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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.bgp.prefix.sid;
import static com.google.common.base.Preconditions.checkNotNull;
import com.sun.istack.internal.Nullable;
import io.fd.hc2vpp.common.translate.util.JvppReplyConsumer;
import io.fd.honeycomb.translate.bgp.RouteWriter;
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.opendaylight.params.xml.ns.yang.bgp.labeled.unicast.rev150525.labeled.unicast.routes.LabeledUnicastRoutes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.labeled.unicast.rev150525.labeled.unicast.routes.list.LabeledUnicastRoute;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.BgpRib;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.Rib;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.LocRib;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.Tables;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Programs VPP according to draft-ietf-idr-bgp-prefix-sid.
*
* @see <a href="https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-07#section-4.1">Receiving BGP-Prefix-SID
* attribute</a>
*/
final class BgpPrefixSidMplsWriter
implements RouteWriter<LabeledUnicastRoute>, MplsRouteRequestProducer, IpRouteRequestProducer, JvppReplyConsumer {
private static final Logger LOG = LoggerFactory.getLogger(BgpPrefixSidMplsWriter.class);
@SuppressWarnings("unchecked")
private static final InstanceIdentifier<LabeledUnicastRoute> ID =
InstanceIdentifier.create(BgpRib.class).child(Rib.class)
.child(LocRib.class).child(Tables.class).child((Class) LabeledUnicastRoutes.class)
.child(LabeledUnicastRoute.class);
private final FutureJVppCore vppApi;
BgpPrefixSidMplsWriter(@Nonnull final FutureJVppCore vppApi) {
this.vppApi = checkNotNull(vppApi, "vppApi should not be null");
}
@Override
public void create(@Nonnull final InstanceIdentifier<LabeledUnicastRoute> id,
@Nullable final LabeledUnicastRoute route)
throws WriteFailedException.CreateFailedException {
LOG.debug("Translating id={}, route={}", id, route);
// Compute label based on BGP Prefix SID TLVs and add following VPP FIB entries
// (see: https://tools.ietf.org/html/draft-ietf-spring-segment-routing-msdc-08#section-4.2.2):
//
// 1) non-eos VPP MPLS FIB entry (for MPLS packets with derived label in the middle of label stack)
final MplsRouteAddDel mplsRequest = mplsRouteAddDelFor(route, true, LOG);
getReplyForCreate(vppApi.mplsRouteAddDel(mplsRequest).toCompletableFuture(), id, route);
// 2) eos VPP MPLS FIB entry (for MPLS packets with derived label at the end of the label stack)
mplsRequest.mrEos = 1;
getReplyForCreate(vppApi.mplsRouteAddDel(mplsRequest).toCompletableFuture(), id, route);
// 3) VPP IP FIB entry (impose received outbound label on IP packets destined to the BGP prefix)
getReplyForCreate(vppApi.ipAddDelRoute(ipAddDelRouteFor(route, true)).toCompletableFuture(), id, route);
LOG.debug("VPP FIB updated successfully (added id={}).", id);
}
@Override
public void delete(@Nonnull final InstanceIdentifier<LabeledUnicastRoute> id,
@Nullable final LabeledUnicastRoute route)
throws WriteFailedException.DeleteFailedException {
LOG.debug("Removing id={}, route={}", id, route);
// Remove non-eos VPP MPLS FIB entry:
final MplsRouteAddDel mplsRequest = mplsRouteAddDelFor(route, false, LOG);
getReplyForDelete(vppApi.mplsRouteAddDel(mplsRequest).toCompletableFuture(), id);
// Remove eos VPP MPLS FIB entry:
mplsRequest.mrEos = 1;
getReplyForDelete(vppApi.mplsRouteAddDel(mplsRequest).toCompletableFuture(), id);
// Remove VPP IP FIB entry:
getReplyForDelete(vppApi.ipAddDelRoute(ipAddDelRouteFor(route, false)).toCompletableFuture(), id);
LOG.debug("VPP FIB updated successfully (removed id={}).", id);
}
@Override
public void update(@Nonnull final InstanceIdentifier<LabeledUnicastRoute> id,
@Nullable final LabeledUnicastRoute routeBefore,
@Nullable final LabeledUnicastRoute routeAfter)
throws WriteFailedException.UpdateFailedException {
throw new WriteFailedException.UpdateFailedException(id, routeBefore, routeAfter,
new UnsupportedOperationException("Operation not supported"));
}
// TODO(HC2VPP-268): add test which checks if ID is serializable
@Nonnull
@Override
public InstanceIdentifier<LabeledUnicastRoute> getManagedDataObjectType() {
return ID;
}
}
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