DnsRequest.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 DNSREQUEST_H
00025 #define DNSREQUEST_H
00026 
00027 #include "if/net/net.h"
00028 //Essentially it is a safe interface to NetDnsRequest
00029 
00030 enum DnsRequestErr
00031 {
00032   __DNS_MIN = -0xFFFF,
00033   DNS_SETUP, //NetDnsRequest not properly configured
00034   DNS_IF, //If has problems, does not exist or is not initialized
00035   DNS_MEM, //Not enough mem
00036   DNS_INUSE, //If/Port is in use
00037   DNS_PROCESSING, //Req has not completed
00038 //...
00039   DNS_OK = 0
00040 };
00041 
00042 enum DnsReply
00043 {
00044   DNS_PRTCL,
00045   DNS_NOTFOUND, //Hostname is unknown
00046   DNS_ERROR, //Problem with DNS Service
00047   //...
00048   DNS_FOUND,
00049 };
00050 
00051 class DnsRequest
00052 {
00053 public:
00054   DnsRequest();
00055   ~DnsRequest();
00056   
00057   DnsRequestErr resolve(const char* hostname);
00058   DnsRequestErr resolve(Host* pHost);
00059   
00060   class CDummy;
00061   void setOnReply( void (*pMethod)(DnsReply) );
00062   template<class T> 
00063   //Linker bug : Must be defined here :(
00064   void setOnReply( T* pItem, void (T::*pMethod)(DnsReply) )
00065   {
00066     m_pCbItem = (CDummy*) pItem;
00067     m_pCbMeth = (void (CDummy::*)(DnsReply)) pMethod;
00068   }
00069   
00070   DnsRequestErr getResult(IpAddr* pIp);
00071   
00072   DnsRequestErr close();
00073   
00074 protected:
00075   void onNetDnsReply(NetDnsReply r);
00076   DnsRequestErr checkInst();
00077 
00078 private:
00079   NetDnsRequest* m_pNetDnsRequest;
00080   
00081   CDummy* m_pCbItem;
00082   void (CDummy::*m_pCbMeth)(DnsReply);
00083   
00084   void (*m_pCb)(DnsReply);
00085 
00086 };
00087 
00088 #endif