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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.v3po.translate.v3po.interfaces.ip;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.base.Optional;
import io.fd.honeycomb.v3po.translate.spi.write.ListWriterCustomizer;
import io.fd.honeycomb.v3po.translate.v3po.util.FutureJVppCustomizer;
import io.fd.honeycomb.v3po.translate.v3po.util.NamingContext;
import io.fd.honeycomb.v3po.translate.v3po.util.TranslateUtils;
import io.fd.honeycomb.v3po.translate.write.WriteContext;
import io.fd.honeycomb.v3po.translate.write.WriteFailedException;
import java.util.List;
import java.util.concurrent.CompletionStage;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.Ipv4;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.Address;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.AddressKey;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.address.Subnet;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.address.subnet.Netmask;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.address.subnet.PrefixLength;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.address.subnet.PrefixLengthBuilder;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.DottedQuad;
import org.opendaylight.yangtools.yang.binding.DataObject;
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;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Customizer for writing {@link Address}
*/
public class AddressCustomizer extends FutureJVppCustomizer implements ListWriterCustomizer<Address, AddressKey> {
private static final Logger LOG = LoggerFactory.getLogger(AddressCustomizer.class);
private final NamingContext interfaceContext;
public AddressCustomizer(FutureJVpp futureJvpp, NamingContext interfaceContext) {
super(futureJvpp);
this.interfaceContext = interfaceContext;
}
@Override
public void writeCurrentAttributes(InstanceIdentifier<Address> id, Address dataAfter, WriteContext writeContext)
throws WriteFailedException {
setAddress(true, id, dataAfter, writeContext);
}
@Override
public void updateCurrentAttributes(InstanceIdentifier<Address> id, Address dataBefore, Address dataAfter,
WriteContext writeContext) throws WriteFailedException {
throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter,
new UnsupportedOperationException("Operation not supported"));
}
@Override
public void deleteCurrentAttributes(InstanceIdentifier<Address> id, Address dataBefore, WriteContext writeContext)
throws WriteFailedException {
setAddress(false, id, dataBefore, writeContext);
}
@Override
public Optional<List<Address>> extract(InstanceIdentifier<Address> currentId, DataObject parentData) {
return Optional.fromNullable((((Ipv4) parentData).getAddress()));
}
private void setAddress(boolean add, final InstanceIdentifier<Address> id, final Address address,
final WriteContext writeContext) throws WriteFailedException {
final String interfaceName = id.firstKeyOf(Interface.class).getName();
final int swIfc = interfaceContext.getIndex(interfaceName, writeContext.getMappingContext());
Subnet subnet = address.getSubnet();
if (subnet instanceof PrefixLength) {
setPrefixLengthSubnet(add, id, interfaceName, swIfc, address, (PrefixLength) subnet);
} else if (subnet instanceof Netmask) {
setNetmaskSubnet(add, id, interfaceName, swIfc, address, (Netmask) subnet);
} else {
// FIXME how does choice extensibility work
// FIXME it is not even possible to create a dedicated
// customizer for Interconnection, since it's not a DataObject
// FIXME we might need a choice customizer
// THis choice is already from augment, so its probably not
// possible to augment augmented choice
LOG.error("Unable to handle subnet of type {}", subnet.getClass());
throw new WriteFailedException(id, "Unable to handle subnet of type " + subnet.getClass());
}
}
private void setNetmaskSubnet(final boolean add, final InstanceIdentifier<Address> id, final String name,
final int swIfc,
final Address ipv4Addr, final Netmask subnet) throws WriteFailedException {
LOG.debug("Setting Subnet(subnet-mask) for interface: {}, {}. Subnet: {}, Ipv4: {}", name, swIfc, subnet,
ipv4Addr);
byte[] addr = TranslateUtils.ipv4AddressNoZoneToArray(ipv4Addr.getIp());
final DottedQuad netmask = subnet.getNetmask();
checkNotNull(addr, "Null address");
checkNotNull(netmask, "Null netmask");
// find netmask bit-length
final short subnetLength = getSubnetMaskLength(netmask.getValue());
PrefixLengthBuilder lengthBuilder = new PrefixLengthBuilder().setPrefixLength(subnetLength);
setPrefixLengthSubnet(add, id, name, swIfc, ipv4Addr, lengthBuilder.build());
}
/**
* 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
*/
private static short getSubnetMaskLength(final String mask) {
String[] maskParts = mask.split("\\.");
final int DOTTED_QUAD_MASK_LENGHT = 4;
final int IPV4_ADDRESS_PART_BITS_COUNT = 8;
final int NETMASK_PART_LIMIT = 256; // 2 power to 8
checkArgument(maskParts.length == DOTTED_QUAD_MASK_LENGHT,
"Network mask %s is not in Quad Dotted Decimal notation!", mask);
long maskAsNumber = 0;
for (int i = 0; i < DOTTED_QUAD_MASK_LENGHT; 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_LENGHT,
"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 (short) leadingOnes;
}
private void setPrefixLengthSubnet(boolean add, final InstanceIdentifier<Address> id, final String name,
final int swIfc,
final Address address, final PrefixLength subnet) throws WriteFailedException {
try {
LOG.debug("Setting Subnet(prefix-length) for interface: {}, {}. Subnet: {}, Address: {}", name, swIfc,
subnet, address);
final Short plen = subnet.getPrefixLength();
checkArgument(plen > 0, "Invalid length");
final byte[] addr = TranslateUtils.ipv4AddressNoZoneToArray(address.getIp());
checkNotNull(addr, "Null address");
final CompletionStage<SwInterfaceAddDelAddressReply> swInterfaceAddDelAddressReplyCompletionStage =
getFutureJVpp()
.swInterfaceAddDelAddress(
getSwInterfaceAddDelAddressRequest(swIfc, TranslateUtils.booleanToByte(add) /* isAdd */,
(byte) 0 /* isIpv6 */, (byte) 0 /* delAll */, plen.byteValue(), addr));
TranslateUtils.getReplyForWrite(swInterfaceAddDelAddressReplyCompletionStage.toCompletableFuture(), id);
LOG.debug("Subnet(prefix-length) set successfully for interface: {}, {}, Subnet: {}, Address: {}", name,
swIfc, subnet, address);
} catch (VppBaseCallException e) {
LOG.warn("Failed to set Subnet(prefix-length) for interface: {}, {}, Subnet: {}, Address: {}", name, swIfc,
subnet, address);
throw new WriteFailedException(id, "Unable to handle subnet of type " + subnet.getClass(), e);
}
}
private 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;
}
}
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