diff options
Diffstat (limited to 'src/main/java/org/traccar/protocol/MxtProtocolDecoder.java')
| -rw-r--r-- | src/main/java/org/traccar/protocol/MxtProtocolDecoder.java | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/MxtProtocolDecoder.java b/src/main/java/org/traccar/protocol/MxtProtocolDecoder.java new file mode 100644 index 000000000..7bde85f87 --- /dev/null +++ b/src/main/java/org/traccar/protocol/MxtProtocolDecoder.java @@ -0,0 +1,175 @@ +/* + * Copyright 2015 - 2018 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.helper.UnitsConverter; +import org.traccar.model.Position; + +import java.net.SocketAddress; + +public class MxtProtocolDecoder extends BaseProtocolDecoder { + + public MxtProtocolDecoder(Protocol protocol) { + super(protocol); + } + + public static final int MSG_ACK = 0x02; + public static final int MSG_NACK = 0x03; + public static final int MSG_POSITION = 0x31; + + private static void sendResponse(Channel channel, int device, long id, int crc) { + if (channel != null) { + ByteBuf response = Unpooled.buffer(); + response.writeByte(device); + response.writeByte(MSG_ACK); + response.writeIntLE((int) id); + response.writeShortLE(crc); + response.writeShortLE(Checksum.crc16( + Checksum.CRC16_XMODEM, response.nioBuffer())); + + ByteBuf encoded = Unpooled.buffer(); + encoded.writeByte(0x01); // header + while (response.isReadable()) { + int b = response.readByte(); + if (b == 0x01 || b == 0x04 || b == 0x10 || b == 0x11 || b == 0x13) { + encoded.writeByte(0x10); + b += 0x20; + } + encoded.writeByte(b); + } + response.release(); + encoded.writeByte(0x04); // ending + channel.writeAndFlush(new NetworkMessage(encoded, channel.remoteAddress())); + } + } + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + ByteBuf buf = (ByteBuf) msg; + + buf.readUnsignedByte(); // start + int device = buf.readUnsignedByte(); // device descriptor + int type = buf.readUnsignedByte(); + + long id = buf.readUnsignedIntLE(); + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id)); + if (deviceSession == null) { + return null; + } + + if (type == MSG_POSITION) { + + Position position = new Position(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + buf.readUnsignedByte(); // protocol + int infoGroups = buf.readUnsignedByte(); + + position.set(Position.KEY_INDEX, buf.readUnsignedShortLE()); + + DateBuilder dateBuilder = new DateBuilder().setDate(2000, 1, 1); + + long date = buf.readUnsignedIntLE(); + + long days = BitUtil.from(date, 6 + 6 + 5); + long hours = BitUtil.between(date, 6 + 6, 6 + 6 + 5); + long minutes = BitUtil.between(date, 6, 6 + 6); + long seconds = BitUtil.to(date, 6); + + dateBuilder.addMillis((((days * 24 + hours) * 60 + minutes) * 60 + seconds) * 1000); + + position.setTime(dateBuilder.getDate()); + + position.setValid(true); + position.setLatitude(buf.readIntLE() / 1000000.0); + position.setLongitude(buf.readIntLE() / 1000000.0); + + long flags = buf.readUnsignedIntLE(); + position.set(Position.KEY_IGNITION, BitUtil.check(flags, 0)); + if (BitUtil.check(flags, 1)) { + position.set(Position.KEY_ALARM, Position.ALARM_GENERAL); + } + position.set(Position.KEY_INPUT, BitUtil.between(flags, 2, 7)); + position.set(Position.KEY_OUTPUT, BitUtil.between(flags, 7, 10)); + position.setCourse(BitUtil.between(flags, 10, 13) * 45); + // position.setValid(BitUtil.check(flags, 15)); + position.set(Position.KEY_CHARGE, BitUtil.check(flags, 20)); + + position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte())); + + buf.readUnsignedByte(); // input mask + + if (BitUtil.check(infoGroups, 0)) { + buf.skipBytes(8); // waypoints + } + + if (BitUtil.check(infoGroups, 1)) { + buf.skipBytes(8); // wireless accessory + } + + if (BitUtil.check(infoGroups, 2)) { + position.set(Position.KEY_SATELLITES, buf.readUnsignedByte()); + position.set(Position.KEY_HDOP, buf.readUnsignedByte()); + position.setAccuracy(buf.readUnsignedByte()); + position.set(Position.KEY_RSSI, buf.readUnsignedByte()); + buf.readUnsignedShortLE(); // time since boot + position.set(Position.KEY_POWER, buf.readUnsignedByte()); + position.set(Position.PREFIX_TEMP + 1, buf.readByte()); + } + + if (BitUtil.check(infoGroups, 3)) { + position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE()); + } + + if (BitUtil.check(infoGroups, 4)) { + position.set(Position.KEY_HOURS, UnitsConverter.msFromMinutes(buf.readUnsignedIntLE())); + } + + if (BitUtil.check(infoGroups, 5)) { + buf.readUnsignedIntLE(); // reason + } + + if (BitUtil.check(infoGroups, 6)) { + position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.001); + position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE()); + } + + if (BitUtil.check(infoGroups, 7)) { + position.set(Position.KEY_DRIVER_UNIQUE_ID, String.valueOf(buf.readUnsignedIntLE())); + } + + buf.readerIndex(buf.writerIndex() - 3); + sendResponse(channel, device, id, buf.readUnsignedShortLE()); + + return position; + } + + return null; + } + +} |