/* * Copyright 2013 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 java.nio.charset.Charset; import java.util.Date; import java.util.LinkedList; import java.util.List; import org.jboss.netty.buffer.ChannelBuffer; import org.jboss.netty.buffer.ChannelBuffers; import org.jboss.netty.channel.Channel; import org.jboss.netty.channel.ChannelHandlerContext; import org.traccar.BaseProtocolDecoder; import org.traccar.ServerManager; import org.traccar.helper.Log; import org.traccar.model.ExtendedInfoFormatter; import org.traccar.model.Position; public class TeltonikaProtocolDecoder extends BaseProtocolDecoder { private long deviceId; public TeltonikaProtocolDecoder(ServerManager serverManager) { super(serverManager); } private void parseIdentification(Channel channel, ChannelBuffer buf) { boolean result = false; int length = buf.readUnsignedShort(); String imei = buf.toString(buf.readerIndex(), length, Charset.defaultCharset()); try { deviceId = getDataManager().getDeviceByImei(imei).getId(); result = true; } catch(Exception error) { Log.warning("Unknown device - " + imei); } if (channel != null) { ChannelBuffer response = ChannelBuffers.directBuffer(1); response.writeByte(result ? 1 : 0); channel.write(response); } } private static boolean checkBit(long mask, int bit) { long checkMask = 1 << bit; return (mask & checkMask) == checkMask; } private static final int CODEC_GH3000 = 0x07; private static final int CODEC_FM4X00 = 0x08; private List<Position> parseLocation(Channel channel, ChannelBuffer buf) { List<Position> positions = new LinkedList<Position>(); buf.skipBytes(4); // marker buf.readUnsignedInt(); // data length int codec = buf.readUnsignedByte(); // codec int count = buf.readUnsignedByte(); for (int i = 0; i < count; i++) { Position position = new Position(); ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter("teltonika"); position.setDeviceId(deviceId); int globalMask = 0x0f; if (codec == CODEC_GH3000) { long time = buf.readUnsignedInt() & 0x3fffffff; time += 1167609600; // 2007-01-01 00:00:00 position.setTime(new Date(time * 1000)); globalMask = buf.readUnsignedByte(); if (!checkBit(globalMask, 0)) { return null; } int locationMask = buf.readUnsignedByte(); if (checkBit(locationMask, 0)) { position.setLatitude(Double.valueOf(buf.readFloat())); position.setLongitude(Double.valueOf(buf.readFloat())); } if (checkBit(locationMask, 1)) { position.setAltitude((double) buf.readUnsignedShort()); } if (checkBit(locationMask, 2)) { position.setCourse(buf.readUnsignedByte() * 360.0 / 256); } if (checkBit(locationMask, 3)) { position.setSpeed(buf.readUnsignedByte() * 0.539957); } if (checkBit(locationMask, 4)) { int satellites = buf.readUnsignedByte(); extendedInfo.set("satellites", satellites); position.setValid(satellites >= 3); } if (checkBit(locationMask, 5)) { extendedInfo.set("area", buf.readUnsignedShort()); extendedInfo.set("cell", buf.readUnsignedShort()); } if (checkBit(locationMask, 6)) { extendedInfo.set("gsm", buf.readUnsignedByte()); } if (checkBit(locationMask, 7)) { extendedInfo.set("operator", buf.readUnsignedInt()); } } else { position.setTime(new Date(buf.readLong())); extendedInfo.set("priority", buf.readUnsignedByte()); position.setLongitude(buf.readInt() / 10000000.0); position.setLatitude(buf.readInt() / 10000000.0); position.setAltitude((double) buf.readUnsignedShort()); position.setCourse((double) buf.readUnsignedShort()); int satellites = buf.readUnsignedByte(); extendedInfo.set("satellites", satellites); position.setValid(satellites != 0); position.setSpeed(buf.readUnsignedShort() * 0.539957); extendedInfo.set("event", buf.readUnsignedByte()); buf.readUnsignedByte(); // total IO data records } // Read 1 byte data if (checkBit(globalMask, 1)) { int cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { extendedInfo.set("io" + buf.readUnsignedByte(), buf.readUnsignedByte()); } } // Read 2 byte data if (checkBit(globalMask, 2)) { int cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { extendedInfo.set("io" + buf.readUnsignedByte(), buf.readUnsignedShort()); } } // Read 4 byte data if (checkBit(globalMask, 3)) { int cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { extendedInfo.set("io" + buf.readUnsignedByte(), buf.readUnsignedInt()); } } // Read 8 byte data if (codec == CODEC_FM4X00) { int cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { extendedInfo.set("io" + buf.readUnsignedByte(), buf.readLong()); } } position.setExtendedInfo(extendedInfo.toString()); positions.add(position); } if (channel != null) { ChannelBuffer response = ChannelBuffers.directBuffer(4); response.writeInt(count); channel.write(response); } return positions; } @Override protected Object decode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception { ChannelBuffer buf = (ChannelBuffer) msg; if (buf.getUnsignedShort(0) > 0) { parseIdentification(channel, buf); } else { return parseLocation(channel, buf); } return null; } }