renderers/ofoverlay/src/main/java/org/opendaylight/groupbasedpolicy/renderer/ofoverlay/mapper/egressnat/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.mapper.egressnat;
  10
  11 import org.opendaylight.groupbasedpolicy.dto.EpKey;
  12 import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.OfContext;
  13 import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.OfWriter;
  14 import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowTable;
  15 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev100924.MacAddress;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.instruction.go.to.table._case.GoToTable;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.L2BridgeDomainId;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.Endpoint;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.EndpointKey;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.EndpointL3;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg6;
  23
  24 import java.util.Collection;
  25
  26 /**
  27  * <h1>Manage the table that assigns source endpoint group, bridge domain, and
  28  * router domain to registers to be used by other tables</h1>
  29  *
  30  * <i>NAT flow</i><br>
  31  * Priority = 100<br>
  32  * Matches:<br>
  33  *      - ipv4/ipv6 inside address<br>
  34  *      - ethernet type<br>
  35  *      - Reg6 {@link NxmNxReg6}<br>
  36  * Actions:<br>
  37  *      - set_src ip address<br>
  38  *      - {@link GoToTable} EXTERNAL MAPPER table<br>
  39  */
  40 public class EgressNatMapper extends FlowTable {
  41     // Priorities
  42     private static final Integer DROP = 1;
  43     private static final Integer NAT = 100;
  44     private final short tableId;
  45
  46     public EgressNatMapper(OfContext ctx, short tableId) {
  47         super(ctx);
  48         this.tableId = tableId;
  49     }
  50
  51     @Override
  52     public short getTableId() {
  53         return tableId;
  54     }
  55
  56     @Override
  57     public void sync(Endpoint endpoint, OfWriter ofWriter) throws Exception {
  58         NodeId endpointNodeId = ctx.getEndpointManager().getEndpointNodeId(endpoint);
  59         if (endpointNodeId == null) {
  60             LOG.warn("Endpoint {} has no location specified, skipped", endpoint);
  61             return;
  62         }
  63         syncFlows(new EgressNatMapperFlows(endpointNodeId, tableId), endpoint, ofWriter);
  64     }
  65
  66     void syncFlows(EgressNatMapperFlows flows, Endpoint endpoint, OfWriter ofWriter) {
  67
  68         // Drop
  69         flows.dropFlow(DROP, null, ofWriter);
  70
  71         // NAT flows
  72         short externalMapperId = ctx.getPolicyManager().getTABLEID_EXTERNAL_MAPPER();
  73         Collection<EndpointL3> l3Endpoints = ctx.getEndpointManager().getL3EndpointsWithNat();
  74         EndpointKey endpointKey = endpoint.getKey();
  75         for (EndpointL3 l3Endpoint : l3Endpoints) {
  76             L2BridgeDomainId l2Context = l3Endpoint.getL2Context();
  77             MacAddress macAddress = l3Endpoint.getMacAddress();
  78             if (l2Context != null && macAddress != null) {
  79                 Endpoint l2EpFromL3Ep = ctx.getEndpointManager().getEndpoint(new EpKey(l2Context, macAddress));
  80                 if(endpointKey.equals(l2EpFromL3Ep.getKey())) {
  81                     flows.natFlows(externalMapperId, l3Endpoint, NAT, ofWriter);
  82                     // L3 Endpoint found, end of loop
  83                     break;
  84                 }
  85             }
  86         }
  87     }
  88 }