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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.acl;
import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import java.util.Optional;
import java.util.stream.Stream;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.AccessLists;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.AclBase;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.Acl;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.AclKey;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppInterfaceAugmentation;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Writer customizer responsible for Access Control Lists management. Does not send any messages to VPP. All the config
* data are stored in HC and used when acl is assigned/unassigned to/from an interface.
*
* ACLs that are currently assigned to an interface cannot be updated/deleted.
*/
public class AclWriter implements ListWriterCustomizer<Acl, AclKey> {
public static final InstanceIdentifier<AccessLists> ACL_ID =
InstanceIdentifier.create(AccessLists.class);
private static final Logger LOG = LoggerFactory.getLogger(AclWriter.class);
@Override
public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Acl> id, @Nonnull final Acl dataAfter,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
LOG.debug("Creating ACL: iid={} dataAfter={}", id, dataAfter);
// no vpp call, just updates DataTree
}
@Override
public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Acl> id, @Nonnull final Acl dataBefore,
@Nonnull final Acl dataAfter, @Nonnull final WriteContext writeContext)
throws WriteFailedException {
LOG.debug("Updating ACL: iid={} dataBefore={} dataAfter={}", id, dataBefore, dataAfter);
if (isAssigned(dataAfter, writeContext)) {
throw new WriteFailedException(id,
String.format("Failed to update data at %s: acl %s is already assigned", id, dataAfter));
}
LOG.debug("Updating unassigned ACL: iid={} dataBefore={} dataAfter={}", id, dataBefore, dataAfter);
// no vpp call, just updates DataTree
}
@Override
public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Acl> id, @Nonnull final Acl dataBefore,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
LOG.debug("Deleting ACL: iid={} dataBefore={}", id, dataBefore);
if (isAssigned(dataBefore, writeContext)) {
throw new WriteFailedException(id,
String.format("Failed to delete data at %s: acl %s is already assigned", id, dataBefore));
}
LOG.debug("Deleting unassigned ACL: iid={} dataBefore={}", id, dataBefore);
// no vpp call, just updates DataTree
}
private static boolean isAssigned(@Nonnull final Acl acl,
@Nonnull final WriteContext writeContext) {
final String aclName = acl.getAclName();
final Class<? extends AclBase> aclType = acl.getAclType();
final Interfaces interfaces = writeContext.readAfter(InstanceIdentifier.create(Interfaces.class)).get();
return interfaces.getInterface().stream()
.map(i -> Optional.ofNullable(i.getAugmentation(VppInterfaceAugmentation.class))
.map(aug -> aug.getIetfAcl())
.map(ietfAcl -> ietfAcl.getAccessLists())
.map(accessLists -> accessLists.getAcl())
)
.flatMap(iacl -> iacl.isPresent()
? iacl.get().stream()
: Stream.empty())
.filter(assignedAcl -> aclName.equals(assignedAcl.getName()) && aclType.equals(assignedAcl.getType()))
.findFirst().isPresent();
}
}
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