1 /*
2 * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response
3 * Copyright (c) 2002-2004, Instant802 Networks, Inc.
4 * Copyright (c) 2005-2006, Devicescape Software, Inc.
5 * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
6 *
7 * This software may be distributed under the terms of the BSD license.
8 * See README for more details.
9 */
10
11 #include "utils/includes.h"
12
13 #ifndef CONFIG_NATIVE_WINDOWS
14
15 #include "utils/common.h"
16 #include "common/ieee802_11_defs.h"
17 #include "common/ieee802_11_common.h"
18 #include "common/hw_features_common.h"
19 #include "wps/wps_defs.h"
20 #include "p2p/p2p.h"
21 #include "hostapd.h"
22 #include "ieee802_11.h"
23 #include "wpa_auth.h"
24 #include "wmm.h"
25 #include "ap_config.h"
26 #include "sta_info.h"
27 #include "p2p_hostapd.h"
28 #include "ap_drv_ops.h"
29 #include "beacon.h"
30 #include "hs20.h"
31 #include "dfs.h"
32 #include "taxonomy.h"
33
34
35 #ifdef NEED_AP_MLME
36
hostapd_eid_rm_enabled_capab(struct hostapd_data * hapd,u8 * eid,size_t len)37 static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
38 size_t len)
39 {
40 size_t i;
41
42 for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) {
43 if (hapd->conf->radio_measurements[i])
44 break;
45 }
46
47 if (i == RRM_CAPABILITIES_IE_LEN || len < 2 + RRM_CAPABILITIES_IE_LEN)
48 return eid;
49
50 *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
51 *eid++ = RRM_CAPABILITIES_IE_LEN;
52 os_memcpy(eid, hapd->conf->radio_measurements, RRM_CAPABILITIES_IE_LEN);
53
54 return eid + RRM_CAPABILITIES_IE_LEN;
55 }
56
57
hostapd_eid_bss_load(struct hostapd_data * hapd,u8 * eid,size_t len)58 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
59 {
60 if (len < 2 + 5)
61 return eid;
62
63 #ifdef CONFIG_TESTING_OPTIONS
64 if (hapd->conf->bss_load_test_set) {
65 *eid++ = WLAN_EID_BSS_LOAD;
66 *eid++ = 5;
67 os_memcpy(eid, hapd->conf->bss_load_test, 5);
68 eid += 5;
69 return eid;
70 }
71 #endif /* CONFIG_TESTING_OPTIONS */
72 if (hapd->conf->bss_load_update_period) {
73 *eid++ = WLAN_EID_BSS_LOAD;
74 *eid++ = 5;
75 WPA_PUT_LE16(eid, hapd->num_sta);
76 eid += 2;
77 *eid++ = hapd->iface->channel_utilization;
78 WPA_PUT_LE16(eid, 0); /* no available admission capabity */
79 eid += 2;
80 }
81 return eid;
82 }
83
84
ieee802_11_erp_info(struct hostapd_data * hapd)85 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
86 {
87 u8 erp = 0;
88
89 if (hapd->iface->current_mode == NULL ||
90 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
91 return 0;
92
93 if (hapd->iface->olbc)
94 erp |= ERP_INFO_USE_PROTECTION;
95 if (hapd->iface->num_sta_non_erp > 0) {
96 erp |= ERP_INFO_NON_ERP_PRESENT |
97 ERP_INFO_USE_PROTECTION;
98 }
99 if (hapd->iface->num_sta_no_short_preamble > 0 ||
100 hapd->iconf->preamble == LONG_PREAMBLE)
101 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
102
103 return erp;
104 }
105
106
hostapd_eid_ds_params(struct hostapd_data * hapd,u8 * eid)107 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
108 {
109 *eid++ = WLAN_EID_DS_PARAMS;
110 *eid++ = 1;
111 *eid++ = hapd->iconf->channel;
112 return eid;
113 }
114
115
hostapd_eid_erp_info(struct hostapd_data * hapd,u8 * eid)116 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
117 {
118 if (hapd->iface->current_mode == NULL ||
119 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
120 return eid;
121
122 /* Set NonERP_present and use_protection bits if there
123 * are any associated NonERP stations. */
124 /* TODO: use_protection bit can be set to zero even if
125 * there are NonERP stations present. This optimization
126 * might be useful if NonERP stations are "quiet".
127 * See 802.11g/D6 E-1 for recommended practice.
128 * In addition, Non ERP present might be set, if AP detects Non ERP
129 * operation on other APs. */
130
131 /* Add ERP Information element */
132 *eid++ = WLAN_EID_ERP_INFO;
133 *eid++ = 1;
134 *eid++ = ieee802_11_erp_info(hapd);
135
136 return eid;
137 }
138
139
hostapd_eid_pwr_constraint(struct hostapd_data * hapd,u8 * eid)140 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
141 {
142 u8 *pos = eid;
143 u8 local_pwr_constraint = 0;
144 int dfs;
145
146 if (hapd->iface->current_mode == NULL ||
147 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
148 return eid;
149
150 /* Let host drivers add this IE if DFS support is offloaded */
151 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
152 return eid;
153
154 /*
155 * There is no DFS support and power constraint was not directly
156 * requested by config option.
157 */
158 if (!hapd->iconf->ieee80211h &&
159 hapd->iconf->local_pwr_constraint == -1)
160 return eid;
161
162 /* Check if DFS is required by regulatory. */
163 dfs = hostapd_is_dfs_required(hapd->iface);
164 if (dfs < 0) {
165 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
166 dfs);
167 dfs = 0;
168 }
169
170 if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
171 return eid;
172
173 /*
174 * ieee80211h (DFS) is enabled so Power Constraint element shall
175 * be added when running on DFS channel whenever local_pwr_constraint
176 * is configured or not. In order to meet regulations when TPC is not
177 * implemented using a transmit power that is below the legal maximum
178 * (including any mitigation factor) should help. In this case,
179 * indicate 3 dB below maximum allowed transmit power.
180 */
181 if (hapd->iconf->local_pwr_constraint == -1)
182 local_pwr_constraint = 3;
183
184 /*
185 * A STA that is not an AP shall use a transmit power less than or
186 * equal to the local maximum transmit power level for the channel.
187 * The local maximum transmit power can be calculated from the formula:
188 * local max TX pwr = max TX pwr - local pwr constraint
189 * Where max TX pwr is maximum transmit power level specified for
190 * channel in Country element and local pwr constraint is specified
191 * for channel in this Power Constraint element.
192 */
193
194 /* Element ID */
195 *pos++ = WLAN_EID_PWR_CONSTRAINT;
196 /* Length */
197 *pos++ = 1;
198 /* Local Power Constraint */
199 if (local_pwr_constraint)
200 *pos++ = local_pwr_constraint;
201 else
202 *pos++ = hapd->iconf->local_pwr_constraint;
203
204 return pos;
205 }
206
207
hostapd_eid_country_add(u8 * pos,u8 * end,int chan_spacing,struct hostapd_channel_data * start,struct hostapd_channel_data * prev)208 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
209 struct hostapd_channel_data *start,
210 struct hostapd_channel_data *prev)
211 {
212 if (end - pos < 3)
213 return pos;
214
215 /* first channel number */
216 *pos++ = start->chan;
217 /* number of channels */
218 *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
219 /* maximum transmit power level */
220 *pos++ = start->max_tx_power;
221
222 return pos;
223 }
224
225
hostapd_eid_country(struct hostapd_data * hapd,u8 * eid,int max_len)226 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
227 int max_len)
228 {
229 u8 *pos = eid;
230 u8 *end = eid + max_len;
231 int i;
232 struct hostapd_hw_modes *mode;
233 struct hostapd_channel_data *start, *prev;
234 int chan_spacing = 1;
235
236 if (!hapd->iconf->ieee80211d || max_len < 6 ||
237 hapd->iface->current_mode == NULL)
238 return eid;
239
240 *pos++ = WLAN_EID_COUNTRY;
241 pos++; /* length will be set later */
242 os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
243 pos += 3;
244
245 mode = hapd->iface->current_mode;
246 if (mode->mode == HOSTAPD_MODE_IEEE80211A)
247 chan_spacing = 4;
248
249 start = prev = NULL;
250 for (i = 0; i < mode->num_channels; i++) {
251 struct hostapd_channel_data *chan = &mode->channels[i];
252 if (chan->flag & HOSTAPD_CHAN_DISABLED)
253 continue;
254 if (start && prev &&
255 prev->chan + chan_spacing == chan->chan &&
256 start->max_tx_power == chan->max_tx_power) {
257 prev = chan;
258 continue; /* can use same entry */
259 }
260
261 if (start && prev) {
262 pos = hostapd_eid_country_add(pos, end, chan_spacing,
263 start, prev);
264 start = NULL;
265 }
266
267 /* Start new group */
268 start = prev = chan;
269 }
270
271 if (start) {
272 pos = hostapd_eid_country_add(pos, end, chan_spacing,
273 start, prev);
274 }
275
276 if ((pos - eid) & 1) {
277 if (end - pos < 1)
278 return eid;
279 *pos++ = 0; /* pad for 16-bit alignment */
280 }
281
282 eid[1] = (pos - eid) - 2;
283
284 return pos;
285 }
286
287
hostapd_eid_wpa(struct hostapd_data * hapd,u8 * eid,size_t len)288 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
289 {
290 const u8 *ie;
291 size_t ielen;
292
293 ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
294 if (ie == NULL || ielen > len)
295 return eid;
296
297 os_memcpy(eid, ie, ielen);
298 return eid + ielen;
299 }
300
301
hostapd_eid_csa(struct hostapd_data * hapd,u8 * eid)302 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
303 {
304 #ifdef CONFIG_TESTING_OPTIONS
305 if (hapd->iface->cs_oper_class && hapd->iconf->ecsa_ie_only)
306 return eid;
307 #endif /* CONFIG_TESTING_OPTIONS */
308
309 if (!hapd->cs_freq_params.channel)
310 return eid;
311
312 *eid++ = WLAN_EID_CHANNEL_SWITCH;
313 *eid++ = 3;
314 *eid++ = hapd->cs_block_tx;
315 *eid++ = hapd->cs_freq_params.channel;
316 *eid++ = hapd->cs_count;
317
318 return eid;
319 }
320
321
hostapd_eid_ecsa(struct hostapd_data * hapd,u8 * eid)322 static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid)
323 {
324 if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class)
325 return eid;
326
327 *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN;
328 *eid++ = 4;
329 *eid++ = hapd->cs_block_tx;
330 *eid++ = hapd->iface->cs_oper_class;
331 *eid++ = hapd->cs_freq_params.channel;
332 *eid++ = hapd->cs_count;
333
334 return eid;
335 }
336
337
hostapd_eid_supported_op_classes(struct hostapd_data * hapd,u8 * eid)338 static u8 * hostapd_eid_supported_op_classes(struct hostapd_data *hapd, u8 *eid)
339 {
340 u8 op_class, channel;
341
342 if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) ||
343 !hapd->iface->freq)
344 return eid;
345
346 if (ieee80211_freq_to_channel_ext(hapd->iface->freq,
347 hapd->iconf->secondary_channel,
348 hapd->iconf->vht_oper_chwidth,
349 &op_class, &channel) ==
350 NUM_HOSTAPD_MODES)
351 return eid;
352
353 *eid++ = WLAN_EID_SUPPORTED_OPERATING_CLASSES;
354 *eid++ = 2;
355
356 /* Current Operating Class */
357 *eid++ = op_class;
358
359 /* TODO: Advertise all the supported operating classes */
360 *eid++ = 0;
361
362 return eid;
363 }
364
365
366 #ifdef CONFIG_OWE
hostapd_eid_owe_trans_enabled(struct hostapd_data * hapd)367 static int hostapd_eid_owe_trans_enabled(struct hostapd_data *hapd)
368 {
369 return hapd->conf->owe_transition_ssid_len > 0 &&
370 !is_zero_ether_addr(hapd->conf->owe_transition_bssid);
371 }
372 #endif /* CONFIG_OWE */
373
374
hostapd_eid_owe_trans_len(struct hostapd_data * hapd)375 static size_t hostapd_eid_owe_trans_len(struct hostapd_data *hapd)
376 {
377 #ifdef CONFIG_OWE
378 if (!hostapd_eid_owe_trans_enabled(hapd))
379 return 0;
380 return 6 + ETH_ALEN + 1 + hapd->conf->owe_transition_ssid_len;
381 #else /* CONFIG_OWE */
382 return 0;
383 #endif /* CONFIG_OWE */
384 }
385
386
hostapd_eid_owe_trans(struct hostapd_data * hapd,u8 * eid,size_t len)387 static u8 * hostapd_eid_owe_trans(struct hostapd_data *hapd, u8 *eid,
388 size_t len)
389 {
390 #ifdef CONFIG_OWE
391 u8 *pos = eid;
392 size_t elen;
393
394 if (hapd->conf->owe_transition_ifname[0] &&
395 !hostapd_eid_owe_trans_enabled(hapd))
396 hostapd_owe_trans_get_info(hapd);
397
398 if (!hostapd_eid_owe_trans_enabled(hapd))
399 return pos;
400
401 elen = hostapd_eid_owe_trans_len(hapd);
402 if (len < elen) {
403 wpa_printf(MSG_DEBUG,
404 "OWE: Not enough room in the buffer for OWE IE");
405 return pos;
406 }
407
408 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
409 *pos++ = elen - 2;
410 WPA_PUT_BE24(pos, OUI_WFA);
411 pos += 3;
412 *pos++ = OWE_OUI_TYPE;
413 os_memcpy(pos, hapd->conf->owe_transition_bssid, ETH_ALEN);
414 pos += ETH_ALEN;
415 *pos++ = hapd->conf->owe_transition_ssid_len;
416 os_memcpy(pos, hapd->conf->owe_transition_ssid,
417 hapd->conf->owe_transition_ssid_len);
418 pos += hapd->conf->owe_transition_ssid_len;
419
420 return pos;
421 #else /* CONFIG_OWE */
422 return eid;
423 #endif /* CONFIG_OWE */
424 }
425
426
hostapd_gen_probe_resp(struct hostapd_data * hapd,const struct ieee80211_mgmt * req,int is_p2p,size_t * resp_len)427 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
428 const struct ieee80211_mgmt *req,
429 int is_p2p, size_t *resp_len)
430 {
431 struct ieee80211_mgmt *resp;
432 u8 *pos, *epos, *csa_pos;
433 size_t buflen;
434
435 #define MAX_PROBERESP_LEN 768
436 buflen = MAX_PROBERESP_LEN;
437 #ifdef CONFIG_WPS
438 if (hapd->wps_probe_resp_ie)
439 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
440 #endif /* CONFIG_WPS */
441 #ifdef CONFIG_P2P
442 if (hapd->p2p_probe_resp_ie)
443 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
444 #endif /* CONFIG_P2P */
445 #ifdef CONFIG_FST
446 if (hapd->iface->fst_ies)
447 buflen += wpabuf_len(hapd->iface->fst_ies);
448 #endif /* CONFIG_FST */
449 if (hapd->conf->vendor_elements)
450 buflen += wpabuf_len(hapd->conf->vendor_elements);
451 if (hapd->conf->vendor_vht) {
452 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
453 2 + sizeof(struct ieee80211_vht_operation);
454 }
455
456 #ifdef CONFIG_IEEE80211AX
457 if (hapd->iconf->ieee80211ax) {
458 buflen += 3 + sizeof(struct ieee80211_he_capabilities) +
459 3 + sizeof(struct ieee80211_he_operation);
460 }
461 #endif /* CONFIG_IEEE80211AX */
462
463 buflen += hostapd_mbo_ie_len(hapd);
464 buflen += hostapd_eid_owe_trans_len(hapd);
465
466 resp = os_zalloc(buflen);
467 if (resp == NULL)
468 return NULL;
469
470 epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
471
472 resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
473 WLAN_FC_STYPE_PROBE_RESP);
474 if (req)
475 os_memcpy(resp->da, req->sa, ETH_ALEN);
476 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
477
478 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
479 resp->u.probe_resp.beacon_int =
480 host_to_le16(hapd->iconf->beacon_int);
481
482 /* hardware or low-level driver will setup seq_ctrl and timestamp */
483 resp->u.probe_resp.capab_info =
484 host_to_le16(hostapd_own_capab_info(hapd));
485
486 pos = resp->u.probe_resp.variable;
487 *pos++ = WLAN_EID_SSID;
488 *pos++ = hapd->conf->ssid.ssid_len;
489 os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
490 pos += hapd->conf->ssid.ssid_len;
491
492 /* Supported rates */
493 pos = hostapd_eid_supp_rates(hapd, pos);
494
495 /* DS Params */
496 pos = hostapd_eid_ds_params(hapd, pos);
497
498 pos = hostapd_eid_country(hapd, pos, epos - pos);
499
500 /* Power Constraint element */
501 pos = hostapd_eid_pwr_constraint(hapd, pos);
502
503 /* CSA IE */
504 csa_pos = hostapd_eid_csa(hapd, pos);
505 if (csa_pos != pos)
506 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1;
507 pos = csa_pos;
508
509 /* ERP Information element */
510 pos = hostapd_eid_erp_info(hapd, pos);
511
512 /* Extended supported rates */
513 pos = hostapd_eid_ext_supp_rates(hapd, pos);
514
515 /* RSN, MDIE, WPA */
516 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
517
518 pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
519
520 pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
521
522 /* eCSA IE */
523 csa_pos = hostapd_eid_ecsa(hapd, pos);
524 if (csa_pos != pos)
525 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
526 pos = csa_pos;
527
528 pos = hostapd_eid_supported_op_classes(hapd, pos);
529
530 #ifdef CONFIG_IEEE80211N
531 /* Secondary Channel Offset element */
532 /* TODO: The standard doesn't specify a position for this element. */
533 pos = hostapd_eid_secondary_channel(hapd, pos);
534
535 pos = hostapd_eid_ht_capabilities(hapd, pos);
536 pos = hostapd_eid_ht_operation(hapd, pos);
537 #endif /* CONFIG_IEEE80211N */
538
539 pos = hostapd_eid_ext_capab(hapd, pos);
540
541 pos = hostapd_eid_time_adv(hapd, pos);
542 pos = hostapd_eid_time_zone(hapd, pos);
543
544 pos = hostapd_eid_interworking(hapd, pos);
545 pos = hostapd_eid_adv_proto(hapd, pos);
546 pos = hostapd_eid_roaming_consortium(hapd, pos);
547
548 #ifdef CONFIG_FST
549 if (hapd->iface->fst_ies) {
550 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
551 wpabuf_len(hapd->iface->fst_ies));
552 pos += wpabuf_len(hapd->iface->fst_ies);
553 }
554 #endif /* CONFIG_FST */
555
556 #ifdef CONFIG_IEEE80211AC
557 if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
558 pos = hostapd_eid_vht_capabilities(hapd, pos, 0);
559 pos = hostapd_eid_vht_operation(hapd, pos);
560 pos = hostapd_eid_txpower_envelope(hapd, pos);
561 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
562 }
563 #endif /* CONFIG_IEEE80211AC */
564
565 pos = hostapd_eid_fils_indic(hapd, pos, 0);
566
567 #ifdef CONFIG_IEEE80211AX
568 if (hapd->iconf->ieee80211ax) {
569 pos = hostapd_eid_he_capab(hapd, pos);
570 pos = hostapd_eid_he_operation(hapd, pos);
571 }
572 #endif /* CONFIG_IEEE80211AX */
573
574 #ifdef CONFIG_IEEE80211AC
575 if (hapd->conf->vendor_vht)
576 pos = hostapd_eid_vendor_vht(hapd, pos);
577 #endif /* CONFIG_IEEE80211AC */
578
579 /* Wi-Fi Alliance WMM */
580 pos = hostapd_eid_wmm(hapd, pos);
581
582 #ifdef CONFIG_WPS
583 if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
584 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
585 wpabuf_len(hapd->wps_probe_resp_ie));
586 pos += wpabuf_len(hapd->wps_probe_resp_ie);
587 }
588 #endif /* CONFIG_WPS */
589
590 #ifdef CONFIG_P2P
591 if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
592 hapd->p2p_probe_resp_ie) {
593 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
594 wpabuf_len(hapd->p2p_probe_resp_ie));
595 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
596 }
597 #endif /* CONFIG_P2P */
598 #ifdef CONFIG_P2P_MANAGER
599 if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
600 P2P_MANAGE)
601 pos = hostapd_eid_p2p_manage(hapd, pos);
602 #endif /* CONFIG_P2P_MANAGER */
603
604 #ifdef CONFIG_HS20
605 pos = hostapd_eid_hs20_indication(hapd, pos);
606 pos = hostapd_eid_osen(hapd, pos);
607 #endif /* CONFIG_HS20 */
608
609 pos = hostapd_eid_mbo(hapd, pos, (u8 *) resp + buflen - pos);
610 pos = hostapd_eid_owe_trans(hapd, pos, (u8 *) resp + buflen - pos);
611
612 if (hapd->conf->vendor_elements) {
613 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
614 wpabuf_len(hapd->conf->vendor_elements));
615 pos += wpabuf_len(hapd->conf->vendor_elements);
616 }
617
618 *resp_len = pos - (u8 *) resp;
619 return (u8 *) resp;
620 }
621
622
623 enum ssid_match_result {
624 NO_SSID_MATCH,
625 EXACT_SSID_MATCH,
626 WILDCARD_SSID_MATCH
627 };
628
ssid_match(struct hostapd_data * hapd,const u8 * ssid,size_t ssid_len,const u8 * ssid_list,size_t ssid_list_len)629 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
630 const u8 *ssid, size_t ssid_len,
631 const u8 *ssid_list,
632 size_t ssid_list_len)
633 {
634 const u8 *pos, *end;
635 int wildcard = 0;
636
637 if (ssid_len == 0)
638 wildcard = 1;
639 if (ssid_len == hapd->conf->ssid.ssid_len &&
640 os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
641 return EXACT_SSID_MATCH;
642
643 if (ssid_list == NULL)
644 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
645
646 pos = ssid_list;
647 end = ssid_list + ssid_list_len;
648 while (end - pos >= 1) {
649 if (2 + pos[1] > end - pos)
650 break;
651 if (pos[1] == 0)
652 wildcard = 1;
653 if (pos[1] == hapd->conf->ssid.ssid_len &&
654 os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
655 return EXACT_SSID_MATCH;
656 pos += 2 + pos[1];
657 }
658
659 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
660 }
661
662
sta_track_expire(struct hostapd_iface * iface,int force)663 void sta_track_expire(struct hostapd_iface *iface, int force)
664 {
665 struct os_reltime now;
666 struct hostapd_sta_info *info;
667
668 if (!iface->num_sta_seen)
669 return;
670
671 os_get_reltime(&now);
672 while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
673 list))) {
674 if (!force &&
675 !os_reltime_expired(&now, &info->last_seen,
676 iface->conf->track_sta_max_age))
677 break;
678 force = 0;
679
680 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
681 MACSTR, iface->bss[0]->conf->iface,
682 MAC2STR(info->addr));
683 dl_list_del(&info->list);
684 iface->num_sta_seen--;
685 sta_track_del(info);
686 }
687 }
688
689
sta_track_get(struct hostapd_iface * iface,const u8 * addr)690 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
691 const u8 *addr)
692 {
693 struct hostapd_sta_info *info;
694
695 dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
696 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
697 return info;
698
699 return NULL;
700 }
701
702
sta_track_add(struct hostapd_iface * iface,const u8 * addr,int ssi_signal)703 void sta_track_add(struct hostapd_iface *iface, const u8 *addr, int ssi_signal)
704 {
705 struct hostapd_sta_info *info;
706
707 info = sta_track_get(iface, addr);
708 if (info) {
709 /* Move the most recent entry to the end of the list */
710 dl_list_del(&info->list);
711 dl_list_add_tail(&iface->sta_seen, &info->list);
712 os_get_reltime(&info->last_seen);
713 info->ssi_signal = ssi_signal;
714 return;
715 }
716
717 /* Add a new entry */
718 info = os_zalloc(sizeof(*info));
719 if (info == NULL)
720 return;
721 os_memcpy(info->addr, addr, ETH_ALEN);
722 os_get_reltime(&info->last_seen);
723 info->ssi_signal = ssi_signal;
724
725 if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
726 /* Expire oldest entry to make room for a new one */
727 sta_track_expire(iface, 1);
728 }
729
730 wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
731 MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
732 dl_list_add_tail(&iface->sta_seen, &info->list);
733 iface->num_sta_seen++;
734 }
735
736
737 struct hostapd_data *
sta_track_seen_on(struct hostapd_iface * iface,const u8 * addr,const char * ifname)738 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
739 const char *ifname)
740 {
741 struct hapd_interfaces *interfaces = iface->interfaces;
742 size_t i, j;
743
744 for (i = 0; i < interfaces->count; i++) {
745 struct hostapd_data *hapd = NULL;
746
747 iface = interfaces->iface[i];
748 for (j = 0; j < iface->num_bss; j++) {
749 hapd = iface->bss[j];
750 if (os_strcmp(ifname, hapd->conf->iface) == 0)
751 break;
752 hapd = NULL;
753 }
754
755 if (hapd && sta_track_get(iface, addr))
756 return hapd;
757 }
758
759 return NULL;
760 }
761
762
763 #ifdef CONFIG_TAXONOMY
sta_track_claim_taxonomy_info(struct hostapd_iface * iface,const u8 * addr,struct wpabuf ** probe_ie_taxonomy)764 void sta_track_claim_taxonomy_info(struct hostapd_iface *iface, const u8 *addr,
765 struct wpabuf **probe_ie_taxonomy)
766 {
767 struct hostapd_sta_info *info;
768
769 info = sta_track_get(iface, addr);
770 if (!info)
771 return;
772
773 wpabuf_free(*probe_ie_taxonomy);
774 *probe_ie_taxonomy = info->probe_ie_taxonomy;
775 info->probe_ie_taxonomy = NULL;
776 }
777 #endif /* CONFIG_TAXONOMY */
778
779
handle_probe_req(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ssi_signal)780 void handle_probe_req(struct hostapd_data *hapd,
781 const struct ieee80211_mgmt *mgmt, size_t len,
782 int ssi_signal)
783 {
784 u8 *resp;
785 struct ieee802_11_elems elems;
786 const u8 *ie;
787 size_t ie_len;
788 size_t i, resp_len;
789 int noack;
790 enum ssid_match_result res;
791 int ret;
792 u16 csa_offs[2];
793 size_t csa_offs_len;
794
795 if (len < IEEE80211_HDRLEN)
796 return;
797 ie = ((const u8 *) mgmt) + IEEE80211_HDRLEN;
798 if (hapd->iconf->track_sta_max_num)
799 sta_track_add(hapd->iface, mgmt->sa, ssi_signal);
800 ie_len = len - IEEE80211_HDRLEN;
801
802 for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
803 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
804 mgmt->sa, mgmt->da, mgmt->bssid,
805 ie, ie_len, ssi_signal) > 0)
806 return;
807
808 if (!hapd->iconf->send_probe_response)
809 return;
810
811 if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
812 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
813 MAC2STR(mgmt->sa));
814 return;
815 }
816
817 if ((!elems.ssid || !elems.supp_rates)) {
818 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
819 "without SSID or supported rates element",
820 MAC2STR(mgmt->sa));
821 return;
822 }
823
824 /*
825 * No need to reply if the Probe Request frame was sent on an adjacent
826 * channel. IEEE Std 802.11-2012 describes this as a requirement for an
827 * AP with dot11RadioMeasurementActivated set to true, but strictly
828 * speaking does not allow such ignoring of Probe Request frames if
829 * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
830 * number of unnecessary Probe Response frames for cases where the STA
831 * is less likely to see them (Probe Request frame sent on a
832 * neighboring, but partially overlapping, channel).
833 */
834 if (elems.ds_params &&
835 hapd->iface->current_mode &&
836 (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
837 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
838 hapd->iconf->channel != elems.ds_params[0]) {
839 wpa_printf(MSG_DEBUG,
840 "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
841 hapd->iconf->channel, elems.ds_params[0]);
842 return;
843 }
844
845 #ifdef CONFIG_P2P
846 if (hapd->p2p && hapd->p2p_group && elems.wps_ie) {
847 struct wpabuf *wps;
848 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
849 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
850 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
851 "due to mismatch with Requested Device "
852 "Type");
853 wpabuf_free(wps);
854 return;
855 }
856 wpabuf_free(wps);
857 }
858
859 if (hapd->p2p && hapd->p2p_group && elems.p2p) {
860 struct wpabuf *p2p;
861 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
862 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
863 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
864 "due to mismatch with Device ID");
865 wpabuf_free(p2p);
866 return;
867 }
868 wpabuf_free(p2p);
869 }
870 #endif /* CONFIG_P2P */
871
872 if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
873 elems.ssid_list_len == 0) {
874 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
875 "broadcast SSID ignored", MAC2STR(mgmt->sa));
876 return;
877 }
878
879 #ifdef CONFIG_P2P
880 if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
881 elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
882 os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
883 P2P_WILDCARD_SSID_LEN) == 0) {
884 /* Process P2P Wildcard SSID like Wildcard SSID */
885 elems.ssid_len = 0;
886 }
887 #endif /* CONFIG_P2P */
888
889 #ifdef CONFIG_TAXONOMY
890 {
891 struct sta_info *sta;
892 struct hostapd_sta_info *info;
893
894 if ((sta = ap_get_sta(hapd, mgmt->sa)) != NULL) {
895 taxonomy_sta_info_probe_req(hapd, sta, ie, ie_len);
896 } else if ((info = sta_track_get(hapd->iface,
897 mgmt->sa)) != NULL) {
898 taxonomy_hostapd_sta_info_probe_req(hapd, info,
899 ie, ie_len);
900 }
901 }
902 #endif /* CONFIG_TAXONOMY */
903
904 res = ssid_match(hapd, elems.ssid, elems.ssid_len,
905 elems.ssid_list, elems.ssid_list_len);
906 if (res == NO_SSID_MATCH) {
907 if (!(mgmt->da[0] & 0x01)) {
908 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
909 " for foreign SSID '%s' (DA " MACSTR ")%s",
910 MAC2STR(mgmt->sa),
911 wpa_ssid_txt(elems.ssid, elems.ssid_len),
912 MAC2STR(mgmt->da),
913 elems.ssid_list ? " (SSID list)" : "");
914 }
915 return;
916 }
917
918 #ifdef CONFIG_INTERWORKING
919 if (hapd->conf->interworking &&
920 elems.interworking && elems.interworking_len >= 1) {
921 u8 ant = elems.interworking[0] & 0x0f;
922 if (ant != INTERWORKING_ANT_WILDCARD &&
923 ant != hapd->conf->access_network_type) {
924 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
925 " for mismatching ANT %u ignored",
926 MAC2STR(mgmt->sa), ant);
927 return;
928 }
929 }
930
931 if (hapd->conf->interworking && elems.interworking &&
932 (elems.interworking_len == 7 || elems.interworking_len == 9)) {
933 const u8 *hessid;
934 if (elems.interworking_len == 7)
935 hessid = elems.interworking + 1;
936 else
937 hessid = elems.interworking + 1 + 2;
938 if (!is_broadcast_ether_addr(hessid) &&
939 os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
940 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
941 " for mismatching HESSID " MACSTR
942 " ignored",
943 MAC2STR(mgmt->sa), MAC2STR(hessid));
944 return;
945 }
946 }
947 #endif /* CONFIG_INTERWORKING */
948
949 #ifdef CONFIG_P2P
950 if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
951 supp_rates_11b_only(&elems)) {
952 /* Indicates support for 11b rates only */
953 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
954 MACSTR " with only 802.11b rates",
955 MAC2STR(mgmt->sa));
956 return;
957 }
958 #endif /* CONFIG_P2P */
959
960 /* TODO: verify that supp_rates contains at least one matching rate
961 * with AP configuration */
962
963 if (hapd->conf->no_probe_resp_if_seen_on &&
964 is_multicast_ether_addr(mgmt->da) &&
965 is_multicast_ether_addr(mgmt->bssid) &&
966 sta_track_seen_on(hapd->iface, mgmt->sa,
967 hapd->conf->no_probe_resp_if_seen_on)) {
968 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
969 " since STA has been seen on %s",
970 hapd->conf->iface, MAC2STR(mgmt->sa),
971 hapd->conf->no_probe_resp_if_seen_on);
972 return;
973 }
974
975 if (hapd->conf->no_probe_resp_if_max_sta &&
976 is_multicast_ether_addr(mgmt->da) &&
977 is_multicast_ether_addr(mgmt->bssid) &&
978 hapd->num_sta >= hapd->conf->max_num_sta &&
979 !ap_get_sta(hapd, mgmt->sa)) {
980 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
981 " since no room for additional STA",
982 hapd->conf->iface, MAC2STR(mgmt->sa));
983 return;
984 }
985
986 #ifdef CONFIG_TESTING_OPTIONS
987 if (hapd->iconf->ignore_probe_probability > 0.0 &&
988 drand48() < hapd->iconf->ignore_probe_probability) {
989 wpa_printf(MSG_INFO,
990 "TESTING: ignoring probe request from " MACSTR,
991 MAC2STR(mgmt->sa));
992 return;
993 }
994 #endif /* CONFIG_TESTING_OPTIONS */
995
996 resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
997 &resp_len);
998 if (resp == NULL)
999 return;
1000
1001 /*
1002 * If this is a broadcast probe request, apply no ack policy to avoid
1003 * excessive retries.
1004 */
1005 noack = !!(res == WILDCARD_SSID_MATCH &&
1006 is_broadcast_ether_addr(mgmt->da));
1007
1008 csa_offs_len = 0;
1009 if (hapd->csa_in_progress) {
1010 if (hapd->cs_c_off_proberesp)
1011 csa_offs[csa_offs_len++] =
1012 hapd->cs_c_off_proberesp;
1013
1014 if (hapd->cs_c_off_ecsa_proberesp)
1015 csa_offs[csa_offs_len++] =
1016 hapd->cs_c_off_ecsa_proberesp;
1017 }
1018
1019 ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack,
1020 csa_offs_len ? csa_offs : NULL,
1021 csa_offs_len);
1022
1023 if (ret < 0)
1024 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
1025
1026 os_free(resp);
1027
1028 wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
1029 "SSID", MAC2STR(mgmt->sa),
1030 elems.ssid_len == 0 ? "broadcast" : "our");
1031 }
1032
1033
hostapd_probe_resp_offloads(struct hostapd_data * hapd,size_t * resp_len)1034 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
1035 size_t *resp_len)
1036 {
1037 /* check probe response offloading caps and print warnings */
1038 if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
1039 return NULL;
1040
1041 #ifdef CONFIG_WPS
1042 if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
1043 (!(hapd->iface->probe_resp_offloads &
1044 (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
1045 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
1046 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
1047 "Probe Response while not supporting this");
1048 #endif /* CONFIG_WPS */
1049
1050 #ifdef CONFIG_P2P
1051 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
1052 !(hapd->iface->probe_resp_offloads &
1053 WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
1054 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
1055 "Probe Response while not supporting this");
1056 #endif /* CONFIG_P2P */
1057
1058 if (hapd->conf->interworking &&
1059 !(hapd->iface->probe_resp_offloads &
1060 WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
1061 wpa_printf(MSG_WARNING, "Device is trying to offload "
1062 "Interworking Probe Response while not supporting "
1063 "this");
1064
1065 /* Generate a Probe Response template for the non-P2P case */
1066 return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
1067 }
1068
1069 #endif /* NEED_AP_MLME */
1070
1071
sta_track_del(struct hostapd_sta_info * info)1072 void sta_track_del(struct hostapd_sta_info *info)
1073 {
1074 #ifdef CONFIG_TAXONOMY
1075 wpabuf_free(info->probe_ie_taxonomy);
1076 info->probe_ie_taxonomy = NULL;
1077 #endif /* CONFIG_TAXONOMY */
1078 os_free(info);
1079 }
1080
1081
ieee802_11_build_ap_params(struct hostapd_data * hapd,struct wpa_driver_ap_params * params)1082 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
1083 struct wpa_driver_ap_params *params)
1084 {
1085 struct ieee80211_mgmt *head = NULL;
1086 u8 *tail = NULL;
1087 size_t head_len = 0, tail_len = 0;
1088 u8 *resp = NULL;
1089 size_t resp_len = 0;
1090 #ifdef NEED_AP_MLME
1091 u16 capab_info;
1092 u8 *pos, *tailpos, *csa_pos;
1093
1094 #define BEACON_HEAD_BUF_SIZE 256
1095 #define BEACON_TAIL_BUF_SIZE 512
1096 head = os_zalloc(BEACON_HEAD_BUF_SIZE);
1097 tail_len = BEACON_TAIL_BUF_SIZE;
1098 #ifdef CONFIG_WPS
1099 if (hapd->conf->wps_state && hapd->wps_beacon_ie)
1100 tail_len += wpabuf_len(hapd->wps_beacon_ie);
1101 #endif /* CONFIG_WPS */
1102 #ifdef CONFIG_P2P
1103 if (hapd->p2p_beacon_ie)
1104 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
1105 #endif /* CONFIG_P2P */
1106 #ifdef CONFIG_FST
1107 if (hapd->iface->fst_ies)
1108 tail_len += wpabuf_len(hapd->iface->fst_ies);
1109 #endif /* CONFIG_FST */
1110 if (hapd->conf->vendor_elements)
1111 tail_len += wpabuf_len(hapd->conf->vendor_elements);
1112
1113 #ifdef CONFIG_IEEE80211AC
1114 if (hapd->conf->vendor_vht) {
1115 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
1116 2 + sizeof(struct ieee80211_vht_operation);
1117 }
1118 #endif /* CONFIG_IEEE80211AC */
1119
1120 #ifdef CONFIG_IEEE80211AX
1121 if (hapd->iconf->ieee80211ax) {
1122 tail_len += 3 + sizeof(struct ieee80211_he_capabilities) +
1123 3 + sizeof(struct ieee80211_he_operation);
1124 }
1125 #endif /* CONFIG_IEEE80211AX */
1126
1127 tail_len += hostapd_mbo_ie_len(hapd);
1128 tail_len += hostapd_eid_owe_trans_len(hapd);
1129
1130 tailpos = tail = os_malloc(tail_len);
1131 if (head == NULL || tail == NULL) {
1132 wpa_printf(MSG_ERROR, "Failed to set beacon data");
1133 os_free(head);
1134 os_free(tail);
1135 return -1;
1136 }
1137
1138 head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1139 WLAN_FC_STYPE_BEACON);
1140 head->duration = host_to_le16(0);
1141 os_memset(head->da, 0xff, ETH_ALEN);
1142
1143 os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
1144 os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
1145 head->u.beacon.beacon_int =
1146 host_to_le16(hapd->iconf->beacon_int);
1147
1148 /* hardware or low-level driver will setup seq_ctrl and timestamp */
1149 capab_info = hostapd_own_capab_info(hapd);
1150 head->u.beacon.capab_info = host_to_le16(capab_info);
1151 pos = &head->u.beacon.variable[0];
1152
1153 /* SSID */
1154 *pos++ = WLAN_EID_SSID;
1155 if (hapd->conf->ignore_broadcast_ssid == 2) {
1156 /* clear the data, but keep the correct length of the SSID */
1157 *pos++ = hapd->conf->ssid.ssid_len;
1158 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
1159 pos += hapd->conf->ssid.ssid_len;
1160 } else if (hapd->conf->ignore_broadcast_ssid) {
1161 *pos++ = 0; /* empty SSID */
1162 } else {
1163 *pos++ = hapd->conf->ssid.ssid_len;
1164 os_memcpy(pos, hapd->conf->ssid.ssid,
1165 hapd->conf->ssid.ssid_len);
1166 pos += hapd->conf->ssid.ssid_len;
1167 }
1168
1169 /* Supported rates */
1170 pos = hostapd_eid_supp_rates(hapd, pos);
1171
1172 /* DS Params */
1173 pos = hostapd_eid_ds_params(hapd, pos);
1174
1175 head_len = pos - (u8 *) head;
1176
1177 tailpos = hostapd_eid_country(hapd, tailpos,
1178 tail + BEACON_TAIL_BUF_SIZE - tailpos);
1179
1180 /* Power Constraint element */
1181 tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1182
1183 /* CSA IE */
1184 csa_pos = hostapd_eid_csa(hapd, tailpos);
1185 if (csa_pos != tailpos)
1186 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1187 tailpos = csa_pos;
1188
1189 /* ERP Information element */
1190 tailpos = hostapd_eid_erp_info(hapd, tailpos);
1191
1192 /* Extended supported rates */
1193 tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1194
1195 /* RSN, MDIE, WPA */
1196 tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
1197 tailpos);
1198
1199 tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1200 tail + BEACON_TAIL_BUF_SIZE -
1201 tailpos);
1202
1203 tailpos = hostapd_eid_bss_load(hapd, tailpos,
1204 tail + BEACON_TAIL_BUF_SIZE - tailpos);
1205
1206 /* eCSA IE */
1207 csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1208 if (csa_pos != tailpos)
1209 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1210 tailpos = csa_pos;
1211
1212 tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1213
1214 #ifdef CONFIG_IEEE80211N
1215 /* Secondary Channel Offset element */
1216 /* TODO: The standard doesn't specify a position for this element. */
1217 tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1218
1219 tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1220 tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1221 #endif /* CONFIG_IEEE80211N */
1222
1223 tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1224
1225 /*
1226 * TODO: Time Advertisement element should only be included in some
1227 * DTIM Beacon frames.
1228 */
1229 tailpos = hostapd_eid_time_adv(hapd, tailpos);
1230
1231 tailpos = hostapd_eid_interworking(hapd, tailpos);
1232 tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1233 tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1234
1235 #ifdef CONFIG_FST
1236 if (hapd->iface->fst_ies) {
1237 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1238 wpabuf_len(hapd->iface->fst_ies));
1239 tailpos += wpabuf_len(hapd->iface->fst_ies);
1240 }
1241 #endif /* CONFIG_FST */
1242
1243 #ifdef CONFIG_IEEE80211AC
1244 if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1245 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos, 0);
1246 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1247 tailpos = hostapd_eid_txpower_envelope(hapd, tailpos);
1248 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1249 }
1250 #endif /* CONFIG_IEEE80211AC */
1251
1252 tailpos = hostapd_eid_fils_indic(hapd, tailpos, 0);
1253
1254 #ifdef CONFIG_IEEE80211AX
1255 if (hapd->iconf->ieee80211ax) {
1256 tailpos = hostapd_eid_he_capab(hapd, tailpos);
1257 tailpos = hostapd_eid_he_operation(hapd, tailpos);
1258 }
1259 #endif /* CONFIG_IEEE80211AX */
1260
1261 #ifdef CONFIG_IEEE80211AC
1262 if (hapd->conf->vendor_vht)
1263 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1264 #endif /* CONFIG_IEEE80211AC */
1265
1266 /* Wi-Fi Alliance WMM */
1267 tailpos = hostapd_eid_wmm(hapd, tailpos);
1268
1269 #ifdef CONFIG_WPS
1270 if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1271 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1272 wpabuf_len(hapd->wps_beacon_ie));
1273 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1274 }
1275 #endif /* CONFIG_WPS */
1276
1277 #ifdef CONFIG_P2P
1278 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1279 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1280 wpabuf_len(hapd->p2p_beacon_ie));
1281 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1282 }
1283 #endif /* CONFIG_P2P */
1284 #ifdef CONFIG_P2P_MANAGER
1285 if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1286 P2P_MANAGE)
1287 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1288 #endif /* CONFIG_P2P_MANAGER */
1289
1290 #ifdef CONFIG_HS20
1291 tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1292 tailpos = hostapd_eid_osen(hapd, tailpos);
1293 #endif /* CONFIG_HS20 */
1294
1295 tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos);
1296 tailpos = hostapd_eid_owe_trans(hapd, tailpos,
1297 tail + tail_len - tailpos);
1298
1299 if (hapd->conf->vendor_elements) {
1300 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1301 wpabuf_len(hapd->conf->vendor_elements));
1302 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1303 }
1304
1305 tail_len = tailpos > tail ? tailpos - tail : 0;
1306
1307 resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1308 #endif /* NEED_AP_MLME */
1309
1310 os_memset(params, 0, sizeof(*params));
1311 params->head = (u8 *) head;
1312 params->head_len = head_len;
1313 params->tail = tail;
1314 params->tail_len = tail_len;
1315 params->proberesp = resp;
1316 params->proberesp_len = resp_len;
1317 params->dtim_period = hapd->conf->dtim_period;
1318 params->beacon_int = hapd->iconf->beacon_int;
1319 params->basic_rates = hapd->iface->basic_rates;
1320 params->beacon_rate = hapd->iconf->beacon_rate;
1321 params->rate_type = hapd->iconf->rate_type;
1322 params->ssid = hapd->conf->ssid.ssid;
1323 params->ssid_len = hapd->conf->ssid.ssid_len;
1324 if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1325 (WPA_PROTO_WPA | WPA_PROTO_RSN))
1326 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1327 hapd->conf->rsn_pairwise;
1328 else if (hapd->conf->wpa & WPA_PROTO_RSN)
1329 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1330 else if (hapd->conf->wpa & WPA_PROTO_WPA)
1331 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1332 params->group_cipher = hapd->conf->wpa_group;
1333 params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1334 params->auth_algs = hapd->conf->auth_algs;
1335 params->wpa_version = hapd->conf->wpa;
1336 params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1337 (hapd->conf->ieee802_1x &&
1338 (hapd->conf->default_wep_key_len ||
1339 hapd->conf->individual_wep_key_len));
1340 switch (hapd->conf->ignore_broadcast_ssid) {
1341 case 0:
1342 params->hide_ssid = NO_SSID_HIDING;
1343 break;
1344 case 1:
1345 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1346 break;
1347 case 2:
1348 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1349 break;
1350 }
1351 params->isolate = hapd->conf->isolate;
1352 params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1353 #ifdef NEED_AP_MLME
1354 params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1355 ERP_INFO_USE_PROTECTION);
1356 params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1357 hapd->iconf->preamble == SHORT_PREAMBLE;
1358 if (hapd->iface->current_mode &&
1359 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1360 params->short_slot_time =
1361 hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1362 else
1363 params->short_slot_time = -1;
1364 if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1365 params->ht_opmode = -1;
1366 else
1367 params->ht_opmode = hapd->iface->ht_op_mode;
1368 #endif /* NEED_AP_MLME */
1369 params->interworking = hapd->conf->interworking;
1370 if (hapd->conf->interworking &&
1371 !is_zero_ether_addr(hapd->conf->hessid))
1372 params->hessid = hapd->conf->hessid;
1373 params->access_network_type = hapd->conf->access_network_type;
1374 params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1375 #ifdef CONFIG_P2P
1376 params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1377 #endif /* CONFIG_P2P */
1378 #ifdef CONFIG_HS20
1379 params->disable_dgaf = hapd->conf->disable_dgaf;
1380 if (hapd->conf->osen) {
1381 params->privacy = 1;
1382 params->osen = 1;
1383 }
1384 #endif /* CONFIG_HS20 */
1385 params->multicast_to_unicast = hapd->conf->multicast_to_unicast;
1386 params->pbss = hapd->conf->pbss;
1387 return 0;
1388 }
1389
1390
ieee802_11_free_ap_params(struct wpa_driver_ap_params * params)1391 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1392 {
1393 os_free(params->tail);
1394 params->tail = NULL;
1395 os_free(params->head);
1396 params->head = NULL;
1397 os_free(params->proberesp);
1398 params->proberesp = NULL;
1399 }
1400
1401
ieee802_11_set_beacon(struct hostapd_data * hapd)1402 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1403 {
1404 struct wpa_driver_ap_params params;
1405 struct hostapd_freq_params freq;
1406 struct hostapd_iface *iface = hapd->iface;
1407 struct hostapd_config *iconf = iface->conf;
1408 struct wpabuf *beacon, *proberesp, *assocresp;
1409 int res, ret = -1;
1410
1411 if (hapd->csa_in_progress) {
1412 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1413 return -1;
1414 }
1415
1416 hapd->beacon_set_done = 1;
1417
1418 if (ieee802_11_build_ap_params(hapd, ¶ms) < 0)
1419 return -1;
1420
1421 if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1422 0)
1423 goto fail;
1424
1425 params.beacon_ies = beacon;
1426 params.proberesp_ies = proberesp;
1427 params.assocresp_ies = assocresp;
1428 params.reenable = hapd->reenable_beacon;
1429 hapd->reenable_beacon = 0;
1430
1431 if (iface->current_mode &&
1432 hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1433 iconf->channel, iconf->ieee80211n,
1434 iconf->ieee80211ac,
1435 iconf->secondary_channel,
1436 iconf->vht_oper_chwidth,
1437 iconf->vht_oper_centr_freq_seg0_idx,
1438 iconf->vht_oper_centr_freq_seg1_idx,
1439 iface->current_mode->vht_capab) == 0)
1440 params.freq = &freq;
1441
1442 res = hostapd_drv_set_ap(hapd, ¶ms);
1443 hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1444 if (res)
1445 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1446 else
1447 ret = 0;
1448 fail:
1449 ieee802_11_free_ap_params(¶ms);
1450 return ret;
1451 }
1452
1453
ieee802_11_set_beacons(struct hostapd_iface * iface)1454 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1455 {
1456 size_t i;
1457 int ret = 0;
1458
1459 for (i = 0; i < iface->num_bss; i++) {
1460 if (iface->bss[i]->started &&
1461 ieee802_11_set_beacon(iface->bss[i]) < 0)
1462 ret = -1;
1463 }
1464
1465 return ret;
1466 }
1467
1468
1469 /* only update beacons if started */
ieee802_11_update_beacons(struct hostapd_iface * iface)1470 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1471 {
1472 size_t i;
1473 int ret = 0;
1474
1475 for (i = 0; i < iface->num_bss; i++) {
1476 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1477 ieee802_11_set_beacon(iface->bss[i]) < 0)
1478 ret = -1;
1479 }
1480
1481 return ret;
1482 }
1483
1484 #endif /* CONFIG_NATIVE_WINDOWS */
1485