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Interworking: Unshare ANQP results on explicit ANQP requests
[thirdparty/hostap.git] / wpa_supplicant / interworking.c
1 /*
2 * Interworking (IEEE 802.11u)
3 * Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "common/ieee802_11_defs.h"
13 #include "common/gas.h"
14 #include "common/wpa_ctrl.h"
15 #include "utils/pcsc_funcs.h"
16 #include "drivers/driver.h"
17 #include "eap_common/eap_defs.h"
18 #include "eap_peer/eap.h"
19 #include "eap_peer/eap_methods.h"
20 #include "wpa_supplicant_i.h"
21 #include "config.h"
22 #include "config_ssid.h"
23 #include "bss.h"
24 #include "scan.h"
25 #include "notify.h"
26 #include "gas_query.h"
27 #include "hs20_supplicant.h"
28 #include "interworking.h"
29
30
31 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
32 #define INTERWORKING_3GPP
33 #else
34 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
35 #define INTERWORKING_3GPP
36 #else
37 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
38 #define INTERWORKING_3GPP
39 #endif
40 #endif
41 #endif
42
43 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
44
45
46 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
47 {
48 if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
49 wpa_supplicant_cancel_sched_scan(wpa_s);
50 wpa_supplicant_deauthenticate(wpa_s,
51 WLAN_REASON_DEAUTH_LEAVING);
52 }
53 wpa_s->disconnected = 0;
54 wpa_s->reassociate = 1;
55
56 if (wpa_s->last_scan_res_used > 0) {
57 struct os_time now;
58 os_get_time(&now);
59 if (now.sec - wpa_s->last_scan.sec <= 5) {
60 wpa_printf(MSG_DEBUG, "Interworking: Old scan results "
61 "are fresh - connect without new scan");
62 if (wpas_select_network_from_last_scan(wpa_s) >= 0)
63 return;
64 }
65 }
66
67 wpa_supplicant_req_scan(wpa_s, 0, 0);
68 }
69
70
71 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
72 struct wpabuf *extra)
73 {
74 struct wpabuf *buf;
75 size_t i;
76 u8 *len_pos;
77
78 buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
79 (extra ? wpabuf_len(extra) : 0));
80 if (buf == NULL)
81 return NULL;
82
83 len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
84 for (i = 0; i < num_ids; i++)
85 wpabuf_put_le16(buf, info_ids[i]);
86 gas_anqp_set_element_len(buf, len_pos);
87 if (extra)
88 wpabuf_put_buf(buf, extra);
89
90 gas_anqp_set_len(buf);
91
92 return buf;
93 }
94
95
96 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
97 u8 dialog_token,
98 enum gas_query_result result,
99 const struct wpabuf *adv_proto,
100 const struct wpabuf *resp,
101 u16 status_code)
102 {
103 struct wpa_supplicant *wpa_s = ctx;
104
105 anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
106 status_code);
107 interworking_next_anqp_fetch(wpa_s);
108 }
109
110
111 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
112 {
113 struct wpa_cred *cred;
114
115 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
116 if (cred->roaming_consortium_len)
117 return 1;
118 }
119 return 0;
120 }
121
122
123 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
124 {
125 struct wpa_cred *cred;
126
127 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
128 if (cred->pcsc || cred->imsi)
129 return 1;
130 }
131 return 0;
132 }
133
134
135 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
136 {
137 struct wpa_cred *cred;
138
139 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
140 if (cred->pcsc || cred->imsi)
141 continue;
142 if (!cred->eap_method)
143 return 1;
144 if (cred->realm && cred->roaming_consortium_len == 0)
145 return 1;
146 }
147 return 0;
148 }
149
150
151 static int cred_with_domain(struct wpa_supplicant *wpa_s)
152 {
153 struct wpa_cred *cred;
154
155 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
156 if (cred->domain || cred->pcsc || cred->imsi)
157 return 1;
158 }
159 return 0;
160 }
161
162
163 static int additional_roaming_consortiums(struct wpa_bss *bss)
164 {
165 const u8 *ie;
166 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
167 if (ie == NULL || ie[1] == 0)
168 return 0;
169 return ie[2]; /* Number of ANQP OIs */
170 }
171
172
173 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
174 struct wpa_bss *bss)
175 {
176 struct wpabuf *buf;
177 int ret = 0;
178 int res;
179 u16 info_ids[8];
180 size_t num_info_ids = 0;
181 struct wpabuf *extra = NULL;
182 int all = wpa_s->fetch_all_anqp;
183
184 wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
185 MAC2STR(bss->bssid));
186
187 info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
188 if (all) {
189 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
190 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
191 }
192 if (all || (cred_with_roaming_consortium(wpa_s) &&
193 additional_roaming_consortiums(bss)))
194 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
195 if (all)
196 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
197 if (all || cred_with_nai_realm(wpa_s))
198 info_ids[num_info_ids++] = ANQP_NAI_REALM;
199 if (all || cred_with_3gpp(wpa_s))
200 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
201 if (all || cred_with_domain(wpa_s))
202 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
203 wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
204 (u8 *) info_ids, num_info_ids * 2);
205
206 #ifdef CONFIG_HS20
207 if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
208 u8 *len_pos;
209
210 extra = wpabuf_alloc(100);
211 if (!extra)
212 return -1;
213
214 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
215 wpabuf_put_be24(extra, OUI_WFA);
216 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
217 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
218 wpabuf_put_u8(extra, 0); /* Reserved */
219 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
220 if (all) {
221 wpabuf_put_u8(extra,
222 HS20_STYPE_OPERATOR_FRIENDLY_NAME);
223 wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
224 wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
225 wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
226 }
227 gas_anqp_set_element_len(extra, len_pos);
228 }
229 #endif /* CONFIG_HS20 */
230
231 buf = anqp_build_req(info_ids, num_info_ids, extra);
232 wpabuf_free(extra);
233 if (buf == NULL)
234 return -1;
235
236 res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
237 interworking_anqp_resp_cb, wpa_s);
238 if (res < 0) {
239 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
240 ret = -1;
241 } else
242 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
243 "%u", res);
244
245 wpabuf_free(buf);
246 return ret;
247 }
248
249
250 struct nai_realm_eap {
251 u8 method;
252 u8 inner_method;
253 enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
254 u8 cred_type;
255 u8 tunneled_cred_type;
256 };
257
258 struct nai_realm {
259 u8 encoding;
260 char *realm;
261 u8 eap_count;
262 struct nai_realm_eap *eap;
263 };
264
265
266 static void nai_realm_free(struct nai_realm *realms, u16 count)
267 {
268 u16 i;
269
270 if (realms == NULL)
271 return;
272 for (i = 0; i < count; i++) {
273 os_free(realms[i].eap);
274 os_free(realms[i].realm);
275 }
276 os_free(realms);
277 }
278
279
280 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
281 const u8 *end)
282 {
283 u8 elen, auth_count, a;
284 const u8 *e_end;
285
286 if (pos + 3 > end) {
287 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
288 return NULL;
289 }
290
291 elen = *pos++;
292 if (pos + elen > end || elen < 2) {
293 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
294 return NULL;
295 }
296 e_end = pos + elen;
297 e->method = *pos++;
298 auth_count = *pos++;
299 wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
300 elen, e->method, auth_count);
301
302 for (a = 0; a < auth_count; a++) {
303 u8 id, len;
304
305 if (pos + 2 > end || pos + 2 + pos[1] > end) {
306 wpa_printf(MSG_DEBUG, "No room for Authentication "
307 "Parameter subfield");
308 return NULL;
309 }
310
311 id = *pos++;
312 len = *pos++;
313
314 switch (id) {
315 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
316 if (len < 1)
317 break;
318 e->inner_non_eap = *pos;
319 if (e->method != EAP_TYPE_TTLS)
320 break;
321 switch (*pos) {
322 case NAI_REALM_INNER_NON_EAP_PAP:
323 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
324 break;
325 case NAI_REALM_INNER_NON_EAP_CHAP:
326 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
327 break;
328 case NAI_REALM_INNER_NON_EAP_MSCHAP:
329 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
330 break;
331 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
332 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
333 break;
334 }
335 break;
336 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
337 if (len < 1)
338 break;
339 e->inner_method = *pos;
340 wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
341 e->inner_method);
342 break;
343 case NAI_REALM_EAP_AUTH_CRED_TYPE:
344 if (len < 1)
345 break;
346 e->cred_type = *pos;
347 wpa_printf(MSG_DEBUG, "Credential Type: %u",
348 e->cred_type);
349 break;
350 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
351 if (len < 1)
352 break;
353 e->tunneled_cred_type = *pos;
354 wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
355 "Type: %u", e->tunneled_cred_type);
356 break;
357 default:
358 wpa_printf(MSG_DEBUG, "Unsupported Authentication "
359 "Parameter: id=%u len=%u", id, len);
360 wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
361 "Value", pos, len);
362 break;
363 }
364
365 pos += len;
366 }
367
368 return e_end;
369 }
370
371
372 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
373 const u8 *end)
374 {
375 u16 len;
376 const u8 *f_end;
377 u8 realm_len, e;
378
379 if (end - pos < 4) {
380 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
381 "fixed fields");
382 return NULL;
383 }
384
385 len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
386 pos += 2;
387 if (pos + len > end || len < 3) {
388 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
389 "(len=%u; left=%u)",
390 len, (unsigned int) (end - pos));
391 return NULL;
392 }
393 f_end = pos + len;
394
395 r->encoding = *pos++;
396 realm_len = *pos++;
397 if (pos + realm_len > f_end) {
398 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
399 "(len=%u; left=%u)",
400 realm_len, (unsigned int) (f_end - pos));
401 return NULL;
402 }
403 wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
404 r->realm = os_malloc(realm_len + 1);
405 if (r->realm == NULL)
406 return NULL;
407 os_memcpy(r->realm, pos, realm_len);
408 r->realm[realm_len] = '\0';
409 pos += realm_len;
410
411 if (pos + 1 > f_end) {
412 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
413 return NULL;
414 }
415 r->eap_count = *pos++;
416 wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
417 if (pos + r->eap_count * 3 > f_end) {
418 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
419 return NULL;
420 }
421 r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
422 if (r->eap == NULL)
423 return NULL;
424
425 for (e = 0; e < r->eap_count; e++) {
426 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
427 if (pos == NULL)
428 return NULL;
429 }
430
431 return f_end;
432 }
433
434
435 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
436 {
437 struct nai_realm *realm;
438 const u8 *pos, *end;
439 u16 i, num;
440
441 if (anqp == NULL || wpabuf_len(anqp) < 2)
442 return NULL;
443
444 pos = wpabuf_head_u8(anqp);
445 end = pos + wpabuf_len(anqp);
446 num = WPA_GET_LE16(pos);
447 wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
448 pos += 2;
449
450 if (num * 5 > end - pos) {
451 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
452 "enough data (%u octets) for that many realms",
453 num, (unsigned int) (end - pos));
454 return NULL;
455 }
456
457 realm = os_calloc(num, sizeof(struct nai_realm));
458 if (realm == NULL)
459 return NULL;
460
461 for (i = 0; i < num; i++) {
462 pos = nai_realm_parse_realm(&realm[i], pos, end);
463 if (pos == NULL) {
464 nai_realm_free(realm, num);
465 return NULL;
466 }
467 }
468
469 *count = num;
470 return realm;
471 }
472
473
474 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
475 {
476 char *tmp, *pos, *end;
477 int match = 0;
478
479 if (realm->realm == NULL || home_realm == NULL)
480 return 0;
481
482 if (os_strchr(realm->realm, ';') == NULL)
483 return os_strcasecmp(realm->realm, home_realm) == 0;
484
485 tmp = os_strdup(realm->realm);
486 if (tmp == NULL)
487 return 0;
488
489 pos = tmp;
490 while (*pos) {
491 end = os_strchr(pos, ';');
492 if (end)
493 *end = '\0';
494 if (os_strcasecmp(pos, home_realm) == 0) {
495 match = 1;
496 break;
497 }
498 if (end == NULL)
499 break;
500 pos = end + 1;
501 }
502
503 os_free(tmp);
504
505 return match;
506 }
507
508
509 static int nai_realm_cred_username(struct nai_realm_eap *eap)
510 {
511 if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
512 return 0; /* method not supported */
513
514 if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP) {
515 /* Only tunneled methods with username/password supported */
516 return 0;
517 }
518
519 if (eap->method == EAP_TYPE_PEAP &&
520 eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
521 return 0;
522
523 if (eap->method == EAP_TYPE_TTLS) {
524 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
525 return 0;
526 if (eap->inner_method &&
527 eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
528 return 0;
529 if (eap->inner_non_eap &&
530 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
531 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
532 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
533 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
534 return 0;
535 }
536
537 if (eap->inner_method &&
538 eap->inner_method != EAP_TYPE_GTC &&
539 eap->inner_method != EAP_TYPE_MSCHAPV2)
540 return 0;
541
542 return 1;
543 }
544
545
546 static int nai_realm_cred_cert(struct nai_realm_eap *eap)
547 {
548 if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
549 return 0; /* method not supported */
550
551 if (eap->method != EAP_TYPE_TLS) {
552 /* Only EAP-TLS supported for credential authentication */
553 return 0;
554 }
555
556 return 1;
557 }
558
559
560 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
561 struct nai_realm *realm)
562 {
563 u8 e;
564
565 if (cred == NULL ||
566 cred->username == NULL ||
567 cred->username[0] == '\0' ||
568 ((cred->password == NULL ||
569 cred->password[0] == '\0') &&
570 (cred->private_key == NULL ||
571 cred->private_key[0] == '\0')))
572 return NULL;
573
574 for (e = 0; e < realm->eap_count; e++) {
575 struct nai_realm_eap *eap = &realm->eap[e];
576 if (cred->password && cred->password[0] &&
577 nai_realm_cred_username(eap))
578 return eap;
579 if (cred->private_key && cred->private_key[0] &&
580 nai_realm_cred_cert(eap))
581 return eap;
582 }
583
584 return NULL;
585 }
586
587
588 #ifdef INTERWORKING_3GPP
589
590 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
591 {
592 u8 plmn[3];
593 const u8 *pos, *end;
594 u8 udhl;
595
596 /* See Annex A of 3GPP TS 24.234 v8.1.0 for description */
597 plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
598 plmn[1] = imsi[2] - '0';
599 /* default to MNC length 3 if unknown */
600 if (mnc_len != 2)
601 plmn[1] |= (imsi[5] - '0') << 4;
602 else
603 plmn[1] |= 0xf0;
604 plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
605
606 if (anqp == NULL)
607 return 0;
608 pos = wpabuf_head_u8(anqp);
609 end = pos + wpabuf_len(anqp);
610 if (pos + 2 > end)
611 return 0;
612 if (*pos != 0) {
613 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
614 return 0;
615 }
616 pos++;
617 udhl = *pos++;
618 if (pos + udhl > end) {
619 wpa_printf(MSG_DEBUG, "Invalid UDHL");
620 return 0;
621 }
622 end = pos + udhl;
623
624 while (pos + 2 <= end) {
625 u8 iei, len;
626 const u8 *l_end;
627 iei = *pos++;
628 len = *pos++ & 0x7f;
629 if (pos + len > end)
630 break;
631 l_end = pos + len;
632
633 if (iei == 0 && len > 0) {
634 /* PLMN List */
635 u8 num, i;
636 num = *pos++;
637 for (i = 0; i < num; i++) {
638 if (pos + 3 > end)
639 break;
640 if (os_memcmp(pos, plmn, 3) == 0)
641 return 1; /* Found matching PLMN */
642 pos += 3;
643 }
644 }
645
646 pos = l_end;
647 }
648
649 return 0;
650 }
651
652
653 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
654 size_t mnc_len, char prefix)
655 {
656 const char *sep, *msin;
657 char *end, *pos;
658 size_t msin_len, plmn_len;
659
660 /*
661 * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
662 * Root NAI:
663 * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
664 * <MNC> is zero-padded to three digits in case two-digit MNC is used
665 */
666
667 if (imsi == NULL || os_strlen(imsi) > 16) {
668 wpa_printf(MSG_DEBUG, "No valid IMSI available");
669 return -1;
670 }
671 sep = os_strchr(imsi, '-');
672 if (sep) {
673 plmn_len = sep - imsi;
674 msin = sep + 1;
675 } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
676 plmn_len = 3 + mnc_len;
677 msin = imsi + plmn_len;
678 } else
679 return -1;
680 if (plmn_len != 5 && plmn_len != 6)
681 return -1;
682 msin_len = os_strlen(msin);
683
684 pos = nai;
685 end = nai + nai_len;
686 if (prefix)
687 *pos++ = prefix;
688 os_memcpy(pos, imsi, plmn_len);
689 pos += plmn_len;
690 os_memcpy(pos, msin, msin_len);
691 pos += msin_len;
692 pos += os_snprintf(pos, end - pos, "@wlan.mnc");
693 if (plmn_len == 5) {
694 *pos++ = '0';
695 *pos++ = imsi[3];
696 *pos++ = imsi[4];
697 } else {
698 *pos++ = imsi[3];
699 *pos++ = imsi[4];
700 *pos++ = imsi[5];
701 }
702 pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
703 imsi[0], imsi[1], imsi[2]);
704
705 return 0;
706 }
707
708
709 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
710 {
711 char nai[100];
712 if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
713 return -1;
714 return wpa_config_set_quoted(ssid, "identity", nai);
715 }
716
717 #endif /* INTERWORKING_3GPP */
718
719
720 static int interworking_set_hs20_params(struct wpa_ssid *ssid)
721 {
722 if (wpa_config_set(ssid, "key_mgmt", "WPA-EAP", 0) < 0)
723 return -1;
724 if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
725 return -1;
726 if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
727 return -1;
728 return 0;
729 }
730
731
732 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
733 struct wpa_bss *bss)
734 {
735 #ifdef INTERWORKING_3GPP
736 struct wpa_cred *cred;
737 struct wpa_ssid *ssid;
738 const u8 *ie;
739 int eap_type;
740 int res;
741 char prefix;
742
743 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
744 return -1;
745
746 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
747 char *sep;
748 const char *imsi;
749 int mnc_len;
750
751 #ifdef PCSC_FUNCS
752 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
753 wpa_s->imsi[0]) {
754 imsi = wpa_s->imsi;
755 mnc_len = wpa_s->mnc_len;
756 goto compare;
757 }
758 #endif /* PCSC_FUNCS */
759
760 if (cred->imsi == NULL || !cred->imsi[0] ||
761 cred->milenage == NULL || !cred->milenage[0])
762 continue;
763
764 sep = os_strchr(cred->imsi, '-');
765 if (sep == NULL ||
766 (sep - cred->imsi != 5 && sep - cred->imsi != 6))
767 continue;
768 mnc_len = sep - cred->imsi - 3;
769 imsi = cred->imsi;
770
771 #ifdef PCSC_FUNCS
772 compare:
773 #endif /* PCSC_FUNCS */
774 if (plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len))
775 break;
776 }
777 if (cred == NULL)
778 return -1;
779
780 ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
781 if (ie == NULL)
782 return -1;
783 wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
784 MAC2STR(bss->bssid));
785
786 ssid = wpa_config_add_network(wpa_s->conf);
787 if (ssid == NULL)
788 return -1;
789
790 wpas_notify_network_added(wpa_s, ssid);
791 wpa_config_set_network_defaults(ssid);
792 ssid->priority = cred->priority;
793 ssid->temporary = 1;
794 ssid->ssid = os_zalloc(ie[1] + 1);
795 if (ssid->ssid == NULL)
796 goto fail;
797 os_memcpy(ssid->ssid, ie + 2, ie[1]);
798 ssid->ssid_len = ie[1];
799
800 if (interworking_set_hs20_params(ssid) < 0)
801 goto fail;
802
803 eap_type = EAP_TYPE_SIM;
804 if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
805 eap_type = EAP_TYPE_AKA;
806 if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
807 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
808 cred->eap_method[0].method == EAP_TYPE_AKA ||
809 cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
810 eap_type = cred->eap_method[0].method;
811 }
812
813 switch (eap_type) {
814 case EAP_TYPE_SIM:
815 prefix = '1';
816 res = wpa_config_set(ssid, "eap", "SIM", 0);
817 break;
818 case EAP_TYPE_AKA:
819 prefix = '0';
820 res = wpa_config_set(ssid, "eap", "AKA", 0);
821 break;
822 case EAP_TYPE_AKA_PRIME:
823 prefix = '6';
824 res = wpa_config_set(ssid, "eap", "AKA'", 0);
825 break;
826 default:
827 res = -1;
828 break;
829 }
830 if (res < 0) {
831 wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported",
832 eap_type);
833 goto fail;
834 }
835
836 if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
837 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
838 goto fail;
839 }
840
841 if (cred->milenage && cred->milenage[0]) {
842 if (wpa_config_set_quoted(ssid, "password",
843 cred->milenage) < 0)
844 goto fail;
845 } else if (cred->pcsc) {
846 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
847 goto fail;
848 if (wpa_s->conf->pcsc_pin &&
849 wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
850 < 0)
851 goto fail;
852 }
853
854 if (cred->password && cred->password[0] &&
855 wpa_config_set_quoted(ssid, "password", cred->password) < 0)
856 goto fail;
857
858 wpa_config_update_prio_list(wpa_s->conf);
859 interworking_reconnect(wpa_s);
860
861 return 0;
862
863 fail:
864 wpas_notify_network_removed(wpa_s, ssid);
865 wpa_config_remove_network(wpa_s->conf, ssid->id);
866 #endif /* INTERWORKING_3GPP */
867 return -1;
868 }
869
870
871 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
872 size_t rc_len)
873 {
874 const u8 *pos, *end;
875 u8 lens;
876
877 if (ie == NULL)
878 return 0;
879
880 pos = ie + 2;
881 end = ie + 2 + ie[1];
882
883 /* Roaming Consortium element:
884 * Number of ANQP OIs
885 * OI #1 and #2 lengths
886 * OI #1, [OI #2], [OI #3]
887 */
888
889 if (pos + 2 > end)
890 return 0;
891
892 pos++; /* skip Number of ANQP OIs */
893 lens = *pos++;
894 if (pos + (lens & 0x0f) + (lens >> 4) > end)
895 return 0;
896
897 if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
898 return 1;
899 pos += lens & 0x0f;
900
901 if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
902 return 1;
903 pos += lens >> 4;
904
905 if (pos < end && (size_t) (end - pos) == rc_len &&
906 os_memcmp(pos, rc_id, rc_len) == 0)
907 return 1;
908
909 return 0;
910 }
911
912
913 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
914 const u8 *rc_id, size_t rc_len)
915 {
916 const u8 *pos, *end;
917 u8 len;
918
919 if (anqp == NULL)
920 return 0;
921
922 pos = wpabuf_head(anqp);
923 end = pos + wpabuf_len(anqp);
924
925 /* Set of <OI Length, OI> duples */
926 while (pos < end) {
927 len = *pos++;
928 if (pos + len > end)
929 break;
930 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
931 return 1;
932 pos += len;
933 }
934
935 return 0;
936 }
937
938
939 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
940 const u8 *rc_id, size_t rc_len)
941 {
942 return roaming_consortium_element_match(ie, rc_id, rc_len) ||
943 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
944 }
945
946
947 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
948 struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
949 {
950 struct wpa_cred *cred, *selected = NULL;
951 const u8 *ie;
952
953 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
954
955 if (ie == NULL &&
956 (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
957 return NULL;
958
959 if (wpa_s->conf->cred == NULL)
960 return NULL;
961
962 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
963 if (cred->roaming_consortium_len == 0)
964 continue;
965
966 if (!roaming_consortium_match(ie,
967 bss->anqp ?
968 bss->anqp->roaming_consortium :
969 NULL,
970 cred->roaming_consortium,
971 cred->roaming_consortium_len))
972 continue;
973
974 if (selected == NULL ||
975 selected->priority < cred->priority)
976 selected = cred;
977 }
978
979 return selected;
980 }
981
982
983 static int interworking_set_eap_params(struct wpa_ssid *ssid,
984 struct wpa_cred *cred, int ttls)
985 {
986 if (cred->eap_method) {
987 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
988 cred->eap_method->method == EAP_TYPE_TTLS;
989
990 os_free(ssid->eap.eap_methods);
991 ssid->eap.eap_methods =
992 os_malloc(sizeof(struct eap_method_type) * 2);
993 if (ssid->eap.eap_methods == NULL)
994 return -1;
995 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
996 sizeof(*cred->eap_method));
997 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
998 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
999 }
1000
1001 if (ttls && cred->username && cred->username[0]) {
1002 const char *pos;
1003 char *anon;
1004 /* Use anonymous NAI in Phase 1 */
1005 pos = os_strchr(cred->username, '@');
1006 if (pos) {
1007 size_t buflen = 9 + os_strlen(pos) + 1;
1008 anon = os_malloc(buflen);
1009 if (anon == NULL)
1010 return -1;
1011 os_snprintf(anon, buflen, "anonymous%s", pos);
1012 } else if (cred->realm) {
1013 size_t buflen = 10 + os_strlen(cred->realm) + 1;
1014 anon = os_malloc(buflen);
1015 if (anon == NULL)
1016 return -1;
1017 os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1018 } else {
1019 anon = os_strdup("anonymous");
1020 if (anon == NULL)
1021 return -1;
1022 }
1023 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1024 0) {
1025 os_free(anon);
1026 return -1;
1027 }
1028 os_free(anon);
1029 }
1030
1031 if (cred->username && cred->username[0] &&
1032 wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1033 return -1;
1034
1035 if (cred->password && cred->password[0]) {
1036 if (cred->ext_password &&
1037 wpa_config_set(ssid, "password", cred->password, 0) < 0)
1038 return -1;
1039 if (!cred->ext_password &&
1040 wpa_config_set_quoted(ssid, "password", cred->password) <
1041 0)
1042 return -1;
1043 }
1044
1045 if (cred->client_cert && cred->client_cert[0] &&
1046 wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1047 return -1;
1048
1049 #ifdef ANDROID
1050 if (cred->private_key &&
1051 os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1052 /* Use OpenSSL engine configuration for Android keystore */
1053 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1054 wpa_config_set_quoted(ssid, "key_id",
1055 cred->private_key + 11) < 0 ||
1056 wpa_config_set(ssid, "engine", "1", 0) < 0)
1057 return -1;
1058 } else
1059 #endif /* ANDROID */
1060 if (cred->private_key && cred->private_key[0] &&
1061 wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1062 return -1;
1063
1064 if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1065 wpa_config_set_quoted(ssid, "private_key_passwd",
1066 cred->private_key_passwd) < 0)
1067 return -1;
1068
1069 if (cred->phase1) {
1070 os_free(ssid->eap.phase1);
1071 ssid->eap.phase1 = os_strdup(cred->phase1);
1072 }
1073 if (cred->phase2) {
1074 os_free(ssid->eap.phase2);
1075 ssid->eap.phase2 = os_strdup(cred->phase2);
1076 }
1077
1078 if (cred->ca_cert && cred->ca_cert[0] &&
1079 wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1080 return -1;
1081
1082 return 0;
1083 }
1084
1085
1086 static int interworking_connect_roaming_consortium(
1087 struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1088 struct wpa_bss *bss, const u8 *ssid_ie)
1089 {
1090 struct wpa_ssid *ssid;
1091
1092 wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1093 "roaming consortium match", MAC2STR(bss->bssid));
1094
1095 ssid = wpa_config_add_network(wpa_s->conf);
1096 if (ssid == NULL)
1097 return -1;
1098 wpas_notify_network_added(wpa_s, ssid);
1099 wpa_config_set_network_defaults(ssid);
1100 ssid->priority = cred->priority;
1101 ssid->temporary = 1;
1102 ssid->ssid = os_zalloc(ssid_ie[1] + 1);
1103 if (ssid->ssid == NULL)
1104 goto fail;
1105 os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
1106 ssid->ssid_len = ssid_ie[1];
1107
1108 if (interworking_set_hs20_params(ssid) < 0)
1109 goto fail;
1110
1111 if (cred->eap_method == NULL) {
1112 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1113 "credential using roaming consortium");
1114 goto fail;
1115 }
1116
1117 if (interworking_set_eap_params(
1118 ssid, cred,
1119 cred->eap_method->vendor == EAP_VENDOR_IETF &&
1120 cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1121 goto fail;
1122
1123 wpa_config_update_prio_list(wpa_s->conf);
1124 interworking_reconnect(wpa_s);
1125
1126 return 0;
1127
1128 fail:
1129 wpas_notify_network_removed(wpa_s, ssid);
1130 wpa_config_remove_network(wpa_s->conf, ssid->id);
1131 return -1;
1132 }
1133
1134
1135 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1136 {
1137 struct wpa_cred *cred;
1138 struct wpa_ssid *ssid;
1139 struct nai_realm *realm;
1140 struct nai_realm_eap *eap = NULL;
1141 u16 count, i;
1142 char buf[100];
1143 const u8 *ie;
1144
1145 if (wpa_s->conf->cred == NULL || bss == NULL)
1146 return -1;
1147 ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1148 if (ie == NULL || ie[1] == 0) {
1149 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1150 MACSTR, MAC2STR(bss->bssid));
1151 return -1;
1152 }
1153
1154 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1155 /*
1156 * We currently support only HS 2.0 networks and those are
1157 * required to use WPA2-Enterprise.
1158 */
1159 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1160 "RSN");
1161 return -1;
1162 }
1163
1164 cred = interworking_credentials_available_roaming_consortium(wpa_s,
1165 bss);
1166 if (cred)
1167 return interworking_connect_roaming_consortium(wpa_s, cred,
1168 bss, ie);
1169
1170 realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1171 &count);
1172 if (realm == NULL) {
1173 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1174 "Realm list from " MACSTR, MAC2STR(bss->bssid));
1175 count = 0;
1176 }
1177
1178 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1179 for (i = 0; i < count; i++) {
1180 if (!nai_realm_match(&realm[i], cred->realm))
1181 continue;
1182 eap = nai_realm_find_eap(cred, &realm[i]);
1183 if (eap)
1184 break;
1185 }
1186 if (eap)
1187 break;
1188 }
1189
1190 if (!eap) {
1191 if (interworking_connect_3gpp(wpa_s, bss) == 0) {
1192 if (realm)
1193 nai_realm_free(realm, count);
1194 return 0;
1195 }
1196
1197 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1198 "and EAP method found for " MACSTR,
1199 MAC2STR(bss->bssid));
1200 nai_realm_free(realm, count);
1201 return -1;
1202 }
1203
1204 wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1205 MAC2STR(bss->bssid));
1206
1207 ssid = wpa_config_add_network(wpa_s->conf);
1208 if (ssid == NULL) {
1209 nai_realm_free(realm, count);
1210 return -1;
1211 }
1212 wpas_notify_network_added(wpa_s, ssid);
1213 wpa_config_set_network_defaults(ssid);
1214 ssid->priority = cred->priority;
1215 ssid->temporary = 1;
1216 ssid->ssid = os_zalloc(ie[1] + 1);
1217 if (ssid->ssid == NULL)
1218 goto fail;
1219 os_memcpy(ssid->ssid, ie + 2, ie[1]);
1220 ssid->ssid_len = ie[1];
1221
1222 if (interworking_set_hs20_params(ssid) < 0)
1223 goto fail;
1224
1225 if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1226 eap->method), 0) < 0)
1227 goto fail;
1228
1229 switch (eap->method) {
1230 case EAP_TYPE_TTLS:
1231 if (eap->inner_method) {
1232 os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1233 eap_get_name(EAP_VENDOR_IETF,
1234 eap->inner_method));
1235 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1236 goto fail;
1237 break;
1238 }
1239 switch (eap->inner_non_eap) {
1240 case NAI_REALM_INNER_NON_EAP_PAP:
1241 if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1242 0)
1243 goto fail;
1244 break;
1245 case NAI_REALM_INNER_NON_EAP_CHAP:
1246 if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1247 < 0)
1248 goto fail;
1249 break;
1250 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1251 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1252 0) < 0)
1253 goto fail;
1254 break;
1255 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1256 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1257 0) < 0)
1258 goto fail;
1259 break;
1260 }
1261 break;
1262 case EAP_TYPE_PEAP:
1263 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1264 eap_get_name(EAP_VENDOR_IETF, eap->inner_method));
1265 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1266 goto fail;
1267 break;
1268 case EAP_TYPE_TLS:
1269 break;
1270 }
1271
1272 if (interworking_set_eap_params(ssid, cred,
1273 eap->method == EAP_TYPE_TTLS) < 0)
1274 goto fail;
1275
1276 nai_realm_free(realm, count);
1277
1278 wpa_config_update_prio_list(wpa_s->conf);
1279 interworking_reconnect(wpa_s);
1280
1281 return 0;
1282
1283 fail:
1284 wpas_notify_network_removed(wpa_s, ssid);
1285 wpa_config_remove_network(wpa_s->conf, ssid->id);
1286 nai_realm_free(realm, count);
1287 return -1;
1288 }
1289
1290
1291 static struct wpa_cred * interworking_credentials_available_3gpp(
1292 struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1293 {
1294 struct wpa_cred *cred, *selected = NULL;
1295 int ret;
1296
1297 #ifdef INTERWORKING_3GPP
1298 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1299 return NULL;
1300
1301 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1302 char *sep;
1303 const char *imsi;
1304 int mnc_len;
1305
1306 #ifdef PCSC_FUNCS
1307 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1308 wpa_s->imsi[0]) {
1309 imsi = wpa_s->imsi;
1310 mnc_len = wpa_s->mnc_len;
1311 goto compare;
1312 }
1313 #endif /* PCSC_FUNCS */
1314
1315 if (cred->imsi == NULL || !cred->imsi[0] ||
1316 cred->milenage == NULL || !cred->milenage[0])
1317 continue;
1318
1319 sep = os_strchr(cred->imsi, '-');
1320 if (sep == NULL ||
1321 (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1322 continue;
1323 mnc_len = sep - cred->imsi - 3;
1324 imsi = cred->imsi;
1325
1326 #ifdef PCSC_FUNCS
1327 compare:
1328 #endif /* PCSC_FUNCS */
1329 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1330 MACSTR, MAC2STR(bss->bssid));
1331 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1332 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1333 if (ret) {
1334 if (selected == NULL ||
1335 selected->priority < cred->priority)
1336 selected = cred;
1337 }
1338 }
1339 #endif /* INTERWORKING_3GPP */
1340 return selected;
1341 }
1342
1343
1344 static struct wpa_cred * interworking_credentials_available_realm(
1345 struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1346 {
1347 struct wpa_cred *cred, *selected = NULL;
1348 struct nai_realm *realm;
1349 u16 count, i;
1350
1351 if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1352 return NULL;
1353
1354 if (wpa_s->conf->cred == NULL)
1355 return NULL;
1356
1357 wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1358 MACSTR, MAC2STR(bss->bssid));
1359 realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1360 if (realm == NULL) {
1361 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1362 "Realm list from " MACSTR, MAC2STR(bss->bssid));
1363 return NULL;
1364 }
1365
1366 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1367 if (cred->realm == NULL)
1368 continue;
1369
1370 for (i = 0; i < count; i++) {
1371 if (!nai_realm_match(&realm[i], cred->realm))
1372 continue;
1373 if (nai_realm_find_eap(cred, &realm[i])) {
1374 if (selected == NULL ||
1375 selected->priority < cred->priority)
1376 selected = cred;
1377 break;
1378 }
1379 }
1380 }
1381
1382 nai_realm_free(realm, count);
1383
1384 return selected;
1385 }
1386
1387
1388 static struct wpa_cred * interworking_credentials_available(
1389 struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1390 {
1391 struct wpa_cred *cred, *cred2;
1392
1393 cred = interworking_credentials_available_realm(wpa_s, bss);
1394 cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1395 if (cred && cred2 && cred2->priority >= cred->priority)
1396 cred = cred2;
1397 if (!cred)
1398 cred = cred2;
1399
1400 cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1401 bss);
1402 if (cred && cred2 && cred2->priority >= cred->priority)
1403 cred = cred2;
1404 if (!cred)
1405 cred = cred2;
1406
1407 return cred;
1408 }
1409
1410
1411 static int domain_name_list_contains(struct wpabuf *domain_names,
1412 const char *domain)
1413 {
1414 const u8 *pos, *end;
1415 size_t len;
1416
1417 len = os_strlen(domain);
1418 pos = wpabuf_head(domain_names);
1419 end = pos + wpabuf_len(domain_names);
1420
1421 while (pos + 1 < end) {
1422 if (pos + 1 + pos[0] > end)
1423 break;
1424
1425 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1426 pos + 1, pos[0]);
1427 if (pos[0] == len &&
1428 os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1429 return 1;
1430
1431 pos += 1 + pos[0];
1432 }
1433
1434 return 0;
1435 }
1436
1437
1438 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1439 struct wpabuf *domain_names)
1440 {
1441 struct wpa_cred *cred;
1442 #ifdef INTERWORKING_3GPP
1443 char nai[100], *realm;
1444 #endif /* INTERWORKING_3GPP */
1445
1446 if (domain_names == NULL || wpa_s->conf->cred == NULL)
1447 return -1;
1448
1449 for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1450 #ifdef INTERWORKING_3GPP
1451 char *imsi = NULL;
1452 int mnc_len = 0;
1453 if (cred->imsi)
1454 imsi = cred->imsi;
1455 #ifdef CONFIG_PCSC
1456 else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1457 wpa_s->scard && wpa_s->imsi[0]) {
1458 imsi = wpa_s->imsi;
1459 mnc_len = wpa_s->mnc_len;
1460 }
1461 #endif /* CONFIG_PCSC */
1462 if (imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0)
1463 == 0) {
1464 realm = os_strchr(nai, '@');
1465 if (realm)
1466 realm++;
1467 wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1468 "with SIM/USIM domain %s", realm);
1469 if (realm &&
1470 domain_name_list_contains(domain_names, realm))
1471 return 1;
1472 }
1473 #endif /* INTERWORKING_3GPP */
1474
1475 if (cred->domain == NULL)
1476 continue;
1477
1478 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1479 "home SP FQDN %s", cred->domain);
1480 if (domain_name_list_contains(domain_names, cred->domain))
1481 return 1;
1482 }
1483
1484 return 0;
1485 }
1486
1487
1488 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1489 {
1490 struct wpa_bss *bss;
1491 struct wpa_ssid *ssid;
1492
1493 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1494 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1495 if (wpas_network_disabled(wpa_s, ssid) ||
1496 ssid->mode != WPAS_MODE_INFRA)
1497 continue;
1498 if (ssid->ssid_len != bss->ssid_len ||
1499 os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1500 0)
1501 continue;
1502 /*
1503 * TODO: Consider more accurate matching of security
1504 * configuration similarly to what is done in events.c
1505 */
1506 return 1;
1507 }
1508 }
1509
1510 return 0;
1511 }
1512
1513
1514 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1515 {
1516 struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1517 int selected_prio = -999999, selected_home_prio = -999999;
1518 unsigned int count = 0;
1519 const char *type;
1520 int res;
1521 struct wpa_cred *cred;
1522
1523 wpa_s->network_select = 0;
1524
1525 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1526 cred = interworking_credentials_available(wpa_s, bss);
1527 if (!cred)
1528 continue;
1529 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1530 /*
1531 * We currently support only HS 2.0 networks and those
1532 * are required to use WPA2-Enterprise.
1533 */
1534 wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1535 "with " MACSTR " but network does not use "
1536 "RSN", MAC2STR(bss->bssid));
1537 continue;
1538 }
1539 count++;
1540 res = interworking_home_sp(wpa_s, bss->anqp ?
1541 bss->anqp->domain_name : NULL);
1542 if (res > 0)
1543 type = "home";
1544 else if (res == 0)
1545 type = "roaming";
1546 else
1547 type = "unknown";
1548 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1549 MAC2STR(bss->bssid), type);
1550 if (wpa_s->auto_select ||
1551 (wpa_s->conf->auto_interworking &&
1552 wpa_s->auto_network_select)) {
1553 if (selected == NULL ||
1554 cred->priority > selected_prio) {
1555 selected = bss;
1556 selected_prio = cred->priority;
1557 }
1558 if (res > 0 &&
1559 (selected_home == NULL ||
1560 cred->priority > selected_home_prio)) {
1561 selected_home = bss;
1562 selected_home_prio = cred->priority;
1563 }
1564 }
1565 }
1566
1567 if (selected_home && selected_home != selected &&
1568 selected_home_prio >= selected_prio) {
1569 /* Prefer network operated by the Home SP */
1570 selected = selected_home;
1571 }
1572
1573 if (count == 0) {
1574 /*
1575 * No matching network was found based on configured
1576 * credentials. Check whether any of the enabled network blocks
1577 * have matching APs.
1578 */
1579 if (interworking_find_network_match(wpa_s)) {
1580 wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1581 "match for enabled network configurations");
1582 if (wpa_s->auto_select)
1583 interworking_reconnect(wpa_s);
1584 return;
1585 }
1586
1587 if (wpa_s->auto_network_select) {
1588 wpa_printf(MSG_DEBUG, "Interworking: Continue "
1589 "scanning after ANQP fetch");
1590 wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1591 0);
1592 return;
1593 }
1594
1595 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1596 "with matching credentials found");
1597 }
1598
1599 if (selected)
1600 interworking_connect(wpa_s, selected);
1601 }
1602
1603
1604 static struct wpa_bss_anqp *
1605 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1606 {
1607 struct wpa_bss *other;
1608
1609 if (is_zero_ether_addr(bss->hessid))
1610 return NULL; /* Cannot be in the same homegenous ESS */
1611
1612 dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
1613 if (other == bss)
1614 continue;
1615 if (other->anqp == NULL)
1616 continue;
1617 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
1618 continue;
1619 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
1620 continue;
1621 if (bss->ssid_len != other->ssid_len ||
1622 os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
1623 continue;
1624
1625 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
1626 "already fetched BSSID " MACSTR " and " MACSTR,
1627 MAC2STR(other->bssid), MAC2STR(bss->bssid));
1628 other->anqp->users++;
1629 return other->anqp;
1630 }
1631
1632 return NULL;
1633 }
1634
1635
1636 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1637 {
1638 struct wpa_bss *bss;
1639 int found = 0;
1640 const u8 *ie;
1641
1642 if (!wpa_s->fetch_anqp_in_progress)
1643 return;
1644
1645 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1646 if (!(bss->caps & IEEE80211_CAP_ESS))
1647 continue;
1648 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1649 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1650 continue; /* AP does not support Interworking */
1651
1652 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1653 if (bss->anqp == NULL) {
1654 bss->anqp = interworking_match_anqp_info(wpa_s,
1655 bss);
1656 if (bss->anqp) {
1657 /* Shared data already fetched */
1658 continue;
1659 }
1660 bss->anqp = wpa_bss_anqp_alloc();
1661 if (bss->anqp == NULL)
1662 break;
1663 }
1664 found++;
1665 bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1666 wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1667 MACSTR, MAC2STR(bss->bssid));
1668 interworking_anqp_send_req(wpa_s, bss);
1669 break;
1670 }
1671 }
1672
1673 if (found == 0) {
1674 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1675 wpa_s->fetch_anqp_in_progress = 0;
1676 if (wpa_s->network_select)
1677 interworking_select_network(wpa_s);
1678 }
1679 }
1680
1681
1682 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1683 {
1684 struct wpa_bss *bss;
1685
1686 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1687 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1688
1689 wpa_s->fetch_anqp_in_progress = 1;
1690 interworking_next_anqp_fetch(wpa_s);
1691 }
1692
1693
1694 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1695 {
1696 if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1697 return 0;
1698
1699 wpa_s->network_select = 0;
1700 wpa_s->fetch_all_anqp = 1;
1701
1702 interworking_start_fetch_anqp(wpa_s);
1703
1704 return 0;
1705 }
1706
1707
1708 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1709 {
1710 if (!wpa_s->fetch_anqp_in_progress)
1711 return;
1712
1713 wpa_s->fetch_anqp_in_progress = 0;
1714 }
1715
1716
1717 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1718 u16 info_ids[], size_t num_ids)
1719 {
1720 struct wpabuf *buf;
1721 int ret = 0;
1722 int freq;
1723 struct wpa_bss *bss;
1724 int res;
1725
1726 freq = wpa_s->assoc_freq;
1727 bss = wpa_bss_get_bssid(wpa_s, dst);
1728 if (bss) {
1729 wpa_bss_anqp_unshare_alloc(bss);
1730 freq = bss->freq;
1731 }
1732 if (freq <= 0)
1733 return -1;
1734
1735 wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1736 MAC2STR(dst), (unsigned int) num_ids);
1737
1738 buf = anqp_build_req(info_ids, num_ids, NULL);
1739 if (buf == NULL)
1740 return -1;
1741
1742 res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1743 if (res < 0) {
1744 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1745 ret = -1;
1746 } else
1747 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1748 "%u", res);
1749
1750 wpabuf_free(buf);
1751 return ret;
1752 }
1753
1754
1755 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1756 const u8 *sa, u16 info_id,
1757 const u8 *data, size_t slen)
1758 {
1759 const u8 *pos = data;
1760 struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
1761 struct wpa_bss_anqp *anqp = NULL;
1762 #ifdef CONFIG_HS20
1763 u8 type;
1764 #endif /* CONFIG_HS20 */
1765
1766 if (bss)
1767 anqp = bss->anqp;
1768
1769 switch (info_id) {
1770 case ANQP_CAPABILITY_LIST:
1771 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1772 " ANQP Capability list", MAC2STR(sa));
1773 break;
1774 case ANQP_VENUE_NAME:
1775 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1776 " Venue Name", MAC2STR(sa));
1777 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1778 if (anqp) {
1779 wpabuf_free(anqp->venue_name);
1780 anqp->venue_name = wpabuf_alloc_copy(pos, slen);
1781 }
1782 break;
1783 case ANQP_NETWORK_AUTH_TYPE:
1784 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1785 " Network Authentication Type information",
1786 MAC2STR(sa));
1787 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1788 "Type", pos, slen);
1789 if (anqp) {
1790 wpabuf_free(anqp->network_auth_type);
1791 anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
1792 }
1793 break;
1794 case ANQP_ROAMING_CONSORTIUM:
1795 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1796 " Roaming Consortium list", MAC2STR(sa));
1797 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1798 pos, slen);
1799 if (anqp) {
1800 wpabuf_free(anqp->roaming_consortium);
1801 anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
1802 }
1803 break;
1804 case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1805 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1806 " IP Address Type Availability information",
1807 MAC2STR(sa));
1808 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1809 pos, slen);
1810 if (anqp) {
1811 wpabuf_free(anqp->ip_addr_type_availability);
1812 anqp->ip_addr_type_availability =
1813 wpabuf_alloc_copy(pos, slen);
1814 }
1815 break;
1816 case ANQP_NAI_REALM:
1817 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1818 " NAI Realm list", MAC2STR(sa));
1819 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1820 if (anqp) {
1821 wpabuf_free(anqp->nai_realm);
1822 anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
1823 }
1824 break;
1825 case ANQP_3GPP_CELLULAR_NETWORK:
1826 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1827 " 3GPP Cellular Network information", MAC2STR(sa));
1828 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1829 pos, slen);
1830 if (anqp) {
1831 wpabuf_free(anqp->anqp_3gpp);
1832 anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1833 }
1834 break;
1835 case ANQP_DOMAIN_NAME:
1836 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1837 " Domain Name list", MAC2STR(sa));
1838 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1839 if (anqp) {
1840 wpabuf_free(anqp->domain_name);
1841 anqp->domain_name = wpabuf_alloc_copy(pos, slen);
1842 }
1843 break;
1844 case ANQP_VENDOR_SPECIFIC:
1845 if (slen < 3)
1846 return;
1847
1848 switch (WPA_GET_BE24(pos)) {
1849 #ifdef CONFIG_HS20
1850 case OUI_WFA:
1851 pos += 3;
1852 slen -= 3;
1853
1854 if (slen < 1)
1855 return;
1856 type = *pos++;
1857 slen--;
1858
1859 switch (type) {
1860 case HS20_ANQP_OUI_TYPE:
1861 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
1862 slen);
1863 break;
1864 default:
1865 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
1866 "vendor type %u", type);
1867 break;
1868 }
1869 break;
1870 #endif /* CONFIG_HS20 */
1871 default:
1872 wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1873 "vendor-specific ANQP OUI %06x",
1874 WPA_GET_BE24(pos));
1875 return;
1876 }
1877 break;
1878 default:
1879 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1880 "%u", info_id);
1881 break;
1882 }
1883 }
1884
1885
1886 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1887 enum gas_query_result result,
1888 const struct wpabuf *adv_proto,
1889 const struct wpabuf *resp, u16 status_code)
1890 {
1891 struct wpa_supplicant *wpa_s = ctx;
1892 const u8 *pos;
1893 const u8 *end;
1894 u16 info_id;
1895 u16 slen;
1896
1897 if (result != GAS_QUERY_SUCCESS)
1898 return;
1899
1900 pos = wpabuf_head(adv_proto);
1901 if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
1902 pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
1903 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
1904 "Protocol in response");
1905 return;
1906 }
1907
1908 pos = wpabuf_head(resp);
1909 end = pos + wpabuf_len(resp);
1910
1911 while (pos < end) {
1912 if (pos + 4 > end) {
1913 wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
1914 break;
1915 }
1916 info_id = WPA_GET_LE16(pos);
1917 pos += 2;
1918 slen = WPA_GET_LE16(pos);
1919 pos += 2;
1920 if (pos + slen > end) {
1921 wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
1922 "for Info ID %u", info_id);
1923 break;
1924 }
1925 interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
1926 slen);
1927 pos += slen;
1928 }
1929 }
1930
1931
1932 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
1933 struct wpa_scan_results *scan_res)
1934 {
1935 wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
1936 "ANQP fetch");
1937 interworking_start_fetch_anqp(wpa_s);
1938 }
1939
1940
1941 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
1942 {
1943 interworking_stop_fetch_anqp(wpa_s);
1944 wpa_s->network_select = 1;
1945 wpa_s->auto_network_select = 0;
1946 wpa_s->auto_select = !!auto_select;
1947 wpa_s->fetch_all_anqp = 0;
1948 wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
1949 "selection");
1950 wpa_s->scan_res_handler = interworking_scan_res_handler;
1951 wpa_s->scan_req = 2;
1952 wpa_supplicant_req_scan(wpa_s, 0, 0);
1953
1954 return 0;
1955 }
1956
1957
1958 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
1959 enum gas_query_result result,
1960 const struct wpabuf *adv_proto,
1961 const struct wpabuf *resp, u16 status_code)
1962 {
1963 struct wpa_supplicant *wpa_s = ctx;
1964
1965 wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
1966 " dialog_token=%d status_code=%d resp_len=%d",
1967 MAC2STR(addr), dialog_token, status_code,
1968 resp ? (int) wpabuf_len(resp) : -1);
1969 if (!resp)
1970 return;
1971
1972 wpabuf_free(wpa_s->last_gas_resp);
1973 wpa_s->last_gas_resp = wpabuf_dup(resp);
1974 if (wpa_s->last_gas_resp == NULL)
1975 return;
1976 os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
1977 wpa_s->last_gas_dialog_token = dialog_token;
1978 }
1979
1980
1981 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
1982 const struct wpabuf *adv_proto,
1983 const struct wpabuf *query)
1984 {
1985 struct wpabuf *buf;
1986 int ret = 0;
1987 int freq;
1988 struct wpa_bss *bss;
1989 int res;
1990 size_t len;
1991 u8 query_resp_len_limit = 0, pame_bi = 0;
1992
1993 freq = wpa_s->assoc_freq;
1994 bss = wpa_bss_get_bssid(wpa_s, dst);
1995 if (bss)
1996 freq = bss->freq;
1997 if (freq <= 0)
1998 return -1;
1999
2000 wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2001 MAC2STR(dst), freq);
2002 wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2003 wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2004
2005 len = 3 + wpabuf_len(adv_proto) + 2;
2006 if (query)
2007 len += wpabuf_len(query);
2008 buf = gas_build_initial_req(0, len);
2009 if (buf == NULL)
2010 return -1;
2011
2012 /* Advertisement Protocol IE */
2013 wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2014 wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2015 wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2016 (pame_bi ? 0x80 : 0));
2017 wpabuf_put_buf(buf, adv_proto);
2018
2019 /* GAS Query */
2020 if (query) {
2021 wpabuf_put_le16(buf, wpabuf_len(query));
2022 wpabuf_put_buf(buf, query);
2023 } else
2024 wpabuf_put_le16(buf, 0);
2025
2026 res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2027 if (res < 0) {
2028 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2029 ret = -1;
2030 } else
2031 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2032 "%u", res);
2033
2034 wpabuf_free(buf);
2035 return ret;
2036 }
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