From ea4720b03e788403a83ecf53d4265f93ceed017a Mon Sep 17 00:00:00 2001
From: Mike Morrison <bikemike@users.noreply.github.com>
Date: Thu, 7 Jun 2018 09:31:49 -0700
Subject: [PATCH] fix issue with compressed pointer (issue 4648) (#4752)

---
 libraries/ESP8266mDNS/ESP8266mDNS.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libraries/ESP8266mDNS/ESP8266mDNS.cpp b/libraries/ESP8266mDNS/ESP8266mDNS.cpp
index e155c9387..2344b0833 100644
--- a/libraries/ESP8266mDNS/ESP8266mDNS.cpp
+++ b/libraries/ESP8266mDNS/ESP8266mDNS.cpp
@@ -551,7 +551,8 @@ void MDNSResponder::_parsePacket(){
         if (tmp8 & 0xC0) { // Compressed pointer
           uint16_t offset = ((((uint16_t)tmp8) & ~0xC0) << 8) | _conn_read8();
           if (_conn->isValidOffset(offset)) {
-              last_bufferpos  = _conn->tell();
+              if (0 == last_bufferpos)
+                last_bufferpos  = _conn->tell();
 #ifdef DEBUG_ESP_MDNS_RX
               DEBUG_ESP_PORT.print("Compressed pointer, jumping from ");
               DEBUG_ESP_PORT.print(last_bufferpos);