drivers/net/wireless/mwifiex/ie.c

   1 /*
   2  * Marvell Wireless LAN device driver: management IE handling- setting and
   3  * deleting IE.
   4  *
   5  * Copyright (C) 2012, Marvell International Ltd.
   6  *
   7  * This software file (the "File") is distributed by Marvell International
   8  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   9  * (the "License").  You may use, redistribute and/or modify this File in
  10  * accordance with the terms and conditions of the License, a copy of which
  11  * is available by writing to the Free Software Foundation, Inc.,
  12  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  13  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  14  *
  15  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  18  * this warranty disclaimer.
  19  */
  20
  21 #include "main.h"
  22
  23 /* This function checks if current IE index is used by any on other interface.
  24  * Return: -1: yes, current IE index is used by someone else.
  25  *          0: no, current IE index is NOT used by other interface.
  26  */
  27 static int
  28 mwifiex_ie_index_used_by_other_intf(struct mwifiex_private *priv, u16 idx)
  29 {
  30         int i;
  31         struct mwifiex_adapter *adapter = priv->adapter;
  32         struct mwifiex_ie *ie;
  33
  34         for (i = 0; i < adapter->priv_num; i++) {
  35                 if (adapter->priv[i] != priv) {
  36                         ie = &adapter->priv[i]->mgmt_ie[idx];
  37                         if (ie->mgmt_subtype_mask && ie->ie_length)
  38                                 return -1;
  39                 }
  40         }
  41
  42         return 0;
  43 }
  44
  45 /* Get unused IE index. This index will be used for setting new IE */
  46 static int
  47 mwifiex_ie_get_autoidx(struct mwifiex_private *priv, u16 subtype_mask,
  48                        struct mwifiex_ie *ie, u16 *index)
  49 {
  50         u16 mask, len, i;
  51
  52         for (i = 0; i < priv->adapter->max_mgmt_ie_index; i++) {
  53                 mask = le16_to_cpu(priv->mgmt_ie[i].mgmt_subtype_mask);
  54                 len = le16_to_cpu(ie->ie_length);
  55
  56                 if (mask == MWIFIEX_AUTO_IDX_MASK)
  57                         continue;
  58
  59                 if (mask == subtype_mask) {
  60                         if (len > IEEE_MAX_IE_SIZE)
  61                                 continue;
  62
  63                         *index = i;
  64                         return 0;
  65                 }
  66
  67                 if (!priv->mgmt_ie[i].ie_length) {
  68                         if (mwifiex_ie_index_used_by_other_intf(priv, i))
  69                                 continue;
  70
  71                         *index = i;
  72                         return 0;
  73                 }
  74         }
  75
  76         return -1;
  77 }
  78
  79 /* This function prepares IE data buffer for command to be sent to FW */
  80 static int
  81 mwifiex_update_autoindex_ies(struct mwifiex_private *priv,
  82                              struct mwifiex_ie_list *ie_list)
  83 {
  84         u16 travel_len, index, mask;
  85         s16 input_len;
  86         struct mwifiex_ie *ie;
  87         u8 *tmp;
  88
  89         input_len = le16_to_cpu(ie_list->len);
  90         travel_len = sizeof(struct mwifiex_ie_types_header);
  91
  92         ie_list->len = 0;
  93
  94         while (input_len > 0) {
  95                 ie = (struct mwifiex_ie *)(((u8 *)ie_list) + travel_len);
  96                 input_len -= le16_to_cpu(ie->ie_length) + MWIFIEX_IE_HDR_SIZE;
  97                 travel_len += le16_to_cpu(ie->ie_length) + MWIFIEX_IE_HDR_SIZE;
  98
  99                 index = le16_to_cpu(ie->ie_index);
 100                 mask = le16_to_cpu(ie->mgmt_subtype_mask);
 101
 102                 if (index == MWIFIEX_AUTO_IDX_MASK) {
 103                         /* automatic addition */
 104                         if (mwifiex_ie_get_autoidx(priv, mask, ie, &index))
 105                                 return -1;
 106                         if (index == MWIFIEX_AUTO_IDX_MASK)
 107                                 return -1;
 108
 109                         tmp = (u8 *)&priv->mgmt_ie[index].ie_buffer;
 110                         memcpy(tmp, &ie->ie_buffer, le16_to_cpu(ie->ie_length));
 111                         priv->mgmt_ie[index].ie_length = ie->ie_length;
 112                         priv->mgmt_ie[index].ie_index = cpu_to_le16(index);
 113                         priv->mgmt_ie[index].mgmt_subtype_mask =
 114                                                         cpu_to_le16(mask);
 115
 116                         ie->ie_index = cpu_to_le16(index);
 117                 } else {
 118                         if (mask != MWIFIEX_DELETE_MASK)
 119                                 return -1;
 120                         /*
 121                          * Check if this index is being used on any
 122                          * other interface.
 123                          */
 124                         if (mwifiex_ie_index_used_by_other_intf(priv, index))
 125                                 return -1;
 126
 127                         ie->ie_length = 0;
 128                         memcpy(&priv->mgmt_ie[index], ie,
 129                                sizeof(struct mwifiex_ie));
 130                 }
 131
 132                 le16_add_cpu(&ie_list->len,
 133                              le16_to_cpu(priv->mgmt_ie[index].ie_length) +
 134                              MWIFIEX_IE_HDR_SIZE);
 135         }
 136
 137         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP)
 138                 return mwifiex_send_cmd_async(priv, HostCmd_CMD_UAP_SYS_CONFIG,
 139                                               HostCmd_ACT_GEN_SET,
 140                                               UAP_CUSTOM_IE_I, ie_list);
 141
 142         return 0;
 143 }
 144
 145 /* Copy individual custom IEs for beacon, probe response and assoc response
 146  * and prepare single structure for IE setting.
 147  * This function also updates allocated IE indices from driver.
 148  */
 149 static int
 150 mwifiex_update_uap_custom_ie(struct mwifiex_private *priv,
 151                              struct mwifiex_ie *beacon_ie, u16 *beacon_idx,
 152                              struct mwifiex_ie *pr_ie, u16 *probe_idx,
 153                              struct mwifiex_ie *ar_ie, u16 *assoc_idx)
 154 {
 155         struct mwifiex_ie_list *ap_custom_ie;
 156         u8 *pos;
 157         u16 len;
 158         int ret;
 159
 160         ap_custom_ie = kzalloc(sizeof(*ap_custom_ie), GFP_KERNEL);
 161         if (!ap_custom_ie)
 162                 return -ENOMEM;
 163
 164         ap_custom_ie->type = cpu_to_le16(TLV_TYPE_MGMT_IE);
 165         pos = (u8 *)ap_custom_ie->ie_list;
 166
 167         if (beacon_ie) {
 168                 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
 169                       le16_to_cpu(beacon_ie->ie_length);
 170                 memcpy(pos, beacon_ie, len);
 171                 pos += len;
 172                 le16_add_cpu(&ap_custom_ie->len, len);
 173         }
 174         if (pr_ie) {
 175                 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
 176                       le16_to_cpu(pr_ie->ie_length);
 177                 memcpy(pos, pr_ie, len);
 178                 pos += len;
 179                 le16_add_cpu(&ap_custom_ie->len, len);
 180         }
 181         if (ar_ie) {
 182                 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
 183                       le16_to_cpu(ar_ie->ie_length);
 184                 memcpy(pos, ar_ie, len);
 185                 pos += len;
 186                 le16_add_cpu(&ap_custom_ie->len, len);
 187         }
 188
 189         ret = mwifiex_update_autoindex_ies(priv, ap_custom_ie);
 190
 191         pos = (u8 *)(&ap_custom_ie->ie_list[0].ie_index);
 192         if (beacon_ie && *beacon_idx == MWIFIEX_AUTO_IDX_MASK) {
 193                 /* save beacon ie index after auto-indexing */
 194                 *beacon_idx = le16_to_cpu(ap_custom_ie->ie_list[0].ie_index);
 195                 len = sizeof(*beacon_ie) - IEEE_MAX_IE_SIZE +
 196                       le16_to_cpu(beacon_ie->ie_length);
 197                 pos += len;
 198         }
 199         if (pr_ie && le16_to_cpu(pr_ie->ie_index) == MWIFIEX_AUTO_IDX_MASK) {
 200                 /* save probe resp ie index after auto-indexing */
 201                 *probe_idx = *((u16 *)pos);
 202                 len = sizeof(*pr_ie) - IEEE_MAX_IE_SIZE +
 203                       le16_to_cpu(pr_ie->ie_length);
 204                 pos += len;
 205         }
 206         if (ar_ie && le16_to_cpu(ar_ie->ie_index) == MWIFIEX_AUTO_IDX_MASK)
 207                 /* save assoc resp ie index after auto-indexing */
 208                 *assoc_idx = *((u16 *)pos);
 209
 210         kfree(ap_custom_ie);
 211         return ret;
 212 }
 213
 214 /* This function checks if the vendor specified IE is present in passed buffer
 215  * and copies it to mwifiex_ie structure.
 216  * Function takes pointer to struct mwifiex_ie pointer as argument.
 217  * If the vendor specified IE is present then memory is allocated for
 218  * mwifiex_ie pointer and filled in with IE. Caller should take care of freeing
 219  * this memory.
 220  */
 221 static int mwifiex_update_vs_ie(const u8 *ies, int ies_len,
 222                                 struct mwifiex_ie **ie_ptr, u16 mask,
 223                                 unsigned int oui, u8 oui_type)
 224 {
 225         struct ieee_types_header *vs_ie;
 226         struct mwifiex_ie *ie = *ie_ptr;
 227         const u8 *vendor_ie;
 228
 229         vendor_ie = cfg80211_find_vendor_ie(oui, oui_type, ies, ies_len);
 230         if (vendor_ie) {
 231                 if (!*ie_ptr) {
 232                         *ie_ptr = kzalloc(sizeof(struct mwifiex_ie),
 233                                           GFP_KERNEL);
 234                         if (!*ie_ptr)
 235                                 return -ENOMEM;
 236                         ie = *ie_ptr;
 237                 }
 238
 239                 vs_ie = (struct ieee_types_header *)vendor_ie;
 240                 memcpy(ie->ie_buffer + le16_to_cpu(ie->ie_length),
 241                        vs_ie, vs_ie->len + 2);
 242                 le16_add_cpu(&ie->ie_length, vs_ie->len + 2);
 243                 ie->mgmt_subtype_mask = cpu_to_le16(mask);
 244                 ie->ie_index = cpu_to_le16(MWIFIEX_AUTO_IDX_MASK);
 245         }
 246
 247         *ie_ptr = ie;
 248         return 0;
 249 }
 250
 251 /* This function parses beacon IEs, probe response IEs, association response IEs
 252  * from cfg80211_ap_settings->beacon and sets these IE to FW.
 253  */
 254 static int mwifiex_set_mgmt_beacon_data_ies(struct mwifiex_private *priv,
 255                                             struct cfg80211_beacon_data *data)
 256 {
 257         struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL, *ar_ie = NULL;
 258         u16 beacon_idx = MWIFIEX_AUTO_IDX_MASK, pr_idx = MWIFIEX_AUTO_IDX_MASK;
 259         u16 ar_idx = MWIFIEX_AUTO_IDX_MASK;
 260         int ret = 0;
 261
 262         if (data->beacon_ies && data->beacon_ies_len) {
 263                 mwifiex_update_vs_ie(data->beacon_ies, data->beacon_ies_len,
 264                                      &beacon_ie, MGMT_MASK_BEACON,
 265                                      WLAN_OUI_MICROSOFT,
 266                                      WLAN_OUI_TYPE_MICROSOFT_WPS);
 267                 mwifiex_update_vs_ie(data->beacon_ies, data->beacon_ies_len,
 268                                      &beacon_ie, MGMT_MASK_BEACON,
 269                                      WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P);
 270         }
 271
 272         if (data->proberesp_ies && data->proberesp_ies_len) {
 273                 mwifiex_update_vs_ie(data->proberesp_ies,
 274                                      data->proberesp_ies_len, &pr_ie,
 275                                      MGMT_MASK_PROBE_RESP, WLAN_OUI_MICROSOFT,
 276                                      WLAN_OUI_TYPE_MICROSOFT_WPS);
 277                 mwifiex_update_vs_ie(data->proberesp_ies,
 278                                      data->proberesp_ies_len, &pr_ie,
 279                                      MGMT_MASK_PROBE_RESP,
 280                                      WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P);
 281         }
 282
 283         if (data->assocresp_ies && data->assocresp_ies_len) {
 284                 mwifiex_update_vs_ie(data->assocresp_ies,
 285                                      data->assocresp_ies_len, &ar_ie,
 286                                      MGMT_MASK_ASSOC_RESP |
 287                                      MGMT_MASK_REASSOC_RESP,
 288                                      WLAN_OUI_MICROSOFT,
 289                                      WLAN_OUI_TYPE_MICROSOFT_WPS);
 290                 mwifiex_update_vs_ie(data->assocresp_ies,
 291                                      data->assocresp_ies_len, &ar_ie,
 292                                      MGMT_MASK_ASSOC_RESP |
 293                                      MGMT_MASK_REASSOC_RESP, WLAN_OUI_WFA,
 294                                      WLAN_OUI_TYPE_WFA_P2P);
 295         }
 296
 297         if (beacon_ie || pr_ie || ar_ie) {
 298                 ret = mwifiex_update_uap_custom_ie(priv, beacon_ie,
 299                                                    &beacon_idx, pr_ie,
 300                                                    &pr_idx, ar_ie, &ar_idx);
 301                 if (ret)
 302                         goto done;
 303         }
 304
 305         priv->beacon_idx = beacon_idx;
 306         priv->proberesp_idx = pr_idx;
 307         priv->assocresp_idx = ar_idx;
 308
 309 done:
 310         kfree(beacon_ie);
 311         kfree(pr_ie);
 312         kfree(ar_ie);
 313
 314         return ret;
 315 }
 316
 317 /* This function parses different IEs-tail IEs, beacon IEs, probe response IEs,
 318  * association response IEs from cfg80211_ap_settings function and sets these IE
 319  * to FW.
 320  */
 321 int mwifiex_set_mgmt_ies(struct mwifiex_private *priv,
 322                          struct cfg80211_beacon_data *info)
 323 {
 324         struct mwifiex_ie *gen_ie;
 325         struct ieee_types_header *rsn_ie, *wpa_ie = NULL;
 326         u16 rsn_idx = MWIFIEX_AUTO_IDX_MASK, ie_len = 0;
 327         const u8 *vendor_ie;
 328
 329         if (info->tail && info->tail_len) {
 330                 gen_ie = kzalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 331                 if (!gen_ie)
 332                         return -ENOMEM;
 333                 gen_ie->ie_index = cpu_to_le16(rsn_idx);
 334                 gen_ie->mgmt_subtype_mask = cpu_to_le16(MGMT_MASK_BEACON |
 335                                                         MGMT_MASK_PROBE_RESP |
 336                                                         MGMT_MASK_ASSOC_RESP);
 337
 338                 rsn_ie = (void *)cfg80211_find_ie(WLAN_EID_RSN,
 339                                                   info->tail, info->tail_len);
 340                 if (rsn_ie) {
 341                         memcpy(gen_ie->ie_buffer, rsn_ie, rsn_ie->len + 2);
 342                         ie_len = rsn_ie->len + 2;
 343                         gen_ie->ie_length = cpu_to_le16(ie_len);
 344                 }
 345
 346                 vendor_ie = cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT,
 347                                                     WLAN_OUI_TYPE_MICROSOFT_WPA,
 348                                                     info->tail,
 349                                                     info->tail_len);
 350                 if (vendor_ie) {
 351                         wpa_ie = (struct ieee_types_header *)vendor_ie;
 352                         memcpy(gen_ie->ie_buffer + ie_len,
 353                                wpa_ie, wpa_ie->len + 2);
 354                         ie_len += wpa_ie->len + 2;
 355                         gen_ie->ie_length = cpu_to_le16(ie_len);
 356                 }
 357
 358                 if (rsn_ie || wpa_ie) {
 359                         if (mwifiex_update_uap_custom_ie(priv, gen_ie, &rsn_idx,
 360                                                          NULL, NULL,
 361                                                          NULL, NULL)) {
 362                                 kfree(gen_ie);
 363                                 return -1;
 364                         }
 365                         priv->rsn_idx = rsn_idx;
 366                 }
 367
 368                 kfree(gen_ie);
 369         }
 370
 371         return mwifiex_set_mgmt_beacon_data_ies(priv, info);
 372 }
 373
 374 /* This function removes management IE set */
 375 int mwifiex_del_mgmt_ies(struct mwifiex_private *priv)
 376 {
 377         struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL;
 378         struct mwifiex_ie *ar_ie = NULL, *rsn_ie = NULL;
 379         int ret = 0;
 380
 381         if (priv->rsn_idx != MWIFIEX_AUTO_IDX_MASK) {
 382                 rsn_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 383                 if (!rsn_ie)
 384                         return -ENOMEM;
 385
 386                 rsn_ie->ie_index = cpu_to_le16(priv->rsn_idx);
 387                 rsn_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 388                 rsn_ie->ie_length = 0;
 389                 if (mwifiex_update_uap_custom_ie(priv, rsn_ie, &priv->rsn_idx,
 390                                                  NULL, &priv->proberesp_idx,
 391                                                  NULL, &priv->assocresp_idx)) {
 392                         ret = -1;
 393                         goto done;
 394                 }
 395
 396                 priv->rsn_idx = MWIFIEX_AUTO_IDX_MASK;
 397         }
 398
 399         if (priv->beacon_idx != MWIFIEX_AUTO_IDX_MASK) {
 400                 beacon_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 401                 if (!beacon_ie) {
 402                         ret = -ENOMEM;
 403                         goto done;
 404                 }
 405                 beacon_ie->ie_index = cpu_to_le16(priv->beacon_idx);
 406                 beacon_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 407                 beacon_ie->ie_length = 0;
 408         }
 409         if (priv->proberesp_idx != MWIFIEX_AUTO_IDX_MASK) {
 410                 pr_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 411                 if (!pr_ie) {
 412                         ret = -ENOMEM;
 413                         goto done;
 414                 }
 415                 pr_ie->ie_index = cpu_to_le16(priv->proberesp_idx);
 416                 pr_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 417                 pr_ie->ie_length = 0;
 418         }
 419         if (priv->assocresp_idx != MWIFIEX_AUTO_IDX_MASK) {
 420                 ar_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 421                 if (!ar_ie) {
 422                         ret = -ENOMEM;
 423                         goto done;
 424                 }
 425                 ar_ie->ie_index = cpu_to_le16(priv->assocresp_idx);
 426                 ar_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 427                 ar_ie->ie_length = 0;
 428         }
 429
 430         if (beacon_ie || pr_ie || ar_ie)
 431                 ret = mwifiex_update_uap_custom_ie(priv,
 432                                                    beacon_ie, &priv->beacon_idx,
 433                                                    pr_ie, &priv->proberesp_idx,
 434                                                    ar_ie, &priv->assocresp_idx);
 435
 436 done:
 437         kfree(beacon_ie);
 438         kfree(pr_ie);
 439         kfree(ar_ie);
 440         kfree(rsn_ie);
 441
 442         return ret;
 443 }