/* * Copyright 2023 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 io.netty.handler.codec.http.FullHttpRequest; import io.netty.handler.codec.http.HttpResponseStatus; import io.netty.handler.codec.http.QueryStringDecoder; import org.traccar.BaseHttpProtocolDecoder; import org.traccar.Protocol; 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 org.traccar.session.DeviceSession; import java.net.SocketAddress; import java.nio.charset.StandardCharsets; import java.util.LinkedList; import java.util.List; import java.util.regex.Pattern; public class VltProtocolDecoder extends BaseHttpProtocolDecoder { public VltProtocolDecoder(Protocol protocol) { super(protocol); } private static final Pattern PATTERN = new PatternBuilder() .number("(dd)") // alert id .expression("([HL])") // history .number("([01])") // validity .number("(dd)(dd)(dd)") // date (ddmmyy) .number("(dd)(dd)(dd)") // time (hhmmss) .number("(d{3}.d{6})([NS])") // latitude .number("(d{3}.d{6})([EW])") // longitude .number("(d{3})") // mcc .expression("(x*[0-9]+)") // mnc .number("(x{4})") // lac .number("(d{9})") // cid .number("(d{3}.d{2})") // speed .number("(d{3}.d{2})") // course .number("(d{2})") // satellites .number("(d{2})") // hdop .number("(d{2})") // rssi .number("([01])") // ignition .number("([01])") // charging .expression("([HMS])") // vehicle mode .compile(); private Position decodePosition(DeviceSession deviceSession, String sentence) { Parser parser = new Parser(PATTERN, sentence); if (!parser.matches()) { return null; } Position position = new Position(getProtocolName()); position.setDeviceId(deviceSession.getDeviceId()); position.set(Position.KEY_EVENT, parser.nextInt()); position.set(Position.KEY_ARCHIVE, parser.next().equals("H") ? true : null); position.setValid(parser.nextInt() > 0); position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS)); position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM)); position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM)); int mcc = parser.nextInt(); int mnc = Integer.parseInt(parser.next().replaceAll("x", "")); int lac = parser.nextHexInt(); int cid = parser.nextInt(); position.setSpeed(parser.nextDouble()); position.setCourse(parser.nextDouble()); position.set(Position.KEY_SATELLITES, parser.nextInt()); position.set(Position.KEY_HDOP, parser.nextInt()); position.setNetwork(new Network(CellTower.from(mcc, mnc, lac, cid, parser.nextInt()))); position.set(Position.KEY_IGNITION, parser.nextInt() > 0); position.set(Position.KEY_CHARGE, parser.nextInt() > 0); position.set(Position.KEY_MOTION, parser.next().equals("M")); return position; } @Override protected Object decode( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { FullHttpRequest request = (FullHttpRequest) msg; QueryStringDecoder decoder = new QueryStringDecoder( request.content().toString(StandardCharsets.US_ASCII), false); String sentence = decoder.parameters().get("vltdata").iterator().next(); int index = 0; String type = sentence.substring(index, index += 3); String imei = sentence.substring(index, index += 15); DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei); if (deviceSession == null) { sendResponse(channel, HttpResponseStatus.BAD_REQUEST); return null; } sendResponse(channel, HttpResponseStatus.OK); switch (type) { case "NRM": return decodePosition(deviceSession, sentence.substring(3 + 15)); case "BTH": List<Position> positions = new LinkedList<>(); int count = Integer.parseInt(sentence.substring(index, index += 3)); for (int i = 0; i < count; i++) { positions.add(decodePosition(deviceSession, sentence.substring(index, index += 78))); } return positions; default: return null; } } }