Line data Source code
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_reltime 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 :
241 2249 : static void radius_client_msg_free(struct radius_msg_list *req)
242 : {
243 2249 : radius_msg_free(req->msg);
244 2249 : os_free(req);
245 2249 : }
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 : */
264 1899 : 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 1899 : if (msg_type == RADIUS_ACCT) {
277 633 : handlers = &radius->acct_handlers;
278 633 : num = &radius->num_acct_handlers;
279 : } else {
280 1266 : handlers = &radius->auth_handlers;
281 1266 : num = &radius->num_auth_handlers;
282 : }
283 :
284 1899 : newh = os_realloc_array(*handlers, *num + 1,
285 : sizeof(struct radius_rx_handler));
286 1899 : if (newh == NULL)
287 0 : return -1;
288 :
289 1899 : newh[*num].handler = handler;
290 1899 : newh[*num].data = data;
291 1899 : (*num)++;
292 1899 : *handlers = newh;
293 :
294 1899 : return 0;
295 : }
296 :
297 :
298 : /*
299 : * Returns >0 if message queue was flushed (i.e., the message that triggered
300 : * the error is not available anymore)
301 : */
302 892 : static int radius_client_handle_send_error(struct radius_client_data *radius,
303 : int s, RadiusType msg_type)
304 : {
305 : #ifndef CONFIG_NATIVE_WINDOWS
306 892 : int _errno = errno;
307 892 : wpa_printf(MSG_INFO, "send[RADIUS]: %s", strerror(errno));
308 892 : if (_errno == ENOTCONN || _errno == EDESTADDRREQ || _errno == EINVAL ||
309 5 : _errno == EBADF || _errno == ENETUNREACH) {
310 891 : hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
311 : HOSTAPD_LEVEL_INFO,
312 : "Send failed - maybe interface status changed -"
313 : " try to connect again");
314 891 : if (msg_type == RADIUS_ACCT ||
315 : msg_type == RADIUS_ACCT_INTERIM) {
316 4 : radius_client_init_acct(radius);
317 4 : return 0;
318 : } else {
319 887 : radius_client_init_auth(radius);
320 887 : return 1;
321 : }
322 : }
323 : #endif /* CONFIG_NATIVE_WINDOWS */
324 :
325 1 : return 0;
326 : }
327 :
328 :
329 894 : static int radius_client_retransmit(struct radius_client_data *radius,
330 : struct radius_msg_list *entry,
331 : os_time_t now)
332 : {
333 894 : struct hostapd_radius_servers *conf = radius->conf;
334 : int s;
335 : struct wpabuf *buf;
336 :
337 1780 : if (entry->msg_type == RADIUS_ACCT ||
338 886 : entry->msg_type == RADIUS_ACCT_INTERIM) {
339 8 : s = radius->acct_sock;
340 16 : if (entry->attempts == 0)
341 1 : conf->acct_server->requests++;
342 : else {
343 7 : conf->acct_server->timeouts++;
344 7 : conf->acct_server->retransmissions++;
345 : }
346 : } else {
347 886 : s = radius->auth_sock;
348 886 : if (entry->attempts == 0)
349 0 : conf->auth_server->requests++;
350 : else {
351 886 : conf->auth_server->timeouts++;
352 886 : conf->auth_server->retransmissions++;
353 : }
354 : }
355 :
356 : /* retransmit; remove entry if too many attempts */
357 894 : entry->attempts++;
358 894 : hostapd_logger(radius->ctx, entry->addr, HOSTAPD_MODULE_RADIUS,
359 : HOSTAPD_LEVEL_DEBUG, "Resending RADIUS message (id=%d)",
360 894 : radius_msg_get_hdr(entry->msg)->identifier);
361 :
362 894 : os_get_reltime(&entry->last_attempt);
363 894 : buf = radius_msg_get_buf(entry->msg);
364 894 : if (send(s, wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
365 889 : if (radius_client_handle_send_error(radius, s, entry->msg_type)
366 : > 0)
367 885 : return 0;
368 : }
369 :
370 9 : entry->next_try = now + entry->next_wait;
371 9 : entry->next_wait *= 2;
372 9 : if (entry->next_wait > RADIUS_CLIENT_MAX_WAIT)
373 0 : entry->next_wait = RADIUS_CLIENT_MAX_WAIT;
374 9 : if (entry->attempts >= RADIUS_CLIENT_MAX_RETRIES) {
375 0 : wpa_printf(MSG_INFO, "RADIUS: Removing un-ACKed message due to too many failed retransmit attempts");
376 0 : return 1;
377 : }
378 :
379 9 : return 0;
380 : }
381 :
382 :
383 904 : static void radius_client_timer(void *eloop_ctx, void *timeout_ctx)
384 : {
385 904 : struct radius_client_data *radius = eloop_ctx;
386 904 : struct hostapd_radius_servers *conf = radius->conf;
387 : struct os_reltime now;
388 : os_time_t first;
389 : struct radius_msg_list *entry, *prev, *tmp;
390 904 : int auth_failover = 0, acct_failover = 0;
391 : char abuf[50];
392 : size_t prev_num_msgs;
393 : int s;
394 :
395 904 : entry = radius->msgs;
396 904 : if (!entry)
397 916 : return;
398 :
399 892 : os_get_reltime(&now);
400 892 : first = 0;
401 :
402 892 : prev = NULL;
403 2683 : while (entry) {
404 899 : prev_num_msgs = radius->num_msgs;
405 1793 : if (now.sec >= entry->next_try &&
406 894 : radius_client_retransmit(radius, entry, now.sec)) {
407 0 : if (prev)
408 0 : prev->next = entry->next;
409 : else
410 0 : radius->msgs = entry->next;
411 :
412 0 : tmp = entry;
413 0 : entry = entry->next;
414 0 : radius_client_msg_free(tmp);
415 0 : radius->num_msgs--;
416 0 : continue;
417 : }
418 :
419 899 : if (prev_num_msgs != radius->num_msgs) {
420 0 : wpa_printf(MSG_DEBUG,
421 : "RADIUS: Message removed from queue - restart from beginning");
422 0 : entry = radius->msgs;
423 0 : prev = NULL;
424 0 : continue;
425 : }
426 :
427 899 : s = entry->msg_type == RADIUS_AUTH ? radius->auth_sock :
428 : radius->acct_sock;
429 899 : if (entry->attempts > RADIUS_CLIENT_NUM_FAILOVER ||
430 9 : (s < 0 && entry->attempts > 0)) {
431 1775 : if (entry->msg_type == RADIUS_ACCT ||
432 885 : entry->msg_type == RADIUS_ACCT_INTERIM)
433 5 : acct_failover++;
434 : else
435 885 : auth_failover++;
436 : }
437 :
438 899 : if (first == 0 || entry->next_try < first)
439 894 : first = entry->next_try;
440 :
441 899 : prev = entry;
442 899 : entry = entry->next;
443 : }
444 :
445 892 : if (radius->msgs) {
446 892 : if (first < now.sec)
447 329 : first = now.sec;
448 892 : eloop_register_timeout(first - now.sec, 0,
449 : radius_client_timer, radius, NULL);
450 892 : hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
451 : HOSTAPD_LEVEL_DEBUG, "Next RADIUS client "
452 : "retransmit in %ld seconds",
453 892 : (long int) (first - now.sec));
454 : }
455 :
456 892 : if (auth_failover && conf->num_auth_servers > 1) {
457 : struct hostapd_radius_server *next, *old;
458 1 : old = conf->auth_server;
459 2 : hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
460 : HOSTAPD_LEVEL_NOTICE,
461 : "No response from Authentication server "
462 : "%s:%d - failover",
463 1 : hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
464 : old->port);
465 :
466 3 : for (entry = radius->msgs; entry; entry = entry->next) {
467 2 : if (entry->msg_type == RADIUS_AUTH)
468 1 : old->timeouts++;
469 : }
470 :
471 1 : next = old + 1;
472 1 : if (next > &(conf->auth_servers[conf->num_auth_servers - 1]))
473 0 : next = conf->auth_servers;
474 1 : conf->auth_server = next;
475 1 : radius_change_server(radius, next, old,
476 : radius->auth_serv_sock,
477 : radius->auth_serv_sock6, 1);
478 : }
479 :
480 892 : if (acct_failover && conf->num_acct_servers > 1) {
481 : struct hostapd_radius_server *next, *old;
482 1 : old = conf->acct_server;
483 2 : hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
484 : HOSTAPD_LEVEL_NOTICE,
485 : "No response from Accounting server "
486 : "%s:%d - failover",
487 1 : hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
488 : old->port);
489 :
490 2 : for (entry = radius->msgs; entry; entry = entry->next) {
491 1 : if (entry->msg_type == RADIUS_ACCT ||
492 0 : entry->msg_type == RADIUS_ACCT_INTERIM)
493 1 : old->timeouts++;
494 : }
495 :
496 1 : next = old + 1;
497 1 : if (next > &conf->acct_servers[conf->num_acct_servers - 1])
498 0 : next = conf->acct_servers;
499 1 : conf->acct_server = next;
500 1 : radius_change_server(radius, next, old,
501 : radius->acct_serv_sock,
502 : radius->acct_serv_sock6, 0);
503 : }
504 : }
505 :
506 :
507 2249 : static void radius_client_update_timeout(struct radius_client_data *radius)
508 : {
509 : struct os_reltime now;
510 : os_time_t first;
511 : struct radius_msg_list *entry;
512 :
513 2249 : eloop_cancel_timeout(radius_client_timer, radius, NULL);
514 :
515 2249 : if (radius->msgs == NULL) {
516 2249 : return;
517 : }
518 :
519 2249 : first = 0;
520 4535 : for (entry = radius->msgs; entry; entry = entry->next) {
521 2286 : if (first == 0 || entry->next_try < first)
522 2259 : first = entry->next_try;
523 : }
524 :
525 2249 : os_get_reltime(&now);
526 2249 : if (first < now.sec)
527 0 : first = now.sec;
528 2249 : eloop_register_timeout(first - now.sec, 0, radius_client_timer, radius,
529 : NULL);
530 2249 : hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
531 : HOSTAPD_LEVEL_DEBUG, "Next RADIUS client retransmit in"
532 2249 : " %ld seconds", (long int) (first - now.sec));
533 : }
534 :
535 :
536 2249 : static void radius_client_list_add(struct radius_client_data *radius,
537 : struct radius_msg *msg,
538 : RadiusType msg_type,
539 : const u8 *shared_secret,
540 : size_t shared_secret_len, const u8 *addr)
541 : {
542 : struct radius_msg_list *entry, *prev;
543 :
544 2249 : if (eloop_terminated()) {
545 : /* No point in adding entries to retransmit queue since event
546 : * loop has already been terminated. */
547 0 : radius_msg_free(msg);
548 0 : return;
549 : }
550 :
551 2249 : entry = os_zalloc(sizeof(*entry));
552 2249 : if (entry == NULL) {
553 0 : wpa_printf(MSG_INFO, "RADIUS: Failed to add packet into retransmit list");
554 0 : radius_msg_free(msg);
555 0 : return;
556 : }
557 :
558 2249 : if (addr)
559 2234 : os_memcpy(entry->addr, addr, ETH_ALEN);
560 2249 : entry->msg = msg;
561 2249 : entry->msg_type = msg_type;
562 2249 : entry->shared_secret = shared_secret;
563 2249 : entry->shared_secret_len = shared_secret_len;
564 2249 : os_get_reltime(&entry->last_attempt);
565 2249 : entry->first_try = entry->last_attempt.sec;
566 2249 : entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
567 2249 : entry->attempts = 1;
568 2249 : entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
569 2249 : entry->next = radius->msgs;
570 2249 : radius->msgs = entry;
571 2249 : radius_client_update_timeout(radius);
572 :
573 2249 : if (radius->num_msgs >= RADIUS_CLIENT_MAX_ENTRIES) {
574 0 : wpa_printf(MSG_INFO, "RADIUS: Removing the oldest un-ACKed packet due to retransmit list limits");
575 0 : prev = NULL;
576 0 : while (entry->next) {
577 0 : prev = entry;
578 0 : entry = entry->next;
579 : }
580 0 : if (prev) {
581 0 : prev->next = NULL;
582 0 : radius_client_msg_free(entry);
583 : }
584 : } else
585 2249 : radius->num_msgs++;
586 : }
587 :
588 :
589 6 : static void radius_client_list_del(struct radius_client_data *radius,
590 : RadiusType msg_type, const u8 *addr)
591 : {
592 : struct radius_msg_list *entry, *prev, *tmp;
593 :
594 6 : if (addr == NULL)
595 6 : return;
596 :
597 6 : entry = radius->msgs;
598 6 : prev = NULL;
599 20 : while (entry) {
600 10 : if (entry->msg_type == msg_type &&
601 2 : os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
602 2 : if (prev)
603 0 : prev->next = entry->next;
604 : else
605 2 : radius->msgs = entry->next;
606 2 : tmp = entry;
607 2 : entry = entry->next;
608 2 : hostapd_logger(radius->ctx, addr,
609 : HOSTAPD_MODULE_RADIUS,
610 : HOSTAPD_LEVEL_DEBUG,
611 : "Removing matching RADIUS message");
612 2 : radius_client_msg_free(tmp);
613 2 : radius->num_msgs--;
614 2 : continue;
615 : }
616 6 : prev = entry;
617 6 : entry = entry->next;
618 : }
619 : }
620 :
621 :
622 : /**
623 : * radius_client_send - Send a RADIUS request
624 : * @radius: RADIUS client context from radius_client_init()
625 : * @msg: RADIUS message to be sent
626 : * @msg_type: Message type (RADIUS_AUTH, RADIUS_ACCT, RADIUS_ACCT_INTERIM)
627 : * @addr: MAC address of the device related to this message or %NULL
628 : * Returns: 0 on success, -1 on failure
629 : *
630 : * This function is used to transmit a RADIUS authentication (RADIUS_AUTH) or
631 : * accounting request (RADIUS_ACCT or RADIUS_ACCT_INTERIM). The only difference
632 : * between accounting and interim accounting messages is that the interim
633 : * message will override any pending interim accounting updates while a new
634 : * accounting message does not remove any pending messages.
635 : *
636 : * The message is added on the retransmission queue and will be retransmitted
637 : * automatically until a response is received or maximum number of retries
638 : * (RADIUS_CLIENT_MAX_RETRIES) is reached.
639 : *
640 : * The related device MAC address can be used to identify pending messages that
641 : * can be removed with radius_client_flush_auth() or with interim accounting
642 : * updates.
643 : */
644 2252 : int radius_client_send(struct radius_client_data *radius,
645 : struct radius_msg *msg, RadiusType msg_type,
646 : const u8 *addr)
647 : {
648 2252 : struct hostapd_radius_servers *conf = radius->conf;
649 : const u8 *shared_secret;
650 : size_t shared_secret_len;
651 : char *name;
652 : int s, res;
653 : struct wpabuf *buf;
654 :
655 2252 : if (msg_type == RADIUS_ACCT_INTERIM) {
656 : /* Remove any pending interim acct update for the same STA. */
657 6 : radius_client_list_del(radius, msg_type, addr);
658 : }
659 :
660 2252 : if (msg_type == RADIUS_ACCT || msg_type == RADIUS_ACCT_INTERIM) {
661 45 : if (conf->acct_server == NULL || radius->acct_sock < 0) {
662 3 : hostapd_logger(radius->ctx, NULL,
663 : HOSTAPD_MODULE_RADIUS,
664 : HOSTAPD_LEVEL_INFO,
665 : "No accounting server configured");
666 3 : return -1;
667 : }
668 42 : shared_secret = conf->acct_server->shared_secret;
669 42 : shared_secret_len = conf->acct_server->shared_secret_len;
670 42 : radius_msg_finish_acct(msg, shared_secret, shared_secret_len);
671 42 : name = "accounting";
672 42 : s = radius->acct_sock;
673 42 : conf->acct_server->requests++;
674 : } else {
675 2207 : if (conf->auth_server == NULL || radius->auth_sock < 0) {
676 0 : hostapd_logger(radius->ctx, NULL,
677 : HOSTAPD_MODULE_RADIUS,
678 : HOSTAPD_LEVEL_INFO,
679 : "No authentication server configured");
680 0 : return -1;
681 : }
682 2207 : shared_secret = conf->auth_server->shared_secret;
683 2207 : shared_secret_len = conf->auth_server->shared_secret_len;
684 2207 : radius_msg_finish(msg, shared_secret, shared_secret_len);
685 2207 : name = "authentication";
686 2207 : s = radius->auth_sock;
687 2207 : conf->auth_server->requests++;
688 : }
689 :
690 2249 : hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
691 : HOSTAPD_LEVEL_DEBUG, "Sending RADIUS message to %s "
692 : "server", name);
693 2249 : if (conf->msg_dumps)
694 2249 : radius_msg_dump(msg);
695 :
696 2249 : buf = radius_msg_get_buf(msg);
697 2249 : res = send(s, wpabuf_head(buf), wpabuf_len(buf), 0);
698 2249 : if (res < 0)
699 3 : radius_client_handle_send_error(radius, s, msg_type);
700 :
701 2249 : radius_client_list_add(radius, msg, msg_type, shared_secret,
702 : shared_secret_len, addr);
703 :
704 2249 : return 0;
705 : }
706 :
707 :
708 2240 : static void radius_client_receive(int sock, void *eloop_ctx, void *sock_ctx)
709 : {
710 2240 : struct radius_client_data *radius = eloop_ctx;
711 2240 : struct hostapd_radius_servers *conf = radius->conf;
712 2240 : RadiusType msg_type = (RadiusType) sock_ctx;
713 : int len, roundtrip;
714 : unsigned char buf[3000];
715 : struct radius_msg *msg;
716 : struct radius_hdr *hdr;
717 : struct radius_rx_handler *handlers;
718 : size_t num_handlers, i;
719 : struct radius_msg_list *req, *prev_req;
720 : struct os_reltime now;
721 : struct hostapd_radius_server *rconf;
722 2240 : int invalid_authenticator = 0;
723 :
724 2240 : if (msg_type == RADIUS_ACCT) {
725 35 : handlers = radius->acct_handlers;
726 35 : num_handlers = radius->num_acct_handlers;
727 35 : rconf = conf->acct_server;
728 : } else {
729 2205 : handlers = radius->auth_handlers;
730 2205 : num_handlers = radius->num_auth_handlers;
731 2205 : rconf = conf->auth_server;
732 : }
733 :
734 2240 : len = recv(sock, buf, sizeof(buf), MSG_DONTWAIT);
735 2240 : if (len < 0) {
736 14 : wpa_printf(MSG_INFO, "recv[RADIUS]: %s", strerror(errno));
737 14 : return;
738 : }
739 2226 : hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
740 : HOSTAPD_LEVEL_DEBUG, "Received %d bytes from RADIUS "
741 : "server", len);
742 2226 : if (len == sizeof(buf)) {
743 0 : wpa_printf(MSG_INFO, "RADIUS: Possibly too long UDP frame for our buffer - dropping it");
744 0 : return;
745 : }
746 :
747 2226 : msg = radius_msg_parse(buf, len);
748 2226 : if (msg == NULL) {
749 0 : wpa_printf(MSG_INFO, "RADIUS: Parsing incoming frame failed");
750 0 : rconf->malformed_responses++;
751 0 : return;
752 : }
753 2226 : hdr = radius_msg_get_hdr(msg);
754 :
755 2226 : hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
756 : HOSTAPD_LEVEL_DEBUG, "Received RADIUS message");
757 2226 : if (conf->msg_dumps)
758 2226 : radius_msg_dump(msg);
759 :
760 2226 : switch (hdr->code) {
761 : case RADIUS_CODE_ACCESS_ACCEPT:
762 287 : rconf->access_accepts++;
763 287 : break;
764 : case RADIUS_CODE_ACCESS_REJECT:
765 77 : rconf->access_rejects++;
766 77 : break;
767 : case RADIUS_CODE_ACCESS_CHALLENGE:
768 1838 : rconf->access_challenges++;
769 1838 : break;
770 : case RADIUS_CODE_ACCOUNTING_RESPONSE:
771 24 : rconf->responses++;
772 24 : break;
773 : }
774 :
775 2226 : prev_req = NULL;
776 2226 : req = radius->msgs;
777 4457 : while (req) {
778 : /* TODO: also match by src addr:port of the packet when using
779 : * alternative RADIUS servers (?) */
780 2230 : if ((req->msg_type == msg_type ||
781 6 : (req->msg_type == RADIUS_ACCT_INTERIM &&
782 2227 : msg_type == RADIUS_ACCT)) &&
783 2227 : radius_msg_get_hdr(req->msg)->identifier ==
784 2227 : hdr->identifier)
785 2222 : break;
786 :
787 5 : prev_req = req;
788 5 : req = req->next;
789 : }
790 :
791 2226 : if (req == NULL) {
792 4 : hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
793 : HOSTAPD_LEVEL_DEBUG,
794 : "No matching RADIUS request found (type=%d "
795 : "id=%d) - dropping packet",
796 4 : msg_type, hdr->identifier);
797 4 : goto fail;
798 : }
799 :
800 2222 : os_get_reltime(&now);
801 4444 : roundtrip = (now.sec - req->last_attempt.sec) * 100 +
802 2222 : (now.usec - req->last_attempt.usec) / 10000;
803 2222 : hostapd_logger(radius->ctx, req->addr, HOSTAPD_MODULE_RADIUS,
804 : HOSTAPD_LEVEL_DEBUG,
805 : "Received RADIUS packet matched with a pending "
806 : "request, round trip time %d.%02d sec",
807 : roundtrip / 100, roundtrip % 100);
808 2222 : rconf->round_trip_time = roundtrip;
809 :
810 : /* Remove ACKed RADIUS packet from retransmit list */
811 2222 : if (prev_req)
812 5 : prev_req->next = req->next;
813 : else
814 2217 : radius->msgs = req->next;
815 2222 : radius->num_msgs--;
816 :
817 4422 : for (i = 0; i < num_handlers; i++) {
818 : RadiusRxResult res;
819 8838 : res = handlers[i].handler(msg, req->msg, req->shared_secret,
820 : req->shared_secret_len,
821 4419 : handlers[i].data);
822 4419 : switch (res) {
823 : case RADIUS_RX_PROCESSED:
824 25 : radius_msg_free(msg);
825 : /* continue */
826 : case RADIUS_RX_QUEUED:
827 2219 : radius_client_msg_free(req);
828 2219 : return;
829 : case RADIUS_RX_INVALID_AUTHENTICATOR:
830 3 : invalid_authenticator++;
831 : /* continue */
832 : case RADIUS_RX_UNKNOWN:
833 : /* continue with next handler */
834 2200 : break;
835 : }
836 : }
837 :
838 3 : if (invalid_authenticator)
839 3 : rconf->bad_authenticators++;
840 : else
841 0 : rconf->unknown_types++;
842 9 : hostapd_logger(radius->ctx, req->addr, HOSTAPD_MODULE_RADIUS,
843 : HOSTAPD_LEVEL_DEBUG, "No RADIUS RX handler found "
844 : "(type=%d code=%d id=%d)%s - dropping packet",
845 6 : msg_type, hdr->code, hdr->identifier,
846 : invalid_authenticator ? " [INVALID AUTHENTICATOR]" :
847 : "");
848 3 : radius_client_msg_free(req);
849 :
850 : fail:
851 7 : radius_msg_free(msg);
852 : }
853 :
854 :
855 : /**
856 : * radius_client_get_id - Get an identifier for a new RADIUS message
857 : * @radius: RADIUS client context from radius_client_init()
858 : * Returns: Allocated identifier
859 : *
860 : * This function is used to fetch a unique (among pending requests) identifier
861 : * for a new RADIUS message.
862 : */
863 2252 : u8 radius_client_get_id(struct radius_client_data *radius)
864 : {
865 : struct radius_msg_list *entry, *prev, *_remove;
866 2252 : u8 id = radius->next_radius_identifier++;
867 :
868 : /* remove entries with matching id from retransmit list to avoid
869 : * using new reply from the RADIUS server with an old request */
870 2252 : entry = radius->msgs;
871 2252 : prev = NULL;
872 4547 : while (entry) {
873 43 : if (radius_msg_get_hdr(entry->msg)->identifier == id) {
874 0 : hostapd_logger(radius->ctx, entry->addr,
875 : HOSTAPD_MODULE_RADIUS,
876 : HOSTAPD_LEVEL_DEBUG,
877 : "Removing pending RADIUS message, "
878 : "since its id (%d) is reused", id);
879 0 : if (prev)
880 0 : prev->next = entry->next;
881 : else
882 0 : radius->msgs = entry->next;
883 0 : _remove = entry;
884 : } else {
885 43 : _remove = NULL;
886 43 : prev = entry;
887 : }
888 43 : entry = entry->next;
889 :
890 43 : if (_remove)
891 0 : radius_client_msg_free(_remove);
892 : }
893 :
894 2252 : return id;
895 : }
896 :
897 :
898 : /**
899 : * radius_client_flush - Flush all pending RADIUS client messages
900 : * @radius: RADIUS client context from radius_client_init()
901 : * @only_auth: Whether only authentication messages are removed
902 : */
903 652 : void radius_client_flush(struct radius_client_data *radius, int only_auth)
904 : {
905 : struct radius_msg_list *entry, *prev, *tmp;
906 :
907 652 : if (!radius)
908 652 : return;
909 :
910 652 : prev = NULL;
911 652 : entry = radius->msgs;
912 :
913 1322 : while (entry) {
914 18 : if (!only_auth || entry->msg_type == RADIUS_AUTH) {
915 17 : if (prev)
916 0 : prev->next = entry->next;
917 : else
918 17 : radius->msgs = entry->next;
919 :
920 17 : tmp = entry;
921 17 : entry = entry->next;
922 17 : radius_client_msg_free(tmp);
923 17 : radius->num_msgs--;
924 : } else {
925 1 : prev = entry;
926 1 : entry = entry->next;
927 : }
928 : }
929 :
930 652 : if (radius->msgs == NULL)
931 651 : eloop_cancel_timeout(radius_client_timer, radius, NULL);
932 : }
933 :
934 :
935 1 : static void radius_client_update_acct_msgs(struct radius_client_data *radius,
936 : const u8 *shared_secret,
937 : size_t shared_secret_len)
938 : {
939 : struct radius_msg_list *entry;
940 :
941 1 : if (!radius)
942 1 : return;
943 :
944 2 : for (entry = radius->msgs; entry; entry = entry->next) {
945 1 : if (entry->msg_type == RADIUS_ACCT) {
946 1 : entry->shared_secret = shared_secret;
947 1 : entry->shared_secret_len = shared_secret_len;
948 1 : radius_msg_finish_acct(entry->msg, shared_secret,
949 : shared_secret_len);
950 : }
951 : }
952 : }
953 :
954 :
955 : static int
956 1132 : radius_change_server(struct radius_client_data *radius,
957 : struct hostapd_radius_server *nserv,
958 : struct hostapd_radius_server *oserv,
959 : int sock, int sock6, int auth)
960 : {
961 : struct sockaddr_in serv, claddr;
962 : #ifdef CONFIG_IPV6
963 : struct sockaddr_in6 serv6, claddr6;
964 : #endif /* CONFIG_IPV6 */
965 : struct sockaddr *addr, *cl_addr;
966 : socklen_t addrlen, claddrlen;
967 : char abuf[50];
968 : int sel_sock;
969 : struct radius_msg_list *entry;
970 1132 : struct hostapd_radius_servers *conf = radius->conf;
971 :
972 2264 : hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
973 : HOSTAPD_LEVEL_INFO,
974 : "%s server %s:%d",
975 : auth ? "Authentication" : "Accounting",
976 1132 : hostapd_ip_txt(&nserv->addr, abuf, sizeof(abuf)),
977 : nserv->port);
978 :
979 1134 : if (oserv && oserv != nserv &&
980 2 : (nserv->shared_secret_len != oserv->shared_secret_len ||
981 0 : os_memcmp(nserv->shared_secret, oserv->shared_secret,
982 : nserv->shared_secret_len) != 0)) {
983 : /* Pending RADIUS packets used different shared secret, so
984 : * they need to be modified. Update accounting message
985 : * authenticators here. Authentication messages are removed
986 : * since they would require more changes and the new RADIUS
987 : * server may not be prepared to receive them anyway due to
988 : * missing state information. Client will likely retry
989 : * authentication, so this should not be an issue. */
990 2 : if (auth)
991 1 : radius_client_flush(radius, 1);
992 : else {
993 2 : radius_client_update_acct_msgs(
994 1 : radius, nserv->shared_secret,
995 : nserv->shared_secret_len);
996 : }
997 : }
998 :
999 : /* Reset retry counters for the new server */
1000 2266 : for (entry = radius->msgs; oserv && oserv != nserv && entry;
1001 2 : entry = entry->next) {
1002 2 : if ((auth && entry->msg_type != RADIUS_AUTH) ||
1003 1 : (!auth && entry->msg_type != RADIUS_ACCT))
1004 1 : continue;
1005 1 : entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
1006 1 : entry->attempts = 0;
1007 1 : entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
1008 : }
1009 :
1010 1132 : if (radius->msgs) {
1011 892 : eloop_cancel_timeout(radius_client_timer, radius, NULL);
1012 892 : eloop_register_timeout(RADIUS_CLIENT_FIRST_WAIT, 0,
1013 : radius_client_timer, radius, NULL);
1014 : }
1015 :
1016 1132 : switch (nserv->addr.af) {
1017 : case AF_INET:
1018 1130 : os_memset(&serv, 0, sizeof(serv));
1019 1130 : serv.sin_family = AF_INET;
1020 1130 : serv.sin_addr.s_addr = nserv->addr.u.v4.s_addr;
1021 1130 : serv.sin_port = htons(nserv->port);
1022 1130 : addr = (struct sockaddr *) &serv;
1023 1130 : addrlen = sizeof(serv);
1024 1130 : sel_sock = sock;
1025 1130 : break;
1026 : #ifdef CONFIG_IPV6
1027 : case AF_INET6:
1028 2 : os_memset(&serv6, 0, sizeof(serv6));
1029 2 : serv6.sin6_family = AF_INET6;
1030 2 : os_memcpy(&serv6.sin6_addr, &nserv->addr.u.v6,
1031 : sizeof(struct in6_addr));
1032 2 : serv6.sin6_port = htons(nserv->port);
1033 2 : addr = (struct sockaddr *) &serv6;
1034 2 : addrlen = sizeof(serv6);
1035 2 : sel_sock = sock6;
1036 2 : break;
1037 : #endif /* CONFIG_IPV6 */
1038 : default:
1039 0 : return -1;
1040 : }
1041 :
1042 1132 : if (conf->force_client_addr) {
1043 0 : switch (conf->client_addr.af) {
1044 : case AF_INET:
1045 0 : os_memset(&claddr, 0, sizeof(claddr));
1046 0 : claddr.sin_family = AF_INET;
1047 0 : claddr.sin_addr.s_addr = conf->client_addr.u.v4.s_addr;
1048 0 : claddr.sin_port = htons(0);
1049 0 : cl_addr = (struct sockaddr *) &claddr;
1050 0 : claddrlen = sizeof(claddr);
1051 0 : break;
1052 : #ifdef CONFIG_IPV6
1053 : case AF_INET6:
1054 0 : os_memset(&claddr6, 0, sizeof(claddr6));
1055 0 : claddr6.sin6_family = AF_INET6;
1056 0 : os_memcpy(&claddr6.sin6_addr, &conf->client_addr.u.v6,
1057 : sizeof(struct in6_addr));
1058 0 : claddr6.sin6_port = htons(0);
1059 0 : cl_addr = (struct sockaddr *) &claddr6;
1060 0 : claddrlen = sizeof(claddr6);
1061 0 : break;
1062 : #endif /* CONFIG_IPV6 */
1063 : default:
1064 0 : return -1;
1065 : }
1066 :
1067 0 : if (bind(sel_sock, cl_addr, claddrlen) < 0) {
1068 0 : wpa_printf(MSG_INFO, "bind[radius]: %s",
1069 0 : strerror(errno));
1070 0 : return -1;
1071 : }
1072 : }
1073 :
1074 1132 : if (connect(sel_sock, addr, addrlen) < 0) {
1075 891 : wpa_printf(MSG_INFO, "connect[radius]: %s", strerror(errno));
1076 891 : return -1;
1077 : }
1078 :
1079 : #ifndef CONFIG_NATIVE_WINDOWS
1080 241 : switch (nserv->addr.af) {
1081 : case AF_INET:
1082 239 : claddrlen = sizeof(claddr);
1083 239 : if (getsockname(sel_sock, (struct sockaddr *) &claddr,
1084 : &claddrlen) == 0) {
1085 239 : wpa_printf(MSG_DEBUG, "RADIUS local address: %s:%u",
1086 : inet_ntoa(claddr.sin_addr),
1087 239 : ntohs(claddr.sin_port));
1088 : }
1089 239 : break;
1090 : #ifdef CONFIG_IPV6
1091 : case AF_INET6: {
1092 2 : claddrlen = sizeof(claddr6);
1093 2 : if (getsockname(sel_sock, (struct sockaddr *) &claddr6,
1094 : &claddrlen) == 0) {
1095 2 : wpa_printf(MSG_DEBUG, "RADIUS local address: %s:%u",
1096 : inet_ntop(AF_INET6, &claddr6.sin6_addr,
1097 : abuf, sizeof(abuf)),
1098 2 : ntohs(claddr6.sin6_port));
1099 : }
1100 2 : break;
1101 : }
1102 : #endif /* CONFIG_IPV6 */
1103 : }
1104 : #endif /* CONFIG_NATIVE_WINDOWS */
1105 :
1106 241 : if (auth)
1107 232 : radius->auth_sock = sel_sock;
1108 : else
1109 9 : radius->acct_sock = sel_sock;
1110 :
1111 241 : return 0;
1112 : }
1113 :
1114 :
1115 0 : static void radius_retry_primary_timer(void *eloop_ctx, void *timeout_ctx)
1116 : {
1117 0 : struct radius_client_data *radius = eloop_ctx;
1118 0 : struct hostapd_radius_servers *conf = radius->conf;
1119 : struct hostapd_radius_server *oserv;
1120 :
1121 0 : if (radius->auth_sock >= 0 && conf->auth_servers &&
1122 0 : conf->auth_server != conf->auth_servers) {
1123 0 : oserv = conf->auth_server;
1124 0 : conf->auth_server = conf->auth_servers;
1125 0 : radius_change_server(radius, conf->auth_server, oserv,
1126 : radius->auth_serv_sock,
1127 : radius->auth_serv_sock6, 1);
1128 : }
1129 :
1130 0 : if (radius->acct_sock >= 0 && conf->acct_servers &&
1131 0 : conf->acct_server != conf->acct_servers) {
1132 0 : oserv = conf->acct_server;
1133 0 : conf->acct_server = conf->acct_servers;
1134 0 : radius_change_server(radius, conf->acct_server, oserv,
1135 : radius->acct_serv_sock,
1136 : radius->acct_serv_sock6, 0);
1137 : }
1138 :
1139 0 : if (conf->retry_primary_interval)
1140 0 : eloop_register_timeout(conf->retry_primary_interval, 0,
1141 : radius_retry_primary_timer, radius,
1142 : NULL);
1143 0 : }
1144 :
1145 :
1146 1130 : static int radius_client_disable_pmtu_discovery(int s)
1147 : {
1148 1130 : int r = -1;
1149 : #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
1150 : /* Turn off Path MTU discovery on IPv4/UDP sockets. */
1151 1130 : int action = IP_PMTUDISC_DONT;
1152 1130 : r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
1153 : sizeof(action));
1154 1130 : if (r == -1)
1155 0 : wpa_printf(MSG_ERROR, "RADIUS: Failed to set IP_MTU_DISCOVER: %s",
1156 0 : strerror(errno));
1157 : #endif
1158 1130 : return r;
1159 : }
1160 :
1161 :
1162 1751 : static void radius_close_auth_sockets(struct radius_client_data *radius)
1163 : {
1164 1751 : radius->auth_sock = -1;
1165 :
1166 1751 : if (radius->auth_serv_sock >= 0) {
1167 1118 : eloop_unregister_read_sock(radius->auth_serv_sock);
1168 1118 : close(radius->auth_serv_sock);
1169 1118 : radius->auth_serv_sock = -1;
1170 : }
1171 : #ifdef CONFIG_IPV6
1172 1751 : if (radius->auth_serv_sock6 >= 0) {
1173 1118 : eloop_unregister_read_sock(radius->auth_serv_sock6);
1174 1118 : close(radius->auth_serv_sock6);
1175 1118 : radius->auth_serv_sock6 = -1;
1176 : }
1177 : #endif /* CONFIG_IPV6 */
1178 1751 : }
1179 :
1180 :
1181 645 : static void radius_close_acct_sockets(struct radius_client_data *radius)
1182 : {
1183 645 : radius->acct_sock = -1;
1184 :
1185 645 : if (radius->acct_serv_sock >= 0) {
1186 12 : eloop_unregister_read_sock(radius->acct_serv_sock);
1187 12 : close(radius->acct_serv_sock);
1188 12 : radius->acct_serv_sock = -1;
1189 : }
1190 : #ifdef CONFIG_IPV6
1191 645 : if (radius->acct_serv_sock6 >= 0) {
1192 12 : eloop_unregister_read_sock(radius->acct_serv_sock6);
1193 12 : close(radius->acct_serv_sock6);
1194 12 : radius->acct_serv_sock6 = -1;
1195 : }
1196 : #endif /* CONFIG_IPV6 */
1197 645 : }
1198 :
1199 :
1200 1118 : static int radius_client_init_auth(struct radius_client_data *radius)
1201 : {
1202 1118 : struct hostapd_radius_servers *conf = radius->conf;
1203 1118 : int ok = 0;
1204 :
1205 1118 : radius_close_auth_sockets(radius);
1206 :
1207 1118 : radius->auth_serv_sock = socket(PF_INET, SOCK_DGRAM, 0);
1208 1118 : if (radius->auth_serv_sock < 0)
1209 0 : wpa_printf(MSG_INFO, "RADIUS: socket[PF_INET,SOCK_DGRAM]: %s",
1210 0 : strerror(errno));
1211 : else {
1212 1118 : radius_client_disable_pmtu_discovery(radius->auth_serv_sock);
1213 1118 : ok++;
1214 : }
1215 :
1216 : #ifdef CONFIG_IPV6
1217 1118 : radius->auth_serv_sock6 = socket(PF_INET6, SOCK_DGRAM, 0);
1218 1118 : if (radius->auth_serv_sock6 < 0)
1219 0 : wpa_printf(MSG_INFO, "RADIUS: socket[PF_INET6,SOCK_DGRAM]: %s",
1220 0 : strerror(errno));
1221 : else
1222 1118 : ok++;
1223 : #endif /* CONFIG_IPV6 */
1224 :
1225 1118 : if (ok == 0)
1226 0 : return -1;
1227 :
1228 1118 : radius_change_server(radius, conf->auth_server, NULL,
1229 : radius->auth_serv_sock, radius->auth_serv_sock6,
1230 : 1);
1231 :
1232 2236 : if (radius->auth_serv_sock >= 0 &&
1233 1118 : eloop_register_read_sock(radius->auth_serv_sock,
1234 : radius_client_receive, radius,
1235 : (void *) RADIUS_AUTH)) {
1236 0 : wpa_printf(MSG_INFO, "RADIUS: Could not register read socket for authentication server");
1237 0 : radius_close_auth_sockets(radius);
1238 0 : return -1;
1239 : }
1240 :
1241 : #ifdef CONFIG_IPV6
1242 2236 : if (radius->auth_serv_sock6 >= 0 &&
1243 1118 : eloop_register_read_sock(radius->auth_serv_sock6,
1244 : radius_client_receive, radius,
1245 : (void *) RADIUS_AUTH)) {
1246 0 : wpa_printf(MSG_INFO, "RADIUS: Could not register read socket for authentication server");
1247 0 : radius_close_auth_sockets(radius);
1248 0 : return -1;
1249 : }
1250 : #endif /* CONFIG_IPV6 */
1251 :
1252 1118 : return 0;
1253 : }
1254 :
1255 :
1256 12 : static int radius_client_init_acct(struct radius_client_data *radius)
1257 : {
1258 12 : struct hostapd_radius_servers *conf = radius->conf;
1259 12 : int ok = 0;
1260 :
1261 12 : radius_close_acct_sockets(radius);
1262 :
1263 12 : radius->acct_serv_sock = socket(PF_INET, SOCK_DGRAM, 0);
1264 12 : if (radius->acct_serv_sock < 0)
1265 0 : wpa_printf(MSG_INFO, "RADIUS: socket[PF_INET,SOCK_DGRAM]: %s",
1266 0 : strerror(errno));
1267 : else {
1268 12 : radius_client_disable_pmtu_discovery(radius->acct_serv_sock);
1269 12 : ok++;
1270 : }
1271 :
1272 : #ifdef CONFIG_IPV6
1273 12 : radius->acct_serv_sock6 = socket(PF_INET6, SOCK_DGRAM, 0);
1274 12 : if (radius->acct_serv_sock6 < 0)
1275 0 : wpa_printf(MSG_INFO, "RADIUS: socket[PF_INET6,SOCK_DGRAM]: %s",
1276 0 : strerror(errno));
1277 : else
1278 12 : ok++;
1279 : #endif /* CONFIG_IPV6 */
1280 :
1281 12 : if (ok == 0)
1282 0 : return -1;
1283 :
1284 12 : radius_change_server(radius, conf->acct_server, NULL,
1285 : radius->acct_serv_sock, radius->acct_serv_sock6,
1286 : 0);
1287 :
1288 24 : if (radius->acct_serv_sock >= 0 &&
1289 12 : eloop_register_read_sock(radius->acct_serv_sock,
1290 : radius_client_receive, radius,
1291 : (void *) RADIUS_ACCT)) {
1292 0 : wpa_printf(MSG_INFO, "RADIUS: Could not register read socket for accounting server");
1293 0 : radius_close_acct_sockets(radius);
1294 0 : return -1;
1295 : }
1296 :
1297 : #ifdef CONFIG_IPV6
1298 24 : if (radius->acct_serv_sock6 >= 0 &&
1299 12 : eloop_register_read_sock(radius->acct_serv_sock6,
1300 : radius_client_receive, radius,
1301 : (void *) RADIUS_ACCT)) {
1302 0 : wpa_printf(MSG_INFO, "RADIUS: Could not register read socket for accounting server");
1303 0 : radius_close_acct_sockets(radius);
1304 0 : return -1;
1305 : }
1306 : #endif /* CONFIG_IPV6 */
1307 :
1308 12 : return 0;
1309 : }
1310 :
1311 :
1312 : /**
1313 : * radius_client_init - Initialize RADIUS client
1314 : * @ctx: Callback context to be used in hostapd_logger() calls
1315 : * @conf: RADIUS client configuration (RADIUS servers)
1316 : * Returns: Pointer to private RADIUS client context or %NULL on failure
1317 : *
1318 : * The caller is responsible for keeping the configuration data available for
1319 : * the lifetime of the RADIUS client, i.e., until radius_client_deinit() is
1320 : * called for the returned context pointer.
1321 : */
1322 : struct radius_client_data *
1323 633 : radius_client_init(void *ctx, struct hostapd_radius_servers *conf)
1324 : {
1325 : struct radius_client_data *radius;
1326 :
1327 633 : radius = os_zalloc(sizeof(struct radius_client_data));
1328 633 : if (radius == NULL)
1329 0 : return NULL;
1330 :
1331 633 : radius->ctx = ctx;
1332 633 : radius->conf = conf;
1333 633 : radius->auth_serv_sock = radius->acct_serv_sock =
1334 633 : radius->auth_serv_sock6 = radius->acct_serv_sock6 =
1335 633 : radius->auth_sock = radius->acct_sock = -1;
1336 :
1337 633 : if (conf->auth_server && radius_client_init_auth(radius)) {
1338 0 : radius_client_deinit(radius);
1339 0 : return NULL;
1340 : }
1341 :
1342 633 : if (conf->acct_server && radius_client_init_acct(radius)) {
1343 0 : radius_client_deinit(radius);
1344 0 : return NULL;
1345 : }
1346 :
1347 633 : if (conf->retry_primary_interval)
1348 0 : eloop_register_timeout(conf->retry_primary_interval, 0,
1349 : radius_retry_primary_timer, radius,
1350 : NULL);
1351 :
1352 633 : return radius;
1353 : }
1354 :
1355 :
1356 : /**
1357 : * radius_client_deinit - Deinitialize RADIUS client
1358 : * @radius: RADIUS client context from radius_client_init()
1359 : */
1360 637 : void radius_client_deinit(struct radius_client_data *radius)
1361 : {
1362 637 : if (!radius)
1363 641 : return;
1364 :
1365 633 : radius_close_auth_sockets(radius);
1366 633 : radius_close_acct_sockets(radius);
1367 :
1368 633 : eloop_cancel_timeout(radius_retry_primary_timer, radius, NULL);
1369 :
1370 633 : radius_client_flush(radius, 0);
1371 633 : os_free(radius->auth_handlers);
1372 633 : os_free(radius->acct_handlers);
1373 633 : os_free(radius);
1374 : }
1375 :
1376 :
1377 : /**
1378 : * radius_client_flush_auth - Flush pending RADIUS messages for an address
1379 : * @radius: RADIUS client context from radius_client_init()
1380 : * @addr: MAC address of the related device
1381 : *
1382 : * This function can be used to remove pending RADIUS authentication messages
1383 : * that are related to a specific device. The addr parameter is matched with
1384 : * the one used in radius_client_send() call that was used to transmit the
1385 : * authentication request.
1386 : */
1387 1056 : void radius_client_flush_auth(struct radius_client_data *radius,
1388 : const u8 *addr)
1389 : {
1390 : struct radius_msg_list *entry, *prev, *tmp;
1391 :
1392 1056 : prev = NULL;
1393 1056 : entry = radius->msgs;
1394 2138 : while (entry) {
1395 35 : if (entry->msg_type == RADIUS_AUTH &&
1396 9 : os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
1397 8 : hostapd_logger(radius->ctx, addr,
1398 : HOSTAPD_MODULE_RADIUS,
1399 : HOSTAPD_LEVEL_DEBUG,
1400 : "Removing pending RADIUS authentication"
1401 : " message for removed client");
1402 :
1403 8 : if (prev)
1404 0 : prev->next = entry->next;
1405 : else
1406 8 : radius->msgs = entry->next;
1407 :
1408 8 : tmp = entry;
1409 8 : entry = entry->next;
1410 8 : radius_client_msg_free(tmp);
1411 8 : radius->num_msgs--;
1412 8 : continue;
1413 : }
1414 :
1415 18 : prev = entry;
1416 18 : entry = entry->next;
1417 : }
1418 1056 : }
1419 :
1420 :
1421 7 : static int radius_client_dump_auth_server(char *buf, size_t buflen,
1422 : struct hostapd_radius_server *serv,
1423 : struct radius_client_data *cli)
1424 : {
1425 7 : int pending = 0;
1426 : struct radius_msg_list *msg;
1427 : char abuf[50];
1428 :
1429 7 : if (cli) {
1430 18 : for (msg = cli->msgs; msg; msg = msg->next) {
1431 11 : if (msg->msg_type == RADIUS_AUTH)
1432 2 : pending++;
1433 : }
1434 : }
1435 :
1436 14 : return os_snprintf(buf, buflen,
1437 : "radiusAuthServerIndex=%d\n"
1438 : "radiusAuthServerAddress=%s\n"
1439 : "radiusAuthClientServerPortNumber=%d\n"
1440 : "radiusAuthClientRoundTripTime=%d\n"
1441 : "radiusAuthClientAccessRequests=%u\n"
1442 : "radiusAuthClientAccessRetransmissions=%u\n"
1443 : "radiusAuthClientAccessAccepts=%u\n"
1444 : "radiusAuthClientAccessRejects=%u\n"
1445 : "radiusAuthClientAccessChallenges=%u\n"
1446 : "radiusAuthClientMalformedAccessResponses=%u\n"
1447 : "radiusAuthClientBadAuthenticators=%u\n"
1448 : "radiusAuthClientPendingRequests=%u\n"
1449 : "radiusAuthClientTimeouts=%u\n"
1450 : "radiusAuthClientUnknownTypes=%u\n"
1451 : "radiusAuthClientPacketsDropped=%u\n",
1452 : serv->index,
1453 7 : hostapd_ip_txt(&serv->addr, abuf, sizeof(abuf)),
1454 : serv->port,
1455 : serv->round_trip_time,
1456 : serv->requests,
1457 : serv->retransmissions,
1458 : serv->access_accepts,
1459 : serv->access_rejects,
1460 : serv->access_challenges,
1461 : serv->malformed_responses,
1462 : serv->bad_authenticators,
1463 : pending,
1464 : serv->timeouts,
1465 : serv->unknown_types,
1466 : serv->packets_dropped);
1467 : }
1468 :
1469 :
1470 5 : static int radius_client_dump_acct_server(char *buf, size_t buflen,
1471 : struct hostapd_radius_server *serv,
1472 : struct radius_client_data *cli)
1473 : {
1474 5 : int pending = 0;
1475 : struct radius_msg_list *msg;
1476 : char abuf[50];
1477 :
1478 5 : if (cli) {
1479 14 : for (msg = cli->msgs; msg; msg = msg->next) {
1480 10 : if (msg->msg_type == RADIUS_ACCT ||
1481 1 : msg->msg_type == RADIUS_ACCT_INTERIM)
1482 9 : pending++;
1483 : }
1484 : }
1485 :
1486 10 : return os_snprintf(buf, buflen,
1487 : "radiusAccServerIndex=%d\n"
1488 : "radiusAccServerAddress=%s\n"
1489 : "radiusAccClientServerPortNumber=%d\n"
1490 : "radiusAccClientRoundTripTime=%d\n"
1491 : "radiusAccClientRequests=%u\n"
1492 : "radiusAccClientRetransmissions=%u\n"
1493 : "radiusAccClientResponses=%u\n"
1494 : "radiusAccClientMalformedResponses=%u\n"
1495 : "radiusAccClientBadAuthenticators=%u\n"
1496 : "radiusAccClientPendingRequests=%u\n"
1497 : "radiusAccClientTimeouts=%u\n"
1498 : "radiusAccClientUnknownTypes=%u\n"
1499 : "radiusAccClientPacketsDropped=%u\n",
1500 : serv->index,
1501 5 : hostapd_ip_txt(&serv->addr, abuf, sizeof(abuf)),
1502 : serv->port,
1503 : serv->round_trip_time,
1504 : serv->requests,
1505 : serv->retransmissions,
1506 : serv->responses,
1507 : serv->malformed_responses,
1508 : serv->bad_authenticators,
1509 : pending,
1510 : serv->timeouts,
1511 : serv->unknown_types,
1512 : serv->packets_dropped);
1513 : }
1514 :
1515 :
1516 : /**
1517 : * radius_client_get_mib - Get RADIUS client MIB information
1518 : * @radius: RADIUS client context from radius_client_init()
1519 : * @buf: Buffer for returning MIB data in text format
1520 : * @buflen: Maximum buf length in octets
1521 : * Returns: Number of octets written into the buffer
1522 : */
1523 7 : int radius_client_get_mib(struct radius_client_data *radius, char *buf,
1524 : size_t buflen)
1525 : {
1526 7 : struct hostapd_radius_servers *conf = radius->conf;
1527 : int i;
1528 : struct hostapd_radius_server *serv;
1529 7 : int count = 0;
1530 :
1531 7 : if (conf->auth_servers) {
1532 14 : for (i = 0; i < conf->num_auth_servers; i++) {
1533 7 : serv = &conf->auth_servers[i];
1534 7 : count += radius_client_dump_auth_server(
1535 : buf + count, buflen - count, serv,
1536 7 : serv == conf->auth_server ?
1537 : radius : NULL);
1538 : }
1539 : }
1540 :
1541 7 : if (conf->acct_servers) {
1542 10 : for (i = 0; i < conf->num_acct_servers; i++) {
1543 5 : serv = &conf->acct_servers[i];
1544 5 : count += radius_client_dump_acct_server(
1545 : buf + count, buflen - count, serv,
1546 5 : serv == conf->acct_server ?
1547 : radius : NULL);
1548 : }
1549 : }
1550 :
1551 7 : return count;
1552 : }
1553 :
1554 :
1555 18 : void radius_client_reconfig(struct radius_client_data *radius,
1556 : struct hostapd_radius_servers *conf)
1557 : {
1558 18 : if (radius)
1559 18 : radius->conf = conf;
1560 18 : }
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