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Interworking: Combine identical error returns into a single one
[thirdparty/hostap.git] / wpa_supplicant / interworking.c
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 static int interworking_connect_helper(struct wpa_supplicant *wpa_s,
1592 struct wpa_bss *bss, int allow_excluded,
1593 int only_add)
1594 {
1595 struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1596 struct wpa_ssid *ssid;
1597 struct nai_realm *realm;
1598 struct nai_realm_eap *eap = NULL;
1599 u16 count, i;
1600 char buf[100];
1601 int excluded = 0, *excl = allow_excluded ? &excluded : NULL;
1602 const char *name;
1603
1604 if (wpa_s->conf->cred == NULL || bss == NULL)
1605 return -1;
1606 if (disallowed_bssid(wpa_s, bss->bssid) ||
1607 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1608 wpa_msg(wpa_s, MSG_DEBUG,
1609 "Interworking: Reject connection to disallowed BSS "
1610 MACSTR, MAC2STR(bss->bssid));
1611 return -1;
1612 }
1613
1614 wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1615 " for connection (allow_excluded=%d)",
1616 MAC2STR(bss->bssid), allow_excluded);
1617
1618 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1619 /*
1620 * We currently support only HS 2.0 networks and those are
1621 * required to use WPA2-Enterprise.
1622 */
1623 wpa_msg(wpa_s, MSG_DEBUG,
1624 "Interworking: Network does not use RSN");
1625 return -1;
1626 }
1627
1628 cred_rc = interworking_credentials_available_roaming_consortium(
1629 wpa_s, bss, 0, excl);
1630 if (cred_rc) {
1631 wpa_msg(wpa_s, MSG_DEBUG,
1632 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d",
1633 cred_rc->priority, cred_rc->sp_priority);
1634 if (allow_excluded && excl && !(*excl))
1635 excl = NULL;
1636 }
1637
1638 cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1639 if (cred) {
1640 wpa_msg(wpa_s, MSG_DEBUG,
1641 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d",
1642 cred->priority, cred->sp_priority);
1643 if (allow_excluded && excl && !(*excl))
1644 excl = NULL;
1645 }
1646
1647 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1648 excl);
1649 if (cred_3gpp) {
1650 wpa_msg(wpa_s, MSG_DEBUG,
1651 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d",
1652 cred_3gpp->priority, cred_3gpp->sp_priority);
1653 if (allow_excluded && excl && !(*excl))
1654 excl = NULL;
1655 }
1656
1657 if (!cred_rc && !cred && !cred_3gpp) {
1658 wpa_msg(wpa_s, MSG_DEBUG,
1659 "Interworking: No full credential matches - consider options without BW(etc.) limits");
1660 cred_rc = interworking_credentials_available_roaming_consortium(
1661 wpa_s, bss, 1, excl);
1662 if (cred_rc) {
1663 wpa_msg(wpa_s, MSG_DEBUG,
1664 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)",
1665 cred_rc->priority, cred_rc->sp_priority);
1666 if (allow_excluded && excl && !(*excl))
1667 excl = NULL;
1668 }
1669
1670 cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1671 excl);
1672 if (cred) {
1673 wpa_msg(wpa_s, MSG_DEBUG,
1674 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)",
1675 cred->priority, cred->sp_priority);
1676 if (allow_excluded && excl && !(*excl))
1677 excl = NULL;
1678 }
1679
1680 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1681 1, excl);
1682 if (cred_3gpp) {
1683 wpa_msg(wpa_s, MSG_DEBUG,
1684 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)",
1685 cred_3gpp->priority, cred_3gpp->sp_priority);
1686 if (allow_excluded && excl && !(*excl))
1687 excl = NULL;
1688 }
1689 }
1690
1691 if (cred_rc &&
1692 (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1693 (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1694 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1695 bss, only_add);
1696
1697 if (cred_3gpp &&
1698 (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1699 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss,
1700 only_add);
1701 }
1702
1703 if (cred == NULL) {
1704 wpa_msg(wpa_s, MSG_DEBUG,
1705 "Interworking: No matching credentials found for "
1706 MACSTR, MAC2STR(bss->bssid));
1707 return -1;
1708 }
1709
1710 realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1711 &count);
1712 if (realm == NULL) {
1713 wpa_msg(wpa_s, MSG_DEBUG,
1714 "Interworking: Could not parse NAI Realm list from "
1715 MACSTR, MAC2STR(bss->bssid));
1716 return -1;
1717 }
1718
1719 for (i = 0; i < count; i++) {
1720 if (!nai_realm_match(&realm[i], cred->realm))
1721 continue;
1722 eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1723 if (eap)
1724 break;
1725 }
1726
1727 if (!eap) {
1728 wpa_msg(wpa_s, MSG_DEBUG,
1729 "Interworking: No matching credentials and EAP method found for "
1730 MACSTR, MAC2STR(bss->bssid));
1731 nai_realm_free(realm, count);
1732 return -1;
1733 }
1734
1735 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR,
1736 MAC2STR(bss->bssid));
1737
1738 if (already_connected(wpa_s, cred, bss)) {
1739 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1740 MAC2STR(bss->bssid));
1741 nai_realm_free(realm, count);
1742 return 0;
1743 }
1744
1745 remove_duplicate_network(wpa_s, cred, bss);
1746
1747 ssid = wpa_config_add_network(wpa_s->conf);
1748 if (ssid == NULL) {
1749 nai_realm_free(realm, count);
1750 return -1;
1751 }
1752 ssid->parent_cred = cred;
1753 wpas_notify_network_added(wpa_s, ssid);
1754 wpa_config_set_network_defaults(ssid);
1755 ssid->priority = cred->priority;
1756 ssid->temporary = 1;
1757 ssid->ssid = os_zalloc(bss->ssid_len + 1);
1758 if (ssid->ssid == NULL)
1759 goto fail;
1760 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1761 ssid->ssid_len = bss->ssid_len;
1762
1763 if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1764 goto fail;
1765
1766 if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1767 eap->method), 0) < 0)
1768 goto fail;
1769
1770 switch (eap->method) {
1771 case EAP_TYPE_TTLS:
1772 if (eap->inner_method) {
1773 os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1774 eap_get_name(EAP_VENDOR_IETF,
1775 eap->inner_method));
1776 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1777 goto fail;
1778 break;
1779 }
1780 switch (eap->inner_non_eap) {
1781 case NAI_REALM_INNER_NON_EAP_PAP:
1782 if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1783 0)
1784 goto fail;
1785 break;
1786 case NAI_REALM_INNER_NON_EAP_CHAP:
1787 if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1788 < 0)
1789 goto fail;
1790 break;
1791 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1792 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1793 0) < 0)
1794 goto fail;
1795 break;
1796 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1797 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1798 0) < 0)
1799 goto fail;
1800 break;
1801 default:
1802 /* EAP params were not set - assume TTLS/MSCHAPv2 */
1803 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1804 0) < 0)
1805 goto fail;
1806 break;
1807 }
1808 break;
1809 case EAP_TYPE_PEAP:
1810 case EAP_TYPE_FAST:
1811 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1812 0) < 0)
1813 goto fail;
1814 if (wpa_config_set(ssid, "pac_file",
1815 "\"blob://pac_interworking\"", 0) < 0)
1816 goto fail;
1817 name = eap_get_name(EAP_VENDOR_IETF,
1818 eap->inner_method ? eap->inner_method :
1819 EAP_TYPE_MSCHAPV2);
1820 if (name == NULL)
1821 goto fail;
1822 os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1823 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1824 goto fail;
1825 break;
1826 case EAP_TYPE_TLS:
1827 break;
1828 }
1829
1830 if (interworking_set_eap_params(ssid, cred,
1831 eap->method == EAP_TYPE_TTLS) < 0)
1832 goto fail;
1833
1834 nai_realm_free(realm, count);
1835
1836 wpa_s->next_ssid = ssid;
1837 wpa_config_update_prio_list(wpa_s->conf);
1838 if (!only_add)
1839 interworking_reconnect(wpa_s);
1840
1841 return ssid->id;
1842
1843 fail:
1844 wpas_notify_network_removed(wpa_s, ssid);
1845 wpa_config_remove_network(wpa_s->conf, ssid->id);
1846 nai_realm_free(realm, count);
1847 return -1;
1848 }
1849
1850
1851 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
1852 int only_add)
1853 {
1854 return interworking_connect_helper(wpa_s, bss, 1, only_add);
1855 }
1856
1857
1858 #ifdef PCSC_FUNCS
1859 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1860 {
1861 size_t len;
1862
1863 if (wpa_s->imsi[0] && wpa_s->mnc_len)
1864 return 0;
1865
1866 len = sizeof(wpa_s->imsi) - 1;
1867 if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1868 scard_deinit(wpa_s->scard);
1869 wpa_s->scard = NULL;
1870 wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1871 return -1;
1872 }
1873 wpa_s->imsi[len] = '\0';
1874 wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1875 wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1876 wpa_s->imsi, wpa_s->mnc_len);
1877
1878 return 0;
1879 }
1880 #endif /* PCSC_FUNCS */
1881
1882
1883 static struct wpa_cred * interworking_credentials_available_3gpp(
1884 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1885 int *excluded)
1886 {
1887 struct wpa_cred *selected = NULL;
1888 #ifdef INTERWORKING_3GPP
1889 struct wpa_cred *cred;
1890 int ret;
1891 int is_excluded = 0;
1892
1893 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) {
1894 wpa_msg(wpa_s, MSG_DEBUG,
1895 "interworking-avail-3gpp: not avail, anqp: %p anqp_3gpp: %p",
1896 bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
1897 return NULL;
1898 }
1899
1900 #ifdef CONFIG_EAP_PROXY
1901 if (!wpa_s->imsi[0]) {
1902 size_t len;
1903 wpa_msg(wpa_s, MSG_DEBUG,
1904 "Interworking: IMSI not available - try to read again through eap_proxy");
1905 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1906 wpa_s->imsi,
1907 &len);
1908 if (wpa_s->mnc_len > 0) {
1909 wpa_s->imsi[len] = '\0';
1910 wpa_msg(wpa_s, MSG_DEBUG,
1911 "eap_proxy: IMSI %s (MNC length %d)",
1912 wpa_s->imsi, wpa_s->mnc_len);
1913 } else {
1914 wpa_msg(wpa_s, MSG_DEBUG,
1915 "eap_proxy: IMSI not available");
1916 }
1917 }
1918 #endif /* CONFIG_EAP_PROXY */
1919
1920 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1921 char *sep;
1922 const char *imsi;
1923 int mnc_len;
1924 char imsi_buf[16];
1925 size_t msin_len;
1926
1927 #ifdef PCSC_FUNCS
1928 if (cred->pcsc && wpa_s->scard) {
1929 if (interworking_pcsc_read_imsi(wpa_s) < 0)
1930 continue;
1931 imsi = wpa_s->imsi;
1932 mnc_len = wpa_s->mnc_len;
1933 goto compare;
1934 }
1935 #endif /* PCSC_FUNCS */
1936 #ifdef CONFIG_EAP_PROXY
1937 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1938 imsi = wpa_s->imsi;
1939 mnc_len = wpa_s->mnc_len;
1940 goto compare;
1941 }
1942 #endif /* CONFIG_EAP_PROXY */
1943
1944 if (cred->imsi == NULL || !cred->imsi[0] ||
1945 (!wpa_s->conf->external_sim &&
1946 (cred->milenage == NULL || !cred->milenage[0])))
1947 continue;
1948
1949 sep = os_strchr(cred->imsi, '-');
1950 if (sep == NULL ||
1951 (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1952 continue;
1953 mnc_len = sep - cred->imsi - 3;
1954 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1955 sep++;
1956 msin_len = os_strlen(cred->imsi);
1957 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1958 msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1959 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1960 imsi_buf[3 + mnc_len + msin_len] = '\0';
1961 imsi = imsi_buf;
1962
1963 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1964 compare:
1965 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1966 wpa_msg(wpa_s, MSG_DEBUG,
1967 "Interworking: Parsing 3GPP info from " MACSTR,
1968 MAC2STR(bss->bssid));
1969 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1970 wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound",
1971 ret ? "" : "not ");
1972 if (ret) {
1973 if (cred_no_required_oi_match(cred, bss))
1974 continue;
1975 if (!ignore_bw &&
1976 cred_below_min_backhaul(wpa_s, cred, bss))
1977 continue;
1978 if (!ignore_bw &&
1979 cred_over_max_bss_load(wpa_s, cred, bss))
1980 continue;
1981 if (!ignore_bw &&
1982 cred_conn_capab_missing(wpa_s, cred, bss))
1983 continue;
1984 if (cred_excluded_ssid(cred, bss)) {
1985 if (excluded == NULL)
1986 continue;
1987 if (selected == NULL) {
1988 selected = cred;
1989 is_excluded = 1;
1990 }
1991 } else {
1992 if (selected == NULL || is_excluded ||
1993 cred_prio_cmp(selected, cred) < 0) {
1994 selected = cred;
1995 is_excluded = 0;
1996 }
1997 }
1998 }
1999 }
2000
2001 if (excluded)
2002 *excluded = is_excluded;
2003 #endif /* INTERWORKING_3GPP */
2004 return selected;
2005 }
2006
2007
2008 static struct wpa_cred * interworking_credentials_available_realm(
2009 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2010 int *excluded)
2011 {
2012 struct wpa_cred *cred, *selected = NULL;
2013 struct nai_realm *realm;
2014 u16 count, i;
2015 int is_excluded = 0;
2016
2017 if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
2018 return NULL;
2019
2020 if (wpa_s->conf->cred == NULL)
2021 return NULL;
2022
2023 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
2024 MACSTR, MAC2STR(bss->bssid));
2025 realm = nai_realm_parse(bss->anqp->nai_realm, &count);
2026 if (realm == NULL) {
2027 wpa_msg(wpa_s, MSG_DEBUG,
2028 "Interworking: Could not parse NAI Realm list from "
2029 MACSTR, MAC2STR(bss->bssid));
2030 return NULL;
2031 }
2032
2033 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2034 if (cred->realm == NULL)
2035 continue;
2036
2037 for (i = 0; i < count; i++) {
2038 if (!nai_realm_match(&realm[i], cred->realm))
2039 continue;
2040 if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2041 if (cred_no_required_oi_match(cred, bss))
2042 continue;
2043 if (!ignore_bw &&
2044 cred_below_min_backhaul(wpa_s, cred, bss))
2045 continue;
2046 if (!ignore_bw &&
2047 cred_over_max_bss_load(wpa_s, cred, bss))
2048 continue;
2049 if (!ignore_bw &&
2050 cred_conn_capab_missing(wpa_s, cred, bss))
2051 continue;
2052 if (cred_excluded_ssid(cred, bss)) {
2053 if (excluded == NULL)
2054 continue;
2055 if (selected == NULL) {
2056 selected = cred;
2057 is_excluded = 1;
2058 }
2059 } else {
2060 if (selected == NULL || is_excluded ||
2061 cred_prio_cmp(selected, cred) < 0)
2062 {
2063 selected = cred;
2064 is_excluded = 0;
2065 }
2066 }
2067 break;
2068 } else {
2069 wpa_msg(wpa_s, MSG_DEBUG,
2070 "Interworking: realm-find-eap returned false");
2071 }
2072 }
2073 }
2074
2075 nai_realm_free(realm, count);
2076
2077 if (excluded)
2078 *excluded = is_excluded;
2079
2080 return selected;
2081 }
2082
2083
2084 static struct wpa_cred * interworking_credentials_available_helper(
2085 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2086 int *excluded)
2087 {
2088 struct wpa_cred *cred, *cred2;
2089 int excluded1, excluded2 = 0;
2090
2091 if (disallowed_bssid(wpa_s, bss->bssid) ||
2092 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2093 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2094 MACSTR, MAC2STR(bss->bssid));
2095 return NULL;
2096 }
2097
2098 cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2099 &excluded1);
2100 cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2101 &excluded2);
2102 if (cred && cred2 &&
2103 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2104 cred = cred2;
2105 excluded1 = excluded2;
2106 }
2107 if (!cred) {
2108 cred = cred2;
2109 excluded1 = excluded2;
2110 }
2111
2112 cred2 = interworking_credentials_available_roaming_consortium(
2113 wpa_s, bss, ignore_bw, &excluded2);
2114 if (cred && cred2 &&
2115 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2116 cred = cred2;
2117 excluded1 = excluded2;
2118 }
2119 if (!cred) {
2120 cred = cred2;
2121 excluded1 = excluded2;
2122 }
2123
2124 if (excluded)
2125 *excluded = excluded1;
2126 return cred;
2127 }
2128
2129
2130 static struct wpa_cred * interworking_credentials_available(
2131 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
2132 {
2133 struct wpa_cred *cred;
2134
2135 if (excluded)
2136 *excluded = 0;
2137 cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2138 excluded);
2139 if (cred)
2140 return cred;
2141 return interworking_credentials_available_helper(wpa_s, bss, 1,
2142 excluded);
2143 }
2144
2145
2146 int domain_name_list_contains(struct wpabuf *domain_names,
2147 const char *domain, int exact_match)
2148 {
2149 const u8 *pos, *end;
2150 size_t len;
2151
2152 len = os_strlen(domain);
2153 pos = wpabuf_head(domain_names);
2154 end = pos + wpabuf_len(domain_names);
2155
2156 while (end - pos > 1) {
2157 u8 elen;
2158
2159 elen = *pos++;
2160 if (elen > end - pos)
2161 break;
2162
2163 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2164 pos, elen);
2165 if (elen == len &&
2166 os_strncasecmp(domain, (const char *) pos, len) == 0)
2167 return 1;
2168 if (!exact_match && elen > len && pos[elen - len - 1] == '.') {
2169 const char *ap = (const char *) pos;
2170 int offset = elen - len;
2171
2172 if (os_strncasecmp(domain, ap + offset, len) == 0)
2173 return 1;
2174 }
2175
2176 pos += elen;
2177 }
2178
2179 return 0;
2180 }
2181
2182
2183 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2184 struct wpa_cred *cred,
2185 struct wpabuf *domain_names)
2186 {
2187 size_t i;
2188 int ret = -1;
2189 #ifdef INTERWORKING_3GPP
2190 char nai[100], *realm;
2191
2192 char *imsi = NULL;
2193 int mnc_len = 0;
2194 if (cred->imsi)
2195 imsi = cred->imsi;
2196 #ifdef PCSC_FUNCS
2197 else if (cred->pcsc && wpa_s->scard) {
2198 if (interworking_pcsc_read_imsi(wpa_s) < 0)
2199 return -1;
2200 imsi = wpa_s->imsi;
2201 mnc_len = wpa_s->mnc_len;
2202 }
2203 #endif /* PCSC_FUNCS */
2204 #ifdef CONFIG_EAP_PROXY
2205 else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2206 imsi = wpa_s->imsi;
2207 mnc_len = wpa_s->mnc_len;
2208 }
2209 #endif /* CONFIG_EAP_PROXY */
2210 if (domain_names &&
2211 imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2212 realm = os_strchr(nai, '@');
2213 if (realm)
2214 realm++;
2215 wpa_msg(wpa_s, MSG_DEBUG,
2216 "Interworking: Search for match with SIM/USIM domain %s",
2217 realm);
2218 if (realm &&
2219 domain_name_list_contains(domain_names, realm, 1))
2220 return 1;
2221 if (realm)
2222 ret = 0;
2223 }
2224 #endif /* INTERWORKING_3GPP */
2225
2226 if (domain_names == NULL || cred->domain == NULL)
2227 return ret;
2228
2229 for (i = 0; i < cred->num_domain; i++) {
2230 wpa_msg(wpa_s, MSG_DEBUG,
2231 "Interworking: Search for match with home SP FQDN %s",
2232 cred->domain[i]);
2233 if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2234 return 1;
2235 }
2236
2237 return 0;
2238 }
2239
2240
2241 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2242 struct wpabuf *domain_names)
2243 {
2244 struct wpa_cred *cred;
2245
2246 if (domain_names == NULL || wpa_s->conf->cred == NULL)
2247 return -1;
2248
2249 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2250 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2251 if (res)
2252 return res;
2253 }
2254
2255 return 0;
2256 }
2257
2258
2259 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2260 {
2261 struct wpa_bss *bss;
2262 struct wpa_ssid *ssid;
2263
2264 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2265 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2266 if (wpas_network_disabled(wpa_s, ssid) ||
2267 ssid->mode != WPAS_MODE_INFRA)
2268 continue;
2269 if (ssid->ssid_len != bss->ssid_len ||
2270 os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2271 0)
2272 continue;
2273 /*
2274 * TODO: Consider more accurate matching of security
2275 * configuration similarly to what is done in events.c
2276 */
2277 return 1;
2278 }
2279 }
2280
2281 return 0;
2282 }
2283
2284
2285 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2286 struct roaming_partner *partner,
2287 struct wpabuf *domain_names)
2288 {
2289 wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2290 partner->fqdn, partner->exact_match, partner->priority,
2291 partner->country);
2292 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2293 wpabuf_head(domain_names),
2294 wpabuf_len(domain_names));
2295 if (!domain_name_list_contains(domain_names, partner->fqdn,
2296 partner->exact_match))
2297 return 0;
2298 /* TODO: match Country */
2299 return 1;
2300 }
2301
2302
2303 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2304 struct wpa_bss *bss)
2305 {
2306 size_t i;
2307
2308 if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
2309 wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2310 return 128; /* cannot check preference with domain name */
2311 }
2312
2313 if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2314 {
2315 wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2316 return 0; /* max preference for home SP network */
2317 }
2318
2319 for (i = 0; i < cred->num_roaming_partner; i++) {
2320 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2321 bss->anqp->domain_name)) {
2322 wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2323 cred->roaming_partner[i].priority);
2324 return cred->roaming_partner[i].priority;
2325 }
2326 }
2327
2328 wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2329 return 128;
2330 }
2331
2332
2333 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2334 struct wpa_bss *selected,
2335 struct wpa_cred *cred)
2336 {
2337 struct wpa_bss *bss;
2338 u8 best_prio, prio;
2339 struct wpa_cred *cred2;
2340
2341 /*
2342 * Check if any other BSS is operated by a more preferred roaming
2343 * partner.
2344 */
2345
2346 best_prio = roaming_prio(wpa_s, cred, selected);
2347 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2348 MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2349 cred->id);
2350
2351 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2352 if (bss == selected)
2353 continue;
2354 cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2355 if (!cred2)
2356 continue;
2357 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2358 continue;
2359 prio = roaming_prio(wpa_s, cred2, bss);
2360 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2361 MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2362 cred2->id);
2363 if (prio < best_prio) {
2364 int bh1, bh2, load1, load2, conn1, conn2;
2365 bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2366 load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2367 conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2368 bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2369 load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2370 conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2371 wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d new: %d %d %d",
2372 bh1, load1, conn1, bh2, load2, conn2);
2373 if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2374 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2375 best_prio = prio;
2376 selected = bss;
2377 }
2378 }
2379 }
2380
2381 return selected;
2382 }
2383
2384
2385 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2386 {
2387 struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2388 struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2389 unsigned int count = 0;
2390 const char *type;
2391 int res;
2392 struct wpa_cred *cred, *selected_cred = NULL;
2393 struct wpa_cred *selected_home_cred = NULL;
2394 struct wpa_cred *selected2_cred = NULL;
2395 struct wpa_cred *selected2_home_cred = NULL;
2396
2397 wpa_s->network_select = 0;
2398
2399 wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2400 wpa_s->auto_select);
2401 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2402 int excluded = 0;
2403 int bh, bss_load, conn_capab;
2404 cred = interworking_credentials_available(wpa_s, bss,
2405 &excluded);
2406 if (!cred)
2407 continue;
2408
2409 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2410 /*
2411 * We currently support only HS 2.0 networks and those
2412 * are required to use WPA2-Enterprise.
2413 */
2414 wpa_msg(wpa_s, MSG_DEBUG,
2415 "Interworking: Credential match with " MACSTR
2416 " but network does not use RSN",
2417 MAC2STR(bss->bssid));
2418 continue;
2419 }
2420 if (!excluded)
2421 count++;
2422 res = interworking_home_sp(wpa_s, bss->anqp ?
2423 bss->anqp->domain_name : NULL);
2424 if (res > 0)
2425 type = "home";
2426 else if (res == 0)
2427 type = "roaming";
2428 else
2429 type = "unknown";
2430 bh = cred_below_min_backhaul(wpa_s, cred, bss);
2431 bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2432 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2433 wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2434 excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2435 MAC2STR(bss->bssid), type,
2436 bh ? " below_min_backhaul=1" : "",
2437 bss_load ? " over_max_bss_load=1" : "",
2438 conn_capab ? " conn_capab_missing=1" : "",
2439 cred->id, cred->priority, cred->sp_priority);
2440 if (excluded)
2441 continue;
2442 if (wpa_s->auto_select ||
2443 (wpa_s->conf->auto_interworking &&
2444 wpa_s->auto_network_select)) {
2445 if (bh || bss_load || conn_capab) {
2446 if (selected2_cred == NULL ||
2447 cred_prio_cmp(cred, selected2_cred) > 0) {
2448 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2449 selected2 = bss;
2450 selected2_cred = cred;
2451 }
2452 if (res > 0 &&
2453 (selected2_home_cred == NULL ||
2454 cred_prio_cmp(cred, selected2_home_cred) >
2455 0)) {
2456 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2457 selected2_home = bss;
2458 selected2_home_cred = cred;
2459 }
2460 } else {
2461 if (selected_cred == NULL ||
2462 cred_prio_cmp(cred, selected_cred) > 0) {
2463 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2464 selected = bss;
2465 selected_cred = cred;
2466 }
2467 if (res > 0 &&
2468 (selected_home_cred == NULL ||
2469 cred_prio_cmp(cred, selected_home_cred) >
2470 0)) {
2471 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2472 selected_home = bss;
2473 selected_home_cred = cred;
2474 }
2475 }
2476 }
2477 }
2478
2479 if (selected_home && selected_home != selected &&
2480 selected_home_cred &&
2481 (selected_cred == NULL ||
2482 cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2483 /* Prefer network operated by the Home SP */
2484 wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2485 selected = selected_home;
2486 selected_cred = selected_home_cred;
2487 }
2488
2489 if (!selected) {
2490 if (selected2_home) {
2491 wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2492 selected = selected2_home;
2493 selected_cred = selected2_home_cred;
2494 } else if (selected2) {
2495 wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2496 selected = selected2;
2497 selected_cred = selected2_cred;
2498 }
2499 }
2500
2501 if (count == 0) {
2502 /*
2503 * No matching network was found based on configured
2504 * credentials. Check whether any of the enabled network blocks
2505 * have matching APs.
2506 */
2507 if (interworking_find_network_match(wpa_s)) {
2508 wpa_msg(wpa_s, MSG_DEBUG,
2509 "Interworking: Possible BSS match for enabled network configurations");
2510 if (wpa_s->auto_select) {
2511 interworking_reconnect(wpa_s);
2512 return;
2513 }
2514 }
2515
2516 if (wpa_s->auto_network_select) {
2517 wpa_msg(wpa_s, MSG_DEBUG,
2518 "Interworking: Continue scanning after ANQP fetch");
2519 wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2520 0);
2521 return;
2522 }
2523
2524 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2525 "with matching credentials found");
2526 if (wpa_s->wpa_state == WPA_SCANNING)
2527 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2528 }
2529
2530 if (selected) {
2531 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2532 MAC2STR(selected->bssid));
2533 selected = pick_best_roaming_partner(wpa_s, selected,
2534 selected_cred);
2535 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2536 " (after best roaming partner selection)",
2537 MAC2STR(selected->bssid));
2538 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2539 MAC2STR(selected->bssid));
2540 interworking_connect(wpa_s, selected, 0);
2541 }
2542 }
2543
2544
2545 static struct wpa_bss_anqp *
2546 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2547 {
2548 struct wpa_bss *other;
2549
2550 if (is_zero_ether_addr(bss->hessid))
2551 return NULL; /* Cannot be in the same homegenous ESS */
2552
2553 dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2554 if (other == bss)
2555 continue;
2556 if (other->anqp == NULL)
2557 continue;
2558 if (other->anqp->roaming_consortium == NULL &&
2559 other->anqp->nai_realm == NULL &&
2560 other->anqp->anqp_3gpp == NULL &&
2561 other->anqp->domain_name == NULL)
2562 continue;
2563 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2564 continue;
2565 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2566 continue;
2567 if (bss->ssid_len != other->ssid_len ||
2568 os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2569 continue;
2570
2571 wpa_msg(wpa_s, MSG_DEBUG,
2572 "Interworking: Share ANQP data with already fetched BSSID "
2573 MACSTR " and " MACSTR,
2574 MAC2STR(other->bssid), MAC2STR(bss->bssid));
2575 other->anqp->users++;
2576 return other->anqp;
2577 }
2578
2579 return NULL;
2580 }
2581
2582
2583 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2584 {
2585 struct wpa_bss *bss;
2586 int found = 0;
2587 const u8 *ie;
2588
2589 wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2590 "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2591 wpa_s->fetch_anqp_in_progress,
2592 wpa_s->fetch_osu_icon_in_progress);
2593
2594 if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2595 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2596 return;
2597 }
2598
2599 #ifdef CONFIG_HS20
2600 if (wpa_s->fetch_osu_icon_in_progress) {
2601 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2602 hs20_next_osu_icon(wpa_s);
2603 return;
2604 }
2605 #endif /* CONFIG_HS20 */
2606
2607 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2608 if (!(bss->caps & IEEE80211_CAP_ESS))
2609 continue;
2610 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
2611 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
2612 continue; /* AP does not support Interworking */
2613 if (disallowed_bssid(wpa_s, bss->bssid) ||
2614 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2615 continue; /* Disallowed BSS */
2616
2617 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2618 if (bss->anqp == NULL) {
2619 bss->anqp = interworking_match_anqp_info(wpa_s,
2620 bss);
2621 if (bss->anqp) {
2622 /* Shared data already fetched */
2623 continue;
2624 }
2625 bss->anqp = wpa_bss_anqp_alloc();
2626 if (bss->anqp == NULL)
2627 break;
2628 }
2629 found++;
2630 bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2631 wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2632 MACSTR, MAC2STR(bss->bssid));
2633 interworking_anqp_send_req(wpa_s, bss);
2634 break;
2635 }
2636 }
2637
2638 if (found == 0) {
2639 #ifdef CONFIG_HS20
2640 if (wpa_s->fetch_osu_info) {
2641 if (wpa_s->num_prov_found == 0 &&
2642 wpa_s->fetch_osu_waiting_scan &&
2643 wpa_s->num_osu_scans < 3) {
2644 wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2645 hs20_start_osu_scan(wpa_s);
2646 return;
2647 }
2648 wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2649 hs20_osu_icon_fetch(wpa_s);
2650 return;
2651 }
2652 #endif /* CONFIG_HS20 */
2653 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2654 wpa_s->fetch_anqp_in_progress = 0;
2655 if (wpa_s->network_select)
2656 interworking_select_network(wpa_s);
2657 }
2658 }
2659
2660
2661 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2662 {
2663 struct wpa_bss *bss;
2664
2665 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2666 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2667
2668 wpa_s->fetch_anqp_in_progress = 1;
2669
2670 /*
2671 * Start actual ANQP operation from eloop call to make sure the loop
2672 * does not end up using excessive recursion.
2673 */
2674 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2675 }
2676
2677
2678 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2679 {
2680 if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2681 return 0;
2682
2683 wpa_s->network_select = 0;
2684 wpa_s->fetch_all_anqp = 1;
2685 wpa_s->fetch_osu_info = 0;
2686
2687 interworking_start_fetch_anqp(wpa_s);
2688
2689 return 0;
2690 }
2691
2692
2693 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2694 {
2695 if (!wpa_s->fetch_anqp_in_progress)
2696 return;
2697
2698 wpa_s->fetch_anqp_in_progress = 0;
2699 }
2700
2701
2702 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
2703 u16 info_ids[], size_t num_ids, u32 subtypes)
2704 {
2705 struct wpabuf *buf;
2706 struct wpabuf *hs20_buf = NULL;
2707 int ret = 0;
2708 int freq;
2709 struct wpa_bss *bss;
2710 int res;
2711
2712 bss = wpa_bss_get_bssid(wpa_s, dst);
2713 if (!bss) {
2714 wpa_printf(MSG_WARNING,
2715 "ANQP: Cannot send query to unknown BSS "
2716 MACSTR, MAC2STR(dst));
2717 return -1;
2718 }
2719
2720 wpa_bss_anqp_unshare_alloc(bss);
2721 freq = bss->freq;
2722
2723 wpa_msg(wpa_s, MSG_DEBUG,
2724 "ANQP: Query Request to " MACSTR " for %u id(s)",
2725 MAC2STR(dst), (unsigned int) num_ids);
2726
2727 #ifdef CONFIG_HS20
2728 if (subtypes != 0) {
2729 hs20_buf = wpabuf_alloc(100);
2730 if (hs20_buf == NULL)
2731 return -1;
2732 hs20_put_anqp_req(subtypes, NULL, 0, hs20_buf);
2733 }
2734 #endif /* CONFIG_HS20 */
2735
2736 buf = anqp_build_req(info_ids, num_ids, hs20_buf);
2737 wpabuf_free(hs20_buf);
2738 if (buf == NULL)
2739 return -1;
2740
2741 res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
2742 if (res < 0) {
2743 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
2744 wpabuf_free(buf);
2745 ret = -1;
2746 } else {
2747 wpa_msg(wpa_s, MSG_DEBUG,
2748 "ANQP: Query started with dialog token %u", res);
2749 }
2750
2751 return ret;
2752 }
2753
2754
2755 static void anqp_add_extra(struct wpa_supplicant *wpa_s,
2756 struct wpa_bss_anqp *anqp, u16 info_id,
2757 const u8 *data, size_t slen)
2758 {
2759 struct wpa_bss_anqp_elem *tmp, *elem = NULL;
2760
2761 if (!anqp)
2762 return;
2763
2764 dl_list_for_each(tmp, &anqp->anqp_elems, struct wpa_bss_anqp_elem,
2765 list) {
2766 if (tmp->infoid == info_id) {
2767 elem = tmp;
2768 break;
2769 }
2770 }
2771
2772 if (!elem) {
2773 elem = os_zalloc(sizeof(*elem));
2774 if (!elem)
2775 return;
2776 elem->infoid = info_id;
2777 dl_list_add(&anqp->anqp_elems, &elem->list);
2778 } else {
2779 wpabuf_free(elem->payload);
2780 }
2781
2782 elem->payload = wpabuf_alloc_copy(data, slen);
2783 if (!elem->payload) {
2784 dl_list_del(&elem->list);
2785 os_free(elem);
2786 }
2787 }
2788
2789
2790 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2791 struct wpa_bss *bss, const u8 *sa,
2792 u16 info_id,
2793 const u8 *data, size_t slen,
2794 u8 dialog_token)
2795 {
2796 const u8 *pos = data;
2797 struct wpa_bss_anqp *anqp = NULL;
2798 #ifdef CONFIG_HS20
2799 u8 type;
2800 #endif /* CONFIG_HS20 */
2801
2802 if (bss)
2803 anqp = bss->anqp;
2804
2805 switch (info_id) {
2806 case ANQP_CAPABILITY_LIST:
2807 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2808 " ANQP Capability list", MAC2STR(sa));
2809 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list",
2810 pos, slen);
2811 if (anqp) {
2812 wpabuf_free(anqp->capability_list);
2813 anqp->capability_list = wpabuf_alloc_copy(pos, slen);
2814 }
2815 break;
2816 case ANQP_VENUE_NAME:
2817 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2818 " Venue Name", MAC2STR(sa));
2819 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2820 if (anqp) {
2821 wpabuf_free(anqp->venue_name);
2822 anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2823 }
2824 break;
2825 case ANQP_NETWORK_AUTH_TYPE:
2826 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2827 " Network Authentication Type information",
2828 MAC2STR(sa));
2829 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2830 "Type", pos, slen);
2831 if (anqp) {
2832 wpabuf_free(anqp->network_auth_type);
2833 anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2834 }
2835 break;
2836 case ANQP_ROAMING_CONSORTIUM:
2837 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2838 " Roaming Consortium list", MAC2STR(sa));
2839 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2840 pos, slen);
2841 if (anqp) {
2842 wpabuf_free(anqp->roaming_consortium);
2843 anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2844 }
2845 break;
2846 case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2847 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2848 " IP Address Type Availability information",
2849 MAC2STR(sa));
2850 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2851 pos, slen);
2852 if (anqp) {
2853 wpabuf_free(anqp->ip_addr_type_availability);
2854 anqp->ip_addr_type_availability =
2855 wpabuf_alloc_copy(pos, slen);
2856 }
2857 break;
2858 case ANQP_NAI_REALM:
2859 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2860 " NAI Realm list", MAC2STR(sa));
2861 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2862 if (anqp) {
2863 wpabuf_free(anqp->nai_realm);
2864 anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2865 }
2866 break;
2867 case ANQP_3GPP_CELLULAR_NETWORK:
2868 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2869 " 3GPP Cellular Network information", MAC2STR(sa));
2870 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2871 pos, slen);
2872 if (anqp) {
2873 wpabuf_free(anqp->anqp_3gpp);
2874 anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2875 }
2876 break;
2877 case ANQP_DOMAIN_NAME:
2878 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2879 " Domain Name list", MAC2STR(sa));
2880 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2881 if (anqp) {
2882 wpabuf_free(anqp->domain_name);
2883 anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2884 }
2885 break;
2886 case ANQP_VENDOR_SPECIFIC:
2887 if (slen < 3)
2888 return;
2889
2890 switch (WPA_GET_BE24(pos)) {
2891 #ifdef CONFIG_HS20
2892 case OUI_WFA:
2893 pos += 3;
2894 slen -= 3;
2895
2896 if (slen < 1)
2897 return;
2898 type = *pos++;
2899 slen--;
2900
2901 switch (type) {
2902 case HS20_ANQP_OUI_TYPE:
2903 hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
2904 pos, slen,
2905 dialog_token);
2906 break;
2907 default:
2908 wpa_msg(wpa_s, MSG_DEBUG,
2909 "HS20: Unsupported ANQP vendor type %u",
2910 type);
2911 break;
2912 }
2913 break;
2914 #endif /* CONFIG_HS20 */
2915 default:
2916 wpa_msg(wpa_s, MSG_DEBUG,
2917 "Interworking: Unsupported vendor-specific ANQP OUI %06x",
2918 WPA_GET_BE24(pos));
2919 return;
2920 }
2921 break;
2922 default:
2923 wpa_msg(wpa_s, MSG_DEBUG,
2924 "Interworking: Unsupported ANQP Info ID %u", info_id);
2925 anqp_add_extra(wpa_s, anqp, info_id, data, slen);
2926 break;
2927 }
2928 }
2929
2930
2931 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2932 enum gas_query_result result,
2933 const struct wpabuf *adv_proto,
2934 const struct wpabuf *resp, u16 status_code)
2935 {
2936 struct wpa_supplicant *wpa_s = ctx;
2937 const u8 *pos;
2938 const u8 *end;
2939 u16 info_id;
2940 u16 slen;
2941 struct wpa_bss *bss = NULL, *tmp;
2942 const char *anqp_result = "SUCCESS";
2943
2944 wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
2945 " dialog_token=%u result=%d status_code=%u",
2946 MAC2STR(dst), dialog_token, result, status_code);
2947 if (result != GAS_QUERY_SUCCESS) {
2948 #ifdef CONFIG_HS20
2949 if (wpa_s->fetch_osu_icon_in_progress)
2950 hs20_icon_fetch_failed(wpa_s);
2951 #endif /* CONFIG_HS20 */
2952 anqp_result = "FAILURE";
2953 goto out;
2954 }
2955
2956 pos = wpabuf_head(adv_proto);
2957 if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2958 pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2959 wpa_msg(wpa_s, MSG_DEBUG,
2960 "ANQP: Unexpected Advertisement Protocol in response");
2961 #ifdef CONFIG_HS20
2962 if (wpa_s->fetch_osu_icon_in_progress)
2963 hs20_icon_fetch_failed(wpa_s);
2964 #endif /* CONFIG_HS20 */
2965 anqp_result = "INVALID_FRAME";
2966 goto out;
2967 }
2968
2969 /*
2970 * If possible, select the BSS entry based on which BSS entry was used
2971 * for the request. This can help in cases where multiple BSS entries
2972 * may exist for the same AP.
2973 */
2974 dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2975 if (tmp == wpa_s->interworking_gas_bss &&
2976 os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2977 bss = tmp;
2978 break;
2979 }
2980 }
2981 if (bss == NULL)
2982 bss = wpa_bss_get_bssid(wpa_s, dst);
2983
2984 pos = wpabuf_head(resp);
2985 end = pos + wpabuf_len(resp);
2986
2987 while (pos < end) {
2988 unsigned int left = end - pos;
2989
2990 if (left < 4) {
2991 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element");
2992 anqp_result = "INVALID_FRAME";
2993 goto out_parse_done;
2994 }
2995 info_id = WPA_GET_LE16(pos);
2996 pos += 2;
2997 slen = WPA_GET_LE16(pos);
2998 pos += 2;
2999 left -= 4;
3000 if (left < slen) {
3001 wpa_msg(wpa_s, MSG_DEBUG,
3002 "ANQP: Invalid element length for Info ID %u",
3003 info_id);
3004 anqp_result = "INVALID_FRAME";
3005 goto out_parse_done;
3006 }
3007 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
3008 slen, dialog_token);
3009 pos += slen;
3010 }
3011
3012 out_parse_done:
3013 #ifdef CONFIG_HS20
3014 hs20_notify_parse_done(wpa_s);
3015 #endif /* CONFIG_HS20 */
3016 out:
3017 wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
3018 MAC2STR(dst), anqp_result);
3019 }
3020
3021
3022 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
3023 struct wpa_scan_results *scan_res)
3024 {
3025 wpa_msg(wpa_s, MSG_DEBUG,
3026 "Interworking: Scan results available - start ANQP fetch");
3027 interworking_start_fetch_anqp(wpa_s);
3028 }
3029
3030
3031 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
3032 int *freqs)
3033 {
3034 interworking_stop_fetch_anqp(wpa_s);
3035 wpa_s->network_select = 1;
3036 wpa_s->auto_network_select = 0;
3037 wpa_s->auto_select = !!auto_select;
3038 wpa_s->fetch_all_anqp = 0;
3039 wpa_s->fetch_osu_info = 0;
3040 wpa_msg(wpa_s, MSG_DEBUG,
3041 "Interworking: Start scan for network selection");
3042 wpa_s->scan_res_handler = interworking_scan_res_handler;
3043 wpa_s->normal_scans = 0;
3044 wpa_s->scan_req = MANUAL_SCAN_REQ;
3045 os_free(wpa_s->manual_scan_freqs);
3046 wpa_s->manual_scan_freqs = freqs;
3047 wpa_s->after_wps = 0;
3048 wpa_s->known_wps_freq = 0;
3049 wpa_supplicant_req_scan(wpa_s, 0, 0);
3050
3051 return 0;
3052 }
3053
3054
3055 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
3056 enum gas_query_result result,
3057 const struct wpabuf *adv_proto,
3058 const struct wpabuf *resp, u16 status_code)
3059 {
3060 struct wpa_supplicant *wpa_s = ctx;
3061 struct wpabuf *n;
3062
3063 wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
3064 " dialog_token=%d status_code=%d resp_len=%d",
3065 MAC2STR(addr), dialog_token, status_code,
3066 resp ? (int) wpabuf_len(resp) : -1);
3067 if (!resp)
3068 return;
3069
3070 n = wpabuf_dup(resp);
3071 if (n == NULL)
3072 return;
3073 wpabuf_free(wpa_s->prev_gas_resp);
3074 wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
3075 os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
3076 wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
3077 wpa_s->last_gas_resp = n;
3078 os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
3079 wpa_s->last_gas_dialog_token = dialog_token;
3080 }
3081
3082
3083 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
3084 const struct wpabuf *adv_proto,
3085 const struct wpabuf *query)
3086 {
3087 struct wpabuf *buf;
3088 int ret = 0;
3089 int freq;
3090 struct wpa_bss *bss;
3091 int res;
3092 size_t len;
3093 u8 query_resp_len_limit = 0;
3094
3095 freq = wpa_s->assoc_freq;
3096 bss = wpa_bss_get_bssid(wpa_s, dst);
3097 if (bss)
3098 freq = bss->freq;
3099 if (freq <= 0)
3100 return -1;
3101
3102 wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
3103 MAC2STR(dst), freq);
3104 wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
3105 wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
3106
3107 len = 3 + wpabuf_len(adv_proto) + 2;
3108 if (query)
3109 len += wpabuf_len(query);
3110 buf = gas_build_initial_req(0, len);
3111 if (buf == NULL)
3112 return -1;
3113
3114 /* Advertisement Protocol IE */
3115 wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3116 wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3117 wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3118 wpabuf_put_buf(buf, adv_proto);
3119
3120 /* GAS Query */
3121 if (query) {
3122 wpabuf_put_le16(buf, wpabuf_len(query));
3123 wpabuf_put_buf(buf, query);
3124 } else
3125 wpabuf_put_le16(buf, 0);
3126
3127 res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
3128 if (res < 0) {
3129 wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
3130 wpabuf_free(buf);
3131 ret = -1;
3132 } else
3133 wpa_msg(wpa_s, MSG_DEBUG,
3134 "GAS: Query started with dialog token %u", res);
3135
3136 return ret;
3137 }
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