DNS.h

// $Id: DNS.h 21 2010-09-05 04:18:17Z cschwarz1 $

#ifndef BASE_DNS_H
#define BASE_DNS_H

#ifdef _WIN32
    #define WIN32_LEAN_AND_MEAN
    #include <winsock2.h>
#else
    #if defined(__APPLE__) && defined(__MACH__)
        #define BIND_8_COMPAT
    #endif
    #include <resolv.h>
#endif
#include "IOException.h"

namespace base {

    class PPBASE_EXPORT DNS {
    public:
        DNS();

        ~DNS();


        int errcode() const;


        bool existsARecord(const String &host);


        bool existsDomain(const String &domain);


        bool existsHost(const String &host);


        bool existsMX(const String &host);


        bool existsRecord(const String &domain, int *types, int ntypes);


        bool failed() const;


        String fqdn();


        String hostname();

        bool isValidEmailAddr(const String &email);


        String lookup(const String &ipaddr);


        String resolve(const String &host);

    private:
    #ifdef _WIN32
        int                _err;   
    #else
        struct __res_state _rs;    
    #endif

        DISALLOW_COPY_CONSTRUCTOR_AND_ASSIGNMENT(DNS);
    };
}

#endif