uapi_windows.go raw

   1  /* SPDX-License-Identifier: MIT
   2   *
   3   * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
   4   */
   5  
   6  package ipc
   7  
   8  import (
   9  	"net"
  10  
  11  	"golang.org/x/sys/windows"
  12  	"golang.zx2c4.com/wireguard/ipc/namedpipe"
  13  )
  14  
  15  // TODO: replace these with actual standard windows error numbers from the win package
  16  const (
  17  	IpcErrorIO        = -int64(5)
  18  	IpcErrorProtocol  = -int64(71)
  19  	IpcErrorInvalid   = -int64(22)
  20  	IpcErrorPortInUse = -int64(98)
  21  	IpcErrorUnknown   = -int64(55)
  22  )
  23  
  24  type UAPIListener struct {
  25  	listener net.Listener // unix socket listener
  26  	connNew  chan net.Conn
  27  	connErr  chan error
  28  	kqueueFd int
  29  	keventFd int
  30  }
  31  
  32  func (l *UAPIListener) Accept() (net.Conn, error) {
  33  	for {
  34  		select {
  35  		case conn := <-l.connNew:
  36  			return conn, nil
  37  
  38  		case err := <-l.connErr:
  39  			return nil, err
  40  		}
  41  	}
  42  }
  43  
  44  func (l *UAPIListener) Close() error {
  45  	return l.listener.Close()
  46  }
  47  
  48  func (l *UAPIListener) Addr() net.Addr {
  49  	return l.listener.Addr()
  50  }
  51  
  52  var UAPISecurityDescriptor *windows.SECURITY_DESCRIPTOR
  53  
  54  func init() {
  55  	var err error
  56  	UAPISecurityDescriptor, err = windows.SecurityDescriptorFromString("O:SYD:P(A;;GA;;;SY)(A;;GA;;;BA)S:(ML;;NWNRNX;;;HI)")
  57  	if err != nil {
  58  		panic(err)
  59  	}
  60  }
  61  
  62  func UAPIListen(name string) (net.Listener, error) {
  63  	listener, err := (&namedpipe.ListenConfig{
  64  		SecurityDescriptor: UAPISecurityDescriptor,
  65  	}).Listen(`\\.\pipe\ProtectedPrefix\Administrators\WireGuard\` + name)
  66  	if err != nil {
  67  		return nil, err
  68  	}
  69  
  70  	uapi := &UAPIListener{
  71  		listener: listener,
  72  		connNew:  make(chan net.Conn, 1),
  73  		connErr:  make(chan error, 1),
  74  	}
  75  
  76  	go func(l *UAPIListener) {
  77  		for {
  78  			conn, err := l.listener.Accept()
  79  			if err != nil {
  80  				l.connErr <- err
  81  				break
  82  			}
  83  			l.connNew <- conn
  84  		}
  85  	}(uapi)
  86  
  87  	return uapi, nil
  88  }
  89