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