Diff: api/DNSRequest.h

Revision:

0:ac1725ba162c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/api/DNSRequest.h	Tue Nov 09 20:54:15 2010 +0000
@@ -0,0 +1,131 @@
+
+/*
+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.
+*/
+
+/** \file
+DNS Request header file
+*/
+
+#ifndef DNSREQUEST_H
+#define DNSREQUEST_H
+
+#include "core/net.h"
+#include "core/ipaddr.h"
+#include "core/host.h"
+//Essentially it is a safe interface to NetDnsRequest
+
+///DNS Request error codes
+enum DNSRequestErr
+{
+  __DNS_MIN = -0xFFFF,
+  DNS_SETUP, ///<DNSRequest not properly configured
+  DNS_IF, ///<Interface has problems, does not exist or is not initialized
+  DNS_MEM, ///<Not enough mem
+  DNS_INUSE, ///<Interface / Port is in use
+  DNS_PROCESSING, ///<Request has not completed
+//...
+  DNS_OK = 0 ///<Success
+};
+
+///DNS Request Result Events
+enum DNSReply
+{
+  DNS_PRTCL,
+  DNS_NOTFOUND, ///Hostname is unknown
+  DNS_ERROR, ///Problem with DNS Service
+  //...
+  DNS_FOUND,
+};
+
+class NetDnsRequest;
+enum NetDnsReply;
+
+///This is a simple DNS Request class
+/**
+  This class exposes an API to deal with DNS Requests
+*/
+class DNSRequest
+{
+public:
+  ///Creates a new request
+  DNSRequest();
+  
+  ///Terminates and closes request
+  ~DNSRequest();
+  
+  ///Resolves an hostname
+  /**
+  @param hostname : hostname to resolve
+  */
+  DNSRequestErr resolve(const char* hostname);
+  
+  ///Resolves an hostname
+  /**
+  @param host : hostname to resolve, the result will be stored in the IpAddr field of this object
+  */
+  DNSRequestErr resolve(Host* pHost);
+  
+  ///Setups callback
+  /**
+  The callback function will be called on result.
+  @param pMethod : callback function
+  */  
+  void setOnReply( void (*pMethod)(DNSReply) );
+  
+  class CDummy;
+  ///Setups callback
+  /**
+  The callback function will be called on result.
+  @param pItem : instance of class on which to execute the callback method
+  @param pMethod : callback method
+  */
+  template<class T> 
+  void setOnReply( T* pItem, void (T::*pMethod)(DNSReply) )
+  {
+    m_pCbItem = (CDummy*) pItem;
+    m_pCbMeth = (void (CDummy::*)(DNSReply)) pMethod;
+  }
+  
+  ///Gets IP address once it has been resolved
+  /**
+  @param pIp : pointer to an IpAddr instance in which to store the resolved IP address
+  */
+  DNSRequestErr getResult(IpAddr* pIp);
+  
+  ///Closes DNS Request before completion
+  DNSRequestErr close();
+  
+protected:
+  void onNetDnsReply(NetDnsReply r);
+  DNSRequestErr checkInst();
+
+private:
+  NetDnsRequest* m_pNetDnsRequest;
+  
+  CDummy* m_pCbItem;
+  void (CDummy::*m_pCbMeth)(DNSReply);
+  
+  void (*m_pCb)(DNSReply);
+
+};
+
+#endif