Added meiligao protocol (fix #4)

3 files changed, 270 insertions, 0 deletions

diff --git a/src/org/traccar/Server.java b/src/org/traccar/Server.java
index a6b0a67da..81a1988d1 100644
--- a/src/org/traccar/Server.java
+++ b/src/org/traccar/Server.java
@@ -90,6 +90,7 @@ public class Server {
         initXexun2Server(properties);
         initAvl08Server(properties);
         initEnforaServer(properties);
+        initMeiligaoServer(properties);
 
         // Initialize web server
         if (Boolean.valueOf(properties.getProperty("http.enable"))) {
@@ -416,4 +417,26 @@ public class Server {
         }
     }
 
+    /**
+     * Init Meiligao server
+     */
+    public void initMeiligaoServer(Properties properties) throws SQLException {
+
+        String protocol = "meiligao";
+        if (isProtocolEnabled(properties, protocol)) {
+
+            TrackerServer server = new TrackerServer(getProtocolPort(properties, protocol));
+            final Integer resetDelay = getProtocolResetDelay(properties, protocol);
+
+            server.setPipelineFactory(new GenericPipelineFactory(server, dataManager, isLoggerEnabled()) {
+                protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                    pipeline.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(1024, 2, 2, -4, 4));
+                    pipeline.addLast("objectDecoder", new MeiligaoProtocolDecoder(getDataManager(), resetDelay));
+                }
+            });
+
+            serverList.add(server);
+        }
+    }
+
 }
diff --git a/src/org/traccar/helper/Crc.java b/src/org/traccar/helper/Crc.java
new file mode 100644
index 000000000..a0ad83e72
--- /dev/null
+++ b/src/org/traccar/helper/Crc.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2012 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.helper;
+
+/**
+ * CRC functions
+ */
+public class Crc {
+
+    public static int crc16Ccitt(byte[] bytes) {
+        int crc = 0xFFFF;          // initial value
+        int polynomial = 0x1021;   // 0001 0000 0010 0001 (0, 5, 12)
+
+        for (byte b : bytes) {
+            for (int i = 0; i < 8; i++) {
+                boolean bit = ((b   >> (7-i) & 1) == 1);
+                boolean c15 = ((crc >> 15    & 1) == 1);
+                crc <<= 1;
+                if (c15 ^ bit) crc ^= polynomial;
+             }
+        }
+
+        crc &= 0xffff;
+        return crc;
+    }
+
+}
diff --git a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
new file mode 100644
index 000000000..e836289e4
--- /dev/null
+++ b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
@@ -0,0 +1,207 @@
+/*
+ * Copyright 2012 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.charset.Charset;
+import java.text.ParseException;
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+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.HeapChannelBufferFactory;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.traccar.GenericProtocolDecoder;
+import org.traccar.helper.Crc;
+import org.traccar.model.DataManager;
+import org.traccar.model.Position;
+
+/**
+ * Meiligao protocol decoder
+ */
+public class MeiligaoProtocolDecoder extends GenericProtocolDecoder {
+
+    /**
+     * Initialize
+     */
+    public MeiligaoProtocolDecoder(DataManager dataManager, Integer resetDelay) {
+        super(dataManager, resetDelay);
+    }
+
+    /**
+     * Regular expressions pattern
+     */
+    static private Pattern pattern = Pattern.compile(
+            "([\\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)
+            "[^\\|]+\\|(\\d+.\\d)\\|" +         // Dilution of precision
+            "(\\d+)\\|" +                       // Altitude
+            "([0-9a-fA-F]+)\\|" +               // State
+            ".*"); // TODO: parse ADC
+
+    /**
+     * Parse device id
+     */
+    private String getId(ChannelBuffer buf) {
+        String id = "";
+
+        for (int i = 0; i < 7; i++) {
+            int b = buf.getUnsignedByte(i);
+
+            // First digit
+            int d1 = (b & 0xf0) >> 4;
+            if (d1 == 0xf) break;
+            id += d1;
+
+            // Second digit
+            int d2 = (b & 0x0f);
+            if (d2 == 0xf) break;
+            id += d2;
+        }
+
+        return id;
+    }
+
+    /**
+     * Decode message
+     */
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+        int command = buf.getUnsignedShort(7);
+
+        // Login confirmation
+        if (command == 0x5000) {
+            ChannelBuffer sendBuf = HeapChannelBufferFactory.getInstance().getBuffer(18);
+            sendBuf.writeByte('@');
+            sendBuf.writeByte('@');
+            sendBuf.writeShort(sendBuf.capacity());
+            byte[] array = new byte[7];
+            buf.getBytes(0, array);
+            sendBuf.writeBytes(array);
+            sendBuf.writeShort(0x4000);
+            sendBuf.writeByte(0x01);
+            array = new byte[sendBuf.readableBytes()];
+            sendBuf.getBytes(0, array);
+            sendBuf.writeShort(Crc.crc16Ccitt(array));
+            sendBuf.writeByte('\r');
+            sendBuf.writeByte('\n');
+            if (channel != null) {
+                channel.write(sendBuf);
+            }
+        }
+
+        // Data offset
+        int offset = 7 + 2;
+        if (command == 0x9955) {
+            offset += 0;
+        } else if (command == 0x9016) {
+            offset += 6;
+        } else if (command == 0x9999) {
+            offset += 1;
+        } else {
+            return null;
+        }
+
+        // Create new position
+        Position position = new Position();
+        String extendedInfo = "<protocol>meiligao</protocol>";
+
+        // Get device by id
+        // TODO: change imei to unique id
+        position.setDeviceId(getDataManager().getDeviceByImei(getId(buf)).getId());
+
+        // Parse message
+        String sentence = buf.toString(offset, buf.readableBytes() - offset - 4, Charset.defaultCharset());
+        Matcher parser = pattern.matcher(sentence);
+        if (!parser.matches()) {
+            throw new ParseException(null, 0);
+        }
+
+        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);
+
+        // 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());
+
+        // Dilution of precision
+        extendedInfo += "<hdop>" + parser.group(index++) + "</hdop>";
+
+        // Altitude
+        String altitude = parser.group(index++);
+        if (altitude != null) {
+            position.setAltitude(Double.valueOf(altitude));
+        } else {
+            position.setAltitude(0.0);
+        }
+
+        // State
+        extendedInfo += "<state>" + parser.group(index++) + "</state>";
+
+        // Extended info
+        position.setExtendedInfo(extendedInfo);
+
+        return position;
+    }
+
+}