77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* EHT handling
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*
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* Copyright(c) 2021-2022 Intel Corporation
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*/
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#include "ieee80211_i.h"
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void
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ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_supported_band *sband,
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const u8 *he_cap_ie, u8 he_cap_len,
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const struct ieee80211_eht_cap_elem *eht_cap_ie_elem,
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u8 eht_cap_len, struct sta_info *sta)
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{
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struct ieee80211_sta_eht_cap *eht_cap = &sta->sta.eht_cap;
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struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
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u8 eht_ppe_size = 0;
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u8 mcs_nss_size;
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u8 eht_total_size = sizeof(eht_cap->eht_cap_elem);
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u8 *pos = (u8 *)eht_cap_ie_elem;
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memset(eht_cap, 0, sizeof(*eht_cap));
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if (!eht_cap_ie_elem ||
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!ieee80211_get_eht_iftype_cap(sband,
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ieee80211_vif_type_p2p(&sdata->vif)))
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return;
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mcs_nss_size = ieee80211_eht_mcs_nss_size(he_cap_ie_elem,
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&eht_cap_ie_elem->fixed);
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eht_total_size += mcs_nss_size;
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/* Calculate the PPE thresholds length only if the header is present */
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if (eht_cap_ie_elem->fixed.phy_cap_info[5] &
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IEEE80211_EHT_PHY_CAP5_PPE_THRESHOLD_PRESENT) {
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u16 eht_ppe_hdr;
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if (eht_cap_len < eht_total_size + sizeof(u16))
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return;
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eht_ppe_hdr = get_unaligned_le16(eht_cap_ie_elem->optional + mcs_nss_size);
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eht_ppe_size =
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ieee80211_eht_ppe_size(eht_ppe_hdr,
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eht_cap_ie_elem->fixed.phy_cap_info);
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eht_total_size += eht_ppe_size;
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/* we calculate as if NSS > 8 are valid, but don't handle that */
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if (eht_ppe_size > sizeof(eht_cap->eht_ppe_thres))
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return;
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}
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if (eht_cap_len < eht_total_size)
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return;
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/* Copy the static portion of the EHT capabilities */
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memcpy(&eht_cap->eht_cap_elem, pos, sizeof(eht_cap->eht_cap_elem));
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pos += sizeof(eht_cap->eht_cap_elem);
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/* Copy MCS/NSS which depends on the peer capabilities */
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memset(&eht_cap->eht_mcs_nss_supp, 0,
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sizeof(eht_cap->eht_mcs_nss_supp));
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memcpy(&eht_cap->eht_mcs_nss_supp, pos, mcs_nss_size);
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if (eht_ppe_size)
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memcpy(eht_cap->eht_ppe_thres,
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&eht_cap_ie_elem->optional[mcs_nss_size],
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eht_ppe_size);
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eht_cap->has_eht = true;
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sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(sta);
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sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
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}
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