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26 lines
483 B
Go
26 lines
483 B
Go
package sing_tun
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import (
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"fmt"
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"golang.org/x/sys/unix"
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"syscall"
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"unsafe"
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)
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const ifReqSize = unix.IFNAMSIZ + 64
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func getTunnelName(fd int32) (string, error) {
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var ifr [ifReqSize]byte
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var errno syscall.Errno
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_, _, errno = unix.Syscall(
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unix.SYS_IOCTL,
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uintptr(fd),
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uintptr(unix.TUNGETIFF),
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uintptr(unsafe.Pointer(&ifr[0])),
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)
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if errno != 0 {
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return "", fmt.Errorf("failed to get name of TUN device: %w", errno)
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}
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return unix.ByteSliceToString(ifr[:]), nil
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}
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