gai_strerror.c revision d8845d7191ca81aae8aab4c29410fc8a3d012687 
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/*
31#include <sys/cdefs.h>
32
33__FBSDID("$FreeBSD: /repoman/r/ncvs/src/lib/libc/net/gai_strerror.c,v 1.1 2005/04/06 12:45:51 ume Exp $");
34
35*/
36
37#ifdef WIN32
38
39#include <ws2tcpip.h>
40
41#else
42
43#include <netdb.h>
44
45#endif
46
47/* Entries EAI_ADDRFAMILY (1) and EAI_NODATA (7) are obsoleted, but left */
48/* for backward compatibility with userland code prior to 2553bis-02 */
49static char *ai_errlist[] = {
50	"Success",					/* 0 */
51	"Address family for hostname not supported",	/* 1 */
52	"Temporary failure in name resolution",		/* EAI_AGAIN */
53	"Invalid value for ai_flags",			/* EAI_BADFLAGS */
54	"Non-recoverable failure in name resolution",	/* EAI_FAIL */
55	"ai_family not supported",			/* EAI_FAMILY */
56	"Memory allocation failure", 			/* EAI_MEMORY */
57	"No address associated with hostname",		/* 7 */
58	"hostname nor servname provided, or not known",	/* EAI_NONAME */
59	"servname not supported for ai_socktype",	/* EAI_SERVICE */
60	"ai_socktype not supported", 			/* EAI_SOCKTYPE */
61	"System error returned in errno", 		/* EAI_SYSTEM */
62	"Invalid value for hints",			/* EAI_BADHINTS */
63	"Resolved protocol is unknown"			/* EAI_PROTOCOL */
64};
65
66#ifndef EAI_MAX
67#define EAI_MAX (sizeof(ai_errlist)/sizeof(ai_errlist[0]))
68#endif
69
70/* on MingW, gai_strerror is available.
71   We need to compile gai_strerrorA only for Cygwin
72 */
73#ifndef gai_strerror
74
75char *
76WSAAPI gai_strerrorA(int ecode)
77{
78	if (ecode >= 0 && ecode < EAI_MAX)
79		return ai_errlist[ecode];
80	return "Unknown error";
81}
82
83#endif /* gai_strerror */