xref: /freebsd/contrib/wpa/src/ap/hostapd.c (revision 6b7b2d80ed4d728d3ffd12c422e57798c1b63a84)
1 /*
2  * hostapd / Initialization and configuration
3  * Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
4  *
5  * This software may be distributed under the terms of the BSD license.
6  * See README for more details.
7  */
8 
9 #include "utils/includes.h"
10 
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/wpa_ctrl.h"
15 #include "radius/radius_client.h"
16 #include "radius/radius_das.h"
17 #include "eap_server/tncs.h"
18 #include "eapol_auth/eapol_auth_sm.h"
19 #include "eapol_auth/eapol_auth_sm_i.h"
20 #include "fst/fst.h"
21 #include "hostapd.h"
22 #include "authsrv.h"
23 #include "sta_info.h"
24 #include "accounting.h"
25 #include "ap_list.h"
26 #include "beacon.h"
27 #include "iapp.h"
28 #include "ieee802_1x.h"
29 #include "ieee802_11_auth.h"
30 #include "vlan_init.h"
31 #include "wpa_auth.h"
32 #include "wps_hostapd.h"
33 #include "hw_features.h"
34 #include "wpa_auth_glue.h"
35 #include "ap_drv_ops.h"
36 #include "ap_config.h"
37 #include "p2p_hostapd.h"
38 #include "gas_serv.h"
39 #include "dfs.h"
40 #include "ieee802_11.h"
41 #include "bss_load.h"
42 #include "x_snoop.h"
43 #include "dhcp_snoop.h"
44 #include "ndisc_snoop.h"
45 
46 
47 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
48 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
49 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
50 static int setup_interface2(struct hostapd_iface *iface);
51 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx);
52 
53 
54 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
55 			       int (*cb)(struct hostapd_iface *iface,
56 					 void *ctx), void *ctx)
57 {
58 	size_t i;
59 	int ret;
60 
61 	for (i = 0; i < interfaces->count; i++) {
62 		ret = cb(interfaces->iface[i], ctx);
63 		if (ret)
64 			return ret;
65 	}
66 
67 	return 0;
68 }
69 
70 
71 static void hostapd_reload_bss(struct hostapd_data *hapd)
72 {
73 	struct hostapd_ssid *ssid;
74 
75 #ifndef CONFIG_NO_RADIUS
76 	radius_client_reconfig(hapd->radius, hapd->conf->radius);
77 #endif /* CONFIG_NO_RADIUS */
78 
79 	ssid = &hapd->conf->ssid;
80 	if (!ssid->wpa_psk_set && ssid->wpa_psk && !ssid->wpa_psk->next &&
81 	    ssid->wpa_passphrase_set && ssid->wpa_passphrase) {
82 		/*
83 		 * Force PSK to be derived again since SSID or passphrase may
84 		 * have changed.
85 		 */
86 		hostapd_config_clear_wpa_psk(&hapd->conf->ssid.wpa_psk);
87 	}
88 	if (hostapd_setup_wpa_psk(hapd->conf)) {
89 		wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
90 			   "after reloading configuration");
91 	}
92 
93 	if (hapd->conf->ieee802_1x || hapd->conf->wpa)
94 		hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
95 	else
96 		hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
97 
98 	if ((hapd->conf->wpa || hapd->conf->osen) && hapd->wpa_auth == NULL) {
99 		hostapd_setup_wpa(hapd);
100 		if (hapd->wpa_auth)
101 			wpa_init_keys(hapd->wpa_auth);
102 	} else if (hapd->conf->wpa) {
103 		const u8 *wpa_ie;
104 		size_t wpa_ie_len;
105 		hostapd_reconfig_wpa(hapd);
106 		wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
107 		if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
108 			wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
109 				   "the kernel driver.");
110 	} else if (hapd->wpa_auth) {
111 		wpa_deinit(hapd->wpa_auth);
112 		hapd->wpa_auth = NULL;
113 		hostapd_set_privacy(hapd, 0);
114 		hostapd_setup_encryption(hapd->conf->iface, hapd);
115 		hostapd_set_generic_elem(hapd, (u8 *) "", 0);
116 	}
117 
118 	ieee802_11_set_beacon(hapd);
119 	hostapd_update_wps(hapd);
120 
121 	if (hapd->conf->ssid.ssid_set &&
122 	    hostapd_set_ssid(hapd, hapd->conf->ssid.ssid,
123 			     hapd->conf->ssid.ssid_len)) {
124 		wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
125 		/* try to continue */
126 	}
127 	wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
128 }
129 
130 
131 static void hostapd_clear_old(struct hostapd_iface *iface)
132 {
133 	size_t j;
134 
135 	/*
136 	 * Deauthenticate all stations since the new configuration may not
137 	 * allow them to use the BSS anymore.
138 	 */
139 	for (j = 0; j < iface->num_bss; j++) {
140 		hostapd_flush_old_stations(iface->bss[j],
141 					   WLAN_REASON_PREV_AUTH_NOT_VALID);
142 		hostapd_broadcast_wep_clear(iface->bss[j]);
143 
144 #ifndef CONFIG_NO_RADIUS
145 		/* TODO: update dynamic data based on changed configuration
146 		 * items (e.g., open/close sockets, etc.) */
147 		radius_client_flush(iface->bss[j]->radius, 0);
148 #endif /* CONFIG_NO_RADIUS */
149 	}
150 }
151 
152 
153 int hostapd_reload_config(struct hostapd_iface *iface)
154 {
155 	struct hostapd_data *hapd = iface->bss[0];
156 	struct hostapd_config *newconf, *oldconf;
157 	size_t j;
158 
159 	if (iface->config_fname == NULL) {
160 		/* Only in-memory config in use - assume it has been updated */
161 		hostapd_clear_old(iface);
162 		for (j = 0; j < iface->num_bss; j++)
163 			hostapd_reload_bss(iface->bss[j]);
164 		return 0;
165 	}
166 
167 	if (iface->interfaces == NULL ||
168 	    iface->interfaces->config_read_cb == NULL)
169 		return -1;
170 	newconf = iface->interfaces->config_read_cb(iface->config_fname);
171 	if (newconf == NULL)
172 		return -1;
173 
174 	hostapd_clear_old(iface);
175 
176 	oldconf = hapd->iconf;
177 	iface->conf = newconf;
178 
179 	for (j = 0; j < iface->num_bss; j++) {
180 		hapd = iface->bss[j];
181 		hapd->iconf = newconf;
182 		hapd->iconf->channel = oldconf->channel;
183 		hapd->iconf->acs = oldconf->acs;
184 		hapd->iconf->secondary_channel = oldconf->secondary_channel;
185 		hapd->iconf->ieee80211n = oldconf->ieee80211n;
186 		hapd->iconf->ieee80211ac = oldconf->ieee80211ac;
187 		hapd->iconf->ht_capab = oldconf->ht_capab;
188 		hapd->iconf->vht_capab = oldconf->vht_capab;
189 		hapd->iconf->vht_oper_chwidth = oldconf->vht_oper_chwidth;
190 		hapd->iconf->vht_oper_centr_freq_seg0_idx =
191 			oldconf->vht_oper_centr_freq_seg0_idx;
192 		hapd->iconf->vht_oper_centr_freq_seg1_idx =
193 			oldconf->vht_oper_centr_freq_seg1_idx;
194 		hapd->conf = newconf->bss[j];
195 		hostapd_reload_bss(hapd);
196 	}
197 
198 	hostapd_config_free(oldconf);
199 
200 
201 	return 0;
202 }
203 
204 
205 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
206 					      char *ifname)
207 {
208 	int i;
209 
210 	for (i = 0; i < NUM_WEP_KEYS; i++) {
211 		if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
212 					0, NULL, 0, NULL, 0)) {
213 			wpa_printf(MSG_DEBUG, "Failed to clear default "
214 				   "encryption keys (ifname=%s keyidx=%d)",
215 				   ifname, i);
216 		}
217 	}
218 #ifdef CONFIG_IEEE80211W
219 	if (hapd->conf->ieee80211w) {
220 		for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
221 			if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
222 						NULL, i, 0, NULL,
223 						0, NULL, 0)) {
224 				wpa_printf(MSG_DEBUG, "Failed to clear "
225 					   "default mgmt encryption keys "
226 					   "(ifname=%s keyidx=%d)", ifname, i);
227 			}
228 		}
229 	}
230 #endif /* CONFIG_IEEE80211W */
231 }
232 
233 
234 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
235 {
236 	hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
237 	return 0;
238 }
239 
240 
241 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
242 {
243 	int errors = 0, idx;
244 	struct hostapd_ssid *ssid = &hapd->conf->ssid;
245 
246 	idx = ssid->wep.idx;
247 	if (ssid->wep.default_len &&
248 	    hostapd_drv_set_key(hapd->conf->iface,
249 				hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
250 				1, NULL, 0, ssid->wep.key[idx],
251 				ssid->wep.len[idx])) {
252 		wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
253 		errors++;
254 	}
255 
256 	return errors;
257 }
258 
259 
260 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
261 {
262 	os_free(hapd->probereq_cb);
263 	hapd->probereq_cb = NULL;
264 	hapd->num_probereq_cb = 0;
265 
266 #ifdef CONFIG_P2P
267 	wpabuf_free(hapd->p2p_beacon_ie);
268 	hapd->p2p_beacon_ie = NULL;
269 	wpabuf_free(hapd->p2p_probe_resp_ie);
270 	hapd->p2p_probe_resp_ie = NULL;
271 #endif /* CONFIG_P2P */
272 
273 	if (!hapd->started) {
274 		wpa_printf(MSG_ERROR, "%s: Interface %s wasn't started",
275 			   __func__, hapd->conf->iface);
276 		return;
277 	}
278 	hapd->started = 0;
279 
280 	wpa_printf(MSG_DEBUG, "%s(%s)", __func__, hapd->conf->iface);
281 	iapp_deinit(hapd->iapp);
282 	hapd->iapp = NULL;
283 	accounting_deinit(hapd);
284 	hostapd_deinit_wpa(hapd);
285 	vlan_deinit(hapd);
286 	hostapd_acl_deinit(hapd);
287 #ifndef CONFIG_NO_RADIUS
288 	radius_client_deinit(hapd->radius);
289 	hapd->radius = NULL;
290 	radius_das_deinit(hapd->radius_das);
291 	hapd->radius_das = NULL;
292 #endif /* CONFIG_NO_RADIUS */
293 
294 	hostapd_deinit_wps(hapd);
295 
296 	authsrv_deinit(hapd);
297 
298 	if (hapd->interface_added) {
299 		hapd->interface_added = 0;
300 		if (hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
301 			wpa_printf(MSG_WARNING,
302 				   "Failed to remove BSS interface %s",
303 				   hapd->conf->iface);
304 			hapd->interface_added = 1;
305 		} else {
306 			/*
307 			 * Since this was a dynamically added interface, the
308 			 * driver wrapper may have removed its internal instance
309 			 * and hapd->drv_priv is not valid anymore.
310 			 */
311 			hapd->drv_priv = NULL;
312 		}
313 	}
314 
315 	wpabuf_free(hapd->time_adv);
316 
317 #ifdef CONFIG_INTERWORKING
318 	gas_serv_deinit(hapd);
319 #endif /* CONFIG_INTERWORKING */
320 
321 	bss_load_update_deinit(hapd);
322 	ndisc_snoop_deinit(hapd);
323 	dhcp_snoop_deinit(hapd);
324 	x_snoop_deinit(hapd);
325 
326 #ifdef CONFIG_SQLITE
327 	bin_clear_free(hapd->tmp_eap_user.identity,
328 		       hapd->tmp_eap_user.identity_len);
329 	bin_clear_free(hapd->tmp_eap_user.password,
330 		       hapd->tmp_eap_user.password_len);
331 #endif /* CONFIG_SQLITE */
332 
333 #ifdef CONFIG_MESH
334 	wpabuf_free(hapd->mesh_pending_auth);
335 	hapd->mesh_pending_auth = NULL;
336 #endif /* CONFIG_MESH */
337 }
338 
339 
340 /**
341  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
342  * @hapd: Pointer to BSS data
343  *
344  * This function is used to free all per-BSS data structures and resources.
345  * Most of the modules that are initialized in hostapd_setup_bss() are
346  * deinitialized here.
347  */
348 static void hostapd_cleanup(struct hostapd_data *hapd)
349 {
350 	wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s))", __func__, hapd,
351 		   hapd->conf->iface);
352 	if (hapd->iface->interfaces &&
353 	    hapd->iface->interfaces->ctrl_iface_deinit)
354 		hapd->iface->interfaces->ctrl_iface_deinit(hapd);
355 	hostapd_free_hapd_data(hapd);
356 }
357 
358 
359 static void sta_track_deinit(struct hostapd_iface *iface)
360 {
361 	struct hostapd_sta_info *info;
362 
363 	if (!iface->num_sta_seen)
364 		return;
365 
366 	while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
367 				     list))) {
368 		dl_list_del(&info->list);
369 		iface->num_sta_seen--;
370 		os_free(info);
371 	}
372 }
373 
374 
375 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
376 {
377 	wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
378 #ifdef CONFIG_IEEE80211N
379 #ifdef NEED_AP_MLME
380 	hostapd_stop_setup_timers(iface);
381 #endif /* NEED_AP_MLME */
382 #endif /* CONFIG_IEEE80211N */
383 	hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
384 	iface->hw_features = NULL;
385 	os_free(iface->current_rates);
386 	iface->current_rates = NULL;
387 	os_free(iface->basic_rates);
388 	iface->basic_rates = NULL;
389 	ap_list_deinit(iface);
390 	sta_track_deinit(iface);
391 }
392 
393 
394 /**
395  * hostapd_cleanup_iface - Complete per-interface cleanup
396  * @iface: Pointer to interface data
397  *
398  * This function is called after per-BSS data structures are deinitialized
399  * with hostapd_cleanup().
400  */
401 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
402 {
403 	wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
404 	eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
405 
406 	hostapd_cleanup_iface_partial(iface);
407 	hostapd_config_free(iface->conf);
408 	iface->conf = NULL;
409 
410 	os_free(iface->config_fname);
411 	os_free(iface->bss);
412 	wpa_printf(MSG_DEBUG, "%s: free iface=%p", __func__, iface);
413 	os_free(iface);
414 }
415 
416 
417 static void hostapd_clear_wep(struct hostapd_data *hapd)
418 {
419 	if (hapd->drv_priv && !hapd->iface->driver_ap_teardown) {
420 		hostapd_set_privacy(hapd, 0);
421 		hostapd_broadcast_wep_clear(hapd);
422 	}
423 }
424 
425 
426 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
427 {
428 	int i;
429 
430 	hostapd_broadcast_wep_set(hapd);
431 
432 	if (hapd->conf->ssid.wep.default_len) {
433 		hostapd_set_privacy(hapd, 1);
434 		return 0;
435 	}
436 
437 	/*
438 	 * When IEEE 802.1X is not enabled, the driver may need to know how to
439 	 * set authentication algorithms for static WEP.
440 	 */
441 	hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
442 
443 	for (i = 0; i < 4; i++) {
444 		if (hapd->conf->ssid.wep.key[i] &&
445 		    hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
446 					i == hapd->conf->ssid.wep.idx, NULL, 0,
447 					hapd->conf->ssid.wep.key[i],
448 					hapd->conf->ssid.wep.len[i])) {
449 			wpa_printf(MSG_WARNING, "Could not set WEP "
450 				   "encryption.");
451 			return -1;
452 		}
453 		if (hapd->conf->ssid.wep.key[i] &&
454 		    i == hapd->conf->ssid.wep.idx)
455 			hostapd_set_privacy(hapd, 1);
456 	}
457 
458 	return 0;
459 }
460 
461 
462 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
463 {
464 	int ret = 0;
465 	u8 addr[ETH_ALEN];
466 
467 	if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
468 		return 0;
469 
470 	if (!hapd->iface->driver_ap_teardown) {
471 		wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
472 			"Flushing old station entries");
473 
474 		if (hostapd_flush(hapd)) {
475 			wpa_msg(hapd->msg_ctx, MSG_WARNING,
476 				"Could not connect to kernel driver");
477 			ret = -1;
478 		}
479 	}
480 	wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
481 	os_memset(addr, 0xff, ETH_ALEN);
482 	hostapd_drv_sta_deauth(hapd, addr, reason);
483 	hostapd_free_stas(hapd);
484 
485 	return ret;
486 }
487 
488 
489 static void hostapd_bss_deinit_no_free(struct hostapd_data *hapd)
490 {
491 	hostapd_free_stas(hapd);
492 	hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
493 	hostapd_clear_wep(hapd);
494 }
495 
496 
497 /**
498  * hostapd_validate_bssid_configuration - Validate BSSID configuration
499  * @iface: Pointer to interface data
500  * Returns: 0 on success, -1 on failure
501  *
502  * This function is used to validate that the configured BSSIDs are valid.
503  */
504 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
505 {
506 	u8 mask[ETH_ALEN] = { 0 };
507 	struct hostapd_data *hapd = iface->bss[0];
508 	unsigned int i = iface->conf->num_bss, bits = 0, j;
509 	int auto_addr = 0;
510 
511 	if (hostapd_drv_none(hapd))
512 		return 0;
513 
514 	/* Generate BSSID mask that is large enough to cover the BSSIDs. */
515 
516 	/* Determine the bits necessary to cover the number of BSSIDs. */
517 	for (i--; i; i >>= 1)
518 		bits++;
519 
520 	/* Determine the bits necessary to any configured BSSIDs,
521 	   if they are higher than the number of BSSIDs. */
522 	for (j = 0; j < iface->conf->num_bss; j++) {
523 		if (hostapd_mac_comp_empty(iface->conf->bss[j]->bssid) == 0) {
524 			if (j)
525 				auto_addr++;
526 			continue;
527 		}
528 
529 		for (i = 0; i < ETH_ALEN; i++) {
530 			mask[i] |=
531 				iface->conf->bss[j]->bssid[i] ^
532 				hapd->own_addr[i];
533 		}
534 	}
535 
536 	if (!auto_addr)
537 		goto skip_mask_ext;
538 
539 	for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
540 		;
541 	j = 0;
542 	if (i < ETH_ALEN) {
543 		j = (5 - i) * 8;
544 
545 		while (mask[i] != 0) {
546 			mask[i] >>= 1;
547 			j++;
548 		}
549 	}
550 
551 	if (bits < j)
552 		bits = j;
553 
554 	if (bits > 40) {
555 		wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
556 			   bits);
557 		return -1;
558 	}
559 
560 	os_memset(mask, 0xff, ETH_ALEN);
561 	j = bits / 8;
562 	for (i = 5; i > 5 - j; i--)
563 		mask[i] = 0;
564 	j = bits % 8;
565 	while (j--)
566 		mask[i] <<= 1;
567 
568 skip_mask_ext:
569 	wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
570 		   (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
571 
572 	if (!auto_addr)
573 		return 0;
574 
575 	for (i = 0; i < ETH_ALEN; i++) {
576 		if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
577 			wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
578 				   " for start address " MACSTR ".",
579 				   MAC2STR(mask), MAC2STR(hapd->own_addr));
580 			wpa_printf(MSG_ERROR, "Start address must be the "
581 				   "first address in the block (i.e., addr "
582 				   "AND mask == addr).");
583 			return -1;
584 		}
585 	}
586 
587 	return 0;
588 }
589 
590 
591 static int mac_in_conf(struct hostapd_config *conf, const void *a)
592 {
593 	size_t i;
594 
595 	for (i = 0; i < conf->num_bss; i++) {
596 		if (hostapd_mac_comp(conf->bss[i]->bssid, a) == 0) {
597 			return 1;
598 		}
599 	}
600 
601 	return 0;
602 }
603 
604 
605 #ifndef CONFIG_NO_RADIUS
606 
607 static int hostapd_das_nas_mismatch(struct hostapd_data *hapd,
608 				    struct radius_das_attrs *attr)
609 {
610 	if (attr->nas_identifier &&
611 	    (!hapd->conf->nas_identifier ||
612 	     os_strlen(hapd->conf->nas_identifier) !=
613 	     attr->nas_identifier_len ||
614 	     os_memcmp(hapd->conf->nas_identifier, attr->nas_identifier,
615 		       attr->nas_identifier_len) != 0)) {
616 		wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-Identifier mismatch");
617 		return 1;
618 	}
619 
620 	if (attr->nas_ip_addr &&
621 	    (hapd->conf->own_ip_addr.af != AF_INET ||
622 	     os_memcmp(&hapd->conf->own_ip_addr.u.v4, attr->nas_ip_addr, 4) !=
623 	     0)) {
624 		wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IP-Address mismatch");
625 		return 1;
626 	}
627 
628 #ifdef CONFIG_IPV6
629 	if (attr->nas_ipv6_addr &&
630 	    (hapd->conf->own_ip_addr.af != AF_INET6 ||
631 	     os_memcmp(&hapd->conf->own_ip_addr.u.v6, attr->nas_ipv6_addr, 16)
632 	     != 0)) {
633 		wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IPv6-Address mismatch");
634 		return 1;
635 	}
636 #endif /* CONFIG_IPV6 */
637 
638 	return 0;
639 }
640 
641 
642 static struct sta_info * hostapd_das_find_sta(struct hostapd_data *hapd,
643 					      struct radius_das_attrs *attr,
644 					      int *multi)
645 {
646 	struct sta_info *selected, *sta;
647 	char buf[128];
648 	int num_attr = 0;
649 	int count;
650 
651 	*multi = 0;
652 
653 	for (sta = hapd->sta_list; sta; sta = sta->next)
654 		sta->radius_das_match = 1;
655 
656 	if (attr->sta_addr) {
657 		num_attr++;
658 		sta = ap_get_sta(hapd, attr->sta_addr);
659 		if (!sta) {
660 			wpa_printf(MSG_DEBUG,
661 				   "RADIUS DAS: No Calling-Station-Id match");
662 			return NULL;
663 		}
664 
665 		selected = sta;
666 		for (sta = hapd->sta_list; sta; sta = sta->next) {
667 			if (sta != selected)
668 				sta->radius_das_match = 0;
669 		}
670 		wpa_printf(MSG_DEBUG, "RADIUS DAS: Calling-Station-Id match");
671 	}
672 
673 	if (attr->acct_session_id) {
674 		num_attr++;
675 		if (attr->acct_session_id_len != 17) {
676 			wpa_printf(MSG_DEBUG,
677 				   "RADIUS DAS: Acct-Session-Id cannot match");
678 			return NULL;
679 		}
680 		count = 0;
681 
682 		for (sta = hapd->sta_list; sta; sta = sta->next) {
683 			if (!sta->radius_das_match)
684 				continue;
685 			os_snprintf(buf, sizeof(buf), "%08X-%08X",
686 				    sta->acct_session_id_hi,
687 				    sta->acct_session_id_lo);
688 			if (os_memcmp(attr->acct_session_id, buf, 17) != 0)
689 				sta->radius_das_match = 0;
690 			else
691 				count++;
692 		}
693 
694 		if (count == 0) {
695 			wpa_printf(MSG_DEBUG,
696 				   "RADIUS DAS: No matches remaining after Acct-Session-Id check");
697 			return NULL;
698 		}
699 		wpa_printf(MSG_DEBUG, "RADIUS DAS: Acct-Session-Id match");
700 	}
701 
702 	if (attr->acct_multi_session_id) {
703 		num_attr++;
704 		if (attr->acct_multi_session_id_len != 17) {
705 			wpa_printf(MSG_DEBUG,
706 				   "RADIUS DAS: Acct-Multi-Session-Id cannot match");
707 			return NULL;
708 		}
709 		count = 0;
710 
711 		for (sta = hapd->sta_list; sta; sta = sta->next) {
712 			if (!sta->radius_das_match)
713 				continue;
714 			if (!sta->eapol_sm ||
715 			    !sta->eapol_sm->acct_multi_session_id_hi) {
716 				sta->radius_das_match = 0;
717 				continue;
718 			}
719 			os_snprintf(buf, sizeof(buf), "%08X+%08X",
720 				    sta->eapol_sm->acct_multi_session_id_hi,
721 				    sta->eapol_sm->acct_multi_session_id_lo);
722 			if (os_memcmp(attr->acct_multi_session_id, buf, 17) !=
723 			    0)
724 				sta->radius_das_match = 0;
725 			else
726 				count++;
727 		}
728 
729 		if (count == 0) {
730 			wpa_printf(MSG_DEBUG,
731 				   "RADIUS DAS: No matches remaining after Acct-Multi-Session-Id check");
732 			return NULL;
733 		}
734 		wpa_printf(MSG_DEBUG,
735 			   "RADIUS DAS: Acct-Multi-Session-Id match");
736 	}
737 
738 	if (attr->cui) {
739 		num_attr++;
740 		count = 0;
741 
742 		for (sta = hapd->sta_list; sta; sta = sta->next) {
743 			struct wpabuf *cui;
744 
745 			if (!sta->radius_das_match)
746 				continue;
747 			cui = ieee802_1x_get_radius_cui(sta->eapol_sm);
748 			if (!cui || wpabuf_len(cui) != attr->cui_len ||
749 			    os_memcmp(wpabuf_head(cui), attr->cui,
750 				      attr->cui_len) != 0)
751 				sta->radius_das_match = 0;
752 			else
753 				count++;
754 		}
755 
756 		if (count == 0) {
757 			wpa_printf(MSG_DEBUG,
758 				   "RADIUS DAS: No matches remaining after Chargeable-User-Identity check");
759 			return NULL;
760 		}
761 		wpa_printf(MSG_DEBUG,
762 			   "RADIUS DAS: Chargeable-User-Identity match");
763 	}
764 
765 	if (attr->user_name) {
766 		num_attr++;
767 		count = 0;
768 
769 		for (sta = hapd->sta_list; sta; sta = sta->next) {
770 			u8 *identity;
771 			size_t identity_len;
772 
773 			if (!sta->radius_das_match)
774 				continue;
775 			identity = ieee802_1x_get_identity(sta->eapol_sm,
776 							   &identity_len);
777 			if (!identity ||
778 			    identity_len != attr->user_name_len ||
779 			    os_memcmp(identity, attr->user_name, identity_len)
780 			    != 0)
781 				sta->radius_das_match = 0;
782 			else
783 				count++;
784 		}
785 
786 		if (count == 0) {
787 			wpa_printf(MSG_DEBUG,
788 				   "RADIUS DAS: No matches remaining after User-Name check");
789 			return NULL;
790 		}
791 		wpa_printf(MSG_DEBUG,
792 			   "RADIUS DAS: User-Name match");
793 	}
794 
795 	if (num_attr == 0) {
796 		/*
797 		 * In theory, we could match all current associations, but it
798 		 * seems safer to just reject requests that do not include any
799 		 * session identification attributes.
800 		 */
801 		wpa_printf(MSG_DEBUG,
802 			   "RADIUS DAS: No session identification attributes included");
803 		return NULL;
804 	}
805 
806 	selected = NULL;
807 	for (sta = hapd->sta_list; sta; sta = sta->next) {
808 		if (sta->radius_das_match) {
809 			if (selected) {
810 				*multi = 1;
811 				return NULL;
812 			}
813 			selected = sta;
814 		}
815 	}
816 
817 	return selected;
818 }
819 
820 
821 static int hostapd_das_disconnect_pmksa(struct hostapd_data *hapd,
822 					struct radius_das_attrs *attr)
823 {
824 	if (!hapd->wpa_auth)
825 		return -1;
826 	return wpa_auth_radius_das_disconnect_pmksa(hapd->wpa_auth, attr);
827 }
828 
829 
830 static enum radius_das_res
831 hostapd_das_disconnect(void *ctx, struct radius_das_attrs *attr)
832 {
833 	struct hostapd_data *hapd = ctx;
834 	struct sta_info *sta;
835 	int multi;
836 
837 	if (hostapd_das_nas_mismatch(hapd, attr))
838 		return RADIUS_DAS_NAS_MISMATCH;
839 
840 	sta = hostapd_das_find_sta(hapd, attr, &multi);
841 	if (sta == NULL) {
842 		if (multi) {
843 			wpa_printf(MSG_DEBUG,
844 				   "RADIUS DAS: Multiple sessions match - not supported");
845 			return RADIUS_DAS_MULTI_SESSION_MATCH;
846 		}
847 		if (hostapd_das_disconnect_pmksa(hapd, attr) == 0) {
848 			wpa_printf(MSG_DEBUG,
849 				   "RADIUS DAS: PMKSA cache entry matched");
850 			return RADIUS_DAS_SUCCESS;
851 		}
852 		wpa_printf(MSG_DEBUG, "RADIUS DAS: No matching session found");
853 		return RADIUS_DAS_SESSION_NOT_FOUND;
854 	}
855 
856 	wpa_printf(MSG_DEBUG, "RADIUS DAS: Found a matching session " MACSTR
857 		   " - disconnecting", MAC2STR(sta->addr));
858 	wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
859 
860 	hostapd_drv_sta_deauth(hapd, sta->addr,
861 			       WLAN_REASON_PREV_AUTH_NOT_VALID);
862 	ap_sta_deauthenticate(hapd, sta, WLAN_REASON_PREV_AUTH_NOT_VALID);
863 
864 	return RADIUS_DAS_SUCCESS;
865 }
866 
867 #endif /* CONFIG_NO_RADIUS */
868 
869 
870 /**
871  * hostapd_setup_bss - Per-BSS setup (initialization)
872  * @hapd: Pointer to BSS data
873  * @first: Whether this BSS is the first BSS of an interface; -1 = not first,
874  *	but interface may exist
875  *
876  * This function is used to initialize all per-BSS data structures and
877  * resources. This gets called in a loop for each BSS when an interface is
878  * initialized. Most of the modules that are initialized here will be
879  * deinitialized in hostapd_cleanup().
880  */
881 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
882 {
883 	struct hostapd_bss_config *conf = hapd->conf;
884 	u8 ssid[SSID_MAX_LEN + 1];
885 	int ssid_len, set_ssid;
886 	char force_ifname[IFNAMSIZ];
887 	u8 if_addr[ETH_ALEN];
888 	int flush_old_stations = 1;
889 
890 	wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s), first=%d)",
891 		   __func__, hapd, conf->iface, first);
892 
893 #ifdef EAP_SERVER_TNC
894 	if (conf->tnc && tncs_global_init() < 0) {
895 		wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
896 		return -1;
897 	}
898 #endif /* EAP_SERVER_TNC */
899 
900 	if (hapd->started) {
901 		wpa_printf(MSG_ERROR, "%s: Interface %s was already started",
902 			   __func__, conf->iface);
903 		return -1;
904 	}
905 	hapd->started = 1;
906 
907 	if (!first || first == -1) {
908 		if (hostapd_mac_comp_empty(conf->bssid) == 0) {
909 			/* Allocate the next available BSSID. */
910 			do {
911 				inc_byte_array(hapd->own_addr, ETH_ALEN);
912 			} while (mac_in_conf(hapd->iconf, hapd->own_addr));
913 		} else {
914 			/* Allocate the configured BSSID. */
915 			os_memcpy(hapd->own_addr, conf->bssid, ETH_ALEN);
916 
917 			if (hostapd_mac_comp(hapd->own_addr,
918 					     hapd->iface->bss[0]->own_addr) ==
919 			    0) {
920 				wpa_printf(MSG_ERROR, "BSS '%s' may not have "
921 					   "BSSID set to the MAC address of "
922 					   "the radio", conf->iface);
923 				return -1;
924 			}
925 		}
926 
927 		hapd->interface_added = 1;
928 		if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
929 				   conf->iface, hapd->own_addr, hapd,
930 				   &hapd->drv_priv, force_ifname, if_addr,
931 				   conf->bridge[0] ? conf->bridge : NULL,
932 				   first == -1)) {
933 			wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
934 				   MACSTR ")", MAC2STR(hapd->own_addr));
935 			hapd->interface_added = 0;
936 			return -1;
937 		}
938 	}
939 
940 	if (conf->wmm_enabled < 0)
941 		conf->wmm_enabled = hapd->iconf->ieee80211n;
942 
943 #ifdef CONFIG_MESH
944 	if (hapd->iface->mconf == NULL)
945 		flush_old_stations = 0;
946 #endif /* CONFIG_MESH */
947 
948 	if (flush_old_stations)
949 		hostapd_flush_old_stations(hapd,
950 					   WLAN_REASON_PREV_AUTH_NOT_VALID);
951 	hostapd_set_privacy(hapd, 0);
952 
953 	hostapd_broadcast_wep_clear(hapd);
954 	if (hostapd_setup_encryption(conf->iface, hapd))
955 		return -1;
956 
957 	/*
958 	 * Fetch the SSID from the system and use it or,
959 	 * if one was specified in the config file, verify they
960 	 * match.
961 	 */
962 	ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
963 	if (ssid_len < 0) {
964 		wpa_printf(MSG_ERROR, "Could not read SSID from system");
965 		return -1;
966 	}
967 	if (conf->ssid.ssid_set) {
968 		/*
969 		 * If SSID is specified in the config file and it differs
970 		 * from what is being used then force installation of the
971 		 * new SSID.
972 		 */
973 		set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
974 			    os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
975 	} else {
976 		/*
977 		 * No SSID in the config file; just use the one we got
978 		 * from the system.
979 		 */
980 		set_ssid = 0;
981 		conf->ssid.ssid_len = ssid_len;
982 		os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
983 	}
984 
985 	if (!hostapd_drv_none(hapd)) {
986 		wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
987 			   " and ssid \"%s\"",
988 			   conf->iface, MAC2STR(hapd->own_addr),
989 			   wpa_ssid_txt(conf->ssid.ssid, conf->ssid.ssid_len));
990 	}
991 
992 	if (hostapd_setup_wpa_psk(conf)) {
993 		wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
994 		return -1;
995 	}
996 
997 	/* Set SSID for the kernel driver (to be used in beacon and probe
998 	 * response frames) */
999 	if (set_ssid && hostapd_set_ssid(hapd, conf->ssid.ssid,
1000 					 conf->ssid.ssid_len)) {
1001 		wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
1002 		return -1;
1003 	}
1004 
1005 	if (wpa_debug_level <= MSG_MSGDUMP)
1006 		conf->radius->msg_dumps = 1;
1007 #ifndef CONFIG_NO_RADIUS
1008 	hapd->radius = radius_client_init(hapd, conf->radius);
1009 	if (hapd->radius == NULL) {
1010 		wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
1011 		return -1;
1012 	}
1013 
1014 	if (conf->radius_das_port) {
1015 		struct radius_das_conf das_conf;
1016 		os_memset(&das_conf, 0, sizeof(das_conf));
1017 		das_conf.port = conf->radius_das_port;
1018 		das_conf.shared_secret = conf->radius_das_shared_secret;
1019 		das_conf.shared_secret_len =
1020 			conf->radius_das_shared_secret_len;
1021 		das_conf.client_addr = &conf->radius_das_client_addr;
1022 		das_conf.time_window = conf->radius_das_time_window;
1023 		das_conf.require_event_timestamp =
1024 			conf->radius_das_require_event_timestamp;
1025 		das_conf.ctx = hapd;
1026 		das_conf.disconnect = hostapd_das_disconnect;
1027 		hapd->radius_das = radius_das_init(&das_conf);
1028 		if (hapd->radius_das == NULL) {
1029 			wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
1030 				   "failed.");
1031 			return -1;
1032 		}
1033 	}
1034 #endif /* CONFIG_NO_RADIUS */
1035 
1036 	if (hostapd_acl_init(hapd)) {
1037 		wpa_printf(MSG_ERROR, "ACL initialization failed.");
1038 		return -1;
1039 	}
1040 	if (hostapd_init_wps(hapd, conf))
1041 		return -1;
1042 
1043 	if (authsrv_init(hapd) < 0)
1044 		return -1;
1045 
1046 	if (ieee802_1x_init(hapd)) {
1047 		wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
1048 		return -1;
1049 	}
1050 
1051 	if ((conf->wpa || conf->osen) && hostapd_setup_wpa(hapd))
1052 		return -1;
1053 
1054 	if (accounting_init(hapd)) {
1055 		wpa_printf(MSG_ERROR, "Accounting initialization failed.");
1056 		return -1;
1057 	}
1058 
1059 	if (conf->ieee802_11f &&
1060 	    (hapd->iapp = iapp_init(hapd, conf->iapp_iface)) == NULL) {
1061 		wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
1062 			   "failed.");
1063 		return -1;
1064 	}
1065 
1066 #ifdef CONFIG_INTERWORKING
1067 	if (gas_serv_init(hapd)) {
1068 		wpa_printf(MSG_ERROR, "GAS server initialization failed");
1069 		return -1;
1070 	}
1071 
1072 	if (conf->qos_map_set_len &&
1073 	    hostapd_drv_set_qos_map(hapd, conf->qos_map_set,
1074 				    conf->qos_map_set_len)) {
1075 		wpa_printf(MSG_ERROR, "Failed to initialize QoS Map");
1076 		return -1;
1077 	}
1078 #endif /* CONFIG_INTERWORKING */
1079 
1080 	if (conf->bss_load_update_period && bss_load_update_init(hapd)) {
1081 		wpa_printf(MSG_ERROR, "BSS Load initialization failed");
1082 		return -1;
1083 	}
1084 
1085 	if (conf->proxy_arp) {
1086 		if (x_snoop_init(hapd)) {
1087 			wpa_printf(MSG_ERROR,
1088 				   "Generic snooping infrastructure initialization failed");
1089 			return -1;
1090 		}
1091 
1092 		if (dhcp_snoop_init(hapd)) {
1093 			wpa_printf(MSG_ERROR,
1094 				   "DHCP snooping initialization failed");
1095 			return -1;
1096 		}
1097 
1098 		if (ndisc_snoop_init(hapd)) {
1099 			wpa_printf(MSG_ERROR,
1100 				   "Neighbor Discovery snooping initialization failed");
1101 			return -1;
1102 		}
1103 	}
1104 
1105 	if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
1106 		wpa_printf(MSG_ERROR, "VLAN initialization failed.");
1107 		return -1;
1108 	}
1109 
1110 	if (!conf->start_disabled && ieee802_11_set_beacon(hapd) < 0)
1111 		return -1;
1112 
1113 	if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
1114 		return -1;
1115 
1116 	if (hapd->driver && hapd->driver->set_operstate)
1117 		hapd->driver->set_operstate(hapd->drv_priv, 1);
1118 
1119 	return 0;
1120 }
1121 
1122 
1123 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
1124 {
1125 	struct hostapd_data *hapd = iface->bss[0];
1126 	int i;
1127 	struct hostapd_tx_queue_params *p;
1128 
1129 #ifdef CONFIG_MESH
1130 	if (iface->mconf == NULL)
1131 		return;
1132 #endif /* CONFIG_MESH */
1133 
1134 	for (i = 0; i < NUM_TX_QUEUES; i++) {
1135 		p = &iface->conf->tx_queue[i];
1136 
1137 		if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
1138 						p->cwmax, p->burst)) {
1139 			wpa_printf(MSG_DEBUG, "Failed to set TX queue "
1140 				   "parameters for queue %d.", i);
1141 			/* Continue anyway */
1142 		}
1143 	}
1144 }
1145 
1146 
1147 static int hostapd_set_acl_list(struct hostapd_data *hapd,
1148 				struct mac_acl_entry *mac_acl,
1149 				int n_entries, u8 accept_acl)
1150 {
1151 	struct hostapd_acl_params *acl_params;
1152 	int i, err;
1153 
1154 	acl_params = os_zalloc(sizeof(*acl_params) +
1155 			       (n_entries * sizeof(acl_params->mac_acl[0])));
1156 	if (!acl_params)
1157 		return -ENOMEM;
1158 
1159 	for (i = 0; i < n_entries; i++)
1160 		os_memcpy(acl_params->mac_acl[i].addr, mac_acl[i].addr,
1161 			  ETH_ALEN);
1162 
1163 	acl_params->acl_policy = accept_acl;
1164 	acl_params->num_mac_acl = n_entries;
1165 
1166 	err = hostapd_drv_set_acl(hapd, acl_params);
1167 
1168 	os_free(acl_params);
1169 
1170 	return err;
1171 }
1172 
1173 
1174 static void hostapd_set_acl(struct hostapd_data *hapd)
1175 {
1176 	struct hostapd_config *conf = hapd->iconf;
1177 	int err;
1178 	u8 accept_acl;
1179 
1180 	if (hapd->iface->drv_max_acl_mac_addrs == 0)
1181 		return;
1182 
1183 	if (conf->bss[0]->macaddr_acl == DENY_UNLESS_ACCEPTED) {
1184 		accept_acl = 1;
1185 		err = hostapd_set_acl_list(hapd, conf->bss[0]->accept_mac,
1186 					   conf->bss[0]->num_accept_mac,
1187 					   accept_acl);
1188 		if (err) {
1189 			wpa_printf(MSG_DEBUG, "Failed to set accept acl");
1190 			return;
1191 		}
1192 	} else if (conf->bss[0]->macaddr_acl == ACCEPT_UNLESS_DENIED) {
1193 		accept_acl = 0;
1194 		err = hostapd_set_acl_list(hapd, conf->bss[0]->deny_mac,
1195 					   conf->bss[0]->num_deny_mac,
1196 					   accept_acl);
1197 		if (err) {
1198 			wpa_printf(MSG_DEBUG, "Failed to set deny acl");
1199 			return;
1200 		}
1201 	}
1202 }
1203 
1204 
1205 static int start_ctrl_iface_bss(struct hostapd_data *hapd)
1206 {
1207 	if (!hapd->iface->interfaces ||
1208 	    !hapd->iface->interfaces->ctrl_iface_init)
1209 		return 0;
1210 
1211 	if (hapd->iface->interfaces->ctrl_iface_init(hapd)) {
1212 		wpa_printf(MSG_ERROR,
1213 			   "Failed to setup control interface for %s",
1214 			   hapd->conf->iface);
1215 		return -1;
1216 	}
1217 
1218 	return 0;
1219 }
1220 
1221 
1222 static int start_ctrl_iface(struct hostapd_iface *iface)
1223 {
1224 	size_t i;
1225 
1226 	if (!iface->interfaces || !iface->interfaces->ctrl_iface_init)
1227 		return 0;
1228 
1229 	for (i = 0; i < iface->num_bss; i++) {
1230 		struct hostapd_data *hapd = iface->bss[i];
1231 		if (iface->interfaces->ctrl_iface_init(hapd)) {
1232 			wpa_printf(MSG_ERROR,
1233 				   "Failed to setup control interface for %s",
1234 				   hapd->conf->iface);
1235 			return -1;
1236 		}
1237 	}
1238 
1239 	return 0;
1240 }
1241 
1242 
1243 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx)
1244 {
1245 	struct hostapd_iface *iface = eloop_ctx;
1246 
1247 	if (!iface->wait_channel_update) {
1248 		wpa_printf(MSG_INFO, "Channel list update timeout, but interface was not waiting for it");
1249 		return;
1250 	}
1251 
1252 	/*
1253 	 * It is possible that the existing channel list is acceptable, so try
1254 	 * to proceed.
1255 	 */
1256 	wpa_printf(MSG_DEBUG, "Channel list update timeout - try to continue anyway");
1257 	setup_interface2(iface);
1258 }
1259 
1260 
1261 void hostapd_channel_list_updated(struct hostapd_iface *iface, int initiator)
1262 {
1263 	if (!iface->wait_channel_update || initiator != REGDOM_SET_BY_USER)
1264 		return;
1265 
1266 	wpa_printf(MSG_DEBUG, "Channel list updated - continue setup");
1267 	eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1268 	setup_interface2(iface);
1269 }
1270 
1271 
1272 static int setup_interface(struct hostapd_iface *iface)
1273 {
1274 	struct hostapd_data *hapd = iface->bss[0];
1275 	size_t i;
1276 
1277 	/*
1278 	 * It is possible that setup_interface() is called after the interface
1279 	 * was disabled etc., in which case driver_ap_teardown is possibly set
1280 	 * to 1. Clear it here so any other key/station deletion, which is not
1281 	 * part of a teardown flow, would also call the relevant driver
1282 	 * callbacks.
1283 	 */
1284 	iface->driver_ap_teardown = 0;
1285 
1286 	if (!iface->phy[0]) {
1287 		const char *phy = hostapd_drv_get_radio_name(hapd);
1288 		if (phy) {
1289 			wpa_printf(MSG_DEBUG, "phy: %s", phy);
1290 			os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1291 		}
1292 	}
1293 
1294 	/*
1295 	 * Make sure that all BSSes get configured with a pointer to the same
1296 	 * driver interface.
1297 	 */
1298 	for (i = 1; i < iface->num_bss; i++) {
1299 		iface->bss[i]->driver = hapd->driver;
1300 		iface->bss[i]->drv_priv = hapd->drv_priv;
1301 	}
1302 
1303 	if (hostapd_validate_bssid_configuration(iface))
1304 		return -1;
1305 
1306 	/*
1307 	 * Initialize control interfaces early to allow external monitoring of
1308 	 * channel setup operations that may take considerable amount of time
1309 	 * especially for DFS cases.
1310 	 */
1311 	if (start_ctrl_iface(iface))
1312 		return -1;
1313 
1314 	if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
1315 		char country[4], previous_country[4];
1316 
1317 		hostapd_set_state(iface, HAPD_IFACE_COUNTRY_UPDATE);
1318 		if (hostapd_get_country(hapd, previous_country) < 0)
1319 			previous_country[0] = '\0';
1320 
1321 		os_memcpy(country, hapd->iconf->country, 3);
1322 		country[3] = '\0';
1323 		if (hostapd_set_country(hapd, country) < 0) {
1324 			wpa_printf(MSG_ERROR, "Failed to set country code");
1325 			return -1;
1326 		}
1327 
1328 		wpa_printf(MSG_DEBUG, "Previous country code %s, new country code %s",
1329 			   previous_country, country);
1330 
1331 		if (os_strncmp(previous_country, country, 2) != 0) {
1332 			wpa_printf(MSG_DEBUG, "Continue interface setup after channel list update");
1333 			iface->wait_channel_update = 1;
1334 			eloop_register_timeout(5, 0,
1335 					       channel_list_update_timeout,
1336 					       iface, NULL);
1337 			return 0;
1338 		}
1339 	}
1340 
1341 	return setup_interface2(iface);
1342 }
1343 
1344 
1345 static int setup_interface2(struct hostapd_iface *iface)
1346 {
1347 	iface->wait_channel_update = 0;
1348 
1349 	if (hostapd_get_hw_features(iface)) {
1350 		/* Not all drivers support this yet, so continue without hw
1351 		 * feature data. */
1352 	} else {
1353 		int ret = hostapd_select_hw_mode(iface);
1354 		if (ret < 0) {
1355 			wpa_printf(MSG_ERROR, "Could not select hw_mode and "
1356 				   "channel. (%d)", ret);
1357 			goto fail;
1358 		}
1359 		if (ret == 1) {
1360 			wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback (ACS)");
1361 			return 0;
1362 		}
1363 		ret = hostapd_check_ht_capab(iface);
1364 		if (ret < 0)
1365 			goto fail;
1366 		if (ret == 1) {
1367 			wpa_printf(MSG_DEBUG, "Interface initialization will "
1368 				   "be completed in a callback");
1369 			return 0;
1370 		}
1371 
1372 		if (iface->conf->ieee80211h)
1373 			wpa_printf(MSG_DEBUG, "DFS support is enabled");
1374 	}
1375 	return hostapd_setup_interface_complete(iface, 0);
1376 
1377 fail:
1378 	hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1379 	wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1380 	if (iface->interfaces && iface->interfaces->terminate_on_error)
1381 		eloop_terminate();
1382 	return -1;
1383 }
1384 
1385 
1386 #ifdef CONFIG_FST
1387 
1388 static const u8 * fst_hostapd_get_bssid_cb(void *ctx)
1389 {
1390 	struct hostapd_data *hapd = ctx;
1391 
1392 	return hapd->own_addr;
1393 }
1394 
1395 
1396 static void fst_hostapd_get_channel_info_cb(void *ctx,
1397 					    enum hostapd_hw_mode *hw_mode,
1398 					    u8 *channel)
1399 {
1400 	struct hostapd_data *hapd = ctx;
1401 
1402 	*hw_mode = ieee80211_freq_to_chan(hapd->iface->freq, channel);
1403 }
1404 
1405 
1406 static void fst_hostapd_set_ies_cb(void *ctx, const struct wpabuf *fst_ies)
1407 {
1408 	struct hostapd_data *hapd = ctx;
1409 
1410 	if (hapd->iface->fst_ies != fst_ies) {
1411 		hapd->iface->fst_ies = fst_ies;
1412 		if (ieee802_11_set_beacon(hapd))
1413 			wpa_printf(MSG_WARNING, "FST: Cannot set beacon");
1414 	}
1415 }
1416 
1417 
1418 static int fst_hostapd_send_action_cb(void *ctx, const u8 *da,
1419 				      struct wpabuf *buf)
1420 {
1421 	struct hostapd_data *hapd = ctx;
1422 
1423 	return hostapd_drv_send_action(hapd, hapd->iface->freq, 0, da,
1424 				       wpabuf_head(buf), wpabuf_len(buf));
1425 }
1426 
1427 
1428 static const struct wpabuf * fst_hostapd_get_mb_ie_cb(void *ctx, const u8 *addr)
1429 {
1430 	struct hostapd_data *hapd = ctx;
1431 	struct sta_info *sta = ap_get_sta(hapd, addr);
1432 
1433 	return sta ? sta->mb_ies : NULL;
1434 }
1435 
1436 
1437 static void fst_hostapd_update_mb_ie_cb(void *ctx, const u8 *addr,
1438 					const u8 *buf, size_t size)
1439 {
1440 	struct hostapd_data *hapd = ctx;
1441 	struct sta_info *sta = ap_get_sta(hapd, addr);
1442 
1443 	if (sta) {
1444 		struct mb_ies_info info;
1445 
1446 		if (!mb_ies_info_by_ies(&info, buf, size)) {
1447 			wpabuf_free(sta->mb_ies);
1448 			sta->mb_ies = mb_ies_by_info(&info);
1449 		}
1450 	}
1451 }
1452 
1453 
1454 static const u8 * fst_hostapd_get_sta(struct fst_get_peer_ctx **get_ctx,
1455 				      Boolean mb_only)
1456 {
1457 	struct sta_info *s = (struct sta_info *) *get_ctx;
1458 
1459 	if (mb_only) {
1460 		for (; s && !s->mb_ies; s = s->next)
1461 			;
1462 	}
1463 
1464 	if (s) {
1465 		*get_ctx = (struct fst_get_peer_ctx *) s->next;
1466 
1467 		return s->addr;
1468 	}
1469 
1470 	*get_ctx = NULL;
1471 	return NULL;
1472 }
1473 
1474 
1475 static const u8 * fst_hostapd_get_peer_first(void *ctx,
1476 					     struct fst_get_peer_ctx **get_ctx,
1477 					     Boolean mb_only)
1478 {
1479 	struct hostapd_data *hapd = ctx;
1480 
1481 	*get_ctx = (struct fst_get_peer_ctx *) hapd->sta_list;
1482 
1483 	return fst_hostapd_get_sta(get_ctx, mb_only);
1484 }
1485 
1486 
1487 static const u8 * fst_hostapd_get_peer_next(void *ctx,
1488 					    struct fst_get_peer_ctx **get_ctx,
1489 					    Boolean mb_only)
1490 {
1491 	return fst_hostapd_get_sta(get_ctx, mb_only);
1492 }
1493 
1494 
1495 void fst_hostapd_fill_iface_obj(struct hostapd_data *hapd,
1496 				struct fst_wpa_obj *iface_obj)
1497 {
1498 	iface_obj->ctx = hapd;
1499 	iface_obj->get_bssid = fst_hostapd_get_bssid_cb;
1500 	iface_obj->get_channel_info = fst_hostapd_get_channel_info_cb;
1501 	iface_obj->set_ies = fst_hostapd_set_ies_cb;
1502 	iface_obj->send_action = fst_hostapd_send_action_cb;
1503 	iface_obj->get_mb_ie = fst_hostapd_get_mb_ie_cb;
1504 	iface_obj->update_mb_ie = fst_hostapd_update_mb_ie_cb;
1505 	iface_obj->get_peer_first = fst_hostapd_get_peer_first;
1506 	iface_obj->get_peer_next = fst_hostapd_get_peer_next;
1507 }
1508 
1509 #endif /* CONFIG_FST */
1510 
1511 
1512 /**
1513  * hostapd_setup_interface_complete - Complete interface setup
1514  *
1515  * This function is called when previous steps in the interface setup has been
1516  * completed. This can also start operations, e.g., DFS, that will require
1517  * additional processing before interface is ready to be enabled. Such
1518  * operations will call this function from eloop callbacks when finished.
1519  */
1520 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
1521 {
1522 	struct hostapd_data *hapd = iface->bss[0];
1523 	size_t j;
1524 	u8 *prev_addr;
1525 	int delay_apply_cfg = 0;
1526 	int res_dfs_offload = 0;
1527 
1528 	if (err)
1529 		goto fail;
1530 
1531 	wpa_printf(MSG_DEBUG, "Completing interface initialization");
1532 	if (iface->conf->channel) {
1533 #ifdef NEED_AP_MLME
1534 		int res;
1535 #endif /* NEED_AP_MLME */
1536 
1537 		iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
1538 		wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
1539 			   "Frequency: %d MHz",
1540 			   hostapd_hw_mode_txt(iface->conf->hw_mode),
1541 			   iface->conf->channel, iface->freq);
1542 
1543 #ifdef NEED_AP_MLME
1544 		/* Handle DFS only if it is not offloaded to the driver */
1545 		if (!(iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)) {
1546 			/* Check DFS */
1547 			res = hostapd_handle_dfs(iface);
1548 			if (res <= 0) {
1549 				if (res < 0)
1550 					goto fail;
1551 				return res;
1552 			}
1553 		} else {
1554 			/* If DFS is offloaded to the driver */
1555 			res_dfs_offload = hostapd_handle_dfs_offload(iface);
1556 			if (res_dfs_offload <= 0) {
1557 				if (res_dfs_offload < 0)
1558 					goto fail;
1559 			} else {
1560 				wpa_printf(MSG_DEBUG,
1561 					   "Proceed with AP/channel setup");
1562 				/*
1563 				 * If this is a DFS channel, move to completing
1564 				 * AP setup.
1565 				 */
1566 				if (res_dfs_offload == 1)
1567 					goto dfs_offload;
1568 				/* Otherwise fall through. */
1569 			}
1570 		}
1571 #endif /* NEED_AP_MLME */
1572 
1573 #ifdef CONFIG_MESH
1574 		if (iface->mconf != NULL) {
1575 			wpa_printf(MSG_DEBUG,
1576 				   "%s: Mesh configuration will be applied while joining the mesh network",
1577 				   iface->bss[0]->conf->iface);
1578 			delay_apply_cfg = 1;
1579 		}
1580 #endif /* CONFIG_MESH */
1581 
1582 		if (!delay_apply_cfg &&
1583 		    hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
1584 				     hapd->iconf->channel,
1585 				     hapd->iconf->ieee80211n,
1586 				     hapd->iconf->ieee80211ac,
1587 				     hapd->iconf->secondary_channel,
1588 				     hapd->iconf->vht_oper_chwidth,
1589 				     hapd->iconf->vht_oper_centr_freq_seg0_idx,
1590 				     hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
1591 			wpa_printf(MSG_ERROR, "Could not set channel for "
1592 				   "kernel driver");
1593 			goto fail;
1594 		}
1595 	}
1596 
1597 	if (iface->current_mode) {
1598 		if (hostapd_prepare_rates(iface, iface->current_mode)) {
1599 			wpa_printf(MSG_ERROR, "Failed to prepare rates "
1600 				   "table.");
1601 			hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1602 				       HOSTAPD_LEVEL_WARNING,
1603 				       "Failed to prepare rates table.");
1604 			goto fail;
1605 		}
1606 	}
1607 
1608 	if (hapd->iconf->rts_threshold > -1 &&
1609 	    hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
1610 		wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
1611 			   "kernel driver");
1612 		goto fail;
1613 	}
1614 
1615 	if (hapd->iconf->fragm_threshold > -1 &&
1616 	    hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
1617 		wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
1618 			   "for kernel driver");
1619 		goto fail;
1620 	}
1621 
1622 	prev_addr = hapd->own_addr;
1623 
1624 	for (j = 0; j < iface->num_bss; j++) {
1625 		hapd = iface->bss[j];
1626 		if (j)
1627 			os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
1628 		if (hostapd_setup_bss(hapd, j == 0)) {
1629 			do {
1630 				hapd = iface->bss[j];
1631 				hostapd_bss_deinit_no_free(hapd);
1632 				hostapd_free_hapd_data(hapd);
1633 			} while (j-- > 0);
1634 			goto fail;
1635 		}
1636 		if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
1637 			prev_addr = hapd->own_addr;
1638 	}
1639 	hapd = iface->bss[0];
1640 
1641 	hostapd_tx_queue_params(iface);
1642 
1643 	ap_list_init(iface);
1644 	dl_list_init(&iface->sta_seen);
1645 
1646 	hostapd_set_acl(hapd);
1647 
1648 	if (hostapd_driver_commit(hapd) < 0) {
1649 		wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
1650 			   "configuration", __func__);
1651 		goto fail;
1652 	}
1653 
1654 	/*
1655 	 * WPS UPnP module can be initialized only when the "upnp_iface" is up.
1656 	 * If "interface" and "upnp_iface" are the same (e.g., non-bridge
1657 	 * mode), the interface is up only after driver_commit, so initialize
1658 	 * WPS after driver_commit.
1659 	 */
1660 	for (j = 0; j < iface->num_bss; j++) {
1661 		if (hostapd_init_wps_complete(iface->bss[j]))
1662 			goto fail;
1663 	}
1664 
1665 	if ((iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) &&
1666 	    !res_dfs_offload) {
1667 		/*
1668 		 * If freq is DFS, and DFS is offloaded to the driver, then wait
1669 		 * for CAC to complete.
1670 		 */
1671 		wpa_printf(MSG_DEBUG, "%s: Wait for CAC to complete", __func__);
1672 		return res_dfs_offload;
1673 	}
1674 
1675 #ifdef NEED_AP_MLME
1676 dfs_offload:
1677 #endif /* NEED_AP_MLME */
1678 
1679 #ifdef CONFIG_FST
1680 	if (hapd->iconf->fst_cfg.group_id[0]) {
1681 		struct fst_wpa_obj iface_obj;
1682 
1683 		fst_hostapd_fill_iface_obj(hapd, &iface_obj);
1684 		iface->fst = fst_attach(hapd->conf->iface, hapd->own_addr,
1685 					&iface_obj, &hapd->iconf->fst_cfg);
1686 		if (!iface->fst) {
1687 			wpa_printf(MSG_ERROR, "Could not attach to FST %s",
1688 				   hapd->iconf->fst_cfg.group_id);
1689 			goto fail;
1690 		}
1691 	}
1692 #endif /* CONFIG_FST */
1693 
1694 	hostapd_set_state(iface, HAPD_IFACE_ENABLED);
1695 	wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
1696 	if (hapd->setup_complete_cb)
1697 		hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
1698 
1699 	wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
1700 		   iface->bss[0]->conf->iface);
1701 	if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
1702 		iface->interfaces->terminate_on_error--;
1703 
1704 	return 0;
1705 
1706 fail:
1707 	wpa_printf(MSG_ERROR, "Interface initialization failed");
1708 	hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1709 	wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1710 #ifdef CONFIG_FST
1711 	if (iface->fst) {
1712 		fst_detach(iface->fst);
1713 		iface->fst = NULL;
1714 	}
1715 #endif /* CONFIG_FST */
1716 	if (iface->interfaces && iface->interfaces->terminate_on_error)
1717 		eloop_terminate();
1718 	return -1;
1719 }
1720 
1721 
1722 /**
1723  * hostapd_setup_interface - Setup of an interface
1724  * @iface: Pointer to interface data.
1725  * Returns: 0 on success, -1 on failure
1726  *
1727  * Initializes the driver interface, validates the configuration,
1728  * and sets driver parameters based on the configuration.
1729  * Flushes old stations, sets the channel, encryption,
1730  * beacons, and WDS links based on the configuration.
1731  *
1732  * If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
1733  * or DFS operations, this function returns 0 before such operations have been
1734  * completed. The pending operations are registered into eloop and will be
1735  * completed from eloop callbacks. Those callbacks end up calling
1736  * hostapd_setup_interface_complete() once setup has been completed.
1737  */
1738 int hostapd_setup_interface(struct hostapd_iface *iface)
1739 {
1740 	int ret;
1741 
1742 	ret = setup_interface(iface);
1743 	if (ret) {
1744 		wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
1745 			   iface->bss[0]->conf->iface);
1746 		return -1;
1747 	}
1748 
1749 	return 0;
1750 }
1751 
1752 
1753 /**
1754  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
1755  * @hapd_iface: Pointer to interface data
1756  * @conf: Pointer to per-interface configuration
1757  * @bss: Pointer to per-BSS configuration for this BSS
1758  * Returns: Pointer to allocated BSS data
1759  *
1760  * This function is used to allocate per-BSS data structure. This data will be
1761  * freed after hostapd_cleanup() is called for it during interface
1762  * deinitialization.
1763  */
1764 struct hostapd_data *
1765 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1766 		       struct hostapd_config *conf,
1767 		       struct hostapd_bss_config *bss)
1768 {
1769 	struct hostapd_data *hapd;
1770 
1771 	hapd = os_zalloc(sizeof(*hapd));
1772 	if (hapd == NULL)
1773 		return NULL;
1774 
1775 	hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1776 	hapd->iconf = conf;
1777 	hapd->conf = bss;
1778 	hapd->iface = hapd_iface;
1779 	hapd->driver = hapd->iconf->driver;
1780 	hapd->ctrl_sock = -1;
1781 
1782 	return hapd;
1783 }
1784 
1785 
1786 static void hostapd_bss_deinit(struct hostapd_data *hapd)
1787 {
1788 	wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
1789 		   hapd->conf->iface);
1790 	hostapd_bss_deinit_no_free(hapd);
1791 	wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1792 	hostapd_cleanup(hapd);
1793 }
1794 
1795 
1796 void hostapd_interface_deinit(struct hostapd_iface *iface)
1797 {
1798 	int j;
1799 
1800 	wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1801 	if (iface == NULL)
1802 		return;
1803 
1804 	hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1805 
1806 #ifdef CONFIG_IEEE80211N
1807 #ifdef NEED_AP_MLME
1808 	hostapd_stop_setup_timers(iface);
1809 	eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
1810 #endif /* NEED_AP_MLME */
1811 #endif /* CONFIG_IEEE80211N */
1812 	eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1813 	iface->wait_channel_update = 0;
1814 
1815 #ifdef CONFIG_FST
1816 	if (iface->fst) {
1817 		fst_detach(iface->fst);
1818 		iface->fst = NULL;
1819 	}
1820 #endif /* CONFIG_FST */
1821 
1822 	for (j = iface->num_bss - 1; j >= 0; j--)
1823 		hostapd_bss_deinit(iface->bss[j]);
1824 }
1825 
1826 
1827 void hostapd_interface_free(struct hostapd_iface *iface)
1828 {
1829 	size_t j;
1830 	wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1831 	for (j = 0; j < iface->num_bss; j++) {
1832 		wpa_printf(MSG_DEBUG, "%s: free hapd %p",
1833 			   __func__, iface->bss[j]);
1834 		os_free(iface->bss[j]);
1835 	}
1836 	hostapd_cleanup_iface(iface);
1837 }
1838 
1839 
1840 /**
1841  * hostapd_init - Allocate and initialize per-interface data
1842  * @config_file: Path to the configuration file
1843  * Returns: Pointer to the allocated interface data or %NULL on failure
1844  *
1845  * This function is used to allocate main data structures for per-interface
1846  * data. The allocated data buffer will be freed by calling
1847  * hostapd_cleanup_iface().
1848  */
1849 struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
1850 				    const char *config_file)
1851 {
1852 	struct hostapd_iface *hapd_iface = NULL;
1853 	struct hostapd_config *conf = NULL;
1854 	struct hostapd_data *hapd;
1855 	size_t i;
1856 
1857 	hapd_iface = os_zalloc(sizeof(*hapd_iface));
1858 	if (hapd_iface == NULL)
1859 		goto fail;
1860 
1861 	hapd_iface->config_fname = os_strdup(config_file);
1862 	if (hapd_iface->config_fname == NULL)
1863 		goto fail;
1864 
1865 	conf = interfaces->config_read_cb(hapd_iface->config_fname);
1866 	if (conf == NULL)
1867 		goto fail;
1868 	hapd_iface->conf = conf;
1869 
1870 	hapd_iface->num_bss = conf->num_bss;
1871 	hapd_iface->bss = os_calloc(conf->num_bss,
1872 				    sizeof(struct hostapd_data *));
1873 	if (hapd_iface->bss == NULL)
1874 		goto fail;
1875 
1876 	for (i = 0; i < conf->num_bss; i++) {
1877 		hapd = hapd_iface->bss[i] =
1878 			hostapd_alloc_bss_data(hapd_iface, conf,
1879 					       conf->bss[i]);
1880 		if (hapd == NULL)
1881 			goto fail;
1882 		hapd->msg_ctx = hapd;
1883 	}
1884 
1885 	return hapd_iface;
1886 
1887 fail:
1888 	wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
1889 		   config_file);
1890 	if (conf)
1891 		hostapd_config_free(conf);
1892 	if (hapd_iface) {
1893 		os_free(hapd_iface->config_fname);
1894 		os_free(hapd_iface->bss);
1895 		wpa_printf(MSG_DEBUG, "%s: free iface %p",
1896 			   __func__, hapd_iface);
1897 		os_free(hapd_iface);
1898 	}
1899 	return NULL;
1900 }
1901 
1902 
1903 static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
1904 {
1905 	size_t i, j;
1906 
1907 	for (i = 0; i < interfaces->count; i++) {
1908 		struct hostapd_iface *iface = interfaces->iface[i];
1909 		for (j = 0; j < iface->num_bss; j++) {
1910 			struct hostapd_data *hapd = iface->bss[j];
1911 			if (os_strcmp(ifname, hapd->conf->iface) == 0)
1912 				return 1;
1913 		}
1914 	}
1915 
1916 	return 0;
1917 }
1918 
1919 
1920 /**
1921  * hostapd_interface_init_bss - Read configuration file and init BSS data
1922  *
1923  * This function is used to parse configuration file for a BSS. This BSS is
1924  * added to an existing interface sharing the same radio (if any) or a new
1925  * interface is created if this is the first interface on a radio. This
1926  * allocate memory for the BSS. No actual driver operations are started.
1927  *
1928  * This is similar to hostapd_interface_init(), but for a case where the
1929  * configuration is used to add a single BSS instead of all BSSes for a radio.
1930  */
1931 struct hostapd_iface *
1932 hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
1933 			   const char *config_fname, int debug)
1934 {
1935 	struct hostapd_iface *new_iface = NULL, *iface = NULL;
1936 	struct hostapd_data *hapd;
1937 	int k;
1938 	size_t i, bss_idx;
1939 
1940 	if (!phy || !*phy)
1941 		return NULL;
1942 
1943 	for (i = 0; i < interfaces->count; i++) {
1944 		if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
1945 			iface = interfaces->iface[i];
1946 			break;
1947 		}
1948 	}
1949 
1950 	wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
1951 		   config_fname, phy, iface ? "" : " --> new PHY");
1952 	if (iface) {
1953 		struct hostapd_config *conf;
1954 		struct hostapd_bss_config **tmp_conf;
1955 		struct hostapd_data **tmp_bss;
1956 		struct hostapd_bss_config *bss;
1957 		const char *ifname;
1958 
1959 		/* Add new BSS to existing iface */
1960 		conf = interfaces->config_read_cb(config_fname);
1961 		if (conf == NULL)
1962 			return NULL;
1963 		if (conf->num_bss > 1) {
1964 			wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
1965 			hostapd_config_free(conf);
1966 			return NULL;
1967 		}
1968 
1969 		ifname = conf->bss[0]->iface;
1970 		if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
1971 			wpa_printf(MSG_ERROR,
1972 				   "Interface name %s already in use", ifname);
1973 			hostapd_config_free(conf);
1974 			return NULL;
1975 		}
1976 
1977 		tmp_conf = os_realloc_array(
1978 			iface->conf->bss, iface->conf->num_bss + 1,
1979 			sizeof(struct hostapd_bss_config *));
1980 		tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
1981 					   sizeof(struct hostapd_data *));
1982 		if (tmp_bss)
1983 			iface->bss = tmp_bss;
1984 		if (tmp_conf) {
1985 			iface->conf->bss = tmp_conf;
1986 			iface->conf->last_bss = tmp_conf[0];
1987 		}
1988 		if (tmp_bss == NULL || tmp_conf == NULL) {
1989 			hostapd_config_free(conf);
1990 			return NULL;
1991 		}
1992 		bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
1993 		iface->conf->num_bss++;
1994 
1995 		hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
1996 		if (hapd == NULL) {
1997 			iface->conf->num_bss--;
1998 			hostapd_config_free(conf);
1999 			return NULL;
2000 		}
2001 		iface->conf->last_bss = bss;
2002 		iface->bss[iface->num_bss] = hapd;
2003 		hapd->msg_ctx = hapd;
2004 
2005 		bss_idx = iface->num_bss++;
2006 		conf->num_bss--;
2007 		conf->bss[0] = NULL;
2008 		hostapd_config_free(conf);
2009 	} else {
2010 		/* Add a new iface with the first BSS */
2011 		new_iface = iface = hostapd_init(interfaces, config_fname);
2012 		if (!iface)
2013 			return NULL;
2014 		os_strlcpy(iface->phy, phy, sizeof(iface->phy));
2015 		iface->interfaces = interfaces;
2016 		bss_idx = 0;
2017 	}
2018 
2019 	for (k = 0; k < debug; k++) {
2020 		if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
2021 			iface->bss[bss_idx]->conf->logger_stdout_level--;
2022 	}
2023 
2024 	if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
2025 	    !hostapd_drv_none(iface->bss[bss_idx])) {
2026 		wpa_printf(MSG_ERROR, "Interface name not specified in %s",
2027 			   config_fname);
2028 		if (new_iface)
2029 			hostapd_interface_deinit_free(new_iface);
2030 		return NULL;
2031 	}
2032 
2033 	return iface;
2034 }
2035 
2036 
2037 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
2038 {
2039 	const struct wpa_driver_ops *driver;
2040 	void *drv_priv;
2041 
2042 	wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
2043 	if (iface == NULL)
2044 		return;
2045 	wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
2046 		   __func__, (unsigned int) iface->num_bss,
2047 		   (unsigned int) iface->conf->num_bss);
2048 	driver = iface->bss[0]->driver;
2049 	drv_priv = iface->bss[0]->drv_priv;
2050 	hostapd_interface_deinit(iface);
2051 	wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2052 		   __func__, driver, drv_priv);
2053 	if (driver && driver->hapd_deinit && drv_priv) {
2054 		driver->hapd_deinit(drv_priv);
2055 		iface->bss[0]->drv_priv = NULL;
2056 	}
2057 	hostapd_interface_free(iface);
2058 }
2059 
2060 
2061 static void hostapd_deinit_driver(const struct wpa_driver_ops *driver,
2062 				  void *drv_priv,
2063 				  struct hostapd_iface *hapd_iface)
2064 {
2065 	size_t j;
2066 
2067 	wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
2068 		   __func__, driver, drv_priv);
2069 	if (driver && driver->hapd_deinit && drv_priv) {
2070 		driver->hapd_deinit(drv_priv);
2071 		for (j = 0; j < hapd_iface->num_bss; j++) {
2072 			wpa_printf(MSG_DEBUG, "%s:bss[%d]->drv_priv=%p",
2073 				   __func__, (int) j,
2074 				   hapd_iface->bss[j]->drv_priv);
2075 			if (hapd_iface->bss[j]->drv_priv == drv_priv)
2076 				hapd_iface->bss[j]->drv_priv = NULL;
2077 		}
2078 	}
2079 }
2080 
2081 
2082 int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
2083 {
2084 	size_t j;
2085 
2086 	if (hapd_iface->bss[0]->drv_priv != NULL) {
2087 		wpa_printf(MSG_ERROR, "Interface %s already enabled",
2088 			   hapd_iface->conf->bss[0]->iface);
2089 		return -1;
2090 	}
2091 
2092 	wpa_printf(MSG_DEBUG, "Enable interface %s",
2093 		   hapd_iface->conf->bss[0]->iface);
2094 
2095 	for (j = 0; j < hapd_iface->num_bss; j++)
2096 		hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2097 	if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2098 		wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
2099 		return -1;
2100 	}
2101 
2102 	if (hapd_iface->interfaces == NULL ||
2103 	    hapd_iface->interfaces->driver_init == NULL ||
2104 	    hapd_iface->interfaces->driver_init(hapd_iface))
2105 		return -1;
2106 
2107 	if (hostapd_setup_interface(hapd_iface)) {
2108 		hostapd_deinit_driver(hapd_iface->bss[0]->driver,
2109 				      hapd_iface->bss[0]->drv_priv,
2110 				      hapd_iface);
2111 		return -1;
2112 	}
2113 
2114 	return 0;
2115 }
2116 
2117 
2118 int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
2119 {
2120 	size_t j;
2121 
2122 	wpa_printf(MSG_DEBUG, "Reload interface %s",
2123 		   hapd_iface->conf->bss[0]->iface);
2124 	for (j = 0; j < hapd_iface->num_bss; j++)
2125 		hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
2126 	if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
2127 		wpa_printf(MSG_ERROR, "Updated configuration is invalid");
2128 		return -1;
2129 	}
2130 	hostapd_clear_old(hapd_iface);
2131 	for (j = 0; j < hapd_iface->num_bss; j++)
2132 		hostapd_reload_bss(hapd_iface->bss[j]);
2133 
2134 	return 0;
2135 }
2136 
2137 
2138 int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
2139 {
2140 	size_t j;
2141 	const struct wpa_driver_ops *driver;
2142 	void *drv_priv;
2143 
2144 	if (hapd_iface == NULL)
2145 		return -1;
2146 
2147 	if (hapd_iface->bss[0]->drv_priv == NULL) {
2148 		wpa_printf(MSG_INFO, "Interface %s already disabled",
2149 			   hapd_iface->conf->bss[0]->iface);
2150 		return -1;
2151 	}
2152 
2153 	wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
2154 	driver = hapd_iface->bss[0]->driver;
2155 	drv_priv = hapd_iface->bss[0]->drv_priv;
2156 
2157 	hapd_iface->driver_ap_teardown =
2158 		!!(hapd_iface->drv_flags &
2159 		   WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2160 
2161 	/* same as hostapd_interface_deinit without deinitializing ctrl-iface */
2162 	for (j = 0; j < hapd_iface->num_bss; j++) {
2163 		struct hostapd_data *hapd = hapd_iface->bss[j];
2164 		hostapd_bss_deinit_no_free(hapd);
2165 		hostapd_free_hapd_data(hapd);
2166 	}
2167 
2168 	hostapd_deinit_driver(driver, drv_priv, hapd_iface);
2169 
2170 	/* From hostapd_cleanup_iface: These were initialized in
2171 	 * hostapd_setup_interface and hostapd_setup_interface_complete
2172 	 */
2173 	hostapd_cleanup_iface_partial(hapd_iface);
2174 
2175 	wpa_printf(MSG_DEBUG, "Interface %s disabled",
2176 		   hapd_iface->bss[0]->conf->iface);
2177 	hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
2178 	return 0;
2179 }
2180 
2181 
2182 static struct hostapd_iface *
2183 hostapd_iface_alloc(struct hapd_interfaces *interfaces)
2184 {
2185 	struct hostapd_iface **iface, *hapd_iface;
2186 
2187 	iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
2188 				 sizeof(struct hostapd_iface *));
2189 	if (iface == NULL)
2190 		return NULL;
2191 	interfaces->iface = iface;
2192 	hapd_iface = interfaces->iface[interfaces->count] =
2193 		os_zalloc(sizeof(*hapd_iface));
2194 	if (hapd_iface == NULL) {
2195 		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2196 			   "the interface", __func__);
2197 		return NULL;
2198 	}
2199 	interfaces->count++;
2200 	hapd_iface->interfaces = interfaces;
2201 
2202 	return hapd_iface;
2203 }
2204 
2205 
2206 static struct hostapd_config *
2207 hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
2208 		     const char *ctrl_iface, const char *driver)
2209 {
2210 	struct hostapd_bss_config *bss;
2211 	struct hostapd_config *conf;
2212 
2213 	/* Allocates memory for bss and conf */
2214 	conf = hostapd_config_defaults();
2215 	if (conf == NULL) {
2216 		 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
2217 				"configuration", __func__);
2218 		return NULL;
2219 	}
2220 
2221 	if (driver) {
2222 		int j;
2223 
2224 		for (j = 0; wpa_drivers[j]; j++) {
2225 			if (os_strcmp(driver, wpa_drivers[j]->name) == 0) {
2226 				conf->driver = wpa_drivers[j];
2227 				goto skip;
2228 			}
2229 		}
2230 
2231 		wpa_printf(MSG_ERROR,
2232 			   "Invalid/unknown driver '%s' - registering the default driver",
2233 			   driver);
2234 	}
2235 
2236 	conf->driver = wpa_drivers[0];
2237 	if (conf->driver == NULL) {
2238 		wpa_printf(MSG_ERROR, "No driver wrappers registered!");
2239 		hostapd_config_free(conf);
2240 		return NULL;
2241 	}
2242 
2243 skip:
2244 	bss = conf->last_bss = conf->bss[0];
2245 
2246 	os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
2247 	bss->ctrl_interface = os_strdup(ctrl_iface);
2248 	if (bss->ctrl_interface == NULL) {
2249 		hostapd_config_free(conf);
2250 		return NULL;
2251 	}
2252 
2253 	/* Reading configuration file skipped, will be done in SET!
2254 	 * From reading the configuration till the end has to be done in
2255 	 * SET
2256 	 */
2257 	return conf;
2258 }
2259 
2260 
2261 static int hostapd_data_alloc(struct hostapd_iface *hapd_iface,
2262 			      struct hostapd_config *conf)
2263 {
2264 	size_t i;
2265 	struct hostapd_data *hapd;
2266 
2267 	hapd_iface->bss = os_calloc(conf->num_bss,
2268 				    sizeof(struct hostapd_data *));
2269 	if (hapd_iface->bss == NULL)
2270 		return -1;
2271 
2272 	for (i = 0; i < conf->num_bss; i++) {
2273 		hapd = hapd_iface->bss[i] =
2274 			hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
2275 		if (hapd == NULL) {
2276 			while (i > 0) {
2277 				i--;
2278 				os_free(hapd_iface->bss[i]);
2279 				hapd_iface->bss[i] = NULL;
2280 			}
2281 			os_free(hapd_iface->bss);
2282 			hapd_iface->bss = NULL;
2283 			return -1;
2284 		}
2285 		hapd->msg_ctx = hapd;
2286 	}
2287 
2288 	hapd_iface->conf = conf;
2289 	hapd_iface->num_bss = conf->num_bss;
2290 
2291 	return 0;
2292 }
2293 
2294 
2295 int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
2296 {
2297 	struct hostapd_config *conf = NULL;
2298 	struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
2299 	struct hostapd_data *hapd;
2300 	char *ptr;
2301 	size_t i, j;
2302 	const char *conf_file = NULL, *phy_name = NULL;
2303 
2304 	if (os_strncmp(buf, "bss_config=", 11) == 0) {
2305 		char *pos;
2306 		phy_name = buf + 11;
2307 		pos = os_strchr(phy_name, ':');
2308 		if (!pos)
2309 			return -1;
2310 		*pos++ = '\0';
2311 		conf_file = pos;
2312 		if (!os_strlen(conf_file))
2313 			return -1;
2314 
2315 		hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
2316 							conf_file, 0);
2317 		if (!hapd_iface)
2318 			return -1;
2319 		for (j = 0; j < interfaces->count; j++) {
2320 			if (interfaces->iface[j] == hapd_iface)
2321 				break;
2322 		}
2323 		if (j == interfaces->count) {
2324 			struct hostapd_iface **tmp;
2325 			tmp = os_realloc_array(interfaces->iface,
2326 					       interfaces->count + 1,
2327 					       sizeof(struct hostapd_iface *));
2328 			if (!tmp) {
2329 				hostapd_interface_deinit_free(hapd_iface);
2330 				return -1;
2331 			}
2332 			interfaces->iface = tmp;
2333 			interfaces->iface[interfaces->count++] = hapd_iface;
2334 			new_iface = hapd_iface;
2335 		}
2336 
2337 		if (new_iface) {
2338 			if (interfaces->driver_init(hapd_iface))
2339 				goto fail;
2340 
2341 			if (hostapd_setup_interface(hapd_iface)) {
2342 				hostapd_deinit_driver(
2343 					hapd_iface->bss[0]->driver,
2344 					hapd_iface->bss[0]->drv_priv,
2345 					hapd_iface);
2346 				goto fail;
2347 			}
2348 		} else {
2349 			/* Assign new BSS with bss[0]'s driver info */
2350 			hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
2351 			hapd->driver = hapd_iface->bss[0]->driver;
2352 			hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
2353 			os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
2354 				  ETH_ALEN);
2355 
2356 			if (start_ctrl_iface_bss(hapd) < 0 ||
2357 			    (hapd_iface->state == HAPD_IFACE_ENABLED &&
2358 			     hostapd_setup_bss(hapd, -1))) {
2359 				hostapd_cleanup(hapd);
2360 				hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
2361 				hapd_iface->conf->num_bss--;
2362 				hapd_iface->num_bss--;
2363 				wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
2364 					   __func__, hapd, hapd->conf->iface);
2365 				hostapd_config_free_bss(hapd->conf);
2366 				hapd->conf = NULL;
2367 				os_free(hapd);
2368 				return -1;
2369 			}
2370 		}
2371 		return 0;
2372 	}
2373 
2374 	ptr = os_strchr(buf, ' ');
2375 	if (ptr == NULL)
2376 		return -1;
2377 	*ptr++ = '\0';
2378 
2379 	if (os_strncmp(ptr, "config=", 7) == 0)
2380 		conf_file = ptr + 7;
2381 
2382 	for (i = 0; i < interfaces->count; i++) {
2383 		if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
2384 			       buf)) {
2385 			wpa_printf(MSG_INFO, "Cannot add interface - it "
2386 				   "already exists");
2387 			return -1;
2388 		}
2389 	}
2390 
2391 	hapd_iface = hostapd_iface_alloc(interfaces);
2392 	if (hapd_iface == NULL) {
2393 		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2394 			   "for interface", __func__);
2395 		goto fail;
2396 	}
2397 	new_iface = hapd_iface;
2398 
2399 	if (conf_file && interfaces->config_read_cb) {
2400 		conf = interfaces->config_read_cb(conf_file);
2401 		if (conf && conf->bss)
2402 			os_strlcpy(conf->bss[0]->iface, buf,
2403 				   sizeof(conf->bss[0]->iface));
2404 	} else {
2405 		char *driver = os_strchr(ptr, ' ');
2406 
2407 		if (driver)
2408 			*driver++ = '\0';
2409 		conf = hostapd_config_alloc(interfaces, buf, ptr, driver);
2410 	}
2411 
2412 	if (conf == NULL || conf->bss == NULL) {
2413 		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2414 			   "for configuration", __func__);
2415 		goto fail;
2416 	}
2417 
2418 	if (hostapd_data_alloc(hapd_iface, conf) < 0) {
2419 		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
2420 			   "for hostapd", __func__);
2421 		goto fail;
2422 	}
2423 	conf = NULL;
2424 
2425 	if (start_ctrl_iface(hapd_iface) < 0)
2426 		goto fail;
2427 
2428 	wpa_printf(MSG_INFO, "Add interface '%s'",
2429 		   hapd_iface->conf->bss[0]->iface);
2430 
2431 	return 0;
2432 
2433 fail:
2434 	if (conf)
2435 		hostapd_config_free(conf);
2436 	if (hapd_iface) {
2437 		if (hapd_iface->bss) {
2438 			for (i = 0; i < hapd_iface->num_bss; i++) {
2439 				hapd = hapd_iface->bss[i];
2440 				if (!hapd)
2441 					continue;
2442 				if (hapd_iface->interfaces &&
2443 				    hapd_iface->interfaces->ctrl_iface_deinit)
2444 					hapd_iface->interfaces->
2445 						ctrl_iface_deinit(hapd);
2446 				wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2447 					   __func__, hapd_iface->bss[i],
2448 					   hapd->conf->iface);
2449 				hostapd_cleanup(hapd);
2450 				os_free(hapd);
2451 				hapd_iface->bss[i] = NULL;
2452 			}
2453 			os_free(hapd_iface->bss);
2454 			hapd_iface->bss = NULL;
2455 		}
2456 		if (new_iface) {
2457 			interfaces->count--;
2458 			interfaces->iface[interfaces->count] = NULL;
2459 		}
2460 		hostapd_cleanup_iface(hapd_iface);
2461 	}
2462 	return -1;
2463 }
2464 
2465 
2466 static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
2467 {
2468 	size_t i;
2469 
2470 	wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
2471 
2472 	/* Remove hostapd_data only if it has already been initialized */
2473 	if (idx < iface->num_bss) {
2474 		struct hostapd_data *hapd = iface->bss[idx];
2475 
2476 		hostapd_bss_deinit(hapd);
2477 		wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
2478 			   __func__, hapd, hapd->conf->iface);
2479 		hostapd_config_free_bss(hapd->conf);
2480 		hapd->conf = NULL;
2481 		os_free(hapd);
2482 
2483 		iface->num_bss--;
2484 
2485 		for (i = idx; i < iface->num_bss; i++)
2486 			iface->bss[i] = iface->bss[i + 1];
2487 	} else {
2488 		hostapd_config_free_bss(iface->conf->bss[idx]);
2489 		iface->conf->bss[idx] = NULL;
2490 	}
2491 
2492 	iface->conf->num_bss--;
2493 	for (i = idx; i < iface->conf->num_bss; i++)
2494 		iface->conf->bss[i] = iface->conf->bss[i + 1];
2495 
2496 	return 0;
2497 }
2498 
2499 
2500 int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
2501 {
2502 	struct hostapd_iface *hapd_iface;
2503 	size_t i, j, k = 0;
2504 
2505 	for (i = 0; i < interfaces->count; i++) {
2506 		hapd_iface = interfaces->iface[i];
2507 		if (hapd_iface == NULL)
2508 			return -1;
2509 		if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
2510 			wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
2511 			hapd_iface->driver_ap_teardown =
2512 				!!(hapd_iface->drv_flags &
2513 				   WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2514 
2515 			hostapd_interface_deinit_free(hapd_iface);
2516 			k = i;
2517 			while (k < (interfaces->count - 1)) {
2518 				interfaces->iface[k] =
2519 					interfaces->iface[k + 1];
2520 				k++;
2521 			}
2522 			interfaces->count--;
2523 			return 0;
2524 		}
2525 
2526 		for (j = 0; j < hapd_iface->conf->num_bss; j++) {
2527 			if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
2528 				hapd_iface->driver_ap_teardown =
2529 					!(hapd_iface->drv_flags &
2530 					  WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2531 				return hostapd_remove_bss(hapd_iface, j);
2532 			}
2533 		}
2534 	}
2535 	return -1;
2536 }
2537 
2538 
2539 /**
2540  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
2541  * @hapd: Pointer to BSS data
2542  * @sta: Pointer to the associated STA data
2543  * @reassoc: 1 to indicate this was a re-association; 0 = first association
2544  *
2545  * This function will be called whenever a station associates with the AP. It
2546  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
2547  * from drv_callbacks.c based on driver events for drivers that take care of
2548  * management frames (IEEE 802.11 authentication and association) internally.
2549  */
2550 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
2551 			   int reassoc)
2552 {
2553 	if (hapd->tkip_countermeasures) {
2554 		hostapd_drv_sta_deauth(hapd, sta->addr,
2555 				       WLAN_REASON_MICHAEL_MIC_FAILURE);
2556 		return;
2557 	}
2558 
2559 	hostapd_prune_associations(hapd, sta->addr);
2560 
2561 	/* IEEE 802.11F (IAPP) */
2562 	if (hapd->conf->ieee802_11f)
2563 		iapp_new_station(hapd->iapp, sta);
2564 
2565 #ifdef CONFIG_P2P
2566 	if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
2567 		sta->no_p2p_set = 1;
2568 		hapd->num_sta_no_p2p++;
2569 		if (hapd->num_sta_no_p2p == 1)
2570 			hostapd_p2p_non_p2p_sta_connected(hapd);
2571 	}
2572 #endif /* CONFIG_P2P */
2573 
2574 	/* Start accounting here, if IEEE 802.1X and WPA are not used.
2575 	 * IEEE 802.1X/WPA code will start accounting after the station has
2576 	 * been authorized. */
2577 	if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) {
2578 		ap_sta_set_authorized(hapd, sta, 1);
2579 		os_get_reltime(&sta->connected_time);
2580 		accounting_sta_start(hapd, sta);
2581 	}
2582 
2583 	/* Start IEEE 802.1X authentication process for new stations */
2584 	ieee802_1x_new_station(hapd, sta);
2585 	if (reassoc) {
2586 		if (sta->auth_alg != WLAN_AUTH_FT &&
2587 		    !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
2588 			wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
2589 	} else
2590 		wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
2591 
2592 	if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
2593 		wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
2594 			   "for " MACSTR " (%d seconds - ap_max_inactivity)",
2595 			   __func__, MAC2STR(sta->addr),
2596 			   hapd->conf->ap_max_inactivity);
2597 		eloop_cancel_timeout(ap_handle_timer, hapd, sta);
2598 		eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
2599 				       ap_handle_timer, hapd, sta);
2600 	}
2601 }
2602 
2603 
2604 const char * hostapd_state_text(enum hostapd_iface_state s)
2605 {
2606 	switch (s) {
2607 	case HAPD_IFACE_UNINITIALIZED:
2608 		return "UNINITIALIZED";
2609 	case HAPD_IFACE_DISABLED:
2610 		return "DISABLED";
2611 	case HAPD_IFACE_COUNTRY_UPDATE:
2612 		return "COUNTRY_UPDATE";
2613 	case HAPD_IFACE_ACS:
2614 		return "ACS";
2615 	case HAPD_IFACE_HT_SCAN:
2616 		return "HT_SCAN";
2617 	case HAPD_IFACE_DFS:
2618 		return "DFS";
2619 	case HAPD_IFACE_ENABLED:
2620 		return "ENABLED";
2621 	}
2622 
2623 	return "UNKNOWN";
2624 }
2625 
2626 
2627 void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
2628 {
2629 	wpa_printf(MSG_INFO, "%s: interface state %s->%s",
2630 		   iface->conf->bss[0]->iface, hostapd_state_text(iface->state),
2631 		   hostapd_state_text(s));
2632 	iface->state = s;
2633 }
2634 
2635 
2636 #ifdef NEED_AP_MLME
2637 
2638 static void free_beacon_data(struct beacon_data *beacon)
2639 {
2640 	os_free(beacon->head);
2641 	beacon->head = NULL;
2642 	os_free(beacon->tail);
2643 	beacon->tail = NULL;
2644 	os_free(beacon->probe_resp);
2645 	beacon->probe_resp = NULL;
2646 	os_free(beacon->beacon_ies);
2647 	beacon->beacon_ies = NULL;
2648 	os_free(beacon->proberesp_ies);
2649 	beacon->proberesp_ies = NULL;
2650 	os_free(beacon->assocresp_ies);
2651 	beacon->assocresp_ies = NULL;
2652 }
2653 
2654 
2655 static int hostapd_build_beacon_data(struct hostapd_data *hapd,
2656 				     struct beacon_data *beacon)
2657 {
2658 	struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
2659 	struct wpa_driver_ap_params params;
2660 	int ret;
2661 
2662 	os_memset(beacon, 0, sizeof(*beacon));
2663 	ret = ieee802_11_build_ap_params(hapd, &params);
2664 	if (ret < 0)
2665 		return ret;
2666 
2667 	ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
2668 					 &proberesp_extra,
2669 					 &assocresp_extra);
2670 	if (ret)
2671 		goto free_ap_params;
2672 
2673 	ret = -1;
2674 	beacon->head = os_malloc(params.head_len);
2675 	if (!beacon->head)
2676 		goto free_ap_extra_ies;
2677 
2678 	os_memcpy(beacon->head, params.head, params.head_len);
2679 	beacon->head_len = params.head_len;
2680 
2681 	beacon->tail = os_malloc(params.tail_len);
2682 	if (!beacon->tail)
2683 		goto free_beacon;
2684 
2685 	os_memcpy(beacon->tail, params.tail, params.tail_len);
2686 	beacon->tail_len = params.tail_len;
2687 
2688 	if (params.proberesp != NULL) {
2689 		beacon->probe_resp = os_malloc(params.proberesp_len);
2690 		if (!beacon->probe_resp)
2691 			goto free_beacon;
2692 
2693 		os_memcpy(beacon->probe_resp, params.proberesp,
2694 			  params.proberesp_len);
2695 		beacon->probe_resp_len = params.proberesp_len;
2696 	}
2697 
2698 	/* copy the extra ies */
2699 	if (beacon_extra) {
2700 		beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
2701 		if (!beacon->beacon_ies)
2702 			goto free_beacon;
2703 
2704 		os_memcpy(beacon->beacon_ies,
2705 			  beacon_extra->buf, wpabuf_len(beacon_extra));
2706 		beacon->beacon_ies_len = wpabuf_len(beacon_extra);
2707 	}
2708 
2709 	if (proberesp_extra) {
2710 		beacon->proberesp_ies =
2711 			os_malloc(wpabuf_len(proberesp_extra));
2712 		if (!beacon->proberesp_ies)
2713 			goto free_beacon;
2714 
2715 		os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
2716 			  wpabuf_len(proberesp_extra));
2717 		beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
2718 	}
2719 
2720 	if (assocresp_extra) {
2721 		beacon->assocresp_ies =
2722 			os_malloc(wpabuf_len(assocresp_extra));
2723 		if (!beacon->assocresp_ies)
2724 			goto free_beacon;
2725 
2726 		os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
2727 			  wpabuf_len(assocresp_extra));
2728 		beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
2729 	}
2730 
2731 	ret = 0;
2732 free_beacon:
2733 	/* if the function fails, the caller should not free beacon data */
2734 	if (ret)
2735 		free_beacon_data(beacon);
2736 
2737 free_ap_extra_ies:
2738 	hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
2739 				  assocresp_extra);
2740 free_ap_params:
2741 	ieee802_11_free_ap_params(&params);
2742 	return ret;
2743 }
2744 
2745 
2746 /*
2747  * TODO: This flow currently supports only changing frequency within the
2748  * same hw_mode. Any other changes to MAC parameters or provided settings (even
2749  * width) are not supported.
2750  */
2751 static int hostapd_change_config_freq(struct hostapd_data *hapd,
2752 				      struct hostapd_config *conf,
2753 				      struct hostapd_freq_params *params,
2754 				      struct hostapd_freq_params *old_params)
2755 {
2756 	int channel;
2757 
2758 	if (!params->channel) {
2759 		/* check if the new channel is supported by hw */
2760 		params->channel = hostapd_hw_get_channel(hapd, params->freq);
2761 	}
2762 
2763 	channel = params->channel;
2764 	if (!channel)
2765 		return -1;
2766 
2767 	/* if a pointer to old_params is provided we save previous state */
2768 	if (old_params) {
2769 		old_params->channel = conf->channel;
2770 		old_params->ht_enabled = conf->ieee80211n;
2771 		old_params->sec_channel_offset = conf->secondary_channel;
2772 	}
2773 
2774 	conf->channel = channel;
2775 	conf->ieee80211n = params->ht_enabled;
2776 	conf->secondary_channel = params->sec_channel_offset;
2777 
2778 	/* TODO: maybe call here hostapd_config_check here? */
2779 
2780 	return 0;
2781 }
2782 
2783 
2784 static int hostapd_fill_csa_settings(struct hostapd_data *hapd,
2785 				     struct csa_settings *settings)
2786 {
2787 	struct hostapd_iface *iface = hapd->iface;
2788 	struct hostapd_freq_params old_freq;
2789 	int ret;
2790 
2791 	os_memset(&old_freq, 0, sizeof(old_freq));
2792 	if (!iface || !iface->freq || hapd->csa_in_progress)
2793 		return -1;
2794 
2795 	ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
2796 					 &settings->freq_params,
2797 					 &old_freq);
2798 	if (ret)
2799 		return ret;
2800 
2801 	ret = hostapd_build_beacon_data(hapd, &settings->beacon_after);
2802 
2803 	/* change back the configuration */
2804 	hostapd_change_config_freq(iface->bss[0], iface->conf,
2805 				   &old_freq, NULL);
2806 
2807 	if (ret)
2808 		return ret;
2809 
2810 	/* set channel switch parameters for csa ie */
2811 	hapd->cs_freq_params = settings->freq_params;
2812 	hapd->cs_count = settings->cs_count;
2813 	hapd->cs_block_tx = settings->block_tx;
2814 
2815 	ret = hostapd_build_beacon_data(hapd, &settings->beacon_csa);
2816 	if (ret) {
2817 		free_beacon_data(&settings->beacon_after);
2818 		return ret;
2819 	}
2820 
2821 	settings->counter_offset_beacon = hapd->cs_c_off_beacon;
2822 	settings->counter_offset_presp = hapd->cs_c_off_proberesp;
2823 
2824 	return 0;
2825 }
2826 
2827 
2828 void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
2829 {
2830 	os_memset(&hapd->cs_freq_params, 0, sizeof(hapd->cs_freq_params));
2831 	hapd->cs_count = 0;
2832 	hapd->cs_block_tx = 0;
2833 	hapd->cs_c_off_beacon = 0;
2834 	hapd->cs_c_off_proberesp = 0;
2835 	hapd->csa_in_progress = 0;
2836 }
2837 
2838 
2839 int hostapd_switch_channel(struct hostapd_data *hapd,
2840 			   struct csa_settings *settings)
2841 {
2842 	int ret;
2843 
2844 	if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA)) {
2845 		wpa_printf(MSG_INFO, "CSA is not supported");
2846 		return -1;
2847 	}
2848 
2849 	ret = hostapd_fill_csa_settings(hapd, settings);
2850 	if (ret)
2851 		return ret;
2852 
2853 	ret = hostapd_drv_switch_channel(hapd, settings);
2854 	free_beacon_data(&settings->beacon_csa);
2855 	free_beacon_data(&settings->beacon_after);
2856 
2857 	if (ret) {
2858 		/* if we failed, clean cs parameters */
2859 		hostapd_cleanup_cs_params(hapd);
2860 		return ret;
2861 	}
2862 
2863 	hapd->csa_in_progress = 1;
2864 	return 0;
2865 }
2866 
2867 
2868 void
2869 hostapd_switch_channel_fallback(struct hostapd_iface *iface,
2870 				const struct hostapd_freq_params *freq_params)
2871 {
2872 	int vht_seg0_idx = 0, vht_seg1_idx = 0, vht_bw = VHT_CHANWIDTH_USE_HT;
2873 	unsigned int i;
2874 
2875 	wpa_printf(MSG_DEBUG, "Restarting all CSA-related BSSes");
2876 
2877 	if (freq_params->center_freq1)
2878 		vht_seg0_idx = 36 + (freq_params->center_freq1 - 5180) / 5;
2879 	if (freq_params->center_freq2)
2880 		vht_seg1_idx = 36 + (freq_params->center_freq2 - 5180) / 5;
2881 
2882 	switch (freq_params->bandwidth) {
2883 	case 0:
2884 	case 20:
2885 	case 40:
2886 		vht_bw = VHT_CHANWIDTH_USE_HT;
2887 		break;
2888 	case 80:
2889 		if (freq_params->center_freq2)
2890 			vht_bw = VHT_CHANWIDTH_80P80MHZ;
2891 		else
2892 			vht_bw = VHT_CHANWIDTH_80MHZ;
2893 		break;
2894 	case 160:
2895 		vht_bw = VHT_CHANWIDTH_160MHZ;
2896 		break;
2897 	default:
2898 		wpa_printf(MSG_WARNING, "Unknown CSA bandwidth: %d",
2899 			   freq_params->bandwidth);
2900 		break;
2901 	}
2902 
2903 	iface->freq = freq_params->freq;
2904 	iface->conf->channel = freq_params->channel;
2905 	iface->conf->secondary_channel = freq_params->sec_channel_offset;
2906 	iface->conf->vht_oper_centr_freq_seg0_idx = vht_seg0_idx;
2907 	iface->conf->vht_oper_centr_freq_seg1_idx = vht_seg1_idx;
2908 	iface->conf->vht_oper_chwidth = vht_bw;
2909 	iface->conf->ieee80211n = freq_params->ht_enabled;
2910 	iface->conf->ieee80211ac = freq_params->vht_enabled;
2911 
2912 	/*
2913 	 * cs_params must not be cleared earlier because the freq_params
2914 	 * argument may actually point to one of these.
2915 	 */
2916 	for (i = 0; i < iface->num_bss; i++)
2917 		hostapd_cleanup_cs_params(iface->bss[i]);
2918 
2919 	hostapd_disable_iface(iface);
2920 	hostapd_enable_iface(iface);
2921 }
2922 
2923 
2924 struct hostapd_data * hostapd_get_iface(struct hapd_interfaces *interfaces,
2925 					const char *ifname)
2926 {
2927 	size_t i, j;
2928 
2929 	for (i = 0; i < interfaces->count; i++) {
2930 		struct hostapd_iface *iface = interfaces->iface[i];
2931 
2932 		for (j = 0; j < iface->num_bss; j++) {
2933 			struct hostapd_data *hapd = iface->bss[j];
2934 
2935 			if (os_strcmp(ifname, hapd->conf->iface) == 0)
2936 				return hapd;
2937 		}
2938 	}
2939 
2940 	return NULL;
2941 }
2942 
2943 #endif /* NEED_AP_MLME */
2944 
2945 
2946 void hostapd_periodic_iface(struct hostapd_iface *iface)
2947 {
2948 	size_t i;
2949 
2950 	ap_list_timer(iface);
2951 
2952 	for (i = 0; i < iface->num_bss; i++) {
2953 		struct hostapd_data *hapd = iface->bss[i];
2954 
2955 		if (!hapd->started)
2956 			continue;
2957 
2958 #ifndef CONFIG_NO_RADIUS
2959 		hostapd_acl_expire(hapd);
2960 #endif /* CONFIG_NO_RADIUS */
2961 	}
2962 }
2963