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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.honeycomb.translate.MappingContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import io.fd.vpp.jvpp.core.dto.MplsRouteAddDel;
import io.fd.vpp.jvpp.core.future.FutureJVppCore;
import javax.annotation.Nonnull;
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.in.segment.type.MplsLabel;
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.opendaylight.params.xml.ns.yang.vpp.mpls.rev171120.LookupType;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.mpls.rev171120.StaticLspVppLookupAugmentation;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
/**
* Translates {@link StaticLspConfig.Operation#PopAndLookup} operation with {@link LookupType#Mpls} to
* mpls_route_add_del API.
*
* @see <a href="https://git.fd.io/vpp/tree/src/vnet/mpls/mpls.api">mpls_route_add_del</a> definition
*/
final class MplsLookupWriter implements LspWriter {
private static final byte MPLS_PROTOCOL = (byte) LookupType.Mpls.getIntValue();
private final FutureJVppCore vppApi;
MplsLookupWriter(@Nonnull final FutureJVppCore vppApi) {
this.vppApi = vppApi;
}
@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 MplsRouteAddDel request = new MplsRouteAddDel();
request.mrIsAdd = booleanToByte(isAdd);
translate(request, config);
translate(request, config.getAugmentation(StaticLspVppLookupAugmentation.class));
// default values based on inspecting VPP's CLI and make test code
request.mrClassifyTableIndex = -1;
request.mrNextHopProto = MPLS_PROTOCOL;
request.mrNextHopWeight = 1;
request.mrNextHop = new byte[0]; // no next hop since we POP
request.mrNextHopOutLabelStack = new int[0]; // no new labels
request.mrNextHopSwIfIndex = -1;
request.mrNextHopViaLabel = MPLS_LABEL_INVALID;
getReplyForWrite(vppApi.mplsRouteAddDel(request).toCompletableFuture(), id);
}
private void translate(@Nonnull final MplsRouteAddDel request, @Nonnull final Config config) {
final InSegment inSegment = config.getInSegment();
checkArgument(inSegment != null, "Configuring mpls pop-and-lookup, but in-segment is missing.");
checkArgument(inSegment.getType() instanceof MplsLabel, "Expecting mpls-label in-segment type, but %s given.",
inSegment.getType());
final Long label = ((MplsLabel) inSegment.getType()).getIncomingLabel().getValue();
request.mrLabel = label.intValue();
}
private void translate(@Nonnull final MplsRouteAddDel request,
@Nonnull final StaticLspVppLookupAugmentation vppLabelLookup) {
// MPLS lookup for the last label is not valid operation (there is no next label to lookup),
// so match only labels without EOS bit set:
request.mrEos = 0;
final Long mplsLookupInTable = vppLabelLookup.getLabelLookup().getMplsLookupInTable();
checkArgument(mplsLookupInTable != null,
"Configuring pop and mpls lookup, but MPLS lookup table was not given");
request.mrNextHopTableId = mplsLookupInTable.intValue();
}
}
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