1 // SPDX-License-Identifier: GPL-2.0 2 /****************************************************************************** 3 * 4 * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved. 5 * 6 ******************************************************************************/ 7 8 #include <drv_types.h> 9 #include <rtw_debug.h> 10 #include <linux/of.h> 11 #include <asm/unaligned.h> 12 13 u8 RTW_WPA_OUI_TYPE[] = { 0x00, 0x50, 0xf2, 1 }; 14 u16 RTW_WPA_VERSION = 1; 15 u8 WPA_AUTH_KEY_MGMT_NONE[] = { 0x00, 0x50, 0xf2, 0 }; 16 u8 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x50, 0xf2, 1 }; 17 u8 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x50, 0xf2, 2 }; 18 u8 WPA_CIPHER_SUITE_NONE[] = { 0x00, 0x50, 0xf2, 0 }; 19 u8 WPA_CIPHER_SUITE_WEP40[] = { 0x00, 0x50, 0xf2, 1 }; 20 u8 WPA_CIPHER_SUITE_TKIP[] = { 0x00, 0x50, 0xf2, 2 }; 21 u8 WPA_CIPHER_SUITE_WRAP[] = { 0x00, 0x50, 0xf2, 3 }; 22 u8 WPA_CIPHER_SUITE_CCMP[] = { 0x00, 0x50, 0xf2, 4 }; 23 u8 WPA_CIPHER_SUITE_WEP104[] = { 0x00, 0x50, 0xf2, 5 }; 24 25 u16 RSN_VERSION_BSD = 1; 26 u8 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x0f, 0xac, 1 }; 27 u8 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x0f, 0xac, 2 }; 28 u8 RSN_CIPHER_SUITE_NONE[] = { 0x00, 0x0f, 0xac, 0 }; 29 u8 RSN_CIPHER_SUITE_WEP40[] = { 0x00, 0x0f, 0xac, 1 }; 30 u8 RSN_CIPHER_SUITE_TKIP[] = { 0x00, 0x0f, 0xac, 2 }; 31 u8 RSN_CIPHER_SUITE_WRAP[] = { 0x00, 0x0f, 0xac, 3 }; 32 u8 RSN_CIPHER_SUITE_CCMP[] = { 0x00, 0x0f, 0xac, 4 }; 33 u8 RSN_CIPHER_SUITE_WEP104[] = { 0x00, 0x0f, 0xac, 5 }; 34 /* */ 35 /* for adhoc-master to generate ie and provide supported-rate to fw */ 36 /* */ 37 38 static u8 WIFI_CCKRATES[] = { 39 (IEEE80211_CCK_RATE_1MB | IEEE80211_BASIC_RATE_MASK), 40 (IEEE80211_CCK_RATE_2MB | IEEE80211_BASIC_RATE_MASK), 41 (IEEE80211_CCK_RATE_5MB | IEEE80211_BASIC_RATE_MASK), 42 (IEEE80211_CCK_RATE_11MB | IEEE80211_BASIC_RATE_MASK) 43 }; 44 45 static u8 WIFI_OFDMRATES[] = { 46 (IEEE80211_OFDM_RATE_6MB), 47 (IEEE80211_OFDM_RATE_9MB), 48 (IEEE80211_OFDM_RATE_12MB), 49 (IEEE80211_OFDM_RATE_18MB), 50 (IEEE80211_OFDM_RATE_24MB), 51 IEEE80211_OFDM_RATE_36MB, 52 IEEE80211_OFDM_RATE_48MB, 53 IEEE80211_OFDM_RATE_54MB 54 }; 55 56 int rtw_get_bit_value_from_ieee_value(u8 val) 57 { 58 unsigned char dot11_rate_table[] = {2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108, 0}; /* last element must be zero!! */ 59 int i = 0; 60 61 while (dot11_rate_table[i] != 0) { 62 if (dot11_rate_table[i] == val) 63 return BIT(i); 64 i++; 65 } 66 return 0; 67 } 68 69 bool rtw_is_cckrates_included(u8 *rate) 70 { 71 while (*rate) { 72 u8 r = *rate & 0x7f; 73 74 if (r == 2 || r == 4 || r == 11 || r == 22) 75 return true; 76 rate++; 77 } 78 79 return false; 80 } 81 82 bool rtw_is_cckratesonly_included(u8 *rate) 83 { 84 while (*rate) { 85 u8 r = *rate & 0x7f; 86 87 if (r != 2 && r != 4 && r != 11 && r != 22) 88 return false; 89 rate++; 90 } 91 92 return true; 93 } 94 95 int rtw_check_network_type(unsigned char *rate, int ratelen, int channel) 96 { 97 if (channel > 14) 98 return WIRELESS_INVALID; 99 /* could be pure B, pure G, or B/G */ 100 if (rtw_is_cckratesonly_included(rate)) 101 return WIRELESS_11B; 102 if (rtw_is_cckrates_included(rate)) 103 return WIRELESS_11BG; 104 return WIRELESS_11G; 105 } 106 107 u8 *rtw_set_fixed_ie(unsigned char *pbuf, unsigned int len, unsigned char *source, 108 unsigned int *frlen) 109 { 110 memcpy((void *)pbuf, (void *)source, len); 111 *frlen = *frlen + len; 112 return pbuf + len; 113 } 114 115 /* rtw_set_ie will update frame length */ 116 u8 *rtw_set_ie(u8 *pbuf, 117 signed int index, 118 uint len, 119 u8 *source, 120 uint *frlen) /* frame length */ 121 { 122 *pbuf = (u8)index; 123 124 *(pbuf + 1) = (u8)len; 125 126 if (len > 0) 127 memcpy((void *)(pbuf + 2), (void *)source, len); 128 129 *frlen = *frlen + (len + 2); 130 131 return pbuf + len + 2; 132 } 133 134 /*---------------------------------------------------------------------------- 135 index: the information element id index, limit is the limit for search 136 -----------------------------------------------------------------------------*/ 137 u8 *rtw_get_ie(u8 *pbuf, signed int index, signed int *len, signed int limit) 138 { 139 signed int tmp, i; 140 u8 *p; 141 142 if (limit < 1) 143 return NULL; 144 145 p = pbuf; 146 i = 0; 147 *len = 0; 148 while (1) { 149 if (*p == index) { 150 *len = *(p + 1); 151 return p; 152 } 153 tmp = *(p + 1); 154 p += (tmp + 2); 155 i += (tmp + 2); 156 if (i >= limit) 157 break; 158 } 159 return NULL; 160 } 161 162 /** 163 * rtw_get_ie_ex - Search specific IE from a series of IEs 164 * @in_ie: Address of IEs to search 165 * @in_len: Length limit from in_ie 166 * @eid: Element ID to match 167 * @oui: OUI to match 168 * @oui_len: OUI length 169 * @ie: If not NULL and the specific IE is found, the IE will be copied to the buf starting from the specific IE 170 * @ielen: If not NULL and the specific IE is found, will set to the length of the entire IE 171 * 172 * Returns: The address of the specific IE found, or NULL 173 */ 174 u8 *rtw_get_ie_ex(u8 *in_ie, uint in_len, u8 eid, u8 *oui, u8 oui_len, u8 *ie, uint *ielen) 175 { 176 uint cnt; 177 u8 *target_ie = NULL; 178 179 if (ielen) 180 *ielen = 0; 181 182 if (!in_ie || in_len <= 0) 183 return target_ie; 184 185 cnt = 0; 186 187 while (cnt < in_len) { 188 if (eid == in_ie[cnt] 189 && (!oui || !memcmp(&in_ie[cnt+2], oui, oui_len))) { 190 target_ie = &in_ie[cnt]; 191 192 if (ie) 193 memcpy(ie, &in_ie[cnt], in_ie[cnt+1]+2); 194 195 if (ielen) 196 *ielen = in_ie[cnt+1]+2; 197 198 break; 199 } 200 cnt += in_ie[cnt+1]+2; /* goto next */ 201 } 202 203 return target_ie; 204 } 205 206 /** 207 * rtw_ies_remove_ie - Find matching IEs and remove 208 * @ies: Address of IEs to search 209 * @ies_len: Pointer of length of ies, will update to new length 210 * @offset: The offset to start search 211 * @eid: Element ID to match 212 * @oui: OUI to match 213 * @oui_len: OUI length 214 * 215 * Returns: _SUCCESS: ies is updated, _FAIL: not updated 216 */ 217 int rtw_ies_remove_ie(u8 *ies, uint *ies_len, uint offset, u8 eid, u8 *oui, u8 oui_len) 218 { 219 int ret = _FAIL; 220 u8 *target_ie; 221 u32 target_ielen; 222 u8 *start; 223 uint search_len; 224 225 if (!ies || !ies_len || *ies_len <= offset) 226 goto exit; 227 228 start = ies + offset; 229 search_len = *ies_len - offset; 230 231 while (1) { 232 target_ie = rtw_get_ie_ex(start, search_len, eid, oui, oui_len, NULL, &target_ielen); 233 if (target_ie && target_ielen) { 234 u8 *remain_ies = target_ie + target_ielen; 235 uint remain_len = search_len - (remain_ies - start); 236 237 memcpy(target_ie, remain_ies, remain_len); 238 *ies_len = *ies_len - target_ielen; 239 ret = _SUCCESS; 240 241 start = target_ie; 242 search_len = remain_len; 243 } else { 244 break; 245 } 246 } 247 exit: 248 return ret; 249 } 250 251 void rtw_set_supported_rate(u8 *supported_rates, uint mode) 252 { 253 memset(supported_rates, 0, NDIS_802_11_LENGTH_RATES_EX); 254 255 switch (mode) { 256 case WIRELESS_11B: 257 memcpy(supported_rates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN); 258 break; 259 260 case WIRELESS_11G: 261 memcpy(supported_rates, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN); 262 break; 263 264 case WIRELESS_11BG: 265 case WIRELESS_11G_24N: 266 case WIRELESS_11_24N: 267 case WIRELESS_11BG_24N: 268 memcpy(supported_rates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN); 269 memcpy(supported_rates + IEEE80211_CCK_RATE_LEN, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN); 270 break; 271 } 272 } 273 274 uint rtw_get_rateset_len(u8 *rateset) 275 { 276 uint i; 277 278 for (i = 0; i < 13; i++) 279 if (rateset[i] == 0) 280 break; 281 return i; 282 } 283 284 int rtw_generate_ie(struct registry_priv *pregistrypriv) 285 { 286 u8 wireless_mode; 287 int sz = 0, rateLen; 288 struct wlan_bssid_ex *pdev_network = &pregistrypriv->dev_network; 289 u8 *ie = pdev_network->ies; 290 291 /* timestamp will be inserted by hardware */ 292 sz += 8; 293 ie += sz; 294 295 /* beacon interval : 2bytes */ 296 *(__le16 *)ie = cpu_to_le16((u16)pdev_network->configuration.beacon_period);/* BCN_INTERVAL; */ 297 sz += 2; 298 ie += 2; 299 300 /* capability info */ 301 *(u16 *)ie = 0; 302 303 *(__le16 *)ie |= cpu_to_le16(WLAN_CAPABILITY_IBSS); 304 305 if (pregistrypriv->preamble == PREAMBLE_SHORT) 306 *(__le16 *)ie |= cpu_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE); 307 308 if (pdev_network->privacy) 309 *(__le16 *)ie |= cpu_to_le16(WLAN_CAPABILITY_PRIVACY); 310 311 sz += 2; 312 ie += 2; 313 314 /* SSID */ 315 ie = rtw_set_ie(ie, WLAN_EID_SSID, pdev_network->ssid.ssid_length, pdev_network->ssid.ssid, &sz); 316 317 /* supported rates */ 318 wireless_mode = pregistrypriv->wireless_mode; 319 320 rtw_set_supported_rate(pdev_network->supported_rates, wireless_mode); 321 322 rateLen = rtw_get_rateset_len(pdev_network->supported_rates); 323 324 if (rateLen > 8) { 325 ie = rtw_set_ie(ie, WLAN_EID_SUPP_RATES, 8, pdev_network->supported_rates, &sz); 326 /* ie = rtw_set_ie(ie, WLAN_EID_EXT_SUPP_RATES, (rateLen - 8), (pdev_network->supported_rates + 8), &sz); */ 327 } else { 328 ie = rtw_set_ie(ie, WLAN_EID_SUPP_RATES, rateLen, pdev_network->supported_rates, &sz); 329 } 330 331 /* DS parameter set */ 332 ie = rtw_set_ie(ie, WLAN_EID_DS_PARAMS, 1, (u8 *)&(pdev_network->configuration.ds_config), &sz); 333 334 /* IBSS Parameter Set */ 335 336 ie = rtw_set_ie(ie, WLAN_EID_IBSS_PARAMS, 2, (u8 *)&(pdev_network->configuration.atim_window), &sz); 337 338 if (rateLen > 8) 339 ie = rtw_set_ie(ie, WLAN_EID_EXT_SUPP_RATES, (rateLen - 8), (pdev_network->supported_rates + 8), &sz); 340 341 /* HT Cap. */ 342 if ((pregistrypriv->wireless_mode & WIRELESS_11_24N) && 343 (pregistrypriv->ht_enable == true)) { 344 /* todo: */ 345 } 346 347 /* pdev_network->ie_length = sz; update ie_length */ 348 349 /* return _SUCCESS; */ 350 351 return sz; 352 } 353 354 unsigned char *rtw_get_wpa_ie(unsigned char *pie, int *wpa_ie_len, int limit) 355 { 356 int len; 357 u16 val16; 358 unsigned char wpa_oui_type[] = {0x00, 0x50, 0xf2, 0x01}; 359 u8 *pbuf = pie; 360 int limit_new = limit; 361 __le16 le_tmp; 362 363 while (1) { 364 pbuf = rtw_get_ie(pbuf, WLAN_EID_VENDOR_SPECIFIC, &len, limit_new); 365 366 if (pbuf) { 367 /* check if oui matches... */ 368 if (memcmp((pbuf + 2), wpa_oui_type, sizeof(wpa_oui_type))) 369 goto check_next_ie; 370 371 /* check version... */ 372 memcpy((u8 *)&le_tmp, (pbuf + 6), sizeof(val16)); 373 374 val16 = le16_to_cpu(le_tmp); 375 if (val16 != 0x0001) 376 goto check_next_ie; 377 378 *wpa_ie_len = *(pbuf + 1); 379 380 return pbuf; 381 382 } else { 383 *wpa_ie_len = 0; 384 return NULL; 385 } 386 387 check_next_ie: 388 389 limit_new = limit - (pbuf - pie) - 2 - len; 390 391 if (limit_new <= 0) 392 break; 393 394 pbuf += (2 + len); 395 } 396 397 *wpa_ie_len = 0; 398 399 return NULL; 400 } 401 402 unsigned char *rtw_get_wpa2_ie(unsigned char *pie, int *rsn_ie_len, int limit) 403 { 404 return rtw_get_ie(pie, WLAN_EID_RSN, rsn_ie_len, limit); 405 } 406 407 int rtw_get_wpa_cipher_suite(u8 *s) 408 { 409 if (!memcmp(s, WPA_CIPHER_SUITE_NONE, WPA_SELECTOR_LEN)) 410 return WPA_CIPHER_NONE; 411 if (!memcmp(s, WPA_CIPHER_SUITE_WEP40, WPA_SELECTOR_LEN)) 412 return WPA_CIPHER_WEP40; 413 if (!memcmp(s, WPA_CIPHER_SUITE_TKIP, WPA_SELECTOR_LEN)) 414 return WPA_CIPHER_TKIP; 415 if (!memcmp(s, WPA_CIPHER_SUITE_CCMP, WPA_SELECTOR_LEN)) 416 return WPA_CIPHER_CCMP; 417 if (!memcmp(s, WPA_CIPHER_SUITE_WEP104, WPA_SELECTOR_LEN)) 418 return WPA_CIPHER_WEP104; 419 420 return 0; 421 } 422 423 int rtw_get_wpa2_cipher_suite(u8 *s) 424 { 425 if (!memcmp(s, RSN_CIPHER_SUITE_NONE, RSN_SELECTOR_LEN)) 426 return WPA_CIPHER_NONE; 427 if (!memcmp(s, RSN_CIPHER_SUITE_WEP40, RSN_SELECTOR_LEN)) 428 return WPA_CIPHER_WEP40; 429 if (!memcmp(s, RSN_CIPHER_SUITE_TKIP, RSN_SELECTOR_LEN)) 430 return WPA_CIPHER_TKIP; 431 if (!memcmp(s, RSN_CIPHER_SUITE_CCMP, RSN_SELECTOR_LEN)) 432 return WPA_CIPHER_CCMP; 433 if (!memcmp(s, RSN_CIPHER_SUITE_WEP104, RSN_SELECTOR_LEN)) 434 return WPA_CIPHER_WEP104; 435 436 return 0; 437 } 438 439 int rtw_parse_wpa_ie(u8 *wpa_ie, int wpa_ie_len, int *group_cipher, int *pairwise_cipher, int *is_8021x) 440 { 441 int i, ret = _SUCCESS; 442 int left, count; 443 u8 *pos; 444 u8 SUITE_1X[4] = {0x00, 0x50, 0xf2, 1}; 445 446 if (wpa_ie_len <= 0) { 447 /* No WPA IE - fail silently */ 448 return _FAIL; 449 } 450 451 if ((*wpa_ie != WLAN_EID_VENDOR_SPECIFIC) || (*(wpa_ie+1) != (u8)(wpa_ie_len - 2)) || 452 (memcmp(wpa_ie+2, RTW_WPA_OUI_TYPE, WPA_SELECTOR_LEN))) { 453 return _FAIL; 454 } 455 456 pos = wpa_ie; 457 458 pos += 8; 459 left = wpa_ie_len - 8; 460 461 /* group_cipher */ 462 if (left >= WPA_SELECTOR_LEN) { 463 *group_cipher = rtw_get_wpa_cipher_suite(pos); 464 465 pos += WPA_SELECTOR_LEN; 466 left -= WPA_SELECTOR_LEN; 467 468 } else if (left > 0) 469 return _FAIL; 470 471 /* pairwise_cipher */ 472 if (left >= 2) { 473 /* count = le16_to_cpu(*(u16*)pos); */ 474 count = get_unaligned_le16(pos); 475 pos += 2; 476 left -= 2; 477 478 if (count == 0 || left < count * WPA_SELECTOR_LEN) 479 return _FAIL; 480 481 for (i = 0; i < count; i++) { 482 *pairwise_cipher |= rtw_get_wpa_cipher_suite(pos); 483 484 pos += WPA_SELECTOR_LEN; 485 left -= WPA_SELECTOR_LEN; 486 } 487 488 } else if (left == 1) 489 return _FAIL; 490 491 if (is_8021x) { 492 if (left >= 6) { 493 pos += 2; 494 if (!memcmp(pos, SUITE_1X, 4)) 495 *is_8021x = 1; 496 } 497 } 498 499 return ret; 500 } 501 502 int rtw_parse_wpa2_ie(u8 *rsn_ie, int rsn_ie_len, int *group_cipher, int *pairwise_cipher, int *is_8021x) 503 { 504 int i, ret = _SUCCESS; 505 int left, count; 506 u8 *pos; 507 u8 SUITE_1X[4] = {0x00, 0x0f, 0xac, 0x01}; 508 509 if (rsn_ie_len <= 0) { 510 /* No RSN IE - fail silently */ 511 return _FAIL; 512 } 513 514 if ((*rsn_ie != WLAN_EID_RSN) || (*(rsn_ie+1) != (u8)(rsn_ie_len - 2))) 515 return _FAIL; 516 517 pos = rsn_ie; 518 pos += 4; 519 left = rsn_ie_len - 4; 520 521 /* group_cipher */ 522 if (left >= RSN_SELECTOR_LEN) { 523 *group_cipher = rtw_get_wpa2_cipher_suite(pos); 524 525 pos += RSN_SELECTOR_LEN; 526 left -= RSN_SELECTOR_LEN; 527 528 } else if (left > 0) 529 return _FAIL; 530 531 /* pairwise_cipher */ 532 if (left >= 2) { 533 /* count = le16_to_cpu(*(u16*)pos); */ 534 count = get_unaligned_le16(pos); 535 pos += 2; 536 left -= 2; 537 538 if (count == 0 || left < count * RSN_SELECTOR_LEN) 539 return _FAIL; 540 541 for (i = 0; i < count; i++) { 542 *pairwise_cipher |= rtw_get_wpa2_cipher_suite(pos); 543 544 pos += RSN_SELECTOR_LEN; 545 left -= RSN_SELECTOR_LEN; 546 } 547 548 } else if (left == 1) 549 return _FAIL; 550 551 if (is_8021x) { 552 if (left >= 6) { 553 pos += 2; 554 if (!memcmp(pos, SUITE_1X, 4)) 555 *is_8021x = 1; 556 } 557 } 558 559 return ret; 560 } 561 562 /* ifdef CONFIG_WAPI_SUPPORT */ 563 int rtw_get_wapi_ie(u8 *in_ie, uint in_len, u8 *wapi_ie, u16 *wapi_len) 564 { 565 int len = 0; 566 u8 authmode; 567 uint cnt; 568 u8 wapi_oui1[4] = {0x0, 0x14, 0x72, 0x01}; 569 u8 wapi_oui2[4] = {0x0, 0x14, 0x72, 0x02}; 570 571 if (wapi_len) 572 *wapi_len = 0; 573 574 if (!in_ie || in_len <= 0) 575 return len; 576 577 cnt = (_TIMESTAMP_ + _BEACON_ITERVAL_ + _CAPABILITY_); 578 579 while (cnt < in_len) { 580 authmode = in_ie[cnt]; 581 582 /* if (authmode == WLAN_EID_BSS_AC_ACCESS_DELAY) */ 583 if (authmode == WLAN_EID_BSS_AC_ACCESS_DELAY && (!memcmp(&in_ie[cnt+6], wapi_oui1, 4) || 584 !memcmp(&in_ie[cnt+6], wapi_oui2, 4))) { 585 if (wapi_ie) 586 memcpy(wapi_ie, &in_ie[cnt], in_ie[cnt+1]+2); 587 588 if (wapi_len) 589 *wapi_len = in_ie[cnt+1]+2; 590 591 cnt += in_ie[cnt+1]+2; /* get next */ 592 } else { 593 cnt += in_ie[cnt+1]+2; /* get next */ 594 } 595 } 596 597 if (wapi_len) 598 len = *wapi_len; 599 600 return len; 601 } 602 /* endif */ 603 604 void rtw_get_sec_ie(u8 *in_ie, uint in_len, u8 *rsn_ie, u16 *rsn_len, u8 *wpa_ie, u16 *wpa_len) 605 { 606 u8 authmode; 607 u8 wpa_oui[4] = {0x0, 0x50, 0xf2, 0x01}; 608 uint cnt; 609 610 /* Search required WPA or WPA2 IE and copy to sec_ie[ ] */ 611 612 cnt = (_TIMESTAMP_ + _BEACON_ITERVAL_ + _CAPABILITY_); 613 614 while (cnt < in_len) { 615 authmode = in_ie[cnt]; 616 617 if ((authmode == WLAN_EID_VENDOR_SPECIFIC) && (!memcmp(&in_ie[cnt+2], &wpa_oui[0], 4))) { 618 if (wpa_ie) 619 memcpy(wpa_ie, &in_ie[cnt], in_ie[cnt+1]+2); 620 621 *wpa_len = in_ie[cnt + 1] + 2; 622 cnt += in_ie[cnt + 1] + 2; /* get next */ 623 } else { 624 if (authmode == WLAN_EID_RSN) { 625 if (rsn_ie) 626 memcpy(rsn_ie, &in_ie[cnt], in_ie[cnt + 1] + 2); 627 628 *rsn_len = in_ie[cnt+1]+2; 629 cnt += in_ie[cnt+1]+2; /* get next */ 630 } else { 631 cnt += in_ie[cnt+1]+2; /* get next */ 632 } 633 } 634 } 635 } 636 637 /** 638 * rtw_get_wps_ie - Search WPS IE from a series of IEs 639 * @in_ie: Address of IEs to search 640 * @in_len: Length limit from in_ie 641 * @wps_ie: If not NULL and WPS IE is found, WPS IE will be copied to the buf starting from wps_ie 642 * @wps_ielen: If not NULL and WPS IE is found, will set to the length of the entire WPS IE 643 * 644 * Returns: The address of the WPS IE found, or NULL 645 */ 646 u8 *rtw_get_wps_ie(u8 *in_ie, uint in_len, u8 *wps_ie, uint *wps_ielen) 647 { 648 uint cnt; 649 u8 *wpsie_ptr = NULL; 650 u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04}; 651 652 if (wps_ielen) 653 *wps_ielen = 0; 654 655 if (!in_ie || in_len <= 0) 656 return wpsie_ptr; 657 658 cnt = 0; 659 660 while (cnt < in_len) { 661 eid = in_ie[cnt]; 662 663 if ((eid == WLAN_EID_VENDOR_SPECIFIC) && (!memcmp(&in_ie[cnt+2], wps_oui, 4))) { 664 wpsie_ptr = &in_ie[cnt]; 665 666 if (wps_ie) 667 memcpy(wps_ie, &in_ie[cnt], in_ie[cnt+1]+2); 668 669 if (wps_ielen) 670 *wps_ielen = in_ie[cnt+1]+2; 671 672 cnt += in_ie[cnt+1]+2; 673 674 break; 675 } 676 cnt += in_ie[cnt+1]+2; /* goto next */ 677 } 678 679 return wpsie_ptr; 680 } 681 682 /** 683 * rtw_get_wps_attr - Search a specific WPS attribute from a given WPS IE 684 * @wps_ie: Address of WPS IE to search 685 * @wps_ielen: Length limit from wps_ie 686 * @target_attr_id: The attribute ID of WPS attribute to search 687 * @buf_attr: If not NULL and the WPS attribute is found, WPS attribute will be copied to the buf starting from buf_attr 688 * @len_attr: If not NULL and the WPS attribute is found, will set to the length of the entire WPS attribute 689 * 690 * Returns: the address of the specific WPS attribute found, or NULL 691 */ 692 u8 *rtw_get_wps_attr(u8 *wps_ie, uint wps_ielen, u16 target_attr_id, u8 *buf_attr, u32 *len_attr) 693 { 694 u8 *attr_ptr = NULL; 695 u8 *target_attr_ptr = NULL; 696 u8 wps_oui[4] = {0x00, 0x50, 0xF2, 0x04}; 697 698 if (len_attr) 699 *len_attr = 0; 700 701 if ((wps_ie[0] != WLAN_EID_VENDOR_SPECIFIC) || 702 (memcmp(wps_ie + 2, wps_oui, 4))) { 703 return attr_ptr; 704 } 705 706 /* 6 = 1(Element ID) + 1(Length) + 4(WPS OUI) */ 707 attr_ptr = wps_ie + 6; /* goto first attr */ 708 709 while (attr_ptr - wps_ie < wps_ielen) { 710 /* 4 = 2(Attribute ID) + 2(Length) */ 711 u16 attr_id = get_unaligned_be16(attr_ptr); 712 u16 attr_data_len = get_unaligned_be16(attr_ptr + 2); 713 u16 attr_len = attr_data_len + 4; 714 715 if (attr_id == target_attr_id) { 716 target_attr_ptr = attr_ptr; 717 718 if (buf_attr) 719 memcpy(buf_attr, attr_ptr, attr_len); 720 721 if (len_attr) 722 *len_attr = attr_len; 723 724 break; 725 } 726 attr_ptr += attr_len; /* goto next */ 727 } 728 729 return target_attr_ptr; 730 } 731 732 /** 733 * rtw_get_wps_attr_content - Search a specific WPS attribute content from a given WPS IE 734 * @wps_ie: Address of WPS IE to search 735 * @wps_ielen: Length limit from wps_ie 736 * @target_attr_id: The attribute ID of WPS attribute to search 737 * @buf_content: If not NULL and the WPS attribute is found, WPS attribute content will be copied to the buf starting from buf_content 738 * @len_content: If not NULL and the WPS attribute is found, will set to the length of the WPS attribute content 739 * 740 * Returns: the address of the specific WPS attribute content found, or NULL 741 */ 742 u8 *rtw_get_wps_attr_content(u8 *wps_ie, uint wps_ielen, u16 target_attr_id, u8 *buf_content, uint *len_content) 743 { 744 u8 *attr_ptr; 745 u32 attr_len; 746 747 if (len_content) 748 *len_content = 0; 749 750 attr_ptr = rtw_get_wps_attr(wps_ie, wps_ielen, target_attr_id, NULL, &attr_len); 751 752 if (attr_ptr && attr_len) { 753 if (buf_content) 754 memcpy(buf_content, attr_ptr+4, attr_len-4); 755 756 if (len_content) 757 *len_content = attr_len-4; 758 759 return attr_ptr+4; 760 } 761 762 return NULL; 763 } 764 765 static int rtw_ieee802_11_parse_vendor_specific(u8 *pos, uint elen, 766 struct rtw_ieee802_11_elems *elems, 767 int show_errors) 768 { 769 unsigned int oui; 770 771 /* first 3 bytes in vendor specific information element are the IEEE 772 * OUI of the vendor. The following byte is used a vendor specific 773 * sub-type. */ 774 if (elen < 4) 775 return -1; 776 777 oui = get_unaligned_be24(pos); 778 switch (oui) { 779 case OUI_MICROSOFT: 780 /* Microsoft/Wi-Fi information elements are further typed and 781 * subtyped */ 782 switch (pos[3]) { 783 case 1: 784 /* Microsoft OUI (00:50:F2) with OUI Type 1: 785 * real WPA information element */ 786 elems->wpa_ie = pos; 787 elems->wpa_ie_len = elen; 788 break; 789 case WME_OUI_TYPE: /* this is a Wi-Fi WME info. element */ 790 if (elen < 5) 791 return -1; 792 793 switch (pos[4]) { 794 case WME_OUI_SUBTYPE_INFORMATION_ELEMENT: 795 case WME_OUI_SUBTYPE_PARAMETER_ELEMENT: 796 elems->wme = pos; 797 elems->wme_len = elen; 798 break; 799 case WME_OUI_SUBTYPE_TSPEC_ELEMENT: 800 elems->wme_tspec = pos; 801 elems->wme_tspec_len = elen; 802 break; 803 default: 804 return -1; 805 } 806 break; 807 case 4: 808 /* Wi-Fi Protected Setup (WPS) IE */ 809 elems->wps_ie = pos; 810 elems->wps_ie_len = elen; 811 break; 812 default: 813 return -1; 814 } 815 break; 816 817 case OUI_BROADCOM: 818 switch (pos[3]) { 819 case VENDOR_HT_CAPAB_OUI_TYPE: 820 elems->vendor_ht_cap = pos; 821 elems->vendor_ht_cap_len = elen; 822 break; 823 default: 824 return -1; 825 } 826 break; 827 828 default: 829 return -1; 830 } 831 832 return 0; 833 } 834 835 /** 836 * rtw_ieee802_11_parse_elems - Parse information elements in management frames 837 * @start: Pointer to the start of IEs 838 * @len: Length of IE buffer in octets 839 * @elems: Data structure for parsed elements 840 * @show_errors: Whether to show parsing errors in debug log 841 * Returns: Parsing result 842 */ 843 enum ParseRes rtw_ieee802_11_parse_elems(u8 *start, uint len, 844 struct rtw_ieee802_11_elems *elems, 845 int show_errors) 846 { 847 uint left = len; 848 u8 *pos = start; 849 int unknown = 0; 850 851 memset(elems, 0, sizeof(*elems)); 852 853 while (left >= 2) { 854 u8 id, elen; 855 856 id = *pos++; 857 elen = *pos++; 858 left -= 2; 859 860 if (elen > left) 861 return ParseFailed; 862 863 switch (id) { 864 case WLAN_EID_SSID: 865 elems->ssid = pos; 866 elems->ssid_len = elen; 867 break; 868 case WLAN_EID_SUPP_RATES: 869 elems->supp_rates = pos; 870 elems->supp_rates_len = elen; 871 break; 872 case WLAN_EID_FH_PARAMS: 873 elems->fh_params = pos; 874 elems->fh_params_len = elen; 875 break; 876 case WLAN_EID_DS_PARAMS: 877 elems->ds_params = pos; 878 elems->ds_params_len = elen; 879 break; 880 case WLAN_EID_CF_PARAMS: 881 elems->cf_params = pos; 882 elems->cf_params_len = elen; 883 break; 884 case WLAN_EID_TIM: 885 elems->tim = pos; 886 elems->tim_len = elen; 887 break; 888 case WLAN_EID_IBSS_PARAMS: 889 elems->ibss_params = pos; 890 elems->ibss_params_len = elen; 891 break; 892 case WLAN_EID_CHALLENGE: 893 elems->challenge = pos; 894 elems->challenge_len = elen; 895 break; 896 case WLAN_EID_ERP_INFO: 897 elems->erp_info = pos; 898 elems->erp_info_len = elen; 899 break; 900 case WLAN_EID_EXT_SUPP_RATES: 901 elems->ext_supp_rates = pos; 902 elems->ext_supp_rates_len = elen; 903 break; 904 case WLAN_EID_VENDOR_SPECIFIC: 905 if (rtw_ieee802_11_parse_vendor_specific(pos, elen, 906 elems, 907 show_errors)) 908 unknown++; 909 break; 910 case WLAN_EID_RSN: 911 elems->rsn_ie = pos; 912 elems->rsn_ie_len = elen; 913 break; 914 case WLAN_EID_PWR_CAPABILITY: 915 elems->power_cap = pos; 916 elems->power_cap_len = elen; 917 break; 918 case WLAN_EID_SUPPORTED_CHANNELS: 919 elems->supp_channels = pos; 920 elems->supp_channels_len = elen; 921 break; 922 case WLAN_EID_MOBILITY_DOMAIN: 923 elems->mdie = pos; 924 elems->mdie_len = elen; 925 break; 926 case WLAN_EID_FAST_BSS_TRANSITION: 927 elems->ftie = pos; 928 elems->ftie_len = elen; 929 break; 930 case WLAN_EID_TIMEOUT_INTERVAL: 931 elems->timeout_int = pos; 932 elems->timeout_int_len = elen; 933 break; 934 case WLAN_EID_HT_CAPABILITY: 935 elems->ht_capabilities = pos; 936 elems->ht_capabilities_len = elen; 937 break; 938 case WLAN_EID_HT_OPERATION: 939 elems->ht_operation = pos; 940 elems->ht_operation_len = elen; 941 break; 942 case WLAN_EID_VHT_CAPABILITY: 943 elems->vht_capabilities = pos; 944 elems->vht_capabilities_len = elen; 945 break; 946 case WLAN_EID_VHT_OPERATION: 947 elems->vht_operation = pos; 948 elems->vht_operation_len = elen; 949 break; 950 case WLAN_EID_OPMODE_NOTIF: 951 elems->vht_op_mode_notify = pos; 952 elems->vht_op_mode_notify_len = elen; 953 break; 954 default: 955 unknown++; 956 break; 957 } 958 959 left -= elen; 960 pos += elen; 961 } 962 963 if (left) 964 return ParseFailed; 965 966 return unknown ? ParseUnknown : ParseOK; 967 } 968 969 void rtw_macaddr_cfg(struct device *dev, u8 *mac_addr) 970 { 971 u8 mac[ETH_ALEN]; 972 struct device_node *np = dev->of_node; 973 const unsigned char *addr; 974 int len; 975 976 if (!mac_addr) 977 return; 978 979 if (rtw_initmac && mac_pton(rtw_initmac, mac)) { 980 /* Users specify the mac address */ 981 ether_addr_copy(mac_addr, mac); 982 } else { 983 /* Use the mac address stored in the Efuse */ 984 ether_addr_copy(mac, mac_addr); 985 } 986 987 if (is_broadcast_ether_addr(mac) || is_zero_ether_addr(mac)) { 988 addr = of_get_property(np, "local-mac-address", &len); 989 990 if (addr && len == ETH_ALEN) { 991 ether_addr_copy(mac_addr, addr); 992 } else { 993 eth_random_addr(mac_addr); 994 } 995 } 996 } 997 998 static int rtw_get_cipher_info(struct wlan_network *pnetwork) 999 { 1000 u32 wpa_ielen; 1001 unsigned char *pbuf; 1002 int group_cipher = 0, pairwise_cipher = 0, is8021x = 0; 1003 int ret = _FAIL; 1004 1005 pbuf = rtw_get_wpa_ie(&pnetwork->network.ies[12], &wpa_ielen, pnetwork->network.ie_length-12); 1006 1007 if (pbuf && (wpa_ielen > 0)) { 1008 if (_SUCCESS == rtw_parse_wpa_ie(pbuf, wpa_ielen+2, &group_cipher, &pairwise_cipher, &is8021x)) { 1009 pnetwork->bcn_info.pairwise_cipher = pairwise_cipher; 1010 pnetwork->bcn_info.group_cipher = group_cipher; 1011 pnetwork->bcn_info.is_8021x = is8021x; 1012 ret = _SUCCESS; 1013 } 1014 } else { 1015 pbuf = rtw_get_wpa2_ie(&pnetwork->network.ies[12], &wpa_ielen, pnetwork->network.ie_length-12); 1016 1017 if (pbuf && (wpa_ielen > 0)) { 1018 if (_SUCCESS == rtw_parse_wpa2_ie(pbuf, wpa_ielen+2, &group_cipher, &pairwise_cipher, &is8021x)) { 1019 pnetwork->bcn_info.pairwise_cipher = pairwise_cipher; 1020 pnetwork->bcn_info.group_cipher = group_cipher; 1021 pnetwork->bcn_info.is_8021x = is8021x; 1022 ret = _SUCCESS; 1023 } 1024 } 1025 } 1026 1027 return ret; 1028 } 1029 1030 void rtw_get_bcn_info(struct wlan_network *pnetwork) 1031 { 1032 unsigned short cap = 0; 1033 u8 bencrypt = 0; 1034 /* u8 wpa_ie[255], rsn_ie[255]; */ 1035 u16 wpa_len = 0, rsn_len = 0; 1036 struct HT_info_element *pht_info = NULL; 1037 struct ieee80211_ht_cap *pht_cap = NULL; 1038 unsigned int len; 1039 unsigned char *p; 1040 __le16 le_cap; 1041 1042 memcpy((u8 *)&le_cap, rtw_get_capability_from_ie(pnetwork->network.ies), 2); 1043 cap = le16_to_cpu(le_cap); 1044 if (cap & WLAN_CAPABILITY_PRIVACY) { 1045 bencrypt = 1; 1046 pnetwork->network.privacy = 1; 1047 } else { 1048 pnetwork->bcn_info.encryp_protocol = ENCRYP_PROTOCOL_OPENSYS; 1049 } 1050 rtw_get_sec_ie(pnetwork->network.ies, pnetwork->network.ie_length, NULL, &rsn_len, NULL, &wpa_len); 1051 1052 if (rsn_len > 0) { 1053 pnetwork->bcn_info.encryp_protocol = ENCRYP_PROTOCOL_WPA2; 1054 } else if (wpa_len > 0) { 1055 pnetwork->bcn_info.encryp_protocol = ENCRYP_PROTOCOL_WPA; 1056 } else { 1057 if (bencrypt) 1058 pnetwork->bcn_info.encryp_protocol = ENCRYP_PROTOCOL_WEP; 1059 } 1060 rtw_get_cipher_info(pnetwork); 1061 1062 /* get bwmode and ch_offset */ 1063 /* parsing HT_CAP_IE */ 1064 p = rtw_get_ie(pnetwork->network.ies + _FIXED_IE_LENGTH_, WLAN_EID_HT_CAPABILITY, &len, pnetwork->network.ie_length - _FIXED_IE_LENGTH_); 1065 if (p && len > 0) { 1066 pht_cap = (struct ieee80211_ht_cap *)(p + 2); 1067 pnetwork->bcn_info.ht_cap_info = le16_to_cpu(pht_cap->cap_info); 1068 } else { 1069 pnetwork->bcn_info.ht_cap_info = 0; 1070 } 1071 /* parsing HT_INFO_IE */ 1072 p = rtw_get_ie(pnetwork->network.ies + _FIXED_IE_LENGTH_, WLAN_EID_HT_OPERATION, &len, pnetwork->network.ie_length - _FIXED_IE_LENGTH_); 1073 if (p && len > 0) { 1074 pht_info = (struct HT_info_element *)(p + 2); 1075 pnetwork->bcn_info.ht_info_infos_0 = pht_info->infos[0]; 1076 } else { 1077 pnetwork->bcn_info.ht_info_infos_0 = 0; 1078 } 1079 } 1080 1081 /* show MCS rate, unit: 100Kbps */ 1082 u16 rtw_mcs_rate(u8 bw_40MHz, u8 short_GI, unsigned char *MCS_rate) 1083 { 1084 u16 max_rate = 0; 1085 1086 if (MCS_rate[0] & BIT(7)) 1087 max_rate = (bw_40MHz) ? ((short_GI)?1500:1350):((short_GI)?722:650); 1088 else if (MCS_rate[0] & BIT(6)) 1089 max_rate = (bw_40MHz) ? ((short_GI)?1350:1215):((short_GI)?650:585); 1090 else if (MCS_rate[0] & BIT(5)) 1091 max_rate = (bw_40MHz) ? ((short_GI)?1200:1080):((short_GI)?578:520); 1092 else if (MCS_rate[0] & BIT(4)) 1093 max_rate = (bw_40MHz) ? ((short_GI)?900:810):((short_GI)?433:390); 1094 else if (MCS_rate[0] & BIT(3)) 1095 max_rate = (bw_40MHz) ? ((short_GI)?600:540):((short_GI)?289:260); 1096 else if (MCS_rate[0] & BIT(2)) 1097 max_rate = (bw_40MHz) ? ((short_GI)?450:405):((short_GI)?217:195); 1098 else if (MCS_rate[0] & BIT(1)) 1099 max_rate = (bw_40MHz) ? ((short_GI)?300:270):((short_GI)?144:130); 1100 else if (MCS_rate[0] & BIT(0)) 1101 max_rate = (bw_40MHz) ? ((short_GI)?150:135):((short_GI)?72:65); 1102 1103 return max_rate; 1104 } 1105 1106 int rtw_action_frame_parse(const u8 *frame, u32 frame_len, u8 *category, u8 *action) 1107 { 1108 const u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr); 1109 u16 fc; 1110 u8 c; 1111 u8 a = ACT_PUBLIC_MAX; 1112 1113 fc = le16_to_cpu(((struct ieee80211_hdr_3addr *)frame)->frame_control); 1114 1115 if ((fc & (IEEE80211_FCTL_FTYPE|IEEE80211_FCTL_STYPE)) 1116 != (IEEE80211_FTYPE_MGMT|IEEE80211_STYPE_ACTION) 1117 ) { 1118 return false; 1119 } 1120 1121 c = frame_body[0]; 1122 1123 switch (c) { 1124 case RTW_WLAN_CATEGORY_P2P: /* vendor-specific */ 1125 break; 1126 default: 1127 a = frame_body[1]; 1128 } 1129 1130 if (category) 1131 *category = c; 1132 if (action) 1133 *action = a; 1134 1135 return true; 1136 } 1137 1138 static const char *_action_public_str[] = { 1139 "ACT_PUB_BSSCOEXIST", 1140 "ACT_PUB_DSE_ENABLE", 1141 "ACT_PUB_DSE_DEENABLE", 1142 "ACT_PUB_DSE_REG_LOCATION", 1143 "ACT_PUB_EXT_CHL_SWITCH", 1144 "ACT_PUB_DSE_MSR_REQ", 1145 "ACT_PUB_DSE_MSR_RPRT", 1146 "ACT_PUB_MP", 1147 "ACT_PUB_DSE_PWR_CONSTRAINT", 1148 "ACT_PUB_VENDOR", 1149 "ACT_PUB_GAS_INITIAL_REQ", 1150 "ACT_PUB_GAS_INITIAL_RSP", 1151 "ACT_PUB_GAS_COMEBACK_REQ", 1152 "ACT_PUB_GAS_COMEBACK_RSP", 1153 "ACT_PUB_TDLS_DISCOVERY_RSP", 1154 "ACT_PUB_LOCATION_TRACK", 1155 "ACT_PUB_RSVD", 1156 }; 1157 1158 const char *action_public_str(u8 action) 1159 { 1160 action = (action >= ACT_PUBLIC_MAX) ? ACT_PUBLIC_MAX : action; 1161 return _action_public_str[action]; 1162 } 1163