/* * Copyright 2015 Vijay Kumar (vijaykumar@zilogic.com) * Copyright 2013 - 2014 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.Log; import org.traccar.model.Position; import java.net.SocketAddress; import java.nio.ByteOrder; import java.nio.charset.StandardCharsets; import java.util.Date; import java.util.HashSet; import java.util.LinkedList; import java.util.List; import java.util.Set; public class BlackKiteProtocolDecoder extends BaseProtocolDecoder { public BlackKiteProtocolDecoder(BlackKiteProtocol protocol) { super(protocol); } private static final int TAG_IMEI = 0x03; private static final int TAG_DATE = 0x20; private static final int TAG_COORDINATES = 0x30; private static final int TAG_SPEED_COURSE = 0x33; private static final int TAG_ALTITUDE = 0x34; private static final int TAG_STATUS = 0x40; private static final int TAG_DIGITAL_OUTPUTS = 0x45; private static final int TAG_DIGITAL_INPUTS = 0x46; private static final int TAG_INPUT_VOLTAGE1 = 0x50; private static final int TAG_INPUT_VOLTAGE2 = 0x51; private static final int TAG_INPUT_VOLTAGE3 = 0x52; private static final int TAG_INPUT_VOLTAGE4 = 0x53; private static final int TAG_XT1 = 0x60; private static final int TAG_XT2 = 0x61; private static final int TAG_XT3 = 0x62; private void sendReply(Channel channel, int checksum) { ChannelBuffer reply = ChannelBuffers.directBuffer(ByteOrder.LITTLE_ENDIAN, 3); reply.writeByte(0x02); reply.writeShort((short) checksum); if (channel != null) { channel.write(reply); } } @Override protected Object decode( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { ChannelBuffer buf = (ChannelBuffer) msg; buf.readUnsignedByte(); // header int length = (buf.readUnsignedShort() & 0x7fff) + 3; List<Position> positions = new LinkedList<>(); Set<Integer> tags = new HashSet<>(); boolean hasLocation = false; Position position = new Position(); position.setProtocol(getProtocolName()); while (buf.readerIndex() < length) { // Check if new message started int tag = buf.readUnsignedByte(); if (tags.contains(tag)) { if (hasLocation && position.getFixTime() != null) { positions.add(position); } tags.clear(); hasLocation = false; position = new Position(); } tags.add(tag); switch (tag) { case TAG_IMEI: String imei = buf.toString(buf.readerIndex(), 15, StandardCharsets.US_ASCII); buf.skipBytes(imei.length()); identify(imei, channel, remoteAddress); break; case TAG_DATE: position.setTime(new Date(buf.readUnsignedInt() * 1000)); break; case TAG_COORDINATES: hasLocation = true; position.setValid((buf.readUnsignedByte() & 0xf0) == 0x00); position.setLatitude(buf.readInt() / 1000000.0); position.setLongitude(buf.readInt() / 1000000.0); break; case TAG_SPEED_COURSE: position.setSpeed(buf.readUnsignedShort() * 0.0539957); position.setCourse(buf.readUnsignedShort() * 0.1); break; case TAG_ALTITUDE: position.setAltitude(buf.readShort()); break; case TAG_STATUS: int status = buf.readUnsignedShort(); position.set(Position.KEY_IGNITION, BitUtil.check(status, 9)); position.set(Position.KEY_ALARM, BitUtil.check(status, 15)); position.set(Position.KEY_POWER, BitUtil.check(status, 2)); break; case TAG_DIGITAL_INPUTS: int input = buf.readUnsignedShort(); for (int i = 0; i < 16; i++) { position.set(Position.PREFIX_IO + (i + 1), BitUtil.check(input, i)); } break; case TAG_DIGITAL_OUTPUTS: int output = buf.readUnsignedShort(); for (int i = 0; i < 16; i++) { position.set(Position.PREFIX_IO + (i + 17), BitUtil.check(output, i)); } break; case TAG_INPUT_VOLTAGE1: position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort() / 1000.0); break; case TAG_INPUT_VOLTAGE2: position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort() / 1000.0); break; case TAG_INPUT_VOLTAGE3: position.set(Position.PREFIX_ADC + 3, buf.readUnsignedShort() / 1000.0); break; case TAG_INPUT_VOLTAGE4: position.set(Position.PREFIX_ADC + 4, buf.readUnsignedShort() / 1000.0); break; case TAG_XT1: case TAG_XT2: case TAG_XT3: buf.skipBytes(16); break; default: break; } } if (hasLocation && position.getFixTime() != null) { positions.add(position); } if (!hasDeviceId()) { Log.warning("Unknown device"); return null; } sendReply(channel, buf.readUnsignedShort()); for (Position p : positions) { p.setDeviceId(getDeviceId()); } if (positions.isEmpty()) { return null; } return positions; } }