1 /*
2 * WPA Supplicant - privilege separated driver interface
3 * Copyright (c) 2007-2009, 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 #include <sys/un.h>
11
12 #include "common.h"
13 #include "driver.h"
14 #include "eloop.h"
15 #include "common/privsep_commands.h"
16
17
18 struct wpa_driver_privsep_data {
19 void *ctx;
20 u8 own_addr[ETH_ALEN];
21 int priv_socket;
22 char *own_socket_path;
23 int cmd_socket;
24 char *own_cmd_path;
25 struct sockaddr_un priv_addr;
26 char ifname[16];
27 };
28
29
wpa_priv_reg_cmd(struct wpa_driver_privsep_data * drv,int cmd)30 static int wpa_priv_reg_cmd(struct wpa_driver_privsep_data *drv, int cmd)
31 {
32 int res;
33
34 res = sendto(drv->priv_socket, &cmd, sizeof(cmd), 0,
35 (struct sockaddr *) &drv->priv_addr,
36 sizeof(drv->priv_addr));
37 if (res < 0)
38 wpa_printf(MSG_ERROR, "sendto: %s", strerror(errno));
39 return res < 0 ? -1 : 0;
40 }
41
42
wpa_priv_cmd(struct wpa_driver_privsep_data * drv,int cmd,const void * data,size_t data_len,void * reply,size_t * reply_len)43 static int wpa_priv_cmd(struct wpa_driver_privsep_data *drv, int cmd,
44 const void *data, size_t data_len,
45 void *reply, size_t *reply_len)
46 {
47 struct msghdr msg;
48 struct iovec io[2];
49
50 io[0].iov_base = &cmd;
51 io[0].iov_len = sizeof(cmd);
52 io[1].iov_base = (u8 *) data;
53 io[1].iov_len = data_len;
54
55 os_memset(&msg, 0, sizeof(msg));
56 msg.msg_iov = io;
57 msg.msg_iovlen = data ? 2 : 1;
58 msg.msg_name = &drv->priv_addr;
59 msg.msg_namelen = sizeof(drv->priv_addr);
60
61 if (sendmsg(drv->cmd_socket, &msg, 0) < 0) {
62 wpa_printf(MSG_ERROR, "sendmsg(cmd_socket): %s",
63 strerror(errno));
64 return -1;
65 }
66
67 if (reply) {
68 fd_set rfds;
69 struct timeval tv;
70 int res;
71
72 FD_ZERO(&rfds);
73 FD_SET(drv->cmd_socket, &rfds);
74 tv.tv_sec = 5;
75 tv.tv_usec = 0;
76 res = select(drv->cmd_socket + 1, &rfds, NULL, NULL, &tv);
77 if (res < 0 && errno != EINTR) {
78 wpa_printf(MSG_ERROR, "select: %s", strerror(errno));
79 return -1;
80 }
81
82 if (FD_ISSET(drv->cmd_socket, &rfds)) {
83 res = recv(drv->cmd_socket, reply, *reply_len, 0);
84 if (res < 0) {
85 wpa_printf(MSG_ERROR, "recv: %s",
86 strerror(errno));
87 return -1;
88 }
89 *reply_len = res;
90 } else {
91 wpa_printf(MSG_DEBUG, "PRIVSEP: Timeout while waiting "
92 "for reply (cmd=%d)", cmd);
93 return -1;
94 }
95 }
96
97 return 0;
98 }
99
100
wpa_driver_privsep_scan(void * priv,struct wpa_driver_scan_params * params)101 static int wpa_driver_privsep_scan(void *priv,
102 struct wpa_driver_scan_params *params)
103 {
104 struct wpa_driver_privsep_data *drv = priv;
105 struct privsep_cmd_scan scan;
106 size_t i;
107
108 wpa_printf(MSG_DEBUG, "%s: priv=%p", __func__, priv);
109 os_memset(&scan, 0, sizeof(scan));
110 scan.num_ssids = params->num_ssids;
111 for (i = 0; i < params->num_ssids; i++) {
112 if (!params->ssids[i].ssid)
113 continue;
114 scan.ssid_lens[i] = params->ssids[i].ssid_len;
115 os_memcpy(scan.ssids[i], params->ssids[i].ssid,
116 scan.ssid_lens[i]);
117 }
118
119 for (i = 0; i < PRIVSEP_MAX_SCAN_FREQS &&
120 params->freqs && params->freqs[i]; i++)
121 scan.freqs[i] = params->freqs[i];
122 scan.num_freqs = i;
123
124 return wpa_priv_cmd(drv, PRIVSEP_CMD_SCAN, &scan, sizeof(scan),
125 NULL, NULL);
126 }
127
128
129 static struct wpa_scan_results *
wpa_driver_privsep_get_scan_results2(void * priv)130 wpa_driver_privsep_get_scan_results2(void *priv)
131 {
132 struct wpa_driver_privsep_data *drv = priv;
133 int res, num;
134 u8 *buf, *pos, *end;
135 size_t reply_len = 60000;
136 struct wpa_scan_results *results;
137 struct wpa_scan_res *r;
138
139 buf = os_malloc(reply_len);
140 if (buf == NULL)
141 return NULL;
142 res = wpa_priv_cmd(drv, PRIVSEP_CMD_GET_SCAN_RESULTS,
143 NULL, 0, buf, &reply_len);
144 if (res < 0) {
145 os_free(buf);
146 return NULL;
147 }
148
149 wpa_printf(MSG_DEBUG, "privsep: Received %lu bytes of scan results",
150 (unsigned long) reply_len);
151 if (reply_len < sizeof(int)) {
152 wpa_printf(MSG_DEBUG, "privsep: Invalid scan result len %lu",
153 (unsigned long) reply_len);
154 os_free(buf);
155 return NULL;
156 }
157
158 pos = buf;
159 end = buf + reply_len;
160 os_memcpy(&num, pos, sizeof(int));
161 if (num < 0 || num > 1000) {
162 os_free(buf);
163 return NULL;
164 }
165 pos += sizeof(int);
166
167 results = os_zalloc(sizeof(*results));
168 if (results == NULL) {
169 os_free(buf);
170 return NULL;
171 }
172
173 results->res = os_calloc(num, sizeof(struct wpa_scan_res *));
174 if (results->res == NULL) {
175 os_free(results);
176 os_free(buf);
177 return NULL;
178 }
179
180 while (results->num < (size_t) num && end - pos > (int) sizeof(int)) {
181 int len;
182 os_memcpy(&len, pos, sizeof(int));
183 pos += sizeof(int);
184 if (len < 0 || len > 10000 || len > end - pos)
185 break;
186
187 r = os_memdup(pos, len);
188 if (r == NULL)
189 break;
190 pos += len;
191 if (sizeof(*r) + r->ie_len + r->beacon_ie_len > (size_t) len) {
192 wpa_printf(MSG_ERROR,
193 "privsep: Invalid scan result len (%d + %d + %d > %d)",
194 (int) sizeof(*r), (int) r->ie_len,
195 (int) r->beacon_ie_len, len);
196 os_free(r);
197 break;
198 }
199
200 results->res[results->num++] = r;
201 }
202
203 os_free(buf);
204 return results;
205 }
206
207
wpa_driver_privsep_set_key(const char * ifname,void * priv,enum wpa_alg alg,const u8 * addr,int key_idx,int set_tx,const u8 * seq,size_t seq_len,const u8 * key,size_t key_len)208 static int wpa_driver_privsep_set_key(const char *ifname, void *priv,
209 enum wpa_alg alg, const u8 *addr,
210 int key_idx, int set_tx,
211 const u8 *seq, size_t seq_len,
212 const u8 *key, size_t key_len)
213 {
214 struct wpa_driver_privsep_data *drv = priv;
215 struct privsep_cmd_set_key cmd;
216
217 wpa_printf(MSG_DEBUG, "%s: priv=%p alg=%d key_idx=%d set_tx=%d",
218 __func__, priv, alg, key_idx, set_tx);
219
220 os_memset(&cmd, 0, sizeof(cmd));
221 cmd.alg = alg;
222 if (addr)
223 os_memcpy(cmd.addr, addr, ETH_ALEN);
224 else
225 os_memset(cmd.addr, 0xff, ETH_ALEN);
226 cmd.key_idx = key_idx;
227 cmd.set_tx = set_tx;
228 if (seq && seq_len > 0 && seq_len < sizeof(cmd.seq)) {
229 os_memcpy(cmd.seq, seq, seq_len);
230 cmd.seq_len = seq_len;
231 }
232 if (key && key_len > 0 && key_len < sizeof(cmd.key)) {
233 os_memcpy(cmd.key, key, key_len);
234 cmd.key_len = key_len;
235 }
236
237 return wpa_priv_cmd(drv, PRIVSEP_CMD_SET_KEY, &cmd, sizeof(cmd),
238 NULL, NULL);
239 }
240
241
wpa_driver_privsep_authenticate(void * priv,struct wpa_driver_auth_params * params)242 static int wpa_driver_privsep_authenticate(
243 void *priv, struct wpa_driver_auth_params *params)
244 {
245 struct wpa_driver_privsep_data *drv = priv;
246 struct privsep_cmd_authenticate *data;
247 int i, res;
248 size_t buflen;
249 u8 *pos;
250
251 wpa_printf(MSG_DEBUG, "%s: priv=%p freq=%d bssid=" MACSTR
252 " auth_alg=%d local_state_change=%d p2p=%d",
253 __func__, priv, params->freq, MAC2STR(params->bssid),
254 params->auth_alg, params->local_state_change, params->p2p);
255
256 buflen = sizeof(*data) + params->ie_len + params->auth_data_len;
257 data = os_zalloc(buflen);
258 if (data == NULL)
259 return -1;
260
261 data->freq = params->freq;
262 os_memcpy(data->bssid, params->bssid, ETH_ALEN);
263 os_memcpy(data->ssid, params->ssid, params->ssid_len);
264 data->ssid_len = params->ssid_len;
265 data->auth_alg = params->auth_alg;
266 data->ie_len = params->ie_len;
267 for (i = 0; i < 4; i++) {
268 if (params->wep_key[i])
269 os_memcpy(data->wep_key[i], params->wep_key[i],
270 params->wep_key_len[i]);
271 data->wep_key_len[i] = params->wep_key_len[i];
272 }
273 data->wep_tx_keyidx = params->wep_tx_keyidx;
274 data->local_state_change = params->local_state_change;
275 data->p2p = params->p2p;
276 pos = (u8 *) (data + 1);
277 if (params->ie_len) {
278 os_memcpy(pos, params->ie, params->ie_len);
279 pos += params->ie_len;
280 }
281 if (params->auth_data_len)
282 os_memcpy(pos, params->auth_data, params->auth_data_len);
283
284 res = wpa_priv_cmd(drv, PRIVSEP_CMD_AUTHENTICATE, data, buflen,
285 NULL, NULL);
286 os_free(data);
287
288 return res;
289 }
290
291
wpa_driver_privsep_associate(void * priv,struct wpa_driver_associate_params * params)292 static int wpa_driver_privsep_associate(
293 void *priv, struct wpa_driver_associate_params *params)
294 {
295 struct wpa_driver_privsep_data *drv = priv;
296 struct privsep_cmd_associate *data;
297 int res;
298 size_t buflen;
299
300 wpa_printf(MSG_DEBUG, "%s: priv=%p freq=%d pairwise_suite=%d "
301 "group_suite=%d key_mgmt_suite=%d auth_alg=%d mode=%d",
302 __func__, priv, params->freq.freq, params->pairwise_suite,
303 params->group_suite, params->key_mgmt_suite,
304 params->auth_alg, params->mode);
305
306 buflen = sizeof(*data) + params->wpa_ie_len;
307 data = os_zalloc(buflen);
308 if (data == NULL)
309 return -1;
310
311 if (params->bssid)
312 os_memcpy(data->bssid, params->bssid, ETH_ALEN);
313 os_memcpy(data->ssid, params->ssid, params->ssid_len);
314 data->ssid_len = params->ssid_len;
315 data->hwmode = params->freq.mode;
316 data->freq = params->freq.freq;
317 data->channel = params->freq.channel;
318 data->pairwise_suite = params->pairwise_suite;
319 data->group_suite = params->group_suite;
320 data->key_mgmt_suite = params->key_mgmt_suite;
321 data->auth_alg = params->auth_alg;
322 data->mode = params->mode;
323 data->wpa_ie_len = params->wpa_ie_len;
324 if (params->wpa_ie)
325 os_memcpy(data + 1, params->wpa_ie, params->wpa_ie_len);
326 /* TODO: add support for other assoc parameters */
327
328 res = wpa_priv_cmd(drv, PRIVSEP_CMD_ASSOCIATE, data, buflen,
329 NULL, NULL);
330 os_free(data);
331
332 return res;
333 }
334
335
wpa_driver_privsep_get_bssid(void * priv,u8 * bssid)336 static int wpa_driver_privsep_get_bssid(void *priv, u8 *bssid)
337 {
338 struct wpa_driver_privsep_data *drv = priv;
339 int res;
340 size_t len = ETH_ALEN;
341
342 res = wpa_priv_cmd(drv, PRIVSEP_CMD_GET_BSSID, NULL, 0, bssid, &len);
343 if (res < 0 || len != ETH_ALEN)
344 return -1;
345 return 0;
346 }
347
348
wpa_driver_privsep_get_ssid(void * priv,u8 * ssid)349 static int wpa_driver_privsep_get_ssid(void *priv, u8 *ssid)
350 {
351 struct wpa_driver_privsep_data *drv = priv;
352 int res, ssid_len;
353 u8 reply[sizeof(int) + SSID_MAX_LEN];
354 size_t len = sizeof(reply);
355
356 res = wpa_priv_cmd(drv, PRIVSEP_CMD_GET_SSID, NULL, 0, reply, &len);
357 if (res < 0 || len < sizeof(int))
358 return -1;
359 os_memcpy(&ssid_len, reply, sizeof(int));
360 if (ssid_len < 0 || ssid_len > SSID_MAX_LEN ||
361 sizeof(int) + ssid_len > len) {
362 wpa_printf(MSG_DEBUG, "privsep: Invalid get SSID reply");
363 return -1;
364 }
365 os_memcpy(ssid, &reply[sizeof(int)], ssid_len);
366 return ssid_len;
367 }
368
369
wpa_driver_privsep_deauthenticate(void * priv,const u8 * addr,u16 reason_code)370 static int wpa_driver_privsep_deauthenticate(void *priv, const u8 *addr,
371 u16 reason_code)
372 {
373 //struct wpa_driver_privsep_data *drv = priv;
374 wpa_printf(MSG_DEBUG, "%s addr=" MACSTR " reason_code=%d",
375 __func__, MAC2STR(addr), reason_code);
376 wpa_printf(MSG_DEBUG, "%s - TODO", __func__);
377 return 0;
378 }
379
380
wpa_driver_privsep_event_auth(void * ctx,u8 * buf,size_t len)381 static void wpa_driver_privsep_event_auth(void *ctx, u8 *buf, size_t len)
382 {
383 union wpa_event_data data;
384 struct privsep_event_auth *auth;
385
386 os_memset(&data, 0, sizeof(data));
387 if (len < sizeof(*auth))
388 return;
389 auth = (struct privsep_event_auth *) buf;
390 if (len < sizeof(*auth) + auth->ies_len)
391 return;
392
393 os_memcpy(data.auth.peer, auth->peer, ETH_ALEN);
394 os_memcpy(data.auth.bssid, auth->bssid, ETH_ALEN);
395 data.auth.auth_type = auth->auth_type;
396 data.auth.auth_transaction = auth->auth_transaction;
397 data.auth.status_code = auth->status_code;
398 if (auth->ies_len) {
399 data.auth.ies = (u8 *) (auth + 1);
400 data.auth.ies_len = auth->ies_len;
401 }
402
403 wpa_supplicant_event(ctx, EVENT_AUTH, &data);
404 }
405
406
wpa_driver_privsep_event_assoc(void * ctx,enum wpa_event_type event,u8 * buf,size_t len)407 static void wpa_driver_privsep_event_assoc(void *ctx,
408 enum wpa_event_type event,
409 u8 *buf, size_t len)
410 {
411 union wpa_event_data data;
412 int inc_data = 0;
413 u8 *pos, *end;
414 int ie_len;
415
416 os_memset(&data, 0, sizeof(data));
417
418 pos = buf;
419 end = buf + len;
420
421 if (end - pos < (int) sizeof(int))
422 return;
423 os_memcpy(&ie_len, pos, sizeof(int));
424 pos += sizeof(int);
425 if (ie_len < 0 || ie_len > end - pos)
426 return;
427 if (ie_len) {
428 data.assoc_info.req_ies = pos;
429 data.assoc_info.req_ies_len = ie_len;
430 pos += ie_len;
431 inc_data = 1;
432 }
433
434 wpa_supplicant_event(ctx, event, inc_data ? &data : NULL);
435 }
436
437
wpa_driver_privsep_event_interface_status(void * ctx,u8 * buf,size_t len)438 static void wpa_driver_privsep_event_interface_status(void *ctx, u8 *buf,
439 size_t len)
440 {
441 union wpa_event_data data;
442 int ievent;
443
444 if (len < sizeof(int) ||
445 len - sizeof(int) > sizeof(data.interface_status.ifname))
446 return;
447
448 os_memcpy(&ievent, buf, sizeof(int));
449
450 os_memset(&data, 0, sizeof(data));
451 data.interface_status.ievent = ievent;
452 os_memcpy(data.interface_status.ifname, buf + sizeof(int),
453 len - sizeof(int));
454 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &data);
455 }
456
457
wpa_driver_privsep_event_michael_mic_failure(void * ctx,u8 * buf,size_t len)458 static void wpa_driver_privsep_event_michael_mic_failure(
459 void *ctx, u8 *buf, size_t len)
460 {
461 union wpa_event_data data;
462
463 if (len != sizeof(int))
464 return;
465
466 os_memset(&data, 0, sizeof(data));
467 os_memcpy(&data.michael_mic_failure.unicast, buf, sizeof(int));
468 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
469 }
470
471
wpa_driver_privsep_event_pmkid_candidate(void * ctx,u8 * buf,size_t len)472 static void wpa_driver_privsep_event_pmkid_candidate(void *ctx, u8 *buf,
473 size_t len)
474 {
475 union wpa_event_data data;
476
477 if (len != sizeof(struct pmkid_candidate))
478 return;
479
480 os_memset(&data, 0, sizeof(data));
481 os_memcpy(&data.pmkid_candidate, buf, len);
482 wpa_supplicant_event(ctx, EVENT_PMKID_CANDIDATE, &data);
483 }
484
485
wpa_driver_privsep_event_ft_response(void * ctx,u8 * buf,size_t len)486 static void wpa_driver_privsep_event_ft_response(void *ctx, u8 *buf,
487 size_t len)
488 {
489 union wpa_event_data data;
490
491 if (len < sizeof(int) + ETH_ALEN)
492 return;
493
494 os_memset(&data, 0, sizeof(data));
495 os_memcpy(&data.ft_ies.ft_action, buf, sizeof(int));
496 os_memcpy(data.ft_ies.target_ap, buf + sizeof(int), ETH_ALEN);
497 data.ft_ies.ies = buf + sizeof(int) + ETH_ALEN;
498 data.ft_ies.ies_len = len - sizeof(int) - ETH_ALEN;
499 wpa_supplicant_event(ctx, EVENT_FT_RESPONSE, &data);
500 }
501
502
wpa_driver_privsep_event_rx_eapol(void * ctx,u8 * buf,size_t len)503 static void wpa_driver_privsep_event_rx_eapol(void *ctx, u8 *buf, size_t len)
504 {
505 if (len < ETH_ALEN)
506 return;
507 drv_event_eapol_rx(ctx, buf, buf + ETH_ALEN, len - ETH_ALEN);
508 }
509
510
wpa_driver_privsep_receive(int sock,void * eloop_ctx,void * sock_ctx)511 static void wpa_driver_privsep_receive(int sock, void *eloop_ctx,
512 void *sock_ctx)
513 {
514 struct wpa_driver_privsep_data *drv = eloop_ctx;
515 u8 *buf, *event_buf;
516 size_t event_len;
517 int res, event;
518 enum privsep_event e;
519 struct sockaddr_un from;
520 socklen_t fromlen = sizeof(from);
521 const size_t buflen = 2000;
522
523 buf = os_malloc(buflen);
524 if (buf == NULL)
525 return;
526 res = recvfrom(sock, buf, buflen, 0,
527 (struct sockaddr *) &from, &fromlen);
528 if (res < 0) {
529 wpa_printf(MSG_ERROR, "recvfrom(priv_socket): %s",
530 strerror(errno));
531 os_free(buf);
532 return;
533 }
534
535 wpa_printf(MSG_DEBUG, "privsep_driver: received %u bytes", res);
536
537 if (res < (int) sizeof(int)) {
538 wpa_printf(MSG_DEBUG, "Too short event message (len=%d)", res);
539 return;
540 }
541
542 os_memcpy(&event, buf, sizeof(int));
543 event_buf = &buf[sizeof(int)];
544 event_len = res - sizeof(int);
545 wpa_printf(MSG_DEBUG, "privsep: Event %d received (len=%lu)",
546 event, (unsigned long) event_len);
547
548 e = event;
549 switch (e) {
550 case PRIVSEP_EVENT_SCAN_RESULTS:
551 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
552 break;
553 case PRIVSEP_EVENT_SCAN_STARTED:
554 wpa_supplicant_event(drv->ctx, EVENT_SCAN_STARTED, NULL);
555 break;
556 case PRIVSEP_EVENT_ASSOC:
557 wpa_driver_privsep_event_assoc(drv->ctx, EVENT_ASSOC,
558 event_buf, event_len);
559 break;
560 case PRIVSEP_EVENT_DISASSOC:
561 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
562 break;
563 case PRIVSEP_EVENT_ASSOCINFO:
564 wpa_driver_privsep_event_assoc(drv->ctx, EVENT_ASSOCINFO,
565 event_buf, event_len);
566 break;
567 case PRIVSEP_EVENT_MICHAEL_MIC_FAILURE:
568 wpa_driver_privsep_event_michael_mic_failure(
569 drv->ctx, event_buf, event_len);
570 break;
571 case PRIVSEP_EVENT_INTERFACE_STATUS:
572 wpa_driver_privsep_event_interface_status(drv->ctx, event_buf,
573 event_len);
574 break;
575 case PRIVSEP_EVENT_PMKID_CANDIDATE:
576 wpa_driver_privsep_event_pmkid_candidate(drv->ctx, event_buf,
577 event_len);
578 break;
579 case PRIVSEP_EVENT_FT_RESPONSE:
580 wpa_driver_privsep_event_ft_response(drv->ctx, event_buf,
581 event_len);
582 break;
583 case PRIVSEP_EVENT_RX_EAPOL:
584 wpa_driver_privsep_event_rx_eapol(drv->ctx, event_buf,
585 event_len);
586 break;
587 case PRIVSEP_EVENT_AUTH:
588 wpa_driver_privsep_event_auth(drv->ctx, event_buf, event_len);
589 break;
590 }
591
592 os_free(buf);
593 }
594
595
wpa_driver_privsep_init(void * ctx,const char * ifname)596 static void * wpa_driver_privsep_init(void *ctx, const char *ifname)
597 {
598 struct wpa_driver_privsep_data *drv;
599
600 drv = os_zalloc(sizeof(*drv));
601 if (drv == NULL)
602 return NULL;
603 drv->ctx = ctx;
604 drv->priv_socket = -1;
605 drv->cmd_socket = -1;
606 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
607
608 return drv;
609 }
610
611
wpa_driver_privsep_deinit(void * priv)612 static void wpa_driver_privsep_deinit(void *priv)
613 {
614 struct wpa_driver_privsep_data *drv = priv;
615
616 if (drv->priv_socket >= 0) {
617 wpa_priv_reg_cmd(drv, PRIVSEP_CMD_UNREGISTER);
618 eloop_unregister_read_sock(drv->priv_socket);
619 close(drv->priv_socket);
620 }
621
622 if (drv->own_socket_path) {
623 unlink(drv->own_socket_path);
624 os_free(drv->own_socket_path);
625 }
626
627 if (drv->cmd_socket >= 0) {
628 eloop_unregister_read_sock(drv->cmd_socket);
629 close(drv->cmd_socket);
630 }
631
632 if (drv->own_cmd_path) {
633 unlink(drv->own_cmd_path);
634 os_free(drv->own_cmd_path);
635 }
636
637 os_free(drv);
638 }
639
640
wpa_driver_privsep_set_param(void * priv,const char * param)641 static int wpa_driver_privsep_set_param(void *priv, const char *param)
642 {
643 struct wpa_driver_privsep_data *drv = priv;
644 const char *pos;
645 char *own_dir, *priv_dir;
646 static unsigned int counter = 0;
647 size_t len;
648 struct sockaddr_un addr;
649
650 wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
651 if (param == NULL)
652 pos = NULL;
653 else
654 pos = os_strstr(param, "own_dir=");
655 if (pos) {
656 char *end;
657 own_dir = os_strdup(pos + 8);
658 if (own_dir == NULL)
659 return -1;
660 end = os_strchr(own_dir, ' ');
661 if (end)
662 *end = '\0';
663 } else {
664 own_dir = os_strdup("/tmp");
665 if (own_dir == NULL)
666 return -1;
667 }
668
669 if (param == NULL)
670 pos = NULL;
671 else
672 pos = os_strstr(param, "priv_dir=");
673 if (pos) {
674 char *end;
675 priv_dir = os_strdup(pos + 9);
676 if (priv_dir == NULL) {
677 os_free(own_dir);
678 return -1;
679 }
680 end = os_strchr(priv_dir, ' ');
681 if (end)
682 *end = '\0';
683 } else {
684 priv_dir = os_strdup("/var/run/wpa_priv");
685 if (priv_dir == NULL) {
686 os_free(own_dir);
687 return -1;
688 }
689 }
690
691 len = os_strlen(own_dir) + 50;
692 drv->own_socket_path = os_malloc(len);
693 if (drv->own_socket_path == NULL) {
694 os_free(priv_dir);
695 os_free(own_dir);
696 return -1;
697 }
698 os_snprintf(drv->own_socket_path, len, "%s/wpa_privsep-%d-%d",
699 own_dir, getpid(), counter++);
700
701 len = os_strlen(own_dir) + 50;
702 drv->own_cmd_path = os_malloc(len);
703 if (drv->own_cmd_path == NULL) {
704 os_free(drv->own_socket_path);
705 drv->own_socket_path = NULL;
706 os_free(priv_dir);
707 os_free(own_dir);
708 return -1;
709 }
710 os_snprintf(drv->own_cmd_path, len, "%s/wpa_privsep-%d-%d",
711 own_dir, getpid(), counter++);
712
713 os_free(own_dir);
714
715 drv->priv_addr.sun_family = AF_UNIX;
716 os_snprintf(drv->priv_addr.sun_path, sizeof(drv->priv_addr.sun_path),
717 "%s/%s", priv_dir, drv->ifname);
718 os_free(priv_dir);
719
720 drv->priv_socket = socket(PF_UNIX, SOCK_DGRAM, 0);
721 if (drv->priv_socket < 0) {
722 wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno));
723 os_free(drv->own_socket_path);
724 drv->own_socket_path = NULL;
725 return -1;
726 }
727
728 os_memset(&addr, 0, sizeof(addr));
729 addr.sun_family = AF_UNIX;
730 os_strlcpy(addr.sun_path, drv->own_socket_path, sizeof(addr.sun_path));
731 if (bind(drv->priv_socket, (struct sockaddr *) &addr, sizeof(addr)) <
732 0) {
733 wpa_printf(MSG_ERROR,
734 "privsep-set-params priv-sock: bind(PF_UNIX): %s",
735 strerror(errno));
736 close(drv->priv_socket);
737 drv->priv_socket = -1;
738 unlink(drv->own_socket_path);
739 os_free(drv->own_socket_path);
740 drv->own_socket_path = NULL;
741 return -1;
742 }
743
744 eloop_register_read_sock(drv->priv_socket, wpa_driver_privsep_receive,
745 drv, NULL);
746
747 drv->cmd_socket = socket(PF_UNIX, SOCK_DGRAM, 0);
748 if (drv->cmd_socket < 0) {
749 wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno));
750 os_free(drv->own_cmd_path);
751 drv->own_cmd_path = NULL;
752 return -1;
753 }
754
755 os_memset(&addr, 0, sizeof(addr));
756 addr.sun_family = AF_UNIX;
757 os_strlcpy(addr.sun_path, drv->own_cmd_path, sizeof(addr.sun_path));
758 if (bind(drv->cmd_socket, (struct sockaddr *) &addr, sizeof(addr)) < 0)
759 {
760 wpa_printf(MSG_ERROR,
761 "privsep-set-params cmd-sock: bind(PF_UNIX): %s",
762 strerror(errno));
763 close(drv->cmd_socket);
764 drv->cmd_socket = -1;
765 unlink(drv->own_cmd_path);
766 os_free(drv->own_cmd_path);
767 drv->own_cmd_path = NULL;
768 return -1;
769 }
770
771 if (wpa_priv_reg_cmd(drv, PRIVSEP_CMD_REGISTER) < 0) {
772 wpa_printf(MSG_ERROR, "Failed to register with wpa_priv");
773 return -1;
774 }
775
776 return 0;
777 }
778
779
wpa_driver_privsep_get_capa(void * priv,struct wpa_driver_capa * capa)780 static int wpa_driver_privsep_get_capa(void *priv,
781 struct wpa_driver_capa *capa)
782 {
783 struct wpa_driver_privsep_data *drv = priv;
784 int res;
785 size_t len = sizeof(*capa);
786
787 res = wpa_priv_cmd(drv, PRIVSEP_CMD_GET_CAPA, NULL, 0, capa, &len);
788 if (res < 0 || len != sizeof(*capa))
789 return -1;
790 /* For now, no support for passing extended_capa pointers */
791 capa->extended_capa = NULL;
792 capa->extended_capa_mask = NULL;
793 capa->extended_capa_len = 0;
794 return 0;
795 }
796
797
wpa_driver_privsep_get_mac_addr(void * priv)798 static const u8 * wpa_driver_privsep_get_mac_addr(void *priv)
799 {
800 struct wpa_driver_privsep_data *drv = priv;
801 wpa_printf(MSG_DEBUG, "%s", __func__);
802 return drv->own_addr;
803 }
804
805
wpa_driver_privsep_set_country(void * priv,const char * alpha2)806 static int wpa_driver_privsep_set_country(void *priv, const char *alpha2)
807 {
808 struct wpa_driver_privsep_data *drv = priv;
809 wpa_printf(MSG_DEBUG, "%s country='%s'", __func__, alpha2);
810 return wpa_priv_cmd(drv, PRIVSEP_CMD_SET_COUNTRY, alpha2,
811 os_strlen(alpha2), NULL, NULL);
812 }
813
814
815 struct wpa_driver_ops wpa_driver_privsep_ops = {
816 "privsep",
817 "wpa_supplicant privilege separated driver",
818 .get_bssid = wpa_driver_privsep_get_bssid,
819 .get_ssid = wpa_driver_privsep_get_ssid,
820 .set_key = wpa_driver_privsep_set_key,
821 .init = wpa_driver_privsep_init,
822 .deinit = wpa_driver_privsep_deinit,
823 .set_param = wpa_driver_privsep_set_param,
824 .scan2 = wpa_driver_privsep_scan,
825 .deauthenticate = wpa_driver_privsep_deauthenticate,
826 .authenticate = wpa_driver_privsep_authenticate,
827 .associate = wpa_driver_privsep_associate,
828 .get_capa = wpa_driver_privsep_get_capa,
829 .get_mac_addr = wpa_driver_privsep_get_mac_addr,
830 .get_scan_results2 = wpa_driver_privsep_get_scan_results2,
831 .set_country = wpa_driver_privsep_set_country,
832 };
833
834
835 const struct wpa_driver_ops *const wpa_drivers[] =
836 {
837 &wpa_driver_privsep_ops,
838 NULL
839 };
840