renderers/ofoverlay/src/main/java/org/opendaylight/groupbasedpolicy/renderer/ofoverlay/flow/EgressNatMapper.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others. 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.groupbasedpolicy.renderer.ofoverlay.flow;
  10
  11 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.addNxRegMatch;
  12 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.applyActionIns;
  13 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.ethernetMatch;
  14 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.gotoTableIns;
  15 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.instructions;
  16 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.setIpv4SrcAction;
  17 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.setIpv6SrcAction;
  18
  19 import java.util.Collection;
  20 import java.util.List;
  21
  22 import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.OfContext;
  23 import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.OfWriter;
  24 import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.RegMatch;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
  26 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Prefix;
  27 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv6Prefix;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.Action;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowId;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.Flow;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.FlowBuilder;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.flow.MatchBuilder;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.L3ContextId;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.TenantId;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.EndpointL3;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.ofoverlay.rev140528.napt.translations.fields.napt.translations.NaptTranslation;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.Layer3Match;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.layer._3.match.Ipv4MatchBuilder;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.layer._3.match.Ipv6MatchBuilder;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg6;
  42 import org.slf4j.Logger;
  43 import org.slf4j.LoggerFactory;
  44
  45 /**
  46  * Manage the table that assigns source endpoint group, bridge domain, and
  47  * router domain to registers to be used by other tables.
  48  */
  49 public class EgressNatMapper extends FlowTable {
  50
  51     protected static final Logger LOG = LoggerFactory.getLogger(EgressNatMapper.class);
  52
  53     // TODO Li alagalah Improve UT coverage for this class.
  54     public static short TABLE_ID;
  55
  56     public EgressNatMapper(OfContext ctx, short tableId) {
  57         super(ctx);
  58         TABLE_ID=tableId;
  59     }
  60
  61     @Override
  62     public short getTableId() {
  63         return TABLE_ID;
  64     }
  65
  66     @Override
  67     public void sync(NodeId nodeId, OfWriter ofWriter) throws Exception {
  68         ofWriter.writeFlow(nodeId, TABLE_ID, dropFlow(Integer.valueOf(1), null, TABLE_ID));
  69
  70         Collection<EndpointL3> l3Endpoints = ctx.getEndpointManager().getL3EndpointsWithNat();
  71         for (EndpointL3 l3Ep : l3Endpoints) {
  72             Flow flow = addNatFlow(l3Ep);
  73             if (flow==null) {
  74                 continue;
  75             }
  76             ofWriter.writeFlow(nodeId, TABLE_ID, flow);
  77         }
  78     }
  79
  80     private Flow addNatFlow(EndpointL3 l3Ep) throws Exception {
  81         List<NaptTranslation> naptAugL3Endpoint = ctx.getEndpointManager().getNaptAugL3Endpoint(l3Ep);
  82         //Match on L3 Nat Augmentation in Destination, set to IPAddress/Mac, send to SourceMapper
  83         Flow flow = null;
  84         for (NaptTranslation nat:naptAugL3Endpoint) {
  85             flow = buildNatFlow(l3Ep.getIpAddress(),nat.getIpAddress(),l3Ep.getTenant(), l3Ep.getL3Context());
  86             break;
  87         }
  88
  89         return flow;
  90     }
  91
  92     private Flow buildNatFlow(IpAddress insideAddress, IpAddress outsideAddress, TenantId tenantId, L3ContextId l3Ctx) throws Exception {
  93         MatchBuilder mb = new MatchBuilder();
  94         Action setSrcIp;
  95         String insideIpMatch;
  96         Layer3Match m;
  97
  98         FlowId flowid = new FlowId(new StringBuilder().append("EgressNat")
  99             .append("|")
 100             .append(insideAddress)
 101             .append("|")
 102             .append(outsideAddress)
 103             .toString());
 104         if (outsideAddress.getIpv4Address() != null) {
 105             setSrcIp = setIpv4SrcAction(outsideAddress.getIpv4Address());
 106
 107             insideIpMatch = insideAddress.getIpv4Address().getValue() + "/32";
 108             m = new Ipv4MatchBuilder().setIpv4Source(new Ipv4Prefix(insideIpMatch)).build();
 109             mb.setEthernetMatch(ethernetMatch(null, null, FlowUtils.IPv4)).setLayer3Match(m);
 110         } else if (outsideAddress.getIpv6Address() != null) {
 111             setSrcIp = setIpv6SrcAction(outsideAddress.getIpv6Address());
 112             insideIpMatch = insideAddress.getIpv6Address().getValue() + "/128";
 113             m = new Ipv6MatchBuilder().setIpv6Source(new Ipv6Prefix(insideIpMatch)).build();
 114             mb.setEthernetMatch(ethernetMatch(null, null, FlowUtils.IPv6)).setLayer3Match(m);
 115         } else {
 116             return null;
 117         }
 118
 119         addNxRegMatch(mb, RegMatch.of(NxmNxReg6.class, Long.valueOf(OrdinalFactory.getContextOrdinal(tenantId, l3Ctx))));
 120
 121         FlowBuilder flowb = base().setPriority(Integer.valueOf(100))
 122             .setId(flowid)
 123             .setMatch(mb.build())
 124             .setInstructions(
 125                     instructions(applyActionIns(setSrcIp), gotoTableIns(ctx.getPolicyManager().getTABLEID_EXTERNAL_MAPPER())));
 126         return flowb.build();
 127     }
 128 }