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) 2012-2014, 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, tlv_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 >= sizeof(struct mwifiex_ie_types_header)) {
  95                 ie = (struct mwifiex_ie *)(((u8 *)ie_list) + travel_len);
  96                 tlv_len = le16_to_cpu(ie->ie_length);
  97                 travel_len += tlv_len + MWIFIEX_IE_HDR_SIZE;
  98
  99                 if (input_len < tlv_len + MWIFIEX_IE_HDR_SIZE)
 100                         return -1;
 101                 index = le16_to_cpu(ie->ie_index);
 102                 mask = le16_to_cpu(ie->mgmt_subtype_mask);
 103
 104                 if (index == MWIFIEX_AUTO_IDX_MASK) {
 105                         /* automatic addition */
 106                         if (mwifiex_ie_get_autoidx(priv, mask, ie, &index))
 107                                 return -1;
 108                         if (index == MWIFIEX_AUTO_IDX_MASK)
 109                                 return -1;
 110
 111                         tmp = (u8 *)&priv->mgmt_ie[index].ie_buffer;
 112                         memcpy(tmp, &ie->ie_buffer, le16_to_cpu(ie->ie_length));
 113                         priv->mgmt_ie[index].ie_length = ie->ie_length;
 114                         priv->mgmt_ie[index].ie_index = cpu_to_le16(index);
 115                         priv->mgmt_ie[index].mgmt_subtype_mask =
 116                                                         cpu_to_le16(mask);
 117
 118                         ie->ie_index = cpu_to_le16(index);
 119                 } else {
 120                         if (mask != MWIFIEX_DELETE_MASK)
 121                                 return -1;
 122                         /*
 123                          * Check if this index is being used on any
 124                          * other interface.
 125                          */
 126                         if (mwifiex_ie_index_used_by_other_intf(priv, index))
 127                                 return -1;
 128
 129                         ie->ie_length = 0;
 130                         memcpy(&priv->mgmt_ie[index], ie,
 131                                sizeof(struct mwifiex_ie));
 132                 }
 133
 134                 le16_add_cpu(&ie_list->len,
 135                              le16_to_cpu(priv->mgmt_ie[index].ie_length) +
 136                              MWIFIEX_IE_HDR_SIZE);
 137                 input_len -= tlv_len + MWIFIEX_IE_HDR_SIZE;
 138         }
 139
 140         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP)
 141                 return mwifiex_send_cmd(priv, HostCmd_CMD_UAP_SYS_CONFIG,
 142                                         HostCmd_ACT_GEN_SET,
 143                                         UAP_CUSTOM_IE_I, ie_list, false);
 144
 145         return 0;
 146 }
 147
 148 /* Copy individual custom IEs for beacon, probe response and assoc response
 149  * and prepare single structure for IE setting.
 150  * This function also updates allocated IE indices from driver.
 151  */
 152 static int
 153 mwifiex_update_uap_custom_ie(struct mwifiex_private *priv,
 154                              struct mwifiex_ie *beacon_ie, u16 *beacon_idx,
 155                              struct mwifiex_ie *pr_ie, u16 *probe_idx,
 156                              struct mwifiex_ie *ar_ie, u16 *assoc_idx)
 157 {
 158         struct mwifiex_ie_list *ap_custom_ie;
 159         u8 *pos;
 160         u16 len;
 161         int ret;
 162
 163         ap_custom_ie = kzalloc(sizeof(*ap_custom_ie), GFP_KERNEL);
 164         if (!ap_custom_ie)
 165                 return -ENOMEM;
 166
 167         ap_custom_ie->type = cpu_to_le16(TLV_TYPE_MGMT_IE);
 168         pos = (u8 *)ap_custom_ie->ie_list;
 169
 170         if (beacon_ie) {
 171                 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
 172                       le16_to_cpu(beacon_ie->ie_length);
 173                 memcpy(pos, beacon_ie, len);
 174                 pos += len;
 175                 le16_add_cpu(&ap_custom_ie->len, len);
 176         }
 177         if (pr_ie) {
 178                 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
 179                       le16_to_cpu(pr_ie->ie_length);
 180                 memcpy(pos, pr_ie, len);
 181                 pos += len;
 182                 le16_add_cpu(&ap_custom_ie->len, len);
 183         }
 184         if (ar_ie) {
 185                 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
 186                       le16_to_cpu(ar_ie->ie_length);
 187                 memcpy(pos, ar_ie, len);
 188                 pos += len;
 189                 le16_add_cpu(&ap_custom_ie->len, len);
 190         }
 191
 192         ret = mwifiex_update_autoindex_ies(priv, ap_custom_ie);
 193
 194         pos = (u8 *)(&ap_custom_ie->ie_list[0].ie_index);
 195         if (beacon_ie && *beacon_idx == MWIFIEX_AUTO_IDX_MASK) {
 196                 /* save beacon ie index after auto-indexing */
 197                 *beacon_idx = le16_to_cpu(ap_custom_ie->ie_list[0].ie_index);
 198                 len = sizeof(*beacon_ie) - IEEE_MAX_IE_SIZE +
 199                       le16_to_cpu(beacon_ie->ie_length);
 200                 pos += len;
 201         }
 202         if (pr_ie && le16_to_cpu(pr_ie->ie_index) == MWIFIEX_AUTO_IDX_MASK) {
 203                 /* save probe resp ie index after auto-indexing */
 204                 *probe_idx = *((u16 *)pos);
 205                 len = sizeof(*pr_ie) - IEEE_MAX_IE_SIZE +
 206                       le16_to_cpu(pr_ie->ie_length);
 207                 pos += len;
 208         }
 209         if (ar_ie && le16_to_cpu(ar_ie->ie_index) == MWIFIEX_AUTO_IDX_MASK)
 210                 /* save assoc resp ie index after auto-indexing */
 211                 *assoc_idx = *((u16 *)pos);
 212
 213         kfree(ap_custom_ie);
 214         return ret;
 215 }
 216
 217 /* This function checks if the vendor specified IE is present in passed buffer
 218  * and copies it to mwifiex_ie structure.
 219  * Function takes pointer to struct mwifiex_ie pointer as argument.
 220  * If the vendor specified IE is present then memory is allocated for
 221  * mwifiex_ie pointer and filled in with IE. Caller should take care of freeing
 222  * this memory.
 223  */
 224 static int mwifiex_update_vs_ie(const u8 *ies, int ies_len,
 225                                 struct mwifiex_ie **ie_ptr, u16 mask,
 226                                 unsigned int oui, u8 oui_type)
 227 {
 228         struct ieee_types_header *vs_ie;
 229         struct mwifiex_ie *ie = *ie_ptr;
 230         const u8 *vendor_ie;
 231
 232         vendor_ie = cfg80211_find_vendor_ie(oui, oui_type, ies, ies_len);
 233         if (vendor_ie) {
 234                 if (!*ie_ptr) {
 235                         *ie_ptr = kzalloc(sizeof(struct mwifiex_ie),
 236                                           GFP_KERNEL);
 237                         if (!*ie_ptr)
 238                                 return -ENOMEM;
 239                         ie = *ie_ptr;
 240                 }
 241
 242                 vs_ie = (struct ieee_types_header *)vendor_ie;
 243                 if (le16_to_cpu(ie->ie_length) + vs_ie->len + 2 >
 244                         IEEE_MAX_IE_SIZE)
 245                         return -EINVAL;
 246                 memcpy(ie->ie_buffer + le16_to_cpu(ie->ie_length),
 247                        vs_ie, vs_ie->len + 2);
 248                 le16_add_cpu(&ie->ie_length, vs_ie->len + 2);
 249                 ie->mgmt_subtype_mask = cpu_to_le16(mask);
 250                 ie->ie_index = cpu_to_le16(MWIFIEX_AUTO_IDX_MASK);
 251         }
 252
 253         *ie_ptr = ie;
 254         return 0;
 255 }
 256
 257 /* This function parses beacon IEs, probe response IEs, association response IEs
 258  * from cfg80211_ap_settings->beacon and sets these IE to FW.
 259  */
 260 static int mwifiex_set_mgmt_beacon_data_ies(struct mwifiex_private *priv,
 261                                             struct cfg80211_beacon_data *data)
 262 {
 263         struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL, *ar_ie = NULL;
 264         u16 beacon_idx = MWIFIEX_AUTO_IDX_MASK, pr_idx = MWIFIEX_AUTO_IDX_MASK;
 265         u16 ar_idx = MWIFIEX_AUTO_IDX_MASK;
 266         int ret = 0;
 267
 268         if (data->beacon_ies && data->beacon_ies_len) {
 269                 mwifiex_update_vs_ie(data->beacon_ies, data->beacon_ies_len,
 270                                      &beacon_ie, MGMT_MASK_BEACON,
 271                                      WLAN_OUI_MICROSOFT,
 272                                      WLAN_OUI_TYPE_MICROSOFT_WPS);
 273                 mwifiex_update_vs_ie(data->beacon_ies, data->beacon_ies_len,
 274                                      &beacon_ie, MGMT_MASK_BEACON,
 275                                      WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P);
 276         }
 277
 278         if (data->proberesp_ies && data->proberesp_ies_len) {
 279                 mwifiex_update_vs_ie(data->proberesp_ies,
 280                                      data->proberesp_ies_len, &pr_ie,
 281                                      MGMT_MASK_PROBE_RESP, WLAN_OUI_MICROSOFT,
 282                                      WLAN_OUI_TYPE_MICROSOFT_WPS);
 283                 mwifiex_update_vs_ie(data->proberesp_ies,
 284                                      data->proberesp_ies_len, &pr_ie,
 285                                      MGMT_MASK_PROBE_RESP,
 286                                      WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P);
 287         }
 288
 289         if (data->assocresp_ies && data->assocresp_ies_len) {
 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,
 294                                      WLAN_OUI_MICROSOFT,
 295                                      WLAN_OUI_TYPE_MICROSOFT_WPS);
 296                 mwifiex_update_vs_ie(data->assocresp_ies,
 297                                      data->assocresp_ies_len, &ar_ie,
 298                                      MGMT_MASK_ASSOC_RESP |
 299                                      MGMT_MASK_REASSOC_RESP, WLAN_OUI_WFA,
 300                                      WLAN_OUI_TYPE_WFA_P2P);
 301         }
 302
 303         if (beacon_ie || pr_ie || ar_ie) {
 304                 ret = mwifiex_update_uap_custom_ie(priv, beacon_ie,
 305                                                    &beacon_idx, pr_ie,
 306                                                    &pr_idx, ar_ie, &ar_idx);
 307                 if (ret)
 308                         goto done;
 309         }
 310
 311         priv->beacon_idx = beacon_idx;
 312         priv->proberesp_idx = pr_idx;
 313         priv->assocresp_idx = ar_idx;
 314
 315 done:
 316         kfree(beacon_ie);
 317         kfree(pr_ie);
 318         kfree(ar_ie);
 319
 320         return ret;
 321 }
 322
 323 /* This function parses  head and tail IEs, from cfg80211_beacon_data and sets
 324  * these IE to FW.
 325  */
 326 static int mwifiex_uap_parse_tail_ies(struct mwifiex_private *priv,
 327                                       struct cfg80211_beacon_data *info)
 328 {
 329         struct mwifiex_ie *gen_ie;
 330         struct ieee_types_header *hdr;
 331         struct ieee80211_vendor_ie *vendorhdr;
 332         u16 gen_idx = MWIFIEX_AUTO_IDX_MASK, ie_len = 0;
 333         int left_len, parsed_len = 0;
 334         unsigned int token_len;
 335         int err = 0;
 336
 337         if (!info->tail || !info->tail_len)
 338                 return 0;
 339
 340         gen_ie = kzalloc(sizeof(*gen_ie), GFP_KERNEL);
 341         if (!gen_ie)
 342                 return -ENOMEM;
 343
 344         left_len = info->tail_len;
 345
 346         /* Many IEs are generated in FW by parsing bss configuration.
 347          * Let's not add them here; else we may end up duplicating these IEs
 348          */
 349         while (left_len > sizeof(struct ieee_types_header)) {
 350                 hdr = (void *)(info->tail + parsed_len);
 351                 token_len = hdr->len + sizeof(struct ieee_types_header);
 352                 if (token_len > left_len) {
 353                         err = -EINVAL;
 354                         goto out;
 355                 }
 356
 357                 switch (hdr->element_id) {
 358                 case WLAN_EID_SSID:
 359                 case WLAN_EID_SUPP_RATES:
 360                 case WLAN_EID_COUNTRY:
 361                 case WLAN_EID_PWR_CONSTRAINT:
 362                 case WLAN_EID_EXT_SUPP_RATES:
 363                 case WLAN_EID_HT_CAPABILITY:
 364                 case WLAN_EID_HT_OPERATION:
 365                 case WLAN_EID_VHT_CAPABILITY:
 366                 case WLAN_EID_VHT_OPERATION:
 367                 case WLAN_EID_VENDOR_SPECIFIC:
 368                         break;
 369                 default:
 370                         if (ie_len + token_len > IEEE_MAX_IE_SIZE) {
 371                                 err = -EINVAL;
 372                                 goto out;
 373                         }
 374                         memcpy(gen_ie->ie_buffer + ie_len, hdr, token_len);
 375                         ie_len += token_len;
 376                         break;
 377                 }
 378                 left_len -= token_len;
 379                 parsed_len += token_len;
 380         }
 381
 382         /* parse only WPA vendor IE from tail, WMM IE is configured by
 383          * bss_config command
 384          */
 385         vendorhdr = (void *)cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT,
 386                                                     WLAN_OUI_TYPE_MICROSOFT_WPA,
 387                                                     info->tail, info->tail_len);
 388         if (vendorhdr) {
 389                 token_len = vendorhdr->len + sizeof(struct ieee_types_header);
 390                 if (ie_len + token_len > IEEE_MAX_IE_SIZE) {
 391                         err = -EINVAL;
 392                         goto out;
 393                 }
 394                 memcpy(gen_ie->ie_buffer + ie_len, vendorhdr, token_len);
 395                 ie_len += token_len;
 396         }
 397
 398         if (!ie_len)
 399                 goto out;
 400
 401         gen_ie->ie_index = cpu_to_le16(gen_idx);
 402         gen_ie->mgmt_subtype_mask = cpu_to_le16(MGMT_MASK_BEACON |
 403                                                 MGMT_MASK_PROBE_RESP |
 404                                                 MGMT_MASK_ASSOC_RESP);
 405         gen_ie->ie_length = cpu_to_le16(ie_len);
 406
 407         if (mwifiex_update_uap_custom_ie(priv, gen_ie, &gen_idx, NULL, NULL,
 408                                          NULL, NULL)) {
 409                 err = -EINVAL;
 410                 goto out;
 411         }
 412
 413         priv->gen_idx = gen_idx;
 414
 415  out:
 416         kfree(gen_ie);
 417         return err;
 418 }
 419
 420 /* This function parses different IEs-head & tail IEs, beacon IEs,
 421  * probe response IEs, association response IEs from cfg80211_ap_settings
 422  * function and sets these IE to FW.
 423  */
 424 int mwifiex_set_mgmt_ies(struct mwifiex_private *priv,
 425                          struct cfg80211_beacon_data *info)
 426 {
 427         int ret;
 428
 429         ret = mwifiex_uap_parse_tail_ies(priv, info);
 430
 431         if (ret)
 432                 return ret;
 433
 434         return mwifiex_set_mgmt_beacon_data_ies(priv, info);
 435 }
 436
 437 /* This function removes management IE set */
 438 int mwifiex_del_mgmt_ies(struct mwifiex_private *priv)
 439 {
 440         struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL;
 441         struct mwifiex_ie *ar_ie = NULL, *gen_ie = NULL;
 442         int ret = 0;
 443
 444         if (priv->gen_idx != MWIFIEX_AUTO_IDX_MASK) {
 445                 gen_ie = kmalloc(sizeof(*gen_ie), GFP_KERNEL);
 446                 if (!gen_ie)
 447                         return -ENOMEM;
 448
 449                 gen_ie->ie_index = cpu_to_le16(priv->gen_idx);
 450                 gen_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 451                 gen_ie->ie_length = 0;
 452                 if (mwifiex_update_uap_custom_ie(priv, gen_ie, &priv->gen_idx,
 453                                                  NULL, &priv->proberesp_idx,
 454                                                  NULL, &priv->assocresp_idx)) {
 455                         ret = -1;
 456                         goto done;
 457                 }
 458
 459                 priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
 460         }
 461
 462         if (priv->beacon_idx != MWIFIEX_AUTO_IDX_MASK) {
 463                 beacon_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 464                 if (!beacon_ie) {
 465                         ret = -ENOMEM;
 466                         goto done;
 467                 }
 468                 beacon_ie->ie_index = cpu_to_le16(priv->beacon_idx);
 469                 beacon_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 470                 beacon_ie->ie_length = 0;
 471         }
 472         if (priv->proberesp_idx != MWIFIEX_AUTO_IDX_MASK) {
 473                 pr_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 474                 if (!pr_ie) {
 475                         ret = -ENOMEM;
 476                         goto done;
 477                 }
 478                 pr_ie->ie_index = cpu_to_le16(priv->proberesp_idx);
 479                 pr_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 480                 pr_ie->ie_length = 0;
 481         }
 482         if (priv->assocresp_idx != MWIFIEX_AUTO_IDX_MASK) {
 483                 ar_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 484                 if (!ar_ie) {
 485                         ret = -ENOMEM;
 486                         goto done;
 487                 }
 488                 ar_ie->ie_index = cpu_to_le16(priv->assocresp_idx);
 489                 ar_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 490                 ar_ie->ie_length = 0;
 491         }
 492
 493         if (beacon_ie || pr_ie || ar_ie)
 494                 ret = mwifiex_update_uap_custom_ie(priv,
 495                                                    beacon_ie, &priv->beacon_idx,
 496                                                    pr_ie, &priv->proberesp_idx,
 497                                                    ar_ie, &priv->assocresp_idx);
 498
 499 done:
 500         kfree(gen_ie);
 501         kfree(beacon_ie);
 502         kfree(pr_ie);
 503         kfree(ar_ie);
 504
 505         return ret;
 506 }