File content as of revision 1:ba68cceb2917:

/*
Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
 
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 LWIPNETDNSREQUEST_H
#define LWIPNETDNSREQUEST_H

#define NET_LWIP_STACK 1
#include "if/net/netdnsrequest.h"

//struct ip_addr_t;
#include "lwip/ip_addr.h"

class LwipNetDnsRequest : public NetDnsRequest
{
public:
  LwipNetDnsRequest(const char* hostname);
  LwipNetDnsRequest(Host* pHost);
  virtual ~LwipNetDnsRequest();

  //Execute request & return OK if found, NOTFOUND or ERROR on error, or PROCESSING if the request has not completed yet
  virtual void poll();
  
  virtual void close();

protected:
  void foundCb(const char *name, ip_addr_t *ipaddr);
  
private:
  enum LwipNetDnsState
  {
    LWIPNETDNS_START,
    LWIPNETDNS_PROCESSING, //Req has not completed
    LWIPNETDNS_NOTFOUND,
    LWIPNETDNS_ERROR,
    LWIPNETDNS_OK
  };

  LwipNetDnsState m_state;
  bool m_cbFired;
  
  //Static callbacks : Transforms into a C++ callback
  static void sFoundCb(const char *name, ip_addr_t *ipaddr, void *arg);
  
  static void dnsTick();
  
  bool m_closing;
};

#endif