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/*
* Copyright 2012 - 2016 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 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.DeviceSession;
import org.traccar.helper.Checksum;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.model.Position;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.regex.Pattern;
public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
public MeiligaoProtocolDecoder(MeiligaoProtocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.number("(dd)(dd)(dd).?(d+)?,") // time
.expression("([AV]),") // validity
.number("(d+)(dd.d+),") // latitude
.expression("([NS]),")
.number("(d+)(dd.d+),") // longitude
.expression("([EW]),")
.number("(d+.?d*)?,") // speed
.number("(d+.?d*)?,") // course
.number("(dd)(dd)(dd)") // date (ddmmyy)
.expression("[^\\|]*")
.groupBegin()
.number("|(d+.d+)?") // hdop
.number("|(-?d+.?d*)?") // altitude
.number("|(xxxx)?") // state
.groupBegin()
.number("|(xxxx),(xxxx)") // adc
.number("(?:,(xxxx),(xxxx),(xxxx),(xxxx),(xxxx),(xxxx))?")
.groupBegin()
.number("|x{16}") // cell
.number("|(xx)") // gsm
.number("|(x{8})") // odometer
.or()
.number("|(x{9})") // odometer
.groupBegin()
.number("|(x{5,})") // rfid
.groupEnd("?")
.groupEnd("?")
.groupEnd("?")
.groupEnd("?")
.any()
.compile();
private static final Pattern PATTERN_RFID = new PatternBuilder()
.number("|(dd)(dd)(dd),") // time
.number("(dd)(dd)(dd),") // Date (ddmmyy)
.number("(d+)(dd.d+),") // latitude
.expression("([NS]),")
.number("(d+)(dd.d+),") // longitude
.expression("([EW])")
.compile();
public static final int MSG_HEARTBEAT = 0x0001;
public static final int MSG_SERVER = 0x0002;
public static final int MSG_LOGIN = 0x5000;
public static final int MSG_LOGIN_RESPONSE = 0x4000;
public static final int MSG_POSITION = 0x9955;
public static final int MSG_POSITION_LOGGED = 0x9016;
public static final int MSG_ALARM = 0x9999;
public static final int MSG_RFID = 0x9966;
private DeviceSession identify(ChannelBuffer buf, Channel channel, SocketAddress remoteAddress) {
StringBuilder builder = new StringBuilder();
for (int i = 0; i < 7; i++) {
int b = buf.readUnsignedByte();
// First digit
int d1 = (b & 0xf0) >> 4;
if (d1 == 0xf) {
break;
}
builder.append(d1);
// Second digit
int d2 = b & 0x0f;
if (d2 == 0xf) {
break;
}
builder.append(d2);
}
String id = builder.toString();
if (id.length() == 14) {
return getDeviceSession(channel, remoteAddress, id, id + Checksum.luhn(Long.parseLong(id)));
} else {
return getDeviceSession(channel, remoteAddress, id);
}
}
private static void sendResponse(
Channel channel, SocketAddress remoteAddress, ChannelBuffer id, int type, ChannelBuffer msg) {
if (channel != null) {
ChannelBuffer buf = ChannelBuffers.buffer(
2 + 2 + id.readableBytes() + 2 + msg.readableBytes() + 2 + 2);
buf.writeByte('@');
buf.writeByte('@');
buf.writeShort(buf.capacity());
buf.writeBytes(id);
buf.writeShort(type);
buf.writeBytes(msg);
buf.writeShort(Checksum.crc16(Checksum.CRC16_CCITT_FALSE, buf.toByteBuffer()));
buf.writeByte('\r');
buf.writeByte('\n');
channel.write(buf, remoteAddress);
}
}
private String getMeiligaoServer(Channel channel) {
String server = Context.getConfig().getString(getProtocolName() + ".server");
if (server == null) {
InetSocketAddress address = (InetSocketAddress) channel.getLocalAddress();
server = address.getAddress().getHostAddress() + ":" + address.getPort();
}
return server;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.skipBytes(2); // header
buf.readShort(); // length
ChannelBuffer id = buf.readBytes(7);
int command = buf.readUnsignedShort();
ChannelBuffer response;
switch (command) {
case MSG_LOGIN:
if (channel != null) {
response = ChannelBuffers.wrappedBuffer(new byte[] {0x01});
sendResponse(channel, remoteAddress, id, MSG_LOGIN_RESPONSE, response);
}
return null;
case MSG_HEARTBEAT:
if (channel != null) {
response = ChannelBuffers.wrappedBuffer(new byte[] {0x01});
sendResponse(channel, remoteAddress, id, MSG_HEARTBEAT, response);
}
return null;
case MSG_SERVER:
if (channel != null) {
response = ChannelBuffers.copiedBuffer(
getMeiligaoServer(channel), StandardCharsets.US_ASCII);
sendResponse(channel, remoteAddress, id, MSG_SERVER, response);
}
return null;
case MSG_POSITION:
case MSG_POSITION_LOGGED:
case MSG_ALARM:
case MSG_RFID:
break;
default:
return null;
}
Position position = new Position();
position.setProtocol(getProtocolName());
// Custom data
if (command == MSG_ALARM) {
position.set(Position.KEY_ALARM, buf.readUnsignedByte());
} else if (command == MSG_POSITION_LOGGED) {
buf.skipBytes(6);
}
DeviceSession deviceSession = identify(id, channel, remoteAddress);
if (deviceSession == null) {
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
if (command == MSG_RFID) {
for (int i = 0; i < 15; i++) {
long rfid = buf.readUnsignedInt();
if (rfid != 0) {
String card = String.format("%010d", rfid);
position.set("card" + (i + 1), card);
position.set(Position.KEY_RFID, card);
}
}
}
Pattern pattern;
if (command == MSG_RFID) {
pattern = PATTERN_RFID;
} else {
pattern = PATTERN;
}
Parser parser = new Parser(
pattern, buf.toString(buf.readerIndex(), buf.readableBytes() - 4, StandardCharsets.US_ASCII));
if (!parser.matches()) {
return null;
}
if (command == MSG_RFID) {
DateBuilder dateBuilder = new DateBuilder()
.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt())
.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
position.setTime(dateBuilder.getDate());
position.setValid(true);
position.setLatitude(parser.nextCoordinate());
position.setLongitude(parser.nextCoordinate());
} else {
DateBuilder dateBuilder = new DateBuilder()
.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
if (parser.hasNext()) {
dateBuilder.setMillis(parser.nextInt());
}
position.setValid(parser.next().equals("A"));
position.setLatitude(parser.nextCoordinate());
position.setLongitude(parser.nextCoordinate());
if (parser.hasNext()) {
position.setSpeed(parser.nextDouble());
}
if (parser.hasNext()) {
position.setCourse(parser.nextDouble());
}
dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
position.setTime(dateBuilder.getDate());
position.set(Position.KEY_HDOP, parser.next());
if (parser.hasNext()) {
position.setAltitude(parser.nextDouble());
}
position.set(Position.KEY_STATUS, parser.next());
for (int i = 1; i <= 8; i++) {
if (parser.hasNext()) {
position.set(Position.PREFIX_ADC + i, parser.nextInt(16));
}
}
if (parser.hasNext()) {
position.set(Position.KEY_GSM, parser.nextInt(16));
}
if (parser.hasNext()) {
position.set(Position.KEY_ODOMETER, parser.nextLong(16));
}
if (parser.hasNext()) {
position.set(Position.KEY_ODOMETER, parser.nextLong(16));
}
if (parser.hasNext()) {
position.set(Position.KEY_RFID, parser.nextInt(16));
}
}
return position;
}
}
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