6 files changed, 981 insertions, 0 deletions

diff --git a/src/org/traccar/protocol/gl200/Gl200ProtocolDecoder.java b/src/org/traccar/protocol/gl200/Gl200ProtocolDecoder.java
new file mode 100644
index 000000000..6d0e0a8d9
--- /dev/null
+++ b/src/org/traccar/protocol/gl200/Gl200ProtocolDecoder.java
@@ -0,0 +1,159 @@
+/*
+ * Copyright 2010 Anton Tananaev (anton@tananaev.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 net.sourceforge.opentracking.protocol.gl200;
+
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneDecoder;
+import net.sourceforge.opentracking.Position;
+import net.sourceforge.opentracking.DataManager;
+import org.jboss.netty.channel.ChannelEvent;
+import org.jboss.netty.channel.ChannelState;
+import org.jboss.netty.channel.ChannelStateEvent;
+
+/**
+ * GL200 tracker protocol decoder
+ */
+public class Gl200ProtocolDecoder extends OneToOneDecoder {
+
+    /**
+     * Data manager
+     */
+    private DataManager dataManager;
+
+    /**
+     * Reset connection delay
+     */
+    private Integer resetDelay;
+
+    /**
+     * Init device table
+     */
+    public Gl200ProtocolDecoder(DataManager dataManager, Integer resetDelay) {
+        this.dataManager = dataManager;
+        this.resetDelay = resetDelay;
+    }
+
+    /**
+     * Regular expressions pattern
+     */
+    static private Pattern pattern = Pattern.compile(
+            "\\+RESP:GT...," +
+            "\\d{6}," +                         // Protocol version
+            "(\\d{15})," +                      // IMEI
+            "[^,]*," +                          // Device name
+            "\\d," +                            // Report ID
+            "\\d," +                            // Report type
+            "\\d*," +                           // Number
+            "(\\d*)," +                         // GPS accuracy
+            "(\\d+.\\d)," +                     // Speed
+            "(\\d+)," +                         // Course
+            "(-?\\d+.\\d)," +                   // Altitude
+            "(-?\\d+.\\d+)," +                  // Longitude
+            "(-?\\d+.\\d+)," +                  // Latitude
+            "(\\d{4})(\\d{2})(\\d{2})" +        // Date (YYYYMMDD)
+            "(\\d{2})(\\d{2})(\\d{2})," +       // Time (HHMMSS)
+            "[^$]*");
+
+    /**
+     * Decode message
+     */
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+
+        String sentence = (String) msg;
+
+        // Parse message
+        Matcher parser = pattern.matcher(sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        // Create new position
+        Position position = new Position();
+
+        Integer index = 1;
+
+        // Get device by IMEI
+        String imei = parser.group(index++);
+        position.setDeviceId(dataManager.getDeviceByImei(imei).getId());
+        
+        // Validity
+        position.setValid(Integer.valueOf(parser.group(index++)) == 0 ? false : true);
+        
+        // Position info
+        position.setSpeed(Double.valueOf(parser.group(index++)));
+        position.setCourse(Double.valueOf(parser.group(index++)));
+        position.setAltitude(Double.valueOf(parser.group(index++)));
+        position.setLongitude(Double.valueOf(parser.group(index++)));
+        position.setLatitude(Double.valueOf(parser.group(index++)));
+        
+        // Date
+        Calendar time = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
+        time.clear();
+        time.set(Calendar.YEAR, Integer.valueOf(parser.group(index++)));
+        time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
+        time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
+
+        // Time
+        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++)));
+        position.setTime(time.getTime());
+
+        return position;
+    }
+
+    /**
+     * Disconnect channel
+     */
+    class DisconnectTask extends TimerTask {
+        private Channel channel;
+        
+        public DisconnectTask(Channel channel) {
+            this.channel = channel;
+        }
+        
+        public void run() {
+            channel.disconnect();
+        } 
+    }
+
+    /**
+     * Handle connect event
+     */
+    @Override
+    public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent evt) throws Exception {
+        super.handleUpstream(ctx, evt);
+
+        if (evt instanceof ChannelStateEvent) {
+            ChannelStateEvent event = (ChannelStateEvent) evt;
+
+            if (event.getState() == ChannelState.CONNECTED && event.getValue() != null && resetDelay != 0) {
+                new Timer().schedule(new DisconnectTask(evt.getChannel()), resetDelay);
+            }
+        }
+    }
+
+}
diff --git a/src/org/traccar/protocol/gps103/Gps103ProtocolDecoder.java b/src/org/traccar/protocol/gps103/Gps103ProtocolDecoder.java
new file mode 100644
index 000000000..85e29cc0e
--- /dev/null
+++ b/src/org/traccar/protocol/gps103/Gps103ProtocolDecoder.java
@@ -0,0 +1,180 @@
+/*
+ * Copyright 2010 Anton Tananaev (anton@tananaev.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 net.sourceforge.opentracking.protocol.gps103;
+
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneDecoder;
+import net.sourceforge.opentracking.Position;
+import net.sourceforge.opentracking.DataManager;
+import org.jboss.netty.channel.ChannelEvent;
+import org.jboss.netty.channel.ChannelState;
+import org.jboss.netty.channel.ChannelStateEvent;
+
+/**
+ * Gps 103 tracker protocol decoder
+ */
+public class Gps103ProtocolDecoder extends OneToOneDecoder {
+
+    /**
+     * Data manager
+     */
+    private DataManager dataManager;
+
+    /**
+     * Reset connection delay
+     */
+    private Integer resetDelay;
+
+    /**
+     * Init device table
+     */
+    public Gps103ProtocolDecoder(DataManager dataManager, Integer resetDelay) {
+        this.dataManager = dataManager;
+        this.resetDelay = resetDelay;
+    }
+
+    /**
+     * Regular expressions pattern
+     */
+    static private Pattern pattern = Pattern.compile(
+            "imei:" +
+            "([\\d]+)," +                       // IMEI
+            "[^,]+," +
+            "(\\d{2})(\\d{2})(\\d{2})[\\d]+," + // Date
+            "[+]?[\\d]*," +
+            "[FL]," +                           // F - full / L - low
+            "([\\d]{2})([\\d]{2})([\\d]{2}).([\\d]{3})," + // Time (HHMMSS.SSS)
+            "([AV])," +                         // Validity
+            "([\\d]{2})([\\d]{2}.[\\d]{4})," +  // Latitude (DDMM.MMMM)
+            "([NS])," +
+            "([\\d]{3})([\\d]{2}.[\\d]{4})," +  // Longitude (DDDMM.MMMM)
+            "([EW])," +
+            "([\\d]+.[\\d]{2})," +              // Speed
+            ".*");
+
+    /**
+     * Decode message
+     */
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+
+        String sentence = (String) msg;
+
+        // Send response #1
+        if (sentence.contains("##")) {
+            channel.write("LOAD");
+        }
+        
+        // Send response #2
+        if (sentence.length() == 15 && Character.isDigit(sentence.charAt(0))) {
+            channel.write("ON");
+        }
+
+        // Parse message
+        Matcher parser = pattern.matcher(sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        // Create new position
+        Position position = new Position();
+
+        Integer index = 1;
+
+        // Get device by IMEI
+        String imei = parser.group(index++);
+        position.setDeviceId(dataManager.getDeviceByImei(imei).getId());
+        
+        // Date
+        Calendar time = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
+        time.clear();
+        time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
+        time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
+        time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
+
+        // Time
+        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++)));
+        time.set(Calendar.MILLISECOND, Integer.valueOf(parser.group(index++)));
+        position.setTime(time.getTime());
+
+        // 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);
+        
+        // Altitude
+        position.setAltitude(0.0);
+
+        // Speed
+        position.setSpeed(Double.valueOf(parser.group(index++)));
+        position.setCourse(0.0);
+
+        return position;
+    }
+
+    /**
+     * Disconnect channel
+     */
+    class DisconnectTask extends TimerTask {
+        private Channel channel;
+        
+        public DisconnectTask(Channel channel) {
+            this.channel = channel;
+        }
+        
+        public void run() {
+            channel.disconnect();
+        } 
+    }
+
+    /**
+     * Handle connect event
+     */
+    @Override
+    public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent evt) throws Exception {
+        super.handleUpstream(ctx, evt);
+
+        if (evt instanceof ChannelStateEvent) {
+            ChannelStateEvent event = (ChannelStateEvent) evt;
+
+            if (event.getState() == ChannelState.CONNECTED && event.getValue() != null && resetDelay != 0) {
+                new Timer().schedule(new DisconnectTask(evt.getChannel()), resetDelay);
+            }
+        }
+    }
+
+}
diff --git a/src/org/traccar/protocol/t55/T55ProtocolDecoder.java b/src/org/traccar/protocol/t55/T55ProtocolDecoder.java
new file mode 100644
index 000000000..01954b474
--- /dev/null
+++ b/src/org/traccar/protocol/t55/T55ProtocolDecoder.java
@@ -0,0 +1,200 @@
+/*
+ * Copyright 2010 Anton Tananaev (anton@tananaev.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 net.sourceforge.opentracking.protocol.t55;
+
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneDecoder;
+import net.sourceforge.opentracking.Position;
+import net.sourceforge.opentracking.DataManager;
+import org.jboss.netty.channel.ChannelEvent;
+import org.jboss.netty.channel.ChannelState;
+import org.jboss.netty.channel.ChannelStateEvent;
+
+/**
+ * Gps 103 tracker protocol decoder
+ */
+public class T55ProtocolDecoder extends OneToOneDecoder {
+
+    /**
+     * Data manager
+     */
+    private DataManager dataManager;
+
+    /**
+     * Reset connection delay
+     */
+    private Integer resetDelay;
+    
+    /**
+     * Device ID
+     */
+    private Long deviceId;
+
+    /**
+     * Init device table
+     */
+    public T55ProtocolDecoder(DataManager dataManager, Integer resetDelay) {
+        this.dataManager = dataManager;
+        this.resetDelay = resetDelay;
+    }
+
+    /**
+     * Regular expressions pattern
+     */
+    static private Pattern pattern = Pattern.compile(
+            "\\$GPRMC," +
+            "(\\d{2})(\\d{2})(\\d{2}).(\\d{3})," + // Time (HHMMSS.SSS)
+            "([AV])," +                  // Validity
+            "(\\d{2})(\\d{2}.\\d{4})," + // Latitude (DDMM.MMMM)
+            "([NS])," +
+            "(\\d{3})(\\d{2}.\\d{4})," + // Longitude (DDDMM.MMMM)
+            "([EW])," +
+            "(\\d+.\\d{2})?," +           // Speed
+            "(\\d+.\\d{2})?," +           // Course
+            "(\\d{2})(\\d{2})(\\d{2})" + // Date (DDMMYY)
+            ".+");                     // Other (Checksumm)
+
+    /**
+     * Decode message
+     */
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+
+        String sentence = (String) msg;
+        
+        //System.out.println(sentence);
+
+        // Detect device ID
+        if (sentence.contains("$PGID")) {
+            String imei = sentence.substring(6, 6 + 15);
+            deviceId = dataManager.getDeviceByImei(imei).getId();
+        }
+
+        // Parse message
+        else if (sentence.contains("$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 = new GregorianCalendar(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
+            position.setTime(time.getTime());
+        
+            // 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++)));
+            
+            // Altitude
+            position.setAltitude(0.0);
+            
+            return position;
+        }
+
+        return null;
+    }
+
+    /**
+     * Disconnect channel
+     */
+    class DisconnectTask extends TimerTask {
+        private Channel channel;
+
+        public DisconnectTask(Channel channel) {
+            this.channel = channel;
+        }
+
+        public void run() {
+            channel.disconnect();
+        }
+    }
+
+    /**
+     * Handle connect event
+     */
+    @Override
+    public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent evt) throws Exception {
+        super.handleUpstream(ctx, evt);
+
+        if (evt instanceof ChannelStateEvent) {
+            ChannelStateEvent event = (ChannelStateEvent) evt;
+
+            if (event.getState() == ChannelState.CONNECTED && event.getValue() != null && resetDelay != 0) {
+                new Timer().schedule(new DisconnectTask(evt.getChannel()), resetDelay);
+            }
+        }
+    }
+
+}
diff --git a/src/org/traccar/protocol/tk103/Tk103ProtocolDecoder.java b/src/org/traccar/protocol/tk103/Tk103ProtocolDecoder.java
new file mode 100644
index 000000000..12108b121
--- /dev/null
+++ b/src/org/traccar/protocol/tk103/Tk103ProtocolDecoder.java
@@ -0,0 +1,175 @@
+/*
+ * Copyright 2010 Anton Tananaev (anton@tananaev.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 net.sourceforge.opentracking.protocol.tk103;
+
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneDecoder;
+import net.sourceforge.opentracking.Position;
+import net.sourceforge.opentracking.DataManager;
+import org.jboss.netty.channel.ChannelEvent;
+import org.jboss.netty.channel.ChannelState;
+import org.jboss.netty.channel.ChannelStateEvent;
+
+/**
+ * Gps 103 tracker protocol decoder
+ */
+public class Tk103ProtocolDecoder extends OneToOneDecoder {
+
+    /**
+     * Data manager
+     */
+    private DataManager dataManager;
+
+    /**
+     * Reset connection delay
+     */
+    private Integer resetDelay;
+
+    /**
+     * Init device table
+     */
+    public Tk103ProtocolDecoder(DataManager dataManager, Integer resetDelay) {
+        this.dataManager = dataManager;
+        this.resetDelay = resetDelay;
+    }
+
+    /**
+     * Regular expressions pattern
+     */
+    static private Pattern pattern = Pattern.compile(
+            "\\(" +
+            "(\\d+)" +                   // Device ID
+            "(.{4})" +                   // Command
+            "(\\d{15})" +                // IMEI (?)
+            "(\\d{2})(\\d{2})(\\d{2})" + // Date (YYMMDD)
+            "([AV])" +                   // Validity
+            "(\\d{2})(\\d{2}.\\d{4})" +  // Latitude (DDMM.MMMM)
+            "([NS])" +
+            "(\\d{3})(\\d{2}.\\d{4})" +  // Longitude (DDDMM.MMMM)
+            "([EW])" +
+            "(\\d+.\\d)" +               // Speed
+            "(\\d{2})(\\d{2})(\\d{2})" + // Time (HHMMSS)
+            "(\\d+.\\d{2})" +            // Course
+            "(\\d+)" +                   // State
+            ".+");                       // Mileage (?)
+
+    /**
+     * Decode message
+     */
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+
+        String sentence = (String) msg;
+
+        // TODO: Send response (?)
+
+        // Parse message
+        Matcher parser = pattern.matcher(sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        // Create new position
+        Position position = new Position();
+
+        Integer index = 1;
+        index += 2; // Skip Device ID and command
+
+        // Get device by IMEI
+        String imei = parser.group(index++);
+        position.setDeviceId(dataManager.getDeviceByImei(imei).getId());
+
+        // Date
+        Calendar time = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
+        time.clear();
+        time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
+        time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
+        time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
+
+        // 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);
+
+        // Altitude
+        position.setAltitude(0.0);
+
+        // Speed
+        position.setSpeed(Double.valueOf(parser.group(index++)));
+
+        // Time
+        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++)));
+        position.setTime(time.getTime());
+
+        // Course
+        position.setCourse(Double.valueOf(parser.group(index++)));
+
+        return position;
+    }
+
+    /**
+     * Disconnect channel
+     */
+    class DisconnectTask extends TimerTask {
+        private Channel channel;
+
+        public DisconnectTask(Channel channel) {
+            this.channel = channel;
+        }
+
+        public void run() {
+            channel.disconnect();
+        }
+    }
+
+    /**
+     * Handle connect event
+     */
+    @Override
+    public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent evt) throws Exception {
+        super.handleUpstream(ctx, evt);
+
+        if (evt instanceof ChannelStateEvent) {
+            ChannelStateEvent event = (ChannelStateEvent) evt;
+
+            if (event.getState() == ChannelState.CONNECTED && event.getValue() != null && resetDelay != 0) {
+                new Timer().schedule(new DisconnectTask(evt.getChannel()), resetDelay);
+            }
+        }
+    }
+
+}
diff --git a/src/org/traccar/protocol/xexun/XexunFrameDecoder.java b/src/org/traccar/protocol/xexun/XexunFrameDecoder.java
new file mode 100644
index 000000000..839e5b3ec
--- /dev/null
+++ b/src/org/traccar/protocol/xexun/XexunFrameDecoder.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2010 Anton Tananaev (anton@tananaev.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 net.sourceforge.opentracking.protocol.xexun;
+
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.buffer.ChannelBuffer;
+
+public class XexunFrameDecoder extends FrameDecoder {
+
+    /**
+     * Find string in network buffer
+     */
+    private static Integer find(
+            ChannelBuffer buf,
+            Integer start,
+            Integer length,
+            String subString) {
+
+        int index = start;
+        boolean match;
+
+        for (; index < length; index++) {
+            match = true;
+
+            for (int i = 0; i < subString.length(); i++) {
+                char c = (char) buf.getByte(index + i);
+                if (c != subString.charAt(i)) {
+                    match = false;
+                    break;
+                }
+            }
+
+            if (match) {
+                return index;
+            }
+        }
+
+        return null;
+    }
+
+    protected Object decode(
+            ChannelHandlerContext ctx,
+            Channel channel,
+            ChannelBuffer buf) throws Exception {
+
+        // Check minimum length
+        int length = buf.readableBytes();
+        if (length < 100) {
+            return null;
+        }
+
+        // Find start
+        Integer beginIndex = find(buf, 0, length, "GPRMC");
+        if (beginIndex == null) {
+            return null;
+        }
+
+        // Find identifier
+        Integer idIndex = find(buf, beginIndex, length, "imei:");
+        if (idIndex == null) {
+            return null;
+        }
+
+        // Find end
+        Integer endIndex = find(buf, idIndex, length, ",");
+        if (endIndex == null) {
+            return null;
+        }
+
+        // Read buffer
+        buf.skipBytes(beginIndex);
+        ChannelBuffer frame = buf.readBytes(endIndex - beginIndex + 1);
+
+        return frame;
+    }
+
+}
diff --git a/src/org/traccar/protocol/xexun/XexunProtocolDecoder.java b/src/org/traccar/protocol/xexun/XexunProtocolDecoder.java
new file mode 100644
index 000000000..872569e1a
--- /dev/null
+++ b/src/org/traccar/protocol/xexun/XexunProtocolDecoder.java
@@ -0,0 +1,175 @@
+/*
+ * Copyright 2010 Anton Tananaev (anton@tananaev.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 net.sourceforge.opentracking.protocol.xexun;
+
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+import java.text.ParseException;
+import java.util.TimeZone;
+import java.util.Timer;
+import java.util.TimerTask;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneDecoder;
+import net.sourceforge.opentracking.Position;
+import net.sourceforge.opentracking.DataManager;
+import org.jboss.netty.channel.ChannelEvent;
+import org.jboss.netty.channel.ChannelState;
+import org.jboss.netty.channel.ChannelStateEvent;
+
+/**
+ * Xexun tracker protocol decoder
+ */
+public class XexunProtocolDecoder extends OneToOneDecoder {
+
+    /**
+     * Data manager
+     */
+    private DataManager dataManager;
+
+    /**
+     * Reset connection delay
+     */
+    private Integer resetDelay;
+
+    /**
+     * Init device table
+     */
+    public XexunProtocolDecoder(DataManager dataManager, Integer resetDelay) {
+        this.dataManager = dataManager;
+        this.resetDelay = resetDelay;
+    }
+
+    /**
+     * Regular expressions pattern
+     */
+    static private Pattern pattern = Pattern.compile(
+            "GPRMC," +
+            "([\\d]{2})([\\d]{2})([\\d]{2}).([\\d]{3})," + // Time (HHMMSS.SSS)
+            "([AV])," +                         // Validity
+            "([\\d]{2})([\\d]{2}.[\\d]{4})," +  // Latitude (DDMM.MMMM)
+            "([NS])," +
+            "([\\d]{3})([\\d]{2}.[\\d]{4})," +  // Longitude (DDDMM.MMMM)
+            "([EW])," +
+            "([\\d]+.[\\d]+)," +                // Speed
+            "([\\d]+.[\\d]+)?," +               // Course
+            "([\\d]{2})([\\d]{2})([\\d]{2})," + // Date (DDMMYY)
+            ".*imei:" +
+            "([\\d]+),");                       // IMEI
+
+    /**
+     * Decode message
+     */
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+
+        // Parse message
+        String sentence = (String) msg;
+        Matcher parser = pattern.matcher(sentence);
+        if (!parser.matches()) {
+            throw new ParseException(null, 0);
+        }
+
+        // Create new position
+        Position position = new Position();
+
+        Integer index = 1;
+
+        // Time
+        Calendar time = new GregorianCalendar(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++)));
+        time.set(Calendar.MILLISECOND, Integer.valueOf(parser.group(index++)));
+
+        // 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);
+
+        // Altitude
+        position.setAltitude(0.0);
+        
+        // Speed
+        position.setSpeed(Double.valueOf(parser.group(index++)));
+
+        // 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());
+
+        // Get device by IMEI
+        String imei = parser.group(index++);
+        position.setDeviceId(dataManager.getDeviceByImei(imei).getId());
+
+        return position;
+    }
+
+    /**
+     * Disconnect channel
+     */
+    class DisconnectTask extends TimerTask {
+        private Channel channel;
+
+        public DisconnectTask(Channel channel) {
+            this.channel = channel;
+        }
+
+        public void run() {
+            channel.disconnect();
+        }
+    }
+
+    /**
+     * Handle connect event
+     */
+    @Override
+    public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent evt) throws Exception {
+        super.handleUpstream(ctx, evt);
+
+        if (evt instanceof ChannelStateEvent) {
+            ChannelStateEvent event = (ChannelStateEvent) evt;
+
+            if (event.getState() == ChannelState.CONNECTED && event.getValue() != null && resetDelay != 0) {
+                new Timer().schedule(new DisconnectTask(evt.getChannel()), resetDelay);
+            }
+        }
+    }
+
+}