snow/wireguard-go
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

tun: freebsd: allow empty names

Browse source 
This change allows omitting the tun interface name setting. When the
name is not set, the kernel automatically picks up the tun name and
index.

Signed-off-by: Kay Diam <kay.diam@gmail.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Kay Diam 2021-03-07 17:21:31 +01:00 committed by Jason A. Donenfeld
parent 82f3e9e2af
commit 6005c573e2
1 changed files with 18 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

34
tun/tun_freebsd.go
View file

@ -346,22 +346,24 @@ func CreateTUN(name string, mtu int) (Device, error) {
return nil, fmt.Errorf("Unable to set nd6 flags for %s: %w", assignedName, errno)
}
// Rename the interface
var newnp [unix.IFNAMSIZ]byte
copy(newnp[:], name)
var ifr ifreq_ptr
copy(ifr.Name[:], assignedName)
ifr.Data = uintptr(unsafe.Pointer(&newnp[0]))
_, _, errno = unix.Syscall(
unix.SYS_IOCTL,
uintptr(confd),
uintptr(unix.SIOCSIFNAME),
uintptr(unsafe.Pointer(&ifr)),
)
if errno != 0 {
tunFile.Close()
tunDestroy(assignedName)
return nil, fmt.Errorf("Failed to rename %s to %s: %w", assignedName, name, errno)
if name != "" {
// Rename the interface
var newnp [unix.IFNAMSIZ]byte
copy(newnp[:], name)
var ifr ifreq_ptr
copy(ifr.Name[:], assignedName)
ifr.Data = uintptr(unsafe.Pointer(&newnp[0]))
_, _, errno = unix.Syscall(
unix.SYS_IOCTL,
uintptr(confd),
uintptr(unix.SIOCSIFNAME),
uintptr(unsafe.Pointer(&ifr)),
)
if errno != 0 {
tunFile.Close()
tunDestroy(assignedName)
return nil, fmt.Errorf("Failed to rename %s to %s: %w", assignedName, name, errno)
}
}
return CreateTUNFromFile(tunFile, mtu)