bgp/openconfig-rp-statement/src/main/java/org/opendaylight/protocol/bgp/openconfig/routing/policy/statement/conditions/VpnNonMemberHandler.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 java.util.Collections;
  12 import java.util.List;
  13 import java.util.stream.Collectors;
  14 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.RouteEntryBaseAttributes;
  15 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.policy.condition.BgpConditionsAugmentationPolicy;
  16 import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRouteEntryExportParameters;
  17 import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRouteEntryImportParameters;
  18 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.types.rev151009.AfiSafiType;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.Attributes;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.ExtendedCommunities;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.RouteTarget;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.extended.community.ExtendedCommunity;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.extended.community.extended.community.As4RouteTargetExtendedCommunityCase;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.extended.community.extended.community.RouteTargetExtendedCommunityCase;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.extended.community.extended.community.RouteTargetIpv4Case;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.route.target.constrain._default.route.grouping.RouteTargetConstrainDefaultRoute;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.route.target.constrain._default.route.grouping.RouteTargetConstrainDefaultRouteBuilder;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.odl.bgp._default.policy.rev180329.VpnNonMemberCondition;
  29
  30 /**
  31  * Returns true if Route Target extended communities attributes are not part of the VPN membership of destiny peer.
  32  *
  33  * @author Claudio D. Gasparini
  34  */
  35 public final class VpnNonMemberHandler implements
  36         BgpConditionsAugmentationPolicy<VpnNonMemberCondition, List<ExtendedCommunities>> {
  37     private static final VpnNonMemberHandler INSTANCE = new VpnNonMemberHandler();
  38     private static final RouteTargetConstrainDefaultRoute DEFAULT = new RouteTargetConstrainDefaultRouteBuilder()
  39             .build();
  40
  41     private VpnNonMemberHandler() {
  42
  43     }
  44
  45     public static VpnNonMemberHandler getInstance() {
  46         return INSTANCE;
  47     }
  48
  49     @Override
  50     public boolean matchImportCondition(
  51             final Class<? extends AfiSafiType> afiSafiType,
  52             final RouteEntryBaseAttributes routeEntryInfo,
  53             final BGPRouteEntryImportParameters routeEntryImportParameters,
  54             final List<ExtendedCommunities> attributes,
  55             final VpnNonMemberCondition conditions) {
  56         return false;
  57     }
  58
  59     @Override
  60     public boolean matchExportCondition(
  61             final Class<? extends AfiSafiType> afiSafiType,
  62             final RouteEntryBaseAttributes routeEntryInfo,
  63             final BGPRouteEntryExportParameters routeEntryExportParameters,
  64             final List<ExtendedCommunities> attributes,
  65             final VpnNonMemberCondition conditions) {
  66         final List<RouteTarget> allowedRouteTarget = routeEntryExportParameters.getMemberships();
  67         if (allowedRouteTarget.contains(DEFAULT)) {
  68             return false;
  69         }
  70         final List<RouteTarget> toRT = attributes.stream()
  71                 .map(ext -> ext.getExtendedCommunity())
  72                 .filter(this::filterRTExtComm)
  73                 .map(this::extendedCommunityToRouteTarget)
  74                 .collect(Collectors.toList());
  75         return Collections.disjoint(allowedRouteTarget, toRT);
  76     }
  77
  78     private RouteTarget extendedCommunityToRouteTarget(final ExtendedCommunity rt) {
  79         if (rt instanceof RouteTargetExtendedCommunityCase) {
  80             return ((RouteTargetExtendedCommunityCase) rt).getRouteTargetExtendedCommunity();
  81         } else if (rt instanceof As4RouteTargetExtendedCommunityCase) {
  82             return ((As4RouteTargetExtendedCommunityCase) rt).getAs4RouteTargetExtendedCommunity();
  83         }
  84         return ((RouteTargetIpv4Case) rt).getRouteTargetIpv4();
  85     }
  86
  87     private boolean filterRTExtComm(final ExtendedCommunity rt) {
  88         return rt instanceof RouteTargetExtendedCommunityCase || rt instanceof As4RouteTargetExtendedCommunityCase
  89                 || rt instanceof RouteTargetIpv4Case;
  90     }
  91
  92     @Override
  93     public List<ExtendedCommunities> getConditionParameter(final Attributes attributes) {
  94         return attributes.getExtendedCommunities();
  95     }
  96 }