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Commit | Line | Data |
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92c6e2e3 DS |
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" | |
8f479174 | 17 | #include "common/gas.h" |
92c6e2e3 DS |
18 | #include "config.h" |
19 | #include "wpa_supplicant_i.h" | |
20 | #include "driver_i.h" | |
21 | #include "bss.h" | |
cc9985d1 | 22 | #include "scan.h" |
92c6e2e3 DS |
23 | |
24 | /* type + length + oui + oui type */ | |
25 | #define MBO_IE_HEADER 6 | |
26 | ||
27 | ||
28 | static int wpas_mbo_validate_non_pref_chan(u8 oper_class, u8 chan, u8 reason) | |
29 | { | |
30 | if (reason > MBO_NON_PREF_CHAN_REASON_INT_INTERFERENCE) | |
31 | return -1; | |
32 | ||
33 | /* Only checking the validity of the channel and oper_class */ | |
34 | if (ieee80211_chan_to_freq(NULL, oper_class, chan) == -1) | |
35 | return -1; | |
36 | ||
37 | return 0; | |
38 | } | |
39 | ||
40 | ||
cb06cf34 DS |
41 | const u8 * wpas_mbo_get_bss_attr(struct wpa_bss *bss, enum mbo_attr_id attr) |
42 | { | |
43 | const u8 *mbo, *end; | |
44 | ||
45 | if (!bss) | |
46 | return NULL; | |
47 | ||
48 | mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE); | |
49 | if (!mbo) | |
50 | return NULL; | |
51 | ||
52 | end = mbo + 2 + mbo[1]; | |
53 | mbo += MBO_IE_HEADER; | |
54 | ||
55 | return get_ie(mbo, end - mbo, attr); | |
56 | } | |
57 | ||
58 | ||
92c6e2e3 DS |
59 | static void wpas_mbo_non_pref_chan_attr_body(struct wpa_supplicant *wpa_s, |
60 | struct wpabuf *mbo, | |
61 | u8 start, u8 end) | |
62 | { | |
63 | u8 i; | |
64 | ||
65 | wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].oper_class); | |
66 | ||
67 | for (i = start; i < end; i++) | |
68 | wpabuf_put_u8(mbo, wpa_s->non_pref_chan[i].chan); | |
69 | ||
70 | wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].preference); | |
71 | wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].reason); | |
92c6e2e3 DS |
72 | } |
73 | ||
74 | ||
75 | static void wpas_mbo_non_pref_chan_attr(struct wpa_supplicant *wpa_s, | |
76 | struct wpabuf *mbo, u8 start, u8 end) | |
77 | { | |
4a83d4b6 | 78 | size_t size = end - start + 3; |
92c6e2e3 DS |
79 | |
80 | if (size + 2 > wpabuf_tailroom(mbo)) | |
81 | return; | |
82 | ||
83 | wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT); | |
84 | wpabuf_put_u8(mbo, size); /* Length */ | |
85 | ||
86 | wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end); | |
87 | } | |
88 | ||
89 | ||
2d5b8614 DS |
90 | static void wpas_mbo_non_pref_chan_subelem_hdr(struct wpabuf *mbo, u8 len) |
91 | { | |
92 | wpabuf_put_u8(mbo, WLAN_EID_VENDOR_SPECIFIC); | |
93 | wpabuf_put_u8(mbo, len); /* Length */ | |
94 | wpabuf_put_be24(mbo, OUI_WFA); | |
95 | wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT); | |
96 | } | |
97 | ||
98 | ||
99 | static void wpas_mbo_non_pref_chan_subelement(struct wpa_supplicant *wpa_s, | |
100 | struct wpabuf *mbo, u8 start, | |
101 | u8 end) | |
102 | { | |
4a83d4b6 | 103 | size_t size = end - start + 7; |
2d5b8614 DS |
104 | |
105 | if (size + 2 > wpabuf_tailroom(mbo)) | |
106 | return; | |
107 | ||
108 | wpas_mbo_non_pref_chan_subelem_hdr(mbo, size); | |
109 | wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end); | |
110 | } | |
111 | ||
92c6e2e3 | 112 | |
2d5b8614 DS |
113 | static void wpas_mbo_non_pref_chan_attrs(struct wpa_supplicant *wpa_s, |
114 | struct wpabuf *mbo, int subelement) | |
92c6e2e3 DS |
115 | { |
116 | u8 i, start = 0; | |
117 | struct wpa_mbo_non_pref_channel *start_pref; | |
118 | ||
2d5b8614 DS |
119 | if (!wpa_s->non_pref_chan || !wpa_s->non_pref_chan_num) { |
120 | if (subelement) | |
121 | wpas_mbo_non_pref_chan_subelem_hdr(mbo, 4); | |
92c6e2e3 | 122 | return; |
2d5b8614 | 123 | } |
92c6e2e3 DS |
124 | start_pref = &wpa_s->non_pref_chan[0]; |
125 | ||
126 | for (i = 1; i <= wpa_s->non_pref_chan_num; i++) { | |
127 | struct wpa_mbo_non_pref_channel *non_pref = NULL; | |
128 | ||
129 | if (i < wpa_s->non_pref_chan_num) | |
130 | non_pref = &wpa_s->non_pref_chan[i]; | |
131 | if (!non_pref || | |
132 | non_pref->oper_class != start_pref->oper_class || | |
133 | non_pref->reason != start_pref->reason || | |
92c6e2e3 | 134 | non_pref->preference != start_pref->preference) { |
2d5b8614 DS |
135 | if (subelement) |
136 | wpas_mbo_non_pref_chan_subelement(wpa_s, mbo, | |
137 | start, i); | |
138 | else | |
139 | wpas_mbo_non_pref_chan_attr(wpa_s, mbo, start, | |
140 | i); | |
92c6e2e3 DS |
141 | |
142 | if (!non_pref) | |
143 | return; | |
144 | ||
145 | start = i; | |
146 | start_pref = non_pref; | |
147 | } | |
148 | } | |
149 | } | |
150 | ||
151 | ||
152 | int wpas_mbo_ie(struct wpa_supplicant *wpa_s, u8 *buf, size_t len) | |
153 | { | |
154 | struct wpabuf *mbo; | |
155 | int res; | |
156 | ||
c5d193d7 | 157 | if (len < MBO_IE_HEADER + 3 + 7) |
92c6e2e3 DS |
158 | return 0; |
159 | ||
160 | /* Leave room for the MBO IE header */ | |
161 | mbo = wpabuf_alloc(len - MBO_IE_HEADER); | |
162 | if (!mbo) | |
163 | return 0; | |
164 | ||
165 | /* Add non-preferred channels attribute */ | |
2d5b8614 | 166 | wpas_mbo_non_pref_chan_attrs(wpa_s, mbo, 0); |
92c6e2e3 | 167 | |
c5d193d7 DS |
168 | /* |
169 | * Send cellular capabilities attribute even if AP does not advertise | |
170 | * cellular capabilities. | |
171 | */ | |
172 | wpabuf_put_u8(mbo, MBO_ATTR_ID_CELL_DATA_CAPA); | |
173 | wpabuf_put_u8(mbo, 1); | |
174 | wpabuf_put_u8(mbo, wpa_s->conf->mbo_cell_capa); | |
175 | ||
92c6e2e3 DS |
176 | res = mbo_add_ie(buf, len, wpabuf_head_u8(mbo), wpabuf_len(mbo)); |
177 | if (!res) | |
178 | wpa_printf(MSG_ERROR, "Failed to add MBO IE"); | |
179 | ||
180 | wpabuf_free(mbo); | |
181 | return res; | |
182 | } | |
183 | ||
184 | ||
016082e9 AS |
185 | static void wpas_mbo_send_wnm_notification(struct wpa_supplicant *wpa_s, |
186 | const u8 *data, size_t len) | |
2d5b8614 DS |
187 | { |
188 | struct wpabuf *buf; | |
189 | int res; | |
190 | ||
191 | /* | |
192 | * Send WNM-Notification Request frame only in case of a change in | |
193 | * non-preferred channels list during association, if the AP supports | |
194 | * MBO. | |
195 | */ | |
196 | if (wpa_s->wpa_state != WPA_COMPLETED || !wpa_s->current_bss || | |
197 | !wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE)) | |
198 | return; | |
199 | ||
016082e9 | 200 | buf = wpabuf_alloc(4 + len); |
2d5b8614 DS |
201 | if (!buf) |
202 | return; | |
203 | ||
204 | wpabuf_put_u8(buf, WLAN_ACTION_WNM); | |
205 | wpabuf_put_u8(buf, WNM_NOTIFICATION_REQ); | |
206 | wpa_s->mbo_wnm_token++; | |
207 | if (wpa_s->mbo_wnm_token == 0) | |
208 | wpa_s->mbo_wnm_token++; | |
209 | wpabuf_put_u8(buf, wpa_s->mbo_wnm_token); | |
210 | wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); /* Type */ | |
211 | ||
016082e9 | 212 | wpabuf_put_data(buf, data, len); |
2d5b8614 DS |
213 | |
214 | res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, | |
215 | wpa_s->own_addr, wpa_s->bssid, | |
216 | wpabuf_head(buf), wpabuf_len(buf), 0); | |
217 | if (res < 0) | |
218 | wpa_printf(MSG_DEBUG, | |
219 | "Failed to send WNM-Notification Request frame with non-preferred channel list"); | |
220 | ||
221 | wpabuf_free(buf); | |
222 | } | |
223 | ||
224 | ||
016082e9 AS |
225 | static void wpas_mbo_non_pref_chan_changed(struct wpa_supplicant *wpa_s) |
226 | { | |
227 | struct wpabuf *buf; | |
228 | ||
229 | buf = wpabuf_alloc(512); | |
230 | if (!buf) | |
231 | return; | |
232 | ||
233 | wpas_mbo_non_pref_chan_attrs(wpa_s, buf, 1); | |
234 | wpas_mbo_send_wnm_notification(wpa_s, wpabuf_head_u8(buf), | |
235 | wpabuf_len(buf)); | |
236 | wpabuf_free(buf); | |
237 | } | |
238 | ||
239 | ||
92c6e2e3 DS |
240 | static int wpa_non_pref_chan_is_eq(struct wpa_mbo_non_pref_channel *a, |
241 | struct wpa_mbo_non_pref_channel *b) | |
242 | { | |
243 | return a->oper_class == b->oper_class && a->chan == b->chan; | |
244 | } | |
245 | ||
246 | ||
247 | /* | |
248 | * wpa_non_pref_chan_cmp - Compare two channels for sorting | |
249 | * | |
250 | * In MBO IE non-preferred channel subelement we can put many channels in an | |
251 | * attribute if they are in the same operating class and have the same | |
4a83d4b6 | 252 | * preference and reason. To make it easy for the functions that build |
253 | * the IE attributes and WNM Request subelements, save the channels sorted | |
254 | * by their oper_class and reason. | |
92c6e2e3 DS |
255 | */ |
256 | static int wpa_non_pref_chan_cmp(const void *_a, const void *_b) | |
257 | { | |
258 | const struct wpa_mbo_non_pref_channel *a = _a, *b = _b; | |
259 | ||
260 | if (a->oper_class != b->oper_class) | |
261 | return a->oper_class - b->oper_class; | |
262 | if (a->reason != b->reason) | |
263 | return a->reason - b->reason; | |
92c6e2e3 DS |
264 | return a->preference - b->preference; |
265 | } | |
266 | ||
267 | ||
268 | int wpas_mbo_update_non_pref_chan(struct wpa_supplicant *wpa_s, | |
269 | const char *non_pref_chan) | |
270 | { | |
271 | char *cmd, *token, *context = NULL; | |
272 | struct wpa_mbo_non_pref_channel *chans = NULL, *tmp_chans; | |
273 | size_t num = 0, size = 0; | |
274 | unsigned i; | |
275 | ||
276 | wpa_printf(MSG_DEBUG, "MBO: Update non-preferred channels, non_pref_chan=%s", | |
277 | non_pref_chan ? non_pref_chan : "N/A"); | |
278 | ||
279 | /* | |
dca4b503 AP |
280 | * The shortest channel configuration is 7 characters - 3 colons and |
281 | * 4 values. | |
92c6e2e3 | 282 | */ |
dca4b503 | 283 | if (!non_pref_chan || os_strlen(non_pref_chan) < 7) |
92c6e2e3 DS |
284 | goto update; |
285 | ||
286 | cmd = os_strdup(non_pref_chan); | |
287 | if (!cmd) | |
288 | return -1; | |
289 | ||
290 | while ((token = str_token(cmd, " ", &context))) { | |
291 | struct wpa_mbo_non_pref_channel *chan; | |
292 | int ret; | |
293 | unsigned int _oper_class; | |
294 | unsigned int _chan; | |
295 | unsigned int _preference; | |
296 | unsigned int _reason; | |
92c6e2e3 DS |
297 | |
298 | if (num == size) { | |
299 | size = size ? size * 2 : 1; | |
300 | tmp_chans = os_realloc_array(chans, size, | |
301 | sizeof(*chans)); | |
302 | if (!tmp_chans) { | |
303 | wpa_printf(MSG_ERROR, | |
304 | "Couldn't reallocate non_pref_chan"); | |
305 | goto fail; | |
306 | } | |
307 | chans = tmp_chans; | |
308 | } | |
309 | ||
310 | chan = &chans[num]; | |
311 | ||
4a83d4b6 | 312 | ret = sscanf(token, "%u:%u:%u:%u", &_oper_class, |
313 | &_chan, &_preference, &_reason); | |
314 | if (ret != 4 || | |
92c6e2e3 | 315 | _oper_class > 255 || _chan > 255 || |
4a83d4b6 | 316 | _preference > 255 || _reason > 65535 ) { |
92c6e2e3 DS |
317 | wpa_printf(MSG_ERROR, "Invalid non-pref chan input %s", |
318 | token); | |
319 | goto fail; | |
320 | } | |
321 | chan->oper_class = _oper_class; | |
322 | chan->chan = _chan; | |
323 | chan->preference = _preference; | |
324 | chan->reason = _reason; | |
92c6e2e3 DS |
325 | |
326 | if (wpas_mbo_validate_non_pref_chan(chan->oper_class, | |
327 | chan->chan, chan->reason)) { | |
328 | wpa_printf(MSG_ERROR, | |
329 | "Invalid non_pref_chan: oper class %d chan %d reason %d", | |
330 | chan->oper_class, chan->chan, chan->reason); | |
331 | goto fail; | |
332 | } | |
333 | ||
334 | for (i = 0; i < num; i++) | |
335 | if (wpa_non_pref_chan_is_eq(chan, &chans[i])) | |
336 | break; | |
337 | if (i != num) { | |
338 | wpa_printf(MSG_ERROR, | |
339 | "oper class %d chan %d is duplicated", | |
340 | chan->oper_class, chan->chan); | |
341 | goto fail; | |
342 | } | |
343 | ||
344 | num++; | |
345 | } | |
346 | ||
347 | os_free(cmd); | |
348 | ||
349 | if (chans) { | |
350 | qsort(chans, num, sizeof(struct wpa_mbo_non_pref_channel), | |
351 | wpa_non_pref_chan_cmp); | |
352 | } | |
353 | ||
354 | update: | |
355 | os_free(wpa_s->non_pref_chan); | |
356 | wpa_s->non_pref_chan = chans; | |
357 | wpa_s->non_pref_chan_num = num; | |
016082e9 | 358 | wpas_mbo_non_pref_chan_changed(wpa_s); |
92c6e2e3 DS |
359 | |
360 | return 0; | |
361 | ||
362 | fail: | |
363 | os_free(chans); | |
364 | os_free(cmd); | |
365 | return -1; | |
366 | } | |
c5d193d7 DS |
367 | |
368 | ||
369 | void wpas_mbo_scan_ie(struct wpa_supplicant *wpa_s, struct wpabuf *ie) | |
370 | { | |
371 | wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC); | |
372 | wpabuf_put_u8(ie, 7); | |
373 | wpabuf_put_be24(ie, OUI_WFA); | |
374 | wpabuf_put_u8(ie, MBO_OUI_TYPE); | |
375 | ||
376 | wpabuf_put_u8(ie, MBO_ATTR_ID_CELL_DATA_CAPA); | |
377 | wpabuf_put_u8(ie, 1); | |
378 | wpabuf_put_u8(ie, wpa_s->conf->mbo_cell_capa); | |
379 | } | |
5e57ba25 AS |
380 | |
381 | ||
dd599908 AS |
382 | void wpas_mbo_ie_trans_req(struct wpa_supplicant *wpa_s, const u8 *mbo_ie, |
383 | size_t len) | |
384 | { | |
385 | const u8 *pos, *cell_pref = NULL, *reason = NULL; | |
386 | u8 id, elen; | |
387 | u16 disallowed_sec = 0; | |
388 | ||
389 | if (len <= 4 || WPA_GET_BE24(mbo_ie) != OUI_WFA || | |
390 | mbo_ie[3] != MBO_OUI_TYPE) | |
391 | return; | |
392 | ||
393 | pos = mbo_ie + 4; | |
394 | len -= 4; | |
395 | ||
396 | while (len >= 2) { | |
397 | id = *pos++; | |
398 | elen = *pos++; | |
399 | len -= 2; | |
400 | ||
401 | if (elen > len) | |
402 | goto fail; | |
403 | ||
404 | switch (id) { | |
405 | case MBO_ATTR_ID_CELL_DATA_PREF: | |
406 | if (elen != 1) | |
407 | goto fail; | |
408 | ||
409 | if (wpa_s->conf->mbo_cell_capa == | |
410 | MBO_CELL_CAPA_AVAILABLE) | |
411 | cell_pref = pos; | |
412 | else | |
413 | wpa_printf(MSG_DEBUG, | |
414 | "MBO: Station does not support Cellular data connection"); | |
415 | break; | |
416 | case MBO_ATTR_ID_TRANSITION_REASON: | |
417 | if (elen != 1) | |
418 | goto fail; | |
419 | ||
420 | reason = pos; | |
421 | break; | |
422 | case MBO_ATTR_ID_ASSOC_RETRY_DELAY: | |
423 | if (elen != 2) | |
424 | goto fail; | |
425 | ||
426 | if (wpa_s->wnm_mode & | |
427 | WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) { | |
428 | wpa_printf(MSG_DEBUG, | |
429 | "MBO: Unexpected association retry delay, BSS is terminating"); | |
430 | goto fail; | |
431 | } else if (wpa_s->wnm_mode & | |
432 | WNM_BSS_TM_REQ_DISASSOC_IMMINENT) { | |
433 | disallowed_sec = WPA_GET_LE16(pos); | |
434 | } else { | |
435 | wpa_printf(MSG_DEBUG, | |
436 | "MBO: Association retry delay attribute not in disassoc imminent mode"); | |
437 | } | |
438 | ||
439 | break; | |
440 | case MBO_ATTR_ID_AP_CAPA_IND: | |
441 | case MBO_ATTR_ID_NON_PREF_CHAN_REPORT: | |
442 | case MBO_ATTR_ID_CELL_DATA_CAPA: | |
443 | case MBO_ATTR_ID_ASSOC_DISALLOW: | |
444 | case MBO_ATTR_ID_TRANSITION_REJECT_REASON: | |
445 | wpa_printf(MSG_DEBUG, | |
446 | "MBO: Attribute %d should not be included in BTM Request frame", | |
447 | id); | |
448 | break; | |
449 | default: | |
450 | wpa_printf(MSG_DEBUG, "MBO: Unknown attribute id %u", | |
451 | id); | |
452 | return; | |
453 | } | |
454 | ||
455 | pos += elen; | |
456 | len -= elen; | |
457 | } | |
458 | ||
459 | if (cell_pref) | |
460 | wpa_msg(wpa_s, MSG_INFO, MBO_CELL_PREFERENCE "preference=%u", | |
461 | *cell_pref); | |
462 | ||
463 | if (reason) | |
464 | wpa_msg(wpa_s, MSG_INFO, MBO_TRANSITION_REASON "reason=%u", | |
465 | *reason); | |
466 | ||
467 | if (disallowed_sec && wpa_s->current_bss) | |
468 | wpa_bss_tmp_disallow(wpa_s, wpa_s->current_bss->bssid, | |
469 | disallowed_sec); | |
470 | ||
471 | return; | |
472 | fail: | |
473 | wpa_printf(MSG_DEBUG, "MBO IE parsing failed (id=%u len=%u left=%zu)", | |
474 | id, elen, len); | |
475 | } | |
c8082d2b AS |
476 | |
477 | ||
478 | size_t wpas_mbo_ie_bss_trans_reject(struct wpa_supplicant *wpa_s, u8 *pos, | |
479 | size_t len, | |
480 | enum mbo_transition_reject_reason reason) | |
481 | { | |
482 | u8 reject_attr[3]; | |
483 | ||
484 | reject_attr[0] = MBO_ATTR_ID_TRANSITION_REJECT_REASON; | |
485 | reject_attr[1] = 1; | |
486 | reject_attr[2] = reason; | |
487 | ||
488 | return mbo_add_ie(pos, len, reject_attr, sizeof(reject_attr)); | |
489 | } | |
016082e9 AS |
490 | |
491 | ||
492 | void wpas_mbo_update_cell_capa(struct wpa_supplicant *wpa_s, u8 mbo_cell_capa) | |
493 | { | |
494 | u8 cell_capa[7]; | |
495 | ||
496 | if (wpa_s->conf->mbo_cell_capa == mbo_cell_capa) { | |
497 | wpa_printf(MSG_DEBUG, | |
498 | "MBO: Cellular capability already set to %u", | |
499 | mbo_cell_capa); | |
500 | return; | |
501 | } | |
502 | ||
503 | wpa_s->conf->mbo_cell_capa = mbo_cell_capa; | |
504 | ||
505 | cell_capa[0] = WLAN_EID_VENDOR_SPECIFIC; | |
506 | cell_capa[1] = 5; /* Length */ | |
507 | WPA_PUT_BE24(cell_capa + 2, OUI_WFA); | |
508 | cell_capa[5] = MBO_ATTR_ID_CELL_DATA_CAPA; | |
509 | cell_capa[6] = mbo_cell_capa; | |
510 | ||
511 | wpas_mbo_send_wnm_notification(wpa_s, cell_capa, 7); | |
cc9985d1 | 512 | wpa_supplicant_set_default_scan_ies(wpa_s); |
016082e9 | 513 | } |
8f479174 | 514 | |
515 | ||
516 | struct wpabuf * mbo_build_anqp_buf(struct wpa_supplicant *wpa_s, | |
517 | struct wpa_bss *bss) | |
518 | { | |
519 | struct wpabuf *anqp_buf; | |
520 | u8 *len_pos; | |
521 | ||
522 | if (!wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE)) { | |
523 | wpa_printf(MSG_INFO, "MBO: " MACSTR | |
524 | " does not support MBO - cannot request MBO ANQP elements from it", | |
525 | MAC2STR(bss->bssid)); | |
526 | return NULL; | |
527 | } | |
528 | ||
529 | anqp_buf = wpabuf_alloc(10); | |
530 | if (!anqp_buf) | |
531 | return NULL; | |
532 | ||
533 | len_pos = gas_anqp_add_element(anqp_buf, ANQP_VENDOR_SPECIFIC); | |
534 | wpabuf_put_be24(anqp_buf, OUI_WFA); | |
535 | wpabuf_put_u8(anqp_buf, MBO_ANQP_OUI_TYPE); | |
536 | ||
537 | wpabuf_put_u8(anqp_buf, MBO_ANQP_SUBTYPE_CELL_CONN_PREF); | |
538 | gas_anqp_set_element_len(anqp_buf, len_pos); | |
539 | ||
540 | return anqp_buf; | |
541 | } |