/* * Copyright 2013 - 2014 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.ByteOrder; import java.nio.charset.Charset; import java.util.*; 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.helper.Log; import org.traccar.model.Event; import org.traccar.model.Position; public class GalileoProtocolDecoder extends BaseProtocolDecoder { public GalileoProtocolDecoder(String protocol) { super(protocol); } private static final int TAG_IMEI = 0x03; private static final int TAG_DATE = 0x20; private static final int TAG_COORDINATES = 0x30; private static final int TAG_SPEED_COURSE = 0x33; private static final int TAG_ALTITUDE = 0x34; private static final int TAG_STATUS = 0x40; private static final int TAG_POWER = 0x41; private static final int TAG_BATTERY = 0x42; private static final int TAG_ODOMETER = 0xd4; private static final int TAG_REFRIGERATOR = 0x5b; private static final int TAG_PRESSURE = 0x5c; private static final Map<Integer, Integer> tagLengthMap = new HashMap<Integer, Integer>(); static { int[] l1 = {0x01,0x02,0x35,0x43,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,0xd0,0xd1,0xd2,0xd5,0x88,0x8a,0x8b,0x8c,0xa0,0xaf,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae}; int[] l2 = {0x04,0x10,0x34,0x40,0x41,0x42,0x45,0x46,0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x60,0x61,0x62,0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xd6,0xd7,0xd8,0xd9,0xda}; int[] l3 = {0x63,0x64,0x6f,0x5d,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e}; int[] l4 = {0x20,0x33,0x44,0x90,0xc0,0xc1,0xc2,0xc3,0xd3,0xd4,0xdb,0xdc,0xdd,0xde,0xdf,0xf0,0xf9,0x5a,0x47,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8}; for (int i : l1) { tagLengthMap.put(i, 1); } for (int i : l2) { tagLengthMap.put(i, 2); } for (int i : l3) { tagLengthMap.put(i, 3); } for (int i : l4) { tagLengthMap.put(i, 4); } tagLengthMap.put(TAG_COORDINATES, 9); tagLengthMap.put(TAG_IMEI, 15); tagLengthMap.put(TAG_REFRIGERATOR, 7); // variable length tagLengthMap.put(TAG_PRESSURE, 68); } private static int getTagLength(int tag) { return tagLengthMap.get(tag); } private void sendReply(Channel channel, int checksum) { ChannelBuffer reply = ChannelBuffers.directBuffer(ByteOrder.LITTLE_ENDIAN, 3); reply.writeByte(0x02); reply.writeShort((short) checksum); if (channel != null) { channel.write(reply); } } @Override protected Object decode( ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception { ChannelBuffer buf = (ChannelBuffer) msg; buf.readUnsignedByte(); // header int length = (buf.readUnsignedShort() & 0x7fff) + 3; List<Position> positions = new LinkedList<Position>(); Set<Integer> tags = new HashSet<Integer>(); boolean hasLocation = false; Position position = new Position(); position.setProtocol(getProtocol()); while (buf.readerIndex() < length) { // Check if new message started int tag = buf.readUnsignedByte(); if (tags.contains(tag)) { if (hasLocation && position.getFixTime() != null) { positions.add(position); } tags.clear(); hasLocation = false; position = new Position(); } tags.add(tag); switch (tag) { case TAG_IMEI: String imei = buf.toString(buf.readerIndex(), 15, Charset.defaultCharset()); buf.skipBytes(imei.length()); identify(imei); break; case TAG_DATE: position.setTime(new Date(buf.readUnsignedInt() * 1000)); break; case TAG_COORDINATES: hasLocation = true; position.setValid((buf.readUnsignedByte() & 0xf0) == 0x00); position.setLatitude(buf.readInt() / 1000000.0); position.setLongitude(buf.readInt() / 1000000.0); break; case TAG_SPEED_COURSE: position.setSpeed(buf.readUnsignedShort() * 0.0539957); position.setCourse(buf.readUnsignedShort() * 0.1); break; case TAG_ALTITUDE: position.setAltitude(buf.readShort()); break; case TAG_STATUS: position.set(Event.KEY_STATUS, buf.readUnsignedShort()); break; case TAG_POWER: position.set(Event.KEY_POWER, buf.readUnsignedShort()); break; case TAG_BATTERY: position.set(Event.KEY_BATTERY, buf.readUnsignedShort()); break; case TAG_ODOMETER: position.set(Event.KEY_ODOMETER, buf.readUnsignedInt()); break; default: buf.skipBytes(getTagLength(tag)); break; } } if (hasLocation && position.getFixTime() != null) { positions.add(position); } if (!hasDeviceId()) { Log.warning("Unknown device"); return null; } sendReply(channel, buf.readUnsignedShort()); for (Position p : positions) { p.setDeviceId(getDeviceId()); } if (positions.isEmpty()) { return null; } return positions; } }