Re: How to tell if a network interface was renamed (and from what)
Date: Mon, 20 Nov 2023 21:23:31 UTC
FWIW, here is the relevant ifinfo output of a sample machine: # ifinfo | grep ^Interface Interface igb0 (igb0): Interface igb1 (igb1): Interface igb2 (igb2): Interface igb3 (igb3): Interface enc0 (enc0): Interface lo0 (lo0): Interface pflog0 (pflog0): Interface pfsync0 (pfsync0): Interface lagg0 (lagg0): Interface igb2_vlan42 (vlan0): Interface vlan0.1.23 (vlan1): Interface vlan0.3 (vlan2): Interface vlan0.5.6.7 (vlan3): Interface vlan01. (vlan4): Interface vlan06 (vlan5): Interface vlan08 (vlan6): Interface qinq0.123 (vlan7): Interface gre2 (gre2): Interface gre0 (gre0): Interface gif4 (gif4): Interface gif1 (gif1): Interface gif0 (gif0): Interface l2tp0 (ng0): Interface bridge0 (bridge0): Interface lo1 (lo1): Interface lo2 (lo2): Interface ovpns2 (tap2): Interface ovpnc1 (tun1): Interface ovpnc3 (tun3): Interface ovpns4 (tun4): Interface wg0 (wg0): Interface wg1 (wg1): > On 20. Nov 2023, at 22:16, Franco Fichtner <franco@opnsense.org> wrote: > > >> On 20. Nov 2023, at 21:56, Kristof Provost <kp@FreeBSD.org> wrote: >> >> I’d look in the direction of just adding a field to struct ifnet with the original interface name (likely easily done in if_attach()), along with a new ioctl to retrieve that field. > > ifconfig_get_orig_name() already exists, but apart from wlandebug > nothing is using it. > > The internally used IFDATA_DRIVERNAME also appears in ifinfo > (not installed in base) and bsnmpd but that's it. > > if_dname is the target and it exists in ifnet struct along with > a man page entry in inet(9). > > All that is really missing is a way to print it via ifconfig command. > > > Cheers, > Franco