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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 io.fd.hc2vpp.common.translate.util.Ipv4Translator;
import io.fd.hc2vpp.common.translate.util.MplsLabelTranslator;
import io.fd.hc2vpp.common.translate.util.NamingContext;
import io.fd.honeycomb.translate.MappingContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import io.fd.vpp.jvpp.core.dto.IpAddDelRoute;
import io.fd.vpp.jvpp.core.future.FutureJVppCore;
import io.fd.vpp.jvpp.core.types.FibMplsLabel;
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.Ipv4Address;
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.rev170702.MplsOperationsType;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170702._static.lsp.paths.OutSegment;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170702._static.lsp.paths.out.segment.MultiplePaths;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170702._static.lsp.paths.out.segment.SimplePath;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170702._static.lsp.paths.out.segment.multiple.paths.Paths;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170702._static.lsp.top.Config;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170702.in.segment.InSegment;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170702.in.segment_config.Type;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170702.in.segment_config.type.IpPrefix;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170702.path.outgoing.labels.outgoing.labels.OutgoingLabels;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170702.routing.mpls._static.lsps.StaticLsp;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev171204.MplsLabel;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
/**
* Translates {@link MplsOperationsType#ImposeAndForward ImposeAndForward} operation to ip_add_del_route API.
*
* @see <a href="https://git.fd.io/vpp/tree/src/vnet/ip/ip.api">ip_add_del_route</a> definition
*/
final class ImposeAndForwardWriter implements LspWriter, Ipv4Translator, MplsLabelReader, MplsLabelTranslator {
private final FutureJVppCore vppApi;
private final NamingContext interfaceContext;
ImposeAndForwardWriter(@Nonnull final FutureJVppCore vppApi, @Nonnull final NamingContext interfaceContext) {
this.vppApi = vppApi;
this.interfaceContext = interfaceContext;
}
@Override
public void write(@Nonnull final InstanceIdentifier<StaticLsp> id, @Nonnull final StaticLsp data,
@Nonnull final MappingContext ctx, final boolean isAdd) throws WriteFailedException {
final Config config = data.getConfig();
final IpAddDelRoute request = new IpAddDelRoute();
request.isAdd = booleanToByte(isAdd);
translate(config.getInSegment(), request);
translate(data.getOutSegment(), request, ctx);
// default values based on inspecting VPP's CLI and make test code
request.nextHopWeight = 1;
request.nextHopViaLabel = MPLS_LABEL_INVALID;
getReplyForWrite(vppApi.ipAddDelRoute(request).toCompletableFuture(), id);
}
private void translate(@Nonnull final InSegment inSegment, @Nonnull final IpAddDelRoute request) {
checkArgument(inSegment.getConfig() != null,
"Configuring impose-and-forward, but in-segment config is missing.");
final Type type = inSegment.getConfig().getType();
checkArgument(type instanceof IpPrefix, "Only ip-prefix type is supported, but %s given.", type);
// TODO(HC2VPP-264): add support for mpls + v6
final Ipv4Prefix prefix = ((IpPrefix) type).getIpPrefix().getIpv4Prefix();
request.dstAddressLength = extractPrefix(prefix);
request.dstAddress = ipv4AddressPrefixToArray(prefix);
}
private void translate(@Nonnull final OutSegment outSegment, @Nonnull final IpAddDelRoute request,
@Nonnull final MappingContext ctx) {
checkArgument(outSegment != null, "Configuring impose-and-forward, but out-segment is missing.");
final String outgoingInterface;
if (outSegment instanceof SimplePath) {
outgoingInterface = translate((SimplePath) outSegment, request);
} else if (outSegment instanceof MultiplePaths) {
outgoingInterface = translate((MultiplePaths) outSegment, request);
} 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, ctx);
}
private String translate(@Nonnull final SimplePath path, @Nonnull final IpAddDelRoute request) {
final IpAddress nextHop = path.getSimplePath().getConfig().getNextHop();
// TODO(HC2VPP-264): add support for mpls + v6
if (nextHop != null) {
final Ipv4Address address = nextHop.getIpv4Address();
checkArgument(address != null, "Only IPv4 next-hop address is supported.");
request.nextHopAddress = ipv4AddressNoZoneToArray(address.getValue());
} else {
request.nextHopAddress = new byte[0];
}
final MplsLabel outgoingLabel = path.getSimplePath().getConfig().getOutgoingLabel();
checkArgument(outgoingLabel != null, "Configuring impose-and-forward, but outgoing-label is missing.");
request.nextHopOutLabelStack = new FibMplsLabel[] {translate(getLabelValue(outgoingLabel))};
request.nextHopNOutLabels = 1;
return path.getSimplePath().getConfig().getOutgoingInterface();
}
private String translate(@Nonnull final MultiplePaths pathList, @Nonnull final IpAddDelRoute request) {
checkArgument(pathList.getPaths() != null && pathList.getPaths().getPath().size() == 1,
"Only single path is supported");
final Paths paths = pathList.getPaths();
final IpAddress nextHop = paths.getPath().get(0).getConfig().getNextHop();
// TODO(HC2VPP-264): add support for mpls + v6
if (nextHop != null) {
final Ipv4Address address = nextHop.getIpv4Address();
checkArgument(address != null, "Only IPv4 next-hop address is supported.");
request.nextHopAddress = ipv4AddressNoZoneToArray(address.getValue());
} else {
request.nextHopAddress = new byte[0];
}
final List<OutgoingLabels> labels = paths.getOutgoingLabels().getOutgoingLabels();
final int numberOfLabels = labels.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 = labels.stream()
.map(label -> translate(getLabelValue(label.getConfig().getLabel())))
.toArray(FibMplsLabel[]::new);
return paths.getPath().get(0).getConfig().getOutgoingInterface();
}
}
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