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