1 files changed, 104 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/SatsolProtocolDecoder.java b/src/main/java/org/traccar/protocol/SatsolProtocolDecoder.java
new file mode 100644
index 000000000..c457d5620
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SatsolProtocolDecoder.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2019 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.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class SatsolProtocolDecoder extends BaseProtocolDecoder {
+
+    public SatsolProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedShortLE(); // checksum
+        buf.readUnsignedShortLE(); // preamble
+        long id = buf.readUnsignedIntLE();
+        buf.readUnsignedShortLE(); // length
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+
+        while (buf.isReadable()) {
+
+            buf.readUnsignedShortLE(); // checksum
+            buf.readUnsignedShortLE(); // checksum
+            buf.readUnsignedShortLE(); // type
+            int length = buf.readUnsignedShortLE();
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
+            position.setLatitude(buf.readUnsignedIntLE() * 0.000001);
+            position.setLongitude(buf.readUnsignedIntLE() * 0.000001);
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE() * 0.01));
+            position.setAltitude(buf.readShortLE());
+            position.setCourse(buf.readUnsignedShortLE());
+            position.setValid(buf.readUnsignedByte() > 0);
+
+            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+            position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+
+            if (BitUtil.check(buf.readUnsignedByte(), 0)) {
+                position.set(Position.KEY_ARCHIVE, true);
+            }
+
+            positions.add(position);
+
+            buf.skipBytes(length);
+
+        }
+
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeShortLE(0);
+            response.writeShortLE(0x4CBF); // preamble
+            response.writeIntLE((int) id);
+            response.writeShortLE(0);
+            response.setShortLE(0, Checksum.crc16(
+                    Checksum.CRC16_CCITT_FALSE, response.nioBuffer(2, response.readableBytes() - 2)));
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+
+        return positions;
+    }
+
+}