK_LENGTH,
"Network mask %s is not in Quad Dotted Decimal notation!", mask);
long maskAsNumber = 0;
for (int i = 0; i < DOTTED_QUAD_MASK_LENGTH; i++) {
maskAsNumber <<= IPV4_ADDRESS_PART_BITS_COUNT;
int value = Integer.parseInt(maskParts[i]);
checkArgument(value < NETMASK_PART_LIMIT, "Network mask %s contains invalid number(s) over 255!", mask);
checkArgument(value >= 0, "Network mask %s contains invalid negative number(s)!", mask);
maskAsNumber += value;
}
String bits = Long.toBinaryString(maskAsNumber);
checkArgument(bits.length() == IPV4_ADDRESS_PART_BITS_COUNT * DOTTED_QUAD_MASK_LENGTH,
"Incorrect network mask %s", mask);
final int leadingOnes = bits.indexOf('0');
checkArgument(leadingOnes != -1, "Broadcast address %s is not allowed!", mask);
checkArgument(bits.substring(leadingOnes).indexOf('1') == -1,
"Non-contiguous network mask %s is not allowed!", mask);
return (byte) leadingOnes;
}
}
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