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->roaming_consortium_len == 0 ||
1392 !roaming_consortium_match(ie, anqp,
1393 cred->roaming_consortium,
1394 cred->roaming_consortium_len)) &&
1395 !cred_roaming_consortiums_match(ie, anqp, cred))
1396 continue;
1397
1398 if (cred_no_required_oi_match(cred, bss))
1399 continue;
1400 if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1401 continue;
1402 if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1403 continue;
1404 if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1405 continue;
1406 if (cred_excluded_ssid(cred, bss)) {
1407 if (excluded == NULL)
1408 continue;
1409 if (selected == NULL) {
1410 selected = cred;
1411 is_excluded = 1;
1412 }
1413 } else {
1414 if (selected == NULL || is_excluded ||
1415 cred_prio_cmp(selected, cred) < 0) {
1416 selected = cred;
1417 is_excluded = 0;
1418 }
1419 }
1420 }
1421
1422 if (excluded)
1423 *excluded = is_excluded;
1424
1425 return selected;
1426 }
1427
1428
interworking_set_eap_params(struct wpa_ssid * ssid,struct wpa_cred * cred,int ttls)1429 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1430 struct wpa_cred *cred, int ttls)
1431 {
1432 if (cred->eap_method) {
1433 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1434 cred->eap_method->method == EAP_TYPE_TTLS;
1435
1436 os_free(ssid->eap.eap_methods);
1437 ssid->eap.eap_methods =
1438 os_malloc(sizeof(struct eap_method_type) * 2);
1439 if (ssid->eap.eap_methods == NULL)
1440 return -1;
1441 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1442 sizeof(*cred->eap_method));
1443 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1444 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1445 }
1446
1447 if (ttls && cred->username && cred->username[0]) {
1448 const char *pos;
1449 char *anon;
1450 /* Use anonymous NAI in Phase 1 */
1451 pos = os_strchr(cred->username, '@');
1452 if (pos) {
1453 size_t buflen = 9 + os_strlen(pos) + 1;
1454 anon = os_malloc(buflen);
1455 if (anon == NULL)
1456 return -1;
1457 os_snprintf(anon, buflen, "anonymous%s", pos);
1458 } else if (cred->realm) {
1459 size_t buflen = 10 + os_strlen(cred->realm) + 1;
1460 anon = os_malloc(buflen);
1461 if (anon == NULL)
1462 return -1;
1463 os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1464 } else {
1465 anon = os_strdup("anonymous");
1466 if (anon == NULL)
1467 return -1;
1468 }
1469 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1470 0) {
1471 os_free(anon);
1472 return -1;
1473 }
1474 os_free(anon);
1475 }
1476
1477 if (!ttls && cred->username && cred->username[0] && cred->realm &&
1478 !os_strchr(cred->username, '@')) {
1479 char *id;
1480 size_t buflen;
1481 int res;
1482
1483 buflen = os_strlen(cred->username) + 1 +
1484 os_strlen(cred->realm) + 1;
1485
1486 id = os_malloc(buflen);
1487 if (!id)
1488 return -1;
1489 os_snprintf(id, buflen, "%s@%s", cred->username, cred->realm);
1490 res = wpa_config_set_quoted(ssid, "identity", id);
1491 os_free(id);
1492 if (res < 0)
1493 return -1;
1494 } else if (cred->username && cred->username[0] &&
1495 wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1496 return -1;
1497
1498 if (cred->password && cred->password[0]) {
1499 if (cred->ext_password &&
1500 wpa_config_set(ssid, "password", cred->password, 0) < 0)
1501 return -1;
1502 if (!cred->ext_password &&
1503 wpa_config_set_quoted(ssid, "password", cred->password) <
1504 0)
1505 return -1;
1506 }
1507
1508 if (cred->client_cert && cred->client_cert[0] &&
1509 wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1510 return -1;
1511
1512 #ifdef ANDROID
1513 if (cred->private_key &&
1514 os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1515 /* Use OpenSSL engine configuration for Android keystore */
1516 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1517 wpa_config_set_quoted(ssid, "key_id",
1518 cred->private_key + 11) < 0 ||
1519 wpa_config_set(ssid, "engine", "1", 0) < 0)
1520 return -1;
1521 } else
1522 #endif /* ANDROID */
1523 if (cred->private_key && cred->private_key[0] &&
1524 wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1525 return -1;
1526
1527 if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1528 wpa_config_set_quoted(ssid, "private_key_passwd",
1529 cred->private_key_passwd) < 0)
1530 return -1;
1531
1532 if (cred->phase1) {
1533 os_free(ssid->eap.phase1);
1534 ssid->eap.phase1 = os_strdup(cred->phase1);
1535 }
1536 if (cred->phase2) {
1537 os_free(ssid->eap.phase2);
1538 ssid->eap.phase2 = os_strdup(cred->phase2);
1539 }
1540
1541 if (cred->ca_cert && cred->ca_cert[0] &&
1542 wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1543 return -1;
1544
1545 if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1546 wpa_config_set_quoted(ssid, "domain_suffix_match",
1547 cred->domain_suffix_match) < 0)
1548 return -1;
1549
1550 ssid->eap.ocsp = cred->ocsp;
1551
1552 return 0;
1553 }
1554
1555
interworking_connect_roaming_consortium(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpa_bss * bss,int only_add)1556 static int interworking_connect_roaming_consortium(
1557 struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1558 struct wpa_bss *bss, int only_add)
1559 {
1560 struct wpa_ssid *ssid;
1561 const u8 *ie;
1562 const struct wpabuf *anqp;
1563 unsigned int i;
1564
1565 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
1566 " based on roaming consortium match", MAC2STR(bss->bssid));
1567
1568 if (already_connected(wpa_s, cred, bss)) {
1569 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1570 MAC2STR(bss->bssid));
1571 return wpa_s->current_ssid->id;
1572 }
1573
1574 remove_duplicate_network(wpa_s, cred, bss);
1575
1576 ssid = wpa_config_add_network(wpa_s->conf);
1577 if (ssid == NULL)
1578 return -1;
1579 ssid->parent_cred = cred;
1580 wpas_notify_network_added(wpa_s, ssid);
1581 wpa_config_set_network_defaults(ssid);
1582 ssid->priority = cred->priority;
1583 ssid->temporary = 1;
1584 ssid->ssid = os_zalloc(bss->ssid_len + 1);
1585 if (ssid->ssid == NULL)
1586 goto fail;
1587 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1588 ssid->ssid_len = bss->ssid_len;
1589
1590 if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1591 goto fail;
1592
1593 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1594 anqp = bss->anqp ? bss->anqp->roaming_consortium : NULL;
1595 for (i = 0; (ie || anqp) && i < cred->num_roaming_consortiums; i++) {
1596 if (!roaming_consortium_match(
1597 ie, anqp, cred->roaming_consortiums[i],
1598 cred->roaming_consortiums_len[i]))
1599 continue;
1600
1601 ssid->roaming_consortium_selection =
1602 os_malloc(cred->roaming_consortiums_len[i]);
1603 if (!ssid->roaming_consortium_selection)
1604 goto fail;
1605 os_memcpy(ssid->roaming_consortium_selection,
1606 cred->roaming_consortiums[i],
1607 cred->roaming_consortiums_len[i]);
1608 ssid->roaming_consortium_selection_len =
1609 cred->roaming_consortiums_len[i];
1610 break;
1611 }
1612
1613 if (cred->eap_method == NULL) {
1614 wpa_msg(wpa_s, MSG_DEBUG,
1615 "Interworking: No EAP method set for credential using roaming consortium");
1616 goto fail;
1617 }
1618
1619 if (interworking_set_eap_params(
1620 ssid, cred,
1621 cred->eap_method->vendor == EAP_VENDOR_IETF &&
1622 cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1623 goto fail;
1624
1625 wpa_s->next_ssid = ssid;
1626 wpa_config_update_prio_list(wpa_s->conf);
1627 if (!only_add)
1628 interworking_reconnect(wpa_s);
1629
1630 return ssid->id;
1631
1632 fail:
1633 wpas_notify_network_removed(wpa_s, ssid);
1634 wpa_config_remove_network(wpa_s->conf, ssid->id);
1635 return -1;
1636 }
1637
1638
interworking_connect(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,int only_add)1639 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
1640 int only_add)
1641 {
1642 struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1643 struct wpa_ssid *ssid;
1644 struct nai_realm *realm;
1645 struct nai_realm_eap *eap = NULL;
1646 u16 count, i;
1647 char buf[100];
1648 int excluded = 0, *excl = &excluded;
1649 const char *name;
1650
1651 if (wpa_s->conf->cred == NULL || bss == NULL)
1652 return -1;
1653 if (disallowed_bssid(wpa_s, bss->bssid) ||
1654 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1655 wpa_msg(wpa_s, MSG_DEBUG,
1656 "Interworking: Reject connection to disallowed BSS "
1657 MACSTR, MAC2STR(bss->bssid));
1658 return -1;
1659 }
1660
1661 wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1662 " for connection",
1663 MAC2STR(bss->bssid));
1664
1665 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1666 /*
1667 * We currently support only HS 2.0 networks and those are
1668 * required to use WPA2-Enterprise.
1669 */
1670 wpa_msg(wpa_s, MSG_DEBUG,
1671 "Interworking: Network does not use RSN");
1672 return -1;
1673 }
1674
1675 cred_rc = interworking_credentials_available_roaming_consortium(
1676 wpa_s, bss, 0, excl);
1677 if (cred_rc) {
1678 wpa_msg(wpa_s, MSG_DEBUG,
1679 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d",
1680 cred_rc->priority, cred_rc->sp_priority);
1681 if (excl && !(*excl))
1682 excl = NULL;
1683 }
1684
1685 cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1686 if (cred) {
1687 wpa_msg(wpa_s, MSG_DEBUG,
1688 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d",
1689 cred->priority, cred->sp_priority);
1690 if (excl && !(*excl))
1691 excl = NULL;
1692 }
1693
1694 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1695 excl);
1696 if (cred_3gpp) {
1697 wpa_msg(wpa_s, MSG_DEBUG,
1698 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d",
1699 cred_3gpp->priority, cred_3gpp->sp_priority);
1700 if (excl && !(*excl))
1701 excl = NULL;
1702 }
1703
1704 if (!cred_rc && !cred && !cred_3gpp) {
1705 wpa_msg(wpa_s, MSG_DEBUG,
1706 "Interworking: No full credential matches - consider options without BW(etc.) limits");
1707 cred_rc = interworking_credentials_available_roaming_consortium(
1708 wpa_s, bss, 1, excl);
1709 if (cred_rc) {
1710 wpa_msg(wpa_s, MSG_DEBUG,
1711 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)",
1712 cred_rc->priority, cred_rc->sp_priority);
1713 if (excl && !(*excl))
1714 excl = NULL;
1715 }
1716
1717 cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1718 excl);
1719 if (cred) {
1720 wpa_msg(wpa_s, MSG_DEBUG,
1721 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)",
1722 cred->priority, cred->sp_priority);
1723 if (excl && !(*excl))
1724 excl = NULL;
1725 }
1726
1727 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1728 1, excl);
1729 if (cred_3gpp) {
1730 wpa_msg(wpa_s, MSG_DEBUG,
1731 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)",
1732 cred_3gpp->priority, cred_3gpp->sp_priority);
1733 if (excl && !(*excl))
1734 excl = NULL;
1735 }
1736 }
1737
1738 if (cred_rc &&
1739 (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1740 (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1741 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1742 bss, only_add);
1743
1744 if (cred_3gpp &&
1745 (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1746 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss,
1747 only_add);
1748 }
1749
1750 if (cred == NULL) {
1751 wpa_msg(wpa_s, MSG_DEBUG,
1752 "Interworking: No matching credentials found for "
1753 MACSTR, MAC2STR(bss->bssid));
1754 return -1;
1755 }
1756
1757 realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1758 &count);
1759 if (realm == NULL) {
1760 wpa_msg(wpa_s, MSG_DEBUG,
1761 "Interworking: Could not parse NAI Realm list from "
1762 MACSTR, MAC2STR(bss->bssid));
1763 return -1;
1764 }
1765
1766 for (i = 0; i < count; i++) {
1767 if (!nai_realm_match(&realm[i], cred->realm))
1768 continue;
1769 eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1770 if (eap)
1771 break;
1772 }
1773
1774 if (!eap) {
1775 wpa_msg(wpa_s, MSG_DEBUG,
1776 "Interworking: No matching credentials and EAP method found for "
1777 MACSTR, MAC2STR(bss->bssid));
1778 nai_realm_free(realm, count);
1779 return -1;
1780 }
1781
1782 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR,
1783 MAC2STR(bss->bssid));
1784
1785 if (already_connected(wpa_s, cred, bss)) {
1786 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1787 MAC2STR(bss->bssid));
1788 nai_realm_free(realm, count);
1789 return 0;
1790 }
1791
1792 remove_duplicate_network(wpa_s, cred, bss);
1793
1794 ssid = wpa_config_add_network(wpa_s->conf);
1795 if (ssid == NULL) {
1796 nai_realm_free(realm, count);
1797 return -1;
1798 }
1799 ssid->parent_cred = cred;
1800 wpas_notify_network_added(wpa_s, ssid);
1801 wpa_config_set_network_defaults(ssid);
1802 ssid->priority = cred->priority;
1803 ssid->temporary = 1;
1804 ssid->ssid = os_zalloc(bss->ssid_len + 1);
1805 if (ssid->ssid == NULL)
1806 goto fail;
1807 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1808 ssid->ssid_len = bss->ssid_len;
1809
1810 if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1811 goto fail;
1812
1813 if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1814 eap->method), 0) < 0)
1815 goto fail;
1816
1817 switch (eap->method) {
1818 case EAP_TYPE_TTLS:
1819 if (eap->inner_method) {
1820 name = eap_get_name(EAP_VENDOR_IETF, eap->inner_method);
1821 if (!name)
1822 goto fail;
1823 os_snprintf(buf, sizeof(buf), "\"autheap=%s\"", name);
1824 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1825 goto fail;
1826 break;
1827 }
1828 switch (eap->inner_non_eap) {
1829 case NAI_REALM_INNER_NON_EAP_PAP:
1830 if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1831 0)
1832 goto fail;
1833 break;
1834 case NAI_REALM_INNER_NON_EAP_CHAP:
1835 if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1836 < 0)
1837 goto fail;
1838 break;
1839 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1840 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1841 0) < 0)
1842 goto fail;
1843 break;
1844 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1845 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1846 0) < 0)
1847 goto fail;
1848 break;
1849 default:
1850 /* EAP params were not set - assume TTLS/MSCHAPv2 */
1851 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1852 0) < 0)
1853 goto fail;
1854 break;
1855 }
1856 break;
1857 case EAP_TYPE_PEAP:
1858 case EAP_TYPE_FAST:
1859 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1860 0) < 0)
1861 goto fail;
1862 if (wpa_config_set(ssid, "pac_file",
1863 "\"blob://pac_interworking\"", 0) < 0)
1864 goto fail;
1865 name = eap_get_name(EAP_VENDOR_IETF,
1866 eap->inner_method ? eap->inner_method :
1867 EAP_TYPE_MSCHAPV2);
1868 if (name == NULL)
1869 goto fail;
1870 os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1871 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1872 goto fail;
1873 break;
1874 case EAP_TYPE_TLS:
1875 break;
1876 }
1877
1878 if (interworking_set_eap_params(ssid, cred,
1879 eap->method == EAP_TYPE_TTLS) < 0)
1880 goto fail;
1881
1882 nai_realm_free(realm, count);
1883
1884 wpa_s->next_ssid = ssid;
1885 wpa_config_update_prio_list(wpa_s->conf);
1886 if (!only_add)
1887 interworking_reconnect(wpa_s);
1888
1889 return ssid->id;
1890
1891 fail:
1892 wpas_notify_network_removed(wpa_s, ssid);
1893 wpa_config_remove_network(wpa_s->conf, ssid->id);
1894 nai_realm_free(realm, count);
1895 return -1;
1896 }
1897
1898
1899 #ifdef PCSC_FUNCS
interworking_pcsc_read_imsi(struct wpa_supplicant * wpa_s)1900 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1901 {
1902 size_t len;
1903
1904 if (wpa_s->imsi[0] && wpa_s->mnc_len)
1905 return 0;
1906
1907 len = sizeof(wpa_s->imsi) - 1;
1908 if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1909 scard_deinit(wpa_s->scard);
1910 wpa_s->scard = NULL;
1911 wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1912 return -1;
1913 }
1914 wpa_s->imsi[len] = '\0';
1915 wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1916 wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1917 wpa_s->imsi, wpa_s->mnc_len);
1918
1919 return 0;
1920 }
1921 #endif /* PCSC_FUNCS */
1922
1923
interworking_credentials_available_3gpp(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,int ignore_bw,int * excluded)1924 static struct wpa_cred * interworking_credentials_available_3gpp(
1925 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1926 int *excluded)
1927 {
1928 struct wpa_cred *selected = NULL;
1929 #ifdef INTERWORKING_3GPP
1930 struct wpa_cred *cred;
1931 int ret;
1932 int is_excluded = 0;
1933
1934 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) {
1935 wpa_msg(wpa_s, MSG_DEBUG,
1936 "interworking-avail-3gpp: not avail, anqp: %p anqp_3gpp: %p",
1937 bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
1938 return NULL;
1939 }
1940
1941 #ifdef CONFIG_EAP_PROXY
1942 if (!wpa_s->imsi[0]) {
1943 size_t len;
1944 wpa_msg(wpa_s, MSG_DEBUG,
1945 "Interworking: IMSI not available - try to read again through eap_proxy");
1946 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol, -1,
1947 wpa_s->imsi,
1948 &len);
1949 if (wpa_s->mnc_len > 0) {
1950 wpa_s->imsi[len] = '\0';
1951 wpa_msg(wpa_s, MSG_DEBUG,
1952 "eap_proxy: IMSI %s (MNC length %d)",
1953 wpa_s->imsi, wpa_s->mnc_len);
1954 } else {
1955 wpa_msg(wpa_s, MSG_DEBUG,
1956 "eap_proxy: IMSI not available");
1957 }
1958 }
1959 #endif /* CONFIG_EAP_PROXY */
1960
1961 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1962 char *sep;
1963 const char *imsi;
1964 int mnc_len;
1965 char imsi_buf[16];
1966 size_t msin_len;
1967
1968 #ifdef PCSC_FUNCS
1969 if (cred->pcsc && wpa_s->scard) {
1970 if (interworking_pcsc_read_imsi(wpa_s) < 0)
1971 continue;
1972 imsi = wpa_s->imsi;
1973 mnc_len = wpa_s->mnc_len;
1974 goto compare;
1975 }
1976 #endif /* PCSC_FUNCS */
1977 #ifdef CONFIG_EAP_PROXY
1978 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1979 imsi = wpa_s->imsi;
1980 mnc_len = wpa_s->mnc_len;
1981 goto compare;
1982 }
1983 #endif /* CONFIG_EAP_PROXY */
1984
1985 if (cred->imsi == NULL || !cred->imsi[0] ||
1986 (!wpa_s->conf->external_sim &&
1987 (cred->milenage == NULL || !cred->milenage[0])))
1988 continue;
1989
1990 sep = os_strchr(cred->imsi, '-');
1991 if (sep == NULL ||
1992 (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1993 continue;
1994 mnc_len = sep - cred->imsi - 3;
1995 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1996 sep++;
1997 msin_len = os_strlen(cred->imsi);
1998 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1999 msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
2000 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
2001 imsi_buf[3 + mnc_len + msin_len] = '\0';
2002 imsi = imsi_buf;
2003
2004 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
2005 compare:
2006 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
2007 wpa_msg(wpa_s, MSG_DEBUG,
2008 "Interworking: Parsing 3GPP info from " MACSTR,
2009 MAC2STR(bss->bssid));
2010 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
2011 wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound",
2012 ret ? "" : "not ");
2013 if (ret) {
2014 if (cred_no_required_oi_match(cred, bss))
2015 continue;
2016 if (!ignore_bw &&
2017 cred_below_min_backhaul(wpa_s, cred, bss))
2018 continue;
2019 if (!ignore_bw &&
2020 cred_over_max_bss_load(wpa_s, cred, bss))
2021 continue;
2022 if (!ignore_bw &&
2023 cred_conn_capab_missing(wpa_s, cred, bss))
2024 continue;
2025 if (cred_excluded_ssid(cred, bss)) {
2026 if (excluded == NULL)
2027 continue;
2028 if (selected == NULL) {
2029 selected = cred;
2030 is_excluded = 1;
2031 }
2032 } else {
2033 if (selected == NULL || is_excluded ||
2034 cred_prio_cmp(selected, cred) < 0) {
2035 selected = cred;
2036 is_excluded = 0;
2037 }
2038 }
2039 }
2040 }
2041
2042 if (excluded)
2043 *excluded = is_excluded;
2044 #endif /* INTERWORKING_3GPP */
2045 return selected;
2046 }
2047
2048
interworking_credentials_available_realm(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,int ignore_bw,int * excluded)2049 static struct wpa_cred * interworking_credentials_available_realm(
2050 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2051 int *excluded)
2052 {
2053 struct wpa_cred *cred, *selected = NULL;
2054 struct nai_realm *realm;
2055 u16 count, i;
2056 int is_excluded = 0;
2057
2058 if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
2059 return NULL;
2060
2061 if (wpa_s->conf->cred == NULL)
2062 return NULL;
2063
2064 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
2065 MACSTR, MAC2STR(bss->bssid));
2066 realm = nai_realm_parse(bss->anqp->nai_realm, &count);
2067 if (realm == NULL) {
2068 wpa_msg(wpa_s, MSG_DEBUG,
2069 "Interworking: Could not parse NAI Realm list from "
2070 MACSTR, MAC2STR(bss->bssid));
2071 return NULL;
2072 }
2073
2074 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2075 if (cred->realm == NULL)
2076 continue;
2077
2078 for (i = 0; i < count; i++) {
2079 if (!nai_realm_match(&realm[i], cred->realm))
2080 continue;
2081 if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2082 if (cred_no_required_oi_match(cred, bss))
2083 continue;
2084 if (!ignore_bw &&
2085 cred_below_min_backhaul(wpa_s, cred, bss))
2086 continue;
2087 if (!ignore_bw &&
2088 cred_over_max_bss_load(wpa_s, cred, bss))
2089 continue;
2090 if (!ignore_bw &&
2091 cred_conn_capab_missing(wpa_s, cred, bss))
2092 continue;
2093 if (cred_excluded_ssid(cred, bss)) {
2094 if (excluded == NULL)
2095 continue;
2096 if (selected == NULL) {
2097 selected = cred;
2098 is_excluded = 1;
2099 }
2100 } else {
2101 if (selected == NULL || is_excluded ||
2102 cred_prio_cmp(selected, cred) < 0)
2103 {
2104 selected = cred;
2105 is_excluded = 0;
2106 }
2107 }
2108 break;
2109 } else {
2110 wpa_msg(wpa_s, MSG_DEBUG,
2111 "Interworking: realm-find-eap returned false");
2112 }
2113 }
2114 }
2115
2116 nai_realm_free(realm, count);
2117
2118 if (excluded)
2119 *excluded = is_excluded;
2120
2121 return selected;
2122 }
2123
2124
interworking_credentials_available_helper(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,int ignore_bw,int * excluded)2125 static struct wpa_cred * interworking_credentials_available_helper(
2126 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2127 int *excluded)
2128 {
2129 struct wpa_cred *cred, *cred2;
2130 int excluded1, excluded2 = 0;
2131
2132 if (disallowed_bssid(wpa_s, bss->bssid) ||
2133 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2134 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2135 MACSTR, MAC2STR(bss->bssid));
2136 return NULL;
2137 }
2138
2139 cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2140 &excluded1);
2141 cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2142 &excluded2);
2143 if (cred && cred2 &&
2144 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2145 cred = cred2;
2146 excluded1 = excluded2;
2147 }
2148 if (!cred) {
2149 cred = cred2;
2150 excluded1 = excluded2;
2151 }
2152
2153 cred2 = interworking_credentials_available_roaming_consortium(
2154 wpa_s, bss, ignore_bw, &excluded2);
2155 if (cred && cred2 &&
2156 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2157 cred = cred2;
2158 excluded1 = excluded2;
2159 }
2160 if (!cred) {
2161 cred = cred2;
2162 excluded1 = excluded2;
2163 }
2164
2165 if (excluded)
2166 *excluded = excluded1;
2167 return cred;
2168 }
2169
2170
interworking_credentials_available(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,int * excluded)2171 static struct wpa_cred * interworking_credentials_available(
2172 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
2173 {
2174 struct wpa_cred *cred;
2175
2176 if (excluded)
2177 *excluded = 0;
2178 cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2179 excluded);
2180 if (cred)
2181 return cred;
2182 return interworking_credentials_available_helper(wpa_s, bss, 1,
2183 excluded);
2184 }
2185
2186
domain_name_list_contains(struct wpabuf * domain_names,const char * domain,int exact_match)2187 int domain_name_list_contains(struct wpabuf *domain_names,
2188 const char *domain, int exact_match)
2189 {
2190 const u8 *pos, *end;
2191 size_t len;
2192
2193 len = os_strlen(domain);
2194 pos = wpabuf_head(domain_names);
2195 end = pos + wpabuf_len(domain_names);
2196
2197 while (end - pos > 1) {
2198 u8 elen;
2199
2200 elen = *pos++;
2201 if (elen > end - pos)
2202 break;
2203
2204 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2205 pos, elen);
2206 if (elen == len &&
2207 os_strncasecmp(domain, (const char *) pos, len) == 0)
2208 return 1;
2209 if (!exact_match && elen > len && pos[elen - len - 1] == '.') {
2210 const char *ap = (const char *) pos;
2211 int offset = elen - len;
2212
2213 if (os_strncasecmp(domain, ap + offset, len) == 0)
2214 return 1;
2215 }
2216
2217 pos += elen;
2218 }
2219
2220 return 0;
2221 }
2222
2223
interworking_home_sp_cred(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpabuf * domain_names)2224 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2225 struct wpa_cred *cred,
2226 struct wpabuf *domain_names)
2227 {
2228 size_t i;
2229 int ret = -1;
2230 #ifdef INTERWORKING_3GPP
2231 char nai[100], *realm;
2232
2233 char *imsi = NULL;
2234 int mnc_len = 0;
2235 if (cred->imsi)
2236 imsi = cred->imsi;
2237 #ifdef PCSC_FUNCS
2238 else if (cred->pcsc && wpa_s->scard) {
2239 if (interworking_pcsc_read_imsi(wpa_s) < 0)
2240 return -1;
2241 imsi = wpa_s->imsi;
2242 mnc_len = wpa_s->mnc_len;
2243 }
2244 #endif /* PCSC_FUNCS */
2245 #ifdef CONFIG_EAP_PROXY
2246 else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2247 imsi = wpa_s->imsi;
2248 mnc_len = wpa_s->mnc_len;
2249 }
2250 #endif /* CONFIG_EAP_PROXY */
2251 if (domain_names &&
2252 imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2253 realm = os_strchr(nai, '@');
2254 if (realm)
2255 realm++;
2256 wpa_msg(wpa_s, MSG_DEBUG,
2257 "Interworking: Search for match with SIM/USIM domain %s",
2258 realm);
2259 if (realm &&
2260 domain_name_list_contains(domain_names, realm, 1))
2261 return 1;
2262 if (realm)
2263 ret = 0;
2264 }
2265 #endif /* INTERWORKING_3GPP */
2266
2267 if (domain_names == NULL || cred->domain == NULL)
2268 return ret;
2269
2270 for (i = 0; i < cred->num_domain; i++) {
2271 wpa_msg(wpa_s, MSG_DEBUG,
2272 "Interworking: Search for match with home SP FQDN %s",
2273 cred->domain[i]);
2274 if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2275 return 1;
2276 }
2277
2278 return 0;
2279 }
2280
2281
interworking_home_sp(struct wpa_supplicant * wpa_s,struct wpabuf * domain_names)2282 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2283 struct wpabuf *domain_names)
2284 {
2285 struct wpa_cred *cred;
2286
2287 if (domain_names == NULL || wpa_s->conf->cred == NULL)
2288 return -1;
2289
2290 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2291 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2292 if (res)
2293 return res;
2294 }
2295
2296 return 0;
2297 }
2298
2299
interworking_find_network_match(struct wpa_supplicant * wpa_s)2300 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2301 {
2302 struct wpa_bss *bss;
2303 struct wpa_ssid *ssid;
2304
2305 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2306 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2307 if (wpas_network_disabled(wpa_s, ssid) ||
2308 ssid->mode != WPAS_MODE_INFRA)
2309 continue;
2310 if (ssid->ssid_len != bss->ssid_len ||
2311 os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2312 0)
2313 continue;
2314 /*
2315 * TODO: Consider more accurate matching of security
2316 * configuration similarly to what is done in events.c
2317 */
2318 return 1;
2319 }
2320 }
2321
2322 return 0;
2323 }
2324
2325
roaming_partner_match(struct wpa_supplicant * wpa_s,struct roaming_partner * partner,struct wpabuf * domain_names)2326 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2327 struct roaming_partner *partner,
2328 struct wpabuf *domain_names)
2329 {
2330 wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2331 partner->fqdn, partner->exact_match, partner->priority,
2332 partner->country);
2333 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2334 wpabuf_head(domain_names),
2335 wpabuf_len(domain_names));
2336 if (!domain_name_list_contains(domain_names, partner->fqdn,
2337 partner->exact_match))
2338 return 0;
2339 /* TODO: match Country */
2340 return 1;
2341 }
2342
2343
roaming_prio(struct wpa_supplicant * wpa_s,struct wpa_cred * cred,struct wpa_bss * bss)2344 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2345 struct wpa_bss *bss)
2346 {
2347 size_t i;
2348
2349 if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
2350 wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2351 return 128; /* cannot check preference with domain name */
2352 }
2353
2354 if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2355 {
2356 wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2357 return 0; /* max preference for home SP network */
2358 }
2359
2360 for (i = 0; i < cred->num_roaming_partner; i++) {
2361 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2362 bss->anqp->domain_name)) {
2363 wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2364 cred->roaming_partner[i].priority);
2365 return cred->roaming_partner[i].priority;
2366 }
2367 }
2368
2369 wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2370 return 128;
2371 }
2372
2373
pick_best_roaming_partner(struct wpa_supplicant * wpa_s,struct wpa_bss * selected,struct wpa_cred * cred)2374 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2375 struct wpa_bss *selected,
2376 struct wpa_cred *cred)
2377 {
2378 struct wpa_bss *bss;
2379 u8 best_prio, prio;
2380 struct wpa_cred *cred2;
2381
2382 /*
2383 * Check if any other BSS is operated by a more preferred roaming
2384 * partner.
2385 */
2386
2387 best_prio = roaming_prio(wpa_s, cred, selected);
2388 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2389 MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2390 cred->id);
2391
2392 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2393 if (bss == selected)
2394 continue;
2395 cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2396 if (!cred2)
2397 continue;
2398 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2399 continue;
2400 prio = roaming_prio(wpa_s, cred2, bss);
2401 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2402 MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2403 cred2->id);
2404 if (prio < best_prio) {
2405 int bh1, bh2, load1, load2, conn1, conn2;
2406 bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2407 load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2408 conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2409 bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2410 load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2411 conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2412 wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d new: %d %d %d",
2413 bh1, load1, conn1, bh2, load2, conn2);
2414 if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2415 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2416 best_prio = prio;
2417 selected = bss;
2418 }
2419 }
2420 }
2421
2422 return selected;
2423 }
2424
2425
interworking_select_network(struct wpa_supplicant * wpa_s)2426 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2427 {
2428 struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2429 struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2430 unsigned int count = 0;
2431 const char *type;
2432 int res;
2433 struct wpa_cred *cred, *selected_cred = NULL;
2434 struct wpa_cred *selected_home_cred = NULL;
2435 struct wpa_cred *selected2_cred = NULL;
2436 struct wpa_cred *selected2_home_cred = NULL;
2437
2438 wpa_s->network_select = 0;
2439
2440 wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2441 wpa_s->auto_select);
2442 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2443 int excluded = 0;
2444 int bh, bss_load, conn_capab;
2445 cred = interworking_credentials_available(wpa_s, bss,
2446 &excluded);
2447 if (!cred)
2448 continue;
2449
2450 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2451 /*
2452 * We currently support only HS 2.0 networks and those
2453 * are required to use WPA2-Enterprise.
2454 */
2455 wpa_msg(wpa_s, MSG_DEBUG,
2456 "Interworking: Credential match with " MACSTR
2457 " but network does not use RSN",
2458 MAC2STR(bss->bssid));
2459 continue;
2460 }
2461 if (!excluded)
2462 count++;
2463 res = interworking_home_sp(wpa_s, bss->anqp ?
2464 bss->anqp->domain_name : NULL);
2465 if (res > 0)
2466 type = "home";
2467 else if (res == 0)
2468 type = "roaming";
2469 else
2470 type = "unknown";
2471 bh = cred_below_min_backhaul(wpa_s, cred, bss);
2472 bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2473 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2474 wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2475 excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2476 MAC2STR(bss->bssid), type,
2477 bh ? " below_min_backhaul=1" : "",
2478 bss_load ? " over_max_bss_load=1" : "",
2479 conn_capab ? " conn_capab_missing=1" : "",
2480 cred->id, cred->priority, cred->sp_priority);
2481 if (excluded)
2482 continue;
2483 if (wpa_s->auto_select ||
2484 (wpa_s->conf->auto_interworking &&
2485 wpa_s->auto_network_select)) {
2486 if (bh || bss_load || conn_capab) {
2487 if (selected2_cred == NULL ||
2488 cred_prio_cmp(cred, selected2_cred) > 0) {
2489 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2490 selected2 = bss;
2491 selected2_cred = cred;
2492 }
2493 if (res > 0 &&
2494 (selected2_home_cred == NULL ||
2495 cred_prio_cmp(cred, selected2_home_cred) >
2496 0)) {
2497 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2498 selected2_home = bss;
2499 selected2_home_cred = cred;
2500 }
2501 } else {
2502 if (selected_cred == NULL ||
2503 cred_prio_cmp(cred, selected_cred) > 0) {
2504 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2505 selected = bss;
2506 selected_cred = cred;
2507 }
2508 if (res > 0 &&
2509 (selected_home_cred == NULL ||
2510 cred_prio_cmp(cred, selected_home_cred) >
2511 0)) {
2512 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2513 selected_home = bss;
2514 selected_home_cred = cred;
2515 }
2516 }
2517 }
2518 }
2519
2520 if (selected_home && selected_home != selected &&
2521 selected_home_cred &&
2522 (selected_cred == NULL ||
2523 cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2524 /* Prefer network operated by the Home SP */
2525 wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2526 selected = selected_home;
2527 selected_cred = selected_home_cred;
2528 }
2529
2530 if (!selected) {
2531 if (selected2_home) {
2532 wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2533 selected = selected2_home;
2534 selected_cred = selected2_home_cred;
2535 } else if (selected2) {
2536 wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2537 selected = selected2;
2538 selected_cred = selected2_cred;
2539 }
2540 }
2541
2542 if (count == 0) {
2543 /*
2544 * No matching network was found based on configured
2545 * credentials. Check whether any of the enabled network blocks
2546 * have matching APs.
2547 */
2548 if (interworking_find_network_match(wpa_s)) {
2549 wpa_msg(wpa_s, MSG_DEBUG,
2550 "Interworking: Possible BSS match for enabled network configurations");
2551 if (wpa_s->auto_select) {
2552 interworking_reconnect(wpa_s);
2553 return;
2554 }
2555 }
2556
2557 if (wpa_s->auto_network_select) {
2558 wpa_msg(wpa_s, MSG_DEBUG,
2559 "Interworking: Continue scanning after ANQP fetch");
2560 wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2561 0);
2562 return;
2563 }
2564
2565 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2566 "with matching credentials found");
2567 if (wpa_s->wpa_state == WPA_SCANNING)
2568 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2569 }
2570
2571 if (selected) {
2572 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2573 MAC2STR(selected->bssid));
2574 selected = pick_best_roaming_partner(wpa_s, selected,
2575 selected_cred);
2576 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2577 " (after best roaming partner selection)",
2578 MAC2STR(selected->bssid));
2579 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2580 MAC2STR(selected->bssid));
2581 interworking_connect(wpa_s, selected, 0);
2582 } else if (wpa_s->wpa_state == WPA_SCANNING)
2583 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2584 }
2585
2586
2587 static struct wpa_bss_anqp *
interworking_match_anqp_info(struct wpa_supplicant * wpa_s,struct wpa_bss * bss)2588 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2589 {
2590 struct wpa_bss *other;
2591
2592 if (is_zero_ether_addr(bss->hessid))
2593 return NULL; /* Cannot be in the same homegenous ESS */
2594
2595 dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2596 if (other == bss)
2597 continue;
2598 if (other->anqp == NULL)
2599 continue;
2600 if (other->anqp->roaming_consortium == NULL &&
2601 other->anqp->nai_realm == NULL &&
2602 other->anqp->anqp_3gpp == NULL &&
2603 other->anqp->domain_name == NULL)
2604 continue;
2605 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2606 continue;
2607 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2608 continue;
2609 if (bss->ssid_len != other->ssid_len ||
2610 os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2611 continue;
2612
2613 wpa_msg(wpa_s, MSG_DEBUG,
2614 "Interworking: Share ANQP data with already fetched BSSID "
2615 MACSTR " and " MACSTR,
2616 MAC2STR(other->bssid), MAC2STR(bss->bssid));
2617 other->anqp->users++;
2618 return other->anqp;
2619 }
2620
2621 return NULL;
2622 }
2623
2624
interworking_next_anqp_fetch(struct wpa_supplicant * wpa_s)2625 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2626 {
2627 struct wpa_bss *bss;
2628 int found = 0;
2629
2630 wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2631 "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2632 wpa_s->fetch_anqp_in_progress,
2633 wpa_s->fetch_osu_icon_in_progress);
2634
2635 if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2636 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2637 return;
2638 }
2639
2640 #ifdef CONFIG_HS20
2641 if (wpa_s->fetch_osu_icon_in_progress) {
2642 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2643 hs20_next_osu_icon(wpa_s);
2644 return;
2645 }
2646 #endif /* CONFIG_HS20 */
2647
2648 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2649 if (!(bss->caps & IEEE80211_CAP_ESS))
2650 continue;
2651 if (!wpa_bss_ext_capab(bss, WLAN_EXT_CAPAB_INTERWORKING))
2652 continue; /* AP does not support Interworking */
2653 if (disallowed_bssid(wpa_s, bss->bssid) ||
2654 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2655 continue; /* Disallowed BSS */
2656
2657 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2658 if (bss->anqp == NULL) {
2659 bss->anqp = interworking_match_anqp_info(wpa_s,
2660 bss);
2661 if (bss->anqp) {
2662 /* Shared data already fetched */
2663 continue;
2664 }
2665 bss->anqp = wpa_bss_anqp_alloc();
2666 if (bss->anqp == NULL)
2667 break;
2668 }
2669 found++;
2670 bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2671 wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2672 MACSTR, MAC2STR(bss->bssid));
2673 interworking_anqp_send_req(wpa_s, bss);
2674 break;
2675 }
2676 }
2677
2678 if (found == 0) {
2679 #ifdef CONFIG_HS20
2680 if (wpa_s->fetch_osu_info) {
2681 if (wpa_s->num_prov_found == 0 &&
2682 wpa_s->fetch_osu_waiting_scan &&
2683 wpa_s->num_osu_scans < 3) {
2684 wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2685 hs20_start_osu_scan(wpa_s);
2686 return;
2687 }
2688 wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2689 hs20_osu_icon_fetch(wpa_s);
2690 return;
2691 }
2692 #endif /* CONFIG_HS20 */
2693 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2694 wpa_s->fetch_anqp_in_progress = 0;
2695 if (wpa_s->network_select)
2696 interworking_select_network(wpa_s);
2697 }
2698 }
2699
2700
interworking_start_fetch_anqp(struct wpa_supplicant * wpa_s)2701 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2702 {
2703 struct wpa_bss *bss;
2704
2705 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2706 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2707
2708 wpa_s->fetch_anqp_in_progress = 1;
2709
2710 /*
2711 * Start actual ANQP operation from eloop call to make sure the loop
2712 * does not end up using excessive recursion.
2713 */
2714 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2715 }
2716
2717
interworking_fetch_anqp(struct wpa_supplicant * wpa_s)2718 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2719 {
2720 if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2721 return 0;
2722
2723 wpa_s->network_select = 0;
2724 wpa_s->fetch_all_anqp = 1;
2725 wpa_s->fetch_osu_info = 0;
2726
2727 interworking_start_fetch_anqp(wpa_s);
2728
2729 return 0;
2730 }
2731
2732
interworking_stop_fetch_anqp(struct wpa_supplicant * wpa_s)2733 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2734 {
2735 if (!wpa_s->fetch_anqp_in_progress)
2736 return;
2737
2738 wpa_s->fetch_anqp_in_progress = 0;
2739 }
2740
2741
anqp_send_req(struct wpa_supplicant * wpa_s,const u8 * dst,u16 info_ids[],size_t num_ids,u32 subtypes,u32 mbo_subtypes)2742 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
2743 u16 info_ids[], size_t num_ids, u32 subtypes,
2744 u32 mbo_subtypes)
2745 {
2746 struct wpabuf *buf;
2747 struct wpabuf *extra_buf = NULL;
2748 int ret = 0;
2749 int freq;
2750 struct wpa_bss *bss;
2751 int res;
2752
2753 bss = wpa_bss_get_bssid(wpa_s, dst);
2754 if (!bss) {
2755 wpa_printf(MSG_WARNING,
2756 "ANQP: Cannot send query to unknown BSS "
2757 MACSTR, MAC2STR(dst));
2758 return -1;
2759 }
2760
2761 wpa_bss_anqp_unshare_alloc(bss);
2762 freq = bss->freq;
2763
2764 wpa_msg(wpa_s, MSG_DEBUG,
2765 "ANQP: Query Request to " MACSTR " for %u id(s)",
2766 MAC2STR(dst), (unsigned int) num_ids);
2767
2768 #ifdef CONFIG_HS20
2769 if (subtypes != 0) {
2770 extra_buf = wpabuf_alloc(100);
2771 if (extra_buf == NULL)
2772 return -1;
2773 hs20_put_anqp_req(subtypes, NULL, 0, extra_buf);
2774 }
2775 #endif /* CONFIG_HS20 */
2776
2777 #ifdef CONFIG_MBO
2778 if (mbo_subtypes) {
2779 struct wpabuf *mbo;
2780
2781 mbo = mbo_build_anqp_buf(wpa_s, bss, mbo_subtypes);
2782 if (mbo) {
2783 if (wpabuf_resize(&extra_buf, wpabuf_len(mbo))) {
2784 wpabuf_free(extra_buf);
2785 wpabuf_free(mbo);
2786 return -1;
2787 }
2788 wpabuf_put_buf(extra_buf, mbo);
2789 wpabuf_free(mbo);
2790 }
2791 }
2792 #endif /* CONFIG_MBO */
2793
2794 buf = anqp_build_req(info_ids, num_ids, extra_buf);
2795 wpabuf_free(extra_buf);
2796 if (buf == NULL)
2797 return -1;
2798
2799 res = gas_query_req(wpa_s->gas, dst, freq, 0, buf, anqp_resp_cb, wpa_s);
2800 if (res < 0) {
2801 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
2802 wpabuf_free(buf);
2803 ret = -1;
2804 } else {
2805 wpa_msg(wpa_s, MSG_DEBUG,
2806 "ANQP: Query started with dialog token %u", res);
2807 }
2808
2809 return ret;
2810 }
2811
2812
anqp_add_extra(struct wpa_supplicant * wpa_s,struct wpa_bss_anqp * anqp,u16 info_id,const u8 * data,size_t slen)2813 static void anqp_add_extra(struct wpa_supplicant *wpa_s,
2814 struct wpa_bss_anqp *anqp, u16 info_id,
2815 const u8 *data, size_t slen)
2816 {
2817 struct wpa_bss_anqp_elem *tmp, *elem = NULL;
2818
2819 if (!anqp)
2820 return;
2821
2822 dl_list_for_each(tmp, &anqp->anqp_elems, struct wpa_bss_anqp_elem,
2823 list) {
2824 if (tmp->infoid == info_id) {
2825 elem = tmp;
2826 break;
2827 }
2828 }
2829
2830 if (!elem) {
2831 elem = os_zalloc(sizeof(*elem));
2832 if (!elem)
2833 return;
2834 elem->infoid = info_id;
2835 dl_list_add(&anqp->anqp_elems, &elem->list);
2836 } else {
2837 wpabuf_free(elem->payload);
2838 }
2839
2840 elem->payload = wpabuf_alloc_copy(data, slen);
2841 if (!elem->payload) {
2842 dl_list_del(&elem->list);
2843 os_free(elem);
2844 }
2845 }
2846
2847
interworking_parse_venue_url(struct wpa_supplicant * wpa_s,const u8 * data,size_t len)2848 static void interworking_parse_venue_url(struct wpa_supplicant *wpa_s,
2849 const u8 *data, size_t len)
2850 {
2851 const u8 *pos = data, *end = data + len;
2852 char url[255];
2853
2854 while (end - pos >= 2) {
2855 u8 slen, num;
2856
2857 slen = *pos++;
2858 if (slen < 1 || slen > end - pos) {
2859 wpa_printf(MSG_DEBUG,
2860 "ANQP: Truncated Venue URL Duple field");
2861 return;
2862 }
2863
2864 num = *pos++;
2865 os_memcpy(url, pos, slen - 1);
2866 url[slen - 1] = '\0';
2867 wpa_msg(wpa_s, MSG_INFO, RX_VENUE_URL "%u %s", num, url);
2868 pos += slen - 1;
2869 }
2870 }
2871
2872
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)2873 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2874 struct wpa_bss *bss, const u8 *sa,
2875 u16 info_id,
2876 const u8 *data, size_t slen,
2877 u8 dialog_token)
2878 {
2879 const u8 *pos = data;
2880 struct wpa_bss_anqp *anqp = NULL;
2881 u8 type;
2882
2883 if (bss)
2884 anqp = bss->anqp;
2885
2886 switch (info_id) {
2887 case ANQP_CAPABILITY_LIST:
2888 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2889 " ANQP Capability list", MAC2STR(sa));
2890 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list",
2891 pos, slen);
2892 if (anqp) {
2893 wpabuf_free(anqp->capability_list);
2894 anqp->capability_list = wpabuf_alloc_copy(pos, slen);
2895 }
2896 break;
2897 case ANQP_VENUE_NAME:
2898 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2899 " Venue Name", MAC2STR(sa));
2900 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2901 if (anqp) {
2902 wpabuf_free(anqp->venue_name);
2903 anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2904 }
2905 break;
2906 case ANQP_NETWORK_AUTH_TYPE:
2907 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2908 " Network Authentication Type information",
2909 MAC2STR(sa));
2910 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2911 "Type", pos, slen);
2912 if (anqp) {
2913 wpabuf_free(anqp->network_auth_type);
2914 anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2915 }
2916 break;
2917 case ANQP_ROAMING_CONSORTIUM:
2918 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2919 " Roaming Consortium list", MAC2STR(sa));
2920 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2921 pos, slen);
2922 if (anqp) {
2923 wpabuf_free(anqp->roaming_consortium);
2924 anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2925 }
2926 break;
2927 case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2928 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2929 " IP Address Type Availability information",
2930 MAC2STR(sa));
2931 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2932 pos, slen);
2933 if (anqp) {
2934 wpabuf_free(anqp->ip_addr_type_availability);
2935 anqp->ip_addr_type_availability =
2936 wpabuf_alloc_copy(pos, slen);
2937 }
2938 break;
2939 case ANQP_NAI_REALM:
2940 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2941 " NAI Realm list", MAC2STR(sa));
2942 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2943 if (anqp) {
2944 wpabuf_free(anqp->nai_realm);
2945 anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2946 }
2947 break;
2948 case ANQP_3GPP_CELLULAR_NETWORK:
2949 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2950 " 3GPP Cellular Network information", MAC2STR(sa));
2951 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2952 pos, slen);
2953 if (anqp) {
2954 wpabuf_free(anqp->anqp_3gpp);
2955 anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2956 }
2957 break;
2958 case ANQP_DOMAIN_NAME:
2959 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2960 " Domain Name list", MAC2STR(sa));
2961 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2962 if (anqp) {
2963 wpabuf_free(anqp->domain_name);
2964 anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2965 }
2966 break;
2967 #ifdef CONFIG_FILS
2968 case ANQP_FILS_REALM_INFO:
2969 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2970 " FILS Realm Information", MAC2STR(sa));
2971 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: FILS Realm Information",
2972 pos, slen);
2973 if (anqp) {
2974 wpabuf_free(anqp->fils_realm_info);
2975 anqp->fils_realm_info = wpabuf_alloc_copy(pos, slen);
2976 }
2977 break;
2978 #endif /* CONFIG_FILS */
2979 case ANQP_VENUE_URL:
2980 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " Venue URL",
2981 MAC2STR(sa));
2982 anqp_add_extra(wpa_s, anqp, info_id, pos, slen);
2983
2984 if (!pmf_in_use(wpa_s, sa)) {
2985 wpa_printf(MSG_DEBUG,
2986 "ANQP: Ignore Venue URL since PMF was not enabled");
2987 break;
2988 }
2989 interworking_parse_venue_url(wpa_s, pos, slen);
2990 break;
2991 case ANQP_VENDOR_SPECIFIC:
2992 if (slen < 3)
2993 return;
2994
2995 switch (WPA_GET_BE24(pos)) {
2996 case OUI_WFA:
2997 pos += 3;
2998 slen -= 3;
2999
3000 if (slen < 1)
3001 return;
3002 type = *pos++;
3003 slen--;
3004
3005 switch (type) {
3006 #ifdef CONFIG_HS20
3007 case HS20_ANQP_OUI_TYPE:
3008 hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
3009 pos, slen,
3010 dialog_token);
3011 break;
3012 #endif /* CONFIG_HS20 */
3013 #ifdef CONFIG_MBO
3014 case MBO_ANQP_OUI_TYPE:
3015 mbo_parse_rx_anqp_resp(wpa_s, bss, sa,
3016 pos, slen);
3017 break;
3018 #endif /* CONFIG_MBO */
3019 default:
3020 wpa_msg(wpa_s, MSG_DEBUG,
3021 "ANQP: Unsupported ANQP vendor type %u",
3022 type);
3023 break;
3024 }
3025 break;
3026 default:
3027 wpa_msg(wpa_s, MSG_DEBUG,
3028 "Interworking: Unsupported vendor-specific ANQP OUI %06x",
3029 WPA_GET_BE24(pos));
3030 return;
3031 }
3032 break;
3033 default:
3034 wpa_msg(wpa_s, MSG_DEBUG,
3035 "Interworking: Unsupported ANQP Info ID %u", info_id);
3036 anqp_add_extra(wpa_s, anqp, info_id, data, slen);
3037 break;
3038 }
3039 }
3040
3041
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)3042 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
3043 enum gas_query_result result,
3044 const struct wpabuf *adv_proto,
3045 const struct wpabuf *resp, u16 status_code)
3046 {
3047 struct wpa_supplicant *wpa_s = ctx;
3048 const u8 *pos;
3049 const u8 *end;
3050 u16 info_id;
3051 u16 slen;
3052 struct wpa_bss *bss = NULL, *tmp;
3053 const char *anqp_result = "SUCCESS";
3054
3055 wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
3056 " dialog_token=%u result=%d status_code=%u",
3057 MAC2STR(dst), dialog_token, result, status_code);
3058 if (result != GAS_QUERY_SUCCESS) {
3059 #ifdef CONFIG_HS20
3060 if (wpa_s->fetch_osu_icon_in_progress)
3061 hs20_icon_fetch_failed(wpa_s);
3062 #endif /* CONFIG_HS20 */
3063 anqp_result = "FAILURE";
3064 goto out;
3065 }
3066
3067 pos = wpabuf_head(adv_proto);
3068 if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
3069 pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
3070 wpa_msg(wpa_s, MSG_DEBUG,
3071 "ANQP: Unexpected Advertisement Protocol in response");
3072 #ifdef CONFIG_HS20
3073 if (wpa_s->fetch_osu_icon_in_progress)
3074 hs20_icon_fetch_failed(wpa_s);
3075 #endif /* CONFIG_HS20 */
3076 anqp_result = "INVALID_FRAME";
3077 goto out;
3078 }
3079
3080 /*
3081 * If possible, select the BSS entry based on which BSS entry was used
3082 * for the request. This can help in cases where multiple BSS entries
3083 * may exist for the same AP.
3084 */
3085 dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
3086 if (tmp == wpa_s->interworking_gas_bss &&
3087 os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
3088 bss = tmp;
3089 break;
3090 }
3091 }
3092 if (bss == NULL)
3093 bss = wpa_bss_get_bssid(wpa_s, dst);
3094
3095 pos = wpabuf_head(resp);
3096 end = pos + wpabuf_len(resp);
3097
3098 while (pos < end) {
3099 unsigned int left = end - pos;
3100
3101 if (left < 4) {
3102 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element");
3103 anqp_result = "INVALID_FRAME";
3104 goto out_parse_done;
3105 }
3106 info_id = WPA_GET_LE16(pos);
3107 pos += 2;
3108 slen = WPA_GET_LE16(pos);
3109 pos += 2;
3110 left -= 4;
3111 if (left < slen) {
3112 wpa_msg(wpa_s, MSG_DEBUG,
3113 "ANQP: Invalid element length for Info ID %u",
3114 info_id);
3115 anqp_result = "INVALID_FRAME";
3116 goto out_parse_done;
3117 }
3118 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
3119 slen, dialog_token);
3120 pos += slen;
3121 }
3122
3123 out_parse_done:
3124 #ifdef CONFIG_HS20
3125 hs20_notify_parse_done(wpa_s);
3126 #endif /* CONFIG_HS20 */
3127 out:
3128 wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
3129 MAC2STR(dst), anqp_result);
3130 wpas_notify_anqp_query_done(wpa_s, dst, anqp_result, bss ? bss->anqp : NULL);
3131 }
3132
3133
interworking_scan_res_handler(struct wpa_supplicant * wpa_s,struct wpa_scan_results * scan_res)3134 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
3135 struct wpa_scan_results *scan_res)
3136 {
3137 wpa_msg(wpa_s, MSG_DEBUG,
3138 "Interworking: Scan results available - start ANQP fetch");
3139 interworking_start_fetch_anqp(wpa_s);
3140 }
3141
3142
interworking_select(struct wpa_supplicant * wpa_s,int auto_select,int * freqs)3143 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
3144 int *freqs)
3145 {
3146 interworking_stop_fetch_anqp(wpa_s);
3147 wpa_s->network_select = 1;
3148 wpa_s->auto_network_select = 0;
3149 wpa_s->auto_select = !!auto_select;
3150 wpa_s->fetch_all_anqp = 0;
3151 wpa_s->fetch_osu_info = 0;
3152 wpa_msg(wpa_s, MSG_DEBUG,
3153 "Interworking: Start scan for network selection");
3154 wpa_s->scan_res_handler = interworking_scan_res_handler;
3155 wpa_s->normal_scans = 0;
3156 wpa_s->scan_req = MANUAL_SCAN_REQ;
3157 os_free(wpa_s->manual_scan_freqs);
3158 wpa_s->manual_scan_freqs = freqs;
3159 wpa_s->after_wps = 0;
3160 wpa_s->known_wps_freq = 0;
3161 wpa_supplicant_req_scan(wpa_s, 0, 0);
3162
3163 return 0;
3164 }
3165
3166
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)3167 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
3168 enum gas_query_result result,
3169 const struct wpabuf *adv_proto,
3170 const struct wpabuf *resp, u16 status_code)
3171 {
3172 struct wpa_supplicant *wpa_s = ctx;
3173 struct wpabuf *n;
3174
3175 wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
3176 " dialog_token=%d status_code=%d resp_len=%d",
3177 MAC2STR(addr), dialog_token, status_code,
3178 resp ? (int) wpabuf_len(resp) : -1);
3179 if (!resp)
3180 return;
3181
3182 n = wpabuf_dup(resp);
3183 if (n == NULL)
3184 return;
3185 wpabuf_free(wpa_s->prev_gas_resp);
3186 wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
3187 os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
3188 wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
3189 wpa_s->last_gas_resp = n;
3190 os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
3191 wpa_s->last_gas_dialog_token = dialog_token;
3192 }
3193
3194
gas_send_request(struct wpa_supplicant * wpa_s,const u8 * dst,const struct wpabuf * adv_proto,const struct wpabuf * query)3195 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
3196 const struct wpabuf *adv_proto,
3197 const struct wpabuf *query)
3198 {
3199 struct wpabuf *buf;
3200 int ret = 0;
3201 int freq;
3202 struct wpa_bss *bss;
3203 int res;
3204 size_t len;
3205 u8 query_resp_len_limit = 0;
3206
3207 freq = wpa_s->assoc_freq;
3208 bss = wpa_bss_get_bssid(wpa_s, dst);
3209 if (bss)
3210 freq = bss->freq;
3211 if (freq <= 0)
3212 return -1;
3213
3214 wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
3215 MAC2STR(dst), freq);
3216 wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
3217 wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
3218
3219 len = 3 + wpabuf_len(adv_proto) + 2;
3220 if (query)
3221 len += wpabuf_len(query);
3222 buf = gas_build_initial_req(0, len);
3223 if (buf == NULL)
3224 return -1;
3225
3226 /* Advertisement Protocol IE */
3227 wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3228 wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3229 wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3230 wpabuf_put_buf(buf, adv_proto);
3231
3232 /* GAS Query */
3233 if (query) {
3234 wpabuf_put_le16(buf, wpabuf_len(query));
3235 wpabuf_put_buf(buf, query);
3236 } else
3237 wpabuf_put_le16(buf, 0);
3238
3239 res = gas_query_req(wpa_s->gas, dst, freq, 0, buf, gas_resp_cb, wpa_s);
3240 if (res < 0) {
3241 wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
3242 wpabuf_free(buf);
3243 ret = -1;
3244 } else
3245 wpa_msg(wpa_s, MSG_DEBUG,
3246 "GAS: Query started with dialog token %u", res);
3247
3248 return ret;
3249 }
3250