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/*
* Copyright 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 org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.helper.BcdUtil;
import org.traccar.helper.BitUtil;
import org.traccar.helper.Checksum;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.TimeZone;
public class HuabaoProtocolDecoder extends BaseProtocolDecoder {
public HuabaoProtocolDecoder(HuabaoProtocol protocol) {
super(protocol);
}
public static final int MSG_GENERAL_RESPONSE = 0x8001;
public static final int MSG_TERMINAL_REGISTER = 0x0100;
public static final int MSG_TERMINAL_REGISTER_RESPONSE = 0x8100;
public static final int MSG_TERMINAL_AUTH = 0x0102;
public static final int MSG_LOCATION_REPORT = 0x0200;
public static final int RESULT_SUCCESS = 0;
private void sendResponse(
Channel channel, SocketAddress remoteAddress, int type, ChannelBuffer id, ChannelBuffer data) {
ChannelBuffer response = ChannelBuffers.dynamicBuffer();
response.writeByte(0x7e);
response.writeShort(type);
response.writeShort(data.readableBytes());
response.writeBytes(id);
response.writeShort(1); // index
response.writeBytes(data);
response.writeByte(Checksum.xor(response.toByteBuffer(1, response.readableBytes() - 1)));
response.writeByte(0x7e);
if (channel != null) {
channel.write(response, remoteAddress);
}
}
private void sendGeneralResponse(
Channel channel, SocketAddress remoteAddress, ChannelBuffer id, int type, int index) {
ChannelBuffer response = ChannelBuffers.dynamicBuffer();
response.writeShort(index);
response.writeShort(type);
response.writeByte(RESULT_SUCCESS);
sendResponse(channel, remoteAddress, MSG_GENERAL_RESPONSE, id, response);
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.readUnsignedByte(); // start marker
int type = buf.readUnsignedShort();
buf.readUnsignedShort(); // body length
ChannelBuffer id = buf.readBytes(6); // phone number
int index = buf.readUnsignedShort();
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, ChannelBuffers.hexDump(id));
if (deviceSession == null) {
return null;
}
if (type == MSG_TERMINAL_REGISTER) {
ChannelBuffer response = ChannelBuffers.dynamicBuffer();
response.writeShort(index);
response.writeByte(RESULT_SUCCESS);
response.writeBytes("authentication".getBytes(StandardCharsets.US_ASCII));
sendResponse(channel, remoteAddress, MSG_TERMINAL_REGISTER_RESPONSE, id, response);
} else if (type == MSG_TERMINAL_AUTH) {
sendGeneralResponse(channel, remoteAddress, id, type, index);
} else if (type == MSG_LOCATION_REPORT) {
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_ALARM, buf.readUnsignedInt());
int flags = buf.readInt();
position.set(Position.KEY_IGNITION, BitUtil.check(flags, 0));
position.setValid(BitUtil.check(flags, 1));
double lat = buf.readUnsignedInt() * 0.000001;
double lon = buf.readUnsignedInt() * 0.000001;
if (BitUtil.check(flags, 2)) {
position.setLatitude(-lat);
} else {
position.setLatitude(lat);
}
if (BitUtil.check(flags, 3)) {
position.setLongitude(-lon);
} else {
position.setLongitude(lon);
}
position.setAltitude(buf.readShort());
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort() * 0.1));
position.setCourse(buf.readUnsignedShort());
DateBuilder dateBuilder = new DateBuilder(TimeZone.getTimeZone("GMT+8"))
.setYear(BcdUtil.readInteger(buf, 2))
.setMonth(BcdUtil.readInteger(buf, 2))
.setDay(BcdUtil.readInteger(buf, 2))
.setHour(BcdUtil.readInteger(buf, 2))
.setMinute(BcdUtil.readInteger(buf, 2))
.setSecond(BcdUtil.readInteger(buf, 2));
position.setTime(dateBuilder.getDate());
// additional information
return position;
}
return null;
}
}
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