nis/nis_getservlist.c

   1 /* Copyright (c) 1997-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <string.h>
  20 #include <rpcsvc/nis.h>
  21 #include <shlib-compat.h>
  22
  23 #include "nis_xdr.h"
  24 #include "nis_intern.h"
  25
  26 nis_server **
  27 nis_getservlist (const_nis_name dir)
  28 {
  29   nis_result *res;
  30   nis_server **serv;
  31
  32   res = nis_lookup (dir, FOLLOW_LINKS);
  33
  34   if (res != NULL && NIS_RES_STATUS (res) == NIS_SUCCESS)
  35     {
  36       unsigned long i;
  37       nis_server *server;
  38
  39       serv =
  40         malloc (sizeof (nis_server *) *
  41                 (NIS_RES_OBJECT (res)->DI_data.do_servers.do_servers_len + 1));
  42       if (__glibc_unlikely (serv == NULL))
  43         {
  44           nis_freeresult (res);
  45           return NULL;
  46         }
  47
  48       for (i = 0; i < NIS_RES_OBJECT (res)->DI_data.do_servers.do_servers_len;
  49            ++i)
  50         {
  51           server =
  52             &NIS_RES_OBJECT (res)->DI_data.do_servers.do_servers_val[i];
  53           serv[i] = calloc (1, sizeof (nis_server));
  54           if (__glibc_unlikely (serv[i] == NULL))
  55             {
  56             free_all:
  57               while (i-- > 0)
  58                 {
  59                   free (serv[i]->pkey.n_bytes);
  60                   if (serv[i]->ep.ep_val != NULL)
  61                     {
  62                       unsigned long int j;
  63                       for (j = 0; j < serv[i]->ep.ep_len; ++j)
  64                         {
  65                           free (serv[i]->ep.ep_val[j].proto);
  66                           free (serv[i]->ep.ep_val[j].family);
  67                           free (serv[i]->ep.ep_val[j].uaddr);
  68                         }
  69                       free (serv[i]->ep.ep_val);
  70                     }
  71                   free (serv[i]->name);
  72                   free (serv[i]);
  73                 }
  74
  75               free (serv);
  76
  77               nis_freeresult (res);
  78
  79               return NULL;
  80             }
  81
  82           if (server->name != NULL)
  83             {
  84               serv[i]->name = strdup (server->name);
  85               if (__glibc_unlikely (serv[i]->name == NULL))
  86                 {
  87                   ++i;
  88                   goto free_all;
  89                 }
  90             }
  91
  92           serv[i]->ep.ep_len = server->ep.ep_len;
  93           if (serv[i]->ep.ep_len > 0)
  94             {
  95               unsigned long int j;
  96
  97               serv[i]->ep.ep_val =
  98                 malloc (server->ep.ep_len * sizeof (endpoint));
  99               if (__glibc_unlikely (serv[i]->ep.ep_val == NULL))
 100                 {
 101                   ++i;
 102                   goto free_all;
 103                 }
 104
 105               for (j = 0; j < serv[i]->ep.ep_len; ++j)
 106                 {
 107                   if (server->ep.ep_val[j].uaddr)
 108                     serv[i]->ep.ep_val[j].uaddr =
 109                       strdup (server->ep.ep_val[j].uaddr);
 110                   else
 111                     serv[i]->ep.ep_val[j].uaddr = NULL;
 112                   if (server->ep.ep_val[j].family)
 113                     serv[i]->ep.ep_val[j].family =
 114                       strdup (server->ep.ep_val[j].family);
 115                   else
 116                     serv[i]->ep.ep_val[j].family = NULL;
 117                   if (server->ep.ep_val[j].proto)
 118                     serv[i]->ep.ep_val[j].proto =
 119                       strdup (server->ep.ep_val[j].proto);
 120                   else
 121                     serv[i]->ep.ep_val[j].proto = NULL;
 122                 }
 123             }
 124
 125           serv[i]->key_type = server->key_type;
 126           serv[i]->pkey.n_len = server->pkey.n_len;
 127           if (server->pkey.n_len > 0)
 128             {
 129               serv[i]->pkey.n_bytes = malloc (server->pkey.n_len);
 130               if (__glibc_unlikely (serv[i]->pkey.n_bytes == NULL))
 131                 {
 132                   ++i;
 133                   goto free_all;
 134                 }
 135               memcpy (serv[i]->pkey.n_bytes, server->pkey.n_bytes,
 136                       server->pkey.n_len);
 137             }
 138         }
 139       serv[i] = NULL;
 140     }
 141   else
 142     {
 143       serv = malloc (sizeof (nis_server *));
 144       if (__glibc_unlikely (serv != NULL))
 145         serv[0] = NULL;
 146     }
 147
 148   nis_freeresult (res);
 149
 150   return serv;
 151 }
 152 libnsl_hidden_nolink_def (nis_getservlist, GLIBC_2_1)
 153
 154 void
 155 nis_freeservlist (nis_server **serv)
 156 {
 157   int i;
 158
 159   if (serv == NULL)
 160     return;
 161
 162   i = 0;
 163   while (serv[i] != NULL)
 164     {
 165       xdr_free ((xdrproc_t)_xdr_nis_server, (char *)serv[i]);
 166       free (serv[i]);
 167       ++i;
 168     }
 169   free (serv);
 170 }
 171 libnsl_hidden_nolink_def (nis_freeservlist, GLIBC_2_1)