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	/***************************************************************************
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	}