1 /*
2 * Wi-Fi Direct - P2P module
3 * Copyright (c) 2009-2010, Atheros Communications
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 "eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/ieee802_11_common.h"
15 #include "common/wpa_ctrl.h"
16 #include "crypto/sha256.h"
17 #include "crypto/crypto.h"
18 #include "wps/wps_i.h"
19 #include "p2p_i.h"
20 #include "p2p.h"
21
22
23 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
24 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
25 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
26 const u8 *sa, const u8 *data, size_t len,
27 int rx_freq);
28 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
29 const u8 *sa, const u8 *data,
30 size_t len);
31 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
32 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
33
34
35 /*
36 * p2p_scan recovery timeout
37 *
38 * Many drivers are using 30 second timeout on scan results. Allow a bit larger
39 * timeout for this to avoid hitting P2P timeout unnecessarily.
40 */
41 #define P2P_SCAN_TIMEOUT 35
42
43 /**
44 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
45 * entries will be removed
46 */
47 #ifndef P2P_PEER_EXPIRATION_AGE
48 #define P2P_PEER_EXPIRATION_AGE 60
49 #endif /* P2P_PEER_EXPIRATION_AGE */
50
51 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
52
p2p_expire_peers(struct p2p_data * p2p)53 static void p2p_expire_peers(struct p2p_data *p2p)
54 {
55 struct p2p_device *dev, *n;
56 struct os_reltime now;
57 size_t i;
58
59 os_get_reltime(&now);
60 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
61 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
62 continue;
63
64 if (dev == p2p->go_neg_peer) {
65 /*
66 * GO Negotiation is in progress with the peer, so
67 * don't expire the peer entry until GO Negotiation
68 * fails or times out.
69 */
70 continue;
71 }
72
73 if (p2p->cfg->go_connected &&
74 p2p->cfg->go_connected(p2p->cfg->cb_ctx,
75 dev->info.p2p_device_addr)) {
76 /*
77 * We are connected as a client to a group in which the
78 * peer is the GO, so do not expire the peer entry.
79 */
80 os_get_reltime(&dev->last_seen);
81 continue;
82 }
83
84 for (i = 0; i < p2p->num_groups; i++) {
85 if (p2p_group_is_client_connected(
86 p2p->groups[i], dev->info.p2p_device_addr))
87 break;
88 }
89 if (i < p2p->num_groups) {
90 /*
91 * The peer is connected as a client in a group where
92 * we are the GO, so do not expire the peer entry.
93 */
94 os_get_reltime(&dev->last_seen);
95 continue;
96 }
97
98 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
99 MAC2STR(dev->info.p2p_device_addr));
100 dl_list_del(&dev->list);
101 p2p_device_free(p2p, dev);
102 }
103 }
104
105
p2p_expiration_timeout(void * eloop_ctx,void * timeout_ctx)106 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
107 {
108 struct p2p_data *p2p = eloop_ctx;
109 p2p_expire_peers(p2p);
110 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
111 p2p_expiration_timeout, p2p, NULL);
112 }
113
114
p2p_state_txt(int state)115 static const char * p2p_state_txt(int state)
116 {
117 switch (state) {
118 case P2P_IDLE:
119 return "IDLE";
120 case P2P_SEARCH:
121 return "SEARCH";
122 case P2P_CONNECT:
123 return "CONNECT";
124 case P2P_CONNECT_LISTEN:
125 return "CONNECT_LISTEN";
126 case P2P_GO_NEG:
127 return "GO_NEG";
128 case P2P_LISTEN_ONLY:
129 return "LISTEN_ONLY";
130 case P2P_WAIT_PEER_CONNECT:
131 return "WAIT_PEER_CONNECT";
132 case P2P_WAIT_PEER_IDLE:
133 return "WAIT_PEER_IDLE";
134 case P2P_SD_DURING_FIND:
135 return "SD_DURING_FIND";
136 case P2P_PROVISIONING:
137 return "PROVISIONING";
138 case P2P_PD_DURING_FIND:
139 return "PD_DURING_FIND";
140 case P2P_INVITE:
141 return "INVITE";
142 case P2P_INVITE_LISTEN:
143 return "INVITE_LISTEN";
144 default:
145 return "?";
146 }
147 }
148
149
p2p_get_state_txt(struct p2p_data * p2p)150 const char * p2p_get_state_txt(struct p2p_data *p2p)
151 {
152 return p2p_state_txt(p2p->state);
153 }
154
155
p2p_get_p2ps_adv_list(struct p2p_data * p2p)156 struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p)
157 {
158 return p2p ? p2p->p2ps_adv_list : NULL;
159 }
160
161
p2p_set_intended_addr(struct p2p_data * p2p,const u8 * intended_addr)162 void p2p_set_intended_addr(struct p2p_data *p2p, const u8 *intended_addr)
163 {
164 if (p2p && intended_addr)
165 os_memcpy(p2p->intended_addr, intended_addr, ETH_ALEN);
166 }
167
168
p2p_get_provisioning_info(struct p2p_data * p2p,const u8 * addr)169 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
170 {
171 struct p2p_device *dev = NULL;
172
173 if (!addr || !p2p)
174 return 0;
175
176 dev = p2p_get_device(p2p, addr);
177 if (dev)
178 return dev->wps_prov_info;
179 else
180 return 0;
181 }
182
183
p2p_clear_provisioning_info(struct p2p_data * p2p,const u8 * addr)184 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
185 {
186 struct p2p_device *dev = NULL;
187
188 if (!addr || !p2p)
189 return;
190
191 dev = p2p_get_device(p2p, addr);
192 if (dev)
193 dev->wps_prov_info = 0;
194 }
195
196
p2p_set_state(struct p2p_data * p2p,int new_state)197 void p2p_set_state(struct p2p_data *p2p, int new_state)
198 {
199 p2p_dbg(p2p, "State %s -> %s",
200 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
201 p2p->state = new_state;
202
203 if (new_state == P2P_IDLE && p2p->pending_channel) {
204 p2p_dbg(p2p, "Apply change in listen channel");
205 p2p->cfg->reg_class = p2p->pending_reg_class;
206 p2p->cfg->channel = p2p->pending_channel;
207 p2p->pending_reg_class = 0;
208 p2p->pending_channel = 0;
209 }
210 }
211
212
p2p_set_timeout(struct p2p_data * p2p,unsigned int sec,unsigned int usec)213 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
214 {
215 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
216 p2p_state_txt(p2p->state), sec, usec);
217 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
218 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
219 }
220
221
p2p_clear_timeout(struct p2p_data * p2p)222 void p2p_clear_timeout(struct p2p_data *p2p)
223 {
224 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
225 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
226 }
227
228
p2p_go_neg_failed(struct p2p_data * p2p,int status)229 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
230 {
231 struct p2p_go_neg_results res;
232 struct p2p_device *peer = p2p->go_neg_peer;
233
234 if (!peer)
235 return;
236
237 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
238 if (p2p->state != P2P_SEARCH) {
239 /*
240 * Clear timeouts related to GO Negotiation if no new p2p_find
241 * has been started.
242 */
243 p2p_clear_timeout(p2p);
244 p2p_set_state(p2p, P2P_IDLE);
245 }
246
247 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
248 peer->wps_method = WPS_NOT_READY;
249 peer->oob_pw_id = 0;
250 wpabuf_free(peer->go_neg_conf);
251 peer->go_neg_conf = NULL;
252 p2p->go_neg_peer = NULL;
253
254 os_memset(&res, 0, sizeof(res));
255 res.status = status;
256 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
257 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
258 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
259 }
260
261
p2p_listen_in_find(struct p2p_data * p2p,int dev_disc)262 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
263 {
264 unsigned int r, tu;
265 int freq;
266 struct wpabuf *ies;
267
268 p2p_dbg(p2p, "Starting short listen state (state=%s)",
269 p2p_state_txt(p2p->state));
270
271 if (p2p->pending_listen_freq) {
272 /* We have a pending p2p_listen request */
273 p2p_dbg(p2p, "p2p_listen command pending already");
274 return;
275 }
276
277 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
278 if (freq < 0) {
279 p2p_dbg(p2p, "Unknown regulatory class/channel");
280 return;
281 }
282
283 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
284 r = 0;
285 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
286 p2p->min_disc_int) * 100;
287 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
288 tu = p2p->max_disc_tu;
289 if (!dev_disc && tu < 100)
290 tu = 100; /* Need to wait in non-device discovery use cases */
291 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
292 tu = p2p->cfg->max_listen * 1000 / 1024;
293
294 if (tu == 0) {
295 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
296 p2p_set_timeout(p2p, 0, 0);
297 return;
298 }
299
300 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
301 if (ies == NULL)
302 return;
303
304 p2p->pending_listen_freq = freq;
305 p2p->pending_listen_sec = 0;
306 p2p->pending_listen_usec = 1024 * tu;
307
308 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
309 ies) < 0) {
310 p2p_dbg(p2p, "Failed to start listen mode");
311 p2p->pending_listen_freq = 0;
312 }
313 wpabuf_free(ies);
314 }
315
316
p2p_listen(struct p2p_data * p2p,unsigned int timeout)317 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
318 {
319 int freq;
320 struct wpabuf *ies;
321
322 p2p_dbg(p2p, "Going to listen(only) state");
323
324 if (p2p->pending_listen_freq) {
325 /* We have a pending p2p_listen request */
326 p2p_dbg(p2p, "p2p_listen command pending already");
327 return -1;
328 }
329
330 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
331 if (freq < 0) {
332 p2p_dbg(p2p, "Unknown regulatory class/channel");
333 return -1;
334 }
335
336 p2p->pending_listen_sec = timeout / 1000;
337 p2p->pending_listen_usec = (timeout % 1000) * 1000;
338
339 if (p2p->p2p_scan_running) {
340 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
341 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
342 return 0;
343 }
344 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
345 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
346 return 0;
347 }
348
349 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
350 if (ies == NULL)
351 return -1;
352
353 p2p->pending_listen_freq = freq;
354
355 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
356 p2p_dbg(p2p, "Failed to start listen mode");
357 p2p->pending_listen_freq = 0;
358 wpabuf_free(ies);
359 return -1;
360 }
361 wpabuf_free(ies);
362
363 p2p_set_state(p2p, P2P_LISTEN_ONLY);
364
365 return 0;
366 }
367
368
p2p_device_clear_reported(struct p2p_data * p2p)369 static void p2p_device_clear_reported(struct p2p_data *p2p)
370 {
371 struct p2p_device *dev;
372 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
373 dev->flags &= ~P2P_DEV_REPORTED;
374 dev->sd_reqs = 0;
375 }
376 }
377
378
379 /**
380 * p2p_get_device - Fetch a peer entry
381 * @p2p: P2P module context from p2p_init()
382 * @addr: P2P Device Address of the peer
383 * Returns: Pointer to the device entry or %NULL if not found
384 */
p2p_get_device(struct p2p_data * p2p,const u8 * addr)385 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
386 {
387 struct p2p_device *dev;
388 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
389 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
390 return dev;
391 }
392 return NULL;
393 }
394
395
396 /**
397 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
398 * @p2p: P2P module context from p2p_init()
399 * @addr: P2P Interface Address of the peer
400 * Returns: Pointer to the device entry or %NULL if not found
401 */
p2p_get_device_interface(struct p2p_data * p2p,const u8 * addr)402 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
403 const u8 *addr)
404 {
405 struct p2p_device *dev;
406 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
407 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
408 return dev;
409 }
410 return NULL;
411 }
412
413
414 /**
415 * p2p_create_device - Create a peer entry
416 * @p2p: P2P module context from p2p_init()
417 * @addr: P2P Device Address of the peer
418 * Returns: Pointer to the device entry or %NULL on failure
419 *
420 * If there is already an entry for the peer, it will be returned instead of
421 * creating a new one.
422 */
p2p_create_device(struct p2p_data * p2p,const u8 * addr)423 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
424 const u8 *addr)
425 {
426 struct p2p_device *dev, *oldest = NULL;
427 size_t count = 0;
428
429 dev = p2p_get_device(p2p, addr);
430 if (dev)
431 return dev;
432
433 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
434 count++;
435 if (oldest == NULL ||
436 os_reltime_before(&dev->last_seen, &oldest->last_seen))
437 oldest = dev;
438 }
439 if (count + 1 > p2p->cfg->max_peers && oldest) {
440 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
441 dl_list_del(&oldest->list);
442 p2p_device_free(p2p, oldest);
443 }
444
445 dev = os_zalloc(sizeof(*dev));
446 if (dev == NULL)
447 return NULL;
448 dl_list_add(&p2p->devices, &dev->list);
449 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
450
451 return dev;
452 }
453
454
p2p_copy_client_info(struct p2p_device * dev,struct p2p_client_info * cli)455 static void p2p_copy_client_info(struct p2p_device *dev,
456 struct p2p_client_info *cli)
457 {
458 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
459 dev->info.device_name[cli->dev_name_len] = '\0';
460 dev->info.dev_capab = cli->dev_capab;
461 dev->info.config_methods = cli->config_methods;
462 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
463 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
464 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
465 dev->info.wps_sec_dev_type_list_len);
466 }
467
468
p2p_add_group_clients(struct p2p_data * p2p,const u8 * go_dev_addr,const u8 * go_interface_addr,int freq,const u8 * gi,size_t gi_len,struct os_reltime * rx_time)469 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
470 const u8 *go_interface_addr, int freq,
471 const u8 *gi, size_t gi_len,
472 struct os_reltime *rx_time)
473 {
474 struct p2p_group_info info;
475 size_t c;
476 struct p2p_device *dev;
477
478 if (gi == NULL)
479 return 0;
480
481 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
482 return -1;
483
484 /*
485 * Clear old data for this group; if the devices are still in the
486 * group, the information will be restored in the loop following this.
487 */
488 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
489 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
490 ETH_ALEN) == 0) {
491 os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
492 os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
493 }
494 }
495
496 for (c = 0; c < info.num_clients; c++) {
497 struct p2p_client_info *cli = &info.client[c];
498 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
499 ETH_ALEN) == 0)
500 continue; /* ignore our own entry */
501 dev = p2p_get_device(p2p, cli->p2p_device_addr);
502 if (dev) {
503 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
504 P2P_DEV_PROBE_REQ_ONLY)) {
505 /*
506 * Update information since we have not
507 * received this directly from the client.
508 */
509 p2p_copy_client_info(dev, cli);
510 } else {
511 /*
512 * Need to update P2P Client Discoverability
513 * flag since it is valid only in P2P Group
514 * Info attribute.
515 */
516 dev->info.dev_capab &=
517 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
518 dev->info.dev_capab |=
519 cli->dev_capab &
520 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
521 }
522 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
523 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
524 }
525 } else {
526 dev = p2p_create_device(p2p, cli->p2p_device_addr);
527 if (dev == NULL)
528 continue;
529 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
530 p2p_copy_client_info(dev, cli);
531 dev->oper_freq = freq;
532 p2p->cfg->dev_found(p2p->cfg->cb_ctx,
533 dev->info.p2p_device_addr,
534 &dev->info, 1);
535 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
536 }
537
538 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
539 ETH_ALEN);
540 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
541 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
542 os_memcpy(dev->member_in_go_iface, go_interface_addr,
543 ETH_ALEN);
544 dev->flags |= P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT;
545 }
546
547 return 0;
548 }
549
550
p2p_copy_wps_info(struct p2p_data * p2p,struct p2p_device * dev,int probe_req,const struct p2p_message * msg)551 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
552 int probe_req, const struct p2p_message *msg)
553 {
554 os_memcpy(dev->info.device_name, msg->device_name,
555 sizeof(dev->info.device_name));
556
557 if (msg->manufacturer &&
558 msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
559 os_memset(dev->info.manufacturer, 0,
560 sizeof(dev->info.manufacturer));
561 os_memcpy(dev->info.manufacturer, msg->manufacturer,
562 msg->manufacturer_len);
563 }
564
565 if (msg->model_name &&
566 msg->model_name_len < sizeof(dev->info.model_name)) {
567 os_memset(dev->info.model_name, 0,
568 sizeof(dev->info.model_name));
569 os_memcpy(dev->info.model_name, msg->model_name,
570 msg->model_name_len);
571 }
572
573 if (msg->model_number &&
574 msg->model_number_len < sizeof(dev->info.model_number)) {
575 os_memset(dev->info.model_number, 0,
576 sizeof(dev->info.model_number));
577 os_memcpy(dev->info.model_number, msg->model_number,
578 msg->model_number_len);
579 }
580
581 if (msg->serial_number &&
582 msg->serial_number_len < sizeof(dev->info.serial_number)) {
583 os_memset(dev->info.serial_number, 0,
584 sizeof(dev->info.serial_number));
585 os_memcpy(dev->info.serial_number, msg->serial_number,
586 msg->serial_number_len);
587 }
588
589 if (msg->pri_dev_type)
590 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
591 sizeof(dev->info.pri_dev_type));
592 else if (msg->wps_pri_dev_type)
593 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
594 sizeof(dev->info.pri_dev_type));
595
596 if (msg->wps_sec_dev_type_list) {
597 os_memcpy(dev->info.wps_sec_dev_type_list,
598 msg->wps_sec_dev_type_list,
599 msg->wps_sec_dev_type_list_len);
600 dev->info.wps_sec_dev_type_list_len =
601 msg->wps_sec_dev_type_list_len;
602 }
603
604 if (msg->capability) {
605 /*
606 * P2P Client Discoverability bit is reserved in all frames
607 * that use this function, so do not change its value here.
608 */
609 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
610 dev->info.dev_capab |= msg->capability[0] &
611 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
612 dev->info.group_capab = msg->capability[1];
613 }
614
615 if (msg->ext_listen_timing) {
616 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
617 dev->ext_listen_interval =
618 WPA_GET_LE16(msg->ext_listen_timing + 2);
619 }
620
621 if (!probe_req) {
622 u16 new_config_methods;
623 new_config_methods = msg->config_methods ?
624 msg->config_methods : msg->wps_config_methods;
625 if (new_config_methods &&
626 dev->info.config_methods != new_config_methods) {
627 p2p_dbg(p2p, "Update peer " MACSTR
628 " config_methods 0x%x -> 0x%x",
629 MAC2STR(dev->info.p2p_device_addr),
630 dev->info.config_methods,
631 new_config_methods);
632 dev->info.config_methods = new_config_methods;
633 }
634 }
635 }
636
637
p2p_update_peer_vendor_elems(struct p2p_device * dev,const u8 * ies,size_t ies_len)638 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
639 size_t ies_len)
640 {
641 const u8 *pos, *end;
642 u8 id, len;
643
644 wpabuf_free(dev->info.vendor_elems);
645 dev->info.vendor_elems = NULL;
646
647 end = ies + ies_len;
648
649 for (pos = ies; pos + 1 < end; pos += len) {
650 id = *pos++;
651 len = *pos++;
652
653 if (pos + len > end)
654 break;
655
656 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
657 continue;
658
659 if (len >= 4) {
660 u32 type = WPA_GET_BE32(pos);
661
662 if (type == WPA_IE_VENDOR_TYPE ||
663 type == WMM_IE_VENDOR_TYPE ||
664 type == WPS_IE_VENDOR_TYPE ||
665 type == P2P_IE_VENDOR_TYPE ||
666 type == WFD_IE_VENDOR_TYPE)
667 continue;
668 }
669
670 /* Unknown vendor element - make raw IE data available */
671 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
672 break;
673 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
674 }
675 }
676
677
p2p_compare_wfd_info(struct p2p_device * dev,const struct p2p_message * msg)678 static int p2p_compare_wfd_info(struct p2p_device *dev,
679 const struct p2p_message *msg)
680 {
681 if (dev->info.wfd_subelems && msg->wfd_subelems) {
682 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
683 return 1;
684
685 return os_memcmp(dev->info.wfd_subelems->buf,
686 msg->wfd_subelems->buf,
687 dev->info.wfd_subelems->used);
688 }
689 if (dev->info.wfd_subelems || msg->wfd_subelems)
690 return 1;
691
692 return 0;
693 }
694
695
696 /**
697 * p2p_add_device - Add peer entries based on scan results or P2P frames
698 * @p2p: P2P module context from p2p_init()
699 * @addr: Source address of Beacon or Probe Response frame (may be either
700 * P2P Device Address or P2P Interface Address)
701 * @level: Signal level (signal strength of the received frame from the peer)
702 * @freq: Frequency on which the Beacon or Probe Response frame was received
703 * @rx_time: Time when the result was received
704 * @ies: IEs from the Beacon or Probe Response frame
705 * @ies_len: Length of ies buffer in octets
706 * @scan_res: Whether this was based on scan results
707 * Returns: 0 on success, -1 on failure
708 *
709 * If the scan result is for a GO, the clients in the group will also be added
710 * to the peer table. This function can also be used with some other frames
711 * like Provision Discovery Request that contains P2P Capability and P2P Device
712 * Info attributes.
713 */
p2p_add_device(struct p2p_data * p2p,const u8 * addr,int freq,struct os_reltime * rx_time,int level,const u8 * ies,size_t ies_len,int scan_res)714 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
715 struct os_reltime *rx_time, int level, const u8 *ies,
716 size_t ies_len, int scan_res)
717 {
718 struct p2p_device *dev;
719 struct p2p_message msg;
720 const u8 *p2p_dev_addr;
721 int wfd_changed;
722 int i;
723 struct os_reltime time_now;
724
725 os_memset(&msg, 0, sizeof(msg));
726 if (p2p_parse_ies(ies, ies_len, &msg)) {
727 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
728 p2p_parse_free(&msg);
729 return -1;
730 }
731
732 if (msg.p2p_device_addr)
733 p2p_dev_addr = msg.p2p_device_addr;
734 else if (msg.device_id)
735 p2p_dev_addr = msg.device_id;
736 else {
737 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
738 p2p_parse_free(&msg);
739 return -1;
740 }
741
742 if (!is_zero_ether_addr(p2p->peer_filter) &&
743 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
744 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
745 " due to peer filter", MAC2STR(p2p_dev_addr));
746 p2p_parse_free(&msg);
747 return 0;
748 }
749
750 dev = p2p_create_device(p2p, p2p_dev_addr);
751 if (dev == NULL) {
752 p2p_parse_free(&msg);
753 return -1;
754 }
755
756 if (rx_time == NULL) {
757 os_get_reltime(&time_now);
758 rx_time = &time_now;
759 }
760
761 /*
762 * Update the device entry only if the new peer
763 * entry is newer than the one previously stored, or if
764 * the device was previously seen as a P2P Client in a group
765 * and the new entry isn't older than a threshold.
766 */
767 if (dev->last_seen.sec > 0 &&
768 os_reltime_before(rx_time, &dev->last_seen) &&
769 (!(dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT) ||
770 os_reltime_expired(&dev->last_seen, rx_time,
771 P2P_DEV_GROUP_CLIENT_RESP_THRESHOLD))) {
772 p2p_dbg(p2p,
773 "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u flags=0x%x)",
774 (unsigned int) rx_time->sec,
775 (unsigned int) rx_time->usec,
776 (unsigned int) dev->last_seen.sec,
777 (unsigned int) dev->last_seen.usec,
778 dev->flags);
779 p2p_parse_free(&msg);
780 return -1;
781 }
782
783 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
784
785 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY |
786 P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT);
787
788 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
789 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
790 if (msg.ssid &&
791 msg.ssid[1] <= sizeof(dev->oper_ssid) &&
792 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
793 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
794 != 0)) {
795 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
796 dev->oper_ssid_len = msg.ssid[1];
797 }
798
799 if (msg.adv_service_instance && msg.adv_service_instance_len) {
800 wpabuf_free(dev->info.p2ps_instance);
801 dev->info.p2ps_instance = wpabuf_alloc_copy(
802 msg.adv_service_instance, msg.adv_service_instance_len);
803 }
804
805 if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
806 *msg.ds_params >= 1 && *msg.ds_params <= 14) {
807 int ds_freq;
808 if (*msg.ds_params == 14)
809 ds_freq = 2484;
810 else
811 ds_freq = 2407 + *msg.ds_params * 5;
812 if (freq != ds_freq) {
813 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
814 freq, ds_freq);
815 freq = ds_freq;
816 }
817 }
818
819 if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
820 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
821 MACSTR " %d -> %d MHz (DS param %d)",
822 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
823 freq, msg.ds_params ? *msg.ds_params : -1);
824 }
825 if (scan_res) {
826 dev->listen_freq = freq;
827 if (msg.group_info)
828 dev->oper_freq = freq;
829 }
830 dev->info.level = level;
831
832 p2p_copy_wps_info(p2p, dev, 0, &msg);
833
834 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
835 wpabuf_free(dev->info.wps_vendor_ext[i]);
836 dev->info.wps_vendor_ext[i] = NULL;
837 }
838
839 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
840 if (msg.wps_vendor_ext[i] == NULL)
841 break;
842 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
843 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
844 if (dev->info.wps_vendor_ext[i] == NULL)
845 break;
846 }
847
848 wfd_changed = p2p_compare_wfd_info(dev, &msg);
849
850 if (msg.wfd_subelems) {
851 wpabuf_free(dev->info.wfd_subelems);
852 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
853 }
854
855 if (scan_res) {
856 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
857 msg.group_info, msg.group_info_len,
858 rx_time);
859 }
860
861 p2p_parse_free(&msg);
862
863 p2p_update_peer_vendor_elems(dev, ies, ies_len);
864
865 if (dev->flags & P2P_DEV_REPORTED && !wfd_changed &&
866 (!msg.adv_service_instance ||
867 (dev->flags & P2P_DEV_P2PS_REPORTED)))
868 return 0;
869
870 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
871 freq, (unsigned int) rx_time->sec,
872 (unsigned int) rx_time->usec);
873 if (dev->flags & P2P_DEV_USER_REJECTED) {
874 p2p_dbg(p2p, "Do not report rejected device");
875 return 0;
876 }
877
878 if (dev->info.config_methods == 0 &&
879 (freq == 2412 || freq == 2437 || freq == 2462)) {
880 /*
881 * If we have only seen a Beacon frame from a GO, we do not yet
882 * know what WPS config methods it supports. Since some
883 * applications use config_methods value from P2P-DEVICE-FOUND
884 * events, postpone reporting this peer until we've fully
885 * discovered its capabilities.
886 *
887 * At least for now, do this only if the peer was detected on
888 * one of the social channels since that peer can be easily be
889 * found again and there are no limitations of having to use
890 * passive scan on this channels, so this can be done through
891 * Probe Response frame that includes the config_methods
892 * information.
893 */
894 p2p_dbg(p2p, "Do not report peer " MACSTR
895 " with unknown config methods", MAC2STR(addr));
896 return 0;
897 }
898
899 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
900 !(dev->flags & P2P_DEV_REPORTED_ONCE));
901 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
902
903 if (msg.adv_service_instance)
904 dev->flags |= P2P_DEV_P2PS_REPORTED;
905
906 return 0;
907 }
908
909
p2p_device_free(struct p2p_data * p2p,struct p2p_device * dev)910 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
911 {
912 int i;
913
914 if (p2p->go_neg_peer == dev) {
915 /*
916 * If GO Negotiation is in progress, report that it has failed.
917 */
918 p2p_go_neg_failed(p2p, -1);
919 }
920 if (p2p->invite_peer == dev)
921 p2p->invite_peer = NULL;
922 if (p2p->sd_peer == dev)
923 p2p->sd_peer = NULL;
924 if (p2p->pending_client_disc_go == dev)
925 p2p->pending_client_disc_go = NULL;
926
927 /* dev_lost() device, but only if it was previously dev_found() */
928 if (dev->flags & P2P_DEV_REPORTED_ONCE)
929 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
930 dev->info.p2p_device_addr);
931
932 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
933 wpabuf_free(dev->info.wps_vendor_ext[i]);
934 dev->info.wps_vendor_ext[i] = NULL;
935 }
936
937 wpabuf_free(dev->info.wfd_subelems);
938 wpabuf_free(dev->info.vendor_elems);
939 wpabuf_free(dev->go_neg_conf);
940 wpabuf_free(dev->info.p2ps_instance);
941
942 os_free(dev);
943 }
944
945
p2p_get_next_prog_freq(struct p2p_data * p2p)946 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
947 {
948 struct p2p_channels *c;
949 struct p2p_reg_class *cla;
950 size_t cl, ch;
951 int found = 0;
952 u8 reg_class;
953 u8 channel;
954 int freq;
955
956 c = &p2p->cfg->channels;
957 for (cl = 0; cl < c->reg_classes; cl++) {
958 cla = &c->reg_class[cl];
959 if (cla->reg_class != p2p->last_prog_scan_class)
960 continue;
961 for (ch = 0; ch < cla->channels; ch++) {
962 if (cla->channel[ch] == p2p->last_prog_scan_chan) {
963 found = 1;
964 break;
965 }
966 }
967 if (found)
968 break;
969 }
970
971 if (!found) {
972 /* Start from beginning */
973 reg_class = c->reg_class[0].reg_class;
974 channel = c->reg_class[0].channel[0];
975 } else {
976 /* Pick the next channel */
977 ch++;
978 if (ch == cla->channels) {
979 cl++;
980 if (cl == c->reg_classes)
981 cl = 0;
982 ch = 0;
983 }
984 reg_class = c->reg_class[cl].reg_class;
985 channel = c->reg_class[cl].channel[ch];
986 }
987
988 freq = p2p_channel_to_freq(reg_class, channel);
989 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
990 reg_class, channel, freq);
991 p2p->last_prog_scan_class = reg_class;
992 p2p->last_prog_scan_chan = channel;
993
994 if (freq == 2412 || freq == 2437 || freq == 2462)
995 return 0; /* No need to add social channels */
996 return freq;
997 }
998
999
p2p_search(struct p2p_data * p2p)1000 static void p2p_search(struct p2p_data *p2p)
1001 {
1002 int freq = 0;
1003 enum p2p_scan_type type;
1004 u16 pw_id = DEV_PW_DEFAULT;
1005 int res;
1006
1007 if (p2p->drv_in_listen) {
1008 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
1009 return;
1010 }
1011 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1012
1013 if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
1014 (freq = p2p_get_next_prog_freq(p2p)) > 0) {
1015 type = P2P_SCAN_SOCIAL_PLUS_ONE;
1016 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
1017 } else {
1018 type = P2P_SCAN_SOCIAL;
1019 p2p_dbg(p2p, "Starting search");
1020 }
1021
1022 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
1023 p2p->num_req_dev_types, p2p->req_dev_types,
1024 p2p->find_dev_id, pw_id);
1025 if (res < 0) {
1026 p2p_dbg(p2p, "Scan request schedule failed");
1027 p2p_continue_find(p2p);
1028 }
1029 }
1030
1031
p2p_find_timeout(void * eloop_ctx,void * timeout_ctx)1032 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
1033 {
1034 struct p2p_data *p2p = eloop_ctx;
1035 p2p_dbg(p2p, "Find timeout -> stop");
1036 p2p_stop_find(p2p);
1037 }
1038
1039
p2p_notify_scan_trigger_status(struct p2p_data * p2p,int status)1040 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
1041 {
1042 if (status != 0) {
1043 p2p_dbg(p2p, "Scan request failed");
1044 /* Do continue find even for the first p2p_find_scan */
1045 p2p_continue_find(p2p);
1046 } else {
1047 p2p_dbg(p2p, "Running p2p_scan");
1048 p2p->p2p_scan_running = 1;
1049 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1050 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1051 p2p, NULL);
1052 }
1053 }
1054
1055
p2p_run_after_scan(struct p2p_data * p2p)1056 static int p2p_run_after_scan(struct p2p_data *p2p)
1057 {
1058 struct p2p_device *dev;
1059 enum p2p_after_scan op;
1060
1061 if (p2p->after_scan_tx) {
1062 p2p->after_scan_tx_in_progress = 1;
1063 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1064 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1065 p2p->after_scan_tx->freq,
1066 p2p->after_scan_tx->dst,
1067 p2p->after_scan_tx->src,
1068 p2p->after_scan_tx->bssid,
1069 (u8 *) (p2p->after_scan_tx + 1),
1070 p2p->after_scan_tx->len,
1071 p2p->after_scan_tx->wait_time);
1072 os_free(p2p->after_scan_tx);
1073 p2p->after_scan_tx = NULL;
1074 return 1;
1075 }
1076
1077 op = p2p->start_after_scan;
1078 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1079 switch (op) {
1080 case P2P_AFTER_SCAN_NOTHING:
1081 break;
1082 case P2P_AFTER_SCAN_LISTEN:
1083 p2p_dbg(p2p, "Start previously requested Listen state");
1084 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1085 p2p->pending_listen_usec / 1000);
1086 return 1;
1087 case P2P_AFTER_SCAN_CONNECT:
1088 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1089 MAC2STR(p2p->after_scan_peer));
1090 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1091 if (dev == NULL) {
1092 p2p_dbg(p2p, "Peer not known anymore");
1093 break;
1094 }
1095 p2p_connect_send(p2p, dev);
1096 return 1;
1097 }
1098
1099 return 0;
1100 }
1101
1102
p2p_scan_timeout(void * eloop_ctx,void * timeout_ctx)1103 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1104 {
1105 struct p2p_data *p2p = eloop_ctx;
1106 int running;
1107 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1108 running = p2p->p2p_scan_running;
1109 /* Make sure we recover from missed scan results callback */
1110 p2p->p2p_scan_running = 0;
1111
1112 if (running)
1113 p2p_run_after_scan(p2p);
1114 }
1115
1116
p2p_free_req_dev_types(struct p2p_data * p2p)1117 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1118 {
1119 p2p->num_req_dev_types = 0;
1120 os_free(p2p->req_dev_types);
1121 p2p->req_dev_types = NULL;
1122 }
1123
1124
p2ps_gen_hash(struct p2p_data * p2p,const char * str,u8 * hash)1125 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash)
1126 {
1127 u8 buf[SHA256_MAC_LEN];
1128 char str_buf[256];
1129 const u8 *adv_array;
1130 size_t i, adv_len;
1131
1132 if (!str || !hash)
1133 return 0;
1134
1135 if (!str[0]) {
1136 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1137 return 1;
1138 }
1139
1140 adv_array = (u8 *) str_buf;
1141 adv_len = os_strlen(str);
1142 if (adv_len >= sizeof(str_buf))
1143 return 0;
1144
1145 for (i = 0; str[i] && i < adv_len; i++) {
1146 if (str[i] >= 'A' && str[i] <= 'Z')
1147 str_buf[i] = str[i] - 'A' + 'a';
1148 else
1149 str_buf[i] = str[i];
1150 }
1151
1152 if (sha256_vector(1, &adv_array, &adv_len, buf))
1153 return 0;
1154
1155 os_memcpy(hash, buf, P2PS_HASH_LEN);
1156 return 1;
1157 }
1158
1159
p2p_find(struct p2p_data * p2p,unsigned int timeout,enum p2p_discovery_type type,unsigned int num_req_dev_types,const u8 * req_dev_types,const u8 * dev_id,unsigned int search_delay,u8 seek_count,const char ** seek,int freq)1160 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1161 enum p2p_discovery_type type,
1162 unsigned int num_req_dev_types, const u8 *req_dev_types,
1163 const u8 *dev_id, unsigned int search_delay,
1164 u8 seek_count, const char **seek, int freq)
1165 {
1166 int res;
1167
1168 p2p_dbg(p2p, "Starting find (type=%d)", type);
1169 os_get_reltime(&p2p->find_start);
1170 if (p2p->p2p_scan_running) {
1171 p2p_dbg(p2p, "p2p_scan is already running");
1172 }
1173
1174 p2p_free_req_dev_types(p2p);
1175 if (req_dev_types && num_req_dev_types) {
1176 p2p->req_dev_types = os_malloc(num_req_dev_types *
1177 WPS_DEV_TYPE_LEN);
1178 if (p2p->req_dev_types == NULL)
1179 return -1;
1180 os_memcpy(p2p->req_dev_types, req_dev_types,
1181 num_req_dev_types * WPS_DEV_TYPE_LEN);
1182 p2p->num_req_dev_types = num_req_dev_types;
1183 }
1184
1185 if (dev_id) {
1186 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1187 p2p->find_dev_id = p2p->find_dev_id_buf;
1188 } else
1189 p2p->find_dev_id = NULL;
1190
1191 if (seek_count == 0 || !seek) {
1192 /* Not an ASP search */
1193 p2p->p2ps_seek = 0;
1194 } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) {
1195 /*
1196 * An empty seek string means no hash values, but still an ASP
1197 * search.
1198 */
1199 p2p_dbg(p2p, "ASP search");
1200 p2p->p2ps_seek_count = 0;
1201 p2p->p2ps_seek = 1;
1202 } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
1203 u8 buf[P2PS_HASH_LEN];
1204 int i, count = 0;
1205
1206 for (i = 0; i < seek_count; i++) {
1207 if (!p2ps_gen_hash(p2p, seek[i], buf))
1208 continue;
1209
1210 p2p_dbg(p2p, "Seek service %s hash " MACSTR,
1211 seek[i], MAC2STR(buf));
1212 os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN],
1213 buf, P2PS_HASH_LEN);
1214 count++;
1215 }
1216
1217 p2p->p2ps_seek_count = count;
1218 p2p->p2ps_seek = 1;
1219 } else {
1220 p2p->p2ps_seek_count = 0;
1221 p2p->p2ps_seek = 1;
1222 }
1223
1224 /* Special case to perform wildcard search */
1225 if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
1226 p2p->p2ps_seek_count = 1;
1227 os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash,
1228 P2PS_HASH_LEN);
1229 }
1230
1231 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1232 p2p_clear_timeout(p2p);
1233 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1234 p2p->find_type = type;
1235 p2p_device_clear_reported(p2p);
1236 p2p_set_state(p2p, P2P_SEARCH);
1237 p2p->search_delay = search_delay;
1238 p2p->in_search_delay = 0;
1239 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1240 p2p->last_p2p_find_timeout = timeout;
1241 if (timeout)
1242 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1243 p2p, NULL);
1244 switch (type) {
1245 case P2P_FIND_START_WITH_FULL:
1246 if (freq > 0) {
1247 /*
1248 * Start with the specified channel and then move to
1249 * social channels only scans.
1250 */
1251 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx,
1252 P2P_SCAN_SPECIFIC, freq,
1253 p2p->num_req_dev_types,
1254 p2p->req_dev_types, dev_id,
1255 DEV_PW_DEFAULT);
1256 break;
1257 }
1258 /* fall through */
1259 case P2P_FIND_PROGRESSIVE:
1260 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1261 p2p->num_req_dev_types,
1262 p2p->req_dev_types, dev_id,
1263 DEV_PW_DEFAULT);
1264 break;
1265 case P2P_FIND_ONLY_SOCIAL:
1266 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1267 p2p->num_req_dev_types,
1268 p2p->req_dev_types, dev_id,
1269 DEV_PW_DEFAULT);
1270 break;
1271 default:
1272 return -1;
1273 }
1274
1275 if (res != 0 && p2p->p2p_scan_running) {
1276 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1277 /* wait for the previous p2p_scan to complete */
1278 res = 0; /* do not report failure */
1279 } else if (res != 0) {
1280 p2p_dbg(p2p, "Failed to start p2p_scan");
1281 p2p_set_state(p2p, P2P_IDLE);
1282 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1283 }
1284
1285 return res;
1286 }
1287
1288
p2p_stop_find_for_freq(struct p2p_data * p2p,int freq)1289 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1290 {
1291 p2p_dbg(p2p, "Stopping find");
1292 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1293 p2p_clear_timeout(p2p);
1294 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
1295 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1296
1297 p2p->p2ps_seek_count = 0;
1298
1299 p2p_set_state(p2p, P2P_IDLE);
1300 p2p_free_req_dev_types(p2p);
1301 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1302 if (p2p->go_neg_peer)
1303 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1304 p2p->go_neg_peer = NULL;
1305 p2p->sd_peer = NULL;
1306 p2p->invite_peer = NULL;
1307 p2p_stop_listen_for_freq(p2p, freq);
1308 p2p->send_action_in_progress = 0;
1309 }
1310
1311
p2p_stop_listen_for_freq(struct p2p_data * p2p,int freq)1312 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1313 {
1314 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1315 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1316 return;
1317 }
1318 if (p2p->in_listen) {
1319 p2p->in_listen = 0;
1320 p2p_clear_timeout(p2p);
1321 }
1322 if (p2p->drv_in_listen) {
1323 /*
1324 * The driver may not deliver callback to p2p_listen_end()
1325 * when the operation gets canceled, so clear the internal
1326 * variable that is tracking driver state.
1327 */
1328 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1329 p2p->drv_in_listen = 0;
1330 }
1331 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1332 }
1333
1334
p2p_stop_listen(struct p2p_data * p2p)1335 void p2p_stop_listen(struct p2p_data *p2p)
1336 {
1337 if (p2p->state != P2P_LISTEN_ONLY) {
1338 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1339 return;
1340 }
1341
1342 p2p_stop_listen_for_freq(p2p, 0);
1343 p2p_set_state(p2p, P2P_IDLE);
1344 }
1345
1346
p2p_stop_find(struct p2p_data * p2p)1347 void p2p_stop_find(struct p2p_data *p2p)
1348 {
1349 p2p->pending_listen_freq = 0;
1350 p2p_stop_find_for_freq(p2p, 0);
1351 }
1352
1353
p2p_prepare_channel_pref(struct p2p_data * p2p,unsigned int force_freq,unsigned int pref_freq,int go)1354 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1355 unsigned int force_freq,
1356 unsigned int pref_freq, int go)
1357 {
1358 u8 op_class, op_channel;
1359 unsigned int freq = force_freq ? force_freq : pref_freq;
1360
1361 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1362 force_freq, pref_freq, go);
1363 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1364 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1365 return -1;
1366 }
1367
1368 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1369 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1370 op_channel))) {
1371 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1372 freq, op_class, op_channel);
1373 return -1;
1374 }
1375
1376 p2p->op_reg_class = op_class;
1377 p2p->op_channel = op_channel;
1378
1379 if (force_freq) {
1380 p2p->channels.reg_classes = 1;
1381 p2p->channels.reg_class[0].channels = 1;
1382 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1383 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1384 } else {
1385 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1386 sizeof(struct p2p_channels));
1387 }
1388
1389 return 0;
1390 }
1391
1392
p2p_prepare_channel_best(struct p2p_data * p2p)1393 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1394 {
1395 u8 op_class, op_channel;
1396 const int op_classes_5ghz[] = { 124, 125, 115, 0 };
1397 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1398 const int op_classes_vht[] = { 128, 0 };
1399
1400 p2p_dbg(p2p, "Prepare channel best");
1401
1402 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1403 p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1404 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1405 == 0) {
1406 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1407 p2p->op_reg_class = op_class;
1408 p2p->op_channel = op_channel;
1409 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1410 p2p_supported_freq(p2p, p2p->best_freq_5) &&
1411 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1412 == 0) {
1413 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1414 p2p->op_reg_class = op_class;
1415 p2p->op_channel = op_channel;
1416 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1417 p2p_supported_freq(p2p, p2p->best_freq_24) &&
1418 p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1419 &op_channel) == 0) {
1420 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1421 p2p->op_reg_class = op_class;
1422 p2p->op_channel = op_channel;
1423 } else if (p2p->cfg->num_pref_chan > 0 &&
1424 p2p_channels_includes(&p2p->cfg->channels,
1425 p2p->cfg->pref_chan[0].op_class,
1426 p2p->cfg->pref_chan[0].chan)) {
1427 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1428 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1429 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1430 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1431 &p2p->op_reg_class, &p2p->op_channel) ==
1432 0) {
1433 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1434 p2p->op_reg_class, p2p->op_channel);
1435 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1436 &p2p->op_reg_class, &p2p->op_channel) ==
1437 0) {
1438 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1439 p2p->op_reg_class, p2p->op_channel);
1440 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1441 &p2p->op_reg_class, &p2p->op_channel) ==
1442 0) {
1443 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1444 p2p->op_reg_class, p2p->op_channel);
1445 } else if (p2p_channels_includes(&p2p->cfg->channels,
1446 p2p->cfg->op_reg_class,
1447 p2p->cfg->op_channel)) {
1448 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1449 p2p->op_reg_class = p2p->cfg->op_reg_class;
1450 p2p->op_channel = p2p->cfg->op_channel;
1451 } else if (p2p_channel_random_social(&p2p->cfg->channels,
1452 &p2p->op_reg_class,
1453 &p2p->op_channel) == 0) {
1454 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1455 p2p->op_reg_class, p2p->op_channel);
1456 } else {
1457 /* Select any random available channel from the first available
1458 * operating class */
1459 p2p_channel_select(&p2p->cfg->channels, NULL,
1460 &p2p->op_reg_class,
1461 &p2p->op_channel);
1462 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1463 p2p->op_channel, p2p->op_reg_class);
1464 }
1465
1466 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1467 sizeof(struct p2p_channels));
1468 }
1469
1470
1471 /**
1472 * p2p_prepare_channel - Select operating channel for GO Negotiation
1473 * @p2p: P2P module context from p2p_init()
1474 * @dev: Selected peer device
1475 * @force_freq: Forced frequency in MHz or 0 if not forced
1476 * @pref_freq: Preferred frequency in MHz or 0 if no preference
1477 * @go: Whether the local end will be forced to be GO
1478 * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1479 *
1480 * This function is used to do initial operating channel selection for GO
1481 * Negotiation prior to having received peer information. The selected channel
1482 * may be further optimized in p2p_reselect_channel() once the peer information
1483 * is available.
1484 */
p2p_prepare_channel(struct p2p_data * p2p,struct p2p_device * dev,unsigned int force_freq,unsigned int pref_freq,int go)1485 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1486 unsigned int force_freq, unsigned int pref_freq, int go)
1487 {
1488 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1489 force_freq, pref_freq, go);
1490 if (force_freq || pref_freq) {
1491 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1492 0)
1493 return -1;
1494 } else {
1495 p2p_prepare_channel_best(p2p);
1496 }
1497 p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1498 if (go)
1499 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1500 else if (!force_freq)
1501 p2p_channels_union_inplace(&p2p->channels,
1502 &p2p->cfg->cli_channels);
1503 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1504
1505 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1506 p2p->op_reg_class, p2p->op_channel,
1507 force_freq ? " (forced)" : "");
1508
1509 if (force_freq)
1510 dev->flags |= P2P_DEV_FORCE_FREQ;
1511 else
1512 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1513
1514 return 0;
1515 }
1516
1517
p2p_set_dev_persistent(struct p2p_device * dev,int persistent_group)1518 static void p2p_set_dev_persistent(struct p2p_device *dev,
1519 int persistent_group)
1520 {
1521 switch (persistent_group) {
1522 case 0:
1523 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1524 P2P_DEV_PREFER_PERSISTENT_RECONN);
1525 break;
1526 case 1:
1527 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1528 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1529 break;
1530 case 2:
1531 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1532 P2P_DEV_PREFER_PERSISTENT_RECONN;
1533 break;
1534 }
1535 }
1536
1537
p2p_connect(struct p2p_data * p2p,const u8 * peer_addr,enum p2p_wps_method wps_method,int go_intent,const u8 * own_interface_addr,unsigned int force_freq,int persistent_group,const u8 * force_ssid,size_t force_ssid_len,int pd_before_go_neg,unsigned int pref_freq,u16 oob_pw_id)1538 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1539 enum p2p_wps_method wps_method,
1540 int go_intent, const u8 *own_interface_addr,
1541 unsigned int force_freq, int persistent_group,
1542 const u8 *force_ssid, size_t force_ssid_len,
1543 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1544 {
1545 struct p2p_device *dev;
1546
1547 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1548 " GO Intent=%d Intended Interface Address=" MACSTR
1549 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1550 "oob_pw_id=%u",
1551 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1552 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1553
1554 dev = p2p_get_device(p2p, peer_addr);
1555 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1556 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1557 MAC2STR(peer_addr));
1558 return -1;
1559 }
1560
1561 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1562 go_intent == 15) < 0)
1563 return -1;
1564
1565 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1566 if (!(dev->info.dev_capab &
1567 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1568 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1569 " that is in a group and is not discoverable",
1570 MAC2STR(peer_addr));
1571 return -1;
1572 }
1573 if (dev->oper_freq <= 0) {
1574 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1575 " with incomplete information",
1576 MAC2STR(peer_addr));
1577 return -1;
1578 }
1579
1580 /*
1581 * First, try to connect directly. If the peer does not
1582 * acknowledge frames, assume it is sleeping and use device
1583 * discoverability via the GO at that point.
1584 */
1585 }
1586
1587 p2p->ssid_set = 0;
1588 if (force_ssid) {
1589 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1590 force_ssid, force_ssid_len);
1591 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1592 p2p->ssid_len = force_ssid_len;
1593 p2p->ssid_set = 1;
1594 }
1595
1596 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1597 dev->flags &= ~P2P_DEV_USER_REJECTED;
1598 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1599 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1600 if (pd_before_go_neg)
1601 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1602 else {
1603 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1604 /*
1605 * Assign dialog token and tie breaker here to use the same
1606 * values in each retry within the same GO Negotiation exchange.
1607 */
1608 dev->dialog_token++;
1609 if (dev->dialog_token == 0)
1610 dev->dialog_token = 1;
1611 dev->tie_breaker = p2p->next_tie_breaker;
1612 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1613 }
1614 dev->connect_reqs = 0;
1615 dev->go_neg_req_sent = 0;
1616 dev->go_state = UNKNOWN_GO;
1617 p2p_set_dev_persistent(dev, persistent_group);
1618 p2p->go_intent = go_intent;
1619 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1620
1621 if (p2p->state != P2P_IDLE)
1622 p2p_stop_find(p2p);
1623
1624 if (p2p->after_scan_tx) {
1625 /*
1626 * We need to drop the pending frame to avoid issues with the
1627 * new GO Negotiation, e.g., when the pending frame was from a
1628 * previous attempt at starting a GO Negotiation.
1629 */
1630 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1631 os_free(p2p->after_scan_tx);
1632 p2p->after_scan_tx = NULL;
1633 }
1634
1635 dev->wps_method = wps_method;
1636 dev->oob_pw_id = oob_pw_id;
1637 dev->status = P2P_SC_SUCCESS;
1638
1639 if (p2p->p2p_scan_running) {
1640 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1641 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1642 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1643 return 0;
1644 }
1645 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1646
1647 return p2p_connect_send(p2p, dev);
1648 }
1649
1650
p2p_authorize(struct p2p_data * p2p,const u8 * peer_addr,enum p2p_wps_method wps_method,int go_intent,const u8 * own_interface_addr,unsigned int force_freq,int persistent_group,const u8 * force_ssid,size_t force_ssid_len,unsigned int pref_freq,u16 oob_pw_id)1651 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1652 enum p2p_wps_method wps_method,
1653 int go_intent, const u8 *own_interface_addr,
1654 unsigned int force_freq, int persistent_group,
1655 const u8 *force_ssid, size_t force_ssid_len,
1656 unsigned int pref_freq, u16 oob_pw_id)
1657 {
1658 struct p2p_device *dev;
1659
1660 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1661 " GO Intent=%d Intended Interface Address=" MACSTR
1662 " wps_method=%d persistent_group=%d oob_pw_id=%u",
1663 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1664 wps_method, persistent_group, oob_pw_id);
1665
1666 dev = p2p_get_device(p2p, peer_addr);
1667 if (dev == NULL) {
1668 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1669 MAC2STR(peer_addr));
1670 return -1;
1671 }
1672
1673 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1674 15) < 0)
1675 return -1;
1676
1677 p2p->ssid_set = 0;
1678 if (force_ssid) {
1679 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1680 force_ssid, force_ssid_len);
1681 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1682 p2p->ssid_len = force_ssid_len;
1683 p2p->ssid_set = 1;
1684 }
1685
1686 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1687 dev->flags &= ~P2P_DEV_USER_REJECTED;
1688 dev->go_neg_req_sent = 0;
1689 dev->go_state = UNKNOWN_GO;
1690 p2p_set_dev_persistent(dev, persistent_group);
1691 p2p->go_intent = go_intent;
1692 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1693
1694 dev->wps_method = wps_method;
1695 dev->oob_pw_id = oob_pw_id;
1696 dev->status = P2P_SC_SUCCESS;
1697
1698 return 0;
1699 }
1700
1701
p2p_add_dev_info(struct p2p_data * p2p,const u8 * addr,struct p2p_device * dev,struct p2p_message * msg)1702 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1703 struct p2p_device *dev, struct p2p_message *msg)
1704 {
1705 os_get_reltime(&dev->last_seen);
1706
1707 p2p_copy_wps_info(p2p, dev, 0, msg);
1708
1709 if (msg->listen_channel) {
1710 int freq;
1711 freq = p2p_channel_to_freq(msg->listen_channel[3],
1712 msg->listen_channel[4]);
1713 if (freq < 0) {
1714 p2p_dbg(p2p, "Unknown peer Listen channel: "
1715 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1716 msg->listen_channel[0],
1717 msg->listen_channel[1],
1718 msg->listen_channel[2],
1719 msg->listen_channel[3],
1720 msg->listen_channel[4]);
1721 } else {
1722 p2p_dbg(p2p, "Update peer " MACSTR
1723 " Listen channel: %u -> %u MHz",
1724 MAC2STR(dev->info.p2p_device_addr),
1725 dev->listen_freq, freq);
1726 dev->listen_freq = freq;
1727 }
1728 }
1729
1730 if (msg->wfd_subelems) {
1731 wpabuf_free(dev->info.wfd_subelems);
1732 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1733 }
1734
1735 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1736 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1737 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1738 } else {
1739 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1740 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1741 "listen_freq=%d",
1742 MAC2STR(dev->info.p2p_device_addr),
1743 dev->info.dev_capab, dev->info.group_capab,
1744 dev->info.device_name, dev->listen_freq);
1745 }
1746
1747 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1748
1749 if (dev->flags & P2P_DEV_USER_REJECTED) {
1750 p2p_dbg(p2p, "Do not report rejected device");
1751 return;
1752 }
1753
1754 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1755 !(dev->flags & P2P_DEV_REPORTED_ONCE));
1756 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1757 }
1758
1759
p2p_build_ssid(struct p2p_data * p2p,u8 * ssid,size_t * ssid_len)1760 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1761 {
1762 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1763 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1764 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1765 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1766 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1767 }
1768
1769
p2p_go_params(struct p2p_data * p2p,struct p2p_go_neg_results * params)1770 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1771 {
1772 if (p2p->ssid_set) {
1773 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len);
1774 params->ssid_len = p2p->ssid_len;
1775 } else {
1776 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len);
1777 }
1778 p2p->ssid_set = 0;
1779
1780 p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1781 return 0;
1782 }
1783
1784
p2p_go_complete(struct p2p_data * p2p,struct p2p_device * peer)1785 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1786 {
1787 struct p2p_go_neg_results res;
1788 int go = peer->go_state == LOCAL_GO;
1789 struct p2p_channels intersection;
1790
1791 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1792 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1793
1794 os_memset(&res, 0, sizeof(res));
1795 res.role_go = go;
1796 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1797 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1798 res.wps_method = peer->wps_method;
1799 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1800 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1801 res.persistent_group = 2;
1802 else
1803 res.persistent_group = 1;
1804 }
1805
1806 if (go) {
1807 /* Setup AP mode for WPS provisioning */
1808 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1809 p2p->op_channel);
1810 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1811 res.ssid_len = p2p->ssid_len;
1812 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1813 } else {
1814 res.freq = peer->oper_freq;
1815 if (p2p->ssid_len) {
1816 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1817 res.ssid_len = p2p->ssid_len;
1818 }
1819 }
1820
1821 p2p_channels_dump(p2p, "own channels", &p2p->channels);
1822 p2p_channels_dump(p2p, "peer channels", &peer->channels);
1823 p2p_channels_intersect(&p2p->channels, &peer->channels,
1824 &intersection);
1825 if (go) {
1826 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1827 p2p_channels_dump(p2p, "intersection after no-GO removal",
1828 &intersection);
1829 }
1830
1831 p2p_channels_to_freqs(&intersection, res.freq_list,
1832 P2P_MAX_CHANNELS);
1833
1834 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1835
1836 p2p_clear_timeout(p2p);
1837 p2p->ssid_set = 0;
1838 peer->go_neg_req_sent = 0;
1839 peer->wps_method = WPS_NOT_READY;
1840 peer->oob_pw_id = 0;
1841 wpabuf_free(peer->go_neg_conf);
1842 peer->go_neg_conf = NULL;
1843
1844 p2p_set_state(p2p, P2P_PROVISIONING);
1845 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1846 }
1847
1848
p2p_rx_p2p_action(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len,int rx_freq)1849 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1850 const u8 *data, size_t len, int rx_freq)
1851 {
1852 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1853 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1854
1855 if (len < 1)
1856 return;
1857
1858 switch (data[0]) {
1859 case P2P_GO_NEG_REQ:
1860 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1861 break;
1862 case P2P_GO_NEG_RESP:
1863 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1864 break;
1865 case P2P_GO_NEG_CONF:
1866 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1867 break;
1868 case P2P_INVITATION_REQ:
1869 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1870 rx_freq);
1871 break;
1872 case P2P_INVITATION_RESP:
1873 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1874 break;
1875 case P2P_PROV_DISC_REQ:
1876 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1877 break;
1878 case P2P_PROV_DISC_RESP:
1879 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1880 break;
1881 case P2P_DEV_DISC_REQ:
1882 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1883 break;
1884 case P2P_DEV_DISC_RESP:
1885 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1886 break;
1887 default:
1888 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1889 data[0]);
1890 break;
1891 }
1892 }
1893
1894
p2p_rx_action_public(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * bssid,const u8 * data,size_t len,int freq)1895 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1896 const u8 *sa, const u8 *bssid, const u8 *data,
1897 size_t len, int freq)
1898 {
1899 if (len < 1)
1900 return;
1901
1902 switch (data[0]) {
1903 case WLAN_PA_VENDOR_SPECIFIC:
1904 data++;
1905 len--;
1906 if (len < 4)
1907 return;
1908 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1909 return;
1910
1911 data += 4;
1912 len -= 4;
1913
1914 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1915 break;
1916 case WLAN_PA_GAS_INITIAL_REQ:
1917 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1918 break;
1919 case WLAN_PA_GAS_INITIAL_RESP:
1920 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1921 break;
1922 case WLAN_PA_GAS_COMEBACK_REQ:
1923 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1924 break;
1925 case WLAN_PA_GAS_COMEBACK_RESP:
1926 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1927 break;
1928 }
1929 }
1930
1931
p2p_rx_action(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * bssid,u8 category,const u8 * data,size_t len,int freq)1932 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1933 const u8 *bssid, u8 category,
1934 const u8 *data, size_t len, int freq)
1935 {
1936 if (category == WLAN_ACTION_PUBLIC) {
1937 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1938 return;
1939 }
1940
1941 if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1942 return;
1943
1944 if (len < 4)
1945 return;
1946
1947 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1948 return;
1949 data += 4;
1950 len -= 4;
1951
1952 /* P2P action frame */
1953 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1954 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1955
1956 if (len < 1)
1957 return;
1958 switch (data[0]) {
1959 case P2P_NOA:
1960 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1961 /* TODO */
1962 break;
1963 case P2P_PRESENCE_REQ:
1964 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1965 break;
1966 case P2P_PRESENCE_RESP:
1967 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1968 break;
1969 case P2P_GO_DISC_REQ:
1970 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1971 break;
1972 default:
1973 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1974 break;
1975 }
1976 }
1977
1978
p2p_go_neg_start(void * eloop_ctx,void * timeout_ctx)1979 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1980 {
1981 struct p2p_data *p2p = eloop_ctx;
1982 if (p2p->go_neg_peer == NULL)
1983 return;
1984 if (p2p->pending_listen_freq) {
1985 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1986 p2p->pending_listen_freq = 0;
1987 }
1988 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1989 p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1990 /*
1991 * Set new timeout to make sure a previously set one does not expire
1992 * too quickly while waiting for the GO Negotiation to complete.
1993 */
1994 p2p_set_timeout(p2p, 0, 500000);
1995 p2p_connect_send(p2p, p2p->go_neg_peer);
1996 }
1997
1998
p2p_invite_start(void * eloop_ctx,void * timeout_ctx)1999 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
2000 {
2001 struct p2p_data *p2p = eloop_ctx;
2002 if (p2p->invite_peer == NULL)
2003 return;
2004 if (p2p->pending_listen_freq) {
2005 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
2006 p2p->pending_listen_freq = 0;
2007 }
2008 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
2009 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
2010 p2p->invite_dev_pw_id);
2011 }
2012
2013
p2p_add_dev_from_probe_req(struct p2p_data * p2p,const u8 * addr,const u8 * ie,size_t ie_len)2014 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
2015 const u8 *ie, size_t ie_len)
2016 {
2017 struct p2p_message msg;
2018 struct p2p_device *dev;
2019
2020 os_memset(&msg, 0, sizeof(msg));
2021 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
2022 {
2023 p2p_parse_free(&msg);
2024 return; /* not a P2P probe */
2025 }
2026
2027 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
2028 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
2029 != 0) {
2030 /* The Probe Request is not part of P2P Device Discovery. It is
2031 * not known whether the source address of the frame is the P2P
2032 * Device Address or P2P Interface Address. Do not add a new
2033 * peer entry based on this frames.
2034 */
2035 p2p_parse_free(&msg);
2036 return;
2037 }
2038
2039 dev = p2p_get_device(p2p, addr);
2040 if (dev) {
2041 if (dev->country[0] == 0 && msg.listen_channel)
2042 os_memcpy(dev->country, msg.listen_channel, 3);
2043 os_get_reltime(&dev->last_seen);
2044 p2p_parse_free(&msg);
2045 return; /* already known */
2046 }
2047
2048 dev = p2p_create_device(p2p, addr);
2049 if (dev == NULL) {
2050 p2p_parse_free(&msg);
2051 return;
2052 }
2053
2054 os_get_reltime(&dev->last_seen);
2055 dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
2056
2057 if (msg.listen_channel) {
2058 os_memcpy(dev->country, msg.listen_channel, 3);
2059 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
2060 msg.listen_channel[4]);
2061 }
2062
2063 p2p_copy_wps_info(p2p, dev, 1, &msg);
2064
2065 if (msg.wfd_subelems) {
2066 wpabuf_free(dev->info.wfd_subelems);
2067 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
2068 }
2069
2070 p2p_parse_free(&msg);
2071
2072 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
2073 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
2074 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
2075 dev->info.group_capab, dev->info.device_name,
2076 dev->listen_freq);
2077 }
2078
2079
p2p_add_dev_from_go_neg_req(struct p2p_data * p2p,const u8 * addr,struct p2p_message * msg)2080 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
2081 const u8 *addr,
2082 struct p2p_message *msg)
2083 {
2084 struct p2p_device *dev;
2085
2086 dev = p2p_get_device(p2p, addr);
2087 if (dev) {
2088 os_get_reltime(&dev->last_seen);
2089 return dev; /* already known */
2090 }
2091
2092 dev = p2p_create_device(p2p, addr);
2093 if (dev == NULL)
2094 return NULL;
2095
2096 p2p_add_dev_info(p2p, addr, dev, msg);
2097
2098 return dev;
2099 }
2100
2101
dev_type_match(const u8 * dev_type,const u8 * req_dev_type)2102 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
2103 {
2104 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
2105 return 1;
2106 if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
2107 WPA_GET_BE32(&req_dev_type[2]) == 0 &&
2108 WPA_GET_BE16(&req_dev_type[6]) == 0)
2109 return 1; /* Category match with wildcard OUI/sub-category */
2110 return 0;
2111 }
2112
2113
dev_type_list_match(const u8 * dev_type,const u8 * req_dev_type[],size_t num_req_dev_type)2114 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
2115 size_t num_req_dev_type)
2116 {
2117 size_t i;
2118 for (i = 0; i < num_req_dev_type; i++) {
2119 if (dev_type_match(dev_type, req_dev_type[i]))
2120 return 1;
2121 }
2122 return 0;
2123 }
2124
2125
2126 /**
2127 * p2p_match_dev_type - Match local device type with requested type
2128 * @p2p: P2P module context from p2p_init()
2129 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
2130 * Returns: 1 on match, 0 on mismatch
2131 *
2132 * This function can be used to match the Requested Device Type attribute in
2133 * WPS IE with the local device types for deciding whether to reply to a Probe
2134 * Request frame.
2135 */
p2p_match_dev_type(struct p2p_data * p2p,struct wpabuf * wps)2136 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2137 {
2138 struct wps_parse_attr attr;
2139 size_t i;
2140
2141 if (wps_parse_msg(wps, &attr))
2142 return 1; /* assume no Requested Device Type attributes */
2143
2144 if (attr.num_req_dev_type == 0)
2145 return 1; /* no Requested Device Type attributes -> match */
2146
2147 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2148 attr.num_req_dev_type))
2149 return 1; /* Own Primary Device Type matches */
2150
2151 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2152 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2153 attr.req_dev_type,
2154 attr.num_req_dev_type))
2155 return 1; /* Own Secondary Device Type matches */
2156 }
2157
2158 /* No matching device type found */
2159 return 0;
2160 }
2161
2162
p2p_build_probe_resp_ies(struct p2p_data * p2p,const u8 * query_hash,u8 query_count)2163 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p,
2164 const u8 *query_hash,
2165 u8 query_count)
2166 {
2167 struct wpabuf *buf;
2168 u8 *len;
2169 int pw_id = -1;
2170 size_t extra = 0;
2171
2172 #ifdef CONFIG_WIFI_DISPLAY
2173 if (p2p->wfd_ie_probe_resp)
2174 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2175 #endif /* CONFIG_WIFI_DISPLAY */
2176
2177 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2178 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2179
2180 if (query_count)
2181 extra += MAX_SVC_ADV_IE_LEN;
2182
2183 buf = wpabuf_alloc(1000 + extra);
2184 if (buf == NULL)
2185 return NULL;
2186
2187 if (p2p->go_neg_peer) {
2188 /* Advertise immediate availability of WPS credential */
2189 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2190 }
2191
2192 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2193 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2194 wpabuf_free(buf);
2195 return NULL;
2196 }
2197
2198 #ifdef CONFIG_WIFI_DISPLAY
2199 if (p2p->wfd_ie_probe_resp)
2200 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2201 #endif /* CONFIG_WIFI_DISPLAY */
2202
2203 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2204 wpabuf_put_buf(buf,
2205 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2206
2207 /* P2P IE */
2208 len = p2p_buf_add_ie_hdr(buf);
2209 p2p_buf_add_capability(buf, p2p->dev_capab &
2210 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2211 if (p2p->ext_listen_interval)
2212 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2213 p2p->ext_listen_interval);
2214 p2p_buf_add_device_info(buf, p2p, NULL);
2215 p2p_buf_update_ie_hdr(buf, len);
2216
2217 if (query_count) {
2218 p2p_buf_add_service_instance(buf, p2p, query_count, query_hash,
2219 p2p->p2ps_adv_list);
2220 }
2221
2222 return buf;
2223 }
2224
2225
p2p_service_find_asp(struct p2p_data * p2p,const u8 * hash)2226 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash)
2227 {
2228 struct p2ps_advertisement *adv_data;
2229 int any_wfa;
2230
2231 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list);
2232
2233 /* Wildcard org.wi-fi.wfds matches any WFA spec defined service */
2234 any_wfa = os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0;
2235
2236 adv_data = p2p->p2ps_adv_list;
2237 while (adv_data) {
2238 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0)
2239 return 1; /* exact hash match */
2240 if (any_wfa &&
2241 os_strncmp(adv_data->svc_name, P2PS_WILD_HASH_STR,
2242 os_strlen(P2PS_WILD_HASH_STR)) == 0)
2243 return 1; /* WFA service match */
2244 adv_data = adv_data->next;
2245 }
2246
2247 return 0;
2248 }
2249
2250
2251 static enum p2p_probe_req_status
p2p_reply_probe(struct p2p_data * p2p,const u8 * addr,const u8 * dst,const u8 * bssid,const u8 * ie,size_t ie_len,unsigned int rx_freq)2252 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2253 const u8 *bssid, const u8 *ie, size_t ie_len,
2254 unsigned int rx_freq)
2255 {
2256 struct ieee802_11_elems elems;
2257 struct wpabuf *buf;
2258 struct ieee80211_mgmt *resp;
2259 struct p2p_message msg;
2260 struct wpabuf *ies;
2261 u8 channel, op_class;
2262
2263 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2264 ParseFailed) {
2265 /* Ignore invalid Probe Request frames */
2266 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2267 return P2P_PREQ_MALFORMED;
2268 }
2269
2270 if (elems.p2p == NULL) {
2271 /* not a P2P probe - ignore it */
2272 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2273 return P2P_PREQ_NOT_P2P;
2274 }
2275
2276 if (dst && !is_broadcast_ether_addr(dst) &&
2277 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2278 /* Not sent to the broadcast address or our P2P Device Address
2279 */
2280 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2281 MAC2STR(dst));
2282 return P2P_PREQ_NOT_PROCESSED;
2283 }
2284
2285 if (bssid && !is_broadcast_ether_addr(bssid)) {
2286 /* Not sent to the Wildcard BSSID */
2287 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2288 MAC2STR(bssid));
2289 return P2P_PREQ_NOT_PROCESSED;
2290 }
2291
2292 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2293 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2294 0) {
2295 /* not using P2P Wildcard SSID - ignore */
2296 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2297 return P2P_PREQ_NOT_PROCESSED;
2298 }
2299
2300 if (supp_rates_11b_only(&elems)) {
2301 /* Indicates support for 11b rates only */
2302 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2303 return P2P_PREQ_NOT_P2P;
2304 }
2305
2306 os_memset(&msg, 0, sizeof(msg));
2307 if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2308 /* Could not parse P2P attributes */
2309 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2310 return P2P_PREQ_NOT_P2P;
2311 }
2312
2313 if (msg.service_hash && msg.service_hash_count) {
2314 const u8 *hash = msg.service_hash;
2315 u8 i;
2316 int p2ps_svc_found = 0;
2317
2318 p2p_dbg(p2p, "in_listen=%d drv_in_listen=%d when received P2PS Probe Request at %u MHz; own Listen channel %u, pending listen freq %u MHz",
2319 p2p->in_listen, p2p->drv_in_listen, rx_freq,
2320 p2p->cfg->channel, p2p->pending_listen_freq);
2321
2322 if (!p2p->in_listen && !p2p->drv_in_listen &&
2323 p2p->pending_listen_freq && rx_freq &&
2324 rx_freq != p2p->pending_listen_freq) {
2325 p2p_dbg(p2p, "Do not reply to Probe Request frame that was received on %u MHz while waiting to start Listen state on %u MHz",
2326 rx_freq, p2p->pending_listen_freq);
2327 p2p_parse_free(&msg);
2328 return P2P_PREQ_NOT_LISTEN;
2329 }
2330
2331 for (i = 0; i < msg.service_hash_count; i++) {
2332 if (p2p_service_find_asp(p2p, hash)) {
2333 p2p_dbg(p2p, "Service Hash match found: "
2334 MACSTR, MAC2STR(hash));
2335 p2ps_svc_found = 1;
2336 break;
2337 }
2338 hash += P2PS_HASH_LEN;
2339 }
2340
2341 /* Probed hash unknown */
2342 if (!p2ps_svc_found) {
2343 p2p_dbg(p2p, "No Service Hash match found");
2344 p2p_parse_free(&msg);
2345 return P2P_PREQ_NOT_PROCESSED;
2346 }
2347 } else {
2348 /* This is not a P2PS Probe Request */
2349 p2p_dbg(p2p, "No P2PS Hash in Probe Request");
2350
2351 if (!p2p->in_listen || !p2p->drv_in_listen) {
2352 /* not in Listen state - ignore Probe Request */
2353 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2354 p2p->in_listen, p2p->drv_in_listen);
2355 p2p_parse_free(&msg);
2356 return P2P_PREQ_NOT_LISTEN;
2357 }
2358 }
2359
2360 if (msg.device_id &&
2361 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2362 /* Device ID did not match */
2363 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2364 MAC2STR(msg.device_id));
2365 p2p_parse_free(&msg);
2366 return P2P_PREQ_NOT_PROCESSED;
2367 }
2368
2369 /* Check Requested Device Type match */
2370 if (msg.wps_attributes &&
2371 !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2372 /* No match with Requested Device Type */
2373 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2374 p2p_parse_free(&msg);
2375 return P2P_PREQ_NOT_PROCESSED;
2376 }
2377
2378 if (!p2p->cfg->send_probe_resp) {
2379 /* Response generated elsewhere */
2380 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2381 p2p_parse_free(&msg);
2382 return P2P_PREQ_NOT_PROCESSED;
2383 }
2384
2385 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2386
2387 /*
2388 * We do not really have a specific BSS that this frame is advertising,
2389 * so build a frame that has some information in valid format. This is
2390 * really only used for discovery purposes, not to learn exact BSS
2391 * parameters.
2392 */
2393 ies = p2p_build_probe_resp_ies(p2p, msg.service_hash,
2394 msg.service_hash_count);
2395 p2p_parse_free(&msg);
2396 if (ies == NULL)
2397 return P2P_PREQ_NOT_PROCESSED;
2398
2399 buf = wpabuf_alloc(200 + wpabuf_len(ies));
2400 if (buf == NULL) {
2401 wpabuf_free(ies);
2402 return P2P_PREQ_NOT_PROCESSED;
2403 }
2404
2405 resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt,
2406 u.probe_resp.variable));
2407
2408 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2409 (WLAN_FC_STYPE_PROBE_RESP << 4));
2410 os_memcpy(resp->da, addr, ETH_ALEN);
2411 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2412 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2413 resp->u.probe_resp.beacon_int = host_to_le16(100);
2414 /* hardware or low-level driver will setup seq_ctrl and timestamp */
2415 resp->u.probe_resp.capab_info =
2416 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2417 WLAN_CAPABILITY_PRIVACY |
2418 WLAN_CAPABILITY_SHORT_SLOT_TIME);
2419
2420 wpabuf_put_u8(buf, WLAN_EID_SSID);
2421 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2422 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2423
2424 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2425 wpabuf_put_u8(buf, 8);
2426 wpabuf_put_u8(buf, (60 / 5) | 0x80);
2427 wpabuf_put_u8(buf, 90 / 5);
2428 wpabuf_put_u8(buf, (120 / 5) | 0x80);
2429 wpabuf_put_u8(buf, 180 / 5);
2430 wpabuf_put_u8(buf, (240 / 5) | 0x80);
2431 wpabuf_put_u8(buf, 360 / 5);
2432 wpabuf_put_u8(buf, 480 / 5);
2433 wpabuf_put_u8(buf, 540 / 5);
2434
2435 if (!rx_freq) {
2436 channel = p2p->cfg->channel;
2437 } else if (p2p_freq_to_channel(rx_freq, &op_class, &channel)) {
2438 wpabuf_free(ies);
2439 wpabuf_free(buf);
2440 return P2P_PREQ_NOT_PROCESSED;
2441 }
2442
2443 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2444 wpabuf_put_u8(buf, 1);
2445 wpabuf_put_u8(buf, channel);
2446
2447 wpabuf_put_buf(buf, ies);
2448 wpabuf_free(ies);
2449
2450 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf, rx_freq);
2451
2452 wpabuf_free(buf);
2453
2454 return P2P_PREQ_PROCESSED;
2455 }
2456
2457
2458 enum p2p_probe_req_status
p2p_probe_req_rx(struct p2p_data * p2p,const u8 * addr,const u8 * dst,const u8 * bssid,const u8 * ie,size_t ie_len,unsigned int rx_freq)2459 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2460 const u8 *bssid, const u8 *ie, size_t ie_len,
2461 unsigned int rx_freq)
2462 {
2463 enum p2p_probe_req_status res;
2464
2465 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2466
2467 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq);
2468 if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED)
2469 return res;
2470
2471 /*
2472 * Activate a pending GO Negotiation/Invite flow if a received Probe
2473 * Request frame is from an expected peer. Some devices may share the
2474 * same address for P2P and non-P2P STA running simultaneously. The
2475 * P2P_PREQ_PROCESSED and P2P_PREQ_NOT_PROCESSED p2p_reply_probe()
2476 * return values verified above ensure we are handling a Probe Request
2477 * frame from a P2P peer.
2478 */
2479 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2480 p2p->go_neg_peer &&
2481 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2482 == 0 &&
2483 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2484 /* Received a Probe Request from GO Negotiation peer */
2485 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2486 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2487 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2488 return res;
2489 }
2490
2491 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2492 p2p->invite_peer &&
2493 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2494 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2495 == 0) {
2496 /* Received a Probe Request from Invite peer */
2497 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2498 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2499 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2500 return res;
2501 }
2502
2503 return res;
2504 }
2505
2506
p2p_assoc_req_ie_wlan_ap(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,struct wpabuf * p2p_ie)2507 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2508 u8 *buf, size_t len, struct wpabuf *p2p_ie)
2509 {
2510 struct wpabuf *tmp;
2511 u8 *lpos;
2512 size_t tmplen;
2513 int res;
2514 u8 group_capab;
2515 struct p2p_message msg;
2516
2517 if (p2p_ie == NULL)
2518 return 0; /* WLAN AP is not a P2P manager */
2519
2520 os_memset(&msg, 0, sizeof(msg));
2521 if (p2p_parse_p2p_ie(p2p_ie, &msg) < 0)
2522 return 0;
2523
2524 p2p_dbg(p2p, "BSS P2P manageability %s",
2525 msg.manageability ? "enabled" : "disabled");
2526
2527 if (!msg.manageability)
2528 return 0;
2529
2530 /*
2531 * (Re)Association Request - P2P IE
2532 * P2P Capability attribute (shall be present)
2533 * P2P Interface attribute (present if concurrent device and
2534 * P2P Management is enabled)
2535 */
2536 tmp = wpabuf_alloc(200);
2537 if (tmp == NULL)
2538 return -1;
2539
2540 lpos = p2p_buf_add_ie_hdr(tmp);
2541 group_capab = 0;
2542 if (p2p->num_groups > 0) {
2543 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2544 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2545 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2546 p2p->cross_connect)
2547 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2548 }
2549 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2550 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2551 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2552 p2p_buf_add_p2p_interface(tmp, p2p);
2553 p2p_buf_update_ie_hdr(tmp, lpos);
2554
2555 tmplen = wpabuf_len(tmp);
2556 if (tmplen > len)
2557 res = -1;
2558 else {
2559 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2560 res = tmplen;
2561 }
2562 wpabuf_free(tmp);
2563
2564 return res;
2565 }
2566
2567
p2p_assoc_req_ie(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,int p2p_group,struct wpabuf * p2p_ie)2568 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2569 size_t len, int p2p_group, struct wpabuf *p2p_ie)
2570 {
2571 struct wpabuf *tmp;
2572 u8 *lpos;
2573 struct p2p_device *peer;
2574 size_t tmplen;
2575 int res;
2576 size_t extra = 0;
2577
2578 if (!p2p_group)
2579 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2580
2581 #ifdef CONFIG_WIFI_DISPLAY
2582 if (p2p->wfd_ie_assoc_req)
2583 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2584 #endif /* CONFIG_WIFI_DISPLAY */
2585
2586 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2587 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2588
2589 /*
2590 * (Re)Association Request - P2P IE
2591 * P2P Capability attribute (shall be present)
2592 * Extended Listen Timing (may be present)
2593 * P2P Device Info attribute (shall be present)
2594 */
2595 tmp = wpabuf_alloc(200 + extra);
2596 if (tmp == NULL)
2597 return -1;
2598
2599 #ifdef CONFIG_WIFI_DISPLAY
2600 if (p2p->wfd_ie_assoc_req)
2601 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2602 #endif /* CONFIG_WIFI_DISPLAY */
2603
2604 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2605 wpabuf_put_buf(tmp,
2606 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2607
2608 peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2609
2610 lpos = p2p_buf_add_ie_hdr(tmp);
2611 p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2612 if (p2p->ext_listen_interval)
2613 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2614 p2p->ext_listen_interval);
2615 p2p_buf_add_device_info(tmp, p2p, peer);
2616 p2p_buf_update_ie_hdr(tmp, lpos);
2617
2618 tmplen = wpabuf_len(tmp);
2619 if (tmplen > len)
2620 res = -1;
2621 else {
2622 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2623 res = tmplen;
2624 }
2625 wpabuf_free(tmp);
2626
2627 return res;
2628 }
2629
2630
p2p_scan_result_text(const u8 * ies,size_t ies_len,char * buf,char * end)2631 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2632 {
2633 struct wpabuf *p2p_ie;
2634 int ret;
2635
2636 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2637 if (p2p_ie == NULL)
2638 return 0;
2639
2640 ret = p2p_attr_text(p2p_ie, buf, end);
2641 wpabuf_free(p2p_ie);
2642 return ret;
2643 }
2644
2645
2646 struct p2ps_advertisement *
p2p_service_p2ps_id(struct p2p_data * p2p,u32 adv_id)2647 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id)
2648 {
2649 struct p2ps_advertisement *adv_data;
2650
2651 if (!p2p)
2652 return NULL;
2653
2654 adv_data = p2p->p2ps_adv_list;
2655 while (adv_data) {
2656 if (adv_data->id == adv_id)
2657 return adv_data;
2658 adv_data = adv_data->next;
2659 }
2660
2661 return NULL;
2662 }
2663
2664
p2p_service_del_asp(struct p2p_data * p2p,u32 adv_id)2665 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id)
2666 {
2667 struct p2ps_advertisement *adv_data;
2668 struct p2ps_advertisement **prior;
2669
2670 if (!p2p)
2671 return -1;
2672
2673 adv_data = p2p->p2ps_adv_list;
2674 prior = &p2p->p2ps_adv_list;
2675 while (adv_data) {
2676 if (adv_data->id == adv_id) {
2677 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id);
2678 *prior = adv_data->next;
2679 os_free(adv_data);
2680 return 0;
2681 }
2682 prior = &adv_data->next;
2683 adv_data = adv_data->next;
2684 }
2685
2686 return -1;
2687 }
2688
2689
p2p_service_add_asp(struct p2p_data * p2p,int auto_accept,u32 adv_id,const char * adv_str,u8 svc_state,u16 config_methods,const char * svc_info)2690 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id,
2691 const char *adv_str, u8 svc_state, u16 config_methods,
2692 const char *svc_info)
2693 {
2694 struct p2ps_advertisement *adv_data, *tmp, **prev;
2695 u8 buf[P2PS_HASH_LEN];
2696 size_t adv_data_len, adv_len, info_len = 0;
2697
2698 if (!p2p || !adv_str || !adv_str[0])
2699 return -1;
2700
2701 if (!(config_methods & p2p->cfg->config_methods)) {
2702 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x",
2703 config_methods, p2p->cfg->config_methods);
2704 return -1;
2705 }
2706
2707 if (!p2ps_gen_hash(p2p, adv_str, buf))
2708 return -1;
2709
2710 if (svc_info)
2711 info_len = os_strlen(svc_info);
2712 adv_len = os_strlen(adv_str);
2713 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 +
2714 info_len + 1;
2715
2716 adv_data = os_zalloc(adv_data_len);
2717 if (!adv_data)
2718 return -1;
2719
2720 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN);
2721 adv_data->id = adv_id;
2722 adv_data->state = svc_state;
2723 adv_data->config_methods = config_methods & p2p->cfg->config_methods;
2724 adv_data->auto_accept = (u8) auto_accept;
2725 os_memcpy(adv_data->svc_name, adv_str, adv_len);
2726
2727 if (svc_info && info_len) {
2728 adv_data->svc_info = &adv_data->svc_name[adv_len + 1];
2729 os_memcpy(adv_data->svc_info, svc_info, info_len);
2730 }
2731
2732 /*
2733 * Group Advertisements by service string. They do not need to be
2734 * sorted, but groups allow easier Probe Response instance grouping
2735 */
2736 tmp = p2p->p2ps_adv_list;
2737 prev = &p2p->p2ps_adv_list;
2738 while (tmp) {
2739 if (tmp->id == adv_data->id) {
2740 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) {
2741 os_free(adv_data);
2742 return -1;
2743 }
2744 adv_data->next = tmp->next;
2745 *prev = adv_data;
2746 os_free(tmp);
2747 goto inserted;
2748 } else {
2749 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) {
2750 adv_data->next = tmp->next;
2751 tmp->next = adv_data;
2752 goto inserted;
2753 }
2754 }
2755 prev = &tmp->next;
2756 tmp = tmp->next;
2757 }
2758
2759 /* No svc_name match found */
2760 adv_data->next = p2p->p2ps_adv_list;
2761 p2p->p2ps_adv_list = adv_data;
2762
2763 inserted:
2764 p2p_dbg(p2p,
2765 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s'",
2766 adv_id, adv_data->config_methods, svc_state, adv_str);
2767
2768 return 0;
2769 }
2770
2771
p2p_service_flush_asp(struct p2p_data * p2p)2772 void p2p_service_flush_asp(struct p2p_data *p2p)
2773 {
2774 struct p2ps_advertisement *adv, *prev;
2775
2776 if (!p2p)
2777 return;
2778
2779 adv = p2p->p2ps_adv_list;
2780 while (adv) {
2781 prev = adv;
2782 adv = adv->next;
2783 os_free(prev);
2784 }
2785
2786 p2p->p2ps_adv_list = NULL;
2787 p2p_dbg(p2p, "All ASP advertisements flushed");
2788 }
2789
2790
p2p_parse_dev_addr_in_p2p_ie(struct wpabuf * p2p_ie,u8 * dev_addr)2791 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2792 {
2793 struct p2p_message msg;
2794
2795 os_memset(&msg, 0, sizeof(msg));
2796 if (p2p_parse_p2p_ie(p2p_ie, &msg))
2797 return -1;
2798
2799 if (msg.p2p_device_addr) {
2800 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2801 return 0;
2802 } else if (msg.device_id) {
2803 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2804 return 0;
2805 }
2806 return -1;
2807 }
2808
2809
p2p_parse_dev_addr(const u8 * ies,size_t ies_len,u8 * dev_addr)2810 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2811 {
2812 struct wpabuf *p2p_ie;
2813 int ret;
2814
2815 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2816 P2P_IE_VENDOR_TYPE);
2817 if (p2p_ie == NULL)
2818 return -1;
2819 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2820 wpabuf_free(p2p_ie);
2821 return ret;
2822 }
2823
2824
p2p_clear_go_neg(struct p2p_data * p2p)2825 static void p2p_clear_go_neg(struct p2p_data *p2p)
2826 {
2827 p2p->go_neg_peer = NULL;
2828 p2p_clear_timeout(p2p);
2829 p2p_set_state(p2p, P2P_IDLE);
2830 }
2831
2832
p2p_wps_success_cb(struct p2p_data * p2p,const u8 * mac_addr)2833 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2834 {
2835 if (p2p->go_neg_peer == NULL) {
2836 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2837 return; /* No pending Group Formation */
2838 }
2839
2840 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2841 0) {
2842 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2843 MACSTR " (GO Negotiation peer " MACSTR ")",
2844 MAC2STR(mac_addr),
2845 MAC2STR(p2p->go_neg_peer->intended_addr));
2846 return; /* Ignore unexpected peer address */
2847 }
2848
2849 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2850 MAC2STR(mac_addr));
2851
2852 p2p_clear_go_neg(p2p);
2853 }
2854
2855
p2p_group_formation_failed(struct p2p_data * p2p)2856 void p2p_group_formation_failed(struct p2p_data *p2p)
2857 {
2858 if (p2p->go_neg_peer == NULL) {
2859 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2860 return; /* No pending Group Formation */
2861 }
2862
2863 p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2864 MAC2STR(p2p->go_neg_peer->intended_addr));
2865
2866 p2p_clear_go_neg(p2p);
2867 }
2868
2869
p2p_init(const struct p2p_config * cfg)2870 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2871 {
2872 struct p2p_data *p2p;
2873
2874 if (cfg->max_peers < 1 ||
2875 cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2876 return NULL;
2877
2878 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2879 if (p2p == NULL)
2880 return NULL;
2881 p2p->cfg = (struct p2p_config *) (p2p + 1);
2882 os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2883 if (cfg->dev_name)
2884 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2885 if (cfg->manufacturer)
2886 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2887 if (cfg->model_name)
2888 p2p->cfg->model_name = os_strdup(cfg->model_name);
2889 if (cfg->model_number)
2890 p2p->cfg->model_number = os_strdup(cfg->model_number);
2891 if (cfg->serial_number)
2892 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2893 if (cfg->pref_chan) {
2894 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2895 sizeof(struct p2p_channel));
2896 if (p2p->cfg->pref_chan) {
2897 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2898 cfg->num_pref_chan *
2899 sizeof(struct p2p_channel));
2900 } else
2901 p2p->cfg->num_pref_chan = 0;
2902 }
2903
2904 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);
2905
2906 p2p->min_disc_int = 1;
2907 p2p->max_disc_int = 3;
2908 p2p->max_disc_tu = -1;
2909
2910 if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2911 p2p->next_tie_breaker = 0;
2912 p2p->next_tie_breaker &= 0x01;
2913 if (cfg->sd_request)
2914 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2915 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2916 if (cfg->concurrent_operations)
2917 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2918 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2919
2920 dl_list_init(&p2p->devices);
2921
2922 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2923 p2p_expiration_timeout, p2p, NULL);
2924
2925 p2p->go_timeout = 100;
2926 p2p->client_timeout = 20;
2927 p2p->num_p2p_sd_queries = 0;
2928
2929 p2p_dbg(p2p, "initialized");
2930 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2931 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2932
2933 return p2p;
2934 }
2935
2936
p2p_deinit(struct p2p_data * p2p)2937 void p2p_deinit(struct p2p_data *p2p)
2938 {
2939 #ifdef CONFIG_WIFI_DISPLAY
2940 wpabuf_free(p2p->wfd_ie_beacon);
2941 wpabuf_free(p2p->wfd_ie_probe_req);
2942 wpabuf_free(p2p->wfd_ie_probe_resp);
2943 wpabuf_free(p2p->wfd_ie_assoc_req);
2944 wpabuf_free(p2p->wfd_ie_invitation);
2945 wpabuf_free(p2p->wfd_ie_prov_disc_req);
2946 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2947 wpabuf_free(p2p->wfd_ie_go_neg);
2948 wpabuf_free(p2p->wfd_dev_info);
2949 wpabuf_free(p2p->wfd_assoc_bssid);
2950 wpabuf_free(p2p->wfd_coupled_sink_info);
2951 #endif /* CONFIG_WIFI_DISPLAY */
2952
2953 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2954 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2955 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2956 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2957 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2958 p2p_flush(p2p);
2959 p2p_free_req_dev_types(p2p);
2960 os_free(p2p->cfg->dev_name);
2961 os_free(p2p->cfg->manufacturer);
2962 os_free(p2p->cfg->model_name);
2963 os_free(p2p->cfg->model_number);
2964 os_free(p2p->cfg->serial_number);
2965 os_free(p2p->cfg->pref_chan);
2966 os_free(p2p->groups);
2967 p2ps_prov_free(p2p);
2968 wpabuf_free(p2p->sd_resp);
2969 os_free(p2p->after_scan_tx);
2970 p2p_remove_wps_vendor_extensions(p2p);
2971 os_free(p2p->no_go_freq.range);
2972 p2p_service_flush_asp(p2p);
2973
2974 os_free(p2p);
2975 }
2976
2977
p2p_flush(struct p2p_data * p2p)2978 void p2p_flush(struct p2p_data *p2p)
2979 {
2980 struct p2p_device *dev, *prev;
2981 p2p_stop_find(p2p);
2982 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2983 list) {
2984 dl_list_del(&dev->list);
2985 p2p_device_free(p2p, dev);
2986 }
2987 p2p_free_sd_queries(p2p);
2988 os_free(p2p->after_scan_tx);
2989 p2p->after_scan_tx = NULL;
2990 }
2991
2992
p2p_unauthorize(struct p2p_data * p2p,const u8 * addr)2993 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2994 {
2995 struct p2p_device *dev;
2996
2997 dev = p2p_get_device(p2p, addr);
2998 if (dev == NULL)
2999 return -1;
3000
3001 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
3002
3003 if (p2p->go_neg_peer == dev) {
3004 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
3005 p2p->go_neg_peer = NULL;
3006 }
3007
3008 dev->wps_method = WPS_NOT_READY;
3009 dev->oob_pw_id = 0;
3010 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
3011 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
3012
3013 /* Check if after_scan_tx is for this peer. If so free it */
3014 if (p2p->after_scan_tx &&
3015 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
3016 os_free(p2p->after_scan_tx);
3017 p2p->after_scan_tx = NULL;
3018 }
3019
3020 return 0;
3021 }
3022
3023
p2p_set_dev_name(struct p2p_data * p2p,const char * dev_name)3024 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
3025 {
3026 os_free(p2p->cfg->dev_name);
3027 if (dev_name) {
3028 p2p->cfg->dev_name = os_strdup(dev_name);
3029 if (p2p->cfg->dev_name == NULL)
3030 return -1;
3031 } else
3032 p2p->cfg->dev_name = NULL;
3033 return 0;
3034 }
3035
3036
p2p_set_manufacturer(struct p2p_data * p2p,const char * manufacturer)3037 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
3038 {
3039 os_free(p2p->cfg->manufacturer);
3040 p2p->cfg->manufacturer = NULL;
3041 if (manufacturer) {
3042 p2p->cfg->manufacturer = os_strdup(manufacturer);
3043 if (p2p->cfg->manufacturer == NULL)
3044 return -1;
3045 }
3046
3047 return 0;
3048 }
3049
3050
p2p_set_model_name(struct p2p_data * p2p,const char * model_name)3051 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
3052 {
3053 os_free(p2p->cfg->model_name);
3054 p2p->cfg->model_name = NULL;
3055 if (model_name) {
3056 p2p->cfg->model_name = os_strdup(model_name);
3057 if (p2p->cfg->model_name == NULL)
3058 return -1;
3059 }
3060
3061 return 0;
3062 }
3063
3064
p2p_set_model_number(struct p2p_data * p2p,const char * model_number)3065 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
3066 {
3067 os_free(p2p->cfg->model_number);
3068 p2p->cfg->model_number = NULL;
3069 if (model_number) {
3070 p2p->cfg->model_number = os_strdup(model_number);
3071 if (p2p->cfg->model_number == NULL)
3072 return -1;
3073 }
3074
3075 return 0;
3076 }
3077
3078
p2p_set_serial_number(struct p2p_data * p2p,const char * serial_number)3079 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
3080 {
3081 os_free(p2p->cfg->serial_number);
3082 p2p->cfg->serial_number = NULL;
3083 if (serial_number) {
3084 p2p->cfg->serial_number = os_strdup(serial_number);
3085 if (p2p->cfg->serial_number == NULL)
3086 return -1;
3087 }
3088
3089 return 0;
3090 }
3091
3092
p2p_set_config_methods(struct p2p_data * p2p,u16 config_methods)3093 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
3094 {
3095 p2p->cfg->config_methods = config_methods;
3096 }
3097
3098
p2p_set_uuid(struct p2p_data * p2p,const u8 * uuid)3099 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
3100 {
3101 os_memcpy(p2p->cfg->uuid, uuid, 16);
3102 }
3103
3104
p2p_set_pri_dev_type(struct p2p_data * p2p,const u8 * pri_dev_type)3105 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
3106 {
3107 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
3108 return 0;
3109 }
3110
3111
p2p_set_sec_dev_types(struct p2p_data * p2p,const u8 dev_types[][8],size_t num_dev_types)3112 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
3113 size_t num_dev_types)
3114 {
3115 if (num_dev_types > P2P_SEC_DEVICE_TYPES)
3116 num_dev_types = P2P_SEC_DEVICE_TYPES;
3117 p2p->cfg->num_sec_dev_types = num_dev_types;
3118 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
3119 return 0;
3120 }
3121
3122
p2p_remove_wps_vendor_extensions(struct p2p_data * p2p)3123 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
3124 {
3125 int i;
3126
3127 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3128 wpabuf_free(p2p->wps_vendor_ext[i]);
3129 p2p->wps_vendor_ext[i] = NULL;
3130 }
3131 }
3132
3133
p2p_add_wps_vendor_extension(struct p2p_data * p2p,const struct wpabuf * vendor_ext)3134 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
3135 const struct wpabuf *vendor_ext)
3136 {
3137 int i;
3138
3139 if (vendor_ext == NULL)
3140 return -1;
3141
3142 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3143 if (p2p->wps_vendor_ext[i] == NULL)
3144 break;
3145 }
3146 if (i >= P2P_MAX_WPS_VENDOR_EXT)
3147 return -1;
3148
3149 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
3150 if (p2p->wps_vendor_ext[i] == NULL)
3151 return -1;
3152
3153 return 0;
3154 }
3155
3156
p2p_set_country(struct p2p_data * p2p,const char * country)3157 int p2p_set_country(struct p2p_data *p2p, const char *country)
3158 {
3159 os_memcpy(p2p->cfg->country, country, 3);
3160 return 0;
3161 }
3162
3163
p2p_pre_find_operation(struct p2p_data * p2p,struct p2p_device * dev)3164 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
3165 {
3166 if (dev->sd_pending_bcast_queries == 0) {
3167 /* Initialize with total number of registered broadcast
3168 * SD queries. */
3169 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
3170 }
3171
3172 if (p2p_start_sd(p2p, dev) == 0)
3173 return 1;
3174
3175 if (dev->req_config_methods &&
3176 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
3177 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3178 MACSTR " (config methods 0x%x)",
3179 MAC2STR(dev->info.p2p_device_addr),
3180 dev->req_config_methods);
3181 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
3182 return 1;
3183 }
3184
3185 return 0;
3186 }
3187
3188
p2p_continue_find(struct p2p_data * p2p)3189 void p2p_continue_find(struct p2p_data *p2p)
3190 {
3191 struct p2p_device *dev;
3192 int found;
3193
3194 p2p_set_state(p2p, P2P_SEARCH);
3195
3196 /* Continue from the device following the last iteration */
3197 found = 0;
3198 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3199 if (dev == p2p->last_p2p_find_oper) {
3200 found = 1;
3201 continue;
3202 }
3203 if (!found)
3204 continue;
3205 if (p2p_pre_find_operation(p2p, dev) > 0) {
3206 p2p->last_p2p_find_oper = dev;
3207 return;
3208 }
3209 }
3210
3211 /*
3212 * Wrap around to the beginning of the list and continue until the last
3213 * iteration device.
3214 */
3215 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3216 if (p2p_pre_find_operation(p2p, dev) > 0) {
3217 p2p->last_p2p_find_oper = dev;
3218 return;
3219 }
3220 if (dev == p2p->last_p2p_find_oper)
3221 break;
3222 }
3223
3224 p2p_listen_in_find(p2p, 1);
3225 }
3226
3227
p2p_sd_cb(struct p2p_data * p2p,int success)3228 static void p2p_sd_cb(struct p2p_data *p2p, int success)
3229 {
3230 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
3231 success);
3232 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3233
3234 if (!success) {
3235 if (p2p->sd_peer)
3236 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3237 p2p->sd_peer = NULL;
3238 if (p2p->state != P2P_IDLE)
3239 p2p_continue_find(p2p);
3240 return;
3241 }
3242
3243 if (p2p->sd_peer == NULL) {
3244 p2p_dbg(p2p, "No SD peer entry known");
3245 if (p2p->state != P2P_IDLE)
3246 p2p_continue_find(p2p);
3247 return;
3248 }
3249
3250 if (p2p->sd_query && p2p->sd_query->for_all_peers) {
3251 /* Update the pending broadcast SD query count for this device
3252 */
3253 p2p->sd_peer->sd_pending_bcast_queries--;
3254
3255 /*
3256 * If there are no pending broadcast queries for this device,
3257 * mark it as done (-1).
3258 */
3259 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
3260 p2p->sd_peer->sd_pending_bcast_queries = -1;
3261 }
3262
3263 /* Wait for response from the peer */
3264 p2p_set_state(p2p, P2P_SD_DURING_FIND);
3265 p2p_set_timeout(p2p, 0, 200000);
3266 }
3267
3268
3269 /**
3270 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
3271 * @p2p: P2P module context from p2p_init()
3272 */
p2p_retry_pd(struct p2p_data * p2p)3273 static void p2p_retry_pd(struct p2p_data *p2p)
3274 {
3275 struct p2p_device *dev;
3276
3277 /*
3278 * Retry the prov disc req attempt only for the peer that the user had
3279 * requested.
3280 */
3281
3282 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3283 if (os_memcmp(p2p->pending_pd_devaddr,
3284 dev->info.p2p_device_addr, ETH_ALEN) != 0)
3285 continue;
3286 if (!dev->req_config_methods)
3287 continue;
3288
3289 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3290 MACSTR " (config methods 0x%x)",
3291 MAC2STR(dev->info.p2p_device_addr),
3292 dev->req_config_methods);
3293 p2p_send_prov_disc_req(p2p, dev,
3294 dev->flags & P2P_DEV_PD_FOR_JOIN,
3295 p2p->pd_force_freq);
3296 return;
3297 }
3298 }
3299
3300
p2p_prov_disc_cb(struct p2p_data * p2p,int success)3301 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
3302 {
3303 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
3304 success);
3305
3306 /*
3307 * Postpone resetting the pending action state till after we actually
3308 * time out. This allows us to take some action like notifying any
3309 * interested parties about no response to the request.
3310 *
3311 * When the timer (below) goes off we check in IDLE, SEARCH, or
3312 * LISTEN_ONLY state, which are the only allowed states to issue a PD
3313 * requests in, if this was still pending and then raise notification.
3314 */
3315
3316 if (!success) {
3317 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3318
3319 if (p2p->user_initiated_pd &&
3320 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
3321 {
3322 /* Retry request from timeout to avoid busy loops */
3323 p2p->pending_action_state = P2P_PENDING_PD;
3324 p2p_set_timeout(p2p, 0, 50000);
3325 } else if (p2p->state != P2P_IDLE)
3326 p2p_continue_find(p2p);
3327 else if (p2p->user_initiated_pd) {
3328 p2p->pending_action_state = P2P_PENDING_PD;
3329 p2p_set_timeout(p2p, 0, 300000);
3330 }
3331 return;
3332 }
3333
3334 /*
3335 * This postponing, of resetting pending_action_state, needs to be
3336 * done only for user initiated PD requests and not internal ones.
3337 */
3338 if (p2p->user_initiated_pd)
3339 p2p->pending_action_state = P2P_PENDING_PD;
3340 else
3341 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3342
3343 /* Wait for response from the peer */
3344 if (p2p->state == P2P_SEARCH)
3345 p2p_set_state(p2p, P2P_PD_DURING_FIND);
3346 p2p_set_timeout(p2p, 0, 200000);
3347 }
3348
3349
p2p_check_after_scan_tx_continuation(struct p2p_data * p2p)3350 static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p)
3351 {
3352 if (p2p->after_scan_tx_in_progress) {
3353 p2p->after_scan_tx_in_progress = 0;
3354 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3355 p2p_run_after_scan(p2p))
3356 return 1;
3357 if (p2p->state == P2P_SEARCH) {
3358 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3359 p2p_continue_find(p2p);
3360 }
3361 }
3362
3363 return 0;
3364 }
3365
3366
p2p_prov_disc_resp_cb(struct p2p_data * p2p,int success)3367 static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success)
3368 {
3369 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d",
3370 success);
3371
3372 if (p2p->send_action_in_progress) {
3373 p2p->send_action_in_progress = 0;
3374 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3375 }
3376
3377 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3378
3379 if (!success)
3380 goto continue_search;
3381
3382 if (!p2p->cfg->prov_disc_resp_cb ||
3383 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1)
3384 goto continue_search;
3385
3386 p2p_dbg(p2p,
3387 "Post-Provision Discovery operations started - do not try to continue other P2P operations");
3388 return;
3389
3390 continue_search:
3391 p2p_check_after_scan_tx_continuation(p2p);
3392 }
3393
3394
p2p_scan_res_handler(struct p2p_data * p2p,const u8 * bssid,int freq,struct os_reltime * rx_time,int level,const u8 * ies,size_t ies_len)3395 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
3396 struct os_reltime *rx_time, int level, const u8 *ies,
3397 size_t ies_len)
3398 {
3399 if (os_reltime_before(rx_time, &p2p->find_start)) {
3400 /*
3401 * The driver may have cached (e.g., in cfg80211 BSS table) the
3402 * scan results for relatively long time. To avoid reporting
3403 * stale information, update P2P peers only based on results
3404 * that have based on frames received after the last p2p_find
3405 * operation was started.
3406 */
3407 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
3408 " (rx_time=%u.%06u)",
3409 MAC2STR(bssid), (unsigned int) rx_time->sec,
3410 (unsigned int) rx_time->usec);
3411 return 0;
3412 }
3413
3414 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
3415
3416 return 0;
3417 }
3418
3419
p2p_scan_res_handled(struct p2p_data * p2p)3420 void p2p_scan_res_handled(struct p2p_data *p2p)
3421 {
3422 if (!p2p->p2p_scan_running) {
3423 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
3424 }
3425 p2p->p2p_scan_running = 0;
3426 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3427
3428 if (p2p_run_after_scan(p2p))
3429 return;
3430 if (p2p->state == P2P_SEARCH)
3431 p2p_continue_find(p2p);
3432 }
3433
3434
p2p_scan_ie(struct p2p_data * p2p,struct wpabuf * ies,const u8 * dev_id)3435 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
3436 {
3437 u8 dev_capab;
3438 u8 *len;
3439
3440 #ifdef CONFIG_WIFI_DISPLAY
3441 if (p2p->wfd_ie_probe_req)
3442 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3443 #endif /* CONFIG_WIFI_DISPLAY */
3444
3445 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3446 wpabuf_put_buf(ies,
3447 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3448
3449 len = p2p_buf_add_ie_hdr(ies);
3450
3451 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3452
3453 /* P2PS requires Probe Request frames to include SD bit */
3454 if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3455 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
3456
3457 p2p_buf_add_capability(ies, dev_capab, 0);
3458
3459 if (dev_id)
3460 p2p_buf_add_device_id(ies, dev_id);
3461 if (p2p->cfg->reg_class && p2p->cfg->channel)
3462 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3463 p2p->cfg->reg_class,
3464 p2p->cfg->channel);
3465 if (p2p->ext_listen_interval)
3466 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3467 p2p->ext_listen_interval);
3468
3469 if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3470 p2p_buf_add_service_hash(ies, p2p);
3471
3472 /* TODO: p2p_buf_add_operating_channel() if GO */
3473 p2p_buf_update_ie_hdr(ies, len);
3474 }
3475
3476
p2p_scan_ie_buf_len(struct p2p_data * p2p)3477 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3478 {
3479 size_t len = 100;
3480
3481 #ifdef CONFIG_WIFI_DISPLAY
3482 if (p2p && p2p->wfd_ie_probe_req)
3483 len += wpabuf_len(p2p->wfd_ie_probe_req);
3484 #endif /* CONFIG_WIFI_DISPLAY */
3485
3486 if (p2p && p2p->vendor_elem &&
3487 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3488 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3489
3490 return len;
3491 }
3492
3493
p2p_ie_text(struct wpabuf * p2p_ie,char * buf,char * end)3494 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3495 {
3496 return p2p_attr_text(p2p_ie, buf, end);
3497 }
3498
3499
p2p_go_neg_req_cb(struct p2p_data * p2p,int success)3500 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3501 {
3502 struct p2p_device *dev = p2p->go_neg_peer;
3503 int timeout;
3504
3505 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3506
3507 if (dev == NULL) {
3508 p2p_dbg(p2p, "No pending GO Negotiation");
3509 return;
3510 }
3511
3512 if (success) {
3513 if (dev->flags & P2P_DEV_USER_REJECTED) {
3514 p2p_set_state(p2p, P2P_IDLE);
3515 return;
3516 }
3517 } else if (dev->go_neg_req_sent) {
3518 /* Cancel the increment from p2p_connect_send() on failure */
3519 dev->go_neg_req_sent--;
3520 }
3521
3522 if (!success &&
3523 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3524 !is_zero_ether_addr(dev->member_in_go_dev)) {
3525 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3526 MAC2STR(dev->info.p2p_device_addr));
3527 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3528 p2p_send_dev_disc_req(p2p, dev);
3529 return;
3530 }
3531
3532 /*
3533 * Use P2P find, if needed, to find the other device from its listen
3534 * channel.
3535 */
3536 p2p_set_state(p2p, P2P_CONNECT);
3537 timeout = success ? 500000 : 100000;
3538 if (!success && p2p->go_neg_peer &&
3539 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3540 unsigned int r;
3541 /*
3542 * Peer is expected to wait our response and we will skip the
3543 * listen phase. Add some randomness to the wait time here to
3544 * make it less likely to hit cases where we could end up in
3545 * sync with peer not listening.
3546 */
3547 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3548 r = 0;
3549 timeout += r % 100000;
3550 }
3551 p2p_set_timeout(p2p, 0, timeout);
3552 }
3553
3554
p2p_go_neg_resp_cb(struct p2p_data * p2p,int success)3555 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3556 {
3557 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3558 success);
3559 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3560 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3561 return;
3562 }
3563 p2p_set_state(p2p, P2P_CONNECT);
3564 p2p_set_timeout(p2p, 0, 500000);
3565 }
3566
3567
p2p_go_neg_resp_failure_cb(struct p2p_data * p2p,int success,const u8 * addr)3568 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3569 const u8 *addr)
3570 {
3571 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3572 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3573 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3574 return;
3575 }
3576
3577 if (success) {
3578 struct p2p_device *dev;
3579 dev = p2p_get_device(p2p, addr);
3580 if (dev &&
3581 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3582 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3583 }
3584
3585 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
3586 p2p_continue_find(p2p);
3587 }
3588
3589
p2p_go_neg_conf_cb(struct p2p_data * p2p,enum p2p_send_action_result result)3590 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3591 enum p2p_send_action_result result)
3592 {
3593 struct p2p_device *dev;
3594
3595 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3596 if (result == P2P_SEND_ACTION_FAILED) {
3597 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3598 p2p_go_neg_failed(p2p, -1);
3599 return;
3600 }
3601
3602 dev = p2p->go_neg_peer;
3603
3604 if (result == P2P_SEND_ACTION_NO_ACK) {
3605 /*
3606 * Retry GO Negotiation Confirmation
3607 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3608 * ACK for confirmation.
3609 */
3610 if (dev && dev->go_neg_conf &&
3611 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3612 p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3613 dev->go_neg_conf_sent);
3614 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3615 if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3616 dev->info.p2p_device_addr,
3617 p2p->cfg->dev_addr,
3618 dev->info.p2p_device_addr,
3619 wpabuf_head(dev->go_neg_conf),
3620 wpabuf_len(dev->go_neg_conf), 0) >=
3621 0) {
3622 dev->go_neg_conf_sent++;
3623 return;
3624 }
3625 p2p_dbg(p2p, "Failed to re-send Action frame");
3626
3627 /*
3628 * Continue with the assumption that the first attempt
3629 * went through and just the ACK frame was lost.
3630 */
3631 }
3632
3633 /*
3634 * It looks like the TX status for GO Negotiation Confirm is
3635 * often showing failure even when the peer has actually
3636 * received the frame. Since the peer may change channels
3637 * immediately after having received the frame, we may not see
3638 * an Ack for retries, so just dropping a single frame may
3639 * trigger this. To allow the group formation to succeed if the
3640 * peer did indeed receive the frame, continue regardless of
3641 * the TX status.
3642 */
3643 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3644 }
3645
3646 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3647
3648 if (dev == NULL)
3649 return;
3650
3651 p2p_go_complete(p2p, dev);
3652 }
3653
3654
p2p_send_action_cb(struct p2p_data * p2p,unsigned int freq,const u8 * dst,const u8 * src,const u8 * bssid,enum p2p_send_action_result result)3655 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3656 const u8 *src, const u8 *bssid,
3657 enum p2p_send_action_result result)
3658 {
3659 enum p2p_pending_action_state state;
3660 int success;
3661
3662 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3663 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
3664 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3665 MAC2STR(bssid), result, p2p_state_txt(p2p->state));
3666 success = result == P2P_SEND_ACTION_SUCCESS;
3667 state = p2p->pending_action_state;
3668 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3669 switch (state) {
3670 case P2P_NO_PENDING_ACTION:
3671 if (p2p->send_action_in_progress) {
3672 p2p->send_action_in_progress = 0;
3673 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3674 }
3675 p2p_check_after_scan_tx_continuation(p2p);
3676 break;
3677 case P2P_PENDING_GO_NEG_REQUEST:
3678 p2p_go_neg_req_cb(p2p, success);
3679 break;
3680 case P2P_PENDING_GO_NEG_RESPONSE:
3681 p2p_go_neg_resp_cb(p2p, success);
3682 break;
3683 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3684 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3685 break;
3686 case P2P_PENDING_GO_NEG_CONFIRM:
3687 p2p_go_neg_conf_cb(p2p, result);
3688 break;
3689 case P2P_PENDING_SD:
3690 p2p_sd_cb(p2p, success);
3691 break;
3692 case P2P_PENDING_PD:
3693 p2p_prov_disc_cb(p2p, success);
3694 break;
3695 case P2P_PENDING_PD_RESPONSE:
3696 p2p_prov_disc_resp_cb(p2p, success);
3697 break;
3698 case P2P_PENDING_INVITATION_REQUEST:
3699 p2p_invitation_req_cb(p2p, success);
3700 break;
3701 case P2P_PENDING_INVITATION_RESPONSE:
3702 p2p_invitation_resp_cb(p2p, success);
3703 break;
3704 case P2P_PENDING_DEV_DISC_REQUEST:
3705 p2p_dev_disc_req_cb(p2p, success);
3706 break;
3707 case P2P_PENDING_DEV_DISC_RESPONSE:
3708 p2p_dev_disc_resp_cb(p2p, success);
3709 break;
3710 case P2P_PENDING_GO_DISC_REQ:
3711 p2p_go_disc_req_cb(p2p, success);
3712 break;
3713 }
3714
3715 p2p->after_scan_tx_in_progress = 0;
3716 }
3717
3718
p2p_listen_cb(struct p2p_data * p2p,unsigned int freq,unsigned int duration)3719 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3720 unsigned int duration)
3721 {
3722 if (freq == p2p->pending_client_disc_freq) {
3723 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3724 p2p->pending_client_disc_freq = 0;
3725 return;
3726 }
3727
3728 if (freq != p2p->pending_listen_freq) {
3729 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3730 freq, duration, p2p->pending_listen_freq);
3731 return;
3732 }
3733
3734 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3735 p2p->pending_listen_sec, p2p->pending_listen_usec,
3736 p2p->pending_listen_freq);
3737 p2p->in_listen = 1;
3738 p2p->drv_in_listen = freq;
3739 if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3740 /*
3741 * Add 20 msec extra wait to avoid race condition with driver
3742 * remain-on-channel end event, i.e., give driver more time to
3743 * complete the operation before our timeout expires.
3744 */
3745 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3746 p2p->pending_listen_usec + 20000);
3747 }
3748
3749 p2p->pending_listen_freq = 0;
3750 }
3751
3752
p2p_listen_end(struct p2p_data * p2p,unsigned int freq)3753 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3754 {
3755 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3756 p2p->drv_in_listen = 0;
3757 if (p2p->in_listen)
3758 return 0; /* Internal timeout will trigger the next step */
3759
3760 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3761 if (p2p->go_neg_peer->connect_reqs >= 120) {
3762 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3763 p2p_go_neg_failed(p2p, -1);
3764 return 0;
3765 }
3766
3767 p2p_set_state(p2p, P2P_CONNECT);
3768 p2p_connect_send(p2p, p2p->go_neg_peer);
3769 return 1;
3770 } else if (p2p->state == P2P_SEARCH) {
3771 if (p2p->p2p_scan_running) {
3772 /*
3773 * Search is already in progress. This can happen if
3774 * an Action frame RX is reported immediately after
3775 * the end of a remain-on-channel operation and the
3776 * response frame to that is sent using an offchannel
3777 * operation while in p2p_find. Avoid an attempt to
3778 * restart a scan here.
3779 */
3780 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3781 return 1;
3782 }
3783 if (p2p->pending_listen_freq) {
3784 /*
3785 * Better wait a bit if the driver is unable to start
3786 * offchannel operation for some reason. p2p_search()
3787 * will be started from internal timeout.
3788 */
3789 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3790 p2p_set_timeout(p2p, 0, 100000);
3791 return 1;
3792 }
3793 if (p2p->search_delay) {
3794 p2p_dbg(p2p, "Delay search operation by %u ms",
3795 p2p->search_delay);
3796 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3797 (p2p->search_delay % 1000) * 1000);
3798 return 1;
3799 }
3800 p2p_search(p2p);
3801 return 1;
3802 }
3803
3804 return 0;
3805 }
3806
3807
p2p_timeout_connect(struct p2p_data * p2p)3808 static void p2p_timeout_connect(struct p2p_data *p2p)
3809 {
3810 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3811 if (p2p->go_neg_peer &&
3812 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3813 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3814 p2p_go_neg_failed(p2p, -1);
3815 return;
3816 }
3817 if (p2p->go_neg_peer &&
3818 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3819 p2p->go_neg_peer->connect_reqs < 120) {
3820 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3821 p2p_connect_send(p2p, p2p->go_neg_peer);
3822 return;
3823 }
3824 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3825 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3826 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3827 p2p_set_timeout(p2p, 0, 30000);
3828 return;
3829 }
3830 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3831 p2p_listen_in_find(p2p, 0);
3832 }
3833
3834
p2p_timeout_connect_listen(struct p2p_data * p2p)3835 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3836 {
3837 if (p2p->go_neg_peer) {
3838 if (p2p->drv_in_listen) {
3839 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3840 return;
3841 }
3842
3843 if (p2p->go_neg_peer->connect_reqs >= 120) {
3844 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3845 p2p_go_neg_failed(p2p, -1);
3846 return;
3847 }
3848
3849 p2p_set_state(p2p, P2P_CONNECT);
3850 p2p_connect_send(p2p, p2p->go_neg_peer);
3851 } else
3852 p2p_set_state(p2p, P2P_IDLE);
3853 }
3854
3855
p2p_timeout_wait_peer_connect(struct p2p_data * p2p)3856 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3857 {
3858 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3859
3860 if (p2p->cfg->is_concurrent_session_active &&
3861 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3862 p2p_set_timeout(p2p, 0, 500000);
3863 else
3864 p2p_set_timeout(p2p, 0, 200000);
3865 }
3866
3867
p2p_timeout_wait_peer_idle(struct p2p_data * p2p)3868 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3869 {
3870 struct p2p_device *dev = p2p->go_neg_peer;
3871
3872 if (dev == NULL) {
3873 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3874 return;
3875 }
3876
3877 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3878 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3879 p2p_listen_in_find(p2p, 0);
3880 }
3881
3882
p2p_timeout_sd_during_find(struct p2p_data * p2p)3883 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3884 {
3885 p2p_dbg(p2p, "Service Discovery Query timeout");
3886 if (p2p->sd_peer) {
3887 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3888 p2p->sd_peer = NULL;
3889 }
3890 p2p_continue_find(p2p);
3891 }
3892
3893
p2p_timeout_prov_disc_during_find(struct p2p_data * p2p)3894 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3895 {
3896 p2p_dbg(p2p, "Provision Discovery Request timeout");
3897 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3898 p2p_continue_find(p2p);
3899 }
3900
3901
p2p_timeout_prov_disc_req(struct p2p_data * p2p)3902 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3903 {
3904 u32 adv_id = 0;
3905 u8 *adv_mac = NULL;
3906
3907 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3908
3909 /*
3910 * For user initiated PD requests that we have not gotten any responses
3911 * for while in IDLE state, we retry them a couple of times before
3912 * giving up.
3913 */
3914 if (!p2p->user_initiated_pd)
3915 return;
3916
3917 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3918
3919 if (p2p->pd_retries) {
3920 p2p->pd_retries--;
3921 p2p_retry_pd(p2p);
3922 } else {
3923 struct p2p_device *dev;
3924 int for_join = 0;
3925
3926 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3927 if (os_memcmp(p2p->pending_pd_devaddr,
3928 dev->info.p2p_device_addr, ETH_ALEN) != 0)
3929 continue;
3930 if (dev->req_config_methods &&
3931 (dev->flags & P2P_DEV_PD_FOR_JOIN))
3932 for_join = 1;
3933 }
3934
3935 if (p2p->p2ps_prov) {
3936 adv_id = p2p->p2ps_prov->adv_id;
3937 adv_mac = p2p->p2ps_prov->adv_mac;
3938 }
3939
3940 if (p2p->cfg->prov_disc_fail)
3941 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3942 p2p->pending_pd_devaddr,
3943 for_join ?
3944 P2P_PROV_DISC_TIMEOUT_JOIN :
3945 P2P_PROV_DISC_TIMEOUT,
3946 adv_id, adv_mac, NULL);
3947 p2p_reset_pending_pd(p2p);
3948 }
3949 }
3950
3951
p2p_timeout_invite(struct p2p_data * p2p)3952 static void p2p_timeout_invite(struct p2p_data *p2p)
3953 {
3954 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3955 p2p_set_state(p2p, P2P_INVITE_LISTEN);
3956 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3957 /*
3958 * Better remain on operating channel instead of listen channel
3959 * when running a group.
3960 */
3961 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3962 p2p_set_timeout(p2p, 0, 100000);
3963 return;
3964 }
3965 p2p_listen_in_find(p2p, 0);
3966 }
3967
3968
p2p_timeout_invite_listen(struct p2p_data * p2p)3969 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3970 {
3971 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3972 p2p_set_state(p2p, P2P_INVITE);
3973 p2p_invite_send(p2p, p2p->invite_peer,
3974 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3975 } else {
3976 if (p2p->invite_peer) {
3977 p2p_dbg(p2p, "Invitation Request retry limit reached");
3978 if (p2p->cfg->invitation_result)
3979 p2p->cfg->invitation_result(
3980 p2p->cfg->cb_ctx, -1, NULL, NULL,
3981 p2p->invite_peer->info.p2p_device_addr,
3982 0, 0);
3983 }
3984 p2p_set_state(p2p, P2P_IDLE);
3985 }
3986 }
3987
3988
p2p_state_timeout(void * eloop_ctx,void * timeout_ctx)3989 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3990 {
3991 struct p2p_data *p2p = eloop_ctx;
3992
3993 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3994
3995 p2p->in_listen = 0;
3996 if (p2p->drv_in_listen) {
3997 p2p_dbg(p2p, "Driver is still in listen state - stop it");
3998 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
3999 }
4000
4001 switch (p2p->state) {
4002 case P2P_IDLE:
4003 /* Check if we timed out waiting for PD req */
4004 if (p2p->pending_action_state == P2P_PENDING_PD)
4005 p2p_timeout_prov_disc_req(p2p);
4006 break;
4007 case P2P_SEARCH:
4008 /* Check if we timed out waiting for PD req */
4009 if (p2p->pending_action_state == P2P_PENDING_PD)
4010 p2p_timeout_prov_disc_req(p2p);
4011 if (p2p->search_delay && !p2p->in_search_delay) {
4012 p2p_dbg(p2p, "Delay search operation by %u ms",
4013 p2p->search_delay);
4014 p2p->in_search_delay = 1;
4015 p2p_set_timeout(p2p, p2p->search_delay / 1000,
4016 (p2p->search_delay % 1000) * 1000);
4017 break;
4018 }
4019 p2p->in_search_delay = 0;
4020 p2p_search(p2p);
4021 break;
4022 case P2P_CONNECT:
4023 p2p_timeout_connect(p2p);
4024 break;
4025 case P2P_CONNECT_LISTEN:
4026 p2p_timeout_connect_listen(p2p);
4027 break;
4028 case P2P_GO_NEG:
4029 break;
4030 case P2P_LISTEN_ONLY:
4031 /* Check if we timed out waiting for PD req */
4032 if (p2p->pending_action_state == P2P_PENDING_PD)
4033 p2p_timeout_prov_disc_req(p2p);
4034
4035 if (p2p->ext_listen_only) {
4036 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
4037 p2p->ext_listen_only = 0;
4038 p2p_set_state(p2p, P2P_IDLE);
4039 }
4040 break;
4041 case P2P_WAIT_PEER_CONNECT:
4042 p2p_timeout_wait_peer_connect(p2p);
4043 break;
4044 case P2P_WAIT_PEER_IDLE:
4045 p2p_timeout_wait_peer_idle(p2p);
4046 break;
4047 case P2P_SD_DURING_FIND:
4048 p2p_timeout_sd_during_find(p2p);
4049 break;
4050 case P2P_PROVISIONING:
4051 break;
4052 case P2P_PD_DURING_FIND:
4053 p2p_timeout_prov_disc_during_find(p2p);
4054 break;
4055 case P2P_INVITE:
4056 p2p_timeout_invite(p2p);
4057 break;
4058 case P2P_INVITE_LISTEN:
4059 p2p_timeout_invite_listen(p2p);
4060 break;
4061 }
4062 }
4063
4064
p2p_reject(struct p2p_data * p2p,const u8 * peer_addr)4065 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
4066 {
4067 struct p2p_device *dev;
4068
4069 dev = p2p_get_device(p2p, peer_addr);
4070 p2p_dbg(p2p, "Local request to reject connection attempts by peer "
4071 MACSTR, MAC2STR(peer_addr));
4072 if (dev == NULL) {
4073 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
4074 return -1;
4075 }
4076 dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
4077 dev->flags |= P2P_DEV_USER_REJECTED;
4078 return 0;
4079 }
4080
4081
p2p_wps_method_text(enum p2p_wps_method method)4082 const char * p2p_wps_method_text(enum p2p_wps_method method)
4083 {
4084 switch (method) {
4085 case WPS_NOT_READY:
4086 return "not-ready";
4087 case WPS_PIN_DISPLAY:
4088 return "Display";
4089 case WPS_PIN_KEYPAD:
4090 return "Keypad";
4091 case WPS_PBC:
4092 return "PBC";
4093 case WPS_NFC:
4094 return "NFC";
4095 case WPS_P2PS:
4096 return "P2PS";
4097 }
4098
4099 return "??";
4100 }
4101
4102
p2p_go_state_text(enum p2p_go_state go_state)4103 static const char * p2p_go_state_text(enum p2p_go_state go_state)
4104 {
4105 switch (go_state) {
4106 case UNKNOWN_GO:
4107 return "unknown";
4108 case LOCAL_GO:
4109 return "local";
4110 case REMOTE_GO:
4111 return "remote";
4112 }
4113
4114 return "??";
4115 }
4116
4117
p2p_get_peer_info(struct p2p_data * p2p,const u8 * addr,int next)4118 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
4119 const u8 *addr, int next)
4120 {
4121 struct p2p_device *dev;
4122
4123 if (addr)
4124 dev = p2p_get_device(p2p, addr);
4125 else
4126 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4127
4128 if (dev && next) {
4129 dev = dl_list_first(&dev->list, struct p2p_device, list);
4130 if (&dev->list == &p2p->devices)
4131 dev = NULL;
4132 }
4133
4134 if (dev == NULL)
4135 return NULL;
4136
4137 return &dev->info;
4138 }
4139
4140
p2p_get_peer_info_txt(const struct p2p_peer_info * info,char * buf,size_t buflen)4141 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
4142 char *buf, size_t buflen)
4143 {
4144 struct p2p_device *dev;
4145 int res;
4146 char *pos, *end;
4147 struct os_reltime now;
4148
4149 if (info == NULL)
4150 return -1;
4151
4152 dev = (struct p2p_device *) (((u8 *) info) -
4153 offsetof(struct p2p_device, info));
4154
4155 pos = buf;
4156 end = buf + buflen;
4157
4158 os_get_reltime(&now);
4159 res = os_snprintf(pos, end - pos,
4160 "age=%d\n"
4161 "listen_freq=%d\n"
4162 "wps_method=%s\n"
4163 "interface_addr=" MACSTR "\n"
4164 "member_in_go_dev=" MACSTR "\n"
4165 "member_in_go_iface=" MACSTR "\n"
4166 "go_neg_req_sent=%d\n"
4167 "go_state=%s\n"
4168 "dialog_token=%u\n"
4169 "intended_addr=" MACSTR "\n"
4170 "country=%c%c\n"
4171 "oper_freq=%d\n"
4172 "req_config_methods=0x%x\n"
4173 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
4174 "status=%d\n"
4175 "invitation_reqs=%u\n",
4176 (int) (now.sec - dev->last_seen.sec),
4177 dev->listen_freq,
4178 p2p_wps_method_text(dev->wps_method),
4179 MAC2STR(dev->interface_addr),
4180 MAC2STR(dev->member_in_go_dev),
4181 MAC2STR(dev->member_in_go_iface),
4182 dev->go_neg_req_sent,
4183 p2p_go_state_text(dev->go_state),
4184 dev->dialog_token,
4185 MAC2STR(dev->intended_addr),
4186 dev->country[0] ? dev->country[0] : '_',
4187 dev->country[1] ? dev->country[1] : '_',
4188 dev->oper_freq,
4189 dev->req_config_methods,
4190 dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
4191 "[PROBE_REQ_ONLY]" : "",
4192 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
4193 dev->flags & P2P_DEV_NOT_YET_READY ?
4194 "[NOT_YET_READY]" : "",
4195 dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
4196 "[PD_PEER_DISPLAY]" : "",
4197 dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
4198 "[PD_PEER_KEYPAD]" : "",
4199 dev->flags & P2P_DEV_PD_PEER_P2PS ?
4200 "[PD_PEER_P2PS]" : "",
4201 dev->flags & P2P_DEV_USER_REJECTED ?
4202 "[USER_REJECTED]" : "",
4203 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
4204 "[PEER_WAITING_RESPONSE]" : "",
4205 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
4206 "[PREFER_PERSISTENT_GROUP]" : "",
4207 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
4208 "[WAIT_GO_NEG_RESPONSE]" : "",
4209 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
4210 "[WAIT_GO_NEG_CONFIRM]" : "",
4211 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
4212 "[GROUP_CLIENT_ONLY]" : "",
4213 dev->flags & P2P_DEV_FORCE_FREQ ?
4214 "[FORCE_FREQ]" : "",
4215 dev->flags & P2P_DEV_PD_FOR_JOIN ?
4216 "[PD_FOR_JOIN]" : "",
4217 dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT ?
4218 "[LAST_SEEN_AS_GROUP_CLIENT]" : "",
4219 dev->status,
4220 dev->invitation_reqs);
4221 if (os_snprintf_error(end - pos, res))
4222 return pos - buf;
4223 pos += res;
4224
4225 if (dev->ext_listen_period) {
4226 res = os_snprintf(pos, end - pos,
4227 "ext_listen_period=%u\n"
4228 "ext_listen_interval=%u\n",
4229 dev->ext_listen_period,
4230 dev->ext_listen_interval);
4231 if (os_snprintf_error(end - pos, res))
4232 return pos - buf;
4233 pos += res;
4234 }
4235
4236 if (dev->oper_ssid_len) {
4237 res = os_snprintf(pos, end - pos,
4238 "oper_ssid=%s\n",
4239 wpa_ssid_txt(dev->oper_ssid,
4240 dev->oper_ssid_len));
4241 if (os_snprintf_error(end - pos, res))
4242 return pos - buf;
4243 pos += res;
4244 }
4245
4246 #ifdef CONFIG_WIFI_DISPLAY
4247 if (dev->info.wfd_subelems) {
4248 res = os_snprintf(pos, end - pos, "wfd_subelems=");
4249 if (os_snprintf_error(end - pos, res))
4250 return pos - buf;
4251 pos += res;
4252
4253 pos += wpa_snprintf_hex(pos, end - pos,
4254 wpabuf_head(dev->info.wfd_subelems),
4255 wpabuf_len(dev->info.wfd_subelems));
4256
4257 res = os_snprintf(pos, end - pos, "\n");
4258 if (os_snprintf_error(end - pos, res))
4259 return pos - buf;
4260 pos += res;
4261 }
4262 #endif /* CONFIG_WIFI_DISPLAY */
4263
4264 return pos - buf;
4265 }
4266
4267
p2p_peer_known(struct p2p_data * p2p,const u8 * addr)4268 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
4269 {
4270 return p2p_get_device(p2p, addr) != NULL;
4271 }
4272
4273
p2p_set_client_discoverability(struct p2p_data * p2p,int enabled)4274 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
4275 {
4276 if (enabled) {
4277 p2p_dbg(p2p, "Client discoverability enabled");
4278 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4279 } else {
4280 p2p_dbg(p2p, "Client discoverability disabled");
4281 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4282 }
4283 }
4284
4285
p2p_build_presence_req(u32 duration1,u32 interval1,u32 duration2,u32 interval2)4286 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
4287 u32 duration2, u32 interval2)
4288 {
4289 struct wpabuf *req;
4290 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
4291 u8 *len;
4292
4293 req = wpabuf_alloc(100);
4294 if (req == NULL)
4295 return NULL;
4296
4297 if (duration1 || interval1) {
4298 os_memset(&desc1, 0, sizeof(desc1));
4299 desc1.count_type = 1;
4300 desc1.duration = duration1;
4301 desc1.interval = interval1;
4302 ptr1 = &desc1;
4303
4304 if (duration2 || interval2) {
4305 os_memset(&desc2, 0, sizeof(desc2));
4306 desc2.count_type = 2;
4307 desc2.duration = duration2;
4308 desc2.interval = interval2;
4309 ptr2 = &desc2;
4310 }
4311 }
4312
4313 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
4314 len = p2p_buf_add_ie_hdr(req);
4315 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
4316 p2p_buf_update_ie_hdr(req, len);
4317
4318 return req;
4319 }
4320
4321
p2p_presence_req(struct p2p_data * p2p,const u8 * go_interface_addr,const u8 * own_interface_addr,unsigned int freq,u32 duration1,u32 interval1,u32 duration2,u32 interval2)4322 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
4323 const u8 *own_interface_addr, unsigned int freq,
4324 u32 duration1, u32 interval1, u32 duration2,
4325 u32 interval2)
4326 {
4327 struct wpabuf *req;
4328
4329 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
4330 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
4331 "dur2=%u int2=%u",
4332 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
4333 freq, duration1, interval1, duration2, interval2);
4334
4335 req = p2p_build_presence_req(duration1, interval1, duration2,
4336 interval2);
4337 if (req == NULL)
4338 return -1;
4339
4340 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4341 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
4342 go_interface_addr,
4343 wpabuf_head(req), wpabuf_len(req), 200) < 0) {
4344 p2p_dbg(p2p, "Failed to send Action frame");
4345 }
4346 wpabuf_free(req);
4347
4348 return 0;
4349 }
4350
4351
p2p_build_presence_resp(u8 status,const u8 * noa,size_t noa_len,u8 dialog_token)4352 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
4353 size_t noa_len, u8 dialog_token)
4354 {
4355 struct wpabuf *resp;
4356 u8 *len;
4357
4358 resp = wpabuf_alloc(100 + noa_len);
4359 if (resp == NULL)
4360 return NULL;
4361
4362 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
4363 len = p2p_buf_add_ie_hdr(resp);
4364 p2p_buf_add_status(resp, status);
4365 if (noa) {
4366 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
4367 wpabuf_put_le16(resp, noa_len);
4368 wpabuf_put_data(resp, noa, noa_len);
4369 } else
4370 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
4371 p2p_buf_update_ie_hdr(resp, len);
4372
4373 return resp;
4374 }
4375
4376
p2p_process_presence_req(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len,int rx_freq)4377 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
4378 const u8 *sa, const u8 *data, size_t len,
4379 int rx_freq)
4380 {
4381 struct p2p_message msg;
4382 u8 status;
4383 struct wpabuf *resp;
4384 size_t g;
4385 struct p2p_group *group = NULL;
4386 int parsed = 0;
4387 u8 noa[50];
4388 int noa_len;
4389
4390 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
4391
4392 for (g = 0; g < p2p->num_groups; g++) {
4393 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
4394 ETH_ALEN) == 0) {
4395 group = p2p->groups[g];
4396 break;
4397 }
4398 }
4399 if (group == NULL) {
4400 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
4401 MACSTR, MAC2STR(da));
4402 return;
4403 }
4404
4405 if (p2p_parse(data, len, &msg) < 0) {
4406 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
4407 status = P2P_SC_FAIL_INVALID_PARAMS;
4408 goto fail;
4409 }
4410 parsed = 1;
4411
4412 if (msg.noa == NULL) {
4413 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
4414 status = P2P_SC_FAIL_INVALID_PARAMS;
4415 goto fail;
4416 }
4417
4418 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
4419
4420 fail:
4421 if (p2p->cfg->get_noa)
4422 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
4423 sizeof(noa));
4424 else
4425 noa_len = -1;
4426 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
4427 noa_len > 0 ? noa_len : 0,
4428 msg.dialog_token);
4429 if (parsed)
4430 p2p_parse_free(&msg);
4431 if (resp == NULL)
4432 return;
4433
4434 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4435 if (p2p_send_action(p2p, rx_freq, sa, da, da,
4436 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
4437 p2p_dbg(p2p, "Failed to send Action frame");
4438 }
4439 wpabuf_free(resp);
4440 }
4441
4442
p2p_process_presence_resp(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len)4443 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
4444 const u8 *sa, const u8 *data, size_t len)
4445 {
4446 struct p2p_message msg;
4447
4448 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
4449
4450 if (p2p_parse(data, len, &msg) < 0) {
4451 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
4452 return;
4453 }
4454
4455 if (msg.status == NULL || msg.noa == NULL) {
4456 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
4457 p2p_parse_free(&msg);
4458 return;
4459 }
4460
4461 if (p2p->cfg->presence_resp) {
4462 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4463 msg.noa, msg.noa_len);
4464 }
4465
4466 if (*msg.status) {
4467 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4468 *msg.status);
4469 p2p_parse_free(&msg);
4470 return;
4471 }
4472
4473 p2p_dbg(p2p, "P2P Presence Request was accepted");
4474 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4475 msg.noa, msg.noa_len);
4476 /* TODO: process NoA */
4477 p2p_parse_free(&msg);
4478 }
4479
4480
p2p_ext_listen_timeout(void * eloop_ctx,void * timeout_ctx)4481 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4482 {
4483 struct p2p_data *p2p = eloop_ctx;
4484
4485 if (p2p->ext_listen_interval) {
4486 /* Schedule next extended listen timeout */
4487 eloop_register_timeout(p2p->ext_listen_interval_sec,
4488 p2p->ext_listen_interval_usec,
4489 p2p_ext_listen_timeout, p2p, NULL);
4490 }
4491
4492 if ((p2p->cfg->is_p2p_in_progress &&
4493 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4494 (p2p->pending_action_state == P2P_PENDING_PD &&
4495 p2p->pd_retries > 0)) {
4496 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4497 p2p_state_txt(p2p->state));
4498 return;
4499 }
4500
4501 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4502 /*
4503 * This should not really happen, but it looks like the Listen
4504 * command may fail is something else (e.g., a scan) was
4505 * running at an inconvenient time. As a workaround, allow new
4506 * Extended Listen operation to be started.
4507 */
4508 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4509 p2p->ext_listen_only = 0;
4510 p2p_set_state(p2p, P2P_IDLE);
4511 }
4512
4513 if (p2p->state != P2P_IDLE) {
4514 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4515 return;
4516 }
4517
4518 p2p_dbg(p2p, "Extended Listen timeout");
4519 p2p->ext_listen_only = 1;
4520 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4521 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4522 p2p->ext_listen_only = 0;
4523 }
4524 }
4525
4526
p2p_ext_listen(struct p2p_data * p2p,unsigned int period,unsigned int interval)4527 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4528 unsigned int interval)
4529 {
4530 if (period > 65535 || interval > 65535 || period > interval ||
4531 (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4532 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4533 period, interval);
4534 return -1;
4535 }
4536
4537 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4538
4539 if (interval == 0) {
4540 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4541 p2p->ext_listen_period = 0;
4542 p2p->ext_listen_interval = 0;
4543 return 0;
4544 }
4545
4546 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4547 period, interval);
4548 p2p->ext_listen_period = period;
4549 p2p->ext_listen_interval = interval;
4550 p2p->ext_listen_interval_sec = interval / 1000;
4551 p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4552
4553 eloop_register_timeout(p2p->ext_listen_interval_sec,
4554 p2p->ext_listen_interval_usec,
4555 p2p_ext_listen_timeout, p2p, NULL);
4556
4557 return 0;
4558 }
4559
4560
p2p_deauth_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)4561 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4562 const u8 *ie, size_t ie_len)
4563 {
4564 struct p2p_message msg;
4565
4566 if (bssid == NULL || ie == NULL)
4567 return;
4568
4569 os_memset(&msg, 0, sizeof(msg));
4570 if (p2p_parse_ies(ie, ie_len, &msg))
4571 return;
4572 if (msg.minor_reason_code == NULL) {
4573 p2p_parse_free(&msg);
4574 return;
4575 }
4576
4577 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4578 " reason_code=%u minor_reason_code=%u",
4579 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4580
4581 p2p_parse_free(&msg);
4582 }
4583
4584
p2p_disassoc_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)4585 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4586 const u8 *ie, size_t ie_len)
4587 {
4588 struct p2p_message msg;
4589
4590 if (bssid == NULL || ie == NULL)
4591 return;
4592
4593 os_memset(&msg, 0, sizeof(msg));
4594 if (p2p_parse_ies(ie, ie_len, &msg))
4595 return;
4596 if (msg.minor_reason_code == NULL) {
4597 p2p_parse_free(&msg);
4598 return;
4599 }
4600
4601 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4602 " reason_code=%u minor_reason_code=%u",
4603 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4604
4605 p2p_parse_free(&msg);
4606 }
4607
4608
p2p_set_managed_oper(struct p2p_data * p2p,int enabled)4609 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4610 {
4611 if (enabled) {
4612 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4613 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4614 } else {
4615 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4616 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4617 }
4618 }
4619
4620
p2p_config_get_random_social(struct p2p_config * p2p,u8 * op_class,u8 * op_channel)4621 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4622 u8 *op_channel)
4623 {
4624 return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4625 }
4626
4627
p2p_set_listen_channel(struct p2p_data * p2p,u8 reg_class,u8 channel,u8 forced)4628 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4629 u8 forced)
4630 {
4631 if (p2p_channel_to_freq(reg_class, channel) < 0)
4632 return -1;
4633
4634 /*
4635 * Listen channel was set in configuration or set by control interface;
4636 * cannot override it.
4637 */
4638 if (p2p->cfg->channel_forced && forced == 0) {
4639 p2p_dbg(p2p,
4640 "Listen channel was previously configured - do not override based on optimization");
4641 return -1;
4642 }
4643
4644 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4645 reg_class, channel);
4646
4647 if (p2p->state == P2P_IDLE) {
4648 p2p->cfg->reg_class = reg_class;
4649 p2p->cfg->channel = channel;
4650 p2p->cfg->channel_forced = forced;
4651 } else {
4652 p2p_dbg(p2p, "Defer setting listen channel");
4653 p2p->pending_reg_class = reg_class;
4654 p2p->pending_channel = channel;
4655 p2p->pending_channel_forced = forced;
4656 }
4657
4658 return 0;
4659 }
4660
4661
p2p_get_listen_channel(struct p2p_data * p2p)4662 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4663 {
4664 return p2p->cfg->channel;
4665 }
4666
4667
p2p_set_ssid_postfix(struct p2p_data * p2p,const u8 * postfix,size_t len)4668 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4669 {
4670 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4671 if (postfix == NULL) {
4672 p2p->cfg->ssid_postfix_len = 0;
4673 return 0;
4674 }
4675 if (len > sizeof(p2p->cfg->ssid_postfix))
4676 return -1;
4677 os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4678 p2p->cfg->ssid_postfix_len = len;
4679 return 0;
4680 }
4681
4682
p2p_set_oper_channel(struct p2p_data * p2p,u8 op_reg_class,u8 op_channel,int cfg_op_channel)4683 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4684 int cfg_op_channel)
4685 {
4686 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4687 return -1;
4688
4689 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4690 op_reg_class, op_channel);
4691 p2p->cfg->op_reg_class = op_reg_class;
4692 p2p->cfg->op_channel = op_channel;
4693 p2p->cfg->cfg_op_channel = cfg_op_channel;
4694 return 0;
4695 }
4696
4697
p2p_set_pref_chan(struct p2p_data * p2p,unsigned int num_pref_chan,const struct p2p_channel * pref_chan)4698 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4699 const struct p2p_channel *pref_chan)
4700 {
4701 struct p2p_channel *n;
4702
4703 if (pref_chan) {
4704 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4705 if (n == NULL)
4706 return -1;
4707 os_memcpy(n, pref_chan,
4708 num_pref_chan * sizeof(struct p2p_channel));
4709 } else
4710 n = NULL;
4711
4712 os_free(p2p->cfg->pref_chan);
4713 p2p->cfg->pref_chan = n;
4714 p2p->cfg->num_pref_chan = num_pref_chan;
4715
4716 return 0;
4717 }
4718
4719
p2p_set_no_go_freq(struct p2p_data * p2p,const struct wpa_freq_range_list * list)4720 int p2p_set_no_go_freq(struct p2p_data *p2p,
4721 const struct wpa_freq_range_list *list)
4722 {
4723 struct wpa_freq_range *tmp;
4724
4725 if (list == NULL || list->num == 0) {
4726 os_free(p2p->no_go_freq.range);
4727 p2p->no_go_freq.range = NULL;
4728 p2p->no_go_freq.num = 0;
4729 return 0;
4730 }
4731
4732 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4733 if (tmp == NULL)
4734 return -1;
4735 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4736 os_free(p2p->no_go_freq.range);
4737 p2p->no_go_freq.range = tmp;
4738 p2p->no_go_freq.num = list->num;
4739 p2p_dbg(p2p, "Updated no GO chan list");
4740
4741 return 0;
4742 }
4743
4744
p2p_get_interface_addr(struct p2p_data * p2p,const u8 * dev_addr,u8 * iface_addr)4745 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4746 u8 *iface_addr)
4747 {
4748 struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4749 if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4750 return -1;
4751 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4752 return 0;
4753 }
4754
4755
p2p_get_dev_addr(struct p2p_data * p2p,const u8 * iface_addr,u8 * dev_addr)4756 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4757 u8 *dev_addr)
4758 {
4759 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4760 if (dev == NULL)
4761 return -1;
4762 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4763 return 0;
4764 }
4765
4766
p2p_set_peer_filter(struct p2p_data * p2p,const u8 * addr)4767 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4768 {
4769 os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4770 if (is_zero_ether_addr(p2p->peer_filter))
4771 p2p_dbg(p2p, "Disable peer filter");
4772 else
4773 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4774 MAC2STR(p2p->peer_filter));
4775 }
4776
4777
p2p_set_cross_connect(struct p2p_data * p2p,int enabled)4778 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4779 {
4780 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4781 if (p2p->cross_connect == enabled)
4782 return;
4783 p2p->cross_connect = enabled;
4784 /* TODO: may need to tear down any action group where we are GO(?) */
4785 }
4786
4787
p2p_get_oper_freq(struct p2p_data * p2p,const u8 * iface_addr)4788 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4789 {
4790 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4791 if (dev == NULL)
4792 return -1;
4793 if (dev->oper_freq <= 0)
4794 return -1;
4795 return dev->oper_freq;
4796 }
4797
4798
p2p_set_intra_bss_dist(struct p2p_data * p2p,int enabled)4799 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4800 {
4801 p2p_dbg(p2p, "Intra BSS distribution %s",
4802 enabled ? "enabled" : "disabled");
4803 p2p->cfg->p2p_intra_bss = enabled;
4804 }
4805
4806
p2p_update_channel_list(struct p2p_data * p2p,const struct p2p_channels * chan,const struct p2p_channels * cli_chan)4807 void p2p_update_channel_list(struct p2p_data *p2p,
4808 const struct p2p_channels *chan,
4809 const struct p2p_channels *cli_chan)
4810 {
4811 p2p_dbg(p2p, "Update channel list");
4812 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4813 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4814 os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4815 sizeof(struct p2p_channels));
4816 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4817 }
4818
4819
p2p_send_action(struct p2p_data * p2p,unsigned int freq,const u8 * dst,const u8 * src,const u8 * bssid,const u8 * buf,size_t len,unsigned int wait_time)4820 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4821 const u8 *src, const u8 *bssid, const u8 *buf,
4822 size_t len, unsigned int wait_time)
4823 {
4824 if (p2p->p2p_scan_running) {
4825 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4826 if (p2p->after_scan_tx) {
4827 p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4828 os_free(p2p->after_scan_tx);
4829 }
4830 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4831 len);
4832 if (p2p->after_scan_tx == NULL)
4833 return -1;
4834 p2p->after_scan_tx->freq = freq;
4835 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4836 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4837 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4838 p2p->after_scan_tx->len = len;
4839 p2p->after_scan_tx->wait_time = wait_time;
4840 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4841 return 0;
4842 }
4843
4844 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4845 buf, len, wait_time);
4846 }
4847
4848
p2p_set_best_channels(struct p2p_data * p2p,int freq_24,int freq_5,int freq_overall)4849 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4850 int freq_overall)
4851 {
4852 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d",
4853 freq_24, freq_5, freq_overall);
4854 p2p->best_freq_24 = freq_24;
4855 p2p->best_freq_5 = freq_5;
4856 p2p->best_freq_overall = freq_overall;
4857 }
4858
4859
p2p_set_own_freq_preference(struct p2p_data * p2p,int freq)4860 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4861 {
4862 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4863 p2p->own_freq_preference = freq;
4864 }
4865
4866
p2p_get_go_neg_peer(struct p2p_data * p2p)4867 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4868 {
4869 if (p2p == NULL || p2p->go_neg_peer == NULL)
4870 return NULL;
4871 return p2p->go_neg_peer->info.p2p_device_addr;
4872 }
4873
4874
4875 const struct p2p_peer_info *
p2p_get_peer_found(struct p2p_data * p2p,const u8 * addr,int next)4876 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4877 {
4878 struct p2p_device *dev;
4879
4880 if (addr) {
4881 dev = p2p_get_device(p2p, addr);
4882 if (!dev)
4883 return NULL;
4884
4885 if (!next) {
4886 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4887 return NULL;
4888
4889 return &dev->info;
4890 } else {
4891 do {
4892 dev = dl_list_first(&dev->list,
4893 struct p2p_device,
4894 list);
4895 if (!dev || &dev->list == &p2p->devices)
4896 return NULL;
4897 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4898 }
4899 } else {
4900 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4901 if (!dev)
4902 return NULL;
4903 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4904 dev = dl_list_first(&dev->list,
4905 struct p2p_device,
4906 list);
4907 if (!dev || &dev->list == &p2p->devices)
4908 return NULL;
4909 }
4910 }
4911
4912 return &dev->info;
4913 }
4914
4915
p2p_in_progress(struct p2p_data * p2p)4916 int p2p_in_progress(struct p2p_data *p2p)
4917 {
4918 if (p2p == NULL)
4919 return 0;
4920 if (p2p->state == P2P_SEARCH)
4921 return 2;
4922 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4923 }
4924
4925
p2p_set_config_timeout(struct p2p_data * p2p,u8 go_timeout,u8 client_timeout)4926 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4927 u8 client_timeout)
4928 {
4929 if (p2p) {
4930 p2p->go_timeout = go_timeout;
4931 p2p->client_timeout = client_timeout;
4932 }
4933 }
4934
4935
4936 #ifdef CONFIG_WIFI_DISPLAY
4937
p2p_update_wfd_ie_groups(struct p2p_data * p2p)4938 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4939 {
4940 size_t g;
4941 struct p2p_group *group;
4942
4943 for (g = 0; g < p2p->num_groups; g++) {
4944 group = p2p->groups[g];
4945 p2p_group_force_beacon_update_ies(group);
4946 }
4947 }
4948
4949
p2p_set_wfd_ie_beacon(struct p2p_data * p2p,struct wpabuf * ie)4950 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4951 {
4952 wpabuf_free(p2p->wfd_ie_beacon);
4953 p2p->wfd_ie_beacon = ie;
4954 p2p_update_wfd_ie_groups(p2p);
4955 return 0;
4956 }
4957
4958
p2p_set_wfd_ie_probe_req(struct p2p_data * p2p,struct wpabuf * ie)4959 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4960 {
4961 wpabuf_free(p2p->wfd_ie_probe_req);
4962 p2p->wfd_ie_probe_req = ie;
4963 return 0;
4964 }
4965
4966
p2p_set_wfd_ie_probe_resp(struct p2p_data * p2p,struct wpabuf * ie)4967 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4968 {
4969 wpabuf_free(p2p->wfd_ie_probe_resp);
4970 p2p->wfd_ie_probe_resp = ie;
4971 p2p_update_wfd_ie_groups(p2p);
4972 return 0;
4973 }
4974
4975
p2p_set_wfd_ie_assoc_req(struct p2p_data * p2p,struct wpabuf * ie)4976 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4977 {
4978 wpabuf_free(p2p->wfd_ie_assoc_req);
4979 p2p->wfd_ie_assoc_req = ie;
4980 return 0;
4981 }
4982
4983
p2p_set_wfd_ie_invitation(struct p2p_data * p2p,struct wpabuf * ie)4984 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4985 {
4986 wpabuf_free(p2p->wfd_ie_invitation);
4987 p2p->wfd_ie_invitation = ie;
4988 return 0;
4989 }
4990
4991
p2p_set_wfd_ie_prov_disc_req(struct p2p_data * p2p,struct wpabuf * ie)4992 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4993 {
4994 wpabuf_free(p2p->wfd_ie_prov_disc_req);
4995 p2p->wfd_ie_prov_disc_req = ie;
4996 return 0;
4997 }
4998
4999
p2p_set_wfd_ie_prov_disc_resp(struct p2p_data * p2p,struct wpabuf * ie)5000 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
5001 {
5002 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
5003 p2p->wfd_ie_prov_disc_resp = ie;
5004 return 0;
5005 }
5006
5007
p2p_set_wfd_ie_go_neg(struct p2p_data * p2p,struct wpabuf * ie)5008 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
5009 {
5010 wpabuf_free(p2p->wfd_ie_go_neg);
5011 p2p->wfd_ie_go_neg = ie;
5012 return 0;
5013 }
5014
5015
p2p_set_wfd_dev_info(struct p2p_data * p2p,const struct wpabuf * elem)5016 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
5017 {
5018 wpabuf_free(p2p->wfd_dev_info);
5019 if (elem) {
5020 p2p->wfd_dev_info = wpabuf_dup(elem);
5021 if (p2p->wfd_dev_info == NULL)
5022 return -1;
5023 } else
5024 p2p->wfd_dev_info = NULL;
5025
5026 return 0;
5027 }
5028
5029
p2p_set_wfd_assoc_bssid(struct p2p_data * p2p,const struct wpabuf * elem)5030 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
5031 {
5032 wpabuf_free(p2p->wfd_assoc_bssid);
5033 if (elem) {
5034 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
5035 if (p2p->wfd_assoc_bssid == NULL)
5036 return -1;
5037 } else
5038 p2p->wfd_assoc_bssid = NULL;
5039
5040 return 0;
5041 }
5042
5043
p2p_set_wfd_coupled_sink_info(struct p2p_data * p2p,const struct wpabuf * elem)5044 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
5045 const struct wpabuf *elem)
5046 {
5047 wpabuf_free(p2p->wfd_coupled_sink_info);
5048 if (elem) {
5049 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
5050 if (p2p->wfd_coupled_sink_info == NULL)
5051 return -1;
5052 } else
5053 p2p->wfd_coupled_sink_info = NULL;
5054
5055 return 0;
5056 }
5057
5058 #endif /* CONFIG_WIFI_DISPLAY */
5059
5060
p2p_set_disc_int(struct p2p_data * p2p,int min_disc_int,int max_disc_int,int max_disc_tu)5061 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
5062 int max_disc_tu)
5063 {
5064 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
5065 return -1;
5066
5067 p2p->min_disc_int = min_disc_int;
5068 p2p->max_disc_int = max_disc_int;
5069 p2p->max_disc_tu = max_disc_tu;
5070 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
5071 min_disc_int, max_disc_int, max_disc_tu);
5072
5073 return 0;
5074 }
5075
5076
p2p_dbg(struct p2p_data * p2p,const char * fmt,...)5077 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
5078 {
5079 va_list ap;
5080 char buf[500];
5081
5082 if (!p2p->cfg->debug_print)
5083 return;
5084
5085 va_start(ap, fmt);
5086 vsnprintf(buf, sizeof(buf), fmt, ap);
5087 buf[sizeof(buf) - 1] = '\0';
5088 va_end(ap);
5089 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
5090 }
5091
5092
p2p_info(struct p2p_data * p2p,const char * fmt,...)5093 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
5094 {
5095 va_list ap;
5096 char buf[500];
5097
5098 if (!p2p->cfg->debug_print)
5099 return;
5100
5101 va_start(ap, fmt);
5102 vsnprintf(buf, sizeof(buf), fmt, ap);
5103 buf[sizeof(buf) - 1] = '\0';
5104 va_end(ap);
5105 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
5106 }
5107
5108
p2p_err(struct p2p_data * p2p,const char * fmt,...)5109 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
5110 {
5111 va_list ap;
5112 char buf[500];
5113
5114 if (!p2p->cfg->debug_print)
5115 return;
5116
5117 va_start(ap, fmt);
5118 vsnprintf(buf, sizeof(buf), fmt, ap);
5119 buf[sizeof(buf) - 1] = '\0';
5120 va_end(ap);
5121 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
5122 }
5123
5124
p2p_loop_on_known_peers(struct p2p_data * p2p,void (* peer_callback)(struct p2p_peer_info * peer,void * user_data),void * user_data)5125 void p2p_loop_on_known_peers(struct p2p_data *p2p,
5126 void (*peer_callback)(struct p2p_peer_info *peer,
5127 void *user_data),
5128 void *user_data)
5129 {
5130 struct p2p_device *dev, *n;
5131
5132 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
5133 peer_callback(&dev->info, user_data);
5134 }
5135 }
5136
5137
5138 #ifdef CONFIG_WPS_NFC
5139
p2p_build_nfc_handover(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5140 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
5141 int client_freq,
5142 const u8 *go_dev_addr,
5143 const u8 *ssid, size_t ssid_len)
5144 {
5145 struct wpabuf *buf;
5146 u8 op_class, channel;
5147 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
5148
5149 buf = wpabuf_alloc(1000);
5150 if (buf == NULL)
5151 return NULL;
5152
5153 op_class = p2p->cfg->reg_class;
5154 channel = p2p->cfg->channel;
5155
5156 p2p_buf_add_capability(buf, p2p->dev_capab &
5157 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
5158 p2p_buf_add_device_info(buf, p2p, NULL);
5159
5160 if (p2p->num_groups > 0) {
5161 int freq = p2p_group_get_freq(p2p->groups[0]);
5162 role = P2P_GO_IN_A_GROUP;
5163 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
5164 p2p_dbg(p2p,
5165 "Unknown GO operating frequency %d MHz for NFC handover",
5166 freq);
5167 wpabuf_free(buf);
5168 return NULL;
5169 }
5170 } else if (client_freq > 0) {
5171 role = P2P_CLIENT_IN_A_GROUP;
5172 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
5173 p2p_dbg(p2p,
5174 "Unknown client operating frequency %d MHz for NFC handover",
5175 client_freq);
5176 wpabuf_free(buf);
5177 return NULL;
5178 }
5179 }
5180
5181 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
5182 channel, role);
5183
5184 if (p2p->num_groups > 0) {
5185 /* Limit number of clients to avoid very long message */
5186 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
5187 p2p_group_buf_add_id(p2p->groups[0], buf);
5188 } else if (client_freq > 0 &&
5189 go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
5190 ssid && ssid_len > 0) {
5191 /*
5192 * Add the optional P2P Group ID to indicate in which group this
5193 * device is a P2P Client.
5194 */
5195 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
5196 }
5197
5198 return buf;
5199 }
5200
5201
p2p_build_nfc_handover_req(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5202 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
5203 int client_freq,
5204 const u8 *go_dev_addr,
5205 const u8 *ssid, size_t ssid_len)
5206 {
5207 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5208 ssid_len);
5209 }
5210
5211
p2p_build_nfc_handover_sel(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5212 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
5213 int client_freq,
5214 const u8 *go_dev_addr,
5215 const u8 *ssid, size_t ssid_len)
5216 {
5217 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5218 ssid_len);
5219 }
5220
5221
p2p_process_nfc_connection_handover(struct p2p_data * p2p,struct p2p_nfc_params * params)5222 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
5223 struct p2p_nfc_params *params)
5224 {
5225 struct p2p_message msg;
5226 struct p2p_device *dev;
5227 const u8 *p2p_dev_addr;
5228 int freq;
5229 enum p2p_role_indication role;
5230
5231 params->next_step = NO_ACTION;
5232
5233 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
5234 params->p2p_attr, params->p2p_len, &msg)) {
5235 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
5236 p2p_parse_free(&msg);
5237 return -1;
5238 }
5239
5240 if (msg.p2p_device_addr)
5241 p2p_dev_addr = msg.p2p_device_addr;
5242 else if (msg.device_id)
5243 p2p_dev_addr = msg.device_id;
5244 else {
5245 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
5246 p2p_parse_free(&msg);
5247 return -1;
5248 }
5249
5250 if (msg.oob_dev_password) {
5251 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
5252 msg.oob_dev_password_len);
5253 params->oob_dev_pw_len = msg.oob_dev_password_len;
5254 }
5255
5256 dev = p2p_create_device(p2p, p2p_dev_addr);
5257 if (dev == NULL) {
5258 p2p_parse_free(&msg);
5259 return -1;
5260 }
5261
5262 params->peer = &dev->info;
5263
5264 os_get_reltime(&dev->last_seen);
5265 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
5266 p2p_copy_wps_info(p2p, dev, 0, &msg);
5267
5268 if (!msg.oob_go_neg_channel) {
5269 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
5270 p2p_parse_free(&msg);
5271 return -1;
5272 }
5273
5274 if (msg.oob_go_neg_channel[3] == 0 &&
5275 msg.oob_go_neg_channel[4] == 0)
5276 freq = 0;
5277 else
5278 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
5279 msg.oob_go_neg_channel[4]);
5280 if (freq < 0) {
5281 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
5282 p2p_parse_free(&msg);
5283 return -1;
5284 }
5285 role = msg.oob_go_neg_channel[5];
5286
5287 if (role == P2P_GO_IN_A_GROUP) {
5288 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
5289 params->go_freq = freq;
5290 } else if (role == P2P_CLIENT_IN_A_GROUP) {
5291 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
5292 freq);
5293 params->go_freq = freq;
5294 } else
5295 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
5296 dev->oob_go_neg_freq = freq;
5297
5298 if (!params->sel && role != P2P_GO_IN_A_GROUP) {
5299 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
5300 p2p->cfg->channel);
5301 if (freq < 0) {
5302 p2p_dbg(p2p, "Own listen channel not known");
5303 p2p_parse_free(&msg);
5304 return -1;
5305 }
5306 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
5307 dev->oob_go_neg_freq = freq;
5308 }
5309
5310 if (msg.group_id) {
5311 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
5312 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
5313 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
5314 params->go_ssid_len);
5315 }
5316
5317 if (dev->flags & P2P_DEV_USER_REJECTED) {
5318 p2p_dbg(p2p, "Do not report rejected device");
5319 p2p_parse_free(&msg);
5320 return 0;
5321 }
5322
5323 if (!(dev->flags & P2P_DEV_REPORTED)) {
5324 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
5325 !(dev->flags & P2P_DEV_REPORTED_ONCE));
5326 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
5327 }
5328 p2p_parse_free(&msg);
5329
5330 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
5331 params->next_step = BOTH_GO;
5332 else if (role == P2P_GO_IN_A_GROUP)
5333 params->next_step = JOIN_GROUP;
5334 else if (role == P2P_CLIENT_IN_A_GROUP) {
5335 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
5336 params->next_step = PEER_CLIENT;
5337 } else if (p2p->num_groups > 0)
5338 params->next_step = AUTH_JOIN;
5339 else if (params->sel)
5340 params->next_step = INIT_GO_NEG;
5341 else
5342 params->next_step = RESP_GO_NEG;
5343
5344 return 0;
5345 }
5346
5347
p2p_set_authorized_oob_dev_pw_id(struct p2p_data * p2p,u16 dev_pw_id,int go_intent,const u8 * own_interface_addr)5348 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
5349 int go_intent,
5350 const u8 *own_interface_addr)
5351 {
5352
5353 p2p->authorized_oob_dev_pw_id = dev_pw_id;
5354 if (dev_pw_id == 0) {
5355 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
5356 return;
5357 }
5358
5359 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
5360 dev_pw_id);
5361
5362 p2p->go_intent = go_intent;
5363 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
5364 }
5365
5366 #endif /* CONFIG_WPS_NFC */
5367
5368
p2p_set_passphrase_len(struct p2p_data * p2p,unsigned int len)5369 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
5370 {
5371 if (len < 8 || len > 63)
5372 return -1;
5373 p2p->cfg->passphrase_len = len;
5374 return 0;
5375 }
5376
5377
p2p_set_vendor_elems(struct p2p_data * p2p,struct wpabuf ** vendor_elem)5378 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
5379 {
5380 p2p->vendor_elem = vendor_elem;
5381 }
5382
5383
p2p_go_neg_wait_timeout(void * eloop_ctx,void * timeout_ctx)5384 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
5385 {
5386 struct p2p_data *p2p = eloop_ctx;
5387
5388 p2p_dbg(p2p,
5389 "Timeout on waiting peer to become ready for GO Negotiation");
5390 p2p_go_neg_failed(p2p, -1);
5391 }
5392