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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" | |
17 | #include "config.h" | |
18 | #include "wpa_supplicant_i.h" | |
19 | #include "driver_i.h" | |
20 | #include "bss.h" | |
21 | ||
22 | /* type + length + oui + oui type */ | |
23 | #define MBO_IE_HEADER 6 | |
24 | ||
25 | ||
26 | static int wpas_mbo_validate_non_pref_chan(u8 oper_class, u8 chan, u8 reason) | |
27 | { | |
28 | if (reason > MBO_NON_PREF_CHAN_REASON_INT_INTERFERENCE) | |
29 | return -1; | |
30 | ||
31 | /* Only checking the validity of the channel and oper_class */ | |
32 | if (ieee80211_chan_to_freq(NULL, oper_class, chan) == -1) | |
33 | return -1; | |
34 | ||
35 | return 0; | |
36 | } | |
37 | ||
38 | ||
cb06cf34 DS |
39 | const u8 * wpas_mbo_get_bss_attr(struct wpa_bss *bss, enum mbo_attr_id attr) |
40 | { | |
41 | const u8 *mbo, *end; | |
42 | ||
43 | if (!bss) | |
44 | return NULL; | |
45 | ||
46 | mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE); | |
47 | if (!mbo) | |
48 | return NULL; | |
49 | ||
50 | end = mbo + 2 + mbo[1]; | |
51 | mbo += MBO_IE_HEADER; | |
52 | ||
53 | return get_ie(mbo, end - mbo, attr); | |
54 | } | |
55 | ||
56 | ||
92c6e2e3 DS |
57 | static void wpas_mbo_non_pref_chan_attr_body(struct wpa_supplicant *wpa_s, |
58 | struct wpabuf *mbo, | |
59 | u8 start, u8 end) | |
60 | { | |
61 | u8 i; | |
62 | ||
63 | wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].oper_class); | |
64 | ||
65 | for (i = start; i < end; i++) | |
66 | wpabuf_put_u8(mbo, wpa_s->non_pref_chan[i].chan); | |
67 | ||
68 | wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].preference); | |
69 | wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].reason); | |
70 | wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].reason_detail); | |
71 | } | |
72 | ||
73 | ||
74 | static void wpas_mbo_non_pref_chan_attr(struct wpa_supplicant *wpa_s, | |
75 | struct wpabuf *mbo, u8 start, u8 end) | |
76 | { | |
77 | size_t size = end - start + 4; | |
78 | ||
79 | if (size + 2 > wpabuf_tailroom(mbo)) | |
80 | return; | |
81 | ||
82 | wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT); | |
83 | wpabuf_put_u8(mbo, size); /* Length */ | |
84 | ||
85 | wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end); | |
86 | } | |
87 | ||
88 | ||
2d5b8614 DS |
89 | static void wpas_mbo_non_pref_chan_subelem_hdr(struct wpabuf *mbo, u8 len) |
90 | { | |
91 | wpabuf_put_u8(mbo, WLAN_EID_VENDOR_SPECIFIC); | |
92 | wpabuf_put_u8(mbo, len); /* Length */ | |
93 | wpabuf_put_be24(mbo, OUI_WFA); | |
94 | wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT); | |
95 | } | |
96 | ||
97 | ||
98 | static void wpas_mbo_non_pref_chan_subelement(struct wpa_supplicant *wpa_s, | |
99 | struct wpabuf *mbo, u8 start, | |
100 | u8 end) | |
101 | { | |
102 | size_t size = end - start + 8; | |
103 | ||
104 | if (size + 2 > wpabuf_tailroom(mbo)) | |
105 | return; | |
106 | ||
107 | wpas_mbo_non_pref_chan_subelem_hdr(mbo, size); | |
108 | wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end); | |
109 | } | |
110 | ||
92c6e2e3 | 111 | |
2d5b8614 DS |
112 | static void wpas_mbo_non_pref_chan_attrs(struct wpa_supplicant *wpa_s, |
113 | struct wpabuf *mbo, int subelement) | |
92c6e2e3 DS |
114 | { |
115 | u8 i, start = 0; | |
116 | struct wpa_mbo_non_pref_channel *start_pref; | |
117 | ||
2d5b8614 DS |
118 | if (!wpa_s->non_pref_chan || !wpa_s->non_pref_chan_num) { |
119 | if (subelement) | |
120 | wpas_mbo_non_pref_chan_subelem_hdr(mbo, 4); | |
92c6e2e3 | 121 | return; |
2d5b8614 | 122 | } |
92c6e2e3 DS |
123 | start_pref = &wpa_s->non_pref_chan[0]; |
124 | ||
125 | for (i = 1; i <= wpa_s->non_pref_chan_num; i++) { | |
126 | struct wpa_mbo_non_pref_channel *non_pref = NULL; | |
127 | ||
128 | if (i < wpa_s->non_pref_chan_num) | |
129 | non_pref = &wpa_s->non_pref_chan[i]; | |
130 | if (!non_pref || | |
131 | non_pref->oper_class != start_pref->oper_class || | |
132 | non_pref->reason != start_pref->reason || | |
133 | non_pref->reason_detail != start_pref->reason_detail || | |
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 | |
252 | * preference, reason, and reason detail. To make it easy for the functions that | |
253 | * build the IE attributes and WNM Request subelements, save the channels sorted | |
254 | * by their oper_class, reason, and reason_detail. | |
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; | |
264 | if (a->reason_detail != b->reason_detail) | |
265 | return a->reason_detail - b->reason_detail; | |
266 | return a->preference - b->preference; | |
267 | } | |
268 | ||
269 | ||
270 | int wpas_mbo_update_non_pref_chan(struct wpa_supplicant *wpa_s, | |
271 | const char *non_pref_chan) | |
272 | { | |
273 | char *cmd, *token, *context = NULL; | |
274 | struct wpa_mbo_non_pref_channel *chans = NULL, *tmp_chans; | |
275 | size_t num = 0, size = 0; | |
276 | unsigned i; | |
277 | ||
278 | wpa_printf(MSG_DEBUG, "MBO: Update non-preferred channels, non_pref_chan=%s", | |
279 | non_pref_chan ? non_pref_chan : "N/A"); | |
280 | ||
281 | /* | |
282 | * The shortest channel configuration is 10 characters - commas, 3 | |
283 | * colons, and 4 values that one of them (oper_class) is 2 digits or | |
284 | * more. | |
285 | */ | |
286 | if (!non_pref_chan || os_strlen(non_pref_chan) < 10) | |
287 | goto update; | |
288 | ||
289 | cmd = os_strdup(non_pref_chan); | |
290 | if (!cmd) | |
291 | return -1; | |
292 | ||
293 | while ((token = str_token(cmd, " ", &context))) { | |
294 | struct wpa_mbo_non_pref_channel *chan; | |
295 | int ret; | |
296 | unsigned int _oper_class; | |
297 | unsigned int _chan; | |
298 | unsigned int _preference; | |
299 | unsigned int _reason; | |
300 | unsigned int _reason_detail; | |
301 | ||
302 | if (num == size) { | |
303 | size = size ? size * 2 : 1; | |
304 | tmp_chans = os_realloc_array(chans, size, | |
305 | sizeof(*chans)); | |
306 | if (!tmp_chans) { | |
307 | wpa_printf(MSG_ERROR, | |
308 | "Couldn't reallocate non_pref_chan"); | |
309 | goto fail; | |
310 | } | |
311 | chans = tmp_chans; | |
312 | } | |
313 | ||
314 | chan = &chans[num]; | |
315 | ||
316 | ret = sscanf(token, "%u:%u:%u:%u:%u", &_oper_class, | |
317 | &_chan, &_preference, &_reason, | |
318 | &_reason_detail); | |
319 | if ((ret != 4 && ret != 5) || | |
320 | _oper_class > 255 || _chan > 255 || | |
321 | _preference > 255 || _reason > 65535 || | |
322 | (ret == 5 && _reason_detail > 255)) { | |
323 | wpa_printf(MSG_ERROR, "Invalid non-pref chan input %s", | |
324 | token); | |
325 | goto fail; | |
326 | } | |
327 | chan->oper_class = _oper_class; | |
328 | chan->chan = _chan; | |
329 | chan->preference = _preference; | |
330 | chan->reason = _reason; | |
331 | chan->reason_detail = ret == 4 ? 0 : _reason_detail; | |
332 | ||
333 | if (wpas_mbo_validate_non_pref_chan(chan->oper_class, | |
334 | chan->chan, chan->reason)) { | |
335 | wpa_printf(MSG_ERROR, | |
336 | "Invalid non_pref_chan: oper class %d chan %d reason %d", | |
337 | chan->oper_class, chan->chan, chan->reason); | |
338 | goto fail; | |
339 | } | |
340 | ||
341 | for (i = 0; i < num; i++) | |
342 | if (wpa_non_pref_chan_is_eq(chan, &chans[i])) | |
343 | break; | |
344 | if (i != num) { | |
345 | wpa_printf(MSG_ERROR, | |
346 | "oper class %d chan %d is duplicated", | |
347 | chan->oper_class, chan->chan); | |
348 | goto fail; | |
349 | } | |
350 | ||
351 | num++; | |
352 | } | |
353 | ||
354 | os_free(cmd); | |
355 | ||
356 | if (chans) { | |
357 | qsort(chans, num, sizeof(struct wpa_mbo_non_pref_channel), | |
358 | wpa_non_pref_chan_cmp); | |
359 | } | |
360 | ||
361 | update: | |
362 | os_free(wpa_s->non_pref_chan); | |
363 | wpa_s->non_pref_chan = chans; | |
364 | wpa_s->non_pref_chan_num = num; | |
016082e9 | 365 | wpas_mbo_non_pref_chan_changed(wpa_s); |
92c6e2e3 DS |
366 | |
367 | return 0; | |
368 | ||
369 | fail: | |
370 | os_free(chans); | |
371 | os_free(cmd); | |
372 | return -1; | |
373 | } | |
c5d193d7 DS |
374 | |
375 | ||
376 | void wpas_mbo_scan_ie(struct wpa_supplicant *wpa_s, struct wpabuf *ie) | |
377 | { | |
378 | wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC); | |
379 | wpabuf_put_u8(ie, 7); | |
380 | wpabuf_put_be24(ie, OUI_WFA); | |
381 | wpabuf_put_u8(ie, MBO_OUI_TYPE); | |
382 | ||
383 | wpabuf_put_u8(ie, MBO_ATTR_ID_CELL_DATA_CAPA); | |
384 | wpabuf_put_u8(ie, 1); | |
385 | wpabuf_put_u8(ie, wpa_s->conf->mbo_cell_capa); | |
386 | } | |
5e57ba25 AS |
387 | |
388 | ||
389 | enum chan_allowed { | |
390 | NOT_ALLOWED, ALLOWED | |
391 | }; | |
392 | ||
393 | static enum chan_allowed allow_channel(struct hostapd_hw_modes *mode, u8 chan, | |
394 | unsigned int *flags) | |
395 | { | |
396 | int i; | |
397 | ||
398 | for (i = 0; i < mode->num_channels; i++) { | |
399 | if (mode->channels[i].chan == chan) | |
400 | break; | |
401 | } | |
402 | ||
403 | if (i == mode->num_channels || | |
404 | (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)) | |
405 | return NOT_ALLOWED; | |
406 | ||
407 | if (flags) | |
408 | *flags = mode->channels[i].flag; | |
409 | ||
410 | return ALLOWED; | |
411 | } | |
412 | ||
413 | ||
414 | static int get_center_80mhz(struct hostapd_hw_modes *mode, u8 channel) | |
415 | { | |
416 | u8 center_channels[] = {42, 58, 106, 122, 138, 155}; | |
417 | size_t i; | |
418 | ||
419 | if (mode->mode != HOSTAPD_MODE_IEEE80211A) | |
420 | return 0; | |
421 | ||
422 | for (i = 0; i < ARRAY_SIZE(center_channels); i++) { | |
423 | /* | |
424 | * In 80 MHz, the bandwidth "spans" 12 channels (e.g., 36-48), | |
425 | * so the center channel is 6 channels away from the start/end. | |
426 | */ | |
427 | if (channel >= center_channels[i] - 6 && | |
428 | channel <= center_channels[i] + 6) | |
429 | return center_channels[i]; | |
430 | } | |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
435 | ||
436 | static enum chan_allowed verify_80mhz(struct hostapd_hw_modes *mode, u8 channel) | |
437 | { | |
438 | u8 center_chan; | |
439 | unsigned int i; | |
440 | ||
441 | center_chan = get_center_80mhz(mode, channel); | |
442 | if (!center_chan) | |
443 | return NOT_ALLOWED; | |
444 | ||
445 | /* check all the channels are available */ | |
446 | for (i = 0; i < 4; i++) { | |
447 | unsigned int flags; | |
448 | u8 adj_chan = center_chan - 6 + i * 4; | |
449 | ||
450 | if (allow_channel(mode, adj_chan, &flags) == NOT_ALLOWED) | |
451 | return NOT_ALLOWED; | |
452 | ||
453 | if ((i == 0 && !(flags & HOSTAPD_CHAN_VHT_10_70)) || | |
454 | (i == 1 && !(flags & HOSTAPD_CHAN_VHT_30_50)) || | |
455 | (i == 2 && !(flags & HOSTAPD_CHAN_VHT_50_30)) || | |
456 | (i == 3 && !(flags & HOSTAPD_CHAN_VHT_70_10))) | |
457 | return NOT_ALLOWED; | |
458 | } | |
459 | ||
460 | return ALLOWED; | |
461 | } | |
462 | ||
463 | ||
464 | static int get_center_160mhz(struct hostapd_hw_modes *mode, u8 channel) | |
465 | { | |
466 | u8 center_channels[] = { 50, 114 }; | |
467 | unsigned int i; | |
468 | ||
469 | if (mode->mode != HOSTAPD_MODE_IEEE80211A) | |
470 | return 0; | |
471 | ||
472 | for (i = 0; i < ARRAY_SIZE(center_channels); i++) { | |
473 | /* | |
474 | * In 160 MHz, the bandwidth "spans" 28 channels (e.g., 36-64), | |
475 | * so the center channel is 14 channels away from the start/end. | |
476 | */ | |
477 | if (channel >= center_channels[i] - 14 && | |
478 | channel <= center_channels[i] + 14) | |
479 | return center_channels[i]; | |
480 | } | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | ||
486 | static enum chan_allowed verify_160mhz(struct hostapd_hw_modes *mode, | |
487 | u8 channel) | |
488 | { | |
489 | u8 center_chan; | |
490 | unsigned int i; | |
491 | ||
492 | center_chan = get_center_160mhz(mode, channel); | |
493 | if (!center_chan) | |
494 | return NOT_ALLOWED; | |
495 | ||
496 | /* Check all the channels are available */ | |
497 | for (i = 0; i < 8; i++) { | |
498 | unsigned int flags; | |
499 | u8 adj_chan = center_chan - 14 + i * 4; | |
500 | ||
501 | if (allow_channel(mode, adj_chan, &flags) == NOT_ALLOWED) | |
502 | return NOT_ALLOWED; | |
503 | ||
504 | if ((i == 0 && !(flags & HOSTAPD_CHAN_VHT_10_150)) || | |
505 | (i == 1 && !(flags & HOSTAPD_CHAN_VHT_30_130)) || | |
506 | (i == 2 && !(flags & HOSTAPD_CHAN_VHT_50_110)) || | |
507 | (i == 3 && !(flags & HOSTAPD_CHAN_VHT_70_90)) || | |
508 | (i == 4 && !(flags & HOSTAPD_CHAN_VHT_90_70)) || | |
509 | (i == 5 && !(flags & HOSTAPD_CHAN_VHT_110_50)) || | |
510 | (i == 6 && !(flags & HOSTAPD_CHAN_VHT_130_30)) || | |
511 | (i == 7 && !(flags & HOSTAPD_CHAN_VHT_150_10))) | |
512 | return NOT_ALLOWED; | |
513 | } | |
514 | ||
515 | return ALLOWED; | |
516 | } | |
517 | ||
518 | ||
0558bec1 JM |
519 | static enum chan_allowed verify_channel(struct hostapd_hw_modes *mode, |
520 | u8 channel, u8 bw) | |
5e57ba25 AS |
521 | { |
522 | unsigned int flag = 0; | |
523 | enum chan_allowed res, res2; | |
524 | ||
525 | res2 = res = allow_channel(mode, channel, &flag); | |
526 | if (bw == BW40MINUS) { | |
527 | if (!(flag & HOSTAPD_CHAN_HT40MINUS)) | |
528 | return NOT_ALLOWED; | |
529 | res2 = allow_channel(mode, channel - 4, NULL); | |
530 | } else if (bw == BW40PLUS) { | |
531 | if (!(flag & HOSTAPD_CHAN_HT40PLUS)) | |
532 | return NOT_ALLOWED; | |
533 | res2 = allow_channel(mode, channel + 4, NULL); | |
534 | } else if (bw == BW80) { | |
653d227e JM |
535 | /* |
536 | * channel is a center channel and as such, not necessarily a | |
537 | * valid 20 MHz channels. Override earlier allow_channel() | |
538 | * result and use only the 80 MHz specific version. | |
539 | */ | |
540 | res2 = res = verify_80mhz(mode, channel); | |
5e57ba25 | 541 | } else if (bw == BW160) { |
653d227e JM |
542 | /* |
543 | * channel is a center channel and as such, not necessarily a | |
544 | * valid 20 MHz channels. Override earlier allow_channel() | |
545 | * result and use only the 160 MHz specific version. | |
546 | */ | |
547 | res2 = res = verify_160mhz(mode, channel); | |
548 | } else if (bw == BW80P80) { | |
549 | /* | |
550 | * channel is a center channel and as such, not necessarily a | |
551 | * valid 20 MHz channels. Override earlier allow_channel() | |
552 | * result and use only the 80 MHz specific version. | |
553 | */ | |
554 | res2 = res = verify_80mhz(mode, channel); | |
5e57ba25 AS |
555 | } |
556 | ||
557 | if (res == NOT_ALLOWED || res2 == NOT_ALLOWED) | |
558 | return NOT_ALLOWED; | |
559 | ||
560 | return ALLOWED; | |
561 | } | |
562 | ||
563 | ||
564 | static int wpas_op_class_supported(struct wpa_supplicant *wpa_s, | |
565 | const struct oper_class_map *op_class) | |
566 | { | |
567 | int chan; | |
568 | size_t i; | |
569 | struct hostapd_hw_modes *mode; | |
653d227e | 570 | int found; |
5e57ba25 AS |
571 | |
572 | mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op_class->mode); | |
573 | if (!mode) | |
574 | return 0; | |
575 | ||
653d227e | 576 | if (op_class->op_class == 128) { |
5e57ba25 AS |
577 | u8 channels[] = { 42, 58, 106, 122, 138, 155 }; |
578 | ||
579 | for (i = 0; i < ARRAY_SIZE(channels); i++) { | |
580 | if (verify_channel(mode, channels[i], op_class->bw) == | |
653d227e JM |
581 | ALLOWED) |
582 | return 1; | |
5e57ba25 AS |
583 | } |
584 | ||
653d227e | 585 | return 0; |
5e57ba25 AS |
586 | } |
587 | ||
588 | if (op_class->op_class == 129) { | |
653d227e JM |
589 | /* Check if either 160 MHz channels is allowed */ |
590 | return verify_channel(mode, 50, op_class->bw) == ALLOWED || | |
591 | verify_channel(mode, 114, op_class->bw) == ALLOWED; | |
592 | } | |
593 | ||
594 | if (op_class->op_class == 130) { | |
595 | /* Need at least two non-contiguous 80 MHz segments */ | |
596 | found = 0; | |
597 | ||
598 | if (verify_channel(mode, 42, op_class->bw) == ALLOWED || | |
599 | verify_channel(mode, 58, op_class->bw) == ALLOWED) | |
600 | found++; | |
601 | if (verify_channel(mode, 106, op_class->bw) == ALLOWED || | |
602 | verify_channel(mode, 122, op_class->bw) == ALLOWED || | |
603 | verify_channel(mode, 138, op_class->bw) == ALLOWED) | |
604 | found++; | |
605 | if (verify_channel(mode, 106, op_class->bw) == ALLOWED && | |
606 | verify_channel(mode, 138, op_class->bw) == ALLOWED) | |
607 | found++; | |
608 | if (verify_channel(mode, 155, op_class->bw) == ALLOWED) | |
609 | found++; | |
610 | ||
611 | if (found >= 2) | |
612 | return 1; | |
5e57ba25 | 613 | |
653d227e | 614 | return 0; |
5e57ba25 AS |
615 | } |
616 | ||
653d227e | 617 | found = 0; |
5e57ba25 AS |
618 | for (chan = op_class->min_chan; chan <= op_class->max_chan; |
619 | chan += op_class->inc) { | |
653d227e JM |
620 | if (verify_channel(mode, chan, op_class->bw) == ALLOWED) { |
621 | found = 1; | |
622 | break; | |
623 | } | |
5e57ba25 AS |
624 | } |
625 | ||
653d227e | 626 | return found; |
5e57ba25 AS |
627 | } |
628 | ||
629 | ||
630 | int wpas_mbo_supp_op_class_ie(struct wpa_supplicant *wpa_s, int freq, u8 *pos, | |
631 | size_t len) | |
632 | { | |
633 | struct wpabuf *buf; | |
634 | u8 op, current, chan; | |
635 | u8 *ie_len; | |
636 | int res; | |
637 | ||
638 | /* | |
639 | * Assume 20 MHz channel for now. | |
640 | * TODO: Use the secondary channel and VHT channel width that will be | |
641 | * used after association. | |
642 | */ | |
643 | if (ieee80211_freq_to_channel_ext(freq, 0, VHT_CHANWIDTH_USE_HT, | |
644 | ¤t, &chan) == NUM_HOSTAPD_MODES) | |
645 | return 0; | |
646 | ||
647 | /* | |
648 | * Need 3 bytes for EID, length, and current operating class, plus | |
649 | * 1 byte for every other supported operating class. | |
650 | */ | |
651 | buf = wpabuf_alloc(global_op_class_size + 3); | |
652 | if (!buf) | |
653 | return 0; | |
654 | ||
655 | wpabuf_put_u8(buf, WLAN_EID_SUPPORTED_OPERATING_CLASSES); | |
656 | /* Will set the length later, putting a placeholder */ | |
657 | ie_len = wpabuf_put(buf, 1); | |
658 | wpabuf_put_u8(buf, current); | |
659 | ||
660 | for (op = 0; global_op_class[op].op_class; op++) { | |
661 | if (wpas_op_class_supported(wpa_s, &global_op_class[op])) | |
662 | wpabuf_put_u8(buf, global_op_class[op].op_class); | |
663 | } | |
664 | ||
665 | *ie_len = wpabuf_len(buf) - 2; | |
666 | if (*ie_len < 2 || wpabuf_len(buf) > len) { | |
667 | wpa_printf(MSG_ERROR, | |
668 | "Failed to add supported operating classes IE"); | |
669 | res = 0; | |
670 | } else { | |
671 | os_memcpy(pos, wpabuf_head(buf), wpabuf_len(buf)); | |
672 | res = wpabuf_len(buf); | |
673 | wpa_hexdump_buf(MSG_DEBUG, | |
674 | "MBO: Added supported operating classes IE", | |
675 | buf); | |
676 | } | |
677 | ||
678 | wpabuf_free(buf); | |
679 | return res; | |
680 | } | |
dd599908 AS |
681 | |
682 | ||
683 | void wpas_mbo_ie_trans_req(struct wpa_supplicant *wpa_s, const u8 *mbo_ie, | |
684 | size_t len) | |
685 | { | |
686 | const u8 *pos, *cell_pref = NULL, *reason = NULL; | |
687 | u8 id, elen; | |
688 | u16 disallowed_sec = 0; | |
689 | ||
690 | if (len <= 4 || WPA_GET_BE24(mbo_ie) != OUI_WFA || | |
691 | mbo_ie[3] != MBO_OUI_TYPE) | |
692 | return; | |
693 | ||
694 | pos = mbo_ie + 4; | |
695 | len -= 4; | |
696 | ||
697 | while (len >= 2) { | |
698 | id = *pos++; | |
699 | elen = *pos++; | |
700 | len -= 2; | |
701 | ||
702 | if (elen > len) | |
703 | goto fail; | |
704 | ||
705 | switch (id) { | |
706 | case MBO_ATTR_ID_CELL_DATA_PREF: | |
707 | if (elen != 1) | |
708 | goto fail; | |
709 | ||
710 | if (wpa_s->conf->mbo_cell_capa == | |
711 | MBO_CELL_CAPA_AVAILABLE) | |
712 | cell_pref = pos; | |
713 | else | |
714 | wpa_printf(MSG_DEBUG, | |
715 | "MBO: Station does not support Cellular data connection"); | |
716 | break; | |
717 | case MBO_ATTR_ID_TRANSITION_REASON: | |
718 | if (elen != 1) | |
719 | goto fail; | |
720 | ||
721 | reason = pos; | |
722 | break; | |
723 | case MBO_ATTR_ID_ASSOC_RETRY_DELAY: | |
724 | if (elen != 2) | |
725 | goto fail; | |
726 | ||
727 | if (wpa_s->wnm_mode & | |
728 | WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) { | |
729 | wpa_printf(MSG_DEBUG, | |
730 | "MBO: Unexpected association retry delay, BSS is terminating"); | |
731 | goto fail; | |
732 | } else if (wpa_s->wnm_mode & | |
733 | WNM_BSS_TM_REQ_DISASSOC_IMMINENT) { | |
734 | disallowed_sec = WPA_GET_LE16(pos); | |
735 | } else { | |
736 | wpa_printf(MSG_DEBUG, | |
737 | "MBO: Association retry delay attribute not in disassoc imminent mode"); | |
738 | } | |
739 | ||
740 | break; | |
741 | case MBO_ATTR_ID_AP_CAPA_IND: | |
742 | case MBO_ATTR_ID_NON_PREF_CHAN_REPORT: | |
743 | case MBO_ATTR_ID_CELL_DATA_CAPA: | |
744 | case MBO_ATTR_ID_ASSOC_DISALLOW: | |
745 | case MBO_ATTR_ID_TRANSITION_REJECT_REASON: | |
746 | wpa_printf(MSG_DEBUG, | |
747 | "MBO: Attribute %d should not be included in BTM Request frame", | |
748 | id); | |
749 | break; | |
750 | default: | |
751 | wpa_printf(MSG_DEBUG, "MBO: Unknown attribute id %u", | |
752 | id); | |
753 | return; | |
754 | } | |
755 | ||
756 | pos += elen; | |
757 | len -= elen; | |
758 | } | |
759 | ||
760 | if (cell_pref) | |
761 | wpa_msg(wpa_s, MSG_INFO, MBO_CELL_PREFERENCE "preference=%u", | |
762 | *cell_pref); | |
763 | ||
764 | if (reason) | |
765 | wpa_msg(wpa_s, MSG_INFO, MBO_TRANSITION_REASON "reason=%u", | |
766 | *reason); | |
767 | ||
768 | if (disallowed_sec && wpa_s->current_bss) | |
769 | wpa_bss_tmp_disallow(wpa_s, wpa_s->current_bss->bssid, | |
770 | disallowed_sec); | |
771 | ||
772 | return; | |
773 | fail: | |
774 | wpa_printf(MSG_DEBUG, "MBO IE parsing failed (id=%u len=%u left=%zu)", | |
775 | id, elen, len); | |
776 | } | |
c8082d2b AS |
777 | |
778 | ||
779 | size_t wpas_mbo_ie_bss_trans_reject(struct wpa_supplicant *wpa_s, u8 *pos, | |
780 | size_t len, | |
781 | enum mbo_transition_reject_reason reason) | |
782 | { | |
783 | u8 reject_attr[3]; | |
784 | ||
785 | reject_attr[0] = MBO_ATTR_ID_TRANSITION_REJECT_REASON; | |
786 | reject_attr[1] = 1; | |
787 | reject_attr[2] = reason; | |
788 | ||
789 | return mbo_add_ie(pos, len, reject_attr, sizeof(reject_attr)); | |
790 | } | |
016082e9 AS |
791 | |
792 | ||
793 | void wpas_mbo_update_cell_capa(struct wpa_supplicant *wpa_s, u8 mbo_cell_capa) | |
794 | { | |
795 | u8 cell_capa[7]; | |
796 | ||
797 | if (wpa_s->conf->mbo_cell_capa == mbo_cell_capa) { | |
798 | wpa_printf(MSG_DEBUG, | |
799 | "MBO: Cellular capability already set to %u", | |
800 | mbo_cell_capa); | |
801 | return; | |
802 | } | |
803 | ||
804 | wpa_s->conf->mbo_cell_capa = mbo_cell_capa; | |
805 | ||
806 | cell_capa[0] = WLAN_EID_VENDOR_SPECIFIC; | |
807 | cell_capa[1] = 5; /* Length */ | |
808 | WPA_PUT_BE24(cell_capa + 2, OUI_WFA); | |
809 | cell_capa[5] = MBO_ATTR_ID_CELL_DATA_CAPA; | |
810 | cell_capa[6] = mbo_cell_capa; | |
811 | ||
812 | wpas_mbo_send_wnm_notification(wpa_s, cell_capa, 7); | |
813 | } |