1/*	$NetBSD: getipnodebyaddr.c,v 1.2 2017/01/28 21:31:50 christos Exp $	*/
2
3/*
4 * Copyright (c) 1999 Kungliga Tekniska H��gskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <config.h>
37
38#include <krb5/roken.h>
39
40/*
41 * lookup `src, len' (address family `af') in DNS and return a pointer
42 * to a malloced struct hostent or NULL.
43 */
44
45ROKEN_LIB_FUNCTION struct hostent * ROKEN_LIB_CALL
46getipnodebyaddr (const void *src, size_t len, int af, int *error_num)
47{
48    struct hostent *tmp;
49
50    tmp = gethostbyaddr (src, len, af);
51    if (tmp == NULL) {
52	switch (h_errno) {
53	case HOST_NOT_FOUND :
54	case TRY_AGAIN :
55	case NO_RECOVERY :
56	    *error_num = h_errno;
57	    break;
58	case NO_DATA :
59	    *error_num = NO_ADDRESS;
60	    break;
61	default :
62	    *error_num = NO_RECOVERY;
63	    break;
64	}
65	return NULL;
66    }
67    tmp = copyhostent (tmp);
68    if (tmp == NULL) {
69	*error_num = TRY_AGAIN;
70	return NULL;
71    }
72    return tmp;
73}
74