/* * 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.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.ServerManager; import org.traccar.helper.ChannelBufferTools; import org.traccar.helper.Log; import org.traccar.model.ExtendedInfoFormatter; import org.traccar.model.Position; public class MeitrackProtocolDecoder extends BaseProtocolDecoder { public MeitrackProtocolDecoder(ServerManager serverManager) { super(serverManager); } private static final Pattern pattern = Pattern.compile( "\\$\\$." + // Flag "\\d+," + // Length "(\\d+)," + // IMEI "\\p{XDigit}{3}," + // Command "(\\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+)," + // Speed "(\\d+)," + // Course "(\\d+\\.?\\d*)," + // HDOP "(-?\\d+)," + // Altitude "(\\d+)," + // Milage "(\\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 ".*(\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(); ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter("meitrack"); Integer index = 1; // Identification String imei = parser.group(index++); try { position.setDeviceId(getDataManager().getDeviceByImei(imei).getId()); } catch(Exception error) { Log.warning("Unknown device - " + imei); return null; } // Event extendedInfo.set("event", parser.group(index++)); // 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 extendedInfo.set("satellites", parser.group(index++)); // GSM Signal extendedInfo.set("gsm", parser.group(index++)); // Speed position.setSpeed(Double.valueOf(parser.group(index++)) * 0.539957); // Course position.setCourse(Double.valueOf(parser.group(index++))); // HDOP extendedInfo.set("hdop", parser.group(index++)); // Altitude position.setAltitude(Double.valueOf(parser.group(index++))); // Other extendedInfo.set("milage", parser.group(index++)); extendedInfo.set("runtime", parser.group(index++)); extendedInfo.set("cell", parser.group(index++)); extendedInfo.set("state", parser.group(index++)); // ADC extendedInfo.set("adc1", Integer.parseInt(parser.group(index++), 16)); extendedInfo.set("adc2", Integer.parseInt(parser.group(index++), 16)); String adc3 = parser.group(index++); if (adc3 != null) { extendedInfo.set("adc3", Integer.parseInt(adc3, 16)); } extendedInfo.set("battery", Integer.parseInt(parser.group(index++), 16)); extendedInfo.set("power", Integer.parseInt(parser.group(index++), 16)); // Extended info position.setExtendedInfo(extendedInfo.toString()); return position; } private List<Position> decodeBinaryMessage(Channel channel, ChannelBuffer buf) { List<Position> positions = new LinkedList<Position>(); String flag = buf.toString(2, 1, Charset.defaultCharset()); int index = ChannelBufferTools.find(buf, 0, buf.readableBytes(), ","); // Identification long deviceId; String imei = buf.toString(index + 1, 15, Charset.defaultCharset()); try { deviceId = getDataManager().getDeviceByImei(imei).getId(); } catch(Exception error) { Log.warning("Unknown device - " + imei); return null; } buf.skipBytes(index + 1 + 15 + 1 + 3 + 1 + 2 + 2 + 4); while (buf.readableBytes() >= 0x34) { Position position = new Position(); ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter("meitrack"); position.setDeviceId(deviceId); // Event extendedInfo.set("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 extendedInfo.set("satellites", buf.readUnsignedByte()); // GSM Signal extendedInfo.set("gsm", buf.readUnsignedByte()); // Speed position.setSpeed(buf.readUnsignedShort() * 0.539957); // Course position.setCourse((double) buf.readUnsignedShort()); // HDOP extendedInfo.set("hdop", buf.readUnsignedShort() * 0.1); // Altitude position.setAltitude((double) buf.readUnsignedShort()); // Other extendedInfo.set("milage", buf.readUnsignedInt()); extendedInfo.set("runtime", buf.readUnsignedInt()); extendedInfo.set("cell", buf.readUnsignedShort() + "|" + buf.readUnsignedShort() + "|" + buf.readUnsignedShort() + "|" + buf.readUnsignedShort()); extendedInfo.set("state", buf.readUnsignedShort()); // ADC extendedInfo.set("adc1", buf.readUnsignedShort()); extendedInfo.set("battery", buf.readUnsignedShort() * 0.01); extendedInfo.set("power", buf.readUnsignedShort()); buf.readUnsignedInt(); // geo-fence position.setExtendedInfo(extendedInfo.toString()); 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( ChannelHandlerContext ctx, Channel channel, 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); } } }