lib/roken/gai_strerror.c

   1 /*
   2  * Copyright (c) 1999 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <config.h>
  35
  36 #include "roken.h"
  37
  38 static struct gai_error {
  39     int code;
  40     const char *str;
  41 } errors[] = {
  42 {EAI_NOERROR,           "no error"},
  43 #ifdef EAI_ADDRFAMILY
  44 {EAI_ADDRFAMILY,        "address family for nodename not supported"},
  45 #endif
  46 {EAI_AGAIN,             "temporary failure in name resolution"},
  47 {EAI_BADFLAGS,          "invalid value for ai_flags"},
  48 {EAI_FAIL,              "non-recoverable failure in name resolution"},
  49 {EAI_FAMILY,            "ai_family not supported"},
  50 {EAI_MEMORY,            "memory allocation failure"},
  51 #ifdef EAI_NODATA
  52 {EAI_NODATA,            "no address associated with nodename"},
  53 #endif
  54 {EAI_NONAME,            "nodename nor servname provided, or not known"},
  55 {EAI_SERVICE,           "servname not supported for ai_socktype"},
  56 {EAI_SOCKTYPE,          "ai_socktype not supported"},
  57 {EAI_SYSTEM,            "system error returned in errno"},
  58 {0,                     NULL},
  59 };
  60
  61 /*
  62  *
  63  */
  64
  65 ROKEN_LIB_FUNCTION const char * ROKEN_LIB_CALL
  66 gai_strerror(int ecode)
  67 {
  68     struct gai_error *g;
  69
  70     for (g = errors; g->str != NULL; ++g)
  71         if (g->code == ecode)
  72             return g->str;
  73     return "unknown error code in gai_strerror";
  74 }