1 /*
2 * hostapd / Configuration helper functions
3 * Copyright (c) 2003-2014, 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 "crypto/sha1.h"
13 #include "radius/radius_client.h"
14 #include "common/ieee802_11_defs.h"
15 #include "common/eapol_common.h"
16 #include "eap_common/eap_wsc_common.h"
17 #include "eap_server/eap.h"
18 #include "wpa_auth.h"
19 #include "sta_info.h"
20 #include "ap_config.h"
21
22
hostapd_config_free_vlan(struct hostapd_bss_config * bss)23 static void hostapd_config_free_vlan(struct hostapd_bss_config *bss)
24 {
25 struct hostapd_vlan *vlan, *prev;
26
27 vlan = bss->vlan;
28 prev = NULL;
29 while (vlan) {
30 prev = vlan;
31 vlan = vlan->next;
32 os_free(prev);
33 }
34
35 bss->vlan = NULL;
36 }
37
38
hostapd_config_defaults_bss(struct hostapd_bss_config * bss)39 void hostapd_config_defaults_bss(struct hostapd_bss_config *bss)
40 {
41 bss->logger_syslog_level = HOSTAPD_LEVEL_INFO;
42 bss->logger_stdout_level = HOSTAPD_LEVEL_INFO;
43 bss->logger_syslog = (unsigned int) -1;
44 bss->logger_stdout = (unsigned int) -1;
45
46 bss->auth_algs = WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED;
47
48 bss->wep_rekeying_period = 300;
49 /* use key0 in individual key and key1 in broadcast key */
50 bss->broadcast_key_idx_min = 1;
51 bss->broadcast_key_idx_max = 2;
52 bss->eap_reauth_period = 3600;
53
54 bss->wpa_group_rekey = 600;
55 bss->wpa_gmk_rekey = 86400;
56 bss->wpa_key_mgmt = WPA_KEY_MGMT_PSK;
57 bss->wpa_pairwise = WPA_CIPHER_TKIP;
58 bss->wpa_group = WPA_CIPHER_TKIP;
59 bss->rsn_pairwise = 0;
60
61 bss->max_num_sta = MAX_STA_COUNT;
62
63 bss->dtim_period = 2;
64
65 bss->radius_server_auth_port = 1812;
66 bss->ap_max_inactivity = AP_MAX_INACTIVITY;
67 bss->eapol_version = EAPOL_VERSION;
68
69 bss->max_listen_interval = 65535;
70
71 bss->pwd_group = 19; /* ECC: GF(p=256) */
72
73 #ifdef CONFIG_IEEE80211W
74 bss->assoc_sa_query_max_timeout = 1000;
75 bss->assoc_sa_query_retry_timeout = 201;
76 bss->group_mgmt_cipher = WPA_CIPHER_AES_128_CMAC;
77 #endif /* CONFIG_IEEE80211W */
78 #ifdef EAP_SERVER_FAST
79 /* both anonymous and authenticated provisioning */
80 bss->eap_fast_prov = 3;
81 bss->pac_key_lifetime = 7 * 24 * 60 * 60;
82 bss->pac_key_refresh_time = 1 * 24 * 60 * 60;
83 #endif /* EAP_SERVER_FAST */
84
85 /* Set to -1 as defaults depends on HT in setup */
86 bss->wmm_enabled = -1;
87
88 #ifdef CONFIG_IEEE80211R
89 bss->ft_over_ds = 1;
90 #endif /* CONFIG_IEEE80211R */
91
92 bss->radius_das_time_window = 300;
93
94 bss->sae_anti_clogging_threshold = 5;
95 }
96
97
hostapd_config_defaults(void)98 struct hostapd_config * hostapd_config_defaults(void)
99 {
100 #define ecw2cw(ecw) ((1 << (ecw)) - 1)
101
102 struct hostapd_config *conf;
103 struct hostapd_bss_config *bss;
104 const int aCWmin = 4, aCWmax = 10;
105 const struct hostapd_wmm_ac_params ac_bk =
106 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */
107 const struct hostapd_wmm_ac_params ac_be =
108 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */
109 const struct hostapd_wmm_ac_params ac_vi = /* video traffic */
110 { aCWmin - 1, aCWmin, 2, 3008 / 32, 0 };
111 const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */
112 { aCWmin - 2, aCWmin - 1, 2, 1504 / 32, 0 };
113 const struct hostapd_tx_queue_params txq_bk =
114 { 7, ecw2cw(aCWmin), ecw2cw(aCWmax), 0 };
115 const struct hostapd_tx_queue_params txq_be =
116 { 3, ecw2cw(aCWmin), 4 * (ecw2cw(aCWmin) + 1) - 1, 0};
117 const struct hostapd_tx_queue_params txq_vi =
118 { 1, (ecw2cw(aCWmin) + 1) / 2 - 1, ecw2cw(aCWmin), 30};
119 const struct hostapd_tx_queue_params txq_vo =
120 { 1, (ecw2cw(aCWmin) + 1) / 4 - 1,
121 (ecw2cw(aCWmin) + 1) / 2 - 1, 15};
122
123 #undef ecw2cw
124
125 conf = os_zalloc(sizeof(*conf));
126 bss = os_zalloc(sizeof(*bss));
127 if (conf == NULL || bss == NULL) {
128 wpa_printf(MSG_ERROR, "Failed to allocate memory for "
129 "configuration data.");
130 os_free(conf);
131 os_free(bss);
132 return NULL;
133 }
134 conf->bss = os_calloc(1, sizeof(struct hostapd_bss_config *));
135 if (conf->bss == NULL) {
136 os_free(conf);
137 os_free(bss);
138 return NULL;
139 }
140 conf->bss[0] = bss;
141
142 bss->radius = os_zalloc(sizeof(*bss->radius));
143 if (bss->radius == NULL) {
144 os_free(conf->bss);
145 os_free(conf);
146 os_free(bss);
147 return NULL;
148 }
149
150 hostapd_config_defaults_bss(bss);
151
152 conf->num_bss = 1;
153
154 conf->beacon_int = 100;
155 conf->rts_threshold = -1; /* use driver default: 2347 */
156 conf->fragm_threshold = -1; /* user driver default: 2346 */
157 conf->send_probe_response = 1;
158 /* Set to invalid value means do not add Power Constraint IE */
159 conf->local_pwr_constraint = -1;
160
161 conf->wmm_ac_params[0] = ac_be;
162 conf->wmm_ac_params[1] = ac_bk;
163 conf->wmm_ac_params[2] = ac_vi;
164 conf->wmm_ac_params[3] = ac_vo;
165
166 conf->tx_queue[0] = txq_vo;
167 conf->tx_queue[1] = txq_vi;
168 conf->tx_queue[2] = txq_be;
169 conf->tx_queue[3] = txq_bk;
170
171 conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED;
172
173 conf->ap_table_max_size = 255;
174 conf->ap_table_expiration_time = 60;
175
176 #ifdef CONFIG_TESTING_OPTIONS
177 conf->ignore_probe_probability = 0.0;
178 conf->ignore_auth_probability = 0.0;
179 conf->ignore_assoc_probability = 0.0;
180 conf->ignore_reassoc_probability = 0.0;
181 conf->corrupt_gtk_rekey_mic_probability = 0.0;
182 #endif /* CONFIG_TESTING_OPTIONS */
183
184 conf->acs = 0;
185 conf->acs_ch_list.num = 0;
186 #ifdef CONFIG_ACS
187 conf->acs_num_scans = 5;
188 #endif /* CONFIG_ACS */
189
190 return conf;
191 }
192
193
hostapd_mac_comp(const void * a,const void * b)194 int hostapd_mac_comp(const void *a, const void *b)
195 {
196 return os_memcmp(a, b, sizeof(macaddr));
197 }
198
199
hostapd_mac_comp_empty(const void * a)200 int hostapd_mac_comp_empty(const void *a)
201 {
202 macaddr empty = { 0 };
203 return os_memcmp(a, empty, sizeof(macaddr));
204 }
205
206
hostapd_config_read_wpa_psk(const char * fname,struct hostapd_ssid * ssid)207 static int hostapd_config_read_wpa_psk(const char *fname,
208 struct hostapd_ssid *ssid)
209 {
210 FILE *f;
211 char buf[128], *pos;
212 int line = 0, ret = 0, len, ok;
213 u8 addr[ETH_ALEN];
214 struct hostapd_wpa_psk *psk;
215
216 if (!fname)
217 return 0;
218
219 f = fopen(fname, "r");
220 if (!f) {
221 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname);
222 return -1;
223 }
224
225 while (fgets(buf, sizeof(buf), f)) {
226 line++;
227
228 if (buf[0] == '#')
229 continue;
230 pos = buf;
231 while (*pos != '\0') {
232 if (*pos == '\n') {
233 *pos = '\0';
234 break;
235 }
236 pos++;
237 }
238 if (buf[0] == '\0')
239 continue;
240
241 if (hwaddr_aton(buf, addr)) {
242 wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on "
243 "line %d in '%s'", buf, line, fname);
244 ret = -1;
245 break;
246 }
247
248 psk = os_zalloc(sizeof(*psk));
249 if (psk == NULL) {
250 wpa_printf(MSG_ERROR, "WPA PSK allocation failed");
251 ret = -1;
252 break;
253 }
254 if (is_zero_ether_addr(addr))
255 psk->group = 1;
256 else
257 os_memcpy(psk->addr, addr, ETH_ALEN);
258
259 pos = buf + 17;
260 if (*pos == '\0') {
261 wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'",
262 line, fname);
263 os_free(psk);
264 ret = -1;
265 break;
266 }
267 pos++;
268
269 ok = 0;
270 len = os_strlen(pos);
271 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0)
272 ok = 1;
273 else if (len >= 8 && len < 64) {
274 pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len,
275 4096, psk->psk, PMK_LEN);
276 ok = 1;
277 }
278 if (!ok) {
279 wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in "
280 "'%s'", pos, line, fname);
281 os_free(psk);
282 ret = -1;
283 break;
284 }
285
286 psk->next = ssid->wpa_psk;
287 ssid->wpa_psk = psk;
288 }
289
290 fclose(f);
291
292 return ret;
293 }
294
295
hostapd_derive_psk(struct hostapd_ssid * ssid)296 static int hostapd_derive_psk(struct hostapd_ssid *ssid)
297 {
298 ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
299 if (ssid->wpa_psk == NULL) {
300 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK");
301 return -1;
302 }
303 wpa_hexdump_ascii(MSG_DEBUG, "SSID",
304 (u8 *) ssid->ssid, ssid->ssid_len);
305 wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)",
306 (u8 *) ssid->wpa_passphrase,
307 os_strlen(ssid->wpa_passphrase));
308 pbkdf2_sha1(ssid->wpa_passphrase,
309 ssid->ssid, ssid->ssid_len,
310 4096, ssid->wpa_psk->psk, PMK_LEN);
311 wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)",
312 ssid->wpa_psk->psk, PMK_LEN);
313 return 0;
314 }
315
316
hostapd_setup_wpa_psk(struct hostapd_bss_config * conf)317 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf)
318 {
319 struct hostapd_ssid *ssid = &conf->ssid;
320
321 if (ssid->wpa_passphrase != NULL) {
322 if (ssid->wpa_psk != NULL) {
323 wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK "
324 "instead of passphrase");
325 } else {
326 wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on "
327 "passphrase");
328 if (hostapd_derive_psk(ssid) < 0)
329 return -1;
330 }
331 ssid->wpa_psk->group = 1;
332 }
333
334 if (ssid->wpa_psk_file) {
335 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file,
336 &conf->ssid))
337 return -1;
338 }
339
340 return 0;
341 }
342
343
hostapd_config_free_radius(struct hostapd_radius_server * servers,int num_servers)344 static void hostapd_config_free_radius(struct hostapd_radius_server *servers,
345 int num_servers)
346 {
347 int i;
348
349 for (i = 0; i < num_servers; i++) {
350 os_free(servers[i].shared_secret);
351 }
352 os_free(servers);
353 }
354
355
356 struct hostapd_radius_attr *
hostapd_config_get_radius_attr(struct hostapd_radius_attr * attr,u8 type)357 hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type)
358 {
359 for (; attr; attr = attr->next) {
360 if (attr->type == type)
361 return attr;
362 }
363 return NULL;
364 }
365
366
hostapd_config_free_radius_attr(struct hostapd_radius_attr * attr)367 static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr)
368 {
369 struct hostapd_radius_attr *prev;
370
371 while (attr) {
372 prev = attr;
373 attr = attr->next;
374 wpabuf_free(prev->val);
375 os_free(prev);
376 }
377 }
378
379
hostapd_config_free_eap_user(struct hostapd_eap_user * user)380 void hostapd_config_free_eap_user(struct hostapd_eap_user *user)
381 {
382 hostapd_config_free_radius_attr(user->accept_attr);
383 os_free(user->identity);
384 bin_clear_free(user->password, user->password_len);
385 os_free(user);
386 }
387
388
hostapd_config_free_wep(struct hostapd_wep_keys * keys)389 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys)
390 {
391 int i;
392 for (i = 0; i < NUM_WEP_KEYS; i++) {
393 bin_clear_free(keys->key[i], keys->len[i]);
394 keys->key[i] = NULL;
395 }
396 }
397
398
hostapd_config_clear_wpa_psk(struct hostapd_wpa_psk ** l)399 void hostapd_config_clear_wpa_psk(struct hostapd_wpa_psk **l)
400 {
401 struct hostapd_wpa_psk *psk, *tmp;
402
403 for (psk = *l; psk;) {
404 tmp = psk;
405 psk = psk->next;
406 bin_clear_free(tmp, sizeof(*tmp));
407 }
408 *l = NULL;
409 }
410
411
hostapd_config_free_bss(struct hostapd_bss_config * conf)412 void hostapd_config_free_bss(struct hostapd_bss_config *conf)
413 {
414 struct hostapd_eap_user *user, *prev_user;
415
416 if (conf == NULL)
417 return;
418
419 hostapd_config_clear_wpa_psk(&conf->ssid.wpa_psk);
420
421 str_clear_free(conf->ssid.wpa_passphrase);
422 os_free(conf->ssid.wpa_psk_file);
423 hostapd_config_free_wep(&conf->ssid.wep);
424 #ifdef CONFIG_FULL_DYNAMIC_VLAN
425 os_free(conf->ssid.vlan_tagged_interface);
426 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
427
428 user = conf->eap_user;
429 while (user) {
430 prev_user = user;
431 user = user->next;
432 hostapd_config_free_eap_user(prev_user);
433 }
434 os_free(conf->eap_user_sqlite);
435
436 os_free(conf->eap_req_id_text);
437 os_free(conf->erp_domain);
438 os_free(conf->accept_mac);
439 os_free(conf->deny_mac);
440 os_free(conf->nas_identifier);
441 if (conf->radius) {
442 hostapd_config_free_radius(conf->radius->auth_servers,
443 conf->radius->num_auth_servers);
444 hostapd_config_free_radius(conf->radius->acct_servers,
445 conf->radius->num_acct_servers);
446 }
447 hostapd_config_free_radius_attr(conf->radius_auth_req_attr);
448 hostapd_config_free_radius_attr(conf->radius_acct_req_attr);
449 os_free(conf->rsn_preauth_interfaces);
450 os_free(conf->ctrl_interface);
451 os_free(conf->ca_cert);
452 os_free(conf->server_cert);
453 os_free(conf->private_key);
454 os_free(conf->private_key_passwd);
455 os_free(conf->ocsp_stapling_response);
456 os_free(conf->dh_file);
457 os_free(conf->openssl_ciphers);
458 os_free(conf->pac_opaque_encr_key);
459 os_free(conf->eap_fast_a_id);
460 os_free(conf->eap_fast_a_id_info);
461 os_free(conf->eap_sim_db);
462 os_free(conf->radius_server_clients);
463 os_free(conf->radius);
464 os_free(conf->radius_das_shared_secret);
465 hostapd_config_free_vlan(conf);
466 os_free(conf->time_zone);
467
468 #ifdef CONFIG_IEEE80211R
469 {
470 struct ft_remote_r0kh *r0kh, *r0kh_prev;
471 struct ft_remote_r1kh *r1kh, *r1kh_prev;
472
473 r0kh = conf->r0kh_list;
474 conf->r0kh_list = NULL;
475 while (r0kh) {
476 r0kh_prev = r0kh;
477 r0kh = r0kh->next;
478 os_free(r0kh_prev);
479 }
480
481 r1kh = conf->r1kh_list;
482 conf->r1kh_list = NULL;
483 while (r1kh) {
484 r1kh_prev = r1kh;
485 r1kh = r1kh->next;
486 os_free(r1kh_prev);
487 }
488 }
489 #endif /* CONFIG_IEEE80211R */
490
491 #ifdef CONFIG_WPS
492 os_free(conf->wps_pin_requests);
493 os_free(conf->device_name);
494 os_free(conf->manufacturer);
495 os_free(conf->model_name);
496 os_free(conf->model_number);
497 os_free(conf->serial_number);
498 os_free(conf->config_methods);
499 os_free(conf->ap_pin);
500 os_free(conf->extra_cred);
501 os_free(conf->ap_settings);
502 os_free(conf->upnp_iface);
503 os_free(conf->friendly_name);
504 os_free(conf->manufacturer_url);
505 os_free(conf->model_description);
506 os_free(conf->model_url);
507 os_free(conf->upc);
508 {
509 unsigned int i;
510
511 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++)
512 wpabuf_free(conf->wps_vendor_ext[i]);
513 }
514 wpabuf_free(conf->wps_nfc_dh_pubkey);
515 wpabuf_free(conf->wps_nfc_dh_privkey);
516 wpabuf_free(conf->wps_nfc_dev_pw);
517 #endif /* CONFIG_WPS */
518
519 os_free(conf->roaming_consortium);
520 os_free(conf->venue_name);
521 os_free(conf->nai_realm_data);
522 os_free(conf->network_auth_type);
523 os_free(conf->anqp_3gpp_cell_net);
524 os_free(conf->domain_name);
525
526 #ifdef CONFIG_RADIUS_TEST
527 os_free(conf->dump_msk_file);
528 #endif /* CONFIG_RADIUS_TEST */
529
530 #ifdef CONFIG_HS20
531 os_free(conf->hs20_oper_friendly_name);
532 os_free(conf->hs20_wan_metrics);
533 os_free(conf->hs20_connection_capability);
534 os_free(conf->hs20_operating_class);
535 os_free(conf->hs20_icons);
536 if (conf->hs20_osu_providers) {
537 size_t i;
538 for (i = 0; i < conf->hs20_osu_providers_count; i++) {
539 struct hs20_osu_provider *p;
540 size_t j;
541 p = &conf->hs20_osu_providers[i];
542 os_free(p->friendly_name);
543 os_free(p->server_uri);
544 os_free(p->method_list);
545 for (j = 0; j < p->icons_count; j++)
546 os_free(p->icons[j]);
547 os_free(p->icons);
548 os_free(p->osu_nai);
549 os_free(p->service_desc);
550 }
551 os_free(conf->hs20_osu_providers);
552 }
553 os_free(conf->subscr_remediation_url);
554 #endif /* CONFIG_HS20 */
555
556 wpabuf_free(conf->vendor_elements);
557
558 os_free(conf->sae_groups);
559
560 os_free(conf->wowlan_triggers);
561
562 os_free(conf->server_id);
563
564 os_free(conf);
565 }
566
567
568 /**
569 * hostapd_config_free - Free hostapd configuration
570 * @conf: Configuration data from hostapd_config_read().
571 */
hostapd_config_free(struct hostapd_config * conf)572 void hostapd_config_free(struct hostapd_config *conf)
573 {
574 size_t i;
575
576 if (conf == NULL)
577 return;
578
579 for (i = 0; i < conf->num_bss; i++)
580 hostapd_config_free_bss(conf->bss[i]);
581 os_free(conf->bss);
582 os_free(conf->supported_rates);
583 os_free(conf->basic_rates);
584 os_free(conf->acs_ch_list.range);
585 os_free(conf->driver_params);
586 #ifdef CONFIG_ACS
587 os_free(conf->acs_chan_bias);
588 #endif /* CONFIG_ACS */
589
590 os_free(conf);
591 }
592
593
594 /**
595 * hostapd_maclist_found - Find a MAC address from a list
596 * @list: MAC address list
597 * @num_entries: Number of addresses in the list
598 * @addr: Address to search for
599 * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed
600 * Returns: 1 if address is in the list or 0 if not.
601 *
602 * Perform a binary search for given MAC address from a pre-sorted list.
603 */
hostapd_maclist_found(struct mac_acl_entry * list,int num_entries,const u8 * addr,int * vlan_id)604 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries,
605 const u8 *addr, int *vlan_id)
606 {
607 int start, end, middle, res;
608
609 start = 0;
610 end = num_entries - 1;
611
612 while (start <= end) {
613 middle = (start + end) / 2;
614 res = os_memcmp(list[middle].addr, addr, ETH_ALEN);
615 if (res == 0) {
616 if (vlan_id)
617 *vlan_id = list[middle].vlan_id;
618 return 1;
619 }
620 if (res < 0)
621 start = middle + 1;
622 else
623 end = middle - 1;
624 }
625
626 return 0;
627 }
628
629
hostapd_rate_found(int * list,int rate)630 int hostapd_rate_found(int *list, int rate)
631 {
632 int i;
633
634 if (list == NULL)
635 return 0;
636
637 for (i = 0; list[i] >= 0; i++)
638 if (list[i] == rate)
639 return 1;
640
641 return 0;
642 }
643
644
hostapd_vlan_id_valid(struct hostapd_vlan * vlan,int vlan_id)645 int hostapd_vlan_id_valid(struct hostapd_vlan *vlan, int vlan_id)
646 {
647 struct hostapd_vlan *v = vlan;
648 while (v) {
649 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD)
650 return 1;
651 v = v->next;
652 }
653 return 0;
654 }
655
656
hostapd_get_vlan_id_ifname(struct hostapd_vlan * vlan,int vlan_id)657 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id)
658 {
659 struct hostapd_vlan *v = vlan;
660 while (v) {
661 if (v->vlan_id == vlan_id)
662 return v->ifname;
663 v = v->next;
664 }
665 return NULL;
666 }
667
668
hostapd_get_psk(const struct hostapd_bss_config * conf,const u8 * addr,const u8 * p2p_dev_addr,const u8 * prev_psk)669 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf,
670 const u8 *addr, const u8 *p2p_dev_addr,
671 const u8 *prev_psk)
672 {
673 struct hostapd_wpa_psk *psk;
674 int next_ok = prev_psk == NULL;
675
676 if (p2p_dev_addr && !is_zero_ether_addr(p2p_dev_addr)) {
677 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
678 " p2p_dev_addr=" MACSTR " prev_psk=%p",
679 MAC2STR(addr), MAC2STR(p2p_dev_addr), prev_psk);
680 addr = NULL; /* Use P2P Device Address for matching */
681 } else {
682 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
683 " prev_psk=%p",
684 MAC2STR(addr), prev_psk);
685 }
686
687 for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) {
688 if (next_ok &&
689 (psk->group ||
690 (addr && os_memcmp(psk->addr, addr, ETH_ALEN) == 0) ||
691 (!addr && p2p_dev_addr &&
692 os_memcmp(psk->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
693 0)))
694 return psk->psk;
695
696 if (psk->psk == prev_psk)
697 next_ok = 1;
698 }
699
700 return NULL;
701 }
702
703
hostapd_config_check_bss(struct hostapd_bss_config * bss,struct hostapd_config * conf,int full_config)704 static int hostapd_config_check_bss(struct hostapd_bss_config *bss,
705 struct hostapd_config *conf,
706 int full_config)
707 {
708 if (full_config && bss->ieee802_1x && !bss->eap_server &&
709 !bss->radius->auth_servers) {
710 wpa_printf(MSG_ERROR, "Invalid IEEE 802.1X configuration (no "
711 "EAP authenticator configured).");
712 return -1;
713 }
714
715 if (bss->wpa) {
716 int wep, i;
717
718 wep = bss->default_wep_key_len > 0 ||
719 bss->individual_wep_key_len > 0;
720 for (i = 0; i < NUM_WEP_KEYS; i++) {
721 if (bss->ssid.wep.keys_set) {
722 wep = 1;
723 break;
724 }
725 }
726
727 if (wep) {
728 wpa_printf(MSG_ERROR, "WEP configuration in a WPA network is not supported");
729 return -1;
730 }
731 }
732
733 if (full_config && bss->wpa &&
734 bss->wpa_psk_radius != PSK_RADIUS_IGNORED &&
735 bss->macaddr_acl != USE_EXTERNAL_RADIUS_AUTH) {
736 wpa_printf(MSG_ERROR, "WPA-PSK using RADIUS enabled, but no "
737 "RADIUS checking (macaddr_acl=2) enabled.");
738 return -1;
739 }
740
741 if (full_config && bss->wpa && (bss->wpa_key_mgmt & WPA_KEY_MGMT_PSK) &&
742 bss->ssid.wpa_psk == NULL && bss->ssid.wpa_passphrase == NULL &&
743 bss->ssid.wpa_psk_file == NULL &&
744 (bss->wpa_psk_radius != PSK_RADIUS_REQUIRED ||
745 bss->macaddr_acl != USE_EXTERNAL_RADIUS_AUTH)) {
746 wpa_printf(MSG_ERROR, "WPA-PSK enabled, but PSK or passphrase "
747 "is not configured.");
748 return -1;
749 }
750
751 if (full_config && hostapd_mac_comp_empty(bss->bssid) != 0) {
752 size_t i;
753
754 for (i = 0; i < conf->num_bss; i++) {
755 if (conf->bss[i] != bss &&
756 (hostapd_mac_comp(conf->bss[i]->bssid,
757 bss->bssid) == 0)) {
758 wpa_printf(MSG_ERROR, "Duplicate BSSID " MACSTR
759 " on interface '%s' and '%s'.",
760 MAC2STR(bss->bssid),
761 conf->bss[i]->iface, bss->iface);
762 return -1;
763 }
764 }
765 }
766
767 #ifdef CONFIG_IEEE80211R
768 if (full_config && wpa_key_mgmt_ft(bss->wpa_key_mgmt) &&
769 (bss->nas_identifier == NULL ||
770 os_strlen(bss->nas_identifier) < 1 ||
771 os_strlen(bss->nas_identifier) > FT_R0KH_ID_MAX_LEN)) {
772 wpa_printf(MSG_ERROR, "FT (IEEE 802.11r) requires "
773 "nas_identifier to be configured as a 1..48 octet "
774 "string");
775 return -1;
776 }
777 #endif /* CONFIG_IEEE80211R */
778
779 #ifdef CONFIG_IEEE80211N
780 if (full_config && conf->ieee80211n &&
781 conf->hw_mode == HOSTAPD_MODE_IEEE80211B) {
782 bss->disable_11n = 1;
783 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) in 11b mode is not "
784 "allowed, disabling HT capabilities");
785 }
786
787 if (full_config && conf->ieee80211n &&
788 bss->ssid.security_policy == SECURITY_STATIC_WEP) {
789 bss->disable_11n = 1;
790 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) with WEP is not "
791 "allowed, disabling HT capabilities");
792 }
793
794 if (full_config && conf->ieee80211n && bss->wpa &&
795 !(bss->wpa_pairwise & WPA_CIPHER_CCMP) &&
796 !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP |
797 WPA_CIPHER_CCMP_256 | WPA_CIPHER_GCMP_256)))
798 {
799 bss->disable_11n = 1;
800 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) with WPA/WPA2 "
801 "requires CCMP/GCMP to be enabled, disabling HT "
802 "capabilities");
803 }
804 #endif /* CONFIG_IEEE80211N */
805
806 #ifdef CONFIG_WPS
807 if (full_config && bss->wps_state && bss->ignore_broadcast_ssid) {
808 wpa_printf(MSG_INFO, "WPS: ignore_broadcast_ssid "
809 "configuration forced WPS to be disabled");
810 bss->wps_state = 0;
811 }
812
813 if (full_config && bss->wps_state &&
814 bss->ssid.wep.keys_set && bss->wpa == 0) {
815 wpa_printf(MSG_INFO, "WPS: WEP configuration forced WPS to be "
816 "disabled");
817 bss->wps_state = 0;
818 }
819
820 if (full_config && bss->wps_state && bss->wpa &&
821 (!(bss->wpa & 2) ||
822 !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)))) {
823 wpa_printf(MSG_INFO, "WPS: WPA/TKIP configuration without "
824 "WPA2/CCMP/GCMP forced WPS to be disabled");
825 bss->wps_state = 0;
826 }
827 #endif /* CONFIG_WPS */
828
829 #ifdef CONFIG_HS20
830 if (full_config && bss->hs20 &&
831 (!(bss->wpa & 2) ||
832 !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP |
833 WPA_CIPHER_CCMP_256 |
834 WPA_CIPHER_GCMP_256)))) {
835 wpa_printf(MSG_ERROR, "HS 2.0: WPA2-Enterprise/CCMP "
836 "configuration is required for Hotspot 2.0 "
837 "functionality");
838 return -1;
839 }
840 #endif /* CONFIG_HS20 */
841
842 return 0;
843 }
844
845
hostapd_config_check_cw(struct hostapd_config * conf,int queue)846 static int hostapd_config_check_cw(struct hostapd_config *conf, int queue)
847 {
848 int tx_cwmin = conf->tx_queue[queue].cwmin;
849 int tx_cwmax = conf->tx_queue[queue].cwmax;
850 int ac_cwmin = conf->wmm_ac_params[queue].cwmin;
851 int ac_cwmax = conf->wmm_ac_params[queue].cwmax;
852
853 if (tx_cwmin > tx_cwmax) {
854 wpa_printf(MSG_ERROR,
855 "Invalid TX queue cwMin/cwMax values. cwMin(%d) greater than cwMax(%d)",
856 tx_cwmin, tx_cwmax);
857 return -1;
858 }
859 if (ac_cwmin > ac_cwmax) {
860 wpa_printf(MSG_ERROR,
861 "Invalid WMM AC cwMin/cwMax values. cwMin(%d) greater than cwMax(%d)",
862 ac_cwmin, ac_cwmax);
863 return -1;
864 }
865 return 0;
866 }
867
868
hostapd_config_check(struct hostapd_config * conf,int full_config)869 int hostapd_config_check(struct hostapd_config *conf, int full_config)
870 {
871 size_t i;
872
873 if (full_config && conf->ieee80211d &&
874 (!conf->country[0] || !conf->country[1])) {
875 wpa_printf(MSG_ERROR, "Cannot enable IEEE 802.11d without "
876 "setting the country_code");
877 return -1;
878 }
879
880 if (full_config && conf->ieee80211h && !conf->ieee80211d) {
881 wpa_printf(MSG_ERROR, "Cannot enable IEEE 802.11h without "
882 "IEEE 802.11d enabled");
883 return -1;
884 }
885
886 if (full_config && conf->local_pwr_constraint != -1 &&
887 !conf->ieee80211d) {
888 wpa_printf(MSG_ERROR, "Cannot add Power Constraint element without Country element");
889 return -1;
890 }
891
892 if (full_config && conf->spectrum_mgmt_required &&
893 conf->local_pwr_constraint == -1) {
894 wpa_printf(MSG_ERROR, "Cannot set Spectrum Management bit without Country and Power Constraint elements");
895 return -1;
896 }
897
898 for (i = 0; i < NUM_TX_QUEUES; i++) {
899 if (hostapd_config_check_cw(conf, i))
900 return -1;
901 }
902
903 for (i = 0; i < conf->num_bss; i++) {
904 if (hostapd_config_check_bss(conf->bss[i], conf, full_config))
905 return -1;
906 }
907
908 return 0;
909 }
910
911
hostapd_set_security_params(struct hostapd_bss_config * bss,int full_config)912 void hostapd_set_security_params(struct hostapd_bss_config *bss,
913 int full_config)
914 {
915 if (bss->individual_wep_key_len == 0) {
916 /* individual keys are not use; can use key idx0 for
917 * broadcast keys */
918 bss->broadcast_key_idx_min = 0;
919 }
920
921 if ((bss->wpa & 2) && bss->rsn_pairwise == 0)
922 bss->rsn_pairwise = bss->wpa_pairwise;
923 bss->wpa_group = wpa_select_ap_group_cipher(bss->wpa, bss->wpa_pairwise,
924 bss->rsn_pairwise);
925
926 if (full_config) {
927 bss->radius->auth_server = bss->radius->auth_servers;
928 bss->radius->acct_server = bss->radius->acct_servers;
929 }
930
931 if (bss->wpa && bss->ieee802_1x) {
932 bss->ssid.security_policy = SECURITY_WPA;
933 } else if (bss->wpa) {
934 bss->ssid.security_policy = SECURITY_WPA_PSK;
935 } else if (bss->ieee802_1x) {
936 int cipher = WPA_CIPHER_NONE;
937 bss->ssid.security_policy = SECURITY_IEEE_802_1X;
938 bss->ssid.wep.default_len = bss->default_wep_key_len;
939 if (full_config && bss->default_wep_key_len) {
940 cipher = bss->default_wep_key_len >= 13 ?
941 WPA_CIPHER_WEP104 : WPA_CIPHER_WEP40;
942 } else if (full_config && bss->ssid.wep.keys_set) {
943 if (bss->ssid.wep.len[0] >= 13)
944 cipher = WPA_CIPHER_WEP104;
945 else
946 cipher = WPA_CIPHER_WEP40;
947 }
948 bss->wpa_group = cipher;
949 bss->wpa_pairwise = cipher;
950 bss->rsn_pairwise = cipher;
951 if (full_config)
952 bss->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
953 } else if (bss->ssid.wep.keys_set) {
954 int cipher = WPA_CIPHER_WEP40;
955 if (bss->ssid.wep.len[0] >= 13)
956 cipher = WPA_CIPHER_WEP104;
957 bss->ssid.security_policy = SECURITY_STATIC_WEP;
958 bss->wpa_group = cipher;
959 bss->wpa_pairwise = cipher;
960 bss->rsn_pairwise = cipher;
961 if (full_config)
962 bss->wpa_key_mgmt = WPA_KEY_MGMT_NONE;
963 } else if (bss->osen) {
964 bss->ssid.security_policy = SECURITY_OSEN;
965 bss->wpa_group = WPA_CIPHER_CCMP;
966 bss->wpa_pairwise = 0;
967 bss->rsn_pairwise = WPA_CIPHER_CCMP;
968 } else {
969 bss->ssid.security_policy = SECURITY_PLAINTEXT;
970 bss->wpa_group = WPA_CIPHER_NONE;
971 bss->wpa_pairwise = WPA_CIPHER_NONE;
972 bss->rsn_pairwise = WPA_CIPHER_NONE;
973 if (full_config)
974 bss->wpa_key_mgmt = WPA_KEY_MGMT_NONE;
975 }
976 }
977