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