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/*
* Copyright (c) 2017 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.nat.write.ifc;
import static com.google.common.base.Preconditions.checkArgument;
import io.fd.hc2vpp.common.translate.util.ByteDataTranslator;
import io.fd.hc2vpp.common.translate.util.JvppReplyConsumer;
import io.fd.hc2vpp.common.translate.util.NamingContext;
import io.fd.honeycomb.translate.spi.write.WriterCustomizer;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import io.fd.jvpp.nat.dto.Nat44InterfaceAddDelFeature;
import io.fd.jvpp.nat.dto.Nat44InterfaceAddDelOutputFeature;
import io.fd.jvpp.nat.dto.Nat64AddDelInterface;
import io.fd.jvpp.nat.future.FutureJVppNatFacade;
import io.fd.jvpp.nat.types.InterfaceIndex;
import io.fd.jvpp.nat.types.NatConfigFlags;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang._interface.nat.rev170816.InterfaceNatVppFeatureAttributes;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev180220.interfaces.Interface;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
abstract class AbstractInterfaceNatCustomizer<D extends InterfaceNatVppFeatureAttributes & DataObject>
implements ByteDataTranslator, JvppReplyConsumer, WriterCustomizer<D> {
private final FutureJVppNatFacade jvppNat;
private final NamingContext ifcContext;
AbstractInterfaceNatCustomizer(@Nonnull final FutureJVppNatFacade jvppNat,
@Nonnull final NamingContext ifcContext) {
this.jvppNat = jvppNat;
this.ifcContext = ifcContext;
}
@Override
public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<D> id, @Nonnull final D dataAfter,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
final String ifcName = getName(id);
getLog().debug("Enabling " + getType() + " NAT on interface: {}", ifcName);
getLog().debug("Enabling {} NAT: {}", dataAfter, id);
final int ifcIndex = ifcContext.getIndex(ifcName, writeContext.getMappingContext());
if (dataAfter.isPostRouting()) {
postRoutingNat(id, dataAfter, ifcIndex, true);
} else {
preRoutingNat(id, dataAfter, ifcIndex, true);
}
getLog().debug("NAT {} enabled successfully on: {}", dataAfter, ifcName);
}
@Override
public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<D> id,
@Nonnull final D dataBefore, @Nonnull final WriteContext writeContext)
throws WriteFailedException {
final String ifcName = getName(id);
getLog().debug("Disabling " + getType() + " NAT on interface: {}", ifcName);
getLog().debug("Disabling {} NAT: {}", dataBefore, id);
final int ifcIndex = ifcContext.getIndex(ifcName, writeContext.getMappingContext());
if (dataBefore.isPostRouting()) {
postRoutingNat(id, dataBefore, ifcIndex, false);
} else {
preRoutingNat(id, dataBefore, ifcIndex, false);
}
getLog().debug("NAT {} disabled successfully on: {}", dataBefore, ifcName);
}
protected String getName(final InstanceIdentifier<D> id) {
return id.firstKeyOf(Interface.class).getName();
}
private void postRoutingNat(@Nonnull final InstanceIdentifier<D> id, final D natAttributes, final int ifcIndex,
final boolean enable)
throws WriteFailedException {
checkArgument(!isNat64Supported(natAttributes), "Post routing Nat64 is not supported by VPP");
final Nat44InterfaceAddDelOutputFeature request = new Nat44InterfaceAddDelOutputFeature();
request.isAdd = enable;
if (request.flags == null) {
request.flags = new NatConfigFlags();
}
if (getType() == NatType.INBOUND) {
request.flags.add(NatConfigFlags.NatConfigFlagsOptions.NAT_IS_INSIDE);
} else if (getType() == NatType.OUTBOUND) {
request.flags.add(NatConfigFlags.NatConfigFlagsOptions.NAT_IS_OUTSIDE);
}
request.swIfIndex = new InterfaceIndex();
request.swIfIndex.interfaceindex = ifcIndex;
getReplyForWrite(jvppNat.nat44InterfaceAddDelOutputFeature(request).toCompletableFuture(), id);
}
private void preRoutingNat(@Nonnull final InstanceIdentifier<D> id, final D natAttributes, final int ifcIndex,
final boolean enable)
throws WriteFailedException {
if (natAttributes.isNat44Support()) {
// default value is defined for nat44-support, so no need for null check
preRoutingNat44(id, ifcIndex, enable);
}
if (isNat64Supported(natAttributes)) {
preRoutingNat64(id, ifcIndex, enable);
}
}
private boolean isNat64Supported(final D natAttributes) {
return natAttributes.isNat64Support() != null && natAttributes.isNat64Support();
}
private void preRoutingNat44(@Nonnull final InstanceIdentifier<D> id, final int ifcIndex, final boolean enable)
throws WriteFailedException {
final Nat44InterfaceAddDelFeature request = new Nat44InterfaceAddDelFeature();
request.isAdd = enable;
if (request.flags == null) {
request.flags = new NatConfigFlags();
}
if (getType() == NatType.INBOUND) {
request.flags.add(NatConfigFlags.NatConfigFlagsOptions.NAT_IS_INSIDE);
} else if (getType() == NatType.OUTBOUND) {
request.flags.add(NatConfigFlags.NatConfigFlagsOptions.NAT_IS_OUTSIDE);
}
request.swIfIndex = new InterfaceIndex();
request.swIfIndex.interfaceindex = ifcIndex;
getReplyForWrite(jvppNat.nat44InterfaceAddDelFeature(request).toCompletableFuture(), id);
}
private void preRoutingNat64(@Nonnull final InstanceIdentifier<D> id, final int ifcIndex, final boolean enable)
throws WriteFailedException {
final Nat64AddDelInterface request = new Nat64AddDelInterface();
request.isAdd = enable;
if (request.flags == null) {
request.flags = new NatConfigFlags();
}
if (getType() == NatType.INBOUND) {
request.flags.add(NatConfigFlags.NatConfigFlagsOptions.NAT_IS_INSIDE);
} else if (getType() == NatType.OUTBOUND) {
request.flags.add(NatConfigFlags.NatConfigFlagsOptions.NAT_IS_OUTSIDE);
}
request.swIfIndex = new InterfaceIndex();
request.swIfIndex.interfaceindex = ifcIndex;
getReplyForWrite(jvppNat.nat64AddDelInterface(request).toCompletableFuture(), id);
}
enum NatType {
INBOUND((byte) 1), OUTBOUND((byte) 0);
private final byte isInside;
NatType(final byte isInside) {
this.isInside = isInside;
}
}
abstract NatType getType();
abstract Logger getLog();
}
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