xref: /freebsd/contrib/wpa/wpa_supplicant/interworking.c (revision cddbc3b40812213ff00041f79174cac0be360a2a)
1 /*
2  * Interworking (IEEE 802.11u)
3  * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
4  * Copyright (c) 2011-2014, Jouni Malinen <j@w1.fi>
5  *
6  * This software may be distributed under the terms of the BSD license.
7  * See README for more details.
8  */
9 
10 #include "includes.h"
11 
12 #include "common.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/gas.h"
15 #include "common/wpa_ctrl.h"
16 #include "utils/pcsc_funcs.h"
17 #include "utils/eloop.h"
18 #include "drivers/driver.h"
19 #include "eap_common/eap_defs.h"
20 #include "eap_peer/eap.h"
21 #include "eap_peer/eap_methods.h"
22 #include "eapol_supp/eapol_supp_sm.h"
23 #include "rsn_supp/wpa.h"
24 #include "wpa_supplicant_i.h"
25 #include "config.h"
26 #include "config_ssid.h"
27 #include "bss.h"
28 #include "scan.h"
29 #include "notify.h"
30 #include "driver_i.h"
31 #include "gas_query.h"
32 #include "hs20_supplicant.h"
33 #include "interworking.h"
34 
35 
36 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
37 #define INTERWORKING_3GPP
38 #else
39 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
40 #define INTERWORKING_3GPP
41 #else
42 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
43 #define INTERWORKING_3GPP
44 #endif
45 #endif
46 #endif
47 
48 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
49 static struct wpa_cred * interworking_credentials_available_realm(
50 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
51 	int *excluded);
52 static struct wpa_cred * interworking_credentials_available_3gpp(
53 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
54 	int *excluded);
55 
56 
57 static int cred_prio_cmp(const struct wpa_cred *a, const struct wpa_cred *b)
58 {
59 	if (a->priority > b->priority)
60 		return 1;
61 	if (a->priority < b->priority)
62 		return -1;
63 	if (a->provisioning_sp == NULL || b->provisioning_sp == NULL ||
64 	    os_strcmp(a->provisioning_sp, b->provisioning_sp) != 0)
65 		return 0;
66 	if (a->sp_priority < b->sp_priority)
67 		return 1;
68 	if (a->sp_priority > b->sp_priority)
69 		return -1;
70 	return 0;
71 }
72 
73 
74 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
75 {
76 	unsigned int tried;
77 
78 	if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
79 		wpa_supplicant_cancel_sched_scan(wpa_s);
80 		wpa_s->own_disconnect_req = 1;
81 		wpa_supplicant_deauthenticate(wpa_s,
82 					      WLAN_REASON_DEAUTH_LEAVING);
83 	}
84 	wpa_s->disconnected = 0;
85 	wpa_s->reassociate = 1;
86 	tried = wpa_s->interworking_fast_assoc_tried;
87 	wpa_s->interworking_fast_assoc_tried = 1;
88 
89 	if (!tried && wpa_supplicant_fast_associate(wpa_s) >= 0)
90 		return;
91 
92 	wpa_s->interworking_fast_assoc_tried = 0;
93 	wpa_supplicant_req_scan(wpa_s, 0, 0);
94 }
95 
96 
97 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
98 				      struct wpabuf *extra)
99 {
100 	struct wpabuf *buf;
101 	size_t i;
102 	u8 *len_pos;
103 
104 	buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
105 					 (extra ? wpabuf_len(extra) : 0));
106 	if (buf == NULL)
107 		return NULL;
108 
109 	if (num_ids > 0) {
110 		len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
111 		for (i = 0; i < num_ids; i++)
112 			wpabuf_put_le16(buf, info_ids[i]);
113 		gas_anqp_set_element_len(buf, len_pos);
114 	}
115 	if (extra)
116 		wpabuf_put_buf(buf, extra);
117 
118 	gas_anqp_set_len(buf);
119 
120 	return buf;
121 }
122 
123 
124 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
125 				      u8 dialog_token,
126 				      enum gas_query_result result,
127 				      const struct wpabuf *adv_proto,
128 				      const struct wpabuf *resp,
129 				      u16 status_code)
130 {
131 	struct wpa_supplicant *wpa_s = ctx;
132 
133 	wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR
134 		   " dialog_token=%u result=%d status_code=%u",
135 		   MAC2STR(dst), dialog_token, result, status_code);
136 	anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
137 		     status_code);
138 	interworking_next_anqp_fetch(wpa_s);
139 }
140 
141 
142 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
143 {
144 	struct wpa_cred *cred;
145 
146 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
147 		if (cred->roaming_consortium_len)
148 			return 1;
149 		if (cred->required_roaming_consortium_len)
150 			return 1;
151 		if (cred->num_roaming_consortiums)
152 			return 1;
153 	}
154 	return 0;
155 }
156 
157 
158 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
159 {
160 	struct wpa_cred *cred;
161 
162 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
163 		if (cred->pcsc || cred->imsi)
164 			return 1;
165 	}
166 	return 0;
167 }
168 
169 
170 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
171 {
172 	struct wpa_cred *cred;
173 
174 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
175 		if (cred->pcsc || cred->imsi)
176 			continue;
177 		if (!cred->eap_method)
178 			return 1;
179 		if (cred->realm && cred->roaming_consortium_len == 0)
180 			return 1;
181 	}
182 	return 0;
183 }
184 
185 
186 static int cred_with_domain(struct wpa_supplicant *wpa_s)
187 {
188 	struct wpa_cred *cred;
189 
190 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
191 		if (cred->domain || cred->pcsc || cred->imsi ||
192 		    cred->roaming_partner)
193 			return 1;
194 	}
195 	return 0;
196 }
197 
198 
199 #ifdef CONFIG_HS20
200 
201 static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s)
202 {
203 	struct wpa_cred *cred;
204 
205 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
206 		if (cred->min_dl_bandwidth_home ||
207 		    cred->min_ul_bandwidth_home ||
208 		    cred->min_dl_bandwidth_roaming ||
209 		    cred->min_ul_bandwidth_roaming)
210 			return 1;
211 	}
212 	return 0;
213 }
214 
215 
216 static int cred_with_conn_capab(struct wpa_supplicant *wpa_s)
217 {
218 	struct wpa_cred *cred;
219 
220 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
221 		if (cred->num_req_conn_capab)
222 			return 1;
223 	}
224 	return 0;
225 }
226 
227 #endif /* CONFIG_HS20 */
228 
229 
230 static int additional_roaming_consortiums(struct wpa_bss *bss)
231 {
232 	const u8 *ie;
233 	ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
234 	if (ie == NULL || ie[1] == 0)
235 		return 0;
236 	return ie[2]; /* Number of ANQP OIs */
237 }
238 
239 
240 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
241 {
242 	struct wpa_supplicant *wpa_s = eloop_ctx;
243 	interworking_next_anqp_fetch(wpa_s);
244 }
245 
246 
247 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
248 				      struct wpa_bss *bss)
249 {
250 	struct wpabuf *buf;
251 	int ret = 0;
252 	int res;
253 	u16 info_ids[8];
254 	size_t num_info_ids = 0;
255 	struct wpabuf *extra = NULL;
256 	int all = wpa_s->fetch_all_anqp;
257 
258 	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
259 		MAC2STR(bss->bssid));
260 	wpa_s->interworking_gas_bss = bss;
261 
262 	info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
263 	if (all) {
264 		info_ids[num_info_ids++] = ANQP_VENUE_NAME;
265 		info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
266 	}
267 	if (all || (cred_with_roaming_consortium(wpa_s) &&
268 		    additional_roaming_consortiums(bss)))
269 		info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
270 	if (all)
271 		info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
272 	if (all || cred_with_nai_realm(wpa_s))
273 		info_ids[num_info_ids++] = ANQP_NAI_REALM;
274 	if (all || cred_with_3gpp(wpa_s)) {
275 		info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
276 		wpa_supplicant_scard_init(wpa_s, NULL);
277 	}
278 	if (all || cred_with_domain(wpa_s))
279 		info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
280 	wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
281 		    (u8 *) info_ids, num_info_ids * 2);
282 
283 #ifdef CONFIG_HS20
284 	if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
285 		u8 *len_pos;
286 
287 		extra = wpabuf_alloc(100);
288 		if (!extra)
289 			return -1;
290 
291 		len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
292 		wpabuf_put_be24(extra, OUI_WFA);
293 		wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
294 		wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
295 		wpabuf_put_u8(extra, 0); /* Reserved */
296 		wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
297 		if (all)
298 			wpabuf_put_u8(extra,
299 				      HS20_STYPE_OPERATOR_FRIENDLY_NAME);
300 		if (all || cred_with_min_backhaul(wpa_s))
301 			wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
302 		if (all || cred_with_conn_capab(wpa_s))
303 			wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
304 		if (all)
305 			wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
306 		if (all) {
307 			wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST);
308 			wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_NAI_LIST);
309 		}
310 		gas_anqp_set_element_len(extra, len_pos);
311 	}
312 #endif /* CONFIG_HS20 */
313 
314 	buf = anqp_build_req(info_ids, num_info_ids, extra);
315 	wpabuf_free(extra);
316 	if (buf == NULL)
317 		return -1;
318 
319 	res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, 0, buf,
320 			    interworking_anqp_resp_cb, wpa_s);
321 	if (res < 0) {
322 		wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
323 		wpabuf_free(buf);
324 		ret = -1;
325 		eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
326 				       NULL);
327 	} else
328 		wpa_msg(wpa_s, MSG_DEBUG,
329 			"ANQP: Query started with dialog token %u", res);
330 
331 	return ret;
332 }
333 
334 
335 struct nai_realm_eap {
336 	u8 method;
337 	u8 inner_method;
338 	enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
339 	u8 cred_type;
340 	u8 tunneled_cred_type;
341 };
342 
343 struct nai_realm {
344 	u8 encoding;
345 	char *realm;
346 	u8 eap_count;
347 	struct nai_realm_eap *eap;
348 };
349 
350 
351 static void nai_realm_free(struct nai_realm *realms, u16 count)
352 {
353 	u16 i;
354 
355 	if (realms == NULL)
356 		return;
357 	for (i = 0; i < count; i++) {
358 		os_free(realms[i].eap);
359 		os_free(realms[i].realm);
360 	}
361 	os_free(realms);
362 }
363 
364 
365 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
366 				      const u8 *end)
367 {
368 	u8 elen, auth_count, a;
369 	const u8 *e_end;
370 
371 	if (end - pos < 3) {
372 		wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
373 		return NULL;
374 	}
375 
376 	elen = *pos++;
377 	if (elen > end - pos || elen < 2) {
378 		wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
379 		return NULL;
380 	}
381 	e_end = pos + elen;
382 	e->method = *pos++;
383 	auth_count = *pos++;
384 	wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
385 		   elen, e->method, auth_count);
386 
387 	for (a = 0; a < auth_count; a++) {
388 		u8 id, len;
389 
390 		if (end - pos < 2) {
391 			wpa_printf(MSG_DEBUG,
392 				   "No room for Authentication Parameter subfield header");
393 			return NULL;
394 		}
395 
396 		id = *pos++;
397 		len = *pos++;
398 		if (len > end - pos) {
399 			wpa_printf(MSG_DEBUG,
400 				   "No room for Authentication Parameter subfield");
401 			return NULL;
402 		}
403 
404 		switch (id) {
405 		case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
406 			if (len < 1)
407 				break;
408 			e->inner_non_eap = *pos;
409 			if (e->method != EAP_TYPE_TTLS)
410 				break;
411 			switch (*pos) {
412 			case NAI_REALM_INNER_NON_EAP_PAP:
413 				wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
414 				break;
415 			case NAI_REALM_INNER_NON_EAP_CHAP:
416 				wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
417 				break;
418 			case NAI_REALM_INNER_NON_EAP_MSCHAP:
419 				wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
420 				break;
421 			case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
422 				wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
423 				break;
424 			}
425 			break;
426 		case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
427 			if (len < 1)
428 				break;
429 			e->inner_method = *pos;
430 			wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
431 				   e->inner_method);
432 			break;
433 		case NAI_REALM_EAP_AUTH_CRED_TYPE:
434 			if (len < 1)
435 				break;
436 			e->cred_type = *pos;
437 			wpa_printf(MSG_DEBUG, "Credential Type: %u",
438 				   e->cred_type);
439 			break;
440 		case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
441 			if (len < 1)
442 				break;
443 			e->tunneled_cred_type = *pos;
444 			wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
445 				   "Type: %u", e->tunneled_cred_type);
446 			break;
447 		default:
448 			wpa_printf(MSG_DEBUG, "Unsupported Authentication "
449 				   "Parameter: id=%u len=%u", id, len);
450 			wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
451 				    "Value", pos, len);
452 			break;
453 		}
454 
455 		pos += len;
456 	}
457 
458 	return e_end;
459 }
460 
461 
462 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
463 					const u8 *end)
464 {
465 	u16 len;
466 	const u8 *f_end;
467 	u8 realm_len, e;
468 
469 	if (end - pos < 4) {
470 		wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
471 			   "fixed fields");
472 		return NULL;
473 	}
474 
475 	len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
476 	pos += 2;
477 	if (len > end - pos || len < 3) {
478 		wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
479 			   "(len=%u; left=%u)",
480 			   len, (unsigned int) (end - pos));
481 		return NULL;
482 	}
483 	f_end = pos + len;
484 
485 	r->encoding = *pos++;
486 	realm_len = *pos++;
487 	if (realm_len > f_end - pos) {
488 		wpa_printf(MSG_DEBUG, "No room for NAI Realm "
489 			   "(len=%u; left=%u)",
490 			   realm_len, (unsigned int) (f_end - pos));
491 		return NULL;
492 	}
493 	wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
494 	r->realm = dup_binstr(pos, realm_len);
495 	if (r->realm == NULL)
496 		return NULL;
497 	pos += realm_len;
498 
499 	if (f_end - pos < 1) {
500 		wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
501 		return NULL;
502 	}
503 	r->eap_count = *pos++;
504 	wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
505 	if (r->eap_count * 3 > f_end - pos) {
506 		wpa_printf(MSG_DEBUG, "No room for EAP Methods");
507 		return NULL;
508 	}
509 	r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
510 	if (r->eap == NULL)
511 		return NULL;
512 
513 	for (e = 0; e < r->eap_count; e++) {
514 		pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
515 		if (pos == NULL)
516 			return NULL;
517 	}
518 
519 	return f_end;
520 }
521 
522 
523 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
524 {
525 	struct nai_realm *realm;
526 	const u8 *pos, *end;
527 	u16 i, num;
528 	size_t left;
529 
530 	if (anqp == NULL)
531 		return NULL;
532 	left = wpabuf_len(anqp);
533 	if (left < 2)
534 		return NULL;
535 
536 	pos = wpabuf_head_u8(anqp);
537 	end = pos + left;
538 	num = WPA_GET_LE16(pos);
539 	wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
540 	pos += 2;
541 	left -= 2;
542 
543 	if (num > left / 5) {
544 		wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
545 			   "enough data (%u octets) for that many realms",
546 			   num, (unsigned int) left);
547 		return NULL;
548 	}
549 
550 	realm = os_calloc(num, sizeof(struct nai_realm));
551 	if (realm == NULL)
552 		return NULL;
553 
554 	for (i = 0; i < num; i++) {
555 		pos = nai_realm_parse_realm(&realm[i], pos, end);
556 		if (pos == NULL) {
557 			nai_realm_free(realm, num);
558 			return NULL;
559 		}
560 	}
561 
562 	*count = num;
563 	return realm;
564 }
565 
566 
567 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
568 {
569 	char *tmp, *pos, *end;
570 	int match = 0;
571 
572 	if (realm->realm == NULL || home_realm == NULL)
573 		return 0;
574 
575 	if (os_strchr(realm->realm, ';') == NULL)
576 		return os_strcasecmp(realm->realm, home_realm) == 0;
577 
578 	tmp = os_strdup(realm->realm);
579 	if (tmp == NULL)
580 		return 0;
581 
582 	pos = tmp;
583 	while (*pos) {
584 		end = os_strchr(pos, ';');
585 		if (end)
586 			*end = '\0';
587 		if (os_strcasecmp(pos, home_realm) == 0) {
588 			match = 1;
589 			break;
590 		}
591 		if (end == NULL)
592 			break;
593 		pos = end + 1;
594 	}
595 
596 	os_free(tmp);
597 
598 	return match;
599 }
600 
601 
602 static int nai_realm_cred_username(struct wpa_supplicant *wpa_s,
603 				   struct nai_realm_eap *eap)
604 {
605 	if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
606 		wpa_msg(wpa_s, MSG_DEBUG,
607 			"nai-realm-cred-username: EAP method not supported: %d",
608 			eap->method);
609 		return 0; /* method not supported */
610 	}
611 
612 	if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
613 	    eap->method != EAP_TYPE_FAST) {
614 		/* Only tunneled methods with username/password supported */
615 		wpa_msg(wpa_s, MSG_DEBUG,
616 			"nai-realm-cred-username: Method: %d is not TTLS, PEAP, or FAST",
617 			eap->method);
618 		return 0;
619 	}
620 
621 	if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) {
622 		if (eap->inner_method &&
623 		    eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
624 			wpa_msg(wpa_s, MSG_DEBUG,
625 				"nai-realm-cred-username: PEAP/FAST: Inner method not supported: %d",
626 				eap->inner_method);
627 			return 0;
628 		}
629 		if (!eap->inner_method &&
630 		    eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) {
631 			wpa_msg(wpa_s, MSG_DEBUG,
632 				"nai-realm-cred-username: MSCHAPv2 not supported");
633 			return 0;
634 		}
635 	}
636 
637 	if (eap->method == EAP_TYPE_TTLS) {
638 		if (eap->inner_method == 0 && eap->inner_non_eap == 0)
639 			return 1; /* Assume TTLS/MSCHAPv2 is used */
640 		if (eap->inner_method &&
641 		    eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
642 			wpa_msg(wpa_s, MSG_DEBUG,
643 				"nai-realm-cred-username: TTLS, but inner not supported: %d",
644 				eap->inner_method);
645 			return 0;
646 		}
647 		if (eap->inner_non_eap &&
648 		    eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
649 		    eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
650 		    eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
651 		    eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) {
652 			wpa_msg(wpa_s, MSG_DEBUG,
653 				"nai-realm-cred-username: TTLS, inner-non-eap not supported: %d",
654 				eap->inner_non_eap);
655 			return 0;
656 		}
657 	}
658 
659 	if (eap->inner_method &&
660 	    eap->inner_method != EAP_TYPE_GTC &&
661 	    eap->inner_method != EAP_TYPE_MSCHAPV2) {
662 		wpa_msg(wpa_s, MSG_DEBUG,
663 			"nai-realm-cred-username: inner-method not GTC or MSCHAPv2: %d",
664 			eap->inner_method);
665 		return 0;
666 	}
667 
668 	return 1;
669 }
670 
671 
672 static int nai_realm_cred_cert(struct wpa_supplicant *wpa_s,
673 			       struct nai_realm_eap *eap)
674 {
675 	if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
676 		wpa_msg(wpa_s, MSG_DEBUG,
677 			"nai-realm-cred-cert: Method not supported: %d",
678 			eap->method);
679 		return 0; /* method not supported */
680 	}
681 
682 	if (eap->method != EAP_TYPE_TLS) {
683 		/* Only EAP-TLS supported for credential authentication */
684 		wpa_msg(wpa_s, MSG_DEBUG,
685 			"nai-realm-cred-cert: Method not TLS: %d",
686 			eap->method);
687 		return 0;
688 	}
689 
690 	return 1;
691 }
692 
693 
694 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s,
695 						 struct wpa_cred *cred,
696 						 struct nai_realm *realm)
697 {
698 	u8 e;
699 
700 	if (cred->username == NULL ||
701 	    cred->username[0] == '\0' ||
702 	    ((cred->password == NULL ||
703 	      cred->password[0] == '\0') &&
704 	     (cred->private_key == NULL ||
705 	      cred->private_key[0] == '\0'))) {
706 		wpa_msg(wpa_s, MSG_DEBUG,
707 			"nai-realm-find-eap: incomplete cred info: username: %s  password: %s private_key: %s",
708 			cred->username ? cred->username : "NULL",
709 			cred->password ? cred->password : "NULL",
710 			cred->private_key ? cred->private_key : "NULL");
711 		return NULL;
712 	}
713 
714 	for (e = 0; e < realm->eap_count; e++) {
715 		struct nai_realm_eap *eap = &realm->eap[e];
716 		if (cred->password && cred->password[0] &&
717 		    nai_realm_cred_username(wpa_s, eap))
718 			return eap;
719 		if (cred->private_key && cred->private_key[0] &&
720 		    nai_realm_cred_cert(wpa_s, eap))
721 			return eap;
722 	}
723 
724 	return NULL;
725 }
726 
727 
728 #ifdef INTERWORKING_3GPP
729 
730 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
731 {
732 	u8 plmn[3], plmn2[3];
733 	const u8 *pos, *end;
734 	u8 udhl;
735 
736 	/*
737 	 * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
738 	 * operator is allowed to include only two digits of the MNC, so allow
739 	 * matches based on both two and three digit MNC assumptions. Since some
740 	 * SIM/USIM cards may not expose MNC length conveniently, we may be
741 	 * provided the default MNC length 3 here and as such, checking with MNC
742 	 * length 2 is justifiable even though 3GPP TS 24.234 does not mention
743 	 * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
744 	 * with otherwise matching values would not be good idea in general, so
745 	 * this should not result in selecting incorrect networks.
746 	 */
747 	/* Match with 3 digit MNC */
748 	plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
749 	plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
750 	plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
751 	/* Match with 2 digit MNC */
752 	plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
753 	plmn2[1] = (imsi[2] - '0') | 0xf0;
754 	plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
755 
756 	if (anqp == NULL)
757 		return 0;
758 	pos = wpabuf_head_u8(anqp);
759 	end = pos + wpabuf_len(anqp);
760 	if (end - pos < 2)
761 		return 0;
762 	if (*pos != 0) {
763 		wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
764 		return 0;
765 	}
766 	pos++;
767 	udhl = *pos++;
768 	if (udhl > end - pos) {
769 		wpa_printf(MSG_DEBUG, "Invalid UDHL");
770 		return 0;
771 	}
772 	end = pos + udhl;
773 
774 	wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
775 		   plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
776 		   imsi, mnc_len);
777 
778 	while (end - pos >= 2) {
779 		u8 iei, len;
780 		const u8 *l_end;
781 		iei = *pos++;
782 		len = *pos++ & 0x7f;
783 		if (len > end - pos)
784 			break;
785 		l_end = pos + len;
786 
787 		if (iei == 0 && len > 0) {
788 			/* PLMN List */
789 			u8 num, i;
790 			wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
791 				    pos, len);
792 			num = *pos++;
793 			for (i = 0; i < num; i++) {
794 				if (l_end - pos < 3)
795 					break;
796 				if (os_memcmp(pos, plmn, 3) == 0 ||
797 				    os_memcmp(pos, plmn2, 3) == 0)
798 					return 1; /* Found matching PLMN */
799 				pos += 3;
800 			}
801 		} else {
802 			wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
803 				    pos, len);
804 		}
805 
806 		pos = l_end;
807 	}
808 
809 	return 0;
810 }
811 
812 
813 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
814 			  size_t mnc_len, char prefix)
815 {
816 	const char *sep, *msin;
817 	char *end, *pos;
818 	size_t msin_len, plmn_len;
819 
820 	/*
821 	 * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
822 	 * Root NAI:
823 	 * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
824 	 * <MNC> is zero-padded to three digits in case two-digit MNC is used
825 	 */
826 
827 	if (imsi == NULL || os_strlen(imsi) > 16) {
828 		wpa_printf(MSG_DEBUG, "No valid IMSI available");
829 		return -1;
830 	}
831 	sep = os_strchr(imsi, '-');
832 	if (sep) {
833 		plmn_len = sep - imsi;
834 		msin = sep + 1;
835 	} else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
836 		plmn_len = 3 + mnc_len;
837 		msin = imsi + plmn_len;
838 	} else
839 		return -1;
840 	if (plmn_len != 5 && plmn_len != 6)
841 		return -1;
842 	msin_len = os_strlen(msin);
843 
844 	pos = nai;
845 	end = nai + nai_len;
846 	if (prefix)
847 		*pos++ = prefix;
848 	os_memcpy(pos, imsi, plmn_len);
849 	pos += plmn_len;
850 	os_memcpy(pos, msin, msin_len);
851 	pos += msin_len;
852 	pos += os_snprintf(pos, end - pos, "@wlan.mnc");
853 	if (plmn_len == 5) {
854 		*pos++ = '0';
855 		*pos++ = imsi[3];
856 		*pos++ = imsi[4];
857 	} else {
858 		*pos++ = imsi[3];
859 		*pos++ = imsi[4];
860 		*pos++ = imsi[5];
861 	}
862 	os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
863 		    imsi[0], imsi[1], imsi[2]);
864 
865 	return 0;
866 }
867 
868 
869 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
870 {
871 	char nai[100];
872 	if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
873 		return -1;
874 	return wpa_config_set_quoted(ssid, "identity", nai);
875 }
876 
877 #endif /* INTERWORKING_3GPP */
878 
879 
880 static int already_connected(struct wpa_supplicant *wpa_s,
881 			     struct wpa_cred *cred, struct wpa_bss *bss)
882 {
883 	struct wpa_ssid *ssid, *sel_ssid;
884 	struct wpa_bss *selected;
885 
886 	if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL)
887 		return 0;
888 
889 	ssid = wpa_s->current_ssid;
890 	if (ssid->parent_cred != cred)
891 		return 0;
892 
893 	if (ssid->ssid_len != bss->ssid_len ||
894 	    os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
895 		return 0;
896 
897 	sel_ssid = NULL;
898 	selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid);
899 	if (selected && sel_ssid && sel_ssid->priority > ssid->priority)
900 		return 0; /* higher priority network in scan results */
901 
902 	return 1;
903 }
904 
905 
906 static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
907 				     struct wpa_cred *cred,
908 				     struct wpa_bss *bss)
909 {
910 	struct wpa_ssid *ssid;
911 
912 	for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
913 		if (ssid->parent_cred != cred)
914 			continue;
915 		if (ssid->ssid_len != bss->ssid_len ||
916 		    os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
917 			continue;
918 
919 		break;
920 	}
921 
922 	if (ssid == NULL)
923 		return;
924 
925 	wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
926 
927 	if (ssid == wpa_s->current_ssid) {
928 		wpa_sm_set_config(wpa_s->wpa, NULL);
929 		eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
930 		wpa_s->own_disconnect_req = 1;
931 		wpa_supplicant_deauthenticate(wpa_s,
932 					      WLAN_REASON_DEAUTH_LEAVING);
933 	}
934 
935 	wpas_notify_network_removed(wpa_s, ssid);
936 	wpa_config_remove_network(wpa_s->conf, ssid->id);
937 }
938 
939 
940 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
941 					struct wpa_ssid *ssid)
942 {
943 	const char *key_mgmt = NULL;
944 #ifdef CONFIG_IEEE80211R
945 	int res;
946 	struct wpa_driver_capa capa;
947 
948 	res = wpa_drv_get_capa(wpa_s, &capa);
949 	if (res == 0 && capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_FT) {
950 		key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
951 			"WPA-EAP WPA-EAP-SHA256 FT-EAP" :
952 			"WPA-EAP FT-EAP";
953 	}
954 #endif /* CONFIG_IEEE80211R */
955 
956 	if (!key_mgmt)
957 		key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
958 			"WPA-EAP WPA-EAP-SHA256" : "WPA-EAP";
959 	if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0 ||
960 	    wpa_config_set(ssid, "proto", "RSN", 0) < 0 ||
961 	    wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
962 		return -1;
963 	return 0;
964 }
965 
966 
967 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
968 				     struct wpa_cred *cred,
969 				     struct wpa_bss *bss, int only_add)
970 {
971 #ifdef INTERWORKING_3GPP
972 	struct wpa_ssid *ssid;
973 	int eap_type;
974 	int res;
975 	char prefix;
976 
977 	if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
978 		return -1;
979 
980 	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
981 		" (3GPP)", MAC2STR(bss->bssid));
982 
983 	if (already_connected(wpa_s, cred, bss)) {
984 		wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
985 			MAC2STR(bss->bssid));
986 		return wpa_s->current_ssid->id;
987 	}
988 
989 	remove_duplicate_network(wpa_s, cred, bss);
990 
991 	ssid = wpa_config_add_network(wpa_s->conf);
992 	if (ssid == NULL)
993 		return -1;
994 	ssid->parent_cred = cred;
995 
996 	wpas_notify_network_added(wpa_s, ssid);
997 	wpa_config_set_network_defaults(ssid);
998 	ssid->priority = cred->priority;
999 	ssid->temporary = 1;
1000 	ssid->ssid = os_zalloc(bss->ssid_len + 1);
1001 	if (ssid->ssid == NULL)
1002 		goto fail;
1003 	os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1004 	ssid->ssid_len = bss->ssid_len;
1005 	ssid->eap.sim_num = cred->sim_num;
1006 
1007 	if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1008 		goto fail;
1009 
1010 	eap_type = EAP_TYPE_SIM;
1011 	if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
1012 		eap_type = EAP_TYPE_AKA;
1013 	if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
1014 		if (cred->eap_method[0].method == EAP_TYPE_SIM ||
1015 		    cred->eap_method[0].method == EAP_TYPE_AKA ||
1016 		    cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
1017 			eap_type = cred->eap_method[0].method;
1018 	}
1019 
1020 	switch (eap_type) {
1021 	case EAP_TYPE_SIM:
1022 		prefix = '1';
1023 		res = wpa_config_set(ssid, "eap", "SIM", 0);
1024 		break;
1025 	case EAP_TYPE_AKA:
1026 		prefix = '0';
1027 		res = wpa_config_set(ssid, "eap", "AKA", 0);
1028 		break;
1029 	case EAP_TYPE_AKA_PRIME:
1030 		prefix = '6';
1031 		res = wpa_config_set(ssid, "eap", "AKA'", 0);
1032 		break;
1033 	default:
1034 		res = -1;
1035 		break;
1036 	}
1037 	if (res < 0) {
1038 		wpa_msg(wpa_s, MSG_DEBUG,
1039 			"Selected EAP method (%d) not supported", eap_type);
1040 		goto fail;
1041 	}
1042 
1043 	if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
1044 		wpa_msg(wpa_s, MSG_DEBUG, "Failed to set Root NAI");
1045 		goto fail;
1046 	}
1047 
1048 	if (cred->milenage && cred->milenage[0]) {
1049 		if (wpa_config_set_quoted(ssid, "password",
1050 					  cred->milenage) < 0)
1051 			goto fail;
1052 	} else if (cred->pcsc) {
1053 		if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
1054 			goto fail;
1055 		if (wpa_s->conf->pcsc_pin &&
1056 		    wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
1057 		    < 0)
1058 			goto fail;
1059 	}
1060 
1061 	wpa_s->next_ssid = ssid;
1062 	wpa_config_update_prio_list(wpa_s->conf);
1063 	if (!only_add)
1064 		interworking_reconnect(wpa_s);
1065 
1066 	return ssid->id;
1067 
1068 fail:
1069 	wpas_notify_network_removed(wpa_s, ssid);
1070 	wpa_config_remove_network(wpa_s->conf, ssid->id);
1071 #endif /* INTERWORKING_3GPP */
1072 	return -1;
1073 }
1074 
1075 
1076 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
1077 					    size_t rc_len)
1078 {
1079 	const u8 *pos, *end;
1080 	u8 lens;
1081 
1082 	if (ie == NULL)
1083 		return 0;
1084 
1085 	pos = ie + 2;
1086 	end = ie + 2 + ie[1];
1087 
1088 	/* Roaming Consortium element:
1089 	 * Number of ANQP OIs
1090 	 * OI #1 and #2 lengths
1091 	 * OI #1, [OI #2], [OI #3]
1092 	 */
1093 
1094 	if (end - pos < 2)
1095 		return 0;
1096 
1097 	pos++; /* skip Number of ANQP OIs */
1098 	lens = *pos++;
1099 	if ((lens & 0x0f) + (lens >> 4) > end - pos)
1100 		return 0;
1101 
1102 	if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1103 		return 1;
1104 	pos += lens & 0x0f;
1105 
1106 	if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1107 		return 1;
1108 	pos += lens >> 4;
1109 
1110 	if (pos < end && (size_t) (end - pos) == rc_len &&
1111 	    os_memcmp(pos, rc_id, rc_len) == 0)
1112 		return 1;
1113 
1114 	return 0;
1115 }
1116 
1117 
1118 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
1119 					 const u8 *rc_id, size_t rc_len)
1120 {
1121 	const u8 *pos, *end;
1122 	u8 len;
1123 
1124 	if (anqp == NULL)
1125 		return 0;
1126 
1127 	pos = wpabuf_head(anqp);
1128 	end = pos + wpabuf_len(anqp);
1129 
1130 	/* Set of <OI Length, OI> duples */
1131 	while (pos < end) {
1132 		len = *pos++;
1133 		if (len > end - pos)
1134 			break;
1135 		if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1136 			return 1;
1137 		pos += len;
1138 	}
1139 
1140 	return 0;
1141 }
1142 
1143 
1144 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
1145 				    const u8 *rc_id, size_t rc_len)
1146 {
1147 	return roaming_consortium_element_match(ie, rc_id, rc_len) ||
1148 		roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1149 }
1150 
1151 
1152 static int cred_roaming_consortiums_match(const u8 *ie,
1153 					  const struct wpabuf *anqp,
1154 					  const struct wpa_cred *cred)
1155 {
1156 	unsigned int i;
1157 
1158 	for (i = 0; i < cred->num_roaming_consortiums; i++) {
1159 		if (roaming_consortium_match(ie, anqp,
1160 					     cred->roaming_consortiums[i],
1161 					     cred->roaming_consortiums_len[i]))
1162 			return 1;
1163 	}
1164 
1165 	return 0;
1166 }
1167 
1168 
1169 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1170 {
1171 	const u8 *ie;
1172 
1173 	if (cred->required_roaming_consortium_len == 0)
1174 		return 0;
1175 
1176 	ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1177 
1178 	if (ie == NULL &&
1179 	    (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1180 		return 1;
1181 
1182 	return !roaming_consortium_match(ie,
1183 					 bss->anqp ?
1184 					 bss->anqp->roaming_consortium : NULL,
1185 					 cred->required_roaming_consortium,
1186 					 cred->required_roaming_consortium_len);
1187 }
1188 
1189 
1190 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1191 {
1192 	size_t i;
1193 
1194 	if (!cred->excluded_ssid)
1195 		return 0;
1196 
1197 	for (i = 0; i < cred->num_excluded_ssid; i++) {
1198 		struct excluded_ssid *e = &cred->excluded_ssid[i];
1199 		if (bss->ssid_len == e->ssid_len &&
1200 		    os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1201 			return 1;
1202 	}
1203 
1204 	return 0;
1205 }
1206 
1207 
1208 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
1209 				   struct wpa_cred *cred, struct wpa_bss *bss)
1210 {
1211 #ifdef CONFIG_HS20
1212 	int res;
1213 	unsigned int dl_bandwidth, ul_bandwidth;
1214 	const u8 *wan;
1215 	u8 wan_info, dl_load, ul_load;
1216 	u16 lmd;
1217 	u32 ul_speed, dl_speed;
1218 
1219 	if (!cred->min_dl_bandwidth_home &&
1220 	    !cred->min_ul_bandwidth_home &&
1221 	    !cred->min_dl_bandwidth_roaming &&
1222 	    !cred->min_ul_bandwidth_roaming)
1223 		return 0; /* No bandwidth constraint specified */
1224 
1225 	if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL)
1226 		return 0; /* No WAN Metrics known - ignore constraint */
1227 
1228 	wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
1229 	wan_info = wan[0];
1230 	if (wan_info & BIT(3))
1231 		return 1; /* WAN link at capacity */
1232 	lmd = WPA_GET_LE16(wan + 11);
1233 	if (lmd == 0)
1234 		return 0; /* Downlink/Uplink Load was not measured */
1235 	dl_speed = WPA_GET_LE32(wan + 1);
1236 	ul_speed = WPA_GET_LE32(wan + 5);
1237 	dl_load = wan[9];
1238 	ul_load = wan[10];
1239 
1240 	if (dl_speed >= 0xffffff)
1241 		dl_bandwidth = dl_speed / 255 * (255 - dl_load);
1242 	else
1243 		dl_bandwidth = dl_speed * (255 - dl_load) / 255;
1244 
1245 	if (ul_speed >= 0xffffff)
1246 		ul_bandwidth = ul_speed / 255 * (255 - ul_load);
1247 	else
1248 		ul_bandwidth = ul_speed * (255 - ul_load) / 255;
1249 
1250 	res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1251 					bss->anqp->domain_name : NULL);
1252 	if (res > 0) {
1253 		if (cred->min_dl_bandwidth_home > dl_bandwidth)
1254 			return 1;
1255 		if (cred->min_ul_bandwidth_home > ul_bandwidth)
1256 			return 1;
1257 	} else {
1258 		if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
1259 			return 1;
1260 		if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
1261 			return 1;
1262 	}
1263 #endif /* CONFIG_HS20 */
1264 
1265 	return 0;
1266 }
1267 
1268 
1269 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
1270 				  struct wpa_cred *cred, struct wpa_bss *bss)
1271 {
1272 	const u8 *ie;
1273 	int res;
1274 
1275 	if (!cred->max_bss_load)
1276 		return 0; /* No BSS Load constraint specified */
1277 
1278 	ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
1279 	if (ie == NULL || ie[1] < 3)
1280 		return 0; /* No BSS Load advertised */
1281 
1282 	res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1283 					bss->anqp->domain_name : NULL);
1284 	if (res <= 0)
1285 		return 0; /* Not a home network */
1286 
1287 	return ie[4] > cred->max_bss_load;
1288 }
1289 
1290 
1291 #ifdef CONFIG_HS20
1292 
1293 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto)
1294 {
1295 	while (end - pos >= 4) {
1296 		if (pos[0] == proto && pos[3] == 1 /* Open */)
1297 			return 1;
1298 		pos += 4;
1299 	}
1300 
1301 	return 0;
1302 }
1303 
1304 
1305 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto,
1306 				u16 port)
1307 {
1308 	while (end - pos >= 4) {
1309 		if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
1310 		    pos[3] == 1 /* Open */)
1311 			return 1;
1312 		pos += 4;
1313 	}
1314 
1315 	return 0;
1316 }
1317 
1318 #endif /* CONFIG_HS20 */
1319 
1320 
1321 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
1322 				   struct wpa_cred *cred, struct wpa_bss *bss)
1323 {
1324 #ifdef CONFIG_HS20
1325 	int res;
1326 	const u8 *capab, *end;
1327 	unsigned int i, j;
1328 	int *ports;
1329 
1330 	if (!cred->num_req_conn_capab)
1331 		return 0; /* No connection capability constraint specified */
1332 
1333 	if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL)
1334 		return 0; /* No Connection Capability known - ignore constraint
1335 			   */
1336 
1337 	res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1338 					bss->anqp->domain_name : NULL);
1339 	if (res > 0)
1340 		return 0; /* No constraint in home network */
1341 
1342 	capab = wpabuf_head(bss->anqp->hs20_connection_capability);
1343 	end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
1344 
1345 	for (i = 0; i < cred->num_req_conn_capab; i++) {
1346 		ports = cred->req_conn_capab_port[i];
1347 		if (!ports) {
1348 			if (!has_proto_match(capab, end,
1349 					     cred->req_conn_capab_proto[i]))
1350 				return 1;
1351 		} else {
1352 			for (j = 0; ports[j] > -1; j++) {
1353 				if (!has_proto_port_match(
1354 					    capab, end,
1355 					    cred->req_conn_capab_proto[i],
1356 					    ports[j]))
1357 					return 1;
1358 			}
1359 		}
1360 	}
1361 #endif /* CONFIG_HS20 */
1362 
1363 	return 0;
1364 }
1365 
1366 
1367 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1368 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1369 	int *excluded)
1370 {
1371 	struct wpa_cred *cred, *selected = NULL;
1372 	const u8 *ie;
1373 	const struct wpabuf *anqp;
1374 	int is_excluded = 0;
1375 
1376 	ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1377 	anqp = bss->anqp ? bss->anqp->roaming_consortium : NULL;
1378 
1379 	if (!ie && !anqp)
1380 		return NULL;
1381 
1382 	if (wpa_s->conf->cred == NULL)
1383 		return NULL;
1384 
1385 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1386 		if (cred->roaming_consortium_len == 0 &&
1387 		    cred->num_roaming_consortiums == 0)
1388 			continue;
1389 
1390 		if ((cred->roaming_consortium_len == 0 ||
1391 		     !roaming_consortium_match(ie, anqp,
1392 					       cred->roaming_consortium,
1393 					       cred->roaming_consortium_len)) &&
1394 		    !cred_roaming_consortiums_match(ie, anqp, cred))
1395 			continue;
1396 
1397 		if (cred_no_required_oi_match(cred, bss))
1398 			continue;
1399 		if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1400 			continue;
1401 		if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1402 			continue;
1403 		if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1404 			continue;
1405 		if (cred_excluded_ssid(cred, bss)) {
1406 			if (excluded == NULL)
1407 				continue;
1408 			if (selected == NULL) {
1409 				selected = cred;
1410 				is_excluded = 1;
1411 			}
1412 		} else {
1413 			if (selected == NULL || is_excluded ||
1414 			    cred_prio_cmp(selected, cred) < 0) {
1415 				selected = cred;
1416 				is_excluded = 0;
1417 			}
1418 		}
1419 	}
1420 
1421 	if (excluded)
1422 		*excluded = is_excluded;
1423 
1424 	return selected;
1425 }
1426 
1427 
1428 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1429 				       struct wpa_cred *cred, int ttls)
1430 {
1431 	if (cred->eap_method) {
1432 		ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1433 			cred->eap_method->method == EAP_TYPE_TTLS;
1434 
1435 		os_free(ssid->eap.eap_methods);
1436 		ssid->eap.eap_methods =
1437 			os_malloc(sizeof(struct eap_method_type) * 2);
1438 		if (ssid->eap.eap_methods == NULL)
1439 			return -1;
1440 		os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1441 			  sizeof(*cred->eap_method));
1442 		ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1443 		ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1444 	}
1445 
1446 	if (ttls && cred->username && cred->username[0]) {
1447 		const char *pos;
1448 		char *anon;
1449 		/* Use anonymous NAI in Phase 1 */
1450 		pos = os_strchr(cred->username, '@');
1451 		if (pos) {
1452 			size_t buflen = 9 + os_strlen(pos) + 1;
1453 			anon = os_malloc(buflen);
1454 			if (anon == NULL)
1455 				return -1;
1456 			os_snprintf(anon, buflen, "anonymous%s", pos);
1457 		} else if (cred->realm) {
1458 			size_t buflen = 10 + os_strlen(cred->realm) + 1;
1459 			anon = os_malloc(buflen);
1460 			if (anon == NULL)
1461 				return -1;
1462 			os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1463 		} else {
1464 			anon = os_strdup("anonymous");
1465 			if (anon == NULL)
1466 				return -1;
1467 		}
1468 		if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1469 		    0) {
1470 			os_free(anon);
1471 			return -1;
1472 		}
1473 		os_free(anon);
1474 	}
1475 
1476 	if (!ttls && cred->username && cred->username[0] && cred->realm &&
1477 	    !os_strchr(cred->username, '@')) {
1478 		char *id;
1479 		size_t buflen;
1480 		int res;
1481 
1482 		buflen = os_strlen(cred->username) + 1 +
1483 			os_strlen(cred->realm) + 1;
1484 
1485 		id = os_malloc(buflen);
1486 		if (!id)
1487 			return -1;
1488 		os_snprintf(id, buflen, "%s@%s", cred->username, cred->realm);
1489 		res = wpa_config_set_quoted(ssid, "identity", id);
1490 		os_free(id);
1491 		if (res < 0)
1492 			return -1;
1493 	} else if (cred->username && cred->username[0] &&
1494 	    wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1495 		return -1;
1496 
1497 	if (cred->password && cred->password[0]) {
1498 		if (cred->ext_password &&
1499 		    wpa_config_set(ssid, "password", cred->password, 0) < 0)
1500 			return -1;
1501 		if (!cred->ext_password &&
1502 		    wpa_config_set_quoted(ssid, "password", cred->password) <
1503 		    0)
1504 			return -1;
1505 	}
1506 
1507 	if (cred->client_cert && cred->client_cert[0] &&
1508 	    wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1509 		return -1;
1510 
1511 #ifdef ANDROID
1512 	if (cred->private_key &&
1513 	    os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1514 		/* Use OpenSSL engine configuration for Android keystore */
1515 		if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1516 		    wpa_config_set_quoted(ssid, "key_id",
1517 					  cred->private_key + 11) < 0 ||
1518 		    wpa_config_set(ssid, "engine", "1", 0) < 0)
1519 			return -1;
1520 	} else
1521 #endif /* ANDROID */
1522 	if (cred->private_key && cred->private_key[0] &&
1523 	    wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1524 		return -1;
1525 
1526 	if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1527 	    wpa_config_set_quoted(ssid, "private_key_passwd",
1528 				  cred->private_key_passwd) < 0)
1529 		return -1;
1530 
1531 	if (cred->phase1) {
1532 		os_free(ssid->eap.phase1);
1533 		ssid->eap.phase1 = os_strdup(cred->phase1);
1534 	}
1535 	if (cred->phase2) {
1536 		os_free(ssid->eap.phase2);
1537 		ssid->eap.phase2 = os_strdup(cred->phase2);
1538 	}
1539 
1540 	if (cred->ca_cert && cred->ca_cert[0] &&
1541 	    wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1542 		return -1;
1543 
1544 	if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1545 	    wpa_config_set_quoted(ssid, "domain_suffix_match",
1546 				  cred->domain_suffix_match) < 0)
1547 		return -1;
1548 
1549 	ssid->eap.ocsp = cred->ocsp;
1550 
1551 	return 0;
1552 }
1553 
1554 
1555 static int interworking_connect_roaming_consortium(
1556 	struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1557 	struct wpa_bss *bss, int only_add)
1558 {
1559 	struct wpa_ssid *ssid;
1560 	const u8 *ie;
1561 	const struct wpabuf *anqp;
1562 	unsigned int i;
1563 
1564 	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
1565 		" based on roaming consortium match", MAC2STR(bss->bssid));
1566 
1567 	if (already_connected(wpa_s, cred, bss)) {
1568 		wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1569 			MAC2STR(bss->bssid));
1570 		return wpa_s->current_ssid->id;
1571 	}
1572 
1573 	remove_duplicate_network(wpa_s, cred, bss);
1574 
1575 	ssid = wpa_config_add_network(wpa_s->conf);
1576 	if (ssid == NULL)
1577 		return -1;
1578 	ssid->parent_cred = cred;
1579 	wpas_notify_network_added(wpa_s, ssid);
1580 	wpa_config_set_network_defaults(ssid);
1581 	ssid->priority = cred->priority;
1582 	ssid->temporary = 1;
1583 	ssid->ssid = os_zalloc(bss->ssid_len + 1);
1584 	if (ssid->ssid == NULL)
1585 		goto fail;
1586 	os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1587 	ssid->ssid_len = bss->ssid_len;
1588 
1589 	if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1590 		goto fail;
1591 
1592 	ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1593 	anqp = bss->anqp ? bss->anqp->roaming_consortium : NULL;
1594 	for (i = 0; (ie || anqp) && i < cred->num_roaming_consortiums; i++) {
1595 		if (!roaming_consortium_match(
1596 			    ie, anqp, cred->roaming_consortiums[i],
1597 			    cred->roaming_consortiums_len[i]))
1598 			continue;
1599 
1600 		ssid->roaming_consortium_selection =
1601 			os_malloc(cred->roaming_consortiums_len[i]);
1602 		if (!ssid->roaming_consortium_selection)
1603 			goto fail;
1604 		os_memcpy(ssid->roaming_consortium_selection,
1605 			  cred->roaming_consortiums[i],
1606 			  cred->roaming_consortiums_len[i]);
1607 		ssid->roaming_consortium_selection_len =
1608 			cred->roaming_consortiums_len[i];
1609 		break;
1610 	}
1611 
1612 	if (cred->eap_method == NULL) {
1613 		wpa_msg(wpa_s, MSG_DEBUG,
1614 			"Interworking: No EAP method set for credential using roaming consortium");
1615 		goto fail;
1616 	}
1617 
1618 	if (interworking_set_eap_params(
1619 		    ssid, cred,
1620 		    cred->eap_method->vendor == EAP_VENDOR_IETF &&
1621 		    cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1622 		goto fail;
1623 
1624 	wpa_s->next_ssid = ssid;
1625 	wpa_config_update_prio_list(wpa_s->conf);
1626 	if (!only_add)
1627 		interworking_reconnect(wpa_s);
1628 
1629 	return ssid->id;
1630 
1631 fail:
1632 	wpas_notify_network_removed(wpa_s, ssid);
1633 	wpa_config_remove_network(wpa_s->conf, ssid->id);
1634 	return -1;
1635 }
1636 
1637 
1638 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
1639 			 int only_add)
1640 {
1641 	struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1642 	struct wpa_ssid *ssid;
1643 	struct nai_realm *realm;
1644 	struct nai_realm_eap *eap = NULL;
1645 	u16 count, i;
1646 	char buf[100];
1647 	int excluded = 0, *excl = &excluded;
1648 	const char *name;
1649 
1650 	if (wpa_s->conf->cred == NULL || bss == NULL)
1651 		return -1;
1652 	if (disallowed_bssid(wpa_s, bss->bssid) ||
1653 	    disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1654 		wpa_msg(wpa_s, MSG_DEBUG,
1655 			"Interworking: Reject connection to disallowed BSS "
1656 			MACSTR, MAC2STR(bss->bssid));
1657 		return -1;
1658 	}
1659 
1660 	wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1661 		   " for connection",
1662 		   MAC2STR(bss->bssid));
1663 
1664 	if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1665 		/*
1666 		 * We currently support only HS 2.0 networks and those are
1667 		 * required to use WPA2-Enterprise.
1668 		 */
1669 		wpa_msg(wpa_s, MSG_DEBUG,
1670 			"Interworking: Network does not use RSN");
1671 		return -1;
1672 	}
1673 
1674 	cred_rc = interworking_credentials_available_roaming_consortium(
1675 		wpa_s, bss, 0, excl);
1676 	if (cred_rc) {
1677 		wpa_msg(wpa_s, MSG_DEBUG,
1678 			"Interworking: Highest roaming consortium matching credential priority %d sp_priority %d",
1679 			cred_rc->priority, cred_rc->sp_priority);
1680 		if (excl && !(*excl))
1681 			excl = NULL;
1682 	}
1683 
1684 	cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1685 	if (cred) {
1686 		wpa_msg(wpa_s, MSG_DEBUG,
1687 			"Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d",
1688 			cred->priority, cred->sp_priority);
1689 		if (excl && !(*excl))
1690 			excl = NULL;
1691 	}
1692 
1693 	cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1694 							    excl);
1695 	if (cred_3gpp) {
1696 		wpa_msg(wpa_s, MSG_DEBUG,
1697 			"Interworking: Highest 3GPP matching credential priority %d sp_priority %d",
1698 			cred_3gpp->priority, cred_3gpp->sp_priority);
1699 		if (excl && !(*excl))
1700 			excl = NULL;
1701 	}
1702 
1703 	if (!cred_rc && !cred && !cred_3gpp) {
1704 		wpa_msg(wpa_s, MSG_DEBUG,
1705 			"Interworking: No full credential matches - consider options without BW(etc.) limits");
1706 		cred_rc = interworking_credentials_available_roaming_consortium(
1707 			wpa_s, bss, 1, excl);
1708 		if (cred_rc) {
1709 			wpa_msg(wpa_s, MSG_DEBUG,
1710 				"Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)",
1711 				cred_rc->priority, cred_rc->sp_priority);
1712 			if (excl && !(*excl))
1713 				excl = NULL;
1714 		}
1715 
1716 		cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1717 								excl);
1718 		if (cred) {
1719 			wpa_msg(wpa_s, MSG_DEBUG,
1720 				"Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)",
1721 				cred->priority, cred->sp_priority);
1722 			if (excl && !(*excl))
1723 				excl = NULL;
1724 		}
1725 
1726 		cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1727 								    1, excl);
1728 		if (cred_3gpp) {
1729 			wpa_msg(wpa_s, MSG_DEBUG,
1730 				"Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)",
1731 				cred_3gpp->priority, cred_3gpp->sp_priority);
1732 			if (excl && !(*excl))
1733 				excl = NULL;
1734 		}
1735 	}
1736 
1737 	if (cred_rc &&
1738 	    (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1739 	    (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1740 		return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1741 							       bss, only_add);
1742 
1743 	if (cred_3gpp &&
1744 	    (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1745 		return interworking_connect_3gpp(wpa_s, cred_3gpp, bss,
1746 						 only_add);
1747 	}
1748 
1749 	if (cred == NULL) {
1750 		wpa_msg(wpa_s, MSG_DEBUG,
1751 			"Interworking: No matching credentials found for "
1752 			MACSTR, MAC2STR(bss->bssid));
1753 		return -1;
1754 	}
1755 
1756 	realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1757 				&count);
1758 	if (realm == NULL) {
1759 		wpa_msg(wpa_s, MSG_DEBUG,
1760 			"Interworking: Could not parse NAI Realm list from "
1761 			MACSTR, MAC2STR(bss->bssid));
1762 		return -1;
1763 	}
1764 
1765 	for (i = 0; i < count; i++) {
1766 		if (!nai_realm_match(&realm[i], cred->realm))
1767 			continue;
1768 		eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1769 		if (eap)
1770 			break;
1771 	}
1772 
1773 	if (!eap) {
1774 		wpa_msg(wpa_s, MSG_DEBUG,
1775 			"Interworking: No matching credentials and EAP method found for "
1776 			MACSTR, MAC2STR(bss->bssid));
1777 		nai_realm_free(realm, count);
1778 		return -1;
1779 	}
1780 
1781 	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR,
1782 		MAC2STR(bss->bssid));
1783 
1784 	if (already_connected(wpa_s, cred, bss)) {
1785 		wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1786 			MAC2STR(bss->bssid));
1787 		nai_realm_free(realm, count);
1788 		return 0;
1789 	}
1790 
1791 	remove_duplicate_network(wpa_s, cred, bss);
1792 
1793 	ssid = wpa_config_add_network(wpa_s->conf);
1794 	if (ssid == NULL) {
1795 		nai_realm_free(realm, count);
1796 		return -1;
1797 	}
1798 	ssid->parent_cred = cred;
1799 	wpas_notify_network_added(wpa_s, ssid);
1800 	wpa_config_set_network_defaults(ssid);
1801 	ssid->priority = cred->priority;
1802 	ssid->temporary = 1;
1803 	ssid->ssid = os_zalloc(bss->ssid_len + 1);
1804 	if (ssid->ssid == NULL)
1805 		goto fail;
1806 	os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1807 	ssid->ssid_len = bss->ssid_len;
1808 
1809 	if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1810 		goto fail;
1811 
1812 	if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1813 						     eap->method), 0) < 0)
1814 		goto fail;
1815 
1816 	switch (eap->method) {
1817 	case EAP_TYPE_TTLS:
1818 		if (eap->inner_method) {
1819 			name = eap_get_name(EAP_VENDOR_IETF, eap->inner_method);
1820 			if (!name)
1821 				goto fail;
1822 			os_snprintf(buf, sizeof(buf), "\"autheap=%s\"", name);
1823 			if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1824 				goto fail;
1825 			break;
1826 		}
1827 		switch (eap->inner_non_eap) {
1828 		case NAI_REALM_INNER_NON_EAP_PAP:
1829 			if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1830 			    0)
1831 				goto fail;
1832 			break;
1833 		case NAI_REALM_INNER_NON_EAP_CHAP:
1834 			if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1835 			    < 0)
1836 				goto fail;
1837 			break;
1838 		case NAI_REALM_INNER_NON_EAP_MSCHAP:
1839 			if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1840 					   0) < 0)
1841 				goto fail;
1842 			break;
1843 		case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1844 			if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1845 					   0) < 0)
1846 				goto fail;
1847 			break;
1848 		default:
1849 			/* EAP params were not set - assume TTLS/MSCHAPv2 */
1850 			if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1851 					   0) < 0)
1852 				goto fail;
1853 			break;
1854 		}
1855 		break;
1856 	case EAP_TYPE_PEAP:
1857 	case EAP_TYPE_FAST:
1858 		if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1859 				   0) < 0)
1860 			goto fail;
1861 		if (wpa_config_set(ssid, "pac_file",
1862 				   "\"blob://pac_interworking\"", 0) < 0)
1863 			goto fail;
1864 		name = eap_get_name(EAP_VENDOR_IETF,
1865 				    eap->inner_method ? eap->inner_method :
1866 				    EAP_TYPE_MSCHAPV2);
1867 		if (name == NULL)
1868 			goto fail;
1869 		os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1870 		if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1871 			goto fail;
1872 		break;
1873 	case EAP_TYPE_TLS:
1874 		break;
1875 	}
1876 
1877 	if (interworking_set_eap_params(ssid, cred,
1878 					eap->method == EAP_TYPE_TTLS) < 0)
1879 		goto fail;
1880 
1881 	nai_realm_free(realm, count);
1882 
1883 	wpa_s->next_ssid = ssid;
1884 	wpa_config_update_prio_list(wpa_s->conf);
1885 	if (!only_add)
1886 		interworking_reconnect(wpa_s);
1887 
1888 	return ssid->id;
1889 
1890 fail:
1891 	wpas_notify_network_removed(wpa_s, ssid);
1892 	wpa_config_remove_network(wpa_s->conf, ssid->id);
1893 	nai_realm_free(realm, count);
1894 	return -1;
1895 }
1896 
1897 
1898 #ifdef PCSC_FUNCS
1899 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1900 {
1901 	size_t len;
1902 
1903 	if (wpa_s->imsi[0] && wpa_s->mnc_len)
1904 		return 0;
1905 
1906 	len = sizeof(wpa_s->imsi) - 1;
1907 	if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1908 		scard_deinit(wpa_s->scard);
1909 		wpa_s->scard = NULL;
1910 		wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1911 		return -1;
1912 	}
1913 	wpa_s->imsi[len] = '\0';
1914 	wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1915 	wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1916 		   wpa_s->imsi, wpa_s->mnc_len);
1917 
1918 	return 0;
1919 }
1920 #endif /* PCSC_FUNCS */
1921 
1922 
1923 static struct wpa_cred * interworking_credentials_available_3gpp(
1924 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1925 	int *excluded)
1926 {
1927 	struct wpa_cred *selected = NULL;
1928 #ifdef INTERWORKING_3GPP
1929 	struct wpa_cred *cred;
1930 	int ret;
1931 	int is_excluded = 0;
1932 
1933 	if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) {
1934 		wpa_msg(wpa_s, MSG_DEBUG,
1935 			"interworking-avail-3gpp: not avail, anqp: %p  anqp_3gpp: %p",
1936 			bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
1937 		return NULL;
1938 	}
1939 
1940 #ifdef CONFIG_EAP_PROXY
1941 	if (!wpa_s->imsi[0]) {
1942 		size_t len;
1943 		wpa_msg(wpa_s, MSG_DEBUG,
1944 			"Interworking: IMSI not available - try to read again through eap_proxy");
1945 		wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol, -1,
1946 							     wpa_s->imsi,
1947 							     &len);
1948 		if (wpa_s->mnc_len > 0) {
1949 			wpa_s->imsi[len] = '\0';
1950 			wpa_msg(wpa_s, MSG_DEBUG,
1951 				"eap_proxy: IMSI %s (MNC length %d)",
1952 				wpa_s->imsi, wpa_s->mnc_len);
1953 		} else {
1954 			wpa_msg(wpa_s, MSG_DEBUG,
1955 				"eap_proxy: IMSI not available");
1956 		}
1957 	}
1958 #endif /* CONFIG_EAP_PROXY */
1959 
1960 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1961 		char *sep;
1962 		const char *imsi;
1963 		int mnc_len;
1964 		char imsi_buf[16];
1965 		size_t msin_len;
1966 
1967 #ifdef PCSC_FUNCS
1968 		if (cred->pcsc && wpa_s->scard) {
1969 			if (interworking_pcsc_read_imsi(wpa_s) < 0)
1970 				continue;
1971 			imsi = wpa_s->imsi;
1972 			mnc_len = wpa_s->mnc_len;
1973 			goto compare;
1974 		}
1975 #endif /* PCSC_FUNCS */
1976 #ifdef CONFIG_EAP_PROXY
1977 		if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1978 			imsi = wpa_s->imsi;
1979 			mnc_len = wpa_s->mnc_len;
1980 			goto compare;
1981 		}
1982 #endif /* CONFIG_EAP_PROXY */
1983 
1984 		if (cred->imsi == NULL || !cred->imsi[0] ||
1985 		    (!wpa_s->conf->external_sim &&
1986 		     (cred->milenage == NULL || !cred->milenage[0])))
1987 			continue;
1988 
1989 		sep = os_strchr(cred->imsi, '-');
1990 		if (sep == NULL ||
1991 		    (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1992 			continue;
1993 		mnc_len = sep - cred->imsi - 3;
1994 		os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1995 		sep++;
1996 		msin_len = os_strlen(cred->imsi);
1997 		if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1998 			msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1999 		os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
2000 		imsi_buf[3 + mnc_len + msin_len] = '\0';
2001 		imsi = imsi_buf;
2002 
2003 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
2004 	compare:
2005 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
2006 		wpa_msg(wpa_s, MSG_DEBUG,
2007 			"Interworking: Parsing 3GPP info from " MACSTR,
2008 			MAC2STR(bss->bssid));
2009 		ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
2010 		wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound",
2011 			ret ? "" : "not ");
2012 		if (ret) {
2013 			if (cred_no_required_oi_match(cred, bss))
2014 				continue;
2015 			if (!ignore_bw &&
2016 			    cred_below_min_backhaul(wpa_s, cred, bss))
2017 				continue;
2018 			if (!ignore_bw &&
2019 			    cred_over_max_bss_load(wpa_s, cred, bss))
2020 				continue;
2021 			if (!ignore_bw &&
2022 			    cred_conn_capab_missing(wpa_s, cred, bss))
2023 				continue;
2024 			if (cred_excluded_ssid(cred, bss)) {
2025 				if (excluded == NULL)
2026 					continue;
2027 				if (selected == NULL) {
2028 					selected = cred;
2029 					is_excluded = 1;
2030 				}
2031 			} else {
2032 				if (selected == NULL || is_excluded ||
2033 				    cred_prio_cmp(selected, cred) < 0) {
2034 					selected = cred;
2035 					is_excluded = 0;
2036 				}
2037 			}
2038 		}
2039 	}
2040 
2041 	if (excluded)
2042 		*excluded = is_excluded;
2043 #endif /* INTERWORKING_3GPP */
2044 	return selected;
2045 }
2046 
2047 
2048 static struct wpa_cred * interworking_credentials_available_realm(
2049 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2050 	int *excluded)
2051 {
2052 	struct wpa_cred *cred, *selected = NULL;
2053 	struct nai_realm *realm;
2054 	u16 count, i;
2055 	int is_excluded = 0;
2056 
2057 	if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
2058 		return NULL;
2059 
2060 	if (wpa_s->conf->cred == NULL)
2061 		return NULL;
2062 
2063 	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
2064 		MACSTR, MAC2STR(bss->bssid));
2065 	realm = nai_realm_parse(bss->anqp->nai_realm, &count);
2066 	if (realm == NULL) {
2067 		wpa_msg(wpa_s, MSG_DEBUG,
2068 			"Interworking: Could not parse NAI Realm list from "
2069 			MACSTR, MAC2STR(bss->bssid));
2070 		return NULL;
2071 	}
2072 
2073 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2074 		if (cred->realm == NULL)
2075 			continue;
2076 
2077 		for (i = 0; i < count; i++) {
2078 			if (!nai_realm_match(&realm[i], cred->realm))
2079 				continue;
2080 			if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2081 				if (cred_no_required_oi_match(cred, bss))
2082 					continue;
2083 				if (!ignore_bw &&
2084 				    cred_below_min_backhaul(wpa_s, cred, bss))
2085 					continue;
2086 				if (!ignore_bw &&
2087 				    cred_over_max_bss_load(wpa_s, cred, bss))
2088 					continue;
2089 				if (!ignore_bw &&
2090 				    cred_conn_capab_missing(wpa_s, cred, bss))
2091 					continue;
2092 				if (cred_excluded_ssid(cred, bss)) {
2093 					if (excluded == NULL)
2094 						continue;
2095 					if (selected == NULL) {
2096 						selected = cred;
2097 						is_excluded = 1;
2098 					}
2099 				} else {
2100 					if (selected == NULL || is_excluded ||
2101 					    cred_prio_cmp(selected, cred) < 0)
2102 					{
2103 						selected = cred;
2104 						is_excluded = 0;
2105 					}
2106 				}
2107 				break;
2108 			} else {
2109 				wpa_msg(wpa_s, MSG_DEBUG,
2110 					"Interworking: realm-find-eap returned false");
2111 			}
2112 		}
2113 	}
2114 
2115 	nai_realm_free(realm, count);
2116 
2117 	if (excluded)
2118 		*excluded = is_excluded;
2119 
2120 	return selected;
2121 }
2122 
2123 
2124 static struct wpa_cred * interworking_credentials_available_helper(
2125 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2126 	int *excluded)
2127 {
2128 	struct wpa_cred *cred, *cred2;
2129 	int excluded1, excluded2 = 0;
2130 
2131 	if (disallowed_bssid(wpa_s, bss->bssid) ||
2132 	    disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2133 		wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2134 			   MACSTR, MAC2STR(bss->bssid));
2135 		return NULL;
2136 	}
2137 
2138 	cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2139 							&excluded1);
2140 	cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2141 							&excluded2);
2142 	if (cred && cred2 &&
2143 	    (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2144 		cred = cred2;
2145 		excluded1 = excluded2;
2146 	}
2147 	if (!cred) {
2148 		cred = cred2;
2149 		excluded1 = excluded2;
2150 	}
2151 
2152 	cred2 = interworking_credentials_available_roaming_consortium(
2153 		wpa_s, bss, ignore_bw, &excluded2);
2154 	if (cred && cred2 &&
2155 	    (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2156 		cred = cred2;
2157 		excluded1 = excluded2;
2158 	}
2159 	if (!cred) {
2160 		cred = cred2;
2161 		excluded1 = excluded2;
2162 	}
2163 
2164 	if (excluded)
2165 		*excluded = excluded1;
2166 	return cred;
2167 }
2168 
2169 
2170 static struct wpa_cred * interworking_credentials_available(
2171 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
2172 {
2173 	struct wpa_cred *cred;
2174 
2175 	if (excluded)
2176 		*excluded = 0;
2177 	cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2178 							 excluded);
2179 	if (cred)
2180 		return cred;
2181 	return interworking_credentials_available_helper(wpa_s, bss, 1,
2182 							 excluded);
2183 }
2184 
2185 
2186 int domain_name_list_contains(struct wpabuf *domain_names,
2187 			      const char *domain, int exact_match)
2188 {
2189 	const u8 *pos, *end;
2190 	size_t len;
2191 
2192 	len = os_strlen(domain);
2193 	pos = wpabuf_head(domain_names);
2194 	end = pos + wpabuf_len(domain_names);
2195 
2196 	while (end - pos > 1) {
2197 		u8 elen;
2198 
2199 		elen = *pos++;
2200 		if (elen > end - pos)
2201 			break;
2202 
2203 		wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2204 				  pos, elen);
2205 		if (elen == len &&
2206 		    os_strncasecmp(domain, (const char *) pos, len) == 0)
2207 			return 1;
2208 		if (!exact_match && elen > len && pos[elen - len - 1] == '.') {
2209 			const char *ap = (const char *) pos;
2210 			int offset = elen - len;
2211 
2212 			if (os_strncasecmp(domain, ap + offset, len) == 0)
2213 				return 1;
2214 		}
2215 
2216 		pos += elen;
2217 	}
2218 
2219 	return 0;
2220 }
2221 
2222 
2223 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2224 			      struct wpa_cred *cred,
2225 			      struct wpabuf *domain_names)
2226 {
2227 	size_t i;
2228 	int ret = -1;
2229 #ifdef INTERWORKING_3GPP
2230 	char nai[100], *realm;
2231 
2232 	char *imsi = NULL;
2233 	int mnc_len = 0;
2234 	if (cred->imsi)
2235 		imsi = cred->imsi;
2236 #ifdef PCSC_FUNCS
2237 	else if (cred->pcsc && wpa_s->scard) {
2238 		if (interworking_pcsc_read_imsi(wpa_s) < 0)
2239 			return -1;
2240 		imsi = wpa_s->imsi;
2241 		mnc_len = wpa_s->mnc_len;
2242 	}
2243 #endif /* PCSC_FUNCS */
2244 #ifdef CONFIG_EAP_PROXY
2245 	else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2246 		imsi = wpa_s->imsi;
2247 		mnc_len = wpa_s->mnc_len;
2248 	}
2249 #endif /* CONFIG_EAP_PROXY */
2250 	if (domain_names &&
2251 	    imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2252 		realm = os_strchr(nai, '@');
2253 		if (realm)
2254 			realm++;
2255 		wpa_msg(wpa_s, MSG_DEBUG,
2256 			"Interworking: Search for match with SIM/USIM domain %s",
2257 			realm);
2258 		if (realm &&
2259 		    domain_name_list_contains(domain_names, realm, 1))
2260 			return 1;
2261 		if (realm)
2262 			ret = 0;
2263 	}
2264 #endif /* INTERWORKING_3GPP */
2265 
2266 	if (domain_names == NULL || cred->domain == NULL)
2267 		return ret;
2268 
2269 	for (i = 0; i < cred->num_domain; i++) {
2270 		wpa_msg(wpa_s, MSG_DEBUG,
2271 			"Interworking: Search for match with home SP FQDN %s",
2272 			cred->domain[i]);
2273 		if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2274 			return 1;
2275 	}
2276 
2277 	return 0;
2278 }
2279 
2280 
2281 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2282 				struct wpabuf *domain_names)
2283 {
2284 	struct wpa_cred *cred;
2285 
2286 	if (domain_names == NULL || wpa_s->conf->cred == NULL)
2287 		return -1;
2288 
2289 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2290 		int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2291 		if (res)
2292 			return res;
2293 	}
2294 
2295 	return 0;
2296 }
2297 
2298 
2299 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2300 {
2301 	struct wpa_bss *bss;
2302 	struct wpa_ssid *ssid;
2303 
2304 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2305 		for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2306 			if (wpas_network_disabled(wpa_s, ssid) ||
2307 			    ssid->mode != WPAS_MODE_INFRA)
2308 				continue;
2309 			if (ssid->ssid_len != bss->ssid_len ||
2310 			    os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2311 			    0)
2312 				continue;
2313 			/*
2314 			 * TODO: Consider more accurate matching of security
2315 			 * configuration similarly to what is done in events.c
2316 			 */
2317 			return 1;
2318 		}
2319 	}
2320 
2321 	return 0;
2322 }
2323 
2324 
2325 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2326 				 struct roaming_partner *partner,
2327 				 struct wpabuf *domain_names)
2328 {
2329 	wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2330 		   partner->fqdn, partner->exact_match, partner->priority,
2331 		   partner->country);
2332 	wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2333 			  wpabuf_head(domain_names),
2334 			  wpabuf_len(domain_names));
2335 	if (!domain_name_list_contains(domain_names, partner->fqdn,
2336 				       partner->exact_match))
2337 		return 0;
2338 	/* TODO: match Country */
2339 	return 1;
2340 }
2341 
2342 
2343 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2344 		       struct wpa_bss *bss)
2345 {
2346 	size_t i;
2347 
2348 	if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
2349 		wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2350 		return 128; /* cannot check preference with domain name */
2351 	}
2352 
2353 	if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2354 	{
2355 		wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2356 		return 0; /* max preference for home SP network */
2357 	}
2358 
2359 	for (i = 0; i < cred->num_roaming_partner; i++) {
2360 		if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2361 					  bss->anqp->domain_name)) {
2362 			wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2363 				   cred->roaming_partner[i].priority);
2364 			return cred->roaming_partner[i].priority;
2365 		}
2366 	}
2367 
2368 	wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2369 	return 128;
2370 }
2371 
2372 
2373 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2374 						  struct wpa_bss *selected,
2375 						  struct wpa_cred *cred)
2376 {
2377 	struct wpa_bss *bss;
2378 	u8 best_prio, prio;
2379 	struct wpa_cred *cred2;
2380 
2381 	/*
2382 	 * Check if any other BSS is operated by a more preferred roaming
2383 	 * partner.
2384 	 */
2385 
2386 	best_prio = roaming_prio(wpa_s, cred, selected);
2387 	wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2388 		   MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2389 		   cred->id);
2390 
2391 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2392 		if (bss == selected)
2393 			continue;
2394 		cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2395 		if (!cred2)
2396 			continue;
2397 		if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2398 			continue;
2399 		prio = roaming_prio(wpa_s, cred2, bss);
2400 		wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2401 			   MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2402 			   cred2->id);
2403 		if (prio < best_prio) {
2404 			int bh1, bh2, load1, load2, conn1, conn2;
2405 			bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2406 			load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2407 			conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2408 			bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2409 			load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2410 			conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2411 			wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d  new: %d %d %d",
2412 				   bh1, load1, conn1, bh2, load2, conn2);
2413 			if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2414 				wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2415 				best_prio = prio;
2416 				selected = bss;
2417 			}
2418 		}
2419 	}
2420 
2421 	return selected;
2422 }
2423 
2424 
2425 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2426 {
2427 	struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2428 	struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2429 	unsigned int count = 0;
2430 	const char *type;
2431 	int res;
2432 	struct wpa_cred *cred, *selected_cred = NULL;
2433 	struct wpa_cred *selected_home_cred = NULL;
2434 	struct wpa_cred *selected2_cred = NULL;
2435 	struct wpa_cred *selected2_home_cred = NULL;
2436 
2437 	wpa_s->network_select = 0;
2438 
2439 	wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2440 		   wpa_s->auto_select);
2441 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2442 		int excluded = 0;
2443 		int bh, bss_load, conn_capab;
2444 		cred = interworking_credentials_available(wpa_s, bss,
2445 							  &excluded);
2446 		if (!cred)
2447 			continue;
2448 
2449 		if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2450 			/*
2451 			 * We currently support only HS 2.0 networks and those
2452 			 * are required to use WPA2-Enterprise.
2453 			 */
2454 			wpa_msg(wpa_s, MSG_DEBUG,
2455 				"Interworking: Credential match with " MACSTR
2456 				" but network does not use RSN",
2457 				MAC2STR(bss->bssid));
2458 			continue;
2459 		}
2460 		if (!excluded)
2461 			count++;
2462 		res = interworking_home_sp(wpa_s, bss->anqp ?
2463 					   bss->anqp->domain_name : NULL);
2464 		if (res > 0)
2465 			type = "home";
2466 		else if (res == 0)
2467 			type = "roaming";
2468 		else
2469 			type = "unknown";
2470 		bh = cred_below_min_backhaul(wpa_s, cred, bss);
2471 		bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2472 		conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2473 		wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2474 			excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2475 			MAC2STR(bss->bssid), type,
2476 			bh ? " below_min_backhaul=1" : "",
2477 			bss_load ? " over_max_bss_load=1" : "",
2478 			conn_capab ? " conn_capab_missing=1" : "",
2479 			cred->id, cred->priority, cred->sp_priority);
2480 		if (excluded)
2481 			continue;
2482 		if (wpa_s->auto_select ||
2483 		    (wpa_s->conf->auto_interworking &&
2484 		     wpa_s->auto_network_select)) {
2485 			if (bh || bss_load || conn_capab) {
2486 				if (selected2_cred == NULL ||
2487 				    cred_prio_cmp(cred, selected2_cred) > 0) {
2488 					wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2489 					selected2 = bss;
2490 					selected2_cred = cred;
2491 				}
2492 				if (res > 0 &&
2493 				    (selected2_home_cred == NULL ||
2494 				     cred_prio_cmp(cred, selected2_home_cred) >
2495 				     0)) {
2496 					wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2497 					selected2_home = bss;
2498 					selected2_home_cred = cred;
2499 				}
2500 			} else {
2501 				if (selected_cred == NULL ||
2502 				    cred_prio_cmp(cred, selected_cred) > 0) {
2503 					wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2504 					selected = bss;
2505 					selected_cred = cred;
2506 				}
2507 				if (res > 0 &&
2508 				    (selected_home_cred == NULL ||
2509 				     cred_prio_cmp(cred, selected_home_cred) >
2510 				     0)) {
2511 					wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2512 					selected_home = bss;
2513 					selected_home_cred = cred;
2514 				}
2515 			}
2516 		}
2517 	}
2518 
2519 	if (selected_home && selected_home != selected &&
2520 	    selected_home_cred &&
2521 	    (selected_cred == NULL ||
2522 	     cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2523 		/* Prefer network operated by the Home SP */
2524 		wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2525 		selected = selected_home;
2526 		selected_cred = selected_home_cred;
2527 	}
2528 
2529 	if (!selected) {
2530 		if (selected2_home) {
2531 			wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2532 			selected = selected2_home;
2533 			selected_cred = selected2_home_cred;
2534 		} else if (selected2) {
2535 			wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2536 			selected = selected2;
2537 			selected_cred = selected2_cred;
2538 		}
2539 	}
2540 
2541 	if (count == 0) {
2542 		/*
2543 		 * No matching network was found based on configured
2544 		 * credentials. Check whether any of the enabled network blocks
2545 		 * have matching APs.
2546 		 */
2547 		if (interworking_find_network_match(wpa_s)) {
2548 			wpa_msg(wpa_s, MSG_DEBUG,
2549 				"Interworking: Possible BSS match for enabled network configurations");
2550 			if (wpa_s->auto_select) {
2551 				interworking_reconnect(wpa_s);
2552 				return;
2553 			}
2554 		}
2555 
2556 		if (wpa_s->auto_network_select) {
2557 			wpa_msg(wpa_s, MSG_DEBUG,
2558 				"Interworking: Continue scanning after ANQP fetch");
2559 			wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2560 						0);
2561 			return;
2562 		}
2563 
2564 		wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2565 			"with matching credentials found");
2566 		if (wpa_s->wpa_state == WPA_SCANNING)
2567 			wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2568 	}
2569 
2570 	if (selected) {
2571 		wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2572 			   MAC2STR(selected->bssid));
2573 		selected = pick_best_roaming_partner(wpa_s, selected,
2574 						     selected_cred);
2575 		wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2576 			   " (after best roaming partner selection)",
2577 			   MAC2STR(selected->bssid));
2578 		wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2579 			MAC2STR(selected->bssid));
2580 		interworking_connect(wpa_s, selected, 0);
2581 	} else if (wpa_s->wpa_state == WPA_SCANNING)
2582 		wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2583 }
2584 
2585 
2586 static struct wpa_bss_anqp *
2587 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2588 {
2589 	struct wpa_bss *other;
2590 
2591 	if (is_zero_ether_addr(bss->hessid))
2592 		return NULL; /* Cannot be in the same homegenous ESS */
2593 
2594 	dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2595 		if (other == bss)
2596 			continue;
2597 		if (other->anqp == NULL)
2598 			continue;
2599 		if (other->anqp->roaming_consortium == NULL &&
2600 		    other->anqp->nai_realm == NULL &&
2601 		    other->anqp->anqp_3gpp == NULL &&
2602 		    other->anqp->domain_name == NULL)
2603 			continue;
2604 		if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2605 			continue;
2606 		if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2607 			continue;
2608 		if (bss->ssid_len != other->ssid_len ||
2609 		    os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2610 			continue;
2611 
2612 		wpa_msg(wpa_s, MSG_DEBUG,
2613 			"Interworking: Share ANQP data with already fetched BSSID "
2614 			MACSTR " and " MACSTR,
2615 			MAC2STR(other->bssid), MAC2STR(bss->bssid));
2616 		other->anqp->users++;
2617 		return other->anqp;
2618 	}
2619 
2620 	return NULL;
2621 }
2622 
2623 
2624 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2625 {
2626 	struct wpa_bss *bss;
2627 	int found = 0;
2628 	const u8 *ie;
2629 
2630 	wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2631 		   "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2632 		   wpa_s->fetch_anqp_in_progress,
2633 		   wpa_s->fetch_osu_icon_in_progress);
2634 
2635 	if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2636 		wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2637 		return;
2638 	}
2639 
2640 #ifdef CONFIG_HS20
2641 	if (wpa_s->fetch_osu_icon_in_progress) {
2642 		wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2643 		hs20_next_osu_icon(wpa_s);
2644 		return;
2645 	}
2646 #endif /* CONFIG_HS20 */
2647 
2648 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2649 		if (!(bss->caps & IEEE80211_CAP_ESS))
2650 			continue;
2651 		ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
2652 		if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
2653 			continue; /* AP does not support Interworking */
2654 		if (disallowed_bssid(wpa_s, bss->bssid) ||
2655 		    disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2656 			continue; /* Disallowed BSS */
2657 
2658 		if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2659 			if (bss->anqp == NULL) {
2660 				bss->anqp = interworking_match_anqp_info(wpa_s,
2661 									 bss);
2662 				if (bss->anqp) {
2663 					/* Shared data already fetched */
2664 					continue;
2665 				}
2666 				bss->anqp = wpa_bss_anqp_alloc();
2667 				if (bss->anqp == NULL)
2668 					break;
2669 			}
2670 			found++;
2671 			bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2672 			wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2673 				MACSTR, MAC2STR(bss->bssid));
2674 			interworking_anqp_send_req(wpa_s, bss);
2675 			break;
2676 		}
2677 	}
2678 
2679 	if (found == 0) {
2680 #ifdef CONFIG_HS20
2681 		if (wpa_s->fetch_osu_info) {
2682 			if (wpa_s->num_prov_found == 0 &&
2683 			    wpa_s->fetch_osu_waiting_scan &&
2684 			    wpa_s->num_osu_scans < 3) {
2685 				wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2686 				hs20_start_osu_scan(wpa_s);
2687 				return;
2688 			}
2689 			wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2690 			hs20_osu_icon_fetch(wpa_s);
2691 			return;
2692 		}
2693 #endif /* CONFIG_HS20 */
2694 		wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2695 		wpa_s->fetch_anqp_in_progress = 0;
2696 		if (wpa_s->network_select)
2697 			interworking_select_network(wpa_s);
2698 	}
2699 }
2700 
2701 
2702 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2703 {
2704 	struct wpa_bss *bss;
2705 
2706 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2707 		bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2708 
2709 	wpa_s->fetch_anqp_in_progress = 1;
2710 
2711 	/*
2712 	 * Start actual ANQP operation from eloop call to make sure the loop
2713 	 * does not end up using excessive recursion.
2714 	 */
2715 	eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2716 }
2717 
2718 
2719 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2720 {
2721 	if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2722 		return 0;
2723 
2724 	wpa_s->network_select = 0;
2725 	wpa_s->fetch_all_anqp = 1;
2726 	wpa_s->fetch_osu_info = 0;
2727 
2728 	interworking_start_fetch_anqp(wpa_s);
2729 
2730 	return 0;
2731 }
2732 
2733 
2734 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2735 {
2736 	if (!wpa_s->fetch_anqp_in_progress)
2737 		return;
2738 
2739 	wpa_s->fetch_anqp_in_progress = 0;
2740 }
2741 
2742 
2743 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
2744 		  u16 info_ids[], size_t num_ids, u32 subtypes,
2745 		  u32 mbo_subtypes)
2746 {
2747 	struct wpabuf *buf;
2748 	struct wpabuf *extra_buf = NULL;
2749 	int ret = 0;
2750 	int freq;
2751 	struct wpa_bss *bss;
2752 	int res;
2753 
2754 	bss = wpa_bss_get_bssid(wpa_s, dst);
2755 	if (!bss) {
2756 		wpa_printf(MSG_WARNING,
2757 			   "ANQP: Cannot send query to unknown BSS "
2758 			   MACSTR, MAC2STR(dst));
2759 		return -1;
2760 	}
2761 
2762 	wpa_bss_anqp_unshare_alloc(bss);
2763 	freq = bss->freq;
2764 
2765 	wpa_msg(wpa_s, MSG_DEBUG,
2766 		"ANQP: Query Request to " MACSTR " for %u id(s)",
2767 		MAC2STR(dst), (unsigned int) num_ids);
2768 
2769 #ifdef CONFIG_HS20
2770 	if (subtypes != 0) {
2771 		extra_buf = wpabuf_alloc(100);
2772 		if (extra_buf == NULL)
2773 			return -1;
2774 		hs20_put_anqp_req(subtypes, NULL, 0, extra_buf);
2775 	}
2776 #endif /* CONFIG_HS20 */
2777 
2778 #ifdef CONFIG_MBO
2779 	if (mbo_subtypes) {
2780 		struct wpabuf *mbo;
2781 
2782 		mbo = mbo_build_anqp_buf(wpa_s, bss, mbo_subtypes);
2783 		if (mbo) {
2784 			if (wpabuf_resize(&extra_buf, wpabuf_len(mbo))) {
2785 				wpabuf_free(extra_buf);
2786 				wpabuf_free(mbo);
2787 				return -1;
2788 			}
2789 			wpabuf_put_buf(extra_buf, mbo);
2790 			wpabuf_free(mbo);
2791 		}
2792 	}
2793 #endif /* CONFIG_MBO */
2794 
2795 	buf = anqp_build_req(info_ids, num_ids, extra_buf);
2796 	wpabuf_free(extra_buf);
2797 	if (buf == NULL)
2798 		return -1;
2799 
2800 	res = gas_query_req(wpa_s->gas, dst, freq, 0, buf, anqp_resp_cb, wpa_s);
2801 	if (res < 0) {
2802 		wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
2803 		wpabuf_free(buf);
2804 		ret = -1;
2805 	} else {
2806 		wpa_msg(wpa_s, MSG_DEBUG,
2807 			"ANQP: Query started with dialog token %u", res);
2808 	}
2809 
2810 	return ret;
2811 }
2812 
2813 
2814 static void anqp_add_extra(struct wpa_supplicant *wpa_s,
2815 			   struct wpa_bss_anqp *anqp, u16 info_id,
2816 			   const u8 *data, size_t slen)
2817 {
2818 	struct wpa_bss_anqp_elem *tmp, *elem = NULL;
2819 
2820 	if (!anqp)
2821 		return;
2822 
2823 	dl_list_for_each(tmp, &anqp->anqp_elems, struct wpa_bss_anqp_elem,
2824 			 list) {
2825 		if (tmp->infoid == info_id) {
2826 			elem = tmp;
2827 			break;
2828 		}
2829 	}
2830 
2831 	if (!elem) {
2832 		elem = os_zalloc(sizeof(*elem));
2833 		if (!elem)
2834 			return;
2835 		elem->infoid = info_id;
2836 		dl_list_add(&anqp->anqp_elems, &elem->list);
2837 	} else {
2838 		wpabuf_free(elem->payload);
2839 	}
2840 
2841 	elem->payload = wpabuf_alloc_copy(data, slen);
2842 	if (!elem->payload) {
2843 		dl_list_del(&elem->list);
2844 		os_free(elem);
2845 	}
2846 }
2847 
2848 
2849 static void interworking_parse_venue_url(struct wpa_supplicant *wpa_s,
2850 					 const u8 *data, size_t len)
2851 {
2852 	const u8 *pos = data, *end = data + len;
2853 	char url[255];
2854 
2855 	while (end - pos >= 2) {
2856 		u8 slen, num;
2857 
2858 		slen = *pos++;
2859 		if (slen < 1 || slen > end - pos) {
2860 			wpa_printf(MSG_DEBUG,
2861 				   "ANQP: Truncated Venue URL Duple field");
2862 			return;
2863 		}
2864 
2865 		num = *pos++;
2866 		os_memcpy(url, pos, slen - 1);
2867 		url[slen - 1] = '\0';
2868 		wpa_msg(wpa_s, MSG_INFO, RX_VENUE_URL "%u %s", num, url);
2869 		pos += slen - 1;
2870 	}
2871 }
2872 
2873 
2874 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2875 					    struct wpa_bss *bss, const u8 *sa,
2876 					    u16 info_id,
2877 					    const u8 *data, size_t slen,
2878 					    u8 dialog_token)
2879 {
2880 	const u8 *pos = data;
2881 	struct wpa_bss_anqp *anqp = NULL;
2882 	u8 type;
2883 
2884 	if (bss)
2885 		anqp = bss->anqp;
2886 
2887 	switch (info_id) {
2888 	case ANQP_CAPABILITY_LIST:
2889 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2890 			" ANQP Capability list", MAC2STR(sa));
2891 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list",
2892 				  pos, slen);
2893 		if (anqp) {
2894 			wpabuf_free(anqp->capability_list);
2895 			anqp->capability_list = wpabuf_alloc_copy(pos, slen);
2896 		}
2897 		break;
2898 	case ANQP_VENUE_NAME:
2899 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2900 			" Venue Name", MAC2STR(sa));
2901 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2902 		if (anqp) {
2903 			wpabuf_free(anqp->venue_name);
2904 			anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2905 		}
2906 		break;
2907 	case ANQP_NETWORK_AUTH_TYPE:
2908 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2909 			" Network Authentication Type information",
2910 			MAC2STR(sa));
2911 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2912 				  "Type", pos, slen);
2913 		if (anqp) {
2914 			wpabuf_free(anqp->network_auth_type);
2915 			anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2916 		}
2917 		break;
2918 	case ANQP_ROAMING_CONSORTIUM:
2919 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2920 			" Roaming Consortium list", MAC2STR(sa));
2921 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2922 				  pos, slen);
2923 		if (anqp) {
2924 			wpabuf_free(anqp->roaming_consortium);
2925 			anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2926 		}
2927 		break;
2928 	case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2929 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2930 			" IP Address Type Availability information",
2931 			MAC2STR(sa));
2932 		wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2933 			    pos, slen);
2934 		if (anqp) {
2935 			wpabuf_free(anqp->ip_addr_type_availability);
2936 			anqp->ip_addr_type_availability =
2937 				wpabuf_alloc_copy(pos, slen);
2938 		}
2939 		break;
2940 	case ANQP_NAI_REALM:
2941 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2942 			" NAI Realm list", MAC2STR(sa));
2943 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2944 		if (anqp) {
2945 			wpabuf_free(anqp->nai_realm);
2946 			anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2947 		}
2948 		break;
2949 	case ANQP_3GPP_CELLULAR_NETWORK:
2950 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2951 			" 3GPP Cellular Network information", MAC2STR(sa));
2952 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2953 				  pos, slen);
2954 		if (anqp) {
2955 			wpabuf_free(anqp->anqp_3gpp);
2956 			anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2957 		}
2958 		break;
2959 	case ANQP_DOMAIN_NAME:
2960 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2961 			" Domain Name list", MAC2STR(sa));
2962 		wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2963 		if (anqp) {
2964 			wpabuf_free(anqp->domain_name);
2965 			anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2966 		}
2967 		break;
2968 #ifdef CONFIG_FILS
2969 	case ANQP_FILS_REALM_INFO:
2970 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2971 			" FILS Realm Information", MAC2STR(sa));
2972 		wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: FILS Realm Information",
2973 			pos, slen);
2974 		if (anqp) {
2975 			wpabuf_free(anqp->fils_realm_info);
2976 			anqp->fils_realm_info = wpabuf_alloc_copy(pos, slen);
2977 		}
2978 		break;
2979 #endif /* CONFIG_FILS */
2980 	case ANQP_VENUE_URL:
2981 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " Venue URL",
2982 			MAC2STR(sa));
2983 		anqp_add_extra(wpa_s, anqp, info_id, pos, slen);
2984 
2985 		if (!wpa_sm_pmf_enabled(wpa_s->wpa)) {
2986 			wpa_printf(MSG_DEBUG,
2987 				   "ANQP: Ignore Venue URL since PMF was not enabled");
2988 			break;
2989 		}
2990 		interworking_parse_venue_url(wpa_s, pos, slen);
2991 		break;
2992 	case ANQP_VENDOR_SPECIFIC:
2993 		if (slen < 3)
2994 			return;
2995 
2996 		switch (WPA_GET_BE24(pos)) {
2997 		case OUI_WFA:
2998 			pos += 3;
2999 			slen -= 3;
3000 
3001 			if (slen < 1)
3002 				return;
3003 			type = *pos++;
3004 			slen--;
3005 
3006 			switch (type) {
3007 #ifdef CONFIG_HS20
3008 			case HS20_ANQP_OUI_TYPE:
3009 				hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
3010 							     pos, slen,
3011 							     dialog_token);
3012 				break;
3013 #endif /* CONFIG_HS20 */
3014 #ifdef CONFIG_MBO
3015 			case MBO_ANQP_OUI_TYPE:
3016 				mbo_parse_rx_anqp_resp(wpa_s, bss, sa,
3017 						       pos, slen);
3018 				break;
3019 #endif /* CONFIG_MBO */
3020 			default:
3021 				wpa_msg(wpa_s, MSG_DEBUG,
3022 					"ANQP: Unsupported ANQP vendor type %u",
3023 					type);
3024 				break;
3025 			}
3026 			break;
3027 		default:
3028 			wpa_msg(wpa_s, MSG_DEBUG,
3029 				"Interworking: Unsupported vendor-specific ANQP OUI %06x",
3030 				WPA_GET_BE24(pos));
3031 			return;
3032 		}
3033 		break;
3034 	default:
3035 		wpa_msg(wpa_s, MSG_DEBUG,
3036 			"Interworking: Unsupported ANQP Info ID %u", info_id);
3037 		anqp_add_extra(wpa_s, anqp, info_id, data, slen);
3038 		break;
3039 	}
3040 }
3041 
3042 
3043 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
3044 		  enum gas_query_result result,
3045 		  const struct wpabuf *adv_proto,
3046 		  const struct wpabuf *resp, u16 status_code)
3047 {
3048 	struct wpa_supplicant *wpa_s = ctx;
3049 	const u8 *pos;
3050 	const u8 *end;
3051 	u16 info_id;
3052 	u16 slen;
3053 	struct wpa_bss *bss = NULL, *tmp;
3054 	const char *anqp_result = "SUCCESS";
3055 
3056 	wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
3057 		   " dialog_token=%u result=%d status_code=%u",
3058 		   MAC2STR(dst), dialog_token, result, status_code);
3059 	if (result != GAS_QUERY_SUCCESS) {
3060 #ifdef CONFIG_HS20
3061 		if (wpa_s->fetch_osu_icon_in_progress)
3062 			hs20_icon_fetch_failed(wpa_s);
3063 #endif /* CONFIG_HS20 */
3064 		anqp_result = "FAILURE";
3065 		goto out;
3066 	}
3067 
3068 	pos = wpabuf_head(adv_proto);
3069 	if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
3070 	    pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
3071 		wpa_msg(wpa_s, MSG_DEBUG,
3072 			"ANQP: Unexpected Advertisement Protocol in response");
3073 #ifdef CONFIG_HS20
3074 		if (wpa_s->fetch_osu_icon_in_progress)
3075 			hs20_icon_fetch_failed(wpa_s);
3076 #endif /* CONFIG_HS20 */
3077 		anqp_result = "INVALID_FRAME";
3078 		goto out;
3079 	}
3080 
3081 	/*
3082 	 * If possible, select the BSS entry based on which BSS entry was used
3083 	 * for the request. This can help in cases where multiple BSS entries
3084 	 * may exist for the same AP.
3085 	 */
3086 	dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
3087 		if (tmp == wpa_s->interworking_gas_bss &&
3088 		    os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
3089 			bss = tmp;
3090 			break;
3091 		}
3092 	}
3093 	if (bss == NULL)
3094 		bss = wpa_bss_get_bssid(wpa_s, dst);
3095 
3096 	pos = wpabuf_head(resp);
3097 	end = pos + wpabuf_len(resp);
3098 
3099 	while (pos < end) {
3100 		unsigned int left = end - pos;
3101 
3102 		if (left < 4) {
3103 			wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element");
3104 			anqp_result = "INVALID_FRAME";
3105 			goto out_parse_done;
3106 		}
3107 		info_id = WPA_GET_LE16(pos);
3108 		pos += 2;
3109 		slen = WPA_GET_LE16(pos);
3110 		pos += 2;
3111 		left -= 4;
3112 		if (left < slen) {
3113 			wpa_msg(wpa_s, MSG_DEBUG,
3114 				"ANQP: Invalid element length for Info ID %u",
3115 				info_id);
3116 			anqp_result = "INVALID_FRAME";
3117 			goto out_parse_done;
3118 		}
3119 		interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
3120 						slen, dialog_token);
3121 		pos += slen;
3122 	}
3123 
3124 out_parse_done:
3125 #ifdef CONFIG_HS20
3126 	hs20_notify_parse_done(wpa_s);
3127 #endif /* CONFIG_HS20 */
3128 out:
3129 	wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
3130 		MAC2STR(dst), anqp_result);
3131 }
3132 
3133 
3134 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
3135 					  struct wpa_scan_results *scan_res)
3136 {
3137 	wpa_msg(wpa_s, MSG_DEBUG,
3138 		"Interworking: Scan results available - start ANQP fetch");
3139 	interworking_start_fetch_anqp(wpa_s);
3140 }
3141 
3142 
3143 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
3144 			int *freqs)
3145 {
3146 	interworking_stop_fetch_anqp(wpa_s);
3147 	wpa_s->network_select = 1;
3148 	wpa_s->auto_network_select = 0;
3149 	wpa_s->auto_select = !!auto_select;
3150 	wpa_s->fetch_all_anqp = 0;
3151 	wpa_s->fetch_osu_info = 0;
3152 	wpa_msg(wpa_s, MSG_DEBUG,
3153 		"Interworking: Start scan for network selection");
3154 	wpa_s->scan_res_handler = interworking_scan_res_handler;
3155 	wpa_s->normal_scans = 0;
3156 	wpa_s->scan_req = MANUAL_SCAN_REQ;
3157 	os_free(wpa_s->manual_scan_freqs);
3158 	wpa_s->manual_scan_freqs = freqs;
3159 	wpa_s->after_wps = 0;
3160 	wpa_s->known_wps_freq = 0;
3161 	wpa_supplicant_req_scan(wpa_s, 0, 0);
3162 
3163 	return 0;
3164 }
3165 
3166 
3167 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
3168 			enum gas_query_result result,
3169 			const struct wpabuf *adv_proto,
3170 			const struct wpabuf *resp, u16 status_code)
3171 {
3172 	struct wpa_supplicant *wpa_s = ctx;
3173 	struct wpabuf *n;
3174 
3175 	wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
3176 		" dialog_token=%d status_code=%d resp_len=%d",
3177 		MAC2STR(addr), dialog_token, status_code,
3178 		resp ? (int) wpabuf_len(resp) : -1);
3179 	if (!resp)
3180 		return;
3181 
3182 	n = wpabuf_dup(resp);
3183 	if (n == NULL)
3184 		return;
3185 	wpabuf_free(wpa_s->prev_gas_resp);
3186 	wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
3187 	os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
3188 	wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
3189 	wpa_s->last_gas_resp = n;
3190 	os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
3191 	wpa_s->last_gas_dialog_token = dialog_token;
3192 }
3193 
3194 
3195 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
3196 		     const struct wpabuf *adv_proto,
3197 		     const struct wpabuf *query)
3198 {
3199 	struct wpabuf *buf;
3200 	int ret = 0;
3201 	int freq;
3202 	struct wpa_bss *bss;
3203 	int res;
3204 	size_t len;
3205 	u8 query_resp_len_limit = 0;
3206 
3207 	freq = wpa_s->assoc_freq;
3208 	bss = wpa_bss_get_bssid(wpa_s, dst);
3209 	if (bss)
3210 		freq = bss->freq;
3211 	if (freq <= 0)
3212 		return -1;
3213 
3214 	wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
3215 		MAC2STR(dst), freq);
3216 	wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
3217 	wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
3218 
3219 	len = 3 + wpabuf_len(adv_proto) + 2;
3220 	if (query)
3221 		len += wpabuf_len(query);
3222 	buf = gas_build_initial_req(0, len);
3223 	if (buf == NULL)
3224 		return -1;
3225 
3226 	/* Advertisement Protocol IE */
3227 	wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3228 	wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3229 	wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3230 	wpabuf_put_buf(buf, adv_proto);
3231 
3232 	/* GAS Query */
3233 	if (query) {
3234 		wpabuf_put_le16(buf, wpabuf_len(query));
3235 		wpabuf_put_buf(buf, query);
3236 	} else
3237 		wpabuf_put_le16(buf, 0);
3238 
3239 	res = gas_query_req(wpa_s->gas, dst, freq, 0, buf, gas_resp_cb, wpa_s);
3240 	if (res < 0) {
3241 		wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
3242 		wpabuf_free(buf);
3243 		ret = -1;
3244 	} else
3245 		wpa_msg(wpa_s, MSG_DEBUG,
3246 			"GAS: Query started with dialog token %u", res);
3247 
3248 	return ret;
3249 }
3250