Thomas Vachuska | 781d18b | 2014-10-27 10:31:25 -0700 | [diff] [blame] | 1 | /* |
Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [diff] [blame] | 2 | * Copyright 2014 Open Networking Laboratory |
Thomas Vachuska | 781d18b | 2014-10-27 10:31:25 -0700 | [diff] [blame] | 3 | * |
Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [diff] [blame] | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
Thomas Vachuska | 781d18b | 2014-10-27 10:31:25 -0700 | [diff] [blame] | 7 | * |
Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [diff] [blame] | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
Thomas Vachuska | 781d18b | 2014-10-27 10:31:25 -0700 | [diff] [blame] | 15 | */ |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 16 | |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 17 | package org.onosproject.openflow.controller.impl; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 18 | |
| 19 | import java.util.concurrent.TimeUnit; |
| 20 | |
| 21 | import org.jboss.netty.channel.ChannelHandlerContext; |
| 22 | import org.jboss.netty.channel.ChannelStateEvent; |
| 23 | import org.jboss.netty.channel.Channels; |
| 24 | import org.jboss.netty.channel.SimpleChannelUpstreamHandler; |
| 25 | import org.jboss.netty.util.Timeout; |
| 26 | import org.jboss.netty.util.Timer; |
| 27 | import org.jboss.netty.util.TimerTask; |
| 28 | |
| 29 | /** |
| 30 | * Trigger a timeout if a switch fails to complete handshake soon enough. |
| 31 | */ |
| 32 | public class HandshakeTimeoutHandler |
| 33 | extends SimpleChannelUpstreamHandler { |
| 34 | static final HandshakeTimeoutException EXCEPTION = |
| 35 | new HandshakeTimeoutException(); |
| 36 | |
| 37 | final OFChannelHandler channelHandler; |
| 38 | final Timer timer; |
| 39 | final long timeoutNanos; |
| 40 | volatile Timeout timeout; |
| 41 | |
| 42 | public HandshakeTimeoutHandler(OFChannelHandler channelHandler, |
| 43 | Timer timer, |
| 44 | long timeoutSeconds) { |
| 45 | super(); |
| 46 | this.channelHandler = channelHandler; |
| 47 | this.timer = timer; |
| 48 | this.timeoutNanos = TimeUnit.SECONDS.toNanos(timeoutSeconds); |
| 49 | |
| 50 | } |
| 51 | |
| 52 | @Override |
| 53 | public void channelOpen(ChannelHandlerContext ctx, ChannelStateEvent e) |
| 54 | throws Exception { |
| 55 | if (timeoutNanos > 0) { |
| 56 | timeout = timer.newTimeout(new HandshakeTimeoutTask(ctx), |
| 57 | timeoutNanos, TimeUnit.NANOSECONDS); |
| 58 | } |
| 59 | ctx.sendUpstream(e); |
| 60 | } |
| 61 | |
| 62 | @Override |
| 63 | public void channelClosed(ChannelHandlerContext ctx, ChannelStateEvent e) |
| 64 | throws Exception { |
| 65 | if (timeout != null) { |
| 66 | timeout.cancel(); |
| 67 | timeout = null; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | private final class HandshakeTimeoutTask implements TimerTask { |
| 72 | |
| 73 | private final ChannelHandlerContext ctx; |
| 74 | |
| 75 | HandshakeTimeoutTask(ChannelHandlerContext ctx) { |
| 76 | this.ctx = ctx; |
| 77 | } |
| 78 | |
| 79 | @Override |
| 80 | public void run(Timeout t) throws Exception { |
| 81 | if (t.isCancelled()) { |
| 82 | return; |
| 83 | } |
| 84 | |
| 85 | if (!ctx.getChannel().isOpen()) { |
| 86 | return; |
| 87 | } |
| 88 | if (!channelHandler.isHandshakeComplete()) { |
| 89 | Channels.fireExceptionCaught(ctx, EXCEPTION); |
| 90 | } |
| 91 | } |
| 92 | } |
| 93 | } |