drivers/staging/rtl8188eu/core/rtw_ieee80211.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  ******************************************************************************/
  15 #define _IEEE80211_C
  16
  17 #include <linux/ieee80211.h>
  18
  19 #include <drv_types.h>
  20 #include <osdep_intf.h>
  21 #include <ieee80211.h>
  22 #include <wifi.h>
  23 #include <osdep_service.h>
  24 #include <wlan_bssdef.h>
  25
  26 u8 RTW_WPA_OUI_TYPE[] = { 0x00, 0x50, 0xf2, 1 };
  27 u8 WPA_AUTH_KEY_MGMT_NONE[] = { 0x00, 0x50, 0xf2, 0 };
  28 u8 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x50, 0xf2, 1 };
  29 u8 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x50, 0xf2, 2 };
  30 u8 WPA_CIPHER_SUITE_NONE[] = { 0x00, 0x50, 0xf2, 0 };
  31 u8 WPA_CIPHER_SUITE_WEP40[] = { 0x00, 0x50, 0xf2, 1 };
  32 u8 WPA_CIPHER_SUITE_TKIP[] = { 0x00, 0x50, 0xf2, 2 };
  33 u8 WPA_CIPHER_SUITE_WRAP[] = { 0x00, 0x50, 0xf2, 3 };
  34 u8 WPA_CIPHER_SUITE_CCMP[] = { 0x00, 0x50, 0xf2, 4 };
  35 u8 WPA_CIPHER_SUITE_WEP104[] = { 0x00, 0x50, 0xf2, 5 };
  36
  37 u16 RSN_VERSION_BSD = 1;
  38 u8 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x0f, 0xac, 1 };
  39 u8 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x0f, 0xac, 2 };
  40 u8 RSN_CIPHER_SUITE_NONE[] = { 0x00, 0x0f, 0xac, 0 };
  41 u8 RSN_CIPHER_SUITE_WEP40[] = { 0x00, 0x0f, 0xac, 1 };
  42 u8 RSN_CIPHER_SUITE_TKIP[] = { 0x00, 0x0f, 0xac, 2 };
  43 u8 RSN_CIPHER_SUITE_WRAP[] = { 0x00, 0x0f, 0xac, 3 };
  44 u8 RSN_CIPHER_SUITE_CCMP[] = { 0x00, 0x0f, 0xac, 4 };
  45 u8 RSN_CIPHER_SUITE_WEP104[] = { 0x00, 0x0f, 0xac, 5 };
  46 /*  */
  47 /*  for adhoc-master to generate ie and provide supported-rate to fw */
  48 /*  */
  49
  50 static u8       WIFI_CCKRATES[] = {
  51         (IEEE80211_CCK_RATE_1MB | IEEE80211_BASIC_RATE_MASK),
  52         (IEEE80211_CCK_RATE_2MB | IEEE80211_BASIC_RATE_MASK),
  53         (IEEE80211_CCK_RATE_5MB | IEEE80211_BASIC_RATE_MASK),
  54         (IEEE80211_CCK_RATE_11MB | IEEE80211_BASIC_RATE_MASK)
  55         };
  56
  57 static u8       WIFI_OFDMRATES[] = {
  58          (IEEE80211_OFDM_RATE_6MB),
  59          (IEEE80211_OFDM_RATE_9MB),
  60          (IEEE80211_OFDM_RATE_12MB),
  61          (IEEE80211_OFDM_RATE_18MB),
  62          (IEEE80211_OFDM_RATE_24MB),
  63          IEEE80211_OFDM_RATE_36MB,
  64          IEEE80211_OFDM_RATE_48MB,
  65          IEEE80211_OFDM_RATE_54MB
  66         };
  67
  68
  69 int rtw_get_bit_value_from_ieee_value(u8 val)
  70 {
  71         unsigned char dot11_rate_table[] = {
  72                 2, 4, 11, 22, 12, 18, 24, 36, 48,
  73                 72, 96, 108, 0}; /*  last element must be zero!! */
  74         int i = 0;
  75
  76         while (dot11_rate_table[i] != 0) {
  77                 if (dot11_rate_table[i] == val)
  78                         return BIT(i);
  79                 i++;
  80         }
  81         return 0;
  82 }
  83
  84 uint    rtw_is_cckrates_included(u8 *rate)
  85 {
  86         u32     i = 0;
  87
  88         while (rate[i] != 0) {
  89                 if  ((((rate[i]) & 0x7f) == 2) || (((rate[i]) & 0x7f) == 4) ||
  90                      (((rate[i]) & 0x7f) == 11)  || (((rate[i]) & 0x7f) == 22))
  91                         return true;
  92                 i++;
  93         }
  94         return false;
  95 }
  96
  97 uint    rtw_is_cckratesonly_included(u8 *rate)
  98 {
  99         u32 i = 0;
 100
 101         while (rate[i] != 0) {
 102                 if  ((((rate[i]) & 0x7f) != 2) && (((rate[i]) & 0x7f) != 4) &&
 103                      (((rate[i]) & 0x7f) != 11)  && (((rate[i]) & 0x7f) != 22))
 104                         return false;
 105                 i++;
 106         }
 107
 108         return true;
 109 }
 110
 111 int rtw_check_network_type(unsigned char *rate, int ratelen, int channel)
 112 {
 113         if (channel > 14) {
 114                 if ((rtw_is_cckrates_included(rate)) == true)
 115                         return WIRELESS_INVALID;
 116                 else
 117                         return WIRELESS_11A;
 118         } else {  /*  could be pure B, pure G, or B/G */
 119                 if ((rtw_is_cckratesonly_included(rate)) == true)
 120                         return WIRELESS_11B;
 121                 else if ((rtw_is_cckrates_included(rate)) == true)
 122                         return  WIRELESS_11BG;
 123                 else
 124                         return WIRELESS_11G;
 125         }
 126 }
 127
 128 u8 *rtw_set_fixed_ie(void *pbuf, unsigned int len, void *source,
 129                      unsigned int *frlen)
 130 {
 131         memcpy(pbuf, source, len);
 132         *frlen = *frlen + len;
 133         return ((u8 *)pbuf) + len;
 134 }
 135
 136 /*  rtw_set_ie will update frame length */
 137 u8 *rtw_set_ie
 138 (
 139         u8 *pbuf,
 140         int index,
 141         uint len,
 142         u8 *source,
 143         uint *frlen /* frame length */
 144 )
 145 {
 146         *pbuf = (u8)index;
 147
 148         *(pbuf + 1) = (u8)len;
 149
 150         if (len > 0)
 151                 memcpy((void *)(pbuf + 2), (void *)source, len);
 152
 153         *frlen = *frlen + (len + 2);
 154
 155         return pbuf + len + 2;
 156 }
 157
 158 /*----------------------------------------------------------------------------
 159 index: the information element id index, limit is the limit for search
 160 -----------------------------------------------------------------------------*/
 161 u8 *rtw_get_ie(u8 *pbuf, int index, uint *len, int limit)
 162 {
 163         int tmp, i;
 164         u8 *p;
 165
 166         if (limit < 1)
 167                 return NULL;
 168
 169         p = pbuf;
 170         i = 0;
 171         *len = 0;
 172         while (1) {
 173                 if (*p == index) {
 174                         *len = *(p + 1);
 175                         return p;
 176                 } else {
 177                         tmp = *(p + 1);
 178                         p += (tmp + 2);
 179                         i += (tmp + 2);
 180                 }
 181                 if (i >= limit)
 182                         break;
 183         }
 184         return NULL;
 185 }
 186
 187 void rtw_set_supported_rate(u8 *SupportedRates, uint mode)
 188 {
 189
 190         memset(SupportedRates, 0, NDIS_802_11_LENGTH_RATES_EX);
 191
 192         switch (mode) {
 193         case WIRELESS_11B:
 194                 memcpy(SupportedRates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
 195                 break;
 196         case WIRELESS_11G:
 197         case WIRELESS_11A:
 198         case WIRELESS_11_5N:
 199         case WIRELESS_11A_5N:/* Todo: no basic rate for ofdm ? */
 200                 memcpy(SupportedRates, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN);
 201                 break;
 202         case WIRELESS_11BG:
 203         case WIRELESS_11G_24N:
 204         case WIRELESS_11_24N:
 205         case WIRELESS_11BG_24N:
 206                 memcpy(SupportedRates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
 207                 memcpy(SupportedRates + IEEE80211_CCK_RATE_LEN, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN);
 208                 break;
 209         }
 210 }
 211
 212 uint    rtw_get_rateset_len(u8  *rateset)
 213 {
 214         uint i = 0;
 215
 216         while (1) {
 217                 if ((rateset[i]) == 0)
 218                         break;
 219                 if (i > 12)
 220                         break;
 221                 i++;
 222         }
 223         return i;
 224 }
 225
 226 int rtw_generate_ie(struct registry_priv *pregistrypriv)
 227 {
 228         u8      wireless_mode;
 229         int     rateLen;
 230         uint    sz = 0;
 231         struct wlan_bssid_ex *pdev_network = &pregistrypriv->dev_network;
 232         u8 *ie = pdev_network->IEs;
 233
 234
 235         /* timestamp will be inserted by hardware */
 236         sz += 8;
 237         ie += sz;
 238
 239         /* beacon interval : 2bytes */
 240         *(__le16 *)ie = cpu_to_le16((u16)pdev_network->Configuration.BeaconPeriod);/* BCN_INTERVAL; */
 241         sz += 2;
 242         ie += 2;
 243
 244         /* capability info */
 245         *(u16 *)ie = 0;
 246
 247         *(__le16 *)ie |= cpu_to_le16(cap_IBSS);
 248
 249         if (pregistrypriv->preamble == PREAMBLE_SHORT)
 250                 *(__le16 *)ie |= cpu_to_le16(cap_ShortPremble);
 251
 252         if (pdev_network->Privacy)
 253                 *(__le16 *)ie |= cpu_to_le16(cap_Privacy);
 254
 255         sz += 2;
 256         ie += 2;
 257
 258         /* SSID */
 259         ie = rtw_set_ie(ie, _SSID_IE_, pdev_network->Ssid.SsidLength, pdev_network->Ssid.Ssid, &sz);
 260
 261         /* supported rates */
 262         if (pregistrypriv->wireless_mode == WIRELESS_11ABGN) {
 263                 if (pdev_network->Configuration.DSConfig > 14)
 264                         wireless_mode = WIRELESS_11A_5N;
 265                 else
 266                         wireless_mode = WIRELESS_11BG_24N;
 267         } else {
 268                 wireless_mode = pregistrypriv->wireless_mode;
 269         }
 270
 271                 rtw_set_supported_rate(pdev_network->SupportedRates, wireless_mode);
 272
 273         rateLen = rtw_get_rateset_len(pdev_network->SupportedRates);
 274
 275         if (rateLen > 8) {
 276                 ie = rtw_set_ie(ie, _SUPPORTEDRATES_IE_, 8, pdev_network->SupportedRates, &sz);
 277                 /* ie = rtw_set_ie(ie, _EXT_SUPPORTEDRATES_IE_, (rateLen - 8), (pdev_network->SupportedRates + 8), &sz); */
 278         } else {
 279                 ie = rtw_set_ie(ie, _SUPPORTEDRATES_IE_, rateLen, pdev_network->SupportedRates, &sz);
 280         }
 281
 282         /* DS parameter set */
 283         ie = rtw_set_ie(ie, _DSSET_IE_, 1, (u8 *)&(pdev_network->Configuration.DSConfig), &sz);
 284
 285         /* IBSS Parameter Set */
 286
 287         ie = rtw_set_ie(ie, _IBSS_PARA_IE_, 2, (u8 *)&(pdev_network->Configuration.ATIMWindow), &sz);
 288
 289         if (rateLen > 8)
 290                 ie = rtw_set_ie(ie, _EXT_SUPPORTEDRATES_IE_, (rateLen - 8), (pdev_network->SupportedRates + 8), &sz);
 291
 292         return sz;
 293 }
 294
 295 unsigned char *rtw_get_wpa_ie(unsigned char *pie, uint *wpa_ie_len, int limit)
 296 {
 297         uint len;
 298         u16 val16;
 299         __le16 le_tmp;
 300         unsigned char wpa_oui_type[] = {0x00, 0x50, 0xf2, 0x01};
 301         u8 *pbuf = pie;
 302         int limit_new = limit;
 303
 304         while (1) {
 305                 pbuf = rtw_get_ie(pbuf, _WPA_IE_ID_, &len, limit_new);
 306
 307                 if (pbuf) {
 308                         /* check if oui matches... */
 309                         if (!memcmp((pbuf + 2), wpa_oui_type, sizeof(wpa_oui_type)) == false)
 310                                 goto check_next_ie;
 311
 312                         /* check version... */
 313                         memcpy((u8 *)&le_tmp, (pbuf + 6), sizeof(val16));
 314
 315                         val16 = le16_to_cpu(le_tmp);
 316                         if (val16 != 0x0001)
 317                                 goto check_next_ie;
 318                         *wpa_ie_len = *(pbuf + 1);
 319                         return pbuf;
 320                 } else {
 321                         *wpa_ie_len = 0;
 322                         return NULL;
 323                 }
 324
 325 check_next_ie:
 326                 limit_new = limit - (pbuf - pie) - 2 - len;
 327                 if (limit_new <= 0)
 328                         break;
 329                 pbuf += (2 + len);
 330         }
 331         *wpa_ie_len = 0;
 332         return NULL;
 333 }
 334
 335 unsigned char *rtw_get_wpa2_ie(unsigned char *pie, uint *rsn_ie_len, int limit)
 336 {
 337
 338         return rtw_get_ie(pie, _WPA2_IE_ID_, rsn_ie_len, limit);
 339 }
 340
 341 int rtw_get_wpa_cipher_suite(u8 *s)
 342 {
 343         if (!memcmp(s, WPA_CIPHER_SUITE_NONE, WPA_SELECTOR_LEN))
 344                 return WPA_CIPHER_NONE;
 345         if (!memcmp(s, WPA_CIPHER_SUITE_WEP40, WPA_SELECTOR_LEN))
 346                 return WPA_CIPHER_WEP40;
 347         if (!memcmp(s, WPA_CIPHER_SUITE_TKIP, WPA_SELECTOR_LEN))
 348                 return WPA_CIPHER_TKIP;
 349         if (!memcmp(s, WPA_CIPHER_SUITE_CCMP, WPA_SELECTOR_LEN))
 350                 return WPA_CIPHER_CCMP;
 351         if (!memcmp(s, WPA_CIPHER_SUITE_WEP104, WPA_SELECTOR_LEN))
 352                 return WPA_CIPHER_WEP104;
 353
 354         return 0;
 355 }
 356
 357 int rtw_get_wpa2_cipher_suite(u8 *s)
 358 {
 359         if (!memcmp(s, RSN_CIPHER_SUITE_NONE, RSN_SELECTOR_LEN))
 360                 return WPA_CIPHER_NONE;
 361         if (!memcmp(s, RSN_CIPHER_SUITE_WEP40, RSN_SELECTOR_LEN))
 362                 return WPA_CIPHER_WEP40;
 363         if (!memcmp(s, RSN_CIPHER_SUITE_TKIP, RSN_SELECTOR_LEN))
 364                 return WPA_CIPHER_TKIP;
 365         if (!memcmp(s, RSN_CIPHER_SUITE_CCMP, RSN_SELECTOR_LEN))
 366                 return WPA_CIPHER_CCMP;
 367         if (!memcmp(s, RSN_CIPHER_SUITE_WEP104, RSN_SELECTOR_LEN))
 368                 return WPA_CIPHER_WEP104;
 369
 370         return 0;
 371 }
 372
 373
 374 int rtw_parse_wpa_ie(u8 *wpa_ie, int wpa_ie_len, int *group_cipher, int *pairwise_cipher, int *is_8021x)
 375 {
 376         int i, ret = _SUCCESS;
 377         int left, count;
 378         u8 *pos;
 379         u8 SUITE_1X[4] = {0x00, 0x50, 0xf2, 1};
 380
 381         if (wpa_ie_len <= 0) {
 382                 /* No WPA IE - fail silently */
 383                 return _FAIL;
 384         }
 385
 386
 387         if ((*wpa_ie != _WPA_IE_ID_) || (*(wpa_ie + 1) != (u8)(wpa_ie_len - 2)) ||
 388             (memcmp(wpa_ie + 2, RTW_WPA_OUI_TYPE, WPA_SELECTOR_LEN)))
 389                 return _FAIL;
 390
 391         pos = wpa_ie;
 392
 393         pos += 8;
 394         left = wpa_ie_len - 8;
 395
 396
 397         /* group_cipher */
 398         if (left >= WPA_SELECTOR_LEN) {
 399                 *group_cipher = rtw_get_wpa_cipher_suite(pos);
 400                 pos += WPA_SELECTOR_LEN;
 401                 left -= WPA_SELECTOR_LEN;
 402         } else if (left > 0) {
 403                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie length mismatch, %u too much", __func__, left));
 404                 return _FAIL;
 405         }
 406
 407         /* pairwise_cipher */
 408         if (left >= 2) {
 409                 count = get_unaligned_le16(pos);
 410                 pos += 2;
 411                 left -= 2;
 412
 413                 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
 414                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie count botch (pairwise), "
 415                                                 "count %u left %u", __func__, count, left));
 416                         return _FAIL;
 417                 }
 418
 419                 for (i = 0; i < count; i++) {
 420                         *pairwise_cipher |= rtw_get_wpa_cipher_suite(pos);
 421
 422                         pos += WPA_SELECTOR_LEN;
 423                         left -= WPA_SELECTOR_LEN;
 424                 }
 425         } else if (left == 1) {
 426                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie too short (for key mgmt)",   __func__));
 427                 return _FAIL;
 428         }
 429
 430         if (is_8021x) {
 431                 if (left >= 6) {
 432                         pos += 2;
 433                         if (!memcmp(pos, SUITE_1X, 4)) {
 434                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s : there has 802.1x auth\n", __func__));
 435                                 *is_8021x = 1;
 436                         }
 437                 }
 438         }
 439
 440         return ret;
 441 }
 442
 443 int rtw_parse_wpa2_ie(u8 *rsn_ie, int rsn_ie_len, int *group_cipher, int *pairwise_cipher, int *is_8021x)
 444 {
 445         int i, ret = _SUCCESS;
 446         int left, count;
 447         u8 *pos;
 448         u8 SUITE_1X[4] = {0x00, 0x0f, 0xac, 0x01};
 449
 450         if (rsn_ie_len <= 0) {
 451                 /* No RSN IE - fail silently */
 452                 return _FAIL;
 453         }
 454
 455
 456         if ((*rsn_ie != _WPA2_IE_ID_) || (*(rsn_ie + 1) != (u8)(rsn_ie_len - 2)))
 457                 return _FAIL;
 458
 459         pos = rsn_ie;
 460         pos += 4;
 461         left = rsn_ie_len - 4;
 462
 463         /* group_cipher */
 464         if (left >= RSN_SELECTOR_LEN) {
 465                 *group_cipher = rtw_get_wpa2_cipher_suite(pos);
 466
 467                 pos += RSN_SELECTOR_LEN;
 468                 left -= RSN_SELECTOR_LEN;
 469
 470         } else if (left > 0) {
 471                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie length mismatch, %u too much", __func__, left));
 472                 return _FAIL;
 473         }
 474
 475         /* pairwise_cipher */
 476         if (left >= 2) {
 477                 count = get_unaligned_le16(pos);
 478                 pos += 2;
 479                 left -= 2;
 480
 481                 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
 482                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie count botch (pairwise), "
 483                                                  "count %u left %u", __func__, count, left));
 484                         return _FAIL;
 485                 }
 486
 487                 for (i = 0; i < count; i++) {
 488                         *pairwise_cipher |= rtw_get_wpa2_cipher_suite(pos);
 489
 490                         pos += RSN_SELECTOR_LEN;
 491                         left -= RSN_SELECTOR_LEN;
 492                 }
 493
 494         } else if (left == 1) {
 495                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie too short (for key mgmt)",  __func__));
 496
 497                 return _FAIL;
 498         }
 499
 500         if (is_8021x) {
 501                 if (left >= 6) {
 502                         pos += 2;
 503                         if (!memcmp(pos, SUITE_1X, 4)) {
 504                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s (): there has 802.1x auth\n", __func__));
 505                                 *is_8021x = 1;
 506                         }
 507                 }
 508         }
 509         return ret;
 510 }
 511
 512 int rtw_get_sec_ie(u8 *in_ie, uint in_len, u8 *rsn_ie, u16 *rsn_len, u8 *wpa_ie, u16 *wpa_len)
 513 {
 514         u8 authmode, sec_idx, i;
 515         u8 wpa_oui[4] = {0x0, 0x50, 0xf2, 0x01};
 516         uint    cnt;
 517
 518
 519         /* Search required WPA or WPA2 IE and copy to sec_ie[] */
 520
 521         cnt = _TIMESTAMP_ + _BEACON_ITERVAL_ + _CAPABILITY_;
 522
 523         sec_idx = 0;
 524
 525         while (cnt < in_len) {
 526                 authmode = in_ie[cnt];
 527
 528                 if ((authmode == _WPA_IE_ID_) && (!memcmp(&in_ie[cnt + 2], &wpa_oui[0], 4))) {
 529                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 530                                          ("\n rtw_get_wpa_ie: sec_idx =%d in_ie[cnt+1]+2 =%d\n",
 531                                          sec_idx, in_ie[cnt + 1] + 2));
 532
 533                                 if (wpa_ie) {
 534                                         memcpy(wpa_ie, &in_ie[cnt], in_ie[cnt + 1] + 2);
 535
 536                                         for (i = 0; i < (in_ie[cnt + 1] + 2); i += 8) {
 537                                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 538                                                          ("\n %2x,%2x,%2x,%2x,%2x,%2x,%2x,%2x\n",
 539                                                          wpa_ie[i], wpa_ie[i + 1], wpa_ie[i + 2], wpa_ie[i + 3], wpa_ie[i + 4],
 540                                                          wpa_ie[i + 5], wpa_ie[i + 6], wpa_ie[i + 7]));
 541                                         }
 542                                 }
 543
 544                                 *wpa_len = in_ie[cnt + 1] + 2;
 545                                 cnt += in_ie[cnt + 1] + 2;  /* get next */
 546                 } else {
 547                         if (authmode == _WPA2_IE_ID_) {
 548                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 549                                          ("\n get_rsn_ie: sec_idx =%d in_ie[cnt+1]+2 =%d\n",
 550                                          sec_idx, in_ie[cnt + 1] + 2));
 551
 552                                 if (rsn_ie) {
 553                                         memcpy(rsn_ie, &in_ie[cnt], in_ie[cnt + 1] + 2);
 554
 555                                         for (i = 0; i < (in_ie[cnt + 1] + 2); i += 8) {
 556                                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 557                                                          ("\n %2x,%2x,%2x,%2x,%2x,%2x,%2x,%2x\n",
 558                                                          rsn_ie[i], rsn_ie[i + 1], rsn_ie[i + 2], rsn_ie[i + 3], rsn_ie[i + 4],
 559                                                          rsn_ie[i + 5], rsn_ie[i + 6], rsn_ie[i + 7]));
 560                                                 }
 561                                 }
 562
 563                                 *rsn_len = in_ie[cnt + 1] + 2;
 564                                 cnt += in_ie[cnt + 1] + 2;  /* get next */
 565                         } else {
 566                                 cnt += in_ie[cnt + 1] + 2;   /* get next */
 567                         }
 568                 }
 569         }
 570
 571
 572         return *rsn_len + *wpa_len;
 573 }
 574
 575 u8 rtw_is_wps_ie(u8 *ie_ptr, uint *wps_ielen)
 576 {
 577         u8 match = false;
 578         u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04};
 579
 580         if (ie_ptr == NULL)
 581                 return match;
 582
 583         eid = ie_ptr[0];
 584
 585         if ((eid == _WPA_IE_ID_) && (!memcmp(&ie_ptr[2], wps_oui, 4))) {
 586                 *wps_ielen = ie_ptr[1] + 2;
 587                 match = true;
 588         }
 589         return match;
 590 }
 591
 592 /**
 593  * rtw_get_wps_ie - Search WPS IE from a series of IEs
 594  * @in_ie: Address of IEs to search
 595  * @in_len: Length limit from in_ie
 596  * @wps_ie: If not NULL and WPS IE is found, WPS IE will be copied to the buf starting from wps_ie
 597  * @wps_ielen: If not NULL and WPS IE is found, will set to the length of the entire WPS IE
 598  *
 599  * Returns: The address of the WPS IE found, or NULL
 600  */
 601 u8 *rtw_get_wps_ie(u8 *in_ie, uint in_len, u8 *wps_ie, uint *wps_ielen)
 602 {
 603         uint cnt;
 604         u8 *wpsie_ptr = NULL;
 605         u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04};
 606
 607         if (wps_ielen)
 608                 *wps_ielen = 0;
 609
 610         if (!in_ie || in_len <= 0)
 611                 return wpsie_ptr;
 612
 613         cnt = 0;
 614
 615         while (cnt < in_len) {
 616                 eid = in_ie[cnt];
 617
 618                 if ((eid == _WPA_IE_ID_) && (!memcmp(&in_ie[cnt + 2], wps_oui, 4))) {
 619                         wpsie_ptr = &in_ie[cnt];
 620
 621                         if (wps_ie)
 622                                 memcpy(wps_ie, &in_ie[cnt], in_ie[cnt + 1] + 2);
 623
 624                         if (wps_ielen)
 625                                 *wps_ielen = in_ie[cnt + 1] + 2;
 626
 627                         cnt += in_ie[cnt + 1] + 2;
 628
 629                         break;
 630                 } else {
 631                         cnt += in_ie[cnt + 1] + 2; /* goto next */
 632                 }
 633         }
 634         return wpsie_ptr;
 635 }
 636
 637 /**
 638  * rtw_get_wps_attr - Search a specific WPS attribute from a given WPS IE
 639  * @wps_ie: Address of WPS IE to search
 640  * @wps_ielen: Length limit from wps_ie
 641  * @target_attr_id: The attribute ID of WPS attribute to search
 642  * @buf_attr: If not NULL and the WPS attribute is found, WPS attribute will be copied to the buf starting from buf_attr
 643  * @len_attr: If not NULL and the WPS attribute is found, will set to the length of the entire WPS attribute
 644  *
 645  * Returns: the address of the specific WPS attribute found, or NULL
 646  */
 647 u8 *rtw_get_wps_attr(u8 *wps_ie, uint wps_ielen, u16 target_attr_id, u8 *buf_attr, u32 *len_attr)
 648 {
 649         u8 *attr_ptr = NULL;
 650         u8 *target_attr_ptr = NULL;
 651         u8 wps_oui[4] = {0x00, 0x50, 0xF2, 0x04};
 652
 653         if (len_attr)
 654                 *len_attr = 0;
 655
 656         if ((wps_ie[0] != _VENDOR_SPECIFIC_IE_) ||
 657             (memcmp(wps_ie + 2, wps_oui, 4)))
 658                 return attr_ptr;
 659
 660         /*  6 = 1(Element ID) + 1(Length) + 4(WPS OUI) */
 661         attr_ptr = wps_ie + 6; /* goto first attr */
 662
 663         while (attr_ptr - wps_ie < wps_ielen) {
 664                 /*  4 = 2(Attribute ID) + 2(Length) */
 665                 u16 attr_id = get_unaligned_be16(attr_ptr);
 666                 u16 attr_data_len = get_unaligned_be16(attr_ptr + 2);
 667                 u16 attr_len = attr_data_len + 4;
 668
 669                 if (attr_id == target_attr_id) {
 670                         target_attr_ptr = attr_ptr;
 671                         if (buf_attr)
 672                                 memcpy(buf_attr, attr_ptr, attr_len);
 673                         if (len_attr)
 674                                 *len_attr = attr_len;
 675                         break;
 676                 } else {
 677                         attr_ptr += attr_len; /* goto next */
 678                 }
 679         }
 680         return target_attr_ptr;
 681 }
 682
 683 /**
 684  * rtw_get_wps_attr_content - Search a specific WPS attribute content from a given WPS IE
 685  * @wps_ie: Address of WPS IE to search
 686  * @wps_ielen: Length limit from wps_ie
 687  * @target_attr_id: The attribute ID of WPS attribute to search
 688  * @buf_content: If not NULL and the WPS attribute is found, WPS attribute content will be copied to the buf starting from buf_content
 689  * @len_content: If not NULL and the WPS attribute is found, will set to the length of the WPS attribute content
 690  *
 691  * Returns: the address of the specific WPS attribute content found, or NULL
 692  */
 693 u8 *rtw_get_wps_attr_content(u8 *wps_ie, uint wps_ielen, u16 target_attr_id, u8 *buf_content, uint *len_content)
 694 {
 695         u8 *attr_ptr;
 696         u32 attr_len;
 697
 698         if (len_content)
 699                 *len_content = 0;
 700
 701         attr_ptr = rtw_get_wps_attr(wps_ie, wps_ielen, target_attr_id, NULL, &attr_len);
 702
 703         if (attr_ptr && attr_len) {
 704                 if (buf_content)
 705                         memcpy(buf_content, attr_ptr + 4, attr_len - 4);
 706
 707                 if (len_content)
 708                         *len_content = attr_len - 4;
 709
 710                 return attr_ptr + 4;
 711         }
 712
 713         return NULL;
 714 }
 715
 716 static int rtw_ieee802_11_parse_vendor_specific(u8 *pos, uint elen,
 717                                             struct rtw_ieee802_11_elems *elems,
 718                                             int show_errors)
 719 {
 720         unsigned int oui;
 721
 722         /* first 3 bytes in vendor specific information element are the IEEE
 723          * OUI of the vendor. The following byte is used a vendor specific
 724          * sub-type. */
 725         if (elen < 4) {
 726                 if (show_errors) {
 727                         DBG_88E("short vendor specific information element ignored (len=%lu)\n",
 728                                 (unsigned long)elen);
 729                 }
 730                 return -1;
 731         }
 732
 733         oui = RTW_GET_BE24(pos);
 734         switch (oui) {
 735         case OUI_MICROSOFT:
 736                 /* Microsoft/Wi-Fi information elements are further typed and
 737                  * subtyped */
 738                 switch (pos[3]) {
 739                 case 1:
 740                         /* Microsoft OUI (00:50:F2) with OUI Type 1:
 741                          * real WPA information element */
 742                         elems->wpa_ie = pos;
 743                         elems->wpa_ie_len = elen;
 744                         break;
 745                 case WME_OUI_TYPE: /* this is a Wi-Fi WME info. element */
 746                         if (elen < 5) {
 747                                 DBG_88E("short WME information element ignored (len=%lu)\n",
 748                                         (unsigned long)elen);
 749                                 return -1;
 750                         }
 751                         switch (pos[4]) {
 752                         case WME_OUI_SUBTYPE_INFORMATION_ELEMENT:
 753                         case WME_OUI_SUBTYPE_PARAMETER_ELEMENT:
 754                                 elems->wme = pos;
 755                                 elems->wme_len = elen;
 756                                 break;
 757                         case WME_OUI_SUBTYPE_TSPEC_ELEMENT:
 758                                 elems->wme_tspec = pos;
 759                                 elems->wme_tspec_len = elen;
 760                                 break;
 761                         default:
 762                                 DBG_88E("unknown WME information element ignored (subtype=%d len=%lu)\n",
 763                                         pos[4], (unsigned long)elen);
 764                                 return -1;
 765                         }
 766                         break;
 767                 case 4:
 768                         /* Wi-Fi Protected Setup (WPS) IE */
 769                         elems->wps_ie = pos;
 770                         elems->wps_ie_len = elen;
 771                         break;
 772                 default:
 773                         DBG_88E("Unknown Microsoft information element ignored (type=%d len=%lu)\n",
 774                                 pos[3], (unsigned long)elen);
 775                         return -1;
 776                 }
 777                 break;
 778
 779         case OUI_BROADCOM:
 780                 switch (pos[3]) {
 781                 case VENDOR_HT_CAPAB_OUI_TYPE:
 782                         elems->vendor_ht_cap = pos;
 783                         elems->vendor_ht_cap_len = elen;
 784                         break;
 785                 default:
 786                         DBG_88E("Unknown Broadcom information element ignored (type=%d len=%lu)\n",
 787                                 pos[3], (unsigned long)elen);
 788                         return -1;
 789                 }
 790                 break;
 791         default:
 792                 DBG_88E("unknown vendor specific information element ignored (vendor OUI %3phC len=%lu)\n",
 793                         pos, (unsigned long)elen);
 794                 return -1;
 795         }
 796         return 0;
 797 }
 798
 799 /**
 800  * ieee802_11_parse_elems - Parse information elements in management frames
 801  * @start: Pointer to the start of IEs
 802  * @len: Length of IE buffer in octets
 803  * @elems: Data structure for parsed elements
 804  * @show_errors: Whether to show parsing errors in debug log
 805  * Returns: Parsing result
 806  */
 807 enum parse_res rtw_ieee802_11_parse_elems(u8 *start, uint len,
 808                                 struct rtw_ieee802_11_elems *elems,
 809                                 int show_errors)
 810 {
 811         uint left = len;
 812         u8 *pos = start;
 813         int unknown = 0;
 814
 815         memset(elems, 0, sizeof(*elems));
 816
 817         while (left >= 2) {
 818                 u8 id, elen;
 819
 820                 id = *pos++;
 821                 elen = *pos++;
 822                 left -= 2;
 823
 824                 if (elen > left) {
 825                         if (show_errors) {
 826                                 DBG_88E("IEEE 802.11 element parse failed (id=%d elen=%d left=%lu)\n",
 827                                         id, elen, (unsigned long)left);
 828                         }
 829                         return ParseFailed;
 830                 }
 831
 832                 switch (id) {
 833                 case WLAN_EID_SSID:
 834                         elems->ssid = pos;
 835                         elems->ssid_len = elen;
 836                         break;
 837                 case WLAN_EID_SUPP_RATES:
 838                         elems->supp_rates = pos;
 839                         elems->supp_rates_len = elen;
 840                         break;
 841                 case WLAN_EID_FH_PARAMS:
 842                         elems->fh_params = pos;
 843                         elems->fh_params_len = elen;
 844                         break;
 845                 case WLAN_EID_DS_PARAMS:
 846                         elems->ds_params = pos;
 847                         elems->ds_params_len = elen;
 848                         break;
 849                 case WLAN_EID_CF_PARAMS:
 850                         elems->cf_params = pos;
 851                         elems->cf_params_len = elen;
 852                         break;
 853                 case WLAN_EID_TIM:
 854                         elems->tim = pos;
 855                         elems->tim_len = elen;
 856                         break;
 857                 case WLAN_EID_IBSS_PARAMS:
 858                         elems->ibss_params = pos;
 859                         elems->ibss_params_len = elen;
 860                         break;
 861                 case WLAN_EID_CHALLENGE:
 862                         elems->challenge = pos;
 863                         elems->challenge_len = elen;
 864                         break;
 865                 case WLAN_EID_ERP_INFO:
 866                         elems->erp_info = pos;
 867                         elems->erp_info_len = elen;
 868                         break;
 869                 case WLAN_EID_EXT_SUPP_RATES:
 870                         elems->ext_supp_rates = pos;
 871                         elems->ext_supp_rates_len = elen;
 872                         break;
 873                 case WLAN_EID_VENDOR_SPECIFIC:
 874                         if (rtw_ieee802_11_parse_vendor_specific(pos, elen, elems, show_errors))
 875                                 unknown++;
 876                         break;
 877                 case WLAN_EID_RSN:
 878                         elems->rsn_ie = pos;
 879                         elems->rsn_ie_len = elen;
 880                         break;
 881                 case WLAN_EID_PWR_CAPABILITY:
 882                         elems->power_cap = pos;
 883                         elems->power_cap_len = elen;
 884                         break;
 885                 case WLAN_EID_SUPPORTED_CHANNELS:
 886                         elems->supp_channels = pos;
 887                         elems->supp_channels_len = elen;
 888                         break;
 889                 case WLAN_EID_MOBILITY_DOMAIN:
 890                         elems->mdie = pos;
 891                         elems->mdie_len = elen;
 892                         break;
 893                 case WLAN_EID_FAST_BSS_TRANSITION:
 894                         elems->ftie = pos;
 895                         elems->ftie_len = elen;
 896                         break;
 897                 case WLAN_EID_TIMEOUT_INTERVAL:
 898                         elems->timeout_int = pos;
 899                         elems->timeout_int_len = elen;
 900                         break;
 901                 case WLAN_EID_HT_CAPABILITY:
 902                         elems->ht_capabilities = pos;
 903                         elems->ht_capabilities_len = elen;
 904                         break;
 905                 case WLAN_EID_HT_OPERATION:
 906                         elems->ht_operation = pos;
 907                         elems->ht_operation_len = elen;
 908                         break;
 909                 default:
 910                         unknown++;
 911                         if (!show_errors)
 912                                 break;
 913                         DBG_88E("IEEE 802.11 element parse ignored unknown element (id=%d elen=%d)\n",
 914                                 id, elen);
 915                         break;
 916                 }
 917                 left -= elen;
 918                 pos += elen;
 919         }
 920         if (left)
 921                 return ParseFailed;
 922         return unknown ? ParseUnknown : ParseOK;
 923 }
 924
 925 void rtw_macaddr_cfg(u8 *mac_addr)
 926 {
 927         u8 mac[ETH_ALEN];
 928
 929         if (mac_addr == NULL)
 930                 return;
 931
 932         if (rtw_initmac && mac_pton(rtw_initmac, mac)) {
 933                 /* Users specify the mac address */
 934                 memcpy(mac_addr, mac, ETH_ALEN);
 935         } else {
 936                 /* Use the mac address stored in the Efuse */
 937                 memcpy(mac, mac_addr, ETH_ALEN);
 938         }
 939
 940         if (((mac[0] == 0xff) && (mac[1] == 0xff) && (mac[2] == 0xff) &&
 941              (mac[3] == 0xff) && (mac[4] == 0xff) && (mac[5] == 0xff)) ||
 942             ((mac[0] == 0x0) && (mac[1] == 0x0) && (mac[2] == 0x0) &&
 943              (mac[3] == 0x0) && (mac[4] == 0x0) && (mac[5] == 0x0))) {
 944                 mac[0] = 0x00;
 945                 mac[1] = 0xe0;
 946                 mac[2] = 0x4c;
 947                 mac[3] = 0x87;
 948                 mac[4] = 0x00;
 949                 mac[5] = 0x00;
 950                 /*  use default mac address */
 951                 memcpy(mac_addr, mac, ETH_ALEN);
 952                 DBG_88E("MAC Address from efuse error, assign default one !!!\n");
 953         }
 954
 955         DBG_88E("rtw_macaddr_cfg MAC Address  = %pM\n", (mac_addr));
 956 }
 957
 958 static int rtw_get_cipher_info(struct wlan_network *pnetwork)
 959 {
 960         uint wpa_ielen;
 961         unsigned char *pbuf;
 962         int group_cipher = 0, pairwise_cipher = 0, is8021x = 0;
 963         int ret = _FAIL;
 964
 965         pbuf = rtw_get_wpa_ie(&pnetwork->network.IEs[12], &wpa_ielen, pnetwork->network.IELength - 12);
 966
 967         if (pbuf && (wpa_ielen > 0)) {
 968                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("rtw_get_cipher_info: wpa_ielen: %d", wpa_ielen));
 969                 if (_SUCCESS == rtw_parse_wpa_ie(pbuf, wpa_ielen + 2, &group_cipher, &pairwise_cipher, &is8021x)) {
 970                         pnetwork->BcnInfo.pairwise_cipher = pairwise_cipher;
 971                         pnetwork->BcnInfo.group_cipher = group_cipher;
 972                         pnetwork->BcnInfo.is_8021x = is8021x;
 973                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: pnetwork->pairwise_cipher: %d, is_8021x is %d",
 974                                  __func__, pnetwork->BcnInfo.pairwise_cipher, pnetwork->BcnInfo.is_8021x));
 975                         ret = _SUCCESS;
 976                 }
 977         } else {
 978                 pbuf = rtw_get_wpa2_ie(&pnetwork->network.IEs[12], &wpa_ielen, pnetwork->network.IELength - 12);
 979
 980                 if (pbuf && (wpa_ielen > 0)) {
 981                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("get RSN IE\n"));
 982                         if (_SUCCESS == rtw_parse_wpa2_ie(pbuf, wpa_ielen + 2, &group_cipher, &pairwise_cipher, &is8021x)) {
 983                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("get RSN IE  OK!!!\n"));
 984                                 pnetwork->BcnInfo.pairwise_cipher = pairwise_cipher;
 985                                 pnetwork->BcnInfo.group_cipher = group_cipher;
 986                                 pnetwork->BcnInfo.is_8021x = is8021x;
 987                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: pnetwork->pairwise_cipher: %d,"
 988                                                         "pnetwork->group_cipher is %d, is_8021x is %d", __func__, pnetwork->BcnInfo.pairwise_cipher,
 989                                                         pnetwork->BcnInfo.group_cipher, pnetwork->BcnInfo.is_8021x));
 990                                 ret = _SUCCESS;
 991                         }
 992                 }
 993         }
 994
 995         return ret;
 996 }
 997
 998 void rtw_get_bcn_info(struct wlan_network *pnetwork)
 999 {
1000         unsigned short cap = 0;
1001         u8 bencrypt = 0;
1002         __le16 le_tmp;
1003         u16 wpa_len = 0, rsn_len = 0;
1004         struct HT_info_element *pht_info = NULL;
1005         uint len;
1006         unsigned char           *p;
1007
1008         memcpy(&le_tmp, rtw_get_capability_from_ie(pnetwork->network.IEs), 2);
1009         cap = le16_to_cpu(le_tmp);
1010         if (cap & WLAN_CAPABILITY_PRIVACY) {
1011                 bencrypt = 1;
1012                 pnetwork->network.Privacy = 1;
1013         } else {
1014                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_OPENSYS;
1015         }
1016         rtw_get_sec_ie(pnetwork->network.IEs, pnetwork->network.IELength, NULL, &rsn_len, NULL, &wpa_len);
1017         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("rtw_get_bcn_info: ssid =%s\n", pnetwork->network.Ssid.Ssid));
1018         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("rtw_get_bcn_info: wpa_len =%d rsn_len =%d\n", wpa_len, rsn_len));
1019         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("rtw_get_bcn_info: ssid =%s\n", pnetwork->network.Ssid.Ssid));
1020         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("rtw_get_bcn_info: wpa_len =%d rsn_len =%d\n", wpa_len, rsn_len));
1021
1022         if (rsn_len > 0) {
1023                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA2;
1024         } else if (wpa_len > 0) {
1025                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA;
1026         } else {
1027                 if (bencrypt)
1028                         pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WEP;
1029         }
1030         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("rtw_get_bcn_info: pnetwork->encryp_protocol is %x\n",
1031                  pnetwork->BcnInfo.encryp_protocol));
1032         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("rtw_get_bcn_info: pnetwork->encryp_protocol is %x\n",
1033                  pnetwork->BcnInfo.encryp_protocol));
1034         rtw_get_cipher_info(pnetwork);
1035
1036         /* get bwmode and ch_offset */
1037         /* parsing HT_CAP_IE */
1038         p = rtw_get_ie(pnetwork->network.IEs + _FIXED_IE_LENGTH_, _HT_CAPABILITY_IE_, &len, pnetwork->network.IELength - _FIXED_IE_LENGTH_);
1039         if (p && len > 0) {
1040                 struct ieee80211_ht_cap *ht_cap =
1041                         (struct ieee80211_ht_cap *)(p + 2);
1042
1043                 pnetwork->BcnInfo.ht_cap_info = le16_to_cpu(ht_cap->cap_info);
1044         } else {
1045                 pnetwork->BcnInfo.ht_cap_info = 0;
1046         }
1047         /* parsing HT_INFO_IE */
1048         p = rtw_get_ie(pnetwork->network.IEs + _FIXED_IE_LENGTH_, _HT_ADD_INFO_IE_, &len, pnetwork->network.IELength - _FIXED_IE_LENGTH_);
1049         if (p && len > 0) {
1050                         pht_info = (struct HT_info_element *)(p + 2);
1051                         pnetwork->BcnInfo.ht_info_infos_0 = pht_info->infos[0];
1052         } else {
1053                         pnetwork->BcnInfo.ht_info_infos_0 = 0;
1054         }
1055 }
1056
1057 /* show MCS rate, unit: 100Kbps */
1058 u16 rtw_mcs_rate(u8 rf_type, u8 bw_40MHz, u8 short_GI_20, u8 short_GI_40, unsigned char *MCS_rate)
1059 {
1060         u16 max_rate = 0;
1061
1062         if (rf_type == RF_1T1R) {
1063                 if (MCS_rate[0] & BIT(7))
1064                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 1500 : 1350) : ((short_GI_20) ? 722 : 650);
1065                 else if (MCS_rate[0] & BIT(6))
1066                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 1350 : 1215) : ((short_GI_20) ? 650 : 585);
1067                 else if (MCS_rate[0] & BIT(5))
1068                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 1200 : 1080) : ((short_GI_20) ? 578 : 520);
1069                 else if (MCS_rate[0] & BIT(4))
1070                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 900 : 810) : ((short_GI_20) ? 433 : 390);
1071                 else if (MCS_rate[0] & BIT(3))
1072                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 600 : 540) : ((short_GI_20) ? 289 : 260);
1073                 else if (MCS_rate[0] & BIT(2))
1074                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 450 : 405) : ((short_GI_20) ? 217 : 195);
1075                 else if (MCS_rate[0] & BIT(1))
1076                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 300 : 270) : ((short_GI_20) ? 144 : 130);
1077                 else if (MCS_rate[0] & BIT(0))
1078                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 150 : 135) : ((short_GI_20) ? 72 : 65);
1079         } else {
1080                 if (MCS_rate[1]) {
1081                         if (MCS_rate[1] & BIT(7))
1082                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 3000 : 2700) : ((short_GI_20) ? 1444 : 1300);
1083                         else if (MCS_rate[1] & BIT(6))
1084                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 2700 : 2430) : ((short_GI_20) ? 1300 : 1170);
1085                         else if (MCS_rate[1] & BIT(5))
1086                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 2400 : 2160) : ((short_GI_20) ? 1156 : 1040);
1087                         else if (MCS_rate[1] & BIT(4))
1088                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 1800 : 1620) : ((short_GI_20) ? 867 : 780);
1089                         else if (MCS_rate[1] & BIT(3))
1090                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 1200 : 1080) : ((short_GI_20) ? 578 : 520);
1091                         else if (MCS_rate[1] & BIT(2))
1092                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 900 : 810) : ((short_GI_20) ? 433 : 390);
1093                         else if (MCS_rate[1] & BIT(1))
1094                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 600 : 540) : ((short_GI_20) ? 289 : 260);
1095                         else if (MCS_rate[1] & BIT(0))
1096                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 300 : 270) : ((short_GI_20) ? 144 : 130);
1097                 } else {
1098                         if (MCS_rate[0] & BIT(7))
1099                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 1500 : 1350) : ((short_GI_20) ? 722 : 650);
1100                         else if (MCS_rate[0] & BIT(6))
1101                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 1350 : 1215) : ((short_GI_20) ? 650 : 585);
1102                         else if (MCS_rate[0] & BIT(5))
1103                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 1200 : 1080) : ((short_GI_20) ? 578 : 520);
1104                         else if (MCS_rate[0] & BIT(4))
1105                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 900 : 810) : ((short_GI_20) ? 433 : 390);
1106                         else if (MCS_rate[0] & BIT(3))
1107                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 600 : 540) : ((short_GI_20) ? 289 : 260);
1108                         else if (MCS_rate[0] & BIT(2))
1109                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 450 : 405) : ((short_GI_20) ? 217 : 195);
1110                         else if (MCS_rate[0] & BIT(1))
1111                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 300 : 270) : ((short_GI_20) ? 144 : 130);
1112                         else if (MCS_rate[0] & BIT(0))
1113                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 150 : 135) : ((short_GI_20) ? 72 : 65);
1114                 }
1115         }
1116         return max_rate;
1117 }