This change allows to omit the tun interface name setting in FreeBSD. When name is not set, kernel automatically picks up the tun name and index.
Signed-off-by: kayrus <[email protected]> --- tun/tun_freebsd.go | 34 ++++++++++++++++++---------------- 1 file changed, 18 insertions(+), 16 deletions(-) diff --git a/tun/tun_freebsd.go b/tun/tun_freebsd.go index 12b44da..1883aad 100644 --- a/tun/tun_freebsd.go +++ b/tun/tun_freebsd.go @@ -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) -- 2.25.1
