hostap/src/ap/ieee802_11_vht.c
Johannes Berg 851b73eb28 hostapd: Make VHT IE struct more expressive
The VHT IE struct just has an opaque 8-byte array for the MCS
set, make it more expressive by explicitly naming the pieces.

Signed-hostap: Johannes Berg <johannes.berg@intel.com>
2013-03-01 18:24:57 +02:00

121 lines
3.1 KiB
C

/*
* hostapd / IEEE 802.11ac VHT
* Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of BSD license
*
* See README and COPYING for more details.
*/
#include "utils/includes.h"
#include "utils/common.h"
#include "common/ieee802_11_defs.h"
#include "drivers/driver.h"
#include "hostapd.h"
#include "ap_config.h"
#include "sta_info.h"
#include "beacon.h"
#include "ieee802_11.h"
u8 * hostapd_eid_vht_capabilities(struct hostapd_data *hapd, u8 *eid)
{
struct ieee80211_vht_capabilities *cap;
u8 *pos = eid;
if (!hapd->iconf->ieee80211ac || !hapd->iface->current_mode ||
hapd->conf->disable_11ac)
return eid;
*pos++ = WLAN_EID_VHT_CAP;
*pos++ = sizeof(*cap);
cap = (struct ieee80211_vht_capabilities *) pos;
os_memset(cap, 0, sizeof(*cap));
cap->vht_capabilities_info = host_to_le32(
hapd->iface->current_mode->vht_capab);
/* Supported MCS set comes from hw */
os_memcpy(&cap->vht_supported_mcs_set,
hapd->iface->current_mode->vht_mcs_set, 8);
pos += sizeof(*cap);
return pos;
}
u8 * hostapd_eid_vht_operation(struct hostapd_data *hapd, u8 *eid)
{
struct ieee80211_vht_operation *oper;
u8 *pos = eid;
if (!hapd->iconf->ieee80211ac || hapd->conf->disable_11ac)
return eid;
*pos++ = WLAN_EID_VHT_OPERATION;
*pos++ = sizeof(*oper);
oper = (struct ieee80211_vht_operation *) pos;
os_memset(oper, 0, sizeof(*oper));
/*
* center freq = 5 GHz + (5 * index)
* So index 42 gives center freq 5.210 GHz
* which is channel 42 in 5G band
*/
oper->vht_op_info_chan_center_freq_seg0_idx =
hapd->iconf->vht_oper_centr_freq_seg0_idx;
oper->vht_op_info_chan_center_freq_seg1_idx =
hapd->iconf->vht_oper_centr_freq_seg1_idx;
oper->vht_op_info_chwidth = hapd->iconf->vht_oper_chwidth;
/* VHT Basic MCS set comes from hw */
/* Hard code 1 stream, MCS0-7 is a min Basic VHT MCS rates */
oper->vht_basic_mcs_set = host_to_le16(0xfffc);
pos += sizeof(*oper);
return pos;
}
u16 copy_sta_vht_capab(struct hostapd_data *hapd, struct sta_info *sta,
const u8 *vht_capab, size_t vht_capab_len)
{
/* Disable VHT caps for STAs associated to no-VHT BSSes. */
if (!vht_capab ||
vht_capab_len < sizeof(struct ieee80211_vht_capabilities) ||
hapd->conf->disable_11ac) {
sta->flags &= ~WLAN_STA_VHT;
os_free(sta->vht_capabilities);
sta->vht_capabilities = NULL;
return WLAN_STATUS_SUCCESS;
}
if (sta->vht_capabilities == NULL) {
sta->vht_capabilities =
os_zalloc(sizeof(struct ieee80211_vht_capabilities));
if (sta->vht_capabilities == NULL)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
sta->flags |= WLAN_STA_VHT;
os_memcpy(sta->vht_capabilities, vht_capab,
sizeof(struct ieee80211_vht_capabilities));
return WLAN_STATUS_SUCCESS;
}
void hostapd_get_vht_capab(struct hostapd_data *hapd,
struct ieee80211_vht_capabilities *vht_cap,
struct ieee80211_vht_capabilities *neg_vht_cap)
{
if (vht_cap == NULL)
return;
os_memcpy(neg_vht_cap, vht_cap, sizeof(*neg_vht_cap));
/* TODO: mask own capabilities, like get_ht_capab() */
}