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