Start MXT protocol implementation

2 files changed, 148 insertions, 0 deletions

diff --git a/src/org/traccar/protocol/MxtFrameDecoder.java b/src/org/traccar/protocol/MxtFrameDecoder.java
new file mode 100644
index 000000000..82aa5c91a
--- /dev/null
+++ b/src/org/traccar/protocol/MxtFrameDecoder.java
@@ -0,0 +1,55 @@
+/*
+ * 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 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.frame.FrameDecoder;
+
+public class MxtFrameDecoder extends FrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx,
+            Channel channel,
+            ChannelBuffer buf) throws Exception {
+        
+        if (buf.readableBytes() < 2) {
+            return null;
+        }
+
+        int index = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 0x04);
+        if (index != -1) {
+            ChannelBuffer result = ChannelBuffers.buffer(index + 1 - buf.readerIndex());
+
+            while (buf.readerIndex() <= index) {
+                int b = buf.readUnsignedByte();
+                if (b == 0x10) {
+                    result.writeByte(buf.readUnsignedByte() - 0x20);
+                } else {
+                    result.writeByte(b);
+                }
+            }
+
+            return result;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/org/traccar/protocol/MxtProtocolDecoder.java b/src/org/traccar/protocol/MxtProtocolDecoder.java
new file mode 100644
index 000000000..014033be4
--- /dev/null
+++ b/src/org/traccar/protocol/MxtProtocolDecoder.java
@@ -0,0 +1,93 @@
+/*
+ * 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 org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.helper.ChannelBufferTools;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+import java.util.Date;
+
+public class MxtProtocolDecoder extends BaseProtocolDecoder {
+
+    public MxtProtocolDecoder(String protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        /*buf.readByte(); // header
+        buf.readUnsignedByte(); // version
+        buf.readUnsignedByte(); // type
+
+        // Create new position
+        Position position = new Position();
+        position.setProtocol(getProtocol());
+
+        // Get device id
+        String imei = ChannelBufferTools.readHexString(buf, 16).substring(1);
+        if (!identify(imei)) {
+            return null;
+        }
+        position.setDeviceId(getDeviceId());
+
+        // Time
+        long seconds = buf.readUnsignedInt() & 0x7fffffffl;
+        seconds += 946684800l; // 2000-01-01 00:00
+        position.setTime(new Date(seconds * 1000));
+        
+        boolean hasLocation = false;
+
+        while (buf.readableBytes() > 3) {
+
+            short type = buf.readUnsignedByte();
+            short length = buf.readUnsignedByte();
+
+            switch (type) {
+
+                case DATA_GPS:
+                    hasLocation = true;
+                    position.setValid(true);
+                    position.setLatitude(buf.readInt() / 1000000.0);
+                    position.setLongitude(buf.readInt() / 1000000.0);
+                    position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+                    position.setCourse(buf.readUnsignedShort());
+                    position.set(Event.KEY_HDOP, buf.readUnsignedShort());
+                    break;
+
+                default:
+                    buf.skipBytes(length);
+                    break;
+            }
+        }
+
+        if (hasLocation) {
+            return position;
+        }*/
+        return null;
+    }
+
+}