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
43 ROKEN_LIB_FUNCTION struct hostent * ROKEN_LIB_CALL
getipnodebyaddr(const void * src,size_t len,int af,int * error_num)44 getipnodebyaddr (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