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coral / linux-mtk / 48402961a1cde6f76928681516f43de63feeb61d / . / net / mac80211 / mlme.c
blob: c53a332f7d65a1d8bfa0698c24f56e92bf0025ea [file] [log] [blame]
/*
* 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 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/delay.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_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 u32
ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
struct ieee80211_channel *channel,
const struct ieee80211_ht_operation *ht_oper,
const struct ieee80211_vht_operation *vht_oper,
const struct ieee80211_he_operation *he_oper,
struct cfg80211_chan_def *chandef, bool tracking)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct cfg80211_chan_def vht_chandef;
struct ieee80211_sta_ht_cap sta_ht_cap;
u32 ht_cfreq, ret;
memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
chandef->chan = channel;
chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
chandef->center_freq1 = channel->center_freq;
chandef->center_freq2 = 0;
if (!ht_oper || !sta_ht_cap.ht_supported) {
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
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_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
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 {
/* 40 MHz (and 80 MHz) must be supported for VHT */
ret = IEEE80211_STA_DISABLE_VHT;
/* also mark 40 MHz disabled */
ret |= IEEE80211_STA_DISABLE_40MHZ;
goto out;
}
if (!vht_oper || !sband->vht_cap.vht_supported) {
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
vht_chandef = *chandef;
if (!(ifmgd->flags & IEEE80211_STA_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(&he_oper_vht_cap,
&vht_chandef)) {
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
sdata_info(sdata,
"HE AP VHT information is invalid, disable HE\n");
ret = IEEE80211_STA_DISABLE_HE;
goto out;
}
} else if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
sdata_info(sdata,
"AP VHT information is invalid, disable VHT\n");
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
if (!cfg80211_chandef_valid(&vht_chandef)) {
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
sdata_info(sdata,
"AP VHT information is invalid, disable VHT\n");
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
ret = 0;
goto out;
}
if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
sdata_info(sdata,
"AP VHT information doesn't match HT, disable VHT\n");
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
*chandef = vht_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, &sdata->vif.bss_conf.chandef))
return ret;
/* don't print the message below for VHT mismatch if VHT is disabled */
if (ret & IEEE80211_STA_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_STA_DISABLE_HT |
IEEE80211_STA_DISABLE_VHT;
break;
}
ret |= ieee80211_chandef_downgrade(chandef);
}
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_sub_if_data *sdata,
struct sta_info *sta,
const struct ieee80211_ht_cap *ht_cap,
const struct ieee80211_ht_operation *ht_oper,
const struct ieee80211_vht_operation *vht_oper,
const struct ieee80211_he_operation *he_oper,
const u8 *bssid, u32 *changed)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
struct ieee80211_supported_band *sband =
local->hw.wiphy->bands[chan->band];
struct cfg80211_chan_def chandef;
u16 ht_opmode;
u32 flags;
enum ieee80211_sta_rx_bandwidth new_sta_bw;
int ret;
/* if HT was/is disabled, don't track any bandwidth changes */
if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
return 0;
/* don't check VHT if we associated as non-VHT station */
if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
vht_oper = NULL;
/* don't check HE if we associated as non-HE station */
if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
!ieee80211_get_he_sta_cap(sband))
he_oper = NULL;
if (WARN_ON_ONCE(!sta))
return -EINVAL;
/*
* 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 (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
*changed |= BSS_CHANGED_HT;
sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
}
/* calculate new channel (type) based on HT/VHT/HE operation IEs */
flags = ieee80211_determine_chantype(sdata, sband, chan,
ht_oper, vht_oper, he_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 (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
chandef.width == NL80211_CHAN_WIDTH_80P80)
flags |= ieee80211_chandef_downgrade(&chandef);
if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
chandef.width == NL80211_CHAN_WIDTH_160)
flags |= ieee80211_chandef_downgrade(&chandef);
if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
chandef.width > NL80211_CHAN_WIDTH_20)
flags |= ieee80211_chandef_downgrade(&chandef);
if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
return 0;
sdata_info(sdata,
"AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
ifmgd->bssid, chandef.chan->center_freq, chandef.width,
chandef.center_freq1, chandef.center_freq2);
if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
IEEE80211_STA_DISABLE_VHT |
IEEE80211_STA_DISABLE_40MHZ |
IEEE80211_STA_DISABLE_80P80MHZ |
IEEE80211_STA_DISABLE_160MHZ)) ||
!cfg80211_chandef_valid(&chandef)) {
sdata_info(sdata,
"AP %pM changed bandwidth in a way we can't support - disconnect\n",
ifmgd->bssid);
return -EINVAL;
}
switch (chandef.width) {
case NL80211_CHAN_WIDTH_20_NOHT:
case NL80211_CHAN_WIDTH_20:
new_sta_bw = IEEE80211_STA_RX_BW_20;
break;
case NL80211_CHAN_WIDTH_40:
new_sta_bw = IEEE80211_STA_RX_BW_40;
break;
case NL80211_CHAN_WIDTH_80:
new_sta_bw = IEEE80211_STA_RX_BW_80;
break;
case NL80211_CHAN_WIDTH_80P80:
case NL80211_CHAN_WIDTH_160:
new_sta_bw = IEEE80211_STA_RX_BW_160;
break;
default:
return -EINVAL;
}
if (new_sta_bw > sta->cur_max_bandwidth)
new_sta_bw = sta->cur_max_bandwidth;
if (new_sta_bw < sta->sta.bandwidth) {
sta->sta.bandwidth = new_sta_bw;
rate_control_rate_update(local, sband, sta,
IEEE80211_RC_BW_CHANGED);
}
ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
if (ret) {
sdata_info(sdata,
"AP %pM changed bandwidth to incompatible one - disconnect\n",
ifmgd->bssid);
return ret;
}
if (new_sta_bw > sta->sta.bandwidth) {
sta->sta.bandwidth = new_sta_bw;
rate_control_rate_update(local, sband, sta,
IEEE80211_RC_BW_CHANGED);
}
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)
{
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 (sdata->u.mgd.flags & IEEE80211_STA_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);
/* fall through */
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 may set the owner of the MU-MIMO capability
*/
static void 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)
{
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;
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 (sdata->u.mgd.flags & IEEE80211_STA_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 (sdata->u.mgd.flags & IEEE80211_STA_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 capablity 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.mu_mimo_owner) {
disable_mu_mimo = true;
break;
}
}
if (disable_mu_mimo)
cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
else
sdata->vif.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);
}
/* 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)
{
u8 *pos;
const struct ieee80211_sta_he_cap *he_cap = NULL;
u8 he_cap_size;
he_cap = ieee80211_get_he_sta_cap(sband);
if (!he_cap)
return;
/*
* TODO: the 1 added is because this temporarily is under the EXTENSION
* IE. Get rid of it when it moves.
*/
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);
ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
}
static void 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 sk_buff *skb;
struct ieee80211_mgmt *mgmt;
u8 *pos, qos_info;
size_t offset = 0, noffset;
int i, count, rates_len, supp_rates_len, shift;
u16 capab;
struct ieee80211_supported_band *sband;
struct ieee80211_chanctx_conf *chanctx_conf;
struct ieee80211_channel *chan;
u32 rates = 0;
sdata_assert_lock(sdata);
rcu_read_lock();
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
if (WARN_ON(!chanctx_conf)) {
rcu_read_unlock();
return;
}
chan = chanctx_conf->def.chan;
rcu_read_unlock();
sband = local->hw.wiphy->bands[chan->band];
shift = ieee80211_vif_get_shift(&sdata->vif);
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(&chanctx_conf->def, 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 = 0;
for (i = 0; i < sband->n_bitrates; i++) {
rates |= BIT(i);
rates_len++;
}
}
skb = alloc_skb(local->hw.extra_tx_headroom +
sizeof(*mgmt) + /* bit too much but doesn't matter */
2 + assoc_data->ssid_len + /* SSID */
4 + rates_len + /* (extended) rates */
4 + /* power capability */
2 + 2 * sband->n_channels + /* supported channels */
2 + sizeof(struct ieee80211_ht_cap) + /* HT */
2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
sizeof(struct ieee80211_he_mcs_nss_supp) +
IEEE80211_HE_PPE_THRES_MAX_LEN +
assoc_data->ie_len + /* extra IEs */
(assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
9, /* WMM */
GFP_KERNEL);
if (!skb)
return;
skb_reserve(skb, local->hw.extra_tx_headroom);
capab = WLAN_CAPABILITY_ESS;
if (sband->band == NL80211_BAND_2GHZ) {
capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
}
if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
capab |= WLAN_CAPABILITY_PRIVACY;
if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
capab |= WLAN_CAPABILITY_RADIO_MEASURE;
mgmt = skb_put_zero(skb, 24);
memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
skb_put(skb, 10);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_REASSOC_REQ);
mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
mgmt->u.reassoc_req.listen_interval =
cpu_to_le16(local->hw.conf.listen_interval);
memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
ETH_ALEN);
} else {
skb_put(skb, 4);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_ASSOC_REQ);
mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
mgmt->u.assoc_req.listen_interval =
cpu_to_le16(local->hw.conf.listen_interval);
}
/* SSID */
pos = skb_put(skb, 2 + assoc_data->ssid_len);
*pos++ = WLAN_EID_SSID;
*pos++ = assoc_data->ssid_len;
memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
/* add all rates which were marked to be used above */
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;
}
}
}
if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
capab & WLAN_CAPABILITY_RADIO_MEASURE) {
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(&chanctx_conf->def);
}
if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
/* 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++) {
*pos++ = ieee80211_frequency_to_channel(
sband->channels[i].center_freq);
*pos++ = 1; /* one channel in the subband*/
}
}
/* if present, add any custom IEs that go before HT */
if (assoc_data->ie_len) {
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,
};
noffset = ieee80211_ie_split_ric(assoc_data->ie,
assoc_data->ie_len,
before_ht,
ARRAY_SIZE(before_ht),
after_ric,
ARRAY_SIZE(after_ric),
offset);
skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
offset = noffset;
}
if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
sband, chan, sdata->smps_mode);
/* if present, add any custom IEs that go before VHT */
if (assoc_data->ie_len) {
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 */
};
/* RIC already taken above, so no need to handle here anymore */
noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
before_vht, ARRAY_SIZE(before_vht),
offset);
skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
offset = noffset;
}
/* if present, add any custom IEs that go before HE */
if (assoc_data->ie_len) {
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 */
};
/* RIC already taken above, so no need to handle here anymore */
noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
before_he, ARRAY_SIZE(before_he),
offset);
pos = skb_put(skb, noffset - offset);
memcpy(pos, assoc_data->ie + offset, noffset - offset);
offset = noffset;
}
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
ieee80211_add_vht_ie(sdata, skb, sband,
&assoc_data->ap_vht_cap);
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
ieee80211_add_he_ie(sdata, skb, sband);
/* if present, add any custom non-vendor IEs that go after HE */
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 &&
fils_encrypt_assoc_req(skb, assoc_data) < 0) {
dev_kfree_skb(skb);
return;
}
drv_mgd_prepare_tx(local, sdata, 0);
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);
}
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;
/* Don't send NDPs when STA is connected HE */
if (sdata->vif.type == NL80211_IFTYPE_STATION &&
!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
return;
skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
!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);
}
static 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;
/* Don't send NDPs when connected HE */
if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
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->u.mgd.bssid, ETH_ALEN);
memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
ieee80211_tx_skb(sdata, skb);
}
/* spectrum management related things */
static void ieee80211_chswitch_work(struct work_struct *work)
{
struct ieee80211_sub_if_data *sdata =
container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
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 (!sdata->vif.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 (sdata->reserved_chanctx) {
struct ieee80211_supported_band *sband = NULL;
struct sta_info *mgd_sta = NULL;
enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
/*
* with multi-vif csa driver may call ieee80211_csa_finish()
* many times while waiting for other interfaces to use their
* reservations
*/
if (sdata->reserved_ready)
goto out;
if (sdata->vif.bss_conf.chandef.width !=
sdata->csa_chandef.width) {
/*
* For managed interface, we need to also update the AP
* station bandwidth and align the rate scale algorithm
* on the bandwidth change. Here we only consider the
* bandwidth of the new channel definition (as channel
* switch flow does not have the full HT/VHT/HE
* information), assuming that if additional changes are
* required they would be done as part of the processing
* of the next beacon from the AP.
*/
switch (sdata->csa_chandef.width) {
case NL80211_CHAN_WIDTH_20_NOHT:
case NL80211_CHAN_WIDTH_20:
default:
bw = IEEE80211_STA_RX_BW_20;
break;
case NL80211_CHAN_WIDTH_40:
bw = IEEE80211_STA_RX_BW_40;
break;
case NL80211_CHAN_WIDTH_80:
bw = IEEE80211_STA_RX_BW_80;
break;
case NL80211_CHAN_WIDTH_80P80:
case NL80211_CHAN_WIDTH_160:
bw = IEEE80211_STA_RX_BW_160;
break;
}
mgd_sta = sta_info_get(sdata, ifmgd->bssid);
sband =
local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
}
if (sdata->vif.bss_conf.chandef.width >
sdata->csa_chandef.width) {
mgd_sta->sta.bandwidth = bw;
rate_control_rate_update(local, sband, mgd_sta,
IEEE80211_RC_BW_CHANGED);
}
ret = ieee80211_vif_use_reserved_context(sdata);
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;
}
if (sdata->vif.bss_conf.chandef.width <
sdata->csa_chandef.width) {
mgd_sta->sta.bandwidth = bw;
rate_control_rate_update(local, sband, mgd_sta,
IEEE80211_RC_BW_CHANGED);
}
goto out;
}
if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
&sdata->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;
}
ifmgd->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_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
int ret;
sdata_assert_lock(sdata);
WARN_ON(!sdata->vif.csa_active);
if (sdata->csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->csa_block_tx = false;
}
sdata->vif.csa_active = false;
ifmgd->csa_waiting_bcn = 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, &sdata->reserved_chandef);
}
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;
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, &ifmgd->chswitch_work);
}
}
EXPORT_SYMBOL(ieee80211_chswitch_done);
static void ieee80211_chswitch_timer(struct timer_list *t)
{
struct ieee80211_sub_if_data *sdata =
from_timer(sdata, t, u.mgd.chswitch_timer);
ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
}
static void
ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
u64 timestamp, u32 device_timestamp,
struct ieee802_11_elems *elems,
bool beacon)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct cfg80211_bss *cbss = ifmgd->associated;
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;
int res;
sdata_assert_lock(sdata);
if (!cbss)
return;
if (local->scanning)
return;
/* disregard subsequent announcements if we are already processing */
if (sdata->vif.csa_active)
return;
current_band = cbss->channel->band;
res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
ifmgd->flags,
ifmgd->associated->bssid, &csa_ie);
if (res < 0)
ieee80211_queue_work(&local->hw,
&ifmgd->csa_connection_drop_work);
if (res)
return;
if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
IEEE80211_CHAN_DISABLED)) {
sdata_info(sdata,
"AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
ifmgd->associated->bssid,
csa_ie.chandef.chan->center_freq,
csa_ie.chandef.width, csa_ie.chandef.center_freq1,
csa_ie.chandef.center_freq2);
ieee80211_queue_work(&local->hw,
&ifmgd->csa_connection_drop_work);
return;
}
if (cfg80211_chandef_identical(&csa_ie.chandef,
&sdata->vif.bss_conf.chandef)) {
if (ifmgd->csa_ignored_same_chan)
return;
sdata_info(sdata,
"AP %pM tries to chanswitch to same channel, ignore\n",
ifmgd->associated->bssid);
ifmgd->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(sdata->vif.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;
}
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;
if (drv_pre_channel_switch(sdata, &ch_switch)) {
sdata_info(sdata,
"preparing for channel switch failed, disconnecting\n");
goto drop_connection;
}
res = ieee80211_vif_reserve_chanctx(sdata, &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);
sdata->vif.csa_active = true;
sdata->csa_chandef = csa_ie.chandef;
sdata->csa_block_tx = csa_ie.mode;
ifmgd->csa_ignored_same_chan = false;
if (sdata->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,
csa_ie.count);
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, &ifmgd->chswitch_work);
else
mod_timer(&ifmgd->chswitch_timer,
TU_TO_EXP_TIME((csa_ie.count - 1) *
cbss->beacon_interval));
return;
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.
*/
sdata->vif.csa_active = true;
sdata->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);
/* fall through */
case NL80211_BAND_2GHZ:
case NL80211_BAND_60GHZ:
chan_increment = 1;
break;
case NL80211_BAND_5GHZ:
chan_increment = 4;
break;
}
/* 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_sub_if_data *sdata,
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)
{
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 (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 (sdata->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,
sdata->u.mgd.bssid);
} else { /* has_cisco_pwr is always true here. */
new_ap_level = pwr_level_cisco;
if (sdata->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, sdata->u.mgd.bssid);
}
sdata->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_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 (!mgd->have_beacon)
return false;
rcu_read_lock();
sta = sta_info_get(sdata, mgd->bssid);
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)) {
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->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.bss_conf.ps != ps_allowed) {
sdata->vif.bss_conf.ps = ps_allowed;
ieee80211_bss_info_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_sub_if_data *sdata =
container_of(delayed_work, struct ieee80211_sub_if_data,
dfs_cac_timer_work);
struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
mutex_lock(&sdata->local->mtx);
if (sdata->wdev.cac_started) {
ieee80211_vif_release_channel(sdata);
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, ac, &sdata->tx_conf[ac]))
sdata_err(sdata,
"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, ac,
&sdata->tx_conf[non_acm_ac]))
sdata_err(sdata,
"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_bss_info_change_notify(sdata, 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);
}
/* MLME */
static bool
ieee80211_sta_wmm_params(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
const u8 *wmm_param, size_t wmm_param_len,
const struct ieee80211_mu_edca_param_set *mu_edca)
{
struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
size_t left;
int 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;
if (count == ifmgd->wmm_last_param_set)
return false;
ifmgd->wmm_last_param_set = 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++) {
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);
sdata->tx_conf[ac] = params[ac];
if (!ifmgd->tx_tspec[ac].downgraded &&
drv_conf_tx(local, sdata, ac, &params[ac]))
sdata_err(sdata,
"failed to set TX queue parameters for AC %d\n",
ac);
}
/* enable WMM or activate new settings */
sdata->vif.bss_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_sub_if_data *sdata,
u16 capab, bool erp_valid, u8 erp)
{
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
struct ieee80211_supported_band *sband;
u32 changed = 0;
bool use_protection;
bool use_short_preamble;
bool use_short_slot;
sband = ieee80211_get_sband(sdata);
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)
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 void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
struct cfg80211_bss *cbss,
u32 bss_info_changed)
{
struct ieee80211_bss *bss = (void *)cbss->priv;
struct ieee80211_local *local = sdata->local;
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
bss_info_changed |= BSS_CHANGED_ASSOC;
bss_info_changed |= ieee80211_handle_bss_capability(sdata,
bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
beacon_loss_count * bss_conf->beacon_int));
sdata->u.mgd.associated = cbss;
memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
ieee80211_check_rate_mask(sdata);
sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
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) {
sdata->u.mgd.p2p_noa_index =
bss_conf->p2p_noa_attr.index;
bss_info_changed |= BSS_CHANGED_P2P_PS;
}
}
rcu_read_unlock();
}
/* just to be sure */
ieee80211_stop_poll(sdata);
ieee80211_led_assoc(local, 1);
if (sdata->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 = sdata->u.mgd.dtim_period ?: 1;
bss_conf->beacon_rate = bss->beacon_rate;
bss_info_changed |= BSS_CHANGED_BEACON_INFO;
} else {
bss_conf->beacon_rate = NULL;
bss_conf->dtim_period = 0;
}
bss_conf->assoc = 1;
/* Tell the driver to monitor connection quality (if supported) */
if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
bss_conf->cqm_rssi_thold)
bss_info_changed |= BSS_CHANGED_CQM;
/* Enable ARP filtering */
if (bss_conf->arp_addr_cnt)
bss_info_changed |= BSS_CHANGED_ARP_FILTER;
ieee80211_bss_info_change_notify(sdata, bss_info_changed);
mutex_lock(&local->iflist_mtx);
ieee80211_recalc_ps(local);
mutex_unlock(&local->iflist_mtx);
ieee80211_recalc_smps(sdata);
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;
u32 changed = 0;
sdata_assert_lock(sdata);
if (WARN_ON_ONCE(tx && !frame_buf))
return;
if (WARN_ON(!ifmgd->associated))
return;
ieee80211_stop_poll(sdata);
ifmgd->associated = 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) &&
!ifmgd->have_beacon)
drv_mgd_prepare_tx(sdata->local, sdata, 0);
ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
reason, tx, frame_buf);
}
/* flush out frame - make sure the deauth was actually sent */
if (tx)
ieee80211_flush_queues(local, sdata, false);
/* clear bssid only after building the needed mgmt frames */
eth_zero_addr(ifmgd->bssid);
/* remove AP and TDLS peers */
sta_info_flush(sdata);
/* finally reset all BSS / config parameters */
changed |= ieee80211_reset_erp_info(sdata);
ieee80211_led_assoc(local, 0);
changed |= BSS_CHANGED_ASSOC;
sdata->vif.bss_conf.assoc = false;
ifmgd->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 */
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));
changed |= BSS_CHANGED_MU_GROUPS;
sdata->vif.mu_mimo_owner = false;
sdata->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.bss_conf.arp_addr_cnt)
changed |= BSS_CHANGED_ARP_FILTER;
sdata->vif.bss_conf.qos = false;
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);
/* disassociated - set to defaults now */
ieee80211_set_wmm_default(sdata, 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->u.mgd.chswitch_timer);
sdata->vif.bss_conf.dtim_period = 0;
sdata->vif.bss_conf.beacon_rate = NULL;
ifmgd->have_beacon = false;
ifmgd->flags = 0;
mutex_lock(&local->mtx);
ieee80211_vif_release_channel(sdata);
sdata->vif.csa_active = false;
ifmgd->csa_waiting_bcn = false;
ifmgd->csa_ignored_same_chan = false;
if (sdata->csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->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->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
}
void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
struct ieee80211_hdr *hdr)
{
/*
* We can postpone the mgd.timer whenever receiving unicast frames
* from AP because we know that the connection is working both ways
* at that time. But multicast frames (and hence also beacons) must
* be ignored here, because we need to trigger the timer during
* data idle periods for sending the periodic probe request to the
* AP we're connected to.
*/
if (is_multicast_ether_addr(hdr->addr1))
return;
ieee80211_sta_reset_conn_monitor(sdata);
}
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 = ieee80211_get_tid(hdr);
int ac = ieee80211_ac_from_tid(tid);
struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
unsigned long now = jiffies;
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_data(hdr->frame_control))
return;
if (ieee80211_is_any_nullfunc(hdr->frame_control) &&
sdata->u.mgd.probe_send_count > 0) {
if (ack)
ieee80211_sta_reset_conn_monitor(sdata);
else
sdata->u.mgd.nullfunc_failed = true;
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
return;
}
if (ack)
ieee80211_sta_reset_conn_monitor(sdata);
}
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;
const u8 *ssid;
u8 *dst = ifmgd->associated->bssid;
u8 unicast_limit = max(1, max_probe_tries - 3);
struct sta_info *sta;
/*
* 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 {
int ssid_len;
rcu_read_lock();
ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
if (WARN_ON_ONCE(ssid == NULL))
ssid_len = 0;
else
ssid_len = ssid[1];
ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
ssid + 2, ssid_len,
ifmgd->associated->channel);
rcu_read_unlock();
}
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 (!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 (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 u8 *ssid;
int ssid_len;
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
return NULL;
sdata_assert_lock(sdata);
if (ifmgd->associated)
cbss = ifmgd->associated;
else if (ifmgd->auth_data)
cbss = ifmgd->auth_data->bss;
else if (ifmgd->assoc_data)
cbss = ifmgd->assoc_data->bss;
else
return NULL;
rcu_read_lock();
ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN,
"invalid SSID element (len=%d)", ssid ? ssid[1] : -1))
ssid_len = 0;
else
ssid_len = ssid[1];
skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
(u32) -1, cbss->channel,
ssid + 2, 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)
{
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);
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;
}
tx = !sdata->csa_block_tx;
/* AP is probably out of range (or not reachable for another reason) so
* remove the bss struct for that AP.
*/
cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
tx, frame_buf);
mutex_lock(&local->mtx);
sdata->vif.csa_active = false;
ifmgd->csa_waiting_bcn = false;
if (sdata->csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->csa_block_tx = false;
}
mutex_unlock(&local->mtx);
ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
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->associated)
ifmgd->beacon_loss_count++;
if (ifmgd->connection_loss) {
sdata_info(sdata, "Connection to AP %pM lost\n",
ifmgd->bssid);
__ieee80211_disconnect(sdata);
} else {
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);
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->bss->bssid);
eth_zero_addr(sdata->u.mgd.bssid);
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
sdata->u.mgd.flags = 0;
mutex_lock(&sdata->local->mtx);
ieee80211_vif_release_channel(sdata);
mutex_unlock(&sdata->local->mtx);
}
cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
kfree(auth_data);
sdata->u.mgd.auth_data = NULL;
}
static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
bool assoc, bool abandon)
{
struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
sdata_assert_lock(sdata);
if (!assoc) {
/*
* 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->bss->bssid);
eth_zero_addr(sdata->u.mgd.bssid);
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
sdata->u.mgd.flags = 0;
sdata->vif.mu_mimo_owner = false;
mutex_lock(&sdata->local->mtx);
ieee80211_vif_release_channel(sdata);
mutex_unlock(&sdata->local->mtx);
if (abandon)
cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
}
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;
u8 *pos;
struct ieee802_11_elems elems;
u32 tx_flags = 0;
pos = mgmt->u.auth.variable;
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
if (!elems.challenge)
return;
auth_data->expected_transaction = 4;
drv_mgd_prepare_tx(sdata->local, sdata, 0);
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,
elems.challenge - 2, elems.challenge_len + 2,
auth_data->bss->bssid, auth_data->bss->bssid,
auth_data->key, auth_data->key_len,
auth_data->key_idx, tx_flags);
}
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;
u8 bssid[ETH_ALEN];
u16 auth_alg, auth_transaction, status_code;
struct sta_info *sta;
struct ieee80211_event event = {
.type = MLME_EVENT,
.u.mlme.data = AUTH_EVENT,
};
sdata_assert_lock(sdata);
if (len < 24 + 6)
return;
if (!ifmgd->auth_data || ifmgd->auth_data->done)
return;
memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
if (!ether_addr_equal(bssid, 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_transaction != ifmgd->auth_data->expected_transaction) {
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);
return;
}
if (status_code != WLAN_STATUS_SUCCESS) {
sdata_info(sdata, "%pM denied authentication (status %d)\n",
mgmt->sa, status_code);
ieee80211_destroy_auth_data(sdata, false);
cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
event.u.mlme.status = MLME_DENIED;
event.u.mlme.reason = status_code;
drv_event_callback(sdata->local, sdata, &event);
return;
}
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);
return;
}
event.u.mlme.status = MLME_SUCCESS;
drv_event_callback(sdata->local, sdata, &event);
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);
if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
ifmgd->auth_data->expected_transaction != 2) {
/*
* Report auth frame to user space for processing since another
* round of Authentication frames is still needed.
*/
cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
return;
}
/* move station state to auth */
mutex_lock(&sdata->local->sta_mtx);
sta = sta_info_get(sdata, bssid);
if (!sta) {
WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
goto out_err;
}
if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
sdata_info(sdata, "failed moving %pM to auth\n", bssid);
goto out_err;
}
mutex_unlock(&sdata->local->sta_mtx);
cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
return;
out_err:
mutex_unlock(&sdata->local->sta_mtx);
/* ignore frame -- wait for timeout */
}
#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, ifmgd->associated->bssid)) {
const u8 *bssid = ifmgd->associated->bssid;
sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
bssid, 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);
return;
}
if (ifmgd->assoc_data &&
ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
const u8 *bssid = ifmgd->assoc_data->bss->bssid;
sdata_info(sdata,
"deauthenticated from %pM while associating (Reason: %u=%s)\n",
bssid, reason_code,
ieee80211_get_reason_code_string(reason_code));
ieee80211_destroy_assoc_data(sdata, false, true);
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, ifmgd->associated->bssid))
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",
mgmt->sa, 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);
}
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 and VHT 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))
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