lwipNetDnsRequest.h

00001 
00002 /*
00003 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
00004  
00005 Permission is hereby granted, free of charge, to any person obtaining a copy
00006 of this software and associated documentation files (the "Software"), to deal
00007 in the Software without restriction, including without limitation the rights
00008 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00009 copies of the Software, and to permit persons to whom the Software is
00010 furnished to do so, subject to the following conditions:
00011  
00012 The above copyright notice and this permission notice shall be included in
00013 all copies or substantial portions of the Software.
00014  
00015 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00016 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00017 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00018 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00019 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00020 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00021 THE SOFTWARE.
00022 */
00023 
00024 #ifndef LWIPNETDNSREQUEST_H
00025 #define LWIPNETDNSREQUEST_H
00026 
00027 #define NET_LWIP_STACK 1
00028 #include "if/net/netdnsrequest.h"
00029 
00030 //struct ip_addr_t;
00031 #include "lwip/ip_addr.h"
00032 
00033 class LwipNetDnsRequest : public NetDnsRequest
00034 {
00035 public:
00036   LwipNetDnsRequest(const char* hostname);
00037   LwipNetDnsRequest(Host* pHost);
00038   virtual ~LwipNetDnsRequest();
00039 
00040   //Execute request & return OK if found, NOTFOUND or ERROR on error, or PROCESSING if the request has not completed yet
00041   virtual void poll();
00042   
00043   virtual void close();
00044 
00045 protected:
00046   void foundCb(const char *name, ip_addr_t *ipaddr);
00047   
00048 private:
00049   enum LwipNetDnsState
00050   {
00051     LWIPNETDNS_START,
00052     LWIPNETDNS_PROCESSING, //Req has not completed
00053     LWIPNETDNS_NOTFOUND,
00054     LWIPNETDNS_ERROR,
00055     LWIPNETDNS_OK
00056   };
00057 
00058   LwipNetDnsState m_state;
00059   bool m_cbFired;
00060   
00061   //Static callbacks : Transforms into a C++ callback
00062   static void sFoundCb(const char *name, ip_addr_t *ipaddr, void *arg);
00063   
00064   bool m_closing;
00065 };
00066 
00067 #endif