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-rw-r--r--net/mac80211/ieee80211_i.h3
-rw-r--r--net/mac80211/main.c4
-rw-r--r--net/mac80211/rx.c2
-rw-r--r--net/mac80211/scan.c95
4 files changed, 77 insertions, 27 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index bd7a451..1d07426 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -803,6 +803,8 @@ struct tpt_led_trigger {
* well be on the operating channel
* @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
* determine if we are on the operating channel or not
+ * @SCAN_ONCHANNEL_SCANNING: Do a software scan on only the current operating
+ * channel. This should not interrupt normal traffic.
* @SCAN_COMPLETED: Set for our scan work function when the driver reported
* that the scan completed.
* @SCAN_ABORTED: Set for our scan work function when the driver reported
@@ -811,6 +813,7 @@ struct tpt_led_trigger {
enum {
SCAN_SW_SCANNING,
SCAN_HW_SCANNING,
+ SCAN_ONCHANNEL_SCANNING,
SCAN_COMPLETED,
SCAN_ABORTED,
};
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index ac79d5e..b70f7f0 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -47,7 +47,8 @@ void ieee80211_configure_filter(struct ieee80211_local *local)
if (atomic_read(&local->iff_allmultis))
new_flags |= FIF_ALLMULTI;
- if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning))
+ if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+ test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
new_flags |= FIF_BCN_PRBRESP_PROMISC;
if (local->fif_probe_req || local->probe_req_reg)
@@ -148,6 +149,7 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
}
if (test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+ test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
test_bit(SCAN_HW_SCANNING, &local->scanning))
power = chan->max_power;
else
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 54a0491..dd2fbec 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -425,6 +425,7 @@ ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx)
if (test_bit(SCAN_HW_SCANNING, &local->scanning) ||
test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+ test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
local->sched_scanning)
return ieee80211_scan_rx(rx->sdata, skb);
@@ -2915,6 +2916,7 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
local->dot11ReceivedFragmentCount++;
if (unlikely(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
+ test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
test_bit(SCAN_SW_SCANNING, &local->scanning)))
status->rx_flags |= IEEE80211_RX_IN_SCAN;
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 45f5aa2..8282284 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -401,6 +401,30 @@ void ieee80211_run_deferred_scan(struct ieee80211_local *local)
round_jiffies_relative(0));
}
+static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
+ unsigned long *next_delay)
+{
+ int i;
+ struct ieee80211_sub_if_data *sdata = local->scan_sdata;
+ enum ieee80211_band band = local->hw.conf.channel->band;
+
+ for (i = 0; i < local->scan_req->n_ssids; i++)
+ ieee80211_send_probe_req(
+ sdata, NULL,
+ local->scan_req->ssids[i].ssid,
+ local->scan_req->ssids[i].ssid_len,
+ local->scan_req->ie, local->scan_req->ie_len,
+ local->scan_req->rates[band], false,
+ local->scan_req->no_cck);
+
+ /*
+ * After sending probe requests, wait for probe responses
+ * on the channel.
+ */
+ *next_delay = IEEE80211_CHANNEL_TIME;
+ local->next_scan_state = SCAN_DECISION;
+}
+
static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata,
struct cfg80211_scan_request *req)
{
@@ -451,10 +475,47 @@ static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata,
local->scan_req = req;
local->scan_sdata = sdata;
- if (local->ops->hw_scan)
+ if (local->ops->hw_scan) {
__set_bit(SCAN_HW_SCANNING, &local->scanning);
- else
+ } else if ((req->n_channels == 1) &&
+ (req->channels[0]->center_freq ==
+ local->hw.conf.channel->center_freq)) {
+
+ /* If we are scanning only on the current channel, then
+ * we do not need to stop normal activities
+ */
+ unsigned long next_delay;
+
+ __set_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
+
+ ieee80211_recalc_idle(local);
+
+ /* Notify driver scan is starting, keep order of operations
+ * same as normal software scan, in case that matters. */
+ drv_sw_scan_start(local);
+
+ ieee80211_configure_filter(local); /* accept probe-responses */
+
+ /* We need to ensure power level is at max for scanning. */
+ ieee80211_hw_config(local, 0);
+
+ if ((req->channels[0]->flags &
+ IEEE80211_CHAN_PASSIVE_SCAN) ||
+ !local->scan_req->n_ssids) {
+ next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
+ } else {
+ ieee80211_scan_state_send_probe(local, &next_delay);
+ next_delay = IEEE80211_CHANNEL_TIME;
+ }
+
+ /* Now, just wait a bit and we are all done! */
+ ieee80211_queue_delayed_work(&local->hw, &local->scan_work,
+ next_delay);
+ return 0;
+ } else {
+ /* Do normal software scan */
__set_bit(SCAN_SW_SCANNING, &local->scanning);
+ }
ieee80211_recalc_idle(local);
@@ -611,30 +672,6 @@ static void ieee80211_scan_state_set_channel(struct ieee80211_local *local,
local->next_scan_state = SCAN_SEND_PROBE;
}
-static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
- unsigned long *next_delay)
-{
- int i;
- struct ieee80211_sub_if_data *sdata = local->scan_sdata;
- enum ieee80211_band band = local->hw.conf.channel->band;
-
- for (i = 0; i < local->scan_req->n_ssids; i++)
- ieee80211_send_probe_req(
- sdata, NULL,
- local->scan_req->ssids[i].ssid,
- local->scan_req->ssids[i].ssid_len,
- local->scan_req->ie, local->scan_req->ie_len,
- local->scan_req->rates[band], false,
- local->scan_req->no_cck);
-
- /*
- * After sending probe requests, wait for probe responses
- * on the channel.
- */
- *next_delay = IEEE80211_CHANNEL_TIME;
- local->next_scan_state = SCAN_DECISION;
-}
-
static void ieee80211_scan_state_suspend(struct ieee80211_local *local,
unsigned long *next_delay)
{
@@ -685,6 +722,12 @@ void ieee80211_scan_work(struct work_struct *work)
sdata = local->scan_sdata;
+ /* When scanning on-channel, the first-callback means completed. */
+ if (test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) {
+ aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning);
+ goto out_complete;
+ }
+
if (test_and_clear_bit(SCAN_COMPLETED, &local->scanning)) {
aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning);
goto out_complete;
generated by cgit v0.10.2 at 2024-08-06 12:56:55 (GMT)