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authorJohannes Berg <johannes.berg@intel.com>2014-08-12 20:34:30 +0200
committerJohannes Berg <johannes.berg@intel.com>2014-08-26 11:16:01 +0200
commit0e227084aee36b3ba27b4fc9cd9e425be6ce2ab8 (patch)
tree5a862e85d25ad5cf05e8f47800e20de792592e91 /include/net/cfg80211.h
parentf41ef64853fb1e02728e56b2d0d55aef8ed12b26 (diff)
downloadlinux-0e227084aee36b3ba27b4fc9cd9e425be6ce2ab8.tar.bz2
cfg80211: clarify BSS probe response vs. beacon data
There are a few possible cases of where BSS data came from: 1) only a beacon has been received 2) only a probe response has been received 3) the driver didn't report what it received (this happens when using cfg80211_inform_bss[_width]()) 4) both probe response and beacon data has been received Unfortunately, in the userspace API, a few things weren't there: a) there was no way to differentiate cases 1) and 4) above without comparing the data of the IEs b) the TSF was always from the last frame, instead of being exposed for beacon/probe response separately like IEs Fix this by i) exporting a new flag attribute that indicates whether or not probe response data has been received - this addresses (a) ii) exporting a BEACON_TSF attribute that holds the beacon's TSF if a beacon has been received iii) not exporting the beacon attributes in case (3) above as that would just lead userspace into thinking the data actually came from a beacon when that isn't clear To implement this, track inside the IEs struct whether or not it (definitely) came from a beacon. Reported-by: William Seto Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/net/cfg80211.h')
-rw-r--r--include/net/cfg80211.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 7b8dac3efe8f..77b85a89abca 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1503,12 +1503,14 @@ enum cfg80211_signal_type {
* @tsf: TSF contained in the frame that carried these IEs
* @rcu_head: internal use, for freeing
* @len: length of the IEs
+ * @from_beacon: these IEs are known to come from a beacon
* @data: IE data
*/
struct cfg80211_bss_ies {
u64 tsf;
struct rcu_head rcu_head;
int len;
+ bool from_beacon;
u8 data[];
};