source3/lib/util_names.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001-2007
   6    Copyright (C) Simo Sorce 2001
   7    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
   8    Copyright (C) James Peach 2006
   9    Copyright (C) Andrew Bartlett 2010-2011
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26
  27 /***********************************************************************
  28  Definitions for all names.
  29 ***********************************************************************/
  30
  31 static int smb_num_netbios_names;
  32 static char **smb_my_netbios_names;
  33
  34 static void free_netbios_names_array(void)
  35 {
  36         int i;
  37
  38         for (i = 0; i < smb_num_netbios_names; i++)
  39                 SAFE_FREE(smb_my_netbios_names[i]);
  40
  41         SAFE_FREE(smb_my_netbios_names);
  42         smb_num_netbios_names = 0;
  43 }
  44
  45 static bool allocate_my_netbios_names_array(size_t number)
  46 {
  47         free_netbios_names_array();
  48
  49         smb_num_netbios_names = number + 1;
  50         smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
  51
  52         if (!smb_my_netbios_names)
  53                 return False;
  54
  55         memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
  56         return True;
  57 }
  58
  59 static bool set_my_netbios_names(const char *name, int i)
  60 {
  61         SAFE_FREE(smb_my_netbios_names[i]);
  62
  63         /*
  64          * Don't include space for terminating '\0' in strndup,
  65          * it is automatically added. This screws up if the name
  66          * is greater than MAX_NETBIOSNAME_LEN-1 in the unix
  67          * charset, but less than or equal to MAX_NETBIOSNAME_LEN-1
  68          * in the DOS charset, but this is so old we have to live
  69          * with that.
  70          */
  71         smb_my_netbios_names[i] = SMB_STRNDUP(name, MAX_NETBIOSNAME_LEN-1);
  72         if (!smb_my_netbios_names[i])
  73                 return False;
  74         return strupper_m(smb_my_netbios_names[i]);
  75 }
  76
  77 /***********************************************************************
  78  Free memory allocated to global objects
  79 ***********************************************************************/
  80
  81 void gfree_names(void)
  82 {
  83         free_netbios_names_array();
  84         free_local_machine_name();
  85 }
  86
  87 const char *my_netbios_names(int i)
  88 {
  89         return smb_my_netbios_names[i];
  90 }
  91
  92 bool set_netbios_aliases(const char **str_array)
  93 {
  94         size_t namecount;
  95
  96         /* Work out the max number of netbios aliases that we have */
  97         for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
  98                 ;
  99
 100         if ( lp_netbios_name() && *lp_netbios_name())
 101                 namecount++;
 102
 103         /* Allocate space for the netbios aliases */
 104         if (!allocate_my_netbios_names_array(namecount))
 105                 return False;
 106
 107         /* Use the global_myname string first */
 108         namecount=0;
 109         if ( lp_netbios_name() && *lp_netbios_name()) {
 110                 set_my_netbios_names( lp_netbios_name(), namecount );
 111                 namecount++;
 112         }
 113
 114         if (str_array) {
 115                 size_t i;
 116                 for ( i = 0; str_array[i] != NULL; i++) {
 117                         size_t n;
 118                         bool duplicate = False;
 119
 120                         /* Look for duplicates */
 121                         for( n=0; n<namecount; n++ ) {
 122                                 if( strequal( str_array[i], my_netbios_names(n) ) ) {
 123                                         duplicate = True;
 124                                         break;
 125                                 }
 126                         }
 127                         if (!duplicate) {
 128                                 if (!set_my_netbios_names(str_array[i], namecount))
 129                                         return False;
 130                                 namecount++;
 131                         }
 132                 }
 133         }
 134         return True;
 135 }
 136
 137 /****************************************************************************
 138   Common name initialization code.
 139 ****************************************************************************/
 140
 141 bool init_names(void)
 142 {
 143         int n;
 144
 145         if (!set_netbios_aliases(lp_netbios_aliases())) {
 146                 DEBUG( 0, ( "init_names: malloc fail.\n" ) );
 147                 return False;
 148         }
 149
 150         set_local_machine_name(lp_netbios_name(),false);
 151
 152         DEBUG( 5, ("Netbios name list:-\n") );
 153         for( n=0; my_netbios_names(n); n++ ) {
 154                 DEBUGADD( 5, ("my_netbios_names[%d]=\"%s\"\n",
 155                                         n, my_netbios_names(n) ) );
 156         }
 157
 158         return( True );
 159 }
 160
 161 /******************************************************************
 162  get the default domain/netbios name to be used when dealing
 163  with our passdb list of accounts
 164 ******************************************************************/
 165
 166 const char *get_global_sam_name(void)
 167 {
 168         if (IS_DC) {
 169                 return lp_workgroup();
 170         }
 171         return lp_netbios_name();
 172 }
 173