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4460bd638b
On unix, we want to provide a full path to the desired unix socket. On windows, currently we want to provide a TCP port, but someday we'll also provide a "path-ish" object for a named pipe. For now, simplify the API down to exactly a path and a TCP port. Signed-off-by: David Anderson <dave@natulte.net>
58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package safesocket
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import (
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"context"
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"fmt"
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"net"
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"syscall"
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)
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func path(vendor, name string, port uint16) string {
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return fmt.Sprintf("127.0.0.1:%v", port)
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}
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func ConnCloseRead(c net.Conn) error {
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return c.(*net.TCPConn).CloseRead()
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}
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func ConnCloseWrite(c net.Conn) error {
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return c.(*net.TCPConn).CloseWrite()
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}
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// TODO(apenwarr): handle magic cookie auth
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func Connect(path string, port uint16) (net.Conn, error) {
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pipe, err := net.Dial("tcp", fmt.Sprintf("127.0.0.1:%d", port))
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if err != nil {
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return nil, err
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}
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return pipe, err
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}
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func setFlags(network, address string, c syscall.RawConn) error {
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return c.Control(func(fd uintptr) {
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syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET,
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syscall.SO_REUSEADDR, 1)
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})
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}
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// TODO(apenwarr): use named pipes instead of sockets?
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// I tried to use winio.ListenPipe() here, but that code is a disaster,
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// built on top of an API that's a disaster. So for now we'll hack it by
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// just always using a TCP session on a fixed port on localhost. As a
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// result, on Windows we ignore the vendor and name strings.
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// TODO(apenwarr): handle magic cookie auth
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func Listen(path string, port uint16) (net.Listener, uint16, error) {
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lc := net.ListenConfig{
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Control: setFlags,
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}
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pipe, err := lc.Listen(context.Background(), "tcp", fmt.Sprintf("127.0.0.1:%d", port))
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if err != nil {
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return nil, 0, err
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}
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return pipe, uint16(pipe.Addr().(*net.TCPAddr).Port), err
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}
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