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
rtw_get_bit_value_from_ieee_value(u8 val)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
rtw_is_cckrates_included(u8 * rate)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
rtw_is_cckratesonly_included(u8 * rate)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
rtw_check_network_type(unsigned char * rate,int ratelen,int channel)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
rtw_set_fixed_ie(unsigned char * pbuf,unsigned int len,unsigned char * source,unsigned int * frlen)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 */
rtw_set_ie(u8 * pbuf,signed int index,uint len,u8 * source,uint * frlen)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 -----------------------------------------------------------------------------*/
rtw_get_ie(u8 * pbuf,signed int index,signed int * len,signed int limit)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 */
rtw_get_ie_ex(u8 * in_ie,uint in_len,u8 eid,u8 * oui,u8 oui_len,u8 * ie,uint * ielen)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 */
rtw_ies_remove_ie(u8 * ies,uint * ies_len,uint offset,u8 eid,u8 * oui,u8 oui_len)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
rtw_set_supported_rate(u8 * supported_rates,uint mode)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
rtw_get_rateset_len(u8 * rateset)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
rtw_generate_ie(struct registry_priv * pregistrypriv)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
rtw_get_wpa_ie(unsigned char * pie,int * wpa_ie_len,int limit)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
rtw_get_wpa2_ie(unsigned char * pie,int * rsn_ie_len,int limit)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
rtw_get_wpa_cipher_suite(u8 * s)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
rtw_get_wpa2_cipher_suite(u8 * s)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
rtw_parse_wpa_ie(u8 * wpa_ie,int wpa_ie_len,int * group_cipher,int * pairwise_cipher,int * is_8021x)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
rtw_parse_wpa2_ie(u8 * rsn_ie,int rsn_ie_len,int * group_cipher,int * pairwise_cipher,int * is_8021x)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 */
rtw_get_wapi_ie(u8 * in_ie,uint in_len,u8 * wapi_ie,u16 * wapi_len)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
rtw_get_sec_ie(u8 * in_ie,uint in_len,u8 * rsn_ie,u16 * rsn_len,u8 * wpa_ie,u16 * wpa_len)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 */
rtw_get_wps_ie(u8 * in_ie,uint in_len,u8 * wps_ie,uint * wps_ielen)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 */
rtw_get_wps_attr(u8 * wps_ie,uint wps_ielen,u16 target_attr_id,u8 * buf_attr,u32 * len_attr)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 */
rtw_get_wps_attr_content(u8 * wps_ie,uint wps_ielen,u16 target_attr_id,u8 * buf_content,uint * len_content)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
rtw_ieee802_11_parse_vendor_specific(u8 * pos,uint elen,struct rtw_ieee802_11_elems * elems,int show_errors)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 */
rtw_ieee802_11_parse_elems(u8 * start,uint len,struct rtw_ieee802_11_elems * elems,int show_errors)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
rtw_macaddr_cfg(struct device * dev,u8 * mac_addr)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
rtw_get_cipher_info(struct wlan_network * pnetwork)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
rtw_get_bcn_info(struct wlan_network * pnetwork)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 */
rtw_mcs_rate(u8 bw_40MHz,u8 short_GI,unsigned char * MCS_rate)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
rtw_action_frame_parse(const u8 * frame,u32 frame_len,u8 * category,u8 * action)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
action_public_str(u8 action)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