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