drivers/net/wireless/mwifiex/scan.c

   1 /*
   2  * Marvell Wireless LAN device driver: scan ioctl and command handling
   3  *
   4  * Copyright (C) 2011, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "11n.h"
  26 #include "cfg80211.h"
  27
  28 /* The maximum number of channels the firmware can scan per command */
  29 #define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN   14
  30
  31 #define MWIFIEX_CHANNELS_PER_SCAN_CMD            4
  32
  33 /* Memory needed to store a max sized Channel List TLV for a firmware scan */
  34 #define CHAN_TLV_MAX_SIZE  (sizeof(struct mwifiex_ie_types_header)         \
  35                                 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN     \
  36                                 *sizeof(struct mwifiex_chan_scan_param_set)))
  37
  38 /* Memory needed to store supported rate */
  39 #define RATE_TLV_MAX_SIZE   (sizeof(struct mwifiex_ie_types_rates_param_set) \
  40                                 + HOSTCMD_SUPPORTED_RATES)
  41
  42 /* Memory needed to store a max number/size WildCard SSID TLV for a firmware
  43         scan */
  44 #define WILDCARD_SSID_TLV_MAX_SIZE  \
  45         (MWIFIEX_MAX_SSID_LIST_LENGTH *                                 \
  46                 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params)   \
  47                         + IEEE80211_MAX_SSID_LEN))
  48
  49 /* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */
  50 #define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config)        \
  51                                 + sizeof(struct mwifiex_ie_types_num_probes)   \
  52                                 + sizeof(struct mwifiex_ie_types_htcap)       \
  53                                 + CHAN_TLV_MAX_SIZE                 \
  54                                 + RATE_TLV_MAX_SIZE                 \
  55                                 + WILDCARD_SSID_TLV_MAX_SIZE)
  56
  57
  58 union mwifiex_scan_cmd_config_tlv {
  59         /* Scan configuration (variable length) */
  60         struct mwifiex_scan_cmd_config config;
  61         /* Max allocated block */
  62         u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
  63 };
  64
  65 enum cipher_suite {
  66         CIPHER_SUITE_TKIP,
  67         CIPHER_SUITE_CCMP,
  68         CIPHER_SUITE_MAX
  69 };
  70 static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
  71         { 0x00, 0x50, 0xf2, 0x02 },     /* TKIP */
  72         { 0x00, 0x50, 0xf2, 0x04 },     /* AES  */
  73 };
  74 static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = {
  75         { 0x00, 0x0f, 0xac, 0x02 },     /* TKIP */
  76         { 0x00, 0x0f, 0xac, 0x04 },     /* AES  */
  77 };
  78
  79 /*
  80  * This function parses a given IE for a given OUI.
  81  *
  82  * This is used to parse a WPA/RSN IE to find if it has
  83  * a given oui in PTK.
  84  */
  85 static u8
  86 mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
  87 {
  88         u8 count;
  89
  90         count = iebody->ptk_cnt[0];
  91
  92         /* There could be multiple OUIs for PTK hence
  93            1) Take the length.
  94            2) Check all the OUIs for AES.
  95            3) If one of them is AES then pass success. */
  96         while (count) {
  97                 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
  98                         return MWIFIEX_OUI_PRESENT;
  99
 100                 --count;
 101                 if (count)
 102                         iebody = (struct ie_body *) ((u8 *) iebody +
 103                                                 sizeof(iebody->ptk_body));
 104         }
 105
 106         pr_debug("info: %s: OUI is not found in PTK\n", __func__);
 107         return MWIFIEX_OUI_NOT_PRESENT;
 108 }
 109
 110 /*
 111  * This function checks if a given OUI is present in a RSN IE.
 112  *
 113  * The function first checks if a RSN IE is present or not in the
 114  * BSS descriptor. It tries to locate the OUI only if such an IE is
 115  * present.
 116  */
 117 static u8
 118 mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
 119 {
 120         u8 *oui;
 121         struct ie_body *iebody;
 122         u8 ret = MWIFIEX_OUI_NOT_PRESENT;
 123
 124         if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).
 125                                         ieee_hdr.element_id == WLAN_EID_RSN))) {
 126                 iebody = (struct ie_body *)
 127                          (((u8 *) bss_desc->bcn_rsn_ie->data) +
 128                           RSN_GTK_OUI_OFFSET);
 129                 oui = &mwifiex_rsn_oui[cipher][0];
 130                 ret = mwifiex_search_oui_in_ie(iebody, oui);
 131                 if (ret)
 132                         return ret;
 133         }
 134         return ret;
 135 }
 136
 137 /*
 138  * This function checks if a given OUI is present in a WPA IE.
 139  *
 140  * The function first checks if a WPA IE is present or not in the
 141  * BSS descriptor. It tries to locate the OUI only if such an IE is
 142  * present.
 143  */
 144 static u8
 145 mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
 146 {
 147         u8 *oui;
 148         struct ie_body *iebody;
 149         u8 ret = MWIFIEX_OUI_NOT_PRESENT;
 150
 151         if (((bss_desc->bcn_wpa_ie) &&
 152              ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id ==
 153               WLAN_EID_WPA))) {
 154                 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
 155                 oui = &mwifiex_wpa_oui[cipher][0];
 156                 ret = mwifiex_search_oui_in_ie(iebody, oui);
 157                 if (ret)
 158                         return ret;
 159         }
 160         return ret;
 161 }
 162
 163 /*
 164  * This function compares two SSIDs and checks if they match.
 165  */
 166 s32
 167 mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
 168 {
 169         if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
 170                 return -1;
 171         return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
 172 }
 173
 174 /*
 175  * This function checks if wapi is enabled in driver and scanned network is
 176  * compatible with it.
 177  */
 178 static bool
 179 mwifiex_is_bss_wapi(struct mwifiex_private *priv,
 180                     struct mwifiex_bssdescriptor *bss_desc)
 181 {
 182         if (priv->sec_info.wapi_enabled &&
 183             (bss_desc->bcn_wapi_ie &&
 184              ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id ==
 185                         WLAN_EID_BSS_AC_ACCESS_DELAY))) {
 186                 return true;
 187         }
 188         return false;
 189 }
 190
 191 /*
 192  * This function checks if driver is configured with no security mode and
 193  * scanned network is compatible with it.
 194  */
 195 static bool
 196 mwifiex_is_bss_no_sec(struct mwifiex_private *priv,
 197                       struct mwifiex_bssdescriptor *bss_desc)
 198 {
 199         if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
 200             !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
 201                 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
 202                  WLAN_EID_WPA)) &&
 203             ((!bss_desc->bcn_rsn_ie) ||
 204                 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
 205                  WLAN_EID_RSN)) &&
 206             !priv->sec_info.encryption_mode && !bss_desc->privacy) {
 207                 return true;
 208         }
 209         return false;
 210 }
 211
 212 /*
 213  * This function checks if static WEP is enabled in driver and scanned network
 214  * is compatible with it.
 215  */
 216 static bool
 217 mwifiex_is_bss_static_wep(struct mwifiex_private *priv,
 218                           struct mwifiex_bssdescriptor *bss_desc)
 219 {
 220         if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
 221             !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
 222                 return true;
 223         }
 224         return false;
 225 }
 226
 227 /*
 228  * This function checks if wpa is enabled in driver and scanned network is
 229  * compatible with it.
 230  */
 231 static bool
 232 mwifiex_is_bss_wpa(struct mwifiex_private *priv,
 233                    struct mwifiex_bssdescriptor *bss_desc)
 234 {
 235         if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
 236             !priv->sec_info.wpa2_enabled && ((bss_desc->bcn_wpa_ie) &&
 237             ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id == WLAN_EID_WPA))
 238            /*
 239             * Privacy bit may NOT be set in some APs like
 240             * LinkSys WRT54G && bss_desc->privacy
 241             */
 242          ) {
 243                 dev_dbg(priv->adapter->dev, "info: %s: WPA:"
 244                         " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
 245                         "EncMode=%#x privacy=%#x\n", __func__,
 246                         (bss_desc->bcn_wpa_ie) ?
 247                         (*(bss_desc->bcn_wpa_ie)).
 248                         vend_hdr.element_id : 0,
 249                         (bss_desc->bcn_rsn_ie) ?
 250                         (*(bss_desc->bcn_rsn_ie)).
 251                         ieee_hdr.element_id : 0,
 252                         (priv->sec_info.wep_enabled) ? "e" : "d",
 253                         (priv->sec_info.wpa_enabled) ? "e" : "d",
 254                         (priv->sec_info.wpa2_enabled) ? "e" : "d",
 255                         priv->sec_info.encryption_mode,
 256                         bss_desc->privacy);
 257                 return true;
 258         }
 259         return false;
 260 }
 261
 262 /*
 263  * This function checks if wpa2 is enabled in driver and scanned network is
 264  * compatible with it.
 265  */
 266 static bool
 267 mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
 268                     struct mwifiex_bssdescriptor *bss_desc)
 269 {
 270         if (!priv->sec_info.wep_enabled &&
 271             !priv->sec_info.wpa_enabled &&
 272             priv->sec_info.wpa2_enabled &&
 273             ((bss_desc->bcn_rsn_ie) &&
 274              ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))) {
 275                 /*
 276                  * Privacy bit may NOT be set in some APs like
 277                  * LinkSys WRT54G && bss_desc->privacy
 278                  */
 279                 dev_dbg(priv->adapter->dev, "info: %s: WPA2: "
 280                         " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
 281                         "EncMode=%#x privacy=%#x\n", __func__,
 282                         (bss_desc->bcn_wpa_ie) ?
 283                         (*(bss_desc->bcn_wpa_ie)).
 284                         vend_hdr.element_id : 0,
 285                         (bss_desc->bcn_rsn_ie) ?
 286                         (*(bss_desc->bcn_rsn_ie)).
 287                         ieee_hdr.element_id : 0,
 288                         (priv->sec_info.wep_enabled) ? "e" : "d",
 289                         (priv->sec_info.wpa_enabled) ? "e" : "d",
 290                         (priv->sec_info.wpa2_enabled) ? "e" : "d",
 291                         priv->sec_info.encryption_mode,
 292                         bss_desc->privacy);
 293                 return true;
 294         }
 295         return false;
 296 }
 297
 298 /*
 299  * This function checks if adhoc AES is enabled in driver and scanned network is
 300  * compatible with it.
 301  */
 302 static bool
 303 mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
 304                          struct mwifiex_bssdescriptor *bss_desc)
 305 {
 306         if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
 307             !priv->sec_info.wpa2_enabled &&
 308             ((!bss_desc->bcn_wpa_ie) ||
 309              ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA)) &&
 310             ((!bss_desc->bcn_rsn_ie) ||
 311              ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
 312             !priv->sec_info.encryption_mode && bss_desc->privacy) {
 313                 return true;
 314         }
 315         return false;
 316 }
 317
 318 /*
 319  * This function checks if dynamic WEP is enabled in driver and scanned network
 320  * is compatible with it.
 321  */
 322 static bool
 323 mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
 324                            struct mwifiex_bssdescriptor *bss_desc)
 325 {
 326         if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
 327             !priv->sec_info.wpa2_enabled &&
 328             ((!bss_desc->bcn_wpa_ie) ||
 329              ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA)) &&
 330             ((!bss_desc->bcn_rsn_ie) ||
 331              ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
 332             priv->sec_info.encryption_mode && bss_desc->privacy) {
 333                 dev_dbg(priv->adapter->dev, "info: %s: dynamic "
 334                         "WEP: wpa_ie=%#x wpa2_ie=%#x "
 335                         "EncMode=%#x privacy=%#x\n",
 336                         __func__,
 337                         (bss_desc->bcn_wpa_ie) ?
 338                         (*(bss_desc->bcn_wpa_ie)).
 339                         vend_hdr.element_id : 0,
 340                         (bss_desc->bcn_rsn_ie) ?
 341                         (*(bss_desc->bcn_rsn_ie)).
 342                         ieee_hdr.element_id : 0,
 343                         priv->sec_info.encryption_mode,
 344                         bss_desc->privacy);
 345                 return true;
 346         }
 347         return false;
 348 }
 349
 350 /*
 351  * This function checks if a scanned network is compatible with the driver
 352  * settings.
 353  *
 354  *   WEP     WPA    WPA2   ad-hoc encrypt                  Network
 355  * enabled enabled enabled  AES    mode   Privacy WPA WPA2 Compatible
 356  *    0       0       0      0     NONE      0     0   0   yes No security
 357  *    0       1       0      0      x        1x    1   x   yes WPA (disable
 358  *                                                         HT if no AES)
 359  *    0       0       1      0      x        1x    x   1   yes WPA2 (disable
 360  *                                                         HT if no AES)
 361  *    0       0       0      1     NONE      1     0   0   yes Ad-hoc AES
 362  *    1       0       0      0     NONE      1     0   0   yes Static WEP
 363  *                                                         (disable HT)
 364  *    0       0       0      0    !=NONE     1     0   0   yes Dynamic WEP
 365  *
 366  * Compatibility is not matched while roaming, except for mode.
 367  */
 368 static s32
 369 mwifiex_is_network_compatible(struct mwifiex_private *priv,
 370                               struct mwifiex_bssdescriptor *bss_desc, u32 mode)
 371 {
 372         struct mwifiex_adapter *adapter = priv->adapter;
 373
 374         bss_desc->disable_11n = false;
 375
 376         /* Don't check for compatibility if roaming */
 377         if (priv->media_connected &&
 378             (priv->bss_mode == NL80211_IFTYPE_STATION) &&
 379             (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
 380                 return 0;
 381
 382         if (priv->wps.session_enable) {
 383                 dev_dbg(adapter->dev,
 384                         "info: return success directly in WPS period\n");
 385                 return 0;
 386         }
 387
 388         if (mwifiex_is_bss_wapi(priv, bss_desc)) {
 389                 dev_dbg(adapter->dev, "info: return success for WAPI AP\n");
 390                 return 0;
 391         }
 392
 393         if (bss_desc->bss_mode == mode) {
 394                 if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
 395                         /* No security */
 396                         return 0;
 397                 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
 398                         /* Static WEP enabled */
 399                         dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n");
 400                         bss_desc->disable_11n = true;
 401                         return 0;
 402                 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
 403                         /* WPA enabled */
 404                         if (((priv->adapter->config_bands & BAND_GN ||
 405                               priv->adapter->config_bands & BAND_AN) &&
 406                              bss_desc->bcn_ht_cap) &&
 407                             !mwifiex_is_wpa_oui_present(bss_desc,
 408                                                          CIPHER_SUITE_CCMP)) {
 409
 410                                 if (mwifiex_is_wpa_oui_present
 411                                                 (bss_desc, CIPHER_SUITE_TKIP)) {
 412                                         dev_dbg(adapter->dev,
 413                                                 "info: Disable 11n if AES "
 414                                                 "is not supported by AP\n");
 415                                         bss_desc->disable_11n = true;
 416                                 } else {
 417                                         return -1;
 418                                 }
 419                         }
 420                         return 0;
 421                 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
 422                         /* WPA2 enabled */
 423                         if (((priv->adapter->config_bands & BAND_GN ||
 424                               priv->adapter->config_bands & BAND_AN) &&
 425                              bss_desc->bcn_ht_cap) &&
 426                             !mwifiex_is_rsn_oui_present(bss_desc,
 427                                                         CIPHER_SUITE_CCMP)) {
 428
 429                                 if (mwifiex_is_rsn_oui_present
 430                                                 (bss_desc, CIPHER_SUITE_TKIP)) {
 431                                         dev_dbg(adapter->dev,
 432                                                 "info: Disable 11n if AES "
 433                                                 "is not supported by AP\n");
 434                                         bss_desc->disable_11n = true;
 435                                 } else {
 436                                         return -1;
 437                                 }
 438                         }
 439                         return 0;
 440                 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) {
 441                         /* Ad-hoc AES enabled */
 442                         return 0;
 443                 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) {
 444                         /* Dynamic WEP enabled */
 445                         return 0;
 446                 }
 447
 448                 /* Security doesn't match */
 449                 dev_dbg(adapter->dev,
 450                         "info: %s: failed: wpa_ie=%#x wpa2_ie=%#x WEP=%s "
 451                         "WPA=%s WPA2=%s EncMode=%#x privacy=%#x\n", __func__,
 452                         (bss_desc->bcn_wpa_ie) ?
 453                         (*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id : 0,
 454                         (bss_desc->bcn_rsn_ie) ?
 455                         (*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id : 0,
 456                         (priv->sec_info.wep_enabled) ? "e" : "d",
 457                         (priv->sec_info.wpa_enabled) ? "e" : "d",
 458                         (priv->sec_info.wpa2_enabled) ? "e" : "d",
 459                         priv->sec_info.encryption_mode, bss_desc->privacy);
 460                 return -1;
 461         }
 462
 463         /* Mode doesn't match */
 464         return -1;
 465 }
 466
 467 /*
 468  * This function creates a channel list for the driver to scan, based
 469  * on region/band information.
 470  *
 471  * This routine is used for any scan that is not provided with a
 472  * specific channel list to scan.
 473  */
 474 static void
 475 mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
 476                                  const struct mwifiex_user_scan_cfg
 477                                                         *user_scan_in,
 478                                  struct mwifiex_chan_scan_param_set
 479                                                         *scan_chan_list,
 480                                  u8 filtered_scan)
 481 {
 482         enum ieee80211_band band;
 483         struct ieee80211_supported_band *sband;
 484         struct ieee80211_channel *ch;
 485         struct mwifiex_adapter *adapter = priv->adapter;
 486         int chan_idx = 0, i;
 487
 488         for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) {
 489
 490                 if (!priv->wdev->wiphy->bands[band])
 491                         continue;
 492
 493                 sband = priv->wdev->wiphy->bands[band];
 494
 495                 for (i = 0; (i < sband->n_channels) ; i++) {
 496                         ch = &sband->channels[i];
 497                         if (ch->flags & IEEE80211_CHAN_DISABLED)
 498                                 continue;
 499                         scan_chan_list[chan_idx].radio_type = band;
 500
 501                         if (user_scan_in &&
 502                             user_scan_in->chan_list[0].scan_time)
 503                                 scan_chan_list[chan_idx].max_scan_time =
 504                                         cpu_to_le16((u16) user_scan_in->
 505                                         chan_list[0].scan_time);
 506                         else if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 507                                 scan_chan_list[chan_idx].max_scan_time =
 508                                         cpu_to_le16(adapter->passive_scan_time);
 509                         else
 510                                 scan_chan_list[chan_idx].max_scan_time =
 511                                         cpu_to_le16(adapter->active_scan_time);
 512
 513                         if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 514                                 scan_chan_list[chan_idx].chan_scan_mode_bitmap
 515                                         |= MWIFIEX_PASSIVE_SCAN;
 516                         else
 517                                 scan_chan_list[chan_idx].chan_scan_mode_bitmap
 518                                         &= ~MWIFIEX_PASSIVE_SCAN;
 519                         scan_chan_list[chan_idx].chan_number =
 520                                                         (u32) ch->hw_value;
 521                         if (filtered_scan) {
 522                                 scan_chan_list[chan_idx].max_scan_time =
 523                                 cpu_to_le16(adapter->specific_scan_time);
 524                                 scan_chan_list[chan_idx].chan_scan_mode_bitmap
 525                                         |= MWIFIEX_DISABLE_CHAN_FILT;
 526                         }
 527                         chan_idx++;
 528                 }
 529
 530         }
 531 }
 532
 533 /*
 534  * This function constructs and sends multiple scan config commands to
 535  * the firmware.
 536  *
 537  * Previous routines in the code flow have created a scan command configuration
 538  * with any requested TLVs.  This function splits the channel TLV into maximum
 539  * channels supported per scan lists and sends the portion of the channel TLV,
 540  * along with the other TLVs, to the firmware.
 541  */
 542 static int
 543 mwifiex_scan_channel_list(struct mwifiex_private *priv,
 544                           u32 max_chan_per_scan, u8 filtered_scan,
 545                           struct mwifiex_scan_cmd_config *scan_cfg_out,
 546                           struct mwifiex_ie_types_chan_list_param_set
 547                           *chan_tlv_out,
 548                           struct mwifiex_chan_scan_param_set *scan_chan_list)
 549 {
 550         int ret = 0;
 551         struct mwifiex_chan_scan_param_set *tmp_chan_list;
 552         struct mwifiex_chan_scan_param_set *start_chan;
 553
 554         u32 tlv_idx;
 555         u32 total_scan_time;
 556         u32 done_early;
 557
 558         if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
 559                 dev_dbg(priv->adapter->dev,
 560                         "info: Scan: Null detect: %p, %p, %p\n",
 561                        scan_cfg_out, chan_tlv_out, scan_chan_list);
 562                 return -1;
 563         }
 564
 565         chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
 566
 567         /* Set the temp channel struct pointer to the start of the desired
 568            list */
 569         tmp_chan_list = scan_chan_list;
 570
 571         /* Loop through the desired channel list, sending a new firmware scan
 572            commands for each max_chan_per_scan channels (or for 1,6,11
 573            individually if configured accordingly) */
 574         while (tmp_chan_list->chan_number) {
 575
 576                 tlv_idx = 0;
 577                 total_scan_time = 0;
 578                 chan_tlv_out->header.len = 0;
 579                 start_chan = tmp_chan_list;
 580                 done_early = false;
 581
 582                 /*
 583                  * Construct the Channel TLV for the scan command.  Continue to
 584                  * insert channel TLVs until:
 585                  *   - the tlv_idx hits the maximum configured per scan command
 586                  *   - the next channel to insert is 0 (end of desired channel
 587                  *     list)
 588                  *   - done_early is set (controlling individual scanning of
 589                  *     1,6,11)
 590                  */
 591                 while (tlv_idx < max_chan_per_scan &&
 592                        tmp_chan_list->chan_number && !done_early) {
 593
 594                         dev_dbg(priv->adapter->dev,
 595                                 "info: Scan: Chan(%3d), Radio(%d),"
 596                                 " Mode(%d, %d), Dur(%d)\n",
 597                                 tmp_chan_list->chan_number,
 598                                 tmp_chan_list->radio_type,
 599                                 tmp_chan_list->chan_scan_mode_bitmap
 600                                 & MWIFIEX_PASSIVE_SCAN,
 601                                 (tmp_chan_list->chan_scan_mode_bitmap
 602                                  & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
 603                                 le16_to_cpu(tmp_chan_list->max_scan_time));
 604
 605                         /* Copy the current channel TLV to the command being
 606                            prepared */
 607                         memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
 608                                tmp_chan_list,
 609                                sizeof(chan_tlv_out->chan_scan_param));
 610
 611                         /* Increment the TLV header length by the size
 612                            appended */
 613                         chan_tlv_out->header.len =
 614                         cpu_to_le16(le16_to_cpu(chan_tlv_out->header.len) +
 615                         (sizeof(chan_tlv_out->chan_scan_param)));
 616
 617                         /*
 618                          * The tlv buffer length is set to the number of bytes
 619                          * of the between the channel tlv pointer and the start
 620                          * of the tlv buffer.  This compensates for any TLVs
 621                          * that were appended before the channel list.
 622                          */
 623                         scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
 624                                                         scan_cfg_out->tlv_buf);
 625
 626                         /* Add the size of the channel tlv header and the data
 627                            length */
 628                         scan_cfg_out->tlv_buf_len +=
 629                                 (sizeof(chan_tlv_out->header)
 630                                  + le16_to_cpu(chan_tlv_out->header.len));
 631
 632                         /* Increment the index to the channel tlv we are
 633                            constructing */
 634                         tlv_idx++;
 635
 636                         /* Count the total scan time per command */
 637                         total_scan_time +=
 638                                 le16_to_cpu(tmp_chan_list->max_scan_time);
 639
 640                         done_early = false;
 641
 642                         /* Stop the loop if the *current* channel is in the
 643                            1,6,11 set and we are not filtering on a BSSID
 644                            or SSID. */
 645                         if (!filtered_scan &&
 646                             (tmp_chan_list->chan_number == 1 ||
 647                              tmp_chan_list->chan_number == 6 ||
 648                              tmp_chan_list->chan_number == 11))
 649                                 done_early = true;
 650
 651                         /* Increment the tmp pointer to the next channel to
 652                            be scanned */
 653                         tmp_chan_list++;
 654
 655                         /* Stop the loop if the *next* channel is in the 1,6,11
 656                            set.  This will cause it to be the only channel
 657                            scanned on the next interation */
 658                         if (!filtered_scan &&
 659                             (tmp_chan_list->chan_number == 1 ||
 660                              tmp_chan_list->chan_number == 6 ||
 661                              tmp_chan_list->chan_number == 11))
 662                                 done_early = true;
 663                 }
 664
 665                 /* The total scan time should be less than scan command timeout
 666                    value */
 667                 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
 668                         dev_err(priv->adapter->dev, "total scan time %dms"
 669                                 " is over limit (%dms), scan skipped\n",
 670                                 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME);
 671                         ret = -1;
 672                         break;
 673                 }
 674
 675                 priv->adapter->scan_channels = start_chan;
 676
 677                 /* Send the scan command to the firmware with the specified
 678                    cfg */
 679                 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SCAN,
 680                                              HostCmd_ACT_GEN_SET, 0,
 681                                              scan_cfg_out);
 682                 if (ret)
 683                         break;
 684         }
 685
 686         if (ret)
 687                 return -1;
 688
 689         return 0;
 690 }
 691
 692 /*
 693  * This function constructs a scan command configuration structure to use
 694  * in scan commands.
 695  *
 696  * Application layer or other functions can invoke network scanning
 697  * with a scan configuration supplied in a user scan configuration structure.
 698  * This structure is used as the basis of one or many scan command configuration
 699  * commands that are sent to the command processing module and eventually to the
 700  * firmware.
 701  *
 702  * This function creates a scan command configuration structure  based on the
 703  * following user supplied parameters (if present):
 704  *      - SSID filter
 705  *      - BSSID filter
 706  *      - Number of Probes to be sent
 707  *      - Channel list
 708  *
 709  * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
 710  * If the number of probes is not set, adapter default setting is used.
 711  */
 712 static void
 713 mwifiex_config_scan(struct mwifiex_private *priv,
 714                     const struct mwifiex_user_scan_cfg *user_scan_in,
 715                     struct mwifiex_scan_cmd_config *scan_cfg_out,
 716                     struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
 717                     struct mwifiex_chan_scan_param_set *scan_chan_list,
 718                     u8 *max_chan_per_scan, u8 *filtered_scan,
 719                     u8 *scan_current_only)
 720 {
 721         struct mwifiex_adapter *adapter = priv->adapter;
 722         struct mwifiex_ie_types_num_probes *num_probes_tlv;
 723         struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
 724         struct mwifiex_ie_types_rates_param_set *rates_tlv;
 725         const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
 726         u8 *tlv_pos;
 727         u32 num_probes;
 728         u32 ssid_len;
 729         u32 chan_idx;
 730         u32 scan_type;
 731         u16 scan_dur;
 732         u8 channel;
 733         u8 radio_type;
 734         int i;
 735         u8 ssid_filter;
 736         u8 rates[MWIFIEX_SUPPORTED_RATES];
 737         u32 rates_size;
 738         struct mwifiex_ie_types_htcap *ht_cap;
 739
 740         /* The tlv_buf_len is calculated for each scan command.  The TLVs added
 741            in this routine will be preserved since the routine that sends the
 742            command will append channelTLVs at *chan_list_out.  The difference
 743            between the *chan_list_out and the tlv_buf start will be used to
 744            calculate the size of anything we add in this routine. */
 745         scan_cfg_out->tlv_buf_len = 0;
 746
 747         /* Running tlv pointer.  Assigned to chan_list_out at end of function
 748            so later routines know where channels can be added to the command
 749            buf */
 750         tlv_pos = scan_cfg_out->tlv_buf;
 751
 752         /* Initialize the scan as un-filtered; the flag is later set to TRUE
 753            below if a SSID or BSSID filter is sent in the command */
 754         *filtered_scan = false;
 755
 756         /* Initialize the scan as not being only on the current channel.  If
 757            the channel list is customized, only contains one channel, and is
 758            the active channel, this is set true and data flow is not halted. */
 759         *scan_current_only = false;
 760
 761         if (user_scan_in) {
 762
 763                 /* Default the ssid_filter flag to TRUE, set false under
 764                    certain wildcard conditions and qualified by the existence
 765                    of an SSID list before marking the scan as filtered */
 766                 ssid_filter = true;
 767
 768                 /* Set the BSS type scan filter, use Adapter setting if
 769                    unset */
 770                 scan_cfg_out->bss_mode =
 771                         (user_scan_in->bss_mode ? (u8) user_scan_in->
 772                          bss_mode : (u8) adapter->scan_mode);
 773
 774                 /* Set the number of probes to send, use Adapter setting
 775                    if unset */
 776                 num_probes =
 777                         (user_scan_in->num_probes ? user_scan_in->
 778                          num_probes : adapter->scan_probes);
 779
 780                 /*
 781                  * Set the BSSID filter to the incoming configuration,
 782                  * if non-zero.  If not set, it will remain disabled
 783                  * (all zeros).
 784                  */
 785                 memcpy(scan_cfg_out->specific_bssid,
 786                        user_scan_in->specific_bssid,
 787                        sizeof(scan_cfg_out->specific_bssid));
 788
 789                 for (i = 0; i < user_scan_in->num_ssids; i++) {
 790                         ssid_len = user_scan_in->ssid_list[i].ssid_len;
 791
 792                         wildcard_ssid_tlv =
 793                                 (struct mwifiex_ie_types_wildcard_ssid_params *)
 794                                 tlv_pos;
 795                         wildcard_ssid_tlv->header.type =
 796                                 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
 797                         wildcard_ssid_tlv->header.len = cpu_to_le16(
 798                                 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
 799                                                          max_ssid_length)));
 800
 801                         /*
 802                          * max_ssid_length = 0 tells firmware to perform
 803                          * specific scan for the SSID filled, whereas
 804                          * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
 805                          * wildcard scan.
 806                          */
 807                         if (ssid_len)
 808                                 wildcard_ssid_tlv->max_ssid_length = 0;
 809                         else
 810                                 wildcard_ssid_tlv->max_ssid_length =
 811                                                         IEEE80211_MAX_SSID_LEN;
 812
 813                         memcpy(wildcard_ssid_tlv->ssid,
 814                                user_scan_in->ssid_list[i].ssid, ssid_len);
 815
 816                         tlv_pos += (sizeof(wildcard_ssid_tlv->header)
 817                                 + le16_to_cpu(wildcard_ssid_tlv->header.len));
 818
 819                         dev_dbg(adapter->dev, "info: scan: ssid[%d]: %s, %d\n",
 820                                 i, wildcard_ssid_tlv->ssid,
 821                                 wildcard_ssid_tlv->max_ssid_length);
 822
 823                         /* Empty wildcard ssid with a maxlen will match many or
 824                            potentially all SSIDs (maxlen == 32), therefore do
 825                            not treat the scan as
 826                            filtered. */
 827                         if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
 828                                 ssid_filter = false;
 829                 }
 830
 831                 /*
 832                  *  The default number of channels sent in the command is low to
 833                  *  ensure the response buffer from the firmware does not
 834                  *  truncate scan results.  That is not an issue with an SSID
 835                  *  or BSSID filter applied to the scan results in the firmware.
 836                  */
 837                 if ((i && ssid_filter) ||
 838                     memcmp(scan_cfg_out->specific_bssid, &zero_mac,
 839                            sizeof(zero_mac)))
 840                         *filtered_scan = true;
 841         } else {
 842                 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
 843                 num_probes = adapter->scan_probes;
 844         }
 845
 846         /*
 847          *  If a specific BSSID or SSID is used, the number of channels in the
 848          *  scan command will be increased to the absolute maximum.
 849          */
 850         if (*filtered_scan)
 851                 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
 852         else
 853                 *max_chan_per_scan = MWIFIEX_CHANNELS_PER_SCAN_CMD;
 854
 855         /* If the input config or adapter has the number of Probes set,
 856            add tlv */
 857         if (num_probes) {
 858
 859                 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
 860                         num_probes);
 861
 862                 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
 863                 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
 864                 num_probes_tlv->header.len =
 865                         cpu_to_le16(sizeof(num_probes_tlv->num_probes));
 866                 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
 867
 868                 tlv_pos += sizeof(num_probes_tlv->header) +
 869                         le16_to_cpu(num_probes_tlv->header.len);
 870
 871         }
 872
 873         /* Append rates tlv */
 874         memset(rates, 0, sizeof(rates));
 875
 876         rates_size = mwifiex_get_supported_rates(priv, rates);
 877
 878         rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos;
 879         rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
 880         rates_tlv->header.len = cpu_to_le16((u16) rates_size);
 881         memcpy(rates_tlv->rates, rates, rates_size);
 882         tlv_pos += sizeof(rates_tlv->header) + rates_size;
 883
 884         dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size);
 885
 886         if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
 887             (priv->adapter->config_bands & BAND_GN ||
 888              priv->adapter->config_bands & BAND_AN)) {
 889                 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
 890                 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
 891                 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
 892                 ht_cap->header.len =
 893                                 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
 894                 radio_type =
 895                         mwifiex_band_to_radio_type(priv->adapter->config_bands);
 896                 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
 897                 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
 898         }
 899
 900         /* Append vendor specific IE TLV */
 901         mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
 902
 903         /*
 904          * Set the output for the channel TLV to the address in the tlv buffer
 905          *   past any TLVs that were added in this function (SSID, num_probes).
 906          *   Channel TLVs will be added past this for each scan command,
 907          *   preserving the TLVs that were previously added.
 908          */
 909         *chan_list_out =
 910                 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
 911
 912         if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
 913
 914                 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
 915
 916                 for (chan_idx = 0;
 917                      chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
 918                      user_scan_in->chan_list[chan_idx].chan_number;
 919                      chan_idx++) {
 920
 921                         channel = user_scan_in->chan_list[chan_idx].chan_number;
 922                         (scan_chan_list + chan_idx)->chan_number = channel;
 923
 924                         radio_type =
 925                                 user_scan_in->chan_list[chan_idx].radio_type;
 926                         (scan_chan_list + chan_idx)->radio_type = radio_type;
 927
 928                         scan_type = user_scan_in->chan_list[chan_idx].scan_type;
 929
 930                         if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
 931                                 (scan_chan_list +
 932                                  chan_idx)->chan_scan_mode_bitmap
 933                                         |= MWIFIEX_PASSIVE_SCAN;
 934                         else
 935                                 (scan_chan_list +
 936                                  chan_idx)->chan_scan_mode_bitmap
 937                                         &= ~MWIFIEX_PASSIVE_SCAN;
 938
 939                         if (user_scan_in->chan_list[chan_idx].scan_time) {
 940                                 scan_dur = (u16) user_scan_in->
 941                                         chan_list[chan_idx].scan_time;
 942                         } else {
 943                                 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
 944                                         scan_dur = adapter->passive_scan_time;
 945                                 else if (*filtered_scan)
 946                                         scan_dur = adapter->specific_scan_time;
 947                                 else
 948                                         scan_dur = adapter->active_scan_time;
 949                         }
 950
 951                         (scan_chan_list + chan_idx)->min_scan_time =
 952                                 cpu_to_le16(scan_dur);
 953                         (scan_chan_list + chan_idx)->max_scan_time =
 954                                 cpu_to_le16(scan_dur);
 955                 }
 956
 957                 /* Check if we are only scanning the current channel */
 958                 if ((chan_idx == 1) &&
 959                     (user_scan_in->chan_list[0].chan_number ==
 960                      priv->curr_bss_params.bss_descriptor.channel)) {
 961                         *scan_current_only = true;
 962                         dev_dbg(adapter->dev,
 963                                 "info: Scan: Scanning current channel only\n");
 964                 }
 965
 966         } else {
 967                 dev_dbg(adapter->dev,
 968                         "info: Scan: Creating full region channel list\n");
 969                 mwifiex_scan_create_channel_list(priv, user_scan_in,
 970                                                  scan_chan_list,
 971                                                  *filtered_scan);
 972         }
 973 }
 974
 975 /*
 976  * This function inspects the scan response buffer for pointers to
 977  * expected TLVs.
 978  *
 979  * TLVs can be included at the end of the scan response BSS information.
 980  *
 981  * Data in the buffer is parsed pointers to TLVs that can potentially
 982  * be passed back in the response.
 983  */
 984 static void
 985 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
 986                                      struct mwifiex_ie_types_data *tlv,
 987                                      u32 tlv_buf_size, u32 req_tlv_type,
 988                                      struct mwifiex_ie_types_data **tlv_data)
 989 {
 990         struct mwifiex_ie_types_data *current_tlv;
 991         u32 tlv_buf_left;
 992         u32 tlv_type;
 993         u32 tlv_len;
 994
 995         current_tlv = tlv;
 996         tlv_buf_left = tlv_buf_size;
 997         *tlv_data = NULL;
 998
 999         dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
1000                 tlv_buf_size);
1001
1002         while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1003
1004                 tlv_type = le16_to_cpu(current_tlv->header.type);
1005                 tlv_len = le16_to_cpu(current_tlv->header.len);
1006
1007                 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1008                         dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1009                         break;
1010                 }
1011
1012                 if (req_tlv_type == tlv_type) {
1013                         switch (tlv_type) {
1014                         case TLV_TYPE_TSFTIMESTAMP:
1015                                 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1016                                         "timestamp TLV, len = %d\n", tlv_len);
1017                                 *tlv_data = (struct mwifiex_ie_types_data *)
1018                                         current_tlv;
1019                                 break;
1020                         case TLV_TYPE_CHANNELBANDLIST:
1021                                 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1022                                         " band list TLV, len = %d\n", tlv_len);
1023                                 *tlv_data = (struct mwifiex_ie_types_data *)
1024                                         current_tlv;
1025                                 break;
1026                         default:
1027                                 dev_err(adapter->dev,
1028                                         "SCAN_RESP: unhandled TLV = %d\n",
1029                                        tlv_type);
1030                                 /* Give up, this seems corrupted */
1031                                 return;
1032                         }
1033                 }
1034
1035                 if (*tlv_data)
1036                         break;
1037
1038
1039                 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1040                 current_tlv =
1041                         (struct mwifiex_ie_types_data *) (current_tlv->data +
1042                                                           tlv_len);
1043
1044         }                       /* while */
1045 }
1046
1047 /*
1048  * This function parses provided beacon buffer and updates
1049  * respective fields in bss descriptor structure.
1050  */
1051 int
1052 mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1053                                 struct mwifiex_bssdescriptor *bss_entry,
1054                                 u8 *ie_buf, u32 ie_len)
1055 {
1056         int ret = 0;
1057         u8 element_id;
1058         struct ieee_types_fh_param_set *fh_param_set;
1059         struct ieee_types_ds_param_set *ds_param_set;
1060         struct ieee_types_cf_param_set *cf_param_set;
1061         struct ieee_types_ibss_param_set *ibss_param_set;
1062         u8 *current_ptr;
1063         u8 *rate;
1064         u8 element_len;
1065         u16 total_ie_len;
1066         u8 bytes_to_copy;
1067         u8 rate_size;
1068         u8 found_data_rate_ie;
1069         u32 bytes_left;
1070         struct ieee_types_vendor_specific *vendor_ie;
1071         const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1072         const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1073
1074         found_data_rate_ie = false;
1075         rate_size = 0;
1076         current_ptr = ie_buf;
1077         bytes_left = ie_len;
1078         bss_entry->beacon_buf = ie_buf;
1079         bss_entry->beacon_buf_size = ie_len;
1080
1081         /* Process variable IE */
1082         while (bytes_left >= 2) {
1083                 element_id = *current_ptr;
1084                 element_len = *(current_ptr + 1);
1085                 total_ie_len = element_len + sizeof(struct ieee_types_header);
1086
1087                 if (bytes_left < total_ie_len) {
1088                         dev_err(adapter->dev, "err: InterpretIE: in processing"
1089                                 " IE, bytes left < IE length\n");
1090                         return -1;
1091                 }
1092                 switch (element_id) {
1093                 case WLAN_EID_SSID:
1094                         bss_entry->ssid.ssid_len = element_len;
1095                         memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1096                                element_len);
1097                         dev_dbg(adapter->dev,
1098                                 "info: InterpretIE: ssid: %-32s\n",
1099                                 bss_entry->ssid.ssid);
1100                         break;
1101
1102                 case WLAN_EID_SUPP_RATES:
1103                         memcpy(bss_entry->data_rates, current_ptr + 2,
1104                                element_len);
1105                         memcpy(bss_entry->supported_rates, current_ptr + 2,
1106                                element_len);
1107                         rate_size = element_len;
1108                         found_data_rate_ie = true;
1109                         break;
1110
1111                 case WLAN_EID_FH_PARAMS:
1112                         fh_param_set =
1113                                 (struct ieee_types_fh_param_set *) current_ptr;
1114                         memcpy(&bss_entry->phy_param_set.fh_param_set,
1115                                fh_param_set,
1116                                sizeof(struct ieee_types_fh_param_set));
1117                         break;
1118
1119                 case WLAN_EID_DS_PARAMS:
1120                         ds_param_set =
1121                                 (struct ieee_types_ds_param_set *) current_ptr;
1122
1123                         bss_entry->channel = ds_param_set->current_chan;
1124
1125                         memcpy(&bss_entry->phy_param_set.ds_param_set,
1126                                ds_param_set,
1127                                sizeof(struct ieee_types_ds_param_set));
1128                         break;
1129
1130                 case WLAN_EID_CF_PARAMS:
1131                         cf_param_set =
1132                                 (struct ieee_types_cf_param_set *) current_ptr;
1133                         memcpy(&bss_entry->ss_param_set.cf_param_set,
1134                                cf_param_set,
1135                                sizeof(struct ieee_types_cf_param_set));
1136                         break;
1137
1138                 case WLAN_EID_IBSS_PARAMS:
1139                         ibss_param_set =
1140                                 (struct ieee_types_ibss_param_set *)
1141                                 current_ptr;
1142                         memcpy(&bss_entry->ss_param_set.ibss_param_set,
1143                                ibss_param_set,
1144                                sizeof(struct ieee_types_ibss_param_set));
1145                         break;
1146
1147                 case WLAN_EID_ERP_INFO:
1148                         bss_entry->erp_flags = *(current_ptr + 2);
1149                         break;
1150
1151                 case WLAN_EID_EXT_SUPP_RATES:
1152                         /*
1153                          * Only process extended supported rate
1154                          * if data rate is already found.
1155                          * Data rate IE should come before
1156                          * extended supported rate IE
1157                          */
1158                         if (found_data_rate_ie) {
1159                                 if ((element_len + rate_size) >
1160                                     MWIFIEX_SUPPORTED_RATES)
1161                                         bytes_to_copy =
1162                                                 (MWIFIEX_SUPPORTED_RATES -
1163                                                  rate_size);
1164                                 else
1165                                         bytes_to_copy = element_len;
1166
1167                                 rate = (u8 *) bss_entry->data_rates;
1168                                 rate += rate_size;
1169                                 memcpy(rate, current_ptr + 2, bytes_to_copy);
1170
1171                                 rate = (u8 *) bss_entry->supported_rates;
1172                                 rate += rate_size;
1173                                 memcpy(rate, current_ptr + 2, bytes_to_copy);
1174                         }
1175                         break;
1176
1177                 case WLAN_EID_VENDOR_SPECIFIC:
1178                         vendor_ie = (struct ieee_types_vendor_specific *)
1179                                         current_ptr;
1180
1181                         if (!memcmp
1182                             (vendor_ie->vend_hdr.oui, wpa_oui,
1183                              sizeof(wpa_oui))) {
1184                                 bss_entry->bcn_wpa_ie =
1185                                         (struct ieee_types_vendor_specific *)
1186                                         current_ptr;
1187                                 bss_entry->wpa_offset = (u16)
1188                                         (current_ptr - bss_entry->beacon_buf);
1189                         } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1190                                     sizeof(wmm_oui))) {
1191                                 if (total_ie_len ==
1192                                     sizeof(struct ieee_types_wmm_parameter) ||
1193                                     total_ie_len ==
1194                                     sizeof(struct ieee_types_wmm_info))
1195                                         /*
1196                                          * Only accept and copy the WMM IE if
1197                                          * it matches the size expected for the
1198                                          * WMM Info IE or the WMM Parameter IE.
1199                                          */
1200                                         memcpy((u8 *) &bss_entry->wmm_ie,
1201                                                current_ptr, total_ie_len);
1202                         }
1203                         break;
1204                 case WLAN_EID_RSN:
1205                         bss_entry->bcn_rsn_ie =
1206                                 (struct ieee_types_generic *) current_ptr;
1207                         bss_entry->rsn_offset = (u16) (current_ptr -
1208                                                         bss_entry->beacon_buf);
1209                         break;
1210                 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1211                         bss_entry->bcn_wapi_ie =
1212                                 (struct ieee_types_generic *) current_ptr;
1213                         bss_entry->wapi_offset = (u16) (current_ptr -
1214                                                         bss_entry->beacon_buf);
1215                         break;
1216                 case WLAN_EID_HT_CAPABILITY:
1217                         bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1218                                         (current_ptr +
1219                                         sizeof(struct ieee_types_header));
1220                         bss_entry->ht_cap_offset = (u16) (current_ptr +
1221                                         sizeof(struct ieee_types_header) -
1222                                         bss_entry->beacon_buf);
1223                         break;
1224                 case WLAN_EID_HT_INFORMATION:
1225                         bss_entry->bcn_ht_info = (struct ieee80211_ht_info *)
1226                                         (current_ptr +
1227                                         sizeof(struct ieee_types_header));
1228                         bss_entry->ht_info_offset = (u16) (current_ptr +
1229                                         sizeof(struct ieee_types_header) -
1230                                         bss_entry->beacon_buf);
1231                         break;
1232                 case WLAN_EID_BSS_COEX_2040:
1233                         bss_entry->bcn_bss_co_2040 = (u8 *) (current_ptr +
1234                                         sizeof(struct ieee_types_header));
1235                         bss_entry->bss_co_2040_offset = (u16) (current_ptr +
1236                                         sizeof(struct ieee_types_header) -
1237                                                 bss_entry->beacon_buf);
1238                         break;
1239                 case WLAN_EID_EXT_CAPABILITY:
1240                         bss_entry->bcn_ext_cap = (u8 *) (current_ptr +
1241                                         sizeof(struct ieee_types_header));
1242                         bss_entry->ext_cap_offset = (u16) (current_ptr +
1243                                         sizeof(struct ieee_types_header) -
1244                                         bss_entry->beacon_buf);
1245                         break;
1246                 default:
1247                         break;
1248                 }
1249
1250                 current_ptr += element_len + 2;
1251
1252                 /* Need to account for IE ID and IE Len */
1253                 bytes_left -= (element_len + 2);
1254
1255         }       /* while (bytes_left > 2) */
1256         return ret;
1257 }
1258
1259 /*
1260  * This function converts radio type scan parameter to a band configuration
1261  * to be used in join command.
1262  */
1263 static u8
1264 mwifiex_radio_type_to_band(u8 radio_type)
1265 {
1266         switch (radio_type) {
1267         case HostCmd_SCAN_RADIO_TYPE_A:
1268                 return BAND_A;
1269         case HostCmd_SCAN_RADIO_TYPE_BG:
1270         default:
1271                 return BAND_G;
1272         }
1273 }
1274
1275 /*
1276  * This is an internal function used to start a scan based on an input
1277  * configuration.
1278  *
1279  * This uses the input user scan configuration information when provided in
1280  * order to send the appropriate scan commands to firmware to populate or
1281  * update the internal driver scan table.
1282  */
1283 static int mwifiex_scan_networks(struct mwifiex_private *priv,
1284                 const struct mwifiex_user_scan_cfg *user_scan_in)
1285 {
1286         int ret = 0;
1287         struct mwifiex_adapter *adapter = priv->adapter;
1288         struct cmd_ctrl_node *cmd_node;
1289         union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
1290         struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1291         u32 buf_size;
1292         struct mwifiex_chan_scan_param_set *scan_chan_list;
1293         u8 filtered_scan;
1294         u8 scan_current_chan_only;
1295         u8 max_chan_per_scan;
1296         unsigned long flags;
1297
1298         if (adapter->scan_processing) {
1299                 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1300                 return ret;
1301         }
1302
1303         spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1304         adapter->scan_processing = true;
1305         spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1306
1307         if (priv->scan_block) {
1308                 dev_dbg(adapter->dev,
1309                         "cmd: Scan is blocked during association...\n");
1310                 return ret;
1311         }
1312
1313         scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
1314                                                                 GFP_KERNEL);
1315         if (!scan_cfg_out) {
1316                 dev_err(adapter->dev, "failed to alloc scan_cfg_out\n");
1317                 return -ENOMEM;
1318         }
1319
1320         buf_size = sizeof(struct mwifiex_chan_scan_param_set) *
1321                                                 MWIFIEX_USER_SCAN_CHAN_MAX;
1322         scan_chan_list = kzalloc(buf_size, GFP_KERNEL);
1323         if (!scan_chan_list) {
1324                 dev_err(adapter->dev, "failed to alloc scan_chan_list\n");
1325                 kfree(scan_cfg_out);
1326                 return -ENOMEM;
1327         }
1328
1329         mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
1330                             &chan_list_out, scan_chan_list, &max_chan_per_scan,
1331                             &filtered_scan, &scan_current_chan_only);
1332
1333         ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1334                                         &scan_cfg_out->config, chan_list_out,
1335                                         scan_chan_list);
1336
1337         /* Get scan command from scan_pending_q and put to cmd_pending_q */
1338         if (!ret) {
1339                 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1340                 if (!list_empty(&adapter->scan_pending_q)) {
1341                         cmd_node = list_first_entry(&adapter->scan_pending_q,
1342                                                     struct cmd_ctrl_node, list);
1343                         list_del(&cmd_node->list);
1344                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1345                                                flags);
1346                         adapter->cmd_queued = cmd_node;
1347                         mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1348                                                         true);
1349                 } else {
1350                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1351                                                flags);
1352                 }
1353         } else {
1354                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1355                 adapter->scan_processing = true;
1356                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1357         }
1358
1359         kfree(scan_cfg_out);
1360         kfree(scan_chan_list);
1361         return ret;
1362 }
1363
1364 /*
1365  * Sends IOCTL request to start a scan with user configurations.
1366  *
1367  * This function allocates the IOCTL request buffer, fills it
1368  * with requisite parameters and calls the IOCTL handler.
1369  *
1370  * Upon completion, it also generates a wireless event to notify
1371  * applications.
1372  */
1373 int mwifiex_set_user_scan_ioctl(struct mwifiex_private *priv,
1374                                 struct mwifiex_user_scan_cfg *scan_req)
1375 {
1376         int status;
1377
1378         status = mwifiex_scan_networks(priv, scan_req);
1379         queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
1380
1381         return status;
1382 }
1383
1384 /*
1385  * This function prepares a scan command to be sent to the firmware.
1386  *
1387  * This uses the scan command configuration sent to the command processing
1388  * module in command preparation stage to configure a scan command structure
1389  * to send to firmware.
1390  *
1391  * The fixed fields specifying the BSS type and BSSID filters as well as a
1392  * variable number/length of TLVs are sent in the command to firmware.
1393  *
1394  * Preparation also includes -
1395  *      - Setting command ID, and proper size
1396  *      - Ensuring correct endian-ness
1397  */
1398 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1399                             struct mwifiex_scan_cmd_config *scan_cfg)
1400 {
1401         struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
1402
1403         /* Set fixed field variables in scan command */
1404         scan_cmd->bss_mode = scan_cfg->bss_mode;
1405         memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1406                sizeof(scan_cmd->bssid));
1407         memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1408
1409         cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1410
1411         /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1412         cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1413                                           + sizeof(scan_cmd->bssid)
1414                                           + scan_cfg->tlv_buf_len + S_DS_GEN));
1415
1416         return 0;
1417 }
1418
1419 /*
1420  * This function checks compatibility of requested network with current
1421  * driver settings.
1422  */
1423 int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1424                                         struct mwifiex_bssdescriptor *bss_desc)
1425 {
1426         int ret = -1;
1427
1428         if (!bss_desc)
1429                 return -1;
1430
1431         if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1432                              (u16) bss_desc->channel, 0))) {
1433                 switch (priv->bss_mode) {
1434                 case NL80211_IFTYPE_STATION:
1435                 case NL80211_IFTYPE_ADHOC:
1436                         ret = mwifiex_is_network_compatible(priv, bss_desc,
1437                                                             priv->bss_mode);
1438                         if (ret)
1439                                 dev_err(priv->adapter->dev, "cannot find ssid "
1440                                         "%s\n", bss_desc->ssid.ssid);
1441                                 break;
1442                 default:
1443                                 ret = 0;
1444                 }
1445         }
1446
1447         return ret;
1448 }
1449
1450 static int
1451 mwifiex_update_curr_bss_params(struct mwifiex_private *priv, u8 *bssid,
1452                                s32 rssi, const u8 *ie_buf, size_t ie_len,
1453                                u16 beacon_period, u16 cap_info_bitmap, u8 band)
1454 {
1455         struct mwifiex_bssdescriptor *bss_desc;
1456         int ret;
1457         unsigned long flags;
1458         u8 *beacon_ie;
1459
1460         /* Allocate and fill new bss descriptor */
1461         bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor),
1462                         GFP_KERNEL);
1463         if (!bss_desc) {
1464                 dev_err(priv->adapter->dev, " failed to alloc bss_desc\n");
1465                 return -ENOMEM;
1466         }
1467
1468         beacon_ie = kmemdup(ie_buf, ie_len, GFP_KERNEL);
1469         if (!beacon_ie) {
1470                 kfree(bss_desc);
1471                 dev_err(priv->adapter->dev, " failed to alloc beacon_ie\n");
1472                 return -ENOMEM;
1473         }
1474
1475         ret = mwifiex_fill_new_bss_desc(priv, bssid, rssi, beacon_ie,
1476                                         ie_len, beacon_period,
1477                                         cap_info_bitmap, band, bss_desc);
1478         if (ret)
1479                 goto done;
1480
1481         ret = mwifiex_check_network_compatibility(priv, bss_desc);
1482         if (ret)
1483                 goto done;
1484
1485         /* Update current bss descriptor parameters */
1486         spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1487         priv->curr_bss_params.bss_descriptor.bcn_wpa_ie = NULL;
1488         priv->curr_bss_params.bss_descriptor.wpa_offset = 0;
1489         priv->curr_bss_params.bss_descriptor.bcn_rsn_ie = NULL;
1490         priv->curr_bss_params.bss_descriptor.rsn_offset = 0;
1491         priv->curr_bss_params.bss_descriptor.bcn_wapi_ie = NULL;
1492         priv->curr_bss_params.bss_descriptor.wapi_offset = 0;
1493         priv->curr_bss_params.bss_descriptor.bcn_ht_cap = NULL;
1494         priv->curr_bss_params.bss_descriptor.ht_cap_offset =
1495                 0;
1496         priv->curr_bss_params.bss_descriptor.bcn_ht_info = NULL;
1497         priv->curr_bss_params.bss_descriptor.ht_info_offset =
1498                 0;
1499         priv->curr_bss_params.bss_descriptor.bcn_bss_co_2040 =
1500                 NULL;
1501         priv->curr_bss_params.bss_descriptor.
1502                 bss_co_2040_offset = 0;
1503         priv->curr_bss_params.bss_descriptor.bcn_ext_cap = NULL;
1504         priv->curr_bss_params.bss_descriptor.ext_cap_offset = 0;
1505         priv->curr_bss_params.bss_descriptor.beacon_buf = NULL;
1506         priv->curr_bss_params.bss_descriptor.beacon_buf_size =
1507                 0;
1508
1509         /* Make a copy of current BSSID descriptor */
1510         memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
1511                sizeof(priv->curr_bss_params.bss_descriptor));
1512         mwifiex_save_curr_bcn(priv);
1513         spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1514
1515 done:
1516         kfree(bss_desc);
1517         kfree(beacon_ie);
1518         return 0;
1519 }
1520
1521 /*
1522  * This function handles the command response of scan.
1523  *
1524  * The response buffer for the scan command has the following
1525  * memory layout:
1526  *
1527  *      .-------------------------------------------------------------.
1528  *      |  Header (4 * sizeof(t_u16)):  Standard command response hdr |
1529  *      .-------------------------------------------------------------.
1530  *      |  BufSize (t_u16) : sizeof the BSS Description data          |
1531  *      .-------------------------------------------------------------.
1532  *      |  NumOfSet (t_u8) : Number of BSS Descs returned             |
1533  *      .-------------------------------------------------------------.
1534  *      |  BSSDescription data (variable, size given in BufSize)      |
1535  *      .-------------------------------------------------------------.
1536  *      |  TLV data (variable, size calculated using Header->Size,    |
1537  *      |            BufSize and sizeof the fixed fields above)       |
1538  *      .-------------------------------------------------------------.
1539  */
1540 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
1541                             struct host_cmd_ds_command *resp)
1542 {
1543         int ret = 0;
1544         struct mwifiex_adapter *adapter = priv->adapter;
1545         struct cmd_ctrl_node *cmd_node;
1546         struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
1547         struct mwifiex_ie_types_data *tlv_data;
1548         struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1549         u8 *bss_info;
1550         u32 scan_resp_size;
1551         u32 bytes_left;
1552         u32 idx;
1553         u32 tlv_buf_size;
1554         struct mwifiex_chan_freq_power *cfp;
1555         struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1556         struct chan_band_param_set *chan_band;
1557         u8 is_bgscan_resp;
1558         unsigned long flags;
1559         struct cfg80211_bss *bss;
1560
1561         is_bgscan_resp = (le16_to_cpu(resp->command)
1562                           == HostCmd_CMD_802_11_BG_SCAN_QUERY);
1563         if (is_bgscan_resp)
1564                 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1565         else
1566                 scan_rsp = &resp->params.scan_resp;
1567
1568
1569         if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
1570                 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
1571                         scan_rsp->number_of_sets);
1572                 ret = -1;
1573                 goto done;
1574         }
1575
1576         bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1577         dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
1578                 bytes_left);
1579
1580         scan_resp_size = le16_to_cpu(resp->size);
1581
1582         dev_dbg(adapter->dev,
1583                 "info: SCAN_RESP: returned %d APs before parsing\n",
1584                 scan_rsp->number_of_sets);
1585
1586         bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1587
1588         /*
1589          * The size of the TLV buffer is equal to the entire command response
1590          *   size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1591          *   BSS Descriptions (bss_descript_size as bytesLef) and the command
1592          *   response header (S_DS_GEN)
1593          */
1594         tlv_buf_size = scan_resp_size - (bytes_left
1595                                          + sizeof(scan_rsp->bss_descript_size)
1596                                          + sizeof(scan_rsp->number_of_sets)
1597                                          + S_DS_GEN);
1598
1599         tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1600                                                  bss_desc_and_tlv_buffer +
1601                                                  bytes_left);
1602
1603         /* Search the TLV buffer space in the scan response for any valid
1604            TLVs */
1605         mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1606                                              TLV_TYPE_TSFTIMESTAMP,
1607                                              (struct mwifiex_ie_types_data **)
1608                                              &tsf_tlv);
1609
1610         /* Search the TLV buffer space in the scan response for any valid
1611            TLVs */
1612         mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1613                                              TLV_TYPE_CHANNELBANDLIST,
1614                                              (struct mwifiex_ie_types_data **)
1615                                              &chan_band_tlv);
1616
1617         for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
1618                 u8 bssid[ETH_ALEN];
1619                 s32 rssi;
1620                 const u8 *ie_buf;
1621                 size_t ie_len;
1622                 u16 channel = 0;
1623                 u64 network_tsf = 0;
1624                 u16 beacon_size = 0;
1625                 u32 curr_bcn_bytes;
1626                 u32 freq;
1627                 u16 beacon_period;
1628                 u16 cap_info_bitmap;
1629                 u8 *current_ptr;
1630                 struct mwifiex_bcn_param *bcn_param;
1631
1632                 if (bytes_left >= sizeof(beacon_size)) {
1633                         /* Extract & convert beacon size from command buffer */
1634                         memcpy(&beacon_size, bss_info, sizeof(beacon_size));
1635                         bytes_left -= sizeof(beacon_size);
1636                         bss_info += sizeof(beacon_size);
1637                 }
1638
1639                 if (!beacon_size || beacon_size > bytes_left) {
1640                         bss_info += bytes_left;
1641                         bytes_left = 0;
1642                         return -1;
1643                 }
1644
1645                 /* Initialize the current working beacon pointer for this BSS
1646                  * iteration */
1647                 current_ptr = bss_info;
1648
1649                 /* Advance the return beacon pointer past the current beacon */
1650                 bss_info += beacon_size;
1651                 bytes_left -= beacon_size;
1652
1653                 curr_bcn_bytes = beacon_size;
1654
1655                 /*
1656                  * First 5 fields are bssid, RSSI, time stamp, beacon interval,
1657                  *   and capability information
1658                  */
1659                 if (curr_bcn_bytes < sizeof(struct mwifiex_bcn_param)) {
1660                         dev_err(adapter->dev,
1661                                 "InterpretIE: not enough bytes left\n");
1662                         continue;
1663                 }
1664                 bcn_param = (struct mwifiex_bcn_param *)current_ptr;
1665                 current_ptr += sizeof(*bcn_param);
1666                 curr_bcn_bytes -= sizeof(*bcn_param);
1667
1668                 memcpy(bssid, bcn_param->bssid, ETH_ALEN);
1669
1670                 rssi = (s32) (bcn_param->rssi);
1671                 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%02X\n", rssi);
1672
1673                 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1674
1675                 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1676                 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
1677                         cap_info_bitmap);
1678
1679                 /* Rest of the current buffer are IE's */
1680                 ie_buf = current_ptr;
1681                 ie_len = curr_bcn_bytes;
1682                 dev_dbg(adapter->dev,
1683                         "info: InterpretIE: IELength for this AP = %d\n",
1684                         curr_bcn_bytes);
1685
1686                 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1687                         u8 element_id, element_len;
1688
1689                         element_id = *current_ptr;
1690                         element_len = *(current_ptr + 1);
1691                         if (curr_bcn_bytes < element_len +
1692                                         sizeof(struct ieee_types_header)) {
1693                                 dev_err(priv->adapter->dev,
1694                                         "%s: bytes left < IE length\n",
1695                                         __func__);
1696                                 goto done;
1697                         }
1698                         if (element_id == WLAN_EID_DS_PARAMS) {
1699                                 channel = *(u8 *) (current_ptr +
1700                                         sizeof(struct ieee_types_header));
1701                                 break;
1702                         }
1703
1704                         current_ptr += element_len +
1705                                         sizeof(struct ieee_types_header);
1706                         curr_bcn_bytes -= element_len +
1707                                         sizeof(struct ieee_types_header);
1708                 }
1709
1710                 /*
1711                  * If the TSF TLV was appended to the scan results, save this
1712                  * entry's TSF value in the networkTSF field.The networkTSF is
1713                  * the firmware's TSF value at the time the beacon or probe
1714                  * response was received.
1715                  */
1716                 if (tsf_tlv)
1717                         memcpy(&network_tsf,
1718                                &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1719                                sizeof(network_tsf));
1720
1721                 if (channel) {
1722                         struct ieee80211_channel *chan;
1723                         u8 band;
1724
1725                         band = BAND_G;
1726                         if (chan_band_tlv) {
1727                                 chan_band =
1728                                         &chan_band_tlv->chan_band_param[idx];
1729                                 band = mwifiex_radio_type_to_band(
1730                                                 chan_band->radio_type
1731                                                 & (BIT(0) | BIT(1)));
1732                         }
1733
1734                         cfp = mwifiex_get_cfp(priv, band, channel, 0);
1735
1736                         freq = cfp ? cfp->freq : 0;
1737
1738                         chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
1739
1740                         if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
1741                                 bss = cfg80211_inform_bss(priv->wdev->wiphy,
1742                                               chan, bssid, network_tsf,
1743                                               cap_info_bitmap, beacon_period,
1744                                               ie_buf, ie_len, rssi, GFP_KERNEL);
1745                                 *(u8 *)bss->priv = band;
1746                                 cfg80211_put_bss(bss);
1747
1748                                 if (priv->media_connected &&
1749                                     !memcmp(bssid,
1750                                             priv->curr_bss_params.bss_descriptor
1751                                             .mac_address, ETH_ALEN))
1752                                         mwifiex_update_curr_bss_params
1753                                                         (priv, bssid, rssi,
1754                                                          ie_buf, ie_len,
1755                                                          beacon_period,
1756                                                          cap_info_bitmap, band);
1757                         }
1758                 } else {
1759                         dev_dbg(adapter->dev, "missing BSS channel IE\n");
1760                 }
1761         }
1762
1763         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1764         if (list_empty(&adapter->scan_pending_q)) {
1765                 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1766                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1767                 adapter->scan_processing = false;
1768                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1769
1770                 /* Need to indicate IOCTL complete */
1771                 if (adapter->curr_cmd->wait_q_enabled) {
1772                         adapter->cmd_wait_q.status = 0;
1773                         mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1774                 }
1775                 if (priv->report_scan_result)
1776                         priv->report_scan_result = false;
1777                 if (priv->scan_pending_on_block) {
1778                         priv->scan_pending_on_block = false;
1779                         up(&priv->async_sem);
1780                 }
1781
1782                 if (priv->user_scan_cfg) {
1783                         dev_dbg(priv->adapter->dev,
1784                                 "info: %s: sending scan results\n", __func__);
1785                         cfg80211_scan_done(priv->scan_request, 0);
1786                         priv->scan_request = NULL;
1787                         kfree(priv->user_scan_cfg);
1788                         priv->user_scan_cfg = NULL;
1789                 }
1790         } else {
1791                 /* Get scan command from scan_pending_q and put to
1792                    cmd_pending_q */
1793                 cmd_node = list_first_entry(&adapter->scan_pending_q,
1794                                             struct cmd_ctrl_node, list);
1795                 list_del(&cmd_node->list);
1796                 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1797
1798                 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
1799         }
1800
1801 done:
1802         return ret;
1803 }
1804
1805 /*
1806  * This function prepares command for background scan query.
1807  *
1808  * Preparation includes -
1809  *      - Setting command ID and proper size
1810  *      - Setting background scan flush parameter
1811  *      - Ensuring correct endian-ness
1812  */
1813 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
1814 {
1815         struct host_cmd_ds_802_11_bg_scan_query *bg_query =
1816                 &cmd->params.bg_scan_query;
1817
1818         cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
1819         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
1820                                 + S_DS_GEN);
1821
1822         bg_query->flush = 1;
1823
1824         return 0;
1825 }
1826
1827 /*
1828  * This function inserts scan command node to the scan pending queue.
1829  */
1830 void
1831 mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
1832                        struct cmd_ctrl_node *cmd_node)
1833 {
1834         struct mwifiex_adapter *adapter = priv->adapter;
1835         unsigned long flags;
1836
1837         cmd_node->wait_q_enabled = true;
1838         cmd_node->condition = &adapter->scan_wait_q_woken;
1839         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1840         list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
1841         spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1842 }
1843
1844 /*
1845  * This function sends a scan command for all available channels to the
1846  * firmware, filtered on a specific SSID.
1847  */
1848 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
1849                                       struct cfg80211_ssid *req_ssid)
1850 {
1851         struct mwifiex_adapter *adapter = priv->adapter;
1852         int ret = 0;
1853         struct mwifiex_user_scan_cfg *scan_cfg;
1854
1855         if (!req_ssid)
1856                 return -1;
1857
1858         if (adapter->scan_processing) {
1859                 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1860                 return ret;
1861         }
1862
1863         if (priv->scan_block) {
1864                 dev_dbg(adapter->dev,
1865                         "cmd: Scan is blocked during association...\n");
1866                 return ret;
1867         }
1868
1869         scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
1870         if (!scan_cfg) {
1871                 dev_err(adapter->dev, "failed to alloc scan_cfg\n");
1872                 return -ENOMEM;
1873         }
1874
1875         scan_cfg->ssid_list = req_ssid;
1876         scan_cfg->num_ssids = 1;
1877
1878         ret = mwifiex_scan_networks(priv, scan_cfg);
1879
1880         kfree(scan_cfg);
1881         return ret;
1882 }
1883
1884 /*
1885  * Sends IOCTL request to start a scan.
1886  *
1887  * This function allocates the IOCTL request buffer, fills it
1888  * with requisite parameters and calls the IOCTL handler.
1889  *
1890  * Scan command can be issued for both normal scan and specific SSID
1891  * scan, depending upon whether an SSID is provided or not.
1892  */
1893 int mwifiex_request_scan(struct mwifiex_private *priv,
1894                          struct cfg80211_ssid *req_ssid)
1895 {
1896         int ret;
1897
1898         if (down_interruptible(&priv->async_sem)) {
1899                 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
1900                         __func__);
1901                 return -1;
1902         }
1903         priv->scan_pending_on_block = true;
1904
1905         priv->adapter->scan_wait_q_woken = false;
1906
1907         if (req_ssid && req_ssid->ssid_len != 0)
1908                 /* Specific SSID scan */
1909                 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
1910         else
1911                 /* Normal scan */
1912                 ret = mwifiex_scan_networks(priv, NULL);
1913
1914         if (!ret)
1915                 ret = mwifiex_wait_queue_complete(priv->adapter);
1916
1917         if (ret == -1) {
1918                 priv->scan_pending_on_block = false;
1919                 up(&priv->async_sem);
1920         }
1921
1922         return ret;
1923 }
1924
1925 /*
1926  * This function appends the vendor specific IE TLV to a buffer.
1927  */
1928 int
1929 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
1930                             u16 vsie_mask, u8 **buffer)
1931 {
1932         int id, ret_len = 0;
1933         struct mwifiex_ie_types_vendor_param_set *vs_param_set;
1934
1935         if (!buffer)
1936                 return 0;
1937         if (!(*buffer))
1938                 return 0;
1939
1940         /*
1941          * Traverse through the saved vendor specific IE array and append
1942          * the selected(scan/assoc/adhoc) IE as TLV to the command
1943          */
1944         for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
1945                 if (priv->vs_ie[id].mask & vsie_mask) {
1946                         vs_param_set =
1947                                 (struct mwifiex_ie_types_vendor_param_set *)
1948                                 *buffer;
1949                         vs_param_set->header.type =
1950                                 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
1951                         vs_param_set->header.len =
1952                                 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
1953                                 & 0x00FF) + 2);
1954                         memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
1955                                le16_to_cpu(vs_param_set->header.len));
1956                         *buffer += le16_to_cpu(vs_param_set->header.len) +
1957                                    sizeof(struct mwifiex_ie_types_header);
1958                         ret_len += le16_to_cpu(vs_param_set->header.len) +
1959                                    sizeof(struct mwifiex_ie_types_header);
1960                 }
1961         }
1962         return ret_len;
1963 }
1964
1965 /*
1966  * This function saves a beacon buffer of the current BSS descriptor.
1967  *
1968  * The current beacon buffer is saved so that it can be restored in the
1969  * following cases that makes the beacon buffer not to contain the current
1970  * ssid's beacon buffer.
1971  *      - The current ssid was not found somehow in the last scan.
1972  *      - The current ssid was the last entry of the scan table and overloaded.
1973  */
1974 void
1975 mwifiex_save_curr_bcn(struct mwifiex_private *priv)
1976 {
1977         struct mwifiex_bssdescriptor *curr_bss =
1978                 &priv->curr_bss_params.bss_descriptor;
1979
1980         if (!curr_bss->beacon_buf_size)
1981                 return;
1982
1983         /* allocate beacon buffer at 1st time; or if it's size has changed */
1984         if (!priv->curr_bcn_buf ||
1985             priv->curr_bcn_size != curr_bss->beacon_buf_size) {
1986                 priv->curr_bcn_size = curr_bss->beacon_buf_size;
1987
1988                 kfree(priv->curr_bcn_buf);
1989                 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
1990                                              GFP_ATOMIC);
1991                 if (!priv->curr_bcn_buf) {
1992                         dev_err(priv->adapter->dev,
1993                                 "failed to alloc curr_bcn_buf\n");
1994                         return;
1995                 }
1996         }
1997
1998         memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
1999                curr_bss->beacon_buf_size);
2000         dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
2001                 priv->curr_bcn_size);
2002
2003         curr_bss->beacon_buf = priv->curr_bcn_buf;
2004
2005         /* adjust the pointers in the current BSS descriptor */
2006         if (curr_bss->bcn_wpa_ie)
2007                 curr_bss->bcn_wpa_ie =
2008                         (struct ieee_types_vendor_specific *)
2009                         (curr_bss->beacon_buf +
2010                          curr_bss->wpa_offset);
2011
2012         if (curr_bss->bcn_rsn_ie)
2013                 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2014                         (curr_bss->beacon_buf +
2015                          curr_bss->rsn_offset);
2016
2017         if (curr_bss->bcn_ht_cap)
2018                 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2019                         (curr_bss->beacon_buf +
2020                          curr_bss->ht_cap_offset);
2021
2022         if (curr_bss->bcn_ht_info)
2023                 curr_bss->bcn_ht_info = (struct ieee80211_ht_info *)
2024                         (curr_bss->beacon_buf +
2025                          curr_bss->ht_info_offset);
2026
2027         if (curr_bss->bcn_bss_co_2040)
2028                 curr_bss->bcn_bss_co_2040 =
2029                         (u8 *) (curr_bss->beacon_buf +
2030                                         curr_bss->bss_co_2040_offset);
2031
2032         if (curr_bss->bcn_ext_cap)
2033                 curr_bss->bcn_ext_cap = (u8 *) (curr_bss->beacon_buf +
2034                                 curr_bss->ext_cap_offset);
2035 }
2036
2037 /*
2038  * This function frees the current BSS descriptor beacon buffer.
2039  */
2040 void
2041 mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2042 {
2043         kfree(priv->curr_bcn_buf);
2044         priv->curr_bcn_buf = NULL;
2045 }