|
@@ -1,518 +0,0 @@
|
|
-package npipe
|
|
|
|
-
|
|
|
|
-//sys createNamedPipe(name *uint16, openMode uint32, pipeMode uint32, maxInstances uint32, outBufSize uint32, inBufSize uint32, defaultTimeout uint32, sa *syscall.SecurityAttributes) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = CreateNamedPipeW
|
|
|
|
-//sys connectNamedPipe(handle syscall.Handle, overlapped *syscall.Overlapped) (err error) = ConnectNamedPipe
|
|
|
|
-//sys disconnectNamedPipe(handle syscall.Handle) (err error) = DisconnectNamedPipe
|
|
|
|
-//sys waitNamedPipe(name *uint16, timeout uint32) (err error) = WaitNamedPipeW
|
|
|
|
-//sys createEvent(sa *syscall.SecurityAttributes, manualReset bool, initialState bool, name *uint16) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = CreateEventW
|
|
|
|
-//sys getOverlappedResult(handle syscall.Handle, overlapped *syscall.Overlapped, transferred *uint32, wait bool) (err error) = GetOverlappedResult
|
|
|
|
-//sys cancelIoEx(handle syscall.Handle, overlapped *syscall.Overlapped) (err error) = CancelIoEx
|
|
|
|
-
|
|
|
|
-import (
|
|
|
|
- "fmt"
|
|
|
|
- "io"
|
|
|
|
- "net"
|
|
|
|
- "sync"
|
|
|
|
- "syscall"
|
|
|
|
- "time"
|
|
|
|
-)
|
|
|
|
-
|
|
|
|
-const (
|
|
|
|
- // openMode
|
|
|
|
- pipe_access_duplex = 0x3
|
|
|
|
- pipe_access_inbound = 0x1
|
|
|
|
- pipe_access_outbound = 0x2
|
|
|
|
-
|
|
|
|
- // openMode write flags
|
|
|
|
- file_flag_first_pipe_instance = 0x00080000
|
|
|
|
- file_flag_write_through = 0x80000000
|
|
|
|
- file_flag_overlapped = 0x40000000
|
|
|
|
-
|
|
|
|
- // openMode ACL flags
|
|
|
|
- write_dac = 0x00040000
|
|
|
|
- write_owner = 0x00080000
|
|
|
|
- access_system_security = 0x01000000
|
|
|
|
-
|
|
|
|
- // pipeMode
|
|
|
|
- pipe_type_byte = 0x0
|
|
|
|
- pipe_type_message = 0x4
|
|
|
|
-
|
|
|
|
- // pipeMode read mode flags
|
|
|
|
- pipe_readmode_byte = 0x0
|
|
|
|
- pipe_readmode_message = 0x2
|
|
|
|
-
|
|
|
|
- // pipeMode wait mode flags
|
|
|
|
- pipe_wait = 0x0
|
|
|
|
- pipe_nowait = 0x1
|
|
|
|
-
|
|
|
|
- // pipeMode remote-client mode flags
|
|
|
|
- pipe_accept_remote_clients = 0x0
|
|
|
|
- pipe_reject_remote_clients = 0x8
|
|
|
|
-
|
|
|
|
- pipe_unlimited_instances = 255
|
|
|
|
-
|
|
|
|
- nmpwait_wait_forever = 0xFFFFFFFF
|
|
|
|
-
|
|
|
|
- // the two not-an-errors below occur if a client connects to the pipe between
|
|
|
|
- // the server's CreateNamedPipe and ConnectNamedPipe calls.
|
|
|
|
- error_no_data syscall.Errno = 0xE8
|
|
|
|
- error_pipe_connected syscall.Errno = 0x217
|
|
|
|
- error_pipe_busy syscall.Errno = 0xE7
|
|
|
|
- error_sem_timeout syscall.Errno = 0x79
|
|
|
|
-
|
|
|
|
- error_bad_pathname syscall.Errno = 0xA1
|
|
|
|
- error_invalid_name syscall.Errno = 0x7B
|
|
|
|
-
|
|
|
|
- error_io_incomplete syscall.Errno = 0x3e4
|
|
|
|
-)
|
|
|
|
-
|
|
|
|
-var _ net.Conn = (*PipeConn)(nil)
|
|
|
|
-var _ net.Listener = (*PipeListener)(nil)
|
|
|
|
-
|
|
|
|
-// ErrClosed is the error returned by PipeListener.Accept when Close is called
|
|
|
|
-// on the PipeListener.
|
|
|
|
-var ErrClosed = PipeError{"Pipe has been closed.", false}
|
|
|
|
-
|
|
|
|
-// PipeError is an error related to a call to a pipe
|
|
|
|
-type PipeError struct {
|
|
|
|
- msg string
|
|
|
|
- timeout bool
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// Error implements the error interface
|
|
|
|
-func (e PipeError) Error() string {
|
|
|
|
- return e.msg
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// Timeout implements net.AddrError.Timeout()
|
|
|
|
-func (e PipeError) Timeout() bool {
|
|
|
|
- return e.timeout
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// Temporary implements net.AddrError.Temporary()
|
|
|
|
-func (e PipeError) Temporary() bool {
|
|
|
|
- return false
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// Dial connects to a named pipe with the given address. If the specified pipe is not available,
|
|
|
|
-// it will wait indefinitely for the pipe to become available.
|
|
|
|
-//
|
|
|
|
-// The address must be of the form \\.\\pipe\<name> for local pipes and \\<computer>\pipe\<name>
|
|
|
|
-// for remote pipes.
|
|
|
|
-//
|
|
|
|
-// Dial will return a PipeError if you pass in a badly formatted pipe name.
|
|
|
|
-//
|
|
|
|
-// Examples:
|
|
|
|
-// // local pipe
|
|
|
|
-// conn, err := Dial(`\\.\pipe\mypipename`)
|
|
|
|
-//
|
|
|
|
-// // remote pipe
|
|
|
|
-// conn, err := Dial(`\\othercomp\pipe\mypipename`)
|
|
|
|
-func Dial(address string) (*PipeConn, error) {
|
|
|
|
- for {
|
|
|
|
- conn, err := dial(address, nmpwait_wait_forever)
|
|
|
|
- if err == nil {
|
|
|
|
- return conn, nil
|
|
|
|
- }
|
|
|
|
- if isPipeNotReady(err) {
|
|
|
|
- <-time.After(100 * time.Millisecond)
|
|
|
|
- continue
|
|
|
|
- }
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// DialTimeout acts like Dial, but will time out after the duration of timeout
|
|
|
|
-func DialTimeout(address string, timeout time.Duration) (*PipeConn, error) {
|
|
|
|
- deadline := time.Now().Add(timeout)
|
|
|
|
-
|
|
|
|
- now := time.Now()
|
|
|
|
- for now.Before(deadline) {
|
|
|
|
- millis := uint32(deadline.Sub(now) / time.Millisecond)
|
|
|
|
- conn, err := dial(address, millis)
|
|
|
|
- if err == nil {
|
|
|
|
- return conn, nil
|
|
|
|
- }
|
|
|
|
- if err == error_sem_timeout {
|
|
|
|
- // This is WaitNamedPipe's timeout error, so we know we're done
|
|
|
|
- return nil, PipeError{fmt.Sprintf(
|
|
|
|
- "Timed out waiting for pipe '%s' to come available", address), true}
|
|
|
|
- }
|
|
|
|
- if isPipeNotReady(err) {
|
|
|
|
- left := deadline.Sub(time.Now())
|
|
|
|
- retry := 100 * time.Millisecond
|
|
|
|
- if left > retry {
|
|
|
|
- <-time.After(retry)
|
|
|
|
- } else {
|
|
|
|
- <-time.After(left - time.Millisecond)
|
|
|
|
- }
|
|
|
|
- now = time.Now()
|
|
|
|
- continue
|
|
|
|
- }
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
- return nil, PipeError{fmt.Sprintf(
|
|
|
|
- "Timed out waiting for pipe '%s' to come available", address), true}
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// isPipeNotReady checks the error to see if it indicates the pipe is not ready
|
|
|
|
-func isPipeNotReady(err error) bool {
|
|
|
|
- // Pipe Busy means another client just grabbed the open pipe end,
|
|
|
|
- // and the server hasn't made a new one yet.
|
|
|
|
- // File Not Found means the server hasn't created the pipe yet.
|
|
|
|
- // Neither is a fatal error.
|
|
|
|
-
|
|
|
|
- return err == syscall.ERROR_FILE_NOT_FOUND || err == error_pipe_busy
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// newOverlapped creates a structure used to track asynchronous
|
|
|
|
-// I/O requests that have been issued.
|
|
|
|
-func newOverlapped() (*syscall.Overlapped, error) {
|
|
|
|
- event, err := createEvent(nil, true, true, nil)
|
|
|
|
- if err != nil {
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
- return &syscall.Overlapped{HEvent: event}, nil
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// waitForCompletion waits for an asynchronous I/O request referred to by overlapped to complete.
|
|
|
|
-// This function returns the number of bytes transferred by the operation and an error code if
|
|
|
|
-// applicable (nil otherwise).
|
|
|
|
-func waitForCompletion(handle syscall.Handle, overlapped *syscall.Overlapped) (uint32, error) {
|
|
|
|
- _, err := syscall.WaitForSingleObject(overlapped.HEvent, syscall.INFINITE)
|
|
|
|
- if err != nil {
|
|
|
|
- return 0, err
|
|
|
|
- }
|
|
|
|
- var transferred uint32
|
|
|
|
- err = getOverlappedResult(handle, overlapped, &transferred, true)
|
|
|
|
- return transferred, err
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// dial is a helper to initiate a connection to a named pipe that has been started by a server.
|
|
|
|
-// The timeout is only enforced if the pipe server has already created the pipe, otherwise
|
|
|
|
-// this function will return immediately.
|
|
|
|
-func dial(address string, timeout uint32) (*PipeConn, error) {
|
|
|
|
- name, err := syscall.UTF16PtrFromString(string(address))
|
|
|
|
- if err != nil {
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
- // If at least one instance of the pipe has been created, this function
|
|
|
|
- // will wait timeout milliseconds for it to become available.
|
|
|
|
- // It will return immediately regardless of timeout, if no instances
|
|
|
|
- // of the named pipe have been created yet.
|
|
|
|
- // If this returns with no error, there is a pipe available.
|
|
|
|
- if err := waitNamedPipe(name, timeout); err != nil {
|
|
|
|
- if err == error_bad_pathname {
|
|
|
|
- // badly formatted pipe name
|
|
|
|
- return nil, badAddr(address)
|
|
|
|
- }
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
- pathp, err := syscall.UTF16PtrFromString(address)
|
|
|
|
- if err != nil {
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
- handle, err := syscall.CreateFile(pathp, syscall.GENERIC_READ|syscall.GENERIC_WRITE,
|
|
|
|
- uint32(syscall.FILE_SHARE_READ|syscall.FILE_SHARE_WRITE), nil, syscall.OPEN_EXISTING,
|
|
|
|
- syscall.FILE_FLAG_OVERLAPPED, 0)
|
|
|
|
- if err != nil {
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
- return &PipeConn{handle: handle, addr: PipeAddr(address)}, nil
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// Listen returns a new PipeListener that will listen on a pipe with the given
|
|
|
|
-// address. The address must be of the form \\.\pipe\<name>
|
|
|
|
-//
|
|
|
|
-// Listen will return a PipeError for an incorrectly formatted pipe name.
|
|
|
|
-func Listen(address string) (*PipeListener, error) {
|
|
|
|
- handle, err := createPipe(address, true)
|
|
|
|
- if err == error_invalid_name {
|
|
|
|
- return nil, badAddr(address)
|
|
|
|
- }
|
|
|
|
- if err != nil {
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
- return &PipeListener{
|
|
|
|
- addr: PipeAddr(address),
|
|
|
|
- handle: handle,
|
|
|
|
- }, nil
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// PipeListener is a named pipe listener. Clients should typically
|
|
|
|
-// use variables of type net.Listener instead of assuming named pipe.
|
|
|
|
-type PipeListener struct {
|
|
|
|
- addr PipeAddr
|
|
|
|
- handle syscall.Handle
|
|
|
|
- closed bool
|
|
|
|
-
|
|
|
|
- // acceptHandle contains the current handle waiting for
|
|
|
|
- // an incoming connection or nil.
|
|
|
|
- acceptHandle syscall.Handle
|
|
|
|
- // acceptOverlapped is set before waiting on a connection.
|
|
|
|
- // If not waiting, it is nil.
|
|
|
|
- acceptOverlapped *syscall.Overlapped
|
|
|
|
- // acceptMutex protects the handle and overlapped structure.
|
|
|
|
- acceptMutex sync.Mutex
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// Accept implements the Accept method in the net.Listener interface; it
|
|
|
|
-// waits for the next call and returns a generic net.Conn.
|
|
|
|
-func (l *PipeListener) Accept() (net.Conn, error) {
|
|
|
|
- c, err := l.AcceptPipe()
|
|
|
|
- for err == error_no_data {
|
|
|
|
- // Ignore clients that connect and immediately disconnect.
|
|
|
|
- c, err = l.AcceptPipe()
|
|
|
|
- }
|
|
|
|
- if err != nil {
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
- return c, nil
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// AcceptPipe accepts the next incoming call and returns the new connection.
|
|
|
|
-// It might return an error if a client connected and immediately cancelled
|
|
|
|
-// the connection.
|
|
|
|
-func (l *PipeListener) AcceptPipe() (*PipeConn, error) {
|
|
|
|
- if l == nil || l.addr == "" || l.closed {
|
|
|
|
- return nil, syscall.EINVAL
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- // the first time we call accept, the handle will have been created by the Listen
|
|
|
|
- // call. This is to prevent race conditions where the client thinks the server
|
|
|
|
- // isn't listening because it hasn't actually called create yet. After the first time, we'll
|
|
|
|
- // have to create a new handle each time
|
|
|
|
- handle := l.handle
|
|
|
|
- if handle == 0 {
|
|
|
|
- var err error
|
|
|
|
- handle, err = createPipe(string(l.addr), false)
|
|
|
|
- if err != nil {
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
- } else {
|
|
|
|
- l.handle = 0
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- overlapped, err := newOverlapped()
|
|
|
|
- if err != nil {
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
- defer syscall.CloseHandle(overlapped.HEvent)
|
|
|
|
- if err := connectNamedPipe(handle, overlapped); err != nil && err != error_pipe_connected {
|
|
|
|
- if err == error_io_incomplete || err == syscall.ERROR_IO_PENDING {
|
|
|
|
- l.acceptMutex.Lock()
|
|
|
|
- l.acceptOverlapped = overlapped
|
|
|
|
- l.acceptHandle = handle
|
|
|
|
- l.acceptMutex.Unlock()
|
|
|
|
- defer func() {
|
|
|
|
- l.acceptMutex.Lock()
|
|
|
|
- l.acceptOverlapped = nil
|
|
|
|
- l.acceptHandle = 0
|
|
|
|
- l.acceptMutex.Unlock()
|
|
|
|
- }()
|
|
|
|
-
|
|
|
|
- _, err = waitForCompletion(handle, overlapped)
|
|
|
|
- }
|
|
|
|
- if err == syscall.ERROR_OPERATION_ABORTED {
|
|
|
|
- // Return error compatible to net.Listener.Accept() in case the
|
|
|
|
- // listener was closed.
|
|
|
|
- return nil, ErrClosed
|
|
|
|
- }
|
|
|
|
- if err != nil {
|
|
|
|
- return nil, err
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
- return &PipeConn{handle: handle, addr: l.addr}, nil
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// Close stops listening on the address.
|
|
|
|
-// Already Accepted connections are not closed.
|
|
|
|
-func (l *PipeListener) Close() error {
|
|
|
|
- if l.closed {
|
|
|
|
- return nil
|
|
|
|
- }
|
|
|
|
- l.closed = true
|
|
|
|
- if l.handle != 0 {
|
|
|
|
- err := disconnectNamedPipe(l.handle)
|
|
|
|
- if err != nil {
|
|
|
|
- return err
|
|
|
|
- }
|
|
|
|
- err = syscall.CloseHandle(l.handle)
|
|
|
|
- if err != nil {
|
|
|
|
- return err
|
|
|
|
- }
|
|
|
|
- l.handle = 0
|
|
|
|
- }
|
|
|
|
- l.acceptMutex.Lock()
|
|
|
|
- defer l.acceptMutex.Unlock()
|
|
|
|
- if l.acceptOverlapped != nil && l.acceptHandle != 0 {
|
|
|
|
- // Cancel the pending IO. This call does not block, so it is safe
|
|
|
|
- // to hold onto the mutex above.
|
|
|
|
- if err := cancelIoEx(l.acceptHandle, l.acceptOverlapped); err != nil {
|
|
|
|
- return err
|
|
|
|
- }
|
|
|
|
- err := syscall.CloseHandle(l.acceptOverlapped.HEvent)
|
|
|
|
- if err != nil {
|
|
|
|
- return err
|
|
|
|
- }
|
|
|
|
- l.acceptOverlapped.HEvent = 0
|
|
|
|
- err = syscall.CloseHandle(l.acceptHandle)
|
|
|
|
- if err != nil {
|
|
|
|
- return err
|
|
|
|
- }
|
|
|
|
- l.acceptHandle = 0
|
|
|
|
- }
|
|
|
|
- return nil
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// Addr returns the listener's network address, a PipeAddr.
|
|
|
|
-func (l *PipeListener) Addr() net.Addr { return l.addr }
|
|
|
|
-
|
|
|
|
-// PipeConn is the implementation of the net.Conn interface for named pipe connections.
|
|
|
|
-type PipeConn struct {
|
|
|
|
- handle syscall.Handle
|
|
|
|
- addr PipeAddr
|
|
|
|
-
|
|
|
|
- // these aren't actually used yet
|
|
|
|
- readDeadline *time.Time
|
|
|
|
- writeDeadline *time.Time
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-type iodata struct {
|
|
|
|
- n uint32
|
|
|
|
- err error
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// completeRequest looks at iodata to see if a request is pending. If so, it waits for it to either complete or to
|
|
|
|
-// abort due to hitting the specified deadline. Deadline may be set to nil to wait forever. If no request is pending,
|
|
|
|
-// the content of iodata is returned.
|
|
|
|
-func (c *PipeConn) completeRequest(data iodata, deadline *time.Time, overlapped *syscall.Overlapped) (int, error) {
|
|
|
|
- if data.err == error_io_incomplete || data.err == syscall.ERROR_IO_PENDING {
|
|
|
|
- var timer <-chan time.Time
|
|
|
|
- if deadline != nil {
|
|
|
|
- if timeDiff := deadline.Sub(time.Now()); timeDiff > 0 {
|
|
|
|
- timer = time.After(timeDiff)
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
- done := make(chan iodata)
|
|
|
|
- go func() {
|
|
|
|
- n, err := waitForCompletion(c.handle, overlapped)
|
|
|
|
- done <- iodata{n, err}
|
|
|
|
- }()
|
|
|
|
- select {
|
|
|
|
- case data = <-done:
|
|
|
|
- case <-timer:
|
|
|
|
- syscall.CancelIoEx(c.handle, overlapped)
|
|
|
|
- data = iodata{0, timeout(c.addr.String())}
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
- // Windows will produce ERROR_BROKEN_PIPE upon closing
|
|
|
|
- // a handle on the other end of a connection. Go RPC
|
|
|
|
- // expects an io.EOF error in this case.
|
|
|
|
- if data.err == syscall.ERROR_BROKEN_PIPE {
|
|
|
|
- data.err = io.EOF
|
|
|
|
- }
|
|
|
|
- return int(data.n), data.err
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// Read implements the net.Conn Read method.
|
|
|
|
-func (c *PipeConn) Read(b []byte) (int, error) {
|
|
|
|
- // Use ReadFile() rather than Read() because the latter
|
|
|
|
- // contains a workaround that eats ERROR_BROKEN_PIPE.
|
|
|
|
- overlapped, err := newOverlapped()
|
|
|
|
- if err != nil {
|
|
|
|
- return 0, err
|
|
|
|
- }
|
|
|
|
- defer syscall.CloseHandle(overlapped.HEvent)
|
|
|
|
- var n uint32
|
|
|
|
- err = syscall.ReadFile(c.handle, b, &n, overlapped)
|
|
|
|
- return c.completeRequest(iodata{n, err}, c.readDeadline, overlapped)
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// Write implements the net.Conn Write method.
|
|
|
|
-func (c *PipeConn) Write(b []byte) (int, error) {
|
|
|
|
- overlapped, err := newOverlapped()
|
|
|
|
- if err != nil {
|
|
|
|
- return 0, err
|
|
|
|
- }
|
|
|
|
- defer syscall.CloseHandle(overlapped.HEvent)
|
|
|
|
- var n uint32
|
|
|
|
- err = syscall.WriteFile(c.handle, b, &n, overlapped)
|
|
|
|
- return c.completeRequest(iodata{n, err}, c.writeDeadline, overlapped)
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// Close closes the connection.
|
|
|
|
-func (c *PipeConn) Close() error {
|
|
|
|
- return syscall.CloseHandle(c.handle)
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// LocalAddr returns the local network address.
|
|
|
|
-func (c *PipeConn) LocalAddr() net.Addr {
|
|
|
|
- return c.addr
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// RemoteAddr returns the remote network address.
|
|
|
|
-func (c *PipeConn) RemoteAddr() net.Addr {
|
|
|
|
- // not sure what to do here, we don't have remote addr....
|
|
|
|
- return c.addr
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// SetDeadline implements the net.Conn SetDeadline method.
|
|
|
|
-// Note that timeouts are only supported on Windows Vista/Server 2008 and above
|
|
|
|
-func (c *PipeConn) SetDeadline(t time.Time) error {
|
|
|
|
- c.SetReadDeadline(t)
|
|
|
|
- c.SetWriteDeadline(t)
|
|
|
|
- return nil
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// SetReadDeadline implements the net.Conn SetReadDeadline method.
|
|
|
|
-// Note that timeouts are only supported on Windows Vista/Server 2008 and above
|
|
|
|
-func (c *PipeConn) SetReadDeadline(t time.Time) error {
|
|
|
|
- c.readDeadline = &t
|
|
|
|
- return nil
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// SetWriteDeadline implements the net.Conn SetWriteDeadline method.
|
|
|
|
-// Note that timeouts are only supported on Windows Vista/Server 2008 and above
|
|
|
|
-func (c *PipeConn) SetWriteDeadline(t time.Time) error {
|
|
|
|
- c.writeDeadline = &t
|
|
|
|
- return nil
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// PipeAddr represents the address of a named pipe.
|
|
|
|
-type PipeAddr string
|
|
|
|
-
|
|
|
|
-// Network returns the address's network name, "pipe".
|
|
|
|
-func (a PipeAddr) Network() string { return "pipe" }
|
|
|
|
-
|
|
|
|
-// String returns the address of the pipe
|
|
|
|
-func (a PipeAddr) String() string {
|
|
|
|
- return string(a)
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-// createPipe is a helper function to make sure we always create pipes
|
|
|
|
-// with the same arguments, since subsequent calls to create pipe need
|
|
|
|
-// to use the same arguments as the first one. If first is set, fail
|
|
|
|
-// if the pipe already exists.
|
|
|
|
-func createPipe(address string, first bool) (syscall.Handle, error) {
|
|
|
|
- n, err := syscall.UTF16PtrFromString(address)
|
|
|
|
- if err != nil {
|
|
|
|
- return 0, err
|
|
|
|
- }
|
|
|
|
- mode := uint32(pipe_access_duplex | syscall.FILE_FLAG_OVERLAPPED)
|
|
|
|
- if first {
|
|
|
|
- mode |= file_flag_first_pipe_instance
|
|
|
|
- }
|
|
|
|
- return createNamedPipe(n,
|
|
|
|
- mode,
|
|
|
|
- pipe_type_byte,
|
|
|
|
- pipe_unlimited_instances,
|
|
|
|
- 512, 512, 0, nil)
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-func badAddr(addr string) PipeError {
|
|
|
|
- return PipeError{fmt.Sprintf("Invalid pipe address '%s'.", addr), false}
|
|
|
|
-}
|
|
|
|
-func timeout(addr string) PipeError {
|
|
|
|
- return PipeError{fmt.Sprintf("Pipe IO timed out waiting for '%s'", addr), true}
|
|
|
|
-}
|
|
|