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tailscale/safesocket/pipe_windows.go

49 lines
1.4 KiB
Go

// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package safesocket
import (
"context"
"fmt"
"net"
"syscall"
)
func path(vendor, name string, port uint16) string {
return fmt.Sprintf("127.0.0.1:%v", port)
}
func connect(path string, port uint16) (net.Conn, error) {
pipe, err := net.Dial("tcp", fmt.Sprintf("127.0.0.1:%d", port))
if err != nil {
return nil, err
}
return pipe, err
}
func setFlags(network, address string, c syscall.RawConn) error {
return c.Control(func(fd uintptr) {
syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET,
syscall.SO_REUSEADDR, 1)
})
}
// TODO(apenwarr): use named pipes instead of sockets?
// I tried to use winio.ListenPipe() here, but that code is a disaster,
// built on top of an API that's a disaster. So for now we'll hack it by
// just always using a TCP session on a fixed port on localhost. As a
// result, on Windows we ignore the vendor and name strings.
// NOTE(bradfitz): Jason did a new pipe package: https://go-review.googlesource.com/c/sys/+/299009
func listen(path string, port uint16) (_ net.Listener, gotPort uint16, _ error) {
lc := net.ListenConfig{
Control: setFlags,
}
pipe, err := lc.Listen(context.Background(), "tcp", fmt.Sprintf("127.0.0.1:%d", port))
if err != nil {
return nil, 0, err
}
return pipe, uint16(pipe.Addr().(*net.TCPAddr).Port), err
}