dlls/kernel32/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 "wine/debug.h"
  47
  48 #include "kernel_private.h"
  49
  50 WINE_DEFAULT_DEBUG_CHANNEL(computername);
  51
  52 /* Registry key and value names */
  53 static const WCHAR ComputerW[] = {'M','a','c','h','i','n','e','\\',
  54                                   'S','y','s','t','e','m','\\',
  55                                   'C','u','r','r','e','n','t','C','o','n','t','r','o','l','S','e','t','\\',
  56                                   'C','o','n','t','r','o','l','\\',
  57                                   'C','o','m','p','u','t','e','r','N','a','m','e',0};
  58 static const WCHAR ActiveComputerNameW[] =   {'A','c','t','i','v','e','C','o','m','p','u','t','e','r','N','a','m','e',0};
  59 static const WCHAR ComputerNameW[] = {'C','o','m','p','u','t','e','r','N','a','m','e',0};
  60
  61 static const char default_ComputerName[] = "WINE";
  62
  63 #define IS_OPTION_TRUE(ch) ((ch) == 'y' || (ch) == 'Y' || (ch) == 't' || (ch) == 'T' || (ch) == '1')
  64
  65 /***********************************************************************
  66  *                    dns_gethostbyname (INTERNAL)
  67  *
  68  *  From hostname(1):
  69  *  "The FQDN is the name gethostbyname(2) returns for the host name returned by gethostname(2)."
  70  *
  71  *  Wine can use this technique only if the thread-safe gethostbyname_r is available.
  72  */
  73 #ifdef  HAVE_LINUX_GETHOSTBYNAME_R_6
  74 static BOOL dns_gethostbyname ( char *name, int *size )
  75 {
  76     struct hostent* host = NULL;
  77     char *extrabuf;
  78     int ebufsize = 1024;
  79     struct hostent hostentry;
  80     int locerr = ENOBUFS, res = ENOMEM;
  81
  82     extrabuf = HeapAlloc( GetProcessHeap(), 0, ebufsize ) ;
  83
  84     while( extrabuf )
  85     {
  86         res = gethostbyname_r ( name, &hostentry, extrabuf, ebufsize, &host, &locerr );
  87         if( res != ERANGE ) break;
  88         ebufsize *= 2;
  89         extrabuf = HeapReAlloc( GetProcessHeap(), 0, extrabuf, ebufsize ) ;
  90     }
  91
  92     if ( res )
  93         WARN ("Error in gethostbyname_r %d (%d)\n", res, locerr);
  94     else if ( !host )
  95     {
  96         WARN ("gethostbyname_r returned NULL host, locerr = %d\n", locerr);
  97         res = 1;
  98     }
  99     else
 100     {
 101         int len = strlen ( host->h_name );
 102         if ( len < *size )
 103         {
 104             strcpy ( name, host->h_name );
 105             *size = len;
 106         }
 107         else
 108         {
 109             memcpy ( name, host->h_name, *size );
 110             name[*size] = 0;
 111             SetLastError ( ERROR_MORE_DATA );
 112             res = 1;
 113         }
 114     }
 115
 116     HeapFree( GetProcessHeap(), 0, extrabuf );
 117     return !res;
 118 }
 119 #else
 120 #  define dns_gethostbyname(name,size) 0
 121 #endif
 122
 123 /***********************************************************************
 124  *                     dns_fqdn (INTERNAL)
 125  */
 126 static BOOL dns_fqdn ( char *name, int *size )
 127 {
 128     if ( gethostname ( name, *size + 1 ) )
 129     {
 130         switch( errno )
 131         {
 132         case ENAMETOOLONG:
 133             SetLastError ( ERROR_MORE_DATA );
 134             break;
 135         default:
 136             SetLastError ( ERROR_INVALID_PARAMETER );
 137             break;
 138         }
 139         return FALSE;
 140     }
 141
 142     if ( !dns_gethostbyname ( name, size ) )
 143         *size = strlen ( name );
 144
 145     return TRUE;
 146 }
 147
 148 /***********************************************************************
 149  *                     dns_hostname (INTERNAL)
 150  */
 151 static BOOL dns_hostname ( char *name, int *size )
 152 {
 153     char *c;
 154     if ( ! dns_fqdn ( name, size ) ) return FALSE;
 155     c = strchr ( name, '.' );
 156     if (c)
 157     {
 158         *c = 0;
 159         *size = (c - name);
 160     }
 161     return TRUE;
 162 }
 163
 164 /***********************************************************************
 165  *                     dns_domainname (INTERNAL)
 166  */
 167 static BOOL dns_domainname ( char *name, int *size )
 168 {
 169     char *c;
 170     if ( ! dns_fqdn ( name, size ) ) return FALSE;
 171     c = strchr ( name, '.' );
 172     if (c)
 173     {
 174         c += 1;
 175         *size -= (c - name);
 176         memmove ( name, c, *size + 1 );
 177     }
 178     return TRUE;
 179 }
 180
 181 /***********************************************************************
 182  *                      _init_attr    (INTERNAL)
 183  */
 184 static inline void _init_attr ( OBJECT_ATTRIBUTES *attr, UNICODE_STRING *name )
 185 {
 186     attr->Length = sizeof (OBJECT_ATTRIBUTES);
 187     attr->RootDirectory = 0;
 188     attr->ObjectName = name;
 189     attr->Attributes = 0;
 190     attr->SecurityDescriptor = NULL;
 191     attr->SecurityQualityOfService = NULL;
 192 }
 193
 194 /***********************************************************************
 195  *           get_use_dns_option
 196  */
 197 static BOOL get_use_dns_option(void)
 198 {
 199     static const WCHAR NetworkW[] = {'S','o','f','t','w','a','r','e','\\',
 200                                      'W','i','n','e','\\','N','e','t','w','o','r','k',0};
 201     static const WCHAR UseDNSW[] = {'U','s','e','D','n','s','C','o','m','p','u','t','e','r','N','a','m','e',0};
 202
 203     char tmp[80];
 204     HANDLE root, hkey;
 205     DWORD dummy;
 206     OBJECT_ATTRIBUTES attr;
 207     UNICODE_STRING nameW;
 208     BOOL ret = TRUE;
 209
 210     _init_attr( &attr, &nameW );
 211     RtlOpenCurrentUser( KEY_READ, &root );
 212     attr.RootDirectory = root;
 213     RtlInitUnicodeString( &nameW, NetworkW );
 214
 215     /* @@ Wine registry key: HKCU\Software\Wine\Network */
 216     if (!NtOpenKey( &hkey, KEY_READ, &attr ))
 217     {
 218         RtlInitUnicodeString( &nameW, UseDNSW );
 219         if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, tmp, sizeof(tmp), &dummy ))
 220         {
 221             WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)tmp)->Data;
 222             ret = IS_OPTION_TRUE( str[0] );
 223         }
 224         NtClose( hkey );
 225     }
 226     NtClose( root );
 227     return ret;
 228 }
 229
 230
 231 /***********************************************************************
 232  *                      COMPUTERNAME_Init    (INTERNAL)
 233  */
 234 void COMPUTERNAME_Init (void)
 235 {
 236     HANDLE hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
 237     OBJECT_ATTRIBUTES attr;
 238     UNICODE_STRING nameW;
 239     char buf[offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ) + (MAX_COMPUTERNAME_LENGTH + 1) * sizeof( WCHAR )];
 240     DWORD len = sizeof( buf );
 241     LPWSTR computer_name = (LPWSTR) (buf + offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
 242     NTSTATUS st = STATUS_INTERNAL_ERROR;
 243
 244     TRACE("(void)\n");
 245     _init_attr ( &attr, &nameW );
 246
 247     RtlInitUnicodeString( &nameW, ComputerW );
 248     if ( ( st = NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ) ) != STATUS_SUCCESS )
 249         goto out;
 250
 251     attr.RootDirectory = hkey;
 252     RtlInitUnicodeString( &nameW, ComputerNameW );
 253     if ( (st = NtCreateKey( &hsubkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ) ) != STATUS_SUCCESS )
 254         goto out;
 255
 256     st = NtQueryValueKey( hsubkey, &nameW, KeyValuePartialInformation, buf, len, &len );
 257
 258     if ( st != STATUS_SUCCESS || get_use_dns_option() )
 259     {
 260         char hbuf[256];
 261         int hlen = sizeof (hbuf);
 262         char *dot;
 263         TRACE( "retrieving Unix host name\n" );
 264         if ( gethostname ( hbuf, hlen ) )
 265         {
 266             strcpy ( hbuf, default_ComputerName );
 267             WARN( "gethostname() error: %d, using host name %s\n", errno, hbuf );
 268         }
 269         hbuf[MAX_COMPUTERNAME_LENGTH] = 0;
 270         dot = strchr ( hbuf, '.' );
 271         if ( dot ) *dot = 0;
 272         hlen = strlen ( hbuf );
 273         len = MultiByteToWideChar( CP_UNIXCP, 0, hbuf, hlen + 1, computer_name, MAX_COMPUTERNAME_LENGTH + 1 )
 274             * sizeof( WCHAR );
 275         if ( NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, computer_name, len ) != STATUS_SUCCESS )
 276             WARN ( "failed to set ComputerName\n" );
 277     }
 278     else
 279     {
 280         len = (len - offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
 281         TRACE( "found in registry\n" );
 282     }
 283
 284     NtClose( hsubkey );
 285     TRACE(" ComputerName: %s (%u)\n", debugstr_w (computer_name), len);
 286
 287     RtlInitUnicodeString( &nameW, ActiveComputerNameW );
 288     if ( ( st = NtCreateKey( &hsubkey, KEY_ALL_ACCESS, &attr, 0, NULL, REG_OPTION_VOLATILE, NULL ) )
 289          != STATUS_SUCCESS )
 290         goto out;
 291
 292     RtlInitUnicodeString( &nameW, ComputerNameW );
 293     st = NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, computer_name, len );
 294
 295 out:
 296     NtClose( hsubkey );
 297     NtClose( hkey );
 298
 299     if ( st == STATUS_SUCCESS )
 300         TRACE( "success\n" );
 301     else
 302     {
 303         WARN( "status trying to set ComputerName: %x\n", st );
 304         SetLastError ( RtlNtStatusToDosError ( st ) );
 305     }
 306 }
 307
 308
 309 /***********************************************************************
 310  *              GetComputerNameW         (KERNEL32.@)
 311  */
 312 BOOL WINAPI GetComputerNameW(LPWSTR name,LPDWORD size)
 313 {
 314     UNICODE_STRING nameW;
 315     OBJECT_ATTRIBUTES attr;
 316     HANDLE hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
 317     char buf[offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ) + (MAX_COMPUTERNAME_LENGTH + 1) * sizeof( WCHAR )];
 318     DWORD len = sizeof( buf );
 319     LPWSTR theName = (LPWSTR) (buf + offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
 320     NTSTATUS st = STATUS_INVALID_PARAMETER;
 321     DWORD err = ERROR_SUCCESS;
 322
 323     TRACE ("%p %p\n", name, size);
 324
 325     _init_attr ( &attr, &nameW );
 326     RtlInitUnicodeString( &nameW, ComputerW );
 327     if ( ( st = NtOpenKey( &hkey, KEY_READ, &attr ) ) != STATUS_SUCCESS )
 328     {
 329         err = RtlNtStatusToDosError ( st );
 330         goto out;
 331     }
 332
 333     attr.RootDirectory = hkey;
 334     RtlInitUnicodeString( &nameW, ActiveComputerNameW );
 335     if ( ( st = NtOpenKey( &hsubkey, KEY_READ, &attr ) ) != STATUS_SUCCESS )
 336     {
 337         err = RtlNtStatusToDosError ( st );
 338         goto out;
 339     }
 340
 341     RtlInitUnicodeString( &nameW, ComputerNameW );
 342     if ( ( st = NtQueryValueKey( hsubkey, &nameW, KeyValuePartialInformation, buf, len, &len ) )
 343          != STATUS_SUCCESS )
 344     {
 345         err = RtlNtStatusToDosError ( st );
 346         goto out;
 347     }
 348
 349     len = (len -offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data )) / sizeof (WCHAR) - 1;
 350     TRACE ("ComputerName is %s (length %u)\n", debugstr_w ( theName ), len);
 351
 352     if ( *size < len + 1 )
 353     {
 354         *size = len + 1;
 355         err = ERROR_BUFFER_OVERFLOW;
 356     }
 357     else
 358     {
 359         memcpy ( name, theName, len * sizeof (WCHAR) );
 360         name[len] = 0;
 361         *size = len;
 362     }
 363
 364 out:
 365     NtClose ( hsubkey );
 366     NtClose ( hkey );
 367
 368     if ( err == ERROR_SUCCESS )
 369         return TRUE;
 370     else
 371     {
 372         SetLastError ( err );
 373         WARN ( "Status %u reading computer name from registry\n", st );
 374         return FALSE;
 375     }
 376 }
 377
 378 /***********************************************************************
 379  *              GetComputerNameA         (KERNEL32.@)
 380  */
 381 BOOL WINAPI GetComputerNameA(LPSTR name, LPDWORD size)
 382 {
 383     WCHAR nameW[ MAX_COMPUTERNAME_LENGTH + 1 ];
 384     DWORD sizeW = MAX_COMPUTERNAME_LENGTH + 1;
 385     unsigned int len;
 386     BOOL ret;
 387
 388     if ( !GetComputerNameW (nameW, &sizeW) ) return FALSE;
 389
 390     len = WideCharToMultiByte ( CP_ACP, 0, nameW, -1, NULL, 0, NULL, 0 );
 391     /* for compatibility with Win9x */
 392     __TRY
 393     {
 394         if ( *size < len )
 395         {
 396             *size = len;
 397             SetLastError( ERROR_BUFFER_OVERFLOW );
 398             ret = FALSE;
 399         }
 400         else
 401         {
 402             WideCharToMultiByte ( CP_ACP, 0, nameW, -1, name, len, NULL, 0 );
 403             *size = len - 1;
 404             ret = TRUE;
 405         }
 406     }
 407     __EXCEPT_PAGE_FAULT
 408     {
 409         SetLastError( ERROR_INVALID_PARAMETER );
 410         ret = FALSE;
 411     }
 412     __ENDTRY
 413
 414     return ret;
 415 }
 416
 417 /***********************************************************************
 418  *              GetComputerNameExA         (KERNEL32.@)
 419  */
 420 BOOL WINAPI GetComputerNameExA(COMPUTER_NAME_FORMAT type, LPSTR name, LPDWORD size)
 421 {
 422     char buf[256];
 423     int len = sizeof(buf) - 1, ret;
 424     TRACE("%d, %p, %p\n", type, name, size);
 425     switch( type )
 426     {
 427     case ComputerNameNetBIOS:
 428     case ComputerNamePhysicalNetBIOS:
 429         ret = GetComputerNameA (name, size);
 430         if (!ret && GetLastError() == ERROR_BUFFER_OVERFLOW)
 431             SetLastError( ERROR_MORE_DATA );
 432         return ret;
 433
 434     case ComputerNameDnsHostname:
 435     case ComputerNamePhysicalDnsHostname:
 436         ret = dns_hostname (buf, &len);
 437         break;
 438     case ComputerNameDnsDomain:
 439     case ComputerNamePhysicalDnsDomain:
 440         ret = dns_domainname (buf, &len);
 441         break;
 442     case ComputerNameDnsFullyQualified:
 443     case ComputerNamePhysicalDnsFullyQualified:
 444         ret = dns_fqdn (buf, &len);
 445         break;
 446     default:
 447         SetLastError (ERROR_INVALID_PARAMETER);
 448         return FALSE;
 449     }
 450
 451     if ( ret )
 452     {
 453         TRACE ("-> %s (%d)\n", debugstr_a (buf), len);
 454         if ( *size < len + 1 )
 455         {
 456             *size = len + 1;
 457             SetLastError( ERROR_MORE_DATA );
 458             ret = FALSE;
 459         }
 460         else
 461         {
 462             memcpy( name, buf, len );
 463             name[len] = 0;
 464             *size = len;
 465             ret = TRUE;
 466         }
 467     }
 468
 469     return ret;
 470 }
 471
 472
 473 /***********************************************************************
 474  *              GetComputerNameExW         (KERNEL32.@)
 475  */
 476 BOOL WINAPI GetComputerNameExW( COMPUTER_NAME_FORMAT type, LPWSTR name, LPDWORD size )
 477 {
 478     char buf[256];
 479     int len = sizeof(buf) - 1, ret;
 480
 481     TRACE("%d, %p, %p\n", type, name, size);
 482     switch( type )
 483     {
 484     case ComputerNameNetBIOS:
 485     case ComputerNamePhysicalNetBIOS:
 486         ret = GetComputerNameW (name, size);
 487         if (!ret && GetLastError() == ERROR_BUFFER_OVERFLOW)
 488             SetLastError( ERROR_MORE_DATA );
 489         return ret;
 490     case ComputerNameDnsHostname:
 491     case ComputerNamePhysicalDnsHostname:
 492         ret = dns_hostname (buf, &len);
 493         break;
 494     case ComputerNameDnsDomain:
 495     case ComputerNamePhysicalDnsDomain:
 496         ret = dns_domainname (buf, &len);
 497         break;
 498     case ComputerNameDnsFullyQualified:
 499     case ComputerNamePhysicalDnsFullyQualified:
 500         ret = dns_fqdn (buf, &len);
 501         break;
 502     default:
 503         SetLastError (ERROR_INVALID_PARAMETER);
 504         return FALSE;
 505     }
 506
 507     if ( ret )
 508     {
 509         unsigned int lenW;
 510
 511         TRACE ("-> %s (%d)\n", debugstr_a (buf), len);
 512
 513         lenW = MultiByteToWideChar( CP_ACP, 0, buf, len, NULL, 0 );
 514         if ( *size < lenW + 1 )
 515         {
 516             *size = lenW + 1;
 517             SetLastError( ERROR_MORE_DATA );
 518             ret = FALSE;
 519         }
 520         else
 521         {
 522             MultiByteToWideChar( CP_ACP, 0, buf, len, name, lenW );
 523             name[lenW] = 0;
 524             *size = lenW;
 525             ret = TRUE;
 526         }
 527     }
 528
 529     return ret;
 530 }
 531
 532 /******************************************************************************
 533  * netbios_char (INTERNAL)
 534  */
 535 static WCHAR netbios_char ( WCHAR wc )
 536 {
 537     static const WCHAR special[] = {'!','@','#','$','%','^','&','\'',')','(','-','_','{','}','~'};
 538     static const WCHAR deflt = '_';
 539     unsigned int i;
 540
 541     if ( isalnumW ( wc ) ) return wc;
 542     for ( i = 0; i < sizeof (special) / sizeof (WCHAR); i++ )
 543         if ( wc == special[i] ) return wc;
 544     return deflt;
 545 }
 546
 547 /******************************************************************************
 548  * SetComputerNameW [KERNEL32.@]
 549  *
 550  * Set a new NetBIOS name for the local computer.
 551  *
 552  * PARAMS
 553  *    lpComputerName [I] Address of new computer name
 554  *
 555  * RETURNS
 556  *    Success: TRUE
 557  *    Failure: FALSE
 558  */
 559 BOOL WINAPI SetComputerNameW( LPCWSTR lpComputerName )
 560 {
 561     UNICODE_STRING nameW;
 562     OBJECT_ATTRIBUTES attr;
 563     HANDLE hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
 564     int plen = strlenW ( lpComputerName );
 565     int i;
 566     NTSTATUS st = STATUS_INTERNAL_ERROR;
 567
 568     if (get_use_dns_option())
 569     {
 570         /* This check isn't necessary, but may help debugging problems. */
 571         WARN( "Disabled by Wine Configuration.\n" );
 572         WARN( "Set \"UseDnsComputerName\" = \"N\" in HKCU\\Software\\Wine\\Network to enable.\n" );
 573         SetLastError ( ERROR_ACCESS_DENIED );
 574         return FALSE;
 575     }
 576
 577     TRACE( "%s\n", debugstr_w (lpComputerName) );
 578
 579     /* Check parameter */
 580     if ( plen > MAX_COMPUTERNAME_LENGTH )
 581         goto out;
 582
 583     /* This is NT behaviour. Win 95/98 would coerce characters. */
 584     for ( i = 0; i < plen; i++ )
 585     {
 586         WCHAR wc = lpComputerName[i];
 587         if ( wc != netbios_char( wc ) )
 588             goto out;
 589     }
 590
 591     _init_attr ( &attr, &nameW );
 592
 593     RtlInitUnicodeString (&nameW, ComputerW);
 594     if ( ( st = NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
 595         goto out;
 596     attr.RootDirectory = hkey;
 597     RtlInitUnicodeString( &nameW, ComputerNameW );
 598     if ( ( st = NtOpenKey( &hsubkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
 599         goto out;
 600     if ( ( st = NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, lpComputerName, ( plen + 1) * sizeof(WCHAR) ) )
 601          != STATUS_SUCCESS )
 602         goto out;
 603
 604 out:
 605     NtClose( hsubkey );
 606     NtClose( hkey );
 607
 608     if ( st == STATUS_SUCCESS )
 609     {
 610         TRACE( "ComputerName changed\n" );
 611         return TRUE;
 612     }
 613
 614     else
 615     {
 616         SetLastError ( RtlNtStatusToDosError ( st ) );
 617         WARN ( "status %u\n", st );
 618         return FALSE;
 619     }
 620 }
 621
 622 /******************************************************************************
 623  * SetComputerNameA [KERNEL32.@]
 624  *
 625  * See SetComputerNameW.
 626  */
 627 BOOL WINAPI SetComputerNameA( LPCSTR lpComputerName )
 628 {
 629     BOOL ret;
 630     DWORD len = MultiByteToWideChar( CP_ACP, 0, lpComputerName, -1, NULL, 0 );
 631     LPWSTR nameW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
 632
 633     MultiByteToWideChar( CP_ACP, 0, lpComputerName, -1, nameW, len );
 634     ret = SetComputerNameW( nameW );
 635     HeapFree( GetProcessHeap(), 0, nameW );
 636     return ret;
 637 }
 638
 639 /******************************************************************************
 640  * SetComputerNameExW [KERNEL32.@]
 641  *
 642  */
 643 BOOL WINAPI SetComputerNameExW( COMPUTER_NAME_FORMAT type, LPCWSTR lpComputerName )
 644 {
 645     TRACE("%d, %s\n", type, debugstr_w (lpComputerName));
 646     switch( type )
 647     {
 648     case ComputerNameNetBIOS:
 649     case ComputerNamePhysicalNetBIOS:
 650         return SetComputerNameW( lpComputerName );
 651     default:
 652         SetLastError( ERROR_ACCESS_DENIED );
 653         return FALSE;
 654     }
 655 }
 656
 657 /******************************************************************************
 658  * SetComputerNameExA [KERNEL32.@]
 659  *
 660  */
 661 BOOL WINAPI SetComputerNameExA( COMPUTER_NAME_FORMAT type, LPCSTR lpComputerName )
 662 {
 663     TRACE( "%d, %s\n", type, debugstr_a (lpComputerName) );
 664     switch( type )
 665     {
 666     case ComputerNameNetBIOS:
 667     case ComputerNamePhysicalNetBIOS:
 668         return SetComputerNameA( lpComputerName );
 669     default:
 670         SetLastError( ERROR_ACCESS_DENIED );
 671         return FALSE;
 672     }
 673 }
 674
 675 /***********************************************************************
 676  *              DnsHostnameToComputerNameA         (KERNEL32.@)
 677  */
 678 BOOL WINAPI DnsHostnameToComputerNameA(LPCSTR hostname,
 679     LPSTR computername, LPDWORD size)
 680 {
 681     DWORD len;
 682
 683     FIXME("(%s, %p, %p): stub\n", debugstr_a(hostname), computername, size);
 684
 685     if (!hostname || !size) return FALSE;
 686     len = lstrlenA(hostname);
 687
 688     if (len > MAX_COMPUTERNAME_LENGTH)
 689         len = MAX_COMPUTERNAME_LENGTH;
 690
 691     if (*size < len + 1)
 692     {
 693         *size = len;
 694         return FALSE;
 695     }
 696     if (!computername) return FALSE;
 697
 698     memcpy( computername, hostname, len );
 699     computername[len] = 0;
 700     return TRUE;
 701 }
 702
 703 /***********************************************************************
 704  *              DnsHostnameToComputerNameW         (KERNEL32.@)
 705  */
 706 BOOL WINAPI DnsHostnameToComputerNameW(LPCWSTR hostname,
 707     LPWSTR computername, LPDWORD size)
 708 {
 709     DWORD len;
 710
 711     FIXME("(%s, %p, %p): stub\n", debugstr_w(hostname), computername, size);
 712
 713     if (!hostname || !size) return FALSE;
 714     len = lstrlenW(hostname);
 715
 716     if (len > MAX_COMPUTERNAME_LENGTH)
 717         len = MAX_COMPUTERNAME_LENGTH;
 718
 719     if (*size < len + 1)
 720     {
 721         *size = len;
 722         return FALSE;
 723     }
 724     if (!computername) return FALSE;
 725
 726     memcpy( computername, hostname, len * sizeof(WCHAR) );
 727     computername[len] = 0;
 728     return TRUE;
 729 }