1 /*
2 * hostapd / Hardware feature query and different modes
3 * Copyright 2002-2003, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
6 *
7 * This software may be distributed under the terms of the BSD license.
8 * See README for more details.
9 */
10
11 #include "utils/includes.h"
12
13 #include "utils/common.h"
14 #include "utils/eloop.h"
15 #include "common/ieee802_11_defs.h"
16 #include "common/ieee802_11_common.h"
17 #include "common/wpa_ctrl.h"
18 #include "common/hw_features_common.h"
19 #include "hostapd.h"
20 #include "ap_config.h"
21 #include "ap_drv_ops.h"
22 #include "acs.h"
23 #include "ieee802_11.h"
24 #include "beacon.h"
25 #include "hw_features.h"
26
27
hostapd_free_hw_features(struct hostapd_hw_modes * hw_features,size_t num_hw_features)28 void hostapd_free_hw_features(struct hostapd_hw_modes *hw_features,
29 size_t num_hw_features)
30 {
31 size_t i;
32
33 if (hw_features == NULL)
34 return;
35
36 for (i = 0; i < num_hw_features; i++) {
37 os_free(hw_features[i].channels);
38 os_free(hw_features[i].rates);
39 }
40
41 os_free(hw_features);
42 }
43
44
45 #ifndef CONFIG_NO_STDOUT_DEBUG
dfs_info(struct hostapd_channel_data * chan)46 static char * dfs_info(struct hostapd_channel_data *chan)
47 {
48 static char info[256];
49 char *state;
50
51 switch (chan->flag & HOSTAPD_CHAN_DFS_MASK) {
52 case HOSTAPD_CHAN_DFS_UNKNOWN:
53 state = "unknown";
54 break;
55 case HOSTAPD_CHAN_DFS_USABLE:
56 state = "usable";
57 break;
58 case HOSTAPD_CHAN_DFS_UNAVAILABLE:
59 state = "unavailable";
60 break;
61 case HOSTAPD_CHAN_DFS_AVAILABLE:
62 state = "available";
63 break;
64 default:
65 return "";
66 }
67 os_snprintf(info, sizeof(info), " (DFS state = %s)", state);
68 info[sizeof(info) - 1] = '\0';
69
70 return info;
71 }
72 #endif /* CONFIG_NO_STDOUT_DEBUG */
73
74
move_survey_data(struct hostapd_channel_data * new_chan,struct hostapd_channel_data * old_chan)75 static void move_survey_data(struct hostapd_channel_data *new_chan,
76 struct hostapd_channel_data *old_chan)
77 {
78 struct freq_survey *survey, *tmp;
79
80 /* Copy the survey list from the old to new channel */
81 if (old_chan->flag & HOSTAPD_CHAN_SURVEY_LIST_INITIALIZED) {
82 dl_list_init(&new_chan->survey_list);
83 dl_list_for_each_safe(survey, tmp, &old_chan->survey_list,
84 struct freq_survey, list) {
85 dl_list_del(&survey->list);
86 dl_list_add(&new_chan->survey_list,
87 &survey->list);
88 }
89 new_chan->flag |= HOSTAPD_CHAN_SURVEY_LIST_INITIALIZED;
90 }
91 }
92
93
move_hw_mode_data(struct hostapd_hw_modes * new_feature,struct hostapd_hw_modes * old_feature)94 static void move_hw_mode_data(struct hostapd_hw_modes *new_feature,
95 struct hostapd_hw_modes *old_feature)
96 {
97 int i, j;
98
99 for (i = 0; i < new_feature->num_channels; i++) {
100 struct hostapd_channel_data *new_chan;
101 struct hostapd_channel_data *old_chan;
102
103 new_chan = &new_feature->channels[i];
104
105 for (j = 0; j < old_feature->num_channels; j++) {
106 old_chan = &old_feature->channels[j];
107
108 if (new_chan->freq != old_chan->freq)
109 continue;
110
111 move_survey_data(new_chan, old_chan);
112 break;
113 }
114 }
115 }
116
117
hostapd_get_hw_features(struct hostapd_iface * iface)118 int hostapd_get_hw_features(struct hostapd_iface *iface)
119 {
120 struct hostapd_data *hapd = iface->bss[0];
121 int i, j;
122 unsigned int k;
123 u16 num_modes, flags;
124 struct hostapd_hw_modes *modes;
125 u8 dfs_domain;
126 enum hostapd_hw_mode mode = HOSTAPD_MODE_IEEE80211ANY;
127 bool is_6ghz = false;
128 bool orig_mode_valid = false;
129 struct hostapd_multi_hw_info *multi_hw_info;
130 unsigned int num_multi_hws;
131
132 if (hostapd_drv_none(hapd))
133 return -1;
134 modes = hostapd_get_hw_feature_data(hapd, &num_modes, &flags,
135 &dfs_domain);
136 if (modes == NULL) {
137 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
138 HOSTAPD_LEVEL_DEBUG,
139 "Fetching hardware channel/rate support not "
140 "supported.");
141 return -1;
142 }
143
144 iface->hw_flags = flags;
145 iface->dfs_domain = dfs_domain;
146
147 if (iface->current_mode) {
148 /*
149 * Received driver event CHANNEL_LIST_CHANGED when the current
150 * hw mode is valid. Clear iface->current_mode temporarily as
151 * the mode instance will be replaced with a new instance and
152 * the current pointer would be pointing to freed memory.
153 */
154 orig_mode_valid = true;
155 mode = iface->current_mode->mode;
156 is_6ghz = iface->current_mode->is_6ghz;
157 iface->current_mode = NULL;
158 }
159
160 for (i = 0; i < num_modes; i++) {
161 struct hostapd_hw_modes *feature = &modes[i];
162 int dfs_enabled = hapd->iconf->ieee80211h &&
163 (iface->drv_flags & WPA_DRIVER_FLAGS_RADAR);
164
165 /* Restore orignal mode if possible */
166 if (orig_mode_valid && feature->mode == mode &&
167 feature->num_channels > 0 &&
168 is_6ghz == is_6ghz_freq(feature->channels[0].freq))
169 iface->current_mode = feature;
170
171 /* set flag for channels we can use in current regulatory
172 * domain */
173 for (j = 0; j < feature->num_channels; j++) {
174 int dfs = 0;
175
176 /*
177 * Disable all channels that are marked not to allow
178 * to initiate radiation (a.k.a. passive scan and no
179 * IBSS).
180 * Use radar channels only if the driver supports DFS.
181 */
182 if ((feature->channels[j].flag &
183 HOSTAPD_CHAN_RADAR) && dfs_enabled) {
184 dfs = 1;
185 } else if (((feature->channels[j].flag &
186 HOSTAPD_CHAN_RADAR) &&
187 !(iface->drv_flags &
188 WPA_DRIVER_FLAGS_DFS_OFFLOAD) &&
189 !iface->assisted_dfs) ||
190 (feature->channels[j].flag &
191 HOSTAPD_CHAN_NO_IR)) {
192 feature->channels[j].flag |=
193 HOSTAPD_CHAN_DISABLED;
194 }
195
196 if (feature->channels[j].flag & HOSTAPD_CHAN_DISABLED)
197 continue;
198
199 wpa_printf(MSG_MSGDUMP, "Allowed channel: mode=%d "
200 "chan=%d freq=%d MHz max_tx_power=%d dBm%s",
201 feature->mode,
202 feature->channels[j].chan,
203 feature->channels[j].freq,
204 feature->channels[j].max_tx_power,
205 dfs ? dfs_info(&feature->channels[j]) : "");
206 }
207
208 /* Move any old data that should be kept */
209 for (j = 0; j < iface->num_hw_features; j++) {
210 struct hostapd_hw_modes *old_feature =
211 &iface->hw_features[j];
212
213 if (feature->mode != old_feature->mode)
214 continue;
215
216 move_hw_mode_data(feature, old_feature);
217 }
218 }
219
220 hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
221 iface->hw_features = modes;
222 iface->num_hw_features = num_modes;
223
224 hostap_afc_disable_channels(iface);
225
226 if (orig_mode_valid && !iface->current_mode) {
227 wpa_printf(MSG_ERROR,
228 "%s: Could not update iface->current_mode",
229 __func__);
230 }
231
232 multi_hw_info = hostapd_get_multi_hw_info(hapd, &num_multi_hws);
233 if (!multi_hw_info)
234 return 0;
235
236 hostapd_free_multi_hw_info(iface->multi_hw_info);
237 iface->multi_hw_info = multi_hw_info;
238 iface->num_multi_hws = num_multi_hws;
239
240 wpa_printf(MSG_DEBUG, "Multiple underlying hardwares info:");
241
242 for (k = 0; k < num_multi_hws; k++) {
243 struct hostapd_multi_hw_info *hw_info = &multi_hw_info[k];
244
245 wpa_printf(MSG_DEBUG,
246 " %d. hw_idx=%u, frequency range: %d-%d MHz",
247 k + 1, hw_info->hw_idx, hw_info->start_freq,
248 hw_info->end_freq);
249 }
250
251 return 0;
252 }
253
254
hostapd_prepare_rates(struct hostapd_data * hapd,struct hostapd_hw_modes * mode)255 int hostapd_prepare_rates(struct hostapd_data *hapd,
256 struct hostapd_hw_modes *mode)
257 {
258 struct hostapd_bss_config *conf = hapd->conf;
259 int i, num_basic_rates = 0;
260 int basic_rates_a[] = { 60, 120, 240, 0 };
261 int basic_rates_b[] = { 10, 20, 0 };
262 int basic_rates_g[] = { 10, 20, 55, 110, 0 };
263 const int *basic_rates;
264
265 if (conf->basic_rates)
266 basic_rates = conf->basic_rates;
267 else switch (mode->mode) {
268 case HOSTAPD_MODE_IEEE80211A:
269 basic_rates = basic_rates_a;
270 break;
271 case HOSTAPD_MODE_IEEE80211B:
272 basic_rates = basic_rates_b;
273 break;
274 case HOSTAPD_MODE_IEEE80211G:
275 basic_rates = basic_rates_g;
276 break;
277 case HOSTAPD_MODE_IEEE80211AD:
278 return 0; /* No basic rates for 11ad */
279 default:
280 return -1;
281 }
282
283 os_free(hapd->basic_rates);
284 hapd->basic_rates = int_array_dup(basic_rates);
285
286 os_free(hapd->current_rates);
287 hapd->num_rates = 0;
288
289 hapd->current_rates =
290 os_calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
291 if (!hapd->current_rates) {
292 wpa_printf(MSG_ERROR, "Failed to allocate memory for rate "
293 "table.");
294 return -1;
295 }
296
297 for (i = 0; i < mode->num_rates; i++) {
298 struct hostapd_rate_data *rate;
299
300 if (conf->supported_rates &&
301 !int_array_includes(conf->supported_rates, mode->rates[i]))
302 continue;
303
304 rate = &hapd->current_rates[hapd->num_rates];
305 rate->rate = mode->rates[i];
306 if (int_array_includes(basic_rates, rate->rate)) {
307 rate->flags |= HOSTAPD_RATE_BASIC;
308 num_basic_rates++;
309 }
310 wpa_printf(MSG_DEBUG, "RATE[%d] rate=%d flags=0x%x",
311 hapd->num_rates, rate->rate, rate->flags);
312 hapd->num_rates++;
313 }
314
315 if ((hapd->num_rates == 0 || num_basic_rates == 0) &&
316 (!hapd->iconf->ieee80211n || !hapd->iconf->require_ht)) {
317 wpa_printf(MSG_ERROR, "No rates remaining in supported/basic "
318 "rate sets (%d,%d).",
319 hapd->num_rates, num_basic_rates);
320 return -1;
321 }
322
323 return 0;
324 }
325
326
ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface * iface)327 static int ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface *iface)
328 {
329 int pri_freq, sec_freq;
330 struct hostapd_channel_data *p_chan, *s_chan;
331
332 pri_freq = iface->freq;
333 sec_freq = pri_freq + iface->conf->secondary_channel * 20;
334
335 if (!iface->current_mode)
336 return 0;
337
338 p_chan = hw_get_channel_freq(iface->current_mode->mode, pri_freq, NULL,
339 iface->hw_features,
340 iface->num_hw_features);
341
342 s_chan = hw_get_channel_freq(iface->current_mode->mode, sec_freq, NULL,
343 iface->hw_features,
344 iface->num_hw_features);
345
346 return allowed_ht40_channel_pair(iface->current_mode->mode,
347 p_chan, s_chan);
348 }
349
350
ieee80211n_switch_pri_sec(struct hostapd_iface * iface)351 static void ieee80211n_switch_pri_sec(struct hostapd_iface *iface)
352 {
353 if (iface->conf->secondary_channel > 0) {
354 iface->conf->channel += 4;
355 iface->freq += 20;
356 iface->conf->secondary_channel = -1;
357 } else {
358 iface->conf->channel -= 4;
359 iface->freq -= 20;
360 iface->conf->secondary_channel = 1;
361 }
362 }
363
364
ieee80211n_check_40mhz_5g(struct hostapd_iface * iface,struct wpa_scan_results * scan_res)365 static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface,
366 struct wpa_scan_results *scan_res)
367 {
368 unsigned int pri_freq, sec_freq;
369 int res;
370 struct hostapd_channel_data *pri_chan, *sec_chan;
371
372 pri_freq = iface->freq;
373 sec_freq = pri_freq + iface->conf->secondary_channel * 20;
374
375 if (!iface->current_mode)
376 return 0;
377 pri_chan = hw_get_channel_freq(iface->current_mode->mode, pri_freq,
378 NULL, iface->hw_features,
379 iface->num_hw_features);
380 sec_chan = hw_get_channel_freq(iface->current_mode->mode, sec_freq,
381 NULL, iface->hw_features,
382 iface->num_hw_features);
383
384 res = check_40mhz_5g(scan_res, pri_chan, sec_chan);
385
386 if (res == 2) {
387 if (iface->conf->no_pri_sec_switch) {
388 wpa_printf(MSG_DEBUG,
389 "Cannot switch PRI/SEC channels due to local constraint");
390 } else {
391 ieee80211n_switch_pri_sec(iface);
392 }
393 }
394
395 return !!res;
396 }
397
398
ieee80211n_check_40mhz_2g4(struct hostapd_iface * iface,struct wpa_scan_results * scan_res)399 static int ieee80211n_check_40mhz_2g4(struct hostapd_iface *iface,
400 struct wpa_scan_results *scan_res)
401 {
402 int pri_chan, sec_chan;
403
404 pri_chan = iface->conf->channel;
405 sec_chan = pri_chan + iface->conf->secondary_channel * 4;
406
407 return check_40mhz_2g4(iface->current_mode, scan_res, pri_chan,
408 sec_chan);
409 }
410
411
ieee80211n_check_scan(struct hostapd_iface * iface)412 static void ieee80211n_check_scan(struct hostapd_iface *iface)
413 {
414 struct wpa_scan_results *scan_res;
415 int oper40;
416 int res = 0;
417
418 /* Check list of neighboring BSSes (from scan) to see whether 40 MHz is
419 * allowed per IEEE Std 802.11-2012, 10.15.3.2 */
420
421 iface->scan_cb = NULL;
422
423 scan_res = hostapd_driver_get_scan_results(iface->bss[0]);
424 if (scan_res == NULL) {
425 hostapd_setup_interface_complete(iface, 1);
426 return;
427 }
428
429 if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A)
430 oper40 = ieee80211n_check_40mhz_5g(iface, scan_res);
431 else
432 oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res);
433 wpa_scan_results_free(scan_res);
434
435 iface->secondary_ch = iface->conf->secondary_channel;
436 if (!oper40) {
437 wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on "
438 "channel pri=%d sec=%d based on overlapping BSSes",
439 iface->conf->channel,
440 iface->conf->channel +
441 iface->conf->secondary_channel * 4);
442 iface->conf->secondary_channel = 0;
443 if (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX) {
444 /*
445 * TODO: Could consider scheduling another scan to check
446 * if channel width can be changed if no coex reports
447 * are received from associating stations.
448 */
449 }
450 }
451
452 #ifdef CONFIG_IEEE80211AX
453 if (iface->conf->secondary_channel &&
454 iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
455 iface->conf->ieee80211ax) {
456 struct he_capabilities *he_cap;
457
458 he_cap = &iface->current_mode->he_capab[IEEE80211_MODE_AP];
459 if (!(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
460 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_IN_2G)) {
461 wpa_printf(MSG_DEBUG,
462 "HE: 40 MHz channel width is not supported in 2.4 GHz; clear secondary channel configuration");
463 iface->conf->secondary_channel = 0;
464 }
465 }
466 #endif /* CONFIG_IEEE80211AX */
467
468 if (iface->conf->secondary_channel)
469 res = ieee80211n_allowed_ht40_channel_pair(iface);
470 if (!res) {
471 iface->conf->secondary_channel = 0;
472 hostapd_set_oper_centr_freq_seg0_idx(iface->conf, 0);
473 hostapd_set_oper_centr_freq_seg1_idx(iface->conf, 0);
474 hostapd_set_oper_chwidth(iface->conf, CONF_OPER_CHWIDTH_USE_HT);
475 res = 1;
476 wpa_printf(MSG_INFO, "Fallback to 20 MHz");
477 }
478
479 hostapd_setup_interface_complete(iface, !res);
480 }
481
482
ieee80211n_scan_channels_2g4(struct hostapd_iface * iface,struct wpa_driver_scan_params * params)483 static void ieee80211n_scan_channels_2g4(struct hostapd_iface *iface,
484 struct wpa_driver_scan_params *params)
485 {
486 /* Scan only the affected frequency range */
487 int pri_freq, sec_freq;
488 int affected_start, affected_end;
489 int i, pos;
490 struct hostapd_hw_modes *mode;
491
492 if (iface->current_mode == NULL)
493 return;
494
495 pri_freq = iface->freq;
496 if (iface->conf->secondary_channel > 0)
497 sec_freq = pri_freq + 20;
498 else
499 sec_freq = pri_freq - 20;
500 /*
501 * Note: Need to find the PRI channel also in cases where the affected
502 * channel is the SEC channel of a 40 MHz BSS, so need to include the
503 * scanning coverage here to be 40 MHz from the center frequency.
504 */
505 affected_start = (pri_freq + sec_freq) / 2 - 40;
506 affected_end = (pri_freq + sec_freq) / 2 + 40;
507 wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
508 affected_start, affected_end);
509
510 mode = iface->current_mode;
511 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
512 if (params->freqs == NULL)
513 return;
514 pos = 0;
515
516 for (i = 0; i < mode->num_channels; i++) {
517 struct hostapd_channel_data *chan = &mode->channels[i];
518 if (chan->flag & HOSTAPD_CHAN_DISABLED)
519 continue;
520 if (chan->freq < affected_start ||
521 chan->freq > affected_end)
522 continue;
523 params->freqs[pos++] = chan->freq;
524 }
525 }
526
527
ieee80211n_scan_channels_5g(struct hostapd_iface * iface,struct wpa_driver_scan_params * params)528 static void ieee80211n_scan_channels_5g(struct hostapd_iface *iface,
529 struct wpa_driver_scan_params *params)
530 {
531 /* Scan only the affected frequency range */
532 int pri_freq;
533 int affected_start, affected_end;
534 int i, pos;
535 struct hostapd_hw_modes *mode;
536
537 if (iface->current_mode == NULL)
538 return;
539
540 pri_freq = iface->freq;
541 if (iface->conf->secondary_channel > 0) {
542 affected_start = pri_freq - 10;
543 affected_end = pri_freq + 30;
544 } else {
545 affected_start = pri_freq - 30;
546 affected_end = pri_freq + 10;
547 }
548 wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
549 affected_start, affected_end);
550
551 mode = iface->current_mode;
552 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
553 if (params->freqs == NULL)
554 return;
555 pos = 0;
556
557 for (i = 0; i < mode->num_channels; i++) {
558 struct hostapd_channel_data *chan = &mode->channels[i];
559 if (chan->flag & HOSTAPD_CHAN_DISABLED)
560 continue;
561 if (chan->freq < affected_start ||
562 chan->freq > affected_end)
563 continue;
564 params->freqs[pos++] = chan->freq;
565 }
566 }
567
568
ap_ht40_scan_retry(void * eloop_data,void * user_data)569 static void ap_ht40_scan_retry(void *eloop_data, void *user_data)
570 {
571 #define HT2040_COEX_SCAN_RETRY 15
572 struct hostapd_iface *iface = eloop_data;
573 struct wpa_driver_scan_params params;
574 int ret;
575
576 os_memset(¶ms, 0, sizeof(params));
577 if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
578 ieee80211n_scan_channels_2g4(iface, ¶ms);
579 else
580 ieee80211n_scan_channels_5g(iface, ¶ms);
581
582 ret = hostapd_driver_scan(iface->bss[0], ¶ms);
583 iface->num_ht40_scan_tries++;
584 os_free(params.freqs);
585
586 if (ret == -EBUSY &&
587 iface->num_ht40_scan_tries < HT2040_COEX_SCAN_RETRY) {
588 wpa_printf(MSG_ERROR,
589 "Failed to request a scan of neighboring BSSes ret=%d (%s) - try to scan again (attempt %d)",
590 ret, strerror(-ret), iface->num_ht40_scan_tries);
591 eloop_register_timeout(1, 0, ap_ht40_scan_retry, iface, NULL);
592 return;
593 }
594
595 if (ret == 0) {
596 iface->scan_cb = ieee80211n_check_scan;
597 iface->bss[0]->scan_cookie = params.scan_cookie;
598 return;
599 }
600
601 wpa_printf(MSG_DEBUG,
602 "Failed to request a scan in device, bringing up in HT20 mode");
603 hostapd_set_oper_centr_freq_seg0_idx(iface->conf, 0);
604 hostapd_set_oper_centr_freq_seg1_idx(iface->conf, 0);
605 hostapd_set_oper_chwidth(iface->conf, CONF_OPER_CHWIDTH_USE_HT);
606 iface->conf->secondary_channel = 0;
607 iface->conf->ht_capab &= ~HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
608 hostapd_setup_interface_complete(iface, 0);
609 }
610
611
hostapd_stop_setup_timers(struct hostapd_iface * iface)612 void hostapd_stop_setup_timers(struct hostapd_iface *iface)
613 {
614 eloop_cancel_timeout(ap_ht40_scan_retry, iface, NULL);
615 }
616
617
ieee80211n_check_40mhz(struct hostapd_iface * iface)618 static int ieee80211n_check_40mhz(struct hostapd_iface *iface)
619 {
620 struct wpa_driver_scan_params params;
621 int ret;
622
623 /* Check that HT40 is used and PRI / SEC switch is allowed */
624 if (!iface->conf->secondary_channel || iface->conf->no_pri_sec_switch)
625 return 0;
626
627 hostapd_set_state(iface, HAPD_IFACE_HT_SCAN);
628 wpa_printf(MSG_DEBUG, "Scan for neighboring BSSes prior to enabling "
629 "40 MHz channel");
630 os_memset(¶ms, 0, sizeof(params));
631 if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
632 ieee80211n_scan_channels_2g4(iface, ¶ms);
633 else
634 ieee80211n_scan_channels_5g(iface, ¶ms);
635
636 ret = hostapd_driver_scan(iface->bss[0], ¶ms);
637 os_free(params.freqs);
638
639 if (ret == -EBUSY) {
640 wpa_printf(MSG_ERROR,
641 "Failed to request a scan of neighboring BSSes ret=%d (%s) - try to scan again",
642 ret, strerror(-ret));
643 iface->num_ht40_scan_tries = 1;
644 eloop_cancel_timeout(ap_ht40_scan_retry, iface, NULL);
645 eloop_register_timeout(1, 0, ap_ht40_scan_retry, iface, NULL);
646 return 1;
647 }
648
649 if (ret < 0) {
650 wpa_printf(MSG_ERROR,
651 "Failed to request a scan of neighboring BSSes ret=%d (%s)",
652 ret, strerror(-ret));
653 return -1;
654 }
655
656 iface->scan_cb = ieee80211n_check_scan;
657 iface->bss[0]->scan_cookie = params.scan_cookie;
658 return 1;
659 }
660
661
ieee80211n_supported_ht_capab(struct hostapd_iface * iface)662 static int ieee80211n_supported_ht_capab(struct hostapd_iface *iface)
663 {
664 u16 hw = iface->current_mode->ht_capab;
665 u16 conf = iface->conf->ht_capab;
666
667 if ((conf & HT_CAP_INFO_LDPC_CODING_CAP) &&
668 !(hw & HT_CAP_INFO_LDPC_CODING_CAP)) {
669 wpa_printf(MSG_ERROR, "Driver does not support configured "
670 "HT capability [LDPC]");
671 return 0;
672 }
673
674 /*
675 * Driver ACS chosen channel may not be HT40 due to internal driver
676 * restrictions.
677 */
678 if (!iface->conf->acs && (conf & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) &&
679 !(hw & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) {
680 wpa_printf(MSG_ERROR, "Driver does not support configured "
681 "HT capability [HT40*]");
682 return 0;
683 }
684
685 if ((conf & HT_CAP_INFO_GREEN_FIELD) &&
686 !(hw & HT_CAP_INFO_GREEN_FIELD)) {
687 wpa_printf(MSG_ERROR, "Driver does not support configured "
688 "HT capability [GF]");
689 return 0;
690 }
691
692 if ((conf & HT_CAP_INFO_SHORT_GI20MHZ) &&
693 !(hw & HT_CAP_INFO_SHORT_GI20MHZ)) {
694 wpa_printf(MSG_ERROR, "Driver does not support configured "
695 "HT capability [SHORT-GI-20]");
696 return 0;
697 }
698
699 if ((conf & HT_CAP_INFO_SHORT_GI40MHZ) &&
700 !(hw & HT_CAP_INFO_SHORT_GI40MHZ)) {
701 wpa_printf(MSG_ERROR, "Driver does not support configured "
702 "HT capability [SHORT-GI-40]");
703 return 0;
704 }
705
706 if ((conf & HT_CAP_INFO_TX_STBC) && !(hw & HT_CAP_INFO_TX_STBC)) {
707 wpa_printf(MSG_ERROR, "Driver does not support configured "
708 "HT capability [TX-STBC]");
709 return 0;
710 }
711
712 if ((conf & HT_CAP_INFO_RX_STBC_MASK) >
713 (hw & HT_CAP_INFO_RX_STBC_MASK)) {
714 wpa_printf(MSG_ERROR, "Driver does not support configured "
715 "HT capability [RX-STBC*]");
716 return 0;
717 }
718
719 if ((conf & HT_CAP_INFO_DELAYED_BA) &&
720 !(hw & HT_CAP_INFO_DELAYED_BA)) {
721 wpa_printf(MSG_ERROR, "Driver does not support configured "
722 "HT capability [DELAYED-BA]");
723 return 0;
724 }
725
726 if ((conf & HT_CAP_INFO_MAX_AMSDU_SIZE) &&
727 !(hw & HT_CAP_INFO_MAX_AMSDU_SIZE)) {
728 wpa_printf(MSG_ERROR, "Driver does not support configured "
729 "HT capability [MAX-AMSDU-7935]");
730 return 0;
731 }
732
733 if ((conf & HT_CAP_INFO_DSSS_CCK40MHZ) &&
734 !(hw & HT_CAP_INFO_DSSS_CCK40MHZ)) {
735 wpa_printf(MSG_ERROR, "Driver does not support configured "
736 "HT capability [DSSS_CCK-40]");
737 return 0;
738 }
739
740 if ((conf & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT) &&
741 !(hw & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT)) {
742 wpa_printf(MSG_ERROR, "Driver does not support configured "
743 "HT capability [LSIG-TXOP-PROT]");
744 return 0;
745 }
746
747 return 1;
748 }
749
750
751 #ifdef CONFIG_IEEE80211AC
ieee80211ac_supported_vht_capab(struct hostapd_iface * iface)752 static int ieee80211ac_supported_vht_capab(struct hostapd_iface *iface)
753 {
754 struct hostapd_hw_modes *mode = iface->current_mode;
755 u32 hw = mode->vht_capab;
756 u32 conf = iface->conf->vht_capab;
757
758 wpa_printf(MSG_DEBUG, "hw vht capab: 0x%x, conf vht capab: 0x%x",
759 hw, conf);
760
761 if (mode->mode == HOSTAPD_MODE_IEEE80211G &&
762 iface->conf->bss[0]->vendor_vht &&
763 mode->vht_capab == 0 && iface->hw_features) {
764 int i;
765
766 for (i = 0; i < iface->num_hw_features; i++) {
767 if (iface->hw_features[i].mode ==
768 HOSTAPD_MODE_IEEE80211A) {
769 mode = &iface->hw_features[i];
770 hw = mode->vht_capab;
771 wpa_printf(MSG_DEBUG,
772 "update hw vht capab based on 5 GHz band: 0x%x",
773 hw);
774 break;
775 }
776 }
777 }
778
779 return ieee80211ac_cap_check(hw, conf);
780 }
781 #endif /* CONFIG_IEEE80211AC */
782
783
784 #ifdef CONFIG_IEEE80211BE
ieee80211be_supported_eht_capab(struct hostapd_iface * iface)785 static int ieee80211be_supported_eht_capab(struct hostapd_iface *iface)
786 {
787 return iface->current_mode->eht_capab[IEEE80211_MODE_AP].eht_supported;
788 }
789 #endif /* CONFIG_IEEE80211BE */
790
791
792 #ifdef CONFIG_IEEE80211AX
ieee80211ax_supported_he_capab(struct hostapd_iface * iface)793 static int ieee80211ax_supported_he_capab(struct hostapd_iface *iface)
794 {
795 return iface->current_mode->he_capab[IEEE80211_MODE_AP].he_supported;
796 }
797 #endif /* CONFIG_IEEE80211AX */
798
799
hostapd_check_ht_capab(struct hostapd_iface * iface)800 int hostapd_check_ht_capab(struct hostapd_iface *iface)
801 {
802 int ret;
803
804 if (is_6ghz_freq(iface->freq))
805 return 0;
806 if (!iface->conf->ieee80211n)
807 return 0;
808
809 if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211B &&
810 iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G &&
811 (iface->conf->ht_capab & HT_CAP_INFO_DSSS_CCK40MHZ)) {
812 wpa_printf(MSG_DEBUG,
813 "Disable HT capability [DSSS_CCK-40] on 5 GHz band");
814 iface->conf->ht_capab &= ~HT_CAP_INFO_DSSS_CCK40MHZ;
815 }
816
817 if (!ieee80211n_supported_ht_capab(iface))
818 return -1;
819 #ifdef CONFIG_IEEE80211BE
820 if (iface->conf->ieee80211be &&
821 !ieee80211be_supported_eht_capab(iface)) {
822 wpa_printf(MSG_ERROR, "Driver does not support EHT");
823 return -1;
824 }
825 #endif /* CONFIG_IEEE80211BE */
826 #ifdef CONFIG_IEEE80211AX
827 if (iface->conf->ieee80211ax &&
828 !ieee80211ax_supported_he_capab(iface)) {
829 wpa_printf(MSG_ERROR, "Driver does not support HE");
830 return -1;
831 }
832 #endif /* CONFIG_IEEE80211AX */
833 #ifdef CONFIG_IEEE80211AC
834 if (iface->conf->ieee80211ac &&
835 !ieee80211ac_supported_vht_capab(iface))
836 return -1;
837 #endif /* CONFIG_IEEE80211AC */
838 ret = ieee80211n_check_40mhz(iface);
839 if (ret)
840 return ret;
841 if (!ieee80211n_allowed_ht40_channel_pair(iface))
842 return -1;
843
844 return 0;
845 }
846
847
hostapd_check_edmg_capab(struct hostapd_iface * iface)848 int hostapd_check_edmg_capab(struct hostapd_iface *iface)
849 {
850 struct hostapd_hw_modes *mode = iface->hw_features;
851 struct ieee80211_edmg_config edmg;
852
853 if (!iface->conf->enable_edmg)
854 return 0;
855
856 hostapd_encode_edmg_chan(iface->conf->enable_edmg,
857 iface->conf->edmg_channel,
858 iface->conf->channel,
859 &edmg);
860
861 if (mode->edmg.channels && ieee802_edmg_is_allowed(mode->edmg, edmg))
862 return 0;
863
864 wpa_printf(MSG_WARNING, "Requested EDMG configuration is not valid");
865 wpa_printf(MSG_INFO, "EDMG capab: channels 0x%x, bw_config %d",
866 mode->edmg.channels, mode->edmg.bw_config);
867 wpa_printf(MSG_INFO,
868 "Requested EDMG configuration: channels 0x%x, bw_config %d",
869 edmg.channels, edmg.bw_config);
870 return -1;
871 }
872
873
hostapd_check_he_6ghz_capab(struct hostapd_iface * iface)874 int hostapd_check_he_6ghz_capab(struct hostapd_iface *iface)
875 {
876 #ifdef CONFIG_IEEE80211AX
877 struct he_capabilities *he_cap;
878 u16 hw;
879
880 if (!iface->current_mode || !is_6ghz_freq(iface->freq))
881 return 0;
882
883 he_cap = &iface->current_mode->he_capab[IEEE80211_MODE_AP];
884 hw = he_cap->he_6ghz_capa;
885 if (iface->conf->he_6ghz_max_mpdu >
886 ((hw & HE_6GHZ_BAND_CAP_MAX_MPDU_LEN_MASK) >>
887 HE_6GHZ_BAND_CAP_MAX_MPDU_LEN_SHIFT)) {
888 wpa_printf(MSG_ERROR,
889 "The driver does not support the configured HE 6 GHz Max MPDU length");
890 return -1;
891 }
892
893 if (iface->conf->he_6ghz_max_ampdu_len_exp >
894 ((hw & HE_6GHZ_BAND_CAP_MAX_AMPDU_LEN_EXP_MASK) >>
895 HE_6GHZ_BAND_CAP_MAX_AMPDU_LEN_EXP_SHIFT)) {
896 wpa_printf(MSG_ERROR,
897 "The driver does not support the configured HE 6 GHz Max AMPDU Length Exponent");
898 return -1;
899 }
900
901 if (iface->conf->he_6ghz_rx_ant_pat &&
902 !(hw & HE_6GHZ_BAND_CAP_RX_ANTPAT_CONS)) {
903 wpa_printf(MSG_ERROR,
904 "The driver does not support the configured HE 6 GHz Rx Antenna Pattern");
905 return -1;
906 }
907
908 if (iface->conf->he_6ghz_tx_ant_pat &&
909 !(hw & HE_6GHZ_BAND_CAP_TX_ANTPAT_CONS)) {
910 wpa_printf(MSG_ERROR,
911 "The driver does not support the configured HE 6 GHz Tx Antenna Pattern");
912 return -1;
913 }
914 #endif /* CONFIG_IEEE80211AX */
915 return 0;
916 }
917
918
919 /* Returns:
920 * 1 = usable
921 * 0 = not usable
922 * -1 = not currently usable due to 6 GHz NO-IR
923 */
hostapd_is_usable_chan(struct hostapd_iface * iface,int frequency,int primary)924 static int hostapd_is_usable_chan(struct hostapd_iface *iface,
925 int frequency, int primary)
926 {
927 struct hostapd_channel_data *chan;
928
929 if (!iface->current_mode)
930 return 0;
931
932 chan = hw_get_channel_freq(iface->current_mode->mode, frequency, NULL,
933 iface->hw_features, iface->num_hw_features);
934 if (!chan)
935 return 0;
936
937 if ((primary && chan_pri_allowed(chan)) ||
938 (!primary && !(chan->flag & HOSTAPD_CHAN_DISABLED)))
939 return 1;
940
941 wpa_printf(MSG_INFO,
942 "Frequency %d (%s) not allowed for AP mode, flags: 0x%x%s%s",
943 frequency, primary ? "primary" : "secondary",
944 chan->flag,
945 chan->flag & HOSTAPD_CHAN_NO_IR ? " NO-IR" : "",
946 chan->flag & HOSTAPD_CHAN_RADAR ? " RADAR" : "");
947
948 if (is_6ghz_freq(chan->freq) && (chan->flag & HOSTAPD_CHAN_NO_IR))
949 return -1;
950
951 return 0;
952 }
953
954
hostapd_is_usable_edmg(struct hostapd_iface * iface)955 static int hostapd_is_usable_edmg(struct hostapd_iface *iface)
956 {
957 int i, contiguous = 0;
958 int num_of_enabled = 0;
959 int max_contiguous = 0;
960 int err;
961 struct ieee80211_edmg_config edmg;
962 struct hostapd_channel_data *pri_chan;
963
964 if (!iface->conf->enable_edmg)
965 return 1;
966
967 if (!iface->current_mode)
968 return 0;
969 pri_chan = hw_get_channel_freq(iface->current_mode->mode,
970 iface->freq, NULL,
971 iface->hw_features,
972 iface->num_hw_features);
973 if (!pri_chan)
974 return 0;
975 hostapd_encode_edmg_chan(iface->conf->enable_edmg,
976 iface->conf->edmg_channel,
977 pri_chan->chan,
978 &edmg);
979 if (!(edmg.channels & BIT(pri_chan->chan - 1)))
980 return 0;
981
982 /* 60 GHz channels 1..6 */
983 for (i = 0; i < 6; i++) {
984 int freq = 56160 + 2160 * (i + 1);
985
986 if (edmg.channels & BIT(i)) {
987 contiguous++;
988 num_of_enabled++;
989 } else {
990 contiguous = 0;
991 continue;
992 }
993
994 /* P802.11ay defines that the total number of subfields
995 * set to one does not exceed 4.
996 */
997 if (num_of_enabled > 4)
998 return 0;
999
1000 err = hostapd_is_usable_chan(iface, freq, 1);
1001 if (err <= 0)
1002 return err;
1003
1004 if (contiguous > max_contiguous)
1005 max_contiguous = contiguous;
1006 }
1007
1008 /* Check if the EDMG configuration is valid under the limitations
1009 * of P802.11ay.
1010 */
1011 /* check bw_config against contiguous EDMG channels */
1012 switch (edmg.bw_config) {
1013 case EDMG_BW_CONFIG_4:
1014 if (!max_contiguous)
1015 return 0;
1016 break;
1017 case EDMG_BW_CONFIG_5:
1018 if (max_contiguous < 2)
1019 return 0;
1020 break;
1021 default:
1022 return 0;
1023 }
1024
1025 return 1;
1026 }
1027
1028
hostapd_is_usable_punct_bitmap(struct hostapd_iface * iface)1029 static bool hostapd_is_usable_punct_bitmap(struct hostapd_iface *iface)
1030 {
1031 #ifdef CONFIG_IEEE80211BE
1032 struct hostapd_config *conf = iface->conf;
1033 u16 bw;
1034 u8 start_chan;
1035
1036 if (!conf->punct_bitmap)
1037 return true;
1038
1039 if (!conf->ieee80211be) {
1040 wpa_printf(MSG_ERROR,
1041 "Currently RU puncturing is supported only if ieee80211be is enabled");
1042 return false;
1043 }
1044
1045 if (iface->freq >= 2412 && iface->freq <= 2484) {
1046 wpa_printf(MSG_ERROR,
1047 "RU puncturing not supported in 2.4 GHz");
1048 return false;
1049 }
1050
1051 /*
1052 * In the 6 GHz band, eht_oper_chwidth is ignored. Use operating class
1053 * to determine channel width.
1054 */
1055 if (conf->op_class == 137) {
1056 bw = 320;
1057 start_chan = conf->eht_oper_centr_freq_seg0_idx - 30;
1058 } else {
1059 switch (conf->eht_oper_chwidth) {
1060 case 0:
1061 wpa_printf(MSG_ERROR,
1062 "RU puncturing is supported only in 80 MHz and 160 MHz");
1063 return false;
1064 case 1:
1065 bw = 80;
1066 start_chan = conf->eht_oper_centr_freq_seg0_idx - 6;
1067 break;
1068 case 2:
1069 bw = 160;
1070 start_chan = conf->eht_oper_centr_freq_seg0_idx - 14;
1071 break;
1072 default:
1073 return false;
1074 }
1075 }
1076
1077 if (!is_punct_bitmap_valid(bw, (conf->channel - start_chan) / 4,
1078 conf->punct_bitmap)) {
1079 wpa_printf(MSG_ERROR, "Invalid puncturing bitmap");
1080 return false;
1081 }
1082 #endif /* CONFIG_IEEE80211BE */
1083
1084 return true;
1085 }
1086
1087
hostapd_is_usable_chan_seg(struct hostapd_iface * iface)1088 static int hostapd_is_usable_chan_seg(struct hostapd_iface *iface)
1089 {
1090 int central, oper_chwidth, err;
1091 int start_chan, start_freq, chan_num, i;
1092
1093 oper_chwidth = hostapd_get_oper_chwidth(iface->conf);
1094 central = hostapd_get_oper_centr_freq_seg0_idx(iface->conf);
1095
1096 switch (oper_chwidth) {
1097 case CONF_OPER_CHWIDTH_80MHZ:
1098 case CONF_OPER_CHWIDTH_80P80MHZ:
1099 chan_num = 4;
1100 break;
1101 case CONF_OPER_CHWIDTH_160MHZ:
1102 chan_num = 8;
1103 break;
1104 case CONF_OPER_CHWIDTH_320MHZ:
1105 chan_num = 16;
1106 break;
1107 default:
1108 return 0;
1109 }
1110 start_chan = central - chan_num * 2 + 2;
1111 start_freq = hw_get_freq(iface->current_mode, start_chan);
1112
1113 if (!start_freq) {
1114 wpa_printf(MSG_ERROR, "Frequency not present (seg0)");
1115 return 0;
1116 }
1117
1118 for (i = 0; i < chan_num; i++) {
1119 int freq = start_freq + i * 20;
1120
1121 err = hostapd_is_usable_chan(iface, freq, freq == iface->freq);
1122 if (err <= 0) {
1123 wpa_printf(MSG_ERROR,
1124 "Frequency %d is not allowed (seg0)",
1125 freq);
1126 return err;
1127 }
1128 }
1129
1130 if (oper_chwidth != CONF_OPER_CHWIDTH_80P80MHZ)
1131 return 1;
1132
1133 central = hostapd_get_oper_centr_freq_seg1_idx(iface->conf);
1134 start_chan = central - chan_num * 2 + 2;
1135 start_freq = hw_get_freq(iface->current_mode, start_chan);
1136
1137 if (!start_freq) {
1138 wpa_printf(MSG_ERROR, "Frequency not present (seg1)");
1139 return 0;
1140 }
1141
1142 for (i = 0; i < chan_num; i++) {
1143 int freq = start_freq + i * 20;
1144
1145 err = hostapd_is_usable_chan(iface, freq, freq == iface->freq);
1146 if (err <= 0) {
1147 wpa_printf(MSG_ERROR,
1148 "Frequency %d is not allowed (seg1)",
1149 freq);
1150 return err;
1151 }
1152 }
1153
1154 return 1;
1155 }
1156
1157
1158 /* Returns:
1159 * 1 = usable
1160 * 0 = not usable
1161 * -1 = not currently usable due to 6 GHz NO-IR
1162 */
hostapd_is_usable_chans(struct hostapd_iface * iface)1163 int hostapd_is_usable_chans(struct hostapd_iface *iface)
1164 {
1165 int secondary_freq, new_sec;
1166 enum hostapd_chan_width_attr bw_flag;
1167 struct hostapd_channel_data *pri_chan;
1168 int err, err2, central, oper_chwidth;
1169
1170 if (!iface->current_mode)
1171 return 0;
1172 pri_chan = hw_get_channel_freq(iface->current_mode->mode,
1173 iface->freq, NULL,
1174 iface->hw_features,
1175 iface->num_hw_features);
1176 if (!pri_chan) {
1177 wpa_printf(MSG_ERROR, "Primary frequency not present");
1178 return 0;
1179 }
1180
1181 err = hostapd_is_usable_edmg(iface);
1182 if (err <= 0)
1183 return err;
1184
1185 if (!hostapd_is_usable_punct_bitmap(iface))
1186 return 0;
1187
1188 oper_chwidth = hostapd_get_oper_chwidth(iface->conf);
1189
1190 /*
1191 * The central channel is not filled in acs_adjust_center_freq() after
1192 * ACS of 80+80 MHz. In that case we only check the primary 40 MHz.
1193 */
1194 central = hostapd_get_oper_centr_freq_seg0_idx(iface->conf);
1195
1196 if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&
1197 oper_chwidth != CONF_OPER_CHWIDTH_USE_HT && central)
1198 return hostapd_is_usable_chan_seg(iface);
1199
1200 err = hostapd_is_usable_chan(iface, pri_chan->freq, 1);
1201 if (err <= 0) {
1202 wpa_printf(MSG_ERROR, "Primary frequency not allowed");
1203 return err;
1204 }
1205
1206 if (!iface->conf->secondary_channel)
1207 return 1;
1208
1209 err = hostapd_is_usable_chan(iface, iface->freq +
1210 iface->conf->secondary_channel * 20, 0);
1211 if (err > 0) {
1212 if (iface->conf->secondary_channel == 1 &&
1213 (pri_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40P))
1214 return 1;
1215 if (iface->conf->secondary_channel == -1 &&
1216 (pri_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40M))
1217 return 1;
1218 }
1219 if (!iface->conf->ht40_plus_minus_allowed)
1220 return err;
1221
1222 /* Both HT40+ and HT40- are set, check the swapped pri/sec channel
1223 * option for a 40 MHz channel */
1224 new_sec = -iface->conf->secondary_channel;
1225 bw_flag = new_sec == 1 ?
1226 HOSTAPD_CHAN_WIDTH_40P : HOSTAPD_CHAN_WIDTH_40M;
1227
1228 secondary_freq = iface->freq + new_sec * 20;
1229 err2 = hostapd_is_usable_chan(iface, secondary_freq, 0);
1230 if (err2 <= 0)
1231 return err;
1232
1233 if (pri_chan->allowed_bw & bw_flag) {
1234 iface->conf->secondary_channel = new_sec;
1235 return 1;
1236 }
1237
1238 return err;
1239 }
1240
1241
skip_mode(struct hostapd_iface * iface,struct hostapd_hw_modes * mode)1242 static bool skip_mode(struct hostapd_iface *iface,
1243 struct hostapd_hw_modes *mode)
1244 {
1245 int chan;
1246
1247 if (iface->freq > 0 && !hw_mode_get_channel(mode, iface->freq, &chan))
1248 return true;
1249
1250 if (is_6ghz_op_class(iface->conf->op_class) && iface->freq == 0 &&
1251 !mode->is_6ghz)
1252 return true;
1253
1254 return false;
1255 }
1256
1257
hostapd_determine_mode(struct hostapd_iface * iface)1258 int hostapd_determine_mode(struct hostapd_iface *iface)
1259 {
1260 int i;
1261 enum hostapd_hw_mode target_mode;
1262
1263 if (iface->current_mode ||
1264 iface->conf->hw_mode != HOSTAPD_MODE_IEEE80211ANY)
1265 return 0;
1266
1267 if (iface->freq < 4000)
1268 target_mode = HOSTAPD_MODE_IEEE80211G;
1269 else if (iface->freq > 50000)
1270 target_mode = HOSTAPD_MODE_IEEE80211AD;
1271 else
1272 target_mode = HOSTAPD_MODE_IEEE80211A;
1273
1274 for (i = 0; i < iface->num_hw_features; i++) {
1275 struct hostapd_hw_modes *mode;
1276
1277 mode = &iface->hw_features[i];
1278 if (mode->mode == target_mode) {
1279 if (skip_mode(iface, mode))
1280 continue;
1281
1282 iface->current_mode = mode;
1283 iface->conf->hw_mode = mode->mode;
1284 break;
1285 }
1286 }
1287
1288 if (!iface->current_mode) {
1289 wpa_printf(MSG_ERROR, "ACS/CSA: Cannot decide mode");
1290 return -1;
1291 }
1292 return 0;
1293 }
1294
1295
1296 static enum hostapd_chan_status
hostapd_check_chans(struct hostapd_iface * iface)1297 hostapd_check_chans(struct hostapd_iface *iface)
1298 {
1299 if (iface->freq) {
1300 int err;
1301
1302 hostapd_determine_mode(iface);
1303
1304 err = hostapd_is_usable_chans(iface);
1305 if (err <= 0) {
1306 if (!err)
1307 return HOSTAPD_CHAN_INVALID;
1308 return HOSTAPD_CHAN_INVALID_NO_IR;
1309 }
1310 return HOSTAPD_CHAN_VALID;
1311 }
1312
1313 /*
1314 * The user set channel=0 or channel=acs_survey
1315 * which is used to trigger ACS.
1316 */
1317
1318 switch (acs_init(iface)) {
1319 case HOSTAPD_CHAN_ACS:
1320 return HOSTAPD_CHAN_ACS;
1321 case HOSTAPD_CHAN_INVALID_NO_IR:
1322 return HOSTAPD_CHAN_INVALID_NO_IR;
1323 case HOSTAPD_CHAN_VALID:
1324 case HOSTAPD_CHAN_INVALID:
1325 default:
1326 return HOSTAPD_CHAN_INVALID;
1327 }
1328 }
1329
1330
hostapd_notify_bad_chans(struct hostapd_iface * iface)1331 static void hostapd_notify_bad_chans(struct hostapd_iface *iface)
1332 {
1333 if (!iface->current_mode) {
1334 hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,
1335 HOSTAPD_LEVEL_WARNING,
1336 "Hardware does not support configured mode");
1337 return;
1338 }
1339 hostapd_logger(iface->bss[0], NULL,
1340 HOSTAPD_MODULE_IEEE80211,
1341 HOSTAPD_LEVEL_WARNING,
1342 "Configured channel (%d) or frequency (%d) (secondary_channel=%d) not found from the channel list of the current mode (%d) %s",
1343 iface->conf->channel,
1344 iface->freq, iface->conf->secondary_channel,
1345 iface->current_mode->mode,
1346 hostapd_hw_mode_txt(iface->current_mode->mode));
1347 hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,
1348 HOSTAPD_LEVEL_WARNING,
1349 "Hardware does not support configured channel");
1350 }
1351
1352
hostapd_acs_completed(struct hostapd_iface * iface,int err)1353 int hostapd_acs_completed(struct hostapd_iface *iface, int err)
1354 {
1355 int ret = -1;
1356
1357 if (err)
1358 goto out;
1359
1360 switch (hostapd_check_chans(iface)) {
1361 case HOSTAPD_CHAN_VALID:
1362 iface->is_no_ir = false;
1363 wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO,
1364 ACS_EVENT_COMPLETED "freq=%d channel=%d",
1365 iface->freq, iface->conf->channel);
1366 break;
1367 case HOSTAPD_CHAN_ACS:
1368 wpa_printf(MSG_ERROR, "ACS error - reported complete, but no result available");
1369 wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED);
1370 hostapd_notify_bad_chans(iface);
1371 goto out;
1372 case HOSTAPD_CHAN_INVALID_NO_IR:
1373 iface->is_no_ir = true;
1374 /* fall through */
1375 case HOSTAPD_CHAN_INVALID:
1376 default:
1377 wpa_printf(MSG_ERROR, "ACS picked unusable channels");
1378 wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED);
1379 hostapd_notify_bad_chans(iface);
1380 goto out;
1381 }
1382
1383 ret = hostapd_check_ht_capab(iface);
1384 if (ret < 0)
1385 goto out;
1386 if (ret == 1) {
1387 wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback");
1388 return 0;
1389 }
1390
1391 ret = 0;
1392 out:
1393 return hostapd_setup_interface_complete(iface, ret);
1394 }
1395
1396
1397 /**
1398 * hostapd_csa_update_hwmode - Update hardware mode
1399 * @iface: Pointer to interface data.
1400 * Returns: 0 on success, < 0 on failure
1401 *
1402 * Update hardware mode when the operating channel changed because of CSA.
1403 */
hostapd_csa_update_hwmode(struct hostapd_iface * iface)1404 int hostapd_csa_update_hwmode(struct hostapd_iface *iface)
1405 {
1406 if (!iface || !iface->conf)
1407 return -1;
1408
1409 iface->current_mode = NULL;
1410 iface->conf->hw_mode = HOSTAPD_MODE_IEEE80211ANY;
1411
1412 return hostapd_determine_mode(iface);
1413 }
1414
1415
1416 /**
1417 * hostapd_select_hw_mode - Select the hardware mode
1418 * @iface: Pointer to interface data.
1419 * Returns: 0 on success, < 0 on failure
1420 *
1421 * Sets up the hardware mode, channel, rates, and passive scanning
1422 * based on the configuration.
1423 */
hostapd_select_hw_mode(struct hostapd_iface * iface)1424 int hostapd_select_hw_mode(struct hostapd_iface *iface)
1425 {
1426 int i;
1427
1428 if (iface->num_hw_features < 1)
1429 return -1;
1430
1431 if ((iface->conf->hw_mode == HOSTAPD_MODE_IEEE80211G ||
1432 iface->conf->ieee80211n || iface->conf->ieee80211ac ||
1433 iface->conf->ieee80211ax || iface->conf->ieee80211be) &&
1434 iface->conf->channel == 14) {
1435 wpa_printf(MSG_INFO, "Disable OFDM/HT/VHT/HE/EHT on channel 14");
1436 iface->conf->hw_mode = HOSTAPD_MODE_IEEE80211B;
1437 iface->conf->ieee80211n = 0;
1438 iface->conf->ieee80211ac = 0;
1439 iface->conf->ieee80211ax = 0;
1440 iface->conf->ieee80211be = 0;
1441 }
1442
1443 iface->current_mode = NULL;
1444 for (i = 0; i < iface->num_hw_features; i++) {
1445 struct hostapd_hw_modes *mode = &iface->hw_features[i];
1446
1447 if (mode->mode == iface->conf->hw_mode) {
1448 if (skip_mode(iface, mode))
1449 continue;
1450
1451 iface->current_mode = mode;
1452 break;
1453 }
1454 }
1455
1456 if (iface->current_mode == NULL) {
1457 if ((iface->drv_flags & WPA_DRIVER_FLAGS_ACS_OFFLOAD) &&
1458 (iface->drv_flags & WPA_DRIVER_FLAGS_SUPPORT_HW_MODE_ANY)) {
1459 wpa_printf(MSG_DEBUG,
1460 "Using offloaded hw_mode=any ACS");
1461 } else if (!(iface->drv_flags & WPA_DRIVER_FLAGS_ACS_OFFLOAD) &&
1462 iface->conf->hw_mode == HOSTAPD_MODE_IEEE80211ANY) {
1463 wpa_printf(MSG_DEBUG,
1464 "Using internal ACS for hw_mode=any");
1465 } else {
1466 wpa_printf(MSG_ERROR,
1467 "Hardware does not support configured mode");
1468 hostapd_logger(iface->bss[0], NULL,
1469 HOSTAPD_MODULE_IEEE80211,
1470 HOSTAPD_LEVEL_WARNING,
1471 "Hardware does not support configured mode (%d) (hw_mode in hostapd.conf)",
1472 (int) iface->conf->hw_mode);
1473 return -2;
1474 }
1475 }
1476
1477 switch (hostapd_check_chans(iface)) {
1478 case HOSTAPD_CHAN_VALID:
1479 iface->is_no_ir = false;
1480 return 0;
1481 case HOSTAPD_CHAN_ACS: /* ACS will run and later complete */
1482 return 1;
1483 case HOSTAPD_CHAN_INVALID_NO_IR:
1484 iface->is_no_ir = true;
1485 /* fall through */
1486 case HOSTAPD_CHAN_INVALID:
1487 default:
1488 hostapd_notify_bad_chans(iface);
1489 return -3;
1490 }
1491 }
1492
1493
hostapd_hw_mode_txt(int mode)1494 const char * hostapd_hw_mode_txt(int mode)
1495 {
1496 switch (mode) {
1497 case HOSTAPD_MODE_IEEE80211A:
1498 return "IEEE 802.11a";
1499 case HOSTAPD_MODE_IEEE80211B:
1500 return "IEEE 802.11b";
1501 case HOSTAPD_MODE_IEEE80211G:
1502 return "IEEE 802.11g";
1503 case HOSTAPD_MODE_IEEE80211AD:
1504 return "IEEE 802.11ad";
1505 default:
1506 return "UNKNOWN";
1507 }
1508 }
1509
1510
hostapd_hw_get_freq(struct hostapd_data * hapd,int chan)1511 int hostapd_hw_get_freq(struct hostapd_data *hapd, int chan)
1512 {
1513 return hw_get_freq(hapd->iface->current_mode, chan);
1514 }
1515
1516
hostapd_hw_get_channel(struct hostapd_data * hapd,int freq)1517 int hostapd_hw_get_channel(struct hostapd_data *hapd, int freq)
1518 {
1519 int i, channel;
1520 struct hostapd_hw_modes *mode;
1521
1522 if (hapd->iface->current_mode) {
1523 channel = hw_get_chan(hapd->iface->current_mode->mode, freq,
1524 hapd->iface->hw_features,
1525 hapd->iface->num_hw_features);
1526 if (channel)
1527 return channel;
1528 }
1529
1530 /* Check other available modes since the channel list for the current
1531 * mode did not include the specified frequency. */
1532 if (!hapd->iface->hw_features)
1533 return 0;
1534 for (i = 0; i < hapd->iface->num_hw_features; i++) {
1535 mode = &hapd->iface->hw_features[i];
1536 channel = hw_get_chan(mode->mode, freq,
1537 hapd->iface->hw_features,
1538 hapd->iface->num_hw_features);
1539 if (channel)
1540 return channel;
1541 }
1542 return 0;
1543 }
1544
1545
hostapd_hw_skip_mode(struct hostapd_iface * iface,struct hostapd_hw_modes * mode)1546 int hostapd_hw_skip_mode(struct hostapd_iface *iface,
1547 struct hostapd_hw_modes *mode)
1548 {
1549 int i;
1550
1551 if (iface->current_mode)
1552 return mode != iface->current_mode;
1553 if (mode->mode != HOSTAPD_MODE_IEEE80211B)
1554 return 0;
1555 for (i = 0; i < iface->num_hw_features; i++) {
1556 if (iface->hw_features[i].mode == HOSTAPD_MODE_IEEE80211G)
1557 return 1;
1558 }
1559 return 0;
1560 }
1561
1562
hostapd_free_multi_hw_info(struct hostapd_multi_hw_info * multi_hw_info)1563 void hostapd_free_multi_hw_info(struct hostapd_multi_hw_info *multi_hw_info)
1564 {
1565 os_free(multi_hw_info);
1566 }
1567
1568
hostapd_set_current_hw_info(struct hostapd_iface * iface,int oper_freq)1569 int hostapd_set_current_hw_info(struct hostapd_iface *iface, int oper_freq)
1570 {
1571 struct hostapd_multi_hw_info *hw_info;
1572 unsigned int i;
1573
1574 if (!iface->num_multi_hws)
1575 return 0;
1576
1577 for (i = 0; i < iface->num_multi_hws; i++) {
1578 hw_info = &iface->multi_hw_info[i];
1579
1580 if (hw_info->start_freq <= oper_freq &&
1581 hw_info->end_freq >= oper_freq) {
1582 iface->current_hw_info = hw_info;
1583 wpa_printf(MSG_DEBUG,
1584 "Mode: Selected underlying hardware: hw_idx=%u",
1585 iface->current_hw_info->hw_idx);
1586 return 0;
1587 }
1588 }
1589
1590 return -1;
1591 }
1592