nis/nis_getservlist.c

   1 /* Copyright (c) 1997-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <string.h>
  19 #include <rpcsvc/nis.h>
  20 #include <shlib-compat.h>
  21
  22 #include "nis_xdr.h"
  23 #include "nis_intern.h"
  24
  25 nis_server **
  26 nis_getservlist (const_nis_name dir)
  27 {
  28   nis_result *res;
  29   nis_server **serv;
  30
  31   res = nis_lookup (dir, FOLLOW_LINKS);
  32
  33   if (res != NULL && NIS_RES_STATUS (res) == NIS_SUCCESS)
  34     {
  35       unsigned long i;
  36       nis_server *server;
  37
  38       serv =
  39         malloc (sizeof (nis_server *) *
  40                 (NIS_RES_OBJECT (res)->DI_data.do_servers.do_servers_len + 1));
  41       if (__glibc_unlikely (serv == NULL))
  42         {
  43           nis_freeresult (res);
  44           return NULL;
  45         }
  46
  47       for (i = 0; i < NIS_RES_OBJECT (res)->DI_data.do_servers.do_servers_len;
  48            ++i)
  49         {
  50           server =
  51             &NIS_RES_OBJECT (res)->DI_data.do_servers.do_servers_val[i];
  52           serv[i] = calloc (1, sizeof (nis_server));
  53           if (__glibc_unlikely (serv[i] == NULL))
  54             {
  55             free_all:
  56               while (i-- > 0)
  57                 {
  58                   free (serv[i]->pkey.n_bytes);
  59                   if (serv[i]->ep.ep_val != NULL)
  60                     {
  61                       unsigned long int j;
  62                       for (j = 0; j < serv[i]->ep.ep_len; ++j)
  63                         {
  64                           free (serv[i]->ep.ep_val[j].proto);
  65                           free (serv[i]->ep.ep_val[j].family);
  66                           free (serv[i]->ep.ep_val[j].uaddr);
  67                         }
  68                       free (serv[i]->ep.ep_val);
  69                     }
  70                   free (serv[i]->name);
  71                   free (serv[i]);
  72                 }
  73
  74               free (serv);
  75
  76               nis_freeresult (res);
  77
  78               return NULL;
  79             }
  80
  81           if (server->name != NULL)
  82             {
  83               serv[i]->name = strdup (server->name);
  84               if (__glibc_unlikely (serv[i]->name == NULL))
  85                 {
  86                   ++i;
  87                   goto free_all;
  88                 }
  89             }
  90
  91           serv[i]->ep.ep_len = server->ep.ep_len;
  92           if (serv[i]->ep.ep_len > 0)
  93             {
  94               unsigned long int j;
  95
  96               serv[i]->ep.ep_val =
  97                 malloc (server->ep.ep_len * sizeof (endpoint));
  98               if (__glibc_unlikely (serv[i]->ep.ep_val == NULL))
  99                 {
 100                   ++i;
 101                   goto free_all;
 102                 }
 103
 104               for (j = 0; j < serv[i]->ep.ep_len; ++j)
 105                 {
 106                   if (server->ep.ep_val[j].uaddr)
 107                     serv[i]->ep.ep_val[j].uaddr =
 108                       strdup (server->ep.ep_val[j].uaddr);
 109                   else
 110                     serv[i]->ep.ep_val[j].uaddr = NULL;
 111                   if (server->ep.ep_val[j].family)
 112                     serv[i]->ep.ep_val[j].family =
 113                       strdup (server->ep.ep_val[j].family);
 114                   else
 115                     serv[i]->ep.ep_val[j].family = NULL;
 116                   if (server->ep.ep_val[j].proto)
 117                     serv[i]->ep.ep_val[j].proto =
 118                       strdup (server->ep.ep_val[j].proto);
 119                   else
 120                     serv[i]->ep.ep_val[j].proto = NULL;
 121                 }
 122             }
 123
 124           serv[i]->key_type = server->key_type;
 125           serv[i]->pkey.n_len = server->pkey.n_len;
 126           if (server->pkey.n_len > 0)
 127             {
 128               serv[i]->pkey.n_bytes = malloc (server->pkey.n_len);
 129               if (__glibc_unlikely (serv[i]->pkey.n_bytes == NULL))
 130                 {
 131                   ++i;
 132                   goto free_all;
 133                 }
 134               memcpy (serv[i]->pkey.n_bytes, server->pkey.n_bytes,
 135                       server->pkey.n_len);
 136             }
 137         }
 138       serv[i] = NULL;
 139     }
 140   else
 141     {
 142       serv = malloc (sizeof (nis_server *));
 143       if (__glibc_unlikely (serv != NULL))
 144         serv[0] = NULL;
 145     }
 146
 147   nis_freeresult (res);
 148
 149   return serv;
 150 }
 151 libnsl_hidden_nolink_def (nis_getservlist, GLIBC_2_1)
 152
 153 void
 154 nis_freeservlist (nis_server **serv)
 155 {
 156   int i;
 157
 158   if (serv == NULL)
 159     return;
 160
 161   i = 0;
 162   while (serv[i] != NULL)
 163     {
 164       xdr_free ((xdrproc_t)_xdr_nis_server, (char *)serv[i]);
 165       free (serv[i]);
 166       ++i;
 167     }
 168   free (serv);
 169 }
 170 libnsl_hidden_nolink_def (nis_freeservlist, GLIBC_2_1)