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nl80211: Clear BSS state mismatches with deauth as a workaround
[thirdparty/hostap.git] / src / radius / radius_server.c
CommitLineData
6fc6879b
JM		 1/*
2 * hostapd / RADIUS authentication server
3 * Copyright (c) 2005-2008, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15#include "includes.h"
16#include <net/if.h>
17
18#include "common.h"
19#include "radius.h"
20#include "eloop.h"
6fc6879b
JM		 21#include "eap_server/eap.h"
22#include "radius_server.h"
23
24#define RADIUS_SESSION_TIMEOUT 60
25#define RADIUS_MAX_SESSION 100
26#define RADIUS_MAX_MSG_LEN 3000
27
28static struct eapol_callbacks radius_server_eapol_cb;
29
30struct radius_client;
31struct radius_server_data;
32
33struct radius_server_counters {
34 u32 access_requests;
35 u32 invalid_requests;
36 u32 dup_access_requests;
37 u32 access_accepts;
38 u32 access_rejects;
39 u32 access_challenges;
40 u32 malformed_access_requests;
41 u32 bad_authenticators;
42 u32 packets_dropped;
43 u32 unknown_types;
44};
45
46struct radius_session {
47 struct radius_session *next;
48 struct radius_client *client;
49 struct radius_server_data *server;
50 unsigned int sess_id;
51 struct eap_sm *eap;
52 struct eap_eapol_interface *eap_if;
53
54 struct radius_msg *last_msg;
55 char *last_from_addr;
56 int last_from_port;
57 struct sockaddr_storage last_from;
58 socklen_t last_fromlen;
59 u8 last_identifier;
60 struct radius_msg *last_reply;
61 u8 last_authenticator[16];
62};
63
64struct radius_client {
65 struct radius_client *next;
66 struct in_addr addr;
67 struct in_addr mask;
68#ifdef CONFIG_IPV6
69 struct in6_addr addr6;
70 struct in6_addr mask6;
71#endif /* CONFIG_IPV6 */
72 char *shared_secret;
73 int shared_secret_len;
74 struct radius_session *sessions;
75 struct radius_server_counters counters;
76};
77
78struct radius_server_data {
79 int auth_sock;
80 struct radius_client *clients;
81 unsigned int next_sess_id;
82 void *conf_ctx;
83 int num_sess;
84 void *eap_sim_db_priv;
85 void *ssl_ctx;
86 u8 *pac_opaque_encr_key;
2d867244
JM		 87 u8 *eap_fast_a_id;
88 size_t eap_fast_a_id_len;
89 char *eap_fast_a_id_info;
378eae5e 90 int eap_fast_prov;
a11c90a6
JM		 91 int pac_key_lifetime;
92 int pac_key_refresh_time;
6fc6879b 93 int eap_sim_aka_result_ind;
c3e258ae 94 int tnc;
ad08c363 95 struct wps_context *wps;
6fc6879b
JM		 96 int ipv6;
97 struct os_time start_time;
98 struct radius_server_counters counters;
99 int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len,
100 int phase2, struct eap_user *user);
65d50f0a
JM		 101 char *eap_req_id_text;
102 size_t eap_req_id_text_len;
6fc6879b
JM		 103};
104
105
106extern int wpa_debug_level;
107
108#define RADIUS_DEBUG(args...) \
109wpa_printf(MSG_DEBUG, "RADIUS SRV: " args)
110#define RADIUS_ERROR(args...) \
111wpa_printf(MSG_ERROR, "RADIUS SRV: " args)
112#define RADIUS_DUMP(args...) \
113wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args)
114#define RADIUS_DUMP_ASCII(args...) \
115wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args)
116
117
118static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx);
119
120
121
122static struct radius_client *
123radius_server_get_client(struct radius_server_data *data, struct in_addr *addr,
124 int ipv6)
125{
126 struct radius_client *client = data->clients;
127
128 while (client) {
129#ifdef CONFIG_IPV6
130 if (ipv6) {
131 struct in6_addr *addr6;
132 int i;
133
134 addr6 = (struct in6_addr *) addr;
135 for (i = 0; i < 16; i++) {
136 if ((addr6->s6_addr[i] &
137 client->mask6.s6_addr[i]) !=
138 (client->addr6.s6_addr[i] &
139 client->mask6.s6_addr[i])) {
140 i = 17;
141 break;
142 }
143 }
144 if (i == 16) {
145 break;
146 }
147 }
148#endif /* CONFIG_IPV6 */
149 if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) ==
150 (addr->s_addr & client->mask.s_addr)) {
151 break;
152 }
153
154 client = client->next;
155 }
156
157 return client;
158}
159
160
161static struct radius_session *
162radius_server_get_session(struct radius_client *client, unsigned int sess_id)
163{
164 struct radius_session *sess = client->sessions;
165
166 while (sess) {
167 if (sess->sess_id == sess_id) {
168 break;
169 }
170 sess = sess->next;
171 }
172
173 return sess;
174}
175
176
177static void radius_server_session_free(struct radius_server_data *data,
178 struct radius_session *sess)
179{
180 eloop_cancel_timeout(radius_server_session_timeout, data, sess);
181 eap_server_sm_deinit(sess->eap);
182 if (sess->last_msg) {
183 radius_msg_free(sess->last_msg);
184 os_free(sess->last_msg);
185 }
186 os_free(sess->last_from_addr);
187 if (sess->last_reply) {
188 radius_msg_free(sess->last_reply);
189 os_free(sess->last_reply);
190 }
191 os_free(sess);
192 data->num_sess--;
193}
194
195
196static void radius_server_session_remove_timeout(void *eloop_ctx,
197 void *timeout_ctx);
198
199static void radius_server_session_remove(struct radius_server_data *data,
200 struct radius_session *sess)
201{
202 struct radius_client *client = sess->client;
203 struct radius_session *session, *prev;
204
205 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
206
207 prev = NULL;
208 session = client->sessions;
209 while (session) {
210 if (session == sess) {
211 if (prev == NULL) {
212 client->sessions = sess->next;
213 } else {
214 prev->next = sess->next;
215 }
216 radius_server_session_free(data, sess);
217 break;
218 }
219 prev = session;
220 session = session->next;
221 }
222}
223
224
225static void radius_server_session_remove_timeout(void *eloop_ctx,
226 void *timeout_ctx)
227{
228 struct radius_server_data *data = eloop_ctx;
229 struct radius_session *sess = timeout_ctx;
230 RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id);
231 radius_server_session_remove(data, sess);
232}
233
234
235static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx)
236{
237 struct radius_server_data *data = eloop_ctx;
238 struct radius_session *sess = timeout_ctx;
239
240 RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id);
241 radius_server_session_remove(data, sess);
242}
243
244
245static struct radius_session *
246radius_server_new_session(struct radius_server_data *data,
247 struct radius_client *client)
248{
249 struct radius_session *sess;
250
251 if (data->num_sess >= RADIUS_MAX_SESSION) {
252 RADIUS_DEBUG("Maximum number of existing session - no room "
253 "for a new session");
254 return NULL;
255 }
256
257 sess = os_zalloc(sizeof(*sess));
258 if (sess == NULL)
259 return NULL;
260
261 sess->server = data;
262 sess->client = client;
263 sess->sess_id = data->next_sess_id++;
264 sess->next = client->sessions;
265 client->sessions = sess;
266 eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0,
267 radius_server_session_timeout, data, sess);
268 data->num_sess++;
269 return sess;
270}
271
272
273static struct radius_session *
274radius_server_get_new_session(struct radius_server_data *data,
275 struct radius_client *client,
276 struct radius_msg *msg)
277{
278 u8 *user;
279 size_t user_len;
280 int res;
281 struct radius_session *sess;
282 struct eap_config eap_conf;
283
284 RADIUS_DEBUG("Creating a new session");
285
286 user = os_malloc(256);
287 if (user == NULL) {
288 return NULL;
289 }
290 res = radius_msg_get_attr(msg, RADIUS_ATTR_USER_NAME, user, 256);
291 if (res < 0 || res > 256) {
292 RADIUS_DEBUG("Could not get User-Name");
293 os_free(user);
294 return NULL;
295 }
296 user_len = res;
297 RADIUS_DUMP_ASCII("User-Name", user, user_len);
298
299 res = data->get_eap_user(data->conf_ctx, user, user_len, 0, NULL);
300 os_free(user);
301
302 if (res == 0) {
303 RADIUS_DEBUG("Matching user entry found");
304 sess = radius_server_new_session(data, client);
305 if (sess == NULL) {
306 RADIUS_DEBUG("Failed to create a new session");
307 return NULL;
308 }
309 } else {
310 RADIUS_DEBUG("User-Name not found from user database");
311 return NULL;
312 }
313
314 os_memset(&eap_conf, 0, sizeof(eap_conf));
315 eap_conf.ssl_ctx = data->ssl_ctx;
316 eap_conf.eap_sim_db_priv = data->eap_sim_db_priv;
317 eap_conf.backend_auth = TRUE;
318 eap_conf.eap_server = 1;
319 eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key;
320 eap_conf.eap_fast_a_id = data->eap_fast_a_id;
2d867244
JM		 321 eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len;
322 eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info;
378eae5e 323 eap_conf.eap_fast_prov = data->eap_fast_prov;
a11c90a6
JM		 324 eap_conf.pac_key_lifetime = data->pac_key_lifetime;
325 eap_conf.pac_key_refresh_time = data->pac_key_refresh_time;
6fc6879b 326 eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind;
c3e258ae 327 eap_conf.tnc = data->tnc;
ad08c363 328 eap_conf.wps = data->wps;
6fc6879b
JM		 329 sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb,
330 &eap_conf);
331 if (sess->eap == NULL) {
332 RADIUS_DEBUG("Failed to initialize EAP state machine for the "
333 "new session");
334 radius_server_session_free(data, sess);
335 return NULL;
336 }
337 sess->eap_if = eap_get_interface(sess->eap);
338 sess->eap_if->eapRestart = TRUE;
339 sess->eap_if->portEnabled = TRUE;
340
341 RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id);
342
343 return sess;
344}
345
346
347static struct radius_msg *
348radius_server_encapsulate_eap(struct radius_server_data *data,
349 struct radius_client *client,
350 struct radius_session *sess,
351 struct radius_msg *request)
352{
353 struct radius_msg *msg;
354 int code;
355 unsigned int sess_id;
356
357 if (sess->eap_if->eapFail) {
358 sess->eap_if->eapFail = FALSE;
359 code = RADIUS_CODE_ACCESS_REJECT;
360 } else if (sess->eap_if->eapSuccess) {
361 sess->eap_if->eapSuccess = FALSE;
362 code = RADIUS_CODE_ACCESS_ACCEPT;
363 } else {
364 sess->eap_if->eapReq = FALSE;
365 code = RADIUS_CODE_ACCESS_CHALLENGE;
366 }
367
368 msg = radius_msg_new(code, request->hdr->identifier);
369 if (msg == NULL) {
370 RADIUS_DEBUG("Failed to allocate reply message");
371 return NULL;
372 }
373
374 sess_id = htonl(sess->sess_id);
375 if (code == RADIUS_CODE_ACCESS_CHALLENGE &&
376 !radius_msg_add_attr(msg, RADIUS_ATTR_STATE,
377 (u8 *) &sess_id, sizeof(sess_id))) {
378 RADIUS_DEBUG("Failed to add State attribute");
379 }
380
381 if (sess->eap_if->eapReqData &&
382 !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData),
383 wpabuf_len(sess->eap_if->eapReqData))) {
384 RADIUS_DEBUG("Failed to add EAP-Message attribute");
385 }
386
387 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) {
388 int len;
389 if (sess->eap_if->eapKeyDataLen > 64) {
390 len = 32;
391 } else {
392 len = sess->eap_if->eapKeyDataLen / 2;
393 }
394 if (!radius_msg_add_mppe_keys(msg, request->hdr->authenticator,
395 (u8 *) client->shared_secret,
396 client->shared_secret_len,
397 sess->eap_if->eapKeyData + len,
398 len, sess->eap_if->eapKeyData,
399 len)) {
400 RADIUS_DEBUG("Failed to add MPPE key attributes");
401 }
402 }
403
404 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
405 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
406 radius_msg_free(msg);
407 os_free(msg);
408 return NULL;
409 }
410
411 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
412 client->shared_secret_len,
413 request->hdr->authenticator) < 0) {
414 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
415 }
416
417 return msg;
418}
419
420
421static int radius_server_reject(struct radius_server_data *data,
422 struct radius_client *client,
423 struct radius_msg *request,
424 struct sockaddr *from, socklen_t fromlen,
425 const char *from_addr, int from_port)
426{
427 struct radius_msg *msg;
428 int ret = 0;
429 struct eap_hdr eapfail;
430
431 RADIUS_DEBUG("Reject invalid request from %s:%d",
432 from_addr, from_port);
433
434 msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT,
435 request->hdr->identifier);
436 if (msg == NULL) {
437 return -1;
438 }
439
440 os_memset(&eapfail, 0, sizeof(eapfail));
441 eapfail.code = EAP_CODE_FAILURE;
442 eapfail.identifier = 0;
443 eapfail.length = host_to_be16(sizeof(eapfail));
444
445 if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) {
446 RADIUS_DEBUG("Failed to add EAP-Message attribute");
447 }
448
449 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
450 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
451 radius_msg_free(msg);
452 os_free(msg);
453 return -1;
454 }
455
456 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
457 client->shared_secret_len,
458 request->hdr->authenticator) < 0) {
459 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
460 }
461
462 if (wpa_debug_level <= MSG_MSGDUMP) {
463 radius_msg_dump(msg);
464 }
465
466 data->counters.access_rejects++;
467 client->counters.access_rejects++;
468 if (sendto(data->auth_sock, msg->buf, msg->buf_used, 0,
469 (struct sockaddr *) from, sizeof(*from)) < 0) {
470 perror("sendto[RADIUS SRV]");
471 ret = -1;
472 }
473
474 radius_msg_free(msg);
475 os_free(msg);
476
477 return ret;
478}
479
480
481static int radius_server_request(struct radius_server_data *data,
482 struct radius_msg *msg,
483 struct sockaddr *from, socklen_t fromlen,
484 struct radius_client *client,
485 const char *from_addr, int from_port,
486 struct radius_session *force_sess)
487{
488 u8 *eap = NULL;
489 size_t eap_len;
490 int res, state_included = 0;
491 u8 statebuf[4];
492 unsigned int state;
493 struct radius_session *sess;
494 struct radius_msg *reply;
7598210b 495 int is_complete = 0;
6fc6879b
JM		 496
497 if (force_sess)
498 sess = force_sess;
499 else {
500 res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
501 sizeof(statebuf));
502 state_included = res >= 0;
503 if (res == sizeof(statebuf)) {
504 state = WPA_GET_BE32(statebuf);
505 sess = radius_server_get_session(client, state);
506 } else {
507 sess = NULL;
508 }
509 }
510
511 if (sess) {
512 RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
513 } else if (state_included) {
514 RADIUS_DEBUG("State attribute included but no session found");
515 radius_server_reject(data, client, msg, from, fromlen,
516 from_addr, from_port);
517 return -1;
518 } else {
519 sess = radius_server_get_new_session(data, client, msg);
520 if (sess == NULL) {
521 RADIUS_DEBUG("Could not create a new session");
522 radius_server_reject(data, client, msg, from, fromlen,
523 from_addr, from_port);
524 return -1;
525 }
526 }
527
528 if (sess->last_from_port == from_port &&
529 sess->last_identifier == msg->hdr->identifier &&
530 os_memcmp(sess->last_authenticator, msg->hdr->authenticator, 16) ==
531 0) {
532 RADIUS_DEBUG("Duplicate message from %s", from_addr);
533 data->counters.dup_access_requests++;
534 client->counters.dup_access_requests++;
535
536 if (sess->last_reply) {
537 res = sendto(data->auth_sock, sess->last_reply->buf,
538 sess->last_reply->buf_used, 0,
539 (struct sockaddr *) from, fromlen);
540 if (res < 0) {
541 perror("sendto[RADIUS SRV]");
542 }
543 return 0;
544 }
545
546 RADIUS_DEBUG("No previous reply available for duplicate "
547 "message");
548 return -1;
549 }
550
551 eap = radius_msg_get_eap(msg, &eap_len);
552 if (eap == NULL) {
553 RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
554 from_addr);
555 data->counters.packets_dropped++;
556 client->counters.packets_dropped++;
557 return -1;
558 }
559
560 RADIUS_DUMP("Received EAP data", eap, eap_len);
561
562 /* FIX: if Code is Request, Success, or Failure, send Access-Reject;
563 * RFC3579 Sect. 2.6.2.
564 * Include EAP-Response/Nak with no preferred method if
565 * code == request.
566 * If code is not 1-4, discard the packet silently.
567 * Or is this already done by the EAP state machine? */
568
569 wpabuf_free(sess->eap_if->eapRespData);
570 sess->eap_if->eapRespData = wpabuf_alloc_ext_data(eap, eap_len);
571 if (sess->eap_if->eapRespData == NULL)
572 os_free(eap);
573 eap = NULL;
574 sess->eap_if->eapResp = TRUE;
575 eap_server_sm_step(sess->eap);
576
577 if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
578 sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
579 RADIUS_DUMP("EAP data from the state machine",
580 wpabuf_head(sess->eap_if->eapReqData),
581 wpabuf_len(sess->eap_if->eapReqData));
582 } else if (sess->eap_if->eapFail) {
583 RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
584 "set");
585 } else if (eap_sm_method_pending(sess->eap)) {
586 if (sess->last_msg) {
587 radius_msg_free(sess->last_msg);
588 os_free(sess->last_msg);
589 }
590 sess->last_msg = msg;
591 sess->last_from_port = from_port;
592 os_free(sess->last_from_addr);
593 sess->last_from_addr = os_strdup(from_addr);
594 sess->last_fromlen = fromlen;
595 os_memcpy(&sess->last_from, from, fromlen);
596 return -2;
597 } else {
598 RADIUS_DEBUG("No EAP data from the state machine - ignore this"
599 " Access-Request silently (assuming it was a "
600 "duplicate)");
601 data->counters.packets_dropped++;
602 client->counters.packets_dropped++;
603 return -1;
604 }
605
7598210b
AB		 606 if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
607 is_complete = 1;
608
6fc6879b
JM		 609 reply = radius_server_encapsulate_eap(data, client, sess, msg);
610
611 if (reply) {
612 RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port);
613 if (wpa_debug_level <= MSG_MSGDUMP) {
614 radius_msg_dump(reply);
615 }
616
617 switch (reply->hdr->code) {
618 case RADIUS_CODE_ACCESS_ACCEPT:
619 data->counters.access_accepts++;
620 client->counters.access_accepts++;
621 break;
622 case RADIUS_CODE_ACCESS_REJECT:
623 data->counters.access_rejects++;
624 client->counters.access_rejects++;
625 break;
626 case RADIUS_CODE_ACCESS_CHALLENGE:
627 data->counters.access_challenges++;
628 client->counters.access_challenges++;
629 break;
630 }
631 res = sendto(data->auth_sock, reply->buf, reply->buf_used, 0,
632 (struct sockaddr *) from, fromlen);
633 if (res < 0) {
634 perror("sendto[RADIUS SRV]");
635 }
636 if (sess->last_reply) {
637 radius_msg_free(sess->last_reply);
638 os_free(sess->last_reply);
639 }
640 sess->last_reply = reply;
641 sess->last_from_port = from_port;
642 sess->last_identifier = msg->hdr->identifier;
643 os_memcpy(sess->last_authenticator, msg->hdr->authenticator,
644 16);
645 } else {
646 data->counters.packets_dropped++;
647 client->counters.packets_dropped++;
648 }
649
7598210b 650 if (is_complete) {
6fc6879b
JM		 651 RADIUS_DEBUG("Removing completed session 0x%x after timeout",
652 sess->sess_id);
653 eloop_cancel_timeout(radius_server_session_remove_timeout,
654 data, sess);
655 eloop_register_timeout(10, 0,
656 radius_server_session_remove_timeout,
657 data, sess);
658 }
659
660 return 0;
661}
662
663
664static void radius_server_receive_auth(int sock, void *eloop_ctx,
665 void *sock_ctx)
666{
667 struct radius_server_data *data = eloop_ctx;
668 u8 *buf = NULL;
5a641ae0
JM		 669 union {
670 struct sockaddr_storage ss;
671 struct sockaddr_in sin;
672#ifdef CONFIG_IPV6
673 struct sockaddr_in6 sin6;
674#endif /* CONFIG_IPV6 */
675 } from;
6fc6879b
JM		 676 socklen_t fromlen;
677 int len;
678 struct radius_client *client = NULL;
679 struct radius_msg *msg = NULL;
680 char abuf[50];
681 int from_port = 0;
682
683 buf = os_malloc(RADIUS_MAX_MSG_LEN);
684 if (buf == NULL) {
685 goto fail;
686 }
687
688 fromlen = sizeof(from);
689 len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
5a641ae0 690 (struct sockaddr *) &from.ss, &fromlen);
6fc6879b
JM		 691 if (len < 0) {
692 perror("recvfrom[radius_server]");
693 goto fail;
694 }
695
696#ifdef CONFIG_IPV6
697 if (data->ipv6) {
5a641ae0
JM		 698 if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
699 sizeof(abuf)) == NULL)
6fc6879b 700 abuf[0] = '\0';
5a641ae0 701 from_port = ntohs(from.sin6.sin6_port);
6fc6879b
JM		 702 RADIUS_DEBUG("Received %d bytes from %s:%d",
703 len, abuf, from_port);
704
705 client = radius_server_get_client(data,
706 (struct in_addr *)
5a641ae0 707 &from.sin6.sin6_addr, 1);
6fc6879b
JM		 708 }
709#endif /* CONFIG_IPV6 */
710
711 if (!data->ipv6) {
5a641ae0
JM		 712 os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
713 from_port = ntohs(from.sin.sin_port);
6fc6879b
JM		 714 RADIUS_DEBUG("Received %d bytes from %s:%d",
715 len, abuf, from_port);
716
5a641ae0 717 client = radius_server_get_client(data, &from.sin.sin_addr, 0);
6fc6879b
JM		 718 }
719
720 RADIUS_DUMP("Received data", buf, len);
721
722 if (client == NULL) {
723 RADIUS_DEBUG("Unknown client %s - packet ignored", abuf);
724 data->counters.invalid_requests++;
725 goto fail;
726 }
727
728 msg = radius_msg_parse(buf, len);
729 if (msg == NULL) {
730 RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
731 data->counters.malformed_access_requests++;
732 client->counters.malformed_access_requests++;
733 goto fail;
734 }
735
736 os_free(buf);
737 buf = NULL;
738
739 if (wpa_debug_level <= MSG_MSGDUMP) {
740 radius_msg_dump(msg);
741 }
742
743 if (msg->hdr->code != RADIUS_CODE_ACCESS_REQUEST) {
744 RADIUS_DEBUG("Unexpected RADIUS code %d", msg->hdr->code);
745 data->counters.unknown_types++;
746 client->counters.unknown_types++;
747 goto fail;
748 }
749
750 data->counters.access_requests++;
751 client->counters.access_requests++;
752
753 if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret,
754 client->shared_secret_len, NULL)) {
755 RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf);
756 data->counters.bad_authenticators++;
757 client->counters.bad_authenticators++;
758 goto fail;
759 }
760
761 if (radius_server_request(data, msg, (struct sockaddr *) &from,
762 fromlen, client, abuf, from_port, NULL) ==
763 -2)
764 return; /* msg was stored with the session */
765
766fail:
767 if (msg) {
768 radius_msg_free(msg);
769 os_free(msg);
770 }
771 os_free(buf);
772}
773
774
5cd89c26
JM		 775static int radius_server_disable_pmtu_discovery(int s)
776{
777 int r = -1;
778#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
779 /* Turn off Path MTU discovery on IPv4/UDP sockets. */
780 int action = IP_PMTUDISC_DONT;
781 r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
782 sizeof(action));
783 if (r == -1)
784 wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: "
785 "%s", strerror(errno));
786#endif
787 return r;
788}
789
790
6fc6879b
JM		 791static int radius_server_open_socket(int port)
792{
793 int s;
794 struct sockaddr_in addr;
795
796 s = socket(PF_INET, SOCK_DGRAM, 0);
797 if (s < 0) {
798 perror("socket");
799 return -1;
800 }
801
5cd89c26
JM		 802 radius_server_disable_pmtu_discovery(s);
803
6fc6879b
JM		 804 os_memset(&addr, 0, sizeof(addr));
805 addr.sin_family = AF_INET;
806 addr.sin_port = htons(port);
807 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
808 perror("bind");
809 close(s);
810 return -1;
811 }
812
813 return s;
814}
815
816
817#ifdef CONFIG_IPV6
818static int radius_server_open_socket6(int port)
819{
820 int s;
821 struct sockaddr_in6 addr;
822
823 s = socket(PF_INET6, SOCK_DGRAM, 0);
824 if (s < 0) {
825 perror("socket[IPv6]");
826 return -1;
827 }
828
829 os_memset(&addr, 0, sizeof(addr));
830 addr.sin6_family = AF_INET6;
831 os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any));
832 addr.sin6_port = htons(port);
833 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
834 perror("bind");
835 close(s);
836 return -1;
837 }
838
839 return s;
840}
841#endif /* CONFIG_IPV6 */
842
843
844static void radius_server_free_sessions(struct radius_server_data *data,
845 struct radius_session *sessions)
846{
847 struct radius_session *session, *prev;
848
849 session = sessions;
850 while (session) {
851 prev = session;
852 session = session->next;
853 radius_server_session_free(data, prev);
854 }
855}
856
857
858static void radius_server_free_clients(struct radius_server_data *data,
859 struct radius_client *clients)
860{
861 struct radius_client *client, *prev;
862
863 client = clients;
864 while (client) {
865 prev = client;
866 client = client->next;
867
868 radius_server_free_sessions(data, prev->sessions);
869 os_free(prev->shared_secret);
870 os_free(prev);
871 }
872}
873
874
875static struct radius_client *
876radius_server_read_clients(const char *client_file, int ipv6)
877{
878 FILE *f;
879 const int buf_size = 1024;
880 char *buf, *pos;
881 struct radius_client *clients, *tail, *entry;
882 int line = 0, mask, failed = 0, i;
883 struct in_addr addr;
884#ifdef CONFIG_IPV6
885 struct in6_addr addr6;
886#endif /* CONFIG_IPV6 */
887 unsigned int val;
888
889 f = fopen(client_file, "r");
890 if (f == NULL) {
891 RADIUS_ERROR("Could not open client file '%s'", client_file);
892 return NULL;
893 }
894
895 buf = os_malloc(buf_size);
896 if (buf == NULL) {
897 fclose(f);
898 return NULL;
899 }
900
901 clients = tail = NULL;
902 while (fgets(buf, buf_size, f)) {
903 /* Configuration file format:
904 * 192.168.1.0/24 secret
905 * 192.168.1.2 secret
906 * fe80::211:22ff:fe33:4455/64 secretipv6
907 */
908 line++;
909 buf[buf_size - 1] = '\0';
910 pos = buf;
911 while (*pos != '\0' && *pos != '\n')
912 pos++;
913 if (*pos == '\n')
914 *pos = '\0';
915 if (*buf == '\0' || *buf == '#')
916 continue;
917
918 pos = buf;
919 while ((*pos >= '0' && *pos <= '9') || *pos == '.' ||
920 (*pos >= 'a' && *pos <= 'f') || *pos == ':' ||
921 (*pos >= 'A' && *pos <= 'F')) {
922 pos++;
923 }
924
925 if (*pos == '\0') {
926 failed = 1;
927 break;
928 }
929
930 if (*pos == '/') {
931 char *end;
932 *pos++ = '\0';
933 mask = strtol(pos, &end, 10);
934 if ((pos == end) ||
935 (mask < 0 || mask > (ipv6 ? 128 : 32))) {
936 failed = 1;
937 break;
938 }
939 pos = end;
940 } else {
941 mask = ipv6 ? 128 : 32;
942 *pos++ = '\0';
943 }
944
945 if (!ipv6 && inet_aton(buf, &addr) == 0) {
946 failed = 1;
947 break;
948 }
949#ifdef CONFIG_IPV6
950 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) {
951 if (inet_pton(AF_INET, buf, &addr) <= 0) {
952 failed = 1;
953 break;
954 }
955 /* Convert IPv4 address to IPv6 */
956 if (mask <= 32)
957 mask += (128 - 32);
958 os_memset(addr6.s6_addr, 0, 10);
959 addr6.s6_addr[10] = 0xff;
960 addr6.s6_addr[11] = 0xff;
961 os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr,
962 4);
963 }
964#endif /* CONFIG_IPV6 */
965
966 while (*pos == ' ' || *pos == '\t') {
967 pos++;
968 }
969
970 if (*pos == '\0') {
971 failed = 1;
972 break;
973 }
974
975 entry = os_zalloc(sizeof(*entry));
976 if (entry == NULL) {
977 failed = 1;
978 break;
979 }
980 entry->shared_secret = os_strdup(pos);
981 if (entry->shared_secret == NULL) {
982 failed = 1;
983 os_free(entry);
984 break;
985 }
986 entry->shared_secret_len = os_strlen(entry->shared_secret);
987 entry->addr.s_addr = addr.s_addr;
988 if (!ipv6) {
989 val = 0;
990 for (i = 0; i < mask; i++)
991 val |= 1 << (31 - i);
992 entry->mask.s_addr = htonl(val);
993 }
994#ifdef CONFIG_IPV6
995 if (ipv6) {
996 int offset = mask / 8;
997
998 os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16);
999 os_memset(entry->mask6.s6_addr, 0xff, offset);
1000 val = 0;
1001 for (i = 0; i < (mask % 8); i++)
1002 val |= 1 << (7 - i);
1003 if (offset < 16)
1004 entry->mask6.s6_addr[offset] = val;
1005 }
1006#endif /* CONFIG_IPV6 */
1007
1008 if (tail == NULL) {
1009 clients = tail = entry;
1010 } else {
1011 tail->next = entry;
1012 tail = entry;
1013 }
1014 }
1015
1016 if (failed) {
1017 RADIUS_ERROR("Invalid line %d in '%s'", line, client_file);
1018 radius_server_free_clients(NULL, clients);
1019 clients = NULL;
1020 }
1021
1022 os_free(buf);
1023 fclose(f);
1024
1025 return clients;
1026}
1027
1028
1029struct radius_server_data *
1030radius_server_init(struct radius_server_conf *conf)
1031{
1032 struct radius_server_data *data;
1033
1034#ifndef CONFIG_IPV6
1035 if (conf->ipv6) {
1036 fprintf(stderr, "RADIUS server compiled without IPv6 "
1037 "support.\n");
1038 return NULL;
1039 }
1040#endif /* CONFIG_IPV6 */
1041
1042 data = os_zalloc(sizeof(*data));
1043 if (data == NULL)
1044 return NULL;
1045
1046 os_get_time(&data->start_time);
1047 data->conf_ctx = conf->conf_ctx;
1048 data->eap_sim_db_priv = conf->eap_sim_db_priv;
1049 data->ssl_ctx = conf->ssl_ctx;
1050 data->ipv6 = conf->ipv6;
1051 if (conf->pac_opaque_encr_key) {
1052 data->pac_opaque_encr_key = os_malloc(16);
1053 os_memcpy(data->pac_opaque_encr_key, conf->pac_opaque_encr_key,
1054 16);
1055 }
2d867244
JM		 1056 if (conf->eap_fast_a_id) {
1057 data->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len);
1058 if (data->eap_fast_a_id) {
1059 os_memcpy(data->eap_fast_a_id, conf->eap_fast_a_id,
1060 conf->eap_fast_a_id_len);
1061 data->eap_fast_a_id_len = conf->eap_fast_a_id_len;
1062 }
1063 }
1064 if (conf->eap_fast_a_id_info)
1065 data->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info);
378eae5e 1066 data->eap_fast_prov = conf->eap_fast_prov;
a11c90a6
JM		 1067 data->pac_key_lifetime = conf->pac_key_lifetime;
1068 data->pac_key_refresh_time = conf->pac_key_refresh_time;
6fc6879b
JM		 1069 data->get_eap_user = conf->get_eap_user;
1070 data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind;
c3e258ae 1071 data->tnc = conf->tnc;
ad08c363 1072 data->wps = conf->wps;
65d50f0a
JM		 1073 if (conf->eap_req_id_text) {
1074 data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len);
1075 if (data->eap_req_id_text) {
1076 os_memcpy(data->eap_req_id_text, conf->eap_req_id_text,
1077 conf->eap_req_id_text_len);
1078 data->eap_req_id_text_len = conf->eap_req_id_text_len;
1079 }
1080 }
6fc6879b
JM		 1081
1082 data->clients = radius_server_read_clients(conf->client_file,
1083 conf->ipv6);
1084 if (data->clients == NULL) {
1085 printf("No RADIUS clients configured.\n");
1086 radius_server_deinit(data);
1087 return NULL;
1088 }
1089
1090#ifdef CONFIG_IPV6
1091 if (conf->ipv6)
1092 data->auth_sock = radius_server_open_socket6(conf->auth_port);
1093 else
1094#endif /* CONFIG_IPV6 */
1095 data->auth_sock = radius_server_open_socket(conf->auth_port);
1096 if (data->auth_sock < 0) {
1097 printf("Failed to open UDP socket for RADIUS authentication "
1098 "server\n");
1099 radius_server_deinit(data);
1100 return NULL;
1101 }
1102 if (eloop_register_read_sock(data->auth_sock,
1103 radius_server_receive_auth,
1104 data, NULL)) {
1105 radius_server_deinit(data);
1106 return NULL;
1107 }
1108
1109 return data;
1110}
1111
1112
1113void radius_server_deinit(struct radius_server_data *data)
1114{
1115 if (data == NULL)
1116 return;
1117
1118 if (data->auth_sock >= 0) {
1119 eloop_unregister_read_sock(data->auth_sock);
1120 close(data->auth_sock);
1121 }
1122
1123 radius_server_free_clients(data, data->clients);
1124
1125 os_free(data->pac_opaque_encr_key);
1126 os_free(data->eap_fast_a_id);
2d867244 1127 os_free(data->eap_fast_a_id_info);
65d50f0a 1128 os_free(data->eap_req_id_text);
6fc6879b
JM		 1129 os_free(data);
1130}
1131
1132
1133int radius_server_get_mib(struct radius_server_data *data, char *buf,
1134 size_t buflen)
1135{
1136 int ret, uptime;
1137 unsigned int idx;
1138 char *end, *pos;
1139 struct os_time now;
1140 struct radius_client *cli;
1141
1142 /* RFC 2619 - RADIUS Authentication Server MIB */
1143
1144 if (data == NULL || buflen == 0)
1145 return 0;
1146
1147 pos = buf;
1148 end = buf + buflen;
1149
1150 os_get_time(&now);
1151 uptime = (now.sec - data->start_time.sec) * 100 +
1152 ((now.usec - data->start_time.usec) / 10000) % 100;
1153 ret = os_snprintf(pos, end - pos,
1154 "RADIUS-AUTH-SERVER-MIB\n"
1155 "radiusAuthServIdent=hostapd\n"
1156 "radiusAuthServUpTime=%d\n"
1157 "radiusAuthServResetTime=0\n"
1158 "radiusAuthServConfigReset=4\n",
1159 uptime);
1160 if (ret < 0 || ret >= end - pos) {
1161 *pos = '\0';
1162 return pos - buf;
1163 }
1164 pos += ret;
1165
1166 ret = os_snprintf(pos, end - pos,
1167 "radiusAuthServTotalAccessRequests=%u\n"
1168 "radiusAuthServTotalInvalidRequests=%u\n"
1169 "radiusAuthServTotalDupAccessRequests=%u\n"
1170 "radiusAuthServTotalAccessAccepts=%u\n"
1171 "radiusAuthServTotalAccessRejects=%u\n"
1172 "radiusAuthServTotalAccessChallenges=%u\n"
1173 "radiusAuthServTotalMalformedAccessRequests=%u\n"
1174 "radiusAuthServTotalBadAuthenticators=%u\n"
1175 "radiusAuthServTotalPacketsDropped=%u\n"
1176 "radiusAuthServTotalUnknownTypes=%u\n",
1177 data->counters.access_requests,
1178 data->counters.invalid_requests,
1179 data->counters.dup_access_requests,
1180 data->counters.access_accepts,
1181 data->counters.access_rejects,
1182 data->counters.access_challenges,
1183 data->counters.malformed_access_requests,
1184 data->counters.bad_authenticators,
1185 data->counters.packets_dropped,
1186 data->counters.unknown_types);
1187 if (ret < 0 || ret >= end - pos) {
1188 *pos = '\0';
1189 return pos - buf;
1190 }
1191 pos += ret;
1192
1193 for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) {
1194 char abuf[50], mbuf[50];
1195#ifdef CONFIG_IPV6
1196 if (data->ipv6) {
1197 if (inet_ntop(AF_INET6, &cli->addr6, abuf,
1198 sizeof(abuf)) == NULL)
1199 abuf[0] = '\0';
1200 if (inet_ntop(AF_INET6, &cli->mask6, abuf,
1201 sizeof(mbuf)) == NULL)
1202 mbuf[0] = '\0';
1203 }
1204#endif /* CONFIG_IPV6 */
1205 if (!data->ipv6) {
1206 os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf));
1207 os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf));
1208 }
1209
1210 ret = os_snprintf(pos, end - pos,
1211 "radiusAuthClientIndex=%u\n"
1212 "radiusAuthClientAddress=%s/%s\n"
1213 "radiusAuthServAccessRequests=%u\n"
1214 "radiusAuthServDupAccessRequests=%u\n"
1215 "radiusAuthServAccessAccepts=%u\n"
1216 "radiusAuthServAccessRejects=%u\n"
1217 "radiusAuthServAccessChallenges=%u\n"
1218 "radiusAuthServMalformedAccessRequests=%u\n"
1219 "radiusAuthServBadAuthenticators=%u\n"
1220 "radiusAuthServPacketsDropped=%u\n"
1221 "radiusAuthServUnknownTypes=%u\n",
1222 idx,
1223 abuf, mbuf,
1224 cli->counters.access_requests,
1225 cli->counters.dup_access_requests,
1226 cli->counters.access_accepts,
1227 cli->counters.access_rejects,
1228 cli->counters.access_challenges,
1229 cli->counters.malformed_access_requests,
1230 cli->counters.bad_authenticators,
1231 cli->counters.packets_dropped,
1232 cli->counters.unknown_types);
1233 if (ret < 0 || ret >= end - pos) {
1234 *pos = '\0';
1235 return pos - buf;
1236 }
1237 pos += ret;
1238 }
1239
1240 return pos - buf;
1241}
1242
1243
1244static int radius_server_get_eap_user(void *ctx, const u8 *identity,
1245 size_t identity_len, int phase2,
1246 struct eap_user *user)
1247{
1248 struct radius_session *sess = ctx;
1249 struct radius_server_data *data = sess->server;
1250
1251 return data->get_eap_user(data->conf_ctx, identity, identity_len,
1252 phase2, user);
1253}
1254
1255
65d50f0a
JM		 1256static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len)
1257{
1258 struct radius_session *sess = ctx;
1259 struct radius_server_data *data = sess->server;
1260 *len = data->eap_req_id_text_len;
1261 return data->eap_req_id_text;
1262}
1263
1264
6fc6879b
JM		 1265static struct eapol_callbacks radius_server_eapol_cb =
1266{
1267 .get_eap_user = radius_server_get_eap_user,
65d50f0a 1268 .get_eap_req_id_text = radius_server_get_eap_req_id_text,
6fc6879b
JM		 1269};
1270
1271
1272void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx)
1273{
1274 struct radius_client *cli;
1275 struct radius_session *s, *sess = NULL;
1276 struct radius_msg *msg;
1277
1278 if (data == NULL)
1279 return;
1280
1281 for (cli = data->clients; cli; cli = cli->next) {
1282 for (s = cli->sessions; s; s = s->next) {
1283 if (s->eap == ctx && s->last_msg) {
1284 sess = s;
1285 break;
1286 }
1287 if (sess)
1288 break;
1289 }
1290 if (sess)
1291 break;
1292 }
1293
1294 if (sess == NULL) {
1295 RADIUS_DEBUG("No session matched callback ctx");
1296 return;
1297 }
1298
1299 msg = sess->last_msg;
1300 sess->last_msg = NULL;
1301 eap_sm_pending_cb(sess->eap);
1302 if (radius_server_request(data, msg,
1303 (struct sockaddr *) &sess->last_from,
1304 sess->last_fromlen, cli,
1305 sess->last_from_addr,
1306 sess->last_from_port, sess) == -2)
1307 return; /* msg was stored with the session */
1308
1309 radius_msg_free(msg);
1310 os_free(msg);
1311}
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