package/mac80211/patches/310-ibss_ht.patch

   1 --- a/include/net/cfg80211.h
   2 +++ b/include/net/cfg80211.h
   3 @@ -1045,6 +1045,7 @@ struct cfg80211_ibss_params {
   4         u8 *ssid;
   5         u8 *bssid;
   6         struct ieee80211_channel *channel;
   7 +       enum nl80211_channel_type channel_type;
   8         u8 *ie;
   9         u8 ssid_len, ie_len;
  10         u16 beacon_interval;
  11 @@ -2478,6 +2479,12 @@ struct cfg80211_bss *cfg80211_get_bss(st
  12                                       const u8 *bssid,
  13                                       const u8 *ssid, size_t ssid_len,
  14                                       u16 capa_mask, u16 capa_val);
  15 +struct cfg80211_bss *cfg80211_get_bss_ht(struct wiphy *wiphy,
  16 +                                         struct ieee80211_channel *channel,
  17 +                                         const u8 *bssid,
  18 +                                         const u8 *ssid, size_t ssid_len,
  19 +                                         u16 capa_mask, u16 capa_val,
  20 +                                      enum nl80211_channel_type channel_type);
  21  static inline struct cfg80211_bss *
  22  cfg80211_get_ibss(struct wiphy *wiphy,
  23                   struct ieee80211_channel *channel,
  24 --- a/net/wireless/nl80211.c
  25 +++ b/net/wireless/nl80211.c
  26 @@ -4351,13 +4351,41 @@ static int nl80211_join_ibss(struct sk_b
  27                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  28         }
  29
  30 -       ibss.channel = ieee80211_get_channel(wiphy,
  31 -               nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
  32 +       if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
  33 +               enum nl80211_channel_type channel_type;
  34 +
  35 +               channel_type = nla_get_u32(
  36 +                       info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
  37 +               if (channel_type != NL80211_CHAN_NO_HT &&
  38 +                   channel_type != NL80211_CHAN_HT20 &&
  39 +                   channel_type != NL80211_CHAN_HT40PLUS &&
  40 +                   channel_type != NL80211_CHAN_HT40MINUS)
  41 +                       return -EINVAL;
  42 +               ibss.channel_type = channel_type;
  43 +       } else {
  44 +               ibss.channel_type = NL80211_CHAN_NO_HT;
  45 +       }
  46 +
  47 +       ibss.channel = rdev_freq_to_chan(rdev,
  48 +               nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
  49 +               ibss.channel_type);
  50         if (!ibss.channel ||
  51 +           ibss.channel->flags & IEEE80211_CHAN_PASSIVE_SCAN ||
  52             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
  53 -           ibss.channel->flags & IEEE80211_CHAN_DISABLED)
  54 +           ibss.channel->flags & IEEE80211_CHAN_RADAR)
  55                 return -EINVAL;
  56
  57 +       /* Both channels should be able to initiate communication */
  58 +       if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
  59 +            ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
  60 +           !can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
  61 +                                ibss.channel_type)) {
  62 +               printk(KERN_DEBUG
  63 +                      "cfg80211: Secondary channel not "
  64 +                      "allowed to initiate communication\n");
  65 +               return -EINVAL;
  66 +       }
  67 +
  68         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
  69         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
  70
  71 --- a/net/wireless/chan.c
  72 +++ b/net/wireless/chan.c
  73 @@ -44,7 +44,7 @@ rdev_freq_to_chan(struct cfg80211_regist
  74         return chan;
  75  }
  76
  77 -static bool can_beacon_sec_chan(struct wiphy *wiphy,
  78 +bool can_beacon_sec_chan(struct wiphy *wiphy,
  79                                 struct ieee80211_channel *chan,
  80                                 enum nl80211_channel_type channel_type)
  81  {
  82 @@ -75,6 +75,7 @@ static bool can_beacon_sec_chan(struct w
  83
  84         return true;
  85  }
  86 +EXPORT_SYMBOL(can_beacon_sec_chan);
  87
  88  int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
  89                       struct wireless_dev *wdev, int freq,
  90 --- a/net/wireless/core.h
  91 +++ b/net/wireless/core.h
  92 @@ -441,6 +441,9 @@ cfg80211_can_add_interface(struct cfg802
  93  struct ieee80211_channel *
  94  rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
  95                   int freq, enum nl80211_channel_type channel_type);
  96 +bool can_beacon_sec_chan(struct wiphy *wiphy,
  97 +                               struct ieee80211_channel *chan,
  98 +                               enum nl80211_channel_type channel_type);
  99  int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
 100                       struct wireless_dev *wdev, int freq,
 101                       enum nl80211_channel_type channel_type);
 102 --- a/net/wireless/scan.c
 103 +++ b/net/wireless/scan.c
 104 @@ -365,6 +365,19 @@ struct cfg80211_bss *cfg80211_get_bss(st
 105                                       const u8 *ssid, size_t ssid_len,
 106                                       u16 capa_mask, u16 capa_val)
 107  {
 108 +       /* call HT version with no HT requirements */
 109 +       return cfg80211_get_bss_ht(wiphy, channel, bssid, ssid, ssid_len,
 110 +                                  capa_mask, capa_val, NL80211_CHAN_NO_HT);
 111 +}
 112 +EXPORT_SYMBOL(cfg80211_get_bss);
 113 +
 114 +struct cfg80211_bss *cfg80211_get_bss_ht(struct wiphy *wiphy,
 115 +                                     struct ieee80211_channel *channel,
 116 +                                     const u8 *bssid,
 117 +                                     const u8 *ssid, size_t ssid_len,
 118 +                                     u16 capa_mask, u16 capa_val,
 119 +                                     enum nl80211_channel_type require_ht)
 120 +{
 121         struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy);
 122         struct cfg80211_internal_bss *bss, *res = NULL;
 123         unsigned long now = jiffies;
 124 @@ -374,8 +387,26 @@ struct cfg80211_bss *cfg80211_get_bss(st
 125         list_for_each_entry(bss, &dev->bss_list, list) {
 126                 if ((bss->pub.capability & capa_mask) != capa_val)
 127                         continue;
 128 -               if (channel && bss->pub.channel != channel)
 129 -                       continue;
 130 +               if (channel) {
 131 +                       if (bss->pub.channel != channel)
 132 +                               continue;
 133 +                       if (require_ht != NL80211_CHAN_NO_HT) {
 134 +                               struct ieee80211_ht_info *ht_info;
 135 +                               ht_info = (struct ieee80211_ht_info *)
 136 +                                       ieee80211_bss_get_ie(&bss->pub,
 137 +                                                      WLAN_EID_HT_INFORMATION);
 138 +                               if (!ht_info)
 139 +                                       continue;
 140 +                               if (require_ht == NL80211_CHAN_HT40MINUS &&
 141 +                                             !(ht_info->ht_param &
 142 +                                             IEEE80211_HT_PARAM_CHA_SEC_BELOW))
 143 +                                       continue;
 144 +                               if (require_ht == NL80211_CHAN_HT40PLUS &&
 145 +                                             !(ht_info->ht_param &
 146 +                                             IEEE80211_HT_PARAM_CHA_SEC_ABOVE))
 147 +                                       continue;
 148 +                       }
 149 +               }
 150                 /* Don't get expired BSS structs */
 151                 if (time_after(now, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE) &&
 152                     !atomic_read(&bss->hold))
 153 @@ -392,7 +423,7 @@ struct cfg80211_bss *cfg80211_get_bss(st
 154                 return NULL;
 155         return &res->pub;
 156  }
 157 -EXPORT_SYMBOL(cfg80211_get_bss);
 158 +EXPORT_SYMBOL(cfg80211_get_bss_ht);
 159
 160  struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy,
 161                                        struct ieee80211_channel *channel,
 162 --- a/net/mac80211/ieee80211_i.h
 163 +++ b/net/mac80211/ieee80211_i.h
 164 @@ -464,6 +464,7 @@ struct ieee80211_if_ibss {
 165         u8 ssid_len, ie_len;
 166         u8 *ie;
 167         struct ieee80211_channel *channel;
 168 +       enum nl80211_channel_type channel_type;
 169
 170         unsigned long ibss_join_req;
 171         /* probe response/beacon for IBSS */
 172 @@ -1151,6 +1152,7 @@ void ieee80211_ibss_notify_scan_complete
 173  void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
 174  struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 175                                         u8 *bssid, u8 *addr, u32 supp_rates,
 176 +                                       struct ieee80211_ht_cap *ht_cap,
 177                                         gfp_t gfp);
 178  int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 179                         struct cfg80211_ibss_params *params);
 180 @@ -1405,6 +1407,12 @@ void ieee80211_recalc_smps(struct ieee80
 181  size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
 182                           const u8 *ids, int n_ids, size_t offset);
 183  size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
 184 +u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_supported_band *sband,
 185 +                              u16 cap);
 186 +u8 *ieee80211_ie_build_ht_info(u8 *pos,
 187 +                               struct ieee80211_sta_ht_cap *ht_cap,
 188 +                               struct ieee80211_channel *channel,
 189 +                               enum nl80211_channel_type channel_type);
 190
 191  /* internal work items */
 192  void ieee80211_work_init(struct ieee80211_local *local);
 193 @@ -1433,6 +1441,8 @@ ieee80211_get_channel_mode(struct ieee80
 194  bool ieee80211_set_channel_type(struct ieee80211_local *local,
 195                                 struct ieee80211_sub_if_data *sdata,
 196                                 enum nl80211_channel_type chantype);
 197 +enum nl80211_channel_type ieee80211_ht_info_to_channel_type(
 198 +                                       struct ieee80211_ht_info *ht_info);
 199
 200  #ifdef CONFIG_MAC80211_NOINLINE
 201  #define debug_noinline noinline
 202 --- a/net/mac80211/util.c
 203 +++ b/net/mac80211/util.c
 204 @@ -1008,23 +1008,8 @@ int ieee80211_build_preq_ies(struct ieee
 205                 offset = noffset;
 206         }
 207
 208 -       if (sband->ht_cap.ht_supported) {
 209 -               u16 cap = sband->ht_cap.cap;
 210 -               __le16 tmp;
 211 -
 212 -               *pos++ = WLAN_EID_HT_CAPABILITY;
 213 -               *pos++ = sizeof(struct ieee80211_ht_cap);
 214 -               memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 215 -               tmp = cpu_to_le16(cap);
 216 -               memcpy(pos, &tmp, sizeof(u16));
 217 -               pos += sizeof(u16);
 218 -               *pos++ = sband->ht_cap.ampdu_factor |
 219 -                        (sband->ht_cap.ampdu_density <<
 220 -                               IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
 221 -               memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
 222 -               pos += sizeof(sband->ht_cap.mcs);
 223 -               pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
 224 -       }
 225 +       if (sband->ht_cap.ht_supported)
 226 +               pos = ieee80211_ie_build_ht_cap(pos, sband, sband->ht_cap.cap);
 227
 228         /*
 229          * If adding more here, adjust code in main.c
 230 @@ -1548,3 +1533,100 @@ void ieee80211_disable_rssi_reports(stru
 231         _ieee80211_enable_rssi_reports(sdata, 0, 0);
 232  }
 233  EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
 234 +
 235 +u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_supported_band *sband,
 236 +                              u16 cap)
 237 +{
 238 +       __le16 tmp;
 239 +
 240 +       *pos++ = WLAN_EID_HT_CAPABILITY;
 241 +       *pos++ = sizeof(struct ieee80211_ht_cap);
 242 +       memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 243 +
 244 +       /* capability flags */
 245 +       tmp = cpu_to_le16(cap);
 246 +       memcpy(pos, &tmp, sizeof(u16));
 247 +       pos += sizeof(u16);
 248 +
 249 +       /* AMPDU parameters */
 250 +       *pos++ = sband->ht_cap.ampdu_factor |
 251 +                (sband->ht_cap.ampdu_density <<
 252 +                       IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
 253 +
 254 +       /* MCS set */
 255 +       memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
 256 +       pos += sizeof(sband->ht_cap.mcs);
 257 +
 258 +       /* extended capabilities */
 259 +       pos += sizeof(__le16);
 260 +
 261 +       /* BF capabilities */
 262 +       pos += sizeof(__le32);
 263 +
 264 +       /* antenna selection */
 265 +       pos += sizeof(u8);
 266 +
 267 +       return pos;
 268 +}
 269 +
 270 +u8 *ieee80211_ie_build_ht_info(u8 *pos,
 271 +                               struct ieee80211_sta_ht_cap *ht_cap,
 272 +                               struct ieee80211_channel *channel,
 273 +                               enum nl80211_channel_type channel_type)
 274 +{
 275 +       struct ieee80211_ht_info *ht_info;
 276 +       /* Build HT Information */
 277 +       *pos++ = WLAN_EID_HT_INFORMATION;
 278 +       *pos++ = sizeof(struct ieee80211_ht_info);
 279 +       ht_info = (struct ieee80211_ht_info *)pos;
 280 +       ht_info->control_chan =
 281 +                       ieee80211_frequency_to_channel(channel->center_freq);
 282 +       switch (channel_type) {
 283 +       case NL80211_CHAN_HT40MINUS:
 284 +               ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 285 +               break;
 286 +       case NL80211_CHAN_HT40PLUS:
 287 +               ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 288 +               break;
 289 +       case NL80211_CHAN_HT20:
 290 +       default:
 291 +               ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 292 +               break;
 293 +       }
 294 +       if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
 295 +               ht_info->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
 296 +       ht_info->operation_mode = 0x0000;
 297 +       ht_info->stbc_param = 0x0000;
 298 +
 299 +       /* It seems that Basic MCS set and Supported MCS set
 300 +          are identical for the first 10 bytes */
 301 +       memset(&ht_info->basic_set, 0, 16);
 302 +       memcpy(&ht_info->basic_set, &ht_cap->mcs, 10);
 303 +
 304 +       return pos + sizeof(struct ieee80211_ht_info);
 305 +}
 306 +
 307 +enum nl80211_channel_type ieee80211_ht_info_to_channel_type(
 308 +                                       struct ieee80211_ht_info *ht_info)
 309 +{
 310 +       enum nl80211_channel_type channel_type;
 311 +
 312 +       if (!ht_info)
 313 +               return NL80211_CHAN_NO_HT;
 314 +
 315 +       switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 316 +       case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 317 +               channel_type = NL80211_CHAN_HT20;
 318 +               break;
 319 +       case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 320 +               channel_type = NL80211_CHAN_HT40PLUS;
 321 +               break;
 322 +       case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 323 +               channel_type = NL80211_CHAN_HT40MINUS;
 324 +               break;
 325 +       default:
 326 +               channel_type = NL80211_CHAN_NO_HT;
 327 +       }
 328 +
 329 +       return channel_type;
 330 +}
 331 --- a/net/mac80211/work.c
 332 +++ b/net/mac80211/work.c
 333 @@ -118,7 +118,6 @@ static void ieee80211_add_ht_ie(struct s
 334         u8 *pos;
 335         u32 flags = channel->flags;
 336         u16 cap = sband->ht_cap.cap;
 337 -       __le16 tmp;
 338
 339         if (!sband->ht_cap.ht_supported)
 340                 return;
 341 @@ -169,34 +168,8 @@ static void ieee80211_add_ht_ie(struct s
 342         }
 343
 344         /* reserve and fill IE */
 345 -
 346         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 347 -       *pos++ = WLAN_EID_HT_CAPABILITY;
 348 -       *pos++ = sizeof(struct ieee80211_ht_cap);
 349 -       memset(pos, 0, sizeof(struct ieee80211_ht_cap));
 350 -
 351 -       /* capability flags */
 352 -       tmp = cpu_to_le16(cap);
 353 -       memcpy(pos, &tmp, sizeof(u16));
 354 -       pos += sizeof(u16);
 355 -
 356 -       /* AMPDU parameters */
 357 -       *pos++ = sband->ht_cap.ampdu_factor |
 358 -                (sband->ht_cap.ampdu_density <<
 359 -                       IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
 360 -
 361 -       /* MCS set */
 362 -       memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
 363 -       pos += sizeof(sband->ht_cap.mcs);
 364 -
 365 -       /* extended capabilities */
 366 -       pos += sizeof(__le16);
 367 -
 368 -       /* BF capabilities */
 369 -       pos += sizeof(__le32);
 370 -
 371 -       /* antenna selection */
 372 -       pos += sizeof(u8);
 373 +       ieee80211_ie_build_ht_cap(pos, sband, cap);
 374  }
 375
 376  static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
 377 --- a/net/mac80211/agg-tx.c
 378 +++ b/net/mac80211/agg-tx.c
 379 @@ -84,6 +84,8 @@ static void ieee80211_send_addba_request
 380                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
 381         else if (sdata->vif.type == NL80211_IFTYPE_STATION)
 382                 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
 383 +       else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
 384 +               memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
 385
 386         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 387                                           IEEE80211_STYPE_ACTION);
 388 @@ -400,7 +402,8 @@ int ieee80211_start_tx_ba_session(struct
 389         if (sdata->vif.type != NL80211_IFTYPE_STATION &&
 390             sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 391             sdata->vif.type != NL80211_IFTYPE_AP &&
 392 -           sdata->vif.type != NL80211_IFTYPE_WDS)
 393 +           sdata->vif.type != NL80211_IFTYPE_WDS &&
 394 +           sdata->vif.type != NL80211_IFTYPE_ADHOC)
 395                 return -EINVAL;
 396
 397         if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) {
 398 --- a/net/mac80211/ht.c
 399 +++ b/net/mac80211/ht.c
 400 @@ -203,6 +203,8 @@ void ieee80211_send_delba(struct ieee802
 401                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
 402         else if (sdata->vif.type == NL80211_IFTYPE_STATION)
 403                 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
 404 +       else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
 405 +               memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
 406
 407         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 408                                           IEEE80211_STYPE_ACTION);
 409 --- a/net/mac80211/ibss.c
 410 +++ b/net/mac80211/ibss.c
 411 @@ -35,6 +35,76 @@
 412
 413  #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
 414
 415 +static bool ieee80211_can_use_ext_chan(struct ieee80211_sub_if_data *sdata,
 416 +                                      struct ieee80211_channel *channel,
 417 +                                      enum nl80211_channel_type channel_type)
 418 +{
 419 +       /* check if we are legally allowed to use HT extension channel */
 420 +       if ((channel_type == NL80211_CHAN_HT40PLUS) ||
 421 +                       (channel_type == NL80211_CHAN_HT40MINUS)) {
 422 +               int sec_freq = channel->center_freq +
 423 +                            (channel_type == NL80211_CHAN_HT40PLUS ? 20 : -20);
 424 +               struct ieee80211_channel *sec_chan =
 425 +                            ieee80211_get_channel(sdata->wdev.wiphy, sec_freq);
 426 +               if (!sec_chan || sec_chan->flags & (IEEE80211_CHAN_DISABLED |
 427 +                                          IEEE80211_CHAN_PASSIVE_SCAN |
 428 +                                          IEEE80211_CHAN_NO_IBSS |
 429 +                                          IEEE80211_CHAN_RADAR)) {
 430 +                       return false;
 431 +               }
 432 +       }
 433 +       return true;
 434 +}
 435 +
 436 +static void ieee80211_update_ht_elems(struct ieee80211_sub_if_data *sdata,
 437 +                                     struct ieee80211_mgmt *mgmt,
 438 +                                     struct ieee80211_ht_info *ht_info)
 439 +{
 440 +       struct ieee80211_local *local = sdata->local;
 441 +       struct ieee80211_supported_band *sband =
 442 +                       local->hw.wiphy->bands[local->oper_channel->band];
 443 +       enum nl80211_channel_type channel_type =
 444 +                       ieee80211_ht_info_to_channel_type(ht_info);
 445 +
 446 +       if (!ieee80211_can_use_ext_chan(sdata, local->oper_channel, channel_type))
 447 +               channel_type = NL80211_CHAN_HT20;
 448 +
 449 +       if (channel_type != local->_oper_channel_type) {
 450 +               struct sk_buff *skb = rcu_dereference_protected(
 451 +                               sdata->u.ibss.presp,
 452 +                               lockdep_is_held(&ifibss->mtx));
 453 +               struct sk_buff *nskb;
 454 +               u8 *ht_ie;
 455 +
 456 +               /* update HT IE. If not yet existing, create one */
 457 +               nskb = skb_copy(skb, GFP_ATOMIC);
 458 +               ht_ie = (u8 *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY,
 459 +                                              (const u8 *)(nskb->data + 24 +
 460 +                                                       sizeof(mgmt->u.beacon)),
 461 +                                              nskb->len - 24 -
 462 +                                                       sizeof(mgmt->u.beacon));
 463 +               if (!ht_ie)
 464 +                       ht_ie = skb_put(nskb, 4 +
 465 +                                             sizeof(struct ieee80211_ht_cap) +
 466 +                                             sizeof(struct ieee80211_ht_info));
 467 +
 468 +               ht_ie = ieee80211_ie_build_ht_cap(ht_ie, sband,
 469 +                                                 sband->ht_cap.cap);
 470 +               ht_ie = ieee80211_ie_build_ht_info(ht_ie, &sband->ht_cap,
 471 +                                            local->oper_channel, channel_type);
 472 +               rcu_assign_pointer(sdata->u.ibss.presp, nskb);
 473 +               kfree_skb(skb);
 474 +
 475 +               if(!ieee80211_set_channel_type(local, sdata, channel_type)) {
 476 +                       channel_type = NL80211_CHAN_HT20;
 477 +                       WARN_ON(!ieee80211_set_channel_type(local, sdata,
 478 +                                                           channel_type));
 479 +               }
 480 +
 481 +               ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
 482 +       }
 483 +
 484 +}
 485
 486  static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata,
 487                                         struct ieee80211_mgmt *mgmt,
 488 @@ -64,6 +134,7 @@ static void ieee80211_rx_mgmt_auth_ibss(
 489  static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 490                                       const u8 *bssid, const int beacon_int,
 491                                       struct ieee80211_channel *chan,
 492 +                                     enum nl80211_channel_type channel_type,
 493                                       const u32 basic_rates,
 494                                       const u16 capability, u64 tsf)
 495  {
 496 @@ -104,8 +175,17 @@ static void __ieee80211_sta_join_ibss(st
 497
 498         sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0;
 499
 500 +       /* entering a legacy IBSS. Use given HT configuration. */
 501 +       if (channel_type == NL80211_CHAN_NO_HT)
 502 +               channel_type = ifibss->channel_type;
 503         local->oper_channel = chan;
 504 -       WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
 505 +
 506 +       /* if phy is on a different extension channel, setting ht40 will fail */
 507 +       if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
 508 +               channel_type = NL80211_CHAN_HT20;
 509 +               WARN_ON(!ieee80211_set_channel_type(local, sdata,
 510 +                                                                channel_type));
 511 +       }
 512         ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
 513
 514         sband = local->hw.wiphy->bands[chan->band];
 515 @@ -171,6 +251,18 @@ static void __ieee80211_sta_join_ibss(st
 516                 memcpy(skb_put(skb, ifibss->ie_len),
 517                        ifibss->ie, ifibss->ie_len);
 518
 519 +       /* add HT capability and information IEs */
 520 +       if (channel_type != NL80211_CHAN_NO_HT && sband->ht_cap.ht_supported) {
 521 +               pos = skb_put(skb, 4 +
 522 +                                  sizeof(struct ieee80211_ht_cap) +
 523 +                                  sizeof(struct ieee80211_ht_info));
 524 +               pos = ieee80211_ie_build_ht_cap(pos, sband, sband->ht_cap.cap);
 525 +               pos = ieee80211_ie_build_ht_info(pos,
 526 +                                                &sband->ht_cap,
 527 +                                                chan,
 528 +                                                channel_type);
 529 +       }
 530 +
 531         if (local->hw.queues >= 4) {
 532                 pos = skb_put(skb, 9);
 533                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 534 @@ -219,6 +311,8 @@ static void ieee80211_sta_join_ibss(stru
 535         u32 basic_rates;
 536         int i, j;
 537         u16 beacon_int = cbss->beacon_interval;
 538 +       const u8 *ht_info_ie;
 539 +       enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 540
 541         lockdep_assert_held(&sdata->u.ibss.mtx);
 542
 543 @@ -242,9 +336,23 @@ static void ieee80211_sta_join_ibss(stru
 544                 }
 545         }
 546
 547 +       ht_info_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_INFORMATION);
 548 +       if (ht_info_ie)
 549 +               channel_type = ieee80211_ht_info_to_channel_type(
 550 +                       (struct ieee80211_ht_info *) (ht_info_ie + 2));
 551 +
 552 +       if (!ieee80211_can_use_ext_chan(sdata, cbss->channel, channel_type)) {
 553 +               channel_type = NL80211_CHAN_HT20;
 554 +#ifdef CONFIG_MAC80211_IBSS_DEBUG
 555 +               printk(KERN_DEBUG "%s: IBSS not allowed on secondary channel\n",
 556 +                      sdata->name);
 557 +#endif
 558 +       }
 559 +
 560         __ieee80211_sta_join_ibss(sdata, cbss->bssid,
 561                                   beacon_int,
 562                                   cbss->channel,
 563 +                                 channel_type,
 564                                   basic_rates,
 565                                   cbss->capability,
 566                                   cbss->tsf);
 567 @@ -310,11 +418,24 @@ static void ieee80211_rx_bss_info(struct
 568                         } else
 569                                 sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid,
 570                                                 mgmt->sa, supp_rates,
 571 -                                               GFP_ATOMIC);
 572 +                                               elems->ht_cap_elem, GFP_ATOMIC);
 573                 }
 574
 575 -               if (sta && elems->wmm_info)
 576 -                       set_sta_flags(sta, WLAN_STA_WME);
 577 +               if (sta) {
 578 +                       if (elems->wmm_info)
 579 +                               set_sta_flags(sta, WLAN_STA_WME);
 580 +
 581 +                       /* remote station uses ht */
 582 +                       if (elems->ht_info_elem) {
 583 +                               ieee80211_update_ht_elems(sdata, mgmt,
 584 +                                                         elems->ht_info_elem);
 585 +                               ieee80211_ht_cap_ie_to_sta_ht_cap(
 586 +                                               local->hw.wiphy->bands[
 587 +                                                    local->oper_channel->band],
 588 +                                               elems->ht_cap_elem,
 589 +                                               &sta->sta.ht_cap);
 590 +                       }
 591 +               }
 592
 593                 rcu_read_unlock();
 594         }
 595 @@ -404,7 +525,7 @@ static void ieee80211_rx_bss_info(struct
 596                 ieee80211_sta_join_ibss(sdata, bss);
 597                 supp_rates = ieee80211_sta_get_rates(local, elems, band);
 598                 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa,
 599 -                                      supp_rates, GFP_KERNEL);
 600 +                                   supp_rates, elems->ht_cap_elem, GFP_KERNEL);
 601         }
 602
 603   put_bss:
 604 @@ -417,7 +538,8 @@ static void ieee80211_rx_bss_info(struct
 605   * must be callable in atomic context.
 606   */
 607  struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 608 -                                       u8 *bssid,u8 *addr, u32 supp_rates,
 609 +                                       u8 *bssid, u8 *addr, u32 supp_rates,
 610 +                                       struct ieee80211_ht_cap *ht_cap,
 611                                         gfp_t gfp)
 612  {
 613         struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
 614 @@ -458,6 +580,11 @@ struct sta_info *ieee80211_ibss_add_sta(
 615         sta->sta.supp_rates[band] = supp_rates |
 616                         ieee80211_mandatory_rates(local, band);
 617
 618 +       /* fill in ht rates */
 619 +       if (ht_cap)
 620 +               ieee80211_ht_cap_ie_to_sta_ht_cap(local->hw.wiphy->bands[band],
 621 +                               ht_cap, &sta->sta.ht_cap);
 622 +
 623         rate_control_rate_init(sta);
 624
 625         /* If it fails, maybe we raced another insertion? */
 626 @@ -556,8 +683,8 @@ static void ieee80211_sta_create_ibss(st
 627                 sdata->drop_unencrypted = 0;
 628
 629         __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int,
 630 -                                 ifibss->channel, ifibss->basic_rates,
 631 -                                 capability, 0);
 632 +                                 ifibss->channel, ifibss->channel_type,
 633 +                                 ifibss->basic_rates, capability, 0);
 634  }
 635
 636  /*
 637 @@ -594,10 +721,10 @@ static void ieee80211_sta_find_ibss(stru
 638                 chan = ifibss->channel;
 639         if (!is_zero_ether_addr(ifibss->bssid))
 640                 bssid = ifibss->bssid;
 641 -       cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid,
 642 +       cbss = cfg80211_get_bss_ht(local->hw.wiphy, chan, bssid,
 643                                 ifibss->ssid, ifibss->ssid_len,
 644                                 WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY,
 645 -                               capability);
 646 +                               capability, ifibss->channel_type);
 647
 648         if (cbss) {
 649                 struct ieee80211_bss *bss;
 650 @@ -896,10 +1023,15 @@ int ieee80211_ibss_join(struct ieee80211
 651         struct sk_buff *skb;
 652
 653         skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom +
 654 -                           36 /* bitrates */ +
 655 -                           34 /* SSID */ +
 656 -                           3  /* DS params */ +
 657 -                           4  /* IBSS params */ +
 658 +                           sizeof(struct ieee80211_hdr_3addr) +
 659 +                           12 /* struct ieee80211_mgmt.u.beacon */ +
 660 +                           2 + IEEE80211_MAX_SSID_LEN /* max SSID */ +
 661 +                           2 + 8 /* max Supported Rates */ +
 662 +                           3 /* max DS params */ +
 663 +                           4 /* IBSS params */ +
 664 +                           2 + (IEEE80211_MAX_SUPP_RATES - 8) +
 665 +                           2 + sizeof(struct ieee80211_ht_cap) +
 666 +                           2 + sizeof(struct ieee80211_ht_info) +
 667                             params->ie_len);
 668         if (!skb)
 669                 return -ENOMEM;
 670 @@ -920,13 +1052,15 @@ int ieee80211_ibss_join(struct ieee80211
 671         sdata->vif.bss_conf.beacon_int = params->beacon_interval;
 672
 673         sdata->u.ibss.channel = params->channel;
 674 +       sdata->u.ibss.channel_type = params->channel_type;
 675         sdata->u.ibss.fixed_channel = params->channel_fixed;
 676
 677         /* fix ourselves to that channel now already */
 678         if (params->channel_fixed) {
 679                 sdata->local->oper_channel = params->channel;
 680 -               WARN_ON(!ieee80211_set_channel_type(sdata->local, sdata,
 681 -                                                   NL80211_CHAN_NO_HT));
 682 +               if(!ieee80211_set_channel_type(sdata->local, sdata,
 683 +                                              params->channel_type))
 684 +                       return -EINVAL;
 685         }
 686
 687         if (params->ie) {
 688 --- a/net/mac80211/rx.c
 689 +++ b/net/mac80211/rx.c
 690 @@ -2148,7 +2148,8 @@ ieee80211_rx_h_action(struct ieee80211_r
 691                 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
 692                     sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 693                     sdata->vif.type != NL80211_IFTYPE_AP &&
 694 -                   sdata->vif.type != NL80211_IFTYPE_WDS)
 695 +                   sdata->vif.type != NL80211_IFTYPE_WDS &&
 696 +                   sdata->vif.type != NL80211_IFTYPE_ADHOC)
 697                         break;
 698
 699                 /* verify action_code is present */
 700 @@ -2666,7 +2667,8 @@ static int prepare_for_handlers(struct i
 701                         else
 702                                 rate_idx = status->rate_idx;
 703                         rx->sta = ieee80211_ibss_add_sta(sdata, bssid,
 704 -                                       hdr->addr2, BIT(rate_idx), GFP_ATOMIC);
 705 +                                       hdr->addr2, BIT(rate_idx), NULL,
 706 +                                                               GFP_ATOMIC);
 707                 }
 708                 break;
 709         case NL80211_IFTYPE_MESH_POINT:
 710 --- a/net/mac80211/agg-rx.c
 711 +++ b/net/mac80211/agg-rx.c
 712 @@ -186,6 +186,8 @@ static void ieee80211_send_addba_resp(st
 713                 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
 714         else if (sdata->vif.type == NL80211_IFTYPE_WDS)
 715                 memcpy(mgmt->bssid, da, ETH_ALEN);
 716 +       else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
 717 +               memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
 718
 719         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 720                                           IEEE80211_STYPE_ACTION);