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Sweden-Number/dlls/kernel/computername.c

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/*
* Win32 kernel functions
*
* Copyright 1995 Martin von Loewis and Cameron Heide
* Copyright 1999 Peter Ganten
* Copyright 2002 Martin Wilck
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdlib.h>
#include <errno.h>
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#include "winbase.h"
#include "winerror.h"
#include "winnls.h"
#include "winternl.h"
#include "wine/unicode.h"
#include "wine/exception.h"
#include "excpt.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(computername);
/* Registry key and value names */
static const WCHAR ComputerW[] = {'M','a','c','h','i','n','e','\\',
'S','y','s','t','e','m','\\',
'C','u','r','r','e','n','t','C','o','n','t','r','o','l','S','e','t','\\',
'C','o','n','t','r','o','l','\\',
'C','o','m','p','u','t','e','r','N','a','m','e',0};
static const WCHAR ActiveComputerNameW[] = {'A','c','t','i','v','e','C','o','m','p','u','t','e','r','N','a','m','e',0};
static const WCHAR ComputerNameW[] = {'C','o','m','p','u','t','e','r','N','a','m','e',0};
static const char default_ComputerName[] = "WINE";
#define IS_OPTION_TRUE(ch) ((ch) == 'y' || (ch) == 'Y' || (ch) == 't' || (ch) == 'T' || (ch) == '1')
/* filter for page-fault exceptions */
static WINE_EXCEPTION_FILTER(page_fault)
{
if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
return EXCEPTION_EXECUTE_HANDLER;
return EXCEPTION_CONTINUE_SEARCH;
}
/***********************************************************************
* dns_gethostbyname (INTERNAL)
*
* From hostname(1):
* "The FQDN is the name gethostbyname(2) returns for the host name returned by gethostname(2)."
*
* Wine can use this technique only if the thread-safe gethostbyname_r is available.
*/
#ifdef HAVE_LINUX_GETHOSTBYNAME_R_6
static BOOL dns_gethostbyname ( char *name, int *size )
{
struct hostent* host = NULL;
char *extrabuf;
int ebufsize = 1024;
struct hostent hostentry;
int locerr = ENOBUFS, res = ENOMEM;
extrabuf = HeapAlloc( GetProcessHeap(), 0, ebufsize ) ;
while( extrabuf )
{
res = gethostbyname_r ( name, &hostentry, extrabuf, ebufsize, &host, &locerr );
if( res != ERANGE ) break;
ebufsize *= 2;
extrabuf = HeapReAlloc( GetProcessHeap(), 0, extrabuf, ebufsize ) ;
}
if ( res )
WARN ("Error in gethostbyname_r %d (%d)\n", res, locerr);
else
{
size_t len = strlen ( host->h_name );
if ( len < *size )
{
strcpy ( name, host->h_name );
*size = len;
}
else
{
memcpy ( name, host->h_name, *size );
name[*size] = 0;
SetLastError ( ERROR_MORE_DATA );
res = 1;
}
}
HeapFree( GetProcessHeap(), 0, extrabuf );
return !res;
}
#else
# define dns_gethostbyname(name,size) 0
#endif
/***********************************************************************
* dns_fqdn (INTERNAL)
*/
static BOOL dns_fqdn ( char *name, int *size )
{
if ( gethostname ( name, *size + 1 ) )
{
switch( errno )
{
case ENAMETOOLONG:
SetLastError ( ERROR_MORE_DATA );
default:
SetLastError ( ERROR_INVALID_PARAMETER );
}
return FALSE;
}
if ( !dns_gethostbyname ( name, size ) )
*size = strlen ( name );
return TRUE;
}
/***********************************************************************
* dns_hostname (INTERNAL)
*/
static BOOL dns_hostname ( char *name, int *size )
{
char *c;
if ( ! dns_fqdn ( name, size ) ) return FALSE;
c = strchr ( name, '.' );
if (c)
{
*c = 0;
*size = (c - name);
}
return TRUE;
}
/***********************************************************************
* dns_domainname (INTERNAL)
*/
static BOOL dns_domainname ( char *name, int *size )
{
char *c;
if ( ! dns_fqdn ( name, size ) ) return FALSE;
c = strchr ( name, '.' );
if (c)
{
c += 1;
*size -= (c - name);
memmove ( name, c, *size + 1 );
}
return TRUE;
}
/***********************************************************************
* _init_attr (INTERNAL)
*/
inline static void _init_attr ( OBJECT_ATTRIBUTES *attr, UNICODE_STRING *name )
{
attr->Length = sizeof (OBJECT_ATTRIBUTES);
attr->RootDirectory = 0;
attr->ObjectName = name;
attr->Attributes = 0;
attr->SecurityDescriptor = NULL;
attr->SecurityQualityOfService = NULL;
}
/***********************************************************************
* get_use_dns_option
*/
static BOOL get_use_dns_option(void)
{
static const WCHAR NetworkW[] = {'M','a','c','h','i','n','e','\\',
'S','o','f','t','w','a','r','e','\\',
'W','i','n','e','\\','W','i','n','e','\\',
'C','o','n','f','i','g','\\','N','e','t','w','o','r','k',0};
static const WCHAR UseDNSW[] = {'U','s','e','D','n','s','C','o','m','p','u','t','e','r','N','a','m','e',0};
char tmp[80];
HKEY hkey;
DWORD dummy;
OBJECT_ATTRIBUTES attr;
UNICODE_STRING nameW;
BOOL ret = TRUE;
_init_attr( &attr, &nameW );
RtlInitUnicodeString( &nameW, NetworkW );
if (!NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ))
{
RtlInitUnicodeString( &nameW, UseDNSW );
if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, tmp, sizeof(tmp), &dummy ))
{
WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)tmp)->Data;
ret = IS_OPTION_TRUE( str[0] );
}
NtClose( hkey );
}
return ret;
}
/***********************************************************************
* COMPUTERNAME_Init (INTERNAL)
*/
void COMPUTERNAME_Init (void)
{
HKEY hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
OBJECT_ATTRIBUTES attr;
UNICODE_STRING nameW;
char buf[offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ) + (MAX_COMPUTERNAME_LENGTH + 1) * sizeof( WCHAR )];
DWORD len = sizeof( buf );
LPWSTR computer_name = (LPWSTR) (buf + offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
NTSTATUS st = STATUS_INTERNAL_ERROR;
TRACE("(void)\n");
_init_attr ( &attr, &nameW );
RtlInitUnicodeString( &nameW, ComputerW );
if ( ( st = NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ) ) != STATUS_SUCCESS )
goto out;
attr.RootDirectory = hkey;
RtlInitUnicodeString( &nameW, ComputerNameW );
if ( (st = NtCreateKey( &hsubkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ) ) != STATUS_SUCCESS )
goto out;
st = NtQueryValueKey( hsubkey, &nameW, KeyValuePartialInformation, buf, len, &len );
if ( st == STATUS_OBJECT_NAME_NOT_FOUND || ( st == STATUS_SUCCESS && get_use_dns_option()))
{
char hbuf[256];
int hlen = sizeof (hbuf);
char *dot;
TRACE( "retrieving Unix host name\n" );
if ( gethostname ( hbuf, hlen ) )
{
strcpy ( hbuf, default_ComputerName );
WARN( "gethostname() error: %d, using host name %s\n", errno, hbuf );
}
hbuf[MAX_COMPUTERNAME_LENGTH] = 0;
dot = strchr ( hbuf, '.' );
if ( dot ) *dot = 0;
hlen = strlen ( hbuf );
len = MultiByteToWideChar( CP_ACP, 0, hbuf, hlen + 1, computer_name, MAX_COMPUTERNAME_LENGTH + 1 )
* sizeof( WCHAR );
if ( NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, computer_name, len ) != STATUS_SUCCESS )
WARN ( "failed to set ComputerName" );
}
else if ( st == STATUS_SUCCESS)
{
len = (len - offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
TRACE( "found in registry\n" );
}
else goto out;
NtClose( hsubkey );
TRACE(" ComputerName: %s (%lu)\n", debugstr_w ( computer_name ), len / sizeof(WCHAR));
RtlInitUnicodeString( &nameW, ActiveComputerNameW );
if ( ( st = NtCreateKey( &hsubkey, KEY_ALL_ACCESS, &attr, 0, NULL, REG_OPTION_VOLATILE, NULL ) )
!= STATUS_SUCCESS )
goto out;
RtlInitUnicodeString( &nameW, ComputerNameW );
st = NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, computer_name, len );
out:
NtClose( hsubkey );
NtClose( hkey );
if ( st == STATUS_SUCCESS )
TRACE( "success\n" );
else
{
WARN( "status trying to set ComputerName: %lx\n", st );
SetLastError ( RtlNtStatusToDosError ( st ) );
}
}
/***********************************************************************
* GetComputerNameW (KERNEL32.@)
*/
BOOL WINAPI GetComputerNameW(LPWSTR name,LPDWORD size)
{
UNICODE_STRING nameW;
OBJECT_ATTRIBUTES attr;
HKEY hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
char buf[offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ) + (MAX_COMPUTERNAME_LENGTH + 1) * sizeof( WCHAR )];
DWORD len = sizeof( buf );
LPWSTR theName = (LPWSTR) (buf + offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data ));
NTSTATUS st = STATUS_INVALID_PARAMETER;
TRACE ("%p %p\n", name, size);
_init_attr ( &attr, &nameW );
RtlInitUnicodeString( &nameW, ComputerW );
if ( ( st = NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
goto out;
attr.RootDirectory = hkey;
RtlInitUnicodeString( &nameW, ActiveComputerNameW );
if ( ( st = NtOpenKey( &hsubkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
goto out;
RtlInitUnicodeString( &nameW, ComputerNameW );
if ( ( st = NtQueryValueKey( hsubkey, &nameW, KeyValuePartialInformation, buf, len, &len ) )
!= STATUS_SUCCESS )
goto out;
len = (len -offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data )) / sizeof (WCHAR) - 1;
TRACE ("ComputerName is %s (length %lu)\n", debugstr_w ( theName ), len);
__TRY
{
if ( *size < len )
{
memcpy ( name, theName, *size * sizeof (WCHAR) );
name[*size] = 0;
*size = len;
st = STATUS_MORE_ENTRIES;
}
else
{
memcpy ( name, theName, len * sizeof (WCHAR) );
name[len] = 0;
*size = len;
st = STATUS_SUCCESS;
}
}
__EXCEPT(page_fault)
{
st = STATUS_INVALID_PARAMETER;
}
__ENDTRY
out:
NtClose ( hsubkey );
NtClose ( hkey );
if ( st == STATUS_SUCCESS )
return TRUE;
else
{
SetLastError ( RtlNtStatusToDosError ( st ) );
WARN ( "Status %lu reading computer name from registry\n", st );
return FALSE;
}
}
/***********************************************************************
* GetComputerNameA (KERNEL32.@)
*/
BOOL WINAPI GetComputerNameA(LPSTR name, LPDWORD size)
{
WCHAR nameW[ MAX_COMPUTERNAME_LENGTH + 1 ];
DWORD sizeW = MAX_COMPUTERNAME_LENGTH;
int len;
BOOL ret;
if ( !GetComputerNameW (nameW, &sizeW) ) return FALSE;
len = WideCharToMultiByte ( CP_ACP, 0, nameW, sizeW, NULL, 0, NULL, 0 );
__TRY
{
if ( *size < len )
{
WideCharToMultiByte ( CP_ACP, 0, nameW, sizeW, name, *size, NULL, 0 );
name[*size] = 0;
*size = len;
SetLastError( ERROR_MORE_DATA );
ret = FALSE;
}
else
{
WideCharToMultiByte ( CP_ACP, 0, nameW, sizeW, name, len, NULL, 0 );
name[len] = 0;
*size = len;
ret = TRUE;
}
}
__EXCEPT(page_fault)
{
SetLastError( ERROR_INVALID_PARAMETER );
ret = FALSE;
}
__ENDTRY
return ret;
}
/***********************************************************************
* GetComputerNameExA (KERNEL32.@)
*/
BOOL WINAPI GetComputerNameExA(COMPUTER_NAME_FORMAT type, LPSTR name, LPDWORD size)
{
char buf[256];
int len = sizeof (buf), ret;
TRACE("%d, %p, %p\n", type, name, size);
switch( type )
{
case ComputerNameNetBIOS:
case ComputerNamePhysicalNetBIOS:
return GetComputerNameA (name, size);
case ComputerNameDnsHostname:
case ComputerNamePhysicalDnsHostname:
ret = dns_hostname (buf, &len);
break;
case ComputerNameDnsDomain:
case ComputerNamePhysicalDnsDomain:
ret = dns_domainname (buf, &len);
break;
case ComputerNameDnsFullyQualified:
case ComputerNamePhysicalDnsFullyQualified:
ret = dns_fqdn (buf, &len);
break;
default:
SetLastError (ERROR_INVALID_PARAMETER);
return FALSE;
}
if ( ret )
{
TRACE ("-> %s (%d)\n", debugstr_a (buf), len);
__TRY
{
if ( *size < len )
{
memcpy( name, buf, *size );
name[*size] = 0;
*size = len;
SetLastError( ERROR_MORE_DATA );
ret = FALSE;
}
else
{
memcpy( name, buf, len );
name[len] = 0;
*size = len;
ret = TRUE;
}
}
__EXCEPT(page_fault)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
__ENDTRY
}
return ret;
}
/***********************************************************************
* GetComputerNameExW (KERNEL32.@)
*/
BOOL WINAPI GetComputerNameExW( COMPUTER_NAME_FORMAT type, LPWSTR name, LPDWORD size )
{
char buf[256];
int len = sizeof (buf), ret;
TRACE("%d, %p, %p\n", type, name, size);
switch( type )
{
case ComputerNameNetBIOS:
case ComputerNamePhysicalNetBIOS:
return GetComputerNameW (name, size);
case ComputerNameDnsHostname:
case ComputerNamePhysicalDnsHostname:
ret = dns_hostname (buf, &len);
break;
case ComputerNameDnsDomain:
case ComputerNamePhysicalDnsDomain:
ret = dns_domainname (buf, &len);
break;
case ComputerNameDnsFullyQualified:
case ComputerNamePhysicalDnsFullyQualified:
ret = dns_fqdn (buf, &len);
break;
default:
SetLastError (ERROR_INVALID_PARAMETER);
return FALSE;
}
if ( ret )
{
TRACE ("-> %s (%d)\n", debugstr_a (buf), len);
__TRY
{
int lenW = MultiByteToWideChar( CP_ACP, 0, buf, len, NULL, 0 );
if ( *size < lenW )
{
MultiByteToWideChar( CP_ACP, 0, buf, len, name, *size );
name[*size] = 0;
*size = lenW;
SetLastError( ERROR_MORE_DATA );
ret = FALSE;
}
else
{
MultiByteToWideChar( CP_ACP, 0, buf, len, name, lenW );
name[lenW] = 0;
*size = lenW;
ret = TRUE;
}
}
__EXCEPT(page_fault)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
__ENDTRY
}
return ret;
}
/******************************************************************************
* netbios_char (INTERNAL)
*/
static WCHAR netbios_char ( WCHAR wc )
{
static const WCHAR special[] = {'!','@','#','$','%','^','&','\'',')','(','-','_','{','}','~'};
static const WCHAR deflt = '_';
int i;
if ( isalnumW ( wc ) ) return wc;
for ( i = 0; i < sizeof (special) / sizeof (WCHAR); i++ )
if ( wc == special[i] ) return wc;
return deflt;
}
/******************************************************************************
* SetComputerNameW [KERNEL32.@]
*
* PARAMS
* lpComputerName [I] Address of new computer name
*
* RETURNS STD
*/
BOOL WINAPI SetComputerNameW( LPCWSTR lpComputerName )
{
UNICODE_STRING nameW;
OBJECT_ATTRIBUTES attr;
HKEY hkey = INVALID_HANDLE_VALUE, hsubkey = INVALID_HANDLE_VALUE;
int plen = strlenW ( lpComputerName );
int i;
NTSTATUS st = STATUS_INTERNAL_ERROR;
if (get_use_dns_option())
{
/* This check isn't necessary, but may help debugging problems. */
WARN( "Disabled by Wine Configuration.\n" );
WARN( "Set \"UseDnsComputerName\" = \"N\" in category [Network] to enable.\n" );
SetLastError ( ERROR_ACCESS_DENIED );
return FALSE;
}
TRACE( "%s\n", debugstr_w (lpComputerName) );
/* Check parameter */
if ( plen > MAX_COMPUTERNAME_LENGTH )
goto out;
/* This is NT behaviour. Win 95/98 would coerce characters. */
for ( i = 0; i < plen; i++ )
{
WCHAR wc = lpComputerName[i];
if ( wc != netbios_char( wc ) )
goto out;
}
_init_attr ( &attr, &nameW );
RtlInitUnicodeString (&nameW, ComputerW);
if ( ( st = NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
goto out;
attr.RootDirectory = hkey;
RtlInitUnicodeString( &nameW, ComputerNameW );
if ( ( st = NtOpenKey( &hsubkey, KEY_ALL_ACCESS, &attr ) ) != STATUS_SUCCESS )
goto out;
if ( ( st = NtSetValueKey( hsubkey, &nameW, 0, REG_SZ, lpComputerName, ( plen + 1) * sizeof(WCHAR) ) )
!= STATUS_SUCCESS )
goto out;
out:
NtClose( hsubkey );
NtClose( hkey );
if ( st == STATUS_SUCCESS )
{
TRACE( "ComputerName changed\n" );
return TRUE;
}
else
{
SetLastError ( RtlNtStatusToDosError ( st ) );
WARN ( "status %lu\n", st );
return FALSE;
}
}
/******************************************************************************
* SetComputerNameA [KERNEL32.@]
*/
BOOL WINAPI SetComputerNameA( LPCSTR lpComputerName )
{
BOOL ret;
DWORD len = MultiByteToWideChar( CP_ACP, 0, lpComputerName, -1, NULL, 0 );
LPWSTR nameW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
MultiByteToWideChar( CP_ACP, 0, lpComputerName, -1, nameW, len );
ret = SetComputerNameW( nameW );
HeapFree( GetProcessHeap(), 0, nameW );
return ret;
}
/******************************************************************************
* SetComputerNameExW [KERNEL32.@]
*
*/
BOOL WINAPI SetComputerNameExW( COMPUTER_NAME_FORMAT type, LPCWSTR lpComputerName )
{
TRACE("%d, %s\n", type, debugstr_w (lpComputerName));
switch( type )
{
case ComputerNameNetBIOS:
case ComputerNamePhysicalNetBIOS:
return SetComputerNameW( lpComputerName );
default:
SetLastError( ERROR_ACCESS_DENIED );
return FALSE;
}
}
/******************************************************************************
* SetComputerNameExA [KERNEL32.@]
*
*/
BOOL WINAPI SetComputerNameExA( COMPUTER_NAME_FORMAT type, LPCSTR lpComputerName )
{
TRACE( "%d, %s\n", type, debugstr_a (lpComputerName) );
switch( type )
{
case ComputerNameNetBIOS:
case ComputerNamePhysicalNetBIOS:
return SetComputerNameA( lpComputerName );
default:
SetLastError( ERROR_ACCESS_DENIED );
return FALSE;
}
}
/***********************************************************************
* DnsHostnameToComputerNameA (KERNEL32.@)
*/
BOOL WINAPI DnsHostnameToComputerNameA(LPCSTR Hostname, LPSTR ComputerName,
LPDWORD nSize)
{
FIXME("(%s, %s, %08lx): stub\n", debugstr_a(Hostname),
debugstr_a(ComputerName), *nSize);
SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
return FALSE;
}
/***********************************************************************
* DnsHostnameToComputerNameW (KERNEL32.@)
*/
BOOL WINAPI DnsHostnameToComputerNameW(LPCWSTR Hostname, LPWSTR ComputerName,
LPDWORD nSize)
{
FIXME("(%s, %s, %08lx): stub\n", debugstr_w(Hostname),
debugstr_w(ComputerName), *nSize);
SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
return FALSE;
}
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