1 files changed, 110 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/RecodaProtocolDecoder.java b/src/main/java/org/traccar/protocol/RecodaProtocolDecoder.java
new file mode 100644
index 000000000..04098225f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RecodaProtocolDecoder.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2017 - 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.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class RecodaProtocolDecoder extends BaseProtocolDecoder {
+
+    public RecodaProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_HEARTBEAT = 0x00001001;
+    public static final int MSG_REQUEST_RESPONSE = 0x20000001;
+    public static final int MSG_SIGNAL_LINK_REGISTRATION = 0x20001001;
+    public static final int MSG_EVENT_NOTICE = 0x20002001;
+    public static final int MSG_GPS_DATA = 0x20001011;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int type = buf.readIntLE();
+        buf.readUnsignedIntLE(); // length
+
+        if (type != MSG_HEARTBEAT) {
+            buf.readUnsignedShortLE(); // version
+            buf.readUnsignedShortLE(); // index
+        }
+
+        if (type == MSG_SIGNAL_LINK_REGISTRATION) {
+
+            getDeviceSession(channel, remoteAddress, buf.readSlice(12).toString(StandardCharsets.US_ASCII));
+
+        } else if (type == MSG_GPS_DATA) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setTime(new Date(buf.readLongLE()));
+
+            int flags = buf.readUnsignedByte();
+
+            if (BitUtil.check(flags, 0)) {
+
+                buf.readUnsignedShortLE(); // declination
+
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
+
+                position.setLongitude(buf.readUnsignedByte() + buf.readUnsignedByte() / 60.0);
+                position.setLatitude(buf.readUnsignedByte() + buf.readUnsignedByte() / 60.0);
+
+                position.setLongitude(position.getLongitude() + buf.readUnsignedIntLE() / 3600.0);
+                position.setLatitude(position.getLatitude() + buf.readUnsignedIntLE() / 3600.0);
+
+                int status = buf.readUnsignedByte();
+
+                position.setValid(BitUtil.check(status, 0));
+                if (BitUtil.check(status, 1)) {
+                    position.setLongitude(-position.getLongitude());
+                }
+                if (!BitUtil.check(status, 2)) {
+                    position.setLatitude(-position.getLatitude());
+                }
+
+            } else {
+
+                getLastLocation(position, position.getDeviceTime());
+
+            }
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}