1 files changed, 47 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/TaipPrefixEncoder.java b/src/main/java/org/traccar/protocol/TaipPrefixEncoder.java
new file mode 100644
index 000000000..b690c176d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TaipPrefixEncoder.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2021 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.ChannelHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.MessageToMessageEncoder;
+import org.traccar.Context;
+import org.traccar.Protocol;
+import org.traccar.config.Keys;
+
+import java.util.List;
+
+@ChannelHandler.Sharable
+public class TaipPrefixEncoder extends MessageToMessageEncoder<ByteBuf> {
+
+    private final Protocol protocol;
+
+    public TaipPrefixEncoder(Protocol protocol) {
+        this.protocol = protocol;
+    }
+
+    @Override
+    protected void encode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) throws Exception {
+        if (Context.getConfig().getBoolean(Keys.PROTOCOL_PREFIX.withPrefix(protocol.getName()))) {
+            Unpooled.wrappedBuffer(Unpooled.wrappedBuffer(new byte[] {0x20, 0x20, 0x06, 0x00}), msg);
+        } else {
+            out.add(msg);
+        }
+    }
+
+}