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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 io.fd.vpp.jvpp.core.types.FibMplsLabel;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.mpls.rev171120.LookupType;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.mpls.rev171120.StaticLspVppLookupAugmentation;
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.routing.mpls._static.lsps.StaticLsp;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
/**
* Translates {@link StaticLspConfig.Operation#PopAndLookup} operation with {@link LookupType#Ipv4} 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 Ipv4LookupWriter implements LspWriter, MplsInSegmentTranslator {
private static final byte IPV4_PROTOCOL = (byte) LookupType.Ipv4.getIntValue();
private final FutureJVppCore vppApi;
Ipv4LookupWriter(@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(config.getInSegment(), request);
translate(config.augmentation(StaticLspVppLookupAugmentation.class), request);
// default values based on inspecting VPP's CLI and make test code
request.mrClassifyTableIndex = -1;
request.mrNextHopProto = IPV4_PROTOCOL;
request.mrNextHopWeight = 1;
request.mrNextHop = new byte[0]; // no next hop since we POP
request.mrNextHopOutLabelStack = new FibMplsLabel[0]; // no new labels
request.mrNextHopSwIfIndex = -1;
request.mrNextHopViaLabel = MPLS_LABEL_INVALID;
getReplyForWrite(vppApi.mplsRouteAddDel(request).toCompletableFuture(), id);
}
private void translate(@Nonnull final StaticLspVppLookupAugmentation vppLabelLookup,
@Nonnull final MplsRouteAddDel request) {
// IPv4 lookup should only happen if there is no more labels to process, so setting the EOS bit:
request.mrEos = 1;
final Long lookupTable = vppLabelLookup.getLabelLookup().getIp4LookupInTable();
checkArgument(lookupTable != null, "Configuring pop and ipv4 lookup, but ipv4 lookup table was not given");
request.mrNextHopTableId = lookupTable.intValue();
}
}
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