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P2P NFC: Report connection handover as trigger for P2P
[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 "wps/wps_i.h"
16 #include "p2p_i.h"
17 #include "p2p.h"
18
19
20 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
21 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
22 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
23 const u8 *sa, const u8 *data, size_t len,
24 int rx_freq);
25 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
26 const u8 *sa, const u8 *data,
27 size_t len);
28 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
29 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
30
31
32 /*
33 * p2p_scan recovery timeout
34 *
35 * Many drivers are using 30 second timeout on scan results. Allow a bit larger
36 * timeout for this to avoid hitting P2P timeout unnecessarily.
37 */
38 #define P2P_SCAN_TIMEOUT 35
39
40 /**
41 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
42 * entries will be removed
43 */
44 #ifndef P2P_PEER_EXPIRATION_AGE
45 #define P2P_PEER_EXPIRATION_AGE 60
46 #endif /* P2P_PEER_EXPIRATION_AGE */
47
48 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
49
50 static void p2p_expire_peers(struct p2p_data *p2p)
51 {
52 struct p2p_device *dev, *n;
53 struct os_reltime now;
54 size_t i;
55
56 os_get_reltime(&now);
57 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
58 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
59 continue;
60
61 if (dev == p2p->go_neg_peer) {
62 /*
63 * GO Negotiation is in progress with the peer, so
64 * don't expire the peer entry until GO Negotiation
65 * fails or times out.
66 */
67 continue;
68 }
69
70 if (p2p->cfg->go_connected &&
71 p2p->cfg->go_connected(p2p->cfg->cb_ctx,
72 dev->info.p2p_device_addr)) {
73 /*
74 * We are connected as a client to a group in which the
75 * peer is the GO, so do not expire the peer entry.
76 */
77 os_get_reltime(&dev->last_seen);
78 continue;
79 }
80
81 for (i = 0; i < p2p->num_groups; i++) {
82 if (p2p_group_is_client_connected(
83 p2p->groups[i], dev->info.p2p_device_addr))
84 break;
85 }
86 if (i < p2p->num_groups) {
87 /*
88 * The peer is connected as a client in a group where
89 * we are the GO, so do not expire the peer entry.
90 */
91 os_get_reltime(&dev->last_seen);
92 continue;
93 }
94
95 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
96 MAC2STR(dev->info.p2p_device_addr));
97 dl_list_del(&dev->list);
98 p2p_device_free(p2p, dev);
99 }
100 }
101
102
103 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
104 {
105 struct p2p_data *p2p = eloop_ctx;
106 p2p_expire_peers(p2p);
107 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
108 p2p_expiration_timeout, p2p, NULL);
109 }
110
111
112 static const char * p2p_state_txt(int state)
113 {
114 switch (state) {
115 case P2P_IDLE:
116 return "IDLE";
117 case P2P_SEARCH:
118 return "SEARCH";
119 case P2P_CONNECT:
120 return "CONNECT";
121 case P2P_CONNECT_LISTEN:
122 return "CONNECT_LISTEN";
123 case P2P_GO_NEG:
124 return "GO_NEG";
125 case P2P_LISTEN_ONLY:
126 return "LISTEN_ONLY";
127 case P2P_WAIT_PEER_CONNECT:
128 return "WAIT_PEER_CONNECT";
129 case P2P_WAIT_PEER_IDLE:
130 return "WAIT_PEER_IDLE";
131 case P2P_SD_DURING_FIND:
132 return "SD_DURING_FIND";
133 case P2P_PROVISIONING:
134 return "PROVISIONING";
135 case P2P_PD_DURING_FIND:
136 return "PD_DURING_FIND";
137 case P2P_INVITE:
138 return "INVITE";
139 case P2P_INVITE_LISTEN:
140 return "INVITE_LISTEN";
141 default:
142 return "?";
143 }
144 }
145
146
147 const char * p2p_get_state_txt(struct p2p_data *p2p)
148 {
149 return p2p_state_txt(p2p->state);
150 }
151
152
153 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
154 {
155 struct p2p_device *dev = NULL;
156
157 if (!addr || !p2p)
158 return 0;
159
160 dev = p2p_get_device(p2p, addr);
161 if (dev)
162 return dev->wps_prov_info;
163 else
164 return 0;
165 }
166
167
168 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
169 {
170 struct p2p_device *dev = NULL;
171
172 if (!addr || !p2p)
173 return;
174
175 dev = p2p_get_device(p2p, addr);
176 if (dev)
177 dev->wps_prov_info = 0;
178 }
179
180
181 void p2p_set_state(struct p2p_data *p2p, int new_state)
182 {
183 p2p_dbg(p2p, "State %s -> %s",
184 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
185 p2p->state = new_state;
186 }
187
188
189 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
190 {
191 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
192 p2p_state_txt(p2p->state), sec, usec);
193 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
194 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
195 }
196
197
198 void p2p_clear_timeout(struct p2p_data *p2p)
199 {
200 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
201 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
202 }
203
204
205 void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer,
206 int status)
207 {
208 struct p2p_go_neg_results res;
209 p2p_clear_timeout(p2p);
210 p2p_set_state(p2p, P2P_IDLE);
211 if (p2p->go_neg_peer) {
212 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
213 p2p->go_neg_peer->wps_method = WPS_NOT_READY;
214 p2p->go_neg_peer->oob_pw_id = 0;
215 }
216 p2p->go_neg_peer = NULL;
217
218 os_memset(&res, 0, sizeof(res));
219 res.status = status;
220 if (peer) {
221 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr,
222 ETH_ALEN);
223 os_memcpy(res.peer_interface_addr, peer->intended_addr,
224 ETH_ALEN);
225 }
226 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
227 }
228
229
230 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
231 {
232 unsigned int r, tu;
233 int freq;
234 struct wpabuf *ies;
235
236 p2p_dbg(p2p, "Starting short listen state (state=%s)",
237 p2p_state_txt(p2p->state));
238
239 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
240 if (freq < 0) {
241 p2p_dbg(p2p, "Unknown regulatory class/channel");
242 return;
243 }
244
245 os_get_random((u8 *) &r, sizeof(r));
246 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
247 p2p->min_disc_int) * 100;
248 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
249 tu = p2p->max_disc_tu;
250 if (!dev_disc && tu < 100)
251 tu = 100; /* Need to wait in non-device discovery use cases */
252 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
253 tu = p2p->cfg->max_listen * 1000 / 1024;
254
255 if (tu == 0) {
256 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
257 p2p_set_timeout(p2p, 0, 0);
258 return;
259 }
260
261 p2p->pending_listen_freq = freq;
262 p2p->pending_listen_sec = 0;
263 p2p->pending_listen_usec = 1024 * tu;
264
265 ies = p2p_build_probe_resp_ies(p2p);
266 if (ies == NULL)
267 return;
268
269 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
270 ies) < 0) {
271 p2p_dbg(p2p, "Failed to start listen mode");
272 p2p->pending_listen_freq = 0;
273 }
274 wpabuf_free(ies);
275 }
276
277
278 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
279 {
280 int freq;
281 struct wpabuf *ies;
282
283 p2p_dbg(p2p, "Going to listen(only) state");
284
285 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
286 if (freq < 0) {
287 p2p_dbg(p2p, "Unknown regulatory class/channel");
288 return -1;
289 }
290
291 p2p->pending_listen_freq = freq;
292 p2p->pending_listen_sec = timeout / 1000;
293 p2p->pending_listen_usec = (timeout % 1000) * 1000;
294
295 if (p2p->p2p_scan_running) {
296 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
297 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
298 return 0;
299 }
300 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
301 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
302 return 0;
303 }
304
305 ies = p2p_build_probe_resp_ies(p2p);
306 if (ies == NULL)
307 return -1;
308
309 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
310 p2p_dbg(p2p, "Failed to start listen mode");
311 p2p->pending_listen_freq = 0;
312 wpabuf_free(ies);
313 return -1;
314 }
315 wpabuf_free(ies);
316
317 p2p_set_state(p2p, P2P_LISTEN_ONLY);
318
319 return 0;
320 }
321
322
323 static void p2p_device_clear_reported(struct p2p_data *p2p)
324 {
325 struct p2p_device *dev;
326 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list)
327 dev->flags &= ~P2P_DEV_REPORTED;
328 }
329
330
331 /**
332 * p2p_get_device - Fetch a peer entry
333 * @p2p: P2P module context from p2p_init()
334 * @addr: P2P Device Address of the peer
335 * Returns: Pointer to the device entry or %NULL if not found
336 */
337 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
338 {
339 struct p2p_device *dev;
340 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
341 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
342 return dev;
343 }
344 return NULL;
345 }
346
347
348 /**
349 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
350 * @p2p: P2P module context from p2p_init()
351 * @addr: P2P Interface Address of the peer
352 * Returns: Pointer to the device entry or %NULL if not found
353 */
354 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
355 const u8 *addr)
356 {
357 struct p2p_device *dev;
358 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
359 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
360 return dev;
361 }
362 return NULL;
363 }
364
365
366 /**
367 * p2p_create_device - Create a peer entry
368 * @p2p: P2P module context from p2p_init()
369 * @addr: P2P Device Address of the peer
370 * Returns: Pointer to the device entry or %NULL on failure
371 *
372 * If there is already an entry for the peer, it will be returned instead of
373 * creating a new one.
374 */
375 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
376 const u8 *addr)
377 {
378 struct p2p_device *dev, *oldest = NULL;
379 size_t count = 0;
380
381 dev = p2p_get_device(p2p, addr);
382 if (dev)
383 return dev;
384
385 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
386 count++;
387 if (oldest == NULL ||
388 os_reltime_before(&dev->last_seen, &oldest->last_seen))
389 oldest = dev;
390 }
391 if (count + 1 > p2p->cfg->max_peers && oldest) {
392 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
393 dl_list_del(&oldest->list);
394 p2p_device_free(p2p, oldest);
395 }
396
397 dev = os_zalloc(sizeof(*dev));
398 if (dev == NULL)
399 return NULL;
400 dl_list_add(&p2p->devices, &dev->list);
401 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
402
403 return dev;
404 }
405
406
407 static void p2p_copy_client_info(struct p2p_device *dev,
408 struct p2p_client_info *cli)
409 {
410 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
411 dev->info.device_name[cli->dev_name_len] = '\0';
412 dev->info.dev_capab = cli->dev_capab;
413 dev->info.config_methods = cli->config_methods;
414 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
415 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
416 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
417 dev->info.wps_sec_dev_type_list_len);
418 }
419
420
421 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
422 const u8 *go_interface_addr, int freq,
423 const u8 *gi, size_t gi_len)
424 {
425 struct p2p_group_info info;
426 size_t c;
427 struct p2p_device *dev;
428
429 if (gi == NULL)
430 return 0;
431
432 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
433 return -1;
434
435 /*
436 * Clear old data for this group; if the devices are still in the
437 * group, the information will be restored in the loop following this.
438 */
439 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
440 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
441 ETH_ALEN) == 0) {
442 os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
443 os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
444 }
445 }
446
447 for (c = 0; c < info.num_clients; c++) {
448 struct p2p_client_info *cli = &info.client[c];
449 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
450 ETH_ALEN) == 0)
451 continue; /* ignore our own entry */
452 dev = p2p_get_device(p2p, cli->p2p_device_addr);
453 if (dev) {
454 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
455 P2P_DEV_PROBE_REQ_ONLY)) {
456 /*
457 * Update information since we have not
458 * received this directly from the client.
459 */
460 p2p_copy_client_info(dev, cli);
461 } else {
462 /*
463 * Need to update P2P Client Discoverability
464 * flag since it is valid only in P2P Group
465 * Info attribute.
466 */
467 dev->info.dev_capab &=
468 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
469 dev->info.dev_capab |=
470 cli->dev_capab &
471 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
472 }
473 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
474 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
475 }
476 } else {
477 dev = p2p_create_device(p2p, cli->p2p_device_addr);
478 if (dev == NULL)
479 continue;
480 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
481 p2p_copy_client_info(dev, cli);
482 dev->oper_freq = freq;
483 p2p->cfg->dev_found(p2p->cfg->cb_ctx,
484 dev->info.p2p_device_addr,
485 &dev->info, 1);
486 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
487 }
488
489 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
490 ETH_ALEN);
491 os_get_reltime(&dev->last_seen);
492 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
493 os_memcpy(dev->member_in_go_iface, go_interface_addr,
494 ETH_ALEN);
495 }
496
497 return 0;
498 }
499
500
501 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
502 int probe_req, const struct p2p_message *msg)
503 {
504 os_memcpy(dev->info.device_name, msg->device_name,
505 sizeof(dev->info.device_name));
506
507 if (msg->manufacturer &&
508 msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
509 os_memset(dev->info.manufacturer, 0,
510 sizeof(dev->info.manufacturer));
511 os_memcpy(dev->info.manufacturer, msg->manufacturer,
512 msg->manufacturer_len);
513 }
514
515 if (msg->model_name &&
516 msg->model_name_len < sizeof(dev->info.model_name)) {
517 os_memset(dev->info.model_name, 0,
518 sizeof(dev->info.model_name));
519 os_memcpy(dev->info.model_name, msg->model_name,
520 msg->model_name_len);
521 }
522
523 if (msg->model_number &&
524 msg->model_number_len < sizeof(dev->info.model_number)) {
525 os_memset(dev->info.model_number, 0,
526 sizeof(dev->info.model_number));
527 os_memcpy(dev->info.model_number, msg->model_number,
528 msg->model_number_len);
529 }
530
531 if (msg->serial_number &&
532 msg->serial_number_len < sizeof(dev->info.serial_number)) {
533 os_memset(dev->info.serial_number, 0,
534 sizeof(dev->info.serial_number));
535 os_memcpy(dev->info.serial_number, msg->serial_number,
536 msg->serial_number_len);
537 }
538
539 if (msg->pri_dev_type)
540 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
541 sizeof(dev->info.pri_dev_type));
542 else if (msg->wps_pri_dev_type)
543 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
544 sizeof(dev->info.pri_dev_type));
545
546 if (msg->wps_sec_dev_type_list) {
547 os_memcpy(dev->info.wps_sec_dev_type_list,
548 msg->wps_sec_dev_type_list,
549 msg->wps_sec_dev_type_list_len);
550 dev->info.wps_sec_dev_type_list_len =
551 msg->wps_sec_dev_type_list_len;
552 }
553
554 if (msg->capability) {
555 /*
556 * P2P Client Discoverability bit is reserved in all frames
557 * that use this function, so do not change its value here.
558 */
559 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
560 dev->info.dev_capab |= msg->capability[0] &
561 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
562 dev->info.group_capab = msg->capability[1];
563 }
564
565 if (msg->ext_listen_timing) {
566 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
567 dev->ext_listen_interval =
568 WPA_GET_LE16(msg->ext_listen_timing + 2);
569 }
570
571 if (!probe_req) {
572 u16 new_config_methods;
573 new_config_methods = msg->config_methods ?
574 msg->config_methods : msg->wps_config_methods;
575 if (new_config_methods &&
576 dev->info.config_methods != new_config_methods) {
577 p2p_dbg(p2p, "Update peer " MACSTR
578 " config_methods 0x%x -> 0x%x",
579 MAC2STR(dev->info.p2p_device_addr),
580 dev->info.config_methods,
581 new_config_methods);
582 dev->info.config_methods = new_config_methods;
583 }
584 }
585 }
586
587
588 /**
589 * p2p_add_device - Add peer entries based on scan results or P2P frames
590 * @p2p: P2P module context from p2p_init()
591 * @addr: Source address of Beacon or Probe Response frame (may be either
592 * P2P Device Address or P2P Interface Address)
593 * @level: Signal level (signal strength of the received frame from the peer)
594 * @freq: Frequency on which the Beacon or Probe Response frame was received
595 * @rx_time: Time when the result was received
596 * @ies: IEs from the Beacon or Probe Response frame
597 * @ies_len: Length of ies buffer in octets
598 * @scan_res: Whether this was based on scan results
599 * Returns: 0 on success, -1 on failure
600 *
601 * If the scan result is for a GO, the clients in the group will also be added
602 * to the peer table. This function can also be used with some other frames
603 * like Provision Discovery Request that contains P2P Capability and P2P Device
604 * Info attributes.
605 */
606 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
607 struct os_reltime *rx_time, int level, const u8 *ies,
608 size_t ies_len, int scan_res)
609 {
610 struct p2p_device *dev;
611 struct p2p_message msg;
612 const u8 *p2p_dev_addr;
613 int i;
614 struct os_reltime time_now;
615
616 os_memset(&msg, 0, sizeof(msg));
617 if (p2p_parse_ies(ies, ies_len, &msg)) {
618 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
619 p2p_parse_free(&msg);
620 return -1;
621 }
622
623 if (msg.p2p_device_addr)
624 p2p_dev_addr = msg.p2p_device_addr;
625 else if (msg.device_id)
626 p2p_dev_addr = msg.device_id;
627 else {
628 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
629 p2p_parse_free(&msg);
630 return -1;
631 }
632
633 if (!is_zero_ether_addr(p2p->peer_filter) &&
634 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
635 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
636 " due to peer filter", MAC2STR(p2p_dev_addr));
637 p2p_parse_free(&msg);
638 return 0;
639 }
640
641 dev = p2p_create_device(p2p, p2p_dev_addr);
642 if (dev == NULL) {
643 p2p_parse_free(&msg);
644 return -1;
645 }
646
647 if (rx_time == NULL) {
648 os_get_reltime(&time_now);
649 rx_time = &time_now;
650 }
651
652 /*
653 * Update the device entry only if the new peer
654 * entry is newer than the one previously stored.
655 */
656 if (dev->last_seen.sec > 0 &&
657 os_reltime_before(rx_time, &dev->last_seen)) {
658 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
659 (unsigned int) rx_time->sec,
660 (unsigned int) rx_time->usec,
661 (unsigned int) dev->last_seen.sec,
662 (unsigned int) dev->last_seen.usec);
663 p2p_parse_free(&msg);
664 return -1;
665 }
666
667 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
668
669 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
670
671 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
672 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
673 if (msg.ssid &&
674 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
675 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
676 != 0)) {
677 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
678 dev->oper_ssid_len = msg.ssid[1];
679 }
680
681 if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
682 *msg.ds_params >= 1 && *msg.ds_params <= 14) {
683 int ds_freq;
684 if (*msg.ds_params == 14)
685 ds_freq = 2484;
686 else
687 ds_freq = 2407 + *msg.ds_params * 5;
688 if (freq != ds_freq) {
689 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
690 freq, ds_freq);
691 freq = ds_freq;
692 }
693 }
694
695 if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
696 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
697 MACSTR " %d -> %d MHz (DS param %d)",
698 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
699 freq, msg.ds_params ? *msg.ds_params : -1);
700 }
701 if (scan_res) {
702 dev->listen_freq = freq;
703 if (msg.group_info)
704 dev->oper_freq = freq;
705 }
706 dev->info.level = level;
707
708 p2p_copy_wps_info(p2p, dev, 0, &msg);
709
710 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
711 wpabuf_free(dev->info.wps_vendor_ext[i]);
712 dev->info.wps_vendor_ext[i] = NULL;
713 }
714
715 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
716 if (msg.wps_vendor_ext[i] == NULL)
717 break;
718 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
719 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
720 if (dev->info.wps_vendor_ext[i] == NULL)
721 break;
722 }
723
724 if (msg.wfd_subelems) {
725 wpabuf_free(dev->info.wfd_subelems);
726 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
727 }
728
729 if (scan_res) {
730 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
731 msg.group_info, msg.group_info_len);
732 }
733
734 p2p_parse_free(&msg);
735
736 if (p2p_pending_sd_req(p2p, dev))
737 dev->flags |= P2P_DEV_SD_SCHEDULE;
738
739 if (dev->flags & P2P_DEV_REPORTED)
740 return 0;
741
742 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
743 freq, (unsigned int) rx_time->sec,
744 (unsigned int) rx_time->usec);
745 if (dev->flags & P2P_DEV_USER_REJECTED) {
746 p2p_dbg(p2p, "Do not report rejected device");
747 return 0;
748 }
749
750 if (dev->info.config_methods == 0 &&
751 (freq == 2412 || freq == 2437 || freq == 2462)) {
752 /*
753 * If we have only seen a Beacon frame from a GO, we do not yet
754 * know what WPS config methods it supports. Since some
755 * applications use config_methods value from P2P-DEVICE-FOUND
756 * events, postpone reporting this peer until we've fully
757 * discovered its capabilities.
758 *
759 * At least for now, do this only if the peer was detected on
760 * one of the social channels since that peer can be easily be
761 * found again and there are no limitations of having to use
762 * passive scan on this channels, so this can be done through
763 * Probe Response frame that includes the config_methods
764 * information.
765 */
766 p2p_dbg(p2p, "Do not report peer " MACSTR
767 " with unknown config methods", MAC2STR(addr));
768 return 0;
769 }
770
771 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
772 !(dev->flags & P2P_DEV_REPORTED_ONCE));
773 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
774
775 return 0;
776 }
777
778
779 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
780 {
781 int i;
782
783 if (p2p->go_neg_peer == dev) {
784 /*
785 * If GO Negotiation is in progress, report that it has failed.
786 */
787 p2p_go_neg_failed(p2p, dev, -1);
788 p2p->go_neg_peer = NULL;
789 }
790 if (p2p->invite_peer == dev)
791 p2p->invite_peer = NULL;
792 if (p2p->sd_peer == dev)
793 p2p->sd_peer = NULL;
794 if (p2p->pending_client_disc_go == dev)
795 p2p->pending_client_disc_go = NULL;
796
797 /* dev_lost() device, but only if it was previously dev_found() */
798 if (dev->flags & P2P_DEV_REPORTED_ONCE)
799 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
800 dev->info.p2p_device_addr);
801
802 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
803 wpabuf_free(dev->info.wps_vendor_ext[i]);
804 dev->info.wps_vendor_ext[i] = NULL;
805 }
806
807 wpabuf_free(dev->info.wfd_subelems);
808
809 os_free(dev);
810 }
811
812
813 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
814 {
815 struct p2p_channels *c;
816 struct p2p_reg_class *cla;
817 size_t cl, ch;
818 int found = 0;
819 u8 reg_class;
820 u8 channel;
821 int freq;
822
823 c = &p2p->cfg->channels;
824 for (cl = 0; cl < c->reg_classes; cl++) {
825 cla = &c->reg_class[cl];
826 if (cla->reg_class != p2p->last_prog_scan_class)
827 continue;
828 for (ch = 0; ch < cla->channels; ch++) {
829 if (cla->channel[ch] == p2p->last_prog_scan_chan) {
830 found = 1;
831 break;
832 }
833 }
834 if (found)
835 break;
836 }
837
838 if (!found) {
839 /* Start from beginning */
840 reg_class = c->reg_class[0].reg_class;
841 channel = c->reg_class[0].channel[0];
842 } else {
843 /* Pick the next channel */
844 ch++;
845 if (ch == cla->channels) {
846 cl++;
847 if (cl == c->reg_classes)
848 cl = 0;
849 ch = 0;
850 }
851 reg_class = c->reg_class[cl].reg_class;
852 channel = c->reg_class[cl].channel[ch];
853 }
854
855 freq = p2p_channel_to_freq(reg_class, channel);
856 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
857 reg_class, channel, freq);
858 p2p->last_prog_scan_class = reg_class;
859 p2p->last_prog_scan_chan = channel;
860
861 if (freq == 2412 || freq == 2437 || freq == 2462)
862 return 0; /* No need to add social channels */
863 return freq;
864 }
865
866
867 static void p2p_search(struct p2p_data *p2p)
868 {
869 int freq = 0;
870 enum p2p_scan_type type;
871 u16 pw_id = DEV_PW_DEFAULT;
872 int res;
873
874 if (p2p->drv_in_listen) {
875 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
876 return;
877 }
878 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
879
880 if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
881 (freq = p2p_get_next_prog_freq(p2p)) > 0) {
882 type = P2P_SCAN_SOCIAL_PLUS_ONE;
883 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
884 } else {
885 type = P2P_SCAN_SOCIAL;
886 p2p_dbg(p2p, "Starting search");
887 }
888
889 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
890 p2p->num_req_dev_types, p2p->req_dev_types,
891 p2p->find_dev_id, pw_id);
892 if (res < 0) {
893 p2p_dbg(p2p, "Scan request failed");
894 p2p_continue_find(p2p);
895 } else {
896 p2p_dbg(p2p, "Running p2p_scan");
897 p2p->p2p_scan_running = 1;
898 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
899 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
900 p2p, NULL);
901 }
902 }
903
904
905 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
906 {
907 struct p2p_data *p2p = eloop_ctx;
908 p2p_dbg(p2p, "Find timeout -> stop");
909 p2p_stop_find(p2p);
910 }
911
912
913 static int p2p_run_after_scan(struct p2p_data *p2p)
914 {
915 struct p2p_device *dev;
916 enum p2p_after_scan op;
917
918 if (p2p->after_scan_tx) {
919 p2p->after_scan_tx_in_progress = 1;
920 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
921 p2p->cfg->send_action(p2p->cfg->cb_ctx,
922 p2p->after_scan_tx->freq,
923 p2p->after_scan_tx->dst,
924 p2p->after_scan_tx->src,
925 p2p->after_scan_tx->bssid,
926 (u8 *) (p2p->after_scan_tx + 1),
927 p2p->after_scan_tx->len,
928 p2p->after_scan_tx->wait_time);
929 os_free(p2p->after_scan_tx);
930 p2p->after_scan_tx = NULL;
931 return 1;
932 }
933
934 op = p2p->start_after_scan;
935 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
936 switch (op) {
937 case P2P_AFTER_SCAN_NOTHING:
938 break;
939 case P2P_AFTER_SCAN_LISTEN:
940 p2p_dbg(p2p, "Start previously requested Listen state");
941 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
942 p2p->pending_listen_usec / 1000);
943 return 1;
944 case P2P_AFTER_SCAN_CONNECT:
945 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
946 MAC2STR(p2p->after_scan_peer));
947 dev = p2p_get_device(p2p, p2p->after_scan_peer);
948 if (dev == NULL) {
949 p2p_dbg(p2p, "Peer not known anymore");
950 break;
951 }
952 p2p_connect_send(p2p, dev);
953 return 1;
954 }
955
956 return 0;
957 }
958
959
960 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
961 {
962 struct p2p_data *p2p = eloop_ctx;
963 int running;
964 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
965 running = p2p->p2p_scan_running;
966 /* Make sure we recover from missed scan results callback */
967 p2p->p2p_scan_running = 0;
968
969 if (running)
970 p2p_run_after_scan(p2p);
971 }
972
973
974 static void p2p_free_req_dev_types(struct p2p_data *p2p)
975 {
976 p2p->num_req_dev_types = 0;
977 os_free(p2p->req_dev_types);
978 p2p->req_dev_types = NULL;
979 }
980
981
982 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
983 enum p2p_discovery_type type,
984 unsigned int num_req_dev_types, const u8 *req_dev_types,
985 const u8 *dev_id, unsigned int search_delay)
986 {
987 int res;
988
989 p2p_dbg(p2p, "Starting find (type=%d)", type);
990 os_get_reltime(&p2p->find_start);
991 if (p2p->p2p_scan_running) {
992 p2p_dbg(p2p, "p2p_scan is already running");
993 }
994
995 p2p_free_req_dev_types(p2p);
996 if (req_dev_types && num_req_dev_types) {
997 p2p->req_dev_types = os_malloc(num_req_dev_types *
998 WPS_DEV_TYPE_LEN);
999 if (p2p->req_dev_types == NULL)
1000 return -1;
1001 os_memcpy(p2p->req_dev_types, req_dev_types,
1002 num_req_dev_types * WPS_DEV_TYPE_LEN);
1003 p2p->num_req_dev_types = num_req_dev_types;
1004 }
1005
1006 if (dev_id) {
1007 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1008 p2p->find_dev_id = p2p->find_dev_id_buf;
1009 } else
1010 p2p->find_dev_id = NULL;
1011
1012 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1013 p2p_clear_timeout(p2p);
1014 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1015 p2p->find_type = type;
1016 p2p_device_clear_reported(p2p);
1017 p2p_set_state(p2p, P2P_SEARCH);
1018 p2p->search_delay = search_delay;
1019 p2p->in_search_delay = 0;
1020 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1021 p2p->last_p2p_find_timeout = timeout;
1022 if (timeout)
1023 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1024 p2p, NULL);
1025 switch (type) {
1026 case P2P_FIND_START_WITH_FULL:
1027 case P2P_FIND_PROGRESSIVE:
1028 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1029 p2p->num_req_dev_types,
1030 p2p->req_dev_types, dev_id,
1031 DEV_PW_DEFAULT);
1032 break;
1033 case P2P_FIND_ONLY_SOCIAL:
1034 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1035 p2p->num_req_dev_types,
1036 p2p->req_dev_types, dev_id,
1037 DEV_PW_DEFAULT);
1038 break;
1039 default:
1040 return -1;
1041 }
1042
1043 if (res == 0) {
1044 p2p_dbg(p2p, "Running p2p_scan");
1045 p2p->p2p_scan_running = 1;
1046 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1047 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1048 p2p, NULL);
1049 } else if (p2p->p2p_scan_running) {
1050 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1051 /* wait for the previous p2p_scan to complete */
1052 } else {
1053 p2p_dbg(p2p, "Failed to start p2p_scan");
1054 p2p_set_state(p2p, P2P_IDLE);
1055 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1056 }
1057
1058 return res;
1059 }
1060
1061
1062 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1063 {
1064 p2p_dbg(p2p, "Stopping find");
1065 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1066 p2p_clear_timeout(p2p);
1067 if (p2p->state == P2P_SEARCH)
1068 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1069 p2p_set_state(p2p, P2P_IDLE);
1070 p2p_free_req_dev_types(p2p);
1071 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1072 if (p2p->go_neg_peer)
1073 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1074 p2p->go_neg_peer = NULL;
1075 p2p->sd_peer = NULL;
1076 p2p->invite_peer = NULL;
1077 p2p_stop_listen_for_freq(p2p, freq);
1078 }
1079
1080
1081 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1082 {
1083 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1084 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1085 return;
1086 }
1087 if (p2p->in_listen) {
1088 p2p->in_listen = 0;
1089 p2p_clear_timeout(p2p);
1090 }
1091 if (p2p->drv_in_listen) {
1092 /*
1093 * The driver may not deliver callback to p2p_listen_end()
1094 * when the operation gets canceled, so clear the internal
1095 * variable that is tracking driver state.
1096 */
1097 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1098 p2p->drv_in_listen = 0;
1099 }
1100 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1101 }
1102
1103
1104 void p2p_stop_listen(struct p2p_data *p2p)
1105 {
1106 if (p2p->state != P2P_LISTEN_ONLY) {
1107 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1108 return;
1109 }
1110
1111 p2p_stop_listen_for_freq(p2p, 0);
1112 p2p_set_state(p2p, P2P_IDLE);
1113 }
1114
1115
1116 void p2p_stop_find(struct p2p_data *p2p)
1117 {
1118 p2p_stop_find_for_freq(p2p, 0);
1119 }
1120
1121
1122 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1123 unsigned int force_freq,
1124 unsigned int pref_freq, int go)
1125 {
1126 u8 op_class, op_channel;
1127 unsigned int freq = force_freq ? force_freq : pref_freq;
1128
1129 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1130 force_freq, pref_freq, go);
1131 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1132 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1133 return -1;
1134 }
1135
1136 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1137 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1138 op_channel))) {
1139 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1140 freq, op_class, op_channel);
1141 return -1;
1142 }
1143
1144 p2p->op_reg_class = op_class;
1145 p2p->op_channel = op_channel;
1146
1147 if (force_freq) {
1148 p2p->channels.reg_classes = 1;
1149 p2p->channels.reg_class[0].channels = 1;
1150 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1151 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1152 } else {
1153 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1154 sizeof(struct p2p_channels));
1155 }
1156
1157 return 0;
1158 }
1159
1160
1161 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1162 {
1163 u8 op_class, op_channel;
1164 const int op_classes_5ghz[] = { 124, 115, 0 };
1165 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1166 const int op_classes_vht[] = { 128, 0 };
1167
1168 p2p_dbg(p2p, "Prepare channel best");
1169
1170 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1171 p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1172 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1173 == 0) {
1174 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1175 p2p->op_reg_class = op_class;
1176 p2p->op_channel = op_channel;
1177 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1178 p2p_supported_freq(p2p, p2p->best_freq_5) &&
1179 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1180 == 0) {
1181 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1182 p2p->op_reg_class = op_class;
1183 p2p->op_channel = op_channel;
1184 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1185 p2p_supported_freq(p2p, p2p->best_freq_24) &&
1186 p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1187 &op_channel) == 0) {
1188 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1189 p2p->op_reg_class = op_class;
1190 p2p->op_channel = op_channel;
1191 } else if (p2p->cfg->num_pref_chan > 0 &&
1192 p2p_channels_includes(&p2p->cfg->channels,
1193 p2p->cfg->pref_chan[0].op_class,
1194 p2p->cfg->pref_chan[0].chan)) {
1195 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1196 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1197 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1198 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1199 &p2p->op_reg_class, &p2p->op_channel) ==
1200 0) {
1201 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1202 p2p->op_reg_class, p2p->op_channel);
1203 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1204 &p2p->op_reg_class, &p2p->op_channel) ==
1205 0) {
1206 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1207 p2p->op_reg_class, p2p->op_channel);
1208 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1209 &p2p->op_reg_class, &p2p->op_channel) ==
1210 0) {
1211 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1212 p2p->op_reg_class, p2p->op_channel);
1213 } else {
1214 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1215 p2p->op_reg_class = p2p->cfg->op_reg_class;
1216 p2p->op_channel = p2p->cfg->op_channel;
1217 }
1218
1219 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1220 sizeof(struct p2p_channels));
1221 }
1222
1223
1224 /**
1225 * p2p_prepare_channel - Select operating channel for GO Negotiation
1226 * @p2p: P2P module context from p2p_init()
1227 * @dev: Selected peer device
1228 * @force_freq: Forced frequency in MHz or 0 if not forced
1229 * @pref_freq: Preferred frequency in MHz or 0 if no preference
1230 * @go: Whether the local end will be forced to be GO
1231 * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1232 *
1233 * This function is used to do initial operating channel selection for GO
1234 * Negotiation prior to having received peer information. The selected channel
1235 * may be further optimized in p2p_reselect_channel() once the peer information
1236 * is available.
1237 */
1238 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1239 unsigned int force_freq, unsigned int pref_freq, int go)
1240 {
1241 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1242 force_freq, pref_freq, go);
1243 if (force_freq || pref_freq) {
1244 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1245 0)
1246 return -1;
1247 } else {
1248 p2p_prepare_channel_best(p2p);
1249 }
1250 p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1251 if (go)
1252 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1253 else if (!force_freq)
1254 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels,
1255 &p2p->channels);
1256 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1257
1258 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1259 p2p->op_reg_class, p2p->op_channel,
1260 force_freq ? " (forced)" : "");
1261
1262 if (force_freq)
1263 dev->flags |= P2P_DEV_FORCE_FREQ;
1264 else
1265 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1266
1267 return 0;
1268 }
1269
1270
1271 static void p2p_set_dev_persistent(struct p2p_device *dev,
1272 int persistent_group)
1273 {
1274 switch (persistent_group) {
1275 case 0:
1276 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1277 P2P_DEV_PREFER_PERSISTENT_RECONN);
1278 break;
1279 case 1:
1280 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1281 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1282 break;
1283 case 2:
1284 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1285 P2P_DEV_PREFER_PERSISTENT_RECONN;
1286 break;
1287 }
1288 }
1289
1290
1291 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1292 enum p2p_wps_method wps_method,
1293 int go_intent, const u8 *own_interface_addr,
1294 unsigned int force_freq, int persistent_group,
1295 const u8 *force_ssid, size_t force_ssid_len,
1296 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1297 {
1298 struct p2p_device *dev;
1299
1300 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1301 " GO Intent=%d Intended Interface Address=" MACSTR
1302 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1303 "oob_pw_id=%u",
1304 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1305 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1306
1307 dev = p2p_get_device(p2p, peer_addr);
1308 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1309 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1310 MAC2STR(peer_addr));
1311 return -1;
1312 }
1313
1314 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1315 go_intent == 15) < 0)
1316 return -1;
1317
1318 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1319 if (!(dev->info.dev_capab &
1320 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1321 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1322 " that is in a group and is not discoverable",
1323 MAC2STR(peer_addr));
1324 return -1;
1325 }
1326 if (dev->oper_freq <= 0) {
1327 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1328 " with incomplete information",
1329 MAC2STR(peer_addr));
1330 return -1;
1331 }
1332
1333 /*
1334 * First, try to connect directly. If the peer does not
1335 * acknowledge frames, assume it is sleeping and use device
1336 * discoverability via the GO at that point.
1337 */
1338 }
1339
1340 p2p->ssid_set = 0;
1341 if (force_ssid) {
1342 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1343 force_ssid, force_ssid_len);
1344 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1345 p2p->ssid_len = force_ssid_len;
1346 p2p->ssid_set = 1;
1347 }
1348
1349 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1350 dev->flags &= ~P2P_DEV_USER_REJECTED;
1351 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1352 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1353 if (pd_before_go_neg)
1354 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1355 else {
1356 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1357 /*
1358 * Assign dialog token and tie breaker here to use the same
1359 * values in each retry within the same GO Negotiation exchange.
1360 */
1361 dev->dialog_token++;
1362 if (dev->dialog_token == 0)
1363 dev->dialog_token = 1;
1364 dev->tie_breaker = p2p->next_tie_breaker;
1365 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1366 }
1367 dev->connect_reqs = 0;
1368 dev->go_neg_req_sent = 0;
1369 dev->go_state = UNKNOWN_GO;
1370 p2p_set_dev_persistent(dev, persistent_group);
1371 p2p->go_intent = go_intent;
1372 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1373
1374 if (p2p->state != P2P_IDLE)
1375 p2p_stop_find(p2p);
1376
1377 if (p2p->after_scan_tx) {
1378 /*
1379 * We need to drop the pending frame to avoid issues with the
1380 * new GO Negotiation, e.g., when the pending frame was from a
1381 * previous attempt at starting a GO Negotiation.
1382 */
1383 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1384 os_free(p2p->after_scan_tx);
1385 p2p->after_scan_tx = NULL;
1386 }
1387
1388 dev->wps_method = wps_method;
1389 dev->oob_pw_id = oob_pw_id;
1390 dev->status = P2P_SC_SUCCESS;
1391
1392 if (p2p->p2p_scan_running) {
1393 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1394 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1395 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1396 return 0;
1397 }
1398 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1399
1400 return p2p_connect_send(p2p, dev);
1401 }
1402
1403
1404 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1405 enum p2p_wps_method wps_method,
1406 int go_intent, const u8 *own_interface_addr,
1407 unsigned int force_freq, int persistent_group,
1408 const u8 *force_ssid, size_t force_ssid_len,
1409 unsigned int pref_freq, u16 oob_pw_id)
1410 {
1411 struct p2p_device *dev;
1412
1413 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1414 " GO Intent=%d Intended Interface Address=" MACSTR
1415 " wps_method=%d persistent_group=%d oob_pw_id=%u",
1416 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1417 wps_method, persistent_group, oob_pw_id);
1418
1419 dev = p2p_get_device(p2p, peer_addr);
1420 if (dev == NULL) {
1421 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1422 MAC2STR(peer_addr));
1423 return -1;
1424 }
1425
1426 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1427 15) < 0)
1428 return -1;
1429
1430 p2p->ssid_set = 0;
1431 if (force_ssid) {
1432 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1433 force_ssid, force_ssid_len);
1434 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1435 p2p->ssid_len = force_ssid_len;
1436 p2p->ssid_set = 1;
1437 }
1438
1439 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1440 dev->flags &= ~P2P_DEV_USER_REJECTED;
1441 dev->go_neg_req_sent = 0;
1442 dev->go_state = UNKNOWN_GO;
1443 p2p_set_dev_persistent(dev, persistent_group);
1444 p2p->go_intent = go_intent;
1445 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1446
1447 dev->wps_method = wps_method;
1448 dev->oob_pw_id = oob_pw_id;
1449 dev->status = P2P_SC_SUCCESS;
1450
1451 return 0;
1452 }
1453
1454
1455 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1456 struct p2p_device *dev, struct p2p_message *msg)
1457 {
1458 os_get_reltime(&dev->last_seen);
1459
1460 p2p_copy_wps_info(p2p, dev, 0, msg);
1461
1462 if (msg->listen_channel) {
1463 int freq;
1464 freq = p2p_channel_to_freq(msg->listen_channel[3],
1465 msg->listen_channel[4]);
1466 if (freq < 0) {
1467 p2p_dbg(p2p, "Unknown peer Listen channel: "
1468 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1469 msg->listen_channel[0],
1470 msg->listen_channel[1],
1471 msg->listen_channel[2],
1472 msg->listen_channel[3],
1473 msg->listen_channel[4]);
1474 } else {
1475 p2p_dbg(p2p, "Update peer " MACSTR
1476 " Listen channel: %u -> %u MHz",
1477 MAC2STR(dev->info.p2p_device_addr),
1478 dev->listen_freq, freq);
1479 dev->listen_freq = freq;
1480 }
1481 }
1482
1483 if (msg->wfd_subelems) {
1484 wpabuf_free(dev->info.wfd_subelems);
1485 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1486 }
1487
1488 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1489 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1490 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1491 } else {
1492 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1493 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1494 "listen_freq=%d",
1495 MAC2STR(dev->info.p2p_device_addr),
1496 dev->info.dev_capab, dev->info.group_capab,
1497 dev->info.device_name, dev->listen_freq);
1498 }
1499
1500 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1501
1502 if (dev->flags & P2P_DEV_USER_REJECTED) {
1503 p2p_dbg(p2p, "Do not report rejected device");
1504 return;
1505 }
1506
1507 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1508 !(dev->flags & P2P_DEV_REPORTED_ONCE));
1509 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1510 }
1511
1512
1513 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1514 {
1515 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1516 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1517 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1518 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1519 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1520 }
1521
1522
1523 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1524 {
1525 p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1526 p2p_random(params->passphrase, 8);
1527 return 0;
1528 }
1529
1530
1531 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1532 {
1533 struct p2p_go_neg_results res;
1534 int go = peer->go_state == LOCAL_GO;
1535 struct p2p_channels intersection;
1536 int freqs;
1537 size_t i, j;
1538
1539 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1540 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1541
1542 os_memset(&res, 0, sizeof(res));
1543 res.role_go = go;
1544 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1545 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1546 res.wps_method = peer->wps_method;
1547 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1548 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1549 res.persistent_group = 2;
1550 else
1551 res.persistent_group = 1;
1552 }
1553
1554 if (go) {
1555 /* Setup AP mode for WPS provisioning */
1556 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1557 p2p->op_channel);
1558 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1559 res.ssid_len = p2p->ssid_len;
1560 p2p_random(res.passphrase, 8);
1561 } else {
1562 res.freq = peer->oper_freq;
1563 if (p2p->ssid_len) {
1564 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1565 res.ssid_len = p2p->ssid_len;
1566 }
1567 }
1568
1569 p2p_channels_dump(p2p, "own channels", &p2p->channels);
1570 p2p_channels_dump(p2p, "peer channels", &peer->channels);
1571 p2p_channels_intersect(&p2p->channels, &peer->channels,
1572 &intersection);
1573 if (go) {
1574 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1575 p2p_channels_dump(p2p, "intersection after no-GO removal",
1576 &intersection);
1577 }
1578 freqs = 0;
1579 for (i = 0; i < intersection.reg_classes; i++) {
1580 struct p2p_reg_class *c = &intersection.reg_class[i];
1581 if (freqs + 1 == P2P_MAX_CHANNELS)
1582 break;
1583 for (j = 0; j < c->channels; j++) {
1584 int freq;
1585 if (freqs + 1 == P2P_MAX_CHANNELS)
1586 break;
1587 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]);
1588 if (freq < 0)
1589 continue;
1590 res.freq_list[freqs++] = freq;
1591 }
1592 }
1593
1594 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1595
1596 p2p_clear_timeout(p2p);
1597 p2p->ssid_set = 0;
1598 peer->go_neg_req_sent = 0;
1599 peer->wps_method = WPS_NOT_READY;
1600 peer->oob_pw_id = 0;
1601
1602 p2p_set_state(p2p, P2P_PROVISIONING);
1603 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1604 }
1605
1606
1607 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1608 const u8 *data, size_t len, int rx_freq)
1609 {
1610 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1611 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1612
1613 if (len < 1)
1614 return;
1615
1616 switch (data[0]) {
1617 case P2P_GO_NEG_REQ:
1618 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1619 break;
1620 case P2P_GO_NEG_RESP:
1621 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1622 break;
1623 case P2P_GO_NEG_CONF:
1624 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1625 break;
1626 case P2P_INVITATION_REQ:
1627 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1628 rx_freq);
1629 break;
1630 case P2P_INVITATION_RESP:
1631 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
1632 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1633 break;
1634 case P2P_PROV_DISC_REQ:
1635 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1636 break;
1637 case P2P_PROV_DISC_RESP:
1638 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1639 break;
1640 case P2P_DEV_DISC_REQ:
1641 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1642 break;
1643 case P2P_DEV_DISC_RESP:
1644 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1645 break;
1646 default:
1647 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1648 data[0]);
1649 break;
1650 }
1651 }
1652
1653
1654 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1655 const u8 *sa, const u8 *bssid, const u8 *data,
1656 size_t len, int freq)
1657 {
1658 if (len < 1)
1659 return;
1660
1661 switch (data[0]) {
1662 case WLAN_PA_VENDOR_SPECIFIC:
1663 data++;
1664 len--;
1665 if (len < 3)
1666 return;
1667 if (WPA_GET_BE24(data) != OUI_WFA)
1668 return;
1669
1670 data += 3;
1671 len -= 3;
1672 if (len < 1)
1673 return;
1674
1675 if (*data != P2P_OUI_TYPE)
1676 return;
1677
1678 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq);
1679 break;
1680 case WLAN_PA_GAS_INITIAL_REQ:
1681 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1682 break;
1683 case WLAN_PA_GAS_INITIAL_RESP:
1684 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1685 break;
1686 case WLAN_PA_GAS_COMEBACK_REQ:
1687 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1688 break;
1689 case WLAN_PA_GAS_COMEBACK_RESP:
1690 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1691 break;
1692 }
1693 }
1694
1695
1696 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1697 const u8 *bssid, u8 category,
1698 const u8 *data, size_t len, int freq)
1699 {
1700 if (category == WLAN_ACTION_PUBLIC) {
1701 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1702 return;
1703 }
1704
1705 if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1706 return;
1707
1708 if (len < 4)
1709 return;
1710
1711 if (WPA_GET_BE24(data) != OUI_WFA)
1712 return;
1713 data += 3;
1714 len -= 3;
1715
1716 if (*data != P2P_OUI_TYPE)
1717 return;
1718 data++;
1719 len--;
1720
1721 /* P2P action frame */
1722 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1723 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1724
1725 if (len < 1)
1726 return;
1727 switch (data[0]) {
1728 case P2P_NOA:
1729 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1730 /* TODO */
1731 break;
1732 case P2P_PRESENCE_REQ:
1733 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1734 break;
1735 case P2P_PRESENCE_RESP:
1736 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1737 break;
1738 case P2P_GO_DISC_REQ:
1739 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1740 break;
1741 default:
1742 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1743 break;
1744 }
1745 }
1746
1747
1748 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1749 {
1750 struct p2p_data *p2p = eloop_ctx;
1751 if (p2p->go_neg_peer == NULL)
1752 return;
1753 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1754 p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1755 p2p_connect_send(p2p, p2p->go_neg_peer);
1756 }
1757
1758
1759 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1760 {
1761 struct p2p_data *p2p = eloop_ctx;
1762 if (p2p->invite_peer == NULL)
1763 return;
1764 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1765 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr);
1766 }
1767
1768
1769 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1770 const u8 *ie, size_t ie_len)
1771 {
1772 struct p2p_message msg;
1773 struct p2p_device *dev;
1774
1775 os_memset(&msg, 0, sizeof(msg));
1776 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1777 {
1778 p2p_parse_free(&msg);
1779 return; /* not a P2P probe */
1780 }
1781
1782 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1783 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1784 != 0) {
1785 /* The Probe Request is not part of P2P Device Discovery. It is
1786 * not known whether the source address of the frame is the P2P
1787 * Device Address or P2P Interface Address. Do not add a new
1788 * peer entry based on this frames.
1789 */
1790 p2p_parse_free(&msg);
1791 return;
1792 }
1793
1794 dev = p2p_get_device(p2p, addr);
1795 if (dev) {
1796 if (dev->country[0] == 0 && msg.listen_channel)
1797 os_memcpy(dev->country, msg.listen_channel, 3);
1798 os_get_reltime(&dev->last_seen);
1799 p2p_parse_free(&msg);
1800 return; /* already known */
1801 }
1802
1803 dev = p2p_create_device(p2p, addr);
1804 if (dev == NULL) {
1805 p2p_parse_free(&msg);
1806 return;
1807 }
1808
1809 os_get_reltime(&dev->last_seen);
1810 dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1811
1812 if (msg.listen_channel) {
1813 os_memcpy(dev->country, msg.listen_channel, 3);
1814 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
1815 msg.listen_channel[4]);
1816 }
1817
1818 p2p_copy_wps_info(p2p, dev, 1, &msg);
1819
1820 if (msg.wfd_subelems) {
1821 wpabuf_free(dev->info.wfd_subelems);
1822 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1823 }
1824
1825 p2p_parse_free(&msg);
1826
1827 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
1828 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1829 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1830 dev->info.group_capab, dev->info.device_name,
1831 dev->listen_freq);
1832 }
1833
1834
1835 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1836 const u8 *addr,
1837 struct p2p_message *msg)
1838 {
1839 struct p2p_device *dev;
1840
1841 dev = p2p_get_device(p2p, addr);
1842 if (dev) {
1843 os_get_reltime(&dev->last_seen);
1844 return dev; /* already known */
1845 }
1846
1847 dev = p2p_create_device(p2p, addr);
1848 if (dev == NULL)
1849 return NULL;
1850
1851 p2p_add_dev_info(p2p, addr, dev, msg);
1852
1853 return dev;
1854 }
1855
1856
1857 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1858 {
1859 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1860 return 1;
1861 if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1862 WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1863 WPA_GET_BE16(&req_dev_type[6]) == 0)
1864 return 1; /* Category match with wildcard OUI/sub-category */
1865 return 0;
1866 }
1867
1868
1869 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1870 size_t num_req_dev_type)
1871 {
1872 size_t i;
1873 for (i = 0; i < num_req_dev_type; i++) {
1874 if (dev_type_match(dev_type, req_dev_type[i]))
1875 return 1;
1876 }
1877 return 0;
1878 }
1879
1880
1881 /**
1882 * p2p_match_dev_type - Match local device type with requested type
1883 * @p2p: P2P module context from p2p_init()
1884 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1885 * Returns: 1 on match, 0 on mismatch
1886 *
1887 * This function can be used to match the Requested Device Type attribute in
1888 * WPS IE with the local device types for deciding whether to reply to a Probe
1889 * Request frame.
1890 */
1891 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
1892 {
1893 struct wps_parse_attr attr;
1894 size_t i;
1895
1896 if (wps_parse_msg(wps, &attr))
1897 return 1; /* assume no Requested Device Type attributes */
1898
1899 if (attr.num_req_dev_type == 0)
1900 return 1; /* no Requested Device Type attributes -> match */
1901
1902 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
1903 attr.num_req_dev_type))
1904 return 1; /* Own Primary Device Type matches */
1905
1906 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
1907 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
1908 attr.req_dev_type,
1909 attr.num_req_dev_type))
1910 return 1; /* Own Secondary Device Type matches */
1911
1912 /* No matching device type found */
1913 return 0;
1914 }
1915
1916
1917 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
1918 {
1919 struct wpabuf *buf;
1920 u8 *len;
1921 int pw_id = -1;
1922 size_t extra = 0;
1923
1924 #ifdef CONFIG_WIFI_DISPLAY
1925 if (p2p->wfd_ie_probe_resp)
1926 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
1927 #endif /* CONFIG_WIFI_DISPLAY */
1928
1929 buf = wpabuf_alloc(1000 + extra);
1930 if (buf == NULL)
1931 return NULL;
1932
1933 if (p2p->go_neg_peer) {
1934 /* Advertise immediate availability of WPS credential */
1935 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
1936 }
1937
1938 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
1939 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
1940 wpabuf_free(buf);
1941 return NULL;
1942 }
1943
1944 #ifdef CONFIG_WIFI_DISPLAY
1945 if (p2p->wfd_ie_probe_resp)
1946 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
1947 #endif /* CONFIG_WIFI_DISPLAY */
1948
1949 /* P2P IE */
1950 len = p2p_buf_add_ie_hdr(buf);
1951 p2p_buf_add_capability(buf, p2p->dev_capab &
1952 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
1953 if (p2p->ext_listen_interval)
1954 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
1955 p2p->ext_listen_interval);
1956 p2p_buf_add_device_info(buf, p2p, NULL);
1957 p2p_buf_update_ie_hdr(buf, len);
1958
1959 return buf;
1960 }
1961
1962
1963 static enum p2p_probe_req_status
1964 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
1965 const u8 *bssid, const u8 *ie, size_t ie_len)
1966 {
1967 struct ieee802_11_elems elems;
1968 struct wpabuf *buf;
1969 struct ieee80211_mgmt *resp;
1970 struct p2p_message msg;
1971 struct wpabuf *ies;
1972
1973 if (!p2p->in_listen || !p2p->drv_in_listen) {
1974 /* not in Listen state - ignore Probe Request */
1975 return P2P_PREQ_NOT_LISTEN;
1976 }
1977
1978 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
1979 ParseFailed) {
1980 /* Ignore invalid Probe Request frames */
1981 return P2P_PREQ_MALFORMED;
1982 }
1983
1984 if (elems.p2p == NULL) {
1985 /* not a P2P probe - ignore it */
1986 return P2P_PREQ_NOT_P2P;
1987 }
1988
1989 if (dst && !is_broadcast_ether_addr(dst) &&
1990 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
1991 /* Not sent to the broadcast address or our P2P Device Address
1992 */
1993 return P2P_PREQ_NOT_PROCESSED;
1994 }
1995
1996 if (bssid && !is_broadcast_ether_addr(bssid)) {
1997 /* Not sent to the Wildcard BSSID */
1998 return P2P_PREQ_NOT_PROCESSED;
1999 }
2000
2001 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2002 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2003 0) {
2004 /* not using P2P Wildcard SSID - ignore */
2005 return P2P_PREQ_NOT_PROCESSED;
2006 }
2007
2008 if (supp_rates_11b_only(&elems)) {
2009 /* Indicates support for 11b rates only */
2010 return P2P_PREQ_NOT_P2P;
2011 }
2012
2013 os_memset(&msg, 0, sizeof(msg));
2014 if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2015 /* Could not parse P2P attributes */
2016 return P2P_PREQ_NOT_P2P;
2017 }
2018
2019 if (msg.device_id &&
2020 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2021 /* Device ID did not match */
2022 p2p_parse_free(&msg);
2023 return P2P_PREQ_NOT_PROCESSED;
2024 }
2025
2026 /* Check Requested Device Type match */
2027 if (msg.wps_attributes &&
2028 !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2029 /* No match with Requested Device Type */
2030 p2p_parse_free(&msg);
2031 return P2P_PREQ_NOT_PROCESSED;
2032 }
2033 p2p_parse_free(&msg);
2034
2035 if (!p2p->cfg->send_probe_resp) {
2036 /* Response generated elsewhere */
2037 return P2P_PREQ_NOT_PROCESSED;
2038 }
2039
2040 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2041
2042 /*
2043 * We do not really have a specific BSS that this frame is advertising,
2044 * so build a frame that has some information in valid format. This is
2045 * really only used for discovery purposes, not to learn exact BSS
2046 * parameters.
2047 */
2048 ies = p2p_build_probe_resp_ies(p2p);
2049 if (ies == NULL)
2050 return P2P_PREQ_NOT_PROCESSED;
2051
2052 buf = wpabuf_alloc(200 + wpabuf_len(ies));
2053 if (buf == NULL) {
2054 wpabuf_free(ies);
2055 return P2P_PREQ_NOT_PROCESSED;
2056 }
2057
2058 resp = NULL;
2059 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2060
2061 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2062 (WLAN_FC_STYPE_PROBE_RESP << 4));
2063 os_memcpy(resp->da, addr, ETH_ALEN);
2064 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2065 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2066 resp->u.probe_resp.beacon_int = host_to_le16(100);
2067 /* hardware or low-level driver will setup seq_ctrl and timestamp */
2068 resp->u.probe_resp.capab_info =
2069 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2070 WLAN_CAPABILITY_PRIVACY |
2071 WLAN_CAPABILITY_SHORT_SLOT_TIME);
2072
2073 wpabuf_put_u8(buf, WLAN_EID_SSID);
2074 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2075 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2076
2077 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2078 wpabuf_put_u8(buf, 8);
2079 wpabuf_put_u8(buf, (60 / 5) | 0x80);
2080 wpabuf_put_u8(buf, 90 / 5);
2081 wpabuf_put_u8(buf, (120 / 5) | 0x80);
2082 wpabuf_put_u8(buf, 180 / 5);
2083 wpabuf_put_u8(buf, (240 / 5) | 0x80);
2084 wpabuf_put_u8(buf, 360 / 5);
2085 wpabuf_put_u8(buf, 480 / 5);
2086 wpabuf_put_u8(buf, 540 / 5);
2087
2088 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2089 wpabuf_put_u8(buf, 1);
2090 wpabuf_put_u8(buf, p2p->cfg->channel);
2091
2092 wpabuf_put_buf(buf, ies);
2093 wpabuf_free(ies);
2094
2095 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2096
2097 wpabuf_free(buf);
2098
2099 return P2P_PREQ_NOT_PROCESSED;
2100 }
2101
2102
2103 enum p2p_probe_req_status
2104 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2105 const u8 *bssid, const u8 *ie, size_t ie_len)
2106 {
2107 enum p2p_probe_req_status res;
2108
2109 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2110
2111 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2112
2113 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2114 p2p->go_neg_peer &&
2115 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2116 == 0 &&
2117 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2118 /* Received a Probe Request from GO Negotiation peer */
2119 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2120 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2121 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2122 return P2P_PREQ_PROCESSED;
2123 }
2124
2125 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2126 p2p->invite_peer &&
2127 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2128 == 0) {
2129 /* Received a Probe Request from Invite peer */
2130 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2131 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2132 return P2P_PREQ_PROCESSED;
2133 }
2134
2135 return res;
2136 }
2137
2138
2139 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2140 u8 *buf, size_t len, struct wpabuf *p2p_ie)
2141 {
2142 struct wpabuf *tmp;
2143 u8 *lpos;
2144 size_t tmplen;
2145 int res;
2146 u8 group_capab;
2147
2148 if (p2p_ie == NULL)
2149 return 0; /* WLAN AP is not a P2P manager */
2150
2151 /*
2152 * (Re)Association Request - P2P IE
2153 * P2P Capability attribute (shall be present)
2154 * P2P Interface attribute (present if concurrent device and
2155 * P2P Management is enabled)
2156 */
2157 tmp = wpabuf_alloc(200);
2158 if (tmp == NULL)
2159 return -1;
2160
2161 lpos = p2p_buf_add_ie_hdr(tmp);
2162 group_capab = 0;
2163 if (p2p->num_groups > 0) {
2164 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2165 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2166 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2167 p2p->cross_connect)
2168 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2169 }
2170 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2171 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2172 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2173 p2p_buf_add_p2p_interface(tmp, p2p);
2174 p2p_buf_update_ie_hdr(tmp, lpos);
2175
2176 tmplen = wpabuf_len(tmp);
2177 if (tmplen > len)
2178 res = -1;
2179 else {
2180 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2181 res = tmplen;
2182 }
2183 wpabuf_free(tmp);
2184
2185 return res;
2186 }
2187
2188
2189 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2190 size_t len, int p2p_group, struct wpabuf *p2p_ie)
2191 {
2192 struct wpabuf *tmp;
2193 u8 *lpos;
2194 struct p2p_device *peer;
2195 size_t tmplen;
2196 int res;
2197 size_t extra = 0;
2198
2199 if (!p2p_group)
2200 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2201
2202 #ifdef CONFIG_WIFI_DISPLAY
2203 if (p2p->wfd_ie_assoc_req)
2204 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2205 #endif /* CONFIG_WIFI_DISPLAY */
2206
2207 /*
2208 * (Re)Association Request - P2P IE
2209 * P2P Capability attribute (shall be present)
2210 * Extended Listen Timing (may be present)
2211 * P2P Device Info attribute (shall be present)
2212 */
2213 tmp = wpabuf_alloc(200 + extra);
2214 if (tmp == NULL)
2215 return -1;
2216
2217 #ifdef CONFIG_WIFI_DISPLAY
2218 if (p2p->wfd_ie_assoc_req)
2219 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2220 #endif /* CONFIG_WIFI_DISPLAY */
2221
2222 peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2223
2224 lpos = p2p_buf_add_ie_hdr(tmp);
2225 p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2226 if (p2p->ext_listen_interval)
2227 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2228 p2p->ext_listen_interval);
2229 p2p_buf_add_device_info(tmp, p2p, peer);
2230 p2p_buf_update_ie_hdr(tmp, lpos);
2231
2232 tmplen = wpabuf_len(tmp);
2233 if (tmplen > len)
2234 res = -1;
2235 else {
2236 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2237 res = tmplen;
2238 }
2239 wpabuf_free(tmp);
2240
2241 return res;
2242 }
2243
2244
2245 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2246 {
2247 struct wpabuf *p2p_ie;
2248 int ret;
2249
2250 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2251 if (p2p_ie == NULL)
2252 return 0;
2253
2254 ret = p2p_attr_text(p2p_ie, buf, end);
2255 wpabuf_free(p2p_ie);
2256 return ret;
2257 }
2258
2259
2260 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2261 {
2262 struct p2p_message msg;
2263
2264 os_memset(&msg, 0, sizeof(msg));
2265 if (p2p_parse_p2p_ie(p2p_ie, &msg))
2266 return -1;
2267
2268 if (msg.p2p_device_addr) {
2269 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2270 return 0;
2271 } else if (msg.device_id) {
2272 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2273 return 0;
2274 }
2275 return -1;
2276 }
2277
2278
2279 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2280 {
2281 struct wpabuf *p2p_ie;
2282 int ret;
2283
2284 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2285 P2P_IE_VENDOR_TYPE);
2286 if (p2p_ie == NULL)
2287 return -1;
2288 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2289 wpabuf_free(p2p_ie);
2290 return ret;
2291 }
2292
2293
2294 static void p2p_clear_go_neg(struct p2p_data *p2p)
2295 {
2296 p2p->go_neg_peer = NULL;
2297 p2p_clear_timeout(p2p);
2298 p2p_set_state(p2p, P2P_IDLE);
2299 }
2300
2301
2302 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2303 {
2304 if (p2p->go_neg_peer == NULL) {
2305 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2306 return; /* No pending Group Formation */
2307 }
2308
2309 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2310 0) {
2311 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2312 MACSTR " (GO Negotiation peer " MACSTR ")",
2313 MAC2STR(mac_addr),
2314 MAC2STR(p2p->go_neg_peer->intended_addr));
2315 return; /* Ignore unexpected peer address */
2316 }
2317
2318 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2319 MAC2STR(mac_addr));
2320
2321 p2p_clear_go_neg(p2p);
2322 }
2323
2324
2325 void p2p_group_formation_failed(struct p2p_data *p2p)
2326 {
2327 if (p2p->go_neg_peer == NULL) {
2328 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2329 return; /* No pending Group Formation */
2330 }
2331
2332 p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2333 MAC2STR(p2p->go_neg_peer->intended_addr));
2334
2335 p2p_clear_go_neg(p2p);
2336 }
2337
2338
2339 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2340 {
2341 struct p2p_data *p2p;
2342
2343 if (cfg->max_peers < 1)
2344 return NULL;
2345
2346 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2347 if (p2p == NULL)
2348 return NULL;
2349 p2p->cfg = (struct p2p_config *) (p2p + 1);
2350 os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2351 if (cfg->dev_name)
2352 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2353 if (cfg->manufacturer)
2354 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2355 if (cfg->model_name)
2356 p2p->cfg->model_name = os_strdup(cfg->model_name);
2357 if (cfg->model_number)
2358 p2p->cfg->model_number = os_strdup(cfg->model_number);
2359 if (cfg->serial_number)
2360 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2361 if (cfg->pref_chan) {
2362 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2363 sizeof(struct p2p_channel));
2364 if (p2p->cfg->pref_chan) {
2365 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2366 cfg->num_pref_chan *
2367 sizeof(struct p2p_channel));
2368 } else
2369 p2p->cfg->num_pref_chan = 0;
2370 }
2371
2372 p2p->min_disc_int = 1;
2373 p2p->max_disc_int = 3;
2374 p2p->max_disc_tu = -1;
2375
2376 os_get_random(&p2p->next_tie_breaker, 1);
2377 p2p->next_tie_breaker &= 0x01;
2378 if (cfg->sd_request)
2379 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2380 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2381 if (cfg->concurrent_operations)
2382 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2383 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2384
2385 dl_list_init(&p2p->devices);
2386
2387 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2388 p2p_expiration_timeout, p2p, NULL);
2389
2390 p2p->go_timeout = 100;
2391 p2p->client_timeout = 20;
2392
2393 p2p_dbg(p2p, "initialized");
2394 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2395 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2396
2397 return p2p;
2398 }
2399
2400
2401 void p2p_deinit(struct p2p_data *p2p)
2402 {
2403 #ifdef CONFIG_WIFI_DISPLAY
2404 wpabuf_free(p2p->wfd_ie_beacon);
2405 wpabuf_free(p2p->wfd_ie_probe_req);
2406 wpabuf_free(p2p->wfd_ie_probe_resp);
2407 wpabuf_free(p2p->wfd_ie_assoc_req);
2408 wpabuf_free(p2p->wfd_ie_invitation);
2409 wpabuf_free(p2p->wfd_ie_prov_disc_req);
2410 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2411 wpabuf_free(p2p->wfd_ie_go_neg);
2412 wpabuf_free(p2p->wfd_dev_info);
2413 wpabuf_free(p2p->wfd_assoc_bssid);
2414 wpabuf_free(p2p->wfd_coupled_sink_info);
2415 #endif /* CONFIG_WIFI_DISPLAY */
2416
2417 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2418 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2419 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2420 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2421 p2p_flush(p2p);
2422 p2p_free_req_dev_types(p2p);
2423 os_free(p2p->cfg->dev_name);
2424 os_free(p2p->cfg->manufacturer);
2425 os_free(p2p->cfg->model_name);
2426 os_free(p2p->cfg->model_number);
2427 os_free(p2p->cfg->serial_number);
2428 os_free(p2p->cfg->pref_chan);
2429 os_free(p2p->groups);
2430 wpabuf_free(p2p->sd_resp);
2431 os_free(p2p->after_scan_tx);
2432 p2p_remove_wps_vendor_extensions(p2p);
2433 os_free(p2p->no_go_freq.range);
2434 os_free(p2p);
2435 }
2436
2437
2438 void p2p_flush(struct p2p_data *p2p)
2439 {
2440 struct p2p_device *dev, *prev;
2441 p2p_stop_find(p2p);
2442 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2443 list) {
2444 dl_list_del(&dev->list);
2445 p2p_device_free(p2p, dev);
2446 }
2447 p2p_free_sd_queries(p2p);
2448 os_free(p2p->after_scan_tx);
2449 p2p->after_scan_tx = NULL;
2450 }
2451
2452
2453 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2454 {
2455 struct p2p_device *dev;
2456
2457 dev = p2p_get_device(p2p, addr);
2458 if (dev == NULL)
2459 return -1;
2460
2461 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2462
2463 if (p2p->go_neg_peer == dev)
2464 p2p->go_neg_peer = NULL;
2465
2466 dev->wps_method = WPS_NOT_READY;
2467 dev->oob_pw_id = 0;
2468 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2469 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2470
2471 /* Check if after_scan_tx is for this peer. If so free it */
2472 if (p2p->after_scan_tx &&
2473 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2474 os_free(p2p->after_scan_tx);
2475 p2p->after_scan_tx = NULL;
2476 }
2477
2478 return 0;
2479 }
2480
2481
2482 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2483 {
2484 os_free(p2p->cfg->dev_name);
2485 if (dev_name) {
2486 p2p->cfg->dev_name = os_strdup(dev_name);
2487 if (p2p->cfg->dev_name == NULL)
2488 return -1;
2489 } else
2490 p2p->cfg->dev_name = NULL;
2491 return 0;
2492 }
2493
2494
2495 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2496 {
2497 os_free(p2p->cfg->manufacturer);
2498 p2p->cfg->manufacturer = NULL;
2499 if (manufacturer) {
2500 p2p->cfg->manufacturer = os_strdup(manufacturer);
2501 if (p2p->cfg->manufacturer == NULL)
2502 return -1;
2503 }
2504
2505 return 0;
2506 }
2507
2508
2509 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2510 {
2511 os_free(p2p->cfg->model_name);
2512 p2p->cfg->model_name = NULL;
2513 if (model_name) {
2514 p2p->cfg->model_name = os_strdup(model_name);
2515 if (p2p->cfg->model_name == NULL)
2516 return -1;
2517 }
2518
2519 return 0;
2520 }
2521
2522
2523 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2524 {
2525 os_free(p2p->cfg->model_number);
2526 p2p->cfg->model_number = NULL;
2527 if (model_number) {
2528 p2p->cfg->model_number = os_strdup(model_number);
2529 if (p2p->cfg->model_number == NULL)
2530 return -1;
2531 }
2532
2533 return 0;
2534 }
2535
2536
2537 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2538 {
2539 os_free(p2p->cfg->serial_number);
2540 p2p->cfg->serial_number = NULL;
2541 if (serial_number) {
2542 p2p->cfg->serial_number = os_strdup(serial_number);
2543 if (p2p->cfg->serial_number == NULL)
2544 return -1;
2545 }
2546
2547 return 0;
2548 }
2549
2550
2551 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2552 {
2553 p2p->cfg->config_methods = config_methods;
2554 }
2555
2556
2557 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2558 {
2559 os_memcpy(p2p->cfg->uuid, uuid, 16);
2560 }
2561
2562
2563 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2564 {
2565 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2566 return 0;
2567 }
2568
2569
2570 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2571 size_t num_dev_types)
2572 {
2573 if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2574 num_dev_types = P2P_SEC_DEVICE_TYPES;
2575 p2p->cfg->num_sec_dev_types = num_dev_types;
2576 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2577 return 0;
2578 }
2579
2580
2581 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2582 {
2583 int i;
2584
2585 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2586 wpabuf_free(p2p->wps_vendor_ext[i]);
2587 p2p->wps_vendor_ext[i] = NULL;
2588 }
2589 }
2590
2591
2592 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2593 const struct wpabuf *vendor_ext)
2594 {
2595 int i;
2596
2597 if (vendor_ext == NULL)
2598 return -1;
2599
2600 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2601 if (p2p->wps_vendor_ext[i] == NULL)
2602 break;
2603 }
2604 if (i >= P2P_MAX_WPS_VENDOR_EXT)
2605 return -1;
2606
2607 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2608 if (p2p->wps_vendor_ext[i] == NULL)
2609 return -1;
2610
2611 return 0;
2612 }
2613
2614
2615 int p2p_set_country(struct p2p_data *p2p, const char *country)
2616 {
2617 os_memcpy(p2p->cfg->country, country, 3);
2618 return 0;
2619 }
2620
2621
2622 void p2p_continue_find(struct p2p_data *p2p)
2623 {
2624 struct p2p_device *dev;
2625 p2p_set_state(p2p, P2P_SEARCH);
2626 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2627 if (dev->flags & P2P_DEV_SD_SCHEDULE) {
2628 if (p2p_start_sd(p2p, dev) == 0)
2629 return;
2630 else
2631 break;
2632 } else if (dev->req_config_methods &&
2633 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2634 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2635 MACSTR " (config methods 0x%x)",
2636 MAC2STR(dev->info.p2p_device_addr),
2637 dev->req_config_methods);
2638 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2639 return;
2640 }
2641 }
2642
2643 p2p_listen_in_find(p2p, 1);
2644 }
2645
2646
2647 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2648 {
2649 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
2650 success);
2651 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2652
2653 if (!success) {
2654 if (p2p->sd_peer) {
2655 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
2656 p2p->sd_peer = NULL;
2657 }
2658 p2p_continue_find(p2p);
2659 return;
2660 }
2661
2662 if (p2p->sd_peer == NULL) {
2663 p2p_dbg(p2p, "No SD peer entry known");
2664 p2p_continue_find(p2p);
2665 return;
2666 }
2667
2668 /* Wait for response from the peer */
2669 p2p_set_state(p2p, P2P_SD_DURING_FIND);
2670 p2p_set_timeout(p2p, 0, 200000);
2671 }
2672
2673
2674 /**
2675 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2676 * @p2p: P2P module context from p2p_init()
2677 */
2678 static void p2p_retry_pd(struct p2p_data *p2p)
2679 {
2680 struct p2p_device *dev;
2681
2682 if (p2p->state != P2P_IDLE)
2683 return;
2684
2685 /*
2686 * Retry the prov disc req attempt only for the peer that the user had
2687 * requested.
2688 */
2689
2690 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2691 if (os_memcmp(p2p->pending_pd_devaddr,
2692 dev->info.p2p_device_addr, ETH_ALEN) != 0)
2693 continue;
2694 if (!dev->req_config_methods)
2695 continue;
2696
2697 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2698 MACSTR " (config methods 0x%x)",
2699 MAC2STR(dev->info.p2p_device_addr),
2700 dev->req_config_methods);
2701 p2p_send_prov_disc_req(p2p, dev,
2702 dev->flags & P2P_DEV_PD_FOR_JOIN,
2703 p2p->pd_force_freq);
2704 return;
2705 }
2706 }
2707
2708
2709 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2710 {
2711 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
2712 success);
2713
2714 /*
2715 * Postpone resetting the pending action state till after we actually
2716 * time out. This allows us to take some action like notifying any
2717 * interested parties about no response to the request.
2718 *
2719 * When the timer (below) goes off we check in IDLE, SEARCH, or
2720 * LISTEN_ONLY state, which are the only allowed states to issue a PD
2721 * requests in, if this was still pending and then raise notification.
2722 */
2723
2724 if (!success) {
2725 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2726
2727 if (p2p->user_initiated_pd &&
2728 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2729 {
2730 /* Retry request from timeout to avoid busy loops */
2731 p2p->pending_action_state = P2P_PENDING_PD;
2732 p2p_set_timeout(p2p, 0, 50000);
2733 } else if (p2p->state != P2P_IDLE)
2734 p2p_continue_find(p2p);
2735 else if (p2p->user_initiated_pd) {
2736 p2p->pending_action_state = P2P_PENDING_PD;
2737 p2p_set_timeout(p2p, 0, 300000);
2738 }
2739 return;
2740 }
2741
2742 /*
2743 * This postponing, of resetting pending_action_state, needs to be
2744 * done only for user initiated PD requests and not internal ones.
2745 */
2746 if (p2p->user_initiated_pd)
2747 p2p->pending_action_state = P2P_PENDING_PD;
2748 else
2749 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2750
2751 /* Wait for response from the peer */
2752 if (p2p->state == P2P_SEARCH)
2753 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2754 p2p_set_timeout(p2p, 0, 200000);
2755 }
2756
2757
2758 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2759 struct os_reltime *rx_time, int level, const u8 *ies,
2760 size_t ies_len)
2761 {
2762 if (os_reltime_before(rx_time, &p2p->find_start)) {
2763 /*
2764 * The driver may have cached (e.g., in cfg80211 BSS table) the
2765 * scan results for relatively long time. To avoid reporting
2766 * stale information, update P2P peers only based on results
2767 * that have based on frames received after the last p2p_find
2768 * operation was started.
2769 */
2770 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
2771 " (rx_time=%u.%06u)",
2772 MAC2STR(bssid), (unsigned int) rx_time->sec,
2773 (unsigned int) rx_time->usec);
2774 return 0;
2775 }
2776
2777 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
2778
2779 return 0;
2780 }
2781
2782
2783 void p2p_scan_res_handled(struct p2p_data *p2p)
2784 {
2785 if (!p2p->p2p_scan_running) {
2786 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
2787 }
2788 p2p->p2p_scan_running = 0;
2789 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2790
2791 if (p2p_run_after_scan(p2p))
2792 return;
2793 if (p2p->state == P2P_SEARCH)
2794 p2p_continue_find(p2p);
2795 }
2796
2797
2798 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2799 {
2800 u8 *len;
2801
2802 #ifdef CONFIG_WIFI_DISPLAY
2803 if (p2p->wfd_ie_probe_req)
2804 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
2805 #endif /* CONFIG_WIFI_DISPLAY */
2806
2807 len = p2p_buf_add_ie_hdr(ies);
2808 p2p_buf_add_capability(ies, p2p->dev_capab &
2809 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2810 if (dev_id)
2811 p2p_buf_add_device_id(ies, dev_id);
2812 if (p2p->cfg->reg_class && p2p->cfg->channel)
2813 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
2814 p2p->cfg->reg_class,
2815 p2p->cfg->channel);
2816 if (p2p->ext_listen_interval)
2817 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
2818 p2p->ext_listen_interval);
2819 /* TODO: p2p_buf_add_operating_channel() if GO */
2820 p2p_buf_update_ie_hdr(ies, len);
2821 }
2822
2823
2824 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
2825 {
2826 size_t len = 100;
2827
2828 #ifdef CONFIG_WIFI_DISPLAY
2829 if (p2p && p2p->wfd_ie_probe_req)
2830 len += wpabuf_len(p2p->wfd_ie_probe_req);
2831 #endif /* CONFIG_WIFI_DISPLAY */
2832
2833 return len;
2834 }
2835
2836
2837 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
2838 {
2839 return p2p_attr_text(p2p_ie, buf, end);
2840 }
2841
2842
2843 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
2844 {
2845 struct p2p_device *dev = p2p->go_neg_peer;
2846 int timeout;
2847
2848 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
2849
2850 if (dev == NULL) {
2851 p2p_dbg(p2p, "No pending GO Negotiation");
2852 return;
2853 }
2854
2855 if (success) {
2856 if (dev->flags & P2P_DEV_USER_REJECTED) {
2857 p2p_set_state(p2p, P2P_IDLE);
2858 return;
2859 }
2860 } else if (dev->go_neg_req_sent) {
2861 /* Cancel the increment from p2p_connect_send() on failure */
2862 dev->go_neg_req_sent--;
2863 }
2864
2865 if (!success &&
2866 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
2867 !is_zero_ether_addr(dev->member_in_go_dev)) {
2868 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
2869 MAC2STR(dev->info.p2p_device_addr));
2870 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2871 p2p_send_dev_disc_req(p2p, dev);
2872 return;
2873 }
2874
2875 /*
2876 * Use P2P find, if needed, to find the other device from its listen
2877 * channel.
2878 */
2879 p2p_set_state(p2p, P2P_CONNECT);
2880 timeout = success ? 500000 : 100000;
2881 if (!success && p2p->go_neg_peer &&
2882 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
2883 unsigned int r;
2884 /*
2885 * Peer is expected to wait our response and we will skip the
2886 * listen phase. Add some randomness to the wait time here to
2887 * make it less likely to hit cases where we could end up in
2888 * sync with peer not listening.
2889 */
2890 os_get_random((u8 *) &r, sizeof(r));
2891 timeout += r % 100000;
2892 }
2893 p2p_set_timeout(p2p, 0, timeout);
2894 }
2895
2896
2897 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
2898 {
2899 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
2900 success);
2901 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
2902 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
2903 return;
2904 }
2905 p2p_set_state(p2p, P2P_CONNECT);
2906 p2p_set_timeout(p2p, 0, 500000);
2907 }
2908
2909
2910 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
2911 const u8 *addr)
2912 {
2913 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
2914 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
2915 p2p_go_neg_failed(p2p, p2p->go_neg_peer,
2916 p2p->go_neg_peer->status);
2917 } else if (success) {
2918 struct p2p_device *dev;
2919 dev = p2p_get_device(p2p, addr);
2920 if (dev &&
2921 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
2922 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
2923 }
2924 }
2925
2926
2927 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
2928 enum p2p_send_action_result result)
2929 {
2930 struct p2p_device *dev;
2931
2932 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
2933 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2934 if (result == P2P_SEND_ACTION_FAILED) {
2935 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
2936 return;
2937 }
2938 if (result == P2P_SEND_ACTION_NO_ACK) {
2939 /*
2940 * It looks like the TX status for GO Negotiation Confirm is
2941 * often showing failure even when the peer has actually
2942 * received the frame. Since the peer may change channels
2943 * immediately after having received the frame, we may not see
2944 * an Ack for retries, so just dropping a single frame may
2945 * trigger this. To allow the group formation to succeed if the
2946 * peer did indeed receive the frame, continue regardless of
2947 * the TX status.
2948 */
2949 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
2950 }
2951
2952 dev = p2p->go_neg_peer;
2953 if (dev == NULL)
2954 return;
2955
2956 p2p_go_complete(p2p, dev);
2957 }
2958
2959
2960 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
2961 const u8 *src, const u8 *bssid,
2962 enum p2p_send_action_result result)
2963 {
2964 enum p2p_pending_action_state state;
2965 int success;
2966
2967 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
2968 " src=" MACSTR " bssid=" MACSTR " result=%d",
2969 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
2970 MAC2STR(bssid), result);
2971 success = result == P2P_SEND_ACTION_SUCCESS;
2972 state = p2p->pending_action_state;
2973 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2974 switch (state) {
2975 case P2P_NO_PENDING_ACTION:
2976 if (p2p->after_scan_tx_in_progress) {
2977 p2p->after_scan_tx_in_progress = 0;
2978 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
2979 p2p_run_after_scan(p2p))
2980 break;
2981 if (p2p->state == P2P_SEARCH) {
2982 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
2983 p2p_continue_find(p2p);
2984 }
2985 }
2986 break;
2987 case P2P_PENDING_GO_NEG_REQUEST:
2988 p2p_go_neg_req_cb(p2p, success);
2989 break;
2990 case P2P_PENDING_GO_NEG_RESPONSE:
2991 p2p_go_neg_resp_cb(p2p, success);
2992 break;
2993 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
2994 p2p_go_neg_resp_failure_cb(p2p, success, dst);
2995 break;
2996 case P2P_PENDING_GO_NEG_CONFIRM:
2997 p2p_go_neg_conf_cb(p2p, result);
2998 break;
2999 case P2P_PENDING_SD:
3000 p2p_sd_cb(p2p, success);
3001 break;
3002 case P2P_PENDING_PD:
3003 p2p_prov_disc_cb(p2p, success);
3004 break;
3005 case P2P_PENDING_INVITATION_REQUEST:
3006 p2p_invitation_req_cb(p2p, success);
3007 break;
3008 case P2P_PENDING_INVITATION_RESPONSE:
3009 p2p_invitation_resp_cb(p2p, success);
3010 break;
3011 case P2P_PENDING_DEV_DISC_REQUEST:
3012 p2p_dev_disc_req_cb(p2p, success);
3013 break;
3014 case P2P_PENDING_DEV_DISC_RESPONSE:
3015 p2p_dev_disc_resp_cb(p2p, success);
3016 break;
3017 case P2P_PENDING_GO_DISC_REQ:
3018 p2p_go_disc_req_cb(p2p, success);
3019 break;
3020 }
3021
3022 p2p->after_scan_tx_in_progress = 0;
3023 }
3024
3025
3026 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3027 unsigned int duration)
3028 {
3029 if (freq == p2p->pending_client_disc_freq) {
3030 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3031 p2p->pending_client_disc_freq = 0;
3032 return;
3033 }
3034
3035 if (freq != p2p->pending_listen_freq) {
3036 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3037 freq, duration, p2p->pending_listen_freq);
3038 return;
3039 }
3040
3041 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3042 p2p->pending_listen_sec, p2p->pending_listen_usec,
3043 p2p->pending_listen_freq);
3044 p2p->in_listen = 1;
3045 p2p->drv_in_listen = freq;
3046 if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3047 /*
3048 * Add 20 msec extra wait to avoid race condition with driver
3049 * remain-on-channel end event, i.e., give driver more time to
3050 * complete the operation before our timeout expires.
3051 */
3052 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3053 p2p->pending_listen_usec + 20000);
3054 }
3055
3056 p2p->pending_listen_freq = 0;
3057 }
3058
3059
3060 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3061 {
3062 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3063 p2p->drv_in_listen = 0;
3064 if (p2p->in_listen)
3065 return 0; /* Internal timeout will trigger the next step */
3066
3067 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3068 if (p2p->go_neg_peer->connect_reqs >= 120) {
3069 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3070 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3071 return 0;
3072 }
3073
3074 p2p_set_state(p2p, P2P_CONNECT);
3075 p2p_connect_send(p2p, p2p->go_neg_peer);
3076 return 1;
3077 } else if (p2p->state == P2P_SEARCH) {
3078 if (p2p->p2p_scan_running) {
3079 /*
3080 * Search is already in progress. This can happen if
3081 * an Action frame RX is reported immediately after
3082 * the end of a remain-on-channel operation and the
3083 * response frame to that is sent using an offchannel
3084 * operation while in p2p_find. Avoid an attempt to
3085 * restart a scan here.
3086 */
3087 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3088 return 1;
3089 }
3090 if (p2p->pending_listen_freq) {
3091 /*
3092 * Better wait a bit if the driver is unable to start
3093 * offchannel operation for some reason. p2p_search()
3094 * will be started from internal timeout.
3095 */
3096 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3097 p2p_set_timeout(p2p, 0, 100000);
3098 return 1;
3099 }
3100 if (p2p->search_delay) {
3101 p2p_dbg(p2p, "Delay search operation by %u ms",
3102 p2p->search_delay);
3103 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3104 (p2p->search_delay % 1000) * 1000);
3105 return 1;
3106 }
3107 p2p_search(p2p);
3108 return 1;
3109 }
3110
3111 return 0;
3112 }
3113
3114
3115 static void p2p_timeout_connect(struct p2p_data *p2p)
3116 {
3117 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3118 if (p2p->go_neg_peer &&
3119 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3120 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3121 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3122 return;
3123 }
3124 if (p2p->go_neg_peer &&
3125 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3126 p2p->go_neg_peer->connect_reqs < 120) {
3127 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3128 p2p_connect_send(p2p, p2p->go_neg_peer);
3129 return;
3130 }
3131
3132 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3133 p2p_listen_in_find(p2p, 0);
3134 }
3135
3136
3137 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3138 {
3139 if (p2p->go_neg_peer) {
3140 if (p2p->drv_in_listen) {
3141 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3142 return;
3143 }
3144
3145 if (p2p->go_neg_peer->connect_reqs >= 120) {
3146 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3147 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3148 return;
3149 }
3150
3151 p2p_set_state(p2p, P2P_CONNECT);
3152 p2p_connect_send(p2p, p2p->go_neg_peer);
3153 } else
3154 p2p_set_state(p2p, P2P_IDLE);
3155 }
3156
3157
3158 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3159 {
3160 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3161
3162 if (p2p->cfg->is_concurrent_session_active &&
3163 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3164 p2p_set_timeout(p2p, 0, 500000);
3165 else
3166 p2p_set_timeout(p2p, 0, 200000);
3167 }
3168
3169
3170 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3171 {
3172 struct p2p_device *dev = p2p->go_neg_peer;
3173
3174 if (dev == NULL) {
3175 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3176 return;
3177 }
3178
3179 dev->wait_count++;
3180 if (dev->wait_count >= 120) {
3181 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation");
3182 p2p_go_neg_failed(p2p, dev, -1);
3183 return;
3184 }
3185
3186 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3187 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3188 p2p_listen_in_find(p2p, 0);
3189 }
3190
3191
3192 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3193 {
3194 p2p_dbg(p2p, "Service Discovery Query timeout");
3195 if (p2p->sd_peer) {
3196 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3197 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
3198 p2p->sd_peer = NULL;
3199 }
3200 p2p_continue_find(p2p);
3201 }
3202
3203
3204 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3205 {
3206 p2p_dbg(p2p, "Provision Discovery Request timeout");
3207 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3208 p2p_continue_find(p2p);
3209 }
3210
3211
3212 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3213 {
3214 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3215
3216 /*
3217 * For user initiated PD requests that we have not gotten any responses
3218 * for while in IDLE state, we retry them a couple of times before
3219 * giving up.
3220 */
3221 if (!p2p->user_initiated_pd)
3222 return;
3223
3224 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3225
3226 if (p2p->pd_retries) {
3227 p2p->pd_retries--;
3228 p2p_retry_pd(p2p);
3229 } else {
3230 struct p2p_device *dev;
3231 int for_join = 0;
3232
3233 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3234 if (os_memcmp(p2p->pending_pd_devaddr,
3235 dev->info.p2p_device_addr, ETH_ALEN) != 0)
3236 continue;
3237 if (dev->req_config_methods &&
3238 (dev->flags & P2P_DEV_PD_FOR_JOIN))
3239 for_join = 1;
3240 }
3241
3242 if (p2p->cfg->prov_disc_fail)
3243 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3244 p2p->pending_pd_devaddr,
3245 for_join ?
3246 P2P_PROV_DISC_TIMEOUT_JOIN :
3247 P2P_PROV_DISC_TIMEOUT);
3248 p2p_reset_pending_pd(p2p);
3249 }
3250 }
3251
3252
3253 static void p2p_timeout_invite(struct p2p_data *p2p)
3254 {
3255 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3256 p2p_set_state(p2p, P2P_INVITE_LISTEN);
3257 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3258 /*
3259 * Better remain on operating channel instead of listen channel
3260 * when running a group.
3261 */
3262 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3263 p2p_set_timeout(p2p, 0, 100000);
3264 return;
3265 }
3266 p2p_listen_in_find(p2p, 0);
3267 }
3268
3269
3270 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3271 {
3272 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3273 p2p_set_state(p2p, P2P_INVITE);
3274 p2p_invite_send(p2p, p2p->invite_peer,
3275 p2p->invite_go_dev_addr);
3276 } else {
3277 if (p2p->invite_peer) {
3278 p2p_dbg(p2p, "Invitation Request retry limit reached");
3279 if (p2p->cfg->invitation_result)
3280 p2p->cfg->invitation_result(
3281 p2p->cfg->cb_ctx, -1, NULL, NULL,
3282 p2p->invite_peer->info.p2p_device_addr,
3283 0);
3284 }
3285 p2p_set_state(p2p, P2P_IDLE);
3286 }
3287 }
3288
3289
3290 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3291 {
3292 struct p2p_data *p2p = eloop_ctx;
3293
3294 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3295
3296 p2p->in_listen = 0;
3297
3298 switch (p2p->state) {
3299 case P2P_IDLE:
3300 /* Check if we timed out waiting for PD req */
3301 if (p2p->pending_action_state == P2P_PENDING_PD)
3302 p2p_timeout_prov_disc_req(p2p);
3303 break;
3304 case P2P_SEARCH:
3305 /* Check if we timed out waiting for PD req */
3306 if (p2p->pending_action_state == P2P_PENDING_PD)
3307 p2p_timeout_prov_disc_req(p2p);
3308 if (p2p->search_delay && !p2p->in_search_delay) {
3309 p2p_dbg(p2p, "Delay search operation by %u ms",
3310 p2p->search_delay);
3311 p2p->in_search_delay = 1;
3312 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3313 (p2p->search_delay % 1000) * 1000);
3314 break;
3315 }
3316 p2p->in_search_delay = 0;
3317 p2p_search(p2p);
3318 break;
3319 case P2P_CONNECT:
3320 p2p_timeout_connect(p2p);
3321 break;
3322 case P2P_CONNECT_LISTEN:
3323 p2p_timeout_connect_listen(p2p);
3324 break;
3325 case P2P_GO_NEG:
3326 break;
3327 case P2P_LISTEN_ONLY:
3328 /* Check if we timed out waiting for PD req */
3329 if (p2p->pending_action_state == P2P_PENDING_PD)
3330 p2p_timeout_prov_disc_req(p2p);
3331
3332 if (p2p->ext_listen_only) {
3333 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3334 p2p->ext_listen_only = 0;
3335 p2p_set_state(p2p, P2P_IDLE);
3336 }
3337 break;
3338 case P2P_WAIT_PEER_CONNECT:
3339 p2p_timeout_wait_peer_connect(p2p);
3340 break;
3341 case P2P_WAIT_PEER_IDLE:
3342 p2p_timeout_wait_peer_idle(p2p);
3343 break;
3344 case P2P_SD_DURING_FIND:
3345 p2p_timeout_sd_during_find(p2p);
3346 break;
3347 case P2P_PROVISIONING:
3348 break;
3349 case P2P_PD_DURING_FIND:
3350 p2p_timeout_prov_disc_during_find(p2p);
3351 break;
3352 case P2P_INVITE:
3353 p2p_timeout_invite(p2p);
3354 break;
3355 case P2P_INVITE_LISTEN:
3356 p2p_timeout_invite_listen(p2p);
3357 break;
3358 }
3359 }
3360
3361
3362 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3363 {
3364 struct p2p_device *dev;
3365
3366 dev = p2p_get_device(p2p, peer_addr);
3367 p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3368 MACSTR, MAC2STR(peer_addr));
3369 if (dev == NULL) {
3370 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3371 return -1;
3372 }
3373 dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3374 dev->flags |= P2P_DEV_USER_REJECTED;
3375 return 0;
3376 }
3377
3378
3379 const char * p2p_wps_method_text(enum p2p_wps_method method)
3380 {
3381 switch (method) {
3382 case WPS_NOT_READY:
3383 return "not-ready";
3384 case WPS_PIN_DISPLAY:
3385 return "Display";
3386 case WPS_PIN_KEYPAD:
3387 return "Keypad";
3388 case WPS_PBC:
3389 return "PBC";
3390 case WPS_NFC:
3391 return "NFC";
3392 }
3393
3394 return "??";
3395 }
3396
3397
3398 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3399 {
3400 switch (go_state) {
3401 case UNKNOWN_GO:
3402 return "unknown";
3403 case LOCAL_GO:
3404 return "local";
3405 case REMOTE_GO:
3406 return "remote";
3407 }
3408
3409 return "??";
3410 }
3411
3412
3413 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3414 const u8 *addr, int next)
3415 {
3416 struct p2p_device *dev;
3417
3418 if (addr)
3419 dev = p2p_get_device(p2p, addr);
3420 else
3421 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3422
3423 if (dev && next) {
3424 dev = dl_list_first(&dev->list, struct p2p_device, list);
3425 if (&dev->list == &p2p->devices)
3426 dev = NULL;
3427 }
3428
3429 if (dev == NULL)
3430 return NULL;
3431
3432 return &dev->info;
3433 }
3434
3435
3436 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3437 char *buf, size_t buflen)
3438 {
3439 struct p2p_device *dev;
3440 int res;
3441 char *pos, *end;
3442 struct os_reltime now;
3443
3444 if (info == NULL)
3445 return -1;
3446
3447 dev = (struct p2p_device *) (((u8 *) info) -
3448 offsetof(struct p2p_device, info));
3449
3450 pos = buf;
3451 end = buf + buflen;
3452
3453 os_get_reltime(&now);
3454 res = os_snprintf(pos, end - pos,
3455 "age=%d\n"
3456 "listen_freq=%d\n"
3457 "wps_method=%s\n"
3458 "interface_addr=" MACSTR "\n"
3459 "member_in_go_dev=" MACSTR "\n"
3460 "member_in_go_iface=" MACSTR "\n"
3461 "go_neg_req_sent=%d\n"
3462 "go_state=%s\n"
3463 "dialog_token=%u\n"
3464 "intended_addr=" MACSTR "\n"
3465 "country=%c%c\n"
3466 "oper_freq=%d\n"
3467 "req_config_methods=0x%x\n"
3468 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3469 "status=%d\n"
3470 "wait_count=%u\n"
3471 "invitation_reqs=%u\n",
3472 (int) (now.sec - dev->last_seen.sec),
3473 dev->listen_freq,
3474 p2p_wps_method_text(dev->wps_method),
3475 MAC2STR(dev->interface_addr),
3476 MAC2STR(dev->member_in_go_dev),
3477 MAC2STR(dev->member_in_go_iface),
3478 dev->go_neg_req_sent,
3479 p2p_go_state_text(dev->go_state),
3480 dev->dialog_token,
3481 MAC2STR(dev->intended_addr),
3482 dev->country[0] ? dev->country[0] : '_',
3483 dev->country[1] ? dev->country[1] : '_',
3484 dev->oper_freq,
3485 dev->req_config_methods,
3486 dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3487 "[PROBE_REQ_ONLY]" : "",
3488 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3489 dev->flags & P2P_DEV_NOT_YET_READY ?
3490 "[NOT_YET_READY]" : "",
3491 dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "",
3492 dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" :
3493 "",
3494 dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3495 "[PD_PEER_DISPLAY]" : "",
3496 dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3497 "[PD_PEER_KEYPAD]" : "",
3498 dev->flags & P2P_DEV_USER_REJECTED ?
3499 "[USER_REJECTED]" : "",
3500 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3501 "[PEER_WAITING_RESPONSE]" : "",
3502 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3503 "[PREFER_PERSISTENT_GROUP]" : "",
3504 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3505 "[WAIT_GO_NEG_RESPONSE]" : "",
3506 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3507 "[WAIT_GO_NEG_CONFIRM]" : "",
3508 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3509 "[GROUP_CLIENT_ONLY]" : "",
3510 dev->flags & P2P_DEV_FORCE_FREQ ?
3511 "[FORCE_FREQ]" : "",
3512 dev->flags & P2P_DEV_PD_FOR_JOIN ?
3513 "[PD_FOR_JOIN]" : "",
3514 dev->status,
3515 dev->wait_count,
3516 dev->invitation_reqs);
3517 if (res < 0 || res >= end - pos)
3518 return pos - buf;
3519 pos += res;
3520
3521 if (dev->ext_listen_period) {
3522 res = os_snprintf(pos, end - pos,
3523 "ext_listen_period=%u\n"
3524 "ext_listen_interval=%u\n",
3525 dev->ext_listen_period,
3526 dev->ext_listen_interval);
3527 if (res < 0 || res >= end - pos)
3528 return pos - buf;
3529 pos += res;
3530 }
3531
3532 if (dev->oper_ssid_len) {
3533 res = os_snprintf(pos, end - pos,
3534 "oper_ssid=%s\n",
3535 wpa_ssid_txt(dev->oper_ssid,
3536 dev->oper_ssid_len));
3537 if (res < 0 || res >= end - pos)
3538 return pos - buf;
3539 pos += res;
3540 }
3541
3542 #ifdef CONFIG_WIFI_DISPLAY
3543 if (dev->info.wfd_subelems) {
3544 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3545 if (res < 0 || res >= end - pos)
3546 return pos - buf;
3547 pos += res;
3548
3549 pos += wpa_snprintf_hex(pos, end - pos,
3550 wpabuf_head(dev->info.wfd_subelems),
3551 wpabuf_len(dev->info.wfd_subelems));
3552
3553 res = os_snprintf(pos, end - pos, "\n");
3554 if (res < 0 || res >= end - pos)
3555 return pos - buf;
3556 pos += res;
3557 }
3558 #endif /* CONFIG_WIFI_DISPLAY */
3559
3560 return pos - buf;
3561 }
3562
3563
3564 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3565 {
3566 return p2p_get_device(p2p, addr) != NULL;
3567 }
3568
3569
3570 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3571 {
3572 if (enabled) {
3573 p2p_dbg(p2p, "Client discoverability enabled");
3574 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3575 } else {
3576 p2p_dbg(p2p, "Client discoverability disabled");
3577 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3578 }
3579 }
3580
3581
3582 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3583 u32 duration2, u32 interval2)
3584 {
3585 struct wpabuf *req;
3586 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3587 u8 *len;
3588
3589 req = wpabuf_alloc(100);
3590 if (req == NULL)
3591 return NULL;
3592
3593 if (duration1 || interval1) {
3594 os_memset(&desc1, 0, sizeof(desc1));
3595 desc1.count_type = 1;
3596 desc1.duration = duration1;
3597 desc1.interval = interval1;
3598 ptr1 = &desc1;
3599
3600 if (duration2 || interval2) {
3601 os_memset(&desc2, 0, sizeof(desc2));
3602 desc2.count_type = 2;
3603 desc2.duration = duration2;
3604 desc2.interval = interval2;
3605 ptr2 = &desc2;
3606 }
3607 }
3608
3609 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3610 len = p2p_buf_add_ie_hdr(req);
3611 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3612 p2p_buf_update_ie_hdr(req, len);
3613
3614 return req;
3615 }
3616
3617
3618 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3619 const u8 *own_interface_addr, unsigned int freq,
3620 u32 duration1, u32 interval1, u32 duration2,
3621 u32 interval2)
3622 {
3623 struct wpabuf *req;
3624
3625 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
3626 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
3627 "dur2=%u int2=%u",
3628 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3629 freq, duration1, interval1, duration2, interval2);
3630
3631 req = p2p_build_presence_req(duration1, interval1, duration2,
3632 interval2);
3633 if (req == NULL)
3634 return -1;
3635
3636 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3637 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3638 go_interface_addr,
3639 wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3640 p2p_dbg(p2p, "Failed to send Action frame");
3641 }
3642 wpabuf_free(req);
3643
3644 return 0;
3645 }
3646
3647
3648 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3649 size_t noa_len, u8 dialog_token)
3650 {
3651 struct wpabuf *resp;
3652 u8 *len;
3653
3654 resp = wpabuf_alloc(100 + noa_len);
3655 if (resp == NULL)
3656 return NULL;
3657
3658 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3659 len = p2p_buf_add_ie_hdr(resp);
3660 p2p_buf_add_status(resp, status);
3661 if (noa) {
3662 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3663 wpabuf_put_le16(resp, noa_len);
3664 wpabuf_put_data(resp, noa, noa_len);
3665 } else
3666 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3667 p2p_buf_update_ie_hdr(resp, len);
3668
3669 return resp;
3670 }
3671
3672
3673 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3674 const u8 *sa, const u8 *data, size_t len,
3675 int rx_freq)
3676 {
3677 struct p2p_message msg;
3678 u8 status;
3679 struct wpabuf *resp;
3680 size_t g;
3681 struct p2p_group *group = NULL;
3682 int parsed = 0;
3683 u8 noa[50];
3684 int noa_len;
3685
3686 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
3687
3688 for (g = 0; g < p2p->num_groups; g++) {
3689 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3690 ETH_ALEN) == 0) {
3691 group = p2p->groups[g];
3692 break;
3693 }
3694 }
3695 if (group == NULL) {
3696 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
3697 MACSTR, MAC2STR(da));
3698 return;
3699 }
3700
3701 if (p2p_parse(data, len, &msg) < 0) {
3702 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
3703 status = P2P_SC_FAIL_INVALID_PARAMS;
3704 goto fail;
3705 }
3706 parsed = 1;
3707
3708 if (msg.noa == NULL) {
3709 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
3710 status = P2P_SC_FAIL_INVALID_PARAMS;
3711 goto fail;
3712 }
3713
3714 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3715
3716 fail:
3717 if (p2p->cfg->get_noa)
3718 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3719 sizeof(noa));
3720 else
3721 noa_len = -1;
3722 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3723 noa_len > 0 ? noa_len : 0,
3724 msg.dialog_token);
3725 if (parsed)
3726 p2p_parse_free(&msg);
3727 if (resp == NULL)
3728 return;
3729
3730 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3731 if (p2p_send_action(p2p, rx_freq, sa, da, da,
3732 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3733 p2p_dbg(p2p, "Failed to send Action frame");
3734 }
3735 wpabuf_free(resp);
3736 }
3737
3738
3739 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3740 const u8 *sa, const u8 *data, size_t len)
3741 {
3742 struct p2p_message msg;
3743
3744 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
3745
3746 if (p2p_parse(data, len, &msg) < 0) {
3747 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
3748 return;
3749 }
3750
3751 if (msg.status == NULL || msg.noa == NULL) {
3752 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
3753 p2p_parse_free(&msg);
3754 return;
3755 }
3756
3757 if (p2p->cfg->presence_resp) {
3758 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
3759 msg.noa, msg.noa_len);
3760 }
3761
3762 if (*msg.status) {
3763 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
3764 *msg.status);
3765 p2p_parse_free(&msg);
3766 return;
3767 }
3768
3769 p2p_dbg(p2p, "P2P Presence Request was accepted");
3770 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
3771 msg.noa, msg.noa_len);
3772 /* TODO: process NoA */
3773 p2p_parse_free(&msg);
3774 }
3775
3776
3777 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
3778 {
3779 struct p2p_data *p2p = eloop_ctx;
3780
3781 if (p2p->ext_listen_interval) {
3782 /* Schedule next extended listen timeout */
3783 eloop_register_timeout(p2p->ext_listen_interval_sec,
3784 p2p->ext_listen_interval_usec,
3785 p2p_ext_listen_timeout, p2p, NULL);
3786 }
3787
3788 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
3789 /*
3790 * This should not really happen, but it looks like the Listen
3791 * command may fail is something else (e.g., a scan) was
3792 * running at an inconvenient time. As a workaround, allow new
3793 * Extended Listen operation to be started.
3794 */
3795 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
3796 p2p->ext_listen_only = 0;
3797 p2p_set_state(p2p, P2P_IDLE);
3798 }
3799
3800 if (p2p->state != P2P_IDLE) {
3801 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
3802 return;
3803 }
3804
3805 p2p_dbg(p2p, "Extended Listen timeout");
3806 p2p->ext_listen_only = 1;
3807 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
3808 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
3809 p2p->ext_listen_only = 0;
3810 }
3811 }
3812
3813
3814 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
3815 unsigned int interval)
3816 {
3817 if (period > 65535 || interval > 65535 || period > interval ||
3818 (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
3819 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
3820 period, interval);
3821 return -1;
3822 }
3823
3824 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
3825
3826 if (interval == 0) {
3827 p2p_dbg(p2p, "Disabling Extended Listen Timing");
3828 p2p->ext_listen_period = 0;
3829 p2p->ext_listen_interval = 0;
3830 return 0;
3831 }
3832
3833 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
3834 period, interval);
3835 p2p->ext_listen_period = period;
3836 p2p->ext_listen_interval = interval;
3837 p2p->ext_listen_interval_sec = interval / 1000;
3838 p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
3839
3840 eloop_register_timeout(p2p->ext_listen_interval_sec,
3841 p2p->ext_listen_interval_usec,
3842 p2p_ext_listen_timeout, p2p, NULL);
3843
3844 return 0;
3845 }
3846
3847
3848 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3849 const u8 *ie, size_t ie_len)
3850 {
3851 struct p2p_message msg;
3852
3853 if (bssid == NULL || ie == NULL)
3854 return;
3855
3856 os_memset(&msg, 0, sizeof(msg));
3857 if (p2p_parse_ies(ie, ie_len, &msg))
3858 return;
3859 if (msg.minor_reason_code == NULL)
3860 return;
3861
3862 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
3863 " reason_code=%u minor_reason_code=%u",
3864 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3865
3866 p2p_parse_free(&msg);
3867 }
3868
3869
3870 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3871 const u8 *ie, size_t ie_len)
3872 {
3873 struct p2p_message msg;
3874
3875 if (bssid == NULL || ie == NULL)
3876 return;
3877
3878 os_memset(&msg, 0, sizeof(msg));
3879 if (p2p_parse_ies(ie, ie_len, &msg))
3880 return;
3881 if (msg.minor_reason_code == NULL)
3882 return;
3883
3884 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
3885 " reason_code=%u minor_reason_code=%u",
3886 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3887
3888 p2p_parse_free(&msg);
3889 }
3890
3891
3892 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
3893 {
3894 if (enabled) {
3895 p2p_dbg(p2p, "Managed P2P Device operations enabled");
3896 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
3897 } else {
3898 p2p_dbg(p2p, "Managed P2P Device operations disabled");
3899 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
3900 }
3901 }
3902
3903
3904 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel)
3905 {
3906 if (p2p_channel_to_freq(reg_class, channel) < 0)
3907 return -1;
3908
3909 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
3910 reg_class, channel);
3911 p2p->cfg->reg_class = reg_class;
3912 p2p->cfg->channel = channel;
3913
3914 return 0;
3915 }
3916
3917
3918 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
3919 {
3920 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
3921 if (postfix == NULL) {
3922 p2p->cfg->ssid_postfix_len = 0;
3923 return 0;
3924 }
3925 if (len > sizeof(p2p->cfg->ssid_postfix))
3926 return -1;
3927 os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
3928 p2p->cfg->ssid_postfix_len = len;
3929 return 0;
3930 }
3931
3932
3933 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
3934 int cfg_op_channel)
3935 {
3936 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
3937 return -1;
3938
3939 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
3940 op_reg_class, op_channel);
3941 p2p->cfg->op_reg_class = op_reg_class;
3942 p2p->cfg->op_channel = op_channel;
3943 p2p->cfg->cfg_op_channel = cfg_op_channel;
3944 return 0;
3945 }
3946
3947
3948 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
3949 const struct p2p_channel *pref_chan)
3950 {
3951 struct p2p_channel *n;
3952
3953 if (pref_chan) {
3954 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
3955 if (n == NULL)
3956 return -1;
3957 os_memcpy(n, pref_chan,
3958 num_pref_chan * sizeof(struct p2p_channel));
3959 } else
3960 n = NULL;
3961
3962 os_free(p2p->cfg->pref_chan);
3963 p2p->cfg->pref_chan = n;
3964 p2p->cfg->num_pref_chan = num_pref_chan;
3965
3966 return 0;
3967 }
3968
3969
3970 int p2p_set_no_go_freq(struct p2p_data *p2p,
3971 const struct wpa_freq_range_list *list)
3972 {
3973 struct wpa_freq_range *tmp;
3974
3975 if (list == NULL || list->num == 0) {
3976 os_free(p2p->no_go_freq.range);
3977 p2p->no_go_freq.range = NULL;
3978 p2p->no_go_freq.num = 0;
3979 return 0;
3980 }
3981
3982 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
3983 if (tmp == NULL)
3984 return -1;
3985 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
3986 os_free(p2p->no_go_freq.range);
3987 p2p->no_go_freq.range = tmp;
3988 p2p->no_go_freq.num = list->num;
3989 p2p_dbg(p2p, "Updated no GO chan list");
3990
3991 return 0;
3992 }
3993
3994
3995 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
3996 u8 *iface_addr)
3997 {
3998 struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
3999 if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4000 return -1;
4001 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4002 return 0;
4003 }
4004
4005
4006 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4007 u8 *dev_addr)
4008 {
4009 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4010 if (dev == NULL)
4011 return -1;
4012 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4013 return 0;
4014 }
4015
4016
4017 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4018 {
4019 os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4020 if (is_zero_ether_addr(p2p->peer_filter))
4021 p2p_dbg(p2p, "Disable peer filter");
4022 else
4023 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4024 MAC2STR(p2p->peer_filter));
4025 }
4026
4027
4028 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4029 {
4030 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4031 if (p2p->cross_connect == enabled)
4032 return;
4033 p2p->cross_connect = enabled;
4034 /* TODO: may need to tear down any action group where we are GO(?) */
4035 }
4036
4037
4038 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4039 {
4040 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4041 if (dev == NULL)
4042 return -1;
4043 if (dev->oper_freq <= 0)
4044 return -1;
4045 return dev->oper_freq;
4046 }
4047
4048
4049 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4050 {
4051 p2p_dbg(p2p, "Intra BSS distribution %s",
4052 enabled ? "enabled" : "disabled");
4053 p2p->cfg->p2p_intra_bss = enabled;
4054 }
4055
4056
4057 void p2p_update_channel_list(struct p2p_data *p2p,
4058 const struct p2p_channels *chan,
4059 const struct p2p_channels *cli_chan)
4060 {
4061 p2p_dbg(p2p, "Update channel list");
4062 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4063 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4064 os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4065 sizeof(struct p2p_channels));
4066 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4067 }
4068
4069
4070 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4071 const u8 *src, const u8 *bssid, const u8 *buf,
4072 size_t len, unsigned int wait_time)
4073 {
4074 if (p2p->p2p_scan_running) {
4075 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4076 if (p2p->after_scan_tx) {
4077 p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4078 os_free(p2p->after_scan_tx);
4079 }
4080 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4081 len);
4082 if (p2p->after_scan_tx == NULL)
4083 return -1;
4084 p2p->after_scan_tx->freq = freq;
4085 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4086 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4087 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4088 p2p->after_scan_tx->len = len;
4089 p2p->after_scan_tx->wait_time = wait_time;
4090 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4091 return 0;
4092 }
4093
4094 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4095 buf, len, wait_time);
4096 }
4097
4098
4099 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4100 int freq_overall)
4101 {
4102 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d",
4103 freq_24, freq_5, freq_overall);
4104 p2p->best_freq_24 = freq_24;
4105 p2p->best_freq_5 = freq_5;
4106 p2p->best_freq_overall = freq_overall;
4107 }
4108
4109
4110 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4111 {
4112 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4113 p2p->own_freq_preference = freq;
4114 }
4115
4116
4117 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4118 {
4119 if (p2p == NULL || p2p->go_neg_peer == NULL)
4120 return NULL;
4121 return p2p->go_neg_peer->info.p2p_device_addr;
4122 }
4123
4124
4125 const struct p2p_peer_info *
4126 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4127 {
4128 struct p2p_device *dev;
4129
4130 if (addr) {
4131 dev = p2p_get_device(p2p, addr);
4132 if (!dev)
4133 return NULL;
4134
4135 if (!next) {
4136 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4137 return NULL;
4138
4139 return &dev->info;
4140 } else {
4141 do {
4142 dev = dl_list_first(&dev->list,
4143 struct p2p_device,
4144 list);
4145 if (&dev->list == &p2p->devices)
4146 return NULL;
4147 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4148 }
4149 } else {
4150 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4151 if (!dev)
4152 return NULL;
4153 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4154 dev = dl_list_first(&dev->list,
4155 struct p2p_device,
4156 list);
4157 if (&dev->list == &p2p->devices)
4158 return NULL;
4159 }
4160 }
4161
4162 return &dev->info;
4163 }
4164
4165
4166 int p2p_in_progress(struct p2p_data *p2p)
4167 {
4168 if (p2p == NULL)
4169 return 0;
4170 if (p2p->state == P2P_SEARCH)
4171 return 2;
4172 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4173 }
4174
4175
4176 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4177 u8 client_timeout)
4178 {
4179 if (p2p) {
4180 p2p->go_timeout = go_timeout;
4181 p2p->client_timeout = client_timeout;
4182 }
4183 }
4184
4185
4186 #ifdef CONFIG_WIFI_DISPLAY
4187
4188 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4189 {
4190 size_t g;
4191 struct p2p_group *group;
4192
4193 for (g = 0; g < p2p->num_groups; g++) {
4194 group = p2p->groups[g];
4195 p2p_group_force_beacon_update_ies(group);
4196 }
4197 }
4198
4199
4200 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4201 {
4202 wpabuf_free(p2p->wfd_ie_beacon);
4203 p2p->wfd_ie_beacon = ie;
4204 p2p_update_wfd_ie_groups(p2p);
4205 return 0;
4206 }
4207
4208
4209 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4210 {
4211 wpabuf_free(p2p->wfd_ie_probe_req);
4212 p2p->wfd_ie_probe_req = ie;
4213 return 0;
4214 }
4215
4216
4217 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4218 {
4219 wpabuf_free(p2p->wfd_ie_probe_resp);
4220 p2p->wfd_ie_probe_resp = ie;
4221 p2p_update_wfd_ie_groups(p2p);
4222 return 0;
4223 }
4224
4225
4226 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4227 {
4228 wpabuf_free(p2p->wfd_ie_assoc_req);
4229 p2p->wfd_ie_assoc_req = ie;
4230 return 0;
4231 }
4232
4233
4234 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4235 {
4236 wpabuf_free(p2p->wfd_ie_invitation);
4237 p2p->wfd_ie_invitation = ie;
4238 return 0;
4239 }
4240
4241
4242 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4243 {
4244 wpabuf_free(p2p->wfd_ie_prov_disc_req);
4245 p2p->wfd_ie_prov_disc_req = ie;
4246 return 0;
4247 }
4248
4249
4250 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4251 {
4252 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4253 p2p->wfd_ie_prov_disc_resp = ie;
4254 return 0;
4255 }
4256
4257
4258 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4259 {
4260 wpabuf_free(p2p->wfd_ie_go_neg);
4261 p2p->wfd_ie_go_neg = ie;
4262 return 0;
4263 }
4264
4265
4266 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4267 {
4268 wpabuf_free(p2p->wfd_dev_info);
4269 if (elem) {
4270 p2p->wfd_dev_info = wpabuf_dup(elem);
4271 if (p2p->wfd_dev_info == NULL)
4272 return -1;
4273 } else
4274 p2p->wfd_dev_info = NULL;
4275
4276 return 0;
4277 }
4278
4279
4280 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4281 {
4282 wpabuf_free(p2p->wfd_assoc_bssid);
4283 if (elem) {
4284 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4285 if (p2p->wfd_assoc_bssid == NULL)
4286 return -1;
4287 } else
4288 p2p->wfd_assoc_bssid = NULL;
4289
4290 return 0;
4291 }
4292
4293
4294 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4295 const struct wpabuf *elem)
4296 {
4297 wpabuf_free(p2p->wfd_coupled_sink_info);
4298 if (elem) {
4299 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4300 if (p2p->wfd_coupled_sink_info == NULL)
4301 return -1;
4302 } else
4303 p2p->wfd_coupled_sink_info = NULL;
4304
4305 return 0;
4306 }
4307
4308 #endif /* CONFIG_WIFI_DISPLAY */
4309
4310
4311 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4312 int max_disc_tu)
4313 {
4314 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4315 return -1;
4316
4317 p2p->min_disc_int = min_disc_int;
4318 p2p->max_disc_int = max_disc_int;
4319 p2p->max_disc_tu = max_disc_tu;
4320 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4321 min_disc_int, max_disc_int, max_disc_tu);
4322
4323 return 0;
4324 }
4325
4326
4327 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4328 {
4329 va_list ap;
4330 char buf[500];
4331
4332 if (!p2p->cfg->debug_print)
4333 return;
4334
4335 va_start(ap, fmt);
4336 vsnprintf(buf, sizeof(buf), fmt, ap);
4337 buf[sizeof(buf) - 1] = '\0';
4338 va_end(ap);
4339 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4340 }
4341
4342
4343 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4344 {
4345 va_list ap;
4346 char buf[500];
4347
4348 if (!p2p->cfg->debug_print)
4349 return;
4350
4351 va_start(ap, fmt);
4352 vsnprintf(buf, sizeof(buf), fmt, ap);
4353 buf[sizeof(buf) - 1] = '\0';
4354 va_end(ap);
4355 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4356 }
4357
4358
4359 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4360 {
4361 va_list ap;
4362 char buf[500];
4363
4364 if (!p2p->cfg->debug_print)
4365 return;
4366
4367 va_start(ap, fmt);
4368 vsnprintf(buf, sizeof(buf), fmt, ap);
4369 buf[sizeof(buf) - 1] = '\0';
4370 va_end(ap);
4371 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4372 }
4373
4374
4375 #ifdef CONFIG_WPS_NFC
4376
4377 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p)
4378 {
4379 struct wpabuf *buf;
4380 u8 op_class, channel;
4381 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
4382
4383 buf = wpabuf_alloc(1000);
4384 if (buf == NULL)
4385 return NULL;
4386
4387 op_class = p2p->cfg->reg_class;
4388 channel = p2p->cfg->channel;
4389
4390 p2p_buf_add_capability(buf, p2p->dev_capab &
4391 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
4392 p2p_buf_add_device_info(buf, p2p, NULL);
4393
4394 if (p2p->num_groups > 0) {
4395 role = P2P_GO_IN_A_GROUP;
4396 p2p_freq_to_channel(p2p_group_get_freq(p2p->groups[0]),
4397 &op_class, &channel);
4398 }
4399
4400 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
4401 channel, role);
4402
4403 if (p2p->num_groups > 0) {
4404 /* Limit number of clients to avoid very long message */
4405 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
4406 p2p_group_buf_add_id(p2p->groups[0], buf);
4407 }
4408
4409 return buf;
4410 }
4411
4412
4413 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p)
4414 {
4415 return p2p_build_nfc_handover(p2p);
4416 }
4417
4418
4419 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p)
4420 {
4421 return p2p_build_nfc_handover(p2p);
4422 }
4423
4424
4425 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
4426 struct p2p_nfc_params *params)
4427 {
4428 struct p2p_message msg;
4429 struct p2p_device *dev;
4430 const u8 *p2p_dev_addr;
4431 int peer_go = 0;
4432
4433 params->next_step = NO_ACTION;
4434
4435 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
4436 params->p2p_attr, params->p2p_len, &msg)) {
4437 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
4438 p2p_parse_free(&msg);
4439 return -1;
4440 }
4441
4442 if (msg.p2p_device_addr)
4443 p2p_dev_addr = msg.p2p_device_addr;
4444 else if (msg.device_id)
4445 p2p_dev_addr = msg.device_id;
4446 else {
4447 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
4448 p2p_parse_free(&msg);
4449 return -1;
4450 }
4451
4452 if (msg.oob_dev_password) {
4453 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
4454 msg.oob_dev_password_len);
4455 params->oob_dev_pw_len = msg.oob_dev_password_len;
4456 }
4457
4458 dev = p2p_create_device(p2p, p2p_dev_addr);
4459 if (dev == NULL) {
4460 p2p_parse_free(&msg);
4461 return -1;
4462 }
4463
4464 params->peer = &dev->info;
4465
4466 os_get_reltime(&dev->last_seen);
4467 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
4468 p2p_copy_wps_info(p2p, dev, 0, &msg);
4469
4470 if (msg.oob_go_neg_channel) {
4471 int freq;
4472 if (msg.oob_go_neg_channel[3] == 0 &&
4473 msg.oob_go_neg_channel[4] == 0)
4474 freq = 0;
4475 else
4476 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
4477 msg.oob_go_neg_channel[4]);
4478 if (freq < 0) {
4479 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
4480 } else {
4481 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
4482 dev->oob_go_neg_freq = freq;
4483 }
4484
4485 if (!params->sel) {
4486 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
4487 p2p->cfg->channel);
4488 if (freq < 0) {
4489 p2p_dbg(p2p, "Own listen channel not known");
4490 return -1;
4491 }
4492 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz",
4493 freq);
4494 dev->oob_go_neg_freq = freq;
4495 }
4496
4497 if (msg.oob_go_neg_channel[5] == P2P_GO_IN_A_GROUP)
4498 peer_go = 1;
4499 }
4500
4501 p2p_parse_free(&msg);
4502
4503 if (dev->flags & P2P_DEV_USER_REJECTED) {
4504 p2p_dbg(p2p, "Do not report rejected device");
4505 return 0;
4506 }
4507
4508 if (!(dev->flags & P2P_DEV_REPORTED)) {
4509 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
4510 !(dev->flags & P2P_DEV_REPORTED_ONCE));
4511 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
4512 }
4513
4514 if (peer_go)
4515 params->next_step = JOIN_GROUP;
4516 else if (p2p->num_groups > 0)
4517 params->next_step = AUTH_JOIN;
4518 else if (params->sel)
4519 params->next_step = INIT_GO_NEG;
4520 else
4521 params->next_step = RESP_GO_NEG;
4522
4523 return 0;
4524 }
4525
4526 #endif /* CONFIG_WPS_NFC */
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