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[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 if (num_ids > 0) {
110 len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
111 for (i = 0; i < num_ids; i++)
112 wpabuf_put_le16(buf, info_ids[i]);
113 gas_anqp_set_element_len(buf, len_pos);
114 }
115 if (extra)
116 wpabuf_put_buf(buf, extra);
117
118 gas_anqp_set_len(buf);
119
120 return buf;
121 }
122
123
124 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
125 u8 dialog_token,
126 enum gas_query_result result,
127 const struct wpabuf *adv_proto,
128 const struct wpabuf *resp,
129 u16 status_code)
130 {
131 struct wpa_supplicant *wpa_s = ctx;
132
133 wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR
134 " dialog_token=%u result=%d status_code=%u",
135 MAC2STR(dst), dialog_token, result, status_code);
136 anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
137 status_code);
138 interworking_next_anqp_fetch(wpa_s);
139 }
140
141
142 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
143 {
144 struct wpa_cred *cred;
145
146 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
147 if (cred->roaming_consortium_len)
148 return 1;
149 if (cred->required_roaming_consortium_len)
150 return 1;
151 }
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 (end - pos < 3) {
368 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
369 return NULL;
370 }
371
372 elen = *pos++;
373 if (elen > end - pos || 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 (end - pos < 2) {
387 wpa_printf(MSG_DEBUG,
388 "No room for Authentication Parameter subfield header");
389 return NULL;
390 }
391
392 id = *pos++;
393 len = *pos++;
394 if (len > end - pos) {
395 wpa_printf(MSG_DEBUG,
396 "No room for Authentication Parameter subfield");
397 return NULL;
398 }
399
400 switch (id) {
401 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
402 if (len < 1)
403 break;
404 e->inner_non_eap = *pos;
405 if (e->method != EAP_TYPE_TTLS)
406 break;
407 switch (*pos) {
408 case NAI_REALM_INNER_NON_EAP_PAP:
409 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
410 break;
411 case NAI_REALM_INNER_NON_EAP_CHAP:
412 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
413 break;
414 case NAI_REALM_INNER_NON_EAP_MSCHAP:
415 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
416 break;
417 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
418 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
419 break;
420 }
421 break;
422 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
423 if (len < 1)
424 break;
425 e->inner_method = *pos;
426 wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
427 e->inner_method);
428 break;
429 case NAI_REALM_EAP_AUTH_CRED_TYPE:
430 if (len < 1)
431 break;
432 e->cred_type = *pos;
433 wpa_printf(MSG_DEBUG, "Credential Type: %u",
434 e->cred_type);
435 break;
436 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
437 if (len < 1)
438 break;
439 e->tunneled_cred_type = *pos;
440 wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
441 "Type: %u", e->tunneled_cred_type);
442 break;
443 default:
444 wpa_printf(MSG_DEBUG, "Unsupported Authentication "
445 "Parameter: id=%u len=%u", id, len);
446 wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
447 "Value", pos, len);
448 break;
449 }
450
451 pos += len;
452 }
453
454 return e_end;
455 }
456
457
458 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
459 const u8 *end)
460 {
461 u16 len;
462 const u8 *f_end;
463 u8 realm_len, e;
464
465 if (end - pos < 4) {
466 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
467 "fixed fields");
468 return NULL;
469 }
470
471 len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
472 pos += 2;
473 if (len > end - pos || len < 3) {
474 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
475 "(len=%u; left=%u)",
476 len, (unsigned int) (end - pos));
477 return NULL;
478 }
479 f_end = pos + len;
480
481 r->encoding = *pos++;
482 realm_len = *pos++;
483 if (realm_len > f_end - pos) {
484 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
485 "(len=%u; left=%u)",
486 realm_len, (unsigned int) (f_end - pos));
487 return NULL;
488 }
489 wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
490 r->realm = dup_binstr(pos, realm_len);
491 if (r->realm == NULL)
492 return NULL;
493 pos += realm_len;
494
495 if (f_end - pos < 1) {
496 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
497 return NULL;
498 }
499 r->eap_count = *pos++;
500 wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
501 if (r->eap_count * 3 > f_end - pos) {
502 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
503 return NULL;
504 }
505 r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
506 if (r->eap == NULL)
507 return NULL;
508
509 for (e = 0; e < r->eap_count; e++) {
510 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
511 if (pos == NULL)
512 return NULL;
513 }
514
515 return f_end;
516 }
517
518
519 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
520 {
521 struct nai_realm *realm;
522 const u8 *pos, *end;
523 u16 i, num;
524 size_t left;
525
526 if (anqp == NULL)
527 return NULL;
528 left = wpabuf_len(anqp);
529 if (left < 2)
530 return NULL;
531
532 pos = wpabuf_head_u8(anqp);
533 end = pos + left;
534 num = WPA_GET_LE16(pos);
535 wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
536 pos += 2;
537 left -= 2;
538
539 if (num > left / 5) {
540 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
541 "enough data (%u octets) for that many realms",
542 num, (unsigned int) left);
543 return NULL;
544 }
545
546 realm = os_calloc(num, sizeof(struct nai_realm));
547 if (realm == NULL)
548 return NULL;
549
550 for (i = 0; i < num; i++) {
551 pos = nai_realm_parse_realm(&realm[i], pos, end);
552 if (pos == NULL) {
553 nai_realm_free(realm, num);
554 return NULL;
555 }
556 }
557
558 *count = num;
559 return realm;
560 }
561
562
563 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
564 {
565 char *tmp, *pos, *end;
566 int match = 0;
567
568 if (realm->realm == NULL || home_realm == NULL)
569 return 0;
570
571 if (os_strchr(realm->realm, ';') == NULL)
572 return os_strcasecmp(realm->realm, home_realm) == 0;
573
574 tmp = os_strdup(realm->realm);
575 if (tmp == NULL)
576 return 0;
577
578 pos = tmp;
579 while (*pos) {
580 end = os_strchr(pos, ';');
581 if (end)
582 *end = '\0';
583 if (os_strcasecmp(pos, home_realm) == 0) {
584 match = 1;
585 break;
586 }
587 if (end == NULL)
588 break;
589 pos = end + 1;
590 }
591
592 os_free(tmp);
593
594 return match;
595 }
596
597
598 static int nai_realm_cred_username(struct wpa_supplicant *wpa_s,
599 struct nai_realm_eap *eap)
600 {
601 if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
602 wpa_msg(wpa_s, MSG_DEBUG,
603 "nai-realm-cred-username: EAP method not supported: %d",
604 eap->method);
605 return 0; /* method not supported */
606 }
607
608 if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
609 eap->method != EAP_TYPE_FAST) {
610 /* Only tunneled methods with username/password supported */
611 wpa_msg(wpa_s, MSG_DEBUG,
612 "nai-realm-cred-username: Method: %d is not TTLS, PEAP, or FAST",
613 eap->method);
614 return 0;
615 }
616
617 if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) {
618 if (eap->inner_method &&
619 eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
620 wpa_msg(wpa_s, MSG_DEBUG,
621 "nai-realm-cred-username: PEAP/FAST: Inner method not supported: %d",
622 eap->inner_method);
623 return 0;
624 }
625 if (!eap->inner_method &&
626 eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) {
627 wpa_msg(wpa_s, MSG_DEBUG,
628 "nai-realm-cred-username: MSCHAPv2 not supported");
629 return 0;
630 }
631 }
632
633 if (eap->method == EAP_TYPE_TTLS) {
634 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
635 return 1; /* Assume TTLS/MSCHAPv2 is used */
636 if (eap->inner_method &&
637 eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
638 wpa_msg(wpa_s, MSG_DEBUG,
639 "nai-realm-cred-username: TTLS, but inner not supported: %d",
640 eap->inner_method);
641 return 0;
642 }
643 if (eap->inner_non_eap &&
644 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
645 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
646 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
647 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) {
648 wpa_msg(wpa_s, MSG_DEBUG,
649 "nai-realm-cred-username: TTLS, inner-non-eap not supported: %d",
650 eap->inner_non_eap);
651 return 0;
652 }
653 }
654
655 if (eap->inner_method &&
656 eap->inner_method != EAP_TYPE_GTC &&
657 eap->inner_method != EAP_TYPE_MSCHAPV2) {
658 wpa_msg(wpa_s, MSG_DEBUG,
659 "nai-realm-cred-username: inner-method not GTC or MSCHAPv2: %d",
660 eap->inner_method);
661 return 0;
662 }
663
664 return 1;
665 }
666
667
668 static int nai_realm_cred_cert(struct wpa_supplicant *wpa_s,
669 struct nai_realm_eap *eap)
670 {
671 if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
672 wpa_msg(wpa_s, MSG_DEBUG,
673 "nai-realm-cred-cert: Method not supported: %d",
674 eap->method);
675 return 0; /* method not supported */
676 }
677
678 if (eap->method != EAP_TYPE_TLS) {
679 /* Only EAP-TLS supported for credential authentication */
680 wpa_msg(wpa_s, MSG_DEBUG,
681 "nai-realm-cred-cert: Method not TLS: %d",
682 eap->method);
683 return 0;
684 }
685
686 return 1;
687 }
688
689
690 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s,
691 struct wpa_cred *cred,
692 struct nai_realm *realm)
693 {
694 u8 e;
695
696 if (cred->username == NULL ||
697 cred->username[0] == '\0' ||
698 ((cred->password == NULL ||
699 cred->password[0] == '\0') &&
700 (cred->private_key == NULL ||
701 cred->private_key[0] == '\0'))) {
702 wpa_msg(wpa_s, MSG_DEBUG,
703 "nai-realm-find-eap: incomplete cred info: username: %s password: %s private_key: %s",
704 cred->username ? cred->username : "NULL",
705 cred->password ? cred->password : "NULL",
706 cred->private_key ? cred->private_key : "NULL");
707 return NULL;
708 }
709
710 for (e = 0; e < realm->eap_count; e++) {
711 struct nai_realm_eap *eap = &realm->eap[e];
712 if (cred->password && cred->password[0] &&
713 nai_realm_cred_username(wpa_s, eap))
714 return eap;
715 if (cred->private_key && cred->private_key[0] &&
716 nai_realm_cred_cert(wpa_s, eap))
717 return eap;
718 }
719
720 return NULL;
721 }
722
723
724 #ifdef INTERWORKING_3GPP
725
726 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
727 {
728 u8 plmn[3], plmn2[3];
729 const u8 *pos, *end;
730 u8 udhl;
731
732 /*
733 * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
734 * operator is allowed to include only two digits of the MNC, so allow
735 * matches based on both two and three digit MNC assumptions. Since some
736 * SIM/USIM cards may not expose MNC length conveniently, we may be
737 * provided the default MNC length 3 here and as such, checking with MNC
738 * length 2 is justifiable even though 3GPP TS 24.234 does not mention
739 * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
740 * with otherwise matching values would not be good idea in general, so
741 * this should not result in selecting incorrect networks.
742 */
743 /* Match with 3 digit MNC */
744 plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
745 plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
746 plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
747 /* Match with 2 digit MNC */
748 plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
749 plmn2[1] = (imsi[2] - '0') | 0xf0;
750 plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
751
752 if (anqp == NULL)
753 return 0;
754 pos = wpabuf_head_u8(anqp);
755 end = pos + wpabuf_len(anqp);
756 if (end - pos < 2)
757 return 0;
758 if (*pos != 0) {
759 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
760 return 0;
761 }
762 pos++;
763 udhl = *pos++;
764 if (udhl > end - pos) {
765 wpa_printf(MSG_DEBUG, "Invalid UDHL");
766 return 0;
767 }
768 end = pos + udhl;
769
770 wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
771 plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
772 imsi, mnc_len);
773
774 while (end - pos >= 2) {
775 u8 iei, len;
776 const u8 *l_end;
777 iei = *pos++;
778 len = *pos++ & 0x7f;
779 if (len > end - pos)
780 break;
781 l_end = pos + len;
782
783 if (iei == 0 && len > 0) {
784 /* PLMN List */
785 u8 num, i;
786 wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
787 pos, len);
788 num = *pos++;
789 for (i = 0; i < num; i++) {
790 if (l_end - pos < 3)
791 break;
792 if (os_memcmp(pos, plmn, 3) == 0 ||
793 os_memcmp(pos, plmn2, 3) == 0)
794 return 1; /* Found matching PLMN */
795 pos += 3;
796 }
797 } else {
798 wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
799 pos, len);
800 }
801
802 pos = l_end;
803 }
804
805 return 0;
806 }
807
808
809 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
810 size_t mnc_len, char prefix)
811 {
812 const char *sep, *msin;
813 char *end, *pos;
814 size_t msin_len, plmn_len;
815
816 /*
817 * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
818 * Root NAI:
819 * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
820 * <MNC> is zero-padded to three digits in case two-digit MNC is used
821 */
822
823 if (imsi == NULL || os_strlen(imsi) > 16) {
824 wpa_printf(MSG_DEBUG, "No valid IMSI available");
825 return -1;
826 }
827 sep = os_strchr(imsi, '-');
828 if (sep) {
829 plmn_len = sep - imsi;
830 msin = sep + 1;
831 } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
832 plmn_len = 3 + mnc_len;
833 msin = imsi + plmn_len;
834 } else
835 return -1;
836 if (plmn_len != 5 && plmn_len != 6)
837 return -1;
838 msin_len = os_strlen(msin);
839
840 pos = nai;
841 end = nai + nai_len;
842 if (prefix)
843 *pos++ = prefix;
844 os_memcpy(pos, imsi, plmn_len);
845 pos += plmn_len;
846 os_memcpy(pos, msin, msin_len);
847 pos += msin_len;
848 pos += os_snprintf(pos, end - pos, "@wlan.mnc");
849 if (plmn_len == 5) {
850 *pos++ = '0';
851 *pos++ = imsi[3];
852 *pos++ = imsi[4];
853 } else {
854 *pos++ = imsi[3];
855 *pos++ = imsi[4];
856 *pos++ = imsi[5];
857 }
858 os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
859 imsi[0], imsi[1], imsi[2]);
860
861 return 0;
862 }
863
864
865 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
866 {
867 char nai[100];
868 if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
869 return -1;
870 return wpa_config_set_quoted(ssid, "identity", nai);
871 }
872
873 #endif /* INTERWORKING_3GPP */
874
875
876 static int already_connected(struct wpa_supplicant *wpa_s,
877 struct wpa_cred *cred, struct wpa_bss *bss)
878 {
879 struct wpa_ssid *ssid, *sel_ssid;
880 struct wpa_bss *selected;
881
882 if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL)
883 return 0;
884
885 ssid = wpa_s->current_ssid;
886 if (ssid->parent_cred != cred)
887 return 0;
888
889 if (ssid->ssid_len != bss->ssid_len ||
890 os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
891 return 0;
892
893 sel_ssid = NULL;
894 selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid);
895 if (selected && sel_ssid && sel_ssid->priority > ssid->priority)
896 return 0; /* higher priority network in scan results */
897
898 return 1;
899 }
900
901
902 static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
903 struct wpa_cred *cred,
904 struct wpa_bss *bss)
905 {
906 struct wpa_ssid *ssid;
907
908 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
909 if (ssid->parent_cred != cred)
910 continue;
911 if (ssid->ssid_len != bss->ssid_len ||
912 os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
913 continue;
914
915 break;
916 }
917
918 if (ssid == NULL)
919 return;
920
921 wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
922
923 if (ssid == wpa_s->current_ssid) {
924 wpa_sm_set_config(wpa_s->wpa, NULL);
925 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
926 wpa_s->own_disconnect_req = 1;
927 wpa_supplicant_deauthenticate(wpa_s,
928 WLAN_REASON_DEAUTH_LEAVING);
929 }
930
931 wpas_notify_network_removed(wpa_s, ssid);
932 wpa_config_remove_network(wpa_s->conf, ssid->id);
933 }
934
935
936 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
937 struct wpa_ssid *ssid)
938 {
939 const char *key_mgmt = NULL;
940 #ifdef CONFIG_IEEE80211R
941 int res;
942 struct wpa_driver_capa capa;
943
944 res = wpa_drv_get_capa(wpa_s, &capa);
945 if (res == 0 && capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_FT) {
946 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
947 "WPA-EAP WPA-EAP-SHA256 FT-EAP" :
948 "WPA-EAP FT-EAP";
949 }
950 #endif /* CONFIG_IEEE80211R */
951
952 if (!key_mgmt)
953 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
954 "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP";
955 if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0 ||
956 wpa_config_set(ssid, "proto", "RSN", 0) < 0 ||
957 wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
958 return -1;
959 return 0;
960 }
961
962
963 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
964 struct wpa_cred *cred,
965 struct wpa_bss *bss, int only_add)
966 {
967 #ifdef INTERWORKING_3GPP
968 struct wpa_ssid *ssid;
969 int eap_type;
970 int res;
971 char prefix;
972
973 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
974 return -1;
975
976 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
977 " (3GPP)", MAC2STR(bss->bssid));
978
979 if (already_connected(wpa_s, cred, bss)) {
980 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
981 MAC2STR(bss->bssid));
982 return wpa_s->current_ssid->id;
983 }
984
985 remove_duplicate_network(wpa_s, cred, bss);
986
987 ssid = wpa_config_add_network(wpa_s->conf);
988 if (ssid == NULL)
989 return -1;
990 ssid->parent_cred = cred;
991
992 wpas_notify_network_added(wpa_s, ssid);
993 wpa_config_set_network_defaults(ssid);
994 ssid->priority = cred->priority;
995 ssid->temporary = 1;
996 ssid->ssid = os_zalloc(bss->ssid_len + 1);
997 if (ssid->ssid == NULL)
998 goto fail;
999 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1000 ssid->ssid_len = bss->ssid_len;
1001 ssid->eap.sim_num = cred->sim_num;
1002
1003 if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1004 goto fail;
1005
1006 eap_type = EAP_TYPE_SIM;
1007 if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
1008 eap_type = EAP_TYPE_AKA;
1009 if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
1010 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
1011 cred->eap_method[0].method == EAP_TYPE_AKA ||
1012 cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
1013 eap_type = cred->eap_method[0].method;
1014 }
1015
1016 switch (eap_type) {
1017 case EAP_TYPE_SIM:
1018 prefix = '1';
1019 res = wpa_config_set(ssid, "eap", "SIM", 0);
1020 break;
1021 case EAP_TYPE_AKA:
1022 prefix = '0';
1023 res = wpa_config_set(ssid, "eap", "AKA", 0);
1024 break;
1025 case EAP_TYPE_AKA_PRIME:
1026 prefix = '6';
1027 res = wpa_config_set(ssid, "eap", "AKA'", 0);
1028 break;
1029 default:
1030 res = -1;
1031 break;
1032 }
1033 if (res < 0) {
1034 wpa_msg(wpa_s, MSG_DEBUG,
1035 "Selected EAP method (%d) not supported", eap_type);
1036 goto fail;
1037 }
1038
1039 if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
1040 wpa_msg(wpa_s, MSG_DEBUG, "Failed to set Root NAI");
1041 goto fail;
1042 }
1043
1044 if (cred->milenage && cred->milenage[0]) {
1045 if (wpa_config_set_quoted(ssid, "password",
1046 cred->milenage) < 0)
1047 goto fail;
1048 } else if (cred->pcsc) {
1049 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
1050 goto fail;
1051 if (wpa_s->conf->pcsc_pin &&
1052 wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
1053 < 0)
1054 goto fail;
1055 }
1056
1057 wpa_s->next_ssid = ssid;
1058 wpa_config_update_prio_list(wpa_s->conf);
1059 if (!only_add)
1060 interworking_reconnect(wpa_s);
1061
1062 return ssid->id;
1063
1064 fail:
1065 wpas_notify_network_removed(wpa_s, ssid);
1066 wpa_config_remove_network(wpa_s->conf, ssid->id);
1067 #endif /* INTERWORKING_3GPP */
1068 return -1;
1069 }
1070
1071
1072 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
1073 size_t rc_len)
1074 {
1075 const u8 *pos, *end;
1076 u8 lens;
1077
1078 if (ie == NULL)
1079 return 0;
1080
1081 pos = ie + 2;
1082 end = ie + 2 + ie[1];
1083
1084 /* Roaming Consortium element:
1085 * Number of ANQP OIs
1086 * OI #1 and #2 lengths
1087 * OI #1, [OI #2], [OI #3]
1088 */
1089
1090 if (end - pos < 2)
1091 return 0;
1092
1093 pos++; /* skip Number of ANQP OIs */
1094 lens = *pos++;
1095 if ((lens & 0x0f) + (lens >> 4) > end - pos)
1096 return 0;
1097
1098 if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1099 return 1;
1100 pos += lens & 0x0f;
1101
1102 if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1103 return 1;
1104 pos += lens >> 4;
1105
1106 if (pos < end && (size_t) (end - pos) == rc_len &&
1107 os_memcmp(pos, rc_id, rc_len) == 0)
1108 return 1;
1109
1110 return 0;
1111 }
1112
1113
1114 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
1115 const u8 *rc_id, size_t rc_len)
1116 {
1117 const u8 *pos, *end;
1118 u8 len;
1119
1120 if (anqp == NULL)
1121 return 0;
1122
1123 pos = wpabuf_head(anqp);
1124 end = pos + wpabuf_len(anqp);
1125
1126 /* Set of <OI Length, OI> duples */
1127 while (pos < end) {
1128 len = *pos++;
1129 if (len > end - pos)
1130 break;
1131 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1132 return 1;
1133 pos += len;
1134 }
1135
1136 return 0;
1137 }
1138
1139
1140 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
1141 const u8 *rc_id, size_t rc_len)
1142 {
1143 return roaming_consortium_element_match(ie, rc_id, rc_len) ||
1144 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1145 }
1146
1147
1148 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1149 {
1150 const u8 *ie;
1151
1152 if (cred->required_roaming_consortium_len == 0)
1153 return 0;
1154
1155 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1156
1157 if (ie == NULL &&
1158 (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1159 return 1;
1160
1161 return !roaming_consortium_match(ie,
1162 bss->anqp ?
1163 bss->anqp->roaming_consortium : NULL,
1164 cred->required_roaming_consortium,
1165 cred->required_roaming_consortium_len);
1166 }
1167
1168
1169 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1170 {
1171 size_t i;
1172
1173 if (!cred->excluded_ssid)
1174 return 0;
1175
1176 for (i = 0; i < cred->num_excluded_ssid; i++) {
1177 struct excluded_ssid *e = &cred->excluded_ssid[i];
1178 if (bss->ssid_len == e->ssid_len &&
1179 os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1180 return 1;
1181 }
1182
1183 return 0;
1184 }
1185
1186
1187 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
1188 struct wpa_cred *cred, struct wpa_bss *bss)
1189 {
1190 #ifdef CONFIG_HS20
1191 int res;
1192 unsigned int dl_bandwidth, ul_bandwidth;
1193 const u8 *wan;
1194 u8 wan_info, dl_load, ul_load;
1195 u16 lmd;
1196 u32 ul_speed, dl_speed;
1197
1198 if (!cred->min_dl_bandwidth_home &&
1199 !cred->min_ul_bandwidth_home &&
1200 !cred->min_dl_bandwidth_roaming &&
1201 !cred->min_ul_bandwidth_roaming)
1202 return 0; /* No bandwidth constraint specified */
1203
1204 if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL)
1205 return 0; /* No WAN Metrics known - ignore constraint */
1206
1207 wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
1208 wan_info = wan[0];
1209 if (wan_info & BIT(3))
1210 return 1; /* WAN link at capacity */
1211 lmd = WPA_GET_LE16(wan + 11);
1212 if (lmd == 0)
1213 return 0; /* Downlink/Uplink Load was not measured */
1214 dl_speed = WPA_GET_LE32(wan + 1);
1215 ul_speed = WPA_GET_LE32(wan + 5);
1216 dl_load = wan[9];
1217 ul_load = wan[10];
1218
1219 if (dl_speed >= 0xffffff)
1220 dl_bandwidth = dl_speed / 255 * (255 - dl_load);
1221 else
1222 dl_bandwidth = dl_speed * (255 - dl_load) / 255;
1223
1224 if (ul_speed >= 0xffffff)
1225 ul_bandwidth = ul_speed / 255 * (255 - ul_load);
1226 else
1227 ul_bandwidth = ul_speed * (255 - ul_load) / 255;
1228
1229 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1230 bss->anqp->domain_name : NULL);
1231 if (res > 0) {
1232 if (cred->min_dl_bandwidth_home > dl_bandwidth)
1233 return 1;
1234 if (cred->min_ul_bandwidth_home > ul_bandwidth)
1235 return 1;
1236 } else {
1237 if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
1238 return 1;
1239 if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
1240 return 1;
1241 }
1242 #endif /* CONFIG_HS20 */
1243
1244 return 0;
1245 }
1246
1247
1248 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
1249 struct wpa_cred *cred, struct wpa_bss *bss)
1250 {
1251 const u8 *ie;
1252 int res;
1253
1254 if (!cred->max_bss_load)
1255 return 0; /* No BSS Load constraint specified */
1256
1257 ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
1258 if (ie == NULL || ie[1] < 3)
1259 return 0; /* No BSS Load advertised */
1260
1261 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1262 bss->anqp->domain_name : NULL);
1263 if (res <= 0)
1264 return 0; /* Not a home network */
1265
1266 return ie[4] > cred->max_bss_load;
1267 }
1268
1269
1270 #ifdef CONFIG_HS20
1271
1272 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto)
1273 {
1274 while (end - pos >= 4) {
1275 if (pos[0] == proto && pos[3] == 1 /* Open */)
1276 return 1;
1277 pos += 4;
1278 }
1279
1280 return 0;
1281 }
1282
1283
1284 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto,
1285 u16 port)
1286 {
1287 while (end - pos >= 4) {
1288 if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
1289 pos[3] == 1 /* Open */)
1290 return 1;
1291 pos += 4;
1292 }
1293
1294 return 0;
1295 }
1296
1297 #endif /* CONFIG_HS20 */
1298
1299
1300 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
1301 struct wpa_cred *cred, struct wpa_bss *bss)
1302 {
1303 #ifdef CONFIG_HS20
1304 int res;
1305 const u8 *capab, *end;
1306 unsigned int i, j;
1307 int *ports;
1308
1309 if (!cred->num_req_conn_capab)
1310 return 0; /* No connection capability constraint specified */
1311
1312 if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL)
1313 return 0; /* No Connection Capability known - ignore constraint
1314 */
1315
1316 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1317 bss->anqp->domain_name : NULL);
1318 if (res > 0)
1319 return 0; /* No constraint in home network */
1320
1321 capab = wpabuf_head(bss->anqp->hs20_connection_capability);
1322 end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
1323
1324 for (i = 0; i < cred->num_req_conn_capab; i++) {
1325 ports = cred->req_conn_capab_port[i];
1326 if (!ports) {
1327 if (!has_proto_match(capab, end,
1328 cred->req_conn_capab_proto[i]))
1329 return 1;
1330 } else {
1331 for (j = 0; ports[j] > -1; j++) {
1332 if (!has_proto_port_match(
1333 capab, end,
1334 cred->req_conn_capab_proto[i],
1335 ports[j]))
1336 return 1;
1337 }
1338 }
1339 }
1340 #endif /* CONFIG_HS20 */
1341
1342 return 0;
1343 }
1344
1345
1346 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1347 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1348 int *excluded)
1349 {
1350 struct wpa_cred *cred, *selected = NULL;
1351 const u8 *ie;
1352 int is_excluded = 0;
1353
1354 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1355
1356 if (ie == NULL &&
1357 (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1358 return NULL;
1359
1360 if (wpa_s->conf->cred == NULL)
1361 return NULL;
1362
1363 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1364 if (cred->roaming_consortium_len == 0)
1365 continue;
1366
1367 if (!roaming_consortium_match(ie,
1368 bss->anqp ?
1369 bss->anqp->roaming_consortium :
1370 NULL,
1371 cred->roaming_consortium,
1372 cred->roaming_consortium_len))
1373 continue;
1374
1375 if (cred_no_required_oi_match(cred, bss))
1376 continue;
1377 if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1378 continue;
1379 if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1380 continue;
1381 if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1382 continue;
1383 if (cred_excluded_ssid(cred, bss)) {
1384 if (excluded == NULL)
1385 continue;
1386 if (selected == NULL) {
1387 selected = cred;
1388 is_excluded = 1;
1389 }
1390 } else {
1391 if (selected == NULL || is_excluded ||
1392 cred_prio_cmp(selected, cred) < 0) {
1393 selected = cred;
1394 is_excluded = 0;
1395 }
1396 }
1397 }
1398
1399 if (excluded)
1400 *excluded = is_excluded;
1401
1402 return selected;
1403 }
1404
1405
1406 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1407 struct wpa_cred *cred, int ttls)
1408 {
1409 if (cred->eap_method) {
1410 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1411 cred->eap_method->method == EAP_TYPE_TTLS;
1412
1413 os_free(ssid->eap.eap_methods);
1414 ssid->eap.eap_methods =
1415 os_malloc(sizeof(struct eap_method_type) * 2);
1416 if (ssid->eap.eap_methods == NULL)
1417 return -1;
1418 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1419 sizeof(*cred->eap_method));
1420 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1421 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1422 }
1423
1424 if (ttls && cred->username && cred->username[0]) {
1425 const char *pos;
1426 char *anon;
1427 /* Use anonymous NAI in Phase 1 */
1428 pos = os_strchr(cred->username, '@');
1429 if (pos) {
1430 size_t buflen = 9 + os_strlen(pos) + 1;
1431 anon = os_malloc(buflen);
1432 if (anon == NULL)
1433 return -1;
1434 os_snprintf(anon, buflen, "anonymous%s", pos);
1435 } else if (cred->realm) {
1436 size_t buflen = 10 + os_strlen(cred->realm) + 1;
1437 anon = os_malloc(buflen);
1438 if (anon == NULL)
1439 return -1;
1440 os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1441 } else {
1442 anon = os_strdup("anonymous");
1443 if (anon == NULL)
1444 return -1;
1445 }
1446 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1447 0) {
1448 os_free(anon);
1449 return -1;
1450 }
1451 os_free(anon);
1452 }
1453
1454 if (!ttls && cred->username && cred->username[0] && cred->realm &&
1455 !os_strchr(cred->username, '@')) {
1456 char *id;
1457 size_t buflen;
1458 int res;
1459
1460 buflen = os_strlen(cred->username) + 1 +
1461 os_strlen(cred->realm) + 1;
1462
1463 id = os_malloc(buflen);
1464 if (!id)
1465 return -1;
1466 os_snprintf(id, buflen, "%s@%s", cred->username, cred->realm);
1467 res = wpa_config_set_quoted(ssid, "identity", id);
1468 os_free(id);
1469 if (res < 0)
1470 return -1;
1471 } else if (cred->username && cred->username[0] &&
1472 wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1473 return -1;
1474
1475 if (cred->password && cred->password[0]) {
1476 if (cred->ext_password &&
1477 wpa_config_set(ssid, "password", cred->password, 0) < 0)
1478 return -1;
1479 if (!cred->ext_password &&
1480 wpa_config_set_quoted(ssid, "password", cred->password) <
1481 0)
1482 return -1;
1483 }
1484
1485 if (cred->client_cert && cred->client_cert[0] &&
1486 wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1487 return -1;
1488
1489 #ifdef ANDROID
1490 if (cred->private_key &&
1491 os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1492 /* Use OpenSSL engine configuration for Android keystore */
1493 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1494 wpa_config_set_quoted(ssid, "key_id",
1495 cred->private_key + 11) < 0 ||
1496 wpa_config_set(ssid, "engine", "1", 0) < 0)
1497 return -1;
1498 } else
1499 #endif /* ANDROID */
1500 if (cred->private_key && cred->private_key[0] &&
1501 wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1502 return -1;
1503
1504 if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1505 wpa_config_set_quoted(ssid, "private_key_passwd",
1506 cred->private_key_passwd) < 0)
1507 return -1;
1508
1509 if (cred->phase1) {
1510 os_free(ssid->eap.phase1);
1511 ssid->eap.phase1 = os_strdup(cred->phase1);
1512 }
1513 if (cred->phase2) {
1514 os_free(ssid->eap.phase2);
1515 ssid->eap.phase2 = os_strdup(cred->phase2);
1516 }
1517
1518 if (cred->ca_cert && cred->ca_cert[0] &&
1519 wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1520 return -1;
1521
1522 if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1523 wpa_config_set_quoted(ssid, "domain_suffix_match",
1524 cred->domain_suffix_match) < 0)
1525 return -1;
1526
1527 ssid->eap.ocsp = cred->ocsp;
1528
1529 return 0;
1530 }
1531
1532
1533 static int interworking_connect_roaming_consortium(
1534 struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1535 struct wpa_bss *bss, int only_add)
1536 {
1537 struct wpa_ssid *ssid;
1538
1539 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
1540 " based on roaming consortium match", MAC2STR(bss->bssid));
1541
1542 if (already_connected(wpa_s, cred, bss)) {
1543 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1544 MAC2STR(bss->bssid));
1545 return wpa_s->current_ssid->id;
1546 }
1547
1548 remove_duplicate_network(wpa_s, cred, bss);
1549
1550 ssid = wpa_config_add_network(wpa_s->conf);
1551 if (ssid == NULL)
1552 return -1;
1553 ssid->parent_cred = cred;
1554 wpas_notify_network_added(wpa_s, ssid);
1555 wpa_config_set_network_defaults(ssid);
1556 ssid->priority = cred->priority;
1557 ssid->temporary = 1;
1558 ssid->ssid = os_zalloc(bss->ssid_len + 1);
1559 if (ssid->ssid == NULL)
1560 goto fail;
1561 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1562 ssid->ssid_len = bss->ssid_len;
1563
1564 if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1565 goto fail;
1566
1567 if (cred->eap_method == NULL) {
1568 wpa_msg(wpa_s, MSG_DEBUG,
1569 "Interworking: No EAP method set for credential using roaming consortium");
1570 goto fail;
1571 }
1572
1573 if (interworking_set_eap_params(
1574 ssid, cred,
1575 cred->eap_method->vendor == EAP_VENDOR_IETF &&
1576 cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1577 goto fail;
1578
1579 wpa_s->next_ssid = ssid;
1580 wpa_config_update_prio_list(wpa_s->conf);
1581 if (!only_add)
1582 interworking_reconnect(wpa_s);
1583
1584 return ssid->id;
1585
1586 fail:
1587 wpas_notify_network_removed(wpa_s, ssid);
1588 wpa_config_remove_network(wpa_s->conf, ssid->id);
1589 return -1;
1590 }
1591
1592
1593 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
1594 int only_add)
1595 {
1596 struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1597 struct wpa_ssid *ssid;
1598 struct nai_realm *realm;
1599 struct nai_realm_eap *eap = NULL;
1600 u16 count, i;
1601 char buf[100];
1602 int excluded = 0, *excl = &excluded;
1603 const char *name;
1604
1605 if (wpa_s->conf->cred == NULL || bss == NULL)
1606 return -1;
1607 if (disallowed_bssid(wpa_s, bss->bssid) ||
1608 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1609 wpa_msg(wpa_s, MSG_DEBUG,
1610 "Interworking: Reject connection to disallowed BSS "
1611 MACSTR, MAC2STR(bss->bssid));
1612 return -1;
1613 }
1614
1615 wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1616 " for connection",
1617 MAC2STR(bss->bssid));
1618
1619 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1620 /*
1621 * We currently support only HS 2.0 networks and those are
1622 * required to use WPA2-Enterprise.
1623 */
1624 wpa_msg(wpa_s, MSG_DEBUG,
1625 "Interworking: Network does not use RSN");
1626 return -1;
1627 }
1628
1629 cred_rc = interworking_credentials_available_roaming_consortium(
1630 wpa_s, bss, 0, excl);
1631 if (cred_rc) {
1632 wpa_msg(wpa_s, MSG_DEBUG,
1633 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d",
1634 cred_rc->priority, cred_rc->sp_priority);
1635 if (excl && !(*excl))
1636 excl = NULL;
1637 }
1638
1639 cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1640 if (cred) {
1641 wpa_msg(wpa_s, MSG_DEBUG,
1642 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d",
1643 cred->priority, cred->sp_priority);
1644 if (excl && !(*excl))
1645 excl = NULL;
1646 }
1647
1648 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1649 excl);
1650 if (cred_3gpp) {
1651 wpa_msg(wpa_s, MSG_DEBUG,
1652 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d",
1653 cred_3gpp->priority, cred_3gpp->sp_priority);
1654 if (excl && !(*excl))
1655 excl = NULL;
1656 }
1657
1658 if (!cred_rc && !cred && !cred_3gpp) {
1659 wpa_msg(wpa_s, MSG_DEBUG,
1660 "Interworking: No full credential matches - consider options without BW(etc.) limits");
1661 cred_rc = interworking_credentials_available_roaming_consortium(
1662 wpa_s, bss, 1, excl);
1663 if (cred_rc) {
1664 wpa_msg(wpa_s, MSG_DEBUG,
1665 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)",
1666 cred_rc->priority, cred_rc->sp_priority);
1667 if (excl && !(*excl))
1668 excl = NULL;
1669 }
1670
1671 cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1672 excl);
1673 if (cred) {
1674 wpa_msg(wpa_s, MSG_DEBUG,
1675 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)",
1676 cred->priority, cred->sp_priority);
1677 if (excl && !(*excl))
1678 excl = NULL;
1679 }
1680
1681 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1682 1, excl);
1683 if (cred_3gpp) {
1684 wpa_msg(wpa_s, MSG_DEBUG,
1685 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)",
1686 cred_3gpp->priority, cred_3gpp->sp_priority);
1687 if (excl && !(*excl))
1688 excl = NULL;
1689 }
1690 }
1691
1692 if (cred_rc &&
1693 (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1694 (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1695 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1696 bss, only_add);
1697
1698 if (cred_3gpp &&
1699 (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1700 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss,
1701 only_add);
1702 }
1703
1704 if (cred == NULL) {
1705 wpa_msg(wpa_s, MSG_DEBUG,
1706 "Interworking: No matching credentials found for "
1707 MACSTR, MAC2STR(bss->bssid));
1708 return -1;
1709 }
1710
1711 realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1712 &count);
1713 if (realm == NULL) {
1714 wpa_msg(wpa_s, MSG_DEBUG,
1715 "Interworking: Could not parse NAI Realm list from "
1716 MACSTR, MAC2STR(bss->bssid));
1717 return -1;
1718 }
1719
1720 for (i = 0; i < count; i++) {
1721 if (!nai_realm_match(&realm[i], cred->realm))
1722 continue;
1723 eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1724 if (eap)
1725 break;
1726 }
1727
1728 if (!eap) {
1729 wpa_msg(wpa_s, MSG_DEBUG,
1730 "Interworking: No matching credentials and EAP method found for "
1731 MACSTR, MAC2STR(bss->bssid));
1732 nai_realm_free(realm, count);
1733 return -1;
1734 }
1735
1736 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR,
1737 MAC2STR(bss->bssid));
1738
1739 if (already_connected(wpa_s, cred, bss)) {
1740 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1741 MAC2STR(bss->bssid));
1742 nai_realm_free(realm, count);
1743 return 0;
1744 }
1745
1746 remove_duplicate_network(wpa_s, cred, bss);
1747
1748 ssid = wpa_config_add_network(wpa_s->conf);
1749 if (ssid == NULL) {
1750 nai_realm_free(realm, count);
1751 return -1;
1752 }
1753 ssid->parent_cred = cred;
1754 wpas_notify_network_added(wpa_s, ssid);
1755 wpa_config_set_network_defaults(ssid);
1756 ssid->priority = cred->priority;
1757 ssid->temporary = 1;
1758 ssid->ssid = os_zalloc(bss->ssid_len + 1);
1759 if (ssid->ssid == NULL)
1760 goto fail;
1761 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1762 ssid->ssid_len = bss->ssid_len;
1763
1764 if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1765 goto fail;
1766
1767 if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1768 eap->method), 0) < 0)
1769 goto fail;
1770
1771 switch (eap->method) {
1772 case EAP_TYPE_TTLS:
1773 if (eap->inner_method) {
1774 os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1775 eap_get_name(EAP_VENDOR_IETF,
1776 eap->inner_method));
1777 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1778 goto fail;
1779 break;
1780 }
1781 switch (eap->inner_non_eap) {
1782 case NAI_REALM_INNER_NON_EAP_PAP:
1783 if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1784 0)
1785 goto fail;
1786 break;
1787 case NAI_REALM_INNER_NON_EAP_CHAP:
1788 if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1789 < 0)
1790 goto fail;
1791 break;
1792 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1793 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1794 0) < 0)
1795 goto fail;
1796 break;
1797 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1798 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1799 0) < 0)
1800 goto fail;
1801 break;
1802 default:
1803 /* EAP params were not set - assume TTLS/MSCHAPv2 */
1804 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1805 0) < 0)
1806 goto fail;
1807 break;
1808 }
1809 break;
1810 case EAP_TYPE_PEAP:
1811 case EAP_TYPE_FAST:
1812 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1813 0) < 0)
1814 goto fail;
1815 if (wpa_config_set(ssid, "pac_file",
1816 "\"blob://pac_interworking\"", 0) < 0)
1817 goto fail;
1818 name = eap_get_name(EAP_VENDOR_IETF,
1819 eap->inner_method ? eap->inner_method :
1820 EAP_TYPE_MSCHAPV2);
1821 if (name == NULL)
1822 goto fail;
1823 os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1824 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1825 goto fail;
1826 break;
1827 case EAP_TYPE_TLS:
1828 break;
1829 }
1830
1831 if (interworking_set_eap_params(ssid, cred,
1832 eap->method == EAP_TYPE_TTLS) < 0)
1833 goto fail;
1834
1835 nai_realm_free(realm, count);
1836
1837 wpa_s->next_ssid = ssid;
1838 wpa_config_update_prio_list(wpa_s->conf);
1839 if (!only_add)
1840 interworking_reconnect(wpa_s);
1841
1842 return ssid->id;
1843
1844 fail:
1845 wpas_notify_network_removed(wpa_s, ssid);
1846 wpa_config_remove_network(wpa_s->conf, ssid->id);
1847 nai_realm_free(realm, count);
1848 return -1;
1849 }
1850
1851
1852 #ifdef PCSC_FUNCS
1853 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1854 {
1855 size_t len;
1856
1857 if (wpa_s->imsi[0] && wpa_s->mnc_len)
1858 return 0;
1859
1860 len = sizeof(wpa_s->imsi) - 1;
1861 if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1862 scard_deinit(wpa_s->scard);
1863 wpa_s->scard = NULL;
1864 wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1865 return -1;
1866 }
1867 wpa_s->imsi[len] = '\0';
1868 wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1869 wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1870 wpa_s->imsi, wpa_s->mnc_len);
1871
1872 return 0;
1873 }
1874 #endif /* PCSC_FUNCS */
1875
1876
1877 static struct wpa_cred * interworking_credentials_available_3gpp(
1878 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1879 int *excluded)
1880 {
1881 struct wpa_cred *selected = NULL;
1882 #ifdef INTERWORKING_3GPP
1883 struct wpa_cred *cred;
1884 int ret;
1885 int is_excluded = 0;
1886
1887 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) {
1888 wpa_msg(wpa_s, MSG_DEBUG,
1889 "interworking-avail-3gpp: not avail, anqp: %p anqp_3gpp: %p",
1890 bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
1891 return NULL;
1892 }
1893
1894 #ifdef CONFIG_EAP_PROXY
1895 if (!wpa_s->imsi[0]) {
1896 size_t len;
1897 wpa_msg(wpa_s, MSG_DEBUG,
1898 "Interworking: IMSI not available - try to read again through eap_proxy");
1899 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1900 wpa_s->imsi,
1901 &len);
1902 if (wpa_s->mnc_len > 0) {
1903 wpa_s->imsi[len] = '\0';
1904 wpa_msg(wpa_s, MSG_DEBUG,
1905 "eap_proxy: IMSI %s (MNC length %d)",
1906 wpa_s->imsi, wpa_s->mnc_len);
1907 } else {
1908 wpa_msg(wpa_s, MSG_DEBUG,
1909 "eap_proxy: IMSI not available");
1910 }
1911 }
1912 #endif /* CONFIG_EAP_PROXY */
1913
1914 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1915 char *sep;
1916 const char *imsi;
1917 int mnc_len;
1918 char imsi_buf[16];
1919 size_t msin_len;
1920
1921 #ifdef PCSC_FUNCS
1922 if (cred->pcsc && wpa_s->scard) {
1923 if (interworking_pcsc_read_imsi(wpa_s) < 0)
1924 continue;
1925 imsi = wpa_s->imsi;
1926 mnc_len = wpa_s->mnc_len;
1927 goto compare;
1928 }
1929 #endif /* PCSC_FUNCS */
1930 #ifdef CONFIG_EAP_PROXY
1931 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1932 imsi = wpa_s->imsi;
1933 mnc_len = wpa_s->mnc_len;
1934 goto compare;
1935 }
1936 #endif /* CONFIG_EAP_PROXY */
1937
1938 if (cred->imsi == NULL || !cred->imsi[0] ||
1939 (!wpa_s->conf->external_sim &&
1940 (cred->milenage == NULL || !cred->milenage[0])))
1941 continue;
1942
1943 sep = os_strchr(cred->imsi, '-');
1944 if (sep == NULL ||
1945 (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1946 continue;
1947 mnc_len = sep - cred->imsi - 3;
1948 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1949 sep++;
1950 msin_len = os_strlen(cred->imsi);
1951 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1952 msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1953 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1954 imsi_buf[3 + mnc_len + msin_len] = '\0';
1955 imsi = imsi_buf;
1956
1957 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1958 compare:
1959 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1960 wpa_msg(wpa_s, MSG_DEBUG,
1961 "Interworking: Parsing 3GPP info from " MACSTR,
1962 MAC2STR(bss->bssid));
1963 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1964 wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound",
1965 ret ? "" : "not ");
1966 if (ret) {
1967 if (cred_no_required_oi_match(cred, bss))
1968 continue;
1969 if (!ignore_bw &&
1970 cred_below_min_backhaul(wpa_s, cred, bss))
1971 continue;
1972 if (!ignore_bw &&
1973 cred_over_max_bss_load(wpa_s, cred, bss))
1974 continue;
1975 if (!ignore_bw &&
1976 cred_conn_capab_missing(wpa_s, cred, bss))
1977 continue;
1978 if (cred_excluded_ssid(cred, bss)) {
1979 if (excluded == NULL)
1980 continue;
1981 if (selected == NULL) {
1982 selected = cred;
1983 is_excluded = 1;
1984 }
1985 } else {
1986 if (selected == NULL || is_excluded ||
1987 cred_prio_cmp(selected, cred) < 0) {
1988 selected = cred;
1989 is_excluded = 0;
1990 }
1991 }
1992 }
1993 }
1994
1995 if (excluded)
1996 *excluded = is_excluded;
1997 #endif /* INTERWORKING_3GPP */
1998 return selected;
1999 }
2000
2001
2002 static struct wpa_cred * interworking_credentials_available_realm(
2003 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2004 int *excluded)
2005 {
2006 struct wpa_cred *cred, *selected = NULL;
2007 struct nai_realm *realm;
2008 u16 count, i;
2009 int is_excluded = 0;
2010
2011 if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
2012 return NULL;
2013
2014 if (wpa_s->conf->cred == NULL)
2015 return NULL;
2016
2017 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
2018 MACSTR, MAC2STR(bss->bssid));
2019 realm = nai_realm_parse(bss->anqp->nai_realm, &count);
2020 if (realm == NULL) {
2021 wpa_msg(wpa_s, MSG_DEBUG,
2022 "Interworking: Could not parse NAI Realm list from "
2023 MACSTR, MAC2STR(bss->bssid));
2024 return NULL;
2025 }
2026
2027 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2028 if (cred->realm == NULL)
2029 continue;
2030
2031 for (i = 0; i < count; i++) {
2032 if (!nai_realm_match(&realm[i], cred->realm))
2033 continue;
2034 if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2035 if (cred_no_required_oi_match(cred, bss))
2036 continue;
2037 if (!ignore_bw &&
2038 cred_below_min_backhaul(wpa_s, cred, bss))
2039 continue;
2040 if (!ignore_bw &&
2041 cred_over_max_bss_load(wpa_s, cred, bss))
2042 continue;
2043 if (!ignore_bw &&
2044 cred_conn_capab_missing(wpa_s, cred, bss))
2045 continue;
2046 if (cred_excluded_ssid(cred, bss)) {
2047 if (excluded == NULL)
2048 continue;
2049 if (selected == NULL) {
2050 selected = cred;
2051 is_excluded = 1;
2052 }
2053 } else {
2054 if (selected == NULL || is_excluded ||
2055 cred_prio_cmp(selected, cred) < 0)
2056 {
2057 selected = cred;
2058 is_excluded = 0;
2059 }
2060 }
2061 break;
2062 } else {
2063 wpa_msg(wpa_s, MSG_DEBUG,
2064 "Interworking: realm-find-eap returned false");
2065 }
2066 }
2067 }
2068
2069 nai_realm_free(realm, count);
2070
2071 if (excluded)
2072 *excluded = is_excluded;
2073
2074 return selected;
2075 }
2076
2077
2078 static struct wpa_cred * interworking_credentials_available_helper(
2079 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2080 int *excluded)
2081 {
2082 struct wpa_cred *cred, *cred2;
2083 int excluded1, excluded2 = 0;
2084
2085 if (disallowed_bssid(wpa_s, bss->bssid) ||
2086 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2087 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2088 MACSTR, MAC2STR(bss->bssid));
2089 return NULL;
2090 }
2091
2092 cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2093 &excluded1);
2094 cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2095 &excluded2);
2096 if (cred && cred2 &&
2097 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2098 cred = cred2;
2099 excluded1 = excluded2;
2100 }
2101 if (!cred) {
2102 cred = cred2;
2103 excluded1 = excluded2;
2104 }
2105
2106 cred2 = interworking_credentials_available_roaming_consortium(
2107 wpa_s, bss, ignore_bw, &excluded2);
2108 if (cred && cred2 &&
2109 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2110 cred = cred2;
2111 excluded1 = excluded2;
2112 }
2113 if (!cred) {
2114 cred = cred2;
2115 excluded1 = excluded2;
2116 }
2117
2118 if (excluded)
2119 *excluded = excluded1;
2120 return cred;
2121 }
2122
2123
2124 static struct wpa_cred * interworking_credentials_available(
2125 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
2126 {
2127 struct wpa_cred *cred;
2128
2129 if (excluded)
2130 *excluded = 0;
2131 cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2132 excluded);
2133 if (cred)
2134 return cred;
2135 return interworking_credentials_available_helper(wpa_s, bss, 1,
2136 excluded);
2137 }
2138
2139
2140 int domain_name_list_contains(struct wpabuf *domain_names,
2141 const char *domain, int exact_match)
2142 {
2143 const u8 *pos, *end;
2144 size_t len;
2145
2146 len = os_strlen(domain);
2147 pos = wpabuf_head(domain_names);
2148 end = pos + wpabuf_len(domain_names);
2149
2150 while (end - pos > 1) {
2151 u8 elen;
2152
2153 elen = *pos++;
2154 if (elen > end - pos)
2155 break;
2156
2157 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2158 pos, elen);
2159 if (elen == len &&
2160 os_strncasecmp(domain, (const char *) pos, len) == 0)
2161 return 1;
2162 if (!exact_match && elen > len && pos[elen - len - 1] == '.') {
2163 const char *ap = (const char *) pos;
2164 int offset = elen - len;
2165
2166 if (os_strncasecmp(domain, ap + offset, len) == 0)
2167 return 1;
2168 }
2169
2170 pos += elen;
2171 }
2172
2173 return 0;
2174 }
2175
2176
2177 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2178 struct wpa_cred *cred,
2179 struct wpabuf *domain_names)
2180 {
2181 size_t i;
2182 int ret = -1;
2183 #ifdef INTERWORKING_3GPP
2184 char nai[100], *realm;
2185
2186 char *imsi = NULL;
2187 int mnc_len = 0;
2188 if (cred->imsi)
2189 imsi = cred->imsi;
2190 #ifdef PCSC_FUNCS
2191 else if (cred->pcsc && wpa_s->scard) {
2192 if (interworking_pcsc_read_imsi(wpa_s) < 0)
2193 return -1;
2194 imsi = wpa_s->imsi;
2195 mnc_len = wpa_s->mnc_len;
2196 }
2197 #endif /* PCSC_FUNCS */
2198 #ifdef CONFIG_EAP_PROXY
2199 else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2200 imsi = wpa_s->imsi;
2201 mnc_len = wpa_s->mnc_len;
2202 }
2203 #endif /* CONFIG_EAP_PROXY */
2204 if (domain_names &&
2205 imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2206 realm = os_strchr(nai, '@');
2207 if (realm)
2208 realm++;
2209 wpa_msg(wpa_s, MSG_DEBUG,
2210 "Interworking: Search for match with SIM/USIM domain %s",
2211 realm);
2212 if (realm &&
2213 domain_name_list_contains(domain_names, realm, 1))
2214 return 1;
2215 if (realm)
2216 ret = 0;
2217 }
2218 #endif /* INTERWORKING_3GPP */
2219
2220 if (domain_names == NULL || cred->domain == NULL)
2221 return ret;
2222
2223 for (i = 0; i < cred->num_domain; i++) {
2224 wpa_msg(wpa_s, MSG_DEBUG,
2225 "Interworking: Search for match with home SP FQDN %s",
2226 cred->domain[i]);
2227 if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2228 return 1;
2229 }
2230
2231 return 0;
2232 }
2233
2234
2235 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2236 struct wpabuf *domain_names)
2237 {
2238 struct wpa_cred *cred;
2239
2240 if (domain_names == NULL || wpa_s->conf->cred == NULL)
2241 return -1;
2242
2243 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2244 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2245 if (res)
2246 return res;
2247 }
2248
2249 return 0;
2250 }
2251
2252
2253 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2254 {
2255 struct wpa_bss *bss;
2256 struct wpa_ssid *ssid;
2257
2258 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2259 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2260 if (wpas_network_disabled(wpa_s, ssid) ||
2261 ssid->mode != WPAS_MODE_INFRA)
2262 continue;
2263 if (ssid->ssid_len != bss->ssid_len ||
2264 os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2265 0)
2266 continue;
2267 /*
2268 * TODO: Consider more accurate matching of security
2269 * configuration similarly to what is done in events.c
2270 */
2271 return 1;
2272 }
2273 }
2274
2275 return 0;
2276 }
2277
2278
2279 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2280 struct roaming_partner *partner,
2281 struct wpabuf *domain_names)
2282 {
2283 wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2284 partner->fqdn, partner->exact_match, partner->priority,
2285 partner->country);
2286 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2287 wpabuf_head(domain_names),
2288 wpabuf_len(domain_names));
2289 if (!domain_name_list_contains(domain_names, partner->fqdn,
2290 partner->exact_match))
2291 return 0;
2292 /* TODO: match Country */
2293 return 1;
2294 }
2295
2296
2297 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2298 struct wpa_bss *bss)
2299 {
2300 size_t i;
2301
2302 if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
2303 wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2304 return 128; /* cannot check preference with domain name */
2305 }
2306
2307 if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2308 {
2309 wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2310 return 0; /* max preference for home SP network */
2311 }
2312
2313 for (i = 0; i < cred->num_roaming_partner; i++) {
2314 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2315 bss->anqp->domain_name)) {
2316 wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2317 cred->roaming_partner[i].priority);
2318 return cred->roaming_partner[i].priority;
2319 }
2320 }
2321
2322 wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2323 return 128;
2324 }
2325
2326
2327 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2328 struct wpa_bss *selected,
2329 struct wpa_cred *cred)
2330 {
2331 struct wpa_bss *bss;
2332 u8 best_prio, prio;
2333 struct wpa_cred *cred2;
2334
2335 /*
2336 * Check if any other BSS is operated by a more preferred roaming
2337 * partner.
2338 */
2339
2340 best_prio = roaming_prio(wpa_s, cred, selected);
2341 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2342 MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2343 cred->id);
2344
2345 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2346 if (bss == selected)
2347 continue;
2348 cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2349 if (!cred2)
2350 continue;
2351 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2352 continue;
2353 prio = roaming_prio(wpa_s, cred2, bss);
2354 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2355 MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2356 cred2->id);
2357 if (prio < best_prio) {
2358 int bh1, bh2, load1, load2, conn1, conn2;
2359 bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2360 load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2361 conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2362 bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2363 load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2364 conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2365 wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d new: %d %d %d",
2366 bh1, load1, conn1, bh2, load2, conn2);
2367 if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2368 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2369 best_prio = prio;
2370 selected = bss;
2371 }
2372 }
2373 }
2374
2375 return selected;
2376 }
2377
2378
2379 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2380 {
2381 struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2382 struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2383 unsigned int count = 0;
2384 const char *type;
2385 int res;
2386 struct wpa_cred *cred, *selected_cred = NULL;
2387 struct wpa_cred *selected_home_cred = NULL;
2388 struct wpa_cred *selected2_cred = NULL;
2389 struct wpa_cred *selected2_home_cred = NULL;
2390
2391 wpa_s->network_select = 0;
2392
2393 wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2394 wpa_s->auto_select);
2395 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2396 int excluded = 0;
2397 int bh, bss_load, conn_capab;
2398 cred = interworking_credentials_available(wpa_s, bss,
2399 &excluded);
2400 if (!cred)
2401 continue;
2402
2403 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2404 /*
2405 * We currently support only HS 2.0 networks and those
2406 * are required to use WPA2-Enterprise.
2407 */
2408 wpa_msg(wpa_s, MSG_DEBUG,
2409 "Interworking: Credential match with " MACSTR
2410 " but network does not use RSN",
2411 MAC2STR(bss->bssid));
2412 continue;
2413 }
2414 if (!excluded)
2415 count++;
2416 res = interworking_home_sp(wpa_s, bss->anqp ?
2417 bss->anqp->domain_name : NULL);
2418 if (res > 0)
2419 type = "home";
2420 else if (res == 0)
2421 type = "roaming";
2422 else
2423 type = "unknown";
2424 bh = cred_below_min_backhaul(wpa_s, cred, bss);
2425 bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2426 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2427 wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2428 excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2429 MAC2STR(bss->bssid), type,
2430 bh ? " below_min_backhaul=1" : "",
2431 bss_load ? " over_max_bss_load=1" : "",
2432 conn_capab ? " conn_capab_missing=1" : "",
2433 cred->id, cred->priority, cred->sp_priority);
2434 if (excluded)
2435 continue;
2436 if (wpa_s->auto_select ||
2437 (wpa_s->conf->auto_interworking &&
2438 wpa_s->auto_network_select)) {
2439 if (bh || bss_load || conn_capab) {
2440 if (selected2_cred == NULL ||
2441 cred_prio_cmp(cred, selected2_cred) > 0) {
2442 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2443 selected2 = bss;
2444 selected2_cred = cred;
2445 }
2446 if (res > 0 &&
2447 (selected2_home_cred == NULL ||
2448 cred_prio_cmp(cred, selected2_home_cred) >
2449 0)) {
2450 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2451 selected2_home = bss;
2452 selected2_home_cred = cred;
2453 }
2454 } else {
2455 if (selected_cred == NULL ||
2456 cred_prio_cmp(cred, selected_cred) > 0) {
2457 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2458 selected = bss;
2459 selected_cred = cred;
2460 }
2461 if (res > 0 &&
2462 (selected_home_cred == NULL ||
2463 cred_prio_cmp(cred, selected_home_cred) >
2464 0)) {
2465 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2466 selected_home = bss;
2467 selected_home_cred = cred;
2468 }
2469 }
2470 }
2471 }
2472
2473 if (selected_home && selected_home != selected &&
2474 selected_home_cred &&
2475 (selected_cred == NULL ||
2476 cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2477 /* Prefer network operated by the Home SP */
2478 wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2479 selected = selected_home;
2480 selected_cred = selected_home_cred;
2481 }
2482
2483 if (!selected) {
2484 if (selected2_home) {
2485 wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2486 selected = selected2_home;
2487 selected_cred = selected2_home_cred;
2488 } else if (selected2) {
2489 wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2490 selected = selected2;
2491 selected_cred = selected2_cred;
2492 }
2493 }
2494
2495 if (count == 0) {
2496 /*
2497 * No matching network was found based on configured
2498 * credentials. Check whether any of the enabled network blocks
2499 * have matching APs.
2500 */
2501 if (interworking_find_network_match(wpa_s)) {
2502 wpa_msg(wpa_s, MSG_DEBUG,
2503 "Interworking: Possible BSS match for enabled network configurations");
2504 if (wpa_s->auto_select) {
2505 interworking_reconnect(wpa_s);
2506 return;
2507 }
2508 }
2509
2510 if (wpa_s->auto_network_select) {
2511 wpa_msg(wpa_s, MSG_DEBUG,
2512 "Interworking: Continue scanning after ANQP fetch");
2513 wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2514 0);
2515 return;
2516 }
2517
2518 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2519 "with matching credentials found");
2520 if (wpa_s->wpa_state == WPA_SCANNING)
2521 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2522 }
2523
2524 if (selected) {
2525 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2526 MAC2STR(selected->bssid));
2527 selected = pick_best_roaming_partner(wpa_s, selected,
2528 selected_cred);
2529 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2530 " (after best roaming partner selection)",
2531 MAC2STR(selected->bssid));
2532 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2533 MAC2STR(selected->bssid));
2534 interworking_connect(wpa_s, selected, 0);
2535 } else if (wpa_s->wpa_state == WPA_SCANNING)
2536 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2537 }
2538
2539
2540 static struct wpa_bss_anqp *
2541 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2542 {
2543 struct wpa_bss *other;
2544
2545 if (is_zero_ether_addr(bss->hessid))
2546 return NULL; /* Cannot be in the same homegenous ESS */
2547
2548 dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2549 if (other == bss)
2550 continue;
2551 if (other->anqp == NULL)
2552 continue;
2553 if (other->anqp->roaming_consortium == NULL &&
2554 other->anqp->nai_realm == NULL &&
2555 other->anqp->anqp_3gpp == NULL &&
2556 other->anqp->domain_name == NULL)
2557 continue;
2558 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2559 continue;
2560 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2561 continue;
2562 if (bss->ssid_len != other->ssid_len ||
2563 os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2564 continue;
2565
2566 wpa_msg(wpa_s, MSG_DEBUG,
2567 "Interworking: Share ANQP data with already fetched BSSID "
2568 MACSTR " and " MACSTR,
2569 MAC2STR(other->bssid), MAC2STR(bss->bssid));
2570 other->anqp->users++;
2571 return other->anqp;
2572 }
2573
2574 return NULL;
2575 }
2576
2577
2578 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2579 {
2580 struct wpa_bss *bss;
2581 int found = 0;
2582 const u8 *ie;
2583
2584 wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2585 "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2586 wpa_s->fetch_anqp_in_progress,
2587 wpa_s->fetch_osu_icon_in_progress);
2588
2589 if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2590 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2591 return;
2592 }
2593
2594 #ifdef CONFIG_HS20
2595 if (wpa_s->fetch_osu_icon_in_progress) {
2596 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2597 hs20_next_osu_icon(wpa_s);
2598 return;
2599 }
2600 #endif /* CONFIG_HS20 */
2601
2602 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2603 if (!(bss->caps & IEEE80211_CAP_ESS))
2604 continue;
2605 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
2606 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
2607 continue; /* AP does not support Interworking */
2608 if (disallowed_bssid(wpa_s, bss->bssid) ||
2609 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2610 continue; /* Disallowed BSS */
2611
2612 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2613 if (bss->anqp == NULL) {
2614 bss->anqp = interworking_match_anqp_info(wpa_s,
2615 bss);
2616 if (bss->anqp) {
2617 /* Shared data already fetched */
2618 continue;
2619 }
2620 bss->anqp = wpa_bss_anqp_alloc();
2621 if (bss->anqp == NULL)
2622 break;
2623 }
2624 found++;
2625 bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2626 wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2627 MACSTR, MAC2STR(bss->bssid));
2628 interworking_anqp_send_req(wpa_s, bss);
2629 break;
2630 }
2631 }
2632
2633 if (found == 0) {
2634 #ifdef CONFIG_HS20
2635 if (wpa_s->fetch_osu_info) {
2636 if (wpa_s->num_prov_found == 0 &&
2637 wpa_s->fetch_osu_waiting_scan &&
2638 wpa_s->num_osu_scans < 3) {
2639 wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2640 hs20_start_osu_scan(wpa_s);
2641 return;
2642 }
2643 wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2644 hs20_osu_icon_fetch(wpa_s);
2645 return;
2646 }
2647 #endif /* CONFIG_HS20 */
2648 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2649 wpa_s->fetch_anqp_in_progress = 0;
2650 if (wpa_s->network_select)
2651 interworking_select_network(wpa_s);
2652 }
2653 }
2654
2655
2656 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2657 {
2658 struct wpa_bss *bss;
2659
2660 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2661 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2662
2663 wpa_s->fetch_anqp_in_progress = 1;
2664
2665 /*
2666 * Start actual ANQP operation from eloop call to make sure the loop
2667 * does not end up using excessive recursion.
2668 */
2669 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2670 }
2671
2672
2673 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2674 {
2675 if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2676 return 0;
2677
2678 wpa_s->network_select = 0;
2679 wpa_s->fetch_all_anqp = 1;
2680 wpa_s->fetch_osu_info = 0;
2681
2682 interworking_start_fetch_anqp(wpa_s);
2683
2684 return 0;
2685 }
2686
2687
2688 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2689 {
2690 if (!wpa_s->fetch_anqp_in_progress)
2691 return;
2692
2693 wpa_s->fetch_anqp_in_progress = 0;
2694 }
2695
2696
2697 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
2698 u16 info_ids[], size_t num_ids, u32 subtypes,
2699 u32 mbo_subtypes)
2700 {
2701 struct wpabuf *buf;
2702 struct wpabuf *extra_buf = NULL;
2703 int ret = 0;
2704 int freq;
2705 struct wpa_bss *bss;
2706 int res;
2707
2708 bss = wpa_bss_get_bssid(wpa_s, dst);
2709 if (!bss) {
2710 wpa_printf(MSG_WARNING,
2711 "ANQP: Cannot send query to unknown BSS "
2712 MACSTR, MAC2STR(dst));
2713 return -1;
2714 }
2715
2716 wpa_bss_anqp_unshare_alloc(bss);
2717 freq = bss->freq;
2718
2719 wpa_msg(wpa_s, MSG_DEBUG,
2720 "ANQP: Query Request to " MACSTR " for %u id(s)",
2721 MAC2STR(dst), (unsigned int) num_ids);
2722
2723 #ifdef CONFIG_HS20
2724 if (subtypes != 0) {
2725 extra_buf = wpabuf_alloc(100);
2726 if (extra_buf == NULL)
2727 return -1;
2728 hs20_put_anqp_req(subtypes, NULL, 0, extra_buf);
2729 }
2730 #endif /* CONFIG_HS20 */
2731
2732 #ifdef CONFIG_MBO
2733 if (mbo_subtypes) {
2734 struct wpabuf *mbo;
2735
2736 mbo = mbo_build_anqp_buf(wpa_s, bss, mbo_subtypes);
2737 if (mbo) {
2738 if (wpabuf_resize(&extra_buf, wpabuf_len(mbo))) {
2739 wpabuf_free(extra_buf);
2740 return -1;
2741 }
2742 wpabuf_put_buf(extra_buf, mbo);
2743 wpabuf_free(mbo);
2744 }
2745 }
2746 #endif /* CONFIG_MBO */
2747
2748 buf = anqp_build_req(info_ids, num_ids, extra_buf);
2749 wpabuf_free(extra_buf);
2750 if (buf == NULL)
2751 return -1;
2752
2753 res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
2754 if (res < 0) {
2755 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
2756 wpabuf_free(buf);
2757 ret = -1;
2758 } else {
2759 wpa_msg(wpa_s, MSG_DEBUG,
2760 "ANQP: Query started with dialog token %u", res);
2761 }
2762
2763 return ret;
2764 }
2765
2766
2767 static void anqp_add_extra(struct wpa_supplicant *wpa_s,
2768 struct wpa_bss_anqp *anqp, u16 info_id,
2769 const u8 *data, size_t slen)
2770 {
2771 struct wpa_bss_anqp_elem *tmp, *elem = NULL;
2772
2773 if (!anqp)
2774 return;
2775
2776 dl_list_for_each(tmp, &anqp->anqp_elems, struct wpa_bss_anqp_elem,
2777 list) {
2778 if (tmp->infoid == info_id) {
2779 elem = tmp;
2780 break;
2781 }
2782 }
2783
2784 if (!elem) {
2785 elem = os_zalloc(sizeof(*elem));
2786 if (!elem)
2787 return;
2788 elem->infoid = info_id;
2789 dl_list_add(&anqp->anqp_elems, &elem->list);
2790 } else {
2791 wpabuf_free(elem->payload);
2792 }
2793
2794 elem->payload = wpabuf_alloc_copy(data, slen);
2795 if (!elem->payload) {
2796 dl_list_del(&elem->list);
2797 os_free(elem);
2798 }
2799 }
2800
2801
2802 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2803 struct wpa_bss *bss, const u8 *sa,
2804 u16 info_id,
2805 const u8 *data, size_t slen,
2806 u8 dialog_token)
2807 {
2808 const u8 *pos = data;
2809 struct wpa_bss_anqp *anqp = NULL;
2810 #ifdef CONFIG_HS20
2811 u8 type;
2812 #endif /* CONFIG_HS20 */
2813
2814 if (bss)
2815 anqp = bss->anqp;
2816
2817 switch (info_id) {
2818 case ANQP_CAPABILITY_LIST:
2819 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2820 " ANQP Capability list", MAC2STR(sa));
2821 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list",
2822 pos, slen);
2823 if (anqp) {
2824 wpabuf_free(anqp->capability_list);
2825 anqp->capability_list = wpabuf_alloc_copy(pos, slen);
2826 }
2827 break;
2828 case ANQP_VENUE_NAME:
2829 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2830 " Venue Name", MAC2STR(sa));
2831 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2832 if (anqp) {
2833 wpabuf_free(anqp->venue_name);
2834 anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2835 }
2836 break;
2837 case ANQP_NETWORK_AUTH_TYPE:
2838 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2839 " Network Authentication Type information",
2840 MAC2STR(sa));
2841 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2842 "Type", pos, slen);
2843 if (anqp) {
2844 wpabuf_free(anqp->network_auth_type);
2845 anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2846 }
2847 break;
2848 case ANQP_ROAMING_CONSORTIUM:
2849 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2850 " Roaming Consortium list", MAC2STR(sa));
2851 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2852 pos, slen);
2853 if (anqp) {
2854 wpabuf_free(anqp->roaming_consortium);
2855 anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2856 }
2857 break;
2858 case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2859 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2860 " IP Address Type Availability information",
2861 MAC2STR(sa));
2862 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2863 pos, slen);
2864 if (anqp) {
2865 wpabuf_free(anqp->ip_addr_type_availability);
2866 anqp->ip_addr_type_availability =
2867 wpabuf_alloc_copy(pos, slen);
2868 }
2869 break;
2870 case ANQP_NAI_REALM:
2871 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2872 " NAI Realm list", MAC2STR(sa));
2873 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2874 if (anqp) {
2875 wpabuf_free(anqp->nai_realm);
2876 anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2877 }
2878 break;
2879 case ANQP_3GPP_CELLULAR_NETWORK:
2880 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2881 " 3GPP Cellular Network information", MAC2STR(sa));
2882 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2883 pos, slen);
2884 if (anqp) {
2885 wpabuf_free(anqp->anqp_3gpp);
2886 anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2887 }
2888 break;
2889 case ANQP_DOMAIN_NAME:
2890 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2891 " Domain Name list", MAC2STR(sa));
2892 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2893 if (anqp) {
2894 wpabuf_free(anqp->domain_name);
2895 anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2896 }
2897 break;
2898 #ifdef CONFIG_FILS
2899 case ANQP_FILS_REALM_INFO:
2900 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2901 " FILS Realm Information", MAC2STR(sa));
2902 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: FILS Realm Information",
2903 pos, slen);
2904 if (anqp) {
2905 wpabuf_free(anqp->fils_realm_info);
2906 anqp->fils_realm_info = wpabuf_alloc_copy(pos, slen);
2907 }
2908 break;
2909 #endif /* CONFIG_FILS */
2910 case ANQP_VENDOR_SPECIFIC:
2911 if (slen < 3)
2912 return;
2913
2914 switch (WPA_GET_BE24(pos)) {
2915 #ifdef CONFIG_HS20
2916 case OUI_WFA:
2917 pos += 3;
2918 slen -= 3;
2919
2920 if (slen < 1)
2921 return;
2922 type = *pos++;
2923 slen--;
2924
2925 switch (type) {
2926 case HS20_ANQP_OUI_TYPE:
2927 hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
2928 pos, slen,
2929 dialog_token);
2930 break;
2931 default:
2932 wpa_msg(wpa_s, MSG_DEBUG,
2933 "HS20: Unsupported ANQP vendor type %u",
2934 type);
2935 break;
2936 }
2937 break;
2938 #endif /* CONFIG_HS20 */
2939 default:
2940 wpa_msg(wpa_s, MSG_DEBUG,
2941 "Interworking: Unsupported vendor-specific ANQP OUI %06x",
2942 WPA_GET_BE24(pos));
2943 return;
2944 }
2945 break;
2946 default:
2947 wpa_msg(wpa_s, MSG_DEBUG,
2948 "Interworking: Unsupported ANQP Info ID %u", info_id);
2949 anqp_add_extra(wpa_s, anqp, info_id, data, slen);
2950 break;
2951 }
2952 }
2953
2954
2955 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2956 enum gas_query_result result,
2957 const struct wpabuf *adv_proto,
2958 const struct wpabuf *resp, u16 status_code)
2959 {
2960 struct wpa_supplicant *wpa_s = ctx;
2961 const u8 *pos;
2962 const u8 *end;
2963 u16 info_id;
2964 u16 slen;
2965 struct wpa_bss *bss = NULL, *tmp;
2966 const char *anqp_result = "SUCCESS";
2967
2968 wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
2969 " dialog_token=%u result=%d status_code=%u",
2970 MAC2STR(dst), dialog_token, result, status_code);
2971 if (result != GAS_QUERY_SUCCESS) {
2972 #ifdef CONFIG_HS20
2973 if (wpa_s->fetch_osu_icon_in_progress)
2974 hs20_icon_fetch_failed(wpa_s);
2975 #endif /* CONFIG_HS20 */
2976 anqp_result = "FAILURE";
2977 goto out;
2978 }
2979
2980 pos = wpabuf_head(adv_proto);
2981 if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2982 pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2983 wpa_msg(wpa_s, MSG_DEBUG,
2984 "ANQP: Unexpected Advertisement Protocol in response");
2985 #ifdef CONFIG_HS20
2986 if (wpa_s->fetch_osu_icon_in_progress)
2987 hs20_icon_fetch_failed(wpa_s);
2988 #endif /* CONFIG_HS20 */
2989 anqp_result = "INVALID_FRAME";
2990 goto out;
2991 }
2992
2993 /*
2994 * If possible, select the BSS entry based on which BSS entry was used
2995 * for the request. This can help in cases where multiple BSS entries
2996 * may exist for the same AP.
2997 */
2998 dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2999 if (tmp == wpa_s->interworking_gas_bss &&
3000 os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
3001 bss = tmp;
3002 break;
3003 }
3004 }
3005 if (bss == NULL)
3006 bss = wpa_bss_get_bssid(wpa_s, dst);
3007
3008 pos = wpabuf_head(resp);
3009 end = pos + wpabuf_len(resp);
3010
3011 while (pos < end) {
3012 unsigned int left = end - pos;
3013
3014 if (left < 4) {
3015 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element");
3016 anqp_result = "INVALID_FRAME";
3017 goto out_parse_done;
3018 }
3019 info_id = WPA_GET_LE16(pos);
3020 pos += 2;
3021 slen = WPA_GET_LE16(pos);
3022 pos += 2;
3023 left -= 4;
3024 if (left < slen) {
3025 wpa_msg(wpa_s, MSG_DEBUG,
3026 "ANQP: Invalid element length for Info ID %u",
3027 info_id);
3028 anqp_result = "INVALID_FRAME";
3029 goto out_parse_done;
3030 }
3031 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
3032 slen, dialog_token);
3033 pos += slen;
3034 }
3035
3036 out_parse_done:
3037 #ifdef CONFIG_HS20
3038 hs20_notify_parse_done(wpa_s);
3039 #endif /* CONFIG_HS20 */
3040 out:
3041 wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
3042 MAC2STR(dst), anqp_result);
3043 }
3044
3045
3046 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
3047 struct wpa_scan_results *scan_res)
3048 {
3049 wpa_msg(wpa_s, MSG_DEBUG,
3050 "Interworking: Scan results available - start ANQP fetch");
3051 interworking_start_fetch_anqp(wpa_s);
3052 }
3053
3054
3055 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
3056 int *freqs)
3057 {
3058 interworking_stop_fetch_anqp(wpa_s);
3059 wpa_s->network_select = 1;
3060 wpa_s->auto_network_select = 0;
3061 wpa_s->auto_select = !!auto_select;
3062 wpa_s->fetch_all_anqp = 0;
3063 wpa_s->fetch_osu_info = 0;
3064 wpa_msg(wpa_s, MSG_DEBUG,
3065 "Interworking: Start scan for network selection");
3066 wpa_s->scan_res_handler = interworking_scan_res_handler;
3067 wpa_s->normal_scans = 0;
3068 wpa_s->scan_req = MANUAL_SCAN_REQ;
3069 os_free(wpa_s->manual_scan_freqs);
3070 wpa_s->manual_scan_freqs = freqs;
3071 wpa_s->after_wps = 0;
3072 wpa_s->known_wps_freq = 0;
3073 wpa_supplicant_req_scan(wpa_s, 0, 0);
3074
3075 return 0;
3076 }
3077
3078
3079 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
3080 enum gas_query_result result,
3081 const struct wpabuf *adv_proto,
3082 const struct wpabuf *resp, u16 status_code)
3083 {
3084 struct wpa_supplicant *wpa_s = ctx;
3085 struct wpabuf *n;
3086
3087 wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
3088 " dialog_token=%d status_code=%d resp_len=%d",
3089 MAC2STR(addr), dialog_token, status_code,
3090 resp ? (int) wpabuf_len(resp) : -1);
3091 if (!resp)
3092 return;
3093
3094 n = wpabuf_dup(resp);
3095 if (n == NULL)
3096 return;
3097 wpabuf_free(wpa_s->prev_gas_resp);
3098 wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
3099 os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
3100 wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
3101 wpa_s->last_gas_resp = n;
3102 os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
3103 wpa_s->last_gas_dialog_token = dialog_token;
3104 }
3105
3106
3107 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
3108 const struct wpabuf *adv_proto,
3109 const struct wpabuf *query)
3110 {
3111 struct wpabuf *buf;
3112 int ret = 0;
3113 int freq;
3114 struct wpa_bss *bss;
3115 int res;
3116 size_t len;
3117 u8 query_resp_len_limit = 0;
3118
3119 freq = wpa_s->assoc_freq;
3120 bss = wpa_bss_get_bssid(wpa_s, dst);
3121 if (bss)
3122 freq = bss->freq;
3123 if (freq <= 0)
3124 return -1;
3125
3126 wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
3127 MAC2STR(dst), freq);
3128 wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
3129 wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
3130
3131 len = 3 + wpabuf_len(adv_proto) + 2;
3132 if (query)
3133 len += wpabuf_len(query);
3134 buf = gas_build_initial_req(0, len);
3135 if (buf == NULL)
3136 return -1;
3137
3138 /* Advertisement Protocol IE */
3139 wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3140 wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3141 wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3142 wpabuf_put_buf(buf, adv_proto);
3143
3144 /* GAS Query */
3145 if (query) {
3146 wpabuf_put_le16(buf, wpabuf_len(query));
3147 wpabuf_put_buf(buf, query);
3148 } else
3149 wpabuf_put_le16(buf, 0);
3150
3151 res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
3152 if (res < 0) {
3153 wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
3154 wpabuf_free(buf);
3155 ret = -1;
3156 } else
3157 wpa_msg(wpa_s, MSG_DEBUG,
3158 "GAS: Query started with dialog token %u", res);
3159
3160 return ret;
3161 }
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