diff options
Diffstat (limited to 'src/main/java/org/traccar/protocol/BlueProtocolDecoder.java')
| -rw-r--r-- | src/main/java/org/traccar/protocol/BlueProtocolDecoder.java | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/BlueProtocolDecoder.java b/src/main/java/org/traccar/protocol/BlueProtocolDecoder.java new file mode 100644 index 000000000..f35ac6fbe --- /dev/null +++ b/src/main/java/org/traccar/protocol/BlueProtocolDecoder.java @@ -0,0 +1,170 @@ +/* + * Copyright 2019 - 2020 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.buffer.Unpooled; +import io.netty.channel.Channel; +import org.traccar.BaseProtocolDecoder; +import org.traccar.DeviceSession; +import org.traccar.NetworkMessage; +import org.traccar.Protocol; +import org.traccar.helper.BitUtil; +import org.traccar.helper.Checksum; +import org.traccar.helper.DateBuilder; +import org.traccar.model.Position; + +import java.net.SocketAddress; + +public class BlueProtocolDecoder extends BaseProtocolDecoder { + + public BlueProtocolDecoder(Protocol protocol) { + super(protocol); + } + + private double readCoordinate(ByteBuf buf, boolean negative) { + + int value = buf.readUnsignedShort(); + int degrees = value / 100; + double minutes = value % 100 + buf.readUnsignedShort() * 0.0001; + double coordinate = degrees + minutes / 60; + return negative ? -coordinate : coordinate; + } + + private void sendResponse(Channel channel, int deviceIndex) { + if (channel != null) { + + ByteBuf response = Unpooled.buffer(); + response.writeByte(0xaa); + response.writeShort(2 + 1 + 1 + 6 + 1); + response.writeByte(0x86); // version + response.writeByte(0); + + response.writeByte(6); // data length + response.writeByte(0xa4); // type + response.writeByte(0); // server index + response.writeByte(deviceIndex); + response.writeByte(0); + response.writeByte(0); + + response.writeByte(Checksum.xor(response.nioBuffer(1, response.writerIndex() - 1))); + + channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress())); + } + } + + private String decodeAlarm(int value) { + switch (value) { + case 1: + return Position.ALARM_SOS; + case 8: + return Position.ALARM_OVERSPEED; + case 19: + return Position.ALARM_LOW_POWER; + default: + return null; + } + } + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + ByteBuf buf = (ByteBuf) msg; + + buf.readUnsignedByte(); // header + buf.readUnsignedShort(); // length + buf.readUnsignedByte(); // version + buf.readUnsignedByte(); + + String id = String.valueOf(buf.readUnsignedInt()); + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id); + if (deviceSession == null) { + return null; + } + + Position position = new Position(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + while (buf.readableBytes() > 1) { + + int frameEnd = buf.readerIndex() + buf.readUnsignedByte(); + + int type = buf.readUnsignedByte(); + int index = buf.readUnsignedByte(); + buf.readUnsignedByte(); + buf.readUnsignedByte(); // flags + + if (type == 0x01) { + + buf.readUnsignedByte(); // reserved + int flags = buf.readUnsignedByte(); + + position.setValid(BitUtil.check(flags, 7)); + position.setLatitude(readCoordinate(buf, BitUtil.check(flags, 6))); + position.setLongitude(readCoordinate(buf, BitUtil.check(flags, 5))); + position.setSpeed(buf.readUnsignedShort() + buf.readUnsignedShort() * 0.001); + position.setCourse(buf.readUnsignedShort() + buf.readUnsignedByte() * 0.01); + + DateBuilder dateBuilder = new DateBuilder() + .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()) + .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()); + position.setTime(dateBuilder.getDate()); + + buf.readUnsignedShort(); // lac + buf.readUnsignedShort(); // cid + + } else if (type == 0x12) { + + int status; + + status = buf.readUnsignedByte(); // status 1 + position.set(Position.KEY_ALARM, BitUtil.check(status, 1) ? Position.ALARM_VIBRATION : null); + + buf.readUnsignedByte(); // status 2 + buf.readUnsignedByte(); // status 3 + + status = buf.readUnsignedByte(); // status 4 + int ignition = BitUtil.between(status, 2, 4); + if (ignition == 0b01) { + position.set(Position.KEY_IGNITION, false); + } + if (ignition == 0b10) { + position.set(Position.KEY_IGNITION, true); + } + + buf.readUnsignedByte(); // status 5 + buf.readUnsignedByte(); // status 6 + + position.set(Position.KEY_STATUS, buf.readUnsignedShort()); + + } else if (type == 0x81) { + + position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte())); + + } else if (type == 0x84) { + + sendResponse(channel, index); + + } + + buf.readerIndex(frameEnd); + } + + return position.getFixTime() != null ? position : null; + } + +} |