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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.mpls;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310.StaticLspConfig.Operation.ImposeAndForward;
import com.google.common.annotations.VisibleForTesting;
import io.fd.hc2vpp.common.translate.util.ByteDataTranslator;
import io.fd.hc2vpp.common.translate.util.FutureJVppCustomizer;
import io.fd.hc2vpp.common.translate.util.Ipv4Translator;
import io.fd.hc2vpp.common.translate.util.JvppReplyConsumer;
import io.fd.hc2vpp.common.translate.util.NamingContext;
import io.fd.honeycomb.translate.MappingContext;
import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import io.fd.vpp.jvpp.core.dto.IpAddDelRoute;
import io.fd.vpp.jvpp.core.future.FutureJVppCore;
import java.util.List;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310.StaticLspConfig;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310._static.lsp.Config;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310._static.lsp_config.InSegment;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310._static.lsp_config.OutSegment;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310._static.lsp_config.in.segment.type.IpPrefix;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310._static.lsp_config.out.segment.PathList;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310._static.lsp_config.out.segment.SimplePath;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310._static.lsp_config.out.segment.path.list.Paths;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310.routing.mpls._static.lsps.StaticLsp;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310.routing.mpls._static.lsps.StaticLspKey;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev170227.MplsLabel;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
final class StaticLspCustomizer extends FutureJVppCustomizer implements
ListWriterCustomizer<StaticLsp, StaticLspKey>, JvppReplyConsumer, ByteDataTranslator, Ipv4Translator {
private static final Logger LOG = LoggerFactory.getLogger(StaticLspCustomizer.class);
/**
* Maximum number of MPLS labels supported by VPP. Value is based on type of next_hop_n_out_labels value which is
* u8.
*/
private static final int MAX_LABELS = 255;
/**
* Constant used by VPP to disable optional parameters of mpls label type.
*/
@VisibleForTesting
static final int MPLS_LABEL_INVALID = 0x100000;
private final NamingContext interfaceContext;
StaticLspCustomizer(@Nonnull final FutureJVppCore vppApi, @Nonnull NamingContext interfaceContext) {
super(vppApi);
this.interfaceContext = checkNotNull(interfaceContext, "interfaceContext should not be null");
}
@Override
public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<StaticLsp> id,
@Nonnull final StaticLsp dataAfter,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
LOG.debug("Adding MPLS LSP: {}", dataAfter);
imposeAndForward(id, validateConfig(dataAfter), writeContext, true);
LOG.debug("MPLS LSP successfully configured: {}", dataAfter);
}
@Override
public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<StaticLsp> id,
@Nonnull final StaticLsp dataBefore,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
LOG.debug("Removing MPLS LSP: {}", dataBefore);
imposeAndForward(id, validateConfig(dataBefore), writeContext, false);
LOG.debug("MPLS LSP successfully removed: {}", dataBefore);
}
private static Config validateConfig(@Nonnull final StaticLsp data) {
final Config config = data.getConfig();
checkArgument(config != null, "Config node of static-lsp is missing.");
final StaticLspConfig.Operation operation = config.getOperation();
checkArgument(ImposeAndForward.equals(operation),
"Only impose-and-forward operation is supported, but %s given.", operation);
return config;
}
private void imposeAndForward(@Nonnull final InstanceIdentifier<StaticLsp> id, @Nonnull final Config lspConfig,
@Nonnull final WriteContext writeContext, final boolean isAdd)
throws WriteFailedException {
final IpAddDelRoute request = new IpAddDelRoute();
request.isAdd = booleanToByte(isAdd);
request.nextHopWeight = 1; // default value used in make test
final InSegment inSegment = lspConfig.getInSegment();
checkArgument(inSegment != null, "Configuring impose-and-forward, but in-segment is missing.");
checkArgument(inSegment.getType() instanceof IpPrefix, "Only ip-prefix type is supported, but %s given.",
inSegment.getType());
final Ipv4Prefix prefix = ((IpPrefix) inSegment.getType()).getIpPrefix().getIpv4Prefix();
// TODO(HC2VPP-264): add support for mpls + v6
request.dstAddressLength = extractPrefix(prefix);
request.dstAddress = ipv4AddressPrefixToArray(prefix);
final OutSegment outSegment = lspConfig.getOutSegment();
checkArgument(outSegment != null, "Configuring impose-and-forward, but out-segment is missing.");
translateOutSegment(outSegment, request, writeContext.getMappingContext());
getReplyForWrite(getFutureJVpp().ipAddDelRoute(request).toCompletableFuture(), id);
}
private void translateOutSegment(@Nonnull final OutSegment outSegment, @Nonnull final IpAddDelRoute request,
@Nonnull final MappingContext mappingContext) {
String outgoingInterface = null;
if (outSegment instanceof SimplePath) {
final SimplePath path = (SimplePath) outSegment;
outgoingInterface = path.getOutgoingInterface();
final IpAddress nextHop = path.getNextHop();
checkArgument(nextHop != null, "Configuring impose-and-forward, but next-hop is missing.");
// TODO(HC2VPP-264): add support for mpls + v6
checkArgument(nextHop.getIpv4Address() != null, "Only IPv4 next-hop address is supported.");
request.nextHopAddress = ipv4AddressNoZoneToArray(nextHop.getIpv4Address().getValue());
request.nextHopNOutLabels = 1;
checkArgument(path.getOutgoingLabel() != null,
"Configuring impose-and-forward, but outgoing-label is missing.");
request.nextHopOutLabelStack = new int[] {path.getOutgoingLabel().getValue().intValue()};
} else if (outSegment instanceof PathList) {
final PathList pathList = (PathList) outSegment;
checkArgument(pathList.getPaths() != null && pathList.getPaths().size() == 1,
"Only single path is supported");
final Paths paths = pathList.getPaths().get(0);
outgoingInterface = paths.getOutgoingInterface();
// TODO(HC2VPP-264): add support for mpls + v6
final IpAddress nextHop = paths.getNextHop();
checkArgument(nextHop != null, "Configuring impose-and-forward, but next-hop is missing.");
checkArgument(nextHop.getIpv4Address() != null, "Only IPv4 next-hop address is supported.");
request.nextHopAddress = ipv4AddressNoZoneToArray(nextHop.getIpv4Address().getValue());
final List<MplsLabel> outgoingLabels = paths.getOutgoingLabels();
final int numberOfLabels = outgoingLabels.size();
checkArgument(numberOfLabels > 0 && numberOfLabels < MAX_LABELS,
"Number of labels (%s) not in range (0, %s].", numberOfLabels, MAX_LABELS, numberOfLabels);
request.nextHopNOutLabels = (byte) numberOfLabels;
request.nextHopOutLabelStack =
outgoingLabels.stream().mapToInt(label -> label.getValue().intValue()).toArray();
} else {
throw new IllegalArgumentException("Unsupported out-segment type: " + outSegment);
}
checkArgument(outgoingInterface != null, "Configuring impose-and-forward, but outgoing-interface is missing.");
request.nextHopSwIfIndex = interfaceContext.getIndex(outgoingInterface, mappingContext);
request.nextHopViaLabel = MPLS_LABEL_INVALID;
}
}
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