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linuxdebug/net/mac80211/mlme.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* BSS client mode implementation
* Copyright 2003-2008, Jouni Malinen <j@w1.fi>
* Copyright 2004, Instant802 Networks, Inc.
* Copyright 2005, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* 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
*/
#include <linux/delay.h>
#include <linux/fips.h>
#include <linux/if_ether.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/moduleparam.h>
#include <linux/rtnetlink.h>
#include <linux/crc32.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <net/mac80211.h>
#include <asm/unaligned.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "led.h"
#include "fils_aead.h"
#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
#define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2)
#define IEEE80211_AUTH_MAX_TRIES 3
#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
#define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2)
#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
#define IEEE80211_ASSOC_MAX_TRIES 3
static int max_nullfunc_tries = 2;
module_param(max_nullfunc_tries, int, 0644);
MODULE_PARM_DESC(max_nullfunc_tries,
"Maximum nullfunc tx tries before disconnecting (reason 4).");
static int max_probe_tries = 5;
module_param(max_probe_tries, int, 0644);
MODULE_PARM_DESC(max_probe_tries,
"Maximum probe tries before disconnecting (reason 4).");
/*
* Beacon loss timeout is calculated as N frames times the
* advertised beacon interval. This may need to be somewhat
* higher than what hardware might detect to account for
* delays in the host processing frames. But since we also
* probe on beacon miss before declaring the connection lost
* default to what we want.
*/
static int beacon_loss_count = 7;
module_param(beacon_loss_count, int, 0644);
MODULE_PARM_DESC(beacon_loss_count,
"Number of beacon intervals before we decide beacon was lost.");
/*
* Time the connection can be idle before we probe
* it to see if we can still talk to the AP.
*/
#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
/*
* Time we wait for a probe response after sending
* a probe request because of beacon loss or for
* checking the connection still works.
*/
static int probe_wait_ms = 500;
module_param(probe_wait_ms, int, 0644);
MODULE_PARM_DESC(probe_wait_ms,
"Maximum time(ms) to wait for probe response"
" before disconnecting (reason 4).");
/*
* How many Beacon frames need to have been used in average signal strength
* before starting to indicate signal change events.
*/
#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
/*
* 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
* asked for before, or if it's not pending right now. This
* function ensures that. Note that it then is required to
* run this function for all timeouts after the first one
* has happened -- the work that runs from this timer will
* do that.
*/
static void run_again(struct ieee80211_sub_if_data *sdata,
unsigned long timeout)
{
sdata_assert_lock(sdata);
if (!timer_pending(&sdata->u.mgd.timer) ||
time_before(timeout, sdata->u.mgd.timer.expires))
mod_timer(&sdata->u.mgd.timer, timeout);
}
void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
{
if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
return;
if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
return;
mod_timer(&sdata->u.mgd.bcn_mon_timer,
round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
}
void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
if (unlikely(!ifmgd->associated))
return;
if (ifmgd->probe_send_count)
ifmgd->probe_send_count = 0;
if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
return;
mod_timer(&ifmgd->conn_mon_timer,
round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
}
static int ecw2cw(int ecw)
{
return (1 << ecw) - 1;
}
static ieee80211_conn_flags_t
ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
struct ieee80211_link_data *link,
ieee80211_conn_flags_t conn_flags,
struct ieee80211_supported_band *sband,
struct ieee80211_channel *channel,
u32 vht_cap_info,
const struct ieee80211_ht_operation *ht_oper,
const struct ieee80211_vht_operation *vht_oper,
const struct ieee80211_he_operation *he_oper,
const struct ieee80211_eht_operation *eht_oper,
const struct ieee80211_s1g_oper_ie *s1g_oper,
struct cfg80211_chan_def *chandef, bool tracking)
{
struct cfg80211_chan_def vht_chandef;
struct ieee80211_sta_ht_cap sta_ht_cap;
ieee80211_conn_flags_t ret;
u32 ht_cfreq;
memset(chandef, 0, sizeof(struct cfg80211_chan_def));
chandef->chan = channel;
chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
chandef->center_freq1 = channel->center_freq;
chandef->freq1_offset = channel->freq_offset;
if (channel->band == NL80211_BAND_6GHZ) {
if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper,
chandef)) {
mlme_dbg(sdata,
"bad 6 GHz operation, disabling HT/VHT/HE/EHT\n");
ret = IEEE80211_CONN_DISABLE_HT |
IEEE80211_CONN_DISABLE_VHT |
IEEE80211_CONN_DISABLE_HE |
IEEE80211_CONN_DISABLE_EHT;
} else {
ret = 0;
}
vht_chandef = *chandef;
goto out;
} else if (sband->band == NL80211_BAND_S1GHZ) {
if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) {
sdata_info(sdata,
"Missing S1G Operation Element? Trying operating == primary\n");
chandef->width = ieee80211_s1g_channel_width(channel);
}
ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ |
IEEE80211_CONN_DISABLE_VHT |
IEEE80211_CONN_DISABLE_80P80MHZ |
IEEE80211_CONN_DISABLE_160MHZ;
goto out;
}
memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
if (!ht_oper || !sta_ht_cap.ht_supported) {
mlme_dbg(sdata, "HT operation missing / HT not supported\n");
ret = IEEE80211_CONN_DISABLE_HT |
IEEE80211_CONN_DISABLE_VHT |
IEEE80211_CONN_DISABLE_HE |
IEEE80211_CONN_DISABLE_EHT;
goto out;
}
chandef->width = NL80211_CHAN_WIDTH_20;
ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
channel->band);
/* check that channel matches the right operating channel */
if (!tracking && channel->center_freq != ht_cfreq) {
/*
* It's possible that some APs are confused here;
* Netgear WNDR3700 sometimes reports 4 higher than
* the actual channel in association responses, but
* since we look at probe response/beacon data here
* it should be OK.
*/
sdata_info(sdata,
"Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
channel->center_freq, ht_cfreq,
ht_oper->primary_chan, channel->band);
ret = IEEE80211_CONN_DISABLE_HT |
IEEE80211_CONN_DISABLE_VHT |
IEEE80211_CONN_DISABLE_HE |
IEEE80211_CONN_DISABLE_EHT;
goto out;
}
/* check 40 MHz support, if we have it */
if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
ieee80211_chandef_ht_oper(ht_oper, chandef);
} else {
mlme_dbg(sdata, "40 MHz not supported\n");
/* 40 MHz (and 80 MHz) must be supported for VHT */
ret = IEEE80211_CONN_DISABLE_VHT;
/* also mark 40 MHz disabled */
ret |= IEEE80211_CONN_DISABLE_40MHZ;
goto out;
}
if (!vht_oper || !sband->vht_cap.vht_supported) {
mlme_dbg(sdata, "VHT operation missing / VHT not supported\n");
ret = IEEE80211_CONN_DISABLE_VHT;
goto out;
}
vht_chandef = *chandef;
if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) &&
he_oper &&
(le32_to_cpu(he_oper->he_oper_params) &
IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
struct ieee80211_vht_operation he_oper_vht_cap;
/*
* Set only first 3 bytes (other 2 aren't used in
* ieee80211_chandef_vht_oper() anyway)
*/
memcpy(&he_oper_vht_cap, he_oper->optional, 3);
he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
&he_oper_vht_cap, ht_oper,
&vht_chandef)) {
if (!(conn_flags & IEEE80211_CONN_DISABLE_HE))
sdata_info(sdata,
"HE AP VHT information is invalid, disabling HE\n");
ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT;
goto out;
}
} else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
vht_cap_info,
vht_oper, ht_oper,
&vht_chandef)) {
if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
sdata_info(sdata,
"AP VHT information is invalid, disabling VHT\n");
ret = IEEE80211_CONN_DISABLE_VHT;
goto out;
}
if (!cfg80211_chandef_valid(&vht_chandef)) {
if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
sdata_info(sdata,
"AP VHT information is invalid, disabling VHT\n");
ret = IEEE80211_CONN_DISABLE_VHT;
goto out;
}
if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
ret = 0;
goto out;
}
if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
sdata_info(sdata,
"AP VHT information doesn't match HT, disabling VHT\n");
ret = IEEE80211_CONN_DISABLE_VHT;
goto out;
}
*chandef = vht_chandef;
/*
* handle the case that the EHT operation indicates that it holds EHT
* operation information (in case that the channel width differs from
* the channel width reported in HT/VHT/HE).
*/
if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
struct cfg80211_chan_def eht_chandef = *chandef;
ieee80211_chandef_eht_oper(eht_oper,
eht_chandef.width ==
NL80211_CHAN_WIDTH_160,
false, &eht_chandef);
if (!cfg80211_chandef_valid(&eht_chandef)) {
if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT))
sdata_info(sdata,
"AP EHT information is invalid, disabling EHT\n");
ret = IEEE80211_CONN_DISABLE_EHT;
goto out;
}
if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) {
if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT))
sdata_info(sdata,
"AP EHT information is incompatible, disabling EHT\n");
ret = IEEE80211_CONN_DISABLE_EHT;
goto out;
}
*chandef = eht_chandef;
}
ret = 0;
out:
/*
* When tracking the current AP, don't do any further checks if the
* new chandef is identical to the one we're currently using for the
* connection. This keeps us from playing ping-pong with regulatory,
* without it the following can happen (for example):
* - connect to an AP with 80 MHz, world regdom allows 80 MHz
* - AP advertises regdom US
* - CRDA loads regdom US with 80 MHz prohibited (old database)
* - the code below detects an unsupported channel, downgrades, and
* we disconnect from the AP in the caller
* - disconnect causes CRDA to reload world regdomain and the game
* starts anew.
* (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
*
* It seems possible that there are still scenarios with CSA or real
* bandwidth changes where a this could happen, but those cases are
* less common and wouldn't completely prevent using the AP.
*/
if (tracking &&
cfg80211_chandef_identical(chandef, &link->conf->chandef))
return ret;
/* don't print the message below for VHT mismatch if VHT is disabled */
if (ret & IEEE80211_CONN_DISABLE_VHT)
vht_chandef = *chandef;
/*
* Ignore the DISABLED flag when we're already connected and only
* tracking the APs beacon for bandwidth changes - otherwise we
* might get disconnected here if we connect to an AP, update our
* regulatory information based on the AP's country IE and the
* information we have is wrong/outdated and disables the channel
* that we're actually using for the connection to the AP.
*/
while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
tracking ? 0 :
IEEE80211_CHAN_DISABLED)) {
if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
ret = IEEE80211_CONN_DISABLE_HT |
IEEE80211_CONN_DISABLE_VHT |
IEEE80211_CONN_DISABLE_HE |
IEEE80211_CONN_DISABLE_EHT;
break;
}
ret |= ieee80211_chandef_downgrade(chandef);
}
if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
IEEE80211_CHAN_NO_HE))
ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT;
if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
IEEE80211_CHAN_NO_EHT))
ret |= IEEE80211_CONN_DISABLE_EHT;
if (chandef->width != vht_chandef.width && !tracking)
sdata_info(sdata,
"capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
return ret;
}
static int ieee80211_config_bw(struct ieee80211_link_data *link,
const struct ieee80211_ht_cap *ht_cap,
const struct ieee80211_vht_cap *vht_cap,
const struct ieee80211_ht_operation *ht_oper,
const struct ieee80211_vht_operation *vht_oper,
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)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_channel *chan = link->conf->chandef.chan;
struct ieee80211_supported_band *sband =
local->hw.wiphy->bands[chan->band];
struct cfg80211_chan_def chandef;
u16 ht_opmode;
ieee80211_conn_flags_t flags;
u32 vht_cap_info = 0;
int ret;
/* if HT was/is disabled, don't track any bandwidth changes */
if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper)
return 0;
/* don't check VHT if we associated as non-VHT station */
if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)
vht_oper = NULL;
/* don't check HE if we associated as non-HE station */
if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE ||
!ieee80211_get_he_iftype_cap(sband,
ieee80211_vif_type_p2p(&sdata->vif))) {
he_oper = NULL;
eht_oper = NULL;
}
/* don't check EHT if we associated as non-EHT station */
if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT ||
!ieee80211_get_eht_iftype_cap(sband,
ieee80211_vif_type_p2p(&sdata->vif)))
eht_oper = NULL;
/*
* if bss configuration changed store the new one -
* this may be applicable even if channel is identical
*/
ht_opmode = le16_to_cpu(ht_oper->operation_mode);
if (link->conf->ht_operation_mode != ht_opmode) {
*changed |= BSS_CHANGED_HT;
link->conf->ht_operation_mode = ht_opmode;
}
if (vht_cap)
vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info);
/* calculate new channel (type) based on HT/VHT/HE operation IEs */
flags = ieee80211_determine_chantype(sdata, link,
link->u.mgd.conn_flags,
sband, chan, vht_cap_info,
ht_oper, vht_oper,
he_oper, eht_oper,
s1g_oper, &chandef, true);
/*
* Downgrade the new channel if we associated with restricted
* capabilities. For example, if we associated as a 20 MHz STA
* to a 40 MHz AP (due to regulatory, capabilities or config
* reasons) then switching to a 40 MHz channel now won't do us
* any good -- we couldn't use it with the AP.
*/
if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ &&
chandef.width == NL80211_CHAN_WIDTH_80P80)
flags |= ieee80211_chandef_downgrade(&chandef);
if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ &&
chandef.width == NL80211_CHAN_WIDTH_160)
flags |= ieee80211_chandef_downgrade(&chandef);
if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ &&
chandef.width > NL80211_CHAN_WIDTH_20)
flags |= ieee80211_chandef_downgrade(&chandef);
if (cfg80211_chandef_identical(&chandef, &link->conf->chandef))
return 0;
link_info(link,
"AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n",
link->u.mgd.bssid, chandef.chan->center_freq,
chandef.chan->freq_offset, chandef.width,
chandef.center_freq1, chandef.freq1_offset,
chandef.center_freq2);
if (flags != (link->u.mgd.conn_flags &
(IEEE80211_CONN_DISABLE_HT |
IEEE80211_CONN_DISABLE_VHT |
IEEE80211_CONN_DISABLE_HE |
IEEE80211_CONN_DISABLE_EHT |
IEEE80211_CONN_DISABLE_40MHZ |
IEEE80211_CONN_DISABLE_80P80MHZ |
IEEE80211_CONN_DISABLE_160MHZ |
IEEE80211_CONN_DISABLE_320MHZ)) ||
!cfg80211_chandef_valid(&chandef)) {
sdata_info(sdata,
"AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n",
link->u.mgd.bssid, flags, ifmgd->flags);
return -EINVAL;
}
ret = ieee80211_link_change_bandwidth(link, &chandef, changed);
if (ret) {
sdata_info(sdata,
"AP %pM changed bandwidth to incompatible one - disconnect\n",
link->u.mgd.bssid);
return ret;
}
return 0;
}
/* frame sending functions */
static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb, u8 ap_ht_param,
struct ieee80211_supported_band *sband,
struct ieee80211_channel *channel,
enum ieee80211_smps_mode smps,
ieee80211_conn_flags_t conn_flags)
{
u8 *pos;
u32 flags = channel->flags;
u16 cap;
struct ieee80211_sta_ht_cap ht_cap;
BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
ieee80211_apply_htcap_overrides(sdata, &ht_cap);
/* determine capability flags */
cap = ht_cap.cap;
switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
cap &= ~IEEE80211_HT_CAP_SGI_40;
}
break;
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
cap &= ~IEEE80211_HT_CAP_SGI_40;
}
break;
}
/*
* If 40 MHz was disabled associate as though we weren't
* capable of 40 MHz -- some broken APs will never fall
* back to trying to transmit in 20 MHz.
*/
if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) {
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
cap &= ~IEEE80211_HT_CAP_SGI_40;
}
/* set SM PS mode properly */
cap &= ~IEEE80211_HT_CAP_SM_PS;
switch (smps) {
case IEEE80211_SMPS_AUTOMATIC:
case IEEE80211_SMPS_NUM_MODES:
WARN_ON(1);
fallthrough;
case IEEE80211_SMPS_OFF:
cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
IEEE80211_HT_CAP_SM_PS_SHIFT;
break;
case IEEE80211_SMPS_STATIC:
cap |= WLAN_HT_CAP_SM_PS_STATIC <<
IEEE80211_HT_CAP_SM_PS_SHIFT;
break;
case IEEE80211_SMPS_DYNAMIC:
cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
IEEE80211_HT_CAP_SM_PS_SHIFT;
break;
}
/* reserve and fill IE */
pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
}
/* This function determines vht capability flags for the association
* and builds the IE.
* Note - the function returns true to own the MU-MIMO capability
*/
static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb,
struct ieee80211_supported_band *sband,
struct ieee80211_vht_cap *ap_vht_cap,
ieee80211_conn_flags_t conn_flags)
{
struct ieee80211_local *local = sdata->local;
u8 *pos;
u32 cap;
struct ieee80211_sta_vht_cap vht_cap;
u32 mask, ap_bf_sts, our_bf_sts;
bool mu_mimo_owner = false;
BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
/* determine capability flags */
cap = vht_cap.cap;
if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) {
u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
}
if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) {
cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
}
/*
* Some APs apparently get confused if our capabilities are better
* than theirs, so restrict what we advertise in the assoc request.
*/
if (!(ap_vht_cap->vht_cap_info &
cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
else if (!(ap_vht_cap->vht_cap_info &
cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
/*
* If some other vif is using the MU-MIMO capability we cannot associate
* using MU-MIMO - this will lead to contradictions in the group-id
* mechanism.
* Ownership is defined since association request, in order to avoid
* simultaneous associations with MU-MIMO.
*/
if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
bool disable_mu_mimo = false;
struct ieee80211_sub_if_data *other;
list_for_each_entry_rcu(other, &local->interfaces, list) {
if (other->vif.bss_conf.mu_mimo_owner) {
disable_mu_mimo = true;
break;
}
}
if (disable_mu_mimo)
cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
else
mu_mimo_owner = true;
}
mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
our_bf_sts = cap & mask;
if (ap_bf_sts < our_bf_sts) {
cap &= ~mask;
cap |= ap_bf_sts;
}
/* reserve and fill IE */
pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
return mu_mimo_owner;
}
/* This function determines HE capability flags for the association
* and builds the IE.
*/
static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb,
struct ieee80211_supported_band *sband,
enum ieee80211_smps_mode smps_mode,
ieee80211_conn_flags_t conn_flags)
{
u8 *pos, *pre_he_pos;
const struct ieee80211_sta_he_cap *he_cap;
u8 he_cap_size;
he_cap = ieee80211_get_he_iftype_cap(sband,
ieee80211_vif_type_p2p(&sdata->vif));
if (WARN_ON(!he_cap))
return;
/* get a max size estimate */
he_cap_size =
2 + 1 + sizeof(he_cap->he_cap_elem) +
ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
ieee80211_he_ppe_size(he_cap->ppe_thres[0],
he_cap->he_cap_elem.phy_cap_info);
pos = skb_put(skb, he_cap_size);
pre_he_pos = pos;
pos = ieee80211_ie_build_he_cap(conn_flags,
pos, he_cap, pos + he_cap_size);
/* trim excess if any */
skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos));
ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb);
}
static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb,
struct ieee80211_supported_band *sband)
{
u8 *pos;
const struct ieee80211_sta_he_cap *he_cap;
const struct ieee80211_sta_eht_cap *eht_cap;
u8 eht_cap_size;
he_cap = ieee80211_get_he_iftype_cap(sband,
ieee80211_vif_type_p2p(&sdata->vif));
eht_cap = ieee80211_get_eht_iftype_cap(sband,
ieee80211_vif_type_p2p(&sdata->vif));
/*
* EHT capabilities element is only added if the HE capabilities element
* was added so assume that 'he_cap' is valid and don't check it.
*/
if (WARN_ON(!he_cap || !eht_cap))
return;
eht_cap_size =
2 + 1 + sizeof(eht_cap->eht_cap_elem) +
ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
&eht_cap->eht_cap_elem,
false) +
ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
eht_cap->eht_cap_elem.phy_cap_info);
pos = skb_put(skb, eht_cap_size);
ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size,
false);
}
static void ieee80211_assoc_add_rates(struct sk_buff *skb,
enum nl80211_chan_width width,
struct ieee80211_supported_band *sband,
struct ieee80211_mgd_assoc_data *assoc_data)
{
unsigned int shift = ieee80211_chanwidth_get_shift(width);
unsigned int rates_len, supp_rates_len;
u32 rates = 0;
int i, count;
u8 *pos;
if (assoc_data->supp_rates_len) {
/*
* Get all rates supported by the device and the AP as
* some APs don't like getting a superset of their rates
* in the association request (e.g. D-Link DAP 1353 in
* b-only mode)...
*/
rates_len = ieee80211_parse_bitrates(width, sband,
assoc_data->supp_rates,
assoc_data->supp_rates_len,
&rates);
} else {
/*
* In case AP not provide any supported rates information
* before association, we send information element(s) with
* all rates that we support.
*/
rates_len = sband->n_bitrates;
for (i = 0; i < sband->n_bitrates; i++)
rates |= BIT(i);
}
supp_rates_len = rates_len;
if (supp_rates_len > 8)
supp_rates_len = 8;
pos = skb_put(skb, supp_rates_len + 2);
*pos++ = WLAN_EID_SUPP_RATES;
*pos++ = supp_rates_len;
count = 0;
for (i = 0; i < sband->n_bitrates; i++) {
if (BIT(i) & rates) {
int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
5 * (1 << shift));
*pos++ = (u8)rate;
if (++count == 8)
break;
}
}
if (rates_len > count) {
pos = skb_put(skb, rates_len - count + 2);
*pos++ = WLAN_EID_EXT_SUPP_RATES;
*pos++ = rates_len - count;
for (i++; i < sband->n_bitrates; i++) {
if (BIT(i) & rates) {
int rate;
rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
5 * (1 << shift));
*pos++ = (u8)rate;
}
}
}
}
static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb,
const u8 *elems,
size_t elems_len,
size_t offset)
{
size_t noffset;
static const u8 before_ht[] = {
WLAN_EID_SSID,
WLAN_EID_SUPP_RATES,
WLAN_EID_EXT_SUPP_RATES,
WLAN_EID_PWR_CAPABILITY,
WLAN_EID_SUPPORTED_CHANNELS,
WLAN_EID_RSN,
WLAN_EID_QOS_CAPA,
WLAN_EID_RRM_ENABLED_CAPABILITIES,
WLAN_EID_MOBILITY_DOMAIN,
WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
WLAN_EID_RIC_DATA, /* reassoc only */
WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
};
static const u8 after_ric[] = {
WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
WLAN_EID_HT_CAPABILITY,
WLAN_EID_BSS_COEX_2040,
/* luckily this is almost always there */
WLAN_EID_EXT_CAPABILITY,
WLAN_EID_QOS_TRAFFIC_CAPA,
WLAN_EID_TIM_BCAST_REQ,
WLAN_EID_INTERWORKING,
/* 60 GHz (Multi-band, DMG, MMS) can't happen */
WLAN_EID_VHT_CAPABILITY,
WLAN_EID_OPMODE_NOTIF,
};
if (!elems_len)
return offset;
noffset = ieee80211_ie_split_ric(elems, elems_len,
before_ht,
ARRAY_SIZE(before_ht),
after_ric,
ARRAY_SIZE(after_ric),
offset);
skb_put_data(skb, elems + offset, noffset - offset);
return noffset;
}
static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb,
const u8 *elems,
size_t elems_len,
size_t offset)
{
static const u8 before_vht[] = {
/*
* no need to list the ones split off before HT
* or generated here
*/
WLAN_EID_BSS_COEX_2040,
WLAN_EID_EXT_CAPABILITY,
WLAN_EID_QOS_TRAFFIC_CAPA,
WLAN_EID_TIM_BCAST_REQ,
WLAN_EID_INTERWORKING,
/* 60 GHz (Multi-band, DMG, MMS) can't happen */
};
size_t noffset;
if (!elems_len)
return offset;
/* RIC already taken care of in ieee80211_add_before_ht_elems() */
noffset = ieee80211_ie_split(elems, elems_len,
before_vht, ARRAY_SIZE(before_vht),
offset);
skb_put_data(skb, elems + offset, noffset - offset);
return noffset;
}
static size_t ieee80211_add_before_he_elems(struct sk_buff *skb,
const u8 *elems,
size_t elems_len,
size_t offset)
{
static const u8 before_he[] = {
/*
* no need to list the ones split off before VHT
* or generated here
*/
WLAN_EID_OPMODE_NOTIF,
WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
/* 11ai elements */
WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
/* TODO: add 11ah/11aj/11ak elements */
};
size_t noffset;
if (!elems_len)
return offset;
/* RIC already taken care of in ieee80211_add_before_ht_elems() */
noffset = ieee80211_ie_split(elems, elems_len,
before_he, ARRAY_SIZE(before_he),
offset);
skb_put_data(skb, elems + offset, noffset - offset);
return noffset;
}
#define PRESENT_ELEMS_MAX 8
#define PRESENT_ELEM_EXT_OFFS 0x100
static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb, u16 capab,
const struct element *ext_capa,
const u16 *present_elems);
static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb, u16 *capab,
const struct element *ext_capa,
const u8 *extra_elems,
size_t extra_elems_len,
unsigned int link_id,
struct ieee80211_link_data *link,
u16 *present_elems)
{
enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
struct ieee80211_channel *chan = cbss->channel;
const struct ieee80211_sband_iftype_data *iftd;
struct ieee80211_local *local = sdata->local;
struct ieee80211_supported_band *sband;
enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20;
struct ieee80211_chanctx_conf *chanctx_conf;
enum ieee80211_smps_mode smps_mode;
u16 orig_capab = *capab;
size_t offset = 0;
int present_elems_len = 0;
u8 *pos;
int i;
#define ADD_PRESENT_ELEM(id) do { \
/* need a last for termination - we use 0 == SSID */ \
if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \
present_elems[present_elems_len++] = (id); \
} while (0)
#define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id))
if (link)
smps_mode = link->smps_mode;
else if (sdata->u.mgd.powersave)
smps_mode = IEEE80211_SMPS_DYNAMIC;
else
smps_mode = IEEE80211_SMPS_OFF;
if (link) {
/*
* 5/10 MHz scenarios are only viable without MLO, in which
* case this pointer should be used ... All of this is a bit
* unclear though, not sure this even works at all.
*/
rcu_read_lock();
chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
if (chanctx_conf)
width = chanctx_conf->def.width;
rcu_read_unlock();
}
sband = local->hw.wiphy->bands[chan->band];
iftd = ieee80211_get_sband_iftype_data(sband, iftype);
if (sband->band == NL80211_BAND_2GHZ) {
*capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
*capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
}
if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
*capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
if (sband->band != NL80211_BAND_S1GHZ)
ieee80211_assoc_add_rates(skb, width, sband, assoc_data);
if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
*capab & WLAN_CAPABILITY_RADIO_MEASURE) {
struct cfg80211_chan_def chandef = {
.width = width,
.chan = chan,
};
pos = skb_put(skb, 4);
*pos++ = WLAN_EID_PWR_CAPABILITY;
*pos++ = 2;
*pos++ = 0; /* min tx power */
/* max tx power */
*pos++ = ieee80211_chandef_max_power(&chandef);
ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY);
}
/*
* Per spec, we shouldn't include the list of channels if we advertise
* support for extended channel switching, but we've always done that;
* (for now?) apply this restriction only on the (new) 6 GHz band.
*/
if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
(sband->band != NL80211_BAND_6GHZ ||
!ext_capa || ext_capa->datalen < 1 ||
!(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
/* TODO: get this in reg domain format */
pos = skb_put(skb, 2 * sband->n_channels + 2);
*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
*pos++ = 2 * sband->n_channels;
for (i = 0; i < sband->n_channels; i++) {
int cf = sband->channels[i].center_freq;
*pos++ = ieee80211_frequency_to_channel(cf);
*pos++ = 1; /* one channel in the subband*/
}
ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS);
}
/* if present, add any custom IEs that go before HT */
offset = ieee80211_add_before_ht_elems(skb, extra_elems,
extra_elems_len,
offset);
if (sband->band != NL80211_BAND_6GHZ &&
!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) {
ieee80211_add_ht_ie(sdata, skb,
assoc_data->link[link_id].ap_ht_param,
sband, chan, smps_mode,
assoc_data->link[link_id].conn_flags);
ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY);
}
/* if present, add any custom IEs that go before VHT */
offset = ieee80211_add_before_vht_elems(skb, extra_elems,
extra_elems_len,
offset);
if (sband->band != NL80211_BAND_6GHZ &&
!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
bool mu_mimo_owner =
ieee80211_add_vht_ie(sdata, skb, sband,
&assoc_data->link[link_id].ap_vht_cap,
assoc_data->link[link_id].conn_flags);
if (link)
link->conf->mu_mimo_owner = mu_mimo_owner;
ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY);
}
/*
* If AP doesn't support HT, mark HE and EHT as disabled.
* If on the 5GHz band, make sure it supports VHT.
*/
if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT ||
(sband->band == NL80211_BAND_5GHZ &&
assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT))
assoc_data->link[link_id].conn_flags |=
IEEE80211_CONN_DISABLE_HE |
IEEE80211_CONN_DISABLE_EHT;
/* if present, add any custom IEs that go before HE */
offset = ieee80211_add_before_he_elems(skb, extra_elems,
extra_elems_len,
offset);
if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) {
ieee80211_add_he_ie(sdata, skb, sband, smps_mode,
assoc_data->link[link_id].conn_flags);
ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY);
}
/*
* careful - need to know about all the present elems before
* calling ieee80211_assoc_add_ml_elem(), so add this one if
* we're going to put it after the ML element
*/
if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT))
ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY);
if (link_id == assoc_data->assoc_link_id)
ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa,
present_elems);
/* crash if somebody gets it wrong */
present_elems = NULL;
if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT))
ieee80211_add_eht_ie(sdata, skb, sband);
if (sband->band == NL80211_BAND_S1GHZ) {
ieee80211_add_aid_request_ie(sdata, skb);
ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb);
}
if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len)
skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len);
if (link)
link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags;
return offset;
}
static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb,
const u16 *outer,
const u16 *inner)
{
unsigned int skb_len = skb->len;
bool at_extension = false;
bool added = false;
int i, j;
u8 *len, *list_len = NULL;
skb_put_u8(skb, WLAN_EID_EXTENSION);
len = skb_put(skb, 1);
skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE);
for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) {
u16 elem = outer[i];
bool have_inner = false;
/* should at least be sorted in the sense of normal -> ext */
WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS);
/* switch to extension list */
if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) {
at_extension = true;
if (!list_len)
skb_put_u8(skb, 0);
list_len = NULL;
}
for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) {
if (elem == inner[j]) {
have_inner = true;
break;
}
}
if (have_inner)
continue;
if (!list_len) {
list_len = skb_put(skb, 1);
*list_len = 0;
}
*list_len += 1;
skb_put_u8(skb, (u8)elem);
added = true;
}
/* if we added a list but no extension list, make a zero-len one */
if (added && (!at_extension || !list_len))
skb_put_u8(skb, 0);
/* if nothing added remove extension element completely */
if (!added)
skb_trim(skb, skb_len);
else
*len = skb->len - skb_len - 2;
}
static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb, u16 capab,
const struct element *ext_capa,
const u16 *outer_present_elems)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
struct ieee80211_multi_link_elem *ml_elem;
struct ieee80211_mle_basic_common_info *common;
const struct wiphy_iftype_ext_capab *ift_ext_capa;
__le16 eml_capa = 0, mld_capa_ops = 0;
unsigned int link_id;
u8 *ml_elem_len;
void *capab_pos;
if (!sdata->vif.valid_links)
return;
ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy,
ieee80211_vif_type_p2p(&sdata->vif));
if (ift_ext_capa) {
eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities);
mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops);
}
skb_put_u8(skb, WLAN_EID_EXTENSION);
ml_elem_len = skb_put(skb, 1);
skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK);
ml_elem = skb_put(skb, sizeof(*ml_elem));
ml_elem->control =
cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC |
IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP);
common = skb_put(skb, sizeof(*common));
common->len = sizeof(*common) +
2; /* MLD capa/ops */
memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN);
/* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */
if (eml_capa &
cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP |
IEEE80211_EML_CAP_EMLMR_SUPPORT))) {
common->len += 2; /* EML capabilities */
ml_elem->control |=
cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA);
skb_put_data(skb, &eml_capa, sizeof(eml_capa));
}
/* need indication from userspace to support this */
mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP);
skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops));
for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
u16 link_present_elems[PRESENT_ELEMS_MAX] = {};
const u8 *extra_elems;
size_t extra_elems_len;
size_t extra_used;
u8 *subelem_len = NULL;
__le16 ctrl;
if (!assoc_data->link[link_id].bss ||
link_id == assoc_data->assoc_link_id)
continue;
extra_elems = assoc_data->link[link_id].elems;
extra_elems_len = assoc_data->link[link_id].elems_len;
skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE);
subelem_len = skb_put(skb, 1);
ctrl = cpu_to_le16(link_id |
IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE |
IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT);
skb_put_data(skb, &ctrl, sizeof(ctrl));
skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */
skb_put_data(skb, assoc_data->link[link_id].addr,
ETH_ALEN);
/*
* Now add the contents of the (re)association request,
* but the "listen interval" and "current AP address"
* (if applicable) are skipped. So we only have
* the capability field (remember the position and fill
* later), followed by the elements added below by
* calling ieee80211_assoc_link_elems().
*/
capab_pos = skb_put(skb, 2);
extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab,
ext_capa,
extra_elems,
extra_elems_len,
link_id, NULL,
link_present_elems);
if (extra_elems)
skb_put_data(skb, extra_elems + extra_used,
extra_elems_len - extra_used);
put_unaligned_le16(capab, capab_pos);
ieee80211_add_non_inheritance_elem(skb, outer_present_elems,
link_present_elems);
ieee80211_fragment_element(skb, subelem_len);
}
ieee80211_fragment_element(skb, ml_elem_len);
}
static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
struct ieee80211_link_data *link;
struct sk_buff *skb;
struct ieee80211_mgmt *mgmt;
u8 *pos, qos_info, *ie_start;
size_t offset, noffset;
u16 capab = WLAN_CAPABILITY_ESS, link_capab;
__le16 listen_int;
struct element *ext_capa = NULL;
enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
struct ieee80211_prep_tx_info info = {};
unsigned int link_id, n_links = 0;
u16 present_elems[PRESENT_ELEMS_MAX] = {};
void *capab_pos;
size_t size;
int ret;
/* we know it's writable, cast away the const */
if (assoc_data->ie_len)
ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
assoc_data->ie,
assoc_data->ie_len);
sdata_assert_lock(sdata);
size = local->hw.extra_tx_headroom +
sizeof(*mgmt) + /* bit too much but doesn't matter */
2 + assoc_data->ssid_len + /* SSID */
assoc_data->ie_len + /* extra IEs */
(assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
9; /* WMM */
for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
const struct ieee80211_sband_iftype_data *iftd;
struct ieee80211_supported_band *sband;
if (!cbss)
continue;
sband = local->hw.wiphy->bands[cbss->channel->band];
n_links++;
/* add STA profile elements length */
size += assoc_data->link[link_id].elems_len;
/* and supported rates length */
size += 4 + sband->n_bitrates;
/* supported channels */
size += 2 + 2 * sband->n_channels;
iftd = ieee80211_get_sband_iftype_data(sband, iftype);
if (iftd)
size += iftd->vendor_elems.len;
/* power capability */
size += 4;
/* HT, VHT, HE, EHT */
size += 2 + sizeof(struct ieee80211_ht_cap);
size += 2 + sizeof(struct ieee80211_vht_cap);
size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
sizeof(struct ieee80211_he_mcs_nss_supp) +
IEEE80211_HE_PPE_THRES_MAX_LEN;
if (sband->band == NL80211_BAND_6GHZ)
size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa);
size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
sizeof(struct ieee80211_eht_mcs_nss_supp) +
IEEE80211_EHT_PPE_THRES_MAX_LEN;
/* non-inheritance element */
size += 2 + 2 + PRESENT_ELEMS_MAX;
/* should be the same across all BSSes */
if (cbss->capability & WLAN_CAPABILITY_PRIVACY)
capab |= WLAN_CAPABILITY_PRIVACY;
}
if (sdata->vif.valid_links) {
/* consider the multi-link element with STA profile */
size += sizeof(struct ieee80211_multi_link_elem);
/* max common info field in basic multi-link element */
size += sizeof(struct ieee80211_mle_basic_common_info) +
2 + /* capa & op */
2; /* EML capa */
/*
* The capability elements were already considered above;
* note this over-estimates a bit because there's no
* STA profile for the assoc link.
*/
size += (n_links - 1) *
(1 + 1 + /* subelement ID/length */
2 + /* STA control */
1 + ETH_ALEN + 2 /* STA Info field */);
}
link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata);
if (WARN_ON(!link))
return -EINVAL;
if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss))
return -EINVAL;
skb = alloc_skb(size, GFP_KERNEL);
if (!skb)
return -ENOMEM;
skb_reserve(skb, local->hw.extra_tx_headroom);
if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
capab |= WLAN_CAPABILITY_RADIO_MEASURE;
/* Set MBSSID support for HE AP if needed */
if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
ext_capa && ext_capa->datalen >= 3)
ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
mgmt = skb_put_zero(skb, 24);
memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
listen_int = cpu_to_le16(assoc_data->s1g ?
ieee80211_encode_usf(local->hw.conf.listen_interval) :
local->hw.conf.listen_interval);
if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) {
skb_put(skb, 10);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_REASSOC_REQ);
capab_pos = &mgmt->u.reassoc_req.capab_info;
mgmt->u.reassoc_req.listen_interval = listen_int;
memcpy(mgmt->u.reassoc_req.current_ap,
assoc_data->prev_ap_addr, ETH_ALEN);
info.subtype = IEEE80211_STYPE_REASSOC_REQ;
} else {
skb_put(skb, 4);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_ASSOC_REQ);
capab_pos = &mgmt->u.assoc_req.capab_info;
mgmt->u.assoc_req.listen_interval = listen_int;
info.subtype = IEEE80211_STYPE_ASSOC_REQ;
}
/* SSID */
pos = skb_put(skb, 2 + assoc_data->ssid_len);
ie_start = pos;
*pos++ = WLAN_EID_SSID;
*pos++ = assoc_data->ssid_len;
memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
/* add the elements for the assoc (main) link */
link_capab = capab;
offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab,
ext_capa,
assoc_data->ie,
assoc_data->ie_len,
assoc_data->assoc_link_id, link,
present_elems);
put_unaligned_le16(link_capab, capab_pos);
/* if present, add any custom non-vendor IEs */
if (assoc_data->ie_len) {
noffset = ieee80211_ie_split_vendor(assoc_data->ie,
assoc_data->ie_len,
offset);
skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
offset = noffset;
}
if (assoc_data->wmm) {
if (assoc_data->uapsd) {
qos_info = ifmgd->uapsd_queues;
qos_info |= (ifmgd->uapsd_max_sp_len <<
IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
} else {
qos_info = 0;
}
pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
}
/* add any remaining custom (i.e. vendor specific here) IEs */
if (assoc_data->ie_len) {
noffset = assoc_data->ie_len;
skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
}
if (assoc_data->fils_kek_len) {
ret = fils_encrypt_assoc_req(skb, assoc_data);
if (ret < 0) {
dev_kfree_skb(skb);
return ret;
}
}
pos = skb_tail_pointer(skb);
kfree(ifmgd->assoc_req_ies);
ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
if (!ifmgd->assoc_req_ies) {
dev_kfree_skb(skb);
return -ENOMEM;
}
ifmgd->assoc_req_ies_len = pos - ie_start;
drv_mgd_prepare_tx(local, sdata, &info);
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
IEEE80211_TX_INTFL_MLME_CONN_TX;
ieee80211_tx_skb(sdata, skb);
return 0;
}
void ieee80211_send_pspoll(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_pspoll *pspoll;
struct sk_buff *skb;
skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
if (!skb)
return;
pspoll = (struct ieee80211_pspoll *) skb->data;
pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
ieee80211_tx_skb(sdata, skb);
}
void ieee80211_send_nullfunc(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
bool powersave)
{
struct sk_buff *skb;
struct ieee80211_hdr_3addr *nullfunc;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1,
!ieee80211_hw_check(&local->hw,
DOESNT_SUPPORT_QOS_NDP));
if (!skb)
return;
nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
if (powersave)
nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
ieee80211_tx_skb(sdata, skb);
}
void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata)
{
struct sk_buff *skb;
struct ieee80211_hdr *nullfunc;
__le16 fc;
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
return;
skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
if (!skb)
return;
skb_reserve(skb, local->hw.extra_tx_headroom);
nullfunc = skb_put_zero(skb, 30);
fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
nullfunc->frame_control = fc;
memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN);
memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
ieee80211_tx_skb(sdata, skb);
}
/* spectrum management related things */
static void ieee80211_chswitch_work(struct work_struct *work)
{
struct ieee80211_link_data *link =
container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work);
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
int ret;
if (!ieee80211_sdata_running(sdata))
return;
sdata_lock(sdata);
mutex_lock(&local->mtx);
mutex_lock(&local->chanctx_mtx);
if (!ifmgd->associated)
goto out;
if (!link->conf->csa_active)
goto out;
/*
* using reservation isn't immediate as it may be deferred until later
* with multi-vif. once reservation is complete it will re-schedule the
* work with no reserved_chanctx so verify chandef to check if it
* completed successfully
*/
if (link->reserved_chanctx) {
/*
* with multi-vif csa driver may call ieee80211_csa_finish()
* many times while waiting for other interfaces to use their
* reservations
*/
if (link->reserved_ready)
goto out;
ret = ieee80211_link_use_reserved_context(link);
if (ret) {
sdata_info(sdata,
"failed to use reserved channel context, disconnecting (err=%d)\n",
ret);
ieee80211_queue_work(&sdata->local->hw,
&ifmgd->csa_connection_drop_work);
goto out;
}
goto out;
}
if (!cfg80211_chandef_identical(&link->conf->chandef,
&link->csa_chandef)) {
sdata_info(sdata,
"failed to finalize channel switch, disconnecting\n");
ieee80211_queue_work(&sdata->local->hw,
&ifmgd->csa_connection_drop_work);
goto out;
}
link->u.mgd.csa_waiting_bcn = true;
ieee80211_sta_reset_beacon_monitor(sdata);
ieee80211_sta_reset_conn_monitor(sdata);
out:
mutex_unlock(&local->chanctx_mtx);
mutex_unlock(&local->mtx);
sdata_unlock(sdata);
}
static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
int ret;
sdata_assert_lock(sdata);
WARN_ON(!link->conf->csa_active);
if (link->csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
link->csa_block_tx = false;
}
link->conf->csa_active = false;
link->u.mgd.csa_waiting_bcn = false;
/*
* If the CSA IE is still present on the beacon after the switch,
* we need to consider it as a new CSA (possibly to self).
*/
link->u.mgd.beacon_crc_valid = false;
ret = drv_post_channel_switch(sdata);
if (ret) {
sdata_info(sdata,
"driver post channel switch failed, disconnecting\n");
ieee80211_queue_work(&local->hw,
&ifmgd->csa_connection_drop_work);
return;
}
cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0);
}
void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
if (WARN_ON(sdata->vif.valid_links))
success = false;
trace_api_chswitch_done(sdata, success);
if (!success) {
sdata_info(sdata,
"driver channel switch failed, disconnecting\n");
ieee80211_queue_work(&sdata->local->hw,
&ifmgd->csa_connection_drop_work);
} else {
ieee80211_queue_work(&sdata->local->hw,
&sdata->deflink.u.mgd.chswitch_work);
}
}
EXPORT_SYMBOL(ieee80211_chswitch_done);
static void ieee80211_chswitch_timer(struct timer_list *t)
{
struct ieee80211_link_data *link =
from_timer(link, t, u.mgd.chswitch_timer);
ieee80211_queue_work(&link->sdata->local->hw,
&link->u.mgd.chswitch_work);
}
static void
ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
if (!local->ops->abort_channel_switch)
return;
mutex_lock(&local->mtx);
mutex_lock(&local->chanctx_mtx);
ieee80211_link_unreserve_chanctx(link);
mutex_unlock(&local->chanctx_mtx);
if (link->csa_block_tx)
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
link->csa_block_tx = false;
link->conf->csa_active = false;
mutex_unlock(&local->mtx);
drv_abort_channel_switch(sdata);
}
static void
ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
u64 timestamp, u32 device_timestamp,
struct ieee802_11_elems *elems,
bool beacon)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct cfg80211_bss *cbss = link->u.mgd.bss;
struct ieee80211_chanctx_conf *conf;
struct ieee80211_chanctx *chanctx;
enum nl80211_band current_band;
struct ieee80211_csa_ie csa_ie;
struct ieee80211_channel_switch ch_switch;
struct ieee80211_bss *bss;
int res;
sdata_assert_lock(sdata);
if (!cbss)
return;
if (local->scanning)
return;
current_band = cbss->channel->band;
bss = (void *)cbss->priv;
res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
bss->vht_cap_info,
link->u.mgd.conn_flags,
link->u.mgd.bssid, &csa_ie);
if (!res) {
ch_switch.timestamp = timestamp;
ch_switch.device_timestamp = device_timestamp;
ch_switch.block_tx = csa_ie.mode;
ch_switch.chandef = csa_ie.chandef;
ch_switch.count = csa_ie.count;
ch_switch.delay = csa_ie.max_switch_time;
}
if (res < 0)
goto lock_and_drop_connection;
if (beacon && link->conf->csa_active &&
!link->u.mgd.csa_waiting_bcn) {
if (res)
ieee80211_sta_abort_chanswitch(link);
else
drv_channel_switch_rx_beacon(sdata, &ch_switch);
return;
} else if (link->conf->csa_active || res) {
/* disregard subsequent announcements if already processing */
return;
}
if (link->conf->chandef.chan->band !=
csa_ie.chandef.chan->band) {
sdata_info(sdata,
"AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
link->u.mgd.bssid,
csa_ie.chandef.chan->center_freq,
csa_ie.chandef.width, csa_ie.chandef.center_freq1,
csa_ie.chandef.center_freq2);
goto lock_and_drop_connection;
}
if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
IEEE80211_CHAN_DISABLED)) {
sdata_info(sdata,
"AP %pM switches to unsupported channel "
"(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
"disconnecting\n",
link->u.mgd.bssid,
csa_ie.chandef.chan->center_freq,
csa_ie.chandef.chan->freq_offset,
csa_ie.chandef.width, csa_ie.chandef.center_freq1,
csa_ie.chandef.freq1_offset,
csa_ie.chandef.center_freq2);
goto lock_and_drop_connection;
}
if (cfg80211_chandef_identical(&csa_ie.chandef,
&link->conf->chandef) &&
(!csa_ie.mode || !beacon)) {
if (link->u.mgd.csa_ignored_same_chan)
return;
sdata_info(sdata,
"AP %pM tries to chanswitch to same channel, ignore\n",
link->u.mgd.bssid);
link->u.mgd.csa_ignored_same_chan = true;
return;
}
/*
* Drop all TDLS peers - either we disconnect or move to a different
* channel from this point on. There's no telling what our peer will do.
* The TDLS WIDER_BW scenario is also problematic, as peers might now
* have an incompatible wider chandef.
*/
ieee80211_teardown_tdls_peers(sdata);
mutex_lock(&local->mtx);
mutex_lock(&local->chanctx_mtx);
conf = rcu_dereference_protected(link->conf->chanctx_conf,
lockdep_is_held(&local->chanctx_mtx));
if (!conf) {
sdata_info(sdata,
"no channel context assigned to vif?, disconnecting\n");
goto drop_connection;
}
chanctx = container_of(conf, struct ieee80211_chanctx, conf);
if (local->use_chanctx &&
!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
sdata_info(sdata,
"driver doesn't support chan-switch with channel contexts\n");
goto drop_connection;
}
if (drv_pre_channel_switch(sdata, &ch_switch)) {
sdata_info(sdata,
"preparing for channel switch failed, disconnecting\n");
goto drop_connection;
}
res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef,
chanctx->mode, false);
if (res) {
sdata_info(sdata,
"failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
res);
goto drop_connection;
}
mutex_unlock(&local->chanctx_mtx);
link->conf->csa_active = true;
link->csa_chandef = csa_ie.chandef;
link->csa_block_tx = csa_ie.mode;
link->u.mgd.csa_ignored_same_chan = false;
link->u.mgd.beacon_crc_valid = false;
if (link->csa_block_tx)
ieee80211_stop_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
mutex_unlock(&local->mtx);
cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0,
csa_ie.count, csa_ie.mode);
if (local->ops->channel_switch) {
/* use driver's channel switch callback */
drv_channel_switch(local, sdata, &ch_switch);
return;
}
/* channel switch handled in software */
if (csa_ie.count <= 1)
ieee80211_queue_work(&local->hw, &link->u.mgd.chswitch_work);
else
mod_timer(&link->u.mgd.chswitch_timer,
TU_TO_EXP_TIME((csa_ie.count - 1) *
cbss->beacon_interval));
return;
lock_and_drop_connection:
mutex_lock(&local->mtx);
mutex_lock(&local->chanctx_mtx);
drop_connection:
/*
* This is just so that the disconnect flow will know that
* we were trying to switch channel and failed. In case the
* mode is 1 (we are not allowed to Tx), we will know not to
* send a deauthentication frame. Those two fields will be
* reset when the disconnection worker runs.
*/
link->conf->csa_active = true;
link->csa_block_tx = csa_ie.mode;
ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
mutex_unlock(&local->chanctx_mtx);
mutex_unlock(&local->mtx);
}
static bool
ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
struct ieee80211_channel *channel,
const u8 *country_ie, u8 country_ie_len,
const u8 *pwr_constr_elem,
int *chan_pwr, int *pwr_reduction)
{
struct ieee80211_country_ie_triplet *triplet;
int chan = ieee80211_frequency_to_channel(channel->center_freq);
int i, chan_increment;
bool have_chan_pwr = false;
/* Invalid IE */
if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
return false;
triplet = (void *)(country_ie + 3);
country_ie_len -= 3;
switch (channel->band) {
default:
WARN_ON_ONCE(1);
fallthrough;
case NL80211_BAND_2GHZ:
case NL80211_BAND_60GHZ:
case NL80211_BAND_LC:
chan_increment = 1;
break;
case NL80211_BAND_5GHZ:
chan_increment = 4;
break;
case NL80211_BAND_6GHZ:
/*
* In the 6 GHz band, the "maximum transmit power level"
* field in the triplets is reserved, and thus will be
* zero and we shouldn't use it to control TX power.
* The actual TX power will be given in the transmit
* power envelope element instead.
*/
return false;
}
/* find channel */
while (country_ie_len >= 3) {
u8 first_channel = triplet->chans.first_channel;
if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
goto next;
for (i = 0; i < triplet->chans.num_channels; i++) {
if (first_channel + i * chan_increment == chan) {
have_chan_pwr = true;
*chan_pwr = triplet->chans.max_power;
break;
}
}
if (have_chan_pwr)
break;
next:
triplet++;
country_ie_len -= 3;
}
if (have_chan_pwr && pwr_constr_elem)
*pwr_reduction = *pwr_constr_elem;
else
*pwr_reduction = 0;
return have_chan_pwr;
}
static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
struct ieee80211_channel *channel,
const u8 *cisco_dtpc_ie,
int *pwr_level)
{
/* From practical testing, the first data byte of the DTPC element
* seems to contain the requested dBm level, and the CLI on Cisco
* APs clearly state the range is -127 to 127 dBm, which indicates
* a signed byte, although it seemingly never actually goes negative.
* The other byte seems to always be zero.
*/
*pwr_level = (__s8)cisco_dtpc_ie[4];
}
static u32 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link,
struct ieee80211_channel *channel,
struct ieee80211_mgmt *mgmt,
const u8 *country_ie, u8 country_ie_len,
const u8 *pwr_constr_ie,
const u8 *cisco_dtpc_ie)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
bool has_80211h_pwr = false, has_cisco_pwr = false;
int chan_pwr = 0, pwr_reduction_80211h = 0;
int pwr_level_cisco, pwr_level_80211h;
int new_ap_level;
__le16 capab = mgmt->u.probe_resp.capab_info;
if (ieee80211_is_s1g_beacon(mgmt->frame_control))
return 0; /* TODO */
if (country_ie &&
(capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
sdata, channel, country_ie, country_ie_len,
pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
pwr_level_80211h =
max_t(int, 0, chan_pwr - pwr_reduction_80211h);
}
if (cisco_dtpc_ie) {
ieee80211_find_cisco_dtpc(
sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
has_cisco_pwr = true;
}
if (!has_80211h_pwr && !has_cisco_pwr)
return 0;
/* If we have both 802.11h and Cisco DTPC, apply both limits
* by picking the smallest of the two power levels advertised.
*/
if (has_80211h_pwr &&
(!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
new_ap_level = pwr_level_80211h;
if (link->ap_power_level == new_ap_level)
return 0;
sdata_dbg(sdata,
"Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
link->u.mgd.bssid);
} else { /* has_cisco_pwr is always true here. */
new_ap_level = pwr_level_cisco;
if (link->ap_power_level == new_ap_level)
return 0;
sdata_dbg(sdata,
"Limiting TX power to %d dBm as advertised by %pM\n",
pwr_level_cisco, link->u.mgd.bssid);
}
link->ap_power_level = new_ap_level;
if (__ieee80211_recalc_txpower(sdata))
return BSS_CHANGED_TXPOWER;
return 0;
}
/* powersave */
static void ieee80211_enable_ps(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_conf *conf = &local->hw.conf;
/*
* If we are scanning right now then the parameters will
* take effect when scan finishes.
*/
if (local->scanning)
return;
if (conf->dynamic_ps_timeout > 0 &&
!ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
mod_timer(&local->dynamic_ps_timer, jiffies +
msecs_to_jiffies(conf->dynamic_ps_timeout));
} else {
if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
ieee80211_send_nullfunc(local, sdata, true);
if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
return;
conf->flags |= IEEE80211_CONF_PS;
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
}
}
static void ieee80211_change_ps(struct ieee80211_local *local)
{
struct ieee80211_conf *conf = &local->hw.conf;
if (local->ps_sdata) {
ieee80211_enable_ps(local, local->ps_sdata);
} else if (conf->flags & IEEE80211_CONF_PS) {
conf->flags &= ~IEEE80211_CONF_PS;
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
del_timer_sync(&local->dynamic_ps_timer);
cancel_work_sync(&local->dynamic_ps_enable_work);
}
}
static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *mgd = &sdata->u.mgd;
struct sta_info *sta = NULL;
bool authorized = false;
if (!mgd->powersave)
return false;
if (mgd->broken_ap)
return false;
if (!mgd->associated)
return false;
if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
return false;
if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) &&
!sdata->deflink.u.mgd.have_beacon)
return false;
rcu_read_lock();
sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
if (sta)
authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
rcu_read_unlock();
return authorized;
}
/* need to hold RTNL or interface lock */
void ieee80211_recalc_ps(struct ieee80211_local *local)
{
struct ieee80211_sub_if_data *sdata, *found = NULL;
int count = 0;
int timeout;
if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) ||
ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
local->ps_sdata = NULL;
return;
}
list_for_each_entry(sdata, &local->interfaces, list) {
if (!ieee80211_sdata_running(sdata))
continue;
if (sdata->vif.type == NL80211_IFTYPE_AP) {
/* If an AP vif is found, then disable PS
* by setting the count to zero thereby setting
* ps_sdata to NULL.
*/
count = 0;
break;
}
if (sdata->vif.type != NL80211_IFTYPE_STATION)
continue;
found = sdata;
count++;
}
if (count == 1 && ieee80211_powersave_allowed(found)) {
u8 dtimper = found->deflink.u.mgd.dtim_period;
timeout = local->dynamic_ps_forced_timeout;
if (timeout < 0)
timeout = 100;
local->hw.conf.dynamic_ps_timeout = timeout;
/* If the TIM IE is invalid, pretend the value is 1 */
if (!dtimper)
dtimper = 1;
local->hw.conf.ps_dtim_period = dtimper;
local->ps_sdata = found;
} else {
local->ps_sdata = NULL;
}
ieee80211_change_ps(local);
}
void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
{
bool ps_allowed = ieee80211_powersave_allowed(sdata);
if (sdata->vif.cfg.ps != ps_allowed) {
sdata->vif.cfg.ps = ps_allowed;
ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS);
}
}
void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
{
struct ieee80211_local *local =
container_of(work, struct ieee80211_local,
dynamic_ps_disable_work);
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
}
ieee80211_wake_queues_by_reason(&local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_PS,
false);
}
void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
{
struct ieee80211_local *local =
container_of(work, struct ieee80211_local,
dynamic_ps_enable_work);
struct ieee80211_sub_if_data *sdata = local->ps_sdata;
struct ieee80211_if_managed *ifmgd;
unsigned long flags;
int q;
/* can only happen when PS was just disabled anyway */
if (!sdata)
return;
ifmgd = &sdata->u.mgd;
if (local->hw.conf.flags & IEEE80211_CONF_PS)
return;
if (local->hw.conf.dynamic_ps_timeout > 0) {
/* don't enter PS if TX frames are pending */
if (drv_tx_frames_pending(local)) {
mod_timer(&local->dynamic_ps_timer, jiffies +
msecs_to_jiffies(
local->hw.conf.dynamic_ps_timeout));
return;
}
/*
* transmission can be stopped by others which leads to
* dynamic_ps_timer expiry. Postpone the ps timer if it
* is not the actual idle state.
*/
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
for (q = 0; q < local->hw.queues; q++) {
if (local->queue_stop_reasons[q]) {
spin_unlock_irqrestore(&local->queue_stop_reason_lock,
flags);
mod_timer(&local->dynamic_ps_timer, jiffies +
msecs_to_jiffies(
local->hw.conf.dynamic_ps_timeout));
return;
}
}
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}
if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
if (drv_tx_frames_pending(local)) {
mod_timer(&local->dynamic_ps_timer, jiffies +
msecs_to_jiffies(
local->hw.conf.dynamic_ps_timeout));
} else {
ieee80211_send_nullfunc(local, sdata, true);
/* Flush to get the tx status of nullfunc frame */
ieee80211_flush_queues(local, sdata, false);
}
}
if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
local->hw.conf.flags |= IEEE80211_CONF_PS;
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
}
}
void ieee80211_dynamic_ps_timer(struct timer_list *t)
{
struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
}
void ieee80211_dfs_cac_timer_work(struct work_struct *work)
{
struct delayed_work *delayed_work = to_delayed_work(work);
struct ieee80211_link_data *link =
container_of(delayed_work, struct ieee80211_link_data,
dfs_cac_timer_work);
struct cfg80211_chan_def chandef = link->conf->chandef;
struct ieee80211_sub_if_data *sdata = link->sdata;
mutex_lock(&sdata->local->mtx);
if (sdata->wdev.cac_started) {
ieee80211_link_release_channel(link);
cfg80211_cac_event(sdata->dev, &chandef,
NL80211_RADAR_CAC_FINISHED,
GFP_KERNEL);
}
mutex_unlock(&sdata->local->mtx);
}
static bool
__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
bool ret = false;
int ac;
if (local->hw.queues < IEEE80211_NUM_ACS)
return false;
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
int non_acm_ac;
unsigned long now = jiffies;
if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
tx_tspec->admitted_time &&
time_after(now, tx_tspec->time_slice_start + HZ)) {
tx_tspec->consumed_tx_time = 0;
tx_tspec->time_slice_start = now;
if (tx_tspec->downgraded)
tx_tspec->action =
TX_TSPEC_ACTION_STOP_DOWNGRADE;
}
switch (tx_tspec->action) {
case TX_TSPEC_ACTION_STOP_DOWNGRADE:
/* take the original parameters */
if (drv_conf_tx(local, &sdata->deflink, ac,
&sdata->deflink.tx_conf[ac]))
link_err(&sdata->deflink,
"failed to set TX queue parameters for queue %d\n",
ac);
tx_tspec->action = TX_TSPEC_ACTION_NONE;
tx_tspec->downgraded = false;
ret = true;
break;
case TX_TSPEC_ACTION_DOWNGRADE:
if (time_after(now, tx_tspec->time_slice_start + HZ)) {
tx_tspec->action = TX_TSPEC_ACTION_NONE;
ret = true;
break;
}
/* downgrade next lower non-ACM AC */
for (non_acm_ac = ac + 1;
non_acm_ac < IEEE80211_NUM_ACS;
non_acm_ac++)
if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
break;
/* Usually the loop will result in using BK even if it
* requires admission control, but such a configuration
* makes no sense and we have to transmit somehow - the
* AC selection does the same thing.
* If we started out trying to downgrade from BK, then
* the extra condition here might be needed.
*/
if (non_acm_ac >= IEEE80211_NUM_ACS)
non_acm_ac = IEEE80211_AC_BK;
if (drv_conf_tx(local, &sdata->deflink, ac,
&sdata->deflink.tx_conf[non_acm_ac]))
link_err(&sdata->deflink,
"failed to set TX queue parameters for queue %d\n",
ac);
tx_tspec->action = TX_TSPEC_ACTION_NONE;
ret = true;
schedule_delayed_work(&ifmgd->tx_tspec_wk,
tx_tspec->time_slice_start + HZ - now + 1);
break;
case TX_TSPEC_ACTION_NONE:
/* nothing now */
break;
}
}
return ret;
}
void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
{
if (__ieee80211_sta_handle_tspec_ac_params(sdata))
ieee80211_link_info_change_notify(sdata, &sdata->deflink,
BSS_CHANGED_QOS);
}
static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
{
struct ieee80211_sub_if_data *sdata;
sdata = container_of(work, struct ieee80211_sub_if_data,
u.mgd.tx_tspec_wk.work);
ieee80211_sta_handle_tspec_ac_params(sdata);
}
void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_tx_queue_params *params = link->tx_conf;
u8 ac;
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
mlme_dbg(sdata,
"WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
ac, params[ac].acm,
params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
params[ac].txop, params[ac].uapsd,
ifmgd->tx_tspec[ac].downgraded);
if (!ifmgd->tx_tspec[ac].downgraded &&
drv_conf_tx(local, link, ac, &params[ac]))
link_err(link,
"failed to set TX queue parameters for AC %d\n",
ac);
}
}
/* MLME */
static bool
ieee80211_sta_wmm_params(struct ieee80211_local *local,
struct ieee80211_link_data *link,
const u8 *wmm_param, size_t wmm_param_len,
const struct ieee80211_mu_edca_param_set *mu_edca)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
size_t left;
int count, mu_edca_count, ac;
const u8 *pos;
u8 uapsd_queues = 0;
if (!local->ops->conf_tx)
return false;
if (local->hw.queues < IEEE80211_NUM_ACS)
return false;
if (!wmm_param)
return false;
if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
return false;
if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
uapsd_queues = ifmgd->uapsd_queues;
count = wmm_param[6] & 0x0f;
/* -1 is the initial value of ifmgd->mu_edca_last_param_set.
* if mu_edca was preset before and now it disappeared tell
* the driver about it.
*/
mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
if (count == link->u.mgd.wmm_last_param_set &&
mu_edca_count == link->u.mgd.mu_edca_last_param_set)
return false;
link->u.mgd.wmm_last_param_set = count;
link->u.mgd.mu_edca_last_param_set = mu_edca_count;
pos = wmm_param + 8;
left = wmm_param_len - 8;
memset(&params, 0, sizeof(params));
sdata->wmm_acm = 0;
for (; left >= 4; left -= 4, pos += 4) {
int aci = (pos[0] >> 5) & 0x03;
int acm = (pos[0] >> 4) & 0x01;
bool uapsd = false;
switch (aci) {
case 1: /* AC_BK */
ac = IEEE80211_AC_BK;
if (acm)
sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
uapsd = true;
params[ac].mu_edca = !!mu_edca;
if (mu_edca)
params[ac].mu_edca_param_rec = mu_edca->ac_bk;
break;
case 2: /* AC_VI */
ac = IEEE80211_AC_VI;
if (acm)
sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
uapsd = true;
params[ac].mu_edca = !!mu_edca;
if (mu_edca)
params[ac].mu_edca_param_rec = mu_edca->ac_vi;
break;
case 3: /* AC_VO */
ac = IEEE80211_AC_VO;
if (acm)
sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
uapsd = true;
params[ac].mu_edca = !!mu_edca;
if (mu_edca)
params[ac].mu_edca_param_rec = mu_edca->ac_vo;
break;
case 0: /* AC_BE */
default:
ac = IEEE80211_AC_BE;
if (acm)
sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
uapsd = true;
params[ac].mu_edca = !!mu_edca;
if (mu_edca)
params[ac].mu_edca_param_rec = mu_edca->ac_be;
break;
}
params[ac].aifs = pos[0] & 0x0f;
if (params[ac].aifs < 2) {
sdata_info(sdata,
"AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
params[ac].aifs, aci);
params[ac].aifs = 2;
}
params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
params[ac].txop = get_unaligned_le16(pos + 2);
params[ac].acm = acm;
params[ac].uapsd = uapsd;
if (params[ac].cw_min == 0 ||
params[ac].cw_min > params[ac].cw_max) {
sdata_info(sdata,
"AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
params[ac].cw_min, params[ac].cw_max, aci);
return false;
}
ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
}
/* WMM specification requires all 4 ACIs. */
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
if (params[ac].cw_min == 0) {
sdata_info(sdata,
"AP has invalid WMM params (missing AC %d), using defaults\n",
ac);
return false;
}
}
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
link->tx_conf[ac] = params[ac];
ieee80211_mgd_set_link_qos_params(link);
/* enable WMM or activate new settings */
link->conf->qos = true;
return true;
}
static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
{
lockdep_assert_held(&sdata->local->mtx);
sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
ieee80211_run_deferred_scan(sdata->local);
}
static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
{
mutex_lock(&sdata->local->mtx);
__ieee80211_stop_poll(sdata);
mutex_unlock(&sdata->local->mtx);
}
static u32 ieee80211_handle_bss_capability(struct ieee80211_link_data *link,
u16 capab, bool erp_valid, u8 erp)
{
struct ieee80211_bss_conf *bss_conf = link->conf;
struct ieee80211_supported_band *sband;
u32 changed = 0;
bool use_protection;
bool use_short_preamble;
bool use_short_slot;
sband = ieee80211_get_link_sband(link);
if (!sband)
return changed;
if (erp_valid) {
use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
} else {
use_protection = false;
use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
}
use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
if (sband->band == NL80211_BAND_5GHZ ||
sband->band == NL80211_BAND_6GHZ)
use_short_slot = true;
if (use_protection != bss_conf->use_cts_prot) {
bss_conf->use_cts_prot = use_protection;
changed |= BSS_CHANGED_ERP_CTS_PROT;
}
if (use_short_preamble != bss_conf->use_short_preamble) {
bss_conf->use_short_preamble = use_short_preamble;
changed |= BSS_CHANGED_ERP_PREAMBLE;
}
if (use_short_slot != bss_conf->use_short_slot) {
bss_conf->use_short_slot = use_short_slot;
changed |= BSS_CHANGED_ERP_SLOT;
}
return changed;
}
static u32 ieee80211_link_set_associated(struct ieee80211_link_data *link,
struct cfg80211_bss *cbss)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_bss_conf *bss_conf = link->conf;
struct ieee80211_bss *bss = (void *)cbss->priv;
u32 changed = BSS_CHANGED_QOS;
/* not really used in MLO */
sdata->u.mgd.beacon_timeout =
usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count *
bss_conf->beacon_int));
changed |= ieee80211_handle_bss_capability(link,
bss_conf->assoc_capability,
bss->has_erp_value,
bss->erp_value);
ieee80211_check_rate_mask(link);
link->u.mgd.bss = cbss;
memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
if (sdata->vif.p2p ||
sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
const struct cfg80211_bss_ies *ies;
rcu_read_lock();
ies = rcu_dereference(cbss->ies);
if (ies) {
int ret;
ret = cfg80211_get_p2p_attr(
ies->data, ies->len,
IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
(u8 *) &bss_conf->p2p_noa_attr,
sizeof(bss_conf->p2p_noa_attr));
if (ret >= 2) {
link->u.mgd.p2p_noa_index =
bss_conf->p2p_noa_attr.index;
changed |= BSS_CHANGED_P2P_PS;
}
}
rcu_read_unlock();
}
if (link->u.mgd.have_beacon) {
/*
* If the AP is buggy we may get here with no DTIM period
* known, so assume it's 1 which is the only safe assumption
* in that case, although if the TIM IE is broken powersave
* probably just won't work at all.
*/
bss_conf->dtim_period = link->u.mgd.dtim_period ?: 1;
bss_conf->beacon_rate = bss->beacon_rate;
changed |= BSS_CHANGED_BEACON_INFO;
} else {
bss_conf->beacon_rate = NULL;
bss_conf->dtim_period = 0;
}
/* Tell the driver to monitor connection quality (if supported) */
if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
bss_conf->cqm_rssi_thold)
changed |= BSS_CHANGED_CQM;
return changed;
}
static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgd_assoc_data *assoc_data,
u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
u64 vif_changed = BSS_CHANGED_ASSOC;
unsigned int link_id;
sdata->u.mgd.associated = true;
for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
struct ieee80211_link_data *link;
if (!cbss)
continue;
link = sdata_dereference(sdata->link[link_id], sdata);
if (WARN_ON(!link))
return;
changed[link_id] |= ieee80211_link_set_associated(link, cbss);
}
/* just to be sure */
ieee80211_stop_poll(sdata);
ieee80211_led_assoc(local, 1);
vif_cfg->assoc = 1;
/* Enable ARP filtering */
if (vif_cfg->arp_addr_cnt)
vif_changed |= BSS_CHANGED_ARP_FILTER;
if (sdata->vif.valid_links) {
for (link_id = 0;
link_id < IEEE80211_MLD_MAX_NUM_LINKS;
link_id++) {
struct ieee80211_link_data *link;
struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
if (!cbss)
continue;
link = sdata_dereference(sdata->link[link_id], sdata);
if (WARN_ON(!link))
return;
ieee80211_link_info_change_notify(sdata, link,
changed[link_id]);
ieee80211_recalc_smps(sdata, link);
}
ieee80211_vif_cfg_change_notify(sdata, vif_changed);
} else {
ieee80211_bss_info_change_notify(sdata,
vif_changed | changed[0]);
}
mutex_lock(&local->iflist_mtx);
ieee80211_recalc_ps(local);
mutex_unlock(&local->iflist_mtx);
/* leave this here to not change ordering in non-MLO cases */
if (!sdata->vif.valid_links)
ieee80211_recalc_smps(sdata, &sdata->deflink);
ieee80211_recalc_ps_vif(sdata);
netif_carrier_on(sdata->dev);
}
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
u16 stype, u16 reason, bool tx,
u8 *frame_buf)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_local *local = sdata->local;
unsigned int link_id;
u32 changed = 0;
struct ieee80211_prep_tx_info info = {
.subtype = stype,
};
sdata_assert_lock(sdata);
if (WARN_ON_ONCE(tx && !frame_buf))
return;
if (WARN_ON(!ifmgd->associated))
return;
ieee80211_stop_poll(sdata);
ifmgd->associated = false;
/* other links will be destroyed */
sdata->deflink.u.mgd.bss = NULL;
netif_carrier_off(sdata->dev);
/*
* if we want to get out of ps before disassoc (why?) we have
* to do it before sending disassoc, as otherwise the null-packet
* won't be valid.
*/
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
}
local->ps_sdata = NULL;
/* disable per-vif ps */
ieee80211_recalc_ps_vif(sdata);
/* make sure ongoing transmission finishes */
synchronize_net();
/*
* drop any frame before deauth/disassoc, this can be data or
* management frame. Since we are disconnecting, we should not
* insist sending these frames which can take time and delay
* the disconnection and possible the roaming.
*/
if (tx)
ieee80211_flush_queues(local, sdata, true);
/* deauthenticate/disassociate now */
if (tx || frame_buf) {
/*
* In multi channel scenarios guarantee that the virtual
* interface is granted immediate airtime to transmit the
* deauthentication frame by calling mgd_prepare_tx, if the
* driver requested so.
*/
if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
!sdata->deflink.u.mgd.have_beacon) {
drv_mgd_prepare_tx(sdata->local, sdata, &info);
}
ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr,
sdata->vif.cfg.ap_addr, stype,
reason, tx, frame_buf);
}
/* flush out frame - make sure the deauth was actually sent */
if (tx)
ieee80211_flush_queues(local, sdata, false);
drv_mgd_complete_tx(sdata->local, sdata, &info);
/* clear AP addr only after building the needed mgmt frames */
eth_zero_addr(sdata->deflink.u.mgd.bssid);
eth_zero_addr(sdata->vif.cfg.ap_addr);
sdata->vif.cfg.ssid_len = 0;
/* remove AP and TDLS peers */
sta_info_flush(sdata);
/* finally reset all BSS / config parameters */
if (!sdata->vif.valid_links)
changed |= ieee80211_reset_erp_info(sdata);
ieee80211_led_assoc(local, 0);
changed |= BSS_CHANGED_ASSOC;
sdata->vif.cfg.assoc = false;
sdata->deflink.u.mgd.p2p_noa_index = -1;
memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
sizeof(sdata->vif.bss_conf.p2p_noa_attr));
/* on the next assoc, re-program HT/VHT parameters */
memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
/*
* reset MU-MIMO ownership and group data in default link,
* if used, other links are destroyed
*/
memset(sdata->vif.bss_conf.mu_group.membership, 0,
sizeof(sdata->vif.bss_conf.mu_group.membership));
memset(sdata->vif.bss_conf.mu_group.position, 0,
sizeof(sdata->vif.bss_conf.mu_group.position));
if (!sdata->vif.valid_links)
changed |= BSS_CHANGED_MU_GROUPS;
sdata->vif.bss_conf.mu_mimo_owner = false;
sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
del_timer_sync(&local->dynamic_ps_timer);
cancel_work_sync(&local->dynamic_ps_enable_work);
/* Disable ARP filtering */
if (sdata->vif.cfg.arp_addr_cnt)
changed |= BSS_CHANGED_ARP_FILTER;
sdata->vif.bss_conf.qos = false;
if (!sdata->vif.valid_links) {
changed |= BSS_CHANGED_QOS;
/* The BSSID (not really interesting) and HT changed */
changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ieee80211_bss_info_change_notify(sdata, changed);
} else {
ieee80211_vif_cfg_change_notify(sdata, changed);
}
/* disassociated - set to defaults now */
ieee80211_set_wmm_default(&sdata->deflink, false, false);
del_timer_sync(&sdata->u.mgd.conn_mon_timer);
del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
del_timer_sync(&sdata->u.mgd.timer);
del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer);
sdata->vif.bss_conf.dtim_period = 0;
sdata->vif.bss_conf.beacon_rate = NULL;
sdata->deflink.u.mgd.have_beacon = false;
sdata->deflink.u.mgd.tracking_signal_avg = false;
sdata->deflink.u.mgd.disable_wmm_tracking = false;
ifmgd->flags = 0;
sdata->deflink.u.mgd.conn_flags = 0;
mutex_lock(&local->mtx);
for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
struct ieee80211_link_data *link;
link = sdata_dereference(sdata->link[link_id], sdata);
if (!link)
continue;
ieee80211_link_release_channel(link);
}
sdata->vif.bss_conf.csa_active = false;
sdata->deflink.u.mgd.csa_waiting_bcn = false;
sdata->deflink.u.mgd.csa_ignored_same_chan = false;
if (sdata->deflink.csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->deflink.csa_block_tx = false;
}
mutex_unlock(&local->mtx);
/* existing TX TSPEC sessions no longer exist */
memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
sdata->vif.bss_conf.pwr_reduction = 0;
sdata->vif.bss_conf.tx_pwr_env_num = 0;
memset(sdata->vif.bss_conf.tx_pwr_env, 0,
sizeof(sdata->vif.bss_conf.tx_pwr_env));
ieee80211_vif_set_links(sdata, 0);
}
static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_local *local = sdata->local;
mutex_lock(&local->mtx);
if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
goto out;
__ieee80211_stop_poll(sdata);
mutex_lock(&local->iflist_mtx);
ieee80211_recalc_ps(local);
mutex_unlock(&local->iflist_mtx);
if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
goto out;
/*
* We've received a probe response, but are not sure whether
* we have or will be receiving any beacons or data, so let's
* schedule the timers again, just in case.
*/
ieee80211_sta_reset_beacon_monitor(sdata);
mod_timer(&ifmgd->conn_mon_timer,
round_jiffies_up(jiffies +
IEEE80211_CONNECTION_IDLE_TIME));
out:
mutex_unlock(&local->mtx);
}
static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
struct ieee80211_hdr *hdr,
u16 tx_time)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
u16 tid;
int ac;
struct ieee80211_sta_tx_tspec *tx_tspec;
unsigned long now = jiffies;
if (!ieee80211_is_data_qos(hdr->frame_control))
return;
tid = ieee80211_get_tid(hdr);
ac = ieee80211_ac_from_tid(tid);
tx_tspec = &ifmgd->tx_tspec[ac];
if (likely(!tx_tspec->admitted_time))
return;
if (time_after(now, tx_tspec->time_slice_start + HZ)) {
tx_tspec->consumed_tx_time = 0;
tx_tspec->time_slice_start = now;
if (tx_tspec->downgraded) {
tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
}
}
if (tx_tspec->downgraded)
return;
tx_tspec->consumed_tx_time += tx_time;
if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
tx_tspec->downgraded = true;
tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
}
}
void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
{
ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
if (!ieee80211_is_any_nullfunc(hdr->frame_control) ||
!sdata->u.mgd.probe_send_count)
return;
if (ack)
sdata->u.mgd.probe_send_count = 0;
else
sdata->u.mgd.nullfunc_failed = true;
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
}
static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
const u8 *src, const u8 *dst,
const u8 *ssid, size_t ssid_len,
struct ieee80211_channel *channel)
{
struct sk_buff *skb;
skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
ssid, ssid_len, NULL, 0,
IEEE80211_PROBE_FLAG_DIRECTED);
if (skb)
ieee80211_tx_skb(sdata, skb);
}
static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
u8 *dst = sdata->vif.cfg.ap_addr;
u8 unicast_limit = max(1, max_probe_tries - 3);
struct sta_info *sta;
if (WARN_ON(sdata->vif.valid_links))
return;
/*
* Try sending broadcast probe requests for the last three
* probe requests after the first ones failed since some
* buggy APs only support broadcast probe requests.
*/
if (ifmgd->probe_send_count >= unicast_limit)
dst = NULL;
/*
* When the hardware reports an accurate Tx ACK status, it's
* better to send a nullfunc frame instead of a probe request,
* as it will kick us off the AP quickly if we aren't associated
* anymore. The timeout will be reset if the frame is ACKed by
* the AP.
*/
ifmgd->probe_send_count++;
if (dst) {
mutex_lock(&sdata->local->sta_mtx);
sta = sta_info_get(sdata, dst);
if (!WARN_ON(!sta))
ieee80211_check_fast_rx(sta);
mutex_unlock(&sdata->local->sta_mtx);
}
if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
ifmgd->nullfunc_failed = false;
ieee80211_send_nullfunc(sdata->local, sdata, false);
} else {
ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
sdata->vif.cfg.ssid,
sdata->vif.cfg.ssid_len,
sdata->deflink.u.mgd.bss->channel);
}
ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
run_again(sdata, ifmgd->probe_timeout);
}
static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
bool beacon)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
bool already = false;
if (WARN_ON(sdata->vif.valid_links))
return;
if (!ieee80211_sdata_running(sdata))
return;
sdata_lock(sdata);
if (!ifmgd->associated)
goto out;
mutex_lock(&sdata->local->mtx);
if (sdata->local->tmp_channel || sdata->local->scanning) {
mutex_unlock(&sdata->local->mtx);
goto out;
}
if (sdata->local->suspending) {
/* reschedule after resume */
mutex_unlock(&sdata->local->mtx);
ieee80211_reset_ap_probe(sdata);
goto out;
}
if (beacon) {
mlme_dbg_ratelimited(sdata,
"detected beacon loss from AP (missed %d beacons) - probing\n",
beacon_loss_count);
ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
}
/*
* The driver/our work has already reported this event or the
* connection monitoring has kicked in and we have already sent
* a probe request. Or maybe the AP died and the driver keeps
* reporting until we disassociate...
*
* In either case we have to ignore the current call to this
* function (except for setting the correct probe reason bit)
* because otherwise we would reset the timer every time and
* never check whether we received a probe response!
*/
if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
already = true;
ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
mutex_unlock(&sdata->local->mtx);
if (already)
goto out;
mutex_lock(&sdata->local->iflist_mtx);
ieee80211_recalc_ps(sdata->local);
mutex_unlock(&sdata->local->iflist_mtx);
ifmgd->probe_send_count = 0;
ieee80211_mgd_probe_ap_send(sdata);
out:
sdata_unlock(sdata);
}
struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct cfg80211_bss *cbss;
struct sk_buff *skb;
const struct element *ssid;
int ssid_len;
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
sdata->vif.valid_links))
return NULL;
sdata_assert_lock(sdata);
if (ifmgd->associated)
cbss = sdata->deflink.u.mgd.bss;
else if (ifmgd->auth_data)
cbss = ifmgd->auth_data->bss;
else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss)
cbss = ifmgd->assoc_data->link[0].bss;
else
return NULL;
rcu_read_lock();
ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN,
"invalid SSID element (len=%d)",
ssid ? ssid->datalen : -1))
ssid_len = 0;
else
ssid_len = ssid->datalen;
skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
(u32) -1, cbss->channel,
ssid->data, ssid_len,
NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
rcu_read_unlock();
return skb;
}
EXPORT_SYMBOL(ieee80211_ap_probereq_get);
static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
const u8 *buf, size_t len, bool tx,
u16 reason, bool reconnect)
{
struct ieee80211_event event = {
.type = MLME_EVENT,
.u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
.u.mlme.reason = reason,
};
if (tx)
cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect);
else
cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
drv_event_callback(sdata->local, sdata, &event);
}
static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
bool tx;
sdata_lock(sdata);
if (!ifmgd->associated) {
sdata_unlock(sdata);
return;
}
/* in MLO assume we have a link where we can TX the frame */
tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx;
if (!ifmgd->driver_disconnect) {
unsigned int link_id;
/*
* AP is probably out of range (or not reachable for another
* reason) so remove the bss structs for that AP. In the case
* of multi-link, it's not clear that all of them really are
* out of range, but if they weren't the driver likely would
* have switched to just have a single link active?
*/
for (link_id = 0;
link_id < ARRAY_SIZE(sdata->link);
link_id++) {
struct ieee80211_link_data *link;
link = sdata_dereference(sdata->link[link_id], sdata);
if (!link)
continue;
cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss);
link->u.mgd.bss = NULL;
}
}
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
ifmgd->driver_disconnect ?
WLAN_REASON_DEAUTH_LEAVING :
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
tx, frame_buf);
mutex_lock(&local->mtx);
/* the other links will be destroyed */
sdata->vif.bss_conf.csa_active = false;
sdata->deflink.u.mgd.csa_waiting_bcn = false;
if (sdata->deflink.csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->deflink.csa_block_tx = false;
}
mutex_unlock(&local->mtx);
ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
ifmgd->reconnect);
ifmgd->reconnect = false;
sdata_unlock(sdata);
}
static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
{
struct ieee80211_sub_if_data *sdata =
container_of(work, struct ieee80211_sub_if_data,
u.mgd.beacon_connection_loss_work);
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
if (ifmgd->connection_loss) {
sdata_info(sdata, "Connection to AP %pM lost\n",
sdata->vif.cfg.ap_addr);
__ieee80211_disconnect(sdata);
ifmgd->connection_loss = false;
} else if (ifmgd->driver_disconnect) {
sdata_info(sdata,
"Driver requested disconnection from AP %pM\n",
sdata->vif.cfg.ap_addr);
__ieee80211_disconnect(sdata);
ifmgd->driver_disconnect = false;
} else {
if (ifmgd->associated)
sdata->deflink.u.mgd.beacon_loss_count++;
ieee80211_mgd_probe_ap(sdata, true);
}
}
static void ieee80211_csa_connection_drop_work(struct work_struct *work)
{
struct ieee80211_sub_if_data *sdata =
container_of(work, struct ieee80211_sub_if_data,
u.mgd.csa_connection_drop_work);
__ieee80211_disconnect(sdata);
}
void ieee80211_beacon_loss(struct ieee80211_vif *vif)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_hw *hw = &sdata->local->hw;
trace_api_beacon_loss(sdata);
sdata->u.mgd.connection_loss = false;
ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
}
EXPORT_SYMBOL(ieee80211_beacon_loss);
void ieee80211_connection_loss(struct ieee80211_vif *vif)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_hw *hw = &sdata->local->hw;
trace_api_connection_loss(sdata);
sdata->u.mgd.connection_loss = true;
ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
}
EXPORT_SYMBOL(ieee80211_connection_loss);
void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_hw *hw = &sdata->local->hw;
trace_api_disconnect(sdata, reconnect);
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
return;
sdata->u.mgd.driver_disconnect = true;
sdata->u.mgd.reconnect = reconnect;
ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
}
EXPORT_SYMBOL(ieee80211_disconnect);
static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
bool assoc)
{
struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
sdata_assert_lock(sdata);
if (!assoc) {
/*
* we are not authenticated yet, the only timer that could be
* running is the timeout for the authentication response which
* which is not relevant anymore.
*/
del_timer_sync(&sdata->u.mgd.timer);
sta_info_destroy_addr(sdata, auth_data->ap_addr);
/* other links are destroyed */
sdata->deflink.u.mgd.conn_flags = 0;
eth_zero_addr(sdata->deflink.u.mgd.bssid);
ieee80211_link_info_change_notify(sdata, &sdata->deflink,
BSS_CHANGED_BSSID);
sdata->u.mgd.flags = 0;
mutex_lock(&sdata->local->mtx);
ieee80211_link_release_channel(&sdata->deflink);
ieee80211_vif_set_links(sdata, 0);
mutex_unlock(&sdata->local->mtx);
}
cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
kfree(auth_data);
sdata->u.mgd.auth_data = NULL;
}
enum assoc_status {
ASSOC_SUCCESS,
ASSOC_REJECTED,
ASSOC_TIMEOUT,
ASSOC_ABANDON,
};
static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
enum assoc_status status)
{
struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
sdata_assert_lock(sdata);
if (status != ASSOC_SUCCESS) {
/*
* we are not associated yet, the only timer that could be
* running is the timeout for the association response which
* which is not relevant anymore.
*/
del_timer_sync(&sdata->u.mgd.timer);
sta_info_destroy_addr(sdata, assoc_data->ap_addr);
sdata->deflink.u.mgd.conn_flags = 0;
eth_zero_addr(sdata->deflink.u.mgd.bssid);
ieee80211_link_info_change_notify(sdata, &sdata->deflink,
BSS_CHANGED_BSSID);
sdata->u.mgd.flags = 0;
sdata->vif.bss_conf.mu_mimo_owner = false;
if (status != ASSOC_REJECTED) {
struct cfg80211_assoc_failure data = {
.timeout = status == ASSOC_TIMEOUT,
};
int i;
BUILD_BUG_ON(ARRAY_SIZE(data.bss) !=
ARRAY_SIZE(assoc_data->link));
for (i = 0; i < ARRAY_SIZE(data.bss); i++)
data.bss[i] = assoc_data->link[i].bss;
if (sdata->vif.valid_links)
data.ap_mld_addr = assoc_data->ap_addr;
cfg80211_assoc_failure(sdata->dev, &data);
}
mutex_lock(&sdata->local->mtx);
ieee80211_link_release_channel(&sdata->deflink);
ieee80211_vif_set_links(sdata, 0);
mutex_unlock(&sdata->local->mtx);
}
kfree(assoc_data);
sdata->u.mgd.assoc_data = NULL;
}
static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt, size_t len)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
const struct element *challenge;
u8 *pos;
u32 tx_flags = 0;
struct ieee80211_prep_tx_info info = {
.subtype = IEEE80211_STYPE_AUTH,
};
pos = mgmt->u.auth.variable;
challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos,
len - (pos - (u8 *)mgmt));
if (!challenge)
return;
auth_data->expected_transaction = 4;
drv_mgd_prepare_tx(sdata->local, sdata, &info);
if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
IEEE80211_TX_INTFL_MLME_CONN_TX;
ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
(void *)challenge,
challenge->datalen + sizeof(*challenge),
auth_data->ap_addr, auth_data->ap_addr,
auth_data->key, auth_data->key_len,
auth_data->key_idx, tx_flags);
}
static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
const u8 *ap_addr = ifmgd->auth_data->ap_addr;
struct sta_info *sta;
bool result = true;
sdata_info(sdata, "authenticated\n");
ifmgd->auth_data->done = true;
ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
ifmgd->auth_data->timeout_started = true;
run_again(sdata, ifmgd->auth_data->timeout);
/* move station state to auth */
mutex_lock(&sdata->local->sta_mtx);
sta = sta_info_get(sdata, ap_addr);
if (!sta) {
WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr);
result = false;
goto out;
}
if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
sdata_info(sdata, "failed moving %pM to auth\n", ap_addr);
result = false;
goto out;
}
out:
mutex_unlock(&sdata->local->sta_mtx);
return result;
}
static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt, size_t len)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
u16 auth_alg, auth_transaction, status_code;
struct ieee80211_event event = {
.type = MLME_EVENT,
.u.mlme.data = AUTH_EVENT,
};
struct ieee80211_prep_tx_info info = {
.subtype = IEEE80211_STYPE_AUTH,
};
sdata_assert_lock(sdata);
if (len < 24 + 6)
return;
if (!ifmgd->auth_data || ifmgd->auth_data->done)
return;
if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid))
return;
auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
status_code = le16_to_cpu(mgmt->u.auth.status_code);
if (auth_alg != ifmgd->auth_data->algorithm ||
(auth_alg != WLAN_AUTH_SAE &&
auth_transaction != ifmgd->auth_data->expected_transaction) ||
(auth_alg == WLAN_AUTH_SAE &&
(auth_transaction < ifmgd->auth_data->expected_transaction ||
auth_transaction > 2))) {
sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
auth_transaction,
ifmgd->auth_data->expected_transaction);
goto notify_driver;
}
if (status_code != WLAN_STATUS_SUCCESS) {
cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
if (auth_alg == WLAN_AUTH_SAE &&
(status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
(auth_transaction == 1 &&
(status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
status_code == WLAN_STATUS_SAE_PK)))) {
/* waiting for userspace now */
ifmgd->auth_data->waiting = true;
ifmgd->auth_data->timeout =
jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY;
ifmgd->auth_data->timeout_started = true;
run_again(sdata, ifmgd->auth_data->timeout);
goto notify_driver;
}
sdata_info(sdata, "%pM denied authentication (status %d)\n",
mgmt->sa, status_code);
ieee80211_destroy_auth_data(sdata, false);
event.u.mlme.status = MLME_DENIED;
event.u.mlme.reason = status_code;
drv_event_callback(sdata->local, sdata, &event);
goto notify_driver;
}
switch (ifmgd->auth_data->algorithm) {
case WLAN_AUTH_OPEN:
case WLAN_AUTH_LEAP:
case WLAN_AUTH_FT:
case WLAN_AUTH_SAE:
case WLAN_AUTH_FILS_SK:
case WLAN_AUTH_FILS_SK_PFS:
case WLAN_AUTH_FILS_PK:
break;
case WLAN_AUTH_SHARED_KEY:
if (ifmgd->auth_data->expected_transaction != 4) {
ieee80211_auth_challenge(sdata, mgmt, len);
/* need another frame */
return;
}
break;
default:
WARN_ONCE(1, "invalid auth alg %d",
ifmgd->auth_data->algorithm);
goto notify_driver;
}
event.u.mlme.status = MLME_SUCCESS;
info.success = 1;
drv_event_callback(sdata->local, sdata, &event);
if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
(auth_transaction == 2 &&
ifmgd->auth_data->expected_transaction == 2)) {
if (!ieee80211_mark_sta_auth(sdata))
return; /* ignore frame -- wait for timeout */
} else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
auth_transaction == 2) {
sdata_info(sdata, "SAE peer confirmed\n");
ifmgd->auth_data->peer_confirmed = true;
}
cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
notify_driver:
drv_mgd_complete_tx(sdata->local, sdata, &info);
}
#define case_WLAN(type) \
case WLAN_REASON_##type: return #type
const char *ieee80211_get_reason_code_string(u16 reason_code)
{
switch (reason_code) {
case_WLAN(UNSPECIFIED);
case_WLAN(PREV_AUTH_NOT_VALID);
case_WLAN(DEAUTH_LEAVING);
case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
case_WLAN(DISASSOC_AP_BUSY);
case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
case_WLAN(DISASSOC_STA_HAS_LEFT);
case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
case_WLAN(DISASSOC_BAD_POWER);
case_WLAN(DISASSOC_BAD_SUPP_CHAN);
case_WLAN(INVALID_IE);
case_WLAN(MIC_FAILURE);
case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
case_WLAN(IE_DIFFERENT);
case_WLAN(INVALID_GROUP_CIPHER);
case_WLAN(INVALID_PAIRWISE_CIPHER);
case_WLAN(INVALID_AKMP);
case_WLAN(UNSUPP_RSN_VERSION);
case_WLAN(INVALID_RSN_IE_CAP);
case_WLAN(IEEE8021X_FAILED);
case_WLAN(CIPHER_SUITE_REJECTED);
case_WLAN(DISASSOC_UNSPECIFIED_QOS);
case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
case_WLAN(DISASSOC_LOW_ACK);
case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
case_WLAN(QSTA_LEAVE_QBSS);
case_WLAN(QSTA_NOT_USE);
case_WLAN(QSTA_REQUIRE_SETUP);
case_WLAN(QSTA_TIMEOUT);
case_WLAN(QSTA_CIPHER_NOT_SUPP);
case_WLAN(MESH_PEER_CANCELED);
case_WLAN(MESH_MAX_PEERS);
case_WLAN(MESH_CONFIG);
case_WLAN(MESH_CLOSE);
case_WLAN(MESH_MAX_RETRIES);
case_WLAN(MESH_CONFIRM_TIMEOUT);
case_WLAN(MESH_INVALID_GTK);
case_WLAN(MESH_INCONSISTENT_PARAM);
case_WLAN(MESH_INVALID_SECURITY);
case_WLAN(MESH_PATH_ERROR);
case_WLAN(MESH_PATH_NOFORWARD);
case_WLAN(MESH_PATH_DEST_UNREACHABLE);
case_WLAN(MAC_EXISTS_IN_MBSS);
case_WLAN(MESH_CHAN_REGULATORY);
case_WLAN(MESH_CHAN);
default: return "<unknown>";
}
}
static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt, size_t len)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
sdata_assert_lock(sdata);
if (len < 24 + 2)
return;
if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
return;
}
if (ifmgd->associated &&
ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) {
sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
sdata->vif.cfg.ap_addr, reason_code,
ieee80211_get_reason_code_string(reason_code));
ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
reason_code, false);
return;
}
if (ifmgd->assoc_data &&
ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) {
sdata_info(sdata,
"deauthenticated from %pM while associating (Reason: %u=%s)\n",
ifmgd->assoc_data->ap_addr, reason_code,
ieee80211_get_reason_code_string(reason_code));
ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
return;
}
}
static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt, size_t len)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
u16 reason_code;
sdata_assert_lock(sdata);
if (len < 24 + 2)
return;
if (!ifmgd->associated ||
!ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr))
return;
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
return;
}
sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
sdata->vif.cfg.ap_addr, reason_code,
ieee80211_get_reason_code_string(reason_code));
ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code,
false);
}
static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
u8 *supp_rates, unsigned int supp_rates_len,
u32 *rates, u32 *basic_rates,
bool *have_higher_than_11mbit,
int *min_rate, int *min_rate_index,
int shift)
{
int i, j;
for (i = 0; i < supp_rates_len; i++) {
int rate = supp_rates[i] & 0x7f;
bool is_basic = !!(supp_rates[i] & 0x80);
if ((rate * 5 * (1 << shift)) > 110)
*have_higher_than_11mbit = true;
/*
* Skip HT, VHT, HE and SAE H2E only BSS membership selectors
* since they're not rates.
*
* Note: Even though the membership selector and the basic
* rate flag share the same bit, they are not exactly
* the same.
*/
if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) ||
supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E))
continue;
for (j = 0; j < sband->n_bitrates; j++) {
struct ieee80211_rate *br;
int brate;
br = &sband->bitrates[j];
brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
if (brate == rate) {
*rates |= BIT(j);
if (is_basic)
*basic_rates |= BIT(j);
if ((rate * 5) < *min_rate) {
*min_rate = rate * 5;
*min_rate_index = j;
}
break;
}
}
}
}
static bool ieee80211_twt_req_supported(const struct link_sta_info *link_sta,
const struct ieee802_11_elems *elems)
{
if (elems->ext_capab_len < 10)
return false;
if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
return false;
return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] &
IEEE80211_HE_MAC_CAP0_TWT_RES;
}
static int ieee80211_recalc_twt_req(struct ieee80211_link_data *link,
struct link_sta_info *link_sta,
struct ieee802_11_elems *elems)
{
bool twt = ieee80211_twt_req_supported(link_sta, elems);
if (link->conf->twt_requester != twt) {
link->conf->twt_requester = twt;
return BSS_CHANGED_TWT;
}
return 0;
}
static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
struct ieee80211_bss_conf *bss_conf,
struct ieee80211_supported_band *sband,
struct link_sta_info *link_sta)
{
const struct ieee80211_sta_he_cap *own_he_cap =
ieee80211_get_he_iftype_cap(sband,
ieee80211_vif_type_p2p(&sdata->vif));
return bss_conf->he_support &&
(link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] &
IEEE80211_HE_MAC_CAP2_BCAST_TWT) &&
own_he_cap &&
(own_he_cap->he_cap_elem.mac_cap_info[2] &
IEEE80211_HE_MAC_CAP2_BCAST_TWT);
}
static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link,
struct link_sta_info *link_sta,
struct cfg80211_bss *cbss,
struct ieee80211_mgmt *mgmt,
const u8 *elem_start,
unsigned int elem_len,
u64 *changed)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
struct ieee80211_bss_conf *bss_conf = link->conf;
struct ieee80211_local *local = sdata->local;
struct ieee80211_elems_parse_params parse_params = {
.start = elem_start,
.len = elem_len,
.bss = cbss,
.link_id = link == &sdata->deflink ? -1 : link->link_id,
.from_ap = true,
};
bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
const struct cfg80211_bss_ies *bss_ies = NULL;
struct ieee80211_supported_band *sband;
struct ieee802_11_elems *elems;
u16 capab_info;
bool ret;
elems = ieee802_11_parse_elems_full(&parse_params);
if (!elems)
return false;
/* FIXME: use from STA profile element after parsing that */
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
if (!is_s1g && !elems->supp_rates) {
sdata_info(sdata, "no SuppRates element in AssocResp\n");
ret = false;
goto out;
}
link->u.mgd.tdls_chan_switch_prohibited =
elems->ext_capab && elems->ext_capab_len >= 5 &&
(elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
/*
* Some APs are erroneously not including some information in their
* (re)association response frames. Try to recover by using the data
* from the beacon or probe response. This seems to afflict mobile
* 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
* "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
*/
if (!is_6ghz &&
((assoc_data->wmm && !elems->wmm_param) ||
(!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
(!elems->ht_cap_elem || !elems->ht_operation)) ||
(!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
(!elems->vht_cap_elem || !elems->vht_operation)))) {
const struct cfg80211_bss_ies *ies;
struct ieee802_11_elems *bss_elems;
rcu_read_lock();
ies = rcu_dereference(cbss->ies);
if (ies)
bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
GFP_ATOMIC);
rcu_read_unlock();
if (!bss_ies) {
ret = false;
goto out;
}
parse_params.start = bss_ies->data;
parse_params.len = bss_ies->len;
bss_elems = ieee802_11_parse_elems_full(&parse_params);
if (!bss_elems) {
ret = false;
goto out;
}
if (assoc_data->wmm &&
!elems->wmm_param && bss_elems->wmm_param) {
elems->wmm_param = bss_elems->wmm_param;
sdata_info(sdata,
"AP bug: WMM param missing from AssocResp\n");
}
/*
* Also check if we requested HT/VHT, otherwise the AP doesn't
* have to include the IEs in the (re)association response.
*/
if (!elems->ht_cap_elem && bss_elems->ht_cap_elem &&
!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
elems->ht_cap_elem = bss_elems->ht_cap_elem;
sdata_info(sdata,
"AP bug: HT capability missing from AssocResp\n");
}
if (!elems->ht_operation && bss_elems->ht_operation &&
!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
elems->ht_operation = bss_elems->ht_operation;
sdata_info(sdata,
"AP bug: HT operation missing from AssocResp\n");
}
if (!elems->vht_cap_elem && bss_elems->vht_cap_elem &&
!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
elems->vht_cap_elem = bss_elems->vht_cap_elem;
sdata_info(sdata,
"AP bug: VHT capa missing from AssocResp\n");
}
if (!elems->vht_operation && bss_elems->vht_operation &&
!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
elems->vht_operation = bss_elems->vht_operation;
sdata_info(sdata,
"AP bug: VHT operation missing from AssocResp\n");
}
kfree(bss_elems);
}
/*
* We previously checked these in the beacon/probe response, so
* they should be present here. This is just a safety net.
*/
if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
(!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
sdata_info(sdata,
"HT AP is missing WMM params or HT capability/operation\n");
ret = false;
goto out;
}
if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
(!elems->vht_cap_elem || !elems->vht_operation)) {
sdata_info(sdata,
"VHT AP is missing VHT capability/operation\n");
ret = false;
goto out;
}
if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
!elems->he_6ghz_capa) {
sdata_info(sdata,
"HE 6 GHz AP is missing HE 6 GHz band capability\n");
ret = false;
goto out;
}
if (WARN_ON(!link->conf->chandef.chan)) {
ret = false;
goto out;
}
sband = local->hw.wiphy->bands[link->conf->chandef.chan->band];
if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
(!elems->he_cap || !elems->he_operation)) {
sdata_info(sdata,
"HE AP is missing HE capability/operation\n");
ret = false;
goto out;
}
/* Set up internal HT/VHT capabilities */
if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT))
ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
elems->ht_cap_elem,
link_sta);
if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT))
ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
elems->vht_cap_elem,
link_sta);
if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
elems->he_cap) {
ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
elems->he_cap,
elems->he_cap_len,
elems->he_6ghz_capa,
link_sta);
bss_conf->he_support = link_sta->pub->he_cap.has_he;
if (elems->rsnx && elems->rsnx_len &&
(elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
wiphy_ext_feature_isset(local->hw.wiphy,
NL80211_EXT_FEATURE_PROTECTED_TWT))
bss_conf->twt_protected = true;
else
bss_conf->twt_protected = false;
*changed |= ieee80211_recalc_twt_req(link, link_sta, elems);
if (elems->eht_operation && elems->eht_cap &&
!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) {
ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
elems->he_cap,
elems->he_cap_len,
elems->eht_cap,
elems->eht_cap_len,
link_sta);
bss_conf->eht_support = link_sta->pub->eht_cap.has_eht;
} else {
bss_conf->eht_support = false;
}
} else {
bss_conf->he_support = false;
bss_conf->twt_requester = false;
bss_conf->twt_protected = false;
bss_conf->eht_support = false;
}
bss_conf->twt_broadcast =
ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta);
if (bss_conf->he_support) {
bss_conf->he_bss_color.color =
le32_get_bits(elems->he_operation->he_oper_params,
IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
bss_conf->he_bss_color.partial =
le32_get_bits(elems->he_operation->he_oper_params,
IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
bss_conf->he_bss_color.enabled =
!le32_get_bits(elems->he_operation->he_oper_params,
IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
if (bss_conf->he_bss_color.enabled)
*changed |= BSS_CHANGED_HE_BSS_COLOR;
bss_conf->htc_trig_based_pkt_ext =
le32_get_bits(elems->he_operation->he_oper_params,
IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
bss_conf->frame_time_rts_th =
le32_get_bits(elems->he_operation->he_oper_params,
IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
bss_conf->uora_exists = !!elems->uora_element;
if (elems->uora_element)
bss_conf->uora_ocw_range = elems->uora_element[0];
ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
/* TODO: OPEN: what happens if BSS color disable is set? */
}
if (cbss->transmitted_bss) {
bss_conf->nontransmitted = true;
ether_addr_copy(bss_conf->transmitter_bssid,
cbss->transmitted_bss->bssid);
bss_conf->bssid_indicator = cbss->max_bssid_indicator;
bss_conf->bssid_index = cbss->bssid_index;
}
/*
* Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
* in their association response, so ignore that data for our own
* configuration. If it changed since the last beacon, we'll get the
* next beacon and update then.
*/
/*
* If an operating mode notification IE is present, override the
* NSS calculation (that would be done in rate_control_rate_init())
* and use the # of streams from that element.
*/
if (elems->opmode_notif &&
!(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
u8 nss;
nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
nss += 1;
link_sta->pub->rx_nss = nss;
}
/*
* Always handle WMM once after association regardless
* of the first value the AP uses. Setting -1 here has
* that effect because the AP values is an unsigned
* 4-bit value.
*/
link->u.mgd.wmm_last_param_set = -1;
link->u.mgd.mu_edca_last_param_set = -1;
if (link->u.mgd.disable_wmm_tracking) {
ieee80211_set_wmm_default(link, false, false);
} else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param,
elems->wmm_param_len,
elems->mu_edca_param_set)) {
/* still enable QoS since we might have HT/VHT */
ieee80211_set_wmm_default(link, false, true);
/* disable WMM tracking in this case to disable
* tracking WMM parameter changes in the beacon if
* the parameters weren't actually valid. Doing so
* avoids changing parameters very strangely when
* the AP is going back and forth between valid and
* invalid parameters.
*/
link->u.mgd.disable_wmm_tracking = true;
}
if (elems->max_idle_period_ie) {
bss_conf->max_idle_period =
le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
bss_conf->protected_keep_alive =
!!(elems->max_idle_period_ie->idle_options &
WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
*changed |= BSS_CHANGED_KEEP_ALIVE;
} else {
bss_conf->max_idle_period = 0;
bss_conf->protected_keep_alive = false;
}
/* set assoc capability (AID was already set earlier),
* ieee80211_set_associated() will tell the driver */
bss_conf->assoc_capability = capab_info;
ret = true;
out:
kfree(elems);
kfree(bss_ies);
return ret;
}
static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link,
struct sta_info *sta,
struct link_sta_info *link_sta,
struct cfg80211_bss *cbss)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
struct ieee80211_bss *bss = (void *)cbss->priv;
u32 rates = 0, basic_rates = 0;
bool have_higher_than_11mbit = false;
int min_rate = INT_MAX, min_rate_index = -1;
/* this is clearly wrong for MLO but we'll just remove it later */
int shift = ieee80211_vif_get_shift(&sdata->vif);
struct ieee80211_supported_band *sband;
memcpy(link_sta->addr, cbss->bssid, ETH_ALEN);
memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN);
/* TODO: S1G Basic Rate Set is expressed elsewhere */
if (cbss->channel->band == NL80211_BAND_S1GHZ) {
ieee80211_s1g_sta_rate_init(sta);
return 0;
}
sband = local->hw.wiphy->bands[cbss->channel->band];
ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len,
&rates, &basic_rates, &have_higher_than_11mbit,
&min_rate, &min_rate_index, shift);
/*
* This used to be a workaround for basic rates missing
* in the association response frame. Now that we no
* longer use the basic rates from there, it probably
* doesn't happen any more, but keep the workaround so
* in case some *other* APs are buggy in different ways
* we can connect -- with a warning.
* Allow this workaround only in case the AP provided at least
* one rate.
*/
if (min_rate_index < 0) {
link_info(link, "No legacy rates in association response\n");
return -EINVAL;
} else if (!basic_rates) {
link_info(link, "No basic rates, using min rate instead\n");
basic_rates = BIT(min_rate_index);
}
if (rates)
link_sta->pub->supp_rates[cbss->channel->band] = rates;
else
link_info(link, "No rates found, keeping mandatory only\n");
link->conf->basic_rates = basic_rates;
/* cf. IEEE 802.11 9.2.12 */
link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ &&
have_higher_than_11mbit;
return 0;
}
static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link,
struct cfg80211_bss *cbss)
{
struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
const struct element *ht_cap_elem, *vht_cap_elem;
const struct cfg80211_bss_ies *ies;
const struct ieee80211_ht_cap *ht_cap;
const struct ieee80211_vht_cap *vht_cap;
const struct ieee80211_he_cap_elem *he_cap;
const struct element *he_cap_elem;
u16 mcs_80_map, mcs_160_map;
int i, mcs_nss_size;
bool support_160;
u8 chains = 1;
if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)
return chains;
ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY);
if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) {
ht_cap = (void *)ht_cap_elem->data;
chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
/*
* TODO: use "Tx Maximum Number Spatial Streams Supported" and
* "Tx Unequal Modulation Supported" fields.
*/
}
if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)
return chains;
vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) {
u8 nss;
u16 tx_mcs_map;
vht_cap = (void *)vht_cap_elem->data;
tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
for (nss = 8; nss > 0; nss--) {
if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
IEEE80211_VHT_MCS_NOT_SUPPORTED)
break;
}
/* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
chains = max(chains, nss);
}
if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE)
return chains;
ies = rcu_dereference(cbss->ies);
he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
ies->data, ies->len);
if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap))
return chains;
/* skip one byte ext_tag_id */
he_cap = (void *)(he_cap_elem->data + 1);
mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
/* invalid HE IE */
if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap))
return chains;
/* mcs_nss is right after he_cap info */
he_mcs_nss_supp = (void *)(he_cap + 1);
mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
for (i = 7; i >= 0; i--) {
u8 mcs_80 = mcs_80_map >> (2 * i) & 3;
if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
chains = max_t(u8, chains, i + 1);
break;
}
}
support_160 = he_cap->phy_cap_info[0] &
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
if (!support_160)
return chains;
mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160);
for (i = 7; i >= 0; i--) {
u8 mcs_160 = mcs_160_map >> (2 * i) & 3;
if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
chains = max_t(u8, chains, i + 1);
break;
}
}
return chains;
}
static bool
ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
const struct cfg80211_bss_ies *ies,
const struct ieee80211_he_operation *he_op)
{
const struct element *he_cap_elem;
const struct ieee80211_he_cap_elem *he_cap;
struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
u16 mcs_80_map_tx, mcs_80_map_rx;
u16 ap_min_req_set;
int mcs_nss_size;
int nss;
he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
ies->data, ies->len);
if (!he_cap_elem)
return false;
/* invalid HE IE */
if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) {
sdata_info(sdata,
"Invalid HE elem, Disable HE\n");
return false;
}
/* skip one byte ext_tag_id */
he_cap = (void *)(he_cap_elem->data + 1);
mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
/* invalid HE IE */
if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) {
sdata_info(sdata,
"Invalid HE elem with nss size, Disable HE\n");
return false;
}
/* mcs_nss is right after he_cap info */
he_mcs_nss_supp = (void *)(he_cap + 1);
mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
/* P802.11-REVme/D0.3
* 27.1.1 Introduction to the HE PHY
* ...
* An HE STA shall support the following features:
* ...
* Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
* supported channel widths for HE SU PPDUs
*/
if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED ||
(mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
sdata_info(sdata,
"Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
mcs_80_map_tx, mcs_80_map_rx);
return false;
}
if (!he_op)
return true;
ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
/*
* Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
* zeroes, which is nonsense, and completely inconsistent with itself
* (it doesn't have 8 streams). Accept the settings in this case anyway.
*/
if (!ap_min_req_set)
return true;
/* make sure the AP is consistent with itself
*
* P802.11-REVme/D0.3
* 26.17.1 Basic HE BSS operation
*
* A STA that is operating in an HE BSS shall be able to receive and
* transmit at each of the <HE-MCS, NSS> tuple values indicated by the
* Basic HE-MCS And NSS Set field of the HE Operation parameter of the
* MLME-START.request primitive and shall be able to receive at each of
* the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
* NSS Set field in the HE Capabilities parameter of the MLMESTART.request
* primitive
*/
for (nss = 8; nss > 0; nss--) {
u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
u8 ap_rx_val;
u8 ap_tx_val;
if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
continue;
ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3;
ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3;
if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) {
sdata_info(sdata,
"Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
nss, ap_rx_val, ap_rx_val, ap_op_val);
return false;
}
}
return true;
}
static bool
ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
const struct ieee80211_he_operation *he_op)
{
const struct ieee80211_sta_he_cap *sta_he_cap =
ieee80211_get_he_iftype_cap(sband,
ieee80211_vif_type_p2p(&sdata->vif));
u16 ap_min_req_set;
int i;
if (!sta_he_cap || !he_op)
return false;
ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
/*
* Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
* zeroes, which is nonsense, and completely inconsistent with itself
* (it doesn't have 8 streams). Accept the settings in this case anyway.
*/
if (!ap_min_req_set)
return true;
/* Need to go over for 80MHz, 160MHz and for 80+80 */
for (i = 0; i < 3; i++) {
const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
&sta_he_cap->he_mcs_nss_supp;
u16 sta_mcs_map_rx =
le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
u16 sta_mcs_map_tx =
le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
u8 nss;
bool verified = true;
/*
* For each band there is a maximum of 8 spatial streams
* possible. Each of the sta_mcs_map_* is a 16-bit struct built
* of 2 bits per NSS (1-8), with the values defined in enum
* ieee80211_he_mcs_support. Need to make sure STA TX and RX
* capabilities aren't less than the AP's minimum requirements
* for this HE BSS per SS.
* It is enough to find one such band that meets the reqs.
*/
for (nss = 8; nss > 0; nss--) {
u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
continue;
/*
* Make sure the HE AP doesn't require MCSs that aren't
* supported by the client as required by spec
*
* P802.11-REVme/D0.3
* 26.17.1 Basic HE BSS operation
*
* An HE STA shall not attempt to join * (MLME-JOIN.request primitive)
* a BSS, unless it supports (i.e., is able to both transmit and
* receive using) all of the <HE-MCS, NSS> tuples in the basic
* HE-MCS and NSS set.
*/
if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
(ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
verified = false;
break;
}
}
if (verified)
return true;
}
/* If here, STA doesn't meet AP's HE min requirements */
return false;
}
static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
struct ieee80211_link_data *link,
struct cfg80211_bss *cbss,
ieee80211_conn_flags_t *conn_flags)
{
struct ieee80211_local *local = sdata->local;
const struct ieee80211_ht_cap *ht_cap = NULL;
const struct ieee80211_ht_operation *ht_oper = NULL;
const struct ieee80211_vht_operation *vht_oper = NULL;
const struct ieee80211_he_operation *he_oper = NULL;
const struct ieee80211_eht_operation *eht_oper = NULL;
const struct ieee80211_s1g_oper_ie *s1g_oper = NULL;
struct ieee80211_supported_band *sband;
struct cfg80211_chan_def chandef;
bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
struct ieee80211_bss *bss = (void *)cbss->priv;
struct ieee80211_elems_parse_params parse_params = {
.bss = cbss,
.link_id = -1,
.from_ap = true,
};
struct ieee802_11_elems *elems;
const struct cfg80211_bss_ies *ies;
int ret;
u32 i;
bool have_80mhz;
rcu_read_lock();
ies = rcu_dereference(cbss->ies);
parse_params.start = ies->data;
parse_params.len = ies->len;
elems = ieee802_11_parse_elems_full(&parse_params);
if (!elems) {
rcu_read_unlock();
return -ENOMEM;
}
sband = local->hw.wiphy->bands[cbss->channel->band];
*conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ |
IEEE80211_CONN_DISABLE_80P80MHZ |
IEEE80211_CONN_DISABLE_160MHZ);
/* disable HT/VHT/HE if we don't support them */
if (!sband->ht_cap.ht_supported && !is_6ghz) {
mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n");
*conn_flags |= IEEE80211_CONN_DISABLE_HT;
*conn_flags |= IEEE80211_CONN_DISABLE_VHT;
*conn_flags |= IEEE80211_CONN_DISABLE_HE;
*conn_flags |= IEEE80211_CONN_DISABLE_EHT;
}
if (!sband->vht_cap.vht_supported && is_5ghz) {
mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n");
*conn_flags |= IEEE80211_CONN_DISABLE_VHT;
*conn_flags |= IEEE80211_CONN_DISABLE_HE;
*conn_flags |= IEEE80211_CONN_DISABLE_EHT;
}
if (!ieee80211_get_he_iftype_cap(sband,
ieee80211_vif_type_p2p(&sdata->vif))) {
mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n");
*conn_flags |= IEEE80211_CONN_DISABLE_HE;
*conn_flags |= IEEE80211_CONN_DISABLE_EHT;
}
if (!ieee80211_get_eht_iftype_cap(sband,
ieee80211_vif_type_p2p(&sdata->vif))) {
mlme_dbg(sdata, "EHT not supported, disabling EHT\n");
*conn_flags |= IEEE80211_CONN_DISABLE_EHT;
}
if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) {
ht_oper = elems->ht_operation;
ht_cap = elems->ht_cap_elem;
if (!ht_cap) {
*conn_flags |= IEEE80211_CONN_DISABLE_HT;
ht_oper = NULL;
}
}
if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) {
vht_oper = elems->vht_operation;
if (vht_oper && !ht_oper) {
vht_oper = NULL;
sdata_info(sdata,
"AP advertised VHT without HT, disabling HT/VHT/HE\n");
*conn_flags |= IEEE80211_CONN_DISABLE_HT;
*conn_flags |= IEEE80211_CONN_DISABLE_VHT;
*conn_flags |= IEEE80211_CONN_DISABLE_HE;
*conn_flags |= IEEE80211_CONN_DISABLE_EHT;
}
if (!elems->vht_cap_elem) {
*conn_flags |= IEEE80211_CONN_DISABLE_VHT;
vht_oper = NULL;
}
}
if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) {
he_oper = elems->he_operation;
if (link && is_6ghz) {
struct ieee80211_bss_conf *bss_conf;
u8 j = 0;
bss_conf = link->conf;
if (elems->pwr_constr_elem)
bss_conf->pwr_reduction = *elems->pwr_constr_elem;
BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) !=
ARRAY_SIZE(elems->tx_pwr_env));
for (i = 0; i < elems->tx_pwr_env_num; i++) {
if (elems->tx_pwr_env_len[i] >
sizeof(bss_conf->tx_pwr_env[j]))
continue;
bss_conf->tx_pwr_env_num++;
memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i],
elems->tx_pwr_env_len[i]);
j++;
}
}
if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) ||
!ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
*conn_flags |= IEEE80211_CONN_DISABLE_HE |
IEEE80211_CONN_DISABLE_EHT;
}
/*
* EHT requires HE to be supported as well. Specifically for 6 GHz
* channels, the operation channel information can only be deduced from
* both the 6 GHz operation information (from the HE operation IE) and
* EHT operation.
*/
if (!(*conn_flags &
(IEEE80211_CONN_DISABLE_HE |
IEEE80211_CONN_DISABLE_EHT)) &&
he_oper) {
const struct cfg80211_bss_ies *cbss_ies;
const u8 *eht_oper_ie;
cbss_ies = rcu_dereference(cbss->ies);
eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION,
cbss_ies->data, cbss_ies->len);
if (eht_oper_ie && eht_oper_ie[1] >=
1 + sizeof(struct ieee80211_eht_operation))
eht_oper = (void *)(eht_oper_ie + 3);
else
eht_oper = NULL;
}
/* Allow VHT if at least one channel on the sband supports 80 MHz */
have_80mhz = false;
for (i = 0; i < sband->n_channels; i++) {
if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
IEEE80211_CHAN_NO_80MHZ))
continue;
have_80mhz = true;
break;
}
if (!have_80mhz) {
sdata_info(sdata, "80 MHz not supported, disabling VHT\n");
*conn_flags |= IEEE80211_CONN_DISABLE_VHT;
}
if (sband->band == NL80211_BAND_S1GHZ) {
s1g_oper = elems->s1g_oper;
if (!s1g_oper)
sdata_info(sdata,
"AP missing S1G operation element?\n");
}
*conn_flags |=
ieee80211_determine_chantype(sdata, link, *conn_flags,
sband,
cbss->channel,
bss->vht_cap_info,
ht_oper, vht_oper,
he_oper, eht_oper,
s1g_oper,
&chandef, false);
if (link)
link->needed_rx_chains =
min(ieee80211_max_rx_chains(link, cbss),
local->rx_chains);
rcu_read_unlock();
/* the element data was RCU protected so no longer valid anyway */
kfree(elems);
elems = NULL;
if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) {
sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
return -EINVAL;
}
if (!link)
return 0;
/* will change later if needed */
link->smps_mode = IEEE80211_SMPS_OFF;
mutex_lock(&local->mtx);
/*
* If this fails (possibly due to channel context sharing
* on incompatible channels, e.g. 80+80 and 160 sharing the
* same control channel) try to use a smaller bandwidth.
*/
ret = ieee80211_link_use_channel(link, &chandef,
IEEE80211_CHANCTX_SHARED);
/* don't downgrade for 5 and 10 MHz channels, though. */
if (chandef.width == NL80211_CHAN_WIDTH_5 ||
chandef.width == NL80211_CHAN_WIDTH_10)
goto out;
while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
*conn_flags |=
ieee80211_chandef_downgrade(&chandef);
ret = ieee80211_link_use_channel(link, &chandef,
IEEE80211_CHANCTX_SHARED);
}
out:
mutex_unlock(&local->mtx);
return ret;
}
static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
u8 *dtim_count, u8 *dtim_period)
{
const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
ies->len);
const struct ieee80211_tim_ie *tim = NULL;
const struct ieee80211_bssid_index *idx;
bool valid = tim_ie && tim_ie[1] >= 2;
if (valid)
tim = (void *)(tim_ie + 2);
if (dtim_count)
*dtim_count = valid ? tim->dtim_count : 0;
if (dtim_period)
*dtim_period = valid ? tim->dtim_period : 0;
/* Check if value is overridden by non-transmitted profile */
if (!idx_ie || idx_ie[1] < 3)
return valid;
idx = (void *)(idx_ie + 2);
if (dtim_count)
*dtim_count = idx->dtim_count;
if (dtim_period)
*dtim_period = idx->dtim_period;
return true;
}
static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt,
struct ieee802_11_elems *elems,
const u8 *elem_start, unsigned int elem_len)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
struct ieee80211_local *local = sdata->local;
unsigned int link_id;
struct sta_info *sta;
u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {};
int err;
mutex_lock(&sdata->local->sta_mtx);
/*
* station info was already allocated and inserted before
* the association and should be available to us
*/
sta = sta_info_get(sdata, assoc_data->ap_addr);
if (WARN_ON(!sta))
goto out_err;
if (sdata->vif.valid_links) {
u16 valid_links = 0;
for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
if (!assoc_data->link[link_id].bss)
continue;
valid_links |= BIT(link_id);
if (link_id != assoc_data->assoc_link_id) {
err = ieee80211_sta_allocate_link(sta, link_id);
if (err)
goto out_err;
}
}
ieee80211_vif_set_links(sdata, valid_links);
}
for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
struct ieee80211_link_data *link;
struct link_sta_info *link_sta;
if (!assoc_data->link[link_id].bss)
continue;
link = sdata_dereference(sdata->link[link_id], sdata);
if (WARN_ON(!link))
goto out_err;
if (sdata->vif.valid_links)
link_info(link,
"local address %pM, AP link address %pM\n",
link->conf->addr,
assoc_data->link[link_id].bss->bssid);
link_sta = rcu_dereference_protected(sta->link[link_id],
lockdep_is_held(&local->sta_mtx));
if (WARN_ON(!link_sta))
goto out_err;
if (link_id != assoc_data->assoc_link_id) {
struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
const struct cfg80211_bss_ies *ies;
rcu_read_lock();
ies = rcu_dereference(cbss->ies);
ieee80211_get_dtim(ies,
&link->conf->sync_dtim_count,
&link->u.mgd.dtim_period);
link->conf->dtim_period = link->u.mgd.dtim_period ?: 1;
link->conf->beacon_int = cbss->beacon_interval;
rcu_read_unlock();
err = ieee80211_prep_channel(sdata, link, cbss,
&link->u.mgd.conn_flags);
if (err) {
link_info(link, "prep_channel failed\n");
goto out_err;
}
}
err = ieee80211_mgd_setup_link_sta(link, sta, link_sta,
assoc_data->link[link_id].bss);
if (err)
goto out_err;
if (!ieee80211_assoc_config_link(link, link_sta,
assoc_data->link[link_id].bss,
mgmt, elem_start, elem_len,
&changed[link_id]))
goto out_err;
if (link_id != assoc_data->assoc_link_id) {
err = ieee80211_sta_activate_link(sta, link_id);
if (err)
goto out_err;
}
}
rate_control_rate_init(sta);
if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
set_sta_flag(sta, WLAN_STA_MFP);
sta->sta.mfp = true;
} else {
sta->sta.mfp = false;
}
ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab,
elems->ext_capab_len);
sta->sta.wme = (elems->wmm_param || elems->s1g_capab) &&
local->hw.queues >= IEEE80211_NUM_ACS;
err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
if (err) {
sdata_info(sdata,
"failed to move station %pM to desired state\n",
sta->sta.addr);
WARN_ON(__sta_info_destroy(sta));
goto out_err;
}
if (sdata->wdev.use_4addr)
drv_sta_set_4addr(local, sdata, &sta->sta, true);
mutex_unlock(&sdata->local->sta_mtx);
ieee80211_set_associated(sdata, assoc_data, changed);
/*
* If we're using 4-addr mode, let the AP know that we're
* doing so, so that it can create the STA VLAN on its side
*/
if (ifmgd->use_4addr)
ieee80211_send_4addr_nullfunc(local, sdata);
/*
* Start timer to probe the connection to the AP now.
* Also start the timer that will detect beacon loss.
*/
ieee80211_sta_reset_beacon_monitor(sdata);
ieee80211_sta_reset_conn_monitor(sdata);
return true;
out_err:
eth_zero_addr(sdata->vif.cfg.ap_addr);
mutex_unlock(&sdata->local->sta_mtx);
return false;
}
static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt,
size_t len)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
u16 capab_info, status_code, aid;
struct ieee80211_elems_parse_params parse_params = {
.bss = NULL,
.link_id = -1,
.from_ap = true,
};
struct ieee802_11_elems *elems;
int ac;
const u8 *elem_start;
unsigned int elem_len;
bool reassoc;
struct ieee80211_event event = {
.type = MLME_EVENT,
.u.mlme.data = ASSOC_EVENT,
};
struct ieee80211_prep_tx_info info = {};
struct cfg80211_rx_assoc_resp resp = {
.uapsd_queues = -1,
};
u8 ap_mld_addr[ETH_ALEN] __aligned(2);
unsigned int link_id;
sdata_assert_lock(sdata);
if (!assoc_data)
return;
if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) ||
!ether_addr_equal(assoc_data->ap_addr, mgmt->sa))
return;
/*
* AssocResp and ReassocResp have identical structure, so process both
* of them in this function.
*/
if (len < 24 + 6)
return;
reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
if (assoc_data->s1g)
elem_start = mgmt->u.s1g_assoc_resp.variable;
else
elem_start = mgmt->u.assoc_resp.variable;
/*
* Note: this may not be perfect, AP might misbehave - if
* anyone needs to rely on perfect complete notification
* with the exact right subtype, then we need to track what
* we actually transmitted.
*/
info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ :
IEEE80211_STYPE_ASSOC_REQ;
if (assoc_data->fils_kek_len &&
fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
return;
elem_len = len - (elem_start - (u8 *)mgmt);
parse_params.start = elem_start;
parse_params.len = elem_len;
elems = ieee802_11_parse_elems_full(&parse_params);
if (!elems)
goto notify_driver;
if (elems->aid_resp)
aid = le16_to_cpu(elems->aid_resp->aid);
else if (assoc_data->s1g)
aid = 0; /* TODO */
else
aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
/*
* The 5 MSB of the AID field are reserved
* (802.11-2016 9.4.1.8 AID field)
*/
aid &= 0x7ff;
sdata_info(sdata,
"RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
reassoc ? "Rea" : "A", assoc_data->ap_addr,
capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
ifmgd->broken_ap = false;
if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
elems->timeout_int &&
elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
u32 tu, ms;
cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr,
le32_to_cpu(elems->timeout_int->value));
tu = le32_to_cpu(elems->timeout_int->value);
ms = tu * 1024 / 1000;
sdata_info(sdata,
"%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
assoc_data->ap_addr, tu, ms);
assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
assoc_data->timeout_started = true;
if (ms > IEEE80211_ASSOC_TIMEOUT)
run_again(sdata, assoc_data->timeout);
goto notify_driver;
}
if (status_code != WLAN_STATUS_SUCCESS) {
sdata_info(sdata, "%pM denied association (code=%d)\n",
assoc_data->ap_addr, status_code);
event.u.mlme.status = MLME_DENIED;
event.u.mlme.reason = status_code;
drv_event_callback(sdata->local, sdata, &event);
} else {
if (aid == 0 || aid > IEEE80211_MAX_AID) {
sdata_info(sdata,
"invalid AID value %d (out of range), turn off PS\n",
aid);
aid = 0;
ifmgd->broken_ap = true;
}
if (sdata->vif.valid_links) {
if (!elems->multi_link) {
sdata_info(sdata,
"MLO association with %pM but no multi-link element in response!\n",
assoc_data->ap_addr);
goto abandon_assoc;
}
if (le16_get_bits(elems->multi_link->control,
IEEE80211_ML_CONTROL_TYPE) !=
IEEE80211_ML_CONTROL_TYPE_BASIC) {
sdata_info(sdata,
"bad multi-link element (control=0x%x)\n",
le16_to_cpu(elems->multi_link->control));
goto abandon_assoc;
} else {
struct ieee80211_mle_basic_common_info *common;
common = (void *)elems->multi_link->variable;
if (memcmp(assoc_data->ap_addr,
common->mld_mac_addr, ETH_ALEN)) {
sdata_info(sdata,
"AP MLD MAC address mismatch: got %pM expected %pM\n",
common->mld_mac_addr,
assoc_data->ap_addr);
goto abandon_assoc;
}
}
}
sdata->vif.cfg.aid = aid;
if (!ieee80211_assoc_success(sdata, mgmt, elems,
elem_start, elem_len)) {
/* oops -- internal error -- send timeout for now */
ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
goto notify_driver;
}
event.u.mlme.status = MLME_SUCCESS;
drv_event_callback(sdata->local, sdata, &event);
sdata_info(sdata, "associated\n");
info.success = 1;
}
for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
struct ieee80211_link_data *link;
link = sdata_dereference(sdata->link[link_id], sdata);
if (!link)
continue;
if (!assoc_data->link[link_id].bss)
continue;
resp.links[link_id].bss = assoc_data->link[link_id].bss;
resp.links[link_id].addr = link->conf->addr;
/* get uapsd queues configuration - same for all links */
resp.uapsd_queues = 0;
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
if (link->tx_conf[ac].uapsd)
resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
}
if (sdata->vif.valid_links) {
ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr);
resp.ap_mld_addr = ap_mld_addr;
}
ieee80211_destroy_assoc_data(sdata,
status_code == WLAN_STATUS_SUCCESS ?
ASSOC_SUCCESS :
ASSOC_REJECTED);
resp.buf = (u8 *)mgmt;
resp.len = len;
resp.req_ies = ifmgd->assoc_req_ies;
resp.req_ies_len = ifmgd->assoc_req_ies_len;
cfg80211_rx_assoc_resp(sdata->dev, &resp);
notify_driver:
drv_mgd_complete_tx(sdata->local, sdata, &info);
kfree(elems);
return;
abandon_assoc:
ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
goto notify_driver;
}
static void ieee80211_rx_bss_info(struct ieee80211_link_data *link,
struct ieee80211_mgmt *mgmt, size_t len,
struct ieee80211_rx_status *rx_status)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
struct ieee80211_bss *bss;
struct ieee80211_channel *channel;
sdata_assert_lock(sdata);
channel = ieee80211_get_channel_khz(local->hw.wiphy,
ieee80211_rx_status_to_khz(rx_status));
if (!channel)
return;
bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
if (bss) {
link->conf->beacon_rate = bss->beacon_rate;
ieee80211_rx_bss_put(local, bss);
}
}
static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link,
struct sk_buff *skb)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_mgmt *mgmt = (void *)skb->data;
struct ieee80211_if_managed *ifmgd;
struct ieee80211_rx_status *rx_status = (void *) skb->cb;
struct ieee80211_channel *channel;
size_t baselen, len = skb->len;
ifmgd = &sdata->u.mgd;
sdata_assert_lock(sdata);
/*
* According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
* "If a 6 GHz AP receives a Probe Request frame and responds with
* a Probe Response frame [..], the Address 1 field of the Probe
* Response frame shall be set to the broadcast address [..]"
* So, on 6GHz band we should also accept broadcast responses.
*/
channel = ieee80211_get_channel(sdata->local->hw.wiphy,
rx_status->freq);
if (!channel)
return;
if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
(channel->band != NL80211_BAND_6GHZ ||
!is_broadcast_ether_addr(mgmt->da)))
return; /* ignore ProbeResp to foreign address */
baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
if (baselen > len)
return;
ieee80211_rx_bss_info(link, mgmt, len, rx_status);
if (ifmgd->associated &&
ether_addr_equal(mgmt->bssid, link->u.mgd.bssid))
ieee80211_reset_ap_probe(sdata);
}
/*
* This is the canonical list of information elements we care about,
* the filter code also gives us all changes to the Microsoft OUI
* (00:50:F2) vendor IE which is used for WMM which we need to track,
* as well as the DTPC IE (part of the Cisco OUI) used for signaling
* changes to requested client power.
*
* We implement beacon filtering in software since that means we can
* avoid processing the frame here and in cfg80211, and userspace
* will not be able to tell whether the hardware supports it or not.
*
* XXX: This list needs to be dynamic -- userspace needs to be able to
* add items it requires. It also needs to be able to tell us to
* look out for other vendor IEs.
*/
static const u64 care_about_ies =
(1ULL << WLAN_EID_COUNTRY) |
(1ULL << WLAN_EID_ERP_INFO) |
(1ULL << WLAN_EID_CHANNEL_SWITCH) |
(1ULL << WLAN_EID_PWR_CONSTRAINT) |
(1ULL << WLAN_EID_HT_CAPABILITY) |
(1ULL << WLAN_EID_HT_OPERATION) |
(1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link,
struct ieee80211_if_managed *ifmgd,
struct ieee80211_bss_conf *bss_conf,
struct ieee80211_local *local,
struct ieee80211_rx_status *rx_status)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
/* Track average RSSI from the Beacon frames of the current AP */
if (!link->u.mgd.tracking_signal_avg) {
link->u.mgd.tracking_signal_avg = true;
ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal);
link->u.mgd.last_cqm_event_signal = 0;
link->u.mgd.count_beacon_signal = 1;
link->u.mgd.last_ave_beacon_signal = 0;
} else {
link->u.mgd.count_beacon_signal++;
}
ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal,
-rx_status->signal);
if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
int last_sig = link->u.mgd.last_ave_beacon_signal;
struct ieee80211_event event = {
.type = RSSI_EVENT,
};
/*
* if signal crosses either of the boundaries, invoke callback
* with appropriate parameters
*/
if (sig > ifmgd->rssi_max_thold &&
(last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
link->u.mgd.last_ave_beacon_signal = sig;
event.u.rssi.data = RSSI_EVENT_HIGH;
drv_event_callback(local, sdata, &event);
} else if (sig < ifmgd->rssi_min_thold &&
(last_sig >= ifmgd->rssi_max_thold ||
last_sig == 0)) {
link->u.mgd.last_ave_beacon_signal = sig;
event.u.rssi.data = RSSI_EVENT_LOW;
drv_event_callback(local, sdata, &event);
}
}
if (bss_conf->cqm_rssi_thold &&
link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
!(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
int last_event = link->u.mgd.last_cqm_event_signal;
int thold = bss_conf->cqm_rssi_thold;
int hyst = bss_conf->cqm_rssi_hyst;
if (sig < thold &&
(last_event == 0 || sig < last_event - hyst)) {
link->u.mgd.last_cqm_event_signal = sig;
ieee80211_cqm_rssi_notify(
&sdata->vif,
NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
sig, GFP_KERNEL);
} else if (sig > thold &&
(last_event == 0 || sig > last_event + hyst)) {
link->u.mgd.last_cqm_event_signal = sig;
ieee80211_cqm_rssi_notify(
&sdata->vif,
NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
sig, GFP_KERNEL);
}
}
if (bss_conf->cqm_rssi_low &&
link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
int last_event = link->u.mgd.last_cqm_event_signal;
int low = bss_conf->cqm_rssi_low;
int high = bss_conf->cqm_rssi_high;
if (sig < low &&
(last_event == 0 || last_event >= low)) {
link->u.mgd.last_cqm_event_signal = sig;
ieee80211_cqm_rssi_notify(
&sdata->vif,
NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
sig, GFP_KERNEL);
} else if (sig > high &&
(last_event == 0 || last_event <= high)) {
link->u.mgd.last_cqm_event_signal = sig;
ieee80211_cqm_rssi_notify(
&sdata->vif,
NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
sig, GFP_KERNEL);
}
}
}
static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
struct cfg80211_bss *bss)
{
if (ether_addr_equal(tx_bssid, bss->bssid))
return true;
if (!bss->transmitted_bss)
return false;
return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
}
static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
struct ieee80211_hdr *hdr, size_t len,
struct ieee80211_rx_status *rx_status)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
struct ieee80211_mgmt *mgmt = (void *) hdr;
size_t baselen;
struct ieee802_11_elems *elems;
struct ieee80211_local *local = sdata->local;
struct ieee80211_chanctx_conf *chanctx_conf;
struct ieee80211_channel *chan;
struct link_sta_info *link_sta;
struct sta_info *sta;
u32 changed = 0;
bool erp_valid;
u8 erp_value = 0;
u32 ncrc = 0;
u8 *bssid, *variable = mgmt->u.beacon.variable;
u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
struct ieee80211_elems_parse_params parse_params = {
.link_id = -1,
.from_ap = true,
};
sdata_assert_lock(sdata);
/* Process beacon from the current BSS */
bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type);
if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
struct ieee80211_ext *ext = (void *) mgmt;
if (ieee80211_is_s1g_short_beacon(ext->frame_control))
variable = ext->u.s1g_short_beacon.variable;
else
variable = ext->u.s1g_beacon.variable;
}
baselen = (u8 *) variable - (u8 *) mgmt;
if (baselen > len)
return;
parse_params.start = variable;
parse_params.len = len - baselen;
rcu_read_lock();
chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
if (!chanctx_conf) {
rcu_read_unlock();
return;
}
if (ieee80211_rx_status_to_khz(rx_status) !=
ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
rcu_read_unlock();
return;
}
chan = chanctx_conf->def.chan;
rcu_read_unlock();
if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
!WARN_ON(sdata->vif.valid_links) &&
ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) {
parse_params.bss = ifmgd->assoc_data->link[0].bss;
elems = ieee802_11_parse_elems_full(&parse_params);
if (!elems)
return;
ieee80211_rx_bss_info(link, mgmt, len, rx_status);
if (elems->dtim_period)
link->u.mgd.dtim_period = elems->dtim_period;
link->u.mgd.have_beacon = true;
ifmgd->assoc_data->need_beacon = false;
if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
link->conf->sync_tsf =
le64_to_cpu(mgmt->u.beacon.timestamp);
link->conf->sync_device_ts =
rx_status->device_timestamp;
link->conf->sync_dtim_count = elems->dtim_count;
}
if (elems->mbssid_config_ie)
bss_conf->profile_periodicity =
elems->mbssid_config_ie->profile_periodicity;
else
bss_conf->profile_periodicity = 0;
if (elems->ext_capab_len >= 11 &&
(elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
bss_conf->ema_ap = true;
else
bss_conf->ema_ap = false;
/* continue assoc process */
ifmgd->assoc_data->timeout = jiffies;
ifmgd->assoc_data->timeout_started = true;
run_again(sdata, ifmgd->assoc_data->timeout);
kfree(elems);
return;
}
if (!ifmgd->associated ||
!ieee80211_rx_our_beacon(bssid, link->u.mgd.bss))
return;
bssid = link->u.mgd.bssid;
if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
ieee80211_handle_beacon_sig(link, ifmgd, bss_conf,
local, rx_status);
if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
mlme_dbg_ratelimited(sdata,
"cancelling AP probe due to a received beacon\n");
ieee80211_reset_ap_probe(sdata);
}
/*
* Push the beacon loss detection into the future since
* we are processing a beacon from the AP just now.
*/
ieee80211_sta_reset_beacon_monitor(sdata);
/* TODO: CRC urrently not calculated on S1G Beacon Compatibility
* element (which carries the beacon interval). Don't forget to add a
* bit to care_about_ies[] above if mac80211 is interested in a
* changing S1G element.
*/
if (!ieee80211_is_s1g_beacon(hdr->frame_control))
ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
parse_params.bss = link->u.mgd.bss;
parse_params.filter = care_about_ies;
parse_params.crc = ncrc;
elems = ieee802_11_parse_elems_full(&parse_params);
if (!elems)
return;
ncrc = elems->crc;
if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) {
if (local->hw.conf.dynamic_ps_timeout > 0) {
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
ieee80211_hw_config(local,
IEEE80211_CONF_CHANGE_PS);
}
ieee80211_send_nullfunc(local, sdata, false);
} else if (!local->pspolling && sdata->u.mgd.powersave) {
local->pspolling = true;
/*
* Here is assumed that the driver will be
* able to send ps-poll frame and receive a
* response even though power save mode is
* enabled, but some drivers might require
* to disable power save here. This needs
* to be investigated.
*/
ieee80211_send_pspoll(local, sdata);
}
}
if (sdata->vif.p2p ||
sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
struct ieee80211_p2p_noa_attr noa = {};
int ret;
ret = cfg80211_get_p2p_attr(variable,
len - baselen,
IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
(u8 *) &noa, sizeof(noa));
if (ret >= 2) {
if (link->u.mgd.p2p_noa_index != noa.index) {
/* valid noa_attr and index changed */
link->u.mgd.p2p_noa_index = noa.index;
memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
changed |= BSS_CHANGED_P2P_PS;
/*
* make sure we update all information, the CRC
* mechanism doesn't look at P2P attributes.
*/
link->u.mgd.beacon_crc_valid = false;
}
} else if (link->u.mgd.p2p_noa_index != -1) {
/* noa_attr not found and we had valid noa_attr before */
link->u.mgd.p2p_noa_index = -1;
memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
changed |= BSS_CHANGED_P2P_PS;
link->u.mgd.beacon_crc_valid = false;
}
}
if (link->u.mgd.csa_waiting_bcn)
ieee80211_chswitch_post_beacon(link);
/*
* Update beacon timing and dtim count on every beacon appearance. This
* will allow the driver to use the most updated values. Do it before
* comparing this one with last received beacon.
* IMPORTANT: These parameters would possibly be out of sync by the time
* the driver will use them. The synchronized view is currently
* guaranteed only in certain callbacks.
*/
if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
!ieee80211_is_s1g_beacon(hdr->frame_control)) {
link->conf->sync_tsf =
le64_to_cpu(mgmt->u.beacon.timestamp);
link->conf->sync_device_ts =
rx_status->device_timestamp;
link->conf->sync_dtim_count = elems->dtim_count;
}
if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) ||
ieee80211_is_s1g_short_beacon(mgmt->frame_control))
goto free;
link->u.mgd.beacon_crc = ncrc;
link->u.mgd.beacon_crc_valid = true;
ieee80211_rx_bss_info(link, mgmt, len, rx_status);
ieee80211_sta_process_chanswitch(link, rx_status->mactime,
rx_status->device_timestamp,
elems, true);
if (!link->u.mgd.disable_wmm_tracking &&
ieee80211_sta_wmm_params(local, link, elems->wmm_param,
elems->wmm_param_len,
elems->mu_edca_param_set))
changed |= BSS_CHANGED_QOS;
/*
* If we haven't had a beacon before, tell the driver about the
* DTIM period (and beacon timing if desired) now.
*/
if (!link->u.mgd.have_beacon) {
/* a few bogus AP send dtim_period = 0 or no TIM IE */
bss_conf->dtim_period = elems->dtim_period ?: 1;
changed |= BSS_CHANGED_BEACON_INFO;
link->u.mgd.have_beacon = true;
mutex_lock(&local->iflist_mtx);
ieee80211_recalc_ps(local);
mutex_unlock(&local->iflist_mtx);
ieee80211_recalc_ps_vif(sdata);
}
if (elems->erp_info) {
erp_valid = true;
erp_value = elems->erp_info[0];
} else {
erp_valid = false;
}
if (!ieee80211_is_s1g_beacon(hdr->frame_control))
changed |= ieee80211_handle_bss_capability(link,
le16_to_cpu(mgmt->u.beacon.capab_info),
erp_valid, erp_value);
mutex_lock(&local->sta_mtx);
sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
if (WARN_ON(!sta)) {
mutex_unlock(&local->sta_mtx);
goto free;
}
link_sta = rcu_dereference_protected(sta->link[link->link_id],
lockdep_is_held(&local->sta_mtx));
if (WARN_ON(!link_sta)) {
mutex_unlock(&local->sta_mtx);
goto free;
}
changed |= ieee80211_recalc_twt_req(link, link_sta, elems);
if (ieee80211_config_bw(link, elems->ht_cap_elem,
elems->vht_cap_elem, elems->ht_operation,
elems->vht_operation, elems->he_operation,
elems->eht_operation,
elems->s1g_oper, bssid, &changed)) {
mutex_unlock(&local->sta_mtx);
sdata_info(sdata,
"failed to follow AP %pM bandwidth change, disconnect\n",
bssid);
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;
}
if (sta && elems->opmode_notif)
ieee80211_vht_handle_opmode(sdata, link_sta,
*elems->opmode_notif,
rx_status->band);
mutex_unlock(&local->sta_mtx);
changed |= ieee80211_handle_pwr_constr(link, chan, mgmt,
elems->country_elem,
elems->country_elem_len,
elems->pwr_constr_elem,
elems->cisco_dtpc_elem);
ieee80211_link_info_change_notify(sdata, link, changed);
free:
kfree(elems);
}
void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb)
{
struct ieee80211_link_data *link = &sdata->deflink;
struct ieee80211_rx_status *rx_status;
struct ieee80211_hdr *hdr;
u16 fc;
rx_status = (struct ieee80211_rx_status *) skb->cb;
hdr = (struct ieee80211_hdr *) skb->data;
fc = le16_to_cpu(hdr->frame_control);
sdata_lock(sdata);
switch (fc & IEEE80211_FCTL_STYPE) {
case IEEE80211_STYPE_S1G_BEACON:
ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status);
break;
}
sdata_unlock(sdata);
}
void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb)
{
struct ieee80211_link_data *link = &sdata->deflink;
struct ieee80211_rx_status *rx_status;
struct ieee80211_mgmt *mgmt;
u16 fc;
int ies_len;
rx_status = (struct ieee80211_rx_status *) skb->cb;
mgmt = (struct ieee80211_mgmt *) skb->data;
fc = le16_to_cpu(mgmt->frame_control);
sdata_lock(sdata);
if (rx_status->link_valid) {
link = sdata_dereference(sdata->link[rx_status->link_id],
sdata);
if (!link)
goto out;
}
switch (fc & IEEE80211_FCTL_STYPE) {
case IEEE80211_STYPE_BEACON:
ieee80211_rx_mgmt_beacon(link, (void *)mgmt,
skb->len, rx_status);
break;
case IEEE80211_STYPE_PROBE_RESP:
ieee80211_rx_mgmt_probe_resp(link, skb);
break;
case IEEE80211_STYPE_AUTH:
ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
break;
case IEEE80211_STYPE_DEAUTH:
ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
break;
case IEEE80211_STYPE_DISASSOC:
ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
break;
case IEEE80211_STYPE_ASSOC_RESP:
case IEEE80211_STYPE_REASSOC_RESP:
ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
break;
case IEEE80211_STYPE_ACTION:
if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
struct ieee802_11_elems *elems;
ies_len = skb->len -
offsetof(struct ieee80211_mgmt,
u.action.u.chan_switch.variable);
if (ies_len < 0)
break;
/* CSA IE cannot be overridden, no need for BSSID */
elems = ieee802_11_parse_elems(
mgmt->u.action.u.chan_switch.variable,
ies_len, true, NULL);
if (elems && !elems->parse_error)
ieee80211_sta_process_chanswitch(link,
rx_status->mactime,
rx_status->device_timestamp,
elems, false);
kfree(elems);
} else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
struct ieee802_11_elems *elems;
ies_len = skb->len -
offsetof(struct ieee80211_mgmt,
u.action.u.ext_chan_switch.variable);
if (ies_len < 0)
break;
/*
* extended CSA IE can't be overridden, no need for
* BSSID
*/
elems = ieee802_11_parse_elems(
mgmt->u.action.u.ext_chan_switch.variable,
ies_len, true, NULL);
if (elems && !elems->parse_error) {
/* for the handling code pretend it was an IE */
elems->ext_chansw_ie =
&mgmt->u.action.u.ext_chan_switch.data;
ieee80211_sta_process_chanswitch(link,
rx_status->mactime,
rx_status->device_timestamp,
elems, false);
}
kfree(elems);
}
break;
}
out:
sdata_unlock(sdata);
}
static void ieee80211_sta_timer(struct timer_list *t)
{
struct ieee80211_sub_if_data *sdata =
from_timer(sdata, t, u.mgd.timer);
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
}
void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
u8 reason, bool tx)
{
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
tx, frame_buf);
ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
reason, false);
}
static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
u32 tx_flags = 0;
u16 trans = 1;
u16 status = 0;
struct ieee80211_prep_tx_info info = {
.subtype = IEEE80211_STYPE_AUTH,
};
sdata_assert_lock(sdata);
if (WARN_ON_ONCE(!auth_data))
return -EINVAL;
auth_data->tries++;
if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
sdata_info(sdata, "authentication with %pM timed out\n",
auth_data->ap_addr);
/*
* Most likely AP is not in the range so remove the
* bss struct for that AP.
*/
cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
return -ETIMEDOUT;
}
if (auth_data->algorithm == WLAN_AUTH_SAE)
info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
drv_mgd_prepare_tx(local, sdata, &info);
sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
auth_data->ap_addr, auth_data->tries,
IEEE80211_AUTH_MAX_TRIES);
auth_data->expected_transaction = 2;
if (auth_data->algorithm == WLAN_AUTH_SAE) {
trans = auth_data->sae_trans;
status = auth_data->sae_status;
auth_data->expected_transaction = trans;
}
if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
IEEE80211_TX_INTFL_MLME_CONN_TX;
ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
auth_data->data, auth_data->data_len,
auth_data->ap_addr, auth_data->ap_addr,
NULL, 0, 0, tx_flags);
if (tx_flags == 0) {
if (auth_data->algorithm == WLAN_AUTH_SAE)
auth_data->timeout = jiffies +
IEEE80211_AUTH_TIMEOUT_SAE;
else
auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
} else {
auth_data->timeout =
round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
}
auth_data->timeout_started = true;
run_again(sdata, auth_data->timeout);
return 0;
}
static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
struct ieee80211_local *local = sdata->local;
int ret;
sdata_assert_lock(sdata);
assoc_data->tries++;
if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
sdata_info(sdata, "association with %pM timed out\n",
assoc_data->ap_addr);
/*
* Most likely AP is not in the range so remove the
* bss struct for that AP.
*/
cfg80211_unlink_bss(local->hw.wiphy,
assoc_data->link[assoc_data->assoc_link_id].bss);
return -ETIMEDOUT;
}
sdata_info(sdata, "associate with %pM (try %d/%d)\n",
assoc_data->ap_addr, assoc_data->tries,
IEEE80211_ASSOC_MAX_TRIES);
ret = ieee80211_send_assoc(sdata);
if (ret)
return ret;
if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
assoc_data->timeout_started = true;
run_again(sdata, assoc_data->timeout);
} else {
assoc_data->timeout =
round_jiffies_up(jiffies +
IEEE80211_ASSOC_TIMEOUT_LONG);
assoc_data->timeout_started = true;
run_again(sdata, assoc_data->timeout);
}
return 0;
}
void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
__le16 fc, bool acked)
{
struct ieee80211_local *local = sdata->local;
sdata->u.mgd.status_fc = fc;
sdata->u.mgd.status_acked = acked;
sdata->u.mgd.status_received = true;
ieee80211_queue_work(&local->hw, &sdata->work);
}
void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
sdata_lock(sdata);
if (ifmgd->status_received) {
__le16 fc = ifmgd->status_fc;
bool status_acked = ifmgd->status_acked;
ifmgd->status_received = false;
if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
if (status_acked) {
if (ifmgd->auth_data->algorithm ==
WLAN_AUTH_SAE)
ifmgd->auth_data->timeout =
jiffies +
IEEE80211_AUTH_TIMEOUT_SAE;
else
ifmgd->auth_data->timeout =
jiffies +
IEEE80211_AUTH_TIMEOUT_SHORT;
run_again(sdata, ifmgd->auth_data->timeout);
} else {
ifmgd->auth_data->timeout = jiffies - 1;
}
ifmgd->auth_data->timeout_started = true;
} else if (ifmgd->assoc_data &&
(ieee80211_is_assoc_req(fc) ||
ieee80211_is_reassoc_req(fc))) {
if (status_acked) {
ifmgd->assoc_data->timeout =
jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
run_again(sdata, ifmgd->assoc_data->timeout);
} else {
ifmgd->assoc_data->timeout = jiffies - 1;
}
ifmgd->assoc_data->timeout_started = true;
}
}
if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
time_after(jiffies, ifmgd->auth_data->timeout)) {
if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) {
/*
* ok ... we waited for assoc or continuation but
* userspace didn't do it, so kill the auth data
*/
ieee80211_destroy_auth_data(sdata, false);
} else if (ieee80211_auth(sdata)) {
u8 ap_addr[ETH_ALEN];
struct ieee80211_event event = {
.type = MLME_EVENT,
.u.mlme.data = AUTH_EVENT,
.u.mlme.status = MLME_TIMEOUT,
};
memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN);
ieee80211_destroy_auth_data(sdata, false);
cfg80211_auth_timeout(sdata->dev, ap_addr);
drv_event_callback(sdata->local, sdata, &event);
}
} else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
run_again(sdata, ifmgd->auth_data->timeout);
if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
time_after(jiffies, ifmgd->assoc_data->timeout)) {
if ((ifmgd->assoc_data->need_beacon &&
!sdata->deflink.u.mgd.have_beacon) ||
ieee80211_do_assoc(sdata)) {
struct ieee80211_event event = {
.type = MLME_EVENT,
.u.mlme.data = ASSOC_EVENT,
.u.mlme.status = MLME_TIMEOUT,
};
ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
drv_event_callback(sdata->local, sdata, &event);
}
} else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
run_again(sdata, ifmgd->assoc_data->timeout);
if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
ifmgd->associated) {
u8 *bssid = sdata->deflink.u.mgd.bssid;
int max_tries;
if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
max_tries = max_nullfunc_tries;
else
max_tries = max_probe_tries;
/* ACK received for nullfunc probing frame */
if (!ifmgd->probe_send_count)
ieee80211_reset_ap_probe(sdata);
else if (ifmgd->nullfunc_failed) {
if (ifmgd->probe_send_count < max_tries) {
mlme_dbg(sdata,
"No ack for nullfunc frame to AP %pM, try %d/%i\n",
bssid, ifmgd->probe_send_count,
max_tries);
ieee80211_mgd_probe_ap_send(sdata);
} else {
mlme_dbg(sdata,
"No ack for nullfunc frame to AP %pM, disconnecting.\n",
bssid);
ieee80211_sta_connection_lost(sdata,
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
false);
}
} else if (time_is_after_jiffies(ifmgd->probe_timeout))
run_again(sdata, ifmgd->probe_timeout);
else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
mlme_dbg(sdata,
"Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
bssid, probe_wait_ms);
ieee80211_sta_connection_lost(sdata,
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
} else if (ifmgd->probe_send_count < max_tries) {
mlme_dbg(sdata,
"No probe response from AP %pM after %dms, try %d/%i\n",
bssid, probe_wait_ms,
ifmgd->probe_send_count, max_tries);
ieee80211_mgd_probe_ap_send(sdata);
} else {
/*
* We actually lost the connection ... or did we?
* Let's make sure!
*/
mlme_dbg(sdata,
"No probe response from AP %pM after %dms, disconnecting.\n",
bssid, probe_wait_ms);
ieee80211_sta_connection_lost(sdata,
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
}
}
sdata_unlock(sdata);
}
static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
{
struct ieee80211_sub_if_data *sdata =
from_timer(sdata, t, u.mgd.bcn_mon_timer);
if (WARN_ON(sdata->vif.valid_links))
return;
if (sdata->vif.bss_conf.csa_active &&
!sdata->deflink.u.mgd.csa_waiting_bcn)
return;
if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
return;
sdata->u.mgd.connection_loss = false;
ieee80211_queue_work(&sdata->local->hw,
&sdata->u.mgd.beacon_connection_loss_work);
}
static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
{
struct ieee80211_sub_if_data *sdata =
from_timer(sdata, t, u.mgd.conn_mon_timer);
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
unsigned long timeout;
if (WARN_ON(sdata->vif.valid_links))
return;
if (sdata->vif.bss_conf.csa_active &&
!sdata->deflink.u.mgd.csa_waiting_bcn)
return;
sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
if (!sta)
return;
timeout = sta->deflink.status_stats.last_ack;
if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx))
timeout = sta->deflink.rx_stats.last_rx;
timeout += IEEE80211_CONNECTION_IDLE_TIME;
/* If timeout is after now, then update timer to fire at
* the later date, but do not actually probe at this time.
*/
if (time_is_after_jiffies(timeout)) {
mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout));
return;
}
ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
}
static void ieee80211_sta_monitor_work(struct work_struct *work)
{
struct ieee80211_sub_if_data *sdata =
container_of(work, struct ieee80211_sub_if_data,
u.mgd.monitor_work);
ieee80211_mgd_probe_ap(sdata, false);
}
static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
{
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
__ieee80211_stop_poll(sdata);
/* let's probe the connection once */
if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
ieee80211_queue_work(&sdata->local->hw,
&sdata->u.mgd.monitor_work);
}
}
#ifdef CONFIG_PM
void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
sdata_lock(sdata);
if (ifmgd->auth_data || ifmgd->assoc_data) {
const u8 *ap_addr = ifmgd->auth_data ?
ifmgd->auth_data->ap_addr :
ifmgd->assoc_data->ap_addr;
/*
* If we are trying to authenticate / associate while suspending,
* cfg80211 won't know and won't actually abort those attempts,
* thus we need to do that ourselves.
*/
ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr,
IEEE80211_STYPE_DEAUTH,
WLAN_REASON_DEAUTH_LEAVING,
false, frame_buf);
if (ifmgd->assoc_data)
ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
if (ifmgd->auth_data)
ieee80211_destroy_auth_data(sdata, false);
cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
IEEE80211_DEAUTH_FRAME_LEN,
false);
}
/* This is a bit of a hack - we should find a better and more generic
* solution to this. Normally when suspending, cfg80211 will in fact
* deauthenticate. However, it doesn't (and cannot) stop an ongoing
* auth (not so important) or assoc (this is the problem) process.
*
* As a consequence, it can happen that we are in the process of both
* associating and suspending, and receive an association response
* after cfg80211 has checked if it needs to disconnect, but before
* we actually set the flag to drop incoming frames. This will then
* cause the workqueue flush to process the association response in
* the suspend, resulting in a successful association just before it
* tries to remove the interface from the driver, which now though
* has a channel context assigned ... this results in issues.
*
* To work around this (for now) simply deauth here again if we're
* now connected.
*/
if (ifmgd->associated && !sdata->local->wowlan) {
u8 bssid[ETH_ALEN];
struct cfg80211_deauth_request req = {
.reason_code = WLAN_REASON_DEAUTH_LEAVING,
.bssid = bssid,
};
memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
ieee80211_mgd_deauth(sdata, &req);
}
sdata_unlock(sdata);
}
#endif
void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
sdata_lock(sdata);
if (!ifmgd->associated) {
sdata_unlock(sdata);
return;
}
if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
mlme_dbg(sdata, "driver requested disconnect after resume\n");
ieee80211_sta_connection_lost(sdata,
WLAN_REASON_UNSPECIFIED,
true);
sdata_unlock(sdata);
return;
}
if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) {
sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART;
mlme_dbg(sdata, "driver requested disconnect after hardware restart\n");
ieee80211_sta_connection_lost(sdata,
WLAN_REASON_UNSPECIFIED,
true);
sdata_unlock(sdata);
return;
}
sdata_unlock(sdata);
}
static void ieee80211_request_smps_mgd_work(struct work_struct *work)
{
struct ieee80211_link_data *link =
container_of(work, struct ieee80211_link_data,
u.mgd.request_smps_work);
sdata_lock(link->sdata);
__ieee80211_request_smps_mgd(link->sdata, link,
link->u.mgd.driver_smps_mode);
sdata_unlock(link->sdata);
}
/* interface setup */
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
INIT_WORK(&ifmgd->beacon_connection_loss_work,
ieee80211_beacon_connection_loss_work);
INIT_WORK(&ifmgd->csa_connection_drop_work,
ieee80211_csa_connection_drop_work);
INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
ieee80211_tdls_peer_del_work);
timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
ieee80211_sta_handle_tspec_ac_params_wk);
ifmgd->flags = 0;
ifmgd->powersave = sdata->wdev.ps;
ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
/* Setup TDLS data */
spin_lock_init(&ifmgd->teardown_lock);
ifmgd->teardown_skb = NULL;
ifmgd->orig_teardown_skb = NULL;
}
void ieee80211_mgd_setup_link(struct ieee80211_link_data *link)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
unsigned int link_id = link->link_id;
link->u.mgd.p2p_noa_index = -1;
link->u.mgd.conn_flags = 0;
link->conf->bssid = link->u.mgd.bssid;
INIT_WORK(&link->u.mgd.request_smps_work,
ieee80211_request_smps_mgd_work);
if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC;
else
link->u.mgd.req_smps = IEEE80211_SMPS_OFF;
INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work);
timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0);
if (sdata->u.mgd.assoc_data)
ether_addr_copy(link->conf->addr,
sdata->u.mgd.assoc_data->link[link_id].addr);
else if (!is_valid_ether_addr(link->conf->addr))
eth_random_addr(link->conf->addr);
}
/* scan finished notification */
void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
{
struct ieee80211_sub_if_data *sdata;
/* Restart STA timers */
rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
if (ieee80211_sdata_running(sdata))
ieee80211_restart_sta_timer(sdata);
}
rcu_read_unlock();
}
static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
struct cfg80211_bss *cbss, s8 link_id,
const u8 *ap_mld_addr, bool assoc,
bool override)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_bss *bss = (void *)cbss->priv;
struct sta_info *new_sta = NULL;
struct ieee80211_link_data *link;
bool have_sta = false;
bool mlo;
int err;
if (link_id >= 0) {
mlo = true;
if (WARN_ON(!ap_mld_addr))
return -EINVAL;
err = ieee80211_vif_set_links(sdata, BIT(link_id));
} else {
if (WARN_ON(ap_mld_addr))
return -EINVAL;
ap_mld_addr = cbss->bssid;
err = ieee80211_vif_set_links(sdata, 0);
link_id = 0;
mlo = false;
}
if (err)
return err;
link = sdata_dereference(sdata->link[link_id], sdata);
if (WARN_ON(!link)) {
err = -ENOLINK;
goto out_err;
}
if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) {
err = -EINVAL;
goto out_err;
}
/* If a reconfig is happening, bail out */
if (local->in_reconfig) {
err = -EBUSY;
goto out_err;
}
if (assoc) {
rcu_read_lock();
have_sta = sta_info_get(sdata, ap_mld_addr);
rcu_read_unlock();
}
if (!have_sta) {
if (mlo)
new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr,
link_id, cbss->bssid,
GFP_KERNEL);
else
new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL);
if (!new_sta) {
err = -ENOMEM;
goto out_err;
}
new_sta->sta.mlo = mlo;
}
/*
* Set up the information for the new channel before setting the
* new channel. We can't - completely race-free - change the basic
* rates bitmap and the channel (sband) that it refers to, but if
* we set it up before we at least avoid calling into the driver's
* bss_info_changed() method with invalid information (since we do
* call that from changing the channel - only for IDLE and perhaps
* some others, but ...).
*
* So to avoid that, just set up all the new information before the
* channel, but tell the driver to apply it only afterwards, since
* it might need the new channel for that.
*/
if (new_sta) {
const struct cfg80211_bss_ies *ies;
struct link_sta_info *link_sta;
rcu_read_lock();
link_sta = rcu_dereference(new_sta->link[link_id]);
if (WARN_ON(!link_sta)) {
rcu_read_unlock();
sta_info_free(local, new_sta);
err = -EINVAL;
goto out_err;
}
err = ieee80211_mgd_setup_link_sta(link, new_sta,
link_sta, cbss);
if (err) {
rcu_read_unlock();
sta_info_free(local, new_sta);
goto out_err;
}
memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
/* set timing information */
link->conf->beacon_int = cbss->beacon_interval;
ies = rcu_dereference(cbss->beacon_ies);
if (ies) {
link->conf->sync_tsf = ies->tsf;
link->conf->sync_device_ts =
bss->device_ts_beacon;
ieee80211_get_dtim(ies,
&link->conf->sync_dtim_count,
NULL);
} else if (!ieee80211_hw_check(&sdata->local->hw,
TIMING_BEACON_ONLY)) {
ies = rcu_dereference(cbss->proberesp_ies);
/* must be non-NULL since beacon IEs were NULL */
link->conf->sync_tsf = ies->tsf;
link->conf->sync_device_ts =
bss->device_ts_presp;
link->conf->sync_dtim_count = 0;
} else {
link->conf->sync_tsf = 0;
link->conf->sync_device_ts = 0;
link->conf->sync_dtim_count = 0;
}
rcu_read_unlock();
}
if (new_sta || override) {
err = ieee80211_prep_channel(sdata, link, cbss,
&link->u.mgd.conn_flags);
if (err) {
if (new_sta)
sta_info_free(local, new_sta);
goto out_err;
}
}
if (new_sta) {
/*
* tell driver about BSSID, basic rates and timing
* this was set up above, before setting the channel
*/
ieee80211_link_info_change_notify(sdata, link,
BSS_CHANGED_BSSID |
BSS_CHANGED_BASIC_RATES |
BSS_CHANGED_BEACON_INT);
if (assoc)
sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
err = sta_info_insert(new_sta);
new_sta = NULL;
if (err) {
sdata_info(sdata,
"failed to insert STA entry for the AP (error %d)\n",
err);
goto out_err;
}
} else
WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid));
/* Cancel scan to ensure that nothing interferes with connection */
if (local->scanning)
ieee80211_scan_cancel(local);
return 0;
out_err:
ieee80211_link_release_channel(&sdata->deflink);
ieee80211_vif_set_links(sdata, 0);
return err;
}
/* config hooks */
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
struct cfg80211_auth_request *req)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_mgd_auth_data *auth_data;
u16 auth_alg;
int err;
bool cont_auth;
/* prepare auth data structure */
switch (req->auth_type) {
case NL80211_AUTHTYPE_OPEN_SYSTEM:
auth_alg = WLAN_AUTH_OPEN;
break;
case NL80211_AUTHTYPE_SHARED_KEY:
if (fips_enabled)
return -EOPNOTSUPP;
auth_alg = WLAN_AUTH_SHARED_KEY;
break;
case NL80211_AUTHTYPE_FT:
auth_alg = WLAN_AUTH_FT;
break;
case NL80211_AUTHTYPE_NETWORK_EAP:
auth_alg = WLAN_AUTH_LEAP;
break;
case NL80211_AUTHTYPE_SAE:
auth_alg = WLAN_AUTH_SAE;
break;
case NL80211_AUTHTYPE_FILS_SK:
auth_alg = WLAN_AUTH_FILS_SK;
break;
case NL80211_AUTHTYPE_FILS_SK_PFS:
auth_alg = WLAN_AUTH_FILS_SK_PFS;
break;
case NL80211_AUTHTYPE_FILS_PK:
auth_alg = WLAN_AUTH_FILS_PK;
break;
default:
return -EOPNOTSUPP;
}
if (ifmgd->assoc_data)
return -EBUSY;
auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
req->ie_len, GFP_KERNEL);
if (!auth_data)
return -ENOMEM;
memcpy(auth_data->ap_addr,
req->ap_mld_addr ?: req->bss->bssid,
ETH_ALEN);
auth_data->bss = req->bss;
auth_data->link_id = req->link_id;
if (req->auth_data_len >= 4) {
if (req->auth_type == NL80211_AUTHTYPE_SAE) {
__le16 *pos = (__le16 *) req->auth_data;
auth_data->sae_trans = le16_to_cpu(pos[0]);
auth_data->sae_status = le16_to_cpu(pos[1]);
}
memcpy(auth_data->data, req->auth_data + 4,
req->auth_data_len - 4);
auth_data->data_len += req->auth_data_len - 4;
}
/* Check if continuing authentication or trying to authenticate with the
* same BSS that we were in the process of authenticating with and avoid
* removal and re-addition of the STA entry in
* ieee80211_prep_connection().
*/
cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss &&
ifmgd->auth_data->link_id == req->link_id;
if (req->ie && req->ie_len) {
memcpy(&auth_data->data[auth_data->data_len],
req->ie, req->ie_len);
auth_data->data_len += req->ie_len;
}
if (req->key && req->key_len) {
auth_data->key_len = req->key_len;
auth_data->key_idx = req->key_idx;
memcpy(auth_data->key, req->key, req->key_len);
}
auth_data->algorithm = auth_alg;
/* try to authenticate/probe */
if (ifmgd->auth_data) {
if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
auth_data->peer_confirmed =
ifmgd->auth_data->peer_confirmed;
}
ieee80211_destroy_auth_data(sdata, cont_auth);
}
/* prep auth_data so we don't go into idle on disassoc */
ifmgd->auth_data = auth_data;
/* If this is continuation of an ongoing SAE authentication exchange
* (i.e., request to send SAE Confirm) and the peer has already
* confirmed, mark authentication completed since we are about to send
* out SAE Confirm.
*/
if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
auth_data->peer_confirmed && auth_data->sae_trans == 2)
ieee80211_mark_sta_auth(sdata);
if (ifmgd->associated) {
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
sdata_info(sdata,
"disconnect from AP %pM for new auth to %pM\n",
sdata->vif.cfg.ap_addr, auth_data->ap_addr);
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
WLAN_REASON_UNSPECIFIED,
false, frame_buf);
ieee80211_report_disconnect(sdata, frame_buf,
sizeof(frame_buf), true,
WLAN_REASON_UNSPECIFIED,
false);
}
sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr);
/* needed for transmitting the auth frame(s) properly */
memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN);
err = ieee80211_prep_connection(sdata, req->bss, req->link_id,
req->ap_mld_addr, cont_auth, false);
if (err)
goto err_clear;
err = ieee80211_auth(sdata);
if (err) {
sta_info_destroy_addr(sdata, auth_data->ap_addr);
goto err_clear;
}
/* hold our own reference */
cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
return 0;
err_clear:
if (!sdata->vif.valid_links) {
eth_zero_addr(sdata->deflink.u.mgd.bssid);
ieee80211_link_info_change_notify(sdata, &sdata->deflink,
BSS_CHANGED_BSSID);
mutex_lock(&sdata->local->mtx);
ieee80211_link_release_channel(&sdata->deflink);
mutex_unlock(&sdata->local->mtx);
}
ifmgd->auth_data = NULL;
kfree(auth_data);
return err;
}
static ieee80211_conn_flags_t
ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgd_assoc_data *assoc_data,
struct cfg80211_assoc_request *req,
ieee80211_conn_flags_t conn_flags,
unsigned int link_id)
{
struct ieee80211_local *local = sdata->local;
const struct cfg80211_bss_ies *beacon_ies;
struct ieee80211_supported_band *sband;
const struct element *ht_elem, *vht_elem;
struct ieee80211_link_data *link;
struct cfg80211_bss *cbss;
struct ieee80211_bss *bss;
bool is_5ghz, is_6ghz;
cbss = assoc_data->link[link_id].bss;
if (WARN_ON(!cbss))
return 0;
bss = (void *)cbss->priv;
sband = local->hw.wiphy->bands[cbss->channel->band];
if (WARN_ON(!sband))
return 0;
link = sdata_dereference(sdata->link[link_id], sdata);
if (WARN_ON(!link))
return 0;
is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
/* for MLO connections assume advertising all rates is OK */
if (!req->ap_mld_addr) {
assoc_data->supp_rates = bss->supp_rates;
assoc_data->supp_rates_len = bss->supp_rates_len;
}
/* copy and link elems for the STA profile */
if (req->links[link_id].elems_len) {
memcpy(assoc_data->ie_pos, req->links[link_id].elems,
req->links[link_id].elems_len);
assoc_data->link[link_id].elems = assoc_data->ie_pos;
assoc_data->link[link_id].elems_len = req->links[link_id].elems_len;
assoc_data->ie_pos += req->links[link_id].elems_len;
}
rcu_read_lock();
ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION);
if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation))
assoc_data->link[link_id].ap_ht_param =
((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param;
else if (!is_6ghz)
conn_flags |= IEEE80211_CONN_DISABLE_HT;
vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) {
memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data,
sizeof(struct ieee80211_vht_cap));
} else if (is_5ghz) {
link_info(link,
"VHT capa missing/short, disabling VHT/HE/EHT\n");
conn_flags |= IEEE80211_CONN_DISABLE_VHT |
IEEE80211_CONN_DISABLE_HE |
IEEE80211_CONN_DISABLE_EHT;
}
rcu_read_unlock();
link->u.mgd.beacon_crc_valid = false;
link->u.mgd.dtim_period = 0;
link->u.mgd.have_beacon = false;
/* override HT/VHT configuration only if the AP and we support it */
if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) {
struct ieee80211_sta_ht_cap sta_ht_cap;
memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
}
rcu_read_lock();
beacon_ies = rcu_dereference(cbss->beacon_ies);
if (beacon_ies) {
const struct element *elem;
u8 dtim_count = 0;
ieee80211_get_dtim(beacon_ies, &dtim_count,
&link->u.mgd.dtim_period);
sdata->deflink.u.mgd.have_beacon = true;
if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
link->conf->sync_tsf = beacon_ies->tsf;
link->conf->sync_device_ts = bss->device_ts_beacon;
link->conf->sync_dtim_count = dtim_count;
}
elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
beacon_ies->data, beacon_ies->len);
if (elem && elem->datalen >= 3)
link->conf->profile_periodicity = elem->data[2];
else
link->conf->profile_periodicity = 0;
elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
beacon_ies->data, beacon_ies->len);
if (elem && elem->datalen >= 11 &&
(elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
link->conf->ema_ap = true;
else
link->conf->ema_ap = false;
}
rcu_read_unlock();
if (bss->corrupt_data) {
char *corrupt_type = "data";
if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
corrupt_type = "beacon and probe response";
else
corrupt_type = "beacon";
} else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) {
corrupt_type = "probe response";
}
sdata_info(sdata, "associating to AP %pM with corrupt %s\n",
cbss->bssid, corrupt_type);
}
if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) {
if (sdata->u.mgd.powersave)
link->smps_mode = IEEE80211_SMPS_DYNAMIC;
else
link->smps_mode = IEEE80211_SMPS_OFF;
} else {
link->smps_mode = link->u.mgd.req_smps;
}
return conn_flags;
}
int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
struct cfg80211_assoc_request *req)
{
unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id;
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_mgd_assoc_data *assoc_data;
const struct element *ssid_elem;
struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
ieee80211_conn_flags_t conn_flags = 0;
struct ieee80211_link_data *link;
struct cfg80211_bss *cbss;
struct ieee80211_bss *bss;
bool override;
int i, err;
size_t size = sizeof(*assoc_data) + req->ie_len;
for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++)
size += req->links[i].elems_len;
/* FIXME: no support for 4-addr MLO yet */
if (sdata->u.mgd.use_4addr && req->link_id >= 0)
return -EOPNOTSUPP;
assoc_data = kzalloc(size, GFP_KERNEL);
if (!assoc_data)
return -ENOMEM;
cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss;
rcu_read_lock();
ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) {
rcu_read_unlock();
kfree(assoc_data);
return -EINVAL;
}
memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen);
assoc_data->ssid_len = ssid_elem->datalen;
memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len);
vif_cfg->ssid_len = assoc_data->ssid_len;
rcu_read_unlock();
if (req->ap_mld_addr) {
for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
if (!req->links[i].bss)
continue;
link = sdata_dereference(sdata->link[i], sdata);
if (link)
ether_addr_copy(assoc_data->link[i].addr,
link->conf->addr);
else
eth_random_addr(assoc_data->link[i].addr);
}
} else {
memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN);
}
assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
memcpy(assoc_data->ap_addr,
req->ap_mld_addr ?: req->bss->bssid,
ETH_ALEN);
if (ifmgd->associated) {
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
sdata_info(sdata,
"disconnect from AP %pM for new assoc to %pM\n",
sdata->vif.cfg.ap_addr, assoc_data->ap_addr);
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
WLAN_REASON_UNSPECIFIED,
false, frame_buf);
ieee80211_report_disconnect(sdata, frame_buf,
sizeof(frame_buf), true,
WLAN_REASON_UNSPECIFIED,
false);
}
if (ifmgd->auth_data && !ifmgd->auth_data->done) {
err = -EBUSY;
goto err_free;
}
if (ifmgd->assoc_data) {
err = -EBUSY;
goto err_free;
}
if (ifmgd->auth_data) {
bool match;
/* keep sta info, bssid if matching */
match = ether_addr_equal(ifmgd->auth_data->ap_addr,
assoc_data->ap_addr) &&
ifmgd->auth_data->link_id == req->link_id;
ieee80211_destroy_auth_data(sdata, match);
}
/* prepare assoc data */
bss = (void *)cbss->priv;
assoc_data->wmm = bss->wmm_used &&
(local->hw.queues >= IEEE80211_NUM_ACS);
/*
* IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
* We still associate in non-HT mode (11a/b/g) if any one of these
* ciphers is configured as pairwise.
* We can set this to true for non-11n hardware, that'll be checked
* separately along with the peer capabilities.
*/
for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
conn_flags |= IEEE80211_CONN_DISABLE_HT;
conn_flags |= IEEE80211_CONN_DISABLE_VHT;
conn_flags |= IEEE80211_CONN_DISABLE_HE;
conn_flags |= IEEE80211_CONN_DISABLE_EHT;
netdev_info(sdata->dev,
"disabling HT/VHT/HE due to WEP/TKIP use\n");
}
}
/* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */
if (!bss->wmm_used) {
conn_flags |= IEEE80211_CONN_DISABLE_HT;
conn_flags |= IEEE80211_CONN_DISABLE_VHT;
conn_flags |= IEEE80211_CONN_DISABLE_HE;
conn_flags |= IEEE80211_CONN_DISABLE_EHT;
netdev_info(sdata->dev,
"disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
}
if (req->flags & ASSOC_REQ_DISABLE_HT) {
mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n");
conn_flags |= IEEE80211_CONN_DISABLE_HT;
conn_flags |= IEEE80211_CONN_DISABLE_VHT;
conn_flags |= IEEE80211_CONN_DISABLE_HE;
conn_flags |= IEEE80211_CONN_DISABLE_EHT;
}
if (req->flags & ASSOC_REQ_DISABLE_VHT) {
mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n");
conn_flags |= IEEE80211_CONN_DISABLE_VHT;
}
if (req->flags & ASSOC_REQ_DISABLE_HE) {
mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n");
conn_flags |= IEEE80211_CONN_DISABLE_HE;
conn_flags |= IEEE80211_CONN_DISABLE_EHT;
}
if (req->flags & ASSOC_REQ_DISABLE_EHT)
conn_flags |= IEEE80211_CONN_DISABLE_EHT;
memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
sizeof(ifmgd->ht_capa_mask));
memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
sizeof(ifmgd->vht_capa_mask));
memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
sizeof(ifmgd->s1g_capa_mask));
if (req->ie && req->ie_len) {
memcpy(assoc_data->ie, req->ie, req->ie_len);
assoc_data->ie_len = req->ie_len;
assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len;
} else {
assoc_data->ie_pos = assoc_data->ie;
}
if (req->fils_kek) {
/* should already be checked in cfg80211 - so warn */
if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
err = -EINVAL;
goto err_free;
}
memcpy(assoc_data->fils_kek, req->fils_kek,
req->fils_kek_len);
assoc_data->fils_kek_len = req->fils_kek_len;
}
if (req->fils_nonces)
memcpy(assoc_data->fils_nonces, req->fils_nonces,
2 * FILS_NONCE_LEN);
/* default timeout */
assoc_data->timeout = jiffies;
assoc_data->timeout_started = true;
assoc_data->assoc_link_id = assoc_link_id;
if (req->ap_mld_addr) {
for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
assoc_data->link[i].conn_flags = conn_flags;
assoc_data->link[i].bss = req->links[i].bss;
}
/* if there was no authentication, set up the link */
err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id));
if (err)
goto err_clear;
} else {
assoc_data->link[0].conn_flags = conn_flags;
assoc_data->link[0].bss = cbss;
}
link = sdata_dereference(sdata->link[assoc_link_id], sdata);
if (WARN_ON(!link)) {
err = -EINVAL;
goto err_clear;
}
/* keep old conn_flags from ieee80211_prep_channel() from auth */
conn_flags |= link->u.mgd.conn_flags;
conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req,
conn_flags, assoc_link_id);
override = link->u.mgd.conn_flags != conn_flags;
link->u.mgd.conn_flags |= conn_flags;
if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
"U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
if (bss->wmm_used && bss->uapsd_supported &&
(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
assoc_data->uapsd = true;
ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
} else {
assoc_data->uapsd = false;
ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
}
if (req->prev_bssid)
memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN);
if (req->use_mfp) {
ifmgd->mfp = IEEE80211_MFP_REQUIRED;
ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
} else {
ifmgd->mfp = IEEE80211_MFP_DISABLED;
ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
}
if (req->flags & ASSOC_REQ_USE_RRM)
ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
else
ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
if (req->crypto.control_port)
ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
else
ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
sdata->control_port_protocol = req->crypto.control_port_ethertype;
sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
sdata->control_port_over_nl80211 =
req->crypto.control_port_over_nl80211;
sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
/* kick off associate process */
ifmgd->assoc_data = assoc_data;
for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
if (!assoc_data->link[i].bss)
continue;
if (i == assoc_data->assoc_link_id)
continue;
/* only calculate the flags, hence link == NULL */
err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss,
&assoc_data->link[i].conn_flags);
if (err)
goto err_clear;
}
/* needed for transmitting the assoc frames properly */
memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN);
err = ieee80211_prep_connection(sdata, cbss, req->link_id,
req->ap_mld_addr, true, override);
if (err)
goto err_clear;
assoc_data->link[assoc_data->assoc_link_id].conn_flags =
link->u.mgd.conn_flags;
if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) {
const struct cfg80211_bss_ies *beacon_ies;
rcu_read_lock();
beacon_ies = rcu_dereference(req->bss->beacon_ies);
if (beacon_ies) {
/*
* Wait up to one beacon interval ...
* should this be more if we miss one?
*/
sdata_info(sdata, "waiting for beacon from %pM\n",
link->u.mgd.bssid);
assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
assoc_data->timeout_started = true;
assoc_data->need_beacon = true;
}
rcu_read_unlock();
}
run_again(sdata, assoc_data->timeout);
return 0;
err_clear:
eth_zero_addr(sdata->deflink.u.mgd.bssid);
ieee80211_link_info_change_notify(sdata, &sdata->deflink,
BSS_CHANGED_BSSID);
ifmgd->assoc_data = NULL;
err_free:
kfree(assoc_data);
return err;
}
int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
struct cfg80211_deauth_request *req)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
bool tx = !req->local_state_change;
struct ieee80211_prep_tx_info info = {
.subtype = IEEE80211_STYPE_DEAUTH,
};
if (ifmgd->auth_data &&
ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) {
sdata_info(sdata,
"aborting authentication with %pM by local choice (Reason: %u=%s)\n",
req->bssid, req->reason_code,
ieee80211_get_reason_code_string(req->reason_code));
drv_mgd_prepare_tx(sdata->local, sdata, &info);
ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
IEEE80211_STYPE_DEAUTH,
req->reason_code, tx,
frame_buf);
ieee80211_destroy_auth_data(sdata, false);
ieee80211_report_disconnect(sdata, frame_buf,
sizeof(frame_buf), true,
req->reason_code, false);
drv_mgd_complete_tx(sdata->local, sdata, &info);
return 0;
}
if (ifmgd->assoc_data &&
ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) {
sdata_info(sdata,
"aborting association with %pM by local choice (Reason: %u=%s)\n",
req->bssid, req->reason_code,
ieee80211_get_reason_code_string(req->reason_code));
drv_mgd_prepare_tx(sdata->local, sdata, &info);
ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
IEEE80211_STYPE_DEAUTH,
req->reason_code, tx,
frame_buf);
ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
ieee80211_report_disconnect(sdata, frame_buf,
sizeof(frame_buf), true,
req->reason_code, false);
return 0;
}
if (ifmgd->associated &&
ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) {
sdata_info(sdata,
"deauthenticating from %pM by local choice (Reason: %u=%s)\n",
req->bssid, req->reason_code,
ieee80211_get_reason_code_string(req->reason_code));
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
req->reason_code, tx, frame_buf);
ieee80211_report_disconnect(sdata, frame_buf,
sizeof(frame_buf), true,
req->reason_code, false);
drv_mgd_complete_tx(sdata->local, sdata, &info);
return 0;
}
return -ENOTCONN;
}
int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
struct cfg80211_disassoc_request *req)
{
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
if (!sdata->u.mgd.associated ||
memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN))
return -ENOTCONN;
sdata_info(sdata,
"disassociating from %pM by local choice (Reason: %u=%s)\n",
req->ap_addr, req->reason_code,
ieee80211_get_reason_code_string(req->reason_code));
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
req->reason_code, !req->local_state_change,
frame_buf);
ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
req->reason_code, false);
return 0;
}
void ieee80211_mgd_stop_link(struct ieee80211_link_data *link)
{
cancel_work_sync(&link->u.mgd.request_smps_work);
cancel_work_sync(&link->u.mgd.chswitch_work);
}
void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
/*
* Make sure some work items will not run after this,
* they will not do anything but might not have been
* cancelled when disconnecting.
*/
cancel_work_sync(&ifmgd->monitor_work);
cancel_work_sync(&ifmgd->beacon_connection_loss_work);
cancel_work_sync(&ifmgd->csa_connection_drop_work);
cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
sdata_lock(sdata);
if (ifmgd->assoc_data)
ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
if (ifmgd->auth_data)
ieee80211_destroy_auth_data(sdata, false);
spin_lock_bh(&ifmgd->teardown_lock);
if (ifmgd->teardown_skb) {
kfree_skb(ifmgd->teardown_skb);
ifmgd->teardown_skb = NULL;
ifmgd->orig_teardown_skb = NULL;
}
kfree(ifmgd->assoc_req_ies);
ifmgd->assoc_req_ies = NULL;
ifmgd->assoc_req_ies_len = 0;
spin_unlock_bh(&ifmgd->teardown_lock);
del_timer_sync(&ifmgd->timer);
sdata_unlock(sdata);
}
void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
enum nl80211_cqm_rssi_threshold_event rssi_event,
s32 rssi_level,
gfp_t gfp)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
}
EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
}
EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
int rssi_min_thold,
int rssi_max_thold)
{
trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
return;
/*
* Scale up threshold values before storing it, as the RSSI averaging
* algorithm uses a scaled up value as well. Change this scaling
* factor if the RSSI averaging algorithm changes.
*/
sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
}
void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
int rssi_min_thold,
int rssi_max_thold)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
WARN_ON(rssi_min_thold == rssi_max_thold ||
rssi_min_thold > rssi_max_thold);
_ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
rssi_max_thold);
}
EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
_ieee80211_enable_rssi_reports(sdata, 0, 0);
}
EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
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