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source: rtems-libbsd/freebsd/contrib/wpa/wpa_supplicant/interworking.c @ 9c9d11b

55-freebsd-126-freebsd-12

Last change on this file since 9c9d11b was 9c9d11b, checked in by Sichen Zhao <1473996754@…>, on 08/01/17 at 12:43:41
Import wpa from FreeBSD
Property mode set to `100644`
File size: 77.2 KB

Line
1	#include <machine/rtems-bsd-user-space.h>
2
3	/*
4	* Interworking (IEEE 802.11u)
5	* Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
6	* Copyright (c) 2011-2014, Jouni Malinen <j@w1.fi>
7	*
8	* This software may be distributed under the terms of the BSD license.
9	* See README for more details.
10	*/
11
12	#include "includes.h"
13
14	#include "common.h"
15	#include "common/ieee802_11_defs.h"
16	#include "common/gas.h"
17	#include "common/wpa_ctrl.h"
18	#include "utils/pcsc_funcs.h"
19	#include "utils/eloop.h"
20	#include "drivers/driver.h"
21	#include "eap_common/eap_defs.h"
22	#include "eap_peer/eap.h"
23	#include "eap_peer/eap_methods.h"
24	#include "eapol_supp/eapol_supp_sm.h"
25	#include "rsn_supp/wpa.h"
26	#include "wpa_supplicant_i.h"
27	#include "config.h"
28	#include "config_ssid.h"
29	#include "bss.h"
30	#include "scan.h"
31	#include "notify.h"
32	#include "driver_i.h"
33	#include "gas_query.h"
34	#include "hs20_supplicant.h"
35	#include "interworking.h"
36
37
38	#if defined(EAP_SIM) \| defined(EAP_SIM_DYNAMIC)
39	#define INTERWORKING_3GPP
40	#else
41	#if defined(EAP_AKA) \| defined(EAP_AKA_DYNAMIC)
42	#define INTERWORKING_3GPP
43	#else
44	#if defined(EAP_AKA_PRIME) \| defined(EAP_AKA_PRIME_DYNAMIC)
45	#define INTERWORKING_3GPP
46	#endif
47	#endif
48	#endif
49
50	static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
51	static struct wpa_cred * interworking_credentials_available_realm(
52	struct wpa_supplicant wpa_s, struct wpa_bss bss, int ignore_bw,
53	int *excluded);
54	static struct wpa_cred * interworking_credentials_available_3gpp(
55	struct wpa_supplicant wpa_s, struct wpa_bss bss, int ignore_bw,
56	int *excluded);
57
58
59	static int cred_prio_cmp(const struct wpa_cred a, const struct wpa_cred b)
60	{
61	if (a->priority > b->priority)
62	return 1;
63	if (a->priority < b->priority)
64	return -1;
65	if (a->provisioning_sp == NULL \|\| b->provisioning_sp == NULL \|\|
66	os_strcmp(a->provisioning_sp, b->provisioning_sp) != 0)
67	return 0;
68	if (a->sp_priority < b->sp_priority)
69	return 1;
70	if (a->sp_priority > b->sp_priority)
71	return -1;
72	return 0;
73	}
74
75
76	static void interworking_reconnect(struct wpa_supplicant *wpa_s)
77	{
78	unsigned int tried;
79
80	if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
81	wpa_supplicant_cancel_sched_scan(wpa_s);
82	wpa_s->own_disconnect_req = 1;
83	wpa_supplicant_deauthenticate(wpa_s,
84	WLAN_REASON_DEAUTH_LEAVING);
85	}
86	wpa_s->disconnected = 0;
87	wpa_s->reassociate = 1;
88	tried = wpa_s->interworking_fast_assoc_tried;
89	wpa_s->interworking_fast_assoc_tried = 1;
90
91	if (!tried && wpa_supplicant_fast_associate(wpa_s) >= 0)
92	return;
93
94	wpa_s->interworking_fast_assoc_tried = 0;
95	wpa_supplicant_req_scan(wpa_s, 0, 0);
96	}
97
98
99	static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
100	struct wpabuf *extra)
101	{
102	struct wpabuf *buf;
103	size_t i;
104	u8 *len_pos;
105
106	buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
107	(extra ? wpabuf_len(extra) : 0));
108	if (buf == NULL)
109	return NULL;
110
111	len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
112	for (i = 0; i < num_ids; i++)
113	wpabuf_put_le16(buf, info_ids[i]);
114	gas_anqp_set_element_len(buf, len_pos);
115	if (extra)
116	wpabuf_put_buf(buf, extra);
117
118	gas_anqp_set_len(buf);
119
120	return buf;
121	}
122
123
124	static void interworking_anqp_resp_cb(void ctx, const u8 dst,
125	u8 dialog_token,
126	enum gas_query_result result,
127	const struct wpabuf *adv_proto,
128	const struct wpabuf *resp,
129	u16 status_code)
130	{
131	struct wpa_supplicant *wpa_s = ctx;
132
133	wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR
134	" dialog_token=%u result=%d status_code=%u",
135	MAC2STR(dst), dialog_token, result, status_code);
136	anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
137	status_code);
138	interworking_next_anqp_fetch(wpa_s);
139	}
140
141
142	static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
143	{
144	struct wpa_cred *cred;
145
146	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
147	if (cred->roaming_consortium_len)
148	return 1;
149	if (cred->required_roaming_consortium_len)
150	return 1;
151	}
152	return 0;
153	}
154
155
156	static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
157	{
158	struct wpa_cred *cred;
159
160	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
161	if (cred->pcsc \|\| cred->imsi)
162	return 1;
163	}
164	return 0;
165	}
166
167
168	static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
169	{
170	struct wpa_cred *cred;
171
172	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
173	if (cred->pcsc \|\| cred->imsi)
174	continue;
175	if (!cred->eap_method)
176	return 1;
177	if (cred->realm && cred->roaming_consortium_len == 0)
178	return 1;
179	}
180	return 0;
181	}
182
183
184	static int cred_with_domain(struct wpa_supplicant *wpa_s)
185	{
186	struct wpa_cred *cred;
187
188	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
189	if (cred->domain \|\| cred->pcsc \|\| cred->imsi \|\|
190	cred->roaming_partner)
191	return 1;
192	}
193	return 0;
194	}
195
196
197	#ifdef CONFIG_HS20
198
199	static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s)
200	{
201	struct wpa_cred *cred;
202
203	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
204	if (cred->min_dl_bandwidth_home \|\|
205	cred->min_ul_bandwidth_home \|\|
206	cred->min_dl_bandwidth_roaming \|\|
207	cred->min_ul_bandwidth_roaming)
208	return 1;
209	}
210	return 0;
211	}
212
213
214	static int cred_with_conn_capab(struct wpa_supplicant *wpa_s)
215	{
216	struct wpa_cred *cred;
217
218	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
219	if (cred->num_req_conn_capab)
220	return 1;
221	}
222	return 0;
223	}
224
225	#endif /* CONFIG_HS20 */
226
227
228	static int additional_roaming_consortiums(struct wpa_bss *bss)
229	{
230	const u8 *ie;
231	ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
232	if (ie == NULL \|\| ie[1] == 0)
233	return 0;
234	return ie[2]; /* Number of ANQP OIs */
235	}
236
237
238	static void interworking_continue_anqp(void eloop_ctx, void sock_ctx)
239	{
240	struct wpa_supplicant *wpa_s = eloop_ctx;
241	interworking_next_anqp_fetch(wpa_s);
242	}
243
244
245	static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
246	struct wpa_bss *bss)
247	{
248	struct wpabuf *buf;
249	int ret = 0;
250	int res;
251	u16 info_ids[8];
252	size_t num_info_ids = 0;
253	struct wpabuf *extra = NULL;
254	int all = wpa_s->fetch_all_anqp;
255
256	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
257	MAC2STR(bss->bssid));
258	wpa_s->interworking_gas_bss = bss;
259
260	info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
261	if (all) {
262	info_ids[num_info_ids++] = ANQP_VENUE_NAME;
263	info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
264	}
265	if (all \|\| (cred_with_roaming_consortium(wpa_s) &&
266	additional_roaming_consortiums(bss)))
267	info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
268	if (all)
269	info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
270	if (all \|\| cred_with_nai_realm(wpa_s))
271	info_ids[num_info_ids++] = ANQP_NAI_REALM;
272	if (all \|\| cred_with_3gpp(wpa_s)) {
273	info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
274	wpa_supplicant_scard_init(wpa_s, NULL);
275	}
276	if (all \|\| cred_with_domain(wpa_s))
277	info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
278	wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
279	(u8 ) info_ids, num_info_ids 2);
280
281	#ifdef CONFIG_HS20
282	if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
283	u8 *len_pos;
284
285	extra = wpabuf_alloc(100);
286	if (!extra)
287	return -1;
288
289	len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
290	wpabuf_put_be24(extra, OUI_WFA);
291	wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
292	wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
293	wpabuf_put_u8(extra, 0); /* Reserved */
294	wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
295	if (all)
296	wpabuf_put_u8(extra,
297	HS20_STYPE_OPERATOR_FRIENDLY_NAME);
298	if (all \|\| cred_with_min_backhaul(wpa_s))
299	wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
300	if (all \|\| cred_with_conn_capab(wpa_s))
301	wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
302	if (all)
303	wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
304	if (all)
305	wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST);
306	gas_anqp_set_element_len(extra, len_pos);
307	}
308	#endif /* CONFIG_HS20 */
309
310	buf = anqp_build_req(info_ids, num_info_ids, extra);
311	wpabuf_free(extra);
312	if (buf == NULL)
313	return -1;
314
315	res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
316	interworking_anqp_resp_cb, wpa_s);
317	if (res < 0) {
318	wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
319	wpabuf_free(buf);
320	ret = -1;
321	eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
322	NULL);
323	} else
324	wpa_msg(wpa_s, MSG_DEBUG,
325	"ANQP: Query started with dialog token %u", res);
326
327	return ret;
328	}
329
330
331	struct nai_realm_eap {
332	u8 method;
333	u8 inner_method;
334	enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
335	u8 cred_type;
336	u8 tunneled_cred_type;
337	};
338
339	struct nai_realm {
340	u8 encoding;
341	char *realm;
342	u8 eap_count;
343	struct nai_realm_eap *eap;
344	};
345
346
347	static void nai_realm_free(struct nai_realm *realms, u16 count)
348	{
349	u16 i;
350
351	if (realms == NULL)
352	return;
353	for (i = 0; i < count; i++) {
354	os_free(realms[i].eap);
355	os_free(realms[i].realm);
356	}
357	os_free(realms);
358	}
359
360
361	static const u8 * nai_realm_parse_eap(struct nai_realm_eap e, const u8 pos,
362	const u8 *end)
363	{
364	u8 elen, auth_count, a;
365	const u8 *e_end;
366
367	if (pos + 3 > end) {
368	wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
369	return NULL;
370	}
371
372	elen = *pos++;
373	if (pos + elen > end \|\| elen < 2) {
374	wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
375	return NULL;
376	}
377	e_end = pos + elen;
378	e->method = *pos++;
379	auth_count = *pos++;
380	wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
381	elen, e->method, auth_count);
382
383	for (a = 0; a < auth_count; a++) {
384	u8 id, len;
385
386	if (pos + 2 > end \|\| pos + 2 + pos[1] > end) {
387	wpa_printf(MSG_DEBUG, "No room for Authentication "
388	"Parameter subfield");
389	return NULL;
390	}
391
392	id = *pos++;
393	len = *pos++;
394
395	switch (id) {
396	case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
397	if (len < 1)
398	break;
399	e->inner_non_eap = *pos;
400	if (e->method != EAP_TYPE_TTLS)
401	break;
402	switch (*pos) {
403	case NAI_REALM_INNER_NON_EAP_PAP:
404	wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
405	break;
406	case NAI_REALM_INNER_NON_EAP_CHAP:
407	wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
408	break;
409	case NAI_REALM_INNER_NON_EAP_MSCHAP:
410	wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
411	break;
412	case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
413	wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
414	break;
415	}
416	break;
417	case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
418	if (len < 1)
419	break;
420	e->inner_method = *pos;
421	wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
422	e->inner_method);
423	break;
424	case NAI_REALM_EAP_AUTH_CRED_TYPE:
425	if (len < 1)
426	break;
427	e->cred_type = *pos;
428	wpa_printf(MSG_DEBUG, "Credential Type: %u",
429	e->cred_type);
430	break;
431	case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
432	if (len < 1)
433	break;
434	e->tunneled_cred_type = *pos;
435	wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
436	"Type: %u", e->tunneled_cred_type);
437	break;
438	default:
439	wpa_printf(MSG_DEBUG, "Unsupported Authentication "
440	"Parameter: id=%u len=%u", id, len);
441	wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
442	"Value", pos, len);
443	break;
444	}
445
446	pos += len;
447	}
448
449	return e_end;
450	}
451
452
453	static const u8 * nai_realm_parse_realm(struct nai_realm r, const u8 pos,
454	const u8 *end)
455	{
456	u16 len;
457	const u8 *f_end;
458	u8 realm_len, e;
459
460	if (end - pos < 4) {
461	wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
462	"fixed fields");
463	return NULL;
464	}
465
466	len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
467	pos += 2;
468	if (pos + len > end \|\| len < 3) {
469	wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
470	"(len=%u; left=%u)",
471	len, (unsigned int) (end - pos));
472	return NULL;
473	}
474	f_end = pos + len;
475
476	r->encoding = *pos++;
477	realm_len = *pos++;
478	if (pos + realm_len > f_end) {
479	wpa_printf(MSG_DEBUG, "No room for NAI Realm "
480	"(len=%u; left=%u)",
481	realm_len, (unsigned int) (f_end - pos));
482	return NULL;
483	}
484	wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
485	r->realm = dup_binstr(pos, realm_len);
486	if (r->realm == NULL)
487	return NULL;
488	pos += realm_len;
489
490	if (pos + 1 > f_end) {
491	wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
492	return NULL;
493	}
494	r->eap_count = *pos++;
495	wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
496	if (pos + r->eap_count * 3 > f_end) {
497	wpa_printf(MSG_DEBUG, "No room for EAP Methods");
498	return NULL;
499	}
500	r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
501	if (r->eap == NULL)
502	return NULL;
503
504	for (e = 0; e < r->eap_count; e++) {
505	pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
506	if (pos == NULL)
507	return NULL;
508	}
509
510	return f_end;
511	}
512
513
514	static struct nai_realm * nai_realm_parse(struct wpabuf anqp, u16 count)
515	{
516	struct nai_realm *realm;
517	const u8 pos, end;
518	u16 i, num;
519	size_t left;
520
521	if (anqp == NULL)
522	return NULL;
523	left = wpabuf_len(anqp);
524	if (left < 2)
525	return NULL;
526
527	pos = wpabuf_head_u8(anqp);
528	end = pos + left;
529	num = WPA_GET_LE16(pos);
530	wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
531	pos += 2;
532	left -= 2;
533
534	if (num > left / 5) {
535	wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
536	"enough data (%u octets) for that many realms",
537	num, (unsigned int) left);
538	return NULL;
539	}
540
541	realm = os_calloc(num, sizeof(struct nai_realm));
542	if (realm == NULL)
543	return NULL;
544
545	for (i = 0; i < num; i++) {
546	pos = nai_realm_parse_realm(&realm[i], pos, end);
547	if (pos == NULL) {
548	nai_realm_free(realm, num);
549	return NULL;
550	}
551	}
552
553	*count = num;
554	return realm;
555	}
556
557
558	static int nai_realm_match(struct nai_realm realm, const char home_realm)
559	{
560	char tmp, pos, *end;
561	int match = 0;
562
563	if (realm->realm == NULL \|\| home_realm == NULL)
564	return 0;
565
566	if (os_strchr(realm->realm, ';') == NULL)
567	return os_strcasecmp(realm->realm, home_realm) == 0;
568
569	tmp = os_strdup(realm->realm);
570	if (tmp == NULL)
571	return 0;
572
573	pos = tmp;
574	while (*pos) {
575	end = os_strchr(pos, ';');
576	if (end)
577	*end = '\0';
578	if (os_strcasecmp(pos, home_realm) == 0) {
579	match = 1;
580	break;
581	}
582	if (end == NULL)
583	break;
584	pos = end + 1;
585	}
586
587	os_free(tmp);
588
589	return match;
590	}
591
592
593	static int nai_realm_cred_username(struct wpa_supplicant *wpa_s,
594	struct nai_realm_eap *eap)
595	{
596	if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
597	wpa_msg(wpa_s, MSG_DEBUG,
598	"nai-realm-cred-username: EAP method not supported: %d",
599	eap->method);
600	return 0; /* method not supported */
601	}
602
603	if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
604	eap->method != EAP_TYPE_FAST) {
605	/* Only tunneled methods with username/password supported */
606	wpa_msg(wpa_s, MSG_DEBUG,
607	"nai-realm-cred-username: Method: %d is not TTLS, PEAP, or FAST",
608	eap->method);
609	return 0;
610	}
611
612	if (eap->method == EAP_TYPE_PEAP \|\| eap->method == EAP_TYPE_FAST) {
613	if (eap->inner_method &&
614	eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
615	wpa_msg(wpa_s, MSG_DEBUG,
616	"nai-realm-cred-username: PEAP/FAST: Inner method not supported: %d",
617	eap->inner_method);
618	return 0;
619	}
620	if (!eap->inner_method &&
621	eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) {
622	wpa_msg(wpa_s, MSG_DEBUG,
623	"nai-realm-cred-username: MSCHAPv2 not supported");
624	return 0;
625	}
626	}
627
628	if (eap->method == EAP_TYPE_TTLS) {
629	if (eap->inner_method == 0 && eap->inner_non_eap == 0)
630	return 1; /* Assume TTLS/MSCHAPv2 is used */
631	if (eap->inner_method &&
632	eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
633	wpa_msg(wpa_s, MSG_DEBUG,
634	"nai-realm-cred-username: TTLS, but inner not supported: %d",
635	eap->inner_method);
636	return 0;
637	}
638	if (eap->inner_non_eap &&
639	eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
640	eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
641	eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
642	eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) {
643	wpa_msg(wpa_s, MSG_DEBUG,
644	"nai-realm-cred-username: TTLS, inner-non-eap not supported: %d",
645	eap->inner_non_eap);
646	return 0;
647	}
648	}
649
650	if (eap->inner_method &&
651	eap->inner_method != EAP_TYPE_GTC &&
652	eap->inner_method != EAP_TYPE_MSCHAPV2) {
653	wpa_msg(wpa_s, MSG_DEBUG,
654	"nai-realm-cred-username: inner-method not GTC or MSCHAPv2: %d",
655	eap->inner_method);
656	return 0;
657	}
658
659	return 1;
660	}
661
662
663	static int nai_realm_cred_cert(struct wpa_supplicant *wpa_s,
664	struct nai_realm_eap *eap)
665	{
666	if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
667	wpa_msg(wpa_s, MSG_DEBUG,
668	"nai-realm-cred-cert: Method not supported: %d",
669	eap->method);
670	return 0; /* method not supported */
671	}
672
673	if (eap->method != EAP_TYPE_TLS) {
674	/* Only EAP-TLS supported for credential authentication */
675	wpa_msg(wpa_s, MSG_DEBUG,
676	"nai-realm-cred-cert: Method not TLS: %d",
677	eap->method);
678	return 0;
679	}
680
681	return 1;
682	}
683
684
685	static struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s,
686	struct wpa_cred *cred,
687	struct nai_realm *realm)
688	{
689	u8 e;
690
691	if (cred->username == NULL \|\|
692	cred->username[0] == '\0' \|\|
693	((cred->password == NULL \|\|
694	cred->password[0] == '\0') &&
695	(cred->private_key == NULL \|\|
696	cred->private_key[0] == '\0'))) {
697	wpa_msg(wpa_s, MSG_DEBUG,
698	"nai-realm-find-eap: incomplete cred info: username: %s password: %s private_key: %s",
699	cred->username ? cred->username : "NULL",
700	cred->password ? cred->password : "NULL",
701	cred->private_key ? cred->private_key : "NULL");
702	return NULL;
703	}
704
705	for (e = 0; e < realm->eap_count; e++) {
706	struct nai_realm_eap *eap = &realm->eap[e];
707	if (cred->password && cred->password[0] &&
708	nai_realm_cred_username(wpa_s, eap))
709	return eap;
710	if (cred->private_key && cred->private_key[0] &&
711	nai_realm_cred_cert(wpa_s, eap))
712	return eap;
713	}
714
715	return NULL;
716	}
717
718
719	#ifdef INTERWORKING_3GPP
720
721	static int plmn_id_match(struct wpabuf anqp, const char imsi, int mnc_len)
722	{
723	u8 plmn[3], plmn2[3];
724	const u8 pos, end;
725	u8 udhl;
726
727	/*
728	* See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
729	* operator is allowed to include only two digits of the MNC, so allow
730	* matches based on both two and three digit MNC assumptions. Since some
731	* SIM/USIM cards may not expose MNC length conveniently, we may be
732	* provided the default MNC length 3 here and as such, checking with MNC
733	* length 2 is justifiable even though 3GPP TS 24.234 does not mention
734	* that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
735	* with otherwise matching values would not be good idea in general, so
736	* this should not result in selecting incorrect networks.
737	*/
738	/* Match with 3 digit MNC */
739	plmn[0] = (imsi[0] - '0') \| ((imsi[1] - '0') << 4);
740	plmn[1] = (imsi[2] - '0') \| ((imsi[5] - '0') << 4);
741	plmn[2] = (imsi[3] - '0') \| ((imsi[4] - '0') << 4);
742	/* Match with 2 digit MNC */
743	plmn2[0] = (imsi[0] - '0') \| ((imsi[1] - '0') << 4);
744	plmn2[1] = (imsi[2] - '0') \| 0xf0;
745	plmn2[2] = (imsi[3] - '0') \| ((imsi[4] - '0') << 4);
746
747	if (anqp == NULL)
748	return 0;
749	pos = wpabuf_head_u8(anqp);
750	end = pos + wpabuf_len(anqp);
751	if (pos + 2 > end)
752	return 0;
753	if (*pos != 0) {
754	wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
755	return 0;
756	}
757	pos++;
758	udhl = *pos++;
759	if (pos + udhl > end) {
760	wpa_printf(MSG_DEBUG, "Invalid UDHL");
761	return 0;
762	}
763	end = pos + udhl;
764
765	wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
766	plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
767	imsi, mnc_len);
768
769	while (pos + 2 <= end) {
770	u8 iei, len;
771	const u8 *l_end;
772	iei = *pos++;
773	len = *pos++ & 0x7f;
774	if (pos + len > end)
775	break;
776	l_end = pos + len;
777
778	if (iei == 0 && len > 0) {
779	/* PLMN List */
780	u8 num, i;
781	wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
782	pos, len);
783	num = *pos++;
784	for (i = 0; i < num; i++) {
785	if (pos + 3 > l_end)
786	break;
787	if (os_memcmp(pos, plmn, 3) == 0 \|\|
788	os_memcmp(pos, plmn2, 3) == 0)
789	return 1; /* Found matching PLMN */
790	pos += 3;
791	}
792	} else {
793	wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
794	pos, len);
795	}
796
797	pos = l_end;
798	}
799
800	return 0;
801	}
802
803
804	static int build_root_nai(char nai, size_t nai_len, const char imsi,
805	size_t mnc_len, char prefix)
806	{
807	const char sep, msin;
808	char end, pos;
809	size_t msin_len, plmn_len;
810
811	/*
812	* TS 23.003, Clause 14 (3GPP to WLAN Interworking)
813	* Root NAI:
814	* <aka:0\|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
815	* <MNC> is zero-padded to three digits in case two-digit MNC is used
816	*/
817
818	if (imsi == NULL \|\| os_strlen(imsi) > 16) {
819	wpa_printf(MSG_DEBUG, "No valid IMSI available");
820	return -1;
821	}
822	sep = os_strchr(imsi, '-');
823	if (sep) {
824	plmn_len = sep - imsi;
825	msin = sep + 1;
826	} else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
827	plmn_len = 3 + mnc_len;
828	msin = imsi + plmn_len;
829	} else
830	return -1;
831	if (plmn_len != 5 && plmn_len != 6)
832	return -1;
833	msin_len = os_strlen(msin);
834
835	pos = nai;
836	end = nai + nai_len;
837	if (prefix)
838	*pos++ = prefix;
839	os_memcpy(pos, imsi, plmn_len);
840	pos += plmn_len;
841	os_memcpy(pos, msin, msin_len);
842	pos += msin_len;
843	pos += os_snprintf(pos, end - pos, "@wlan.mnc");
844	if (plmn_len == 5) {
845	*pos++ = '0';
846	*pos++ = imsi[3];
847	*pos++ = imsi[4];
848	} else {
849	*pos++ = imsi[3];
850	*pos++ = imsi[4];
851	*pos++ = imsi[5];
852	}
853	os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
854	imsi[0], imsi[1], imsi[2]);
855
856	return 0;
857	}
858
859
860	static int set_root_nai(struct wpa_ssid ssid, const char imsi, char prefix)
861	{
862	char nai[100];
863	if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
864	return -1;
865	return wpa_config_set_quoted(ssid, "identity", nai);
866	}
867
868	#endif /* INTERWORKING_3GPP */
869
870
871	static int already_connected(struct wpa_supplicant *wpa_s,
872	struct wpa_cred cred, struct wpa_bss bss)
873	{
874	struct wpa_ssid ssid, sel_ssid;
875	struct wpa_bss *selected;
876
877	if (wpa_s->wpa_state < WPA_ASSOCIATED \|\| wpa_s->current_ssid == NULL)
878	return 0;
879
880	ssid = wpa_s->current_ssid;
881	if (ssid->parent_cred != cred)
882	return 0;
883
884	if (ssid->ssid_len != bss->ssid_len \|\|
885	os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
886	return 0;
887
888	sel_ssid = NULL;
889	selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid);
890	if (selected && sel_ssid && sel_ssid->priority > ssid->priority)
891	return 0; /* higher priority network in scan results */
892
893	return 1;
894	}
895
896
897	static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
898	struct wpa_cred *cred,
899	struct wpa_bss *bss)
900	{
901	struct wpa_ssid *ssid;
902
903	for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
904	if (ssid->parent_cred != cred)
905	continue;
906	if (ssid->ssid_len != bss->ssid_len \|\|
907	os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
908	continue;
909
910	break;
911	}
912
913	if (ssid == NULL)
914	return;
915
916	wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
917
918	if (ssid == wpa_s->current_ssid) {
919	wpa_sm_set_config(wpa_s->wpa, NULL);
920	eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
921	wpa_s->own_disconnect_req = 1;
922	wpa_supplicant_deauthenticate(wpa_s,
923	WLAN_REASON_DEAUTH_LEAVING);
924	}
925
926	wpas_notify_network_removed(wpa_s, ssid);
927	wpa_config_remove_network(wpa_s->conf, ssid->id);
928	}
929
930
931	static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
932	struct wpa_ssid *ssid)
933	{
934	const char *key_mgmt = NULL;
935	#ifdef CONFIG_IEEE80211R
936	int res;
937	struct wpa_driver_capa capa;
938
939	res = wpa_drv_get_capa(wpa_s, &capa);
940	if (res == 0 && capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_FT) {
941	key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
942	"WPA-EAP WPA-EAP-SHA256 FT-EAP" :
943	"WPA-EAP FT-EAP";
944	}
945	#endif /* CONFIG_IEEE80211R */
946
947	if (!key_mgmt)
948	key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
949	"WPA-EAP WPA-EAP-SHA256" : "WPA-EAP";
950	if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0)
951	return -1;
952	if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
953	return -1;
954	if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
955	return -1;
956	return 0;
957	}
958
959
960	static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
961	struct wpa_cred *cred,
962	struct wpa_bss *bss, int only_add)
963	{
964	#ifdef INTERWORKING_3GPP
965	struct wpa_ssid *ssid;
966	int eap_type;
967	int res;
968	char prefix;
969
970	if (bss->anqp == NULL \|\| bss->anqp->anqp_3gpp == NULL)
971	return -1;
972
973	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
974	" (3GPP)", MAC2STR(bss->bssid));
975
976	if (already_connected(wpa_s, cred, bss)) {
977	wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
978	MAC2STR(bss->bssid));
979	return wpa_s->current_ssid->id;
980	}
981
982	remove_duplicate_network(wpa_s, cred, bss);
983
984	ssid = wpa_config_add_network(wpa_s->conf);
985	if (ssid == NULL)
986	return -1;
987	ssid->parent_cred = cred;
988
989	wpas_notify_network_added(wpa_s, ssid);
990	wpa_config_set_network_defaults(ssid);
991	ssid->priority = cred->priority;
992	ssid->temporary = 1;
993	ssid->ssid = os_zalloc(bss->ssid_len + 1);
994	if (ssid->ssid == NULL)
995	goto fail;
996	os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
997	ssid->ssid_len = bss->ssid_len;
998	ssid->eap.sim_num = cred->sim_num;
999
1000	if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1001	goto fail;
1002
1003	eap_type = EAP_TYPE_SIM;
1004	if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
1005	eap_type = EAP_TYPE_AKA;
1006	if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
1007	if (cred->eap_method[0].method == EAP_TYPE_SIM \|\|
1008	cred->eap_method[0].method == EAP_TYPE_AKA \|\|
1009	cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
1010	eap_type = cred->eap_method[0].method;
1011	}
1012
1013	switch (eap_type) {
1014	case EAP_TYPE_SIM:
1015	prefix = '1';
1016	res = wpa_config_set(ssid, "eap", "SIM", 0);
1017	break;
1018	case EAP_TYPE_AKA:
1019	prefix = '0';
1020	res = wpa_config_set(ssid, "eap", "AKA", 0);
1021	break;
1022	case EAP_TYPE_AKA_PRIME:
1023	prefix = '6';
1024	res = wpa_config_set(ssid, "eap", "AKA'", 0);
1025	break;
1026	default:
1027	res = -1;
1028	break;
1029	}
1030	if (res < 0) {
1031	wpa_msg(wpa_s, MSG_DEBUG,
1032	"Selected EAP method (%d) not supported", eap_type);
1033	goto fail;
1034	}
1035
1036	if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
1037	wpa_msg(wpa_s, MSG_DEBUG, "Failed to set Root NAI");
1038	goto fail;
1039	}
1040
1041	if (cred->milenage && cred->milenage[0]) {
1042	if (wpa_config_set_quoted(ssid, "password",
1043	cred->milenage) < 0)
1044	goto fail;
1045	} else if (cred->pcsc) {
1046	if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
1047	goto fail;
1048	if (wpa_s->conf->pcsc_pin &&
1049	wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
1050	< 0)
1051	goto fail;
1052	}
1053
1054	wpa_s->next_ssid = ssid;
1055	wpa_config_update_prio_list(wpa_s->conf);
1056	if (!only_add)
1057	interworking_reconnect(wpa_s);
1058
1059	return ssid->id;
1060
1061	fail:
1062	wpas_notify_network_removed(wpa_s, ssid);
1063	wpa_config_remove_network(wpa_s->conf, ssid->id);
1064	#endif /* INTERWORKING_3GPP */
1065	return -1;
1066	}
1067
1068
1069	static int roaming_consortium_element_match(const u8 ie, const u8 rc_id,
1070	size_t rc_len)
1071	{
1072	const u8 pos, end;
1073	u8 lens;
1074
1075	if (ie == NULL)
1076	return 0;
1077
1078	pos = ie + 2;
1079	end = ie + 2 + ie[1];
1080
1081	/* Roaming Consortium element:
1082	* Number of ANQP OIs
1083	* OI #1 and #2 lengths
1084	* OI #1, [OI #2], [OI #3]
1085	*/
1086
1087	if (pos + 2 > end)
1088	return 0;
1089
1090	pos++; /* skip Number of ANQP OIs */
1091	lens = *pos++;
1092	if (pos + (lens & 0x0f) + (lens >> 4) > end)
1093	return 0;
1094
1095	if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1096	return 1;
1097	pos += lens & 0x0f;
1098
1099	if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1100	return 1;
1101	pos += lens >> 4;
1102
1103	if (pos < end && (size_t) (end - pos) == rc_len &&
1104	os_memcmp(pos, rc_id, rc_len) == 0)
1105	return 1;
1106
1107	return 0;
1108	}
1109
1110
1111	static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
1112	const u8 *rc_id, size_t rc_len)
1113	{
1114	const u8 pos, end;
1115	u8 len;
1116
1117	if (anqp == NULL)
1118	return 0;
1119
1120	pos = wpabuf_head(anqp);
1121	end = pos + wpabuf_len(anqp);
1122
1123	/* Set of <OI Length, OI> duples */
1124	while (pos < end) {
1125	len = *pos++;
1126	if (pos + len > end)
1127	break;
1128	if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1129	return 1;
1130	pos += len;
1131	}
1132
1133	return 0;
1134	}
1135
1136
1137	static int roaming_consortium_match(const u8 ie, const struct wpabuf anqp,
1138	const u8 *rc_id, size_t rc_len)
1139	{
1140	return roaming_consortium_element_match(ie, rc_id, rc_len) \|\|
1141	roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1142	}
1143
1144
1145	static int cred_no_required_oi_match(struct wpa_cred cred, struct wpa_bss bss)
1146	{
1147	const u8 *ie;
1148
1149	if (cred->required_roaming_consortium_len == 0)
1150	return 0;
1151
1152	ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1153
1154	if (ie == NULL &&
1155	(bss->anqp == NULL \|\| bss->anqp->roaming_consortium == NULL))
1156	return 1;
1157
1158	return !roaming_consortium_match(ie,
1159	bss->anqp ?
1160	bss->anqp->roaming_consortium : NULL,
1161	cred->required_roaming_consortium,
1162	cred->required_roaming_consortium_len);
1163	}
1164
1165
1166	static int cred_excluded_ssid(struct wpa_cred cred, struct wpa_bss bss)
1167	{
1168	size_t i;
1169
1170	if (!cred->excluded_ssid)
1171	return 0;
1172
1173	for (i = 0; i < cred->num_excluded_ssid; i++) {
1174	struct excluded_ssid *e = &cred->excluded_ssid[i];
1175	if (bss->ssid_len == e->ssid_len &&
1176	os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1177	return 1;
1178	}
1179
1180	return 0;
1181	}
1182
1183
1184	static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
1185	struct wpa_cred cred, struct wpa_bss bss)
1186	{
1187	int res;
1188	unsigned int dl_bandwidth, ul_bandwidth;
1189	const u8 *wan;
1190	u8 wan_info, dl_load, ul_load;
1191	u16 lmd;
1192	u32 ul_speed, dl_speed;
1193
1194	if (!cred->min_dl_bandwidth_home &&
1195	!cred->min_ul_bandwidth_home &&
1196	!cred->min_dl_bandwidth_roaming &&
1197	!cred->min_ul_bandwidth_roaming)
1198	return 0; /* No bandwidth constraint specified */
1199
1200	if (bss->anqp == NULL \|\| bss->anqp->hs20_wan_metrics == NULL)
1201	return 0; /* No WAN Metrics known - ignore constraint */
1202
1203	wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
1204	wan_info = wan[0];
1205	if (wan_info & BIT(3))
1206	return 1; /* WAN link at capacity */
1207	lmd = WPA_GET_LE16(wan + 11);
1208	if (lmd == 0)
1209	return 0; /* Downlink/Uplink Load was not measured */
1210	dl_speed = WPA_GET_LE32(wan + 1);
1211	ul_speed = WPA_GET_LE32(wan + 5);
1212	dl_load = wan[9];
1213	ul_load = wan[10];
1214
1215	if (dl_speed >= 0xffffff)
1216	dl_bandwidth = dl_speed / 255 * (255 - dl_load);
1217	else
1218	dl_bandwidth = dl_speed * (255 - dl_load) / 255;
1219
1220	if (ul_speed >= 0xffffff)
1221	ul_bandwidth = ul_speed / 255 * (255 - ul_load);
1222	else
1223	ul_bandwidth = ul_speed * (255 - ul_load) / 255;
1224
1225	res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1226	bss->anqp->domain_name : NULL);
1227	if (res > 0) {
1228	if (cred->min_dl_bandwidth_home > dl_bandwidth)
1229	return 1;
1230	if (cred->min_ul_bandwidth_home > ul_bandwidth)
1231	return 1;
1232	} else {
1233	if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
1234	return 1;
1235	if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
1236	return 1;
1237	}
1238
1239	return 0;
1240	}
1241
1242
1243	static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
1244	struct wpa_cred cred, struct wpa_bss bss)
1245	{
1246	const u8 *ie;
1247	int res;
1248
1249	if (!cred->max_bss_load)
1250	return 0; /* No BSS Load constraint specified */
1251
1252	ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
1253	if (ie == NULL \|\| ie[1] < 3)
1254	return 0; /* No BSS Load advertised */
1255
1256	res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1257	bss->anqp->domain_name : NULL);
1258	if (res <= 0)
1259	return 0; /* Not a home network */
1260
1261	return ie[4] > cred->max_bss_load;
1262	}
1263
1264
1265	static int has_proto_match(const u8 pos, const u8 end, u8 proto)
1266	{
1267	while (pos + 4 <= end) {
1268	if (pos[0] == proto && pos[3] == 1 /* Open */)
1269	return 1;
1270	pos += 4;
1271	}
1272
1273	return 0;
1274	}
1275
1276
1277	static int has_proto_port_match(const u8 pos, const u8 end, u8 proto,
1278	u16 port)
1279	{
1280	while (pos + 4 <= end) {
1281	if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
1282	pos[3] == 1 /* Open */)
1283	return 1;
1284	pos += 4;
1285	}
1286
1287	return 0;
1288	}
1289
1290
1291	static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
1292	struct wpa_cred cred, struct wpa_bss bss)
1293	{
1294	int res;
1295	const u8 capab, end;
1296	unsigned int i, j;
1297	int *ports;
1298
1299	if (!cred->num_req_conn_capab)
1300	return 0; /* No connection capability constraint specified */
1301
1302	if (bss->anqp == NULL \|\| bss->anqp->hs20_connection_capability == NULL)
1303	return 0; /* No Connection Capability known - ignore constraint
1304	*/
1305
1306	res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1307	bss->anqp->domain_name : NULL);
1308	if (res > 0)
1309	return 0; /* No constraint in home network */
1310
1311	capab = wpabuf_head(bss->anqp->hs20_connection_capability);
1312	end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
1313
1314	for (i = 0; i < cred->num_req_conn_capab; i++) {
1315	ports = cred->req_conn_capab_port[i];
1316	if (!ports) {
1317	if (!has_proto_match(capab, end,
1318	cred->req_conn_capab_proto[i]))
1319	return 1;
1320	} else {
1321	for (j = 0; ports[j] > -1; j++) {
1322	if (!has_proto_port_match(
1323	capab, end,
1324	cred->req_conn_capab_proto[i],
1325	ports[j]))
1326	return 1;
1327	}
1328	}
1329	}
1330
1331	return 0;
1332	}
1333
1334
1335	static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1336	struct wpa_supplicant wpa_s, struct wpa_bss bss, int ignore_bw,
1337	int *excluded)
1338	{
1339	struct wpa_cred cred, selected = NULL;
1340	const u8 *ie;
1341	int is_excluded = 0;
1342
1343	ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1344
1345	if (ie == NULL &&
1346	(bss->anqp == NULL \|\| bss->anqp->roaming_consortium == NULL))
1347	return NULL;
1348
1349	if (wpa_s->conf->cred == NULL)
1350	return NULL;
1351
1352	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1353	if (cred->roaming_consortium_len == 0)
1354	continue;
1355
1356	if (!roaming_consortium_match(ie,
1357	bss->anqp ?
1358	bss->anqp->roaming_consortium :
1359	NULL,
1360	cred->roaming_consortium,
1361	cred->roaming_consortium_len))
1362	continue;
1363
1364	if (cred_no_required_oi_match(cred, bss))
1365	continue;
1366	if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1367	continue;
1368	if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1369	continue;
1370	if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1371	continue;
1372	if (cred_excluded_ssid(cred, bss)) {
1373	if (excluded == NULL)
1374	continue;
1375	if (selected == NULL) {
1376	selected = cred;
1377	is_excluded = 1;
1378	}
1379	} else {
1380	if (selected == NULL \|\| is_excluded \|\|
1381	cred_prio_cmp(selected, cred) < 0) {
1382	selected = cred;
1383	is_excluded = 0;
1384	}
1385	}
1386	}
1387
1388	if (excluded)
1389	*excluded = is_excluded;
1390
1391	return selected;
1392	}
1393
1394
1395	static int interworking_set_eap_params(struct wpa_ssid *ssid,
1396	struct wpa_cred *cred, int ttls)
1397	{
1398	if (cred->eap_method) {
1399	ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1400	cred->eap_method->method == EAP_TYPE_TTLS;
1401
1402	os_free(ssid->eap.eap_methods);
1403	ssid->eap.eap_methods =
1404	os_malloc(sizeof(struct eap_method_type) * 2);
1405	if (ssid->eap.eap_methods == NULL)
1406	return -1;
1407	os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1408	sizeof(*cred->eap_method));
1409	ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1410	ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1411	}
1412
1413	if (ttls && cred->username && cred->username[0]) {
1414	const char *pos;
1415	char *anon;
1416	/* Use anonymous NAI in Phase 1 */
1417	pos = os_strchr(cred->username, '@');
1418	if (pos) {
1419	size_t buflen = 9 + os_strlen(pos) + 1;
1420	anon = os_malloc(buflen);
1421	if (anon == NULL)
1422	return -1;
1423	os_snprintf(anon, buflen, "anonymous%s", pos);
1424	} else if (cred->realm) {
1425	size_t buflen = 10 + os_strlen(cred->realm) + 1;
1426	anon = os_malloc(buflen);
1427	if (anon == NULL)
1428	return -1;
1429	os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1430	} else {
1431	anon = os_strdup("anonymous");
1432	if (anon == NULL)
1433	return -1;
1434	}
1435	if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1436	0) {
1437	os_free(anon);
1438	return -1;
1439	}
1440	os_free(anon);
1441	}
1442
1443	if (cred->username && cred->username[0] &&
1444	wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1445	return -1;
1446
1447	if (cred->password && cred->password[0]) {
1448	if (cred->ext_password &&
1449	wpa_config_set(ssid, "password", cred->password, 0) < 0)
1450	return -1;
1451	if (!cred->ext_password &&
1452	wpa_config_set_quoted(ssid, "password", cred->password) <
1453	0)
1454	return -1;
1455	}
1456
1457	if (cred->client_cert && cred->client_cert[0] &&
1458	wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1459	return -1;
1460
1461	#ifdef ANDROID
1462	if (cred->private_key &&
1463	os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1464	/* Use OpenSSL engine configuration for Android keystore */
1465	if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 \|\|
1466	wpa_config_set_quoted(ssid, "key_id",
1467	cred->private_key + 11) < 0 \|\|
1468	wpa_config_set(ssid, "engine", "1", 0) < 0)
1469	return -1;
1470	} else
1471	#endif /* ANDROID */
1472	if (cred->private_key && cred->private_key[0] &&
1473	wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1474	return -1;
1475
1476	if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1477	wpa_config_set_quoted(ssid, "private_key_passwd",
1478	cred->private_key_passwd) < 0)
1479	return -1;
1480
1481	if (cred->phase1) {
1482	os_free(ssid->eap.phase1);
1483	ssid->eap.phase1 = os_strdup(cred->phase1);
1484	}
1485	if (cred->phase2) {
1486	os_free(ssid->eap.phase2);
1487	ssid->eap.phase2 = os_strdup(cred->phase2);
1488	}
1489
1490	if (cred->ca_cert && cred->ca_cert[0] &&
1491	wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1492	return -1;
1493
1494	if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1495	wpa_config_set_quoted(ssid, "domain_suffix_match",
1496	cred->domain_suffix_match) < 0)
1497	return -1;
1498
1499	ssid->eap.ocsp = cred->ocsp;
1500
1501	return 0;
1502	}
1503
1504
1505	static int interworking_connect_roaming_consortium(
1506	struct wpa_supplicant wpa_s, struct wpa_cred cred,
1507	struct wpa_bss *bss, int only_add)
1508	{
1509	struct wpa_ssid *ssid;
1510
1511	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
1512	" based on roaming consortium match", MAC2STR(bss->bssid));
1513
1514	if (already_connected(wpa_s, cred, bss)) {
1515	wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1516	MAC2STR(bss->bssid));
1517	return wpa_s->current_ssid->id;
1518	}
1519
1520	remove_duplicate_network(wpa_s, cred, bss);
1521
1522	ssid = wpa_config_add_network(wpa_s->conf);
1523	if (ssid == NULL)
1524	return -1;
1525	ssid->parent_cred = cred;
1526	wpas_notify_network_added(wpa_s, ssid);
1527	wpa_config_set_network_defaults(ssid);
1528	ssid->priority = cred->priority;
1529	ssid->temporary = 1;
1530	ssid->ssid = os_zalloc(bss->ssid_len + 1);
1531	if (ssid->ssid == NULL)
1532	goto fail;
1533	os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1534	ssid->ssid_len = bss->ssid_len;
1535
1536	if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1537	goto fail;
1538
1539	if (cred->eap_method == NULL) {
1540	wpa_msg(wpa_s, MSG_DEBUG,
1541	"Interworking: No EAP method set for credential using roaming consortium");
1542	goto fail;
1543	}
1544
1545	if (interworking_set_eap_params(
1546	ssid, cred,
1547	cred->eap_method->vendor == EAP_VENDOR_IETF &&
1548	cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1549	goto fail;
1550
1551	wpa_s->next_ssid = ssid;
1552	wpa_config_update_prio_list(wpa_s->conf);
1553	if (!only_add)
1554	interworking_reconnect(wpa_s);
1555
1556	return ssid->id;
1557
1558	fail:
1559	wpas_notify_network_removed(wpa_s, ssid);
1560	wpa_config_remove_network(wpa_s->conf, ssid->id);
1561	return -1;
1562	}
1563
1564
1565	static int interworking_connect_helper(struct wpa_supplicant *wpa_s,
1566	struct wpa_bss *bss, int allow_excluded,
1567	int only_add)
1568	{
1569	struct wpa_cred cred, cred_rc, *cred_3gpp;
1570	struct wpa_ssid *ssid;
1571	struct nai_realm *realm;
1572	struct nai_realm_eap *eap = NULL;
1573	u16 count, i;
1574	char buf[100];
1575	int excluded = 0, *excl = allow_excluded ? &excluded : NULL;
1576	const char *name;
1577
1578	if (wpa_s->conf->cred == NULL \|\| bss == NULL)
1579	return -1;
1580	if (disallowed_bssid(wpa_s, bss->bssid) \|\|
1581	disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1582	wpa_msg(wpa_s, MSG_DEBUG,
1583	"Interworking: Reject connection to disallowed BSS "
1584	MACSTR, MAC2STR(bss->bssid));
1585	return -1;
1586	}
1587
1588	wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1589	" for connection (allow_excluded=%d)",
1590	MAC2STR(bss->bssid), allow_excluded);
1591
1592	if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1593	/*
1594	* We currently support only HS 2.0 networks and those are
1595	* required to use WPA2-Enterprise.
1596	*/
1597	wpa_msg(wpa_s, MSG_DEBUG,
1598	"Interworking: Network does not use RSN");
1599	return -1;
1600	}
1601
1602	cred_rc = interworking_credentials_available_roaming_consortium(
1603	wpa_s, bss, 0, excl);
1604	if (cred_rc) {
1605	wpa_msg(wpa_s, MSG_DEBUG,
1606	"Interworking: Highest roaming consortium matching credential priority %d sp_priority %d",
1607	cred_rc->priority, cred_rc->sp_priority);
1608	if (allow_excluded && excl && !(*excl))
1609	excl = NULL;
1610	}
1611
1612	cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1613	if (cred) {
1614	wpa_msg(wpa_s, MSG_DEBUG,
1615	"Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d",
1616	cred->priority, cred->sp_priority);
1617	if (allow_excluded && excl && !(*excl))
1618	excl = NULL;
1619	}
1620
1621	cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1622	excl);
1623	if (cred_3gpp) {
1624	wpa_msg(wpa_s, MSG_DEBUG,
1625	"Interworking: Highest 3GPP matching credential priority %d sp_priority %d",
1626	cred_3gpp->priority, cred_3gpp->sp_priority);
1627	if (allow_excluded && excl && !(*excl))
1628	excl = NULL;
1629	}
1630
1631	if (!cred_rc && !cred && !cred_3gpp) {
1632	wpa_msg(wpa_s, MSG_DEBUG,
1633	"Interworking: No full credential matches - consider options without BW(etc.) limits");
1634	cred_rc = interworking_credentials_available_roaming_consortium(
1635	wpa_s, bss, 1, excl);
1636	if (cred_rc) {
1637	wpa_msg(wpa_s, MSG_DEBUG,
1638	"Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)",
1639	cred_rc->priority, cred_rc->sp_priority);
1640	if (allow_excluded && excl && !(*excl))
1641	excl = NULL;
1642	}
1643
1644	cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1645	excl);
1646	if (cred) {
1647	wpa_msg(wpa_s, MSG_DEBUG,
1648	"Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)",
1649	cred->priority, cred->sp_priority);
1650	if (allow_excluded && excl && !(*excl))
1651	excl = NULL;
1652	}
1653
1654	cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1655	1, excl);
1656	if (cred_3gpp) {
1657	wpa_msg(wpa_s, MSG_DEBUG,
1658	"Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)",
1659	cred_3gpp->priority, cred_3gpp->sp_priority);
1660	if (allow_excluded && excl && !(*excl))
1661	excl = NULL;
1662	}
1663	}
1664
1665	if (cred_rc &&
1666	(cred == NULL \|\| cred_prio_cmp(cred_rc, cred) >= 0) &&
1667	(cred_3gpp == NULL \|\| cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1668	return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1669	bss, only_add);
1670
1671	if (cred_3gpp &&
1672	(cred == NULL \|\| cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1673	return interworking_connect_3gpp(wpa_s, cred_3gpp, bss,
1674	only_add);
1675	}
1676
1677	if (cred == NULL) {
1678	wpa_msg(wpa_s, MSG_DEBUG,
1679	"Interworking: No matching credentials found for "
1680	MACSTR, MAC2STR(bss->bssid));
1681	return -1;
1682	}
1683
1684	realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1685	&count);
1686	if (realm == NULL) {
1687	wpa_msg(wpa_s, MSG_DEBUG,
1688	"Interworking: Could not parse NAI Realm list from "
1689	MACSTR, MAC2STR(bss->bssid));
1690	return -1;
1691	}
1692
1693	for (i = 0; i < count; i++) {
1694	if (!nai_realm_match(&realm[i], cred->realm))
1695	continue;
1696	eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1697	if (eap)
1698	break;
1699	}
1700
1701	if (!eap) {
1702	wpa_msg(wpa_s, MSG_DEBUG,
1703	"Interworking: No matching credentials and EAP method found for "
1704	MACSTR, MAC2STR(bss->bssid));
1705	nai_realm_free(realm, count);
1706	return -1;
1707	}
1708
1709	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR,
1710	MAC2STR(bss->bssid));
1711
1712	if (already_connected(wpa_s, cred, bss)) {
1713	wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1714	MAC2STR(bss->bssid));
1715	nai_realm_free(realm, count);
1716	return 0;
1717	}
1718
1719	remove_duplicate_network(wpa_s, cred, bss);
1720
1721	ssid = wpa_config_add_network(wpa_s->conf);
1722	if (ssid == NULL) {
1723	nai_realm_free(realm, count);
1724	return -1;
1725	}
1726	ssid->parent_cred = cred;
1727	wpas_notify_network_added(wpa_s, ssid);
1728	wpa_config_set_network_defaults(ssid);
1729	ssid->priority = cred->priority;
1730	ssid->temporary = 1;
1731	ssid->ssid = os_zalloc(bss->ssid_len + 1);
1732	if (ssid->ssid == NULL)
1733	goto fail;
1734	os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1735	ssid->ssid_len = bss->ssid_len;
1736
1737	if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1738	goto fail;
1739
1740	if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1741	eap->method), 0) < 0)
1742	goto fail;
1743
1744	switch (eap->method) {
1745	case EAP_TYPE_TTLS:
1746	if (eap->inner_method) {
1747	os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1748	eap_get_name(EAP_VENDOR_IETF,
1749	eap->inner_method));
1750	if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1751	goto fail;
1752	break;
1753	}
1754	switch (eap->inner_non_eap) {
1755	case NAI_REALM_INNER_NON_EAP_PAP:
1756	if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1757	0)
1758	goto fail;
1759	break;
1760	case NAI_REALM_INNER_NON_EAP_CHAP:
1761	if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1762	< 0)
1763	goto fail;
1764	break;
1765	case NAI_REALM_INNER_NON_EAP_MSCHAP:
1766	if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1767	0) < 0)
1768	goto fail;
1769	break;
1770	case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1771	if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1772	0) < 0)
1773	goto fail;
1774	break;
1775	default:
1776	/* EAP params were not set - assume TTLS/MSCHAPv2 */
1777	if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1778	0) < 0)
1779	goto fail;
1780	break;
1781	}
1782	break;
1783	case EAP_TYPE_PEAP:
1784	case EAP_TYPE_FAST:
1785	if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1786	0) < 0)
1787	goto fail;
1788	if (wpa_config_set(ssid, "pac_file",
1789	"\"blob://pac_interworking\"", 0) < 0)
1790	goto fail;
1791	name = eap_get_name(EAP_VENDOR_IETF,
1792	eap->inner_method ? eap->inner_method :
1793	EAP_TYPE_MSCHAPV2);
1794	if (name == NULL)
1795	goto fail;
1796	os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1797	if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1798	goto fail;
1799	break;
1800	case EAP_TYPE_TLS:
1801	break;
1802	}
1803
1804	if (interworking_set_eap_params(ssid, cred,
1805	eap->method == EAP_TYPE_TTLS) < 0)
1806	goto fail;
1807
1808	nai_realm_free(realm, count);
1809
1810	wpa_s->next_ssid = ssid;
1811	wpa_config_update_prio_list(wpa_s->conf);
1812	if (!only_add)
1813	interworking_reconnect(wpa_s);
1814
1815	return ssid->id;
1816
1817	fail:
1818	wpas_notify_network_removed(wpa_s, ssid);
1819	wpa_config_remove_network(wpa_s->conf, ssid->id);
1820	nai_realm_free(realm, count);
1821	return -1;
1822	}
1823
1824
1825	int interworking_connect(struct wpa_supplicant wpa_s, struct wpa_bss bss,
1826	int only_add)
1827	{
1828	return interworking_connect_helper(wpa_s, bss, 1, only_add);
1829	}
1830
1831
1832	#ifdef PCSC_FUNCS
1833	static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1834	{
1835	size_t len;
1836
1837	if (wpa_s->imsi[0] && wpa_s->mnc_len)
1838	return 0;
1839
1840	len = sizeof(wpa_s->imsi) - 1;
1841	if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1842	scard_deinit(wpa_s->scard);
1843	wpa_s->scard = NULL;
1844	wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1845	return -1;
1846	}
1847	wpa_s->imsi[len] = '\0';
1848	wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1849	wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1850	wpa_s->imsi, wpa_s->mnc_len);
1851
1852	return 0;
1853	}
1854	#endif /* PCSC_FUNCS */
1855
1856
1857	static struct wpa_cred * interworking_credentials_available_3gpp(
1858	struct wpa_supplicant wpa_s, struct wpa_bss bss, int ignore_bw,
1859	int *excluded)
1860	{
1861	struct wpa_cred *selected = NULL;
1862	#ifdef INTERWORKING_3GPP
1863	struct wpa_cred *cred;
1864	int ret;
1865	int is_excluded = 0;
1866
1867	if (bss->anqp == NULL \|\| bss->anqp->anqp_3gpp == NULL) {
1868	wpa_msg(wpa_s, MSG_DEBUG,
1869	"interworking-avail-3gpp: not avail, anqp: %p anqp_3gpp: %p",
1870	bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
1871	return NULL;
1872	}
1873
1874	#ifdef CONFIG_EAP_PROXY
1875	if (!wpa_s->imsi[0]) {
1876	size_t len;
1877	wpa_msg(wpa_s, MSG_DEBUG,
1878	"Interworking: IMSI not available - try to read again through eap_proxy");
1879	wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1880	wpa_s->imsi,
1881	&len);
1882	if (wpa_s->mnc_len > 0) {
1883	wpa_s->imsi[len] = '\0';
1884	wpa_msg(wpa_s, MSG_DEBUG,
1885	"eap_proxy: IMSI %s (MNC length %d)",
1886	wpa_s->imsi, wpa_s->mnc_len);
1887	} else {
1888	wpa_msg(wpa_s, MSG_DEBUG,
1889	"eap_proxy: IMSI not available");
1890	}
1891	}
1892	#endif /* CONFIG_EAP_PROXY */
1893
1894	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1895	char *sep;
1896	const char *imsi;
1897	int mnc_len;
1898	char imsi_buf[16];
1899	size_t msin_len;
1900
1901	#ifdef PCSC_FUNCS
1902	if (cred->pcsc && wpa_s->scard) {
1903	if (interworking_pcsc_read_imsi(wpa_s) < 0)
1904	continue;
1905	imsi = wpa_s->imsi;
1906	mnc_len = wpa_s->mnc_len;
1907	goto compare;
1908	}
1909	#endif /* PCSC_FUNCS */
1910	#ifdef CONFIG_EAP_PROXY
1911	if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1912	imsi = wpa_s->imsi;
1913	mnc_len = wpa_s->mnc_len;
1914	goto compare;
1915	}
1916	#endif /* CONFIG_EAP_PROXY */
1917
1918	if (cred->imsi == NULL \|\| !cred->imsi[0] \|\|
1919	(!wpa_s->conf->external_sim &&
1920	(cred->milenage == NULL \|\| !cred->milenage[0])))
1921	continue;
1922
1923	sep = os_strchr(cred->imsi, '-');
1924	if (sep == NULL \|\|
1925	(sep - cred->imsi != 5 && sep - cred->imsi != 6))
1926	continue;
1927	mnc_len = sep - cred->imsi - 3;
1928	os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1929	sep++;
1930	msin_len = os_strlen(cred->imsi);
1931	if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1932	msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1933	os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1934	imsi_buf[3 + mnc_len + msin_len] = '\0';
1935	imsi = imsi_buf;
1936
1937	#if defined(PCSC_FUNCS) \|\| defined(CONFIG_EAP_PROXY)
1938	compare:
1939	#endif /* PCSC_FUNCS \|\| CONFIG_EAP_PROXY */
1940	wpa_msg(wpa_s, MSG_DEBUG,
1941	"Interworking: Parsing 3GPP info from " MACSTR,
1942	MAC2STR(bss->bssid));
1943	ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1944	wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound",
1945	ret ? "" : "not ");
1946	if (ret) {
1947	if (cred_no_required_oi_match(cred, bss))
1948	continue;
1949	if (!ignore_bw &&
1950	cred_below_min_backhaul(wpa_s, cred, bss))
1951	continue;
1952	if (!ignore_bw &&
1953	cred_over_max_bss_load(wpa_s, cred, bss))
1954	continue;
1955	if (!ignore_bw &&
1956	cred_conn_capab_missing(wpa_s, cred, bss))
1957	continue;
1958	if (cred_excluded_ssid(cred, bss)) {
1959	if (excluded == NULL)
1960	continue;
1961	if (selected == NULL) {
1962	selected = cred;
1963	is_excluded = 1;
1964	}
1965	} else {
1966	if (selected == NULL \|\| is_excluded \|\|
1967	cred_prio_cmp(selected, cred) < 0) {
1968	selected = cred;
1969	is_excluded = 0;
1970	}
1971	}
1972	}
1973	}
1974
1975	if (excluded)
1976	*excluded = is_excluded;
1977	#endif /* INTERWORKING_3GPP */
1978	return selected;
1979	}
1980
1981
1982	static struct wpa_cred * interworking_credentials_available_realm(
1983	struct wpa_supplicant wpa_s, struct wpa_bss bss, int ignore_bw,
1984	int *excluded)
1985	{
1986	struct wpa_cred cred, selected = NULL;
1987	struct nai_realm *realm;
1988	u16 count, i;
1989	int is_excluded = 0;
1990
1991	if (bss->anqp == NULL \|\| bss->anqp->nai_realm == NULL)
1992	return NULL;
1993
1994	if (wpa_s->conf->cred == NULL)
1995	return NULL;
1996
1997	wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1998	MACSTR, MAC2STR(bss->bssid));
1999	realm = nai_realm_parse(bss->anqp->nai_realm, &count);
2000	if (realm == NULL) {
2001	wpa_msg(wpa_s, MSG_DEBUG,
2002	"Interworking: Could not parse NAI Realm list from "
2003	MACSTR, MAC2STR(bss->bssid));
2004	return NULL;
2005	}
2006
2007	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2008	if (cred->realm == NULL)
2009	continue;
2010
2011	for (i = 0; i < count; i++) {
2012	if (!nai_realm_match(&realm[i], cred->realm))
2013	continue;
2014	if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2015	if (cred_no_required_oi_match(cred, bss))
2016	continue;
2017	if (!ignore_bw &&
2018	cred_below_min_backhaul(wpa_s, cred, bss))
2019	continue;
2020	if (!ignore_bw &&
2021	cred_over_max_bss_load(wpa_s, cred, bss))
2022	continue;
2023	if (!ignore_bw &&
2024	cred_conn_capab_missing(wpa_s, cred, bss))
2025	continue;
2026	if (cred_excluded_ssid(cred, bss)) {
2027	if (excluded == NULL)
2028	continue;
2029	if (selected == NULL) {
2030	selected = cred;
2031	is_excluded = 1;
2032	}
2033	} else {
2034	if (selected == NULL \|\| is_excluded \|\|
2035	cred_prio_cmp(selected, cred) < 0)
2036	{
2037	selected = cred;
2038	is_excluded = 0;
2039	}
2040	}
2041	break;
2042	} else {
2043	wpa_msg(wpa_s, MSG_DEBUG,
2044	"Interworking: realm-find-eap returned false");
2045	}
2046	}
2047	}
2048
2049	nai_realm_free(realm, count);
2050
2051	if (excluded)
2052	*excluded = is_excluded;
2053
2054	return selected;
2055	}
2056
2057
2058	static struct wpa_cred * interworking_credentials_available_helper(
2059	struct wpa_supplicant wpa_s, struct wpa_bss bss, int ignore_bw,
2060	int *excluded)
2061	{
2062	struct wpa_cred cred, cred2;
2063	int excluded1, excluded2 = 0;
2064
2065	if (disallowed_bssid(wpa_s, bss->bssid) \|\|
2066	disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2067	wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2068	MACSTR, MAC2STR(bss->bssid));
2069	return NULL;
2070	}
2071
2072	cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2073	&excluded1);
2074	cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2075	&excluded2);
2076	if (cred && cred2 &&
2077	(cred_prio_cmp(cred2, cred) >= 0 \|\| (!excluded2 && excluded1))) {
2078	cred = cred2;
2079	excluded1 = excluded2;
2080	}
2081	if (!cred) {
2082	cred = cred2;
2083	excluded1 = excluded2;
2084	}
2085
2086	cred2 = interworking_credentials_available_roaming_consortium(
2087	wpa_s, bss, ignore_bw, &excluded2);
2088	if (cred && cred2 &&
2089	(cred_prio_cmp(cred2, cred) >= 0 \|\| (!excluded2 && excluded1))) {
2090	cred = cred2;
2091	excluded1 = excluded2;
2092	}
2093	if (!cred) {
2094	cred = cred2;
2095	excluded1 = excluded2;
2096	}
2097
2098	if (excluded)
2099	*excluded = excluded1;
2100	return cred;
2101	}
2102
2103
2104	static struct wpa_cred * interworking_credentials_available(
2105	struct wpa_supplicant wpa_s, struct wpa_bss bss, int *excluded)
2106	{
2107	struct wpa_cred *cred;
2108
2109	if (excluded)
2110	*excluded = 0;
2111	cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2112	excluded);
2113	if (cred)
2114	return cred;
2115	return interworking_credentials_available_helper(wpa_s, bss, 1,
2116	excluded);
2117	}
2118
2119
2120	int domain_name_list_contains(struct wpabuf *domain_names,
2121	const char *domain, int exact_match)
2122	{
2123	const u8 pos, end;
2124	size_t len;
2125
2126	len = os_strlen(domain);
2127	pos = wpabuf_head(domain_names);
2128	end = pos + wpabuf_len(domain_names);
2129
2130	while (pos + 1 < end) {
2131	if (pos + 1 + pos[0] > end)
2132	break;
2133
2134	wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2135	pos + 1, pos[0]);
2136	if (pos[0] == len &&
2137	os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
2138	return 1;
2139	if (!exact_match && pos[0] > len && pos[pos[0] - len] == '.') {
2140	const char ap = (const char ) (pos + 1);
2141	int offset = pos[0] - len;
2142	if (os_strncasecmp(domain, ap + offset, len) == 0)
2143	return 1;
2144	}
2145
2146	pos += 1 + pos[0];
2147	}
2148
2149	return 0;
2150	}
2151
2152
2153	int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2154	struct wpa_cred *cred,
2155	struct wpabuf *domain_names)
2156	{
2157	size_t i;
2158	int ret = -1;
2159	#ifdef INTERWORKING_3GPP
2160	char nai[100], *realm;
2161
2162	char *imsi = NULL;
2163	int mnc_len = 0;
2164	if (cred->imsi)
2165	imsi = cred->imsi;
2166	#ifdef PCSC_FUNCS
2167	else if (cred->pcsc && wpa_s->scard) {
2168	if (interworking_pcsc_read_imsi(wpa_s) < 0)
2169	return -1;
2170	imsi = wpa_s->imsi;
2171	mnc_len = wpa_s->mnc_len;
2172	}
2173	#endif /* PCSC_FUNCS */
2174	#ifdef CONFIG_EAP_PROXY
2175	else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2176	imsi = wpa_s->imsi;
2177	mnc_len = wpa_s->mnc_len;
2178	}
2179	#endif /* CONFIG_EAP_PROXY */
2180	if (domain_names &&
2181	imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2182	realm = os_strchr(nai, '@');
2183	if (realm)
2184	realm++;
2185	wpa_msg(wpa_s, MSG_DEBUG,
2186	"Interworking: Search for match with SIM/USIM domain %s",
2187	realm);
2188	if (realm &&
2189	domain_name_list_contains(domain_names, realm, 1))
2190	return 1;
2191	if (realm)
2192	ret = 0;
2193	}
2194	#endif /* INTERWORKING_3GPP */
2195
2196	if (domain_names == NULL \|\| cred->domain == NULL)
2197	return ret;
2198
2199	for (i = 0; i < cred->num_domain; i++) {
2200	wpa_msg(wpa_s, MSG_DEBUG,
2201	"Interworking: Search for match with home SP FQDN %s",
2202	cred->domain[i]);
2203	if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2204	return 1;
2205	}
2206
2207	return 0;
2208	}
2209
2210
2211	static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2212	struct wpabuf *domain_names)
2213	{
2214	struct wpa_cred *cred;
2215
2216	if (domain_names == NULL \|\| wpa_s->conf->cred == NULL)
2217	return -1;
2218
2219	for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2220	int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2221	if (res)
2222	return res;
2223	}
2224
2225	return 0;
2226	}
2227
2228
2229	static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2230	{
2231	struct wpa_bss *bss;
2232	struct wpa_ssid *ssid;
2233
2234	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2235	for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2236	if (wpas_network_disabled(wpa_s, ssid) \|\|
2237	ssid->mode != WPAS_MODE_INFRA)
2238	continue;
2239	if (ssid->ssid_len != bss->ssid_len \|\|
2240	os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2241	0)
2242	continue;
2243	/*
2244	* TODO: Consider more accurate matching of security
2245	* configuration similarly to what is done in events.c
2246	*/
2247	return 1;
2248	}
2249	}
2250
2251	return 0;
2252	}
2253
2254
2255	static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2256	struct roaming_partner *partner,
2257	struct wpabuf *domain_names)
2258	{
2259	wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2260	partner->fqdn, partner->exact_match, partner->priority,
2261	partner->country);
2262	wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2263	wpabuf_head(domain_names),
2264	wpabuf_len(domain_names));
2265	if (!domain_name_list_contains(domain_names, partner->fqdn,
2266	partner->exact_match))
2267	return 0;
2268	/* TODO: match Country */
2269	return 1;
2270	}
2271
2272
2273	static u8 roaming_prio(struct wpa_supplicant wpa_s, struct wpa_cred cred,
2274	struct wpa_bss *bss)
2275	{
2276	size_t i;
2277
2278	if (bss->anqp == NULL \|\| bss->anqp->domain_name == NULL) {
2279	wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2280	return 128; /* cannot check preference with domain name */
2281	}
2282
2283	if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2284	{
2285	wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2286	return 0; /* max preference for home SP network */
2287	}
2288
2289	for (i = 0; i < cred->num_roaming_partner; i++) {
2290	if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2291	bss->anqp->domain_name)) {
2292	wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2293	cred->roaming_partner[i].priority);
2294	return cred->roaming_partner[i].priority;
2295	}
2296	}
2297
2298	wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2299	return 128;
2300	}
2301
2302
2303	static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2304	struct wpa_bss *selected,
2305	struct wpa_cred *cred)
2306	{
2307	struct wpa_bss *bss;
2308	u8 best_prio, prio;
2309	struct wpa_cred *cred2;
2310
2311	/*
2312	* Check if any other BSS is operated by a more preferred roaming
2313	* partner.
2314	*/
2315
2316	best_prio = roaming_prio(wpa_s, cred, selected);
2317	wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2318	MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2319	cred->id);
2320
2321	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2322	if (bss == selected)
2323	continue;
2324	cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2325	if (!cred2)
2326	continue;
2327	if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2328	continue;
2329	prio = roaming_prio(wpa_s, cred2, bss);
2330	wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2331	MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2332	cred2->id);
2333	if (prio < best_prio) {
2334	int bh1, bh2, load1, load2, conn1, conn2;
2335	bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2336	load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2337	conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2338	bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2339	load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2340	conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2341	wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d new: %d %d %d",
2342	bh1, load1, conn1, bh2, load2, conn2);
2343	if (bh1 \|\| load1 \|\| conn1 \|\| !(bh2 \|\| load2 \|\| conn2)) {
2344	wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2345	best_prio = prio;
2346	selected = bss;
2347	}
2348	}
2349	}
2350
2351	return selected;
2352	}
2353
2354
2355	static void interworking_select_network(struct wpa_supplicant *wpa_s)
2356	{
2357	struct wpa_bss bss, selected = NULL, *selected_home = NULL;
2358	struct wpa_bss selected2 = NULL, selected2_home = NULL;
2359	unsigned int count = 0;
2360	const char *type;
2361	int res;
2362	struct wpa_cred cred, selected_cred = NULL;
2363	struct wpa_cred *selected_home_cred = NULL;
2364	struct wpa_cred *selected2_cred = NULL;
2365	struct wpa_cred *selected2_home_cred = NULL;
2366
2367	wpa_s->network_select = 0;
2368
2369	wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2370	wpa_s->auto_select);
2371	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2372	int excluded = 0;
2373	int bh, bss_load, conn_capab;
2374	cred = interworking_credentials_available(wpa_s, bss,
2375	&excluded);
2376	if (!cred)
2377	continue;
2378
2379	if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2380	/*
2381	* We currently support only HS 2.0 networks and those
2382	* are required to use WPA2-Enterprise.
2383	*/
2384	wpa_msg(wpa_s, MSG_DEBUG,
2385	"Interworking: Credential match with " MACSTR
2386	" but network does not use RSN",
2387	MAC2STR(bss->bssid));
2388	continue;
2389	}
2390	if (!excluded)
2391	count++;
2392	res = interworking_home_sp(wpa_s, bss->anqp ?
2393	bss->anqp->domain_name : NULL);
2394	if (res > 0)
2395	type = "home";
2396	else if (res == 0)
2397	type = "roaming";
2398	else
2399	type = "unknown";
2400	bh = cred_below_min_backhaul(wpa_s, cred, bss);
2401	bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2402	conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2403	wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2404	excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2405	MAC2STR(bss->bssid), type,
2406	bh ? " below_min_backhaul=1" : "",
2407	bss_load ? " over_max_bss_load=1" : "",
2408	conn_capab ? " conn_capab_missing=1" : "",
2409	cred->id, cred->priority, cred->sp_priority);
2410	if (excluded)
2411	continue;
2412	if (wpa_s->auto_select \|\|
2413	(wpa_s->conf->auto_interworking &&
2414	wpa_s->auto_network_select)) {
2415	if (bh \|\| bss_load \|\| conn_capab) {
2416	if (selected2_cred == NULL \|\|
2417	cred_prio_cmp(cred, selected2_cred) > 0) {
2418	wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2419	selected2 = bss;
2420	selected2_cred = cred;
2421	}
2422	if (res > 0 &&
2423	(selected2_home_cred == NULL \|\|
2424	cred_prio_cmp(cred, selected2_home_cred) >
2425	0)) {
2426	wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2427	selected2_home = bss;
2428	selected2_home_cred = cred;
2429	}
2430	} else {
2431	if (selected_cred == NULL \|\|
2432	cred_prio_cmp(cred, selected_cred) > 0) {
2433	wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2434	selected = bss;
2435	selected_cred = cred;
2436	}
2437	if (res > 0 &&
2438	(selected_home_cred == NULL \|\|
2439	cred_prio_cmp(cred, selected_home_cred) >
2440	0)) {
2441	wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2442	selected_home = bss;
2443	selected_home_cred = cred;
2444	}
2445	}
2446	}
2447	}
2448
2449	if (selected_home && selected_home != selected &&
2450	selected_home_cred &&
2451	(selected_cred == NULL \|\|
2452	cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2453	/* Prefer network operated by the Home SP */
2454	wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2455	selected = selected_home;
2456	selected_cred = selected_home_cred;
2457	}
2458
2459	if (!selected) {
2460	if (selected2_home) {
2461	wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2462	selected = selected2_home;
2463	selected_cred = selected2_home_cred;
2464	} else if (selected2) {
2465	wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2466	selected = selected2;
2467	selected_cred = selected2_cred;
2468	}
2469	}
2470
2471	if (count == 0) {
2472	/*
2473	* No matching network was found based on configured
2474	* credentials. Check whether any of the enabled network blocks
2475	* have matching APs.
2476	*/
2477	if (interworking_find_network_match(wpa_s)) {
2478	wpa_msg(wpa_s, MSG_DEBUG,
2479	"Interworking: Possible BSS match for enabled network configurations");
2480	if (wpa_s->auto_select) {
2481	interworking_reconnect(wpa_s);
2482	return;
2483	}
2484	}
2485
2486	if (wpa_s->auto_network_select) {
2487	wpa_msg(wpa_s, MSG_DEBUG,
2488	"Interworking: Continue scanning after ANQP fetch");
2489	wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2490	0);
2491	return;
2492	}
2493
2494	wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2495	"with matching credentials found");
2496	if (wpa_s->wpa_state == WPA_SCANNING)
2497	wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2498	}
2499
2500	if (selected) {
2501	wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2502	MAC2STR(selected->bssid));
2503	selected = pick_best_roaming_partner(wpa_s, selected,
2504	selected_cred);
2505	wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2506	" (after best roaming partner selection)",
2507	MAC2STR(selected->bssid));
2508	wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2509	MAC2STR(selected->bssid));
2510	interworking_connect(wpa_s, selected, 0);
2511	}
2512	}
2513
2514
2515	static struct wpa_bss_anqp *
2516	interworking_match_anqp_info(struct wpa_supplicant wpa_s, struct wpa_bss bss)
2517	{
2518	struct wpa_bss *other;
2519
2520	if (is_zero_ether_addr(bss->hessid))
2521	return NULL; /* Cannot be in the same homegenous ESS */
2522
2523	dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2524	if (other == bss)
2525	continue;
2526	if (other->anqp == NULL)
2527	continue;
2528	if (other->anqp->roaming_consortium == NULL &&
2529	other->anqp->nai_realm == NULL &&
2530	other->anqp->anqp_3gpp == NULL &&
2531	other->anqp->domain_name == NULL)
2532	continue;
2533	if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2534	continue;
2535	if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2536	continue;
2537	if (bss->ssid_len != other->ssid_len \|\|
2538	os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2539	continue;
2540
2541	wpa_msg(wpa_s, MSG_DEBUG,
2542	"Interworking: Share ANQP data with already fetched BSSID "
2543	MACSTR " and " MACSTR,
2544	MAC2STR(other->bssid), MAC2STR(bss->bssid));
2545	other->anqp->users++;
2546	return other->anqp;
2547	}
2548
2549	return NULL;
2550	}
2551
2552
2553	static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2554	{
2555	struct wpa_bss *bss;
2556	int found = 0;
2557	const u8 *ie;
2558
2559	wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2560	"fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2561	wpa_s->fetch_anqp_in_progress,
2562	wpa_s->fetch_osu_icon_in_progress);
2563
2564	if (eloop_terminated() \|\| !wpa_s->fetch_anqp_in_progress) {
2565	wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2566	return;
2567	}
2568
2569	if (wpa_s->fetch_osu_icon_in_progress) {
2570	wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2571	hs20_next_osu_icon(wpa_s);
2572	return;
2573	}
2574
2575	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2576	if (!(bss->caps & IEEE80211_CAP_ESS))
2577	continue;
2578	ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
2579	if (ie == NULL \|\| ie[1] < 4 \|\| !(ie[5] & 0x80))
2580	continue; /* AP does not support Interworking */
2581	if (disallowed_bssid(wpa_s, bss->bssid) \|\|
2582	disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2583	continue; /* Disallowed BSS */
2584
2585	if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2586	if (bss->anqp == NULL) {
2587	bss->anqp = interworking_match_anqp_info(wpa_s,
2588	bss);
2589	if (bss->anqp) {
2590	/* Shared data already fetched */
2591	continue;
2592	}
2593	bss->anqp = wpa_bss_anqp_alloc();
2594	if (bss->anqp == NULL)
2595	break;
2596	}
2597	found++;
2598	bss->flags \|= WPA_BSS_ANQP_FETCH_TRIED;
2599	wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2600	MACSTR, MAC2STR(bss->bssid));
2601	interworking_anqp_send_req(wpa_s, bss);
2602	break;
2603	}
2604	}
2605
2606	if (found == 0) {
2607	if (wpa_s->fetch_osu_info) {
2608	if (wpa_s->num_prov_found == 0 &&
2609	wpa_s->fetch_osu_waiting_scan &&
2610	wpa_s->num_osu_scans < 3) {
2611	wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2612	hs20_start_osu_scan(wpa_s);
2613	return;
2614	}
2615	wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2616	hs20_osu_icon_fetch(wpa_s);
2617	return;
2618	}
2619	wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2620	wpa_s->fetch_anqp_in_progress = 0;
2621	if (wpa_s->network_select)
2622	interworking_select_network(wpa_s);
2623	}
2624	}
2625
2626
2627	void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2628	{
2629	struct wpa_bss *bss;
2630
2631	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2632	bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2633
2634	wpa_s->fetch_anqp_in_progress = 1;
2635
2636	/*
2637	* Start actual ANQP operation from eloop call to make sure the loop
2638	* does not end up using excessive recursion.
2639	*/
2640	eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2641	}
2642
2643
2644	int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2645	{
2646	if (wpa_s->fetch_anqp_in_progress \|\| wpa_s->network_select)
2647	return 0;
2648
2649	wpa_s->network_select = 0;
2650	wpa_s->fetch_all_anqp = 1;
2651	wpa_s->fetch_osu_info = 0;
2652
2653	interworking_start_fetch_anqp(wpa_s);
2654
2655	return 0;
2656	}
2657
2658
2659	void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2660	{
2661	if (!wpa_s->fetch_anqp_in_progress)
2662	return;
2663
2664	wpa_s->fetch_anqp_in_progress = 0;
2665	}
2666
2667
2668	int anqp_send_req(struct wpa_supplicant wpa_s, const u8 dst,
2669	u16 info_ids[], size_t num_ids, u32 subtypes)
2670	{
2671	struct wpabuf *buf;
2672	struct wpabuf *hs20_buf = NULL;
2673	int ret = 0;
2674	int freq;
2675	struct wpa_bss *bss;
2676	int res;
2677
2678	bss = wpa_bss_get_bssid(wpa_s, dst);
2679	if (!bss) {
2680	wpa_printf(MSG_WARNING,
2681	"ANQP: Cannot send query to unknown BSS "
2682	MACSTR, MAC2STR(dst));
2683	return -1;
2684	}
2685
2686	wpa_bss_anqp_unshare_alloc(bss);
2687	freq = bss->freq;
2688
2689	wpa_msg(wpa_s, MSG_DEBUG,
2690	"ANQP: Query Request to " MACSTR " for %u id(s)",
2691	MAC2STR(dst), (unsigned int) num_ids);
2692
2693	#ifdef CONFIG_HS20
2694	if (subtypes != 0) {
2695	hs20_buf = wpabuf_alloc(100);
2696	if (hs20_buf == NULL)
2697	return -1;
2698	hs20_put_anqp_req(subtypes, NULL, 0, hs20_buf);
2699	}
2700	#endif /* CONFIG_HS20 */
2701
2702	buf = anqp_build_req(info_ids, num_ids, hs20_buf);
2703	wpabuf_free(hs20_buf);
2704	if (buf == NULL)
2705	return -1;
2706
2707	res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
2708	if (res < 0) {
2709	wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
2710	wpabuf_free(buf);
2711	ret = -1;
2712	} else {
2713	wpa_msg(wpa_s, MSG_DEBUG,
2714	"ANQP: Query started with dialog token %u", res);
2715	}
2716
2717	return ret;
2718	}
2719
2720
2721	static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2722	struct wpa_bss bss, const u8 sa,
2723	u16 info_id,
2724	const u8 *data, size_t slen)
2725	{
2726	const u8 *pos = data;
2727	struct wpa_bss_anqp *anqp = NULL;
2728	#ifdef CONFIG_HS20
2729	u8 type;
2730	#endif /* CONFIG_HS20 */
2731
2732	if (bss)
2733	anqp = bss->anqp;
2734
2735	switch (info_id) {
2736	case ANQP_CAPABILITY_LIST:
2737	wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2738	" ANQP Capability list", MAC2STR(sa));
2739	wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list",
2740	pos, slen);
2741	if (anqp) {
2742	wpabuf_free(anqp->capability_list);
2743	anqp->capability_list = wpabuf_alloc_copy(pos, slen);
2744	}
2745	break;
2746	case ANQP_VENUE_NAME:
2747	wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2748	" Venue Name", MAC2STR(sa));
2749	wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2750	if (anqp) {
2751	wpabuf_free(anqp->venue_name);
2752	anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2753	}
2754	break;
2755	case ANQP_NETWORK_AUTH_TYPE:
2756	wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2757	" Network Authentication Type information",
2758	MAC2STR(sa));
2759	wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2760	"Type", pos, slen);
2761	if (anqp) {
2762	wpabuf_free(anqp->network_auth_type);
2763	anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2764	}
2765	break;
2766	case ANQP_ROAMING_CONSORTIUM:
2767	wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2768	" Roaming Consortium list", MAC2STR(sa));
2769	wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2770	pos, slen);
2771	if (anqp) {
2772	wpabuf_free(anqp->roaming_consortium);
2773	anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2774	}
2775	break;
2776	case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2777	wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2778	" IP Address Type Availability information",
2779	MAC2STR(sa));
2780	wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2781	pos, slen);
2782	if (anqp) {
2783	wpabuf_free(anqp->ip_addr_type_availability);
2784	anqp->ip_addr_type_availability =
2785	wpabuf_alloc_copy(pos, slen);
2786	}
2787	break;
2788	case ANQP_NAI_REALM:
2789	wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2790	" NAI Realm list", MAC2STR(sa));
2791	wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2792	if (anqp) {
2793	wpabuf_free(anqp->nai_realm);
2794	anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2795	}
2796	break;
2797	case ANQP_3GPP_CELLULAR_NETWORK:
2798	wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2799	" 3GPP Cellular Network information", MAC2STR(sa));
2800	wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2801	pos, slen);
2802	if (anqp) {
2803	wpabuf_free(anqp->anqp_3gpp);
2804	anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2805	}
2806	break;
2807	case ANQP_DOMAIN_NAME:
2808	wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2809	" Domain Name list", MAC2STR(sa));
2810	wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2811	if (anqp) {
2812	wpabuf_free(anqp->domain_name);
2813	anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2814	}
2815	break;
2816	case ANQP_VENDOR_SPECIFIC:
2817	if (slen < 3)
2818	return;
2819
2820	switch (WPA_GET_BE24(pos)) {
2821	#ifdef CONFIG_HS20
2822	case OUI_WFA:
2823	pos += 3;
2824	slen -= 3;
2825
2826	if (slen < 1)
2827	return;
2828	type = *pos++;
2829	slen--;
2830
2831	switch (type) {
2832	case HS20_ANQP_OUI_TYPE:
2833	hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
2834	pos, slen);
2835	break;
2836	default:
2837	wpa_msg(wpa_s, MSG_DEBUG,
2838	"HS20: Unsupported ANQP vendor type %u",
2839	type);
2840	break;
2841	}
2842	break;
2843	#endif /* CONFIG_HS20 */
2844	default:
2845	wpa_msg(wpa_s, MSG_DEBUG,
2846	"Interworking: Unsupported vendor-specific ANQP OUI %06x",
2847	WPA_GET_BE24(pos));
2848	return;
2849	}
2850	break;
2851	default:
2852	wpa_msg(wpa_s, MSG_DEBUG,
2853	"Interworking: Unsupported ANQP Info ID %u", info_id);
2854	break;
2855	}
2856	}
2857
2858
2859	void anqp_resp_cb(void ctx, const u8 dst, u8 dialog_token,
2860	enum gas_query_result result,
2861	const struct wpabuf *adv_proto,
2862	const struct wpabuf *resp, u16 status_code)
2863	{
2864	struct wpa_supplicant *wpa_s = ctx;
2865	const u8 *pos;
2866	const u8 *end;
2867	u16 info_id;
2868	u16 slen;
2869	struct wpa_bss bss = NULL, tmp;
2870	const char *anqp_result = "SUCCESS";
2871
2872	wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
2873	" dialog_token=%u result=%d status_code=%u",
2874	MAC2STR(dst), dialog_token, result, status_code);
2875	if (result != GAS_QUERY_SUCCESS) {
2876	if (wpa_s->fetch_osu_icon_in_progress)
2877	hs20_icon_fetch_failed(wpa_s);
2878	anqp_result = "FAILURE";
2879	goto out;
2880	}
2881
2882	pos = wpabuf_head(adv_proto);
2883	if (wpabuf_len(adv_proto) < 4 \|\| pos[0] != WLAN_EID_ADV_PROTO \|\|
2884	pos[1] < 2 \|\| pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2885	wpa_msg(wpa_s, MSG_DEBUG,
2886	"ANQP: Unexpected Advertisement Protocol in response");
2887	if (wpa_s->fetch_osu_icon_in_progress)
2888	hs20_icon_fetch_failed(wpa_s);
2889	anqp_result = "INVALID_FRAME";
2890	goto out;
2891	}
2892
2893	/*
2894	* If possible, select the BSS entry based on which BSS entry was used
2895	* for the request. This can help in cases where multiple BSS entries
2896	* may exist for the same AP.
2897	*/
2898	dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2899	if (tmp == wpa_s->interworking_gas_bss &&
2900	os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2901	bss = tmp;
2902	break;
2903	}
2904	}
2905	if (bss == NULL)
2906	bss = wpa_bss_get_bssid(wpa_s, dst);
2907
2908	pos = wpabuf_head(resp);
2909	end = pos + wpabuf_len(resp);
2910
2911	while (pos < end) {
2912	unsigned int left = end - pos;
2913
2914	if (left < 4) {
2915	wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element");
2916	anqp_result = "INVALID_FRAME";
2917	goto out_parse_done;
2918	}
2919	info_id = WPA_GET_LE16(pos);
2920	pos += 2;
2921	slen = WPA_GET_LE16(pos);
2922	pos += 2;
2923	left -= 4;
2924	if (left < slen) {
2925	wpa_msg(wpa_s, MSG_DEBUG,
2926	"ANQP: Invalid element length for Info ID %u",
2927	info_id);
2928	anqp_result = "INVALID_FRAME";
2929	goto out_parse_done;
2930	}
2931	interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
2932	slen);
2933	pos += slen;
2934	}
2935
2936	out_parse_done:
2937	hs20_notify_parse_done(wpa_s);
2938	out:
2939	wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
2940	MAC2STR(dst), anqp_result);
2941	}
2942
2943
2944	static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
2945	struct wpa_scan_results *scan_res)
2946	{
2947	wpa_msg(wpa_s, MSG_DEBUG,
2948	"Interworking: Scan results available - start ANQP fetch");
2949	interworking_start_fetch_anqp(wpa_s);
2950	}
2951
2952
2953	int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
2954	int *freqs)
2955	{
2956	interworking_stop_fetch_anqp(wpa_s);
2957	wpa_s->network_select = 1;
2958	wpa_s->auto_network_select = 0;
2959	wpa_s->auto_select = !!auto_select;
2960	wpa_s->fetch_all_anqp = 0;
2961	wpa_s->fetch_osu_info = 0;
2962	wpa_msg(wpa_s, MSG_DEBUG,
2963	"Interworking: Start scan for network selection");
2964	wpa_s->scan_res_handler = interworking_scan_res_handler;
2965	wpa_s->normal_scans = 0;
2966	wpa_s->scan_req = MANUAL_SCAN_REQ;
2967	os_free(wpa_s->manual_scan_freqs);
2968	wpa_s->manual_scan_freqs = freqs;
2969	wpa_s->after_wps = 0;
2970	wpa_s->known_wps_freq = 0;
2971	wpa_supplicant_req_scan(wpa_s, 0, 0);
2972
2973	return 0;
2974	}
2975
2976
2977	static void gas_resp_cb(void ctx, const u8 addr, u8 dialog_token,
2978	enum gas_query_result result,
2979	const struct wpabuf *adv_proto,
2980	const struct wpabuf *resp, u16 status_code)
2981	{
2982	struct wpa_supplicant *wpa_s = ctx;
2983	struct wpabuf *n;
2984
2985	wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2986	" dialog_token=%d status_code=%d resp_len=%d",
2987	MAC2STR(addr), dialog_token, status_code,
2988	resp ? (int) wpabuf_len(resp) : -1);
2989	if (!resp)
2990	return;
2991
2992	n = wpabuf_dup(resp);
2993	if (n == NULL)
2994	return;
2995	wpabuf_free(wpa_s->prev_gas_resp);
2996	wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
2997	os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
2998	wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
2999	wpa_s->last_gas_resp = n;
3000	os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
3001	wpa_s->last_gas_dialog_token = dialog_token;
3002	}
3003
3004
3005	int gas_send_request(struct wpa_supplicant wpa_s, const u8 dst,
3006	const struct wpabuf *adv_proto,
3007	const struct wpabuf *query)
3008	{
3009	struct wpabuf *buf;
3010	int ret = 0;
3011	int freq;
3012	struct wpa_bss *bss;
3013	int res;
3014	size_t len;
3015	u8 query_resp_len_limit = 0;
3016
3017	freq = wpa_s->assoc_freq;
3018	bss = wpa_bss_get_bssid(wpa_s, dst);
3019	if (bss)
3020	freq = bss->freq;
3021	if (freq <= 0)
3022	return -1;
3023
3024	wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
3025	MAC2STR(dst), freq);
3026	wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
3027	wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
3028
3029	len = 3 + wpabuf_len(adv_proto) + 2;
3030	if (query)
3031	len += wpabuf_len(query);
3032	buf = gas_build_initial_req(0, len);
3033	if (buf == NULL)
3034	return -1;
3035
3036	/* Advertisement Protocol IE */
3037	wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3038	wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3039	wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3040	wpabuf_put_buf(buf, adv_proto);
3041
3042	/* GAS Query */
3043	if (query) {
3044	wpabuf_put_le16(buf, wpabuf_len(query));
3045	wpabuf_put_buf(buf, query);
3046	} else
3047	wpabuf_put_le16(buf, 0);
3048
3049	res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
3050	if (res < 0) {
3051	wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
3052	wpabuf_free(buf);
3053	ret = -1;
3054	} else
3055	wpa_msg(wpa_s, MSG_DEBUG,
3056	"GAS: Query started with dialog token %u", res);
3057
3058	return ret;
3059	}

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