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
cred_prio_cmp(const struct wpa_cred * a,const struct wpa_cred * b)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
interworking_reconnect(struct wpa_supplicant * wpa_s)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
anqp_build_req(u16 info_ids[],size_t num_ids,struct wpabuf * extra)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
interworking_anqp_resp_cb(void * ctx,const u8 * dst,u8 dialog_token,enum gas_query_result result,const struct wpabuf * adv_proto,const struct wpabuf * resp,u16 status_code)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
cred_with_roaming_consortium(struct wpa_supplicant * wpa_s)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->num_home_ois)
148 return 1;
149 if (cred->num_required_home_ois)
150 return 1;
151 if (cred->num_roaming_consortiums)
152 return 1;
153 }
154 return 0;
155 }
156
157
cred_with_3gpp(struct wpa_supplicant * wpa_s)158 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
159 {
160 struct wpa_cred *cred;
161
162 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
163 if (cred->pcsc || cred->imsi)
164 return 1;
165 }
166 return 0;
167 }
168
169
cred_with_nai_realm(struct wpa_supplicant * wpa_s)170 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
171 {
172 struct wpa_cred *cred;
173
174 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
175 if (cred->pcsc || cred->imsi)
176 continue;
177 if (!cred->eap_method)
178 return 1;
179 if (cred->realm)
180 return 1;
181 }
182 return 0;
183 }
184
185
cred_with_domain(struct wpa_supplicant * wpa_s)186 static int cred_with_domain(struct wpa_supplicant *wpa_s)
187 {
188 struct wpa_cred *cred;
189
190 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
191 if (cred->domain || cred->pcsc || cred->imsi ||
192 cred->roaming_partner)
193 return 1;
194 }
195 return 0;
196 }
197
198
199 #ifdef CONFIG_HS20
200
cred_with_min_backhaul(struct wpa_supplicant * wpa_s)201 static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s)
202 {
203 struct wpa_cred *cred;
204
205 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
206 if (cred->min_dl_bandwidth_home ||
207 cred->min_ul_bandwidth_home ||
208 cred->min_dl_bandwidth_roaming ||
209 cred->min_ul_bandwidth_roaming)
210 return 1;
211 }
212 return 0;
213 }
214
215
cred_with_conn_capab(struct wpa_supplicant * wpa_s)216 static int cred_with_conn_capab(struct wpa_supplicant *wpa_s)
217 {
218 struct wpa_cred *cred;
219
220 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
221 if (cred->num_req_conn_capab)
222 return 1;
223 }
224 return 0;
225 }
226
227 #endif /* CONFIG_HS20 */
228
229
additional_roaming_consortiums(struct wpa_bss * bss)230 static int additional_roaming_consortiums(struct wpa_bss *bss)
231 {
232 const u8 *ie;
233 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
234 if (ie == NULL || ie[1] == 0)
235 return 0;
236 return ie[2]; /* Number of ANQP OIs */
237 }
238
239
interworking_continue_anqp(void * eloop_ctx,void * sock_ctx)240 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
241 {
242 struct wpa_supplicant *wpa_s = eloop_ctx;
243 interworking_next_anqp_fetch(wpa_s);
244 }
245
246
interworking_anqp_send_req(struct wpa_supplicant * wpa_s,struct wpa_bss * bss)247 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
248 struct wpa_bss *bss)
249 {
250 struct wpabuf *buf;
251 int ret = 0;
252 int res;
253 u16 info_ids[8];
254 size_t num_info_ids = 0;
255 struct wpabuf *extra = NULL;
256 int all = wpa_s->fetch_all_anqp;
257
258 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
259 MAC2STR(bss->bssid));
260 wpa_s->interworking_gas_bss = bss;
261
262 info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
263 if (all) {
264 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
265 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
266 }
267 if (all || (cred_with_roaming_consortium(wpa_s) &&
268 additional_roaming_consortiums(bss)))
269 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
270 if (all)
271 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
272 if (all || cred_with_nai_realm(wpa_s))
273 info_ids[num_info_ids++] = ANQP_NAI_REALM;
274 if (all || cred_with_3gpp(wpa_s)) {
275 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
276 wpa_supplicant_scard_init(wpa_s, NULL);
277 }
278 if (all || cred_with_domain(wpa_s))
279 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
280 wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
281 (u8 *) info_ids, num_info_ids * 2);
282
283 #ifdef CONFIG_HS20
284 if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
285 u8 *len_pos;
286
287 extra = wpabuf_alloc(100);
288 if (!extra)
289 return -1;
290
291 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
292 wpabuf_put_be24(extra, OUI_WFA);
293 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
294 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
295 wpabuf_put_u8(extra, 0); /* Reserved */
296 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
297 if (all)
298 wpabuf_put_u8(extra,
299 HS20_STYPE_OPERATOR_FRIENDLY_NAME);
300 if (all || cred_with_min_backhaul(wpa_s))
301 wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
302 if (all || cred_with_conn_capab(wpa_s))
303 wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
304 if (all)
305 wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
306 if (all) {
307 wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST);
308 wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_NAI_LIST);
309 }
310 gas_anqp_set_element_len(extra, len_pos);
311 }
312 #endif /* CONFIG_HS20 */
313
314 buf = anqp_build_req(info_ids, num_info_ids, extra);
315 wpabuf_free(extra);
316 if (buf == NULL)
317 return -1;
318
319 res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, 0, 0, buf,
320 interworking_anqp_resp_cb, wpa_s);
321 if (res < 0) {
322 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
323 wpabuf_free(buf);
324 ret = -1;
325 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
326 NULL);
327 } else
328 wpa_msg(wpa_s, MSG_DEBUG,
329 "ANQP: Query started with dialog token %u", res);
330
331 return ret;
332 }
333
334
335 struct nai_realm_eap {
336 u8 method;
337 u8 inner_method;
338 enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
339 u8 cred_type;
340 u8 tunneled_cred_type;
341 };
342
343 struct nai_realm {
344 u8 encoding;
345 char *realm;
346 u8 eap_count;
347 struct nai_realm_eap *eap;
348 };
349
350
nai_realm_free(struct nai_realm * realms,u16 count)351 static void nai_realm_free(struct nai_realm *realms, u16 count)
352 {
353 u16 i;
354
355 if (realms == NULL)
356 return;
357 for (i = 0; i < count; i++) {
358 os_free(realms[i].eap);
359 os_free(realms[i].realm);
360 }
361 os_free(realms);
362 }
363
364
nai_realm_parse_eap(struct nai_realm_eap * e,const u8 * pos,const u8 * end)365 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
366 const u8 *end)
367 {
368 u8 elen, auth_count, a;
369 const u8 *e_end;
370
371 if (end - pos < 3) {
372 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
373 return NULL;
374 }
375
376 elen = *pos++;
377 if (elen > end - pos || elen < 2) {
378 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
379 return NULL;
380 }
381 e_end = pos + elen;
382 e->method = *pos++;
383 auth_count = *pos++;
384 wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
385 elen, e->method, auth_count);
386
387 for (a = 0; a < auth_count; a++) {
388 u8 id, len;
389
390 if (end - pos < 2) {
391 wpa_printf(MSG_DEBUG,
392 "No room for Authentication Parameter subfield header");
393 return NULL;
394 }
395
396 id = *pos++;
397 len = *pos++;
398 if (len > end - pos) {
399 wpa_printf(MSG_DEBUG,
400 "No room for Authentication Parameter subfield");
401 return NULL;
402 }
403
404 switch (id) {
405 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
406 if (len < 1)
407 break;
408 e->inner_non_eap = *pos;
409 if (e->method != EAP_TYPE_TTLS)
410 break;
411 switch (*pos) {
412 case NAI_REALM_INNER_NON_EAP_PAP:
413 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
414 break;
415 case NAI_REALM_INNER_NON_EAP_CHAP:
416 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
417 break;
418 case NAI_REALM_INNER_NON_EAP_MSCHAP:
419 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
420 break;
421 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
422 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
423 break;
424 default:
425 wpa_printf(MSG_DEBUG,
426 "Unsupported EAP-TTLS inner method %u",
427 *pos);
428 break;
429 }
430 break;
431 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
432 if (len < 1)
433 break;
434 e->inner_method = *pos;
435 wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
436 e->inner_method);
437 break;
438 case NAI_REALM_EAP_AUTH_CRED_TYPE:
439 if (len < 1)
440 break;
441 e->cred_type = *pos;
442 wpa_printf(MSG_DEBUG, "Credential Type: %u",
443 e->cred_type);
444 break;
445 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
446 if (len < 1)
447 break;
448 e->tunneled_cred_type = *pos;
449 wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
450 "Type: %u", e->tunneled_cred_type);
451 break;
452 default:
453 wpa_printf(MSG_DEBUG, "Unsupported Authentication "
454 "Parameter: id=%u len=%u", id, len);
455 wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
456 "Value", pos, len);
457 break;
458 }
459
460 pos += len;
461 }
462
463 return e_end;
464 }
465
466
nai_realm_parse_realm(struct nai_realm * r,const u8 * pos,const u8 * end)467 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
468 const u8 *end)
469 {
470 u16 len;
471 const u8 *f_end;
472 u8 realm_len, e;
473
474 if (end - pos < 4) {
475 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
476 "fixed fields");
477 return NULL;
478 }
479
480 len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
481 pos += 2;
482 if (len > end - pos || len < 3) {
483 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
484 "(len=%u; left=%u)",
485 len, (unsigned int) (end - pos));
486 return NULL;
487 }
488 f_end = pos + len;
489
490 r->encoding = *pos++;
491 realm_len = *pos++;
492 if (realm_len > f_end - pos) {
493 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
494 "(len=%u; left=%u)",
495 realm_len, (unsigned int) (f_end - pos));
496 return NULL;
497 }
498 wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
499 r->realm = dup_binstr(pos, realm_len);
500 if (r->realm == NULL)
501 return NULL;
502 pos += realm_len;
503
504 if (f_end - pos < 1) {
505 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
506 return NULL;
507 }
508 r->eap_count = *pos++;
509 wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
510 if (r->eap_count * 3 > f_end - pos) {
511 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
512 return NULL;
513 }
514 r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
515 if (r->eap == NULL)
516 return NULL;
517
518 for (e = 0; e < r->eap_count; e++) {
519 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
520 if (pos == NULL)
521 return NULL;
522 }
523
524 return f_end;
525 }
526
527
nai_realm_parse(struct wpabuf * anqp,u16 * count)528 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
529 {
530 struct nai_realm *realm;
531 const u8 *pos, *end;
532 u16 i, num;
533 size_t left;
534
535 if (anqp == NULL)
536 return NULL;
537 left = wpabuf_len(anqp);
538 if (left < 2)
539 return NULL;
540
541 pos = wpabuf_head_u8(anqp);
542 end = pos + left;
543 num = WPA_GET_LE16(pos);
544 wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
545 pos += 2;
546 left -= 2;
547
548 if (num > left / 5) {
549 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
550 "enough data (%u octets) for that many realms",
551 num, (unsigned int) left);
552 return NULL;
553 }
554
555 realm = os_calloc(num, sizeof(struct nai_realm));
556 if (realm == NULL)
557 return NULL;
558
559 for (i = 0; i < num; i++) {
560 pos = nai_realm_parse_realm(&realm[i], pos, end);
561 if (pos == NULL) {
562 nai_realm_free(realm, num);
563 return NULL;
564 }
565 }
566
567 *count = num;
568 return realm;
569 }
570
571
nai_realm_match(struct nai_realm * realm,const char * home_realm)572 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
573 {
574 char *tmp, *pos, *end;
575 int match = 0;
576
577 if (realm->realm == NULL || home_realm == NULL)
578 return 0;
579
580 if (os_strchr(realm->realm, ';') == NULL)
581 return os_strcasecmp(realm->realm, home_realm) == 0;
582
583 tmp = os_strdup(realm->realm);
584 if (tmp == NULL)
585 return 0;
586
587 pos = tmp;
588 while (*pos) {
589 end = os_strchr(pos, ';');
590 if (end)
591 *end = '\0';
592 if (os_strcasecmp(pos, home_realm) == 0) {
593 match = 1;
594 break;
595 }
596 if (end == NULL)
597 break;
598 pos = end + 1;
599 }
600
601 os_free(tmp);
602
603 return match;
604 }
605
606
nai_realm_cred_username(struct wpa_supplicant * wpa_s,struct nai_realm_eap * eap)607 static int nai_realm_cred_username(struct wpa_supplicant *wpa_s,
608 struct nai_realm_eap *eap)
609 {
610 if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
611 wpa_msg(wpa_s, MSG_DEBUG,
612 "nai-realm-cred-username: EAP method not supported: %d",
613 eap->method);
614 return 0; /* method not supported */
615 }
616
617 if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
618 eap->method != EAP_TYPE_FAST) {
619 /* Only tunneled methods with username/password supported */
620 wpa_msg(wpa_s, MSG_DEBUG,
621 "nai-realm-cred-username: Method: %d is not TTLS, PEAP, or FAST",
622 eap->method);
623 return 0;
624 }
625
626 if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) {
627 if (eap->inner_method &&
628 eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
629 wpa_msg(wpa_s, MSG_DEBUG,
630 "nai-realm-cred-username: PEAP/FAST: Inner method not supported: %d",
631 eap->inner_method);
632 return 0;
633 }
634 if (!eap->inner_method &&
635 eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) {
636 wpa_msg(wpa_s, MSG_DEBUG,
637 "nai-realm-cred-username: MSCHAPv2 not supported");
638 return 0;
639 }
640 }
641
642 if (eap->method == EAP_TYPE_TTLS) {
643 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
644 return 1; /* Assume TTLS/MSCHAPv2 is used */
645 if (eap->inner_method &&
646 eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
647 wpa_msg(wpa_s, MSG_DEBUG,
648 "nai-realm-cred-username: TTLS, but inner not supported: %d",
649 eap->inner_method);
650 return 0;
651 }
652 if (eap->inner_non_eap &&
653 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
654 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
655 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
656 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) {
657 wpa_msg(wpa_s, MSG_DEBUG,
658 "nai-realm-cred-username: TTLS, inner-non-eap not supported: %d",
659 eap->inner_non_eap);
660 return 0;
661 }
662 }
663
664 if (eap->inner_method &&
665 eap->inner_method != EAP_TYPE_GTC &&
666 eap->inner_method != EAP_TYPE_MSCHAPV2) {
667 wpa_msg(wpa_s, MSG_DEBUG,
668 "nai-realm-cred-username: inner-method not GTC or MSCHAPv2: %d",
669 eap->inner_method);
670 return 0;
671 }
672
673 return 1;
674 }
675
676
nai_realm_cred_cert(struct wpa_supplicant * wpa_s,struct nai_realm_eap * eap)677 static int nai_realm_cred_cert(struct wpa_supplicant *wpa_s,
678 struct nai_realm_eap *eap)
679 {
680 if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
681 wpa_msg(wpa_s, MSG_DEBUG,
682 "nai-realm-cred-cert: Method not supported: %d",
683 eap->method);
684 return 0; /* method not supported */
685 }
686
687 if (eap->method != EAP_TYPE_TLS) {
688 /* Only EAP-TLS supported for credential authentication */
689 wpa_msg(wpa_s, MSG_DEBUG,
690 "nai-realm-cred-cert: Method not TLS: %d",
691 eap->method);
692 return 0;
693 }
694
695 return 1;
696 }
697
698
nai_realm_find_eap(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct nai_realm * realm)699 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s,
700 struct wpa_cred *cred,
701 struct nai_realm *realm)
702 {
703 u8 e;
704
705 if (cred->username == NULL ||
706 cred->username[0] == '\0' ||
707 ((cred->password == NULL ||
708 cred->password[0] == '\0') &&
709 (cred->private_key == NULL ||
710 cred->private_key[0] == '\0') &&
711 (!cred->key_id || cred->key_id[0] == '\0'))) {
712 wpa_msg(wpa_s, MSG_DEBUG,
713 "nai-realm-find-eap: incomplete cred info: username: %s password: %s private_key: %s key_id: %s",
714 cred->username ? cred->username : "NULL",
715 cred->password ? cred->password : "NULL",
716 cred->private_key ? cred->private_key : "NULL",
717 cred->key_id ? cred->key_id : "NULL");
718 return NULL;
719 }
720
721 for (e = 0; e < realm->eap_count; e++) {
722 struct nai_realm_eap *eap = &realm->eap[e];
723 if (cred->password && cred->password[0] &&
724 nai_realm_cred_username(wpa_s, eap))
725 return eap;
726 if (((cred->private_key && cred->private_key[0]) ||
727 (cred->key_id && cred->key_id[0])) &&
728 nai_realm_cred_cert(wpa_s, eap))
729 return eap;
730 }
731
732 return NULL;
733 }
734
735
736 #ifdef INTERWORKING_3GPP
737
plmn_id_match(struct wpabuf * anqp,const char * imsi,int mnc_len)738 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
739 {
740 u8 plmn[3], plmn2[3];
741 const u8 *pos, *end;
742 u8 udhl;
743
744 /*
745 * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
746 * operator is allowed to include only two digits of the MNC, so allow
747 * matches based on both two and three digit MNC assumptions. Since some
748 * SIM/USIM cards may not expose MNC length conveniently, we may be
749 * provided the default MNC length 3 here and as such, checking with MNC
750 * length 2 is justifiable even though 3GPP TS 24.234 does not mention
751 * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
752 * with otherwise matching values would not be good idea in general, so
753 * this should not result in selecting incorrect networks.
754 */
755 /* Match with 3 digit MNC */
756 plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
757 plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
758 plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
759 /* Match with 2 digit MNC */
760 plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
761 plmn2[1] = (imsi[2] - '0') | 0xf0;
762 plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
763
764 if (anqp == NULL)
765 return 0;
766 pos = wpabuf_head_u8(anqp);
767 end = pos + wpabuf_len(anqp);
768 if (end - pos < 2)
769 return 0;
770 if (*pos != 0) {
771 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
772 return 0;
773 }
774 pos++;
775 udhl = *pos++;
776 if (udhl > end - pos) {
777 wpa_printf(MSG_DEBUG, "Invalid UDHL");
778 return 0;
779 }
780 end = pos + udhl;
781
782 wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
783 plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
784 imsi, mnc_len);
785
786 while (end - pos >= 2) {
787 u8 iei, len;
788 const u8 *l_end;
789 iei = *pos++;
790 len = *pos++ & 0x7f;
791 if (len > end - pos)
792 break;
793 l_end = pos + len;
794
795 if (iei == 0 && len > 0) {
796 /* PLMN List */
797 u8 num, i;
798 wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
799 pos, len);
800 num = *pos++;
801 for (i = 0; i < num; i++) {
802 if (l_end - pos < 3)
803 break;
804 if (os_memcmp(pos, plmn, 3) == 0 ||
805 os_memcmp(pos, plmn2, 3) == 0)
806 return 1; /* Found matching PLMN */
807 pos += 3;
808 }
809 } else {
810 wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
811 pos, len);
812 }
813
814 pos = l_end;
815 }
816
817 return 0;
818 }
819
820
build_root_nai(char * nai,size_t nai_len,const char * imsi,size_t mnc_len,char prefix)821 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
822 size_t mnc_len, char prefix)
823 {
824 const char *sep, *msin;
825 char *end, *pos;
826 size_t msin_len, plmn_len;
827
828 /*
829 * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
830 * Root NAI:
831 * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
832 * <MNC> is zero-padded to three digits in case two-digit MNC is used
833 */
834
835 if (imsi == NULL || os_strlen(imsi) > 16) {
836 wpa_printf(MSG_DEBUG, "No valid IMSI available");
837 return -1;
838 }
839 sep = os_strchr(imsi, '-');
840 if (sep) {
841 plmn_len = sep - imsi;
842 msin = sep + 1;
843 } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
844 plmn_len = 3 + mnc_len;
845 msin = imsi + plmn_len;
846 } else
847 return -1;
848 if (plmn_len != 5 && plmn_len != 6)
849 return -1;
850 msin_len = os_strlen(msin);
851
852 pos = nai;
853 end = nai + nai_len;
854 if (prefix)
855 *pos++ = prefix;
856 os_memcpy(pos, imsi, plmn_len);
857 pos += plmn_len;
858 os_memcpy(pos, msin, msin_len);
859 pos += msin_len;
860 pos += os_snprintf(pos, end - pos, "@wlan.mnc");
861 if (plmn_len == 5) {
862 *pos++ = '0';
863 *pos++ = imsi[3];
864 *pos++ = imsi[4];
865 } else {
866 *pos++ = imsi[3];
867 *pos++ = imsi[4];
868 *pos++ = imsi[5];
869 }
870 os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
871 imsi[0], imsi[1], imsi[2]);
872
873 return 0;
874 }
875
876
set_root_nai(struct wpa_ssid * ssid,const char * imsi,char prefix)877 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
878 {
879 char nai[100];
880 if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
881 return -1;
882 return wpa_config_set_quoted(ssid, "identity", nai);
883 }
884
885 #endif /* INTERWORKING_3GPP */
886
887
already_connected(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpa_bss * bss)888 static int already_connected(struct wpa_supplicant *wpa_s,
889 struct wpa_cred *cred, struct wpa_bss *bss)
890 {
891 struct wpa_ssid *ssid, *sel_ssid;
892 struct wpa_bss *selected;
893
894 if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL)
895 return 0;
896
897 ssid = wpa_s->current_ssid;
898 if (ssid->parent_cred != cred)
899 return 0;
900
901 if (ssid->ssid_len != bss->ssid_len ||
902 os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
903 return 0;
904
905 sel_ssid = NULL;
906 selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid);
907 if (selected && sel_ssid && sel_ssid->priority > ssid->priority)
908 return 0; /* higher priority network in scan results */
909
910 return 1;
911 }
912
913
remove_duplicate_network(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpa_bss * bss)914 static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
915 struct wpa_cred *cred,
916 struct wpa_bss *bss)
917 {
918 struct wpa_ssid *ssid;
919
920 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
921 if (ssid->parent_cred != cred)
922 continue;
923 if (ssid->ssid_len != bss->ssid_len ||
924 os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
925 continue;
926
927 break;
928 }
929
930 if (ssid == NULL)
931 return;
932
933 wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
934
935 if (ssid == wpa_s->current_ssid) {
936 wpa_sm_set_config(wpa_s->wpa, NULL);
937 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
938 wpa_s->own_disconnect_req = 1;
939 wpa_supplicant_deauthenticate(wpa_s,
940 WLAN_REASON_DEAUTH_LEAVING);
941 }
942
943 wpas_notify_network_removed(wpa_s, ssid);
944 wpa_config_remove_network(wpa_s->conf, ssid->id);
945 }
946
947
interworking_set_hs20_params(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid)948 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
949 struct wpa_ssid *ssid)
950 {
951 const char *key_mgmt = NULL;
952 #ifdef CONFIG_IEEE80211R
953 int res;
954 struct wpa_driver_capa capa;
955
956 res = wpa_drv_get_capa(wpa_s, &capa);
957 if (res == 0 && capa.key_mgmt_iftype[WPA_IF_STATION] &
958 WPA_DRIVER_CAPA_KEY_MGMT_FT) {
959 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
960 "WPA-EAP WPA-EAP-SHA256 FT-EAP" :
961 "WPA-EAP FT-EAP";
962 }
963 #endif /* CONFIG_IEEE80211R */
964
965 if (!key_mgmt)
966 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
967 "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP";
968 if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0 ||
969 wpa_config_set(ssid, "proto", "RSN", 0) < 0 ||
970 wpa_config_set(ssid, "ieee80211w",
971 wpa_s->conf->pmf == MGMT_FRAME_PROTECTION_REQUIRED ?
972 "2" : "1", 0) < 0 ||
973 wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
974 return -1;
975 return 0;
976 }
977
978
interworking_connect_3gpp(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpa_bss * bss,int only_add)979 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
980 struct wpa_cred *cred,
981 struct wpa_bss *bss, int only_add)
982 {
983 #ifdef INTERWORKING_3GPP
984 struct wpa_ssid *ssid;
985 int eap_type;
986 int res;
987 char prefix;
988
989 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
990 return -1;
991
992 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
993 " (3GPP)", MAC2STR(bss->bssid));
994
995 if (already_connected(wpa_s, cred, bss)) {
996 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
997 MAC2STR(bss->bssid));
998 return wpa_s->current_ssid->id;
999 }
1000
1001 remove_duplicate_network(wpa_s, cred, bss);
1002
1003 ssid = wpa_config_add_network(wpa_s->conf);
1004 if (ssid == NULL)
1005 return -1;
1006 ssid->parent_cred = cred;
1007
1008 wpas_notify_network_added(wpa_s, ssid);
1009 wpa_config_set_network_defaults(ssid);
1010 ssid->priority = cred->priority;
1011 ssid->temporary = 1;
1012 ssid->ssid = os_zalloc(bss->ssid_len + 1);
1013 if (ssid->ssid == NULL)
1014 goto fail;
1015 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1016 ssid->ssid_len = bss->ssid_len;
1017 ssid->eap.sim_num = cred->sim_num;
1018
1019 if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1020 goto fail;
1021
1022 eap_type = EAP_TYPE_SIM;
1023 if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
1024 eap_type = EAP_TYPE_AKA;
1025 if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
1026 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
1027 cred->eap_method[0].method == EAP_TYPE_AKA ||
1028 cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
1029 eap_type = cred->eap_method[0].method;
1030 }
1031
1032 switch (eap_type) {
1033 case EAP_TYPE_SIM:
1034 prefix = '1';
1035 res = wpa_config_set(ssid, "eap", "SIM", 0);
1036 break;
1037 case EAP_TYPE_AKA:
1038 prefix = '0';
1039 res = wpa_config_set(ssid, "eap", "AKA", 0);
1040 break;
1041 case EAP_TYPE_AKA_PRIME:
1042 prefix = '6';
1043 res = wpa_config_set(ssid, "eap", "AKA'", 0);
1044 break;
1045 default:
1046 res = -1;
1047 break;
1048 }
1049 if (res < 0) {
1050 wpa_msg(wpa_s, MSG_DEBUG,
1051 "Selected EAP method (%d) not supported", eap_type);
1052 goto fail;
1053 }
1054
1055 if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
1056 wpa_msg(wpa_s, MSG_DEBUG, "Failed to set Root NAI");
1057 goto fail;
1058 }
1059
1060 if (cred->milenage && cred->milenage[0]) {
1061 if (wpa_config_set_quoted(ssid, "password",
1062 cred->milenage) < 0)
1063 goto fail;
1064 } else if (cred->pcsc) {
1065 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
1066 goto fail;
1067 if (wpa_s->conf->pcsc_pin &&
1068 wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
1069 < 0)
1070 goto fail;
1071 }
1072
1073 if (cred->imsi_privacy_cert && cred->imsi_privacy_cert[0]) {
1074 if (wpa_config_set_quoted(ssid, "imsi_privacy_cert",
1075 cred->imsi_privacy_cert) < 0)
1076 goto fail;
1077 }
1078
1079 if (cred->imsi_privacy_attr && cred->imsi_privacy_attr[0]) {
1080 if (wpa_config_set_quoted(ssid, "imsi_privacy_attr",
1081 cred->imsi_privacy_attr) < 0)
1082 goto fail;
1083 }
1084
1085 if (cred->strict_conservative_peer_mode) {
1086 if (wpa_config_set_quoted(ssid, "strict_conservative_peer_mode",
1087 "1") < 0)
1088 goto fail;
1089 }
1090
1091 wpa_s->next_ssid = ssid;
1092 wpa_config_update_prio_list(wpa_s->conf);
1093 if (!only_add)
1094 interworking_reconnect(wpa_s);
1095
1096 return ssid->id;
1097
1098 fail:
1099 wpas_notify_network_removed(wpa_s, ssid);
1100 wpa_config_remove_network(wpa_s->conf, ssid->id);
1101 #endif /* INTERWORKING_3GPP */
1102 return -1;
1103 }
1104
1105
oi_element_match(const u8 * ie,const u8 * oi,size_t oi_len)1106 static int oi_element_match(const u8 *ie, const u8 *oi, size_t oi_len)
1107 {
1108 const u8 *pos, *end;
1109 u8 lens;
1110
1111 if (ie == NULL)
1112 return 0;
1113
1114 pos = ie + 2;
1115 end = ie + 2 + ie[1];
1116
1117 /* Roaming Consortium element:
1118 * Number of ANQP OIs
1119 * OI #1 and #2 lengths
1120 * OI #1, [OI #2], [OI #3]
1121 */
1122
1123 if (end - pos < 2)
1124 return 0;
1125
1126 pos++; /* skip Number of ANQP OIs */
1127 lens = *pos++;
1128 if ((lens & 0x0f) + (lens >> 4) > end - pos)
1129 return 0;
1130
1131 if ((lens & 0x0f) == oi_len && os_memcmp(pos, oi, oi_len) == 0)
1132 return 1;
1133 pos += lens & 0x0f;
1134
1135 if ((lens >> 4) == oi_len && os_memcmp(pos, oi, oi_len) == 0)
1136 return 1;
1137 pos += lens >> 4;
1138
1139 if (pos < end && (size_t) (end - pos) == oi_len &&
1140 os_memcmp(pos, oi, oi_len) == 0)
1141 return 1;
1142
1143 return 0;
1144 }
1145
1146
oi_anqp_match(const struct wpabuf * anqp,const u8 * oi,size_t oi_len)1147 static int oi_anqp_match(const struct wpabuf *anqp, const u8 *oi,
1148 size_t oi_len)
1149 {
1150 const u8 *pos, *end;
1151 u8 len;
1152
1153 if (anqp == NULL)
1154 return 0;
1155
1156 pos = wpabuf_head(anqp);
1157 end = pos + wpabuf_len(anqp);
1158
1159 /* Set of <OI Length, OI> duples */
1160 while (pos < end) {
1161 len = *pos++;
1162 if (len > end - pos)
1163 break;
1164 if (len == oi_len && os_memcmp(pos, oi, oi_len) == 0)
1165 return 1;
1166 pos += len;
1167 }
1168
1169 return 0;
1170 }
1171
1172
oi_match(const u8 * ie,const struct wpabuf * anqp,const u8 * oi,size_t oi_len)1173 static int oi_match(const u8 *ie, const struct wpabuf *anqp,
1174 const u8 *oi, size_t oi_len)
1175 {
1176 return oi_element_match(ie, oi, oi_len) ||
1177 oi_anqp_match(anqp, oi, oi_len);
1178 }
1179
1180
cred_home_ois_match(const u8 * ie,const struct wpabuf * anqp,const struct wpa_cred * cred)1181 static int cred_home_ois_match(const u8 *ie, const struct wpabuf *anqp,
1182 const struct wpa_cred *cred) {
1183 unsigned int i;
1184
1185 /* There's a match if at least one of the home OI matches. */
1186 for (i = 0; i < cred->num_home_ois; i++) {
1187 if (oi_match(ie, anqp, cred->home_ois[i],
1188 cred->home_ois_len[i]))
1189 return 1;
1190 }
1191
1192 return 0;
1193 }
1194
1195
cred_roaming_consortiums_match(const u8 * ie,const struct wpabuf * anqp,const struct wpa_cred * cred)1196 static int cred_roaming_consortiums_match(const u8 *ie,
1197 const struct wpabuf *anqp,
1198 const struct wpa_cred *cred)
1199 {
1200 unsigned int i;
1201
1202 for (i = 0; i < cred->num_roaming_consortiums; i++) {
1203 if (oi_match(ie, anqp, cred->roaming_consortiums[i],
1204 cred->roaming_consortiums_len[i]))
1205 return 1;
1206 }
1207
1208 return 0;
1209 }
1210
1211
cred_no_required_oi_match(struct wpa_cred * cred,struct wpa_bss * bss)1212 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1213 {
1214 const u8 *ie;
1215 unsigned int i;
1216
1217 if (cred->num_required_home_ois == 0)
1218 return 0;
1219
1220 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1221
1222 if (ie == NULL &&
1223 (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1224 return 1;
1225
1226 /* According to Passpoint specification, there must be a match for
1227 * each required home OI provided. */
1228 for (i = 0; i < cred->num_required_home_ois; i++) {
1229 if (!oi_match(ie, bss->anqp ?
1230 bss->anqp->roaming_consortium : NULL,
1231 cred->required_home_ois[i],
1232 cred->required_home_ois_len[i]))
1233 return 1;
1234 }
1235 return 0;
1236 }
1237
1238
cred_excluded_ssid(struct wpa_cred * cred,struct wpa_bss * bss)1239 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1240 {
1241 size_t i;
1242
1243 if (!cred->excluded_ssid)
1244 return 0;
1245
1246 for (i = 0; i < cred->num_excluded_ssid; i++) {
1247 struct excluded_ssid *e = &cred->excluded_ssid[i];
1248 if (bss->ssid_len == e->ssid_len &&
1249 os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1250 return 1;
1251 }
1252
1253 return 0;
1254 }
1255
1256
cred_below_min_backhaul(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpa_bss * bss)1257 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
1258 struct wpa_cred *cred, struct wpa_bss *bss)
1259 {
1260 #ifdef CONFIG_HS20
1261 int res;
1262 unsigned int dl_bandwidth, ul_bandwidth;
1263 const u8 *wan;
1264 u8 wan_info, dl_load, ul_load;
1265 u16 lmd;
1266 u32 ul_speed, dl_speed;
1267
1268 if (!cred->min_dl_bandwidth_home &&
1269 !cred->min_ul_bandwidth_home &&
1270 !cred->min_dl_bandwidth_roaming &&
1271 !cred->min_ul_bandwidth_roaming)
1272 return 0; /* No bandwidth constraint specified */
1273
1274 if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL)
1275 return 0; /* No WAN Metrics known - ignore constraint */
1276
1277 wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
1278 wan_info = wan[0];
1279 if (wan_info & BIT(3))
1280 return 1; /* WAN link at capacity */
1281 lmd = WPA_GET_LE16(wan + 11);
1282 if (lmd == 0)
1283 return 0; /* Downlink/Uplink Load was not measured */
1284 dl_speed = WPA_GET_LE32(wan + 1);
1285 ul_speed = WPA_GET_LE32(wan + 5);
1286 dl_load = wan[9];
1287 ul_load = wan[10];
1288
1289 if (dl_speed >= 0xffffff)
1290 dl_bandwidth = dl_speed / 255 * (255 - dl_load);
1291 else
1292 dl_bandwidth = dl_speed * (255 - dl_load) / 255;
1293
1294 if (ul_speed >= 0xffffff)
1295 ul_bandwidth = ul_speed / 255 * (255 - ul_load);
1296 else
1297 ul_bandwidth = ul_speed * (255 - ul_load) / 255;
1298
1299 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1300 bss->anqp->domain_name : NULL);
1301 if (res > 0) {
1302 if (cred->min_dl_bandwidth_home > dl_bandwidth)
1303 return 1;
1304 if (cred->min_ul_bandwidth_home > ul_bandwidth)
1305 return 1;
1306 } else {
1307 if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
1308 return 1;
1309 if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
1310 return 1;
1311 }
1312 #endif /* CONFIG_HS20 */
1313
1314 return 0;
1315 }
1316
1317
cred_over_max_bss_load(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpa_bss * bss)1318 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
1319 struct wpa_cred *cred, struct wpa_bss *bss)
1320 {
1321 const u8 *ie;
1322 int res;
1323
1324 if (!cred->max_bss_load)
1325 return 0; /* No BSS Load constraint specified */
1326
1327 ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
1328 if (ie == NULL || ie[1] < 3)
1329 return 0; /* No BSS Load advertised */
1330
1331 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1332 bss->anqp->domain_name : NULL);
1333 if (res <= 0)
1334 return 0; /* Not a home network */
1335
1336 return ie[4] > cred->max_bss_load;
1337 }
1338
1339
1340 #ifdef CONFIG_HS20
1341
has_proto_match(const u8 * pos,const u8 * end,u8 proto)1342 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto)
1343 {
1344 while (end - pos >= 4) {
1345 if (pos[0] == proto && pos[3] == 1 /* Open */)
1346 return 1;
1347 pos += 4;
1348 }
1349
1350 return 0;
1351 }
1352
1353
has_proto_port_match(const u8 * pos,const u8 * end,u8 proto,u16 port)1354 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto,
1355 u16 port)
1356 {
1357 while (end - pos >= 4) {
1358 if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
1359 pos[3] == 1 /* Open */)
1360 return 1;
1361 pos += 4;
1362 }
1363
1364 return 0;
1365 }
1366
1367 #endif /* CONFIG_HS20 */
1368
1369
cred_conn_capab_missing(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpa_bss * bss)1370 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
1371 struct wpa_cred *cred, struct wpa_bss *bss)
1372 {
1373 #ifdef CONFIG_HS20
1374 int res;
1375 const u8 *capab, *end;
1376 unsigned int i, j;
1377 int *ports;
1378
1379 if (!cred->num_req_conn_capab)
1380 return 0; /* No connection capability constraint specified */
1381
1382 if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL)
1383 return 0; /* No Connection Capability known - ignore constraint
1384 */
1385
1386 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1387 bss->anqp->domain_name : NULL);
1388 if (res > 0)
1389 return 0; /* No constraint in home network */
1390
1391 capab = wpabuf_head(bss->anqp->hs20_connection_capability);
1392 end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
1393
1394 for (i = 0; i < cred->num_req_conn_capab; i++) {
1395 ports = cred->req_conn_capab_port[i];
1396 if (!ports) {
1397 if (!has_proto_match(capab, end,
1398 cred->req_conn_capab_proto[i]))
1399 return 1;
1400 } else {
1401 for (j = 0; ports[j] > -1; j++) {
1402 if (!has_proto_port_match(
1403 capab, end,
1404 cred->req_conn_capab_proto[i],
1405 ports[j]))
1406 return 1;
1407 }
1408 }
1409 }
1410 #endif /* CONFIG_HS20 */
1411
1412 return 0;
1413 }
1414
1415
interworking_credentials_available_roaming_consortium(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,int ignore_bw,int * excluded)1416 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1417 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1418 int *excluded)
1419 {
1420 struct wpa_cred *cred, *selected = NULL;
1421 const u8 *ie;
1422 const struct wpabuf *anqp;
1423 int is_excluded = 0;
1424
1425 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1426 anqp = bss->anqp ? bss->anqp->roaming_consortium : NULL;
1427
1428 if (!ie && !anqp)
1429 return NULL;
1430
1431 if (wpa_s->conf->cred == NULL)
1432 return NULL;
1433
1434 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1435 if (cred->num_home_ois == 0 &&
1436 cred->num_required_home_ois == 0 &&
1437 cred->num_roaming_consortiums == 0)
1438 continue;
1439
1440 if (!cred->eap_method)
1441 continue;
1442
1443 /* If there's required home OIs, there must be a match for each
1444 * required OI (see Passpoint v3.2 - 9.1.2 - RequiredHomeOI). */
1445 if (cred->num_required_home_ois > 0 &&
1446 cred_no_required_oi_match(cred, bss))
1447 continue;
1448
1449 if (!cred_home_ois_match(ie, anqp, cred) &&
1450 !cred_roaming_consortiums_match(ie, anqp, cred))
1451 continue;
1452
1453 if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1454 continue;
1455 if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1456 continue;
1457 if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1458 continue;
1459 if (cred_excluded_ssid(cred, bss)) {
1460 if (excluded == NULL)
1461 continue;
1462 if (selected == NULL) {
1463 selected = cred;
1464 is_excluded = 1;
1465 }
1466 } else {
1467 if (selected == NULL || is_excluded ||
1468 cred_prio_cmp(selected, cred) < 0) {
1469 selected = cred;
1470 is_excluded = 0;
1471 }
1472 }
1473 }
1474
1475 if (excluded)
1476 *excluded = is_excluded;
1477
1478 return selected;
1479 }
1480
1481
interworking_set_eap_params(struct wpa_ssid * ssid,struct wpa_cred * cred,int ttls)1482 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1483 struct wpa_cred *cred, int ttls)
1484 {
1485 if (cred->eap_method) {
1486 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1487 cred->eap_method->method == EAP_TYPE_TTLS;
1488
1489 os_free(ssid->eap.eap_methods);
1490 ssid->eap.eap_methods =
1491 os_malloc(sizeof(struct eap_method_type) * 2);
1492 if (ssid->eap.eap_methods == NULL)
1493 return -1;
1494 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1495 sizeof(*cred->eap_method));
1496 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1497 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1498 }
1499
1500 if (ttls && cred->username && cred->username[0]) {
1501 const char *pos;
1502 char *anon;
1503 /* Use anonymous NAI in Phase 1 */
1504 pos = os_strchr(cred->username, '@');
1505 if (pos) {
1506 size_t buflen = 9 + os_strlen(pos) + 1;
1507 anon = os_malloc(buflen);
1508 if (anon == NULL)
1509 return -1;
1510 os_snprintf(anon, buflen, "anonymous%s", pos);
1511 } else if (cred->realm) {
1512 size_t buflen = 10 + os_strlen(cred->realm) + 1;
1513 anon = os_malloc(buflen);
1514 if (anon == NULL)
1515 return -1;
1516 os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1517 } else {
1518 anon = os_strdup("anonymous");
1519 if (anon == NULL)
1520 return -1;
1521 }
1522 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1523 0) {
1524 os_free(anon);
1525 return -1;
1526 }
1527 os_free(anon);
1528 }
1529
1530 if (!ttls && cred->username && cred->username[0] && cred->realm &&
1531 !os_strchr(cred->username, '@')) {
1532 char *id;
1533 size_t buflen;
1534 int res;
1535
1536 buflen = os_strlen(cred->username) + 1 +
1537 os_strlen(cred->realm) + 1;
1538
1539 id = os_malloc(buflen);
1540 if (!id)
1541 return -1;
1542 os_snprintf(id, buflen, "%s@%s", cred->username, cred->realm);
1543 res = wpa_config_set_quoted(ssid, "identity", id);
1544 os_free(id);
1545 if (res < 0)
1546 return -1;
1547 } else if (cred->username && cred->username[0] &&
1548 wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1549 return -1;
1550
1551 if (cred->password && cred->password[0]) {
1552 if (cred->ext_password &&
1553 wpa_config_set(ssid, "password", cred->password, 0) < 0)
1554 return -1;
1555 if (!cred->ext_password &&
1556 wpa_config_set_quoted(ssid, "password", cred->password) <
1557 0)
1558 return -1;
1559 }
1560
1561 if (cred->client_cert && cred->client_cert[0] &&
1562 wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1563 return -1;
1564
1565 #ifdef ANDROID
1566 if (cred->private_key &&
1567 os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1568 /* Use OpenSSL engine configuration for Android keystore */
1569 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1570 wpa_config_set_quoted(ssid, "key_id",
1571 cred->private_key + 11) < 0 ||
1572 wpa_config_set(ssid, "engine", "1", 0) < 0)
1573 return -1;
1574 } else
1575 #endif /* ANDROID */
1576 if (cred->private_key && cred->private_key[0] &&
1577 wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1578 return -1;
1579
1580 if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1581 wpa_config_set_quoted(ssid, "private_key_passwd",
1582 cred->private_key_passwd) < 0)
1583 return -1;
1584
1585 if (cred->ca_cert_id && cred->ca_cert_id[0] &&
1586 wpa_config_set_quoted(ssid, "ca_cert_id", cred->ca_cert_id) < 0)
1587 return -1;
1588
1589 if (cred->cert_id && cred->cert_id[0] &&
1590 wpa_config_set_quoted(ssid, "cert_id", cred->cert_id) < 0)
1591 return -1;
1592
1593 if (cred->key_id && cred->key_id[0] &&
1594 wpa_config_set_quoted(ssid, "key_id", cred->key_id) < 0)
1595 return -1;
1596
1597 if (cred->engine_id && cred->engine_id[0] &&
1598 wpa_config_set_quoted(ssid, "engine_id", cred->engine_id) < 0)
1599 return -1;
1600
1601 ssid->eap.cert.engine = cred->engine;
1602
1603 if (cred->phase1) {
1604 os_free(ssid->eap.phase1);
1605 ssid->eap.phase1 = os_strdup(cred->phase1);
1606 }
1607 if (cred->phase2) {
1608 os_free(ssid->eap.phase2);
1609 ssid->eap.phase2 = os_strdup(cred->phase2);
1610 }
1611
1612 if (cred->ca_cert && cred->ca_cert[0] &&
1613 wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1614 return -1;
1615
1616 if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1617 wpa_config_set_quoted(ssid, "domain_suffix_match",
1618 cred->domain_suffix_match) < 0)
1619 return -1;
1620
1621 ssid->eap.cert.ocsp = cred->ocsp;
1622
1623 return 0;
1624 }
1625
1626
interworking_connect_roaming_consortium(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpa_bss * bss,int only_add)1627 static int interworking_connect_roaming_consortium(
1628 struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1629 struct wpa_bss *bss, int only_add)
1630 {
1631 struct wpa_ssid *ssid;
1632 const u8 *ie;
1633 const struct wpabuf *anqp;
1634 unsigned int i;
1635
1636 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
1637 " based on roaming consortium match", MAC2STR(bss->bssid));
1638
1639 if (already_connected(wpa_s, cred, bss)) {
1640 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1641 MAC2STR(bss->bssid));
1642 return wpa_s->current_ssid->id;
1643 }
1644
1645 remove_duplicate_network(wpa_s, cred, bss);
1646
1647 ssid = wpa_config_add_network(wpa_s->conf);
1648 if (ssid == NULL)
1649 return -1;
1650 ssid->parent_cred = cred;
1651 wpas_notify_network_added(wpa_s, ssid);
1652 wpa_config_set_network_defaults(ssid);
1653 ssid->priority = cred->priority;
1654 ssid->temporary = 1;
1655 ssid->ssid = os_zalloc(bss->ssid_len + 1);
1656 if (ssid->ssid == NULL)
1657 goto fail;
1658 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1659 ssid->ssid_len = bss->ssid_len;
1660
1661 if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1662 goto fail;
1663
1664 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1665 anqp = bss->anqp ? bss->anqp->roaming_consortium : NULL;
1666 for (i = 0; (ie || anqp) && i < cred->num_roaming_consortiums; i++) {
1667 if (!oi_match(ie, anqp, cred->roaming_consortiums[i],
1668 cred->roaming_consortiums_len[i]))
1669 continue;
1670
1671 ssid->roaming_consortium_selection =
1672 os_malloc(cred->roaming_consortiums_len[i]);
1673 if (!ssid->roaming_consortium_selection)
1674 goto fail;
1675 os_memcpy(ssid->roaming_consortium_selection,
1676 cred->roaming_consortiums[i],
1677 cred->roaming_consortiums_len[i]);
1678 ssid->roaming_consortium_selection_len =
1679 cred->roaming_consortiums_len[i];
1680 break;
1681 }
1682
1683 if (cred->eap_method == NULL) {
1684 wpa_msg(wpa_s, MSG_DEBUG,
1685 "Interworking: No EAP method set for credential using roaming consortium");
1686 goto fail;
1687 }
1688
1689 if (interworking_set_eap_params(
1690 ssid, cred,
1691 cred->eap_method->vendor == EAP_VENDOR_IETF &&
1692 cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1693 goto fail;
1694
1695 wpa_s->next_ssid = ssid;
1696 wpa_config_update_prio_list(wpa_s->conf);
1697 if (!only_add)
1698 interworking_reconnect(wpa_s);
1699
1700 return ssid->id;
1701
1702 fail:
1703 wpas_notify_network_removed(wpa_s, ssid);
1704 wpa_config_remove_network(wpa_s->conf, ssid->id);
1705 return -1;
1706 }
1707
1708
interworking_connect(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,int only_add)1709 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
1710 int only_add)
1711 {
1712 struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1713 struct wpa_ssid *ssid;
1714 struct nai_realm *realm;
1715 struct nai_realm_eap *eap = NULL;
1716 u16 count, i;
1717 char buf[100];
1718 int excluded = 0, *excl = &excluded;
1719 const char *name;
1720
1721 if (wpa_s->conf->cred == NULL || bss == NULL)
1722 return -1;
1723 if (disallowed_bssid(wpa_s, bss->bssid) ||
1724 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1725 wpa_msg(wpa_s, MSG_DEBUG,
1726 "Interworking: Reject connection to disallowed BSS "
1727 MACSTR, MAC2STR(bss->bssid));
1728 return -1;
1729 }
1730
1731 wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1732 " for connection",
1733 MAC2STR(bss->bssid));
1734
1735 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1736 /*
1737 * We currently support only HS 2.0 networks and those are
1738 * required to use WPA2-Enterprise.
1739 */
1740 wpa_msg(wpa_s, MSG_DEBUG,
1741 "Interworking: Network does not use RSN");
1742 return -1;
1743 }
1744
1745 cred_rc = interworking_credentials_available_roaming_consortium(
1746 wpa_s, bss, 0, excl);
1747 if (cred_rc) {
1748 wpa_msg(wpa_s, MSG_DEBUG,
1749 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d",
1750 cred_rc->priority, cred_rc->sp_priority);
1751 if (excl && !(*excl))
1752 excl = NULL;
1753 }
1754
1755 cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1756 if (cred) {
1757 wpa_msg(wpa_s, MSG_DEBUG,
1758 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d",
1759 cred->priority, cred->sp_priority);
1760 if (excl && !(*excl))
1761 excl = NULL;
1762 }
1763
1764 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1765 excl);
1766 if (cred_3gpp) {
1767 wpa_msg(wpa_s, MSG_DEBUG,
1768 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d",
1769 cred_3gpp->priority, cred_3gpp->sp_priority);
1770 if (excl && !(*excl))
1771 excl = NULL;
1772 }
1773
1774 if (!cred_rc && !cred && !cred_3gpp) {
1775 wpa_msg(wpa_s, MSG_DEBUG,
1776 "Interworking: No full credential matches - consider options without BW(etc.) limits");
1777 cred_rc = interworking_credentials_available_roaming_consortium(
1778 wpa_s, bss, 1, excl);
1779 if (cred_rc) {
1780 wpa_msg(wpa_s, MSG_DEBUG,
1781 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)",
1782 cred_rc->priority, cred_rc->sp_priority);
1783 if (excl && !(*excl))
1784 excl = NULL;
1785 }
1786
1787 cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1788 excl);
1789 if (cred) {
1790 wpa_msg(wpa_s, MSG_DEBUG,
1791 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)",
1792 cred->priority, cred->sp_priority);
1793 if (excl && !(*excl))
1794 excl = NULL;
1795 }
1796
1797 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1798 1, excl);
1799 if (cred_3gpp) {
1800 wpa_msg(wpa_s, MSG_DEBUG,
1801 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)",
1802 cred_3gpp->priority, cred_3gpp->sp_priority);
1803 if (excl && !(*excl))
1804 excl = NULL;
1805 }
1806 }
1807
1808 if (cred_rc &&
1809 (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1810 (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1811 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1812 bss, only_add);
1813
1814 if (cred_3gpp &&
1815 (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1816 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss,
1817 only_add);
1818 }
1819
1820 if (cred == NULL) {
1821 wpa_msg(wpa_s, MSG_DEBUG,
1822 "Interworking: No matching credentials found for "
1823 MACSTR, MAC2STR(bss->bssid));
1824 return -1;
1825 }
1826
1827 realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1828 &count);
1829 if (realm == NULL) {
1830 wpa_msg(wpa_s, MSG_DEBUG,
1831 "Interworking: Could not parse NAI Realm list from "
1832 MACSTR, MAC2STR(bss->bssid));
1833 return -1;
1834 }
1835
1836 for (i = 0; i < count; i++) {
1837 if (!nai_realm_match(&realm[i], cred->realm))
1838 continue;
1839 eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1840 if (eap)
1841 break;
1842 }
1843
1844 if (!eap) {
1845 wpa_msg(wpa_s, MSG_DEBUG,
1846 "Interworking: No matching credentials and EAP method found for "
1847 MACSTR, MAC2STR(bss->bssid));
1848 nai_realm_free(realm, count);
1849 return -1;
1850 }
1851
1852 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR,
1853 MAC2STR(bss->bssid));
1854
1855 if (already_connected(wpa_s, cred, bss)) {
1856 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1857 MAC2STR(bss->bssid));
1858 nai_realm_free(realm, count);
1859 return 0;
1860 }
1861
1862 remove_duplicate_network(wpa_s, cred, bss);
1863
1864 ssid = wpa_config_add_network(wpa_s->conf);
1865 if (ssid == NULL) {
1866 nai_realm_free(realm, count);
1867 return -1;
1868 }
1869 ssid->parent_cred = cred;
1870 wpas_notify_network_added(wpa_s, ssid);
1871 wpa_config_set_network_defaults(ssid);
1872 ssid->priority = cred->priority;
1873 ssid->temporary = 1;
1874 ssid->ssid = os_zalloc(bss->ssid_len + 1);
1875 if (ssid->ssid == NULL)
1876 goto fail;
1877 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1878 ssid->ssid_len = bss->ssid_len;
1879
1880 if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1881 goto fail;
1882
1883 if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1884 eap->method), 0) < 0)
1885 goto fail;
1886
1887 switch (eap->method) {
1888 case EAP_TYPE_TTLS:
1889 if (eap->inner_method) {
1890 name = eap_get_name(EAP_VENDOR_IETF, eap->inner_method);
1891 if (!name)
1892 goto fail;
1893 os_snprintf(buf, sizeof(buf), "\"autheap=%s\"", name);
1894 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1895 goto fail;
1896 break;
1897 }
1898 switch (eap->inner_non_eap) {
1899 case NAI_REALM_INNER_NON_EAP_PAP:
1900 if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1901 0)
1902 goto fail;
1903 break;
1904 case NAI_REALM_INNER_NON_EAP_CHAP:
1905 if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1906 < 0)
1907 goto fail;
1908 break;
1909 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1910 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1911 0) < 0)
1912 goto fail;
1913 break;
1914 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1915 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1916 0) < 0)
1917 goto fail;
1918 break;
1919 default:
1920 /* EAP params were not set - assume TTLS/MSCHAPv2 */
1921 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1922 0) < 0)
1923 goto fail;
1924 break;
1925 }
1926 break;
1927 case EAP_TYPE_PEAP:
1928 case EAP_TYPE_FAST:
1929 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1930 0) < 0)
1931 goto fail;
1932 if (wpa_config_set(ssid, "pac_file",
1933 "\"blob://pac_interworking\"", 0) < 0)
1934 goto fail;
1935 name = eap_get_name(EAP_VENDOR_IETF,
1936 eap->inner_method ? eap->inner_method :
1937 EAP_TYPE_MSCHAPV2);
1938 if (name == NULL)
1939 goto fail;
1940 os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1941 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1942 goto fail;
1943 break;
1944 case EAP_TYPE_TLS:
1945 break;
1946 }
1947
1948 if (interworking_set_eap_params(ssid, cred,
1949 eap->method == EAP_TYPE_TTLS) < 0)
1950 goto fail;
1951
1952 nai_realm_free(realm, count);
1953
1954 wpa_s->next_ssid = ssid;
1955 wpa_config_update_prio_list(wpa_s->conf);
1956 if (!only_add)
1957 interworking_reconnect(wpa_s);
1958
1959 return ssid->id;
1960
1961 fail:
1962 wpas_notify_network_removed(wpa_s, ssid);
1963 wpa_config_remove_network(wpa_s->conf, ssid->id);
1964 nai_realm_free(realm, count);
1965 return -1;
1966 }
1967
1968
1969 #ifdef PCSC_FUNCS
interworking_pcsc_read_imsi(struct wpa_supplicant * wpa_s)1970 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1971 {
1972 size_t len;
1973
1974 if (wpa_s->imsi[0] && wpa_s->mnc_len)
1975 return 0;
1976
1977 len = sizeof(wpa_s->imsi) - 1;
1978 if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1979 scard_deinit(wpa_s->scard);
1980 wpa_s->scard = NULL;
1981 wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1982 return -1;
1983 }
1984 wpa_s->imsi[len] = '\0';
1985 wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1986 wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1987 wpa_s->imsi, wpa_s->mnc_len);
1988
1989 return 0;
1990 }
1991 #endif /* PCSC_FUNCS */
1992
1993
interworking_credentials_available_3gpp(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,int ignore_bw,int * excluded)1994 static struct wpa_cred * interworking_credentials_available_3gpp(
1995 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1996 int *excluded)
1997 {
1998 struct wpa_cred *selected = NULL;
1999 #ifdef INTERWORKING_3GPP
2000 struct wpa_cred *cred;
2001 int ret;
2002 int is_excluded = 0;
2003
2004 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) {
2005 wpa_msg(wpa_s, MSG_DEBUG,
2006 "interworking-avail-3gpp: not avail, anqp: %p anqp_3gpp: %p",
2007 bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
2008 return NULL;
2009 }
2010
2011 #ifdef CONFIG_EAP_PROXY
2012 if (!wpa_s->imsi[0]) {
2013 size_t len;
2014 wpa_msg(wpa_s, MSG_DEBUG,
2015 "Interworking: IMSI not available - try to read again through eap_proxy");
2016 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol, -1,
2017 wpa_s->imsi,
2018 &len);
2019 if (wpa_s->mnc_len > 0) {
2020 wpa_s->imsi[len] = '\0';
2021 wpa_msg(wpa_s, MSG_DEBUG,
2022 "eap_proxy: IMSI %s (MNC length %d)",
2023 wpa_s->imsi, wpa_s->mnc_len);
2024 } else {
2025 wpa_msg(wpa_s, MSG_DEBUG,
2026 "eap_proxy: IMSI not available");
2027 }
2028 }
2029 #endif /* CONFIG_EAP_PROXY */
2030
2031 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2032 char *sep;
2033 const char *imsi;
2034 int mnc_len;
2035 char imsi_buf[16];
2036 size_t msin_len;
2037
2038 #ifdef PCSC_FUNCS
2039 if (cred->pcsc && wpa_s->scard) {
2040 if (interworking_pcsc_read_imsi(wpa_s) < 0)
2041 continue;
2042 imsi = wpa_s->imsi;
2043 mnc_len = wpa_s->mnc_len;
2044 goto compare;
2045 }
2046 #endif /* PCSC_FUNCS */
2047 #ifdef CONFIG_EAP_PROXY
2048 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2049 imsi = wpa_s->imsi;
2050 mnc_len = wpa_s->mnc_len;
2051 goto compare;
2052 }
2053 #endif /* CONFIG_EAP_PROXY */
2054
2055 if (cred->imsi == NULL || !cred->imsi[0] ||
2056 (!wpa_s->conf->external_sim &&
2057 (cred->milenage == NULL || !cred->milenage[0])))
2058 continue;
2059
2060 sep = os_strchr(cred->imsi, '-');
2061 if (sep == NULL ||
2062 (sep - cred->imsi != 5 && sep - cred->imsi != 6))
2063 continue;
2064 mnc_len = sep - cred->imsi - 3;
2065 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
2066 sep++;
2067 msin_len = os_strlen(cred->imsi);
2068 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
2069 msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
2070 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
2071 imsi_buf[3 + mnc_len + msin_len] = '\0';
2072 imsi = imsi_buf;
2073
2074 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
2075 compare:
2076 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
2077 wpa_msg(wpa_s, MSG_DEBUG,
2078 "Interworking: Parsing 3GPP info from " MACSTR,
2079 MAC2STR(bss->bssid));
2080 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
2081 wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound",
2082 ret ? "" : "not ");
2083 if (ret) {
2084 if (cred_no_required_oi_match(cred, bss))
2085 continue;
2086 if (!ignore_bw &&
2087 cred_below_min_backhaul(wpa_s, cred, bss))
2088 continue;
2089 if (!ignore_bw &&
2090 cred_over_max_bss_load(wpa_s, cred, bss))
2091 continue;
2092 if (!ignore_bw &&
2093 cred_conn_capab_missing(wpa_s, cred, bss))
2094 continue;
2095 if (cred_excluded_ssid(cred, bss)) {
2096 if (excluded == NULL)
2097 continue;
2098 if (selected == NULL) {
2099 selected = cred;
2100 is_excluded = 1;
2101 }
2102 } else {
2103 if (selected == NULL || is_excluded ||
2104 cred_prio_cmp(selected, cred) < 0) {
2105 selected = cred;
2106 is_excluded = 0;
2107 }
2108 }
2109 }
2110 }
2111
2112 if (excluded)
2113 *excluded = is_excluded;
2114 #endif /* INTERWORKING_3GPP */
2115 return selected;
2116 }
2117
2118
interworking_credentials_available_realm(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,int ignore_bw,int * excluded)2119 static struct wpa_cred * interworking_credentials_available_realm(
2120 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2121 int *excluded)
2122 {
2123 struct wpa_cred *cred, *selected = NULL;
2124 struct nai_realm *realm;
2125 u16 count, i;
2126 int is_excluded = 0;
2127
2128 if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
2129 return NULL;
2130
2131 if (wpa_s->conf->cred == NULL)
2132 return NULL;
2133
2134 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
2135 MACSTR, MAC2STR(bss->bssid));
2136 realm = nai_realm_parse(bss->anqp->nai_realm, &count);
2137 if (realm == NULL) {
2138 wpa_msg(wpa_s, MSG_DEBUG,
2139 "Interworking: Could not parse NAI Realm list from "
2140 MACSTR, MAC2STR(bss->bssid));
2141 return NULL;
2142 }
2143
2144 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2145 if (cred->realm == NULL)
2146 continue;
2147
2148 for (i = 0; i < count; i++) {
2149 if (!nai_realm_match(&realm[i], cred->realm))
2150 continue;
2151 if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2152 if (cred_no_required_oi_match(cred, bss))
2153 continue;
2154 if (!ignore_bw &&
2155 cred_below_min_backhaul(wpa_s, cred, bss))
2156 continue;
2157 if (!ignore_bw &&
2158 cred_over_max_bss_load(wpa_s, cred, bss))
2159 continue;
2160 if (!ignore_bw &&
2161 cred_conn_capab_missing(wpa_s, cred, bss))
2162 continue;
2163 if (cred_excluded_ssid(cred, bss)) {
2164 if (excluded == NULL)
2165 continue;
2166 if (selected == NULL) {
2167 selected = cred;
2168 is_excluded = 1;
2169 }
2170 } else {
2171 if (selected == NULL || is_excluded ||
2172 cred_prio_cmp(selected, cred) < 0)
2173 {
2174 selected = cred;
2175 is_excluded = 0;
2176 }
2177 }
2178 break;
2179 } else {
2180 wpa_msg(wpa_s, MSG_DEBUG,
2181 "Interworking: realm-find-eap returned false");
2182 }
2183 }
2184 }
2185
2186 nai_realm_free(realm, count);
2187
2188 if (excluded)
2189 *excluded = is_excluded;
2190
2191 return selected;
2192 }
2193
2194
interworking_credentials_available_helper(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,int ignore_bw,int * excluded)2195 static struct wpa_cred * interworking_credentials_available_helper(
2196 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2197 int *excluded)
2198 {
2199 struct wpa_cred *cred, *cred2;
2200 int excluded1, excluded2 = 0;
2201
2202 if (disallowed_bssid(wpa_s, bss->bssid) ||
2203 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2204 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2205 MACSTR, MAC2STR(bss->bssid));
2206 return NULL;
2207 }
2208
2209 cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2210 &excluded1);
2211 cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2212 &excluded2);
2213 if (cred && cred2 &&
2214 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2215 cred = cred2;
2216 excluded1 = excluded2;
2217 }
2218 if (!cred) {
2219 cred = cred2;
2220 excluded1 = excluded2;
2221 }
2222
2223 cred2 = interworking_credentials_available_roaming_consortium(
2224 wpa_s, bss, ignore_bw, &excluded2);
2225 if (cred && cred2 &&
2226 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2227 cred = cred2;
2228 excluded1 = excluded2;
2229 }
2230 if (!cred) {
2231 cred = cred2;
2232 excluded1 = excluded2;
2233 }
2234
2235 if (excluded)
2236 *excluded = excluded1;
2237 return cred;
2238 }
2239
2240
interworking_credentials_available(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,int * excluded)2241 static struct wpa_cred * interworking_credentials_available(
2242 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
2243 {
2244 struct wpa_cred *cred;
2245
2246 if (excluded)
2247 *excluded = 0;
2248 cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2249 excluded);
2250 if (cred)
2251 return cred;
2252 return interworking_credentials_available_helper(wpa_s, bss, 1,
2253 excluded);
2254 }
2255
2256
domain_name_list_contains(struct wpabuf * domain_names,const char * domain,int exact_match)2257 int domain_name_list_contains(struct wpabuf *domain_names,
2258 const char *domain, int exact_match)
2259 {
2260 const u8 *pos, *end;
2261 size_t len;
2262
2263 len = os_strlen(domain);
2264 pos = wpabuf_head(domain_names);
2265 end = pos + wpabuf_len(domain_names);
2266
2267 while (end - pos > 1) {
2268 u8 elen;
2269
2270 elen = *pos++;
2271 if (elen > end - pos)
2272 break;
2273
2274 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2275 pos, elen);
2276 if (elen == len &&
2277 os_strncasecmp(domain, (const char *) pos, len) == 0)
2278 return 1;
2279 if (!exact_match && elen > len && pos[elen - len - 1] == '.') {
2280 const char *ap = (const char *) pos;
2281 int offset = elen - len;
2282
2283 if (os_strncasecmp(domain, ap + offset, len) == 0)
2284 return 1;
2285 }
2286
2287 pos += elen;
2288 }
2289
2290 return 0;
2291 }
2292
2293
interworking_home_sp_cred(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpabuf * domain_names)2294 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2295 struct wpa_cred *cred,
2296 struct wpabuf *domain_names)
2297 {
2298 size_t i;
2299 int ret = -1;
2300 #ifdef INTERWORKING_3GPP
2301 char nai[100], *realm;
2302
2303 char *imsi = NULL;
2304 int mnc_len = 0;
2305 if (cred->imsi)
2306 imsi = cred->imsi;
2307 #ifdef PCSC_FUNCS
2308 else if (cred->pcsc && wpa_s->scard) {
2309 if (interworking_pcsc_read_imsi(wpa_s) < 0)
2310 return -1;
2311 imsi = wpa_s->imsi;
2312 mnc_len = wpa_s->mnc_len;
2313 }
2314 #endif /* PCSC_FUNCS */
2315 #ifdef CONFIG_EAP_PROXY
2316 else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2317 imsi = wpa_s->imsi;
2318 mnc_len = wpa_s->mnc_len;
2319 }
2320 #endif /* CONFIG_EAP_PROXY */
2321 if (domain_names &&
2322 imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2323 realm = os_strchr(nai, '@');
2324 if (realm)
2325 realm++;
2326 wpa_msg(wpa_s, MSG_DEBUG,
2327 "Interworking: Search for match with SIM/USIM domain %s",
2328 realm ? realm : "[NULL]");
2329 if (realm &&
2330 domain_name_list_contains(domain_names, realm, 1))
2331 return 1;
2332 if (realm)
2333 ret = 0;
2334 }
2335 #endif /* INTERWORKING_3GPP */
2336
2337 if (domain_names == NULL || cred->domain == NULL)
2338 return ret;
2339
2340 for (i = 0; i < cred->num_domain; i++) {
2341 wpa_msg(wpa_s, MSG_DEBUG,
2342 "Interworking: Search for match with home SP FQDN %s",
2343 cred->domain[i]);
2344 if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2345 return 1;
2346 }
2347
2348 return 0;
2349 }
2350
2351
interworking_home_sp(struct wpa_supplicant * wpa_s,struct wpabuf * domain_names)2352 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2353 struct wpabuf *domain_names)
2354 {
2355 struct wpa_cred *cred;
2356
2357 if (domain_names == NULL || wpa_s->conf->cred == NULL)
2358 return -1;
2359
2360 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2361 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2362 if (res)
2363 return res;
2364 }
2365
2366 return 0;
2367 }
2368
2369
interworking_find_network_match(struct wpa_supplicant * wpa_s)2370 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2371 {
2372 struct wpa_bss *bss;
2373 struct wpa_ssid *ssid;
2374
2375 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2376 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2377 if (wpas_network_disabled(wpa_s, ssid) ||
2378 ssid->mode != WPAS_MODE_INFRA)
2379 continue;
2380 if (ssid->ssid_len != bss->ssid_len ||
2381 os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2382 0)
2383 continue;
2384 /*
2385 * TODO: Consider more accurate matching of security
2386 * configuration similarly to what is done in events.c
2387 */
2388 return 1;
2389 }
2390 }
2391
2392 return 0;
2393 }
2394
2395
roaming_partner_match(struct wpa_supplicant * wpa_s,struct roaming_partner * partner,struct wpabuf * domain_names)2396 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2397 struct roaming_partner *partner,
2398 struct wpabuf *domain_names)
2399 {
2400 wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2401 partner->fqdn, partner->exact_match, partner->priority,
2402 partner->country);
2403 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2404 wpabuf_head(domain_names),
2405 wpabuf_len(domain_names));
2406 if (!domain_name_list_contains(domain_names, partner->fqdn,
2407 partner->exact_match))
2408 return 0;
2409 /* TODO: match Country */
2410 return 1;
2411 }
2412
2413
roaming_prio(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpa_bss * bss)2414 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2415 struct wpa_bss *bss)
2416 {
2417 size_t i;
2418
2419 if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
2420 wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2421 return 128; /* cannot check preference with domain name */
2422 }
2423
2424 if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2425 {
2426 wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2427 return 0; /* max preference for home SP network */
2428 }
2429
2430 for (i = 0; i < cred->num_roaming_partner; i++) {
2431 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2432 bss->anqp->domain_name)) {
2433 wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2434 cred->roaming_partner[i].priority);
2435 return cred->roaming_partner[i].priority;
2436 }
2437 }
2438
2439 wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2440 return 128;
2441 }
2442
2443
pick_best_roaming_partner(struct wpa_supplicant * wpa_s,struct wpa_bss * selected,struct wpa_cred * cred)2444 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2445 struct wpa_bss *selected,
2446 struct wpa_cred *cred)
2447 {
2448 struct wpa_bss *bss;
2449 u8 best_prio, prio;
2450 struct wpa_cred *cred2;
2451
2452 /*
2453 * Check if any other BSS is operated by a more preferred roaming
2454 * partner.
2455 */
2456
2457 best_prio = roaming_prio(wpa_s, cred, selected);
2458 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2459 MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2460 cred->id);
2461
2462 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2463 if (bss == selected)
2464 continue;
2465 cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2466 if (!cred2)
2467 continue;
2468 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2469 continue;
2470 prio = roaming_prio(wpa_s, cred2, bss);
2471 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2472 MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2473 cred2->id);
2474 if (prio < best_prio) {
2475 int bh1, bh2, load1, load2, conn1, conn2;
2476 bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2477 load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2478 conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2479 bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2480 load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2481 conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2482 wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d new: %d %d %d",
2483 bh1, load1, conn1, bh2, load2, conn2);
2484 if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2485 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2486 best_prio = prio;
2487 selected = bss;
2488 }
2489 }
2490 }
2491
2492 return selected;
2493 }
2494
2495
interworking_select_network(struct wpa_supplicant * wpa_s)2496 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2497 {
2498 struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2499 struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2500 unsigned int count = 0;
2501 const char *type;
2502 int res;
2503 struct wpa_cred *cred, *selected_cred = NULL;
2504 struct wpa_cred *selected_home_cred = NULL;
2505 struct wpa_cred *selected2_cred = NULL;
2506 struct wpa_cred *selected2_home_cred = NULL;
2507
2508 wpa_s->network_select = 0;
2509
2510 wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2511 wpa_s->auto_select);
2512 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2513 int excluded = 0;
2514 int bh, bss_load, conn_capab;
2515 cred = interworking_credentials_available(wpa_s, bss,
2516 &excluded);
2517 if (!cred)
2518 continue;
2519
2520 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2521 /*
2522 * We currently support only HS 2.0 networks and those
2523 * are required to use WPA2-Enterprise.
2524 */
2525 wpa_msg(wpa_s, MSG_DEBUG,
2526 "Interworking: Credential match with " MACSTR
2527 " but network does not use RSN",
2528 MAC2STR(bss->bssid));
2529 continue;
2530 }
2531 if (!excluded)
2532 count++;
2533 res = interworking_home_sp(wpa_s, bss->anqp ?
2534 bss->anqp->domain_name : NULL);
2535 if (res > 0)
2536 type = "home";
2537 else if (res == 0)
2538 type = "roaming";
2539 else
2540 type = "unknown";
2541 bh = cred_below_min_backhaul(wpa_s, cred, bss);
2542 bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2543 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2544 wpas_notify_interworking_ap_added(wpa_s, bss, cred, excluded,
2545 type, bh, bss_load,
2546 conn_capab);
2547 if (excluded)
2548 continue;
2549 if (wpa_s->auto_select ||
2550 (wpa_s->conf->auto_interworking &&
2551 wpa_s->auto_network_select)) {
2552 if (bh || bss_load || conn_capab) {
2553 if (selected2_cred == NULL ||
2554 cred_prio_cmp(cred, selected2_cred) > 0) {
2555 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2556 selected2 = bss;
2557 selected2_cred = cred;
2558 }
2559 if (res > 0 &&
2560 (selected2_home_cred == NULL ||
2561 cred_prio_cmp(cred, selected2_home_cred) >
2562 0)) {
2563 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2564 selected2_home = bss;
2565 selected2_home_cred = cred;
2566 }
2567 } else {
2568 if (selected_cred == NULL ||
2569 cred_prio_cmp(cred, selected_cred) > 0) {
2570 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2571 selected = bss;
2572 selected_cred = cred;
2573 }
2574 if (res > 0 &&
2575 (selected_home_cred == NULL ||
2576 cred_prio_cmp(cred, selected_home_cred) >
2577 0)) {
2578 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2579 selected_home = bss;
2580 selected_home_cred = cred;
2581 }
2582 }
2583 }
2584 }
2585
2586 if (selected_home && selected_home != selected &&
2587 selected_home_cred &&
2588 (selected_cred == NULL ||
2589 cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2590 /* Prefer network operated by the Home SP */
2591 wpa_printf(MSG_DEBUG, "Interworking: Overrode selected with selected_home");
2592 selected = selected_home;
2593 selected_cred = selected_home_cred;
2594 }
2595
2596 if (!selected) {
2597 if (selected2_home) {
2598 wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2599 selected = selected2_home;
2600 selected_cred = selected2_home_cred;
2601 } else if (selected2) {
2602 wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2603 selected = selected2;
2604 selected_cred = selected2_cred;
2605 }
2606 }
2607
2608 if (count == 0) {
2609 /*
2610 * No matching network was found based on configured
2611 * credentials. Check whether any of the enabled network blocks
2612 * have matching APs.
2613 */
2614 if (interworking_find_network_match(wpa_s)) {
2615 wpa_msg(wpa_s, MSG_DEBUG,
2616 "Interworking: Possible BSS match for enabled network configurations");
2617 if (wpa_s->auto_select) {
2618 interworking_reconnect(wpa_s);
2619 return;
2620 }
2621 }
2622
2623 if (wpa_s->auto_network_select) {
2624 wpa_msg(wpa_s, MSG_DEBUG,
2625 "Interworking: Continue scanning after ANQP fetch");
2626 wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2627 0);
2628 return;
2629 }
2630
2631 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2632 "with matching credentials found");
2633 if (wpa_s->wpa_state == WPA_SCANNING)
2634 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2635 }
2636
2637 wpas_notify_interworking_select_done(wpa_s);
2638
2639 if (selected) {
2640 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2641 MAC2STR(selected->bssid));
2642 selected = pick_best_roaming_partner(wpa_s, selected,
2643 selected_cred);
2644 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2645 " (after best roaming partner selection)",
2646 MAC2STR(selected->bssid));
2647 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2648 MAC2STR(selected->bssid));
2649 interworking_connect(wpa_s, selected, 0);
2650 } else if (wpa_s->wpa_state == WPA_SCANNING)
2651 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2652 }
2653
2654
2655 static struct wpa_bss_anqp *
interworking_match_anqp_info(struct wpa_supplicant * wpa_s,struct wpa_bss * bss)2656 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2657 {
2658 struct wpa_bss *other;
2659
2660 if (is_zero_ether_addr(bss->hessid))
2661 return NULL; /* Cannot be in the same homegenous ESS */
2662
2663 dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2664 if (other == bss)
2665 continue;
2666 if (other->anqp == NULL)
2667 continue;
2668 if (other->anqp->roaming_consortium == NULL &&
2669 other->anqp->nai_realm == NULL &&
2670 other->anqp->anqp_3gpp == NULL &&
2671 other->anqp->domain_name == NULL)
2672 continue;
2673 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2674 continue;
2675 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2676 continue;
2677 if (bss->ssid_len != other->ssid_len ||
2678 os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2679 continue;
2680
2681 wpa_msg(wpa_s, MSG_DEBUG,
2682 "Interworking: Share ANQP data with already fetched BSSID "
2683 MACSTR " and " MACSTR,
2684 MAC2STR(other->bssid), MAC2STR(bss->bssid));
2685 other->anqp->users++;
2686 return other->anqp;
2687 }
2688
2689 return NULL;
2690 }
2691
2692
interworking_next_anqp_fetch(struct wpa_supplicant * wpa_s)2693 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2694 {
2695 struct wpa_bss *bss;
2696 int found = 0;
2697
2698 wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2699 "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2700 wpa_s->fetch_anqp_in_progress,
2701 wpa_s->fetch_osu_icon_in_progress);
2702
2703 if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2704 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2705 return;
2706 }
2707
2708 #ifdef CONFIG_HS20
2709 if (wpa_s->fetch_osu_icon_in_progress) {
2710 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2711 hs20_next_osu_icon(wpa_s);
2712 return;
2713 }
2714 #endif /* CONFIG_HS20 */
2715
2716 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2717 if (!(bss->caps & IEEE80211_CAP_ESS))
2718 continue;
2719 if (!wpa_bss_ext_capab(bss, WLAN_EXT_CAPAB_INTERWORKING))
2720 continue; /* AP does not support Interworking */
2721 if (disallowed_bssid(wpa_s, bss->bssid) ||
2722 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2723 continue; /* Disallowed BSS */
2724
2725 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2726 if (bss->anqp == NULL) {
2727 bss->anqp = interworking_match_anqp_info(wpa_s,
2728 bss);
2729 if (bss->anqp) {
2730 /* Shared data already fetched */
2731 continue;
2732 }
2733 bss->anqp = wpa_bss_anqp_alloc();
2734 if (bss->anqp == NULL)
2735 break;
2736 }
2737 found++;
2738 bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2739 wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2740 MACSTR " (HESSID " MACSTR ")",
2741 MAC2STR(bss->bssid), MAC2STR(bss->hessid));
2742 interworking_anqp_send_req(wpa_s, bss);
2743 break;
2744 }
2745 }
2746
2747 if (found == 0) {
2748 #ifdef CONFIG_HS20
2749 if (wpa_s->fetch_osu_info) {
2750 if (wpa_s->num_prov_found == 0 &&
2751 wpa_s->fetch_osu_waiting_scan &&
2752 wpa_s->num_osu_scans < 3) {
2753 wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2754 hs20_start_osu_scan(wpa_s);
2755 return;
2756 }
2757 wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2758 hs20_osu_icon_fetch(wpa_s);
2759 return;
2760 }
2761 #endif /* CONFIG_HS20 */
2762 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2763 wpa_s->fetch_anqp_in_progress = 0;
2764 if (wpa_s->network_select)
2765 interworking_select_network(wpa_s);
2766 }
2767 }
2768
2769
interworking_start_fetch_anqp(struct wpa_supplicant * wpa_s)2770 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2771 {
2772 struct wpa_bss *bss;
2773
2774 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2775 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2776
2777 wpa_s->fetch_anqp_in_progress = 1;
2778
2779 /*
2780 * Start actual ANQP operation from eloop call to make sure the loop
2781 * does not end up using excessive recursion.
2782 */
2783 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2784 }
2785
2786
interworking_fetch_anqp(struct wpa_supplicant * wpa_s)2787 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2788 {
2789 if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2790 return 0;
2791
2792 wpa_s->network_select = 0;
2793 wpa_s->fetch_all_anqp = 1;
2794 wpa_s->fetch_osu_info = 0;
2795
2796 interworking_start_fetch_anqp(wpa_s);
2797
2798 return 0;
2799 }
2800
2801
interworking_stop_fetch_anqp(struct wpa_supplicant * wpa_s)2802 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2803 {
2804 if (!wpa_s->fetch_anqp_in_progress)
2805 return;
2806
2807 wpa_s->fetch_anqp_in_progress = 0;
2808 }
2809
2810
anqp_send_req(struct wpa_supplicant * wpa_s,const u8 * dst,int freq,u16 info_ids[],size_t num_ids,u32 subtypes,u32 mbo_subtypes)2811 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, int freq,
2812 u16 info_ids[], size_t num_ids, u32 subtypes,
2813 u32 mbo_subtypes)
2814 {
2815 struct wpabuf *buf;
2816 struct wpabuf *extra_buf = NULL;
2817 int ret = 0;
2818 struct wpa_bss *bss;
2819 int res;
2820
2821 bss = wpa_bss_get_bssid(wpa_s, dst);
2822 if (!bss && !freq) {
2823 wpa_printf(MSG_WARNING,
2824 "ANQP: Cannot send query without BSS freq info");
2825 return -1;
2826 }
2827
2828 if (bss)
2829 wpa_bss_anqp_unshare_alloc(bss);
2830 if (bss && !freq)
2831 freq = bss->freq;
2832
2833 wpa_msg(wpa_s, MSG_DEBUG,
2834 "ANQP: Query Request to " MACSTR " for %u id(s)",
2835 MAC2STR(dst), (unsigned int) num_ids);
2836
2837 #ifdef CONFIG_HS20
2838 if (subtypes != 0) {
2839 extra_buf = wpabuf_alloc(100);
2840 if (extra_buf == NULL)
2841 return -1;
2842 hs20_put_anqp_req(subtypes, NULL, 0, extra_buf);
2843 }
2844 #endif /* CONFIG_HS20 */
2845
2846 #ifdef CONFIG_MBO
2847 if (mbo_subtypes) {
2848 struct wpabuf *mbo;
2849
2850 if (!bss) {
2851 wpa_printf(MSG_WARNING,
2852 "ANQP: Cannot send MBO query to unknown BSS "
2853 MACSTR, MAC2STR(dst));
2854 wpabuf_free(extra_buf);
2855 return -1;
2856 }
2857
2858 mbo = mbo_build_anqp_buf(wpa_s, bss, mbo_subtypes);
2859 if (mbo) {
2860 if (wpabuf_resize(&extra_buf, wpabuf_len(mbo))) {
2861 wpabuf_free(extra_buf);
2862 wpabuf_free(mbo);
2863 return -1;
2864 }
2865 wpabuf_put_buf(extra_buf, mbo);
2866 wpabuf_free(mbo);
2867 }
2868 }
2869 #endif /* CONFIG_MBO */
2870
2871 buf = anqp_build_req(info_ids, num_ids, extra_buf);
2872 wpabuf_free(extra_buf);
2873 if (buf == NULL)
2874 return -1;
2875
2876 res = gas_query_req(wpa_s->gas, dst, freq, 0, 0, buf, anqp_resp_cb,
2877 wpa_s);
2878 if (res < 0) {
2879 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
2880 wpabuf_free(buf);
2881 ret = -1;
2882 } else {
2883 wpa_msg(wpa_s, MSG_DEBUG,
2884 "ANQP: Query started with dialog token %u", res);
2885 }
2886
2887 return ret;
2888 }
2889
2890
anqp_add_extra(struct wpa_supplicant * wpa_s,struct wpa_bss_anqp * anqp,u16 info_id,const u8 * data,size_t slen,bool protected_response)2891 static void anqp_add_extra(struct wpa_supplicant *wpa_s,
2892 struct wpa_bss_anqp *anqp, u16 info_id,
2893 const u8 *data, size_t slen, bool protected_response)
2894 {
2895 struct wpa_bss_anqp_elem *tmp, *elem = NULL;
2896
2897 if (!anqp)
2898 return;
2899
2900 dl_list_for_each(tmp, &anqp->anqp_elems, struct wpa_bss_anqp_elem,
2901 list) {
2902 if (tmp->infoid == info_id) {
2903 elem = tmp;
2904 break;
2905 }
2906 }
2907
2908 if (!elem) {
2909 elem = os_zalloc(sizeof(*elem));
2910 if (!elem)
2911 return;
2912 elem->infoid = info_id;
2913 dl_list_add(&anqp->anqp_elems, &elem->list);
2914 } else {
2915 wpabuf_free(elem->payload);
2916 }
2917
2918 elem->protected_response = protected_response;
2919 elem->payload = wpabuf_alloc_copy(data, slen);
2920 if (!elem->payload) {
2921 dl_list_del(&elem->list);
2922 os_free(elem);
2923 }
2924 }
2925
2926
interworking_parse_venue_url(struct wpa_supplicant * wpa_s,const u8 * data,size_t len)2927 static void interworking_parse_venue_url(struct wpa_supplicant *wpa_s,
2928 const u8 *data, size_t len)
2929 {
2930 const u8 *pos = data, *end = data + len;
2931 char url[255];
2932
2933 while (end - pos >= 2) {
2934 u8 slen, num;
2935
2936 slen = *pos++;
2937 if (slen < 1 || slen > end - pos) {
2938 wpa_printf(MSG_DEBUG,
2939 "ANQP: Truncated Venue URL Duple field");
2940 return;
2941 }
2942
2943 num = *pos++;
2944 os_memcpy(url, pos, slen - 1);
2945 url[slen - 1] = '\0';
2946 wpa_msg(wpa_s, MSG_INFO, RX_VENUE_URL "%u %s", num, url);
2947 pos += slen - 1;
2948 }
2949 }
2950
2951
interworking_parse_rx_anqp_resp(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,const u8 * sa,u16 info_id,const u8 * data,size_t slen,u8 dialog_token)2952 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2953 struct wpa_bss *bss, const u8 *sa,
2954 u16 info_id,
2955 const u8 *data, size_t slen,
2956 u8 dialog_token)
2957 {
2958 const u8 *pos = data;
2959 struct wpa_bss_anqp *anqp = NULL;
2960 u8 type;
2961 bool protected_response;
2962
2963 if (bss)
2964 anqp = bss->anqp;
2965
2966 switch (info_id) {
2967 case ANQP_CAPABILITY_LIST:
2968 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2969 " ANQP Capability list", MAC2STR(sa));
2970 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list",
2971 pos, slen);
2972 if (anqp) {
2973 wpabuf_free(anqp->capability_list);
2974 anqp->capability_list = wpabuf_alloc_copy(pos, slen);
2975 }
2976 break;
2977 case ANQP_VENUE_NAME:
2978 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2979 " Venue Name", MAC2STR(sa));
2980 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2981 if (anqp) {
2982 wpabuf_free(anqp->venue_name);
2983 anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2984 }
2985 break;
2986 case ANQP_NETWORK_AUTH_TYPE:
2987 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2988 " Network Authentication Type information",
2989 MAC2STR(sa));
2990 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2991 "Type", pos, slen);
2992 if (anqp) {
2993 wpabuf_free(anqp->network_auth_type);
2994 anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2995 }
2996 break;
2997 case ANQP_ROAMING_CONSORTIUM:
2998 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2999 " Roaming Consortium list", MAC2STR(sa));
3000 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
3001 pos, slen);
3002 if (anqp) {
3003 wpabuf_free(anqp->roaming_consortium);
3004 anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
3005 }
3006 break;
3007 case ANQP_IP_ADDR_TYPE_AVAILABILITY:
3008 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
3009 " IP Address Type Availability information",
3010 MAC2STR(sa));
3011 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
3012 pos, slen);
3013 if (anqp) {
3014 wpabuf_free(anqp->ip_addr_type_availability);
3015 anqp->ip_addr_type_availability =
3016 wpabuf_alloc_copy(pos, slen);
3017 }
3018 break;
3019 case ANQP_NAI_REALM:
3020 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
3021 " NAI Realm list", MAC2STR(sa));
3022 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
3023 if (anqp) {
3024 wpabuf_free(anqp->nai_realm);
3025 anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
3026 }
3027 break;
3028 case ANQP_3GPP_CELLULAR_NETWORK:
3029 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
3030 " 3GPP Cellular Network information", MAC2STR(sa));
3031 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
3032 pos, slen);
3033 if (anqp) {
3034 wpabuf_free(anqp->anqp_3gpp);
3035 anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
3036 }
3037 break;
3038 case ANQP_DOMAIN_NAME:
3039 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
3040 " Domain Name list", MAC2STR(sa));
3041 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
3042 if (anqp) {
3043 wpabuf_free(anqp->domain_name);
3044 anqp->domain_name = wpabuf_alloc_copy(pos, slen);
3045 }
3046 break;
3047 #ifdef CONFIG_FILS
3048 case ANQP_FILS_REALM_INFO:
3049 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
3050 " FILS Realm Information", MAC2STR(sa));
3051 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: FILS Realm Information",
3052 pos, slen);
3053 if (anqp) {
3054 wpabuf_free(anqp->fils_realm_info);
3055 anqp->fils_realm_info = wpabuf_alloc_copy(pos, slen);
3056 }
3057 break;
3058 #endif /* CONFIG_FILS */
3059 case ANQP_VENUE_URL:
3060 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " Venue URL",
3061 MAC2STR(sa));
3062 protected_response = pmf_in_use(wpa_s, sa);
3063 anqp_add_extra(wpa_s, anqp, info_id, pos, slen,
3064 protected_response);
3065
3066 if (!protected_response) {
3067 wpa_printf(MSG_DEBUG,
3068 "ANQP: Ignore Venue URL since PMF was not enabled");
3069 break;
3070 }
3071 interworking_parse_venue_url(wpa_s, pos, slen);
3072 break;
3073 case ANQP_VENDOR_SPECIFIC:
3074 if (slen < 3)
3075 return;
3076
3077 switch (WPA_GET_BE24(pos)) {
3078 case OUI_WFA:
3079 pos += 3;
3080 slen -= 3;
3081
3082 if (slen < 1)
3083 return;
3084 type = *pos++;
3085 slen--;
3086
3087 switch (type) {
3088 #ifdef CONFIG_HS20
3089 case HS20_ANQP_OUI_TYPE:
3090 hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
3091 pos, slen,
3092 dialog_token);
3093 break;
3094 #endif /* CONFIG_HS20 */
3095 #ifdef CONFIG_MBO
3096 case MBO_ANQP_OUI_TYPE:
3097 mbo_parse_rx_anqp_resp(wpa_s, bss, sa,
3098 pos, slen);
3099 break;
3100 #endif /* CONFIG_MBO */
3101 default:
3102 wpa_msg(wpa_s, MSG_DEBUG,
3103 "ANQP: Unsupported ANQP vendor type %u",
3104 type);
3105 break;
3106 }
3107 break;
3108 default:
3109 wpa_msg(wpa_s, MSG_DEBUG,
3110 "Interworking: Unsupported vendor-specific ANQP OUI %06x",
3111 WPA_GET_BE24(pos));
3112 return;
3113 }
3114 break;
3115 default:
3116 wpa_msg(wpa_s, MSG_DEBUG,
3117 "Interworking: Unsupported ANQP Info ID %u", info_id);
3118 anqp_add_extra(wpa_s, anqp, info_id, data, slen,
3119 pmf_in_use(wpa_s, sa));
3120 break;
3121 }
3122 }
3123
3124
anqp_resp_cb(void * ctx,const u8 * dst,u8 dialog_token,enum gas_query_result result,const struct wpabuf * adv_proto,const struct wpabuf * resp,u16 status_code)3125 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
3126 enum gas_query_result result,
3127 const struct wpabuf *adv_proto,
3128 const struct wpabuf *resp, u16 status_code)
3129 {
3130 struct wpa_supplicant *wpa_s = ctx;
3131 const u8 *pos;
3132 const u8 *end;
3133 u16 info_id;
3134 u16 slen;
3135 struct wpa_bss *bss = NULL, *tmp;
3136 const char *anqp_result = "SUCCESS";
3137
3138 wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
3139 " dialog_token=%u result=%d status_code=%u",
3140 MAC2STR(dst), dialog_token, result, status_code);
3141 if (result != GAS_QUERY_SUCCESS) {
3142 #ifdef CONFIG_HS20
3143 if (wpa_s->fetch_osu_icon_in_progress)
3144 hs20_icon_fetch_failed(wpa_s);
3145 #endif /* CONFIG_HS20 */
3146 anqp_result = "FAILURE";
3147 goto out;
3148 }
3149
3150 pos = wpabuf_head(adv_proto);
3151 if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
3152 pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
3153 wpa_msg(wpa_s, MSG_DEBUG,
3154 "ANQP: Unexpected Advertisement Protocol in response");
3155 #ifdef CONFIG_HS20
3156 if (wpa_s->fetch_osu_icon_in_progress)
3157 hs20_icon_fetch_failed(wpa_s);
3158 #endif /* CONFIG_HS20 */
3159 anqp_result = "INVALID_FRAME";
3160 goto out;
3161 }
3162
3163 /*
3164 * If possible, select the BSS entry based on which BSS entry was used
3165 * for the request. This can help in cases where multiple BSS entries
3166 * may exist for the same AP.
3167 */
3168 dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
3169 if (tmp == wpa_s->interworking_gas_bss &&
3170 os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
3171 bss = tmp;
3172 break;
3173 }
3174 }
3175 if (bss == NULL)
3176 bss = wpa_bss_get_bssid(wpa_s, dst);
3177
3178 pos = wpabuf_head(resp);
3179 end = pos + wpabuf_len(resp);
3180
3181 while (pos < end) {
3182 unsigned int left = end - pos;
3183
3184 if (left < 4) {
3185 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element");
3186 anqp_result = "INVALID_FRAME";
3187 goto out_parse_done;
3188 }
3189 info_id = WPA_GET_LE16(pos);
3190 pos += 2;
3191 slen = WPA_GET_LE16(pos);
3192 pos += 2;
3193 left -= 4;
3194 if (left < slen) {
3195 wpa_msg(wpa_s, MSG_DEBUG,
3196 "ANQP: Invalid element length for Info ID %u",
3197 info_id);
3198 anqp_result = "INVALID_FRAME";
3199 goto out_parse_done;
3200 }
3201 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
3202 slen, dialog_token);
3203 pos += slen;
3204 }
3205
3206 out_parse_done:
3207 #ifdef CONFIG_HS20
3208 hs20_notify_parse_done(wpa_s);
3209 #endif /* CONFIG_HS20 */
3210 out:
3211 wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
3212 MAC2STR(dst), anqp_result);
3213 wpas_notify_anqp_query_done(wpa_s, dst, anqp_result, bss ? bss->anqp : NULL);
3214 }
3215
3216
interworking_scan_res_handler(struct wpa_supplicant * wpa_s,struct wpa_scan_results * scan_res)3217 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
3218 struct wpa_scan_results *scan_res)
3219 {
3220 wpa_msg(wpa_s, MSG_DEBUG,
3221 "Interworking: Scan results available - start ANQP fetch");
3222 interworking_start_fetch_anqp(wpa_s);
3223 }
3224
3225
interworking_select(struct wpa_supplicant * wpa_s,int auto_select,int * freqs)3226 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
3227 int *freqs)
3228 {
3229 interworking_stop_fetch_anqp(wpa_s);
3230 wpa_s->network_select = 1;
3231 wpa_s->auto_network_select = 0;
3232 wpa_s->auto_select = !!auto_select;
3233 wpa_s->fetch_all_anqp = 0;
3234 wpa_s->fetch_osu_info = 0;
3235 wpa_msg(wpa_s, MSG_DEBUG,
3236 "Interworking: Start scan for network selection");
3237 wpa_s->scan_res_handler = interworking_scan_res_handler;
3238 wpa_s->normal_scans = 0;
3239 wpa_s->scan_req = MANUAL_SCAN_REQ;
3240 os_free(wpa_s->manual_scan_freqs);
3241 wpa_s->manual_scan_freqs = freqs;
3242 wpa_s->after_wps = 0;
3243 wpa_s->known_wps_freq = 0;
3244 wpa_supplicant_req_scan(wpa_s, 0, 0);
3245
3246 return 0;
3247 }
3248
3249
gas_resp_cb(void * ctx,const u8 * addr,u8 dialog_token,enum gas_query_result result,const struct wpabuf * adv_proto,const struct wpabuf * resp,u16 status_code)3250 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
3251 enum gas_query_result result,
3252 const struct wpabuf *adv_proto,
3253 const struct wpabuf *resp, u16 status_code)
3254 {
3255 struct wpa_supplicant *wpa_s = ctx;
3256 struct wpabuf *n;
3257
3258 wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
3259 " dialog_token=%d status_code=%d resp_len=%d",
3260 MAC2STR(addr), dialog_token, status_code,
3261 resp ? (int) wpabuf_len(resp) : -1);
3262 if (!resp)
3263 return;
3264
3265 n = wpabuf_dup(resp);
3266 if (n == NULL)
3267 return;
3268 wpabuf_free(wpa_s->prev_gas_resp);
3269 wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
3270 os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
3271 wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
3272 wpa_s->last_gas_resp = n;
3273 os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
3274 wpa_s->last_gas_dialog_token = dialog_token;
3275 }
3276
3277
gas_send_request(struct wpa_supplicant * wpa_s,const u8 * dst,const struct wpabuf * adv_proto,const struct wpabuf * query)3278 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
3279 const struct wpabuf *adv_proto,
3280 const struct wpabuf *query)
3281 {
3282 struct wpabuf *buf;
3283 int ret = 0;
3284 int freq;
3285 struct wpa_bss *bss;
3286 int res;
3287 size_t len;
3288 u8 query_resp_len_limit = 0;
3289
3290 freq = wpa_s->assoc_freq;
3291 bss = wpa_bss_get_bssid(wpa_s, dst);
3292 if (bss)
3293 freq = bss->freq;
3294 if (freq <= 0)
3295 return -1;
3296
3297 wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
3298 MAC2STR(dst), freq);
3299 wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
3300 wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
3301
3302 len = 3 + wpabuf_len(adv_proto) + 2;
3303 if (query)
3304 len += wpabuf_len(query);
3305 buf = gas_build_initial_req(0, len);
3306 if (buf == NULL)
3307 return -1;
3308
3309 /* Advertisement Protocol IE */
3310 wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3311 wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3312 wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3313 wpabuf_put_buf(buf, adv_proto);
3314
3315 /* GAS Query */
3316 if (query) {
3317 wpabuf_put_le16(buf, wpabuf_len(query));
3318 wpabuf_put_buf(buf, query);
3319 } else
3320 wpabuf_put_le16(buf, 0);
3321
3322 res = gas_query_req(wpa_s->gas, dst, freq, 0, 0, buf, gas_resp_cb,
3323 wpa_s);
3324 if (res < 0) {
3325 wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
3326 wpabuf_free(buf);
3327 ret = -1;
3328 } else
3329 wpa_msg(wpa_s, MSG_DEBUG,
3330 "GAS: Query started with dialog token %u", res);
3331
3332 return ret;
3333 }
3334