84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#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.
|
|
*/
|
|
|
|
ROKEN_LIB_FUNCTION struct hostent * ROKEN_LIB_CALL
|
|
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;
|
|
}
|