1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
// 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->deflink.tx_stats.last_rate.flags |= IEEE80211_TX_RC_S1G_MCS;
sta->deflink.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) {
twt_agrt->req_type &=
~cpu_to_le16(IEEE80211_TWT_REQTYPE_SETUP_CMD);
twt_agrt->req_type |=
le16_encode_bits(TWT_SETUP_CMD_REJECT,
IEEE80211_TWT_REQTYPE_SETUP_CMD);
goto out;
}
/* TWT Information not supported yet */
twt->control |= IEEE80211_TWT_CONTROL_RX_DISABLED;
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);
}
|
