From 49a0c703c104deb4a85308b8482a613d32a4a05b Mon Sep 17 00:00:00 2001
From: cyberman54 <cyberman@obh.snafu.de>
Date: Fri, 18 Dec 2020 18:38:44 +0100
Subject: [PATCH] wifiscan.cpp: sanitized mac filter condition

---
 src/wifiscan.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/wifiscan.cpp b/src/wifiscan.cpp
index 9e9c480e..edcafe13 100644
--- a/src/wifiscan.cpp
+++ b/src/wifiscan.cpp
@@ -33,8 +33,9 @@ IRAM_ATTR void wifi_sniffer_packet_handler(void *buff,
 
 // process seen MAC
 #if MACFILTER
-  // we guess it's a smartphone, if randomization bit of MAC is set
-  if (!(hdr->addr2[0] & 0b10))
+  // we guess it's a smartphone, if U/L bit #2 of MAC is set
+  // bit #2 = 1 -> local mac (randomized) / bit #2 = 0 -> universal mac
+  if ((hdr->addr2[0] & 0b10) == 0)
     return;
   else
 #endif