1 /* $NetBSD: gai_strerror.c,v 1.5 2014/12/10 04:37:59 christos Exp $ */
2
3 /*
4 * Copyright (C) 2009, 2014 Internet Systems Consortium, Inc. ("ISC")
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
11 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
12 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
13 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
14 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
15 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
16 * PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 /* Id: gai_strerror.c,v 1.5 2009/09/02 23:48:02 tbox Exp */
20
21 /*! \file gai_strerror.c
22 * gai_strerror() returns an error message corresponding to an
23 * error code returned by getaddrinfo() and getnameinfo(). The following error
24 * codes and their meaning are defined in
25 * \link netdb.h include/irs/netdb.h.\endlink
26 * This implementation is almost an exact copy of lwres/gai_sterror.c except
27 * that it catches up the latest API standard, RFC3493.
28 *
29 * \li #EAI_ADDRFAMILY address family for hostname not supported
30 * \li #EAI_AGAIN temporary failure in name resolution
31 * \li #EAI_BADFLAGS invalid value for ai_flags
32 * \li #EAI_FAIL non-recoverable failure in name resolution
33 * \li #EAI_FAMILY ai_family not supported
34 * \li #EAI_MEMORY memory allocation failure
35 * \li #EAI_NODATA no address associated with hostname (obsoleted in RFC3493)
36 * \li #EAI_NONAME hostname nor servname provided, or not known
37 * \li #EAI_SERVICE servname not supported for ai_socktype
38 * \li #EAI_SOCKTYPE ai_socktype not supported
39 * \li #EAI_SYSTEM system error returned in errno
40 * \li #EAI_BADHINTS Invalid value for hints (non-standard)
41 * \li #EAI_PROTOCOL Resolved protocol is unknown (non-standard)
42 * \li #EAI_OVERFLOW Argument buffer overflow
43 * \li #EAI_INSECUREDATA Insecure Data (experimental)
44 *
45 * The message invalid error code is returned if ecode is out of range.
46 *
47 * ai_flags, ai_family and ai_socktype are elements of the struct
48 * addrinfo used by lwres_getaddrinfo().
49 *
50 * \section gai_strerror_see See Also
51 *
52 * strerror(), getaddrinfo(), getnameinfo(), RFC3493.
53 */
54 #include <config.h>
55
56 #include <isc/net.h>
57
58 #include <irs/netdb.h>
59
60 /*% Text of error messages. */
61 static const char *gai_messages[] = {
62 "no error",
63 "address family for hostname not supported",
64 "temporary failure in name resolution",
65 "invalid value for ai_flags",
66 "non-recoverable failure in name resolution",
67 "ai_family not supported",
68 "memory allocation failure",
69 "no address associated with hostname",
70 "hostname nor servname provided, or not known",
71 "servname not supported for ai_socktype",
72 "ai_socktype not supported",
73 "system error returned in errno",
74 "bad hints",
75 "bad protocol",
76 "argument buffer overflow",
77 "insecure data provided"
78 };
79
80 /*%
81 * Returns an error message corresponding to an error code returned by
82 * getaddrinfo() and getnameinfo()
83 */
84 IRS_GAISTRERROR_RETURN_T
gai_strerror(int ecode)85 gai_strerror(int ecode) {
86 union {
87 const char *const_ptr;
88 char *deconst_ptr;
89 } ptr;
90
91 if ((ecode < 0) ||
92 (ecode >= (int)(sizeof(gai_messages)/sizeof(*gai_messages))))
93 ptr.const_ptr = "invalid error code";
94 else
95 ptr.const_ptr = gai_messages[ecode];
96 return (ptr.deconst_ptr);
97 }
98