1/* 2 * Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (C) 2000, 2001 Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15 * PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18/* $Id: gai_strerror.c,v 1.22 2007/06/19 23:47:22 tbox Exp $ */ 19 20/*! \file gai_strerror.c 21 * lwres_gai_strerror() returns an error message corresponding to an 22 * error code returned by getaddrinfo(). The following error codes and 23 * their meaning are defined in \link netdb.h include/lwres/netdb.h.\endlink 24 * 25 * \li #EAI_ADDRFAMILY address family for hostname not supported 26 * \li #EAI_AGAIN temporary failure in name resolution 27 * \li #EAI_BADFLAGS invalid value for #ai_flags 28 * \li #EAI_FAIL non-recoverable failure in name resolution 29 * \li #EAI_FAMILY ai_family not supported 30 * \li #EAI_MEMORY memory allocation failure 31 * \li #EAI_NODATA no address associated with hostname 32 * \li #EAI_NONAME hostname or servname not provided, or not known 33 * \li #EAI_SERVICE servname not supported for ai_socktype 34 * \li #EAI_SOCKTYPE ai_socktype not supported 35 * \li #EAI_SYSTEM system error returned in errno 36 * 37 * The message invalid error code is returned if ecode is out of range. 38 * 39 * ai_flags, ai_family and ai_socktype are elements of the struct 40 * addrinfo used by lwres_getaddrinfo(). 41 * 42 * \section gai_strerror_see See Also 43 * 44 * strerror, lwres_getaddrinfo(), getaddrinfo(), RFC2133. 45 */ 46 47#include <config.h> 48 49#include <lwres/netdb.h> 50 51/*% Text of error messages. */ 52static const char *gai_messages[] = { 53 "no error", 54 "address family for hostname not supported", 55 "temporary failure in name resolution", 56 "invalid value for ai_flags", 57 "non-recoverable failure in name resolution", 58 "ai_family not supported", 59 "memory allocation failure", 60 "no address associated with hostname", 61 "hostname nor servname provided, or not known", 62 "servname not supported for ai_socktype", 63 "ai_socktype not supported", 64 "system error returned in errno", 65 "bad hints", 66 "bad protocol" 67}; 68 69/*% Returns an error message corresponding to an error code returned by getaddrinfo() */ 70char * 71lwres_gai_strerror(int ecode) { 72 union { 73 const char *const_ptr; 74 char *deconst_ptr; 75 } ptr; 76 77 if ((ecode < 0) || 78 (ecode >= (int)(sizeof(gai_messages)/sizeof(*gai_messages)))) 79 ptr.const_ptr = "invalid error code"; 80 else 81 ptr.const_ptr = gai_messages[ecode]; 82 return (ptr.deconst_ptr); 83} 84