From cc0ad534e90cb0d7b8cb315d5f2edb86d90d36c2 Mon Sep 17 00:00:00 2001
From: "suren.gabrielyan" <suren.gabrielyan@espressif.com>
Date: Fri, 4 Dec 2020 18:19:19 +0400
Subject: [PATCH 1/2] mDNS: Fix of collision detection during txt length
 calculation

Closes https://github.com/espressif/esp-idf/issues/6114
---
 components/mdns/mdns.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/mdns/mdns.c b/components/mdns/mdns.c
index 5a62fab9a9..5fa9ed177c 100644
--- a/components/mdns/mdns.c
+++ b/components/mdns/mdns.c
@@ -2158,7 +2158,7 @@ static int _mdns_check_txt_collision(mdns_service_t * service, const uint8_t * d
 
     mdns_txt_linked_item_t * txt = service->txt;
     while (txt) {
-        data_len += 2 + strlen(service->txt->key) + strlen(service->txt->value);
+        data_len += 2 + strlen(txt->key) + strlen(txt->value);
         txt = txt->next;
     }
 

From 500edd412aa25a9a2bedfdd7416f1e4c2486d08f Mon Sep 17 00:00:00 2001
From: "suren.gabrielyan" <suren.gabrielyan@espressif.com>
Date: Thu, 14 Jan 2021 14:32:05 +0400
Subject: [PATCH 2/2] mDNS: Fix of text length calculation when detecting a
 collision

---
 components/mdns/mdns.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/mdns/mdns.c b/components/mdns/mdns.c
index 5fa9ed177c..3d3222f5cc 100644
--- a/components/mdns/mdns.c
+++ b/components/mdns/mdns.c
@@ -2147,7 +2147,7 @@ static int _mdns_check_srv_collision(mdns_service_t * service, uint16_t priority
  */
 static int _mdns_check_txt_collision(mdns_service_t * service, const uint8_t * data, size_t len)
 {
-    size_t data_len = 1;
+    size_t data_len = 0;
     if (len == 1 && service->txt) {
         return -1;//we win
     } else if (len > 1 && !service->txt) {