echo -n mon0 >/sys/class/ieee80211/phy0/add_iface
What do you mean by "additional interface"?
Do you mean multiple STA interfaces? Does the zd hardware support
this? I'd say this is unlikely.
echo -n mon0 >/sys/class/ieee80211/phy0/add_iface
mon0 is an additional interface for me. An additional
monitoring interface is not supported by the hardware, but can
be emulated. However zd1211rw has registers for a second MAC
address. Therefore STA+STA and AP+STA could be supported, if
the firmware handles it properly.
The problem with the STA + MNTR interface is, that mac80211 must
do the FCS checking for the STA interface or the driver has to
filter them before forwarding them to the upper layer.
Well, it's not _that_ bad to forward frames with bad FCS in
monitor mode. Hey, it's monitor mode. We want to see what's
going on. ;) I'd say just push the corrupt frames upstream
and implement the FCS checking later.
Right. I think the radiotap header has support for a bad fcs
flag and for the STA interface, if present, the FCS check has
to be done anyhow.
--
Uli Kunitz
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