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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.acl.ingress;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import static io.fd.honeycomb.translate.vpp.util.SubInterfaceUtils.getNumberOfTags;
import com.google.common.base.Optional;
import io.fd.honeycomb.translate.spi.write.WriterCustomizer;
import io.fd.honeycomb.translate.vpp.util.NamingContext;
import io.fd.honeycomb.translate.vpp.util.SubInterfaceUtils;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import io.fd.vpp.jvpp.VppBaseCallException;
import javax.annotation.Nonnull;
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.interfaces.rev140508.interfaces.InterfaceKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.ietf.acl.base.attributes.AccessLists;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.vlan.rev150527.interfaces._interface.sub.interfaces.SubInterface;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.vlan.rev150527.interfaces._interface.sub.interfaces.SubInterfaceKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.vlan.rev150527.sub._interface.base.attributes.ietf.acl.Ingress;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Customizer for enabling/disabling ingress ACLs for given sub-interface (as defined in ietf-acl model).
*
* The customizer assumes it owns classify table management for sub-interfaces where ietf-acl container is present.
* Using low level classifier model or direct changes to classify tables in combination with ietf-acls are not supported
* and can result in unpredictable behaviour.
*/
public class SubInterfaceIetfAclCustomizer implements WriterCustomizer<Ingress> {
private static final Logger LOG = LoggerFactory.getLogger(SubInterfaceIetfAclCustomizer.class);
private final IetfAClWriter aclWriter;
private final NamingContext interfaceContext;
public SubInterfaceIetfAclCustomizer(@Nonnull final IetfAClWriter aclWriter,
@Nonnull final NamingContext interfaceContext) {
this.aclWriter = checkNotNull(aclWriter, "aclWriter should not be null");
this.interfaceContext = checkNotNull(interfaceContext, "interfaceContext should not be null");
}
private String getSubInterfaceName(@Nonnull final InstanceIdentifier<Ingress> id) {
final InterfaceKey parentInterfacekey = id.firstKeyOf(Interface.class);
final SubInterfaceKey subInterfacekey = id.firstKeyOf(SubInterface.class);
return SubInterfaceUtils
.getSubInterfaceName(parentInterfacekey.getName(), subInterfacekey.getIdentifier().intValue());
}
@Override
public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Ingress> id, @Nonnull final Ingress dataAfter,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
final String subInterfaceName = getSubInterfaceName(id);
final int subInterfaceIndex = interfaceContext.getIndex(subInterfaceName, writeContext.getMappingContext());
LOG.debug("Adding IETF-ACL for sub-interface: {}(id={}): {}", subInterfaceName, subInterfaceIndex, dataAfter);
final AccessLists accessLists = dataAfter.getAccessLists();
checkArgument(accessLists != null && accessLists.getAcl() != null,
"ietf-acl container does not define acl list");
final Optional<SubInterface> subInterfaceOptional =
writeContext.readAfter(id.firstIdentifierOf(SubInterface.class));
checkState(subInterfaceOptional.isPresent(), "Could not read SubInterface data object for %s", id);
final SubInterface subInterface = subInterfaceOptional.get();
try {
aclWriter.write(id, subInterfaceIndex, accessLists.getAcl(), writeContext,
getNumberOfTags(subInterface.getTags()));
} catch (VppBaseCallException e) {
throw new WriteFailedException.CreateFailedException(id, dataAfter, e);
}
}
@Override
public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Ingress> id,
@Nonnull final Ingress dataBefore, @Nonnull final Ingress dataAfter,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
LOG.debug("Sub-interface ACLs update: removing previously configured ACLs");
deleteCurrentAttributes(id, dataBefore, writeContext);
LOG.debug("Sub-interface ACLs update: adding updated ACLs");
writeCurrentAttributes(id, dataAfter, writeContext);
LOG.debug("Sub-interface ACLs update was successful");
}
@Override
public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Ingress> id,
@Nonnull final Ingress dataBefore, @Nonnull final WriteContext writeContext)
throws WriteFailedException {
final String subInterfaceName = getSubInterfaceName(id);
final int subInterfaceIndex = interfaceContext.getIndex(subInterfaceName, writeContext.getMappingContext());
LOG.debug("Removing ACLs for sub-interface={}(id={}): {}", subInterfaceName, subInterfaceIndex, dataBefore);
aclWriter.deleteAcl(id, subInterfaceIndex);
}
}
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