1 files changed, 179 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/ArnaviBinaryProtocolDecoder.java b/src/main/java/org/traccar/protocol/ArnaviBinaryProtocolDecoder.java
new file mode 100644
index 000000000..e957a6911
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ArnaviBinaryProtocolDecoder.java
@@ -0,0 +1,179 @@
+/*
+ * Copyright 2020 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 Ivan Muratov (binakot@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 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.Checksum;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class ArnaviBinaryProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final byte HEADER_START_SIGN = (byte) 0xff;
+    private static final byte HEADER_VERSION_1 = 0x22;
+    private static final byte HEADER_VERSION_2 = 0x23;
+
+    private static final byte RECORD_PING = 0x00;
+    private static final byte RECORD_DATA = 0x01;
+    private static final byte RECORD_TEXT = 0x03;
+    private static final byte RECORD_FILE = 0x04;
+    private static final byte RECORD_BINARY = 0x06;
+
+    private static final byte TAG_LATITUDE = 3;
+    private static final byte TAG_LONGITUDE = 4;
+    private static final byte TAG_COORD_PARAMS = 5;
+
+    public ArnaviBinaryProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private void sendResponse(Channel channel, byte version, int index) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte(0x7b);
+            if (version == HEADER_VERSION_1) {
+                response.writeByte(0x00);
+                response.writeByte((byte) index);
+            } else if (version == HEADER_VERSION_2) {
+                response.writeByte(0x04);
+                response.writeByte(0x00);
+                ByteBuffer time = ByteBuffer.allocate(4).putInt((int) (System.currentTimeMillis() / 1000));
+                ((Buffer) time).position(0);
+                response.writeByte(Checksum.modulo256(time.slice()));
+                response.writeBytes(time);
+            }
+            response.writeByte(0x7d);
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    private Position decodePosition(DeviceSession deviceSession, ByteBuf buf, int length, Date time) {
+
+        final Position position = new Position();
+        position.setProtocol(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(time);
+
+        int readBytes = 0;
+        while (readBytes < length) {
+            short tag = buf.readUnsignedByte();
+            switch (tag) {
+                case TAG_LATITUDE:
+                    position.setLatitude(buf.readFloatLE());
+                    position.setValid(true);
+                    break;
+
+                case TAG_LONGITUDE:
+                    position.setLongitude(buf.readFloatLE());
+                    position.setValid(true);
+                    break;
+
+                case TAG_COORD_PARAMS:
+                    position.setCourse(buf.readUnsignedByte() * 2);
+                    position.setAltitude(buf.readUnsignedByte() * 10);
+                    byte satellites = buf.readByte();
+                    position.set(Position.KEY_SATELLITES, satellites & 0x0F + (satellites >> 4) & 0x0F);
+                    position.setSpeed(buf.readUnsignedByte());
+                    break;
+
+                default:
+                    buf.skipBytes(4);
+                    break;
+            }
+
+            readBytes += 1 + 4;
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        byte startSign = buf.readByte();
+
+        if (startSign == HEADER_START_SIGN) {
+
+            byte version = buf.readByte();
+
+            String imei = String.valueOf(buf.readLongLE());
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+
+            if (deviceSession != null) {
+                sendResponse(channel, version, 0);
+            }
+
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+
+        int index = buf.readUnsignedByte();
+
+        byte recordType = buf.readByte();
+        while (buf.readableBytes() > 0) {
+            switch (recordType) {
+                case RECORD_PING:
+                case RECORD_DATA:
+                case RECORD_TEXT:
+                case RECORD_FILE:
+                case RECORD_BINARY:
+                    int length = buf.readUnsignedShortLE();
+                    Date time = new Date(buf.readUnsignedIntLE() * 1000);
+
+                    if (recordType == RECORD_DATA) {
+                        positions.add(decodePosition(deviceSession, buf, length, time));
+                    } else {
+                        buf.readBytes(length);
+                    }
+
+                    buf.readUnsignedByte(); // checksum
+                    break;
+
+                default:
+                    return null;
+            }
+
+            recordType = buf.readByte();
+        }
+
+        sendResponse(channel, HEADER_VERSION_1, index);
+
+        return positions;
+    }
+
+}