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/*
* Copyright 2012 - 2017 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 org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.helper.BitUtil;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.Date;
public class AdmProtocolDecoder extends BaseProtocolDecoder {
public AdmProtocolDecoder(AdmProtocol protocol) {
super(protocol);
}
public static final int CMD_RESPONSE_SIZE = 0x84;
public static final int MSG_IMEI = 0x03;
public static final int MSG_PHOTO = 0x0A;
public static final int MSG_ADM5 = 0x01;
private Position parseData(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf, int type) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession == null) {
return null;
}
if (BitUtil.to(type, 2) == 0) {
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
position.set(Position.KEY_INDEX, buf.readUnsignedShort());
int status = buf.readUnsignedShort();
position.set(Position.KEY_STATUS, status);
position.setValid(!BitUtil.check(status, 5));
position.setLatitude(buf.readFloat());
position.setLongitude(buf.readFloat());
position.setCourse(buf.readUnsignedShort() * 0.1);
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort() * 0.1));
position.set(Position.KEY_ACCELERATION, buf.readUnsignedByte() * 0.1);
position.setAltitude(buf.readUnsignedShort());
position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
position.set(Position.KEY_SATELLITES, buf.readUnsignedByte() & 0x0f);
position.setTime(new Date(buf.readUnsignedInt() * 1000));
position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.001);
position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
if (BitUtil.check(type, 2)) {
buf.skipBytes(2); // vib, vib_count
int out = buf.readUnsignedByte();
for (int i = 0; i <= 3; ++i) {
position.set(Position.PREFIX_OUT + (i + 1), BitUtil.check(out, i) ? 1 : 0);
}
buf.skipBytes(1); // in_alarm
}
if (BitUtil.check(type, 3)) {
for (int i = 1; i <= 6; ++i) {
position.set(Position.PREFIX_ADC + i, buf.readUnsignedShort() * 0.001);
}
}
if (BitUtil.check(type, 4)) {
for (int i = 1; i <= 2; ++i) {
position.set(Position.PREFIX_COUNT + i, buf.readUnsignedInt());
}
}
if (BitUtil.check(type, 5)) {
buf.skipBytes(6); // fuel level 0..2
for (int i = 1; i <= 3; ++i) {
position.set(Position.PREFIX_TEMP + i, buf.readUnsignedByte());
}
}
if (BitUtil.check(type, 6)) {
buf.skipBytes(buf.getUnsignedByte(buf.readerIndex()));
}
if (BitUtil.check(type, 7)) {
position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
}
return position;
}
return null;
}
private Position parseCommandResponse(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession == null) {
return null;
}
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, null);
position.set(Position.KEY_RESULT, buf.readBytes(129).toString(StandardCharsets.UTF_8));
return position;
}
@Override
protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.readUnsignedShort(); // device id
int size = buf.readUnsignedByte();
if (size != CMD_RESPONSE_SIZE) {
int type = buf.readUnsignedByte();
if (type == MSG_IMEI) {
getDeviceSession(channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.UTF_8));
} else {
return parseData(channel, remoteAddress, buf, type);
}
} else {
return parseCommandResponse(channel, remoteAddress, buf);
}
return null;
}
}
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