From bec490817a2251dc37f727f3a755a20411761993 Mon Sep 17 00:00:00 2001 From: Anton Tananaev Date: Wed, 24 Apr 2019 21:37:47 -0700 Subject: Implement Suntech frame decoder --- .../org/traccar/protocol/SuntechFrameDecoder.java | 47 ++++++++++++++++++++++ .../java/org/traccar/protocol/SuntechProtocol.java | 5 +-- 2 files changed, 49 insertions(+), 3 deletions(-) create mode 100644 src/main/java/org/traccar/protocol/SuntechFrameDecoder.java (limited to 'src/main') diff --git a/src/main/java/org/traccar/protocol/SuntechFrameDecoder.java b/src/main/java/org/traccar/protocol/SuntechFrameDecoder.java new file mode 100644 index 000000000..de8de17f0 --- /dev/null +++ b/src/main/java/org/traccar/protocol/SuntechFrameDecoder.java @@ -0,0 +1,47 @@ +/* + * Copyright 2019 Anton Tananaev (anton@traccar.org) + * + * 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.traccar.protocol; + +import io.netty.buffer.ByteBuf; +import io.netty.channel.Channel; +import io.netty.channel.ChannelHandlerContext; +import org.traccar.BaseFrameDecoder; + +public class SuntechFrameDecoder extends BaseFrameDecoder { + + private ByteBuf readFrame(ByteBuf buf, int delimiterIndex) { + ByteBuf frame = buf.readRetainedSlice(delimiterIndex - buf.readerIndex()); + buf.skipBytes(1); // delimiter + return frame; + } + + @Override + protected Object decode( + ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception { + + int delimiterIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\r'); + while (delimiterIndex > 0) { + if (delimiterIndex + 1 < buf.writerIndex() && buf.getByte(delimiterIndex + 1) == '\n') { + delimiterIndex = buf.indexOf(delimiterIndex + 1, buf.writerIndex(), (byte) '\r'); + } else { + return readFrame(buf, delimiterIndex); + } + } + + return null; + } + +} diff --git a/src/main/java/org/traccar/protocol/SuntechProtocol.java b/src/main/java/org/traccar/protocol/SuntechProtocol.java index 29ae114e7..48d6e81c1 100644 --- a/src/main/java/org/traccar/protocol/SuntechProtocol.java +++ b/src/main/java/org/traccar/protocol/SuntechProtocol.java @@ -1,5 +1,5 @@ /* - * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org) + * Copyright 2015 - 2019 Anton Tananaev (anton@traccar.org) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -18,7 +18,6 @@ package org.traccar.protocol; import io.netty.handler.codec.string.StringDecoder; import io.netty.handler.codec.string.StringEncoder; import org.traccar.BaseProtocol; -import org.traccar.CharacterDelimiterFrameDecoder; import org.traccar.PipelineBuilder; import org.traccar.TrackerServer; import org.traccar.model.Command; @@ -37,7 +36,7 @@ public class SuntechProtocol extends BaseProtocol { addServer(new TrackerServer(false, getName()) { @Override protected void addProtocolHandlers(PipelineBuilder pipeline) { - pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '\r')); + pipeline.addLast(new SuntechFrameDecoder()); pipeline.addLast(new StringEncoder()); pipeline.addLast(new StringDecoder()); pipeline.addLast(new SuntechProtocolEncoder()); -- cgit v1.2.3