1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "namespace.h" 36 #include <netdb.h> 37 #if defined(NLS) 38 #include <nl_types.h> 39 #include <errno.h> 40 #include <limits.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include "reentrant.h" 44 #endif 45 #include "un-namespace.h" 46 47 /* 48 * Entries EAI_ADDRFAMILY (1) and EAI_NODATA (7) were omitted from RFC 3493, 49 * but are or may be used as extensions or in old code. 50 */ 51 static const char *ai_errlist[] = { 52 "Success", /* 0 */ 53 "Address family for hostname not supported", /* EAI_ADDRFAMILY */ 54 "Name could not be resolved at this time", /* EAI_AGAIN */ 55 "Flags parameter had an invalid value", /* EAI_BADFLAGS */ 56 "Non-recoverable failure in name resolution", /* EAI_FAIL */ 57 "Address family not recognized", /* EAI_FAMILY */ 58 "Memory allocation failure", /* EAI_MEMORY */ 59 "No address associated with hostname", /* EAI_NODATA*/ 60 "Name does not resolve", /* EAI_NONAME */ 61 "Service was not recognized for socket type", /* EAI_SERVICE */ 62 "Intended socket type was not recognized", /* EAI_SOCKTYPE */ 63 "System error returned in errno", /* EAI_SYSTEM */ 64 "Invalid value for hints", /* EAI_BADHINTS */ 65 "Resolved protocol is unknown", /* EAI_PROTOCOL */ 66 "Argument buffer overflow" /* EAI_OVERFLOW */ 67 }; 68 69 #if defined(NLS) 70 static char gai_buf[NL_TEXTMAX]; 71 static once_t gai_init_once = ONCE_INITIALIZER; 72 static thread_key_t gai_key; 73 static int gai_keycreated = 0; 74 75 static void 76 gai_keycreate(void) 77 { 78 gai_keycreated = (thr_keycreate(&gai_key, free) == 0); 79 } 80 #endif 81 82 const char * 83 gai_strerror(int ecode) 84 { 85 #if defined(NLS) 86 nl_catd catd; 87 char *buf; 88 89 if (thr_main() != 0) 90 buf = gai_buf; 91 else { 92 if (thr_once(&gai_init_once, gai_keycreate) != 0 || 93 !gai_keycreated) 94 goto thr_err; 95 if ((buf = thr_getspecific(gai_key)) == NULL) { 96 if ((buf = malloc(sizeof(gai_buf))) == NULL) 97 goto thr_err; 98 if (thr_setspecific(gai_key, buf) != 0) { 99 free(buf); 100 goto thr_err; 101 } 102 } 103 } 104 105 catd = catopen("libc", NL_CAT_LOCALE); 106 if (ecode > 0 && ecode < EAI_MAX) 107 strlcpy(buf, catgets(catd, 3, ecode, ai_errlist[ecode]), 108 sizeof(gai_buf)); 109 else if (ecode == 0) 110 strlcpy(buf, catgets(catd, 3, NL_MSGMAX - 1, "Success"), 111 sizeof(gai_buf)); 112 else 113 strlcpy(buf, catgets(catd, 3, NL_MSGMAX, "Unknown error"), 114 sizeof(gai_buf)); 115 catclose(catd); 116 return buf; 117 118 thr_err: 119 #endif 120 if (ecode >= 0 && ecode < EAI_MAX) 121 return ai_errlist[ecode]; 122 return "Unknown error"; 123 } 124