/* * Copyright 2012 - 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.charset.Charset; import java.net.SocketAddress; import java.util.Calendar; import java.util.Date; import java.util.LinkedList; import java.util.List; import java.util.TimeZone; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.jboss.netty.buffer.ChannelBuffer; import org.jboss.netty.channel.Channel; import org.jboss.netty.channel.ChannelHandlerContext; import org.traccar.BaseProtocolDecoder; import org.traccar.helper.ChannelBufferTools; 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 = Pattern.compile( "\\$\\$." + // Flag "\\d+," + // Length "(\\d+)," + // IMEI "\\p{XDigit}{3}," + // Command "(?:\\d+,)?" + "(\\d+)," + // Event "(-?\\d+\\.\\d+)," + // Latitude "(-?\\d+\\.\\d+)," + // Longitude "(\\d{2})(\\d{2})(\\d{2})" + // Date (YYMMDD) "(\\d{2})(\\d{2})(\\d{2})," + // Time (HHMMSS) "([AV])," + // Validity "(\\d+)," + // Satellites "(\\d+)," + // GSM Signal "(\\d+\\.?\\d*)," + // Speed "(\\d+)," + // Course "(\\d+\\.?\\d*)," + // HDOP "(-?\\d+)," + // Altitude "(\\d+)," + // Odometer "(\\d+)," + // Runtime "(\\d+\\|\\d+\\|\\p{XDigit}+\\|\\p{XDigit}+)," + // Cell "(\\p{XDigit}+)," + // State "(\\p{XDigit}+)?\\|" + // ADC1 "(\\p{XDigit}+)?\\|" + // ADC2 "(\\p{XDigit}+)?\\|" + // ADC3 "(\\p{XDigit}+)\\|" + // Battery "(\\p{XDigit}+)," + // Power "(?:([^,]+)?," + // Event Specific "[^,]*," + // Reserved "\\d*," + // Protocol "(\\p{XDigit}{4})?)?" + // Fuel ".*\\*\\p{XDigit}{2}(?:\r\n)?"); private Position decodeRegularMessage(Channel channel, ChannelBuffer buf) { // Parse message String sentence = buf.toString(Charset.defaultCharset()); Matcher parser = pattern.matcher(sentence); if (!parser.matches()) { return null; } // Create new position Position position = new Position(); position.setProtocol(getProtocolName()); Integer index = 1; // Identification if (!identify(parser.group(index++), channel)) { return null; } position.setDeviceId(getDeviceId()); // Event int event = Integer.valueOf(parser.group(index++)); position.set(Event.KEY_EVENT, event); // Coordinates position.setLatitude(Double.valueOf(parser.group(index++))); position.setLongitude(Double.valueOf(parser.group(index++))); // Time Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC")); time.clear(); time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++))); time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1); time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++))); time.set(Calendar.HOUR_OF_DAY, Integer.valueOf(parser.group(index++))); time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++))); time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++))); position.setTime(time.getTime()); // Validity position.setValid(parser.group(index++).compareTo("A") == 0); // Satellites position.set(Event.KEY_SATELLITES, parser.group(index++)); // GSM Signal position.set(Event.KEY_GSM, parser.group(index++)); // Speed position.setSpeed(UnitsConverter.knotsFromKph(Double.valueOf(parser.group(index++)))); // Course position.setCourse(Double.valueOf(parser.group(index++))); // HDOP position.set(Event.KEY_HDOP, parser.group(index++)); // Altitude position.setAltitude(Double.valueOf(parser.group(index++))); // Other position.set(Event.KEY_ODOMETER, parser.group(index++)); position.set("runtime", parser.group(index++)); position.set(Event.KEY_CELL, parser.group(index++)); position.set(Event.KEY_STATUS, parser.group(index++)); // ADC String adc1 = parser.group(index++); if (adc1 != null) { position.set(Event.PREFIX_ADC + 1, Integer.parseInt(adc1, 16)); } String adc2 = parser.group(index++); if (adc2 != null) { position.set(Event.PREFIX_ADC + 2, Integer.parseInt(adc2, 16)); } String adc3 = parser.group(index++); if (adc3 != null) { position.set(Event.PREFIX_ADC + 3, Integer.parseInt(adc3, 16)); } position.set(Event.KEY_BATTERY, Integer.parseInt(parser.group(index++), 16)); position.set(Event.KEY_POWER, Integer.parseInt(parser.group(index++), 16)); // Event specific String data = parser.group(index++); if (data != null && !data.isEmpty()) { switch (event) { case 37: position.set(Event.KEY_RFID, data); break; } } // Fuel String fuel = parser.group(index++); if (fuel != null) { 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, ChannelBuffer buf) { List<Position> positions = new LinkedList<>(); String flag = buf.toString(2, 1, Charset.defaultCharset()); int index = ChannelBufferTools.find(buf, 0, buf.readableBytes(), ","); // Identification String imei = buf.toString(index + 1, 15, Charset.defaultCharset()); if (!identify(imei, channel)) { 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()); // Event position.set(Event.KEY_EVENT, buf.readUnsignedByte()); // Location position.setLatitude(buf.readInt() * 0.000001); position.setLongitude(buf.readInt() * 0.000001); // Time (946684800 - timestamp for 2000-01-01) position.setTime(new Date((946684800 + buf.readUnsignedInt()) * 1000)); // Validity position.setValid(buf.readUnsignedByte() == 1); // Satellites position.set(Event.KEY_SATELLITES, buf.readUnsignedByte()); // GSM Signal position.set(Event.KEY_GSM, buf.readUnsignedByte()); // Speed position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort())); // Course position.setCourse(buf.readUnsignedShort()); // HDOP position.set(Event.KEY_HDOP, buf.readUnsignedShort() * 0.1); // Altitude position.setAltitude(buf.readUnsignedShort()); // Other position.set(Event.KEY_ODOMETER, buf.readUnsignedInt()); position.set("runtime", buf.readUnsignedInt()); position.set(Event.KEY_CELL, buf.readUnsignedShort() + "|" + buf.readUnsignedShort() + "|" + buf.readUnsignedShort() + "|" + buf.readUnsignedShort()); position.set(Event.KEY_STATUS, buf.readUnsignedShort()); // ADC 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); } // Delete recorded data 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\r\n", checksum & 0xff).toUpperCase()); channel.write(command.toString()); } return positions; } @Override protected Object decode( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { ChannelBuffer buf = (ChannelBuffer) msg; // Find type Integer index = ChannelBufferTools.find(buf, 0, buf.readableBytes(), ","); index = ChannelBufferTools.find(buf, index + 1, buf.readableBytes(), ","); String type = buf.toString(index + 1, 3, Charset.defaultCharset()); if (type.equals("CCC")) { return decodeBinaryMessage(channel, buf); } else { return decodeRegularMessage(channel, buf); } } }