lib/libc/net/gai_strerror.c

   1 /*
   2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the project nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/lib/libc/net/gai_strerror.c,v 1.2 2006/05/21 11:22:31 ume Exp $
  30  */
  31
  32 #include <netdb.h>
  33
  34 /* Entries EAI_ADDRFAMILY (1) and EAI_NODATA (7) are obsoleted, but left */
  35 /* for backward compatibility with userland code prior to 2553bis-02 */
  36 static const char *ai_errlist[] = {
  37         "Success",                                      /* 0 */
  38         "Address family for hostname not supported",    /* 1 */
  39         "Temporary failure in name resolution",         /* EAI_AGAIN */
  40         "Invalid value for ai_flags",                   /* EAI_BADFLAGS */
  41         "Non-recoverable failure in name resolution",   /* EAI_FAIL */
  42         "ai_family not supported",                      /* EAI_FAMILY */
  43         "Memory allocation failure",                    /* EAI_MEMORY */
  44         "No address associated with hostname",          /* 7 */
  45         "hostname nor servname provided, or not known", /* EAI_NONAME */
  46         "servname not supported for ai_socktype",       /* EAI_SERVICE */
  47         "ai_socktype not supported",                    /* EAI_SOCKTYPE */
  48         "System error returned in errno",               /* EAI_SYSTEM */
  49         "Invalid value for hints",                      /* EAI_BADHINTS */
  50         "Resolved protocol is unknown",                 /* EAI_PROTOCOL */
  51         "Argument buffer overflow"                      /* EAI_OVERFLOW */
  52 };
  53
  54 const char *
  55 gai_strerror(int ecode)
  56 {
  57         if (ecode >= 0 && ecode < EAI_MAX)
  58                 return ai_errlist[ecode];
  59         return "Unknown error";
  60 }