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/*
* Copyright (c) 1999 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
RCSID("$Id: getipnodebyname.c,v 1.4 2005/04/12 11:28:47 lha Exp $");
#endif
#include <roken.h>
#ifndef HAVE_H_ERRNO
static int h_errno = NO_RECOVERY;
#endif
/*
* lookup `name' (address family `af') in DNS and return a pointer
* to a malloced struct hostent or NULL.
*/
struct hostent * ROKEN_LIB_FUNCTION
getipnodebyname (const char *name, int af, int flags, int *error_num)
{
struct hostent *tmp;
#ifdef HAVE_GETHOSTBYNAME2
tmp = gethostbyname2 (name, af);
#else
if (af != AF_INET) {
*error_num = NO_ADDRESS;
return NULL;
}
tmp = gethostbyname (name);
#endif
if (tmp == NULL) {
switch (h_errno) {
case HOST_NOT_FOUND :
case TRY_AGAIN :
case NO_RECOVERY :
*error_num = h_errno;
break;
case NO_DATA :
*error_num = NO_ADDRESS;
break;
default :
*error_num = NO_RECOVERY;
break;
}
return NULL;
}
tmp = copyhostent (tmp);
if (tmp == NULL) {
*error_num = TRY_AGAIN;
return NULL;
}
return tmp;
}
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