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Diffstat (limited to 'net/wireless/scan.c')
-rw-r--r--net/wireless/scan.c121
1 files changed, 78 insertions, 43 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 22e92be61938..b888522f133b 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -406,22 +406,20 @@ static int
cfg80211_add_nontrans_list(struct cfg80211_bss *trans_bss,
struct cfg80211_bss *nontrans_bss)
{
- const u8 *ssid;
- size_t ssid_len;
+ const struct element *ssid_elem;
struct cfg80211_bss *bss = NULL;
rcu_read_lock();
- ssid = ieee80211_bss_get_ie(nontrans_bss, WLAN_EID_SSID);
- if (!ssid) {
+ ssid_elem = ieee80211_bss_get_elem(nontrans_bss, WLAN_EID_SSID);
+ if (!ssid_elem) {
rcu_read_unlock();
return -EINVAL;
}
- ssid_len = ssid[1];
- ssid = ssid + 2;
/* check if nontrans_bss is in the list */
list_for_each_entry(bss, &trans_bss->nontrans_list, nontrans_list) {
- if (is_bss(bss, nontrans_bss->bssid, ssid, ssid_len)) {
+ if (is_bss(bss, nontrans_bss->bssid, ssid_elem->data,
+ ssid_elem->datalen)) {
rcu_read_unlock();
return 0;
}
@@ -1795,33 +1793,52 @@ cfg80211_bss_update(struct cfg80211_registered_device *rdev,
}
int cfg80211_get_ies_channel_number(const u8 *ie, size_t ielen,
- enum nl80211_band band)
+ enum nl80211_band band,
+ enum cfg80211_bss_frame_type ftype)
{
- const u8 *tmp;
- int channel_number = -1;
+ const struct element *tmp;
+
+ if (band == NL80211_BAND_6GHZ) {
+ struct ieee80211_he_operation *he_oper;
- if (band == NL80211_BAND_S1GHZ) {
- tmp = cfg80211_find_ie(WLAN_EID_S1G_OPERATION, ie, ielen);
- if (tmp && tmp[1] >= sizeof(struct ieee80211_s1g_oper_ie)) {
- struct ieee80211_s1g_oper_ie *s1gop = (void *)(tmp + 2);
+ tmp = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie,
+ ielen);
+ if (tmp && tmp->datalen >= sizeof(*he_oper) &&
+ tmp->datalen >= ieee80211_he_oper_size(&tmp->data[1])) {
+ const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
+
+ he_oper = (void *)&tmp->data[1];
+
+ he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
+ if (!he_6ghz_oper)
+ return -1;
- channel_number = s1gop->primary_ch;
+ if (ftype != CFG80211_BSS_FTYPE_BEACON ||
+ he_6ghz_oper->control & IEEE80211_HE_6GHZ_OPER_CTRL_DUP_BEACON)
+ return he_6ghz_oper->primary;
+ }
+ } else if (band == NL80211_BAND_S1GHZ) {
+ tmp = cfg80211_find_elem(WLAN_EID_S1G_OPERATION, ie, ielen);
+ if (tmp && tmp->datalen >= sizeof(struct ieee80211_s1g_oper_ie)) {
+ struct ieee80211_s1g_oper_ie *s1gop = (void *)tmp->data;
+
+ return s1gop->primary_ch;
}
} else {
- tmp = cfg80211_find_ie(WLAN_EID_DS_PARAMS, ie, ielen);
- if (tmp && tmp[1] == 1) {
- channel_number = tmp[2];
- } else {
- tmp = cfg80211_find_ie(WLAN_EID_HT_OPERATION, ie, ielen);
- if (tmp && tmp[1] >= sizeof(struct ieee80211_ht_operation)) {
- struct ieee80211_ht_operation *htop = (void *)(tmp + 2);
+ tmp = cfg80211_find_elem(WLAN_EID_DS_PARAMS, ie, ielen);
+ if (tmp && tmp->datalen == 1)
+ return tmp->data[0];
- channel_number = htop->primary_chan;
- }
+ tmp = cfg80211_find_elem(WLAN_EID_HT_OPERATION, ie, ielen);
+ if (tmp &&
+ tmp->datalen >= sizeof(struct ieee80211_ht_operation)) {
+ struct ieee80211_ht_operation *htop = (void *)tmp->data;
+
+ return htop->primary_chan;
}
}
- return channel_number;
+ return -1;
}
EXPORT_SYMBOL(cfg80211_get_ies_channel_number);
@@ -1831,18 +1848,20 @@ EXPORT_SYMBOL(cfg80211_get_ies_channel_number);
* from neighboring channels and the Beacon frames use the DSSS Parameter Set
* element to indicate the current (transmitting) channel, but this might also
* be needed on other bands if RX frequency does not match with the actual
- * operating channel of a BSS.
+ * operating channel of a BSS, or if the AP reports a different primary channel.
*/
static struct ieee80211_channel *
cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen,
struct ieee80211_channel *channel,
- enum nl80211_bss_scan_width scan_width)
+ enum nl80211_bss_scan_width scan_width,
+ enum cfg80211_bss_frame_type ftype)
{
u32 freq;
int channel_number;
struct ieee80211_channel *alt_channel;
- channel_number = cfg80211_get_ies_channel_number(ie, ielen, channel->band);
+ channel_number = cfg80211_get_ies_channel_number(ie, ielen,
+ channel->band, ftype);
if (channel_number < 0) {
/* No channel information in frame payload */
@@ -1850,6 +1869,16 @@ cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen,
}
freq = ieee80211_channel_to_freq_khz(channel_number, channel->band);
+
+ /*
+ * In 6GHz, duplicated beacon indication is relevant for
+ * beacons only.
+ */
+ if (channel->band == NL80211_BAND_6GHZ &&
+ (freq == channel->center_freq ||
+ abs(freq - channel->center_freq) > 80))
+ return channel;
+
alt_channel = ieee80211_get_channel_khz(wiphy, freq);
if (!alt_channel) {
if (channel->band == NL80211_BAND_2GHZ) {
@@ -1911,7 +1940,7 @@ cfg80211_inform_single_bss_data(struct wiphy *wiphy,
return NULL;
channel = cfg80211_get_bss_channel(wiphy, ie, ielen, data->chan,
- data->scan_width);
+ data->scan_width, ftype);
if (!channel)
return NULL;
@@ -2234,7 +2263,8 @@ cfg80211_update_notlisted_nontrans(struct wiphy *wiphy,
struct ieee80211_mgmt *mgmt, size_t len)
{
u8 *ie, *new_ie, *pos;
- const u8 *nontrans_ssid, *trans_ssid, *mbssid;
+ const struct element *nontrans_ssid;
+ const u8 *trans_ssid, *mbssid;
size_t ielen = len - offsetof(struct ieee80211_mgmt,
u.probe_resp.variable);
size_t new_ie_len;
@@ -2261,11 +2291,11 @@ cfg80211_update_notlisted_nontrans(struct wiphy *wiphy,
return;
new_ie_len -= mbssid[1];
- nontrans_ssid = ieee80211_bss_get_ie(nontrans_bss, WLAN_EID_SSID);
+ nontrans_ssid = ieee80211_bss_get_elem(nontrans_bss, WLAN_EID_SSID);
if (!nontrans_ssid)
return;
- new_ie_len += nontrans_ssid[1];
+ new_ie_len += nontrans_ssid->datalen;
/* generate new ie for nontrans BSS
* 1. replace SSID with nontrans BSS' SSID
@@ -2282,7 +2312,7 @@ cfg80211_update_notlisted_nontrans(struct wiphy *wiphy,
pos = new_ie;
/* copy the nontransmitted SSID */
- cpy_len = nontrans_ssid[1] + 2;
+ cpy_len = nontrans_ssid->datalen + 2;
memcpy(pos, nontrans_ssid, cpy_len);
pos += cpy_len;
/* copy the IEs between SSID and MBSSID */
@@ -2333,6 +2363,7 @@ cfg80211_inform_single_bss_frame_data(struct wiphy *wiphy,
size_t ielen, min_hdr_len = offsetof(struct ieee80211_mgmt,
u.probe_resp.variable);
int bss_type;
+ enum cfg80211_bss_frame_type ftype;
BUILD_BUG_ON(offsetof(struct ieee80211_mgmt, u.probe_resp.variable) !=
offsetof(struct ieee80211_mgmt, u.beacon.variable));
@@ -2369,8 +2400,16 @@ cfg80211_inform_single_bss_frame_data(struct wiphy *wiphy,
variable = ext->u.s1g_beacon.variable;
}
+ if (ieee80211_is_beacon(mgmt->frame_control))
+ ftype = CFG80211_BSS_FTYPE_BEACON;
+ else if (ieee80211_is_probe_resp(mgmt->frame_control))
+ ftype = CFG80211_BSS_FTYPE_PRESP;
+ else
+ ftype = CFG80211_BSS_FTYPE_UNKNOWN;
+
channel = cfg80211_get_bss_channel(wiphy, variable,
- ielen, data->chan, data->scan_width);
+ ielen, data->chan, data->scan_width,
+ ftype);
if (!channel)
return NULL;
@@ -2687,7 +2726,7 @@ int cfg80211_wext_siwscan(struct net_device *dev,
struct cfg80211_registered_device *rdev;
struct wiphy *wiphy;
struct iw_scan_req *wreq = NULL;
- struct cfg80211_scan_request *creq = NULL;
+ struct cfg80211_scan_request *creq;
int i, err, n_channels = 0;
enum nl80211_band band;
@@ -2702,10 +2741,8 @@ int cfg80211_wext_siwscan(struct net_device *dev,
if (IS_ERR(rdev))
return PTR_ERR(rdev);
- if (rdev->scan_req || rdev->scan_msg) {
- err = -EBUSY;
- goto out;
- }
+ if (rdev->scan_req || rdev->scan_msg)
+ return -EBUSY;
wiphy = &rdev->wiphy;
@@ -2718,10 +2755,8 @@ int cfg80211_wext_siwscan(struct net_device *dev,
creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) +
n_channels * sizeof(void *),
GFP_ATOMIC);
- if (!creq) {
- err = -ENOMEM;
- goto out;
- }
+ if (!creq)
+ return -ENOMEM;
creq->wiphy = wiphy;
creq->wdev = dev->ieee80211_ptr;
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-27 20:01:42 +0000