mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 08:44:21 +08:00
24398e39c8
Changing the channel type during operation is confusing to some drivers and will be hard to handle in multi-channel scenarios. Instead of changing the channel, set it to the right HT channel before authenticating/associating and don't change it -- just update the 20/40 MHz restrictions in rate control as needed when changed by the AP. This also fixes a problem that Paul missed in his fix for the "regulatory makes us deaf" issue -- when we couldn't use 40 MHz we still associated saying we were using 40 MHz, which could in similarly broken APs make us never even connect successfully. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
96 lines
2.5 KiB
Plaintext
96 lines
2.5 KiB
Plaintext
#
|
|
# This outlines the Linux authentication/association and
|
|
# deauthentication/disassociation flows.
|
|
#
|
|
# This can be converted into a diagram using the service
|
|
# at http://www.websequencediagrams.com/
|
|
#
|
|
|
|
participant userspace
|
|
participant mac80211
|
|
participant driver
|
|
|
|
alt authentication needed (not FT)
|
|
userspace->mac80211: authenticate
|
|
|
|
alt authenticated/authenticating already
|
|
mac80211->driver: sta_state(AP, not-exists)
|
|
mac80211->driver: bss_info_changed(clear BSSID)
|
|
else associated
|
|
note over mac80211,driver
|
|
like deauth/disassoc, without sending the
|
|
BA session stop & deauth/disassoc frames
|
|
end note
|
|
end
|
|
|
|
mac80211->driver: config(channel, channel type)
|
|
mac80211->driver: bss_info_changed(set BSSID, basic rate bitmap)
|
|
mac80211->driver: sta_state(AP, exists)
|
|
|
|
alt no probe request data known
|
|
mac80211->driver: TX directed probe request
|
|
driver->mac80211: RX probe response
|
|
end
|
|
|
|
mac80211->driver: TX auth frame
|
|
driver->mac80211: RX auth frame
|
|
|
|
alt WEP shared key auth
|
|
mac80211->driver: TX auth frame
|
|
driver->mac80211: RX auth frame
|
|
end
|
|
|
|
mac80211->driver: sta_state(AP, authenticated)
|
|
mac80211->userspace: RX auth frame
|
|
|
|
end
|
|
|
|
userspace->mac80211: associate
|
|
alt authenticated or associated
|
|
note over mac80211,driver: cleanup like for authenticate
|
|
end
|
|
|
|
alt not previously authenticated (FT)
|
|
mac80211->driver: config(channel, channel type)
|
|
mac80211->driver: bss_info_changed(set BSSID, basic rate bitmap)
|
|
mac80211->driver: sta_state(AP, exists)
|
|
mac80211->driver: sta_state(AP, authenticated)
|
|
end
|
|
mac80211->driver: TX assoc
|
|
driver->mac80211: RX assoc response
|
|
note over mac80211: init rate control
|
|
mac80211->driver: sta_state(AP, associated)
|
|
|
|
alt not using WPA
|
|
mac80211->driver: sta_state(AP, authorized)
|
|
end
|
|
|
|
mac80211->driver: set up QoS parameters
|
|
|
|
mac80211->driver: bss_info_changed(QoS, HT, associated with AID)
|
|
mac80211->userspace: associated
|
|
|
|
note left of userspace: associated now
|
|
|
|
alt using WPA
|
|
note over userspace
|
|
do 4-way-handshake
|
|
(data frames)
|
|
end note
|
|
userspace->mac80211: authorized
|
|
mac80211->driver: sta_state(AP, authorized)
|
|
end
|
|
|
|
userspace->mac80211: deauthenticate/disassociate
|
|
mac80211->driver: stop BA sessions
|
|
mac80211->driver: TX deauth/disassoc
|
|
mac80211->driver: flush frames
|
|
mac80211->driver: sta_state(AP,associated)
|
|
mac80211->driver: sta_state(AP,authenticated)
|
|
mac80211->driver: sta_state(AP,exists)
|
|
mac80211->driver: sta_state(AP,not-exists)
|
|
mac80211->driver: turn off powersave
|
|
mac80211->driver: bss_info_changed(clear BSSID, not associated, no QoS, ...)
|
|
mac80211->driver: config(channel type to non-HT)
|
|
mac80211->userspace: disconnected
|