fix issue with compressed pointer (issue 4648) (#4752)

esp8266 · Jun 7, 2018 · ea4720b · ea4720b
1 parent 73d36bb
commit ea4720b
Showing 1 changed file with 2 additions and 1 deletion.
diff --git 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);