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(priv->mgmt_ie[i].ie_length) +
  55                       le16_to_cpu(ie->ie_length);
  56
  57                 if (mask == MWIFIEX_AUTO_IDX_MASK)
  58                         continue;
  59
  60                 if (mask == subtype_mask) {
  61                         if (len > IEEE_MAX_IE_SIZE)
  62                                 continue;
  63
  64                         *index = i;
  65                         return 0;
  66                 }
  67
  68                 if (!priv->mgmt_ie[i].ie_length) {
  69                         if (mwifiex_ie_index_used_by_other_intf(priv, i))
  70                                 continue;
  71
  72                         *index = i;
  73                         return 0;
  74                 }
  75         }
  76
  77         return -1;
  78 }
  79
  80 /* This function prepares IE data buffer for command to be sent to FW */
  81 static int
  82 mwifiex_update_autoindex_ies(struct mwifiex_private *priv,
  83                              struct mwifiex_ie_list *ie_list)
  84 {
  85         u16 travel_len, index, mask;
  86         s16 input_len;
  87         struct mwifiex_ie *ie;
  88         u8 *tmp;
  89
  90         input_len = le16_to_cpu(ie_list->len);
  91         travel_len = sizeof(struct host_cmd_tlv);
  92
  93         ie_list->len = 0;
  94
  95         while (input_len > 0) {
  96                 ie = (struct mwifiex_ie *)(((u8 *)ie_list) + travel_len);
  97                 input_len -= le16_to_cpu(ie->ie_length) + MWIFIEX_IE_HDR_SIZE;
  98                 travel_len += le16_to_cpu(ie->ie_length) + MWIFIEX_IE_HDR_SIZE;
  99
 100                 index = le16_to_cpu(ie->ie_index);
 101                 mask = le16_to_cpu(ie->mgmt_subtype_mask);
 102
 103                 if (index == MWIFIEX_AUTO_IDX_MASK) {
 104                         /* automatic addition */
 105                         if (mwifiex_ie_get_autoidx(priv, mask, ie, &index))
 106                                 return -1;
 107                         if (index == MWIFIEX_AUTO_IDX_MASK)
 108                                 return -1;
 109
 110                         tmp = (u8 *)&priv->mgmt_ie[index].ie_buffer;
 111                         tmp += le16_to_cpu(priv->mgmt_ie[index].ie_length);
 112                         memcpy(tmp, &ie->ie_buffer, le16_to_cpu(ie->ie_length));
 113                         le16_add_cpu(&priv->mgmt_ie[index].ie_length,
 114                                      le16_to_cpu(ie->ie_length));
 115                         priv->mgmt_ie[index].ie_index = cpu_to_le16(index);
 116                         priv->mgmt_ie[index].mgmt_subtype_mask =
 117                                                         cpu_to_le16(mask);
 118
 119                         ie->ie_index = cpu_to_le16(index);
 120                         ie->ie_length = priv->mgmt_ie[index].ie_length;
 121                         memcpy(&ie->ie_buffer, &priv->mgmt_ie[index].ie_buffer,
 122                                le16_to_cpu(priv->mgmt_ie[index].ie_length));
 123                 } else {
 124                         if (mask != MWIFIEX_DELETE_MASK)
 125                                 return -1;
 126                         /*
 127                          * Check if this index is being used on any
 128                          * other interface.
 129                          */
 130                         if (mwifiex_ie_index_used_by_other_intf(priv, index))
 131                                 return -1;
 132
 133                         ie->ie_length = 0;
 134                         memcpy(&priv->mgmt_ie[index], ie,
 135                                sizeof(struct mwifiex_ie));
 136                 }
 137
 138                 le16_add_cpu(&ie_list->len,
 139                              le16_to_cpu(priv->mgmt_ie[index].ie_length) +
 140                              MWIFIEX_IE_HDR_SIZE);
 141         }
 142
 143         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP)
 144                 return mwifiex_send_cmd_async(priv, HostCmd_CMD_UAP_SYS_CONFIG,
 145                                               HostCmd_ACT_GEN_SET,
 146                                               UAP_CUSTOM_IE_I, ie_list);
 147
 148         return 0;
 149 }
 150
 151 /* Copy individual custom IEs for beacon, probe response and assoc response
 152  * and prepare single structure for IE setting.
 153  * This function also updates allocated IE indices from driver.
 154  */
 155 static int
 156 mwifiex_update_uap_custom_ie(struct mwifiex_private *priv,
 157                              struct mwifiex_ie *beacon_ie, u16 *beacon_idx,
 158                              struct mwifiex_ie *pr_ie, u16 *probe_idx,
 159                              struct mwifiex_ie *ar_ie, u16 *assoc_idx)
 160 {
 161         struct mwifiex_ie_list *ap_custom_ie;
 162         u8 *pos;
 163         u16 len;
 164         int ret;
 165
 166         ap_custom_ie = kzalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 167         if (!ap_custom_ie)
 168                 return -ENOMEM;
 169
 170         ap_custom_ie->type = cpu_to_le16(TLV_TYPE_MGMT_IE);
 171         pos = (u8 *)ap_custom_ie->ie_list;
 172
 173         if (beacon_ie) {
 174                 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
 175                       le16_to_cpu(beacon_ie->ie_length);
 176                 memcpy(pos, beacon_ie, len);
 177                 pos += len;
 178                 le16_add_cpu(&ap_custom_ie->len, len);
 179         }
 180         if (pr_ie) {
 181                 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
 182                       le16_to_cpu(pr_ie->ie_length);
 183                 memcpy(pos, pr_ie, len);
 184                 pos += len;
 185                 le16_add_cpu(&ap_custom_ie->len, len);
 186         }
 187         if (ar_ie) {
 188                 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
 189                       le16_to_cpu(ar_ie->ie_length);
 190                 memcpy(pos, ar_ie, len);
 191                 pos += len;
 192                 le16_add_cpu(&ap_custom_ie->len, len);
 193         }
 194
 195         ret = mwifiex_update_autoindex_ies(priv, ap_custom_ie);
 196
 197         pos = (u8 *)(&ap_custom_ie->ie_list[0].ie_index);
 198         if (beacon_ie && *beacon_idx == MWIFIEX_AUTO_IDX_MASK) {
 199                 /* save beacon ie index after auto-indexing */
 200                 *beacon_idx = le16_to_cpu(ap_custom_ie->ie_list[0].ie_index);
 201                 len = sizeof(*beacon_ie) - IEEE_MAX_IE_SIZE +
 202                       le16_to_cpu(beacon_ie->ie_length);
 203                 pos += len;
 204         }
 205         if (pr_ie && le16_to_cpu(pr_ie->ie_index) == MWIFIEX_AUTO_IDX_MASK) {
 206                 /* save probe resp ie index after auto-indexing */
 207                 *probe_idx = *((u16 *)pos);
 208                 len = sizeof(*pr_ie) - IEEE_MAX_IE_SIZE +
 209                       le16_to_cpu(pr_ie->ie_length);
 210                 pos += len;
 211         }
 212         if (ar_ie && le16_to_cpu(ar_ie->ie_index) == MWIFIEX_AUTO_IDX_MASK)
 213                 /* save assoc resp ie index after auto-indexing */
 214                 *assoc_idx = *((u16 *)pos);
 215
 216         return ret;
 217 }
 218
 219 /* This function parses different IEs- Tail IEs, beacon IEs, probe response IEs,
 220  * association response IEs from cfg80211_ap_settings function and sets these IE
 221  * to FW.
 222  */
 223 int mwifiex_set_mgmt_ies(struct mwifiex_private *priv,
 224                          struct cfg80211_ap_settings *params)
 225 {
 226         struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL;
 227         struct mwifiex_ie *ar_ie = NULL, *rsn_ie = NULL;
 228         struct ieee_types_header *ie = NULL;
 229         u16 beacon_idx = MWIFIEX_AUTO_IDX_MASK, pr_idx = MWIFIEX_AUTO_IDX_MASK;
 230         u16 ar_idx = MWIFIEX_AUTO_IDX_MASK, rsn_idx = MWIFIEX_AUTO_IDX_MASK;
 231         u16 mask;
 232         int ret = 0;
 233
 234         if (params->beacon.tail && params->beacon.tail_len) {
 235                 ie = (void *)cfg80211_find_ie(WLAN_EID_RSN, params->beacon.tail,
 236                                               params->beacon.tail_len);
 237                 if (ie) {
 238                         rsn_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 239                         if (!rsn_ie)
 240                                 return -ENOMEM;
 241
 242                         rsn_ie->ie_index = cpu_to_le16(rsn_idx);
 243                         mask = MGMT_MASK_BEACON | MGMT_MASK_PROBE_RESP |
 244                                MGMT_MASK_ASSOC_RESP;
 245                         rsn_ie->mgmt_subtype_mask = cpu_to_le16(mask);
 246                         rsn_ie->ie_length = cpu_to_le16(ie->len + 2);
 247                         memcpy(rsn_ie->ie_buffer, ie, ie->len + 2);
 248
 249                         if (mwifiex_update_uap_custom_ie(priv, rsn_ie, &rsn_idx,
 250                                                          NULL, NULL,
 251                                                          NULL, NULL)) {
 252                                 ret = -1;
 253                                 goto done;
 254                         }
 255
 256                         priv->rsn_idx = rsn_idx;
 257                 }
 258         }
 259
 260         if (params->beacon.beacon_ies && params->beacon.beacon_ies_len) {
 261                 beacon_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 262                 if (!beacon_ie) {
 263                         ret = -ENOMEM;
 264                         goto done;
 265                 }
 266
 267                 beacon_ie->ie_index = cpu_to_le16(beacon_idx);
 268                 beacon_ie->mgmt_subtype_mask = cpu_to_le16(MGMT_MASK_BEACON);
 269                 beacon_ie->ie_length =
 270                                 cpu_to_le16(params->beacon.beacon_ies_len);
 271                 memcpy(beacon_ie->ie_buffer, params->beacon.beacon_ies,
 272                        params->beacon.beacon_ies_len);
 273         }
 274
 275         if (params->beacon.proberesp_ies && params->beacon.proberesp_ies_len) {
 276                 pr_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 277                 if (!pr_ie) {
 278                         ret = -ENOMEM;
 279                         goto done;
 280                 }
 281
 282                 pr_ie->ie_index = cpu_to_le16(pr_idx);
 283                 pr_ie->mgmt_subtype_mask = cpu_to_le16(MGMT_MASK_PROBE_RESP);
 284                 pr_ie->ie_length =
 285                                 cpu_to_le16(params->beacon.proberesp_ies_len);
 286                 memcpy(pr_ie->ie_buffer, params->beacon.proberesp_ies,
 287                        params->beacon.proberesp_ies_len);
 288         }
 289
 290         if (params->beacon.assocresp_ies && params->beacon.assocresp_ies_len) {
 291                 ar_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 292                 if (!ar_ie) {
 293                         ret = -ENOMEM;
 294                         goto done;
 295                 }
 296
 297                 ar_ie->ie_index = cpu_to_le16(ar_idx);
 298                 mask = MGMT_MASK_ASSOC_RESP | MGMT_MASK_REASSOC_RESP;
 299                 ar_ie->mgmt_subtype_mask = cpu_to_le16(mask);
 300                 ar_ie->ie_length =
 301                                 cpu_to_le16(params->beacon.assocresp_ies_len);
 302                 memcpy(ar_ie->ie_buffer, params->beacon.assocresp_ies,
 303                        params->beacon.assocresp_ies_len);
 304         }
 305
 306         if (beacon_ie || pr_ie || ar_ie) {
 307                 ret = mwifiex_update_uap_custom_ie(priv, beacon_ie,
 308                                                    &beacon_idx, pr_ie,
 309                                                    &pr_idx, ar_ie, &ar_idx);
 310                 if (ret)
 311                         goto done;
 312         }
 313
 314         priv->beacon_idx = beacon_idx;
 315         priv->proberesp_idx = pr_idx;
 316         priv->assocresp_idx = ar_idx;
 317
 318 done:
 319         kfree(beacon_ie);
 320         kfree(pr_ie);
 321         kfree(ar_ie);
 322         kfree(rsn_ie);
 323
 324         return ret;
 325 }
 326
 327 /* This function removes management IE set */
 328 int mwifiex_del_mgmt_ies(struct mwifiex_private *priv)
 329 {
 330         struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL;
 331         struct mwifiex_ie *ar_ie = NULL, *rsn_ie = NULL;
 332         int ret = 0;
 333
 334         if (priv->rsn_idx != MWIFIEX_AUTO_IDX_MASK) {
 335                 rsn_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 336                 if (!rsn_ie)
 337                         return -ENOMEM;
 338
 339                 rsn_ie->ie_index = cpu_to_le16(priv->rsn_idx);
 340                 rsn_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 341                 rsn_ie->ie_length = 0;
 342                 if (mwifiex_update_uap_custom_ie(priv, rsn_ie, &priv->rsn_idx,
 343                                                  NULL, &priv->proberesp_idx,
 344                                                  NULL, &priv->assocresp_idx)) {
 345                         ret = -1;
 346                         goto done;
 347                 }
 348
 349                 priv->rsn_idx = MWIFIEX_AUTO_IDX_MASK;
 350         }
 351
 352         if (priv->beacon_idx != MWIFIEX_AUTO_IDX_MASK) {
 353                 beacon_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 354                 if (!beacon_ie) {
 355                         ret = -ENOMEM;
 356                         goto done;
 357                 }
 358                 beacon_ie->ie_index = cpu_to_le16(priv->beacon_idx);
 359                 beacon_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 360                 beacon_ie->ie_length = 0;
 361         }
 362         if (priv->proberesp_idx != MWIFIEX_AUTO_IDX_MASK) {
 363                 pr_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 364                 if (!pr_ie) {
 365                         ret = -ENOMEM;
 366                         goto done;
 367                 }
 368                 pr_ie->ie_index = cpu_to_le16(priv->proberesp_idx);
 369                 pr_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 370                 pr_ie->ie_length = 0;
 371         }
 372         if (priv->assocresp_idx != MWIFIEX_AUTO_IDX_MASK) {
 373                 ar_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
 374                 if (!ar_ie) {
 375                         ret = -ENOMEM;
 376                         goto done;
 377                 }
 378                 ar_ie->ie_index = cpu_to_le16(priv->assocresp_idx);
 379                 ar_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
 380                 ar_ie->ie_length = 0;
 381         }
 382
 383         if (beacon_ie || pr_ie || ar_ie)
 384                 ret = mwifiex_update_uap_custom_ie(priv,
 385                                                    beacon_ie, &priv->beacon_idx,
 386                                                    pr_ie, &priv->proberesp_idx,
 387                                                    ar_ie, &priv->assocresp_idx);
 388
 389 done:
 390         kfree(beacon_ie);
 391         kfree(pr_ie);
 392         kfree(ar_ie);
 393         kfree(rsn_ie);
 394
 395         return ret;
 396 }