drivers/staging/rtl8723bs/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 <drv_types.h>
  10 #include <rtw_debug.h>
  11 #include <linux/of.h>
  12 #include <asm/unaligned.h>
  13
  14 u8 RTW_WPA_OUI_TYPE[] = { 0x00, 0x50, 0xf2, 1 };
  15 u16 RTW_WPA_VERSION = 1;
  16 u8 WPA_AUTH_KEY_MGMT_NONE[] = { 0x00, 0x50, 0xf2, 0 };
  17 u8 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x50, 0xf2, 1 };
  18 u8 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x50, 0xf2, 2 };
  19 u8 WPA_CIPHER_SUITE_NONE[] = { 0x00, 0x50, 0xf2, 0 };
  20 u8 WPA_CIPHER_SUITE_WEP40[] = { 0x00, 0x50, 0xf2, 1 };
  21 u8 WPA_CIPHER_SUITE_TKIP[] = { 0x00, 0x50, 0xf2, 2 };
  22 u8 WPA_CIPHER_SUITE_WRAP[] = { 0x00, 0x50, 0xf2, 3 };
  23 u8 WPA_CIPHER_SUITE_CCMP[] = { 0x00, 0x50, 0xf2, 4 };
  24 u8 WPA_CIPHER_SUITE_WEP104[] = { 0x00, 0x50, 0xf2, 5 };
  25
  26 u16 RSN_VERSION_BSD = 1;
  27 u8 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x0f, 0xac, 1 };
  28 u8 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x0f, 0xac, 2 };
  29 u8 RSN_CIPHER_SUITE_NONE[] = { 0x00, 0x0f, 0xac, 0 };
  30 u8 RSN_CIPHER_SUITE_WEP40[] = { 0x00, 0x0f, 0xac, 1 };
  31 u8 RSN_CIPHER_SUITE_TKIP[] = { 0x00, 0x0f, 0xac, 2 };
  32 u8 RSN_CIPHER_SUITE_WRAP[] = { 0x00, 0x0f, 0xac, 3 };
  33 u8 RSN_CIPHER_SUITE_CCMP[] = { 0x00, 0x0f, 0xac, 4 };
  34 u8 RSN_CIPHER_SUITE_WEP104[] = { 0x00, 0x0f, 0xac, 5 };
  35 /*  */
  36 /*  for adhoc-master to generate ie and provide supported-rate to fw */
  37 /*  */
  38
  39 static u8 WIFI_CCKRATES[] = {
  40                 (IEEE80211_CCK_RATE_1MB | IEEE80211_BASIC_RATE_MASK),
  41                 (IEEE80211_CCK_RATE_2MB | IEEE80211_BASIC_RATE_MASK),
  42                 (IEEE80211_CCK_RATE_5MB | IEEE80211_BASIC_RATE_MASK),
  43                 (IEEE80211_CCK_RATE_11MB | IEEE80211_BASIC_RATE_MASK)
  44 };
  45
  46 static u8 WIFI_OFDMRATES[] = {
  47                 (IEEE80211_OFDM_RATE_6MB),
  48                 (IEEE80211_OFDM_RATE_9MB),
  49                 (IEEE80211_OFDM_RATE_12MB),
  50                 (IEEE80211_OFDM_RATE_18MB),
  51                 (IEEE80211_OFDM_RATE_24MB),
  52                 IEEE80211_OFDM_RATE_36MB,
  53                 IEEE80211_OFDM_RATE_48MB,
  54                 IEEE80211_OFDM_RATE_54MB
  55 };
  56
  57 int rtw_get_bit_value_from_ieee_value(u8 val)
  58 {
  59         unsigned char dot11_rate_table[] = {2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108, 0}; /*  last element must be zero!! */
  60         int i = 0;
  61
  62         while (dot11_rate_table[i] != 0) {
  63                 if (dot11_rate_table[i] == val)
  64                         return BIT(i);
  65                 i++;
  66         }
  67         return 0;
  68 }
  69
  70 bool rtw_is_cckrates_included(u8 *rate)
  71 {
  72         while (*rate) {
  73                 u8 r = *rate & 0x7f;
  74
  75                 if (r == 2 || r == 4 || r == 11 || r == 22)
  76                         return true;
  77                 rate++;
  78         }
  79
  80         return false;
  81 }
  82
  83 bool rtw_is_cckratesonly_included(u8 *rate)
  84 {
  85         while (*rate) {
  86                 u8 r = *rate & 0x7f;
  87
  88                 if (r != 2 && r != 4 && r != 11 && r != 22)
  89                         return false;
  90                 rate++;
  91         }
  92
  93         return true;
  94 }
  95
  96 int rtw_check_network_type(unsigned char *rate, int ratelen, int channel)
  97 {
  98         if (channel > 14) {
  99                 return WIRELESS_INVALID;
 100         } else { /*  could be pure B, pure G, or B/G */
 101                 if (rtw_is_cckratesonly_included(rate))
 102                         return WIRELESS_11B;
 103                 else if (rtw_is_cckrates_included(rate))
 104                         return  WIRELESS_11BG;
 105                 else
 106                         return WIRELESS_11G;
 107         }
 108 }
 109
 110 u8 *rtw_set_fixed_ie(unsigned char *pbuf, unsigned int len, unsigned char *source,
 111                                 unsigned int *frlen)
 112 {
 113         memcpy((void *)pbuf, (void *)source, len);
 114         *frlen = *frlen + len;
 115         return pbuf + len;
 116 }
 117
 118 /*  rtw_set_ie will update frame length */
 119 u8 *rtw_set_ie(u8 *pbuf,
 120                signed int index,
 121                uint len,
 122                u8 *source,
 123                uint *frlen) /* frame length */
 124 {
 125         *pbuf = (u8)index;
 126
 127         *(pbuf + 1) = (u8)len;
 128
 129         if (len > 0)
 130                 memcpy((void *)(pbuf + 2), (void *)source, len);
 131
 132         *frlen = *frlen + (len + 2);
 133
 134         return pbuf + len + 2;
 135 }
 136
 137 /*----------------------------------------------------------------------------
 138 index: the information element id index, limit is the limit for search
 139 -----------------------------------------------------------------------------*/
 140 u8 *rtw_get_ie(u8 *pbuf, signed int index, signed int *len, signed int limit)
 141 {
 142         signed int tmp, i;
 143         u8 *p;
 144
 145         if (limit < 1)
 146                 return NULL;
 147
 148         p = pbuf;
 149         i = 0;
 150         *len = 0;
 151         while (1) {
 152                 if (*p == index) {
 153                         *len = *(p + 1);
 154                         return p;
 155                 } else {
 156                         tmp = *(p + 1);
 157                         p += (tmp + 2);
 158                         i += (tmp + 2);
 159                 }
 160                 if (i >= limit)
 161                         break;
 162         }
 163         return NULL;
 164 }
 165
 166 /**
 167  * rtw_get_ie_ex - Search specific IE from a series of IEs
 168  * @in_ie: Address of IEs to search
 169  * @in_len: Length limit from in_ie
 170  * @eid: Element ID to match
 171  * @oui: OUI to match
 172  * @oui_len: OUI length
 173  * @ie: If not NULL and the specific IE is found, the IE will be copied to the buf starting from the specific IE
 174  * @ielen: If not NULL and the specific IE is found, will set to the length of the entire IE
 175  *
 176  * Returns: The address of the specific IE found, or NULL
 177  */
 178 u8 *rtw_get_ie_ex(u8 *in_ie, uint in_len, u8 eid, u8 *oui, u8 oui_len, u8 *ie, uint *ielen)
 179 {
 180         uint cnt;
 181         u8 *target_ie = NULL;
 182
 183         if (ielen)
 184                 *ielen = 0;
 185
 186         if (!in_ie || in_len <= 0)
 187                 return target_ie;
 188
 189         cnt = 0;
 190
 191         while (cnt < in_len) {
 192                 if (eid == in_ie[cnt]
 193                         && (!oui || !memcmp(&in_ie[cnt+2], oui, oui_len))) {
 194                         target_ie = &in_ie[cnt];
 195
 196                         if (ie)
 197                                 memcpy(ie, &in_ie[cnt], in_ie[cnt+1]+2);
 198
 199                         if (ielen)
 200                                 *ielen = in_ie[cnt+1]+2;
 201
 202                         break;
 203                 } else {
 204                         cnt += in_ie[cnt+1]+2; /* goto next */
 205                 }
 206         }
 207
 208         return target_ie;
 209 }
 210
 211 /**
 212  * rtw_ies_remove_ie - Find matching IEs and remove
 213  * @ies: Address of IEs to search
 214  * @ies_len: Pointer of length of ies, will update to new length
 215  * @offset: The offset to start search
 216  * @eid: Element ID to match
 217  * @oui: OUI to match
 218  * @oui_len: OUI length
 219  *
 220  * Returns: _SUCCESS: ies is updated, _FAIL: not updated
 221  */
 222 int rtw_ies_remove_ie(u8 *ies, uint *ies_len, uint offset, u8 eid, u8 *oui, u8 oui_len)
 223 {
 224         int ret = _FAIL;
 225         u8 *target_ie;
 226         u32 target_ielen;
 227         u8 *start;
 228         uint search_len;
 229
 230         if (!ies || !ies_len || *ies_len <= offset)
 231                 goto exit;
 232
 233         start = ies + offset;
 234         search_len = *ies_len - offset;
 235
 236         while (1) {
 237                 target_ie = rtw_get_ie_ex(start, search_len, eid, oui, oui_len, NULL, &target_ielen);
 238                 if (target_ie && target_ielen) {
 239                         u8 *remain_ies = target_ie + target_ielen;
 240                         uint remain_len = search_len - (remain_ies - start);
 241
 242                         memcpy(target_ie, remain_ies, remain_len);
 243                         *ies_len = *ies_len - target_ielen;
 244                         ret = _SUCCESS;
 245
 246                         start = target_ie;
 247                         search_len = remain_len;
 248                 } else {
 249                         break;
 250                 }
 251         }
 252 exit:
 253         return ret;
 254 }
 255
 256 void rtw_set_supported_rate(u8 *SupportedRates, uint mode)
 257 {
 258         memset(SupportedRates, 0, NDIS_802_11_LENGTH_RATES_EX);
 259
 260         switch (mode) {
 261         case WIRELESS_11B:
 262                 memcpy(SupportedRates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
 263                 break;
 264
 265         case WIRELESS_11G:
 266                 memcpy(SupportedRates, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN);
 267                 break;
 268
 269         case WIRELESS_11BG:
 270         case WIRELESS_11G_24N:
 271         case WIRELESS_11_24N:
 272         case WIRELESS_11BG_24N:
 273                 memcpy(SupportedRates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
 274                 memcpy(SupportedRates + IEEE80211_CCK_RATE_LEN, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN);
 275                 break;
 276         }
 277 }
 278
 279 uint rtw_get_rateset_len(u8 *rateset)
 280 {
 281         uint i;
 282
 283         for (i = 0; i < 13; i++)
 284                 if (rateset[i] == 0)
 285                         break;
 286         return i;
 287 }
 288
 289 int rtw_generate_ie(struct registry_priv *pregistrypriv)
 290 {
 291         u8 wireless_mode;
 292         int     sz = 0, rateLen;
 293         struct wlan_bssid_ex *pdev_network = &pregistrypriv->dev_network;
 294         u8 *ie = pdev_network->IEs;
 295
 296         /* timestamp will be inserted by hardware */
 297         sz += 8;
 298         ie += sz;
 299
 300         /* beacon interval : 2bytes */
 301         *(__le16 *)ie = cpu_to_le16((u16)pdev_network->Configuration.BeaconPeriod);/* BCN_INTERVAL; */
 302         sz += 2;
 303         ie += 2;
 304
 305         /* capability info */
 306         *(u16 *)ie = 0;
 307
 308         *(__le16 *)ie |= cpu_to_le16(WLAN_CAPABILITY_IBSS);
 309
 310         if (pregistrypriv->preamble == PREAMBLE_SHORT)
 311                 *(__le16 *)ie |= cpu_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE);
 312
 313         if (pdev_network->Privacy)
 314                 *(__le16 *)ie |= cpu_to_le16(WLAN_CAPABILITY_PRIVACY);
 315
 316         sz += 2;
 317         ie += 2;
 318
 319         /* SSID */
 320         ie = rtw_set_ie(ie, WLAN_EID_SSID, pdev_network->Ssid.SsidLength, pdev_network->Ssid.Ssid, &sz);
 321
 322         /* supported rates */
 323         wireless_mode = pregistrypriv->wireless_mode;
 324
 325         rtw_set_supported_rate(pdev_network->SupportedRates, wireless_mode);
 326
 327         rateLen = rtw_get_rateset_len(pdev_network->SupportedRates);
 328
 329         if (rateLen > 8) {
 330                 ie = rtw_set_ie(ie, WLAN_EID_SUPP_RATES, 8, pdev_network->SupportedRates, &sz);
 331                 /* ie = rtw_set_ie(ie, WLAN_EID_EXT_SUPP_RATES, (rateLen - 8), (pdev_network->SupportedRates + 8), &sz); */
 332         } else {
 333                 ie = rtw_set_ie(ie, WLAN_EID_SUPP_RATES, rateLen, pdev_network->SupportedRates, &sz);
 334         }
 335
 336         /* DS parameter set */
 337         ie = rtw_set_ie(ie, WLAN_EID_DS_PARAMS, 1, (u8 *)&(pdev_network->Configuration.DSConfig), &sz);
 338
 339         /* IBSS Parameter Set */
 340
 341         ie = rtw_set_ie(ie, WLAN_EID_IBSS_PARAMS, 2, (u8 *)&(pdev_network->Configuration.ATIMWindow), &sz);
 342
 343         if (rateLen > 8) {
 344                 ie = rtw_set_ie(ie, WLAN_EID_EXT_SUPP_RATES, (rateLen - 8), (pdev_network->SupportedRates + 8), &sz);
 345         }
 346
 347         /* HT Cap. */
 348         if ((pregistrypriv->wireless_mode & WIRELESS_11_24N) &&
 349             (pregistrypriv->ht_enable == true)) {
 350                 /* todo: */
 351         }
 352
 353         /* pdev_network->IELength =  sz; update IELength */
 354
 355         /* return _SUCCESS; */
 356
 357         return sz;
 358 }
 359
 360 unsigned char *rtw_get_wpa_ie(unsigned char *pie, int *wpa_ie_len, int limit)
 361 {
 362         int len;
 363         u16 val16;
 364         unsigned char wpa_oui_type[] = {0x00, 0x50, 0xf2, 0x01};
 365         u8 *pbuf = pie;
 366         int limit_new = limit;
 367         __le16 le_tmp;
 368
 369         while (1) {
 370                 pbuf = rtw_get_ie(pbuf, WLAN_EID_VENDOR_SPECIFIC, &len, limit_new);
 371
 372                 if (pbuf) {
 373                         /* check if oui matches... */
 374                         if (memcmp((pbuf + 2), wpa_oui_type, sizeof(wpa_oui_type))) {
 375                                 goto check_next_ie;
 376                         }
 377
 378                         /* check version... */
 379                         memcpy((u8 *)&le_tmp, (pbuf + 6), sizeof(val16));
 380
 381                         val16 = le16_to_cpu(le_tmp);
 382                         if (val16 != 0x0001)
 383                                 goto check_next_ie;
 384
 385                         *wpa_ie_len = *(pbuf + 1);
 386
 387                         return pbuf;
 388
 389                 } else {
 390                         *wpa_ie_len = 0;
 391                         return NULL;
 392                 }
 393
 394 check_next_ie:
 395
 396                 limit_new = limit - (pbuf - pie) - 2 - len;
 397
 398                 if (limit_new <= 0)
 399                         break;
 400
 401                 pbuf += (2 + len);
 402         }
 403
 404         *wpa_ie_len = 0;
 405
 406         return NULL;
 407 }
 408
 409 unsigned char *rtw_get_wpa2_ie(unsigned char *pie, int *rsn_ie_len, int limit)
 410 {
 411         return rtw_get_ie(pie, WLAN_EID_RSN, rsn_ie_len, limit);
 412 }
 413
 414 int rtw_get_wpa_cipher_suite(u8 *s)
 415 {
 416         if (!memcmp(s, WPA_CIPHER_SUITE_NONE, WPA_SELECTOR_LEN))
 417                 return WPA_CIPHER_NONE;
 418         if (!memcmp(s, WPA_CIPHER_SUITE_WEP40, WPA_SELECTOR_LEN))
 419                 return WPA_CIPHER_WEP40;
 420         if (!memcmp(s, WPA_CIPHER_SUITE_TKIP, WPA_SELECTOR_LEN))
 421                 return WPA_CIPHER_TKIP;
 422         if (!memcmp(s, WPA_CIPHER_SUITE_CCMP, WPA_SELECTOR_LEN))
 423                 return WPA_CIPHER_CCMP;
 424         if (!memcmp(s, WPA_CIPHER_SUITE_WEP104, WPA_SELECTOR_LEN))
 425                 return WPA_CIPHER_WEP104;
 426
 427         return 0;
 428 }
 429
 430 int rtw_get_wpa2_cipher_suite(u8 *s)
 431 {
 432         if (!memcmp(s, RSN_CIPHER_SUITE_NONE, RSN_SELECTOR_LEN))
 433                 return WPA_CIPHER_NONE;
 434         if (!memcmp(s, RSN_CIPHER_SUITE_WEP40, RSN_SELECTOR_LEN))
 435                 return WPA_CIPHER_WEP40;
 436         if (!memcmp(s, RSN_CIPHER_SUITE_TKIP, RSN_SELECTOR_LEN))
 437                 return WPA_CIPHER_TKIP;
 438         if (!memcmp(s, RSN_CIPHER_SUITE_CCMP, RSN_SELECTOR_LEN))
 439                 return WPA_CIPHER_CCMP;
 440         if (!memcmp(s, RSN_CIPHER_SUITE_WEP104, RSN_SELECTOR_LEN))
 441                 return WPA_CIPHER_WEP104;
 442
 443         return 0;
 444 }
 445
 446 int rtw_parse_wpa_ie(u8 *wpa_ie, int wpa_ie_len, int *group_cipher, int *pairwise_cipher, int *is_8021x)
 447 {
 448         int i, ret = _SUCCESS;
 449         int left, count;
 450         u8 *pos;
 451         u8 SUITE_1X[4] = {0x00, 0x50, 0xf2, 1};
 452
 453         if (wpa_ie_len <= 0) {
 454                 /* No WPA IE - fail silently */
 455                 return _FAIL;
 456         }
 457
 458         if ((*wpa_ie != WLAN_EID_VENDOR_SPECIFIC) || (*(wpa_ie+1) != (u8)(wpa_ie_len - 2)) ||
 459            (memcmp(wpa_ie+2, RTW_WPA_OUI_TYPE, WPA_SELECTOR_LEN))) {
 460                 return _FAIL;
 461         }
 462
 463         pos = wpa_ie;
 464
 465         pos += 8;
 466         left = wpa_ie_len - 8;
 467
 468         /* group_cipher */
 469         if (left >= WPA_SELECTOR_LEN) {
 470                 *group_cipher = rtw_get_wpa_cipher_suite(pos);
 471
 472                 pos += WPA_SELECTOR_LEN;
 473                 left -= WPA_SELECTOR_LEN;
 474
 475         } else if (left > 0)
 476                 return _FAIL;
 477
 478         /* pairwise_cipher */
 479         if (left >= 2) {
 480                 /* count = le16_to_cpu(*(u16*)pos); */
 481                 count = get_unaligned_le16(pos);
 482                 pos += 2;
 483                 left -= 2;
 484
 485                 if (count == 0 || left < count * WPA_SELECTOR_LEN)
 486                         return _FAIL;
 487
 488                 for (i = 0; i < count; i++) {
 489                         *pairwise_cipher |= rtw_get_wpa_cipher_suite(pos);
 490
 491                         pos += WPA_SELECTOR_LEN;
 492                         left -= WPA_SELECTOR_LEN;
 493                 }
 494
 495         } else if (left == 1)
 496                 return _FAIL;
 497
 498         if (is_8021x) {
 499                 if (left >= 6) {
 500                         pos += 2;
 501                         if (!memcmp(pos, SUITE_1X, 4)) {
 502                                 *is_8021x = 1;
 503                         }
 504                 }
 505         }
 506
 507         return ret;
 508 }
 509
 510 int rtw_parse_wpa2_ie(u8 *rsn_ie, int rsn_ie_len, int *group_cipher, int *pairwise_cipher, int *is_8021x)
 511 {
 512         int i, ret = _SUCCESS;
 513         int left, count;
 514         u8 *pos;
 515         u8 SUITE_1X[4] = {0x00, 0x0f, 0xac, 0x01};
 516
 517         if (rsn_ie_len <= 0) {
 518                 /* No RSN IE - fail silently */
 519                 return _FAIL;
 520         }
 521
 522         if ((*rsn_ie != WLAN_EID_RSN) || (*(rsn_ie+1) != (u8)(rsn_ie_len - 2))) {
 523                 return _FAIL;
 524         }
 525
 526         pos = rsn_ie;
 527         pos += 4;
 528         left = rsn_ie_len - 4;
 529
 530         /* group_cipher */
 531         if (left >= RSN_SELECTOR_LEN) {
 532                 *group_cipher = rtw_get_wpa2_cipher_suite(pos);
 533
 534                 pos += RSN_SELECTOR_LEN;
 535                 left -= RSN_SELECTOR_LEN;
 536
 537         } else if (left > 0)
 538                 return _FAIL;
 539
 540         /* pairwise_cipher */
 541         if (left >= 2) {
 542           /* count = le16_to_cpu(*(u16*)pos); */
 543                 count = get_unaligned_le16(pos);
 544                 pos += 2;
 545                 left -= 2;
 546
 547                 if (count == 0 || left < count * RSN_SELECTOR_LEN)
 548                         return _FAIL;
 549
 550                 for (i = 0; i < count; i++) {
 551                         *pairwise_cipher |= rtw_get_wpa2_cipher_suite(pos);
 552
 553                         pos += RSN_SELECTOR_LEN;
 554                         left -= RSN_SELECTOR_LEN;
 555                 }
 556
 557         } else if (left == 1)
 558                 return _FAIL;
 559
 560         if (is_8021x) {
 561                 if (left >= 6) {
 562                         pos += 2;
 563                         if (!memcmp(pos, SUITE_1X, 4))
 564                                 *is_8021x = 1;
 565                 }
 566         }
 567
 568         return ret;
 569 }
 570
 571 /* ifdef CONFIG_WAPI_SUPPORT */
 572 int rtw_get_wapi_ie(u8 *in_ie, uint in_len, u8 *wapi_ie, u16 *wapi_len)
 573 {
 574         int len = 0;
 575         u8 authmode;
 576         uint    cnt;
 577         u8 wapi_oui1[4] = {0x0, 0x14, 0x72, 0x01};
 578         u8 wapi_oui2[4] = {0x0, 0x14, 0x72, 0x02};
 579
 580         if (wapi_len)
 581                 *wapi_len = 0;
 582
 583         if (!in_ie || in_len <= 0)
 584                 return len;
 585
 586         cnt = (_TIMESTAMP_ + _BEACON_ITERVAL_ + _CAPABILITY_);
 587
 588         while (cnt < in_len) {
 589                 authmode = in_ie[cnt];
 590
 591                 /* if (authmode == WLAN_EID_BSS_AC_ACCESS_DELAY) */
 592                 if (authmode == WLAN_EID_BSS_AC_ACCESS_DELAY && (!memcmp(&in_ie[cnt+6], wapi_oui1, 4) ||
 593                                         !memcmp(&in_ie[cnt+6], wapi_oui2, 4))) {
 594                         if (wapi_ie)
 595                                 memcpy(wapi_ie, &in_ie[cnt], in_ie[cnt+1]+2);
 596
 597                         if (wapi_len)
 598                                 *wapi_len = in_ie[cnt+1]+2;
 599
 600                         cnt += in_ie[cnt+1]+2;  /* get next */
 601                 } else {
 602                         cnt += in_ie[cnt+1]+2;   /* get next */
 603                 }
 604         }
 605
 606         if (wapi_len)
 607                 len = *wapi_len;
 608
 609         return len;
 610 }
 611 /* endif */
 612
 613 void rtw_get_sec_ie(u8 *in_ie, uint in_len, u8 *rsn_ie, u16 *rsn_len, u8 *wpa_ie, u16 *wpa_len)
 614 {
 615         u8 authmode;
 616         u8 wpa_oui[4] = {0x0, 0x50, 0xf2, 0x01};
 617         uint    cnt;
 618
 619         /* Search required WPA or WPA2 IE and copy to sec_ie[ ] */
 620
 621         cnt = (_TIMESTAMP_ + _BEACON_ITERVAL_ + _CAPABILITY_);
 622
 623         while (cnt < in_len) {
 624                 authmode = in_ie[cnt];
 625
 626                 if ((authmode == WLAN_EID_VENDOR_SPECIFIC) && (!memcmp(&in_ie[cnt+2], &wpa_oui[0], 4))) {
 627                         if (wpa_ie)
 628                                 memcpy(wpa_ie, &in_ie[cnt], in_ie[cnt+1]+2);
 629
 630                         *wpa_len = in_ie[cnt + 1] + 2;
 631                         cnt += in_ie[cnt + 1] + 2;  /* get next */
 632                 } else {
 633                         if (authmode == WLAN_EID_RSN) {
 634                                 if (rsn_ie)
 635                                         memcpy(rsn_ie, &in_ie[cnt], in_ie[cnt + 1] + 2);
 636
 637                                 *rsn_len = in_ie[cnt+1]+2;
 638                                 cnt += in_ie[cnt+1]+2;  /* get next */
 639                         } else {
 640                                 cnt += in_ie[cnt+1]+2;   /* get next */
 641                         }
 642                 }
 643         }
 644 }
 645
 646 u8 rtw_is_wps_ie(u8 *ie_ptr, uint *wps_ielen)
 647 {
 648         u8 match = false;
 649         u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04};
 650
 651         if (!ie_ptr)
 652                 return match;
 653
 654         eid = ie_ptr[0];
 655
 656         if ((eid == WLAN_EID_VENDOR_SPECIFIC) && (!memcmp(&ie_ptr[2], wps_oui, 4))) {
 657                 *wps_ielen = ie_ptr[1]+2;
 658                 match = true;
 659         }
 660         return match;
 661 }
 662
 663 /**
 664  * rtw_get_wps_ie - Search WPS IE from a series of IEs
 665  * @in_ie: Address of IEs to search
 666  * @in_len: Length limit from in_ie
 667  * @wps_ie: If not NULL and WPS IE is found, WPS IE will be copied to the buf starting from wps_ie
 668  * @wps_ielen: If not NULL and WPS IE is found, will set to the length of the entire WPS IE
 669  *
 670  * Returns: The address of the WPS IE found, or NULL
 671  */
 672 u8 *rtw_get_wps_ie(u8 *in_ie, uint in_len, u8 *wps_ie, uint *wps_ielen)
 673 {
 674         uint cnt;
 675         u8 *wpsie_ptr = NULL;
 676         u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04};
 677
 678         if (wps_ielen)
 679                 *wps_ielen = 0;
 680
 681         if (!in_ie || in_len <= 0)
 682                 return wpsie_ptr;
 683
 684         cnt = 0;
 685
 686         while (cnt < in_len) {
 687                 eid = in_ie[cnt];
 688
 689                 if ((eid == WLAN_EID_VENDOR_SPECIFIC) && (!memcmp(&in_ie[cnt+2], wps_oui, 4))) {
 690                         wpsie_ptr = &in_ie[cnt];
 691
 692                         if (wps_ie)
 693                                 memcpy(wps_ie, &in_ie[cnt], in_ie[cnt+1]+2);
 694
 695                         if (wps_ielen)
 696                                 *wps_ielen = in_ie[cnt+1]+2;
 697
 698                         cnt += in_ie[cnt+1]+2;
 699
 700                         break;
 701                 } else {
 702                         cnt += in_ie[cnt+1]+2; /* goto next */
 703                 }
 704         }
 705
 706         return wpsie_ptr;
 707 }
 708
 709 /**
 710  * rtw_get_wps_attr - Search a specific WPS attribute from a given WPS IE
 711  * @wps_ie: Address of WPS IE to search
 712  * @wps_ielen: Length limit from wps_ie
 713  * @target_attr_id: The attribute ID of WPS attribute to search
 714  * @buf_attr: If not NULL and the WPS attribute is found, WPS attribute will be copied to the buf starting from buf_attr
 715  * @len_attr: If not NULL and the WPS attribute is found, will set to the length of the entire WPS attribute
 716  *
 717  * Returns: the address of the specific WPS attribute found, or NULL
 718  */
 719 u8 *rtw_get_wps_attr(u8 *wps_ie, uint wps_ielen, u16 target_attr_id, u8 *buf_attr, u32 *len_attr)
 720 {
 721         u8 *attr_ptr = NULL;
 722         u8 *target_attr_ptr = NULL;
 723         u8 wps_oui[4] = {0x00, 0x50, 0xF2, 0x04};
 724
 725         if (len_attr)
 726                 *len_attr = 0;
 727
 728         if ((wps_ie[0] != WLAN_EID_VENDOR_SPECIFIC) ||
 729                 (memcmp(wps_ie + 2, wps_oui, 4))) {
 730                 return attr_ptr;
 731         }
 732
 733         /*  6 = 1(Element ID) + 1(Length) + 4(WPS OUI) */
 734         attr_ptr = wps_ie + 6; /* goto first attr */
 735
 736         while (attr_ptr - wps_ie < wps_ielen) {
 737                 /*  4 = 2(Attribute ID) + 2(Length) */
 738                 u16 attr_id = get_unaligned_be16(attr_ptr);
 739                 u16 attr_data_len = get_unaligned_be16(attr_ptr + 2);
 740                 u16 attr_len = attr_data_len + 4;
 741
 742                 if (attr_id == target_attr_id) {
 743                         target_attr_ptr = attr_ptr;
 744
 745                         if (buf_attr)
 746                                 memcpy(buf_attr, attr_ptr, attr_len);
 747
 748                         if (len_attr)
 749                                 *len_attr = attr_len;
 750
 751                         break;
 752                 } else {
 753                         attr_ptr += attr_len; /* goto next */
 754                 }
 755         }
 756
 757         return target_attr_ptr;
 758 }
 759
 760 /**
 761  * rtw_get_wps_attr_content - Search a specific WPS attribute content from a given WPS IE
 762  * @wps_ie: Address of WPS IE to search
 763  * @wps_ielen: Length limit from wps_ie
 764  * @target_attr_id: The attribute ID of WPS attribute to search
 765  * @buf_content: If not NULL and the WPS attribute is found, WPS attribute content will be copied to the buf starting from buf_content
 766  * @len_content: If not NULL and the WPS attribute is found, will set to the length of the WPS attribute content
 767  *
 768  * Returns: the address of the specific WPS attribute content found, or NULL
 769  */
 770 u8 *rtw_get_wps_attr_content(u8 *wps_ie, uint wps_ielen, u16 target_attr_id, u8 *buf_content, uint *len_content)
 771 {
 772         u8 *attr_ptr;
 773         u32 attr_len;
 774
 775         if (len_content)
 776                 *len_content = 0;
 777
 778         attr_ptr = rtw_get_wps_attr(wps_ie, wps_ielen, target_attr_id, NULL, &attr_len);
 779
 780         if (attr_ptr && attr_len) {
 781                 if (buf_content)
 782                         memcpy(buf_content, attr_ptr+4, attr_len-4);
 783
 784                 if (len_content)
 785                         *len_content = attr_len-4;
 786
 787                 return attr_ptr+4;
 788         }
 789
 790         return NULL;
 791 }
 792
 793 static int rtw_ieee802_11_parse_vendor_specific(u8 *pos, uint elen,
 794                                             struct rtw_ieee802_11_elems *elems,
 795                                             int show_errors)
 796 {
 797         unsigned int oui;
 798
 799         /* first 3 bytes in vendor specific information element are the IEEE
 800          * OUI of the vendor. The following byte is used a vendor specific
 801          * sub-type. */
 802         if (elen < 4)
 803                 return -1;
 804
 805         oui = get_unaligned_be24(pos);
 806         switch (oui) {
 807         case OUI_MICROSOFT:
 808                 /* Microsoft/Wi-Fi information elements are further typed and
 809                  * subtyped */
 810                 switch (pos[3]) {
 811                 case 1:
 812                         /* Microsoft OUI (00:50:F2) with OUI Type 1:
 813                          * real WPA information element */
 814                         elems->wpa_ie = pos;
 815                         elems->wpa_ie_len = elen;
 816                         break;
 817                 case WME_OUI_TYPE: /* this is a Wi-Fi WME info. element */
 818                         if (elen < 5)
 819                                 return -1;
 820
 821                         switch (pos[4]) {
 822                         case WME_OUI_SUBTYPE_INFORMATION_ELEMENT:
 823                         case WME_OUI_SUBTYPE_PARAMETER_ELEMENT:
 824                                 elems->wme = pos;
 825                                 elems->wme_len = elen;
 826                                 break;
 827                         case WME_OUI_SUBTYPE_TSPEC_ELEMENT:
 828                                 elems->wme_tspec = pos;
 829                                 elems->wme_tspec_len = elen;
 830                                 break;
 831                         default:
 832                                 return -1;
 833                         }
 834                         break;
 835                 case 4:
 836                         /* Wi-Fi Protected Setup (WPS) IE */
 837                         elems->wps_ie = pos;
 838                         elems->wps_ie_len = elen;
 839                         break;
 840                 default:
 841                         return -1;
 842                 }
 843                 break;
 844
 845         case OUI_BROADCOM:
 846                 switch (pos[3]) {
 847                 case VENDOR_HT_CAPAB_OUI_TYPE:
 848                         elems->vendor_ht_cap = pos;
 849                         elems->vendor_ht_cap_len = elen;
 850                         break;
 851                 default:
 852                         return -1;
 853                 }
 854                 break;
 855
 856         default:
 857                 return -1;
 858         }
 859
 860         return 0;
 861 }
 862
 863 /**
 864  * rtw_ieee802_11_parse_elems - Parse information elements in management frames
 865  * @start: Pointer to the start of IEs
 866  * @len: Length of IE buffer in octets
 867  * @elems: Data structure for parsed elements
 868  * @show_errors: Whether to show parsing errors in debug log
 869  * Returns: Parsing result
 870  */
 871 enum ParseRes rtw_ieee802_11_parse_elems(u8 *start, uint len,
 872                                 struct rtw_ieee802_11_elems *elems,
 873                                 int show_errors)
 874 {
 875         uint left = len;
 876         u8 *pos = start;
 877         int unknown = 0;
 878
 879         memset(elems, 0, sizeof(*elems));
 880
 881         while (left >= 2) {
 882                 u8 id, elen;
 883
 884                 id = *pos++;
 885                 elen = *pos++;
 886                 left -= 2;
 887
 888                 if (elen > left)
 889                         return ParseFailed;
 890
 891                 switch (id) {
 892                 case WLAN_EID_SSID:
 893                         elems->ssid = pos;
 894                         elems->ssid_len = elen;
 895                         break;
 896                 case WLAN_EID_SUPP_RATES:
 897                         elems->supp_rates = pos;
 898                         elems->supp_rates_len = elen;
 899                         break;
 900                 case WLAN_EID_FH_PARAMS:
 901                         elems->fh_params = pos;
 902                         elems->fh_params_len = elen;
 903                         break;
 904                 case WLAN_EID_DS_PARAMS:
 905                         elems->ds_params = pos;
 906                         elems->ds_params_len = elen;
 907                         break;
 908                 case WLAN_EID_CF_PARAMS:
 909                         elems->cf_params = pos;
 910                         elems->cf_params_len = elen;
 911                         break;
 912                 case WLAN_EID_TIM:
 913                         elems->tim = pos;
 914                         elems->tim_len = elen;
 915                         break;
 916                 case WLAN_EID_IBSS_PARAMS:
 917                         elems->ibss_params = pos;
 918                         elems->ibss_params_len = elen;
 919                         break;
 920                 case WLAN_EID_CHALLENGE:
 921                         elems->challenge = pos;
 922                         elems->challenge_len = elen;
 923                         break;
 924                 case WLAN_EID_ERP_INFO:
 925                         elems->erp_info = pos;
 926                         elems->erp_info_len = elen;
 927                         break;
 928                 case WLAN_EID_EXT_SUPP_RATES:
 929                         elems->ext_supp_rates = pos;
 930                         elems->ext_supp_rates_len = elen;
 931                         break;
 932                 case WLAN_EID_VENDOR_SPECIFIC:
 933                         if (rtw_ieee802_11_parse_vendor_specific(pos, elen,
 934                                                              elems,
 935                                                              show_errors))
 936                                 unknown++;
 937                         break;
 938                 case WLAN_EID_RSN:
 939                         elems->rsn_ie = pos;
 940                         elems->rsn_ie_len = elen;
 941                         break;
 942                 case WLAN_EID_PWR_CAPABILITY:
 943                         elems->power_cap = pos;
 944                         elems->power_cap_len = elen;
 945                         break;
 946                 case WLAN_EID_SUPPORTED_CHANNELS:
 947                         elems->supp_channels = pos;
 948                         elems->supp_channels_len = elen;
 949                         break;
 950                 case WLAN_EID_MOBILITY_DOMAIN:
 951                         elems->mdie = pos;
 952                         elems->mdie_len = elen;
 953                         break;
 954                 case WLAN_EID_FAST_BSS_TRANSITION:
 955                         elems->ftie = pos;
 956                         elems->ftie_len = elen;
 957                         break;
 958                 case WLAN_EID_TIMEOUT_INTERVAL:
 959                         elems->timeout_int = pos;
 960                         elems->timeout_int_len = elen;
 961                         break;
 962                 case WLAN_EID_HT_CAPABILITY:
 963                         elems->ht_capabilities = pos;
 964                         elems->ht_capabilities_len = elen;
 965                         break;
 966                 case WLAN_EID_HT_OPERATION:
 967                         elems->ht_operation = pos;
 968                         elems->ht_operation_len = elen;
 969                         break;
 970                 case WLAN_EID_VHT_CAPABILITY:
 971                         elems->vht_capabilities = pos;
 972                         elems->vht_capabilities_len = elen;
 973                         break;
 974                 case WLAN_EID_VHT_OPERATION:
 975                         elems->vht_operation = pos;
 976                         elems->vht_operation_len = elen;
 977                         break;
 978                 case WLAN_EID_OPMODE_NOTIF:
 979                         elems->vht_op_mode_notify = pos;
 980                         elems->vht_op_mode_notify_len = elen;
 981                         break;
 982                 default:
 983                         unknown++;
 984                         break;
 985                 }
 986
 987                 left -= elen;
 988                 pos += elen;
 989         }
 990
 991         if (left)
 992                 return ParseFailed;
 993
 994         return unknown ? ParseUnknown : ParseOK;
 995 }
 996
 997 void rtw_macaddr_cfg(struct device *dev, u8 *mac_addr)
 998 {
 999         u8 mac[ETH_ALEN];
1000         struct device_node *np = dev->of_node;
1001         const unsigned char *addr;
1002         int len;
1003
1004         if (!mac_addr)
1005                 return;
1006
1007         if (rtw_initmac && mac_pton(rtw_initmac, mac)) {
1008                 /* Users specify the mac address */
1009                 ether_addr_copy(mac_addr, mac);
1010         } else {
1011                 /* Use the mac address stored in the Efuse */
1012                 ether_addr_copy(mac, mac_addr);
1013         }
1014
1015         if (is_broadcast_ether_addr(mac) || is_zero_ether_addr(mac)) {
1016                 addr = of_get_property(np, "local-mac-address", &len);
1017
1018                 if (addr && len == ETH_ALEN) {
1019                         ether_addr_copy(mac_addr, addr);
1020                 } else {
1021                         eth_random_addr(mac_addr);
1022                 }
1023         }
1024 }
1025
1026 static int rtw_get_cipher_info(struct wlan_network *pnetwork)
1027 {
1028         u32 wpa_ielen;
1029         unsigned char *pbuf;
1030         int group_cipher = 0, pairwise_cipher = 0, is8021x = 0;
1031         int ret = _FAIL;
1032
1033         pbuf = rtw_get_wpa_ie(&pnetwork->network.IEs[12], &wpa_ielen, pnetwork->network.IELength-12);
1034
1035         if (pbuf && (wpa_ielen > 0)) {
1036                 if (_SUCCESS == rtw_parse_wpa_ie(pbuf, wpa_ielen+2, &group_cipher, &pairwise_cipher, &is8021x)) {
1037                         pnetwork->BcnInfo.pairwise_cipher = pairwise_cipher;
1038                         pnetwork->BcnInfo.group_cipher = group_cipher;
1039                         pnetwork->BcnInfo.is_8021x = is8021x;
1040                         ret = _SUCCESS;
1041                 }
1042         } else {
1043                 pbuf = rtw_get_wpa2_ie(&pnetwork->network.IEs[12], &wpa_ielen, pnetwork->network.IELength-12);
1044
1045                 if (pbuf && (wpa_ielen > 0)) {
1046                         if (_SUCCESS == rtw_parse_wpa2_ie(pbuf, wpa_ielen+2, &group_cipher, &pairwise_cipher, &is8021x)) {
1047                                 pnetwork->BcnInfo.pairwise_cipher = pairwise_cipher;
1048                                 pnetwork->BcnInfo.group_cipher = group_cipher;
1049                                 pnetwork->BcnInfo.is_8021x = is8021x;
1050                                 ret = _SUCCESS;
1051                         }
1052                 }
1053         }
1054
1055         return ret;
1056 }
1057
1058 void rtw_get_bcn_info(struct wlan_network *pnetwork)
1059 {
1060         unsigned short cap = 0;
1061         u8 bencrypt = 0;
1062         /* u8 wpa_ie[255], rsn_ie[255]; */
1063         u16 wpa_len = 0, rsn_len = 0;
1064         struct HT_info_element *pht_info = NULL;
1065         struct ieee80211_ht_cap *pht_cap = NULL;
1066         unsigned int            len;
1067         unsigned char   *p;
1068         __le16 le_cap;
1069
1070         memcpy((u8 *)&le_cap, rtw_get_capability_from_ie(pnetwork->network.IEs), 2);
1071         cap = le16_to_cpu(le_cap);
1072         if (cap & WLAN_CAPABILITY_PRIVACY) {
1073                 bencrypt = 1;
1074                 pnetwork->network.Privacy = 1;
1075         } else {
1076                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_OPENSYS;
1077         }
1078         rtw_get_sec_ie(pnetwork->network.IEs, pnetwork->network.IELength, NULL, &rsn_len, NULL, &wpa_len);
1079
1080         if (rsn_len > 0) {
1081                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA2;
1082         } else if (wpa_len > 0) {
1083                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA;
1084         } else {
1085                 if (bencrypt)
1086                         pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WEP;
1087         }
1088         rtw_get_cipher_info(pnetwork);
1089
1090         /* get bwmode and ch_offset */
1091         /* parsing HT_CAP_IE */
1092         p = rtw_get_ie(pnetwork->network.IEs + _FIXED_IE_LENGTH_, WLAN_EID_HT_CAPABILITY, &len, pnetwork->network.IELength - _FIXED_IE_LENGTH_);
1093         if (p && len > 0) {
1094                         pht_cap = (struct ieee80211_ht_cap *)(p + 2);
1095                         pnetwork->BcnInfo.ht_cap_info = le16_to_cpu(pht_cap->cap_info);
1096         } else {
1097                         pnetwork->BcnInfo.ht_cap_info = 0;
1098         }
1099         /* parsing HT_INFO_IE */
1100         p = rtw_get_ie(pnetwork->network.IEs + _FIXED_IE_LENGTH_, WLAN_EID_HT_OPERATION, &len, pnetwork->network.IELength - _FIXED_IE_LENGTH_);
1101         if (p && len > 0) {
1102                         pht_info = (struct HT_info_element *)(p + 2);
1103                         pnetwork->BcnInfo.ht_info_infos_0 = pht_info->infos[0];
1104         } else {
1105                         pnetwork->BcnInfo.ht_info_infos_0 = 0;
1106         }
1107 }
1108
1109 /* show MCS rate, unit: 100Kbps */
1110 u16 rtw_mcs_rate(u8 rf_type, u8 bw_40MHz, u8 short_GI, unsigned char *MCS_rate)
1111 {
1112         u16 max_rate = 0;
1113
1114         if (rf_type == RF_1T1R) {
1115                 if (MCS_rate[0] & BIT(7))
1116                         max_rate = (bw_40MHz) ? ((short_GI)?1500:1350):((short_GI)?722:650);
1117                 else if (MCS_rate[0] & BIT(6))
1118                         max_rate = (bw_40MHz) ? ((short_GI)?1350:1215):((short_GI)?650:585);
1119                 else if (MCS_rate[0] & BIT(5))
1120                         max_rate = (bw_40MHz) ? ((short_GI)?1200:1080):((short_GI)?578:520);
1121                 else if (MCS_rate[0] & BIT(4))
1122                         max_rate = (bw_40MHz) ? ((short_GI)?900:810):((short_GI)?433:390);
1123                 else if (MCS_rate[0] & BIT(3))
1124                         max_rate = (bw_40MHz) ? ((short_GI)?600:540):((short_GI)?289:260);
1125                 else if (MCS_rate[0] & BIT(2))
1126                         max_rate = (bw_40MHz) ? ((short_GI)?450:405):((short_GI)?217:195);
1127                 else if (MCS_rate[0] & BIT(1))
1128                         max_rate = (bw_40MHz) ? ((short_GI)?300:270):((short_GI)?144:130);
1129                 else if (MCS_rate[0] & BIT(0))
1130                         max_rate = (bw_40MHz) ? ((short_GI)?150:135):((short_GI)?72:65);
1131         } else {
1132                 if (MCS_rate[1]) {
1133                         if (MCS_rate[1] & BIT(7))
1134                                 max_rate = (bw_40MHz) ? ((short_GI)?3000:2700):((short_GI)?1444:1300);
1135                         else if (MCS_rate[1] & BIT(6))
1136                                 max_rate = (bw_40MHz) ? ((short_GI)?2700:2430):((short_GI)?1300:1170);
1137                         else if (MCS_rate[1] & BIT(5))
1138                                 max_rate = (bw_40MHz) ? ((short_GI)?2400:2160):((short_GI)?1156:1040);
1139                         else if (MCS_rate[1] & BIT(4))
1140                                 max_rate = (bw_40MHz) ? ((short_GI)?1800:1620):((short_GI)?867:780);
1141                         else if (MCS_rate[1] & BIT(3))
1142                                 max_rate = (bw_40MHz) ? ((short_GI)?1200:1080):((short_GI)?578:520);
1143                         else if (MCS_rate[1] & BIT(2))
1144                                 max_rate = (bw_40MHz) ? ((short_GI)?900:810):((short_GI)?433:390);
1145                         else if (MCS_rate[1] & BIT(1))
1146                                 max_rate = (bw_40MHz) ? ((short_GI)?600:540):((short_GI)?289:260);
1147                         else if (MCS_rate[1] & BIT(0))
1148                                 max_rate = (bw_40MHz) ? ((short_GI)?300:270):((short_GI)?144:130);
1149                 } else {
1150                         if (MCS_rate[0] & BIT(7))
1151                                 max_rate = (bw_40MHz) ? ((short_GI)?1500:1350):((short_GI)?722:650);
1152                         else if (MCS_rate[0] & BIT(6))
1153                                 max_rate = (bw_40MHz) ? ((short_GI)?1350:1215):((short_GI)?650:585);
1154                         else if (MCS_rate[0] & BIT(5))
1155                                 max_rate = (bw_40MHz) ? ((short_GI)?1200:1080):((short_GI)?578:520);
1156                         else if (MCS_rate[0] & BIT(4))
1157                                 max_rate = (bw_40MHz) ? ((short_GI)?900:810):((short_GI)?433:390);
1158                         else if (MCS_rate[0] & BIT(3))
1159                                 max_rate = (bw_40MHz) ? ((short_GI)?600:540):((short_GI)?289:260);
1160                         else if (MCS_rate[0] & BIT(2))
1161                                 max_rate = (bw_40MHz) ? ((short_GI)?450:405):((short_GI)?217:195);
1162                         else if (MCS_rate[0] & BIT(1))
1163                                 max_rate = (bw_40MHz) ? ((short_GI)?300:270):((short_GI)?144:130);
1164                         else if (MCS_rate[0] & BIT(0))
1165                                 max_rate = (bw_40MHz) ? ((short_GI)?150:135):((short_GI)?72:65);
1166                 }
1167         }
1168         return max_rate;
1169 }
1170
1171 int rtw_action_frame_parse(const u8 *frame, u32 frame_len, u8 *category, u8 *action)
1172 {
1173         const u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr);
1174         u16 fc;
1175         u8 c;
1176         u8 a = ACT_PUBLIC_MAX;
1177
1178         fc = le16_to_cpu(((struct ieee80211_hdr_3addr *)frame)->frame_control);
1179
1180         if ((fc & (IEEE80211_FCTL_FTYPE|IEEE80211_FCTL_STYPE))
1181                 != (IEEE80211_FTYPE_MGMT|IEEE80211_STYPE_ACTION)
1182         ) {
1183                 return false;
1184         }
1185
1186         c = frame_body[0];
1187
1188         switch (c) {
1189         case RTW_WLAN_CATEGORY_P2P: /* vendor-specific */
1190                 break;
1191         default:
1192                 a = frame_body[1];
1193         }
1194
1195         if (category)
1196                 *category = c;
1197         if (action)
1198                 *action = a;
1199
1200         return true;
1201 }
1202
1203 static const char *_action_public_str[] = {
1204         "ACT_PUB_BSSCOEXIST",
1205         "ACT_PUB_DSE_ENABLE",
1206         "ACT_PUB_DSE_DEENABLE",
1207         "ACT_PUB_DSE_REG_LOCATION",
1208         "ACT_PUB_EXT_CHL_SWITCH",
1209         "ACT_PUB_DSE_MSR_REQ",
1210         "ACT_PUB_DSE_MSR_RPRT",
1211         "ACT_PUB_MP",
1212         "ACT_PUB_DSE_PWR_CONSTRAINT",
1213         "ACT_PUB_VENDOR",
1214         "ACT_PUB_GAS_INITIAL_REQ",
1215         "ACT_PUB_GAS_INITIAL_RSP",
1216         "ACT_PUB_GAS_COMEBACK_REQ",
1217         "ACT_PUB_GAS_COMEBACK_RSP",
1218         "ACT_PUB_TDLS_DISCOVERY_RSP",
1219         "ACT_PUB_LOCATION_TRACK",
1220         "ACT_PUB_RSVD",
1221 };
1222
1223 const char *action_public_str(u8 action)
1224 {
1225         action = (action >= ACT_PUBLIC_MAX) ? ACT_PUBLIC_MAX : action;
1226         return _action_public_str[action];
1227 }