1 /*
2 * wpa_supplicant - MBO
3 *
4 * Copyright(c) 2015 Intel Deutschland GmbH
5 * Contact Information:
6 * Intel Linux Wireless <ilw@linux.intel.com>
7 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
8 *
9 * This software may be distributed under the terms of the BSD license.
10 * See README for more details.
11 */
12
13 #include "utils/includes.h"
14
15 #include "utils/common.h"
16 #include "common/ieee802_11_defs.h"
17 #include "common/gas.h"
18 #include "rsn_supp/wpa.h"
19 #include "config.h"
20 #include "wpa_supplicant_i.h"
21 #include "driver_i.h"
22 #include "bss.h"
23 #include "scan.h"
24
25 /* type + length + oui + oui type */
26 #define MBO_IE_HEADER 6
27
28
wpas_mbo_validate_non_pref_chan(u8 oper_class,u8 chan,u8 reason)29 static int wpas_mbo_validate_non_pref_chan(u8 oper_class, u8 chan, u8 reason)
30 {
31 if (reason > MBO_NON_PREF_CHAN_REASON_INT_INTERFERENCE)
32 return -1;
33
34 /* Only checking the validity of the channel and oper_class */
35 if (ieee80211_chan_to_freq(NULL, oper_class, chan) == -1)
36 return -1;
37
38 return 0;
39 }
40
41
mbo_attr_from_mbo_ie(const u8 * mbo_ie,enum mbo_attr_id attr)42 const u8 * mbo_attr_from_mbo_ie(const u8 *mbo_ie, enum mbo_attr_id attr)
43 {
44 const u8 *mbo;
45 u8 ie_len = mbo_ie[1];
46
47 if (ie_len < MBO_IE_HEADER - 2)
48 return NULL;
49 mbo = mbo_ie + MBO_IE_HEADER;
50
51 return get_ie(mbo, 2 + ie_len - MBO_IE_HEADER, attr);
52 }
53
54
mbo_get_attr_from_ies(const u8 * ies,size_t ies_len,enum mbo_attr_id attr)55 const u8 * mbo_get_attr_from_ies(const u8 *ies, size_t ies_len,
56 enum mbo_attr_id attr)
57 {
58 const u8 *mbo_ie;
59
60 mbo_ie = get_vendor_ie(ies, ies_len, MBO_IE_VENDOR_TYPE);
61 if (!mbo_ie)
62 return NULL;
63
64 return mbo_attr_from_mbo_ie(mbo_ie, attr);
65 }
66
67
wpas_mbo_get_bss_attr(struct wpa_bss * bss,enum mbo_attr_id attr,bool beacon)68 static const u8 * wpas_mbo_get_bss_attr(struct wpa_bss *bss,
69 enum mbo_attr_id attr, bool beacon)
70 {
71 const u8 *mbo, *end;
72
73 if (!bss)
74 return NULL;
75
76 if (beacon)
77 mbo = wpa_bss_get_vendor_ie_beacon(bss, MBO_IE_VENDOR_TYPE);
78 else
79 mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE);
80 if (!mbo)
81 return NULL;
82
83 end = mbo + 2 + mbo[1];
84 mbo += MBO_IE_HEADER;
85
86 return get_ie(mbo, end - mbo, attr);
87 }
88
89
wpas_mbo_check_assoc_disallow(struct wpa_bss * bss)90 const u8 * wpas_mbo_check_assoc_disallow(struct wpa_bss *bss)
91 {
92 const u8 *assoc_disallow;
93
94 assoc_disallow = wpas_mbo_get_bss_attr(bss, MBO_ATTR_ID_ASSOC_DISALLOW,
95 bss->beacon_newer);
96 if (assoc_disallow && assoc_disallow[1] >= 1)
97 return assoc_disallow;
98
99 return NULL;
100 }
101
102
wpas_mbo_check_pmf(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid)103 void wpas_mbo_check_pmf(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
104 struct wpa_ssid *ssid)
105 {
106 const u8 *rsne, *mbo, *oce;
107 struct wpa_ie_data ie;
108
109 wpa_s->disable_mbo_oce = 0;
110 if (!bss)
111 return;
112 mbo = wpas_mbo_get_bss_attr(bss, MBO_ATTR_ID_AP_CAPA_IND, false);
113 oce = wpas_mbo_get_bss_attr(bss, OCE_ATTR_ID_CAPA_IND, false);
114 if (!mbo && !oce)
115 return;
116 if (oce && oce[1] >= 1 && (oce[2] & OCE_IS_STA_CFON))
117 return; /* STA-CFON is not required to enable PMF */
118 rsne = wpa_bss_get_rsne(wpa_s, bss, ssid, false);
119 if (!rsne || wpa_parse_wpa_ie(rsne, 2 + rsne[1], &ie) < 0)
120 return; /* AP is not using RSN */
121
122 if (!(ie.capabilities & WPA_CAPABILITY_MFPC))
123 wpa_s->disable_mbo_oce = 1; /* AP uses RSN without PMF */
124 if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
125 wpa_s->disable_mbo_oce = 1; /* STA uses RSN without PMF */
126 if (wpa_s->disable_mbo_oce)
127 wpa_printf(MSG_INFO,
128 "MBO: Disable MBO/OCE due to misbehaving AP not having enabled PMF");
129 }
130
131
wpas_mbo_non_pref_chan_attr_body(struct wpa_supplicant * wpa_s,struct wpabuf * mbo,u8 start,u8 end)132 static void wpas_mbo_non_pref_chan_attr_body(struct wpa_supplicant *wpa_s,
133 struct wpabuf *mbo,
134 u8 start, u8 end)
135 {
136 u8 i;
137
138 wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].oper_class);
139
140 for (i = start; i < end; i++)
141 wpabuf_put_u8(mbo, wpa_s->non_pref_chan[i].chan);
142
143 wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].preference);
144 wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].reason);
145 }
146
147
wpas_mbo_non_pref_chan_attr_hdr(struct wpabuf * mbo,size_t size)148 static void wpas_mbo_non_pref_chan_attr_hdr(struct wpabuf *mbo, size_t size)
149 {
150 wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT);
151 wpabuf_put_u8(mbo, size); /* Length */
152 }
153
154
wpas_mbo_non_pref_chan_attr(struct wpa_supplicant * wpa_s,struct wpabuf * mbo,u8 start,u8 end)155 static void wpas_mbo_non_pref_chan_attr(struct wpa_supplicant *wpa_s,
156 struct wpabuf *mbo, u8 start, u8 end)
157 {
158 size_t size = end - start + 3;
159
160 if (size + 2 > wpabuf_tailroom(mbo))
161 return;
162
163 wpas_mbo_non_pref_chan_attr_hdr(mbo, size);
164 wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end);
165 }
166
167
wpas_mbo_non_pref_chan_subelem_hdr(struct wpabuf * mbo,u8 len)168 static void wpas_mbo_non_pref_chan_subelem_hdr(struct wpabuf *mbo, u8 len)
169 {
170 wpabuf_put_u8(mbo, WLAN_EID_VENDOR_SPECIFIC);
171 wpabuf_put_u8(mbo, len); /* Length */
172 wpabuf_put_be24(mbo, OUI_WFA);
173 wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT);
174 }
175
176
wpas_mbo_non_pref_chan_subelement(struct wpa_supplicant * wpa_s,struct wpabuf * mbo,u8 start,u8 end)177 static void wpas_mbo_non_pref_chan_subelement(struct wpa_supplicant *wpa_s,
178 struct wpabuf *mbo, u8 start,
179 u8 end)
180 {
181 size_t size = end - start + 7;
182
183 if (size + 2 > wpabuf_tailroom(mbo))
184 return;
185
186 wpas_mbo_non_pref_chan_subelem_hdr(mbo, size);
187 wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end);
188 }
189
190
wpas_mbo_non_pref_chan_attrs(struct wpa_supplicant * wpa_s,struct wpabuf * mbo,int subelement)191 static void wpas_mbo_non_pref_chan_attrs(struct wpa_supplicant *wpa_s,
192 struct wpabuf *mbo, int subelement)
193 {
194 u8 i, start = 0;
195 struct wpa_mbo_non_pref_channel *start_pref;
196
197 if (!wpa_s->non_pref_chan || !wpa_s->non_pref_chan_num) {
198 if (subelement)
199 wpas_mbo_non_pref_chan_subelem_hdr(mbo, 4);
200 else
201 wpas_mbo_non_pref_chan_attr_hdr(mbo, 0);
202 return;
203 }
204 start_pref = &wpa_s->non_pref_chan[0];
205
206 for (i = 1; i <= wpa_s->non_pref_chan_num; i++) {
207 struct wpa_mbo_non_pref_channel *non_pref = NULL;
208
209 if (i < wpa_s->non_pref_chan_num)
210 non_pref = &wpa_s->non_pref_chan[i];
211 if (!non_pref ||
212 non_pref->oper_class != start_pref->oper_class ||
213 non_pref->reason != start_pref->reason ||
214 non_pref->preference != start_pref->preference) {
215 if (subelement)
216 wpas_mbo_non_pref_chan_subelement(wpa_s, mbo,
217 start, i);
218 else
219 wpas_mbo_non_pref_chan_attr(wpa_s, mbo, start,
220 i);
221
222 if (!non_pref)
223 return;
224
225 start = i;
226 start_pref = non_pref;
227 }
228 }
229 }
230
231
wpas_mbo_ie(struct wpa_supplicant * wpa_s,u8 * buf,size_t len,int add_oce_capa)232 int wpas_mbo_ie(struct wpa_supplicant *wpa_s, u8 *buf, size_t len,
233 int add_oce_capa)
234 {
235 struct wpabuf *mbo;
236 int res;
237
238 if (len < MBO_IE_HEADER + 3 + 7 +
239 ((wpa_s->enable_oce & OCE_STA) ? 3 : 0))
240 return 0;
241
242 /* Leave room for the MBO IE header */
243 mbo = wpabuf_alloc(len - MBO_IE_HEADER);
244 if (!mbo)
245 return 0;
246
247 /* Add non-preferred channels attribute */
248 wpas_mbo_non_pref_chan_attrs(wpa_s, mbo, 0);
249
250 /*
251 * Send cellular capabilities attribute even if AP does not advertise
252 * cellular capabilities.
253 */
254 wpabuf_put_u8(mbo, MBO_ATTR_ID_CELL_DATA_CAPA);
255 wpabuf_put_u8(mbo, 1);
256 wpabuf_put_u8(mbo, wpa_s->conf->mbo_cell_capa);
257
258 /* Add OCE capability indication attribute if OCE is enabled */
259 if ((wpa_s->enable_oce & OCE_STA) && add_oce_capa) {
260 wpabuf_put_u8(mbo, OCE_ATTR_ID_CAPA_IND);
261 wpabuf_put_u8(mbo, 1);
262 wpabuf_put_u8(mbo, OCE_RELEASE);
263 }
264
265 res = mbo_add_ie(buf, len, wpabuf_head_u8(mbo), wpabuf_len(mbo));
266 if (!res)
267 wpa_printf(MSG_ERROR, "Failed to add MBO/OCE IE");
268
269 wpabuf_free(mbo);
270 return res;
271 }
272
273
wpas_mbo_send_wnm_notification(struct wpa_supplicant * wpa_s,const u8 * data,size_t len)274 static void wpas_mbo_send_wnm_notification(struct wpa_supplicant *wpa_s,
275 const u8 *data, size_t len)
276 {
277 struct wpabuf *buf;
278 int res;
279
280 /*
281 * Send WNM-Notification Request frame only in case of a change in
282 * non-preferred channels list during association, if the AP supports
283 * MBO.
284 */
285 if (wpa_s->wpa_state != WPA_COMPLETED || !wpa_s->current_bss ||
286 !wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE))
287 return;
288
289 buf = wpabuf_alloc(4 + len);
290 if (!buf)
291 return;
292
293 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
294 wpabuf_put_u8(buf, WNM_NOTIFICATION_REQ);
295 wpa_s->mbo_wnm_token++;
296 if (wpa_s->mbo_wnm_token == 0)
297 wpa_s->mbo_wnm_token++;
298 wpabuf_put_u8(buf, wpa_s->mbo_wnm_token);
299 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); /* Type */
300
301 wpabuf_put_data(buf, data, len);
302
303 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
304 wpa_s->own_addr, wpa_s->bssid,
305 wpabuf_head(buf), wpabuf_len(buf), 0);
306 if (res < 0)
307 wpa_printf(MSG_DEBUG,
308 "Failed to send WNM-Notification Request frame with non-preferred channel list");
309
310 wpabuf_free(buf);
311 }
312
313
wpas_mbo_non_pref_chan_changed(struct wpa_supplicant * wpa_s)314 static void wpas_mbo_non_pref_chan_changed(struct wpa_supplicant *wpa_s)
315 {
316 struct wpabuf *buf;
317
318 buf = wpabuf_alloc(512);
319 if (!buf)
320 return;
321
322 wpas_mbo_non_pref_chan_attrs(wpa_s, buf, 1);
323 wpas_mbo_send_wnm_notification(wpa_s, wpabuf_head_u8(buf),
324 wpabuf_len(buf));
325 wpas_update_mbo_connect_params(wpa_s);
326 wpabuf_free(buf);
327 }
328
329
wpa_non_pref_chan_is_eq(struct wpa_mbo_non_pref_channel * a,struct wpa_mbo_non_pref_channel * b)330 static int wpa_non_pref_chan_is_eq(struct wpa_mbo_non_pref_channel *a,
331 struct wpa_mbo_non_pref_channel *b)
332 {
333 return a->oper_class == b->oper_class && a->chan == b->chan;
334 }
335
336
337 /*
338 * wpa_non_pref_chan_cmp - Compare two channels for sorting
339 *
340 * In MBO IE non-preferred channel subelement we can put many channels in an
341 * attribute if they are in the same operating class and have the same
342 * preference and reason. To make it easy for the functions that build
343 * the IE attributes and WNM Request subelements, save the channels sorted
344 * by their oper_class and reason.
345 */
wpa_non_pref_chan_cmp(const void * _a,const void * _b)346 static int wpa_non_pref_chan_cmp(const void *_a, const void *_b)
347 {
348 const struct wpa_mbo_non_pref_channel *a = _a, *b = _b;
349
350 if (a->oper_class != b->oper_class)
351 return (int) a->oper_class - (int) b->oper_class;
352 if (a->reason != b->reason)
353 return (int) a->reason - (int) b->reason;
354 return (int) a->preference - (int) b->preference;
355 }
356
357
wpas_mbo_update_non_pref_chan(struct wpa_supplicant * wpa_s,const char * non_pref_chan)358 int wpas_mbo_update_non_pref_chan(struct wpa_supplicant *wpa_s,
359 const char *non_pref_chan)
360 {
361 char *cmd, *token, *context = NULL;
362 struct wpa_mbo_non_pref_channel *chans = NULL, *tmp_chans;
363 size_t num = 0, size = 0;
364 unsigned i;
365
366 wpa_printf(MSG_DEBUG, "MBO: Update non-preferred channels, non_pref_chan=%s",
367 non_pref_chan ? non_pref_chan : "N/A");
368
369 /*
370 * The shortest channel configuration is 7 characters - 3 colons and
371 * 4 values.
372 */
373 if (!non_pref_chan || os_strlen(non_pref_chan) < 7)
374 goto update;
375
376 cmd = os_strdup(non_pref_chan);
377 if (!cmd)
378 return -1;
379
380 while ((token = str_token(cmd, " ", &context))) {
381 struct wpa_mbo_non_pref_channel *chan;
382 int ret;
383 unsigned int _oper_class;
384 unsigned int _chan;
385 unsigned int _preference;
386 unsigned int _reason;
387
388 if (num == size) {
389 size = size ? size * 2 : 1;
390 tmp_chans = os_realloc_array(chans, size,
391 sizeof(*chans));
392 if (!tmp_chans) {
393 wpa_printf(MSG_ERROR,
394 "Couldn't reallocate non_pref_chan");
395 goto fail;
396 }
397 chans = tmp_chans;
398 }
399
400 chan = &chans[num];
401
402 ret = sscanf(token, "%u:%u:%u:%u", &_oper_class,
403 &_chan, &_preference, &_reason);
404 if (ret != 4 ||
405 _oper_class > 255 || _chan > 255 ||
406 _preference > 255 || _reason > 65535 ) {
407 wpa_printf(MSG_ERROR, "Invalid non-pref chan input %s",
408 token);
409 goto fail;
410 }
411 chan->oper_class = _oper_class;
412 chan->chan = _chan;
413 chan->preference = _preference;
414 chan->reason = _reason;
415
416 if (wpas_mbo_validate_non_pref_chan(chan->oper_class,
417 chan->chan, chan->reason)) {
418 wpa_printf(MSG_ERROR,
419 "Invalid non_pref_chan: oper class %d chan %d reason %d",
420 chan->oper_class, chan->chan, chan->reason);
421 goto fail;
422 }
423
424 for (i = 0; i < num; i++)
425 if (wpa_non_pref_chan_is_eq(chan, &chans[i]))
426 break;
427 if (i != num) {
428 wpa_printf(MSG_ERROR,
429 "oper class %d chan %d is duplicated",
430 chan->oper_class, chan->chan);
431 goto fail;
432 }
433
434 num++;
435 }
436
437 os_free(cmd);
438
439 if (chans) {
440 qsort(chans, num, sizeof(struct wpa_mbo_non_pref_channel),
441 wpa_non_pref_chan_cmp);
442 }
443
444 update:
445 os_free(wpa_s->non_pref_chan);
446 wpa_s->non_pref_chan = chans;
447 wpa_s->non_pref_chan_num = num;
448 wpas_mbo_non_pref_chan_changed(wpa_s);
449
450 return 0;
451
452 fail:
453 os_free(chans);
454 os_free(cmd);
455 return -1;
456 }
457
458
wpas_mbo_scan_ie(struct wpa_supplicant * wpa_s,struct wpabuf * ie)459 void wpas_mbo_scan_ie(struct wpa_supplicant *wpa_s, struct wpabuf *ie)
460 {
461 u8 *len;
462
463 if (wpa_s->drv_max_probe_req_ie_len <
464 9 + ((wpa_s->enable_oce & OCE_STA) ? 3 : 0))
465 return;
466
467 wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
468 len = wpabuf_put(ie, 1);
469
470 wpabuf_put_be24(ie, OUI_WFA);
471 wpabuf_put_u8(ie, MBO_OUI_TYPE);
472
473 wpabuf_put_u8(ie, MBO_ATTR_ID_CELL_DATA_CAPA);
474 wpabuf_put_u8(ie, 1);
475 wpabuf_put_u8(ie, wpa_s->conf->mbo_cell_capa);
476 if (wpa_s->enable_oce & OCE_STA) {
477 wpabuf_put_u8(ie, OCE_ATTR_ID_CAPA_IND);
478 wpabuf_put_u8(ie, 1);
479 wpabuf_put_u8(ie, OCE_RELEASE);
480 }
481 *len = (u8 *) wpabuf_put(ie, 0) - len - 1;
482 }
483
484
wpas_mbo_ie_trans_req(struct wpa_supplicant * wpa_s,const u8 * mbo_ie,size_t len)485 void wpas_mbo_ie_trans_req(struct wpa_supplicant *wpa_s, const u8 *mbo_ie,
486 size_t len)
487 {
488 const u8 *pos, *cell_pref = NULL;
489 u8 id, elen;
490 u16 disallowed_sec = 0;
491
492 if (len <= 4 || WPA_GET_BE24(mbo_ie) != OUI_WFA ||
493 mbo_ie[3] != MBO_OUI_TYPE)
494 return;
495
496 pos = mbo_ie + 4;
497 len -= 4;
498
499 while (len >= 2) {
500 id = *pos++;
501 elen = *pos++;
502 len -= 2;
503
504 if (elen > len)
505 goto fail;
506
507 switch (id) {
508 case MBO_ATTR_ID_CELL_DATA_PREF:
509 if (elen != 1)
510 goto fail;
511
512 if (wpa_s->conf->mbo_cell_capa ==
513 MBO_CELL_CAPA_AVAILABLE)
514 cell_pref = pos;
515 else
516 wpa_printf(MSG_DEBUG,
517 "MBO: Station does not support Cellular data connection");
518 break;
519 case MBO_ATTR_ID_TRANSITION_REASON:
520 if (elen != 1)
521 goto fail;
522
523 wpa_s->wnm_mbo_trans_reason_present = 1;
524 wpa_s->wnm_mbo_transition_reason = *pos;
525 break;
526 case MBO_ATTR_ID_ASSOC_RETRY_DELAY:
527 if (elen != 2)
528 goto fail;
529
530 if (wpa_s->wnm_mode &
531 WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
532 wpa_printf(MSG_DEBUG,
533 "MBO: Unexpected association retry delay, BSS is terminating");
534 goto fail;
535 } else if (wpa_s->wnm_mode &
536 WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
537 disallowed_sec = WPA_GET_LE16(pos);
538 wpa_printf(MSG_DEBUG,
539 "MBO: Association retry delay: %u",
540 disallowed_sec);
541 } else {
542 wpa_printf(MSG_DEBUG,
543 "MBO: Association retry delay attribute not in disassoc imminent mode");
544 }
545
546 break;
547 case MBO_ATTR_ID_AP_CAPA_IND:
548 case MBO_ATTR_ID_NON_PREF_CHAN_REPORT:
549 case MBO_ATTR_ID_CELL_DATA_CAPA:
550 case MBO_ATTR_ID_ASSOC_DISALLOW:
551 case MBO_ATTR_ID_TRANSITION_REJECT_REASON:
552 wpa_printf(MSG_DEBUG,
553 "MBO: Attribute %d should not be included in BTM Request frame",
554 id);
555 break;
556 default:
557 wpa_printf(MSG_DEBUG, "MBO: Unknown attribute id %u",
558 id);
559 return;
560 }
561
562 pos += elen;
563 len -= elen;
564 }
565
566 if (cell_pref)
567 wpa_msg(wpa_s, MSG_INFO, MBO_CELL_PREFERENCE "preference=%u",
568 *cell_pref);
569
570 if (wpa_s->wnm_mbo_trans_reason_present)
571 wpa_msg(wpa_s, MSG_INFO, MBO_TRANSITION_REASON "reason=%u",
572 wpa_s->wnm_mbo_transition_reason);
573
574 if (disallowed_sec && wpa_s->current_bss)
575 wpa_bss_tmp_disallow(wpa_s, wpa_s->current_bss->bssid,
576 disallowed_sec, 0);
577
578 return;
579 fail:
580 wpa_printf(MSG_DEBUG, "MBO IE parsing failed (id=%u len=%u left=%zu)",
581 id, elen, len);
582 }
583
584
wpas_mbo_ie_bss_trans_reject(struct wpa_supplicant * wpa_s,u8 * pos,size_t len,enum mbo_transition_reject_reason reason)585 size_t wpas_mbo_ie_bss_trans_reject(struct wpa_supplicant *wpa_s, u8 *pos,
586 size_t len,
587 enum mbo_transition_reject_reason reason)
588 {
589 u8 reject_attr[3];
590
591 reject_attr[0] = MBO_ATTR_ID_TRANSITION_REJECT_REASON;
592 reject_attr[1] = 1;
593 reject_attr[2] = reason;
594
595 return mbo_add_ie(pos, len, reject_attr, sizeof(reject_attr));
596 }
597
598
wpas_mbo_update_cell_capa(struct wpa_supplicant * wpa_s,u8 mbo_cell_capa)599 void wpas_mbo_update_cell_capa(struct wpa_supplicant *wpa_s, u8 mbo_cell_capa)
600 {
601 u8 cell_capa[7];
602
603 if (wpa_s->conf->mbo_cell_capa == mbo_cell_capa) {
604 wpa_printf(MSG_DEBUG,
605 "MBO: Cellular capability already set to %u",
606 mbo_cell_capa);
607 return;
608 }
609
610 wpa_s->conf->mbo_cell_capa = mbo_cell_capa;
611
612 cell_capa[0] = WLAN_EID_VENDOR_SPECIFIC;
613 cell_capa[1] = 5; /* Length */
614 WPA_PUT_BE24(cell_capa + 2, OUI_WFA);
615 cell_capa[5] = MBO_ATTR_ID_CELL_DATA_CAPA;
616 cell_capa[6] = mbo_cell_capa;
617
618 wpas_mbo_send_wnm_notification(wpa_s, cell_capa, 7);
619 wpa_supplicant_set_default_scan_ies(wpa_s);
620 wpas_update_mbo_connect_params(wpa_s);
621 }
622
623
mbo_build_anqp_buf(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,u32 mbo_subtypes)624 struct wpabuf * mbo_build_anqp_buf(struct wpa_supplicant *wpa_s,
625 struct wpa_bss *bss, u32 mbo_subtypes)
626 {
627 struct wpabuf *anqp_buf;
628 u8 *len_pos;
629 u8 i;
630
631 if (!wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE)) {
632 wpa_printf(MSG_INFO, "MBO: " MACSTR
633 " does not support MBO - cannot request MBO ANQP elements from it",
634 MAC2STR(bss->bssid));
635 return NULL;
636 }
637
638 /* Allocate size for the maximum case - all MBO subtypes are set */
639 anqp_buf = wpabuf_alloc(9 + MAX_MBO_ANQP_SUBTYPE);
640 if (!anqp_buf)
641 return NULL;
642
643 len_pos = gas_anqp_add_element(anqp_buf, ANQP_VENDOR_SPECIFIC);
644 wpabuf_put_be24(anqp_buf, OUI_WFA);
645 wpabuf_put_u8(anqp_buf, MBO_ANQP_OUI_TYPE);
646
647 wpabuf_put_u8(anqp_buf, MBO_ANQP_SUBTYPE_QUERY_LIST);
648
649 /* The first valid MBO subtype is 1 */
650 for (i = 1; i <= MAX_MBO_ANQP_SUBTYPE; i++) {
651 if (mbo_subtypes & BIT(i))
652 wpabuf_put_u8(anqp_buf, i);
653 }
654
655 gas_anqp_set_element_len(anqp_buf, len_pos);
656
657 return anqp_buf;
658 }
659
660
mbo_parse_rx_anqp_resp(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,const u8 * sa,const u8 * data,size_t slen)661 void mbo_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
662 struct wpa_bss *bss, const u8 *sa,
663 const u8 *data, size_t slen)
664 {
665 const u8 *pos = data;
666 u8 subtype;
667
668 if (slen < 1)
669 return;
670
671 subtype = *pos++;
672 slen--;
673
674 switch (subtype) {
675 case MBO_ANQP_SUBTYPE_CELL_CONN_PREF:
676 if (slen < 1)
677 break;
678 wpa_msg(wpa_s, MSG_INFO, RX_MBO_ANQP MACSTR
679 " cell_conn_pref=%u", MAC2STR(sa), *pos);
680 break;
681 default:
682 wpa_printf(MSG_DEBUG, "MBO: Unsupported ANQP subtype %u",
683 subtype);
684 break;
685 }
686 }
687