net/mac80211/he.c

   1 /*
   2  * HE handling
   3  *
   4  * Copyright(c) 2017 Intel Deutschland GmbH
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include "ieee80211_i.h"
  12
  13 void
  14 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
  15                                   struct ieee80211_supported_band *sband,
  16                                   const u8 *he_cap_ie, u8 he_cap_len,
  17                                   struct sta_info *sta)
  18 {
  19         struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
  20         struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
  21         u8 he_ppe_size;
  22         u8 mcs_nss_size;
  23         u8 he_total_size;
  24
  25         memset(he_cap, 0, sizeof(*he_cap));
  26
  27         if (!he_cap_ie || !ieee80211_get_he_sta_cap(sband))
  28                 return;
  29
  30         /* Make sure size is OK */
  31         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
  32         he_ppe_size =
  33                 ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
  34                                                 mcs_nss_size],
  35                                       he_cap_ie_elem->phy_cap_info);
  36         he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
  37                         he_ppe_size;
  38         if (he_cap_len < he_total_size)
  39                 return;
  40
  41         memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
  42
  43         /* HE Tx/Rx HE MCS NSS Support Field */
  44         memcpy(&he_cap->he_mcs_nss_supp,
  45                &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
  46
  47         /* Check if there are (optional) PPE Thresholds */
  48         if (he_cap->he_cap_elem.phy_cap_info[6] &
  49             IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
  50                 memcpy(he_cap->ppe_thres,
  51                        &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
  52                        he_ppe_size);
  53
  54         he_cap->has_he = true;
  55 }