84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
/*
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* Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 2000, 2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: gai_strerror.c,v 1.22 2007/06/19 23:47:22 tbox Exp $ */
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/*! \file gai_strerror.c
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* lwres_gai_strerror() returns an error message corresponding to an
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* error code returned by getaddrinfo(). The following error codes and
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* their meaning are defined in \link netdb.h include/lwres/netdb.h.\endlink
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*
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* \li #EAI_ADDRFAMILY address family for hostname not supported
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* \li #EAI_AGAIN temporary failure in name resolution
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* \li #EAI_BADFLAGS invalid value for #ai_flags
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* \li #EAI_FAIL non-recoverable failure in name resolution
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* \li #EAI_FAMILY ai_family not supported
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* \li #EAI_MEMORY memory allocation failure
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* \li #EAI_NODATA no address associated with hostname
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* \li #EAI_NONAME hostname or servname not provided, or not known
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* \li #EAI_SERVICE servname not supported for ai_socktype
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* \li #EAI_SOCKTYPE ai_socktype not supported
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* \li #EAI_SYSTEM system error returned in errno
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*
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* The message invalid error code is returned if ecode is out of range.
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*
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* ai_flags, ai_family and ai_socktype are elements of the struct
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* addrinfo used by lwres_getaddrinfo().
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*
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* \section gai_strerror_see See Also
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*
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* strerror, lwres_getaddrinfo(), getaddrinfo(), RFC2133.
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*/
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#include <config.h>
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#include <lwres/netdb.h>
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/*% Text of error messages. */
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static const char *gai_messages[] = {
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"no error",
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"address family for hostname not supported",
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"temporary failure in name resolution",
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"invalid value for ai_flags",
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"non-recoverable failure in name resolution",
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"ai_family not supported",
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"memory allocation failure",
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"no address associated with hostname",
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"hostname nor servname provided, or not known",
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"servname not supported for ai_socktype",
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"ai_socktype not supported",
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"system error returned in errno",
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"bad hints",
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"bad protocol"
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};
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/*% Returns an error message corresponding to an error code returned by getaddrinfo() */
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char *
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lwres_gai_strerror(int ecode) {
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union {
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const char *const_ptr;
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char *deconst_ptr;
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} ptr;
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if ((ecode < 0) ||
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(ecode >= (int)(sizeof(gai_messages)/sizeof(*gai_messages))))
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ptr.const_ptr = "invalid error code";
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else
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ptr.const_ptr = gai_messages[ecode];
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return (ptr.deconst_ptr);
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}
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