/* * Copyright 2013 - 2016 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 org.jboss.netty.buffer.ChannelBuffer; import org.jboss.netty.buffer.ChannelBuffers; import org.jboss.netty.channel.Channel; import org.traccar.BaseProtocolDecoder; import org.traccar.DeviceSession; import org.traccar.model.Position; import java.net.SocketAddress; import java.nio.ByteOrder; import java.nio.charset.StandardCharsets; import java.util.Date; import java.util.HashMap; import java.util.HashSet; import java.util.LinkedList; import java.util.List; import java.util.Map; import java.util.Set; public class GalileoProtocolDecoder extends BaseProtocolDecoder { public GalileoProtocolDecoder(GalileoProtocol 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 int TAG_CAN = 0xc1; private static final int TAG_ADC0 = 0x50; private static final int TAG_ADC1 = 0x51; private static final int TAG_ADC2 = 0x52; private static final int TAG_ADC3 = 0x53; private static final Map<Integer, Integer> TAG_LENGTH_MAP = new HashMap<>(); 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, 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, 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) { TAG_LENGTH_MAP.put(i, 1); } for (int i : l2) { TAG_LENGTH_MAP.put(i, 2); } for (int i : l3) { TAG_LENGTH_MAP.put(i, 3); } for (int i : l4) { TAG_LENGTH_MAP.put(i, 4); } TAG_LENGTH_MAP.put(TAG_COORDINATES, 9); TAG_LENGTH_MAP.put(TAG_IMEI, 15); TAG_LENGTH_MAP.put(TAG_REFRIGERATOR, 7); // variable length TAG_LENGTH_MAP.put(TAG_PRESSURE, 68); } private static int getTagLength(int tag) { return TAG_LENGTH_MAP.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( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { ChannelBuffer buf = (ChannelBuffer) msg; buf.readUnsignedByte(); // header int length = (buf.readUnsignedShort() & 0x7fff) + 3; List<Position> positions = new LinkedList<>(); Set<Integer> tags = new HashSet<>(); boolean hasLocation = false; Position position = new Position(); 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: getDeviceSession(channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII)); 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(Position.KEY_STATUS, buf.readUnsignedShort()); break; case TAG_POWER: position.set(Position.KEY_POWER, buf.readUnsignedShort()); break; case TAG_BATTERY: position.set(Position.KEY_BATTERY, buf.readUnsignedShort()); break; case TAG_ODOMETER: position.set(Position.KEY_ODOMETER, buf.readUnsignedInt()); break; case TAG_CAN: position.set(Position.KEY_FUEL, buf.readUnsignedByte() * 0.4); position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedByte() - 40); position.set(Position.KEY_RPM, buf.readUnsignedShort() * 0.125); break; case TAG_ADC0: position.set(Position.PREFIX_ADC + 0, buf.readUnsignedShort()); break; case TAG_ADC1: position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort()); break; case TAG_ADC2: position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort()); break; case TAG_ADC3: position.set(Position.PREFIX_ADC + 3, buf.readUnsignedShort()); break; default: buf.skipBytes(getTagLength(tag)); break; } } if (hasLocation && position.getFixTime() != null) { positions.add(position); } DeviceSession deviceSession = getDeviceSession(channel, remoteAddress); if (deviceSession == null) { return null; } sendReply(channel, buf.readUnsignedShort()); for (Position p : positions) { p.setProtocol(getProtocolName()); p.setDeviceId(deviceSession.getDeviceId()); } if (positions.isEmpty()) { return null; } return positions; } }