/* * Copyright 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.helper.BitUtil; 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.LinkedList; import java.util.List; public class AstraProtocolDecoder extends BaseProtocolDecoder { public AstraProtocolDecoder(AstraProtocol protocol) { super(protocol); } public static final int MSG_HEARTBEAT = 0x1A; public static final int MSG_DATA = 0x10; @Override protected Object decode( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { ChannelBuffer buf = (ChannelBuffer) msg; if (channel != null) { channel.write(ChannelBuffers.wrappedBuffer(new byte[] {0x06}), remoteAddress); } buf.readUnsignedByte(); // protocol buf.readUnsignedShort(); // length String imei = String.format("%08d", buf.readUnsignedInt()) + String.format("%07d", buf.readUnsignedMedium()); if (!identify(imei, channel, remoteAddress)) { return null; } List<Position> positions = new LinkedList<>(); while (buf.readableBytes() > 2) { Position position = new Position(); position.setProtocol(getProtocolName()); position.setDeviceId(getDeviceId()); buf.readUnsignedByte(); // index position.setLatitude(buf.readInt() * 0.000001); position.setLongitude(buf.readInt() * 0.000001); DateBuilder dateBuilder = new DateBuilder() .setDate(1980, 1, 6).addMillis(buf.readUnsignedInt() * 1000L); position.setTime(dateBuilder.getDate()); position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte() * 2)); position.setCourse(buf.readUnsignedByte() * 2); int reason = buf.readUnsignedMedium(); position.set(Position.KEY_EVENT, reason); position.set(Position.KEY_STATUS, buf.readUnsignedShort()); position.set(Position.PREFIX_IO + 1, buf.readUnsignedByte()); position.set(Position.PREFIX_ADC + 1, buf.readUnsignedByte()); position.set(Position.KEY_BATTERY, buf.readUnsignedByte()); position.set(Position.KEY_POWER, buf.readUnsignedByte()); buf.readUnsignedByte(); // max journey speed buf.skipBytes(6); // accelerometer buf.readUnsignedShort(); // journey distance buf.readUnsignedShort(); // journey idle time position.setAltitude(buf.readUnsignedByte() * 20); int quality = buf.readUnsignedByte(); position.set(Position.KEY_SATELLITES, quality & 0xf); position.set(Position.KEY_GSM, quality >> 4); buf.readUnsignedByte(); // geofence events if (BitUtil.check(reason, 6) || BitUtil.check(reason, 7)) { position.set(Position.KEY_RFID, buf.readBytes(7).toString(StandardCharsets.US_ASCII)); position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium()); buf.readUnsignedShort(); // engine time } // extra data positions.add(position); } return positions; } }