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// SPDX-License-Identifier: GPL-2.0
/*
* S1G handling
* Copyright(c) 2020 Adapt-IP
*/
#include <linux/ieee80211.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
void ieee80211_s1g_sta_rate_init(struct sta_info *sta)
{
/* avoid indicating legacy bitrates for S1G STAs */
sta->tx_stats.last_rate.flags |= IEEE80211_TX_RC_S1G_MCS;
sta->rx_stats.last_rate =
STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_S1G);
}
bool ieee80211_s1g_is_twt_setup(struct sk_buff *skb)
{
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
if (likely(!ieee80211_is_action(mgmt->frame_control)))
return false;
if (likely(mgmt->u.action.category != WLAN_CATEGORY_S1G))
return false;
return mgmt->u.action.u.s1g.action_code == WLAN_S1G_TWT_SETUP;
}
static void
ieee80211_s1g_send_twt_setup(struct ieee80211_sub_if_data *sdata, const u8 *da,
const u8 *bssid, struct ieee80211_twt_setup *twt)
{
int len = IEEE80211_MIN_ACTION_SIZE + 4 + twt->length;
struct ieee80211_local *local = sdata->local;
struct ieee80211_mgmt *mgmt;
struct sk_buff *skb;
skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
if (!skb)
return;
skb_reserve(skb, local->hw.extra_tx_headroom);
mgmt = skb_put_zero(skb, len);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_ACTION);
memcpy(mgmt->da, da, ETH_ALEN);
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
memcpy(mgmt->bssid, bssid, ETH_ALEN);
mgmt->u.action.category = WLAN_CATEGORY_S1G;
mgmt->u.action.u.s1g.action_code = WLAN_S1G_TWT_SETUP;
memcpy(mgmt->u.action.u.s1g.variable, twt, 3 + twt->length);
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
IEEE80211_TX_INTFL_MLME_CONN_TX |
IEEE80211_TX_CTL_REQ_TX_STATUS;
ieee80211_tx_skb(sdata, skb);
}
static void
ieee80211_s1g_send_twt_teardown(struct ieee80211_sub_if_data *sdata,
const u8 *da, const u8 *bssid, u8 flowid)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_mgmt *mgmt;
struct sk_buff *skb;
u8 *id;
skb = dev_alloc_skb(local->hw.extra_tx_headroom +
IEEE80211_MIN_ACTION_SIZE + 2);
if (!skb)
return;
skb_reserve(skb, local->hw.extra_tx_headroom);
mgmt = skb_put_zero(skb, IEEE80211_MIN_ACTION_SIZE + 2);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_ACTION);
memcpy(mgmt->da, da, ETH_ALEN);
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
memcpy(mgmt->bssid, bssid, ETH_ALEN);
mgmt->u.action.category = WLAN_CATEGORY_S1G;
mgmt->u.action.u.s1g.action_code = WLAN_S1G_TWT_TEARDOWN;
id = (u8 *)mgmt->u.action.u.s1g.variable;
*id = flowid;
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
IEEE80211_TX_CTL_REQ_TX_STATUS;
ieee80211_tx_skb(sdata, skb);
}
static void
ieee80211_s1g_rx_twt_setup(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta, struct sk_buff *skb)
{
struct ieee80211_mgmt *mgmt = (void *)skb->data;
struct ieee80211_twt_setup *twt = (void *)mgmt->u.action.u.s1g.variable;
struct ieee80211_twt_params *twt_agrt = (void *)twt->params;
twt_agrt->req_type &= cpu_to_le16(~IEEE80211_TWT_REQTYPE_REQUEST);
/* broadcast TWT not supported yet */
if (twt->control & IEEE80211_TWT_CONTROL_NEG_TYPE_BROADCAST) {
le16p_replace_bits(&twt_agrt->req_type,
TWT_SETUP_CMD_REJECT,
IEEE80211_TWT_REQTYPE_SETUP_CMD);
goto out;
}
drv_add_twt_setup(sdata->local, sdata, &sta->sta, twt);
out:
ieee80211_s1g_send_twt_setup(sdata, mgmt->sa, sdata->vif.addr, twt);
}
static void
ieee80211_s1g_rx_twt_teardown(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta, struct sk_buff *skb)
{
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
drv_twt_teardown_request(sdata->local, sdata, &sta->sta,
mgmt->u.action.u.s1g.variable[0]);
}
static void
ieee80211_s1g_tx_twt_setup_fail(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta, struct sk_buff *skb)
{
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
struct ieee80211_twt_setup *twt = (void *)mgmt->u.action.u.s1g.variable;
struct ieee80211_twt_params *twt_agrt = (void *)twt->params;
u8 flowid = le16_get_bits(twt_agrt->req_type,
IEEE80211_TWT_REQTYPE_FLOWID);
drv_twt_teardown_request(sdata->local, sdata, &sta->sta, flowid);
ieee80211_s1g_send_twt_teardown(sdata, mgmt->sa, sdata->vif.addr,
flowid);
}
void ieee80211_s1g_rx_twt_action(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb)
{
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
mutex_lock(&local->sta_mtx);
sta = sta_info_get_bss(sdata, mgmt->sa);
if (!sta)
goto out;
switch (mgmt->u.action.u.s1g.action_code) {
case WLAN_S1G_TWT_SETUP:
ieee80211_s1g_rx_twt_setup(sdata, sta, skb);
break;
case WLAN_S1G_TWT_TEARDOWN:
ieee80211_s1g_rx_twt_teardown(sdata, sta, skb);
break;
default:
break;
}
out:
mutex_unlock(&local->sta_mtx);
}
void ieee80211_s1g_status_twt_action(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb)
{
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
mutex_lock(&local->sta_mtx);
sta = sta_info_get_bss(sdata, mgmt->da);
if (!sta)
goto out;
switch (mgmt->u.action.u.s1g.action_code) {
case WLAN_S1G_TWT_SETUP:
/* process failed twt setup frames */
ieee80211_s1g_tx_twt_setup_fail(sdata, sta, skb);
break;
default:
break;
}
out:
mutex_unlock(&local->sta_mtx);
}
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