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6067 lines
175 KiB
6067 lines
175 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
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* BSS client mode implementation |
|
* Copyright 2003-2008, Jouni Malinen <[email protected]> |
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* Copyright 2004, Instant802 Networks, Inc. |
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* Copyright 2005, Devicescape Software, Inc. |
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* Copyright 2006-2007 Jiri Benc <[email protected]> |
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* Copyright 2007, Michael Wu <[email protected]> |
|
* Copyright 2013-2014 Intel Mobile Communications GmbH |
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* Copyright (C) 2015 - 2017 Intel Deutschland GmbH |
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* Copyright (C) 2018 - 2021 Intel Corporation |
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*/ |
|
|
|
#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> |
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#include <linux/rtnetlink.h> |
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#include <linux/crc32.h> |
|
#include <linux/slab.h> |
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#include <linux/export.h> |
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#include <net/mac80211.h> |
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#include <asm/unaligned.h> |
|
|
|
#include "ieee80211_i.h" |
|
#include "driver-ops.h" |
|
#include "rate.h" |
|
#include "led.h" |
|
#include "fils_aead.h" |
|
|
|
#define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
|
#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) |
|
#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) |
|
#define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) |
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#define IEEE80211_AUTH_MAX_TRIES 3 |
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#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) |
|
#define IEEE80211_ASSOC_TIMEOUT (HZ / 5) |
|
#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) |
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#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) |
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#define IEEE80211_ASSOC_MAX_TRIES 3 |
|
|
|
static int max_nullfunc_tries = 2; |
|
module_param(max_nullfunc_tries, int, 0644); |
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MODULE_PARM_DESC(max_nullfunc_tries, |
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"Maximum nullfunc tx tries before disconnecting (reason 4)."); |
|
|
|
static int max_probe_tries = 5; |
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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. |
|
*/ |
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static int beacon_loss_count = 7; |
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module_param(beacon_loss_count, int, 0644); |
|
MODULE_PARM_DESC(beacon_loss_count, |
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"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, |
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"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 |
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* function ensures that. Note that it then is required to |
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* run this function for all timeouts after the first one |
|
* has happened -- the work that runs from this timer will |
|
* do that. |
|
*/ |
|
static void run_again(struct ieee80211_sub_if_data *sdata, |
|
unsigned long timeout) |
|
{ |
|
sdata_assert_lock(sdata); |
|
|
|
if (!timer_pending(&sdata->u.mgd.timer) || |
|
time_before(timeout, sdata->u.mgd.timer.expires)) |
|
mod_timer(&sdata->u.mgd.timer, timeout); |
|
} |
|
|
|
void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) |
|
return; |
|
|
|
if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) |
|
return; |
|
|
|
mod_timer(&sdata->u.mgd.bcn_mon_timer, |
|
round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); |
|
} |
|
|
|
void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
|
|
if (unlikely(!ifmgd->associated)) |
|
return; |
|
|
|
if (ifmgd->probe_send_count) |
|
ifmgd->probe_send_count = 0; |
|
|
|
if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) |
|
return; |
|
|
|
mod_timer(&ifmgd->conn_mon_timer, |
|
round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); |
|
} |
|
|
|
static int ecw2cw(int ecw) |
|
{ |
|
return (1 << ecw) - 1; |
|
} |
|
|
|
static u32 |
|
ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_supported_band *sband, |
|
struct ieee80211_channel *channel, |
|
u32 vht_cap_info, |
|
const struct ieee80211_ht_operation *ht_oper, |
|
const struct ieee80211_vht_operation *vht_oper, |
|
const struct ieee80211_he_operation *he_oper, |
|
const struct ieee80211_s1g_oper_ie *s1g_oper, |
|
struct cfg80211_chan_def *chandef, bool tracking) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct cfg80211_chan_def vht_chandef; |
|
struct ieee80211_sta_ht_cap sta_ht_cap; |
|
u32 ht_cfreq, ret; |
|
|
|
memset(chandef, 0, sizeof(struct cfg80211_chan_def)); |
|
chandef->chan = channel; |
|
chandef->width = NL80211_CHAN_WIDTH_20_NOHT; |
|
chandef->center_freq1 = channel->center_freq; |
|
chandef->freq1_offset = channel->freq_offset; |
|
|
|
if (channel->band == NL80211_BAND_6GHZ) { |
|
if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef)) { |
|
mlme_dbg(sdata, |
|
"bad 6 GHz operation, disabling HT/VHT/HE\n"); |
|
ret = IEEE80211_STA_DISABLE_HT | |
|
IEEE80211_STA_DISABLE_VHT | |
|
IEEE80211_STA_DISABLE_HE; |
|
} else { |
|
ret = 0; |
|
} |
|
vht_chandef = *chandef; |
|
goto out; |
|
} else if (sband->band == NL80211_BAND_S1GHZ) { |
|
if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { |
|
sdata_info(sdata, |
|
"Missing S1G Operation Element? Trying operating == primary\n"); |
|
chandef->width = ieee80211_s1g_channel_width(channel); |
|
} |
|
|
|
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ | |
|
IEEE80211_STA_DISABLE_VHT | |
|
IEEE80211_STA_DISABLE_80P80MHZ | |
|
IEEE80211_STA_DISABLE_160MHZ; |
|
goto out; |
|
} |
|
|
|
memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); |
|
ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); |
|
|
|
if (!ht_oper || !sta_ht_cap.ht_supported) { |
|
mlme_dbg(sdata, "HT operation missing / HT not supported\n"); |
|
ret = IEEE80211_STA_DISABLE_HT | |
|
IEEE80211_STA_DISABLE_VHT | |
|
IEEE80211_STA_DISABLE_HE; |
|
goto out; |
|
} |
|
|
|
chandef->width = NL80211_CHAN_WIDTH_20; |
|
|
|
ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, |
|
channel->band); |
|
/* check that channel matches the right operating channel */ |
|
if (!tracking && channel->center_freq != ht_cfreq) { |
|
/* |
|
* It's possible that some APs are confused here; |
|
* Netgear WNDR3700 sometimes reports 4 higher than |
|
* the actual channel in association responses, but |
|
* since we look at probe response/beacon data here |
|
* it should be OK. |
|
*/ |
|
sdata_info(sdata, |
|
"Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", |
|
channel->center_freq, ht_cfreq, |
|
ht_oper->primary_chan, channel->band); |
|
ret = IEEE80211_STA_DISABLE_HT | |
|
IEEE80211_STA_DISABLE_VHT | |
|
IEEE80211_STA_DISABLE_HE; |
|
goto out; |
|
} |
|
|
|
/* check 40 MHz support, if we have it */ |
|
if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { |
|
ieee80211_chandef_ht_oper(ht_oper, chandef); |
|
} else { |
|
mlme_dbg(sdata, "40 MHz not supported\n"); |
|
/* 40 MHz (and 80 MHz) must be supported for VHT */ |
|
ret = IEEE80211_STA_DISABLE_VHT; |
|
/* also mark 40 MHz disabled */ |
|
ret |= IEEE80211_STA_DISABLE_40MHZ; |
|
goto out; |
|
} |
|
|
|
if (!vht_oper || !sband->vht_cap.vht_supported) { |
|
mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); |
|
ret = IEEE80211_STA_DISABLE_VHT; |
|
goto out; |
|
} |
|
|
|
vht_chandef = *chandef; |
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && |
|
(le32_to_cpu(he_oper->he_oper_params) & |
|
IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { |
|
struct ieee80211_vht_operation he_oper_vht_cap; |
|
|
|
/* |
|
* Set only first 3 bytes (other 2 aren't used in |
|
* ieee80211_chandef_vht_oper() anyway) |
|
*/ |
|
memcpy(&he_oper_vht_cap, he_oper->optional, 3); |
|
he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); |
|
|
|
if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, |
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&he_oper_vht_cap, ht_oper, |
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&vht_chandef)) { |
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if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) |
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sdata_info(sdata, |
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"HE AP VHT information is invalid, disabling HE\n"); |
|
ret = IEEE80211_STA_DISABLE_HE; |
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goto out; |
|
} |
|
} else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, |
|
vht_cap_info, |
|
vht_oper, ht_oper, |
|
&vht_chandef)) { |
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
|
sdata_info(sdata, |
|
"AP VHT information is invalid, disabling VHT\n"); |
|
ret = IEEE80211_STA_DISABLE_VHT; |
|
goto out; |
|
} |
|
|
|
if (!cfg80211_chandef_valid(&vht_chandef)) { |
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
|
sdata_info(sdata, |
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"AP VHT information is invalid, disabling VHT\n"); |
|
ret = IEEE80211_STA_DISABLE_VHT; |
|
goto out; |
|
} |
|
|
|
if (cfg80211_chandef_identical(chandef, &vht_chandef)) { |
|
ret = 0; |
|
goto out; |
|
} |
|
|
|
if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { |
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
|
sdata_info(sdata, |
|
"AP VHT information doesn't match HT, disabling VHT\n"); |
|
ret = IEEE80211_STA_DISABLE_VHT; |
|
goto out; |
|
} |
|
|
|
*chandef = vht_chandef; |
|
|
|
ret = 0; |
|
|
|
out: |
|
/* |
|
* When tracking the current AP, don't do any further checks if the |
|
* new chandef is identical to the one we're currently using for the |
|
* connection. This keeps us from playing ping-pong with regulatory, |
|
* without it the following can happen (for example): |
|
* - connect to an AP with 80 MHz, world regdom allows 80 MHz |
|
* - AP advertises regdom US |
|
* - CRDA loads regdom US with 80 MHz prohibited (old database) |
|
* - the code below detects an unsupported channel, downgrades, and |
|
* we disconnect from the AP in the caller |
|
* - disconnect causes CRDA to reload world regdomain and the game |
|
* starts anew. |
|
* (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) |
|
* |
|
* It seems possible that there are still scenarios with CSA or real |
|
* bandwidth changes where a this could happen, but those cases are |
|
* less common and wouldn't completely prevent using the AP. |
|
*/ |
|
if (tracking && |
|
cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) |
|
return ret; |
|
|
|
/* don't print the message below for VHT mismatch if VHT is disabled */ |
|
if (ret & IEEE80211_STA_DISABLE_VHT) |
|
vht_chandef = *chandef; |
|
|
|
/* |
|
* Ignore the DISABLED flag when we're already connected and only |
|
* tracking the APs beacon for bandwidth changes - otherwise we |
|
* might get disconnected here if we connect to an AP, update our |
|
* regulatory information based on the AP's country IE and the |
|
* information we have is wrong/outdated and disables the channel |
|
* that we're actually using for the connection to the AP. |
|
*/ |
|
while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, |
|
tracking ? 0 : |
|
IEEE80211_CHAN_DISABLED)) { |
|
if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { |
|
ret = IEEE80211_STA_DISABLE_HT | |
|
IEEE80211_STA_DISABLE_VHT | |
|
IEEE80211_STA_DISABLE_HE; |
|
break; |
|
} |
|
|
|
ret |= ieee80211_chandef_downgrade(chandef); |
|
} |
|
|
|
if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, |
|
IEEE80211_CHAN_NO_HE)) |
|
ret |= IEEE80211_STA_DISABLE_HE; |
|
|
|
if (chandef->width != vht_chandef.width && !tracking) |
|
sdata_info(sdata, |
|
"capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); |
|
|
|
WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); |
|
return ret; |
|
} |
|
|
|
static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, |
|
struct sta_info *sta, |
|
const struct ieee80211_ht_cap *ht_cap, |
|
const struct ieee80211_vht_cap *vht_cap, |
|
const struct ieee80211_ht_operation *ht_oper, |
|
const struct ieee80211_vht_operation *vht_oper, |
|
const struct ieee80211_he_operation *he_oper, |
|
const struct ieee80211_s1g_oper_ie *s1g_oper, |
|
const u8 *bssid, u32 *changed) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; |
|
struct ieee80211_supported_band *sband = |
|
local->hw.wiphy->bands[chan->band]; |
|
struct cfg80211_chan_def chandef; |
|
u16 ht_opmode; |
|
u32 flags; |
|
u32 vht_cap_info = 0; |
|
int ret; |
|
|
|
/* if HT was/is disabled, don't track any bandwidth changes */ |
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) |
|
return 0; |
|
|
|
/* don't check VHT if we associated as non-VHT station */ |
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) |
|
vht_oper = NULL; |
|
|
|
/* don't check HE if we associated as non-HE station */ |
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || |
|
!ieee80211_get_he_iftype_cap(sband, |
|
ieee80211_vif_type_p2p(&sdata->vif))) |
|
|
|
he_oper = NULL; |
|
|
|
if (WARN_ON_ONCE(!sta)) |
|
return -EINVAL; |
|
|
|
/* |
|
* if bss configuration changed store the new one - |
|
* this may be applicable even if channel is identical |
|
*/ |
|
ht_opmode = le16_to_cpu(ht_oper->operation_mode); |
|
if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { |
|
*changed |= BSS_CHANGED_HT; |
|
sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
|
} |
|
|
|
if (vht_cap) |
|
vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); |
|
|
|
/* calculate new channel (type) based on HT/VHT/HE operation IEs */ |
|
flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info, |
|
ht_oper, vht_oper, he_oper, |
|
s1g_oper, &chandef, true); |
|
|
|
/* |
|
* Downgrade the new channel if we associated with restricted |
|
* capabilities. For example, if we associated as a 20 MHz STA |
|
* to a 40 MHz AP (due to regulatory, capabilities or config |
|
* reasons) then switching to a 40 MHz channel now won't do us |
|
* any good -- we couldn't use it with the AP. |
|
*/ |
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && |
|
chandef.width == NL80211_CHAN_WIDTH_80P80) |
|
flags |= ieee80211_chandef_downgrade(&chandef); |
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && |
|
chandef.width == NL80211_CHAN_WIDTH_160) |
|
flags |= ieee80211_chandef_downgrade(&chandef); |
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && |
|
chandef.width > NL80211_CHAN_WIDTH_20) |
|
flags |= ieee80211_chandef_downgrade(&chandef); |
|
|
|
if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) |
|
return 0; |
|
|
|
sdata_info(sdata, |
|
"AP %pM changed bandwidth, new config is %d.%03d MHz, " |
|
"width %d (%d.%03d/%d MHz)\n", |
|
ifmgd->bssid, chandef.chan->center_freq, |
|
chandef.chan->freq_offset, chandef.width, |
|
chandef.center_freq1, chandef.freq1_offset, |
|
chandef.center_freq2); |
|
|
|
if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | |
|
IEEE80211_STA_DISABLE_VHT | |
|
IEEE80211_STA_DISABLE_HE | |
|
IEEE80211_STA_DISABLE_40MHZ | |
|
IEEE80211_STA_DISABLE_80P80MHZ | |
|
IEEE80211_STA_DISABLE_160MHZ)) || |
|
!cfg80211_chandef_valid(&chandef)) { |
|
sdata_info(sdata, |
|
"AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", |
|
ifmgd->bssid, flags, ifmgd->flags); |
|
return -EINVAL; |
|
} |
|
|
|
ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); |
|
|
|
if (ret) { |
|
sdata_info(sdata, |
|
"AP %pM changed bandwidth to incompatible one - disconnect\n", |
|
ifmgd->bssid); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* frame sending functions */ |
|
|
|
static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, |
|
struct sk_buff *skb, u8 ap_ht_param, |
|
struct ieee80211_supported_band *sband, |
|
struct ieee80211_channel *channel, |
|
enum ieee80211_smps_mode smps) |
|
{ |
|
u8 *pos; |
|
u32 flags = channel->flags; |
|
u16 cap; |
|
struct ieee80211_sta_ht_cap ht_cap; |
|
|
|
BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); |
|
|
|
memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
|
ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
|
|
|
/* determine capability flags */ |
|
cap = ht_cap.cap; |
|
|
|
switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
|
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
|
if (flags & IEEE80211_CHAN_NO_HT40PLUS) { |
|
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
|
cap &= ~IEEE80211_HT_CAP_SGI_40; |
|
} |
|
break; |
|
case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
|
if (flags & IEEE80211_CHAN_NO_HT40MINUS) { |
|
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
|
cap &= ~IEEE80211_HT_CAP_SGI_40; |
|
} |
|
break; |
|
} |
|
|
|
/* |
|
* If 40 MHz was disabled associate as though we weren't |
|
* capable of 40 MHz -- some broken APs will never fall |
|
* back to trying to transmit in 20 MHz. |
|
*/ |
|
if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { |
|
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
|
cap &= ~IEEE80211_HT_CAP_SGI_40; |
|
} |
|
|
|
/* set SM PS mode properly */ |
|
cap &= ~IEEE80211_HT_CAP_SM_PS; |
|
switch (smps) { |
|
case IEEE80211_SMPS_AUTOMATIC: |
|
case IEEE80211_SMPS_NUM_MODES: |
|
WARN_ON(1); |
|
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 may set the owner of the MU-MIMO capability |
|
*/ |
|
static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, |
|
struct sk_buff *skb, |
|
struct ieee80211_supported_band *sband, |
|
struct ieee80211_vht_cap *ap_vht_cap) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
u8 *pos; |
|
u32 cap; |
|
struct ieee80211_sta_vht_cap vht_cap; |
|
u32 mask, ap_bf_sts, our_bf_sts; |
|
|
|
BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); |
|
|
|
memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); |
|
ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); |
|
|
|
/* determine capability flags */ |
|
cap = vht_cap.cap; |
|
|
|
if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { |
|
u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
|
|
|
cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
|
if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || |
|
bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) |
|
cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; |
|
} |
|
|
|
if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { |
|
cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; |
|
cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
|
} |
|
|
|
/* |
|
* Some APs apparently get confused if our capabilities are better |
|
* than theirs, so restrict what we advertise in the assoc request. |
|
*/ |
|
if (!(ap_vht_cap->vht_cap_info & |
|
cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) |
|
cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | |
|
IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); |
|
else if (!(ap_vht_cap->vht_cap_info & |
|
cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) |
|
cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; |
|
|
|
/* |
|
* If some other vif is using the MU-MIMO capability we cannot associate |
|
* using MU-MIMO - this will lead to contradictions in the group-id |
|
* mechanism. |
|
* Ownership is defined since association request, in order to avoid |
|
* simultaneous associations with MU-MIMO. |
|
*/ |
|
if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { |
|
bool disable_mu_mimo = false; |
|
struct ieee80211_sub_if_data *other; |
|
|
|
list_for_each_entry_rcu(other, &local->interfaces, list) { |
|
if (other->vif.mu_mimo_owner) { |
|
disable_mu_mimo = true; |
|
break; |
|
} |
|
} |
|
if (disable_mu_mimo) |
|
cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; |
|
else |
|
sdata->vif.mu_mimo_owner = true; |
|
} |
|
|
|
mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; |
|
|
|
ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; |
|
our_bf_sts = cap & mask; |
|
|
|
if (ap_bf_sts < our_bf_sts) { |
|
cap &= ~mask; |
|
cap |= ap_bf_sts; |
|
} |
|
|
|
/* reserve and fill IE */ |
|
pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); |
|
ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); |
|
} |
|
|
|
/* This function determines HE capability flags for the association |
|
* and builds the IE. |
|
*/ |
|
static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, |
|
struct sk_buff *skb, |
|
struct ieee80211_supported_band *sband) |
|
{ |
|
u8 *pos; |
|
const struct ieee80211_sta_he_cap *he_cap = NULL; |
|
struct ieee80211_chanctx_conf *chanctx_conf; |
|
u8 he_cap_size; |
|
bool reg_cap = false; |
|
|
|
rcu_read_lock(); |
|
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
|
if (!WARN_ON_ONCE(!chanctx_conf)) |
|
reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy, |
|
&chanctx_conf->def, |
|
IEEE80211_CHAN_NO_HE); |
|
|
|
rcu_read_unlock(); |
|
|
|
he_cap = ieee80211_get_he_iftype_cap(sband, |
|
ieee80211_vif_type_p2p(&sdata->vif)); |
|
if (!he_cap || !reg_cap) |
|
return; |
|
|
|
he_cap_size = |
|
2 + 1 + sizeof(he_cap->he_cap_elem) + |
|
ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + |
|
ieee80211_he_ppe_size(he_cap->ppe_thres[0], |
|
he_cap->he_cap_elem.phy_cap_info); |
|
pos = skb_put(skb, he_cap_size); |
|
ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); |
|
|
|
ieee80211_ie_build_he_6ghz_cap(sdata, skb); |
|
} |
|
|
|
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 sk_buff *skb; |
|
struct ieee80211_mgmt *mgmt; |
|
u8 *pos, qos_info, *ie_start; |
|
size_t offset = 0, noffset; |
|
int i, count, rates_len, supp_rates_len, shift; |
|
u16 capab; |
|
struct ieee80211_supported_band *sband; |
|
struct ieee80211_chanctx_conf *chanctx_conf; |
|
struct ieee80211_channel *chan; |
|
u32 rates = 0; |
|
__le16 listen_int; |
|
struct element *ext_capa = NULL; |
|
enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); |
|
const struct ieee80211_sband_iftype_data *iftd; |
|
struct ieee80211_prep_tx_info info = {}; |
|
int ret; |
|
|
|
/* we know it's writable, cast away the const */ |
|
if (assoc_data->ie_len) |
|
ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, |
|
assoc_data->ie, |
|
assoc_data->ie_len); |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
rcu_read_lock(); |
|
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
|
if (WARN_ON(!chanctx_conf)) { |
|
rcu_read_unlock(); |
|
return -EINVAL; |
|
} |
|
chan = chanctx_conf->def.chan; |
|
rcu_read_unlock(); |
|
sband = local->hw.wiphy->bands[chan->band]; |
|
shift = ieee80211_vif_get_shift(&sdata->vif); |
|
|
|
if (assoc_data->supp_rates_len) { |
|
/* |
|
* Get all rates supported by the device and the AP as |
|
* some APs don't like getting a superset of their rates |
|
* in the association request (e.g. D-Link DAP 1353 in |
|
* b-only mode)... |
|
*/ |
|
rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, |
|
assoc_data->supp_rates, |
|
assoc_data->supp_rates_len, |
|
&rates); |
|
} else { |
|
/* |
|
* In case AP not provide any supported rates information |
|
* before association, we send information element(s) with |
|
* all rates that we support. |
|
*/ |
|
rates_len = 0; |
|
for (i = 0; i < sband->n_bitrates; i++) { |
|
rates |= BIT(i); |
|
rates_len++; |
|
} |
|
} |
|
|
|
iftd = ieee80211_get_sband_iftype_data(sband, iftype); |
|
|
|
skb = alloc_skb(local->hw.extra_tx_headroom + |
|
sizeof(*mgmt) + /* bit too much but doesn't matter */ |
|
2 + assoc_data->ssid_len + /* SSID */ |
|
4 + rates_len + /* (extended) rates */ |
|
4 + /* power capability */ |
|
2 + 2 * sband->n_channels + /* supported channels */ |
|
2 + sizeof(struct ieee80211_ht_cap) + /* HT */ |
|
2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ |
|
2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ |
|
sizeof(struct ieee80211_he_mcs_nss_supp) + |
|
IEEE80211_HE_PPE_THRES_MAX_LEN + |
|
2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + |
|
assoc_data->ie_len + /* extra IEs */ |
|
(assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + |
|
9 + /* WMM */ |
|
(iftd ? iftd->vendor_elems.len : 0), |
|
GFP_KERNEL); |
|
if (!skb) |
|
return -ENOMEM; |
|
|
|
skb_reserve(skb, local->hw.extra_tx_headroom); |
|
|
|
capab = WLAN_CAPABILITY_ESS; |
|
|
|
if (sband->band == NL80211_BAND_2GHZ) { |
|
capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; |
|
capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; |
|
} |
|
|
|
if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) |
|
capab |= WLAN_CAPABILITY_PRIVACY; |
|
|
|
if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
|
ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) |
|
capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; |
|
|
|
if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) |
|
capab |= WLAN_CAPABILITY_RADIO_MEASURE; |
|
|
|
mgmt = skb_put_zero(skb, 24); |
|
memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); |
|
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
|
memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); |
|
|
|
listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ? |
|
ieee80211_encode_usf(local->hw.conf.listen_interval) : |
|
local->hw.conf.listen_interval); |
|
if (!is_zero_ether_addr(assoc_data->prev_bssid)) { |
|
skb_put(skb, 10); |
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
|
IEEE80211_STYPE_REASSOC_REQ); |
|
mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); |
|
mgmt->u.reassoc_req.listen_interval = listen_int; |
|
memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, |
|
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); |
|
mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); |
|
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); |
|
|
|
if (sband->band == NL80211_BAND_S1GHZ) |
|
goto skip_rates; |
|
|
|
/* add all rates which were marked to be used above */ |
|
supp_rates_len = rates_len; |
|
if (supp_rates_len > 8) |
|
supp_rates_len = 8; |
|
|
|
pos = skb_put(skb, supp_rates_len + 2); |
|
*pos++ = WLAN_EID_SUPP_RATES; |
|
*pos++ = supp_rates_len; |
|
|
|
count = 0; |
|
for (i = 0; i < sband->n_bitrates; i++) { |
|
if (BIT(i) & rates) { |
|
int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, |
|
5 * (1 << shift)); |
|
*pos++ = (u8) rate; |
|
if (++count == 8) |
|
break; |
|
} |
|
} |
|
|
|
if (rates_len > count) { |
|
pos = skb_put(skb, rates_len - count + 2); |
|
*pos++ = WLAN_EID_EXT_SUPP_RATES; |
|
*pos++ = rates_len - count; |
|
|
|
for (i++; i < sband->n_bitrates; i++) { |
|
if (BIT(i) & rates) { |
|
int rate; |
|
rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, |
|
5 * (1 << shift)); |
|
*pos++ = (u8) rate; |
|
} |
|
} |
|
} |
|
|
|
skip_rates: |
|
if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || |
|
capab & WLAN_CAPABILITY_RADIO_MEASURE) { |
|
pos = skb_put(skb, 4); |
|
*pos++ = WLAN_EID_PWR_CAPABILITY; |
|
*pos++ = 2; |
|
*pos++ = 0; /* min tx power */ |
|
/* max tx power */ |
|
*pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); |
|
} |
|
|
|
/* |
|
* 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++) { |
|
*pos++ = ieee80211_frequency_to_channel( |
|
sband->channels[i].center_freq); |
|
*pos++ = 1; /* one channel in the subband*/ |
|
} |
|
} |
|
|
|
/* Set MBSSID support for HE AP if needed */ |
|
if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && |
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len && |
|
ext_capa && ext_capa->datalen >= 3) |
|
ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; |
|
|
|
/* if present, add any custom IEs that go before HT */ |
|
if (assoc_data->ie_len) { |
|
static const u8 before_ht[] = { |
|
WLAN_EID_SSID, |
|
WLAN_EID_SUPP_RATES, |
|
WLAN_EID_EXT_SUPP_RATES, |
|
WLAN_EID_PWR_CAPABILITY, |
|
WLAN_EID_SUPPORTED_CHANNELS, |
|
WLAN_EID_RSN, |
|
WLAN_EID_QOS_CAPA, |
|
WLAN_EID_RRM_ENABLED_CAPABILITIES, |
|
WLAN_EID_MOBILITY_DOMAIN, |
|
WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ |
|
WLAN_EID_RIC_DATA, /* reassoc only */ |
|
WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
|
}; |
|
static const u8 after_ric[] = { |
|
WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
|
WLAN_EID_HT_CAPABILITY, |
|
WLAN_EID_BSS_COEX_2040, |
|
/* luckily this is almost always there */ |
|
WLAN_EID_EXT_CAPABILITY, |
|
WLAN_EID_QOS_TRAFFIC_CAPA, |
|
WLAN_EID_TIM_BCAST_REQ, |
|
WLAN_EID_INTERWORKING, |
|
/* 60 GHz (Multi-band, DMG, MMS) can't happen */ |
|
WLAN_EID_VHT_CAPABILITY, |
|
WLAN_EID_OPMODE_NOTIF, |
|
}; |
|
|
|
noffset = ieee80211_ie_split_ric(assoc_data->ie, |
|
assoc_data->ie_len, |
|
before_ht, |
|
ARRAY_SIZE(before_ht), |
|
after_ric, |
|
ARRAY_SIZE(after_ric), |
|
offset); |
|
skb_put_data(skb, assoc_data->ie + offset, noffset - offset); |
|
offset = noffset; |
|
} |
|
|
|
if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
|
|
|
if (sband->band != NL80211_BAND_6GHZ && |
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
|
ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, |
|
sband, chan, sdata->smps_mode); |
|
|
|
/* if present, add any custom IEs that go before VHT */ |
|
if (assoc_data->ie_len) { |
|
static const u8 before_vht[] = { |
|
/* |
|
* no need to list the ones split off before HT |
|
* or generated here |
|
*/ |
|
WLAN_EID_BSS_COEX_2040, |
|
WLAN_EID_EXT_CAPABILITY, |
|
WLAN_EID_QOS_TRAFFIC_CAPA, |
|
WLAN_EID_TIM_BCAST_REQ, |
|
WLAN_EID_INTERWORKING, |
|
/* 60 GHz (Multi-band, DMG, MMS) can't happen */ |
|
}; |
|
|
|
/* RIC already taken above, so no need to handle here anymore */ |
|
noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, |
|
before_vht, ARRAY_SIZE(before_vht), |
|
offset); |
|
skb_put_data(skb, assoc_data->ie + offset, noffset - offset); |
|
offset = noffset; |
|
} |
|
|
|
/* if present, add any custom IEs that go before HE */ |
|
if (assoc_data->ie_len) { |
|
static const u8 before_he[] = { |
|
/* |
|
* no need to list the ones split off before VHT |
|
* or generated here |
|
*/ |
|
WLAN_EID_OPMODE_NOTIF, |
|
WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, |
|
/* 11ai elements */ |
|
WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, |
|
WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, |
|
WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, |
|
WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, |
|
WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, |
|
/* TODO: add 11ah/11aj/11ak elements */ |
|
}; |
|
|
|
/* RIC already taken above, so no need to handle here anymore */ |
|
noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, |
|
before_he, ARRAY_SIZE(before_he), |
|
offset); |
|
pos = skb_put(skb, noffset - offset); |
|
memcpy(pos, assoc_data->ie + offset, noffset - offset); |
|
offset = noffset; |
|
} |
|
|
|
if (sband->band != NL80211_BAND_6GHZ && |
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
|
ieee80211_add_vht_ie(sdata, skb, sband, |
|
&assoc_data->ap_vht_cap); |
|
|
|
/* |
|
* If AP doesn't support HT, mark HE as disabled. |
|
* If on the 5GHz band, make sure it supports VHT. |
|
*/ |
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || |
|
(sband->band == NL80211_BAND_5GHZ && |
|
ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HE; |
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) |
|
ieee80211_add_he_ie(sdata, skb, sband); |
|
|
|
/* if present, add any custom non-vendor IEs that go after HE */ |
|
if (assoc_data->ie_len) { |
|
noffset = ieee80211_ie_split_vendor(assoc_data->ie, |
|
assoc_data->ie_len, |
|
offset); |
|
skb_put_data(skb, assoc_data->ie + offset, noffset - offset); |
|
offset = noffset; |
|
} |
|
|
|
if (assoc_data->wmm) { |
|
if (assoc_data->uapsd) { |
|
qos_info = ifmgd->uapsd_queues; |
|
qos_info |= (ifmgd->uapsd_max_sp_len << |
|
IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); |
|
} else { |
|
qos_info = 0; |
|
} |
|
|
|
pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); |
|
} |
|
|
|
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); |
|
|
|
/* add any remaining custom (i.e. vendor specific here) IEs */ |
|
if (assoc_data->ie_len) { |
|
noffset = assoc_data->ie_len; |
|
skb_put_data(skb, assoc_data->ie + offset, noffset - offset); |
|
} |
|
|
|
if (assoc_data->fils_kek_len) { |
|
ret = fils_encrypt_assoc_req(skb, assoc_data); |
|
if (ret < 0) { |
|
dev_kfree_skb(skb); |
|
return ret; |
|
} |
|
} |
|
|
|
pos = skb_tail_pointer(skb); |
|
kfree(ifmgd->assoc_req_ies); |
|
ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); |
|
if (!ifmgd->assoc_req_ies) { |
|
dev_kfree_skb(skb); |
|
return -ENOMEM; |
|
} |
|
|
|
ifmgd->assoc_req_ies_len = pos - ie_start; |
|
|
|
drv_mgd_prepare_tx(local, sdata, &info); |
|
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
|
if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | |
|
IEEE80211_TX_INTFL_MLME_CONN_TX; |
|
ieee80211_tx_skb(sdata, skb); |
|
|
|
return 0; |
|
} |
|
|
|
void ieee80211_send_pspoll(struct ieee80211_local *local, |
|
struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_pspoll *pspoll; |
|
struct sk_buff *skb; |
|
|
|
skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
|
if (!skb) |
|
return; |
|
|
|
pspoll = (struct ieee80211_pspoll *) skb->data; |
|
pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
|
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
|
ieee80211_tx_skb(sdata, skb); |
|
} |
|
|
|
void ieee80211_send_nullfunc(struct ieee80211_local *local, |
|
struct ieee80211_sub_if_data *sdata, |
|
bool powersave) |
|
{ |
|
struct sk_buff *skb; |
|
struct ieee80211_hdr_3addr *nullfunc; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
|
|
skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, |
|
!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->u.mgd.bssid, ETH_ALEN); |
|
memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); |
|
memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); |
|
memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); |
|
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
|
ieee80211_tx_skb(sdata, skb); |
|
} |
|
|
|
/* spectrum management related things */ |
|
static void ieee80211_chswitch_work(struct work_struct *work) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = |
|
container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
int ret; |
|
|
|
if (!ieee80211_sdata_running(sdata)) |
|
return; |
|
|
|
sdata_lock(sdata); |
|
mutex_lock(&local->mtx); |
|
mutex_lock(&local->chanctx_mtx); |
|
|
|
if (!ifmgd->associated) |
|
goto out; |
|
|
|
if (!sdata->vif.csa_active) |
|
goto out; |
|
|
|
/* |
|
* using reservation isn't immediate as it may be deferred until later |
|
* with multi-vif. once reservation is complete it will re-schedule the |
|
* work with no reserved_chanctx so verify chandef to check if it |
|
* completed successfully |
|
*/ |
|
|
|
if (sdata->reserved_chanctx) { |
|
/* |
|
* with multi-vif csa driver may call ieee80211_csa_finish() |
|
* many times while waiting for other interfaces to use their |
|
* reservations |
|
*/ |
|
if (sdata->reserved_ready) |
|
goto out; |
|
|
|
ret = ieee80211_vif_use_reserved_context(sdata); |
|
if (ret) { |
|
sdata_info(sdata, |
|
"failed to use reserved channel context, disconnecting (err=%d)\n", |
|
ret); |
|
ieee80211_queue_work(&sdata->local->hw, |
|
&ifmgd->csa_connection_drop_work); |
|
goto out; |
|
} |
|
|
|
goto out; |
|
} |
|
|
|
if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, |
|
&sdata->csa_chandef)) { |
|
sdata_info(sdata, |
|
"failed to finalize channel switch, disconnecting\n"); |
|
ieee80211_queue_work(&sdata->local->hw, |
|
&ifmgd->csa_connection_drop_work); |
|
goto out; |
|
} |
|
|
|
ifmgd->csa_waiting_bcn = true; |
|
|
|
ieee80211_sta_reset_beacon_monitor(sdata); |
|
ieee80211_sta_reset_conn_monitor(sdata); |
|
|
|
out: |
|
mutex_unlock(&local->chanctx_mtx); |
|
mutex_unlock(&local->mtx); |
|
sdata_unlock(sdata); |
|
} |
|
|
|
static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
int ret; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
WARN_ON(!sdata->vif.csa_active); |
|
|
|
if (sdata->csa_block_tx) { |
|
ieee80211_wake_vif_queues(local, sdata, |
|
IEEE80211_QUEUE_STOP_REASON_CSA); |
|
sdata->csa_block_tx = false; |
|
} |
|
|
|
sdata->vif.csa_active = false; |
|
ifmgd->csa_waiting_bcn = false; |
|
/* |
|
* If the CSA IE is still present on the beacon after the switch, |
|
* we need to consider it as a new CSA (possibly to self). |
|
*/ |
|
ifmgd->beacon_crc_valid = false; |
|
|
|
ret = drv_post_channel_switch(sdata); |
|
if (ret) { |
|
sdata_info(sdata, |
|
"driver post channel switch failed, disconnecting\n"); |
|
ieee80211_queue_work(&local->hw, |
|
&ifmgd->csa_connection_drop_work); |
|
return; |
|
} |
|
|
|
cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); |
|
} |
|
|
|
void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
|
|
trace_api_chswitch_done(sdata, success); |
|
if (!success) { |
|
sdata_info(sdata, |
|
"driver channel switch failed, disconnecting\n"); |
|
ieee80211_queue_work(&sdata->local->hw, |
|
&ifmgd->csa_connection_drop_work); |
|
} else { |
|
ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
|
} |
|
} |
|
EXPORT_SYMBOL(ieee80211_chswitch_done); |
|
|
|
static void ieee80211_chswitch_timer(struct timer_list *t) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = |
|
from_timer(sdata, t, u.mgd.chswitch_timer); |
|
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); |
|
} |
|
|
|
static void |
|
ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
|
|
if (!local->ops->abort_channel_switch) |
|
return; |
|
|
|
mutex_lock(&local->mtx); |
|
|
|
mutex_lock(&local->chanctx_mtx); |
|
ieee80211_vif_unreserve_chanctx(sdata); |
|
mutex_unlock(&local->chanctx_mtx); |
|
|
|
if (sdata->csa_block_tx) |
|
ieee80211_wake_vif_queues(local, sdata, |
|
IEEE80211_QUEUE_STOP_REASON_CSA); |
|
|
|
sdata->csa_block_tx = false; |
|
sdata->vif.csa_active = false; |
|
|
|
mutex_unlock(&local->mtx); |
|
|
|
drv_abort_channel_switch(sdata); |
|
} |
|
|
|
static void |
|
ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, |
|
u64 timestamp, u32 device_timestamp, |
|
struct ieee802_11_elems *elems, |
|
bool beacon) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct cfg80211_bss *cbss = ifmgd->associated; |
|
struct ieee80211_chanctx_conf *conf; |
|
struct ieee80211_chanctx *chanctx; |
|
enum nl80211_band current_band; |
|
struct ieee80211_csa_ie csa_ie; |
|
struct ieee80211_channel_switch ch_switch; |
|
struct ieee80211_bss *bss; |
|
int res; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
if (!cbss) |
|
return; |
|
|
|
if (local->scanning) |
|
return; |
|
|
|
current_band = cbss->channel->band; |
|
bss = (void *)cbss->priv; |
|
res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, |
|
bss->vht_cap_info, |
|
ifmgd->flags, |
|
ifmgd->associated->bssid, &csa_ie); |
|
|
|
if (!res) { |
|
ch_switch.timestamp = timestamp; |
|
ch_switch.device_timestamp = device_timestamp; |
|
ch_switch.block_tx = csa_ie.mode; |
|
ch_switch.chandef = csa_ie.chandef; |
|
ch_switch.count = csa_ie.count; |
|
ch_switch.delay = csa_ie.max_switch_time; |
|
} |
|
|
|
if (res < 0) |
|
goto lock_and_drop_connection; |
|
|
|
if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { |
|
if (res) |
|
ieee80211_sta_abort_chanswitch(sdata); |
|
else |
|
drv_channel_switch_rx_beacon(sdata, &ch_switch); |
|
return; |
|
} else if (sdata->vif.csa_active || res) { |
|
/* disregard subsequent announcements if already processing */ |
|
return; |
|
} |
|
|
|
if (sdata->vif.bss_conf.chandef.chan->band != |
|
csa_ie.chandef.chan->band) { |
|
sdata_info(sdata, |
|
"AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", |
|
ifmgd->associated->bssid, |
|
csa_ie.chandef.chan->center_freq, |
|
csa_ie.chandef.width, csa_ie.chandef.center_freq1, |
|
csa_ie.chandef.center_freq2); |
|
goto lock_and_drop_connection; |
|
} |
|
|
|
if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, |
|
IEEE80211_CHAN_DISABLED)) { |
|
sdata_info(sdata, |
|
"AP %pM switches to unsupported channel " |
|
"(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " |
|
"disconnecting\n", |
|
ifmgd->associated->bssid, |
|
csa_ie.chandef.chan->center_freq, |
|
csa_ie.chandef.chan->freq_offset, |
|
csa_ie.chandef.width, csa_ie.chandef.center_freq1, |
|
csa_ie.chandef.freq1_offset, |
|
csa_ie.chandef.center_freq2); |
|
goto lock_and_drop_connection; |
|
} |
|
|
|
if (cfg80211_chandef_identical(&csa_ie.chandef, |
|
&sdata->vif.bss_conf.chandef) && |
|
(!csa_ie.mode || !beacon)) { |
|
if (ifmgd->csa_ignored_same_chan) |
|
return; |
|
sdata_info(sdata, |
|
"AP %pM tries to chanswitch to same channel, ignore\n", |
|
ifmgd->associated->bssid); |
|
ifmgd->csa_ignored_same_chan = true; |
|
return; |
|
} |
|
|
|
/* |
|
* Drop all TDLS peers - either we disconnect or move to a different |
|
* channel from this point on. There's no telling what our peer will do. |
|
* The TDLS WIDER_BW scenario is also problematic, as peers might now |
|
* have an incompatible wider chandef. |
|
*/ |
|
ieee80211_teardown_tdls_peers(sdata); |
|
|
|
mutex_lock(&local->mtx); |
|
mutex_lock(&local->chanctx_mtx); |
|
conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
|
lockdep_is_held(&local->chanctx_mtx)); |
|
if (!conf) { |
|
sdata_info(sdata, |
|
"no channel context assigned to vif?, disconnecting\n"); |
|
goto drop_connection; |
|
} |
|
|
|
chanctx = container_of(conf, struct ieee80211_chanctx, conf); |
|
|
|
if (local->use_chanctx && |
|
!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { |
|
sdata_info(sdata, |
|
"driver doesn't support chan-switch with channel contexts\n"); |
|
goto drop_connection; |
|
} |
|
|
|
if (drv_pre_channel_switch(sdata, &ch_switch)) { |
|
sdata_info(sdata, |
|
"preparing for channel switch failed, disconnecting\n"); |
|
goto drop_connection; |
|
} |
|
|
|
res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, |
|
chanctx->mode, false); |
|
if (res) { |
|
sdata_info(sdata, |
|
"failed to reserve channel context for channel switch, disconnecting (err=%d)\n", |
|
res); |
|
goto drop_connection; |
|
} |
|
mutex_unlock(&local->chanctx_mtx); |
|
|
|
sdata->vif.csa_active = true; |
|
sdata->csa_chandef = csa_ie.chandef; |
|
sdata->csa_block_tx = csa_ie.mode; |
|
ifmgd->csa_ignored_same_chan = false; |
|
ifmgd->beacon_crc_valid = false; |
|
|
|
if (sdata->csa_block_tx) |
|
ieee80211_stop_vif_queues(local, sdata, |
|
IEEE80211_QUEUE_STOP_REASON_CSA); |
|
mutex_unlock(&local->mtx); |
|
|
|
cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, |
|
csa_ie.count, csa_ie.mode); |
|
|
|
if (local->ops->channel_switch) { |
|
/* use driver's channel switch callback */ |
|
drv_channel_switch(local, sdata, &ch_switch); |
|
return; |
|
} |
|
|
|
/* channel switch handled in software */ |
|
if (csa_ie.count <= 1) |
|
ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); |
|
else |
|
mod_timer(&ifmgd->chswitch_timer, |
|
TU_TO_EXP_TIME((csa_ie.count - 1) * |
|
cbss->beacon_interval)); |
|
return; |
|
lock_and_drop_connection: |
|
mutex_lock(&local->mtx); |
|
mutex_lock(&local->chanctx_mtx); |
|
drop_connection: |
|
/* |
|
* This is just so that the disconnect flow will know that |
|
* we were trying to switch channel and failed. In case the |
|
* mode is 1 (we are not allowed to Tx), we will know not to |
|
* send a deauthentication frame. Those two fields will be |
|
* reset when the disconnection worker runs. |
|
*/ |
|
sdata->vif.csa_active = true; |
|
sdata->csa_block_tx = csa_ie.mode; |
|
|
|
ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); |
|
mutex_unlock(&local->chanctx_mtx); |
|
mutex_unlock(&local->mtx); |
|
} |
|
|
|
static bool |
|
ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_channel *channel, |
|
const u8 *country_ie, u8 country_ie_len, |
|
const u8 *pwr_constr_elem, |
|
int *chan_pwr, int *pwr_reduction) |
|
{ |
|
struct ieee80211_country_ie_triplet *triplet; |
|
int chan = ieee80211_frequency_to_channel(channel->center_freq); |
|
int i, chan_increment; |
|
bool have_chan_pwr = false; |
|
|
|
/* Invalid IE */ |
|
if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) |
|
return false; |
|
|
|
triplet = (void *)(country_ie + 3); |
|
country_ie_len -= 3; |
|
|
|
switch (channel->band) { |
|
default: |
|
WARN_ON_ONCE(1); |
|
fallthrough; |
|
case NL80211_BAND_2GHZ: |
|
case NL80211_BAND_60GHZ: |
|
case NL80211_BAND_LC: |
|
chan_increment = 1; |
|
break; |
|
case NL80211_BAND_5GHZ: |
|
chan_increment = 4; |
|
break; |
|
case NL80211_BAND_6GHZ: |
|
/* |
|
* In the 6 GHz band, the "maximum transmit power level" |
|
* field in the triplets is reserved, and thus will be |
|
* zero and we shouldn't use it to control TX power. |
|
* The actual TX power will be given in the transmit |
|
* power envelope element instead. |
|
*/ |
|
return false; |
|
} |
|
|
|
/* find channel */ |
|
while (country_ie_len >= 3) { |
|
u8 first_channel = triplet->chans.first_channel; |
|
|
|
if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) |
|
goto next; |
|
|
|
for (i = 0; i < triplet->chans.num_channels; i++) { |
|
if (first_channel + i * chan_increment == chan) { |
|
have_chan_pwr = true; |
|
*chan_pwr = triplet->chans.max_power; |
|
break; |
|
} |
|
} |
|
if (have_chan_pwr) |
|
break; |
|
|
|
next: |
|
triplet++; |
|
country_ie_len -= 3; |
|
} |
|
|
|
if (have_chan_pwr && pwr_constr_elem) |
|
*pwr_reduction = *pwr_constr_elem; |
|
else |
|
*pwr_reduction = 0; |
|
|
|
return have_chan_pwr; |
|
} |
|
|
|
static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_channel *channel, |
|
const u8 *cisco_dtpc_ie, |
|
int *pwr_level) |
|
{ |
|
/* From practical testing, the first data byte of the DTPC element |
|
* seems to contain the requested dBm level, and the CLI on Cisco |
|
* APs clearly state the range is -127 to 127 dBm, which indicates |
|
* a signed byte, although it seemingly never actually goes negative. |
|
* The other byte seems to always be zero. |
|
*/ |
|
*pwr_level = (__s8)cisco_dtpc_ie[4]; |
|
} |
|
|
|
static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_channel *channel, |
|
struct ieee80211_mgmt *mgmt, |
|
const u8 *country_ie, u8 country_ie_len, |
|
const u8 *pwr_constr_ie, |
|
const u8 *cisco_dtpc_ie) |
|
{ |
|
bool has_80211h_pwr = false, has_cisco_pwr = false; |
|
int chan_pwr = 0, pwr_reduction_80211h = 0; |
|
int pwr_level_cisco, pwr_level_80211h; |
|
int new_ap_level; |
|
__le16 capab = mgmt->u.probe_resp.capab_info; |
|
|
|
if (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 (sdata->ap_power_level == new_ap_level) |
|
return 0; |
|
|
|
sdata_dbg(sdata, |
|
"Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", |
|
pwr_level_80211h, chan_pwr, pwr_reduction_80211h, |
|
sdata->u.mgd.bssid); |
|
} else { /* has_cisco_pwr is always true here. */ |
|
new_ap_level = pwr_level_cisco; |
|
|
|
if (sdata->ap_power_level == new_ap_level) |
|
return 0; |
|
|
|
sdata_dbg(sdata, |
|
"Limiting TX power to %d dBm as advertised by %pM\n", |
|
pwr_level_cisco, sdata->u.mgd.bssid); |
|
} |
|
|
|
sdata->ap_power_level = new_ap_level; |
|
if (__ieee80211_recalc_txpower(sdata)) |
|
return BSS_CHANGED_TXPOWER; |
|
return 0; |
|
} |
|
|
|
/* powersave */ |
|
static void ieee80211_enable_ps(struct ieee80211_local *local, |
|
struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_conf *conf = &local->hw.conf; |
|
|
|
/* |
|
* If we are scanning right now then the parameters will |
|
* take effect when scan finishes. |
|
*/ |
|
if (local->scanning) |
|
return; |
|
|
|
if (conf->dynamic_ps_timeout > 0 && |
|
!ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { |
|
mod_timer(&local->dynamic_ps_timer, jiffies + |
|
msecs_to_jiffies(conf->dynamic_ps_timeout)); |
|
} else { |
|
if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) |
|
ieee80211_send_nullfunc(local, sdata, true); |
|
|
|
if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && |
|
ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
|
return; |
|
|
|
conf->flags |= IEEE80211_CONF_PS; |
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
|
} |
|
} |
|
|
|
static void ieee80211_change_ps(struct ieee80211_local *local) |
|
{ |
|
struct ieee80211_conf *conf = &local->hw.conf; |
|
|
|
if (local->ps_sdata) { |
|
ieee80211_enable_ps(local, local->ps_sdata); |
|
} else if (conf->flags & IEEE80211_CONF_PS) { |
|
conf->flags &= ~IEEE80211_CONF_PS; |
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
|
del_timer_sync(&local->dynamic_ps_timer); |
|
cancel_work_sync(&local->dynamic_ps_enable_work); |
|
} |
|
} |
|
|
|
static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_if_managed *mgd = &sdata->u.mgd; |
|
struct sta_info *sta = NULL; |
|
bool authorized = false; |
|
|
|
if (!mgd->powersave) |
|
return false; |
|
|
|
if (mgd->broken_ap) |
|
return false; |
|
|
|
if (!mgd->associated) |
|
return false; |
|
|
|
if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) |
|
return false; |
|
|
|
if (!mgd->have_beacon) |
|
return false; |
|
|
|
rcu_read_lock(); |
|
sta = sta_info_get(sdata, mgd->bssid); |
|
if (sta) |
|
authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
|
rcu_read_unlock(); |
|
|
|
return authorized; |
|
} |
|
|
|
/* need to hold RTNL or interface lock */ |
|
void ieee80211_recalc_ps(struct ieee80211_local *local) |
|
{ |
|
struct ieee80211_sub_if_data *sdata, *found = NULL; |
|
int count = 0; |
|
int timeout; |
|
|
|
if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { |
|
local->ps_sdata = NULL; |
|
return; |
|
} |
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) { |
|
if (!ieee80211_sdata_running(sdata)) |
|
continue; |
|
if (sdata->vif.type == NL80211_IFTYPE_AP) { |
|
/* If an AP vif is found, then disable PS |
|
* by setting the count to zero thereby setting |
|
* ps_sdata to NULL. |
|
*/ |
|
count = 0; |
|
break; |
|
} |
|
if (sdata->vif.type != NL80211_IFTYPE_STATION) |
|
continue; |
|
found = sdata; |
|
count++; |
|
} |
|
|
|
if (count == 1 && ieee80211_powersave_allowed(found)) { |
|
u8 dtimper = found->u.mgd.dtim_period; |
|
|
|
timeout = local->dynamic_ps_forced_timeout; |
|
if (timeout < 0) |
|
timeout = 100; |
|
local->hw.conf.dynamic_ps_timeout = timeout; |
|
|
|
/* If the TIM IE is invalid, pretend the value is 1 */ |
|
if (!dtimper) |
|
dtimper = 1; |
|
|
|
local->hw.conf.ps_dtim_period = dtimper; |
|
local->ps_sdata = found; |
|
} else { |
|
local->ps_sdata = NULL; |
|
} |
|
|
|
ieee80211_change_ps(local); |
|
} |
|
|
|
void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
bool ps_allowed = ieee80211_powersave_allowed(sdata); |
|
|
|
if (sdata->vif.bss_conf.ps != ps_allowed) { |
|
sdata->vif.bss_conf.ps = ps_allowed; |
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); |
|
} |
|
} |
|
|
|
void ieee80211_dynamic_ps_disable_work(struct work_struct *work) |
|
{ |
|
struct ieee80211_local *local = |
|
container_of(work, struct ieee80211_local, |
|
dynamic_ps_disable_work); |
|
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
|
local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
|
} |
|
|
|
ieee80211_wake_queues_by_reason(&local->hw, |
|
IEEE80211_MAX_QUEUE_MAP, |
|
IEEE80211_QUEUE_STOP_REASON_PS, |
|
false); |
|
} |
|
|
|
void ieee80211_dynamic_ps_enable_work(struct work_struct *work) |
|
{ |
|
struct ieee80211_local *local = |
|
container_of(work, struct ieee80211_local, |
|
dynamic_ps_enable_work); |
|
struct ieee80211_sub_if_data *sdata = local->ps_sdata; |
|
struct ieee80211_if_managed *ifmgd; |
|
unsigned long flags; |
|
int q; |
|
|
|
/* can only happen when PS was just disabled anyway */ |
|
if (!sdata) |
|
return; |
|
|
|
ifmgd = &sdata->u.mgd; |
|
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS) |
|
return; |
|
|
|
if (local->hw.conf.dynamic_ps_timeout > 0) { |
|
/* don't enter PS if TX frames are pending */ |
|
if (drv_tx_frames_pending(local)) { |
|
mod_timer(&local->dynamic_ps_timer, jiffies + |
|
msecs_to_jiffies( |
|
local->hw.conf.dynamic_ps_timeout)); |
|
return; |
|
} |
|
|
|
/* |
|
* transmission can be stopped by others which leads to |
|
* dynamic_ps_timer expiry. Postpone the ps timer if it |
|
* is not the actual idle state. |
|
*/ |
|
spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
|
for (q = 0; q < local->hw.queues; q++) { |
|
if (local->queue_stop_reasons[q]) { |
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
|
flags); |
|
mod_timer(&local->dynamic_ps_timer, jiffies + |
|
msecs_to_jiffies( |
|
local->hw.conf.dynamic_ps_timeout)); |
|
return; |
|
} |
|
} |
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
|
} |
|
|
|
if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && |
|
!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
|
if (drv_tx_frames_pending(local)) { |
|
mod_timer(&local->dynamic_ps_timer, jiffies + |
|
msecs_to_jiffies( |
|
local->hw.conf.dynamic_ps_timeout)); |
|
} else { |
|
ieee80211_send_nullfunc(local, sdata, true); |
|
/* Flush to get the tx status of nullfunc frame */ |
|
ieee80211_flush_queues(local, sdata, false); |
|
} |
|
} |
|
|
|
if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && |
|
ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || |
|
(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
|
ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
|
local->hw.conf.flags |= IEEE80211_CONF_PS; |
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
|
} |
|
} |
|
|
|
void ieee80211_dynamic_ps_timer(struct timer_list *t) |
|
{ |
|
struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); |
|
|
|
ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
|
} |
|
|
|
void ieee80211_dfs_cac_timer_work(struct work_struct *work) |
|
{ |
|
struct delayed_work *delayed_work = to_delayed_work(work); |
|
struct ieee80211_sub_if_data *sdata = |
|
container_of(delayed_work, struct ieee80211_sub_if_data, |
|
dfs_cac_timer_work); |
|
struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; |
|
|
|
mutex_lock(&sdata->local->mtx); |
|
if (sdata->wdev.cac_started) { |
|
ieee80211_vif_release_channel(sdata); |
|
cfg80211_cac_event(sdata->dev, &chandef, |
|
NL80211_RADAR_CAC_FINISHED, |
|
GFP_KERNEL); |
|
} |
|
mutex_unlock(&sdata->local->mtx); |
|
} |
|
|
|
static bool |
|
__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
bool ret = false; |
|
int ac; |
|
|
|
if (local->hw.queues < IEEE80211_NUM_ACS) |
|
return false; |
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
|
struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; |
|
int non_acm_ac; |
|
unsigned long now = jiffies; |
|
|
|
if (tx_tspec->action == TX_TSPEC_ACTION_NONE && |
|
tx_tspec->admitted_time && |
|
time_after(now, tx_tspec->time_slice_start + HZ)) { |
|
tx_tspec->consumed_tx_time = 0; |
|
tx_tspec->time_slice_start = now; |
|
|
|
if (tx_tspec->downgraded) |
|
tx_tspec->action = |
|
TX_TSPEC_ACTION_STOP_DOWNGRADE; |
|
} |
|
|
|
switch (tx_tspec->action) { |
|
case TX_TSPEC_ACTION_STOP_DOWNGRADE: |
|
/* take the original parameters */ |
|
if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) |
|
sdata_err(sdata, |
|
"failed to set TX queue parameters for queue %d\n", |
|
ac); |
|
tx_tspec->action = TX_TSPEC_ACTION_NONE; |
|
tx_tspec->downgraded = false; |
|
ret = true; |
|
break; |
|
case TX_TSPEC_ACTION_DOWNGRADE: |
|
if (time_after(now, tx_tspec->time_slice_start + HZ)) { |
|
tx_tspec->action = TX_TSPEC_ACTION_NONE; |
|
ret = true; |
|
break; |
|
} |
|
/* downgrade next lower non-ACM AC */ |
|
for (non_acm_ac = ac + 1; |
|
non_acm_ac < IEEE80211_NUM_ACS; |
|
non_acm_ac++) |
|
if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) |
|
break; |
|
/* Usually the loop will result in using BK even if it |
|
* requires admission control, but such a configuration |
|
* makes no sense and we have to transmit somehow - the |
|
* AC selection does the same thing. |
|
* If we started out trying to downgrade from BK, then |
|
* the extra condition here might be needed. |
|
*/ |
|
if (non_acm_ac >= IEEE80211_NUM_ACS) |
|
non_acm_ac = IEEE80211_AC_BK; |
|
if (drv_conf_tx(local, sdata, ac, |
|
&sdata->tx_conf[non_acm_ac])) |
|
sdata_err(sdata, |
|
"failed to set TX queue parameters for queue %d\n", |
|
ac); |
|
tx_tspec->action = TX_TSPEC_ACTION_NONE; |
|
ret = true; |
|
schedule_delayed_work(&ifmgd->tx_tspec_wk, |
|
tx_tspec->time_slice_start + HZ - now + 1); |
|
break; |
|
case TX_TSPEC_ACTION_NONE: |
|
/* nothing now */ |
|
break; |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
if (__ieee80211_sta_handle_tspec_ac_params(sdata)) |
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); |
|
} |
|
|
|
static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) |
|
{ |
|
struct ieee80211_sub_if_data *sdata; |
|
|
|
sdata = container_of(work, struct ieee80211_sub_if_data, |
|
u.mgd.tx_tspec_wk.work); |
|
ieee80211_sta_handle_tspec_ac_params(sdata); |
|
} |
|
|
|
/* MLME */ |
|
static bool |
|
ieee80211_sta_wmm_params(struct ieee80211_local *local, |
|
struct ieee80211_sub_if_data *sdata, |
|
const u8 *wmm_param, size_t wmm_param_len, |
|
const struct ieee80211_mu_edca_param_set *mu_edca) |
|
{ |
|
struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
size_t left; |
|
int count, 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 == ifmgd->wmm_last_param_set && |
|
mu_edca_count == ifmgd->mu_edca_last_param_set) |
|
return false; |
|
ifmgd->wmm_last_param_set = count; |
|
ifmgd->mu_edca_last_param_set = mu_edca_count; |
|
|
|
pos = wmm_param + 8; |
|
left = wmm_param_len - 8; |
|
|
|
memset(¶ms, 0, sizeof(params)); |
|
|
|
sdata->wmm_acm = 0; |
|
for (; left >= 4; left -= 4, pos += 4) { |
|
int aci = (pos[0] >> 5) & 0x03; |
|
int acm = (pos[0] >> 4) & 0x01; |
|
bool uapsd = false; |
|
|
|
switch (aci) { |
|
case 1: /* AC_BK */ |
|
ac = IEEE80211_AC_BK; |
|
if (acm) |
|
sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
|
uapsd = true; |
|
params[ac].mu_edca = !!mu_edca; |
|
if (mu_edca) |
|
params[ac].mu_edca_param_rec = mu_edca->ac_bk; |
|
break; |
|
case 2: /* AC_VI */ |
|
ac = IEEE80211_AC_VI; |
|
if (acm) |
|
sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
|
uapsd = true; |
|
params[ac].mu_edca = !!mu_edca; |
|
if (mu_edca) |
|
params[ac].mu_edca_param_rec = mu_edca->ac_vi; |
|
break; |
|
case 3: /* AC_VO */ |
|
ac = IEEE80211_AC_VO; |
|
if (acm) |
|
sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
|
uapsd = true; |
|
params[ac].mu_edca = !!mu_edca; |
|
if (mu_edca) |
|
params[ac].mu_edca_param_rec = mu_edca->ac_vo; |
|
break; |
|
case 0: /* AC_BE */ |
|
default: |
|
ac = IEEE80211_AC_BE; |
|
if (acm) |
|
sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
|
uapsd = true; |
|
params[ac].mu_edca = !!mu_edca; |
|
if (mu_edca) |
|
params[ac].mu_edca_param_rec = mu_edca->ac_be; |
|
break; |
|
} |
|
|
|
params[ac].aifs = pos[0] & 0x0f; |
|
|
|
if (params[ac].aifs < 2) { |
|
sdata_info(sdata, |
|
"AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", |
|
params[ac].aifs, aci); |
|
params[ac].aifs = 2; |
|
} |
|
params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); |
|
params[ac].cw_min = ecw2cw(pos[1] & 0x0f); |
|
params[ac].txop = get_unaligned_le16(pos + 2); |
|
params[ac].acm = acm; |
|
params[ac].uapsd = uapsd; |
|
|
|
if (params[ac].cw_min == 0 || |
|
params[ac].cw_min > params[ac].cw_max) { |
|
sdata_info(sdata, |
|
"AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", |
|
params[ac].cw_min, params[ac].cw_max, aci); |
|
return false; |
|
} |
|
ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); |
|
} |
|
|
|
/* WMM specification requires all 4 ACIs. */ |
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
|
if (params[ac].cw_min == 0) { |
|
sdata_info(sdata, |
|
"AP has invalid WMM params (missing AC %d), using defaults\n", |
|
ac); |
|
return false; |
|
} |
|
} |
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
|
mlme_dbg(sdata, |
|
"WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", |
|
ac, params[ac].acm, |
|
params[ac].aifs, params[ac].cw_min, params[ac].cw_max, |
|
params[ac].txop, params[ac].uapsd, |
|
ifmgd->tx_tspec[ac].downgraded); |
|
sdata->tx_conf[ac] = params[ac]; |
|
if (!ifmgd->tx_tspec[ac].downgraded && |
|
drv_conf_tx(local, sdata, ac, ¶ms[ac])) |
|
sdata_err(sdata, |
|
"failed to set TX queue parameters for AC %d\n", |
|
ac); |
|
} |
|
|
|
/* enable WMM or activate new settings */ |
|
sdata->vif.bss_conf.qos = true; |
|
return true; |
|
} |
|
|
|
static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
lockdep_assert_held(&sdata->local->mtx); |
|
|
|
sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; |
|
ieee80211_run_deferred_scan(sdata->local); |
|
} |
|
|
|
static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
mutex_lock(&sdata->local->mtx); |
|
__ieee80211_stop_poll(sdata); |
|
mutex_unlock(&sdata->local->mtx); |
|
} |
|
|
|
static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
|
u16 capab, bool erp_valid, u8 erp) |
|
{ |
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
|
struct ieee80211_supported_band *sband; |
|
u32 changed = 0; |
|
bool use_protection; |
|
bool use_short_preamble; |
|
bool use_short_slot; |
|
|
|
sband = ieee80211_get_sband(sdata); |
|
if (!sband) |
|
return changed; |
|
|
|
if (erp_valid) { |
|
use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; |
|
use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; |
|
} else { |
|
use_protection = false; |
|
use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); |
|
} |
|
|
|
use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); |
|
if (sband->band == NL80211_BAND_5GHZ || |
|
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 void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
|
struct cfg80211_bss *cbss, |
|
u32 bss_info_changed) |
|
{ |
|
struct ieee80211_bss *bss = (void *)cbss->priv; |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
|
|
|
bss_info_changed |= BSS_CHANGED_ASSOC; |
|
bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
|
bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); |
|
|
|
sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( |
|
beacon_loss_count * bss_conf->beacon_int)); |
|
|
|
sdata->u.mgd.associated = cbss; |
|
memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); |
|
|
|
ieee80211_check_rate_mask(sdata); |
|
|
|
sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; |
|
|
|
if (sdata->vif.p2p || |
|
sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { |
|
const struct cfg80211_bss_ies *ies; |
|
|
|
rcu_read_lock(); |
|
ies = rcu_dereference(cbss->ies); |
|
if (ies) { |
|
int ret; |
|
|
|
ret = cfg80211_get_p2p_attr( |
|
ies->data, ies->len, |
|
IEEE80211_P2P_ATTR_ABSENCE_NOTICE, |
|
(u8 *) &bss_conf->p2p_noa_attr, |
|
sizeof(bss_conf->p2p_noa_attr)); |
|
if (ret >= 2) { |
|
sdata->u.mgd.p2p_noa_index = |
|
bss_conf->p2p_noa_attr.index; |
|
bss_info_changed |= BSS_CHANGED_P2P_PS; |
|
} |
|
} |
|
rcu_read_unlock(); |
|
} |
|
|
|
/* just to be sure */ |
|
ieee80211_stop_poll(sdata); |
|
|
|
ieee80211_led_assoc(local, 1); |
|
|
|
if (sdata->u.mgd.have_beacon) { |
|
/* |
|
* If the AP is buggy we may get here with no DTIM period |
|
* known, so assume it's 1 which is the only safe assumption |
|
* in that case, although if the TIM IE is broken powersave |
|
* probably just won't work at all. |
|
*/ |
|
bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; |
|
bss_conf->beacon_rate = bss->beacon_rate; |
|
bss_info_changed |= BSS_CHANGED_BEACON_INFO; |
|
} else { |
|
bss_conf->beacon_rate = NULL; |
|
bss_conf->dtim_period = 0; |
|
} |
|
|
|
bss_conf->assoc = 1; |
|
|
|
/* Tell the driver to monitor connection quality (if supported) */ |
|
if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && |
|
bss_conf->cqm_rssi_thold) |
|
bss_info_changed |= BSS_CHANGED_CQM; |
|
|
|
/* Enable ARP filtering */ |
|
if (bss_conf->arp_addr_cnt) |
|
bss_info_changed |= BSS_CHANGED_ARP_FILTER; |
|
|
|
ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
|
|
|
mutex_lock(&local->iflist_mtx); |
|
ieee80211_recalc_ps(local); |
|
mutex_unlock(&local->iflist_mtx); |
|
|
|
ieee80211_recalc_smps(sdata); |
|
ieee80211_recalc_ps_vif(sdata); |
|
|
|
netif_carrier_on(sdata->dev); |
|
} |
|
|
|
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
|
u16 stype, u16 reason, bool tx, |
|
u8 *frame_buf) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
|
u32 changed = 0; |
|
struct ieee80211_prep_tx_info info = { |
|
.subtype = stype, |
|
}; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
if (WARN_ON_ONCE(tx && !frame_buf)) |
|
return; |
|
|
|
if (WARN_ON(!ifmgd->associated)) |
|
return; |
|
|
|
ieee80211_stop_poll(sdata); |
|
|
|
ifmgd->associated = NULL; |
|
netif_carrier_off(sdata->dev); |
|
|
|
/* |
|
* if we want to get out of ps before disassoc (why?) we have |
|
* to do it before sending disassoc, as otherwise the null-packet |
|
* won't be valid. |
|
*/ |
|
if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
|
local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
|
} |
|
local->ps_sdata = NULL; |
|
|
|
/* disable per-vif ps */ |
|
ieee80211_recalc_ps_vif(sdata); |
|
|
|
/* make sure ongoing transmission finishes */ |
|
synchronize_net(); |
|
|
|
/* |
|
* drop any frame before deauth/disassoc, this can be data or |
|
* management frame. Since we are disconnecting, we should not |
|
* insist sending these frames which can take time and delay |
|
* the disconnection and possible the roaming. |
|
*/ |
|
if (tx) |
|
ieee80211_flush_queues(local, sdata, true); |
|
|
|
/* deauthenticate/disassociate now */ |
|
if (tx || frame_buf) { |
|
/* |
|
* In multi channel scenarios guarantee that the virtual |
|
* interface is granted immediate airtime to transmit the |
|
* deauthentication frame by calling mgd_prepare_tx, if the |
|
* driver requested so. |
|
*/ |
|
if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && |
|
!ifmgd->have_beacon) { |
|
drv_mgd_prepare_tx(sdata->local, sdata, &info); |
|
} |
|
|
|
ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, |
|
ifmgd->bssid, stype, reason, |
|
tx, frame_buf); |
|
} |
|
|
|
/* flush out frame - make sure the deauth was actually sent */ |
|
if (tx) |
|
ieee80211_flush_queues(local, sdata, false); |
|
|
|
drv_mgd_complete_tx(sdata->local, sdata, &info); |
|
|
|
/* clear bssid only after building the needed mgmt frames */ |
|
eth_zero_addr(ifmgd->bssid); |
|
|
|
sdata->vif.bss_conf.ssid_len = 0; |
|
|
|
/* remove AP and TDLS peers */ |
|
sta_info_flush(sdata); |
|
|
|
/* finally reset all BSS / config parameters */ |
|
changed |= ieee80211_reset_erp_info(sdata); |
|
|
|
ieee80211_led_assoc(local, 0); |
|
changed |= BSS_CHANGED_ASSOC; |
|
sdata->vif.bss_conf.assoc = false; |
|
|
|
ifmgd->p2p_noa_index = -1; |
|
memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, |
|
sizeof(sdata->vif.bss_conf.p2p_noa_attr)); |
|
|
|
/* on the next assoc, re-program HT/VHT parameters */ |
|
memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); |
|
memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); |
|
memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); |
|
memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); |
|
|
|
/* reset MU-MIMO ownership and group data */ |
|
memset(sdata->vif.bss_conf.mu_group.membership, 0, |
|
sizeof(sdata->vif.bss_conf.mu_group.membership)); |
|
memset(sdata->vif.bss_conf.mu_group.position, 0, |
|
sizeof(sdata->vif.bss_conf.mu_group.position)); |
|
changed |= BSS_CHANGED_MU_GROUPS; |
|
sdata->vif.mu_mimo_owner = false; |
|
|
|
sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
|
|
|
del_timer_sync(&local->dynamic_ps_timer); |
|
cancel_work_sync(&local->dynamic_ps_enable_work); |
|
|
|
/* Disable ARP filtering */ |
|
if (sdata->vif.bss_conf.arp_addr_cnt) |
|
changed |= BSS_CHANGED_ARP_FILTER; |
|
|
|
sdata->vif.bss_conf.qos = false; |
|
changed |= BSS_CHANGED_QOS; |
|
|
|
/* The BSSID (not really interesting) and HT changed */ |
|
changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; |
|
ieee80211_bss_info_change_notify(sdata, changed); |
|
|
|
/* disassociated - set to defaults now */ |
|
ieee80211_set_wmm_default(sdata, false, false); |
|
|
|
del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
|
del_timer_sync(&sdata->u.mgd.bcn_mon_timer); |
|
del_timer_sync(&sdata->u.mgd.timer); |
|
del_timer_sync(&sdata->u.mgd.chswitch_timer); |
|
|
|
sdata->vif.bss_conf.dtim_period = 0; |
|
sdata->vif.bss_conf.beacon_rate = NULL; |
|
|
|
ifmgd->have_beacon = false; |
|
|
|
ifmgd->flags = 0; |
|
mutex_lock(&local->mtx); |
|
ieee80211_vif_release_channel(sdata); |
|
|
|
sdata->vif.csa_active = false; |
|
ifmgd->csa_waiting_bcn = false; |
|
ifmgd->csa_ignored_same_chan = false; |
|
if (sdata->csa_block_tx) { |
|
ieee80211_wake_vif_queues(local, sdata, |
|
IEEE80211_QUEUE_STOP_REASON_CSA); |
|
sdata->csa_block_tx = false; |
|
} |
|
mutex_unlock(&local->mtx); |
|
|
|
/* existing TX TSPEC sessions no longer exist */ |
|
memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); |
|
cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); |
|
|
|
sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; |
|
|
|
bss_conf->pwr_reduction = 0; |
|
bss_conf->tx_pwr_env_num = 0; |
|
memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env)); |
|
} |
|
|
|
static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct ieee80211_local *local = sdata->local; |
|
|
|
mutex_lock(&local->mtx); |
|
if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) |
|
goto out; |
|
|
|
__ieee80211_stop_poll(sdata); |
|
|
|
mutex_lock(&local->iflist_mtx); |
|
ieee80211_recalc_ps(local); |
|
mutex_unlock(&local->iflist_mtx); |
|
|
|
if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) |
|
goto out; |
|
|
|
/* |
|
* We've received a probe response, but are not sure whether |
|
* we have or will be receiving any beacons or data, so let's |
|
* schedule the timers again, just in case. |
|
*/ |
|
ieee80211_sta_reset_beacon_monitor(sdata); |
|
|
|
mod_timer(&ifmgd->conn_mon_timer, |
|
round_jiffies_up(jiffies + |
|
IEEE80211_CONNECTION_IDLE_TIME)); |
|
out: |
|
mutex_unlock(&local->mtx); |
|
} |
|
|
|
static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_hdr *hdr, |
|
u16 tx_time) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
u16 tid; |
|
int ac; |
|
struct ieee80211_sta_tx_tspec *tx_tspec; |
|
unsigned long now = jiffies; |
|
|
|
if (!ieee80211_is_data_qos(hdr->frame_control)) |
|
return; |
|
|
|
tid = ieee80211_get_tid(hdr); |
|
ac = ieee80211_ac_from_tid(tid); |
|
tx_tspec = &ifmgd->tx_tspec[ac]; |
|
|
|
if (likely(!tx_tspec->admitted_time)) |
|
return; |
|
|
|
if (time_after(now, tx_tspec->time_slice_start + HZ)) { |
|
tx_tspec->consumed_tx_time = 0; |
|
tx_tspec->time_slice_start = now; |
|
|
|
if (tx_tspec->downgraded) { |
|
tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; |
|
schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); |
|
} |
|
} |
|
|
|
if (tx_tspec->downgraded) |
|
return; |
|
|
|
tx_tspec->consumed_tx_time += tx_time; |
|
|
|
if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { |
|
tx_tspec->downgraded = true; |
|
tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; |
|
schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); |
|
} |
|
} |
|
|
|
void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_hdr *hdr, bool ack, u16 tx_time) |
|
{ |
|
ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); |
|
|
|
if (!ieee80211_is_any_nullfunc(hdr->frame_control) || |
|
!sdata->u.mgd.probe_send_count) |
|
return; |
|
|
|
if (ack) |
|
sdata->u.mgd.probe_send_count = 0; |
|
else |
|
sdata->u.mgd.nullfunc_failed = true; |
|
ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
|
} |
|
|
|
static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, |
|
const u8 *src, const u8 *dst, |
|
const u8 *ssid, size_t ssid_len, |
|
struct ieee80211_channel *channel) |
|
{ |
|
struct sk_buff *skb; |
|
|
|
skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, |
|
ssid, ssid_len, NULL, 0, |
|
IEEE80211_PROBE_FLAG_DIRECTED); |
|
if (skb) |
|
ieee80211_tx_skb(sdata, skb); |
|
} |
|
|
|
static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
const struct element *ssid; |
|
u8 *dst = ifmgd->associated->bssid; |
|
u8 unicast_limit = max(1, max_probe_tries - 3); |
|
struct sta_info *sta; |
|
|
|
/* |
|
* Try sending broadcast probe requests for the last three |
|
* probe requests after the first ones failed since some |
|
* buggy APs only support broadcast probe requests. |
|
*/ |
|
if (ifmgd->probe_send_count >= unicast_limit) |
|
dst = NULL; |
|
|
|
/* |
|
* When the hardware reports an accurate Tx ACK status, it's |
|
* better to send a nullfunc frame instead of a probe request, |
|
* as it will kick us off the AP quickly if we aren't associated |
|
* anymore. The timeout will be reset if the frame is ACKed by |
|
* the AP. |
|
*/ |
|
ifmgd->probe_send_count++; |
|
|
|
if (dst) { |
|
mutex_lock(&sdata->local->sta_mtx); |
|
sta = sta_info_get(sdata, dst); |
|
if (!WARN_ON(!sta)) |
|
ieee80211_check_fast_rx(sta); |
|
mutex_unlock(&sdata->local->sta_mtx); |
|
} |
|
|
|
if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { |
|
ifmgd->nullfunc_failed = false; |
|
ieee80211_send_nullfunc(sdata->local, sdata, false); |
|
} else { |
|
int ssid_len; |
|
|
|
rcu_read_lock(); |
|
ssid = ieee80211_bss_get_elem(ifmgd->associated, WLAN_EID_SSID); |
|
if (WARN_ON_ONCE(ssid == NULL)) |
|
ssid_len = 0; |
|
else |
|
ssid_len = ssid->datalen; |
|
|
|
ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, |
|
ssid->data, ssid_len, |
|
ifmgd->associated->channel); |
|
rcu_read_unlock(); |
|
} |
|
|
|
ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); |
|
run_again(sdata, ifmgd->probe_timeout); |
|
} |
|
|
|
static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
|
bool beacon) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
bool already = false; |
|
|
|
if (!ieee80211_sdata_running(sdata)) |
|
return; |
|
|
|
sdata_lock(sdata); |
|
|
|
if (!ifmgd->associated) |
|
goto out; |
|
|
|
mutex_lock(&sdata->local->mtx); |
|
|
|
if (sdata->local->tmp_channel || sdata->local->scanning) { |
|
mutex_unlock(&sdata->local->mtx); |
|
goto out; |
|
} |
|
|
|
if (sdata->local->suspending) { |
|
/* reschedule after resume */ |
|
mutex_unlock(&sdata->local->mtx); |
|
ieee80211_reset_ap_probe(sdata); |
|
goto out; |
|
} |
|
|
|
if (beacon) { |
|
mlme_dbg_ratelimited(sdata, |
|
"detected beacon loss from AP (missed %d beacons) - probing\n", |
|
beacon_loss_count); |
|
|
|
ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); |
|
} |
|
|
|
/* |
|
* The driver/our work has already reported this event or the |
|
* connection monitoring has kicked in and we have already sent |
|
* a probe request. Or maybe the AP died and the driver keeps |
|
* reporting until we disassociate... |
|
* |
|
* In either case we have to ignore the current call to this |
|
* function (except for setting the correct probe reason bit) |
|
* because otherwise we would reset the timer every time and |
|
* never check whether we received a probe response! |
|
*/ |
|
if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) |
|
already = true; |
|
|
|
ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; |
|
|
|
mutex_unlock(&sdata->local->mtx); |
|
|
|
if (already) |
|
goto out; |
|
|
|
mutex_lock(&sdata->local->iflist_mtx); |
|
ieee80211_recalc_ps(sdata->local); |
|
mutex_unlock(&sdata->local->iflist_mtx); |
|
|
|
ifmgd->probe_send_count = 0; |
|
ieee80211_mgd_probe_ap_send(sdata); |
|
out: |
|
sdata_unlock(sdata); |
|
} |
|
|
|
struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, |
|
struct ieee80211_vif *vif) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct cfg80211_bss *cbss; |
|
struct sk_buff *skb; |
|
const struct element *ssid; |
|
int ssid_len; |
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
|
return NULL; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
if (ifmgd->associated) |
|
cbss = ifmgd->associated; |
|
else if (ifmgd->auth_data) |
|
cbss = ifmgd->auth_data->bss; |
|
else if (ifmgd->assoc_data) |
|
cbss = ifmgd->assoc_data->bss; |
|
else |
|
return NULL; |
|
|
|
rcu_read_lock(); |
|
ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); |
|
if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, |
|
"invalid SSID element (len=%d)", |
|
ssid ? ssid->datalen : -1)) |
|
ssid_len = 0; |
|
else |
|
ssid_len = ssid->datalen; |
|
|
|
skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, |
|
(u32) -1, cbss->channel, |
|
ssid->data, ssid_len, |
|
NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); |
|
rcu_read_unlock(); |
|
|
|
return skb; |
|
} |
|
EXPORT_SYMBOL(ieee80211_ap_probereq_get); |
|
|
|
static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, |
|
const u8 *buf, size_t len, bool tx, |
|
u16 reason, bool reconnect) |
|
{ |
|
struct ieee80211_event event = { |
|
.type = MLME_EVENT, |
|
.u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, |
|
.u.mlme.reason = reason, |
|
}; |
|
|
|
if (tx) |
|
cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); |
|
else |
|
cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); |
|
|
|
drv_event_callback(sdata->local, sdata, &event); |
|
} |
|
|
|
static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
|
bool tx; |
|
|
|
sdata_lock(sdata); |
|
if (!ifmgd->associated) { |
|
sdata_unlock(sdata); |
|
return; |
|
} |
|
|
|
tx = !sdata->csa_block_tx; |
|
|
|
if (!ifmgd->driver_disconnect) { |
|
/* |
|
* AP is probably out of range (or not reachable for another |
|
* reason) so remove the bss struct for that AP. |
|
*/ |
|
cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); |
|
} |
|
|
|
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
|
ifmgd->driver_disconnect ? |
|
WLAN_REASON_DEAUTH_LEAVING : |
|
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
|
tx, frame_buf); |
|
mutex_lock(&local->mtx); |
|
sdata->vif.csa_active = false; |
|
ifmgd->csa_waiting_bcn = false; |
|
if (sdata->csa_block_tx) { |
|
ieee80211_wake_vif_queues(local, sdata, |
|
IEEE80211_QUEUE_STOP_REASON_CSA); |
|
sdata->csa_block_tx = false; |
|
} |
|
mutex_unlock(&local->mtx); |
|
|
|
ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, |
|
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
|
ifmgd->reconnect); |
|
ifmgd->reconnect = false; |
|
|
|
sdata_unlock(sdata); |
|
} |
|
|
|
static void ieee80211_beacon_connection_loss_work(struct work_struct *work) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = |
|
container_of(work, struct ieee80211_sub_if_data, |
|
u.mgd.beacon_connection_loss_work); |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
|
|
if (ifmgd->associated) |
|
ifmgd->beacon_loss_count++; |
|
|
|
if (ifmgd->connection_loss) { |
|
sdata_info(sdata, "Connection to AP %pM lost\n", |
|
ifmgd->bssid); |
|
__ieee80211_disconnect(sdata); |
|
ifmgd->connection_loss = false; |
|
} else if (ifmgd->driver_disconnect) { |
|
sdata_info(sdata, |
|
"Driver requested disconnection from AP %pM\n", |
|
ifmgd->bssid); |
|
__ieee80211_disconnect(sdata); |
|
ifmgd->driver_disconnect = false; |
|
} else { |
|
ieee80211_mgd_probe_ap(sdata, true); |
|
} |
|
} |
|
|
|
static void ieee80211_csa_connection_drop_work(struct work_struct *work) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = |
|
container_of(work, struct ieee80211_sub_if_data, |
|
u.mgd.csa_connection_drop_work); |
|
|
|
__ieee80211_disconnect(sdata); |
|
} |
|
|
|
void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
|
struct ieee80211_hw *hw = &sdata->local->hw; |
|
|
|
trace_api_beacon_loss(sdata); |
|
|
|
sdata->u.mgd.connection_loss = false; |
|
ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); |
|
} |
|
EXPORT_SYMBOL(ieee80211_beacon_loss); |
|
|
|
void ieee80211_connection_loss(struct ieee80211_vif *vif) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
|
struct ieee80211_hw *hw = &sdata->local->hw; |
|
|
|
trace_api_connection_loss(sdata); |
|
|
|
sdata->u.mgd.connection_loss = true; |
|
ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); |
|
} |
|
EXPORT_SYMBOL(ieee80211_connection_loss); |
|
|
|
void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
|
struct ieee80211_hw *hw = &sdata->local->hw; |
|
|
|
trace_api_disconnect(sdata, reconnect); |
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
|
return; |
|
|
|
sdata->u.mgd.driver_disconnect = true; |
|
sdata->u.mgd.reconnect = reconnect; |
|
ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); |
|
} |
|
EXPORT_SYMBOL(ieee80211_disconnect); |
|
|
|
static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, |
|
bool assoc) |
|
{ |
|
struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
if (!assoc) { |
|
/* |
|
* we are not authenticated yet, the only timer that could be |
|
* running is the timeout for the authentication response which |
|
* which is not relevant anymore. |
|
*/ |
|
del_timer_sync(&sdata->u.mgd.timer); |
|
sta_info_destroy_addr(sdata, auth_data->bss->bssid); |
|
|
|
eth_zero_addr(sdata->u.mgd.bssid); |
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); |
|
sdata->u.mgd.flags = 0; |
|
mutex_lock(&sdata->local->mtx); |
|
ieee80211_vif_release_channel(sdata); |
|
mutex_unlock(&sdata->local->mtx); |
|
} |
|
|
|
cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); |
|
kfree(auth_data); |
|
sdata->u.mgd.auth_data = NULL; |
|
} |
|
|
|
static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, |
|
bool assoc, bool abandon) |
|
{ |
|
struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
if (!assoc) { |
|
/* |
|
* we are not associated yet, the only timer that could be |
|
* running is the timeout for the association response which |
|
* which is not relevant anymore. |
|
*/ |
|
del_timer_sync(&sdata->u.mgd.timer); |
|
sta_info_destroy_addr(sdata, assoc_data->bss->bssid); |
|
|
|
eth_zero_addr(sdata->u.mgd.bssid); |
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); |
|
sdata->u.mgd.flags = 0; |
|
sdata->vif.mu_mimo_owner = false; |
|
|
|
mutex_lock(&sdata->local->mtx); |
|
ieee80211_vif_release_channel(sdata); |
|
mutex_unlock(&sdata->local->mtx); |
|
|
|
if (abandon) |
|
cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); |
|
} |
|
|
|
kfree(assoc_data); |
|
sdata->u.mgd.assoc_data = NULL; |
|
} |
|
|
|
static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_mgmt *mgmt, size_t len) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; |
|
const struct element *challenge; |
|
u8 *pos; |
|
u32 tx_flags = 0; |
|
struct ieee80211_prep_tx_info info = { |
|
.subtype = IEEE80211_STYPE_AUTH, |
|
}; |
|
|
|
pos = mgmt->u.auth.variable; |
|
challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, |
|
len - (pos - (u8 *)mgmt)); |
|
if (!challenge) |
|
return; |
|
auth_data->expected_transaction = 4; |
|
drv_mgd_prepare_tx(sdata->local, sdata, &info); |
|
if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
|
tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
|
IEEE80211_TX_INTFL_MLME_CONN_TX; |
|
ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, |
|
(void *)challenge, |
|
challenge->datalen + sizeof(*challenge), |
|
auth_data->bss->bssid, auth_data->bss->bssid, |
|
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, |
|
const u8 *bssid) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct sta_info *sta; |
|
bool result = true; |
|
|
|
sdata_info(sdata, "authenticated\n"); |
|
ifmgd->auth_data->done = true; |
|
ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; |
|
ifmgd->auth_data->timeout_started = true; |
|
run_again(sdata, ifmgd->auth_data->timeout); |
|
|
|
/* move station state to auth */ |
|
mutex_lock(&sdata->local->sta_mtx); |
|
sta = sta_info_get(sdata, bssid); |
|
if (!sta) { |
|
WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); |
|
result = false; |
|
goto out; |
|
} |
|
if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { |
|
sdata_info(sdata, "failed moving %pM to auth\n", bssid); |
|
result = false; |
|
goto out; |
|
} |
|
|
|
out: |
|
mutex_unlock(&sdata->local->sta_mtx); |
|
return result; |
|
} |
|
|
|
static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_mgmt *mgmt, size_t len) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
u8 bssid[ETH_ALEN]; |
|
u16 auth_alg, auth_transaction, status_code; |
|
struct ieee80211_event event = { |
|
.type = MLME_EVENT, |
|
.u.mlme.data = AUTH_EVENT, |
|
}; |
|
struct ieee80211_prep_tx_info info = { |
|
.subtype = IEEE80211_STYPE_AUTH, |
|
}; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
if (len < 24 + 6) |
|
return; |
|
|
|
if (!ifmgd->auth_data || ifmgd->auth_data->done) |
|
return; |
|
|
|
memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); |
|
|
|
if (!ether_addr_equal(bssid, mgmt->bssid)) |
|
return; |
|
|
|
auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); |
|
auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); |
|
status_code = le16_to_cpu(mgmt->u.auth.status_code); |
|
|
|
if (auth_alg != ifmgd->auth_data->algorithm || |
|
(auth_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)))) |
|
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, bssid)) |
|
return; /* ignore frame -- wait for timeout */ |
|
} else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && |
|
auth_transaction == 2) { |
|
sdata_info(sdata, "SAE peer confirmed\n"); |
|
ifmgd->auth_data->peer_confirmed = true; |
|
} |
|
|
|
cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); |
|
notify_driver: |
|
drv_mgd_complete_tx(sdata->local, sdata, &info); |
|
} |
|
|
|
#define case_WLAN(type) \ |
|
case WLAN_REASON_##type: return #type |
|
|
|
const char *ieee80211_get_reason_code_string(u16 reason_code) |
|
{ |
|
switch (reason_code) { |
|
case_WLAN(UNSPECIFIED); |
|
case_WLAN(PREV_AUTH_NOT_VALID); |
|
case_WLAN(DEAUTH_LEAVING); |
|
case_WLAN(DISASSOC_DUE_TO_INACTIVITY); |
|
case_WLAN(DISASSOC_AP_BUSY); |
|
case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); |
|
case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); |
|
case_WLAN(DISASSOC_STA_HAS_LEFT); |
|
case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); |
|
case_WLAN(DISASSOC_BAD_POWER); |
|
case_WLAN(DISASSOC_BAD_SUPP_CHAN); |
|
case_WLAN(INVALID_IE); |
|
case_WLAN(MIC_FAILURE); |
|
case_WLAN(4WAY_HANDSHAKE_TIMEOUT); |
|
case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); |
|
case_WLAN(IE_DIFFERENT); |
|
case_WLAN(INVALID_GROUP_CIPHER); |
|
case_WLAN(INVALID_PAIRWISE_CIPHER); |
|
case_WLAN(INVALID_AKMP); |
|
case_WLAN(UNSUPP_RSN_VERSION); |
|
case_WLAN(INVALID_RSN_IE_CAP); |
|
case_WLAN(IEEE8021X_FAILED); |
|
case_WLAN(CIPHER_SUITE_REJECTED); |
|
case_WLAN(DISASSOC_UNSPECIFIED_QOS); |
|
case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); |
|
case_WLAN(DISASSOC_LOW_ACK); |
|
case_WLAN(DISASSOC_QAP_EXCEED_TXOP); |
|
case_WLAN(QSTA_LEAVE_QBSS); |
|
case_WLAN(QSTA_NOT_USE); |
|
case_WLAN(QSTA_REQUIRE_SETUP); |
|
case_WLAN(QSTA_TIMEOUT); |
|
case_WLAN(QSTA_CIPHER_NOT_SUPP); |
|
case_WLAN(MESH_PEER_CANCELED); |
|
case_WLAN(MESH_MAX_PEERS); |
|
case_WLAN(MESH_CONFIG); |
|
case_WLAN(MESH_CLOSE); |
|
case_WLAN(MESH_MAX_RETRIES); |
|
case_WLAN(MESH_CONFIRM_TIMEOUT); |
|
case_WLAN(MESH_INVALID_GTK); |
|
case_WLAN(MESH_INCONSISTENT_PARAM); |
|
case_WLAN(MESH_INVALID_SECURITY); |
|
case_WLAN(MESH_PATH_ERROR); |
|
case_WLAN(MESH_PATH_NOFORWARD); |
|
case_WLAN(MESH_PATH_DEST_UNREACHABLE); |
|
case_WLAN(MAC_EXISTS_IN_MBSS); |
|
case_WLAN(MESH_CHAN_REGULATORY); |
|
case_WLAN(MESH_CHAN); |
|
default: return "<unknown>"; |
|
} |
|
} |
|
|
|
static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_mgmt *mgmt, size_t len) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
if (len < 24 + 2) |
|
return; |
|
|
|
if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { |
|
ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); |
|
return; |
|
} |
|
|
|
if (ifmgd->associated && |
|
ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { |
|
const u8 *bssid = ifmgd->associated->bssid; |
|
|
|
sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", |
|
bssid, reason_code, |
|
ieee80211_get_reason_code_string(reason_code)); |
|
|
|
ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
|
|
|
ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, |
|
reason_code, false); |
|
return; |
|
} |
|
|
|
if (ifmgd->assoc_data && |
|
ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { |
|
const u8 *bssid = ifmgd->assoc_data->bss->bssid; |
|
|
|
sdata_info(sdata, |
|
"deauthenticated from %pM while associating (Reason: %u=%s)\n", |
|
bssid, reason_code, |
|
ieee80211_get_reason_code_string(reason_code)); |
|
|
|
ieee80211_destroy_assoc_data(sdata, false, true); |
|
|
|
cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); |
|
return; |
|
} |
|
} |
|
|
|
|
|
static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_mgmt *mgmt, size_t len) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
u16 reason_code; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
if (len < 24 + 2) |
|
return; |
|
|
|
if (!ifmgd->associated || |
|
!ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
|
return; |
|
|
|
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); |
|
|
|
if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { |
|
ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); |
|
return; |
|
} |
|
|
|
sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", |
|
mgmt->sa, reason_code, |
|
ieee80211_get_reason_code_string(reason_code)); |
|
|
|
ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
|
|
|
ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, |
|
false); |
|
} |
|
|
|
static void ieee80211_get_rates(struct ieee80211_supported_band *sband, |
|
u8 *supp_rates, unsigned int supp_rates_len, |
|
u32 *rates, u32 *basic_rates, |
|
bool *have_higher_than_11mbit, |
|
int *min_rate, int *min_rate_index, |
|
int shift) |
|
{ |
|
int i, j; |
|
|
|
for (i = 0; i < supp_rates_len; i++) { |
|
int rate = supp_rates[i] & 0x7f; |
|
bool is_basic = !!(supp_rates[i] & 0x80); |
|
|
|
if ((rate * 5 * (1 << shift)) > 110) |
|
*have_higher_than_11mbit = true; |
|
|
|
/* |
|
* Skip HT, VHT, HE and SAE H2E only BSS membership selectors |
|
* since they're not rates. |
|
* |
|
* Note: Even though the membership selector and the basic |
|
* rate flag share the same bit, they are not exactly |
|
* the same. |
|
*/ |
|
if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || |
|
supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || |
|
supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || |
|
supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) |
|
continue; |
|
|
|
for (j = 0; j < sband->n_bitrates; j++) { |
|
struct ieee80211_rate *br; |
|
int brate; |
|
|
|
br = &sband->bitrates[j]; |
|
|
|
brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); |
|
if (brate == rate) { |
|
*rates |= BIT(j); |
|
if (is_basic) |
|
*basic_rates |= BIT(j); |
|
if ((rate * 5) < *min_rate) { |
|
*min_rate = rate * 5; |
|
*min_rate_index = j; |
|
} |
|
break; |
|
} |
|
} |
|
} |
|
} |
|
|
|
static bool ieee80211_twt_req_supported(const struct sta_info *sta, |
|
const struct ieee802_11_elems *elems) |
|
{ |
|
if (elems->ext_capab_len < 10) |
|
return false; |
|
|
|
if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) |
|
return false; |
|
|
|
return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & |
|
IEEE80211_HE_MAC_CAP0_TWT_RES; |
|
} |
|
|
|
static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, |
|
struct sta_info *sta, |
|
struct ieee802_11_elems *elems) |
|
{ |
|
bool twt = ieee80211_twt_req_supported(sta, elems); |
|
|
|
if (sdata->vif.bss_conf.twt_requester != twt) { |
|
sdata->vif.bss_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 sta_info *sta) |
|
{ |
|
const struct ieee80211_sta_he_cap *own_he_cap = |
|
ieee80211_get_he_iftype_cap(sband, |
|
ieee80211_vif_type_p2p(&sdata->vif)); |
|
|
|
return bss_conf->he_support && |
|
(sta->sta.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_success(struct ieee80211_sub_if_data *sdata, |
|
struct cfg80211_bss *cbss, |
|
struct ieee80211_mgmt *mgmt, size_t len, |
|
struct ieee802_11_elems *elems) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_supported_band *sband; |
|
struct sta_info *sta; |
|
u16 capab_info, aid; |
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
|
const struct cfg80211_bss_ies *bss_ies = NULL; |
|
struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; |
|
bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; |
|
bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; |
|
u32 changed = 0; |
|
u8 *pos; |
|
int err; |
|
bool ret; |
|
|
|
/* AssocResp and ReassocResp have identical structure */ |
|
|
|
pos = mgmt->u.assoc_resp.variable; |
|
aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
|
if (is_s1g) { |
|
pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; |
|
aid = 0; /* TODO */ |
|
} |
|
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
|
elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, |
|
mgmt->bssid, assoc_data->bss->bssid); |
|
|
|
if (!elems) |
|
return false; |
|
|
|
if (elems->aid_resp) |
|
aid = le16_to_cpu(elems->aid_resp->aid); |
|
|
|
/* |
|
* The 5 MSB of the AID field are reserved |
|
* (802.11-2016 9.4.1.8 AID field) |
|
*/ |
|
aid &= 0x7ff; |
|
|
|
ifmgd->broken_ap = false; |
|
|
|
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 (!is_s1g && !elems->supp_rates) { |
|
sdata_info(sdata, "no SuppRates element in AssocResp\n"); |
|
ret = false; |
|
goto out; |
|
} |
|
|
|
sdata->vif.bss_conf.aid = aid; |
|
ifmgd->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) || |
|
(!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
|
(!elems->ht_cap_elem || !elems->ht_operation)) || |
|
(!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && |
|
(!elems->vht_cap_elem || !elems->vht_operation)))) { |
|
const struct cfg80211_bss_ies *ies; |
|
struct ieee802_11_elems *bss_elems; |
|
|
|
rcu_read_lock(); |
|
ies = rcu_dereference(cbss->ies); |
|
if (ies) |
|
bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, |
|
GFP_ATOMIC); |
|
rcu_read_unlock(); |
|
if (!bss_ies) { |
|
ret = false; |
|
goto out; |
|
} |
|
|
|
bss_elems = ieee802_11_parse_elems(bss_ies->data, bss_ies->len, |
|
false, mgmt->bssid, |
|
assoc_data->bss->bssid); |
|
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 && |
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { |
|
elems->ht_cap_elem = bss_elems->ht_cap_elem; |
|
sdata_info(sdata, |
|
"AP bug: HT capability missing from AssocResp\n"); |
|
} |
|
if (!elems->ht_operation && bss_elems->ht_operation && |
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { |
|
elems->ht_operation = bss_elems->ht_operation; |
|
sdata_info(sdata, |
|
"AP bug: HT operation missing from AssocResp\n"); |
|
} |
|
if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && |
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { |
|
elems->vht_cap_elem = bss_elems->vht_cap_elem; |
|
sdata_info(sdata, |
|
"AP bug: VHT capa missing from AssocResp\n"); |
|
} |
|
if (!elems->vht_operation && bss_elems->vht_operation && |
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { |
|
elems->vht_operation = bss_elems->vht_operation; |
|
sdata_info(sdata, |
|
"AP bug: VHT operation missing from AssocResp\n"); |
|
} |
|
|
|
kfree(bss_elems); |
|
} |
|
|
|
/* |
|
* We previously checked these in the beacon/probe response, so |
|
* they should be present here. This is just a safety net. |
|
*/ |
|
if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
|
(!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { |
|
sdata_info(sdata, |
|
"HT AP is missing WMM params or HT capability/operation\n"); |
|
ret = false; |
|
goto out; |
|
} |
|
|
|
if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && |
|
(!elems->vht_cap_elem || !elems->vht_operation)) { |
|
sdata_info(sdata, |
|
"VHT AP is missing VHT capability/operation\n"); |
|
ret = false; |
|
goto out; |
|
} |
|
|
|
if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && |
|
!elems->he_6ghz_capa) { |
|
sdata_info(sdata, |
|
"HE 6 GHz AP is missing HE 6 GHz band capability\n"); |
|
ret = false; |
|
goto out; |
|
} |
|
|
|
mutex_lock(&sdata->local->sta_mtx); |
|
/* |
|
* station info was already allocated and inserted before |
|
* the association and should be available to us |
|
*/ |
|
sta = sta_info_get(sdata, cbss->bssid); |
|
if (WARN_ON(!sta)) { |
|
mutex_unlock(&sdata->local->sta_mtx); |
|
ret = false; |
|
goto out; |
|
} |
|
|
|
sband = ieee80211_get_sband(sdata); |
|
if (!sband) { |
|
mutex_unlock(&sdata->local->sta_mtx); |
|
ret = false; |
|
goto out; |
|
} |
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && |
|
(!elems->he_cap || !elems->he_operation)) { |
|
mutex_unlock(&sdata->local->sta_mtx); |
|
sdata_info(sdata, |
|
"HE AP is missing HE capability/operation\n"); |
|
ret = false; |
|
goto out; |
|
} |
|
|
|
/* Set up internal HT/VHT capabilities */ |
|
if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
|
ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
|
elems->ht_cap_elem, sta); |
|
|
|
if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
|
ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, |
|
elems->vht_cap_elem, sta); |
|
|
|
if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && |
|
elems->he_cap) { |
|
ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, |
|
elems->he_cap, |
|
elems->he_cap_len, |
|
elems->he_6ghz_capa, |
|
sta); |
|
|
|
bss_conf->he_support = sta->sta.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, sta, elems); |
|
} else { |
|
bss_conf->he_support = false; |
|
bss_conf->twt_requester = false; |
|
bss_conf->twt_protected = false; |
|
} |
|
|
|
bss_conf->twt_broadcast = |
|
ieee80211_twt_bcast_support(sdata, bss_conf, sband, 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; |
|
sta->sta.rx_nss = nss; |
|
} |
|
|
|
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; |
|
} |
|
|
|
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)); |
|
mutex_unlock(&sdata->local->sta_mtx); |
|
ret = false; |
|
goto out; |
|
} |
|
|
|
if (sdata->wdev.use_4addr) |
|
drv_sta_set_4addr(local, sdata, &sta->sta, true); |
|
|
|
mutex_unlock(&sdata->local->sta_mtx); |
|
|
|
/* |
|
* 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. |
|
*/ |
|
ifmgd->wmm_last_param_set = -1; |
|
ifmgd->mu_edca_last_param_set = -1; |
|
|
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { |
|
ieee80211_set_wmm_default(sdata, false, false); |
|
} else if (!ieee80211_sta_wmm_params(local, sdata, 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(sdata, false, true); |
|
/* set the disable-WMM flag 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. |
|
*/ |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; |
|
} |
|
changed |= BSS_CHANGED_QOS; |
|
|
|
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; |
|
ieee80211_set_associated(sdata, cbss, 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); |
|
|
|
ret = true; |
|
out: |
|
kfree(elems); |
|
kfree(bss_ies); |
|
return ret; |
|
} |
|
|
|
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 ieee802_11_elems *elems; |
|
int ac, uapsd_queues = -1; |
|
u8 *pos; |
|
bool reassoc; |
|
struct cfg80211_bss *cbss; |
|
struct ieee80211_event event = { |
|
.type = MLME_EVENT, |
|
.u.mlme.data = ASSOC_EVENT, |
|
}; |
|
struct ieee80211_prep_tx_info info = {}; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
if (!assoc_data) |
|
return; |
|
|
|
if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) |
|
return; |
|
|
|
cbss = assoc_data->bss; |
|
|
|
/* |
|
* 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); |
|
pos = mgmt->u.assoc_resp.variable; |
|
aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
|
if (cbss->channel->band == NL80211_BAND_S1GHZ) { |
|
pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; |
|
aid = 0; /* TODO */ |
|
} |
|
|
|
/* |
|
* 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; |
|
|
|
sdata_info(sdata, |
|
"RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", |
|
reassoc ? "Rea" : "A", mgmt->sa, |
|
capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
|
|
|
if (assoc_data->fils_kek_len && |
|
fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) |
|
return; |
|
|
|
elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, |
|
mgmt->bssid, assoc_data->bss->bssid); |
|
if (!elems) |
|
goto notify_driver; |
|
|
|
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->bss, |
|
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", |
|
mgmt->sa, tu, ms); |
|
assoc_data->timeout = jiffies + msecs_to_jiffies(ms); |
|
assoc_data->timeout_started = true; |
|
if (ms > IEEE80211_ASSOC_TIMEOUT) |
|
run_again(sdata, assoc_data->timeout); |
|
goto notify_driver; |
|
} |
|
|
|
if (status_code != WLAN_STATUS_SUCCESS) { |
|
sdata_info(sdata, "%pM denied association (code=%d)\n", |
|
mgmt->sa, status_code); |
|
ieee80211_destroy_assoc_data(sdata, false, false); |
|
event.u.mlme.status = MLME_DENIED; |
|
event.u.mlme.reason = status_code; |
|
drv_event_callback(sdata->local, sdata, &event); |
|
} else { |
|
if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, elems)) { |
|
/* oops -- internal error -- send timeout for now */ |
|
ieee80211_destroy_assoc_data(sdata, false, false); |
|
cfg80211_assoc_timeout(sdata->dev, cbss); |
|
goto notify_driver; |
|
} |
|
event.u.mlme.status = MLME_SUCCESS; |
|
drv_event_callback(sdata->local, sdata, &event); |
|
sdata_info(sdata, "associated\n"); |
|
|
|
/* |
|
* destroy assoc_data afterwards, as otherwise an idle |
|
* recalc after assoc_data is NULL but before associated |
|
* is set can cause the interface to go idle |
|
*/ |
|
ieee80211_destroy_assoc_data(sdata, true, false); |
|
|
|
/* get uapsd queues configuration */ |
|
uapsd_queues = 0; |
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) |
|
if (sdata->tx_conf[ac].uapsd) |
|
uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; |
|
|
|
info.success = 1; |
|
} |
|
|
|
cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues, |
|
ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); |
|
notify_driver: |
|
drv_mgd_complete_tx(sdata->local, sdata, &info); |
|
kfree(elems); |
|
} |
|
|
|
static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_mgmt *mgmt, size_t len, |
|
struct ieee80211_rx_status *rx_status) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_bss *bss; |
|
struct ieee80211_channel *channel; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
channel = ieee80211_get_channel_khz(local->hw.wiphy, |
|
ieee80211_rx_status_to_khz(rx_status)); |
|
if (!channel) |
|
return; |
|
|
|
bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); |
|
if (bss) { |
|
sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; |
|
ieee80211_rx_bss_put(local, bss); |
|
} |
|
} |
|
|
|
|
|
static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
|
struct sk_buff *skb) |
|
{ |
|
struct ieee80211_mgmt *mgmt = (void *)skb->data; |
|
struct ieee80211_if_managed *ifmgd; |
|
struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
|
struct ieee80211_channel *channel; |
|
size_t baselen, len = skb->len; |
|
|
|
ifmgd = &sdata->u.mgd; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
/* |
|
* According to Draft P802.11ax D6.0 clause 26.17.2.3.2: |
|
* "If a 6 GHz AP receives a Probe Request frame and responds with |
|
* a Probe Response frame [..], the Address 1 field of the Probe |
|
* Response frame shall be set to the broadcast address [..]" |
|
* So, on 6GHz band we should also accept broadcast responses. |
|
*/ |
|
channel = ieee80211_get_channel(sdata->local->hw.wiphy, |
|
rx_status->freq); |
|
if (!channel) |
|
return; |
|
|
|
if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && |
|
(channel->band != NL80211_BAND_6GHZ || |
|
!is_broadcast_ether_addr(mgmt->da))) |
|
return; /* ignore ProbeResp to foreign address */ |
|
|
|
baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
|
if (baselen > len) |
|
return; |
|
|
|
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); |
|
|
|
if (ifmgd->associated && |
|
ether_addr_equal(mgmt->bssid, ifmgd->associated->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_sub_if_data *sdata, |
|
struct ieee80211_if_managed *ifmgd, |
|
struct ieee80211_bss_conf *bss_conf, |
|
struct ieee80211_local *local, |
|
struct ieee80211_rx_status *rx_status) |
|
{ |
|
/* Track average RSSI from the Beacon frames of the current AP */ |
|
|
|
if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { |
|
ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; |
|
ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); |
|
ifmgd->last_cqm_event_signal = 0; |
|
ifmgd->count_beacon_signal = 1; |
|
ifmgd->last_ave_beacon_signal = 0; |
|
} else { |
|
ifmgd->count_beacon_signal++; |
|
} |
|
|
|
ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); |
|
|
|
if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && |
|
ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { |
|
int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); |
|
int last_sig = ifmgd->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)) { |
|
ifmgd->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)) { |
|
ifmgd->last_ave_beacon_signal = sig; |
|
event.u.rssi.data = RSSI_EVENT_LOW; |
|
drv_event_callback(local, sdata, &event); |
|
} |
|
} |
|
|
|
if (bss_conf->cqm_rssi_thold && |
|
ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && |
|
!(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { |
|
int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); |
|
int last_event = ifmgd->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)) { |
|
ifmgd->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)) { |
|
ifmgd->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 && |
|
ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { |
|
int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); |
|
int last_event = ifmgd->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)) { |
|
ifmgd->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)) { |
|
ifmgd->last_cqm_event_signal = sig; |
|
ieee80211_cqm_rssi_notify( |
|
&sdata->vif, |
|
NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, |
|
sig, GFP_KERNEL); |
|
} |
|
} |
|
} |
|
|
|
static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, |
|
struct cfg80211_bss *bss) |
|
{ |
|
if (ether_addr_equal(tx_bssid, bss->bssid)) |
|
return true; |
|
if (!bss->transmitted_bss) |
|
return false; |
|
return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); |
|
} |
|
|
|
static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_hdr *hdr, size_t len, |
|
struct ieee80211_rx_status *rx_status) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
|
struct ieee80211_mgmt *mgmt = (void *) hdr; |
|
size_t baselen; |
|
struct ieee802_11_elems *elems; |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_chanctx_conf *chanctx_conf; |
|
struct ieee80211_channel *chan; |
|
struct sta_info *sta; |
|
u32 changed = 0; |
|
bool erp_valid; |
|
u8 erp_value = 0; |
|
u32 ncrc = 0; |
|
u8 *bssid, *variable = mgmt->u.beacon.variable; |
|
u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
/* Process beacon from the current BSS */ |
|
bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); |
|
if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { |
|
struct ieee80211_ext *ext = (void *) mgmt; |
|
|
|
if (ieee80211_is_s1g_short_beacon(ext->frame_control)) |
|
variable = ext->u.s1g_short_beacon.variable; |
|
else |
|
variable = ext->u.s1g_beacon.variable; |
|
} |
|
|
|
baselen = (u8 *) variable - (u8 *) mgmt; |
|
if (baselen > len) |
|
return; |
|
|
|
rcu_read_lock(); |
|
chanctx_conf = rcu_dereference(sdata->vif.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 && |
|
ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { |
|
elems = ieee802_11_parse_elems(variable, len - baselen, false, |
|
bssid, |
|
ifmgd->assoc_data->bss->bssid); |
|
if (!elems) |
|
return; |
|
|
|
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); |
|
|
|
if (elems->dtim_period) |
|
ifmgd->dtim_period = elems->dtim_period; |
|
ifmgd->have_beacon = true; |
|
ifmgd->assoc_data->need_beacon = false; |
|
if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { |
|
sdata->vif.bss_conf.sync_tsf = |
|
le64_to_cpu(mgmt->u.beacon.timestamp); |
|
sdata->vif.bss_conf.sync_device_ts = |
|
rx_status->device_timestamp; |
|
sdata->vif.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, ifmgd->associated)) |
|
return; |
|
bssid = ifmgd->associated->bssid; |
|
|
|
if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) |
|
ieee80211_handle_beacon_sig(sdata, 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); |
|
elems = ieee802_11_parse_elems_crc(variable, len - baselen, |
|
false, care_about_ies, ncrc, |
|
mgmt->bssid, bssid); |
|
if (!elems) |
|
return; |
|
ncrc = elems->crc; |
|
|
|
if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && |
|
ieee80211_check_tim(elems->tim, elems->tim_len, bss_conf->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 (sdata->u.mgd.p2p_noa_index != noa.index) { |
|
/* valid noa_attr and index changed */ |
|
sdata->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. |
|
*/ |
|
ifmgd->beacon_crc_valid = false; |
|
} |
|
} else if (sdata->u.mgd.p2p_noa_index != -1) { |
|
/* noa_attr not found and we had valid noa_attr before */ |
|
sdata->u.mgd.p2p_noa_index = -1; |
|
memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); |
|
changed |= BSS_CHANGED_P2P_PS; |
|
ifmgd->beacon_crc_valid = false; |
|
} |
|
} |
|
|
|
if (ifmgd->csa_waiting_bcn) |
|
ieee80211_chswitch_post_beacon(sdata); |
|
|
|
/* |
|
* 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)) { |
|
sdata->vif.bss_conf.sync_tsf = |
|
le64_to_cpu(mgmt->u.beacon.timestamp); |
|
sdata->vif.bss_conf.sync_device_ts = |
|
rx_status->device_timestamp; |
|
sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; |
|
} |
|
|
|
if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) || |
|
ieee80211_is_s1g_short_beacon(mgmt->frame_control)) |
|
goto free; |
|
ifmgd->beacon_crc = ncrc; |
|
ifmgd->beacon_crc_valid = true; |
|
|
|
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); |
|
|
|
ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, |
|
rx_status->device_timestamp, |
|
elems, true); |
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && |
|
ieee80211_sta_wmm_params(local, sdata, 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 (!ifmgd->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; |
|
ifmgd->have_beacon = true; |
|
|
|
mutex_lock(&local->iflist_mtx); |
|
ieee80211_recalc_ps(local); |
|
mutex_unlock(&local->iflist_mtx); |
|
|
|
ieee80211_recalc_ps_vif(sdata); |
|
} |
|
|
|
if (elems->erp_info) { |
|
erp_valid = true; |
|
erp_value = elems->erp_info[0]; |
|
} else { |
|
erp_valid = false; |
|
} |
|
|
|
if (!ieee80211_is_s1g_beacon(hdr->frame_control)) |
|
changed |= ieee80211_handle_bss_capability(sdata, |
|
le16_to_cpu(mgmt->u.beacon.capab_info), |
|
erp_valid, erp_value); |
|
|
|
mutex_lock(&local->sta_mtx); |
|
sta = sta_info_get(sdata, bssid); |
|
|
|
changed |= ieee80211_recalc_twt_req(sdata, sta, elems); |
|
|
|
if (ieee80211_config_bw(sdata, sta, elems->ht_cap_elem, |
|
elems->vht_cap_elem, elems->ht_operation, |
|
elems->vht_operation, elems->he_operation, |
|
elems->s1g_oper, bssid, &changed)) { |
|
mutex_unlock(&local->sta_mtx); |
|
sdata_info(sdata, |
|
"failed to follow AP %pM bandwidth change, disconnect\n", |
|
bssid); |
|
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
|
WLAN_REASON_DEAUTH_LEAVING, |
|
true, deauth_buf); |
|
ieee80211_report_disconnect(sdata, deauth_buf, |
|
sizeof(deauth_buf), true, |
|
WLAN_REASON_DEAUTH_LEAVING, |
|
false); |
|
goto free; |
|
} |
|
|
|
if (sta && elems->opmode_notif) |
|
ieee80211_vht_handle_opmode(sdata, sta, *elems->opmode_notif, |
|
rx_status->band); |
|
mutex_unlock(&local->sta_mtx); |
|
|
|
changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, |
|
elems->country_elem, |
|
elems->country_elem_len, |
|
elems->pwr_constr_elem, |
|
elems->cisco_dtpc_elem); |
|
|
|
ieee80211_bss_info_change_notify(sdata, changed); |
|
free: |
|
kfree(elems); |
|
} |
|
|
|
void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, |
|
struct sk_buff *skb) |
|
{ |
|
struct ieee80211_rx_status *rx_status; |
|
struct ieee80211_hdr *hdr; |
|
u16 fc; |
|
|
|
rx_status = (struct ieee80211_rx_status *) skb->cb; |
|
hdr = (struct ieee80211_hdr *) skb->data; |
|
fc = le16_to_cpu(hdr->frame_control); |
|
|
|
sdata_lock(sdata); |
|
switch (fc & IEEE80211_FCTL_STYPE) { |
|
case IEEE80211_STYPE_S1G_BEACON: |
|
ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status); |
|
break; |
|
} |
|
sdata_unlock(sdata); |
|
} |
|
|
|
void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
|
struct sk_buff *skb) |
|
{ |
|
struct ieee80211_rx_status *rx_status; |
|
struct ieee80211_mgmt *mgmt; |
|
u16 fc; |
|
int ies_len; |
|
|
|
rx_status = (struct ieee80211_rx_status *) skb->cb; |
|
mgmt = (struct ieee80211_mgmt *) skb->data; |
|
fc = le16_to_cpu(mgmt->frame_control); |
|
|
|
sdata_lock(sdata); |
|
|
|
switch (fc & IEEE80211_FCTL_STYPE) { |
|
case IEEE80211_STYPE_BEACON: |
|
ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt, |
|
skb->len, rx_status); |
|
break; |
|
case IEEE80211_STYPE_PROBE_RESP: |
|
ieee80211_rx_mgmt_probe_resp(sdata, skb); |
|
break; |
|
case IEEE80211_STYPE_AUTH: |
|
ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); |
|
break; |
|
case IEEE80211_STYPE_DEAUTH: |
|
ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); |
|
break; |
|
case IEEE80211_STYPE_DISASSOC: |
|
ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); |
|
break; |
|
case IEEE80211_STYPE_ASSOC_RESP: |
|
case IEEE80211_STYPE_REASSOC_RESP: |
|
ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); |
|
break; |
|
case IEEE80211_STYPE_ACTION: |
|
if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { |
|
struct ieee802_11_elems *elems; |
|
|
|
ies_len = skb->len - |
|
offsetof(struct ieee80211_mgmt, |
|
u.action.u.chan_switch.variable); |
|
|
|
if (ies_len < 0) |
|
break; |
|
|
|
/* CSA IE cannot be overridden, no need for BSSID */ |
|
elems = ieee802_11_parse_elems( |
|
mgmt->u.action.u.chan_switch.variable, |
|
ies_len, true, mgmt->bssid, NULL); |
|
|
|
if (elems && !elems->parse_error) |
|
ieee80211_sta_process_chanswitch(sdata, |
|
rx_status->mactime, |
|
rx_status->device_timestamp, |
|
elems, false); |
|
kfree(elems); |
|
} else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { |
|
struct ieee802_11_elems *elems; |
|
|
|
ies_len = skb->len - |
|
offsetof(struct ieee80211_mgmt, |
|
u.action.u.ext_chan_switch.variable); |
|
|
|
if (ies_len < 0) |
|
break; |
|
|
|
/* |
|
* extended CSA IE can't be overridden, no need for |
|
* BSSID |
|
*/ |
|
elems = ieee802_11_parse_elems( |
|
mgmt->u.action.u.ext_chan_switch.variable, |
|
ies_len, true, mgmt->bssid, NULL); |
|
|
|
if (elems && !elems->parse_error) { |
|
/* for the handling code pretend it was an IE */ |
|
elems->ext_chansw_ie = |
|
&mgmt->u.action.u.ext_chan_switch.data; |
|
|
|
ieee80211_sta_process_chanswitch(sdata, |
|
rx_status->mactime, |
|
rx_status->device_timestamp, |
|
elems, false); |
|
} |
|
|
|
kfree(elems); |
|
} |
|
break; |
|
} |
|
sdata_unlock(sdata); |
|
} |
|
|
|
static void ieee80211_sta_timer(struct timer_list *t) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = |
|
from_timer(sdata, t, u.mgd.timer); |
|
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
|
} |
|
|
|
void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, |
|
u8 *bssid, u8 reason, bool tx) |
|
{ |
|
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
|
|
|
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, |
|
tx, frame_buf); |
|
|
|
ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, |
|
reason, false); |
|
} |
|
|
|
static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; |
|
u32 tx_flags = 0; |
|
u16 trans = 1; |
|
u16 status = 0; |
|
struct ieee80211_prep_tx_info info = { |
|
.subtype = IEEE80211_STYPE_AUTH, |
|
}; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
if (WARN_ON_ONCE(!auth_data)) |
|
return -EINVAL; |
|
|
|
auth_data->tries++; |
|
|
|
if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { |
|
sdata_info(sdata, "authentication with %pM timed out\n", |
|
auth_data->bss->bssid); |
|
|
|
/* |
|
* Most likely AP is not in the range so remove the |
|
* bss struct for that AP. |
|
*/ |
|
cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); |
|
|
|
return -ETIMEDOUT; |
|
} |
|
|
|
if (auth_data->algorithm == WLAN_AUTH_SAE) |
|
info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); |
|
|
|
drv_mgd_prepare_tx(local, sdata, &info); |
|
|
|
sdata_info(sdata, "send auth to %pM (try %d/%d)\n", |
|
auth_data->bss->bssid, 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->bss->bssid, |
|
auth_data->bss->bssid, NULL, 0, 0, |
|
tx_flags); |
|
|
|
if (tx_flags == 0) { |
|
if (auth_data->algorithm == WLAN_AUTH_SAE) |
|
auth_data->timeout = jiffies + |
|
IEEE80211_AUTH_TIMEOUT_SAE; |
|
else |
|
auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; |
|
} else { |
|
auth_data->timeout = |
|
round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); |
|
} |
|
|
|
auth_data->timeout_started = true; |
|
run_again(sdata, auth_data->timeout); |
|
|
|
return 0; |
|
} |
|
|
|
static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; |
|
struct ieee80211_local *local = sdata->local; |
|
int ret; |
|
|
|
sdata_assert_lock(sdata); |
|
|
|
assoc_data->tries++; |
|
if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { |
|
sdata_info(sdata, "association with %pM timed out\n", |
|
assoc_data->bss->bssid); |
|
|
|
/* |
|
* Most likely AP is not in the range so remove the |
|
* bss struct for that AP. |
|
*/ |
|
cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); |
|
|
|
return -ETIMEDOUT; |
|
} |
|
|
|
sdata_info(sdata, "associate with %pM (try %d/%d)\n", |
|
assoc_data->bss->bssid, assoc_data->tries, |
|
IEEE80211_ASSOC_MAX_TRIES); |
|
ret = ieee80211_send_assoc(sdata); |
|
if (ret) |
|
return ret; |
|
|
|
if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
|
assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; |
|
assoc_data->timeout_started = true; |
|
run_again(sdata, assoc_data->timeout); |
|
} else { |
|
assoc_data->timeout = |
|
round_jiffies_up(jiffies + |
|
IEEE80211_ASSOC_TIMEOUT_LONG); |
|
assoc_data->timeout_started = true; |
|
run_again(sdata, assoc_data->timeout); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, |
|
__le16 fc, bool acked) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
|
|
sdata->u.mgd.status_fc = fc; |
|
sdata->u.mgd.status_acked = acked; |
|
sdata->u.mgd.status_received = true; |
|
|
|
ieee80211_queue_work(&local->hw, &sdata->work); |
|
} |
|
|
|
void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
|
|
sdata_lock(sdata); |
|
|
|
if (ifmgd->status_received) { |
|
__le16 fc = ifmgd->status_fc; |
|
bool status_acked = ifmgd->status_acked; |
|
|
|
ifmgd->status_received = false; |
|
if (ifmgd->auth_data && ieee80211_is_auth(fc)) { |
|
if (status_acked) { |
|
if (ifmgd->auth_data->algorithm == |
|
WLAN_AUTH_SAE) |
|
ifmgd->auth_data->timeout = |
|
jiffies + |
|
IEEE80211_AUTH_TIMEOUT_SAE; |
|
else |
|
ifmgd->auth_data->timeout = |
|
jiffies + |
|
IEEE80211_AUTH_TIMEOUT_SHORT; |
|
run_again(sdata, ifmgd->auth_data->timeout); |
|
} else { |
|
ifmgd->auth_data->timeout = jiffies - 1; |
|
} |
|
ifmgd->auth_data->timeout_started = true; |
|
} else if (ifmgd->assoc_data && |
|
(ieee80211_is_assoc_req(fc) || |
|
ieee80211_is_reassoc_req(fc))) { |
|
if (status_acked) { |
|
ifmgd->assoc_data->timeout = |
|
jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; |
|
run_again(sdata, ifmgd->assoc_data->timeout); |
|
} else { |
|
ifmgd->assoc_data->timeout = jiffies - 1; |
|
} |
|
ifmgd->assoc_data->timeout_started = true; |
|
} |
|
} |
|
|
|
if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && |
|
time_after(jiffies, ifmgd->auth_data->timeout)) { |
|
if (ifmgd->auth_data->done) { |
|
/* |
|
* ok ... we waited for assoc but userspace didn't, |
|
* so let's just kill the auth data |
|
*/ |
|
ieee80211_destroy_auth_data(sdata, false); |
|
} else if (ieee80211_auth(sdata)) { |
|
u8 bssid[ETH_ALEN]; |
|
struct ieee80211_event event = { |
|
.type = MLME_EVENT, |
|
.u.mlme.data = AUTH_EVENT, |
|
.u.mlme.status = MLME_TIMEOUT, |
|
}; |
|
|
|
memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); |
|
|
|
ieee80211_destroy_auth_data(sdata, false); |
|
|
|
cfg80211_auth_timeout(sdata->dev, bssid); |
|
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 && !ifmgd->have_beacon) || |
|
ieee80211_do_assoc(sdata)) { |
|
struct cfg80211_bss *bss = ifmgd->assoc_data->bss; |
|
struct ieee80211_event event = { |
|
.type = MLME_EVENT, |
|
.u.mlme.data = ASSOC_EVENT, |
|
.u.mlme.status = MLME_TIMEOUT, |
|
}; |
|
|
|
ieee80211_destroy_assoc_data(sdata, false, false); |
|
cfg80211_assoc_timeout(sdata->dev, bss); |
|
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[ETH_ALEN]; |
|
int max_tries; |
|
|
|
memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
|
|
|
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, bssid, |
|
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, bssid, |
|
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, bssid, |
|
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); |
|
} |
|
} |
|
|
|
sdata_unlock(sdata); |
|
} |
|
|
|
static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = |
|
from_timer(sdata, t, u.mgd.bcn_mon_timer); |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
|
|
if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) |
|
return; |
|
|
|
if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) |
|
return; |
|
|
|
sdata->u.mgd.connection_loss = false; |
|
ieee80211_queue_work(&sdata->local->hw, |
|
&sdata->u.mgd.beacon_connection_loss_work); |
|
} |
|
|
|
static void ieee80211_sta_conn_mon_timer(struct timer_list *t) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = |
|
from_timer(sdata, t, u.mgd.conn_mon_timer); |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct ieee80211_local *local = sdata->local; |
|
struct sta_info *sta; |
|
unsigned long timeout; |
|
|
|
if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) |
|
return; |
|
|
|
sta = sta_info_get(sdata, ifmgd->bssid); |
|
if (!sta) |
|
return; |
|
|
|
timeout = sta->status_stats.last_ack; |
|
if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx)) |
|
timeout = sta->rx_stats.last_rx; |
|
timeout += IEEE80211_CONNECTION_IDLE_TIME; |
|
|
|
/* If timeout is after now, then update timer to fire at |
|
* the later date, but do not actually probe at this time. |
|
*/ |
|
if (time_is_after_jiffies(timeout)) { |
|
mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); |
|
return; |
|
} |
|
|
|
ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
|
} |
|
|
|
static void ieee80211_sta_monitor_work(struct work_struct *work) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = |
|
container_of(work, struct ieee80211_sub_if_data, |
|
u.mgd.monitor_work); |
|
|
|
ieee80211_mgd_probe_ap(sdata, false); |
|
} |
|
|
|
static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
|
__ieee80211_stop_poll(sdata); |
|
|
|
/* let's probe the connection once */ |
|
if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) |
|
ieee80211_queue_work(&sdata->local->hw, |
|
&sdata->u.mgd.monitor_work); |
|
} |
|
} |
|
|
|
#ifdef CONFIG_PM |
|
void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
|
|
|
sdata_lock(sdata); |
|
|
|
if (ifmgd->auth_data || ifmgd->assoc_data) { |
|
const u8 *bssid = ifmgd->auth_data ? |
|
ifmgd->auth_data->bss->bssid : |
|
ifmgd->assoc_data->bss->bssid; |
|
|
|
/* |
|
* 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, bssid, bssid, |
|
IEEE80211_STYPE_DEAUTH, |
|
WLAN_REASON_DEAUTH_LEAVING, |
|
false, frame_buf); |
|
if (ifmgd->assoc_data) |
|
ieee80211_destroy_assoc_data(sdata, false, true); |
|
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, ifmgd->associated->bssid, ETH_ALEN); |
|
ieee80211_mgd_deauth(sdata, &req); |
|
} |
|
|
|
sdata_unlock(sdata); |
|
} |
|
|
|
void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
|
|
sdata_lock(sdata); |
|
if (!ifmgd->associated) { |
|
sdata_unlock(sdata); |
|
return; |
|
} |
|
|
|
if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { |
|
sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; |
|
mlme_dbg(sdata, "driver requested disconnect after resume\n"); |
|
ieee80211_sta_connection_lost(sdata, |
|
ifmgd->associated->bssid, |
|
WLAN_REASON_UNSPECIFIED, |
|
true); |
|
sdata_unlock(sdata); |
|
return; |
|
} |
|
sdata_unlock(sdata); |
|
} |
|
#endif |
|
|
|
/* interface setup */ |
|
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_if_managed *ifmgd; |
|
|
|
ifmgd = &sdata->u.mgd; |
|
INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
|
INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
|
INIT_WORK(&ifmgd->beacon_connection_loss_work, |
|
ieee80211_beacon_connection_loss_work); |
|
INIT_WORK(&ifmgd->csa_connection_drop_work, |
|
ieee80211_csa_connection_drop_work); |
|
INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); |
|
INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, |
|
ieee80211_tdls_peer_del_work); |
|
timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); |
|
timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); |
|
timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); |
|
timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); |
|
INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, |
|
ieee80211_sta_handle_tspec_ac_params_wk); |
|
|
|
ifmgd->flags = 0; |
|
ifmgd->powersave = sdata->wdev.ps; |
|
ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; |
|
ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; |
|
ifmgd->p2p_noa_index = -1; |
|
|
|
if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) |
|
ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; |
|
else |
|
ifmgd->req_smps = IEEE80211_SMPS_OFF; |
|
|
|
/* Setup TDLS data */ |
|
spin_lock_init(&ifmgd->teardown_lock); |
|
ifmgd->teardown_skb = NULL; |
|
ifmgd->orig_teardown_skb = NULL; |
|
} |
|
|
|
/* 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 u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, |
|
struct cfg80211_bss *cbss) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
const struct element *ht_cap_elem, *vht_cap_elem; |
|
const struct ieee80211_ht_cap *ht_cap; |
|
const struct ieee80211_vht_cap *vht_cap; |
|
u8 chains = 1; |
|
|
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) |
|
return chains; |
|
|
|
ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); |
|
if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { |
|
ht_cap = (void *)ht_cap_elem->data; |
|
chains = ieee80211_mcs_to_chains(&ht_cap->mcs); |
|
/* |
|
* TODO: use "Tx Maximum Number Spatial Streams Supported" and |
|
* "Tx Unequal Modulation Supported" fields. |
|
*/ |
|
} |
|
|
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) |
|
return chains; |
|
|
|
vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); |
|
if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { |
|
u8 nss; |
|
u16 tx_mcs_map; |
|
|
|
vht_cap = (void *)vht_cap_elem->data; |
|
tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); |
|
for (nss = 8; nss > 0; nss--) { |
|
if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != |
|
IEEE80211_VHT_MCS_NOT_SUPPORTED) |
|
break; |
|
} |
|
/* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ |
|
chains = max(chains, nss); |
|
} |
|
|
|
return chains; |
|
} |
|
|
|
static bool |
|
ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_supported_band *sband, |
|
const struct ieee80211_he_operation *he_op) |
|
{ |
|
const struct ieee80211_sta_he_cap *sta_he_cap = |
|
ieee80211_get_he_iftype_cap(sband, |
|
ieee80211_vif_type_p2p(&sdata->vif)); |
|
u16 ap_min_req_set; |
|
int i; |
|
|
|
if (!sta_he_cap || !he_op) |
|
return false; |
|
|
|
ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); |
|
|
|
/* 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 |
|
*/ |
|
if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || |
|
sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || |
|
(ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { |
|
verified = false; |
|
break; |
|
} |
|
} |
|
|
|
if (verified) |
|
return true; |
|
} |
|
|
|
/* If here, STA doesn't meet AP's HE min requirements */ |
|
return false; |
|
} |
|
|
|
static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, |
|
struct cfg80211_bss *cbss) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
const struct ieee80211_ht_cap *ht_cap = NULL; |
|
const struct ieee80211_ht_operation *ht_oper = NULL; |
|
const struct ieee80211_vht_operation *vht_oper = NULL; |
|
const struct ieee80211_he_operation *he_oper = NULL; |
|
const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; |
|
struct ieee80211_supported_band *sband; |
|
struct cfg80211_chan_def chandef; |
|
bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; |
|
bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; |
|
struct ieee80211_bss *bss = (void *)cbss->priv; |
|
struct ieee802_11_elems *elems; |
|
const struct cfg80211_bss_ies *ies; |
|
int ret; |
|
u32 i; |
|
bool have_80mhz; |
|
|
|
rcu_read_lock(); |
|
|
|
ies = rcu_dereference(cbss->ies); |
|
elems = ieee802_11_parse_elems(ies->data, ies->len, false, |
|
NULL, NULL); |
|
if (!elems) { |
|
rcu_read_unlock(); |
|
return -ENOMEM; |
|
} |
|
|
|
sband = local->hw.wiphy->bands[cbss->channel->band]; |
|
|
|
ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | |
|
IEEE80211_STA_DISABLE_80P80MHZ | |
|
IEEE80211_STA_DISABLE_160MHZ); |
|
|
|
/* disable HT/VHT/HE if we don't support them */ |
|
if (!sband->ht_cap.ht_supported && !is_6ghz) { |
|
mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE\n"); |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HE; |
|
} |
|
|
|
if (!sband->vht_cap.vht_supported && is_5ghz) { |
|
mlme_dbg(sdata, "VHT not supported, disabling VHT/HE\n"); |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HE; |
|
} |
|
|
|
if (!ieee80211_get_he_iftype_cap(sband, |
|
ieee80211_vif_type_p2p(&sdata->vif))) { |
|
mlme_dbg(sdata, "HE not supported, disabling it\n"); |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HE; |
|
} |
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { |
|
ht_oper = elems->ht_operation; |
|
ht_cap = elems->ht_cap_elem; |
|
|
|
if (!ht_cap) { |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
|
ht_oper = NULL; |
|
} |
|
} |
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { |
|
vht_oper = elems->vht_operation; |
|
if (vht_oper && !ht_oper) { |
|
vht_oper = NULL; |
|
sdata_info(sdata, |
|
"AP advertised VHT without HT, disabling HT/VHT/HE\n"); |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HE; |
|
} |
|
|
|
if (!elems->vht_cap_elem) { |
|
sdata_info(sdata, |
|
"bad VHT capabilities, disabling VHT\n"); |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
|
vht_oper = NULL; |
|
} |
|
} |
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { |
|
he_oper = elems->he_operation; |
|
|
|
if (is_6ghz) { |
|
struct ieee80211_bss_conf *bss_conf; |
|
u8 i, j = 0; |
|
|
|
bss_conf = &sdata->vif.bss_conf; |
|
|
|
if (elems->pwr_constr_elem) |
|
bss_conf->pwr_reduction = *elems->pwr_constr_elem; |
|
|
|
BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != |
|
ARRAY_SIZE(elems->tx_pwr_env)); |
|
|
|
for (i = 0; i < elems->tx_pwr_env_num; i++) { |
|
if (elems->tx_pwr_env_len[i] > |
|
sizeof(bss_conf->tx_pwr_env[j])) |
|
continue; |
|
|
|
bss_conf->tx_pwr_env_num++; |
|
memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], |
|
elems->tx_pwr_env_len[i]); |
|
j++; |
|
} |
|
} |
|
|
|
if (!ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HE; |
|
} |
|
|
|
/* Allow VHT if at least one channel on the sband supports 80 MHz */ |
|
have_80mhz = false; |
|
for (i = 0; i < sband->n_channels; i++) { |
|
if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | |
|
IEEE80211_CHAN_NO_80MHZ)) |
|
continue; |
|
|
|
have_80mhz = true; |
|
break; |
|
} |
|
|
|
if (!have_80mhz) { |
|
sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
|
} |
|
|
|
if (sband->band == NL80211_BAND_S1GHZ) { |
|
s1g_oper = elems->s1g_oper; |
|
if (!s1g_oper) |
|
sdata_info(sdata, |
|
"AP missing S1G operation element?\n"); |
|
} |
|
|
|
ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, |
|
cbss->channel, |
|
bss->vht_cap_info, |
|
ht_oper, vht_oper, he_oper, |
|
s1g_oper, |
|
&chandef, false); |
|
|
|
sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), |
|
local->rx_chains); |
|
|
|
rcu_read_unlock(); |
|
/* the element data was RCU protected so no longer valid anyway */ |
|
kfree(elems); |
|
elems = NULL; |
|
|
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { |
|
sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); |
|
return -EINVAL; |
|
} |
|
|
|
/* will change later if needed */ |
|
sdata->smps_mode = IEEE80211_SMPS_OFF; |
|
|
|
mutex_lock(&local->mtx); |
|
/* |
|
* If this fails (possibly due to channel context sharing |
|
* on incompatible channels, e.g. 80+80 and 160 sharing the |
|
* same control channel) try to use a smaller bandwidth. |
|
*/ |
|
ret = ieee80211_vif_use_channel(sdata, &chandef, |
|
IEEE80211_CHANCTX_SHARED); |
|
|
|
/* don't downgrade for 5 and 10 MHz channels, though. */ |
|
if (chandef.width == NL80211_CHAN_WIDTH_5 || |
|
chandef.width == NL80211_CHAN_WIDTH_10) |
|
goto out; |
|
|
|
while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { |
|
ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); |
|
ret = ieee80211_vif_use_channel(sdata, &chandef, |
|
IEEE80211_CHANCTX_SHARED); |
|
} |
|
out: |
|
mutex_unlock(&local->mtx); |
|
return ret; |
|
} |
|
|
|
static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, |
|
u8 *dtim_count, u8 *dtim_period) |
|
{ |
|
const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); |
|
const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, |
|
ies->len); |
|
const struct ieee80211_tim_ie *tim = NULL; |
|
const struct ieee80211_bssid_index *idx; |
|
bool valid = tim_ie && tim_ie[1] >= 2; |
|
|
|
if (valid) |
|
tim = (void *)(tim_ie + 2); |
|
|
|
if (dtim_count) |
|
*dtim_count = valid ? tim->dtim_count : 0; |
|
|
|
if (dtim_period) |
|
*dtim_period = valid ? tim->dtim_period : 0; |
|
|
|
/* Check if value is overridden by non-transmitted profile */ |
|
if (!idx_ie || idx_ie[1] < 3) |
|
return valid; |
|
|
|
idx = (void *)(idx_ie + 2); |
|
|
|
if (dtim_count) |
|
*dtim_count = idx->dtim_count; |
|
|
|
if (dtim_period) |
|
*dtim_period = idx->dtim_period; |
|
|
|
return true; |
|
} |
|
|
|
static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, |
|
struct cfg80211_bss *cbss, bool assoc, |
|
bool override) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct ieee80211_bss *bss = (void *)cbss->priv; |
|
struct sta_info *new_sta = NULL; |
|
struct ieee80211_supported_band *sband; |
|
bool have_sta = false; |
|
int err; |
|
|
|
sband = local->hw.wiphy->bands[cbss->channel->band]; |
|
|
|
if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) |
|
return -EINVAL; |
|
|
|
/* If a reconfig is happening, bail out */ |
|
if (local->in_reconfig) |
|
return -EBUSY; |
|
|
|
if (assoc) { |
|
rcu_read_lock(); |
|
have_sta = sta_info_get(sdata, cbss->bssid); |
|
rcu_read_unlock(); |
|
} |
|
|
|
if (!have_sta) { |
|
new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); |
|
if (!new_sta) |
|
return -ENOMEM; |
|
} |
|
|
|
/* |
|
* 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) { |
|
u32 rates = 0, basic_rates = 0; |
|
bool have_higher_than_11mbit = false; |
|
int min_rate = INT_MAX, min_rate_index = -1; |
|
const struct cfg80211_bss_ies *ies; |
|
int shift = ieee80211_vif_get_shift(&sdata->vif); |
|
|
|
/* TODO: S1G Basic Rate Set is expressed elsewhere */ |
|
if (cbss->channel->band == NL80211_BAND_S1GHZ) { |
|
ieee80211_s1g_sta_rate_init(new_sta); |
|
goto skip_rates; |
|
} |
|
|
|
ieee80211_get_rates(sband, bss->supp_rates, |
|
bss->supp_rates_len, |
|
&rates, &basic_rates, |
|
&have_higher_than_11mbit, |
|
&min_rate, &min_rate_index, |
|
shift); |
|
|
|
/* |
|
* This used to be a workaround for basic rates missing |
|
* in the association response frame. Now that we no |
|
* longer use the basic rates from there, it probably |
|
* doesn't happen any more, but keep the workaround so |
|
* in case some *other* APs are buggy in different ways |
|
* we can connect -- with a warning. |
|
* Allow this workaround only in case the AP provided at least |
|
* one rate. |
|
*/ |
|
if (min_rate_index < 0) { |
|
sdata_info(sdata, |
|
"No legacy rates in association response\n"); |
|
|
|
sta_info_free(local, new_sta); |
|
return -EINVAL; |
|
} else if (!basic_rates) { |
|
sdata_info(sdata, |
|
"No basic rates, using min rate instead\n"); |
|
basic_rates = BIT(min_rate_index); |
|
} |
|
|
|
if (rates) |
|
new_sta->sta.supp_rates[cbss->channel->band] = rates; |
|
else |
|
sdata_info(sdata, |
|
"No rates found, keeping mandatory only\n"); |
|
|
|
sdata->vif.bss_conf.basic_rates = basic_rates; |
|
|
|
/* cf. IEEE 802.11 9.2.12 */ |
|
if (cbss->channel->band == NL80211_BAND_2GHZ && |
|
have_higher_than_11mbit) |
|
sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
|
else |
|
sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
|
|
|
skip_rates: |
|
memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); |
|
|
|
/* set timing information */ |
|
sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; |
|
rcu_read_lock(); |
|
ies = rcu_dereference(cbss->beacon_ies); |
|
if (ies) { |
|
sdata->vif.bss_conf.sync_tsf = ies->tsf; |
|
sdata->vif.bss_conf.sync_device_ts = |
|
bss->device_ts_beacon; |
|
|
|
ieee80211_get_dtim(ies, |
|
&sdata->vif.bss_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 */ |
|
sdata->vif.bss_conf.sync_tsf = ies->tsf; |
|
sdata->vif.bss_conf.sync_device_ts = |
|
bss->device_ts_presp; |
|
sdata->vif.bss_conf.sync_dtim_count = 0; |
|
} else { |
|
sdata->vif.bss_conf.sync_tsf = 0; |
|
sdata->vif.bss_conf.sync_device_ts = 0; |
|
sdata->vif.bss_conf.sync_dtim_count = 0; |
|
} |
|
rcu_read_unlock(); |
|
} |
|
|
|
if (new_sta || override) { |
|
err = ieee80211_prep_channel(sdata, cbss); |
|
if (err) { |
|
if (new_sta) |
|
sta_info_free(local, new_sta); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
if (new_sta) { |
|
/* |
|
* tell driver about BSSID, basic rates and timing |
|
* this was set up above, before setting the channel |
|
*/ |
|
ieee80211_bss_info_change_notify(sdata, |
|
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); |
|
return err; |
|
} |
|
} else |
|
WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); |
|
|
|
/* Cancel scan to ensure that nothing interferes with connection */ |
|
if (local->scanning) |
|
ieee80211_scan_cancel(local); |
|
|
|
return 0; |
|
} |
|
|
|
/* config hooks */ |
|
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |
|
struct cfg80211_auth_request *req) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct ieee80211_mgd_auth_data *auth_data; |
|
u16 auth_alg; |
|
int err; |
|
bool cont_auth; |
|
|
|
/* prepare auth data structure */ |
|
|
|
switch (req->auth_type) { |
|
case NL80211_AUTHTYPE_OPEN_SYSTEM: |
|
auth_alg = WLAN_AUTH_OPEN; |
|
break; |
|
case NL80211_AUTHTYPE_SHARED_KEY: |
|
if (fips_enabled) |
|
return -EOPNOTSUPP; |
|
auth_alg = WLAN_AUTH_SHARED_KEY; |
|
break; |
|
case NL80211_AUTHTYPE_FT: |
|
auth_alg = WLAN_AUTH_FT; |
|
break; |
|
case NL80211_AUTHTYPE_NETWORK_EAP: |
|
auth_alg = WLAN_AUTH_LEAP; |
|
break; |
|
case NL80211_AUTHTYPE_SAE: |
|
auth_alg = WLAN_AUTH_SAE; |
|
break; |
|
case NL80211_AUTHTYPE_FILS_SK: |
|
auth_alg = WLAN_AUTH_FILS_SK; |
|
break; |
|
case NL80211_AUTHTYPE_FILS_SK_PFS: |
|
auth_alg = WLAN_AUTH_FILS_SK_PFS; |
|
break; |
|
case NL80211_AUTHTYPE_FILS_PK: |
|
auth_alg = WLAN_AUTH_FILS_PK; |
|
break; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
if (ifmgd->assoc_data) |
|
return -EBUSY; |
|
|
|
auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + |
|
req->ie_len, GFP_KERNEL); |
|
if (!auth_data) |
|
return -ENOMEM; |
|
|
|
auth_data->bss = req->bss; |
|
|
|
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; |
|
|
|
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, req->bss->bssid); |
|
|
|
if (ifmgd->associated) { |
|
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
|
|
|
sdata_info(sdata, |
|
"disconnect from AP %pM for new auth to %pM\n", |
|
ifmgd->associated->bssid, req->bss->bssid); |
|
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
|
WLAN_REASON_UNSPECIFIED, |
|
false, frame_buf); |
|
|
|
ieee80211_report_disconnect(sdata, frame_buf, |
|
sizeof(frame_buf), true, |
|
WLAN_REASON_UNSPECIFIED, |
|
false); |
|
} |
|
|
|
sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); |
|
|
|
err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); |
|
if (err) |
|
goto err_clear; |
|
|
|
err = ieee80211_auth(sdata); |
|
if (err) { |
|
sta_info_destroy_addr(sdata, req->bss->bssid); |
|
goto err_clear; |
|
} |
|
|
|
/* hold our own reference */ |
|
cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); |
|
return 0; |
|
|
|
err_clear: |
|
eth_zero_addr(ifmgd->bssid); |
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); |
|
ifmgd->auth_data = NULL; |
|
mutex_lock(&sdata->local->mtx); |
|
ieee80211_vif_release_channel(sdata); |
|
mutex_unlock(&sdata->local->mtx); |
|
kfree(auth_data); |
|
return err; |
|
} |
|
|
|
int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
|
struct cfg80211_assoc_request *req) |
|
{ |
|
bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; |
|
bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ; |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
struct ieee80211_bss *bss = (void *)req->bss->priv; |
|
struct ieee80211_mgd_assoc_data *assoc_data; |
|
const struct cfg80211_bss_ies *beacon_ies; |
|
struct ieee80211_supported_band *sband; |
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
|
const struct element *ssid_elem, *ht_elem, *vht_elem; |
|
int i, err; |
|
bool override = false; |
|
|
|
assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); |
|
if (!assoc_data) |
|
return -ENOMEM; |
|
|
|
rcu_read_lock(); |
|
ssid_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_SSID); |
|
if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { |
|
rcu_read_unlock(); |
|
kfree(assoc_data); |
|
return -EINVAL; |
|
} |
|
memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); |
|
assoc_data->ssid_len = ssid_elem->datalen; |
|
memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len); |
|
bss_conf->ssid_len = assoc_data->ssid_len; |
|
rcu_read_unlock(); |
|
|
|
if (ifmgd->associated) { |
|
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
|
|
|
sdata_info(sdata, |
|
"disconnect from AP %pM for new assoc to %pM\n", |
|
ifmgd->associated->bssid, req->bss->bssid); |
|
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
|
WLAN_REASON_UNSPECIFIED, |
|
false, frame_buf); |
|
|
|
ieee80211_report_disconnect(sdata, frame_buf, |
|
sizeof(frame_buf), true, |
|
WLAN_REASON_UNSPECIFIED, |
|
false); |
|
} |
|
|
|
if (ifmgd->auth_data && !ifmgd->auth_data->done) { |
|
err = -EBUSY; |
|
goto err_free; |
|
} |
|
|
|
if (ifmgd->assoc_data) { |
|
err = -EBUSY; |
|
goto err_free; |
|
} |
|
|
|
if (ifmgd->auth_data) { |
|
bool match; |
|
|
|
/* keep sta info, bssid if matching */ |
|
match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); |
|
ieee80211_destroy_auth_data(sdata, match); |
|
} |
|
|
|
/* prepare assoc data */ |
|
|
|
ifmgd->beacon_crc_valid = false; |
|
|
|
assoc_data->wmm = bss->wmm_used && |
|
(local->hw.queues >= IEEE80211_NUM_ACS); |
|
|
|
/* |
|
* IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. |
|
* We still associate in non-HT mode (11a/b/g) if any one of these |
|
* ciphers is configured as pairwise. |
|
* We can set this to true for non-11n hardware, that'll be checked |
|
* separately along with the peer capabilities. |
|
*/ |
|
for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { |
|
if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || |
|
req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || |
|
req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HE; |
|
netdev_info(sdata->dev, |
|
"disabling HT/VHT/HE due to WEP/TKIP use\n"); |
|
} |
|
} |
|
|
|
sband = local->hw.wiphy->bands[req->bss->channel->band]; |
|
|
|
/* also disable HT/VHT/HE if the AP doesn't use WMM */ |
|
if (!bss->wmm_used) { |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HE; |
|
netdev_info(sdata->dev, |
|
"disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); |
|
} |
|
|
|
memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); |
|
memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, |
|
sizeof(ifmgd->ht_capa_mask)); |
|
|
|
memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); |
|
memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, |
|
sizeof(ifmgd->vht_capa_mask)); |
|
|
|
memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); |
|
memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, |
|
sizeof(ifmgd->s1g_capa_mask)); |
|
|
|
if (req->ie && req->ie_len) { |
|
memcpy(assoc_data->ie, req->ie, req->ie_len); |
|
assoc_data->ie_len = req->ie_len; |
|
} |
|
|
|
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); |
|
|
|
assoc_data->bss = req->bss; |
|
assoc_data->capability = req->bss->capability; |
|
assoc_data->supp_rates = bss->supp_rates; |
|
assoc_data->supp_rates_len = bss->supp_rates_len; |
|
|
|
rcu_read_lock(); |
|
ht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_HT_OPERATION); |
|
if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) |
|
assoc_data->ap_ht_param = |
|
((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; |
|
else if (!is_6ghz) |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
|
vht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_VHT_CAPABILITY); |
|
if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { |
|
memcpy(&assoc_data->ap_vht_cap, vht_elem->data, |
|
sizeof(struct ieee80211_vht_cap)); |
|
} else if (is_5ghz) { |
|
sdata_info(sdata, "VHT capa missing/short, disabling VHT/HE\n"); |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | |
|
IEEE80211_STA_DISABLE_HE; |
|
} |
|
rcu_read_unlock(); |
|
|
|
if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && |
|
ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), |
|
"U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) |
|
sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; |
|
|
|
if (bss->wmm_used && bss->uapsd_supported && |
|
(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { |
|
assoc_data->uapsd = true; |
|
ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; |
|
} else { |
|
assoc_data->uapsd = false; |
|
ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; |
|
} |
|
|
|
if (req->prev_bssid) |
|
memcpy(assoc_data->prev_bssid, 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; |
|
sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, |
|
sdata->vif.type); |
|
|
|
/* kick off associate process */ |
|
|
|
ifmgd->assoc_data = assoc_data; |
|
ifmgd->dtim_period = 0; |
|
ifmgd->have_beacon = false; |
|
|
|
/* override HT/VHT configuration only if the AP and we support it */ |
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { |
|
struct ieee80211_sta_ht_cap sta_ht_cap; |
|
|
|
if (req->flags & ASSOC_REQ_DISABLE_HT) |
|
override = true; |
|
|
|
memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); |
|
ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); |
|
|
|
/* check for 40 MHz disable override */ |
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && |
|
sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && |
|
!(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) |
|
override = true; |
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && |
|
req->flags & ASSOC_REQ_DISABLE_VHT) |
|
override = true; |
|
} |
|
|
|
if (req->flags & ASSOC_REQ_DISABLE_HT) { |
|
mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HE; |
|
} |
|
|
|
if (req->flags & ASSOC_REQ_DISABLE_VHT) { |
|
mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
|
} |
|
|
|
if (req->flags & ASSOC_REQ_DISABLE_HE) { |
|
mlme_dbg(sdata, "HE disabled by flag, disabling VHT\n"); |
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HE; |
|
} |
|
|
|
err = ieee80211_prep_connection(sdata, req->bss, true, override); |
|
if (err) |
|
goto err_clear; |
|
|
|
if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { |
|
if (ifmgd->powersave) |
|
sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; |
|
else |
|
sdata->smps_mode = IEEE80211_SMPS_OFF; |
|
} else { |
|
sdata->smps_mode = ifmgd->req_smps; |
|
} |
|
|
|
rcu_read_lock(); |
|
beacon_ies = rcu_dereference(req->bss->beacon_ies); |
|
|
|
if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && |
|
!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", |
|
ifmgd->bssid); |
|
assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); |
|
assoc_data->timeout_started = true; |
|
assoc_data->need_beacon = true; |
|
} else if (beacon_ies) { |
|
const struct element *elem; |
|
u8 dtim_count = 0; |
|
|
|
ieee80211_get_dtim(beacon_ies, &dtim_count, |
|
&ifmgd->dtim_period); |
|
|
|
ifmgd->have_beacon = true; |
|
assoc_data->timeout = jiffies; |
|
assoc_data->timeout_started = true; |
|
|
|
if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { |
|
sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; |
|
sdata->vif.bss_conf.sync_device_ts = |
|
bss->device_ts_beacon; |
|
sdata->vif.bss_conf.sync_dtim_count = dtim_count; |
|
} |
|
|
|
elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, |
|
beacon_ies->data, beacon_ies->len); |
|
if (elem && elem->datalen >= 3) |
|
sdata->vif.bss_conf.profile_periodicity = elem->data[2]; |
|
else |
|
sdata->vif.bss_conf.profile_periodicity = 0; |
|
|
|
elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, |
|
beacon_ies->data, beacon_ies->len); |
|
if (elem && elem->datalen >= 11 && |
|
(elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) |
|
sdata->vif.bss_conf.ema_ap = true; |
|
else |
|
sdata->vif.bss_conf.ema_ap = false; |
|
} else { |
|
assoc_data->timeout = jiffies; |
|
assoc_data->timeout_started = true; |
|
} |
|
rcu_read_unlock(); |
|
|
|
run_again(sdata, assoc_data->timeout); |
|
|
|
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 with AP with corrupt %s\n", |
|
corrupt_type); |
|
} |
|
|
|
return 0; |
|
err_clear: |
|
eth_zero_addr(ifmgd->bssid); |
|
ieee80211_bss_info_change_notify(sdata, 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->bss->bssid, req->bssid)) { |
|
sdata_info(sdata, |
|
"aborting authentication with %pM by local choice (Reason: %u=%s)\n", |
|
req->bssid, req->reason_code, |
|
ieee80211_get_reason_code_string(req->reason_code)); |
|
|
|
drv_mgd_prepare_tx(sdata->local, sdata, &info); |
|
ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, |
|
IEEE80211_STYPE_DEAUTH, |
|
req->reason_code, tx, |
|
frame_buf); |
|
ieee80211_destroy_auth_data(sdata, false); |
|
ieee80211_report_disconnect(sdata, frame_buf, |
|
sizeof(frame_buf), true, |
|
req->reason_code, false); |
|
drv_mgd_complete_tx(sdata->local, sdata, &info); |
|
return 0; |
|
} |
|
|
|
if (ifmgd->assoc_data && |
|
ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { |
|
sdata_info(sdata, |
|
"aborting association with %pM by local choice (Reason: %u=%s)\n", |
|
req->bssid, req->reason_code, |
|
ieee80211_get_reason_code_string(req->reason_code)); |
|
|
|
drv_mgd_prepare_tx(sdata->local, sdata, &info); |
|
ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, |
|
IEEE80211_STYPE_DEAUTH, |
|
req->reason_code, tx, |
|
frame_buf); |
|
ieee80211_destroy_assoc_data(sdata, false, true); |
|
ieee80211_report_disconnect(sdata, frame_buf, |
|
sizeof(frame_buf), true, |
|
req->reason_code, false); |
|
return 0; |
|
} |
|
|
|
if (ifmgd->associated && |
|
ether_addr_equal(ifmgd->associated->bssid, 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) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
u8 bssid[ETH_ALEN]; |
|
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
|
|
|
/* |
|
* cfg80211 should catch this ... but it's racy since |
|
* we can receive a disassoc frame, process it, hand it |
|
* to cfg80211 while that's in a locked section already |
|
* trying to tell us that the user wants to disconnect. |
|
*/ |
|
if (ifmgd->associated != req->bss) |
|
return -ENOLINK; |
|
|
|
sdata_info(sdata, |
|
"disassociating from %pM by local choice (Reason: %u=%s)\n", |
|
req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); |
|
|
|
memcpy(bssid, req->bss->bssid, ETH_ALEN); |
|
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(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
|
|
|
/* |
|
* Make sure some work items will not run after this, |
|
* they will not do anything but might not have been |
|
* cancelled when disconnecting. |
|
*/ |
|
cancel_work_sync(&ifmgd->monitor_work); |
|
cancel_work_sync(&ifmgd->beacon_connection_loss_work); |
|
cancel_work_sync(&ifmgd->request_smps_work); |
|
cancel_work_sync(&ifmgd->csa_connection_drop_work); |
|
cancel_work_sync(&ifmgd->chswitch_work); |
|
cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); |
|
|
|
sdata_lock(sdata); |
|
if (ifmgd->assoc_data) { |
|
struct cfg80211_bss *bss = ifmgd->assoc_data->bss; |
|
ieee80211_destroy_assoc_data(sdata, false, false); |
|
cfg80211_assoc_timeout(sdata->dev, bss); |
|
} |
|
if (ifmgd->auth_data) |
|
ieee80211_destroy_auth_data(sdata, false); |
|
spin_lock_bh(&ifmgd->teardown_lock); |
|
if (ifmgd->teardown_skb) { |
|
kfree_skb(ifmgd->teardown_skb); |
|
ifmgd->teardown_skb = NULL; |
|
ifmgd->orig_teardown_skb = NULL; |
|
} |
|
kfree(ifmgd->assoc_req_ies); |
|
ifmgd->assoc_req_ies = NULL; |
|
ifmgd->assoc_req_ies_len = 0; |
|
spin_unlock_bh(&ifmgd->teardown_lock); |
|
del_timer_sync(&ifmgd->timer); |
|
sdata_unlock(sdata); |
|
} |
|
|
|
void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, |
|
enum nl80211_cqm_rssi_threshold_event rssi_event, |
|
s32 rssi_level, |
|
gfp_t gfp) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
|
|
|
trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); |
|
|
|
cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); |
|
} |
|
EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); |
|
|
|
void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
|
|
|
trace_api_cqm_beacon_loss_notify(sdata->local, sdata); |
|
|
|
cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); |
|
} |
|
EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
|
|
|