[pkg-wpa-devel] Bug#471858: Bug#471858: Bug#471858: wpasupplicant: option "wpa_iface" half works - but does IP config on the wpa_iface not the actual interface (normally a bridge)

[Kel Modderman]

On Friday 21 March 2008 22:24:06 Paul Hedderly wrote:
> Kel Modderman wrote:
> > On Friday 21 March 2008 08:28:01 Kel Modderman wrote:
> >   
> >> On Friday 21 March 2008 03:50:04 Paul Hedderly wrote:
> >>     
> >>> /etc/network/if-up.d/wpasupplicant says:
> >>>
> >>>   # allow wpa_supplicant interface to be specified via wpa-iface
> >>>   # useful for starting wpa_supplicant on one interface of a bridge
> >>>   if [ -n "$IF_WPA_IFACE" ]; then
> >>>         WPA_IFACE="$IF_WPA_IFACE"
> >>>   else
> >>>         WPA_IFACE="$IFACE"
> >>>   fi
> >>>
> >>> If I have an interfaces stanza:
> >>>
> >>>   iface bridge inet manual
> >>>     pre-up ip link set up dev wlan0 # (Needed with iwl3945)
> >>>     bridge_ports wlan0
> >>>     wpa_iface wlan0
> >>>     wpa_roam /etc/network/wpa_supplicant.conf
> >>>       
> >
> > Aha, i missed this bit, you combine bridge mode with roaming daemon? This is...
> > interesting.
> >   
> Is that another way of saying "you're crazy!" :O)
> > Don't roam with a bridged interface, I don't think the wpa-roam schema will
> > ever be extended to support this.
> >   
> 
> I want / 'need' to bridge because I want to
>     a) use my laptop as a wireless bridge ocassionaly
>     b) link in a VDE2 tap interface onto the bridge so that test qemu
> instances can get bridged onto the network properly.
> 
> I'm sure it is possible :O)

Yes i think its a bit crazy, and yes everything is possible ;-)

Whether or not its worth too much hassle I dunno.

> 
> In /etc/wpa_supplicant/functions.sh in the "ifup" function used
> /sbin/wpa_action.sh, it does:
> 
>                                     /sbin/ifup
> "$WPA_IFACE=$WPA_LOGICAL_IFACE"
> 
> Can that be changed to an if statement that checks to see if
> IF_WPA_IFACE is set, and it so uses it
> 
>       if ([ "x$IF_WPA_IFACE" == "x" ]); then /sbin/ifup
> "$WPA_IFACE=$WPA_LOGICAL_IFACE"
>        else; /sbin/ifup "$IF_WPA_IFACE=$WPA_LOGICAL_IFACE"
>       fi
> 
> I don't know if the IF_WPA_IFACE gets passed through to that point, and
> I havent tested it.
> 
> Just testing my logic :O)

When wpa_action is called by wpa_cli, WPA_IFACE is inherited from the
environment (which is provided by wpa_cli/wpa_supplicant).

Thanks, Kel.