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wifi: cfg80211: ignore non-TX BSSs in per-STA profile

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If a non-TX BSS is included in a per-STA profile, then we cannot set
transmitted_bss for it. Even worse, if we do things properly we should
be configuring both bssid_index and max_bssid_indicator correctly. We do
not actually have both pieces of information (and, some APs currently
do not include either).

So, ignore any per-STA profile where the RNR says that the BSS is not
transmitted. Also fix transmitted_bss to never be set for per-STA
profiles.

This fixes issues where mac80211 was setting the reference BSSID to an
incorrect value.

Fixes: 2481b5da9c ("wifi: cfg80211: handle BSS data contained in ML probe responses")
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240318184907.6a0babed655a.Iad447fea417c63f683da793556b97c31d07a4aab@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Berg 2024-03-18 18:53:29 +02:00 committed by Johannes Berg
parent c7378d7d8b
commit 97f8df4db4
1 changed files with 38 additions and 9 deletions
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47
net/wireless/scan.c
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@ -2211,12 +2211,16 @@ cfg80211_inform_single_bss_data(struct wiphy *wiphy,
tmp.pub.use_for = data->use_for;
tmp.pub.cannot_use_reasons = data->cannot_use_reasons;
if (data->bss_source != BSS_SOURCE_DIRECT) {
switch (data->bss_source) {
case BSS_SOURCE_MBSSID:
tmp.pub.transmitted_bss = data->source_bss;
fallthrough;
case BSS_SOURCE_STA_PROFILE:
ts = bss_from_pub(data->source_bss)->ts;
tmp.pub.bssid_index = data->bssid_index;
tmp.pub.max_bssid_indicator = data->max_bssid_indicator;
} else {
break;
case BSS_SOURCE_DIRECT:
ts = jiffies;
if (channel->band == NL80211_BAND_60GHZ) {
@ -2231,6 +2235,7 @@ cfg80211_inform_single_bss_data(struct wiphy *wiphy,
regulatory_hint_found_beacon(wiphy, channel,
gfp);
}
break;
}
/*
@ -2660,6 +2665,7 @@ struct tbtt_info_iter_data {
u8 param_ch_count;
u32 use_for;
u8 mld_id, link_id;
bool non_tx;
};
static enum cfg80211_rnr_iter_ret
@ -2670,14 +2676,20 @@ cfg802121_mld_ap_rnr_iter(void *_data, u8 type,
const struct ieee80211_rnr_mld_params *mld_params;
struct tbtt_info_iter_data *data = _data;
u8 link_id;
bool non_tx = false;
if (type == IEEE80211_TBTT_INFO_TYPE_TBTT &&
tbtt_info_len >= offsetofend(struct ieee80211_tbtt_info_ge_11,
mld_params))
mld_params = (void *)(tbtt_info +
offsetof(struct ieee80211_tbtt_info_ge_11,
mld_params));
else if (type == IEEE80211_TBTT_INFO_TYPE_MLD &&
mld_params)) {
const struct ieee80211_tbtt_info_ge_11 *tbtt_info_ge_11 =
(void *)tbtt_info;
non_tx = (tbtt_info_ge_11->bss_params &
(IEEE80211_RNR_TBTT_PARAMS_MULTI_BSSID |
IEEE80211_RNR_TBTT_PARAMS_TRANSMITTED_BSSID)) ==
IEEE80211_RNR_TBTT_PARAMS_MULTI_BSSID;
mld_params = &tbtt_info_ge_11->mld_params;
} else if (type == IEEE80211_TBTT_INFO_TYPE_MLD &&
tbtt_info_len >= sizeof(struct ieee80211_rnr_mld_params))
mld_params = (void *)tbtt_info;
else
@ -2696,6 +2708,7 @@ cfg802121_mld_ap_rnr_iter(void *_data, u8 type,
data->param_ch_count =
le16_get_bits(mld_params->params,
IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT);
data->non_tx = non_tx;
if (type == IEEE80211_TBTT_INFO_TYPE_TBTT)
data->use_for = NL80211_BSS_USE_FOR_ALL;
@ -2707,7 +2720,7 @@ cfg802121_mld_ap_rnr_iter(void *_data, u8 type,
static u8
cfg80211_rnr_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
const struct ieee80211_neighbor_ap_info **ap_info,
u8 *param_ch_count)
u8 *param_ch_count, bool *non_tx)
{
struct tbtt_info_iter_data data = {
.mld_id = mld_id,
@ -2718,6 +2731,7 @@ cfg80211_rnr_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
*ap_info = data.ap_info;
*param_ch_count = data.param_ch_count;
*non_tx = data.non_tx;
return data.use_for;
}
@ -2897,6 +2911,7 @@ cfg80211_parse_ml_elem_sta_data(struct wiphy *wiphy,
ssize_t profile_len;
u8 param_ch_count;
u8 link_id, use_for;
bool non_tx;
if (!ieee80211_mle_basic_sta_prof_size_ok((u8 *)mle->sta_prof[i],
mle->sta_prof_len[i]))
@ -2942,10 +2957,24 @@ cfg80211_parse_ml_elem_sta_data(struct wiphy *wiphy,
tx_data->ielen,
mld_id, link_id,
&ap_info,
&param_ch_count);
&param_ch_count,
&non_tx);
if (!use_for)
continue;
/*
* As of 802.11be_D5.0, the specification does not give us any
* way of discovering both the MaxBSSID and the Multiple-BSSID
* Index. It does seem like the Multiple-BSSID Index element
* may be provided, but section 9.4.2.45 explicitly forbids
* including a Multiple-BSSID Element (in this case without any
* subelements).
* Without both pieces of information we cannot calculate the
* reference BSSID, so simply ignore the BSS.
*/
if (non_tx)
continue;
/* We could sanity check the BSSID is included */
if (!ieee80211_operating_class_to_band(ap_info->op_class,