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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: gai_strerror.c,v 1.2 2019/12/17 01:46:34 sthen Exp $ */
/*! \file gai_strerror.c
* gai_strerror() returns an error message corresponding to an
* error code returned by getaddrinfo() and getnameinfo(). The following error
* codes and their meaning are defined in
* \link netdb.h include/irs/netdb.h.\endlink
* This implementation is almost an exact copy of lwres/gai_sterror.c except
* that it catches up the latest API standard, RFC3493.
*
* \li #EAI_ADDRFAMILY address family for hostname not supported
* \li #EAI_AGAIN temporary failure in name resolution
* \li #EAI_BADFLAGS invalid value for ai_flags
* \li #EAI_FAIL non-recoverable failure in name resolution
* \li #EAI_FAMILY ai_family not supported
* \li #EAI_MEMORY memory allocation failure
* \li #EAI_NODATA no address associated with hostname (obsoleted in RFC3493)
* \li #EAI_NONAME hostname nor servname provided, or not known
* \li #EAI_SERVICE servname not supported for ai_socktype
* \li #EAI_SOCKTYPE ai_socktype not supported
* \li #EAI_SYSTEM system error returned in errno
* \li #EAI_BADHINTS Invalid value for hints (non-standard)
* \li #EAI_PROTOCOL Resolved protocol is unknown (non-standard)
* \li #EAI_OVERFLOW Argument buffer overflow
* \li #EAI_INSECUREDATA Insecure Data (experimental)
*
* The message invalid error code is returned if ecode is out of range.
*
* ai_flags, ai_family and ai_socktype are elements of the struct
* addrinfo used by lwres_getaddrinfo().
*
* \section gai_strerror_see See Also
*
* strerror(), getaddrinfo(), getnameinfo(), RFC3493.
*/
#include <config.h>
#include <isc/net.h>
#include <irs/netdb.h>
/*% Text of error messages. */
static const char *gai_messages[] = {
"no error",
"address family for hostname not supported",
"temporary failure in name resolution",
"invalid value for ai_flags",
"non-recoverable failure in name resolution",
"ai_family not supported",
"memory allocation failure",
"no address associated with hostname",
"hostname nor servname provided, or not known",
"servname not supported for ai_socktype",
"ai_socktype not supported",
"system error returned in errno",
"bad hints",
"bad protocol",
"argument buffer overflow",
"insecure data provided"
};
/*%
* Returns an error message corresponding to an error code returned by
* getaddrinfo() and getnameinfo()
*/
IRS_GAISTRERROR_RETURN_T
gai_strerror(int ecode) {
union {
const char *const_ptr;
char *deconst_ptr;
} ptr;
if ((ecode < 0) ||
(ecode >= (int)(sizeof(gai_messages)/sizeof(*gai_messages))))
ptr.const_ptr = "invalid error code";
else
ptr.const_ptr = gai_messages[ecode];
return (ptr.deconst_ptr);
}
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