drivers/staging/rtl8723au/core/rtw_ieee80211.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  ******************************************************************************/
  15 #define _IEEE80211_C
  16
  17 #include <drv_types.h>
  18 #include <linux/ieee80211.h>
  19 #include <ieee80211.h>
  20 #include <wifi.h>
  21 #include <osdep_service.h>
  22 #include <wlan_bssdef.h>
  23
  24 u8 RTW_WPA_OUI23A_TYPE[] = { 0x00, 0x50, 0xf2, 1 };
  25 u16 RTW_WPA_VERSION23A = 1;
  26 u8 WPA_AUTH_KEY_MGMT_NONE23A[] = { 0x00, 0x50, 0xf2, 0 };
  27 u8 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X23A[] = { 0x00, 0x50, 0xf2, 1 };
  28 u8 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X23A[] = { 0x00, 0x50, 0xf2, 2 };
  29 u8 WPA_CIPHER_SUITE_NONE23A[] = { 0x00, 0x50, 0xf2, 0 };
  30 u8 WPA_CIPHER_SUITE_WEP4023A[] = { 0x00, 0x50, 0xf2, 1 };
  31 u8 WPA_CIPHER_SUITE_TKIP23A[] = { 0x00, 0x50, 0xf2, 2 };
  32 u8 WPA_CIPHER_SUITE_WRAP23A[] = { 0x00, 0x50, 0xf2, 3 };
  33 u8 WPA_CIPHER_SUITE_CCMP23A[] = { 0x00, 0x50, 0xf2, 4 };
  34 u8 WPA_CIPHER_SUITE_WEP10423A[] = { 0x00, 0x50, 0xf2, 5 };
  35
  36 u8 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X23A[] = { 0x00, 0x0f, 0xac, 1 };
  37 u8 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X23A[] = { 0x00, 0x0f, 0xac, 2 };
  38 u8 RSN_CIPHER_SUITE_NONE23A[] = { 0x00, 0x0f, 0xac, 0 };
  39 u8 RSN_CIPHER_SUITE_WEP4023A[] = { 0x00, 0x0f, 0xac, 1 };
  40 u8 RSN_CIPHER_SUITE_TKIP23A[] = { 0x00, 0x0f, 0xac, 2 };
  41 u8 RSN_CIPHER_SUITE_WRAP23A[] = { 0x00, 0x0f, 0xac, 3 };
  42 u8 RSN_CIPHER_SUITE_CCMP23A[] = { 0x00, 0x0f, 0xac, 4 };
  43 u8 RSN_CIPHER_SUITE_WEP10423A[] = { 0x00, 0x0f, 0xac, 5 };
  44 /*  */
  45 /*  for adhoc-master to generate ie and provide supported-rate to fw */
  46 /*  */
  47
  48 static u8 WIFI_CCKRATES[] = {
  49         IEEE80211_CCK_RATE_1MB | IEEE80211_BASIC_RATE_MASK,
  50         IEEE80211_CCK_RATE_2MB | IEEE80211_BASIC_RATE_MASK,
  51         IEEE80211_CCK_RATE_5MB | IEEE80211_BASIC_RATE_MASK,
  52         IEEE80211_CCK_RATE_11MB | IEEE80211_BASIC_RATE_MASK
  53 };
  54
  55 static u8 WIFI_OFDMRATES[] = {
  56         IEEE80211_OFDM_RATE_6MB,
  57         IEEE80211_OFDM_RATE_9MB,
  58         IEEE80211_OFDM_RATE_12MB,
  59         IEEE80211_OFDM_RATE_18MB,
  60         IEEE80211_OFDM_RATE_24MB,
  61         IEEE80211_OFDM_RATE_36MB,
  62         IEEE80211_OFDM_RATE_48MB,
  63         IEEE80211_OFDM_RATE_54MB
  64 };
  65
  66 int rtw_get_bit_value_from_ieee_value23a(u8 val)
  67 {
  68         unsigned char dot11_rate_table[]=
  69                 {2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108, 0};
  70
  71         int i = 0;
  72
  73         while (dot11_rate_table[i] != 0) {
  74                 if (dot11_rate_table[i] == val)
  75                         return BIT(i);
  76                 i++;
  77         }
  78         return 0;
  79 }
  80
  81 static bool rtw_is_cckrates_included(u8 *rate)
  82 {
  83         u32 i = 0;
  84
  85         while (rate[i]) {
  86                 if ((rate[i] & 0x7f) == 2 || (rate[i] & 0x7f) == 4 ||
  87                     (rate[i] & 0x7f) == 11 || (rate[i] & 0x7f) == 22)
  88                         return true;
  89                 i++;
  90         }
  91
  92         return false;
  93 }
  94
  95 static bool rtw_is_cckratesonly_included(u8 *rate)
  96 {
  97         u32 i = 0;
  98
  99         while (rate[i]) {
 100                 if ((rate[i] & 0x7f) != 2 && (rate[i] & 0x7f) != 4 &&
 101                     (rate[i] & 0x7f) != 11 && (rate[i] & 0x7f) != 22)
 102                         return false;
 103
 104                 i++;
 105         }
 106
 107         return true;
 108 }
 109
 110 int rtw_check_network_type23a(unsigned char *rate, int ratelen, int channel)
 111 {
 112         if (channel > 14) {
 113                 if (rtw_is_cckrates_included(rate))
 114                         return WIRELESS_INVALID;
 115                 else
 116                         return WIRELESS_11A;
 117         } else {  /*  could be pure B, pure G, or B/G */
 118                 if (rtw_is_cckratesonly_included(rate))
 119                         return WIRELESS_11B;
 120                 else if (rtw_is_cckrates_included(rate))
 121                         return  WIRELESS_11BG;
 122                 else
 123                         return WIRELESS_11G;
 124         }
 125 }
 126
 127 /*  rtw_set_ie23a will update frame length */
 128 u8 *rtw_set_ie23a(u8 *pbuf, int index, uint len, const u8 *source, uint *frlen)
 129 {
 130
 131         *pbuf = (u8)index;
 132
 133         *(pbuf + 1) = (u8)len;
 134
 135         if (len > 0)
 136                 memcpy((void *)(pbuf + 2), (void *)source, len);
 137
 138         *frlen = *frlen + (len + 2);
 139
 140         return pbuf + len + 2;
 141 }
 142
 143 inline u8 *rtw_set_ie23a_ch_switch (u8 *buf, u32 *buf_len, u8 ch_switch_mode,
 144                                 u8 new_ch, u8 ch_switch_cnt)
 145 {
 146         u8 ie_data[3];
 147
 148         ie_data[0] = ch_switch_mode;
 149         ie_data[1] = new_ch;
 150         ie_data[2] = ch_switch_cnt;
 151         return rtw_set_ie23a(buf, WLAN_EID_CHANNEL_SWITCH,  3, ie_data, buf_len);
 152 }
 153
 154 inline u8 hal_ch_offset_to_secondary_ch_offset23a(u8 ch_offset)
 155 {
 156         if (ch_offset == HAL_PRIME_CHNL_OFFSET_LOWER)
 157                 return IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 158         else if (ch_offset == HAL_PRIME_CHNL_OFFSET_UPPER)
 159                 return IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 160
 161         return IEEE80211_HT_PARAM_CHA_SEC_NONE;
 162 }
 163
 164 inline u8 *rtw_set_ie23a_secondary_ch_offset(u8 *buf, u32 *buf_len,
 165                                           u8 secondary_ch_offset)
 166 {
 167         return rtw_set_ie23a(buf, WLAN_EID_SECONDARY_CHANNEL_OFFSET,
 168                           1, &secondary_ch_offset, buf_len);
 169 }
 170
 171 /*----------------------------------------------------------------------------
 172 index: the information element id index, limit is the limit for search
 173 -----------------------------------------------------------------------------*/
 174 u8 *rtw_get_ie23a(u8 *pbuf, int index, int *len, int limit)
 175 {
 176         int tmp, i;
 177         u8 *p;
 178
 179         if (limit < 1) {
 180
 181                 return NULL;
 182         }
 183
 184         p = pbuf;
 185         i = 0;
 186         *len = 0;
 187         while (1) {
 188                 if (*p == index) {
 189                         *len = *(p + 1);
 190                         return p;
 191                 } else {
 192                         tmp = *(p + 1);
 193                         p += (tmp + 2);
 194                         i += (tmp + 2);
 195                 }
 196                 if (i >= limit)
 197                         break;
 198         }
 199
 200         return NULL;
 201 }
 202
 203 /**
 204  * rtw_get_ie23a_ex - Search specific IE from a series of IEs
 205  * @in_ie: Address of IEs to search
 206  * @in_len: Length limit from in_ie
 207  * @eid: Element ID to match
 208  * @oui: OUI to match
 209  * @oui_len: OUI length
 210  * @ie: If not NULL and the specific IE is found, the IE will be copied
 211  *      to the buf starting from the specific IE
 212  * @ielen: If not NULL and the specific IE is found, will set to the length
 213  *         of the entire IE
 214  *
 215  * Returns: The address of the specific IE found, or NULL
 216  */
 217 u8 *rtw_get_ie23a_ex(u8 *in_ie, uint in_len, u8 eid, u8 *oui, u8 oui_len,
 218                   u8 *ie, uint *ielen)
 219 {
 220         uint cnt;
 221         u8 *target_ie = NULL;
 222
 223         if (ielen)
 224                 *ielen = 0;
 225
 226         if (!in_ie || in_len <= 0)
 227                 return target_ie;
 228
 229         cnt = 0;
 230
 231         while (cnt < in_len) {
 232                 if (eid == in_ie[cnt] &&
 233                     (!oui || !memcmp(&in_ie[cnt+2], oui, oui_len))) {
 234                         target_ie = &in_ie[cnt];
 235
 236                         if (ie)
 237                                 memcpy(ie, &in_ie[cnt], in_ie[cnt+1]+2);
 238
 239                         if (ielen)
 240                                 *ielen = in_ie[cnt+1]+2;
 241                         break;
 242                 } else {
 243                         cnt += in_ie[cnt + 1] + 2; /* goto next */
 244                 }
 245         }
 246
 247         return target_ie;
 248 }
 249
 250 /**
 251  * rtw_ies_remove_ie23a - Find matching IEs and remove
 252  * @ies: Address of IEs to search
 253  * @ies_len: Pointer of length of ies, will update to new length
 254  * @offset: The offset to start search
 255  * @eid: Element ID to match
 256  * @oui: OUI to match
 257  * @oui_len: OUI length
 258  *
 259  * Returns: _SUCCESS: ies is updated, _FAIL: not updated
 260  */
 261 int rtw_ies_remove_ie23a(u8 *ies, uint *ies_len, uint offset, u8 eid,
 262                       u8 *oui, u8 oui_len)
 263 {
 264         int ret = _FAIL;
 265         u8 *target_ie;
 266         u32 target_ielen;
 267         u8 *start;
 268         uint search_len;
 269
 270         if (!ies || !ies_len || *ies_len <= offset)
 271                 goto exit;
 272
 273         start = ies + offset;
 274         search_len = *ies_len - offset;
 275
 276         while (1) {
 277                 target_ie = rtw_get_ie23a_ex(start, search_len, eid, oui, oui_len,
 278                                           NULL, &target_ielen);
 279                 if (target_ie && target_ielen) {
 280                         u8 buf[MAX_IE_SZ] = {0};
 281                         u8 *remain_ies = target_ie + target_ielen;
 282                         uint remain_len = search_len - (remain_ies - start);
 283
 284                         memcpy(buf, remain_ies, remain_len);
 285                         memcpy(target_ie, buf, remain_len);
 286                         *ies_len = *ies_len - target_ielen;
 287                         ret = _SUCCESS;
 288
 289                         start = target_ie;
 290                         search_len = remain_len;
 291                 } else {
 292                         break;
 293                 }
 294         }
 295 exit:
 296         return ret;
 297 }
 298
 299 void rtw_set_supported_rate23a(u8 *SupportedRates, uint mode)
 300 {
 301
 302
 303         memset(SupportedRates, 0, NDIS_802_11_LENGTH_RATES_EX);
 304
 305         switch (mode) {
 306         case WIRELESS_11B:
 307                 memcpy(SupportedRates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
 308                 break;
 309
 310         case WIRELESS_11G:
 311         case WIRELESS_11A:
 312         case WIRELESS_11_5N:
 313         case WIRELESS_11A_5N:/* Todo: no basic rate for ofdm ? */
 314                 memcpy(SupportedRates, WIFI_OFDMRATES,
 315                        IEEE80211_NUM_OFDM_RATESLEN);
 316                 break;
 317
 318         case WIRELESS_11BG:
 319         case WIRELESS_11G_24N:
 320         case WIRELESS_11_24N:
 321         case WIRELESS_11BG_24N:
 322                 memcpy(SupportedRates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
 323                 memcpy(SupportedRates + IEEE80211_CCK_RATE_LEN, WIFI_OFDMRATES,
 324                        IEEE80211_NUM_OFDM_RATESLEN);
 325                 break;
 326         }
 327
 328 }
 329
 330 uint rtw_get_rateset_len23a(u8 *rateset)
 331 {
 332         uint i = 0;
 333
 334         while(1) {
 335                 if (rateset[i] == 0)
 336                         break;
 337
 338                 if (i > 12)
 339                         break;
 340
 341                 i++;
 342         }
 343
 344         return i;
 345 }
 346
 347 int rtw_generate_ie23a(struct registry_priv *pregistrypriv)
 348 {
 349         u8      wireless_mode;
 350         int     sz = 0, rateLen;
 351         struct wlan_bssid_ex *pdev_network = &pregistrypriv->dev_network;
 352         u8      *ie = pdev_network->IEs;
 353         u16     cap;
 354
 355         pdev_network->tsf = 0;
 356
 357         cap = WLAN_CAPABILITY_IBSS;
 358
 359         if (pregistrypriv->preamble == PREAMBLE_SHORT)
 360                 cap |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 361
 362         if (pdev_network->Privacy)
 363                 cap |= WLAN_CAPABILITY_PRIVACY;
 364
 365         pdev_network->capability = cap;
 366
 367         /* SSID */
 368         ie = rtw_set_ie23a(ie, WLAN_EID_SSID, pdev_network->Ssid.ssid_len,
 369                         pdev_network->Ssid.ssid, &sz);
 370
 371         /* supported rates */
 372         if (pregistrypriv->wireless_mode == WIRELESS_11ABGN) {
 373                 if (pdev_network->DSConfig > 14)
 374                         wireless_mode = WIRELESS_11A_5N;
 375                 else
 376                         wireless_mode = WIRELESS_11BG_24N;
 377         } else {
 378                 wireless_mode = pregistrypriv->wireless_mode;
 379         }
 380
 381         rtw_set_supported_rate23a(pdev_network->SupportedRates, wireless_mode) ;
 382
 383         rateLen = rtw_get_rateset_len23a(pdev_network->SupportedRates);
 384
 385         if (rateLen > 8) {
 386                 ie = rtw_set_ie23a(ie, WLAN_EID_SUPP_RATES, 8,
 387                                 pdev_network->SupportedRates, &sz);
 388                 /* ie = rtw_set_ie23a(ie, _EXT_SUPPORTEDRATES_IE_, (rateLen - 8), (pdev_network->SupportedRates + 8), &sz); */
 389         } else {
 390                 ie = rtw_set_ie23a(ie, WLAN_EID_SUPP_RATES, rateLen,
 391                                 pdev_network->SupportedRates, &sz);
 392         }
 393
 394         /* DS parameter set */
 395         ie = rtw_set_ie23a(ie, WLAN_EID_DS_PARAMS, 1,
 396                            (u8 *)&pdev_network->DSConfig, &sz);
 397
 398         /* IBSS Parameter Set */
 399
 400         ie = rtw_set_ie23a(ie, WLAN_EID_IBSS_PARAMS, 2,
 401                            (u8 *)&pdev_network->ATIMWindow, &sz);
 402
 403         if (rateLen > 8) {
 404                 ie = rtw_set_ie23a(ie, WLAN_EID_EXT_SUPP_RATES, (rateLen - 8),
 405                                 (pdev_network->SupportedRates + 8), &sz);
 406         }
 407
 408
 409
 410         /* return _SUCCESS; */
 411
 412         return sz;
 413 }
 414
 415 static int rtw_get_wpa_cipher_suite(const u8 *s)
 416 {
 417         if (!memcmp(s, WPA_CIPHER_SUITE_NONE23A, WPA_SELECTOR_LEN))
 418                 return WPA_CIPHER_NONE;
 419         if (!memcmp(s, WPA_CIPHER_SUITE_WEP4023A, WPA_SELECTOR_LEN))
 420                 return WPA_CIPHER_WEP40;
 421         if (!memcmp(s, WPA_CIPHER_SUITE_TKIP23A, WPA_SELECTOR_LEN))
 422                 return WPA_CIPHER_TKIP;
 423         if (!memcmp(s, WPA_CIPHER_SUITE_CCMP23A, WPA_SELECTOR_LEN))
 424                 return WPA_CIPHER_CCMP;
 425         if (!memcmp(s, WPA_CIPHER_SUITE_WEP10423A, WPA_SELECTOR_LEN))
 426                 return WPA_CIPHER_WEP104;
 427
 428         return 0;
 429 }
 430
 431 static int rtw_get_wpa2_cipher_suite(const u8 *s)
 432 {
 433         if (!memcmp(s, RSN_CIPHER_SUITE_NONE23A, RSN_SELECTOR_LEN))
 434                 return WPA_CIPHER_NONE;
 435         if (!memcmp(s, RSN_CIPHER_SUITE_WEP4023A, RSN_SELECTOR_LEN))
 436                 return WPA_CIPHER_WEP40;
 437         if (!memcmp(s, RSN_CIPHER_SUITE_TKIP23A, RSN_SELECTOR_LEN))
 438                 return WPA_CIPHER_TKIP;
 439         if (!memcmp(s, RSN_CIPHER_SUITE_CCMP23A, RSN_SELECTOR_LEN))
 440                 return WPA_CIPHER_CCMP;
 441         if (!memcmp(s, RSN_CIPHER_SUITE_WEP10423A, RSN_SELECTOR_LEN))
 442                 return WPA_CIPHER_WEP104;
 443
 444         return 0;
 445 }
 446
 447 int rtw_parse_wpa_ie23a(const u8 *wpa_ie, int wpa_ie_len, int *group_cipher,
 448                         int *pairwise_cipher, int *is_8021x)
 449 {
 450         int i, ret = _SUCCESS;
 451         int left, count;
 452         const u8 *pos;
 453
 454         if (wpa_ie_len <= 0) {
 455                 /* No WPA IE - fail silently */
 456                 return _FAIL;
 457         }
 458
 459         if (wpa_ie[1] != (u8)(wpa_ie_len - 2))
 460                 return _FAIL;
 461
 462         pos = wpa_ie;
 463
 464         pos += 8;
 465         left = wpa_ie_len - 8;
 466
 467         /* group_cipher */
 468         if (left >= WPA_SELECTOR_LEN) {
 469
 470                 *group_cipher = rtw_get_wpa_cipher_suite(pos);
 471
 472                 pos += WPA_SELECTOR_LEN;
 473                 left -= WPA_SELECTOR_LEN;
 474         } else if (left > 0) {
 475                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 476                          "%s: ie length mismatch, %u too much\n",
 477                          __func__, left);
 478
 479                 return _FAIL;
 480         }
 481
 482         /* pairwise_cipher */
 483         if (left >= 2) {
 484                 /* count = le16_to_cpu(*(u16*)pos); */
 485                 count = get_unaligned_le16(pos);
 486                 pos += 2;
 487                 left -= 2;
 488
 489                 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
 490                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 491                                  "%s: ie count botch (pairwise), count %u left %u\n",
 492                                  __func__, count, left);
 493                         return _FAIL;
 494                 }
 495
 496                 for (i = 0; i < count; i++) {
 497                         *pairwise_cipher |= rtw_get_wpa_cipher_suite(pos);
 498
 499                         pos += WPA_SELECTOR_LEN;
 500                         left -= WPA_SELECTOR_LEN;
 501                 }
 502         } else if (left == 1) {
 503                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 504                          "%s: ie too short (for key mgmt)\n", __func__);
 505                 return _FAIL;
 506         }
 507
 508         if (is_8021x) {
 509                 if (left >= 6) {
 510                         pos += 2;
 511                         if (!memcmp(pos, RTW_WPA_OUI23A_TYPE, 4)) {
 512                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 513                                          "%s : there has 802.1x auth\n",
 514                                          __func__);
 515                                 *is_8021x = 1;
 516                         }
 517                 }
 518         }
 519
 520         return ret;
 521 }
 522
 523 int rtw_parse_wpa2_ie23a(const u8 *rsn_ie, int rsn_ie_len, int *group_cipher,
 524                       int *pairwise_cipher, int *is_8021x)
 525 {
 526         int i, ret = _SUCCESS;
 527         int left, count;
 528         const u8 *pos;
 529         u8 SUITE_1X[4] = {0x00, 0x0f, 0xac, 0x01};
 530
 531         if (rsn_ie_len <= 0) {
 532                 /* No RSN IE - fail silently */
 533                 return _FAIL;
 534         }
 535
 536         if (*rsn_ie != WLAN_EID_RSN || *(rsn_ie+1) != (u8)(rsn_ie_len - 2)) {
 537                 return _FAIL;
 538         }
 539
 540         pos = rsn_ie;
 541         pos += 4;
 542         left = rsn_ie_len - 4;
 543
 544         /* group_cipher */
 545         if (left >= RSN_SELECTOR_LEN) {
 546                 *group_cipher = rtw_get_wpa2_cipher_suite(pos);
 547
 548                 pos += RSN_SELECTOR_LEN;
 549                 left -= RSN_SELECTOR_LEN;
 550         } else if (left > 0) {
 551                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 552                          "%s: ie length mismatch, %u too much\n",
 553                          __func__, left);
 554                 return _FAIL;
 555         }
 556
 557         /* pairwise_cipher */
 558         if (left >= 2) {
 559                 /* count = le16_to_cpu(*(u16*)pos); */
 560                 count = get_unaligned_le16(pos);
 561                 pos += 2;
 562                 left -= 2;
 563
 564                 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
 565                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 566                                  "%s: ie count botch (pairwise), count %u left %u\n",
 567                                  __func__, count, left);
 568                         return _FAIL;
 569                 }
 570
 571                 for (i = 0; i < count; i++) {
 572                         *pairwise_cipher |= rtw_get_wpa2_cipher_suite(pos);
 573
 574                         pos += RSN_SELECTOR_LEN;
 575                         left -= RSN_SELECTOR_LEN;
 576                 }
 577         } else if (left == 1) {
 578                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 579                          "%s: ie too short (for key mgmt)\n",  __func__);
 580
 581                 return _FAIL;
 582         }
 583
 584         if (is_8021x) {
 585                 if (left >= 6) {
 586                         pos += 2;
 587                         if (!memcmp(pos, SUITE_1X, 4)) {
 588                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 589                                          "%s (): there has 802.1x auth\n",
 590                                          __func__);
 591                                 *is_8021x = 1;
 592                         }
 593                 }
 594         }
 595
 596         return ret;
 597 }
 598
 599 /**
 600  * rtw_get_wps_attr23a - Search a specific WPS attribute from a given WPS IE
 601  * @wps_ie: Address of WPS IE to search
 602  * @wps_ielen: Length limit from wps_ie
 603  * @target_attr_id: The attribute ID of WPS attribute to search
 604  * @buf_attr: If not NULL and the WPS attribute is found, WPS attribute
 605  *            will be copied to the buf starting from buf_attr
 606  * @len_attr: If not NULL and the WPS attribute is found, will set to the
 607  *            length of the entire WPS attribute
 608  *
 609  * Returns: the address of the specific WPS attribute found, or NULL
 610  */
 611 const u8 *rtw_get_wps_attr23a(const u8 *wps_ie, uint wps_ielen,
 612                               u16 target_attr_id, u8 *buf_attr, u32 *len_attr)
 613 {
 614         const u8 *attr_ptr = NULL;
 615         const u8 *target_attr_ptr = NULL;
 616         u8 wps_oui[4] = {0x00, 0x50, 0xF2, 0x04};
 617
 618         if (len_attr)
 619                 *len_attr = 0;
 620
 621         if (wps_ie[0] != WLAN_EID_VENDOR_SPECIFIC ||
 622             memcmp(wps_ie + 2, wps_oui, 4)) {
 623                 return attr_ptr;
 624         }
 625
 626         /*  6 = 1(Element ID) + 1(Length) + 4(WPS OUI) */
 627         attr_ptr = wps_ie + 6; /* goto first attr */
 628
 629         while (attr_ptr - wps_ie < wps_ielen) {
 630                 /*  4 = 2(Attribute ID) + 2(Length) */
 631                 u16 attr_id = get_unaligned_be16(attr_ptr);
 632                 u16 attr_data_len = get_unaligned_be16(attr_ptr + 2);
 633                 u16 attr_len = attr_data_len + 4;
 634
 635                 /* DBG_8723A("%s attr_ptr:%p, id:%u, length:%u\n", __func__, attr_ptr, attr_id, attr_data_len); */
 636                 if (attr_id == target_attr_id) {
 637                         target_attr_ptr = attr_ptr;
 638
 639                         if (buf_attr)
 640                                 memcpy(buf_attr, attr_ptr, attr_len);
 641
 642                         if (len_attr)
 643                                 *len_attr = attr_len;
 644
 645                         break;
 646                 } else {
 647                         attr_ptr += attr_len; /* goto next */
 648                 }
 649         }
 650
 651         return target_attr_ptr;
 652 }
 653
 654 /**
 655  * rtw_get_wps_attr_content23a - Search a specific WPS attribute content
 656  * from a given WPS IE
 657  * @wps_ie: Address of WPS IE to search
 658  * @wps_ielen: Length limit from wps_ie
 659  * @target_attr_id: The attribute ID of WPS attribute to search
 660  * @buf_content: If not NULL and the WPS attribute is found, WPS attribute
 661  *               content will be copied to the buf starting from buf_content
 662  * @len_content: If not NULL and the WPS attribute is found, will set to the
 663  *               length of the WPS attribute content
 664  *
 665  * Returns: the address of the specific WPS attribute content found, or NULL
 666  */
 667 const u8 *rtw_get_wps_attr_content23a(const u8 *wps_ie, uint wps_ielen,
 668                                       u16 target_attr_id, u8 *buf_content)
 669 {
 670         const u8 *attr_ptr;
 671         u32 attr_len;
 672
 673         attr_ptr = rtw_get_wps_attr23a(wps_ie, wps_ielen, target_attr_id,
 674                                     NULL, &attr_len);
 675
 676         if (attr_ptr && attr_len) {
 677                 if (buf_content)
 678                         memcpy(buf_content, attr_ptr + 4, attr_len - 4);
 679
 680                 return attr_ptr + 4;
 681         }
 682
 683         return NULL;
 684 }
 685
 686 static int rtw_get_cipher_info(struct wlan_network *pnetwork)
 687 {
 688         const u8 *pbuf;
 689         int group_cipher = 0, pairwise_cipher = 0, is8021x = 0;
 690         int ret = _FAIL;
 691         int r, plen;
 692         char *pie;
 693
 694         pie = pnetwork->network.IEs;
 695         plen = pnetwork->network.IELength;
 696
 697         pbuf = cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT,
 698                                        WLAN_OUI_TYPE_MICROSOFT_WPA, pie, plen);
 699
 700         if (pbuf && pbuf[1] > 0) {
 701                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 702                          "rtw_get_cipher_info: wpa_ielen: %d\n", pbuf[1]);
 703                 r = rtw_parse_wpa_ie23a(pbuf, pbuf[1] + 2, &group_cipher,
 704                                      &pairwise_cipher, &is8021x);
 705                 if (r == _SUCCESS) {
 706                         pnetwork->BcnInfo.pairwise_cipher = pairwise_cipher;
 707                         pnetwork->BcnInfo.group_cipher = group_cipher;
 708                         pnetwork->BcnInfo.is_8021x = is8021x;
 709                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 710                                  "%s: pnetwork->pairwise_cipher: %d, is_8021x is %d\n",
 711                                  __func__, pnetwork->BcnInfo.pairwise_cipher,
 712                                  pnetwork->BcnInfo.is_8021x);
 713                         ret = _SUCCESS;
 714                 }
 715         } else {
 716                 pbuf = cfg80211_find_ie(WLAN_EID_RSN, pie, plen);
 717
 718                 if (pbuf && pbuf[1] > 0) {
 719                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 720                                  "get RSN IE\n");
 721                         r = rtw_parse_wpa2_ie23a(pbuf, pbuf[1] + 2,
 722                                               &group_cipher, &pairwise_cipher,
 723                                               &is8021x);
 724                         if (r == _SUCCESS) {
 725                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 726                                          "get RSN IE  OK!!!\n");
 727                                 pnetwork->BcnInfo.pairwise_cipher =
 728                                         pairwise_cipher;
 729                                 pnetwork->BcnInfo.group_cipher = group_cipher;
 730                                 pnetwork->BcnInfo.is_8021x = is8021x;
 731                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 732                                          "%s: pnetwork->pairwise_cipher: %d,pnetwork->group_cipher is %d, is_8021x is %d\n",
 733                                          __func__,
 734                                          pnetwork->BcnInfo.pairwise_cipher,
 735                                          pnetwork->BcnInfo.group_cipher,
 736                                          pnetwork->BcnInfo.is_8021x);
 737                                 ret = _SUCCESS;
 738                         }
 739                 }
 740         }
 741
 742         return ret;
 743 }
 744
 745 void rtw_get_bcn_info23a(struct wlan_network *pnetwork)
 746 {
 747         u8 bencrypt = 0;
 748         int pie_len;
 749         u8 *pie;
 750         const u8 *p;
 751
 752         if (pnetwork->network.capability & WLAN_CAPABILITY_PRIVACY) {
 753                 bencrypt = 1;
 754                 pnetwork->network.Privacy = 1;
 755         } else
 756                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_OPENSYS;
 757
 758         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 759                  "%s: ssid =%s\n", __func__, pnetwork->network.Ssid.ssid);
 760
 761         pie = pnetwork->network.IEs;
 762         pie_len = pnetwork->network.IELength;
 763
 764         p = cfg80211_find_ie(WLAN_EID_RSN, pie, pie_len);
 765         if (p && p[1]) {
 766                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA2;
 767         } else if (cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT,
 768                                            WLAN_OUI_TYPE_MICROSOFT_WPA,
 769                                            pie, pie_len)) {
 770                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA;
 771         } else {
 772                 if (bencrypt)
 773                         pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WEP;
 774         }
 775         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 776                  "%s: pnetwork->encryp_protocol is %x\n", __func__,
 777                  pnetwork->BcnInfo.encryp_protocol);
 778         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 779                  "%s: pnetwork->encryp_protocol is %x\n", __func__,
 780                  pnetwork->BcnInfo.encryp_protocol);
 781         rtw_get_cipher_info(pnetwork);
 782
 783         /* get bwmode and ch_offset */
 784 }
 785
 786 /* show MCS rate, unit: 100Kbps */
 787 u16 rtw_mcs_rate23a(u8 rf_type, u8 bw_40MHz, u8 short_GI_20, u8 short_GI_40,
 788                     struct ieee80211_mcs_info *mcs)
 789 {
 790         u16 max_rate = 0;
 791
 792         if (rf_type == RF_1T1R) {
 793                 if (mcs->rx_mask[0] & BIT(7))
 794                         max_rate = (bw_40MHz) ? ((short_GI_40)?1500:1350):
 795                                 ((short_GI_20)?722:650);
 796                 else if (mcs->rx_mask[0] & BIT(6))
 797                         max_rate = (bw_40MHz) ? ((short_GI_40)?1350:1215):
 798                                 ((short_GI_20)?650:585);
 799                 else if (mcs->rx_mask[0] & BIT(5))
 800                         max_rate = (bw_40MHz) ? ((short_GI_40)?1200:1080):
 801                                 ((short_GI_20)?578:520);
 802                 else if (mcs->rx_mask[0] & BIT(4))
 803                         max_rate = (bw_40MHz) ? ((short_GI_40)?900:810):
 804                                 ((short_GI_20)?433:390);
 805                 else if (mcs->rx_mask[0] & BIT(3))
 806                         max_rate = (bw_40MHz) ? ((short_GI_40)?600:540):
 807                                 ((short_GI_20)?289:260);
 808                 else if (mcs->rx_mask[0] & BIT(2))
 809                         max_rate = (bw_40MHz) ? ((short_GI_40)?450:405):
 810                                 ((short_GI_20)?217:195);
 811                 else if (mcs->rx_mask[0] & BIT(1))
 812                         max_rate = (bw_40MHz) ? ((short_GI_40)?300:270):
 813                                 ((short_GI_20)?144:130);
 814                 else if (mcs->rx_mask[0] & BIT(0))
 815                         max_rate = (bw_40MHz) ? ((short_GI_40)?150:135):
 816                                 ((short_GI_20)?72:65);
 817         } else {
 818                 if (mcs->rx_mask[1]) {
 819                         if (mcs->rx_mask[1] & BIT(7))
 820                                 max_rate = (bw_40MHz) ? ((short_GI_40)?3000:2700):((short_GI_20)?1444:1300);
 821                         else if (mcs->rx_mask[1] & BIT(6))
 822                                 max_rate = (bw_40MHz) ? ((short_GI_40)?2700:2430):((short_GI_20)?1300:1170);
 823                         else if (mcs->rx_mask[1] & BIT(5))
 824                                 max_rate = (bw_40MHz) ? ((short_GI_40)?2400:2160):((short_GI_20)?1156:1040);
 825                         else if (mcs->rx_mask[1] & BIT(4))
 826                                 max_rate = (bw_40MHz) ? ((short_GI_40)?1800:1620):((short_GI_20)?867:780);
 827                         else if (mcs->rx_mask[1] & BIT(3))
 828                                 max_rate = (bw_40MHz) ? ((short_GI_40)?1200:1080):((short_GI_20)?578:520);
 829                         else if (mcs->rx_mask[1] & BIT(2))
 830                                 max_rate = (bw_40MHz) ? ((short_GI_40)?900:810):((short_GI_20)?433:390);
 831                         else if (mcs->rx_mask[1] & BIT(1))
 832                                 max_rate = (bw_40MHz) ? ((short_GI_40)?600:540):((short_GI_20)?289:260);
 833                         else if (mcs->rx_mask[1] & BIT(0))
 834                                 max_rate = (bw_40MHz) ? ((short_GI_40)?300:270):((short_GI_20)?144:130);
 835                 } else {
 836                         if (mcs->rx_mask[0] & BIT(7))
 837                                 max_rate = (bw_40MHz) ? ((short_GI_40)?1500:1350):((short_GI_20)?722:650);
 838                         else if (mcs->rx_mask[0] & BIT(6))
 839                                 max_rate = (bw_40MHz) ? ((short_GI_40)?1350:1215):((short_GI_20)?650:585);
 840                         else if (mcs->rx_mask[0] & BIT(5))
 841                                 max_rate = (bw_40MHz) ? ((short_GI_40)?1200:1080):((short_GI_20)?578:520);
 842                         else if (mcs->rx_mask[0] & BIT(4))
 843                                 max_rate = (bw_40MHz) ? ((short_GI_40)?900:810):((short_GI_20)?433:390);
 844                         else if (mcs->rx_mask[0] & BIT(3))
 845                                 max_rate = (bw_40MHz) ? ((short_GI_40)?600:540):((short_GI_20)?289:260);
 846                         else if (mcs->rx_mask[0] & BIT(2))
 847                                 max_rate = (bw_40MHz) ? ((short_GI_40)?450:405):((short_GI_20)?217:195);
 848                         else if (mcs->rx_mask[0] & BIT(1))
 849                                 max_rate = (bw_40MHz) ? ((short_GI_40)?300:270):((short_GI_20)?144:130);
 850                         else if (mcs->rx_mask[0] & BIT(0))
 851                                 max_rate = (bw_40MHz) ? ((short_GI_40)?150:135):((short_GI_20)?72:65);
 852                 }
 853         }
 854         return max_rate;
 855 }