Implement Pebbell protocol

1 files changed, 93 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/protocol/PebbellProtocolDecoder.java b/src/main/java/org/traccar/protocol/PebbellProtocolDecoder.java
new file mode 100644
index 000000000..acc4fedad
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/PebbellProtocolDecoder.java
@@ -0,0 +1,93 @@
+/*
+ * 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.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class PebbellProtocolDecoder extends BaseProtocolDecoder {
+
+    public PebbellProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_DATA = 0x01;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // header
+        buf.readUnsignedByte(); // properties
+        buf.readUnsignedShortLE(); // length
+        buf.readUnsignedShortLE(); // checksum
+        buf.readUnsignedShortLE(); // index
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_DATA) {
+
+            Position position = new Position(getProtocolName());
+
+            while (buf.isReadable()) {
+                int endIndex = buf.readUnsignedByte() + buf.readerIndex();
+                int key = buf.readUnsignedByte();
+                switch (key) {
+                    case 0x01:
+                        DeviceSession deviceSession = getDeviceSession(
+                                channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII));
+                        if (deviceSession == null) {
+                            return null;
+                        }
+                        position.setDeviceId(deviceSession.getDeviceId());
+                        break;
+                    case 0x20:
+                        position.setLatitude(buf.readIntLE() * 0.0000001);
+                        position.setLongitude(buf.readIntLE() * 0.0000001);
+                        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
+                        position.setCourse(buf.readUnsignedShortLE());
+                        position.setAltitude(buf.readShortLE());
+                        position.setValid(buf.readUnsignedShortLE() > 0);
+                        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+                        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                        break;
+                    default:
+                        break;
+                }
+                buf.readerIndex(endIndex);
+            }
+
+            if (!position.getAttributes().containsKey(Position.KEY_SATELLITES)) {
+                getLastLocation(position, null);
+            }
+
+            return position.getDeviceId() > 0 ? position : null;
+
+        }
+
+        return null;
+    }
+
+}