A Windows named pipe implementation written in pure Go.
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natefinch fix a race condition (#21)
There was an obvious race condition where both Accept and Close were
twiddling with PipeListener.close.. but there was also a less obvious race
cnodition where if you called Close between createpipe and
connectnamedpipe, the connect would hang forever. These are both now fixed
by making the mutex protect the entire accept/close methods (aside from
waitsingleobject, which will correctly error out if you call close while
it waits).
Latest commit c1b8fa8 Jun 21, 2016

README.md

npipe Build status GoDoc

Package npipe provides a pure Go wrapper around Windows named pipes.

Windows named pipe documentation: http://msdn.microsoft.com/en-us/library/windows/desktop/aa365780

Note that the code lives at https://github.com/natefinch/npipe (v2 branch) but should be imported as gopkg.in/natefinch/npipe.v2 (the package name is still npipe).

npipe provides an interface based on stdlib's net package, with Dial, Listen, and Accept functions, as well as associated implementations of net.Conn and net.Listener. It supports rpc over the connection.

Notes

  • Deadlines for reading/writing to the connection are only functional in Windows Vista/Server 2008 and above, due to limitations with the Windows API.

  • The pipes support byte mode only (no support for message mode)

Examples

The Dial function connects a client to a named pipe:

conn, err := npipe.Dial(`\\.\pipe\mypipename`)
if err != nil {
	<handle error>
}
fmt.Fprintf(conn, "Hi server!\n")
msg, err := bufio.NewReader(conn).ReadString('\n')
...

The Listen function creates servers:

ln, err := npipe.Listen(`\\.\pipe\mypipename`)
if err != nil {
	// handle error
}
for {
	conn, err := ln.Accept()
	if err != nil {
		// handle error
		continue
	}
	go handleConnection(conn)
}

Variables

var ErrClosed = PipeError{"Pipe has been closed.", false}

ErrClosed is the error returned by PipeListener.Accept when Close is called on the PipeListener.

type PipeAddr

type PipeAddr string

PipeAddr represents the address of a named pipe.

func (PipeAddr) Network

func (a PipeAddr) Network() string

Network returns the address's network name, "pipe".

func (PipeAddr) String

func (a PipeAddr) String() string

String returns the address of the pipe

type PipeConn

type PipeConn struct {
    // contains filtered or unexported fields
}

PipeConn is the implementation of the net.Conn interface for named pipe connections.

func Dial

func Dial(address string) (*PipeConn, error)

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 \\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 DialTimeout

func DialTimeout(address string, timeout time.Duration) (*PipeConn, error)

DialTimeout acts like Dial, but will time out after the duration of timeout

func (*PipeConn) Close

func (c *PipeConn) Close() error

Close closes the connection.

func (*PipeConn) LocalAddr

func (c *PipeConn) LocalAddr() net.Addr

LocalAddr returns the local network address.

func (*PipeConn) Read

func (c *PipeConn) Read(b []byte) (int, error)

Read implements the net.Conn Read method.

func (*PipeConn) RemoteAddr

func (c *PipeConn) RemoteAddr() net.Addr

RemoteAddr returns the remote network address.

func (*PipeConn) SetDeadline

func (c *PipeConn) SetDeadline(t time.Time) error

SetDeadline implements the net.Conn SetDeadline method. Note that timeouts are only supported on Windows Vista/Server 2008 and above

func (*PipeConn) SetReadDeadline

func (c *PipeConn) SetReadDeadline(t time.Time) error

SetReadDeadline implements the net.Conn SetReadDeadline method. Note that timeouts are only supported on Windows Vista/Server 2008 and above

func (*PipeConn) SetWriteDeadline

func (c *PipeConn) SetWriteDeadline(t time.Time) error

SetWriteDeadline implements the net.Conn SetWriteDeadline method. Note that timeouts are only supported on Windows Vista/Server 2008 and above

func (*PipeConn) Write

func (c *PipeConn) Write(b []byte) (int, error)

Write implements the net.Conn Write method.

type PipeError

type PipeError struct {
    // contains filtered or unexported fields
}

PipeError is an error related to a call to a pipe

func (PipeError) Error

func (e PipeError) Error() string

Error implements the error interface

func (PipeError) Temporary

func (e PipeError) Temporary() bool

Temporary implements net.AddrError.Temporary()

func (PipeError) Timeout

func (e PipeError) Timeout() bool

Timeout implements net.AddrError.Timeout()

type PipeListener

type PipeListener struct {
    // contains filtered or unexported fields
}

PipeListener is a named pipe listener. Clients should typically use variables of type net.Listener instead of assuming named pipe.

func Listen

func Listen(address string) (*PipeListener, error)

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 (*PipeListener) Accept

func (l *PipeListener) Accept() (net.Conn, error)

Accept implements the Accept method in the net.Listener interface; it waits for the next call and returns a generic net.Conn.

func (*PipeListener) AcceptPipe

func (l *PipeListener) AcceptPipe() (*PipeConn, error)

AcceptPipe accepts the next incoming call and returns the new connection.

func (*PipeListener) Addr

func (l *PipeListener) Addr() net.Addr

Addr returns the listener's network address, a PipeAddr.

func (*PipeListener) Close

func (l *PipeListener) Close() error

Close stops listening on the address. Already Accepted connections are not closed.