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Diffstat (limited to 'Godeps/_workspace/src/github.com/microsoft/go-winio/pipe.go')
-rw-r--r--Godeps/_workspace/src/github.com/microsoft/go-winio/pipe.go398
1 files changed, 0 insertions, 398 deletions
diff --git a/Godeps/_workspace/src/github.com/microsoft/go-winio/pipe.go b/Godeps/_workspace/src/github.com/microsoft/go-winio/pipe.go
deleted file mode 100644
index 82db28306..000000000
--- a/Godeps/_workspace/src/github.com/microsoft/go-winio/pipe.go
+++ /dev/null
@@ -1,398 +0,0 @@
-package winio
-
-import (
- "errors"
- "io"
- "net"
- "os"
- "syscall"
- "time"
- "unsafe"
-)
-
-//sys connectNamedPipe(pipe syscall.Handle, o *syscall.Overlapped) (err error) = ConnectNamedPipe
-//sys createNamedPipe(name string, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *securityAttributes) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = CreateNamedPipeW
-//sys createFile(name string, access uint32, mode uint32, sa *securityAttributes, createmode uint32, attrs uint32, templatefile syscall.Handle) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = CreateFileW
-//sys waitNamedPipe(name string, timeout uint32) (err error) = WaitNamedPipeW
-//sys getNamedPipeInfo(pipe syscall.Handle, flags *uint32, outSize *uint32, inSize *uint32, maxInstances *uint32) (err error) = GetNamedPipeInfo
-//sys getNamedPipeHandleState(pipe syscall.Handle, state *uint32, curInstances *uint32, maxCollectionCount *uint32, collectDataTimeout *uint32, userName *uint16, maxUserNameSize uint32) (err error) = GetNamedPipeHandleStateW
-
-type securityAttributes struct {
- Length uint32
- SecurityDescriptor *byte
- InheritHandle uint32
-}
-
-const (
- cERROR_PIPE_BUSY = syscall.Errno(231)
- cERROR_PIPE_CONNECTED = syscall.Errno(535)
- cERROR_SEM_TIMEOUT = syscall.Errno(121)
-
- cPIPE_ACCESS_DUPLEX = 0x3
- cFILE_FLAG_FIRST_PIPE_INSTANCE = 0x80000
- cSECURITY_SQOS_PRESENT = 0x100000
- cSECURITY_ANONYMOUS = 0
-
- cPIPE_REJECT_REMOTE_CLIENTS = 0x8
-
- cPIPE_UNLIMITED_INSTANCES = 255
-
- cNMPWAIT_USE_DEFAULT_WAIT = 0
- cNMPWAIT_NOWAIT = 1
-
- cPIPE_TYPE_MESSAGE = 4
-
- cPIPE_READMODE_MESSAGE = 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.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
- }
- return n, err
-}
-
-func (s pipeAddress) Network() string {
- return "pipe"
-}
-
-func (s pipeAddress) String() string {
- return string(s)
-}
-
-// DialPipe connects to a named pipe by path, timing out if the connection
-// takes longer than the specified duration. If timeout is nil, then the timeout
-// is the default timeout established by the pipe server.
-func DialPipe(path string, timeout *time.Duration) (net.Conn, error) {
- var absTimeout time.Time
- if timeout != nil {
- absTimeout = time.Now().Add(*timeout)
- }
- var err error
- var h syscall.Handle
- for {
- h, err = createFile(path, syscall.GENERIC_READ|syscall.GENERIC_WRITE, 0, nil, syscall.OPEN_EXISTING, syscall.FILE_FLAG_OVERLAPPED|cSECURITY_SQOS_PRESENT|cSECURITY_ANONYMOUS, 0)
- if err != cERROR_PIPE_BUSY {
- break
- }
- now := time.Now()
- var ms uint32
- if absTimeout.IsZero() {
- ms = cNMPWAIT_USE_DEFAULT_WAIT
- } else if now.After(absTimeout) {
- ms = cNMPWAIT_NOWAIT
- } else {
- ms = uint32(absTimeout.Sub(now).Nanoseconds() / 1000 / 1000)
- }
- err = waitNamedPipe(path, ms)
- if err != nil {
- if err == cERROR_SEM_TIMEOUT {
- return nil, ErrTimeout
- }
- break
- }
- }
- if err != nil {
- return nil, &os.PathError{Op: "open", Path: path, Err: err}
- }
-
- var flags uint32
- err = getNamedPipeInfo(h, &flags, nil, nil, nil)
- if err != nil {
- return nil, err
- }
-
- var state uint32
- err = getNamedPipeHandleState(h, &state, nil, nil, nil, nil, 0)
- if err != nil {
- return nil, err
- }
-
- if state&cPIPE_READMODE_MESSAGE != 0 {
- return nil, &os.PathError{Op: "open", Path: path, Err: errors.New("message readmode pipes not supported")}
- }
-
- f, err := makeWin32File(h)
- if err != nil {
- syscall.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 syscall.Handle
- path string
- securityDescriptor []byte
- config PipeConfig
- acceptCh chan (chan acceptResponse)
- closeCh chan int
- doneCh chan int
-}
-
-func makeServerPipeHandle(path string, securityDescriptor []byte, c *PipeConfig, first bool) (syscall.Handle, error) {
- var flags uint32 = cPIPE_ACCESS_DUPLEX | syscall.FILE_FLAG_OVERLAPPED
- if first {
- flags |= cFILE_FLAG_FIRST_PIPE_INSTANCE
- }
-
- var mode uint32 = cPIPE_REJECT_REMOTE_CLIENTS
- if c.MessageMode {
- mode |= cPIPE_TYPE_MESSAGE
- }
-
- var sa securityAttributes
- sa.Length = uint32(unsafe.Sizeof(sa))
- if securityDescriptor != nil {
- sa.SecurityDescriptor = &securityDescriptor[0]
- }
- h, err := createNamedPipe(path, flags, mode, cPIPE_UNLIMITED_INSTANCES, uint32(c.OutputBufferSize), uint32(c.InputBufferSize), 0, &sa)
- if err != nil {
- return 0, &os.PathError{Op: "open", Path: path, Err: err}
- }
- return h, nil
-}
-
-func (l *win32PipeListener) makeServerPipe() (*win32File, error) {
- h, err := makeServerPipeHandle(l.path, l.securityDescriptor, &l.config, false)
- if err != nil {
- return nil, err
- }
- f, err := makeWin32File(h)
- if err != nil {
- syscall.Close(h)
- return nil, err
- }
- return f, nil
-}
-
-func (l *win32PipeListener) listenerRoutine() {
- closed := false
- for !closed {
- select {
- case <-l.closeCh:
- closed = true
- case responseCh := <-l.acceptCh:
- p, err := l.makeServerPipe()
- if err == nil {
- // Wait for the client to connect.
- ch := make(chan error)
- go func() {
- ch <- connectPipe(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
- }
- closed = true
- }
- }
- responseCh <- acceptResponse{p, err}
- }
- }
- syscall.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 in SDDL format.
- SecurityDescriptor string
-
- // 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) {
- var (
- sd []byte
- err error
- )
- if c == nil {
- c = &PipeConfig{}
- }
- if c.SecurityDescriptor != "" {
- sd, err = SddlToSecurityDescriptor(c.SecurityDescriptor)
- if err != nil {
- return nil, err
- }
- }
- h, err := makeServerPipeHandle(path, sd, c, true)
- if err != nil {
- return nil, err
- }
- // Immediately open and then close a client handle so that the named pipe is
- // created but not currently accepting connections.
- h2, err := createFile(path, 0, 0, nil, syscall.OPEN_EXISTING, cSECURITY_SQOS_PRESENT|cSECURITY_ANONYMOUS, 0)
- if err != nil {
- syscall.Close(h)
- return nil, err
- }
- syscall.Close(h2)
- l := &win32PipeListener{
- firstHandle: h,
- path: path,
- securityDescriptor: sd,
- 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
- }
- err = connectNamedPipe(p.handle, &c.o)
- _, err = p.asyncIo(c, time.Time{}, 0, err)
- if err != nil && err != cERROR_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)
-}