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use blocking mode pre-go1.11

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This commit is contained in:
Song Gao 2019-03-31 15:42:28 -07:00
parent 240a3d7b51
commit 3fe638a7bf
13 changed files with 132 additions and 95 deletions
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50
syscalls_linux.go
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@ -28,54 +28,26 @@ func ioctl(fd uintptr, request uintptr, argp uintptr) error {
return nil
}
func newTAP(config Config) (ifce *Interface, err error) {
fdInt, err := syscall.Open("/dev/net/tun", os.O_RDWR|syscall.O_NONBLOCK, 0)
if err != nil {
return nil, err
func setupFd(config Config, fd uintptr) (name string, err error) {
var flags uint16 = cIFFNOPI
if config.DeviceType == TUN {
flags |= cIFFTUN
} else {
flags |= cIFFTAP
}
fd := uintptr(fdInt)
var flags uint16
flags = cIFFTAP | cIFFNOPI
if config.PlatformSpecificParams.MultiQueue {
flags |= cIFFMULTIQUEUE
}
name, err := createInterface(fd, config.Name, flags)
if err != nil {
return nil, err
if name, err = createInterface(fd, config.Name, flags); err != nil {
return "", err
}
if err = setDeviceOptions(fd, config); err != nil {
return nil, err
return "", err
}
ifce = &Interface{isTAP: true, ReadWriteCloser: os.NewFile(fd, "tun"), name: name}
return
}
func newTUN(config Config) (ifce *Interface, err error) {
fdInt, err := syscall.Open("/dev/net/tun", os.O_RDWR|syscall.O_NONBLOCK, 0)
if err != nil {
return nil, err
}
fd := uintptr(fdInt)
var flags uint16
flags = cIFFTUN | cIFFNOPI
if config.PlatformSpecificParams.MultiQueue {
flags |= cIFFMULTIQUEUE
}
name, err := createInterface(fd, config.Name, flags)
if err != nil {
return nil, err
}
if err = setDeviceOptions(fd, config); err != nil {
return nil, err
}
ifce = &Interface{isTAP: false, ReadWriteCloser: os.NewFile(fd, "tun"), name: name}
return
return name, nil
}
func createInterface(fd uintptr, ifName string, flags uint16) (createdIFName string, err error) {