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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.vpp.classifier.write;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
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.hc2vpp.vpp.classifier.context.VppClassifierContextManager;
import io.fd.honeycomb.translate.MappingContext;
import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import io.fd.vpp.jvpp.VppBaseCallException;
import io.fd.vpp.jvpp.core.dto.ClassifyAddDelSession;
import io.fd.vpp.jvpp.core.dto.ClassifyAddDelSessionReply;
import io.fd.vpp.jvpp.core.future.FutureJVppCore;
import java.util.concurrent.CompletionStage;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.xml.bind.DatatypeConverter;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.OpaqueIndex;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.classify.session.attributes.NextNode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.classify.session.attributes.next_node.Policer;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.classify.session.attributes.next_node.Standard;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.classify.table.base.attributes.ClassifySession;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.classify.table.base.attributes.ClassifySessionKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.vpp.classifier.ClassifyTable;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.vpp.classifier.ClassifyTableKey;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Writer customizer responsible for classify session create/delete.<br> Sends {@code classify_add_del_session} message
* to VPP.<br> Equivalent to invoking {@code vppctl classify table} command.
*/
public class ClassifySessionWriter extends VppNodeWriter
implements ListWriterCustomizer<ClassifySession, ClassifySessionKey>, ByteDataTranslator, JvppReplyConsumer {
private static final Logger LOG = LoggerFactory.getLogger(ClassifySessionWriter.class);
private final VppClassifierContextManager classifyTableContext;
private final NamingContext policerContext;
public ClassifySessionWriter(@Nonnull final FutureJVppCore futureJVppCore,
@Nonnull final VppClassifierContextManager classifyTableContext,
@Nonnull final NamingContext policerContext) {
super(futureJVppCore);
this.classifyTableContext = checkNotNull(classifyTableContext, "classifyTableContext should not be null");
this.policerContext = checkNotNull(policerContext, "policerContext should not be null");
}
@Override
public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<ClassifySession> id,
@Nonnull final ClassifySession dataAfter,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
LOG.debug("Creating classify session: iid={} dataAfter={}", id, dataAfter);
try {
classifyAddDelSession(true, id, dataAfter, writeContext);
LOG.debug("Successfully created classify session: iid={} dataAfter={}", id, dataAfter);
} catch (VppBaseCallException e) {
throw new WriteFailedException.CreateFailedException(id, dataAfter, e);
}
}
@Override
public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<ClassifySession> id,
@Nonnull final ClassifySession dataBefore,
@Nonnull final ClassifySession dataAfter,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
throw new UnsupportedOperationException("Classify session update is not supported");
}
@Override
public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<ClassifySession> id,
@Nonnull final ClassifySession dataBefore,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
LOG.debug("Removing classify session: iid={} dataBefore={}", id, dataBefore);
try {
classifyAddDelSession(false, id, dataBefore, writeContext);
LOG.debug("Successfully removed classify session: iid={} dataBefore={}", id, dataBefore);
} catch (VppBaseCallException e) {
throw new WriteFailedException.DeleteFailedException(id, e);
}
}
private void classifyAddDelSession(final boolean isAdd, @Nonnull final InstanceIdentifier<ClassifySession> id,
@Nonnull final ClassifySession classifySession,
@Nonnull final WriteContext writeContext)
throws VppBaseCallException, WriteFailedException {
final ClassifyTableKey tableKey = id.firstKeyOf(ClassifyTable.class);
Preconditions.checkArgument(tableKey != null, "could not find classify table key in {}", id);
final String tableName = tableKey.getName();
Preconditions.checkState(classifyTableContext.containsTable(tableName, writeContext.getMappingContext()),
"Could not find classify table index for {} in the classify table context", tableName);
final int tableIndex = classifyTableContext.getTableIndex(tableName, writeContext.getMappingContext());
final ClassifyTable classifyTable =
getClassifyTable(writeContext, id.firstIdentifierOf(ClassifyTable.class), isAdd);
final ClassifyAddDelSession request = getClassifyAddDelSessionRequest(isAdd, classifySession, tableIndex);
// TODO(HC2VPP-9): registry of next_node translators would allow to weaken dependency between policer
// and vpp-classifier models
final NextNode nextNode = classifySession.getNextNode();
if (nextNode instanceof Standard) {
translateNode(request, id, (Standard)nextNode, classifyTable, writeContext.getMappingContext());
} else if (nextNode instanceof Policer) {
translateNode(request, (Policer)nextNode, writeContext.getMappingContext());
}
final CompletionStage<ClassifyAddDelSessionReply> createClassifyTableReplyCompletionStage = getFutureJVpp()
.classifyAddDelSession(request);
getReplyForWrite(createClassifyTableReplyCompletionStage.toCompletableFuture(), id);
}
private void translateNode(final ClassifyAddDelSession request, final InstanceIdentifier<ClassifySession> id,
final Standard nextNode, final ClassifyTable classifyTable, final MappingContext ctx)
throws VppBaseCallException, WriteFailedException {
request.hitNextIndex = getNodeIndex(nextNode.getHitNext(), classifyTable, classifyTableContext, ctx, id);
request.opaqueIndex = getOpaqueIndex(nextNode.getOpaqueIndex(), classifyTable, ctx, id);
}
private void translateNode(final ClassifyAddDelSession request, final Policer policer, final MappingContext ctx) {
request.hitNextIndex = policerContext.getIndex(policer.getPolicerHitNext(), ctx);
request.opaqueIndex = policer.getColorClassfier().getIntValue();
}
private ClassifyTable getClassifyTable(final WriteContext writeContext,
@Nonnull final InstanceIdentifier<ClassifyTable> id,
final boolean isAdd) {
final Optional<ClassifyTable> classifyTable;
if (isAdd) {
classifyTable = writeContext.readAfter(id);
} else {
classifyTable = writeContext.readBefore(id);
}
return classifyTable.get();
}
private ClassifyAddDelSession getClassifyAddDelSessionRequest(final boolean isAdd,
@Nonnull final ClassifySession classifySession,
final int tableIndex) {
ClassifyAddDelSession request = new ClassifyAddDelSession();
request.isAdd = booleanToByte(isAdd);
request.tableIndex = tableIndex;
// default 0:
request.advance = classifySession.getAdvance();
request.match = DatatypeConverter.parseHexBinary(classifySession.getMatch().getValue().replace(":", ""));
return request;
}
private int getOpaqueIndex(@Nullable final OpaqueIndex opaqueIndex, final ClassifyTable classifyTable,
final MappingContext ctx, final InstanceIdentifier<ClassifySession> id)
throws VppBaseCallException, WriteFailedException {
if (opaqueIndex == null) {
return ~0; // value not specified
}
if (opaqueIndex.getUint32() != null) {
return opaqueIndex.getUint32().intValue();
} else {
return getNodeIndex(opaqueIndex.getVppNode(), classifyTable, classifyTableContext, ctx, id);
}
}
}
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