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/* Nessuslib -- the Nessus Library
* Copyright (C) 1998 Renaud Deraison
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Hostname resolver.
*/
#define EXPORTING
#include <includes.h>
#include "resolve.h"
#ifndef __u32
#define __u32 unsigned long
#endif
#ifndef INADDR_NONE
#define INADDR_NONE 0xffffffff
#endif
ExtFunc int
host2ip(name, ip)
char * name;
struct in_addr * ip;
{
#undef HAVE_GETHOSTBYNAME_R
#ifdef HAVE_GETHOSTBYNAME_R
int Errno = 0;
char * buf = emalloc(4096);
struct hostent * res = NULL;
struct hostent * t = NULL;
struct hostent * myhostent;
myhostent = emalloc(sizeof(struct hostent));
#undef HAVE_SOLARIS_GETHOSTBYNAME_R
#ifdef HAVE_SOLARIS_GETHOSTBYNAME_R
gethostbyname_r(name, myhostent, buf, 4096, &Errno);
if(Errno){
efree(&myhostent);
efree(&buf);
return -1;
}
#else
gethostbyname_r(name, myhostent, buf, 4096, &res, &Errno);
t = myhostent;
myhostent = res;
#endif /* HAVE_SOLARIS_... */
memcpy(ip, myhostent->h_addr, myhostent->h_length);
efree(&myhostent);
efree(&buf);
return 0;
#else
struct hostent * ent;
ent = gethostbyname(name);
if(!ent)
return -1;
else if(ip) memcpy(ip, ent->h_addr, ent->h_length);
return 0; /* success */
#endif /* defined(GETHOSTBYNAME_R) */
}
struct in_addr
nn_resolve(name)
const char * name;
{
struct in_addr ret;
if(host2ip(name, &ret) < 0)
{
ret.s_addr = INADDR_NONE;
}
return ret;
}
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