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DEFINITIONS
This source file includes following definitions.
- getipnodebyname
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 #ifdef HAVE_CONFIG_H
35 #include <config.h>
36 RCSID("$Id$");
37 #endif
38
39 #include "roken.h"
40
41 #ifndef HAVE_H_ERRNO
42 static int h_errno = NO_RECOVERY;
43 #endif
44
45 /*
46 * lookup `name' (address family `af') in DNS and return a pointer
47 * to a malloced struct hostent or NULL.
48 */
49
50 struct hostent * ROKEN_LIB_FUNCTION
51 getipnodebyname (const char *name, int af, int flags, int *error_num)
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52 {
53 struct hostent *tmp;
54
55 #ifdef HAVE_GETHOSTBYNAME2
56 tmp = gethostbyname2 (name, af);
57 #else
58 if (af != AF_INET) {
59 *error_num = NO_ADDRESS;
60 return NULL;
61 }
62 tmp = gethostbyname (name);
63 #endif
64 if (tmp == NULL) {
65 switch (h_errno) {
66 case HOST_NOT_FOUND :
67 case TRY_AGAIN :
68 case NO_RECOVERY :
69 *error_num = h_errno;
70 break;
71 case NO_DATA :
72 *error_num = NO_ADDRESS;
73 break;
74 default :
75 *error_num = NO_RECOVERY;
76 break;
77 }
78 return NULL;
79 }
80 tmp = copyhostent (tmp);
81 if (tmp == NULL) {
82 *error_num = TRY_AGAIN;
83 return NULL;
84 }
85 return tmp;
86 }