bgp/openconfig-rp-statement/src/main/java/org/opendaylight/protocol/bgp/openconfig/routing/policy/statement/conditions/MatchBgpNeighborSetHandler.java

   1 /*
   2  * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.protocol.bgp.openconfig.routing.policy.statement.conditions;
  10
  11 import static java.util.Objects.requireNonNull;
  12
  13 import com.google.common.base.Optional;
  14 import com.google.common.cache.CacheBuilder;
  15 import com.google.common.cache.CacheLoader;
  16 import com.google.common.cache.LoadingCache;
  17 import java.util.Collections;
  18 import java.util.List;
  19 import java.util.concurrent.ExecutionException;
  20 import java.util.stream.Collectors;
  21 import javax.annotation.Nonnull;
  22 import javax.annotation.Nullable;
  23 import org.apache.commons.lang3.StringUtils;
  24 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  25 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  26 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  27 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.RouteEntryBaseAttributes;
  28 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.policy.condition.BgpConditionsAugmentationPolicy;
  29 import org.opendaylight.protocol.bgp.rib.spi.RouterIds;
  30 import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRouteEntryExportParameters;
  31 import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRouteEntryImportParameters;
  32 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.policy.types.rev151009.MatchSetOptionsRestrictedType;
  33 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.generic.defined.sets.NeighborSets;
  34 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.neighbor.set.NeighborSet;
  35 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.neighbor.set.NeighborSetKey;
  36 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.routing.policy.top.RoutingPolicy;
  37 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.routing.policy.top.routing.policy.DefinedSets;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.path.attributes.Attributes;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.PeerId;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.odl.bgp._default.policy.rev180109.BgpNeighbor;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.odl.bgp._default.policy.rev180109.MatchBgpNeighborCondition;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.odl.bgp._default.policy.rev180109.match.bgp.neighbor.grouping.MatchBgpNeighborSet;
  43 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  44
  45 /**
  46  * Match a set of Neighbors(ip address) (ANY, INVERT).
  47  */
  48 public final class MatchBgpNeighborSetHandler
  49         implements BgpConditionsAugmentationPolicy<MatchBgpNeighborCondition, Void> {
  50     private static final InstanceIdentifier<NeighborSets> NEIGHBOR_SET_IID
  51             = InstanceIdentifier.create(RoutingPolicy.class)
  52             .child(DefinedSets.class)
  53             .child(NeighborSets.class);
  54     private final DataBroker dataBroker;
  55     private final LoadingCache<String, List<PeerId>> peerSets = CacheBuilder.newBuilder()
  56             .build(new CacheLoader<String, List<PeerId>>() {
  57                 @Override
  58                 public List<PeerId> load(final String key) throws ExecutionException, InterruptedException {
  59                     return loadRoleSets(key);
  60                 }
  61             });
  62
  63     public MatchBgpNeighborSetHandler(final DataBroker dataBroker) {
  64         this.dataBroker = requireNonNull(dataBroker);
  65     }
  66
  67     private List<PeerId> loadRoleSets(final String key) throws ExecutionException, InterruptedException {
  68         final ReadOnlyTransaction tr = this.dataBroker.newReadOnlyTransaction();
  69         final Optional<NeighborSet> result = tr.read(LogicalDatastoreType.CONFIGURATION,
  70                 NEIGHBOR_SET_IID.child(NeighborSet.class, new NeighborSetKey(key))).get();
  71         if (!result.isPresent()) {
  72             return Collections.emptyList();
  73         }
  74         return result.get().getNeighbor().stream()
  75                 .map(nei -> RouterIds.createPeerId(nei.getAddress()))
  76                 .collect(Collectors.toList());
  77     }
  78
  79     @Override
  80     public boolean matchImportCondition(
  81             final RouteEntryBaseAttributes routeEntryInfo,
  82             final BGPRouteEntryImportParameters importParameters,
  83             final Void nonAttributres,
  84             final MatchBgpNeighborCondition conditions) {
  85         return matchBgpNeighborSetCondition(importParameters.getFromPeerId(), null,
  86                 conditions.getMatchBgpNeighborSet());
  87     }
  88
  89     @Override
  90     public boolean matchExportCondition(
  91             final RouteEntryBaseAttributes routeEntryInfo,
  92             final BGPRouteEntryExportParameters exportParameters,
  93             final Void nonAttributres,
  94             final MatchBgpNeighborCondition conditions) {
  95         return matchBgpNeighborSetCondition(exportParameters.getFromPeerId(), exportParameters.getToPeerId(),
  96                 conditions.getMatchBgpNeighborSet());
  97     }
  98
  99     private boolean matchBgpNeighborSetCondition(
 100             @Nonnull final PeerId fromPeerId,
 101             @Nullable final PeerId toPeerId,
 102             final MatchBgpNeighborSet matchBgpNeighborSet) {
 103
 104         final BgpNeighbor from = matchBgpNeighborSet.getFromNeighbor();
 105         Boolean match = null;
 106         if (from != null) {
 107             match = checkMatch(from.getNeighborSet(), fromPeerId, from.getMatchSetOptions());
 108         }
 109
 110         if (match != null && !match) {
 111             return false;
 112         }
 113
 114         final BgpNeighbor to = matchBgpNeighborSet.getToNeighbor();
 115         if (to != null) {
 116             match = checkMatch(to.getNeighborSet(), toPeerId, to.getMatchSetOptions());
 117         }
 118
 119         return match;
 120     }
 121
 122     private boolean checkMatch(
 123             final String neighborSetName,
 124             final PeerId peerId,
 125             final MatchSetOptionsRestrictedType matchSetOptions) {
 126         final List<PeerId> roles = this.peerSets.getUnchecked(StringUtils
 127                 .substringBetween(neighborSetName, "=\"", "\""));
 128
 129         final boolean found = roles.contains(peerId);
 130         if (MatchSetOptionsRestrictedType.ANY.equals(matchSetOptions)) {
 131             return found;
 132         }
 133         //INVERT
 134         return !found;
 135     }
 136
 137     @Override
 138     public Void getConditionParameter(final Attributes attributes) {
 139         return null;
 140     }
 141 }