summaryrefslogtreecommitdiff
path: root/net/wireless/scan.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/wireless/scan.c')
-rw-r--r--net/wireless/scan.c243
1 files changed, 187 insertions, 56 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 9e5ccffd6868..2249b1a89d1c 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -20,6 +20,7 @@
#include <net/cfg80211.h>
#include <net/cfg80211-wext.h>
#include <net/iw_handler.h>
+#include <kunit/visibility.h>
#include "core.h"
#include "nl80211.h"
#include "wext-compat.h"
@@ -303,9 +304,10 @@ static size_t cfg80211_copy_elem_with_frags(const struct element *elem,
return *pos - buf;
}
-static size_t cfg80211_gen_new_ie(const u8 *ie, size_t ielen,
- const u8 *subie, size_t subie_len,
- u8 *new_ie, size_t new_ie_len)
+VISIBLE_IF_CFG80211_KUNIT size_t
+cfg80211_gen_new_ie(const u8 *ie, size_t ielen,
+ const u8 *subie, size_t subie_len,
+ u8 *new_ie, size_t new_ie_len)
{
const struct element *non_inherit_elem, *parent, *sub;
u8 *pos = new_ie;
@@ -413,6 +415,7 @@ static size_t cfg80211_gen_new_ie(const u8 *ie, size_t ielen,
return pos - new_ie;
}
+EXPORT_SYMBOL_IF_CFG80211_KUNIT(cfg80211_gen_new_ie);
static bool is_bss(struct cfg80211_bss *a, const u8 *bssid,
const u8 *ssid, size_t ssid_len)
@@ -1535,12 +1538,13 @@ static bool cfg80211_bss_type_match(u16 capability,
}
/* Returned bss is reference counted and must be cleaned up appropriately. */
-struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
- struct ieee80211_channel *channel,
- const u8 *bssid,
- const u8 *ssid, size_t ssid_len,
- enum ieee80211_bss_type bss_type,
- enum ieee80211_privacy privacy)
+struct cfg80211_bss *__cfg80211_get_bss(struct wiphy *wiphy,
+ struct ieee80211_channel *channel,
+ const u8 *bssid,
+ const u8 *ssid, size_t ssid_len,
+ enum ieee80211_bss_type bss_type,
+ enum ieee80211_privacy privacy,
+ u32 use_for)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
struct cfg80211_internal_bss *bss, *res = NULL;
@@ -1565,6 +1569,8 @@ struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
continue;
if (!is_valid_ether_addr(bss->pub.bssid))
continue;
+ if ((bss->pub.use_for & use_for) != use_for)
+ continue;
/* Don't get expired BSS structs */
if (time_after(now, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE) &&
!atomic_read(&bss->hold))
@@ -1582,7 +1588,7 @@ struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
trace_cfg80211_return_bss(&res->pub);
return &res->pub;
}
-EXPORT_SYMBOL(cfg80211_get_bss);
+EXPORT_SYMBOL(__cfg80211_get_bss);
static void rb_insert_bss(struct cfg80211_registered_device *rdev,
struct cfg80211_internal_bss *bss)
@@ -1746,7 +1752,9 @@ cfg80211_update_known_bss(struct cfg80211_registered_device *rdev,
new->pub.proberesp_ies);
if (old)
kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head);
- } else if (rcu_access_pointer(new->pub.beacon_ies)) {
+ }
+
+ if (rcu_access_pointer(new->pub.beacon_ies)) {
const struct cfg80211_bss_ies *old;
if (known->pub.hidden_beacon_bss &&
@@ -1800,6 +1808,8 @@ cfg80211_update_known_bss(struct cfg80211_registered_device *rdev,
ether_addr_copy(known->parent_bssid, new->parent_bssid);
known->pub.max_bssid_indicator = new->pub.max_bssid_indicator;
known->pub.bssid_index = new->pub.bssid_index;
+ known->pub.use_for &= new->pub.use_for;
+ known->pub.cannot_use_reasons = new->pub.cannot_use_reasons;
return true;
}
@@ -1811,15 +1821,15 @@ __cfg80211_bss_update(struct cfg80211_registered_device *rdev,
bool signal_valid, unsigned long ts)
{
struct cfg80211_internal_bss *found = NULL;
+ struct cfg80211_bss_ies *ies;
if (WARN_ON(!tmp->pub.channel))
- return NULL;
+ goto free_ies;
tmp->ts = ts;
- if (WARN_ON(!rcu_access_pointer(tmp->pub.ies))) {
- return NULL;
- }
+ if (WARN_ON(!rcu_access_pointer(tmp->pub.ies)))
+ goto free_ies;
found = rb_find_bss(rdev, tmp, BSS_CMP_REGULAR);
@@ -1829,7 +1839,6 @@ __cfg80211_bss_update(struct cfg80211_registered_device *rdev,
} else {
struct cfg80211_internal_bss *new;
struct cfg80211_internal_bss *hidden;
- struct cfg80211_bss_ies *ies;
/*
* create a copy -- the "res" variable that is passed in
@@ -1838,15 +1847,8 @@ __cfg80211_bss_update(struct cfg80211_registered_device *rdev,
*/
new = kzalloc(sizeof(*new) + rdev->wiphy.bss_priv_size,
GFP_ATOMIC);
- if (!new) {
- ies = (void *)rcu_dereference(tmp->pub.beacon_ies);
- if (ies)
- kfree_rcu(ies, rcu_head);
- ies = (void *)rcu_dereference(tmp->pub.proberesp_ies);
- if (ies)
- kfree_rcu(ies, rcu_head);
- return NULL;
- }
+ if (!new)
+ goto free_ies;
memcpy(new, tmp, sizeof(*new));
new->refcount = 1;
INIT_LIST_HEAD(&new->hidden_list);
@@ -1864,8 +1866,12 @@ __cfg80211_bss_update(struct cfg80211_registered_device *rdev,
list_add(&new->hidden_list,
&hidden->hidden_list);
hidden->refcount++;
+
+ ies = (void *)rcu_access_pointer(new->pub.beacon_ies);
rcu_assign_pointer(new->pub.beacon_ies,
hidden->pub.beacon_ies);
+ if (ies)
+ kfree_rcu(ies, rcu_head);
}
} else {
/*
@@ -1902,6 +1908,16 @@ __cfg80211_bss_update(struct cfg80211_registered_device *rdev,
bss_ref_get(rdev, found);
return found;
+
+free_ies:
+ ies = (void *)rcu_dereference(tmp->pub.beacon_ies);
+ if (ies)
+ kfree_rcu(ies, rcu_head);
+ ies = (void *)rcu_dereference(tmp->pub.proberesp_ies);
+ if (ies)
+ kfree_rcu(ies, rcu_head);
+
+ return NULL;
}
struct cfg80211_internal_bss *
@@ -2044,6 +2060,9 @@ struct cfg80211_inform_single_bss_data {
struct cfg80211_bss *source_bss;
u8 max_bssid_indicator;
u8 bssid_index;
+
+ u8 use_for;
+ u64 cannot_use_reasons;
};
/* Returned bss is reference counted and must be cleaned up appropriately. */
@@ -2089,6 +2108,8 @@ cfg80211_inform_single_bss_data(struct wiphy *wiphy,
tmp.ts_boottime = drv_data->boottime_ns;
tmp.parent_tsf = drv_data->parent_tsf;
ether_addr_copy(tmp.parent_bssid, drv_data->parent_bssid);
+ tmp.pub.use_for = data->use_for;
+ tmp.pub.cannot_use_reasons = data->cannot_use_reasons;
if (data->bss_source != BSS_SOURCE_DIRECT) {
tmp.pub.transmitted_bss = data->source_bss;
@@ -2259,6 +2280,8 @@ cfg80211_parse_mbssid_data(struct wiphy *wiphy,
.beacon_interval = tx_data->beacon_interval,
.source_bss = source_bss,
.bss_source = BSS_SOURCE_MBSSID,
+ .use_for = tx_data->use_for,
+ .cannot_use_reasons = tx_data->cannot_use_reasons,
};
const u8 *mbssid_index_ie;
const struct element *elem, *sub;
@@ -2521,7 +2544,7 @@ error:
return NULL;
}
-static bool
+static u8
cfg80211_tbtt_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
const struct ieee80211_neighbor_ap_info **ap_info,
const u8 **tbtt_info)
@@ -2540,6 +2563,7 @@ cfg80211_tbtt_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
u16 params;
u8 length, i, count, mld_params_offset;
u8 type, lid;
+ u32 use_for;
info = (void *)pos;
count = u8_get_bits(info->tbtt_info_hdr,
@@ -2549,20 +2573,22 @@ cfg80211_tbtt_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
pos += sizeof(*info);
if (count * length > end - pos)
- return false;
+ return 0;
type = u8_get_bits(info->tbtt_info_hdr,
IEEE80211_AP_INFO_TBTT_HDR_TYPE);
- /* Only accept full TBTT information. NSTR mobile APs
- * use the shortened version, but we ignore them here.
- */
if (type == IEEE80211_TBTT_INFO_TYPE_TBTT &&
length >=
offsetofend(struct ieee80211_tbtt_info_ge_11,
mld_params)) {
mld_params_offset =
offsetof(struct ieee80211_tbtt_info_ge_11, mld_params);
+ use_for = NL80211_BSS_USE_FOR_ALL;
+ } else if (type == IEEE80211_TBTT_INFO_TYPE_MLD &&
+ length >= sizeof(struct ieee80211_rnr_mld_params)) {
+ mld_params_offset = 0;
+ use_for = NL80211_BSS_USE_FOR_MLD_LINK;
} else {
pos += count * length;
continue;
@@ -2580,7 +2606,7 @@ cfg80211_tbtt_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
*ap_info = info;
*tbtt_info = pos;
- return true;
+ return use_for;
}
pos += length;
@@ -2588,13 +2614,15 @@ cfg80211_tbtt_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
}
}
- return false;
+ return 0;
}
-static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
- struct cfg80211_inform_single_bss_data *tx_data,
- struct cfg80211_bss *source_bss,
- gfp_t gfp)
+static void
+cfg80211_parse_ml_elem_sta_data(struct wiphy *wiphy,
+ struct cfg80211_inform_single_bss_data *tx_data,
+ struct cfg80211_bss *source_bss,
+ const struct element *elem,
+ gfp_t gfp)
{
struct cfg80211_inform_single_bss_data data = {
.drv_data = tx_data->drv_data,
@@ -2603,9 +2631,9 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
.bss_source = BSS_SOURCE_STA_PROFILE,
};
struct ieee80211_multi_link_elem *ml_elem;
- const struct element *elem;
struct cfg80211_mle *mle;
u16 control;
+ u8 ml_common_len;
u8 *new_ie;
struct cfg80211_bss *bss;
int mld_id;
@@ -2613,15 +2641,7 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
const u8 *pos;
u8 i;
- if (!source_bss)
- return;
-
- if (tx_data->ftype != CFG80211_BSS_FTYPE_PRESP)
- return;
-
- elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK,
- tx_data->ie, tx_data->ielen);
- if (!elem || !ieee80211_mle_size_ok(elem->data + 1, elem->datalen - 1))
+ if (!ieee80211_mle_size_ok(elem->data + 1, elem->datalen - 1))
return;
ml_elem = (void *)elem->data + 1;
@@ -2636,6 +2656,8 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
!(control & IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP))
return;
+ ml_common_len = ml_elem->variable[0];
+
/* length + MLD MAC address + link ID info + BSS Params Change Count */
pos = ml_elem->variable + 1 + 6 + 1 + 1;
@@ -2647,8 +2669,11 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
/* MLD capabilities and operations */
pos += 2;
- /* Not included when the (nontransmitted) AP is responding itself,
- * but defined to zero then (Draft P802.11be_D3.0, 9.4.2.170.2)
+ /*
+ * The MLD ID of the reporting AP is always zero. It is set if the AP
+ * is part of an MBSSID set and will be non-zero for ML Elements
+ * relating to a nontransmitted BSS (matching the Multi-BSSID Index,
+ * Draft P802.11be_D3.2, 35.3.4.2)
*/
if (u16_get_bits(control, IEEE80211_MLC_BASIC_PRES_MLD_ID)) {
mld_id = *pos;
@@ -2676,7 +2701,7 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
const u8 *profile;
const u8 *tbtt_info;
ssize_t profile_len;
- u8 link_id;
+ u8 link_id, use_for;
if (!ieee80211_mle_basic_sta_prof_size_ok((u8 *)mle->sta_prof[i],
mle->sta_prof_len[i]))
@@ -2718,9 +2743,11 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
profile_len -= 2;
/* Find in RNR to look up channel information */
- if (!cfg80211_tbtt_info_for_mld_ap(tx_data->ie, tx_data->ielen,
- mld_id, link_id,
- &ap_info, &tbtt_info))
+ use_for = cfg80211_tbtt_info_for_mld_ap(tx_data->ie,
+ tx_data->ielen,
+ mld_id, link_id,
+ &ap_info, &tbtt_info);
+ if (!use_for)
continue;
/* We could sanity check the BSSID is included */
@@ -2732,6 +2759,14 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
freq = ieee80211_channel_to_freq_khz(ap_info->channel, band);
data.channel = ieee80211_get_channel_khz(wiphy, freq);
+ if (use_for == NL80211_BSS_USE_FOR_MLD_LINK &&
+ !(wiphy->flags & WIPHY_FLAG_SUPPORTS_NSTR_NONPRIMARY)) {
+ use_for = 0;
+ data.cannot_use_reasons =
+ NL80211_BSS_CANNOT_USE_NSTR_NONPRIMARY;
+ }
+ data.use_for = use_for;
+
/* Generate new elements */
memset(new_ie, 0, IEEE80211_MAX_DATA_LEN);
data.ie = new_ie;
@@ -2742,6 +2777,34 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
if (!data.ielen)
continue;
+ /* The generated elements do not contain:
+ * - Basic ML element
+ * - A TBTT entry in the RNR for the transmitting AP
+ *
+ * This information is needed both internally and in userspace
+ * as such, we should append it here.
+ */
+ if (data.ielen + 3 + sizeof(*ml_elem) + ml_common_len >
+ IEEE80211_MAX_DATA_LEN)
+ continue;
+
+ /* Copy the Basic Multi-Link element including the common
+ * information, and then fix up the link ID.
+ * Note that the ML element length has been verified and we
+ * also checked that it contains the link ID.
+ */
+ new_ie[data.ielen++] = WLAN_EID_EXTENSION;
+ new_ie[data.ielen++] = 1 + sizeof(*ml_elem) + ml_common_len;
+ new_ie[data.ielen++] = WLAN_EID_EXT_EHT_MULTI_LINK;
+ memcpy(new_ie + data.ielen, ml_elem,
+ sizeof(*ml_elem) + ml_common_len);
+
+ new_ie[data.ielen + sizeof(*ml_elem) + 1 + ETH_ALEN] = link_id;
+
+ data.ielen += sizeof(*ml_elem) + ml_common_len;
+
+ /* TODO: Add an RNR containing only the reporting AP */
+
bss = cfg80211_inform_single_bss_data(wiphy, &data, gfp);
if (!bss)
break;
@@ -2753,6 +2816,25 @@ out:
kfree(mle);
}
+static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
+ struct cfg80211_inform_single_bss_data *tx_data,
+ struct cfg80211_bss *source_bss,
+ gfp_t gfp)
+{
+ const struct element *elem;
+
+ if (!source_bss)
+ return;
+
+ if (tx_data->ftype != CFG80211_BSS_FTYPE_PRESP)
+ return;
+
+ for_each_element_extid(elem, WLAN_EID_EXT_EHT_MULTI_LINK,
+ tx_data->ie, tx_data->ielen)
+ cfg80211_parse_ml_elem_sta_data(wiphy, tx_data, source_bss,
+ elem, gfp);
+}
+
struct cfg80211_bss *
cfg80211_inform_bss_data(struct wiphy *wiphy,
struct cfg80211_inform_bss *data,
@@ -2769,6 +2851,10 @@ cfg80211_inform_bss_data(struct wiphy *wiphy,
.beacon_interval = beacon_interval,
.ie = ie,
.ielen = ielen,
+ .use_for = data->restrict_use ?
+ data->use_for :
+ NL80211_BSS_USE_FOR_ALL,
+ .cannot_use_reasons = data->cannot_use_reasons,
};
struct cfg80211_bss *res;
@@ -2786,6 +2872,36 @@ cfg80211_inform_bss_data(struct wiphy *wiphy,
}
EXPORT_SYMBOL(cfg80211_inform_bss_data);
+static bool cfg80211_uhb_power_type_valid(const u8 *ie,
+ size_t ielen,
+ const u32 flags)
+{
+ const struct element *tmp;
+ struct ieee80211_he_operation *he_oper;
+
+ tmp = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ielen);
+ if (tmp && tmp->datalen >= sizeof(*he_oper) + 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 false;
+
+ switch (u8_get_bits(he_6ghz_oper->control,
+ IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
+ case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
+ return true;
+ case IEEE80211_6GHZ_CTRL_REG_SP_AP:
+ return !(flags & IEEE80211_CHAN_NO_UHB_AFC_CLIENT);
+ case IEEE80211_6GHZ_CTRL_REG_VLP_AP:
+ return !(flags & IEEE80211_CHAN_NO_UHB_VLP_CLIENT);
+ }
+ }
+ return false;
+}
+
/* cfg80211_inform_bss_width_frame helper */
static struct cfg80211_bss *
cfg80211_inform_single_bss_frame_data(struct wiphy *wiphy,
@@ -2844,6 +2960,14 @@ cfg80211_inform_single_bss_frame_data(struct wiphy *wiphy,
if (!channel)
return NULL;
+ if (channel->band == NL80211_BAND_6GHZ &&
+ !cfg80211_uhb_power_type_valid(variable, ielen, channel->flags)) {
+ data->restrict_use = 1;
+ data->use_for = 0;
+ data->cannot_use_reasons =
+ NL80211_BSS_CANNOT_USE_UHB_PWR_MISMATCH;
+ }
+
if (ext) {
const struct ieee80211_s1g_bcn_compat_ie *compat;
const struct element *elem;
@@ -2899,6 +3023,10 @@ cfg80211_inform_single_bss_frame_data(struct wiphy *wiphy,
tmp.pub.chains = data->chains;
memcpy(tmp.pub.chain_signal, data->chain_signal, IEEE80211_MAX_CHAINS);
ether_addr_copy(tmp.parent_bssid, data->parent_bssid);
+ tmp.pub.use_for = data->restrict_use ?
+ data->use_for :
+ NL80211_BSS_USE_FOR_ALL;
+ tmp.pub.cannot_use_reasons = data->cannot_use_reasons;
signal_valid = data->chan == channel;
spin_lock_bh(&rdev->bss_lock);
@@ -2930,6 +3058,10 @@ cfg80211_inform_bss_frame_data(struct wiphy *wiphy,
.ie = mgmt->u.probe_resp.variable,
.ielen = len - offsetof(struct ieee80211_mgmt,
u.probe_resp.variable),
+ .use_for = data->restrict_use ?
+ data->use_for :
+ NL80211_BSS_USE_FOR_ALL,
+ .cannot_use_reasons = data->cannot_use_reasons,
};
struct cfg80211_bss *res;
@@ -3080,10 +3212,9 @@ void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev,
if (new) {
/* to save time, update IEs for transmitting bss only */
- if (cfg80211_update_known_bss(rdev, cbss, new, false)) {
- new->pub.proberesp_ies = NULL;
- new->pub.beacon_ies = NULL;
- }
+ cfg80211_update_known_bss(rdev, cbss, new, false);
+ new->pub.proberesp_ies = NULL;
+ new->pub.beacon_ies = NULL;
list_for_each_entry_safe(nontrans_bss, tmp,
&new->pub.nontrans_list,
generated by cgit (git 2.34.1) at 2024-06-04 18:44:21 +0000