From fb1ef3544529de3aad4116492499b527efc0956f Mon Sep 17 00:00:00 2001
From: Joern Weissenborn <joern.weissenborn@gmail.com>
Date: Fri, 24 Nov 2017 19:37:41 +0100
Subject: [PATCH 1/2] ESP8266mDNS: Fix flushing answers when there is no query
 resopense.

* moved cleanup of answerse from `parsedPackage` to `queryService`
* removed `_newQuery`
---
 libraries/ESP8266mDNS/ESP8266mDNS.cpp | 26 +++++++++++---------------
 1 file changed, 11 insertions(+), 15 deletions(-)

diff --git a/libraries/ESP8266mDNS/ESP8266mDNS.cpp b/libraries/ESP8266mDNS/ESP8266mDNS.cpp
index 66baf12aff..400a09e1db 100644
--- a/libraries/ESP8266mDNS/ESP8266mDNS.cpp
+++ b/libraries/ESP8266mDNS/ESP8266mDNS.cpp
@@ -123,7 +123,6 @@ MDNSResponder::MDNSResponder() : _conn(0) {
   _instanceName = ""; 
   _answers = 0;
   _query = 0;
-  _newQuery = false;
   _waitingForAnswers = false;
 }
 MDNSResponder::~MDNSResponder() {
@@ -285,6 +284,17 @@ int MDNSResponder::queryService(char *service, char *proto) {
 #ifdef DEBUG_ESP_MDNS_TX
   DEBUG_ESP_PORT.printf("queryService %s %s\n", service, proto);
 #endif  
+
+  // Clear answer list
+  MDNSAnswer *answer;
+  int numAnswers = _getNumAnswers();
+  for (int n = numAnswers - 1; n >= 0; n--) {
+    answer = _getAnswerFromIdx(n);
+    os_free(answer->hostname);
+    os_free(answer);
+    answer = 0;
+  }
+  _answers = 0;
   
   if (_query != 0) {
     os_free(_query);
@@ -293,7 +303,6 @@ int MDNSResponder::queryService(char *service, char *proto) {
   _query = (struct MDNSQuery*)(os_malloc(sizeof(struct MDNSQuery)));
   os_strcpy(_query->_service, service);
   os_strcpy(_query->_proto, proto);
-  _newQuery = true;
   
   char underscore[] = "_";
 
@@ -523,19 +532,6 @@ void MDNSResponder::_parsePacket(){
 
     answerHostName[0] = '\0';
 
-    // Clear answer list
-    if (_newQuery) {
-      int oldAnswers = _getNumAnswers();
-      for (int n = oldAnswers - 1; n >= 0; n--) {
-        answer = _getAnswerFromIdx(n);
-        os_free(answer->hostname);
-        os_free(answer);
-        answer = 0;
-      }
-      _answers = 0;
-      _newQuery = false;
-    }
-
     while (numAnswers--) {
       // Read name
       stringsRead = 0;

From 775022c72a596e62ebe6ccc805e49350452de62a Mon Sep 17 00:00:00 2001
From: Joern Weissenborn <joern.weissenborn@gmail.com>
Date: Fri, 24 Nov 2017 19:55:13 +0100
Subject: [PATCH 2/2] ESP8266MDNS: Removed `_newQuery` from header

---
 libraries/ESP8266mDNS/ESP8266mDNS.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/libraries/ESP8266mDNS/ESP8266mDNS.h b/libraries/ESP8266mDNS/ESP8266mDNS.h
index 37874194ec..756f71ac00 100644
--- a/libraries/ESP8266mDNS/ESP8266mDNS.h
+++ b/libraries/ESP8266mDNS/ESP8266mDNS.h
@@ -116,7 +116,6 @@ class MDNSResponder {
   String _instanceName;
   struct MDNSAnswer * _answers;
   struct MDNSQuery * _query;
-  bool _newQuery;
   bool _waitingForAnswers;
   WiFiEventHandler _disconnectedHandler;
   WiFiEventHandler _gotIPHandler;