From 1c46c37b9a2ebe856b1d4b7e2ddf3cf24526dfb6 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sun, 3 Feb 2013 16:03:07 +1300
Subject: Added Teltonika protocol (fix #14)

---
 .../traccar/protocol/TeltonikaProtocolDecoder.java | 129 +++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 src/org/traccar/protocol/TeltonikaProtocolDecoder.java

(limited to 'src/org/traccar/protocol/TeltonikaProtocolDecoder.java')

diff --git a/src/org/traccar/protocol/TeltonikaProtocolDecoder.java b/src/org/traccar/protocol/TeltonikaProtocolDecoder.java
new file mode 100644
index 000000000..2c1028881
--- /dev/null
+++ b/src/org/traccar/protocol/TeltonikaProtocolDecoder.java
@@ -0,0 +1,129 @@
+/*
+ * 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.charset.Charset;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+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.ServerManager;
+import org.traccar.helper.Log;
+import org.traccar.model.Position;
+
+public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
+    
+    private long deviceId;
+
+    public TeltonikaProtocolDecoder(ServerManager serverManager) {
+        super(serverManager);
+    }
+
+    private void parseIdentification(Channel channel, ChannelBuffer buf) {
+        boolean result = false;
+
+        int length = buf.readUnsignedShort();
+        String imei = buf.toString(buf.readerIndex(), length, Charset.defaultCharset());
+        try {
+            deviceId = getDataManager().getDeviceByImei(imei).getId();
+            result = true;
+        } catch(Exception error) {
+            Log.warning("Unknown device - " + imei);
+        }
+        
+        if (channel != null) {
+            ChannelBuffer response = ChannelBuffers.directBuffer(1);
+            response.writeByte(result ? 1 : 0);
+            channel.write(response);
+        }
+    }
+    
+    private List<Position> parseLocation(Channel channel, ChannelBuffer buf) {
+        List<Position> positions = new LinkedList<Position>();
+        
+        buf.skipBytes(4); // marker
+        buf.readUnsignedInt(); // data length
+        buf.readUnsignedByte(); // codec
+        int count = buf.readUnsignedByte();
+        
+        for (int i = 0; i < count; i++) {
+            Position position = new Position();
+            StringBuilder extendedInfo = new StringBuilder("<protocol>teltonika</protocol>");
+            
+            position.setTime(new Date(buf.readLong()));
+            
+            extendedInfo.append("<priority>");
+            extendedInfo.append(buf.readUnsignedByte());
+            extendedInfo.append("</priority>");
+
+            position.setLongitude(buf.readUnsignedInt() / 10000000.0);
+            position.setLatitude(buf.readUnsignedInt() / 10000000.0);
+            position.setAltitude((double) buf.readUnsignedShort());
+            position.setCourse((double) buf.readUnsignedShort());
+            
+            extendedInfo.append("<satellites>");
+            int satellites = buf.readUnsignedByte();
+            extendedInfo.append(satellites);
+            extendedInfo.append("</satellites>");
+
+            position.setValid(satellites != 0);
+            
+            position.setSpeed((double) buf.readUnsignedShort());
+            
+            extendedInfo.append("<event>");
+            extendedInfo.append(buf.readUnsignedByte());
+            extendedInfo.append("</event>");
+            
+            // Skip IO data
+            buf.readUnsignedByte(); // total IO data records
+            buf.skipBytes(buf.readUnsignedByte() * (1 + 1));
+            buf.skipBytes(buf.readUnsignedByte() * (1 + 2));
+            buf.skipBytes(buf.readUnsignedByte() * (1 + 4));
+            buf.skipBytes(buf.readUnsignedByte() * (1 + 8));
+        
+            position.setExtendedInfo(extendedInfo.toString());
+            positions.add(position);
+        }
+        
+        if (channel != null) {
+            ChannelBuffer response = ChannelBuffers.directBuffer(4);
+            response.writeInt(count);
+            channel.write(response);
+        }
+        
+        return positions;
+    }
+    
+    @Override
+    protected Object decode(ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+        
+        ChannelBuffer buf = (ChannelBuffer) msg;
+        
+        if (buf.getUnsignedShort(0) > 0) {
+            parseIdentification(channel, buf);
+        } else {
+            return parseLocation(channel, buf);
+        }
+        
+        return null;
+    }
+
+}
-- 
cgit v1.2.3