CVSROOT: /cvs
Module name: src
Changes by: s...@cvs.openbsd.org 2022/03/20 06:01:58
Modified files:
sys/dev/ic : bwfm.c
sys/dev/pci : if_iwm.c if_iwn.c if_iwx.c
sys/net80211 : ieee80211_input.c ieee80211_node.h
Log message:
Introduce an alternative mechanism for wifi drivers to communicate
the channel on which a frame was received.
ieee80211_inputm() was expecting that ic->ic_bss->ni_chan would correspond
to the channel which is currently being scanned. This dates back to older
devices which are manually tuned to the next channel by the driver during
SCAN->SCAN state transitions.
However, this approach is very awkward for drivers which scan across a
whole range of channels in firmware. Such drivers had an ugly workaround
in place which tweaked ni_chan for each received frame.
Introduce a channel number field in the Rx info struct which drivers
can use to indicate the channel on which a frame was received.
If this field is set, net80211 will use it instead of using the current
channel of ic_bss. Use this new mechanism in all affected drivers.
Tested by jmc@, sthen@, and myself on iwm(4) and iwx(4).
Changes to iwn(4) and bwfm(4) are the same mechanical changes to get rid
of the ni_chan tweak, and are therefore expected to work.
ok sthen@ dlg@
