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/*
* Copyright 2013 - 2019 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 io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.Context;
import org.traccar.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.Checksum;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.regex.Pattern;
public class LaipacProtocolDecoder extends BaseProtocolDecoder {
public LaipacProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final String DEFAULT_DEVICE_PASSWORD = "00000000";
private static final Pattern PATTERN_ECHK = new PatternBuilder()
.text("$ECHK")
.expression(",([^,]+)") // identifier
.number(",(d+)") // sequence number
.text("*")
.number("(xx)") // checksum
.compile();
private static final Pattern PATTERN_AVRMC = new PatternBuilder()
.text("$AVRMC,")
.expression("([^,]+),") // identifier
.number("(dd)(dd)(dd),") // time (hhmmss)
.expression("([AVRPavrp]),") // validity
.number("(dd)(dd.d+),") // latitude
.expression("([NS]),") // latitude hemisphere
.number("(ddd)(dd.d+),") // longitude
.number("([EW]),") // longitude hemisphere
.number("(d+.d+),") // speed
.number("(d+.d+),") // course
.number("(dd)(dd)(dd),") // date (ddmmyy)
.expression("([0-9A-Za-z]),") // event code
.expression("([\\d.]+),") // battery voltage
.number("(d+),") // current mileage
.number("(d),") // gps status
.number("(d+),") // adc1
.number("(d+)") // adc2
.number(",(xxxx|x)") // lac | lac+cid = 0
.number("(xxxx),") // cid | nothing
.number("(ddd|d)") // mcc | mcc+mnc = 0
.number("(ddd)") // mnc | nothing
.optional(4)
.expression(",([^*]*)") // anything remaining (be forward compatible)
.optional(1)
.text("*")
.number("(xx)") // checksum
.compile();
private String decodeAlarm(String event) {
switch (event) {
case "Z":
return Position.ALARM_LOW_BATTERY;
case "Y":
return Position.ALARM_TOW;
case "X":
return Position.ALARM_GEOFENCE_ENTER;
case "T":
return Position.ALARM_TAMPERING;
case "H":
return Position.ALARM_POWER_OFF;
case "8":
return Position.ALARM_SHOCK;
case "7":
case "4":
return Position.ALARM_GEOFENCE_EXIT;
case "6":
return Position.ALARM_OVERSPEED;
case "5":
return Position.ALARM_POWER_CUT;
case "3":
return Position.ALARM_SOS;
default:
return null;
}
}
private String decodeEvent(String event, Position position) {
if (event.length() == 1) {
char inputStatus = event.charAt(0);
if (inputStatus >= 'A' && inputStatus <= 'D') {
int inputStatusInt = inputStatus - 'A';
position.set(Position.PREFIX_IN + 1, inputStatusInt & 1);
position.set(Position.PREFIX_IN + 2, inputStatusInt & 2);
position.set(Position.KEY_IGNITION, ((inputStatusInt & 1) != 0) ? true : false);
return null;
}
}
return event;
}
private void sendEventResponse(
String event, String devicePassword, Channel channel, SocketAddress remoteAddress) {
String responseCode = null;
switch (event) {
case "3":
responseCode = "d";
break;
case "S":
case "T":
responseCode = "t";
break;
case "X":
case "4":
responseCode = "x";
break;
case "Y":
responseCode = "y";
break;
case "Z":
responseCode = "z";
break;
default:
break;
}
if (responseCode != null) {
String response = "$AVCFG," + devicePassword + "," + responseCode;
response += Checksum.nmea(response) + "\r\n";
channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
}
}
private void sendAcknowledge(
String status, String event, String checksum, Channel channel, SocketAddress remoteAddress) {
if (Character.isLowerCase(status.charAt(0))) {
String response = "$EAVACK," + event + "," + checksum;
response += Checksum.nmea(response) + "\r\n";
channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
}
}
private Object decodeEchk(
String sentence, Channel channel, SocketAddress remoteAddress) {
Parser parser = new Parser(PATTERN_ECHK, sentence);
if (!parser.matches()) {
return null;
}
if (channel != null) {
channel.writeAndFlush(new NetworkMessage(sentence + "\r\n", remoteAddress));
}
return null;
}
protected Object decodeAvrmc(
String sentence, Channel channel, SocketAddress remoteAddress) {
Parser parser = new Parser(PATTERN_AVRMC, sentence);
if (!parser.matches()) {
return null;
}
DeviceSession deviceSession =
getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
DateBuilder dateBuilder = new DateBuilder()
.setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
String status = parser.next();
String upperCaseStatus = status.toUpperCase();
position.setValid(upperCaseStatus.equals("A") || upperCaseStatus.equals("R") || upperCaseStatus.equals("P"));
position.set(Position.KEY_STATUS, status);
position.setLatitude(parser.nextCoordinate());
position.setLongitude(parser.nextCoordinate());
position.setSpeed(parser.nextDouble(0));
position.setCourse(parser.nextDouble(0));
dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
position.setTime(dateBuilder.getDate());
String event = parser.next();
position.set(Position.KEY_ALARM, decodeAlarm(event));
position.set(Position.KEY_EVENT, decodeEvent(event, position));
position.set(Position.KEY_BATTERY, Double.parseDouble(parser.next().replaceAll("\\.", "")) * 0.001);
position.set(Position.KEY_ODOMETER, parser.nextDouble());
position.set(Position.KEY_GPS, parser.nextInt());
position.set(Position.PREFIX_ADC + 1, parser.nextDouble() * 0.001);
position.set(Position.PREFIX_ADC + 2, parser.nextDouble() * 0.001);
Integer lac = parser.nextHexInt();
Integer cid = parser.nextHexInt();
Integer mcc = parser.nextInt();
Integer mnc = parser.nextInt();
if (lac != null && cid != null && mcc != null && mnc != null) {
position.setNetwork(new Network(CellTower.from(mcc, mnc, lac, cid)));
}
String unused = parser.next();
String checksum = parser.next();
if (channel != null) {
sendAcknowledge(status, event, checksum, channel, remoteAddress);
String devicePassword = Context.getIdentityManager()
.getDevicePassword(deviceSession.getDeviceId(), DEFAULT_DEVICE_PASSWORD);
sendEventResponse(event, devicePassword, channel, remoteAddress);
}
return position;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
if (sentence.startsWith("$ECHK")) {
return decodeEchk(sentence, channel, remoteAddress);
}
if (sentence.startsWith("$AVRMC")) {
return decodeAvrmc(sentence, channel, remoteAddress);
}
return null;
}
}
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