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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.annotations.VisibleForTesting;
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.AceIpv4;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.acl.rev161214.InterfaceMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
final class AceIp4Writer implements AceWriter<AceIp>, AclTranslator, Ip4AclTranslator {
@VisibleForTesting
static final int MATCH_N_VECTORS = 3; // number of 16B vectors
private static final int TABLE_MASK_LENGTH = 48;
private static final Logger LOG = LoggerFactory.getLogger(AceIp4Writer.class);
@Override
public ClassifyAddDelTable createTable(@Nonnull final AceIp aceIp,
@Nullable final InterfaceMode mode,
final int nextTableIndex,
final int vlanTags) {
checkArgument(aceIp.getAceIpVersion() instanceof AceIpv4, "Expected AceIpv4 version, but was %", aceIp);
final AceIpv4 ipVersion = (AceIpv4) 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.matchNVectors = MATCH_N_VECTORS;
request.mask = new byte[TABLE_MASK_LENGTH];
final int baseOffset = getVlanTagsLen(vlanTags);
boolean aceIsEmpty = ip4Mask(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;
}
@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 AceIpv4, "Expected AceIpv4 version, but was %", aceIp);
final AceIpv4 ipVersion = (AceIpv4) 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[TABLE_MASK_LENGTH];
final int baseOffset = getVlanTagsLen(vlanTags);
boolean noMatch = ip4Match(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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