if the NL80211_SCAN_FLAG_PASSIVE_RADAR flag was specified upon
sw scan start, passively scan any channel marked as DFS.
Signed-off-by: Antonio Quartulli <anto...@open-mesh.com>
---
v2: fix variable names and add scan_req argument to
ieee80211_scan_get_channel_time()
net/mac80211/scan.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 4aeca4b..e369d61 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -599,7 +599,9 @@ static int __ieee80211_start_scan(struct
ieee80211_sub_if_data *sdata,
if ((req->channels[0]->flags &
IEEE80211_CHAN_NO_IR) ||
- !req->n_ssids) {
+ !req->n_ssids ||
+ ((req->channels[0]->flags & IEEE80211_CHAN_RADAR) &&
+ (req->flags & NL80211_SCAN_FLAG_PASSIVE_RADAR))) {
next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
} else {
ieee80211_scan_state_send_probe(local, &next_delay);
@@ -639,13 +641,16 @@ static int __ieee80211_start_scan(struct
ieee80211_sub_if_data *sdata,
}
static unsigned long
-ieee80211_scan_get_channel_time(struct ieee80211_channel *chan)
+ieee80211_scan_get_channel_time(struct ieee80211_channel *chan,
+ struct cfg80211_scan_request *scan_req)
{
/*
* TODO: channel switching also consumes quite some time,
* add that delay as well to get a better estimation
*/
- if (chan->flags & IEEE80211_CHAN_NO_IR)
+ if ((chan->flags & IEEE80211_CHAN_NO_IR) ||
+ ((chan->flags & IEEE80211_CHAN_RADAR) &&
+ (scan_req->flags & NL80211_SCAN_FLAG_PASSIVE_RADAR)))
return IEEE80211_PASSIVE_CHANNEL_TIME;
return IEEE80211_PROBE_DELAY + IEEE80211_CHANNEL_TIME;
}
@@ -698,7 +703,8 @@ static void ieee80211_scan_state_decision(struct
ieee80211_local *local,
*/
bad_latency = time_after(jiffies +
- ieee80211_scan_get_channel_time(next_chan),
+ ieee80211_scan_get_channel_time(next_chan,
+ scan_req),
local->leave_oper_channel_time + HZ / 8);
if (associated && !tx_empty) {
@@ -777,7 +783,9 @@ static void ieee80211_scan_state_set_channel(struct
ieee80211_local *local,
*
* In any case, it is not necessary for a passive scan.
*/
- if (chan->flags & IEEE80211_CHAN_NO_IR || !scan_req->n_ssids) {
+ if (chan->flags & IEEE80211_CHAN_NO_IR || !scan_req->n_ssids ||
+ ((chan->flags & IEEE80211_CHAN_RADAR) &&
+ (scan_req->flags & NL80211_SCAN_FLAG_PASSIVE_RADAR))) {
*next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
local->next_scan_state = SCAN_DECISION;
return;
--
2.6.3
--
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