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