| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.onlab.onos.openflow.controller.driver; |
| |
| import org.onlab.onos.openflow.controller.Dpid; |
| import org.onlab.onos.openflow.controller.OpenFlowSwitch; |
| import org.onlab.onos.openflow.controller.RoleState; |
| import org.projectfloodlight.openflow.protocol.OFMessage; |
| |
| /** |
| * Responsible for keeping track of the current set of switches |
| * connected to the system. As well as whether they are in Master |
| * role or not. |
| * |
| */ |
| public interface OpenFlowAgent { |
| |
| /** |
| * Add a switch that has just connected to the system. |
| * @param dpid the dpid to add |
| * @param sw the actual switch object. |
| * @return true if added, false otherwise. |
| */ |
| public boolean addConnectedSwitch(Dpid dpid, OpenFlowSwitch sw); |
| |
| /** |
| * Checks if the activation for this switch is valid. |
| * @param dpid the dpid to check |
| * @return true if valid, false otherwise |
| */ |
| public boolean validActivation(Dpid dpid); |
| |
| /** |
| * Called when a switch is activated, with this controller's role as MASTER. |
| * @param dpid the dpid to add. |
| * @param sw the actual switch |
| * @return true if added, false otherwise. |
| */ |
| public boolean addActivatedMasterSwitch(Dpid dpid, OpenFlowSwitch sw); |
| |
| /** |
| * Called when a switch is activated, with this controller's role as EQUAL. |
| * @param dpid the dpid to add. |
| * @param sw the actual switch |
| * @return true if added, false otherwise. |
| */ |
| public boolean addActivatedEqualSwitch(Dpid dpid, OpenFlowSwitch sw); |
| |
| /** |
| * Called when this controller's role for a switch transitions from equal |
| * to master. For 1.0 switches, we internally refer to the role 'slave' as |
| * 'equal' - so this transition is equivalent to 'addActivatedMasterSwitch'. |
| * @param dpid the dpid to transistion. |
| */ |
| public void transitionToMasterSwitch(Dpid dpid); |
| |
| /** |
| * Called when this controller's role for a switch transitions to equal. |
| * For 1.0 switches, we internally refer to the role 'slave' as |
| * 'equal'. |
| * @param dpid the dpid to transistion. |
| */ |
| public void transitionToEqualSwitch(Dpid dpid); |
| |
| /** |
| * Clear all state in controller switch maps for a switch that has |
| * disconnected from the local controller. Also release control for |
| * that switch from the global repository. Notify switch listeners. |
| * @param dpid the dpid to remove. |
| */ |
| public void removeConnectedSwitch(Dpid dpid); |
| |
| /** |
| * Process a message coming from a switch. |
| * |
| * @param dpid the dpid the message came on. |
| * @param m the message to process |
| */ |
| public void processMessage(Dpid dpid, OFMessage m); |
| |
| /** |
| * Notifies the controller that role assertion has failed. |
| * |
| * @param dpid the switch that failed role assertion |
| * @param role the failed role |
| */ |
| public void returnRoleAssertFailed(Dpid dpid, RoleState role); |
| } |