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.NodeConnectorCreator;
  18
  19 /**
  20  * Abstract class which provides the utilities for converting
  21  * the Openflow port number to the equivalent NodeConnector and vice versa
  22  *
  23  *
  24  *
  25  */
  26 public abstract class PortConverter {
  27     private static final int maxOFPhysicalPort = (OFPort.OFPP_MAX.getValue() & 0x7FFF) | 0x8000;
  28
  29     /**
  30      * Converts the Openflow port number to the equivalent NodeConnector.
  31      */
  32     public static NodeConnector toNodeConnector(short ofPort, Node node) {
  33         // Restore original OF unsigned 16 bits value for the comparison
  34         int unsignedOFPort = (ofPort & 0x7FFF) | 0x8000;
  35
  36         if (unsignedOFPort > maxOFPhysicalPort) {
  37             if (ofPort == OFPort.OFPP_LOCAL.getValue()) {
  38                 return NodeConnectorCreator.createNodeConnector(
  39                         NodeConnectorIDType.SWSTACK,
  40                         NodeConnector.SPECIALNODECONNECTORID, node);
  41             } else if (ofPort == OFPort.OFPP_NORMAL.getValue()) {
  42                 return NodeConnectorCreator.createNodeConnector(
  43                         NodeConnectorIDType.HWPATH,
  44                         NodeConnector.SPECIALNODECONNECTORID, node);
  45             } else if (ofPort == OFPort.OFPP_CONTROLLER.getValue()) {
  46                 return NodeConnectorCreator.createNodeConnector(
  47                         NodeConnectorIDType.CONTROLLER,
  48                         NodeConnector.SPECIALNODECONNECTORID, node);
  49             }
  50         }
  51         return NodeConnectorCreator.createNodeConnector(ofPort, node);
  52     }
  53
  54     /**
  55      * Converts the NodeConnector to the equivalent Openflow port number
  56      */
  57     public static short toOFPort(NodeConnector salPort) {
  58         if (salPort.getType().equals(NodeConnectorIDType.SWSTACK)) {
  59             return OFPort.OFPP_LOCAL.getValue();
  60         } else if (salPort.getType().equals(
  61                 NodeConnectorIDType.HWPATH)) {
  62             return OFPort.OFPP_NORMAL.getValue();
  63         } else if (salPort.getType().equals(
  64                 NodeConnectorIDType.CONTROLLER)) {
  65             return OFPort.OFPP_CONTROLLER.getValue();
  66         }
  67         return (Short) salPort.getID();
  68     }
  69 }