summaryrefslogtreecommitdiffhomepage
path: root/tun
diff options
context:
space:
mode:
Diffstat (limited to 'tun')
-rw-r--r--tun/tun.go2
-rw-r--r--tun/tun_darwin.go41
-rw-r--r--tun/tun_freebsd.go38
-rw-r--r--tun/tun_linux.go54
-rw-r--r--tun/tun_openbsd.go37
5 files changed, 34 insertions, 138 deletions
diff --git a/tun/tun.go b/tun/tun.go
index d9c3c15..3493b48 100644
--- a/tun/tun.go
+++ b/tun/tun.go
@@ -38,4 +38,4 @@ func (tun *nativeTun) operateOnFd(fn func(fd uintptr)) {
if err != nil {
tun.errors <- fmt.Errorf("unable to control sysconn for tunfile: %s", err.Error())
}
-} \ No newline at end of file
+}
diff --git a/tun/tun_darwin.go b/tun/tun_darwin.go
index 1190a9d..8cb2981 100644
--- a/tun/tun_darwin.go
+++ b/tun/tun_darwin.go
@@ -6,11 +6,9 @@
package tun
import (
- "errors"
"fmt"
"golang.org/x/net/ipv6"
"golang.org/x/sys/unix"
- "golang.zx2c4.com/wireguard/rwcancel"
"io/ioutil"
"net"
"os"
@@ -36,7 +34,6 @@ type sockaddrCtl struct {
type nativeTun struct {
name string
tunFile *os.File
- rwcancel *rwcancel.RWCancel
events chan TUNEvent
errors chan error
routeSocket int
@@ -154,6 +151,10 @@ func CreateTUN(name string, mtu int) (TUNDevice, error) {
return nil, fmt.Errorf("SYS_CONNECT: %v", errno)
}
+ err = syscall.SetNonblock(fd, true)
+ if err != nil {
+ return nil, err
+ }
tun, err := CreateTUNFromFile(os.NewFile(uintptr(fd), ""), mtu)
if err == nil && name == "utun" {
@@ -191,14 +192,6 @@ func CreateTUNFromFile(file *os.File, mtu int) (TUNDevice, error) {
return nil, err
}
- tun.operateOnFd(func (fd uintptr) {
- tun.rwcancel, err = rwcancel.NewRWCancel(int(fd))
- })
- if err != nil {
- tun.tunFile.Close()
- return nil, err
- }
-
tun.routeSocket, err = unix.Socket(unix.AF_ROUTE, unix.SOCK_RAW, unix.AF_UNSPEC)
if err != nil {
tun.tunFile.Close()
@@ -249,7 +242,7 @@ func (tun *nativeTun) Events() chan TUNEvent {
return tun.events
}
-func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
+func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
select {
case err := <-tun.errors:
return 0, err
@@ -263,18 +256,6 @@ func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
}
}
-func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
- for {
- n, err := tun.doRead(buff, offset)
- if err == nil || !rwcancel.RetryAfterError(err) {
- return n, err
- }
- if !tun.rwcancel.ReadyRead() {
- return 0, errors.New("tun device closed")
- }
- }
-}
-
func (tun *nativeTun) Write(buff []byte, offset int) (int, error) {
// reserve space for header
@@ -299,12 +280,11 @@ func (tun *nativeTun) Write(buff []byte, offset int) (int, error) {
}
func (tun *nativeTun) Close() error {
- var err3 error
- err1 := tun.rwcancel.Cancel()
- err2 := tun.tunFile.Close()
+ var err2 error
+ err1 := tun.tunFile.Close()
if tun.routeSocket != -1 {
unix.Shutdown(tun.routeSocket, unix.SHUT_RDWR)
- err3 = unix.Close(tun.routeSocket)
+ err2 = unix.Close(tun.routeSocket)
tun.routeSocket = -1
} else if tun.events != nil {
close(tun.events)
@@ -312,10 +292,7 @@ func (tun *nativeTun) Close() error {
if err1 != nil {
return err1
}
- if err2 != nil {
- return err2
- }
- return err3
+ return err2
}
func (tun *nativeTun) setMTU(n int) error {
diff --git a/tun/tun_freebsd.go b/tun/tun_freebsd.go
index 1aec123..9e5c5ad 100644
--- a/tun/tun_freebsd.go
+++ b/tun/tun_freebsd.go
@@ -11,7 +11,6 @@ import (
"fmt"
"golang.org/x/net/ipv6"
"golang.org/x/sys/unix"
- "golang.zx2c4.com/wireguard/rwcancel"
"net"
"os"
"syscall"
@@ -52,7 +51,6 @@ type ifstat struct {
type nativeTun struct {
name string
tunFile *os.File
- rwcancel *rwcancel.RWCancel
events chan TUNEvent
errors chan error
routeSocket int
@@ -333,14 +331,6 @@ func CreateTUNFromFile(file *os.File, mtu int) (TUNDevice, error) {
return nil, err
}
- tun.operateOnFd(func(fd uintptr) {
- tun.rwcancel, err = rwcancel.NewRWCancel(int(fd))
- })
- if err != nil {
- tun.tunFile.Close()
- return nil, err
- }
-
tun.routeSocket, err = unix.Socket(unix.AF_ROUTE, unix.SOCK_RAW, unix.AF_UNSPEC)
if err != nil {
tun.tunFile.Close()
@@ -379,7 +369,7 @@ func (tun *nativeTun) Events() chan TUNEvent {
return tun.events
}
-func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
+func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
select {
case err := <-tun.errors:
return 0, err
@@ -393,18 +383,6 @@ func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
}
}
-func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
- for {
- n, err := tun.doRead(buff, offset)
- if err == nil || !rwcancel.RetryAfterError(err) {
- return n, err
- }
- if !tun.rwcancel.ReadyRead() {
- return 0, errors.New("tun device closed")
- }
- }
-}
-
func (tun *nativeTun) Write(buff []byte, offset int) (int, error) {
// reserve space for header
@@ -429,13 +407,12 @@ func (tun *nativeTun) Write(buff []byte, offset int) (int, error) {
}
func (tun *nativeTun) Close() error {
- var err4 error
- err1 := tun.rwcancel.Cancel()
- err2 := tun.tunFile.Close()
- err3 := tunDestroy(tun.name)
+ var err3 error
+ err1 := tun.tunFile.Close()
+ err2 := tunDestroy(tun.name)
if tun.routeSocket != -1 {
unix.Shutdown(tun.routeSocket, unix.SHUT_RDWR)
- err4 = unix.Close(tun.routeSocket)
+ err3 = unix.Close(tun.routeSocket)
tun.routeSocket = -1
} else if tun.events != nil {
close(tun.events)
@@ -446,10 +423,7 @@ func (tun *nativeTun) Close() error {
if err2 != nil {
return err2
}
- if err3 != nil {
- return err3
- }
- return err4
+ return err3
}
func (tun *nativeTun) setMTU(n int) error {
diff --git a/tun/tun_linux.go b/tun/tun_linux.go
index abdcce2..8dcad6b 100644
--- a/tun/tun_linux.go
+++ b/tun/tun_linux.go
@@ -31,7 +31,6 @@ const (
type nativeTun struct {
tunFile *os.File
- fdCancel *rwcancel.RWCancel
index int32 // if index
name string // name of interface
errors chan error // async error handling
@@ -307,7 +306,7 @@ func (tun *nativeTun) Write(buff []byte, offset int) (int, error) {
return tun.tunFile.Write(buff)
}
-func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
+func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
select {
case err := <-tun.errors:
return 0, err
@@ -325,18 +324,6 @@ func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
}
}
-func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
- for {
- n, err := tun.doRead(buff, offset)
- if err == nil || !rwcancel.RetryAfterError(err) {
- return n, err
- }
- if !tun.fdCancel.ReadyRead() {
- return 0, errors.New("tun device closed")
- }
- }
-}
-
func (tun *nativeTun) Events() chan TUNEvent {
return tun.events
}
@@ -352,30 +339,20 @@ func (tun *nativeTun) Close() error {
close(tun.events)
}
err2 := tun.tunFile.Close()
- err3 := tun.fdCancel.Cancel()
if err1 != nil {
return err1
}
- if err2 != nil {
- return err2
- }
- return err3
+ return err2
}
func CreateTUN(name string, mtu int) (TUNDevice, error) {
- nfd, err := unix.Open(cloneDevicePath, os.O_RDWR, 0)
- if err != nil {
- return nil, err
- }
-
- fd := os.NewFile(uintptr(nfd), cloneDevicePath)
+ tunFile, err := os.OpenFile(cloneDevicePath, os.O_RDWR, 0)
if err != nil {
return nil, err
}
// create new device
-
var ifr [ifReqSize]byte
var flags uint16 = unix.IFF_TUN // | unix.IFF_NO_PI (disabled for TUN status hack)
nameBytes := []byte(name)
@@ -385,17 +362,20 @@ func CreateTUN(name string, mtu int) (TUNDevice, error) {
copy(ifr[:], nameBytes)
*(*uint16)(unsafe.Pointer(&ifr[unix.IFNAMSIZ])) = flags
- _, _, errno := unix.Syscall(
- unix.SYS_IOCTL,
- nfd,
- uintptr(unix.TUNSETIFF),
- uintptr(unsafe.Pointer(&ifr[0])),
- )
+ var errno syscall.Errno
+ (&nativeTun{tunFile: tunFile}).operateOnFd(func(fd uintptr) {
+ _, _, errno = unix.Syscall(
+ unix.SYS_IOCTL,
+ fd,
+ uintptr(unix.TUNSETIFF),
+ uintptr(unsafe.Pointer(&ifr[0])),
+ )
+ })
if errno != 0 {
return nil, errno
}
- return CreateTUNFromFile(fd, mtu)
+ return CreateTUNFromFile(tunFile, mtu)
}
func CreateTUNFromFile(file *os.File, mtu int) (TUNDevice, error) {
@@ -408,14 +388,6 @@ func CreateTUNFromFile(file *os.File, mtu int) (TUNDevice, error) {
}
var err error
- tun.operateOnFd(func(fd uintptr) {
- tun.fdCancel, err = rwcancel.NewRWCancel(int(fd))
- })
- if err != nil {
- tun.tunFile.Close()
- return nil, err
- }
-
_, err = tun.Name()
if err != nil {
tun.tunFile.Close()
diff --git a/tun/tun_openbsd.go b/tun/tun_openbsd.go
index b10c460..4e740c5 100644
--- a/tun/tun_openbsd.go
+++ b/tun/tun_openbsd.go
@@ -6,11 +6,9 @@
package tun
import (
- "errors"
"fmt"
"golang.org/x/net/ipv6"
"golang.org/x/sys/unix"
- "golang.zx2c4.com/wireguard/rwcancel"
"io/ioutil"
"net"
"os"
@@ -30,7 +28,6 @@ const _TUNSIFMODE = 0x8004745d
type nativeTun struct {
name string
tunFile *os.File
- rwcancel *rwcancel.RWCancel
events chan TUNEvent
errors chan error
routeSocket int
@@ -167,14 +164,6 @@ func CreateTUNFromFile(file *os.File, mtu int) (TUNDevice, error) {
return nil, err
}
- tun.operateOnFd(func(fd uintptr) {
- tun.rwcancel, err = rwcancel.NewRWCancel(int(fd))
- })
- if err != nil {
- tun.tunFile.Close()
- return nil, err
- }
-
tun.routeSocket, err = unix.Socket(unix.AF_ROUTE, unix.SOCK_RAW, unix.AF_UNSPEC)
if err != nil {
tun.tunFile.Close()
@@ -211,7 +200,7 @@ func (tun *nativeTun) Events() chan TUNEvent {
return tun.events
}
-func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
+func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
select {
case err := <-tun.errors:
return 0, err
@@ -225,18 +214,6 @@ func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
}
}
-func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
- for {
- n, err := tun.doRead(buff, offset)
- if err == nil || !rwcancel.RetryAfterError(err) {
- return n, err
- }
- if !tun.rwcancel.ReadyRead() {
- return 0, errors.New("tun device closed")
- }
- }
-}
-
func (tun *nativeTun) Write(buff []byte, offset int) (int, error) {
// reserve space for header
@@ -261,12 +238,11 @@ func (tun *nativeTun) Write(buff []byte, offset int) (int, error) {
}
func (tun *nativeTun) Close() error {
- var err3 error
- err1 := tun.rwcancel.Cancel()
- err2 := tun.tunFile.Close()
+ var err2 error
+ err1 := tun.tunFile.Close()
if tun.routeSocket != -1 {
unix.Shutdown(tun.routeSocket, unix.SHUT_RDWR)
- err3 = unix.Close(tun.routeSocket)
+ err2 = unix.Close(tun.routeSocket)
tun.routeSocket = -1
} else if tun.events != nil {
close(tun.events)
@@ -274,10 +250,7 @@ func (tun *nativeTun) Close() error {
if err1 != nil {
return err1
}
- if err2 != nil {
- return err2
- }
- return err3
+ return err2
}
func (tun *nativeTun) setMTU(n int) error {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 08:56:27 +0000