1 files changed, 72 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/handler/network/NetworkForwarderHandler.java b/src/main/java/org/traccar/handler/network/NetworkForwarderHandler.java
new file mode 100644
index 000000000..5f07ce355
--- /dev/null
+++ b/src/main/java/org/traccar/handler/network/NetworkForwarderHandler.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2023 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.handler.network;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.channel.socket.DatagramChannel;
+import io.netty.channel.socket.DatagramPacket;
+import org.traccar.forward.NetworkForwarder;
+
+import jakarta.inject.Inject;
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+
+public class NetworkForwarderHandler extends ChannelInboundHandlerAdapter {
+
+    private final int port;
+
+    private NetworkForwarder networkForwarder;
+
+    public NetworkForwarderHandler(int port) {
+        this.port = port;
+    }
+
+    @Inject
+    public void setNetworkForwarder(NetworkForwarder networkForwarder) {
+        this.networkForwarder = networkForwarder;
+    }
+
+    @Override
+    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+        boolean datagram = ctx.channel() instanceof DatagramChannel;
+        SocketAddress remoteAddress;
+        ByteBuf buffer;
+        if (datagram) {
+            DatagramPacket message = (DatagramPacket) msg;
+            remoteAddress = message.recipient();
+            buffer = message.content();
+        } else {
+            remoteAddress = ctx.channel().remoteAddress();
+            buffer = (ByteBuf) msg;
+        }
+
+        byte[] data = new byte[buffer.readableBytes()];
+        buffer.getBytes(buffer.readerIndex(), data);
+        networkForwarder.forward((InetSocketAddress) remoteAddress, port, datagram, data);
+        super.channelRead(ctx, msg);
+    }
+
+    @Override
+    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
+        if (!(ctx.channel() instanceof DatagramChannel)) {
+            networkForwarder.disconnect((InetSocketAddress) ctx.channel().remoteAddress());
+        }
+        super.channelInactive(ctx);
+    }
+
+}