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-rw-r--r--drivers/net/wireless/ath/ath6kl/cfg80211.c18
-rw-r--r--include/net/cfg80211.h10
-rw-r--r--net/wireless/nl80211.c72
3 files changed, 83 insertions, 17 deletions
diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index 5c9736a94..008b4d92b 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -3244,6 +3244,14 @@ static int ath6kl_cfg80211_sscan_start(struct wiphy *wiphy,
struct ath6kl_vif *vif = netdev_priv(dev);
u16 interval;
int ret, rssi_thold;
+ int n_match_sets = request->n_match_sets;
+
+ /* If there's a matchset w/o an SSID, then assume it's just for
+ * the RSSI (nothing else is currently supported) and ignore it.
+ * The device only supports a global RSSI filter that we set below.
+ */
+ if (n_match_sets == 1 && !request->match_sets[0].ssid.ssid_len)
+ n_match_sets = 0;
if (ar->state != ATH6KL_STATE_ON)
return -EIO;
@@ -3256,11 +3264,11 @@ static int ath6kl_cfg80211_sscan_start(struct wiphy *wiphy,
ret = ath6kl_set_probed_ssids(ar, vif, request->ssids,
request->n_ssids,
request->match_sets,
- request->n_match_sets);
+ n_match_sets);
if (ret < 0)
return ret;
- if (!request->n_match_sets) {
+ if (!n_match_sets) {
ret = ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
ALL_BSS_FILTER, 0);
if (ret < 0)
@@ -3274,12 +3282,12 @@ static int ath6kl_cfg80211_sscan_start(struct wiphy *wiphy,
if (test_bit(ATH6KL_FW_CAPABILITY_RSSI_SCAN_THOLD,
ar->fw_capabilities)) {
- if (request->rssi_thold <= NL80211_SCAN_RSSI_THOLD_OFF)
+ if (request->min_rssi_thold <= NL80211_SCAN_RSSI_THOLD_OFF)
rssi_thold = 0;
- else if (request->rssi_thold < -127)
+ else if (request->min_rssi_thold < -127)
rssi_thold = -127;
else
- rssi_thold = request->rssi_thold;
+ rssi_thold = request->min_rssi_thold;
ret = ath6kl_wmi_set_rssi_filter_cmd(ar->wmi, vif->fw_vif_idx,
rssi_thold);
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 6719f3fe0..7957aa425 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1268,10 +1268,12 @@ struct cfg80211_scan_request {
/**
* struct cfg80211_match_set - sets of attributes to match
*
- * @ssid: SSID to be matched
+ * @ssid: SSID to be matched; may be zero-length for no match (RSSI only)
+ * @rssi_thold: don't report scan results below this threshold (in s32 dBm)
*/
struct cfg80211_match_set {
struct cfg80211_ssid ssid;
+ s32 rssi_thold;
};
/**
@@ -1293,7 +1295,8 @@ struct cfg80211_match_set {
* @dev: the interface
* @scan_start: start time of the scheduled scan
* @channels: channels to scan
- * @rssi_thold: don't report scan results below this threshold (in s32 dBm)
+ * @min_rssi_thold: for drivers only supporting a single threshold, this
+ * contains the minimum over all matchsets
*/
struct cfg80211_sched_scan_request {
struct cfg80211_ssid *ssids;
@@ -1305,7 +1308,8 @@ struct cfg80211_sched_scan_request {
u32 flags;
struct cfg80211_match_set *match_sets;
int n_match_sets;
- s32 rssi_thold;
+ s32 min_rssi_thold;
+ s32 rssi_thold; /* just for backward compatible */
/* internal */
struct wiphy *wiphy;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 53fa90a6b..7cd5224d5 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -5331,6 +5331,7 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
enum ieee80211_band band;
size_t ie_len;
struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
+ s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
!rdev->ops->sched_scan_start)
@@ -5369,11 +5370,40 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
if (n_ssids > wiphy->max_sched_scan_ssids)
return -EINVAL;
- if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
+ /*
+ * First, count the number of 'real' matchsets. Due to an issue with
+ * the old implementation, matchsets containing only the RSSI attribute
+ * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
+ * RSSI for all matchsets, rather than their own matchset for reporting
+ * all APs with a strong RSSI. This is needed to be compatible with
+ * older userspace that treated a matchset with only the RSSI as the
+ * global RSSI for all other matchsets - if there are other matchsets.
+ */
+ if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
nla_for_each_nested(attr,
info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
- tmp)
- n_match_sets++;
+ tmp) {
+ struct nlattr *rssi;
+
+ err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
+ nla_data(attr), nla_len(attr),
+ nl80211_match_policy);
+ if (err)
+ return err;
+ /* add other standalone attributes here */
+ if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
+ n_match_sets++;
+ continue;
+ }
+ rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
+ if (rssi)
+ default_match_rssi = nla_get_s32(rssi);
+ }
+ }
+
+ /* However, if there's no other matchset, add the RSSI one */
+ if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
+ n_match_sets = 1;
if (n_match_sets > wiphy->max_match_sets)
return -EINVAL;
@@ -5501,6 +5531,15 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
nl80211_match_policy);
ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
if (ssid) {
+ if (WARN_ON(i >= n_match_sets)) {
+ /* this indicates a programming error,
+ * the loop above should have verified
+ * things properly
+ */
+ err = -EINVAL;
+ goto out_free;
+ }
+
if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
err = -EINVAL;
goto out_free;
@@ -5509,17 +5548,32 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
nla_data(ssid), nla_len(ssid));
request->match_sets[i].ssid.ssid_len =
nla_len(ssid);
+ /* special attribute - old implemenation w/a */
+ request->match_sets[i].rssi_thold =
+ default_match_rssi;
+ rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
+ if (rssi)
+ request->match_sets[i].rssi_thold =
+ nla_get_s32(rssi);
}
- rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
- if (rssi)
- request->rssi_thold = nla_get_u32(rssi);
- else
- request->rssi_thold =
- NL80211_SCAN_RSSI_THOLD_OFF;
i++;
}
+
+ /* there was no other matchset, so the RSSI one is alone */
+ if (i == 0)
+ request->match_sets[0].rssi_thold = default_match_rssi;
+
+ request->min_rssi_thold = INT_MAX;
+ for (i = 0; i < n_match_sets; i++)
+ request->min_rssi_thold =
+ min(request->match_sets[i].rssi_thold,
+ request->min_rssi_thold);
+ } else {
+ request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
}
+ request->rssi_thold = request->min_rssi_thold;
+
if (info->attrs[NL80211_ATTR_IE]) {
request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
memcpy((void *)request->ie,
generated by cgit v1.2.3 (git 2.39.1) at 2026-03-14 10:23:40 +0000