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Diffstat (limited to 'src/org/traccar/protocol/Mta6ProtocolDecoder.java')
| -rw-r--r-- | src/org/traccar/protocol/Mta6ProtocolDecoder.java | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/Mta6ProtocolDecoder.java b/src/org/traccar/protocol/Mta6ProtocolDecoder.java new file mode 100644 index 000000000..39d8f680b --- /dev/null +++ b/src/org/traccar/protocol/Mta6ProtocolDecoder.java @@ -0,0 +1,248 @@ +/* + * Copyright 2013 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.nio.ByteOrder; +import java.nio.charset.Charset; +import java.util.Calendar; +import java.util.LinkedList; +import java.util.List; +import java.util.TimeZone; +import java.util.regex.Matcher; +import java.util.regex.Pattern; +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.jboss.netty.handler.codec.http.DefaultHttpResponse; +import org.jboss.netty.handler.codec.http.HttpHeaders; +import org.jboss.netty.handler.codec.http.HttpRequest; +import org.jboss.netty.handler.codec.http.HttpResponse; +import org.jboss.netty.handler.codec.http.HttpResponseStatus; +import org.jboss.netty.handler.codec.http.HttpVersion; +import org.traccar.BaseProtocolDecoder; +import org.traccar.ServerManager; +import org.traccar.helper.ChannelBufferTools; +import org.traccar.helper.Log; +import org.traccar.model.Position; + +public class Mta6ProtocolDecoder extends BaseProtocolDecoder { + + public Mta6ProtocolDecoder(ServerManager serverManager) { + super(serverManager); + } + + private void sendContinue(Channel channel) { + HttpResponse response = new DefaultHttpResponse( + HttpVersion.HTTP_1_1, HttpResponseStatus.CONTINUE); + channel.write(response); + } + + private void sendResponse(Channel channel, short packetId, short packetCount) { + HttpResponse response = new DefaultHttpResponse( + HttpVersion.HTTP_1_1, HttpResponseStatus.OK); + + ChannelBuffer begin = ChannelBuffers.copiedBuffer("#ACK#", Charset.defaultCharset()); + ChannelBuffer end = ChannelBuffers.directBuffer(3); + end.writeByte(packetId); + end.writeByte(packetCount); + end.writeByte(0); + + response.setContent(ChannelBuffers.wrappedBuffer(begin, end)); + channel.write(response); + } + + private static boolean checkBit(long mask, int bit) { + long checkMask = 1 << bit; + return (mask & checkMask) == checkMask; + } + + private List<Position> parseFormatA(ChannelBuffer buf, long deviceId) { + List<Position> positions = new LinkedList<Position>(); + + while (buf.readable()) { + Position position = new Position(); + position.setDeviceId(deviceId); + StringBuilder extendedInfo = new StringBuilder("<protocol>mta6</protocol>"); + + short flags = buf.readUnsignedByte(); + + // Skip events + short event = buf.readUnsignedByte(); + if (checkBit(event, 7)) { + if (checkBit(event, 6)) { + buf.skipBytes(8); + } else { + while (checkBit(event, 7)) { + event = buf.readUnsignedByte(); + } + } + } + + position.setLatitude((double) Float.intBitsToFloat(buf.readInt() << 2)); + position.setLongitude((double) Float.intBitsToFloat(buf.readInt() << 2)); + + Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC")); + time.setTimeInMillis((buf.readUnsignedInt() << 2) * 1000); + position.setTime(time.getTime()); + + buf.readUnsignedShort(); // week + + + position.setExtendedInfo(extendedInfo.toString()); + positions.add(position); + } + + return positions; + } + + private List<Position> parseFormatB(ChannelBuffer buf, long deviceId) { + return null; + } + + @Override + protected Object decode( + ChannelHandlerContext ctx, Channel channel, Object msg) + throws Exception { + + HttpRequest request = (HttpRequest) msg; + + ChannelBuffer buf = request.getContent(); + int length = buf.readableBytes(); + + // Read identifier + buf.skipBytes("id=".length()); + int index = ChannelBufferTools.find(buf, buf.readerIndex(), length, "&"); + String uniqueId = buf.toString(buf.readerIndex(), index - buf.readerIndex(), Charset.defaultCharset()); + long deviceId = 0; // FIX FIX FIX + /*try { + deviceId = getDataManager().getDeviceByImei(uniqueId).getId(); + } catch(Exception error) { + Log.warning("Unknown device - " + uniqueId); + return null; + }*/ + buf.skipBytes(uniqueId.length()); + buf.skipBytes("&bin=".length()); + + // Read header + short packetId = buf.readUnsignedByte(); + buf.readUnsignedByte(); // dataOffset + short packetCount = buf.readUnsignedByte(); + buf.readUnsignedByte(); // reserved + short parameters = buf.readUnsignedByte(); // TODO: handle timezone + + // Send response + if (channel != null) { + sendContinue(channel); + sendResponse(channel, packetId, packetCount); + } + + // Parse data + if (packetId == 0x31 || packetId == 0x32 || packetId == 0x36) { + return parseFormatA(buf, deviceId); + } else if (packetId == 0x34) { + return parseFormatB(buf, deviceId); + } //else if (0x38 0x4F 0x59) + + + + /*String sentence = (String) msg; + + // Detect device ID + if (sentence.contains("$PGID")) { + String imei = sentence.substring(6, sentence.length() - 3); + try { + deviceId = getDataManager().getDeviceByImei(imei).getId(); + } catch(Exception error) { + Log.warning("Unknown device - " + imei); + } + } + + // Parse message + else if (sentence.contains("$GPRMC") && deviceId != null) { + + // Send response + if (channel != null) { + channel.write("OK1\r\n"); + } + + // Parse message + Matcher parser = pattern.matcher(sentence); + if (!parser.matches()) { + return null; + } + + // Create new position + Position position = new Position(); + position.setDeviceId(deviceId); + + Integer index = 1; + + // Time + Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC")); + time.clear(); + time.set(Calendar.HOUR, Integer.valueOf(parser.group(index++))); + time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++))); + time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++))); + index += 1; // Skip milliseconds + + // Validity + position.setValid(parser.group(index++).compareTo("A") == 0 ? true : false); + + // Latitude + Double latitude = Double.valueOf(parser.group(index++)); + latitude += Double.valueOf(parser.group(index++)) / 60; + if (parser.group(index++).compareTo("S") == 0) latitude = -latitude; + position.setLatitude(latitude); + + // Longitude + Double lonlitude = Double.valueOf(parser.group(index++)); + lonlitude += Double.valueOf(parser.group(index++)) / 60; + if (parser.group(index++).compareTo("W") == 0) lonlitude = -lonlitude; + position.setLongitude(lonlitude); + + // Speed + String speed = parser.group(index++); + if (speed != null) { + position.setSpeed(Double.valueOf(speed)); + } else { + position.setSpeed(0.0); + } + + // Course + String course = parser.group(index++); + if (course != null) { + position.setCourse(Double.valueOf(course)); + } else { + position.setCourse(0.0); + } + + // Date + time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++))); + time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1); + time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++))); + position.setTime(time.getTime()); + + // Altitude + position.setAltitude(0.0); + + return position; + }*/ + + return null; + } + +} |