drivers/staging/rtl8188eu/core/rtw_ieee80211.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
   5  *
   6  ******************************************************************************/
   7 #define _IEEE80211_C
   8
   9 #include <linux/ieee80211.h>
  10
  11 #include <drv_types.h>
  12 #include <osdep_intf.h>
  13 #include <ieee80211.h>
  14 #include <wifi.h>
  15 #include <osdep_service.h>
  16 #include <wlan_bssdef.h>
  17
  18 u8 RTW_WPA_OUI_TYPE[] = { 0x00, 0x50, 0xf2, 1 };
  19 u8 WPA_AUTH_KEY_MGMT_NONE[] = { 0x00, 0x50, 0xf2, 0 };
  20 u8 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x50, 0xf2, 1 };
  21 u8 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x50, 0xf2, 2 };
  22 u8 WPA_CIPHER_SUITE_NONE[] = { 0x00, 0x50, 0xf2, 0 };
  23 u8 WPA_CIPHER_SUITE_WEP40[] = { 0x00, 0x50, 0xf2, 1 };
  24 u8 WPA_CIPHER_SUITE_TKIP[] = { 0x00, 0x50, 0xf2, 2 };
  25 u8 WPA_CIPHER_SUITE_WRAP[] = { 0x00, 0x50, 0xf2, 3 };
  26 u8 WPA_CIPHER_SUITE_CCMP[] = { 0x00, 0x50, 0xf2, 4 };
  27 u8 WPA_CIPHER_SUITE_WEP104[] = { 0x00, 0x50, 0xf2, 5 };
  28
  29 u16 RSN_VERSION_BSD = 1;
  30 u8 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x0f, 0xac, 1 };
  31 u8 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x0f, 0xac, 2 };
  32 u8 RSN_CIPHER_SUITE_NONE[] = { 0x00, 0x0f, 0xac, 0 };
  33 u8 RSN_CIPHER_SUITE_WEP40[] = { 0x00, 0x0f, 0xac, 1 };
  34 u8 RSN_CIPHER_SUITE_TKIP[] = { 0x00, 0x0f, 0xac, 2 };
  35 u8 RSN_CIPHER_SUITE_WRAP[] = { 0x00, 0x0f, 0xac, 3 };
  36 u8 RSN_CIPHER_SUITE_CCMP[] = { 0x00, 0x0f, 0xac, 4 };
  37 u8 RSN_CIPHER_SUITE_WEP104[] = { 0x00, 0x0f, 0xac, 5 };
  38 /*  */
  39 /*  for adhoc-master to generate ie and provide supported-rate to fw */
  40 /*  */
  41
  42 static u8 WIFI_CCKRATES[] = {
  43         IEEE80211_CCK_RATE_1MB | IEEE80211_BASIC_RATE_MASK,
  44         IEEE80211_CCK_RATE_2MB | IEEE80211_BASIC_RATE_MASK,
  45         IEEE80211_CCK_RATE_5MB | IEEE80211_BASIC_RATE_MASK,
  46         IEEE80211_CCK_RATE_11MB | IEEE80211_BASIC_RATE_MASK
  47 };
  48
  49 static u8 WIFI_OFDMRATES[] = {
  50          IEEE80211_OFDM_RATE_6MB,
  51          IEEE80211_OFDM_RATE_9MB,
  52          IEEE80211_OFDM_RATE_12MB,
  53          IEEE80211_OFDM_RATE_18MB,
  54          IEEE80211_OFDM_RATE_24MB,
  55          IEEE80211_OFDM_RATE_36MB,
  56          IEEE80211_OFDM_RATE_48MB,
  57          IEEE80211_OFDM_RATE_54MB
  58 };
  59
  60 int rtw_get_bit_value_from_ieee_value(u8 val)
  61 {
  62         static const unsigned char dot11_rate_table[] = {
  63                 2, 4, 11, 22, 12, 18, 24, 36, 48,
  64                 72, 96, 108, 0}; /*  last element must be zero!! */
  65         int i = 0;
  66
  67         while (dot11_rate_table[i] != 0) {
  68                 if (dot11_rate_table[i] == val)
  69                         return BIT(i);
  70                 i++;
  71         }
  72         return 0;
  73 }
  74
  75 bool rtw_is_cckrates_included(u8 *rate)
  76 {
  77         while (*rate) {
  78                 u8 r = *rate & 0x7f;
  79
  80                 if (r == 2 || r == 4 || r == 11 || r == 22)
  81                         return true;
  82                 rate++;
  83         }
  84
  85         return false;
  86 }
  87
  88 bool rtw_is_cckratesonly_included(u8 *rate)
  89 {
  90         while (*rate) {
  91                 u8 r = *rate & 0x7f;
  92
  93                 if (r != 2 && r != 4 && r != 11 && r != 22)
  94                         return false;
  95                 rate++;
  96         }
  97
  98         return true;
  99 }
 100
 101 int rtw_check_network_type(unsigned char *rate)
 102 {
 103         /*  could be pure B, pure G, or B/G */
 104         if (rtw_is_cckratesonly_included(rate))
 105                 return WIRELESS_11B;
 106         else if (rtw_is_cckrates_included(rate))
 107                 return  WIRELESS_11BG;
 108         else
 109                 return WIRELESS_11G;
 110 }
 111
 112 u8 *rtw_set_fixed_ie(void *pbuf, unsigned int len, void *source,
 113                      unsigned int *frlen)
 114 {
 115         memcpy(pbuf, source, len);
 116         *frlen = *frlen + len;
 117         return ((u8 *)pbuf) + len;
 118 }
 119
 120 /*  rtw_set_ie will update frame length */
 121 u8 *rtw_set_ie
 122 (
 123         u8 *pbuf,
 124         int index,
 125         uint len,
 126         u8 *source,
 127         uint *frlen /* frame length */
 128 )
 129 {
 130         *pbuf = (u8)index;
 131
 132         *(pbuf + 1) = (u8)len;
 133
 134         if (len > 0)
 135                 memcpy((void *)(pbuf + 2), (void *)source, len);
 136
 137         *frlen = *frlen + (len + 2);
 138
 139         return pbuf + len + 2;
 140 }
 141
 142 /*
 143  * ----------------------------------------------------------------------------
 144  * index: the information element id index, limit is the limit for search
 145  * ----------------------------------------------------------------------------
 146  */
 147 u8 *rtw_get_ie(u8 *pbuf, int index, uint *len, int limit)
 148 {
 149         int tmp, i;
 150         u8 *p;
 151
 152         if (limit < 1)
 153                 return NULL;
 154
 155         p = pbuf;
 156         i = 0;
 157         *len = 0;
 158         while (1) {
 159                 if (*p == index) {
 160                         *len = *(p + 1);
 161                         return p;
 162                 }
 163                 tmp = *(p + 1);
 164                 p += (tmp + 2);
 165                 i += (tmp + 2);
 166                 if (i >= limit)
 167                         break;
 168         }
 169         return NULL;
 170 }
 171
 172 void rtw_set_supported_rate(u8 *SupportedRates, uint mode)
 173 {
 174         memset(SupportedRates, 0, NDIS_802_11_LENGTH_RATES_EX);
 175
 176         switch (mode) {
 177         case WIRELESS_11B:
 178                 memcpy(SupportedRates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
 179                 break;
 180         case WIRELESS_11G:
 181         case WIRELESS_11A:
 182         case WIRELESS_11_5N:
 183         case WIRELESS_11A_5N:/* Todo: no basic rate for ofdm ? */
 184                 memcpy(SupportedRates, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN);
 185                 break;
 186         case WIRELESS_11BG:
 187         case WIRELESS_11G_24N:
 188         case WIRELESS_11_24N:
 189         case WIRELESS_11BG_24N:
 190                 memcpy(SupportedRates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
 191                 memcpy(SupportedRates + IEEE80211_CCK_RATE_LEN, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN);
 192                 break;
 193         }
 194 }
 195
 196 uint rtw_get_rateset_len(u8 *rateset)
 197 {
 198         uint i;
 199
 200         for (i = 0; i < 13; i++)
 201                 if (rateset[i] == 0)
 202                         break;
 203         return i;
 204 }
 205
 206 int rtw_generate_ie(struct registry_priv *pregistrypriv)
 207 {
 208         u8 wireless_mode;
 209         int rateLen;
 210         uint sz = 0;
 211         struct wlan_bssid_ex *pdev_network = &pregistrypriv->dev_network;
 212         u8 *ie = pdev_network->ies;
 213
 214         /* timestamp will be inserted by hardware */
 215         sz += 8;
 216         ie += sz;
 217
 218         /* beacon interval : 2bytes */
 219         *(__le16 *)ie = cpu_to_le16((u16)pdev_network->Configuration.BeaconPeriod);/* BCN_INTERVAL; */
 220         sz += 2;
 221         ie += 2;
 222
 223         /* capability info */
 224         *(u16 *)ie = 0;
 225
 226         *(__le16 *)ie |= cpu_to_le16(cap_IBSS);
 227
 228         if (pregistrypriv->preamble == PREAMBLE_SHORT)
 229                 *(__le16 *)ie |= cpu_to_le16(cap_ShortPremble);
 230
 231         if (pdev_network->Privacy)
 232                 *(__le16 *)ie |= cpu_to_le16(cap_Privacy);
 233
 234         sz += 2;
 235         ie += 2;
 236
 237         /* SSID */
 238         ie = rtw_set_ie(ie, _SSID_IE_, pdev_network->ssid.ssid_length, pdev_network->ssid.ssid, &sz);
 239
 240         /* supported rates */
 241         if (pregistrypriv->wireless_mode == WIRELESS_11ABGN)
 242                 wireless_mode = WIRELESS_11BG_24N;
 243         else
 244                 wireless_mode = pregistrypriv->wireless_mode;
 245
 246         rtw_set_supported_rate(pdev_network->SupportedRates, wireless_mode);
 247
 248         rateLen = rtw_get_rateset_len(pdev_network->SupportedRates);
 249
 250         if (rateLen > 8) {
 251                 ie = rtw_set_ie(ie, _SUPPORTEDRATES_IE_, 8, pdev_network->SupportedRates, &sz);
 252                 /* ie = rtw_set_ie(ie, _EXT_SUPPORTEDRATES_IE_, (rateLen - 8), (pdev_network->SupportedRates + 8), &sz); */
 253         } else {
 254                 ie = rtw_set_ie(ie, _SUPPORTEDRATES_IE_, rateLen, pdev_network->SupportedRates, &sz);
 255         }
 256
 257         /* DS parameter set */
 258         ie = rtw_set_ie(ie, _DSSET_IE_, 1, (u8 *)&pdev_network->Configuration.DSConfig, &sz);
 259
 260         /* IBSS Parameter Set */
 261
 262         ie = rtw_set_ie(ie, _IBSS_PARA_IE_, 2, (u8 *)&pdev_network->Configuration.ATIMWindow, &sz);
 263
 264         if (rateLen > 8)
 265                 ie = rtw_set_ie(ie, _EXT_SUPPORTEDRATES_IE_, (rateLen - 8), (pdev_network->SupportedRates + 8), &sz);
 266
 267         return sz;
 268 }
 269
 270 unsigned char *rtw_get_wpa_ie(unsigned char *pie, uint *wpa_ie_len, int limit)
 271 {
 272         uint len;
 273         u16 val16;
 274         __le16 le_tmp;
 275         static const unsigned char wpa_oui_type[] = {0x00, 0x50, 0xf2, 0x01};
 276         u8 *pbuf = pie;
 277         int limit_new = limit;
 278
 279         while (1) {
 280                 pbuf = rtw_get_ie(pbuf, _WPA_IE_ID_, &len, limit_new);
 281
 282                 if (pbuf) {
 283                         /* check if oui matches... */
 284                         if (memcmp((pbuf + 2), wpa_oui_type, sizeof(wpa_oui_type)))
 285                                 goto check_next_ie;
 286
 287                         /* check version... */
 288                         memcpy((u8 *)&le_tmp, (pbuf + 6), sizeof(val16));
 289
 290                         val16 = le16_to_cpu(le_tmp);
 291                         if (val16 != 0x0001)
 292                                 goto check_next_ie;
 293                         *wpa_ie_len = *(pbuf + 1);
 294                         return pbuf;
 295                 }
 296                 *wpa_ie_len = 0;
 297                 return NULL;
 298
 299 check_next_ie:
 300                 limit_new = limit - (pbuf - pie) - 2 - len;
 301                 if (limit_new <= 0)
 302                         break;
 303                 pbuf += (2 + len);
 304         }
 305         *wpa_ie_len = 0;
 306         return NULL;
 307 }
 308
 309 unsigned char *rtw_get_wpa2_ie(unsigned char *pie, uint *rsn_ie_len, int limit)
 310 {
 311         return rtw_get_ie(pie, _WPA2_IE_ID_, rsn_ie_len, limit);
 312 }
 313
 314 int rtw_get_wpa_cipher_suite(u8 *s)
 315 {
 316         if (!memcmp(s, WPA_CIPHER_SUITE_NONE, WPA_SELECTOR_LEN))
 317                 return WPA_CIPHER_NONE;
 318         if (!memcmp(s, WPA_CIPHER_SUITE_WEP40, WPA_SELECTOR_LEN))
 319                 return WPA_CIPHER_WEP40;
 320         if (!memcmp(s, WPA_CIPHER_SUITE_TKIP, WPA_SELECTOR_LEN))
 321                 return WPA_CIPHER_TKIP;
 322         if (!memcmp(s, WPA_CIPHER_SUITE_CCMP, WPA_SELECTOR_LEN))
 323                 return WPA_CIPHER_CCMP;
 324         if (!memcmp(s, WPA_CIPHER_SUITE_WEP104, WPA_SELECTOR_LEN))
 325                 return WPA_CIPHER_WEP104;
 326
 327         return 0;
 328 }
 329
 330 int rtw_get_wpa2_cipher_suite(u8 *s)
 331 {
 332         if (!memcmp(s, RSN_CIPHER_SUITE_NONE, RSN_SELECTOR_LEN))
 333                 return WPA_CIPHER_NONE;
 334         if (!memcmp(s, RSN_CIPHER_SUITE_WEP40, RSN_SELECTOR_LEN))
 335                 return WPA_CIPHER_WEP40;
 336         if (!memcmp(s, RSN_CIPHER_SUITE_TKIP, RSN_SELECTOR_LEN))
 337                 return WPA_CIPHER_TKIP;
 338         if (!memcmp(s, RSN_CIPHER_SUITE_CCMP, RSN_SELECTOR_LEN))
 339                 return WPA_CIPHER_CCMP;
 340         if (!memcmp(s, RSN_CIPHER_SUITE_WEP104, RSN_SELECTOR_LEN))
 341                 return WPA_CIPHER_WEP104;
 342
 343         return 0;
 344 }
 345
 346 int rtw_parse_wpa_ie(u8 *wpa_ie, int wpa_ie_len, int *group_cipher, int *pairwise_cipher, int *is_8021x)
 347 {
 348         int i, ret = _SUCCESS;
 349         int left, count;
 350         u8 *pos;
 351         u8 SUITE_1X[4] = {0x00, 0x50, 0xf2, 1};
 352
 353         if (wpa_ie_len <= 0) {
 354                 /* No WPA IE - fail silently */
 355                 return _FAIL;
 356         }
 357
 358         if ((*wpa_ie != _WPA_IE_ID_) || (*(wpa_ie + 1) != (u8)(wpa_ie_len - 2)) ||
 359             (memcmp(wpa_ie + 2, RTW_WPA_OUI_TYPE, WPA_SELECTOR_LEN)))
 360                 return _FAIL;
 361
 362         pos = wpa_ie;
 363
 364         pos += 8;
 365         left = wpa_ie_len - 8;
 366
 367         /* group_cipher */
 368         if (left >= WPA_SELECTOR_LEN) {
 369                 *group_cipher = rtw_get_wpa_cipher_suite(pos);
 370                 pos += WPA_SELECTOR_LEN;
 371                 left -= WPA_SELECTOR_LEN;
 372         } else if (left > 0) {
 373                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie length mismatch, %u too much", __func__, left));
 374                 return _FAIL;
 375         }
 376
 377         /* pairwise_cipher */
 378         if (left >= 2) {
 379                 count = get_unaligned_le16(pos);
 380                 pos += 2;
 381                 left -= 2;
 382
 383                 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
 384                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie count botch (pairwise), count %u left %u",
 385                                                 __func__, count, left));
 386                         return _FAIL;
 387                 }
 388
 389                 for (i = 0; i < count; i++) {
 390                         *pairwise_cipher |= rtw_get_wpa_cipher_suite(pos);
 391
 392                         pos += WPA_SELECTOR_LEN;
 393                         left -= WPA_SELECTOR_LEN;
 394                 }
 395         } else if (left == 1) {
 396                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie too short (for key mgmt)",   __func__));
 397                 return _FAIL;
 398         }
 399
 400         if (is_8021x) {
 401                 if (left >= 6) {
 402                         pos += 2;
 403                         if (!memcmp(pos, SUITE_1X, 4)) {
 404                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s : there has 802.1x auth\n", __func__));
 405                                 *is_8021x = 1;
 406                         }
 407                 }
 408         }
 409
 410         return ret;
 411 }
 412
 413 int rtw_parse_wpa2_ie(u8 *rsn_ie, int rsn_ie_len, int *group_cipher, int *pairwise_cipher, int *is_8021x)
 414 {
 415         int i, ret = _SUCCESS;
 416         int left, count;
 417         u8 *pos;
 418         u8 SUITE_1X[4] = {0x00, 0x0f, 0xac, 0x01};
 419
 420         if (rsn_ie_len <= 0) {
 421                 /* No RSN IE - fail silently */
 422                 return _FAIL;
 423         }
 424
 425         if ((*rsn_ie != _WPA2_IE_ID_) || (*(rsn_ie + 1) != (u8)(rsn_ie_len - 2)))
 426                 return _FAIL;
 427
 428         pos = rsn_ie;
 429         pos += 4;
 430         left = rsn_ie_len - 4;
 431
 432         /* group_cipher */
 433         if (left >= RSN_SELECTOR_LEN) {
 434                 *group_cipher = rtw_get_wpa2_cipher_suite(pos);
 435
 436                 pos += RSN_SELECTOR_LEN;
 437                 left -= RSN_SELECTOR_LEN;
 438
 439         } else if (left > 0) {
 440                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie length mismatch, %u too much", __func__, left));
 441                 return _FAIL;
 442         }
 443
 444         /* pairwise_cipher */
 445         if (left >= 2) {
 446                 count = get_unaligned_le16(pos);
 447                 pos += 2;
 448                 left -= 2;
 449
 450                 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
 451                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie count botch (pairwise), count %u left %u",
 452                                                 __func__, count, left));
 453                         return _FAIL;
 454                 }
 455
 456                 for (i = 0; i < count; i++) {
 457                         *pairwise_cipher |= rtw_get_wpa2_cipher_suite(pos);
 458
 459                         pos += RSN_SELECTOR_LEN;
 460                         left -= RSN_SELECTOR_LEN;
 461                 }
 462
 463         } else if (left == 1) {
 464                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie too short (for key mgmt)",  __func__));
 465
 466                 return _FAIL;
 467         }
 468
 469         if (is_8021x) {
 470                 if (left >= 6) {
 471                         pos += 2;
 472                         if (!memcmp(pos, SUITE_1X, 4)) {
 473                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s (): there has 802.1x auth\n", __func__));
 474                                 *is_8021x = 1;
 475                         }
 476                 }
 477         }
 478         return ret;
 479 }
 480
 481 void rtw_get_sec_ie(u8 *in_ie, uint in_len, u8 *rsn_ie, u16 *rsn_len, u8 *wpa_ie, u16 *wpa_len)
 482 {
 483         u8 authmode, sec_idx, i;
 484         u8 wpa_oui[4] = {0x0, 0x50, 0xf2, 0x01};
 485         uint cnt;
 486
 487         /* Search required WPA or WPA2 IE and copy to sec_ie[] */
 488
 489         cnt = _TIMESTAMP_ + _BEACON_ITERVAL_ + _CAPABILITY_;
 490
 491         sec_idx = 0;
 492
 493         while (cnt < in_len) {
 494                 authmode = in_ie[cnt];
 495
 496                 if ((authmode == _WPA_IE_ID_) && (!memcmp(&in_ie[cnt + 2], &wpa_oui[0], 4))) {
 497                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 498                                  ("\n rtw_get_wpa_ie: sec_idx =%d in_ie[cnt+1]+2 =%d\n",
 499                                  sec_idx, in_ie[cnt + 1] + 2));
 500
 501                         if (wpa_ie) {
 502                                 memcpy(wpa_ie, &in_ie[cnt], in_ie[cnt + 1] + 2);
 503
 504                                 for (i = 0; i < (in_ie[cnt + 1] + 2); i += 8) {
 505                                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 506                                                  ("\n %2x,%2x,%2x,%2x,%2x,%2x,%2x,%2x\n",
 507                                                  wpa_ie[i], wpa_ie[i + 1], wpa_ie[i + 2], wpa_ie[i + 3], wpa_ie[i + 4],
 508                                                  wpa_ie[i + 5], wpa_ie[i + 6], wpa_ie[i + 7]));
 509                                 }
 510                         }
 511
 512                         *wpa_len = in_ie[cnt + 1] + 2;
 513                         cnt += in_ie[cnt + 1] + 2;  /* get next */
 514                 } else {
 515                         if (authmode == _WPA2_IE_ID_) {
 516                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 517                                          ("\n get_rsn_ie: sec_idx =%d in_ie[cnt+1]+2 =%d\n",
 518                                          sec_idx, in_ie[cnt + 1] + 2));
 519
 520                                 if (rsn_ie) {
 521                                         memcpy(rsn_ie, &in_ie[cnt], in_ie[cnt + 1] + 2);
 522
 523                                         for (i = 0; i < (in_ie[cnt + 1] + 2); i += 8) {
 524                                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 525                                                          ("\n %2x,%2x,%2x,%2x,%2x,%2x,%2x,%2x\n",
 526                                                          rsn_ie[i], rsn_ie[i + 1], rsn_ie[i + 2], rsn_ie[i + 3], rsn_ie[i + 4],
 527                                                          rsn_ie[i + 5], rsn_ie[i + 6], rsn_ie[i + 7]));
 528                                                 }
 529                                 }
 530
 531                                 *rsn_len = in_ie[cnt + 1] + 2;
 532                                 cnt += in_ie[cnt + 1] + 2;  /* get next */
 533                         } else {
 534                                 cnt += in_ie[cnt + 1] + 2;   /* get next */
 535                         }
 536                 }
 537         }
 538 }
 539
 540 u8 rtw_is_wps_ie(u8 *ie_ptr, uint *wps_ielen)
 541 {
 542         u8 match = false;
 543         u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04};
 544
 545         if (!ie_ptr)
 546                 return match;
 547
 548         eid = ie_ptr[0];
 549
 550         if ((eid == _WPA_IE_ID_) && (!memcmp(&ie_ptr[2], wps_oui, 4))) {
 551                 *wps_ielen = ie_ptr[1] + 2;
 552                 match = true;
 553         }
 554         return match;
 555 }
 556
 557 /**
 558  * rtw_get_wps_ie - Search WPS IE from a series of ies
 559  * @in_ie: Address of ies to search
 560  * @in_len: Length limit from in_ie
 561  * @wps_ie: If not NULL and WPS IE is found, WPS IE will be copied to the buf starting from wps_ie
 562  * @wps_ielen: If not NULL and WPS IE is found, will set to the length of the entire WPS IE
 563  *
 564  * Returns: The address of the WPS IE found, or NULL
 565  */
 566 u8 *rtw_get_wps_ie(u8 *in_ie, uint in_len, u8 *wps_ie, uint *wps_ielen)
 567 {
 568         uint cnt;
 569         u8 *wpsie_ptr = NULL;
 570         u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04};
 571
 572         if (wps_ielen)
 573                 *wps_ielen = 0;
 574
 575         if (!in_ie || in_len <= 0)
 576                 return wpsie_ptr;
 577
 578         cnt = 0;
 579
 580         while (cnt < in_len) {
 581                 eid = in_ie[cnt];
 582
 583                 if ((eid == _WPA_IE_ID_) && (!memcmp(&in_ie[cnt + 2], wps_oui, 4))) {
 584                         wpsie_ptr = &in_ie[cnt];
 585
 586                         if (wps_ie)
 587                                 memcpy(wps_ie, &in_ie[cnt], in_ie[cnt + 1] + 2);
 588
 589                         if (wps_ielen)
 590                                 *wps_ielen = in_ie[cnt + 1] + 2;
 591
 592                         cnt += in_ie[cnt + 1] + 2;
 593
 594                         break;
 595                 }
 596                 cnt += in_ie[cnt + 1] + 2; /* goto next */
 597         }
 598         return wpsie_ptr;
 599 }
 600
 601 /**
 602  * rtw_get_wps_attr - Search a specific WPS attribute from a given WPS IE
 603  * @wps_ie: Address of WPS IE to search
 604  * @wps_ielen: Length limit from wps_ie
 605  * @target_attr_id: The attribute ID of WPS attribute to search
 606  * @buf_attr: If not NULL and the WPS attribute is found, WPS attribute will be copied to the buf starting from buf_attr
 607  * @len_attr: If not NULL and the WPS attribute is found, will set to the length of the entire WPS attribute
 608  *
 609  * Returns: the address of the specific WPS attribute found, or NULL
 610  */
 611 u8 *rtw_get_wps_attr(u8 *wps_ie, uint wps_ielen, u16 target_attr_id, u8 *buf_attr, u32 *len_attr)
 612 {
 613         u8 *attr_ptr = NULL;
 614         u8 *target_attr_ptr = NULL;
 615         u8 wps_oui[4] = {0x00, 0x50, 0xF2, 0x04};
 616
 617         if (len_attr)
 618                 *len_attr = 0;
 619
 620         if ((wps_ie[0] != _VENDOR_SPECIFIC_IE_) ||
 621             (memcmp(wps_ie + 2, wps_oui, 4)))
 622                 return attr_ptr;
 623
 624         /*  6 = 1(Element ID) + 1(Length) + 4(WPS OUI) */
 625         attr_ptr = wps_ie + 6; /* goto first attr */
 626
 627         while (attr_ptr - wps_ie < wps_ielen) {
 628                 /*  4 = 2(Attribute ID) + 2(Length) */
 629                 u16 attr_id = get_unaligned_be16(attr_ptr);
 630                 u16 attr_data_len = get_unaligned_be16(attr_ptr + 2);
 631                 u16 attr_len = attr_data_len + 4;
 632
 633                 if (attr_id == target_attr_id) {
 634                         target_attr_ptr = attr_ptr;
 635                         if (buf_attr)
 636                                 memcpy(buf_attr, attr_ptr, attr_len);
 637                         if (len_attr)
 638                                 *len_attr = attr_len;
 639                         break;
 640                 }
 641                 attr_ptr += attr_len; /* goto next */
 642         }
 643         return target_attr_ptr;
 644 }
 645
 646 /**
 647  * rtw_get_wps_attr_content - Search a specific WPS attribute content from a given WPS IE
 648  * @wps_ie: Address of WPS IE to search
 649  * @wps_ielen: Length limit from wps_ie
 650  * @target_attr_id: The attribute ID of WPS attribute to search
 651  * @buf_content: If not NULL and the WPS attribute is found, WPS attribute content will be copied to the buf starting from buf_content
 652  * @len_content: If not NULL and the WPS attribute is found, will set to the length of the WPS attribute content
 653  *
 654  * Returns: the address of the specific WPS attribute content found, or NULL
 655  */
 656 u8 *rtw_get_wps_attr_content(u8 *wps_ie, uint wps_ielen, u16 target_attr_id, u8 *buf_content, uint *len_content)
 657 {
 658         u8 *attr_ptr;
 659         u32 attr_len;
 660
 661         if (len_content)
 662                 *len_content = 0;
 663
 664         attr_ptr = rtw_get_wps_attr(wps_ie, wps_ielen, target_attr_id, NULL, &attr_len);
 665
 666         if (attr_ptr && attr_len) {
 667                 if (buf_content)
 668                         memcpy(buf_content, attr_ptr + 4, attr_len - 4);
 669
 670                 if (len_content)
 671                         *len_content = attr_len - 4;
 672
 673                 return attr_ptr + 4;
 674         }
 675
 676         return NULL;
 677 }
 678
 679 static int rtw_ieee802_11_parse_vendor_specific(u8 *pos, uint elen,
 680                                                 struct rtw_ieee802_11_elems *elems, int show_errors)
 681 {
 682         unsigned int oui;
 683
 684         /*
 685          * first 3 bytes in vendor specific information element are the IEEE
 686          * OUI of the vendor. The following byte is used a vendor specific
 687          * sub-type.
 688          */
 689         if (elen < 4) {
 690                 if (show_errors) {
 691                         DBG_88E("short vendor specific information element ignored (len=%lu)\n",
 692                                 (unsigned long)elen);
 693                 }
 694                 return -1;
 695         }
 696
 697         oui = RTW_GET_BE24(pos);
 698         switch (oui) {
 699         case OUI_MICROSOFT:
 700                 /*
 701                  * Microsoft/Wi-Fi information elements are further typed and
 702                  * subtyped
 703                  */
 704                 switch (pos[3]) {
 705                 case 1:
 706                         /*
 707                          * Microsoft OUI (00:50:F2) with OUI Type 1:
 708                          * real WPA information element
 709                          */
 710                         elems->wpa_ie = pos;
 711                         elems->wpa_ie_len = elen;
 712                         break;
 713                 case WME_OUI_TYPE: /* this is a Wi-Fi WME info. element */
 714                         if (elen < 5) {
 715                                 DBG_88E("short WME information element ignored (len=%lu)\n",
 716                                         (unsigned long)elen);
 717                                 return -1;
 718                         }
 719                         switch (pos[4]) {
 720                         case WME_OUI_SUBTYPE_INFORMATION_ELEMENT:
 721                         case WME_OUI_SUBTYPE_PARAMETER_ELEMENT:
 722                                 elems->wme = pos;
 723                                 elems->wme_len = elen;
 724                                 break;
 725                         case WME_OUI_SUBTYPE_TSPEC_ELEMENT:
 726                                 elems->wme_tspec = pos;
 727                                 elems->wme_tspec_len = elen;
 728                                 break;
 729                         default:
 730                                 DBG_88E("unknown WME information element ignored (subtype=%d len=%lu)\n",
 731                                         pos[4], (unsigned long)elen);
 732                                 return -1;
 733                         }
 734                         break;
 735                 case 4:
 736                         /* Wi-Fi Protected Setup (WPS) IE */
 737                         elems->wps_ie = pos;
 738                         elems->wps_ie_len = elen;
 739                         break;
 740                 default:
 741                         DBG_88E("Unknown Microsoft information element ignored (type=%d len=%lu)\n",
 742                                 pos[3], (unsigned long)elen);
 743                         return -1;
 744                 }
 745                 break;
 746
 747         case OUI_BROADCOM:
 748                 switch (pos[3]) {
 749                 case VENDOR_HT_CAPAB_OUI_TYPE:
 750                         elems->vendor_ht_cap = pos;
 751                         elems->vendor_ht_cap_len = elen;
 752                         break;
 753                 default:
 754                         DBG_88E("Unknown Broadcom information element ignored (type=%d len=%lu)\n",
 755                                 pos[3], (unsigned long)elen);
 756                         return -1;
 757                 }
 758                 break;
 759         default:
 760                 DBG_88E("unknown vendor specific information element ignored (vendor OUI %3phC len=%lu)\n",
 761                         pos, (unsigned long)elen);
 762                 return -1;
 763         }
 764         return 0;
 765 }
 766
 767 /**
 768  * ieee802_11_parse_elems - Parse information elements in management frames
 769  * @start: Pointer to the start of ies
 770  * @len: Length of IE buffer in octets
 771  * @elems: Data structure for parsed elements
 772  * @show_errors: Whether to show parsing errors in debug log
 773  * Returns: Parsing result
 774  */
 775 enum parse_res rtw_ieee802_11_parse_elems(u8 *start, uint len,
 776                                           struct rtw_ieee802_11_elems *elems,
 777                                           int show_errors)
 778 {
 779         uint left = len;
 780         u8 *pos = start;
 781         int unknown = 0;
 782
 783         memset(elems, 0, sizeof(*elems));
 784
 785         while (left >= 2) {
 786                 u8 id, elen;
 787
 788                 id = *pos++;
 789                 elen = *pos++;
 790                 left -= 2;
 791
 792                 if (elen > left) {
 793                         if (show_errors) {
 794                                 DBG_88E("IEEE 802.11 element parse failed (id=%d elen=%d left=%lu)\n",
 795                                         id, elen, (unsigned long)left);
 796                         }
 797                         return ParseFailed;
 798                 }
 799
 800                 switch (id) {
 801                 case WLAN_EID_SSID:
 802                         elems->ssid = pos;
 803                         elems->ssid_len = elen;
 804                         break;
 805                 case WLAN_EID_SUPP_RATES:
 806                         elems->supp_rates = pos;
 807                         elems->supp_rates_len = elen;
 808                         break;
 809                 case WLAN_EID_FH_PARAMS:
 810                         elems->fh_params = pos;
 811                         elems->fh_params_len = elen;
 812                         break;
 813                 case WLAN_EID_DS_PARAMS:
 814                         elems->ds_params = pos;
 815                         elems->ds_params_len = elen;
 816                         break;
 817                 case WLAN_EID_CF_PARAMS:
 818                         elems->cf_params = pos;
 819                         elems->cf_params_len = elen;
 820                         break;
 821                 case WLAN_EID_TIM:
 822                         elems->tim = pos;
 823                         elems->tim_len = elen;
 824                         break;
 825                 case WLAN_EID_IBSS_PARAMS:
 826                         elems->ibss_params = pos;
 827                         elems->ibss_params_len = elen;
 828                         break;
 829                 case WLAN_EID_CHALLENGE:
 830                         elems->challenge = pos;
 831                         elems->challenge_len = elen;
 832                         break;
 833                 case WLAN_EID_ERP_INFO:
 834                         elems->erp_info = pos;
 835                         elems->erp_info_len = elen;
 836                         break;
 837                 case WLAN_EID_EXT_SUPP_RATES:
 838                         elems->ext_supp_rates = pos;
 839                         elems->ext_supp_rates_len = elen;
 840                         break;
 841                 case WLAN_EID_VENDOR_SPECIFIC:
 842                         if (rtw_ieee802_11_parse_vendor_specific(pos, elen, elems, show_errors))
 843                                 unknown++;
 844                         break;
 845                 case WLAN_EID_RSN:
 846                         elems->rsn_ie = pos;
 847                         elems->rsn_ie_len = elen;
 848                         break;
 849                 case WLAN_EID_PWR_CAPABILITY:
 850                         elems->power_cap = pos;
 851                         elems->power_cap_len = elen;
 852                         break;
 853                 case WLAN_EID_SUPPORTED_CHANNELS:
 854                         elems->supp_channels = pos;
 855                         elems->supp_channels_len = elen;
 856                         break;
 857                 case WLAN_EID_MOBILITY_DOMAIN:
 858                         elems->mdie = pos;
 859                         elems->mdie_len = elen;
 860                         break;
 861                 case WLAN_EID_FAST_BSS_TRANSITION:
 862                         elems->ftie = pos;
 863                         elems->ftie_len = elen;
 864                         break;
 865                 case WLAN_EID_TIMEOUT_INTERVAL:
 866                         elems->timeout_int = pos;
 867                         elems->timeout_int_len = elen;
 868                         break;
 869                 case WLAN_EID_HT_CAPABILITY:
 870                         elems->ht_capabilities = pos;
 871                         elems->ht_capabilities_len = elen;
 872                         break;
 873                 case WLAN_EID_HT_OPERATION:
 874                         elems->ht_operation = pos;
 875                         elems->ht_operation_len = elen;
 876                         break;
 877                 default:
 878                         unknown++;
 879                         if (!show_errors)
 880                                 break;
 881                         DBG_88E("IEEE 802.11 element parse ignored unknown element (id=%d elen=%d)\n",
 882                                 id, elen);
 883                         break;
 884                 }
 885                 left -= elen;
 886                 pos += elen;
 887         }
 888         if (left)
 889                 return ParseFailed;
 890         return unknown ? ParseUnknown : ParseOK;
 891 }
 892
 893 void rtw_macaddr_cfg(u8 *mac_addr)
 894 {
 895         u8 mac[ETH_ALEN];
 896
 897         if (!mac_addr)
 898                 return;
 899
 900         if (rtw_initmac && mac_pton(rtw_initmac, mac)) {
 901                 /* Users specify the mac address */
 902                 ether_addr_copy(mac_addr, mac);
 903         } else {
 904                 /* Use the mac address stored in the Efuse */
 905                 ether_addr_copy(mac, mac_addr);
 906         }
 907
 908         if (is_broadcast_ether_addr(mac) || is_zero_ether_addr(mac)) {
 909                 eth_random_addr(mac_addr);
 910                 DBG_88E("MAC Address from efuse error, assign random one !!!\n");
 911         }
 912
 913         DBG_88E("%s MAC Address  = %pM\n", __func__, mac_addr);
 914 }
 915
 916 static int rtw_get_cipher_info(struct wlan_network *pnetwork)
 917 {
 918         uint wpa_ielen;
 919         unsigned char *pbuf;
 920         int group_cipher = 0, pairwise_cipher = 0, is8021x = 0;
 921         int ret = _FAIL;
 922
 923         pbuf = rtw_get_wpa_ie(&pnetwork->network.ies[12], &wpa_ielen, pnetwork->network.ie_length - 12);
 924
 925         if (pbuf && (wpa_ielen > 0)) {
 926                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: wpa_ielen: %d", __func__, wpa_ielen));
 927                 if (rtw_parse_wpa_ie(pbuf, wpa_ielen + 2, &group_cipher, &pairwise_cipher, &is8021x) == _SUCCESS) {
 928                         pnetwork->BcnInfo.pairwise_cipher = pairwise_cipher;
 929                         pnetwork->BcnInfo.group_cipher = group_cipher;
 930                         pnetwork->BcnInfo.is_8021x = is8021x;
 931                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 932                                  ("%s: pnetwork->pairwise_cipher: %d, is_8021x is %d",
 933                                   __func__, pnetwork->BcnInfo.pairwise_cipher,
 934                                   pnetwork->BcnInfo.is_8021x));
 935                         ret = _SUCCESS;
 936                 }
 937         } else {
 938                 pbuf = rtw_get_wpa2_ie(&pnetwork->network.ies[12], &wpa_ielen, pnetwork->network.ie_length - 12);
 939
 940                 if (pbuf && (wpa_ielen > 0)) {
 941                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("get RSN IE\n"));
 942                         if (rtw_parse_wpa2_ie(pbuf, wpa_ielen + 2, &group_cipher, &pairwise_cipher, &is8021x) == _SUCCESS) {
 943                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("get RSN IE  OK!!!\n"));
 944                                 pnetwork->BcnInfo.pairwise_cipher = pairwise_cipher;
 945                                 pnetwork->BcnInfo.group_cipher = group_cipher;
 946                                 pnetwork->BcnInfo.is_8021x = is8021x;
 947                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: pnetwork->pairwise_cipher: %d, pnetwork->group_cipher is %d, is_8021x is %d",
 948                                                         __func__, pnetwork->BcnInfo.pairwise_cipher,
 949                                                         pnetwork->BcnInfo.group_cipher, pnetwork->BcnInfo.is_8021x));
 950                                 ret = _SUCCESS;
 951                         }
 952                 }
 953         }
 954
 955         return ret;
 956 }
 957
 958 void rtw_get_bcn_info(struct wlan_network *pnetwork)
 959 {
 960         unsigned short cap = 0;
 961         u8 bencrypt = 0;
 962         __le16 le_tmp;
 963         u16 wpa_len = 0, rsn_len = 0;
 964         struct HT_info_element *pht_info = NULL;
 965         uint len;
 966         unsigned char *p;
 967
 968         memcpy(&le_tmp, rtw_get_capability_from_ie(pnetwork->network.ies), 2);
 969         cap = le16_to_cpu(le_tmp);
 970         if (cap & WLAN_CAPABILITY_PRIVACY) {
 971                 bencrypt = 1;
 972                 pnetwork->network.Privacy = 1;
 973         } else {
 974                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_OPENSYS;
 975         }
 976         rtw_get_sec_ie(pnetwork->network.ies, pnetwork->network.ie_length, NULL, &rsn_len, NULL, &wpa_len);
 977         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: ssid =%s\n", __func__, pnetwork->network.ssid.ssid));
 978         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: wpa_len =%d rsn_len =%d\n", __func__, wpa_len, rsn_len));
 979         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: ssid =%s\n", __func__, pnetwork->network.ssid.ssid));
 980         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: wpa_len =%d rsn_len =%d\n", __func__, wpa_len, rsn_len));
 981
 982         if (rsn_len > 0) {
 983                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA2;
 984         } else if (wpa_len > 0) {
 985                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA;
 986         } else {
 987                 if (bencrypt)
 988                         pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WEP;
 989         }
 990         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: pnetwork->encryp_protocol is %x\n",
 991                                                         __func__, pnetwork->BcnInfo.encryp_protocol));
 992         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: pnetwork->encryp_protocol is %x\n",
 993                                                         __func__, pnetwork->BcnInfo.encryp_protocol));
 994         rtw_get_cipher_info(pnetwork);
 995
 996         /* get bwmode and ch_offset */
 997         /* parsing HT_CAP_IE */
 998         p = rtw_get_ie(pnetwork->network.ies + _FIXED_IE_LENGTH_, _HT_CAPABILITY_IE_, &len, pnetwork->network.ie_length - _FIXED_IE_LENGTH_);
 999         if (p && len > 0) {
1000                 struct ieee80211_ht_cap *ht_cap =
1001                         (struct ieee80211_ht_cap *)(p + 2);
1002
1003                 pnetwork->BcnInfo.ht_cap_info = le16_to_cpu(ht_cap->cap_info);
1004         } else {
1005                 pnetwork->BcnInfo.ht_cap_info = 0;
1006         }
1007         /* parsing HT_INFO_IE */
1008         p = rtw_get_ie(pnetwork->network.ies + _FIXED_IE_LENGTH_, _HT_ADD_INFO_IE_, &len, pnetwork->network.ie_length - _FIXED_IE_LENGTH_);
1009         if (p && len > 0) {
1010                 pht_info = (struct HT_info_element *)(p + 2);
1011                 pnetwork->BcnInfo.ht_info_infos_0 = pht_info->infos[0];
1012         } else {
1013                 pnetwork->BcnInfo.ht_info_infos_0 = 0;
1014         }
1015 }
1016
1017 /* show MCS rate, unit: 100Kbps */
1018 u16 rtw_mcs_rate(u8 rf_type, u8 bw_40MHz, u8 short_GI_20, u8 short_GI_40, unsigned char *MCS_rate)
1019 {
1020         u16 max_rate = 0;
1021
1022         if (rf_type == RF_1T1R) {
1023                 if (MCS_rate[0] & BIT(7))
1024                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 1500 : 1350) : ((short_GI_20) ? 722 : 650);
1025                 else if (MCS_rate[0] & BIT(6))
1026                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 1350 : 1215) : ((short_GI_20) ? 650 : 585);
1027                 else if (MCS_rate[0] & BIT(5))
1028                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 1200 : 1080) : ((short_GI_20) ? 578 : 520);
1029                 else if (MCS_rate[0] & BIT(4))
1030                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 900 : 810) : ((short_GI_20) ? 433 : 390);
1031                 else if (MCS_rate[0] & BIT(3))
1032                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 600 : 540) : ((short_GI_20) ? 289 : 260);
1033                 else if (MCS_rate[0] & BIT(2))
1034                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 450 : 405) : ((short_GI_20) ? 217 : 195);
1035                 else if (MCS_rate[0] & BIT(1))
1036                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 300 : 270) : ((short_GI_20) ? 144 : 130);
1037                 else if (MCS_rate[0] & BIT(0))
1038                         max_rate = (bw_40MHz) ? ((short_GI_40) ? 150 : 135) : ((short_GI_20) ? 72 : 65);
1039         } else {
1040                 if (MCS_rate[1]) {
1041                         if (MCS_rate[1] & BIT(7))
1042                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 3000 : 2700) : ((short_GI_20) ? 1444 : 1300);
1043                         else if (MCS_rate[1] & BIT(6))
1044                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 2700 : 2430) : ((short_GI_20) ? 1300 : 1170);
1045                         else if (MCS_rate[1] & BIT(5))
1046                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 2400 : 2160) : ((short_GI_20) ? 1156 : 1040);
1047                         else if (MCS_rate[1] & BIT(4))
1048                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 1800 : 1620) : ((short_GI_20) ? 867 : 780);
1049                         else if (MCS_rate[1] & BIT(3))
1050                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 1200 : 1080) : ((short_GI_20) ? 578 : 520);
1051                         else if (MCS_rate[1] & BIT(2))
1052                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 900 : 810) : ((short_GI_20) ? 433 : 390);
1053                         else if (MCS_rate[1] & BIT(1))
1054                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 600 : 540) : ((short_GI_20) ? 289 : 260);
1055                         else if (MCS_rate[1] & BIT(0))
1056                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 300 : 270) : ((short_GI_20) ? 144 : 130);
1057                 } else {
1058                         if (MCS_rate[0] & BIT(7))
1059                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 1500 : 1350) : ((short_GI_20) ? 722 : 650);
1060                         else if (MCS_rate[0] & BIT(6))
1061                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 1350 : 1215) : ((short_GI_20) ? 650 : 585);
1062                         else if (MCS_rate[0] & BIT(5))
1063                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 1200 : 1080) : ((short_GI_20) ? 578 : 520);
1064                         else if (MCS_rate[0] & BIT(4))
1065                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 900 : 810) : ((short_GI_20) ? 433 : 390);
1066                         else if (MCS_rate[0] & BIT(3))
1067                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 600 : 540) : ((short_GI_20) ? 289 : 260);
1068                         else if (MCS_rate[0] & BIT(2))
1069                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 450 : 405) : ((short_GI_20) ? 217 : 195);
1070                         else if (MCS_rate[0] & BIT(1))
1071                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 300 : 270) : ((short_GI_20) ? 144 : 130);
1072                         else if (MCS_rate[0] & BIT(0))
1073                                 max_rate = (bw_40MHz) ? ((short_GI_40) ? 150 : 135) : ((short_GI_20) ? 72 : 65);
1074                 }
1075         }
1076         return max_rate;
1077 }