1 files changed, 68 insertions, 0 deletions
diff --git a/tools/node_tcp_proxy.js b/tools/node_tcp_proxy.js
new file mode 100644
index 000000000..7dc1b2612
--- /dev/null
+++ b/tools/node_tcp_proxy.js
@@ -0,0 +1,68 @@
+const net = require("net");
+
+process.on("uncaughtException", function(error) {
+  console.error(error);
+});
+
+if (process.argv.length != 4) {
+  console.log("usage: %s <localport> <remoteport>", process.argv[1]);
+  process.exit();
+}
+
+const localport = process.argv[2];
+const remoteport = process.argv[3];
+
+const remotehost = "127.0.0.1";
+
+const server = net.createServer(function(localsocket) {
+  const remotesocket = new net.Socket();
+
+  remotesocket.connect(remoteport, remotehost);
+
+  localsocket.on("data", function(data) {
+    const flushed = remotesocket.write(data);
+    if (!flushed) {
+      localsocket.pause();
+    }
+  });
+
+  remotesocket.on("data", function(data) {
+    const flushed = localsocket.write(data);
+    if (!flushed) {
+      remotesocket.pause();
+    }
+  });
+
+  localsocket.on("drain", function() {
+    remotesocket.resume();
+  });
+
+  remotesocket.on("drain", function() {
+    localsocket.resume();
+  });
+
+  localsocket.on("close", function() {
+    remotesocket.end();
+  });
+
+  remotesocket.on("close", function() {
+    localsocket.end();
+  });
+
+  localsocket.on("error", function() {
+    localsocket.end();
+  });
+
+  remotesocket.on("error", function() {
+    remotesocket.end();
+  });
+});
+
+server.listen(localport);
+
+console.log(
+  "redirecting connections from 127.0.0.1:%d to %s:%d",
+  localport,
+  remotehost,
+  remoteport
+);