From 6173dd78097216261277c20ebd92a53c68c47f89 Mon Sep 17 00:00:00 2001
From: zhangwenxu <zhangwenxu@espressif.com>
Date: Thu, 16 Dec 2021 16:52:05 +0800
Subject: [PATCH] mdns: fix mdns server instance mismatch

---
 components/mdns/mdns.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/components/mdns/mdns.c b/components/mdns/mdns.c
index 988a15fc40..bcea611175 100644
--- a/components/mdns/mdns.c
+++ b/components/mdns/mdns.c
@@ -293,8 +293,14 @@ static mdns_srv_item_t *_mdns_get_service_item_instance(const char *instance, co
 {
     mdns_srv_item_t *s = _mdns_server->services;
     while (s) {
-        if (_mdns_service_match_instance(s->service, instance, service, proto, hostname)) {
-            return s;
+        if (instance) {
+            if (_mdns_service_match_instance(s->service, instance, service, proto, hostname)) {
+                return s;
+            }
+        } else {
+            if (_mdns_service_match(s->service, service, proto, hostname)) {
+                return s;
+            }
         }
         s = s->next;
     }