Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 1 | /** |
| 2 | * Copyright 2011, Big Switch Networks, Inc. |
| 3 | * Originally created by David Erickson, Stanford University |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 6 | * not use this file except in compliance with the License. You may obtain |
| 7 | * a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 13 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 14 | * License for the specific language governing permissions and limitations |
| 15 | * under the License. |
| 16 | **/ |
| 17 | |
| 18 | package net.floodlightcontroller.core.internal; |
| 19 | |
| 20 | /** |
| 21 | * Wrapper class to hold state for the OpenFlow switch connection |
| 22 | * @author readams |
| 23 | */ |
| 24 | class OFChannelState { |
| 25 | |
| 26 | /** |
| 27 | * State for handling the switch handshake |
| 28 | */ |
| 29 | protected enum HandshakeState { |
| 30 | /** |
| 31 | * Beginning state |
| 32 | */ |
| 33 | START, |
| 34 | |
| 35 | /** |
| 36 | * Received HELLO from switch |
| 37 | */ |
| 38 | HELLO, |
| 39 | |
| 40 | /** |
| 41 | * We've received the features reply |
| 42 | * Waiting for Config and Description reply |
| 43 | */ |
| 44 | FEATURES_REPLY, |
| 45 | |
| 46 | /** |
| 47 | * Switch is ready for processing messages |
| 48 | */ |
| 49 | READY |
| 50 | |
| 51 | } |
| 52 | |
| 53 | protected volatile HandshakeState hsState = HandshakeState.START; |
| 54 | protected boolean hasGetConfigReply = false; |
| 55 | protected boolean hasDescription = false; |
| 56 | |
| 57 | // The firstRoleReplyRecevied flag indicates if we have received the |
| 58 | // first role reply message on this connection (in response to the |
| 59 | // role request sent after the handshake). If role support is disabled |
| 60 | // on the controller we also set this flag to true. |
| 61 | // The flag is used to decide if the flow table should be wiped |
| 62 | // @see Controller.handleRoleReplyMessage() |
| 63 | protected boolean firstRoleReplyReceived = false; |
| 64 | } |