/* * Copyright 2013 - 2016 Anton Tananaev (anton.tananaev@gmail.com) * * 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 org.jboss.netty.buffer.ChannelBuffer; import org.jboss.netty.buffer.ChannelBuffers; import org.jboss.netty.channel.Channel; import org.traccar.BaseProtocolDecoder; import org.traccar.helper.BitUtil; import org.traccar.helper.UnitsConverter; import org.traccar.model.Position; import java.net.SocketAddress; import java.nio.charset.StandardCharsets; import java.util.Date; import java.util.LinkedList; import java.util.List; public class TeltonikaProtocolDecoder extends BaseProtocolDecoder { public TeltonikaProtocolDecoder(TeltonikaProtocol protocol) { super(protocol); } private void parseIdentification(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) { int length = buf.readUnsignedShort(); String imei = buf.toString(buf.readerIndex(), length, StandardCharsets.US_ASCII); boolean result = identify(imei, channel, remoteAddress); if (channel != null) { ChannelBuffer response = ChannelBuffers.directBuffer(1); if (result) { response.writeByte(1); } else { response.writeByte(0); } channel.write(response); } } private static final int CODEC_GH3000 = 0x07; private static final int CODEC_FM4X00 = 0x08; private static final int CODEC_12 = 0x0C; private void decodeSerial(Position position, ChannelBuffer buf) { getLastLocation(position, null); position.set(Position.KEY_TYPE, buf.readUnsignedByte()); position.set("command", buf.readBytes(buf.readInt()).toString(StandardCharsets.US_ASCII)); } private void decodeLocation(Position position, ChannelBuffer buf, int codec) { int globalMask = 0x0f; if (codec == CODEC_GH3000) { long time = buf.readUnsignedInt() & 0x3fffffff; time += 1167609600; // 2007-01-01 00:00:00 globalMask = buf.readUnsignedByte(); if (BitUtil.check(globalMask, 0)) { position.setTime(new Date(time * 1000)); int locationMask = buf.readUnsignedByte(); if (BitUtil.check(locationMask, 0)) { position.setLatitude(buf.readFloat()); position.setLongitude(buf.readFloat()); } if (BitUtil.check(locationMask, 1)) { position.setAltitude(buf.readUnsignedShort()); } if (BitUtil.check(locationMask, 2)) { position.setCourse(buf.readUnsignedByte() * 360.0 / 256); } if (BitUtil.check(locationMask, 3)) { position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte())); } if (BitUtil.check(locationMask, 4)) { int satellites = buf.readUnsignedByte(); position.set(Position.KEY_SATELLITES, satellites); position.setValid(satellites >= 3); } if (BitUtil.check(locationMask, 5)) { position.set(Position.KEY_LAC, buf.readUnsignedShort()); position.set(Position.KEY_CID, buf.readUnsignedShort()); } if (BitUtil.check(locationMask, 6)) { position.set(Position.KEY_GSM, buf.readUnsignedByte()); } if (BitUtil.check(locationMask, 7)) { position.set("operator", buf.readUnsignedInt()); } } else { getLastLocation(position, new Date(time * 1000)); } } else { position.setTime(new Date(buf.readLong())); position.set("priority", buf.readUnsignedByte()); position.setLongitude(buf.readInt() / 10000000.0); position.setLatitude(buf.readInt() / 10000000.0); position.setAltitude(buf.readShort()); position.setCourse(buf.readUnsignedShort()); int satellites = buf.readUnsignedByte(); position.set(Position.KEY_SATELLITES, satellites); position.setValid(satellites != 0); position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort())); position.set(Position.KEY_EVENT, buf.readUnsignedByte()); buf.readUnsignedByte(); // total IO data records } // Read 1 byte data if (BitUtil.check(globalMask, 1)) { int cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { int id = buf.readUnsignedByte(); if (id == 1) { position.set(Position.KEY_POWER, buf.readUnsignedByte()); } else { position.set(Position.PREFIX_IO + id, buf.readUnsignedByte()); } } } // Read 2 byte data if (BitUtil.check(globalMask, 2)) { int cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { position.set(Position.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedShort()); } } // Read 4 byte data if (BitUtil.check(globalMask, 3)) { int cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { position.set(Position.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedInt()); } } // Read 8 byte data if (codec == CODEC_FM4X00) { int cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { position.set(Position.PREFIX_IO + buf.readUnsignedByte(), buf.readLong()); } } } private List<Position> parseData(Channel channel, ChannelBuffer buf) { List<Position> positions = new LinkedList<>(); buf.skipBytes(4); // marker buf.readUnsignedInt(); // data length int codec = buf.readUnsignedByte(); int count = buf.readUnsignedByte(); for (int i = 0; i < count; i++) { Position position = new Position(); position.setProtocol(getProtocolName()); position.setDeviceId(getDeviceId()); if (codec == CODEC_12) { decodeSerial(position, buf); } else { decodeLocation(position, buf, codec); } positions.add(position); } if (channel != null) { ChannelBuffer response = ChannelBuffers.directBuffer(4); response.writeInt(count); channel.write(response); } return positions; } @Override protected Object decode( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { ChannelBuffer buf = (ChannelBuffer) msg; if (buf.getUnsignedShort(0) > 0) { parseIdentification(channel, remoteAddress, buf); } else { return parseData(channel, buf); } return null; } }