Add mDNS library for esp8266

libraries/ESP8266mDNS/ESP8266mDNS.h

@@ -0,0 +1,69 @@
+/*
+ESP8266 Multicast DNS (port of CC3000 Multicast DNS library)
+Version 1.1
+Copyright (c) 2013 Tony DiCola (tony@tonydicola.com)
+ESP8266 port (c) 2015 Ivan Grokhotkov (igrokhotkov@gmail.com)
+
+This is a simple implementation of multicast DNS query support for an Arduino
+running on ESP8266 chip. Only support for resolving address queries is currently
+implemented.
+
+Requirements:
+- ESP8266WiFi library
+
+Usage:
+- Include the ESP8266 Multicast DNS library in the sketch.
+- Create an instance of the MDNSResponder class.
+- Call the begin method in the sketch's setup and provide a domain name (without
+  the '.local' suffix, i.e. just provide 'foo' to resolve 'foo.local'), and the 
+  Adafruit CC3000 class instance.  Optionally provide a time to live (in seconds) 
+  for the DNS record--the default is 1 hour.
+- Call the update method in each iteration of the sketch's loop function.
+
+License (MIT license):
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+
+*/
+#ifndef ESP8266MDNS_H
+#define ESP8266MDNS_H
+
+#include "ESP8266WiFi.h"
+#include "WiFiUdp.h"
+
+class MDNSResponder {
+public:
+  MDNSResponder();
+  ~MDNSResponder();
+  bool begin(const char* domain, IPAddress addr, uint32_t ttlSeconds = 3600);
+  void update();
+
+private:
+  // Expected query values
+  uint8_t* _expected;
+  int _expectedLen;
+  // Current parsing state
+  int _index;
+  // Response data
+  uint8_t* _response;
+  int _responseLen;
+  // Socket for MDNS communication
+  WiFiUDP _mdnsConn;
+};
+
+#endif //ESP8266MDNS_H