From cf0b85c7d92c7382cd87d5abb6b3a1bede70de6f Mon Sep 17 00:00:00 2001
From: ivmarkov <ivan.markov@gmail.com>
Date: Sun, 30 Jul 2023 11:12:18 +0000
Subject: [PATCH] Bugfix: ESP IDF mDNS queries might return NULL query results

---
 src/mdns.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mdns.rs b/src/mdns.rs
index 350c47e5188..ec37b5b038d 100644
--- a/src/mdns.rs
+++ b/src/mdns.rs
@@ -475,8 +475,8 @@ impl Drop for EspMdns {
     }
 }
 
-fn copy_query_results(src: *const mdns_result_t, dst: &mut [QueryResult]) -> usize {
-    if let Some(src) = unsafe { src.as_ref() } {
+fn copy_query_results(src: *mut mdns_result_t, dst: &mut [QueryResult]) -> usize {
+    if !src.is_null() {
         let mut p = src;
         let mut i = 0;
         while !p.is_null() && i < dst.len() {