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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 #include "windef.h"
  39 #include "winbase.h"
  40 #include "winerror.h"
  41 #include "winnls.h"
  42 #include "winternl.h"
  43 #include "wine/unicode.h"
  44 #include "wine/exception.h"
  45 #include "excpt.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 /* filter for page-fault exceptions */
  66 static WINE_EXCEPTION_FILTER(page_fault)
  67 {
  68     if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
  69         return EXCEPTION_EXECUTE_HANDLER;
  70     return EXCEPTION_CONTINUE_SEARCH;
  71 }
  72
  73 /***********************************************************************
  74  *                    dns_gethostbyname (INTERNAL)
  75  *
  76  *  From hostname(1):
  77  *  "The FQDN is the name gethostbyname(2) returns for the host name returned by gethostname(2)."
  78  *
  79  *  Wine can use this technique only if the thread-safe gethostbyname_r is available.
  80  */
  81 #ifdef  HAVE_LINUX_GETHOSTBYNAME_R_6
  82 static BOOL dns_gethostbyname ( char *name, int *size )
  83 {
  84     struct hostent* host = NULL;
  85     char *extrabuf;
  86     int ebufsize = 1024;
  87     struct hostent hostentry;
  88     int locerr = ENOBUFS, res = ENOMEM;
  89
  90     extrabuf = HeapAlloc( GetProcessHeap(), 0, ebufsize ) ;
  91
  92     while( extrabuf )
  93     {
  94         res = gethostbyname_r ( name, &hostentry, extrabuf, ebufsize, &host, &locerr );
  95         if( res != ERANGE ) break;
  96         ebufsize *= 2;
  97         extrabuf = HeapReAlloc( GetProcessHeap(), 0, extrabuf, ebufsize ) ;
  98     }
  99
 100     if ( res )
 101         WARN ("Error in gethostbyname_r %d (%d)\n", res, locerr);
 102     else
 103     {
 104         int len = strlen ( host->h_name );
 105         if ( len < *size )
 106         {
 107             strcpy ( name, host->h_name );
 108             *size = len;
 109         }
 110         else
 111         {
 112             memcpy ( name, host->h_name, *size );
 113             name[*size] = 0;
 114             SetLastError ( ERROR_MORE_DATA );
 115             res = 1;
 116         }
 117     }
 118
 119     HeapFree( GetProcessHeap(), 0, extrabuf );
 120     return !res;
 121 }
 122 #else
 123 #  define dns_gethostbyname(name,size) 0
 124 #endif
 125
 126 /***********************************************************************
 127  *                     dns_fqdn (INTERNAL)
 128  */
 129 static BOOL dns_fqdn ( char *name, int *size )
 130 {
 131     if ( gethostname ( name, *size + 1 ) )
 132     {
 133         switch( errno )
 134         {
 135         case ENAMETOOLONG:
 136             SetLastError ( ERROR_MORE_DATA );
 137         default:
 138             SetLastError ( ERROR_INVALID_PARAMETER );
 139         }
 140         return FALSE;
 141     }
 142
 143     if ( !dns_gethostbyname ( name, size ) )
 144         *size = strlen ( name );
 145
 146     return TRUE;
 147 }
 148
 149 /***********************************************************************
 150  *                     dns_hostname (INTERNAL)
 151  */
 152 static BOOL dns_hostname ( char *name, int *size )
 153 {
 154     char *c;
 155     if ( ! dns_fqdn ( name, size ) ) return FALSE;
 156     c = strchr ( name, '.' );
 157     if (c)
 158     {
 159         *c = 0;
 160         *size = (c - name);
 161     }
 162     return TRUE;
 163 }
 164
 165 /***********************************************************************
 166  *                     dns_domainname (INTERNAL)
 167  */
 168 static BOOL dns_domainname ( char *name, int *size )
 169 {
 170     char *c;
 171     if ( ! dns_fqdn ( name, size ) ) return FALSE;
 172     c = strchr ( name, '.' );
 173     if (c)
 174     {
 175         c += 1;
 176         *size -= (c - name);
 177         memmove ( name, c, *size + 1 );
 178     }
 179     return TRUE;
 180 }
 181
 182 /***********************************************************************
 183  *                      _init_attr    (INTERNAL)
 184  */
 185 inline static void _init_attr ( OBJECT_ATTRIBUTES *attr, UNICODE_STRING *name )
 186 {
 187     attr->Length = sizeof (OBJECT_ATTRIBUTES);
 188     attr->RootDirectory = 0;
 189     attr->ObjectName = name;
 190     attr->Attributes = 0;
 191     attr->SecurityDescriptor = NULL;
 192     attr->SecurityQualityOfService = NULL;
 193 }
 194
 195 /***********************************************************************
 196  *           get_use_dns_option
 197  */
 198 static BOOL get_use_dns_option(void)
 199 {
 200     static const WCHAR NetworkW[] = {'S','o','f','t','w','a','r','e','\\',
 201                                      'W','i','n','e','\\','N','e','t','w','o','r','k',0};
 202     static const WCHAR UseDNSW[] = {'U','s','e','D','n','s','C','o','m','p','u','t','e','r','N','a','m','e',0};
 203
 204     char tmp[80];
 205     HANDLE root, hkey;
 206     DWORD dummy;
 207     OBJECT_ATTRIBUTES attr;
 208     UNICODE_STRING nameW;
 209     BOOL ret = TRUE;
 210
 211     _init_attr( &attr, &nameW );
 212     RtlOpenCurrentUser( KEY_ALL_ACCESS, &root );
 213     attr.RootDirectory = root;
 214     RtlInitUnicodeString( &nameW, NetworkW );
 215
 216     /* @@ Wine registry key: HKCU\Software\Wine\Network */
 217     if (!NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ))
 218     {
 219         RtlInitUnicodeString( &nameW, UseDNSW );
 220         if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, tmp, sizeof(tmp), &dummy ))
 221         {
 222             WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)tmp)->Data;
 223             ret = IS_OPTION_TRUE( str[0] );
 224         }
 225         NtClose( hkey );
 226     }
 227     NtClose( root );
 228     return ret;
 229 }
 230
 231
 232 /***********************************************************************
 233  *                      COMPUTERNAME_Init    (INTERNAL)
 234  */
 235 void COMPUTERNAME_Init (void)
 236 {
 237     HANDLE hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
 238     OBJECT_ATTRIBUTES attr;
 239     UNICODE_STRING nameW;
 240     char buf[offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ) + (MAX_COMPUTERNAME_LENGTH + 1) * sizeof( WCHAR )];
 241     DWORD len = sizeof( buf );
 242     LPWSTR computer_name = (LPWSTR) (buf + offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
 243     NTSTATUS st = STATUS_INTERNAL_ERROR;
 244
 245     TRACE("(void)\n");
 246     _init_attr ( &attr, &nameW );
 247
 248     RtlInitUnicodeString( &nameW, ComputerW );
 249     if ( ( st = NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ) ) != STATUS_SUCCESS )
 250         goto out;
 251
 252     attr.RootDirectory = hkey;
 253     RtlInitUnicodeString( &nameW, ComputerNameW );
 254     if ( (st = NtCreateKey( &hsubkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ) ) != STATUS_SUCCESS )
 255         goto out;
 256
 257     st = NtQueryValueKey( hsubkey, &nameW, KeyValuePartialInformation, buf, len, &len );
 258
 259     if ( st != STATUS_SUCCESS || get_use_dns_option() )
 260     {
 261         char hbuf[256];
 262         int hlen = sizeof (hbuf);
 263         char *dot;
 264         TRACE( "retrieving Unix host name\n" );
 265         if ( gethostname ( hbuf, hlen ) )
 266         {
 267             strcpy ( hbuf, default_ComputerName );
 268             WARN( "gethostname() error: %d, using host name %s\n", errno, hbuf );
 269         }
 270         hbuf[MAX_COMPUTERNAME_LENGTH] = 0;
 271         dot = strchr ( hbuf, '.' );
 272         if ( dot ) *dot = 0;
 273         hlen = strlen ( hbuf );
 274         len = MultiByteToWideChar( CP_ACP, 0, hbuf, hlen + 1, computer_name, MAX_COMPUTERNAME_LENGTH + 1 )
 275             * sizeof( WCHAR );
 276         if ( NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, computer_name, len ) != STATUS_SUCCESS )
 277             WARN ( "failed to set ComputerName\n" );
 278     }
 279     else if ( st == STATUS_SUCCESS)
 280     {
 281         len = (len - offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
 282         TRACE( "found in registry\n" );
 283     }
 284     else goto out;
 285
 286     NtClose( hsubkey );
 287     TRACE(" ComputerName: %s (%lu)\n", debugstr_w ( computer_name ), len / sizeof(WCHAR));
 288
 289     RtlInitUnicodeString( &nameW, ActiveComputerNameW );
 290     if ( ( st = NtCreateKey( &hsubkey, KEY_ALL_ACCESS, &attr, 0, NULL, REG_OPTION_VOLATILE, NULL ) )
 291          != STATUS_SUCCESS )
 292         goto out;
 293
 294     RtlInitUnicodeString( &nameW, ComputerNameW );
 295     st = NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, computer_name, len );
 296
 297 out:
 298     NtClose( hsubkey );
 299     NtClose( hkey );
 300
 301     if ( st == STATUS_SUCCESS )
 302         TRACE( "success\n" );
 303     else
 304     {
 305         WARN( "status trying to set ComputerName: %lx\n", st );
 306         SetLastError ( RtlNtStatusToDosError ( st ) );
 307     }
 308 }
 309
 310
 311 /***********************************************************************
 312  *              GetComputerNameW         (KERNEL32.@)
 313  */
 314 BOOL WINAPI GetComputerNameW(LPWSTR name,LPDWORD size)
 315 {
 316     UNICODE_STRING nameW;
 317     OBJECT_ATTRIBUTES attr;
 318     HANDLE hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
 319     char buf[offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ) + (MAX_COMPUTERNAME_LENGTH + 1) * sizeof( WCHAR )];
 320     DWORD len = sizeof( buf );
 321     LPWSTR theName = (LPWSTR) (buf + offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
 322     NTSTATUS st = STATUS_INVALID_PARAMETER;
 323
 324     TRACE ("%p %p\n", name, size);
 325
 326     _init_attr ( &attr, &nameW );
 327     RtlInitUnicodeString( &nameW, ComputerW );
 328     if ( ( st = NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
 329         goto out;
 330
 331     attr.RootDirectory = hkey;
 332     RtlInitUnicodeString( &nameW, ActiveComputerNameW );
 333     if ( ( st = NtOpenKey( &hsubkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
 334         goto out;
 335
 336     RtlInitUnicodeString( &nameW, ComputerNameW );
 337     if ( ( st = NtQueryValueKey( hsubkey, &nameW, KeyValuePartialInformation, buf, len, &len ) )
 338          != STATUS_SUCCESS )
 339         goto out;
 340
 341     len = (len -offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data )) / sizeof (WCHAR) - 1;
 342     TRACE ("ComputerName is %s (length %lu)\n", debugstr_w ( theName ), len);
 343
 344     __TRY
 345     {
 346         if ( *size < len )
 347         {
 348             memcpy ( name, theName, *size * sizeof (WCHAR) );
 349             name[*size] = 0;
 350             *size = len;
 351             st = STATUS_MORE_ENTRIES;
 352         }
 353         else
 354         {
 355             memcpy ( name, theName, len * sizeof (WCHAR) );
 356             name[len] = 0;
 357             *size = len;
 358             st = STATUS_SUCCESS;
 359         }
 360     }
 361     __EXCEPT(page_fault)
 362     {
 363         st = STATUS_INVALID_PARAMETER;
 364     }
 365     __ENDTRY
 366
 367 out:
 368     NtClose ( hsubkey );
 369     NtClose ( hkey );
 370
 371     if ( st == STATUS_SUCCESS )
 372         return TRUE;
 373     else
 374     {
 375         SetLastError ( RtlNtStatusToDosError ( st ) );
 376         WARN ( "Status %lu reading computer name from registry\n", st );
 377         return FALSE;
 378     }
 379 }
 380
 381 /***********************************************************************
 382  *              GetComputerNameA         (KERNEL32.@)
 383  */
 384 BOOL WINAPI GetComputerNameA(LPSTR name, LPDWORD size)
 385 {
 386     WCHAR nameW[ MAX_COMPUTERNAME_LENGTH + 1 ];
 387     DWORD sizeW = MAX_COMPUTERNAME_LENGTH;
 388     unsigned int len;
 389     BOOL ret;
 390
 391     if ( !GetComputerNameW (nameW, &sizeW) ) return FALSE;
 392
 393     len = WideCharToMultiByte ( CP_ACP, 0, nameW, sizeW, NULL, 0, NULL, 0 );
 394     __TRY
 395     {
 396         if ( *size < len )
 397         {
 398             WideCharToMultiByte ( CP_ACP, 0, nameW, sizeW, name, *size, NULL, 0 );
 399             name[*size] = 0;
 400             *size = len;
 401             SetLastError( ERROR_MORE_DATA );
 402             ret = FALSE;
 403         }
 404         else
 405         {
 406             WideCharToMultiByte ( CP_ACP, 0, nameW, sizeW, name, len, NULL, 0 );
 407             name[len] = 0;
 408             *size = len;
 409             ret = TRUE;
 410         }
 411     }
 412     __EXCEPT(page_fault)
 413     {
 414         SetLastError( ERROR_INVALID_PARAMETER );
 415         ret = FALSE;
 416     }
 417     __ENDTRY
 418
 419     return ret;
 420 }
 421
 422 /***********************************************************************
 423  *              GetComputerNameExA         (KERNEL32.@)
 424  */
 425 BOOL WINAPI GetComputerNameExA(COMPUTER_NAME_FORMAT type, LPSTR name, LPDWORD size)
 426 {
 427     char buf[256];
 428     int len = sizeof (buf), ret;
 429     TRACE("%d, %p, %p\n", type, name, size);
 430     switch( type )
 431     {
 432     case ComputerNameNetBIOS:
 433     case ComputerNamePhysicalNetBIOS:
 434         return GetComputerNameA (name, size);
 435     case ComputerNameDnsHostname:
 436     case ComputerNamePhysicalDnsHostname:
 437         ret = dns_hostname (buf, &len);
 438         break;
 439     case ComputerNameDnsDomain:
 440     case ComputerNamePhysicalDnsDomain:
 441         ret = dns_domainname (buf, &len);
 442         break;
 443     case ComputerNameDnsFullyQualified:
 444     case ComputerNamePhysicalDnsFullyQualified:
 445         ret = dns_fqdn (buf, &len);
 446         break;
 447     default:
 448         SetLastError (ERROR_INVALID_PARAMETER);
 449         return FALSE;
 450     }
 451
 452     if ( ret )
 453     {
 454         TRACE ("-> %s (%d)\n", debugstr_a (buf), len);
 455         __TRY
 456         {
 457             if ( *size < len )
 458             {
 459                 memcpy( name, buf, *size );
 460                 name[*size] = 0;
 461                 *size = len;
 462                 SetLastError( ERROR_MORE_DATA );
 463                 ret = FALSE;
 464             }
 465             else
 466             {
 467                 memcpy( name, buf, len );
 468                 name[len] = 0;
 469                 *size = len;
 470                 ret = TRUE;
 471             }
 472         }
 473         __EXCEPT(page_fault)
 474         {
 475             SetLastError( ERROR_INVALID_PARAMETER );
 476             return FALSE;
 477         }
 478         __ENDTRY
 479     }
 480
 481     return ret;
 482 }
 483
 484
 485 /***********************************************************************
 486  *              GetComputerNameExW         (KERNEL32.@)
 487  */
 488 BOOL WINAPI GetComputerNameExW( COMPUTER_NAME_FORMAT type, LPWSTR name, LPDWORD size )
 489 {
 490     char buf[256];
 491     int len = sizeof (buf), ret;
 492
 493     TRACE("%d, %p, %p\n", type, name, size);
 494     switch( type )
 495     {
 496     case ComputerNameNetBIOS:
 497     case ComputerNamePhysicalNetBIOS:
 498         return GetComputerNameW (name, size);
 499     case ComputerNameDnsHostname:
 500     case ComputerNamePhysicalDnsHostname:
 501         ret = dns_hostname (buf, &len);
 502         break;
 503     case ComputerNameDnsDomain:
 504     case ComputerNamePhysicalDnsDomain:
 505         ret = dns_domainname (buf, &len);
 506         break;
 507     case ComputerNameDnsFullyQualified:
 508     case ComputerNamePhysicalDnsFullyQualified:
 509         ret = dns_fqdn (buf, &len);
 510         break;
 511     default:
 512         SetLastError (ERROR_INVALID_PARAMETER);
 513         return FALSE;
 514     }
 515
 516     if ( ret )
 517     {
 518         TRACE ("-> %s (%d)\n", debugstr_a (buf), len);
 519         __TRY
 520         {
 521             unsigned int lenW = MultiByteToWideChar( CP_ACP, 0, buf, len, NULL, 0 );
 522             if ( *size < lenW )
 523             {
 524                 MultiByteToWideChar( CP_ACP, 0, buf, len, name, *size );
 525                 name[*size] = 0;
 526                 *size = lenW;
 527                 SetLastError( ERROR_MORE_DATA );
 528                 ret = FALSE;
 529             }
 530             else
 531             {
 532                 MultiByteToWideChar( CP_ACP, 0, buf, len, name, lenW );
 533                 name[lenW] = 0;
 534                 *size = lenW;
 535                 ret = TRUE;
 536             }
 537         }
 538         __EXCEPT(page_fault)
 539         {
 540             SetLastError( ERROR_INVALID_PARAMETER );
 541             return FALSE;
 542         }
 543         __ENDTRY
 544     }
 545
 546     return ret;
 547 }
 548
 549 /******************************************************************************
 550  * netbios_char (INTERNAL)
 551  */
 552 static WCHAR netbios_char ( WCHAR wc )
 553 {
 554     static const WCHAR special[] = {'!','@','#','$','%','^','&','\'',')','(','-','_','{','}','~'};
 555     static const WCHAR deflt = '_';
 556     unsigned int i;
 557
 558     if ( isalnumW ( wc ) ) return wc;
 559     for ( i = 0; i < sizeof (special) / sizeof (WCHAR); i++ )
 560         if ( wc == special[i] ) return wc;
 561     return deflt;
 562 }
 563
 564 /******************************************************************************
 565  * SetComputerNameW [KERNEL32.@]
 566  *
 567  * PARAMS
 568  *    lpComputerName [I] Address of new computer name
 569  *
 570  * RETURNS STD
 571  */
 572 BOOL WINAPI SetComputerNameW( LPCWSTR lpComputerName )
 573 {
 574     UNICODE_STRING nameW;
 575     OBJECT_ATTRIBUTES attr;
 576     HANDLE hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
 577     int plen = strlenW ( lpComputerName );
 578     int i;
 579     NTSTATUS st = STATUS_INTERNAL_ERROR;
 580
 581     if (get_use_dns_option())
 582     {
 583         /* This check isn't necessary, but may help debugging problems. */
 584         WARN( "Disabled by Wine Configuration.\n" );
 585         WARN( "Set \"UseDnsComputerName\" = \"N\" in category [Network] to enable.\n" );
 586         SetLastError ( ERROR_ACCESS_DENIED );
 587         return FALSE;
 588     }
 589
 590     TRACE( "%s\n", debugstr_w (lpComputerName) );
 591
 592     /* Check parameter */
 593     if ( plen > MAX_COMPUTERNAME_LENGTH )
 594         goto out;
 595
 596     /* This is NT behaviour. Win 95/98 would coerce characters. */
 597     for ( i = 0; i < plen; i++ )
 598     {
 599         WCHAR wc = lpComputerName[i];
 600         if ( wc != netbios_char( wc ) )
 601             goto out;
 602     }
 603
 604     _init_attr ( &attr, &nameW );
 605
 606     RtlInitUnicodeString (&nameW, ComputerW);
 607     if ( ( st = NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
 608         goto out;
 609     attr.RootDirectory = hkey;
 610     RtlInitUnicodeString( &nameW, ComputerNameW );
 611     if ( ( st = NtOpenKey( &hsubkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
 612         goto out;
 613     if ( ( st = NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, lpComputerName, ( plen + 1) * sizeof(WCHAR) ) )
 614          != STATUS_SUCCESS )
 615         goto out;
 616
 617 out:
 618     NtClose( hsubkey );
 619     NtClose( hkey );
 620
 621     if ( st == STATUS_SUCCESS )
 622     {
 623         TRACE( "ComputerName changed\n" );
 624         return TRUE;
 625     }
 626
 627     else
 628     {
 629         SetLastError ( RtlNtStatusToDosError ( st ) );
 630         WARN ( "status %lu\n", st );
 631         return FALSE;
 632     }
 633 }
 634
 635 /******************************************************************************
 636  * SetComputerNameA [KERNEL32.@]
 637  */
 638 BOOL WINAPI SetComputerNameA( LPCSTR lpComputerName )
 639 {
 640     BOOL ret;
 641     DWORD len = MultiByteToWideChar( CP_ACP, 0, lpComputerName, -1, NULL, 0 );
 642     LPWSTR nameW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
 643
 644     MultiByteToWideChar( CP_ACP, 0, lpComputerName, -1, nameW, len );
 645     ret = SetComputerNameW( nameW );
 646     HeapFree( GetProcessHeap(), 0, nameW );
 647     return ret;
 648 }
 649
 650 /******************************************************************************
 651  * SetComputerNameExW [KERNEL32.@]
 652  *
 653  */
 654 BOOL WINAPI SetComputerNameExW( COMPUTER_NAME_FORMAT type, LPCWSTR lpComputerName )
 655 {
 656     TRACE("%d, %s\n", type, debugstr_w (lpComputerName));
 657     switch( type )
 658     {
 659     case ComputerNameNetBIOS:
 660     case ComputerNamePhysicalNetBIOS:
 661         return SetComputerNameW( lpComputerName );
 662     default:
 663         SetLastError( ERROR_ACCESS_DENIED );
 664         return FALSE;
 665     }
 666 }
 667
 668 /******************************************************************************
 669  * SetComputerNameExA [KERNEL32.@]
 670  *
 671  */
 672 BOOL WINAPI SetComputerNameExA( COMPUTER_NAME_FORMAT type, LPCSTR lpComputerName )
 673 {
 674     TRACE( "%d, %s\n", type, debugstr_a (lpComputerName) );
 675     switch( type )
 676     {
 677     case ComputerNameNetBIOS:
 678     case ComputerNamePhysicalNetBIOS:
 679         return SetComputerNameA( lpComputerName );
 680     default:
 681         SetLastError( ERROR_ACCESS_DENIED );
 682         return FALSE;
 683     }
 684 }
 685
 686 /***********************************************************************
 687  *              DnsHostnameToComputerNameA         (KERNEL32.@)
 688  */
 689 BOOL WINAPI DnsHostnameToComputerNameA(LPCSTR hostname,
 690     LPSTR computername, LPDWORD size)
 691 {
 692     DWORD len;
 693
 694     FIXME("(%s, %p, %p): stub\n", debugstr_a(hostname), computername, size);
 695
 696     if (!hostname || !size) return FALSE;
 697     len = lstrlenA(hostname);
 698
 699     if (len > MAX_COMPUTERNAME_LENGTH)
 700         len = MAX_COMPUTERNAME_LENGTH;
 701
 702     if (*size < len)
 703     {
 704         *size = len;
 705         return FALSE;
 706     }
 707     if (!computername) return FALSE;
 708
 709     memcpy( computername, hostname, len );
 710     computername[len + 1] = 0;
 711     return TRUE;
 712 }
 713
 714 /***********************************************************************
 715  *              DnsHostnameToComputerNameW         (KERNEL32.@)
 716  */
 717 BOOL WINAPI DnsHostnameToComputerNameW(LPCWSTR hostname,
 718     LPWSTR computername, LPDWORD size)
 719 {
 720     DWORD len;
 721
 722     FIXME("(%s, %p, %p): stub\n", debugstr_w(hostname), computername, size);
 723
 724     if (!hostname || !size) return FALSE;
 725     len = lstrlenW(hostname);
 726
 727     if (len > MAX_COMPUTERNAME_LENGTH)
 728         len = MAX_COMPUTERNAME_LENGTH;
 729
 730     if (*size < len)
 731     {
 732         *size = len;
 733         return FALSE;
 734     }
 735     if (!computername) return FALSE;
 736
 737     memcpy( computername, hostname, len * sizeof(WCHAR) );
 738     computername[len + 1] = 0;
 739     return TRUE;
 740 }