Start MTA6 protocol implementation

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;
+    }
+
+}