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nl80211/cfg80211: add channel switch command

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To allow channel switch announcements within beacons, add
the channel switch command to nl80211/cfg80211. This is
implementation is intended for AP and (later) IBSS mode.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Simon Wunderlich 2013-07-11 16:09:05 +02:00 • committed by Johannes Berg
commit 16ef1fe272
5 changed files with 229 additions and 1 deletions
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30
include/uapi/linux/nl80211.h
View file

@ -676,6 +676,16 @@
* @NL80211_CMD_GET_COALESCE: Get currently supported coalesce rules.
* @NL80211_CMD_SET_COALESCE: Configure coalesce rules or clear existing rules.
*
* @NL80211_CMD_CHANNEL_SWITCH: Perform a channel switch by announcing the
* the new channel information (Channel Switch Announcement - CSA)
* in the beacon for some time (as defined in the
* %NL80211_ATTR_CH_SWITCH_COUNT parameter) and then change to the
* new channel. Userspace provides the new channel information (using
* %NL80211_ATTR_WIPHY_FREQ and the attributes determining channel
* width). %NL80211_ATTR_CH_SWITCH_BLOCK_TX may be supplied to inform
* other station that transmission must be blocked until the channel
* switch is complete.
*
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
@ -841,6 +851,8 @@ enum nl80211_commands {
NL80211_CMD_GET_COALESCE,
NL80211_CMD_SET_COALESCE,
NL80211_CMD_CHANNEL_SWITCH,
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
@ -1469,6 +1481,18 @@ enum nl80211_commands {
*
* @NL80211_ATTR_COALESCE_RULE: Coalesce rule information.
*
* @NL80211_ATTR_CH_SWITCH_COUNT: u32 attribute specifying the number of TBTT's
* until the channel switch event.
* @NL80211_ATTR_CH_SWITCH_BLOCK_TX: flag attribute specifying that transmission
* must be blocked on the current channel (before the channel switch
* operation).
* @NL80211_ATTR_CSA_IES: Nested set of attributes containing the IE information
* for the time while performing a channel switch.
* @NL80211_ATTR_CSA_C_OFF_BEACON: Offset of the channel switch counter
* field in the beacons tail (%NL80211_ATTR_BEACON_TAIL).
* @NL80211_ATTR_CSA_C_OFF_PRESP: Offset of the channel switch counter
* field in the probe response (%NL80211_ATTR_PROBE_RESP).
*
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@ -1771,6 +1795,12 @@ enum nl80211_attrs {
NL80211_ATTR_COALESCE_RULE,
NL80211_ATTR_CH_SWITCH_COUNT,
NL80211_ATTR_CH_SWITCH_BLOCK_TX,
NL80211_ATTR_CSA_IES,
NL80211_ATTR_CSA_C_OFF_BEACON,
NL80211_ATTR_CSA_C_OFF_PRESP,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,