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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 io.fd.honeycomb.translate.v3po.util.TranslateUtils;
import java.util.List;
import javax.annotation.Nonnull;
import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
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.actions.packet.handling.Permit;
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.openvpp.jvpp.core.dto.ClassifyAddDelSession;
import org.openvpp.jvpp.core.dto.ClassifyAddDelTable;
import org.openvpp.jvpp.core.dto.InputAclSetInterface;
import org.openvpp.jvpp.core.future.FutureJVppCore;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class AceEthWriter extends AbstractAceWriter<AceEth> {
private static final Logger LOG = LoggerFactory.getLogger(AceEthWriter.class);
public AceEthWriter(@Nonnull final FutureJVppCore futureJVppCore) {
super(futureJVppCore);
}
@Override
public ClassifyAddDelTable getClassifyAddDelTableRequest(@Nonnull final PacketHandling action,
@Nonnull final AceEth aceEth,
@Nonnull final int nextTableIndex) {
final ClassifyAddDelTable request = new ClassifyAddDelTable();
request.isAdd = 1;
request.tableIndex = -1; // value not present
request.nbuckets = 1; // we expect exactly one session per table
if (action instanceof Permit) {
request.missNextIndex = 0; // for list of permit rules, deny (0) should be default action
} else { // deny is default value
request.missNextIndex = -1; // for list of deny rules, permit (-1) should be default action
}
request.nextTableIndex = nextTableIndex;
request.mask = new byte[16];
boolean aceIsEmpty = true;
// destination-mac-address or destination-mac-address-mask is present =>
// ff:ff:ff:ff:ff:ff:00:00:00:00:00:00:00:00:00:00
if (aceEth.getDestinationMacAddressMask() != null) {
aceIsEmpty = false;
final String macAddress = aceEth.getDestinationMacAddressMask().getValue();
final List<String> parts = TranslateUtils.COLON_SPLITTER.splitToList(macAddress);
int i = 0;
for (String part : parts) {
request.mask[i++] = TranslateUtils.parseHexByte(part);
}
} else if (aceEth.getDestinationMacAddress() != null) {
aceIsEmpty = false;
for (int i = 0; i < 6; ++i) {
request.mask[i] = (byte) 0xff;
}
}
// source-mac-address or source-mac-address-mask =>
// 00:00:00:00:00:00:ff:ff:ff:ff:ff:ff:00:00:00:00
if (aceEth.getSourceMacAddressMask() != null) {
aceIsEmpty = false;
final String macAddress = aceEth.getSourceMacAddressMask().getValue();
final List<String> parts = TranslateUtils.COLON_SPLITTER.splitToList(macAddress);
int i = 6;
for (String part : parts) {
request.mask[i++] = TranslateUtils.parseHexByte(part);
}
} else if (aceEth.getSourceMacAddress() != null) {
aceIsEmpty = false;
for (int i = 6; i < 12; ++i) {
request.mask[i] = (byte) 0xff;
}
}
if (aceIsEmpty) {
throw new IllegalArgumentException(
String.format("Ace %s does not define packet field matches", aceEth.toString()));
}
request.skipNVectors = 0;
request.matchNVectors = request.mask.length / 16;
// TODO: minimise memory used by classify tables (we create a lot of them to make ietf-acl model
// mapping more convenient):
// according to https://wiki.fd.io/view/VPP/Introduction_To_N-tuple_Classifiers#Creating_a_classifier_table,
// classify table needs 16*(1 + match_n_vectors) bytes, but this does not quite work, so setting 8K for now
request.memorySize = 8 * 1024;
if (LOG.isDebugEnabled()) {
LOG.debug("ACE action={}, rule={} translated to table={}.", action, aceEth,
ReflectionToStringBuilder.toString(request));
}
return request;
}
@Override
public ClassifyAddDelSession getClassifyAddDelSessionRequest(@Nonnull final PacketHandling action,
@Nonnull final AceEth aceEth,
@Nonnull final int tableIndex) {
final ClassifyAddDelSession request = new ClassifyAddDelSession();
request.isAdd = 1;
request.tableIndex = tableIndex;
if (action instanceof Permit) {
request.hitNextIndex = -1;
} // deny (0) is default value
request.match = new byte[16];
boolean noMatch = true;
if (aceEth.getDestinationMacAddress() != null) {
noMatch = false;
final String macAddress = aceEth.getDestinationMacAddress().getValue();
final List<String> parts = TranslateUtils.COLON_SPLITTER.splitToList(macAddress);
int i = 0;
for (String part : parts) {
request.match[i++] = TranslateUtils.parseHexByte(part);
}
}
if (aceEth.getSourceMacAddress() != null) {
noMatch = false;
final String macAddress = aceEth.getSourceMacAddress().getValue();
final List<String> parts = TranslateUtils.COLON_SPLITTER.splitToList(macAddress);
int i = 6;
for (String part : parts) {
request.match[i++] = TranslateUtils.parseHexByte(part);
}
}
if (noMatch) {
throw new IllegalArgumentException(
String.format("Ace %s does not define neither source nor destination MAC address", aceEth.toString()));
}
if (LOG.isDebugEnabled()) {
LOG.debug("ACE action={}, rule={} translated to session={}.", action, aceEth,
ReflectionToStringBuilder.toString(request));
}
return request;
}
@Override
protected void setClassifyTable(@Nonnull final InputAclSetInterface request, final int tableIndex) {
request.l2TableIndex = tableIndex;
}
}
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