/* * Copyright 2013 - 2017 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 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, 0xe2, 0xe9 }; 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(0x5b, 7); // variable length TAG_LENGTH_MAP.put(0x5c, 68); } private static int getTagLength(int tag) { Integer length = TAG_LENGTH_MAP.get(tag); if (length == null) { throw new IllegalArgumentException("Unknown tag: " + tag); } return length; } 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); } } private void decodeTag(Position position, ChannelBuffer buf, int tag) { switch (tag) { case 0x01: position.set(Position.KEY_VERSION_HW, buf.readUnsignedByte()); break; case 0x02: position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte()); break; case 0x04: position.set("deviceId", buf.readUnsignedShort()); break; case 0x10: position.set(Position.KEY_INDEX, buf.readUnsignedShort()); break; case 0x20: position.setTime(new Date(buf.readUnsignedInt() * 1000)); break; case 0x33: position.setSpeed(buf.readUnsignedShort() * 0.0539957); position.setCourse(buf.readUnsignedShort() * 0.1); break; case 0x34: position.setAltitude(buf.readShort()); break; case 0x40: position.set(Position.KEY_STATUS, buf.readUnsignedShort()); break; case 0x41: position.set(Position.KEY_POWER, buf.readUnsignedShort()); break; case 0x42: position.set(Position.KEY_BATTERY, buf.readUnsignedShort()); break; case 0x43: position.set(Position.KEY_DEVICE_TEMP, buf.readByte()); break; case 0x44: position.set(Position.KEY_ACCELERATION, buf.readUnsignedInt()); break; case 0x45: position.set(Position.KEY_OUTPUT, buf.readUnsignedShort()); break; case 0x46: position.set(Position.KEY_INPUT, buf.readUnsignedShort()); break; case 0x50: case 0x51: case 0x52: case 0x53: case 0x54: case 0x55: case 0x56: case 0x57: position.set(Position.PREFIX_ADC + (tag - 0x50), buf.readUnsignedShort()); break; case 0x58: position.set("rs2320", buf.readUnsignedShort()); break; case 0x59: position.set("rs2321", buf.readUnsignedShort()); break; case 0xc0: position.set("fuelTotal", buf.readUnsignedInt() * 0.5); break; case 0xc1: position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.4); position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedByte() - 40); position.set(Position.KEY_RPM, buf.readUnsignedShort() * 0.125); break; case 0xc2: position.set("canB0", buf.readUnsignedInt()); break; case 0xc3: position.set("canB1", buf.readUnsignedInt()); break; case 0xc4: case 0xc5: case 0xc6: case 0xc7: case 0xc8: case 0xc9: case 0xca: case 0xcb: case 0xcc: case 0xcd: case 0xce: case 0xcf: case 0xd0: case 0xd1: case 0xd2: position.set("can8Bit" + (tag - 0xc4), buf.readUnsignedByte()); break; case 0xd6: case 0xd7: case 0xd8: case 0xd9: case 0xda: position.set("can16Bit" + (tag - 0xd6), buf.readUnsignedShort()); break; case 0xdb: case 0xdc: case 0xdd: case 0xde: case 0xdf: position.set("can32Bit" + (tag - 0xdb), buf.readUnsignedInt()); break; case 0xd4: position.set(Position.KEY_ODOMETER, buf.readUnsignedInt()); break; case 0xe0: position.set(Position.KEY_INDEX, buf.readUnsignedInt()); break; case 0xe1: position.set(Position.KEY_RESULT, buf.readBytes(buf.readUnsignedByte()).toString(StandardCharsets.US_ASCII)); break; case 0xe2: case 0xe3: case 0xe4: case 0xe5: case 0xe6: case 0xe7: case 0xe8: case 0xe9: position.set("userData" + (tag - 0xe2), buf.readUnsignedInt()); break; case 0xea: position.set("userDataArray", ChannelBuffers.hexDump(buf.readBytes(buf.readUnsignedByte()))); break; default: buf.skipBytes(getTagLength(tag)); break; } } @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; DeviceSession deviceSession = null; 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); if (tag == 0x03) { deviceSession = getDeviceSession( channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII)); } else if (tag == 0x30) { hasLocation = true; position.setValid((buf.readUnsignedByte() & 0xf0) == 0x00); position.setLatitude(buf.readInt() / 1000000.0); position.setLongitude(buf.readInt() / 1000000.0); } else { decodeTag(position, buf, tag); } } if (hasLocation && position.getFixTime() != null) { positions.add(position); } else if (position.getAttributes().containsKey(Position.KEY_RESULT)) { getLastLocation(position, null); positions.add(position); } if (deviceSession == null) { deviceSession = getDeviceSession(channel, remoteAddress); if (deviceSession == null) { return null; } } sendReply(channel, buf.readUnsignedShort()); for (Position p : positions) { p.setProtocol(getProtocolName()); p.setDeviceId(deviceSession.getDeviceId()); } return positions.isEmpty() ? null : positions; } }