1 /*
2 * RADIUS authentication server
3 * Copyright (c) 2005-2009, 2011, Jouni Malinen <j@w1.fi>
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 #include <net/if.h>
11
12 #include "common.h"
13 #include "radius.h"
14 #include "eloop.h"
15 #include "eap_server/eap.h"
16 #include "radius_server.h"
17
18 /**
19 * RADIUS_SESSION_TIMEOUT - Session timeout in seconds
20 */
21 #define RADIUS_SESSION_TIMEOUT 60
22
23 /**
24 * RADIUS_MAX_SESSION - Maximum number of active sessions
25 */
26 #define RADIUS_MAX_SESSION 100
27
28 /**
29 * RADIUS_MAX_MSG_LEN - Maximum message length for incoming RADIUS messages
30 */
31 #define RADIUS_MAX_MSG_LEN 3000
32
33 static struct eapol_callbacks radius_server_eapol_cb;
34
35 struct radius_client;
36 struct radius_server_data;
37
38 /**
39 * struct radius_server_counters - RADIUS server statistics counters
40 */
41 struct radius_server_counters {
42 u32 access_requests;
43 u32 invalid_requests;
44 u32 dup_access_requests;
45 u32 access_accepts;
46 u32 access_rejects;
47 u32 access_challenges;
48 u32 malformed_access_requests;
49 u32 bad_authenticators;
50 u32 packets_dropped;
51 u32 unknown_types;
52 };
53
54 /**
55 * struct radius_session - Internal RADIUS server data for a session
56 */
57 struct radius_session {
58 struct radius_session *next;
59 struct radius_client *client;
60 struct radius_server_data *server;
61 unsigned int sess_id;
62 struct eap_sm *eap;
63 struct eap_eapol_interface *eap_if;
64
65 struct radius_msg *last_msg;
66 char *last_from_addr;
67 int last_from_port;
68 struct sockaddr_storage last_from;
69 socklen_t last_fromlen;
70 u8 last_identifier;
71 struct radius_msg *last_reply;
72 u8 last_authenticator[16];
73 };
74
75 /**
76 * struct radius_client - Internal RADIUS server data for a client
77 */
78 struct radius_client {
79 struct radius_client *next;
80 struct in_addr addr;
81 struct in_addr mask;
82 #ifdef CONFIG_IPV6
83 struct in6_addr addr6;
84 struct in6_addr mask6;
85 #endif /* CONFIG_IPV6 */
86 char *shared_secret;
87 int shared_secret_len;
88 struct radius_session *sessions;
89 struct radius_server_counters counters;
90 };
91
92 /**
93 * struct radius_server_data - Internal RADIUS server data
94 */
95 struct radius_server_data {
96 /**
97 * auth_sock - Socket for RADIUS authentication messages
98 */
99 int auth_sock;
100
101 /**
102 * clients - List of authorized RADIUS clients
103 */
104 struct radius_client *clients;
105
106 /**
107 * next_sess_id - Next session identifier
108 */
109 unsigned int next_sess_id;
110
111 /**
112 * conf_ctx - Context pointer for callbacks
113 *
114 * This is used as the ctx argument in get_eap_user() calls.
115 */
116 void *conf_ctx;
117
118 /**
119 * num_sess - Number of active sessions
120 */
121 int num_sess;
122
123 /**
124 * eap_sim_db_priv - EAP-SIM/AKA database context
125 *
126 * This is passed to the EAP-SIM/AKA server implementation as a
127 * callback context.
128 */
129 void *eap_sim_db_priv;
130
131 /**
132 * ssl_ctx - TLS context
133 *
134 * This is passed to the EAP server implementation as a callback
135 * context for TLS operations.
136 */
137 void *ssl_ctx;
138
139 /**
140 * pac_opaque_encr_key - PAC-Opaque encryption key for EAP-FAST
141 *
142 * This parameter is used to set a key for EAP-FAST to encrypt the
143 * PAC-Opaque data. It can be set to %NULL if EAP-FAST is not used. If
144 * set, must point to a 16-octet key.
145 */
146 u8 *pac_opaque_encr_key;
147
148 /**
149 * eap_fast_a_id - EAP-FAST authority identity (A-ID)
150 *
151 * If EAP-FAST is not used, this can be set to %NULL. In theory, this
152 * is a variable length field, but due to some existing implementations
153 * requiring A-ID to be 16 octets in length, it is recommended to use
154 * that length for the field to provide interoperability with deployed
155 * peer implementations.
156 */
157 u8 *eap_fast_a_id;
158
159 /**
160 * eap_fast_a_id_len - Length of eap_fast_a_id buffer in octets
161 */
162 size_t eap_fast_a_id_len;
163
164 /**
165 * eap_fast_a_id_info - EAP-FAST authority identifier information
166 *
167 * This A-ID-Info contains a user-friendly name for the A-ID. For
168 * example, this could be the enterprise and server names in
169 * human-readable format. This field is encoded as UTF-8. If EAP-FAST
170 * is not used, this can be set to %NULL.
171 */
172 char *eap_fast_a_id_info;
173
174 /**
175 * eap_fast_prov - EAP-FAST provisioning modes
176 *
177 * 0 = provisioning disabled, 1 = only anonymous provisioning allowed,
178 * 2 = only authenticated provisioning allowed, 3 = both provisioning
179 * modes allowed.
180 */
181 int eap_fast_prov;
182
183 /**
184 * pac_key_lifetime - EAP-FAST PAC-Key lifetime in seconds
185 *
186 * This is the hard limit on how long a provisioned PAC-Key can be
187 * used.
188 */
189 int pac_key_lifetime;
190
191 /**
192 * pac_key_refresh_time - EAP-FAST PAC-Key refresh time in seconds
193 *
194 * This is a soft limit on the PAC-Key. The server will automatically
195 * generate a new PAC-Key when this number of seconds (or fewer) of the
196 * lifetime remains.
197 */
198 int pac_key_refresh_time;
199
200 /**
201 * eap_sim_aka_result_ind - EAP-SIM/AKA protected success indication
202 *
203 * This controls whether the protected success/failure indication
204 * (AT_RESULT_IND) is used with EAP-SIM and EAP-AKA.
205 */
206 int eap_sim_aka_result_ind;
207
208 /**
209 * tnc - Trusted Network Connect (TNC)
210 *
211 * This controls whether TNC is enabled and will be required before the
212 * peer is allowed to connect. Note: This is only used with EAP-TTLS
213 * and EAP-FAST. If any other EAP method is enabled, the peer will be
214 * allowed to connect without TNC.
215 */
216 int tnc;
217
218 /**
219 * pwd_group - The D-H group assigned for EAP-pwd
220 *
221 * If EAP-pwd is not used it can be set to zero.
222 */
223 u16 pwd_group;
224
225 /**
226 * server_id - Server identity
227 */
228 const char *server_id;
229
230 /**
231 * wps - Wi-Fi Protected Setup context
232 *
233 * If WPS is used with an external RADIUS server (which is quite
234 * unlikely configuration), this is used to provide a pointer to WPS
235 * context data. Normally, this can be set to %NULL.
236 */
237 struct wps_context *wps;
238
239 /**
240 * ipv6 - Whether to enable IPv6 support in the RADIUS server
241 */
242 int ipv6;
243
244 /**
245 * start_time - Timestamp of server start
246 */
247 struct os_time start_time;
248
249 /**
250 * counters - Statistics counters for server operations
251 *
252 * These counters are the sum over all clients.
253 */
254 struct radius_server_counters counters;
255
256 /**
257 * get_eap_user - Callback for fetching EAP user information
258 * @ctx: Context data from conf_ctx
259 * @identity: User identity
260 * @identity_len: identity buffer length in octets
261 * @phase2: Whether this is for Phase 2 identity
262 * @user: Data structure for filling in the user information
263 * Returns: 0 on success, -1 on failure
264 *
265 * This is used to fetch information from user database. The callback
266 * will fill in information about allowed EAP methods and the user
267 * password. The password field will be an allocated copy of the
268 * password data and RADIUS server will free it after use.
269 */
270 int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len,
271 int phase2, struct eap_user *user);
272
273 /**
274 * eap_req_id_text - Optional data for EAP-Request/Identity
275 *
276 * This can be used to configure an optional, displayable message that
277 * will be sent in EAP-Request/Identity. This string can contain an
278 * ASCII-0 character (nul) to separate network infromation per RFC
279 * 4284. The actual string length is explicit provided in
280 * eap_req_id_text_len since nul character will not be used as a string
281 * terminator.
282 */
283 char *eap_req_id_text;
284
285 /**
286 * eap_req_id_text_len - Length of eap_req_id_text buffer in octets
287 */
288 size_t eap_req_id_text_len;
289
290 /*
291 * msg_ctx - Context data for wpa_msg() calls
292 */
293 void *msg_ctx;
294
295 #ifdef CONFIG_RADIUS_TEST
296 char *dump_msk_file;
297 #endif /* CONFIG_RADIUS_TEST */
298 };
299
300
301 extern int wpa_debug_level;
302
303 #define RADIUS_DEBUG(args...) \
304 wpa_printf(MSG_DEBUG, "RADIUS SRV: " args)
305 #define RADIUS_ERROR(args...) \
306 wpa_printf(MSG_ERROR, "RADIUS SRV: " args)
307 #define RADIUS_DUMP(args...) \
308 wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args)
309 #define RADIUS_DUMP_ASCII(args...) \
310 wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args)
311
312
313 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx);
314 static void radius_server_session_remove_timeout(void *eloop_ctx,
315 void *timeout_ctx);
316
317
318 static struct radius_client *
radius_server_get_client(struct radius_server_data * data,struct in_addr * addr,int ipv6)319 radius_server_get_client(struct radius_server_data *data, struct in_addr *addr,
320 int ipv6)
321 {
322 struct radius_client *client = data->clients;
323
324 while (client) {
325 #ifdef CONFIG_IPV6
326 if (ipv6) {
327 struct in6_addr *addr6;
328 int i;
329
330 addr6 = (struct in6_addr *) addr;
331 for (i = 0; i < 16; i++) {
332 if ((addr6->s6_addr[i] &
333 client->mask6.s6_addr[i]) !=
334 (client->addr6.s6_addr[i] &
335 client->mask6.s6_addr[i])) {
336 i = 17;
337 break;
338 }
339 }
340 if (i == 16) {
341 break;
342 }
343 }
344 #endif /* CONFIG_IPV6 */
345 if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) ==
346 (addr->s_addr & client->mask.s_addr)) {
347 break;
348 }
349
350 client = client->next;
351 }
352
353 return client;
354 }
355
356
357 static struct radius_session *
radius_server_get_session(struct radius_client * client,unsigned int sess_id)358 radius_server_get_session(struct radius_client *client, unsigned int sess_id)
359 {
360 struct radius_session *sess = client->sessions;
361
362 while (sess) {
363 if (sess->sess_id == sess_id) {
364 break;
365 }
366 sess = sess->next;
367 }
368
369 return sess;
370 }
371
372
radius_server_session_free(struct radius_server_data * data,struct radius_session * sess)373 static void radius_server_session_free(struct radius_server_data *data,
374 struct radius_session *sess)
375 {
376 eloop_cancel_timeout(radius_server_session_timeout, data, sess);
377 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
378 eap_server_sm_deinit(sess->eap);
379 radius_msg_free(sess->last_msg);
380 os_free(sess->last_from_addr);
381 radius_msg_free(sess->last_reply);
382 os_free(sess);
383 data->num_sess--;
384 }
385
386
radius_server_session_remove(struct radius_server_data * data,struct radius_session * sess)387 static void radius_server_session_remove(struct radius_server_data *data,
388 struct radius_session *sess)
389 {
390 struct radius_client *client = sess->client;
391 struct radius_session *session, *prev;
392
393 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
394
395 prev = NULL;
396 session = client->sessions;
397 while (session) {
398 if (session == sess) {
399 if (prev == NULL) {
400 client->sessions = sess->next;
401 } else {
402 prev->next = sess->next;
403 }
404 radius_server_session_free(data, sess);
405 break;
406 }
407 prev = session;
408 session = session->next;
409 }
410 }
411
412
radius_server_session_remove_timeout(void * eloop_ctx,void * timeout_ctx)413 static void radius_server_session_remove_timeout(void *eloop_ctx,
414 void *timeout_ctx)
415 {
416 struct radius_server_data *data = eloop_ctx;
417 struct radius_session *sess = timeout_ctx;
418 RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id);
419 radius_server_session_remove(data, sess);
420 }
421
422
radius_server_session_timeout(void * eloop_ctx,void * timeout_ctx)423 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx)
424 {
425 struct radius_server_data *data = eloop_ctx;
426 struct radius_session *sess = timeout_ctx;
427
428 RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id);
429 radius_server_session_remove(data, sess);
430 }
431
432
433 static struct radius_session *
radius_server_new_session(struct radius_server_data * data,struct radius_client * client)434 radius_server_new_session(struct radius_server_data *data,
435 struct radius_client *client)
436 {
437 struct radius_session *sess;
438
439 if (data->num_sess >= RADIUS_MAX_SESSION) {
440 RADIUS_DEBUG("Maximum number of existing session - no room "
441 "for a new session");
442 return NULL;
443 }
444
445 sess = os_zalloc(sizeof(*sess));
446 if (sess == NULL)
447 return NULL;
448
449 sess->server = data;
450 sess->client = client;
451 sess->sess_id = data->next_sess_id++;
452 sess->next = client->sessions;
453 client->sessions = sess;
454 eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0,
455 radius_server_session_timeout, data, sess);
456 data->num_sess++;
457 return sess;
458 }
459
460
461 static struct radius_session *
radius_server_get_new_session(struct radius_server_data * data,struct radius_client * client,struct radius_msg * msg)462 radius_server_get_new_session(struct radius_server_data *data,
463 struct radius_client *client,
464 struct radius_msg *msg)
465 {
466 u8 *user;
467 size_t user_len;
468 int res;
469 struct radius_session *sess;
470 struct eap_config eap_conf;
471
472 RADIUS_DEBUG("Creating a new session");
473
474 user = os_malloc(256);
475 if (user == NULL) {
476 return NULL;
477 }
478 res = radius_msg_get_attr(msg, RADIUS_ATTR_USER_NAME, user, 256);
479 if (res < 0 || res > 256) {
480 RADIUS_DEBUG("Could not get User-Name");
481 os_free(user);
482 return NULL;
483 }
484 user_len = res;
485 RADIUS_DUMP_ASCII("User-Name", user, user_len);
486
487 res = data->get_eap_user(data->conf_ctx, user, user_len, 0, NULL);
488 os_free(user);
489
490 if (res == 0) {
491 RADIUS_DEBUG("Matching user entry found");
492 sess = radius_server_new_session(data, client);
493 if (sess == NULL) {
494 RADIUS_DEBUG("Failed to create a new session");
495 return NULL;
496 }
497 } else {
498 RADIUS_DEBUG("User-Name not found from user database");
499 return NULL;
500 }
501
502 os_memset(&eap_conf, 0, sizeof(eap_conf));
503 eap_conf.ssl_ctx = data->ssl_ctx;
504 eap_conf.msg_ctx = data->msg_ctx;
505 eap_conf.eap_sim_db_priv = data->eap_sim_db_priv;
506 eap_conf.backend_auth = TRUE;
507 eap_conf.eap_server = 1;
508 eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key;
509 eap_conf.eap_fast_a_id = data->eap_fast_a_id;
510 eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len;
511 eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info;
512 eap_conf.eap_fast_prov = data->eap_fast_prov;
513 eap_conf.pac_key_lifetime = data->pac_key_lifetime;
514 eap_conf.pac_key_refresh_time = data->pac_key_refresh_time;
515 eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind;
516 eap_conf.tnc = data->tnc;
517 eap_conf.wps = data->wps;
518 eap_conf.pwd_group = data->pwd_group;
519 eap_conf.server_id = (const u8 *) data->server_id;
520 eap_conf.server_id_len = os_strlen(data->server_id);
521 sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb,
522 &eap_conf);
523 if (sess->eap == NULL) {
524 RADIUS_DEBUG("Failed to initialize EAP state machine for the "
525 "new session");
526 radius_server_session_free(data, sess);
527 return NULL;
528 }
529 sess->eap_if = eap_get_interface(sess->eap);
530 sess->eap_if->eapRestart = TRUE;
531 sess->eap_if->portEnabled = TRUE;
532
533 RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id);
534
535 return sess;
536 }
537
538
539 static struct radius_msg *
radius_server_encapsulate_eap(struct radius_server_data * data,struct radius_client * client,struct radius_session * sess,struct radius_msg * request)540 radius_server_encapsulate_eap(struct radius_server_data *data,
541 struct radius_client *client,
542 struct radius_session *sess,
543 struct radius_msg *request)
544 {
545 struct radius_msg *msg;
546 int code;
547 unsigned int sess_id;
548 struct radius_hdr *hdr = radius_msg_get_hdr(request);
549
550 if (sess->eap_if->eapFail) {
551 sess->eap_if->eapFail = FALSE;
552 code = RADIUS_CODE_ACCESS_REJECT;
553 } else if (sess->eap_if->eapSuccess) {
554 sess->eap_if->eapSuccess = FALSE;
555 code = RADIUS_CODE_ACCESS_ACCEPT;
556 } else {
557 sess->eap_if->eapReq = FALSE;
558 code = RADIUS_CODE_ACCESS_CHALLENGE;
559 }
560
561 msg = radius_msg_new(code, hdr->identifier);
562 if (msg == NULL) {
563 RADIUS_DEBUG("Failed to allocate reply message");
564 return NULL;
565 }
566
567 sess_id = htonl(sess->sess_id);
568 if (code == RADIUS_CODE_ACCESS_CHALLENGE &&
569 !radius_msg_add_attr(msg, RADIUS_ATTR_STATE,
570 (u8 *) &sess_id, sizeof(sess_id))) {
571 RADIUS_DEBUG("Failed to add State attribute");
572 }
573
574 if (sess->eap_if->eapReqData &&
575 !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData),
576 wpabuf_len(sess->eap_if->eapReqData))) {
577 RADIUS_DEBUG("Failed to add EAP-Message attribute");
578 }
579
580 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) {
581 int len;
582 #ifdef CONFIG_RADIUS_TEST
583 if (data->dump_msk_file) {
584 FILE *f;
585 char buf[2 * 64 + 1];
586 f = fopen(data->dump_msk_file, "a");
587 if (f) {
588 len = sess->eap_if->eapKeyDataLen;
589 if (len > 64)
590 len = 64;
591 len = wpa_snprintf_hex(
592 buf, sizeof(buf),
593 sess->eap_if->eapKeyData, len);
594 buf[len] = '\0';
595 fprintf(f, "%s\n", buf);
596 fclose(f);
597 }
598 }
599 #endif /* CONFIG_RADIUS_TEST */
600 if (sess->eap_if->eapKeyDataLen > 64) {
601 len = 32;
602 } else {
603 len = sess->eap_if->eapKeyDataLen / 2;
604 }
605 if (!radius_msg_add_mppe_keys(msg, hdr->authenticator,
606 (u8 *) client->shared_secret,
607 client->shared_secret_len,
608 sess->eap_if->eapKeyData + len,
609 len, sess->eap_if->eapKeyData,
610 len)) {
611 RADIUS_DEBUG("Failed to add MPPE key attributes");
612 }
613 }
614
615 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
616 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
617 radius_msg_free(msg);
618 return NULL;
619 }
620
621 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
622 client->shared_secret_len,
623 hdr->authenticator) < 0) {
624 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
625 }
626
627 return msg;
628 }
629
630
radius_server_reject(struct radius_server_data * data,struct radius_client * client,struct radius_msg * request,struct sockaddr * from,socklen_t fromlen,const char * from_addr,int from_port)631 static int radius_server_reject(struct radius_server_data *data,
632 struct radius_client *client,
633 struct radius_msg *request,
634 struct sockaddr *from, socklen_t fromlen,
635 const char *from_addr, int from_port)
636 {
637 struct radius_msg *msg;
638 int ret = 0;
639 struct eap_hdr eapfail;
640 struct wpabuf *buf;
641 struct radius_hdr *hdr = radius_msg_get_hdr(request);
642
643 RADIUS_DEBUG("Reject invalid request from %s:%d",
644 from_addr, from_port);
645
646 msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, hdr->identifier);
647 if (msg == NULL) {
648 return -1;
649 }
650
651 os_memset(&eapfail, 0, sizeof(eapfail));
652 eapfail.code = EAP_CODE_FAILURE;
653 eapfail.identifier = 0;
654 eapfail.length = host_to_be16(sizeof(eapfail));
655
656 if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) {
657 RADIUS_DEBUG("Failed to add EAP-Message attribute");
658 }
659
660 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
661 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
662 radius_msg_free(msg);
663 return -1;
664 }
665
666 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
667 client->shared_secret_len,
668 hdr->authenticator) <
669 0) {
670 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
671 }
672
673 if (wpa_debug_level <= MSG_MSGDUMP) {
674 radius_msg_dump(msg);
675 }
676
677 data->counters.access_rejects++;
678 client->counters.access_rejects++;
679 buf = radius_msg_get_buf(msg);
680 if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0,
681 (struct sockaddr *) from, sizeof(*from)) < 0) {
682 perror("sendto[RADIUS SRV]");
683 ret = -1;
684 }
685
686 radius_msg_free(msg);
687
688 return ret;
689 }
690
691
radius_server_request(struct radius_server_data * data,struct radius_msg * msg,struct sockaddr * from,socklen_t fromlen,struct radius_client * client,const char * from_addr,int from_port,struct radius_session * force_sess)692 static int radius_server_request(struct radius_server_data *data,
693 struct radius_msg *msg,
694 struct sockaddr *from, socklen_t fromlen,
695 struct radius_client *client,
696 const char *from_addr, int from_port,
697 struct radius_session *force_sess)
698 {
699 struct wpabuf *eap = NULL;
700 int res, state_included = 0;
701 u8 statebuf[4];
702 unsigned int state;
703 struct radius_session *sess;
704 struct radius_msg *reply;
705 int is_complete = 0;
706
707 if (force_sess)
708 sess = force_sess;
709 else {
710 res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
711 sizeof(statebuf));
712 state_included = res >= 0;
713 if (res == sizeof(statebuf)) {
714 state = WPA_GET_BE32(statebuf);
715 sess = radius_server_get_session(client, state);
716 } else {
717 sess = NULL;
718 }
719 }
720
721 if (sess) {
722 RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
723 } else if (state_included) {
724 RADIUS_DEBUG("State attribute included but no session found");
725 radius_server_reject(data, client, msg, from, fromlen,
726 from_addr, from_port);
727 return -1;
728 } else {
729 sess = radius_server_get_new_session(data, client, msg);
730 if (sess == NULL) {
731 RADIUS_DEBUG("Could not create a new session");
732 radius_server_reject(data, client, msg, from, fromlen,
733 from_addr, from_port);
734 return -1;
735 }
736 }
737
738 if (sess->last_from_port == from_port &&
739 sess->last_identifier == radius_msg_get_hdr(msg)->identifier &&
740 os_memcmp(sess->last_authenticator,
741 radius_msg_get_hdr(msg)->authenticator, 16) == 0) {
742 RADIUS_DEBUG("Duplicate message from %s", from_addr);
743 data->counters.dup_access_requests++;
744 client->counters.dup_access_requests++;
745
746 if (sess->last_reply) {
747 struct wpabuf *buf;
748 buf = radius_msg_get_buf(sess->last_reply);
749 res = sendto(data->auth_sock, wpabuf_head(buf),
750 wpabuf_len(buf), 0,
751 (struct sockaddr *) from, fromlen);
752 if (res < 0) {
753 perror("sendto[RADIUS SRV]");
754 }
755 return 0;
756 }
757
758 RADIUS_DEBUG("No previous reply available for duplicate "
759 "message");
760 return -1;
761 }
762
763 eap = radius_msg_get_eap(msg);
764 if (eap == NULL) {
765 RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
766 from_addr);
767 data->counters.packets_dropped++;
768 client->counters.packets_dropped++;
769 return -1;
770 }
771
772 RADIUS_DUMP("Received EAP data", wpabuf_head(eap), wpabuf_len(eap));
773
774 /* FIX: if Code is Request, Success, or Failure, send Access-Reject;
775 * RFC3579 Sect. 2.6.2.
776 * Include EAP-Response/Nak with no preferred method if
777 * code == request.
778 * If code is not 1-4, discard the packet silently.
779 * Or is this already done by the EAP state machine? */
780
781 wpabuf_free(sess->eap_if->eapRespData);
782 sess->eap_if->eapRespData = eap;
783 sess->eap_if->eapResp = TRUE;
784 eap_server_sm_step(sess->eap);
785
786 if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
787 sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
788 RADIUS_DUMP("EAP data from the state machine",
789 wpabuf_head(sess->eap_if->eapReqData),
790 wpabuf_len(sess->eap_if->eapReqData));
791 } else if (sess->eap_if->eapFail) {
792 RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
793 "set");
794 } else if (eap_sm_method_pending(sess->eap)) {
795 radius_msg_free(sess->last_msg);
796 sess->last_msg = msg;
797 sess->last_from_port = from_port;
798 os_free(sess->last_from_addr);
799 sess->last_from_addr = os_strdup(from_addr);
800 sess->last_fromlen = fromlen;
801 os_memcpy(&sess->last_from, from, fromlen);
802 return -2;
803 } else {
804 RADIUS_DEBUG("No EAP data from the state machine - ignore this"
805 " Access-Request silently (assuming it was a "
806 "duplicate)");
807 data->counters.packets_dropped++;
808 client->counters.packets_dropped++;
809 return -1;
810 }
811
812 if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
813 is_complete = 1;
814
815 reply = radius_server_encapsulate_eap(data, client, sess, msg);
816
817 if (reply) {
818 struct wpabuf *buf;
819 struct radius_hdr *hdr;
820
821 RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port);
822 if (wpa_debug_level <= MSG_MSGDUMP) {
823 radius_msg_dump(reply);
824 }
825
826 switch (radius_msg_get_hdr(reply)->code) {
827 case RADIUS_CODE_ACCESS_ACCEPT:
828 data->counters.access_accepts++;
829 client->counters.access_accepts++;
830 break;
831 case RADIUS_CODE_ACCESS_REJECT:
832 data->counters.access_rejects++;
833 client->counters.access_rejects++;
834 break;
835 case RADIUS_CODE_ACCESS_CHALLENGE:
836 data->counters.access_challenges++;
837 client->counters.access_challenges++;
838 break;
839 }
840 buf = radius_msg_get_buf(reply);
841 res = sendto(data->auth_sock, wpabuf_head(buf),
842 wpabuf_len(buf), 0,
843 (struct sockaddr *) from, fromlen);
844 if (res < 0) {
845 perror("sendto[RADIUS SRV]");
846 }
847 radius_msg_free(sess->last_reply);
848 sess->last_reply = reply;
849 sess->last_from_port = from_port;
850 hdr = radius_msg_get_hdr(msg);
851 sess->last_identifier = hdr->identifier;
852 os_memcpy(sess->last_authenticator, hdr->authenticator, 16);
853 } else {
854 data->counters.packets_dropped++;
855 client->counters.packets_dropped++;
856 }
857
858 if (is_complete) {
859 RADIUS_DEBUG("Removing completed session 0x%x after timeout",
860 sess->sess_id);
861 eloop_cancel_timeout(radius_server_session_remove_timeout,
862 data, sess);
863 eloop_register_timeout(10, 0,
864 radius_server_session_remove_timeout,
865 data, sess);
866 }
867
868 return 0;
869 }
870
871
radius_server_receive_auth(int sock,void * eloop_ctx,void * sock_ctx)872 static void radius_server_receive_auth(int sock, void *eloop_ctx,
873 void *sock_ctx)
874 {
875 struct radius_server_data *data = eloop_ctx;
876 u8 *buf = NULL;
877 union {
878 struct sockaddr_storage ss;
879 struct sockaddr_in sin;
880 #ifdef CONFIG_IPV6
881 struct sockaddr_in6 sin6;
882 #endif /* CONFIG_IPV6 */
883 } from;
884 socklen_t fromlen;
885 int len;
886 struct radius_client *client = NULL;
887 struct radius_msg *msg = NULL;
888 char abuf[50];
889 int from_port = 0;
890
891 buf = os_malloc(RADIUS_MAX_MSG_LEN);
892 if (buf == NULL) {
893 goto fail;
894 }
895
896 fromlen = sizeof(from);
897 len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
898 (struct sockaddr *) &from.ss, &fromlen);
899 if (len < 0) {
900 perror("recvfrom[radius_server]");
901 goto fail;
902 }
903
904 #ifdef CONFIG_IPV6
905 if (data->ipv6) {
906 if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
907 sizeof(abuf)) == NULL)
908 abuf[0] = '\0';
909 from_port = ntohs(from.sin6.sin6_port);
910 RADIUS_DEBUG("Received %d bytes from %s:%d",
911 len, abuf, from_port);
912
913 client = radius_server_get_client(data,
914 (struct in_addr *)
915 &from.sin6.sin6_addr, 1);
916 }
917 #endif /* CONFIG_IPV6 */
918
919 if (!data->ipv6) {
920 os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
921 from_port = ntohs(from.sin.sin_port);
922 RADIUS_DEBUG("Received %d bytes from %s:%d",
923 len, abuf, from_port);
924
925 client = radius_server_get_client(data, &from.sin.sin_addr, 0);
926 }
927
928 RADIUS_DUMP("Received data", buf, len);
929
930 if (client == NULL) {
931 RADIUS_DEBUG("Unknown client %s - packet ignored", abuf);
932 data->counters.invalid_requests++;
933 goto fail;
934 }
935
936 msg = radius_msg_parse(buf, len);
937 if (msg == NULL) {
938 RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
939 data->counters.malformed_access_requests++;
940 client->counters.malformed_access_requests++;
941 goto fail;
942 }
943
944 os_free(buf);
945 buf = NULL;
946
947 if (wpa_debug_level <= MSG_MSGDUMP) {
948 radius_msg_dump(msg);
949 }
950
951 if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCESS_REQUEST) {
952 RADIUS_DEBUG("Unexpected RADIUS code %d",
953 radius_msg_get_hdr(msg)->code);
954 data->counters.unknown_types++;
955 client->counters.unknown_types++;
956 goto fail;
957 }
958
959 data->counters.access_requests++;
960 client->counters.access_requests++;
961
962 if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret,
963 client->shared_secret_len, NULL)) {
964 RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf);
965 data->counters.bad_authenticators++;
966 client->counters.bad_authenticators++;
967 goto fail;
968 }
969
970 if (radius_server_request(data, msg, (struct sockaddr *) &from,
971 fromlen, client, abuf, from_port, NULL) ==
972 -2)
973 return; /* msg was stored with the session */
974
975 fail:
976 radius_msg_free(msg);
977 os_free(buf);
978 }
979
980
radius_server_disable_pmtu_discovery(int s)981 static int radius_server_disable_pmtu_discovery(int s)
982 {
983 int r = -1;
984 #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
985 /* Turn off Path MTU discovery on IPv4/UDP sockets. */
986 int action = IP_PMTUDISC_DONT;
987 r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
988 sizeof(action));
989 if (r == -1)
990 wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: "
991 "%s", strerror(errno));
992 #endif
993 return r;
994 }
995
996
radius_server_open_socket(int port)997 static int radius_server_open_socket(int port)
998 {
999 int s;
1000 struct sockaddr_in addr;
1001
1002 s = socket(PF_INET, SOCK_DGRAM, 0);
1003 if (s < 0) {
1004 perror("socket");
1005 return -1;
1006 }
1007
1008 radius_server_disable_pmtu_discovery(s);
1009
1010 os_memset(&addr, 0, sizeof(addr));
1011 addr.sin_family = AF_INET;
1012 addr.sin_port = htons(port);
1013 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1014 perror("bind");
1015 close(s);
1016 return -1;
1017 }
1018
1019 return s;
1020 }
1021
1022
1023 #ifdef CONFIG_IPV6
radius_server_open_socket6(int port)1024 static int radius_server_open_socket6(int port)
1025 {
1026 int s;
1027 struct sockaddr_in6 addr;
1028
1029 s = socket(PF_INET6, SOCK_DGRAM, 0);
1030 if (s < 0) {
1031 perror("socket[IPv6]");
1032 return -1;
1033 }
1034
1035 os_memset(&addr, 0, sizeof(addr));
1036 addr.sin6_family = AF_INET6;
1037 os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any));
1038 addr.sin6_port = htons(port);
1039 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1040 perror("bind");
1041 close(s);
1042 return -1;
1043 }
1044
1045 return s;
1046 }
1047 #endif /* CONFIG_IPV6 */
1048
1049
radius_server_free_sessions(struct radius_server_data * data,struct radius_session * sessions)1050 static void radius_server_free_sessions(struct radius_server_data *data,
1051 struct radius_session *sessions)
1052 {
1053 struct radius_session *session, *prev;
1054
1055 session = sessions;
1056 while (session) {
1057 prev = session;
1058 session = session->next;
1059 radius_server_session_free(data, prev);
1060 }
1061 }
1062
1063
radius_server_free_clients(struct radius_server_data * data,struct radius_client * clients)1064 static void radius_server_free_clients(struct radius_server_data *data,
1065 struct radius_client *clients)
1066 {
1067 struct radius_client *client, *prev;
1068
1069 client = clients;
1070 while (client) {
1071 prev = client;
1072 client = client->next;
1073
1074 radius_server_free_sessions(data, prev->sessions);
1075 os_free(prev->shared_secret);
1076 os_free(prev);
1077 }
1078 }
1079
1080
1081 static struct radius_client *
radius_server_read_clients(const char * client_file,int ipv6)1082 radius_server_read_clients(const char *client_file, int ipv6)
1083 {
1084 FILE *f;
1085 const int buf_size = 1024;
1086 char *buf, *pos;
1087 struct radius_client *clients, *tail, *entry;
1088 int line = 0, mask, failed = 0, i;
1089 struct in_addr addr;
1090 #ifdef CONFIG_IPV6
1091 struct in6_addr addr6;
1092 #endif /* CONFIG_IPV6 */
1093 unsigned int val;
1094
1095 f = fopen(client_file, "r");
1096 if (f == NULL) {
1097 RADIUS_ERROR("Could not open client file '%s'", client_file);
1098 return NULL;
1099 }
1100
1101 buf = os_malloc(buf_size);
1102 if (buf == NULL) {
1103 fclose(f);
1104 return NULL;
1105 }
1106
1107 clients = tail = NULL;
1108 while (fgets(buf, buf_size, f)) {
1109 /* Configuration file format:
1110 * 192.168.1.0/24 secret
1111 * 192.168.1.2 secret
1112 * fe80::211:22ff:fe33:4455/64 secretipv6
1113 */
1114 line++;
1115 buf[buf_size - 1] = '\0';
1116 pos = buf;
1117 while (*pos != '\0' && *pos != '\n')
1118 pos++;
1119 if (*pos == '\n')
1120 *pos = '\0';
1121 if (*buf == '\0' || *buf == '#')
1122 continue;
1123
1124 pos = buf;
1125 while ((*pos >= '0' && *pos <= '9') || *pos == '.' ||
1126 (*pos >= 'a' && *pos <= 'f') || *pos == ':' ||
1127 (*pos >= 'A' && *pos <= 'F')) {
1128 pos++;
1129 }
1130
1131 if (*pos == '\0') {
1132 failed = 1;
1133 break;
1134 }
1135
1136 if (*pos == '/') {
1137 char *end;
1138 *pos++ = '\0';
1139 mask = strtol(pos, &end, 10);
1140 if ((pos == end) ||
1141 (mask < 0 || mask > (ipv6 ? 128 : 32))) {
1142 failed = 1;
1143 break;
1144 }
1145 pos = end;
1146 } else {
1147 mask = ipv6 ? 128 : 32;
1148 *pos++ = '\0';
1149 }
1150
1151 if (!ipv6 && inet_aton(buf, &addr) == 0) {
1152 failed = 1;
1153 break;
1154 }
1155 #ifdef CONFIG_IPV6
1156 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) {
1157 if (inet_pton(AF_INET, buf, &addr) <= 0) {
1158 failed = 1;
1159 break;
1160 }
1161 /* Convert IPv4 address to IPv6 */
1162 if (mask <= 32)
1163 mask += (128 - 32);
1164 os_memset(addr6.s6_addr, 0, 10);
1165 addr6.s6_addr[10] = 0xff;
1166 addr6.s6_addr[11] = 0xff;
1167 os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr,
1168 4);
1169 }
1170 #endif /* CONFIG_IPV6 */
1171
1172 while (*pos == ' ' || *pos == '\t') {
1173 pos++;
1174 }
1175
1176 if (*pos == '\0') {
1177 failed = 1;
1178 break;
1179 }
1180
1181 entry = os_zalloc(sizeof(*entry));
1182 if (entry == NULL) {
1183 failed = 1;
1184 break;
1185 }
1186 entry->shared_secret = os_strdup(pos);
1187 if (entry->shared_secret == NULL) {
1188 failed = 1;
1189 os_free(entry);
1190 break;
1191 }
1192 entry->shared_secret_len = os_strlen(entry->shared_secret);
1193 entry->addr.s_addr = addr.s_addr;
1194 if (!ipv6) {
1195 val = 0;
1196 for (i = 0; i < mask; i++)
1197 val |= 1 << (31 - i);
1198 entry->mask.s_addr = htonl(val);
1199 }
1200 #ifdef CONFIG_IPV6
1201 if (ipv6) {
1202 int offset = mask / 8;
1203
1204 os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16);
1205 os_memset(entry->mask6.s6_addr, 0xff, offset);
1206 val = 0;
1207 for (i = 0; i < (mask % 8); i++)
1208 val |= 1 << (7 - i);
1209 if (offset < 16)
1210 entry->mask6.s6_addr[offset] = val;
1211 }
1212 #endif /* CONFIG_IPV6 */
1213
1214 if (tail == NULL) {
1215 clients = tail = entry;
1216 } else {
1217 tail->next = entry;
1218 tail = entry;
1219 }
1220 }
1221
1222 if (failed) {
1223 RADIUS_ERROR("Invalid line %d in '%s'", line, client_file);
1224 radius_server_free_clients(NULL, clients);
1225 clients = NULL;
1226 }
1227
1228 os_free(buf);
1229 fclose(f);
1230
1231 return clients;
1232 }
1233
1234
1235 /**
1236 * radius_server_init - Initialize RADIUS server
1237 * @conf: Configuration for the RADIUS server
1238 * Returns: Pointer to private RADIUS server context or %NULL on failure
1239 *
1240 * This initializes a RADIUS server instance and returns a context pointer that
1241 * will be used in other calls to the RADIUS server module. The server can be
1242 * deinitialize by calling radius_server_deinit().
1243 */
1244 struct radius_server_data *
radius_server_init(struct radius_server_conf * conf)1245 radius_server_init(struct radius_server_conf *conf)
1246 {
1247 struct radius_server_data *data;
1248
1249 #ifndef CONFIG_IPV6
1250 if (conf->ipv6) {
1251 fprintf(stderr, "RADIUS server compiled without IPv6 "
1252 "support.\n");
1253 return NULL;
1254 }
1255 #endif /* CONFIG_IPV6 */
1256
1257 data = os_zalloc(sizeof(*data));
1258 if (data == NULL)
1259 return NULL;
1260
1261 os_get_time(&data->start_time);
1262 data->conf_ctx = conf->conf_ctx;
1263 data->eap_sim_db_priv = conf->eap_sim_db_priv;
1264 data->ssl_ctx = conf->ssl_ctx;
1265 data->msg_ctx = conf->msg_ctx;
1266 data->ipv6 = conf->ipv6;
1267 if (conf->pac_opaque_encr_key) {
1268 data->pac_opaque_encr_key = os_malloc(16);
1269 os_memcpy(data->pac_opaque_encr_key, conf->pac_opaque_encr_key,
1270 16);
1271 }
1272 if (conf->eap_fast_a_id) {
1273 data->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len);
1274 if (data->eap_fast_a_id) {
1275 os_memcpy(data->eap_fast_a_id, conf->eap_fast_a_id,
1276 conf->eap_fast_a_id_len);
1277 data->eap_fast_a_id_len = conf->eap_fast_a_id_len;
1278 }
1279 }
1280 if (conf->eap_fast_a_id_info)
1281 data->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info);
1282 data->eap_fast_prov = conf->eap_fast_prov;
1283 data->pac_key_lifetime = conf->pac_key_lifetime;
1284 data->pac_key_refresh_time = conf->pac_key_refresh_time;
1285 data->get_eap_user = conf->get_eap_user;
1286 data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind;
1287 data->tnc = conf->tnc;
1288 data->wps = conf->wps;
1289 data->pwd_group = conf->pwd_group;
1290 data->server_id = conf->server_id;
1291 if (conf->eap_req_id_text) {
1292 data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len);
1293 if (data->eap_req_id_text) {
1294 os_memcpy(data->eap_req_id_text, conf->eap_req_id_text,
1295 conf->eap_req_id_text_len);
1296 data->eap_req_id_text_len = conf->eap_req_id_text_len;
1297 }
1298 }
1299
1300 #ifdef CONFIG_RADIUS_TEST
1301 if (conf->dump_msk_file)
1302 data->dump_msk_file = os_strdup(conf->dump_msk_file);
1303 #endif /* CONFIG_RADIUS_TEST */
1304
1305 data->clients = radius_server_read_clients(conf->client_file,
1306 conf->ipv6);
1307 if (data->clients == NULL) {
1308 printf("No RADIUS clients configured.\n");
1309 radius_server_deinit(data);
1310 return NULL;
1311 }
1312
1313 #ifdef CONFIG_IPV6
1314 if (conf->ipv6)
1315 data->auth_sock = radius_server_open_socket6(conf->auth_port);
1316 else
1317 #endif /* CONFIG_IPV6 */
1318 data->auth_sock = radius_server_open_socket(conf->auth_port);
1319 if (data->auth_sock < 0) {
1320 printf("Failed to open UDP socket for RADIUS authentication "
1321 "server\n");
1322 radius_server_deinit(data);
1323 return NULL;
1324 }
1325 if (eloop_register_read_sock(data->auth_sock,
1326 radius_server_receive_auth,
1327 data, NULL)) {
1328 radius_server_deinit(data);
1329 return NULL;
1330 }
1331
1332 return data;
1333 }
1334
1335
1336 /**
1337 * radius_server_deinit - Deinitialize RADIUS server
1338 * @data: RADIUS server context from radius_server_init()
1339 */
radius_server_deinit(struct radius_server_data * data)1340 void radius_server_deinit(struct radius_server_data *data)
1341 {
1342 if (data == NULL)
1343 return;
1344
1345 if (data->auth_sock >= 0) {
1346 eloop_unregister_read_sock(data->auth_sock);
1347 close(data->auth_sock);
1348 }
1349
1350 radius_server_free_clients(data, data->clients);
1351
1352 os_free(data->pac_opaque_encr_key);
1353 os_free(data->eap_fast_a_id);
1354 os_free(data->eap_fast_a_id_info);
1355 os_free(data->eap_req_id_text);
1356 #ifdef CONFIG_RADIUS_TEST
1357 os_free(data->dump_msk_file);
1358 #endif /* CONFIG_RADIUS_TEST */
1359 os_free(data);
1360 }
1361
1362
1363 /**
1364 * radius_server_get_mib - Get RADIUS server MIB information
1365 * @data: RADIUS server context from radius_server_init()
1366 * @buf: Buffer for returning the MIB data in text format
1367 * @buflen: buf length in octets
1368 * Returns: Number of octets written into buf
1369 */
radius_server_get_mib(struct radius_server_data * data,char * buf,size_t buflen)1370 int radius_server_get_mib(struct radius_server_data *data, char *buf,
1371 size_t buflen)
1372 {
1373 int ret, uptime;
1374 unsigned int idx;
1375 char *end, *pos;
1376 struct os_time now;
1377 struct radius_client *cli;
1378
1379 /* RFC 2619 - RADIUS Authentication Server MIB */
1380
1381 if (data == NULL || buflen == 0)
1382 return 0;
1383
1384 pos = buf;
1385 end = buf + buflen;
1386
1387 os_get_time(&now);
1388 uptime = (now.sec - data->start_time.sec) * 100 +
1389 ((now.usec - data->start_time.usec) / 10000) % 100;
1390 ret = os_snprintf(pos, end - pos,
1391 "RADIUS-AUTH-SERVER-MIB\n"
1392 "radiusAuthServIdent=hostapd\n"
1393 "radiusAuthServUpTime=%d\n"
1394 "radiusAuthServResetTime=0\n"
1395 "radiusAuthServConfigReset=4\n",
1396 uptime);
1397 if (ret < 0 || ret >= end - pos) {
1398 *pos = '\0';
1399 return pos - buf;
1400 }
1401 pos += ret;
1402
1403 ret = os_snprintf(pos, end - pos,
1404 "radiusAuthServTotalAccessRequests=%u\n"
1405 "radiusAuthServTotalInvalidRequests=%u\n"
1406 "radiusAuthServTotalDupAccessRequests=%u\n"
1407 "radiusAuthServTotalAccessAccepts=%u\n"
1408 "radiusAuthServTotalAccessRejects=%u\n"
1409 "radiusAuthServTotalAccessChallenges=%u\n"
1410 "radiusAuthServTotalMalformedAccessRequests=%u\n"
1411 "radiusAuthServTotalBadAuthenticators=%u\n"
1412 "radiusAuthServTotalPacketsDropped=%u\n"
1413 "radiusAuthServTotalUnknownTypes=%u\n",
1414 data->counters.access_requests,
1415 data->counters.invalid_requests,
1416 data->counters.dup_access_requests,
1417 data->counters.access_accepts,
1418 data->counters.access_rejects,
1419 data->counters.access_challenges,
1420 data->counters.malformed_access_requests,
1421 data->counters.bad_authenticators,
1422 data->counters.packets_dropped,
1423 data->counters.unknown_types);
1424 if (ret < 0 || ret >= end - pos) {
1425 *pos = '\0';
1426 return pos - buf;
1427 }
1428 pos += ret;
1429
1430 for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) {
1431 char abuf[50], mbuf[50];
1432 #ifdef CONFIG_IPV6
1433 if (data->ipv6) {
1434 if (inet_ntop(AF_INET6, &cli->addr6, abuf,
1435 sizeof(abuf)) == NULL)
1436 abuf[0] = '\0';
1437 if (inet_ntop(AF_INET6, &cli->mask6, abuf,
1438 sizeof(mbuf)) == NULL)
1439 mbuf[0] = '\0';
1440 }
1441 #endif /* CONFIG_IPV6 */
1442 if (!data->ipv6) {
1443 os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf));
1444 os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf));
1445 }
1446
1447 ret = os_snprintf(pos, end - pos,
1448 "radiusAuthClientIndex=%u\n"
1449 "radiusAuthClientAddress=%s/%s\n"
1450 "radiusAuthServAccessRequests=%u\n"
1451 "radiusAuthServDupAccessRequests=%u\n"
1452 "radiusAuthServAccessAccepts=%u\n"
1453 "radiusAuthServAccessRejects=%u\n"
1454 "radiusAuthServAccessChallenges=%u\n"
1455 "radiusAuthServMalformedAccessRequests=%u\n"
1456 "radiusAuthServBadAuthenticators=%u\n"
1457 "radiusAuthServPacketsDropped=%u\n"
1458 "radiusAuthServUnknownTypes=%u\n",
1459 idx,
1460 abuf, mbuf,
1461 cli->counters.access_requests,
1462 cli->counters.dup_access_requests,
1463 cli->counters.access_accepts,
1464 cli->counters.access_rejects,
1465 cli->counters.access_challenges,
1466 cli->counters.malformed_access_requests,
1467 cli->counters.bad_authenticators,
1468 cli->counters.packets_dropped,
1469 cli->counters.unknown_types);
1470 if (ret < 0 || ret >= end - pos) {
1471 *pos = '\0';
1472 return pos - buf;
1473 }
1474 pos += ret;
1475 }
1476
1477 return pos - buf;
1478 }
1479
1480
radius_server_get_eap_user(void * ctx,const u8 * identity,size_t identity_len,int phase2,struct eap_user * user)1481 static int radius_server_get_eap_user(void *ctx, const u8 *identity,
1482 size_t identity_len, int phase2,
1483 struct eap_user *user)
1484 {
1485 struct radius_session *sess = ctx;
1486 struct radius_server_data *data = sess->server;
1487
1488 return data->get_eap_user(data->conf_ctx, identity, identity_len,
1489 phase2, user);
1490 }
1491
1492
radius_server_get_eap_req_id_text(void * ctx,size_t * len)1493 static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len)
1494 {
1495 struct radius_session *sess = ctx;
1496 struct radius_server_data *data = sess->server;
1497 *len = data->eap_req_id_text_len;
1498 return data->eap_req_id_text;
1499 }
1500
1501
1502 static struct eapol_callbacks radius_server_eapol_cb =
1503 {
1504 .get_eap_user = radius_server_get_eap_user,
1505 .get_eap_req_id_text = radius_server_get_eap_req_id_text,
1506 };
1507
1508
1509 /**
1510 * radius_server_eap_pending_cb - Pending EAP data notification
1511 * @data: RADIUS server context from radius_server_init()
1512 * @ctx: Pending EAP context pointer
1513 *
1514 * This function is used to notify EAP server module that a pending operation
1515 * has been completed and processing of the EAP session can proceed.
1516 */
radius_server_eap_pending_cb(struct radius_server_data * data,void * ctx)1517 void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx)
1518 {
1519 struct radius_client *cli;
1520 struct radius_session *s, *sess = NULL;
1521 struct radius_msg *msg;
1522
1523 if (data == NULL)
1524 return;
1525
1526 for (cli = data->clients; cli; cli = cli->next) {
1527 for (s = cli->sessions; s; s = s->next) {
1528 if (s->eap == ctx && s->last_msg) {
1529 sess = s;
1530 break;
1531 }
1532 if (sess)
1533 break;
1534 }
1535 if (sess)
1536 break;
1537 }
1538
1539 if (sess == NULL) {
1540 RADIUS_DEBUG("No session matched callback ctx");
1541 return;
1542 }
1543
1544 msg = sess->last_msg;
1545 sess->last_msg = NULL;
1546 eap_sm_pending_cb(sess->eap);
1547 if (radius_server_request(data, msg,
1548 (struct sockaddr *) &sess->last_from,
1549 sess->last_fromlen, cli,
1550 sess->last_from_addr,
1551 sess->last_from_port, sess) == -2)
1552 return; /* msg was stored with the session */
1553
1554 radius_msg_free(msg);
1555 }
1556