mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 06:30:53 +07:00
mac80211: support extended channel switch
Support extended channel switch when the operating class is one of the global operating classes as defined in Annex E of 802.11-2012. If it isn't, disconnect from the AP instead. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
parent
1ce3e82b0e
commit
b4f286a1c0
@ -672,6 +672,18 @@ struct ieee80211_channel_sw_ie {
|
||||
u8 count;
|
||||
} __packed;
|
||||
|
||||
/**
|
||||
* struct ieee80211_ext_chansw_ie
|
||||
*
|
||||
* This structure represents the "Extended Channel Switch Announcement element"
|
||||
*/
|
||||
struct ieee80211_ext_chansw_ie {
|
||||
u8 mode;
|
||||
u8 new_operating_class;
|
||||
u8 new_ch_num;
|
||||
u8 count;
|
||||
} __packed;
|
||||
|
||||
/**
|
||||
* struct ieee80211_tim
|
||||
*
|
||||
|
||||
@ -1178,6 +1178,7 @@ struct ieee802_11_elems {
|
||||
const u8 *perr;
|
||||
const struct ieee80211_rann_ie *rann;
|
||||
const struct ieee80211_channel_sw_ie *ch_switch_ie;
|
||||
const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
|
||||
const u8 *country_elem;
|
||||
const u8 *pwr_constr_elem;
|
||||
const struct ieee80211_timeout_interval_ie *timeout_int;
|
||||
|
||||
@ -1024,56 +1024,79 @@ static void
|
||||
ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
|
||||
u64 timestamp, struct ieee802_11_elems *elems)
|
||||
{
|
||||
struct ieee80211_local *local = sdata->local;
|
||||
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
||||
struct cfg80211_bss *cbss = ifmgd->associated;
|
||||
struct ieee80211_bss *bss;
|
||||
struct ieee80211_channel *new_ch;
|
||||
int new_freq;
|
||||
struct ieee80211_chanctx *chanctx;
|
||||
enum ieee80211_band new_band;
|
||||
int new_freq;
|
||||
u8 new_chan_no;
|
||||
u8 count;
|
||||
u8 mode;
|
||||
|
||||
ASSERT_MGD_MTX(ifmgd);
|
||||
|
||||
if (!cbss)
|
||||
return;
|
||||
|
||||
if (sdata->local->scanning)
|
||||
if (local->scanning)
|
||||
return;
|
||||
|
||||
/* disregard subsequent announcements if we are already processing */
|
||||
if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
|
||||
return;
|
||||
|
||||
if (!elems->ch_switch_ie)
|
||||
if (elems->ext_chansw_ie) {
|
||||
if (!ieee80211_operating_class_to_band(
|
||||
elems->ext_chansw_ie->new_operating_class,
|
||||
&new_band)) {
|
||||
sdata_info(sdata,
|
||||
"cannot understand ECSA IE operating class %d, disconnecting\n",
|
||||
elems->ext_chansw_ie->new_operating_class);
|
||||
ieee80211_queue_work(&local->hw,
|
||||
&ifmgd->csa_connection_drop_work);
|
||||
}
|
||||
new_chan_no = elems->ext_chansw_ie->new_ch_num;
|
||||
count = elems->ext_chansw_ie->count;
|
||||
mode = elems->ext_chansw_ie->mode;
|
||||
} else if (elems->ch_switch_ie) {
|
||||
new_band = cbss->channel->band;
|
||||
new_chan_no = elems->ch_switch_ie->new_ch_num;
|
||||
count = elems->ch_switch_ie->count;
|
||||
mode = elems->ch_switch_ie->mode;
|
||||
} else {
|
||||
/* nothing here we understand */
|
||||
return;
|
||||
}
|
||||
|
||||
bss = (void *)cbss->priv;
|
||||
|
||||
new_freq = ieee80211_channel_to_frequency(
|
||||
elems->ch_switch_ie->new_ch_num,
|
||||
cbss->channel->band);
|
||||
new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
|
||||
new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
|
||||
new_ch = ieee80211_get_channel(local->hw.wiphy, new_freq);
|
||||
if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
|
||||
sdata_info(sdata,
|
||||
"AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
|
||||
ifmgd->associated->bssid, new_freq);
|
||||
ieee80211_queue_work(&sdata->local->hw,
|
||||
ieee80211_queue_work(&local->hw,
|
||||
&ifmgd->csa_connection_drop_work);
|
||||
return;
|
||||
}
|
||||
|
||||
ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
|
||||
|
||||
if (sdata->local->use_chanctx) {
|
||||
if (local->use_chanctx) {
|
||||
sdata_info(sdata,
|
||||
"not handling channel switch with channel contexts\n");
|
||||
ieee80211_queue_work(&sdata->local->hw,
|
||||
ieee80211_queue_work(&local->hw,
|
||||
&ifmgd->csa_connection_drop_work);
|
||||
return;
|
||||
}
|
||||
|
||||
mutex_lock(&sdata->local->chanctx_mtx);
|
||||
mutex_lock(&local->chanctx_mtx);
|
||||
if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
|
||||
mutex_unlock(&sdata->local->chanctx_mtx);
|
||||
mutex_unlock(&local->chanctx_mtx);
|
||||
return;
|
||||
}
|
||||
chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
|
||||
@ -1081,40 +1104,39 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
|
||||
if (chanctx->refcount > 1) {
|
||||
sdata_info(sdata,
|
||||
"channel switch with multiple interfaces on the same channel, disconnecting\n");
|
||||
ieee80211_queue_work(&sdata->local->hw,
|
||||
ieee80211_queue_work(&local->hw,
|
||||
&ifmgd->csa_connection_drop_work);
|
||||
mutex_unlock(&sdata->local->chanctx_mtx);
|
||||
mutex_unlock(&local->chanctx_mtx);
|
||||
return;
|
||||
}
|
||||
mutex_unlock(&sdata->local->chanctx_mtx);
|
||||
mutex_unlock(&local->chanctx_mtx);
|
||||
|
||||
sdata->local->csa_channel = new_ch;
|
||||
local->csa_channel = new_ch;
|
||||
|
||||
if (elems->ch_switch_ie->mode)
|
||||
ieee80211_stop_queues_by_reason(&sdata->local->hw,
|
||||
if (mode)
|
||||
ieee80211_stop_queues_by_reason(&local->hw,
|
||||
IEEE80211_MAX_QUEUE_MAP,
|
||||
IEEE80211_QUEUE_STOP_REASON_CSA);
|
||||
|
||||
if (sdata->local->ops->channel_switch) {
|
||||
if (local->ops->channel_switch) {
|
||||
/* use driver's channel switch callback */
|
||||
struct ieee80211_channel_switch ch_switch = {
|
||||
.timestamp = timestamp,
|
||||
.block_tx = elems->ch_switch_ie->mode,
|
||||
.block_tx = mode,
|
||||
.channel = new_ch,
|
||||
.count = elems->ch_switch_ie->count,
|
||||
.count = count,
|
||||
};
|
||||
|
||||
drv_channel_switch(sdata->local, &ch_switch);
|
||||
drv_channel_switch(local, &ch_switch);
|
||||
return;
|
||||
}
|
||||
|
||||
/* channel switch handled in software */
|
||||
if (elems->ch_switch_ie->count <= 1)
|
||||
ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
|
||||
if (count <= 1)
|
||||
ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
|
||||
else
|
||||
mod_timer(&ifmgd->chswitch_timer,
|
||||
TU_TO_EXP_TIME(elems->ch_switch_ie->count *
|
||||
cbss->beacon_interval));
|
||||
TU_TO_EXP_TIME(count * cbss->beacon_interval));
|
||||
}
|
||||
|
||||
static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
|
||||
@ -2629,6 +2651,8 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
|
||||
struct ieee80211_channel *channel;
|
||||
bool need_ps = false;
|
||||
|
||||
lockdep_assert_held(&sdata->u.mgd.mtx);
|
||||
|
||||
if ((sdata->u.mgd.associated &&
|
||||
ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
|
||||
(sdata->u.mgd.assoc_data &&
|
||||
@ -2670,6 +2694,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
|
||||
}
|
||||
|
||||
ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, elems);
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
@ -863,6 +863,13 @@ u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
|
||||
}
|
||||
elems->ch_switch_ie = (void *)pos;
|
||||
break;
|
||||
case WLAN_EID_EXT_CHANSWITCH_ANN:
|
||||
if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
|
||||
elem_parse_failed = true;
|
||||
break;
|
||||
}
|
||||
elems->ext_chansw_ie = (void *)pos;
|
||||
break;
|
||||
case WLAN_EID_COUNTRY:
|
||||
elems->country_elem = pos;
|
||||
elems->country_elem_len = elen;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user