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

   1 /*
   2  * Copyright (c) 2013 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.controller.protocol_plugin.openflow.internal;
  10
  11 import org.opendaylight.controller.sal.core.Node;
  12 import org.opendaylight.controller.sal.core.NodeConnector;
  13 import org.opendaylight.controller.sal.core.NodeConnector.NodeConnectorIDType;
  14 import org.opendaylight.controller.sal.utils.NetUtils;
  15 import org.opendaylight.controller.sal.utils.NodeConnectorCreator;
  16 import org.openflow.protocol.OFPort;
  17 import org.slf4j.Logger;
  18 import org.slf4j.LoggerFactory;
  19
  20 /**
  21  * Abstract class which provides the utilities for converting the Openflow port
  22  * number to the equivalent NodeConnector and vice versa
  23  *
  24  *
  25  *
  26  */
  27 public abstract class PortConverter {
  28     private static final Logger log = LoggerFactory
  29             .getLogger(PortConverter.class);
  30     private static final int maxOFPhysicalPort = NetUtils
  31             .getUnsignedShort(OFPort.OFPP_MAX.getValue());
  32
  33     /**
  34      * Converts the Openflow port number to the equivalent NodeConnector.
  35      */
  36     public static NodeConnector toNodeConnector(short ofPort, Node node) {
  37         // Restore original OF unsigned 16 bits value for the comparison
  38         int unsignedOFPort = NetUtils.getUnsignedShort(ofPort);
  39         log.trace("Openflow port number signed: {} unsigned: {}", ofPort,
  40                 unsignedOFPort);
  41         if (unsignedOFPort > maxOFPhysicalPort) {
  42             if (ofPort == OFPort.OFPP_LOCAL.getValue()) {
  43                 return NodeConnectorCreator.createNodeConnector(
  44                         NodeConnectorIDType.SWSTACK,
  45                         NodeConnector.SPECIALNODECONNECTORID, node);
  46             } else if (ofPort == OFPort.OFPP_NORMAL.getValue()) {
  47                 return NodeConnectorCreator.createNodeConnector(
  48                         NodeConnectorIDType.HWPATH,
  49                         NodeConnector.SPECIALNODECONNECTORID, node);
  50             } else if (ofPort == OFPort.OFPP_CONTROLLER.getValue()) {
  51                 return NodeConnectorCreator.createNodeConnector(
  52                         NodeConnectorIDType.CONTROLLER,
  53                         NodeConnector.SPECIALNODECONNECTORID, node);
  54             }
  55         }
  56         return NodeConnectorCreator.createNodeConnector(ofPort, node);
  57     }
  58
  59     /**
  60      * Converts the NodeConnector to the equivalent Openflow port number
  61      */
  62     public static short toOFPort(NodeConnector salPort) {
  63         log.trace("SAL Port", salPort);
  64         if (salPort.getType().equals(NodeConnectorIDType.SWSTACK)) {
  65             return OFPort.OFPP_LOCAL.getValue();
  66         } else if (salPort.getType().equals(NodeConnectorIDType.HWPATH)) {
  67             return OFPort.OFPP_NORMAL.getValue();
  68         } else if (salPort.getType().equals(NodeConnectorIDType.CONTROLLER)) {
  69             return OFPort.OFPP_CONTROLLER.getValue();
  70         }
  71         return (Short) salPort.getID();
  72     }
  73 }