From aa726ddd6617b0f72763d69c1968466b090b3023 Mon Sep 17 00:00:00 2001
From: Daijiro Wachi <daijiro.wachi@gmail.com>
Date: Thu, 7 Oct 2021 15:29:40 +0900
Subject: [PATCH] net: throw error to object mode in Socket

Fixes: https://github.com/nodejs/node/issues/40336
---
 lib/net.js                                    | 15 +++++++++++
 .../test-net-connect-options-invalid.js       | 27 +++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 test/parallel/test-net-connect-options-invalid.js

diff --git a/lib/net.js b/lib/net.js
index ded48732c2e11e..666854a3ccff60 100644
--- a/lib/net.js
+++ b/lib/net.js
@@ -30,6 +30,7 @@ const {
   NumberIsNaN,
   NumberParseInt,
   ObjectDefineProperty,
+  ObjectKeys,
   ObjectSetPrototypeOf,
   Symbol,
 } = primordials;
@@ -282,6 +283,20 @@ const kSetNoDelay = Symbol('kSetNoDelay');
 
 function Socket(options) {
   if (!(this instanceof Socket)) return new Socket(options);
+  const invalidKeys = [
+    'objectMode',
+    'readableObjectMode',
+    'writableObjectMode',
+  ];
+  invalidKeys.forEach((invalidKey) => {
+    if (ObjectKeys(options).includes(invalidKey)) {
+      throw new ERR_INVALID_ARG_VALUE(
+        `options.${invalidKey}`,
+        options[invalidKey],
+        'is not supported'
+      );
+    }
+  });
 
   this.connecting = false;
   // Problem with this is that users can supply their own handle, that may not
diff --git a/test/parallel/test-net-connect-options-invalid.js b/test/parallel/test-net-connect-options-invalid.js
new file mode 100644
index 00000000000000..441e2583f3ee99
--- /dev/null
+++ b/test/parallel/test-net-connect-options-invalid.js
@@ -0,0 +1,27 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const net = require('net');
+
+{
+  const invalidKeys = [
+    'objectMode',
+    'readableObjectMode',
+    'writableObjectMode',
+  ];
+  invalidKeys.forEach((invalidKey) => {
+    const option = {
+      ...common.localhostIPv4,
+      [invalidKey]: true
+    };
+    const message = `The property 'options.${invalidKey}' is not supported. Received true`;
+
+    assert.throws(() => {
+      net.createConnection(option);
+    }, {
+      code: 'ERR_INVALID_ARG_VALUE',
+      name: 'TypeError',
+      message: new RegExp(message)
+    });
+  });
+}