1 /*
2 * Common hostapd/wpa_supplicant HW features
3 * Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2015, Qualcomm Atheros, Inc.
5 *
6 * This software may be distributed under the terms of the BSD license.
7 * See README for more details.
8 */
9
10 #include "includes.h"
11
12 #include "common.h"
13 #include "defs.h"
14 #include "ieee802_11_defs.h"
15 #include "ieee802_11_common.h"
16 #include "hw_features_common.h"
17
18
hw_get_channel_chan(struct hostapd_hw_modes * mode,int chan,int * freq)19 struct hostapd_channel_data * hw_get_channel_chan(struct hostapd_hw_modes *mode,
20 int chan, int *freq)
21 {
22 int i;
23
24 if (freq)
25 *freq = 0;
26
27 if (!mode)
28 return NULL;
29
30 for (i = 0; i < mode->num_channels; i++) {
31 struct hostapd_channel_data *ch = &mode->channels[i];
32 if (ch->chan == chan) {
33 if (freq)
34 *freq = ch->freq;
35 return ch;
36 }
37 }
38
39 return NULL;
40 }
41
42
43 struct hostapd_channel_data *
hw_mode_get_channel(struct hostapd_hw_modes * mode,int freq,int * chan)44 hw_mode_get_channel(struct hostapd_hw_modes *mode, int freq, int *chan)
45 {
46 int i;
47
48 for (i = 0; i < mode->num_channels; i++) {
49 struct hostapd_channel_data *ch = &mode->channels[i];
50
51 if (ch->freq == freq) {
52 if (chan)
53 *chan = ch->chan;
54 return ch;
55 }
56 }
57
58 return NULL;
59 }
60
61
62 struct hostapd_channel_data *
hw_get_channel_freq(enum hostapd_hw_mode mode,int freq,int * chan,struct hostapd_hw_modes * hw_features,int num_hw_features)63 hw_get_channel_freq(enum hostapd_hw_mode mode, int freq, int *chan,
64 struct hostapd_hw_modes *hw_features, int num_hw_features)
65 {
66 struct hostapd_channel_data *chan_data;
67 int i;
68
69 if (chan)
70 *chan = 0;
71
72 if (!hw_features)
73 return NULL;
74
75 for (i = 0; i < num_hw_features; i++) {
76 struct hostapd_hw_modes *curr_mode = &hw_features[i];
77
78 if (curr_mode->mode != mode)
79 continue;
80
81 chan_data = hw_mode_get_channel(curr_mode, freq, chan);
82 if (chan_data)
83 return chan_data;
84 }
85
86 return NULL;
87 }
88
89
hw_get_freq(struct hostapd_hw_modes * mode,int chan)90 int hw_get_freq(struct hostapd_hw_modes *mode, int chan)
91 {
92 int freq;
93
94 hw_get_channel_chan(mode, chan, &freq);
95
96 return freq;
97 }
98
99
hw_get_chan(enum hostapd_hw_mode mode,int freq,struct hostapd_hw_modes * hw_features,int num_hw_features)100 int hw_get_chan(enum hostapd_hw_mode mode, int freq,
101 struct hostapd_hw_modes *hw_features, int num_hw_features)
102 {
103 int chan;
104
105 hw_get_channel_freq(mode, freq, &chan, hw_features, num_hw_features);
106
107 return chan;
108 }
109
110
allowed_ht40_channel_pair(enum hostapd_hw_mode mode,struct hostapd_channel_data * p_chan,struct hostapd_channel_data * s_chan)111 int allowed_ht40_channel_pair(enum hostapd_hw_mode mode,
112 struct hostapd_channel_data *p_chan,
113 struct hostapd_channel_data *s_chan)
114 {
115 int ok, first;
116 int allowed[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 140,
117 149, 157, 165, 173, 184, 192 };
118 size_t k;
119 int ht40_plus, pri_chan, sec_chan;
120
121 if (!p_chan || !s_chan)
122 return 0;
123 pri_chan = p_chan->chan;
124 sec_chan = s_chan->chan;
125
126 ht40_plus = pri_chan < sec_chan;
127
128 if (pri_chan == sec_chan || !sec_chan) {
129 if (chan_pri_allowed(p_chan))
130 return 1; /* HT40 not used */
131
132 wpa_printf(MSG_ERROR, "Channel %d is not allowed as primary",
133 pri_chan);
134 return 0;
135 }
136
137 wpa_printf(MSG_DEBUG,
138 "HT40: control channel: %d (%d MHz), secondary channel: %d (%d MHz)",
139 pri_chan, p_chan->freq, sec_chan, s_chan->freq);
140
141 /* Verify that HT40 secondary channel is an allowed 20 MHz
142 * channel */
143 if ((s_chan->flag & HOSTAPD_CHAN_DISABLED) ||
144 (ht40_plus && !(p_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40P)) ||
145 (!ht40_plus && !(p_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40M))) {
146 wpa_printf(MSG_ERROR, "HT40 secondary channel %d not allowed",
147 sec_chan);
148 return 0;
149 }
150
151 /*
152 * Verify that HT40 primary,secondary channel pair is allowed per
153 * IEEE 802.11n Annex J. This is only needed for 5 GHz band since
154 * 2.4 GHz rules allow all cases where the secondary channel fits into
155 * the list of allowed channels (already checked above).
156 */
157 if (mode != HOSTAPD_MODE_IEEE80211A)
158 return 1;
159
160 first = pri_chan < sec_chan ? pri_chan : sec_chan;
161
162 ok = 0;
163 for (k = 0; k < ARRAY_SIZE(allowed); k++) {
164 if (first == allowed[k]) {
165 ok = 1;
166 break;
167 }
168 }
169 if (!ok) {
170 wpa_printf(MSG_ERROR, "HT40 channel pair (%d, %d) not allowed",
171 pri_chan, sec_chan);
172 return 0;
173 }
174
175 return 1;
176 }
177
178
get_pri_sec_chan(struct wpa_scan_res * bss,int * pri_chan,int * sec_chan)179 void get_pri_sec_chan(struct wpa_scan_res *bss, int *pri_chan, int *sec_chan)
180 {
181 struct ieee80211_ht_operation *oper;
182 struct ieee802_11_elems elems;
183
184 *pri_chan = *sec_chan = 0;
185
186 ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0);
187 if (elems.ht_operation) {
188 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
189 *pri_chan = oper->primary_chan;
190 if (oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) {
191 int sec = oper->ht_param &
192 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
193 if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
194 *sec_chan = *pri_chan + 4;
195 else if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
196 *sec_chan = *pri_chan - 4;
197 }
198 }
199 }
200
201
check_40mhz_5g(struct wpa_scan_results * scan_res,struct hostapd_channel_data * pri_chan,struct hostapd_channel_data * sec_chan)202 int check_40mhz_5g(struct wpa_scan_results *scan_res,
203 struct hostapd_channel_data *pri_chan,
204 struct hostapd_channel_data *sec_chan)
205 {
206 int pri_bss, sec_bss;
207 int bss_pri_chan, bss_sec_chan;
208 size_t i;
209 int match;
210
211 if (!scan_res || !pri_chan || !sec_chan ||
212 pri_chan->freq == sec_chan->freq)
213 return 0;
214
215 /*
216 * Switch PRI/SEC channels if Beacons were detected on selected SEC
217 * channel, but not on selected PRI channel.
218 */
219 pri_bss = sec_bss = 0;
220 for (i = 0; i < scan_res->num; i++) {
221 struct wpa_scan_res *bss = scan_res->res[i];
222 if (bss->freq == pri_chan->freq)
223 pri_bss++;
224 else if (bss->freq == sec_chan->freq)
225 sec_bss++;
226 }
227 if (sec_bss && !pri_bss) {
228 wpa_printf(MSG_INFO,
229 "Switch own primary and secondary channel to get secondary channel with no Beacons from other BSSes");
230 return 2;
231 }
232
233 /*
234 * Match PRI/SEC channel with any existing HT40 BSS on the same
235 * channels that we are about to use (if already mixed order in
236 * existing BSSes, use own preference).
237 */
238 match = 0;
239 for (i = 0; i < scan_res->num; i++) {
240 struct wpa_scan_res *bss = scan_res->res[i];
241 get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan);
242 if (pri_chan->chan == bss_pri_chan &&
243 sec_chan->chan == bss_sec_chan) {
244 match = 1;
245 break;
246 }
247 }
248 if (!match) {
249 for (i = 0; i < scan_res->num; i++) {
250 struct wpa_scan_res *bss = scan_res->res[i];
251 get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan);
252 if (pri_chan->chan == bss_sec_chan &&
253 sec_chan->chan == bss_pri_chan) {
254 wpa_printf(MSG_INFO, "Switch own primary and "
255 "secondary channel due to BSS "
256 "overlap with " MACSTR,
257 MAC2STR(bss->bssid));
258 return 2;
259 }
260 }
261 }
262
263 return 1;
264 }
265
266
check_20mhz_bss(struct wpa_scan_res * bss,int pri_freq,int start,int end)267 static int check_20mhz_bss(struct wpa_scan_res *bss, int pri_freq, int start,
268 int end)
269 {
270 struct ieee802_11_elems elems;
271 struct ieee80211_ht_operation *oper;
272
273 if (bss->freq < start || bss->freq > end || bss->freq == pri_freq)
274 return 0;
275
276 ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0);
277 if (!elems.ht_capabilities) {
278 wpa_printf(MSG_DEBUG, "Found overlapping legacy BSS: "
279 MACSTR " freq=%d", MAC2STR(bss->bssid), bss->freq);
280 return 1;
281 }
282
283 if (elems.ht_operation) {
284 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
285 if (oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)
286 return 0;
287
288 wpa_printf(MSG_DEBUG, "Found overlapping 20 MHz HT BSS: "
289 MACSTR " freq=%d", MAC2STR(bss->bssid), bss->freq);
290 return 1;
291 }
292 return 0;
293 }
294
295
check_40mhz_2g4(struct hostapd_hw_modes * mode,struct wpa_scan_results * scan_res,int pri_chan,int sec_chan)296 int check_40mhz_2g4(struct hostapd_hw_modes *mode,
297 struct wpa_scan_results *scan_res, int pri_chan,
298 int sec_chan)
299 {
300 int pri_freq, sec_freq;
301 int affected_start, affected_end;
302 size_t i;
303
304 if (!mode || !scan_res || !pri_chan || !sec_chan ||
305 pri_chan == sec_chan)
306 return 0;
307
308 pri_freq = hw_get_freq(mode, pri_chan);
309 sec_freq = hw_get_freq(mode, sec_chan);
310
311 affected_start = (pri_freq + sec_freq) / 2 - 25;
312 affected_end = (pri_freq + sec_freq) / 2 + 25;
313 wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
314 affected_start, affected_end);
315 for (i = 0; i < scan_res->num; i++) {
316 struct wpa_scan_res *bss = scan_res->res[i];
317 int pri = bss->freq;
318 int sec = pri;
319 struct ieee802_11_elems elems;
320
321 /* Check for overlapping 20 MHz BSS */
322 if (check_20mhz_bss(bss, pri_freq, affected_start,
323 affected_end)) {
324 wpa_printf(MSG_DEBUG,
325 "Overlapping 20 MHz BSS is found");
326 return 0;
327 }
328
329 get_pri_sec_chan(bss, &pri_chan, &sec_chan);
330
331 if (sec_chan) {
332 if (sec_chan < pri_chan)
333 sec = pri - 20;
334 else
335 sec = pri + 20;
336 }
337
338 if ((pri < affected_start || pri > affected_end) &&
339 (sec < affected_start || sec > affected_end))
340 continue; /* not within affected channel range */
341
342 wpa_printf(MSG_DEBUG, "Neighboring BSS: " MACSTR
343 " freq=%d pri=%d sec=%d",
344 MAC2STR(bss->bssid), bss->freq, pri_chan, sec_chan);
345
346 if (sec_chan) {
347 if (pri_freq != pri || sec_freq != sec) {
348 wpa_printf(MSG_DEBUG,
349 "40 MHz pri/sec mismatch with BSS "
350 MACSTR
351 " <%d,%d> (chan=%d%c) vs. <%d,%d>",
352 MAC2STR(bss->bssid),
353 pri, sec, pri_chan,
354 sec > pri ? '+' : '-',
355 pri_freq, sec_freq);
356 return 0;
357 }
358 }
359
360 ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems,
361 0);
362 if (elems.ht_capabilities) {
363 struct ieee80211_ht_capabilities *ht_cap =
364 (struct ieee80211_ht_capabilities *)
365 elems.ht_capabilities;
366
367 if (le_to_host16(ht_cap->ht_capabilities_info) &
368 HT_CAP_INFO_40MHZ_INTOLERANT) {
369 wpa_printf(MSG_DEBUG,
370 "40 MHz Intolerant is set on channel %d in BSS "
371 MACSTR, pri, MAC2STR(bss->bssid));
372 return 0;
373 }
374 }
375 }
376
377 return 1;
378 }
379
380
hostapd_set_freq_params(struct hostapd_freq_params * data,enum hostapd_hw_mode mode,int freq,int channel,int enable_edmg,u8 edmg_channel,int ht_enabled,int vht_enabled,int he_enabled,bool eht_enabled,int sec_channel_offset,enum oper_chan_width oper_chwidth,int center_segment0,int center_segment1,u32 vht_caps,struct he_capabilities * he_cap,struct eht_capabilities * eht_cap)381 int hostapd_set_freq_params(struct hostapd_freq_params *data,
382 enum hostapd_hw_mode mode,
383 int freq, int channel, int enable_edmg,
384 u8 edmg_channel, int ht_enabled,
385 int vht_enabled, int he_enabled,
386 bool eht_enabled, int sec_channel_offset,
387 enum oper_chan_width oper_chwidth,
388 int center_segment0,
389 int center_segment1, u32 vht_caps,
390 struct he_capabilities *he_cap,
391 struct eht_capabilities *eht_cap)
392 {
393 if (!he_cap || !he_cap->he_supported)
394 he_enabled = 0;
395 if (!eht_cap || !eht_cap->eht_supported)
396 eht_enabled = 0;
397 os_memset(data, 0, sizeof(*data));
398 data->mode = mode;
399 data->freq = freq;
400 data->channel = channel;
401 data->ht_enabled = ht_enabled;
402 data->vht_enabled = vht_enabled;
403 data->he_enabled = he_enabled;
404 data->eht_enabled = eht_enabled;
405 data->sec_channel_offset = sec_channel_offset;
406 data->center_freq1 = freq + sec_channel_offset * 10;
407 data->center_freq2 = 0;
408 if (oper_chwidth == CONF_OPER_CHWIDTH_80MHZ)
409 data->bandwidth = 80;
410 else if (oper_chwidth == CONF_OPER_CHWIDTH_160MHZ ||
411 oper_chwidth == CONF_OPER_CHWIDTH_80P80MHZ)
412 data->bandwidth = 160;
413 else if (oper_chwidth == CONF_OPER_CHWIDTH_320MHZ)
414 data->bandwidth = 320;
415 else if (sec_channel_offset)
416 data->bandwidth = 40;
417 else
418 data->bandwidth = 20;
419
420
421 hostapd_encode_edmg_chan(enable_edmg, edmg_channel, channel,
422 &data->edmg);
423
424 if (is_6ghz_freq(freq)) {
425 if (!data->he_enabled && !data->eht_enabled) {
426 wpa_printf(MSG_ERROR,
427 "Can't set 6 GHz mode - HE or EHT aren't enabled");
428 return -1;
429 }
430
431 if (center_idx_to_bw_6ghz(channel) < 0) {
432 wpa_printf(MSG_ERROR,
433 "Invalid control channel for 6 GHz band");
434 return -1;
435 }
436
437 if (!center_segment0) {
438 if (center_segment1) {
439 wpa_printf(MSG_ERROR,
440 "Segment 0 center frequency isn't set");
441 return -1;
442 }
443 if (!sec_channel_offset)
444 data->center_freq1 = data->freq;
445 } else {
446 int freq1, freq2 = 0;
447 int bw = center_idx_to_bw_6ghz(center_segment0);
448
449 if (bw < 0) {
450 wpa_printf(MSG_ERROR,
451 "Invalid center frequency index for 6 GHz");
452 return -1;
453 }
454
455 freq1 = ieee80211_chan_to_freq(NULL, 131,
456 center_segment0);
457 if (freq1 < 0) {
458 wpa_printf(MSG_ERROR,
459 "Invalid segment 0 center frequency for 6 GHz");
460 return -1;
461 }
462
463 if (center_segment1) {
464 if (center_idx_to_bw_6ghz(center_segment1) != 2 ||
465 bw != 2) {
466 wpa_printf(MSG_ERROR,
467 "6 GHz 80+80 MHz configuration doesn't use valid 80 MHz channels");
468 return -1;
469 }
470
471 freq2 = ieee80211_chan_to_freq(NULL, 131,
472 center_segment1);
473 if (freq2 < 0) {
474 wpa_printf(MSG_ERROR,
475 "Invalid segment 1 center frequency for UHB");
476 return -1;
477 }
478 }
479
480 data->bandwidth = (1 << (u8) bw) * 20;
481 data->center_freq1 = freq1;
482 data->center_freq2 = freq2;
483 }
484 data->ht_enabled = 0;
485 data->vht_enabled = 0;
486
487 return 0;
488 }
489
490 if (data->eht_enabled) switch (oper_chwidth) {
491 case CONF_OPER_CHWIDTH_320MHZ:
492 if (!(eht_cap->phy_cap[EHT_PHYCAP_320MHZ_IN_6GHZ_SUPPORT_IDX] &
493 EHT_PHYCAP_320MHZ_IN_6GHZ_SUPPORT_MASK)) {
494 wpa_printf(MSG_ERROR,
495 "320 MHz channel width is not supported in 5 or 6 GHz");
496 return -1;
497 }
498 break;
499 default:
500 break;
501 }
502
503 if (data->he_enabled || data->eht_enabled) switch (oper_chwidth) {
504 case CONF_OPER_CHWIDTH_USE_HT:
505 if (sec_channel_offset == 0)
506 break;
507
508 if (mode == HOSTAPD_MODE_IEEE80211G) {
509 if (he_cap &&
510 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
511 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_IN_2G)) {
512 wpa_printf(MSG_ERROR,
513 "40 MHz channel width is not supported in 2.4 GHz");
514 return -1;
515 }
516 break;
517 }
518 /* fall through */
519 case CONF_OPER_CHWIDTH_80MHZ:
520 if (mode == HOSTAPD_MODE_IEEE80211A) {
521 if (he_cap &&
522 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
523 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) {
524 wpa_printf(MSG_ERROR,
525 "40/80 MHz channel width is not supported in 5/6 GHz");
526 return -1;
527 }
528 }
529 break;
530 case CONF_OPER_CHWIDTH_80P80MHZ:
531 if (he_cap &&
532 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
533 HE_PHYCAP_CHANNEL_WIDTH_SET_80PLUS80MHZ_IN_5G)) {
534 wpa_printf(MSG_ERROR,
535 "80+80 MHz channel width is not supported in 5/6 GHz");
536 return -1;
537 }
538 break;
539 case CONF_OPER_CHWIDTH_160MHZ:
540 if (he_cap &&
541 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
542 HE_PHYCAP_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) {
543 wpa_printf(MSG_ERROR,
544 "160 MHz channel width is not supported in 5 / 6GHz");
545 return -1;
546 }
547 break;
548 default:
549 break;
550 } else if (data->vht_enabled) switch (oper_chwidth) {
551 case CONF_OPER_CHWIDTH_USE_HT:
552 break;
553 case CONF_OPER_CHWIDTH_80P80MHZ:
554 if (!(vht_caps & VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)) {
555 wpa_printf(MSG_ERROR,
556 "80+80 channel width is not supported!");
557 return -1;
558 }
559 /* fall through */
560 case CONF_OPER_CHWIDTH_80MHZ:
561 break;
562 case CONF_OPER_CHWIDTH_160MHZ:
563 if (!(vht_caps & (VHT_CAP_SUPP_CHAN_WIDTH_160MHZ |
564 VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) {
565 wpa_printf(MSG_ERROR,
566 "160 MHz channel width is not supported!");
567 return -1;
568 }
569 break;
570 default:
571 break;
572 }
573
574 if (data->eht_enabled || data->he_enabled ||
575 data->vht_enabled) switch (oper_chwidth) {
576 case CONF_OPER_CHWIDTH_USE_HT:
577 if (center_segment1 ||
578 (center_segment0 != 0 &&
579 5000 + center_segment0 * 5 != data->center_freq1 &&
580 2407 + center_segment0 * 5 != data->center_freq1)) {
581 wpa_printf(MSG_ERROR,
582 "20/40 MHz: center segment 0 (=%d) and center freq 1 (=%d) not in sync",
583 center_segment0, data->center_freq1);
584 return -1;
585 }
586 break;
587 case CONF_OPER_CHWIDTH_80P80MHZ:
588 if (center_segment1 == center_segment0 + 4 ||
589 center_segment1 == center_segment0 - 4) {
590 wpa_printf(MSG_ERROR,
591 "80+80 MHz: center segment 1 only 20 MHz apart");
592 return -1;
593 }
594 data->center_freq2 = 5000 + center_segment1 * 5;
595 /* fall through */
596 case CONF_OPER_CHWIDTH_80MHZ:
597 data->bandwidth = 80;
598 if (!sec_channel_offset) {
599 wpa_printf(MSG_ERROR,
600 "80/80+80 MHz: no second channel offset");
601 return -1;
602 }
603 if (oper_chwidth == CONF_OPER_CHWIDTH_80MHZ &&
604 center_segment1) {
605 wpa_printf(MSG_ERROR,
606 "80 MHz: center segment 1 configured");
607 return -1;
608 }
609 if (oper_chwidth == CONF_OPER_CHWIDTH_80P80MHZ &&
610 !center_segment1) {
611 wpa_printf(MSG_ERROR,
612 "80+80 MHz: center segment 1 not configured");
613 return -1;
614 }
615 if (!center_segment0) {
616 if (channel <= 48)
617 center_segment0 = 42;
618 else if (channel <= 64)
619 center_segment0 = 58;
620 else if (channel <= 112)
621 center_segment0 = 106;
622 else if (channel <= 128)
623 center_segment0 = 122;
624 else if (channel <= 144)
625 center_segment0 = 138;
626 else if (channel <= 161)
627 center_segment0 = 155;
628 else if (channel <= 177)
629 center_segment0 = 171;
630 data->center_freq1 = 5000 + center_segment0 * 5;
631 } else {
632 /*
633 * Note: HT/VHT config and params are coupled. Check if
634 * HT40 channel band is in VHT80 Pri channel band
635 * configuration.
636 */
637 if (center_segment0 == channel + 6 ||
638 center_segment0 == channel + 2 ||
639 center_segment0 == channel - 2 ||
640 center_segment0 == channel - 6)
641 data->center_freq1 = 5000 + center_segment0 * 5;
642 else {
643 wpa_printf(MSG_ERROR,
644 "Wrong coupling between HT and VHT/HE channel setting");
645 return -1;
646 }
647 }
648 break;
649 case CONF_OPER_CHWIDTH_160MHZ:
650 data->bandwidth = 160;
651 if (center_segment1) {
652 wpa_printf(MSG_ERROR,
653 "160 MHz: center segment 1 should not be set");
654 return -1;
655 }
656 if (!sec_channel_offset) {
657 wpa_printf(MSG_ERROR,
658 "160 MHz: second channel offset not set");
659 return -1;
660 }
661 /*
662 * Note: HT/VHT config and params are coupled. Check if
663 * HT40 channel band is in VHT160 channel band configuration.
664 */
665 if (center_segment0 == channel + 14 ||
666 center_segment0 == channel + 10 ||
667 center_segment0 == channel + 6 ||
668 center_segment0 == channel + 2 ||
669 center_segment0 == channel - 2 ||
670 center_segment0 == channel - 6 ||
671 center_segment0 == channel - 10 ||
672 center_segment0 == channel - 14)
673 data->center_freq1 = 5000 + center_segment0 * 5;
674 else {
675 wpa_printf(MSG_ERROR,
676 "160 MHz: HT40 channel band is not in 160 MHz band");
677 return -1;
678 }
679 break;
680 case CONF_OPER_CHWIDTH_320MHZ:
681 data->bandwidth = 320;
682 if (!data->eht_enabled || !is_6ghz_freq(freq)) {
683 wpa_printf(MSG_ERROR,
684 "320 MHz: EHT not enabled or not a 6 GHz channel");
685 return -1;
686 }
687 if (center_segment1) {
688 wpa_printf(MSG_ERROR,
689 "320 MHz: center segment 1 should not be set");
690 return -1;
691 }
692 if (center_segment0 == channel + 30 ||
693 center_segment0 == channel + 26 ||
694 center_segment0 == channel + 22 ||
695 center_segment0 == channel + 18 ||
696 center_segment0 == channel + 14 ||
697 center_segment0 == channel + 10 ||
698 center_segment0 == channel + 6 ||
699 center_segment0 == channel + 2 ||
700 center_segment0 == channel - 2 ||
701 center_segment0 == channel - 6 ||
702 center_segment0 == channel - 10 ||
703 center_segment0 == channel - 14 ||
704 center_segment0 == channel - 18 ||
705 center_segment0 == channel - 22 ||
706 center_segment0 == channel - 26 ||
707 center_segment0 == channel - 30)
708 data->center_freq1 = 5000 + center_segment0 * 5;
709 else {
710 wpa_printf(MSG_ERROR,
711 "320 MHz: wrong center segment 0");
712 return -1;
713 }
714 break;
715 default:
716 break;
717 }
718
719 return 0;
720 }
721
722
set_disable_ht40(struct ieee80211_ht_capabilities * htcaps,int disabled)723 void set_disable_ht40(struct ieee80211_ht_capabilities *htcaps,
724 int disabled)
725 {
726 /* Masking these out disables HT40 */
727 le16 msk = host_to_le16(HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET |
728 HT_CAP_INFO_SHORT_GI40MHZ);
729
730 if (disabled)
731 htcaps->ht_capabilities_info &= ~msk;
732 else
733 htcaps->ht_capabilities_info |= msk;
734 }
735
736
737 #ifdef CONFIG_IEEE80211AC
738
_ieee80211ac_cap_check(u32 hw,u32 conf,u32 cap,const char * name)739 static int _ieee80211ac_cap_check(u32 hw, u32 conf, u32 cap,
740 const char *name)
741 {
742 u32 req_cap = conf & cap;
743
744 /*
745 * Make sure we support all requested capabilities.
746 * NOTE: We assume that 'cap' represents a capability mask,
747 * not a discrete value.
748 */
749 if ((hw & req_cap) != req_cap) {
750 wpa_printf(MSG_ERROR,
751 "Driver does not support configured VHT capability [%s]",
752 name);
753 return 0;
754 }
755 return 1;
756 }
757
758
ieee80211ac_cap_check_max(u32 hw,u32 conf,u32 mask,unsigned int shift,const char * name)759 static int ieee80211ac_cap_check_max(u32 hw, u32 conf, u32 mask,
760 unsigned int shift,
761 const char *name)
762 {
763 u32 hw_max = hw & mask;
764 u32 conf_val = conf & mask;
765
766 if (conf_val > hw_max) {
767 wpa_printf(MSG_ERROR,
768 "Configured VHT capability [%s] exceeds max value supported by the driver (%d > %d)",
769 name, conf_val >> shift, hw_max >> shift);
770 return 0;
771 }
772 return 1;
773 }
774
775
ieee80211ac_cap_check(u32 hw,u32 conf)776 int ieee80211ac_cap_check(u32 hw, u32 conf)
777 {
778 #define VHT_CAP_CHECK(cap) \
779 do { \
780 if (!_ieee80211ac_cap_check(hw, conf, cap, #cap)) \
781 return 0; \
782 } while (0)
783
784 #define VHT_CAP_CHECK_MAX(cap) \
785 do { \
786 if (!ieee80211ac_cap_check_max(hw, conf, cap, cap ## _SHIFT, \
787 #cap)) \
788 return 0; \
789 } while (0)
790
791 VHT_CAP_CHECK_MAX(VHT_CAP_MAX_MPDU_LENGTH_MASK);
792 VHT_CAP_CHECK_MAX(VHT_CAP_SUPP_CHAN_WIDTH_MASK);
793 VHT_CAP_CHECK(VHT_CAP_RXLDPC);
794 VHT_CAP_CHECK(VHT_CAP_SHORT_GI_80);
795 VHT_CAP_CHECK(VHT_CAP_SHORT_GI_160);
796 VHT_CAP_CHECK(VHT_CAP_TXSTBC);
797 VHT_CAP_CHECK_MAX(VHT_CAP_RXSTBC_MASK);
798 VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMER_CAPABLE);
799 VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMEE_CAPABLE);
800 VHT_CAP_CHECK_MAX(VHT_CAP_BEAMFORMEE_STS_MAX);
801 VHT_CAP_CHECK_MAX(VHT_CAP_SOUNDING_DIMENSION_MAX);
802 VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMER_CAPABLE);
803 VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMEE_CAPABLE);
804 VHT_CAP_CHECK(VHT_CAP_VHT_TXOP_PS);
805 VHT_CAP_CHECK(VHT_CAP_HTC_VHT);
806 VHT_CAP_CHECK_MAX(VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MAX);
807 VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB);
808 VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB);
809 VHT_CAP_CHECK(VHT_CAP_RX_ANTENNA_PATTERN);
810 VHT_CAP_CHECK(VHT_CAP_TX_ANTENNA_PATTERN);
811
812 #undef VHT_CAP_CHECK
813 #undef VHT_CAP_CHECK_MAX
814
815 return 1;
816 }
817
818 #endif /* CONFIG_IEEE80211AC */
819
820
num_chan_to_bw(int num_chans)821 u32 num_chan_to_bw(int num_chans)
822 {
823 switch (num_chans) {
824 case 2:
825 case 4:
826 case 8:
827 case 16:
828 return num_chans * 20;
829 default:
830 return 20;
831 }
832 }
833
834
835 /* check if BW is applicable for channel */
chan_bw_allowed(const struct hostapd_channel_data * chan,u32 bw,int ht40_plus,int pri)836 int chan_bw_allowed(const struct hostapd_channel_data *chan, u32 bw,
837 int ht40_plus, int pri)
838 {
839 u32 bw_mask;
840
841 switch (bw) {
842 case 20:
843 bw_mask = HOSTAPD_CHAN_WIDTH_20;
844 break;
845 case 40:
846 /* HT 40 MHz support declared only for primary channel,
847 * just skip 40 MHz secondary checking */
848 if (pri && ht40_plus)
849 bw_mask = HOSTAPD_CHAN_WIDTH_40P;
850 else if (pri && !ht40_plus)
851 bw_mask = HOSTAPD_CHAN_WIDTH_40M;
852 else
853 bw_mask = 0;
854 break;
855 case 80:
856 bw_mask = HOSTAPD_CHAN_WIDTH_80;
857 break;
858 case 160:
859 bw_mask = HOSTAPD_CHAN_WIDTH_160;
860 break;
861 case 320:
862 bw_mask = HOSTAPD_CHAN_WIDTH_320;
863 break;
864 default:
865 bw_mask = 0;
866 break;
867 }
868
869 return (chan->allowed_bw & bw_mask) == bw_mask;
870 }
871
872
873 /* check if channel is allowed to be used as primary */
chan_pri_allowed(const struct hostapd_channel_data * chan)874 int chan_pri_allowed(const struct hostapd_channel_data *chan)
875 {
876 return !(chan->flag & HOSTAPD_CHAN_DISABLED) &&
877 (chan->allowed_bw & HOSTAPD_CHAN_WIDTH_20);
878 }
879
880
881 /* IEEE P802.11be/D3.0, Table 36-30 - Definition of the Punctured Channel
882 * Information field in the U-SIG for an EHT MU PPDU using non-OFDMA
883 * transmissions */
884 static const u16 punct_bitmap_80[] = { 0xF, 0xE, 0xD, 0xB, 0x7 };
885 static const u16 punct_bitmap_160[] = {
886 0xFF, 0xFE, 0xFD, 0xFB, 0xF7, 0xEF, 0xDF, 0xBF,
887 0x7F, 0xFC, 0xF3, 0xCF, 0x3F
888 };
889 static const u16 punct_bitmap_320[] = {
890 0xFFFF, 0xFFFC, 0xFFF3, 0xFFCF, 0xFF3F, 0xFCFF, 0xF3FF, 0xCFFF,
891 0x3FFF, 0xFFF0, 0xFF0F, 0xF0FF, 0x0FFF, 0xFFC0, 0xFF30, 0xFCF0,
892 0xF3F0, 0xCFF0, 0x3FF0, 0x0FFC, 0x0FF3, 0x0FCF, 0x0F3F, 0x0CFF,
893 0x03FF
894 };
895
896
is_punct_bitmap_valid(u16 bw,u16 pri_ch_bit_pos,u16 punct_bitmap)897 bool is_punct_bitmap_valid(u16 bw, u16 pri_ch_bit_pos, u16 punct_bitmap)
898 {
899 u8 i, count;
900 u16 bitmap;
901 const u16 *valid_bitmaps;
902
903 if (!punct_bitmap) /* All channels active */
904 return true;
905
906 bitmap = ~punct_bitmap;
907
908 switch (bw) {
909 case 80:
910 bitmap &= 0xF;
911 valid_bitmaps = punct_bitmap_80;
912 count = ARRAY_SIZE(punct_bitmap_80);
913 break;
914
915 case 160:
916 bitmap &= 0xFF;
917 valid_bitmaps = punct_bitmap_160;
918 count = ARRAY_SIZE(punct_bitmap_160);
919 break;
920
921 case 320:
922 bitmap &= 0xFFFF;
923 valid_bitmaps = punct_bitmap_320;
924 count = ARRAY_SIZE(punct_bitmap_320);
925 break;
926
927 default:
928 return false;
929 }
930
931 if (!bitmap) /* No channel active */
932 return false;
933
934 if (!(bitmap & BIT(pri_ch_bit_pos))) {
935 wpa_printf(MSG_DEBUG, "Primary channel cannot be punctured");
936 return false;
937 }
938
939 for (i = 0; i < count; i++) {
940 if (valid_bitmaps[i] == bitmap)
941 return true;
942 }
943
944 return false;
945 }
946