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author | casswarry0 <casswarry0@gmail.com> | 2023-01-17 17:14:53 -0700 |
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committer | casswarry0 <casswarry0@gmail.com> | 2023-01-17 17:14:53 -0700 |
commit | 7338b8730949ed027b3f8b31d7dca20687ebbb8b (patch) | |
tree | c2d171e6121818ab511460a786f69aab97a2a628 /src/main/java/org/traccar/protocol/Dsf22FrameDecoder.java | |
parent | cdecd3fa4427a382c0b09f8ad9d69ec14388960a (diff) | |
parent | 85501f9cf4918d5eee345f83aed7a31eecb26b8d (diff) | |
download | trackermap-server-7338b8730949ed027b3f8b31d7dca20687ebbb8b.tar.gz trackermap-server-7338b8730949ed027b3f8b31d7dca20687ebbb8b.tar.bz2 trackermap-server-7338b8730949ed027b3f8b31d7dca20687ebbb8b.zip |
Merge branch 'master' into develop
Diffstat (limited to 'src/main/java/org/traccar/protocol/Dsf22FrameDecoder.java')
-rw-r--r-- | src/main/java/org/traccar/protocol/Dsf22FrameDecoder.java | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/Dsf22FrameDecoder.java b/src/main/java/org/traccar/protocol/Dsf22FrameDecoder.java new file mode 100644 index 000000000..388c97f85 --- /dev/null +++ b/src/main/java/org/traccar/protocol/Dsf22FrameDecoder.java @@ -0,0 +1,44 @@ +/* + * Copyright 2021 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 Dsf22FrameDecoder extends BaseFrameDecoder { + + @Override + protected Object decode( + ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception { + + if (buf.readableBytes() < 21) { + return null; + } + + int count = buf.getUnsignedByte(buf.readerIndex() + 4); + + int length = 2 + 2 + 1 + count * (4 + 4 + 4 + 1 + 2 + 1); + + if (buf.readableBytes() >= length) { + return buf.readRetainedSlice(length); + } else { + return null; + } + } + +} |