diff options
author | Benjamin Berg <benjamin.berg@intel.com> | 2024-03-18 18:53:29 +0200 |
---|---|---|
committer | Johannes Berg <johannes.berg@intel.com> | 2024-03-25 15:38:15 +0100 |
commit | 97f8df4db4c8ef50b659d8b228c1f42fe111e7c8 (patch) | |
tree | 591213656250231cad00223a762dcec8dec3ec0b /net | |
parent | c7378d7d8be0b44d03c990a2686e64d038c694a5 (diff) |
wifi: cfg80211: ignore non-TX BSSs in per-STA profile
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: 2481b5da9c6b ("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>
Diffstat (limited to 'net')
-rw-r--r-- | net/wireless/scan.c | 47 |
1 files changed, 38 insertions, 9 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c index 8ac2d19d8ede..127853877a0a 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -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, - ¶m_ch_count); + ¶m_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, |