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namedpipe: rename from winpipe to keep in sync with CL299009

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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2021-10-30 02:39:56 +02:00
parent eb6302c7eb
commit c07dd60cdb
7 changed files with 132 additions and 475 deletions
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14
ipc/winpipe/file.go → ipc/namedpipe/file.go
View File

@ -1,12 +1,12 @@
// Copyright 2021 The Go Authors. All rights reserved.
// Copyright 2015 Microsoft
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build windows
// +build windows
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2005 Microsoft
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package winpipe
package namedpipe
import (
"io"

92
ipc/winpipe/winpipe.go → ipc/namedpipe/namedpipe.go
View File

@ -1,13 +1,13 @@
// Copyright 2021 The Go Authors. All rights reserved.
// Copyright 2015 Microsoft
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build windows
// +build windows
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2005 Microsoft
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
// Package winpipe implements a net.Conn and net.Listener around Windows named pipes.
package winpipe
// Package namedpipe implements a net.Conn and net.Listener around Windows named pipes.
package namedpipe
import (
"context"
@ -15,6 +15,7 @@ import (
"net"
"os"
"runtime"
"sync/atomic"
"time"
"unsafe"
@ -28,7 +29,7 @@ type pipe struct {
type messageBytePipe struct {
pipe
writeClosed bool
writeClosed int32
readEOF bool
}
@ -50,25 +51,26 @@ func (f *pipe) SetDeadline(t time.Time) error {
// CloseWrite closes the write side of a message pipe in byte mode.
func (f *messageBytePipe) CloseWrite() error {
if f.writeClosed {
if !atomic.CompareAndSwapInt32(&f.writeClosed, 0, 1) {
return io.ErrClosedPipe
}
err := f.file.Flush()
if err != nil {
atomic.StoreInt32(&f.writeClosed, 0)
return err
}
_, err = f.file.Write(nil)
if err != nil {
atomic.StoreInt32(&f.writeClosed, 0)
return err
}
f.writeClosed = true
return nil
}
// Write writes bytes to a message pipe in byte mode. Zero-byte writes are ignored, since
// they are used to implement CloseWrite.
func (f *messageBytePipe) Write(b []byte) (int, error) {
if f.writeClosed {
if atomic.LoadInt32(&f.writeClosed) != 0 {
return 0, io.ErrClosedPipe
}
if len(b) == 0 {
@ -142,30 +144,24 @@ type DialConfig struct {
ExpectedOwner *windows.SID // If non-nil, the pipe is verified to be owned by this SID.
}
// Dial connects to the specified named pipe by path, timing out if the connection
// takes longer than the specified duration. If timeout is nil, then we use
// a default timeout of 2 seconds.
func Dial(path string, timeout *time.Duration, config *DialConfig) (net.Conn, error) {
var absTimeout time.Time
if timeout != nil {
absTimeout = time.Now().Add(*timeout)
} else {
absTimeout = time.Now().Add(2 * time.Second)
// DialTimeout connects to the specified named pipe by path, timing out if the
// connection takes longer than the specified duration. If timeout is zero, then
// we use a default timeout of 2 seconds.
func (config *DialConfig) DialTimeout(path string, timeout time.Duration) (net.Conn, error) {
if timeout == 0 {
timeout = time.Second * 2
}
absTimeout := time.Now().Add(timeout)
ctx, _ := context.WithDeadline(context.Background(), absTimeout)
conn, err := DialContext(ctx, path, config)
conn, err := config.DialContext(ctx, path)
if err == context.DeadlineExceeded {
return nil, os.ErrDeadlineExceeded
}
return conn, err
}
// DialContext attempts to connect to the specified named pipe by path
// cancellation or timeout.
func DialContext(ctx context.Context, path string, config *DialConfig) (net.Conn, error) {
if config == nil {
config = &DialConfig{}
}
// DialContext attempts to connect to the specified named pipe by path.
func (config *DialConfig) DialContext(ctx context.Context, path string) (net.Conn, error) {
var err error
var h windows.Handle
h, err = tryDialPipe(ctx, &path)
@ -213,6 +209,18 @@ func DialContext(ctx context.Context, path string, config *DialConfig) (net.Conn
return &pipe{file: f, path: path}, nil
}
var defaultDialer DialConfig
// DialTimeout calls DialConfig.DialTimeout using an empty configuration.
func DialTimeout(path string, timeout time.Duration) (net.Conn, error) {
return defaultDialer.DialTimeout(path, timeout)
}
// DialContext calls DialConfig.DialContext using an empty configuration.
func DialContext(ctx context.Context, path string) (net.Conn, error) {
return defaultDialer.DialContext(ctx, path)
}
type acceptResponse struct {
f *file
err error
@ -222,12 +230,12 @@ type pipeListener struct {
firstHandle windows.Handle
path string
config ListenConfig
acceptCh chan (chan acceptResponse)
acceptCh chan chan acceptResponse
closeCh chan int
doneCh chan int
}
func makeServerPipeHandle(path string, sd *windows.SECURITY_DESCRIPTOR, c *ListenConfig, first bool) (windows.Handle, error) {
func makeServerPipeHandle(path string, sd *windows.SECURITY_DESCRIPTOR, c *ListenConfig, isFirstPipe bool) (windows.Handle, error) {
path16, err := windows.UTF16PtrFromString(path)
if err != nil {
return 0, &os.PathError{Op: "open", Path: path, Err: err}
@ -247,7 +255,7 @@ func makeServerPipeHandle(path string, sd *windows.SECURITY_DESCRIPTOR, c *Liste
oa.ObjectName = &ntPath
// The security descriptor is only needed for the first pipe.
if first {
if isFirstPipe {
if sd != nil {
oa.SecurityDescriptor = sd
} else {
@ -257,7 +265,7 @@ func makeServerPipeHandle(path string, sd *windows.SECURITY_DESCRIPTOR, c *Liste
return 0, err
}
defer windows.LocalFree(windows.Handle(unsafe.Pointer(acl)))
sd, err := windows.NewSecurityDescriptor()
sd, err = windows.NewSecurityDescriptor()
if err != nil {
return 0, err
}
@ -275,11 +283,11 @@ func makeServerPipeHandle(path string, sd *windows.SECURITY_DESCRIPTOR, c *Liste
disposition := uint32(windows.FILE_OPEN)
access := uint32(windows.GENERIC_READ | windows.GENERIC_WRITE | windows.SYNCHRONIZE)
if first {
if isFirstPipe {
disposition = windows.FILE_CREATE
// By not asking for read or write access, the named pipe file system
// will put this pipe into an initially disconnected state, blocking
// client connections until the next call with first == false.
// client connections until the next call with isFirstPipe == false.
access = windows.SYNCHRONIZE
}
@ -395,10 +403,7 @@ type ListenConfig struct {
// Listen creates a listener on a Windows named pipe path,such as \\.\pipe\mypipe.
// The pipe must not already exist.
func Listen(path string, c *ListenConfig) (net.Listener, error) {
if c == nil {
c = &ListenConfig{}
}
func (c *ListenConfig) Listen(path string) (net.Listener, error) {
h, err := makeServerPipeHandle(path, c.SecurityDescriptor, c, true)
if err != nil {
return nil, err
@ -407,12 +412,12 @@ func Listen(path string, c *ListenConfig) (net.Listener, error) {
firstHandle: h,
path: path,
config: *c,
acceptCh: make(chan (chan acceptResponse)),
acceptCh: make(chan chan acceptResponse),
closeCh: make(chan int),
doneCh: make(chan int),
}
// The first connection is swallowed on Windows 7 & 8, so synthesize it.
if maj, _, _ := windows.RtlGetNtVersionNumbers(); maj <= 8 {
if maj, min, _ := windows.RtlGetNtVersionNumbers(); maj < 6 || (maj == 6 && min < 4) {
path16, err := windows.UTF16PtrFromString(path)
if err == nil {
h, err = windows.CreateFile(path16, 0, 0, nil, windows.OPEN_EXISTING, windows.SECURITY_SQOS_PRESENT|windows.SECURITY_ANONYMOUS, 0)
@ -425,6 +430,13 @@ func Listen(path string, c *ListenConfig) (net.Listener, error) {
return l, nil
}
var defaultListener ListenConfig
// Listen calls ListenConfig.Listen using an empty configuration.
func Listen(path string) (net.Listener, error) {
return defaultListener.Listen(path)
}
func connectPipe(p *file) error {
c, err := p.prepareIo()
if err != nil {

125
ipc/winpipe/winpipe_test.go → ipc/namedpipe/namedpipe_test.go
View File

@ -1,12 +1,12 @@
// Copyright 2021 The Go Authors. All rights reserved.
// Copyright 2015 Microsoft
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build windows
// +build windows
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2005 Microsoft
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package winpipe_test
package namedpipe_test
import (
"bufio"
@ -22,7 +22,7 @@ import (
"time"
"golang.org/x/sys/windows"
"golang.zx2c4.com/wireguard/ipc/winpipe"
"golang.zx2c4.com/wireguard/ipc/namedpipe"
)
func randomPipePath() string {
@ -30,7 +30,7 @@ func randomPipePath() string {
if err != nil {
panic(err)
}
return `\\.\PIPE\go-winpipe-test-` + guid.String()
return `\\.\PIPE\go-namedpipe-test-` + guid.String()
}
func TestPingPong(t *testing.T) {
@ -39,7 +39,7 @@ func TestPingPong(t *testing.T) {
pong = 24
)
pipePath := randomPipePath()
listener, err := winpipe.Listen(pipePath, nil)
listener, err := namedpipe.Listen(pipePath)
if err != nil {
t.Fatalf("unable to listen on pipe: %v", err)
}
@ -64,11 +64,12 @@ func TestPingPong(t *testing.T) {
t.Fatalf("unable to write pong to pipe: %v", err)
}
}()
client, err := winpipe.Dial(pipePath, nil, nil)
client, err := namedpipe.DialTimeout(pipePath, time.Duration(0))
if err != nil {
t.Fatalf("unable to dial pipe: %v", err)
}
defer client.Close()
client.SetDeadline(time.Now().Add(time.Second * 5))
var data [1]byte
data[0] = ping
_, err = client.Write(data[:])
@ -85,7 +86,7 @@ func TestPingPong(t *testing.T) {
}
func TestDialUnknownFailsImmediately(t *testing.T) {
_, err := winpipe.Dial(randomPipePath(), nil, nil)
_, err := namedpipe.DialTimeout(randomPipePath(), time.Duration(0))
if !errors.Is(err, syscall.ENOENT) {
t.Fatalf("expected ENOENT got %v", err)
}
@ -93,13 +94,15 @@ func TestDialUnknownFailsImmediately(t *testing.T) {
func TestDialListenerTimesOut(t *testing.T) {
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, nil)
l, err := namedpipe.Listen(pipePath)
if err != nil {
t.Fatal(err)
}
defer l.Close()
d := 10 * time.Millisecond
_, err = winpipe.Dial(pipePath, &d, nil)
pipe, err := namedpipe.DialTimeout(pipePath, 10*time.Millisecond)
if err == nil {
pipe.Close()
}
if err != os.ErrDeadlineExceeded {
t.Fatalf("expected os.ErrDeadlineExceeded, got %v", err)
}
@ -107,14 +110,17 @@ func TestDialListenerTimesOut(t *testing.T) {
func TestDialContextListenerTimesOut(t *testing.T) {
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, nil)
l, err := namedpipe.Listen(pipePath)
if err != nil {
t.Fatal(err)
}
defer l.Close()
d := 10 * time.Millisecond
ctx, _ := context.WithTimeout(context.Background(), d)
_, err = winpipe.DialContext(ctx, pipePath, nil)
pipe, err := namedpipe.DialContext(ctx, pipePath)
if err == nil {
pipe.Close()
}
if err != context.DeadlineExceeded {
t.Fatalf("expected context.DeadlineExceeded, got %v", err)
}
@ -123,14 +129,14 @@ func TestDialContextListenerTimesOut(t *testing.T) {
func TestDialListenerGetsCancelled(t *testing.T) {
pipePath := randomPipePath()
ctx, cancel := context.WithCancel(context.Background())
l, err := winpipe.Listen(pipePath, nil)
l, err := namedpipe.Listen(pipePath)
if err != nil {
t.Fatal(err)
}
ch := make(chan error)
defer l.Close()
ch := make(chan error)
go func(ctx context.Context, ch chan error) {
_, err := winpipe.DialContext(ctx, pipePath, nil)
_, err := namedpipe.DialContext(ctx, pipePath)
ch <- err
}(ctx, ch)
time.Sleep(time.Millisecond * 30)
@ -147,23 +153,28 @@ func TestDialAccessDeniedWithRestrictedSD(t *testing.T) {
}
pipePath := randomPipePath()
sd, _ := windows.SecurityDescriptorFromString("D:")
c := winpipe.ListenConfig{
l, err := (&namedpipe.ListenConfig{
SecurityDescriptor: sd,
}
l, err := winpipe.Listen(pipePath, &c)
}).Listen(pipePath)
if err != nil {
t.Fatal(err)
}
defer l.Close()
_, err = winpipe.Dial(pipePath, nil, nil)
pipe, err := namedpipe.DialTimeout(pipePath, time.Duration(0))
if err == nil {
pipe.Close()
}
if !errors.Is(err, windows.ERROR_ACCESS_DENIED) {
t.Fatalf("expected ERROR_ACCESS_DENIED, got %v", err)
}
}
func getConnection(cfg *winpipe.ListenConfig) (client net.Conn, server net.Conn, err error) {
func getConnection(cfg *namedpipe.ListenConfig) (client net.Conn, server net.Conn, err error) {
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, cfg)
if cfg == nil {
cfg = &namedpipe.ListenConfig{}
}
l, err := cfg.Listen(pipePath)
if err != nil {
return
}
@ -179,7 +190,7 @@ func getConnection(cfg *winpipe.ListenConfig) (client net.Conn, server net.Conn,
ch <- response{c, err}
}()
c, err := winpipe.Dial(pipePath, nil, nil)
c, err := namedpipe.DialTimeout(pipePath, time.Duration(0))
if err != nil {
return
}
@ -236,7 +247,7 @@ func server(l net.Listener, ch chan int) {
func TestFullListenDialReadWrite(t *testing.T) {
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, nil)
l, err := namedpipe.Listen(pipePath)
if err != nil {
t.Fatal(err)
}
@ -245,7 +256,7 @@ func TestFullListenDialReadWrite(t *testing.T) {
ch := make(chan int)
go server(l, ch)
c, err := winpipe.Dial(pipePath, nil, nil)
c, err := namedpipe.DialTimeout(pipePath, time.Duration(0))
if err != nil {
t.Fatal(err)
}
@ -275,7 +286,7 @@ func TestFullListenDialReadWrite(t *testing.T) {
func TestCloseAbortsListen(t *testing.T) {
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, nil)
l, err := namedpipe.Listen(pipePath)
if err != nil {
t.Fatal(err)
}
@ -328,7 +339,7 @@ func TestCloseServerEOFClient(t *testing.T) {
}
func TestCloseWriteEOF(t *testing.T) {
cfg := &winpipe.ListenConfig{
cfg := &namedpipe.ListenConfig{
MessageMode: true,
}
c, s, err := getConnection(cfg)
@ -356,7 +367,7 @@ func TestCloseWriteEOF(t *testing.T) {
func TestAcceptAfterCloseFails(t *testing.T) {
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, nil)
l, err := namedpipe.Listen(pipePath)
if err != nil {
t.Fatal(err)
}
@ -369,12 +380,15 @@ func TestAcceptAfterCloseFails(t *testing.T) {
func TestDialTimesOutByDefault(t *testing.T) {
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, nil)
l, err := namedpipe.Listen(pipePath)
if err != nil {
t.Fatal(err)
}
defer l.Close()
_, err = winpipe.Dial(pipePath, nil, nil)
pipe, err := namedpipe.DialTimeout(pipePath, time.Duration(0)) // Should timeout after 2 seconds.
if err == nil {
pipe.Close()
}
if err != os.ErrDeadlineExceeded {
t.Fatalf("expected os.ErrDeadlineExceeded, got %v", err)
}
@ -382,7 +396,7 @@ func TestDialTimesOutByDefault(t *testing.T) {
func TestTimeoutPendingRead(t *testing.T) {
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, nil)
l, err := namedpipe.Listen(pipePath)
if err != nil {
t.Fatal(err)
}
@ -400,7 +414,7 @@ func TestTimeoutPendingRead(t *testing.T) {
close(serverDone)
}()
client, err := winpipe.Dial(pipePath, nil, nil)
client, err := namedpipe.DialTimeout(pipePath, time.Duration(0))
if err != nil {
t.Fatal(err)
}
@ -430,7 +444,7 @@ func TestTimeoutPendingRead(t *testing.T) {
func TestTimeoutPendingWrite(t *testing.T) {
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, nil)
l, err := namedpipe.Listen(pipePath)
if err != nil {
t.Fatal(err)
}
@ -448,7 +462,7 @@ func TestTimeoutPendingWrite(t *testing.T) {
close(serverDone)
}()
client, err := winpipe.Dial(pipePath, nil, nil)
client, err := namedpipe.DialTimeout(pipePath, time.Duration(0))
if err != nil {
t.Fatal(err)
}
@ -480,13 +494,12 @@ type CloseWriter interface {
}
func TestEchoWithMessaging(t *testing.T) {
c := winpipe.ListenConfig{
pipePath := randomPipePath()
l, err := (&namedpipe.ListenConfig{
MessageMode: true, // Use message mode so that CloseWrite() is supported
InputBufferSize: 65536, // Use 64KB buffers to improve performance
OutputBufferSize: 65536,
}
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, &c)
}).Listen(pipePath)
if err != nil {
t.Fatal(err)
}
@ -496,19 +509,21 @@ func TestEchoWithMessaging(t *testing.T) {
clientDone := make(chan bool)
go func() {
// server echo
conn, e := l.Accept()
if e != nil {
t.Fatal(e)
conn, err := l.Accept()
if err != nil {
t.Fatal(err)
}
defer conn.Close()
time.Sleep(500 * time.Millisecond) // make *sure* we don't begin to read before eof signal is sent
io.Copy(conn, conn)
_, err = io.Copy(conn, conn)
if err != nil {
t.Fatal(err)
}
conn.(CloseWriter).CloseWrite()
close(listenerDone)
}()
timeout := 1 * time.Second
client, err := winpipe.Dial(pipePath, &timeout, nil)
client, err := namedpipe.DialTimeout(pipePath, time.Second)
if err != nil {
t.Fatal(err)
}
@ -521,7 +536,7 @@ func TestEchoWithMessaging(t *testing.T) {
if e != nil {
t.Fatal(e)
}
if n != 2 {
if n != 2 || bytes[0] != 0 || bytes[1] != 1 {
t.Fatalf("expected 2 bytes, got %v", n)
}
close(clientDone)
@ -545,7 +560,7 @@ func TestEchoWithMessaging(t *testing.T) {
func TestConnectRace(t *testing.T) {
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, nil)
l, err := namedpipe.Listen(pipePath)
if err != nil {
t.Fatal(err)
}
@ -565,7 +580,7 @@ func TestConnectRace(t *testing.T) {
}()
for i := 0; i < 1000; i++ {
c, err := winpipe.Dial(pipePath, nil, nil)
c, err := namedpipe.DialTimeout(pipePath, time.Duration(0))
if err != nil {
t.Fatal(err)
}
@ -580,7 +595,7 @@ func TestMessageReadMode(t *testing.T) {
var wg sync.WaitGroup
defer wg.Wait()
pipePath := randomPipePath()
l, err := winpipe.Listen(pipePath, &winpipe.ListenConfig{MessageMode: true})
l, err := (&namedpipe.ListenConfig{MessageMode: true}).Listen(pipePath)
if err != nil {
t.Fatal(err)
}
@ -602,7 +617,7 @@ func TestMessageReadMode(t *testing.T) {
s.Close()
}()
c, err := winpipe.Dial(pipePath, nil, nil)
c, err := namedpipe.DialTimeout(pipePath, time.Duration(0))
if err != nil {
t.Fatal(err)
}
@ -643,13 +658,13 @@ func TestListenConnectRace(t *testing.T) {
var wg sync.WaitGroup
wg.Add(1)
go func() {
c, err := winpipe.Dial(pipePath, nil, nil)
c, err := namedpipe.DialTimeout(pipePath, time.Duration(0))
if err == nil {
c.Close()
}
wg.Done()
}()
s, err := winpipe.Listen(pipePath, nil)
s, err := namedpipe.Listen(pipePath)
if err != nil {
t.Error(i, err)
} else {

8
ipc/uapi_windows.go
View File

@ -9,8 +9,7 @@ import (
"net"
"golang.org/x/sys/windows"
"golang.zx2c4.com/wireguard/ipc/winpipe"
"golang.zx2c4.com/wireguard/ipc/namedpipe"
)
// TODO: replace these with actual standard windows error numbers from the win package
@ -61,10 +60,9 @@ func init() {
}
func UAPIListen(name string) (net.Listener, error) {
config := winpipe.ListenConfig{
listener, err := (&namedpipe.ListenConfig{
SecurityDescriptor: UAPISecurityDescriptor,
}
listener, err := winpipe.Listen(`\\.\pipe\ProtectedPrefix\Administrators\WireGuard\`+name, &config)
}).Listen(`\\.\pipe\ProtectedPrefix\Administrators\WireGuard\` + name)
if err != nil {
return nil, err
}

128
tun/wintun/dll_windows.go
View File

@ -1,128 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package wintun
import (
"fmt"
"sync"
"sync/atomic"
"unsafe"
"golang.org/x/sys/windows"
)
func newLazyDLL(name string, onLoad func(d *lazyDLL)) *lazyDLL {
return &lazyDLL{Name: name, onLoad: onLoad}
}
func (d *lazyDLL) NewProc(name string) *lazyProc {
return &lazyProc{dll: d, Name: name}
}
type lazyProc struct {
Name string
mu sync.Mutex
dll *lazyDLL
addr uintptr
}
func (p *lazyProc) Find() error {
if atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&p.addr))) != nil {
return nil
}
p.mu.Lock()
defer p.mu.Unlock()
if p.addr != 0 {
return nil
}
err := p.dll.Load()
if err != nil {
return fmt.Errorf("Error loading %v DLL: %w", p.dll.Name, err)
}
addr, err := p.nameToAddr()
if err != nil {
return fmt.Errorf("Error getting %v address: %w", p.Name, err)
}
atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(&p.addr)), unsafe.Pointer(addr))
return nil
}
func (p *lazyProc) Addr() uintptr {
err := p.Find()
if err != nil {
panic(err)
}
return p.addr
}
type lazyDLL struct {
Name string
mu sync.Mutex
module windows.Handle
onLoad func(d *lazyDLL)
}
func (d *lazyDLL) Load() error {
if atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&d.module))) != nil {
return nil
}
d.mu.Lock()
defer d.mu.Unlock()
if d.module != 0 {
return nil
}
const (
LOAD_LIBRARY_SEARCH_APPLICATION_DIR = 0x00000200
LOAD_LIBRARY_SEARCH_SYSTEM32 = 0x00000800
)
module, err := windows.LoadLibraryEx(d.Name, 0, LOAD_LIBRARY_SEARCH_APPLICATION_DIR|LOAD_LIBRARY_SEARCH_SYSTEM32)
if err != nil {
return fmt.Errorf("Unable to load library: %w", err)
}
atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(&d.module)), unsafe.Pointer(module))
if d.onLoad != nil {
d.onLoad(d)
}
return nil
}
func (p *lazyProc) nameToAddr() (uintptr, error) {
return windows.GetProcAddress(p.dll.module, p.Name)
}
// Version returns the version of the Wintun DLL.
func Version() string {
if modwintun.Load() != nil {
return "unknown"
}
resInfo, err := windows.FindResource(modwintun.module, windows.ResourceID(1), windows.RT_VERSION)
if err != nil {
return "unknown"
}
data, err := windows.LoadResourceData(modwintun.module, resInfo)
if err != nil {
return "unknown"
}
var fixedInfo *windows.VS_FIXEDFILEINFO
fixedInfoLen := uint32(unsafe.Sizeof(*fixedInfo))
err = windows.VerQueryValue(unsafe.Pointer(&data[0]), `\`, unsafe.Pointer(&fixedInfo), &fixedInfoLen)
if err != nil {
return "unknown"
}
version := fmt.Sprintf("%d.%d", (fixedInfo.FileVersionMS>>16)&0xff, (fixedInfo.FileVersionMS>>0)&0xff)
if nextNibble := (fixedInfo.FileVersionLS >> 16) & 0xff; nextNibble != 0 {
version += fmt.Sprintf(".%d", nextNibble)
}
if nextNibble := (fixedInfo.FileVersionLS >> 0) & 0xff; nextNibble != 0 {
version += fmt.Sprintf(".%d", nextNibble)
}
return version
}

90
tun/wintun/session_windows.go
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@ -1,90 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package wintun
import (
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
type Session struct {
handle uintptr
}
const (
PacketSizeMax = 0xffff // Maximum packet size
RingCapacityMin = 0x20000 // Minimum ring capacity (128 kiB)
RingCapacityMax = 0x4000000 // Maximum ring capacity (64 MiB)
)
// Packet with data
type Packet struct {
Next *Packet // Pointer to next packet in queue
Size uint32 // Size of packet (max WINTUN_MAX_IP_PACKET_SIZE)
Data *[PacketSizeMax]byte // Pointer to layer 3 IPv4 or IPv6 packet
}
var (
procWintunAllocateSendPacket = modwintun.NewProc("WintunAllocateSendPacket")
procWintunEndSession = modwintun.NewProc("WintunEndSession")
procWintunGetReadWaitEvent = modwintun.NewProc("WintunGetReadWaitEvent")
procWintunReceivePacket = modwintun.NewProc("WintunReceivePacket")
procWintunReleaseReceivePacket = modwintun.NewProc("WintunReleaseReceivePacket")
procWintunSendPacket = modwintun.NewProc("WintunSendPacket")
procWintunStartSession = modwintun.NewProc("WintunStartSession")
)
func (wintun *Adapter) StartSession(capacity uint32) (session Session, err error) {
r0, _, e1 := syscall.Syscall(procWintunStartSession.Addr(), 2, uintptr(wintun.handle), uintptr(capacity), 0)
if r0 == 0 {
err = e1
} else {
session = Session{r0}
}
return
}
func (session Session) End() {
syscall.Syscall(procWintunEndSession.Addr(), 1, session.handle, 0, 0)
session.handle = 0
}
func (session Session) ReadWaitEvent() (handle windows.Handle) {
r0, _, _ := syscall.Syscall(procWintunGetReadWaitEvent.Addr(), 1, session.handle, 0, 0)
handle = windows.Handle(r0)
return
}
func (session Session) ReceivePacket() (packet []byte, err error) {
var packetSize uint32
r0, _, e1 := syscall.Syscall(procWintunReceivePacket.Addr(), 2, session.handle, uintptr(unsafe.Pointer(&packetSize)), 0)
if r0 == 0 {
err = e1
return
}
packet = unsafe.Slice((*byte)(unsafe.Pointer(r0)), packetSize)
return
}
func (session Session) ReleaseReceivePacket(packet []byte) {
syscall.Syscall(procWintunReleaseReceivePacket.Addr(), 2, session.handle, uintptr(unsafe.Pointer(&packet[0])), 0)
}
func (session Session) AllocateSendPacket(packetSize int) (packet []byte, err error) {
r0, _, e1 := syscall.Syscall(procWintunAllocateSendPacket.Addr(), 2, session.handle, uintptr(packetSize), 0)
if r0 == 0 {
err = e1
return
}
packet = unsafe.Slice((*byte)(unsafe.Pointer(r0)), packetSize)
return
}
func (session Session) SendPacket(packet []byte) {
syscall.Syscall(procWintunSendPacket.Addr(), 2, session.handle, uintptr(unsafe.Pointer(&packet[0])), 0)
}

150
tun/wintun/wintun_windows.go
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@ -1,150 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package wintun
import (
"log"
"runtime"
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
type loggerLevel int
const (
logInfo loggerLevel = iota
logWarn
logErr
)
const AdapterNameMax = 128
type Adapter struct {
handle uintptr
}
var (
modwintun = newLazyDLL("wintun.dll", setupLogger)
procWintunCreateAdapter = modwintun.NewProc("WintunCreateAdapter")
procWintunOpenAdapter = modwintun.NewProc("WintunOpenAdapter")
procWintunCloseAdapter = modwintun.NewProc("WintunCloseAdapter")
procWintunDeleteDriver = modwintun.NewProc("WintunDeleteDriver")
procWintunGetAdapterLUID = modwintun.NewProc("WintunGetAdapterLUID")
procWintunGetRunningDriverVersion = modwintun.NewProc("WintunGetRunningDriverVersion")
)
type TimestampedWriter interface {
WriteWithTimestamp(p []byte, ts int64) (n int, err error)
}
func logMessage(level loggerLevel, timestamp uint64, msg *uint16) int {
if tw, ok := log.Default().Writer().(TimestampedWriter); ok {
tw.WriteWithTimestamp([]byte(log.Default().Prefix()+windows.UTF16PtrToString(msg)), (int64(timestamp)-116444736000000000)*100)
} else {
log.Println(windows.UTF16PtrToString(msg))
}
return 0
}
func setupLogger(dll *lazyDLL) {
var callback uintptr
if runtime.GOARCH == "386" {
callback = windows.NewCallback(func(level loggerLevel, timestampLow, timestampHigh uint32, msg *uint16) int {
return logMessage(level, uint64(timestampHigh)<<32|uint64(timestampLow), msg)
})
} else if runtime.GOARCH == "arm" {
callback = windows.NewCallback(func(level loggerLevel, _, timestampLow, timestampHigh uint32, msg *uint16) int {
return logMessage(level, uint64(timestampHigh)<<32|uint64(timestampLow), msg)
})
} else if runtime.GOARCH == "amd64" || runtime.GOARCH == "arm64" {
callback = windows.NewCallback(logMessage)
}
syscall.Syscall(dll.NewProc("WintunSetLogger").Addr(), 1, callback, 0, 0)
}
func closeAdapter(wintun *Adapter) {
syscall.Syscall(procWintunCloseAdapter.Addr(), 1, wintun.handle, 0, 0)
}
// CreateAdapter creates a Wintun adapter. name is the cosmetic name of the adapter.
// tunnelType represents the type of adapter and should be "Wintun". requestedGUID is
// the GUID of the created network adapter, which then influences NLA generation
// deterministically. If it is set to nil, the GUID is chosen by the system at random,
// and hence a new NLA entry is created for each new adapter.
func CreateAdapter(name string, tunnelType string, requestedGUID *windows.GUID) (wintun *Adapter, err error) {
var name16 *uint16
name16, err = windows.UTF16PtrFromString(name)
if err != nil {
return
}
var tunnelType16 *uint16
tunnelType16, err = windows.UTF16PtrFromString(tunnelType)
if err != nil {
return
}
r0, _, e1 := syscall.Syscall(procWintunCreateAdapter.Addr(), 3, uintptr(unsafe.Pointer(name16)), uintptr(unsafe.Pointer(tunnelType16)), uintptr(unsafe.Pointer(requestedGUID)))
if r0 == 0 {
err = e1
return
}
wintun = &Adapter{handle: r0}
runtime.SetFinalizer(wintun, closeAdapter)
return
}
// OpenAdapter opens an existing Wintun adapter by name.
func OpenAdapter(name string) (wintun *Adapter, err error) {
var name16 *uint16
name16, err = windows.UTF16PtrFromString(name)
if err != nil {
return
}
r0, _, e1 := syscall.Syscall(procWintunOpenAdapter.Addr(), 1, uintptr(unsafe.Pointer(name16)), 0, 0)
if r0 == 0 {
err = e1
return
}
wintun = &Adapter{handle: r0}
runtime.SetFinalizer(wintun, closeAdapter)
return
}
// Close closes a Wintun adapter.
func (wintun *Adapter) Close() (err error) {
runtime.SetFinalizer(wintun, nil)
r1, _, e1 := syscall.Syscall(procWintunCloseAdapter.Addr(), 1, wintun.handle, 0, 0)
if r1 == 0 {
err = e1
}
return
}
// Uninstall removes the driver from the system if no drivers are currently in use.
func Uninstall() (err error) {
r1, _, e1 := syscall.Syscall(procWintunDeleteDriver.Addr(), 0, 0, 0, 0)
if r1 == 0 {
err = e1
}
return
}
// RunningVersion returns the version of the loaded driver.
func RunningVersion() (version uint32, err error) {
r0, _, e1 := syscall.Syscall(procWintunGetRunningDriverVersion.Addr(), 0, 0, 0, 0)
version = uint32(r0)
if version == 0 {
err = e1
}
return
}
// LUID returns the LUID of the adapter.
func (wintun *Adapter) LUID() (luid uint64) {
syscall.Syscall(procWintunGetAdapterLUID.Addr(), 2, uintptr(wintun.handle), uintptr(unsafe.Pointer(&luid)), 0)
return
}