/* * Copyright 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 java.net.SocketAddress; import java.util.Calendar; import java.util.LinkedList; import java.util.List; import java.util.TimeZone; import org.jboss.netty.buffer.ChannelBuffer; import org.jboss.netty.buffer.ChannelBuffers; import org.jboss.netty.channel.Channel; import org.jboss.netty.channel.ChannelHandlerContext; import org.traccar.BaseProtocolDecoder; import org.traccar.model.Event; import org.traccar.model.Position; public class OrionProtocolDecoder extends BaseProtocolDecoder { public OrionProtocolDecoder(OrionProtocol protocol) { super(protocol); } private static final int TYPE_USERLOG = 0; private static final int TYPE_SYSLOG = 3; private static void sendResponse(Channel channel, ChannelBuffer buf) { if (channel != null) { ChannelBuffer response = ChannelBuffers.directBuffer(4); response.writeByte('*'); response.writeShort(buf.getUnsignedShort(buf.writerIndex() - 2)); response.writeByte(buf.getUnsignedByte(buf.writerIndex() - 3)); channel.write(response); } } private static double convertCoordinate(int value) { double degrees = value / 1000000; double minutes = (value % 1000000) / 10000.0; return degrees + minutes / 60; } @Override protected Object decode( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { ChannelBuffer buf = (ChannelBuffer) msg; buf.skipBytes(2); // header int type = buf.readUnsignedByte() & 0x0f; if (type == TYPE_USERLOG) { int header = buf.readUnsignedByte(); if ((header & 0x40) != 0) { sendResponse(channel, buf); } if (!identify(String.valueOf(buf.readUnsignedInt()), channel)) { return null; } List<Position> positions = new LinkedList<>(); for (int i = 0; i < (header & 0x0f); i++) { // Create new position Position position = new Position(); position.setDeviceId(getDeviceId()); position.setProtocol(getProtocolName()); position.set(Event.KEY_EVENT, buf.readUnsignedByte()); buf.readUnsignedByte(); // length position.set(Event.KEY_FLAGS, buf.readUnsignedShort()); // Location position.setLatitude(convertCoordinate(buf.readInt())); position.setLongitude(convertCoordinate(buf.readInt())); position.setAltitude(buf.readShort()/ 10.0); position.setCourse(buf.readUnsignedShort()); position.setSpeed(buf.readUnsignedShort() * 0.0539957); // Date and time Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC")); time.clear(); time.set(Calendar.YEAR, 2000 + buf.readUnsignedByte()); time.set(Calendar.MONTH, buf.readUnsignedByte() - 1); time.set(Calendar.DAY_OF_MONTH, buf.readUnsignedByte()); time.set(Calendar.HOUR_OF_DAY, buf.readUnsignedByte()); time.set(Calendar.MINUTE, buf.readUnsignedByte()); time.set(Calendar.SECOND, buf.readUnsignedByte()); position.setTime(time.getTime()); // Accuracy int satellites = buf.readUnsignedByte(); position.set(Event.KEY_SATELLITES, satellites); position.setValid(satellites >= 3); positions.add(position); } return positions; } return null; } }