/* * Copyright 2012 - 2015 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.net.SocketAddress; import java.nio.charset.Charset; import java.util.Date; import java.util.LinkedList; import java.util.List; import java.util.regex.Pattern; import org.jboss.netty.buffer.ChannelBuffer; import org.jboss.netty.channel.Channel; import org.traccar.BaseProtocolDecoder; import org.traccar.helper.DateBuilder; import org.traccar.helper.Parser; import org.traccar.helper.PatternBuilder; import org.traccar.helper.UnitsConverter; import org.traccar.model.Event; import org.traccar.model.Position; public class MeitrackProtocolDecoder extends BaseProtocolDecoder { public MeitrackProtocolDecoder(MeitrackProtocol protocol) { super(protocol); } private static final Pattern PATTERN = new PatternBuilder() .text("$$").expression(".") // flag .number("d+,") // length .number("(d+),") // imei .number("xxx,") // command .number("d+,").optional() .number("(d+),") // event .number("(-?d+.d+),") // latitude .number("(-?d+.d+),") // longitude .number("(dd)(dd)(dd)") // date (ddmmyy) .number("(dd)(dd)(dd),") // time .number("([AV]),") // validity .number("(d+),") // satellites .number("(d+),") // gsm signal .number("(d+.?d*),") // speed .number("(d+),") // course .number("(d+.?d*),") // hdop .number("(-?d+),") // altitude .number("(d+),") // odometer .number("(d+),") // runtime .number("(d+)|") // mcc .number("(d+)|") // mnc .number("(x+)|") // lac .number("(x+),") // cell .number("(x+),") // state .number("(x+)?|") // adc1 .number("(x+)?|") // adc2 .number("(x+)?|") // adc3 .number("(x+)|") // battery .number("(x+),") // power .groupBegin() .expression("([^,]+)?,") // event specific .expression("[^,]*,") // reserved .number("d*,") // protocol .number("(x{4})?") // fuel .groupEnd("?") .any() .text("*") .number("xx") .text("\r\n").optional() .compile(); private Position decodeRegularMessage(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) { Parser parser = new Parser(PATTERN, buf.toString(Charset.defaultCharset())); if (!parser.matches()) { return null; } Position position = new Position(); position.setProtocol(getProtocolName()); if (!identify(parser.next(), channel, remoteAddress)) { return null; } position.setDeviceId(getDeviceId()); int event = parser.nextInt(); position.set(Event.KEY_EVENT, event); position.setLatitude(parser.nextDouble()); position.setLongitude(parser.nextDouble()); DateBuilder dateBuilder = new DateBuilder() .setDate(parser.nextInt(), parser.nextInt(), parser.nextInt()) .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt()); position.setTime(dateBuilder.getDate()); position.setValid(parser.next().equals("A")); position.set(Event.KEY_SATELLITES, parser.next()); position.set(Event.KEY_GSM, parser.next()); position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble())); position.setCourse(parser.nextDouble()); position.set(Event.KEY_HDOP, parser.next()); position.setAltitude(parser.nextDouble()); position.set(Event.KEY_ODOMETER, parser.next()); position.set("runtime", parser.next()); position.set(Event.KEY_MCC, parser.nextInt()); position.set(Event.KEY_MNC, parser.nextInt()); position.set(Event.KEY_LAC, parser.nextInt(16)); position.set(Event.KEY_CID, parser.nextInt(16)); position.set(Event.KEY_STATUS, parser.next()); for (int i = 1; i <= 3; i++) { if (parser.hasNext()) { position.set(Event.PREFIX_ADC + i, parser.nextInt(16)); } } position.set(Event.KEY_BATTERY, parser.nextInt(16)); position.set(Event.KEY_POWER, parser.nextInt(16)); String eventData = parser.next(); if (eventData != null && !eventData.isEmpty()) { switch (event) { case 37: position.set(Event.KEY_RFID, eventData); break; default: position.set("event-data", eventData); break; } } if (parser.hasNext()) { String fuel = parser.next(); position.set(Event.KEY_FUEL, Integer.parseInt(fuel.substring(0, 2), 16) + Integer.parseInt(fuel.substring(2), 16) * 0.01); } return position; } private List<Position> decodeBinaryMessage(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) { List<Position> positions = new LinkedList<>(); String flag = buf.toString(2, 1, Charset.defaultCharset()); int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ','); String imei = buf.toString(index + 1, 15, Charset.defaultCharset()); if (!identify(imei, channel, remoteAddress)) { return null; } buf.skipBytes(index + 1 + 15 + 1 + 3 + 1 + 2 + 2 + 4); while (buf.readableBytes() >= 0x34) { Position position = new Position(); position.setProtocol(getProtocolName()); position.setDeviceId(getDeviceId()); position.set(Event.KEY_EVENT, buf.readUnsignedByte()); position.setLatitude(buf.readInt() * 0.000001); position.setLongitude(buf.readInt() * 0.000001); position.setTime(new Date((946684800 + buf.readUnsignedInt()) * 1000)); // 946684800 = 2000-01-01 position.setValid(buf.readUnsignedByte() == 1); position.set(Event.KEY_SATELLITES, buf.readUnsignedByte()); position.set(Event.KEY_GSM, buf.readUnsignedByte()); position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort())); position.setCourse(buf.readUnsignedShort()); position.set(Event.KEY_HDOP, buf.readUnsignedShort() * 0.1); position.setAltitude(buf.readUnsignedShort()); position.set(Event.KEY_ODOMETER, buf.readUnsignedInt()); position.set("runtime", buf.readUnsignedInt()); position.set(Event.KEY_MCC, buf.readUnsignedShort()); position.set(Event.KEY_MNC, buf.readUnsignedShort()); position.set(Event.KEY_LAC, buf.readUnsignedShort()); position.set(Event.KEY_CID, buf.readUnsignedShort()); position.set(Event.KEY_STATUS, buf.readUnsignedShort()); position.set(Event.PREFIX_ADC + 1, buf.readUnsignedShort()); position.set(Event.KEY_BATTERY, buf.readUnsignedShort() * 0.01); position.set(Event.KEY_POWER, buf.readUnsignedShort()); buf.readUnsignedInt(); // geo-fence positions.add(position); } if (channel != null) { StringBuilder command = new StringBuilder("@@"); command.append(flag).append(27 + positions.size() / 10).append(","); command.append(imei).append(",CCC,").append(positions.size()).append("*"); int checksum = 0; for (int i = 0; i < command.length(); i += 1) { checksum += command.charAt(i); } command.append(String.format("%02x", checksum & 0xff).toUpperCase()); command.append("\r\n"); channel.write(command.toString()); // delete processed data } return positions; } @Override protected Object decode( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { ChannelBuffer buf = (ChannelBuffer) msg; // Find type int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ','); index = buf.indexOf(index + 1, buf.writerIndex(), (byte) ','); String type = buf.toString(index + 1, 3, Charset.defaultCharset()); if (type.equals("CCC")) { return decodeBinaryMessage(channel, remoteAddress, buf); } else { return decodeRegularMessage(channel, remoteAddress, buf); } } }