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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 JM |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * Alternatively, this software may be distributed under the terms of BSD | |
12 | * license. | |
13 | * | |
14 | * See README and COPYING for more details. | |
15 | */ | |
16 | ||
1057d78e | 17 | #include "utils/includes.h" |
6fc6879b | 18 | |
1057d78e JM |
19 | #include "utils/common.h" |
20 | #include "utils/eloop.h" | |
90973fb2 JM |
21 | #include "common/ieee802_11_defs.h" |
22 | #include "common/ieee802_11_common.h" | |
ae134e1d | 23 | #include "common/wpa_ctrl.h" |
6e6e8c31 | 24 | #include "drivers/driver.h" |
6226e38d JM |
25 | #include "hostapd.h" |
26 | #include "ap_config.h" | |
6e6e8c31 | 27 | #include "ap_drv_ops.h" |
50f4f2a0 | 28 | #include "acs.h" |
6226e38d | 29 | #include "hw_features.h" |
6fc6879b JM |
30 | |
31 | ||
32 | void hostapd_free_hw_features(struct hostapd_hw_modes *hw_features, | |
33 | size_t num_hw_features) | |
34 | { | |
35 | size_t i; | |
36 | ||
37 | if (hw_features == NULL) | |
38 | return; | |
39 | ||
40 | for (i = 0; i < num_hw_features; i++) { | |
41 | os_free(hw_features[i].channels); | |
42 | os_free(hw_features[i].rates); | |
43 | } | |
44 | ||
45 | os_free(hw_features); | |
46 | } | |
47 | ||
48 | ||
e76da505 JD |
49 | #ifndef CONFIG_NO_STDOUT_DEBUG |
50 | static char * dfs_info(struct hostapd_channel_data *chan) | |
51 | { | |
52 | static char info[256]; | |
53 | char *state; | |
54 | ||
55 | switch (chan->flag & HOSTAPD_CHAN_DFS_MASK) { | |
56 | case HOSTAPD_CHAN_DFS_UNKNOWN: | |
57 | state = "unknown"; | |
58 | break; | |
59 | case HOSTAPD_CHAN_DFS_USABLE: | |
60 | state = "usable"; | |
61 | break; | |
62 | case HOSTAPD_CHAN_DFS_UNAVAILABLE: | |
63 | state = "unavailable"; | |
64 | break; | |
65 | case HOSTAPD_CHAN_DFS_AVAILABLE: | |
66 | state = "available"; | |
67 | break; | |
68 | default: | |
69 | return ""; | |
70 | } | |
71 | os_snprintf(info, sizeof(info), " (DFS state = %s)", state); | |
72 | info[sizeof(info) - 1] = '\0'; | |
73 | ||
74 | return info; | |
75 | } | |
76 | #endif /* CONFIG_NO_STDOUT_DEBUG */ | |
77 | ||
78 | ||
6fc6879b JM |
79 | int hostapd_get_hw_features(struct hostapd_iface *iface) |
80 | { | |
81 | struct hostapd_data *hapd = iface->bss[0]; | |
82 | int ret = 0, i, j; | |
83 | u16 num_modes, flags; | |
84 | struct hostapd_hw_modes *modes; | |
85 | ||
85141289 JM |
86 | if (hostapd_drv_none(hapd)) |
87 | return -1; | |
6fc6879b JM |
88 | modes = hostapd_get_hw_feature_data(hapd, &num_modes, &flags); |
89 | if (modes == NULL) { | |
90 | hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211, | |
91 | HOSTAPD_LEVEL_DEBUG, | |
92 | "Fetching hardware channel/rate support not " | |
93 | "supported."); | |
94 | return -1; | |
95 | } | |
96 | ||
97 | iface->hw_flags = flags; | |
98 | ||
99 | hostapd_free_hw_features(iface->hw_features, iface->num_hw_features); | |
100 | iface->hw_features = modes; | |
101 | iface->num_hw_features = num_modes; | |
102 | ||
103 | for (i = 0; i < num_modes; i++) { | |
104 | struct hostapd_hw_modes *feature = &modes[i]; | |
e76da505 JD |
105 | int dfs_enabled = hapd->iconf->ieee80211h && |
106 | (iface->drv_flags & WPA_DRIVER_FLAGS_RADAR); | |
107 | ||
6fc6879b JM |
108 | /* set flag for channels we can use in current regulatory |
109 | * domain */ | |
110 | for (j = 0; j < feature->num_channels; j++) { | |
e76da505 JD |
111 | int dfs = 0; |
112 | ||
10b83bd7 JM |
113 | /* |
114 | * Disable all channels that are marked not to allow | |
e76da505 JD |
115 | * IBSS operation or active scanning. |
116 | * Use radar channels only if the driver supports DFS. | |
10b83bd7 | 117 | */ |
e76da505 JD |
118 | if ((feature->channels[j].flag & |
119 | HOSTAPD_CHAN_RADAR) && dfs_enabled) { | |
120 | dfs = 1; | |
121 | } else if (feature->channels[j].flag & | |
122 | (HOSTAPD_CHAN_NO_IBSS | | |
123 | HOSTAPD_CHAN_PASSIVE_SCAN | | |
124 | HOSTAPD_CHAN_RADAR)) { | |
6fc6879b | 125 | feature->channels[j].flag |= |
10b83bd7 | 126 | HOSTAPD_CHAN_DISABLED; |
e76da505 JD |
127 | } |
128 | ||
10b83bd7 JM |
129 | if (feature->channels[j].flag & HOSTAPD_CHAN_DISABLED) |
130 | continue; | |
e76da505 | 131 | |
10b83bd7 | 132 | wpa_printf(MSG_MSGDUMP, "Allowed channel: mode=%d " |
e76da505 | 133 | "chan=%d freq=%d MHz max_tx_power=%d dBm%s", |
10b83bd7 JM |
134 | feature->mode, |
135 | feature->channels[j].chan, | |
bf01d8bc | 136 | feature->channels[j].freq, |
e76da505 JD |
137 | feature->channels[j].max_tx_power, |
138 | dfs ? dfs_info(&feature->channels[j]) : ""); | |
6fc6879b JM |
139 | } |
140 | } | |
141 | ||
142 | return ret; | |
143 | } | |
144 | ||
145 | ||
34445d12 | 146 | int hostapd_prepare_rates(struct hostapd_iface *iface, |
5a5009dc | 147 | struct hostapd_hw_modes *mode) |
6fc6879b JM |
148 | { |
149 | int i, num_basic_rates = 0; | |
150 | int basic_rates_a[] = { 60, 120, 240, -1 }; | |
151 | int basic_rates_b[] = { 10, 20, -1 }; | |
152 | int basic_rates_g[] = { 10, 20, 55, 110, -1 }; | |
153 | int *basic_rates; | |
154 | ||
34445d12 JM |
155 | if (iface->conf->basic_rates) |
156 | basic_rates = iface->conf->basic_rates; | |
6fc6879b JM |
157 | else switch (mode->mode) { |
158 | case HOSTAPD_MODE_IEEE80211A: | |
159 | basic_rates = basic_rates_a; | |
160 | break; | |
161 | case HOSTAPD_MODE_IEEE80211B: | |
162 | basic_rates = basic_rates_b; | |
163 | break; | |
164 | case HOSTAPD_MODE_IEEE80211G: | |
165 | basic_rates = basic_rates_g; | |
166 | break; | |
7829894c VK |
167 | case HOSTAPD_MODE_IEEE80211AD: |
168 | return 0; /* No basic rates for 11ad */ | |
6fc6879b JM |
169 | default: |
170 | return -1; | |
171 | } | |
172 | ||
e5693c47 JM |
173 | i = 0; |
174 | while (basic_rates[i] >= 0) | |
175 | i++; | |
f0898e95 JM |
176 | if (i) |
177 | i++; /* -1 termination */ | |
34445d12 | 178 | os_free(iface->basic_rates); |
78018ae9 | 179 | iface->basic_rates = os_malloc(i * sizeof(int)); |
34445d12 | 180 | if (iface->basic_rates) |
78018ae9 | 181 | os_memcpy(iface->basic_rates, basic_rates, i * sizeof(int)); |
6fc6879b | 182 | |
34445d12 JM |
183 | os_free(iface->current_rates); |
184 | iface->num_rates = 0; | |
6fc6879b | 185 | |
34445d12 | 186 | iface->current_rates = |
f9884c09 | 187 | os_calloc(mode->num_rates, sizeof(struct hostapd_rate_data)); |
34445d12 | 188 | if (!iface->current_rates) { |
6fc6879b JM |
189 | wpa_printf(MSG_ERROR, "Failed to allocate memory for rate " |
190 | "table."); | |
191 | return -1; | |
192 | } | |
193 | ||
194 | for (i = 0; i < mode->num_rates; i++) { | |
195 | struct hostapd_rate_data *rate; | |
196 | ||
34445d12 JM |
197 | if (iface->conf->supported_rates && |
198 | !hostapd_rate_found(iface->conf->supported_rates, | |
fb7842aa | 199 | mode->rates[i])) |
6fc6879b JM |
200 | continue; |
201 | ||
34445d12 | 202 | rate = &iface->current_rates[iface->num_rates]; |
fb7842aa | 203 | rate->rate = mode->rates[i]; |
6fc6879b JM |
204 | if (hostapd_rate_found(basic_rates, rate->rate)) { |
205 | rate->flags |= HOSTAPD_RATE_BASIC; | |
206 | num_basic_rates++; | |
fb7842aa | 207 | } |
6fc6879b | 208 | wpa_printf(MSG_DEBUG, "RATE[%d] rate=%d flags=0x%x", |
34445d12 JM |
209 | iface->num_rates, rate->rate, rate->flags); |
210 | iface->num_rates++; | |
6fc6879b JM |
211 | } |
212 | ||
34445d12 JM |
213 | if ((iface->num_rates == 0 || num_basic_rates == 0) && |
214 | (!iface->conf->ieee80211n || !iface->conf->require_ht)) { | |
6fc6879b JM |
215 | wpa_printf(MSG_ERROR, "No rates remaining in supported/basic " |
216 | "rate sets (%d,%d).", | |
34445d12 | 217 | iface->num_rates, num_basic_rates); |
6fc6879b JM |
218 | return -1; |
219 | } | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | ||
3e0cb2c5 JM |
225 | #ifdef CONFIG_IEEE80211N |
226 | static int ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface *iface) | |
227 | { | |
228 | int sec_chan, ok, j, first; | |
229 | int allowed[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157, | |
230 | 184, 192 }; | |
231 | size_t k; | |
232 | ||
233 | if (!iface->conf->secondary_channel) | |
234 | return 1; /* HT40 not used */ | |
235 | ||
236 | sec_chan = iface->conf->channel + iface->conf->secondary_channel * 4; | |
237 | wpa_printf(MSG_DEBUG, "HT40: control channel: %d " | |
238 | "secondary channel: %d", | |
239 | iface->conf->channel, sec_chan); | |
240 | ||
241 | /* Verify that HT40 secondary channel is an allowed 20 MHz | |
242 | * channel */ | |
243 | ok = 0; | |
244 | for (j = 0; j < iface->current_mode->num_channels; j++) { | |
245 | struct hostapd_channel_data *chan = | |
246 | &iface->current_mode->channels[j]; | |
247 | if (!(chan->flag & HOSTAPD_CHAN_DISABLED) && | |
248 | chan->chan == sec_chan) { | |
249 | ok = 1; | |
250 | break; | |
251 | } | |
252 | } | |
253 | if (!ok) { | |
254 | wpa_printf(MSG_ERROR, "HT40 secondary channel %d not allowed", | |
255 | sec_chan); | |
256 | return 0; | |
257 | } | |
258 | ||
259 | /* | |
260 | * Verify that HT40 primary,secondary channel pair is allowed per | |
261 | * IEEE 802.11n Annex J. This is only needed for 5 GHz band since | |
262 | * 2.4 GHz rules allow all cases where the secondary channel fits into | |
263 | * the list of allowed channels (already checked above). | |
264 | */ | |
265 | if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A) | |
266 | return 1; | |
267 | ||
268 | if (iface->conf->secondary_channel > 0) | |
269 | first = iface->conf->channel; | |
270 | else | |
271 | first = sec_chan; | |
272 | ||
273 | ok = 0; | |
e7ecab4a | 274 | for (k = 0; k < ARRAY_SIZE(allowed); k++) { |
3e0cb2c5 JM |
275 | if (first == allowed[k]) { |
276 | ok = 1; | |
277 | break; | |
278 | } | |
279 | } | |
280 | if (!ok) { | |
281 | wpa_printf(MSG_ERROR, "HT40 channel pair (%d, %d) not allowed", | |
282 | iface->conf->channel, | |
283 | iface->conf->secondary_channel); | |
284 | return 0; | |
285 | } | |
286 | ||
287 | return 1; | |
288 | } | |
30fd5f14 JM |
289 | |
290 | ||
5eb4e3d0 JM |
291 | static void ieee80211n_switch_pri_sec(struct hostapd_iface *iface) |
292 | { | |
293 | if (iface->conf->secondary_channel > 0) { | |
294 | iface->conf->channel += 4; | |
295 | iface->conf->secondary_channel = -1; | |
296 | } else { | |
297 | iface->conf->channel -= 4; | |
298 | iface->conf->secondary_channel = 1; | |
299 | } | |
300 | } | |
301 | ||
302 | ||
ad1e68e6 JM |
303 | static void ieee80211n_get_pri_sec_chan(struct wpa_scan_res *bss, |
304 | int *pri_chan, int *sec_chan) | |
305 | { | |
306 | struct ieee80211_ht_operation *oper; | |
307 | struct ieee802_11_elems elems; | |
308 | ||
309 | *pri_chan = *sec_chan = 0; | |
310 | ||
311 | ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0); | |
312 | if (elems.ht_operation && | |
313 | elems.ht_operation_len >= sizeof(*oper)) { | |
314 | oper = (struct ieee80211_ht_operation *) elems.ht_operation; | |
315 | *pri_chan = oper->control_chan; | |
316 | if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) { | |
41619262 JM |
317 | int sec = oper->ht_param & |
318 | HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK; | |
319 | if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) | |
ad1e68e6 | 320 | *sec_chan = *pri_chan + 4; |
41619262 | 321 | else if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) |
ad1e68e6 JM |
322 | *sec_chan = *pri_chan - 4; |
323 | } | |
324 | } | |
325 | } | |
326 | ||
327 | ||
328 | static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface, | |
329 | struct wpa_scan_results *scan_res) | |
5eb4e3d0 JM |
330 | { |
331 | int pri_chan, sec_chan, pri_freq, sec_freq, pri_bss, sec_bss; | |
ad1e68e6 JM |
332 | int bss_pri_chan, bss_sec_chan; |
333 | size_t i; | |
5eb4e3d0 JM |
334 | int match; |
335 | ||
336 | pri_chan = iface->conf->channel; | |
337 | sec_chan = iface->conf->secondary_channel * 4; | |
338 | pri_freq = hostapd_hw_get_freq(iface->bss[0], pri_chan); | |
339 | if (iface->conf->secondary_channel > 0) | |
340 | sec_freq = pri_freq + 20; | |
341 | else | |
342 | sec_freq = pri_freq - 20; | |
343 | ||
5eb4e3d0 JM |
344 | /* |
345 | * Switch PRI/SEC channels if Beacons were detected on selected SEC | |
346 | * channel, but not on selected PRI channel. | |
347 | */ | |
348 | pri_bss = sec_bss = 0; | |
ad1e68e6 JM |
349 | for (i = 0; i < scan_res->num; i++) { |
350 | struct wpa_scan_res *bss = scan_res->res[i]; | |
351 | if (bss->freq == pri_freq) | |
5eb4e3d0 | 352 | pri_bss++; |
ad1e68e6 | 353 | else if (bss->freq == sec_freq) |
5eb4e3d0 JM |
354 | sec_bss++; |
355 | } | |
356 | if (sec_bss && !pri_bss) { | |
357 | wpa_printf(MSG_INFO, "Switch own primary and secondary " | |
358 | "channel to get secondary channel with no Beacons " | |
359 | "from other BSSes"); | |
360 | ieee80211n_switch_pri_sec(iface); | |
361 | } | |
362 | ||
363 | /* | |
364 | * Match PRI/SEC channel with any existing HT40 BSS on the same | |
365 | * channels that we are about to use (if already mixed order in | |
366 | * existing BSSes, use own preference). | |
367 | */ | |
368 | match = 0; | |
ad1e68e6 JM |
369 | for (i = 0; i < scan_res->num; i++) { |
370 | struct wpa_scan_res *bss = scan_res->res[i]; | |
371 | ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan); | |
372 | if (pri_chan == bss_pri_chan && | |
373 | sec_chan == bss_sec_chan) { | |
5eb4e3d0 JM |
374 | match = 1; |
375 | break; | |
376 | } | |
377 | } | |
378 | if (!match) { | |
ad1e68e6 JM |
379 | for (i = 0; i < scan_res->num; i++) { |
380 | struct wpa_scan_res *bss = scan_res->res[i]; | |
c6313c75 FF |
381 | ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan, |
382 | &bss_sec_chan); | |
ad1e68e6 JM |
383 | if (pri_chan == bss_sec_chan && |
384 | sec_chan == bss_pri_chan) { | |
5eb4e3d0 JM |
385 | wpa_printf(MSG_INFO, "Switch own primary and " |
386 | "secondary channel due to BSS " | |
387 | "overlap with " MACSTR, | |
ad1e68e6 | 388 | MAC2STR(bss->bssid)); |
5eb4e3d0 JM |
389 | ieee80211n_switch_pri_sec(iface); |
390 | break; | |
391 | } | |
392 | } | |
393 | } | |
394 | ||
395 | return 1; | |
396 | } | |
397 | ||
398 | ||
ad1e68e6 JM |
399 | static int ieee80211n_check_40mhz_2g4(struct hostapd_iface *iface, |
400 | struct wpa_scan_results *scan_res) | |
5eb4e3d0 JM |
401 | { |
402 | int pri_freq, sec_freq; | |
403 | int affected_start, affected_end; | |
ad1e68e6 | 404 | size_t i; |
5eb4e3d0 JM |
405 | |
406 | pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel); | |
407 | if (iface->conf->secondary_channel > 0) | |
408 | sec_freq = pri_freq + 20; | |
409 | else | |
410 | sec_freq = pri_freq - 20; | |
411 | affected_start = (pri_freq + sec_freq) / 2 - 25; | |
412 | affected_end = (pri_freq + sec_freq) / 2 + 25; | |
413 | wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz", | |
414 | affected_start, affected_end); | |
ad1e68e6 JM |
415 | for (i = 0; i < scan_res->num; i++) { |
416 | struct wpa_scan_res *bss = scan_res->res[i]; | |
417 | int pri = bss->freq; | |
5eb4e3d0 | 418 | int sec = pri; |
ad1e68e6 JM |
419 | int sec_chan, pri_chan; |
420 | ||
421 | ieee80211n_get_pri_sec_chan(bss, &pri_chan, &sec_chan); | |
422 | ||
423 | if (sec_chan) { | |
424 | if (sec_chan < pri_chan) | |
5eb4e3d0 JM |
425 | sec = pri - 20; |
426 | else | |
427 | sec = pri + 20; | |
428 | } | |
429 | ||
430 | if ((pri < affected_start || pri > affected_end) && | |
431 | (sec < affected_start || sec > affected_end)) | |
432 | continue; /* not within affected channel range */ | |
433 | ||
ad1e68e6 JM |
434 | wpa_printf(MSG_DEBUG, "Neighboring BSS: " MACSTR |
435 | " freq=%d pri=%d sec=%d", | |
436 | MAC2STR(bss->bssid), bss->freq, pri_chan, sec_chan); | |
437 | ||
438 | if (sec_chan) { | |
5eb4e3d0 JM |
439 | if (pri_freq != pri || sec_freq != sec) { |
440 | wpa_printf(MSG_DEBUG, "40 MHz pri/sec " | |
441 | "mismatch with BSS " MACSTR | |
442 | " <%d,%d> (chan=%d%c) vs. <%d,%d>", | |
ad1e68e6 JM |
443 | MAC2STR(bss->bssid), |
444 | pri, sec, pri_chan, | |
5eb4e3d0 JM |
445 | sec > pri ? '+' : '-', |
446 | pri_freq, sec_freq); | |
447 | return 0; | |
448 | } | |
449 | } | |
450 | ||
451 | /* TODO: 40 MHz intolerant */ | |
452 | } | |
453 | ||
454 | return 1; | |
455 | } | |
456 | ||
457 | ||
ad1e68e6 | 458 | static void ieee80211n_check_scan(struct hostapd_iface *iface) |
5eb4e3d0 | 459 | { |
ad1e68e6 | 460 | struct wpa_scan_results *scan_res; |
5eb4e3d0 | 461 | int oper40; |
7615078c | 462 | int res; |
5eb4e3d0 | 463 | |
5eb4e3d0 | 464 | /* Check list of neighboring BSSes (from scan) to see whether 40 MHz is |
7fa56233 | 465 | * allowed per IEEE Std 802.11-2012, 10.15.3.2 */ |
5eb4e3d0 | 466 | |
ad1e68e6 JM |
467 | iface->scan_cb = NULL; |
468 | ||
469 | scan_res = hostapd_driver_get_scan_results(iface->bss[0]); | |
470 | if (scan_res == NULL) { | |
471 | hostapd_setup_interface_complete(iface, 1); | |
472 | return; | |
473 | } | |
474 | ||
5eb4e3d0 | 475 | if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A) |
ad1e68e6 | 476 | oper40 = ieee80211n_check_40mhz_5g(iface, scan_res); |
5eb4e3d0 | 477 | else |
ad1e68e6 JM |
478 | oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res); |
479 | wpa_scan_results_free(scan_res); | |
5eb4e3d0 JM |
480 | |
481 | if (!oper40) { | |
482 | wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on " | |
483 | "channel pri=%d sec=%d based on overlapping BSSes", | |
484 | iface->conf->channel, | |
485 | iface->conf->channel + | |
486 | iface->conf->secondary_channel * 4); | |
487 | iface->conf->secondary_channel = 0; | |
5eb4e3d0 | 488 | } |
ad1e68e6 | 489 | |
7615078c JM |
490 | res = ieee80211n_allowed_ht40_channel_pair(iface); |
491 | hostapd_setup_interface_complete(iface, !res); | |
ad1e68e6 JM |
492 | } |
493 | ||
494 | ||
7fa56233 JM |
495 | static void ieee80211n_scan_channels_2g4(struct hostapd_iface *iface, |
496 | struct wpa_driver_scan_params *params) | |
497 | { | |
498 | /* Scan only the affected frequency range */ | |
499 | int pri_freq, sec_freq; | |
500 | int affected_start, affected_end; | |
501 | int i, pos; | |
502 | struct hostapd_hw_modes *mode; | |
503 | ||
504 | if (iface->current_mode == NULL) | |
505 | return; | |
506 | ||
507 | pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel); | |
508 | if (iface->conf->secondary_channel > 0) | |
509 | sec_freq = pri_freq + 20; | |
510 | else | |
511 | sec_freq = pri_freq - 20; | |
512 | affected_start = (pri_freq + sec_freq) / 2 - 25; | |
513 | affected_end = (pri_freq + sec_freq) / 2 + 25; | |
514 | wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz", | |
515 | affected_start, affected_end); | |
516 | ||
517 | mode = iface->current_mode; | |
f9884c09 | 518 | params->freqs = os_calloc(mode->num_channels + 1, sizeof(int)); |
7fa56233 JM |
519 | if (params->freqs == NULL) |
520 | return; | |
521 | pos = 0; | |
522 | ||
523 | for (i = 0; i < mode->num_channels; i++) { | |
524 | struct hostapd_channel_data *chan = &mode->channels[i]; | |
525 | if (chan->flag & HOSTAPD_CHAN_DISABLED) | |
526 | continue; | |
527 | if (chan->freq < affected_start || | |
528 | chan->freq > affected_end) | |
529 | continue; | |
530 | params->freqs[pos++] = chan->freq; | |
531 | } | |
532 | } | |
533 | ||
534 | ||
ad1e68e6 JM |
535 | static int ieee80211n_check_40mhz(struct hostapd_iface *iface) |
536 | { | |
537 | struct wpa_driver_scan_params params; | |
538 | ||
539 | if (!iface->conf->secondary_channel) | |
540 | return 0; /* HT40 not used */ | |
541 | ||
e1c5faf0 | 542 | hostapd_set_state(iface, HAPD_IFACE_HT_SCAN); |
ad1e68e6 JM |
543 | wpa_printf(MSG_DEBUG, "Scan for neighboring BSSes prior to enabling " |
544 | "40 MHz channel"); | |
545 | os_memset(¶ms, 0, sizeof(params)); | |
7fa56233 JM |
546 | if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) |
547 | ieee80211n_scan_channels_2g4(iface, ¶ms); | |
ad1e68e6 JM |
548 | if (hostapd_driver_scan(iface->bss[0], ¶ms) < 0) { |
549 | wpa_printf(MSG_ERROR, "Failed to request a scan of " | |
550 | "neighboring BSSes"); | |
7fa56233 | 551 | os_free(params.freqs); |
ad1e68e6 JM |
552 | return -1; |
553 | } | |
7fa56233 | 554 | os_free(params.freqs); |
ad1e68e6 JM |
555 | |
556 | iface->scan_cb = ieee80211n_check_scan; | |
557 | return 1; | |
5eb4e3d0 JM |
558 | } |
559 | ||
560 | ||
30fd5f14 JM |
561 | static int ieee80211n_supported_ht_capab(struct hostapd_iface *iface) |
562 | { | |
563 | u16 hw = iface->current_mode->ht_capab; | |
564 | u16 conf = iface->conf->ht_capab; | |
565 | ||
30fd5f14 JM |
566 | if ((conf & HT_CAP_INFO_LDPC_CODING_CAP) && |
567 | !(hw & HT_CAP_INFO_LDPC_CODING_CAP)) { | |
568 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
569 | "HT capability [LDPC]"); | |
570 | return 0; | |
571 | } | |
572 | ||
573 | if ((conf & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) && | |
574 | !(hw & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) { | |
575 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
576 | "HT capability [HT40*]"); | |
577 | return 0; | |
578 | } | |
579 | ||
580 | if ((conf & HT_CAP_INFO_SMPS_MASK) != (hw & HT_CAP_INFO_SMPS_MASK) && | |
581 | (conf & HT_CAP_INFO_SMPS_MASK) != HT_CAP_INFO_SMPS_DISABLED) { | |
582 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
583 | "HT capability [SMPS-*]"); | |
584 | return 0; | |
585 | } | |
586 | ||
587 | if ((conf & HT_CAP_INFO_GREEN_FIELD) && | |
588 | !(hw & HT_CAP_INFO_GREEN_FIELD)) { | |
589 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
590 | "HT capability [GF]"); | |
591 | return 0; | |
592 | } | |
593 | ||
594 | if ((conf & HT_CAP_INFO_SHORT_GI20MHZ) && | |
595 | !(hw & HT_CAP_INFO_SHORT_GI20MHZ)) { | |
596 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
597 | "HT capability [SHORT-GI-20]"); | |
598 | return 0; | |
599 | } | |
600 | ||
601 | if ((conf & HT_CAP_INFO_SHORT_GI40MHZ) && | |
602 | !(hw & HT_CAP_INFO_SHORT_GI40MHZ)) { | |
603 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
604 | "HT capability [SHORT-GI-40]"); | |
605 | return 0; | |
606 | } | |
607 | ||
608 | if ((conf & HT_CAP_INFO_TX_STBC) && !(hw & HT_CAP_INFO_TX_STBC)) { | |
609 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
610 | "HT capability [TX-STBC]"); | |
611 | return 0; | |
612 | } | |
613 | ||
614 | if ((conf & HT_CAP_INFO_RX_STBC_MASK) > | |
615 | (hw & HT_CAP_INFO_RX_STBC_MASK)) { | |
616 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
617 | "HT capability [RX-STBC*]"); | |
618 | return 0; | |
619 | } | |
620 | ||
621 | if ((conf & HT_CAP_INFO_DELAYED_BA) && | |
622 | !(hw & HT_CAP_INFO_DELAYED_BA)) { | |
623 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
624 | "HT capability [DELAYED-BA]"); | |
625 | return 0; | |
626 | } | |
627 | ||
628 | if ((conf & HT_CAP_INFO_MAX_AMSDU_SIZE) && | |
629 | !(hw & HT_CAP_INFO_MAX_AMSDU_SIZE)) { | |
630 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
631 | "HT capability [MAX-AMSDU-7935]"); | |
632 | return 0; | |
633 | } | |
634 | ||
635 | if ((conf & HT_CAP_INFO_DSSS_CCK40MHZ) && | |
636 | !(hw & HT_CAP_INFO_DSSS_CCK40MHZ)) { | |
637 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
638 | "HT capability [DSSS_CCK-40]"); | |
639 | return 0; | |
640 | } | |
641 | ||
642 | if ((conf & HT_CAP_INFO_PSMP_SUPP) && !(hw & HT_CAP_INFO_PSMP_SUPP)) { | |
643 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
644 | "HT capability [PSMP]"); | |
645 | return 0; | |
646 | } | |
647 | ||
648 | if ((conf & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT) && | |
649 | !(hw & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT)) { | |
650 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
651 | "HT capability [LSIG-TXOP-PROT]"); | |
652 | return 0; | |
653 | } | |
654 | ||
655 | return 1; | |
656 | } | |
ad1e68e6 | 657 | |
c781eb84 EP |
658 | |
659 | #ifdef CONFIG_IEEE80211AC | |
660 | ||
661 | static int ieee80211ac_cap_check(u32 hw, u32 conf, u32 cap, const char *name) | |
662 | { | |
663 | u32 req_cap = conf & cap; | |
664 | ||
665 | /* | |
666 | * Make sure we support all requested capabilities. | |
667 | * NOTE: We assume that 'cap' represents a capability mask, | |
668 | * not a discrete value. | |
669 | */ | |
670 | if ((hw & req_cap) != req_cap) { | |
671 | wpa_printf(MSG_ERROR, "Driver does not support configured VHT capability [%s]", | |
672 | name); | |
673 | return 0; | |
674 | } | |
675 | return 1; | |
676 | } | |
677 | ||
678 | ||
679 | static int ieee80211ac_cap_check_max(u32 hw, u32 conf, u32 cap, | |
680 | const char *name) | |
681 | { | |
682 | u32 hw_max = hw & cap; | |
683 | u32 conf_val = conf & cap; | |
684 | ||
685 | if (conf_val > hw_max) { | |
686 | int offset = find_first_bit(cap); | |
687 | wpa_printf(MSG_ERROR, "Configured VHT capability [%s] exceeds max value supported by the driver (%d > %d)", | |
688 | name, conf_val >> offset, hw_max >> offset); | |
689 | return 0; | |
690 | } | |
691 | return 1; | |
692 | } | |
693 | ||
694 | ||
695 | static int ieee80211ac_supported_vht_capab(struct hostapd_iface *iface) | |
696 | { | |
697 | u32 hw = iface->current_mode->vht_capab; | |
698 | u32 conf = iface->conf->vht_capab; | |
699 | ||
700 | wpa_printf(MSG_DEBUG, "hw vht capab: 0x%x, conf vht capab: 0x%x", | |
701 | hw, conf); | |
702 | ||
703 | #define VHT_CAP_CHECK(cap) \ | |
704 | do { \ | |
705 | if (!ieee80211ac_cap_check(hw, conf, cap, #cap)) \ | |
706 | return 0; \ | |
707 | } while (0) | |
708 | ||
709 | #define VHT_CAP_CHECK_MAX(cap) \ | |
710 | do { \ | |
711 | if (!ieee80211ac_cap_check_max(hw, conf, cap, #cap)) \ | |
712 | return 0; \ | |
713 | } while (0) | |
714 | ||
715 | VHT_CAP_CHECK_MAX(VHT_CAP_MAX_MPDU_LENGTH_MASK); | |
716 | VHT_CAP_CHECK(VHT_CAP_SUPP_CHAN_WIDTH_160MHZ); | |
717 | VHT_CAP_CHECK(VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ); | |
718 | VHT_CAP_CHECK(VHT_CAP_RXLDPC); | |
719 | VHT_CAP_CHECK(VHT_CAP_SHORT_GI_80); | |
720 | VHT_CAP_CHECK(VHT_CAP_SHORT_GI_160); | |
721 | VHT_CAP_CHECK(VHT_CAP_TXSTBC); | |
722 | VHT_CAP_CHECK_MAX(VHT_CAP_RXSTBC_MASK); | |
723 | VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMER_CAPABLE); | |
724 | VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMEE_CAPABLE); | |
725 | VHT_CAP_CHECK_MAX(VHT_CAP_BEAMFORMEE_STS_MAX); | |
726 | VHT_CAP_CHECK_MAX(VHT_CAP_SOUNDING_DIMENSION_MAX); | |
727 | VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMER_CAPABLE); | |
728 | VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMEE_CAPABLE); | |
729 | VHT_CAP_CHECK(VHT_CAP_VHT_TXOP_PS); | |
730 | VHT_CAP_CHECK(VHT_CAP_HTC_VHT); | |
731 | VHT_CAP_CHECK_MAX(VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT); | |
732 | VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB); | |
733 | VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB); | |
734 | VHT_CAP_CHECK(VHT_CAP_RX_ANTENNA_PATTERN); | |
735 | VHT_CAP_CHECK(VHT_CAP_TX_ANTENNA_PATTERN); | |
736 | ||
737 | #undef VHT_CAP_CHECK | |
738 | #undef VHT_CAP_CHECK_MAX | |
739 | ||
740 | return 1; | |
741 | } | |
742 | #endif /* CONFIG_IEEE80211AC */ | |
743 | ||
ad1e68e6 JM |
744 | #endif /* CONFIG_IEEE80211N */ |
745 | ||
746 | ||
747 | int hostapd_check_ht_capab(struct hostapd_iface *iface) | |
748 | { | |
749 | #ifdef CONFIG_IEEE80211N | |
750 | int ret; | |
ec2b8909 SM |
751 | if (!iface->conf->ieee80211n) |
752 | return 0; | |
1b4d3793 NS |
753 | if (!ieee80211n_supported_ht_capab(iface)) |
754 | return -1; | |
c781eb84 EP |
755 | #ifdef CONFIG_IEEE80211AC |
756 | if (!ieee80211ac_supported_vht_capab(iface)) | |
757 | return -1; | |
758 | #endif /* CONFIG_IEEE80211AC */ | |
ad1e68e6 JM |
759 | ret = ieee80211n_check_40mhz(iface); |
760 | if (ret) | |
761 | return ret; | |
762 | if (!ieee80211n_allowed_ht40_channel_pair(iface)) | |
763 | return -1; | |
3e0cb2c5 JM |
764 | #endif /* CONFIG_IEEE80211N */ |
765 | ||
ad1e68e6 JM |
766 | return 0; |
767 | } | |
768 | ||
3e0cb2c5 | 769 | |
245e026e MK |
770 | static int hostapd_is_usable_chan(struct hostapd_iface *iface, |
771 | int channel, int primary) | |
772 | { | |
773 | int i; | |
774 | struct hostapd_channel_data *chan; | |
775 | ||
776 | for (i = 0; i < iface->current_mode->num_channels; i++) { | |
777 | chan = &iface->current_mode->channels[i]; | |
778 | if (chan->chan != channel) | |
779 | continue; | |
780 | ||
781 | if (!(chan->flag & HOSTAPD_CHAN_DISABLED)) | |
782 | return 1; | |
783 | ||
784 | wpa_printf(MSG_DEBUG, | |
785 | "%schannel [%i] (%i) is disabled for use in AP mode, flags: 0x%x%s%s%s", | |
786 | primary ? "" : "Configured HT40 secondary ", | |
787 | i, chan->chan, chan->flag, | |
788 | chan->flag & HOSTAPD_CHAN_NO_IBSS ? " NO-IBSS" : "", | |
789 | chan->flag & HOSTAPD_CHAN_PASSIVE_SCAN ? | |
790 | " PASSIVE-SCAN" : "", | |
791 | chan->flag & HOSTAPD_CHAN_RADAR ? " RADAR" : ""); | |
792 | } | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
797 | ||
798 | static int hostapd_is_usable_chans(struct hostapd_iface *iface) | |
799 | { | |
800 | if (!hostapd_is_usable_chan(iface, iface->conf->channel, 1)) | |
801 | return 0; | |
802 | ||
803 | if (!iface->conf->secondary_channel) | |
804 | return 1; | |
805 | ||
806 | return hostapd_is_usable_chan(iface, iface->conf->channel + | |
807 | iface->conf->secondary_channel * 4, 0); | |
808 | } | |
809 | ||
810 | ||
811 | static enum hostapd_chan_status | |
812 | hostapd_check_chans(struct hostapd_iface *iface) | |
813 | { | |
814 | if (iface->conf->channel) { | |
815 | if (hostapd_is_usable_chans(iface)) | |
816 | return HOSTAPD_CHAN_VALID; | |
817 | else | |
818 | return HOSTAPD_CHAN_INVALID; | |
819 | } | |
820 | ||
821 | /* | |
50f4f2a0 MK |
822 | * The user set channel=0 or channel=acs_survey |
823 | * which is used to trigger ACS. | |
245e026e | 824 | */ |
50f4f2a0 MK |
825 | |
826 | switch (acs_init(iface)) { | |
827 | case HOSTAPD_CHAN_ACS: | |
828 | return HOSTAPD_CHAN_ACS; | |
829 | case HOSTAPD_CHAN_VALID: | |
830 | case HOSTAPD_CHAN_INVALID: | |
831 | default: | |
832 | return HOSTAPD_CHAN_INVALID; | |
833 | } | |
245e026e MK |
834 | } |
835 | ||
836 | ||
837 | static void hostapd_notify_bad_chans(struct hostapd_iface *iface) | |
838 | { | |
839 | hostapd_logger(iface->bss[0], NULL, | |
840 | HOSTAPD_MODULE_IEEE80211, | |
841 | HOSTAPD_LEVEL_WARNING, | |
842 | "Configured channel (%d) not found from the " | |
843 | "channel list of current mode (%d) %s", | |
844 | iface->conf->channel, | |
845 | iface->current_mode->mode, | |
846 | hostapd_hw_mode_txt(iface->current_mode->mode)); | |
847 | hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211, | |
848 | HOSTAPD_LEVEL_WARNING, | |
849 | "Hardware does not support configured channel"); | |
850 | } | |
851 | ||
852 | ||
3645fd5a | 853 | int hostapd_acs_completed(struct hostapd_iface *iface, int err) |
50f4f2a0 | 854 | { |
0e1d0b37 | 855 | int ret = -1; |
50f4f2a0 | 856 | |
3645fd5a HS |
857 | if (err) |
858 | goto out; | |
859 | ||
50f4f2a0 MK |
860 | switch (hostapd_check_chans(iface)) { |
861 | case HOSTAPD_CHAN_VALID: | |
ae134e1d JM |
862 | wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, |
863 | ACS_EVENT_COMPLETED "freq=%d channel=%d", | |
864 | hostapd_hw_get_freq(iface->bss[0], | |
865 | iface->conf->channel), | |
866 | iface->conf->channel); | |
50f4f2a0 MK |
867 | break; |
868 | case HOSTAPD_CHAN_ACS: | |
869 | wpa_printf(MSG_ERROR, "ACS error - reported complete, but no result available"); | |
ae134e1d | 870 | wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED); |
50f4f2a0 | 871 | hostapd_notify_bad_chans(iface); |
0e1d0b37 | 872 | goto out; |
50f4f2a0 MK |
873 | case HOSTAPD_CHAN_INVALID: |
874 | default: | |
875 | wpa_printf(MSG_ERROR, "ACS picked unusable channels"); | |
ae134e1d | 876 | wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED); |
50f4f2a0 | 877 | hostapd_notify_bad_chans(iface); |
0e1d0b37 | 878 | goto out; |
50f4f2a0 MK |
879 | } |
880 | ||
881 | ret = hostapd_check_ht_capab(iface); | |
882 | if (ret < 0) | |
0e1d0b37 | 883 | goto out; |
50f4f2a0 MK |
884 | if (ret == 1) { |
885 | wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback"); | |
886 | return 0; | |
887 | } | |
888 | ||
0e1d0b37 HS |
889 | ret = 0; |
890 | out: | |
891 | return hostapd_setup_interface_complete(iface, ret); | |
50f4f2a0 MK |
892 | } |
893 | ||
894 | ||
6fc6879b | 895 | /** |
ddaa83eb | 896 | * hostapd_select_hw_mode - Select the hardware mode |
6fc6879b | 897 | * @iface: Pointer to interface data. |
60eda5e4 | 898 | * Returns: 0 on success, < 0 on failure |
6fc6879b | 899 | * |
ddaa83eb JM |
900 | * Sets up the hardware mode, channel, rates, and passive scanning |
901 | * based on the configuration. | |
6fc6879b | 902 | */ |
ddaa83eb | 903 | int hostapd_select_hw_mode(struct hostapd_iface *iface) |
6fc6879b | 904 | { |
245e026e | 905 | int i; |
6fc6879b JM |
906 | |
907 | if (iface->num_hw_features < 1) | |
908 | return -1; | |
909 | ||
910 | iface->current_mode = NULL; | |
911 | for (i = 0; i < iface->num_hw_features; i++) { | |
912 | struct hostapd_hw_modes *mode = &iface->hw_features[i]; | |
6caf9ca6 | 913 | if (mode->mode == iface->conf->hw_mode) { |
6fc6879b JM |
914 | iface->current_mode = mode; |
915 | break; | |
916 | } | |
917 | } | |
918 | ||
919 | if (iface->current_mode == NULL) { | |
920 | wpa_printf(MSG_ERROR, "Hardware does not support configured " | |
921 | "mode"); | |
922 | hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211, | |
923 | HOSTAPD_LEVEL_WARNING, | |
924 | "Hardware does not support configured mode " | |
93ac2404 JM |
925 | "(%d) (hw_mode in hostapd.conf)", |
926 | (int) iface->conf->hw_mode); | |
60eda5e4 | 927 | return -2; |
6fc6879b JM |
928 | } |
929 | ||
245e026e MK |
930 | switch (hostapd_check_chans(iface)) { |
931 | case HOSTAPD_CHAN_VALID: | |
932 | return 0; | |
50f4f2a0 MK |
933 | case HOSTAPD_CHAN_ACS: /* ACS will run and later complete */ |
934 | return 1; | |
245e026e MK |
935 | case HOSTAPD_CHAN_INVALID: |
936 | default: | |
937 | hostapd_notify_bad_chans(iface); | |
60eda5e4 | 938 | return -3; |
24c9fceb | 939 | } |
6fc6879b | 940 | |
61693eaa | 941 | return 0; |
6fc6879b JM |
942 | } |
943 | ||
944 | ||
945 | const char * hostapd_hw_mode_txt(int mode) | |
946 | { | |
947 | switch (mode) { | |
948 | case HOSTAPD_MODE_IEEE80211A: | |
949 | return "IEEE 802.11a"; | |
950 | case HOSTAPD_MODE_IEEE80211B: | |
951 | return "IEEE 802.11b"; | |
952 | case HOSTAPD_MODE_IEEE80211G: | |
953 | return "IEEE 802.11g"; | |
7829894c VK |
954 | case HOSTAPD_MODE_IEEE80211AD: |
955 | return "IEEE 802.11ad"; | |
6fc6879b JM |
956 | default: |
957 | return "UNKNOWN"; | |
958 | } | |
959 | } | |
960 | ||
961 | ||
962 | int hostapd_hw_get_freq(struct hostapd_data *hapd, int chan) | |
963 | { | |
964 | int i; | |
965 | ||
966 | if (!hapd->iface->current_mode) | |
967 | return 0; | |
968 | ||
969 | for (i = 0; i < hapd->iface->current_mode->num_channels; i++) { | |
970 | struct hostapd_channel_data *ch = | |
971 | &hapd->iface->current_mode->channels[i]; | |
972 | if (ch->chan == chan) | |
973 | return ch->freq; | |
974 | } | |
975 | ||
976 | return 0; | |
977 | } | |
978 | ||
979 | ||
980 | int hostapd_hw_get_channel(struct hostapd_data *hapd, int freq) | |
981 | { | |
982 | int i; | |
983 | ||
984 | if (!hapd->iface->current_mode) | |
985 | return 0; | |
986 | ||
987 | for (i = 0; i < hapd->iface->current_mode->num_channels; i++) { | |
988 | struct hostapd_channel_data *ch = | |
989 | &hapd->iface->current_mode->channels[i]; | |
990 | if (ch->freq == freq) | |
991 | return ch->chan; | |
992 | } | |
993 | ||
994 | return 0; | |
995 | } |