xref: /freebsd/contrib/wpa/wpa_supplicant/interworking.c (revision d3d381b2b194b4d24853e92eecef55f262688d1a)
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 	len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
110 	for (i = 0; i < num_ids; i++)
111 		wpabuf_put_le16(buf, info_ids[i]);
112 	gas_anqp_set_element_len(buf, len_pos);
113 	if (extra)
114 		wpabuf_put_buf(buf, extra);
115 
116 	gas_anqp_set_len(buf);
117 
118 	return buf;
119 }
120 
121 
122 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
123 				      u8 dialog_token,
124 				      enum gas_query_result result,
125 				      const struct wpabuf *adv_proto,
126 				      const struct wpabuf *resp,
127 				      u16 status_code)
128 {
129 	struct wpa_supplicant *wpa_s = ctx;
130 
131 	wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR
132 		   " dialog_token=%u result=%d status_code=%u",
133 		   MAC2STR(dst), dialog_token, result, status_code);
134 	anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
135 		     status_code);
136 	interworking_next_anqp_fetch(wpa_s);
137 }
138 
139 
140 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
141 {
142 	struct wpa_cred *cred;
143 
144 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
145 		if (cred->roaming_consortium_len)
146 			return 1;
147 		if (cred->required_roaming_consortium_len)
148 			return 1;
149 	}
150 	return 0;
151 }
152 
153 
154 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
155 {
156 	struct wpa_cred *cred;
157 
158 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
159 		if (cred->pcsc || cred->imsi)
160 			return 1;
161 	}
162 	return 0;
163 }
164 
165 
166 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
167 {
168 	struct wpa_cred *cred;
169 
170 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
171 		if (cred->pcsc || cred->imsi)
172 			continue;
173 		if (!cred->eap_method)
174 			return 1;
175 		if (cred->realm && cred->roaming_consortium_len == 0)
176 			return 1;
177 	}
178 	return 0;
179 }
180 
181 
182 static int cred_with_domain(struct wpa_supplicant *wpa_s)
183 {
184 	struct wpa_cred *cred;
185 
186 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
187 		if (cred->domain || cred->pcsc || cred->imsi ||
188 		    cred->roaming_partner)
189 			return 1;
190 	}
191 	return 0;
192 }
193 
194 
195 #ifdef CONFIG_HS20
196 
197 static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s)
198 {
199 	struct wpa_cred *cred;
200 
201 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
202 		if (cred->min_dl_bandwidth_home ||
203 		    cred->min_ul_bandwidth_home ||
204 		    cred->min_dl_bandwidth_roaming ||
205 		    cred->min_ul_bandwidth_roaming)
206 			return 1;
207 	}
208 	return 0;
209 }
210 
211 
212 static int cred_with_conn_capab(struct wpa_supplicant *wpa_s)
213 {
214 	struct wpa_cred *cred;
215 
216 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
217 		if (cred->num_req_conn_capab)
218 			return 1;
219 	}
220 	return 0;
221 }
222 
223 #endif /* CONFIG_HS20 */
224 
225 
226 static int additional_roaming_consortiums(struct wpa_bss *bss)
227 {
228 	const u8 *ie;
229 	ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
230 	if (ie == NULL || ie[1] == 0)
231 		return 0;
232 	return ie[2]; /* Number of ANQP OIs */
233 }
234 
235 
236 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
237 {
238 	struct wpa_supplicant *wpa_s = eloop_ctx;
239 	interworking_next_anqp_fetch(wpa_s);
240 }
241 
242 
243 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
244 				      struct wpa_bss *bss)
245 {
246 	struct wpabuf *buf;
247 	int ret = 0;
248 	int res;
249 	u16 info_ids[8];
250 	size_t num_info_ids = 0;
251 	struct wpabuf *extra = NULL;
252 	int all = wpa_s->fetch_all_anqp;
253 
254 	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
255 		MAC2STR(bss->bssid));
256 	wpa_s->interworking_gas_bss = bss;
257 
258 	info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
259 	if (all) {
260 		info_ids[num_info_ids++] = ANQP_VENUE_NAME;
261 		info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
262 	}
263 	if (all || (cred_with_roaming_consortium(wpa_s) &&
264 		    additional_roaming_consortiums(bss)))
265 		info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
266 	if (all)
267 		info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
268 	if (all || cred_with_nai_realm(wpa_s))
269 		info_ids[num_info_ids++] = ANQP_NAI_REALM;
270 	if (all || cred_with_3gpp(wpa_s)) {
271 		info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
272 		wpa_supplicant_scard_init(wpa_s, NULL);
273 	}
274 	if (all || cred_with_domain(wpa_s))
275 		info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
276 	wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
277 		    (u8 *) info_ids, num_info_ids * 2);
278 
279 #ifdef CONFIG_HS20
280 	if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
281 		u8 *len_pos;
282 
283 		extra = wpabuf_alloc(100);
284 		if (!extra)
285 			return -1;
286 
287 		len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
288 		wpabuf_put_be24(extra, OUI_WFA);
289 		wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
290 		wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
291 		wpabuf_put_u8(extra, 0); /* Reserved */
292 		wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
293 		if (all)
294 			wpabuf_put_u8(extra,
295 				      HS20_STYPE_OPERATOR_FRIENDLY_NAME);
296 		if (all || cred_with_min_backhaul(wpa_s))
297 			wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
298 		if (all || cred_with_conn_capab(wpa_s))
299 			wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
300 		if (all)
301 			wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
302 		if (all)
303 			wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST);
304 		gas_anqp_set_element_len(extra, len_pos);
305 	}
306 #endif /* CONFIG_HS20 */
307 
308 	buf = anqp_build_req(info_ids, num_info_ids, extra);
309 	wpabuf_free(extra);
310 	if (buf == NULL)
311 		return -1;
312 
313 	res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
314 			    interworking_anqp_resp_cb, wpa_s);
315 	if (res < 0) {
316 		wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
317 		wpabuf_free(buf);
318 		ret = -1;
319 		eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
320 				       NULL);
321 	} else
322 		wpa_msg(wpa_s, MSG_DEBUG,
323 			"ANQP: Query started with dialog token %u", res);
324 
325 	return ret;
326 }
327 
328 
329 struct nai_realm_eap {
330 	u8 method;
331 	u8 inner_method;
332 	enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
333 	u8 cred_type;
334 	u8 tunneled_cred_type;
335 };
336 
337 struct nai_realm {
338 	u8 encoding;
339 	char *realm;
340 	u8 eap_count;
341 	struct nai_realm_eap *eap;
342 };
343 
344 
345 static void nai_realm_free(struct nai_realm *realms, u16 count)
346 {
347 	u16 i;
348 
349 	if (realms == NULL)
350 		return;
351 	for (i = 0; i < count; i++) {
352 		os_free(realms[i].eap);
353 		os_free(realms[i].realm);
354 	}
355 	os_free(realms);
356 }
357 
358 
359 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
360 				      const u8 *end)
361 {
362 	u8 elen, auth_count, a;
363 	const u8 *e_end;
364 
365 	if (end - pos < 3) {
366 		wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
367 		return NULL;
368 	}
369 
370 	elen = *pos++;
371 	if (elen > end - pos || elen < 2) {
372 		wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
373 		return NULL;
374 	}
375 	e_end = pos + elen;
376 	e->method = *pos++;
377 	auth_count = *pos++;
378 	wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
379 		   elen, e->method, auth_count);
380 
381 	for (a = 0; a < auth_count; a++) {
382 		u8 id, len;
383 
384 		if (end - pos < 2) {
385 			wpa_printf(MSG_DEBUG,
386 				   "No room for Authentication Parameter subfield header");
387 			return NULL;
388 		}
389 
390 		id = *pos++;
391 		len = *pos++;
392 		if (len > end - pos) {
393 			wpa_printf(MSG_DEBUG,
394 				   "No room for Authentication Parameter subfield");
395 			return NULL;
396 		}
397 
398 		switch (id) {
399 		case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
400 			if (len < 1)
401 				break;
402 			e->inner_non_eap = *pos;
403 			if (e->method != EAP_TYPE_TTLS)
404 				break;
405 			switch (*pos) {
406 			case NAI_REALM_INNER_NON_EAP_PAP:
407 				wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
408 				break;
409 			case NAI_REALM_INNER_NON_EAP_CHAP:
410 				wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
411 				break;
412 			case NAI_REALM_INNER_NON_EAP_MSCHAP:
413 				wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
414 				break;
415 			case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
416 				wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
417 				break;
418 			}
419 			break;
420 		case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
421 			if (len < 1)
422 				break;
423 			e->inner_method = *pos;
424 			wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
425 				   e->inner_method);
426 			break;
427 		case NAI_REALM_EAP_AUTH_CRED_TYPE:
428 			if (len < 1)
429 				break;
430 			e->cred_type = *pos;
431 			wpa_printf(MSG_DEBUG, "Credential Type: %u",
432 				   e->cred_type);
433 			break;
434 		case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
435 			if (len < 1)
436 				break;
437 			e->tunneled_cred_type = *pos;
438 			wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
439 				   "Type: %u", e->tunneled_cred_type);
440 			break;
441 		default:
442 			wpa_printf(MSG_DEBUG, "Unsupported Authentication "
443 				   "Parameter: id=%u len=%u", id, len);
444 			wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
445 				    "Value", pos, len);
446 			break;
447 		}
448 
449 		pos += len;
450 	}
451 
452 	return e_end;
453 }
454 
455 
456 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
457 					const u8 *end)
458 {
459 	u16 len;
460 	const u8 *f_end;
461 	u8 realm_len, e;
462 
463 	if (end - pos < 4) {
464 		wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
465 			   "fixed fields");
466 		return NULL;
467 	}
468 
469 	len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
470 	pos += 2;
471 	if (len > end - pos || len < 3) {
472 		wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
473 			   "(len=%u; left=%u)",
474 			   len, (unsigned int) (end - pos));
475 		return NULL;
476 	}
477 	f_end = pos + len;
478 
479 	r->encoding = *pos++;
480 	realm_len = *pos++;
481 	if (realm_len > f_end - pos) {
482 		wpa_printf(MSG_DEBUG, "No room for NAI Realm "
483 			   "(len=%u; left=%u)",
484 			   realm_len, (unsigned int) (f_end - pos));
485 		return NULL;
486 	}
487 	wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
488 	r->realm = dup_binstr(pos, realm_len);
489 	if (r->realm == NULL)
490 		return NULL;
491 	pos += realm_len;
492 
493 	if (f_end - pos < 1) {
494 		wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
495 		return NULL;
496 	}
497 	r->eap_count = *pos++;
498 	wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
499 	if (r->eap_count * 3 > f_end - pos) {
500 		wpa_printf(MSG_DEBUG, "No room for EAP Methods");
501 		return NULL;
502 	}
503 	r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
504 	if (r->eap == NULL)
505 		return NULL;
506 
507 	for (e = 0; e < r->eap_count; e++) {
508 		pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
509 		if (pos == NULL)
510 			return NULL;
511 	}
512 
513 	return f_end;
514 }
515 
516 
517 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
518 {
519 	struct nai_realm *realm;
520 	const u8 *pos, *end;
521 	u16 i, num;
522 	size_t left;
523 
524 	if (anqp == NULL)
525 		return NULL;
526 	left = wpabuf_len(anqp);
527 	if (left < 2)
528 		return NULL;
529 
530 	pos = wpabuf_head_u8(anqp);
531 	end = pos + left;
532 	num = WPA_GET_LE16(pos);
533 	wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
534 	pos += 2;
535 	left -= 2;
536 
537 	if (num > left / 5) {
538 		wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
539 			   "enough data (%u octets) for that many realms",
540 			   num, (unsigned int) left);
541 		return NULL;
542 	}
543 
544 	realm = os_calloc(num, sizeof(struct nai_realm));
545 	if (realm == NULL)
546 		return NULL;
547 
548 	for (i = 0; i < num; i++) {
549 		pos = nai_realm_parse_realm(&realm[i], pos, end);
550 		if (pos == NULL) {
551 			nai_realm_free(realm, num);
552 			return NULL;
553 		}
554 	}
555 
556 	*count = num;
557 	return realm;
558 }
559 
560 
561 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
562 {
563 	char *tmp, *pos, *end;
564 	int match = 0;
565 
566 	if (realm->realm == NULL || home_realm == NULL)
567 		return 0;
568 
569 	if (os_strchr(realm->realm, ';') == NULL)
570 		return os_strcasecmp(realm->realm, home_realm) == 0;
571 
572 	tmp = os_strdup(realm->realm);
573 	if (tmp == NULL)
574 		return 0;
575 
576 	pos = tmp;
577 	while (*pos) {
578 		end = os_strchr(pos, ';');
579 		if (end)
580 			*end = '\0';
581 		if (os_strcasecmp(pos, home_realm) == 0) {
582 			match = 1;
583 			break;
584 		}
585 		if (end == NULL)
586 			break;
587 		pos = end + 1;
588 	}
589 
590 	os_free(tmp);
591 
592 	return match;
593 }
594 
595 
596 static int nai_realm_cred_username(struct wpa_supplicant *wpa_s,
597 				   struct nai_realm_eap *eap)
598 {
599 	if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
600 		wpa_msg(wpa_s, MSG_DEBUG,
601 			"nai-realm-cred-username: EAP method not supported: %d",
602 			eap->method);
603 		return 0; /* method not supported */
604 	}
605 
606 	if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
607 	    eap->method != EAP_TYPE_FAST) {
608 		/* Only tunneled methods with username/password supported */
609 		wpa_msg(wpa_s, MSG_DEBUG,
610 			"nai-realm-cred-username: Method: %d is not TTLS, PEAP, or FAST",
611 			eap->method);
612 		return 0;
613 	}
614 
615 	if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) {
616 		if (eap->inner_method &&
617 		    eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
618 			wpa_msg(wpa_s, MSG_DEBUG,
619 				"nai-realm-cred-username: PEAP/FAST: Inner method not supported: %d",
620 				eap->inner_method);
621 			return 0;
622 		}
623 		if (!eap->inner_method &&
624 		    eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) {
625 			wpa_msg(wpa_s, MSG_DEBUG,
626 				"nai-realm-cred-username: MSCHAPv2 not supported");
627 			return 0;
628 		}
629 	}
630 
631 	if (eap->method == EAP_TYPE_TTLS) {
632 		if (eap->inner_method == 0 && eap->inner_non_eap == 0)
633 			return 1; /* Assume TTLS/MSCHAPv2 is used */
634 		if (eap->inner_method &&
635 		    eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
636 			wpa_msg(wpa_s, MSG_DEBUG,
637 				"nai-realm-cred-username: TTLS, but inner not supported: %d",
638 				eap->inner_method);
639 			return 0;
640 		}
641 		if (eap->inner_non_eap &&
642 		    eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
643 		    eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
644 		    eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
645 		    eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) {
646 			wpa_msg(wpa_s, MSG_DEBUG,
647 				"nai-realm-cred-username: TTLS, inner-non-eap not supported: %d",
648 				eap->inner_non_eap);
649 			return 0;
650 		}
651 	}
652 
653 	if (eap->inner_method &&
654 	    eap->inner_method != EAP_TYPE_GTC &&
655 	    eap->inner_method != EAP_TYPE_MSCHAPV2) {
656 		wpa_msg(wpa_s, MSG_DEBUG,
657 			"nai-realm-cred-username: inner-method not GTC or MSCHAPv2: %d",
658 			eap->inner_method);
659 		return 0;
660 	}
661 
662 	return 1;
663 }
664 
665 
666 static int nai_realm_cred_cert(struct wpa_supplicant *wpa_s,
667 			       struct nai_realm_eap *eap)
668 {
669 	if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
670 		wpa_msg(wpa_s, MSG_DEBUG,
671 			"nai-realm-cred-cert: Method not supported: %d",
672 			eap->method);
673 		return 0; /* method not supported */
674 	}
675 
676 	if (eap->method != EAP_TYPE_TLS) {
677 		/* Only EAP-TLS supported for credential authentication */
678 		wpa_msg(wpa_s, MSG_DEBUG,
679 			"nai-realm-cred-cert: Method not TLS: %d",
680 			eap->method);
681 		return 0;
682 	}
683 
684 	return 1;
685 }
686 
687 
688 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s,
689 						 struct wpa_cred *cred,
690 						 struct nai_realm *realm)
691 {
692 	u8 e;
693 
694 	if (cred->username == NULL ||
695 	    cred->username[0] == '\0' ||
696 	    ((cred->password == NULL ||
697 	      cred->password[0] == '\0') &&
698 	     (cred->private_key == NULL ||
699 	      cred->private_key[0] == '\0'))) {
700 		wpa_msg(wpa_s, MSG_DEBUG,
701 			"nai-realm-find-eap: incomplete cred info: username: %s  password: %s private_key: %s",
702 			cred->username ? cred->username : "NULL",
703 			cred->password ? cred->password : "NULL",
704 			cred->private_key ? cred->private_key : "NULL");
705 		return NULL;
706 	}
707 
708 	for (e = 0; e < realm->eap_count; e++) {
709 		struct nai_realm_eap *eap = &realm->eap[e];
710 		if (cred->password && cred->password[0] &&
711 		    nai_realm_cred_username(wpa_s, eap))
712 			return eap;
713 		if (cred->private_key && cred->private_key[0] &&
714 		    nai_realm_cred_cert(wpa_s, eap))
715 			return eap;
716 	}
717 
718 	return NULL;
719 }
720 
721 
722 #ifdef INTERWORKING_3GPP
723 
724 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
725 {
726 	u8 plmn[3], plmn2[3];
727 	const u8 *pos, *end;
728 	u8 udhl;
729 
730 	/*
731 	 * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
732 	 * operator is allowed to include only two digits of the MNC, so allow
733 	 * matches based on both two and three digit MNC assumptions. Since some
734 	 * SIM/USIM cards may not expose MNC length conveniently, we may be
735 	 * provided the default MNC length 3 here and as such, checking with MNC
736 	 * length 2 is justifiable even though 3GPP TS 24.234 does not mention
737 	 * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
738 	 * with otherwise matching values would not be good idea in general, so
739 	 * this should not result in selecting incorrect networks.
740 	 */
741 	/* Match with 3 digit MNC */
742 	plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
743 	plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
744 	plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
745 	/* Match with 2 digit MNC */
746 	plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
747 	plmn2[1] = (imsi[2] - '0') | 0xf0;
748 	plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
749 
750 	if (anqp == NULL)
751 		return 0;
752 	pos = wpabuf_head_u8(anqp);
753 	end = pos + wpabuf_len(anqp);
754 	if (end - pos < 2)
755 		return 0;
756 	if (*pos != 0) {
757 		wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
758 		return 0;
759 	}
760 	pos++;
761 	udhl = *pos++;
762 	if (udhl > end - pos) {
763 		wpa_printf(MSG_DEBUG, "Invalid UDHL");
764 		return 0;
765 	}
766 	end = pos + udhl;
767 
768 	wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
769 		   plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
770 		   imsi, mnc_len);
771 
772 	while (end - pos >= 2) {
773 		u8 iei, len;
774 		const u8 *l_end;
775 		iei = *pos++;
776 		len = *pos++ & 0x7f;
777 		if (len > end - pos)
778 			break;
779 		l_end = pos + len;
780 
781 		if (iei == 0 && len > 0) {
782 			/* PLMN List */
783 			u8 num, i;
784 			wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
785 				    pos, len);
786 			num = *pos++;
787 			for (i = 0; i < num; i++) {
788 				if (l_end - pos < 3)
789 					break;
790 				if (os_memcmp(pos, plmn, 3) == 0 ||
791 				    os_memcmp(pos, plmn2, 3) == 0)
792 					return 1; /* Found matching PLMN */
793 				pos += 3;
794 			}
795 		} else {
796 			wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
797 				    pos, len);
798 		}
799 
800 		pos = l_end;
801 	}
802 
803 	return 0;
804 }
805 
806 
807 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
808 			  size_t mnc_len, char prefix)
809 {
810 	const char *sep, *msin;
811 	char *end, *pos;
812 	size_t msin_len, plmn_len;
813 
814 	/*
815 	 * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
816 	 * Root NAI:
817 	 * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
818 	 * <MNC> is zero-padded to three digits in case two-digit MNC is used
819 	 */
820 
821 	if (imsi == NULL || os_strlen(imsi) > 16) {
822 		wpa_printf(MSG_DEBUG, "No valid IMSI available");
823 		return -1;
824 	}
825 	sep = os_strchr(imsi, '-');
826 	if (sep) {
827 		plmn_len = sep - imsi;
828 		msin = sep + 1;
829 	} else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
830 		plmn_len = 3 + mnc_len;
831 		msin = imsi + plmn_len;
832 	} else
833 		return -1;
834 	if (plmn_len != 5 && plmn_len != 6)
835 		return -1;
836 	msin_len = os_strlen(msin);
837 
838 	pos = nai;
839 	end = nai + nai_len;
840 	if (prefix)
841 		*pos++ = prefix;
842 	os_memcpy(pos, imsi, plmn_len);
843 	pos += plmn_len;
844 	os_memcpy(pos, msin, msin_len);
845 	pos += msin_len;
846 	pos += os_snprintf(pos, end - pos, "@wlan.mnc");
847 	if (plmn_len == 5) {
848 		*pos++ = '0';
849 		*pos++ = imsi[3];
850 		*pos++ = imsi[4];
851 	} else {
852 		*pos++ = imsi[3];
853 		*pos++ = imsi[4];
854 		*pos++ = imsi[5];
855 	}
856 	os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
857 		    imsi[0], imsi[1], imsi[2]);
858 
859 	return 0;
860 }
861 
862 
863 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
864 {
865 	char nai[100];
866 	if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
867 		return -1;
868 	return wpa_config_set_quoted(ssid, "identity", nai);
869 }
870 
871 #endif /* INTERWORKING_3GPP */
872 
873 
874 static int already_connected(struct wpa_supplicant *wpa_s,
875 			     struct wpa_cred *cred, struct wpa_bss *bss)
876 {
877 	struct wpa_ssid *ssid, *sel_ssid;
878 	struct wpa_bss *selected;
879 
880 	if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL)
881 		return 0;
882 
883 	ssid = wpa_s->current_ssid;
884 	if (ssid->parent_cred != cred)
885 		return 0;
886 
887 	if (ssid->ssid_len != bss->ssid_len ||
888 	    os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
889 		return 0;
890 
891 	sel_ssid = NULL;
892 	selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid);
893 	if (selected && sel_ssid && sel_ssid->priority > ssid->priority)
894 		return 0; /* higher priority network in scan results */
895 
896 	return 1;
897 }
898 
899 
900 static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
901 				     struct wpa_cred *cred,
902 				     struct wpa_bss *bss)
903 {
904 	struct wpa_ssid *ssid;
905 
906 	for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
907 		if (ssid->parent_cred != cred)
908 			continue;
909 		if (ssid->ssid_len != bss->ssid_len ||
910 		    os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
911 			continue;
912 
913 		break;
914 	}
915 
916 	if (ssid == NULL)
917 		return;
918 
919 	wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
920 
921 	if (ssid == wpa_s->current_ssid) {
922 		wpa_sm_set_config(wpa_s->wpa, NULL);
923 		eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
924 		wpa_s->own_disconnect_req = 1;
925 		wpa_supplicant_deauthenticate(wpa_s,
926 					      WLAN_REASON_DEAUTH_LEAVING);
927 	}
928 
929 	wpas_notify_network_removed(wpa_s, ssid);
930 	wpa_config_remove_network(wpa_s->conf, ssid->id);
931 }
932 
933 
934 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
935 					struct wpa_ssid *ssid)
936 {
937 	const char *key_mgmt = NULL;
938 #ifdef CONFIG_IEEE80211R
939 	int res;
940 	struct wpa_driver_capa capa;
941 
942 	res = wpa_drv_get_capa(wpa_s, &capa);
943 	if (res == 0 && capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_FT) {
944 		key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
945 			"WPA-EAP WPA-EAP-SHA256 FT-EAP" :
946 			"WPA-EAP FT-EAP";
947 	}
948 #endif /* CONFIG_IEEE80211R */
949 
950 	if (!key_mgmt)
951 		key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
952 			"WPA-EAP WPA-EAP-SHA256" : "WPA-EAP";
953 	if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0 ||
954 	    wpa_config_set(ssid, "proto", "RSN", 0) < 0 ||
955 	    wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
956 		return -1;
957 	return 0;
958 }
959 
960 
961 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
962 				     struct wpa_cred *cred,
963 				     struct wpa_bss *bss, int only_add)
964 {
965 #ifdef INTERWORKING_3GPP
966 	struct wpa_ssid *ssid;
967 	int eap_type;
968 	int res;
969 	char prefix;
970 
971 	if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
972 		return -1;
973 
974 	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
975 		" (3GPP)", MAC2STR(bss->bssid));
976 
977 	if (already_connected(wpa_s, cred, bss)) {
978 		wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
979 			MAC2STR(bss->bssid));
980 		return wpa_s->current_ssid->id;
981 	}
982 
983 	remove_duplicate_network(wpa_s, cred, bss);
984 
985 	ssid = wpa_config_add_network(wpa_s->conf);
986 	if (ssid == NULL)
987 		return -1;
988 	ssid->parent_cred = cred;
989 
990 	wpas_notify_network_added(wpa_s, ssid);
991 	wpa_config_set_network_defaults(ssid);
992 	ssid->priority = cred->priority;
993 	ssid->temporary = 1;
994 	ssid->ssid = os_zalloc(bss->ssid_len + 1);
995 	if (ssid->ssid == NULL)
996 		goto fail;
997 	os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
998 	ssid->ssid_len = bss->ssid_len;
999 	ssid->eap.sim_num = cred->sim_num;
1000 
1001 	if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1002 		goto fail;
1003 
1004 	eap_type = EAP_TYPE_SIM;
1005 	if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
1006 		eap_type = EAP_TYPE_AKA;
1007 	if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
1008 		if (cred->eap_method[0].method == EAP_TYPE_SIM ||
1009 		    cred->eap_method[0].method == EAP_TYPE_AKA ||
1010 		    cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
1011 			eap_type = cred->eap_method[0].method;
1012 	}
1013 
1014 	switch (eap_type) {
1015 	case EAP_TYPE_SIM:
1016 		prefix = '1';
1017 		res = wpa_config_set(ssid, "eap", "SIM", 0);
1018 		break;
1019 	case EAP_TYPE_AKA:
1020 		prefix = '0';
1021 		res = wpa_config_set(ssid, "eap", "AKA", 0);
1022 		break;
1023 	case EAP_TYPE_AKA_PRIME:
1024 		prefix = '6';
1025 		res = wpa_config_set(ssid, "eap", "AKA'", 0);
1026 		break;
1027 	default:
1028 		res = -1;
1029 		break;
1030 	}
1031 	if (res < 0) {
1032 		wpa_msg(wpa_s, MSG_DEBUG,
1033 			"Selected EAP method (%d) not supported", eap_type);
1034 		goto fail;
1035 	}
1036 
1037 	if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
1038 		wpa_msg(wpa_s, MSG_DEBUG, "Failed to set Root NAI");
1039 		goto fail;
1040 	}
1041 
1042 	if (cred->milenage && cred->milenage[0]) {
1043 		if (wpa_config_set_quoted(ssid, "password",
1044 					  cred->milenage) < 0)
1045 			goto fail;
1046 	} else if (cred->pcsc) {
1047 		if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
1048 			goto fail;
1049 		if (wpa_s->conf->pcsc_pin &&
1050 		    wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
1051 		    < 0)
1052 			goto fail;
1053 	}
1054 
1055 	wpa_s->next_ssid = ssid;
1056 	wpa_config_update_prio_list(wpa_s->conf);
1057 	if (!only_add)
1058 		interworking_reconnect(wpa_s);
1059 
1060 	return ssid->id;
1061 
1062 fail:
1063 	wpas_notify_network_removed(wpa_s, ssid);
1064 	wpa_config_remove_network(wpa_s->conf, ssid->id);
1065 #endif /* INTERWORKING_3GPP */
1066 	return -1;
1067 }
1068 
1069 
1070 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
1071 					    size_t rc_len)
1072 {
1073 	const u8 *pos, *end;
1074 	u8 lens;
1075 
1076 	if (ie == NULL)
1077 		return 0;
1078 
1079 	pos = ie + 2;
1080 	end = ie + 2 + ie[1];
1081 
1082 	/* Roaming Consortium element:
1083 	 * Number of ANQP OIs
1084 	 * OI #1 and #2 lengths
1085 	 * OI #1, [OI #2], [OI #3]
1086 	 */
1087 
1088 	if (end - pos < 2)
1089 		return 0;
1090 
1091 	pos++; /* skip Number of ANQP OIs */
1092 	lens = *pos++;
1093 	if ((lens & 0x0f) + (lens >> 4) > end - pos)
1094 		return 0;
1095 
1096 	if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1097 		return 1;
1098 	pos += lens & 0x0f;
1099 
1100 	if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1101 		return 1;
1102 	pos += lens >> 4;
1103 
1104 	if (pos < end && (size_t) (end - pos) == rc_len &&
1105 	    os_memcmp(pos, rc_id, rc_len) == 0)
1106 		return 1;
1107 
1108 	return 0;
1109 }
1110 
1111 
1112 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
1113 					 const u8 *rc_id, size_t rc_len)
1114 {
1115 	const u8 *pos, *end;
1116 	u8 len;
1117 
1118 	if (anqp == NULL)
1119 		return 0;
1120 
1121 	pos = wpabuf_head(anqp);
1122 	end = pos + wpabuf_len(anqp);
1123 
1124 	/* Set of <OI Length, OI> duples */
1125 	while (pos < end) {
1126 		len = *pos++;
1127 		if (len > end - pos)
1128 			break;
1129 		if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1130 			return 1;
1131 		pos += len;
1132 	}
1133 
1134 	return 0;
1135 }
1136 
1137 
1138 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
1139 				    const u8 *rc_id, size_t rc_len)
1140 {
1141 	return roaming_consortium_element_match(ie, rc_id, rc_len) ||
1142 		roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1143 }
1144 
1145 
1146 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1147 {
1148 	const u8 *ie;
1149 
1150 	if (cred->required_roaming_consortium_len == 0)
1151 		return 0;
1152 
1153 	ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1154 
1155 	if (ie == NULL &&
1156 	    (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1157 		return 1;
1158 
1159 	return !roaming_consortium_match(ie,
1160 					 bss->anqp ?
1161 					 bss->anqp->roaming_consortium : NULL,
1162 					 cred->required_roaming_consortium,
1163 					 cred->required_roaming_consortium_len);
1164 }
1165 
1166 
1167 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1168 {
1169 	size_t i;
1170 
1171 	if (!cred->excluded_ssid)
1172 		return 0;
1173 
1174 	for (i = 0; i < cred->num_excluded_ssid; i++) {
1175 		struct excluded_ssid *e = &cred->excluded_ssid[i];
1176 		if (bss->ssid_len == e->ssid_len &&
1177 		    os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1178 			return 1;
1179 	}
1180 
1181 	return 0;
1182 }
1183 
1184 
1185 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
1186 				   struct wpa_cred *cred, struct wpa_bss *bss)
1187 {
1188 #ifdef CONFIG_HS20
1189 	int res;
1190 	unsigned int dl_bandwidth, ul_bandwidth;
1191 	const u8 *wan;
1192 	u8 wan_info, dl_load, ul_load;
1193 	u16 lmd;
1194 	u32 ul_speed, dl_speed;
1195 
1196 	if (!cred->min_dl_bandwidth_home &&
1197 	    !cred->min_ul_bandwidth_home &&
1198 	    !cred->min_dl_bandwidth_roaming &&
1199 	    !cred->min_ul_bandwidth_roaming)
1200 		return 0; /* No bandwidth constraint specified */
1201 
1202 	if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL)
1203 		return 0; /* No WAN Metrics known - ignore constraint */
1204 
1205 	wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
1206 	wan_info = wan[0];
1207 	if (wan_info & BIT(3))
1208 		return 1; /* WAN link at capacity */
1209 	lmd = WPA_GET_LE16(wan + 11);
1210 	if (lmd == 0)
1211 		return 0; /* Downlink/Uplink Load was not measured */
1212 	dl_speed = WPA_GET_LE32(wan + 1);
1213 	ul_speed = WPA_GET_LE32(wan + 5);
1214 	dl_load = wan[9];
1215 	ul_load = wan[10];
1216 
1217 	if (dl_speed >= 0xffffff)
1218 		dl_bandwidth = dl_speed / 255 * (255 - dl_load);
1219 	else
1220 		dl_bandwidth = dl_speed * (255 - dl_load) / 255;
1221 
1222 	if (ul_speed >= 0xffffff)
1223 		ul_bandwidth = ul_speed / 255 * (255 - ul_load);
1224 	else
1225 		ul_bandwidth = ul_speed * (255 - ul_load) / 255;
1226 
1227 	res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1228 					bss->anqp->domain_name : NULL);
1229 	if (res > 0) {
1230 		if (cred->min_dl_bandwidth_home > dl_bandwidth)
1231 			return 1;
1232 		if (cred->min_ul_bandwidth_home > ul_bandwidth)
1233 			return 1;
1234 	} else {
1235 		if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
1236 			return 1;
1237 		if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
1238 			return 1;
1239 	}
1240 #endif /* CONFIG_HS20 */
1241 
1242 	return 0;
1243 }
1244 
1245 
1246 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
1247 				  struct wpa_cred *cred, struct wpa_bss *bss)
1248 {
1249 	const u8 *ie;
1250 	int res;
1251 
1252 	if (!cred->max_bss_load)
1253 		return 0; /* No BSS Load constraint specified */
1254 
1255 	ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
1256 	if (ie == NULL || ie[1] < 3)
1257 		return 0; /* No BSS Load advertised */
1258 
1259 	res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1260 					bss->anqp->domain_name : NULL);
1261 	if (res <= 0)
1262 		return 0; /* Not a home network */
1263 
1264 	return ie[4] > cred->max_bss_load;
1265 }
1266 
1267 
1268 #ifdef CONFIG_HS20
1269 
1270 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto)
1271 {
1272 	while (end - pos >= 4) {
1273 		if (pos[0] == proto && pos[3] == 1 /* Open */)
1274 			return 1;
1275 		pos += 4;
1276 	}
1277 
1278 	return 0;
1279 }
1280 
1281 
1282 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto,
1283 				u16 port)
1284 {
1285 	while (end - pos >= 4) {
1286 		if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
1287 		    pos[3] == 1 /* Open */)
1288 			return 1;
1289 		pos += 4;
1290 	}
1291 
1292 	return 0;
1293 }
1294 
1295 #endif /* CONFIG_HS20 */
1296 
1297 
1298 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
1299 				   struct wpa_cred *cred, struct wpa_bss *bss)
1300 {
1301 #ifdef CONFIG_HS20
1302 	int res;
1303 	const u8 *capab, *end;
1304 	unsigned int i, j;
1305 	int *ports;
1306 
1307 	if (!cred->num_req_conn_capab)
1308 		return 0; /* No connection capability constraint specified */
1309 
1310 	if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL)
1311 		return 0; /* No Connection Capability known - ignore constraint
1312 			   */
1313 
1314 	res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1315 					bss->anqp->domain_name : NULL);
1316 	if (res > 0)
1317 		return 0; /* No constraint in home network */
1318 
1319 	capab = wpabuf_head(bss->anqp->hs20_connection_capability);
1320 	end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
1321 
1322 	for (i = 0; i < cred->num_req_conn_capab; i++) {
1323 		ports = cred->req_conn_capab_port[i];
1324 		if (!ports) {
1325 			if (!has_proto_match(capab, end,
1326 					     cred->req_conn_capab_proto[i]))
1327 				return 1;
1328 		} else {
1329 			for (j = 0; ports[j] > -1; j++) {
1330 				if (!has_proto_port_match(
1331 					    capab, end,
1332 					    cred->req_conn_capab_proto[i],
1333 					    ports[j]))
1334 					return 1;
1335 			}
1336 		}
1337 	}
1338 #endif /* CONFIG_HS20 */
1339 
1340 	return 0;
1341 }
1342 
1343 
1344 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1345 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1346 	int *excluded)
1347 {
1348 	struct wpa_cred *cred, *selected = NULL;
1349 	const u8 *ie;
1350 	int is_excluded = 0;
1351 
1352 	ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1353 
1354 	if (ie == NULL &&
1355 	    (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1356 		return NULL;
1357 
1358 	if (wpa_s->conf->cred == NULL)
1359 		return NULL;
1360 
1361 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1362 		if (cred->roaming_consortium_len == 0)
1363 			continue;
1364 
1365 		if (!roaming_consortium_match(ie,
1366 					      bss->anqp ?
1367 					      bss->anqp->roaming_consortium :
1368 					      NULL,
1369 					      cred->roaming_consortium,
1370 					      cred->roaming_consortium_len))
1371 			continue;
1372 
1373 		if (cred_no_required_oi_match(cred, bss))
1374 			continue;
1375 		if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1376 			continue;
1377 		if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1378 			continue;
1379 		if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1380 			continue;
1381 		if (cred_excluded_ssid(cred, bss)) {
1382 			if (excluded == NULL)
1383 				continue;
1384 			if (selected == NULL) {
1385 				selected = cred;
1386 				is_excluded = 1;
1387 			}
1388 		} else {
1389 			if (selected == NULL || is_excluded ||
1390 			    cred_prio_cmp(selected, cred) < 0) {
1391 				selected = cred;
1392 				is_excluded = 0;
1393 			}
1394 		}
1395 	}
1396 
1397 	if (excluded)
1398 		*excluded = is_excluded;
1399 
1400 	return selected;
1401 }
1402 
1403 
1404 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1405 				       struct wpa_cred *cred, int ttls)
1406 {
1407 	if (cred->eap_method) {
1408 		ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1409 			cred->eap_method->method == EAP_TYPE_TTLS;
1410 
1411 		os_free(ssid->eap.eap_methods);
1412 		ssid->eap.eap_methods =
1413 			os_malloc(sizeof(struct eap_method_type) * 2);
1414 		if (ssid->eap.eap_methods == NULL)
1415 			return -1;
1416 		os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1417 			  sizeof(*cred->eap_method));
1418 		ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1419 		ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1420 	}
1421 
1422 	if (ttls && cred->username && cred->username[0]) {
1423 		const char *pos;
1424 		char *anon;
1425 		/* Use anonymous NAI in Phase 1 */
1426 		pos = os_strchr(cred->username, '@');
1427 		if (pos) {
1428 			size_t buflen = 9 + os_strlen(pos) + 1;
1429 			anon = os_malloc(buflen);
1430 			if (anon == NULL)
1431 				return -1;
1432 			os_snprintf(anon, buflen, "anonymous%s", pos);
1433 		} else if (cred->realm) {
1434 			size_t buflen = 10 + os_strlen(cred->realm) + 1;
1435 			anon = os_malloc(buflen);
1436 			if (anon == NULL)
1437 				return -1;
1438 			os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1439 		} else {
1440 			anon = os_strdup("anonymous");
1441 			if (anon == NULL)
1442 				return -1;
1443 		}
1444 		if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1445 		    0) {
1446 			os_free(anon);
1447 			return -1;
1448 		}
1449 		os_free(anon);
1450 	}
1451 
1452 	if (!ttls && cred->username && cred->username[0] && cred->realm &&
1453 	    !os_strchr(cred->username, '@')) {
1454 		char *id;
1455 		size_t buflen;
1456 		int res;
1457 
1458 		buflen = os_strlen(cred->username) + 1 +
1459 			os_strlen(cred->realm) + 1;
1460 
1461 		id = os_malloc(buflen);
1462 		if (!id)
1463 			return -1;
1464 		os_snprintf(id, buflen, "%s@%s", cred->username, cred->realm);
1465 		res = wpa_config_set_quoted(ssid, "identity", id);
1466 		os_free(id);
1467 		if (res < 0)
1468 			return -1;
1469 	} else if (cred->username && cred->username[0] &&
1470 	    wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1471 		return -1;
1472 
1473 	if (cred->password && cred->password[0]) {
1474 		if (cred->ext_password &&
1475 		    wpa_config_set(ssid, "password", cred->password, 0) < 0)
1476 			return -1;
1477 		if (!cred->ext_password &&
1478 		    wpa_config_set_quoted(ssid, "password", cred->password) <
1479 		    0)
1480 			return -1;
1481 	}
1482 
1483 	if (cred->client_cert && cred->client_cert[0] &&
1484 	    wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1485 		return -1;
1486 
1487 #ifdef ANDROID
1488 	if (cred->private_key &&
1489 	    os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1490 		/* Use OpenSSL engine configuration for Android keystore */
1491 		if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1492 		    wpa_config_set_quoted(ssid, "key_id",
1493 					  cred->private_key + 11) < 0 ||
1494 		    wpa_config_set(ssid, "engine", "1", 0) < 0)
1495 			return -1;
1496 	} else
1497 #endif /* ANDROID */
1498 	if (cred->private_key && cred->private_key[0] &&
1499 	    wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1500 		return -1;
1501 
1502 	if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1503 	    wpa_config_set_quoted(ssid, "private_key_passwd",
1504 				  cred->private_key_passwd) < 0)
1505 		return -1;
1506 
1507 	if (cred->phase1) {
1508 		os_free(ssid->eap.phase1);
1509 		ssid->eap.phase1 = os_strdup(cred->phase1);
1510 	}
1511 	if (cred->phase2) {
1512 		os_free(ssid->eap.phase2);
1513 		ssid->eap.phase2 = os_strdup(cred->phase2);
1514 	}
1515 
1516 	if (cred->ca_cert && cred->ca_cert[0] &&
1517 	    wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1518 		return -1;
1519 
1520 	if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1521 	    wpa_config_set_quoted(ssid, "domain_suffix_match",
1522 				  cred->domain_suffix_match) < 0)
1523 		return -1;
1524 
1525 	ssid->eap.ocsp = cred->ocsp;
1526 
1527 	return 0;
1528 }
1529 
1530 
1531 static int interworking_connect_roaming_consortium(
1532 	struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1533 	struct wpa_bss *bss, int only_add)
1534 {
1535 	struct wpa_ssid *ssid;
1536 
1537 	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
1538 		" based on roaming consortium match", MAC2STR(bss->bssid));
1539 
1540 	if (already_connected(wpa_s, cred, bss)) {
1541 		wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1542 			MAC2STR(bss->bssid));
1543 		return wpa_s->current_ssid->id;
1544 	}
1545 
1546 	remove_duplicate_network(wpa_s, cred, bss);
1547 
1548 	ssid = wpa_config_add_network(wpa_s->conf);
1549 	if (ssid == NULL)
1550 		return -1;
1551 	ssid->parent_cred = cred;
1552 	wpas_notify_network_added(wpa_s, ssid);
1553 	wpa_config_set_network_defaults(ssid);
1554 	ssid->priority = cred->priority;
1555 	ssid->temporary = 1;
1556 	ssid->ssid = os_zalloc(bss->ssid_len + 1);
1557 	if (ssid->ssid == NULL)
1558 		goto fail;
1559 	os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1560 	ssid->ssid_len = bss->ssid_len;
1561 
1562 	if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1563 		goto fail;
1564 
1565 	if (cred->eap_method == NULL) {
1566 		wpa_msg(wpa_s, MSG_DEBUG,
1567 			"Interworking: No EAP method set for credential using roaming consortium");
1568 		goto fail;
1569 	}
1570 
1571 	if (interworking_set_eap_params(
1572 		    ssid, cred,
1573 		    cred->eap_method->vendor == EAP_VENDOR_IETF &&
1574 		    cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1575 		goto fail;
1576 
1577 	wpa_s->next_ssid = ssid;
1578 	wpa_config_update_prio_list(wpa_s->conf);
1579 	if (!only_add)
1580 		interworking_reconnect(wpa_s);
1581 
1582 	return ssid->id;
1583 
1584 fail:
1585 	wpas_notify_network_removed(wpa_s, ssid);
1586 	wpa_config_remove_network(wpa_s->conf, ssid->id);
1587 	return -1;
1588 }
1589 
1590 
1591 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
1592 			 int only_add)
1593 {
1594 	struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1595 	struct wpa_ssid *ssid;
1596 	struct nai_realm *realm;
1597 	struct nai_realm_eap *eap = NULL;
1598 	u16 count, i;
1599 	char buf[100];
1600 	int excluded = 0, *excl = &excluded;
1601 	const char *name;
1602 
1603 	if (wpa_s->conf->cred == NULL || bss == NULL)
1604 		return -1;
1605 	if (disallowed_bssid(wpa_s, bss->bssid) ||
1606 	    disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1607 		wpa_msg(wpa_s, MSG_DEBUG,
1608 			"Interworking: Reject connection to disallowed BSS "
1609 			MACSTR, MAC2STR(bss->bssid));
1610 		return -1;
1611 	}
1612 
1613 	wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1614 		   " for connection",
1615 		   MAC2STR(bss->bssid));
1616 
1617 	if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1618 		/*
1619 		 * We currently support only HS 2.0 networks and those are
1620 		 * required to use WPA2-Enterprise.
1621 		 */
1622 		wpa_msg(wpa_s, MSG_DEBUG,
1623 			"Interworking: Network does not use RSN");
1624 		return -1;
1625 	}
1626 
1627 	cred_rc = interworking_credentials_available_roaming_consortium(
1628 		wpa_s, bss, 0, excl);
1629 	if (cred_rc) {
1630 		wpa_msg(wpa_s, MSG_DEBUG,
1631 			"Interworking: Highest roaming consortium matching credential priority %d sp_priority %d",
1632 			cred_rc->priority, cred_rc->sp_priority);
1633 		if (excl && !(*excl))
1634 			excl = NULL;
1635 	}
1636 
1637 	cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1638 	if (cred) {
1639 		wpa_msg(wpa_s, MSG_DEBUG,
1640 			"Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d",
1641 			cred->priority, cred->sp_priority);
1642 		if (excl && !(*excl))
1643 			excl = NULL;
1644 	}
1645 
1646 	cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1647 							    excl);
1648 	if (cred_3gpp) {
1649 		wpa_msg(wpa_s, MSG_DEBUG,
1650 			"Interworking: Highest 3GPP matching credential priority %d sp_priority %d",
1651 			cred_3gpp->priority, cred_3gpp->sp_priority);
1652 		if (excl && !(*excl))
1653 			excl = NULL;
1654 	}
1655 
1656 	if (!cred_rc && !cred && !cred_3gpp) {
1657 		wpa_msg(wpa_s, MSG_DEBUG,
1658 			"Interworking: No full credential matches - consider options without BW(etc.) limits");
1659 		cred_rc = interworking_credentials_available_roaming_consortium(
1660 			wpa_s, bss, 1, excl);
1661 		if (cred_rc) {
1662 			wpa_msg(wpa_s, MSG_DEBUG,
1663 				"Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)",
1664 				cred_rc->priority, cred_rc->sp_priority);
1665 			if (excl && !(*excl))
1666 				excl = NULL;
1667 		}
1668 
1669 		cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1670 								excl);
1671 		if (cred) {
1672 			wpa_msg(wpa_s, MSG_DEBUG,
1673 				"Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)",
1674 				cred->priority, cred->sp_priority);
1675 			if (excl && !(*excl))
1676 				excl = NULL;
1677 		}
1678 
1679 		cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1680 								    1, excl);
1681 		if (cred_3gpp) {
1682 			wpa_msg(wpa_s, MSG_DEBUG,
1683 				"Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)",
1684 				cred_3gpp->priority, cred_3gpp->sp_priority);
1685 			if (excl && !(*excl))
1686 				excl = NULL;
1687 		}
1688 	}
1689 
1690 	if (cred_rc &&
1691 	    (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1692 	    (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1693 		return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1694 							       bss, only_add);
1695 
1696 	if (cred_3gpp &&
1697 	    (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1698 		return interworking_connect_3gpp(wpa_s, cred_3gpp, bss,
1699 						 only_add);
1700 	}
1701 
1702 	if (cred == NULL) {
1703 		wpa_msg(wpa_s, MSG_DEBUG,
1704 			"Interworking: No matching credentials found for "
1705 			MACSTR, MAC2STR(bss->bssid));
1706 		return -1;
1707 	}
1708 
1709 	realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1710 				&count);
1711 	if (realm == NULL) {
1712 		wpa_msg(wpa_s, MSG_DEBUG,
1713 			"Interworking: Could not parse NAI Realm list from "
1714 			MACSTR, MAC2STR(bss->bssid));
1715 		return -1;
1716 	}
1717 
1718 	for (i = 0; i < count; i++) {
1719 		if (!nai_realm_match(&realm[i], cred->realm))
1720 			continue;
1721 		eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1722 		if (eap)
1723 			break;
1724 	}
1725 
1726 	if (!eap) {
1727 		wpa_msg(wpa_s, MSG_DEBUG,
1728 			"Interworking: No matching credentials and EAP method found for "
1729 			MACSTR, MAC2STR(bss->bssid));
1730 		nai_realm_free(realm, count);
1731 		return -1;
1732 	}
1733 
1734 	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR,
1735 		MAC2STR(bss->bssid));
1736 
1737 	if (already_connected(wpa_s, cred, bss)) {
1738 		wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1739 			MAC2STR(bss->bssid));
1740 		nai_realm_free(realm, count);
1741 		return 0;
1742 	}
1743 
1744 	remove_duplicate_network(wpa_s, cred, bss);
1745 
1746 	ssid = wpa_config_add_network(wpa_s->conf);
1747 	if (ssid == NULL) {
1748 		nai_realm_free(realm, count);
1749 		return -1;
1750 	}
1751 	ssid->parent_cred = cred;
1752 	wpas_notify_network_added(wpa_s, ssid);
1753 	wpa_config_set_network_defaults(ssid);
1754 	ssid->priority = cred->priority;
1755 	ssid->temporary = 1;
1756 	ssid->ssid = os_zalloc(bss->ssid_len + 1);
1757 	if (ssid->ssid == NULL)
1758 		goto fail;
1759 	os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1760 	ssid->ssid_len = bss->ssid_len;
1761 
1762 	if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1763 		goto fail;
1764 
1765 	if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1766 						     eap->method), 0) < 0)
1767 		goto fail;
1768 
1769 	switch (eap->method) {
1770 	case EAP_TYPE_TTLS:
1771 		if (eap->inner_method) {
1772 			os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1773 				    eap_get_name(EAP_VENDOR_IETF,
1774 						 eap->inner_method));
1775 			if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1776 				goto fail;
1777 			break;
1778 		}
1779 		switch (eap->inner_non_eap) {
1780 		case NAI_REALM_INNER_NON_EAP_PAP:
1781 			if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1782 			    0)
1783 				goto fail;
1784 			break;
1785 		case NAI_REALM_INNER_NON_EAP_CHAP:
1786 			if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1787 			    < 0)
1788 				goto fail;
1789 			break;
1790 		case NAI_REALM_INNER_NON_EAP_MSCHAP:
1791 			if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1792 					   0) < 0)
1793 				goto fail;
1794 			break;
1795 		case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1796 			if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1797 					   0) < 0)
1798 				goto fail;
1799 			break;
1800 		default:
1801 			/* EAP params were not set - assume TTLS/MSCHAPv2 */
1802 			if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1803 					   0) < 0)
1804 				goto fail;
1805 			break;
1806 		}
1807 		break;
1808 	case EAP_TYPE_PEAP:
1809 	case EAP_TYPE_FAST:
1810 		if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1811 				   0) < 0)
1812 			goto fail;
1813 		if (wpa_config_set(ssid, "pac_file",
1814 				   "\"blob://pac_interworking\"", 0) < 0)
1815 			goto fail;
1816 		name = eap_get_name(EAP_VENDOR_IETF,
1817 				    eap->inner_method ? eap->inner_method :
1818 				    EAP_TYPE_MSCHAPV2);
1819 		if (name == NULL)
1820 			goto fail;
1821 		os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1822 		if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1823 			goto fail;
1824 		break;
1825 	case EAP_TYPE_TLS:
1826 		break;
1827 	}
1828 
1829 	if (interworking_set_eap_params(ssid, cred,
1830 					eap->method == EAP_TYPE_TTLS) < 0)
1831 		goto fail;
1832 
1833 	nai_realm_free(realm, count);
1834 
1835 	wpa_s->next_ssid = ssid;
1836 	wpa_config_update_prio_list(wpa_s->conf);
1837 	if (!only_add)
1838 		interworking_reconnect(wpa_s);
1839 
1840 	return ssid->id;
1841 
1842 fail:
1843 	wpas_notify_network_removed(wpa_s, ssid);
1844 	wpa_config_remove_network(wpa_s->conf, ssid->id);
1845 	nai_realm_free(realm, count);
1846 	return -1;
1847 }
1848 
1849 
1850 #ifdef PCSC_FUNCS
1851 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1852 {
1853 	size_t len;
1854 
1855 	if (wpa_s->imsi[0] && wpa_s->mnc_len)
1856 		return 0;
1857 
1858 	len = sizeof(wpa_s->imsi) - 1;
1859 	if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1860 		scard_deinit(wpa_s->scard);
1861 		wpa_s->scard = NULL;
1862 		wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1863 		return -1;
1864 	}
1865 	wpa_s->imsi[len] = '\0';
1866 	wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1867 	wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1868 		   wpa_s->imsi, wpa_s->mnc_len);
1869 
1870 	return 0;
1871 }
1872 #endif /* PCSC_FUNCS */
1873 
1874 
1875 static struct wpa_cred * interworking_credentials_available_3gpp(
1876 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1877 	int *excluded)
1878 {
1879 	struct wpa_cred *selected = NULL;
1880 #ifdef INTERWORKING_3GPP
1881 	struct wpa_cred *cred;
1882 	int ret;
1883 	int is_excluded = 0;
1884 
1885 	if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) {
1886 		wpa_msg(wpa_s, MSG_DEBUG,
1887 			"interworking-avail-3gpp: not avail, anqp: %p  anqp_3gpp: %p",
1888 			bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
1889 		return NULL;
1890 	}
1891 
1892 #ifdef CONFIG_EAP_PROXY
1893 	if (!wpa_s->imsi[0]) {
1894 		size_t len;
1895 		wpa_msg(wpa_s, MSG_DEBUG,
1896 			"Interworking: IMSI not available - try to read again through eap_proxy");
1897 		wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1898 							     wpa_s->imsi,
1899 							     &len);
1900 		if (wpa_s->mnc_len > 0) {
1901 			wpa_s->imsi[len] = '\0';
1902 			wpa_msg(wpa_s, MSG_DEBUG,
1903 				"eap_proxy: IMSI %s (MNC length %d)",
1904 				wpa_s->imsi, wpa_s->mnc_len);
1905 		} else {
1906 			wpa_msg(wpa_s, MSG_DEBUG,
1907 				"eap_proxy: IMSI not available");
1908 		}
1909 	}
1910 #endif /* CONFIG_EAP_PROXY */
1911 
1912 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1913 		char *sep;
1914 		const char *imsi;
1915 		int mnc_len;
1916 		char imsi_buf[16];
1917 		size_t msin_len;
1918 
1919 #ifdef PCSC_FUNCS
1920 		if (cred->pcsc && wpa_s->scard) {
1921 			if (interworking_pcsc_read_imsi(wpa_s) < 0)
1922 				continue;
1923 			imsi = wpa_s->imsi;
1924 			mnc_len = wpa_s->mnc_len;
1925 			goto compare;
1926 		}
1927 #endif /* PCSC_FUNCS */
1928 #ifdef CONFIG_EAP_PROXY
1929 		if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1930 			imsi = wpa_s->imsi;
1931 			mnc_len = wpa_s->mnc_len;
1932 			goto compare;
1933 		}
1934 #endif /* CONFIG_EAP_PROXY */
1935 
1936 		if (cred->imsi == NULL || !cred->imsi[0] ||
1937 		    (!wpa_s->conf->external_sim &&
1938 		     (cred->milenage == NULL || !cred->milenage[0])))
1939 			continue;
1940 
1941 		sep = os_strchr(cred->imsi, '-');
1942 		if (sep == NULL ||
1943 		    (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1944 			continue;
1945 		mnc_len = sep - cred->imsi - 3;
1946 		os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1947 		sep++;
1948 		msin_len = os_strlen(cred->imsi);
1949 		if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1950 			msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1951 		os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1952 		imsi_buf[3 + mnc_len + msin_len] = '\0';
1953 		imsi = imsi_buf;
1954 
1955 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1956 	compare:
1957 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1958 		wpa_msg(wpa_s, MSG_DEBUG,
1959 			"Interworking: Parsing 3GPP info from " MACSTR,
1960 			MAC2STR(bss->bssid));
1961 		ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1962 		wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound",
1963 			ret ? "" : "not ");
1964 		if (ret) {
1965 			if (cred_no_required_oi_match(cred, bss))
1966 				continue;
1967 			if (!ignore_bw &&
1968 			    cred_below_min_backhaul(wpa_s, cred, bss))
1969 				continue;
1970 			if (!ignore_bw &&
1971 			    cred_over_max_bss_load(wpa_s, cred, bss))
1972 				continue;
1973 			if (!ignore_bw &&
1974 			    cred_conn_capab_missing(wpa_s, cred, bss))
1975 				continue;
1976 			if (cred_excluded_ssid(cred, bss)) {
1977 				if (excluded == NULL)
1978 					continue;
1979 				if (selected == NULL) {
1980 					selected = cred;
1981 					is_excluded = 1;
1982 				}
1983 			} else {
1984 				if (selected == NULL || is_excluded ||
1985 				    cred_prio_cmp(selected, cred) < 0) {
1986 					selected = cred;
1987 					is_excluded = 0;
1988 				}
1989 			}
1990 		}
1991 	}
1992 
1993 	if (excluded)
1994 		*excluded = is_excluded;
1995 #endif /* INTERWORKING_3GPP */
1996 	return selected;
1997 }
1998 
1999 
2000 static struct wpa_cred * interworking_credentials_available_realm(
2001 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2002 	int *excluded)
2003 {
2004 	struct wpa_cred *cred, *selected = NULL;
2005 	struct nai_realm *realm;
2006 	u16 count, i;
2007 	int is_excluded = 0;
2008 
2009 	if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
2010 		return NULL;
2011 
2012 	if (wpa_s->conf->cred == NULL)
2013 		return NULL;
2014 
2015 	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
2016 		MACSTR, MAC2STR(bss->bssid));
2017 	realm = nai_realm_parse(bss->anqp->nai_realm, &count);
2018 	if (realm == NULL) {
2019 		wpa_msg(wpa_s, MSG_DEBUG,
2020 			"Interworking: Could not parse NAI Realm list from "
2021 			MACSTR, MAC2STR(bss->bssid));
2022 		return NULL;
2023 	}
2024 
2025 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2026 		if (cred->realm == NULL)
2027 			continue;
2028 
2029 		for (i = 0; i < count; i++) {
2030 			if (!nai_realm_match(&realm[i], cred->realm))
2031 				continue;
2032 			if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2033 				if (cred_no_required_oi_match(cred, bss))
2034 					continue;
2035 				if (!ignore_bw &&
2036 				    cred_below_min_backhaul(wpa_s, cred, bss))
2037 					continue;
2038 				if (!ignore_bw &&
2039 				    cred_over_max_bss_load(wpa_s, cred, bss))
2040 					continue;
2041 				if (!ignore_bw &&
2042 				    cred_conn_capab_missing(wpa_s, cred, bss))
2043 					continue;
2044 				if (cred_excluded_ssid(cred, bss)) {
2045 					if (excluded == NULL)
2046 						continue;
2047 					if (selected == NULL) {
2048 						selected = cred;
2049 						is_excluded = 1;
2050 					}
2051 				} else {
2052 					if (selected == NULL || is_excluded ||
2053 					    cred_prio_cmp(selected, cred) < 0)
2054 					{
2055 						selected = cred;
2056 						is_excluded = 0;
2057 					}
2058 				}
2059 				break;
2060 			} else {
2061 				wpa_msg(wpa_s, MSG_DEBUG,
2062 					"Interworking: realm-find-eap returned false");
2063 			}
2064 		}
2065 	}
2066 
2067 	nai_realm_free(realm, count);
2068 
2069 	if (excluded)
2070 		*excluded = is_excluded;
2071 
2072 	return selected;
2073 }
2074 
2075 
2076 static struct wpa_cred * interworking_credentials_available_helper(
2077 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2078 	int *excluded)
2079 {
2080 	struct wpa_cred *cred, *cred2;
2081 	int excluded1, excluded2 = 0;
2082 
2083 	if (disallowed_bssid(wpa_s, bss->bssid) ||
2084 	    disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2085 		wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2086 			   MACSTR, MAC2STR(bss->bssid));
2087 		return NULL;
2088 	}
2089 
2090 	cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2091 							&excluded1);
2092 	cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2093 							&excluded2);
2094 	if (cred && cred2 &&
2095 	    (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2096 		cred = cred2;
2097 		excluded1 = excluded2;
2098 	}
2099 	if (!cred) {
2100 		cred = cred2;
2101 		excluded1 = excluded2;
2102 	}
2103 
2104 	cred2 = interworking_credentials_available_roaming_consortium(
2105 		wpa_s, bss, ignore_bw, &excluded2);
2106 	if (cred && cred2 &&
2107 	    (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2108 		cred = cred2;
2109 		excluded1 = excluded2;
2110 	}
2111 	if (!cred) {
2112 		cred = cred2;
2113 		excluded1 = excluded2;
2114 	}
2115 
2116 	if (excluded)
2117 		*excluded = excluded1;
2118 	return cred;
2119 }
2120 
2121 
2122 static struct wpa_cred * interworking_credentials_available(
2123 	struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
2124 {
2125 	struct wpa_cred *cred;
2126 
2127 	if (excluded)
2128 		*excluded = 0;
2129 	cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2130 							 excluded);
2131 	if (cred)
2132 		return cred;
2133 	return interworking_credentials_available_helper(wpa_s, bss, 1,
2134 							 excluded);
2135 }
2136 
2137 
2138 int domain_name_list_contains(struct wpabuf *domain_names,
2139 			      const char *domain, int exact_match)
2140 {
2141 	const u8 *pos, *end;
2142 	size_t len;
2143 
2144 	len = os_strlen(domain);
2145 	pos = wpabuf_head(domain_names);
2146 	end = pos + wpabuf_len(domain_names);
2147 
2148 	while (end - pos > 1) {
2149 		u8 elen;
2150 
2151 		elen = *pos++;
2152 		if (elen > end - pos)
2153 			break;
2154 
2155 		wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2156 				  pos, elen);
2157 		if (elen == len &&
2158 		    os_strncasecmp(domain, (const char *) pos, len) == 0)
2159 			return 1;
2160 		if (!exact_match && elen > len && pos[elen - len - 1] == '.') {
2161 			const char *ap = (const char *) pos;
2162 			int offset = elen - len;
2163 
2164 			if (os_strncasecmp(domain, ap + offset, len) == 0)
2165 				return 1;
2166 		}
2167 
2168 		pos += elen;
2169 	}
2170 
2171 	return 0;
2172 }
2173 
2174 
2175 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2176 			      struct wpa_cred *cred,
2177 			      struct wpabuf *domain_names)
2178 {
2179 	size_t i;
2180 	int ret = -1;
2181 #ifdef INTERWORKING_3GPP
2182 	char nai[100], *realm;
2183 
2184 	char *imsi = NULL;
2185 	int mnc_len = 0;
2186 	if (cred->imsi)
2187 		imsi = cred->imsi;
2188 #ifdef PCSC_FUNCS
2189 	else if (cred->pcsc && wpa_s->scard) {
2190 		if (interworking_pcsc_read_imsi(wpa_s) < 0)
2191 			return -1;
2192 		imsi = wpa_s->imsi;
2193 		mnc_len = wpa_s->mnc_len;
2194 	}
2195 #endif /* PCSC_FUNCS */
2196 #ifdef CONFIG_EAP_PROXY
2197 	else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2198 		imsi = wpa_s->imsi;
2199 		mnc_len = wpa_s->mnc_len;
2200 	}
2201 #endif /* CONFIG_EAP_PROXY */
2202 	if (domain_names &&
2203 	    imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2204 		realm = os_strchr(nai, '@');
2205 		if (realm)
2206 			realm++;
2207 		wpa_msg(wpa_s, MSG_DEBUG,
2208 			"Interworking: Search for match with SIM/USIM domain %s",
2209 			realm);
2210 		if (realm &&
2211 		    domain_name_list_contains(domain_names, realm, 1))
2212 			return 1;
2213 		if (realm)
2214 			ret = 0;
2215 	}
2216 #endif /* INTERWORKING_3GPP */
2217 
2218 	if (domain_names == NULL || cred->domain == NULL)
2219 		return ret;
2220 
2221 	for (i = 0; i < cred->num_domain; i++) {
2222 		wpa_msg(wpa_s, MSG_DEBUG,
2223 			"Interworking: Search for match with home SP FQDN %s",
2224 			cred->domain[i]);
2225 		if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2226 			return 1;
2227 	}
2228 
2229 	return 0;
2230 }
2231 
2232 
2233 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2234 				struct wpabuf *domain_names)
2235 {
2236 	struct wpa_cred *cred;
2237 
2238 	if (domain_names == NULL || wpa_s->conf->cred == NULL)
2239 		return -1;
2240 
2241 	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2242 		int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2243 		if (res)
2244 			return res;
2245 	}
2246 
2247 	return 0;
2248 }
2249 
2250 
2251 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2252 {
2253 	struct wpa_bss *bss;
2254 	struct wpa_ssid *ssid;
2255 
2256 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2257 		for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2258 			if (wpas_network_disabled(wpa_s, ssid) ||
2259 			    ssid->mode != WPAS_MODE_INFRA)
2260 				continue;
2261 			if (ssid->ssid_len != bss->ssid_len ||
2262 			    os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2263 			    0)
2264 				continue;
2265 			/*
2266 			 * TODO: Consider more accurate matching of security
2267 			 * configuration similarly to what is done in events.c
2268 			 */
2269 			return 1;
2270 		}
2271 	}
2272 
2273 	return 0;
2274 }
2275 
2276 
2277 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2278 				 struct roaming_partner *partner,
2279 				 struct wpabuf *domain_names)
2280 {
2281 	wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2282 		   partner->fqdn, partner->exact_match, partner->priority,
2283 		   partner->country);
2284 	wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2285 			  wpabuf_head(domain_names),
2286 			  wpabuf_len(domain_names));
2287 	if (!domain_name_list_contains(domain_names, partner->fqdn,
2288 				       partner->exact_match))
2289 		return 0;
2290 	/* TODO: match Country */
2291 	return 1;
2292 }
2293 
2294 
2295 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2296 		       struct wpa_bss *bss)
2297 {
2298 	size_t i;
2299 
2300 	if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
2301 		wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2302 		return 128; /* cannot check preference with domain name */
2303 	}
2304 
2305 	if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2306 	{
2307 		wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2308 		return 0; /* max preference for home SP network */
2309 	}
2310 
2311 	for (i = 0; i < cred->num_roaming_partner; i++) {
2312 		if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2313 					  bss->anqp->domain_name)) {
2314 			wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2315 				   cred->roaming_partner[i].priority);
2316 			return cred->roaming_partner[i].priority;
2317 		}
2318 	}
2319 
2320 	wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2321 	return 128;
2322 }
2323 
2324 
2325 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2326 						  struct wpa_bss *selected,
2327 						  struct wpa_cred *cred)
2328 {
2329 	struct wpa_bss *bss;
2330 	u8 best_prio, prio;
2331 	struct wpa_cred *cred2;
2332 
2333 	/*
2334 	 * Check if any other BSS is operated by a more preferred roaming
2335 	 * partner.
2336 	 */
2337 
2338 	best_prio = roaming_prio(wpa_s, cred, selected);
2339 	wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2340 		   MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2341 		   cred->id);
2342 
2343 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2344 		if (bss == selected)
2345 			continue;
2346 		cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2347 		if (!cred2)
2348 			continue;
2349 		if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2350 			continue;
2351 		prio = roaming_prio(wpa_s, cred2, bss);
2352 		wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2353 			   MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2354 			   cred2->id);
2355 		if (prio < best_prio) {
2356 			int bh1, bh2, load1, load2, conn1, conn2;
2357 			bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2358 			load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2359 			conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2360 			bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2361 			load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2362 			conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2363 			wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d  new: %d %d %d",
2364 				   bh1, load1, conn1, bh2, load2, conn2);
2365 			if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2366 				wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2367 				best_prio = prio;
2368 				selected = bss;
2369 			}
2370 		}
2371 	}
2372 
2373 	return selected;
2374 }
2375 
2376 
2377 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2378 {
2379 	struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2380 	struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2381 	unsigned int count = 0;
2382 	const char *type;
2383 	int res;
2384 	struct wpa_cred *cred, *selected_cred = NULL;
2385 	struct wpa_cred *selected_home_cred = NULL;
2386 	struct wpa_cred *selected2_cred = NULL;
2387 	struct wpa_cred *selected2_home_cred = NULL;
2388 
2389 	wpa_s->network_select = 0;
2390 
2391 	wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2392 		   wpa_s->auto_select);
2393 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2394 		int excluded = 0;
2395 		int bh, bss_load, conn_capab;
2396 		cred = interworking_credentials_available(wpa_s, bss,
2397 							  &excluded);
2398 		if (!cred)
2399 			continue;
2400 
2401 		if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2402 			/*
2403 			 * We currently support only HS 2.0 networks and those
2404 			 * are required to use WPA2-Enterprise.
2405 			 */
2406 			wpa_msg(wpa_s, MSG_DEBUG,
2407 				"Interworking: Credential match with " MACSTR
2408 				" but network does not use RSN",
2409 				MAC2STR(bss->bssid));
2410 			continue;
2411 		}
2412 		if (!excluded)
2413 			count++;
2414 		res = interworking_home_sp(wpa_s, bss->anqp ?
2415 					   bss->anqp->domain_name : NULL);
2416 		if (res > 0)
2417 			type = "home";
2418 		else if (res == 0)
2419 			type = "roaming";
2420 		else
2421 			type = "unknown";
2422 		bh = cred_below_min_backhaul(wpa_s, cred, bss);
2423 		bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2424 		conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2425 		wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2426 			excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2427 			MAC2STR(bss->bssid), type,
2428 			bh ? " below_min_backhaul=1" : "",
2429 			bss_load ? " over_max_bss_load=1" : "",
2430 			conn_capab ? " conn_capab_missing=1" : "",
2431 			cred->id, cred->priority, cred->sp_priority);
2432 		if (excluded)
2433 			continue;
2434 		if (wpa_s->auto_select ||
2435 		    (wpa_s->conf->auto_interworking &&
2436 		     wpa_s->auto_network_select)) {
2437 			if (bh || bss_load || conn_capab) {
2438 				if (selected2_cred == NULL ||
2439 				    cred_prio_cmp(cred, selected2_cred) > 0) {
2440 					wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2441 					selected2 = bss;
2442 					selected2_cred = cred;
2443 				}
2444 				if (res > 0 &&
2445 				    (selected2_home_cred == NULL ||
2446 				     cred_prio_cmp(cred, selected2_home_cred) >
2447 				     0)) {
2448 					wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2449 					selected2_home = bss;
2450 					selected2_home_cred = cred;
2451 				}
2452 			} else {
2453 				if (selected_cred == NULL ||
2454 				    cred_prio_cmp(cred, selected_cred) > 0) {
2455 					wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2456 					selected = bss;
2457 					selected_cred = cred;
2458 				}
2459 				if (res > 0 &&
2460 				    (selected_home_cred == NULL ||
2461 				     cred_prio_cmp(cred, selected_home_cred) >
2462 				     0)) {
2463 					wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2464 					selected_home = bss;
2465 					selected_home_cred = cred;
2466 				}
2467 			}
2468 		}
2469 	}
2470 
2471 	if (selected_home && selected_home != selected &&
2472 	    selected_home_cred &&
2473 	    (selected_cred == NULL ||
2474 	     cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2475 		/* Prefer network operated by the Home SP */
2476 		wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2477 		selected = selected_home;
2478 		selected_cred = selected_home_cred;
2479 	}
2480 
2481 	if (!selected) {
2482 		if (selected2_home) {
2483 			wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2484 			selected = selected2_home;
2485 			selected_cred = selected2_home_cred;
2486 		} else if (selected2) {
2487 			wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2488 			selected = selected2;
2489 			selected_cred = selected2_cred;
2490 		}
2491 	}
2492 
2493 	if (count == 0) {
2494 		/*
2495 		 * No matching network was found based on configured
2496 		 * credentials. Check whether any of the enabled network blocks
2497 		 * have matching APs.
2498 		 */
2499 		if (interworking_find_network_match(wpa_s)) {
2500 			wpa_msg(wpa_s, MSG_DEBUG,
2501 				"Interworking: Possible BSS match for enabled network configurations");
2502 			if (wpa_s->auto_select) {
2503 				interworking_reconnect(wpa_s);
2504 				return;
2505 			}
2506 		}
2507 
2508 		if (wpa_s->auto_network_select) {
2509 			wpa_msg(wpa_s, MSG_DEBUG,
2510 				"Interworking: Continue scanning after ANQP fetch");
2511 			wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2512 						0);
2513 			return;
2514 		}
2515 
2516 		wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2517 			"with matching credentials found");
2518 		if (wpa_s->wpa_state == WPA_SCANNING)
2519 			wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2520 	}
2521 
2522 	if (selected) {
2523 		wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2524 			   MAC2STR(selected->bssid));
2525 		selected = pick_best_roaming_partner(wpa_s, selected,
2526 						     selected_cred);
2527 		wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2528 			   " (after best roaming partner selection)",
2529 			   MAC2STR(selected->bssid));
2530 		wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2531 			MAC2STR(selected->bssid));
2532 		interworking_connect(wpa_s, selected, 0);
2533 	}
2534 }
2535 
2536 
2537 static struct wpa_bss_anqp *
2538 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2539 {
2540 	struct wpa_bss *other;
2541 
2542 	if (is_zero_ether_addr(bss->hessid))
2543 		return NULL; /* Cannot be in the same homegenous ESS */
2544 
2545 	dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2546 		if (other == bss)
2547 			continue;
2548 		if (other->anqp == NULL)
2549 			continue;
2550 		if (other->anqp->roaming_consortium == NULL &&
2551 		    other->anqp->nai_realm == NULL &&
2552 		    other->anqp->anqp_3gpp == NULL &&
2553 		    other->anqp->domain_name == NULL)
2554 			continue;
2555 		if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2556 			continue;
2557 		if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2558 			continue;
2559 		if (bss->ssid_len != other->ssid_len ||
2560 		    os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2561 			continue;
2562 
2563 		wpa_msg(wpa_s, MSG_DEBUG,
2564 			"Interworking: Share ANQP data with already fetched BSSID "
2565 			MACSTR " and " MACSTR,
2566 			MAC2STR(other->bssid), MAC2STR(bss->bssid));
2567 		other->anqp->users++;
2568 		return other->anqp;
2569 	}
2570 
2571 	return NULL;
2572 }
2573 
2574 
2575 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2576 {
2577 	struct wpa_bss *bss;
2578 	int found = 0;
2579 	const u8 *ie;
2580 
2581 	wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2582 		   "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2583 		   wpa_s->fetch_anqp_in_progress,
2584 		   wpa_s->fetch_osu_icon_in_progress);
2585 
2586 	if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2587 		wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2588 		return;
2589 	}
2590 
2591 #ifdef CONFIG_HS20
2592 	if (wpa_s->fetch_osu_icon_in_progress) {
2593 		wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2594 		hs20_next_osu_icon(wpa_s);
2595 		return;
2596 	}
2597 #endif /* CONFIG_HS20 */
2598 
2599 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2600 		if (!(bss->caps & IEEE80211_CAP_ESS))
2601 			continue;
2602 		ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
2603 		if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
2604 			continue; /* AP does not support Interworking */
2605 		if (disallowed_bssid(wpa_s, bss->bssid) ||
2606 		    disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2607 			continue; /* Disallowed BSS */
2608 
2609 		if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2610 			if (bss->anqp == NULL) {
2611 				bss->anqp = interworking_match_anqp_info(wpa_s,
2612 									 bss);
2613 				if (bss->anqp) {
2614 					/* Shared data already fetched */
2615 					continue;
2616 				}
2617 				bss->anqp = wpa_bss_anqp_alloc();
2618 				if (bss->anqp == NULL)
2619 					break;
2620 			}
2621 			found++;
2622 			bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2623 			wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2624 				MACSTR, MAC2STR(bss->bssid));
2625 			interworking_anqp_send_req(wpa_s, bss);
2626 			break;
2627 		}
2628 	}
2629 
2630 	if (found == 0) {
2631 #ifdef CONFIG_HS20
2632 		if (wpa_s->fetch_osu_info) {
2633 			if (wpa_s->num_prov_found == 0 &&
2634 			    wpa_s->fetch_osu_waiting_scan &&
2635 			    wpa_s->num_osu_scans < 3) {
2636 				wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2637 				hs20_start_osu_scan(wpa_s);
2638 				return;
2639 			}
2640 			wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2641 			hs20_osu_icon_fetch(wpa_s);
2642 			return;
2643 		}
2644 #endif /* CONFIG_HS20 */
2645 		wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2646 		wpa_s->fetch_anqp_in_progress = 0;
2647 		if (wpa_s->network_select)
2648 			interworking_select_network(wpa_s);
2649 	}
2650 }
2651 
2652 
2653 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2654 {
2655 	struct wpa_bss *bss;
2656 
2657 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2658 		bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2659 
2660 	wpa_s->fetch_anqp_in_progress = 1;
2661 
2662 	/*
2663 	 * Start actual ANQP operation from eloop call to make sure the loop
2664 	 * does not end up using excessive recursion.
2665 	 */
2666 	eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2667 }
2668 
2669 
2670 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2671 {
2672 	if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2673 		return 0;
2674 
2675 	wpa_s->network_select = 0;
2676 	wpa_s->fetch_all_anqp = 1;
2677 	wpa_s->fetch_osu_info = 0;
2678 
2679 	interworking_start_fetch_anqp(wpa_s);
2680 
2681 	return 0;
2682 }
2683 
2684 
2685 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2686 {
2687 	if (!wpa_s->fetch_anqp_in_progress)
2688 		return;
2689 
2690 	wpa_s->fetch_anqp_in_progress = 0;
2691 }
2692 
2693 
2694 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
2695 		  u16 info_ids[], size_t num_ids, u32 subtypes,
2696 		  int get_cell_pref)
2697 {
2698 	struct wpabuf *buf;
2699 	struct wpabuf *extra_buf = NULL;
2700 	int ret = 0;
2701 	int freq;
2702 	struct wpa_bss *bss;
2703 	int res;
2704 
2705 	bss = wpa_bss_get_bssid(wpa_s, dst);
2706 	if (!bss) {
2707 		wpa_printf(MSG_WARNING,
2708 			   "ANQP: Cannot send query to unknown BSS "
2709 			   MACSTR, MAC2STR(dst));
2710 		return -1;
2711 	}
2712 
2713 	wpa_bss_anqp_unshare_alloc(bss);
2714 	freq = bss->freq;
2715 
2716 	wpa_msg(wpa_s, MSG_DEBUG,
2717 		"ANQP: Query Request to " MACSTR " for %u id(s)",
2718 		MAC2STR(dst), (unsigned int) num_ids);
2719 
2720 #ifdef CONFIG_HS20
2721 	if (subtypes != 0) {
2722 		extra_buf = wpabuf_alloc(100);
2723 		if (extra_buf == NULL)
2724 			return -1;
2725 		hs20_put_anqp_req(subtypes, NULL, 0, extra_buf);
2726 	}
2727 #endif /* CONFIG_HS20 */
2728 
2729 #ifdef CONFIG_MBO
2730 	if (get_cell_pref) {
2731 		struct wpabuf *mbo;
2732 
2733 		mbo = mbo_build_anqp_buf(wpa_s, bss);
2734 		if (mbo) {
2735 			if (wpabuf_resize(&extra_buf, wpabuf_len(mbo))) {
2736 				wpabuf_free(extra_buf);
2737 				return -1;
2738 			}
2739 			wpabuf_put_buf(extra_buf, mbo);
2740 			wpabuf_free(mbo);
2741 		}
2742 	}
2743 #endif /* CONFIG_MBO */
2744 
2745 	buf = anqp_build_req(info_ids, num_ids, extra_buf);
2746 	wpabuf_free(extra_buf);
2747 	if (buf == NULL)
2748 		return -1;
2749 
2750 	res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
2751 	if (res < 0) {
2752 		wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
2753 		wpabuf_free(buf);
2754 		ret = -1;
2755 	} else {
2756 		wpa_msg(wpa_s, MSG_DEBUG,
2757 			"ANQP: Query started with dialog token %u", res);
2758 	}
2759 
2760 	return ret;
2761 }
2762 
2763 
2764 static void anqp_add_extra(struct wpa_supplicant *wpa_s,
2765 			   struct wpa_bss_anqp *anqp, u16 info_id,
2766 			   const u8 *data, size_t slen)
2767 {
2768 	struct wpa_bss_anqp_elem *tmp, *elem = NULL;
2769 
2770 	if (!anqp)
2771 		return;
2772 
2773 	dl_list_for_each(tmp, &anqp->anqp_elems, struct wpa_bss_anqp_elem,
2774 			 list) {
2775 		if (tmp->infoid == info_id) {
2776 			elem = tmp;
2777 			break;
2778 		}
2779 	}
2780 
2781 	if (!elem) {
2782 		elem = os_zalloc(sizeof(*elem));
2783 		if (!elem)
2784 			return;
2785 		elem->infoid = info_id;
2786 		dl_list_add(&anqp->anqp_elems, &elem->list);
2787 	} else {
2788 		wpabuf_free(elem->payload);
2789 	}
2790 
2791 	elem->payload = wpabuf_alloc_copy(data, slen);
2792 	if (!elem->payload) {
2793 		dl_list_del(&elem->list);
2794 		os_free(elem);
2795 	}
2796 }
2797 
2798 
2799 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2800 					    struct wpa_bss *bss, const u8 *sa,
2801 					    u16 info_id,
2802 					    const u8 *data, size_t slen,
2803 					    u8 dialog_token)
2804 {
2805 	const u8 *pos = data;
2806 	struct wpa_bss_anqp *anqp = NULL;
2807 #ifdef CONFIG_HS20
2808 	u8 type;
2809 #endif /* CONFIG_HS20 */
2810 
2811 	if (bss)
2812 		anqp = bss->anqp;
2813 
2814 	switch (info_id) {
2815 	case ANQP_CAPABILITY_LIST:
2816 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2817 			" ANQP Capability list", MAC2STR(sa));
2818 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list",
2819 				  pos, slen);
2820 		if (anqp) {
2821 			wpabuf_free(anqp->capability_list);
2822 			anqp->capability_list = wpabuf_alloc_copy(pos, slen);
2823 		}
2824 		break;
2825 	case ANQP_VENUE_NAME:
2826 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2827 			" Venue Name", MAC2STR(sa));
2828 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2829 		if (anqp) {
2830 			wpabuf_free(anqp->venue_name);
2831 			anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2832 		}
2833 		break;
2834 	case ANQP_NETWORK_AUTH_TYPE:
2835 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2836 			" Network Authentication Type information",
2837 			MAC2STR(sa));
2838 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2839 				  "Type", pos, slen);
2840 		if (anqp) {
2841 			wpabuf_free(anqp->network_auth_type);
2842 			anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2843 		}
2844 		break;
2845 	case ANQP_ROAMING_CONSORTIUM:
2846 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2847 			" Roaming Consortium list", MAC2STR(sa));
2848 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2849 				  pos, slen);
2850 		if (anqp) {
2851 			wpabuf_free(anqp->roaming_consortium);
2852 			anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2853 		}
2854 		break;
2855 	case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2856 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2857 			" IP Address Type Availability information",
2858 			MAC2STR(sa));
2859 		wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2860 			    pos, slen);
2861 		if (anqp) {
2862 			wpabuf_free(anqp->ip_addr_type_availability);
2863 			anqp->ip_addr_type_availability =
2864 				wpabuf_alloc_copy(pos, slen);
2865 		}
2866 		break;
2867 	case ANQP_NAI_REALM:
2868 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2869 			" NAI Realm list", MAC2STR(sa));
2870 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2871 		if (anqp) {
2872 			wpabuf_free(anqp->nai_realm);
2873 			anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2874 		}
2875 		break;
2876 	case ANQP_3GPP_CELLULAR_NETWORK:
2877 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2878 			" 3GPP Cellular Network information", MAC2STR(sa));
2879 		wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2880 				  pos, slen);
2881 		if (anqp) {
2882 			wpabuf_free(anqp->anqp_3gpp);
2883 			anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2884 		}
2885 		break;
2886 	case ANQP_DOMAIN_NAME:
2887 		wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2888 			" Domain Name list", MAC2STR(sa));
2889 		wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2890 		if (anqp) {
2891 			wpabuf_free(anqp->domain_name);
2892 			anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2893 		}
2894 		break;
2895 	case ANQP_VENDOR_SPECIFIC:
2896 		if (slen < 3)
2897 			return;
2898 
2899 		switch (WPA_GET_BE24(pos)) {
2900 #ifdef CONFIG_HS20
2901 		case OUI_WFA:
2902 			pos += 3;
2903 			slen -= 3;
2904 
2905 			if (slen < 1)
2906 				return;
2907 			type = *pos++;
2908 			slen--;
2909 
2910 			switch (type) {
2911 			case HS20_ANQP_OUI_TYPE:
2912 				hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
2913 							     pos, slen,
2914 							     dialog_token);
2915 				break;
2916 			default:
2917 				wpa_msg(wpa_s, MSG_DEBUG,
2918 					"HS20: Unsupported ANQP vendor type %u",
2919 					type);
2920 				break;
2921 			}
2922 			break;
2923 #endif /* CONFIG_HS20 */
2924 		default:
2925 			wpa_msg(wpa_s, MSG_DEBUG,
2926 				"Interworking: Unsupported vendor-specific ANQP OUI %06x",
2927 				WPA_GET_BE24(pos));
2928 			return;
2929 		}
2930 		break;
2931 	default:
2932 		wpa_msg(wpa_s, MSG_DEBUG,
2933 			"Interworking: Unsupported ANQP Info ID %u", info_id);
2934 		anqp_add_extra(wpa_s, anqp, info_id, data, slen);
2935 		break;
2936 	}
2937 }
2938 
2939 
2940 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2941 		  enum gas_query_result result,
2942 		  const struct wpabuf *adv_proto,
2943 		  const struct wpabuf *resp, u16 status_code)
2944 {
2945 	struct wpa_supplicant *wpa_s = ctx;
2946 	const u8 *pos;
2947 	const u8 *end;
2948 	u16 info_id;
2949 	u16 slen;
2950 	struct wpa_bss *bss = NULL, *tmp;
2951 	const char *anqp_result = "SUCCESS";
2952 
2953 	wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
2954 		   " dialog_token=%u result=%d status_code=%u",
2955 		   MAC2STR(dst), dialog_token, result, status_code);
2956 	if (result != GAS_QUERY_SUCCESS) {
2957 #ifdef CONFIG_HS20
2958 		if (wpa_s->fetch_osu_icon_in_progress)
2959 			hs20_icon_fetch_failed(wpa_s);
2960 #endif /* CONFIG_HS20 */
2961 		anqp_result = "FAILURE";
2962 		goto out;
2963 	}
2964 
2965 	pos = wpabuf_head(adv_proto);
2966 	if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2967 	    pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2968 		wpa_msg(wpa_s, MSG_DEBUG,
2969 			"ANQP: Unexpected Advertisement Protocol in response");
2970 #ifdef CONFIG_HS20
2971 		if (wpa_s->fetch_osu_icon_in_progress)
2972 			hs20_icon_fetch_failed(wpa_s);
2973 #endif /* CONFIG_HS20 */
2974 		anqp_result = "INVALID_FRAME";
2975 		goto out;
2976 	}
2977 
2978 	/*
2979 	 * If possible, select the BSS entry based on which BSS entry was used
2980 	 * for the request. This can help in cases where multiple BSS entries
2981 	 * may exist for the same AP.
2982 	 */
2983 	dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2984 		if (tmp == wpa_s->interworking_gas_bss &&
2985 		    os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2986 			bss = tmp;
2987 			break;
2988 		}
2989 	}
2990 	if (bss == NULL)
2991 		bss = wpa_bss_get_bssid(wpa_s, dst);
2992 
2993 	pos = wpabuf_head(resp);
2994 	end = pos + wpabuf_len(resp);
2995 
2996 	while (pos < end) {
2997 		unsigned int left = end - pos;
2998 
2999 		if (left < 4) {
3000 			wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element");
3001 			anqp_result = "INVALID_FRAME";
3002 			goto out_parse_done;
3003 		}
3004 		info_id = WPA_GET_LE16(pos);
3005 		pos += 2;
3006 		slen = WPA_GET_LE16(pos);
3007 		pos += 2;
3008 		left -= 4;
3009 		if (left < slen) {
3010 			wpa_msg(wpa_s, MSG_DEBUG,
3011 				"ANQP: Invalid element length for Info ID %u",
3012 				info_id);
3013 			anqp_result = "INVALID_FRAME";
3014 			goto out_parse_done;
3015 		}
3016 		interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
3017 						slen, dialog_token);
3018 		pos += slen;
3019 	}
3020 
3021 out_parse_done:
3022 #ifdef CONFIG_HS20
3023 	hs20_notify_parse_done(wpa_s);
3024 #endif /* CONFIG_HS20 */
3025 out:
3026 	wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
3027 		MAC2STR(dst), anqp_result);
3028 }
3029 
3030 
3031 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
3032 					  struct wpa_scan_results *scan_res)
3033 {
3034 	wpa_msg(wpa_s, MSG_DEBUG,
3035 		"Interworking: Scan results available - start ANQP fetch");
3036 	interworking_start_fetch_anqp(wpa_s);
3037 }
3038 
3039 
3040 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
3041 			int *freqs)
3042 {
3043 	interworking_stop_fetch_anqp(wpa_s);
3044 	wpa_s->network_select = 1;
3045 	wpa_s->auto_network_select = 0;
3046 	wpa_s->auto_select = !!auto_select;
3047 	wpa_s->fetch_all_anqp = 0;
3048 	wpa_s->fetch_osu_info = 0;
3049 	wpa_msg(wpa_s, MSG_DEBUG,
3050 		"Interworking: Start scan for network selection");
3051 	wpa_s->scan_res_handler = interworking_scan_res_handler;
3052 	wpa_s->normal_scans = 0;
3053 	wpa_s->scan_req = MANUAL_SCAN_REQ;
3054 	os_free(wpa_s->manual_scan_freqs);
3055 	wpa_s->manual_scan_freqs = freqs;
3056 	wpa_s->after_wps = 0;
3057 	wpa_s->known_wps_freq = 0;
3058 	wpa_supplicant_req_scan(wpa_s, 0, 0);
3059 
3060 	return 0;
3061 }
3062 
3063 
3064 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
3065 			enum gas_query_result result,
3066 			const struct wpabuf *adv_proto,
3067 			const struct wpabuf *resp, u16 status_code)
3068 {
3069 	struct wpa_supplicant *wpa_s = ctx;
3070 	struct wpabuf *n;
3071 
3072 	wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
3073 		" dialog_token=%d status_code=%d resp_len=%d",
3074 		MAC2STR(addr), dialog_token, status_code,
3075 		resp ? (int) wpabuf_len(resp) : -1);
3076 	if (!resp)
3077 		return;
3078 
3079 	n = wpabuf_dup(resp);
3080 	if (n == NULL)
3081 		return;
3082 	wpabuf_free(wpa_s->prev_gas_resp);
3083 	wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
3084 	os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
3085 	wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
3086 	wpa_s->last_gas_resp = n;
3087 	os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
3088 	wpa_s->last_gas_dialog_token = dialog_token;
3089 }
3090 
3091 
3092 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
3093 		     const struct wpabuf *adv_proto,
3094 		     const struct wpabuf *query)
3095 {
3096 	struct wpabuf *buf;
3097 	int ret = 0;
3098 	int freq;
3099 	struct wpa_bss *bss;
3100 	int res;
3101 	size_t len;
3102 	u8 query_resp_len_limit = 0;
3103 
3104 	freq = wpa_s->assoc_freq;
3105 	bss = wpa_bss_get_bssid(wpa_s, dst);
3106 	if (bss)
3107 		freq = bss->freq;
3108 	if (freq <= 0)
3109 		return -1;
3110 
3111 	wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
3112 		MAC2STR(dst), freq);
3113 	wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
3114 	wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
3115 
3116 	len = 3 + wpabuf_len(adv_proto) + 2;
3117 	if (query)
3118 		len += wpabuf_len(query);
3119 	buf = gas_build_initial_req(0, len);
3120 	if (buf == NULL)
3121 		return -1;
3122 
3123 	/* Advertisement Protocol IE */
3124 	wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3125 	wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3126 	wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3127 	wpabuf_put_buf(buf, adv_proto);
3128 
3129 	/* GAS Query */
3130 	if (query) {
3131 		wpabuf_put_le16(buf, wpabuf_len(query));
3132 		wpabuf_put_buf(buf, query);
3133 	} else
3134 		wpabuf_put_le16(buf, 0);
3135 
3136 	res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
3137 	if (res < 0) {
3138 		wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
3139 		wpabuf_free(buf);
3140 		ret = -1;
3141 	} else
3142 		wpa_msg(wpa_s, MSG_DEBUG,
3143 			"GAS: Query started with dialog token %u", res);
3144 
3145 	return ret;
3146 }
3147