misc/serverspy/dnshelper.cpp

/***************************************************************************
 *   Copyright (C) 2003 by Torben Nielsen                                  *
 *   torben.nielsen@rocketmail.com                                         *
 *                                                                         *
 *   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.                                   *
 ***************************************************************************/
#include "dnshelper.h"

#include <sys/types.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

using std::string;

std::string DnsHelper::getIp(const std::string& hostname)
{
        if ( hostname == "" )
                return "";
        hostent *hostptr = gethostbyname( hostname.c_str() );

        if (hostptr == 0)
                return ("");

        in_addr *ptr;
        char **listptr = hostptr->h_addr_list;
        ptr = (struct in_addr *) *listptr;

        if (ptr == 0)
                return "not found";
        else
                return inet_ntoa(*ptr);
}

std::string DnsHelper::getHostname(const std::string& ipaddress)
{
        if ( ipaddress == "" )
                return "";

        sockaddr_in sin;

        bzero( (caddr_t *) &sin,sizeof( sin ) ); // clear out the structure
        sin.sin_family = AF_INET;  // set the family (only AF_INET is valid
        sin.sin_addr.s_addr = inet_addr( ipaddress.c_str() ); // convert from dottet decimal to 32 bit long int
        hostent *hostptr = gethostbyaddr( (char *)&(sin.sin_addr), sizeof(sin.sin_addr), (int)sin.sin_family);

        if (hostptr == 0)
                return "not found";
        else
                return hostptr->h_name;
}
1	torben	328	/***************************************************************************
2			* Copyright (C) 2003 by Torben Nielsen *
3			* torben.nielsen@rocketmail.com *
4			* *
5			* This program is free software; you can redistribute it and/or modify *
6			* it under the terms of the GNU General Public License as published by *
7			* the Free Software Foundation; either version 2 of the License, or *
8			* (at your option) any later version. *
9			***************************************************************************/
10			#include "dnshelper.h"
11
12			#include <sys/types.h>
13			#include <netdb.h>
14			#include <sys/socket.h>
15			#include <netinet/in.h>
16			#include <arpa/inet.h>
17
18			using std::string;
19
20			std::string DnsHelper::getIp(const std::string& hostname)
21			{
22			if ( hostname == "" )
23			return "";
24			hostent *hostptr = gethostbyname( hostname.c_str() );
25
26			if (hostptr == 0)
27			return ("");
28
29			in_addr *ptr;
30			char **listptr = hostptr->h_addr_list;
31			ptr = (struct in_addr ) listptr;
32
33			if (ptr == 0)
34			return "not found";
35			else
36			return inet_ntoa(*ptr);
37			}
38
39			std::string DnsHelper::getHostname(const std::string& ipaddress)
40			{
41			if ( ipaddress == "" )
42			return "";
43
44			sockaddr_in sin;
45
46			bzero( (caddr_t *) &sin,sizeof( sin ) ); // clear out the structure
47			sin.sin_family = AF_INET; // set the family (only AF_INET is valid
48			sin.sin_addr.s_addr = inet_addr( ipaddress.c_str() ); // convert from dottet decimal to 32 bit long int
49			hostent hostptr = gethostbyaddr( (char )&(sin.sin_addr), sizeof(sin.sin_addr), (int)sin.sin_family);
50
51			if (hostptr == 0)
52			return "not found";
53			else
54			return hostptr->h_name;
55			}