From dd8c46eec3282e344eeea5e27d084448c85e1518 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton@traccar.org>
Date: Mon, 10 Apr 2023 19:40:22 -0700
Subject: Add raw data forwarding

---
 .../java/org/traccar/forward/NetworkForwarder.java | 66 ++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 src/main/java/org/traccar/forward/NetworkForwarder.java

(limited to 'src/main/java/org/traccar/forward/NetworkForwarder.java')

diff --git a/src/main/java/org/traccar/forward/NetworkForwarder.java b/src/main/java/org/traccar/forward/NetworkForwarder.java
new file mode 100644
index 000000000..6abf2b7ba
--- /dev/null
+++ b/src/main/java/org/traccar/forward/NetworkForwarder.java
@@ -0,0 +1,66 @@
+/*
+ * 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.forward;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+
+import javax.inject.Inject;
+import javax.inject.Singleton;
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+import java.util.HashMap;
+import java.util.Map;
+
+@Singleton
+public class NetworkForwarder {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(NetworkForwarder.class);
+
+    private final InetAddress destination;
+    private final DatagramSocket connectionUdp;
+    private final Map<InetSocketAddress, Socket> connectionsTcp = new HashMap<>();
+
+    @Inject
+    public NetworkForwarder(Config config) throws IOException {
+        destination = InetAddress.getByName(config.getString(Keys.SERVER_FORWARD));
+        connectionUdp = new DatagramSocket();
+    }
+
+    public void forward(InetSocketAddress source, int port, boolean datagram, byte[] data) {
+        try {
+            if (datagram) {
+                connectionUdp.send(new DatagramPacket(data, data.length, destination, port));
+            } else {
+                Socket connectionTcp = connectionsTcp.get(source);
+                if (connectionTcp == null || connectionTcp.isClosed()) {
+                    connectionTcp = new Socket(destination, port);
+                    connectionsTcp.put(source, connectionTcp);
+                }
+                connectionTcp.getOutputStream().write(data);
+            }
+        } catch (IOException e) {
+            LOGGER.warn("Network forwarding error", e);
+        }
+    }
+
+}
-- 
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