Line data Source code
1 : /*
2 : * hostapd / IEEE 802.11n HT
3 : * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
4 : * Copyright (c) 2007-2008, Intel Corporation
5 : *
6 : * This software may be distributed under the terms of the BSD license.
7 : * See README for more details.
8 : */
9 :
10 : #include "utils/includes.h"
11 :
12 : #include "utils/common.h"
13 : #include "utils/eloop.h"
14 : #include "common/ieee802_11_defs.h"
15 : #include "hostapd.h"
16 : #include "ap_config.h"
17 : #include "sta_info.h"
18 : #include "beacon.h"
19 : #include "ieee802_11.h"
20 : #include "hw_features.h"
21 : #include "ap_drv_ops.h"
22 :
23 :
24 15251 : u8 * hostapd_eid_ht_capabilities(struct hostapd_data *hapd, u8 *eid)
25 : {
26 : struct ieee80211_ht_capabilities *cap;
27 15251 : u8 *pos = eid;
28 :
29 30413 : if (!hapd->iconf->ieee80211n || !hapd->iface->current_mode ||
30 15162 : hapd->conf->disable_11n)
31 294 : return eid;
32 :
33 14957 : *pos++ = WLAN_EID_HT_CAP;
34 14957 : *pos++ = sizeof(*cap);
35 :
36 14957 : cap = (struct ieee80211_ht_capabilities *) pos;
37 14957 : os_memset(cap, 0, sizeof(*cap));
38 14957 : cap->ht_capabilities_info = host_to_le16(hapd->iconf->ht_capab);
39 14957 : cap->a_mpdu_params = hapd->iface->current_mode->a_mpdu_params;
40 14957 : os_memcpy(cap->supported_mcs_set, hapd->iface->current_mode->mcs_set,
41 : 16);
42 :
43 : /* TODO: ht_extended_capabilities (now fully disabled) */
44 : /* TODO: tx_bf_capability_info (now fully disabled) */
45 : /* TODO: asel_capabilities (now fully disabled) */
46 :
47 14957 : pos += sizeof(*cap);
48 :
49 14957 : if (hapd->iconf->obss_interval) {
50 : struct ieee80211_obss_scan_parameters *scan_params;
51 :
52 23 : *pos++ = WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS;
53 23 : *pos++ = sizeof(*scan_params);
54 :
55 23 : scan_params = (struct ieee80211_obss_scan_parameters *) pos;
56 23 : os_memset(scan_params, 0, sizeof(*scan_params));
57 23 : scan_params->width_trigger_scan_interval =
58 23 : host_to_le16(hapd->iconf->obss_interval);
59 :
60 : /* Fill in default values for remaining parameters
61 : * (IEEE Std 802.11-2012, 8.4.2.61 and MIB defval) */
62 23 : scan_params->scan_passive_dwell =
63 : host_to_le16(20);
64 23 : scan_params->scan_active_dwell =
65 : host_to_le16(10);
66 23 : scan_params->scan_passive_total_per_channel =
67 : host_to_le16(200);
68 23 : scan_params->scan_active_total_per_channel =
69 : host_to_le16(20);
70 23 : scan_params->channel_transition_delay_factor =
71 : host_to_le16(5);
72 23 : scan_params->scan_activity_threshold =
73 : host_to_le16(25);
74 :
75 23 : pos += sizeof(*scan_params);
76 : }
77 :
78 14957 : return pos;
79 : }
80 :
81 :
82 15251 : u8 * hostapd_eid_ht_operation(struct hostapd_data *hapd, u8 *eid)
83 : {
84 : struct ieee80211_ht_operation *oper;
85 15251 : u8 *pos = eid;
86 :
87 15251 : if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
88 294 : return eid;
89 :
90 14957 : *pos++ = WLAN_EID_HT_OPERATION;
91 14957 : *pos++ = sizeof(*oper);
92 :
93 14957 : oper = (struct ieee80211_ht_operation *) pos;
94 14957 : os_memset(oper, 0, sizeof(*oper));
95 :
96 14957 : oper->primary_chan = hapd->iconf->channel;
97 14957 : oper->operation_mode = host_to_le16(hapd->iface->ht_op_mode);
98 14957 : if (hapd->iconf->secondary_channel == 1)
99 195 : oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE |
100 : HT_INFO_HT_PARAM_STA_CHNL_WIDTH;
101 14957 : if (hapd->iconf->secondary_channel == -1)
102 57 : oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW |
103 : HT_INFO_HT_PARAM_STA_CHNL_WIDTH;
104 :
105 14957 : pos += sizeof(*oper);
106 :
107 14957 : return pos;
108 : }
109 :
110 :
111 10167 : u8 * hostapd_eid_secondary_channel(struct hostapd_data *hapd, u8 *eid)
112 : {
113 : u8 sec_ch;
114 :
115 10196 : if (!hapd->cs_freq_params.channel ||
116 29 : !hapd->cs_freq_params.sec_channel_offset)
117 10159 : return eid;
118 :
119 8 : if (hapd->cs_freq_params.sec_channel_offset == -1)
120 2 : sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW;
121 6 : else if (hapd->cs_freq_params.sec_channel_offset == 1)
122 6 : sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE;
123 : else
124 0 : return eid;
125 :
126 8 : *eid++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
127 8 : *eid++ = 1;
128 8 : *eid++ = sec_ch;
129 :
130 8 : return eid;
131 : }
132 :
133 :
134 : /*
135 : op_mode
136 : Set to 0 (HT pure) under the followign conditions
137 : - all STAs in the BSS are 20/40 MHz HT in 20/40 MHz BSS or
138 : - all STAs in the BSS are 20 MHz HT in 20 MHz BSS
139 : Set to 1 (HT non-member protection) if there may be non-HT STAs
140 : in both the primary and the secondary channel
141 : Set to 2 if only HT STAs are associated in BSS,
142 : however and at least one 20 MHz HT STA is associated
143 : Set to 3 (HT mixed mode) when one or more non-HT STAs are associated
144 : */
145 9437 : int hostapd_ht_operation_update(struct hostapd_iface *iface)
146 : {
147 : u16 cur_op_mode, new_op_mode;
148 9437 : int op_mode_changes = 0;
149 :
150 9437 : if (!iface->conf->ieee80211n || iface->conf->ht_op_mode_fixed)
151 32 : return 0;
152 :
153 9405 : wpa_printf(MSG_DEBUG, "%s current operation mode=0x%X",
154 9405 : __func__, iface->ht_op_mode);
155 :
156 9405 : if (!(iface->ht_op_mode & HT_OPER_OP_MODE_NON_GF_HT_STAS_PRESENT)
157 9405 : && iface->num_sta_ht_no_gf) {
158 0 : iface->ht_op_mode |= HT_OPER_OP_MODE_NON_GF_HT_STAS_PRESENT;
159 0 : op_mode_changes++;
160 9405 : } else if ((iface->ht_op_mode &
161 0 : HT_OPER_OP_MODE_NON_GF_HT_STAS_PRESENT) &&
162 0 : iface->num_sta_ht_no_gf == 0) {
163 0 : iface->ht_op_mode &= ~HT_OPER_OP_MODE_NON_GF_HT_STAS_PRESENT;
164 0 : op_mode_changes++;
165 : }
166 :
167 18741 : if (!(iface->ht_op_mode & HT_OPER_OP_MODE_OBSS_NON_HT_STAS_PRESENT) &&
168 18634 : (iface->num_sta_no_ht || iface->olbc_ht)) {
169 44 : iface->ht_op_mode |= HT_OPER_OP_MODE_OBSS_NON_HT_STAS_PRESENT;
170 44 : op_mode_changes++;
171 9361 : } else if ((iface->ht_op_mode &
172 69 : HT_OPER_OP_MODE_OBSS_NON_HT_STAS_PRESENT) &&
173 113 : (iface->num_sta_no_ht == 0 && !iface->olbc_ht)) {
174 39 : iface->ht_op_mode &= ~HT_OPER_OP_MODE_OBSS_NON_HT_STAS_PRESENT;
175 39 : op_mode_changes++;
176 : }
177 :
178 9405 : if (iface->num_sta_no_ht)
179 63 : new_op_mode = HT_PROT_NON_HT_MIXED;
180 9342 : else if (iface->conf->secondary_channel && iface->num_sta_ht_20mhz)
181 0 : new_op_mode = HT_PROT_20MHZ_PROTECTION;
182 9342 : else if (iface->olbc_ht)
183 11 : new_op_mode = HT_PROT_NONMEMBER_PROTECTION;
184 : else
185 9331 : new_op_mode = HT_PROT_NO_PROTECTION;
186 :
187 9405 : cur_op_mode = iface->ht_op_mode & HT_OPER_OP_MODE_HT_PROT_MASK;
188 9405 : if (cur_op_mode != new_op_mode) {
189 85 : iface->ht_op_mode &= ~HT_OPER_OP_MODE_HT_PROT_MASK;
190 85 : iface->ht_op_mode |= new_op_mode;
191 85 : op_mode_changes++;
192 : }
193 :
194 9405 : wpa_printf(MSG_DEBUG, "%s new operation mode=0x%X changes=%d",
195 9405 : __func__, iface->ht_op_mode, op_mode_changes);
196 :
197 9405 : return op_mode_changes;
198 : }
199 :
200 :
201 4 : static int is_40_allowed(struct hostapd_iface *iface, int channel)
202 : {
203 : int pri_freq, sec_freq;
204 : int affected_start, affected_end;
205 4 : int pri = 2407 + 5 * channel;
206 :
207 4 : if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
208 0 : return 1;
209 :
210 4 : pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel);
211 :
212 4 : if (iface->conf->secondary_channel > 0)
213 1 : sec_freq = pri_freq + 20;
214 : else
215 3 : sec_freq = pri_freq - 20;
216 :
217 4 : affected_start = (pri_freq + sec_freq) / 2 - 25;
218 4 : affected_end = (pri_freq + sec_freq) / 2 + 25;
219 4 : if ((pri < affected_start || pri > affected_end))
220 1 : return 1; /* not within affected channel range */
221 :
222 3 : wpa_printf(MSG_ERROR, "40 MHz affected channel range: [%d,%d] MHz",
223 : affected_start, affected_end);
224 3 : wpa_printf(MSG_ERROR, "Neighboring BSS: freq=%d", pri);
225 3 : return 0;
226 : }
227 :
228 :
229 14 : void hostapd_2040_coex_action(struct hostapd_data *hapd,
230 : const struct ieee80211_mgmt *mgmt, size_t len)
231 : {
232 14 : struct hostapd_iface *iface = hapd->iface;
233 : struct ieee80211_2040_bss_coex_ie *bc_ie;
234 : struct ieee80211_2040_intol_chan_report *ic_report;
235 14 : int is_ht40_allowed = 1;
236 : int i;
237 14 : const u8 *start = (const u8 *) mgmt;
238 14 : const u8 *data = start + IEEE80211_HDRLEN + 2;
239 :
240 14 : hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
241 : HOSTAPD_LEVEL_DEBUG, "hostapd_public_action - action=%d",
242 14 : mgmt->u.action.u.public_action.action);
243 :
244 14 : if (!(iface->conf->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
245 0 : return;
246 :
247 14 : if (len < IEEE80211_HDRLEN + 2 + sizeof(*bc_ie))
248 3 : return;
249 :
250 11 : bc_ie = (struct ieee80211_2040_bss_coex_ie *) data;
251 21 : if (bc_ie->element_id != WLAN_EID_20_40_BSS_COEXISTENCE ||
252 10 : bc_ie->length < 1) {
253 4 : wpa_printf(MSG_DEBUG, "Unexpected IE (%u,%u) in coex report",
254 4 : bc_ie->element_id, bc_ie->length);
255 2 : return;
256 : }
257 9 : if (len < IEEE80211_HDRLEN + 2 + 2 + bc_ie->length)
258 1 : return;
259 8 : data += 2 + bc_ie->length;
260 :
261 8 : wpa_printf(MSG_DEBUG, "20/40 BSS Coexistence Information field: 0x%x",
262 8 : bc_ie->coex_param);
263 8 : if (bc_ie->coex_param & WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ) {
264 4 : hostapd_logger(hapd, mgmt->sa,
265 : HOSTAPD_MODULE_IEEE80211,
266 : HOSTAPD_LEVEL_DEBUG,
267 : "20 MHz BSS width request bit is set in BSS coexistence information field");
268 4 : is_ht40_allowed = 0;
269 : }
270 :
271 8 : if (bc_ie->coex_param & WLAN_20_40_BSS_COEX_40MHZ_INTOL) {
272 1 : hostapd_logger(hapd, mgmt->sa,
273 : HOSTAPD_MODULE_IEEE80211,
274 : HOSTAPD_LEVEL_DEBUG,
275 : "40 MHz intolerant bit is set in BSS coexistence information field");
276 1 : is_ht40_allowed = 0;
277 : }
278 :
279 14 : if (start + len - data >= 3 &&
280 12 : data[0] == WLAN_EID_20_40_BSS_INTOLERANT && data[1] >= 1) {
281 6 : u8 ielen = data[1];
282 :
283 6 : if (ielen > start + len - data - 2)
284 1 : return;
285 5 : ic_report = (struct ieee80211_2040_intol_chan_report *) data;
286 5 : wpa_printf(MSG_DEBUG,
287 : "20/40 BSS Intolerant Channel Report: Operating Class %u",
288 5 : ic_report->op_class);
289 :
290 : /* Go through the channel report to find any BSS there in the
291 : * affected channel range */
292 9 : for (i = 0; i < ielen - 1; i++) {
293 4 : u8 chan = ic_report->variable[i];
294 :
295 4 : if (is_40_allowed(iface, chan))
296 1 : continue;
297 3 : hostapd_logger(hapd, mgmt->sa,
298 : HOSTAPD_MODULE_IEEE80211,
299 : HOSTAPD_LEVEL_DEBUG,
300 : "20_40_INTOLERANT channel %d reported",
301 : chan);
302 3 : is_ht40_allowed = 0;
303 : }
304 : }
305 7 : wpa_printf(MSG_DEBUG, "is_ht40_allowed=%d num_sta_ht40_intolerant=%d",
306 : is_ht40_allowed, iface->num_sta_ht40_intolerant);
307 :
308 10 : if (!is_ht40_allowed &&
309 3 : (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX)) {
310 3 : if (iface->conf->secondary_channel) {
311 3 : hostapd_logger(hapd, mgmt->sa,
312 : HOSTAPD_MODULE_IEEE80211,
313 : HOSTAPD_LEVEL_INFO,
314 : "Switching to 20 MHz operation");
315 3 : iface->conf->secondary_channel = 0;
316 3 : ieee802_11_set_beacons(iface);
317 : }
318 6 : if (!iface->num_sta_ht40_intolerant &&
319 3 : iface->conf->obss_interval) {
320 : unsigned int delay_time;
321 2 : delay_time = OVERLAPPING_BSS_TRANS_DELAY_FACTOR *
322 2 : iface->conf->obss_interval;
323 2 : eloop_cancel_timeout(ap_ht2040_timeout, hapd->iface,
324 : NULL);
325 2 : eloop_register_timeout(delay_time, 0, ap_ht2040_timeout,
326 2 : hapd->iface, NULL);
327 2 : wpa_printf(MSG_DEBUG,
328 : "Reschedule HT 20/40 timeout to occur in %u seconds",
329 : delay_time);
330 : }
331 : }
332 : }
333 :
334 :
335 4960 : u16 copy_sta_ht_capab(struct hostapd_data *hapd, struct sta_info *sta,
336 : const u8 *ht_capab)
337 : {
338 : /*
339 : * Disable HT caps for STAs associated to no-HT BSSes, or for stations
340 : * that did not specify a valid WMM IE in the (Re)Association Request
341 : * frame.
342 : */
343 9833 : if (!ht_capab ||
344 9746 : !(sta->flags & WLAN_STA_WMM) || hapd->conf->disable_11n) {
345 87 : sta->flags &= ~WLAN_STA_HT;
346 87 : os_free(sta->ht_capabilities);
347 87 : sta->ht_capabilities = NULL;
348 87 : return WLAN_STATUS_SUCCESS;
349 : }
350 :
351 4873 : if (sta->ht_capabilities == NULL) {
352 4414 : sta->ht_capabilities =
353 4414 : os_zalloc(sizeof(struct ieee80211_ht_capabilities));
354 4414 : if (sta->ht_capabilities == NULL)
355 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
356 : }
357 :
358 4873 : sta->flags |= WLAN_STA_HT;
359 4873 : os_memcpy(sta->ht_capabilities, ht_capab,
360 : sizeof(struct ieee80211_ht_capabilities));
361 :
362 4873 : return WLAN_STATUS_SUCCESS;
363 : }
364 :
365 :
366 1 : void ht40_intolerant_add(struct hostapd_iface *iface, struct sta_info *sta)
367 : {
368 1 : if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
369 0 : return;
370 :
371 6 : wpa_printf(MSG_INFO, "HT: Forty MHz Intolerant is set by STA " MACSTR
372 6 : " in Association Request", MAC2STR(sta->addr));
373 :
374 1 : if (sta->ht40_intolerant_set)
375 0 : return;
376 :
377 1 : sta->ht40_intolerant_set = 1;
378 1 : iface->num_sta_ht40_intolerant++;
379 1 : eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
380 :
381 2 : if (iface->conf->secondary_channel &&
382 1 : (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX)) {
383 1 : iface->conf->secondary_channel = 0;
384 1 : ieee802_11_set_beacons(iface);
385 : }
386 : }
387 :
388 :
389 4517 : void ht40_intolerant_remove(struct hostapd_iface *iface, struct sta_info *sta)
390 : {
391 4517 : if (!sta->ht40_intolerant_set)
392 9033 : return;
393 :
394 1 : sta->ht40_intolerant_set = 0;
395 1 : iface->num_sta_ht40_intolerant--;
396 :
397 2 : if (iface->num_sta_ht40_intolerant == 0 &&
398 2 : (iface->conf->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) &&
399 1 : (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX)) {
400 1 : unsigned int delay_time = OVERLAPPING_BSS_TRANS_DELAY_FACTOR *
401 1 : iface->conf->obss_interval;
402 1 : wpa_printf(MSG_DEBUG,
403 : "HT: Start 20->40 MHz transition timer (%d seconds)",
404 : delay_time);
405 1 : eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
406 1 : eloop_register_timeout(delay_time, 0, ap_ht2040_timeout,
407 : iface, NULL);
408 : }
409 : }
410 :
411 :
412 4856 : static void update_sta_ht(struct hostapd_data *hapd, struct sta_info *sta)
413 : {
414 : u16 ht_capab;
415 :
416 4856 : ht_capab = le_to_host16(sta->ht_capabilities->ht_capabilities_info);
417 33992 : wpa_printf(MSG_DEBUG, "HT: STA " MACSTR " HT Capabilities Info: "
418 29136 : "0x%04x", MAC2STR(sta->addr), ht_capab);
419 4856 : if ((ht_capab & HT_CAP_INFO_GREEN_FIELD) == 0) {
420 0 : if (!sta->no_ht_gf_set) {
421 0 : sta->no_ht_gf_set = 1;
422 0 : hapd->iface->num_sta_ht_no_gf++;
423 : }
424 0 : wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - no greenfield, num "
425 : "of non-gf stations %d",
426 0 : __func__, MAC2STR(sta->addr),
427 0 : hapd->iface->num_sta_ht_no_gf);
428 : }
429 4856 : if ((ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) == 0) {
430 4647 : if (!sta->ht_20mhz_set) {
431 4208 : sta->ht_20mhz_set = 1;
432 4208 : hapd->iface->num_sta_ht_20mhz++;
433 : }
434 32529 : wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - 20 MHz HT, num of "
435 : "20MHz HT STAs %d",
436 27882 : __func__, MAC2STR(sta->addr),
437 4647 : hapd->iface->num_sta_ht_20mhz);
438 : }
439 :
440 4856 : if (ht_capab & HT_CAP_INFO_40MHZ_INTOLERANT)
441 1 : ht40_intolerant_add(hapd->iface, sta);
442 4856 : }
443 :
444 :
445 57 : static void update_sta_no_ht(struct hostapd_data *hapd, struct sta_info *sta)
446 : {
447 57 : if (!sta->no_ht_set) {
448 56 : sta->no_ht_set = 1;
449 56 : hapd->iface->num_sta_no_ht++;
450 : }
451 57 : if (hapd->iconf->ieee80211n) {
452 322 : wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - no HT, num of "
453 : "non-HT stations %d",
454 276 : __func__, MAC2STR(sta->addr),
455 46 : hapd->iface->num_sta_no_ht);
456 : }
457 57 : }
458 :
459 :
460 4913 : void update_ht_state(struct hostapd_data *hapd, struct sta_info *sta)
461 : {
462 4913 : if ((sta->flags & WLAN_STA_HT) && sta->ht_capabilities)
463 4856 : update_sta_ht(hapd, sta);
464 : else
465 57 : update_sta_no_ht(hapd, sta);
466 :
467 4913 : if (hostapd_ht_operation_update(hapd->iface) > 0)
468 39 : ieee802_11_set_beacons(hapd->iface);
469 4913 : }
470 :
471 :
472 4699 : void hostapd_get_ht_capab(struct hostapd_data *hapd,
473 : struct ieee80211_ht_capabilities *ht_cap,
474 : struct ieee80211_ht_capabilities *neg_ht_cap)
475 : {
476 : u16 cap;
477 :
478 4699 : if (ht_cap == NULL)
479 4699 : return;
480 4699 : os_memcpy(neg_ht_cap, ht_cap, sizeof(*neg_ht_cap));
481 4699 : cap = le_to_host16(neg_ht_cap->ht_capabilities_info);
482 :
483 : /*
484 : * Mask out HT features we don't support, but don't overwrite
485 : * non-symmetric features like STBC and SMPS. Just because
486 : * we're not in dynamic SMPS mode the STA might still be.
487 : */
488 4699 : cap &= (hapd->iconf->ht_capab | HT_CAP_INFO_RX_STBC_MASK |
489 : HT_CAP_INFO_TX_STBC | HT_CAP_INFO_SMPS_MASK);
490 :
491 : /*
492 : * STBC needs to be handled specially
493 : * if we don't support RX STBC, mask out TX STBC in the STA's HT caps
494 : * if we don't support TX STBC, mask out RX STBC in the STA's HT caps
495 : */
496 4699 : if (!(hapd->iconf->ht_capab & HT_CAP_INFO_RX_STBC_MASK))
497 4699 : cap &= ~HT_CAP_INFO_TX_STBC;
498 4699 : if (!(hapd->iconf->ht_capab & HT_CAP_INFO_TX_STBC))
499 4699 : cap &= ~HT_CAP_INFO_RX_STBC_MASK;
500 :
501 4699 : neg_ht_cap->ht_capabilities_info = host_to_le16(cap);
502 : }
503 :
504 :
505 3 : void ap_ht2040_timeout(void *eloop_data, void *user_data)
506 : {
507 3 : struct hostapd_iface *iface = eloop_data;
508 :
509 3 : wpa_printf(MSG_INFO, "Switching to 40 MHz operation");
510 :
511 3 : iface->conf->secondary_channel = iface->secondary_ch;
512 3 : ieee802_11_set_beacons(iface);
513 3 : }
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