gai_strerror.c revision 158790 
1/*
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: head/lib/libc/net/gai_strerror.c 158790 2006-05-21 11:22:31Z ume $");
32
33#include <netdb.h>
34
35/* Entries EAI_ADDRFAMILY (1) and EAI_NODATA (7) are obsoleted, but left */
36/* for backward compatibility with userland code prior to 2553bis-02 */
37static const char *ai_errlist[] = {
38	"Success",					/* 0 */
39	"Address family for hostname not supported",	/* 1 */
40	"Temporary failure in name resolution",		/* EAI_AGAIN */
41	"Invalid value for ai_flags",			/* EAI_BADFLAGS */
42	"Non-recoverable failure in name resolution",	/* EAI_FAIL */
43	"ai_family not supported",			/* EAI_FAMILY */
44	"Memory allocation failure", 			/* EAI_MEMORY */
45	"No address associated with hostname",		/* 7 */
46	"hostname nor servname provided, or not known",	/* EAI_NONAME */
47	"servname not supported for ai_socktype",	/* EAI_SERVICE */
48	"ai_socktype not supported", 			/* EAI_SOCKTYPE */
49	"System error returned in errno", 		/* EAI_SYSTEM */
50	"Invalid value for hints",			/* EAI_BADHINTS */
51	"Resolved protocol is unknown",			/* EAI_PROTOCOL */
52	"Argument buffer overflow"			/* EAI_OVERFLOW */
53};
54
55const char *
56gai_strerror(int ecode)
57{
58	if (ecode >= 0 && ecode < EAI_MAX)
59		return ai_errlist[ecode];
60	return "Unknown error";
61}
62