applications/table-miss-enforcer/src/main/java/org/opendaylight/openflowplugin/applications/tablemissenforcer/LLDPPacketPuntEnforcer.java

   1 /*
   2  * Copyright (c) 2015, 2017 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.openflowplugin.applications.tablemissenforcer;
  10
  11 import java.math.BigInteger;
  12 import java.util.ArrayList;
  13 import java.util.Collection;
  14 import java.util.List;
  15 import java.util.concurrent.Callable;
  16 import javax.annotation.Nonnull;
  17 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  18 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  19 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification.ModificationType;
  20 import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeListener;
  21 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  22 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  23 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  24 import org.opendaylight.openflowplugin.api.OFConstants;
  25 import org.opendaylight.openflowplugin.common.wait.SimpleTaskRetryLooper;
  26 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Uri;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.action.OutputActionCaseBuilder;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.action.output.action._case.OutputActionBuilder;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.list.Action;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.list.ActionBuilder;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.list.ActionKey;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowId;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.Flow;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.FlowBuilder;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.FlowKey;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.AddFlowInputBuilder;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.SalFlowService;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.FlowCookie;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.FlowModFlags;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.OutputPortValues;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.flow.InstructionsBuilder;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.flow.MatchBuilder;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.instruction.ApplyActionsCaseBuilder;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.instruction.apply.actions._case.ApplyActionsBuilder;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.Instruction;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.InstructionBuilder;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.InstructionKey;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeRef;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  52 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  53 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  54
  55 public class LLDPPacketPuntEnforcer implements AutoCloseable, ClusteredDataTreeChangeListener<FlowCapableNode> {
  56     private static final long STARTUP_LOOP_TICK = 500L;
  57     private static final int STARTUP_LOOP_MAX_RETRIES = 8;
  58     private static final short TABLE_ID = (short) 0;
  59     private static final String LLDP_PUNT_WHOLE_PACKET_FLOW = "LLDP_PUNT_WHOLE_PACKET_FLOW";
  60     private static final String DEFAULT_FLOW_ID = "42";
  61     private final SalFlowService flowService;
  62     private final DataBroker dataBroker;
  63     private ListenerRegistration<DataTreeChangeListener> listenerRegistration;
  64
  65     public LLDPPacketPuntEnforcer(SalFlowService flowService, DataBroker dataBroker) {
  66         this.flowService = flowService;
  67         this.dataBroker = dataBroker;
  68     }
  69
  70     @SuppressWarnings("IllegalCatch")
  71     public void start() {
  72         final InstanceIdentifier<FlowCapableNode> path = InstanceIdentifier.create(Nodes.class).child(Node.class)
  73                 .augmentation(FlowCapableNode.class);
  74         final DataTreeIdentifier<FlowCapableNode> identifier = new DataTreeIdentifier(LogicalDatastoreType.OPERATIONAL,
  75                                                                                       path);
  76         SimpleTaskRetryLooper looper = new SimpleTaskRetryLooper(STARTUP_LOOP_TICK, STARTUP_LOOP_MAX_RETRIES);
  77         try {
  78             listenerRegistration = looper
  79                     .loopUntilNoException(new Callable<ListenerRegistration<DataTreeChangeListener>>() {
  80                         @Override
  81                         public ListenerRegistration<DataTreeChangeListener> call() throws Exception {
  82                             return dataBroker.registerDataTreeChangeListener(identifier, LLDPPacketPuntEnforcer.this);
  83                         }
  84                     });
  85         } catch (Exception e) {
  86             throw new IllegalStateException("registerDataTreeChangeListener failed", e);
  87         }
  88     }
  89
  90     @Override
  91     public void close() {
  92         if (listenerRegistration != null) {
  93             listenerRegistration.close();
  94         }
  95     }
  96
  97     @Override
  98     public void onDataTreeChanged(@Nonnull final Collection<DataTreeModification<FlowCapableNode>> modifications) {
  99         for (DataTreeModification modification : modifications) {
 100             if (modification.getRootNode().getModificationType() == ModificationType.WRITE) {
 101                 AddFlowInputBuilder addFlowInput = new AddFlowInputBuilder(createFlow());
 102                 addFlowInput.setNode(
 103                         new NodeRef(modification.getRootPath().getRootIdentifier().firstIdentifierOf(Node.class)));
 104                 this.flowService.addFlow(addFlowInput.build());
 105             }
 106         }
 107     }
 108
 109     static Flow createFlow() {
 110         FlowBuilder flowBuilder = new FlowBuilder();
 111         flowBuilder.setMatch(new MatchBuilder().build());
 112         flowBuilder.setInstructions(createSendToControllerInstructions().build());
 113         flowBuilder.setPriority(0);
 114
 115         FlowKey key = new FlowKey(new FlowId(DEFAULT_FLOW_ID));
 116         flowBuilder.setBarrier(Boolean.FALSE);
 117         flowBuilder.setBufferId(OFConstants.OFP_NO_BUFFER);
 118         BigInteger value = BigInteger.valueOf(10L);
 119         flowBuilder.setCookie(new FlowCookie(value));
 120         flowBuilder.setCookieMask(new FlowCookie(value));
 121         flowBuilder.setHardTimeout(0);
 122         flowBuilder.setIdleTimeout(0);
 123         flowBuilder.setInstallHw(false);
 124         flowBuilder.setStrict(false);
 125         flowBuilder.setContainerName(null);
 126         flowBuilder.setFlags(new FlowModFlags(false, false, false, false, true));
 127         flowBuilder.setId(new FlowId("12"));
 128         flowBuilder.setTableId(TABLE_ID);
 129         flowBuilder.setKey(key);
 130         flowBuilder.setFlowName(LLDP_PUNT_WHOLE_PACKET_FLOW);
 131
 132         return flowBuilder.build();
 133     }
 134
 135     private static InstructionsBuilder createSendToControllerInstructions() {
 136         final List<Action> actionList = new ArrayList<>();
 137         ActionBuilder ab = new ActionBuilder();
 138
 139         OutputActionBuilder output = new OutputActionBuilder();
 140         output.setMaxLength(OFConstants.OFPCML_NO_BUFFER);
 141         Uri value = new Uri(OutputPortValues.CONTROLLER.toString());
 142         output.setOutputNodeConnector(value);
 143         ab.setAction(new OutputActionCaseBuilder().setOutputAction(output.build()).build());
 144         ab.setOrder(0);
 145         ab.setKey(new ActionKey(0));
 146         actionList.add(ab.build());
 147         // Create an Apply Action
 148         ApplyActionsBuilder aab = new ApplyActionsBuilder();
 149         aab.setAction(actionList);
 150
 151         // Wrap our Apply Action in an Instruction
 152         InstructionBuilder ib = new InstructionBuilder();
 153         ib.setInstruction(new ApplyActionsCaseBuilder().setApplyActions(aab.build()).build());
 154         ib.setOrder(0);
 155         ib.setKey(new InstructionKey(0));
 156
 157         // Put our Instruction in a list of Instructions
 158         InstructionsBuilder isb = new InstructionsBuilder();
 159         List<Instruction> instructions = new ArrayList<>();
 160         instructions.add(ib.build());
 161         isb.setInstruction(instructions);
 162         return isb;
 163     }
 164
 165 }