1 files changed, 114 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/ContinentalProtocolDecoder.java b/src/main/java/org/traccar/protocol/ContinentalProtocolDecoder.java
new file mode 100644
index 000000000..471afa0d6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ContinentalProtocolDecoder.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2018 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 io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+
+public class ContinentalProtocolDecoder extends BaseProtocolDecoder {
+
+    public ContinentalProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_KEEPALIVE = 0x00;
+    public static final int MSG_STATUS = 0x02;
+    public static final int MSG_ACK = 0x06;
+    public static final int MSG_NACK = 0x15;
+
+    private double readCoordinate(ByteBuf buf, boolean extended) {
+        long value = buf.readUnsignedInt();
+        if (extended ? (value & 0x08000000) != 0 : (value & 0x00800000) != 0) {
+            value |= extended ? 0xF0000000 : 0xFF000000;
+        }
+        return (int) value / (extended ? 360000.0 : 3600.0);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        buf.readUnsignedShort(); // length
+        buf.readUnsignedByte(); // software version
+
+        long serialNumber = buf.readUnsignedInt();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(serialNumber));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        buf.readUnsignedByte(); // product
+
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_STATUS) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setFixTime(new Date(buf.readUnsignedInt() * 1000L));
+
+            boolean extended = buf.getUnsignedByte(buf.readerIndex()) != 0;
+            position.setLatitude(readCoordinate(buf, extended));
+            position.setLongitude(readCoordinate(buf, extended));
+
+            position.setCourse(buf.readUnsignedShort());
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+
+            position.setValid(buf.readUnsignedByte() > 0);
+
+            position.setDeviceTime(new Date(buf.readUnsignedInt() * 1000L));
+
+            position.set(Position.KEY_EVENT, buf.readUnsignedShort());
+
+            int input = buf.readUnsignedShort();
+            position.set(Position.KEY_IGNITION, BitUtil.check(input, 0));
+            position.set(Position.KEY_INPUT, input);
+
+            position.set(Position.KEY_OUTPUT, buf.readUnsignedShort());
+            position.set(Position.KEY_BATTERY, buf.readUnsignedByte());
+            position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
+
+            buf.readUnsignedShort(); // reserved
+
+            if (buf.readableBytes() > 4) {
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+            }
+
+            if (buf.readableBytes() > 4) {
+                position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(buf.readUnsignedInt()));
+            }
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}