xref: /openbsd-src/lib/libc/net/gai_strerror.c (revision 92f92416a760bb79f2f16ad47c271c9e61681f4b)
1 /*	$OpenBSD: gai_strerror.c,v 1.4 1999/12/30 08:54:20 itojun Exp $	*/
2 
3 /*
4  * %%% copyright-cmetz-97-bsd
5  * Copyright (c) 1997-1999, Craig Metz, All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. All advertising materials mentioning features or use of this software
16  *    must display the following acknowledgement:
17  *      This product includes software developed by Craig Metz and
18  *      by other contributors.
19  * 4. Neither the name of the author nor the names of 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 REGENTS 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 REGENTS 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 /* gai_strerror() v1.38 */
37 
38 #include <sys/types.h>
39 #include <netdb.h>
40 #include <errno.h>
41 
42 char *
43 gai_strerror(int errnum)
44 {
45 	switch (errnum) {
46 	case 0:
47 		return "no error";
48 	case EAI_BADFLAGS:
49 		return "invalid value for ai_flags";
50 	case EAI_NONAME:
51 		return "name or service is not known";
52 	case EAI_AGAIN:
53 		return "temporary failure in name resolution";
54 	case EAI_FAIL:
55 		return "non-recoverable failure in name resolution";
56 	case EAI_NODATA:
57 		return "no address associated with name";
58 	case EAI_FAMILY:
59 		return "ai_family not supported";
60 	case EAI_SOCKTYPE:
61 		return "ai_socktype not supported";
62 	case EAI_SERVICE:
63 		return "service not supported for ai_socktype";
64 	case EAI_ADDRFAMILY:
65 		return "address family for name not supported";
66 	case EAI_MEMORY:
67 		return "memory allocation failure";
68 	case EAI_SYSTEM:
69 		return "system error";
70 	case EAI_BADHINTS:
71 		return "invalid value for hints";
72 	case EAI_PROTOCOL:
73 		return "resolved protocol is unknown";
74 	default:
75 		return "unknown/invalid error";
76 	}
77 }
78