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-rw-r--r--net/mac80211/mlme.c167
1 files changed, 162 insertions, 5 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 0aee2392dd29..60792dfabc9d 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -8,7 +8,7 @@
* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright (C) 2015 - 2017 Intel Deutschland GmbH
- * Copyright (C) 2018 - 2022 Intel Corporation
+ * Copyright (C) 2018 - 2023 Intel Corporation
*/
#include <linux/delay.h>
@@ -89,6 +89,80 @@ MODULE_PARM_DESC(probe_wait_ms,
#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
/*
+ * Extract from the given disabled subchannel bitmap (raw format
+ * from the EHT Operation Element) the bits for the subchannel
+ * we're using right now.
+ */
+static u16
+ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation *eht_oper,
+ struct cfg80211_chan_def *chandef, u16 bitmap)
+{
+ struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional;
+ struct cfg80211_chan_def ap_chandef = *chandef;
+ u32 ap_center_freq, local_center_freq;
+ u32 ap_bw, local_bw;
+ int ap_start_freq, local_start_freq;
+ u16 shift, mask;
+
+ if (!(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) ||
+ !(eht_oper->params &
+ IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT))
+ return 0;
+
+ /* set 160/320 supported to get the full AP definition */
+ ieee80211_chandef_eht_oper(eht_oper, true, true, &ap_chandef);
+ ap_center_freq = ap_chandef.center_freq1;
+ ap_bw = 20 * BIT(u8_get_bits(info->control,
+ IEEE80211_EHT_OPER_CHAN_WIDTH));
+ ap_start_freq = ap_center_freq - ap_bw / 2;
+ local_center_freq = chandef->center_freq1;
+ local_bw = 20 * BIT(ieee80211_chan_width_to_rx_bw(chandef->width));
+ local_start_freq = local_center_freq - local_bw / 2;
+ shift = (local_start_freq - ap_start_freq) / 20;
+ mask = BIT(local_bw / 20) - 1;
+
+ return (bitmap >> shift) & mask;
+}
+
+/*
+ * Handle the puncturing bitmap, possibly downgrading bandwidth to get a
+ * valid bitmap.
+ */
+static void
+ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link,
+ const struct ieee80211_eht_operation *eht_oper,
+ u16 bitmap, u64 *changed)
+{
+ struct cfg80211_chan_def *chandef = &link->conf->chandef;
+ u16 extracted;
+ u64 _changed = 0;
+
+ if (!changed)
+ changed = &_changed;
+
+ while (chandef->width > NL80211_CHAN_WIDTH_40) {
+ extracted =
+ ieee80211_extract_dis_subch_bmap(eht_oper, chandef,
+ bitmap);
+
+ if (cfg80211_valid_disable_subchannel_bitmap(&bitmap,
+ chandef))
+ break;
+ link->u.mgd.conn_flags |=
+ ieee80211_chandef_downgrade(chandef);
+ *changed |= BSS_CHANGED_BANDWIDTH;
+ }
+
+ if (chandef->width <= NL80211_CHAN_WIDTH_40)
+ extracted = 0;
+
+ if (link->conf->eht_puncturing != extracted) {
+ link->conf->eht_puncturing = extracted;
+ *changed |= BSS_CHANGED_EHT_PUNCTURING;
+ }
+}
+
+/*
* We can have multiple work items (and connection probing)
* scheduling this timer, but we need to take care to only
* reschedule it when it should fire _earlier_ than it was
@@ -413,7 +487,7 @@ static int ieee80211_config_bw(struct ieee80211_link_data *link,
const struct ieee80211_he_operation *he_oper,
const struct ieee80211_eht_operation *eht_oper,
const struct ieee80211_s1g_oper_ie *s1g_oper,
- const u8 *bssid, u32 *changed)
+ const u8 *bssid, u64 *changed)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
@@ -1704,7 +1778,7 @@ static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link)
return;
}
- cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0);
+ cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0, 0);
}
void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
@@ -1914,7 +1988,7 @@ ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
mutex_unlock(&local->mtx);
cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0,
- csa_ie.count, csa_ie.mode);
+ csa_ie.count, csa_ie.mode, 0);
if (local->ops->channel_switch) {
/* use driver's channel switch callback */
@@ -4145,6 +4219,7 @@ static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link,
link_sta);
bss_conf->eht_support = link_sta->pub->eht_cap.has_eht;
+ *changed |= BSS_CHANGED_EHT_PUNCTURING;
} else {
bss_conf->eht_support = false;
}
@@ -5477,6 +5552,45 @@ static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
}
+static bool ieee80211_config_puncturing(struct ieee80211_link_data *link,
+ const struct ieee80211_eht_operation *eht_oper,
+ u64 *changed)
+{
+ u16 bitmap = 0, extracted;
+
+ if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) &&
+ (eht_oper->params &
+ IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) {
+ const struct ieee80211_eht_operation_info *info =
+ (void *)eht_oper->optional;
+ const u8 *disable_subchannel_bitmap = info->optional;
+
+ bitmap = get_unaligned_le16(disable_subchannel_bitmap);
+ }
+
+ extracted = ieee80211_extract_dis_subch_bmap(eht_oper,
+ &link->conf->chandef,
+ bitmap);
+
+ /* accept if there are no changes */
+ if (!(*changed & BSS_CHANGED_BANDWIDTH) &&
+ extracted == link->conf->eht_puncturing)
+ return true;
+
+ if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap,
+ &link->conf->chandef)) {
+ link_info(link,
+ "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n",
+ link->u.mgd.bssid,
+ bitmap,
+ link->conf->chandef.width);
+ return false;
+ }
+
+ ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed);
+ return true;
+}
+
static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
struct ieee80211_hdr *hdr, size_t len,
struct ieee80211_rx_status *rx_status)
@@ -5494,7 +5608,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
struct ieee80211_channel *chan;
struct link_sta_info *link_sta;
struct sta_info *sta;
- u32 changed = 0;
+ u64 changed = 0;
bool erp_valid;
u8 erp_value = 0;
u32 ncrc = 0;
@@ -5791,6 +5905,21 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
elems->pwr_constr_elem,
elems->cisco_dtpc_elem);
+ if (elems->eht_operation &&
+ !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) {
+ if (!ieee80211_config_puncturing(link, elems->eht_operation,
+ &changed)) {
+ ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
+ WLAN_REASON_DEAUTH_LEAVING,
+ true, deauth_buf);
+ ieee80211_report_disconnect(sdata, deauth_buf,
+ sizeof(deauth_buf), true,
+ WLAN_REASON_DEAUTH_LEAVING,
+ false);
+ goto free;
+ }
+ }
+
ieee80211_link_info_change_notify(sdata, link, changed);
free:
kfree(elems);
@@ -6892,9 +7021,12 @@ ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
}
+ link->conf->eht_puncturing = 0;
+
rcu_read_lock();
beacon_ies = rcu_dereference(cbss->beacon_ies);
if (beacon_ies) {
+ const struct ieee80211_eht_operation *eht_oper;
const struct element *elem;
u8 dtim_count = 0;
@@ -6923,6 +7055,31 @@ ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
link->conf->ema_ap = true;
else
link->conf->ema_ap = false;
+
+ elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION,
+ beacon_ies->data, beacon_ies->len);
+ eht_oper = (const void *)(elem->data + 1);
+
+ if (elem &&
+ ieee80211_eht_oper_size_ok((const void *)(elem->data + 1),
+ elem->datalen - 1) &&
+ (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) &&
+ (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) {
+ const struct ieee80211_eht_operation_info *info =
+ (void *)eht_oper->optional;
+ const u8 *disable_subchannel_bitmap = info->optional;
+ u16 bitmap;
+
+ bitmap = get_unaligned_le16(disable_subchannel_bitmap);
+ if (cfg80211_valid_disable_subchannel_bitmap(&bitmap,
+ &link->conf->chandef))
+ ieee80211_handle_puncturing_bitmap(link,
+ eht_oper,
+ bitmap,
+ NULL);
+ else
+ conn_flags |= IEEE80211_CONN_DISABLE_EHT;
+ }
}
rcu_read_unlock();
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 05:15:04 +0000