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Commit | Line | Data |
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6fc6879b JM |
1 | /* |
2 | * hostapd / Hardware feature query and different modes | |
3 | * Copyright 2002-2003, Instant802 Networks, Inc. | |
4 | * Copyright 2005-2006, Devicescape Software, Inc. | |
7fa56233 | 5 | * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi> |
6fc6879b | 6 | * |
5f9c134a JM |
7 | * This software may be distributed under the terms of the BSD license. |
8 | * See README for more details. | |
6fc6879b JM |
9 | */ |
10 | ||
1057d78e | 11 | #include "utils/includes.h" |
6fc6879b | 12 | |
1057d78e JM |
13 | #include "utils/common.h" |
14 | #include "utils/eloop.h" | |
90973fb2 JM |
15 | #include "common/ieee802_11_defs.h" |
16 | #include "common/ieee802_11_common.h" | |
ae134e1d | 17 | #include "common/wpa_ctrl.h" |
6226e38d JM |
18 | #include "hostapd.h" |
19 | #include "ap_config.h" | |
6e6e8c31 | 20 | #include "ap_drv_ops.h" |
50f4f2a0 | 21 | #include "acs.h" |
9c47f6a2 PX |
22 | #include "ieee802_11.h" |
23 | #include "beacon.h" | |
6226e38d | 24 | #include "hw_features.h" |
6fc6879b JM |
25 | |
26 | ||
27 | void hostapd_free_hw_features(struct hostapd_hw_modes *hw_features, | |
28 | size_t num_hw_features) | |
29 | { | |
30 | size_t i; | |
31 | ||
32 | if (hw_features == NULL) | |
33 | return; | |
34 | ||
35 | for (i = 0; i < num_hw_features; i++) { | |
36 | os_free(hw_features[i].channels); | |
37 | os_free(hw_features[i].rates); | |
38 | } | |
39 | ||
40 | os_free(hw_features); | |
41 | } | |
42 | ||
43 | ||
e76da505 JD |
44 | #ifndef CONFIG_NO_STDOUT_DEBUG |
45 | static char * dfs_info(struct hostapd_channel_data *chan) | |
46 | { | |
47 | static char info[256]; | |
48 | char *state; | |
49 | ||
50 | switch (chan->flag & HOSTAPD_CHAN_DFS_MASK) { | |
51 | case HOSTAPD_CHAN_DFS_UNKNOWN: | |
52 | state = "unknown"; | |
53 | break; | |
54 | case HOSTAPD_CHAN_DFS_USABLE: | |
55 | state = "usable"; | |
56 | break; | |
57 | case HOSTAPD_CHAN_DFS_UNAVAILABLE: | |
58 | state = "unavailable"; | |
59 | break; | |
60 | case HOSTAPD_CHAN_DFS_AVAILABLE: | |
61 | state = "available"; | |
62 | break; | |
63 | default: | |
64 | return ""; | |
65 | } | |
66 | os_snprintf(info, sizeof(info), " (DFS state = %s)", state); | |
67 | info[sizeof(info) - 1] = '\0'; | |
68 | ||
69 | return info; | |
70 | } | |
71 | #endif /* CONFIG_NO_STDOUT_DEBUG */ | |
72 | ||
73 | ||
6fc6879b JM |
74 | int hostapd_get_hw_features(struct hostapd_iface *iface) |
75 | { | |
76 | struct hostapd_data *hapd = iface->bss[0]; | |
77 | int ret = 0, i, j; | |
78 | u16 num_modes, flags; | |
79 | struct hostapd_hw_modes *modes; | |
80 | ||
85141289 JM |
81 | if (hostapd_drv_none(hapd)) |
82 | return -1; | |
6fc6879b JM |
83 | modes = hostapd_get_hw_feature_data(hapd, &num_modes, &flags); |
84 | if (modes == NULL) { | |
85 | hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211, | |
86 | HOSTAPD_LEVEL_DEBUG, | |
87 | "Fetching hardware channel/rate support not " | |
88 | "supported."); | |
89 | return -1; | |
90 | } | |
91 | ||
92 | iface->hw_flags = flags; | |
93 | ||
94 | hostapd_free_hw_features(iface->hw_features, iface->num_hw_features); | |
95 | iface->hw_features = modes; | |
96 | iface->num_hw_features = num_modes; | |
97 | ||
98 | for (i = 0; i < num_modes; i++) { | |
99 | struct hostapd_hw_modes *feature = &modes[i]; | |
e76da505 JD |
100 | int dfs_enabled = hapd->iconf->ieee80211h && |
101 | (iface->drv_flags & WPA_DRIVER_FLAGS_RADAR); | |
102 | ||
6fc6879b JM |
103 | /* set flag for channels we can use in current regulatory |
104 | * domain */ | |
105 | for (j = 0; j < feature->num_channels; j++) { | |
e76da505 JD |
106 | int dfs = 0; |
107 | ||
10b83bd7 JM |
108 | /* |
109 | * Disable all channels that are marked not to allow | |
e76da505 JD |
110 | * IBSS operation or active scanning. |
111 | * Use radar channels only if the driver supports DFS. | |
10b83bd7 | 112 | */ |
e76da505 JD |
113 | if ((feature->channels[j].flag & |
114 | HOSTAPD_CHAN_RADAR) && dfs_enabled) { | |
115 | dfs = 1; | |
70634eec AS |
116 | } else if (((feature->channels[j].flag & |
117 | HOSTAPD_CHAN_RADAR) && | |
118 | !(iface->drv_flags & | |
119 | WPA_DRIVER_FLAGS_DFS_OFFLOAD)) || | |
120 | (feature->channels[j].flag & | |
121 | (HOSTAPD_CHAN_NO_IBSS | | |
122 | HOSTAPD_CHAN_PASSIVE_SCAN))) { | |
6fc6879b | 123 | feature->channels[j].flag |= |
10b83bd7 | 124 | HOSTAPD_CHAN_DISABLED; |
e76da505 JD |
125 | } |
126 | ||
10b83bd7 JM |
127 | if (feature->channels[j].flag & HOSTAPD_CHAN_DISABLED) |
128 | continue; | |
e76da505 | 129 | |
10b83bd7 | 130 | wpa_printf(MSG_MSGDUMP, "Allowed channel: mode=%d " |
e76da505 | 131 | "chan=%d freq=%d MHz max_tx_power=%d dBm%s", |
10b83bd7 JM |
132 | feature->mode, |
133 | feature->channels[j].chan, | |
bf01d8bc | 134 | feature->channels[j].freq, |
e76da505 JD |
135 | feature->channels[j].max_tx_power, |
136 | dfs ? dfs_info(&feature->channels[j]) : ""); | |
6fc6879b JM |
137 | } |
138 | } | |
139 | ||
140 | return ret; | |
141 | } | |
142 | ||
143 | ||
34445d12 | 144 | int hostapd_prepare_rates(struct hostapd_iface *iface, |
5a5009dc | 145 | struct hostapd_hw_modes *mode) |
6fc6879b JM |
146 | { |
147 | int i, num_basic_rates = 0; | |
148 | int basic_rates_a[] = { 60, 120, 240, -1 }; | |
149 | int basic_rates_b[] = { 10, 20, -1 }; | |
150 | int basic_rates_g[] = { 10, 20, 55, 110, -1 }; | |
151 | int *basic_rates; | |
152 | ||
34445d12 JM |
153 | if (iface->conf->basic_rates) |
154 | basic_rates = iface->conf->basic_rates; | |
6fc6879b JM |
155 | else switch (mode->mode) { |
156 | case HOSTAPD_MODE_IEEE80211A: | |
157 | basic_rates = basic_rates_a; | |
158 | break; | |
159 | case HOSTAPD_MODE_IEEE80211B: | |
160 | basic_rates = basic_rates_b; | |
161 | break; | |
162 | case HOSTAPD_MODE_IEEE80211G: | |
163 | basic_rates = basic_rates_g; | |
164 | break; | |
7829894c VK |
165 | case HOSTAPD_MODE_IEEE80211AD: |
166 | return 0; /* No basic rates for 11ad */ | |
6fc6879b JM |
167 | default: |
168 | return -1; | |
169 | } | |
170 | ||
e5693c47 JM |
171 | i = 0; |
172 | while (basic_rates[i] >= 0) | |
173 | i++; | |
f0898e95 JM |
174 | if (i) |
175 | i++; /* -1 termination */ | |
34445d12 | 176 | os_free(iface->basic_rates); |
78018ae9 | 177 | iface->basic_rates = os_malloc(i * sizeof(int)); |
34445d12 | 178 | if (iface->basic_rates) |
78018ae9 | 179 | os_memcpy(iface->basic_rates, basic_rates, i * sizeof(int)); |
6fc6879b | 180 | |
34445d12 JM |
181 | os_free(iface->current_rates); |
182 | iface->num_rates = 0; | |
6fc6879b | 183 | |
34445d12 | 184 | iface->current_rates = |
f9884c09 | 185 | os_calloc(mode->num_rates, sizeof(struct hostapd_rate_data)); |
34445d12 | 186 | if (!iface->current_rates) { |
6fc6879b JM |
187 | wpa_printf(MSG_ERROR, "Failed to allocate memory for rate " |
188 | "table."); | |
189 | return -1; | |
190 | } | |
191 | ||
192 | for (i = 0; i < mode->num_rates; i++) { | |
193 | struct hostapd_rate_data *rate; | |
194 | ||
34445d12 JM |
195 | if (iface->conf->supported_rates && |
196 | !hostapd_rate_found(iface->conf->supported_rates, | |
fb7842aa | 197 | mode->rates[i])) |
6fc6879b JM |
198 | continue; |
199 | ||
34445d12 | 200 | rate = &iface->current_rates[iface->num_rates]; |
fb7842aa | 201 | rate->rate = mode->rates[i]; |
6fc6879b JM |
202 | if (hostapd_rate_found(basic_rates, rate->rate)) { |
203 | rate->flags |= HOSTAPD_RATE_BASIC; | |
204 | num_basic_rates++; | |
fb7842aa | 205 | } |
6fc6879b | 206 | wpa_printf(MSG_DEBUG, "RATE[%d] rate=%d flags=0x%x", |
34445d12 JM |
207 | iface->num_rates, rate->rate, rate->flags); |
208 | iface->num_rates++; | |
6fc6879b JM |
209 | } |
210 | ||
34445d12 JM |
211 | if ((iface->num_rates == 0 || num_basic_rates == 0) && |
212 | (!iface->conf->ieee80211n || !iface->conf->require_ht)) { | |
6fc6879b JM |
213 | wpa_printf(MSG_ERROR, "No rates remaining in supported/basic " |
214 | "rate sets (%d,%d).", | |
34445d12 | 215 | iface->num_rates, num_basic_rates); |
6fc6879b JM |
216 | return -1; |
217 | } | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | ||
3e0cb2c5 JM |
223 | #ifdef CONFIG_IEEE80211N |
224 | static int ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface *iface) | |
225 | { | |
226 | int sec_chan, ok, j, first; | |
227 | int allowed[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157, | |
228 | 184, 192 }; | |
229 | size_t k; | |
230 | ||
231 | if (!iface->conf->secondary_channel) | |
232 | return 1; /* HT40 not used */ | |
233 | ||
234 | sec_chan = iface->conf->channel + iface->conf->secondary_channel * 4; | |
235 | wpa_printf(MSG_DEBUG, "HT40: control channel: %d " | |
236 | "secondary channel: %d", | |
237 | iface->conf->channel, sec_chan); | |
238 | ||
239 | /* Verify that HT40 secondary channel is an allowed 20 MHz | |
240 | * channel */ | |
241 | ok = 0; | |
242 | for (j = 0; j < iface->current_mode->num_channels; j++) { | |
243 | struct hostapd_channel_data *chan = | |
244 | &iface->current_mode->channels[j]; | |
245 | if (!(chan->flag & HOSTAPD_CHAN_DISABLED) && | |
246 | chan->chan == sec_chan) { | |
247 | ok = 1; | |
248 | break; | |
249 | } | |
250 | } | |
251 | if (!ok) { | |
252 | wpa_printf(MSG_ERROR, "HT40 secondary channel %d not allowed", | |
253 | sec_chan); | |
254 | return 0; | |
255 | } | |
256 | ||
257 | /* | |
258 | * Verify that HT40 primary,secondary channel pair is allowed per | |
259 | * IEEE 802.11n Annex J. This is only needed for 5 GHz band since | |
260 | * 2.4 GHz rules allow all cases where the secondary channel fits into | |
261 | * the list of allowed channels (already checked above). | |
262 | */ | |
263 | if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A) | |
264 | return 1; | |
265 | ||
266 | if (iface->conf->secondary_channel > 0) | |
267 | first = iface->conf->channel; | |
268 | else | |
269 | first = sec_chan; | |
270 | ||
271 | ok = 0; | |
e7ecab4a | 272 | for (k = 0; k < ARRAY_SIZE(allowed); k++) { |
3e0cb2c5 JM |
273 | if (first == allowed[k]) { |
274 | ok = 1; | |
275 | break; | |
276 | } | |
277 | } | |
278 | if (!ok) { | |
279 | wpa_printf(MSG_ERROR, "HT40 channel pair (%d, %d) not allowed", | |
280 | iface->conf->channel, | |
281 | iface->conf->secondary_channel); | |
282 | return 0; | |
283 | } | |
284 | ||
285 | return 1; | |
286 | } | |
30fd5f14 JM |
287 | |
288 | ||
5eb4e3d0 JM |
289 | static void ieee80211n_switch_pri_sec(struct hostapd_iface *iface) |
290 | { | |
291 | if (iface->conf->secondary_channel > 0) { | |
292 | iface->conf->channel += 4; | |
293 | iface->conf->secondary_channel = -1; | |
294 | } else { | |
295 | iface->conf->channel -= 4; | |
296 | iface->conf->secondary_channel = 1; | |
297 | } | |
298 | } | |
299 | ||
300 | ||
ad1e68e6 JM |
301 | static void ieee80211n_get_pri_sec_chan(struct wpa_scan_res *bss, |
302 | int *pri_chan, int *sec_chan) | |
303 | { | |
304 | struct ieee80211_ht_operation *oper; | |
305 | struct ieee802_11_elems elems; | |
306 | ||
307 | *pri_chan = *sec_chan = 0; | |
308 | ||
309 | ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0); | |
310 | if (elems.ht_operation && | |
311 | elems.ht_operation_len >= sizeof(*oper)) { | |
312 | oper = (struct ieee80211_ht_operation *) elems.ht_operation; | |
5583b8d1 JM |
313 | *pri_chan = oper->primary_chan; |
314 | if (oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) { | |
41619262 JM |
315 | int sec = oper->ht_param & |
316 | HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK; | |
317 | if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) | |
ad1e68e6 | 318 | *sec_chan = *pri_chan + 4; |
41619262 | 319 | else if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) |
ad1e68e6 JM |
320 | *sec_chan = *pri_chan - 4; |
321 | } | |
322 | } | |
323 | } | |
324 | ||
325 | ||
326 | static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface, | |
327 | struct wpa_scan_results *scan_res) | |
5eb4e3d0 JM |
328 | { |
329 | int pri_chan, sec_chan, pri_freq, sec_freq, pri_bss, sec_bss; | |
ad1e68e6 JM |
330 | int bss_pri_chan, bss_sec_chan; |
331 | size_t i; | |
5eb4e3d0 JM |
332 | int match; |
333 | ||
334 | pri_chan = iface->conf->channel; | |
49b74430 | 335 | sec_chan = pri_chan + iface->conf->secondary_channel * 4; |
5eb4e3d0 JM |
336 | pri_freq = hostapd_hw_get_freq(iface->bss[0], pri_chan); |
337 | if (iface->conf->secondary_channel > 0) | |
338 | sec_freq = pri_freq + 20; | |
339 | else | |
340 | sec_freq = pri_freq - 20; | |
341 | ||
5eb4e3d0 JM |
342 | /* |
343 | * Switch PRI/SEC channels if Beacons were detected on selected SEC | |
344 | * channel, but not on selected PRI channel. | |
345 | */ | |
346 | pri_bss = sec_bss = 0; | |
ad1e68e6 JM |
347 | for (i = 0; i < scan_res->num; i++) { |
348 | struct wpa_scan_res *bss = scan_res->res[i]; | |
349 | if (bss->freq == pri_freq) | |
5eb4e3d0 | 350 | pri_bss++; |
ad1e68e6 | 351 | else if (bss->freq == sec_freq) |
5eb4e3d0 JM |
352 | sec_bss++; |
353 | } | |
354 | if (sec_bss && !pri_bss) { | |
355 | wpa_printf(MSG_INFO, "Switch own primary and secondary " | |
356 | "channel to get secondary channel with no Beacons " | |
357 | "from other BSSes"); | |
358 | ieee80211n_switch_pri_sec(iface); | |
49b74430 | 359 | return 1; |
5eb4e3d0 JM |
360 | } |
361 | ||
362 | /* | |
363 | * Match PRI/SEC channel with any existing HT40 BSS on the same | |
364 | * channels that we are about to use (if already mixed order in | |
365 | * existing BSSes, use own preference). | |
366 | */ | |
367 | match = 0; | |
ad1e68e6 JM |
368 | for (i = 0; i < scan_res->num; i++) { |
369 | struct wpa_scan_res *bss = scan_res->res[i]; | |
370 | ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan); | |
371 | if (pri_chan == bss_pri_chan && | |
372 | sec_chan == bss_sec_chan) { | |
5eb4e3d0 JM |
373 | match = 1; |
374 | break; | |
375 | } | |
376 | } | |
377 | if (!match) { | |
ad1e68e6 JM |
378 | for (i = 0; i < scan_res->num; i++) { |
379 | struct wpa_scan_res *bss = scan_res->res[i]; | |
c6313c75 FF |
380 | ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan, |
381 | &bss_sec_chan); | |
ad1e68e6 JM |
382 | if (pri_chan == bss_sec_chan && |
383 | sec_chan == bss_pri_chan) { | |
5eb4e3d0 JM |
384 | wpa_printf(MSG_INFO, "Switch own primary and " |
385 | "secondary channel due to BSS " | |
386 | "overlap with " MACSTR, | |
ad1e68e6 | 387 | MAC2STR(bss->bssid)); |
5eb4e3d0 JM |
388 | ieee80211n_switch_pri_sec(iface); |
389 | break; | |
390 | } | |
391 | } | |
392 | } | |
393 | ||
394 | return 1; | |
395 | } | |
396 | ||
397 | ||
f41d55da RM |
398 | static int ieee80211n_check_20mhz_bss(struct wpa_scan_res *bss, int pri_freq, |
399 | int start, int end) | |
400 | { | |
401 | struct ieee802_11_elems elems; | |
402 | struct ieee80211_ht_operation *oper; | |
403 | ||
404 | if (bss->freq < start || bss->freq > end || bss->freq == pri_freq) | |
405 | return 0; | |
406 | ||
407 | ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0); | |
408 | if (!elems.ht_capabilities) { | |
409 | wpa_printf(MSG_DEBUG, "Found overlapping legacy BSS: " | |
410 | MACSTR " freq=%d", MAC2STR(bss->bssid), bss->freq); | |
411 | return 1; | |
412 | } | |
413 | ||
414 | if (elems.ht_operation && | |
415 | elems.ht_operation_len >= sizeof(*oper)) { | |
416 | oper = (struct ieee80211_ht_operation *) elems.ht_operation; | |
417 | if (oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK) | |
418 | return 0; | |
419 | ||
420 | wpa_printf(MSG_DEBUG, "Found overlapping 20 MHz HT BSS: " | |
421 | MACSTR " freq=%d", MAC2STR(bss->bssid), bss->freq); | |
422 | return 1; | |
423 | } | |
424 | return 0; | |
425 | } | |
426 | ||
427 | ||
ad1e68e6 JM |
428 | static int ieee80211n_check_40mhz_2g4(struct hostapd_iface *iface, |
429 | struct wpa_scan_results *scan_res) | |
5eb4e3d0 JM |
430 | { |
431 | int pri_freq, sec_freq; | |
432 | int affected_start, affected_end; | |
ad1e68e6 | 433 | size_t i; |
5eb4e3d0 JM |
434 | |
435 | pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel); | |
436 | if (iface->conf->secondary_channel > 0) | |
437 | sec_freq = pri_freq + 20; | |
438 | else | |
439 | sec_freq = pri_freq - 20; | |
440 | affected_start = (pri_freq + sec_freq) / 2 - 25; | |
441 | affected_end = (pri_freq + sec_freq) / 2 + 25; | |
442 | wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz", | |
443 | affected_start, affected_end); | |
ad1e68e6 JM |
444 | for (i = 0; i < scan_res->num; i++) { |
445 | struct wpa_scan_res *bss = scan_res->res[i]; | |
446 | int pri = bss->freq; | |
5eb4e3d0 | 447 | int sec = pri; |
ad1e68e6 | 448 | int sec_chan, pri_chan; |
9c47f6a2 | 449 | struct ieee802_11_elems elems; |
ad1e68e6 | 450 | |
f41d55da RM |
451 | /* Check for overlapping 20 MHz BSS */ |
452 | if (ieee80211n_check_20mhz_bss(bss, pri_freq, affected_start, | |
453 | affected_end)) { | |
454 | wpa_printf(MSG_DEBUG, | |
455 | "Overlapping 20 MHz BSS is found"); | |
456 | return 0; | |
457 | } | |
458 | ||
ad1e68e6 JM |
459 | ieee80211n_get_pri_sec_chan(bss, &pri_chan, &sec_chan); |
460 | ||
461 | if (sec_chan) { | |
462 | if (sec_chan < pri_chan) | |
5eb4e3d0 JM |
463 | sec = pri - 20; |
464 | else | |
465 | sec = pri + 20; | |
466 | } | |
467 | ||
468 | if ((pri < affected_start || pri > affected_end) && | |
469 | (sec < affected_start || sec > affected_end)) | |
470 | continue; /* not within affected channel range */ | |
471 | ||
ad1e68e6 JM |
472 | wpa_printf(MSG_DEBUG, "Neighboring BSS: " MACSTR |
473 | " freq=%d pri=%d sec=%d", | |
474 | MAC2STR(bss->bssid), bss->freq, pri_chan, sec_chan); | |
475 | ||
476 | if (sec_chan) { | |
5eb4e3d0 JM |
477 | if (pri_freq != pri || sec_freq != sec) { |
478 | wpa_printf(MSG_DEBUG, "40 MHz pri/sec " | |
479 | "mismatch with BSS " MACSTR | |
480 | " <%d,%d> (chan=%d%c) vs. <%d,%d>", | |
ad1e68e6 JM |
481 | MAC2STR(bss->bssid), |
482 | pri, sec, pri_chan, | |
5eb4e3d0 JM |
483 | sec > pri ? '+' : '-', |
484 | pri_freq, sec_freq); | |
485 | return 0; | |
486 | } | |
487 | } | |
488 | ||
9c47f6a2 PX |
489 | ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, |
490 | 0); | |
491 | if (elems.ht_capabilities && | |
492 | elems.ht_capabilities_len >= | |
493 | sizeof(struct ieee80211_ht_capabilities)) { | |
494 | struct ieee80211_ht_capabilities *ht_cap = | |
495 | (struct ieee80211_ht_capabilities *) | |
496 | elems.ht_capabilities; | |
497 | ||
498 | if (le_to_host16(ht_cap->ht_capabilities_info) & | |
499 | HT_CAP_INFO_40MHZ_INTOLERANT) { | |
500 | wpa_printf(MSG_DEBUG, | |
501 | "40 MHz Intolerant is set on channel %d in BSS " | |
502 | MACSTR, pri, MAC2STR(bss->bssid)); | |
503 | return 0; | |
504 | } | |
505 | } | |
5eb4e3d0 JM |
506 | } |
507 | ||
508 | return 1; | |
509 | } | |
510 | ||
511 | ||
ad1e68e6 | 512 | static void ieee80211n_check_scan(struct hostapd_iface *iface) |
5eb4e3d0 | 513 | { |
ad1e68e6 | 514 | struct wpa_scan_results *scan_res; |
5eb4e3d0 | 515 | int oper40; |
7615078c | 516 | int res; |
5eb4e3d0 | 517 | |
5eb4e3d0 | 518 | /* Check list of neighboring BSSes (from scan) to see whether 40 MHz is |
7fa56233 | 519 | * allowed per IEEE Std 802.11-2012, 10.15.3.2 */ |
5eb4e3d0 | 520 | |
ad1e68e6 JM |
521 | iface->scan_cb = NULL; |
522 | ||
523 | scan_res = hostapd_driver_get_scan_results(iface->bss[0]); | |
524 | if (scan_res == NULL) { | |
525 | hostapd_setup_interface_complete(iface, 1); | |
526 | return; | |
527 | } | |
528 | ||
5eb4e3d0 | 529 | if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A) |
ad1e68e6 | 530 | oper40 = ieee80211n_check_40mhz_5g(iface, scan_res); |
5eb4e3d0 | 531 | else |
ad1e68e6 JM |
532 | oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res); |
533 | wpa_scan_results_free(scan_res); | |
5eb4e3d0 | 534 | |
9c47f6a2 | 535 | iface->secondary_ch = iface->conf->secondary_channel; |
5eb4e3d0 JM |
536 | if (!oper40) { |
537 | wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on " | |
538 | "channel pri=%d sec=%d based on overlapping BSSes", | |
539 | iface->conf->channel, | |
540 | iface->conf->channel + | |
541 | iface->conf->secondary_channel * 4); | |
542 | iface->conf->secondary_channel = 0; | |
9c47f6a2 PX |
543 | if (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX) { |
544 | /* | |
545 | * TODO: Could consider scheduling another scan to check | |
546 | * if channel width can be changed if no coex reports | |
547 | * are received from associating stations. | |
548 | */ | |
549 | } | |
5eb4e3d0 | 550 | } |
ad1e68e6 | 551 | |
7615078c | 552 | res = ieee80211n_allowed_ht40_channel_pair(iface); |
9c47f6a2 PX |
553 | if (!res) { |
554 | iface->conf->secondary_channel = 0; | |
555 | wpa_printf(MSG_INFO, "Fallback to 20 MHz"); | |
556 | } | |
557 | ||
7615078c | 558 | hostapd_setup_interface_complete(iface, !res); |
ad1e68e6 JM |
559 | } |
560 | ||
561 | ||
7fa56233 JM |
562 | static void ieee80211n_scan_channels_2g4(struct hostapd_iface *iface, |
563 | struct wpa_driver_scan_params *params) | |
564 | { | |
565 | /* Scan only the affected frequency range */ | |
566 | int pri_freq, sec_freq; | |
567 | int affected_start, affected_end; | |
568 | int i, pos; | |
569 | struct hostapd_hw_modes *mode; | |
570 | ||
571 | if (iface->current_mode == NULL) | |
572 | return; | |
573 | ||
574 | pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel); | |
575 | if (iface->conf->secondary_channel > 0) | |
576 | sec_freq = pri_freq + 20; | |
577 | else | |
578 | sec_freq = pri_freq - 20; | |
579 | affected_start = (pri_freq + sec_freq) / 2 - 25; | |
580 | affected_end = (pri_freq + sec_freq) / 2 + 25; | |
581 | wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz", | |
582 | affected_start, affected_end); | |
583 | ||
584 | mode = iface->current_mode; | |
f9884c09 | 585 | params->freqs = os_calloc(mode->num_channels + 1, sizeof(int)); |
7fa56233 JM |
586 | if (params->freqs == NULL) |
587 | return; | |
588 | pos = 0; | |
589 | ||
590 | for (i = 0; i < mode->num_channels; i++) { | |
591 | struct hostapd_channel_data *chan = &mode->channels[i]; | |
592 | if (chan->flag & HOSTAPD_CHAN_DISABLED) | |
593 | continue; | |
594 | if (chan->freq < affected_start || | |
595 | chan->freq > affected_end) | |
596 | continue; | |
597 | params->freqs[pos++] = chan->freq; | |
598 | } | |
599 | } | |
600 | ||
601 | ||
afadaff9 JM |
602 | static void ieee80211n_scan_channels_5g(struct hostapd_iface *iface, |
603 | struct wpa_driver_scan_params *params) | |
604 | { | |
605 | /* Scan only the affected frequency range */ | |
606 | int pri_freq; | |
607 | int affected_start, affected_end; | |
608 | int i, pos; | |
609 | struct hostapd_hw_modes *mode; | |
610 | ||
611 | if (iface->current_mode == NULL) | |
612 | return; | |
613 | ||
614 | pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel); | |
615 | if (iface->conf->secondary_channel > 0) { | |
616 | affected_start = pri_freq - 10; | |
617 | affected_end = pri_freq + 30; | |
618 | } else { | |
619 | affected_start = pri_freq - 30; | |
620 | affected_end = pri_freq + 10; | |
621 | } | |
622 | wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz", | |
623 | affected_start, affected_end); | |
624 | ||
625 | mode = iface->current_mode; | |
626 | params->freqs = os_calloc(mode->num_channels + 1, sizeof(int)); | |
627 | if (params->freqs == NULL) | |
628 | return; | |
629 | pos = 0; | |
630 | ||
631 | for (i = 0; i < mode->num_channels; i++) { | |
632 | struct hostapd_channel_data *chan = &mode->channels[i]; | |
633 | if (chan->flag & HOSTAPD_CHAN_DISABLED) | |
634 | continue; | |
635 | if (chan->freq < affected_start || | |
636 | chan->freq > affected_end) | |
637 | continue; | |
638 | params->freqs[pos++] = chan->freq; | |
639 | } | |
640 | } | |
641 | ||
642 | ||
5f0bca77 PX |
643 | static void ap_ht40_scan_retry(void *eloop_data, void *user_data) |
644 | { | |
645 | #define HT2040_COEX_SCAN_RETRY 15 | |
646 | struct hostapd_iface *iface = eloop_data; | |
647 | struct wpa_driver_scan_params params; | |
648 | int ret; | |
649 | ||
650 | os_memset(¶ms, 0, sizeof(params)); | |
651 | if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) | |
652 | ieee80211n_scan_channels_2g4(iface, ¶ms); | |
653 | else | |
654 | ieee80211n_scan_channels_5g(iface, ¶ms); | |
655 | ||
656 | ret = hostapd_driver_scan(iface->bss[0], ¶ms); | |
657 | iface->num_ht40_scan_tries++; | |
658 | os_free(params.freqs); | |
659 | ||
660 | if (ret == -EBUSY && | |
661 | iface->num_ht40_scan_tries < HT2040_COEX_SCAN_RETRY) { | |
662 | wpa_printf(MSG_ERROR, | |
663 | "Failed to request a scan of neighboring BSSes ret=%d (%s) - try to scan again (attempt %d)", | |
664 | ret, strerror(-ret), iface->num_ht40_scan_tries); | |
665 | eloop_register_timeout(1, 0, ap_ht40_scan_retry, iface, NULL); | |
666 | return; | |
667 | } | |
668 | ||
669 | if (ret == 0) { | |
670 | iface->scan_cb = ieee80211n_check_scan; | |
671 | return; | |
672 | } | |
673 | ||
674 | wpa_printf(MSG_DEBUG, | |
675 | "Failed to request a scan in device, bringing up in HT20 mode"); | |
676 | iface->conf->secondary_channel = 0; | |
677 | iface->conf->ht_capab &= ~HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET; | |
678 | hostapd_setup_interface_complete(iface, 0); | |
679 | } | |
680 | ||
681 | ||
682 | void hostapd_stop_setup_timers(struct hostapd_iface *iface) | |
683 | { | |
684 | eloop_cancel_timeout(ap_ht40_scan_retry, iface, NULL); | |
685 | } | |
686 | ||
687 | ||
ad1e68e6 JM |
688 | static int ieee80211n_check_40mhz(struct hostapd_iface *iface) |
689 | { | |
690 | struct wpa_driver_scan_params params; | |
5f0bca77 | 691 | int ret; |
ad1e68e6 JM |
692 | |
693 | if (!iface->conf->secondary_channel) | |
694 | return 0; /* HT40 not used */ | |
695 | ||
e1c5faf0 | 696 | hostapd_set_state(iface, HAPD_IFACE_HT_SCAN); |
ad1e68e6 JM |
697 | wpa_printf(MSG_DEBUG, "Scan for neighboring BSSes prior to enabling " |
698 | "40 MHz channel"); | |
699 | os_memset(¶ms, 0, sizeof(params)); | |
7fa56233 JM |
700 | if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) |
701 | ieee80211n_scan_channels_2g4(iface, ¶ms); | |
afadaff9 JM |
702 | else |
703 | ieee80211n_scan_channels_5g(iface, ¶ms); | |
5f0bca77 PX |
704 | |
705 | ret = hostapd_driver_scan(iface->bss[0], ¶ms); | |
706 | os_free(params.freqs); | |
707 | ||
708 | if (ret == -EBUSY) { | |
709 | wpa_printf(MSG_ERROR, | |
710 | "Failed to request a scan of neighboring BSSes ret=%d (%s) - try to scan again", | |
711 | ret, strerror(-ret)); | |
712 | iface->num_ht40_scan_tries = 1; | |
713 | eloop_cancel_timeout(ap_ht40_scan_retry, iface, NULL); | |
714 | eloop_register_timeout(1, 0, ap_ht40_scan_retry, iface, NULL); | |
715 | return 1; | |
716 | } | |
717 | ||
718 | if (ret < 0) { | |
719 | wpa_printf(MSG_ERROR, | |
720 | "Failed to request a scan of neighboring BSSes ret=%d (%s)", | |
721 | ret, strerror(-ret)); | |
ad1e68e6 JM |
722 | return -1; |
723 | } | |
724 | ||
725 | iface->scan_cb = ieee80211n_check_scan; | |
726 | return 1; | |
5eb4e3d0 JM |
727 | } |
728 | ||
729 | ||
30fd5f14 JM |
730 | static int ieee80211n_supported_ht_capab(struct hostapd_iface *iface) |
731 | { | |
732 | u16 hw = iface->current_mode->ht_capab; | |
733 | u16 conf = iface->conf->ht_capab; | |
734 | ||
30fd5f14 JM |
735 | if ((conf & HT_CAP_INFO_LDPC_CODING_CAP) && |
736 | !(hw & HT_CAP_INFO_LDPC_CODING_CAP)) { | |
737 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
738 | "HT capability [LDPC]"); | |
739 | return 0; | |
740 | } | |
741 | ||
742 | if ((conf & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) && | |
743 | !(hw & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) { | |
744 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
745 | "HT capability [HT40*]"); | |
746 | return 0; | |
747 | } | |
748 | ||
04ee647d EP |
749 | switch (conf & HT_CAP_INFO_SMPS_MASK) { |
750 | case HT_CAP_INFO_SMPS_STATIC: | |
751 | if (!(iface->smps_modes & WPA_DRIVER_SMPS_MODE_STATIC)) { | |
752 | wpa_printf(MSG_ERROR, | |
753 | "Driver does not support configured HT capability [SMPS-STATIC]"); | |
754 | return 0; | |
755 | } | |
756 | break; | |
757 | case HT_CAP_INFO_SMPS_DYNAMIC: | |
758 | if (!(iface->smps_modes & WPA_DRIVER_SMPS_MODE_DYNAMIC)) { | |
759 | wpa_printf(MSG_ERROR, | |
760 | "Driver does not support configured HT capability [SMPS-DYNAMIC]"); | |
761 | return 0; | |
762 | } | |
763 | break; | |
764 | case HT_CAP_INFO_SMPS_DISABLED: | |
765 | default: | |
766 | break; | |
30fd5f14 JM |
767 | } |
768 | ||
769 | if ((conf & HT_CAP_INFO_GREEN_FIELD) && | |
770 | !(hw & HT_CAP_INFO_GREEN_FIELD)) { | |
771 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
772 | "HT capability [GF]"); | |
773 | return 0; | |
774 | } | |
775 | ||
776 | if ((conf & HT_CAP_INFO_SHORT_GI20MHZ) && | |
777 | !(hw & HT_CAP_INFO_SHORT_GI20MHZ)) { | |
778 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
779 | "HT capability [SHORT-GI-20]"); | |
780 | return 0; | |
781 | } | |
782 | ||
783 | if ((conf & HT_CAP_INFO_SHORT_GI40MHZ) && | |
784 | !(hw & HT_CAP_INFO_SHORT_GI40MHZ)) { | |
785 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
786 | "HT capability [SHORT-GI-40]"); | |
787 | return 0; | |
788 | } | |
789 | ||
790 | if ((conf & HT_CAP_INFO_TX_STBC) && !(hw & HT_CAP_INFO_TX_STBC)) { | |
791 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
792 | "HT capability [TX-STBC]"); | |
793 | return 0; | |
794 | } | |
795 | ||
796 | if ((conf & HT_CAP_INFO_RX_STBC_MASK) > | |
797 | (hw & HT_CAP_INFO_RX_STBC_MASK)) { | |
798 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
799 | "HT capability [RX-STBC*]"); | |
800 | return 0; | |
801 | } | |
802 | ||
803 | if ((conf & HT_CAP_INFO_DELAYED_BA) && | |
804 | !(hw & HT_CAP_INFO_DELAYED_BA)) { | |
805 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
806 | "HT capability [DELAYED-BA]"); | |
807 | return 0; | |
808 | } | |
809 | ||
810 | if ((conf & HT_CAP_INFO_MAX_AMSDU_SIZE) && | |
811 | !(hw & HT_CAP_INFO_MAX_AMSDU_SIZE)) { | |
812 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
813 | "HT capability [MAX-AMSDU-7935]"); | |
814 | return 0; | |
815 | } | |
816 | ||
817 | if ((conf & HT_CAP_INFO_DSSS_CCK40MHZ) && | |
818 | !(hw & HT_CAP_INFO_DSSS_CCK40MHZ)) { | |
819 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
820 | "HT capability [DSSS_CCK-40]"); | |
821 | return 0; | |
822 | } | |
823 | ||
30fd5f14 JM |
824 | if ((conf & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT) && |
825 | !(hw & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT)) { | |
826 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
827 | "HT capability [LSIG-TXOP-PROT]"); | |
828 | return 0; | |
829 | } | |
830 | ||
831 | return 1; | |
832 | } | |
ad1e68e6 | 833 | |
c781eb84 EP |
834 | |
835 | #ifdef CONFIG_IEEE80211AC | |
836 | ||
837 | static int ieee80211ac_cap_check(u32 hw, u32 conf, u32 cap, const char *name) | |
838 | { | |
839 | u32 req_cap = conf & cap; | |
840 | ||
841 | /* | |
842 | * Make sure we support all requested capabilities. | |
843 | * NOTE: We assume that 'cap' represents a capability mask, | |
844 | * not a discrete value. | |
845 | */ | |
846 | if ((hw & req_cap) != req_cap) { | |
847 | wpa_printf(MSG_ERROR, "Driver does not support configured VHT capability [%s]", | |
848 | name); | |
849 | return 0; | |
850 | } | |
851 | return 1; | |
852 | } | |
853 | ||
854 | ||
855 | static int ieee80211ac_cap_check_max(u32 hw, u32 conf, u32 cap, | |
856 | const char *name) | |
857 | { | |
858 | u32 hw_max = hw & cap; | |
859 | u32 conf_val = conf & cap; | |
860 | ||
861 | if (conf_val > hw_max) { | |
862 | int offset = find_first_bit(cap); | |
863 | wpa_printf(MSG_ERROR, "Configured VHT capability [%s] exceeds max value supported by the driver (%d > %d)", | |
864 | name, conf_val >> offset, hw_max >> offset); | |
865 | return 0; | |
866 | } | |
867 | return 1; | |
868 | } | |
869 | ||
870 | ||
871 | static int ieee80211ac_supported_vht_capab(struct hostapd_iface *iface) | |
872 | { | |
873 | u32 hw = iface->current_mode->vht_capab; | |
874 | u32 conf = iface->conf->vht_capab; | |
875 | ||
876 | wpa_printf(MSG_DEBUG, "hw vht capab: 0x%x, conf vht capab: 0x%x", | |
877 | hw, conf); | |
878 | ||
879 | #define VHT_CAP_CHECK(cap) \ | |
880 | do { \ | |
881 | if (!ieee80211ac_cap_check(hw, conf, cap, #cap)) \ | |
882 | return 0; \ | |
883 | } while (0) | |
884 | ||
885 | #define VHT_CAP_CHECK_MAX(cap) \ | |
886 | do { \ | |
887 | if (!ieee80211ac_cap_check_max(hw, conf, cap, #cap)) \ | |
888 | return 0; \ | |
889 | } while (0) | |
890 | ||
891 | VHT_CAP_CHECK_MAX(VHT_CAP_MAX_MPDU_LENGTH_MASK); | |
892 | VHT_CAP_CHECK(VHT_CAP_SUPP_CHAN_WIDTH_160MHZ); | |
893 | VHT_CAP_CHECK(VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ); | |
894 | VHT_CAP_CHECK(VHT_CAP_RXLDPC); | |
895 | VHT_CAP_CHECK(VHT_CAP_SHORT_GI_80); | |
896 | VHT_CAP_CHECK(VHT_CAP_SHORT_GI_160); | |
897 | VHT_CAP_CHECK(VHT_CAP_TXSTBC); | |
898 | VHT_CAP_CHECK_MAX(VHT_CAP_RXSTBC_MASK); | |
899 | VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMER_CAPABLE); | |
900 | VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMEE_CAPABLE); | |
901 | VHT_CAP_CHECK_MAX(VHT_CAP_BEAMFORMEE_STS_MAX); | |
902 | VHT_CAP_CHECK_MAX(VHT_CAP_SOUNDING_DIMENSION_MAX); | |
903 | VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMER_CAPABLE); | |
904 | VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMEE_CAPABLE); | |
905 | VHT_CAP_CHECK(VHT_CAP_VHT_TXOP_PS); | |
906 | VHT_CAP_CHECK(VHT_CAP_HTC_VHT); | |
905828fe | 907 | VHT_CAP_CHECK_MAX(VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MAX); |
c781eb84 EP |
908 | VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB); |
909 | VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB); | |
910 | VHT_CAP_CHECK(VHT_CAP_RX_ANTENNA_PATTERN); | |
911 | VHT_CAP_CHECK(VHT_CAP_TX_ANTENNA_PATTERN); | |
912 | ||
913 | #undef VHT_CAP_CHECK | |
914 | #undef VHT_CAP_CHECK_MAX | |
915 | ||
916 | return 1; | |
917 | } | |
918 | #endif /* CONFIG_IEEE80211AC */ | |
919 | ||
ad1e68e6 JM |
920 | #endif /* CONFIG_IEEE80211N */ |
921 | ||
922 | ||
923 | int hostapd_check_ht_capab(struct hostapd_iface *iface) | |
924 | { | |
925 | #ifdef CONFIG_IEEE80211N | |
926 | int ret; | |
ec2b8909 SM |
927 | if (!iface->conf->ieee80211n) |
928 | return 0; | |
1b4d3793 NS |
929 | if (!ieee80211n_supported_ht_capab(iface)) |
930 | return -1; | |
c781eb84 EP |
931 | #ifdef CONFIG_IEEE80211AC |
932 | if (!ieee80211ac_supported_vht_capab(iface)) | |
933 | return -1; | |
934 | #endif /* CONFIG_IEEE80211AC */ | |
ad1e68e6 JM |
935 | ret = ieee80211n_check_40mhz(iface); |
936 | if (ret) | |
937 | return ret; | |
938 | if (!ieee80211n_allowed_ht40_channel_pair(iface)) | |
939 | return -1; | |
3e0cb2c5 JM |
940 | #endif /* CONFIG_IEEE80211N */ |
941 | ||
ad1e68e6 JM |
942 | return 0; |
943 | } | |
944 | ||
3e0cb2c5 | 945 | |
245e026e MK |
946 | static int hostapd_is_usable_chan(struct hostapd_iface *iface, |
947 | int channel, int primary) | |
948 | { | |
949 | int i; | |
950 | struct hostapd_channel_data *chan; | |
951 | ||
952 | for (i = 0; i < iface->current_mode->num_channels; i++) { | |
953 | chan = &iface->current_mode->channels[i]; | |
954 | if (chan->chan != channel) | |
955 | continue; | |
956 | ||
957 | if (!(chan->flag & HOSTAPD_CHAN_DISABLED)) | |
958 | return 1; | |
959 | ||
960 | wpa_printf(MSG_DEBUG, | |
961 | "%schannel [%i] (%i) is disabled for use in AP mode, flags: 0x%x%s%s%s", | |
962 | primary ? "" : "Configured HT40 secondary ", | |
963 | i, chan->chan, chan->flag, | |
964 | chan->flag & HOSTAPD_CHAN_NO_IBSS ? " NO-IBSS" : "", | |
965 | chan->flag & HOSTAPD_CHAN_PASSIVE_SCAN ? | |
966 | " PASSIVE-SCAN" : "", | |
967 | chan->flag & HOSTAPD_CHAN_RADAR ? " RADAR" : ""); | |
968 | } | |
969 | ||
970 | return 0; | |
971 | } | |
972 | ||
973 | ||
974 | static int hostapd_is_usable_chans(struct hostapd_iface *iface) | |
975 | { | |
976 | if (!hostapd_is_usable_chan(iface, iface->conf->channel, 1)) | |
977 | return 0; | |
978 | ||
979 | if (!iface->conf->secondary_channel) | |
980 | return 1; | |
981 | ||
982 | return hostapd_is_usable_chan(iface, iface->conf->channel + | |
983 | iface->conf->secondary_channel * 4, 0); | |
984 | } | |
985 | ||
986 | ||
987 | static enum hostapd_chan_status | |
988 | hostapd_check_chans(struct hostapd_iface *iface) | |
989 | { | |
990 | if (iface->conf->channel) { | |
991 | if (hostapd_is_usable_chans(iface)) | |
992 | return HOSTAPD_CHAN_VALID; | |
993 | else | |
994 | return HOSTAPD_CHAN_INVALID; | |
995 | } | |
996 | ||
997 | /* | |
50f4f2a0 MK |
998 | * The user set channel=0 or channel=acs_survey |
999 | * which is used to trigger ACS. | |
245e026e | 1000 | */ |
50f4f2a0 MK |
1001 | |
1002 | switch (acs_init(iface)) { | |
1003 | case HOSTAPD_CHAN_ACS: | |
1004 | return HOSTAPD_CHAN_ACS; | |
1005 | case HOSTAPD_CHAN_VALID: | |
1006 | case HOSTAPD_CHAN_INVALID: | |
1007 | default: | |
1008 | return HOSTAPD_CHAN_INVALID; | |
1009 | } | |
245e026e MK |
1010 | } |
1011 | ||
1012 | ||
1013 | static void hostapd_notify_bad_chans(struct hostapd_iface *iface) | |
1014 | { | |
1015 | hostapd_logger(iface->bss[0], NULL, | |
1016 | HOSTAPD_MODULE_IEEE80211, | |
1017 | HOSTAPD_LEVEL_WARNING, | |
1018 | "Configured channel (%d) not found from the " | |
1019 | "channel list of current mode (%d) %s", | |
1020 | iface->conf->channel, | |
1021 | iface->current_mode->mode, | |
1022 | hostapd_hw_mode_txt(iface->current_mode->mode)); | |
1023 | hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211, | |
1024 | HOSTAPD_LEVEL_WARNING, | |
1025 | "Hardware does not support configured channel"); | |
1026 | } | |
1027 | ||
1028 | ||
3645fd5a | 1029 | int hostapd_acs_completed(struct hostapd_iface *iface, int err) |
50f4f2a0 | 1030 | { |
0e1d0b37 | 1031 | int ret = -1; |
50f4f2a0 | 1032 | |
3645fd5a HS |
1033 | if (err) |
1034 | goto out; | |
1035 | ||
50f4f2a0 MK |
1036 | switch (hostapd_check_chans(iface)) { |
1037 | case HOSTAPD_CHAN_VALID: | |
ae134e1d JM |
1038 | wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, |
1039 | ACS_EVENT_COMPLETED "freq=%d channel=%d", | |
1040 | hostapd_hw_get_freq(iface->bss[0], | |
1041 | iface->conf->channel), | |
1042 | iface->conf->channel); | |
50f4f2a0 MK |
1043 | break; |
1044 | case HOSTAPD_CHAN_ACS: | |
1045 | wpa_printf(MSG_ERROR, "ACS error - reported complete, but no result available"); | |
ae134e1d | 1046 | wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED); |
50f4f2a0 | 1047 | hostapd_notify_bad_chans(iface); |
0e1d0b37 | 1048 | goto out; |
50f4f2a0 MK |
1049 | case HOSTAPD_CHAN_INVALID: |
1050 | default: | |
1051 | wpa_printf(MSG_ERROR, "ACS picked unusable channels"); | |
ae134e1d | 1052 | wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED); |
50f4f2a0 | 1053 | hostapd_notify_bad_chans(iface); |
0e1d0b37 | 1054 | goto out; |
50f4f2a0 MK |
1055 | } |
1056 | ||
1057 | ret = hostapd_check_ht_capab(iface); | |
1058 | if (ret < 0) | |
0e1d0b37 | 1059 | goto out; |
50f4f2a0 MK |
1060 | if (ret == 1) { |
1061 | wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback"); | |
1062 | return 0; | |
1063 | } | |
1064 | ||
0e1d0b37 HS |
1065 | ret = 0; |
1066 | out: | |
1067 | return hostapd_setup_interface_complete(iface, ret); | |
50f4f2a0 MK |
1068 | } |
1069 | ||
1070 | ||
6fc6879b | 1071 | /** |
ddaa83eb | 1072 | * hostapd_select_hw_mode - Select the hardware mode |
6fc6879b | 1073 | * @iface: Pointer to interface data. |
60eda5e4 | 1074 | * Returns: 0 on success, < 0 on failure |
6fc6879b | 1075 | * |
ddaa83eb JM |
1076 | * Sets up the hardware mode, channel, rates, and passive scanning |
1077 | * based on the configuration. | |
6fc6879b | 1078 | */ |
ddaa83eb | 1079 | int hostapd_select_hw_mode(struct hostapd_iface *iface) |
6fc6879b | 1080 | { |
245e026e | 1081 | int i; |
6fc6879b JM |
1082 | |
1083 | if (iface->num_hw_features < 1) | |
1084 | return -1; | |
1085 | ||
c1151e47 JM |
1086 | if ((iface->conf->hw_mode == HOSTAPD_MODE_IEEE80211G || |
1087 | iface->conf->ieee80211n || iface->conf->ieee80211ac) && | |
1088 | iface->conf->channel == 14) { | |
1089 | wpa_printf(MSG_INFO, "Disable OFDM/HT/VHT on channel 14"); | |
1090 | iface->conf->hw_mode = HOSTAPD_MODE_IEEE80211B; | |
1091 | iface->conf->ieee80211n = 0; | |
1092 | iface->conf->ieee80211ac = 0; | |
1093 | } | |
1094 | ||
6fc6879b JM |
1095 | iface->current_mode = NULL; |
1096 | for (i = 0; i < iface->num_hw_features; i++) { | |
1097 | struct hostapd_hw_modes *mode = &iface->hw_features[i]; | |
6caf9ca6 | 1098 | if (mode->mode == iface->conf->hw_mode) { |
6fc6879b JM |
1099 | iface->current_mode = mode; |
1100 | break; | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | if (iface->current_mode == NULL) { | |
1105 | wpa_printf(MSG_ERROR, "Hardware does not support configured " | |
1106 | "mode"); | |
1107 | hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211, | |
1108 | HOSTAPD_LEVEL_WARNING, | |
1109 | "Hardware does not support configured mode " | |
93ac2404 JM |
1110 | "(%d) (hw_mode in hostapd.conf)", |
1111 | (int) iface->conf->hw_mode); | |
60eda5e4 | 1112 | return -2; |
6fc6879b JM |
1113 | } |
1114 | ||
245e026e MK |
1115 | switch (hostapd_check_chans(iface)) { |
1116 | case HOSTAPD_CHAN_VALID: | |
1117 | return 0; | |
50f4f2a0 MK |
1118 | case HOSTAPD_CHAN_ACS: /* ACS will run and later complete */ |
1119 | return 1; | |
245e026e MK |
1120 | case HOSTAPD_CHAN_INVALID: |
1121 | default: | |
1122 | hostapd_notify_bad_chans(iface); | |
60eda5e4 | 1123 | return -3; |
24c9fceb | 1124 | } |
6fc6879b JM |
1125 | } |
1126 | ||
1127 | ||
1128 | const char * hostapd_hw_mode_txt(int mode) | |
1129 | { | |
1130 | switch (mode) { | |
1131 | case HOSTAPD_MODE_IEEE80211A: | |
1132 | return "IEEE 802.11a"; | |
1133 | case HOSTAPD_MODE_IEEE80211B: | |
1134 | return "IEEE 802.11b"; | |
1135 | case HOSTAPD_MODE_IEEE80211G: | |
1136 | return "IEEE 802.11g"; | |
7829894c VK |
1137 | case HOSTAPD_MODE_IEEE80211AD: |
1138 | return "IEEE 802.11ad"; | |
6fc6879b JM |
1139 | default: |
1140 | return "UNKNOWN"; | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | ||
1145 | int hostapd_hw_get_freq(struct hostapd_data *hapd, int chan) | |
1146 | { | |
1147 | int i; | |
1148 | ||
1149 | if (!hapd->iface->current_mode) | |
1150 | return 0; | |
1151 | ||
1152 | for (i = 0; i < hapd->iface->current_mode->num_channels; i++) { | |
1153 | struct hostapd_channel_data *ch = | |
1154 | &hapd->iface->current_mode->channels[i]; | |
1155 | if (ch->chan == chan) | |
1156 | return ch->freq; | |
1157 | } | |
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | ||
1163 | int hostapd_hw_get_channel(struct hostapd_data *hapd, int freq) | |
1164 | { | |
1165 | int i; | |
1166 | ||
1167 | if (!hapd->iface->current_mode) | |
1168 | return 0; | |
1169 | ||
1170 | for (i = 0; i < hapd->iface->current_mode->num_channels; i++) { | |
1171 | struct hostapd_channel_data *ch = | |
1172 | &hapd->iface->current_mode->channels[i]; | |
1173 | if (ch->freq == freq) | |
1174 | return ch->chan; | |
1175 | } | |
1176 | ||
1177 | return 0; | |
1178 | } |