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P2P: Inform upper layer when WFD-IE field of a P2P device has changed
[thirdparty/hostap.git] / src / p2p / p2p.c
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 "wps/wps_i.h"
17 #include "p2p_i.h"
18 #include "p2p.h"
19
20
21 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
22 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
23 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
24 const u8 *sa, const u8 *data, size_t len,
25 int rx_freq);
26 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
27 const u8 *sa, const u8 *data,
28 size_t len);
29 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
30 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
31
32
33 /*
34 * p2p_scan recovery timeout
35 *
36 * Many drivers are using 30 second timeout on scan results. Allow a bit larger
37 * timeout for this to avoid hitting P2P timeout unnecessarily.
38 */
39 #define P2P_SCAN_TIMEOUT 35
40
41 /**
42 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
43 * entries will be removed
44 */
45 #ifndef P2P_PEER_EXPIRATION_AGE
46 #define P2P_PEER_EXPIRATION_AGE 60
47 #endif /* P2P_PEER_EXPIRATION_AGE */
48
49 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
50
51 static void p2p_expire_peers(struct p2p_data *p2p)
52 {
53 struct p2p_device *dev, *n;
54 struct os_reltime now;
55 size_t i;
56
57 os_get_reltime(&now);
58 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
59 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
60 continue;
61
62 if (dev == p2p->go_neg_peer) {
63 /*
64 * GO Negotiation is in progress with the peer, so
65 * don't expire the peer entry until GO Negotiation
66 * fails or times out.
67 */
68 continue;
69 }
70
71 if (p2p->cfg->go_connected &&
72 p2p->cfg->go_connected(p2p->cfg->cb_ctx,
73 dev->info.p2p_device_addr)) {
74 /*
75 * We are connected as a client to a group in which the
76 * peer is the GO, so do not expire the peer entry.
77 */
78 os_get_reltime(&dev->last_seen);
79 continue;
80 }
81
82 for (i = 0; i < p2p->num_groups; i++) {
83 if (p2p_group_is_client_connected(
84 p2p->groups[i], dev->info.p2p_device_addr))
85 break;
86 }
87 if (i < p2p->num_groups) {
88 /*
89 * The peer is connected as a client in a group where
90 * we are the GO, so do not expire the peer entry.
91 */
92 os_get_reltime(&dev->last_seen);
93 continue;
94 }
95
96 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
97 MAC2STR(dev->info.p2p_device_addr));
98 dl_list_del(&dev->list);
99 p2p_device_free(p2p, dev);
100 }
101 }
102
103
104 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
105 {
106 struct p2p_data *p2p = eloop_ctx;
107 p2p_expire_peers(p2p);
108 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
109 p2p_expiration_timeout, p2p, NULL);
110 }
111
112
113 static const char * p2p_state_txt(int state)
114 {
115 switch (state) {
116 case P2P_IDLE:
117 return "IDLE";
118 case P2P_SEARCH:
119 return "SEARCH";
120 case P2P_CONNECT:
121 return "CONNECT";
122 case P2P_CONNECT_LISTEN:
123 return "CONNECT_LISTEN";
124 case P2P_GO_NEG:
125 return "GO_NEG";
126 case P2P_LISTEN_ONLY:
127 return "LISTEN_ONLY";
128 case P2P_WAIT_PEER_CONNECT:
129 return "WAIT_PEER_CONNECT";
130 case P2P_WAIT_PEER_IDLE:
131 return "WAIT_PEER_IDLE";
132 case P2P_SD_DURING_FIND:
133 return "SD_DURING_FIND";
134 case P2P_PROVISIONING:
135 return "PROVISIONING";
136 case P2P_PD_DURING_FIND:
137 return "PD_DURING_FIND";
138 case P2P_INVITE:
139 return "INVITE";
140 case P2P_INVITE_LISTEN:
141 return "INVITE_LISTEN";
142 default:
143 return "?";
144 }
145 }
146
147
148 const char * p2p_get_state_txt(struct p2p_data *p2p)
149 {
150 return p2p_state_txt(p2p->state);
151 }
152
153
154 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
155 {
156 struct p2p_device *dev = NULL;
157
158 if (!addr || !p2p)
159 return 0;
160
161 dev = p2p_get_device(p2p, addr);
162 if (dev)
163 return dev->wps_prov_info;
164 else
165 return 0;
166 }
167
168
169 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
170 {
171 struct p2p_device *dev = NULL;
172
173 if (!addr || !p2p)
174 return;
175
176 dev = p2p_get_device(p2p, addr);
177 if (dev)
178 dev->wps_prov_info = 0;
179 }
180
181
182 void p2p_set_state(struct p2p_data *p2p, int new_state)
183 {
184 p2p_dbg(p2p, "State %s -> %s",
185 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
186 p2p->state = new_state;
187
188 if (new_state == P2P_IDLE && p2p->pending_channel) {
189 p2p_dbg(p2p, "Apply change in listen channel");
190 p2p->cfg->reg_class = p2p->pending_reg_class;
191 p2p->cfg->channel = p2p->pending_channel;
192 p2p->pending_reg_class = 0;
193 p2p->pending_channel = 0;
194 }
195 }
196
197
198 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
199 {
200 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
201 p2p_state_txt(p2p->state), sec, usec);
202 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
203 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
204 }
205
206
207 void p2p_clear_timeout(struct p2p_data *p2p)
208 {
209 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
210 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
211 }
212
213
214 void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer,
215 int status)
216 {
217 struct p2p_go_neg_results res;
218 p2p_clear_timeout(p2p);
219 p2p_set_state(p2p, P2P_IDLE);
220 if (p2p->go_neg_peer) {
221 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
222 p2p->go_neg_peer->wps_method = WPS_NOT_READY;
223 p2p->go_neg_peer->oob_pw_id = 0;
224 }
225 p2p->go_neg_peer = NULL;
226
227 os_memset(&res, 0, sizeof(res));
228 res.status = status;
229 if (peer) {
230 wpabuf_free(peer->go_neg_conf);
231 peer->go_neg_conf = NULL;
232 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr,
233 ETH_ALEN);
234 os_memcpy(res.peer_interface_addr, peer->intended_addr,
235 ETH_ALEN);
236 }
237 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
238 }
239
240
241 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
242 {
243 unsigned int r, tu;
244 int freq;
245 struct wpabuf *ies;
246
247 p2p_dbg(p2p, "Starting short listen state (state=%s)",
248 p2p_state_txt(p2p->state));
249
250 if (p2p->pending_listen_freq) {
251 /* We have a pending p2p_listen request */
252 p2p_dbg(p2p, "p2p_listen command pending already");
253 return;
254 }
255
256 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
257 if (freq < 0) {
258 p2p_dbg(p2p, "Unknown regulatory class/channel");
259 return;
260 }
261
262 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
263 r = 0;
264 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
265 p2p->min_disc_int) * 100;
266 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
267 tu = p2p->max_disc_tu;
268 if (!dev_disc && tu < 100)
269 tu = 100; /* Need to wait in non-device discovery use cases */
270 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
271 tu = p2p->cfg->max_listen * 1000 / 1024;
272
273 if (tu == 0) {
274 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
275 p2p_set_timeout(p2p, 0, 0);
276 return;
277 }
278
279 ies = p2p_build_probe_resp_ies(p2p);
280 if (ies == NULL)
281 return;
282
283 p2p->pending_listen_freq = freq;
284 p2p->pending_listen_sec = 0;
285 p2p->pending_listen_usec = 1024 * tu;
286
287 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
288 ies) < 0) {
289 p2p_dbg(p2p, "Failed to start listen mode");
290 p2p->pending_listen_freq = 0;
291 }
292 wpabuf_free(ies);
293 }
294
295
296 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
297 {
298 int freq;
299 struct wpabuf *ies;
300
301 p2p_dbg(p2p, "Going to listen(only) state");
302
303 if (p2p->pending_listen_freq) {
304 /* We have a pending p2p_listen request */
305 p2p_dbg(p2p, "p2p_listen command pending already");
306 return -1;
307 }
308
309 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
310 if (freq < 0) {
311 p2p_dbg(p2p, "Unknown regulatory class/channel");
312 return -1;
313 }
314
315 p2p->pending_listen_sec = timeout / 1000;
316 p2p->pending_listen_usec = (timeout % 1000) * 1000;
317
318 if (p2p->p2p_scan_running) {
319 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
320 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
321 return 0;
322 }
323 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
324 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
325 return 0;
326 }
327
328 ies = p2p_build_probe_resp_ies(p2p);
329 if (ies == NULL)
330 return -1;
331
332 p2p->pending_listen_freq = freq;
333
334 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
335 p2p_dbg(p2p, "Failed to start listen mode");
336 p2p->pending_listen_freq = 0;
337 wpabuf_free(ies);
338 return -1;
339 }
340 wpabuf_free(ies);
341
342 p2p_set_state(p2p, P2P_LISTEN_ONLY);
343
344 return 0;
345 }
346
347
348 static void p2p_device_clear_reported(struct p2p_data *p2p)
349 {
350 struct p2p_device *dev;
351 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list)
352 dev->flags &= ~P2P_DEV_REPORTED;
353 }
354
355
356 /**
357 * p2p_get_device - Fetch a peer entry
358 * @p2p: P2P module context from p2p_init()
359 * @addr: P2P Device Address of the peer
360 * Returns: Pointer to the device entry or %NULL if not found
361 */
362 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
363 {
364 struct p2p_device *dev;
365 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
366 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
367 return dev;
368 }
369 return NULL;
370 }
371
372
373 /**
374 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
375 * @p2p: P2P module context from p2p_init()
376 * @addr: P2P Interface Address of the peer
377 * Returns: Pointer to the device entry or %NULL if not found
378 */
379 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
380 const u8 *addr)
381 {
382 struct p2p_device *dev;
383 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
384 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
385 return dev;
386 }
387 return NULL;
388 }
389
390
391 /**
392 * p2p_create_device - Create a peer entry
393 * @p2p: P2P module context from p2p_init()
394 * @addr: P2P Device Address of the peer
395 * Returns: Pointer to the device entry or %NULL on failure
396 *
397 * If there is already an entry for the peer, it will be returned instead of
398 * creating a new one.
399 */
400 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
401 const u8 *addr)
402 {
403 struct p2p_device *dev, *oldest = NULL;
404 size_t count = 0;
405
406 dev = p2p_get_device(p2p, addr);
407 if (dev)
408 return dev;
409
410 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
411 count++;
412 if (oldest == NULL ||
413 os_reltime_before(&dev->last_seen, &oldest->last_seen))
414 oldest = dev;
415 }
416 if (count + 1 > p2p->cfg->max_peers && oldest) {
417 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
418 dl_list_del(&oldest->list);
419 p2p_device_free(p2p, oldest);
420 }
421
422 dev = os_zalloc(sizeof(*dev));
423 if (dev == NULL)
424 return NULL;
425 dl_list_add(&p2p->devices, &dev->list);
426 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
427
428 return dev;
429 }
430
431
432 static void p2p_copy_client_info(struct p2p_device *dev,
433 struct p2p_client_info *cli)
434 {
435 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
436 dev->info.device_name[cli->dev_name_len] = '\0';
437 dev->info.dev_capab = cli->dev_capab;
438 dev->info.config_methods = cli->config_methods;
439 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
440 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
441 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
442 dev->info.wps_sec_dev_type_list_len);
443 }
444
445
446 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
447 const u8 *go_interface_addr, int freq,
448 const u8 *gi, size_t gi_len)
449 {
450 struct p2p_group_info info;
451 size_t c;
452 struct p2p_device *dev;
453
454 if (gi == NULL)
455 return 0;
456
457 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
458 return -1;
459
460 /*
461 * Clear old data for this group; if the devices are still in the
462 * group, the information will be restored in the loop following this.
463 */
464 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
465 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
466 ETH_ALEN) == 0) {
467 os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
468 os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
469 }
470 }
471
472 for (c = 0; c < info.num_clients; c++) {
473 struct p2p_client_info *cli = &info.client[c];
474 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
475 ETH_ALEN) == 0)
476 continue; /* ignore our own entry */
477 dev = p2p_get_device(p2p, cli->p2p_device_addr);
478 if (dev) {
479 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
480 P2P_DEV_PROBE_REQ_ONLY)) {
481 /*
482 * Update information since we have not
483 * received this directly from the client.
484 */
485 p2p_copy_client_info(dev, cli);
486 } else {
487 /*
488 * Need to update P2P Client Discoverability
489 * flag since it is valid only in P2P Group
490 * Info attribute.
491 */
492 dev->info.dev_capab &=
493 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
494 dev->info.dev_capab |=
495 cli->dev_capab &
496 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
497 }
498 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
499 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
500 }
501 } else {
502 dev = p2p_create_device(p2p, cli->p2p_device_addr);
503 if (dev == NULL)
504 continue;
505 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
506 p2p_copy_client_info(dev, cli);
507 dev->oper_freq = freq;
508 p2p->cfg->dev_found(p2p->cfg->cb_ctx,
509 dev->info.p2p_device_addr,
510 &dev->info, 1);
511 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
512 }
513
514 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
515 ETH_ALEN);
516 os_get_reltime(&dev->last_seen);
517 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
518 os_memcpy(dev->member_in_go_iface, go_interface_addr,
519 ETH_ALEN);
520 }
521
522 return 0;
523 }
524
525
526 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
527 int probe_req, const struct p2p_message *msg)
528 {
529 os_memcpy(dev->info.device_name, msg->device_name,
530 sizeof(dev->info.device_name));
531
532 if (msg->manufacturer &&
533 msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
534 os_memset(dev->info.manufacturer, 0,
535 sizeof(dev->info.manufacturer));
536 os_memcpy(dev->info.manufacturer, msg->manufacturer,
537 msg->manufacturer_len);
538 }
539
540 if (msg->model_name &&
541 msg->model_name_len < sizeof(dev->info.model_name)) {
542 os_memset(dev->info.model_name, 0,
543 sizeof(dev->info.model_name));
544 os_memcpy(dev->info.model_name, msg->model_name,
545 msg->model_name_len);
546 }
547
548 if (msg->model_number &&
549 msg->model_number_len < sizeof(dev->info.model_number)) {
550 os_memset(dev->info.model_number, 0,
551 sizeof(dev->info.model_number));
552 os_memcpy(dev->info.model_number, msg->model_number,
553 msg->model_number_len);
554 }
555
556 if (msg->serial_number &&
557 msg->serial_number_len < sizeof(dev->info.serial_number)) {
558 os_memset(dev->info.serial_number, 0,
559 sizeof(dev->info.serial_number));
560 os_memcpy(dev->info.serial_number, msg->serial_number,
561 msg->serial_number_len);
562 }
563
564 if (msg->pri_dev_type)
565 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
566 sizeof(dev->info.pri_dev_type));
567 else if (msg->wps_pri_dev_type)
568 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
569 sizeof(dev->info.pri_dev_type));
570
571 if (msg->wps_sec_dev_type_list) {
572 os_memcpy(dev->info.wps_sec_dev_type_list,
573 msg->wps_sec_dev_type_list,
574 msg->wps_sec_dev_type_list_len);
575 dev->info.wps_sec_dev_type_list_len =
576 msg->wps_sec_dev_type_list_len;
577 }
578
579 if (msg->capability) {
580 /*
581 * P2P Client Discoverability bit is reserved in all frames
582 * that use this function, so do not change its value here.
583 */
584 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
585 dev->info.dev_capab |= msg->capability[0] &
586 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
587 dev->info.group_capab = msg->capability[1];
588 }
589
590 if (msg->ext_listen_timing) {
591 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
592 dev->ext_listen_interval =
593 WPA_GET_LE16(msg->ext_listen_timing + 2);
594 }
595
596 if (!probe_req) {
597 u16 new_config_methods;
598 new_config_methods = msg->config_methods ?
599 msg->config_methods : msg->wps_config_methods;
600 if (new_config_methods &&
601 dev->info.config_methods != new_config_methods) {
602 p2p_dbg(p2p, "Update peer " MACSTR
603 " config_methods 0x%x -> 0x%x",
604 MAC2STR(dev->info.p2p_device_addr),
605 dev->info.config_methods,
606 new_config_methods);
607 dev->info.config_methods = new_config_methods;
608 }
609 }
610 }
611
612
613 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
614 size_t ies_len)
615 {
616 const u8 *pos, *end;
617 u8 id, len;
618
619 wpabuf_free(dev->info.vendor_elems);
620 dev->info.vendor_elems = NULL;
621
622 end = ies + ies_len;
623
624 for (pos = ies; pos + 1 < end; pos += len) {
625 id = *pos++;
626 len = *pos++;
627
628 if (pos + len > end)
629 break;
630
631 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
632 continue;
633
634 if (len >= 4) {
635 u32 type = WPA_GET_BE32(pos);
636
637 if (type == WPA_IE_VENDOR_TYPE ||
638 type == WMM_IE_VENDOR_TYPE ||
639 type == WPS_IE_VENDOR_TYPE ||
640 type == P2P_IE_VENDOR_TYPE ||
641 type == WFD_IE_VENDOR_TYPE)
642 continue;
643 }
644
645 /* Unknown vendor element - make raw IE data available */
646 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
647 break;
648 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
649 }
650 }
651
652
653 static int p2p_compare_wfd_info(struct p2p_device *dev,
654 const struct p2p_message *msg)
655 {
656 if (dev->info.wfd_subelems && msg->wfd_subelems) {
657 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
658 return 1;
659
660 return os_memcmp(dev->info.wfd_subelems->buf,
661 msg->wfd_subelems->buf,
662 dev->info.wfd_subelems->used);
663 }
664 if (dev->info.wfd_subelems || msg->wfd_subelems)
665 return 1;
666
667 return 0;
668 }
669
670
671 /**
672 * p2p_add_device - Add peer entries based on scan results or P2P frames
673 * @p2p: P2P module context from p2p_init()
674 * @addr: Source address of Beacon or Probe Response frame (may be either
675 * P2P Device Address or P2P Interface Address)
676 * @level: Signal level (signal strength of the received frame from the peer)
677 * @freq: Frequency on which the Beacon or Probe Response frame was received
678 * @rx_time: Time when the result was received
679 * @ies: IEs from the Beacon or Probe Response frame
680 * @ies_len: Length of ies buffer in octets
681 * @scan_res: Whether this was based on scan results
682 * Returns: 0 on success, -1 on failure
683 *
684 * If the scan result is for a GO, the clients in the group will also be added
685 * to the peer table. This function can also be used with some other frames
686 * like Provision Discovery Request that contains P2P Capability and P2P Device
687 * Info attributes.
688 */
689 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
690 struct os_reltime *rx_time, int level, const u8 *ies,
691 size_t ies_len, int scan_res)
692 {
693 struct p2p_device *dev;
694 struct p2p_message msg;
695 const u8 *p2p_dev_addr;
696 int wfd_changed;
697 int i;
698 struct os_reltime time_now;
699
700 os_memset(&msg, 0, sizeof(msg));
701 if (p2p_parse_ies(ies, ies_len, &msg)) {
702 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
703 p2p_parse_free(&msg);
704 return -1;
705 }
706
707 if (msg.p2p_device_addr)
708 p2p_dev_addr = msg.p2p_device_addr;
709 else if (msg.device_id)
710 p2p_dev_addr = msg.device_id;
711 else {
712 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
713 p2p_parse_free(&msg);
714 return -1;
715 }
716
717 if (!is_zero_ether_addr(p2p->peer_filter) &&
718 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
719 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
720 " due to peer filter", MAC2STR(p2p_dev_addr));
721 p2p_parse_free(&msg);
722 return 0;
723 }
724
725 dev = p2p_create_device(p2p, p2p_dev_addr);
726 if (dev == NULL) {
727 p2p_parse_free(&msg);
728 return -1;
729 }
730
731 if (rx_time == NULL) {
732 os_get_reltime(&time_now);
733 rx_time = &time_now;
734 }
735
736 /*
737 * Update the device entry only if the new peer
738 * entry is newer than the one previously stored.
739 */
740 if (dev->last_seen.sec > 0 &&
741 os_reltime_before(rx_time, &dev->last_seen)) {
742 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
743 (unsigned int) rx_time->sec,
744 (unsigned int) rx_time->usec,
745 (unsigned int) dev->last_seen.sec,
746 (unsigned int) dev->last_seen.usec);
747 p2p_parse_free(&msg);
748 return -1;
749 }
750
751 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
752
753 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
754
755 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
756 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
757 if (msg.ssid &&
758 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
759 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
760 != 0)) {
761 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
762 dev->oper_ssid_len = msg.ssid[1];
763 }
764
765 if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
766 *msg.ds_params >= 1 && *msg.ds_params <= 14) {
767 int ds_freq;
768 if (*msg.ds_params == 14)
769 ds_freq = 2484;
770 else
771 ds_freq = 2407 + *msg.ds_params * 5;
772 if (freq != ds_freq) {
773 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
774 freq, ds_freq);
775 freq = ds_freq;
776 }
777 }
778
779 if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
780 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
781 MACSTR " %d -> %d MHz (DS param %d)",
782 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
783 freq, msg.ds_params ? *msg.ds_params : -1);
784 }
785 if (scan_res) {
786 dev->listen_freq = freq;
787 if (msg.group_info)
788 dev->oper_freq = freq;
789 }
790 dev->info.level = level;
791
792 p2p_copy_wps_info(p2p, dev, 0, &msg);
793
794 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
795 wpabuf_free(dev->info.wps_vendor_ext[i]);
796 dev->info.wps_vendor_ext[i] = NULL;
797 }
798
799 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
800 if (msg.wps_vendor_ext[i] == NULL)
801 break;
802 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
803 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
804 if (dev->info.wps_vendor_ext[i] == NULL)
805 break;
806 }
807
808 wfd_changed = p2p_compare_wfd_info(dev, &msg);
809
810 if (msg.wfd_subelems) {
811 wpabuf_free(dev->info.wfd_subelems);
812 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
813 }
814
815 if (scan_res) {
816 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
817 msg.group_info, msg.group_info_len);
818 }
819
820 p2p_parse_free(&msg);
821
822 p2p_update_peer_vendor_elems(dev, ies, ies_len);
823
824 if (dev->flags & P2P_DEV_REPORTED && !wfd_changed)
825 return 0;
826
827 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
828 freq, (unsigned int) rx_time->sec,
829 (unsigned int) rx_time->usec);
830 if (dev->flags & P2P_DEV_USER_REJECTED) {
831 p2p_dbg(p2p, "Do not report rejected device");
832 return 0;
833 }
834
835 if (dev->info.config_methods == 0 &&
836 (freq == 2412 || freq == 2437 || freq == 2462)) {
837 /*
838 * If we have only seen a Beacon frame from a GO, we do not yet
839 * know what WPS config methods it supports. Since some
840 * applications use config_methods value from P2P-DEVICE-FOUND
841 * events, postpone reporting this peer until we've fully
842 * discovered its capabilities.
843 *
844 * At least for now, do this only if the peer was detected on
845 * one of the social channels since that peer can be easily be
846 * found again and there are no limitations of having to use
847 * passive scan on this channels, so this can be done through
848 * Probe Response frame that includes the config_methods
849 * information.
850 */
851 p2p_dbg(p2p, "Do not report peer " MACSTR
852 " with unknown config methods", MAC2STR(addr));
853 return 0;
854 }
855
856 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
857 !(dev->flags & P2P_DEV_REPORTED_ONCE));
858 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
859
860 return 0;
861 }
862
863
864 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
865 {
866 int i;
867
868 if (p2p->go_neg_peer == dev) {
869 /*
870 * If GO Negotiation is in progress, report that it has failed.
871 */
872 p2p_go_neg_failed(p2p, dev, -1);
873 p2p->go_neg_peer = NULL;
874 }
875 if (p2p->invite_peer == dev)
876 p2p->invite_peer = NULL;
877 if (p2p->sd_peer == dev)
878 p2p->sd_peer = NULL;
879 if (p2p->pending_client_disc_go == dev)
880 p2p->pending_client_disc_go = NULL;
881
882 /* dev_lost() device, but only if it was previously dev_found() */
883 if (dev->flags & P2P_DEV_REPORTED_ONCE)
884 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
885 dev->info.p2p_device_addr);
886
887 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
888 wpabuf_free(dev->info.wps_vendor_ext[i]);
889 dev->info.wps_vendor_ext[i] = NULL;
890 }
891
892 wpabuf_free(dev->info.wfd_subelems);
893 wpabuf_free(dev->info.vendor_elems);
894 wpabuf_free(dev->go_neg_conf);
895
896 os_free(dev);
897 }
898
899
900 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
901 {
902 struct p2p_channels *c;
903 struct p2p_reg_class *cla;
904 size_t cl, ch;
905 int found = 0;
906 u8 reg_class;
907 u8 channel;
908 int freq;
909
910 c = &p2p->cfg->channels;
911 for (cl = 0; cl < c->reg_classes; cl++) {
912 cla = &c->reg_class[cl];
913 if (cla->reg_class != p2p->last_prog_scan_class)
914 continue;
915 for (ch = 0; ch < cla->channels; ch++) {
916 if (cla->channel[ch] == p2p->last_prog_scan_chan) {
917 found = 1;
918 break;
919 }
920 }
921 if (found)
922 break;
923 }
924
925 if (!found) {
926 /* Start from beginning */
927 reg_class = c->reg_class[0].reg_class;
928 channel = c->reg_class[0].channel[0];
929 } else {
930 /* Pick the next channel */
931 ch++;
932 if (ch == cla->channels) {
933 cl++;
934 if (cl == c->reg_classes)
935 cl = 0;
936 ch = 0;
937 }
938 reg_class = c->reg_class[cl].reg_class;
939 channel = c->reg_class[cl].channel[ch];
940 }
941
942 freq = p2p_channel_to_freq(reg_class, channel);
943 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
944 reg_class, channel, freq);
945 p2p->last_prog_scan_class = reg_class;
946 p2p->last_prog_scan_chan = channel;
947
948 if (freq == 2412 || freq == 2437 || freq == 2462)
949 return 0; /* No need to add social channels */
950 return freq;
951 }
952
953
954 static void p2p_search(struct p2p_data *p2p)
955 {
956 int freq = 0;
957 enum p2p_scan_type type;
958 u16 pw_id = DEV_PW_DEFAULT;
959 int res;
960
961 if (p2p->drv_in_listen) {
962 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
963 return;
964 }
965 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
966
967 if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
968 (freq = p2p_get_next_prog_freq(p2p)) > 0) {
969 type = P2P_SCAN_SOCIAL_PLUS_ONE;
970 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
971 } else {
972 type = P2P_SCAN_SOCIAL;
973 p2p_dbg(p2p, "Starting search");
974 }
975
976 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
977 p2p->num_req_dev_types, p2p->req_dev_types,
978 p2p->find_dev_id, pw_id);
979 if (res < 0) {
980 p2p_dbg(p2p, "Scan request failed");
981 p2p_continue_find(p2p);
982 } else {
983 p2p_dbg(p2p, "Running p2p_scan");
984 p2p->p2p_scan_running = 1;
985 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
986 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
987 p2p, NULL);
988 }
989 }
990
991
992 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
993 {
994 struct p2p_data *p2p = eloop_ctx;
995 p2p_dbg(p2p, "Find timeout -> stop");
996 p2p_stop_find(p2p);
997 }
998
999
1000 static int p2p_run_after_scan(struct p2p_data *p2p)
1001 {
1002 struct p2p_device *dev;
1003 enum p2p_after_scan op;
1004
1005 if (p2p->after_scan_tx) {
1006 p2p->after_scan_tx_in_progress = 1;
1007 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1008 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1009 p2p->after_scan_tx->freq,
1010 p2p->after_scan_tx->dst,
1011 p2p->after_scan_tx->src,
1012 p2p->after_scan_tx->bssid,
1013 (u8 *) (p2p->after_scan_tx + 1),
1014 p2p->after_scan_tx->len,
1015 p2p->after_scan_tx->wait_time);
1016 os_free(p2p->after_scan_tx);
1017 p2p->after_scan_tx = NULL;
1018 return 1;
1019 }
1020
1021 op = p2p->start_after_scan;
1022 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1023 switch (op) {
1024 case P2P_AFTER_SCAN_NOTHING:
1025 break;
1026 case P2P_AFTER_SCAN_LISTEN:
1027 p2p_dbg(p2p, "Start previously requested Listen state");
1028 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1029 p2p->pending_listen_usec / 1000);
1030 return 1;
1031 case P2P_AFTER_SCAN_CONNECT:
1032 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1033 MAC2STR(p2p->after_scan_peer));
1034 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1035 if (dev == NULL) {
1036 p2p_dbg(p2p, "Peer not known anymore");
1037 break;
1038 }
1039 p2p_connect_send(p2p, dev);
1040 return 1;
1041 }
1042
1043 return 0;
1044 }
1045
1046
1047 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1048 {
1049 struct p2p_data *p2p = eloop_ctx;
1050 int running;
1051 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1052 running = p2p->p2p_scan_running;
1053 /* Make sure we recover from missed scan results callback */
1054 p2p->p2p_scan_running = 0;
1055
1056 if (running)
1057 p2p_run_after_scan(p2p);
1058 }
1059
1060
1061 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1062 {
1063 p2p->num_req_dev_types = 0;
1064 os_free(p2p->req_dev_types);
1065 p2p->req_dev_types = NULL;
1066 }
1067
1068
1069 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1070 enum p2p_discovery_type type,
1071 unsigned int num_req_dev_types, const u8 *req_dev_types,
1072 const u8 *dev_id, unsigned int search_delay)
1073 {
1074 int res;
1075
1076 p2p_dbg(p2p, "Starting find (type=%d)", type);
1077 os_get_reltime(&p2p->find_start);
1078 if (p2p->p2p_scan_running) {
1079 p2p_dbg(p2p, "p2p_scan is already running");
1080 }
1081
1082 p2p_free_req_dev_types(p2p);
1083 if (req_dev_types && num_req_dev_types) {
1084 p2p->req_dev_types = os_malloc(num_req_dev_types *
1085 WPS_DEV_TYPE_LEN);
1086 if (p2p->req_dev_types == NULL)
1087 return -1;
1088 os_memcpy(p2p->req_dev_types, req_dev_types,
1089 num_req_dev_types * WPS_DEV_TYPE_LEN);
1090 p2p->num_req_dev_types = num_req_dev_types;
1091 }
1092
1093 if (dev_id) {
1094 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1095 p2p->find_dev_id = p2p->find_dev_id_buf;
1096 } else
1097 p2p->find_dev_id = NULL;
1098
1099 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1100 p2p_clear_timeout(p2p);
1101 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1102 p2p->find_type = type;
1103 p2p_device_clear_reported(p2p);
1104 p2p_set_state(p2p, P2P_SEARCH);
1105 p2p->search_delay = search_delay;
1106 p2p->in_search_delay = 0;
1107 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1108 p2p->last_p2p_find_timeout = timeout;
1109 if (timeout)
1110 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1111 p2p, NULL);
1112 switch (type) {
1113 case P2P_FIND_START_WITH_FULL:
1114 case P2P_FIND_PROGRESSIVE:
1115 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1116 p2p->num_req_dev_types,
1117 p2p->req_dev_types, dev_id,
1118 DEV_PW_DEFAULT);
1119 break;
1120 case P2P_FIND_ONLY_SOCIAL:
1121 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1122 p2p->num_req_dev_types,
1123 p2p->req_dev_types, dev_id,
1124 DEV_PW_DEFAULT);
1125 break;
1126 default:
1127 return -1;
1128 }
1129
1130 if (res == 0) {
1131 p2p_dbg(p2p, "Running p2p_scan");
1132 p2p->p2p_scan_running = 1;
1133 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1134 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1135 p2p, NULL);
1136 } else if (p2p->p2p_scan_running) {
1137 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1138 /* wait for the previous p2p_scan to complete */
1139 res = 0; /* do not report failure */
1140 } else {
1141 p2p_dbg(p2p, "Failed to start p2p_scan");
1142 p2p_set_state(p2p, P2P_IDLE);
1143 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1144 }
1145
1146 return res;
1147 }
1148
1149
1150 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1151 {
1152 p2p_dbg(p2p, "Stopping find");
1153 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1154 p2p_clear_timeout(p2p);
1155 if (p2p->state == P2P_SEARCH)
1156 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1157 p2p_set_state(p2p, P2P_IDLE);
1158 p2p_free_req_dev_types(p2p);
1159 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1160 if (p2p->go_neg_peer)
1161 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1162 p2p->go_neg_peer = NULL;
1163 p2p->sd_peer = NULL;
1164 p2p->invite_peer = NULL;
1165 p2p_stop_listen_for_freq(p2p, freq);
1166 }
1167
1168
1169 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1170 {
1171 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1172 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1173 return;
1174 }
1175 if (p2p->in_listen) {
1176 p2p->in_listen = 0;
1177 p2p_clear_timeout(p2p);
1178 }
1179 if (p2p->drv_in_listen) {
1180 /*
1181 * The driver may not deliver callback to p2p_listen_end()
1182 * when the operation gets canceled, so clear the internal
1183 * variable that is tracking driver state.
1184 */
1185 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1186 p2p->drv_in_listen = 0;
1187 }
1188 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1189 }
1190
1191
1192 void p2p_stop_listen(struct p2p_data *p2p)
1193 {
1194 if (p2p->state != P2P_LISTEN_ONLY) {
1195 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1196 return;
1197 }
1198
1199 p2p_stop_listen_for_freq(p2p, 0);
1200 p2p_set_state(p2p, P2P_IDLE);
1201 }
1202
1203
1204 void p2p_stop_find(struct p2p_data *p2p)
1205 {
1206 p2p->pending_listen_freq = 0;
1207 p2p_stop_find_for_freq(p2p, 0);
1208 }
1209
1210
1211 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1212 unsigned int force_freq,
1213 unsigned int pref_freq, int go)
1214 {
1215 u8 op_class, op_channel;
1216 unsigned int freq = force_freq ? force_freq : pref_freq;
1217
1218 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1219 force_freq, pref_freq, go);
1220 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1221 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1222 return -1;
1223 }
1224
1225 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1226 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1227 op_channel))) {
1228 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1229 freq, op_class, op_channel);
1230 return -1;
1231 }
1232
1233 p2p->op_reg_class = op_class;
1234 p2p->op_channel = op_channel;
1235
1236 if (force_freq) {
1237 p2p->channels.reg_classes = 1;
1238 p2p->channels.reg_class[0].channels = 1;
1239 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1240 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1241 } else {
1242 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1243 sizeof(struct p2p_channels));
1244 }
1245
1246 return 0;
1247 }
1248
1249
1250 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1251 {
1252 u8 op_class, op_channel;
1253 const int op_classes_5ghz[] = { 124, 115, 0 };
1254 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1255 const int op_classes_vht[] = { 128, 0 };
1256
1257 p2p_dbg(p2p, "Prepare channel best");
1258
1259 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1260 p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1261 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1262 == 0) {
1263 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1264 p2p->op_reg_class = op_class;
1265 p2p->op_channel = op_channel;
1266 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1267 p2p_supported_freq(p2p, p2p->best_freq_5) &&
1268 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1269 == 0) {
1270 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1271 p2p->op_reg_class = op_class;
1272 p2p->op_channel = op_channel;
1273 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1274 p2p_supported_freq(p2p, p2p->best_freq_24) &&
1275 p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1276 &op_channel) == 0) {
1277 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1278 p2p->op_reg_class = op_class;
1279 p2p->op_channel = op_channel;
1280 } else if (p2p->cfg->num_pref_chan > 0 &&
1281 p2p_channels_includes(&p2p->cfg->channels,
1282 p2p->cfg->pref_chan[0].op_class,
1283 p2p->cfg->pref_chan[0].chan)) {
1284 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1285 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1286 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1287 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1288 &p2p->op_reg_class, &p2p->op_channel) ==
1289 0) {
1290 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1291 p2p->op_reg_class, p2p->op_channel);
1292 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1293 &p2p->op_reg_class, &p2p->op_channel) ==
1294 0) {
1295 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1296 p2p->op_reg_class, p2p->op_channel);
1297 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1298 &p2p->op_reg_class, &p2p->op_channel) ==
1299 0) {
1300 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1301 p2p->op_reg_class, p2p->op_channel);
1302 } else if (p2p_channels_includes(&p2p->cfg->channels,
1303 p2p->cfg->op_reg_class,
1304 p2p->cfg->op_channel)) {
1305 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1306 p2p->op_reg_class = p2p->cfg->op_reg_class;
1307 p2p->op_channel = p2p->cfg->op_channel;
1308 } else if (p2p_channel_random_social(&p2p->cfg->channels,
1309 &p2p->op_reg_class,
1310 &p2p->op_channel) == 0) {
1311 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1312 p2p->op_reg_class, p2p->op_channel);
1313 } else {
1314 /* Select any random available channel from the first available
1315 * operating class */
1316 p2p_channel_select(&p2p->cfg->channels, NULL,
1317 &p2p->op_reg_class,
1318 &p2p->op_channel);
1319 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1320 p2p->op_channel, p2p->op_reg_class);
1321 }
1322
1323 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1324 sizeof(struct p2p_channels));
1325 }
1326
1327
1328 /**
1329 * p2p_prepare_channel - Select operating channel for GO Negotiation
1330 * @p2p: P2P module context from p2p_init()
1331 * @dev: Selected peer device
1332 * @force_freq: Forced frequency in MHz or 0 if not forced
1333 * @pref_freq: Preferred frequency in MHz or 0 if no preference
1334 * @go: Whether the local end will be forced to be GO
1335 * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1336 *
1337 * This function is used to do initial operating channel selection for GO
1338 * Negotiation prior to having received peer information. The selected channel
1339 * may be further optimized in p2p_reselect_channel() once the peer information
1340 * is available.
1341 */
1342 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1343 unsigned int force_freq, unsigned int pref_freq, int go)
1344 {
1345 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1346 force_freq, pref_freq, go);
1347 if (force_freq || pref_freq) {
1348 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1349 0)
1350 return -1;
1351 } else {
1352 p2p_prepare_channel_best(p2p);
1353 }
1354 p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1355 if (go)
1356 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1357 else if (!force_freq)
1358 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels,
1359 &p2p->channels);
1360 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1361
1362 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1363 p2p->op_reg_class, p2p->op_channel,
1364 force_freq ? " (forced)" : "");
1365
1366 if (force_freq)
1367 dev->flags |= P2P_DEV_FORCE_FREQ;
1368 else
1369 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1370
1371 return 0;
1372 }
1373
1374
1375 static void p2p_set_dev_persistent(struct p2p_device *dev,
1376 int persistent_group)
1377 {
1378 switch (persistent_group) {
1379 case 0:
1380 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1381 P2P_DEV_PREFER_PERSISTENT_RECONN);
1382 break;
1383 case 1:
1384 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1385 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1386 break;
1387 case 2:
1388 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1389 P2P_DEV_PREFER_PERSISTENT_RECONN;
1390 break;
1391 }
1392 }
1393
1394
1395 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1396 enum p2p_wps_method wps_method,
1397 int go_intent, const u8 *own_interface_addr,
1398 unsigned int force_freq, int persistent_group,
1399 const u8 *force_ssid, size_t force_ssid_len,
1400 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1401 {
1402 struct p2p_device *dev;
1403
1404 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1405 " GO Intent=%d Intended Interface Address=" MACSTR
1406 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1407 "oob_pw_id=%u",
1408 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1409 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1410
1411 dev = p2p_get_device(p2p, peer_addr);
1412 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1413 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1414 MAC2STR(peer_addr));
1415 return -1;
1416 }
1417
1418 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1419 go_intent == 15) < 0)
1420 return -1;
1421
1422 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1423 if (!(dev->info.dev_capab &
1424 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1425 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1426 " that is in a group and is not discoverable",
1427 MAC2STR(peer_addr));
1428 return -1;
1429 }
1430 if (dev->oper_freq <= 0) {
1431 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1432 " with incomplete information",
1433 MAC2STR(peer_addr));
1434 return -1;
1435 }
1436
1437 /*
1438 * First, try to connect directly. If the peer does not
1439 * acknowledge frames, assume it is sleeping and use device
1440 * discoverability via the GO at that point.
1441 */
1442 }
1443
1444 p2p->ssid_set = 0;
1445 if (force_ssid) {
1446 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1447 force_ssid, force_ssid_len);
1448 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1449 p2p->ssid_len = force_ssid_len;
1450 p2p->ssid_set = 1;
1451 }
1452
1453 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1454 dev->flags &= ~P2P_DEV_USER_REJECTED;
1455 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1456 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1457 if (pd_before_go_neg)
1458 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1459 else {
1460 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1461 /*
1462 * Assign dialog token and tie breaker here to use the same
1463 * values in each retry within the same GO Negotiation exchange.
1464 */
1465 dev->dialog_token++;
1466 if (dev->dialog_token == 0)
1467 dev->dialog_token = 1;
1468 dev->tie_breaker = p2p->next_tie_breaker;
1469 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1470 }
1471 dev->connect_reqs = 0;
1472 dev->go_neg_req_sent = 0;
1473 dev->go_state = UNKNOWN_GO;
1474 p2p_set_dev_persistent(dev, persistent_group);
1475 p2p->go_intent = go_intent;
1476 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1477
1478 if (p2p->state != P2P_IDLE)
1479 p2p_stop_find(p2p);
1480
1481 if (p2p->after_scan_tx) {
1482 /*
1483 * We need to drop the pending frame to avoid issues with the
1484 * new GO Negotiation, e.g., when the pending frame was from a
1485 * previous attempt at starting a GO Negotiation.
1486 */
1487 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1488 os_free(p2p->after_scan_tx);
1489 p2p->after_scan_tx = NULL;
1490 }
1491
1492 dev->wps_method = wps_method;
1493 dev->oob_pw_id = oob_pw_id;
1494 dev->status = P2P_SC_SUCCESS;
1495
1496 if (p2p->p2p_scan_running) {
1497 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1498 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1499 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1500 return 0;
1501 }
1502 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1503
1504 return p2p_connect_send(p2p, dev);
1505 }
1506
1507
1508 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1509 enum p2p_wps_method wps_method,
1510 int go_intent, const u8 *own_interface_addr,
1511 unsigned int force_freq, int persistent_group,
1512 const u8 *force_ssid, size_t force_ssid_len,
1513 unsigned int pref_freq, u16 oob_pw_id)
1514 {
1515 struct p2p_device *dev;
1516
1517 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1518 " GO Intent=%d Intended Interface Address=" MACSTR
1519 " wps_method=%d persistent_group=%d oob_pw_id=%u",
1520 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1521 wps_method, persistent_group, oob_pw_id);
1522
1523 dev = p2p_get_device(p2p, peer_addr);
1524 if (dev == NULL) {
1525 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1526 MAC2STR(peer_addr));
1527 return -1;
1528 }
1529
1530 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1531 15) < 0)
1532 return -1;
1533
1534 p2p->ssid_set = 0;
1535 if (force_ssid) {
1536 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1537 force_ssid, force_ssid_len);
1538 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1539 p2p->ssid_len = force_ssid_len;
1540 p2p->ssid_set = 1;
1541 }
1542
1543 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1544 dev->flags &= ~P2P_DEV_USER_REJECTED;
1545 dev->go_neg_req_sent = 0;
1546 dev->go_state = UNKNOWN_GO;
1547 p2p_set_dev_persistent(dev, persistent_group);
1548 p2p->go_intent = go_intent;
1549 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1550
1551 dev->wps_method = wps_method;
1552 dev->oob_pw_id = oob_pw_id;
1553 dev->status = P2P_SC_SUCCESS;
1554
1555 return 0;
1556 }
1557
1558
1559 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1560 struct p2p_device *dev, struct p2p_message *msg)
1561 {
1562 os_get_reltime(&dev->last_seen);
1563
1564 p2p_copy_wps_info(p2p, dev, 0, msg);
1565
1566 if (msg->listen_channel) {
1567 int freq;
1568 freq = p2p_channel_to_freq(msg->listen_channel[3],
1569 msg->listen_channel[4]);
1570 if (freq < 0) {
1571 p2p_dbg(p2p, "Unknown peer Listen channel: "
1572 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1573 msg->listen_channel[0],
1574 msg->listen_channel[1],
1575 msg->listen_channel[2],
1576 msg->listen_channel[3],
1577 msg->listen_channel[4]);
1578 } else {
1579 p2p_dbg(p2p, "Update peer " MACSTR
1580 " Listen channel: %u -> %u MHz",
1581 MAC2STR(dev->info.p2p_device_addr),
1582 dev->listen_freq, freq);
1583 dev->listen_freq = freq;
1584 }
1585 }
1586
1587 if (msg->wfd_subelems) {
1588 wpabuf_free(dev->info.wfd_subelems);
1589 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1590 }
1591
1592 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1593 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1594 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1595 } else {
1596 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1597 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1598 "listen_freq=%d",
1599 MAC2STR(dev->info.p2p_device_addr),
1600 dev->info.dev_capab, dev->info.group_capab,
1601 dev->info.device_name, dev->listen_freq);
1602 }
1603
1604 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1605
1606 if (dev->flags & P2P_DEV_USER_REJECTED) {
1607 p2p_dbg(p2p, "Do not report rejected device");
1608 return;
1609 }
1610
1611 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1612 !(dev->flags & P2P_DEV_REPORTED_ONCE));
1613 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1614 }
1615
1616
1617 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1618 {
1619 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1620 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1621 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1622 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1623 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1624 }
1625
1626
1627 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1628 {
1629 p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1630 p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1631 return 0;
1632 }
1633
1634
1635 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1636 {
1637 struct p2p_go_neg_results res;
1638 int go = peer->go_state == LOCAL_GO;
1639 struct p2p_channels intersection;
1640 int freqs;
1641 size_t i, j;
1642
1643 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1644 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1645
1646 os_memset(&res, 0, sizeof(res));
1647 res.role_go = go;
1648 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1649 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1650 res.wps_method = peer->wps_method;
1651 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1652 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1653 res.persistent_group = 2;
1654 else
1655 res.persistent_group = 1;
1656 }
1657
1658 if (go) {
1659 /* Setup AP mode for WPS provisioning */
1660 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1661 p2p->op_channel);
1662 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1663 res.ssid_len = p2p->ssid_len;
1664 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1665 } else {
1666 res.freq = peer->oper_freq;
1667 if (p2p->ssid_len) {
1668 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1669 res.ssid_len = p2p->ssid_len;
1670 }
1671 }
1672
1673 p2p_channels_dump(p2p, "own channels", &p2p->channels);
1674 p2p_channels_dump(p2p, "peer channels", &peer->channels);
1675 p2p_channels_intersect(&p2p->channels, &peer->channels,
1676 &intersection);
1677 if (go) {
1678 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1679 p2p_channels_dump(p2p, "intersection after no-GO removal",
1680 &intersection);
1681 }
1682 freqs = 0;
1683 for (i = 0; i < intersection.reg_classes; i++) {
1684 struct p2p_reg_class *c = &intersection.reg_class[i];
1685 if (freqs + 1 == P2P_MAX_CHANNELS)
1686 break;
1687 for (j = 0; j < c->channels; j++) {
1688 int freq;
1689 if (freqs + 1 == P2P_MAX_CHANNELS)
1690 break;
1691 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]);
1692 if (freq < 0)
1693 continue;
1694 res.freq_list[freqs++] = freq;
1695 }
1696 }
1697
1698 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1699
1700 p2p_clear_timeout(p2p);
1701 p2p->ssid_set = 0;
1702 peer->go_neg_req_sent = 0;
1703 peer->wps_method = WPS_NOT_READY;
1704 peer->oob_pw_id = 0;
1705 wpabuf_free(peer->go_neg_conf);
1706 peer->go_neg_conf = NULL;
1707
1708 p2p_set_state(p2p, P2P_PROVISIONING);
1709 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1710 }
1711
1712
1713 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1714 const u8 *data, size_t len, int rx_freq)
1715 {
1716 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1717 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1718
1719 if (len < 1)
1720 return;
1721
1722 switch (data[0]) {
1723 case P2P_GO_NEG_REQ:
1724 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1725 break;
1726 case P2P_GO_NEG_RESP:
1727 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1728 break;
1729 case P2P_GO_NEG_CONF:
1730 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1731 break;
1732 case P2P_INVITATION_REQ:
1733 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1734 rx_freq);
1735 break;
1736 case P2P_INVITATION_RESP:
1737 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
1738 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1739 break;
1740 case P2P_PROV_DISC_REQ:
1741 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1742 break;
1743 case P2P_PROV_DISC_RESP:
1744 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1745 break;
1746 case P2P_DEV_DISC_REQ:
1747 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1748 break;
1749 case P2P_DEV_DISC_RESP:
1750 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1751 break;
1752 default:
1753 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1754 data[0]);
1755 break;
1756 }
1757 }
1758
1759
1760 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1761 const u8 *sa, const u8 *bssid, const u8 *data,
1762 size_t len, int freq)
1763 {
1764 if (len < 1)
1765 return;
1766
1767 switch (data[0]) {
1768 case WLAN_PA_VENDOR_SPECIFIC:
1769 data++;
1770 len--;
1771 if (len < 4)
1772 return;
1773 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1774 return;
1775
1776 data += 4;
1777 len -= 4;
1778
1779 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1780 break;
1781 case WLAN_PA_GAS_INITIAL_REQ:
1782 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1783 break;
1784 case WLAN_PA_GAS_INITIAL_RESP:
1785 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1786 break;
1787 case WLAN_PA_GAS_COMEBACK_REQ:
1788 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1789 break;
1790 case WLAN_PA_GAS_COMEBACK_RESP:
1791 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1792 break;
1793 }
1794 }
1795
1796
1797 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1798 const u8 *bssid, u8 category,
1799 const u8 *data, size_t len, int freq)
1800 {
1801 if (category == WLAN_ACTION_PUBLIC) {
1802 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1803 return;
1804 }
1805
1806 if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1807 return;
1808
1809 if (len < 4)
1810 return;
1811
1812 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1813 return;
1814 data += 4;
1815 len -= 4;
1816
1817 /* P2P action frame */
1818 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1819 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1820
1821 if (len < 1)
1822 return;
1823 switch (data[0]) {
1824 case P2P_NOA:
1825 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1826 /* TODO */
1827 break;
1828 case P2P_PRESENCE_REQ:
1829 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1830 break;
1831 case P2P_PRESENCE_RESP:
1832 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1833 break;
1834 case P2P_GO_DISC_REQ:
1835 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1836 break;
1837 default:
1838 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1839 break;
1840 }
1841 }
1842
1843
1844 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1845 {
1846 struct p2p_data *p2p = eloop_ctx;
1847 if (p2p->go_neg_peer == NULL)
1848 return;
1849 if (p2p->pending_listen_freq) {
1850 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1851 p2p->pending_listen_freq = 0;
1852 }
1853 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1854 p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1855 /*
1856 * Set new timeout to make sure a previously set one does not expire
1857 * too quickly while waiting for the GO Negotiation to complete.
1858 */
1859 p2p_set_timeout(p2p, 0, 500000);
1860 p2p_connect_send(p2p, p2p->go_neg_peer);
1861 }
1862
1863
1864 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1865 {
1866 struct p2p_data *p2p = eloop_ctx;
1867 if (p2p->invite_peer == NULL)
1868 return;
1869 if (p2p->pending_listen_freq) {
1870 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1871 p2p->pending_listen_freq = 0;
1872 }
1873 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1874 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1875 p2p->invite_dev_pw_id);
1876 }
1877
1878
1879 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1880 const u8 *ie, size_t ie_len)
1881 {
1882 struct p2p_message msg;
1883 struct p2p_device *dev;
1884
1885 os_memset(&msg, 0, sizeof(msg));
1886 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1887 {
1888 p2p_parse_free(&msg);
1889 return; /* not a P2P probe */
1890 }
1891
1892 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1893 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1894 != 0) {
1895 /* The Probe Request is not part of P2P Device Discovery. It is
1896 * not known whether the source address of the frame is the P2P
1897 * Device Address or P2P Interface Address. Do not add a new
1898 * peer entry based on this frames.
1899 */
1900 p2p_parse_free(&msg);
1901 return;
1902 }
1903
1904 dev = p2p_get_device(p2p, addr);
1905 if (dev) {
1906 if (dev->country[0] == 0 && msg.listen_channel)
1907 os_memcpy(dev->country, msg.listen_channel, 3);
1908 os_get_reltime(&dev->last_seen);
1909 p2p_parse_free(&msg);
1910 return; /* already known */
1911 }
1912
1913 dev = p2p_create_device(p2p, addr);
1914 if (dev == NULL) {
1915 p2p_parse_free(&msg);
1916 return;
1917 }
1918
1919 os_get_reltime(&dev->last_seen);
1920 dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1921
1922 if (msg.listen_channel) {
1923 os_memcpy(dev->country, msg.listen_channel, 3);
1924 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
1925 msg.listen_channel[4]);
1926 }
1927
1928 p2p_copy_wps_info(p2p, dev, 1, &msg);
1929
1930 if (msg.wfd_subelems) {
1931 wpabuf_free(dev->info.wfd_subelems);
1932 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1933 }
1934
1935 p2p_parse_free(&msg);
1936
1937 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
1938 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1939 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1940 dev->info.group_capab, dev->info.device_name,
1941 dev->listen_freq);
1942 }
1943
1944
1945 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1946 const u8 *addr,
1947 struct p2p_message *msg)
1948 {
1949 struct p2p_device *dev;
1950
1951 dev = p2p_get_device(p2p, addr);
1952 if (dev) {
1953 os_get_reltime(&dev->last_seen);
1954 return dev; /* already known */
1955 }
1956
1957 dev = p2p_create_device(p2p, addr);
1958 if (dev == NULL)
1959 return NULL;
1960
1961 p2p_add_dev_info(p2p, addr, dev, msg);
1962
1963 return dev;
1964 }
1965
1966
1967 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1968 {
1969 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1970 return 1;
1971 if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1972 WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1973 WPA_GET_BE16(&req_dev_type[6]) == 0)
1974 return 1; /* Category match with wildcard OUI/sub-category */
1975 return 0;
1976 }
1977
1978
1979 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1980 size_t num_req_dev_type)
1981 {
1982 size_t i;
1983 for (i = 0; i < num_req_dev_type; i++) {
1984 if (dev_type_match(dev_type, req_dev_type[i]))
1985 return 1;
1986 }
1987 return 0;
1988 }
1989
1990
1991 /**
1992 * p2p_match_dev_type - Match local device type with requested type
1993 * @p2p: P2P module context from p2p_init()
1994 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1995 * Returns: 1 on match, 0 on mismatch
1996 *
1997 * This function can be used to match the Requested Device Type attribute in
1998 * WPS IE with the local device types for deciding whether to reply to a Probe
1999 * Request frame.
2000 */
2001 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2002 {
2003 struct wps_parse_attr attr;
2004 size_t i;
2005
2006 if (wps_parse_msg(wps, &attr))
2007 return 1; /* assume no Requested Device Type attributes */
2008
2009 if (attr.num_req_dev_type == 0)
2010 return 1; /* no Requested Device Type attributes -> match */
2011
2012 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2013 attr.num_req_dev_type))
2014 return 1; /* Own Primary Device Type matches */
2015
2016 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2017 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2018 attr.req_dev_type,
2019 attr.num_req_dev_type))
2020 return 1; /* Own Secondary Device Type matches */
2021 }
2022
2023 /* No matching device type found */
2024 return 0;
2025 }
2026
2027
2028 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
2029 {
2030 struct wpabuf *buf;
2031 u8 *len;
2032 int pw_id = -1;
2033 size_t extra = 0;
2034
2035 #ifdef CONFIG_WIFI_DISPLAY
2036 if (p2p->wfd_ie_probe_resp)
2037 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2038 #endif /* CONFIG_WIFI_DISPLAY */
2039
2040 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2041 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2042
2043 buf = wpabuf_alloc(1000 + extra);
2044 if (buf == NULL)
2045 return NULL;
2046
2047 if (p2p->go_neg_peer) {
2048 /* Advertise immediate availability of WPS credential */
2049 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2050 }
2051
2052 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2053 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2054 wpabuf_free(buf);
2055 return NULL;
2056 }
2057
2058 #ifdef CONFIG_WIFI_DISPLAY
2059 if (p2p->wfd_ie_probe_resp)
2060 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2061 #endif /* CONFIG_WIFI_DISPLAY */
2062
2063 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2064 wpabuf_put_buf(buf,
2065 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2066
2067 /* P2P IE */
2068 len = p2p_buf_add_ie_hdr(buf);
2069 p2p_buf_add_capability(buf, p2p->dev_capab &
2070 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2071 if (p2p->ext_listen_interval)
2072 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2073 p2p->ext_listen_interval);
2074 p2p_buf_add_device_info(buf, p2p, NULL);
2075 p2p_buf_update_ie_hdr(buf, len);
2076
2077 return buf;
2078 }
2079
2080
2081 static enum p2p_probe_req_status
2082 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2083 const u8 *bssid, const u8 *ie, size_t ie_len)
2084 {
2085 struct ieee802_11_elems elems;
2086 struct wpabuf *buf;
2087 struct ieee80211_mgmt *resp;
2088 struct p2p_message msg;
2089 struct wpabuf *ies;
2090
2091 if (!p2p->in_listen || !p2p->drv_in_listen) {
2092 /* not in Listen state - ignore Probe Request */
2093 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2094 p2p->in_listen, p2p->drv_in_listen);
2095 return P2P_PREQ_NOT_LISTEN;
2096 }
2097
2098 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2099 ParseFailed) {
2100 /* Ignore invalid Probe Request frames */
2101 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2102 return P2P_PREQ_MALFORMED;
2103 }
2104
2105 if (elems.p2p == NULL) {
2106 /* not a P2P probe - ignore it */
2107 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2108 return P2P_PREQ_NOT_P2P;
2109 }
2110
2111 if (dst && !is_broadcast_ether_addr(dst) &&
2112 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2113 /* Not sent to the broadcast address or our P2P Device Address
2114 */
2115 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2116 MAC2STR(dst));
2117 return P2P_PREQ_NOT_PROCESSED;
2118 }
2119
2120 if (bssid && !is_broadcast_ether_addr(bssid)) {
2121 /* Not sent to the Wildcard BSSID */
2122 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2123 MAC2STR(bssid));
2124 return P2P_PREQ_NOT_PROCESSED;
2125 }
2126
2127 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2128 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2129 0) {
2130 /* not using P2P Wildcard SSID - ignore */
2131 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2132 return P2P_PREQ_NOT_PROCESSED;
2133 }
2134
2135 if (supp_rates_11b_only(&elems)) {
2136 /* Indicates support for 11b rates only */
2137 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2138 return P2P_PREQ_NOT_P2P;
2139 }
2140
2141 os_memset(&msg, 0, sizeof(msg));
2142 if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2143 /* Could not parse P2P attributes */
2144 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2145 return P2P_PREQ_NOT_P2P;
2146 }
2147
2148 if (msg.device_id &&
2149 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2150 /* Device ID did not match */
2151 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2152 MAC2STR(msg.device_id));
2153 p2p_parse_free(&msg);
2154 return P2P_PREQ_NOT_PROCESSED;
2155 }
2156
2157 /* Check Requested Device Type match */
2158 if (msg.wps_attributes &&
2159 !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2160 /* No match with Requested Device Type */
2161 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2162 p2p_parse_free(&msg);
2163 return P2P_PREQ_NOT_PROCESSED;
2164 }
2165 p2p_parse_free(&msg);
2166
2167 if (!p2p->cfg->send_probe_resp) {
2168 /* Response generated elsewhere */
2169 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2170 return P2P_PREQ_NOT_PROCESSED;
2171 }
2172
2173 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2174
2175 /*
2176 * We do not really have a specific BSS that this frame is advertising,
2177 * so build a frame that has some information in valid format. This is
2178 * really only used for discovery purposes, not to learn exact BSS
2179 * parameters.
2180 */
2181 ies = p2p_build_probe_resp_ies(p2p);
2182 if (ies == NULL)
2183 return P2P_PREQ_NOT_PROCESSED;
2184
2185 buf = wpabuf_alloc(200 + wpabuf_len(ies));
2186 if (buf == NULL) {
2187 wpabuf_free(ies);
2188 return P2P_PREQ_NOT_PROCESSED;
2189 }
2190
2191 resp = NULL;
2192 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2193
2194 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2195 (WLAN_FC_STYPE_PROBE_RESP << 4));
2196 os_memcpy(resp->da, addr, ETH_ALEN);
2197 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2198 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2199 resp->u.probe_resp.beacon_int = host_to_le16(100);
2200 /* hardware or low-level driver will setup seq_ctrl and timestamp */
2201 resp->u.probe_resp.capab_info =
2202 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2203 WLAN_CAPABILITY_PRIVACY |
2204 WLAN_CAPABILITY_SHORT_SLOT_TIME);
2205
2206 wpabuf_put_u8(buf, WLAN_EID_SSID);
2207 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2208 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2209
2210 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2211 wpabuf_put_u8(buf, 8);
2212 wpabuf_put_u8(buf, (60 / 5) | 0x80);
2213 wpabuf_put_u8(buf, 90 / 5);
2214 wpabuf_put_u8(buf, (120 / 5) | 0x80);
2215 wpabuf_put_u8(buf, 180 / 5);
2216 wpabuf_put_u8(buf, (240 / 5) | 0x80);
2217 wpabuf_put_u8(buf, 360 / 5);
2218 wpabuf_put_u8(buf, 480 / 5);
2219 wpabuf_put_u8(buf, 540 / 5);
2220
2221 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2222 wpabuf_put_u8(buf, 1);
2223 wpabuf_put_u8(buf, p2p->cfg->channel);
2224
2225 wpabuf_put_buf(buf, ies);
2226 wpabuf_free(ies);
2227
2228 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2229
2230 wpabuf_free(buf);
2231
2232 return P2P_PREQ_NOT_PROCESSED;
2233 }
2234
2235
2236 enum p2p_probe_req_status
2237 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2238 const u8 *bssid, const u8 *ie, size_t ie_len)
2239 {
2240 enum p2p_probe_req_status res;
2241
2242 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2243
2244 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2245
2246 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2247 p2p->go_neg_peer &&
2248 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2249 == 0 &&
2250 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2251 /* Received a Probe Request from GO Negotiation peer */
2252 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2253 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2254 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2255 return P2P_PREQ_PROCESSED;
2256 }
2257
2258 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2259 p2p->invite_peer &&
2260 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2261 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2262 == 0) {
2263 /* Received a Probe Request from Invite peer */
2264 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2265 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2266 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2267 return P2P_PREQ_PROCESSED;
2268 }
2269
2270 return res;
2271 }
2272
2273
2274 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2275 u8 *buf, size_t len, struct wpabuf *p2p_ie)
2276 {
2277 struct wpabuf *tmp;
2278 u8 *lpos;
2279 size_t tmplen;
2280 int res;
2281 u8 group_capab;
2282
2283 if (p2p_ie == NULL)
2284 return 0; /* WLAN AP is not a P2P manager */
2285
2286 /*
2287 * (Re)Association Request - P2P IE
2288 * P2P Capability attribute (shall be present)
2289 * P2P Interface attribute (present if concurrent device and
2290 * P2P Management is enabled)
2291 */
2292 tmp = wpabuf_alloc(200);
2293 if (tmp == NULL)
2294 return -1;
2295
2296 lpos = p2p_buf_add_ie_hdr(tmp);
2297 group_capab = 0;
2298 if (p2p->num_groups > 0) {
2299 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2300 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2301 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2302 p2p->cross_connect)
2303 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2304 }
2305 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2306 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2307 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2308 p2p_buf_add_p2p_interface(tmp, p2p);
2309 p2p_buf_update_ie_hdr(tmp, lpos);
2310
2311 tmplen = wpabuf_len(tmp);
2312 if (tmplen > len)
2313 res = -1;
2314 else {
2315 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2316 res = tmplen;
2317 }
2318 wpabuf_free(tmp);
2319
2320 return res;
2321 }
2322
2323
2324 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2325 size_t len, int p2p_group, struct wpabuf *p2p_ie)
2326 {
2327 struct wpabuf *tmp;
2328 u8 *lpos;
2329 struct p2p_device *peer;
2330 size_t tmplen;
2331 int res;
2332 size_t extra = 0;
2333
2334 if (!p2p_group)
2335 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2336
2337 #ifdef CONFIG_WIFI_DISPLAY
2338 if (p2p->wfd_ie_assoc_req)
2339 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2340 #endif /* CONFIG_WIFI_DISPLAY */
2341
2342 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2343 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2344
2345 /*
2346 * (Re)Association Request - P2P IE
2347 * P2P Capability attribute (shall be present)
2348 * Extended Listen Timing (may be present)
2349 * P2P Device Info attribute (shall be present)
2350 */
2351 tmp = wpabuf_alloc(200 + extra);
2352 if (tmp == NULL)
2353 return -1;
2354
2355 #ifdef CONFIG_WIFI_DISPLAY
2356 if (p2p->wfd_ie_assoc_req)
2357 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2358 #endif /* CONFIG_WIFI_DISPLAY */
2359
2360 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2361 wpabuf_put_buf(tmp,
2362 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2363
2364 peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2365
2366 lpos = p2p_buf_add_ie_hdr(tmp);
2367 p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2368 if (p2p->ext_listen_interval)
2369 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2370 p2p->ext_listen_interval);
2371 p2p_buf_add_device_info(tmp, p2p, peer);
2372 p2p_buf_update_ie_hdr(tmp, lpos);
2373
2374 tmplen = wpabuf_len(tmp);
2375 if (tmplen > len)
2376 res = -1;
2377 else {
2378 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2379 res = tmplen;
2380 }
2381 wpabuf_free(tmp);
2382
2383 return res;
2384 }
2385
2386
2387 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2388 {
2389 struct wpabuf *p2p_ie;
2390 int ret;
2391
2392 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2393 if (p2p_ie == NULL)
2394 return 0;
2395
2396 ret = p2p_attr_text(p2p_ie, buf, end);
2397 wpabuf_free(p2p_ie);
2398 return ret;
2399 }
2400
2401
2402 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2403 {
2404 struct p2p_message msg;
2405
2406 os_memset(&msg, 0, sizeof(msg));
2407 if (p2p_parse_p2p_ie(p2p_ie, &msg))
2408 return -1;
2409
2410 if (msg.p2p_device_addr) {
2411 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2412 return 0;
2413 } else if (msg.device_id) {
2414 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2415 return 0;
2416 }
2417 return -1;
2418 }
2419
2420
2421 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2422 {
2423 struct wpabuf *p2p_ie;
2424 int ret;
2425
2426 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2427 P2P_IE_VENDOR_TYPE);
2428 if (p2p_ie == NULL)
2429 return -1;
2430 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2431 wpabuf_free(p2p_ie);
2432 return ret;
2433 }
2434
2435
2436 static void p2p_clear_go_neg(struct p2p_data *p2p)
2437 {
2438 p2p->go_neg_peer = NULL;
2439 p2p_clear_timeout(p2p);
2440 p2p_set_state(p2p, P2P_IDLE);
2441 }
2442
2443
2444 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2445 {
2446 if (p2p->go_neg_peer == NULL) {
2447 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2448 return; /* No pending Group Formation */
2449 }
2450
2451 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2452 0) {
2453 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2454 MACSTR " (GO Negotiation peer " MACSTR ")",
2455 MAC2STR(mac_addr),
2456 MAC2STR(p2p->go_neg_peer->intended_addr));
2457 return; /* Ignore unexpected peer address */
2458 }
2459
2460 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2461 MAC2STR(mac_addr));
2462
2463 p2p_clear_go_neg(p2p);
2464 }
2465
2466
2467 void p2p_group_formation_failed(struct p2p_data *p2p)
2468 {
2469 if (p2p->go_neg_peer == NULL) {
2470 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2471 return; /* No pending Group Formation */
2472 }
2473
2474 p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2475 MAC2STR(p2p->go_neg_peer->intended_addr));
2476
2477 p2p_clear_go_neg(p2p);
2478 }
2479
2480
2481 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2482 {
2483 struct p2p_data *p2p;
2484
2485 if (cfg->max_peers < 1 ||
2486 cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2487 return NULL;
2488
2489 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2490 if (p2p == NULL)
2491 return NULL;
2492 p2p->cfg = (struct p2p_config *) (p2p + 1);
2493 os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2494 if (cfg->dev_name)
2495 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2496 if (cfg->manufacturer)
2497 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2498 if (cfg->model_name)
2499 p2p->cfg->model_name = os_strdup(cfg->model_name);
2500 if (cfg->model_number)
2501 p2p->cfg->model_number = os_strdup(cfg->model_number);
2502 if (cfg->serial_number)
2503 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2504 if (cfg->pref_chan) {
2505 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2506 sizeof(struct p2p_channel));
2507 if (p2p->cfg->pref_chan) {
2508 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2509 cfg->num_pref_chan *
2510 sizeof(struct p2p_channel));
2511 } else
2512 p2p->cfg->num_pref_chan = 0;
2513 }
2514
2515 p2p->min_disc_int = 1;
2516 p2p->max_disc_int = 3;
2517 p2p->max_disc_tu = -1;
2518
2519 if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2520 p2p->next_tie_breaker = 0;
2521 p2p->next_tie_breaker &= 0x01;
2522 if (cfg->sd_request)
2523 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2524 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2525 if (cfg->concurrent_operations)
2526 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2527 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2528
2529 dl_list_init(&p2p->devices);
2530
2531 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2532 p2p_expiration_timeout, p2p, NULL);
2533
2534 p2p->go_timeout = 100;
2535 p2p->client_timeout = 20;
2536 p2p->num_p2p_sd_queries = 0;
2537
2538 p2p_dbg(p2p, "initialized");
2539 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2540 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2541
2542 return p2p;
2543 }
2544
2545
2546 void p2p_deinit(struct p2p_data *p2p)
2547 {
2548 #ifdef CONFIG_WIFI_DISPLAY
2549 wpabuf_free(p2p->wfd_ie_beacon);
2550 wpabuf_free(p2p->wfd_ie_probe_req);
2551 wpabuf_free(p2p->wfd_ie_probe_resp);
2552 wpabuf_free(p2p->wfd_ie_assoc_req);
2553 wpabuf_free(p2p->wfd_ie_invitation);
2554 wpabuf_free(p2p->wfd_ie_prov_disc_req);
2555 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2556 wpabuf_free(p2p->wfd_ie_go_neg);
2557 wpabuf_free(p2p->wfd_dev_info);
2558 wpabuf_free(p2p->wfd_assoc_bssid);
2559 wpabuf_free(p2p->wfd_coupled_sink_info);
2560 #endif /* CONFIG_WIFI_DISPLAY */
2561
2562 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2563 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2564 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2565 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2566 p2p_flush(p2p);
2567 p2p_free_req_dev_types(p2p);
2568 os_free(p2p->cfg->dev_name);
2569 os_free(p2p->cfg->manufacturer);
2570 os_free(p2p->cfg->model_name);
2571 os_free(p2p->cfg->model_number);
2572 os_free(p2p->cfg->serial_number);
2573 os_free(p2p->cfg->pref_chan);
2574 os_free(p2p->groups);
2575 wpabuf_free(p2p->sd_resp);
2576 os_free(p2p->after_scan_tx);
2577 p2p_remove_wps_vendor_extensions(p2p);
2578 os_free(p2p->no_go_freq.range);
2579 os_free(p2p);
2580 }
2581
2582
2583 void p2p_flush(struct p2p_data *p2p)
2584 {
2585 struct p2p_device *dev, *prev;
2586 p2p_stop_find(p2p);
2587 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2588 list) {
2589 dl_list_del(&dev->list);
2590 p2p_device_free(p2p, dev);
2591 }
2592 p2p_free_sd_queries(p2p);
2593 os_free(p2p->after_scan_tx);
2594 p2p->after_scan_tx = NULL;
2595 }
2596
2597
2598 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2599 {
2600 struct p2p_device *dev;
2601
2602 dev = p2p_get_device(p2p, addr);
2603 if (dev == NULL)
2604 return -1;
2605
2606 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2607
2608 if (p2p->go_neg_peer == dev)
2609 p2p->go_neg_peer = NULL;
2610
2611 dev->wps_method = WPS_NOT_READY;
2612 dev->oob_pw_id = 0;
2613 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2614 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2615
2616 /* Check if after_scan_tx is for this peer. If so free it */
2617 if (p2p->after_scan_tx &&
2618 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2619 os_free(p2p->after_scan_tx);
2620 p2p->after_scan_tx = NULL;
2621 }
2622
2623 return 0;
2624 }
2625
2626
2627 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2628 {
2629 os_free(p2p->cfg->dev_name);
2630 if (dev_name) {
2631 p2p->cfg->dev_name = os_strdup(dev_name);
2632 if (p2p->cfg->dev_name == NULL)
2633 return -1;
2634 } else
2635 p2p->cfg->dev_name = NULL;
2636 return 0;
2637 }
2638
2639
2640 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2641 {
2642 os_free(p2p->cfg->manufacturer);
2643 p2p->cfg->manufacturer = NULL;
2644 if (manufacturer) {
2645 p2p->cfg->manufacturer = os_strdup(manufacturer);
2646 if (p2p->cfg->manufacturer == NULL)
2647 return -1;
2648 }
2649
2650 return 0;
2651 }
2652
2653
2654 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2655 {
2656 os_free(p2p->cfg->model_name);
2657 p2p->cfg->model_name = NULL;
2658 if (model_name) {
2659 p2p->cfg->model_name = os_strdup(model_name);
2660 if (p2p->cfg->model_name == NULL)
2661 return -1;
2662 }
2663
2664 return 0;
2665 }
2666
2667
2668 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2669 {
2670 os_free(p2p->cfg->model_number);
2671 p2p->cfg->model_number = NULL;
2672 if (model_number) {
2673 p2p->cfg->model_number = os_strdup(model_number);
2674 if (p2p->cfg->model_number == NULL)
2675 return -1;
2676 }
2677
2678 return 0;
2679 }
2680
2681
2682 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2683 {
2684 os_free(p2p->cfg->serial_number);
2685 p2p->cfg->serial_number = NULL;
2686 if (serial_number) {
2687 p2p->cfg->serial_number = os_strdup(serial_number);
2688 if (p2p->cfg->serial_number == NULL)
2689 return -1;
2690 }
2691
2692 return 0;
2693 }
2694
2695
2696 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2697 {
2698 p2p->cfg->config_methods = config_methods;
2699 }
2700
2701
2702 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2703 {
2704 os_memcpy(p2p->cfg->uuid, uuid, 16);
2705 }
2706
2707
2708 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2709 {
2710 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2711 return 0;
2712 }
2713
2714
2715 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2716 size_t num_dev_types)
2717 {
2718 if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2719 num_dev_types = P2P_SEC_DEVICE_TYPES;
2720 p2p->cfg->num_sec_dev_types = num_dev_types;
2721 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2722 return 0;
2723 }
2724
2725
2726 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2727 {
2728 int i;
2729
2730 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2731 wpabuf_free(p2p->wps_vendor_ext[i]);
2732 p2p->wps_vendor_ext[i] = NULL;
2733 }
2734 }
2735
2736
2737 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2738 const struct wpabuf *vendor_ext)
2739 {
2740 int i;
2741
2742 if (vendor_ext == NULL)
2743 return -1;
2744
2745 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2746 if (p2p->wps_vendor_ext[i] == NULL)
2747 break;
2748 }
2749 if (i >= P2P_MAX_WPS_VENDOR_EXT)
2750 return -1;
2751
2752 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2753 if (p2p->wps_vendor_ext[i] == NULL)
2754 return -1;
2755
2756 return 0;
2757 }
2758
2759
2760 int p2p_set_country(struct p2p_data *p2p, const char *country)
2761 {
2762 os_memcpy(p2p->cfg->country, country, 3);
2763 return 0;
2764 }
2765
2766
2767 void p2p_continue_find(struct p2p_data *p2p)
2768 {
2769 struct p2p_device *dev;
2770 p2p_set_state(p2p, P2P_SEARCH);
2771 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2772 if (dev->sd_pending_bcast_queries == 0) {
2773 /* Initialize with total number of registered broadcast
2774 * SD queries. */
2775 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
2776 }
2777
2778 if (p2p_start_sd(p2p, dev) == 0)
2779 return;
2780 if (dev->req_config_methods &&
2781 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2782 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2783 MACSTR " (config methods 0x%x)",
2784 MAC2STR(dev->info.p2p_device_addr),
2785 dev->req_config_methods);
2786 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2787 return;
2788 }
2789 }
2790
2791 p2p_listen_in_find(p2p, 1);
2792 }
2793
2794
2795 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2796 {
2797 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
2798 success);
2799 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2800
2801 if (!success) {
2802 p2p->sd_peer = NULL;
2803 p2p_continue_find(p2p);
2804 return;
2805 }
2806
2807 if (p2p->sd_peer == NULL) {
2808 p2p_dbg(p2p, "No SD peer entry known");
2809 p2p_continue_find(p2p);
2810 return;
2811 }
2812
2813 if (p2p->sd_query->for_all_peers) {
2814 /* Update the pending broadcast SD query count for this device
2815 */
2816 p2p->sd_peer->sd_pending_bcast_queries--;
2817
2818 /*
2819 * If there are no pending broadcast queries for this device,
2820 * mark it as done (-1).
2821 */
2822 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
2823 p2p->sd_peer->sd_pending_bcast_queries = -1;
2824 }
2825
2826 /* Wait for response from the peer */
2827 p2p_set_state(p2p, P2P_SD_DURING_FIND);
2828 p2p_set_timeout(p2p, 0, 200000);
2829 }
2830
2831
2832 /**
2833 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2834 * @p2p: P2P module context from p2p_init()
2835 */
2836 static void p2p_retry_pd(struct p2p_data *p2p)
2837 {
2838 struct p2p_device *dev;
2839
2840 if (p2p->state != P2P_IDLE)
2841 return;
2842
2843 /*
2844 * Retry the prov disc req attempt only for the peer that the user had
2845 * requested.
2846 */
2847
2848 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2849 if (os_memcmp(p2p->pending_pd_devaddr,
2850 dev->info.p2p_device_addr, ETH_ALEN) != 0)
2851 continue;
2852 if (!dev->req_config_methods)
2853 continue;
2854
2855 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2856 MACSTR " (config methods 0x%x)",
2857 MAC2STR(dev->info.p2p_device_addr),
2858 dev->req_config_methods);
2859 p2p_send_prov_disc_req(p2p, dev,
2860 dev->flags & P2P_DEV_PD_FOR_JOIN,
2861 p2p->pd_force_freq);
2862 return;
2863 }
2864 }
2865
2866
2867 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2868 {
2869 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
2870 success);
2871
2872 /*
2873 * Postpone resetting the pending action state till after we actually
2874 * time out. This allows us to take some action like notifying any
2875 * interested parties about no response to the request.
2876 *
2877 * When the timer (below) goes off we check in IDLE, SEARCH, or
2878 * LISTEN_ONLY state, which are the only allowed states to issue a PD
2879 * requests in, if this was still pending and then raise notification.
2880 */
2881
2882 if (!success) {
2883 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2884
2885 if (p2p->user_initiated_pd &&
2886 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2887 {
2888 /* Retry request from timeout to avoid busy loops */
2889 p2p->pending_action_state = P2P_PENDING_PD;
2890 p2p_set_timeout(p2p, 0, 50000);
2891 } else if (p2p->state != P2P_IDLE)
2892 p2p_continue_find(p2p);
2893 else if (p2p->user_initiated_pd) {
2894 p2p->pending_action_state = P2P_PENDING_PD;
2895 p2p_set_timeout(p2p, 0, 300000);
2896 }
2897 return;
2898 }
2899
2900 /*
2901 * This postponing, of resetting pending_action_state, needs to be
2902 * done only for user initiated PD requests and not internal ones.
2903 */
2904 if (p2p->user_initiated_pd)
2905 p2p->pending_action_state = P2P_PENDING_PD;
2906 else
2907 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2908
2909 /* Wait for response from the peer */
2910 if (p2p->state == P2P_SEARCH)
2911 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2912 p2p_set_timeout(p2p, 0, 200000);
2913 }
2914
2915
2916 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2917 struct os_reltime *rx_time, int level, const u8 *ies,
2918 size_t ies_len)
2919 {
2920 if (os_reltime_before(rx_time, &p2p->find_start)) {
2921 /*
2922 * The driver may have cached (e.g., in cfg80211 BSS table) the
2923 * scan results for relatively long time. To avoid reporting
2924 * stale information, update P2P peers only based on results
2925 * that have based on frames received after the last p2p_find
2926 * operation was started.
2927 */
2928 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
2929 " (rx_time=%u.%06u)",
2930 MAC2STR(bssid), (unsigned int) rx_time->sec,
2931 (unsigned int) rx_time->usec);
2932 return 0;
2933 }
2934
2935 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
2936
2937 return 0;
2938 }
2939
2940
2941 void p2p_scan_res_handled(struct p2p_data *p2p)
2942 {
2943 if (!p2p->p2p_scan_running) {
2944 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
2945 }
2946 p2p->p2p_scan_running = 0;
2947 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2948
2949 if (p2p_run_after_scan(p2p))
2950 return;
2951 if (p2p->state == P2P_SEARCH)
2952 p2p_continue_find(p2p);
2953 }
2954
2955
2956 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2957 {
2958 u8 *len;
2959
2960 #ifdef CONFIG_WIFI_DISPLAY
2961 if (p2p->wfd_ie_probe_req)
2962 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
2963 #endif /* CONFIG_WIFI_DISPLAY */
2964
2965 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
2966 wpabuf_put_buf(ies,
2967 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
2968
2969 len = p2p_buf_add_ie_hdr(ies);
2970 p2p_buf_add_capability(ies, p2p->dev_capab &
2971 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2972 if (dev_id)
2973 p2p_buf_add_device_id(ies, dev_id);
2974 if (p2p->cfg->reg_class && p2p->cfg->channel)
2975 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
2976 p2p->cfg->reg_class,
2977 p2p->cfg->channel);
2978 if (p2p->ext_listen_interval)
2979 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
2980 p2p->ext_listen_interval);
2981 /* TODO: p2p_buf_add_operating_channel() if GO */
2982 p2p_buf_update_ie_hdr(ies, len);
2983 }
2984
2985
2986 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
2987 {
2988 size_t len = 100;
2989
2990 #ifdef CONFIG_WIFI_DISPLAY
2991 if (p2p && p2p->wfd_ie_probe_req)
2992 len += wpabuf_len(p2p->wfd_ie_probe_req);
2993 #endif /* CONFIG_WIFI_DISPLAY */
2994
2995 if (p2p && p2p->vendor_elem &&
2996 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
2997 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
2998
2999 return len;
3000 }
3001
3002
3003 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3004 {
3005 return p2p_attr_text(p2p_ie, buf, end);
3006 }
3007
3008
3009 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3010 {
3011 struct p2p_device *dev = p2p->go_neg_peer;
3012 int timeout;
3013
3014 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3015
3016 if (dev == NULL) {
3017 p2p_dbg(p2p, "No pending GO Negotiation");
3018 return;
3019 }
3020
3021 if (success) {
3022 if (dev->flags & P2P_DEV_USER_REJECTED) {
3023 p2p_set_state(p2p, P2P_IDLE);
3024 return;
3025 }
3026 } else if (dev->go_neg_req_sent) {
3027 /* Cancel the increment from p2p_connect_send() on failure */
3028 dev->go_neg_req_sent--;
3029 }
3030
3031 if (!success &&
3032 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3033 !is_zero_ether_addr(dev->member_in_go_dev)) {
3034 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3035 MAC2STR(dev->info.p2p_device_addr));
3036 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3037 p2p_send_dev_disc_req(p2p, dev);
3038 return;
3039 }
3040
3041 /*
3042 * Use P2P find, if needed, to find the other device from its listen
3043 * channel.
3044 */
3045 p2p_set_state(p2p, P2P_CONNECT);
3046 timeout = success ? 500000 : 100000;
3047 if (!success && p2p->go_neg_peer &&
3048 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3049 unsigned int r;
3050 /*
3051 * Peer is expected to wait our response and we will skip the
3052 * listen phase. Add some randomness to the wait time here to
3053 * make it less likely to hit cases where we could end up in
3054 * sync with peer not listening.
3055 */
3056 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3057 r = 0;
3058 timeout += r % 100000;
3059 }
3060 p2p_set_timeout(p2p, 0, timeout);
3061 }
3062
3063
3064 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3065 {
3066 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3067 success);
3068 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3069 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3070 return;
3071 }
3072 p2p_set_state(p2p, P2P_CONNECT);
3073 p2p_set_timeout(p2p, 0, 500000);
3074 }
3075
3076
3077 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3078 const u8 *addr)
3079 {
3080 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3081 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3082 p2p_go_neg_failed(p2p, p2p->go_neg_peer,
3083 p2p->go_neg_peer->status);
3084 } else if (success) {
3085 struct p2p_device *dev;
3086 dev = p2p_get_device(p2p, addr);
3087 if (dev &&
3088 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3089 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3090 }
3091 }
3092
3093
3094 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3095 enum p2p_send_action_result result)
3096 {
3097 struct p2p_device *dev;
3098
3099 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3100 if (result == P2P_SEND_ACTION_FAILED) {
3101 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3102 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3103 return;
3104 }
3105
3106 dev = p2p->go_neg_peer;
3107
3108 if (result == P2P_SEND_ACTION_NO_ACK) {
3109 /*
3110 * Retry GO Negotiation Confirmation
3111 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3112 * ACK for confirmation.
3113 */
3114 if (dev && dev->go_neg_conf &&
3115 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3116 p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3117 dev->go_neg_conf_sent);
3118 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3119 if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3120 dev->info.p2p_device_addr,
3121 p2p->cfg->dev_addr,
3122 dev->info.p2p_device_addr,
3123 wpabuf_head(dev->go_neg_conf),
3124 wpabuf_len(dev->go_neg_conf), 0) >=
3125 0) {
3126 dev->go_neg_conf_sent++;
3127 return;
3128 }
3129 p2p_dbg(p2p, "Failed to re-send Action frame");
3130
3131 /*
3132 * Continue with the assumption that the first attempt
3133 * went through and just the ACK frame was lost.
3134 */
3135 }
3136
3137 /*
3138 * It looks like the TX status for GO Negotiation Confirm is
3139 * often showing failure even when the peer has actually
3140 * received the frame. Since the peer may change channels
3141 * immediately after having received the frame, we may not see
3142 * an Ack for retries, so just dropping a single frame may
3143 * trigger this. To allow the group formation to succeed if the
3144 * peer did indeed receive the frame, continue regardless of
3145 * the TX status.
3146 */
3147 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3148 }
3149
3150 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3151
3152 if (dev == NULL)
3153 return;
3154
3155 p2p_go_complete(p2p, dev);
3156 }
3157
3158
3159 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3160 const u8 *src, const u8 *bssid,
3161 enum p2p_send_action_result result)
3162 {
3163 enum p2p_pending_action_state state;
3164 int success;
3165
3166 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3167 " src=" MACSTR " bssid=" MACSTR " result=%d",
3168 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3169 MAC2STR(bssid), result);
3170 success = result == P2P_SEND_ACTION_SUCCESS;
3171 state = p2p->pending_action_state;
3172 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3173 switch (state) {
3174 case P2P_NO_PENDING_ACTION:
3175 if (p2p->send_action_in_progress) {
3176 p2p->send_action_in_progress = 0;
3177 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3178 }
3179 if (p2p->after_scan_tx_in_progress) {
3180 p2p->after_scan_tx_in_progress = 0;
3181 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3182 p2p_run_after_scan(p2p))
3183 break;
3184 if (p2p->state == P2P_SEARCH) {
3185 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3186 p2p_continue_find(p2p);
3187 }
3188 }
3189 break;
3190 case P2P_PENDING_GO_NEG_REQUEST:
3191 p2p_go_neg_req_cb(p2p, success);
3192 break;
3193 case P2P_PENDING_GO_NEG_RESPONSE:
3194 p2p_go_neg_resp_cb(p2p, success);
3195 break;
3196 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3197 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3198 break;
3199 case P2P_PENDING_GO_NEG_CONFIRM:
3200 p2p_go_neg_conf_cb(p2p, result);
3201 break;
3202 case P2P_PENDING_SD:
3203 p2p_sd_cb(p2p, success);
3204 break;
3205 case P2P_PENDING_PD:
3206 p2p_prov_disc_cb(p2p, success);
3207 break;
3208 case P2P_PENDING_INVITATION_REQUEST:
3209 p2p_invitation_req_cb(p2p, success);
3210 break;
3211 case P2P_PENDING_INVITATION_RESPONSE:
3212 p2p_invitation_resp_cb(p2p, success);
3213 break;
3214 case P2P_PENDING_DEV_DISC_REQUEST:
3215 p2p_dev_disc_req_cb(p2p, success);
3216 break;
3217 case P2P_PENDING_DEV_DISC_RESPONSE:
3218 p2p_dev_disc_resp_cb(p2p, success);
3219 break;
3220 case P2P_PENDING_GO_DISC_REQ:
3221 p2p_go_disc_req_cb(p2p, success);
3222 break;
3223 }
3224
3225 p2p->after_scan_tx_in_progress = 0;
3226 }
3227
3228
3229 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3230 unsigned int duration)
3231 {
3232 if (freq == p2p->pending_client_disc_freq) {
3233 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3234 p2p->pending_client_disc_freq = 0;
3235 return;
3236 }
3237
3238 if (freq != p2p->pending_listen_freq) {
3239 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3240 freq, duration, p2p->pending_listen_freq);
3241 return;
3242 }
3243
3244 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3245 p2p->pending_listen_sec, p2p->pending_listen_usec,
3246 p2p->pending_listen_freq);
3247 p2p->in_listen = 1;
3248 p2p->drv_in_listen = freq;
3249 if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3250 /*
3251 * Add 20 msec extra wait to avoid race condition with driver
3252 * remain-on-channel end event, i.e., give driver more time to
3253 * complete the operation before our timeout expires.
3254 */
3255 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3256 p2p->pending_listen_usec + 20000);
3257 }
3258
3259 p2p->pending_listen_freq = 0;
3260 }
3261
3262
3263 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3264 {
3265 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3266 p2p->drv_in_listen = 0;
3267 if (p2p->in_listen)
3268 return 0; /* Internal timeout will trigger the next step */
3269
3270 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3271 if (p2p->go_neg_peer->connect_reqs >= 120) {
3272 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3273 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3274 return 0;
3275 }
3276
3277 p2p_set_state(p2p, P2P_CONNECT);
3278 p2p_connect_send(p2p, p2p->go_neg_peer);
3279 return 1;
3280 } else if (p2p->state == P2P_SEARCH) {
3281 if (p2p->p2p_scan_running) {
3282 /*
3283 * Search is already in progress. This can happen if
3284 * an Action frame RX is reported immediately after
3285 * the end of a remain-on-channel operation and the
3286 * response frame to that is sent using an offchannel
3287 * operation while in p2p_find. Avoid an attempt to
3288 * restart a scan here.
3289 */
3290 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3291 return 1;
3292 }
3293 if (p2p->pending_listen_freq) {
3294 /*
3295 * Better wait a bit if the driver is unable to start
3296 * offchannel operation for some reason. p2p_search()
3297 * will be started from internal timeout.
3298 */
3299 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3300 p2p_set_timeout(p2p, 0, 100000);
3301 return 1;
3302 }
3303 if (p2p->search_delay) {
3304 p2p_dbg(p2p, "Delay search operation by %u ms",
3305 p2p->search_delay);
3306 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3307 (p2p->search_delay % 1000) * 1000);
3308 return 1;
3309 }
3310 p2p_search(p2p);
3311 return 1;
3312 }
3313
3314 return 0;
3315 }
3316
3317
3318 static void p2p_timeout_connect(struct p2p_data *p2p)
3319 {
3320 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3321 if (p2p->go_neg_peer &&
3322 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3323 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3324 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3325 return;
3326 }
3327 if (p2p->go_neg_peer &&
3328 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3329 p2p->go_neg_peer->connect_reqs < 120) {
3330 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3331 p2p_connect_send(p2p, p2p->go_neg_peer);
3332 return;
3333 }
3334 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3335 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3336 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3337 p2p_set_timeout(p2p, 0, 30000);
3338 return;
3339 }
3340 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3341 p2p_listen_in_find(p2p, 0);
3342 }
3343
3344
3345 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3346 {
3347 if (p2p->go_neg_peer) {
3348 if (p2p->drv_in_listen) {
3349 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3350 return;
3351 }
3352
3353 if (p2p->go_neg_peer->connect_reqs >= 120) {
3354 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3355 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3356 return;
3357 }
3358
3359 p2p_set_state(p2p, P2P_CONNECT);
3360 p2p_connect_send(p2p, p2p->go_neg_peer);
3361 } else
3362 p2p_set_state(p2p, P2P_IDLE);
3363 }
3364
3365
3366 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3367 {
3368 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3369
3370 if (p2p->cfg->is_concurrent_session_active &&
3371 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3372 p2p_set_timeout(p2p, 0, 500000);
3373 else
3374 p2p_set_timeout(p2p, 0, 200000);
3375 }
3376
3377
3378 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3379 {
3380 struct p2p_device *dev = p2p->go_neg_peer;
3381 struct os_reltime now;
3382
3383 if (dev == NULL) {
3384 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3385 return;
3386 }
3387
3388 os_get_reltime(&now);
3389 if (os_reltime_expired(&now, &dev->go_neg_wait_started, 120)) {
3390 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation");
3391 p2p_go_neg_failed(p2p, dev, -1);
3392 return;
3393 }
3394
3395 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3396 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3397 p2p_listen_in_find(p2p, 0);
3398 }
3399
3400
3401 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3402 {
3403 p2p_dbg(p2p, "Service Discovery Query timeout");
3404 if (p2p->sd_peer) {
3405 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3406 p2p->sd_peer = NULL;
3407 }
3408 p2p_continue_find(p2p);
3409 }
3410
3411
3412 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3413 {
3414 p2p_dbg(p2p, "Provision Discovery Request timeout");
3415 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3416 p2p_continue_find(p2p);
3417 }
3418
3419
3420 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3421 {
3422 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3423
3424 /*
3425 * For user initiated PD requests that we have not gotten any responses
3426 * for while in IDLE state, we retry them a couple of times before
3427 * giving up.
3428 */
3429 if (!p2p->user_initiated_pd)
3430 return;
3431
3432 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3433
3434 if (p2p->pd_retries) {
3435 p2p->pd_retries--;
3436 p2p_retry_pd(p2p);
3437 } else {
3438 struct p2p_device *dev;
3439 int for_join = 0;
3440
3441 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3442 if (os_memcmp(p2p->pending_pd_devaddr,
3443 dev->info.p2p_device_addr, ETH_ALEN) != 0)
3444 continue;
3445 if (dev->req_config_methods &&
3446 (dev->flags & P2P_DEV_PD_FOR_JOIN))
3447 for_join = 1;
3448 }
3449
3450 if (p2p->cfg->prov_disc_fail)
3451 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3452 p2p->pending_pd_devaddr,
3453 for_join ?
3454 P2P_PROV_DISC_TIMEOUT_JOIN :
3455 P2P_PROV_DISC_TIMEOUT);
3456 p2p_reset_pending_pd(p2p);
3457 }
3458 }
3459
3460
3461 static void p2p_timeout_invite(struct p2p_data *p2p)
3462 {
3463 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3464 p2p_set_state(p2p, P2P_INVITE_LISTEN);
3465 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3466 /*
3467 * Better remain on operating channel instead of listen channel
3468 * when running a group.
3469 */
3470 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3471 p2p_set_timeout(p2p, 0, 100000);
3472 return;
3473 }
3474 p2p_listen_in_find(p2p, 0);
3475 }
3476
3477
3478 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3479 {
3480 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3481 p2p_set_state(p2p, P2P_INVITE);
3482 p2p_invite_send(p2p, p2p->invite_peer,
3483 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3484 } else {
3485 if (p2p->invite_peer) {
3486 p2p_dbg(p2p, "Invitation Request retry limit reached");
3487 if (p2p->cfg->invitation_result)
3488 p2p->cfg->invitation_result(
3489 p2p->cfg->cb_ctx, -1, NULL, NULL,
3490 p2p->invite_peer->info.p2p_device_addr,
3491 0, 0);
3492 }
3493 p2p_set_state(p2p, P2P_IDLE);
3494 }
3495 }
3496
3497
3498 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3499 {
3500 struct p2p_data *p2p = eloop_ctx;
3501
3502 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3503
3504 p2p->in_listen = 0;
3505
3506 switch (p2p->state) {
3507 case P2P_IDLE:
3508 /* Check if we timed out waiting for PD req */
3509 if (p2p->pending_action_state == P2P_PENDING_PD)
3510 p2p_timeout_prov_disc_req(p2p);
3511 break;
3512 case P2P_SEARCH:
3513 /* Check if we timed out waiting for PD req */
3514 if (p2p->pending_action_state == P2P_PENDING_PD)
3515 p2p_timeout_prov_disc_req(p2p);
3516 if (p2p->search_delay && !p2p->in_search_delay) {
3517 p2p_dbg(p2p, "Delay search operation by %u ms",
3518 p2p->search_delay);
3519 p2p->in_search_delay = 1;
3520 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3521 (p2p->search_delay % 1000) * 1000);
3522 break;
3523 }
3524 p2p->in_search_delay = 0;
3525 p2p_search(p2p);
3526 break;
3527 case P2P_CONNECT:
3528 p2p_timeout_connect(p2p);
3529 break;
3530 case P2P_CONNECT_LISTEN:
3531 p2p_timeout_connect_listen(p2p);
3532 break;
3533 case P2P_GO_NEG:
3534 break;
3535 case P2P_LISTEN_ONLY:
3536 /* Check if we timed out waiting for PD req */
3537 if (p2p->pending_action_state == P2P_PENDING_PD)
3538 p2p_timeout_prov_disc_req(p2p);
3539
3540 if (p2p->ext_listen_only) {
3541 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3542 p2p->ext_listen_only = 0;
3543 p2p_set_state(p2p, P2P_IDLE);
3544 }
3545 break;
3546 case P2P_WAIT_PEER_CONNECT:
3547 p2p_timeout_wait_peer_connect(p2p);
3548 break;
3549 case P2P_WAIT_PEER_IDLE:
3550 p2p_timeout_wait_peer_idle(p2p);
3551 break;
3552 case P2P_SD_DURING_FIND:
3553 p2p_timeout_sd_during_find(p2p);
3554 break;
3555 case P2P_PROVISIONING:
3556 break;
3557 case P2P_PD_DURING_FIND:
3558 p2p_timeout_prov_disc_during_find(p2p);
3559 break;
3560 case P2P_INVITE:
3561 p2p_timeout_invite(p2p);
3562 break;
3563 case P2P_INVITE_LISTEN:
3564 p2p_timeout_invite_listen(p2p);
3565 break;
3566 }
3567 }
3568
3569
3570 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3571 {
3572 struct p2p_device *dev;
3573
3574 dev = p2p_get_device(p2p, peer_addr);
3575 p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3576 MACSTR, MAC2STR(peer_addr));
3577 if (dev == NULL) {
3578 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3579 return -1;
3580 }
3581 dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3582 dev->flags |= P2P_DEV_USER_REJECTED;
3583 return 0;
3584 }
3585
3586
3587 const char * p2p_wps_method_text(enum p2p_wps_method method)
3588 {
3589 switch (method) {
3590 case WPS_NOT_READY:
3591 return "not-ready";
3592 case WPS_PIN_DISPLAY:
3593 return "Display";
3594 case WPS_PIN_KEYPAD:
3595 return "Keypad";
3596 case WPS_PBC:
3597 return "PBC";
3598 case WPS_NFC:
3599 return "NFC";
3600 }
3601
3602 return "??";
3603 }
3604
3605
3606 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3607 {
3608 switch (go_state) {
3609 case UNKNOWN_GO:
3610 return "unknown";
3611 case LOCAL_GO:
3612 return "local";
3613 case REMOTE_GO:
3614 return "remote";
3615 }
3616
3617 return "??";
3618 }
3619
3620
3621 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3622 const u8 *addr, int next)
3623 {
3624 struct p2p_device *dev;
3625
3626 if (addr)
3627 dev = p2p_get_device(p2p, addr);
3628 else
3629 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3630
3631 if (dev && next) {
3632 dev = dl_list_first(&dev->list, struct p2p_device, list);
3633 if (&dev->list == &p2p->devices)
3634 dev = NULL;
3635 }
3636
3637 if (dev == NULL)
3638 return NULL;
3639
3640 return &dev->info;
3641 }
3642
3643
3644 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3645 char *buf, size_t buflen)
3646 {
3647 struct p2p_device *dev;
3648 int res;
3649 char *pos, *end;
3650 struct os_reltime now;
3651
3652 if (info == NULL)
3653 return -1;
3654
3655 dev = (struct p2p_device *) (((u8 *) info) -
3656 offsetof(struct p2p_device, info));
3657
3658 pos = buf;
3659 end = buf + buflen;
3660
3661 os_get_reltime(&now);
3662 res = os_snprintf(pos, end - pos,
3663 "age=%d\n"
3664 "listen_freq=%d\n"
3665 "wps_method=%s\n"
3666 "interface_addr=" MACSTR "\n"
3667 "member_in_go_dev=" MACSTR "\n"
3668 "member_in_go_iface=" MACSTR "\n"
3669 "go_neg_req_sent=%d\n"
3670 "go_state=%s\n"
3671 "dialog_token=%u\n"
3672 "intended_addr=" MACSTR "\n"
3673 "country=%c%c\n"
3674 "oper_freq=%d\n"
3675 "req_config_methods=0x%x\n"
3676 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3677 "status=%d\n"
3678 "invitation_reqs=%u\n",
3679 (int) (now.sec - dev->last_seen.sec),
3680 dev->listen_freq,
3681 p2p_wps_method_text(dev->wps_method),
3682 MAC2STR(dev->interface_addr),
3683 MAC2STR(dev->member_in_go_dev),
3684 MAC2STR(dev->member_in_go_iface),
3685 dev->go_neg_req_sent,
3686 p2p_go_state_text(dev->go_state),
3687 dev->dialog_token,
3688 MAC2STR(dev->intended_addr),
3689 dev->country[0] ? dev->country[0] : '_',
3690 dev->country[1] ? dev->country[1] : '_',
3691 dev->oper_freq,
3692 dev->req_config_methods,
3693 dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3694 "[PROBE_REQ_ONLY]" : "",
3695 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3696 dev->flags & P2P_DEV_NOT_YET_READY ?
3697 "[NOT_YET_READY]" : "",
3698 dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3699 "[PD_PEER_DISPLAY]" : "",
3700 dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3701 "[PD_PEER_KEYPAD]" : "",
3702 dev->flags & P2P_DEV_USER_REJECTED ?
3703 "[USER_REJECTED]" : "",
3704 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3705 "[PEER_WAITING_RESPONSE]" : "",
3706 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3707 "[PREFER_PERSISTENT_GROUP]" : "",
3708 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3709 "[WAIT_GO_NEG_RESPONSE]" : "",
3710 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3711 "[WAIT_GO_NEG_CONFIRM]" : "",
3712 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3713 "[GROUP_CLIENT_ONLY]" : "",
3714 dev->flags & P2P_DEV_FORCE_FREQ ?
3715 "[FORCE_FREQ]" : "",
3716 dev->flags & P2P_DEV_PD_FOR_JOIN ?
3717 "[PD_FOR_JOIN]" : "",
3718 dev->status,
3719 dev->invitation_reqs);
3720 if (res < 0 || res >= end - pos)
3721 return pos - buf;
3722 pos += res;
3723
3724 if (dev->ext_listen_period) {
3725 res = os_snprintf(pos, end - pos,
3726 "ext_listen_period=%u\n"
3727 "ext_listen_interval=%u\n",
3728 dev->ext_listen_period,
3729 dev->ext_listen_interval);
3730 if (res < 0 || res >= end - pos)
3731 return pos - buf;
3732 pos += res;
3733 }
3734
3735 if (dev->oper_ssid_len) {
3736 res = os_snprintf(pos, end - pos,
3737 "oper_ssid=%s\n",
3738 wpa_ssid_txt(dev->oper_ssid,
3739 dev->oper_ssid_len));
3740 if (res < 0 || res >= end - pos)
3741 return pos - buf;
3742 pos += res;
3743 }
3744
3745 #ifdef CONFIG_WIFI_DISPLAY
3746 if (dev->info.wfd_subelems) {
3747 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3748 if (res < 0 || res >= end - pos)
3749 return pos - buf;
3750 pos += res;
3751
3752 pos += wpa_snprintf_hex(pos, end - pos,
3753 wpabuf_head(dev->info.wfd_subelems),
3754 wpabuf_len(dev->info.wfd_subelems));
3755
3756 res = os_snprintf(pos, end - pos, "\n");
3757 if (res < 0 || res >= end - pos)
3758 return pos - buf;
3759 pos += res;
3760 }
3761 #endif /* CONFIG_WIFI_DISPLAY */
3762
3763 return pos - buf;
3764 }
3765
3766
3767 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3768 {
3769 return p2p_get_device(p2p, addr) != NULL;
3770 }
3771
3772
3773 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3774 {
3775 if (enabled) {
3776 p2p_dbg(p2p, "Client discoverability enabled");
3777 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3778 } else {
3779 p2p_dbg(p2p, "Client discoverability disabled");
3780 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3781 }
3782 }
3783
3784
3785 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3786 u32 duration2, u32 interval2)
3787 {
3788 struct wpabuf *req;
3789 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3790 u8 *len;
3791
3792 req = wpabuf_alloc(100);
3793 if (req == NULL)
3794 return NULL;
3795
3796 if (duration1 || interval1) {
3797 os_memset(&desc1, 0, sizeof(desc1));
3798 desc1.count_type = 1;
3799 desc1.duration = duration1;
3800 desc1.interval = interval1;
3801 ptr1 = &desc1;
3802
3803 if (duration2 || interval2) {
3804 os_memset(&desc2, 0, sizeof(desc2));
3805 desc2.count_type = 2;
3806 desc2.duration = duration2;
3807 desc2.interval = interval2;
3808 ptr2 = &desc2;
3809 }
3810 }
3811
3812 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3813 len = p2p_buf_add_ie_hdr(req);
3814 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3815 p2p_buf_update_ie_hdr(req, len);
3816
3817 return req;
3818 }
3819
3820
3821 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3822 const u8 *own_interface_addr, unsigned int freq,
3823 u32 duration1, u32 interval1, u32 duration2,
3824 u32 interval2)
3825 {
3826 struct wpabuf *req;
3827
3828 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
3829 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
3830 "dur2=%u int2=%u",
3831 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3832 freq, duration1, interval1, duration2, interval2);
3833
3834 req = p2p_build_presence_req(duration1, interval1, duration2,
3835 interval2);
3836 if (req == NULL)
3837 return -1;
3838
3839 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3840 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3841 go_interface_addr,
3842 wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3843 p2p_dbg(p2p, "Failed to send Action frame");
3844 }
3845 wpabuf_free(req);
3846
3847 return 0;
3848 }
3849
3850
3851 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3852 size_t noa_len, u8 dialog_token)
3853 {
3854 struct wpabuf *resp;
3855 u8 *len;
3856
3857 resp = wpabuf_alloc(100 + noa_len);
3858 if (resp == NULL)
3859 return NULL;
3860
3861 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3862 len = p2p_buf_add_ie_hdr(resp);
3863 p2p_buf_add_status(resp, status);
3864 if (noa) {
3865 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3866 wpabuf_put_le16(resp, noa_len);
3867 wpabuf_put_data(resp, noa, noa_len);
3868 } else
3869 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3870 p2p_buf_update_ie_hdr(resp, len);
3871
3872 return resp;
3873 }
3874
3875
3876 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3877 const u8 *sa, const u8 *data, size_t len,
3878 int rx_freq)
3879 {
3880 struct p2p_message msg;
3881 u8 status;
3882 struct wpabuf *resp;
3883 size_t g;
3884 struct p2p_group *group = NULL;
3885 int parsed = 0;
3886 u8 noa[50];
3887 int noa_len;
3888
3889 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
3890
3891 for (g = 0; g < p2p->num_groups; g++) {
3892 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3893 ETH_ALEN) == 0) {
3894 group = p2p->groups[g];
3895 break;
3896 }
3897 }
3898 if (group == NULL) {
3899 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
3900 MACSTR, MAC2STR(da));
3901 return;
3902 }
3903
3904 if (p2p_parse(data, len, &msg) < 0) {
3905 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
3906 status = P2P_SC_FAIL_INVALID_PARAMS;
3907 goto fail;
3908 }
3909 parsed = 1;
3910
3911 if (msg.noa == NULL) {
3912 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
3913 status = P2P_SC_FAIL_INVALID_PARAMS;
3914 goto fail;
3915 }
3916
3917 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3918
3919 fail:
3920 if (p2p->cfg->get_noa)
3921 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3922 sizeof(noa));
3923 else
3924 noa_len = -1;
3925 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3926 noa_len > 0 ? noa_len : 0,
3927 msg.dialog_token);
3928 if (parsed)
3929 p2p_parse_free(&msg);
3930 if (resp == NULL)
3931 return;
3932
3933 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3934 if (p2p_send_action(p2p, rx_freq, sa, da, da,
3935 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3936 p2p_dbg(p2p, "Failed to send Action frame");
3937 }
3938 wpabuf_free(resp);
3939 }
3940
3941
3942 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3943 const u8 *sa, const u8 *data, size_t len)
3944 {
3945 struct p2p_message msg;
3946
3947 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
3948
3949 if (p2p_parse(data, len, &msg) < 0) {
3950 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
3951 return;
3952 }
3953
3954 if (msg.status == NULL || msg.noa == NULL) {
3955 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
3956 p2p_parse_free(&msg);
3957 return;
3958 }
3959
3960 if (p2p->cfg->presence_resp) {
3961 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
3962 msg.noa, msg.noa_len);
3963 }
3964
3965 if (*msg.status) {
3966 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
3967 *msg.status);
3968 p2p_parse_free(&msg);
3969 return;
3970 }
3971
3972 p2p_dbg(p2p, "P2P Presence Request was accepted");
3973 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
3974 msg.noa, msg.noa_len);
3975 /* TODO: process NoA */
3976 p2p_parse_free(&msg);
3977 }
3978
3979
3980 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
3981 {
3982 struct p2p_data *p2p = eloop_ctx;
3983
3984 if (p2p->ext_listen_interval) {
3985 /* Schedule next extended listen timeout */
3986 eloop_register_timeout(p2p->ext_listen_interval_sec,
3987 p2p->ext_listen_interval_usec,
3988 p2p_ext_listen_timeout, p2p, NULL);
3989 }
3990
3991 if ((p2p->cfg->is_p2p_in_progress &&
3992 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
3993 (p2p->pending_action_state == P2P_PENDING_PD &&
3994 p2p->pd_retries > 0)) {
3995 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
3996 p2p_state_txt(p2p->state));
3997 return;
3998 }
3999
4000 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4001 /*
4002 * This should not really happen, but it looks like the Listen
4003 * command may fail is something else (e.g., a scan) was
4004 * running at an inconvenient time. As a workaround, allow new
4005 * Extended Listen operation to be started.
4006 */
4007 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4008 p2p->ext_listen_only = 0;
4009 p2p_set_state(p2p, P2P_IDLE);
4010 }
4011
4012 if (p2p->state != P2P_IDLE) {
4013 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4014 return;
4015 }
4016
4017 p2p_dbg(p2p, "Extended Listen timeout");
4018 p2p->ext_listen_only = 1;
4019 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4020 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4021 p2p->ext_listen_only = 0;
4022 }
4023 }
4024
4025
4026 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4027 unsigned int interval)
4028 {
4029 if (period > 65535 || interval > 65535 || period > interval ||
4030 (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4031 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4032 period, interval);
4033 return -1;
4034 }
4035
4036 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4037
4038 if (interval == 0) {
4039 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4040 p2p->ext_listen_period = 0;
4041 p2p->ext_listen_interval = 0;
4042 return 0;
4043 }
4044
4045 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4046 period, interval);
4047 p2p->ext_listen_period = period;
4048 p2p->ext_listen_interval = interval;
4049 p2p->ext_listen_interval_sec = interval / 1000;
4050 p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4051
4052 eloop_register_timeout(p2p->ext_listen_interval_sec,
4053 p2p->ext_listen_interval_usec,
4054 p2p_ext_listen_timeout, p2p, NULL);
4055
4056 return 0;
4057 }
4058
4059
4060 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4061 const u8 *ie, size_t ie_len)
4062 {
4063 struct p2p_message msg;
4064
4065 if (bssid == NULL || ie == NULL)
4066 return;
4067
4068 os_memset(&msg, 0, sizeof(msg));
4069 if (p2p_parse_ies(ie, ie_len, &msg))
4070 return;
4071 if (msg.minor_reason_code == NULL) {
4072 p2p_parse_free(&msg);
4073 return;
4074 }
4075
4076 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4077 " reason_code=%u minor_reason_code=%u",
4078 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4079
4080 p2p_parse_free(&msg);
4081 }
4082
4083
4084 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4085 const u8 *ie, size_t ie_len)
4086 {
4087 struct p2p_message msg;
4088
4089 if (bssid == NULL || ie == NULL)
4090 return;
4091
4092 os_memset(&msg, 0, sizeof(msg));
4093 if (p2p_parse_ies(ie, ie_len, &msg))
4094 return;
4095 if (msg.minor_reason_code == NULL) {
4096 p2p_parse_free(&msg);
4097 return;
4098 }
4099
4100 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4101 " reason_code=%u minor_reason_code=%u",
4102 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4103
4104 p2p_parse_free(&msg);
4105 }
4106
4107
4108 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4109 {
4110 if (enabled) {
4111 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4112 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4113 } else {
4114 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4115 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4116 }
4117 }
4118
4119
4120 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4121 u8 *op_channel)
4122 {
4123 return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4124 }
4125
4126
4127 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4128 u8 forced)
4129 {
4130 if (p2p_channel_to_freq(reg_class, channel) < 0)
4131 return -1;
4132
4133 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4134 reg_class, channel);
4135
4136 /*
4137 * Listen channel was set in configuration or set by control interface;
4138 * cannot override it.
4139 */
4140 if (p2p->cfg->channel_forced && forced == 0)
4141 return -1;
4142
4143 if (p2p->state == P2P_IDLE) {
4144 p2p->cfg->reg_class = reg_class;
4145 p2p->cfg->channel = channel;
4146 p2p->cfg->channel_forced = forced;
4147 } else {
4148 p2p_dbg(p2p, "Defer setting listen channel");
4149 p2p->pending_reg_class = reg_class;
4150 p2p->pending_channel = channel;
4151 p2p->pending_channel_forced = forced;
4152 }
4153
4154 return 0;
4155 }
4156
4157
4158 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4159 {
4160 return p2p->cfg->channel;
4161 }
4162
4163
4164 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4165 {
4166 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4167 if (postfix == NULL) {
4168 p2p->cfg->ssid_postfix_len = 0;
4169 return 0;
4170 }
4171 if (len > sizeof(p2p->cfg->ssid_postfix))
4172 return -1;
4173 os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4174 p2p->cfg->ssid_postfix_len = len;
4175 return 0;
4176 }
4177
4178
4179 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4180 int cfg_op_channel)
4181 {
4182 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4183 return -1;
4184
4185 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4186 op_reg_class, op_channel);
4187 p2p->cfg->op_reg_class = op_reg_class;
4188 p2p->cfg->op_channel = op_channel;
4189 p2p->cfg->cfg_op_channel = cfg_op_channel;
4190 return 0;
4191 }
4192
4193
4194 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4195 const struct p2p_channel *pref_chan)
4196 {
4197 struct p2p_channel *n;
4198
4199 if (pref_chan) {
4200 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4201 if (n == NULL)
4202 return -1;
4203 os_memcpy(n, pref_chan,
4204 num_pref_chan * sizeof(struct p2p_channel));
4205 } else
4206 n = NULL;
4207
4208 os_free(p2p->cfg->pref_chan);
4209 p2p->cfg->pref_chan = n;
4210 p2p->cfg->num_pref_chan = num_pref_chan;
4211
4212 return 0;
4213 }
4214
4215
4216 int p2p_set_no_go_freq(struct p2p_data *p2p,
4217 const struct wpa_freq_range_list *list)
4218 {
4219 struct wpa_freq_range *tmp;
4220
4221 if (list == NULL || list->num == 0) {
4222 os_free(p2p->no_go_freq.range);
4223 p2p->no_go_freq.range = NULL;
4224 p2p->no_go_freq.num = 0;
4225 return 0;
4226 }
4227
4228 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4229 if (tmp == NULL)
4230 return -1;
4231 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4232 os_free(p2p->no_go_freq.range);
4233 p2p->no_go_freq.range = tmp;
4234 p2p->no_go_freq.num = list->num;
4235 p2p_dbg(p2p, "Updated no GO chan list");
4236
4237 return 0;
4238 }
4239
4240
4241 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4242 u8 *iface_addr)
4243 {
4244 struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4245 if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4246 return -1;
4247 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4248 return 0;
4249 }
4250
4251
4252 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4253 u8 *dev_addr)
4254 {
4255 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4256 if (dev == NULL)
4257 return -1;
4258 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4259 return 0;
4260 }
4261
4262
4263 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4264 {
4265 os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4266 if (is_zero_ether_addr(p2p->peer_filter))
4267 p2p_dbg(p2p, "Disable peer filter");
4268 else
4269 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4270 MAC2STR(p2p->peer_filter));
4271 }
4272
4273
4274 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4275 {
4276 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4277 if (p2p->cross_connect == enabled)
4278 return;
4279 p2p->cross_connect = enabled;
4280 /* TODO: may need to tear down any action group where we are GO(?) */
4281 }
4282
4283
4284 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4285 {
4286 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4287 if (dev == NULL)
4288 return -1;
4289 if (dev->oper_freq <= 0)
4290 return -1;
4291 return dev->oper_freq;
4292 }
4293
4294
4295 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4296 {
4297 p2p_dbg(p2p, "Intra BSS distribution %s",
4298 enabled ? "enabled" : "disabled");
4299 p2p->cfg->p2p_intra_bss = enabled;
4300 }
4301
4302
4303 void p2p_update_channel_list(struct p2p_data *p2p,
4304 const struct p2p_channels *chan,
4305 const struct p2p_channels *cli_chan)
4306 {
4307 p2p_dbg(p2p, "Update channel list");
4308 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4309 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4310 os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4311 sizeof(struct p2p_channels));
4312 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4313 }
4314
4315
4316 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4317 const u8 *src, const u8 *bssid, const u8 *buf,
4318 size_t len, unsigned int wait_time)
4319 {
4320 if (p2p->p2p_scan_running) {
4321 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4322 if (p2p->after_scan_tx) {
4323 p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4324 os_free(p2p->after_scan_tx);
4325 }
4326 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4327 len);
4328 if (p2p->after_scan_tx == NULL)
4329 return -1;
4330 p2p->after_scan_tx->freq = freq;
4331 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4332 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4333 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4334 p2p->after_scan_tx->len = len;
4335 p2p->after_scan_tx->wait_time = wait_time;
4336 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4337 return 0;
4338 }
4339
4340 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4341 buf, len, wait_time);
4342 }
4343
4344
4345 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4346 int freq_overall)
4347 {
4348 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d",
4349 freq_24, freq_5, freq_overall);
4350 p2p->best_freq_24 = freq_24;
4351 p2p->best_freq_5 = freq_5;
4352 p2p->best_freq_overall = freq_overall;
4353 }
4354
4355
4356 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4357 {
4358 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4359 p2p->own_freq_preference = freq;
4360 }
4361
4362
4363 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4364 {
4365 if (p2p == NULL || p2p->go_neg_peer == NULL)
4366 return NULL;
4367 return p2p->go_neg_peer->info.p2p_device_addr;
4368 }
4369
4370
4371 const struct p2p_peer_info *
4372 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4373 {
4374 struct p2p_device *dev;
4375
4376 if (addr) {
4377 dev = p2p_get_device(p2p, addr);
4378 if (!dev)
4379 return NULL;
4380
4381 if (!next) {
4382 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4383 return NULL;
4384
4385 return &dev->info;
4386 } else {
4387 do {
4388 dev = dl_list_first(&dev->list,
4389 struct p2p_device,
4390 list);
4391 if (!dev || &dev->list == &p2p->devices)
4392 return NULL;
4393 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4394 }
4395 } else {
4396 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4397 if (!dev)
4398 return NULL;
4399 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4400 dev = dl_list_first(&dev->list,
4401 struct p2p_device,
4402 list);
4403 if (!dev || &dev->list == &p2p->devices)
4404 return NULL;
4405 }
4406 }
4407
4408 return &dev->info;
4409 }
4410
4411
4412 int p2p_in_progress(struct p2p_data *p2p)
4413 {
4414 if (p2p == NULL)
4415 return 0;
4416 if (p2p->state == P2P_SEARCH)
4417 return 2;
4418 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4419 }
4420
4421
4422 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4423 u8 client_timeout)
4424 {
4425 if (p2p) {
4426 p2p->go_timeout = go_timeout;
4427 p2p->client_timeout = client_timeout;
4428 }
4429 }
4430
4431
4432 #ifdef CONFIG_WIFI_DISPLAY
4433
4434 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4435 {
4436 size_t g;
4437 struct p2p_group *group;
4438
4439 for (g = 0; g < p2p->num_groups; g++) {
4440 group = p2p->groups[g];
4441 p2p_group_force_beacon_update_ies(group);
4442 }
4443 }
4444
4445
4446 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4447 {
4448 wpabuf_free(p2p->wfd_ie_beacon);
4449 p2p->wfd_ie_beacon = ie;
4450 p2p_update_wfd_ie_groups(p2p);
4451 return 0;
4452 }
4453
4454
4455 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4456 {
4457 wpabuf_free(p2p->wfd_ie_probe_req);
4458 p2p->wfd_ie_probe_req = ie;
4459 return 0;
4460 }
4461
4462
4463 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4464 {
4465 wpabuf_free(p2p->wfd_ie_probe_resp);
4466 p2p->wfd_ie_probe_resp = ie;
4467 p2p_update_wfd_ie_groups(p2p);
4468 return 0;
4469 }
4470
4471
4472 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4473 {
4474 wpabuf_free(p2p->wfd_ie_assoc_req);
4475 p2p->wfd_ie_assoc_req = ie;
4476 return 0;
4477 }
4478
4479
4480 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4481 {
4482 wpabuf_free(p2p->wfd_ie_invitation);
4483 p2p->wfd_ie_invitation = ie;
4484 return 0;
4485 }
4486
4487
4488 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4489 {
4490 wpabuf_free(p2p->wfd_ie_prov_disc_req);
4491 p2p->wfd_ie_prov_disc_req = ie;
4492 return 0;
4493 }
4494
4495
4496 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4497 {
4498 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4499 p2p->wfd_ie_prov_disc_resp = ie;
4500 return 0;
4501 }
4502
4503
4504 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4505 {
4506 wpabuf_free(p2p->wfd_ie_go_neg);
4507 p2p->wfd_ie_go_neg = ie;
4508 return 0;
4509 }
4510
4511
4512 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4513 {
4514 wpabuf_free(p2p->wfd_dev_info);
4515 if (elem) {
4516 p2p->wfd_dev_info = wpabuf_dup(elem);
4517 if (p2p->wfd_dev_info == NULL)
4518 return -1;
4519 } else
4520 p2p->wfd_dev_info = NULL;
4521
4522 return 0;
4523 }
4524
4525
4526 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4527 {
4528 wpabuf_free(p2p->wfd_assoc_bssid);
4529 if (elem) {
4530 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4531 if (p2p->wfd_assoc_bssid == NULL)
4532 return -1;
4533 } else
4534 p2p->wfd_assoc_bssid = NULL;
4535
4536 return 0;
4537 }
4538
4539
4540 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4541 const struct wpabuf *elem)
4542 {
4543 wpabuf_free(p2p->wfd_coupled_sink_info);
4544 if (elem) {
4545 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4546 if (p2p->wfd_coupled_sink_info == NULL)
4547 return -1;
4548 } else
4549 p2p->wfd_coupled_sink_info = NULL;
4550
4551 return 0;
4552 }
4553
4554 #endif /* CONFIG_WIFI_DISPLAY */
4555
4556
4557 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4558 int max_disc_tu)
4559 {
4560 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4561 return -1;
4562
4563 p2p->min_disc_int = min_disc_int;
4564 p2p->max_disc_int = max_disc_int;
4565 p2p->max_disc_tu = max_disc_tu;
4566 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4567 min_disc_int, max_disc_int, max_disc_tu);
4568
4569 return 0;
4570 }
4571
4572
4573 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4574 {
4575 va_list ap;
4576 char buf[500];
4577
4578 if (!p2p->cfg->debug_print)
4579 return;
4580
4581 va_start(ap, fmt);
4582 vsnprintf(buf, sizeof(buf), fmt, ap);
4583 buf[sizeof(buf) - 1] = '\0';
4584 va_end(ap);
4585 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4586 }
4587
4588
4589 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4590 {
4591 va_list ap;
4592 char buf[500];
4593
4594 if (!p2p->cfg->debug_print)
4595 return;
4596
4597 va_start(ap, fmt);
4598 vsnprintf(buf, sizeof(buf), fmt, ap);
4599 buf[sizeof(buf) - 1] = '\0';
4600 va_end(ap);
4601 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4602 }
4603
4604
4605 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4606 {
4607 va_list ap;
4608 char buf[500];
4609
4610 if (!p2p->cfg->debug_print)
4611 return;
4612
4613 va_start(ap, fmt);
4614 vsnprintf(buf, sizeof(buf), fmt, ap);
4615 buf[sizeof(buf) - 1] = '\0';
4616 va_end(ap);
4617 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4618 }
4619
4620
4621 void p2p_loop_on_known_peers(struct p2p_data *p2p,
4622 void (*peer_callback)(struct p2p_peer_info *peer,
4623 void *user_data),
4624 void *user_data)
4625 {
4626 struct p2p_device *dev, *n;
4627
4628 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
4629 peer_callback(&dev->info, user_data);
4630 }
4631 }
4632
4633
4634 #ifdef CONFIG_WPS_NFC
4635
4636 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
4637 int client_freq,
4638 const u8 *go_dev_addr,
4639 const u8 *ssid, size_t ssid_len)
4640 {
4641 struct wpabuf *buf;
4642 u8 op_class, channel;
4643 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
4644
4645 buf = wpabuf_alloc(1000);
4646 if (buf == NULL)
4647 return NULL;
4648
4649 op_class = p2p->cfg->reg_class;
4650 channel = p2p->cfg->channel;
4651
4652 p2p_buf_add_capability(buf, p2p->dev_capab &
4653 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
4654 p2p_buf_add_device_info(buf, p2p, NULL);
4655
4656 if (p2p->num_groups > 0) {
4657 int freq = p2p_group_get_freq(p2p->groups[0]);
4658 role = P2P_GO_IN_A_GROUP;
4659 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
4660 p2p_dbg(p2p,
4661 "Unknown GO operating frequency %d MHz for NFC handover",
4662 freq);
4663 wpabuf_free(buf);
4664 return NULL;
4665 }
4666 } else if (client_freq > 0) {
4667 role = P2P_CLIENT_IN_A_GROUP;
4668 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
4669 p2p_dbg(p2p,
4670 "Unknown client operating frequency %d MHz for NFC handover",
4671 client_freq);
4672 wpabuf_free(buf);
4673 return NULL;
4674 }
4675 }
4676
4677 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
4678 channel, role);
4679
4680 if (p2p->num_groups > 0) {
4681 /* Limit number of clients to avoid very long message */
4682 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
4683 p2p_group_buf_add_id(p2p->groups[0], buf);
4684 } else if (client_freq > 0 &&
4685 go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
4686 ssid && ssid_len > 0) {
4687 /*
4688 * Add the optional P2P Group ID to indicate in which group this
4689 * device is a P2P Client.
4690 */
4691 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
4692 }
4693
4694 return buf;
4695 }
4696
4697
4698 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
4699 int client_freq,
4700 const u8 *go_dev_addr,
4701 const u8 *ssid, size_t ssid_len)
4702 {
4703 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4704 ssid_len);
4705 }
4706
4707
4708 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
4709 int client_freq,
4710 const u8 *go_dev_addr,
4711 const u8 *ssid, size_t ssid_len)
4712 {
4713 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4714 ssid_len);
4715 }
4716
4717
4718 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
4719 struct p2p_nfc_params *params)
4720 {
4721 struct p2p_message msg;
4722 struct p2p_device *dev;
4723 const u8 *p2p_dev_addr;
4724 int freq;
4725 enum p2p_role_indication role;
4726
4727 params->next_step = NO_ACTION;
4728
4729 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
4730 params->p2p_attr, params->p2p_len, &msg)) {
4731 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
4732 p2p_parse_free(&msg);
4733 return -1;
4734 }
4735
4736 if (msg.p2p_device_addr)
4737 p2p_dev_addr = msg.p2p_device_addr;
4738 else if (msg.device_id)
4739 p2p_dev_addr = msg.device_id;
4740 else {
4741 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
4742 p2p_parse_free(&msg);
4743 return -1;
4744 }
4745
4746 if (msg.oob_dev_password) {
4747 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
4748 msg.oob_dev_password_len);
4749 params->oob_dev_pw_len = msg.oob_dev_password_len;
4750 }
4751
4752 dev = p2p_create_device(p2p, p2p_dev_addr);
4753 if (dev == NULL) {
4754 p2p_parse_free(&msg);
4755 return -1;
4756 }
4757
4758 params->peer = &dev->info;
4759
4760 os_get_reltime(&dev->last_seen);
4761 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
4762 p2p_copy_wps_info(p2p, dev, 0, &msg);
4763
4764 if (!msg.oob_go_neg_channel) {
4765 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
4766 return -1;
4767 }
4768
4769 if (msg.oob_go_neg_channel[3] == 0 &&
4770 msg.oob_go_neg_channel[4] == 0)
4771 freq = 0;
4772 else
4773 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
4774 msg.oob_go_neg_channel[4]);
4775 if (freq < 0) {
4776 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
4777 return -1;
4778 }
4779 role = msg.oob_go_neg_channel[5];
4780
4781 if (role == P2P_GO_IN_A_GROUP) {
4782 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
4783 params->go_freq = freq;
4784 } else if (role == P2P_CLIENT_IN_A_GROUP) {
4785 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
4786 freq);
4787 params->go_freq = freq;
4788 } else
4789 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
4790 dev->oob_go_neg_freq = freq;
4791
4792 if (!params->sel && role != P2P_GO_IN_A_GROUP) {
4793 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
4794 p2p->cfg->channel);
4795 if (freq < 0) {
4796 p2p_dbg(p2p, "Own listen channel not known");
4797 return -1;
4798 }
4799 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
4800 dev->oob_go_neg_freq = freq;
4801 }
4802
4803 if (msg.group_id) {
4804 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
4805 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
4806 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
4807 params->go_ssid_len);
4808 }
4809
4810 if (dev->flags & P2P_DEV_USER_REJECTED) {
4811 p2p_dbg(p2p, "Do not report rejected device");
4812 p2p_parse_free(&msg);
4813 return 0;
4814 }
4815
4816 if (!(dev->flags & P2P_DEV_REPORTED)) {
4817 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
4818 !(dev->flags & P2P_DEV_REPORTED_ONCE));
4819 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
4820 }
4821 p2p_parse_free(&msg);
4822
4823 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
4824 params->next_step = BOTH_GO;
4825 else if (role == P2P_GO_IN_A_GROUP)
4826 params->next_step = JOIN_GROUP;
4827 else if (role == P2P_CLIENT_IN_A_GROUP) {
4828 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
4829 params->next_step = PEER_CLIENT;
4830 } else if (p2p->num_groups > 0)
4831 params->next_step = AUTH_JOIN;
4832 else if (params->sel)
4833 params->next_step = INIT_GO_NEG;
4834 else
4835 params->next_step = RESP_GO_NEG;
4836
4837 return 0;
4838 }
4839
4840
4841 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
4842 int go_intent,
4843 const u8 *own_interface_addr)
4844 {
4845
4846 p2p->authorized_oob_dev_pw_id = dev_pw_id;
4847 if (dev_pw_id == 0) {
4848 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
4849 return;
4850 }
4851
4852 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
4853 dev_pw_id);
4854
4855 p2p->go_intent = go_intent;
4856 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
4857 }
4858
4859 #endif /* CONFIG_WPS_NFC */
4860
4861
4862 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
4863 {
4864 if (len < 8 || len > 63)
4865 return -1;
4866 p2p->cfg->passphrase_len = len;
4867 return 0;
4868 }
4869
4870
4871 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
4872 {
4873 p2p->vendor_elem = vendor_elem;
4874 }
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