BGPCEP-589: BGP Neighbor match

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

diff --git a/bgp/openconfig-rp-statement/src/main/java/org/opendaylight/protocol/bgp/openconfig/routing/policy/statement/conditions/MatchBgpNeighborSetHandler.java b/bgp/openconfig-rp-statement/src/main/java/org/opendaylight/protocol/bgp/openconfig/routing/policy/statement/conditions/MatchBgpNeighborSetHandler.java
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+++ b/bgp/openconfig-rp-statement/src/main/java/org/opendaylight/protocol/bgp/openconfig/routing/policy/statement/conditions/MatchBgpNeighborSetHandler.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.protocol.bgp.openconfig.routing.policy.statement.conditions;
+
+import static java.util.Objects.requireNonNull;
+
+import com.google.common.base.Optional;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+import java.util.stream.Collectors;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.apache.commons.lang3.StringUtils;
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.RouteEntryBaseAttributes;
+import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.policy.condition.BgpConditionsAugmentationPolicy;
+import org.opendaylight.protocol.bgp.rib.spi.RouterIds;
+import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRouteEntryExportParameters;
+import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRouteEntryImportParameters;
+import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.policy.types.rev151009.MatchSetOptionsRestrictedType;
+import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.generic.defined.sets.NeighborSets;
+import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.neighbor.set.NeighborSet;
+import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.neighbor.set.NeighborSetKey;
+import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.routing.policy.top.RoutingPolicy;
+import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.routing.policy.top.routing.policy.DefinedSets;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.path.attributes.Attributes;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.PeerId;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.odl.bgp._default.policy.rev180109.BgpNeighbor;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.odl.bgp._default.policy.rev180109.MatchBgpNeighborCondition;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.odl.bgp._default.policy.rev180109.match.bgp.neighbor.grouping.MatchBgpNeighborSet;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Match a set of Neighbors(ip address) (ANY, INVERT).
+ */
+public final class MatchBgpNeighborSetHandler
+        implements BgpConditionsAugmentationPolicy<MatchBgpNeighborCondition, Void> {
+    private static final InstanceIdentifier<NeighborSets> NEIGHBOR_SET_IID
+            = InstanceIdentifier.create(RoutingPolicy.class)
+            .child(DefinedSets.class)
+            .child(NeighborSets.class);
+    private final DataBroker dataBroker;
+    private final LoadingCache<String, List<PeerId>> peerSets = CacheBuilder.newBuilder()
+            .build(new CacheLoader<String, List<PeerId>>() {
+                @Override
+                public List<PeerId> load(final String key) throws ExecutionException, InterruptedException {
+                    return loadRoleSets(key);
+                }
+            });
+
+    public MatchBgpNeighborSetHandler(final DataBroker dataBroker) {
+        this.dataBroker = requireNonNull(dataBroker);
+    }
+
+    private List<PeerId> loadRoleSets(final String key) throws ExecutionException, InterruptedException {
+        final ReadOnlyTransaction tr = this.dataBroker.newReadOnlyTransaction();
+        final Optional<NeighborSet> result = tr.read(LogicalDatastoreType.CONFIGURATION,
+                NEIGHBOR_SET_IID.child(NeighborSet.class, new NeighborSetKey(key))).get();
+        if (!result.isPresent()) {
+            return Collections.emptyList();
+        }
+        return result.get().getNeighbor().stream()
+                .map(nei -> RouterIds.createPeerId(nei.getAddress()))
+                .collect(Collectors.toList());
+    }
+
+    @Override
+    public boolean matchImportCondition(
+            final RouteEntryBaseAttributes routeEntryInfo,
+            final BGPRouteEntryImportParameters importParameters,
+            final Void nonAttributres,
+            final MatchBgpNeighborCondition conditions) {
+        return matchBgpNeighborSetCondition(importParameters.getFromPeerId(), null,
+                conditions.getMatchBgpNeighborSet());
+    }
+
+    @Override
+    public boolean matchExportCondition(
+            final RouteEntryBaseAttributes routeEntryInfo,
+            final BGPRouteEntryExportParameters exportParameters,
+            final Void nonAttributres,
+            final MatchBgpNeighborCondition conditions) {
+        return matchBgpNeighborSetCondition(exportParameters.getFromPeerId(), exportParameters.getToPeerId(),
+                conditions.getMatchBgpNeighborSet());
+    }
+
+    private boolean matchBgpNeighborSetCondition(
+            @Nonnull final PeerId fromPeerId,
+            @Nullable final PeerId toPeerId,
+            final MatchBgpNeighborSet matchBgpNeighborSet) {
+
+        final BgpNeighbor from = matchBgpNeighborSet.getFromNeighbor();
+        Boolean match = null;
+        if (from != null) {
+            match = checkMatch(from.getNeighborSet(), fromPeerId, from.getMatchSetOptions());
+        }
+
+        if (match != null && !match) {
+            return false;
+        }
+
+        final BgpNeighbor to = matchBgpNeighborSet.getToNeighbor();
+        if (to != null) {
+            match = checkMatch(to.getNeighborSet(), toPeerId, to.getMatchSetOptions());
+        }
+
+        return match;
+    }
+
+    private boolean checkMatch(
+            final String neighborSetName,
+            final PeerId peerId,
+            final MatchSetOptionsRestrictedType matchSetOptions) {
+        final List<PeerId> roles = this.peerSets.getUnchecked(StringUtils
+                .substringBetween(neighborSetName, "=\"", "\""));
+
+        final boolean found = roles.contains(peerId);
+        if (MatchSetOptionsRestrictedType.ANY.equals(matchSetOptions)) {
+            return found;
+        }
+        //INVERT
+        return !found;
+    }
+
+    @Override
+    public Void getConditionParameter(final Attributes attributes) {
+        return null;
+    }
+}