1 /*
2 * hostapd / IEEE 802.11ac VHT
3 * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of BSD license
7 *
8 * See README and COPYING for more details.
9 */
10
11 #include "utils/includes.h"
12
13 #include "utils/common.h"
14 #include "common/ieee802_11_defs.h"
15 #include "drivers/driver.h"
16 #include "hostapd.h"
17 #include "ap_config.h"
18 #include "sta_info.h"
19 #include "beacon.h"
20 #include "ieee802_11.h"
21
22
hostapd_eid_vht_capabilities(struct hostapd_data * hapd,u8 * eid)23 u8 * hostapd_eid_vht_capabilities(struct hostapd_data *hapd, u8 *eid)
24 {
25 struct ieee80211_vht_capabilities *cap;
26 u8 *pos = eid;
27
28 if (!hapd->iconf->ieee80211ac || !hapd->iface->current_mode ||
29 hapd->conf->disable_11ac)
30 return eid;
31
32 *pos++ = WLAN_EID_VHT_CAP;
33 *pos++ = sizeof(*cap);
34
35 cap = (struct ieee80211_vht_capabilities *) pos;
36 os_memset(cap, 0, sizeof(*cap));
37 cap->vht_capabilities_info = host_to_le32(
38 hapd->iface->current_mode->vht_capab);
39
40 /* Supported MCS set comes from hw */
41 os_memcpy(&cap->vht_supported_mcs_set,
42 hapd->iface->current_mode->vht_mcs_set, 8);
43
44 pos += sizeof(*cap);
45
46 return pos;
47 }
48
49
hostapd_eid_vht_operation(struct hostapd_data * hapd,u8 * eid)50 u8 * hostapd_eid_vht_operation(struct hostapd_data *hapd, u8 *eid)
51 {
52 struct ieee80211_vht_operation *oper;
53 u8 *pos = eid;
54
55 if (!hapd->iconf->ieee80211ac || hapd->conf->disable_11ac)
56 return eid;
57
58 *pos++ = WLAN_EID_VHT_OPERATION;
59 *pos++ = sizeof(*oper);
60
61 oper = (struct ieee80211_vht_operation *) pos;
62 os_memset(oper, 0, sizeof(*oper));
63
64 /*
65 * center freq = 5 GHz + (5 * index)
66 * So index 42 gives center freq 5.210 GHz
67 * which is channel 42 in 5G band
68 */
69 oper->vht_op_info_chan_center_freq_seg0_idx =
70 hapd->iconf->vht_oper_centr_freq_seg0_idx;
71 oper->vht_op_info_chan_center_freq_seg1_idx =
72 hapd->iconf->vht_oper_centr_freq_seg1_idx;
73
74 oper->vht_op_info_chwidth = hapd->iconf->vht_oper_chwidth;
75
76 /* VHT Basic MCS set comes from hw */
77 /* Hard code 1 stream, MCS0-7 is a min Basic VHT MCS rates */
78 oper->vht_basic_mcs_set = host_to_le16(0xfffc);
79 pos += sizeof(*oper);
80
81 return pos;
82 }
83
84
copy_sta_vht_capab(struct hostapd_data * hapd,struct sta_info * sta,const u8 * vht_capab,size_t vht_capab_len)85 u16 copy_sta_vht_capab(struct hostapd_data *hapd, struct sta_info *sta,
86 const u8 *vht_capab, size_t vht_capab_len)
87 {
88 /* Disable VHT caps for STAs associated to no-VHT BSSes. */
89 if (!vht_capab ||
90 vht_capab_len < sizeof(struct ieee80211_vht_capabilities) ||
91 hapd->conf->disable_11ac) {
92 sta->flags &= ~WLAN_STA_VHT;
93 os_free(sta->vht_capabilities);
94 sta->vht_capabilities = NULL;
95 return WLAN_STATUS_SUCCESS;
96 }
97
98 if (sta->vht_capabilities == NULL) {
99 sta->vht_capabilities =
100 os_zalloc(sizeof(struct ieee80211_vht_capabilities));
101 if (sta->vht_capabilities == NULL)
102 return WLAN_STATUS_UNSPECIFIED_FAILURE;
103 }
104
105 sta->flags |= WLAN_STA_VHT;
106 os_memcpy(sta->vht_capabilities, vht_capab,
107 sizeof(struct ieee80211_vht_capabilities));
108
109 return WLAN_STATUS_SUCCESS;
110 }
111
hostapd_get_vht_capab(struct hostapd_data * hapd,struct ieee80211_vht_capabilities * vht_cap,struct ieee80211_vht_capabilities * neg_vht_cap)112 void hostapd_get_vht_capab(struct hostapd_data *hapd,
113 struct ieee80211_vht_capabilities *vht_cap,
114 struct ieee80211_vht_capabilities *neg_vht_cap)
115 {
116 if (vht_cap == NULL)
117 return;
118 os_memcpy(neg_vht_cap, vht_cap, sizeof(*neg_vht_cap));
119
120 /* TODO: mask own capabilities, like get_ht_capab() */
121 }
122