Implement Castel protocol

1 files changed, 141 insertions, 0 deletions

diff --git a/src/org/traccar/protocol/CastelProtocolDecoder.java b/src/org/traccar/protocol/CastelProtocolDecoder.java
new file mode 100644
index 000000000..071218bf8
--- /dev/null
+++ b/src/org/traccar/protocol/CastelProtocolDecoder.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2015 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.net.SocketAddress;
+import java.nio.charset.Charset;
+import java.util.Calendar;
+import java.util.TimeZone;
+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.helper.Crc;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+public class CastelProtocolDecoder extends BaseProtocolDecoder {
+
+    public CastelProtocolDecoder(String protocol) {
+        super(protocol);
+    }
+
+    private static final int MSG_LOGIN = 0x0110;
+    private static final int MSG_LOGIN_RESPONSE = 0x0190;
+    private static final int MSG_HEARTBEAT = 0x0301;
+    private static final int MSG_HEARTBEAT_RESPONSE = 0x0390;
+    private static final int MSG_GPS = 0x0140;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, SocketAddress remoteAddress, Object msg)
+            throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        buf.skipBytes(2); // header
+        buf.readUnsignedShort(); // length
+        int version = buf.readUnsignedByte();
+        ChannelBuffer id = buf.readBytes(20);
+        int type = buf.readUnsignedShort();
+        
+        if (type == MSG_HEARTBEAT) {
+            
+            if (channel != null) {
+                ChannelBuffer response = ChannelBuffers.directBuffer(31);
+                response.writeByte(0x40); response.writeByte(0x40); // header
+                response.writeShort(response.capacity()); // size
+                response.writeByte(version);
+                response.writeBytes(id);
+                response.writeShort(MSG_HEARTBEAT_RESPONSE);
+                response.writeShort(Crc.crc16Ccitt(response.toByteBuffer(2, 4))); // TODO
+                response.writeByte(0x0D); response.writeByte(0x0A); // ending
+                channel.write(response, remoteAddress);
+            }
+
+        } else if (type == MSG_LOGIN || type == MSG_GPS) {
+            
+            Position position = new Position();
+            position.setDeviceId(getDeviceId());
+            position.setProtocol(getProtocol());
+            
+            if (!identify(id.toString(Charset.defaultCharset()))) {
+                return null;
+            } else if (type == MSG_LOGIN) {
+
+                if (channel != null) {
+                    ChannelBuffer response = ChannelBuffers.directBuffer(41);
+                    response.writeByte(0x40); response.writeByte(0x40); // header
+                    response.writeShort(response.capacity()); // size
+                    response.writeByte(version);
+                    response.writeBytes(id);
+                    response.writeShort(MSG_LOGIN_RESPONSE);
+                    response.writeInt(0xFFFFFFFF);
+                    response.writeShort(0);
+                    response.writeInt(0); // TODO
+                    response.writeShort(Crc.crc16Ccitt(response.toByteBuffer(2, 4))); // TODO
+                    response.writeByte(0x0D); response.writeByte(0x0A); // ending
+                    channel.write(response, remoteAddress);
+                }
+            
+            }
+            
+            if (type == MSG_GPS) {
+                buf.readUnsignedByte(); // historical
+            }
+            
+            buf.readUnsignedInt(); // ACC ON time
+            buf.readUnsignedInt(); // UTC time
+            position.set(Event.KEY_ODOMETER, buf.readUnsignedInt());
+            buf.readUnsignedInt(); // trip odometer
+            buf.readUnsignedInt(); // total fuel consumption
+            buf.readUnsignedShort(); // current fuel consumption
+            position.set(Event.KEY_STATUS, buf.readUnsignedInt());
+            buf.skipBytes(8);
+            
+            buf.readUnsignedByte(); // count
+            
+            // Date and time
+            Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+            time.clear();
+            time.set(Calendar.DAY_OF_MONTH, buf.readUnsignedByte());
+            time.set(Calendar.MONTH, buf.readUnsignedByte() - 1);
+            time.set(Calendar.YEAR, 2000 + buf.readUnsignedByte());
+            time.set(Calendar.HOUR_OF_DAY, buf.readUnsignedByte());
+            time.set(Calendar.MINUTE, buf.readUnsignedByte());
+            time.set(Calendar.SECOND, buf.readUnsignedByte());
+            position.setTime(time.getTime());
+            
+            double lat = buf.readUnsignedInt() / 3600000.0;
+            double lon = buf.readUnsignedInt() / 3600000.0;
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+            position.setCourse(buf.readUnsignedShort());
+            
+            int flags = buf.readUnsignedByte();
+            position.setLatitude((flags & 0x01) == 0 ? -lat : lat);
+            position.setLongitude((flags & 0x02) == 0 ? -lon : lon);
+            position.setValid((flags & 0x0C) > 0);
+            position.set(Event.KEY_SATELLITES, flags >> 4);
+            
+            return position;
+        }
+        
+        return null;
+    }
+
+}