opendaylight/protocol_plugins/openflow/src/main/java/org/opendaylight/controller/protocol_plugin/openflow/internal/PortConverter.java

   1
   2 /*
   3  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   4  *
   5  * This program and the accompanying materials are made available under the
   6  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   7  * and is available at http://www.eclipse.org/legal/epl-v10.html
   8  */
   9
  10 package org.opendaylight.controller.protocol_plugin.openflow.internal;
  11
  12 import org.openflow.protocol.OFPort;
  13
  14 import org.opendaylight.controller.sal.core.Node;
  15 import org.opendaylight.controller.sal.core.NodeConnector;
  16 import org.opendaylight.controller.sal.core.NodeConnector.NodeConnectorIDType;
  17 import org.opendaylight.controller.sal.utils.NetUtils;
  18 import org.opendaylight.controller.sal.utils.NodeConnectorCreator;
  19
  20 /**
  21  * Abstract class which provides the utilities for converting
  22  * the Openflow port number to the equivalent NodeConnector and vice versa
  23  *
  24  *
  25  *
  26  */
  27 public abstract class PortConverter {
  28     private static final int maxOFPhysicalPort =
  29                 NetUtils.getUnsignedShort(OFPort.OFPP_MAX.getValue());
  30
  31     /**
  32      * Converts the Openflow port number to the equivalent NodeConnector.
  33      */
  34     public static NodeConnector toNodeConnector(short ofPort, Node node) {
  35         // Restore original OF unsigned 16 bits value for the comparison
  36         int unsignedOFPort = NetUtils.getUnsignedShort(ofPort);
  37
  38         if (unsignedOFPort > maxOFPhysicalPort) {
  39             if (ofPort == OFPort.OFPP_LOCAL.getValue()) {
  40                 return NodeConnectorCreator.createNodeConnector(
  41                         NodeConnectorIDType.SWSTACK,
  42                         NodeConnector.SPECIALNODECONNECTORID, node);
  43             } else if (ofPort == OFPort.OFPP_NORMAL.getValue()) {
  44                 return NodeConnectorCreator.createNodeConnector(
  45                         NodeConnectorIDType.HWPATH,
  46                         NodeConnector.SPECIALNODECONNECTORID, node);
  47             } else if (ofPort == OFPort.OFPP_CONTROLLER.getValue()) {
  48                 return NodeConnectorCreator.createNodeConnector(
  49                         NodeConnectorIDType.CONTROLLER,
  50                         NodeConnector.SPECIALNODECONNECTORID, node);
  51             }
  52         }
  53         return NodeConnectorCreator.createNodeConnector(ofPort, node);
  54     }
  55
  56     /**
  57      * Converts the NodeConnector to the equivalent Openflow port number
  58      */
  59     public static short toOFPort(NodeConnector salPort) {
  60         if (salPort.getType().equals(NodeConnectorIDType.SWSTACK)) {
  61             return OFPort.OFPP_LOCAL.getValue();
  62         } else if (salPort.getType().equals(
  63                 NodeConnectorIDType.HWPATH)) {
  64             return OFPort.OFPP_NORMAL.getValue();
  65         } else if (salPort.getType().equals(
  66                 NodeConnectorIDType.CONTROLLER)) {
  67             return OFPort.OFPP_CONTROLLER.getValue();
  68         }
  69         return (Short) salPort.getID();
  70     }
  71 }