| /* |
| * Copyright 2016-present Open Networking Laboratory |
| * |
| * Licensed 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.onosproject.lisp.ctl; |
| |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.channel.ChannelInboundHandlerAdapter; |
| import io.netty.handler.timeout.IdleState; |
| import io.netty.handler.timeout.IdleStateEvent; |
| import io.netty.util.ReferenceCountUtil; |
| import org.onosproject.lisp.msg.protocols.LispEncapsulatedControl; |
| import org.onosproject.lisp.msg.protocols.LispInfoReply; |
| import org.onosproject.lisp.msg.protocols.LispInfoRequest; |
| import org.onosproject.lisp.msg.protocols.LispMapNotify; |
| import org.onosproject.lisp.msg.protocols.LispMapRegister; |
| import org.onosproject.lisp.msg.protocols.LispMapRequest; |
| import org.onosproject.lisp.msg.protocols.LispMessage; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Channel handler deals with the xTR connection and dispatches xTR messages |
| * to the appropriate locations. |
| */ |
| public class LispChannelHandler extends ChannelInboundHandlerAdapter { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| @Override |
| public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { |
| |
| try { |
| // first we need to check whether this is an ECM |
| if (msg instanceof LispEncapsulatedControl) { |
| LispMessage innerMsg = |
| extractLispMessage((LispEncapsulatedControl) msg); |
| if (innerMsg instanceof LispMapRequest) { |
| LispMapResolver mapResolver = new LispMapResolver(); |
| LispMessage lispMessage = |
| mapResolver.processMapRequest( |
| (LispEncapsulatedControl) msg); |
| |
| ctx.writeAndFlush(lispMessage); |
| } |
| } |
| |
| if (msg instanceof LispMapRegister) { |
| LispMapServer mapServer = LispMapServer.getInstance(); |
| LispMapNotify mapNotify = |
| mapServer.processMapRegister((LispMapRegister) msg); |
| |
| if (mapNotify != null) { |
| ctx.writeAndFlush(mapNotify); |
| } |
| } |
| |
| if (msg instanceof LispInfoRequest) { |
| LispMapServer mapServer = LispMapServer.getInstance(); |
| LispInfoReply infoReply = mapServer.processInfoRequest((LispInfoRequest) msg); |
| |
| ctx.writeAndFlush(infoReply); |
| } |
| } finally { |
| // try to remove the received message form the buffer |
| ReferenceCountUtil.release(msg); |
| } |
| } |
| |
| @Override |
| public void userEventTriggered(ChannelHandlerContext ctx, Object evt) |
| throws Exception { |
| |
| if (evt instanceof IdleStateEvent) { |
| IdleStateEvent event = (IdleStateEvent) evt; |
| if (event.state() == IdleState.READER_IDLE) { |
| log.info("READER_IDLE read timeout"); |
| ctx.disconnect(); |
| } else if (event.state() == IdleState.WRITER_IDLE) { |
| log.info("WRITER_IDLE write timeout"); |
| ctx.disconnect(); |
| } else if (event.state() == IdleState.ALL_IDLE) { |
| log.info("ALL_IDLE total timeout"); |
| ctx.disconnect(); |
| } |
| } |
| } |
| |
| @Override |
| public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) |
| throws Exception { |
| log.warn(cause.getMessage()); |
| |
| //TODO: add error handle mechanisms for each cases |
| } |
| |
| /** |
| * Extracts LISP message from encapsulated control message. |
| * |
| * @param ecm Encapsulated Control Message |
| * @return extracted LISP message |
| */ |
| private LispMessage extractLispMessage(LispEncapsulatedControl ecm) { |
| LispMessage message = ecm.getControlMessage(); |
| message.configSender(ecm.getSender()); |
| return message; |
| } |
| } |