dlls/kernel/computername.c

   1 /*
   2  * Win32 kernel functions
   3  *
   4  * Copyright 1995 Martin von Loewis and Cameron Heide
   5  * Copyright 1999 Peter Ganten
   6  * Copyright 2002 Martin Wilck
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <stdarg.h>
  27 #include <string.h>
  28 #ifdef HAVE_UNISTD_H
  29 # include <unistd.h>
  30 #endif
  31 #include <stdlib.h>
  32 #include <errno.h>
  33 #ifdef HAVE_NETDB_H
  34 #include <netdb.h>
  35 #endif
  36
  37 #include "ntstatus.h"
  38 #define WIN32_NO_STATUS
  39 #include "windef.h"
  40 #include "winbase.h"
  41 #include "winerror.h"
  42 #include "winnls.h"
  43 #include "winternl.h"
  44 #include "wine/unicode.h"
  45 #include "wine/exception.h"
  46 #include "excpt.h"
  47 #include "wine/debug.h"
  48
  49 #include "kernel_private.h"
  50
  51 WINE_DEFAULT_DEBUG_CHANNEL(computername);
  52
  53 /* Registry key and value names */
  54 static const WCHAR ComputerW[] = {'M','a','c','h','i','n','e','\\',
  55                                   'S','y','s','t','e','m','\\',
  56                                   'C','u','r','r','e','n','t','C','o','n','t','r','o','l','S','e','t','\\',
  57                                   'C','o','n','t','r','o','l','\\',
  58                                   'C','o','m','p','u','t','e','r','N','a','m','e',0};
  59 static const WCHAR ActiveComputerNameW[] =   {'A','c','t','i','v','e','C','o','m','p','u','t','e','r','N','a','m','e',0};
  60 static const WCHAR ComputerNameW[] = {'C','o','m','p','u','t','e','r','N','a','m','e',0};
  61
  62 static const char default_ComputerName[] = "WINE";
  63
  64 #define IS_OPTION_TRUE(ch) ((ch) == 'y' || (ch) == 'Y' || (ch) == 't' || (ch) == 'T' || (ch) == '1')
  65
  66 /***********************************************************************
  67  *                    dns_gethostbyname (INTERNAL)
  68  *
  69  *  From hostname(1):
  70  *  "The FQDN is the name gethostbyname(2) returns for the host name returned by gethostname(2)."
  71  *
  72  *  Wine can use this technique only if the thread-safe gethostbyname_r is available.
  73  */
  74 #ifdef  HAVE_LINUX_GETHOSTBYNAME_R_6
  75 static BOOL dns_gethostbyname ( char *name, int *size )
  76 {
  77     struct hostent* host = NULL;
  78     char *extrabuf;
  79     int ebufsize = 1024;
  80     struct hostent hostentry;
  81     int locerr = ENOBUFS, res = ENOMEM;
  82
  83     extrabuf = HeapAlloc( GetProcessHeap(), 0, ebufsize ) ;
  84
  85     while( extrabuf )
  86     {
  87         res = gethostbyname_r ( name, &hostentry, extrabuf, ebufsize, &host, &locerr );
  88         if( res != ERANGE ) break;
  89         ebufsize *= 2;
  90         extrabuf = HeapReAlloc( GetProcessHeap(), 0, extrabuf, ebufsize ) ;
  91     }
  92
  93     if ( res )
  94         WARN ("Error in gethostbyname_r %d (%d)\n", res, locerr);
  95     else
  96     {
  97         int len = strlen ( host->h_name );
  98         if ( len < *size )
  99         {
 100             strcpy ( name, host->h_name );
 101             *size = len;
 102         }
 103         else
 104         {
 105             memcpy ( name, host->h_name, *size );
 106             name[*size] = 0;
 107             SetLastError ( ERROR_MORE_DATA );
 108             res = 1;
 109         }
 110     }
 111
 112     HeapFree( GetProcessHeap(), 0, extrabuf );
 113     return !res;
 114 }
 115 #else
 116 #  define dns_gethostbyname(name,size) 0
 117 #endif
 118
 119 /***********************************************************************
 120  *                     dns_fqdn (INTERNAL)
 121  */
 122 static BOOL dns_fqdn ( char *name, int *size )
 123 {
 124     if ( gethostname ( name, *size + 1 ) )
 125     {
 126         switch( errno )
 127         {
 128         case ENAMETOOLONG:
 129             SetLastError ( ERROR_MORE_DATA );
 130         default:
 131             SetLastError ( ERROR_INVALID_PARAMETER );
 132         }
 133         return FALSE;
 134     }
 135
 136     if ( !dns_gethostbyname ( name, size ) )
 137         *size = strlen ( name );
 138
 139     return TRUE;
 140 }
 141
 142 /***********************************************************************
 143  *                     dns_hostname (INTERNAL)
 144  */
 145 static BOOL dns_hostname ( char *name, int *size )
 146 {
 147     char *c;
 148     if ( ! dns_fqdn ( name, size ) ) return FALSE;
 149     c = strchr ( name, '.' );
 150     if (c)
 151     {
 152         *c = 0;
 153         *size = (c - name);
 154     }
 155     return TRUE;
 156 }
 157
 158 /***********************************************************************
 159  *                     dns_domainname (INTERNAL)
 160  */
 161 static BOOL dns_domainname ( char *name, int *size )
 162 {
 163     char *c;
 164     if ( ! dns_fqdn ( name, size ) ) return FALSE;
 165     c = strchr ( name, '.' );
 166     if (c)
 167     {
 168         c += 1;
 169         *size -= (c - name);
 170         memmove ( name, c, *size + 1 );
 171     }
 172     return TRUE;
 173 }
 174
 175 /***********************************************************************
 176  *                      _init_attr    (INTERNAL)
 177  */
 178 inline static void _init_attr ( OBJECT_ATTRIBUTES *attr, UNICODE_STRING *name )
 179 {
 180     attr->Length = sizeof (OBJECT_ATTRIBUTES);
 181     attr->RootDirectory = 0;
 182     attr->ObjectName = name;
 183     attr->Attributes = 0;
 184     attr->SecurityDescriptor = NULL;
 185     attr->SecurityQualityOfService = NULL;
 186 }
 187
 188 /***********************************************************************
 189  *           get_use_dns_option
 190  */
 191 static BOOL get_use_dns_option(void)
 192 {
 193     static const WCHAR NetworkW[] = {'S','o','f','t','w','a','r','e','\\',
 194                                      'W','i','n','e','\\','N','e','t','w','o','r','k',0};
 195     static const WCHAR UseDNSW[] = {'U','s','e','D','n','s','C','o','m','p','u','t','e','r','N','a','m','e',0};
 196
 197     char tmp[80];
 198     HANDLE root, hkey;
 199     DWORD dummy;
 200     OBJECT_ATTRIBUTES attr;
 201     UNICODE_STRING nameW;
 202     BOOL ret = TRUE;
 203
 204     _init_attr( &attr, &nameW );
 205     RtlOpenCurrentUser( KEY_ALL_ACCESS, &root );
 206     attr.RootDirectory = root;
 207     RtlInitUnicodeString( &nameW, NetworkW );
 208
 209     /* @@ Wine registry key: HKCU\Software\Wine\Network */
 210     if (!NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ))
 211     {
 212         RtlInitUnicodeString( &nameW, UseDNSW );
 213         if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, tmp, sizeof(tmp), &dummy ))
 214         {
 215             WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)tmp)->Data;
 216             ret = IS_OPTION_TRUE( str[0] );
 217         }
 218         NtClose( hkey );
 219     }
 220     NtClose( root );
 221     return ret;
 222 }
 223
 224
 225 /***********************************************************************
 226  *                      COMPUTERNAME_Init    (INTERNAL)
 227  */
 228 void COMPUTERNAME_Init (void)
 229 {
 230     HANDLE hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
 231     OBJECT_ATTRIBUTES attr;
 232     UNICODE_STRING nameW;
 233     char buf[offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ) + (MAX_COMPUTERNAME_LENGTH + 1) * sizeof( WCHAR )];
 234     DWORD len = sizeof( buf );
 235     LPWSTR computer_name = (LPWSTR) (buf + offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
 236     NTSTATUS st = STATUS_INTERNAL_ERROR;
 237
 238     TRACE("(void)\n");
 239     _init_attr ( &attr, &nameW );
 240
 241     RtlInitUnicodeString( &nameW, ComputerW );
 242     if ( ( st = NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ) ) != STATUS_SUCCESS )
 243         goto out;
 244
 245     attr.RootDirectory = hkey;
 246     RtlInitUnicodeString( &nameW, ComputerNameW );
 247     if ( (st = NtCreateKey( &hsubkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ) ) != STATUS_SUCCESS )
 248         goto out;
 249
 250     st = NtQueryValueKey( hsubkey, &nameW, KeyValuePartialInformation, buf, len, &len );
 251
 252     if ( st != STATUS_SUCCESS || get_use_dns_option() )
 253     {
 254         char hbuf[256];
 255         int hlen = sizeof (hbuf);
 256         char *dot;
 257         TRACE( "retrieving Unix host name\n" );
 258         if ( gethostname ( hbuf, hlen ) )
 259         {
 260             strcpy ( hbuf, default_ComputerName );
 261             WARN( "gethostname() error: %d, using host name %s\n", errno, hbuf );
 262         }
 263         hbuf[MAX_COMPUTERNAME_LENGTH] = 0;
 264         dot = strchr ( hbuf, '.' );
 265         if ( dot ) *dot = 0;
 266         hlen = strlen ( hbuf );
 267         len = MultiByteToWideChar( CP_ACP, 0, hbuf, hlen + 1, computer_name, MAX_COMPUTERNAME_LENGTH + 1 )
 268             * sizeof( WCHAR );
 269         if ( NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, computer_name, len ) != STATUS_SUCCESS )
 270             WARN ( "failed to set ComputerName\n" );
 271     }
 272     else if ( st == STATUS_SUCCESS)
 273     {
 274         len = (len - offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
 275         TRACE( "found in registry\n" );
 276     }
 277     else goto out;
 278
 279     NtClose( hsubkey );
 280     TRACE(" ComputerName: %s (%lu)\n", debugstr_w ( computer_name ), len / sizeof(WCHAR));
 281
 282     RtlInitUnicodeString( &nameW, ActiveComputerNameW );
 283     if ( ( st = NtCreateKey( &hsubkey, KEY_ALL_ACCESS, &attr, 0, NULL, REG_OPTION_VOLATILE, NULL ) )
 284          != STATUS_SUCCESS )
 285         goto out;
 286
 287     RtlInitUnicodeString( &nameW, ComputerNameW );
 288     st = NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, computer_name, len );
 289
 290 out:
 291     NtClose( hsubkey );
 292     NtClose( hkey );
 293
 294     if ( st == STATUS_SUCCESS )
 295         TRACE( "success\n" );
 296     else
 297     {
 298         WARN( "status trying to set ComputerName: %lx\n", st );
 299         SetLastError ( RtlNtStatusToDosError ( st ) );
 300     }
 301 }
 302
 303
 304 /***********************************************************************
 305  *              GetComputerNameW         (KERNEL32.@)
 306  */
 307 BOOL WINAPI GetComputerNameW(LPWSTR name,LPDWORD size)
 308 {
 309     UNICODE_STRING nameW;
 310     OBJECT_ATTRIBUTES attr;
 311     HANDLE hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
 312     char buf[offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ) + (MAX_COMPUTERNAME_LENGTH + 1) * sizeof( WCHAR )];
 313     DWORD len = sizeof( buf );
 314     LPWSTR theName = (LPWSTR) (buf + offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
 315     NTSTATUS st = STATUS_INVALID_PARAMETER;
 316
 317     TRACE ("%p %p\n", name, size);
 318
 319     _init_attr ( &attr, &nameW );
 320     RtlInitUnicodeString( &nameW, ComputerW );
 321     if ( ( st = NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
 322         goto out;
 323
 324     attr.RootDirectory = hkey;
 325     RtlInitUnicodeString( &nameW, ActiveComputerNameW );
 326     if ( ( st = NtOpenKey( &hsubkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
 327         goto out;
 328
 329     RtlInitUnicodeString( &nameW, ComputerNameW );
 330     if ( ( st = NtQueryValueKey( hsubkey, &nameW, KeyValuePartialInformation, buf, len, &len ) )
 331          != STATUS_SUCCESS )
 332         goto out;
 333
 334     len = (len -offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data )) / sizeof (WCHAR) - 1;
 335     TRACE ("ComputerName is %s (length %lu)\n", debugstr_w ( theName ), len);
 336
 337     __TRY
 338     {
 339         if ( *size < len )
 340         {
 341             memcpy ( name, theName, *size * sizeof (WCHAR) );
 342             name[*size] = 0;
 343             *size = len;
 344             st = STATUS_MORE_ENTRIES;
 345         }
 346         else
 347         {
 348             memcpy ( name, theName, len * sizeof (WCHAR) );
 349             name[len] = 0;
 350             *size = len;
 351             st = STATUS_SUCCESS;
 352         }
 353     }
 354     __EXCEPT_PAGE_FAULT
 355     {
 356         st = STATUS_INVALID_PARAMETER;
 357     }
 358     __ENDTRY
 359
 360 out:
 361     NtClose ( hsubkey );
 362     NtClose ( hkey );
 363
 364     if ( st == STATUS_SUCCESS )
 365         return TRUE;
 366     else
 367     {
 368         SetLastError ( RtlNtStatusToDosError ( st ) );
 369         WARN ( "Status %lu reading computer name from registry\n", st );
 370         return FALSE;
 371     }
 372 }
 373
 374 /***********************************************************************
 375  *              GetComputerNameA         (KERNEL32.@)
 376  */
 377 BOOL WINAPI GetComputerNameA(LPSTR name, LPDWORD size)
 378 {
 379     WCHAR nameW[ MAX_COMPUTERNAME_LENGTH + 1 ];
 380     DWORD sizeW = MAX_COMPUTERNAME_LENGTH;
 381     unsigned int len;
 382     BOOL ret;
 383
 384     if ( !GetComputerNameW (nameW, &sizeW) ) return FALSE;
 385
 386     len = WideCharToMultiByte ( CP_ACP, 0, nameW, sizeW, NULL, 0, NULL, 0 );
 387     __TRY
 388     {
 389         if ( *size < len )
 390         {
 391             WideCharToMultiByte ( CP_ACP, 0, nameW, sizeW, name, *size, NULL, 0 );
 392             name[*size] = 0;
 393             *size = len;
 394             SetLastError( ERROR_MORE_DATA );
 395             ret = FALSE;
 396         }
 397         else
 398         {
 399             WideCharToMultiByte ( CP_ACP, 0, nameW, sizeW, name, len, NULL, 0 );
 400             name[len] = 0;
 401             *size = len;
 402             ret = TRUE;
 403         }
 404     }
 405     __EXCEPT_PAGE_FAULT
 406     {
 407         SetLastError( ERROR_INVALID_PARAMETER );
 408         ret = FALSE;
 409     }
 410     __ENDTRY
 411
 412     return ret;
 413 }
 414
 415 /***********************************************************************
 416  *              GetComputerNameExA         (KERNEL32.@)
 417  */
 418 BOOL WINAPI GetComputerNameExA(COMPUTER_NAME_FORMAT type, LPSTR name, LPDWORD size)
 419 {
 420     char buf[256];
 421     int len = sizeof (buf), ret;
 422     TRACE("%d, %p, %p\n", type, name, size);
 423     switch( type )
 424     {
 425     case ComputerNameNetBIOS:
 426     case ComputerNamePhysicalNetBIOS:
 427         return GetComputerNameA (name, size);
 428     case ComputerNameDnsHostname:
 429     case ComputerNamePhysicalDnsHostname:
 430         ret = dns_hostname (buf, &len);
 431         break;
 432     case ComputerNameDnsDomain:
 433     case ComputerNamePhysicalDnsDomain:
 434         ret = dns_domainname (buf, &len);
 435         break;
 436     case ComputerNameDnsFullyQualified:
 437     case ComputerNamePhysicalDnsFullyQualified:
 438         ret = dns_fqdn (buf, &len);
 439         break;
 440     default:
 441         SetLastError (ERROR_INVALID_PARAMETER);
 442         return FALSE;
 443     }
 444
 445     if ( ret )
 446     {
 447         TRACE ("-> %s (%d)\n", debugstr_a (buf), len);
 448         __TRY
 449         {
 450             if ( *size < len )
 451             {
 452                 memcpy( name, buf, *size );
 453                 name[*size] = 0;
 454                 *size = len;
 455                 SetLastError( ERROR_MORE_DATA );
 456                 ret = FALSE;
 457             }
 458             else
 459             {
 460                 memcpy( name, buf, len );
 461                 name[len] = 0;
 462                 *size = len;
 463                 ret = TRUE;
 464             }
 465         }
 466         __EXCEPT_PAGE_FAULT
 467         {
 468             SetLastError( ERROR_INVALID_PARAMETER );
 469             return FALSE;
 470         }
 471         __ENDTRY
 472     }
 473
 474     return ret;
 475 }
 476
 477
 478 /***********************************************************************
 479  *              GetComputerNameExW         (KERNEL32.@)
 480  */
 481 BOOL WINAPI GetComputerNameExW( COMPUTER_NAME_FORMAT type, LPWSTR name, LPDWORD size )
 482 {
 483     char buf[256];
 484     int len = sizeof (buf), ret;
 485
 486     TRACE("%d, %p, %p\n", type, name, size);
 487     switch( type )
 488     {
 489     case ComputerNameNetBIOS:
 490     case ComputerNamePhysicalNetBIOS:
 491         return GetComputerNameW (name, size);
 492     case ComputerNameDnsHostname:
 493     case ComputerNamePhysicalDnsHostname:
 494         ret = dns_hostname (buf, &len);
 495         break;
 496     case ComputerNameDnsDomain:
 497     case ComputerNamePhysicalDnsDomain:
 498         ret = dns_domainname (buf, &len);
 499         break;
 500     case ComputerNameDnsFullyQualified:
 501     case ComputerNamePhysicalDnsFullyQualified:
 502         ret = dns_fqdn (buf, &len);
 503         break;
 504     default:
 505         SetLastError (ERROR_INVALID_PARAMETER);
 506         return FALSE;
 507     }
 508
 509     if ( ret )
 510     {
 511         TRACE ("-> %s (%d)\n", debugstr_a (buf), len);
 512         __TRY
 513         {
 514             unsigned int lenW = MultiByteToWideChar( CP_ACP, 0, buf, len, NULL, 0 );
 515             if ( *size < lenW )
 516             {
 517                 MultiByteToWideChar( CP_ACP, 0, buf, len, name, *size );
 518                 name[*size] = 0;
 519                 *size = lenW;
 520                 SetLastError( ERROR_MORE_DATA );
 521                 ret = FALSE;
 522             }
 523             else
 524             {
 525                 MultiByteToWideChar( CP_ACP, 0, buf, len, name, lenW );
 526                 name[lenW] = 0;
 527                 *size = lenW;
 528                 ret = TRUE;
 529             }
 530         }
 531         __EXCEPT_PAGE_FAULT
 532         {
 533             SetLastError( ERROR_INVALID_PARAMETER );
 534             return FALSE;
 535         }
 536         __ENDTRY
 537     }
 538
 539     return ret;
 540 }
 541
 542 /******************************************************************************
 543  * netbios_char (INTERNAL)
 544  */
 545 static WCHAR netbios_char ( WCHAR wc )
 546 {
 547     static const WCHAR special[] = {'!','@','#','$','%','^','&','\'',')','(','-','_','{','}','~'};
 548     static const WCHAR deflt = '_';
 549     unsigned int i;
 550
 551     if ( isalnumW ( wc ) ) return wc;
 552     for ( i = 0; i < sizeof (special) / sizeof (WCHAR); i++ )
 553         if ( wc == special[i] ) return wc;
 554     return deflt;
 555 }
 556
 557 /******************************************************************************
 558  * SetComputerNameW [KERNEL32.@]
 559  *
 560  * Set a new NetBIOS name for the local computer.
 561  *
 562  * PARAMS
 563  *    lpComputerName [I] Address of new computer name
 564  *
 565  * RETURNS
 566  *    Success: TRUE
 567  *    Failure: FALSE
 568  */
 569 BOOL WINAPI SetComputerNameW( LPCWSTR lpComputerName )
 570 {
 571     UNICODE_STRING nameW;
 572     OBJECT_ATTRIBUTES attr;
 573     HANDLE hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
 574     int plen = strlenW ( lpComputerName );
 575     int i;
 576     NTSTATUS st = STATUS_INTERNAL_ERROR;
 577
 578     if (get_use_dns_option())
 579     {
 580         /* This check isn't necessary, but may help debugging problems. */
 581         WARN( "Disabled by Wine Configuration.\n" );
 582         WARN( "Set \"UseDnsComputerName\" = \"N\" in category [Network] to enable.\n" );
 583         SetLastError ( ERROR_ACCESS_DENIED );
 584         return FALSE;
 585     }
 586
 587     TRACE( "%s\n", debugstr_w (lpComputerName) );
 588
 589     /* Check parameter */
 590     if ( plen > MAX_COMPUTERNAME_LENGTH )
 591         goto out;
 592
 593     /* This is NT behaviour. Win 95/98 would coerce characters. */
 594     for ( i = 0; i < plen; i++ )
 595     {
 596         WCHAR wc = lpComputerName[i];
 597         if ( wc != netbios_char( wc ) )
 598             goto out;
 599     }
 600
 601     _init_attr ( &attr, &nameW );
 602
 603     RtlInitUnicodeString (&nameW, ComputerW);
 604     if ( ( st = NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
 605         goto out;
 606     attr.RootDirectory = hkey;
 607     RtlInitUnicodeString( &nameW, ComputerNameW );
 608     if ( ( st = NtOpenKey( &hsubkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
 609         goto out;
 610     if ( ( st = NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, lpComputerName, ( plen + 1) * sizeof(WCHAR) ) )
 611          != STATUS_SUCCESS )
 612         goto out;
 613
 614 out:
 615     NtClose( hsubkey );
 616     NtClose( hkey );
 617
 618     if ( st == STATUS_SUCCESS )
 619     {
 620         TRACE( "ComputerName changed\n" );
 621         return TRUE;
 622     }
 623
 624     else
 625     {
 626         SetLastError ( RtlNtStatusToDosError ( st ) );
 627         WARN ( "status %lu\n", st );
 628         return FALSE;
 629     }
 630 }
 631
 632 /******************************************************************************
 633  * SetComputerNameA [KERNEL32.@]
 634  *
 635  * See SetComputerNameW.
 636  */
 637 BOOL WINAPI SetComputerNameA( LPCSTR lpComputerName )
 638 {
 639     BOOL ret;
 640     DWORD len = MultiByteToWideChar( CP_ACP, 0, lpComputerName, -1, NULL, 0 );
 641     LPWSTR nameW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
 642
 643     MultiByteToWideChar( CP_ACP, 0, lpComputerName, -1, nameW, len );
 644     ret = SetComputerNameW( nameW );
 645     HeapFree( GetProcessHeap(), 0, nameW );
 646     return ret;
 647 }
 648
 649 /******************************************************************************
 650  * SetComputerNameExW [KERNEL32.@]
 651  *
 652  */
 653 BOOL WINAPI SetComputerNameExW( COMPUTER_NAME_FORMAT type, LPCWSTR lpComputerName )
 654 {
 655     TRACE("%d, %s\n", type, debugstr_w (lpComputerName));
 656     switch( type )
 657     {
 658     case ComputerNameNetBIOS:
 659     case ComputerNamePhysicalNetBIOS:
 660         return SetComputerNameW( lpComputerName );
 661     default:
 662         SetLastError( ERROR_ACCESS_DENIED );
 663         return FALSE;
 664     }
 665 }
 666
 667 /******************************************************************************
 668  * SetComputerNameExA [KERNEL32.@]
 669  *
 670  */
 671 BOOL WINAPI SetComputerNameExA( COMPUTER_NAME_FORMAT type, LPCSTR lpComputerName )
 672 {
 673     TRACE( "%d, %s\n", type, debugstr_a (lpComputerName) );
 674     switch( type )
 675     {
 676     case ComputerNameNetBIOS:
 677     case ComputerNamePhysicalNetBIOS:
 678         return SetComputerNameA( lpComputerName );
 679     default:
 680         SetLastError( ERROR_ACCESS_DENIED );
 681         return FALSE;
 682     }
 683 }
 684
 685 /***********************************************************************
 686  *              DnsHostnameToComputerNameA         (KERNEL32.@)
 687  */
 688 BOOL WINAPI DnsHostnameToComputerNameA(LPCSTR hostname,
 689     LPSTR computername, LPDWORD size)
 690 {
 691     DWORD len;
 692
 693     FIXME("(%s, %p, %p): stub\n", debugstr_a(hostname), computername, size);
 694
 695     if (!hostname || !size) return FALSE;
 696     len = lstrlenA(hostname);
 697
 698     if (len > MAX_COMPUTERNAME_LENGTH)
 699         len = MAX_COMPUTERNAME_LENGTH;
 700
 701     if (*size < len)
 702     {
 703         *size = len;
 704         return FALSE;
 705     }
 706     if (!computername) return FALSE;
 707
 708     memcpy( computername, hostname, len );
 709     computername[len + 1] = 0;
 710     return TRUE;
 711 }
 712
 713 /***********************************************************************
 714  *              DnsHostnameToComputerNameW         (KERNEL32.@)
 715  */
 716 BOOL WINAPI DnsHostnameToComputerNameW(LPCWSTR hostname,
 717     LPWSTR computername, LPDWORD size)
 718 {
 719     DWORD len;
 720
 721     FIXME("(%s, %p, %p): stub\n", debugstr_w(hostname), computername, size);
 722
 723     if (!hostname || !size) return FALSE;
 724     len = lstrlenW(hostname);
 725
 726     if (len > MAX_COMPUTERNAME_LENGTH)
 727         len = MAX_COMPUTERNAME_LENGTH;
 728
 729     if (*size < len)
 730     {
 731         *size = len;
 732         return FALSE;
 733     }
 734     if (!computername) return FALSE;
 735
 736     memcpy( computername, hostname, len * sizeof(WCHAR) );
 737     computername[len + 1] = 0;
 738     return TRUE;
 739 }