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android-kvm / linux / refs/heads/for-upstream/guestmem / . / 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 - 2024 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 <linux/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
#define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100)
#define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00
#define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5)
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)
{
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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 enum ieee80211_conn_mode
ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata,
struct ieee80211_channel *channel,
u32 vht_cap_info,
const struct ieee802_11_elems *elems,
bool ignore_ht_channel_mismatch,
const struct ieee80211_conn_settings *conn,
struct cfg80211_chan_def *chandef)
{
const struct ieee80211_ht_operation *ht_oper = elems->ht_operation;
const struct ieee80211_vht_operation *vht_oper = elems->vht_operation;
const struct ieee80211_he_operation *he_oper = elems->he_operation;
const struct ieee80211_eht_operation *eht_oper = elems->eht_operation;
struct ieee80211_supported_band *sband =
sdata->local->hw.wiphy->bands[channel->band];
struct cfg80211_chan_def vht_chandef;
bool no_vht = false;
u32 ht_cfreq;
*chandef = (struct cfg80211_chan_def) {
.chan = channel,
.width = NL80211_CHAN_WIDTH_20_NOHT,
.center_freq1 = channel->center_freq,
.freq1_offset = channel->freq_offset,
};
/* get special S1G case out of the way */
if (sband->band == NL80211_BAND_S1GHZ) {
if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) {
sdata_info(sdata,
"Missing S1G Operation Element? Trying operating == primary\n");
chandef->width = ieee80211_s1g_channel_width(channel);
}
return IEEE80211_CONN_MODE_S1G;
}
/* get special 6 GHz case out of the way */
if (sband->band == NL80211_BAND_6GHZ) {
enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT;
/* this is an error */
if (conn->mode < IEEE80211_CONN_MODE_HE)
return IEEE80211_CONN_MODE_LEGACY;
if (!elems->he_6ghz_capa || !elems->he_cap) {
sdata_info(sdata,
"HE 6 GHz AP is missing HE/HE 6 GHz band capability\n");
return IEEE80211_CONN_MODE_LEGACY;
}
if (!eht_oper || !elems->eht_cap) {
eht_oper = NULL;
mode = IEEE80211_CONN_MODE_HE;
}
if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper,
eht_oper, chandef)) {
sdata_info(sdata, "bad HE/EHT 6 GHz operation\n");
return IEEE80211_CONN_MODE_LEGACY;
}
return mode;
}
/* now we have the progression HT, VHT, ... */
if (conn->mode < IEEE80211_CONN_MODE_HT)
return IEEE80211_CONN_MODE_LEGACY;
if (!ht_oper || !elems->ht_cap_elem)
return IEEE80211_CONN_MODE_LEGACY;
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 (!ignore_ht_channel_mismatch && 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);
return IEEE80211_CONN_MODE_LEGACY;
}
ieee80211_chandef_ht_oper(ht_oper, chandef);
if (conn->mode < IEEE80211_CONN_MODE_VHT)
return IEEE80211_CONN_MODE_HT;
vht_chandef = *chandef;
/*
* having he_cap/he_oper parsed out implies we're at
* least operating as HE STA
*/
if (elems->he_cap && he_oper &&
he_oper->he_oper_params & cpu_to_le32(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)) {
sdata_info(sdata,
"HE AP VHT information is invalid, disabling HE\n");
/* this will cause us to re-parse as VHT STA */
return IEEE80211_CONN_MODE_VHT;
}
} else if (!vht_oper || !elems->vht_cap_elem) {
if (sband->band == NL80211_BAND_5GHZ) {
sdata_info(sdata,
"VHT information is missing, disabling VHT\n");
return IEEE80211_CONN_MODE_HT;
}
no_vht = true;
} else if (sband->band == NL80211_BAND_2GHZ) {
no_vht = true;
} else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
vht_cap_info,
vht_oper, ht_oper,
&vht_chandef)) {
sdata_info(sdata,
"AP VHT information is invalid, disabling VHT\n");
return IEEE80211_CONN_MODE_HT;
}
if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
sdata_info(sdata,
"AP VHT information doesn't match HT, disabling VHT\n");
return IEEE80211_CONN_MODE_HT;
}
*chandef = vht_chandef;
/* stick to current max mode if we or the AP don't have HE */
if (conn->mode < IEEE80211_CONN_MODE_HE ||
!elems->he_operation || !elems->he_cap) {
if (no_vht)
return IEEE80211_CONN_MODE_HT;
return IEEE80211_CONN_MODE_VHT;
}
/* stick to HE if we or the AP don't have EHT */
if (conn->mode < IEEE80211_CONN_MODE_EHT ||
!eht_oper || !elems->eht_cap)
return IEEE80211_CONN_MODE_HE;
/*
* 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->params & IEEE80211_EHT_OPER_INFO_PRESENT) {
struct cfg80211_chan_def eht_chandef = *chandef;
ieee80211_chandef_eht_oper((const void *)eht_oper->optional,
&eht_chandef);
eht_chandef.punctured =
ieee80211_eht_oper_dis_subchan_bitmap(eht_oper);
if (!cfg80211_chandef_valid(&eht_chandef)) {
sdata_info(sdata,
"AP EHT information is invalid, disabling EHT\n");
return IEEE80211_CONN_MODE_HE;
}
if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) {
sdata_info(sdata,
"AP EHT information doesn't match HT/VHT/HE, disabling EHT\n");
return IEEE80211_CONN_MODE_HE;
}
*chandef = eht_chandef;
}
return IEEE80211_CONN_MODE_EHT;
}
static bool
ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
const struct ieee80211_he_cap_elem *he_cap,
const struct ieee80211_he_operation *he_op)
{
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 nss;
if (!he_cap)
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_vif(sband, &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 u8
ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap,
const struct ieee80211_sta_eht_cap *sta_eht_cap,
unsigned int idx, int bw)
{
u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0];
u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0];
/* handle us being a 20 MHz-only EHT STA - with four values
* for MCS 0-7, 8-9, 10-11, 12-13.
*/
if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL))
return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx];
/* the others have MCS 0-9 together, rather than separately from 0-7 */
if (idx > 0)
idx--;
switch (bw) {
case 0:
return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx];
case 1:
if (!(he_phy_cap0 &
(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G)))
return 0xff; /* pass check */
return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx];
case 2:
if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ))
return 0xff; /* pass check */
return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx];
}
WARN_ON(1);
return 0;
}
static bool
ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
const struct ieee80211_eht_operation *eht_op)
{
const struct ieee80211_sta_he_cap *sta_he_cap =
ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
const struct ieee80211_sta_eht_cap *sta_eht_cap =
ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req;
unsigned int i;
if (!sta_he_cap || !sta_eht_cap || !eht_op)
return false;
req = &eht_op->basic_mcs_nss;
for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) {
u8 req_rx_nss, req_tx_nss;
unsigned int bw;
req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i],
IEEE80211_EHT_MCS_NSS_RX);
req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i],
IEEE80211_EHT_MCS_NSS_TX);
for (bw = 0; bw < 3; bw++) {
u8 have, have_rx_nss, have_tx_nss;
have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap,
sta_eht_cap,
i, bw);
have_rx_nss = u8_get_bits(have,
IEEE80211_EHT_MCS_NSS_RX);
have_tx_nss = u8_get_bits(have,
IEEE80211_EHT_MCS_NSS_TX);
if (req_rx_nss > have_rx_nss ||
req_tx_nss > have_tx_nss)
return false;
}
}
return true;
}
static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata,
const struct cfg80211_chan_def *chandef,
u32 prohibited_flags)
{
if (!cfg80211_chandef_usable(sdata->local->hw.wiphy,
chandef, prohibited_flags))
return false;
if (chandef->punctured &&
ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING))
return false;
if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ &&
ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ))
return false;
return true;
}
static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c)
{
if (c->width == NL80211_CHAN_WIDTH_80P80)
return 4 + 4;
return nl80211_chan_width_to_mhz(c->width) / 20;
}
static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c)
{
switch (c->width) {
case NL80211_CHAN_WIDTH_20:
case NL80211_CHAN_WIDTH_20_NOHT:
return 1;
case NL80211_CHAN_WIDTH_40:
return 2;
case NL80211_CHAN_WIDTH_80P80:
case NL80211_CHAN_WIDTH_80:
return 3;
case NL80211_CHAN_WIDTH_160:
return 4;
case NL80211_CHAN_WIDTH_320:
return 5;
default:
WARN_ON(1);
return 0;
}
}
VISIBLE_IF_MAC80211_KUNIT int
ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap,
u8 n_partial_subchans)
{
int n = ieee80211_chandef_num_subchans(ap);
struct cfg80211_chan_def tmp = *ap;
int offset = 0;
/*
* Given a chandef (in this context, it's the AP's) and a number
* of subchannels that we want to look at ('n_partial_subchans'),
* calculate the offset in number of subchannels between the full
* and the subset with the desired width.
*/
/* same number of subchannels means no offset, obviously */
if (n == n_partial_subchans)
return 0;
/* don't WARN - misconfigured APs could cause this if their N > width */
if (n < n_partial_subchans)
return 0;
while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) {
u32 prev = tmp.center_freq1;
ieee80211_chandef_downgrade(&tmp, NULL);
/*
* if center_freq moved up, half the original channels
* are gone now but were below, so increase offset
*/
if (prev < tmp.center_freq1)
offset += ieee80211_chandef_num_subchans(&tmp);
}
/*
* 80+80 with secondary 80 below primary - four subchannels for it
* (we cannot downgrade *to* 80+80, so no need to consider 'tmp')
*/
if (ap->width == NL80211_CHAN_WIDTH_80P80 &&
ap->center_freq2 < ap->center_freq1)
offset += 4;
return offset;
}
EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset);
VISIBLE_IF_MAC80211_KUNIT void
ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd,
const struct cfg80211_chan_def *ap,
const struct cfg80211_chan_def *used)
{
u8 needed = ieee80211_chandef_num_subchans(used);
u8 have = ieee80211_chandef_num_subchans(ap);
u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ];
u8 offset;
if (!psd->valid)
return;
/* if N is zero, all defaults were used, no point in rearranging */
if (!psd->n)
goto out;
BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power));
/*
* This assumes that 'N' is consistent with the HE channel, as
* it should be (otherwise the AP is broken).
*
* In psd->power we have values in the order 0..N, 0..K, where
* N+K should cover the entire channel per 'ap', but even if it
* doesn't then we've pre-filled 'unlimited' as defaults.
*
* But this is all the wrong order, we want to have them in the
* order of the 'used' channel.
*
* So for example, we could have a 320 MHz EHT AP, which has the
* HE channel as 80 MHz (e.g. due to puncturing, which doesn't
* seem to be considered for the TPE), as follows:
*
* EHT 320: | | | | | | | | | | | | | | | | |
* HE 80: | | | | |
* used 160: | | | | | | | | |
*
* N entries: |--|--|--|--|
* K entries: |--|--|--|--|--|--|--|--| |--|--|--|--|
* power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15
* full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
* used chan: 0 1 2 3 4 5 6 7
*
* The idx in the power array ('power idx') is like this since it
* comes directly from the element's N and K entries in their
* element order, and those are this way for HE compatibility.
*
* Rearrange them as desired here, first by putting them into the
* 'full chan' order, and then selecting the necessary subset for
* the 'used chan'.
*/
/* first reorder according to AP channel */
offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n);
for (int i = 0; i < have; i++) {
if (i < offset)
tmp[i] = psd->power[i + psd->n];
else if (i < offset + psd->n)
tmp[i] = psd->power[i - offset];
else
tmp[i] = psd->power[i];
}
/*
* and then select the subset for the used channel
* (set everything to defaults first in case a driver is confused)
*/
memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power));
offset = ieee80211_calc_chandef_subchan_offset(ap, needed);
for (int i = 0; i < needed; i++)
psd->power[i] = tmp[offset + i];
out:
/* limit, but don't lie if there are defaults in the data */
if (needed < psd->count)
psd->count = needed;
}
EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd);
static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe,
const struct cfg80211_chan_def *ap,
const struct cfg80211_chan_def *used)
{
/* ignore this completely for narrow/invalid channels */
if (!ieee80211_chandef_num_subchans(ap) ||
!ieee80211_chandef_num_subchans(used)) {
ieee80211_clear_tpe(tpe);
return;
}
for (int i = 0; i < 2; i++) {
int needed_pwr_count;
ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used);
ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used);
/* limit this to the widths we actually need */
needed_pwr_count = ieee80211_chandef_num_widths(used);
if (needed_pwr_count < tpe->max_local[i].count)
tpe->max_local[i].count = needed_pwr_count;
if (needed_pwr_count < tpe->max_reg_client[i].count)
tpe->max_reg_client[i].count = needed_pwr_count;
}
}
/*
* The AP part of the channel request is used to distinguish settings
* to the device used for wider bandwidth OFDMA. This is used in the
* channel context code to assign two channel contexts even if they're
* both for the same channel, if the AP bandwidths are incompatible.
* If not EHT (or driver override) then ap.chan == NULL indicates that
* there's no wider BW OFDMA used.
*/
static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata,
struct ieee80211_chan_req *chanreq,
struct ieee80211_conn_settings *conn,
struct cfg80211_chan_def *ap_chandef)
{
chanreq->ap.chan = NULL;
if (conn->mode < IEEE80211_CONN_MODE_EHT)
return;
if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW)
return;
chanreq->ap = *ap_chandef;
}
static struct ieee802_11_elems *
ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata,
struct ieee80211_conn_settings *conn,
struct cfg80211_bss *cbss, int link_id,
struct ieee80211_chan_req *chanreq,
struct cfg80211_chan_def *ap_chandef)
{
const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies);
struct ieee80211_bss *bss = (void *)cbss->priv;
struct ieee80211_channel *channel = cbss->channel;
struct ieee80211_elems_parse_params parse_params = {
.link_id = -1,
.from_ap = true,
.start = ies->data,
.len = ies->len,
};
struct ieee802_11_elems *elems;
struct ieee80211_supported_band *sband;
enum ieee80211_conn_mode ap_mode;
int ret;
again:
parse_params.mode = conn->mode;
elems = ieee802_11_parse_elems_full(&parse_params);
if (!elems)
return ERR_PTR(-ENOMEM);
ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info,
elems, false, conn, ap_chandef);
/* this should be impossible since parsing depends on our mode */
if (WARN_ON(ap_mode > conn->mode)) {
ret = -EINVAL;
goto free;
}
if (conn->mode != ap_mode) {
conn->mode = ap_mode;
kfree(elems);
goto again;
}
mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n",
cbss->bssid, ieee80211_conn_mode_str(ap_mode));
sband = sdata->local->hw.wiphy->bands[channel->band];
switch (channel->band) {
case NL80211_BAND_S1GHZ:
if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) {
ret = -EINVAL;
goto free;
}
return elems;
case NL80211_BAND_6GHZ:
if (ap_mode < IEEE80211_CONN_MODE_HE) {
sdata_info(sdata,
"Rejecting non-HE 6/7 GHz connection");
ret = -EINVAL;
goto free;
}
break;
default:
if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) {
ret = -EINVAL;
goto free;
}
}
switch (ap_mode) {
case IEEE80211_CONN_MODE_S1G:
WARN_ON(1);
ret = -EINVAL;
goto free;
case IEEE80211_CONN_MODE_LEGACY:
conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
break;
case IEEE80211_CONN_MODE_HT:
conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
conn->bw_limit,
IEEE80211_CONN_BW_LIMIT_40);
break;
case IEEE80211_CONN_MODE_VHT:
case IEEE80211_CONN_MODE_HE:
conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
conn->bw_limit,
IEEE80211_CONN_BW_LIMIT_160);
break;
case IEEE80211_CONN_MODE_EHT:
conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
conn->bw_limit,
IEEE80211_CONN_BW_LIMIT_320);
break;
}
chanreq->oper = *ap_chandef;
ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef);
while (!ieee80211_chandef_usable(sdata, &chanreq->oper,
IEEE80211_CHAN_DISABLED)) {
if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) {
ret = -EINVAL;
goto free;
}
ieee80211_chanreq_downgrade(chanreq, conn);
}
if (conn->mode >= IEEE80211_CONN_MODE_HE &&
!cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper,
IEEE80211_CHAN_NO_HE)) {
conn->mode = IEEE80211_CONN_MODE_VHT;
conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
conn->bw_limit,
IEEE80211_CONN_BW_LIMIT_160);
}
if (conn->mode >= IEEE80211_CONN_MODE_EHT &&
!cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper,
IEEE80211_CHAN_NO_EHT)) {
conn->mode = IEEE80211_CONN_MODE_HE;
conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
conn->bw_limit,
IEEE80211_CONN_BW_LIMIT_160);
}
if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode)
sdata_info(sdata,
"regulatory prevented using AP config, downgraded\n");
if (conn->mode >= IEEE80211_CONN_MODE_HE &&
(!ieee80211_verify_peer_he_mcs_support(sdata, (void *)elems->he_cap,
elems->he_operation) ||
!ieee80211_verify_sta_he_mcs_support(sdata, sband,
elems->he_operation))) {
conn->mode = IEEE80211_CONN_MODE_VHT;
sdata_info(sdata, "required MCSes not supported, disabling HE\n");
}
if (conn->mode >= IEEE80211_CONN_MODE_EHT &&
!ieee80211_verify_sta_eht_mcs_support(sdata, sband,
elems->eht_operation)) {
conn->mode = IEEE80211_CONN_MODE_HE;
conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
conn->bw_limit,
IEEE80211_CONN_BW_LIMIT_160);
sdata_info(sdata, "required MCSes not supported, disabling EHT\n");
}
/* the mode can only decrease, so this must terminate */
if (ap_mode != conn->mode) {
kfree(elems);
goto again;
}
mlme_link_id_dbg(sdata, link_id,
"connecting with %s mode, max bandwidth %d MHz\n",
ieee80211_conn_mode_str(conn->mode),
20 * (1 << conn->bw_limit));
if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) {
ret = -EINVAL;
goto free;
}
return elems;
free:
kfree(elems);
return ERR_PTR(ret);
}
static int ieee80211_config_bw(struct ieee80211_link_data *link,
struct ieee802_11_elems *elems,
bool update, u64 *changed)
{
struct ieee80211_channel *channel = link->conf->chanreq.oper.chan;
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_chan_req chanreq = {};
struct cfg80211_chan_def ap_chandef;
enum ieee80211_conn_mode ap_mode;
u32 vht_cap_info = 0;
u16 ht_opmode;
int ret;
/* don't track any bandwidth changes in legacy/S1G modes */
if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY ||
link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G)
return 0;
if (elems->vht_cap_elem)
vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info);
ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info,
elems, true, &link->u.mgd.conn,
&ap_chandef);
if (ap_mode != link->u.mgd.conn.mode) {
link_info(link,
"AP appears to change mode (expected %s, found %s), disconnect\n",
ieee80211_conn_mode_str(link->u.mgd.conn.mode),
ieee80211_conn_mode_str(ap_mode));
return -EINVAL;
}
chanreq.oper = ap_chandef;
ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn,
&ap_chandef);
/*
* if HT operation mode changed store the new one -
* this may be applicable even if channel is identical
*/
if (elems->ht_operation) {
ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode);
if (link->conf->ht_operation_mode != ht_opmode) {
*changed |= BSS_CHANGED_HT;
link->conf->ht_operation_mode = ht_opmode;
}
}
/*
* Downgrade the new channel if we associated with restricted
* bandwidth 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.
*/
while (link->u.mgd.conn.bw_limit <
ieee80211_min_bw_limit_from_chandef(&chanreq.oper))
ieee80211_chandef_downgrade(&chanreq.oper, NULL);
if (ap_chandef.chan->band == NL80211_BAND_6GHZ &&
link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) {
ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef,
&chanreq.oper);
if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) {
link->conf->tpe = elems->tpe;
*changed |= BSS_CHANGED_TPE;
}
}
if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq))
return 0;
link_info(link,
"AP %pM changed bandwidth, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n",
link->u.mgd.bssid, chanreq.oper.chan->center_freq,
chanreq.oper.chan->freq_offset, chanreq.oper.width,
chanreq.oper.center_freq1, chanreq.oper.freq1_offset,
chanreq.oper.center_freq2);
if (!cfg80211_chandef_valid(&chanreq.oper)) {
sdata_info(sdata,
"AP %pM changed caps/bw in a way we can't support - disconnect\n",
link->u.mgd.bssid);
return -EINVAL;
}
if (!update) {
link->conf->chanreq = chanreq;
return 0;
}
/*
* We're tracking the current AP here, so don't do any further checks
* here. 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)
* - we detect an unsupported channel and disconnect
* - 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.
*/
ret = ieee80211_link_change_chanreq(link, &chanreq, changed);
if (ret) {
sdata_info(sdata,
"AP %pM changed bandwidth to incompatible one - disconnect\n",
link->u.mgd.bssid);
return ret;
}
cfg80211_schedule_channels_check(&sdata->wdev);
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,
const struct ieee80211_conn_settings *conn)
{
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->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) {
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,
const struct ieee80211_conn_settings *conn)
{
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->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) {
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(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;
}
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)
{
u32 rates;
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)...
*/
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 = ~0;
}
ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates,
WLAN_EID_SUPP_RATES);
ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates,
WLAN_EID_EXT_SUPP_RATES);
}
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.mode >= IEEE80211_CONN_MODE_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);
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.mode >= IEEE80211_CONN_MODE_VHT &&
sband->vht_cap.vht_supported) {
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);
if (link)
link->conf->mu_mimo_owner = mu_mimo_owner;
ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY);
}
/* 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.mode >= IEEE80211_CONN_MODE_HE) {
ieee80211_put_he_cap(skb, sdata, sband,
&assoc_data->link[link_id].conn);
ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY);
ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode);
}
/*
* 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.mode >= IEEE80211_CONN_MODE_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.mode >= IEEE80211_CONN_MODE_EHT)
ieee80211_put_eht_cap(skb, sdata, sband,
&assoc_data->link[link_id].conn);
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);
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 (!ieee80211_vif_is_mld(&sdata->vif))
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));
}
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_MLE_SUBELEM_FRAGMENT);
}
ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT);
}
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 = 0, 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);
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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 (ieee80211_vif_is_mld(&sdata->vif)) {
/* 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.mode >= IEEE80211_CONN_MODE_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);
/*
* This bit is technically reserved, so it shouldn't matter for either
* the AP or us, but it also means we shouldn't set it. However, we've
* always set it in the past, and apparently some EHT APs check that
* we don't set it. To avoid interoperability issues with old APs that
* for some reason check it and want it to be set, set the bit for all
* pre-EHT connections as we used to do.
*/
if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT)
capab |= WLAN_CAPABILITY_ESS;
/* 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;
info.link_id = assoc_data->assoc_link_id;
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_csa_switch_work(struct wiphy *wiphy,
struct wiphy_work *work)
{
struct ieee80211_link_data *link =
container_of(work, struct ieee80211_link_data,
u.mgd.csa.switch_work.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;
lockdep_assert_wiphy(local->hw.wiphy);
if (!ifmgd->associated)
return;
if (!link->conf->csa_active)
return;
/*
* If the link isn't active (now), we cannot wait for beacons, won't
* have a reserved chanctx, etc. Just switch over the chandef and
* update cfg80211 directly.
*/
if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) {
link->conf->chanreq = link->csa.chanreq;
cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper,
link->link_id);
return;
}
/*
* 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)
return;
ret = ieee80211_link_use_reserved_context(link);
if (ret) {
link_info(link,
"failed to use reserved channel context, disconnecting (err=%d)\n",
ret);
wiphy_work_queue(sdata->local->hw.wiphy,
&ifmgd->csa_connection_drop_work);
}
return;
}
if (!ieee80211_chanreq_identical(&link->conf->chanreq,
&link->csa.chanreq)) {
link_info(link,
"failed to finalize channel switch, disconnecting\n");
wiphy_work_queue(sdata->local->hw.wiphy,
&ifmgd->csa_connection_drop_work);
return;
}
link->u.mgd.csa.waiting_bcn = true;
/* apply new TPE restrictions immediately on the new channel */
if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ &&
link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) {
ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe,
&link->u.mgd.csa.ap_chandef,
&link->conf->chanreq.oper);
if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe,
sizeof(link->u.mgd.csa.tpe))) {
link->conf->tpe = link->u.mgd.csa.tpe;
ieee80211_link_info_change_notify(sdata, link,
BSS_CHANGED_TPE);
}
}
ieee80211_sta_reset_beacon_monitor(sdata);
ieee80211_sta_reset_conn_monitor(sdata);
}
static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
int ret;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
WARN_ON(!link->conf->csa_active);
ieee80211_vif_unblock_queues_csa(sdata);
link->conf->csa_active = false;
link->u.mgd.csa.blocked_tx = false;
link->u.mgd.csa.waiting_bcn = false;
ret = drv_post_channel_switch(link);
if (ret) {
link_info(link,
"driver post channel switch failed, disconnecting\n");
wiphy_work_queue(sdata->local->hw.wiphy,
&ifmgd->csa_connection_drop_work);
return;
}
cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper,
link->link_id);
}
void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success,
unsigned int link_id)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
trace_api_chswitch_done(sdata, success, link_id);
rcu_read_lock();
if (!success) {
sdata_info(sdata,
"driver channel switch failed (link %d), disconnecting\n",
link_id);
wiphy_work_queue(sdata->local->hw.wiphy,
&sdata->u.mgd.csa_connection_drop_work);
} else {
struct ieee80211_link_data *link =
rcu_dereference(sdata->link[link_id]);
if (WARN_ON(!link)) {
rcu_read_unlock();
return;
}
wiphy_delayed_work_queue(sdata->local->hw.wiphy,
&link->u.mgd.csa.switch_work, 0);
}
rcu_read_unlock();
}
EXPORT_SYMBOL(ieee80211_chswitch_done);
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;
lockdep_assert_wiphy(local->hw.wiphy);
if (!local->ops->abort_channel_switch)
return;
ieee80211_link_unreserve_chanctx(link);
ieee80211_vif_unblock_queues_csa(sdata);
link->conf->csa_active = false;
link->u.mgd.csa.blocked_tx = false;
drv_abort_channel_switch(link);
}
struct sta_csa_rnr_iter_data {
struct ieee80211_link_data *link;
struct ieee80211_channel *chan;
u8 mld_id;
};
static enum cfg80211_rnr_iter_ret
ieee80211_sta_csa_rnr_iter(void *_data, u8 type,
const struct ieee80211_neighbor_ap_info *info,
const u8 *tbtt_info, u8 tbtt_info_len)
{
struct sta_csa_rnr_iter_data *data = _data;
struct ieee80211_link_data *link = data->link;
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
const struct ieee80211_tbtt_info_ge_11 *ti;
enum nl80211_band band;
unsigned int center_freq;
int link_id;
if (type != IEEE80211_TBTT_INFO_TYPE_TBTT)
return RNR_ITER_CONTINUE;
if (tbtt_info_len < sizeof(*ti))
return RNR_ITER_CONTINUE;
ti = (const void *)tbtt_info;
if (ti->mld_params.mld_id != data->mld_id)
return RNR_ITER_CONTINUE;
link_id = le16_get_bits(ti->mld_params.params,
IEEE80211_RNR_MLD_PARAMS_LINK_ID);
if (link_id != data->link->link_id)
return RNR_ITER_CONTINUE;
/* we found the entry for our link! */
/* this AP is confused, it had this right before ... just disconnect */
if (!ieee80211_operating_class_to_band(info->op_class, &band)) {
link_info(link,
"AP now has invalid operating class in RNR, disconnect\n");
wiphy_work_queue(sdata->local->hw.wiphy,
&ifmgd->csa_connection_drop_work);
return RNR_ITER_BREAK;
}
center_freq = ieee80211_channel_to_frequency(info->channel, band);
data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq);
return RNR_ITER_BREAK;
}
static void
ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link,
struct ieee802_11_elems *elems)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct sta_csa_rnr_iter_data data = {
.link = link,
};
/*
* If we get here, we see a beacon from another link without
* CSA still being reported for it, so now we have to check
* if the CSA was aborted or completed. This may not even be
* perfectly possible if the CSA was only done for changing
* the puncturing, but in that case if the link in inactive
* we don't really care, and if it's an active link (or when
* it's activated later) we'll get a beacon and adjust.
*/
if (WARN_ON(!elems->ml_basic))
return;
data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic);
/*
* So in order to do this, iterate the RNR element(s) and see
* what channel is reported now.
*/
cfg80211_iter_rnr(elems->ie_start, elems->total_len,
ieee80211_sta_csa_rnr_iter, &data);
if (!data.chan) {
link_info(link,
"couldn't find (valid) channel in RNR for CSA, disconnect\n");
wiphy_work_queue(sdata->local->hw.wiphy,
&ifmgd->csa_connection_drop_work);
return;
}
/*
* If it doesn't match the CSA, then assume it aborted. This
* may erroneously detect that it was _not_ aborted when it
* was in fact aborted, but only changed the bandwidth or the
* puncturing configuration, but we don't have enough data to
* detect that.
*/
if (data.chan != link->csa.chanreq.oper.chan)
ieee80211_sta_abort_chanswitch(link);
}
enum ieee80211_csa_source {
IEEE80211_CSA_SOURCE_BEACON,
IEEE80211_CSA_SOURCE_OTHER_LINK,
IEEE80211_CSA_SOURCE_PROT_ACTION,
IEEE80211_CSA_SOURCE_UNPROT_ACTION,
};
static void
ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
u64 timestamp, u32 device_timestamp,
struct ieee802_11_elems *full_elems,
struct ieee802_11_elems *csa_elems,
enum ieee80211_csa_source source)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_chanctx *chanctx = NULL;
struct ieee80211_chanctx_conf *conf;
struct ieee80211_csa_ie csa_ie = {};
struct ieee80211_channel_switch ch_switch = {
.link_id = link->link_id,
.timestamp = timestamp,
.device_timestamp = device_timestamp,
};
unsigned long now;
int res;
lockdep_assert_wiphy(local->hw.wiphy);
if (csa_elems) {
struct cfg80211_bss *cbss = link->conf->bss;
enum nl80211_band current_band;
struct ieee80211_bss *bss;
if (WARN_ON(!cbss))
return;
current_band = cbss->channel->band;
bss = (void *)cbss->priv;
res = ieee80211_parse_ch_switch_ie(sdata, csa_elems,
current_band,
bss->vht_cap_info,
&link->u.mgd.conn,
link->u.mgd.bssid,
source == IEEE80211_CSA_SOURCE_UNPROT_ACTION,
&csa_ie);
if (res == 0) {
ch_switch.block_tx = csa_ie.mode;
ch_switch.chandef = csa_ie.chanreq.oper;
ch_switch.count = csa_ie.count;
ch_switch.delay = csa_ie.max_switch_time;
}
link->u.mgd.csa.tpe = csa_elems->csa_tpe;
} else {
/*
* If there was no per-STA profile for this link, we
* get called with csa_elems == NULL. This of course means
* there are no CSA elements, so set res=1 indicating
* no more CSA.
*/
res = 1;
}
if (res < 0) {
/* ignore this case, not a protected frame */
if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION)
return;
goto drop_connection;
}
if (link->conf->csa_active) {
switch (source) {
case IEEE80211_CSA_SOURCE_PROT_ACTION:
case IEEE80211_CSA_SOURCE_UNPROT_ACTION:
/* already processing - disregard action frames */
return;
case IEEE80211_CSA_SOURCE_BEACON:
if (link->u.mgd.csa.waiting_bcn) {
ieee80211_chswitch_post_beacon(link);
/*
* If the CSA is still present after the switch
* we need to consider it as a new CSA (possibly
* to self). This happens by not returning here
* so we'll get to the check below.
*/
} else if (res) {
ieee80211_sta_abort_chanswitch(link);
return;
} else {
drv_channel_switch_rx_beacon(sdata, &ch_switch);
return;
}
break;
case IEEE80211_CSA_SOURCE_OTHER_LINK:
/* active link: we want to see the beacon to continue */
if (ieee80211_vif_link_active(&sdata->vif,
link->link_id))
return;
/* switch work ran, so just complete the process */
if (link->u.mgd.csa.waiting_bcn) {
ieee80211_chswitch_post_beacon(link);
/*
* If the CSA is still present after the switch
* we need to consider it as a new CSA (possibly
* to self). This happens by not returning here
* so we'll get to the check below.
*/
break;
}
/* link still has CSA but we already know, do nothing */
if (!res)
return;
/* check in the RNR if the CSA aborted */
ieee80211_sta_other_link_csa_disappeared(link,
full_elems);
return;
}
}
/* no active CSA nor a new one */
if (res) {
/*
* However, we may have stopped queues when receiving a public
* action frame that couldn't be protected, if it had the quiet
* bit set. This is a trade-off, we want to be quiet as soon as
* possible, but also don't trust the public action frame much,
* as it can't be protected.
*/
if (unlikely(link->u.mgd.csa.blocked_tx)) {
link->u.mgd.csa.blocked_tx = false;
ieee80211_vif_unblock_queues_csa(sdata);
}
return;
}
/*
* We don't really trust public action frames, but block queues (go to
* quiet mode) for them anyway, we should get a beacon soon to either
* know what the CSA really is, or figure out the public action frame
* was actually an attack.
*/
if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) {
if (csa_ie.mode) {
link->u.mgd.csa.blocked_tx = true;
ieee80211_vif_block_queues_csa(sdata);
}
return;
}
if (link->conf->chanreq.oper.chan->band !=
csa_ie.chanreq.oper.chan->band) {
link_info(link,
"AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
link->u.mgd.bssid,
csa_ie.chanreq.oper.chan->center_freq,
csa_ie.chanreq.oper.width,
csa_ie.chanreq.oper.center_freq1,
csa_ie.chanreq.oper.center_freq2);
goto drop_connection;
}
if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper,
IEEE80211_CHAN_DISABLED)) {
link_info(link,
"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.chanreq.oper.chan->center_freq,
csa_ie.chanreq.oper.chan->freq_offset,
csa_ie.chanreq.oper.width,
csa_ie.chanreq.oper.center_freq1,
csa_ie.chanreq.oper.freq1_offset,
csa_ie.chanreq.oper.center_freq2);
goto drop_connection;
}
if (cfg80211_chandef_identical(&csa_ie.chanreq.oper,
&link->conf->chanreq.oper) &&
(!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) {
if (link->u.mgd.csa.ignored_same_chan)
return;
link_info(link,
"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 on the affected link - 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(link);
conf = rcu_dereference_protected(link->conf->chanctx_conf,
lockdep_is_held(&local->hw.wiphy->mtx));
if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) {
link_info(link,
"no channel context assigned to vif?, disconnecting\n");
goto drop_connection;
}
if (conf)
chanctx = container_of(conf, struct ieee80211_chanctx, conf);
if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
link_info(link,
"driver doesn't support chan-switch with channel contexts\n");
goto drop_connection;
}
if (drv_pre_channel_switch(sdata, &ch_switch)) {
link_info(link,
"preparing for channel switch failed, disconnecting\n");
goto drop_connection;
}
link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap;
link->csa.chanreq.oper = csa_ie.chanreq.oper;
ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn,
&csa_ie.chanreq.ap);
if (chanctx) {
res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq,
chanctx->mode, false);
if (res) {
link_info(link,
"failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
res);
goto drop_connection;
}
}
link->conf->csa_active = true;
link->u.mgd.csa.ignored_same_chan = false;
link->u.mgd.beacon_crc_valid = false;
link->u.mgd.csa.blocked_tx = csa_ie.mode;
if (csa_ie.mode)
ieee80211_vif_block_queues_csa(sdata);
cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper,
link->link_id, csa_ie.count,
csa_ie.mode);
/* we may have to handle timeout for deactivated link in software */
now = jiffies;
link->u.mgd.csa.time = now +
TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) *
link->conf->beacon_int);
if (ieee80211_vif_link_active(&sdata->vif, link->link_id) &&
local->ops->channel_switch) {
/*
* Use driver's channel switch callback, the driver will
* later call ieee80211_chswitch_done(). It may deactivate
* the link as well, we handle that elsewhere and queue
* the csa.switch_work for the calculated time then.
*/
drv_channel_switch(local, sdata, &ch_switch);
return;
}
/* channel switch handled in software */
wiphy_delayed_work_queue(local->hw.wiphy,
&link->u.mgd.csa.switch_work,
link->u.mgd.csa.time - now);
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.
*/
link->conf->csa_active = true;
link->u.mgd.csa.blocked_tx = csa_ie.mode;
sdata->csa_blocked_queues =
csa_ie.mode && !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA);
wiphy_work_queue(sdata->local->hw.wiphy,
&ifmgd->csa_connection_drop_work);
}
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 u64 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);
wiphy_work_cancel(local->hw.wiphy,
&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 wiphy *wiphy,
struct wiphy_work *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 wiphy *wiphy,
struct wiphy_work *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);
wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work);
}
void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work)
{
struct ieee80211_link_data *link =
container_of(work, struct ieee80211_link_data,
dfs_cac_timer_work.work);
struct cfg80211_chan_def chandef = link->conf->chanreq.oper;
struct ieee80211_sub_if_data *sdata = link->sdata;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
if (sdata->wdev.links[link->link_id].cac_started) {
ieee80211_link_release_channel(link);
cfg80211_cac_event(sdata->dev, &chandef,
NL80211_RADAR_CAC_FINISHED,
GFP_KERNEL, link->link_id);
}
}
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;
wiphy_delayed_work_queue(local->hw.wiphy,
&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 wiphy *wiphy,
struct wiphy_work *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) {
link_info(link,
"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) {
link_info(link,
"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) {
link_info(link,
"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_wiphy(sdata->local->hw.wiphy);
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)
{
lockdep_assert_wiphy(sdata->local->hw.wiphy);
__ieee80211_stop_poll(sdata);
}
static u64 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;
u64 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 u64 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;
u64 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->conf->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) {
bss_conf->beacon_rate = bss->beacon_rate;
changed |= BSS_CHANGED_BEACON_INFO;
} else {
bss_conf->beacon_rate = NULL;
}
/* 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;
lockdep_assert_wiphy(local->hw.wiphy);
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 ||
assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
continue;
if (ieee80211_vif_is_mld(&sdata->vif) &&
!(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id)))
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 (ieee80211_vif_is_mld(&sdata->vif)) {
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 ||
!(BIT(link_id) &
ieee80211_vif_usable_links(&sdata->vif)) ||
assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
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]);
}
ieee80211_recalc_ps(local);
/* leave this here to not change ordering in non-MLO cases */
if (!ieee80211_vif_is_mld(&sdata->vif))
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;
u64 changed = 0;
struct ieee80211_prep_tx_info info = {
.subtype = stype,
.was_assoc = true,
.link_id = ffs(sdata->vif.active_links) - 1,
};
lockdep_assert_wiphy(local->hw.wiphy);
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.conf->bss = NULL;
sdata->deflink.smps_mode = IEEE80211_SMPS_OFF;
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) {
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, -1);
/* finally reset all BSS / config parameters */
if (!ieee80211_vif_is_mld(&sdata->vif))
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 (!ieee80211_vif_is_mld(&sdata->vif))
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);
wiphy_work_cancel(local->hw.wiphy, &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 (!ieee80211_vif_is_mld(&sdata->vif)) {
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);
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;
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.blocked_tx = false;
sdata->deflink.u.mgd.csa.waiting_bcn = false;
sdata->deflink.u.mgd.csa.ignored_same_chan = false;
ieee80211_vif_unblock_queues_csa(sdata);
/* existing TX TSPEC sessions no longer exist */
memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk);
sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP;
sdata->vif.bss_conf.pwr_reduction = 0;
ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe);
sdata->vif.cfg.eml_cap = 0;
sdata->vif.cfg.eml_med_sync_delay = 0;
sdata->vif.cfg.mld_capa_op = 0;
memset(&sdata->u.mgd.ttlm_info, 0,
sizeof(sdata->u.mgd.ttlm_info));
wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work);
memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm));
wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
&ifmgd->neg_ttlm_timeout_work);
sdata->u.mgd.removed_links = 0;
wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
&sdata->u.mgd.ml_reconf_work);
wiphy_work_cancel(sdata->local->hw.wiphy,
&ifmgd->teardown_ttlm_work);
ieee80211_vif_set_links(sdata, 0, 0);
ifmgd->mcast_seq_last = IEEE80211_SN_MODULO;
}
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;
lockdep_assert_wiphy(local->hw.wiphy);
if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
return;
__ieee80211_stop_poll(sdata);
ieee80211_recalc_ps(local);
if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
return;
/*
* 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));
}
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;
wiphy_delayed_work_queue(sdata->local->hw.wiphy,
&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;
wiphy_delayed_work_queue(sdata->local->hw.wiphy,
&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;
wiphy_work_queue(sdata->local->hw.wiphy, &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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif)))
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) {
sta = sta_info_get(sdata, dst);
if (!WARN_ON(!sta))
ieee80211_check_fast_rx(sta);
}
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.conf->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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif)))
return;
if (!ieee80211_sdata_running(sdata))
return;
if (!ifmgd->associated)
return;
if (sdata->local->tmp_channel || sdata->local->scanning)
return;
if (sdata->local->suspending) {
/* reschedule after resume */
ieee80211_reset_ap_probe(sdata);
return;
}
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;
if (already)
return;
ieee80211_recalc_ps(sdata->local);
ifmgd->probe_send_count = 0;
ieee80211_mgd_probe_ap_send(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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
ieee80211_vif_is_mld(&sdata->vif)))
return NULL;
if (ifmgd->associated)
cbss = sdata->deflink.conf->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 = false;
lockdep_assert_wiphy(local->hw.wiphy);
if (!ifmgd->associated)
return;
/* only transmit if we have a link that makes that worthwhile */
for (unsigned int link_id = 0;
link_id < ARRAY_SIZE(sdata->link);
link_id++) {
struct ieee80211_link_data *link;
if (!ieee80211_vif_link_active(&sdata->vif, link_id))
continue;
link = sdata_dereference(sdata->link[link_id], sdata);
if (WARN_ON_ONCE(!link))
continue;
if (link->u.mgd.csa.blocked_tx)
continue;
tx = true;
break;
}
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->conf->bss);
link->conf->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);
/* the other links will be destroyed */
sdata->vif.bss_conf.csa_active = false;
sdata->deflink.u.mgd.csa.waiting_bcn = false;
sdata->deflink.u.mgd.csa.blocked_tx = false;
ieee80211_vif_unblock_queues_csa(sdata);
ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
ifmgd->reconnect);
ifmgd->reconnect = false;
}
static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy,
struct wiphy_work *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 wiphy *wiphy,
struct wiphy_work *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;
wiphy_work_queue(hw->wiphy, &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;
wiphy_work_queue(hw->wiphy, &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;
wiphy_work_queue(hw->wiphy, &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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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 */
eth_zero_addr(sdata->deflink.u.mgd.bssid);
ieee80211_link_info_change_notify(sdata, &sdata->deflink,
BSS_CHANGED_BSSID);
sdata->u.mgd.flags = 0;
ieee80211_link_release_channel(&sdata->deflink);
ieee80211_vif_set_links(sdata, 0, 0);
}
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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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);
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 (ieee80211_vif_is_mld(&sdata->vif))
data.ap_mld_addr = assoc_data->ap_addr;
cfg80211_assoc_failure(sdata->dev, &data);
}
ieee80211_link_release_channel(&sdata->deflink);
ieee80211_vif_set_links(sdata, 0, 0);
}
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,
.link_id = auth_data->link_id,
};
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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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 */
sta = sta_info_get(sdata, ap_addr);
if (!sta) {
WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr);
return false;
}
if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
sdata_info(sdata, "failed moving %pM to auth\n", ap_addr);
return false;
}
return true;
}
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,
};
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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);
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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 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) > 110)
*have_higher_than_11mbit = true;
/*
* Skip HT, VHT, HE, EHT 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_EHT_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, 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(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
const struct link_sta_info *link_sta,
const struct ieee802_11_elems *elems)
{
const struct ieee80211_sta_he_cap *own_he_cap =
ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
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 &&
own_he_cap &&
(own_he_cap->he_cap_elem.mac_cap_info[0] &
IEEE80211_HE_MAC_CAP0_TWT_REQ);
}
static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
struct ieee80211_link_data *link,
struct link_sta_info *link_sta,
struct ieee802_11_elems *elems)
{
bool twt = ieee80211_twt_req_supported(sdata, sband, 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_vif(sband, &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;
unsigned int link_id = link->link_id;
struct ieee80211_elems_parse_params parse_params = {
.mode = link->u.mgd.conn.mode,
.start = elem_start,
.len = elem_len,
.link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id,
.from_ap = true,
};
bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
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;
const __le16 prof_bss_param_ch_present =
cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT);
u16 capab_info;
bool ret;
elems = ieee802_11_parse_elems_full(&parse_params);
if (!elems)
return false;
if (link_id == assoc_data->assoc_link_id) {
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
/*
* we should not get to this flow unless the association was
* successful, so set the status directly to success
*/
assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS;
if (elems->ml_basic) {
int bss_param_ch_cnt =
ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic);
if (bss_param_ch_cnt < 0) {
ret = false;
goto out;
}
link->u.mgd.bss_param_ch_cnt = bss_param_ch_cnt;
}
} else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC ||
!elems->prof ||
!(elems->prof->control & prof_bss_param_ch_present)) {
ret = false;
goto out;
} else {
const u8 *ptr = elems->prof->variable +
elems->prof->sta_info_len - 1;
/*
* During parsing, we validated that these fields exist,
* otherwise elems->prof would have been set to NULL.
*/
capab_info = get_unaligned_le16(ptr);
assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2);
link->u.mgd.bss_param_ch_cnt =
ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof);
if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) {
link_info(link, "association response status code=%u\n",
assoc_data->link[link_id].status);
ret = true;
goto out;
}
}
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.mode >= IEEE80211_CONN_MODE_HT &&
(!elems->ht_cap_elem || !elems->ht_operation)) ||
(is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_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;
parse_params.bss = cbss;
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.mode >= IEEE80211_CONN_MODE_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.mode >= IEEE80211_CONN_MODE_HT) {
elems->ht_operation = bss_elems->ht_operation;
sdata_info(sdata,
"AP bug: HT operation missing from AssocResp\n");
}
if (is_5ghz) {
if (!elems->vht_cap_elem && bss_elems->vht_cap_elem &&
link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_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.mode >= IEEE80211_CONN_MODE_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.
* Note that the ieee80211_config_bw() below would also check
* for this (and more), but this has better error reporting.
*/
if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_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_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT &&
(!elems->vht_cap_elem || !elems->vht_operation)) {
sdata_info(sdata,
"VHT AP is missing VHT capability/operation\n");
ret = false;
goto out;
}
/* check/update if AP changed anything in assoc response vs. scan */
if (ieee80211_config_bw(link, elems,
link_id == assoc_data->assoc_link_id,
changed)) {
ret = false;
goto out;
}
if (WARN_ON(!link->conf->chanreq.oper.chan)) {
ret = false;
goto out;
}
sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band];
/* Set up internal HT/VHT capabilities */
if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_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.mode >= IEEE80211_CONN_MODE_VHT) {
const struct ieee80211_vht_cap *bss_vht_cap = NULL;
const struct cfg80211_bss_ies *ies;
/*
* Cisco AP module 9115 with FW 17.3 has a bug and sends a
* too large maximum MPDU length in the association response
* (indicating 12k) that it cannot actually process ...
* Work around that.
*/
rcu_read_lock();
ies = rcu_dereference(cbss->ies);
if (ies) {
const struct element *elem;
elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY,
ies->data, ies->len);
if (elem && elem->datalen >= sizeof(*bss_vht_cap))
bss_vht_cap = (const void *)elem->data;
}
ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
elems->vht_cap_elem,
bss_vht_cap, link_sta);
rcu_read_unlock();
}
if (elems->he_operation &&
link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_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(sdata, sband, link,
link_sta, elems);
if (elems->eht_operation && elems->eht_cap &&
link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_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;
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);
/*
* 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.mode < IEEE80211_CONN_MODE_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.mode < IEEE80211_CONN_MODE_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.mode < IEEE80211_CONN_MODE_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 void
ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
struct cfg80211_assoc_request *req,
bool wmm_used, int link_id,
struct ieee80211_conn_settings *conn)
{
struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap;
bool is_5ghz = sband->band == NL80211_BAND_5GHZ;
bool is_6ghz = sband->band == NL80211_BAND_6GHZ;
const struct ieee80211_sta_he_cap *he_cap;
const struct ieee80211_sta_eht_cap *eht_cap;
struct ieee80211_sta_vht_cap vht_cap;
if (sband->band == NL80211_BAND_S1GHZ) {
conn->mode = IEEE80211_CONN_MODE_S1G;
conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
mlme_dbg(sdata, "operating as S1G STA\n");
return;
}
conn->mode = IEEE80211_CONN_MODE_LEGACY;
conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
if (req && req->flags & ASSOC_REQ_DISABLE_HT) {
mlme_link_id_dbg(sdata, link_id,
"HT disabled by flag, limiting to legacy\n");
goto out;
}
if (!wmm_used) {
mlme_link_id_dbg(sdata, link_id,
"WMM/QoS not supported, limiting to legacy\n");
goto out;
}
if (req) {
unsigned int i;
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) {
netdev_info(sdata->dev,
"WEP/TKIP use, limiting to legacy\n");
goto out;
}
}
}
if (!sta_ht_cap.ht_supported && !is_6ghz) {
mlme_link_id_dbg(sdata, link_id,
"HT not supported (and not on 6 GHz), limiting to legacy\n");
goto out;
}
/* HT is fine */
conn->mode = IEEE80211_CONN_MODE_HT;
conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
IEEE80211_CONN_BW_LIMIT_40 :
IEEE80211_CONN_BW_LIMIT_20;
memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
if (req && req->flags & ASSOC_REQ_DISABLE_VHT) {
mlme_link_id_dbg(sdata, link_id,
"VHT disabled by flag, limiting to HT\n");
goto out;
}
if (vht_cap.vht_supported && is_5ghz) {
bool have_80mhz = false;
unsigned int i;
if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) {
mlme_link_id_dbg(sdata, link_id,
"no 40 MHz support on 5 GHz, limiting to HT\n");
goto out;
}
/* Allow VHT if at least one channel on the sband supports 80 MHz */
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) {
mlme_link_id_dbg(sdata, link_id,
"no 80 MHz channel support on 5 GHz, limiting to HT\n");
goto out;
}
} else if (is_5ghz) { /* !vht_supported but on 5 GHz */
mlme_link_id_dbg(sdata, link_id,
"no VHT support on 5 GHz, limiting to HT\n");
goto out;
}
/* VHT - if we have - is fine, including 80 MHz, check 160 below again */
if (sband->band != NL80211_BAND_2GHZ) {
conn->mode = IEEE80211_CONN_MODE_VHT;
conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160;
}
if (is_5ghz &&
!(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ |
IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) {
conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
mlme_link_id_dbg(sdata, link_id,
"no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz");
}
if (req && req->flags & ASSOC_REQ_DISABLE_HE) {
mlme_link_id_dbg(sdata, link_id,
"HE disabled by flag, limiting to HT/VHT\n");
goto out;
}
he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
if (!he_cap) {
WARN_ON(is_6ghz);
mlme_link_id_dbg(sdata, link_id,
"no HE support, limiting to HT/VHT\n");
goto out;
}
/* so we have HE */
conn->mode = IEEE80211_CONN_MODE_HE;
/* check bandwidth */
switch (sband->band) {
default:
case NL80211_BAND_2GHZ:
if (he_cap->he_cap_elem.phy_cap_info[0] &
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)
break;
conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
mlme_link_id_dbg(sdata, link_id,
"no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n");
break;
case NL80211_BAND_5GHZ:
if (!(he_cap->he_cap_elem.phy_cap_info[0] &
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) {
conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
mlme_link_id_dbg(sdata, link_id,
"no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n");
break;
}
if (!(he_cap->he_cap_elem.phy_cap_info[0] &
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) {
conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
conn->bw_limit,
IEEE80211_CONN_BW_LIMIT_80);
mlme_link_id_dbg(sdata, link_id,
"no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n");
}
break;
case NL80211_BAND_6GHZ:
if (he_cap->he_cap_elem.phy_cap_info[0] &
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)
break;
conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
conn->bw_limit,
IEEE80211_CONN_BW_LIMIT_80);
mlme_link_id_dbg(sdata, link_id,
"no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n");
break;
}
if (req && req->flags & ASSOC_REQ_DISABLE_EHT) {
mlme_link_id_dbg(sdata, link_id,
"EHT disabled by flag, limiting to HE\n");
goto out;
}
eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
if (!eht_cap) {
mlme_link_id_dbg(sdata, link_id,
"no EHT support, limiting to HE\n");
goto out;
}
/* we have EHT */
conn->mode = IEEE80211_CONN_MODE_EHT;
/* check bandwidth */
if (is_6ghz &&
eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)
conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320;
else if (is_6ghz)
mlme_link_id_dbg(sdata, link_id,
"no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n");
out:
mlme_link_id_dbg(sdata, link_id,
"determined local STA to be %s, BW limited to %d MHz\n",
ieee80211_conn_mode_str(conn->mode),
20 * (1 << conn->bw_limit));
}
static void
ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
struct cfg80211_auth_request *req,
bool wmm_used,
struct ieee80211_conn_settings *conn)
{
ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used,
req->link_id > 0 ? req->link_id : 0,
conn);
}
static void
ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
struct cfg80211_assoc_request *req,
bool wmm_used, int link_id,
struct ieee80211_conn_settings *conn)
{
struct ieee80211_conn_settings tmp;
WARN_ON(!req);
ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id,
&tmp);
conn->mode = min_t(enum ieee80211_conn_mode,
conn->mode, tmp.mode);
conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
conn->bw_limit, tmp.bw_limit);
}
static enum ieee80211_ap_reg_power
ieee80211_ap_power_type(u8 control)
{
switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP:
return IEEE80211_REG_LPI_AP;
case IEEE80211_6GHZ_CTRL_REG_SP_AP:
case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP:
return IEEE80211_REG_SP_AP;
case IEEE80211_6GHZ_CTRL_REG_VLP_AP:
return IEEE80211_REG_VLP_AP;
default:
return IEEE80211_REG_UNSET_AP;
}
}
static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
struct ieee80211_link_data *link,
int link_id,
struct cfg80211_bss *cbss, bool mlo,
struct ieee80211_conn_settings *conn)
{
struct ieee80211_local *local = sdata->local;
bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
struct ieee80211_chan_req chanreq = {};
struct cfg80211_chan_def ap_chandef;
struct ieee802_11_elems *elems;
int ret;
lockdep_assert_wiphy(local->hw.wiphy);
rcu_read_lock();
elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id,
&chanreq, &ap_chandef);
if (IS_ERR(elems)) {
rcu_read_unlock();
return PTR_ERR(elems);
}
if (mlo && !elems->ml_basic) {
sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n");
rcu_read_unlock();
kfree(elems);
return -EINVAL;
}
if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) {
const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
if (elems->pwr_constr_elem)
link->conf->pwr_reduction = *elems->pwr_constr_elem;
he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation);
if (he_6ghz_oper)
link->conf->power_type =
ieee80211_ap_power_type(he_6ghz_oper->control);
else
link_info(link,
"HE 6 GHz operation missing (on %d MHz), expect issues\n",
cbss->channel->center_freq);
link->conf->tpe = elems->tpe;
ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef,
&chanreq.oper);
}
rcu_read_unlock();
/* the element data was RCU protected so no longer valid anyway */
kfree(elems);
elems = NULL;
if (!link)
return 0;
rcu_read_lock();
link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss),
local->rx_chains);
rcu_read_unlock();
/*
* 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, &chanreq,
IEEE80211_CHANCTX_SHARED);
/* don't downgrade for 5 and 10 MHz channels, though. */
if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 ||
chanreq.oper.width == NL80211_CHAN_WIDTH_10)
return ret;
while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) {
ieee80211_chanreq_downgrade(&chanreq, conn);
ret = ieee80211_link_use_channel(link, &chanreq,
IEEE80211_CHANCTX_SHARED);
}
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] = {};
u16 valid_links = 0, dormant_links = 0;
int err;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
/*
* 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;
sta->sta.spp_amsdu = assoc_data->spp_amsdu;
if (ieee80211_vif_is_mld(&sdata->vif)) {
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 (assoc_data->link[link_id].disabled)
dormant_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, dormant_links);
}
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;
struct link_sta_info *link_sta;
if (!cbss)
continue;
link = sdata_dereference(sdata->link[link_id], sdata);
if (WARN_ON(!link))
goto out_err;
if (ieee80211_vif_is_mld(&sdata->vif))
link_info(link,
"local address %pM, AP link address %pM%s\n",
link->conf->addr,
assoc_data->link[link_id].bss->bssid,
link_id == assoc_data->assoc_link_id ?
" (assoc)" : "");
link_sta = rcu_dereference_protected(sta->link[link_id],
lockdep_is_held(&local->hw.wiphy->mtx));
if (WARN_ON(!link_sta))
goto out_err;
if (!link->u.mgd.have_beacon) {
const struct cfg80211_bss_ies *ies;
rcu_read_lock();
ies = rcu_dereference(cbss->beacon_ies);
if (ies)
link->u.mgd.have_beacon = true;
else
ies = rcu_dereference(cbss->ies);
ieee80211_get_dtim(ies,
&link->conf->sync_dtim_count,
&link->u.mgd.dtim_period);
link->conf->beacon_int = cbss->beacon_interval;
rcu_read_unlock();
}
link->conf->dtim_period = link->u.mgd.dtim_period ?: 1;
if (link_id != assoc_data->assoc_link_id) {
link->u.mgd.conn = assoc_data->link[link_id].conn;
err = ieee80211_prep_channel(sdata, link, link_id, cbss,
true, &link->u.mgd.conn);
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 (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) {
valid_links &= ~BIT(link_id);
ieee80211_sta_remove_link(sta, link_id);
continue;
}
if (link_id != assoc_data->assoc_link_id) {
err = ieee80211_sta_activate_link(sta, link_id);
if (err)
goto out_err;
}
}
/* links might have changed due to rejected ones, set them again */
ieee80211_vif_set_links(sdata, valid_links, dormant_links);
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);
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);
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_data resp = {
.uapsd_queues = -1,
};
u8 ap_mld_addr[ETH_ALEN] __aligned(2);
unsigned int link_id;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
if (!assoc_data)
return;
parse_params.mode =
assoc_data->link[assoc_data->assoc_link_id].conn.mode;
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;
assoc_data->comeback = 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 (ieee80211_vif_is_mld(&sdata->vif)) {
struct ieee80211_mle_basic_common_info *common;
if (!elems->ml_basic) {
sdata_info(sdata,
"MLO association with %pM but no (basic) multi-link element in response!\n",
assoc_data->ap_addr);
goto abandon_assoc;
}
common = (void *)elems->ml_basic->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.eml_cap =
ieee80211_mle_get_eml_cap((const void *)elems->ml_basic);
sdata->vif.cfg.eml_med_sync_delay =
ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic);
sdata->vif.cfg.mld_capa_op =
ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic);
}
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;
if (!assoc_data->link[link_id].bss)
continue;
resp.links[link_id].bss = assoc_data->link[link_id].bss;
ether_addr_copy(resp.links[link_id].addr,
assoc_data->link[link_id].addr);
resp.links[link_id].status = assoc_data->link[link_id].status;
link = sdata_dereference(sdata->link[link_id], sdata);
if (!link)
continue;
/* 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 (ieee80211_vif_is_mld(&sdata->vif)) {
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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
/*
* 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_ml_reconf_work(struct wiphy *wiphy,
struct wiphy_work *work)
{
struct ieee80211_sub_if_data *sdata =
container_of(work, struct ieee80211_sub_if_data,
u.mgd.ml_reconf_work.work);
u16 new_valid_links, new_active_links, new_dormant_links;
int ret;
if (!sdata->u.mgd.removed_links)
return;
sdata_info(sdata,
"MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n",
sdata->vif.valid_links, sdata->u.mgd.removed_links);
new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links;
if (new_valid_links == sdata->vif.valid_links)
return;
if (!new_valid_links ||
!(new_valid_links & ~sdata->vif.dormant_links)) {
sdata_info(sdata, "No valid links after reconfiguration\n");
ret = -EINVAL;
goto out;
}
new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links;
if (new_active_links != sdata->vif.active_links) {
if (!new_active_links)
new_active_links =
BIT(ffs(new_valid_links &
~sdata->vif.dormant_links) - 1);
ret = ieee80211_set_active_links(&sdata->vif, new_active_links);
if (ret) {
sdata_info(sdata,
"Failed setting active links\n");
goto out;
}
}
new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links;
ret = ieee80211_vif_set_links(sdata, new_valid_links,
new_dormant_links);
if (ret)
sdata_info(sdata, "Failed setting valid links\n");
ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS);
out:
if (!ret)
cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links);
else
__ieee80211_disconnect(sdata);
sdata->u.mgd.removed_links = 0;
}
static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata,
struct ieee802_11_elems *elems)
{
const struct element *sub;
unsigned long removed_links = 0;
u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {};
u8 link_id;
u32 delay;
if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf)
return;
/* Directly parse the sub elements as the common information doesn't
* hold any useful information.
*/
for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf,
elems->ml_reconf_len) {
struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data;
u8 *pos = prof->variable;
u16 control;
if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE)
continue;
if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data,
sub->datalen))
return;
control = le16_to_cpu(prof->control);
link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID;
removed_links |= BIT(link_id);
/* the MAC address should not be included, but handle it */
if (control &
IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT)
pos += 6;
/* According to Draft P802.11be_D3.0, the control should
* include the AP Removal Timer present. If the AP Removal Timer
* is not present assume immediate removal.
*/
if (control &
IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT)
link_removal_timeout[link_id] = get_unaligned_le16(pos);
}
removed_links &= sdata->vif.valid_links;
if (!removed_links) {
/* In case the removal was cancelled, abort it */
if (sdata->u.mgd.removed_links) {
sdata->u.mgd.removed_links = 0;
wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
&sdata->u.mgd.ml_reconf_work);
}
return;
}
delay = 0;
for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) {
struct ieee80211_bss_conf *link_conf =
sdata_dereference(sdata->vif.link_conf[link_id], sdata);
u32 link_delay;
if (!link_conf) {
removed_links &= ~BIT(link_id);
continue;
}
if (link_removal_timeout[link_id] < 1)
link_delay = 0;
else
link_delay = link_conf->beacon_int *
(link_removal_timeout[link_id] - 1);
if (!delay)
delay = link_delay;
else
delay = min(delay, link_delay);
}
sdata->u.mgd.removed_links = removed_links;
wiphy_delayed_work_queue(sdata->local->hw.wiphy,
&sdata->u.mgd.ml_reconf_work,
TU_TO_JIFFIES(delay));
}
static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata,
u16 active_links, u16 dormant_links,
u16 suspended_links)
{
u64 changed = 0;
int ret;
if (!active_links) {
ret = -EINVAL;
goto out;
}
/* If there is an active negotiated TTLM, it should be discarded by
* the new negotiated/advertised TTLM.
*/
if (sdata->vif.neg_ttlm.valid) {
memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm));
sdata->vif.suspended_links = 0;
changed = BSS_CHANGED_MLD_TTLM;
}
if (sdata->vif.active_links != active_links) {
/* usable links are affected when active_links are changed,
* so notify the driver about the status change
*/
changed |= BSS_CHANGED_MLD_VALID_LINKS;
active_links &= sdata->vif.active_links;
if (!active_links)
active_links =
BIT(__ffs(sdata->vif.valid_links &
~dormant_links));
ret = ieee80211_set_active_links(&sdata->vif, active_links);
if (ret) {
sdata_info(sdata, "Failed to set TTLM active links\n");
goto out;
}
}
ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links,
dormant_links);
if (ret) {
sdata_info(sdata, "Failed to set TTLM dormant links\n");
goto out;
}
sdata->vif.suspended_links = suspended_links;
if (sdata->vif.suspended_links)
changed |= BSS_CHANGED_MLD_TTLM;
ieee80211_vif_cfg_change_notify(sdata, changed);
out:
if (ret)
ieee80211_disconnect(&sdata->vif, false);
return ret;
}
static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy,
struct wiphy_work *work)
{
u16 new_active_links, new_dormant_links;
struct ieee80211_sub_if_data *sdata =
container_of(work, struct ieee80211_sub_if_data,
u.mgd.ttlm_work.work);
new_active_links = sdata->u.mgd.ttlm_info.map &
sdata->vif.valid_links;
new_dormant_links = ~sdata->u.mgd.ttlm_info.map &
sdata->vif.valid_links;
ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0);
if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links,
0))
return;
sdata->u.mgd.ttlm_info.active = true;
sdata->u.mgd.ttlm_info.switch_time = 0;
}
static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data)
{
if (bm_size == 1)
return *data;
else
return get_unaligned_le16(data);
}
static int
ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata,
const struct ieee80211_ttlm_elem *ttlm,
struct ieee80211_adv_ttlm_info *ttlm_info)
{
/* The element size was already validated in
* ieee80211_tid_to_link_map_size_ok()
*/
u8 control, link_map_presence, map_size, tid;
u8 *pos;
memset(ttlm_info, 0, sizeof(*ttlm_info));
pos = (void *)ttlm->optional;
control = ttlm->control;
if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) ||
!(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT))
return 0;
if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) !=
IEEE80211_TTLM_DIRECTION_BOTH) {
sdata_info(sdata, "Invalid advertised T2L map direction\n");
return -EINVAL;
}
link_map_presence = *pos;
pos++;
ttlm_info->switch_time = get_unaligned_le16(pos);
/* Since ttlm_info->switch_time == 0 means no switch time, bump it
* by 1.
*/
if (!ttlm_info->switch_time)
ttlm_info->switch_time = 1;
pos += 2;
if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) {
ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16;
pos += 3;
}
if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE)
map_size = 1;
else
map_size = 2;
/* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall
* not advertise a TID-to-link mapping that does not map all TIDs to the
* same link set, reject frame if not all links have mapping
*/
if (link_map_presence != 0xff) {
sdata_info(sdata,
"Invalid advertised T2L mapping presence indicator\n");
return -EINVAL;
}
ttlm_info->map = ieee80211_get_ttlm(map_size, pos);
if (!ttlm_info->map) {
sdata_info(sdata,
"Invalid advertised T2L map for TID 0\n");
return -EINVAL;
}
pos += map_size;
for (tid = 1; tid < 8; tid++) {
u16 map = ieee80211_get_ttlm(map_size, pos);
if (map != ttlm_info->map) {
sdata_info(sdata, "Invalid advertised T2L map for tid %d\n",
tid);
return -EINVAL;
}
pos += map_size;
}
return 0;
}
static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata,
struct ieee802_11_elems *elems,
u64 beacon_ts)
{
u8 i;
int ret;
if (!ieee80211_vif_is_mld(&sdata->vif))
return;
if (!elems->ttlm_num) {
if (sdata->u.mgd.ttlm_info.switch_time) {
/* if a planned TID-to-link mapping was cancelled -
* abort it
*/
wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
&sdata->u.mgd.ttlm_work);
} else if (sdata->u.mgd.ttlm_info.active) {
/* if no TID-to-link element, set to default mapping in
* which all TIDs are mapped to all setup links
*/
ret = ieee80211_vif_set_links(sdata,
sdata->vif.valid_links,
0);
if (ret) {
sdata_info(sdata, "Failed setting valid/dormant links\n");
return;
}
ieee80211_vif_cfg_change_notify(sdata,
BSS_CHANGED_MLD_VALID_LINKS);
}
memset(&sdata->u.mgd.ttlm_info, 0,
sizeof(sdata->u.mgd.ttlm_info));
return;
}
for (i = 0; i < elems->ttlm_num; i++) {
struct ieee80211_adv_ttlm_info ttlm_info;
u32 res;
res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i],
&ttlm_info);
if (res) {
__ieee80211_disconnect(sdata);
return;
}
if (ttlm_info.switch_time) {
u16 beacon_ts_tu, st_tu, delay;
u32 delay_jiffies;
u64 mask;
/* The t2l map switch time is indicated with a partial
* TSF value (bits 10 to 25), get the partial beacon TS
* as well, and calc the delay to the start time.
*/
mask = GENMASK_ULL(25, 10);
beacon_ts_tu = (beacon_ts & mask) >> 10;
st_tu = ttlm_info.switch_time;
delay = st_tu - beacon_ts_tu;
/*
* If the switch time is far in the future, then it
* could also be the previous switch still being
* announced.
* We can simply ignore it for now, if it is a future
* switch the AP will continue to announce it anyway.
*/
if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW)
return;
delay_jiffies = TU_TO_JIFFIES(delay);
/* Link switching can take time, so schedule it
* 100ms before to be ready on time
*/
if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS)
delay_jiffies -=
IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS;
else
delay_jiffies = 0;
sdata->u.mgd.ttlm_info = ttlm_info;
wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
&sdata->u.mgd.ttlm_work);
wiphy_delayed_work_queue(sdata->local->hw.wiphy,
&sdata->u.mgd.ttlm_work,
delay_jiffies);
return;
}
}
}
static void
ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata,
int reporting_link_id,
struct ieee802_11_elems *elems)
{
const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {};
ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {};
const struct element *sub;
const u8 *subelems;
size_t subelems_len;
u8 common_size;
int link_id;
if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len))
return;
common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic);
subelems = (u8 *)elems->ml_basic + common_size;
subelems_len = elems->ml_basic_len - common_size;
for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE,
subelems, subelems_len) {
struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data;
struct ieee80211_link_data *link;
ssize_t len;
if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data,
sub->datalen))
continue;
link_id = le16_get_bits(prof->control,
IEEE80211_MLE_STA_CONTROL_LINK_ID);
/* need a valid link ID, but also not our own, both AP bugs */
if (link_id == reporting_link_id ||
link_id >= IEEE80211_MLD_MAX_NUM_LINKS)
continue;
link = sdata_dereference(sdata->link[link_id], sdata);
if (!link)
continue;
len = cfg80211_defragment_element(sub, subelems, subelems_len,
NULL, 0,
IEEE80211_MLE_SUBELEM_FRAGMENT);
if (WARN_ON(len < 0))
continue;
sta_profiles[link_id] = sub;
sta_profiles_len[link_id] = len;
}
for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
struct ieee80211_mle_per_sta_profile *prof;
struct ieee802_11_elems *prof_elems;
struct ieee80211_link_data *link;
ssize_t len;
if (link_id == reporting_link_id)
continue;
link = sdata_dereference(sdata->link[link_id], sdata);
if (!link)
continue;
if (!sta_profiles[link_id]) {
prof_elems = NULL;
goto handle;
}
/* we can defragment in-place, won't use the buffer again */
len = cfg80211_defragment_element(sta_profiles[link_id],
subelems, subelems_len,
(void *)sta_profiles[link_id],
sta_profiles_len[link_id],
IEEE80211_MLE_SUBELEM_FRAGMENT);
if (WARN_ON(len != sta_profiles_len[link_id]))
continue;
prof = (void *)sta_profiles[link_id];
prof_elems = ieee802_11_parse_elems(prof->variable +
(prof->sta_info_len - 1),
len -
(prof->sta_info_len - 1),
false, NULL);
/* memory allocation failed - let's hope that's transient */
if (!prof_elems)
continue;
handle:
/*
* FIXME: the timings here are obviously incorrect,
* but only older Intel drivers seem to care, and
* those don't have MLO. If you really need this,
* the problem is having to calculate it with the
* TSF offset etc. The device_timestamp is still
* correct, of course.
*/
ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems,
IEEE80211_CSA_SOURCE_OTHER_LINK);
kfree(prof_elems);
}
}
static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata,
const struct ieee802_11_elems *elems)
{
struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg;
static u8 zero_ssid[IEEE80211_MAX_SSID_LEN];
if (!elems->ssid)
return false;
/* hidden SSID: zero length */
if (elems->ssid_len == 0)
return false;
if (elems->ssid_len != cfg->ssid_len)
return true;
/* hidden SSID: zeroed out */
if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len))
return false;
return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len);
}
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 = link->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_supported_band *sband;
struct ieee80211_channel *chan;
struct link_sta_info *link_sta;
struct sta_info *sta;
u64 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 = {
.mode = link->u.mgd.conn.mode,
.link_id = -1,
.from_ap = true,
};
lockdep_assert_wiphy(local->hw.wiphy);
/* 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(bss_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(ieee80211_vif_is_mld(&sdata->vif)) &&
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) &&
!ieee80211_is_s1g_beacon(hdr->frame_control)) {
bss_conf->sync_tsf =
le64_to_cpu(mgmt->u.beacon.timestamp);
bss_conf->sync_device_ts =
rx_status->device_timestamp;
bss_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, bss_conf->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 = bss_conf->bss;
parse_params.filter = care_about_ies;
parse_params.crc = ncrc;
elems = ieee802_11_parse_elems_full(&parse_params);
if (!elems)
return;
if (rx_status->flag & RX_FLAG_DECRYPTED &&
ieee80211_mgd_ssid_mismatch(sdata, elems)) {
sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n",
sdata->vif.cfg.ap_addr);
__ieee80211_disconnect(sdata);
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;
}
}
/*
* 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)) {
bss_conf->sync_tsf =
le64_to_cpu(mgmt->u.beacon.timestamp);
bss_conf->sync_device_ts =
rx_status->device_timestamp;
bss_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, elems,
IEEE80211_CSA_SOURCE_BEACON);
/* note that after this elems->ml_basic can no longer be used fully */
ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems);
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;
ieee80211_recalc_ps(local);
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);
sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
if (WARN_ON(!sta)) {
goto free;
}
link_sta = rcu_dereference_protected(sta->link[link->link_id],
lockdep_is_held(&local->hw.wiphy->mtx));
if (WARN_ON(!link_sta)) {
goto free;
}
if (WARN_ON(!bss_conf->chanreq.oper.chan))
goto free;
sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band];
changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems);
if (ieee80211_config_bw(link, elems, true, &changed)) {
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
WLAN_REASON_DEAUTH_LEAVING,
true, deauth_buf);
ieee80211_report_disconnect(sdata, deauth_buf,
sizeof(deauth_buf), true,
WLAN_REASON_DEAUTH_LEAVING,
false);
goto free;
}
if (elems->opmode_notif)
ieee80211_vht_handle_opmode(sdata, link_sta,
*elems->opmode_notif,
rx_status->band);
changed |= ieee80211_handle_pwr_constr(link, chan, mgmt,
elems->country_elem,
elems->country_elem_len,
elems->pwr_constr_elem,
elems->cisco_dtpc_elem);
ieee80211_ml_reconfiguration(sdata, elems);
ieee80211_process_adv_ttlm(sdata, elems,
le64_to_cpu(mgmt->u.beacon.timestamp));
ieee80211_link_info_change_notify(sdata, link, changed);
free:
kfree(elems);
}
static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata,
struct ieee80211_neg_ttlm neg_ttlm)
{
u16 new_active_links, new_dormant_links, new_suspended_links, map = 0;
u8 i;
for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++)
map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i];
/* If there is an active TTLM, unset previously suspended links */
if (sdata->vif.neg_ttlm.valid)
sdata->vif.dormant_links &= ~sdata->vif.suspended_links;
/* exclude links that are already disabled by advertised TTLM */
new_active_links =
map & sdata->vif.valid_links & ~sdata->vif.dormant_links;
new_suspended_links =
(~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links;
new_dormant_links = sdata->vif.dormant_links | new_suspended_links;
if (ieee80211_ttlm_set_links(sdata, new_active_links,
new_dormant_links, new_suspended_links))
return;
sdata->vif.neg_ttlm = neg_ttlm;
sdata->vif.neg_ttlm.valid = true;
}
static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy,
struct wiphy_work *work)
{
struct ieee80211_sub_if_data *sdata =
container_of(work, struct ieee80211_sub_if_data,
u.mgd.neg_ttlm_timeout_work.work);
sdata_info(sdata,
"No negotiated TTLM response from AP, disconnecting.\n");
__ieee80211_disconnect(sdata);
}
static void
ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb,
struct ieee80211_neg_ttlm *neg_ttlm)
{
u8 i, direction[IEEE80211_TTLM_MAX_CNT];
if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink,
sizeof(neg_ttlm->downlink))) {
direction[0] = IEEE80211_TTLM_DIRECTION_DOWN;
direction[1] = IEEE80211_TTLM_DIRECTION_UP;
} else {
direction[0] = IEEE80211_TTLM_DIRECTION_BOTH;
}
for (i = 0; i < ARRAY_SIZE(direction); i++) {
u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos;
__le16 map;
len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1;
pos = skb_put(skb, len + 2);
*pos++ = WLAN_EID_EXTENSION;
len_pos = pos++;
*pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING;
*pos++ = direction[i];
map_ind_pos = pos++;
for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) {
map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ?
cpu_to_le16(neg_ttlm->uplink[tid]) :
cpu_to_le16(neg_ttlm->downlink[tid]);
if (!map)
continue;
len += 2;
map_ind |= BIT(tid);
skb_put_data(skb, &map, sizeof(map));
}
*map_ind_pos = map_ind;
*len_pos = len;
if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH)
break;
}
}
static void
ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata,
struct ieee80211_neg_ttlm *neg_ttlm,
u8 dialog_token)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_mgmt *mgmt;
struct sk_buff *skb;
int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req);
int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 +
2 * 2 * IEEE80211_TTLM_NUM_TIDS;
skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len);
if (!skb)
return;
skb_reserve(skb, local->tx_headroom);
mgmt = skb_put_zero(skb, hdr_len);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_ACTION);
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);
mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT;
mgmt->u.action.u.ttlm_req.action_code =
WLAN_PROTECTED_EHT_ACTION_TTLM_REQ;
mgmt->u.action.u.ttlm_req.dialog_token = dialog_token;
ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm);
ieee80211_tx_skb(sdata, skb);
}
int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata,
struct cfg80211_ttlm_params *params)
{
struct ieee80211_neg_ttlm neg_ttlm = {};
u8 i;
if (!ieee80211_vif_is_mld(&sdata->vif) ||
!(sdata->vif.cfg.mld_capa_op &
IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP))
return -EINVAL;
for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) {
if ((params->dlink[i] & ~sdata->vif.valid_links) ||
(params->ulink[i] & ~sdata->vif.valid_links))
return -EINVAL;
neg_ttlm.downlink[i] = params->dlink[i];
neg_ttlm.uplink[i] = params->ulink[i];
}
if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) !=
NEG_TTLM_RES_ACCEPT)
return -EINVAL;
ieee80211_apply_neg_ttlm(sdata, neg_ttlm);
sdata->u.mgd.dialog_token_alloc++;
ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm,
sdata->u.mgd.dialog_token_alloc);
wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
&sdata->u.mgd.neg_ttlm_timeout_work);
wiphy_delayed_work_queue(sdata->local->hw.wiphy,
&sdata->u.mgd.neg_ttlm_timeout_work,
IEEE80211_NEG_TTLM_REQ_TIMEOUT);
return 0;
}
static void
ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata,
enum ieee80211_neg_ttlm_res ttlm_res,
u8 dialog_token,
struct ieee80211_neg_ttlm *neg_ttlm)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_mgmt *mgmt;
struct sk_buff *skb;
int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res);
int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 +
2 * 2 * IEEE80211_TTLM_NUM_TIDS;
skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len);
if (!skb)
return;
skb_reserve(skb, local->tx_headroom);
mgmt = skb_put_zero(skb, hdr_len);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_ACTION);
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);
mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT;
mgmt->u.action.u.ttlm_res.action_code =
WLAN_PROTECTED_EHT_ACTION_TTLM_RES;
mgmt->u.action.u.ttlm_res.dialog_token = dialog_token;
switch (ttlm_res) {
default:
WARN_ON(1);
fallthrough;
case NEG_TTLM_RES_REJECT:
mgmt->u.action.u.ttlm_res.status_code =
WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING;
break;
case NEG_TTLM_RES_ACCEPT:
mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS;
break;
case NEG_TTLM_RES_SUGGEST_PREFERRED:
mgmt->u.action.u.ttlm_res.status_code =
WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED;
ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm);
break;
}
ieee80211_tx_skb(sdata, skb);
}
static int
ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata,
const struct ieee80211_ttlm_elem *ttlm,
struct ieee80211_neg_ttlm *neg_ttlm,
u8 *direction)
{
u8 control, link_map_presence, map_size, tid;
u8 *pos;
/* The element size was already validated in
* ieee80211_tid_to_link_map_size_ok()
*/
pos = (void *)ttlm->optional;
control = ttlm->control;
/* mapping switch time and expected duration fields are not expected
* in case of negotiated TTLM
*/
if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT |
IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) {
mlme_dbg(sdata,
"Invalid TTLM element in negotiated TTLM request\n");
return -EINVAL;
}
if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) {
for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) {
neg_ttlm->downlink[tid] = sdata->vif.valid_links;
neg_ttlm->uplink[tid] = sdata->vif.valid_links;
}
*direction = IEEE80211_TTLM_DIRECTION_BOTH;
return 0;
}
*direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION);
if (*direction != IEEE80211_TTLM_DIRECTION_DOWN &&
*direction != IEEE80211_TTLM_DIRECTION_UP &&
*direction != IEEE80211_TTLM_DIRECTION_BOTH)
return -EINVAL;
link_map_presence = *pos;
pos++;
if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE)
map_size = 1;
else
map_size = 2;
for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) {
u16 map;
if (link_map_presence & BIT(tid)) {
map = ieee80211_get_ttlm(map_size, pos);
if (!map) {
mlme_dbg(sdata,
"No active links for TID %d", tid);
return -EINVAL;
}
} else {
map = 0;
}
switch (*direction) {
case IEEE80211_TTLM_DIRECTION_BOTH:
neg_ttlm->downlink[tid] = map;
neg_ttlm->uplink[tid] = map;
break;
case IEEE80211_TTLM_DIRECTION_DOWN:
neg_ttlm->downlink[tid] = map;
break;
case IEEE80211_TTLM_DIRECTION_UP:
neg_ttlm->uplink[tid] = map;
break;
default:
return -EINVAL;
}
pos += map_size;
}
return 0;
}
void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt, size_t len)
{
u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i;
size_t ies_len;
enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT;
struct ieee802_11_elems *elems = NULL;
struct ieee80211_neg_ttlm neg_ttlm = {};
BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm));
if (!ieee80211_vif_is_mld(&sdata->vif))
return;
dialog_token = mgmt->u.action.u.ttlm_req.dialog_token;
ies_len = len - offsetof(struct ieee80211_mgmt,
u.action.u.ttlm_req.variable);
elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable,
ies_len, true, NULL);
if (!elems) {
ttlm_res = NEG_TTLM_RES_REJECT;
goto out;
}
for (i = 0; i < elems->ttlm_num; i++) {
if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i],
&neg_ttlm, &direction[i]) ||
(direction[i] == IEEE80211_TTLM_DIRECTION_BOTH &&
elems->ttlm_num != 1)) {
ttlm_res = NEG_TTLM_RES_REJECT;
goto out;
}
}
if (!elems->ttlm_num ||
(elems->ttlm_num == 2 && direction[0] == direction[1])) {
ttlm_res = NEG_TTLM_RES_REJECT;
goto out;
}
for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) {
if ((neg_ttlm.downlink[i] &&
(neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) ||
(neg_ttlm.uplink[i] &&
(neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) {
ttlm_res = NEG_TTLM_RES_REJECT;
goto out;
}
}
ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm);
if (ttlm_res != NEG_TTLM_RES_ACCEPT)
goto out;
ieee80211_apply_neg_ttlm(sdata, neg_ttlm);
out:
kfree(elems);
ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm);
}
void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt, size_t len)
{
if (!ieee80211_vif_is_mld(&sdata->vif) ||
mgmt->u.action.u.ttlm_req.dialog_token !=
sdata->u.mgd.dialog_token_alloc)
return;
wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
&sdata->u.mgd.neg_ttlm_timeout_work);
/* MLD station sends a TID to link mapping request, mainly to handle
* BTM (BSS transition management) request, in which case it needs to
* restrict the active links set.
* In this case it's not expected that the MLD AP will reject the
* negotiated TTLM request.
* This can be better implemented in the future, to handle request
* rejections.
*/
if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS)
__ieee80211_disconnect(sdata);
}
static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy,
struct wiphy_work *work)
{
u16 new_dormant_links;
struct ieee80211_sub_if_data *sdata =
container_of(work, struct ieee80211_sub_if_data,
u.mgd.teardown_ttlm_work);
if (!sdata->vif.neg_ttlm.valid)
return;
memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm));
new_dormant_links =
sdata->vif.dormant_links & ~sdata->vif.suspended_links;
sdata->vif.suspended_links = 0;
ieee80211_vif_set_links(sdata, sdata->vif.valid_links,
new_dormant_links);
ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM |
BSS_CHANGED_MLD_VALID_LINKS);
}
void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_local *local = sdata->local;
struct ieee80211_mgmt *mgmt;
struct sk_buff *skb;
int frame_len = offsetofend(struct ieee80211_mgmt,
u.action.u.ttlm_tear_down);
struct ieee80211_tx_info *info;
skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len);
if (!skb)
return;
skb_reserve(skb, local->hw.extra_tx_headroom);
mgmt = skb_put_zero(skb, frame_len);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_ACTION);
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);
mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT;
mgmt->u.action.u.ttlm_tear_down.action_code =
WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN;
info = IEEE80211_SKB_CB(skb);
info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM;
ieee80211_tx_skb(sdata, skb);
}
EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm);
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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
rx_status = (struct ieee80211_rx_status *) skb->cb;
hdr = (struct ieee80211_hdr *) skb->data;
fc = le16_to_cpu(hdr->frame_control);
switch (fc & IEEE80211_FCTL_STYPE) {
case IEEE80211_STYPE_S1G_BEACON:
ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status);
break;
}
}
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 ieee802_11_elems *elems;
struct ieee80211_mgmt *mgmt;
u16 fc;
int ies_len;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
rx_status = (struct ieee80211_rx_status *) skb->cb;
mgmt = (struct ieee80211_mgmt *) skb->data;
fc = le16_to_cpu(mgmt->frame_control);
if (rx_status->link_valid) {
link = sdata_dereference(sdata->link[rx_status->link_id],
sdata);
if (!link)
return;
}
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 (!sdata->u.mgd.associated ||
!ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr))
break;
switch (mgmt->u.action.category) {
case WLAN_CATEGORY_SPECTRUM_MGMT:
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) {
enum ieee80211_csa_source src =
IEEE80211_CSA_SOURCE_PROT_ACTION;
ieee80211_sta_process_chanswitch(link,
rx_status->mactime,
rx_status->device_timestamp,
elems, elems,
src);
}
kfree(elems);
break;
case WLAN_CATEGORY_PUBLIC:
case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION:
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) {
enum ieee80211_csa_source src;
if (mgmt->u.action.category ==
WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION)
src = IEEE80211_CSA_SOURCE_PROT_ACTION;
else
src = IEEE80211_CSA_SOURCE_UNPROT_ACTION;
/* 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, elems,
src);
}
kfree(elems);
break;
}
break;
}
}
static void ieee80211_sta_timer(struct timer_list *t)
{
struct ieee80211_sub_if_data *sdata =
from_timer(sdata, t, u.mgd.timer);
wiphy_work_queue(sdata->local->hw.wiphy, &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,
};
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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);
info.link_id = auth_data->link_id;
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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
assoc_data->tries++;
assoc_data->comeback = false;
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;
wiphy_work_queue(local->hw.wiphy, &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;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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 &&
!ifmgd->assoc_data->comeback &&
(ieee80211_is_assoc_req(fc) ||
ieee80211_is_reassoc_req(fc))) {
/*
* Update association timeout based on the TX status
* for the (Re)Association Request frame. Skip this if
* we have already processed a (Re)Association Response
* frame that indicated need for association comeback
* at a specific time in the future. This could happen
* if the TX status information is delayed enough for
* the response to be received and processed first.
*/
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);
}
}
}
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(ieee80211_vif_is_mld(&sdata->vif)))
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;
wiphy_work_queue(sdata->local->hw.wiphy,
&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(ieee80211_vif_is_mld(&sdata->vif)))
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;
}
wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work);
}
static void ieee80211_sta_monitor_work(struct wiphy *wiphy,
struct wiphy_work *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))
wiphy_work_queue(sdata->local->hw.wiphy,
&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];
lockdep_assert_wiphy(sdata->local->hw.wiphy);
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);
}
}
#endif
void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
if (!ifmgd->associated)
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);
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);
return;
}
}
static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy,
struct wiphy_work *work)
{
struct ieee80211_link_data *link =
container_of(work, struct ieee80211_link_data,
u.mgd.request_smps_work);
__ieee80211_request_smps_mgd(link->sdata, link,
link->u.mgd.driver_smps_mode);
}
/* interface setup */
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
wiphy_work_init(&ifmgd->beacon_connection_loss_work,
ieee80211_beacon_connection_loss_work);
wiphy_work_init(&ifmgd->csa_connection_drop_work,
ieee80211_csa_connection_drop_work);
wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work,
ieee80211_tdls_peer_del_work);
wiphy_delayed_work_init(&ifmgd->ml_reconf_work,
ieee80211_ml_reconf_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);
wiphy_delayed_work_init(&ifmgd->tx_tspec_wk,
ieee80211_sta_handle_tspec_ac_params_wk);
wiphy_delayed_work_init(&ifmgd->ttlm_work,
ieee80211_tid_to_link_map_work);
wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work,
ieee80211_neg_ttlm_timeout_work);
wiphy_work_init(&ifmgd->teardown_ttlm_work,
ieee80211_teardown_ttlm_work);
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;
ifmgd->mcast_seq_last = IEEE80211_SN_MODULO;
}
static void ieee80211_recalc_smps_work(struct wiphy *wiphy,
struct wiphy_work *work)
{
struct ieee80211_link_data *link =
container_of(work, struct ieee80211_link_data,
u.mgd.recalc_smps);
ieee80211_recalc_smps(link->sdata, link);
}
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->conf->bssid = link->u.mgd.bssid;
link->smps_mode = IEEE80211_SMPS_OFF;
wiphy_work_init(&link->u.mgd.request_smps_work,
ieee80211_request_smps_mgd_work);
wiphy_work_init(&link->u.mgd.recalc_smps,
ieee80211_recalc_smps_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;
wiphy_delayed_work_init(&link->u.mgd.csa.switch_work,
ieee80211_csa_switch_work);
ieee80211_clear_tpe(&link->conf->tpe);
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,
struct ieee80211_conn_settings *conn,
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), 0);
} else {
if (WARN_ON(ap_mld_addr))
return -EINVAL;
ap_mld_addr = cbss->bssid;
err = ieee80211_vif_set_links(sdata, 0, 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) {
/*
* Only set this if we're also going to calculate the AP
* settings etc., otherwise this was set before in a
* previous call. Note override is set to %true in assoc
* if the settings were changed.
*/
link->u.mgd.conn = *conn;
err = ieee80211_prep_channel(sdata, link, link->link_id, cbss,
mlo, &link->u.mgd.conn);
if (err) {
if (new_sta)
sta_info_free(local, new_sta);
goto out_err;
}
/* pass out for use in assoc */
*conn = link->u.mgd.conn;
}
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_release_chan;
}
} 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_release_chan:
ieee80211_link_release_channel(link);
out_err:
ieee80211_vif_set_links(sdata, 0, 0);
return err;
}
static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata,
const struct cfg80211_bss_ies *ies,
u8 cur_channel, bool ignore_ecsa)
{
const struct element *csa_elem, *ecsa_elem;
struct ieee80211_channel_sw_ie *csa = NULL;
struct ieee80211_ext_chansw_ie *ecsa = NULL;
if (!ies)
return false;
csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH,
ies->data, ies->len);
if (csa_elem && csa_elem->datalen == sizeof(*csa))
csa = (void *)csa_elem->data;
ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN,
ies->data, ies->len);
if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa))
ecsa = (void *)ecsa_elem->data;
if (csa && csa->count == 0)
csa = NULL;
if (csa && !csa->mode && csa->new_ch_num == cur_channel)
csa = NULL;
if (ecsa && ecsa->count == 0)
ecsa = NULL;
if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel)
ecsa = NULL;
if (ignore_ecsa && ecsa) {
sdata_info(sdata,
"Ignoring ECSA in probe response - was considered stuck!\n");
return csa;
}
return csa || ecsa;
}
static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata,
struct cfg80211_bss *bss)
{
u8 cur_channel;
bool ret;
cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq);
rcu_read_lock();
if (ieee80211_mgd_csa_present(sdata,
rcu_dereference(bss->beacon_ies),
cur_channel, false)) {
ret = true;
goto out;
}
if (ieee80211_mgd_csa_present(sdata,
rcu_dereference(bss->proberesp_ies),
cur_channel, bss->proberesp_ecsa_stuck)) {
ret = true;
goto out;
}
ret = false;
out:
rcu_read_unlock();
return ret;
}
/* 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;
struct ieee80211_conn_settings conn;
struct ieee80211_link_data *link;
struct ieee80211_supported_band *sband;
struct ieee80211_bss *bss;
u16 auth_alg;
int err;
bool cont_auth, wmm_used;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
/* 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;
if (ieee80211_mgd_csa_in_process(sdata, req->bss)) {
sdata_info(sdata, "AP is in CSA process, reject auth\n");
return -EINVAL;
}
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);
}
/* needed for transmitting the auth frame(s) properly */
memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN);
bss = (void *)req->bss->priv;
wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS);
sband = local->hw.wiphy->bands[req->bss->channel->band];
ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used,
&conn);
err = ieee80211_prep_connection(sdata, req->bss, req->link_id,
req->ap_mld_addr, cont_auth,
&conn, false);
if (err)
goto err_clear;
if (req->link_id >= 0)
link = sdata_dereference(sdata->link[req->link_id], sdata);
else
link = &sdata->deflink;
if (WARN_ON(!link)) {
err = -ENOLINK;
goto err_clear;
}
sdata_info(sdata, "authenticate with %pM (local address=%pM)\n",
auth_data->ap_addr, link->conf->addr);
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 (!ieee80211_vif_is_mld(&sdata->vif)) {
eth_zero_addr(sdata->deflink.u.mgd.bssid);
ieee80211_link_info_change_notify(sdata, &sdata->deflink,
BSS_CHANGED_BSSID);
ieee80211_link_release_channel(&sdata->deflink);
}
ifmgd->auth_data = NULL;
kfree(auth_data);
return err;
}
static void
ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgd_assoc_data *assoc_data,
struct cfg80211_assoc_request *req,
struct ieee80211_conn_settings *conn,
unsigned int link_id)
{
struct ieee80211_local *local = sdata->local;
const struct cfg80211_bss_ies *bss_ies;
struct ieee80211_supported_band *sband;
struct ieee80211_link_data *link;
struct cfg80211_bss *cbss;
struct ieee80211_bss *bss;
cbss = assoc_data->link[link_id].bss;
if (WARN_ON(!cbss))
return;
bss = (void *)cbss->priv;
sband = local->hw.wiphy->bands[cbss->channel->band];
if (WARN_ON(!sband))
return;
link = sdata_dereference(sdata->link[link_id], sdata);
if (WARN_ON(!link))
return;
/* 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;
}
link->u.mgd.beacon_crc_valid = false;
link->u.mgd.dtim_period = 0;
link->u.mgd.have_beacon = false;
/* override HT configuration only if the AP and we support it */
if (conn->mode >= IEEE80211_CONN_MODE_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();
bss_ies = rcu_dereference(cbss->beacon_ies);
if (bss_ies) {
u8 dtim_count = 0;
ieee80211_get_dtim(bss_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 = bss_ies->tsf;
link->conf->sync_device_ts = bss->device_ts_beacon;
link->conf->sync_dtim_count = dtim_count;
}
} else {
bss_ies = rcu_dereference(cbss->ies);
}
if (bss_ies) {
const struct element *elem;
elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
bss_ies->data, bss_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,
bss_ies->data, bss_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;
}
}
static int
ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgd_assoc_data *assoc_data,
int link_id)
{
struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
enum nl80211_band band = cbss->channel->band;
struct ieee80211_supported_band *sband;
const struct element *elem;
int err;
/* neither HT nor VHT elements used on 6 GHz */
if (band == NL80211_BAND_6GHZ)
return 0;
if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT)
return 0;
rcu_read_lock();
elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION);
if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) {
mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n",
cbss->bssid);
err = -EINVAL;
goto out_rcu;
}
assoc_data->link[link_id].ap_ht_param =
((struct ieee80211_ht_operation *)(elem->data))->ht_param;
rcu_read_unlock();
if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT)
return 0;
/* some drivers want to support VHT on 2.4 GHz even */
sband = sdata->local->hw.wiphy->bands[band];
if (!sband->vht_cap.vht_supported)
return 0;
rcu_read_lock();
elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
/* but even then accept it not being present on the AP */
if (!elem && band == NL80211_BAND_2GHZ) {
err = 0;
goto out_rcu;
}
if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) {
mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n",
cbss->bssid);
err = -EINVAL;
goto out_rcu;
}
memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data,
sizeof(struct ieee80211_vht_cap));
rcu_read_unlock();
return 0;
out_rcu:
rcu_read_unlock();
return err;
}
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;
struct ieee80211_link_data *link;
struct cfg80211_bss *cbss;
bool override, uapsd_supported;
bool match_auth;
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;
if (ieee80211_mgd_csa_in_process(sdata, cbss)) {
sdata_info(sdata, "AP is in CSA process, reject assoc\n");
err = -EINVAL;
goto err_free;
}
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();
err = -EINVAL;
goto err_free;
}
memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen);
assoc_data->ssid_len = ssid_elem->datalen;
rcu_read_unlock();
if (req->ap_mld_addr)
memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN);
else
memcpy(assoc_data->ap_addr, cbss->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);
}
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));
/* keep some setup (AP STA, channel, ...) if matching */
match_auth = ifmgd->auth_data &&
ether_addr_equal(ifmgd->auth_data->ap_addr,
assoc_data->ap_addr) &&
ifmgd->auth_data->link_id == req->link_id;
if (req->ap_mld_addr) {
uapsd_supported = true;
if (req->flags & (ASSOC_REQ_DISABLE_HT |
ASSOC_REQ_DISABLE_VHT |
ASSOC_REQ_DISABLE_HE |
ASSOC_REQ_DISABLE_EHT)) {
err = -EINVAL;
goto err_free;
}
for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
struct ieee80211_supported_band *sband;
struct cfg80211_bss *link_cbss = req->links[i].bss;
struct ieee80211_bss *bss;
if (!link_cbss)
continue;
bss = (void *)link_cbss->priv;
if (!bss->wmm_used) {
err = -EINVAL;
req->links[i].error = err;
goto err_free;
}
if (link_cbss->channel->band == NL80211_BAND_S1GHZ) {
err = -EINVAL;
req->links[i].error = err;
goto err_free;
}
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);
sband = local->hw.wiphy->bands[link_cbss->channel->band];
if (match_auth && i == assoc_link_id && link)
assoc_data->link[i].conn = link->u.mgd.conn;
else
assoc_data->link[i].conn =
ieee80211_conn_settings_unlimited;
ieee80211_determine_our_sta_mode_assoc(sdata, sband,
req, true, i,
&assoc_data->link[i].conn);
assoc_data->link[i].bss = link_cbss;
assoc_data->link[i].disabled = req->links[i].disabled;
if (!bss->uapsd_supported)
uapsd_supported = false;
if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) {
err = -EINVAL;
req->links[i].error = err;
goto err_free;
}
err = ieee80211_mgd_get_ap_ht_vht_capa(sdata,
assoc_data, i);
if (err) {
err = -EINVAL;
req->links[i].error = err;
goto err_free;
}
}
assoc_data->wmm = true;
} else {
struct ieee80211_supported_band *sband;
struct ieee80211_bss *bss = (void *)cbss->priv;
memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN);
assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
assoc_data->wmm = bss->wmm_used &&
(local->hw.queues >= IEEE80211_NUM_ACS);
if (cbss->channel->band == NL80211_BAND_6GHZ &&
req->flags & (ASSOC_REQ_DISABLE_HT |
ASSOC_REQ_DISABLE_VHT |
ASSOC_REQ_DISABLE_HE)) {
err = -EINVAL;
goto err_free;
}
sband = local->hw.wiphy->bands[cbss->channel->band];
assoc_data->link[0].bss = cbss;
if (match_auth)
assoc_data->link[0].conn = sdata->deflink.u.mgd.conn;
else
assoc_data->link[0].conn =
ieee80211_conn_settings_unlimited;
ieee80211_determine_our_sta_mode_assoc(sdata, sband, req,
assoc_data->wmm, 0,
&assoc_data->link[0].conn);
uapsd_supported = bss->uapsd_supported;
err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0);
if (err)
goto err_free;
}
assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU;
if (ifmgd->auth_data && !ifmgd->auth_data->done) {
err = -EBUSY;
goto err_free;
}
if (ifmgd->assoc_data) {
err = -EBUSY;
goto err_free;
}
/* Cleanup is delayed if auth_data matches */
if (ifmgd->auth_data && !match_auth)
ieee80211_destroy_auth_data(sdata, false);
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) {
/* if there was no authentication, set up the link */
err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0);
if (err)
goto err_clear;
}
link = sdata_dereference(sdata->link[assoc_link_id], sdata);
if (WARN_ON(!link)) {
err = -EINVAL;
goto err_clear;
}
override = link->u.mgd.conn.mode !=
assoc_data->link[assoc_link_id].conn.mode ||
link->u.mgd.conn.bw_limit !=
assoc_data->link[assoc_link_id].conn.bw_limit;
link->u.mgd.conn = assoc_data->link[assoc_link_id].conn;
ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn,
assoc_link_id);
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 (assoc_data->wmm && 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 mode, hence link == NULL */
err = ieee80211_prep_channel(sdata, NULL, i,
assoc_data->link[i].bss, true,
&assoc_data->link[i].conn);
if (err) {
req->links[i].error = err;
goto err_clear;
}
}
memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len);
vif_cfg->ssid_len = assoc_data->ssid_len;
/* 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,
&assoc_data->link[assoc_link_id].conn,
override);
if (err)
goto err_clear;
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);
/* We are associating, clean up auth_data */
if (ifmgd->auth_data)
ieee80211_destroy_auth_data(sdata, true);
return 0;
err_clear:
if (!ifmgd->auth_data) {
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));
info.link_id = ifmgd->auth_data->link_id;
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));
info.link_id = ifmgd->assoc_data->assoc_link_id;
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);
drv_mgd_complete_tx(sdata->local, sdata, &info);
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)
{
wiphy_work_cancel(link->sdata->local->hw.wiphy,
&link->u.mgd.request_smps_work);
wiphy_work_cancel(link->sdata->local->hw.wiphy,
&link->u.mgd.recalc_smps);
wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy,
&link->u.mgd.csa.switch_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.
*/
wiphy_work_cancel(sdata->local->hw.wiphy,
&ifmgd->monitor_work);
wiphy_work_cancel(sdata->local->hw.wiphy,
&ifmgd->beacon_connection_loss_work);
wiphy_work_cancel(sdata->local->hw.wiphy,
&ifmgd->csa_connection_drop_work);
wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
&ifmgd->tdls_peer_del_work);
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);
}
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);