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