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P2PS: Add feature capability to PD events
[thirdparty/hostap.git] / src / p2p / p2p.c
1 /*
2 * Wi-Fi Direct - P2P module
3 * Copyright (c) 2009-2010, Atheros Communications
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/ieee802_11_common.h"
15 #include "common/wpa_ctrl.h"
16 #include "crypto/sha256.h"
17 #include "crypto/crypto.h"
18 #include "wps/wps_i.h"
19 #include "p2p_i.h"
20 #include "p2p.h"
21
22
23 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
24 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
25 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
26 const u8 *sa, const u8 *data, size_t len,
27 int rx_freq);
28 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
29 const u8 *sa, const u8 *data,
30 size_t len);
31 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
32 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
33
34
35 /*
36 * p2p_scan recovery timeout
37 *
38 * Many drivers are using 30 second timeout on scan results. Allow a bit larger
39 * timeout for this to avoid hitting P2P timeout unnecessarily.
40 */
41 #define P2P_SCAN_TIMEOUT 35
42
43 /**
44 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
45 * entries will be removed
46 */
47 #ifndef P2P_PEER_EXPIRATION_AGE
48 #define P2P_PEER_EXPIRATION_AGE 60
49 #endif /* P2P_PEER_EXPIRATION_AGE */
50
51
52 void p2p_expire_peers(struct p2p_data *p2p)
53 {
54 struct p2p_device *dev, *n;
55 struct os_reltime now;
56 size_t i;
57
58 os_get_reltime(&now);
59 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
60 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
61 continue;
62
63 if (dev == p2p->go_neg_peer) {
64 /*
65 * GO Negotiation is in progress with the peer, so
66 * don't expire the peer entry until GO Negotiation
67 * fails or times out.
68 */
69 continue;
70 }
71
72 if (p2p->cfg->go_connected &&
73 p2p->cfg->go_connected(p2p->cfg->cb_ctx,
74 dev->info.p2p_device_addr)) {
75 /*
76 * We are connected as a client to a group in which the
77 * peer is the GO, so do not expire the peer entry.
78 */
79 os_get_reltime(&dev->last_seen);
80 continue;
81 }
82
83 for (i = 0; i < p2p->num_groups; i++) {
84 if (p2p_group_is_client_connected(
85 p2p->groups[i], dev->info.p2p_device_addr))
86 break;
87 }
88 if (i < p2p->num_groups) {
89 /*
90 * The peer is connected as a client in a group where
91 * we are the GO, so do not expire the peer entry.
92 */
93 os_get_reltime(&dev->last_seen);
94 continue;
95 }
96
97 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
98 MAC2STR(dev->info.p2p_device_addr));
99 dl_list_del(&dev->list);
100 p2p_device_free(p2p, dev);
101 }
102 }
103
104
105 static const char * p2p_state_txt(int state)
106 {
107 switch (state) {
108 case P2P_IDLE:
109 return "IDLE";
110 case P2P_SEARCH:
111 return "SEARCH";
112 case P2P_CONNECT:
113 return "CONNECT";
114 case P2P_CONNECT_LISTEN:
115 return "CONNECT_LISTEN";
116 case P2P_GO_NEG:
117 return "GO_NEG";
118 case P2P_LISTEN_ONLY:
119 return "LISTEN_ONLY";
120 case P2P_WAIT_PEER_CONNECT:
121 return "WAIT_PEER_CONNECT";
122 case P2P_WAIT_PEER_IDLE:
123 return "WAIT_PEER_IDLE";
124 case P2P_SD_DURING_FIND:
125 return "SD_DURING_FIND";
126 case P2P_PROVISIONING:
127 return "PROVISIONING";
128 case P2P_PD_DURING_FIND:
129 return "PD_DURING_FIND";
130 case P2P_INVITE:
131 return "INVITE";
132 case P2P_INVITE_LISTEN:
133 return "INVITE_LISTEN";
134 default:
135 return "?";
136 }
137 }
138
139
140 const char * p2p_get_state_txt(struct p2p_data *p2p)
141 {
142 return p2p_state_txt(p2p->state);
143 }
144
145
146 struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p)
147 {
148 return p2p ? p2p->p2ps_adv_list : NULL;
149 }
150
151
152 void p2p_set_intended_addr(struct p2p_data *p2p, const u8 *intended_addr)
153 {
154 if (p2p && intended_addr)
155 os_memcpy(p2p->intended_addr, intended_addr, ETH_ALEN);
156 }
157
158
159 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
160 {
161 struct p2p_device *dev = NULL;
162
163 if (!addr || !p2p)
164 return 0;
165
166 dev = p2p_get_device(p2p, addr);
167 if (dev)
168 return dev->wps_prov_info;
169 else
170 return 0;
171 }
172
173
174 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
175 {
176 struct p2p_device *dev = NULL;
177
178 if (!addr || !p2p)
179 return;
180
181 dev = p2p_get_device(p2p, addr);
182 if (dev)
183 dev->wps_prov_info = 0;
184 }
185
186
187 void p2p_set_state(struct p2p_data *p2p, int new_state)
188 {
189 p2p_dbg(p2p, "State %s -> %s",
190 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
191 p2p->state = new_state;
192
193 if (new_state == P2P_IDLE && p2p->pending_channel) {
194 p2p_dbg(p2p, "Apply change in listen channel");
195 p2p->cfg->reg_class = p2p->pending_reg_class;
196 p2p->cfg->channel = p2p->pending_channel;
197 p2p->pending_reg_class = 0;
198 p2p->pending_channel = 0;
199 }
200 }
201
202
203 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
204 {
205 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
206 p2p_state_txt(p2p->state), sec, usec);
207 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
208 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
209 }
210
211
212 void p2p_clear_timeout(struct p2p_data *p2p)
213 {
214 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
215 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
216 }
217
218
219 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
220 {
221 struct p2p_go_neg_results res;
222 struct p2p_device *peer = p2p->go_neg_peer;
223
224 if (!peer)
225 return;
226
227 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
228 if (p2p->state != P2P_SEARCH) {
229 /*
230 * Clear timeouts related to GO Negotiation if no new p2p_find
231 * has been started.
232 */
233 p2p_clear_timeout(p2p);
234 p2p_set_state(p2p, P2P_IDLE);
235 }
236
237 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
238 peer->wps_method = WPS_NOT_READY;
239 peer->oob_pw_id = 0;
240 wpabuf_free(peer->go_neg_conf);
241 peer->go_neg_conf = NULL;
242 p2p->go_neg_peer = NULL;
243
244 os_memset(&res, 0, sizeof(res));
245 res.status = status;
246 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
247 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
248 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
249 }
250
251
252 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
253 {
254 unsigned int r, tu;
255 int freq;
256 struct wpabuf *ies;
257
258 p2p_dbg(p2p, "Starting short listen state (state=%s)",
259 p2p_state_txt(p2p->state));
260
261 if (p2p->pending_listen_freq) {
262 /* We have a pending p2p_listen request */
263 p2p_dbg(p2p, "p2p_listen command pending already");
264 return;
265 }
266
267 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
268 if (freq < 0) {
269 p2p_dbg(p2p, "Unknown regulatory class/channel");
270 return;
271 }
272
273 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
274 r = 0;
275 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
276 p2p->min_disc_int) * 100;
277 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
278 tu = p2p->max_disc_tu;
279 if (!dev_disc && tu < 100)
280 tu = 100; /* Need to wait in non-device discovery use cases */
281 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
282 tu = p2p->cfg->max_listen * 1000 / 1024;
283
284 if (tu == 0) {
285 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
286 p2p_set_timeout(p2p, 0, 0);
287 return;
288 }
289
290 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
291 if (ies == NULL)
292 return;
293
294 p2p->pending_listen_freq = freq;
295 p2p->pending_listen_sec = 0;
296 p2p->pending_listen_usec = 1024 * tu;
297
298 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
299 ies) < 0) {
300 p2p_dbg(p2p, "Failed to start listen mode");
301 p2p->pending_listen_freq = 0;
302 }
303 wpabuf_free(ies);
304 }
305
306
307 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
308 {
309 int freq;
310 struct wpabuf *ies;
311
312 p2p_dbg(p2p, "Going to listen(only) state");
313
314 if (p2p->pending_listen_freq) {
315 /* We have a pending p2p_listen request */
316 p2p_dbg(p2p, "p2p_listen command pending already");
317 return -1;
318 }
319
320 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
321 if (freq < 0) {
322 p2p_dbg(p2p, "Unknown regulatory class/channel");
323 return -1;
324 }
325
326 p2p->pending_listen_sec = timeout / 1000;
327 p2p->pending_listen_usec = (timeout % 1000) * 1000;
328
329 if (p2p->p2p_scan_running) {
330 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
331 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
332 return 0;
333 }
334 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
335 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
336 return 0;
337 }
338
339 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
340 if (ies == NULL)
341 return -1;
342
343 p2p->pending_listen_freq = freq;
344
345 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
346 p2p_dbg(p2p, "Failed to start listen mode");
347 p2p->pending_listen_freq = 0;
348 wpabuf_free(ies);
349 return -1;
350 }
351 wpabuf_free(ies);
352
353 p2p_set_state(p2p, P2P_LISTEN_ONLY);
354
355 return 0;
356 }
357
358
359 static void p2p_device_clear_reported(struct p2p_data *p2p)
360 {
361 struct p2p_device *dev;
362 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
363 dev->flags &= ~P2P_DEV_REPORTED;
364 dev->sd_reqs = 0;
365 }
366 }
367
368
369 /**
370 * p2p_get_device - Fetch a peer entry
371 * @p2p: P2P module context from p2p_init()
372 * @addr: P2P Device Address of the peer
373 * Returns: Pointer to the device entry or %NULL if not found
374 */
375 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
376 {
377 struct p2p_device *dev;
378 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
379 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
380 return dev;
381 }
382 return NULL;
383 }
384
385
386 /**
387 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
388 * @p2p: P2P module context from p2p_init()
389 * @addr: P2P Interface Address of the peer
390 * Returns: Pointer to the device entry or %NULL if not found
391 */
392 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
393 const u8 *addr)
394 {
395 struct p2p_device *dev;
396 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
397 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
398 return dev;
399 }
400 return NULL;
401 }
402
403
404 /**
405 * p2p_create_device - Create a peer entry
406 * @p2p: P2P module context from p2p_init()
407 * @addr: P2P Device Address of the peer
408 * Returns: Pointer to the device entry or %NULL on failure
409 *
410 * If there is already an entry for the peer, it will be returned instead of
411 * creating a new one.
412 */
413 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
414 const u8 *addr)
415 {
416 struct p2p_device *dev, *oldest = NULL;
417 size_t count = 0;
418
419 dev = p2p_get_device(p2p, addr);
420 if (dev)
421 return dev;
422
423 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
424 count++;
425 if (oldest == NULL ||
426 os_reltime_before(&dev->last_seen, &oldest->last_seen))
427 oldest = dev;
428 }
429 if (count + 1 > p2p->cfg->max_peers && oldest) {
430 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
431 dl_list_del(&oldest->list);
432 p2p_device_free(p2p, oldest);
433 }
434
435 dev = os_zalloc(sizeof(*dev));
436 if (dev == NULL)
437 return NULL;
438 dl_list_add(&p2p->devices, &dev->list);
439 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
440
441 return dev;
442 }
443
444
445 static void p2p_copy_client_info(struct p2p_device *dev,
446 struct p2p_client_info *cli)
447 {
448 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
449 dev->info.device_name[cli->dev_name_len] = '\0';
450 dev->info.dev_capab = cli->dev_capab;
451 dev->info.config_methods = cli->config_methods;
452 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
453 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
454 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
455 dev->info.wps_sec_dev_type_list_len);
456 }
457
458
459 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
460 const u8 *go_interface_addr, int freq,
461 const u8 *gi, size_t gi_len,
462 struct os_reltime *rx_time)
463 {
464 struct p2p_group_info info;
465 size_t c;
466 struct p2p_device *dev;
467
468 if (gi == NULL)
469 return 0;
470
471 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
472 return -1;
473
474 /*
475 * Clear old data for this group; if the devices are still in the
476 * group, the information will be restored in the loop following this.
477 */
478 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
479 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
480 ETH_ALEN) == 0) {
481 os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
482 os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
483 }
484 }
485
486 for (c = 0; c < info.num_clients; c++) {
487 struct p2p_client_info *cli = &info.client[c];
488 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
489 ETH_ALEN) == 0)
490 continue; /* ignore our own entry */
491 dev = p2p_get_device(p2p, cli->p2p_device_addr);
492 if (dev) {
493 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
494 P2P_DEV_PROBE_REQ_ONLY)) {
495 /*
496 * Update information since we have not
497 * received this directly from the client.
498 */
499 p2p_copy_client_info(dev, cli);
500 } else {
501 /*
502 * Need to update P2P Client Discoverability
503 * flag since it is valid only in P2P Group
504 * Info attribute.
505 */
506 dev->info.dev_capab &=
507 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
508 dev->info.dev_capab |=
509 cli->dev_capab &
510 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
511 }
512 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
513 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
514 }
515 } else {
516 dev = p2p_create_device(p2p, cli->p2p_device_addr);
517 if (dev == NULL)
518 continue;
519 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
520 p2p_copy_client_info(dev, cli);
521 dev->oper_freq = freq;
522 p2p->cfg->dev_found(p2p->cfg->cb_ctx,
523 dev->info.p2p_device_addr,
524 &dev->info, 1);
525 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
526 }
527
528 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
529 ETH_ALEN);
530 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
531 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
532 os_memcpy(dev->member_in_go_iface, go_interface_addr,
533 ETH_ALEN);
534 dev->flags |= P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT;
535 }
536
537 return 0;
538 }
539
540
541 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
542 int probe_req, const struct p2p_message *msg)
543 {
544 os_memcpy(dev->info.device_name, msg->device_name,
545 sizeof(dev->info.device_name));
546
547 if (msg->manufacturer &&
548 msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
549 os_memset(dev->info.manufacturer, 0,
550 sizeof(dev->info.manufacturer));
551 os_memcpy(dev->info.manufacturer, msg->manufacturer,
552 msg->manufacturer_len);
553 }
554
555 if (msg->model_name &&
556 msg->model_name_len < sizeof(dev->info.model_name)) {
557 os_memset(dev->info.model_name, 0,
558 sizeof(dev->info.model_name));
559 os_memcpy(dev->info.model_name, msg->model_name,
560 msg->model_name_len);
561 }
562
563 if (msg->model_number &&
564 msg->model_number_len < sizeof(dev->info.model_number)) {
565 os_memset(dev->info.model_number, 0,
566 sizeof(dev->info.model_number));
567 os_memcpy(dev->info.model_number, msg->model_number,
568 msg->model_number_len);
569 }
570
571 if (msg->serial_number &&
572 msg->serial_number_len < sizeof(dev->info.serial_number)) {
573 os_memset(dev->info.serial_number, 0,
574 sizeof(dev->info.serial_number));
575 os_memcpy(dev->info.serial_number, msg->serial_number,
576 msg->serial_number_len);
577 }
578
579 if (msg->pri_dev_type)
580 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
581 sizeof(dev->info.pri_dev_type));
582 else if (msg->wps_pri_dev_type)
583 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
584 sizeof(dev->info.pri_dev_type));
585
586 if (msg->wps_sec_dev_type_list) {
587 os_memcpy(dev->info.wps_sec_dev_type_list,
588 msg->wps_sec_dev_type_list,
589 msg->wps_sec_dev_type_list_len);
590 dev->info.wps_sec_dev_type_list_len =
591 msg->wps_sec_dev_type_list_len;
592 }
593
594 if (msg->capability) {
595 /*
596 * P2P Client Discoverability bit is reserved in all frames
597 * that use this function, so do not change its value here.
598 */
599 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
600 dev->info.dev_capab |= msg->capability[0] &
601 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
602 dev->info.group_capab = msg->capability[1];
603 }
604
605 if (msg->ext_listen_timing) {
606 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
607 dev->ext_listen_interval =
608 WPA_GET_LE16(msg->ext_listen_timing + 2);
609 }
610
611 if (!probe_req) {
612 u16 new_config_methods;
613 new_config_methods = msg->config_methods ?
614 msg->config_methods : msg->wps_config_methods;
615 if (new_config_methods &&
616 dev->info.config_methods != new_config_methods) {
617 p2p_dbg(p2p, "Update peer " MACSTR
618 " config_methods 0x%x -> 0x%x",
619 MAC2STR(dev->info.p2p_device_addr),
620 dev->info.config_methods,
621 new_config_methods);
622 dev->info.config_methods = new_config_methods;
623 }
624 }
625 }
626
627
628 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
629 size_t ies_len)
630 {
631 const u8 *pos, *end;
632 u8 id, len;
633
634 wpabuf_free(dev->info.vendor_elems);
635 dev->info.vendor_elems = NULL;
636
637 end = ies + ies_len;
638
639 for (pos = ies; pos + 1 < end; pos += len) {
640 id = *pos++;
641 len = *pos++;
642
643 if (pos + len > end)
644 break;
645
646 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
647 continue;
648
649 if (len >= 4) {
650 u32 type = WPA_GET_BE32(pos);
651
652 if (type == WPA_IE_VENDOR_TYPE ||
653 type == WMM_IE_VENDOR_TYPE ||
654 type == WPS_IE_VENDOR_TYPE ||
655 type == P2P_IE_VENDOR_TYPE ||
656 type == WFD_IE_VENDOR_TYPE)
657 continue;
658 }
659
660 /* Unknown vendor element - make raw IE data available */
661 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
662 break;
663 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
664 }
665 }
666
667
668 static int p2p_compare_wfd_info(struct p2p_device *dev,
669 const struct p2p_message *msg)
670 {
671 if (dev->info.wfd_subelems && msg->wfd_subelems) {
672 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
673 return 1;
674
675 return os_memcmp(dev->info.wfd_subelems->buf,
676 msg->wfd_subelems->buf,
677 dev->info.wfd_subelems->used);
678 }
679 if (dev->info.wfd_subelems || msg->wfd_subelems)
680 return 1;
681
682 return 0;
683 }
684
685
686 /**
687 * p2p_add_device - Add peer entries based on scan results or P2P frames
688 * @p2p: P2P module context from p2p_init()
689 * @addr: Source address of Beacon or Probe Response frame (may be either
690 * P2P Device Address or P2P Interface Address)
691 * @level: Signal level (signal strength of the received frame from the peer)
692 * @freq: Frequency on which the Beacon or Probe Response frame was received
693 * @rx_time: Time when the result was received
694 * @ies: IEs from the Beacon or Probe Response frame
695 * @ies_len: Length of ies buffer in octets
696 * @scan_res: Whether this was based on scan results
697 * Returns: 0 on success, -1 on failure
698 *
699 * If the scan result is for a GO, the clients in the group will also be added
700 * to the peer table. This function can also be used with some other frames
701 * like Provision Discovery Request that contains P2P Capability and P2P Device
702 * Info attributes.
703 */
704 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
705 struct os_reltime *rx_time, int level, const u8 *ies,
706 size_t ies_len, int scan_res)
707 {
708 struct p2p_device *dev;
709 struct p2p_message msg;
710 const u8 *p2p_dev_addr;
711 int wfd_changed;
712 int i;
713 struct os_reltime time_now;
714
715 os_memset(&msg, 0, sizeof(msg));
716 if (p2p_parse_ies(ies, ies_len, &msg)) {
717 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
718 p2p_parse_free(&msg);
719 return -1;
720 }
721
722 if (msg.p2p_device_addr)
723 p2p_dev_addr = msg.p2p_device_addr;
724 else if (msg.device_id)
725 p2p_dev_addr = msg.device_id;
726 else {
727 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
728 p2p_parse_free(&msg);
729 return -1;
730 }
731
732 if (!is_zero_ether_addr(p2p->peer_filter) &&
733 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
734 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
735 " due to peer filter", MAC2STR(p2p_dev_addr));
736 p2p_parse_free(&msg);
737 return 0;
738 }
739
740 dev = p2p_create_device(p2p, p2p_dev_addr);
741 if (dev == NULL) {
742 p2p_parse_free(&msg);
743 return -1;
744 }
745
746 if (rx_time == NULL) {
747 os_get_reltime(&time_now);
748 rx_time = &time_now;
749 }
750
751 /*
752 * Update the device entry only if the new peer
753 * entry is newer than the one previously stored, or if
754 * the device was previously seen as a P2P Client in a group
755 * and the new entry isn't older than a threshold.
756 */
757 if (dev->last_seen.sec > 0 &&
758 os_reltime_before(rx_time, &dev->last_seen) &&
759 (!(dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT) ||
760 os_reltime_expired(&dev->last_seen, rx_time,
761 P2P_DEV_GROUP_CLIENT_RESP_THRESHOLD))) {
762 p2p_dbg(p2p,
763 "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u flags=0x%x)",
764 (unsigned int) rx_time->sec,
765 (unsigned int) rx_time->usec,
766 (unsigned int) dev->last_seen.sec,
767 (unsigned int) dev->last_seen.usec,
768 dev->flags);
769 p2p_parse_free(&msg);
770 return -1;
771 }
772
773 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
774
775 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY |
776 P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT);
777
778 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
779 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
780 if (msg.ssid &&
781 msg.ssid[1] <= sizeof(dev->oper_ssid) &&
782 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
783 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
784 != 0)) {
785 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
786 dev->oper_ssid_len = msg.ssid[1];
787 }
788
789 if (msg.adv_service_instance && msg.adv_service_instance_len) {
790 wpabuf_free(dev->info.p2ps_instance);
791 dev->info.p2ps_instance = wpabuf_alloc_copy(
792 msg.adv_service_instance, msg.adv_service_instance_len);
793 }
794
795 if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
796 *msg.ds_params >= 1 && *msg.ds_params <= 14) {
797 int ds_freq;
798 if (*msg.ds_params == 14)
799 ds_freq = 2484;
800 else
801 ds_freq = 2407 + *msg.ds_params * 5;
802 if (freq != ds_freq) {
803 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
804 freq, ds_freq);
805 freq = ds_freq;
806 }
807 }
808
809 if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
810 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
811 MACSTR " %d -> %d MHz (DS param %d)",
812 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
813 freq, msg.ds_params ? *msg.ds_params : -1);
814 }
815 if (scan_res) {
816 dev->listen_freq = freq;
817 if (msg.group_info)
818 dev->oper_freq = freq;
819 }
820 dev->info.level = level;
821
822 p2p_copy_wps_info(p2p, dev, 0, &msg);
823
824 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
825 wpabuf_free(dev->info.wps_vendor_ext[i]);
826 dev->info.wps_vendor_ext[i] = NULL;
827 }
828
829 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
830 if (msg.wps_vendor_ext[i] == NULL)
831 break;
832 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
833 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
834 if (dev->info.wps_vendor_ext[i] == NULL)
835 break;
836 }
837
838 wfd_changed = p2p_compare_wfd_info(dev, &msg);
839
840 if (msg.wfd_subelems) {
841 wpabuf_free(dev->info.wfd_subelems);
842 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
843 }
844
845 if (scan_res) {
846 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
847 msg.group_info, msg.group_info_len,
848 rx_time);
849 }
850
851 p2p_parse_free(&msg);
852
853 p2p_update_peer_vendor_elems(dev, ies, ies_len);
854
855 if (dev->flags & P2P_DEV_REPORTED && !wfd_changed &&
856 (!msg.adv_service_instance ||
857 (dev->flags & P2P_DEV_P2PS_REPORTED)))
858 return 0;
859
860 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
861 freq, (unsigned int) rx_time->sec,
862 (unsigned int) rx_time->usec);
863 if (dev->flags & P2P_DEV_USER_REJECTED) {
864 p2p_dbg(p2p, "Do not report rejected device");
865 return 0;
866 }
867
868 if (dev->info.config_methods == 0 &&
869 (freq == 2412 || freq == 2437 || freq == 2462)) {
870 /*
871 * If we have only seen a Beacon frame from a GO, we do not yet
872 * know what WPS config methods it supports. Since some
873 * applications use config_methods value from P2P-DEVICE-FOUND
874 * events, postpone reporting this peer until we've fully
875 * discovered its capabilities.
876 *
877 * At least for now, do this only if the peer was detected on
878 * one of the social channels since that peer can be easily be
879 * found again and there are no limitations of having to use
880 * passive scan on this channels, so this can be done through
881 * Probe Response frame that includes the config_methods
882 * information.
883 */
884 p2p_dbg(p2p, "Do not report peer " MACSTR
885 " with unknown config methods", MAC2STR(addr));
886 return 0;
887 }
888
889 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
890 !(dev->flags & P2P_DEV_REPORTED_ONCE));
891 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
892
893 if (msg.adv_service_instance)
894 dev->flags |= P2P_DEV_P2PS_REPORTED;
895
896 return 0;
897 }
898
899
900 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
901 {
902 int i;
903
904 if (p2p->go_neg_peer == dev) {
905 /*
906 * If GO Negotiation is in progress, report that it has failed.
907 */
908 p2p_go_neg_failed(p2p, -1);
909 }
910 if (p2p->invite_peer == dev)
911 p2p->invite_peer = NULL;
912 if (p2p->sd_peer == dev)
913 p2p->sd_peer = NULL;
914 if (p2p->pending_client_disc_go == dev)
915 p2p->pending_client_disc_go = NULL;
916
917 /* dev_lost() device, but only if it was previously dev_found() */
918 if (dev->flags & P2P_DEV_REPORTED_ONCE)
919 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
920 dev->info.p2p_device_addr);
921
922 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
923 wpabuf_free(dev->info.wps_vendor_ext[i]);
924 dev->info.wps_vendor_ext[i] = NULL;
925 }
926
927 wpabuf_free(dev->info.wfd_subelems);
928 wpabuf_free(dev->info.vendor_elems);
929 wpabuf_free(dev->go_neg_conf);
930 wpabuf_free(dev->info.p2ps_instance);
931
932 os_free(dev);
933 }
934
935
936 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
937 {
938 struct p2p_channels *c;
939 struct p2p_reg_class *cla;
940 size_t cl, ch;
941 int found = 0;
942 u8 reg_class;
943 u8 channel;
944 int freq;
945
946 c = &p2p->cfg->channels;
947 for (cl = 0; cl < c->reg_classes; cl++) {
948 cla = &c->reg_class[cl];
949 if (cla->reg_class != p2p->last_prog_scan_class)
950 continue;
951 for (ch = 0; ch < cla->channels; ch++) {
952 if (cla->channel[ch] == p2p->last_prog_scan_chan) {
953 found = 1;
954 break;
955 }
956 }
957 if (found)
958 break;
959 }
960
961 if (!found) {
962 /* Start from beginning */
963 reg_class = c->reg_class[0].reg_class;
964 channel = c->reg_class[0].channel[0];
965 } else {
966 /* Pick the next channel */
967 ch++;
968 if (ch == cla->channels) {
969 cl++;
970 if (cl == c->reg_classes)
971 cl = 0;
972 ch = 0;
973 }
974 reg_class = c->reg_class[cl].reg_class;
975 channel = c->reg_class[cl].channel[ch];
976 }
977
978 freq = p2p_channel_to_freq(reg_class, channel);
979 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
980 reg_class, channel, freq);
981 p2p->last_prog_scan_class = reg_class;
982 p2p->last_prog_scan_chan = channel;
983
984 if (freq == 2412 || freq == 2437 || freq == 2462)
985 return 0; /* No need to add social channels */
986 return freq;
987 }
988
989
990 static void p2p_search(struct p2p_data *p2p)
991 {
992 int freq = 0;
993 enum p2p_scan_type type;
994 u16 pw_id = DEV_PW_DEFAULT;
995 int res;
996
997 if (p2p->drv_in_listen) {
998 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
999 return;
1000 }
1001 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1002
1003 if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
1004 (freq = p2p_get_next_prog_freq(p2p)) > 0) {
1005 type = P2P_SCAN_SOCIAL_PLUS_ONE;
1006 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
1007 } else {
1008 type = P2P_SCAN_SOCIAL;
1009 p2p_dbg(p2p, "Starting search");
1010 }
1011
1012 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
1013 p2p->num_req_dev_types, p2p->req_dev_types,
1014 p2p->find_dev_id, pw_id);
1015 if (res < 0) {
1016 p2p_dbg(p2p, "Scan request schedule failed");
1017 p2p_continue_find(p2p);
1018 }
1019 }
1020
1021
1022 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
1023 {
1024 struct p2p_data *p2p = eloop_ctx;
1025 p2p_dbg(p2p, "Find timeout -> stop");
1026 p2p_stop_find(p2p);
1027 }
1028
1029
1030 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
1031 {
1032 if (status != 0) {
1033 p2p_dbg(p2p, "Scan request failed");
1034 /* Do continue find even for the first p2p_find_scan */
1035 p2p_continue_find(p2p);
1036 } else {
1037 p2p_dbg(p2p, "Running p2p_scan");
1038 p2p->p2p_scan_running = 1;
1039 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1040 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1041 p2p, NULL);
1042 }
1043 }
1044
1045
1046 static int p2p_run_after_scan(struct p2p_data *p2p)
1047 {
1048 struct p2p_device *dev;
1049 enum p2p_after_scan op;
1050
1051 if (p2p->after_scan_tx) {
1052 p2p->after_scan_tx_in_progress = 1;
1053 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1054 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1055 p2p->after_scan_tx->freq,
1056 p2p->after_scan_tx->dst,
1057 p2p->after_scan_tx->src,
1058 p2p->after_scan_tx->bssid,
1059 (u8 *) (p2p->after_scan_tx + 1),
1060 p2p->after_scan_tx->len,
1061 p2p->after_scan_tx->wait_time);
1062 os_free(p2p->after_scan_tx);
1063 p2p->after_scan_tx = NULL;
1064 return 1;
1065 }
1066
1067 op = p2p->start_after_scan;
1068 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1069 switch (op) {
1070 case P2P_AFTER_SCAN_NOTHING:
1071 break;
1072 case P2P_AFTER_SCAN_LISTEN:
1073 p2p_dbg(p2p, "Start previously requested Listen state");
1074 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1075 p2p->pending_listen_usec / 1000);
1076 return 1;
1077 case P2P_AFTER_SCAN_CONNECT:
1078 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1079 MAC2STR(p2p->after_scan_peer));
1080 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1081 if (dev == NULL) {
1082 p2p_dbg(p2p, "Peer not known anymore");
1083 break;
1084 }
1085 p2p_connect_send(p2p, dev);
1086 return 1;
1087 }
1088
1089 return 0;
1090 }
1091
1092
1093 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1094 {
1095 struct p2p_data *p2p = eloop_ctx;
1096 int running;
1097 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1098 running = p2p->p2p_scan_running;
1099 /* Make sure we recover from missed scan results callback */
1100 p2p->p2p_scan_running = 0;
1101
1102 if (running)
1103 p2p_run_after_scan(p2p);
1104 }
1105
1106
1107 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1108 {
1109 p2p->num_req_dev_types = 0;
1110 os_free(p2p->req_dev_types);
1111 p2p->req_dev_types = NULL;
1112 }
1113
1114
1115 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash)
1116 {
1117 u8 buf[SHA256_MAC_LEN];
1118 char str_buf[256];
1119 const u8 *adv_array;
1120 size_t i, adv_len;
1121
1122 if (!str || !hash)
1123 return 0;
1124
1125 if (!str[0]) {
1126 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1127 return 1;
1128 }
1129
1130 adv_array = (u8 *) str_buf;
1131 adv_len = os_strlen(str);
1132 if (adv_len >= sizeof(str_buf))
1133 return 0;
1134
1135 for (i = 0; str[i] && i < adv_len; i++) {
1136 if (str[i] >= 'A' && str[i] <= 'Z')
1137 str_buf[i] = str[i] - 'A' + 'a';
1138 else
1139 str_buf[i] = str[i];
1140 }
1141
1142 if (sha256_vector(1, &adv_array, &adv_len, buf))
1143 return 0;
1144
1145 os_memcpy(hash, buf, P2PS_HASH_LEN);
1146 return 1;
1147 }
1148
1149
1150 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1151 enum p2p_discovery_type type,
1152 unsigned int num_req_dev_types, const u8 *req_dev_types,
1153 const u8 *dev_id, unsigned int search_delay,
1154 u8 seek_count, const char **seek, int freq)
1155 {
1156 int res;
1157
1158 p2p_dbg(p2p, "Starting find (type=%d)", type);
1159 os_get_reltime(&p2p->find_start);
1160 if (p2p->p2p_scan_running) {
1161 p2p_dbg(p2p, "p2p_scan is already running");
1162 }
1163
1164 p2p_free_req_dev_types(p2p);
1165 if (req_dev_types && num_req_dev_types) {
1166 p2p->req_dev_types = os_malloc(num_req_dev_types *
1167 WPS_DEV_TYPE_LEN);
1168 if (p2p->req_dev_types == NULL)
1169 return -1;
1170 os_memcpy(p2p->req_dev_types, req_dev_types,
1171 num_req_dev_types * WPS_DEV_TYPE_LEN);
1172 p2p->num_req_dev_types = num_req_dev_types;
1173 }
1174
1175 if (dev_id) {
1176 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1177 p2p->find_dev_id = p2p->find_dev_id_buf;
1178 } else
1179 p2p->find_dev_id = NULL;
1180
1181 if (seek_count == 0 || !seek) {
1182 /* Not an ASP search */
1183 p2p->p2ps_seek = 0;
1184 } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) {
1185 /*
1186 * An empty seek string means no hash values, but still an ASP
1187 * search.
1188 */
1189 p2p_dbg(p2p, "ASP search");
1190 p2p->p2ps_seek_count = 0;
1191 p2p->p2ps_seek = 1;
1192 } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
1193 u8 buf[P2PS_HASH_LEN];
1194 int i, count = 0;
1195
1196 for (i = 0; i < seek_count; i++) {
1197 if (!p2ps_gen_hash(p2p, seek[i], buf))
1198 continue;
1199
1200 p2p_dbg(p2p, "Seek service %s hash " MACSTR,
1201 seek[i], MAC2STR(buf));
1202 os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN],
1203 buf, P2PS_HASH_LEN);
1204 count++;
1205 }
1206
1207 p2p->p2ps_seek_count = count;
1208 p2p->p2ps_seek = 1;
1209 } else {
1210 p2p->p2ps_seek_count = 0;
1211 p2p->p2ps_seek = 1;
1212 }
1213
1214 /* Special case to perform wildcard search */
1215 if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
1216 p2p->p2ps_seek_count = 1;
1217 os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash,
1218 P2PS_HASH_LEN);
1219 }
1220
1221 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1222 p2p_clear_timeout(p2p);
1223 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1224 p2p->find_type = type;
1225 p2p_device_clear_reported(p2p);
1226 p2p_set_state(p2p, P2P_SEARCH);
1227 p2p->search_delay = search_delay;
1228 p2p->in_search_delay = 0;
1229 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1230 p2p->last_p2p_find_timeout = timeout;
1231 if (timeout)
1232 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1233 p2p, NULL);
1234 switch (type) {
1235 case P2P_FIND_START_WITH_FULL:
1236 if (freq > 0) {
1237 /*
1238 * Start with the specified channel and then move to
1239 * social channels only scans.
1240 */
1241 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx,
1242 P2P_SCAN_SPECIFIC, freq,
1243 p2p->num_req_dev_types,
1244 p2p->req_dev_types, dev_id,
1245 DEV_PW_DEFAULT);
1246 break;
1247 }
1248 /* fall through */
1249 case P2P_FIND_PROGRESSIVE:
1250 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1251 p2p->num_req_dev_types,
1252 p2p->req_dev_types, dev_id,
1253 DEV_PW_DEFAULT);
1254 break;
1255 case P2P_FIND_ONLY_SOCIAL:
1256 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1257 p2p->num_req_dev_types,
1258 p2p->req_dev_types, dev_id,
1259 DEV_PW_DEFAULT);
1260 break;
1261 default:
1262 return -1;
1263 }
1264
1265 if (res != 0 && p2p->p2p_scan_running) {
1266 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1267 /* wait for the previous p2p_scan to complete */
1268 res = 0; /* do not report failure */
1269 } else if (res != 0) {
1270 p2p_dbg(p2p, "Failed to start p2p_scan");
1271 p2p_set_state(p2p, P2P_IDLE);
1272 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1273 }
1274
1275 return res;
1276 }
1277
1278
1279 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1280 {
1281 p2p_dbg(p2p, "Stopping find");
1282 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1283 p2p_clear_timeout(p2p);
1284 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
1285 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1286
1287 p2p->p2ps_seek_count = 0;
1288
1289 p2p_set_state(p2p, P2P_IDLE);
1290 p2p_free_req_dev_types(p2p);
1291 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1292 if (p2p->go_neg_peer)
1293 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1294 p2p->go_neg_peer = NULL;
1295 p2p->sd_peer = NULL;
1296 p2p->invite_peer = NULL;
1297 p2p_stop_listen_for_freq(p2p, freq);
1298 p2p->send_action_in_progress = 0;
1299 }
1300
1301
1302 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1303 {
1304 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1305 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1306 return;
1307 }
1308 if (p2p->in_listen) {
1309 p2p->in_listen = 0;
1310 p2p_clear_timeout(p2p);
1311 }
1312 if (p2p->drv_in_listen) {
1313 /*
1314 * The driver may not deliver callback to p2p_listen_end()
1315 * when the operation gets canceled, so clear the internal
1316 * variable that is tracking driver state.
1317 */
1318 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1319 p2p->drv_in_listen = 0;
1320 }
1321 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1322 }
1323
1324
1325 void p2p_stop_listen(struct p2p_data *p2p)
1326 {
1327 if (p2p->state != P2P_LISTEN_ONLY) {
1328 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1329 return;
1330 }
1331
1332 p2p_stop_listen_for_freq(p2p, 0);
1333 p2p_set_state(p2p, P2P_IDLE);
1334 }
1335
1336
1337 void p2p_stop_find(struct p2p_data *p2p)
1338 {
1339 p2p->pending_listen_freq = 0;
1340 p2p_stop_find_for_freq(p2p, 0);
1341 }
1342
1343
1344 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1345 unsigned int force_freq,
1346 unsigned int pref_freq, int go)
1347 {
1348 u8 op_class, op_channel;
1349 unsigned int freq = force_freq ? force_freq : pref_freq;
1350
1351 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1352 force_freq, pref_freq, go);
1353 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1354 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1355 return -1;
1356 }
1357
1358 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1359 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1360 op_channel))) {
1361 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1362 freq, op_class, op_channel);
1363 return -1;
1364 }
1365
1366 p2p->op_reg_class = op_class;
1367 p2p->op_channel = op_channel;
1368
1369 if (force_freq) {
1370 p2p->channels.reg_classes = 1;
1371 p2p->channels.reg_class[0].channels = 1;
1372 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1373 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1374 } else {
1375 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1376 sizeof(struct p2p_channels));
1377 }
1378
1379 return 0;
1380 }
1381
1382
1383 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1384 {
1385 u8 op_class, op_channel;
1386 const int op_classes_5ghz[] = { 124, 125, 115, 0 };
1387 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1388 const int op_classes_vht[] = { 128, 0 };
1389
1390 p2p_dbg(p2p, "Prepare channel best");
1391
1392 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1393 p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1394 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1395 == 0) {
1396 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1397 p2p->op_reg_class = op_class;
1398 p2p->op_channel = op_channel;
1399 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1400 p2p_supported_freq(p2p, p2p->best_freq_5) &&
1401 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1402 == 0) {
1403 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1404 p2p->op_reg_class = op_class;
1405 p2p->op_channel = op_channel;
1406 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1407 p2p_supported_freq(p2p, p2p->best_freq_24) &&
1408 p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1409 &op_channel) == 0) {
1410 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1411 p2p->op_reg_class = op_class;
1412 p2p->op_channel = op_channel;
1413 } else if (p2p->cfg->num_pref_chan > 0 &&
1414 p2p_channels_includes(&p2p->cfg->channels,
1415 p2p->cfg->pref_chan[0].op_class,
1416 p2p->cfg->pref_chan[0].chan)) {
1417 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1418 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1419 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1420 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1421 &p2p->op_reg_class, &p2p->op_channel) ==
1422 0) {
1423 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1424 p2p->op_reg_class, p2p->op_channel);
1425 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1426 &p2p->op_reg_class, &p2p->op_channel) ==
1427 0) {
1428 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1429 p2p->op_reg_class, p2p->op_channel);
1430 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1431 &p2p->op_reg_class, &p2p->op_channel) ==
1432 0) {
1433 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1434 p2p->op_reg_class, p2p->op_channel);
1435 } else if (p2p_channels_includes(&p2p->cfg->channels,
1436 p2p->cfg->op_reg_class,
1437 p2p->cfg->op_channel)) {
1438 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1439 p2p->op_reg_class = p2p->cfg->op_reg_class;
1440 p2p->op_channel = p2p->cfg->op_channel;
1441 } else if (p2p_channel_random_social(&p2p->cfg->channels,
1442 &p2p->op_reg_class,
1443 &p2p->op_channel) == 0) {
1444 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1445 p2p->op_reg_class, p2p->op_channel);
1446 } else {
1447 /* Select any random available channel from the first available
1448 * operating class */
1449 p2p_channel_select(&p2p->cfg->channels, NULL,
1450 &p2p->op_reg_class,
1451 &p2p->op_channel);
1452 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1453 p2p->op_channel, p2p->op_reg_class);
1454 }
1455
1456 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1457 sizeof(struct p2p_channels));
1458 }
1459
1460
1461 /**
1462 * p2p_prepare_channel - Select operating channel for GO Negotiation
1463 * @p2p: P2P module context from p2p_init()
1464 * @dev: Selected peer device
1465 * @force_freq: Forced frequency in MHz or 0 if not forced
1466 * @pref_freq: Preferred frequency in MHz or 0 if no preference
1467 * @go: Whether the local end will be forced to be GO
1468 * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1469 *
1470 * This function is used to do initial operating channel selection for GO
1471 * Negotiation prior to having received peer information. The selected channel
1472 * may be further optimized in p2p_reselect_channel() once the peer information
1473 * is available.
1474 */
1475 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1476 unsigned int force_freq, unsigned int pref_freq, int go)
1477 {
1478 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1479 force_freq, pref_freq, go);
1480 if (force_freq || pref_freq) {
1481 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1482 0)
1483 return -1;
1484 } else {
1485 p2p_prepare_channel_best(p2p);
1486 }
1487 p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1488 if (go)
1489 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1490 else if (!force_freq)
1491 p2p_channels_union_inplace(&p2p->channels,
1492 &p2p->cfg->cli_channels);
1493 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1494
1495 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1496 p2p->op_reg_class, p2p->op_channel,
1497 force_freq ? " (forced)" : "");
1498
1499 if (force_freq)
1500 dev->flags |= P2P_DEV_FORCE_FREQ;
1501 else
1502 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1503
1504 return 0;
1505 }
1506
1507
1508 static void p2p_set_dev_persistent(struct p2p_device *dev,
1509 int persistent_group)
1510 {
1511 switch (persistent_group) {
1512 case 0:
1513 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1514 P2P_DEV_PREFER_PERSISTENT_RECONN);
1515 break;
1516 case 1:
1517 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1518 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1519 break;
1520 case 2:
1521 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1522 P2P_DEV_PREFER_PERSISTENT_RECONN;
1523 break;
1524 }
1525 }
1526
1527
1528 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1529 enum p2p_wps_method wps_method,
1530 int go_intent, const u8 *own_interface_addr,
1531 unsigned int force_freq, int persistent_group,
1532 const u8 *force_ssid, size_t force_ssid_len,
1533 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1534 {
1535 struct p2p_device *dev;
1536
1537 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1538 " GO Intent=%d Intended Interface Address=" MACSTR
1539 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1540 "oob_pw_id=%u",
1541 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1542 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1543
1544 dev = p2p_get_device(p2p, peer_addr);
1545 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1546 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1547 MAC2STR(peer_addr));
1548 return -1;
1549 }
1550
1551 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1552 go_intent == 15) < 0)
1553 return -1;
1554
1555 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1556 if (!(dev->info.dev_capab &
1557 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1558 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1559 " that is in a group and is not discoverable",
1560 MAC2STR(peer_addr));
1561 return -1;
1562 }
1563 if (dev->oper_freq <= 0) {
1564 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1565 " with incomplete information",
1566 MAC2STR(peer_addr));
1567 return -1;
1568 }
1569
1570 /*
1571 * First, try to connect directly. If the peer does not
1572 * acknowledge frames, assume it is sleeping and use device
1573 * discoverability via the GO at that point.
1574 */
1575 }
1576
1577 p2p->ssid_set = 0;
1578 if (force_ssid) {
1579 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1580 force_ssid, force_ssid_len);
1581 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1582 p2p->ssid_len = force_ssid_len;
1583 p2p->ssid_set = 1;
1584 }
1585
1586 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1587 dev->flags &= ~P2P_DEV_USER_REJECTED;
1588 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1589 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1590 if (pd_before_go_neg)
1591 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1592 else {
1593 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1594 /*
1595 * Assign dialog token and tie breaker here to use the same
1596 * values in each retry within the same GO Negotiation exchange.
1597 */
1598 dev->dialog_token++;
1599 if (dev->dialog_token == 0)
1600 dev->dialog_token = 1;
1601 dev->tie_breaker = p2p->next_tie_breaker;
1602 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1603 }
1604 dev->connect_reqs = 0;
1605 dev->go_neg_req_sent = 0;
1606 dev->go_state = UNKNOWN_GO;
1607 p2p_set_dev_persistent(dev, persistent_group);
1608 p2p->go_intent = go_intent;
1609 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1610
1611 if (p2p->state != P2P_IDLE)
1612 p2p_stop_find(p2p);
1613
1614 if (p2p->after_scan_tx) {
1615 /*
1616 * We need to drop the pending frame to avoid issues with the
1617 * new GO Negotiation, e.g., when the pending frame was from a
1618 * previous attempt at starting a GO Negotiation.
1619 */
1620 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1621 os_free(p2p->after_scan_tx);
1622 p2p->after_scan_tx = NULL;
1623 }
1624
1625 dev->wps_method = wps_method;
1626 dev->oob_pw_id = oob_pw_id;
1627 dev->status = P2P_SC_SUCCESS;
1628
1629 if (p2p->p2p_scan_running) {
1630 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1631 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1632 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1633 return 0;
1634 }
1635 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1636
1637 return p2p_connect_send(p2p, dev);
1638 }
1639
1640
1641 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1642 enum p2p_wps_method wps_method,
1643 int go_intent, const u8 *own_interface_addr,
1644 unsigned int force_freq, int persistent_group,
1645 const u8 *force_ssid, size_t force_ssid_len,
1646 unsigned int pref_freq, u16 oob_pw_id)
1647 {
1648 struct p2p_device *dev;
1649
1650 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1651 " GO Intent=%d Intended Interface Address=" MACSTR
1652 " wps_method=%d persistent_group=%d oob_pw_id=%u",
1653 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1654 wps_method, persistent_group, oob_pw_id);
1655
1656 dev = p2p_get_device(p2p, peer_addr);
1657 if (dev == NULL) {
1658 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1659 MAC2STR(peer_addr));
1660 return -1;
1661 }
1662
1663 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1664 15) < 0)
1665 return -1;
1666
1667 p2p->ssid_set = 0;
1668 if (force_ssid) {
1669 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1670 force_ssid, force_ssid_len);
1671 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1672 p2p->ssid_len = force_ssid_len;
1673 p2p->ssid_set = 1;
1674 }
1675
1676 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1677 dev->flags &= ~P2P_DEV_USER_REJECTED;
1678 dev->go_neg_req_sent = 0;
1679 dev->go_state = UNKNOWN_GO;
1680 p2p_set_dev_persistent(dev, persistent_group);
1681 p2p->go_intent = go_intent;
1682 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1683
1684 dev->wps_method = wps_method;
1685 dev->oob_pw_id = oob_pw_id;
1686 dev->status = P2P_SC_SUCCESS;
1687
1688 return 0;
1689 }
1690
1691
1692 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1693 struct p2p_device *dev, struct p2p_message *msg)
1694 {
1695 os_get_reltime(&dev->last_seen);
1696
1697 p2p_copy_wps_info(p2p, dev, 0, msg);
1698
1699 if (msg->listen_channel) {
1700 int freq;
1701 freq = p2p_channel_to_freq(msg->listen_channel[3],
1702 msg->listen_channel[4]);
1703 if (freq < 0) {
1704 p2p_dbg(p2p, "Unknown peer Listen channel: "
1705 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1706 msg->listen_channel[0],
1707 msg->listen_channel[1],
1708 msg->listen_channel[2],
1709 msg->listen_channel[3],
1710 msg->listen_channel[4]);
1711 } else {
1712 p2p_dbg(p2p, "Update peer " MACSTR
1713 " Listen channel: %u -> %u MHz",
1714 MAC2STR(dev->info.p2p_device_addr),
1715 dev->listen_freq, freq);
1716 dev->listen_freq = freq;
1717 }
1718 }
1719
1720 if (msg->wfd_subelems) {
1721 wpabuf_free(dev->info.wfd_subelems);
1722 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1723 }
1724
1725 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1726 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1727 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1728 } else {
1729 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1730 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1731 "listen_freq=%d",
1732 MAC2STR(dev->info.p2p_device_addr),
1733 dev->info.dev_capab, dev->info.group_capab,
1734 dev->info.device_name, dev->listen_freq);
1735 }
1736
1737 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1738
1739 if (dev->flags & P2P_DEV_USER_REJECTED) {
1740 p2p_dbg(p2p, "Do not report rejected device");
1741 return;
1742 }
1743
1744 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1745 !(dev->flags & P2P_DEV_REPORTED_ONCE));
1746 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1747 }
1748
1749
1750 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1751 {
1752 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1753 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1754 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1755 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1756 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1757 }
1758
1759
1760 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1761 {
1762 if (p2p->ssid_set) {
1763 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len);
1764 params->ssid_len = p2p->ssid_len;
1765 } else {
1766 p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1767 }
1768 p2p->ssid_set = 0;
1769
1770 p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1771 return 0;
1772 }
1773
1774
1775 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1776 {
1777 struct p2p_go_neg_results res;
1778 int go = peer->go_state == LOCAL_GO;
1779 struct p2p_channels intersection;
1780
1781 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1782 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1783
1784 os_memset(&res, 0, sizeof(res));
1785 res.role_go = go;
1786 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1787 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1788 res.wps_method = peer->wps_method;
1789 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1790 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1791 res.persistent_group = 2;
1792 else
1793 res.persistent_group = 1;
1794 }
1795
1796 if (go) {
1797 /* Setup AP mode for WPS provisioning */
1798 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1799 p2p->op_channel);
1800 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1801 res.ssid_len = p2p->ssid_len;
1802 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1803 } else {
1804 res.freq = peer->oper_freq;
1805 if (p2p->ssid_len) {
1806 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1807 res.ssid_len = p2p->ssid_len;
1808 }
1809 }
1810
1811 p2p_channels_dump(p2p, "own channels", &p2p->channels);
1812 p2p_channels_dump(p2p, "peer channels", &peer->channels);
1813 p2p_channels_intersect(&p2p->channels, &peer->channels,
1814 &intersection);
1815 if (go) {
1816 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1817 p2p_channels_dump(p2p, "intersection after no-GO removal",
1818 &intersection);
1819 }
1820
1821 p2p_channels_to_freqs(&intersection, res.freq_list,
1822 P2P_MAX_CHANNELS);
1823
1824 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1825
1826 p2p_clear_timeout(p2p);
1827 p2p->ssid_set = 0;
1828 peer->go_neg_req_sent = 0;
1829 peer->wps_method = WPS_NOT_READY;
1830 peer->oob_pw_id = 0;
1831 wpabuf_free(peer->go_neg_conf);
1832 peer->go_neg_conf = NULL;
1833
1834 p2p_set_state(p2p, P2P_PROVISIONING);
1835 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1836 }
1837
1838
1839 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1840 const u8 *data, size_t len, int rx_freq)
1841 {
1842 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1843 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1844
1845 if (len < 1)
1846 return;
1847
1848 switch (data[0]) {
1849 case P2P_GO_NEG_REQ:
1850 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1851 break;
1852 case P2P_GO_NEG_RESP:
1853 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1854 break;
1855 case P2P_GO_NEG_CONF:
1856 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1857 break;
1858 case P2P_INVITATION_REQ:
1859 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1860 rx_freq);
1861 break;
1862 case P2P_INVITATION_RESP:
1863 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1864 break;
1865 case P2P_PROV_DISC_REQ:
1866 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1867 break;
1868 case P2P_PROV_DISC_RESP:
1869 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1870 break;
1871 case P2P_DEV_DISC_REQ:
1872 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1873 break;
1874 case P2P_DEV_DISC_RESP:
1875 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1876 break;
1877 default:
1878 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1879 data[0]);
1880 break;
1881 }
1882 }
1883
1884
1885 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1886 const u8 *sa, const u8 *bssid, const u8 *data,
1887 size_t len, int freq)
1888 {
1889 if (len < 1)
1890 return;
1891
1892 switch (data[0]) {
1893 case WLAN_PA_VENDOR_SPECIFIC:
1894 data++;
1895 len--;
1896 if (len < 4)
1897 return;
1898 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1899 return;
1900
1901 data += 4;
1902 len -= 4;
1903
1904 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1905 break;
1906 case WLAN_PA_GAS_INITIAL_REQ:
1907 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1908 break;
1909 case WLAN_PA_GAS_INITIAL_RESP:
1910 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1911 break;
1912 case WLAN_PA_GAS_COMEBACK_REQ:
1913 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1914 break;
1915 case WLAN_PA_GAS_COMEBACK_RESP:
1916 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1917 break;
1918 }
1919 }
1920
1921
1922 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1923 const u8 *bssid, u8 category,
1924 const u8 *data, size_t len, int freq)
1925 {
1926 if (category == WLAN_ACTION_PUBLIC) {
1927 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1928 return;
1929 }
1930
1931 if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1932 return;
1933
1934 if (len < 4)
1935 return;
1936
1937 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1938 return;
1939 data += 4;
1940 len -= 4;
1941
1942 /* P2P action frame */
1943 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1944 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1945
1946 if (len < 1)
1947 return;
1948 switch (data[0]) {
1949 case P2P_NOA:
1950 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1951 /* TODO */
1952 break;
1953 case P2P_PRESENCE_REQ:
1954 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1955 break;
1956 case P2P_PRESENCE_RESP:
1957 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1958 break;
1959 case P2P_GO_DISC_REQ:
1960 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1961 break;
1962 default:
1963 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1964 break;
1965 }
1966 }
1967
1968
1969 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1970 {
1971 struct p2p_data *p2p = eloop_ctx;
1972 if (p2p->go_neg_peer == NULL)
1973 return;
1974 if (p2p->pending_listen_freq) {
1975 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1976 p2p->pending_listen_freq = 0;
1977 }
1978 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1979 p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1980 /*
1981 * Set new timeout to make sure a previously set one does not expire
1982 * too quickly while waiting for the GO Negotiation to complete.
1983 */
1984 p2p_set_timeout(p2p, 0, 500000);
1985 p2p_connect_send(p2p, p2p->go_neg_peer);
1986 }
1987
1988
1989 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1990 {
1991 struct p2p_data *p2p = eloop_ctx;
1992 if (p2p->invite_peer == NULL)
1993 return;
1994 if (p2p->pending_listen_freq) {
1995 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1996 p2p->pending_listen_freq = 0;
1997 }
1998 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1999 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
2000 p2p->invite_dev_pw_id);
2001 }
2002
2003
2004 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
2005 const u8 *ie, size_t ie_len)
2006 {
2007 struct p2p_message msg;
2008 struct p2p_device *dev;
2009
2010 os_memset(&msg, 0, sizeof(msg));
2011 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
2012 {
2013 p2p_parse_free(&msg);
2014 return; /* not a P2P probe */
2015 }
2016
2017 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
2018 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
2019 != 0) {
2020 /* The Probe Request is not part of P2P Device Discovery. It is
2021 * not known whether the source address of the frame is the P2P
2022 * Device Address or P2P Interface Address. Do not add a new
2023 * peer entry based on this frames.
2024 */
2025 p2p_parse_free(&msg);
2026 return;
2027 }
2028
2029 dev = p2p_get_device(p2p, addr);
2030 if (dev) {
2031 if (dev->country[0] == 0 && msg.listen_channel)
2032 os_memcpy(dev->country, msg.listen_channel, 3);
2033 os_get_reltime(&dev->last_seen);
2034 p2p_parse_free(&msg);
2035 return; /* already known */
2036 }
2037
2038 dev = p2p_create_device(p2p, addr);
2039 if (dev == NULL) {
2040 p2p_parse_free(&msg);
2041 return;
2042 }
2043
2044 os_get_reltime(&dev->last_seen);
2045 dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
2046
2047 if (msg.listen_channel) {
2048 os_memcpy(dev->country, msg.listen_channel, 3);
2049 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
2050 msg.listen_channel[4]);
2051 }
2052
2053 p2p_copy_wps_info(p2p, dev, 1, &msg);
2054
2055 if (msg.wfd_subelems) {
2056 wpabuf_free(dev->info.wfd_subelems);
2057 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
2058 }
2059
2060 p2p_parse_free(&msg);
2061
2062 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
2063 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
2064 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
2065 dev->info.group_capab, dev->info.device_name,
2066 dev->listen_freq);
2067 }
2068
2069
2070 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
2071 const u8 *addr,
2072 struct p2p_message *msg)
2073 {
2074 struct p2p_device *dev;
2075
2076 dev = p2p_get_device(p2p, addr);
2077 if (dev) {
2078 os_get_reltime(&dev->last_seen);
2079 return dev; /* already known */
2080 }
2081
2082 dev = p2p_create_device(p2p, addr);
2083 if (dev == NULL)
2084 return NULL;
2085
2086 p2p_add_dev_info(p2p, addr, dev, msg);
2087
2088 return dev;
2089 }
2090
2091
2092 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
2093 {
2094 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
2095 return 1;
2096 if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
2097 WPA_GET_BE32(&req_dev_type[2]) == 0 &&
2098 WPA_GET_BE16(&req_dev_type[6]) == 0)
2099 return 1; /* Category match with wildcard OUI/sub-category */
2100 return 0;
2101 }
2102
2103
2104 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
2105 size_t num_req_dev_type)
2106 {
2107 size_t i;
2108 for (i = 0; i < num_req_dev_type; i++) {
2109 if (dev_type_match(dev_type, req_dev_type[i]))
2110 return 1;
2111 }
2112 return 0;
2113 }
2114
2115
2116 /**
2117 * p2p_match_dev_type - Match local device type with requested type
2118 * @p2p: P2P module context from p2p_init()
2119 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
2120 * Returns: 1 on match, 0 on mismatch
2121 *
2122 * This function can be used to match the Requested Device Type attribute in
2123 * WPS IE with the local device types for deciding whether to reply to a Probe
2124 * Request frame.
2125 */
2126 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2127 {
2128 struct wps_parse_attr attr;
2129 size_t i;
2130
2131 if (wps_parse_msg(wps, &attr))
2132 return 1; /* assume no Requested Device Type attributes */
2133
2134 if (attr.num_req_dev_type == 0)
2135 return 1; /* no Requested Device Type attributes -> match */
2136
2137 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2138 attr.num_req_dev_type))
2139 return 1; /* Own Primary Device Type matches */
2140
2141 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2142 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2143 attr.req_dev_type,
2144 attr.num_req_dev_type))
2145 return 1; /* Own Secondary Device Type matches */
2146 }
2147
2148 /* No matching device type found */
2149 return 0;
2150 }
2151
2152
2153 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p,
2154 const u8 *query_hash,
2155 u8 query_count)
2156 {
2157 struct wpabuf *buf;
2158 u8 *len;
2159 int pw_id = -1;
2160 size_t extra = 0;
2161
2162 #ifdef CONFIG_WIFI_DISPLAY
2163 if (p2p->wfd_ie_probe_resp)
2164 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2165 #endif /* CONFIG_WIFI_DISPLAY */
2166
2167 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2168 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2169
2170 if (query_count)
2171 extra += MAX_SVC_ADV_IE_LEN;
2172
2173 buf = wpabuf_alloc(1000 + extra);
2174 if (buf == NULL)
2175 return NULL;
2176
2177 if (p2p->go_neg_peer) {
2178 /* Advertise immediate availability of WPS credential */
2179 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2180 }
2181
2182 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2183 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2184 wpabuf_free(buf);
2185 return NULL;
2186 }
2187
2188 #ifdef CONFIG_WIFI_DISPLAY
2189 if (p2p->wfd_ie_probe_resp)
2190 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2191 #endif /* CONFIG_WIFI_DISPLAY */
2192
2193 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2194 wpabuf_put_buf(buf,
2195 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2196
2197 /* P2P IE */
2198 len = p2p_buf_add_ie_hdr(buf);
2199 p2p_buf_add_capability(buf, p2p->dev_capab &
2200 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2201 if (p2p->ext_listen_interval)
2202 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2203 p2p->ext_listen_interval);
2204 p2p_buf_add_device_info(buf, p2p, NULL);
2205 p2p_buf_update_ie_hdr(buf, len);
2206
2207 if (query_count) {
2208 p2p_buf_add_service_instance(buf, p2p, query_count, query_hash,
2209 p2p->p2ps_adv_list);
2210 }
2211
2212 return buf;
2213 }
2214
2215
2216 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash)
2217 {
2218 struct p2ps_advertisement *adv_data;
2219 int any_wfa;
2220
2221 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list);
2222
2223 /* Wildcard org.wi-fi.wfds matches any WFA spec defined service */
2224 any_wfa = os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0;
2225
2226 adv_data = p2p->p2ps_adv_list;
2227 while (adv_data) {
2228 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0)
2229 return 1; /* exact hash match */
2230 if (any_wfa &&
2231 os_strncmp(adv_data->svc_name, P2PS_WILD_HASH_STR,
2232 os_strlen(P2PS_WILD_HASH_STR)) == 0)
2233 return 1; /* WFA service match */
2234 adv_data = adv_data->next;
2235 }
2236
2237 return 0;
2238 }
2239
2240
2241 static enum p2p_probe_req_status
2242 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2243 const u8 *bssid, const u8 *ie, size_t ie_len,
2244 unsigned int rx_freq)
2245 {
2246 struct ieee802_11_elems elems;
2247 struct wpabuf *buf;
2248 struct ieee80211_mgmt *resp;
2249 struct p2p_message msg;
2250 struct wpabuf *ies;
2251 u8 channel, op_class;
2252
2253 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2254 ParseFailed) {
2255 /* Ignore invalid Probe Request frames */
2256 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2257 return P2P_PREQ_MALFORMED;
2258 }
2259
2260 if (elems.p2p == NULL) {
2261 /* not a P2P probe - ignore it */
2262 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2263 return P2P_PREQ_NOT_P2P;
2264 }
2265
2266 if (dst && !is_broadcast_ether_addr(dst) &&
2267 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2268 /* Not sent to the broadcast address or our P2P Device Address
2269 */
2270 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2271 MAC2STR(dst));
2272 return P2P_PREQ_NOT_PROCESSED;
2273 }
2274
2275 if (bssid && !is_broadcast_ether_addr(bssid)) {
2276 /* Not sent to the Wildcard BSSID */
2277 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2278 MAC2STR(bssid));
2279 return P2P_PREQ_NOT_PROCESSED;
2280 }
2281
2282 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2283 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2284 0) {
2285 /* not using P2P Wildcard SSID - ignore */
2286 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2287 return P2P_PREQ_NOT_PROCESSED;
2288 }
2289
2290 if (supp_rates_11b_only(&elems)) {
2291 /* Indicates support for 11b rates only */
2292 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2293 return P2P_PREQ_NOT_P2P;
2294 }
2295
2296 os_memset(&msg, 0, sizeof(msg));
2297 if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2298 /* Could not parse P2P attributes */
2299 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2300 return P2P_PREQ_NOT_P2P;
2301 }
2302
2303 if (msg.service_hash && msg.service_hash_count) {
2304 const u8 *hash = msg.service_hash;
2305 u8 i;
2306 int p2ps_svc_found = 0;
2307
2308 p2p_dbg(p2p, "in_listen=%d drv_in_listen=%d when received P2PS Probe Request at %u MHz; own Listen channel %u, pending listen freq %u MHz",
2309 p2p->in_listen, p2p->drv_in_listen, rx_freq,
2310 p2p->cfg->channel, p2p->pending_listen_freq);
2311
2312 if (!p2p->in_listen && !p2p->drv_in_listen &&
2313 p2p->pending_listen_freq && rx_freq &&
2314 rx_freq != p2p->pending_listen_freq) {
2315 p2p_dbg(p2p, "Do not reply to Probe Request frame that was received on %u MHz while waiting to start Listen state on %u MHz",
2316 rx_freq, p2p->pending_listen_freq);
2317 p2p_parse_free(&msg);
2318 return P2P_PREQ_NOT_LISTEN;
2319 }
2320
2321 for (i = 0; i < msg.service_hash_count; i++) {
2322 if (p2p_service_find_asp(p2p, hash)) {
2323 p2p_dbg(p2p, "Service Hash match found: "
2324 MACSTR, MAC2STR(hash));
2325 p2ps_svc_found = 1;
2326 break;
2327 }
2328 hash += P2PS_HASH_LEN;
2329 }
2330
2331 /* Probed hash unknown */
2332 if (!p2ps_svc_found) {
2333 p2p_dbg(p2p, "No Service Hash match found");
2334 p2p_parse_free(&msg);
2335 return P2P_PREQ_NOT_PROCESSED;
2336 }
2337 } else {
2338 /* This is not a P2PS Probe Request */
2339 p2p_dbg(p2p, "No P2PS Hash in Probe Request");
2340
2341 if (!p2p->in_listen || !p2p->drv_in_listen) {
2342 /* not in Listen state - ignore Probe Request */
2343 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2344 p2p->in_listen, p2p->drv_in_listen);
2345 p2p_parse_free(&msg);
2346 return P2P_PREQ_NOT_LISTEN;
2347 }
2348 }
2349
2350 if (msg.device_id &&
2351 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2352 /* Device ID did not match */
2353 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2354 MAC2STR(msg.device_id));
2355 p2p_parse_free(&msg);
2356 return P2P_PREQ_NOT_PROCESSED;
2357 }
2358
2359 /* Check Requested Device Type match */
2360 if (msg.wps_attributes &&
2361 !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2362 /* No match with Requested Device Type */
2363 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2364 p2p_parse_free(&msg);
2365 return P2P_PREQ_NOT_PROCESSED;
2366 }
2367
2368 if (!p2p->cfg->send_probe_resp) {
2369 /* Response generated elsewhere */
2370 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2371 p2p_parse_free(&msg);
2372 return P2P_PREQ_NOT_PROCESSED;
2373 }
2374
2375 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2376
2377 /*
2378 * We do not really have a specific BSS that this frame is advertising,
2379 * so build a frame that has some information in valid format. This is
2380 * really only used for discovery purposes, not to learn exact BSS
2381 * parameters.
2382 */
2383 ies = p2p_build_probe_resp_ies(p2p, msg.service_hash,
2384 msg.service_hash_count);
2385 p2p_parse_free(&msg);
2386 if (ies == NULL)
2387 return P2P_PREQ_NOT_PROCESSED;
2388
2389 buf = wpabuf_alloc(200 + wpabuf_len(ies));
2390 if (buf == NULL) {
2391 wpabuf_free(ies);
2392 return P2P_PREQ_NOT_PROCESSED;
2393 }
2394
2395 resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt,
2396 u.probe_resp.variable));
2397
2398 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2399 (WLAN_FC_STYPE_PROBE_RESP << 4));
2400 os_memcpy(resp->da, addr, ETH_ALEN);
2401 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2402 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2403 resp->u.probe_resp.beacon_int = host_to_le16(100);
2404 /* hardware or low-level driver will setup seq_ctrl and timestamp */
2405 resp->u.probe_resp.capab_info =
2406 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2407 WLAN_CAPABILITY_PRIVACY |
2408 WLAN_CAPABILITY_SHORT_SLOT_TIME);
2409
2410 wpabuf_put_u8(buf, WLAN_EID_SSID);
2411 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2412 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2413
2414 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2415 wpabuf_put_u8(buf, 8);
2416 wpabuf_put_u8(buf, (60 / 5) | 0x80);
2417 wpabuf_put_u8(buf, 90 / 5);
2418 wpabuf_put_u8(buf, (120 / 5) | 0x80);
2419 wpabuf_put_u8(buf, 180 / 5);
2420 wpabuf_put_u8(buf, (240 / 5) | 0x80);
2421 wpabuf_put_u8(buf, 360 / 5);
2422 wpabuf_put_u8(buf, 480 / 5);
2423 wpabuf_put_u8(buf, 540 / 5);
2424
2425 if (!rx_freq) {
2426 channel = p2p->cfg->channel;
2427 } else if (p2p_freq_to_channel(rx_freq, &op_class, &channel)) {
2428 wpabuf_free(ies);
2429 wpabuf_free(buf);
2430 return P2P_PREQ_NOT_PROCESSED;
2431 }
2432
2433 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2434 wpabuf_put_u8(buf, 1);
2435 wpabuf_put_u8(buf, channel);
2436
2437 wpabuf_put_buf(buf, ies);
2438 wpabuf_free(ies);
2439
2440 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf, rx_freq);
2441
2442 wpabuf_free(buf);
2443
2444 return P2P_PREQ_PROCESSED;
2445 }
2446
2447
2448 enum p2p_probe_req_status
2449 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2450 const u8 *bssid, const u8 *ie, size_t ie_len,
2451 unsigned int rx_freq)
2452 {
2453 enum p2p_probe_req_status res;
2454
2455 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2456
2457 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq);
2458 if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED)
2459 return res;
2460
2461 /*
2462 * Activate a pending GO Negotiation/Invite flow if a received Probe
2463 * Request frame is from an expected peer. Some devices may share the
2464 * same address for P2P and non-P2P STA running simultaneously. The
2465 * P2P_PREQ_PROCESSED and P2P_PREQ_NOT_PROCESSED p2p_reply_probe()
2466 * return values verified above ensure we are handling a Probe Request
2467 * frame from a P2P peer.
2468 */
2469 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2470 p2p->go_neg_peer &&
2471 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2472 == 0 &&
2473 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2474 /* Received a Probe Request from GO Negotiation peer */
2475 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2476 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2477 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2478 return res;
2479 }
2480
2481 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2482 p2p->invite_peer &&
2483 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2484 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2485 == 0) {
2486 /* Received a Probe Request from Invite peer */
2487 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2488 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2489 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2490 return res;
2491 }
2492
2493 return res;
2494 }
2495
2496
2497 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2498 u8 *buf, size_t len, struct wpabuf *p2p_ie)
2499 {
2500 struct wpabuf *tmp;
2501 u8 *lpos;
2502 size_t tmplen;
2503 int res;
2504 u8 group_capab;
2505 struct p2p_message msg;
2506
2507 if (p2p_ie == NULL)
2508 return 0; /* WLAN AP is not a P2P manager */
2509
2510 os_memset(&msg, 0, sizeof(msg));
2511 if (p2p_parse_p2p_ie(p2p_ie, &msg) < 0)
2512 return 0;
2513
2514 p2p_dbg(p2p, "BSS P2P manageability %s",
2515 msg.manageability ? "enabled" : "disabled");
2516
2517 if (!msg.manageability)
2518 return 0;
2519
2520 /*
2521 * (Re)Association Request - P2P IE
2522 * P2P Capability attribute (shall be present)
2523 * P2P Interface attribute (present if concurrent device and
2524 * P2P Management is enabled)
2525 */
2526 tmp = wpabuf_alloc(200);
2527 if (tmp == NULL)
2528 return -1;
2529
2530 lpos = p2p_buf_add_ie_hdr(tmp);
2531 group_capab = 0;
2532 if (p2p->num_groups > 0) {
2533 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2534 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2535 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2536 p2p->cross_connect)
2537 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2538 }
2539 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2540 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2541 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2542 p2p_buf_add_p2p_interface(tmp, p2p);
2543 p2p_buf_update_ie_hdr(tmp, lpos);
2544
2545 tmplen = wpabuf_len(tmp);
2546 if (tmplen > len)
2547 res = -1;
2548 else {
2549 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2550 res = tmplen;
2551 }
2552 wpabuf_free(tmp);
2553
2554 return res;
2555 }
2556
2557
2558 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2559 size_t len, int p2p_group, struct wpabuf *p2p_ie)
2560 {
2561 struct wpabuf *tmp;
2562 u8 *lpos;
2563 struct p2p_device *peer;
2564 size_t tmplen;
2565 int res;
2566 size_t extra = 0;
2567
2568 if (!p2p_group)
2569 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2570
2571 #ifdef CONFIG_WIFI_DISPLAY
2572 if (p2p->wfd_ie_assoc_req)
2573 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2574 #endif /* CONFIG_WIFI_DISPLAY */
2575
2576 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2577 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2578
2579 /*
2580 * (Re)Association Request - P2P IE
2581 * P2P Capability attribute (shall be present)
2582 * Extended Listen Timing (may be present)
2583 * P2P Device Info attribute (shall be present)
2584 */
2585 tmp = wpabuf_alloc(200 + extra);
2586 if (tmp == NULL)
2587 return -1;
2588
2589 #ifdef CONFIG_WIFI_DISPLAY
2590 if (p2p->wfd_ie_assoc_req)
2591 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2592 #endif /* CONFIG_WIFI_DISPLAY */
2593
2594 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2595 wpabuf_put_buf(tmp,
2596 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2597
2598 peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2599
2600 lpos = p2p_buf_add_ie_hdr(tmp);
2601 p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2602 if (p2p->ext_listen_interval)
2603 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2604 p2p->ext_listen_interval);
2605 p2p_buf_add_device_info(tmp, p2p, peer);
2606 p2p_buf_update_ie_hdr(tmp, lpos);
2607
2608 tmplen = wpabuf_len(tmp);
2609 if (tmplen > len)
2610 res = -1;
2611 else {
2612 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2613 res = tmplen;
2614 }
2615 wpabuf_free(tmp);
2616
2617 return res;
2618 }
2619
2620
2621 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2622 {
2623 struct wpabuf *p2p_ie;
2624 int ret;
2625
2626 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2627 if (p2p_ie == NULL)
2628 return 0;
2629
2630 ret = p2p_attr_text(p2p_ie, buf, end);
2631 wpabuf_free(p2p_ie);
2632 return ret;
2633 }
2634
2635
2636 struct p2ps_advertisement *
2637 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id)
2638 {
2639 struct p2ps_advertisement *adv_data;
2640
2641 if (!p2p)
2642 return NULL;
2643
2644 adv_data = p2p->p2ps_adv_list;
2645 while (adv_data) {
2646 if (adv_data->id == adv_id)
2647 return adv_data;
2648 adv_data = adv_data->next;
2649 }
2650
2651 return NULL;
2652 }
2653
2654
2655 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id)
2656 {
2657 struct p2ps_advertisement *adv_data;
2658 struct p2ps_advertisement **prior;
2659
2660 if (!p2p)
2661 return -1;
2662
2663 adv_data = p2p->p2ps_adv_list;
2664 prior = &p2p->p2ps_adv_list;
2665 while (adv_data) {
2666 if (adv_data->id == adv_id) {
2667 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id);
2668 *prior = adv_data->next;
2669 os_free(adv_data);
2670 return 0;
2671 }
2672 prior = &adv_data->next;
2673 adv_data = adv_data->next;
2674 }
2675
2676 return -1;
2677 }
2678
2679
2680 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id,
2681 const char *adv_str, u8 svc_state, u16 config_methods,
2682 const char *svc_info, const u8 *cpt_priority)
2683 {
2684 struct p2ps_advertisement *adv_data, *tmp, **prev;
2685 u8 buf[P2PS_HASH_LEN];
2686 size_t adv_data_len, adv_len, info_len = 0;
2687 int i;
2688
2689 if (!p2p || !adv_str || !adv_str[0] || !cpt_priority)
2690 return -1;
2691
2692 if (!(config_methods & p2p->cfg->config_methods)) {
2693 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x",
2694 config_methods, p2p->cfg->config_methods);
2695 return -1;
2696 }
2697
2698 if (!p2ps_gen_hash(p2p, adv_str, buf))
2699 return -1;
2700
2701 if (svc_info)
2702 info_len = os_strlen(svc_info);
2703 adv_len = os_strlen(adv_str);
2704 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 +
2705 info_len + 1;
2706
2707 adv_data = os_zalloc(adv_data_len);
2708 if (!adv_data)
2709 return -1;
2710
2711 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN);
2712 adv_data->id = adv_id;
2713 adv_data->state = svc_state;
2714 adv_data->config_methods = config_methods & p2p->cfg->config_methods;
2715 adv_data->auto_accept = (u8) auto_accept;
2716 os_memcpy(adv_data->svc_name, adv_str, adv_len);
2717
2718 for (i = 0; cpt_priority[i] && i < P2PS_FEATURE_CAPAB_CPT_MAX; i++) {
2719 adv_data->cpt_priority[i] = cpt_priority[i];
2720 adv_data->cpt_mask |= cpt_priority[i];
2721 }
2722
2723 if (svc_info && info_len) {
2724 adv_data->svc_info = &adv_data->svc_name[adv_len + 1];
2725 os_memcpy(adv_data->svc_info, svc_info, info_len);
2726 }
2727
2728 /*
2729 * Group Advertisements by service string. They do not need to be
2730 * sorted, but groups allow easier Probe Response instance grouping
2731 */
2732 tmp = p2p->p2ps_adv_list;
2733 prev = &p2p->p2ps_adv_list;
2734 while (tmp) {
2735 if (tmp->id == adv_data->id) {
2736 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) {
2737 os_free(adv_data);
2738 return -1;
2739 }
2740 adv_data->next = tmp->next;
2741 *prev = adv_data;
2742 os_free(tmp);
2743 goto inserted;
2744 } else {
2745 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) {
2746 adv_data->next = tmp->next;
2747 tmp->next = adv_data;
2748 goto inserted;
2749 }
2750 }
2751 prev = &tmp->next;
2752 tmp = tmp->next;
2753 }
2754
2755 /* No svc_name match found */
2756 adv_data->next = p2p->p2ps_adv_list;
2757 p2p->p2ps_adv_list = adv_data;
2758
2759 inserted:
2760 p2p_dbg(p2p,
2761 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s' cpt_mask=0x%x",
2762 adv_id, adv_data->config_methods, svc_state, adv_str,
2763 adv_data->cpt_mask);
2764
2765 return 0;
2766 }
2767
2768
2769 void p2p_service_flush_asp(struct p2p_data *p2p)
2770 {
2771 struct p2ps_advertisement *adv, *prev;
2772
2773 if (!p2p)
2774 return;
2775
2776 adv = p2p->p2ps_adv_list;
2777 while (adv) {
2778 prev = adv;
2779 adv = adv->next;
2780 os_free(prev);
2781 }
2782
2783 p2p->p2ps_adv_list = NULL;
2784 p2p_dbg(p2p, "All ASP advertisements flushed");
2785 }
2786
2787
2788 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2789 {
2790 struct p2p_message msg;
2791
2792 os_memset(&msg, 0, sizeof(msg));
2793 if (p2p_parse_p2p_ie(p2p_ie, &msg))
2794 return -1;
2795
2796 if (msg.p2p_device_addr) {
2797 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2798 return 0;
2799 } else if (msg.device_id) {
2800 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2801 return 0;
2802 }
2803 return -1;
2804 }
2805
2806
2807 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2808 {
2809 struct wpabuf *p2p_ie;
2810 int ret;
2811
2812 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2813 P2P_IE_VENDOR_TYPE);
2814 if (p2p_ie == NULL)
2815 return -1;
2816 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2817 wpabuf_free(p2p_ie);
2818 return ret;
2819 }
2820
2821
2822 static void p2p_clear_go_neg(struct p2p_data *p2p)
2823 {
2824 p2p->go_neg_peer = NULL;
2825 p2p_clear_timeout(p2p);
2826 p2p_set_state(p2p, P2P_IDLE);
2827 }
2828
2829
2830 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2831 {
2832 if (p2p->go_neg_peer == NULL) {
2833 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2834 return; /* No pending Group Formation */
2835 }
2836
2837 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2838 0) {
2839 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2840 MACSTR " (GO Negotiation peer " MACSTR ")",
2841 MAC2STR(mac_addr),
2842 MAC2STR(p2p->go_neg_peer->intended_addr));
2843 return; /* Ignore unexpected peer address */
2844 }
2845
2846 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2847 MAC2STR(mac_addr));
2848
2849 p2p_clear_go_neg(p2p);
2850 }
2851
2852
2853 void p2p_group_formation_failed(struct p2p_data *p2p)
2854 {
2855 if (p2p->go_neg_peer == NULL) {
2856 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2857 return; /* No pending Group Formation */
2858 }
2859
2860 p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2861 MAC2STR(p2p->go_neg_peer->intended_addr));
2862
2863 p2p_clear_go_neg(p2p);
2864 }
2865
2866
2867 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2868 {
2869 struct p2p_data *p2p;
2870
2871 if (cfg->max_peers < 1 ||
2872 cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2873 return NULL;
2874
2875 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2876 if (p2p == NULL)
2877 return NULL;
2878 p2p->cfg = (struct p2p_config *) (p2p + 1);
2879 os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2880 if (cfg->dev_name)
2881 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2882 if (cfg->manufacturer)
2883 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2884 if (cfg->model_name)
2885 p2p->cfg->model_name = os_strdup(cfg->model_name);
2886 if (cfg->model_number)
2887 p2p->cfg->model_number = os_strdup(cfg->model_number);
2888 if (cfg->serial_number)
2889 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2890 if (cfg->pref_chan) {
2891 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2892 sizeof(struct p2p_channel));
2893 if (p2p->cfg->pref_chan) {
2894 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2895 cfg->num_pref_chan *
2896 sizeof(struct p2p_channel));
2897 } else
2898 p2p->cfg->num_pref_chan = 0;
2899 }
2900
2901 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);
2902
2903 p2p->min_disc_int = 1;
2904 p2p->max_disc_int = 3;
2905 p2p->max_disc_tu = -1;
2906
2907 if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2908 p2p->next_tie_breaker = 0;
2909 p2p->next_tie_breaker &= 0x01;
2910 if (cfg->sd_request)
2911 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2912 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2913 if (cfg->concurrent_operations)
2914 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2915 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2916
2917 dl_list_init(&p2p->devices);
2918
2919 p2p->go_timeout = 100;
2920 p2p->client_timeout = 20;
2921 p2p->num_p2p_sd_queries = 0;
2922
2923 p2p_dbg(p2p, "initialized");
2924 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2925 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2926
2927 return p2p;
2928 }
2929
2930
2931 void p2p_deinit(struct p2p_data *p2p)
2932 {
2933 #ifdef CONFIG_WIFI_DISPLAY
2934 wpabuf_free(p2p->wfd_ie_beacon);
2935 wpabuf_free(p2p->wfd_ie_probe_req);
2936 wpabuf_free(p2p->wfd_ie_probe_resp);
2937 wpabuf_free(p2p->wfd_ie_assoc_req);
2938 wpabuf_free(p2p->wfd_ie_invitation);
2939 wpabuf_free(p2p->wfd_ie_prov_disc_req);
2940 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2941 wpabuf_free(p2p->wfd_ie_go_neg);
2942 wpabuf_free(p2p->wfd_dev_info);
2943 wpabuf_free(p2p->wfd_assoc_bssid);
2944 wpabuf_free(p2p->wfd_coupled_sink_info);
2945 #endif /* CONFIG_WIFI_DISPLAY */
2946
2947 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2948 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2949 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2950 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2951 p2p_flush(p2p);
2952 p2p_free_req_dev_types(p2p);
2953 os_free(p2p->cfg->dev_name);
2954 os_free(p2p->cfg->manufacturer);
2955 os_free(p2p->cfg->model_name);
2956 os_free(p2p->cfg->model_number);
2957 os_free(p2p->cfg->serial_number);
2958 os_free(p2p->cfg->pref_chan);
2959 os_free(p2p->groups);
2960 p2ps_prov_free(p2p);
2961 wpabuf_free(p2p->sd_resp);
2962 os_free(p2p->after_scan_tx);
2963 p2p_remove_wps_vendor_extensions(p2p);
2964 os_free(p2p->no_go_freq.range);
2965 p2p_service_flush_asp(p2p);
2966
2967 os_free(p2p);
2968 }
2969
2970
2971 void p2p_flush(struct p2p_data *p2p)
2972 {
2973 struct p2p_device *dev, *prev;
2974 p2p_stop_find(p2p);
2975 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2976 list) {
2977 dl_list_del(&dev->list);
2978 p2p_device_free(p2p, dev);
2979 }
2980 p2p_free_sd_queries(p2p);
2981 os_free(p2p->after_scan_tx);
2982 p2p->after_scan_tx = NULL;
2983 p2p->ssid_set = 0;
2984 }
2985
2986
2987 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2988 {
2989 struct p2p_device *dev;
2990
2991 dev = p2p_get_device(p2p, addr);
2992 if (dev == NULL)
2993 return -1;
2994
2995 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2996
2997 if (p2p->go_neg_peer == dev) {
2998 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2999 p2p->go_neg_peer = NULL;
3000 }
3001
3002 dev->wps_method = WPS_NOT_READY;
3003 dev->oob_pw_id = 0;
3004 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
3005 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
3006
3007 /* Check if after_scan_tx is for this peer. If so free it */
3008 if (p2p->after_scan_tx &&
3009 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
3010 os_free(p2p->after_scan_tx);
3011 p2p->after_scan_tx = NULL;
3012 }
3013
3014 return 0;
3015 }
3016
3017
3018 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
3019 {
3020 os_free(p2p->cfg->dev_name);
3021 if (dev_name) {
3022 p2p->cfg->dev_name = os_strdup(dev_name);
3023 if (p2p->cfg->dev_name == NULL)
3024 return -1;
3025 } else
3026 p2p->cfg->dev_name = NULL;
3027 return 0;
3028 }
3029
3030
3031 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
3032 {
3033 os_free(p2p->cfg->manufacturer);
3034 p2p->cfg->manufacturer = NULL;
3035 if (manufacturer) {
3036 p2p->cfg->manufacturer = os_strdup(manufacturer);
3037 if (p2p->cfg->manufacturer == NULL)
3038 return -1;
3039 }
3040
3041 return 0;
3042 }
3043
3044
3045 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
3046 {
3047 os_free(p2p->cfg->model_name);
3048 p2p->cfg->model_name = NULL;
3049 if (model_name) {
3050 p2p->cfg->model_name = os_strdup(model_name);
3051 if (p2p->cfg->model_name == NULL)
3052 return -1;
3053 }
3054
3055 return 0;
3056 }
3057
3058
3059 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
3060 {
3061 os_free(p2p->cfg->model_number);
3062 p2p->cfg->model_number = NULL;
3063 if (model_number) {
3064 p2p->cfg->model_number = os_strdup(model_number);
3065 if (p2p->cfg->model_number == NULL)
3066 return -1;
3067 }
3068
3069 return 0;
3070 }
3071
3072
3073 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
3074 {
3075 os_free(p2p->cfg->serial_number);
3076 p2p->cfg->serial_number = NULL;
3077 if (serial_number) {
3078 p2p->cfg->serial_number = os_strdup(serial_number);
3079 if (p2p->cfg->serial_number == NULL)
3080 return -1;
3081 }
3082
3083 return 0;
3084 }
3085
3086
3087 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
3088 {
3089 p2p->cfg->config_methods = config_methods;
3090 }
3091
3092
3093 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
3094 {
3095 os_memcpy(p2p->cfg->uuid, uuid, 16);
3096 }
3097
3098
3099 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
3100 {
3101 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
3102 return 0;
3103 }
3104
3105
3106 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
3107 size_t num_dev_types)
3108 {
3109 if (num_dev_types > P2P_SEC_DEVICE_TYPES)
3110 num_dev_types = P2P_SEC_DEVICE_TYPES;
3111 p2p->cfg->num_sec_dev_types = num_dev_types;
3112 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
3113 return 0;
3114 }
3115
3116
3117 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
3118 {
3119 int i;
3120
3121 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3122 wpabuf_free(p2p->wps_vendor_ext[i]);
3123 p2p->wps_vendor_ext[i] = NULL;
3124 }
3125 }
3126
3127
3128 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
3129 const struct wpabuf *vendor_ext)
3130 {
3131 int i;
3132
3133 if (vendor_ext == NULL)
3134 return -1;
3135
3136 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3137 if (p2p->wps_vendor_ext[i] == NULL)
3138 break;
3139 }
3140 if (i >= P2P_MAX_WPS_VENDOR_EXT)
3141 return -1;
3142
3143 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
3144 if (p2p->wps_vendor_ext[i] == NULL)
3145 return -1;
3146
3147 return 0;
3148 }
3149
3150
3151 int p2p_set_country(struct p2p_data *p2p, const char *country)
3152 {
3153 os_memcpy(p2p->cfg->country, country, 3);
3154 return 0;
3155 }
3156
3157
3158 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
3159 {
3160 if (dev->sd_pending_bcast_queries == 0) {
3161 /* Initialize with total number of registered broadcast
3162 * SD queries. */
3163 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
3164 }
3165
3166 if (p2p_start_sd(p2p, dev) == 0)
3167 return 1;
3168
3169 if (dev->req_config_methods &&
3170 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
3171 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3172 MACSTR " (config methods 0x%x)",
3173 MAC2STR(dev->info.p2p_device_addr),
3174 dev->req_config_methods);
3175 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
3176 return 1;
3177 }
3178
3179 return 0;
3180 }
3181
3182
3183 void p2p_continue_find(struct p2p_data *p2p)
3184 {
3185 struct p2p_device *dev;
3186 int found;
3187
3188 p2p_set_state(p2p, P2P_SEARCH);
3189
3190 /* Continue from the device following the last iteration */
3191 found = 0;
3192 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3193 if (dev == p2p->last_p2p_find_oper) {
3194 found = 1;
3195 continue;
3196 }
3197 if (!found)
3198 continue;
3199 if (p2p_pre_find_operation(p2p, dev) > 0) {
3200 p2p->last_p2p_find_oper = dev;
3201 return;
3202 }
3203 }
3204
3205 /*
3206 * Wrap around to the beginning of the list and continue until the last
3207 * iteration device.
3208 */
3209 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3210 if (p2p_pre_find_operation(p2p, dev) > 0) {
3211 p2p->last_p2p_find_oper = dev;
3212 return;
3213 }
3214 if (dev == p2p->last_p2p_find_oper)
3215 break;
3216 }
3217
3218 p2p_listen_in_find(p2p, 1);
3219 }
3220
3221
3222 static void p2p_sd_cb(struct p2p_data *p2p, int success)
3223 {
3224 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
3225 success);
3226 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3227
3228 if (!success) {
3229 if (p2p->sd_peer)
3230 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3231 p2p->sd_peer = NULL;
3232 if (p2p->state != P2P_IDLE)
3233 p2p_continue_find(p2p);
3234 return;
3235 }
3236
3237 if (p2p->sd_peer == NULL) {
3238 p2p_dbg(p2p, "No SD peer entry known");
3239 if (p2p->state != P2P_IDLE)
3240 p2p_continue_find(p2p);
3241 return;
3242 }
3243
3244 if (p2p->sd_query && p2p->sd_query->for_all_peers) {
3245 /* Update the pending broadcast SD query count for this device
3246 */
3247 p2p->sd_peer->sd_pending_bcast_queries--;
3248
3249 /*
3250 * If there are no pending broadcast queries for this device,
3251 * mark it as done (-1).
3252 */
3253 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
3254 p2p->sd_peer->sd_pending_bcast_queries = -1;
3255 }
3256
3257 /* Wait for response from the peer */
3258 p2p_set_state(p2p, P2P_SD_DURING_FIND);
3259 p2p_set_timeout(p2p, 0, 200000);
3260 }
3261
3262
3263 /**
3264 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
3265 * @p2p: P2P module context from p2p_init()
3266 */
3267 static void p2p_retry_pd(struct p2p_data *p2p)
3268 {
3269 struct p2p_device *dev;
3270
3271 /*
3272 * Retry the prov disc req attempt only for the peer that the user had
3273 * requested.
3274 */
3275
3276 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3277 if (os_memcmp(p2p->pending_pd_devaddr,
3278 dev->info.p2p_device_addr, ETH_ALEN) != 0)
3279 continue;
3280 if (!dev->req_config_methods)
3281 continue;
3282
3283 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3284 MACSTR " (config methods 0x%x)",
3285 MAC2STR(dev->info.p2p_device_addr),
3286 dev->req_config_methods);
3287 p2p_send_prov_disc_req(p2p, dev,
3288 dev->flags & P2P_DEV_PD_FOR_JOIN,
3289 p2p->pd_force_freq);
3290 return;
3291 }
3292 }
3293
3294
3295 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
3296 {
3297 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
3298 success);
3299
3300 /*
3301 * Postpone resetting the pending action state till after we actually
3302 * time out. This allows us to take some action like notifying any
3303 * interested parties about no response to the request.
3304 *
3305 * When the timer (below) goes off we check in IDLE, SEARCH, or
3306 * LISTEN_ONLY state, which are the only allowed states to issue a PD
3307 * requests in, if this was still pending and then raise notification.
3308 */
3309
3310 if (!success) {
3311 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3312
3313 if (p2p->user_initiated_pd &&
3314 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
3315 {
3316 /* Retry request from timeout to avoid busy loops */
3317 p2p->pending_action_state = P2P_PENDING_PD;
3318 p2p_set_timeout(p2p, 0, 50000);
3319 } else if (p2p->state != P2P_IDLE)
3320 p2p_continue_find(p2p);
3321 else if (p2p->user_initiated_pd) {
3322 p2p->pending_action_state = P2P_PENDING_PD;
3323 p2p_set_timeout(p2p, 0, 300000);
3324 }
3325 return;
3326 }
3327
3328 /*
3329 * This postponing, of resetting pending_action_state, needs to be
3330 * done only for user initiated PD requests and not internal ones.
3331 */
3332 if (p2p->user_initiated_pd)
3333 p2p->pending_action_state = P2P_PENDING_PD;
3334 else
3335 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3336
3337 /* Wait for response from the peer */
3338 if (p2p->state == P2P_SEARCH)
3339 p2p_set_state(p2p, P2P_PD_DURING_FIND);
3340 p2p_set_timeout(p2p, 0, 200000);
3341 }
3342
3343
3344 static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p)
3345 {
3346 if (p2p->after_scan_tx_in_progress) {
3347 p2p->after_scan_tx_in_progress = 0;
3348 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3349 p2p_run_after_scan(p2p))
3350 return 1;
3351 if (p2p->state == P2P_SEARCH) {
3352 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3353 p2p_continue_find(p2p);
3354 }
3355 }
3356
3357 return 0;
3358 }
3359
3360
3361 static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success)
3362 {
3363 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d",
3364 success);
3365
3366 if (p2p->send_action_in_progress) {
3367 p2p->send_action_in_progress = 0;
3368 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3369 }
3370
3371 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3372
3373 if (!success)
3374 goto continue_search;
3375
3376 if (!p2p->cfg->prov_disc_resp_cb ||
3377 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1)
3378 goto continue_search;
3379
3380 p2p_dbg(p2p,
3381 "Post-Provision Discovery operations started - do not try to continue other P2P operations");
3382 return;
3383
3384 continue_search:
3385 p2p_check_after_scan_tx_continuation(p2p);
3386 }
3387
3388
3389 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
3390 struct os_reltime *rx_time, int level, const u8 *ies,
3391 size_t ies_len)
3392 {
3393 if (os_reltime_before(rx_time, &p2p->find_start)) {
3394 /*
3395 * The driver may have cached (e.g., in cfg80211 BSS table) the
3396 * scan results for relatively long time. To avoid reporting
3397 * stale information, update P2P peers only based on results
3398 * that have based on frames received after the last p2p_find
3399 * operation was started.
3400 */
3401 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
3402 " (rx_time=%u.%06u)",
3403 MAC2STR(bssid), (unsigned int) rx_time->sec,
3404 (unsigned int) rx_time->usec);
3405 return 0;
3406 }
3407
3408 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
3409
3410 return 0;
3411 }
3412
3413
3414 void p2p_scan_res_handled(struct p2p_data *p2p)
3415 {
3416 if (!p2p->p2p_scan_running) {
3417 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
3418 }
3419 p2p->p2p_scan_running = 0;
3420 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3421
3422 if (p2p_run_after_scan(p2p))
3423 return;
3424 if (p2p->state == P2P_SEARCH)
3425 p2p_continue_find(p2p);
3426 }
3427
3428
3429 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
3430 {
3431 u8 dev_capab;
3432 u8 *len;
3433
3434 #ifdef CONFIG_WIFI_DISPLAY
3435 if (p2p->wfd_ie_probe_req)
3436 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3437 #endif /* CONFIG_WIFI_DISPLAY */
3438
3439 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3440 wpabuf_put_buf(ies,
3441 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3442
3443 len = p2p_buf_add_ie_hdr(ies);
3444
3445 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3446
3447 /* P2PS requires Probe Request frames to include SD bit */
3448 if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3449 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
3450
3451 p2p_buf_add_capability(ies, dev_capab, 0);
3452
3453 if (dev_id)
3454 p2p_buf_add_device_id(ies, dev_id);
3455 if (p2p->cfg->reg_class && p2p->cfg->channel)
3456 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3457 p2p->cfg->reg_class,
3458 p2p->cfg->channel);
3459 if (p2p->ext_listen_interval)
3460 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3461 p2p->ext_listen_interval);
3462
3463 if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3464 p2p_buf_add_service_hash(ies, p2p);
3465
3466 /* TODO: p2p_buf_add_operating_channel() if GO */
3467 p2p_buf_update_ie_hdr(ies, len);
3468 }
3469
3470
3471 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3472 {
3473 size_t len = 100;
3474
3475 #ifdef CONFIG_WIFI_DISPLAY
3476 if (p2p && p2p->wfd_ie_probe_req)
3477 len += wpabuf_len(p2p->wfd_ie_probe_req);
3478 #endif /* CONFIG_WIFI_DISPLAY */
3479
3480 if (p2p && p2p->vendor_elem &&
3481 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3482 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3483
3484 return len;
3485 }
3486
3487
3488 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3489 {
3490 return p2p_attr_text(p2p_ie, buf, end);
3491 }
3492
3493
3494 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3495 {
3496 struct p2p_device *dev = p2p->go_neg_peer;
3497 int timeout;
3498
3499 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3500
3501 if (dev == NULL) {
3502 p2p_dbg(p2p, "No pending GO Negotiation");
3503 return;
3504 }
3505
3506 if (success) {
3507 if (dev->flags & P2P_DEV_USER_REJECTED) {
3508 p2p_set_state(p2p, P2P_IDLE);
3509 return;
3510 }
3511 } else if (dev->go_neg_req_sent) {
3512 /* Cancel the increment from p2p_connect_send() on failure */
3513 dev->go_neg_req_sent--;
3514 }
3515
3516 if (!success &&
3517 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3518 !is_zero_ether_addr(dev->member_in_go_dev)) {
3519 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3520 MAC2STR(dev->info.p2p_device_addr));
3521 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3522 p2p_send_dev_disc_req(p2p, dev);
3523 return;
3524 }
3525
3526 /*
3527 * Use P2P find, if needed, to find the other device from its listen
3528 * channel.
3529 */
3530 p2p_set_state(p2p, P2P_CONNECT);
3531 timeout = success ? 500000 : 100000;
3532 if (!success && p2p->go_neg_peer &&
3533 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3534 unsigned int r;
3535 /*
3536 * Peer is expected to wait our response and we will skip the
3537 * listen phase. Add some randomness to the wait time here to
3538 * make it less likely to hit cases where we could end up in
3539 * sync with peer not listening.
3540 */
3541 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3542 r = 0;
3543 timeout += r % 100000;
3544 }
3545 p2p_set_timeout(p2p, 0, timeout);
3546 }
3547
3548
3549 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3550 {
3551 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3552 success);
3553 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3554 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3555 return;
3556 }
3557 p2p_set_state(p2p, P2P_CONNECT);
3558 p2p_set_timeout(p2p, 0, 500000);
3559 }
3560
3561
3562 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3563 const u8 *addr)
3564 {
3565 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3566 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3567 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3568 return;
3569 }
3570
3571 if (success) {
3572 struct p2p_device *dev;
3573 dev = p2p_get_device(p2p, addr);
3574 if (dev &&
3575 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3576 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3577 }
3578
3579 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
3580 p2p_continue_find(p2p);
3581 }
3582
3583
3584 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3585 enum p2p_send_action_result result)
3586 {
3587 struct p2p_device *dev;
3588
3589 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3590 if (result == P2P_SEND_ACTION_FAILED) {
3591 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3592 p2p_go_neg_failed(p2p, -1);
3593 return;
3594 }
3595
3596 dev = p2p->go_neg_peer;
3597
3598 if (result == P2P_SEND_ACTION_NO_ACK) {
3599 /*
3600 * Retry GO Negotiation Confirmation
3601 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3602 * ACK for confirmation.
3603 */
3604 if (dev && dev->go_neg_conf &&
3605 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3606 p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3607 dev->go_neg_conf_sent);
3608 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3609 if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3610 dev->info.p2p_device_addr,
3611 p2p->cfg->dev_addr,
3612 dev->info.p2p_device_addr,
3613 wpabuf_head(dev->go_neg_conf),
3614 wpabuf_len(dev->go_neg_conf), 0) >=
3615 0) {
3616 dev->go_neg_conf_sent++;
3617 return;
3618 }
3619 p2p_dbg(p2p, "Failed to re-send Action frame");
3620
3621 /*
3622 * Continue with the assumption that the first attempt
3623 * went through and just the ACK frame was lost.
3624 */
3625 }
3626
3627 /*
3628 * It looks like the TX status for GO Negotiation Confirm is
3629 * often showing failure even when the peer has actually
3630 * received the frame. Since the peer may change channels
3631 * immediately after having received the frame, we may not see
3632 * an Ack for retries, so just dropping a single frame may
3633 * trigger this. To allow the group formation to succeed if the
3634 * peer did indeed receive the frame, continue regardless of
3635 * the TX status.
3636 */
3637 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3638 }
3639
3640 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3641
3642 if (dev == NULL)
3643 return;
3644
3645 p2p_go_complete(p2p, dev);
3646 }
3647
3648
3649 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3650 const u8 *src, const u8 *bssid,
3651 enum p2p_send_action_result result)
3652 {
3653 enum p2p_pending_action_state state;
3654 int success;
3655
3656 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3657 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
3658 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3659 MAC2STR(bssid), result, p2p_state_txt(p2p->state));
3660 success = result == P2P_SEND_ACTION_SUCCESS;
3661 state = p2p->pending_action_state;
3662 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3663 switch (state) {
3664 case P2P_NO_PENDING_ACTION:
3665 if (p2p->send_action_in_progress) {
3666 p2p->send_action_in_progress = 0;
3667 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3668 }
3669 p2p_check_after_scan_tx_continuation(p2p);
3670 break;
3671 case P2P_PENDING_GO_NEG_REQUEST:
3672 p2p_go_neg_req_cb(p2p, success);
3673 break;
3674 case P2P_PENDING_GO_NEG_RESPONSE:
3675 p2p_go_neg_resp_cb(p2p, success);
3676 break;
3677 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3678 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3679 break;
3680 case P2P_PENDING_GO_NEG_CONFIRM:
3681 p2p_go_neg_conf_cb(p2p, result);
3682 break;
3683 case P2P_PENDING_SD:
3684 p2p_sd_cb(p2p, success);
3685 break;
3686 case P2P_PENDING_PD:
3687 p2p_prov_disc_cb(p2p, success);
3688 break;
3689 case P2P_PENDING_PD_RESPONSE:
3690 p2p_prov_disc_resp_cb(p2p, success);
3691 break;
3692 case P2P_PENDING_INVITATION_REQUEST:
3693 p2p_invitation_req_cb(p2p, success);
3694 break;
3695 case P2P_PENDING_INVITATION_RESPONSE:
3696 p2p_invitation_resp_cb(p2p, success);
3697 break;
3698 case P2P_PENDING_DEV_DISC_REQUEST:
3699 p2p_dev_disc_req_cb(p2p, success);
3700 break;
3701 case P2P_PENDING_DEV_DISC_RESPONSE:
3702 p2p_dev_disc_resp_cb(p2p, success);
3703 break;
3704 case P2P_PENDING_GO_DISC_REQ:
3705 p2p_go_disc_req_cb(p2p, success);
3706 break;
3707 }
3708
3709 p2p->after_scan_tx_in_progress = 0;
3710 }
3711
3712
3713 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3714 unsigned int duration)
3715 {
3716 if (freq == p2p->pending_client_disc_freq) {
3717 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3718 p2p->pending_client_disc_freq = 0;
3719 return;
3720 }
3721
3722 if (freq != p2p->pending_listen_freq) {
3723 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3724 freq, duration, p2p->pending_listen_freq);
3725 return;
3726 }
3727
3728 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3729 p2p->pending_listen_sec, p2p->pending_listen_usec,
3730 p2p->pending_listen_freq);
3731 p2p->in_listen = 1;
3732 p2p->drv_in_listen = freq;
3733 if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3734 /*
3735 * Add 20 msec extra wait to avoid race condition with driver
3736 * remain-on-channel end event, i.e., give driver more time to
3737 * complete the operation before our timeout expires.
3738 */
3739 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3740 p2p->pending_listen_usec + 20000);
3741 }
3742
3743 p2p->pending_listen_freq = 0;
3744 }
3745
3746
3747 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3748 {
3749 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3750 p2p->drv_in_listen = 0;
3751 if (p2p->in_listen)
3752 return 0; /* Internal timeout will trigger the next step */
3753
3754 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3755 if (p2p->go_neg_peer->connect_reqs >= 120) {
3756 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3757 p2p_go_neg_failed(p2p, -1);
3758 return 0;
3759 }
3760
3761 p2p_set_state(p2p, P2P_CONNECT);
3762 p2p_connect_send(p2p, p2p->go_neg_peer);
3763 return 1;
3764 } else if (p2p->state == P2P_SEARCH) {
3765 if (p2p->p2p_scan_running) {
3766 /*
3767 * Search is already in progress. This can happen if
3768 * an Action frame RX is reported immediately after
3769 * the end of a remain-on-channel operation and the
3770 * response frame to that is sent using an offchannel
3771 * operation while in p2p_find. Avoid an attempt to
3772 * restart a scan here.
3773 */
3774 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3775 return 1;
3776 }
3777 if (p2p->pending_listen_freq) {
3778 /*
3779 * Better wait a bit if the driver is unable to start
3780 * offchannel operation for some reason. p2p_search()
3781 * will be started from internal timeout.
3782 */
3783 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3784 p2p_set_timeout(p2p, 0, 100000);
3785 return 1;
3786 }
3787 if (p2p->search_delay) {
3788 p2p_dbg(p2p, "Delay search operation by %u ms",
3789 p2p->search_delay);
3790 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3791 (p2p->search_delay % 1000) * 1000);
3792 return 1;
3793 }
3794 p2p_search(p2p);
3795 return 1;
3796 }
3797
3798 return 0;
3799 }
3800
3801
3802 static void p2p_timeout_connect(struct p2p_data *p2p)
3803 {
3804 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3805 if (p2p->go_neg_peer &&
3806 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3807 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3808 p2p_go_neg_failed(p2p, -1);
3809 return;
3810 }
3811 if (p2p->go_neg_peer &&
3812 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3813 p2p->go_neg_peer->connect_reqs < 120) {
3814 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3815 p2p_connect_send(p2p, p2p->go_neg_peer);
3816 return;
3817 }
3818 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3819 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3820 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3821 p2p_set_timeout(p2p, 0, 30000);
3822 return;
3823 }
3824 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3825 p2p_listen_in_find(p2p, 0);
3826 }
3827
3828
3829 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3830 {
3831 if (p2p->go_neg_peer) {
3832 if (p2p->drv_in_listen) {
3833 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3834 return;
3835 }
3836
3837 if (p2p->go_neg_peer->connect_reqs >= 120) {
3838 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3839 p2p_go_neg_failed(p2p, -1);
3840 return;
3841 }
3842
3843 p2p_set_state(p2p, P2P_CONNECT);
3844 p2p_connect_send(p2p, p2p->go_neg_peer);
3845 } else
3846 p2p_set_state(p2p, P2P_IDLE);
3847 }
3848
3849
3850 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3851 {
3852 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3853
3854 if (p2p->cfg->is_concurrent_session_active &&
3855 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3856 p2p_set_timeout(p2p, 0, 500000);
3857 else
3858 p2p_set_timeout(p2p, 0, 200000);
3859 }
3860
3861
3862 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3863 {
3864 struct p2p_device *dev = p2p->go_neg_peer;
3865
3866 if (dev == NULL) {
3867 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3868 return;
3869 }
3870
3871 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3872 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3873 p2p_listen_in_find(p2p, 0);
3874 }
3875
3876
3877 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3878 {
3879 p2p_dbg(p2p, "Service Discovery Query timeout");
3880 if (p2p->sd_peer) {
3881 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3882 p2p->sd_peer = NULL;
3883 }
3884 p2p_continue_find(p2p);
3885 }
3886
3887
3888 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3889 {
3890 p2p_dbg(p2p, "Provision Discovery Request timeout");
3891 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3892 p2p_continue_find(p2p);
3893 }
3894
3895
3896 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3897 {
3898 u32 adv_id = 0;
3899 u8 *adv_mac = NULL;
3900
3901 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3902
3903 /*
3904 * For user initiated PD requests that we have not gotten any responses
3905 * for while in IDLE state, we retry them a couple of times before
3906 * giving up.
3907 */
3908 if (!p2p->user_initiated_pd)
3909 return;
3910
3911 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3912
3913 if (p2p->pd_retries) {
3914 p2p->pd_retries--;
3915 p2p_retry_pd(p2p);
3916 } else {
3917 struct p2p_device *dev;
3918 int for_join = 0;
3919
3920 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3921 if (os_memcmp(p2p->pending_pd_devaddr,
3922 dev->info.p2p_device_addr, ETH_ALEN) != 0)
3923 continue;
3924 if (dev->req_config_methods &&
3925 (dev->flags & P2P_DEV_PD_FOR_JOIN))
3926 for_join = 1;
3927 }
3928
3929 if (p2p->p2ps_prov) {
3930 adv_id = p2p->p2ps_prov->adv_id;
3931 adv_mac = p2p->p2ps_prov->adv_mac;
3932 }
3933
3934 if (p2p->cfg->prov_disc_fail)
3935 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3936 p2p->pending_pd_devaddr,
3937 for_join ?
3938 P2P_PROV_DISC_TIMEOUT_JOIN :
3939 P2P_PROV_DISC_TIMEOUT,
3940 adv_id, adv_mac, NULL);
3941 p2p_reset_pending_pd(p2p);
3942 }
3943 }
3944
3945
3946 static void p2p_timeout_invite(struct p2p_data *p2p)
3947 {
3948 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3949 p2p_set_state(p2p, P2P_INVITE_LISTEN);
3950 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3951 /*
3952 * Better remain on operating channel instead of listen channel
3953 * when running a group.
3954 */
3955 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3956 p2p_set_timeout(p2p, 0, 100000);
3957 return;
3958 }
3959 p2p_listen_in_find(p2p, 0);
3960 }
3961
3962
3963 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3964 {
3965 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3966 p2p_set_state(p2p, P2P_INVITE);
3967 p2p_invite_send(p2p, p2p->invite_peer,
3968 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3969 } else {
3970 if (p2p->invite_peer) {
3971 p2p_dbg(p2p, "Invitation Request retry limit reached");
3972 if (p2p->cfg->invitation_result)
3973 p2p->cfg->invitation_result(
3974 p2p->cfg->cb_ctx, -1, NULL, NULL,
3975 p2p->invite_peer->info.p2p_device_addr,
3976 0, 0);
3977 }
3978 p2p_set_state(p2p, P2P_IDLE);
3979 }
3980 }
3981
3982
3983 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3984 {
3985 struct p2p_data *p2p = eloop_ctx;
3986
3987 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3988
3989 p2p->in_listen = 0;
3990 if (p2p->drv_in_listen) {
3991 p2p_dbg(p2p, "Driver is still in listen state - stop it");
3992 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
3993 }
3994
3995 switch (p2p->state) {
3996 case P2P_IDLE:
3997 /* Check if we timed out waiting for PD req */
3998 if (p2p->pending_action_state == P2P_PENDING_PD)
3999 p2p_timeout_prov_disc_req(p2p);
4000 break;
4001 case P2P_SEARCH:
4002 /* Check if we timed out waiting for PD req */
4003 if (p2p->pending_action_state == P2P_PENDING_PD)
4004 p2p_timeout_prov_disc_req(p2p);
4005 if (p2p->search_delay && !p2p->in_search_delay) {
4006 p2p_dbg(p2p, "Delay search operation by %u ms",
4007 p2p->search_delay);
4008 p2p->in_search_delay = 1;
4009 p2p_set_timeout(p2p, p2p->search_delay / 1000,
4010 (p2p->search_delay % 1000) * 1000);
4011 break;
4012 }
4013 p2p->in_search_delay = 0;
4014 p2p_search(p2p);
4015 break;
4016 case P2P_CONNECT:
4017 p2p_timeout_connect(p2p);
4018 break;
4019 case P2P_CONNECT_LISTEN:
4020 p2p_timeout_connect_listen(p2p);
4021 break;
4022 case P2P_GO_NEG:
4023 break;
4024 case P2P_LISTEN_ONLY:
4025 /* Check if we timed out waiting for PD req */
4026 if (p2p->pending_action_state == P2P_PENDING_PD)
4027 p2p_timeout_prov_disc_req(p2p);
4028
4029 if (p2p->ext_listen_only) {
4030 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
4031 p2p->ext_listen_only = 0;
4032 p2p_set_state(p2p, P2P_IDLE);
4033 }
4034 break;
4035 case P2P_WAIT_PEER_CONNECT:
4036 p2p_timeout_wait_peer_connect(p2p);
4037 break;
4038 case P2P_WAIT_PEER_IDLE:
4039 p2p_timeout_wait_peer_idle(p2p);
4040 break;
4041 case P2P_SD_DURING_FIND:
4042 p2p_timeout_sd_during_find(p2p);
4043 break;
4044 case P2P_PROVISIONING:
4045 break;
4046 case P2P_PD_DURING_FIND:
4047 p2p_timeout_prov_disc_during_find(p2p);
4048 break;
4049 case P2P_INVITE:
4050 p2p_timeout_invite(p2p);
4051 break;
4052 case P2P_INVITE_LISTEN:
4053 p2p_timeout_invite_listen(p2p);
4054 break;
4055 }
4056 }
4057
4058
4059 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
4060 {
4061 struct p2p_device *dev;
4062
4063 dev = p2p_get_device(p2p, peer_addr);
4064 p2p_dbg(p2p, "Local request to reject connection attempts by peer "
4065 MACSTR, MAC2STR(peer_addr));
4066 if (dev == NULL) {
4067 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
4068 return -1;
4069 }
4070 dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
4071 dev->flags |= P2P_DEV_USER_REJECTED;
4072 return 0;
4073 }
4074
4075
4076 const char * p2p_wps_method_text(enum p2p_wps_method method)
4077 {
4078 switch (method) {
4079 case WPS_NOT_READY:
4080 return "not-ready";
4081 case WPS_PIN_DISPLAY:
4082 return "Display";
4083 case WPS_PIN_KEYPAD:
4084 return "Keypad";
4085 case WPS_PBC:
4086 return "PBC";
4087 case WPS_NFC:
4088 return "NFC";
4089 case WPS_P2PS:
4090 return "P2PS";
4091 }
4092
4093 return "??";
4094 }
4095
4096
4097 static const char * p2p_go_state_text(enum p2p_go_state go_state)
4098 {
4099 switch (go_state) {
4100 case UNKNOWN_GO:
4101 return "unknown";
4102 case LOCAL_GO:
4103 return "local";
4104 case REMOTE_GO:
4105 return "remote";
4106 }
4107
4108 return "??";
4109 }
4110
4111
4112 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
4113 const u8 *addr, int next)
4114 {
4115 struct p2p_device *dev;
4116
4117 if (addr)
4118 dev = p2p_get_device(p2p, addr);
4119 else
4120 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4121
4122 if (dev && next) {
4123 dev = dl_list_first(&dev->list, struct p2p_device, list);
4124 if (&dev->list == &p2p->devices)
4125 dev = NULL;
4126 }
4127
4128 if (dev == NULL)
4129 return NULL;
4130
4131 return &dev->info;
4132 }
4133
4134
4135 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
4136 char *buf, size_t buflen)
4137 {
4138 struct p2p_device *dev;
4139 int res;
4140 char *pos, *end;
4141 struct os_reltime now;
4142
4143 if (info == NULL)
4144 return -1;
4145
4146 dev = (struct p2p_device *) (((u8 *) info) -
4147 offsetof(struct p2p_device, info));
4148
4149 pos = buf;
4150 end = buf + buflen;
4151
4152 os_get_reltime(&now);
4153 res = os_snprintf(pos, end - pos,
4154 "age=%d\n"
4155 "listen_freq=%d\n"
4156 "wps_method=%s\n"
4157 "interface_addr=" MACSTR "\n"
4158 "member_in_go_dev=" MACSTR "\n"
4159 "member_in_go_iface=" MACSTR "\n"
4160 "go_neg_req_sent=%d\n"
4161 "go_state=%s\n"
4162 "dialog_token=%u\n"
4163 "intended_addr=" MACSTR "\n"
4164 "country=%c%c\n"
4165 "oper_freq=%d\n"
4166 "req_config_methods=0x%x\n"
4167 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
4168 "status=%d\n"
4169 "invitation_reqs=%u\n",
4170 (int) (now.sec - dev->last_seen.sec),
4171 dev->listen_freq,
4172 p2p_wps_method_text(dev->wps_method),
4173 MAC2STR(dev->interface_addr),
4174 MAC2STR(dev->member_in_go_dev),
4175 MAC2STR(dev->member_in_go_iface),
4176 dev->go_neg_req_sent,
4177 p2p_go_state_text(dev->go_state),
4178 dev->dialog_token,
4179 MAC2STR(dev->intended_addr),
4180 dev->country[0] ? dev->country[0] : '_',
4181 dev->country[1] ? dev->country[1] : '_',
4182 dev->oper_freq,
4183 dev->req_config_methods,
4184 dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
4185 "[PROBE_REQ_ONLY]" : "",
4186 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
4187 dev->flags & P2P_DEV_NOT_YET_READY ?
4188 "[NOT_YET_READY]" : "",
4189 dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
4190 "[PD_PEER_DISPLAY]" : "",
4191 dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
4192 "[PD_PEER_KEYPAD]" : "",
4193 dev->flags & P2P_DEV_PD_PEER_P2PS ?
4194 "[PD_PEER_P2PS]" : "",
4195 dev->flags & P2P_DEV_USER_REJECTED ?
4196 "[USER_REJECTED]" : "",
4197 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
4198 "[PEER_WAITING_RESPONSE]" : "",
4199 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
4200 "[PREFER_PERSISTENT_GROUP]" : "",
4201 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
4202 "[WAIT_GO_NEG_RESPONSE]" : "",
4203 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
4204 "[WAIT_GO_NEG_CONFIRM]" : "",
4205 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
4206 "[GROUP_CLIENT_ONLY]" : "",
4207 dev->flags & P2P_DEV_FORCE_FREQ ?
4208 "[FORCE_FREQ]" : "",
4209 dev->flags & P2P_DEV_PD_FOR_JOIN ?
4210 "[PD_FOR_JOIN]" : "",
4211 dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT ?
4212 "[LAST_SEEN_AS_GROUP_CLIENT]" : "",
4213 dev->status,
4214 dev->invitation_reqs);
4215 if (os_snprintf_error(end - pos, res))
4216 return pos - buf;
4217 pos += res;
4218
4219 if (dev->ext_listen_period) {
4220 res = os_snprintf(pos, end - pos,
4221 "ext_listen_period=%u\n"
4222 "ext_listen_interval=%u\n",
4223 dev->ext_listen_period,
4224 dev->ext_listen_interval);
4225 if (os_snprintf_error(end - pos, res))
4226 return pos - buf;
4227 pos += res;
4228 }
4229
4230 if (dev->oper_ssid_len) {
4231 res = os_snprintf(pos, end - pos,
4232 "oper_ssid=%s\n",
4233 wpa_ssid_txt(dev->oper_ssid,
4234 dev->oper_ssid_len));
4235 if (os_snprintf_error(end - pos, res))
4236 return pos - buf;
4237 pos += res;
4238 }
4239
4240 #ifdef CONFIG_WIFI_DISPLAY
4241 if (dev->info.wfd_subelems) {
4242 res = os_snprintf(pos, end - pos, "wfd_subelems=");
4243 if (os_snprintf_error(end - pos, res))
4244 return pos - buf;
4245 pos += res;
4246
4247 pos += wpa_snprintf_hex(pos, end - pos,
4248 wpabuf_head(dev->info.wfd_subelems),
4249 wpabuf_len(dev->info.wfd_subelems));
4250
4251 res = os_snprintf(pos, end - pos, "\n");
4252 if (os_snprintf_error(end - pos, res))
4253 return pos - buf;
4254 pos += res;
4255 }
4256 #endif /* CONFIG_WIFI_DISPLAY */
4257
4258 return pos - buf;
4259 }
4260
4261
4262 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
4263 {
4264 return p2p_get_device(p2p, addr) != NULL;
4265 }
4266
4267
4268 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
4269 {
4270 if (enabled) {
4271 p2p_dbg(p2p, "Client discoverability enabled");
4272 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4273 } else {
4274 p2p_dbg(p2p, "Client discoverability disabled");
4275 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4276 }
4277 }
4278
4279
4280 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
4281 u32 duration2, u32 interval2)
4282 {
4283 struct wpabuf *req;
4284 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
4285 u8 *len;
4286
4287 req = wpabuf_alloc(100);
4288 if (req == NULL)
4289 return NULL;
4290
4291 if (duration1 || interval1) {
4292 os_memset(&desc1, 0, sizeof(desc1));
4293 desc1.count_type = 1;
4294 desc1.duration = duration1;
4295 desc1.interval = interval1;
4296 ptr1 = &desc1;
4297
4298 if (duration2 || interval2) {
4299 os_memset(&desc2, 0, sizeof(desc2));
4300 desc2.count_type = 2;
4301 desc2.duration = duration2;
4302 desc2.interval = interval2;
4303 ptr2 = &desc2;
4304 }
4305 }
4306
4307 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
4308 len = p2p_buf_add_ie_hdr(req);
4309 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
4310 p2p_buf_update_ie_hdr(req, len);
4311
4312 return req;
4313 }
4314
4315
4316 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
4317 const u8 *own_interface_addr, unsigned int freq,
4318 u32 duration1, u32 interval1, u32 duration2,
4319 u32 interval2)
4320 {
4321 struct wpabuf *req;
4322
4323 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
4324 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
4325 "dur2=%u int2=%u",
4326 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
4327 freq, duration1, interval1, duration2, interval2);
4328
4329 req = p2p_build_presence_req(duration1, interval1, duration2,
4330 interval2);
4331 if (req == NULL)
4332 return -1;
4333
4334 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4335 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
4336 go_interface_addr,
4337 wpabuf_head(req), wpabuf_len(req), 200) < 0) {
4338 p2p_dbg(p2p, "Failed to send Action frame");
4339 }
4340 wpabuf_free(req);
4341
4342 return 0;
4343 }
4344
4345
4346 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
4347 size_t noa_len, u8 dialog_token)
4348 {
4349 struct wpabuf *resp;
4350 u8 *len;
4351
4352 resp = wpabuf_alloc(100 + noa_len);
4353 if (resp == NULL)
4354 return NULL;
4355
4356 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
4357 len = p2p_buf_add_ie_hdr(resp);
4358 p2p_buf_add_status(resp, status);
4359 if (noa) {
4360 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
4361 wpabuf_put_le16(resp, noa_len);
4362 wpabuf_put_data(resp, noa, noa_len);
4363 } else
4364 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
4365 p2p_buf_update_ie_hdr(resp, len);
4366
4367 return resp;
4368 }
4369
4370
4371 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
4372 const u8 *sa, const u8 *data, size_t len,
4373 int rx_freq)
4374 {
4375 struct p2p_message msg;
4376 u8 status;
4377 struct wpabuf *resp;
4378 size_t g;
4379 struct p2p_group *group = NULL;
4380 int parsed = 0;
4381 u8 noa[50];
4382 int noa_len;
4383
4384 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
4385
4386 for (g = 0; g < p2p->num_groups; g++) {
4387 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
4388 ETH_ALEN) == 0) {
4389 group = p2p->groups[g];
4390 break;
4391 }
4392 }
4393 if (group == NULL) {
4394 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
4395 MACSTR, MAC2STR(da));
4396 return;
4397 }
4398
4399 if (p2p_parse(data, len, &msg) < 0) {
4400 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
4401 status = P2P_SC_FAIL_INVALID_PARAMS;
4402 goto fail;
4403 }
4404 parsed = 1;
4405
4406 if (msg.noa == NULL) {
4407 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
4408 status = P2P_SC_FAIL_INVALID_PARAMS;
4409 goto fail;
4410 }
4411
4412 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
4413
4414 fail:
4415 if (p2p->cfg->get_noa)
4416 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
4417 sizeof(noa));
4418 else
4419 noa_len = -1;
4420 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
4421 noa_len > 0 ? noa_len : 0,
4422 msg.dialog_token);
4423 if (parsed)
4424 p2p_parse_free(&msg);
4425 if (resp == NULL)
4426 return;
4427
4428 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4429 if (p2p_send_action(p2p, rx_freq, sa, da, da,
4430 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
4431 p2p_dbg(p2p, "Failed to send Action frame");
4432 }
4433 wpabuf_free(resp);
4434 }
4435
4436
4437 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
4438 const u8 *sa, const u8 *data, size_t len)
4439 {
4440 struct p2p_message msg;
4441
4442 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
4443
4444 if (p2p_parse(data, len, &msg) < 0) {
4445 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
4446 return;
4447 }
4448
4449 if (msg.status == NULL || msg.noa == NULL) {
4450 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
4451 p2p_parse_free(&msg);
4452 return;
4453 }
4454
4455 if (p2p->cfg->presence_resp) {
4456 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4457 msg.noa, msg.noa_len);
4458 }
4459
4460 if (*msg.status) {
4461 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4462 *msg.status);
4463 p2p_parse_free(&msg);
4464 return;
4465 }
4466
4467 p2p_dbg(p2p, "P2P Presence Request was accepted");
4468 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4469 msg.noa, msg.noa_len);
4470 /* TODO: process NoA */
4471 p2p_parse_free(&msg);
4472 }
4473
4474
4475 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4476 {
4477 struct p2p_data *p2p = eloop_ctx;
4478
4479 if (p2p->ext_listen_interval) {
4480 /* Schedule next extended listen timeout */
4481 eloop_register_timeout(p2p->ext_listen_interval_sec,
4482 p2p->ext_listen_interval_usec,
4483 p2p_ext_listen_timeout, p2p, NULL);
4484 }
4485
4486 if ((p2p->cfg->is_p2p_in_progress &&
4487 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4488 (p2p->pending_action_state == P2P_PENDING_PD &&
4489 p2p->pd_retries > 0)) {
4490 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4491 p2p_state_txt(p2p->state));
4492 return;
4493 }
4494
4495 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4496 /*
4497 * This should not really happen, but it looks like the Listen
4498 * command may fail is something else (e.g., a scan) was
4499 * running at an inconvenient time. As a workaround, allow new
4500 * Extended Listen operation to be started.
4501 */
4502 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4503 p2p->ext_listen_only = 0;
4504 p2p_set_state(p2p, P2P_IDLE);
4505 }
4506
4507 if (p2p->state != P2P_IDLE) {
4508 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4509 return;
4510 }
4511
4512 p2p_dbg(p2p, "Extended Listen timeout");
4513 p2p->ext_listen_only = 1;
4514 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4515 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4516 p2p->ext_listen_only = 0;
4517 }
4518 }
4519
4520
4521 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4522 unsigned int interval)
4523 {
4524 if (period > 65535 || interval > 65535 || period > interval ||
4525 (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4526 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4527 period, interval);
4528 return -1;
4529 }
4530
4531 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4532
4533 if (interval == 0) {
4534 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4535 p2p->ext_listen_period = 0;
4536 p2p->ext_listen_interval = 0;
4537 return 0;
4538 }
4539
4540 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4541 period, interval);
4542 p2p->ext_listen_period = period;
4543 p2p->ext_listen_interval = interval;
4544 p2p->ext_listen_interval_sec = interval / 1000;
4545 p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4546
4547 eloop_register_timeout(p2p->ext_listen_interval_sec,
4548 p2p->ext_listen_interval_usec,
4549 p2p_ext_listen_timeout, p2p, NULL);
4550
4551 return 0;
4552 }
4553
4554
4555 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4556 const u8 *ie, size_t ie_len)
4557 {
4558 struct p2p_message msg;
4559
4560 if (bssid == NULL || ie == NULL)
4561 return;
4562
4563 os_memset(&msg, 0, sizeof(msg));
4564 if (p2p_parse_ies(ie, ie_len, &msg))
4565 return;
4566 if (msg.minor_reason_code == NULL) {
4567 p2p_parse_free(&msg);
4568 return;
4569 }
4570
4571 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4572 " reason_code=%u minor_reason_code=%u",
4573 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4574
4575 p2p_parse_free(&msg);
4576 }
4577
4578
4579 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4580 const u8 *ie, size_t ie_len)
4581 {
4582 struct p2p_message msg;
4583
4584 if (bssid == NULL || ie == NULL)
4585 return;
4586
4587 os_memset(&msg, 0, sizeof(msg));
4588 if (p2p_parse_ies(ie, ie_len, &msg))
4589 return;
4590 if (msg.minor_reason_code == NULL) {
4591 p2p_parse_free(&msg);
4592 return;
4593 }
4594
4595 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4596 " reason_code=%u minor_reason_code=%u",
4597 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4598
4599 p2p_parse_free(&msg);
4600 }
4601
4602
4603 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4604 {
4605 if (enabled) {
4606 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4607 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4608 } else {
4609 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4610 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4611 }
4612 }
4613
4614
4615 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4616 u8 *op_channel)
4617 {
4618 return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4619 }
4620
4621
4622 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4623 u8 forced)
4624 {
4625 if (p2p_channel_to_freq(reg_class, channel) < 0)
4626 return -1;
4627
4628 /*
4629 * Listen channel was set in configuration or set by control interface;
4630 * cannot override it.
4631 */
4632 if (p2p->cfg->channel_forced && forced == 0) {
4633 p2p_dbg(p2p,
4634 "Listen channel was previously configured - do not override based on optimization");
4635 return -1;
4636 }
4637
4638 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4639 reg_class, channel);
4640
4641 if (p2p->state == P2P_IDLE) {
4642 p2p->cfg->reg_class = reg_class;
4643 p2p->cfg->channel = channel;
4644 p2p->cfg->channel_forced = forced;
4645 } else {
4646 p2p_dbg(p2p, "Defer setting listen channel");
4647 p2p->pending_reg_class = reg_class;
4648 p2p->pending_channel = channel;
4649 p2p->pending_channel_forced = forced;
4650 }
4651
4652 return 0;
4653 }
4654
4655
4656 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4657 {
4658 return p2p->cfg->channel;
4659 }
4660
4661
4662 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4663 {
4664 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4665 if (postfix == NULL) {
4666 p2p->cfg->ssid_postfix_len = 0;
4667 return 0;
4668 }
4669 if (len > sizeof(p2p->cfg->ssid_postfix))
4670 return -1;
4671 os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4672 p2p->cfg->ssid_postfix_len = len;
4673 return 0;
4674 }
4675
4676
4677 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4678 int cfg_op_channel)
4679 {
4680 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4681 return -1;
4682
4683 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4684 op_reg_class, op_channel);
4685 p2p->cfg->op_reg_class = op_reg_class;
4686 p2p->cfg->op_channel = op_channel;
4687 p2p->cfg->cfg_op_channel = cfg_op_channel;
4688 return 0;
4689 }
4690
4691
4692 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4693 const struct p2p_channel *pref_chan)
4694 {
4695 struct p2p_channel *n;
4696
4697 if (pref_chan) {
4698 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4699 if (n == NULL)
4700 return -1;
4701 os_memcpy(n, pref_chan,
4702 num_pref_chan * sizeof(struct p2p_channel));
4703 } else
4704 n = NULL;
4705
4706 os_free(p2p->cfg->pref_chan);
4707 p2p->cfg->pref_chan = n;
4708 p2p->cfg->num_pref_chan = num_pref_chan;
4709
4710 return 0;
4711 }
4712
4713
4714 int p2p_set_no_go_freq(struct p2p_data *p2p,
4715 const struct wpa_freq_range_list *list)
4716 {
4717 struct wpa_freq_range *tmp;
4718
4719 if (list == NULL || list->num == 0) {
4720 os_free(p2p->no_go_freq.range);
4721 p2p->no_go_freq.range = NULL;
4722 p2p->no_go_freq.num = 0;
4723 return 0;
4724 }
4725
4726 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4727 if (tmp == NULL)
4728 return -1;
4729 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4730 os_free(p2p->no_go_freq.range);
4731 p2p->no_go_freq.range = tmp;
4732 p2p->no_go_freq.num = list->num;
4733 p2p_dbg(p2p, "Updated no GO chan list");
4734
4735 return 0;
4736 }
4737
4738
4739 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4740 u8 *iface_addr)
4741 {
4742 struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4743 if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4744 return -1;
4745 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4746 return 0;
4747 }
4748
4749
4750 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4751 u8 *dev_addr)
4752 {
4753 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4754 if (dev == NULL)
4755 return -1;
4756 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4757 return 0;
4758 }
4759
4760
4761 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4762 {
4763 os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4764 if (is_zero_ether_addr(p2p->peer_filter))
4765 p2p_dbg(p2p, "Disable peer filter");
4766 else
4767 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4768 MAC2STR(p2p->peer_filter));
4769 }
4770
4771
4772 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4773 {
4774 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4775 if (p2p->cross_connect == enabled)
4776 return;
4777 p2p->cross_connect = enabled;
4778 /* TODO: may need to tear down any action group where we are GO(?) */
4779 }
4780
4781
4782 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4783 {
4784 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4785 if (dev == NULL)
4786 return -1;
4787 if (dev->oper_freq <= 0)
4788 return -1;
4789 return dev->oper_freq;
4790 }
4791
4792
4793 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4794 {
4795 p2p_dbg(p2p, "Intra BSS distribution %s",
4796 enabled ? "enabled" : "disabled");
4797 p2p->cfg->p2p_intra_bss = enabled;
4798 }
4799
4800
4801 void p2p_update_channel_list(struct p2p_data *p2p,
4802 const struct p2p_channels *chan,
4803 const struct p2p_channels *cli_chan)
4804 {
4805 p2p_dbg(p2p, "Update channel list");
4806 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4807 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4808 os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4809 sizeof(struct p2p_channels));
4810 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4811 }
4812
4813
4814 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4815 const u8 *src, const u8 *bssid, const u8 *buf,
4816 size_t len, unsigned int wait_time)
4817 {
4818 if (p2p->p2p_scan_running) {
4819 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4820 if (p2p->after_scan_tx) {
4821 p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4822 os_free(p2p->after_scan_tx);
4823 }
4824 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4825 len);
4826 if (p2p->after_scan_tx == NULL)
4827 return -1;
4828 p2p->after_scan_tx->freq = freq;
4829 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4830 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4831 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4832 p2p->after_scan_tx->len = len;
4833 p2p->after_scan_tx->wait_time = wait_time;
4834 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4835 return 0;
4836 }
4837
4838 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4839 buf, len, wait_time);
4840 }
4841
4842
4843 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4844 int freq_overall)
4845 {
4846 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d",
4847 freq_24, freq_5, freq_overall);
4848 p2p->best_freq_24 = freq_24;
4849 p2p->best_freq_5 = freq_5;
4850 p2p->best_freq_overall = freq_overall;
4851 }
4852
4853
4854 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4855 {
4856 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4857 p2p->own_freq_preference = freq;
4858 }
4859
4860
4861 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4862 {
4863 if (p2p == NULL || p2p->go_neg_peer == NULL)
4864 return NULL;
4865 return p2p->go_neg_peer->info.p2p_device_addr;
4866 }
4867
4868
4869 const struct p2p_peer_info *
4870 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4871 {
4872 struct p2p_device *dev;
4873
4874 if (addr) {
4875 dev = p2p_get_device(p2p, addr);
4876 if (!dev)
4877 return NULL;
4878
4879 if (!next) {
4880 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4881 return NULL;
4882
4883 return &dev->info;
4884 } else {
4885 do {
4886 dev = dl_list_first(&dev->list,
4887 struct p2p_device,
4888 list);
4889 if (!dev || &dev->list == &p2p->devices)
4890 return NULL;
4891 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4892 }
4893 } else {
4894 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4895 if (!dev)
4896 return NULL;
4897 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4898 dev = dl_list_first(&dev->list,
4899 struct p2p_device,
4900 list);
4901 if (!dev || &dev->list == &p2p->devices)
4902 return NULL;
4903 }
4904 }
4905
4906 return &dev->info;
4907 }
4908
4909
4910 int p2p_in_progress(struct p2p_data *p2p)
4911 {
4912 if (p2p == NULL)
4913 return 0;
4914 if (p2p->state == P2P_SEARCH)
4915 return 2;
4916 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4917 }
4918
4919
4920 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4921 u8 client_timeout)
4922 {
4923 if (p2p) {
4924 p2p->go_timeout = go_timeout;
4925 p2p->client_timeout = client_timeout;
4926 }
4927 }
4928
4929
4930 #ifdef CONFIG_WIFI_DISPLAY
4931
4932 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4933 {
4934 size_t g;
4935 struct p2p_group *group;
4936
4937 for (g = 0; g < p2p->num_groups; g++) {
4938 group = p2p->groups[g];
4939 p2p_group_force_beacon_update_ies(group);
4940 }
4941 }
4942
4943
4944 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4945 {
4946 wpabuf_free(p2p->wfd_ie_beacon);
4947 p2p->wfd_ie_beacon = ie;
4948 p2p_update_wfd_ie_groups(p2p);
4949 return 0;
4950 }
4951
4952
4953 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4954 {
4955 wpabuf_free(p2p->wfd_ie_probe_req);
4956 p2p->wfd_ie_probe_req = ie;
4957 return 0;
4958 }
4959
4960
4961 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4962 {
4963 wpabuf_free(p2p->wfd_ie_probe_resp);
4964 p2p->wfd_ie_probe_resp = ie;
4965 p2p_update_wfd_ie_groups(p2p);
4966 return 0;
4967 }
4968
4969
4970 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4971 {
4972 wpabuf_free(p2p->wfd_ie_assoc_req);
4973 p2p->wfd_ie_assoc_req = ie;
4974 return 0;
4975 }
4976
4977
4978 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4979 {
4980 wpabuf_free(p2p->wfd_ie_invitation);
4981 p2p->wfd_ie_invitation = ie;
4982 return 0;
4983 }
4984
4985
4986 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4987 {
4988 wpabuf_free(p2p->wfd_ie_prov_disc_req);
4989 p2p->wfd_ie_prov_disc_req = ie;
4990 return 0;
4991 }
4992
4993
4994 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4995 {
4996 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4997 p2p->wfd_ie_prov_disc_resp = ie;
4998 return 0;
4999 }
5000
5001
5002 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
5003 {
5004 wpabuf_free(p2p->wfd_ie_go_neg);
5005 p2p->wfd_ie_go_neg = ie;
5006 return 0;
5007 }
5008
5009
5010 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
5011 {
5012 wpabuf_free(p2p->wfd_dev_info);
5013 if (elem) {
5014 p2p->wfd_dev_info = wpabuf_dup(elem);
5015 if (p2p->wfd_dev_info == NULL)
5016 return -1;
5017 } else
5018 p2p->wfd_dev_info = NULL;
5019
5020 return 0;
5021 }
5022
5023
5024 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
5025 {
5026 wpabuf_free(p2p->wfd_assoc_bssid);
5027 if (elem) {
5028 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
5029 if (p2p->wfd_assoc_bssid == NULL)
5030 return -1;
5031 } else
5032 p2p->wfd_assoc_bssid = NULL;
5033
5034 return 0;
5035 }
5036
5037
5038 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
5039 const struct wpabuf *elem)
5040 {
5041 wpabuf_free(p2p->wfd_coupled_sink_info);
5042 if (elem) {
5043 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
5044 if (p2p->wfd_coupled_sink_info == NULL)
5045 return -1;
5046 } else
5047 p2p->wfd_coupled_sink_info = NULL;
5048
5049 return 0;
5050 }
5051
5052 #endif /* CONFIG_WIFI_DISPLAY */
5053
5054
5055 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
5056 int max_disc_tu)
5057 {
5058 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
5059 return -1;
5060
5061 p2p->min_disc_int = min_disc_int;
5062 p2p->max_disc_int = max_disc_int;
5063 p2p->max_disc_tu = max_disc_tu;
5064 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
5065 min_disc_int, max_disc_int, max_disc_tu);
5066
5067 return 0;
5068 }
5069
5070
5071 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
5072 {
5073 va_list ap;
5074 char buf[500];
5075
5076 if (!p2p->cfg->debug_print)
5077 return;
5078
5079 va_start(ap, fmt);
5080 vsnprintf(buf, sizeof(buf), fmt, ap);
5081 buf[sizeof(buf) - 1] = '\0';
5082 va_end(ap);
5083 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
5084 }
5085
5086
5087 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
5088 {
5089 va_list ap;
5090 char buf[500];
5091
5092 if (!p2p->cfg->debug_print)
5093 return;
5094
5095 va_start(ap, fmt);
5096 vsnprintf(buf, sizeof(buf), fmt, ap);
5097 buf[sizeof(buf) - 1] = '\0';
5098 va_end(ap);
5099 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
5100 }
5101
5102
5103 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
5104 {
5105 va_list ap;
5106 char buf[500];
5107
5108 if (!p2p->cfg->debug_print)
5109 return;
5110
5111 va_start(ap, fmt);
5112 vsnprintf(buf, sizeof(buf), fmt, ap);
5113 buf[sizeof(buf) - 1] = '\0';
5114 va_end(ap);
5115 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
5116 }
5117
5118
5119 void p2p_loop_on_known_peers(struct p2p_data *p2p,
5120 void (*peer_callback)(struct p2p_peer_info *peer,
5121 void *user_data),
5122 void *user_data)
5123 {
5124 struct p2p_device *dev, *n;
5125
5126 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
5127 peer_callback(&dev->info, user_data);
5128 }
5129 }
5130
5131
5132 #ifdef CONFIG_WPS_NFC
5133
5134 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
5135 int client_freq,
5136 const u8 *go_dev_addr,
5137 const u8 *ssid, size_t ssid_len)
5138 {
5139 struct wpabuf *buf;
5140 u8 op_class, channel;
5141 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
5142
5143 buf = wpabuf_alloc(1000);
5144 if (buf == NULL)
5145 return NULL;
5146
5147 op_class = p2p->cfg->reg_class;
5148 channel = p2p->cfg->channel;
5149
5150 p2p_buf_add_capability(buf, p2p->dev_capab &
5151 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
5152 p2p_buf_add_device_info(buf, p2p, NULL);
5153
5154 if (p2p->num_groups > 0) {
5155 int freq = p2p_group_get_freq(p2p->groups[0]);
5156 role = P2P_GO_IN_A_GROUP;
5157 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
5158 p2p_dbg(p2p,
5159 "Unknown GO operating frequency %d MHz for NFC handover",
5160 freq);
5161 wpabuf_free(buf);
5162 return NULL;
5163 }
5164 } else if (client_freq > 0) {
5165 role = P2P_CLIENT_IN_A_GROUP;
5166 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
5167 p2p_dbg(p2p,
5168 "Unknown client operating frequency %d MHz for NFC handover",
5169 client_freq);
5170 wpabuf_free(buf);
5171 return NULL;
5172 }
5173 }
5174
5175 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
5176 channel, role);
5177
5178 if (p2p->num_groups > 0) {
5179 /* Limit number of clients to avoid very long message */
5180 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
5181 p2p_group_buf_add_id(p2p->groups[0], buf);
5182 } else if (client_freq > 0 &&
5183 go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
5184 ssid && ssid_len > 0) {
5185 /*
5186 * Add the optional P2P Group ID to indicate in which group this
5187 * device is a P2P Client.
5188 */
5189 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
5190 }
5191
5192 return buf;
5193 }
5194
5195
5196 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
5197 int client_freq,
5198 const u8 *go_dev_addr,
5199 const u8 *ssid, size_t ssid_len)
5200 {
5201 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5202 ssid_len);
5203 }
5204
5205
5206 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
5207 int client_freq,
5208 const u8 *go_dev_addr,
5209 const u8 *ssid, size_t ssid_len)
5210 {
5211 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5212 ssid_len);
5213 }
5214
5215
5216 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
5217 struct p2p_nfc_params *params)
5218 {
5219 struct p2p_message msg;
5220 struct p2p_device *dev;
5221 const u8 *p2p_dev_addr;
5222 int freq;
5223 enum p2p_role_indication role;
5224
5225 params->next_step = NO_ACTION;
5226
5227 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
5228 params->p2p_attr, params->p2p_len, &msg)) {
5229 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
5230 p2p_parse_free(&msg);
5231 return -1;
5232 }
5233
5234 if (msg.p2p_device_addr)
5235 p2p_dev_addr = msg.p2p_device_addr;
5236 else if (msg.device_id)
5237 p2p_dev_addr = msg.device_id;
5238 else {
5239 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
5240 p2p_parse_free(&msg);
5241 return -1;
5242 }
5243
5244 if (msg.oob_dev_password) {
5245 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
5246 msg.oob_dev_password_len);
5247 params->oob_dev_pw_len = msg.oob_dev_password_len;
5248 }
5249
5250 dev = p2p_create_device(p2p, p2p_dev_addr);
5251 if (dev == NULL) {
5252 p2p_parse_free(&msg);
5253 return -1;
5254 }
5255
5256 params->peer = &dev->info;
5257
5258 os_get_reltime(&dev->last_seen);
5259 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
5260 p2p_copy_wps_info(p2p, dev, 0, &msg);
5261
5262 if (!msg.oob_go_neg_channel) {
5263 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
5264 p2p_parse_free(&msg);
5265 return -1;
5266 }
5267
5268 if (msg.oob_go_neg_channel[3] == 0 &&
5269 msg.oob_go_neg_channel[4] == 0)
5270 freq = 0;
5271 else
5272 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
5273 msg.oob_go_neg_channel[4]);
5274 if (freq < 0) {
5275 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
5276 p2p_parse_free(&msg);
5277 return -1;
5278 }
5279 role = msg.oob_go_neg_channel[5];
5280
5281 if (role == P2P_GO_IN_A_GROUP) {
5282 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
5283 params->go_freq = freq;
5284 } else if (role == P2P_CLIENT_IN_A_GROUP) {
5285 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
5286 freq);
5287 params->go_freq = freq;
5288 } else
5289 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
5290 dev->oob_go_neg_freq = freq;
5291
5292 if (!params->sel && role != P2P_GO_IN_A_GROUP) {
5293 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
5294 p2p->cfg->channel);
5295 if (freq < 0) {
5296 p2p_dbg(p2p, "Own listen channel not known");
5297 p2p_parse_free(&msg);
5298 return -1;
5299 }
5300 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
5301 dev->oob_go_neg_freq = freq;
5302 }
5303
5304 if (msg.group_id) {
5305 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
5306 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
5307 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
5308 params->go_ssid_len);
5309 }
5310
5311 if (dev->flags & P2P_DEV_USER_REJECTED) {
5312 p2p_dbg(p2p, "Do not report rejected device");
5313 p2p_parse_free(&msg);
5314 return 0;
5315 }
5316
5317 if (!(dev->flags & P2P_DEV_REPORTED)) {
5318 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
5319 !(dev->flags & P2P_DEV_REPORTED_ONCE));
5320 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
5321 }
5322 p2p_parse_free(&msg);
5323
5324 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
5325 params->next_step = BOTH_GO;
5326 else if (role == P2P_GO_IN_A_GROUP)
5327 params->next_step = JOIN_GROUP;
5328 else if (role == P2P_CLIENT_IN_A_GROUP) {
5329 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
5330 params->next_step = PEER_CLIENT;
5331 } else if (p2p->num_groups > 0)
5332 params->next_step = AUTH_JOIN;
5333 else if (params->sel)
5334 params->next_step = INIT_GO_NEG;
5335 else
5336 params->next_step = RESP_GO_NEG;
5337
5338 return 0;
5339 }
5340
5341
5342 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
5343 int go_intent,
5344 const u8 *own_interface_addr)
5345 {
5346
5347 p2p->authorized_oob_dev_pw_id = dev_pw_id;
5348 if (dev_pw_id == 0) {
5349 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
5350 return;
5351 }
5352
5353 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
5354 dev_pw_id);
5355
5356 p2p->go_intent = go_intent;
5357 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
5358 }
5359
5360 #endif /* CONFIG_WPS_NFC */
5361
5362
5363 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
5364 {
5365 if (len < 8 || len > 63)
5366 return -1;
5367 p2p->cfg->passphrase_len = len;
5368 return 0;
5369 }
5370
5371
5372 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
5373 {
5374 p2p->vendor_elem = vendor_elem;
5375 }
5376
5377
5378 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
5379 {
5380 struct p2p_data *p2p = eloop_ctx;
5381
5382 p2p_dbg(p2p,
5383 "Timeout on waiting peer to become ready for GO Negotiation");
5384 p2p_go_neg_failed(p2p, -1);
5385 }
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