/contrib/bind9/lib/lwres/gai_strerror.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 83 lines · 31 code · 7 blank · 45 comment · 1 complexity · 85ac0b9c0453ddfc87517df63ab523fa MD5 · raw file
- /*
- * Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 2000, 2001 Internet Software Consortium.
- *
- * 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 1.22 2007/06/19 23:47:22 tbox Exp $ */
- /*! \file gai_strerror.c
- * lwres_gai_strerror() returns an error message corresponding to an
- * error code returned by getaddrinfo(). The following error codes and
- * their meaning are defined in \link netdb.h include/lwres/netdb.h.\endlink
- *
- * \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
- * \li #EAI_NONAME hostname or servname not 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
- *
- * 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, lwres_getaddrinfo(), getaddrinfo(), RFC2133.
- */
- #include <config.h>
- #include <lwres/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"
- };
- /*% Returns an error message corresponding to an error code returned by getaddrinfo() */
- char *
- lwres_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);
- }