1 /*
2 * NXP Wireless LAN device driver: management IE handling- setting and
3 * deleting IE.
4 *
5 * Copyright 2011-2020 NXP
6 *
7 * This software file (the "File") is distributed by NXP
8 * under the terms of the GNU General Public License Version 2, June 1991
9 * (the "License"). You may use, redistribute and/or modify this File in
10 * accordance with the terms and conditions of the License, a copy of which
11 * is available by writing to the Free Software Foundation, Inc.,
12 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
13 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
14 *
15 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
17 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
18 * this warranty disclaimer.
19 */
20
21 #include "main.h"
22
23 /* This function checks if current IE index is used by any on other interface.
24 * Return: -1: yes, current IE index is used by someone else.
25 * 0: no, current IE index is NOT used by other interface.
26 */
27 static int
mwifiex_ie_index_used_by_other_intf(struct mwifiex_private * priv,u16 idx)28 mwifiex_ie_index_used_by_other_intf(struct mwifiex_private *priv, u16 idx)
29 {
30 int i;
31 struct mwifiex_adapter *adapter = priv->adapter;
32 struct mwifiex_ie *ie;
33
34 for (i = 0; i < adapter->priv_num; i++) {
35 if (adapter->priv[i] != priv) {
36 ie = &adapter->priv[i]->mgmt_ie[idx];
37 if (ie->mgmt_subtype_mask && ie->ie_length)
38 return -1;
39 }
40 }
41
42 return 0;
43 }
44
45 /* Get unused IE index. This index will be used for setting new IE */
46 static int
mwifiex_ie_get_autoidx(struct mwifiex_private * priv,u16 subtype_mask,struct mwifiex_ie * ie,u16 * index)47 mwifiex_ie_get_autoidx(struct mwifiex_private *priv, u16 subtype_mask,
48 struct mwifiex_ie *ie, u16 *index)
49 {
50 u16 mask, len, i;
51
52 for (i = 0; i < priv->adapter->max_mgmt_ie_index; i++) {
53 mask = le16_to_cpu(priv->mgmt_ie[i].mgmt_subtype_mask);
54 len = le16_to_cpu(ie->ie_length);
55
56 if (mask == MWIFIEX_AUTO_IDX_MASK)
57 continue;
58
59 if (mask == subtype_mask) {
60 if (len > IEEE_MAX_IE_SIZE)
61 continue;
62
63 *index = i;
64 return 0;
65 }
66
67 if (!priv->mgmt_ie[i].ie_length) {
68 if (mwifiex_ie_index_used_by_other_intf(priv, i))
69 continue;
70
71 *index = i;
72 return 0;
73 }
74 }
75
76 return -1;
77 }
78
79 /* This function prepares IE data buffer for command to be sent to FW */
80 static int
mwifiex_update_autoindex_ies(struct mwifiex_private * priv,struct mwifiex_ie_list * ie_list)81 mwifiex_update_autoindex_ies(struct mwifiex_private *priv,
82 struct mwifiex_ie_list *ie_list)
83 {
84 u16 travel_len, index, mask;
85 s16 input_len, tlv_len;
86 struct mwifiex_ie *ie;
87 u8 *tmp;
88
89 input_len = le16_to_cpu(ie_list->len);
90 travel_len = sizeof(struct mwifiex_ie_types_header);
91
92 ie_list->len = 0;
93
94 while (input_len >= sizeof(struct mwifiex_ie_types_header)) {
95 ie = (struct mwifiex_ie *)(((u8 *)ie_list) + travel_len);
96 tlv_len = le16_to_cpu(ie->ie_length);
97 travel_len += tlv_len + MWIFIEX_IE_HDR_SIZE;
98
99 if (input_len < tlv_len + MWIFIEX_IE_HDR_SIZE)
100 return -1;
101 index = le16_to_cpu(ie->ie_index);
102 mask = le16_to_cpu(ie->mgmt_subtype_mask);
103
104 if (index == MWIFIEX_AUTO_IDX_MASK) {
105 /* automatic addition */
106 if (mwifiex_ie_get_autoidx(priv, mask, ie, &index))
107 return -1;
108 if (index == MWIFIEX_AUTO_IDX_MASK)
109 return -1;
110
111 tmp = (u8 *)&priv->mgmt_ie[index].ie_buffer;
112 memcpy(tmp, &ie->ie_buffer, le16_to_cpu(ie->ie_length));
113 priv->mgmt_ie[index].ie_length = ie->ie_length;
114 priv->mgmt_ie[index].ie_index = cpu_to_le16(index);
115 priv->mgmt_ie[index].mgmt_subtype_mask =
116 cpu_to_le16(mask);
117
118 ie->ie_index = cpu_to_le16(index);
119 } else {
120 if (mask != MWIFIEX_DELETE_MASK)
121 return -1;
122 /*
123 * Check if this index is being used on any
124 * other interface.
125 */
126 if (mwifiex_ie_index_used_by_other_intf(priv, index))
127 return -1;
128
129 ie->ie_length = 0;
130 memcpy(&priv->mgmt_ie[index], ie,
131 sizeof(struct mwifiex_ie));
132 }
133
134 le16_unaligned_add_cpu(&ie_list->len,
135 le16_to_cpu(
136 priv->mgmt_ie[index].ie_length) +
137 MWIFIEX_IE_HDR_SIZE);
138 input_len -= tlv_len + MWIFIEX_IE_HDR_SIZE;
139 }
140
141 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP)
142 return mwifiex_send_cmd(priv, HostCmd_CMD_UAP_SYS_CONFIG,
143 HostCmd_ACT_GEN_SET,
144 UAP_CUSTOM_IE_I, ie_list, true);
145
146 return 0;
147 }
148
149 /* Copy individual custom IEs for beacon, probe response and assoc response
150 * and prepare single structure for IE setting.
151 * This function also updates allocated IE indices from driver.
152 */
153 static int
mwifiex_update_uap_custom_ie(struct mwifiex_private * priv,struct mwifiex_ie * beacon_ie,u16 * beacon_idx,struct mwifiex_ie * pr_ie,u16 * probe_idx,struct mwifiex_ie * ar_ie,u16 * assoc_idx)154 mwifiex_update_uap_custom_ie(struct mwifiex_private *priv,
155 struct mwifiex_ie *beacon_ie, u16 *beacon_idx,
156 struct mwifiex_ie *pr_ie, u16 *probe_idx,
157 struct mwifiex_ie *ar_ie, u16 *assoc_idx)
158 {
159 struct mwifiex_ie_list *ap_custom_ie;
160 u8 *pos;
161 u16 len;
162 int ret;
163
164 ap_custom_ie = kzalloc(sizeof(*ap_custom_ie), GFP_KERNEL);
165 if (!ap_custom_ie)
166 return -ENOMEM;
167
168 ap_custom_ie->type = cpu_to_le16(TLV_TYPE_MGMT_IE);
169 pos = (u8 *)ap_custom_ie->ie_list;
170
171 if (beacon_ie) {
172 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
173 le16_to_cpu(beacon_ie->ie_length);
174 memcpy(pos, beacon_ie, len);
175 pos += len;
176 le16_unaligned_add_cpu(&ap_custom_ie->len, len);
177 }
178 if (pr_ie) {
179 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
180 le16_to_cpu(pr_ie->ie_length);
181 memcpy(pos, pr_ie, len);
182 pos += len;
183 le16_unaligned_add_cpu(&ap_custom_ie->len, len);
184 }
185 if (ar_ie) {
186 len = sizeof(struct mwifiex_ie) - IEEE_MAX_IE_SIZE +
187 le16_to_cpu(ar_ie->ie_length);
188 memcpy(pos, ar_ie, len);
189 pos += len;
190 le16_unaligned_add_cpu(&ap_custom_ie->len, len);
191 }
192
193 ret = mwifiex_update_autoindex_ies(priv, ap_custom_ie);
194
195 pos = (u8 *)(&ap_custom_ie->ie_list[0].ie_index);
196 if (beacon_ie && *beacon_idx == MWIFIEX_AUTO_IDX_MASK) {
197 /* save beacon ie index after auto-indexing */
198 *beacon_idx = le16_to_cpu(ap_custom_ie->ie_list[0].ie_index);
199 len = sizeof(*beacon_ie) - IEEE_MAX_IE_SIZE +
200 le16_to_cpu(beacon_ie->ie_length);
201 pos += len;
202 }
203 if (pr_ie && le16_to_cpu(pr_ie->ie_index) == MWIFIEX_AUTO_IDX_MASK) {
204 /* save probe resp ie index after auto-indexing */
205 *probe_idx = *((u16 *)pos);
206 len = sizeof(*pr_ie) - IEEE_MAX_IE_SIZE +
207 le16_to_cpu(pr_ie->ie_length);
208 pos += len;
209 }
210 if (ar_ie && le16_to_cpu(ar_ie->ie_index) == MWIFIEX_AUTO_IDX_MASK)
211 /* save assoc resp ie index after auto-indexing */
212 *assoc_idx = *((u16 *)pos);
213
214 kfree(ap_custom_ie);
215 return ret;
216 }
217
218 /* This function checks if the vendor specified IE is present in passed buffer
219 * and copies it to mwifiex_ie structure.
220 * Function takes pointer to struct mwifiex_ie pointer as argument.
221 * If the vendor specified IE is present then memory is allocated for
222 * mwifiex_ie pointer and filled in with IE. Caller should take care of freeing
223 * this memory.
224 */
mwifiex_update_vs_ie(const u8 * ies,int ies_len,struct mwifiex_ie ** ie_ptr,u16 mask,unsigned int oui,u8 oui_type)225 static int mwifiex_update_vs_ie(const u8 *ies, int ies_len,
226 struct mwifiex_ie **ie_ptr, u16 mask,
227 unsigned int oui, u8 oui_type)
228 {
229 struct ieee_types_header *vs_ie;
230 struct mwifiex_ie *ie = *ie_ptr;
231 const u8 *vendor_ie;
232
233 vendor_ie = cfg80211_find_vendor_ie(oui, oui_type, ies, ies_len);
234 if (vendor_ie) {
235 if (!*ie_ptr) {
236 *ie_ptr = kzalloc(sizeof(struct mwifiex_ie),
237 GFP_KERNEL);
238 if (!*ie_ptr)
239 return -ENOMEM;
240 ie = *ie_ptr;
241 }
242
243 vs_ie = (struct ieee_types_header *)vendor_ie;
244 if (le16_to_cpu(ie->ie_length) + vs_ie->len + 2 >
245 IEEE_MAX_IE_SIZE)
246 return -EINVAL;
247 memcpy(ie->ie_buffer + le16_to_cpu(ie->ie_length),
248 vs_ie, vs_ie->len + 2);
249 le16_unaligned_add_cpu(&ie->ie_length, vs_ie->len + 2);
250 ie->mgmt_subtype_mask = cpu_to_le16(mask);
251 ie->ie_index = cpu_to_le16(MWIFIEX_AUTO_IDX_MASK);
252 }
253
254 *ie_ptr = ie;
255 return 0;
256 }
257
258 /* This function parses beacon IEs, probe response IEs, association response IEs
259 * from cfg80211_ap_settings->beacon and sets these IE to FW.
260 */
mwifiex_set_mgmt_beacon_data_ies(struct mwifiex_private * priv,struct cfg80211_beacon_data * data)261 static int mwifiex_set_mgmt_beacon_data_ies(struct mwifiex_private *priv,
262 struct cfg80211_beacon_data *data)
263 {
264 struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL, *ar_ie = NULL;
265 u16 beacon_idx = MWIFIEX_AUTO_IDX_MASK, pr_idx = MWIFIEX_AUTO_IDX_MASK;
266 u16 ar_idx = MWIFIEX_AUTO_IDX_MASK;
267 int ret = 0;
268
269 if (data->beacon_ies && data->beacon_ies_len) {
270 mwifiex_update_vs_ie(data->beacon_ies, data->beacon_ies_len,
271 &beacon_ie, MGMT_MASK_BEACON,
272 WLAN_OUI_MICROSOFT,
273 WLAN_OUI_TYPE_MICROSOFT_WPS);
274 mwifiex_update_vs_ie(data->beacon_ies, data->beacon_ies_len,
275 &beacon_ie, MGMT_MASK_BEACON,
276 WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P);
277 }
278
279 if (data->proberesp_ies && data->proberesp_ies_len) {
280 mwifiex_update_vs_ie(data->proberesp_ies,
281 data->proberesp_ies_len, &pr_ie,
282 MGMT_MASK_PROBE_RESP, WLAN_OUI_MICROSOFT,
283 WLAN_OUI_TYPE_MICROSOFT_WPS);
284 mwifiex_update_vs_ie(data->proberesp_ies,
285 data->proberesp_ies_len, &pr_ie,
286 MGMT_MASK_PROBE_RESP,
287 WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P);
288 }
289
290 if (data->assocresp_ies && data->assocresp_ies_len) {
291 mwifiex_update_vs_ie(data->assocresp_ies,
292 data->assocresp_ies_len, &ar_ie,
293 MGMT_MASK_ASSOC_RESP |
294 MGMT_MASK_REASSOC_RESP,
295 WLAN_OUI_MICROSOFT,
296 WLAN_OUI_TYPE_MICROSOFT_WPS);
297 mwifiex_update_vs_ie(data->assocresp_ies,
298 data->assocresp_ies_len, &ar_ie,
299 MGMT_MASK_ASSOC_RESP |
300 MGMT_MASK_REASSOC_RESP, WLAN_OUI_WFA,
301 WLAN_OUI_TYPE_WFA_P2P);
302 }
303
304 if (beacon_ie || pr_ie || ar_ie) {
305 ret = mwifiex_update_uap_custom_ie(priv, beacon_ie,
306 &beacon_idx, pr_ie,
307 &pr_idx, ar_ie, &ar_idx);
308 if (ret)
309 goto done;
310 }
311
312 priv->beacon_idx = beacon_idx;
313 priv->proberesp_idx = pr_idx;
314 priv->assocresp_idx = ar_idx;
315
316 done:
317 kfree(beacon_ie);
318 kfree(pr_ie);
319 kfree(ar_ie);
320
321 return ret;
322 }
323
324 /* This function parses head and tail IEs, from cfg80211_beacon_data and sets
325 * these IE to FW.
326 */
mwifiex_uap_parse_tail_ies(struct mwifiex_private * priv,struct cfg80211_beacon_data * info)327 static int mwifiex_uap_parse_tail_ies(struct mwifiex_private *priv,
328 struct cfg80211_beacon_data *info)
329 {
330 struct mwifiex_ie *gen_ie;
331 struct ieee_types_header *hdr;
332 struct ieee80211_vendor_ie *vendorhdr;
333 u16 gen_idx = MWIFIEX_AUTO_IDX_MASK, ie_len = 0;
334 int left_len, parsed_len = 0;
335 unsigned int token_len;
336 int err = 0;
337
338 if (!info->tail || !info->tail_len)
339 return 0;
340
341 gen_ie = kzalloc(sizeof(*gen_ie), GFP_KERNEL);
342 if (!gen_ie)
343 return -ENOMEM;
344
345 left_len = info->tail_len;
346
347 /* Many IEs are generated in FW by parsing bss configuration.
348 * Let's not add them here; else we may end up duplicating these IEs
349 */
350 while (left_len > sizeof(struct ieee_types_header)) {
351 hdr = (void *)(info->tail + parsed_len);
352 token_len = hdr->len + sizeof(struct ieee_types_header);
353 if (token_len > left_len) {
354 err = -EINVAL;
355 goto out;
356 }
357
358 switch (hdr->element_id) {
359 case WLAN_EID_SSID:
360 case WLAN_EID_SUPP_RATES:
361 case WLAN_EID_COUNTRY:
362 case WLAN_EID_PWR_CONSTRAINT:
363 case WLAN_EID_ERP_INFO:
364 case WLAN_EID_EXT_SUPP_RATES:
365 case WLAN_EID_HT_CAPABILITY:
366 case WLAN_EID_HT_OPERATION:
367 case WLAN_EID_VHT_CAPABILITY:
368 case WLAN_EID_VHT_OPERATION:
369 break;
370 case WLAN_EID_VENDOR_SPECIFIC:
371 /* Skip only Microsoft WMM IE */
372 if (cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT,
373 WLAN_OUI_TYPE_MICROSOFT_WMM,
374 (const u8 *)hdr,
375 token_len))
376 break;
377 fallthrough;
378 default:
379 if (ie_len + token_len > IEEE_MAX_IE_SIZE) {
380 err = -EINVAL;
381 goto out;
382 }
383 memcpy(gen_ie->ie_buffer + ie_len, hdr, token_len);
384 ie_len += token_len;
385 break;
386 }
387 left_len -= token_len;
388 parsed_len += token_len;
389 }
390
391 /* parse only WPA vendor IE from tail, WMM IE is configured by
392 * bss_config command
393 */
394 vendorhdr = (void *)cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT,
395 WLAN_OUI_TYPE_MICROSOFT_WPA,
396 info->tail, info->tail_len);
397 if (vendorhdr) {
398 token_len = vendorhdr->len + sizeof(struct ieee_types_header);
399 if (ie_len + token_len > IEEE_MAX_IE_SIZE) {
400 err = -EINVAL;
401 goto out;
402 }
403 memcpy(gen_ie->ie_buffer + ie_len, vendorhdr, token_len);
404 ie_len += token_len;
405 }
406
407 if (!ie_len)
408 goto out;
409
410 gen_ie->ie_index = cpu_to_le16(gen_idx);
411 gen_ie->mgmt_subtype_mask = cpu_to_le16(MGMT_MASK_BEACON |
412 MGMT_MASK_PROBE_RESP |
413 MGMT_MASK_ASSOC_RESP);
414 gen_ie->ie_length = cpu_to_le16(ie_len);
415
416 if (mwifiex_update_uap_custom_ie(priv, gen_ie, &gen_idx, NULL, NULL,
417 NULL, NULL)) {
418 err = -EINVAL;
419 goto out;
420 }
421
422 priv->gen_idx = gen_idx;
423
424 out:
425 kfree(gen_ie);
426 return err;
427 }
428
429 /* This function parses different IEs-head & tail IEs, beacon IEs,
430 * probe response IEs, association response IEs from cfg80211_ap_settings
431 * function and sets these IE to FW.
432 */
mwifiex_set_mgmt_ies(struct mwifiex_private * priv,struct cfg80211_beacon_data * info)433 int mwifiex_set_mgmt_ies(struct mwifiex_private *priv,
434 struct cfg80211_beacon_data *info)
435 {
436 int ret;
437
438 ret = mwifiex_uap_parse_tail_ies(priv, info);
439
440 if (ret)
441 return ret;
442
443 return mwifiex_set_mgmt_beacon_data_ies(priv, info);
444 }
445
446 /* This function removes management IE set */
mwifiex_del_mgmt_ies(struct mwifiex_private * priv)447 int mwifiex_del_mgmt_ies(struct mwifiex_private *priv)
448 {
449 struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL;
450 struct mwifiex_ie *ar_ie = NULL, *gen_ie = NULL;
451 int ret = 0;
452
453 if (priv->gen_idx != MWIFIEX_AUTO_IDX_MASK) {
454 gen_ie = kmalloc(sizeof(*gen_ie), GFP_KERNEL);
455 if (!gen_ie)
456 return -ENOMEM;
457
458 gen_ie->ie_index = cpu_to_le16(priv->gen_idx);
459 gen_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
460 gen_ie->ie_length = 0;
461 if (mwifiex_update_uap_custom_ie(priv, gen_ie, &priv->gen_idx,
462 NULL, &priv->proberesp_idx,
463 NULL, &priv->assocresp_idx)) {
464 ret = -1;
465 goto done;
466 }
467
468 priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
469 }
470
471 if (priv->beacon_idx != MWIFIEX_AUTO_IDX_MASK) {
472 beacon_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
473 if (!beacon_ie) {
474 ret = -ENOMEM;
475 goto done;
476 }
477 beacon_ie->ie_index = cpu_to_le16(priv->beacon_idx);
478 beacon_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
479 beacon_ie->ie_length = 0;
480 }
481 if (priv->proberesp_idx != MWIFIEX_AUTO_IDX_MASK) {
482 pr_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
483 if (!pr_ie) {
484 ret = -ENOMEM;
485 goto done;
486 }
487 pr_ie->ie_index = cpu_to_le16(priv->proberesp_idx);
488 pr_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
489 pr_ie->ie_length = 0;
490 }
491 if (priv->assocresp_idx != MWIFIEX_AUTO_IDX_MASK) {
492 ar_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
493 if (!ar_ie) {
494 ret = -ENOMEM;
495 goto done;
496 }
497 ar_ie->ie_index = cpu_to_le16(priv->assocresp_idx);
498 ar_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
499 ar_ie->ie_length = 0;
500 }
501
502 if (beacon_ie || pr_ie || ar_ie)
503 ret = mwifiex_update_uap_custom_ie(priv,
504 beacon_ie, &priv->beacon_idx,
505 pr_ie, &priv->proberesp_idx,
506 ar_ie, &priv->assocresp_idx);
507
508 done:
509 kfree(gen_ie);
510 kfree(beacon_ie);
511 kfree(pr_ie);
512 kfree(ar_ie);
513
514 return ret;
515 }
516