syscall_windows.go

Documentation: internal/syscall/windows

     1  // Copyright 2014 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package windows
     6  
     7  import (
     8  	"internal/unsafeheader"
     9  	"sync"
    10  	"syscall"
    11  	"unicode/utf16"
    12  	"unsafe"
    13  )
    14  
    15  // UTF16PtrToString is like UTF16ToString, but takes *uint16
    16  // as a parameter instead of []uint16.
    17  func UTF16PtrToString(p *uint16) string {
    18  	if p == nil {
    19  		return ""
    20  	}
    21  	// Find NUL terminator.
    22  	end := unsafe.Pointer(p)
    23  	n := 0
    24  	for *(*uint16)(end) != 0 {
    25  		end = unsafe.Pointer(uintptr(end) + unsafe.Sizeof(*p))
    26  		n++
    27  	}
    28  	// Turn *uint16 into []uint16.
    29  	var s []uint16
    30  	hdr := (*unsafeheader.Slice)(unsafe.Pointer(&s))
    31  	hdr.Data = unsafe.Pointer(p)
    32  	hdr.Cap = n
    33  	hdr.Len = n
    34  	// Decode []uint16 into string.
    35  	return string(utf16.Decode(s))
    36  }
    37  
    38  const (
    39  	ERROR_SHARING_VIOLATION      syscall.Errno = 32
    40  	ERROR_LOCK_VIOLATION         syscall.Errno = 33
    41  	ERROR_NOT_SUPPORTED          syscall.Errno = 50
    42  	ERROR_CALL_NOT_IMPLEMENTED   syscall.Errno = 120
    43  	ERROR_INVALID_NAME           syscall.Errno = 123
    44  	ERROR_LOCK_FAILED            syscall.Errno = 167
    45  	ERROR_NO_UNICODE_TRANSLATION syscall.Errno = 1113
    46  )
    47  
    48  const GAA_FLAG_INCLUDE_PREFIX = 0x00000010
    49  
    50  const (
    51  	IF_TYPE_OTHER              = 1
    52  	IF_TYPE_ETHERNET_CSMACD    = 6
    53  	IF_TYPE_ISO88025_TOKENRING = 9
    54  	IF_TYPE_PPP                = 23
    55  	IF_TYPE_SOFTWARE_LOOPBACK  = 24
    56  	IF_TYPE_ATM                = 37
    57  	IF_TYPE_IEEE80211          = 71
    58  	IF_TYPE_TUNNEL             = 131
    59  	IF_TYPE_IEEE1394           = 144
    60  )
    61  
    62  type SocketAddress struct {
    63  	Sockaddr       *syscall.RawSockaddrAny
    64  	SockaddrLength int32
    65  }
    66  
    67  type IpAdapterUnicastAddress struct {
    68  	Length             uint32
    69  	Flags              uint32
    70  	Next               *IpAdapterUnicastAddress
    71  	Address            SocketAddress
    72  	PrefixOrigin       int32
    73  	SuffixOrigin       int32
    74  	DadState           int32
    75  	ValidLifetime      uint32
    76  	PreferredLifetime  uint32
    77  	LeaseLifetime      uint32
    78  	OnLinkPrefixLength uint8
    79  }
    80  
    81  type IpAdapterAnycastAddress struct {
    82  	Length  uint32
    83  	Flags   uint32
    84  	Next    *IpAdapterAnycastAddress
    85  	Address SocketAddress
    86  }
    87  
    88  type IpAdapterMulticastAddress struct {
    89  	Length  uint32
    90  	Flags   uint32
    91  	Next    *IpAdapterMulticastAddress
    92  	Address SocketAddress
    93  }
    94  
    95  type IpAdapterDnsServerAdapter struct {
    96  	Length   uint32
    97  	Reserved uint32
    98  	Next     *IpAdapterDnsServerAdapter
    99  	Address  SocketAddress
   100  }
   101  
   102  type IpAdapterPrefix struct {
   103  	Length       uint32
   104  	Flags        uint32
   105  	Next         *IpAdapterPrefix
   106  	Address      SocketAddress
   107  	PrefixLength uint32
   108  }
   109  
   110  type IpAdapterAddresses struct {
   111  	Length                uint32
   112  	IfIndex               uint32
   113  	Next                  *IpAdapterAddresses
   114  	AdapterName           *byte
   115  	FirstUnicastAddress   *IpAdapterUnicastAddress
   116  	FirstAnycastAddress   *IpAdapterAnycastAddress
   117  	FirstMulticastAddress *IpAdapterMulticastAddress
   118  	FirstDnsServerAddress *IpAdapterDnsServerAdapter
   119  	DnsSuffix             *uint16
   120  	Description           *uint16
   121  	FriendlyName          *uint16
   122  	PhysicalAddress       [syscall.MAX_ADAPTER_ADDRESS_LENGTH]byte
   123  	PhysicalAddressLength uint32
   124  	Flags                 uint32
   125  	Mtu                   uint32
   126  	IfType                uint32
   127  	OperStatus            uint32
   128  	Ipv6IfIndex           uint32
   129  	ZoneIndices           [16]uint32
   130  	FirstPrefix           *IpAdapterPrefix
   131  	/* more fields might be present here. */
   132  }
   133  
   134  type FILE_BASIC_INFO struct {
   135  	CreationTime   syscall.Filetime
   136  	LastAccessTime syscall.Filetime
   137  	LastWriteTime  syscall.Filetime
   138  	ChangedTime    syscall.Filetime
   139  	FileAttributes uint32
   140  }
   141  
   142  const (
   143  	IfOperStatusUp             = 1
   144  	IfOperStatusDown           = 2
   145  	IfOperStatusTesting        = 3
   146  	IfOperStatusUnknown        = 4
   147  	IfOperStatusDormant        = 5
   148  	IfOperStatusNotPresent     = 6
   149  	IfOperStatusLowerLayerDown = 7
   150  )
   151  
   152  //sys	GetAdaptersAddresses(family uint32, flags uint32, reserved uintptr, adapterAddresses *IpAdapterAddresses, sizePointer *uint32) (errcode error) = iphlpapi.GetAdaptersAddresses
   153  //sys	GetComputerNameEx(nameformat uint32, buf *uint16, n *uint32) (err error) = GetComputerNameExW
   154  //sys	MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) = MoveFileExW
   155  //sys	GetModuleFileName(module syscall.Handle, fn *uint16, len uint32) (n uint32, err error) = kernel32.GetModuleFileNameW
   156  //sys	SetFileInformationByHandle(handle syscall.Handle, fileInformationClass uint32, buf uintptr, bufsize uint32) (err error) = kernel32.SetFileInformationByHandle
   157  
   158  const (
   159  	WSA_FLAG_OVERLAPPED        = 0x01
   160  	WSA_FLAG_NO_HANDLE_INHERIT = 0x80
   161  
   162  	WSAEMSGSIZE syscall.Errno = 10040
   163  
   164  	MSG_PEEK   = 0x2
   165  	MSG_TRUNC  = 0x0100
   166  	MSG_CTRUNC = 0x0200
   167  
   168  	socket_error = uintptr(^uint32(0))
   169  )
   170  
   171  var WSAID_WSASENDMSG = syscall.GUID{
   172  	Data1: 0xa441e712,
   173  	Data2: 0x754f,
   174  	Data3: 0x43ca,
   175  	Data4: [8]byte{0x84, 0xa7, 0x0d, 0xee, 0x44, 0xcf, 0x60, 0x6d},
   176  }
   177  
   178  var WSAID_WSARECVMSG = syscall.GUID{
   179  	Data1: 0xf689d7c8,
   180  	Data2: 0x6f1f,
   181  	Data3: 0x436b,
   182  	Data4: [8]byte{0x8a, 0x53, 0xe5, 0x4f, 0xe3, 0x51, 0xc3, 0x22},
   183  }
   184  
   185  var sendRecvMsgFunc struct {
   186  	once     sync.Once
   187  	sendAddr uintptr
   188  	recvAddr uintptr
   189  	err      error
   190  }
   191  
   192  type WSAMsg struct {
   193  	Name        syscall.Pointer
   194  	Namelen     int32
   195  	Buffers     *syscall.WSABuf
   196  	BufferCount uint32
   197  	Control     syscall.WSABuf
   198  	Flags       uint32
   199  }
   200  
   201  //sys	WSASocket(af int32, typ int32, protocol int32, protinfo *syscall.WSAProtocolInfo, group uint32, flags uint32) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = ws2_32.WSASocketW
   202  
   203  func loadWSASendRecvMsg() error {
   204  	sendRecvMsgFunc.once.Do(func() {
   205  		var s syscall.Handle
   206  		s, sendRecvMsgFunc.err = syscall.Socket(syscall.AF_INET, syscall.SOCK_DGRAM, syscall.IPPROTO_UDP)
   207  		if sendRecvMsgFunc.err != nil {
   208  			return
   209  		}
   210  		defer syscall.CloseHandle(s)
   211  		var n uint32
   212  		sendRecvMsgFunc.err = syscall.WSAIoctl(s,
   213  			syscall.SIO_GET_EXTENSION_FUNCTION_POINTER,
   214  			(*byte)(unsafe.Pointer(&WSAID_WSARECVMSG)),
   215  			uint32(unsafe.Sizeof(WSAID_WSARECVMSG)),
   216  			(*byte)(unsafe.Pointer(&sendRecvMsgFunc.recvAddr)),
   217  			uint32(unsafe.Sizeof(sendRecvMsgFunc.recvAddr)),
   218  			&n, nil, 0)
   219  		if sendRecvMsgFunc.err != nil {
   220  			return
   221  		}
   222  		sendRecvMsgFunc.err = syscall.WSAIoctl(s,
   223  			syscall.SIO_GET_EXTENSION_FUNCTION_POINTER,
   224  			(*byte)(unsafe.Pointer(&WSAID_WSASENDMSG)),
   225  			uint32(unsafe.Sizeof(WSAID_WSASENDMSG)),
   226  			(*byte)(unsafe.Pointer(&sendRecvMsgFunc.sendAddr)),
   227  			uint32(unsafe.Sizeof(sendRecvMsgFunc.sendAddr)),
   228  			&n, nil, 0)
   229  	})
   230  	return sendRecvMsgFunc.err
   231  }
   232  
   233  func WSASendMsg(fd syscall.Handle, msg *WSAMsg, flags uint32, bytesSent *uint32, overlapped *syscall.Overlapped, croutine *byte) error {
   234  	err := loadWSASendRecvMsg()
   235  	if err != nil {
   236  		return err
   237  	}
   238  	r1, _, e1 := syscall.Syscall6(sendRecvMsgFunc.sendAddr, 6, uintptr(fd), uintptr(unsafe.Pointer(msg)), uintptr(flags), uintptr(unsafe.Pointer(bytesSent)), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(croutine)))
   239  	if r1 == socket_error {
   240  		if e1 != 0 {
   241  			err = errnoErr(e1)
   242  		} else {
   243  			err = syscall.EINVAL
   244  		}
   245  	}
   246  	return err
   247  }
   248  
   249  func WSARecvMsg(fd syscall.Handle, msg *WSAMsg, bytesReceived *uint32, overlapped *syscall.Overlapped, croutine *byte) error {
   250  	err := loadWSASendRecvMsg()
   251  	if err != nil {
   252  		return err
   253  	}
   254  	r1, _, e1 := syscall.Syscall6(sendRecvMsgFunc.recvAddr, 5, uintptr(fd), uintptr(unsafe.Pointer(msg)), uintptr(unsafe.Pointer(bytesReceived)), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(croutine)), 0)
   255  	if r1 == socket_error {
   256  		if e1 != 0 {
   257  			err = errnoErr(e1)
   258  		} else {
   259  			err = syscall.EINVAL
   260  		}
   261  	}
   262  	return err
   263  }
   264  
   265  const (
   266  	ComputerNameNetBIOS                   = 0
   267  	ComputerNameDnsHostname               = 1
   268  	ComputerNameDnsDomain                 = 2
   269  	ComputerNameDnsFullyQualified         = 3
   270  	ComputerNamePhysicalNetBIOS           = 4
   271  	ComputerNamePhysicalDnsHostname       = 5
   272  	ComputerNamePhysicalDnsDomain         = 6
   273  	ComputerNamePhysicalDnsFullyQualified = 7
   274  	ComputerNameMax                       = 8
   275  
   276  	MOVEFILE_REPLACE_EXISTING      = 0x1
   277  	MOVEFILE_COPY_ALLOWED          = 0x2
   278  	MOVEFILE_DELAY_UNTIL_REBOOT    = 0x4
   279  	MOVEFILE_WRITE_THROUGH         = 0x8
   280  	MOVEFILE_CREATE_HARDLINK       = 0x10
   281  	MOVEFILE_FAIL_IF_NOT_TRACKABLE = 0x20
   282  )
   283  
   284  func Rename(oldpath, newpath string) error {
   285  	from, err := syscall.UTF16PtrFromString(oldpath)
   286  	if err != nil {
   287  		return err
   288  	}
   289  	to, err := syscall.UTF16PtrFromString(newpath)
   290  	if err != nil {
   291  		return err
   292  	}
   293  	return MoveFileEx(from, to, MOVEFILE_REPLACE_EXISTING)
   294  }
   295  
   296  //sys LockFileEx(file syscall.Handle, flags uint32, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *syscall.Overlapped) (err error) = kernel32.LockFileEx
   297  //sys UnlockFileEx(file syscall.Handle, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *syscall.Overlapped) (err error) = kernel32.UnlockFileEx
   298  
   299  const (
   300  	LOCKFILE_FAIL_IMMEDIATELY = 0x00000001
   301  	LOCKFILE_EXCLUSIVE_LOCK   = 0x00000002
   302  )
   303  
   304  const MB_ERR_INVALID_CHARS = 8
   305  
   306  //sys	GetACP() (acp uint32) = kernel32.GetACP
   307  //sys	GetConsoleCP() (ccp uint32) = kernel32.GetConsoleCP
   308  //sys	MultiByteToWideChar(codePage uint32, dwFlags uint32, str *byte, nstr int32, wchar *uint16, nwchar int32) (nwrite int32, err error) = kernel32.MultiByteToWideChar
   309  //sys	GetCurrentThread() (pseudoHandle syscall.Handle, err error) = kernel32.GetCurrentThread
   310  
   311  const STYPE_DISKTREE = 0x00
   312  
   313  type SHARE_INFO_2 struct {
   314  	Netname     *uint16
   315  	Type        uint32
   316  	Remark      *uint16
   317  	Permissions uint32
   318  	MaxUses     uint32
   319  	CurrentUses uint32
   320  	Path        *uint16
   321  	Passwd      *uint16
   322  }
   323  
   324  //sys  NetShareAdd(serverName *uint16, level uint32, buf *byte, parmErr *uint16) (neterr error) = netapi32.NetShareAdd
   325  //sys  NetShareDel(serverName *uint16, netName *uint16, reserved uint32) (neterr error) = netapi32.NetShareDel
   326  
   327  const (
   328  	FILE_NAME_NORMALIZED = 0x0
   329  	FILE_NAME_OPENED     = 0x8
   330  
   331  	VOLUME_NAME_DOS  = 0x0
   332  	VOLUME_NAME_GUID = 0x1
   333  	VOLUME_NAME_NONE = 0x4
   334  	VOLUME_NAME_NT   = 0x2
   335  )
   336  
   337  //sys	GetFinalPathNameByHandle(file syscall.Handle, filePath *uint16, filePathSize uint32, flags uint32) (n uint32, err error) = kernel32.GetFinalPathNameByHandleW
   338  
   339  func LoadGetFinalPathNameByHandle() error {
   340  	return procGetFinalPathNameByHandleW.Find()
   341  }
   342  
   343  //sys	CreateEnvironmentBlock(block **uint16, token syscall.Token, inheritExisting bool) (err error) = userenv.CreateEnvironmentBlock
   344  //sys	DestroyEnvironmentBlock(block *uint16) (err error) = userenv.DestroyEnvironmentBlock
   345  
   346  //sys	RtlGenRandom(buf []byte) (err error) = advapi32.SystemFunction036
   347
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