1 /*
2 * RADIUS client
3 * Copyright (c) 2002-2009, 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
11 #include "common.h"
12 #include "radius.h"
13 #include "radius_client.h"
14 #include "eloop.h"
15
16 /* Defaults for RADIUS retransmit values (exponential backoff) */
17
18 /**
19 * RADIUS_CLIENT_FIRST_WAIT - RADIUS client timeout for first retry in seconds
20 */
21 #define RADIUS_CLIENT_FIRST_WAIT 3
22
23 /**
24 * RADIUS_CLIENT_MAX_WAIT - RADIUS client maximum retry timeout in seconds
25 */
26 #define RADIUS_CLIENT_MAX_WAIT 120
27
28 /**
29 * RADIUS_CLIENT_MAX_RETRIES - RADIUS client maximum retries
30 *
31 * Maximum number of retransmit attempts before the entry is removed from
32 * retransmit list.
33 */
34 #define RADIUS_CLIENT_MAX_RETRIES 10
35
36 /**
37 * RADIUS_CLIENT_MAX_ENTRIES - RADIUS client maximum pending messages
38 *
39 * Maximum number of entries in retransmit list (oldest entries will be
40 * removed, if this limit is exceeded).
41 */
42 #define RADIUS_CLIENT_MAX_ENTRIES 30
43
44 /**
45 * RADIUS_CLIENT_NUM_FAILOVER - RADIUS client failover point
46 *
47 * The number of failed retry attempts after which the RADIUS server will be
48 * changed (if one of more backup servers are configured).
49 */
50 #define RADIUS_CLIENT_NUM_FAILOVER 4
51
52
53 /**
54 * struct radius_rx_handler - RADIUS client RX handler
55 *
56 * This data structure is used internally inside the RADIUS client module to
57 * store registered RX handlers. These handlers are registered by calls to
58 * radius_client_register() and unregistered when the RADIUS client is
59 * deinitialized with a call to radius_client_deinit().
60 */
61 struct radius_rx_handler {
62 /**
63 * handler - Received RADIUS message handler
64 */
65 RadiusRxResult (*handler)(struct radius_msg *msg,
66 struct radius_msg *req,
67 const u8 *shared_secret,
68 size_t shared_secret_len,
69 void *data);
70
71 /**
72 * data - Context data for the handler
73 */
74 void *data;
75 };
76
77
78 /**
79 * struct radius_msg_list - RADIUS client message retransmit list
80 *
81 * This data structure is used internally inside the RADIUS client module to
82 * store pending RADIUS requests that may still need to be retransmitted.
83 */
84 struct radius_msg_list {
85 /**
86 * addr - STA/client address
87 *
88 * This is used to find RADIUS messages for the same STA.
89 */
90 u8 addr[ETH_ALEN];
91
92 /**
93 * msg - RADIUS message
94 */
95 struct radius_msg *msg;
96
97 /**
98 * msg_type - Message type
99 */
100 RadiusType msg_type;
101
102 /**
103 * first_try - Time of the first transmission attempt
104 */
105 os_time_t first_try;
106
107 /**
108 * next_try - Time for the next transmission attempt
109 */
110 os_time_t next_try;
111
112 /**
113 * attempts - Number of transmission attempts
114 */
115 int attempts;
116
117 /**
118 * next_wait - Next retransmission wait time in seconds
119 */
120 int next_wait;
121
122 /**
123 * last_attempt - Time of the last transmission attempt
124 */
125 struct os_time last_attempt;
126
127 /**
128 * shared_secret - Shared secret with the target RADIUS server
129 */
130 const u8 *shared_secret;
131
132 /**
133 * shared_secret_len - shared_secret length in octets
134 */
135 size_t shared_secret_len;
136
137 /* TODO: server config with failover to backup server(s) */
138
139 /**
140 * next - Next message in the list
141 */
142 struct radius_msg_list *next;
143 };
144
145
146 /**
147 * struct radius_client_data - Internal RADIUS client data
148 *
149 * This data structure is used internally inside the RADIUS client module.
150 * External users allocate this by calling radius_client_init() and free it by
151 * calling radius_client_deinit(). The pointer to this opaque data is used in
152 * calls to other functions as an identifier for the RADIUS client instance.
153 */
154 struct radius_client_data {
155 /**
156 * ctx - Context pointer for hostapd_logger() callbacks
157 */
158 void *ctx;
159
160 /**
161 * conf - RADIUS client configuration (list of RADIUS servers to use)
162 */
163 struct hostapd_radius_servers *conf;
164
165 /**
166 * auth_serv_sock - IPv4 socket for RADIUS authentication messages
167 */
168 int auth_serv_sock;
169
170 /**
171 * acct_serv_sock - IPv4 socket for RADIUS accounting messages
172 */
173 int acct_serv_sock;
174
175 /**
176 * auth_serv_sock6 - IPv6 socket for RADIUS authentication messages
177 */
178 int auth_serv_sock6;
179
180 /**
181 * acct_serv_sock6 - IPv6 socket for RADIUS accounting messages
182 */
183 int acct_serv_sock6;
184
185 /**
186 * auth_sock - Currently used socket for RADIUS authentication server
187 */
188 int auth_sock;
189
190 /**
191 * acct_sock - Currently used socket for RADIUS accounting server
192 */
193 int acct_sock;
194
195 /**
196 * auth_handlers - Authentication message handlers
197 */
198 struct radius_rx_handler *auth_handlers;
199
200 /**
201 * num_auth_handlers - Number of handlers in auth_handlers
202 */
203 size_t num_auth_handlers;
204
205 /**
206 * acct_handlers - Accounting message handlers
207 */
208 struct radius_rx_handler *acct_handlers;
209
210 /**
211 * num_acct_handlers - Number of handlers in acct_handlers
212 */
213 size_t num_acct_handlers;
214
215 /**
216 * msgs - Pending outgoing RADIUS messages
217 */
218 struct radius_msg_list *msgs;
219
220 /**
221 * num_msgs - Number of pending messages in the msgs list
222 */
223 size_t num_msgs;
224
225 /**
226 * next_radius_identifier - Next RADIUS message identifier to use
227 */
228 u8 next_radius_identifier;
229 };
230
231
232 static int
233 radius_change_server(struct radius_client_data *radius,
234 struct hostapd_radius_server *nserv,
235 struct hostapd_radius_server *oserv,
236 int sock, int sock6, int auth);
237 static int radius_client_init_acct(struct radius_client_data *radius);
238 static int radius_client_init_auth(struct radius_client_data *radius);
239
240
radius_client_msg_free(struct radius_msg_list * req)241 static void radius_client_msg_free(struct radius_msg_list *req)
242 {
243 radius_msg_free(req->msg);
244 os_free(req);
245 }
246
247
248 /**
249 * radius_client_register - Register a RADIUS client RX handler
250 * @radius: RADIUS client context from radius_client_init()
251 * @msg_type: RADIUS client type (RADIUS_AUTH or RADIUS_ACCT)
252 * @handler: Handler for received RADIUS messages
253 * @data: Context pointer for handler callbacks
254 * Returns: 0 on success, -1 on failure
255 *
256 * This function is used to register a handler for processing received RADIUS
257 * authentication and accounting messages. The handler() callback function will
258 * be called whenever a RADIUS message is received from the active server.
259 *
260 * There can be multiple registered RADIUS message handlers. The handlers will
261 * be called in order until one of them indicates that it has processed or
262 * queued the message.
263 */
radius_client_register(struct radius_client_data * radius,RadiusType msg_type,RadiusRxResult (* handler)(struct radius_msg * msg,struct radius_msg * req,const u8 * shared_secret,size_t shared_secret_len,void * data),void * data)264 int radius_client_register(struct radius_client_data *radius,
265 RadiusType msg_type,
266 RadiusRxResult (*handler)(struct radius_msg *msg,
267 struct radius_msg *req,
268 const u8 *shared_secret,
269 size_t shared_secret_len,
270 void *data),
271 void *data)
272 {
273 struct radius_rx_handler **handlers, *newh;
274 size_t *num;
275
276 if (msg_type == RADIUS_ACCT) {
277 handlers = &radius->acct_handlers;
278 num = &radius->num_acct_handlers;
279 } else {
280 handlers = &radius->auth_handlers;
281 num = &radius->num_auth_handlers;
282 }
283
284 newh = os_realloc_array(*handlers, *num + 1,
285 sizeof(struct radius_rx_handler));
286 if (newh == NULL)
287 return -1;
288
289 newh[*num].handler = handler;
290 newh[*num].data = data;
291 (*num)++;
292 *handlers = newh;
293
294 return 0;
295 }
296
297
radius_client_handle_send_error(struct radius_client_data * radius,int s,RadiusType msg_type)298 static void radius_client_handle_send_error(struct radius_client_data *radius,
299 int s, RadiusType msg_type)
300 {
301 #ifndef CONFIG_NATIVE_WINDOWS
302 int _errno = errno;
303 perror("send[RADIUS]");
304 if (_errno == ENOTCONN || _errno == EDESTADDRREQ || _errno == EINVAL ||
305 _errno == EBADF) {
306 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
307 HOSTAPD_LEVEL_INFO,
308 "Send failed - maybe interface status changed -"
309 " try to connect again");
310 eloop_unregister_read_sock(s);
311 close(s);
312 if (msg_type == RADIUS_ACCT || msg_type == RADIUS_ACCT_INTERIM)
313 radius_client_init_acct(radius);
314 else
315 radius_client_init_auth(radius);
316 }
317 #endif /* CONFIG_NATIVE_WINDOWS */
318 }
319
320
radius_client_retransmit(struct radius_client_data * radius,struct radius_msg_list * entry,os_time_t now)321 static int radius_client_retransmit(struct radius_client_data *radius,
322 struct radius_msg_list *entry,
323 os_time_t now)
324 {
325 struct hostapd_radius_servers *conf = radius->conf;
326 int s;
327 struct wpabuf *buf;
328
329 if (entry->msg_type == RADIUS_ACCT ||
330 entry->msg_type == RADIUS_ACCT_INTERIM) {
331 s = radius->acct_sock;
332 if (entry->attempts == 0)
333 conf->acct_server->requests++;
334 else {
335 conf->acct_server->timeouts++;
336 conf->acct_server->retransmissions++;
337 }
338 } else {
339 s = radius->auth_sock;
340 if (entry->attempts == 0)
341 conf->auth_server->requests++;
342 else {
343 conf->auth_server->timeouts++;
344 conf->auth_server->retransmissions++;
345 }
346 }
347
348 /* retransmit; remove entry if too many attempts */
349 entry->attempts++;
350 hostapd_logger(radius->ctx, entry->addr, HOSTAPD_MODULE_RADIUS,
351 HOSTAPD_LEVEL_DEBUG, "Resending RADIUS message (id=%d)",
352 radius_msg_get_hdr(entry->msg)->identifier);
353
354 os_get_time(&entry->last_attempt);
355 buf = radius_msg_get_buf(entry->msg);
356 if (send(s, wpabuf_head(buf), wpabuf_len(buf), 0) < 0)
357 radius_client_handle_send_error(radius, s, entry->msg_type);
358
359 entry->next_try = now + entry->next_wait;
360 entry->next_wait *= 2;
361 if (entry->next_wait > RADIUS_CLIENT_MAX_WAIT)
362 entry->next_wait = RADIUS_CLIENT_MAX_WAIT;
363 if (entry->attempts >= RADIUS_CLIENT_MAX_RETRIES) {
364 printf("Removing un-ACKed RADIUS message due to too many "
365 "failed retransmit attempts\n");
366 return 1;
367 }
368
369 return 0;
370 }
371
372
radius_client_timer(void * eloop_ctx,void * timeout_ctx)373 static void radius_client_timer(void *eloop_ctx, void *timeout_ctx)
374 {
375 struct radius_client_data *radius = eloop_ctx;
376 struct hostapd_radius_servers *conf = radius->conf;
377 struct os_time now;
378 os_time_t first;
379 struct radius_msg_list *entry, *prev, *tmp;
380 int auth_failover = 0, acct_failover = 0;
381 char abuf[50];
382
383 entry = radius->msgs;
384 if (!entry)
385 return;
386
387 os_get_time(&now);
388 first = 0;
389
390 prev = NULL;
391 while (entry) {
392 if (now.sec >= entry->next_try &&
393 radius_client_retransmit(radius, entry, now.sec)) {
394 if (prev)
395 prev->next = entry->next;
396 else
397 radius->msgs = entry->next;
398
399 tmp = entry;
400 entry = entry->next;
401 radius_client_msg_free(tmp);
402 radius->num_msgs--;
403 continue;
404 }
405
406 if (entry->attempts > RADIUS_CLIENT_NUM_FAILOVER) {
407 if (entry->msg_type == RADIUS_ACCT ||
408 entry->msg_type == RADIUS_ACCT_INTERIM)
409 acct_failover++;
410 else
411 auth_failover++;
412 }
413
414 if (first == 0 || entry->next_try < first)
415 first = entry->next_try;
416
417 prev = entry;
418 entry = entry->next;
419 }
420
421 if (radius->msgs) {
422 if (first < now.sec)
423 first = now.sec;
424 eloop_register_timeout(first - now.sec, 0,
425 radius_client_timer, radius, NULL);
426 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
427 HOSTAPD_LEVEL_DEBUG, "Next RADIUS client "
428 "retransmit in %ld seconds",
429 (long int) (first - now.sec));
430 }
431
432 if (auth_failover && conf->num_auth_servers > 1) {
433 struct hostapd_radius_server *next, *old;
434 old = conf->auth_server;
435 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
436 HOSTAPD_LEVEL_NOTICE,
437 "No response from Authentication server "
438 "%s:%d - failover",
439 hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
440 old->port);
441
442 for (entry = radius->msgs; entry; entry = entry->next) {
443 if (entry->msg_type == RADIUS_AUTH)
444 old->timeouts++;
445 }
446
447 next = old + 1;
448 if (next > &(conf->auth_servers[conf->num_auth_servers - 1]))
449 next = conf->auth_servers;
450 conf->auth_server = next;
451 radius_change_server(radius, next, old,
452 radius->auth_serv_sock,
453 radius->auth_serv_sock6, 1);
454 }
455
456 if (acct_failover && conf->num_acct_servers > 1) {
457 struct hostapd_radius_server *next, *old;
458 old = conf->acct_server;
459 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
460 HOSTAPD_LEVEL_NOTICE,
461 "No response from Accounting server "
462 "%s:%d - failover",
463 hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
464 old->port);
465
466 for (entry = radius->msgs; entry; entry = entry->next) {
467 if (entry->msg_type == RADIUS_ACCT ||
468 entry->msg_type == RADIUS_ACCT_INTERIM)
469 old->timeouts++;
470 }
471
472 next = old + 1;
473 if (next > &conf->acct_servers[conf->num_acct_servers - 1])
474 next = conf->acct_servers;
475 conf->acct_server = next;
476 radius_change_server(radius, next, old,
477 radius->acct_serv_sock,
478 radius->acct_serv_sock6, 0);
479 }
480 }
481
482
radius_client_update_timeout(struct radius_client_data * radius)483 static void radius_client_update_timeout(struct radius_client_data *radius)
484 {
485 struct os_time now;
486 os_time_t first;
487 struct radius_msg_list *entry;
488
489 eloop_cancel_timeout(radius_client_timer, radius, NULL);
490
491 if (radius->msgs == NULL) {
492 return;
493 }
494
495 first = 0;
496 for (entry = radius->msgs; entry; entry = entry->next) {
497 if (first == 0 || entry->next_try < first)
498 first = entry->next_try;
499 }
500
501 os_get_time(&now);
502 if (first < now.sec)
503 first = now.sec;
504 eloop_register_timeout(first - now.sec, 0, radius_client_timer, radius,
505 NULL);
506 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
507 HOSTAPD_LEVEL_DEBUG, "Next RADIUS client retransmit in"
508 " %ld seconds", (long int) (first - now.sec));
509 }
510
511
radius_client_list_add(struct radius_client_data * radius,struct radius_msg * msg,RadiusType msg_type,const u8 * shared_secret,size_t shared_secret_len,const u8 * addr)512 static void radius_client_list_add(struct radius_client_data *radius,
513 struct radius_msg *msg,
514 RadiusType msg_type,
515 const u8 *shared_secret,
516 size_t shared_secret_len, const u8 *addr)
517 {
518 struct radius_msg_list *entry, *prev;
519
520 if (eloop_terminated()) {
521 /* No point in adding entries to retransmit queue since event
522 * loop has already been terminated. */
523 radius_msg_free(msg);
524 return;
525 }
526
527 entry = os_zalloc(sizeof(*entry));
528 if (entry == NULL) {
529 printf("Failed to add RADIUS packet into retransmit list\n");
530 radius_msg_free(msg);
531 return;
532 }
533
534 if (addr)
535 os_memcpy(entry->addr, addr, ETH_ALEN);
536 entry->msg = msg;
537 entry->msg_type = msg_type;
538 entry->shared_secret = shared_secret;
539 entry->shared_secret_len = shared_secret_len;
540 os_get_time(&entry->last_attempt);
541 entry->first_try = entry->last_attempt.sec;
542 entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
543 entry->attempts = 1;
544 entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
545 entry->next = radius->msgs;
546 radius->msgs = entry;
547 radius_client_update_timeout(radius);
548
549 if (radius->num_msgs >= RADIUS_CLIENT_MAX_ENTRIES) {
550 printf("Removing the oldest un-ACKed RADIUS packet due to "
551 "retransmit list limits.\n");
552 prev = NULL;
553 while (entry->next) {
554 prev = entry;
555 entry = entry->next;
556 }
557 if (prev) {
558 prev->next = NULL;
559 radius_client_msg_free(entry);
560 }
561 } else
562 radius->num_msgs++;
563 }
564
565
radius_client_list_del(struct radius_client_data * radius,RadiusType msg_type,const u8 * addr)566 static void radius_client_list_del(struct radius_client_data *radius,
567 RadiusType msg_type, const u8 *addr)
568 {
569 struct radius_msg_list *entry, *prev, *tmp;
570
571 if (addr == NULL)
572 return;
573
574 entry = radius->msgs;
575 prev = NULL;
576 while (entry) {
577 if (entry->msg_type == msg_type &&
578 os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
579 if (prev)
580 prev->next = entry->next;
581 else
582 radius->msgs = entry->next;
583 tmp = entry;
584 entry = entry->next;
585 hostapd_logger(radius->ctx, addr,
586 HOSTAPD_MODULE_RADIUS,
587 HOSTAPD_LEVEL_DEBUG,
588 "Removing matching RADIUS message");
589 radius_client_msg_free(tmp);
590 radius->num_msgs--;
591 continue;
592 }
593 prev = entry;
594 entry = entry->next;
595 }
596 }
597
598
599 /**
600 * radius_client_send - Send a RADIUS request
601 * @radius: RADIUS client context from radius_client_init()
602 * @msg: RADIUS message to be sent
603 * @msg_type: Message type (RADIUS_AUTH, RADIUS_ACCT, RADIUS_ACCT_INTERIM)
604 * @addr: MAC address of the device related to this message or %NULL
605 * Returns: 0 on success, -1 on failure
606 *
607 * This function is used to transmit a RADIUS authentication (RADIUS_AUTH) or
608 * accounting request (RADIUS_ACCT or RADIUS_ACCT_INTERIM). The only difference
609 * between accounting and interim accounting messages is that the interim
610 * message will override any pending interim accounting updates while a new
611 * accounting message does not remove any pending messages.
612 *
613 * The message is added on the retransmission queue and will be retransmitted
614 * automatically until a response is received or maximum number of retries
615 * (RADIUS_CLIENT_MAX_RETRIES) is reached.
616 *
617 * The related device MAC address can be used to identify pending messages that
618 * can be removed with radius_client_flush_auth() or with interim accounting
619 * updates.
620 */
radius_client_send(struct radius_client_data * radius,struct radius_msg * msg,RadiusType msg_type,const u8 * addr)621 int radius_client_send(struct radius_client_data *radius,
622 struct radius_msg *msg, RadiusType msg_type,
623 const u8 *addr)
624 {
625 struct hostapd_radius_servers *conf = radius->conf;
626 const u8 *shared_secret;
627 size_t shared_secret_len;
628 char *name;
629 int s, res;
630 struct wpabuf *buf;
631
632 if (msg_type == RADIUS_ACCT_INTERIM) {
633 /* Remove any pending interim acct update for the same STA. */
634 radius_client_list_del(radius, msg_type, addr);
635 }
636
637 if (msg_type == RADIUS_ACCT || msg_type == RADIUS_ACCT_INTERIM) {
638 if (conf->acct_server == NULL) {
639 hostapd_logger(radius->ctx, NULL,
640 HOSTAPD_MODULE_RADIUS,
641 HOSTAPD_LEVEL_INFO,
642 "No accounting server configured");
643 return -1;
644 }
645 shared_secret = conf->acct_server->shared_secret;
646 shared_secret_len = conf->acct_server->shared_secret_len;
647 radius_msg_finish_acct(msg, shared_secret, shared_secret_len);
648 name = "accounting";
649 s = radius->acct_sock;
650 conf->acct_server->requests++;
651 } else {
652 if (conf->auth_server == NULL) {
653 hostapd_logger(radius->ctx, NULL,
654 HOSTAPD_MODULE_RADIUS,
655 HOSTAPD_LEVEL_INFO,
656 "No authentication server configured");
657 return -1;
658 }
659 shared_secret = conf->auth_server->shared_secret;
660 shared_secret_len = conf->auth_server->shared_secret_len;
661 radius_msg_finish(msg, shared_secret, shared_secret_len);
662 name = "authentication";
663 s = radius->auth_sock;
664 conf->auth_server->requests++;
665 }
666
667 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
668 HOSTAPD_LEVEL_DEBUG, "Sending RADIUS message to %s "
669 "server", name);
670 if (conf->msg_dumps)
671 radius_msg_dump(msg);
672
673 buf = radius_msg_get_buf(msg);
674 res = send(s, wpabuf_head(buf), wpabuf_len(buf), 0);
675 if (res < 0)
676 radius_client_handle_send_error(radius, s, msg_type);
677
678 radius_client_list_add(radius, msg, msg_type, shared_secret,
679 shared_secret_len, addr);
680
681 return 0;
682 }
683
684
radius_client_receive(int sock,void * eloop_ctx,void * sock_ctx)685 static void radius_client_receive(int sock, void *eloop_ctx, void *sock_ctx)
686 {
687 struct radius_client_data *radius = eloop_ctx;
688 struct hostapd_radius_servers *conf = radius->conf;
689 RadiusType msg_type = (RadiusType) sock_ctx;
690 int len, roundtrip;
691 unsigned char buf[3000];
692 struct radius_msg *msg;
693 struct radius_hdr *hdr;
694 struct radius_rx_handler *handlers;
695 size_t num_handlers, i;
696 struct radius_msg_list *req, *prev_req;
697 struct os_time now;
698 struct hostapd_radius_server *rconf;
699 int invalid_authenticator = 0;
700
701 if (msg_type == RADIUS_ACCT) {
702 handlers = radius->acct_handlers;
703 num_handlers = radius->num_acct_handlers;
704 rconf = conf->acct_server;
705 } else {
706 handlers = radius->auth_handlers;
707 num_handlers = radius->num_auth_handlers;
708 rconf = conf->auth_server;
709 }
710
711 len = recv(sock, buf, sizeof(buf), MSG_DONTWAIT);
712 if (len < 0) {
713 perror("recv[RADIUS]");
714 return;
715 }
716 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
717 HOSTAPD_LEVEL_DEBUG, "Received %d bytes from RADIUS "
718 "server", len);
719 if (len == sizeof(buf)) {
720 printf("Possibly too long UDP frame for our buffer - "
721 "dropping it\n");
722 return;
723 }
724
725 msg = radius_msg_parse(buf, len);
726 if (msg == NULL) {
727 printf("Parsing incoming RADIUS frame failed\n");
728 rconf->malformed_responses++;
729 return;
730 }
731 hdr = radius_msg_get_hdr(msg);
732
733 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
734 HOSTAPD_LEVEL_DEBUG, "Received RADIUS message");
735 if (conf->msg_dumps)
736 radius_msg_dump(msg);
737
738 switch (hdr->code) {
739 case RADIUS_CODE_ACCESS_ACCEPT:
740 rconf->access_accepts++;
741 break;
742 case RADIUS_CODE_ACCESS_REJECT:
743 rconf->access_rejects++;
744 break;
745 case RADIUS_CODE_ACCESS_CHALLENGE:
746 rconf->access_challenges++;
747 break;
748 case RADIUS_CODE_ACCOUNTING_RESPONSE:
749 rconf->responses++;
750 break;
751 }
752
753 prev_req = NULL;
754 req = radius->msgs;
755 while (req) {
756 /* TODO: also match by src addr:port of the packet when using
757 * alternative RADIUS servers (?) */
758 if ((req->msg_type == msg_type ||
759 (req->msg_type == RADIUS_ACCT_INTERIM &&
760 msg_type == RADIUS_ACCT)) &&
761 radius_msg_get_hdr(req->msg)->identifier ==
762 hdr->identifier)
763 break;
764
765 prev_req = req;
766 req = req->next;
767 }
768
769 if (req == NULL) {
770 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
771 HOSTAPD_LEVEL_DEBUG,
772 "No matching RADIUS request found (type=%d "
773 "id=%d) - dropping packet",
774 msg_type, hdr->identifier);
775 goto fail;
776 }
777
778 os_get_time(&now);
779 roundtrip = (now.sec - req->last_attempt.sec) * 100 +
780 (now.usec - req->last_attempt.usec) / 10000;
781 hostapd_logger(radius->ctx, req->addr, HOSTAPD_MODULE_RADIUS,
782 HOSTAPD_LEVEL_DEBUG,
783 "Received RADIUS packet matched with a pending "
784 "request, round trip time %d.%02d sec",
785 roundtrip / 100, roundtrip % 100);
786 rconf->round_trip_time = roundtrip;
787
788 /* Remove ACKed RADIUS packet from retransmit list */
789 if (prev_req)
790 prev_req->next = req->next;
791 else
792 radius->msgs = req->next;
793 radius->num_msgs--;
794
795 for (i = 0; i < num_handlers; i++) {
796 RadiusRxResult res;
797 res = handlers[i].handler(msg, req->msg, req->shared_secret,
798 req->shared_secret_len,
799 handlers[i].data);
800 switch (res) {
801 case RADIUS_RX_PROCESSED:
802 radius_msg_free(msg);
803 /* continue */
804 case RADIUS_RX_QUEUED:
805 radius_client_msg_free(req);
806 return;
807 case RADIUS_RX_INVALID_AUTHENTICATOR:
808 invalid_authenticator++;
809 /* continue */
810 case RADIUS_RX_UNKNOWN:
811 /* continue with next handler */
812 break;
813 }
814 }
815
816 if (invalid_authenticator)
817 rconf->bad_authenticators++;
818 else
819 rconf->unknown_types++;
820 hostapd_logger(radius->ctx, req->addr, HOSTAPD_MODULE_RADIUS,
821 HOSTAPD_LEVEL_DEBUG, "No RADIUS RX handler found "
822 "(type=%d code=%d id=%d)%s - dropping packet",
823 msg_type, hdr->code, hdr->identifier,
824 invalid_authenticator ? " [INVALID AUTHENTICATOR]" :
825 "");
826 radius_client_msg_free(req);
827
828 fail:
829 radius_msg_free(msg);
830 }
831
832
833 /**
834 * radius_client_get_id - Get an identifier for a new RADIUS message
835 * @radius: RADIUS client context from radius_client_init()
836 * Returns: Allocated identifier
837 *
838 * This function is used to fetch a unique (among pending requests) identifier
839 * for a new RADIUS message.
840 */
radius_client_get_id(struct radius_client_data * radius)841 u8 radius_client_get_id(struct radius_client_data *radius)
842 {
843 struct radius_msg_list *entry, *prev, *_remove;
844 u8 id = radius->next_radius_identifier++;
845
846 /* remove entries with matching id from retransmit list to avoid
847 * using new reply from the RADIUS server with an old request */
848 entry = radius->msgs;
849 prev = NULL;
850 while (entry) {
851 if (radius_msg_get_hdr(entry->msg)->identifier == id) {
852 hostapd_logger(radius->ctx, entry->addr,
853 HOSTAPD_MODULE_RADIUS,
854 HOSTAPD_LEVEL_DEBUG,
855 "Removing pending RADIUS message, "
856 "since its id (%d) is reused", id);
857 if (prev)
858 prev->next = entry->next;
859 else
860 radius->msgs = entry->next;
861 _remove = entry;
862 } else {
863 _remove = NULL;
864 prev = entry;
865 }
866 entry = entry->next;
867
868 if (_remove)
869 radius_client_msg_free(_remove);
870 }
871
872 return id;
873 }
874
875
876 /**
877 * radius_client_flush - Flush all pending RADIUS client messages
878 * @radius: RADIUS client context from radius_client_init()
879 * @only_auth: Whether only authentication messages are removed
880 */
radius_client_flush(struct radius_client_data * radius,int only_auth)881 void radius_client_flush(struct radius_client_data *radius, int only_auth)
882 {
883 struct radius_msg_list *entry, *prev, *tmp;
884
885 if (!radius)
886 return;
887
888 prev = NULL;
889 entry = radius->msgs;
890
891 while (entry) {
892 if (!only_auth || entry->msg_type == RADIUS_AUTH) {
893 if (prev)
894 prev->next = entry->next;
895 else
896 radius->msgs = entry->next;
897
898 tmp = entry;
899 entry = entry->next;
900 radius_client_msg_free(tmp);
901 radius->num_msgs--;
902 } else {
903 prev = entry;
904 entry = entry->next;
905 }
906 }
907
908 if (radius->msgs == NULL)
909 eloop_cancel_timeout(radius_client_timer, radius, NULL);
910 }
911
912
radius_client_update_acct_msgs(struct radius_client_data * radius,const u8 * shared_secret,size_t shared_secret_len)913 static void radius_client_update_acct_msgs(struct radius_client_data *radius,
914 const u8 *shared_secret,
915 size_t shared_secret_len)
916 {
917 struct radius_msg_list *entry;
918
919 if (!radius)
920 return;
921
922 for (entry = radius->msgs; entry; entry = entry->next) {
923 if (entry->msg_type == RADIUS_ACCT) {
924 entry->shared_secret = shared_secret;
925 entry->shared_secret_len = shared_secret_len;
926 radius_msg_finish_acct(entry->msg, shared_secret,
927 shared_secret_len);
928 }
929 }
930 }
931
932
933 static int
radius_change_server(struct radius_client_data * radius,struct hostapd_radius_server * nserv,struct hostapd_radius_server * oserv,int sock,int sock6,int auth)934 radius_change_server(struct radius_client_data *radius,
935 struct hostapd_radius_server *nserv,
936 struct hostapd_radius_server *oserv,
937 int sock, int sock6, int auth)
938 {
939 struct sockaddr_in serv, claddr;
940 #ifdef CONFIG_IPV6
941 struct sockaddr_in6 serv6, claddr6;
942 #endif /* CONFIG_IPV6 */
943 struct sockaddr *addr, *cl_addr;
944 socklen_t addrlen, claddrlen;
945 char abuf[50];
946 int sel_sock;
947 struct radius_msg_list *entry;
948 struct hostapd_radius_servers *conf = radius->conf;
949
950 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
951 HOSTAPD_LEVEL_INFO,
952 "%s server %s:%d",
953 auth ? "Authentication" : "Accounting",
954 hostapd_ip_txt(&nserv->addr, abuf, sizeof(abuf)),
955 nserv->port);
956
957 if (!oserv || nserv->shared_secret_len != oserv->shared_secret_len ||
958 os_memcmp(nserv->shared_secret, oserv->shared_secret,
959 nserv->shared_secret_len) != 0) {
960 /* Pending RADIUS packets used different shared secret, so
961 * they need to be modified. Update accounting message
962 * authenticators here. Authentication messages are removed
963 * since they would require more changes and the new RADIUS
964 * server may not be prepared to receive them anyway due to
965 * missing state information. Client will likely retry
966 * authentication, so this should not be an issue. */
967 if (auth)
968 radius_client_flush(radius, 1);
969 else {
970 radius_client_update_acct_msgs(
971 radius, nserv->shared_secret,
972 nserv->shared_secret_len);
973 }
974 }
975
976 /* Reset retry counters for the new server */
977 for (entry = radius->msgs; entry; entry = entry->next) {
978 if ((auth && entry->msg_type != RADIUS_AUTH) ||
979 (!auth && entry->msg_type != RADIUS_ACCT))
980 continue;
981 entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
982 entry->attempts = 0;
983 entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
984 }
985
986 if (radius->msgs) {
987 eloop_cancel_timeout(radius_client_timer, radius, NULL);
988 eloop_register_timeout(RADIUS_CLIENT_FIRST_WAIT, 0,
989 radius_client_timer, radius, NULL);
990 }
991
992 switch (nserv->addr.af) {
993 case AF_INET:
994 os_memset(&serv, 0, sizeof(serv));
995 serv.sin_family = AF_INET;
996 serv.sin_addr.s_addr = nserv->addr.u.v4.s_addr;
997 serv.sin_port = htons(nserv->port);
998 addr = (struct sockaddr *) &serv;
999 addrlen = sizeof(serv);
1000 sel_sock = sock;
1001 break;
1002 #ifdef CONFIG_IPV6
1003 case AF_INET6:
1004 os_memset(&serv6, 0, sizeof(serv6));
1005 serv6.sin6_family = AF_INET6;
1006 os_memcpy(&serv6.sin6_addr, &nserv->addr.u.v6,
1007 sizeof(struct in6_addr));
1008 serv6.sin6_port = htons(nserv->port);
1009 addr = (struct sockaddr *) &serv6;
1010 addrlen = sizeof(serv6);
1011 sel_sock = sock6;
1012 break;
1013 #endif /* CONFIG_IPV6 */
1014 default:
1015 return -1;
1016 }
1017
1018 if (conf->force_client_addr) {
1019 switch (conf->client_addr.af) {
1020 case AF_INET:
1021 os_memset(&claddr, 0, sizeof(claddr));
1022 claddr.sin_family = AF_INET;
1023 claddr.sin_addr.s_addr = conf->client_addr.u.v4.s_addr;
1024 claddr.sin_port = htons(0);
1025 cl_addr = (struct sockaddr *) &claddr;
1026 claddrlen = sizeof(claddr);
1027 break;
1028 #ifdef CONFIG_IPV6
1029 case AF_INET6:
1030 os_memset(&claddr6, 0, sizeof(claddr6));
1031 claddr6.sin6_family = AF_INET6;
1032 os_memcpy(&claddr6.sin6_addr, &conf->client_addr.u.v6,
1033 sizeof(struct in6_addr));
1034 claddr6.sin6_port = htons(0);
1035 cl_addr = (struct sockaddr *) &claddr6;
1036 claddrlen = sizeof(claddr6);
1037 break;
1038 #endif /* CONFIG_IPV6 */
1039 default:
1040 return -1;
1041 }
1042
1043 if (bind(sel_sock, cl_addr, claddrlen) < 0) {
1044 perror("bind[radius]");
1045 return -1;
1046 }
1047 }
1048
1049 if (connect(sel_sock, addr, addrlen) < 0) {
1050 perror("connect[radius]");
1051 return -1;
1052 }
1053
1054 #ifndef CONFIG_NATIVE_WINDOWS
1055 switch (nserv->addr.af) {
1056 case AF_INET:
1057 claddrlen = sizeof(claddr);
1058 getsockname(sel_sock, (struct sockaddr *) &claddr, &claddrlen);
1059 wpa_printf(MSG_DEBUG, "RADIUS local address: %s:%u",
1060 inet_ntoa(claddr.sin_addr), ntohs(claddr.sin_port));
1061 break;
1062 #ifdef CONFIG_IPV6
1063 case AF_INET6: {
1064 claddrlen = sizeof(claddr6);
1065 getsockname(sel_sock, (struct sockaddr *) &claddr6,
1066 &claddrlen);
1067 wpa_printf(MSG_DEBUG, "RADIUS local address: %s:%u",
1068 inet_ntop(AF_INET6, &claddr6.sin6_addr,
1069 abuf, sizeof(abuf)),
1070 ntohs(claddr6.sin6_port));
1071 break;
1072 }
1073 #endif /* CONFIG_IPV6 */
1074 }
1075 #endif /* CONFIG_NATIVE_WINDOWS */
1076
1077 if (auth)
1078 radius->auth_sock = sel_sock;
1079 else
1080 radius->acct_sock = sel_sock;
1081
1082 return 0;
1083 }
1084
1085
radius_retry_primary_timer(void * eloop_ctx,void * timeout_ctx)1086 static void radius_retry_primary_timer(void *eloop_ctx, void *timeout_ctx)
1087 {
1088 struct radius_client_data *radius = eloop_ctx;
1089 struct hostapd_radius_servers *conf = radius->conf;
1090 struct hostapd_radius_server *oserv;
1091
1092 if (radius->auth_sock >= 0 && conf->auth_servers &&
1093 conf->auth_server != conf->auth_servers) {
1094 oserv = conf->auth_server;
1095 conf->auth_server = conf->auth_servers;
1096 radius_change_server(radius, conf->auth_server, oserv,
1097 radius->auth_serv_sock,
1098 radius->auth_serv_sock6, 1);
1099 }
1100
1101 if (radius->acct_sock >= 0 && conf->acct_servers &&
1102 conf->acct_server != conf->acct_servers) {
1103 oserv = conf->acct_server;
1104 conf->acct_server = conf->acct_servers;
1105 radius_change_server(radius, conf->acct_server, oserv,
1106 radius->acct_serv_sock,
1107 radius->acct_serv_sock6, 0);
1108 }
1109
1110 if (conf->retry_primary_interval)
1111 eloop_register_timeout(conf->retry_primary_interval, 0,
1112 radius_retry_primary_timer, radius,
1113 NULL);
1114 }
1115
1116
radius_client_disable_pmtu_discovery(int s)1117 static int radius_client_disable_pmtu_discovery(int s)
1118 {
1119 int r = -1;
1120 #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
1121 /* Turn off Path MTU discovery on IPv4/UDP sockets. */
1122 int action = IP_PMTUDISC_DONT;
1123 r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
1124 sizeof(action));
1125 if (r == -1)
1126 wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: "
1127 "%s", strerror(errno));
1128 #endif
1129 return r;
1130 }
1131
1132
radius_client_init_auth(struct radius_client_data * radius)1133 static int radius_client_init_auth(struct radius_client_data *radius)
1134 {
1135 struct hostapd_radius_servers *conf = radius->conf;
1136 int ok = 0;
1137
1138 radius->auth_serv_sock = socket(PF_INET, SOCK_DGRAM, 0);
1139 if (radius->auth_serv_sock < 0)
1140 perror("socket[PF_INET,SOCK_DGRAM]");
1141 else {
1142 radius_client_disable_pmtu_discovery(radius->auth_serv_sock);
1143 ok++;
1144 }
1145
1146 #ifdef CONFIG_IPV6
1147 radius->auth_serv_sock6 = socket(PF_INET6, SOCK_DGRAM, 0);
1148 if (radius->auth_serv_sock6 < 0)
1149 perror("socket[PF_INET6,SOCK_DGRAM]");
1150 else
1151 ok++;
1152 #endif /* CONFIG_IPV6 */
1153
1154 if (ok == 0)
1155 return -1;
1156
1157 radius_change_server(radius, conf->auth_server, NULL,
1158 radius->auth_serv_sock, radius->auth_serv_sock6,
1159 1);
1160
1161 if (radius->auth_serv_sock >= 0 &&
1162 eloop_register_read_sock(radius->auth_serv_sock,
1163 radius_client_receive, radius,
1164 (void *) RADIUS_AUTH)) {
1165 printf("Could not register read socket for authentication "
1166 "server\n");
1167 return -1;
1168 }
1169
1170 #ifdef CONFIG_IPV6
1171 if (radius->auth_serv_sock6 >= 0 &&
1172 eloop_register_read_sock(radius->auth_serv_sock6,
1173 radius_client_receive, radius,
1174 (void *) RADIUS_AUTH)) {
1175 printf("Could not register read socket for authentication "
1176 "server\n");
1177 return -1;
1178 }
1179 #endif /* CONFIG_IPV6 */
1180
1181 return 0;
1182 }
1183
1184
radius_client_init_acct(struct radius_client_data * radius)1185 static int radius_client_init_acct(struct radius_client_data *radius)
1186 {
1187 struct hostapd_radius_servers *conf = radius->conf;
1188 int ok = 0;
1189
1190 radius->acct_serv_sock = socket(PF_INET, SOCK_DGRAM, 0);
1191 if (radius->acct_serv_sock < 0)
1192 perror("socket[PF_INET,SOCK_DGRAM]");
1193 else {
1194 radius_client_disable_pmtu_discovery(radius->acct_serv_sock);
1195 ok++;
1196 }
1197
1198 #ifdef CONFIG_IPV6
1199 radius->acct_serv_sock6 = socket(PF_INET6, SOCK_DGRAM, 0);
1200 if (radius->acct_serv_sock6 < 0)
1201 perror("socket[PF_INET6,SOCK_DGRAM]");
1202 else
1203 ok++;
1204 #endif /* CONFIG_IPV6 */
1205
1206 if (ok == 0)
1207 return -1;
1208
1209 radius_change_server(radius, conf->acct_server, NULL,
1210 radius->acct_serv_sock, radius->acct_serv_sock6,
1211 0);
1212
1213 if (radius->acct_serv_sock >= 0 &&
1214 eloop_register_read_sock(radius->acct_serv_sock,
1215 radius_client_receive, radius,
1216 (void *) RADIUS_ACCT)) {
1217 printf("Could not register read socket for accounting "
1218 "server\n");
1219 return -1;
1220 }
1221
1222 #ifdef CONFIG_IPV6
1223 if (radius->acct_serv_sock6 >= 0 &&
1224 eloop_register_read_sock(radius->acct_serv_sock6,
1225 radius_client_receive, radius,
1226 (void *) RADIUS_ACCT)) {
1227 printf("Could not register read socket for accounting "
1228 "server\n");
1229 return -1;
1230 }
1231 #endif /* CONFIG_IPV6 */
1232
1233 return 0;
1234 }
1235
1236
1237 /**
1238 * radius_client_init - Initialize RADIUS client
1239 * @ctx: Callback context to be used in hostapd_logger() calls
1240 * @conf: RADIUS client configuration (RADIUS servers)
1241 * Returns: Pointer to private RADIUS client context or %NULL on failure
1242 *
1243 * The caller is responsible for keeping the configuration data available for
1244 * the lifetime of the RADIUS client, i.e., until radius_client_deinit() is
1245 * called for the returned context pointer.
1246 */
1247 struct radius_client_data *
radius_client_init(void * ctx,struct hostapd_radius_servers * conf)1248 radius_client_init(void *ctx, struct hostapd_radius_servers *conf)
1249 {
1250 struct radius_client_data *radius;
1251
1252 radius = os_zalloc(sizeof(struct radius_client_data));
1253 if (radius == NULL)
1254 return NULL;
1255
1256 radius->ctx = ctx;
1257 radius->conf = conf;
1258 radius->auth_serv_sock = radius->acct_serv_sock =
1259 radius->auth_serv_sock6 = radius->acct_serv_sock6 =
1260 radius->auth_sock = radius->acct_sock = -1;
1261
1262 if (conf->auth_server && radius_client_init_auth(radius)) {
1263 radius_client_deinit(radius);
1264 return NULL;
1265 }
1266
1267 if (conf->acct_server && radius_client_init_acct(radius)) {
1268 radius_client_deinit(radius);
1269 return NULL;
1270 }
1271
1272 if (conf->retry_primary_interval)
1273 eloop_register_timeout(conf->retry_primary_interval, 0,
1274 radius_retry_primary_timer, radius,
1275 NULL);
1276
1277 return radius;
1278 }
1279
1280
1281 /**
1282 * radius_client_deinit - Deinitialize RADIUS client
1283 * @radius: RADIUS client context from radius_client_init()
1284 */
radius_client_deinit(struct radius_client_data * radius)1285 void radius_client_deinit(struct radius_client_data *radius)
1286 {
1287 if (!radius)
1288 return;
1289
1290 if (radius->auth_serv_sock >= 0)
1291 eloop_unregister_read_sock(radius->auth_serv_sock);
1292 if (radius->acct_serv_sock >= 0)
1293 eloop_unregister_read_sock(radius->acct_serv_sock);
1294 #ifdef CONFIG_IPV6
1295 if (radius->auth_serv_sock6 >= 0)
1296 eloop_unregister_read_sock(radius->auth_serv_sock6);
1297 if (radius->acct_serv_sock6 >= 0)
1298 eloop_unregister_read_sock(radius->acct_serv_sock6);
1299 #endif /* CONFIG_IPV6 */
1300
1301 eloop_cancel_timeout(radius_retry_primary_timer, radius, NULL);
1302
1303 radius_client_flush(radius, 0);
1304 os_free(radius->auth_handlers);
1305 os_free(radius->acct_handlers);
1306 os_free(radius);
1307 }
1308
1309
1310 /**
1311 * radius_client_flush_auth - Flush pending RADIUS messages for an address
1312 * @radius: RADIUS client context from radius_client_init()
1313 * @addr: MAC address of the related device
1314 *
1315 * This function can be used to remove pending RADIUS authentication messages
1316 * that are related to a specific device. The addr parameter is matched with
1317 * the one used in radius_client_send() call that was used to transmit the
1318 * authentication request.
1319 */
radius_client_flush_auth(struct radius_client_data * radius,const u8 * addr)1320 void radius_client_flush_auth(struct radius_client_data *radius,
1321 const u8 *addr)
1322 {
1323 struct radius_msg_list *entry, *prev, *tmp;
1324
1325 prev = NULL;
1326 entry = radius->msgs;
1327 while (entry) {
1328 if (entry->msg_type == RADIUS_AUTH &&
1329 os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
1330 hostapd_logger(radius->ctx, addr,
1331 HOSTAPD_MODULE_RADIUS,
1332 HOSTAPD_LEVEL_DEBUG,
1333 "Removing pending RADIUS authentication"
1334 " message for removed client");
1335
1336 if (prev)
1337 prev->next = entry->next;
1338 else
1339 radius->msgs = entry->next;
1340
1341 tmp = entry;
1342 entry = entry->next;
1343 radius_client_msg_free(tmp);
1344 radius->num_msgs--;
1345 continue;
1346 }
1347
1348 prev = entry;
1349 entry = entry->next;
1350 }
1351 }
1352
1353
radius_client_dump_auth_server(char * buf,size_t buflen,struct hostapd_radius_server * serv,struct radius_client_data * cli)1354 static int radius_client_dump_auth_server(char *buf, size_t buflen,
1355 struct hostapd_radius_server *serv,
1356 struct radius_client_data *cli)
1357 {
1358 int pending = 0;
1359 struct radius_msg_list *msg;
1360 char abuf[50];
1361
1362 if (cli) {
1363 for (msg = cli->msgs; msg; msg = msg->next) {
1364 if (msg->msg_type == RADIUS_AUTH)
1365 pending++;
1366 }
1367 }
1368
1369 return os_snprintf(buf, buflen,
1370 "radiusAuthServerIndex=%d\n"
1371 "radiusAuthServerAddress=%s\n"
1372 "radiusAuthClientServerPortNumber=%d\n"
1373 "radiusAuthClientRoundTripTime=%d\n"
1374 "radiusAuthClientAccessRequests=%u\n"
1375 "radiusAuthClientAccessRetransmissions=%u\n"
1376 "radiusAuthClientAccessAccepts=%u\n"
1377 "radiusAuthClientAccessRejects=%u\n"
1378 "radiusAuthClientAccessChallenges=%u\n"
1379 "radiusAuthClientMalformedAccessResponses=%u\n"
1380 "radiusAuthClientBadAuthenticators=%u\n"
1381 "radiusAuthClientPendingRequests=%u\n"
1382 "radiusAuthClientTimeouts=%u\n"
1383 "radiusAuthClientUnknownTypes=%u\n"
1384 "radiusAuthClientPacketsDropped=%u\n",
1385 serv->index,
1386 hostapd_ip_txt(&serv->addr, abuf, sizeof(abuf)),
1387 serv->port,
1388 serv->round_trip_time,
1389 serv->requests,
1390 serv->retransmissions,
1391 serv->access_accepts,
1392 serv->access_rejects,
1393 serv->access_challenges,
1394 serv->malformed_responses,
1395 serv->bad_authenticators,
1396 pending,
1397 serv->timeouts,
1398 serv->unknown_types,
1399 serv->packets_dropped);
1400 }
1401
1402
radius_client_dump_acct_server(char * buf,size_t buflen,struct hostapd_radius_server * serv,struct radius_client_data * cli)1403 static int radius_client_dump_acct_server(char *buf, size_t buflen,
1404 struct hostapd_radius_server *serv,
1405 struct radius_client_data *cli)
1406 {
1407 int pending = 0;
1408 struct radius_msg_list *msg;
1409 char abuf[50];
1410
1411 if (cli) {
1412 for (msg = cli->msgs; msg; msg = msg->next) {
1413 if (msg->msg_type == RADIUS_ACCT ||
1414 msg->msg_type == RADIUS_ACCT_INTERIM)
1415 pending++;
1416 }
1417 }
1418
1419 return os_snprintf(buf, buflen,
1420 "radiusAccServerIndex=%d\n"
1421 "radiusAccServerAddress=%s\n"
1422 "radiusAccClientServerPortNumber=%d\n"
1423 "radiusAccClientRoundTripTime=%d\n"
1424 "radiusAccClientRequests=%u\n"
1425 "radiusAccClientRetransmissions=%u\n"
1426 "radiusAccClientResponses=%u\n"
1427 "radiusAccClientMalformedResponses=%u\n"
1428 "radiusAccClientBadAuthenticators=%u\n"
1429 "radiusAccClientPendingRequests=%u\n"
1430 "radiusAccClientTimeouts=%u\n"
1431 "radiusAccClientUnknownTypes=%u\n"
1432 "radiusAccClientPacketsDropped=%u\n",
1433 serv->index,
1434 hostapd_ip_txt(&serv->addr, abuf, sizeof(abuf)),
1435 serv->port,
1436 serv->round_trip_time,
1437 serv->requests,
1438 serv->retransmissions,
1439 serv->responses,
1440 serv->malformed_responses,
1441 serv->bad_authenticators,
1442 pending,
1443 serv->timeouts,
1444 serv->unknown_types,
1445 serv->packets_dropped);
1446 }
1447
1448
1449 /**
1450 * radius_client_get_mib - Get RADIUS client MIB information
1451 * @radius: RADIUS client context from radius_client_init()
1452 * @buf: Buffer for returning MIB data in text format
1453 * @buflen: Maximum buf length in octets
1454 * Returns: Number of octets written into the buffer
1455 */
radius_client_get_mib(struct radius_client_data * radius,char * buf,size_t buflen)1456 int radius_client_get_mib(struct radius_client_data *radius, char *buf,
1457 size_t buflen)
1458 {
1459 struct hostapd_radius_servers *conf = radius->conf;
1460 int i;
1461 struct hostapd_radius_server *serv;
1462 int count = 0;
1463
1464 if (conf->auth_servers) {
1465 for (i = 0; i < conf->num_auth_servers; i++) {
1466 serv = &conf->auth_servers[i];
1467 count += radius_client_dump_auth_server(
1468 buf + count, buflen - count, serv,
1469 serv == conf->auth_server ?
1470 radius : NULL);
1471 }
1472 }
1473
1474 if (conf->acct_servers) {
1475 for (i = 0; i < conf->num_acct_servers; i++) {
1476 serv = &conf->acct_servers[i];
1477 count += radius_client_dump_acct_server(
1478 buf + count, buflen - count, serv,
1479 serv == conf->acct_server ?
1480 radius : NULL);
1481 }
1482 }
1483
1484 return count;
1485 }
1486
1487
radius_client_reconfig(struct radius_client_data * radius,struct hostapd_radius_servers * conf)1488 void radius_client_reconfig(struct radius_client_data *radius,
1489 struct hostapd_radius_servers *conf)
1490 {
1491 if (radius)
1492 radius->conf = conf;
1493 }
1494