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Add create tun from file descriptor

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世界 2023-02-26 16:58:07 +08:00
parent 8cb63dbb54
commit 0cdb0eed74
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GPG key ID: CD109927C34A63C4
8 changed files with 67 additions and 49 deletions
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36
tun_darwin.go
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@ -28,23 +28,29 @@ type NativeTun struct {
inet6Address string
}
func Open(options Options) (Tun, error) {
ifIndex := -1
_, err := fmt.Sscanf(options.Name, "utun%d", &ifIndex)
if err != nil {
return nil, E.New("bad tun name: ", options.Name)
func New(options Options) (Tun, error) {
var tunFd int
if options.FileDescriptor == 0 {
ifIndex := -1
_, err := fmt.Sscanf(options.Name, "utun%d", &ifIndex)
if err != nil {
return nil, E.New("bad tun name: ", options.Name)
}
tunFd, err = unix.Socket(unix.AF_SYSTEM, unix.SOCK_DGRAM, 2)
if err != nil {
return nil, err
}
err = configure(tunFd, ifIndex, options.Name, options)
if err != nil {
unix.Close(tunFd)
return nil, err
}
} else {
tunFd = options.FileDescriptor
}
tunFd, err := unix.Socket(unix.AF_SYSTEM, unix.SOCK_DGRAM, 2)
if err != nil {
return nil, err
}
err = configure(tunFd, ifIndex, options.Name, options)
if err != nil {
unix.Close(tunFd)
return nil, err
}
nativeTun := &NativeTun{
tunFile: os.NewFile(uintptr(tunFd), "utun"),
mtu: options.MTU,