mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-10 02:53:12 +00:00
35 lines
601 B
Go
35 lines
601 B
Go
|
package libbox
|
||
|
|
|
||
|
|
import (
|
||
|
|
"golang.org/x/sys/unix"
|
||
|
|
)
|
||
|
|
|
||
|
|
// kanged from wireauard-apple
|
||
|
|
|
||
|
|
const utunControlName = "com.apple.net.utun_control"
|
||
|
|
|
||
|
|
func GetTunnelFileDescriptor() int32 {
|
||
|
|
ctlInfo := &unix.CtlInfo{}
|
||
|
|
copy(ctlInfo.Name[:], utunControlName)
|
||
|
|
for fd := 0; fd < 1024; fd++ {
|
||
|
|
addr, err := unix.Getpeername(fd)
|
||
|
|
if err != nil {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
addrCTL, loaded := addr.(*unix.SockaddrCtl)
|
||
|
|
if !loaded {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
if ctlInfo.Id == 0 {
|
||
|
|
err = unix.IoctlCtlInfo(fd, ctlInfo)
|
||
|
|
if err != nil {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if addrCTL.ID == ctlInfo.Id {
|
||
|
|
return int32(fd)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return -1
|
||
|
|
}
|