71 lines
2.1 KiB
Go
71 lines
2.1 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 creates either a Unix socket, if possible, or
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// otherwise a localhost TCP connection.
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package safesocket
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import (
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"errors"
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"net"
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"runtime"
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)
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type closeable interface {
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CloseRead() error
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CloseWrite() error
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}
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// ConnCloseRead calls c's CloseRead method. c is expected to be
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// either a UnixConn or TCPConn as returned from this package.
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func ConnCloseRead(c net.Conn) error {
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return c.(closeable).CloseRead()
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}
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// ConnCloseWrite calls c's CloseWrite method. c is expected to be
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// either a UnixConn or TCPConn as returned from this package.
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func ConnCloseWrite(c net.Conn) error {
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return c.(closeable).CloseWrite()
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}
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// Connect connects to either path (on Unix) or the provided localhost port (on Windows).
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func Connect(path string, port uint16) (net.Conn, error) {
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return connect(path, port)
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}
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// Listen returns a listener either on Unix socket path (on Unix), or
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// the localhost port (on Windows).
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// If port is 0, the returned gotPort says which port was selected on Windows.
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func Listen(path string, port uint16) (_ net.Listener, gotPort uint16, _ error) {
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return listen(path, port)
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}
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var (
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ErrTokenNotFound = errors.New("no token found")
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ErrNoTokenOnOS = errors.New("no token on " + runtime.GOOS)
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)
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var localTCPPortAndToken func() (port int, token string, err error)
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// LocalTCPPortAndToken returns the port number and auth token to connect to
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// the local Tailscale daemon. It's currently only applicable on macOS
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// when tailscaled is being run in the Mac Sandbox from the App Store version
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// of Tailscale.
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func LocalTCPPortAndToken() (port int, token string, err error) {
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if localTCPPortAndToken == nil {
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return 0, "", ErrNoTokenOnOS
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}
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return localTCPPortAndToken()
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}
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// PlatformUsesPeerCreds reports whether the current platform uses peer credentials
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// to authenticate connections.
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func PlatformUsesPeerCreds() bool {
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switch runtime.GOOS {
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case "linux", "darwin", "freebsd":
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return true
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}
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return false
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}
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