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/*******************************************************************************
* shroudBNC - an object-oriented framework for IRC *
* Copyright (C) 2005-2014 Gunnar Beutner *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software *
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
*******************************************************************************/
#ifndef DNSEVENTS_H
#define DNSEVENTS_H
#ifndef SWIG
/**
* DnsEventFunction
*
* A function typedef for DNS event callbacks.
*/
typedef void (*DnsEventFunction)(void *Object, hostent *Response);
class CTimer;
class CDnsQuery;
typedef struct {
int RefCount;
CDnsQuery *Query;
} DnsEventCookie;
/**
* CDnsQuery
*
* A class for dns queries.
*/
class SBNCAPI CDnsQuery {
friend void GenericDnsQueryCallback(void *Cookie, int Status, int Timeouts, hostent *HostEntity);
friend bool DestroyDnsChannelTimer(time_t Now, void *Cookie);
friend class CDnsSocket;
DnsEventCookie *m_EventCookie;
void *m_EventObject; /**< the object used for callbacks */
DnsEventFunction m_EventFunction; /**< the function used for callbacks */
int m_Timeout; /**< timeout for the dns query (in seconds) */
unsigned int m_PendingQueries; /**< number of pending queries */
static ares_channel m_DnsChannel; /**< the ares channel object */
void AsyncDnsEvent(int Status, hostent *Response);
static ares_channel GetDnsChannel(void);
public:
CDnsQuery(void *EventInterface, DnsEventFunction EventFunction, int Timeout = 5);
~CDnsQuery(void);
void GetHostByName(const char *Host, int Family = AF_INET);
void GetHostByAddr(sockaddr *Address);
static DnsSocketCookie *RegisterSockets(void);
static void UnregisterSockets(DnsSocketCookie *Cookie);
static void ProcessTimeouts(void);
};
/**
* IMPL_DNSEVENTPROXY
*
* Implements a DNS event proxy.
*
* @param ClassName the name of the class
* @param Function the name of the function in that class
*/
#define IMPL_DNSEVENTPROXY(ClassName, Function) \
void DnsEventProxy##ClassName##Function(void *Object, hostent *Response) { \
((ClassName *)Object)->Function(Response); \
}
/**
* USE_DNSEVENTPROXY
*
* Returns the name of a DNS event proxy function.
*
* @param ClassName the name of the class
* @param Function the name of the function in that class
*/
#define USE_DNSEVENTPROXY(ClassName, Function) DnsEventProxy##ClassName##Function
#else /* SWIG */
class CDnsQuery;
#endif /* SWIG */
#endif /* DNSEVENTS_H */
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