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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;
import static com.google.common.base.Preconditions.checkArgument;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import io.fd.honeycomb.translate.v3po.util.TranslateUtils;
import io.fd.honeycomb.translate.v3po.util.WriteTimeoutException;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletionStage;
import java.util.stream.Collectors;
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.AclBase;
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.access.control.list.rev160708.access.lists.acl.AccessListEntries;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.acl.access.list.entries.Ace;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.acl.access.list.entries.ace.matches.AceType;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.acl.access.list.entries.ace.matches.ace.type.AceEth;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.acl.access.list.entries.ace.matches.ace.type.AceIp;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.acl.access.list.entries.ace.matches.ace.type.ace.ip.AceIpVersion;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.acl.access.list.entries.ace.matches.ace.type.ace.ip.ace.ip.version.AceIpv4;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.ietf.acl.base.attributes.access.lists.Acl;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.openvpp.jvpp.VppBaseCallException;
import org.openvpp.jvpp.core.dto.ClassifyAddDelTable;
import org.openvpp.jvpp.core.dto.ClassifyAddDelTableReply;
import org.openvpp.jvpp.core.dto.ClassifyTableByInterface;
import org.openvpp.jvpp.core.dto.ClassifyTableByInterfaceReply;
import org.openvpp.jvpp.core.dto.InputAclSetInterface;
import org.openvpp.jvpp.core.dto.InputAclSetInterfaceReply;
import org.openvpp.jvpp.core.future.FutureJVppCore;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public final class IetfAClWriter {
private static final Logger LOG = LoggerFactory.getLogger(IetfAClWriter.class);
private final FutureJVppCore jvpp;
private Map<AclType, AceWriter> aceWriters = new HashMap<>();
public IetfAClWriter(@Nonnull final FutureJVppCore futureJVppCore) {
this.jvpp = Preconditions.checkNotNull(futureJVppCore, "futureJVppCore should not be null");
aceWriters.put(AclType.ETH, new AceEthWriter(futureJVppCore));
aceWriters.put(AclType.IP4, new AceIp4Writer(futureJVppCore));
aceWriters.put(AclType.IP6, new AceIp6Writer(futureJVppCore));
}
private static Stream<Ace> aclToAceStream(@Nonnull final Acl assignedAcl,
@Nonnull final WriteContext writeContext) {
final String aclName = assignedAcl.getName();
final Class<? extends AclBase> aclType = assignedAcl.getType();
// ietf-acl updates are handled first, so we use writeContext.readAfter
final Optional<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.Acl>
aclOptional = writeContext.readAfter(AclWriter.ACL_ID.child(
org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.Acl.class,
new AclKey(aclName, aclType)));
checkArgument(aclOptional.isPresent(), "Acl lists not configured");
final org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.Acl
acl = aclOptional.get();
final AccessListEntries accessListEntries = acl.getAccessListEntries();
checkArgument(accessListEntries != null, "access list entries not configured");
return accessListEntries.getAce().stream();
}
void deleteAcl(@Nonnull final InstanceIdentifier<?> id, final int swIfIndex)
throws WriteTimeoutException, WriteFailedException.DeleteFailedException {
final ClassifyTableByInterface request = new ClassifyTableByInterface();
request.swIfIndex = swIfIndex;
try {
final CompletionStage<ClassifyTableByInterfaceReply> cs = jvpp.classifyTableByInterface(request);
final ClassifyTableByInterfaceReply reply = TranslateUtils.getReplyForWrite(cs.toCompletableFuture(), id);
// We remove all ACL-related classify tables for given interface (we assume we are the only classify table
// manager)
removeClassifyTable(id, reply.l2TableId);
removeClassifyTable(id, reply.ip4TableId);
removeClassifyTable(id, reply.ip6TableId);
} catch (VppBaseCallException e) {
throw new WriteFailedException.DeleteFailedException(id, e);
}
}
private void removeClassifyTable(@Nonnull final InstanceIdentifier<?> id, final int tableIndex)
throws VppBaseCallException, WriteTimeoutException {
if (tableIndex == -1) {
return; // classify table id is absent
}
final ClassifyAddDelTable request = new ClassifyAddDelTable();
request.tableIndex = tableIndex;
final CompletionStage<ClassifyAddDelTableReply> cs = jvpp.classifyAddDelTable(request);
TranslateUtils.getReplyForWrite(cs.toCompletableFuture(), id);
}
void write(@Nonnull final InstanceIdentifier<?> id, final int swIfIndex, @Nonnull final List<Acl> acls,
@Nonnull final WriteContext writeContext)
throws VppBaseCallException, WriteTimeoutException {
// filter ACE entries and group by AceType
final Map<AclType, List<Ace>> acesByType = acls.stream()
.flatMap(acl -> aclToAceStream(acl, writeContext))
// TODO we should not tolerate nulls, but throw some meaningful exceptions instead
.filter(ace -> ace != null && ace.getMatches() != null && ace.getMatches().getAceType() != null &&
ace.getActions() != null && ace.getActions().getPacketHandling() != null)
.collect(Collectors.groupingBy(AclType::fromAce));
final InputAclSetInterface request = new InputAclSetInterface();
request.isAdd = 1;
request.swIfIndex = swIfIndex;
request.l2TableIndex = -1;
request.ip4TableIndex = -1;
request.ip6TableIndex = -1;
// for each AceType:
for (Map.Entry<AclType, List<Ace>> entry : acesByType.entrySet()) {
final AclType aceType = entry.getKey();
final List<Ace> aces = entry.getValue();
LOG.trace("Processing ACEs of {} type: {}", aceType, aces);
final AceWriter aceWriter = aceWriters.get(aceType);
if (aceWriter == null) {
LOG.warn("AceProcessor for {} not registered. Skipping ACE.", aceType);
} else {
aceWriter.write(id, aces, request);
}
}
final CompletionStage<InputAclSetInterfaceReply> inputAclSetInterfaceReplyCompletionStage =
jvpp.inputAclSetInterface(request);
TranslateUtils.getReplyForWrite(inputAclSetInterfaceReplyCompletionStage.toCompletableFuture(), id);
}
private enum AclType {
ETH, IP4, IP6;
@Nonnull
private static AclType fromAce(final Ace ace) {
AclType result = null;
final AceType aceType = ace.getMatches().getAceType();
if (aceType instanceof AceEth) {
result = ETH;
} else if (aceType instanceof AceIp) {
final AceIpVersion aceIpVersion = ((AceIp) aceType).getAceIpVersion();
if (aceIpVersion instanceof AceIpv4) {
result = IP4;
} else {
result = IP6;
}
}
if (result == null) {
throw new IllegalArgumentException(String.format("Not supported ace type %s", aceType));
}
return result;
}
}
}
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