/* * Copyright 2013 - 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 org.jboss.netty.buffer.ChannelBuffer; import org.jboss.netty.buffer.ChannelBuffers; import org.jboss.netty.channel.Channel; import org.traccar.BaseProtocolDecoder; import org.traccar.Context; import org.traccar.helper.DateBuilder; import org.traccar.helper.UnitsConverter; import org.traccar.model.Event; import org.traccar.model.Position; public class AtrackProtocolDecoder extends BaseProtocolDecoder { private static final int MIN_DATA_LENGTH = 40; private boolean longDate; private boolean custom; private String form; public AtrackProtocolDecoder(AtrackProtocol protocol) { super(protocol); longDate = Context.getConfig().getBoolean(getProtocolName() + ".longDate"); custom = Context.getConfig().getBoolean(getProtocolName() + ".custom"); form = Context.getConfig().getString(getProtocolName() + ".form"); if (form != null) { custom = true; } } public void setLongDate(boolean longDate) { this.longDate = longDate; } public void setCustom(boolean custom) { this.custom = custom; } private static void sendResponse(Channel channel, SocketAddress remoteAddress, long rawId, int index) { if (channel != null) { ChannelBuffer response = ChannelBuffers.directBuffer(12); response.writeShort(0xfe02); response.writeLong(rawId); response.writeShort(index); channel.write(response, remoteAddress); } } private static String readString(ChannelBuffer buf) { String result = null; int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0); if (index > buf.readerIndex()) { result = buf.readBytes(index - buf.readerIndex()).toString(Charset.defaultCharset()); } buf.readByte(); return result; } private void readCustomData(Position position, ChannelBuffer buf, String form) { String[] keys = form.substring(1).split("%"); for (String key : keys) { switch (key) { case "SA": position.set(Event.KEY_SATELLITES, buf.readUnsignedByte()); break; case "MV": position.set(Event.KEY_POWER, buf.readUnsignedShort()); break; case "BV": position.set(Event.KEY_BATTERY, buf.readUnsignedShort()); break; case "GQ": position.set(Event.KEY_GSM, buf.readUnsignedByte()); break; case "CE": position.set(Event.KEY_CID, buf.readUnsignedInt()); break; case "LC": position.set(Event.KEY_LAC, buf.readUnsignedShort()); break; case "CN": buf.readUnsignedInt(); // mcc + mnc break; case "RL": buf.readUnsignedByte(); // rxlev break; case "PC": buf.readUnsignedInt(); // pulse count break; case "AT": position.setAltitude(buf.readUnsignedInt()); break; case "RP": position.set(Event.KEY_RPM, buf.readUnsignedShort()); break; case "GS": buf.readUnsignedByte(); // gsm status break; case "DT": position.set(Event.KEY_ARCHIVE, buf.readUnsignedByte() == 1); break; case "VN": position.set(Event.KEY_VIN, readString(buf)); break; case "MF": buf.readUnsignedShort(); // mass air flow rate break; case "EL": buf.readUnsignedByte(); // engine load break; case "TR": buf.readUnsignedByte(); // throttle position break; case "ET": buf.readUnsignedShort(); // engine coolant temp break; case "FL": position.set(Event.KEY_FUEL, buf.readUnsignedByte()); break; case "ML": buf.readUnsignedByte(); // mil status break; case "FC": buf.readUnsignedInt(); // fuel used break; case "CI": readString(buf); // format string break; case "AV1": position.set(Event.PREFIX_ADC + 1, buf.readUnsignedShort()); break; case "NC": readString(buf); // gsm neighbor cell info break; case "SM": buf.readUnsignedShort(); // max speed between reports break; case "GL": readString(buf); // google link break; case "MA": readString(buf); // mac address break; default: break; } } } @Override protected Object decode( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { ChannelBuffer buf = (ChannelBuffer) msg; if (buf.getUnsignedShort(buf.readerIndex()) == 0xfe02) { if (channel != null) { channel.write(buf, remoteAddress); // keep-alive message } return null; } buf.skipBytes(2); // prefix buf.readUnsignedShort(); // checksum buf.readUnsignedShort(); // length int index = buf.readUnsignedShort(); long id = buf.readLong(); if (!identify(String.valueOf(id), channel, remoteAddress)) { return null; } sendResponse(channel, remoteAddress, id, index); List<Position> positions = new LinkedList<>(); while (buf.readableBytes() >= MIN_DATA_LENGTH) { Position position = new Position(); position.setProtocol(getProtocolName()); position.setDeviceId(getDeviceId()); if (longDate) { DateBuilder dateBuilder = new DateBuilder() .setDate(buf.readUnsignedShort(), buf.readUnsignedByte(), buf.readUnsignedByte()) .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()); position.setTime(dateBuilder.getDate()); buf.skipBytes(7 + 7); } else { position.setFixTime(new Date(buf.readUnsignedInt() * 1000)); position.setDeviceTime(new Date(buf.readUnsignedInt() * 1000)); buf.readUnsignedInt(); // send time } position.setValid(true); position.setLongitude(buf.readInt() * 0.000001); position.setLatitude(buf.readInt() * 0.000001); position.setCourse(buf.readUnsignedShort()); position.set(Event.KEY_TYPE, buf.readUnsignedByte()); position.set(Event.KEY_ODOMETER, buf.readUnsignedInt() * 0.1); position.set(Event.KEY_HDOP, buf.readUnsignedShort() * 0.1); position.set(Event.KEY_INPUT, buf.readUnsignedByte()); position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort())); position.set(Event.KEY_OUTPUT, buf.readUnsignedByte()); position.set(Event.PREFIX_ADC + 1, buf.readUnsignedShort() * 0.001); position.set("driver", readString(buf)); position.set(Event.PREFIX_TEMP + 1, buf.readShort() * 0.1); position.set(Event.PREFIX_TEMP + 2, buf.readShort() * 0.1); position.set("message", readString(buf)); if (custom) { String form = this.form; if (form == null) { form = readString(buf).substring("%CI".length()); } readCustomData(position, buf, form); } positions.add(position); } return positions; } }