From 0c0754b897f62a68d7da3600f96924fab54e4f8f Mon Sep 17 00:00:00 2001
From: Robert Nagy <ronagy@icloud.com>
Date: Fri, 14 Jan 2022 15:26:07 +0100
Subject: [PATCH] [fix] Use the byte length of the data (#2004)

Ensure that the correct length is used when framing the data.
---
 lib/sender.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/sender.js b/lib/sender.js
index d331f653a..c84885362 100644
--- a/lib/sender.js
+++ b/lib/sender.js
@@ -103,10 +103,10 @@ class Sender {
 
     let payloadLength = dataLength;
 
-    if (data.length >= 65536) {
+    if (dataLength >= 65536) {
       offset += 8;
       payloadLength = 127;
-    } else if (data.length > 125) {
+    } else if (dataLength > 125) {
       offset += 2;
       payloadLength = 126;
     }
@@ -136,11 +136,11 @@ class Sender {
     if (skipMasking) return [target, data];
 
     if (merge) {
-      applyMask(data, mask, target, offset, data.length);
+      applyMask(data, mask, target, offset, dataLength);
       return [target];
     }
 
-    applyMask(data, mask, data, 0, data.length);
+    applyMask(data, mask, data, 0, dataLength);
     return [target, data];
   }