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wifi: mac80211: mlme: refactor link station setup

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Refactor the code here since we need to have it also for each
link station after association in MLO later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2022-07-12 11:06:33 +02:00
parent 39eac2de00
commit bbe90107e1
1 changed files with 65 additions and 54 deletions
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119
net/mac80211/mlme.c
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@ -3485,6 +3485,67 @@ static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
IEEE80211_HE_MAC_CAP2_BCAST_TWT);
}
static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link,
struct sta_info *sta,
struct ieee80211_link_sta *link_sta,
struct cfg80211_bss *cbss)
{
struct ieee80211_sub_if_data *sdata = link->sdata;
struct ieee80211_local *local = sdata->local;
struct ieee80211_bss *bss = (void *)cbss->priv;
u32 rates = 0, basic_rates = 0;
bool have_higher_than_11mbit = false;
int min_rate = INT_MAX, min_rate_index = -1;
/* this is clearly wrong for MLO but we'll just remove it later */
int shift = ieee80211_vif_get_shift(&sdata->vif);
struct ieee80211_supported_band *sband;
memcpy(link_sta->addr, cbss->bssid, ETH_ALEN);
/* TODO: S1G Basic Rate Set is expressed elsewhere */
if (cbss->channel->band == NL80211_BAND_S1GHZ) {
ieee80211_s1g_sta_rate_init(sta);
return 0;
}
sband = local->hw.wiphy->bands[cbss->channel->band];
ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len,
&rates, &basic_rates, &have_higher_than_11mbit,
&min_rate, &min_rate_index, shift);
/*
* This used to be a workaround for basic rates missing
* in the association response frame. Now that we no
* longer use the basic rates from there, it probably
* doesn't happen any more, but keep the workaround so
* in case some *other* APs are buggy in different ways
* we can connect -- with a warning.
* Allow this workaround only in case the AP provided at least
* one rate.
*/
if (min_rate_index < 0) {
link_info(link, "No legacy rates in association response\n");
return -EINVAL;
} else if (!basic_rates) {
link_info(link, "No basic rates, using min rate instead\n");
basic_rates = BIT(min_rate_index);
}
if (rates)
link_sta->supp_rates[cbss->channel->band] = rates;
else
link_info(link, "No rates found, keeping mandatory only\n");
link->conf->basic_rates = basic_rates;
/* cf. IEEE 802.11 9.2.12 */
link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ &&
have_higher_than_11mbit;
return 0;
}
static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
struct cfg80211_bss *cbss,
struct ieee80211_mgmt *mgmt, size_t len,
@ -5718,13 +5779,10 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
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;
struct ieee80211_link_data *link = &sdata->deflink;
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;
@ -5758,63 +5816,16 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
* 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);
struct ieee80211_link_sta *link_sta = &new_sta->sta.deflink;
memcpy(link_sta->addr, cbss->bssid, ETH_ALEN);
/* TODO: S1G Basic Rate Set is expressed elsewhere */
if (cbss->channel->band == NL80211_BAND_S1GHZ) {
ieee80211_s1g_sta_rate_init(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");
err = ieee80211_mgd_setup_link_sta(link, new_sta,
link_sta, cbss);
if (err) {
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);
return err;
}
if (rates)
link_sta->supp_rates[cbss->channel->band] = rates;
else
sdata_info(sdata,
"No rates found, keeping mandatory only\n");
link->conf->basic_rates = basic_rates;
/* cf. IEEE 802.11 9.2.12 */
link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ &&
have_higher_than_11mbit;
skip_rates:
memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
/* set timing information */