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 }
  85
  86 const char *my_netbios_names(int i)
  87 {
  88         return smb_my_netbios_names[i];
  89 }
  90
  91 bool set_netbios_aliases(const char **str_array)
  92 {
  93         size_t namecount;
  94
  95         /* Work out the max number of netbios aliases that we have */
  96         for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
  97                 ;
  98
  99         if ( lp_netbios_name() && *lp_netbios_name())
 100                 namecount++;
 101
 102         /* Allocate space for the netbios aliases */
 103         if (!allocate_my_netbios_names_array(namecount))
 104                 return False;
 105
 106         /* Use the global_myname string first */
 107         namecount=0;
 108         if ( lp_netbios_name() && *lp_netbios_name()) {
 109                 set_my_netbios_names( lp_netbios_name(), namecount );
 110                 namecount++;
 111         }
 112
 113         if (str_array) {
 114                 size_t i;
 115                 for ( i = 0; str_array[i] != NULL; i++) {
 116                         size_t n;
 117                         bool duplicate = False;
 118
 119                         /* Look for duplicates */
 120                         for( n=0; n<namecount; n++ ) {
 121                                 if( strequal( str_array[i], my_netbios_names(n) ) ) {
 122                                         duplicate = True;
 123                                         break;
 124                                 }
 125                         }
 126                         if (!duplicate) {
 127                                 if (!set_my_netbios_names(str_array[i], namecount))
 128                                         return False;
 129                                 namecount++;
 130                         }
 131                 }
 132         }
 133         return True;
 134 }
 135
 136 /****************************************************************************
 137   Common name initialization code.
 138 ****************************************************************************/
 139
 140 bool init_names(void)
 141 {
 142         int n;
 143
 144         if (!set_netbios_aliases(lp_netbios_aliases())) {
 145                 DEBUG( 0, ( "init_names: malloc fail.\n" ) );
 146                 return False;
 147         }
 148
 149         DEBUG( 5, ("Netbios name list:-\n") );
 150         for( n=0; my_netbios_names(n); n++ ) {
 151                 DEBUGADD( 5, ("my_netbios_names[%d]=\"%s\"\n",
 152                                         n, my_netbios_names(n) ) );
 153         }
 154
 155         return( True );
 156 }
 157
 158 /******************************************************************
 159  get the default domain/netbios name to be used when dealing
 160  with our passdb list of accounts
 161 ******************************************************************/
 162
 163 const char *get_global_sam_name(void)
 164 {
 165         if (IS_DC) {
 166                 return lp_workgroup();
 167         }
 168         return lp_netbios_name();
 169 }
 170
 171
 172 /******************************************************************
 173  Get the default domain/netbios name to be used when
 174  testing authentication.
 175 ******************************************************************/
 176
 177 const char *my_sam_name(void)
 178 {
 179         if (lp_server_role() == ROLE_STANDALONE) {
 180                 return lp_netbios_name();
 181         }
 182
 183         return lp_workgroup();
 184 }
 185
 186 bool is_allowed_domain(const char *domain_name)
 187 {
 188         const char **ignored_domains = NULL;
 189         const char **dom = NULL;
 190
 191         ignored_domains = lp_parm_string_list(-1,
 192                                               "winbind",
 193                                               "ignore domains",
 194                                               NULL);
 195
 196         for (dom = ignored_domains; dom != NULL && *dom != NULL; dom++) {
 197                 if (gen_fnmatch(*dom, domain_name) == 0) {
 198                         DBG_NOTICE("Ignoring domain '%s'\n", domain_name);
 199                         return false;
 200                 }
 201         }
 202
 203         if (lp_allow_trusted_domains()) {
 204                 return true;
 205         }
 206
 207         if (strequal(lp_workgroup(), domain_name)) {
 208                 return true;
 209         }
 210
 211         if (is_myname(domain_name)) {
 212                 return true;
 213         }
 214
 215         DBG_NOTICE("Not trusted domain '%s'\n", domain_name);
 216         return false;
 217 }