1 files changed, 135 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/Gps056ProtocolDecoder.java b/src/org/traccar/protocol/Gps056ProtocolDecoder.java
new file mode 100644
index 000000000..2d4f6479a
--- /dev/null
+++ b/src/org/traccar/protocol/Gps056ProtocolDecoder.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.helper.*;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class Gps056ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Gps056ProtocolDecoder(Gps056Protocol protocol) {
+        super(protocol);
+    }
+
+    private static void sendResponse(Channel channel, String type, String imei, ChannelBuffer content) {
+        if (channel != null) {
+            ChannelBuffer response = ChannelBuffers.dynamicBuffer();
+            String header = "*" + type + imei;
+            response.writeBytes(header.getBytes(StandardCharsets.US_ASCII));
+            if (content != null) {
+                response.writeBytes(content);
+            }
+            response.writeByte('#');
+            channel.write(response);
+        }
+    }
+
+    private static double decodeCoordinate(ChannelBuffer buf) {
+        double degrees = buf.getUnsignedShort(buf.readerIndex()) / 100;
+        double minutes = buf.readUnsignedShort() % 100 + buf.readUnsignedShort() * 0.0001;
+        degrees += minutes / 60;
+        byte hemisphere = buf.readByte();
+        if (hemisphere == 'S' || hemisphere == 'W') {
+            degrees = -degrees;
+        }
+        return degrees;
+    }
+
+    private static void decodeStatus(ChannelBuffer buf, Position position) {
+
+        position.set(Position.KEY_INPUT, buf.readUnsignedByte());
+        position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
+
+        position.set(Position.PREFIX_ADC + 1, ChannelBuffers.swapShort(buf.readShort()) * 5.06); // mV
+
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        buf.skipBytes(2); // header
+        buf.skipBytes(2); // length
+
+        String type = buf.readBytes(7).toString(StandardCharsets.US_ASCII);
+        String imei = buf.readBytes(15).toString(StandardCharsets.US_ASCII);
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (type.startsWith("LOGN")) {
+
+            sendResponse(channel, "LGSA" + type.substring(4), imei,
+                    ChannelBuffers.copiedBuffer("1", StandardCharsets.US_ASCII));
+
+        } else if (type.startsWith("GPSL")) {
+
+            Position position = new Position();
+            position.setProtocol(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDateReverse(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+
+            position.setValid(true);
+            position.setTime(dateBuilder.getDate());
+            position.setLatitude(decodeCoordinate(buf));
+            position.setLongitude(decodeCoordinate(buf));
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+            position.setCourse(buf.readUnsignedShort());
+
+            decodeStatus(buf, position);
+
+            sendResponse(channel, "GPSA" + type.substring(4), imei, buf.readBytes(2));
+
+            return position;
+
+        } else if (type.startsWith("SYNC")) {
+
+            Position position = new Position();
+            position.setProtocol(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            decodeStatus(buf, position);
+
+            sendResponse(channel, "SYSA" + type.substring(4), imei, null);
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}