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-rw-r--r--ipc/winpipe/file.go121
-rw-r--r--ipc/winpipe/mksyscall.go9
-rw-r--r--ipc/winpipe/pipe.go509
-rw-r--r--ipc/winpipe/winpipe.go474
-rw-r--r--ipc/winpipe/winpipe_test.go660
-rw-r--r--ipc/winpipe/zsyscall_windows.go238
6 files changed, 1176 insertions, 835 deletions
diff --git a/ipc/winpipe/file.go b/ipc/winpipe/file.go
index f3b768f..0c9abb1 100644
--- a/ipc/winpipe/file.go
+++ b/ipc/winpipe/file.go
@@ -5,54 +5,21 @@
* Copyright (C) 2005 Microsoft
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
+
package winpipe
import (
- "errors"
"io"
+ "os"
"runtime"
"sync"
"sync/atomic"
"time"
+ "unsafe"
"golang.org/x/sys/windows"
)
-//sys cancelIoEx(file windows.Handle, o *windows.Overlapped) (err error) = CancelIoEx
-//sys createIoCompletionPort(file windows.Handle, port windows.Handle, key uintptr, threadCount uint32) (newport windows.Handle, err error) = CreateIoCompletionPort
-//sys getQueuedCompletionStatus(port windows.Handle, bytes *uint32, key *uintptr, o **ioOperation, timeout uint32) (err error) = GetQueuedCompletionStatus
-//sys setFileCompletionNotificationModes(h windows.Handle, flags uint8) (err error) = SetFileCompletionNotificationModes
-//sys wsaGetOverlappedResult(h windows.Handle, o *windows.Overlapped, bytes *uint32, wait bool, flags *uint32) (err error) = ws2_32.WSAGetOverlappedResult
-
-type atomicBool int32
-
-func (b *atomicBool) isSet() bool { return atomic.LoadInt32((*int32)(b)) != 0 }
-func (b *atomicBool) setFalse() { atomic.StoreInt32((*int32)(b), 0) }
-func (b *atomicBool) setTrue() { atomic.StoreInt32((*int32)(b), 1) }
-func (b *atomicBool) swap(new bool) bool {
- var newInt int32
- if new {
- newInt = 1
- }
- return atomic.SwapInt32((*int32)(b), newInt) == 1
-}
-
-const (
- cFILE_SKIP_COMPLETION_PORT_ON_SUCCESS = 1
- cFILE_SKIP_SET_EVENT_ON_HANDLE = 2
-)
-
-var (
- ErrFileClosed = errors.New("file has already been closed")
- ErrTimeout = &timeoutError{}
-)
-
-type timeoutError struct{}
-
-func (e *timeoutError) Error() string { return "i/o timeout" }
-func (e *timeoutError) Timeout() bool { return true }
-func (e *timeoutError) Temporary() bool { return true }
-
type timeoutChan chan struct{}
var ioInitOnce sync.Once
@@ -71,7 +38,7 @@ type ioOperation struct {
}
func initIo() {
- h, err := createIoCompletionPort(windows.InvalidHandle, 0, 0, 0xffffffff)
+ h, err := windows.CreateIoCompletionPort(windows.InvalidHandle, 0, 0, 0)
if err != nil {
panic(err)
}
@@ -79,13 +46,13 @@ func initIo() {
go ioCompletionProcessor(h)
}
-// win32File implements Reader, Writer, and Closer on a Win32 handle without blocking in a syscall.
+// file implements Reader, Writer, and Closer on a Win32 handle without blocking in a syscall.
// It takes ownership of this handle and will close it if it is garbage collected.
-type win32File struct {
+type file struct {
handle windows.Handle
wg sync.WaitGroup
wgLock sync.RWMutex
- closing atomicBool
+ closing uint32 // used as atomic boolean
socket bool
readDeadline deadlineHandler
writeDeadline deadlineHandler
@@ -96,18 +63,18 @@ type deadlineHandler struct {
channel timeoutChan
channelLock sync.RWMutex
timer *time.Timer
- timedout atomicBool
+ timedout uint32 // used as atomic boolean
}
-// makeWin32File makes a new win32File from an existing file handle
-func makeWin32File(h windows.Handle) (*win32File, error) {
- f := &win32File{handle: h}
+// makeFile makes a new file from an existing file handle
+func makeFile(h windows.Handle) (*file, error) {
+ f := &file{handle: h}
ioInitOnce.Do(initIo)
- _, err := createIoCompletionPort(h, ioCompletionPort, 0, 0xffffffff)
+ _, err := windows.CreateIoCompletionPort(h, ioCompletionPort, 0, 0)
if err != nil {
return nil, err
}
- err = setFileCompletionNotificationModes(h, cFILE_SKIP_COMPLETION_PORT_ON_SUCCESS|cFILE_SKIP_SET_EVENT_ON_HANDLE)
+ err = windows.SetFileCompletionNotificationModes(h, windows.FILE_SKIP_COMPLETION_PORT_ON_SUCCESS|windows.FILE_SKIP_SET_EVENT_ON_HANDLE)
if err != nil {
return nil, err
}
@@ -116,18 +83,14 @@ func makeWin32File(h windows.Handle) (*win32File, error) {
return f, nil
}
-func MakeOpenFile(h windows.Handle) (io.ReadWriteCloser, error) {
- return makeWin32File(h)
-}
-
// closeHandle closes the resources associated with a Win32 handle
-func (f *win32File) closeHandle() {
+func (f *file) closeHandle() {
f.wgLock.Lock()
// Atomically set that we are closing, releasing the resources only once.
- if !f.closing.swap(true) {
+ if atomic.SwapUint32(&f.closing, 1) == 0 {
f.wgLock.Unlock()
// cancel all IO and wait for it to complete
- cancelIoEx(f.handle, nil)
+ windows.CancelIoEx(f.handle, nil)
f.wg.Wait()
// at this point, no new IO can start
windows.Close(f.handle)
@@ -137,19 +100,19 @@ func (f *win32File) closeHandle() {
}
}
-// Close closes a win32File.
-func (f *win32File) Close() error {
+// Close closes a file.
+func (f *file) Close() error {
f.closeHandle()
return nil
}
// prepareIo prepares for a new IO operation.
// The caller must call f.wg.Done() when the IO is finished, prior to Close() returning.
-func (f *win32File) prepareIo() (*ioOperation, error) {
+func (f *file) prepareIo() (*ioOperation, error) {
f.wgLock.RLock()
- if f.closing.isSet() {
+ if atomic.LoadUint32(&f.closing) == 1 {
f.wgLock.RUnlock()
- return nil, ErrFileClosed
+ return nil, os.ErrClosed
}
f.wg.Add(1)
f.wgLock.RUnlock()
@@ -164,7 +127,7 @@ func ioCompletionProcessor(h windows.Handle) {
var bytes uint32
var key uintptr
var op *ioOperation
- err := getQueuedCompletionStatus(h, &bytes, &key, &op, windows.INFINITE)
+ err := windows.GetQueuedCompletionStatus(h, &bytes, &key, (**windows.Overlapped)(unsafe.Pointer(&op)), windows.INFINITE)
if op == nil {
panic(err)
}
@@ -174,13 +137,13 @@ func ioCompletionProcessor(h windows.Handle) {
// asyncIo processes the return value from ReadFile or WriteFile, blocking until
// the operation has actually completed.
-func (f *win32File) asyncIo(c *ioOperation, d *deadlineHandler, bytes uint32, err error) (int, error) {
+func (f *file) asyncIo(c *ioOperation, d *deadlineHandler, bytes uint32, err error) (int, error) {
if err != windows.ERROR_IO_PENDING {
return int(bytes), err
}
- if f.closing.isSet() {
- cancelIoEx(f.handle, &c.o)
+ if atomic.LoadUint32(&f.closing) == 1 {
+ windows.CancelIoEx(f.handle, &c.o)
}
var timeout timeoutChan
@@ -195,20 +158,20 @@ func (f *win32File) asyncIo(c *ioOperation, d *deadlineHandler, bytes uint32, er
case r = <-c.ch:
err = r.err
if err == windows.ERROR_OPERATION_ABORTED {
- if f.closing.isSet() {
- err = ErrFileClosed
+ if atomic.LoadUint32(&f.closing) == 1 {
+ err = os.ErrClosed
}
} else if err != nil && f.socket {
// err is from Win32. Query the overlapped structure to get the winsock error.
var bytes, flags uint32
- err = wsaGetOverlappedResult(f.handle, &c.o, &bytes, false, &flags)
+ err = windows.WSAGetOverlappedResult(f.handle, &c.o, &bytes, false, &flags)
}
case <-timeout:
- cancelIoEx(f.handle, &c.o)
+ windows.CancelIoEx(f.handle, &c.o)
r = <-c.ch
err = r.err
if err == windows.ERROR_OPERATION_ABORTED {
- err = ErrTimeout
+ err = os.ErrDeadlineExceeded
}
}
@@ -220,15 +183,15 @@ func (f *win32File) asyncIo(c *ioOperation, d *deadlineHandler, bytes uint32, er
}
// Read reads from a file handle.
-func (f *win32File) Read(b []byte) (int, error) {
+func (f *file) Read(b []byte) (int, error) {
c, err := f.prepareIo()
if err != nil {
return 0, err
}
defer f.wg.Done()
- if f.readDeadline.timedout.isSet() {
- return 0, ErrTimeout
+ if atomic.LoadUint32(&f.readDeadline.timedout) == 1 {
+ return 0, os.ErrDeadlineExceeded
}
var bytes uint32
@@ -247,15 +210,15 @@ func (f *win32File) Read(b []byte) (int, error) {
}
// Write writes to a file handle.
-func (f *win32File) Write(b []byte) (int, error) {
+func (f *file) Write(b []byte) (int, error) {
c, err := f.prepareIo()
if err != nil {
return 0, err
}
defer f.wg.Done()
- if f.writeDeadline.timedout.isSet() {
- return 0, ErrTimeout
+ if atomic.LoadUint32(&f.writeDeadline.timedout) == 1 {
+ return 0, os.ErrDeadlineExceeded
}
var bytes uint32
@@ -265,19 +228,19 @@ func (f *win32File) Write(b []byte) (int, error) {
return n, err
}
-func (f *win32File) SetReadDeadline(deadline time.Time) error {
+func (f *file) SetReadDeadline(deadline time.Time) error {
return f.readDeadline.set(deadline)
}
-func (f *win32File) SetWriteDeadline(deadline time.Time) error {
+func (f *file) SetWriteDeadline(deadline time.Time) error {
return f.writeDeadline.set(deadline)
}
-func (f *win32File) Flush() error {
+func (f *file) Flush() error {
return windows.FlushFileBuffers(f.handle)
}
-func (f *win32File) Fd() uintptr {
+func (f *file) Fd() uintptr {
return uintptr(f.handle)
}
@@ -291,7 +254,7 @@ func (d *deadlineHandler) set(deadline time.Time) error {
}
d.timer = nil
}
- d.timedout.setFalse()
+ atomic.StoreUint32(&d.timedout, 0)
select {
case <-d.channel:
@@ -306,7 +269,7 @@ func (d *deadlineHandler) set(deadline time.Time) error {
}
timeoutIO := func() {
- d.timedout.setTrue()
+ atomic.StoreUint32(&d.timedout, 1)
close(d.channel)
}
diff --git a/ipc/winpipe/mksyscall.go b/ipc/winpipe/mksyscall.go
deleted file mode 100644
index a87e929..0000000
--- a/ipc/winpipe/mksyscall.go
+++ /dev/null
@@ -1,9 +0,0 @@
-/* SPDX-License-Identifier: MIT
- *
- * Copyright (C) 2005 Microsoft
- * Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
- */
-
-package winpipe
-
-//go:generate go run golang.org/x/sys/windows/mkwinsyscall -output zsyscall_windows.go pipe.go file.go
diff --git a/ipc/winpipe/pipe.go b/ipc/winpipe/pipe.go
deleted file mode 100644
index e609274..0000000
--- a/ipc/winpipe/pipe.go
+++ /dev/null
@@ -1,509 +0,0 @@
-// +build windows
-
-/* SPDX-License-Identifier: MIT
- *
- * Copyright (C) 2005 Microsoft
- * Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
- */
-
-package winpipe
-
-import (
- "context"
- "errors"
- "fmt"
- "io"
- "net"
- "os"
- "runtime"
- "time"
- "unsafe"
-
- "golang.org/x/sys/windows"
-)
-
-//sys connectNamedPipe(pipe windows.Handle, o *windows.Overlapped) (err error) = ConnectNamedPipe
-//sys createNamedPipe(name string, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *windows.SecurityAttributes) (handle windows.Handle, err error) [failretval==windows.InvalidHandle] = CreateNamedPipeW
-//sys createFile(name string, access uint32, mode uint32, sa *windows.SecurityAttributes, createmode uint32, attrs uint32, templatefile windows.Handle) (handle windows.Handle, err error) [failretval==windows.InvalidHandle] = CreateFileW
-//sys getNamedPipeInfo(pipe windows.Handle, flags *uint32, outSize *uint32, inSize *uint32, maxInstances *uint32) (err error) = GetNamedPipeInfo
-//sys getNamedPipeHandleState(pipe windows.Handle, state *uint32, curInstances *uint32, maxCollectionCount *uint32, collectDataTimeout *uint32, userName *uint16, maxUserNameSize uint32) (err error) = GetNamedPipeHandleStateW
-//sys localAlloc(uFlags uint32, length uint32) (ptr uintptr) = LocalAlloc
-//sys ntCreateNamedPipeFile(pipe *windows.Handle, access uint32, oa *objectAttributes, iosb *ioStatusBlock, share uint32, disposition uint32, options uint32, typ uint32, readMode uint32, completionMode uint32, maxInstances uint32, inboundQuota uint32, outputQuota uint32, timeout *int64) (status ntstatus) = ntdll.NtCreateNamedPipeFile
-//sys rtlNtStatusToDosError(status ntstatus) (winerr error) = ntdll.RtlNtStatusToDosErrorNoTeb
-//sys rtlDosPathNameToNtPathName(name *uint16, ntName *unicodeString, filePart uintptr, reserved uintptr) (status ntstatus) = ntdll.RtlDosPathNameToNtPathName_U
-//sys rtlDefaultNpAcl(dacl *uintptr) (status ntstatus) = ntdll.RtlDefaultNpAcl
-
-type ioStatusBlock struct {
- Status, Information uintptr
-}
-
-type objectAttributes struct {
- Length uintptr
- RootDirectory uintptr
- ObjectName *unicodeString
- Attributes uintptr
- SecurityDescriptor *windows.SECURITY_DESCRIPTOR
- SecurityQoS uintptr
-}
-
-type unicodeString struct {
- Length uint16
- MaximumLength uint16
- Buffer uintptr
-}
-
-type ntstatus int32
-
-func (status ntstatus) Err() error {
- if status >= 0 {
- return nil
- }
- return rtlNtStatusToDosError(status)
-}
-
-const (
- cSECURITY_SQOS_PRESENT = 0x100000
- cSECURITY_ANONYMOUS = 0
-
- cPIPE_TYPE_MESSAGE = 4
-
- cPIPE_READMODE_MESSAGE = 2
-
- cFILE_OPEN = 1
- cFILE_CREATE = 2
-
- cFILE_PIPE_MESSAGE_TYPE = 1
- cFILE_PIPE_REJECT_REMOTE_CLIENTS = 2
-)
-
-var (
- // ErrPipeListenerClosed is returned for pipe operations on listeners that have been closed.
- // This error should match net.errClosing since docker takes a dependency on its text.
- ErrPipeListenerClosed = errors.New("use of closed network connection")
-
- errPipeWriteClosed = errors.New("pipe has been closed for write")
-)
-
-type win32Pipe struct {
- *win32File
- path string
-}
-
-type win32MessageBytePipe struct {
- win32Pipe
- writeClosed bool
- readEOF bool
-}
-
-type pipeAddress string
-
-func (f *win32Pipe) LocalAddr() net.Addr {
- return pipeAddress(f.path)
-}
-
-func (f *win32Pipe) RemoteAddr() net.Addr {
- return pipeAddress(f.path)
-}
-
-func (f *win32Pipe) SetDeadline(t time.Time) error {
- f.SetReadDeadline(t)
- f.SetWriteDeadline(t)
- return nil
-}
-
-// CloseWrite closes the write side of a message pipe in byte mode.
-func (f *win32MessageBytePipe) CloseWrite() error {
- if f.writeClosed {
- return errPipeWriteClosed
- }
- err := f.win32File.Flush()
- if err != nil {
- return err
- }
- _, err = f.win32File.Write(nil)
- if err != nil {
- return err
- }
- f.writeClosed = true
- return nil
-}
-
-// Write writes bytes to a message pipe in byte mode. Zero-byte writes are ignored, since
-// they are used to implement CloseWrite().
-func (f *win32MessageBytePipe) Write(b []byte) (int, error) {
- if f.writeClosed {
- return 0, errPipeWriteClosed
- }
- if len(b) == 0 {
- return 0, nil
- }
- return f.win32File.Write(b)
-}
-
-// Read reads bytes from a message pipe in byte mode. A read of a zero-byte message on a message
-// mode pipe will return io.EOF, as will all subsequent reads.
-func (f *win32MessageBytePipe) Read(b []byte) (int, error) {
- if f.readEOF {
- return 0, io.EOF
- }
- n, err := f.win32File.Read(b)
- if err == io.EOF {
- // If this was the result of a zero-byte read, then
- // it is possible that the read was due to a zero-size
- // message. Since we are simulating CloseWrite with a
- // zero-byte message, ensure that all future Read() calls
- // also return EOF.
- f.readEOF = true
- } else if err == windows.ERROR_MORE_DATA {
- // ERROR_MORE_DATA indicates that the pipe's read mode is message mode
- // and the message still has more bytes. Treat this as a success, since
- // this package presents all named pipes as byte streams.
- err = nil
- }
- return n, err
-}
-
-func (s pipeAddress) Network() string {
- return "pipe"
-}
-
-func (s pipeAddress) String() string {
- return string(s)
-}
-
-// tryDialPipe attempts to dial the pipe at `path` until `ctx` cancellation or timeout.
-func tryDialPipe(ctx context.Context, path *string) (windows.Handle, error) {
- for {
- select {
- case <-ctx.Done():
- return windows.Handle(0), ctx.Err()
- default:
- h, err := createFile(*path, windows.GENERIC_READ|windows.GENERIC_WRITE, 0, nil, windows.OPEN_EXISTING, windows.FILE_FLAG_OVERLAPPED|cSECURITY_SQOS_PRESENT|cSECURITY_ANONYMOUS, 0)
- if err == nil {
- return h, nil
- }
- if err != windows.ERROR_PIPE_BUSY {
- return h, &os.PathError{Err: err, Op: "open", Path: *path}
- }
- // Wait 10 msec and try again. This is a rather simplistic
- // view, as we always try each 10 milliseconds.
- time.Sleep(time.Millisecond * 10)
- }
- }
-}
-
-// DialPipe connects to a named pipe by path, timing out if the connection
-// takes longer than the specified duration. If timeout is nil, then we use
-// a default timeout of 2 seconds. (We do not use WaitNamedPipe.)
-func DialPipe(path string, timeout *time.Duration, expectedOwner *windows.SID) (net.Conn, error) {
- var absTimeout time.Time
- if timeout != nil {
- absTimeout = time.Now().Add(*timeout)
- } else {
- absTimeout = time.Now().Add(time.Second * 2)
- }
- ctx, _ := context.WithDeadline(context.Background(), absTimeout)
- conn, err := DialPipeContext(ctx, path, expectedOwner)
- if err == context.DeadlineExceeded {
- return nil, ErrTimeout
- }
- return conn, err
-}
-
-// DialPipeContext attempts to connect to a named pipe by `path` until `ctx`
-// cancellation or timeout.
-func DialPipeContext(ctx context.Context, path string, expectedOwner *windows.SID) (net.Conn, error) {
- var err error
- var h windows.Handle
- h, err = tryDialPipe(ctx, &path)
- if err != nil {
- return nil, err
- }
-
- if expectedOwner != nil {
- sd, err := windows.GetSecurityInfo(h, windows.SE_FILE_OBJECT, windows.OWNER_SECURITY_INFORMATION)
- if err != nil {
- windows.Close(h)
- return nil, err
- }
- realOwner, _, err := sd.Owner()
- if err != nil {
- windows.Close(h)
- return nil, err
- }
- if !realOwner.Equals(expectedOwner) {
- windows.Close(h)
- return nil, windows.ERROR_ACCESS_DENIED
- }
- }
-
- var flags uint32
- err = getNamedPipeInfo(h, &flags, nil, nil, nil)
- if err != nil {
- windows.Close(h)
- return nil, err
- }
-
- f, err := makeWin32File(h)
- if err != nil {
- windows.Close(h)
- return nil, err
- }
-
- // If the pipe is in message mode, return a message byte pipe, which
- // supports CloseWrite().
- if flags&cPIPE_TYPE_MESSAGE != 0 {
- return &win32MessageBytePipe{
- win32Pipe: win32Pipe{win32File: f, path: path},
- }, nil
- }
- return &win32Pipe{win32File: f, path: path}, nil
-}
-
-type acceptResponse struct {
- f *win32File
- err error
-}
-
-type win32PipeListener struct {
- firstHandle windows.Handle
- path string
- config PipeConfig
- acceptCh chan (chan acceptResponse)
- closeCh chan int
- doneCh chan int
-}
-
-func makeServerPipeHandle(path string, sd *windows.SECURITY_DESCRIPTOR, c *PipeConfig, first bool) (windows.Handle, error) {
- path16, err := windows.UTF16FromString(path)
- if err != nil {
- return 0, &os.PathError{Op: "open", Path: path, Err: err}
- }
-
- var oa objectAttributes
- oa.Length = unsafe.Sizeof(oa)
-
- var ntPath unicodeString
- if err := rtlDosPathNameToNtPathName(&path16[0], &ntPath, 0, 0).Err(); err != nil {
- return 0, &os.PathError{Op: "open", Path: path, Err: err}
- }
- defer windows.LocalFree(windows.Handle(ntPath.Buffer))
- oa.ObjectName = &ntPath
-
- // The security descriptor is only needed for the first pipe.
- if first {
- if sd != nil {
- oa.SecurityDescriptor = sd
- } else {
- // Construct the default named pipe security descriptor.
- var dacl uintptr
- if err := rtlDefaultNpAcl(&dacl).Err(); err != nil {
- return 0, fmt.Errorf("getting default named pipe ACL: %s", err)
- }
- defer windows.LocalFree(windows.Handle(dacl))
- sd, err := windows.NewSecurityDescriptor()
- if err != nil {
- return 0, fmt.Errorf("creating new security descriptor: %s", err)
- }
- if err = sd.SetDACL((*windows.ACL)(unsafe.Pointer(dacl)), true, false); err != nil {
- return 0, fmt.Errorf("assigning dacl: %s", err)
- }
- sd, err = sd.ToSelfRelative()
- if err != nil {
- return 0, fmt.Errorf("converting to self-relative: %s", err)
- }
- oa.SecurityDescriptor = sd
- }
- }
-
- typ := uint32(cFILE_PIPE_REJECT_REMOTE_CLIENTS)
- if c.MessageMode {
- typ |= cFILE_PIPE_MESSAGE_TYPE
- }
-
- disposition := uint32(cFILE_OPEN)
- access := uint32(windows.GENERIC_READ | windows.GENERIC_WRITE | windows.SYNCHRONIZE)
- if first {
- disposition = cFILE_CREATE
- // By not asking for read or write access, the named pipe file system
- // will put this pipe into an initially disconnected state, blocking
- // client connections until the next call with first == false.
- access = windows.SYNCHRONIZE
- }
-
- timeout := int64(-50 * 10000) // 50ms
-
- var (
- h windows.Handle
- iosb ioStatusBlock
- )
- err = ntCreateNamedPipeFile(&h, access, &oa, &iosb, windows.FILE_SHARE_READ|windows.FILE_SHARE_WRITE, disposition, 0, typ, 0, 0, 0xffffffff, uint32(c.InputBufferSize), uint32(c.OutputBufferSize), &timeout).Err()
- if err != nil {
- return 0, &os.PathError{Op: "open", Path: path, Err: err}
- }
-
- runtime.KeepAlive(ntPath)
- return h, nil
-}
-
-func (l *win32PipeListener) makeServerPipe() (*win32File, error) {
- h, err := makeServerPipeHandle(l.path, nil, &l.config, false)
- if err != nil {
- return nil, err
- }
- f, err := makeWin32File(h)
- if err != nil {
- windows.Close(h)
- return nil, err
- }
- return f, nil
-}
-
-func (l *win32PipeListener) makeConnectedServerPipe() (*win32File, error) {
- p, err := l.makeServerPipe()
- if err != nil {
- return nil, err
- }
-
- // Wait for the client to connect.
- ch := make(chan error)
- go func(p *win32File) {
- ch <- connectPipe(p)
- }(p)
-
- select {
- case err = <-ch:
- if err != nil {
- p.Close()
- p = nil
- }
- case <-l.closeCh:
- // Abort the connect request by closing the handle.
- p.Close()
- p = nil
- err = <-ch
- if err == nil || err == ErrFileClosed {
- err = ErrPipeListenerClosed
- }
- }
- return p, err
-}
-
-func (l *win32PipeListener) listenerRoutine() {
- closed := false
- for !closed {
- select {
- case <-l.closeCh:
- closed = true
- case responseCh := <-l.acceptCh:
- var (
- p *win32File
- err error
- )
- for {
- p, err = l.makeConnectedServerPipe()
- // If the connection was immediately closed by the client, try
- // again.
- if err != windows.ERROR_NO_DATA {
- break
- }
- }
- responseCh <- acceptResponse{p, err}
- closed = err == ErrPipeListenerClosed
- }
- }
- windows.Close(l.firstHandle)
- l.firstHandle = 0
- // Notify Close() and Accept() callers that the handle has been closed.
- close(l.doneCh)
-}
-
-// PipeConfig contain configuration for the pipe listener.
-type PipeConfig struct {
- // SecurityDescriptor contains a Windows security descriptor.
- SecurityDescriptor *windows.SECURITY_DESCRIPTOR
-
- // MessageMode determines whether the pipe is in byte or message mode. In either
- // case the pipe is read in byte mode by default. The only practical difference in
- // this implementation is that CloseWrite() is only supported for message mode pipes;
- // CloseWrite() is implemented as a zero-byte write, but zero-byte writes are only
- // transferred to the reader (and returned as io.EOF in this implementation)
- // when the pipe is in message mode.
- MessageMode bool
-
- // InputBufferSize specifies the size the input buffer, in bytes.
- InputBufferSize int32
-
- // OutputBufferSize specifies the size the input buffer, in bytes.
- OutputBufferSize int32
-}
-
-// ListenPipe creates a listener on a Windows named pipe path, e.g. \\.\pipe\mypipe.
-// The pipe must not already exist.
-func ListenPipe(path string, c *PipeConfig) (net.Listener, error) {
- if c == nil {
- c = &PipeConfig{}
- }
- h, err := makeServerPipeHandle(path, c.SecurityDescriptor, c, true)
- if err != nil {
- return nil, err
- }
- l := &win32PipeListener{
- firstHandle: h,
- path: path,
- config: *c,
- acceptCh: make(chan (chan acceptResponse)),
- closeCh: make(chan int),
- doneCh: make(chan int),
- }
- go l.listenerRoutine()
- return l, nil
-}
-
-func connectPipe(p *win32File) error {
- c, err := p.prepareIo()
- if err != nil {
- return err
- }
- defer p.wg.Done()
-
- err = connectNamedPipe(p.handle, &c.o)
- _, err = p.asyncIo(c, nil, 0, err)
- if err != nil && err != windows.ERROR_PIPE_CONNECTED {
- return err
- }
- return nil
-}
-
-func (l *win32PipeListener) Accept() (net.Conn, error) {
- ch := make(chan acceptResponse)
- select {
- case l.acceptCh <- ch:
- response := <-ch
- err := response.err
- if err != nil {
- return nil, err
- }
- if l.config.MessageMode {
- return &win32MessageBytePipe{
- win32Pipe: win32Pipe{win32File: response.f, path: l.path},
- }, nil
- }
- return &win32Pipe{win32File: response.f, path: l.path}, nil
- case <-l.doneCh:
- return nil, ErrPipeListenerClosed
- }
-}
-
-func (l *win32PipeListener) Close() error {
- select {
- case l.closeCh <- 1:
- <-l.doneCh
- case <-l.doneCh:
- }
- return nil
-}
-
-func (l *win32PipeListener) Addr() net.Addr {
- return pipeAddress(l.path)
-}
diff --git a/ipc/winpipe/winpipe.go b/ipc/winpipe/winpipe.go
new file mode 100644
index 0000000..f02f3d8
--- /dev/null
+++ b/ipc/winpipe/winpipe.go
@@ -0,0 +1,474 @@
+// +build windows
+
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2005 Microsoft
+ * Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
+ */
+
+// Package winpipe implements a net.Conn and net.Listener around Windows named pipes.
+package winpipe
+
+import (
+ "context"
+ "io"
+ "net"
+ "os"
+ "runtime"
+ "time"
+ "unsafe"
+
+ "golang.org/x/sys/windows"
+)
+
+type pipe struct {
+ *file
+ path string
+}
+
+type messageBytePipe struct {
+ pipe
+ writeClosed bool
+ readEOF bool
+}
+
+type pipeAddress string
+
+func (f *pipe) LocalAddr() net.Addr {
+ return pipeAddress(f.path)
+}
+
+func (f *pipe) RemoteAddr() net.Addr {
+ return pipeAddress(f.path)
+}
+
+func (f *pipe) SetDeadline(t time.Time) error {
+ f.SetReadDeadline(t)
+ f.SetWriteDeadline(t)
+ return nil
+}
+
+// CloseWrite closes the write side of a message pipe in byte mode.
+func (f *messageBytePipe) CloseWrite() error {
+ if f.writeClosed {
+ return io.ErrClosedPipe
+ }
+ err := f.file.Flush()
+ if err != nil {
+ return err
+ }
+ _, err = f.file.Write(nil)
+ if err != nil {
+ return err
+ }
+ f.writeClosed = true
+ return nil
+}
+
+// Write writes bytes to a message pipe in byte mode. Zero-byte writes are ignored, since
+// they are used to implement CloseWrite.
+func (f *messageBytePipe) Write(b []byte) (int, error) {
+ if f.writeClosed {
+ return 0, io.ErrClosedPipe
+ }
+ if len(b) == 0 {
+ return 0, nil
+ }
+ return f.file.Write(b)
+}
+
+// Read reads bytes from a message pipe in byte mode. A read of a zero-byte message on a message
+// mode pipe will return io.EOF, as will all subsequent reads.
+func (f *messageBytePipe) Read(b []byte) (int, error) {
+ if f.readEOF {
+ return 0, io.EOF
+ }
+ n, err := f.file.Read(b)
+ if err == io.EOF {
+ // If this was the result of a zero-byte read, then
+ // it is possible that the read was due to a zero-size
+ // message. Since we are simulating CloseWrite with a
+ // zero-byte message, ensure that all future Read calls
+ // also return EOF.
+ f.readEOF = true
+ } else if err == windows.ERROR_MORE_DATA {
+ // ERROR_MORE_DATA indicates that the pipe's read mode is message mode
+ // and the message still has more bytes. Treat this as a success, since
+ // this package presents all named pipes as byte streams.
+ err = nil
+ }
+ return n, err
+}
+
+func (f *pipe) Handle() windows.Handle {
+ return f.handle
+}
+
+func (s pipeAddress) Network() string {
+ return "pipe"
+}
+
+func (s pipeAddress) String() string {
+ return string(s)
+}
+
+// tryDialPipe attempts to dial the specified pipe until cancellation or timeout.
+func tryDialPipe(ctx context.Context, path *string) (windows.Handle, error) {
+ for {
+ select {
+ case <-ctx.Done():
+ return 0, ctx.Err()
+ default:
+ path16, err := windows.UTF16PtrFromString(*path)
+ if err != nil {
+ return 0, err
+ }
+ h, err := windows.CreateFile(path16, windows.GENERIC_READ|windows.GENERIC_WRITE, 0, nil, windows.OPEN_EXISTING, windows.FILE_FLAG_OVERLAPPED|windows.SECURITY_SQOS_PRESENT|windows.SECURITY_ANONYMOUS, 0)
+ if err == nil {
+ return h, nil
+ }
+ if err != windows.ERROR_PIPE_BUSY {
+ return h, &os.PathError{Err: err, Op: "open", Path: *path}
+ }
+ // Wait 10 msec and try again. This is a rather simplistic
+ // view, as we always try each 10 milliseconds.
+ time.Sleep(10 * time.Millisecond)
+ }
+ }
+}
+
+// DialConfig exposes various options for use in Dial and DialContext.
+type DialConfig struct {
+ ExpectedOwner *windows.SID // If non-nil, the pipe is verified to be owned by this SID.
+}
+
+// Dial connects to the specified named pipe by path, timing out if the connection
+// takes longer than the specified duration. If timeout is nil, then we use
+// a default timeout of 2 seconds.
+func Dial(path string, timeout *time.Duration, config *DialConfig) (net.Conn, error) {
+ var absTimeout time.Time
+ if timeout != nil {
+ absTimeout = time.Now().Add(*timeout)
+ } else {
+ absTimeout = time.Now().Add(2 * time.Second)
+ }
+ ctx, _ := context.WithDeadline(context.Background(), absTimeout)
+ conn, err := DialContext(ctx, path, config)
+ if err == context.DeadlineExceeded {
+ return nil, os.ErrDeadlineExceeded
+ }
+ return conn, err
+}
+
+// DialContext attempts to connect to the specified named pipe by path
+// cancellation or timeout.
+func DialContext(ctx context.Context, path string, config *DialConfig) (net.Conn, error) {
+ if config == nil {
+ config = &DialConfig{}
+ }
+ var err error
+ var h windows.Handle
+ h, err = tryDialPipe(ctx, &path)
+ if err != nil {
+ return nil, err
+ }
+
+ if config.ExpectedOwner != nil {
+ sd, err := windows.GetSecurityInfo(h, windows.SE_FILE_OBJECT, windows.OWNER_SECURITY_INFORMATION)
+ if err != nil {
+ windows.Close(h)
+ return nil, err
+ }
+ realOwner, _, err := sd.Owner()
+ if err != nil {
+ windows.Close(h)
+ return nil, err
+ }
+ if !realOwner.Equals(config.ExpectedOwner) {
+ windows.Close(h)
+ return nil, windows.ERROR_ACCESS_DENIED
+ }
+ }
+
+ var flags uint32
+ err = windows.GetNamedPipeInfo(h, &flags, nil, nil, nil)
+ if err != nil {
+ windows.Close(h)
+ return nil, err
+ }
+
+ f, err := makeFile(h)
+ if err != nil {
+ windows.Close(h)
+ return nil, err
+ }
+
+ // If the pipe is in message mode, return a message byte pipe, which
+ // supports CloseWrite.
+ if flags&windows.PIPE_TYPE_MESSAGE != 0 {
+ return &messageBytePipe{
+ pipe: pipe{file: f, path: path},
+ }, nil
+ }
+ return &pipe{file: f, path: path}, nil
+}
+
+type acceptResponse struct {
+ f *file
+ err error
+}
+
+type pipeListener struct {
+ firstHandle windows.Handle
+ path string
+ config ListenConfig
+ acceptCh chan (chan acceptResponse)
+ closeCh chan int
+ doneCh chan int
+}
+
+func makeServerPipeHandle(path string, sd *windows.SECURITY_DESCRIPTOR, c *ListenConfig, first bool) (windows.Handle, error) {
+ path16, err := windows.UTF16PtrFromString(path)
+ if err != nil {
+ return 0, &os.PathError{Op: "open", Path: path, Err: err}
+ }
+
+ var oa windows.OBJECT_ATTRIBUTES
+ oa.Length = uint32(unsafe.Sizeof(oa))
+
+ var ntPath windows.NTUnicodeString
+ if err := windows.RtlDosPathNameToNtPathName(path16, &ntPath, nil, nil); err != nil {
+ if ntstatus, ok := err.(windows.NTStatus); ok {
+ err = ntstatus.Errno()
+ }
+ return 0, &os.PathError{Op: "open", Path: path, Err: err}
+ }
+ defer windows.LocalFree(windows.Handle(unsafe.Pointer(ntPath.Buffer)))
+ oa.ObjectName = &ntPath
+
+ // The security descriptor is only needed for the first pipe.
+ if first {
+ if sd != nil {
+ oa.SecurityDescriptor = sd
+ } else {
+ // Construct the default named pipe security descriptor.
+ var acl *windows.ACL
+ if err := windows.RtlDefaultNpAcl(&acl); err != nil {
+ return 0, err
+ }
+ defer windows.LocalFree(windows.Handle(unsafe.Pointer(acl)))
+ sd, err := windows.NewSecurityDescriptor()
+ if err != nil {
+ return 0, err
+ }
+ if err = sd.SetDACL(acl, true, false); err != nil {
+ return 0, err
+ }
+ oa.SecurityDescriptor = sd
+ }
+ }
+
+ typ := uint32(windows.FILE_PIPE_REJECT_REMOTE_CLIENTS)
+ if c.MessageMode {
+ typ |= windows.FILE_PIPE_MESSAGE_TYPE
+ }
+
+ disposition := uint32(windows.FILE_OPEN)
+ access := uint32(windows.GENERIC_READ | windows.GENERIC_WRITE | windows.SYNCHRONIZE)
+ if first {
+ disposition = windows.FILE_CREATE
+ // By not asking for read or write access, the named pipe file system
+ // will put this pipe into an initially disconnected state, blocking
+ // client connections until the next call with first == false.
+ access = windows.SYNCHRONIZE
+ }
+
+ timeout := int64(-50 * 10000) // 50ms
+
+ var (
+ h windows.Handle
+ iosb windows.IO_STATUS_BLOCK
+ )
+ err = windows.NtCreateNamedPipeFile(&h, access, &oa, &iosb, windows.FILE_SHARE_READ|windows.FILE_SHARE_WRITE, disposition, 0, typ, 0, 0, 0xffffffff, uint32(c.InputBufferSize), uint32(c.OutputBufferSize), &timeout)
+ if err != nil {
+ if ntstatus, ok := err.(windows.NTStatus); ok {
+ err = ntstatus.Errno()
+ }
+ return 0, &os.PathError{Op: "open", Path: path, Err: err}
+ }
+
+ runtime.KeepAlive(ntPath)
+ return h, nil
+}
+
+func (l *pipeListener) makeServerPipe() (*file, error) {
+ h, err := makeServerPipeHandle(l.path, nil, &l.config, false)
+ if err != nil {
+ return nil, err
+ }
+ f, err := makeFile(h)
+ if err != nil {
+ windows.Close(h)
+ return nil, err
+ }
+ return f, nil
+}
+
+func (l *pipeListener) makeConnectedServerPipe() (*file, error) {
+ p, err := l.makeServerPipe()
+ if err != nil {
+ return nil, err
+ }
+
+ // Wait for the client to connect.
+ ch := make(chan error)
+ go func(p *file) {
+ ch <- connectPipe(p)
+ }(p)
+
+ select {
+ case err = <-ch:
+ if err != nil {
+ p.Close()
+ p = nil
+ }
+ case <-l.closeCh:
+ // Abort the connect request by closing the handle.
+ p.Close()
+ p = nil
+ err = <-ch
+ if err == nil || err == os.ErrClosed {
+ err = net.ErrClosed
+ }
+ }
+ return p, err
+}
+
+func (l *pipeListener) listenerRoutine() {
+ closed := false
+ for !closed {
+ select {
+ case <-l.closeCh:
+ closed = true
+ case responseCh := <-l.acceptCh:
+ var (
+ p *file
+ err error
+ )
+ for {
+ p, err = l.makeConnectedServerPipe()
+ // If the connection was immediately closed by the client, try
+ // again.
+ if err != windows.ERROR_NO_DATA {
+ break
+ }
+ }
+ responseCh <- acceptResponse{p, err}
+ closed = err == net.ErrClosed
+ }
+ }
+ windows.Close(l.firstHandle)
+ l.firstHandle = 0
+ // Notify Close and Accept callers that the handle has been closed.
+ close(l.doneCh)
+}
+
+// ListenConfig contains configuration for the pipe listener.
+type ListenConfig struct {
+ // SecurityDescriptor contains a Windows security descriptor. If nil, the default from RtlDefaultNpAcl is used.
+ SecurityDescriptor *windows.SECURITY_DESCRIPTOR
+
+ // MessageMode determines whether the pipe is in byte or message mode. In either
+ // case the pipe is read in byte mode by default. The only practical difference in
+ // this implementation is that CloseWrite is only supported for message mode pipes;
+ // CloseWrite is implemented as a zero-byte write, but zero-byte writes are only
+ // transferred to the reader (and returned as io.EOF in this implementation)
+ // when the pipe is in message mode.
+ MessageMode bool
+
+ // InputBufferSize specifies the initial size of the input buffer, in bytes, which the OS will grow as needed.
+ InputBufferSize int32
+
+ // OutputBufferSize specifies the initial size of the output buffer, in bytes, which the OS will grow as needed.
+ OutputBufferSize int32
+}
+
+// Listen creates a listener on a Windows named pipe path,such as \\.\pipe\mypipe.
+// The pipe must not already exist.
+func Listen(path string, c *ListenConfig) (net.Listener, error) {
+ if c == nil {
+ c = &ListenConfig{}
+ }
+ h, err := makeServerPipeHandle(path, c.SecurityDescriptor, c, true)
+ if err != nil {
+ return nil, err
+ }
+ l := &pipeListener{
+ firstHandle: h,
+ path: path,
+ config: *c,
+ acceptCh: make(chan (chan acceptResponse)),
+ closeCh: make(chan int),
+ doneCh: make(chan int),
+ }
+ // The first connection is swallowed on Windows 7 & 8, so synthesize it.
+ if maj, _, _ := windows.RtlGetNtVersionNumbers(); maj <= 8 {
+ path16, err := windows.UTF16PtrFromString(path)
+ if err == nil {
+ h, err = windows.CreateFile(path16, 0, 0, nil, windows.OPEN_EXISTING, windows.SECURITY_SQOS_PRESENT|windows.SECURITY_ANONYMOUS, 0)
+ if err == nil {
+ windows.CloseHandle(h)
+ }
+ }
+ }
+ go l.listenerRoutine()
+ return l, nil
+}
+
+func connectPipe(p *file) error {
+ c, err := p.prepareIo()
+ if err != nil {
+ return err
+ }
+ defer p.wg.Done()
+
+ err = windows.ConnectNamedPipe(p.handle, &c.o)
+ _, err = p.asyncIo(c, nil, 0, err)
+ if err != nil && err != windows.ERROR_PIPE_CONNECTED {
+ return err
+ }
+ return nil
+}
+
+func (l *pipeListener) Accept() (net.Conn, error) {
+ ch := make(chan acceptResponse)
+ select {
+ case l.acceptCh <- ch:
+ response := <-ch
+ err := response.err
+ if err != nil {
+ return nil, err
+ }
+ if l.config.MessageMode {
+ return &messageBytePipe{
+ pipe: pipe{file: response.f, path: l.path},
+ }, nil
+ }
+ return &pipe{file: response.f, path: l.path}, nil
+ case <-l.doneCh:
+ return nil, net.ErrClosed
+ }
+}
+
+func (l *pipeListener) Close() error {
+ select {
+ case l.closeCh <- 1:
+ <-l.doneCh
+ case <-l.doneCh:
+ }
+ return nil
+}
+
+func (l *pipeListener) Addr() net.Addr {
+ return pipeAddress(l.path)
+}
diff --git a/ipc/winpipe/winpipe_test.go b/ipc/winpipe/winpipe_test.go
new file mode 100644
index 0000000..ee8dc8c
--- /dev/null
+++ b/ipc/winpipe/winpipe_test.go
@@ -0,0 +1,660 @@
+// +build windows
+
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2005 Microsoft
+ * Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
+ */
+
+package winpipe_test
+
+import (
+ "bufio"
+ "bytes"
+ "context"
+ "errors"
+ "io"
+ "net"
+ "os"
+ "sync"
+ "syscall"
+ "testing"
+ "time"
+
+ "golang.org/x/sys/windows"
+ "golang.zx2c4.com/wireguard/ipc/winpipe"
+)
+
+func randomPipePath() string {
+ guid, err := windows.GenerateGUID()
+ if err != nil {
+ panic(err)
+ }
+ return `\\.\PIPE\go-winpipe-test-` + guid.String()
+}
+
+func TestPingPong(t *testing.T) {
+ const (
+ ping = 42
+ pong = 24
+ )
+ pipePath := randomPipePath()
+ listener, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Fatalf("unable to listen on pipe: %v", err)
+ }
+ defer listener.Close()
+ go func() {
+ incoming, err := listener.Accept()
+ if err != nil {
+ t.Fatalf("unable to accept pipe connection: %v", err)
+ }
+ defer incoming.Close()
+ var data [1]byte
+ _, err = incoming.Read(data[:])
+ if err != nil {
+ t.Fatalf("unable to read ping from pipe: %v", err)
+ }
+ if data[0] != ping {
+ t.Fatalf("expected ping, got %d", data[0])
+ }
+ data[0] = pong
+ _, err = incoming.Write(data[:])
+ if err != nil {
+ t.Fatalf("unable to write pong to pipe: %v", err)
+ }
+ }()
+ client, err := winpipe.Dial(pipePath, nil, nil)
+ if err != nil {
+ t.Fatalf("unable to dial pipe: %v", err)
+ }
+ defer client.Close()
+ var data [1]byte
+ data[0] = ping
+ _, err = client.Write(data[:])
+ if err != nil {
+ t.Fatalf("unable to write ping to pipe: %v", err)
+ }
+ _, err = client.Read(data[:])
+ if err != nil {
+ t.Fatalf("unable to read pong from pipe: %v", err)
+ }
+ if data[0] != pong {
+ t.Fatalf("expected pong, got %d", data[0])
+ }
+}
+
+func TestDialUnknownFailsImmediately(t *testing.T) {
+ _, err := winpipe.Dial(randomPipePath(), nil, nil)
+ if !errors.Is(err, syscall.ENOENT) {
+ t.Fatalf("expected ENOENT got %v", err)
+ }
+}
+
+func TestDialListenerTimesOut(t *testing.T) {
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer l.Close()
+ d := 10 * time.Millisecond
+ _, err = winpipe.Dial(pipePath, &d, nil)
+ if err != os.ErrDeadlineExceeded {
+ t.Fatalf("expected os.ErrDeadlineExceeded, got %v", err)
+ }
+}
+
+func TestDialContextListenerTimesOut(t *testing.T) {
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer l.Close()
+ d := 10 * time.Millisecond
+ ctx, _ := context.WithTimeout(context.Background(), d)
+ _, err = winpipe.DialContext(ctx, pipePath, nil)
+ if err != context.DeadlineExceeded {
+ t.Fatalf("expected context.DeadlineExceeded, got %v", err)
+ }
+}
+
+func TestDialListenerGetsCancelled(t *testing.T) {
+ pipePath := randomPipePath()
+ ctx, cancel := context.WithCancel(context.Background())
+ l, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ ch := make(chan error)
+ defer l.Close()
+ go func(ctx context.Context, ch chan error) {
+ _, err := winpipe.DialContext(ctx, pipePath, nil)
+ ch <- err
+ }(ctx, ch)
+ time.Sleep(time.Millisecond * 30)
+ cancel()
+ err = <-ch
+ if err != context.Canceled {
+ t.Fatalf("expected context.Canceled, got %v", err)
+ }
+}
+
+func TestDialAccessDeniedWithRestrictedSD(t *testing.T) {
+ if windows.NewLazySystemDLL("ntdll.dll").NewProc("wine_get_version").Find() == nil {
+ t.Skip("dacls on named pipes are broken on wine")
+ }
+ pipePath := randomPipePath()
+ sd, _ := windows.SecurityDescriptorFromString("D:")
+ c := winpipe.ListenConfig{
+ SecurityDescriptor: sd,
+ }
+ l, err := winpipe.Listen(pipePath, &c)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer l.Close()
+ _, err = winpipe.Dial(pipePath, nil, nil)
+ if !errors.Is(err, windows.ERROR_ACCESS_DENIED) {
+ t.Fatalf("expected ERROR_ACCESS_DENIED, got %v", err)
+ }
+}
+
+func getConnection(cfg *winpipe.ListenConfig) (client net.Conn, server net.Conn, err error) {
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, cfg)
+ if err != nil {
+ return
+ }
+ defer l.Close()
+
+ type response struct {
+ c net.Conn
+ err error
+ }
+ ch := make(chan response)
+ go func() {
+ c, err := l.Accept()
+ ch <- response{c, err}
+ }()
+
+ c, err := winpipe.Dial(pipePath, nil, nil)
+ if err != nil {
+ return
+ }
+
+ r := <-ch
+ if err = r.err; err != nil {
+ c.Close()
+ return
+ }
+
+ client = c
+ server = r.c
+ return
+}
+
+func TestReadTimeout(t *testing.T) {
+ c, s, err := getConnection(nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c.Close()
+ defer s.Close()
+
+ c.SetReadDeadline(time.Now().Add(10 * time.Millisecond))
+
+ buf := make([]byte, 10)
+ _, err = c.Read(buf)
+ if err != os.ErrDeadlineExceeded {
+ t.Fatalf("expected os.ErrDeadlineExceeded, got %v", err)
+ }
+}
+
+func server(l net.Listener, ch chan int) {
+ c, err := l.Accept()
+ if err != nil {
+ panic(err)
+ }
+ rw := bufio.NewReadWriter(bufio.NewReader(c), bufio.NewWriter(c))
+ s, err := rw.ReadString('\n')
+ if err != nil {
+ panic(err)
+ }
+ _, err = rw.WriteString("got " + s)
+ if err != nil {
+ panic(err)
+ }
+ err = rw.Flush()
+ if err != nil {
+ panic(err)
+ }
+ c.Close()
+ ch <- 1
+}
+
+func TestFullListenDialReadWrite(t *testing.T) {
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer l.Close()
+
+ ch := make(chan int)
+ go server(l, ch)
+
+ c, err := winpipe.Dial(pipePath, nil, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c.Close()
+
+ rw := bufio.NewReadWriter(bufio.NewReader(c), bufio.NewWriter(c))
+ _, err = rw.WriteString("hello world\n")
+ if err != nil {
+ t.Fatal(err)
+ }
+ err = rw.Flush()
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ s, err := rw.ReadString('\n')
+ if err != nil {
+ t.Fatal(err)
+ }
+ ms := "got hello world\n"
+ if s != ms {
+ t.Errorf("expected '%s', got '%s'", ms, s)
+ }
+
+ <-ch
+}
+
+func TestCloseAbortsListen(t *testing.T) {
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ ch := make(chan error)
+ go func() {
+ _, err := l.Accept()
+ ch <- err
+ }()
+
+ time.Sleep(30 * time.Millisecond)
+ l.Close()
+
+ err = <-ch
+ if err != net.ErrClosed {
+ t.Fatalf("expected net.ErrClosed, got %v", err)
+ }
+}
+
+func ensureEOFOnClose(t *testing.T, r io.Reader, w io.Closer) {
+ b := make([]byte, 10)
+ w.Close()
+ n, err := r.Read(b)
+ if n > 0 {
+ t.Errorf("unexpected byte count %d", n)
+ }
+ if err != io.EOF {
+ t.Errorf("expected EOF: %v", err)
+ }
+}
+
+func TestCloseClientEOFServer(t *testing.T) {
+ c, s, err := getConnection(nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c.Close()
+ defer s.Close()
+ ensureEOFOnClose(t, c, s)
+}
+
+func TestCloseServerEOFClient(t *testing.T) {
+ c, s, err := getConnection(nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c.Close()
+ defer s.Close()
+ ensureEOFOnClose(t, s, c)
+}
+
+func TestCloseWriteEOF(t *testing.T) {
+ cfg := &winpipe.ListenConfig{
+ MessageMode: true,
+ }
+ c, s, err := getConnection(cfg)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c.Close()
+ defer s.Close()
+
+ type closeWriter interface {
+ CloseWrite() error
+ }
+
+ err = c.(closeWriter).CloseWrite()
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ b := make([]byte, 10)
+ _, err = s.Read(b)
+ if err != io.EOF {
+ t.Fatal(err)
+ }
+}
+
+func TestAcceptAfterCloseFails(t *testing.T) {
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ l.Close()
+ _, err = l.Accept()
+ if err != net.ErrClosed {
+ t.Fatalf("expected net.ErrClosed, got %v", err)
+ }
+}
+
+func TestDialTimesOutByDefault(t *testing.T) {
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer l.Close()
+ _, err = winpipe.Dial(pipePath, nil, nil)
+ if err != os.ErrDeadlineExceeded {
+ t.Fatalf("expected os.ErrDeadlineExceeded, got %v", err)
+ }
+}
+
+func TestTimeoutPendingRead(t *testing.T) {
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer l.Close()
+
+ serverDone := make(chan struct{})
+
+ go func() {
+ s, err := l.Accept()
+ if err != nil {
+ t.Fatal(err)
+ }
+ time.Sleep(1 * time.Second)
+ s.Close()
+ close(serverDone)
+ }()
+
+ client, err := winpipe.Dial(pipePath, nil, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer client.Close()
+
+ clientErr := make(chan error)
+ go func() {
+ buf := make([]byte, 10)
+ _, err = client.Read(buf)
+ clientErr <- err
+ }()
+
+ time.Sleep(100 * time.Millisecond) // make *sure* the pipe is reading before we set the deadline
+ client.SetReadDeadline(time.Unix(1, 0))
+
+ select {
+ case err = <-clientErr:
+ if err != os.ErrDeadlineExceeded {
+ t.Fatalf("expected os.ErrDeadlineExceeded, got %v", err)
+ }
+ case <-time.After(100 * time.Millisecond):
+ t.Fatalf("timed out while waiting for read to cancel")
+ <-clientErr
+ }
+ <-serverDone
+}
+
+func TestTimeoutPendingWrite(t *testing.T) {
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer l.Close()
+
+ serverDone := make(chan struct{})
+
+ go func() {
+ s, err := l.Accept()
+ if err != nil {
+ t.Fatal(err)
+ }
+ time.Sleep(1 * time.Second)
+ s.Close()
+ close(serverDone)
+ }()
+
+ client, err := winpipe.Dial(pipePath, nil, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer client.Close()
+
+ clientErr := make(chan error)
+ go func() {
+ _, err = client.Write([]byte("this should timeout"))
+ clientErr <- err
+ }()
+
+ time.Sleep(100 * time.Millisecond) // make *sure* the pipe is writing before we set the deadline
+ client.SetWriteDeadline(time.Unix(1, 0))
+
+ select {
+ case err = <-clientErr:
+ if err != os.ErrDeadlineExceeded {
+ t.Fatalf("expected os.ErrDeadlineExceeded, got %v", err)
+ }
+ case <-time.After(100 * time.Millisecond):
+ t.Fatalf("timed out while waiting for write to cancel")
+ <-clientErr
+ }
+ <-serverDone
+}
+
+type CloseWriter interface {
+ CloseWrite() error
+}
+
+func TestEchoWithMessaging(t *testing.T) {
+ c := winpipe.ListenConfig{
+ MessageMode: true, // Use message mode so that CloseWrite() is supported
+ InputBufferSize: 65536, // Use 64KB buffers to improve performance
+ OutputBufferSize: 65536,
+ }
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, &c)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer l.Close()
+
+ listenerDone := make(chan bool)
+ clientDone := make(chan bool)
+ go func() {
+ // server echo
+ conn, e := l.Accept()
+ if e != nil {
+ t.Fatal(e)
+ }
+ defer conn.Close()
+
+ time.Sleep(500 * time.Millisecond) // make *sure* we don't begin to read before eof signal is sent
+ io.Copy(conn, conn)
+ conn.(CloseWriter).CloseWrite()
+ close(listenerDone)
+ }()
+ timeout := 1 * time.Second
+ client, err := winpipe.Dial(pipePath, &timeout, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer client.Close()
+
+ go func() {
+ // client read back
+ bytes := make([]byte, 2)
+ n, e := client.Read(bytes)
+ if e != nil {
+ t.Fatal(e)
+ }
+ if n != 2 {
+ t.Fatalf("expected 2 bytes, got %v", n)
+ }
+ close(clientDone)
+ }()
+
+ payload := make([]byte, 2)
+ payload[0] = 0
+ payload[1] = 1
+
+ n, err := client.Write(payload)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if n != 2 {
+ t.Fatalf("expected 2 bytes, got %v", n)
+ }
+ client.(CloseWriter).CloseWrite()
+ <-listenerDone
+ <-clientDone
+}
+
+func TestConnectRace(t *testing.T) {
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer l.Close()
+ go func() {
+ for {
+ s, err := l.Accept()
+ if err == net.ErrClosed {
+ return
+ }
+
+ if err != nil {
+ t.Fatal(err)
+ }
+ s.Close()
+ }
+ }()
+
+ for i := 0; i < 1000; i++ {
+ c, err := winpipe.Dial(pipePath, nil, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ c.Close()
+ }
+}
+
+func TestMessageReadMode(t *testing.T) {
+ if maj, _, _ := windows.RtlGetNtVersionNumbers(); maj <= 8 {
+ t.Skipf("Skipping on Windows %d", maj)
+ }
+ var wg sync.WaitGroup
+ defer wg.Wait()
+ pipePath := randomPipePath()
+ l, err := winpipe.Listen(pipePath, &winpipe.ListenConfig{MessageMode: true})
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer l.Close()
+
+ msg := ([]byte)("hello world")
+
+ wg.Add(1)
+ go func() {
+ defer wg.Done()
+ s, err := l.Accept()
+ if err != nil {
+ t.Fatal(err)
+ }
+ _, err = s.Write(msg)
+ if err != nil {
+ t.Fatal(err)
+ }
+ s.Close()
+ }()
+
+ c, err := winpipe.Dial(pipePath, nil, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c.Close()
+
+ mode := uint32(windows.PIPE_READMODE_MESSAGE)
+ err = windows.SetNamedPipeHandleState(c.(interface{ Handle() windows.Handle }).Handle(), &mode, nil, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ ch := make([]byte, 1)
+ var vmsg []byte
+ for {
+ n, err := c.Read(ch)
+ if err == io.EOF {
+ break
+ }
+ if err != nil {
+ t.Fatal(err)
+ }
+ if n != 1 {
+ t.Fatalf("expected 1, got %d", n)
+ }
+ vmsg = append(vmsg, ch[0])
+ }
+ if !bytes.Equal(msg, vmsg) {
+ t.Fatalf("expected %s, got %s", msg, vmsg)
+ }
+}
+
+func TestListenConnectRace(t *testing.T) {
+ if testing.Short() {
+ t.Skip("Skipping long race test")
+ }
+ pipePath := randomPipePath()
+ for i := 0; i < 50 && !t.Failed(); i++ {
+ var wg sync.WaitGroup
+ wg.Add(1)
+ go func() {
+ c, err := winpipe.Dial(pipePath, nil, nil)
+ if err == nil {
+ c.Close()
+ }
+ wg.Done()
+ }()
+ s, err := winpipe.Listen(pipePath, nil)
+ if err != nil {
+ t.Error(i, err)
+ } else {
+ s.Close()
+ }
+ wg.Wait()
+ }
+}
diff --git a/ipc/winpipe/zsyscall_windows.go b/ipc/winpipe/zsyscall_windows.go
deleted file mode 100644
index 9954329..0000000
--- a/ipc/winpipe/zsyscall_windows.go
+++ /dev/null
@@ -1,238 +0,0 @@
-// Code generated by 'go generate'; DO NOT EDIT.
-
-package winpipe
-
-import (
- "syscall"
- "unsafe"
-
- "golang.org/x/sys/windows"
-)
-
-var _ unsafe.Pointer
-
-// Do the interface allocations only once for common
-// Errno values.
-const (
- errnoERROR_IO_PENDING = 997
-)
-
-var (
- errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
-)
-
-// errnoErr returns common boxed Errno values, to prevent
-// allocations at runtime.
-func errnoErr(e syscall.Errno) error {
- switch e {
- case 0:
- return nil
- case errnoERROR_IO_PENDING:
- return errERROR_IO_PENDING
- }
- // TODO: add more here, after collecting data on the common
- // error values see on Windows. (perhaps when running
- // all.bat?)
- return e
-}
-
-var (
- modkernel32 = windows.NewLazySystemDLL("kernel32.dll")
- modntdll = windows.NewLazySystemDLL("ntdll.dll")
- modws2_32 = windows.NewLazySystemDLL("ws2_32.dll")
-
- procConnectNamedPipe = modkernel32.NewProc("ConnectNamedPipe")
- procCreateNamedPipeW = modkernel32.NewProc("CreateNamedPipeW")
- procCreateFileW = modkernel32.NewProc("CreateFileW")
- procGetNamedPipeInfo = modkernel32.NewProc("GetNamedPipeInfo")
- procGetNamedPipeHandleStateW = modkernel32.NewProc("GetNamedPipeHandleStateW")
- procLocalAlloc = modkernel32.NewProc("LocalAlloc")
- procNtCreateNamedPipeFile = modntdll.NewProc("NtCreateNamedPipeFile")
- procRtlNtStatusToDosErrorNoTeb = modntdll.NewProc("RtlNtStatusToDosErrorNoTeb")
- procRtlDosPathNameToNtPathName_U = modntdll.NewProc("RtlDosPathNameToNtPathName_U")
- procRtlDefaultNpAcl = modntdll.NewProc("RtlDefaultNpAcl")
- procCancelIoEx = modkernel32.NewProc("CancelIoEx")
- procCreateIoCompletionPort = modkernel32.NewProc("CreateIoCompletionPort")
- procGetQueuedCompletionStatus = modkernel32.NewProc("GetQueuedCompletionStatus")
- procSetFileCompletionNotificationModes = modkernel32.NewProc("SetFileCompletionNotificationModes")
- procWSAGetOverlappedResult = modws2_32.NewProc("WSAGetOverlappedResult")
-)
-
-func connectNamedPipe(pipe windows.Handle, o *windows.Overlapped) (err error) {
- r1, _, e1 := syscall.Syscall(procConnectNamedPipe.Addr(), 2, uintptr(pipe), uintptr(unsafe.Pointer(o)), 0)
- if r1 == 0 {
- if e1 != 0 {
- err = errnoErr(e1)
- } else {
- err = syscall.EINVAL
- }
- }
- return
-}
-
-func createNamedPipe(name string, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *windows.SecurityAttributes) (handle windows.Handle, err error) {
- var _p0 *uint16
- _p0, err = syscall.UTF16PtrFromString(name)
- if err != nil {
- return
- }
- return _createNamedPipe(_p0, flags, pipeMode, maxInstances, outSize, inSize, defaultTimeout, sa)
-}
-
-func _createNamedPipe(name *uint16, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *windows.SecurityAttributes) (handle windows.Handle, err error) {
- r0, _, e1 := syscall.Syscall9(procCreateNamedPipeW.Addr(), 8, uintptr(unsafe.Pointer(name)), uintptr(flags), uintptr(pipeMode), uintptr(maxInstances), uintptr(outSize), uintptr(inSize), uintptr(defaultTimeout), uintptr(unsafe.Pointer(sa)), 0)
- handle = windows.Handle(r0)
- if handle == windows.InvalidHandle {
- if e1 != 0 {
- err = errnoErr(e1)
- } else {
- err = syscall.EINVAL
- }
- }
- return
-}
-
-func createFile(name string, access uint32, mode uint32, sa *windows.SecurityAttributes, createmode uint32, attrs uint32, templatefile windows.Handle) (handle windows.Handle, err error) {
- var _p0 *uint16
- _p0, err = syscall.UTF16PtrFromString(name)
- if err != nil {
- return
- }
- return _createFile(_p0, access, mode, sa, createmode, attrs, templatefile)
-}
-
-func _createFile(name *uint16, access uint32, mode uint32, sa *windows.SecurityAttributes, createmode uint32, attrs uint32, templatefile windows.Handle) (handle windows.Handle, err error) {
- r0, _, e1 := syscall.Syscall9(procCreateFileW.Addr(), 7, uintptr(unsafe.Pointer(name)), uintptr(access), uintptr(mode), uintptr(unsafe.Pointer(sa)), uintptr(createmode), uintptr(attrs), uintptr(templatefile), 0, 0)
- handle = windows.Handle(r0)
- if handle == windows.InvalidHandle {
- if e1 != 0 {
- err = errnoErr(e1)
- } else {
- err = syscall.EINVAL
- }
- }
- return
-}
-
-func getNamedPipeInfo(pipe windows.Handle, flags *uint32, outSize *uint32, inSize *uint32, maxInstances *uint32) (err error) {
- r1, _, e1 := syscall.Syscall6(procGetNamedPipeInfo.Addr(), 5, uintptr(pipe), uintptr(unsafe.Pointer(flags)), uintptr(unsafe.Pointer(outSize)), uintptr(unsafe.Pointer(inSize)), uintptr(unsafe.Pointer(maxInstances)), 0)
- if r1 == 0 {
- if e1 != 0 {
- err = errnoErr(e1)
- } else {
- err = syscall.EINVAL
- }
- }
- return
-}
-
-func getNamedPipeHandleState(pipe windows.Handle, state *uint32, curInstances *uint32, maxCollectionCount *uint32, collectDataTimeout *uint32, userName *uint16, maxUserNameSize uint32) (err error) {
- r1, _, e1 := syscall.Syscall9(procGetNamedPipeHandleStateW.Addr(), 7, uintptr(pipe), uintptr(unsafe.Pointer(state)), uintptr(unsafe.Pointer(curInstances)), uintptr(unsafe.Pointer(maxCollectionCount)), uintptr(unsafe.Pointer(collectDataTimeout)), uintptr(unsafe.Pointer(userName)), uintptr(maxUserNameSize), 0, 0)
- if r1 == 0 {
- if e1 != 0 {
- err = errnoErr(e1)
- } else {
- err = syscall.EINVAL
- }
- }
- return
-}
-
-func localAlloc(uFlags uint32, length uint32) (ptr uintptr) {
- r0, _, _ := syscall.Syscall(procLocalAlloc.Addr(), 2, uintptr(uFlags), uintptr(length), 0)
- ptr = uintptr(r0)
- return
-}
-
-func ntCreateNamedPipeFile(pipe *windows.Handle, access uint32, oa *objectAttributes, iosb *ioStatusBlock, share uint32, disposition uint32, options uint32, typ uint32, readMode uint32, completionMode uint32, maxInstances uint32, inboundQuota uint32, outputQuota uint32, timeout *int64) (status ntstatus) {
- r0, _, _ := syscall.Syscall15(procNtCreateNamedPipeFile.Addr(), 14, uintptr(unsafe.Pointer(pipe)), uintptr(access), uintptr(unsafe.Pointer(oa)), uintptr(unsafe.Pointer(iosb)), uintptr(share), uintptr(disposition), uintptr(options), uintptr(typ), uintptr(readMode), uintptr(completionMode), uintptr(maxInstances), uintptr(inboundQuota), uintptr(outputQuota), uintptr(unsafe.Pointer(timeout)), 0)
- status = ntstatus(r0)
- return
-}
-
-func rtlNtStatusToDosError(status ntstatus) (winerr error) {
- r0, _, _ := syscall.Syscall(procRtlNtStatusToDosErrorNoTeb.Addr(), 1, uintptr(status), 0, 0)
- if r0 != 0 {
- winerr = syscall.Errno(r0)
- }
- return
-}
-
-func rtlDosPathNameToNtPathName(name *uint16, ntName *unicodeString, filePart uintptr, reserved uintptr) (status ntstatus) {
- r0, _, _ := syscall.Syscall6(procRtlDosPathNameToNtPathName_U.Addr(), 4, uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(ntName)), uintptr(filePart), uintptr(reserved), 0, 0)
- status = ntstatus(r0)
- return
-}
-
-func rtlDefaultNpAcl(dacl *uintptr) (status ntstatus) {
- r0, _, _ := syscall.Syscall(procRtlDefaultNpAcl.Addr(), 1, uintptr(unsafe.Pointer(dacl)), 0, 0)
- status = ntstatus(r0)
- return
-}
-
-func cancelIoEx(file windows.Handle, o *windows.Overlapped) (err error) {
- r1, _, e1 := syscall.Syscall(procCancelIoEx.Addr(), 2, uintptr(file), uintptr(unsafe.Pointer(o)), 0)
- if r1 == 0 {
- if e1 != 0 {
- err = errnoErr(e1)
- } else {
- err = syscall.EINVAL
- }
- }
- return
-}
-
-func createIoCompletionPort(file windows.Handle, port windows.Handle, key uintptr, threadCount uint32) (newport windows.Handle, err error) {
- r0, _, e1 := syscall.Syscall6(procCreateIoCompletionPort.Addr(), 4, uintptr(file), uintptr(port), uintptr(key), uintptr(threadCount), 0, 0)
- newport = windows.Handle(r0)
- if newport == 0 {
- if e1 != 0 {
- err = errnoErr(e1)
- } else {
- err = syscall.EINVAL
- }
- }
- return
-}
-
-func getQueuedCompletionStatus(port windows.Handle, bytes *uint32, key *uintptr, o **ioOperation, timeout uint32) (err error) {
- r1, _, e1 := syscall.Syscall6(procGetQueuedCompletionStatus.Addr(), 5, uintptr(port), uintptr(unsafe.Pointer(bytes)), uintptr(unsafe.Pointer(key)), uintptr(unsafe.Pointer(o)), uintptr(timeout), 0)
- if r1 == 0 {
- if e1 != 0 {
- err = errnoErr(e1)
- } else {
- err = syscall.EINVAL
- }
- }
- return
-}
-
-func setFileCompletionNotificationModes(h windows.Handle, flags uint8) (err error) {
- r1, _, e1 := syscall.Syscall(procSetFileCompletionNotificationModes.Addr(), 2, uintptr(h), uintptr(flags), 0)
- if r1 == 0 {
- if e1 != 0 {
- err = errnoErr(e1)
- } else {
- err = syscall.EINVAL
- }
- }
- return
-}
-
-func wsaGetOverlappedResult(h windows.Handle, o *windows.Overlapped, bytes *uint32, wait bool, flags *uint32) (err error) {
- var _p0 uint32
- if wait {
- _p0 = 1
- } else {
- _p0 = 0
- }
- r1, _, e1 := syscall.Syscall6(procWSAGetOverlappedResult.Addr(), 5, uintptr(h), uintptr(unsafe.Pointer(o)), uintptr(unsafe.Pointer(bytes)), uintptr(_p0), uintptr(unsafe.Pointer(flags)), 0)
- if r1 == 0 {
- if e1 != 0 {
- err = errnoErr(e1)
- } else {
- err = syscall.EINVAL
- }
- }
- return
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 13:45:22 +0000