kernel/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, int *pairwise_cipher, int *is_8021x)
 448 {
 449         int i, ret = _SUCCESS;
 450         int left, count;
 451         const u8 *pos;
 452
 453         if (wpa_ie_len <= 0) {
 454                 /* No WPA IE - fail silently */
 455                 return _FAIL;
 456         }
 457
 458         if (wpa_ie[1] != (u8)(wpa_ie_len - 2))
 459                 return _FAIL;
 460
 461         pos = wpa_ie;
 462
 463         pos += 8;
 464         left = wpa_ie_len - 8;
 465
 466         /* group_cipher */
 467         if (left >= WPA_SELECTOR_LEN) {
 468
 469                 *group_cipher = rtw_get_wpa_cipher_suite(pos);
 470
 471                 pos += WPA_SELECTOR_LEN;
 472                 left -= WPA_SELECTOR_LEN;
 473         } else if (left > 0) {
 474                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 475                          "%s: ie length mismatch, %u too much\n",
 476                          __func__, left);
 477
 478                 return _FAIL;
 479         }
 480
 481         /* pairwise_cipher */
 482         if (left >= 2) {
 483                 /* count = le16_to_cpu(*(u16*)pos); */
 484                 count = get_unaligned_le16(pos);
 485                 pos += 2;
 486                 left -= 2;
 487
 488                 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
 489                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 490                                  "%s: ie count botch (pairwise), count %u left %u\n",
 491                                  __func__, count, left);
 492                         return _FAIL;
 493                 }
 494
 495                 for (i = 0; i < count; i++) {
 496                         *pairwise_cipher |= rtw_get_wpa_cipher_suite(pos);
 497
 498                         pos += WPA_SELECTOR_LEN;
 499                         left -= WPA_SELECTOR_LEN;
 500                 }
 501         } else if (left == 1) {
 502                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 503                          "%s: ie too short (for key mgmt)\n", __func__);
 504                 return _FAIL;
 505         }
 506
 507         if (is_8021x) {
 508                 if (left >= 6) {
 509                         pos += 2;
 510                         if (!memcmp(pos, RTW_WPA_OUI23A_TYPE, 4)) {
 511                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 512                                          "%s : there has 802.1x auth\n",
 513                                          __func__);
 514                                 *is_8021x = 1;
 515                         }
 516                 }
 517         }
 518
 519         return ret;
 520 }
 521
 522 int rtw_parse_wpa2_ie23a(const u8 *rsn_ie, int rsn_ie_len, int *group_cipher,
 523                       int *pairwise_cipher, int *is_8021x)
 524 {
 525         int i, ret = _SUCCESS;
 526         int left, count;
 527         const u8 *pos;
 528         u8 SUITE_1X[4] = {0x00, 0x0f, 0xac, 0x01};
 529
 530         if (rsn_ie_len <= 0) {
 531                 /* No RSN IE - fail silently */
 532                 return _FAIL;
 533         }
 534
 535         if (*rsn_ie != WLAN_EID_RSN || *(rsn_ie+1) != (u8)(rsn_ie_len - 2)) {
 536                 return _FAIL;
 537         }
 538
 539         pos = rsn_ie;
 540         pos += 4;
 541         left = rsn_ie_len - 4;
 542
 543         /* group_cipher */
 544         if (left >= RSN_SELECTOR_LEN) {
 545                 *group_cipher = rtw_get_wpa2_cipher_suite(pos);
 546
 547                 pos += RSN_SELECTOR_LEN;
 548                 left -= RSN_SELECTOR_LEN;
 549         } else if (left > 0) {
 550                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 551                          "%s: ie length mismatch, %u too much\n",
 552                          __func__, left);
 553                 return _FAIL;
 554         }
 555
 556         /* pairwise_cipher */
 557         if (left >= 2) {
 558                 /* count = le16_to_cpu(*(u16*)pos); */
 559                 count = get_unaligned_le16(pos);
 560                 pos += 2;
 561                 left -= 2;
 562
 563                 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
 564                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 565                                  "%s: ie count botch (pairwise), count %u left %u\n",
 566                                  __func__, count, left);
 567                         return _FAIL;
 568                 }
 569
 570                 for (i = 0; i < count; i++) {
 571                         *pairwise_cipher |= rtw_get_wpa2_cipher_suite(pos);
 572
 573                         pos += RSN_SELECTOR_LEN;
 574                         left -= RSN_SELECTOR_LEN;
 575                 }
 576         } else if (left == 1) {
 577                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_,
 578                          "%s: ie too short (for key mgmt)\n",  __func__);
 579
 580                 return _FAIL;
 581         }
 582
 583         if (is_8021x) {
 584                 if (left >= 6) {
 585                         pos += 2;
 586                         if (!memcmp(pos, SUITE_1X, 4)) {
 587                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 588                                          "%s (): there has 802.1x auth\n",
 589                                          __func__);
 590                                 *is_8021x = 1;
 591                         }
 592                 }
 593         }
 594
 595         return ret;
 596 }
 597
 598 /**
 599  * rtw_get_wps_attr23a - Search a specific WPS attribute from a given WPS IE
 600  * @wps_ie: Address of WPS IE to search
 601  * @wps_ielen: Length limit from wps_ie
 602  * @target_attr_id: The attribute ID of WPS attribute to search
 603  * @buf_attr: If not NULL and the WPS attribute is found, WPS attribute
 604  *            will be copied to the buf starting from buf_attr
 605  * @len_attr: If not NULL and the WPS attribute is found, will set to the
 606  *            length of the entire WPS attribute
 607  *
 608  * Returns: the address of the specific WPS attribute found, or NULL
 609  */
 610 const u8 *rtw_get_wps_attr23a(const u8 *wps_ie, uint wps_ielen,
 611                               u16 target_attr_id, u8 *buf_attr, u32 *len_attr)
 612 {
 613         const u8 *attr_ptr = NULL;
 614         const 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] != WLAN_EID_VENDOR_SPECIFIC ||
 621             memcmp(wps_ie + 2, wps_oui, 4)) {
 622                 return attr_ptr;
 623         }
 624
 625         /*  6 = 1(Element ID) + 1(Length) + 4(WPS OUI) */
 626         attr_ptr = wps_ie + 6; /* goto first attr */
 627
 628         while (attr_ptr - wps_ie < wps_ielen) {
 629                 /*  4 = 2(Attribute ID) + 2(Length) */
 630                 u16 attr_id = get_unaligned_be16(attr_ptr);
 631                 u16 attr_data_len = get_unaligned_be16(attr_ptr + 2);
 632                 u16 attr_len = attr_data_len + 4;
 633
 634                 /* DBG_8723A("%s attr_ptr:%p, id:%u, length:%u\n", __func__, attr_ptr, attr_id, attr_data_len); */
 635                 if (attr_id == target_attr_id) {
 636                         target_attr_ptr = attr_ptr;
 637
 638                         if (buf_attr)
 639                                 memcpy(buf_attr, attr_ptr, attr_len);
 640
 641                         if (len_attr)
 642                                 *len_attr = attr_len;
 643
 644                         break;
 645                 } else {
 646                         attr_ptr += attr_len; /* goto next */
 647                 }
 648         }
 649
 650         return target_attr_ptr;
 651 }
 652
 653 /**
 654  * rtw_get_wps_attr_content23a - Search a specific WPS attribute content
 655  * from a given WPS IE
 656  * @wps_ie: Address of WPS IE to search
 657  * @wps_ielen: Length limit from wps_ie
 658  * @target_attr_id: The attribute ID of WPS attribute to search
 659  * @buf_content: If not NULL and the WPS attribute is found, WPS attribute
 660  *               content will be copied to the buf starting from buf_content
 661  * @len_content: If not NULL and the WPS attribute is found, will set to the
 662  *               length of the WPS attribute content
 663  *
 664  * Returns: the address of the specific WPS attribute content found, or NULL
 665  */
 666 const u8 *rtw_get_wps_attr_content23a(const u8 *wps_ie, uint wps_ielen,
 667                                       u16 target_attr_id, u8 *buf_content)
 668 {
 669         const u8 *attr_ptr;
 670         u32 attr_len;
 671
 672         attr_ptr = rtw_get_wps_attr23a(wps_ie, wps_ielen, target_attr_id,
 673                                     NULL, &attr_len);
 674
 675         if (attr_ptr && attr_len) {
 676                 if (buf_content)
 677                         memcpy(buf_content, attr_ptr + 4, attr_len - 4);
 678
 679                 return attr_ptr + 4;
 680         }
 681
 682         return NULL;
 683 }
 684
 685 static int rtw_get_cipher_info(struct wlan_network *pnetwork)
 686 {
 687         const u8 *pbuf;
 688         int group_cipher = 0, pairwise_cipher = 0, is8021x = 0;
 689         int ret = _FAIL;
 690         int r, plen;
 691         char *pie;
 692
 693         pie = pnetwork->network.IEs;
 694         plen = pnetwork->network.IELength;
 695
 696         pbuf = cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT,
 697                                        WLAN_OUI_TYPE_MICROSOFT_WPA, pie, plen);
 698
 699         if (pbuf && pbuf[1] > 0) {
 700                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 701                          "rtw_get_cipher_info: wpa_ielen: %d\n", pbuf[1]);
 702                 r = rtw_parse_wpa_ie23a(pbuf, pbuf[1] + 2, &group_cipher,
 703                                      &pairwise_cipher, &is8021x);
 704                 if (r == _SUCCESS) {
 705                         pnetwork->BcnInfo.pairwise_cipher = pairwise_cipher;
 706                         pnetwork->BcnInfo.group_cipher = group_cipher;
 707                         pnetwork->BcnInfo.is_8021x = is8021x;
 708                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 709                                  "%s: pnetwork->pairwise_cipher: %d, is_8021x is %d\n",
 710                                  __func__, pnetwork->BcnInfo.pairwise_cipher,
 711                                  pnetwork->BcnInfo.is_8021x);
 712                         ret = _SUCCESS;
 713                 }
 714         } else {
 715                 pbuf = cfg80211_find_ie(WLAN_EID_RSN, pie, plen);
 716
 717                 if (pbuf && pbuf[1] > 0) {
 718                         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 719                                  "get RSN IE\n");
 720                         r = rtw_parse_wpa2_ie23a(pbuf, pbuf[1] + 2,
 721                                               &group_cipher, &pairwise_cipher,
 722                                               &is8021x);
 723                         if (r == _SUCCESS) {
 724                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 725                                          "get RSN IE  OK!!!\n");
 726                                 pnetwork->BcnInfo.pairwise_cipher =
 727                                         pairwise_cipher;
 728                                 pnetwork->BcnInfo.group_cipher = group_cipher;
 729                                 pnetwork->BcnInfo.is_8021x = is8021x;
 730                                 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 731                                          "%s: pnetwork->pairwise_cipher: %d,pnetwork->group_cipher is %d, is_8021x is %d\n",
 732                                          __func__,
 733                                          pnetwork->BcnInfo.pairwise_cipher,
 734                                          pnetwork->BcnInfo.group_cipher,
 735                                          pnetwork->BcnInfo.is_8021x);
 736                                 ret = _SUCCESS;
 737                         }
 738                 }
 739         }
 740
 741         return ret;
 742 }
 743
 744 void rtw_get_bcn_info23a(struct wlan_network *pnetwork)
 745 {
 746         u8 bencrypt = 0;
 747         int pie_len;
 748         u8 *pie;
 749         const u8 *p;
 750
 751         if (pnetwork->network.capability & WLAN_CAPABILITY_PRIVACY) {
 752                 bencrypt = 1;
 753                 pnetwork->network.Privacy = 1;
 754         } else
 755                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_OPENSYS;
 756
 757         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 758                  "%s: ssid =%s\n", __func__, pnetwork->network.Ssid.ssid);
 759
 760         pie = pnetwork->network.IEs;
 761         pie_len = pnetwork->network.IELength;
 762
 763         p = cfg80211_find_ie(WLAN_EID_RSN, pie, pie_len);
 764         if (p && p[1]) {
 765                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA2;
 766         } else if (cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT,
 767                                            WLAN_OUI_TYPE_MICROSOFT_WPA,
 768                                            pie, pie_len)) {
 769                 pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA;
 770         } else {
 771                 if (bencrypt)
 772                         pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WEP;
 773         }
 774         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 775                  "%s: pnetwork->encryp_protocol is %x\n", __func__,
 776                  pnetwork->BcnInfo.encryp_protocol);
 777         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_,
 778                  "%s: pnetwork->encryp_protocol is %x\n", __func__,
 779                  pnetwork->BcnInfo.encryp_protocol);
 780         rtw_get_cipher_info(pnetwork);
 781
 782         /* get bwmode and ch_offset */
 783 }
 784
 785 /* show MCS rate, unit: 100Kbps */
 786 u16 rtw_mcs_rate23a(u8 rf_type, u8 bw_40MHz, u8 short_GI_20, u8 short_GI_40,
 787                     struct ieee80211_mcs_info *mcs)
 788 {
 789         u16 max_rate = 0;
 790
 791         if (rf_type == RF_1T1R) {
 792                 if (mcs->rx_mask[0] & BIT(7))
 793                         max_rate = (bw_40MHz) ? ((short_GI_40)?1500:1350):
 794                                 ((short_GI_20)?722:650);
 795                 else if (mcs->rx_mask[0] & BIT(6))
 796                         max_rate = (bw_40MHz) ? ((short_GI_40)?1350:1215):
 797                                 ((short_GI_20)?650:585);
 798                 else if (mcs->rx_mask[0] & BIT(5))
 799                         max_rate = (bw_40MHz) ? ((short_GI_40)?1200:1080):
 800                                 ((short_GI_20)?578:520);
 801                 else if (mcs->rx_mask[0] & BIT(4))
 802                         max_rate = (bw_40MHz) ? ((short_GI_40)?900:810):
 803                                 ((short_GI_20)?433:390);
 804                 else if (mcs->rx_mask[0] & BIT(3))
 805                         max_rate = (bw_40MHz) ? ((short_GI_40)?600:540):
 806                                 ((short_GI_20)?289:260);
 807                 else if (mcs->rx_mask[0] & BIT(2))
 808                         max_rate = (bw_40MHz) ? ((short_GI_40)?450:405):
 809                                 ((short_GI_20)?217:195);
 810                 else if (mcs->rx_mask[0] & BIT(1))
 811                         max_rate = (bw_40MHz) ? ((short_GI_40)?300:270):
 812                                 ((short_GI_20)?144:130);
 813                 else if (mcs->rx_mask[0] & BIT(0))
 814                         max_rate = (bw_40MHz) ? ((short_GI_40)?150:135):
 815                                 ((short_GI_20)?72:65);
 816         } else {
 817                 if (mcs->rx_mask[1]) {
 818                         if (mcs->rx_mask[1] & BIT(7))
 819                                 max_rate = (bw_40MHz) ? ((short_GI_40)?3000:2700):((short_GI_20)?1444:1300);
 820                         else if (mcs->rx_mask[1] & BIT(6))
 821                                 max_rate = (bw_40MHz) ? ((short_GI_40)?2700:2430):((short_GI_20)?1300:1170);
 822                         else if (mcs->rx_mask[1] & BIT(5))
 823                                 max_rate = (bw_40MHz) ? ((short_GI_40)?2400:2160):((short_GI_20)?1156:1040);
 824                         else if (mcs->rx_mask[1] & BIT(4))
 825                                 max_rate = (bw_40MHz) ? ((short_GI_40)?1800:1620):((short_GI_20)?867:780);
 826                         else if (mcs->rx_mask[1] & BIT(3))
 827                                 max_rate = (bw_40MHz) ? ((short_GI_40)?1200:1080):((short_GI_20)?578:520);
 828                         else if (mcs->rx_mask[1] & BIT(2))
 829                                 max_rate = (bw_40MHz) ? ((short_GI_40)?900:810):((short_GI_20)?433:390);
 830                         else if (mcs->rx_mask[1] & BIT(1))
 831                                 max_rate = (bw_40MHz) ? ((short_GI_40)?600:540):((short_GI_20)?289:260);
 832                         else if (mcs->rx_mask[1] & BIT(0))
 833                                 max_rate = (bw_40MHz) ? ((short_GI_40)?300:270):((short_GI_20)?144:130);
 834                 } else {
 835                         if (mcs->rx_mask[0] & BIT(7))
 836                                 max_rate = (bw_40MHz) ? ((short_GI_40)?1500:1350):((short_GI_20)?722:650);
 837                         else if (mcs->rx_mask[0] & BIT(6))
 838                                 max_rate = (bw_40MHz) ? ((short_GI_40)?1350:1215):((short_GI_20)?650:585);
 839                         else if (mcs->rx_mask[0] & BIT(5))
 840                                 max_rate = (bw_40MHz) ? ((short_GI_40)?1200:1080):((short_GI_20)?578:520);
 841                         else if (mcs->rx_mask[0] & BIT(4))
 842                                 max_rate = (bw_40MHz) ? ((short_GI_40)?900:810):((short_GI_20)?433:390);
 843                         else if (mcs->rx_mask[0] & BIT(3))
 844                                 max_rate = (bw_40MHz) ? ((short_GI_40)?600:540):((short_GI_20)?289:260);
 845                         else if (mcs->rx_mask[0] & BIT(2))
 846                                 max_rate = (bw_40MHz) ? ((short_GI_40)?450:405):((short_GI_20)?217:195);
 847                         else if (mcs->rx_mask[0] & BIT(1))
 848                                 max_rate = (bw_40MHz) ? ((short_GI_40)?300:270):((short_GI_20)?144:130);
 849                         else if (mcs->rx_mask[0] & BIT(0))
 850                                 max_rate = (bw_40MHz) ? ((short_GI_40)?150:135):((short_GI_20)?72:65);
 851                 }
 852         }
 853         return max_rate;
 854 }