1 /* $NetBSD: getipnodebyname.c,v 1.1.1.1 2011/04/13 18:15:41 elric Exp $ */
2
3 /*
4 * Copyright (c) 1999 Kungliga Tekniska Högskolan
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 #ifndef HAVE_H_ERRNO
41 static int h_errno = NO_RECOVERY;
42 #endif
43
44 /*
45 * lookup `name' (address family `af') in DNS and return a pointer
46 * to a malloced struct hostent or NULL.
47 */
48
49 ROKEN_LIB_FUNCTION struct hostent * ROKEN_LIB_CALL
getipnodebyname(const char * name,int af,int flags,int * error_num)50 getipnodebyname (const char *name, int af, int flags, int *error_num)
51 {
52 struct hostent *tmp;
53
54 #ifdef HAVE_GETHOSTBYNAME2
55 tmp = gethostbyname2 (name, af);
56 #else
57 if (af != AF_INET) {
58 *error_num = NO_ADDRESS;
59 return NULL;
60 }
61 tmp = gethostbyname (name);
62 #endif
63 if (tmp == NULL) {
64 switch (h_errno) {
65 case HOST_NOT_FOUND :
66 case TRY_AGAIN :
67 case NO_RECOVERY :
68 *error_num = h_errno;
69 break;
70 case NO_DATA :
71 *error_num = NO_ADDRESS;
72 break;
73 default :
74 *error_num = NO_RECOVERY;
75 break;
76 }
77 return NULL;
78 }
79 tmp = copyhostent (tmp);
80 if (tmp == NULL) {
81 *error_num = TRY_AGAIN;
82 return NULL;
83 }
84 return tmp;
85 }
86