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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.acl.common;
import static com.google.common.base.Preconditions.checkArgument;
import io.fd.vpp.jvpp.core.dto.ClassifyAddDelSession;
import io.fd.vpp.jvpp.core.dto.ClassifyAddDelTable;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
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.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.ace.ip.version.AceIpv6;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.acl.rev170315.InterfaceMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
final class AceIp6Writer implements AceWriter<AceIp>, AclTranslator, Ip6AclTranslator {
private static final Logger LOG = LoggerFactory.getLogger(AceIp6Writer.class);
@Override
public ClassifyAddDelTable createTable(@Nonnull final AceIp aceIp,
@Nullable final InterfaceMode mode,
final int nextTableIndex,
final int vlanTags) {
checkArgument(aceIp.getAceIpVersion() instanceof AceIpv6, "Expected AceIpv6 version, but was %", aceIp);
final AceIpv6 ipVersion = (AceIpv6) aceIp.getAceIpVersion();
final int numberOfSessions = PortPair.fromRange(aceIp.getSourcePortRange(), aceIp.getDestinationPortRange()).size();
final ClassifyAddDelTable request = createTable(nextTableIndex, numberOfSessions);
request.skipNVectors = 0; // match entire L2 and L3 header
request.mask = new byte[getTableMaskLength(vlanTags)];
request.matchNVectors = request.mask.length/16;
final int baseOffset = getVlanTagsLen(vlanTags);
boolean aceIsEmpty = ip6Mask(baseOffset, mode, aceIp, ipVersion, request);
if (aceIsEmpty) {
throw new IllegalArgumentException(
String.format("Ace %s does not define packet field match values", aceIp.toString()));
}
LOG.debug("ACE rule={} translated to table={}.", aceIp, request);
return request;
}
private static int getTableMaskLength(final int vlanTags) {
if (vlanTags == 2) {
return 80;
} else {
return 64;
}
}
@Override
public List<ClassifyAddDelSession> createSession(@Nonnull final PacketHandling action,
@Nonnull final AceIp aceIp,
@Nullable final InterfaceMode mode,
final int tableIndex,
final int vlanTags) {
checkArgument(aceIp.getAceIpVersion() instanceof AceIpv6, "Expected AceIpv6 version, but was %", aceIp);
final AceIpv6 ipVersion = (AceIpv6) aceIp.getAceIpVersion();
final List<PortPair> portPairs =
PortPair.fromRange(aceIp.getSourcePortRange(), aceIp.getDestinationPortRange());
final List<ClassifyAddDelSession> requests = new ArrayList<>(portPairs.size());
for (final PortPair pair : portPairs) {
final ClassifyAddDelSession request = createSession(action, tableIndex);
request.match = new byte[getTableMaskLength(vlanTags)];
final int baseOffset = getVlanTagsLen(vlanTags);
boolean noMatch = ip6Match(baseOffset, mode, aceIp, ipVersion, pair.getSrc(), pair.getDst(), request);
if (noMatch) {
throw new IllegalArgumentException(
String.format("Ace %s does not define packet field match values", aceIp.toString()));
}
LOG.debug("ACE action={}, rule={} translated to session={}.", action, aceIp, request);
requests.add(request);
}
return requests;
}
}
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