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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.common;
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.vpp.util.JvppReplyConsumer;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import io.fd.vpp.jvpp.core.dto.ClassifyAddDelSession;
import io.fd.vpp.jvpp.core.dto.ClassifyAddDelSessionReply;
import io.fd.vpp.jvpp.core.dto.ClassifyAddDelTable;
import io.fd.vpp.jvpp.core.dto.ClassifyAddDelTableReply;
import io.fd.vpp.jvpp.core.future.FutureJVppCore;
import java.util.HashMap;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.concurrent.CompletionStage;
import java.util.function.Predicate;
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.actions.PacketHandling;
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.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.AceIpv6;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.acl.rev161214.InterfaceMode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.acl.rev161214.access.lists.acl.access.list.entries.ace.matches.ace.type.AceIpAndEth;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.acl.rev161214.ietf.acl.base.attributes.AccessLists;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.acl.rev161214.ietf.acl.base.attributes.access.lists.Acl;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class AbstractIetfAclWriter implements IetfAclWriter, JvppReplyConsumer, AclTranslator {
private static final Logger LOG = LoggerFactory.getLogger(AbstractIetfAclWriter.class);
private static final int NOT_DEFINED = -1;
protected final FutureJVppCore jvpp;
private Map<AclType, AceWriter<? extends AceType>> aceWriters = new HashMap<>();
public AbstractIetfAclWriter(@Nonnull final FutureJVppCore futureJVppCore) {
this.jvpp = Preconditions.checkNotNull(futureJVppCore, "futureJVppCore should not be null");
aceWriters.put(AclType.ETH, new AceEthWriter());
aceWriters.put(AclType.IP4, new AceIp4Writer());
aceWriters.put(AclType.IP6, new AceIp6Writer());
aceWriters.put(AclType.ETH_AND_IP, new AceIpAndEthWriter());
}
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(io.fd.honeycomb.translate.v3po.interfaces.acl.IetfAclWriter.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();
}
protected void removeClassifyTable(@Nonnull final InstanceIdentifier<?> id, final int tableIndex)
throws WriteFailedException {
if (tableIndex == -1) {
return; // classify table id is absent
}
final ClassifyAddDelTable request = new ClassifyAddDelTable();
request.tableIndex = tableIndex;
final CompletionStage<ClassifyAddDelTableReply> cs = jvpp.classifyAddDelTable(request);
getReplyForDelete(cs.toCompletableFuture(), id);
}
protected static boolean appliesToIp4Path(final Ace ace) {
final AceType aceType = ace.getMatches().getAceType();
final AclType aclType = AclType.fromAce(ace);
if (aclType == AclType.IP4) {
return true;
}
if (aclType == AclType.ETH) {
return true; // L2 only rules are possible for IP4 traffic
}
if (aclType == AclType.ETH_AND_IP && ((AceIpAndEth) aceType)
.getAceIpVersion() instanceof org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.acl.rev161214.access.lists.acl.access.list.entries.ace.matches.ace.type.ace.ip.and.eth.ace.ip.version.AceIpv4) {
return true;
}
return false;
}
protected static boolean appliesToIp6Path(final Ace ace) {
final AceType aceType = ace.getMatches().getAceType();
final AclType aclType = AclType.fromAce(ace);
if (aclType == AclType.IP6) {
return true;
}
if (aclType == AclType.ETH) {
return true; // L2 only rules are possible for IP6 traffic
}
if (aclType == AclType.ETH_AND_IP && ((AceIpAndEth) aceType)
.getAceIpVersion() instanceof org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.acl.rev161214.access.lists.acl.access.list.entries.ace.matches.ace.type.ace.ip.and.eth.ace.ip.version.AceIpv6) {
return true;
}
return false;
}
protected static List<Ace> getACEs(@Nonnull final List<Acl> acls, @Nonnull final WriteContext writeContext,
final Predicate<? super Ace> filter) {
return acls.stream().flatMap(acl -> aclToAceStream(acl, writeContext)).filter(filter)
.collect(Collectors.toList());
}
protected int writeAces(final InstanceIdentifier<?> id, final List<Ace> aces,
final AccessLists.DefaultAction defaultAction, final InterfaceMode mode,
final int vlanTags) throws WriteFailedException {
if (aces.isEmpty()) {
return NOT_DEFINED;
}
int nextTableIndex = configureDefaultAction(id, defaultAction);
final ListIterator<Ace> iterator = aces.listIterator(aces.size());
while (iterator.hasPrevious()) {
final Ace ace = iterator.previous();
LOG.trace("Processing ACE: {}", ace);
final AceWriter aceWriter =
aceWriters.get(AclType.fromAce(ace));
if (aceWriter == null) {
LOG.warn("AceProcessor for {} not registered. Skipping ACE.", ace.getClass());
} else {
final AceType aceType = ace.getMatches().getAceType();
final PacketHandling action = ace.getActions().getPacketHandling();
final ClassifyAddDelTable ctRequest = aceWriter.createTable(aceType, mode, nextTableIndex, vlanTags);
nextTableIndex = createClassifyTable(id, ctRequest);
final List<ClassifyAddDelSession> sessionRequests =
aceWriter.createSession(action, aceType, mode, nextTableIndex, vlanTags);
for (ClassifyAddDelSession csRequest : sessionRequests) {
createClassifySession(id, csRequest);
}
}
}
return nextTableIndex;
}
private int configureDefaultAction(@Nonnull final InstanceIdentifier<?> id,
final AccessLists.DefaultAction defaultAction)
throws WriteFailedException {
ClassifyAddDelTable ctRequest = createTable(-1);
if (AccessLists.DefaultAction.Permit.equals(defaultAction)) {
ctRequest.missNextIndex = -1;
} else {
ctRequest.missNextIndex = 0;
}
ctRequest.mask = new byte[16];
ctRequest.skipNVectors = 0;
ctRequest.matchNVectors = 1;
return createClassifyTable(id, ctRequest);
}
private int createClassifyTable(@Nonnull final InstanceIdentifier<?> id,
@Nonnull final ClassifyAddDelTable request)
throws WriteFailedException {
final CompletionStage<ClassifyAddDelTableReply> cs = jvpp.classifyAddDelTable(request);
final ClassifyAddDelTableReply reply = getReplyForWrite(cs.toCompletableFuture(), id);
return reply.newTableIndex;
}
private void createClassifySession(@Nonnull final InstanceIdentifier<?> id,
@Nonnull final ClassifyAddDelSession request)
throws WriteFailedException {
final CompletionStage<ClassifyAddDelSessionReply> cs = jvpp.classifyAddDelSession(request);
getReplyForWrite(cs.toCompletableFuture(), id);
}
private enum AclType {
ETH, IP4, IP6, ETH_AND_IP;
@Nonnull
private static AclType fromAce(final Ace ace) {
AclType result = null;
final AceType aceType;
try {
aceType = ace.getMatches().getAceType();
if (aceType instanceof AceEth) {
result = ETH;
} else if (aceType instanceof AceIp) {
final AceIpVersion aceIpVersion = ((AceIp) aceType).getAceIpVersion();
if (aceIpVersion == null) {
throw new IllegalArgumentException("Incomplete ACE (ip-version was not provided): " + ace);
}
if (aceIpVersion instanceof AceIpv4) {
result = IP4;
} else if (aceIpVersion instanceof AceIpv6) {
result = IP6;
}
} else if (aceType instanceof AceIpAndEth) {
result = ETH_AND_IP;
}
} catch (NullPointerException e) {
throw new IllegalArgumentException("Incomplete ACE: " + ace, e);
}
if (result == null) {
throw new IllegalArgumentException(String.format("Not supported ace type %s", aceType));
}
return result;
}
}
}
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