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 <log/log.h>
12 #include "common.h"
13 #include "eloop.h"
14 #include "common/defs.h"
15 #include "common/ieee802_11_defs.h"
16 #include "common/ieee802_11_common.h"
17 #include "common/wpa_ctrl.h"
18 #include "crypto/sha256.h"
19 #include "crypto/crypto.h"
20 #include "wps/wps_i.h"
21 #include "p2p_i.h"
22 #include "p2p.h"
23
24
25 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
26 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
27 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
28 const u8 *sa, const u8 *data, size_t len,
29 int rx_freq);
30 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
31 const u8 *sa, const u8 *data,
32 size_t len);
33 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
34 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
35
36
37 /*
38 * p2p_scan recovery timeout
39 *
40 * Many drivers are using 30 second timeout on scan results. Allow a bit larger
41 * timeout for this to avoid hitting P2P timeout unnecessarily.
42 */
43 #define P2P_SCAN_TIMEOUT 35
44
45 /**
46 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
47 * entries will be removed
48 */
49 #ifndef P2P_PEER_EXPIRATION_AGE
50 #define P2P_PEER_EXPIRATION_AGE 60
51 #endif /* P2P_PEER_EXPIRATION_AGE */
52
53
p2p_expire_peers(struct p2p_data * p2p)54 void p2p_expire_peers(struct p2p_data *p2p)
55 {
56 struct p2p_device *dev, *n;
57 struct os_reltime now;
58 size_t i;
59
60 os_get_reltime(&now);
61 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
62 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
63 continue;
64
65 if (dev == p2p->go_neg_peer) {
66 /*
67 * GO Negotiation is in progress with the peer, so
68 * don't expire the peer entry until GO Negotiation
69 * fails or times out.
70 */
71 continue;
72 }
73
74 if (p2p->cfg->go_connected &&
75 p2p->cfg->go_connected(p2p->cfg->cb_ctx,
76 dev->info.p2p_device_addr)) {
77 /*
78 * We are connected as a client to a group in which the
79 * peer is the GO, so do not expire the peer entry.
80 */
81 os_get_reltime(&dev->last_seen);
82 continue;
83 }
84
85 for (i = 0; i < p2p->num_groups; i++) {
86 if (p2p_group_is_client_connected(
87 p2p->groups[i], dev->info.p2p_device_addr))
88 break;
89 }
90 if (i < p2p->num_groups) {
91 /*
92 * The peer is connected as a client in a group where
93 * we are the GO, so do not expire the peer entry.
94 */
95 os_get_reltime(&dev->last_seen);
96 continue;
97 }
98
99 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
100 MAC2STR(dev->info.p2p_device_addr));
101 dl_list_del(&dev->list);
102 p2p_device_free(p2p, dev);
103 }
104 }
105
106
p2p_state_txt(int state)107 static const char * p2p_state_txt(int state)
108 {
109 switch (state) {
110 case P2P_IDLE:
111 return "IDLE";
112 case P2P_SEARCH:
113 return "SEARCH";
114 case P2P_CONNECT:
115 return "CONNECT";
116 case P2P_CONNECT_LISTEN:
117 return "CONNECT_LISTEN";
118 case P2P_GO_NEG:
119 return "GO_NEG";
120 case P2P_LISTEN_ONLY:
121 return "LISTEN_ONLY";
122 case P2P_WAIT_PEER_CONNECT:
123 return "WAIT_PEER_CONNECT";
124 case P2P_WAIT_PEER_IDLE:
125 return "WAIT_PEER_IDLE";
126 case P2P_SD_DURING_FIND:
127 return "SD_DURING_FIND";
128 case P2P_PROVISIONING:
129 return "PROVISIONING";
130 case P2P_PD_DURING_FIND:
131 return "PD_DURING_FIND";
132 case P2P_INVITE:
133 return "INVITE";
134 case P2P_INVITE_LISTEN:
135 return "INVITE_LISTEN";
136 default:
137 return "?";
138 }
139 }
140
141
p2p_get_state_txt(struct p2p_data * p2p)142 const char * p2p_get_state_txt(struct p2p_data *p2p)
143 {
144 return p2p_state_txt(p2p->state);
145 }
146
147
p2p_get_p2ps_adv_list(struct p2p_data * p2p)148 struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p)
149 {
150 return p2p ? p2p->p2ps_adv_list : NULL;
151 }
152
153
p2p_set_intended_addr(struct p2p_data * p2p,const u8 * intended_addr)154 void p2p_set_intended_addr(struct p2p_data *p2p, const u8 *intended_addr)
155 {
156 if (p2p && intended_addr)
157 os_memcpy(p2p->intended_addr, intended_addr, ETH_ALEN);
158 }
159
160
p2p_get_provisioning_info(struct p2p_data * p2p,const u8 * addr)161 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
162 {
163 struct p2p_device *dev = NULL;
164
165 if (!addr || !p2p)
166 return 0;
167
168 dev = p2p_get_device(p2p, addr);
169 if (dev)
170 return dev->wps_prov_info;
171 else
172 return 0;
173 }
174
175
p2p_clear_provisioning_info(struct p2p_data * p2p,const u8 * addr)176 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
177 {
178 struct p2p_device *dev = NULL;
179
180 if (!addr || !p2p)
181 return;
182
183 dev = p2p_get_device(p2p, addr);
184 if (dev)
185 dev->wps_prov_info = 0;
186 }
187
188
p2p_set_state(struct p2p_data * p2p,int new_state)189 void p2p_set_state(struct p2p_data *p2p, int new_state)
190 {
191 p2p_dbg(p2p, "State %s -> %s",
192 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
193 p2p->state = new_state;
194
195 if (new_state == P2P_IDLE && p2p->pending_channel) {
196 p2p_dbg(p2p, "Apply change in listen channel");
197 p2p->cfg->reg_class = p2p->pending_reg_class;
198 p2p->cfg->channel = p2p->pending_channel;
199 p2p->pending_reg_class = 0;
200 p2p->pending_channel = 0;
201 }
202 }
203
204
p2p_set_timeout(struct p2p_data * p2p,unsigned int sec,unsigned int usec)205 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
206 {
207 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
208 p2p_state_txt(p2p->state), sec, usec);
209 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
210 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
211 }
212
213
p2p_clear_timeout(struct p2p_data * p2p)214 void p2p_clear_timeout(struct p2p_data *p2p)
215 {
216 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
217 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
218 }
219
220
p2p_go_neg_failed(struct p2p_data * p2p,int status)221 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
222 {
223 struct p2p_go_neg_results res;
224 struct p2p_device *peer = p2p->go_neg_peer;
225
226 if (!peer)
227 return;
228
229 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
230 if (p2p->state != P2P_SEARCH) {
231 /*
232 * Clear timeouts related to GO Negotiation if no new p2p_find
233 * has been started.
234 */
235 p2p_clear_timeout(p2p);
236 p2p_set_state(p2p, P2P_IDLE);
237 }
238
239 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
240 peer->wps_method = WPS_NOT_READY;
241 peer->oob_pw_id = 0;
242 wpabuf_free(peer->go_neg_conf);
243 peer->go_neg_conf = NULL;
244 p2p->go_neg_peer = NULL;
245
246 os_memset(&res, 0, sizeof(res));
247 res.status = status;
248 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
249 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
250 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
251 }
252
253
p2p_listen_in_find(struct p2p_data * p2p,int dev_disc)254 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
255 {
256 unsigned int r, tu;
257 int freq;
258 struct wpabuf *ies;
259
260 p2p_dbg(p2p, "Starting short listen state (state=%s)",
261 p2p_state_txt(p2p->state));
262
263 if (p2p->pending_listen_freq) {
264 /* We have a pending p2p_listen request */
265 p2p_dbg(p2p, "p2p_listen command pending already");
266 return;
267 }
268
269 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
270 if (freq < 0) {
271 p2p_dbg(p2p, "Unknown regulatory class/channel");
272 return;
273 }
274
275 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
276 r = 0;
277 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
278 p2p->min_disc_int) * 100;
279 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
280 tu = p2p->max_disc_tu;
281 if (!dev_disc && tu < 100)
282 tu = 100; /* Need to wait in non-device discovery use cases */
283 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
284 tu = p2p->cfg->max_listen * 1000 / 1024;
285
286 if (tu == 0) {
287 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
288 p2p_set_timeout(p2p, 0, 0);
289 return;
290 }
291
292 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
293 if (ies == NULL)
294 return;
295
296 p2p->pending_listen_freq = freq;
297 p2p->pending_listen_sec = 0;
298 p2p->pending_listen_usec = 1024 * tu;
299
300 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
301 ies) < 0) {
302 p2p_dbg(p2p, "Failed to start listen mode");
303 p2p->pending_listen_freq = 0;
304 }
305 wpabuf_free(ies);
306 }
307
308
p2p_listen(struct p2p_data * p2p,unsigned int timeout)309 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
310 {
311 int freq;
312 struct wpabuf *ies;
313
314 p2p_dbg(p2p, "Going to listen(only) state");
315
316 if (p2p->pending_listen_freq) {
317 /* We have a pending p2p_listen request */
318 p2p_dbg(p2p, "p2p_listen command pending already");
319 return -1;
320 }
321
322 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
323 if (freq < 0) {
324 p2p_dbg(p2p, "Unknown regulatory class/channel");
325 return -1;
326 }
327
328 p2p->pending_listen_sec = timeout / 1000;
329 p2p->pending_listen_usec = (timeout % 1000) * 1000;
330
331 if (p2p->p2p_scan_running) {
332 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
333 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
334 return 0;
335 }
336 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
337 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
338 return 0;
339 }
340
341 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
342 if (ies == NULL)
343 return -1;
344
345 p2p->pending_listen_freq = freq;
346
347 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
348 p2p_dbg(p2p, "Failed to start listen mode");
349 p2p->pending_listen_freq = 0;
350 wpabuf_free(ies);
351 return -1;
352 }
353 wpabuf_free(ies);
354
355 p2p_set_state(p2p, P2P_LISTEN_ONLY);
356
357 return 0;
358 }
359
360
p2p_device_clear_reported(struct p2p_data * p2p)361 static void p2p_device_clear_reported(struct p2p_data *p2p)
362 {
363 struct p2p_device *dev;
364 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
365 dev->flags &= ~P2P_DEV_REPORTED;
366 dev->sd_reqs = 0;
367 }
368 }
369
370
371 /**
372 * p2p_get_device - Fetch a peer entry
373 * @p2p: P2P module context from p2p_init()
374 * @addr: P2P Device Address of the peer
375 * Returns: Pointer to the device entry or %NULL if not found
376 */
p2p_get_device(struct p2p_data * p2p,const u8 * addr)377 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
378 {
379 struct p2p_device *dev;
380 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
381 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
382 return dev;
383 }
384 return NULL;
385 }
386
387
388 /**
389 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
390 * @p2p: P2P module context from p2p_init()
391 * @addr: P2P Interface Address of the peer
392 * Returns: Pointer to the device entry or %NULL if not found
393 */
p2p_get_device_interface(struct p2p_data * p2p,const u8 * addr)394 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
395 const u8 *addr)
396 {
397 struct p2p_device *dev;
398 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
399 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
400 return dev;
401 }
402 return NULL;
403 }
404
405
406 /**
407 * p2p_create_device - Create a peer entry
408 * @p2p: P2P module context from p2p_init()
409 * @addr: P2P Device Address of the peer
410 * Returns: Pointer to the device entry or %NULL on failure
411 *
412 * If there is already an entry for the peer, it will be returned instead of
413 * creating a new one.
414 */
p2p_create_device(struct p2p_data * p2p,const u8 * addr)415 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
416 const u8 *addr)
417 {
418 struct p2p_device *dev, *oldest = NULL;
419 size_t count = 0;
420
421 dev = p2p_get_device(p2p, addr);
422 if (dev)
423 return dev;
424
425 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
426 count++;
427 if (oldest == NULL ||
428 os_reltime_before(&dev->last_seen, &oldest->last_seen))
429 oldest = dev;
430 }
431 if (count + 1 > p2p->cfg->max_peers && oldest) {
432 p2p_dbg(p2p,
433 "Remove oldest peer entry to make room for a new peer "
434 MACSTR, MAC2STR(oldest->info.p2p_device_addr));
435 dl_list_del(&oldest->list);
436 p2p_device_free(p2p, oldest);
437 }
438
439 dev = os_zalloc(sizeof(*dev));
440 if (dev == NULL)
441 return NULL;
442 dl_list_add(&p2p->devices, &dev->list);
443 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
444
445 return dev;
446 }
447
448
p2p_copy_client_info(struct p2p_device * dev,struct p2p_client_info * cli)449 static void p2p_copy_client_info(struct p2p_device *dev,
450 struct p2p_client_info *cli)
451 {
452 p2p_copy_filter_devname(dev->info.device_name,
453 sizeof(dev->info.device_name),
454 cli->dev_name, cli->dev_name_len);
455 dev->info.dev_capab = cli->dev_capab;
456 dev->info.config_methods = cli->config_methods;
457 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
458 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
459 if (dev->info.wps_sec_dev_type_list_len > WPS_SEC_DEV_TYPE_MAX_LEN) {
460 android_errorWriteLog(0x534e4554, "172937525");
461 dev->info.wps_sec_dev_type_list_len = WPS_SEC_DEV_TYPE_MAX_LEN;
462 }
463 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
464 dev->info.wps_sec_dev_type_list_len);
465 }
466
467
p2p_add_group_clients(struct p2p_data * p2p,const u8 * go_dev_addr,const u8 * go_interface_addr,int freq,const u8 * gi,size_t gi_len,struct os_reltime * rx_time)468 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
469 const u8 *go_interface_addr, int freq,
470 const u8 *gi, size_t gi_len,
471 struct os_reltime *rx_time)
472 {
473 struct p2p_group_info info;
474 size_t c;
475 struct p2p_device *dev;
476
477 if (gi == NULL)
478 return 0;
479
480 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
481 return -1;
482
483 /*
484 * Clear old data for this group; if the devices are still in the
485 * group, the information will be restored in the loop following this.
486 */
487 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
488 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
489 ETH_ALEN) == 0) {
490 os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
491 os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
492 }
493 }
494
495 for (c = 0; c < info.num_clients; c++) {
496 struct p2p_client_info *cli = &info.client[c];
497 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
498 ETH_ALEN) == 0)
499 continue; /* ignore our own entry */
500 dev = p2p_get_device(p2p, cli->p2p_device_addr);
501 if (dev) {
502 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
503 P2P_DEV_PROBE_REQ_ONLY)) {
504 /*
505 * Update information since we have not
506 * received this directly from the client.
507 */
508 p2p_copy_client_info(dev, cli);
509 } else {
510 /*
511 * Need to update P2P Client Discoverability
512 * flag since it is valid only in P2P Group
513 * Info attribute.
514 */
515 dev->info.dev_capab &=
516 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
517 dev->info.dev_capab |=
518 cli->dev_capab &
519 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
520 }
521 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
522 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
523 }
524 } else {
525 dev = p2p_create_device(p2p, cli->p2p_device_addr);
526 if (dev == NULL)
527 continue;
528 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
529 p2p_copy_client_info(dev, cli);
530 dev->oper_freq = freq;
531 p2p->cfg->dev_found(p2p->cfg->cb_ctx,
532 dev->info.p2p_device_addr,
533 &dev->info, 1);
534 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
535 }
536
537 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
538 ETH_ALEN);
539 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
540 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
541 os_memcpy(dev->member_in_go_iface, go_interface_addr,
542 ETH_ALEN);
543 dev->flags |= P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT;
544 }
545
546 return 0;
547 }
548
549
p2p_copy_wps_info(struct p2p_data * p2p,struct p2p_device * dev,int probe_req,const struct p2p_message * msg)550 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
551 int probe_req, const struct p2p_message *msg)
552 {
553 os_memcpy(dev->info.device_name, msg->device_name,
554 sizeof(dev->info.device_name));
555
556 if (msg->manufacturer &&
557 msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
558 os_memset(dev->info.manufacturer, 0,
559 sizeof(dev->info.manufacturer));
560 os_memcpy(dev->info.manufacturer, msg->manufacturer,
561 msg->manufacturer_len);
562 }
563
564 if (msg->model_name &&
565 msg->model_name_len < sizeof(dev->info.model_name)) {
566 os_memset(dev->info.model_name, 0,
567 sizeof(dev->info.model_name));
568 os_memcpy(dev->info.model_name, msg->model_name,
569 msg->model_name_len);
570 }
571
572 if (msg->model_number &&
573 msg->model_number_len < sizeof(dev->info.model_number)) {
574 os_memset(dev->info.model_number, 0,
575 sizeof(dev->info.model_number));
576 os_memcpy(dev->info.model_number, msg->model_number,
577 msg->model_number_len);
578 }
579
580 if (msg->serial_number &&
581 msg->serial_number_len < sizeof(dev->info.serial_number)) {
582 os_memset(dev->info.serial_number, 0,
583 sizeof(dev->info.serial_number));
584 os_memcpy(dev->info.serial_number, msg->serial_number,
585 msg->serial_number_len);
586 }
587
588 if (msg->pri_dev_type)
589 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
590 sizeof(dev->info.pri_dev_type));
591 else if (msg->wps_pri_dev_type)
592 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
593 sizeof(dev->info.pri_dev_type));
594
595 if (msg->wps_sec_dev_type_list) {
596 os_memcpy(dev->info.wps_sec_dev_type_list,
597 msg->wps_sec_dev_type_list,
598 msg->wps_sec_dev_type_list_len);
599 dev->info.wps_sec_dev_type_list_len =
600 msg->wps_sec_dev_type_list_len;
601 }
602
603 if (msg->capability) {
604 /*
605 * P2P Client Discoverability bit is reserved in all frames
606 * that use this function, so do not change its value here.
607 */
608 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
609 dev->info.dev_capab |= msg->capability[0] &
610 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
611 dev->info.group_capab = msg->capability[1];
612 }
613
614 if (msg->ext_listen_timing) {
615 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
616 dev->ext_listen_interval =
617 WPA_GET_LE16(msg->ext_listen_timing + 2);
618 }
619
620 if (!probe_req) {
621 u16 new_config_methods;
622 new_config_methods = msg->config_methods ?
623 msg->config_methods : msg->wps_config_methods;
624 if (new_config_methods &&
625 dev->info.config_methods != new_config_methods) {
626 p2p_dbg(p2p, "Update peer " MACSTR
627 " config_methods 0x%x -> 0x%x",
628 MAC2STR(dev->info.p2p_device_addr),
629 dev->info.config_methods,
630 new_config_methods);
631 dev->info.config_methods = new_config_methods;
632 }
633 }
634 }
635
636
p2p_update_peer_vendor_elems(struct p2p_device * dev,const u8 * ies,size_t ies_len)637 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
638 size_t ies_len)
639 {
640 const u8 *pos, *end;
641 u8 id, len;
642
643 wpabuf_free(dev->info.vendor_elems);
644 dev->info.vendor_elems = NULL;
645
646 end = ies + ies_len;
647
648 for (pos = ies; end - pos > 1; pos += len) {
649 id = *pos++;
650 len = *pos++;
651
652 if (len > end - pos)
653 break;
654
655 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
656 continue;
657
658 if (len >= 4) {
659 u32 type = WPA_GET_BE32(pos);
660
661 if (type == WPA_IE_VENDOR_TYPE ||
662 type == WMM_IE_VENDOR_TYPE ||
663 type == WPS_IE_VENDOR_TYPE ||
664 type == P2P_IE_VENDOR_TYPE ||
665 type == WFD_IE_VENDOR_TYPE)
666 continue;
667 }
668
669 /* Unknown vendor element - make raw IE data available */
670 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
671 break;
672 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
673 if (wpabuf_size(dev->info.vendor_elems) > 2000)
674 break;
675 }
676 }
677
678
p2p_compare_wfd_info(struct p2p_device * dev,const struct p2p_message * msg)679 static int p2p_compare_wfd_info(struct p2p_device *dev,
680 const struct p2p_message *msg)
681 {
682 if (dev->info.wfd_subelems && msg->wfd_subelems) {
683 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
684 return 1;
685
686 return os_memcmp(dev->info.wfd_subelems->buf,
687 msg->wfd_subelems->buf,
688 dev->info.wfd_subelems->used);
689 }
690 if (dev->info.wfd_subelems || msg->wfd_subelems)
691 return 1;
692
693 return 0;
694 }
695
696
697 /**
698 * p2p_add_device - Add peer entries based on scan results or P2P frames
699 * @p2p: P2P module context from p2p_init()
700 * @addr: Source address of Beacon or Probe Response frame (may be either
701 * P2P Device Address or P2P Interface Address)
702 * @level: Signal level (signal strength of the received frame from the peer)
703 * @freq: Frequency on which the Beacon or Probe Response frame was received
704 * @rx_time: Time when the result was received
705 * @ies: IEs from the Beacon or Probe Response frame
706 * @ies_len: Length of ies buffer in octets
707 * @scan_res: Whether this was based on scan results
708 * Returns: 0 on success, -1 on failure
709 *
710 * If the scan result is for a GO, the clients in the group will also be added
711 * to the peer table. This function can also be used with some other frames
712 * like Provision Discovery Request that contains P2P Capability and P2P Device
713 * Info attributes.
714 */
p2p_add_device(struct p2p_data * p2p,const u8 * addr,int freq,struct os_reltime * rx_time,int level,const u8 * ies,size_t ies_len,int scan_res)715 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
716 struct os_reltime *rx_time, int level, const u8 *ies,
717 size_t ies_len, int scan_res)
718 {
719 struct p2p_device *dev;
720 struct p2p_message msg;
721 const u8 *p2p_dev_addr;
722 int wfd_changed;
723 int dev_name_changed;
724 int i;
725 struct os_reltime time_now;
726
727 os_memset(&msg, 0, sizeof(msg));
728 if (p2p_parse_ies(ies, ies_len, &msg)) {
729 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
730 p2p_parse_free(&msg);
731 return -1;
732 }
733
734 if (msg.p2p_device_addr)
735 p2p_dev_addr = msg.p2p_device_addr;
736 else if (msg.device_id)
737 p2p_dev_addr = msg.device_id;
738 else {
739 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
740 p2p_parse_free(&msg);
741 return -1;
742 }
743
744 if (!is_zero_ether_addr(p2p->peer_filter) &&
745 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
746 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
747 " due to peer filter", MAC2STR(p2p_dev_addr));
748 p2p_parse_free(&msg);
749 return 0;
750 }
751
752 dev = p2p_create_device(p2p, p2p_dev_addr);
753 if (dev == NULL) {
754 p2p_parse_free(&msg);
755 return -1;
756 }
757
758 if (rx_time == NULL) {
759 os_get_reltime(&time_now);
760 rx_time = &time_now;
761 }
762
763 /*
764 * Update the device entry only if the new peer
765 * entry is newer than the one previously stored, or if
766 * the device was previously seen as a P2P Client in a group
767 * and the new entry isn't older than a threshold.
768 */
769 if (dev->last_seen.sec > 0 &&
770 os_reltime_before(rx_time, &dev->last_seen) &&
771 (!(dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT) ||
772 os_reltime_expired(&dev->last_seen, rx_time,
773 P2P_DEV_GROUP_CLIENT_RESP_THRESHOLD))) {
774 p2p_dbg(p2p,
775 "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u flags=0x%x)",
776 (unsigned int) rx_time->sec,
777 (unsigned int) rx_time->usec,
778 (unsigned int) dev->last_seen.sec,
779 (unsigned int) dev->last_seen.usec,
780 dev->flags);
781 p2p_parse_free(&msg);
782 return -1;
783 }
784
785 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
786
787 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY |
788 P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT);
789
790 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
791 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
792 if (msg.ssid &&
793 msg.ssid[1] <= sizeof(dev->oper_ssid) &&
794 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
795 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
796 != 0)) {
797 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
798 dev->oper_ssid_len = msg.ssid[1];
799 }
800
801 wpabuf_free(dev->info.p2ps_instance);
802 dev->info.p2ps_instance = NULL;
803 if (msg.adv_service_instance && msg.adv_service_instance_len)
804 dev->info.p2ps_instance = wpabuf_alloc_copy(
805 msg.adv_service_instance, msg.adv_service_instance_len);
806
807 if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
808 *msg.ds_params >= 1 && *msg.ds_params <= 14) {
809 int ds_freq;
810 if (*msg.ds_params == 14)
811 ds_freq = 2484;
812 else
813 ds_freq = 2407 + *msg.ds_params * 5;
814 if (freq != ds_freq) {
815 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
816 freq, ds_freq);
817 freq = ds_freq;
818 }
819 }
820
821 if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
822 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
823 MACSTR " %d -> %d MHz (DS param %d)",
824 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
825 freq, msg.ds_params ? *msg.ds_params : -1);
826 }
827 if (scan_res) {
828 dev->listen_freq = freq;
829 if (msg.group_info)
830 dev->oper_freq = freq;
831 }
832 dev->info.level = level;
833
834 dev_name_changed = os_strncmp(dev->info.device_name, msg.device_name,
835 WPS_DEV_NAME_MAX_LEN) != 0;
836
837 p2p_copy_wps_info(p2p, dev, 0, &msg);
838
839 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
840 wpabuf_free(dev->info.wps_vendor_ext[i]);
841 dev->info.wps_vendor_ext[i] = NULL;
842 }
843
844 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
845 if (msg.wps_vendor_ext[i] == NULL)
846 break;
847 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
848 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
849 if (dev->info.wps_vendor_ext[i] == NULL)
850 break;
851 }
852
853 wfd_changed = p2p_compare_wfd_info(dev, &msg);
854
855 if (wfd_changed) {
856 wpabuf_free(dev->info.wfd_subelems);
857 if (msg.wfd_subelems)
858 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
859 else
860 dev->info.wfd_subelems = NULL;
861 }
862
863 if (scan_res) {
864 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
865 msg.group_info, msg.group_info_len,
866 rx_time);
867 }
868
869 p2p_parse_free(&msg);
870
871 p2p_update_peer_vendor_elems(dev, ies, ies_len);
872
873 if (dev->flags & P2P_DEV_REPORTED && !wfd_changed &&
874 !dev_name_changed &&
875 (!msg.adv_service_instance ||
876 (dev->flags & P2P_DEV_P2PS_REPORTED)))
877 return 0;
878
879 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
880 freq, (unsigned int) rx_time->sec,
881 (unsigned int) rx_time->usec);
882 if (dev->flags & P2P_DEV_USER_REJECTED) {
883 p2p_dbg(p2p, "Do not report rejected device");
884 return 0;
885 }
886
887 if (dev->info.config_methods == 0 &&
888 (freq == 2412 || freq == 2437 || freq == 2462)) {
889 /*
890 * If we have only seen a Beacon frame from a GO, we do not yet
891 * know what WPS config methods it supports. Since some
892 * applications use config_methods value from P2P-DEVICE-FOUND
893 * events, postpone reporting this peer until we've fully
894 * discovered its capabilities.
895 *
896 * At least for now, do this only if the peer was detected on
897 * one of the social channels since that peer can be easily be
898 * found again and there are no limitations of having to use
899 * passive scan on this channels, so this can be done through
900 * Probe Response frame that includes the config_methods
901 * information.
902 */
903 p2p_dbg(p2p, "Do not report peer " MACSTR
904 " with unknown config methods", MAC2STR(addr));
905 return 0;
906 }
907
908 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
909 !(dev->flags & P2P_DEV_REPORTED_ONCE));
910 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
911
912 if (msg.adv_service_instance)
913 dev->flags |= P2P_DEV_P2PS_REPORTED;
914
915 return 0;
916 }
917
918
p2p_device_free(struct p2p_data * p2p,struct p2p_device * dev)919 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
920 {
921 int i;
922
923 if (p2p->go_neg_peer == dev) {
924 /*
925 * If GO Negotiation is in progress, report that it has failed.
926 */
927 p2p_go_neg_failed(p2p, -1);
928 }
929 if (p2p->invite_peer == dev)
930 p2p->invite_peer = NULL;
931 if (p2p->sd_peer == dev)
932 p2p->sd_peer = NULL;
933 if (p2p->pending_client_disc_go == dev)
934 p2p->pending_client_disc_go = NULL;
935
936 /* dev_lost() device, but only if it was previously dev_found() */
937 if (dev->flags & P2P_DEV_REPORTED_ONCE)
938 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
939 dev->info.p2p_device_addr);
940
941 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
942 wpabuf_free(dev->info.wps_vendor_ext[i]);
943 dev->info.wps_vendor_ext[i] = NULL;
944 }
945
946 wpabuf_free(dev->info.wfd_subelems);
947 wpabuf_free(dev->info.vendor_elems);
948 wpabuf_free(dev->go_neg_conf);
949 wpabuf_free(dev->info.p2ps_instance);
950
951 os_free(dev);
952 }
953
954
p2p_get_next_prog_freq(struct p2p_data * p2p)955 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
956 {
957 struct p2p_channels *c;
958 struct p2p_reg_class *cla;
959 size_t cl, ch;
960 int found = 0;
961 u8 reg_class;
962 u8 channel;
963 int freq;
964
965 c = &p2p->cfg->channels;
966 for (cl = 0; cl < c->reg_classes; cl++) {
967 cla = &c->reg_class[cl];
968 if (cla->reg_class != p2p->last_prog_scan_class)
969 continue;
970 for (ch = 0; ch < cla->channels; ch++) {
971 if (cla->channel[ch] == p2p->last_prog_scan_chan) {
972 found = 1;
973 break;
974 }
975 }
976 if (found)
977 break;
978 }
979
980 if (!found) {
981 /* Start from beginning */
982 reg_class = c->reg_class[0].reg_class;
983 channel = c->reg_class[0].channel[0];
984 } else {
985 /* Pick the next channel */
986 ch++;
987 if (ch == cla->channels) {
988 cl++;
989 if (cl == c->reg_classes)
990 cl = 0;
991 ch = 0;
992 }
993 reg_class = c->reg_class[cl].reg_class;
994 channel = c->reg_class[cl].channel[ch];
995 }
996
997 freq = p2p_channel_to_freq(reg_class, channel);
998 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
999 reg_class, channel, freq);
1000 p2p->last_prog_scan_class = reg_class;
1001 p2p->last_prog_scan_chan = channel;
1002
1003 if (freq == 2412 || freq == 2437 || freq == 2462)
1004 return 0; /* No need to add social channels */
1005 return freq;
1006 }
1007
1008
p2p_search(struct p2p_data * p2p)1009 static void p2p_search(struct p2p_data *p2p)
1010 {
1011 int freq = 0;
1012 enum p2p_scan_type type;
1013 u16 pw_id = DEV_PW_DEFAULT;
1014 int res;
1015
1016 if (p2p->drv_in_listen) {
1017 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
1018 return;
1019 }
1020 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1021
1022 if (p2p->find_pending_full &&
1023 (p2p->find_type == P2P_FIND_PROGRESSIVE ||
1024 p2p->find_type == P2P_FIND_START_WITH_FULL)) {
1025 type = P2P_SCAN_FULL;
1026 p2p_dbg(p2p, "Starting search (pending full scan)");
1027 p2p->find_pending_full = 0;
1028 } else if ((p2p->find_type == P2P_FIND_PROGRESSIVE &&
1029 (freq = p2p_get_next_prog_freq(p2p)) > 0) ||
1030 (p2p->find_type == P2P_FIND_START_WITH_FULL &&
1031 (freq = p2p->find_specified_freq) > 0)) {
1032 type = P2P_SCAN_SOCIAL_PLUS_ONE;
1033 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
1034 } else {
1035 type = P2P_SCAN_SOCIAL;
1036 p2p_dbg(p2p, "Starting search");
1037 }
1038
1039 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
1040 p2p->num_req_dev_types, p2p->req_dev_types,
1041 p2p->find_dev_id, pw_id, p2p->include_6ghz);
1042 if (res < 0) {
1043 p2p_dbg(p2p, "Scan request schedule failed");
1044 p2p_continue_find(p2p);
1045 }
1046 }
1047
1048
p2p_find_timeout(void * eloop_ctx,void * timeout_ctx)1049 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
1050 {
1051 struct p2p_data *p2p = eloop_ctx;
1052 p2p_dbg(p2p, "Find timeout -> stop");
1053 p2p_stop_find(p2p);
1054 }
1055
1056
p2p_notify_scan_trigger_status(struct p2p_data * p2p,int status)1057 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
1058 {
1059 if (status != 0) {
1060 p2p_dbg(p2p, "Scan request failed");
1061 /* Do continue find even for the first p2p_find_scan */
1062 p2p_continue_find(p2p);
1063 } else {
1064 p2p_dbg(p2p, "Running p2p_scan");
1065 p2p->p2p_scan_running = 1;
1066 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1067 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1068 p2p, NULL);
1069 }
1070 }
1071
1072
p2p_run_after_scan(struct p2p_data * p2p)1073 static int p2p_run_after_scan(struct p2p_data *p2p)
1074 {
1075 struct p2p_device *dev;
1076 enum p2p_after_scan op;
1077
1078 op = p2p->start_after_scan;
1079 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1080 switch (op) {
1081 case P2P_AFTER_SCAN_NOTHING:
1082 break;
1083 case P2P_AFTER_SCAN_LISTEN:
1084 p2p_dbg(p2p, "Start previously requested Listen state");
1085 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1086 p2p->pending_listen_usec / 1000);
1087 return 1;
1088 case P2P_AFTER_SCAN_CONNECT:
1089 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1090 MAC2STR(p2p->after_scan_peer));
1091 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1092 if (dev == NULL) {
1093 p2p_dbg(p2p, "Peer not known anymore");
1094 break;
1095 }
1096 p2p_connect_send(p2p, dev);
1097 return 1;
1098 }
1099
1100 return 0;
1101 }
1102
1103
p2p_scan_timeout(void * eloop_ctx,void * timeout_ctx)1104 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1105 {
1106 struct p2p_data *p2p = eloop_ctx;
1107 int running;
1108 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1109 running = p2p->p2p_scan_running;
1110 /* Make sure we recover from missed scan results callback */
1111 p2p->p2p_scan_running = 0;
1112
1113 if (running)
1114 p2p_run_after_scan(p2p);
1115 }
1116
1117
p2p_free_req_dev_types(struct p2p_data * p2p)1118 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1119 {
1120 p2p->num_req_dev_types = 0;
1121 os_free(p2p->req_dev_types);
1122 p2p->req_dev_types = NULL;
1123 }
1124
1125
p2ps_gen_hash(struct p2p_data * p2p,const char * str,u8 * hash)1126 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash)
1127 {
1128 u8 buf[SHA256_MAC_LEN];
1129 char str_buf[256];
1130 const u8 *adv_array;
1131 size_t i, adv_len;
1132
1133 if (!str || !hash)
1134 return 0;
1135
1136 if (!str[0]) {
1137 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1138 return 1;
1139 }
1140
1141 adv_array = (u8 *) str_buf;
1142 adv_len = os_strlen(str);
1143 if (adv_len >= sizeof(str_buf))
1144 return 0;
1145
1146 for (i = 0; i < adv_len; i++) {
1147 if (str[i] >= 'A' && str[i] <= 'Z')
1148 str_buf[i] = str[i] - 'A' + 'a';
1149 else
1150 str_buf[i] = str[i];
1151 }
1152
1153 if (sha256_vector(1, &adv_array, &adv_len, buf))
1154 return 0;
1155
1156 os_memcpy(hash, buf, P2PS_HASH_LEN);
1157 return 1;
1158 }
1159
1160
p2p_find(struct p2p_data * p2p,unsigned int timeout,enum p2p_discovery_type type,unsigned int num_req_dev_types,const u8 * req_dev_types,const u8 * dev_id,unsigned int search_delay,u8 seek_count,const char ** seek,int freq,bool include_6ghz)1161 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1162 enum p2p_discovery_type type,
1163 unsigned int num_req_dev_types, const u8 *req_dev_types,
1164 const u8 *dev_id, unsigned int search_delay,
1165 u8 seek_count, const char **seek, int freq, bool include_6ghz)
1166 {
1167 int res;
1168 struct os_reltime start;
1169
1170 p2p_dbg(p2p, "Starting find (type=%d)", type);
1171 if (p2p->p2p_scan_running) {
1172 p2p_dbg(p2p, "p2p_scan is already running");
1173 }
1174
1175 p2p_free_req_dev_types(p2p);
1176 if (req_dev_types && num_req_dev_types) {
1177 p2p->req_dev_types = os_memdup(req_dev_types,
1178 num_req_dev_types *
1179 WPS_DEV_TYPE_LEN);
1180 if (p2p->req_dev_types == NULL)
1181 return -1;
1182 p2p->num_req_dev_types = num_req_dev_types;
1183 }
1184
1185 if (dev_id) {
1186 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1187 p2p->find_dev_id = p2p->find_dev_id_buf;
1188 } else
1189 p2p->find_dev_id = NULL;
1190 p2p->include_6ghz = p2p_wfd_enabled(p2p) && include_6ghz;
1191 if (seek_count == 0 || !seek) {
1192 /* Not an ASP search */
1193 p2p->p2ps_seek = 0;
1194 } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) {
1195 /*
1196 * An empty seek string means no hash values, but still an ASP
1197 * search.
1198 */
1199 p2p_dbg(p2p, "ASP search");
1200 p2p->p2ps_seek_count = 0;
1201 p2p->p2ps_seek = 1;
1202 } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
1203 u8 buf[P2PS_HASH_LEN];
1204 int i, count = 0;
1205
1206 for (i = 0; i < seek_count; i++) {
1207 if (!p2ps_gen_hash(p2p, seek[i], buf))
1208 continue;
1209
1210 p2p_dbg(p2p, "Seek service %s hash " MACSTR,
1211 seek[i], MAC2STR(buf));
1212 os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN],
1213 buf, P2PS_HASH_LEN);
1214 count++;
1215 }
1216
1217 p2p->p2ps_seek_count = count;
1218 p2p->p2ps_seek = 1;
1219 } else {
1220 p2p->p2ps_seek_count = 0;
1221 p2p->p2ps_seek = 1;
1222 }
1223
1224 /* Special case to perform wildcard search */
1225 if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
1226 p2p->p2ps_seek_count = 1;
1227 os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash,
1228 P2PS_HASH_LEN);
1229 }
1230
1231 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1232 p2p_clear_timeout(p2p);
1233 if (p2p->pending_listen_freq) {
1234 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_find");
1235 p2p->pending_listen_freq = 0;
1236 }
1237 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1238 p2p->find_pending_full = 0;
1239 p2p->find_type = type;
1240 if (freq != 2412 && freq != 2437 && freq != 2462 && freq != 60480)
1241 p2p->find_specified_freq = freq;
1242 else
1243 p2p->find_specified_freq = 0;
1244 p2p_device_clear_reported(p2p);
1245 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN);
1246 p2p_set_state(p2p, P2P_SEARCH);
1247 p2p->search_delay = search_delay;
1248 p2p->in_search_delay = 0;
1249 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1250 p2p->last_p2p_find_timeout = timeout;
1251 if (timeout)
1252 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1253 p2p, NULL);
1254 os_get_reltime(&start);
1255 switch (type) {
1256 case P2P_FIND_START_WITH_FULL:
1257 if (freq > 0) {
1258 /*
1259 * Start with the specified channel and then move to
1260 * scans for social channels and this specific channel.
1261 */
1262 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx,
1263 P2P_SCAN_SPECIFIC, freq,
1264 p2p->num_req_dev_types,
1265 p2p->req_dev_types, dev_id,
1266 DEV_PW_DEFAULT,
1267 p2p->include_6ghz);
1268 break;
1269 }
1270 /* fall through */
1271 case P2P_FIND_PROGRESSIVE:
1272 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1273 p2p->num_req_dev_types,
1274 p2p->req_dev_types, dev_id,
1275 DEV_PW_DEFAULT, p2p->include_6ghz);
1276 break;
1277 case P2P_FIND_ONLY_SOCIAL:
1278 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1279 p2p->num_req_dev_types,
1280 p2p->req_dev_types, dev_id,
1281 DEV_PW_DEFAULT, p2p->include_6ghz);
1282 break;
1283 default:
1284 return -1;
1285 }
1286
1287 if (!res)
1288 p2p->find_start = start;
1289
1290 if (res != 0 && p2p->p2p_scan_running) {
1291 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1292 /* wait for the previous p2p_scan to complete */
1293 if (type == P2P_FIND_PROGRESSIVE ||
1294 (type == P2P_FIND_START_WITH_FULL && freq == 0))
1295 p2p->find_pending_full = 1;
1296 res = 0; /* do not report failure */
1297 } else if (res != 0) {
1298 p2p_dbg(p2p, "Failed to start p2p_scan");
1299 p2p_set_state(p2p, P2P_IDLE);
1300 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1301 }
1302
1303 return res;
1304 }
1305
1306
p2p_stop_find_for_freq(struct p2p_data * p2p,int freq)1307 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1308 {
1309 p2p_dbg(p2p, "Stopping find");
1310 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1311 p2p_clear_timeout(p2p);
1312 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
1313 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1314
1315 p2p->p2ps_seek_count = 0;
1316
1317 p2p_set_state(p2p, P2P_IDLE);
1318 p2p_free_req_dev_types(p2p);
1319 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1320 if (p2p->go_neg_peer)
1321 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1322 p2p->go_neg_peer = NULL;
1323 p2p->sd_peer = NULL;
1324 p2p->invite_peer = NULL;
1325 p2p_stop_listen_for_freq(p2p, freq);
1326 p2p->send_action_in_progress = 0;
1327 }
1328
1329
p2p_stop_listen_for_freq(struct p2p_data * p2p,int freq)1330 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1331 {
1332 if (freq > 0 &&
1333 ((p2p->drv_in_listen == freq && p2p->in_listen) ||
1334 p2p->pending_listen_freq == (unsigned int) freq)) {
1335 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1336 return;
1337 }
1338 if (p2p->in_listen) {
1339 p2p->in_listen = 0;
1340 p2p_clear_timeout(p2p);
1341 }
1342 if (p2p->drv_in_listen) {
1343 /*
1344 * The driver may not deliver callback to p2p_listen_end()
1345 * when the operation gets canceled, so clear the internal
1346 * variable that is tracking driver state.
1347 */
1348 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1349 p2p->drv_in_listen = 0;
1350 }
1351 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1352 }
1353
1354
p2p_stop_listen(struct p2p_data * p2p)1355 void p2p_stop_listen(struct p2p_data *p2p)
1356 {
1357 if (p2p->state != P2P_LISTEN_ONLY) {
1358 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1359 return;
1360 }
1361
1362 p2p_stop_listen_for_freq(p2p, 0);
1363 p2p_set_state(p2p, P2P_IDLE);
1364 }
1365
1366
p2p_stop_find(struct p2p_data * p2p)1367 void p2p_stop_find(struct p2p_data *p2p)
1368 {
1369 p2p->pending_listen_freq = 0;
1370 p2p_stop_find_for_freq(p2p, 0);
1371 }
1372
1373
p2p_prepare_channel_pref(struct p2p_data * p2p,unsigned int force_freq,unsigned int pref_freq,int go)1374 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1375 unsigned int force_freq,
1376 unsigned int pref_freq, int go)
1377 {
1378 u8 op_class, op_channel;
1379 unsigned int freq = force_freq ? force_freq : pref_freq;
1380
1381 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1382 force_freq, pref_freq, go);
1383 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1384 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1385 return -1;
1386 }
1387
1388 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1389 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1390 op_channel))) {
1391 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1392 freq, op_class, op_channel);
1393 return -1;
1394 }
1395
1396 p2p->op_reg_class = op_class;
1397 p2p->op_channel = op_channel;
1398
1399 if (force_freq) {
1400 p2p->channels.reg_classes = 1;
1401 p2p->channels.reg_class[0].channels = 1;
1402 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1403 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1404 } else {
1405 p2p_copy_channels(&p2p->channels, &p2p->cfg->channels,
1406 p2p->allow_6ghz);
1407 }
1408
1409 return 0;
1410 }
1411
1412
p2p_prepare_channel_best(struct p2p_data * p2p)1413 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1414 {
1415 u8 op_class, op_channel;
1416 const int op_classes_5ghz[] = { 124, 125, 115, 0 };
1417 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1418 const int op_classes_vht[] = { 128, 0 };
1419 const int op_classes_edmg[] = { 181, 182, 183, 0 };
1420 const int op_classes_6ghz[] = { 131, 0 };
1421
1422 p2p_dbg(p2p, "Prepare channel best");
1423
1424 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1425 p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1426 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1427 == 0) {
1428 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1429 p2p->op_reg_class = op_class;
1430 p2p->op_channel = op_channel;
1431 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1432 p2p_supported_freq(p2p, p2p->best_freq_5) &&
1433 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1434 == 0) {
1435 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1436 p2p->op_reg_class = op_class;
1437 p2p->op_channel = op_channel;
1438 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1439 p2p_supported_freq(p2p, p2p->best_freq_24) &&
1440 p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1441 &op_channel) == 0) {
1442 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1443 p2p->op_reg_class = op_class;
1444 p2p->op_channel = op_channel;
1445 } else if (p2p->cfg->num_pref_chan > 0 &&
1446 p2p_channels_includes(&p2p->cfg->channels,
1447 p2p->cfg->pref_chan[0].op_class,
1448 p2p->cfg->pref_chan[0].chan)) {
1449 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1450 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1451 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1452 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_edmg,
1453 &p2p->op_reg_class, &p2p->op_channel) ==
1454 0) {
1455 p2p_dbg(p2p, "Select possible EDMG channel (op_class %u channel %u) as operating channel preference",
1456 p2p->op_reg_class, p2p->op_channel);
1457 } else if (p2p->allow_6ghz &&
1458 (p2p_channel_select(&p2p->cfg->channels, op_classes_6ghz,
1459 &p2p->op_reg_class, &p2p->op_channel) ==
1460 0)) {
1461 p2p_dbg(p2p, "Select possible 6 GHz channel (op_class %u channel %u) as operating channel preference",
1462 p2p->op_reg_class, p2p->op_channel);
1463 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1464 &p2p->op_reg_class, &p2p->op_channel) ==
1465 0) {
1466 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1467 p2p->op_reg_class, p2p->op_channel);
1468 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1469 &p2p->op_reg_class, &p2p->op_channel) ==
1470 0) {
1471 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1472 p2p->op_reg_class, p2p->op_channel);
1473 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1474 &p2p->op_reg_class, &p2p->op_channel) ==
1475 0) {
1476 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1477 p2p->op_reg_class, p2p->op_channel);
1478 } else if (p2p_channels_includes(&p2p->cfg->channels,
1479 p2p->cfg->op_reg_class,
1480 p2p->cfg->op_channel)) {
1481 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1482 p2p->op_reg_class = p2p->cfg->op_reg_class;
1483 p2p->op_channel = p2p->cfg->op_channel;
1484 } else if (p2p_channel_random_social(&p2p->cfg->channels,
1485 &p2p->op_reg_class,
1486 &p2p->op_channel,
1487 NULL, NULL) == 0) {
1488 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1489 p2p->op_reg_class, p2p->op_channel);
1490 } else {
1491 /* Select any random available channel from the first available
1492 * operating class */
1493 p2p_channel_select(&p2p->cfg->channels, NULL,
1494 &p2p->op_reg_class,
1495 &p2p->op_channel);
1496 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1497 p2p->op_channel, p2p->op_reg_class);
1498 }
1499
1500 p2p_copy_channels(&p2p->channels, &p2p->cfg->channels, p2p->allow_6ghz);
1501 }
1502
1503
1504 /**
1505 * p2p_prepare_channel - Select operating channel for GO Negotiation or P2PS PD
1506 * @p2p: P2P module context from p2p_init()
1507 * @dev: Selected peer device
1508 * @force_freq: Forced frequency in MHz or 0 if not forced
1509 * @pref_freq: Preferred frequency in MHz or 0 if no preference
1510 * @go: Whether the local end will be forced to be GO
1511 * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1512 *
1513 * This function is used to do initial operating channel selection for GO
1514 * Negotiation prior to having received peer information or for P2PS PD
1515 * signalling. The selected channel may be further optimized in
1516 * p2p_reselect_channel() once the peer information is available.
1517 */
p2p_prepare_channel(struct p2p_data * p2p,struct p2p_device * dev,unsigned int force_freq,unsigned int pref_freq,int go)1518 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1519 unsigned int force_freq, unsigned int pref_freq, int go)
1520 {
1521 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1522 force_freq, pref_freq, go);
1523 if (force_freq || pref_freq) {
1524 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1525 0)
1526 return -1;
1527 } else {
1528 p2p_prepare_channel_best(p2p);
1529 }
1530 p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1531 if (go)
1532 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1533 else if (!force_freq)
1534 p2p_channels_union_inplace(&p2p->channels,
1535 &p2p->cfg->cli_channels);
1536 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1537
1538 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1539 p2p->op_reg_class, p2p->op_channel,
1540 force_freq ? " (forced)" : "");
1541
1542 if (force_freq)
1543 dev->flags |= P2P_DEV_FORCE_FREQ;
1544 else
1545 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1546
1547 return 0;
1548 }
1549
1550
p2p_set_dev_persistent(struct p2p_device * dev,int persistent_group)1551 static void p2p_set_dev_persistent(struct p2p_device *dev,
1552 int persistent_group)
1553 {
1554 switch (persistent_group) {
1555 case 0:
1556 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1557 P2P_DEV_PREFER_PERSISTENT_RECONN);
1558 break;
1559 case 1:
1560 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1561 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1562 break;
1563 case 2:
1564 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1565 P2P_DEV_PREFER_PERSISTENT_RECONN;
1566 break;
1567 }
1568 }
1569
1570
p2p_connect(struct p2p_data * p2p,const u8 * peer_addr,enum p2p_wps_method wps_method,int go_intent,const u8 * own_interface_addr,unsigned int force_freq,int persistent_group,const u8 * force_ssid,size_t force_ssid_len,int pd_before_go_neg,unsigned int pref_freq,u16 oob_pw_id)1571 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1572 enum p2p_wps_method wps_method,
1573 int go_intent, const u8 *own_interface_addr,
1574 unsigned int force_freq, int persistent_group,
1575 const u8 *force_ssid, size_t force_ssid_len,
1576 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1577 {
1578 struct p2p_device *dev;
1579
1580 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1581 " GO Intent=%d Intended Interface Address=" MACSTR
1582 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1583 "oob_pw_id=%u allow_6ghz=%d",
1584 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1585 wps_method, persistent_group, pd_before_go_neg, oob_pw_id,
1586 p2p->allow_6ghz);
1587
1588 dev = p2p_get_device(p2p, peer_addr);
1589 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1590 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1591 MAC2STR(peer_addr));
1592 return -1;
1593 }
1594
1595 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1596 go_intent == 15) < 0)
1597 return -1;
1598
1599 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1600 if (!(dev->info.dev_capab &
1601 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1602 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1603 " that is in a group and is not discoverable",
1604 MAC2STR(peer_addr));
1605 return -1;
1606 }
1607 if (dev->oper_freq <= 0) {
1608 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1609 " with incomplete information",
1610 MAC2STR(peer_addr));
1611 return -1;
1612 }
1613
1614 /*
1615 * First, try to connect directly. If the peer does not
1616 * acknowledge frames, assume it is sleeping and use device
1617 * discoverability via the GO at that point.
1618 */
1619 }
1620
1621 p2p->ssid_set = 0;
1622 if (force_ssid) {
1623 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1624 force_ssid, force_ssid_len);
1625 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1626 p2p->ssid_len = force_ssid_len;
1627 p2p->ssid_set = 1;
1628 }
1629
1630 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1631 dev->flags &= ~P2P_DEV_USER_REJECTED;
1632 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1633 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1634 if (pd_before_go_neg)
1635 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1636 else {
1637 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1638 /*
1639 * Assign dialog token and tie breaker here to use the same
1640 * values in each retry within the same GO Negotiation exchange.
1641 */
1642 dev->dialog_token++;
1643 if (dev->dialog_token == 0)
1644 dev->dialog_token = 1;
1645 dev->tie_breaker = p2p->next_tie_breaker;
1646 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1647 }
1648 dev->connect_reqs = 0;
1649 dev->go_neg_req_sent = 0;
1650 dev->go_state = UNKNOWN_GO;
1651 p2p_set_dev_persistent(dev, persistent_group);
1652 p2p->go_intent = go_intent;
1653 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1654
1655 if (p2p->state != P2P_IDLE)
1656 p2p_stop_find(p2p);
1657
1658 dev->wps_method = wps_method;
1659 dev->oob_pw_id = oob_pw_id;
1660 dev->status = P2P_SC_SUCCESS;
1661
1662 if (p2p->p2p_scan_running) {
1663 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1664 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1665 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1666 return 0;
1667 }
1668
1669 return p2p_connect_send(p2p, dev);
1670 }
1671
1672
p2p_authorize(struct p2p_data * p2p,const u8 * peer_addr,enum p2p_wps_method wps_method,int go_intent,const u8 * own_interface_addr,unsigned int force_freq,int persistent_group,const u8 * force_ssid,size_t force_ssid_len,unsigned int pref_freq,u16 oob_pw_id)1673 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1674 enum p2p_wps_method wps_method,
1675 int go_intent, const u8 *own_interface_addr,
1676 unsigned int force_freq, int persistent_group,
1677 const u8 *force_ssid, size_t force_ssid_len,
1678 unsigned int pref_freq, u16 oob_pw_id)
1679 {
1680 struct p2p_device *dev;
1681
1682 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1683 " GO Intent=%d Intended Interface Address=" MACSTR
1684 " wps_method=%d persistent_group=%d oob_pw_id=%u allow_6ghz=%d",
1685 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1686 wps_method, persistent_group, oob_pw_id, p2p->allow_6ghz);
1687
1688 dev = p2p_get_device(p2p, peer_addr);
1689 if (dev == NULL) {
1690 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1691 MAC2STR(peer_addr));
1692 return -1;
1693 }
1694
1695 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1696 15) < 0)
1697 return -1;
1698
1699 p2p->ssid_set = 0;
1700 if (force_ssid) {
1701 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1702 force_ssid, force_ssid_len);
1703 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1704 p2p->ssid_len = force_ssid_len;
1705 p2p->ssid_set = 1;
1706 }
1707
1708 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1709 dev->flags &= ~P2P_DEV_USER_REJECTED;
1710 dev->go_neg_req_sent = 0;
1711 dev->go_state = UNKNOWN_GO;
1712 p2p_set_dev_persistent(dev, persistent_group);
1713 p2p->go_intent = go_intent;
1714 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1715
1716 dev->wps_method = wps_method;
1717 dev->oob_pw_id = oob_pw_id;
1718 dev->status = P2P_SC_SUCCESS;
1719
1720 return 0;
1721 }
1722
1723
p2p_add_dev_info(struct p2p_data * p2p,const u8 * addr,struct p2p_device * dev,struct p2p_message * msg)1724 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1725 struct p2p_device *dev, struct p2p_message *msg)
1726 {
1727 os_get_reltime(&dev->last_seen);
1728
1729 p2p_copy_wps_info(p2p, dev, 0, msg);
1730
1731 if (msg->listen_channel) {
1732 int freq;
1733 freq = p2p_channel_to_freq(msg->listen_channel[3],
1734 msg->listen_channel[4]);
1735 if (freq < 0) {
1736 p2p_dbg(p2p, "Unknown peer Listen channel: "
1737 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1738 msg->listen_channel[0],
1739 msg->listen_channel[1],
1740 msg->listen_channel[2],
1741 msg->listen_channel[3],
1742 msg->listen_channel[4]);
1743 } else {
1744 p2p_dbg(p2p, "Update peer " MACSTR
1745 " Listen channel: %u -> %u MHz",
1746 MAC2STR(dev->info.p2p_device_addr),
1747 dev->listen_freq, freq);
1748 dev->listen_freq = freq;
1749 }
1750 }
1751
1752 if (msg->wfd_subelems) {
1753 wpabuf_free(dev->info.wfd_subelems);
1754 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1755 }
1756
1757 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1758 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1759 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1760 } else {
1761 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1762 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1763 "listen_freq=%d",
1764 MAC2STR(dev->info.p2p_device_addr),
1765 dev->info.dev_capab, dev->info.group_capab,
1766 dev->info.device_name, dev->listen_freq);
1767 }
1768
1769 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1770
1771 if (dev->flags & P2P_DEV_USER_REJECTED) {
1772 p2p_dbg(p2p, "Do not report rejected device");
1773 return;
1774 }
1775
1776 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1777 !(dev->flags & P2P_DEV_REPORTED_ONCE));
1778 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1779 }
1780
1781
p2p_build_ssid(struct p2p_data * p2p,u8 * ssid,size_t * ssid_len)1782 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1783 {
1784 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1785 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1786 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1787 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1788 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1789 }
1790
1791
p2p_go_params(struct p2p_data * p2p,struct p2p_go_neg_results * params)1792 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1793 {
1794 if (p2p->ssid_set) {
1795 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len);
1796 params->ssid_len = p2p->ssid_len;
1797 } else {
1798 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len);
1799 }
1800 p2p->ssid_set = 0;
1801
1802 if (p2p->passphrase_set) {
1803 os_memcpy(params->passphrase, p2p->passphrase, os_strlen(p2p->passphrase));
1804 } else {
1805 p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1806 }
1807 p2p->passphrase_set = 0;
1808 return 0;
1809 }
1810
1811
p2p_go_complete(struct p2p_data * p2p,struct p2p_device * peer)1812 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1813 {
1814 struct p2p_go_neg_results res;
1815 int go = peer->go_state == LOCAL_GO;
1816 struct p2p_channels intersection;
1817
1818 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1819 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1820
1821 os_memset(&res, 0, sizeof(res));
1822 res.role_go = go;
1823 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1824 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1825 res.wps_method = peer->wps_method;
1826 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1827 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1828 res.persistent_group = 2;
1829 else
1830 res.persistent_group = 1;
1831 }
1832
1833 if (go) {
1834 /* Setup AP mode for WPS provisioning */
1835 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1836 p2p->op_channel);
1837 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1838 res.ssid_len = p2p->ssid_len;
1839 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1840 } else {
1841 res.freq = peer->oper_freq;
1842 if (p2p->ssid_len) {
1843 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1844 res.ssid_len = p2p->ssid_len;
1845 }
1846 }
1847
1848 p2p_channels_dump(p2p, "own channels", &p2p->channels);
1849 p2p_channels_dump(p2p, "peer channels", &peer->channels);
1850 p2p_channels_intersect(&p2p->channels, &peer->channels,
1851 &intersection);
1852 if (go) {
1853 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1854 p2p_channels_dump(p2p, "intersection after no-GO removal",
1855 &intersection);
1856 }
1857
1858 p2p_channels_to_freqs(&intersection, res.freq_list,
1859 P2P_MAX_CHANNELS);
1860
1861 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1862
1863 p2p_clear_timeout(p2p);
1864 p2p->ssid_set = 0;
1865 peer->go_neg_req_sent = 0;
1866 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1867 peer->wps_method = WPS_NOT_READY;
1868 peer->oob_pw_id = 0;
1869 wpabuf_free(peer->go_neg_conf);
1870 peer->go_neg_conf = NULL;
1871
1872 p2p_set_state(p2p, P2P_PROVISIONING);
1873 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1874 }
1875
1876
p2p_rx_p2p_action(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len,int rx_freq)1877 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1878 const u8 *data, size_t len, int rx_freq)
1879 {
1880 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1881 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1882
1883 if (len < 1)
1884 return;
1885
1886 switch (data[0]) {
1887 case P2P_GO_NEG_REQ:
1888 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1889 break;
1890 case P2P_GO_NEG_RESP:
1891 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1892 break;
1893 case P2P_GO_NEG_CONF:
1894 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1895 break;
1896 case P2P_INVITATION_REQ:
1897 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1898 rx_freq);
1899 break;
1900 case P2P_INVITATION_RESP:
1901 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1902 break;
1903 case P2P_PROV_DISC_REQ:
1904 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1905 break;
1906 case P2P_PROV_DISC_RESP:
1907 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1908 break;
1909 case P2P_DEV_DISC_REQ:
1910 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1911 break;
1912 case P2P_DEV_DISC_RESP:
1913 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1914 break;
1915 default:
1916 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1917 data[0]);
1918 break;
1919 }
1920 }
1921
1922
p2p_rx_action_public(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * bssid,const u8 * data,size_t len,int freq)1923 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1924 const u8 *sa, const u8 *bssid, const u8 *data,
1925 size_t len, int freq)
1926 {
1927 if (len < 1)
1928 return;
1929
1930 switch (data[0]) {
1931 case WLAN_PA_VENDOR_SPECIFIC:
1932 data++;
1933 len--;
1934 if (len < 4)
1935 return;
1936 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1937 return;
1938
1939 data += 4;
1940 len -= 4;
1941
1942 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1943 break;
1944 case WLAN_PA_GAS_INITIAL_REQ:
1945 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1946 break;
1947 case WLAN_PA_GAS_INITIAL_RESP:
1948 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1949 break;
1950 case WLAN_PA_GAS_COMEBACK_REQ:
1951 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1952 break;
1953 case WLAN_PA_GAS_COMEBACK_RESP:
1954 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1955 break;
1956 }
1957 }
1958
1959
p2p_rx_action(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * bssid,u8 category,const u8 * data,size_t len,int freq)1960 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1961 const u8 *bssid, u8 category,
1962 const u8 *data, size_t len, int freq)
1963 {
1964 if (category == WLAN_ACTION_PUBLIC) {
1965 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1966 return;
1967 }
1968
1969 if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1970 return;
1971
1972 if (len < 4)
1973 return;
1974
1975 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1976 return;
1977 data += 4;
1978 len -= 4;
1979
1980 /* P2P action frame */
1981 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1982 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1983
1984 if (len < 1)
1985 return;
1986 switch (data[0]) {
1987 case P2P_NOA:
1988 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1989 /* TODO */
1990 break;
1991 case P2P_PRESENCE_REQ:
1992 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1993 break;
1994 case P2P_PRESENCE_RESP:
1995 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1996 break;
1997 case P2P_GO_DISC_REQ:
1998 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1999 break;
2000 default:
2001 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
2002 break;
2003 }
2004 }
2005
2006
p2p_go_neg_start(void * eloop_ctx,void * timeout_ctx)2007 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
2008 {
2009 struct p2p_data *p2p = eloop_ctx;
2010 if (p2p->go_neg_peer == NULL)
2011 return;
2012 if (p2p->pending_listen_freq) {
2013 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
2014 p2p->pending_listen_freq = 0;
2015 }
2016 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
2017 p2p->go_neg_peer->status = P2P_SC_SUCCESS;
2018 /*
2019 * Set new timeout to make sure a previously set one does not expire
2020 * too quickly while waiting for the GO Negotiation to complete.
2021 */
2022 p2p_set_timeout(p2p, 0, 500000);
2023 p2p_connect_send(p2p, p2p->go_neg_peer);
2024 }
2025
2026
p2p_invite_start(void * eloop_ctx,void * timeout_ctx)2027 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
2028 {
2029 struct p2p_data *p2p = eloop_ctx;
2030 if (p2p->invite_peer == NULL)
2031 return;
2032 if (p2p->pending_listen_freq) {
2033 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
2034 p2p->pending_listen_freq = 0;
2035 }
2036 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
2037 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
2038 p2p->invite_dev_pw_id);
2039 }
2040
2041
p2p_add_dev_from_probe_req(struct p2p_data * p2p,const u8 * addr,const u8 * ie,size_t ie_len)2042 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
2043 const u8 *ie, size_t ie_len)
2044 {
2045 struct p2p_message msg;
2046 struct p2p_device *dev;
2047
2048 os_memset(&msg, 0, sizeof(msg));
2049 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
2050 {
2051 p2p_parse_free(&msg);
2052 return; /* not a P2P probe */
2053 }
2054
2055 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
2056 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
2057 != 0) {
2058 /* The Probe Request is not part of P2P Device Discovery. It is
2059 * not known whether the source address of the frame is the P2P
2060 * Device Address or P2P Interface Address. Do not add a new
2061 * peer entry based on this frames.
2062 */
2063 p2p_parse_free(&msg);
2064 return;
2065 }
2066
2067 dev = p2p_get_device(p2p, addr);
2068 if (dev) {
2069 if (msg.listen_channel) {
2070 int freq;
2071
2072 if (dev->country[0] == 0)
2073 os_memcpy(dev->country, msg.listen_channel, 3);
2074
2075 freq = p2p_channel_to_freq(msg.listen_channel[3],
2076 msg.listen_channel[4]);
2077
2078 if (freq > 0 && dev->listen_freq != freq) {
2079 p2p_dbg(p2p,
2080 "Updated peer " MACSTR " Listen channel (Probe Request): %d -> %d MHz",
2081 MAC2STR(addr), dev->listen_freq, freq);
2082 dev->listen_freq = freq;
2083 }
2084 }
2085
2086 os_get_reltime(&dev->last_seen);
2087 p2p_parse_free(&msg);
2088 return; /* already known */
2089 }
2090
2091 dev = p2p_create_device(p2p, addr);
2092 if (dev == NULL) {
2093 p2p_parse_free(&msg);
2094 return;
2095 }
2096
2097 os_get_reltime(&dev->last_seen);
2098 dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
2099
2100 if (msg.listen_channel) {
2101 os_memcpy(dev->country, msg.listen_channel, 3);
2102 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
2103 msg.listen_channel[4]);
2104 }
2105
2106 p2p_copy_wps_info(p2p, dev, 1, &msg);
2107
2108 if (msg.wfd_subelems) {
2109 wpabuf_free(dev->info.wfd_subelems);
2110 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
2111 }
2112
2113 p2p_parse_free(&msg);
2114
2115 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
2116 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
2117 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
2118 dev->info.group_capab, dev->info.device_name,
2119 dev->listen_freq);
2120 }
2121
2122
p2p_add_dev_from_go_neg_req(struct p2p_data * p2p,const u8 * addr,struct p2p_message * msg)2123 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
2124 const u8 *addr,
2125 struct p2p_message *msg)
2126 {
2127 struct p2p_device *dev;
2128
2129 dev = p2p_get_device(p2p, addr);
2130 if (dev) {
2131 os_get_reltime(&dev->last_seen);
2132 return dev; /* already known */
2133 }
2134
2135 dev = p2p_create_device(p2p, addr);
2136 if (dev == NULL)
2137 return NULL;
2138
2139 p2p_add_dev_info(p2p, addr, dev, msg);
2140
2141 return dev;
2142 }
2143
2144
dev_type_match(const u8 * dev_type,const u8 * req_dev_type)2145 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
2146 {
2147 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
2148 return 1;
2149 if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
2150 WPA_GET_BE32(&req_dev_type[2]) == 0 &&
2151 WPA_GET_BE16(&req_dev_type[6]) == 0)
2152 return 1; /* Category match with wildcard OUI/sub-category */
2153 return 0;
2154 }
2155
2156
dev_type_list_match(const u8 * dev_type,const u8 * req_dev_type[],size_t num_req_dev_type)2157 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
2158 size_t num_req_dev_type)
2159 {
2160 size_t i;
2161 for (i = 0; i < num_req_dev_type; i++) {
2162 if (dev_type_match(dev_type, req_dev_type[i]))
2163 return 1;
2164 }
2165 return 0;
2166 }
2167
2168
2169 /**
2170 * p2p_match_dev_type - Match local device type with requested type
2171 * @p2p: P2P module context from p2p_init()
2172 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
2173 * Returns: 1 on match, 0 on mismatch
2174 *
2175 * This function can be used to match the Requested Device Type attribute in
2176 * WPS IE with the local device types for deciding whether to reply to a Probe
2177 * Request frame.
2178 */
p2p_match_dev_type(struct p2p_data * p2p,struct wpabuf * wps)2179 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2180 {
2181 struct wps_parse_attr attr;
2182 size_t i;
2183
2184 if (wps_parse_msg(wps, &attr))
2185 return 1; /* assume no Requested Device Type attributes */
2186
2187 if (attr.num_req_dev_type == 0)
2188 return 1; /* no Requested Device Type attributes -> match */
2189
2190 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2191 attr.num_req_dev_type))
2192 return 1; /* Own Primary Device Type matches */
2193
2194 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2195 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2196 attr.req_dev_type,
2197 attr.num_req_dev_type))
2198 return 1; /* Own Secondary Device Type matches */
2199 }
2200
2201 /* No matching device type found */
2202 return 0;
2203 }
2204
2205
p2p_build_probe_resp_ies(struct p2p_data * p2p,const u8 * query_hash,u8 query_count)2206 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p,
2207 const u8 *query_hash,
2208 u8 query_count)
2209 {
2210 struct wpabuf *buf;
2211 u8 *len;
2212 int pw_id = -1;
2213 size_t extra = 0;
2214
2215 #ifdef CONFIG_WIFI_DISPLAY
2216 if (p2p->wfd_ie_probe_resp)
2217 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2218 #endif /* CONFIG_WIFI_DISPLAY */
2219
2220 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2221 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2222
2223 if (query_count)
2224 extra += MAX_SVC_ADV_IE_LEN;
2225
2226 buf = wpabuf_alloc(1000 + extra);
2227 if (buf == NULL)
2228 return NULL;
2229
2230 if (p2p->go_neg_peer) {
2231 /* Advertise immediate availability of WPS credential */
2232 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2233 }
2234
2235 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2236 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2237 wpabuf_free(buf);
2238 return NULL;
2239 }
2240
2241 #ifdef CONFIG_WIFI_DISPLAY
2242 if (p2p->wfd_ie_probe_resp)
2243 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2244 #endif /* CONFIG_WIFI_DISPLAY */
2245
2246 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2247 wpabuf_put_buf(buf,
2248 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2249
2250 /* P2P IE */
2251 len = p2p_buf_add_ie_hdr(buf);
2252 p2p_buf_add_capability(buf, p2p->dev_capab &
2253 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2254 if (p2p->ext_listen_interval)
2255 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2256 p2p->ext_listen_interval);
2257 p2p_buf_add_device_info(buf, p2p, NULL);
2258 p2p_buf_update_ie_hdr(buf, len);
2259
2260 if (query_count) {
2261 p2p_buf_add_service_instance(buf, p2p, query_count, query_hash,
2262 p2p->p2ps_adv_list);
2263 }
2264
2265 return buf;
2266 }
2267
p2p_build_probe_resp_buf(struct p2p_data * p2p,struct wpabuf * buf,struct wpabuf * ies,const u8 * addr,int rx_freq)2268 static int p2p_build_probe_resp_buf(struct p2p_data *p2p, struct wpabuf *buf,
2269 struct wpabuf *ies,
2270 const u8 *addr, int rx_freq)
2271 {
2272 struct ieee80211_mgmt *resp;
2273 u8 channel, op_class;
2274
2275 resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt,
2276 u.probe_resp.variable));
2277
2278 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2279 (WLAN_FC_STYPE_PROBE_RESP << 4));
2280 os_memcpy(resp->da, addr, ETH_ALEN);
2281 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2282 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2283 resp->u.probe_resp.beacon_int = host_to_le16(100);
2284 /* hardware or low-level driver will setup seq_ctrl and timestamp */
2285 resp->u.probe_resp.capab_info =
2286 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2287 WLAN_CAPABILITY_PRIVACY |
2288 WLAN_CAPABILITY_SHORT_SLOT_TIME);
2289
2290 wpabuf_put_u8(buf, WLAN_EID_SSID);
2291 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2292 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2293
2294 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2295 wpabuf_put_u8(buf, 8);
2296 wpabuf_put_u8(buf, (60 / 5) | 0x80);
2297 wpabuf_put_u8(buf, 90 / 5);
2298 wpabuf_put_u8(buf, (120 / 5) | 0x80);
2299 wpabuf_put_u8(buf, 180 / 5);
2300 wpabuf_put_u8(buf, (240 / 5) | 0x80);
2301 wpabuf_put_u8(buf, 360 / 5);
2302 wpabuf_put_u8(buf, 480 / 5);
2303 wpabuf_put_u8(buf, 540 / 5);
2304
2305 if (!rx_freq) {
2306 channel = p2p->cfg->channel;
2307 } else if (p2p_freq_to_channel(rx_freq, &op_class, &channel)) {
2308 p2p_err(p2p, "Failed to convert freq to channel");
2309 return -1;
2310 }
2311
2312 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2313 wpabuf_put_u8(buf, 1);
2314 wpabuf_put_u8(buf, channel);
2315
2316 wpabuf_put_buf(buf, ies);
2317
2318 return 0;
2319 }
2320
p2p_service_find_asp(struct p2p_data * p2p,const u8 * hash)2321 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash)
2322 {
2323 struct p2ps_advertisement *adv_data;
2324 int any_wfa;
2325
2326 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list);
2327
2328 /* Wildcard org.wi-fi.wfds matches any WFA spec defined service */
2329 any_wfa = os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0;
2330
2331 adv_data = p2p->p2ps_adv_list;
2332 while (adv_data) {
2333 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0)
2334 return 1; /* exact hash match */
2335 if (any_wfa &&
2336 os_strncmp(adv_data->svc_name, P2PS_WILD_HASH_STR,
2337 os_strlen(P2PS_WILD_HASH_STR)) == 0)
2338 return 1; /* WFA service match */
2339 adv_data = adv_data->next;
2340 }
2341
2342 return 0;
2343 }
2344
2345
2346 static enum p2p_probe_req_status
p2p_reply_probe(struct p2p_data * p2p,const u8 * addr,const u8 * dst,const u8 * bssid,const u8 * ie,size_t ie_len,unsigned int rx_freq)2347 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2348 const u8 *bssid, const u8 *ie, size_t ie_len,
2349 unsigned int rx_freq)
2350 {
2351 struct ieee802_11_elems elems;
2352 struct wpabuf *buf;
2353 struct p2p_message msg;
2354 struct wpabuf *ies;
2355
2356 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2357 ParseFailed) {
2358 /* Ignore invalid Probe Request frames */
2359 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2360 return P2P_PREQ_MALFORMED;
2361 }
2362
2363 if (elems.p2p == NULL) {
2364 /* not a P2P probe - ignore it */
2365 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2366 return P2P_PREQ_NOT_P2P;
2367 }
2368
2369 if (dst && !is_broadcast_ether_addr(dst) &&
2370 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2371 /* Not sent to the broadcast address or our P2P Device Address
2372 */
2373 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2374 MAC2STR(dst));
2375 return P2P_PREQ_NOT_PROCESSED;
2376 }
2377
2378 if (bssid && !is_broadcast_ether_addr(bssid)) {
2379 /* Not sent to the Wildcard BSSID */
2380 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2381 MAC2STR(bssid));
2382 return P2P_PREQ_NOT_PROCESSED;
2383 }
2384
2385 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2386 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2387 0) {
2388 /* not using P2P Wildcard SSID - ignore */
2389 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2390 return P2P_PREQ_NOT_PROCESSED;
2391 }
2392
2393 if (supp_rates_11b_only(&elems)) {
2394 /* Indicates support for 11b rates only */
2395 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2396 return P2P_PREQ_NOT_P2P;
2397 }
2398
2399 os_memset(&msg, 0, sizeof(msg));
2400 if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2401 /* Could not parse P2P attributes */
2402 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2403 return P2P_PREQ_NOT_P2P;
2404 }
2405
2406 if (msg.service_hash && msg.service_hash_count) {
2407 const u8 *hash = msg.service_hash;
2408 u8 i;
2409 int p2ps_svc_found = 0;
2410
2411 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",
2412 p2p->in_listen, p2p->drv_in_listen, rx_freq,
2413 p2p->cfg->channel, p2p->pending_listen_freq);
2414
2415 if (!p2p->in_listen && !p2p->drv_in_listen &&
2416 p2p->pending_listen_freq && rx_freq &&
2417 rx_freq != p2p->pending_listen_freq) {
2418 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",
2419 rx_freq, p2p->pending_listen_freq);
2420 p2p_parse_free(&msg);
2421 return P2P_PREQ_NOT_LISTEN;
2422 }
2423
2424 for (i = 0; i < msg.service_hash_count; i++) {
2425 if (p2p_service_find_asp(p2p, hash)) {
2426 p2p_dbg(p2p, "Service Hash match found: "
2427 MACSTR, MAC2STR(hash));
2428 p2ps_svc_found = 1;
2429 break;
2430 }
2431 hash += P2PS_HASH_LEN;
2432 }
2433
2434 /* Probed hash unknown */
2435 if (!p2ps_svc_found) {
2436 p2p_dbg(p2p, "No Service Hash match found");
2437 p2p_parse_free(&msg);
2438 return P2P_PREQ_NOT_PROCESSED;
2439 }
2440 } else {
2441 /* This is not a P2PS Probe Request */
2442 p2p_dbg(p2p, "No P2PS Hash in Probe Request");
2443
2444 if (!p2p->in_listen || !p2p->drv_in_listen) {
2445 /* not in Listen state - ignore Probe Request */
2446 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2447 p2p->in_listen, p2p->drv_in_listen);
2448 p2p_parse_free(&msg);
2449 return P2P_PREQ_NOT_LISTEN;
2450 }
2451 }
2452
2453 if (msg.device_id &&
2454 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2455 /* Device ID did not match */
2456 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2457 MAC2STR(msg.device_id));
2458 p2p_parse_free(&msg);
2459 return P2P_PREQ_NOT_PROCESSED;
2460 }
2461
2462 /* Check Requested Device Type match */
2463 if (msg.wps_attributes &&
2464 !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2465 /* No match with Requested Device Type */
2466 p2p_dbg(p2p, "Probe Req requested Device Type did not match - ignore it");
2467 p2p_parse_free(&msg);
2468 return P2P_PREQ_NOT_PROCESSED;
2469 }
2470
2471 if (!p2p->cfg->send_probe_resp) {
2472 /* Response generated elsewhere */
2473 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2474 p2p_parse_free(&msg);
2475 return P2P_PREQ_NOT_PROCESSED;
2476 }
2477
2478 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2479
2480 /*
2481 * We do not really have a specific BSS that this frame is advertising,
2482 * so build a frame that has some information in valid format. This is
2483 * really only used for discovery purposes, not to learn exact BSS
2484 * parameters.
2485 */
2486 ies = p2p_build_probe_resp_ies(p2p, msg.service_hash,
2487 msg.service_hash_count);
2488 p2p_parse_free(&msg);
2489 if (ies == NULL)
2490 return P2P_PREQ_NOT_PROCESSED;
2491
2492 buf = wpabuf_alloc(200 + wpabuf_len(ies));
2493 if (buf == NULL) {
2494 wpabuf_free(ies);
2495 return P2P_PREQ_NOT_PROCESSED;
2496 }
2497
2498 if (p2p_build_probe_resp_buf(p2p, buf, ies, addr, rx_freq)) {
2499 wpabuf_free(ies);
2500 wpabuf_free(buf);
2501 return P2P_PREQ_NOT_PROCESSED;
2502 }
2503
2504 wpabuf_free(ies);
2505
2506 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf, rx_freq);
2507
2508 wpabuf_free(buf);
2509
2510 return P2P_PREQ_PROCESSED;
2511 }
2512
2513
2514 enum p2p_probe_req_status
p2p_probe_req_rx(struct p2p_data * p2p,const u8 * addr,const u8 * dst,const u8 * bssid,const u8 * ie,size_t ie_len,unsigned int rx_freq,int p2p_lo_started)2515 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2516 const u8 *bssid, const u8 *ie, size_t ie_len,
2517 unsigned int rx_freq, int p2p_lo_started)
2518 {
2519 enum p2p_probe_req_status res;
2520
2521 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2522
2523 if (p2p_lo_started) {
2524 p2p_dbg(p2p,
2525 "Probe Response is offloaded, do not reply Probe Request");
2526 return P2P_PREQ_PROCESSED;
2527 }
2528
2529 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq);
2530 if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED)
2531 return res;
2532
2533 /*
2534 * Activate a pending GO Negotiation/Invite flow if a received Probe
2535 * Request frame is from an expected peer. Some devices may share the
2536 * same address for P2P and non-P2P STA running simultaneously. The
2537 * P2P_PREQ_PROCESSED and P2P_PREQ_NOT_PROCESSED p2p_reply_probe()
2538 * return values verified above ensure we are handling a Probe Request
2539 * frame from a P2P peer.
2540 */
2541 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2542 p2p->go_neg_peer &&
2543 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2544 == 0 &&
2545 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2546 /* Received a Probe Request from GO Negotiation peer */
2547 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2548 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2549 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2550 return res;
2551 }
2552
2553 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2554 p2p->invite_peer &&
2555 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2556 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2557 == 0) {
2558 /* Received a Probe Request from Invite peer */
2559 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2560 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2561 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2562 return res;
2563 }
2564
2565 return res;
2566 }
2567
2568
p2p_assoc_req_ie_wlan_ap(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,struct wpabuf * p2p_ie)2569 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2570 u8 *buf, size_t len, struct wpabuf *p2p_ie)
2571 {
2572 struct wpabuf *tmp;
2573 u8 *lpos;
2574 size_t tmplen;
2575 int res;
2576 u8 group_capab;
2577 struct p2p_message msg;
2578
2579 if (p2p_ie == NULL)
2580 return 0; /* WLAN AP is not a P2P manager */
2581
2582 os_memset(&msg, 0, sizeof(msg));
2583 if (p2p_parse_p2p_ie(p2p_ie, &msg) < 0)
2584 return 0;
2585
2586 p2p_dbg(p2p, "BSS P2P manageability %s",
2587 msg.manageability ? "enabled" : "disabled");
2588
2589 if (!msg.manageability)
2590 return 0;
2591
2592 /*
2593 * (Re)Association Request - P2P IE
2594 * P2P Capability attribute (shall be present)
2595 * P2P Interface attribute (present if concurrent device and
2596 * P2P Management is enabled)
2597 */
2598 tmp = wpabuf_alloc(200);
2599 if (tmp == NULL)
2600 return -1;
2601
2602 lpos = p2p_buf_add_ie_hdr(tmp);
2603 group_capab = 0;
2604 if (p2p->num_groups > 0) {
2605 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2606 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2607 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2608 p2p->cross_connect)
2609 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2610 }
2611 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2612 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2613 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2614 p2p_buf_add_p2p_interface(tmp, p2p);
2615 p2p_buf_update_ie_hdr(tmp, lpos);
2616
2617 tmplen = wpabuf_len(tmp);
2618 if (tmplen > len)
2619 res = -1;
2620 else {
2621 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2622 res = tmplen;
2623 }
2624 wpabuf_free(tmp);
2625
2626 return res;
2627 }
2628
2629
p2p_assoc_req_ie(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,int p2p_group,struct wpabuf * p2p_ie)2630 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2631 size_t len, int p2p_group, struct wpabuf *p2p_ie)
2632 {
2633 struct wpabuf *tmp;
2634 u8 *lpos;
2635 struct p2p_device *peer;
2636 size_t tmplen;
2637 int res;
2638 size_t extra = 0;
2639
2640 if (!p2p_group)
2641 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2642
2643 #ifdef CONFIG_WIFI_DISPLAY
2644 if (p2p->wfd_ie_assoc_req)
2645 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2646 #endif /* CONFIG_WIFI_DISPLAY */
2647
2648 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2649 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2650
2651 /*
2652 * (Re)Association Request - P2P IE
2653 * P2P Capability attribute (shall be present)
2654 * Extended Listen Timing (may be present)
2655 * P2P Device Info attribute (shall be present)
2656 */
2657 tmp = wpabuf_alloc(200 + extra);
2658 if (tmp == NULL)
2659 return -1;
2660
2661 #ifdef CONFIG_WIFI_DISPLAY
2662 if (p2p->wfd_ie_assoc_req)
2663 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2664 #endif /* CONFIG_WIFI_DISPLAY */
2665
2666 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2667 wpabuf_put_buf(tmp,
2668 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2669
2670 peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2671
2672 lpos = p2p_buf_add_ie_hdr(tmp);
2673 p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2674 if (p2p->ext_listen_interval)
2675 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2676 p2p->ext_listen_interval);
2677 p2p_buf_add_device_info(tmp, p2p, peer);
2678 p2p_buf_update_ie_hdr(tmp, lpos);
2679
2680 tmplen = wpabuf_len(tmp);
2681 if (tmplen > len)
2682 res = -1;
2683 else {
2684 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2685 res = tmplen;
2686 }
2687 wpabuf_free(tmp);
2688
2689 return res;
2690 }
2691
2692
p2p_scan_result_text(const u8 * ies,size_t ies_len,char * buf,char * end)2693 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2694 {
2695 struct wpabuf *p2p_ie;
2696 int ret;
2697
2698 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2699 if (p2p_ie == NULL)
2700 return 0;
2701
2702 ret = p2p_attr_text(p2p_ie, buf, end);
2703 wpabuf_free(p2p_ie);
2704 return ret;
2705 }
2706
2707
2708 struct p2ps_advertisement *
p2p_service_p2ps_id(struct p2p_data * p2p,u32 adv_id)2709 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id)
2710 {
2711 struct p2ps_advertisement *adv_data;
2712
2713 if (!p2p)
2714 return NULL;
2715
2716 adv_data = p2p->p2ps_adv_list;
2717 while (adv_data) {
2718 if (adv_data->id == adv_id)
2719 return adv_data;
2720 adv_data = adv_data->next;
2721 }
2722
2723 return NULL;
2724 }
2725
2726
p2p_service_del_asp(struct p2p_data * p2p,u32 adv_id)2727 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id)
2728 {
2729 struct p2ps_advertisement *adv_data;
2730 struct p2ps_advertisement **prior;
2731
2732 if (!p2p)
2733 return -1;
2734
2735 adv_data = p2p->p2ps_adv_list;
2736 prior = &p2p->p2ps_adv_list;
2737 while (adv_data) {
2738 if (adv_data->id == adv_id) {
2739 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id);
2740 *prior = adv_data->next;
2741 os_free(adv_data);
2742 return 0;
2743 }
2744 prior = &adv_data->next;
2745 adv_data = adv_data->next;
2746 }
2747
2748 return -1;
2749 }
2750
2751
p2p_service_add_asp(struct p2p_data * p2p,int auto_accept,u32 adv_id,const char * adv_str,u8 svc_state,u16 config_methods,const char * svc_info,const u8 * cpt_priority)2752 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id,
2753 const char *adv_str, u8 svc_state, u16 config_methods,
2754 const char *svc_info, const u8 *cpt_priority)
2755 {
2756 struct p2ps_advertisement *adv_data, *tmp, **prev;
2757 u8 buf[P2PS_HASH_LEN];
2758 size_t adv_data_len, adv_len, info_len = 0;
2759 int i;
2760
2761 if (!p2p || !adv_str || !adv_str[0] || !cpt_priority)
2762 return -1;
2763
2764 if (!(config_methods & p2p->cfg->config_methods)) {
2765 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x",
2766 config_methods, p2p->cfg->config_methods);
2767 return -1;
2768 }
2769
2770 if (!p2ps_gen_hash(p2p, adv_str, buf))
2771 return -1;
2772
2773 if (svc_info)
2774 info_len = os_strlen(svc_info);
2775 adv_len = os_strlen(adv_str);
2776 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 +
2777 info_len + 1;
2778
2779 adv_data = os_zalloc(adv_data_len);
2780 if (!adv_data)
2781 return -1;
2782
2783 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN);
2784 adv_data->id = adv_id;
2785 adv_data->state = svc_state;
2786 adv_data->config_methods = config_methods & p2p->cfg->config_methods;
2787 adv_data->auto_accept = (u8) auto_accept;
2788 os_memcpy(adv_data->svc_name, adv_str, adv_len);
2789
2790 for (i = 0; cpt_priority[i] && i < P2PS_FEATURE_CAPAB_CPT_MAX; i++) {
2791 adv_data->cpt_priority[i] = cpt_priority[i];
2792 adv_data->cpt_mask |= cpt_priority[i];
2793 }
2794
2795 if (svc_info && info_len) {
2796 adv_data->svc_info = &adv_data->svc_name[adv_len + 1];
2797 os_memcpy(adv_data->svc_info, svc_info, info_len);
2798 }
2799
2800 /*
2801 * Group Advertisements by service string. They do not need to be
2802 * sorted, but groups allow easier Probe Response instance grouping
2803 */
2804 tmp = p2p->p2ps_adv_list;
2805 prev = &p2p->p2ps_adv_list;
2806 while (tmp) {
2807 if (tmp->id == adv_data->id) {
2808 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) {
2809 os_free(adv_data);
2810 return -1;
2811 }
2812 adv_data->next = tmp->next;
2813 *prev = adv_data;
2814 os_free(tmp);
2815 goto inserted;
2816 } else {
2817 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) {
2818 adv_data->next = tmp->next;
2819 tmp->next = adv_data;
2820 goto inserted;
2821 }
2822 }
2823 prev = &tmp->next;
2824 tmp = tmp->next;
2825 }
2826
2827 /* No svc_name match found */
2828 adv_data->next = p2p->p2ps_adv_list;
2829 p2p->p2ps_adv_list = adv_data;
2830
2831 inserted:
2832 p2p_dbg(p2p,
2833 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s' cpt_mask=0x%x",
2834 adv_id, adv_data->config_methods, svc_state, adv_str,
2835 adv_data->cpt_mask);
2836
2837 return 0;
2838 }
2839
2840
p2p_service_flush_asp(struct p2p_data * p2p)2841 void p2p_service_flush_asp(struct p2p_data *p2p)
2842 {
2843 struct p2ps_advertisement *adv, *prev;
2844
2845 if (!p2p)
2846 return;
2847
2848 adv = p2p->p2ps_adv_list;
2849 while (adv) {
2850 prev = adv;
2851 adv = adv->next;
2852 os_free(prev);
2853 }
2854
2855 p2p->p2ps_adv_list = NULL;
2856 p2ps_prov_free(p2p);
2857 p2p_dbg(p2p, "All ASP advertisements flushed");
2858 }
2859
2860
p2p_parse_dev_addr_in_p2p_ie(struct wpabuf * p2p_ie,u8 * dev_addr)2861 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2862 {
2863 struct p2p_message msg;
2864
2865 os_memset(&msg, 0, sizeof(msg));
2866 if (p2p_parse_p2p_ie(p2p_ie, &msg))
2867 return -1;
2868
2869 if (msg.p2p_device_addr) {
2870 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2871 return 0;
2872 } else if (msg.device_id) {
2873 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2874 return 0;
2875 }
2876 return -1;
2877 }
2878
2879
p2p_parse_dev_addr(const u8 * ies,size_t ies_len,u8 * dev_addr)2880 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2881 {
2882 struct wpabuf *p2p_ie;
2883 int ret;
2884
2885 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2886 P2P_IE_VENDOR_TYPE);
2887 if (p2p_ie == NULL)
2888 return -1;
2889 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2890 wpabuf_free(p2p_ie);
2891 return ret;
2892 }
2893
2894
p2p_clear_go_neg(struct p2p_data * p2p)2895 static void p2p_clear_go_neg(struct p2p_data *p2p)
2896 {
2897 p2p->go_neg_peer = NULL;
2898 p2p_clear_timeout(p2p);
2899 p2p_set_state(p2p, P2P_IDLE);
2900 }
2901
2902
p2p_wps_success_cb(struct p2p_data * p2p,const u8 * mac_addr)2903 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2904 {
2905 if (p2p->go_neg_peer == NULL) {
2906 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2907 return; /* No pending Group Formation */
2908 }
2909
2910 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2911 0) {
2912 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2913 MACSTR " (GO Negotiation peer " MACSTR ")",
2914 MAC2STR(mac_addr),
2915 MAC2STR(p2p->go_neg_peer->intended_addr));
2916 return; /* Ignore unexpected peer address */
2917 }
2918
2919 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2920 MAC2STR(mac_addr));
2921
2922 p2p_clear_go_neg(p2p);
2923 }
2924
2925
p2p_group_formation_failed(struct p2p_data * p2p)2926 void p2p_group_formation_failed(struct p2p_data *p2p)
2927 {
2928 if (p2p->go_neg_peer == NULL) {
2929 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2930 return; /* No pending Group Formation */
2931 }
2932
2933 p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2934 MAC2STR(p2p->go_neg_peer->intended_addr));
2935
2936 p2p_clear_go_neg(p2p);
2937 }
2938
2939
is_p2p_6ghz_disabled(struct p2p_data * p2p)2940 bool is_p2p_6ghz_disabled(struct p2p_data *p2p)
2941 {
2942 if (p2p)
2943 return p2p->cfg->p2p_6ghz_disable;
2944 return false;
2945 }
2946
2947
p2p_init(const struct p2p_config * cfg)2948 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2949 {
2950 struct p2p_data *p2p;
2951
2952 if (cfg->max_peers < 1 ||
2953 cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2954 return NULL;
2955
2956 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2957 if (p2p == NULL)
2958 return NULL;
2959 p2p->cfg = (struct p2p_config *) (p2p + 1);
2960 os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2961 if (cfg->dev_name)
2962 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2963 if (cfg->manufacturer)
2964 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2965 if (cfg->model_name)
2966 p2p->cfg->model_name = os_strdup(cfg->model_name);
2967 if (cfg->model_number)
2968 p2p->cfg->model_number = os_strdup(cfg->model_number);
2969 if (cfg->serial_number)
2970 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2971 if (cfg->pref_chan) {
2972 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2973 sizeof(struct p2p_channel));
2974 if (p2p->cfg->pref_chan) {
2975 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2976 cfg->num_pref_chan *
2977 sizeof(struct p2p_channel));
2978 } else
2979 p2p->cfg->num_pref_chan = 0;
2980 }
2981
2982 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);
2983
2984 p2p->min_disc_int = 1;
2985 p2p->max_disc_int = 3;
2986 p2p->max_disc_tu = -1;
2987
2988 if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2989 p2p->next_tie_breaker = 0;
2990 p2p->next_tie_breaker &= 0x01;
2991 if (cfg->sd_request)
2992 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2993 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2994 if (cfg->concurrent_operations)
2995 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2996 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2997
2998 dl_list_init(&p2p->devices);
2999
3000 p2p->go_timeout = 100;
3001 p2p->client_timeout = 20;
3002 p2p->num_p2p_sd_queries = 0;
3003
3004 p2p_dbg(p2p, "initialized");
3005 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
3006 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
3007
3008 return p2p;
3009 }
3010
3011
p2p_deinit(struct p2p_data * p2p)3012 void p2p_deinit(struct p2p_data *p2p)
3013 {
3014 #ifdef CONFIG_WIFI_DISPLAY
3015 wpabuf_free(p2p->wfd_ie_beacon);
3016 wpabuf_free(p2p->wfd_ie_probe_req);
3017 wpabuf_free(p2p->wfd_ie_probe_resp);
3018 wpabuf_free(p2p->wfd_ie_assoc_req);
3019 wpabuf_free(p2p->wfd_ie_invitation);
3020 wpabuf_free(p2p->wfd_ie_prov_disc_req);
3021 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
3022 wpabuf_free(p2p->wfd_ie_go_neg);
3023 wpabuf_free(p2p->wfd_dev_info);
3024 wpabuf_free(p2p->wfd_assoc_bssid);
3025 wpabuf_free(p2p->wfd_coupled_sink_info);
3026 wpabuf_free(p2p->wfd_r2_dev_info);
3027 #endif /* CONFIG_WIFI_DISPLAY */
3028
3029 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3030 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
3031 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
3032 p2p_flush(p2p);
3033 p2p_free_req_dev_types(p2p);
3034 os_free(p2p->cfg->dev_name);
3035 os_free(p2p->cfg->manufacturer);
3036 os_free(p2p->cfg->model_name);
3037 os_free(p2p->cfg->model_number);
3038 os_free(p2p->cfg->serial_number);
3039 os_free(p2p->cfg->pref_chan);
3040 os_free(p2p->groups);
3041 p2ps_prov_free(p2p);
3042 wpabuf_free(p2p->sd_resp);
3043 p2p_remove_wps_vendor_extensions(p2p);
3044 os_free(p2p->no_go_freq.range);
3045 p2p_service_flush_asp(p2p);
3046
3047 os_free(p2p);
3048 }
3049
3050
p2p_flush(struct p2p_data * p2p)3051 void p2p_flush(struct p2p_data *p2p)
3052 {
3053 struct p2p_device *dev, *prev;
3054
3055 p2p_ext_listen(p2p, 0, 0);
3056 p2p_stop_find(p2p);
3057 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
3058 list) {
3059 dl_list_del(&dev->list);
3060 p2p_device_free(p2p, dev);
3061 }
3062 p2p_free_sd_queries(p2p);
3063 p2p->ssid_set = 0;
3064 p2ps_prov_free(p2p);
3065 p2p_reset_pending_pd(p2p);
3066 p2p->override_pref_op_class = 0;
3067 p2p->override_pref_channel = 0;
3068 }
3069
3070
p2p_unauthorize(struct p2p_data * p2p,const u8 * addr)3071 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
3072 {
3073 struct p2p_device *dev;
3074
3075 dev = p2p_get_device(p2p, addr);
3076 if (dev == NULL)
3077 return -1;
3078
3079 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
3080
3081 if (p2p->go_neg_peer == dev) {
3082 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
3083 p2p->go_neg_peer = NULL;
3084 }
3085
3086 dev->wps_method = WPS_NOT_READY;
3087 dev->oob_pw_id = 0;
3088 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
3089 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
3090
3091 return 0;
3092 }
3093
3094
p2p_set_dev_name(struct p2p_data * p2p,const char * dev_name)3095 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
3096 {
3097 os_free(p2p->cfg->dev_name);
3098 if (dev_name) {
3099 p2p->cfg->dev_name = os_strdup(dev_name);
3100 if (p2p->cfg->dev_name == NULL)
3101 return -1;
3102 } else
3103 p2p->cfg->dev_name = NULL;
3104 return 0;
3105 }
3106
3107
p2p_set_manufacturer(struct p2p_data * p2p,const char * manufacturer)3108 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
3109 {
3110 os_free(p2p->cfg->manufacturer);
3111 p2p->cfg->manufacturer = NULL;
3112 if (manufacturer) {
3113 p2p->cfg->manufacturer = os_strdup(manufacturer);
3114 if (p2p->cfg->manufacturer == NULL)
3115 return -1;
3116 }
3117
3118 return 0;
3119 }
3120
3121
p2p_set_model_name(struct p2p_data * p2p,const char * model_name)3122 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
3123 {
3124 os_free(p2p->cfg->model_name);
3125 p2p->cfg->model_name = NULL;
3126 if (model_name) {
3127 p2p->cfg->model_name = os_strdup(model_name);
3128 if (p2p->cfg->model_name == NULL)
3129 return -1;
3130 }
3131
3132 return 0;
3133 }
3134
3135
p2p_set_model_number(struct p2p_data * p2p,const char * model_number)3136 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
3137 {
3138 os_free(p2p->cfg->model_number);
3139 p2p->cfg->model_number = NULL;
3140 if (model_number) {
3141 p2p->cfg->model_number = os_strdup(model_number);
3142 if (p2p->cfg->model_number == NULL)
3143 return -1;
3144 }
3145
3146 return 0;
3147 }
3148
3149
p2p_set_serial_number(struct p2p_data * p2p,const char * serial_number)3150 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
3151 {
3152 os_free(p2p->cfg->serial_number);
3153 p2p->cfg->serial_number = NULL;
3154 if (serial_number) {
3155 p2p->cfg->serial_number = os_strdup(serial_number);
3156 if (p2p->cfg->serial_number == NULL)
3157 return -1;
3158 }
3159
3160 return 0;
3161 }
3162
3163
p2p_set_config_methods(struct p2p_data * p2p,u16 config_methods)3164 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
3165 {
3166 p2p->cfg->config_methods = config_methods;
3167 }
3168
3169
p2p_set_uuid(struct p2p_data * p2p,const u8 * uuid)3170 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
3171 {
3172 os_memcpy(p2p->cfg->uuid, uuid, 16);
3173 }
3174
3175
p2p_set_pri_dev_type(struct p2p_data * p2p,const u8 * pri_dev_type)3176 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
3177 {
3178 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
3179 return 0;
3180 }
3181
3182
p2p_set_sec_dev_types(struct p2p_data * p2p,const u8 dev_types[][8],size_t num_dev_types)3183 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
3184 size_t num_dev_types)
3185 {
3186 if (num_dev_types > P2P_SEC_DEVICE_TYPES)
3187 num_dev_types = P2P_SEC_DEVICE_TYPES;
3188 p2p->cfg->num_sec_dev_types = num_dev_types;
3189 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
3190 return 0;
3191 }
3192
3193
p2p_remove_wps_vendor_extensions(struct p2p_data * p2p)3194 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
3195 {
3196 int i;
3197
3198 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3199 wpabuf_free(p2p->wps_vendor_ext[i]);
3200 p2p->wps_vendor_ext[i] = NULL;
3201 }
3202 }
3203
3204
p2p_add_wps_vendor_extension(struct p2p_data * p2p,const struct wpabuf * vendor_ext)3205 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
3206 const struct wpabuf *vendor_ext)
3207 {
3208 int i;
3209
3210 if (vendor_ext == NULL)
3211 return -1;
3212
3213 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3214 if (p2p->wps_vendor_ext[i] == NULL)
3215 break;
3216 }
3217 if (i >= P2P_MAX_WPS_VENDOR_EXT)
3218 return -1;
3219
3220 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
3221 if (p2p->wps_vendor_ext[i] == NULL)
3222 return -1;
3223
3224 return 0;
3225 }
3226
3227
p2p_set_country(struct p2p_data * p2p,const char * country)3228 int p2p_set_country(struct p2p_data *p2p, const char *country)
3229 {
3230 os_memcpy(p2p->cfg->country, country, 3);
3231 return 0;
3232 }
3233
3234
p2p_pre_find_operation(struct p2p_data * p2p,struct p2p_device * dev)3235 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
3236 {
3237 int res;
3238
3239 if (dev->sd_pending_bcast_queries == 0) {
3240 /* Initialize with total number of registered broadcast
3241 * SD queries. */
3242 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
3243 }
3244
3245 res = p2p_start_sd(p2p, dev);
3246 if (res == -2)
3247 return -2;
3248 if (res == 0)
3249 return 1;
3250
3251 if (dev->req_config_methods &&
3252 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
3253 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3254 MACSTR " (config methods 0x%x)",
3255 MAC2STR(dev->info.p2p_device_addr),
3256 dev->req_config_methods);
3257 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
3258 return 1;
3259 }
3260
3261 return 0;
3262 }
3263
3264
p2p_continue_find(struct p2p_data * p2p)3265 void p2p_continue_find(struct p2p_data *p2p)
3266 {
3267 struct p2p_device *dev;
3268 int found, res;
3269
3270 p2p_set_state(p2p, P2P_SEARCH);
3271
3272 /* Continue from the device following the last iteration */
3273 found = 0;
3274 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3275 if (dev == p2p->last_p2p_find_oper) {
3276 found = 1;
3277 continue;
3278 }
3279 if (!found)
3280 continue;
3281 res = p2p_pre_find_operation(p2p, dev);
3282 if (res > 0) {
3283 p2p->last_p2p_find_oper = dev;
3284 return;
3285 }
3286 if (res == -2)
3287 goto skip_sd;
3288 }
3289
3290 /*
3291 * Wrap around to the beginning of the list and continue until the last
3292 * iteration device.
3293 */
3294 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3295 res = p2p_pre_find_operation(p2p, dev);
3296 if (res > 0) {
3297 p2p->last_p2p_find_oper = dev;
3298 return;
3299 }
3300 if (res == -2)
3301 goto skip_sd;
3302 if (dev == p2p->last_p2p_find_oper)
3303 break;
3304 }
3305
3306 skip_sd:
3307 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN);
3308 p2p_listen_in_find(p2p, 1);
3309 }
3310
3311
p2p_sd_cb(struct p2p_data * p2p,int success)3312 static void p2p_sd_cb(struct p2p_data *p2p, int success)
3313 {
3314 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
3315 success);
3316 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3317
3318 if (!success) {
3319 if (p2p->sd_peer) {
3320 if (is_zero_ether_addr(p2p->sd_query_no_ack)) {
3321 os_memcpy(p2p->sd_query_no_ack,
3322 p2p->sd_peer->info.p2p_device_addr,
3323 ETH_ALEN);
3324 p2p_dbg(p2p,
3325 "First SD Query no-ACK in this search iteration: "
3326 MACSTR, MAC2STR(p2p->sd_query_no_ack));
3327 }
3328 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3329 }
3330 p2p->sd_peer = NULL;
3331 if (p2p->state != P2P_IDLE)
3332 p2p_continue_find(p2p);
3333 return;
3334 }
3335
3336 if (p2p->sd_peer == NULL) {
3337 p2p_dbg(p2p, "No SD peer entry known");
3338 if (p2p->state != P2P_IDLE)
3339 p2p_continue_find(p2p);
3340 return;
3341 }
3342
3343 if (p2p->sd_query && p2p->sd_query->for_all_peers) {
3344 /* Update the pending broadcast SD query count for this device
3345 */
3346 p2p->sd_peer->sd_pending_bcast_queries--;
3347
3348 /*
3349 * If there are no pending broadcast queries for this device,
3350 * mark it as done (-1).
3351 */
3352 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
3353 p2p->sd_peer->sd_pending_bcast_queries = -1;
3354 }
3355
3356 /* Wait for response from the peer */
3357 p2p_set_state(p2p, P2P_SD_DURING_FIND);
3358 p2p_set_timeout(p2p, 0, 200000);
3359 }
3360
3361
3362 /**
3363 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
3364 * @p2p: P2P module context from p2p_init()
3365 */
p2p_retry_pd(struct p2p_data * p2p)3366 static void p2p_retry_pd(struct p2p_data *p2p)
3367 {
3368 struct p2p_device *dev;
3369
3370 /*
3371 * Retry the prov disc req attempt only for the peer that the user had
3372 * requested.
3373 */
3374
3375 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3376 if (os_memcmp(p2p->pending_pd_devaddr,
3377 dev->info.p2p_device_addr, ETH_ALEN) != 0)
3378 continue;
3379 if (!dev->req_config_methods)
3380 continue;
3381
3382 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3383 MACSTR " (config methods 0x%x)",
3384 MAC2STR(dev->info.p2p_device_addr),
3385 dev->req_config_methods);
3386 p2p_send_prov_disc_req(p2p, dev,
3387 dev->flags & P2P_DEV_PD_FOR_JOIN,
3388 p2p->pd_force_freq);
3389 return;
3390 }
3391 }
3392
3393
p2p_prov_disc_cb(struct p2p_data * p2p,int success)3394 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
3395 {
3396 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
3397 success);
3398
3399 /*
3400 * Postpone resetting the pending action state till after we actually
3401 * time out. This allows us to take some action like notifying any
3402 * interested parties about no response to the request.
3403 *
3404 * When the timer (below) goes off we check in IDLE, SEARCH, or
3405 * LISTEN_ONLY state, which are the only allowed states to issue a PD
3406 * requests in, if this was still pending and then raise notification.
3407 */
3408
3409 if (!success) {
3410 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3411
3412 if (p2p->user_initiated_pd &&
3413 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
3414 {
3415 /* Retry request from timeout to avoid busy loops */
3416 p2p->pending_action_state = P2P_PENDING_PD;
3417 p2p_set_timeout(p2p, 0, 50000);
3418 } else if (p2p->state != P2P_IDLE)
3419 p2p_continue_find(p2p);
3420 else if (p2p->user_initiated_pd) {
3421 p2p->pending_action_state = P2P_PENDING_PD;
3422 p2p_set_timeout(p2p, 0, 300000);
3423 }
3424 return;
3425 }
3426
3427 /*
3428 * If after PD Request the peer doesn't expect to receive PD Response
3429 * the PD Request ACK indicates a completion of the current PD. This
3430 * happens only on the advertiser side sending the follow-on PD Request
3431 * with the status different than 12 (Success: accepted by user).
3432 */
3433 if (p2p->p2ps_prov && !p2p->p2ps_prov->pd_seeker &&
3434 p2p->p2ps_prov->status != P2P_SC_SUCCESS_DEFERRED) {
3435 p2p_dbg(p2p, "P2PS PD completion on Follow-on PD Request ACK");
3436
3437 if (p2p->send_action_in_progress) {
3438 p2p->send_action_in_progress = 0;
3439 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3440 }
3441
3442 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3443
3444 if (p2p->cfg->p2ps_prov_complete) {
3445 p2p->cfg->p2ps_prov_complete(
3446 p2p->cfg->cb_ctx,
3447 p2p->p2ps_prov->status,
3448 p2p->p2ps_prov->adv_mac,
3449 p2p->p2ps_prov->adv_mac,
3450 p2p->p2ps_prov->session_mac,
3451 NULL, p2p->p2ps_prov->adv_id,
3452 p2p->p2ps_prov->session_id,
3453 0, 0, NULL, 0, 0, 0,
3454 NULL, NULL, 0, 0, NULL, 0);
3455 }
3456
3457 if (p2p->user_initiated_pd)
3458 p2p_reset_pending_pd(p2p);
3459
3460 p2ps_prov_free(p2p);
3461 return;
3462 }
3463
3464 /*
3465 * This postponing, of resetting pending_action_state, needs to be
3466 * done only for user initiated PD requests and not internal ones.
3467 */
3468 if (p2p->user_initiated_pd)
3469 p2p->pending_action_state = P2P_PENDING_PD;
3470 else
3471 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3472
3473 /* Wait for response from the peer */
3474 if (p2p->state == P2P_SEARCH)
3475 p2p_set_state(p2p, P2P_PD_DURING_FIND);
3476 p2p_set_timeout(p2p, 0, 200000);
3477 }
3478
3479
p2p_prov_disc_resp_cb(struct p2p_data * p2p,int success)3480 static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success)
3481 {
3482 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d",
3483 success);
3484
3485 if (p2p->send_action_in_progress) {
3486 p2p->send_action_in_progress = 0;
3487 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3488 }
3489
3490 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3491
3492 if (!success) {
3493 if (p2p->state == P2P_SEARCH)
3494 p2p_continue_find(p2p);
3495 return;
3496 }
3497
3498 if (!p2p->cfg->prov_disc_resp_cb ||
3499 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1) {
3500 if (p2p->state == P2P_SEARCH)
3501 p2p_continue_find(p2p);
3502 return;
3503 }
3504
3505 p2p_dbg(p2p,
3506 "Post-Provision Discovery operations started - do not try to continue other P2P operations");
3507 }
3508
3509
p2p_scan_res_handler(struct p2p_data * p2p,const u8 * bssid,int freq,struct os_reltime * rx_time,int level,const u8 * ies,size_t ies_len)3510 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
3511 struct os_reltime *rx_time, int level, const u8 *ies,
3512 size_t ies_len)
3513 {
3514 if (os_reltime_before(rx_time, &p2p->find_start)) {
3515 /*
3516 * The driver may have cached (e.g., in cfg80211 BSS table) the
3517 * scan results for relatively long time. To avoid reporting
3518 * stale information, update P2P peers only based on results
3519 * that have based on frames received after the last p2p_find
3520 * operation was started.
3521 */
3522 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
3523 " (rx_time=%u.%06u find_start=%u.%06u)",
3524 MAC2STR(bssid), (unsigned int) rx_time->sec,
3525 (unsigned int) rx_time->usec,
3526 (unsigned int) p2p->find_start.sec,
3527 (unsigned int) p2p->find_start.usec);
3528 return 0;
3529 }
3530
3531 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
3532
3533 return 0;
3534 }
3535
3536
p2p_scan_res_handled(struct p2p_data * p2p,unsigned int delay)3537 void p2p_scan_res_handled(struct p2p_data *p2p, unsigned int delay)
3538 {
3539 if (!p2p->p2p_scan_running) {
3540 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
3541 }
3542 p2p->p2p_scan_running = 0;
3543
3544 /* Use this delay only when p2p_find doesn't set it */
3545 if (!p2p->search_delay)
3546 p2p->search_delay = delay;
3547
3548 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3549
3550 if (p2p_run_after_scan(p2p))
3551 return;
3552 if (p2p->state == P2P_SEARCH)
3553 p2p_continue_find(p2p);
3554 }
3555
3556
p2p_scan_ie(struct p2p_data * p2p,struct wpabuf * ies,const u8 * dev_id,unsigned int bands)3557 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id,
3558 unsigned int bands)
3559 {
3560 u8 dev_capab;
3561 u8 *len;
3562
3563 #ifdef CONFIG_WIFI_DISPLAY
3564 if (p2p->wfd_ie_probe_req)
3565 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3566 #endif /* CONFIG_WIFI_DISPLAY */
3567
3568 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3569 wpabuf_put_buf(ies,
3570 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3571
3572 len = p2p_buf_add_ie_hdr(ies);
3573
3574 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3575
3576 /* P2PS requires Probe Request frames to include SD bit */
3577 if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3578 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
3579
3580 p2p_buf_add_capability(ies, dev_capab, 0);
3581
3582 if (dev_id)
3583 p2p_buf_add_device_id(ies, dev_id);
3584 if (p2p->cfg->reg_class && p2p->cfg->channel)
3585 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3586 p2p->cfg->reg_class,
3587 p2p->cfg->channel);
3588 if (p2p->ext_listen_interval)
3589 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3590 p2p->ext_listen_interval);
3591
3592 if (bands & BAND_60_GHZ)
3593 p2p_buf_add_device_info(ies, p2p, NULL);
3594
3595 if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3596 p2p_buf_add_service_hash(ies, p2p);
3597
3598 /* TODO: p2p_buf_add_operating_channel() if GO */
3599 p2p_buf_update_ie_hdr(ies, len);
3600 }
3601
3602
p2p_scan_ie_buf_len(struct p2p_data * p2p)3603 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3604 {
3605 size_t len = 100;
3606
3607 #ifdef CONFIG_WIFI_DISPLAY
3608 if (p2p && p2p->wfd_ie_probe_req)
3609 len += wpabuf_len(p2p->wfd_ie_probe_req);
3610 #endif /* CONFIG_WIFI_DISPLAY */
3611
3612 if (p2p && p2p->vendor_elem &&
3613 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3614 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3615
3616 return len;
3617 }
3618
3619
p2p_ie_text(struct wpabuf * p2p_ie,char * buf,char * end)3620 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3621 {
3622 return p2p_attr_text(p2p_ie, buf, end);
3623 }
3624
3625
p2p_go_neg_req_cb(struct p2p_data * p2p,int success)3626 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3627 {
3628 struct p2p_device *dev = p2p->go_neg_peer;
3629 int timeout;
3630
3631 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3632
3633 if (dev == NULL) {
3634 p2p_dbg(p2p, "No pending GO Negotiation");
3635 return;
3636 }
3637
3638 if (success) {
3639 if (dev->flags & P2P_DEV_USER_REJECTED) {
3640 p2p_set_state(p2p, P2P_IDLE);
3641 return;
3642 }
3643 } else if (dev->go_neg_req_sent) {
3644 /* Cancel the increment from p2p_connect_send() on failure */
3645 dev->go_neg_req_sent--;
3646 }
3647
3648 if (!success &&
3649 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3650 !is_zero_ether_addr(dev->member_in_go_dev)) {
3651 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3652 MAC2STR(dev->info.p2p_device_addr));
3653 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3654 p2p_send_dev_disc_req(p2p, dev);
3655 return;
3656 }
3657
3658 /*
3659 * Use P2P find, if needed, to find the other device from its listen
3660 * channel.
3661 */
3662 p2p_set_state(p2p, P2P_CONNECT);
3663 timeout = success ? 500000 : 100000;
3664 if (!success && p2p->go_neg_peer &&
3665 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3666 unsigned int r;
3667 /*
3668 * Peer is expected to wait our response and we will skip the
3669 * listen phase. Add some randomness to the wait time here to
3670 * make it less likely to hit cases where we could end up in
3671 * sync with peer not listening.
3672 */
3673 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3674 r = 0;
3675 timeout += r % 100000;
3676 }
3677 p2p_set_timeout(p2p, 0, timeout);
3678 }
3679
3680
p2p_go_neg_resp_cb(struct p2p_data * p2p,int success)3681 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3682 {
3683 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3684 success);
3685 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3686 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3687 return;
3688 }
3689 p2p_set_state(p2p, P2P_CONNECT);
3690 p2p_set_timeout(p2p, 0, 500000);
3691 }
3692
3693
p2p_go_neg_resp_failure_cb(struct p2p_data * p2p,int success,const u8 * addr)3694 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3695 const u8 *addr)
3696 {
3697 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3698 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3699 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3700 return;
3701 }
3702
3703 if (success) {
3704 struct p2p_device *dev;
3705 dev = p2p_get_device(p2p, addr);
3706 if (dev &&
3707 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3708 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3709 }
3710
3711 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
3712 p2p_continue_find(p2p);
3713 }
3714
3715
p2p_go_neg_conf_cb(struct p2p_data * p2p,enum p2p_send_action_result result)3716 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3717 enum p2p_send_action_result result)
3718 {
3719 struct p2p_device *dev;
3720
3721 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3722 if (result == P2P_SEND_ACTION_FAILED) {
3723 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3724 p2p_go_neg_failed(p2p, -1);
3725 return;
3726 }
3727
3728 dev = p2p->go_neg_peer;
3729
3730 if (result == P2P_SEND_ACTION_NO_ACK) {
3731 /*
3732 * Retry GO Negotiation Confirmation
3733 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3734 * ACK for confirmation.
3735 */
3736 if (dev && dev->go_neg_conf &&
3737 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3738 p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3739 dev->go_neg_conf_sent);
3740 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3741 if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3742 dev->info.p2p_device_addr,
3743 p2p->cfg->dev_addr,
3744 dev->info.p2p_device_addr,
3745 wpabuf_head(dev->go_neg_conf),
3746 wpabuf_len(dev->go_neg_conf), 0) >=
3747 0) {
3748 dev->go_neg_conf_sent++;
3749 return;
3750 }
3751 p2p_dbg(p2p, "Failed to re-send Action frame");
3752
3753 /*
3754 * Continue with the assumption that the first attempt
3755 * went through and just the ACK frame was lost.
3756 */
3757 }
3758
3759 /*
3760 * It looks like the TX status for GO Negotiation Confirm is
3761 * often showing failure even when the peer has actually
3762 * received the frame. Since the peer may change channels
3763 * immediately after having received the frame, we may not see
3764 * an Ack for retries, so just dropping a single frame may
3765 * trigger this. To allow the group formation to succeed if the
3766 * peer did indeed receive the frame, continue regardless of
3767 * the TX status.
3768 */
3769 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3770 }
3771
3772 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3773
3774 if (dev == NULL)
3775 return;
3776
3777 p2p_go_complete(p2p, dev);
3778 }
3779
3780
p2p_send_action_cb(struct p2p_data * p2p,unsigned int freq,const u8 * dst,const u8 * src,const u8 * bssid,enum p2p_send_action_result result)3781 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3782 const u8 *src, const u8 *bssid,
3783 enum p2p_send_action_result result)
3784 {
3785 enum p2p_pending_action_state state;
3786 int success;
3787
3788 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3789 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
3790 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3791 MAC2STR(bssid), result, p2p_state_txt(p2p->state));
3792 success = result == P2P_SEND_ACTION_SUCCESS;
3793 state = p2p->pending_action_state;
3794 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3795 switch (state) {
3796 case P2P_NO_PENDING_ACTION:
3797 if (p2p->send_action_in_progress) {
3798 p2p->send_action_in_progress = 0;
3799 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3800 }
3801 break;
3802 case P2P_PENDING_GO_NEG_REQUEST:
3803 p2p_go_neg_req_cb(p2p, success);
3804 break;
3805 case P2P_PENDING_GO_NEG_RESPONSE:
3806 p2p_go_neg_resp_cb(p2p, success);
3807 break;
3808 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3809 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3810 break;
3811 case P2P_PENDING_GO_NEG_CONFIRM:
3812 p2p_go_neg_conf_cb(p2p, result);
3813 break;
3814 case P2P_PENDING_SD:
3815 p2p_sd_cb(p2p, success);
3816 break;
3817 case P2P_PENDING_PD:
3818 p2p_prov_disc_cb(p2p, success);
3819 break;
3820 case P2P_PENDING_PD_RESPONSE:
3821 p2p_prov_disc_resp_cb(p2p, success);
3822 break;
3823 case P2P_PENDING_INVITATION_REQUEST:
3824 p2p_invitation_req_cb(p2p, success);
3825 break;
3826 case P2P_PENDING_INVITATION_RESPONSE:
3827 p2p_invitation_resp_cb(p2p, success);
3828 break;
3829 case P2P_PENDING_DEV_DISC_REQUEST:
3830 p2p_dev_disc_req_cb(p2p, success);
3831 break;
3832 case P2P_PENDING_DEV_DISC_RESPONSE:
3833 p2p_dev_disc_resp_cb(p2p, success);
3834 break;
3835 case P2P_PENDING_GO_DISC_REQ:
3836 p2p_go_disc_req_cb(p2p, success);
3837 break;
3838 }
3839 }
3840
3841
p2p_listen_cb(struct p2p_data * p2p,unsigned int freq,unsigned int duration)3842 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3843 unsigned int duration)
3844 {
3845 if (freq == p2p->pending_client_disc_freq) {
3846 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3847 p2p->pending_client_disc_freq = 0;
3848 return;
3849 }
3850
3851 if (freq != p2p->pending_listen_freq) {
3852 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3853 freq, duration, p2p->pending_listen_freq);
3854 return;
3855 }
3856
3857 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3858 p2p->pending_listen_sec, p2p->pending_listen_usec,
3859 p2p->pending_listen_freq);
3860 p2p->in_listen = 1;
3861 p2p->drv_in_listen = freq;
3862 if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3863 /*
3864 * Add 20 msec extra wait to avoid race condition with driver
3865 * remain-on-channel end event, i.e., give driver more time to
3866 * complete the operation before our timeout expires.
3867 */
3868 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3869 p2p->pending_listen_usec + 20000);
3870 }
3871
3872 p2p->pending_listen_freq = 0;
3873 }
3874
3875
p2p_listen_end(struct p2p_data * p2p,unsigned int freq)3876 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3877 {
3878 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3879 p2p->drv_in_listen = 0;
3880 if (p2p->in_listen)
3881 return 0; /* Internal timeout will trigger the next step */
3882
3883 if (p2p->state == P2P_WAIT_PEER_CONNECT && p2p->go_neg_peer &&
3884 p2p->pending_listen_freq) {
3885 /*
3886 * Better wait a bit if the driver is unable to start
3887 * offchannel operation for some reason to continue with
3888 * P2P_WAIT_PEER_(IDLE/CONNECT) state transitions.
3889 */
3890 p2p_dbg(p2p,
3891 "Listen operation did not seem to start - delay idle phase to avoid busy loop");
3892 p2p_set_timeout(p2p, 0, 100000);
3893 return 1;
3894 }
3895
3896 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3897 if (p2p->go_neg_peer->connect_reqs >= 120) {
3898 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3899 p2p_go_neg_failed(p2p, -1);
3900 return 0;
3901 }
3902
3903 p2p_set_state(p2p, P2P_CONNECT);
3904 p2p_connect_send(p2p, p2p->go_neg_peer);
3905 return 1;
3906 } else if (p2p->state == P2P_SEARCH) {
3907 if (p2p->p2p_scan_running) {
3908 /*
3909 * Search is already in progress. This can happen if
3910 * an Action frame RX is reported immediately after
3911 * the end of a remain-on-channel operation and the
3912 * response frame to that is sent using an offchannel
3913 * operation while in p2p_find. Avoid an attempt to
3914 * restart a scan here.
3915 */
3916 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3917 return 1;
3918 }
3919 if (p2p->pending_listen_freq) {
3920 /*
3921 * Better wait a bit if the driver is unable to start
3922 * offchannel operation for some reason. p2p_search()
3923 * will be started from internal timeout.
3924 */
3925 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3926 p2p_set_timeout(p2p, 0, 100000);
3927 return 1;
3928 }
3929 if (p2p->search_delay) {
3930 p2p_dbg(p2p, "Delay search operation by %u ms",
3931 p2p->search_delay);
3932 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3933 (p2p->search_delay % 1000) * 1000);
3934 return 1;
3935 }
3936 p2p_search(p2p);
3937 return 1;
3938 }
3939
3940 return 0;
3941 }
3942
3943
p2p_timeout_connect(struct p2p_data * p2p)3944 static void p2p_timeout_connect(struct p2p_data *p2p)
3945 {
3946 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3947 if (p2p->go_neg_peer &&
3948 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3949 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3950 p2p_go_neg_failed(p2p, -1);
3951 return;
3952 }
3953 if (p2p->go_neg_peer &&
3954 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3955 p2p->go_neg_peer->connect_reqs < 120) {
3956 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3957 p2p_connect_send(p2p, p2p->go_neg_peer);
3958 return;
3959 }
3960 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3961 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3962 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3963 p2p_set_timeout(p2p, 0, 30000);
3964 return;
3965 }
3966 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3967 p2p_listen_in_find(p2p, 0);
3968 }
3969
3970
p2p_timeout_connect_listen(struct p2p_data * p2p)3971 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3972 {
3973 if (p2p->go_neg_peer) {
3974 if (p2p->drv_in_listen) {
3975 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3976 return;
3977 }
3978
3979 if (p2p->go_neg_peer->connect_reqs >= 120) {
3980 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3981 p2p_go_neg_failed(p2p, -1);
3982 return;
3983 }
3984
3985 p2p_set_state(p2p, P2P_CONNECT);
3986 p2p_connect_send(p2p, p2p->go_neg_peer);
3987 } else
3988 p2p_set_state(p2p, P2P_IDLE);
3989 }
3990
3991
p2p_timeout_wait_peer_connect(struct p2p_data * p2p)3992 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3993 {
3994 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3995
3996 if (p2p->cfg->is_concurrent_session_active &&
3997 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3998 p2p_set_timeout(p2p, 0, 500000);
3999 else
4000 p2p_set_timeout(p2p, 0, 200000);
4001 }
4002
4003
p2p_timeout_wait_peer_idle(struct p2p_data * p2p)4004 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
4005 {
4006 struct p2p_device *dev = p2p->go_neg_peer;
4007
4008 if (dev == NULL) {
4009 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
4010 return;
4011 }
4012
4013 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
4014 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
4015 if (p2p->pending_listen_freq) {
4016 p2p_dbg(p2p, "Clear pending_listen_freq for %s", __func__);
4017 p2p->pending_listen_freq = 0;
4018 }
4019 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
4020 p2p_listen_in_find(p2p, 0);
4021 }
4022
4023
p2p_timeout_sd_during_find(struct p2p_data * p2p)4024 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
4025 {
4026 p2p_dbg(p2p, "Service Discovery Query timeout");
4027 if (p2p->sd_peer) {
4028 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
4029 p2p->sd_peer = NULL;
4030 }
4031 p2p_continue_find(p2p);
4032 }
4033
4034
p2p_timeout_prov_disc_during_find(struct p2p_data * p2p)4035 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
4036 {
4037 p2p_dbg(p2p, "Provision Discovery Request timeout");
4038 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
4039 p2p_continue_find(p2p);
4040 }
4041
4042
p2p_timeout_prov_disc_req(struct p2p_data * p2p)4043 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
4044 {
4045 u32 adv_id = 0;
4046 u8 *adv_mac = NULL;
4047
4048 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4049
4050 /*
4051 * For user initiated PD requests that we have not gotten any responses
4052 * for while in IDLE state, we retry them a couple of times before
4053 * giving up.
4054 */
4055 if (!p2p->user_initiated_pd)
4056 return;
4057
4058 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
4059
4060 if (p2p->pd_retries) {
4061 p2p->pd_retries--;
4062 p2p_retry_pd(p2p);
4063 } else {
4064 struct p2p_device *dev;
4065 int for_join = 0;
4066
4067 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
4068 if (os_memcmp(p2p->pending_pd_devaddr,
4069 dev->info.p2p_device_addr, ETH_ALEN) != 0)
4070 continue;
4071 if (dev->req_config_methods &&
4072 (dev->flags & P2P_DEV_PD_FOR_JOIN))
4073 for_join = 1;
4074 }
4075
4076 if (p2p->p2ps_prov) {
4077 adv_id = p2p->p2ps_prov->adv_id;
4078 adv_mac = p2p->p2ps_prov->adv_mac;
4079 }
4080
4081 if (p2p->cfg->prov_disc_fail)
4082 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
4083 p2p->pending_pd_devaddr,
4084 for_join ?
4085 P2P_PROV_DISC_TIMEOUT_JOIN :
4086 P2P_PROV_DISC_TIMEOUT,
4087 adv_id, adv_mac, NULL);
4088 p2p_reset_pending_pd(p2p);
4089 }
4090 }
4091
4092
p2p_timeout_invite(struct p2p_data * p2p)4093 static void p2p_timeout_invite(struct p2p_data *p2p)
4094 {
4095 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
4096 p2p_set_state(p2p, P2P_INVITE_LISTEN);
4097 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
4098 /*
4099 * Better remain on operating channel instead of listen channel
4100 * when running a group.
4101 */
4102 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
4103 p2p_set_timeout(p2p, 0, 100000);
4104 return;
4105 }
4106 p2p_listen_in_find(p2p, 0);
4107 }
4108
4109
p2p_timeout_invite_listen(struct p2p_data * p2p)4110 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
4111 {
4112 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
4113 p2p_set_state(p2p, P2P_INVITE);
4114 p2p_invite_send(p2p, p2p->invite_peer,
4115 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
4116 } else {
4117 if (p2p->invite_peer) {
4118 p2p_dbg(p2p, "Invitation Request retry limit reached");
4119 if (p2p->cfg->invitation_result)
4120 p2p->cfg->invitation_result(
4121 p2p->cfg->cb_ctx, -1, NULL, NULL,
4122 p2p->invite_peer->info.p2p_device_addr,
4123 0, 0);
4124 }
4125 p2p_set_state(p2p, P2P_IDLE);
4126 }
4127 }
4128
4129
p2p_state_timeout(void * eloop_ctx,void * timeout_ctx)4130 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
4131 {
4132 struct p2p_data *p2p = eloop_ctx;
4133
4134 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
4135
4136 p2p->in_listen = 0;
4137 if (p2p->drv_in_listen) {
4138 p2p_dbg(p2p, "Driver is still in listen state - stop it");
4139 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
4140 }
4141
4142 switch (p2p->state) {
4143 case P2P_IDLE:
4144 /* Check if we timed out waiting for PD req */
4145 if (p2p->pending_action_state == P2P_PENDING_PD)
4146 p2p_timeout_prov_disc_req(p2p);
4147 break;
4148 case P2P_SEARCH:
4149 /* Check if we timed out waiting for PD req */
4150 if (p2p->pending_action_state == P2P_PENDING_PD)
4151 p2p_timeout_prov_disc_req(p2p);
4152 if (p2p->search_delay && !p2p->in_search_delay) {
4153 p2p_dbg(p2p, "Delay search operation by %u ms",
4154 p2p->search_delay);
4155 p2p->in_search_delay = 1;
4156 p2p_set_timeout(p2p, p2p->search_delay / 1000,
4157 (p2p->search_delay % 1000) * 1000);
4158 break;
4159 }
4160 p2p->in_search_delay = 0;
4161 p2p_search(p2p);
4162 break;
4163 case P2P_CONNECT:
4164 p2p_timeout_connect(p2p);
4165 break;
4166 case P2P_CONNECT_LISTEN:
4167 p2p_timeout_connect_listen(p2p);
4168 break;
4169 case P2P_GO_NEG:
4170 break;
4171 case P2P_LISTEN_ONLY:
4172 /* Check if we timed out waiting for PD req */
4173 if (p2p->pending_action_state == P2P_PENDING_PD)
4174 p2p_timeout_prov_disc_req(p2p);
4175
4176 if (p2p->ext_listen_only) {
4177 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
4178 p2p->ext_listen_only = 0;
4179 p2p_set_state(p2p, P2P_IDLE);
4180 }
4181 break;
4182 case P2P_WAIT_PEER_CONNECT:
4183 p2p_timeout_wait_peer_connect(p2p);
4184 break;
4185 case P2P_WAIT_PEER_IDLE:
4186 p2p_timeout_wait_peer_idle(p2p);
4187 break;
4188 case P2P_SD_DURING_FIND:
4189 p2p_timeout_sd_during_find(p2p);
4190 break;
4191 case P2P_PROVISIONING:
4192 break;
4193 case P2P_PD_DURING_FIND:
4194 p2p_timeout_prov_disc_during_find(p2p);
4195 break;
4196 case P2P_INVITE:
4197 p2p_timeout_invite(p2p);
4198 break;
4199 case P2P_INVITE_LISTEN:
4200 p2p_timeout_invite_listen(p2p);
4201 break;
4202 }
4203 }
4204
4205
p2p_reject(struct p2p_data * p2p,const u8 * peer_addr)4206 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
4207 {
4208 struct p2p_device *dev;
4209
4210 dev = p2p_get_device(p2p, peer_addr);
4211 p2p_dbg(p2p, "Local request to reject connection attempts by peer "
4212 MACSTR, MAC2STR(peer_addr));
4213 if (dev == NULL) {
4214 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
4215 return -1;
4216 }
4217 dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
4218 dev->flags |= P2P_DEV_USER_REJECTED;
4219 return 0;
4220 }
4221
4222
p2p_wps_method_text(enum p2p_wps_method method)4223 const char * p2p_wps_method_text(enum p2p_wps_method method)
4224 {
4225 switch (method) {
4226 case WPS_NOT_READY:
4227 return "not-ready";
4228 case WPS_PIN_DISPLAY:
4229 return "Display";
4230 case WPS_PIN_KEYPAD:
4231 return "Keypad";
4232 case WPS_PBC:
4233 return "PBC";
4234 case WPS_NFC:
4235 return "NFC";
4236 case WPS_P2PS:
4237 return "P2PS";
4238 }
4239
4240 return "??";
4241 }
4242
4243
p2p_go_state_text(enum p2p_go_state go_state)4244 static const char * p2p_go_state_text(enum p2p_go_state go_state)
4245 {
4246 switch (go_state) {
4247 case UNKNOWN_GO:
4248 return "unknown";
4249 case LOCAL_GO:
4250 return "local";
4251 case REMOTE_GO:
4252 return "remote";
4253 }
4254
4255 return "??";
4256 }
4257
4258
p2p_get_peer_info(struct p2p_data * p2p,const u8 * addr,int next)4259 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
4260 const u8 *addr, int next)
4261 {
4262 struct p2p_device *dev;
4263
4264 if (addr)
4265 dev = p2p_get_device(p2p, addr);
4266 else
4267 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4268
4269 if (dev && next) {
4270 dev = dl_list_first(&dev->list, struct p2p_device, list);
4271 if (&dev->list == &p2p->devices)
4272 dev = NULL;
4273 }
4274
4275 if (dev == NULL)
4276 return NULL;
4277
4278 return &dev->info;
4279 }
4280
4281
p2p_get_peer_info_txt(const struct p2p_peer_info * info,char * buf,size_t buflen)4282 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
4283 char *buf, size_t buflen)
4284 {
4285 struct p2p_device *dev;
4286 int res;
4287 char *pos, *end;
4288 struct os_reltime now;
4289
4290 if (info == NULL)
4291 return -1;
4292
4293 dev = (struct p2p_device *) (((u8 *) info) -
4294 offsetof(struct p2p_device, info));
4295
4296 pos = buf;
4297 end = buf + buflen;
4298
4299 os_get_reltime(&now);
4300 res = os_snprintf(pos, end - pos,
4301 "age=%d\n"
4302 "listen_freq=%d\n"
4303 "wps_method=%s\n"
4304 "interface_addr=" MACSTR "\n"
4305 "member_in_go_dev=" MACSTR "\n"
4306 "member_in_go_iface=" MACSTR "\n"
4307 "go_neg_req_sent=%d\n"
4308 "go_state=%s\n"
4309 "dialog_token=%u\n"
4310 "intended_addr=" MACSTR "\n"
4311 "country=%c%c\n"
4312 "oper_freq=%d\n"
4313 "req_config_methods=0x%x\n"
4314 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
4315 "status=%d\n"
4316 "invitation_reqs=%u\n",
4317 (int) (now.sec - dev->last_seen.sec),
4318 dev->listen_freq,
4319 p2p_wps_method_text(dev->wps_method),
4320 MAC2STR(dev->interface_addr),
4321 MAC2STR(dev->member_in_go_dev),
4322 MAC2STR(dev->member_in_go_iface),
4323 dev->go_neg_req_sent,
4324 p2p_go_state_text(dev->go_state),
4325 dev->dialog_token,
4326 MAC2STR(dev->intended_addr),
4327 dev->country[0] ? dev->country[0] : '_',
4328 dev->country[1] ? dev->country[1] : '_',
4329 dev->oper_freq,
4330 dev->req_config_methods,
4331 dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
4332 "[PROBE_REQ_ONLY]" : "",
4333 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
4334 dev->flags & P2P_DEV_NOT_YET_READY ?
4335 "[NOT_YET_READY]" : "",
4336 dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
4337 "[PD_PEER_DISPLAY]" : "",
4338 dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
4339 "[PD_PEER_KEYPAD]" : "",
4340 dev->flags & P2P_DEV_PD_PEER_P2PS ?
4341 "[PD_PEER_P2PS]" : "",
4342 dev->flags & P2P_DEV_USER_REJECTED ?
4343 "[USER_REJECTED]" : "",
4344 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
4345 "[PEER_WAITING_RESPONSE]" : "",
4346 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
4347 "[PREFER_PERSISTENT_GROUP]" : "",
4348 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
4349 "[WAIT_GO_NEG_RESPONSE]" : "",
4350 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
4351 "[WAIT_GO_NEG_CONFIRM]" : "",
4352 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
4353 "[GROUP_CLIENT_ONLY]" : "",
4354 dev->flags & P2P_DEV_FORCE_FREQ ?
4355 "[FORCE_FREQ]" : "",
4356 dev->flags & P2P_DEV_PD_FOR_JOIN ?
4357 "[PD_FOR_JOIN]" : "",
4358 dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT ?
4359 "[LAST_SEEN_AS_GROUP_CLIENT]" : "",
4360 dev->status,
4361 dev->invitation_reqs);
4362 if (os_snprintf_error(end - pos, res))
4363 return pos - buf;
4364 pos += res;
4365
4366 if (dev->ext_listen_period) {
4367 res = os_snprintf(pos, end - pos,
4368 "ext_listen_period=%u\n"
4369 "ext_listen_interval=%u\n",
4370 dev->ext_listen_period,
4371 dev->ext_listen_interval);
4372 if (os_snprintf_error(end - pos, res))
4373 return pos - buf;
4374 pos += res;
4375 }
4376
4377 if (dev->oper_ssid_len) {
4378 res = os_snprintf(pos, end - pos,
4379 "oper_ssid=%s\n",
4380 wpa_ssid_txt(dev->oper_ssid,
4381 dev->oper_ssid_len));
4382 if (os_snprintf_error(end - pos, res))
4383 return pos - buf;
4384 pos += res;
4385 }
4386
4387 #ifdef CONFIG_WIFI_DISPLAY
4388 if (dev->info.wfd_subelems) {
4389 res = os_snprintf(pos, end - pos, "wfd_subelems=");
4390 if (os_snprintf_error(end - pos, res))
4391 return pos - buf;
4392 pos += res;
4393
4394 pos += wpa_snprintf_hex(pos, end - pos,
4395 wpabuf_head(dev->info.wfd_subelems),
4396 wpabuf_len(dev->info.wfd_subelems));
4397
4398 res = os_snprintf(pos, end - pos, "\n");
4399 if (os_snprintf_error(end - pos, res))
4400 return pos - buf;
4401 pos += res;
4402 }
4403 #endif /* CONFIG_WIFI_DISPLAY */
4404
4405 return pos - buf;
4406 }
4407
4408
p2p_peer_known(struct p2p_data * p2p,const u8 * addr)4409 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
4410 {
4411 return p2p_get_device(p2p, addr) != NULL;
4412 }
4413
4414
p2p_set_client_discoverability(struct p2p_data * p2p,int enabled)4415 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
4416 {
4417 if (enabled) {
4418 p2p_dbg(p2p, "Client discoverability enabled");
4419 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4420 } else {
4421 p2p_dbg(p2p, "Client discoverability disabled");
4422 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4423 }
4424 }
4425
4426
p2p_build_presence_req(u32 duration1,u32 interval1,u32 duration2,u32 interval2)4427 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
4428 u32 duration2, u32 interval2)
4429 {
4430 struct wpabuf *req;
4431 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
4432 u8 *len;
4433
4434 req = wpabuf_alloc(100);
4435 if (req == NULL)
4436 return NULL;
4437
4438 if (duration1 || interval1) {
4439 os_memset(&desc1, 0, sizeof(desc1));
4440 desc1.count_type = 1;
4441 desc1.duration = duration1;
4442 desc1.interval = interval1;
4443 ptr1 = &desc1;
4444
4445 if (duration2 || interval2) {
4446 os_memset(&desc2, 0, sizeof(desc2));
4447 desc2.count_type = 2;
4448 desc2.duration = duration2;
4449 desc2.interval = interval2;
4450 ptr2 = &desc2;
4451 }
4452 }
4453
4454 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
4455 len = p2p_buf_add_ie_hdr(req);
4456 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
4457 p2p_buf_update_ie_hdr(req, len);
4458
4459 return req;
4460 }
4461
4462
p2p_presence_req(struct p2p_data * p2p,const u8 * go_interface_addr,const u8 * own_interface_addr,unsigned int freq,u32 duration1,u32 interval1,u32 duration2,u32 interval2)4463 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
4464 const u8 *own_interface_addr, unsigned int freq,
4465 u32 duration1, u32 interval1, u32 duration2,
4466 u32 interval2)
4467 {
4468 struct wpabuf *req;
4469
4470 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
4471 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
4472 "dur2=%u int2=%u",
4473 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
4474 freq, duration1, interval1, duration2, interval2);
4475
4476 req = p2p_build_presence_req(duration1, interval1, duration2,
4477 interval2);
4478 if (req == NULL)
4479 return -1;
4480
4481 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4482 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
4483 go_interface_addr,
4484 wpabuf_head(req), wpabuf_len(req), 200) < 0) {
4485 p2p_dbg(p2p, "Failed to send Action frame");
4486 }
4487 wpabuf_free(req);
4488
4489 return 0;
4490 }
4491
4492
p2p_build_presence_resp(u8 status,const u8 * noa,size_t noa_len,u8 dialog_token)4493 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
4494 size_t noa_len, u8 dialog_token)
4495 {
4496 struct wpabuf *resp;
4497 u8 *len;
4498
4499 resp = wpabuf_alloc(100 + noa_len);
4500 if (resp == NULL)
4501 return NULL;
4502
4503 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
4504 len = p2p_buf_add_ie_hdr(resp);
4505 p2p_buf_add_status(resp, status);
4506 if (noa) {
4507 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
4508 wpabuf_put_le16(resp, noa_len);
4509 wpabuf_put_data(resp, noa, noa_len);
4510 } else
4511 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
4512 p2p_buf_update_ie_hdr(resp, len);
4513
4514 return resp;
4515 }
4516
4517
p2p_process_presence_req(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len,int rx_freq)4518 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
4519 const u8 *sa, const u8 *data, size_t len,
4520 int rx_freq)
4521 {
4522 struct p2p_message msg;
4523 u8 status;
4524 struct wpabuf *resp;
4525 size_t g;
4526 struct p2p_group *group = NULL;
4527 int parsed = 0;
4528 u8 noa[50];
4529 int noa_len;
4530
4531 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
4532
4533 for (g = 0; g < p2p->num_groups; g++) {
4534 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
4535 ETH_ALEN) == 0) {
4536 group = p2p->groups[g];
4537 break;
4538 }
4539 }
4540 if (group == NULL) {
4541 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
4542 MACSTR, MAC2STR(da));
4543 return;
4544 }
4545
4546 if (p2p_parse(data, len, &msg) < 0) {
4547 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
4548 status = P2P_SC_FAIL_INVALID_PARAMS;
4549 goto fail;
4550 }
4551 parsed = 1;
4552
4553 if (msg.noa == NULL) {
4554 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
4555 status = P2P_SC_FAIL_INVALID_PARAMS;
4556 goto fail;
4557 }
4558
4559 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
4560
4561 fail:
4562 if (p2p->cfg->get_noa)
4563 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
4564 sizeof(noa));
4565 else
4566 noa_len = -1;
4567 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
4568 noa_len > 0 ? noa_len : 0,
4569 msg.dialog_token);
4570 if (parsed)
4571 p2p_parse_free(&msg);
4572 if (resp == NULL)
4573 return;
4574
4575 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4576 if (p2p_send_action(p2p, rx_freq, sa, da, da,
4577 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
4578 p2p_dbg(p2p, "Failed to send Action frame");
4579 }
4580 wpabuf_free(resp);
4581 }
4582
4583
p2p_process_presence_resp(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len)4584 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
4585 const u8 *sa, const u8 *data, size_t len)
4586 {
4587 struct p2p_message msg;
4588
4589 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
4590
4591 if (p2p_parse(data, len, &msg) < 0) {
4592 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
4593 return;
4594 }
4595
4596 if (msg.status == NULL || msg.noa == NULL) {
4597 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
4598 p2p_parse_free(&msg);
4599 return;
4600 }
4601
4602 if (p2p->cfg->presence_resp) {
4603 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4604 msg.noa, msg.noa_len);
4605 }
4606
4607 if (*msg.status) {
4608 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4609 *msg.status);
4610 p2p_parse_free(&msg);
4611 return;
4612 }
4613
4614 p2p_dbg(p2p, "P2P Presence Request was accepted");
4615 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4616 msg.noa, msg.noa_len);
4617 /* TODO: process NoA */
4618 p2p_parse_free(&msg);
4619 }
4620
4621
p2p_ext_listen_timeout(void * eloop_ctx,void * timeout_ctx)4622 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4623 {
4624 struct p2p_data *p2p = eloop_ctx;
4625
4626 if (p2p->ext_listen_interval) {
4627 /* Schedule next extended listen timeout */
4628 eloop_register_timeout(p2p->ext_listen_interval_sec,
4629 p2p->ext_listen_interval_usec,
4630 p2p_ext_listen_timeout, p2p, NULL);
4631 }
4632
4633 if ((p2p->cfg->is_p2p_in_progress &&
4634 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4635 (p2p->pending_action_state == P2P_PENDING_PD &&
4636 p2p->pd_retries > 0)) {
4637 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4638 p2p_state_txt(p2p->state));
4639 return;
4640 }
4641
4642 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4643 /*
4644 * This should not really happen, but it looks like the Listen
4645 * command may fail is something else (e.g., a scan) was
4646 * running at an inconvenient time. As a workaround, allow new
4647 * Extended Listen operation to be started.
4648 */
4649 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4650 p2p->ext_listen_only = 0;
4651 p2p_set_state(p2p, P2P_IDLE);
4652 }
4653
4654 if (p2p->state != P2P_IDLE) {
4655 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4656 return;
4657 }
4658
4659 p2p_dbg(p2p, "Extended Listen timeout");
4660 p2p->ext_listen_only = 1;
4661 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4662 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4663 p2p->ext_listen_only = 0;
4664 }
4665 }
4666
4667
p2p_ext_listen(struct p2p_data * p2p,unsigned int period,unsigned int interval)4668 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4669 unsigned int interval)
4670 {
4671 if (period > 65535 || interval > 65535 || period > interval ||
4672 (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4673 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4674 period, interval);
4675 return -1;
4676 }
4677
4678 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4679
4680 if (interval == 0) {
4681 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4682 p2p->ext_listen_period = 0;
4683 p2p->ext_listen_interval = 0;
4684 return 0;
4685 }
4686
4687 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4688 period, interval);
4689 p2p->ext_listen_period = period;
4690 p2p->ext_listen_interval = interval;
4691 p2p->ext_listen_interval_sec = interval / 1000;
4692 p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4693
4694 eloop_register_timeout(p2p->ext_listen_interval_sec,
4695 p2p->ext_listen_interval_usec,
4696 p2p_ext_listen_timeout, p2p, NULL);
4697
4698 return 0;
4699 }
4700
4701
p2p_deauth_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)4702 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4703 const u8 *ie, size_t ie_len)
4704 {
4705 struct p2p_message msg;
4706
4707 if (bssid == NULL || ie == NULL)
4708 return;
4709
4710 os_memset(&msg, 0, sizeof(msg));
4711 if (p2p_parse_ies(ie, ie_len, &msg))
4712 return;
4713 if (msg.minor_reason_code == NULL) {
4714 p2p_parse_free(&msg);
4715 return;
4716 }
4717
4718 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4719 " reason_code=%u minor_reason_code=%u",
4720 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4721
4722 p2p_parse_free(&msg);
4723 }
4724
4725
p2p_disassoc_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)4726 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4727 const u8 *ie, size_t ie_len)
4728 {
4729 struct p2p_message msg;
4730
4731 if (bssid == NULL || ie == NULL)
4732 return;
4733
4734 os_memset(&msg, 0, sizeof(msg));
4735 if (p2p_parse_ies(ie, ie_len, &msg))
4736 return;
4737 if (msg.minor_reason_code == NULL) {
4738 p2p_parse_free(&msg);
4739 return;
4740 }
4741
4742 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4743 " reason_code=%u minor_reason_code=%u",
4744 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4745
4746 p2p_parse_free(&msg);
4747 }
4748
4749
p2p_set_managed_oper(struct p2p_data * p2p,int enabled)4750 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4751 {
4752 if (enabled) {
4753 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4754 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4755 } else {
4756 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4757 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4758 }
4759 }
4760
4761
p2p_config_get_random_social(struct p2p_config * p2p,u8 * op_class,u8 * op_channel,struct wpa_freq_range_list * avoid_list,struct wpa_freq_range_list * disallow_list)4762 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4763 u8 *op_channel,
4764 struct wpa_freq_range_list *avoid_list,
4765 struct wpa_freq_range_list *disallow_list)
4766 {
4767 return p2p_channel_random_social(&p2p->channels, op_class, op_channel,
4768 avoid_list, disallow_list);
4769 }
4770
4771
p2p_set_listen_channel(struct p2p_data * p2p,u8 reg_class,u8 channel,u8 forced)4772 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4773 u8 forced)
4774 {
4775 if (p2p_channel_to_freq(reg_class, channel) < 0)
4776 return -1;
4777
4778 /*
4779 * Listen channel was set in configuration or set by control interface;
4780 * cannot override it.
4781 */
4782 if (p2p->cfg->channel_forced && forced == 0) {
4783 p2p_dbg(p2p,
4784 "Listen channel was previously configured - do not override based on optimization");
4785 return -1;
4786 }
4787
4788 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4789 reg_class, channel);
4790
4791 if (p2p->state == P2P_IDLE) {
4792 p2p->cfg->reg_class = reg_class;
4793 p2p->cfg->channel = channel;
4794 p2p->cfg->channel_forced = forced;
4795 } else {
4796 p2p_dbg(p2p, "Defer setting listen channel");
4797 p2p->pending_reg_class = reg_class;
4798 p2p->pending_channel = channel;
4799 p2p->pending_channel_forced = forced;
4800 }
4801
4802 return 0;
4803 }
4804
4805
p2p_get_listen_channel(struct p2p_data * p2p)4806 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4807 {
4808 return p2p->cfg->channel;
4809 }
4810
4811
p2p_set_ssid_postfix(struct p2p_data * p2p,const u8 * postfix,size_t len)4812 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4813 {
4814 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4815 if (postfix == NULL) {
4816 p2p->cfg->ssid_postfix_len = 0;
4817 return 0;
4818 }
4819 if (len > sizeof(p2p->cfg->ssid_postfix))
4820 return -1;
4821 os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4822 p2p->cfg->ssid_postfix_len = len;
4823 return 0;
4824 }
4825
4826
p2p_set_oper_channel(struct p2p_data * p2p,u8 op_reg_class,u8 op_channel,int cfg_op_channel)4827 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4828 int cfg_op_channel)
4829 {
4830 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4831 return -1;
4832
4833 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4834 op_reg_class, op_channel);
4835 p2p->cfg->op_reg_class = op_reg_class;
4836 p2p->cfg->op_channel = op_channel;
4837 p2p->cfg->cfg_op_channel = cfg_op_channel;
4838 return 0;
4839 }
4840
4841
p2p_set_pref_chan(struct p2p_data * p2p,unsigned int num_pref_chan,const struct p2p_channel * pref_chan)4842 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4843 const struct p2p_channel *pref_chan)
4844 {
4845 struct p2p_channel *n;
4846
4847 if (pref_chan) {
4848 n = os_memdup(pref_chan,
4849 num_pref_chan * sizeof(struct p2p_channel));
4850 if (n == NULL)
4851 return -1;
4852 } else
4853 n = NULL;
4854
4855 os_free(p2p->cfg->pref_chan);
4856 p2p->cfg->pref_chan = n;
4857 p2p->cfg->num_pref_chan = num_pref_chan;
4858
4859 return 0;
4860 }
4861
4862
p2p_set_no_go_freq(struct p2p_data * p2p,const struct wpa_freq_range_list * list)4863 int p2p_set_no_go_freq(struct p2p_data *p2p,
4864 const struct wpa_freq_range_list *list)
4865 {
4866 struct wpa_freq_range *tmp;
4867
4868 if (list == NULL || list->num == 0) {
4869 os_free(p2p->no_go_freq.range);
4870 p2p->no_go_freq.range = NULL;
4871 p2p->no_go_freq.num = 0;
4872 return 0;
4873 }
4874
4875 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4876 if (tmp == NULL)
4877 return -1;
4878 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4879 os_free(p2p->no_go_freq.range);
4880 p2p->no_go_freq.range = tmp;
4881 p2p->no_go_freq.num = list->num;
4882 p2p_dbg(p2p, "Updated no GO chan list");
4883
4884 return 0;
4885 }
4886
4887
p2p_get_interface_addr(struct p2p_data * p2p,const u8 * dev_addr,u8 * iface_addr)4888 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4889 u8 *iface_addr)
4890 {
4891 struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4892 if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4893 return -1;
4894 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4895 return 0;
4896 }
4897
4898
p2p_get_dev_addr(struct p2p_data * p2p,const u8 * iface_addr,u8 * dev_addr)4899 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4900 u8 *dev_addr)
4901 {
4902 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4903 if (dev == NULL)
4904 return -1;
4905 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4906 return 0;
4907 }
4908
4909
p2p_set_peer_filter(struct p2p_data * p2p,const u8 * addr)4910 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4911 {
4912 os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4913 if (is_zero_ether_addr(p2p->peer_filter))
4914 p2p_dbg(p2p, "Disable peer filter");
4915 else
4916 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4917 MAC2STR(p2p->peer_filter));
4918 }
4919
4920
p2p_set_cross_connect(struct p2p_data * p2p,int enabled)4921 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4922 {
4923 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4924 if (p2p->cross_connect == enabled)
4925 return;
4926 p2p->cross_connect = enabled;
4927 /* TODO: may need to tear down any action group where we are GO(?) */
4928 }
4929
4930
p2p_get_oper_freq(struct p2p_data * p2p,const u8 * iface_addr)4931 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4932 {
4933 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4934 if (dev == NULL)
4935 return -1;
4936 if (dev->oper_freq <= 0)
4937 return -1;
4938 return dev->oper_freq;
4939 }
4940
4941
p2p_set_intra_bss_dist(struct p2p_data * p2p,int enabled)4942 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4943 {
4944 p2p_dbg(p2p, "Intra BSS distribution %s",
4945 enabled ? "enabled" : "disabled");
4946 p2p->cfg->p2p_intra_bss = enabled;
4947 }
4948
4949
p2p_update_channel_list(struct p2p_data * p2p,const struct p2p_channels * chan,const struct p2p_channels * cli_chan)4950 void p2p_update_channel_list(struct p2p_data *p2p,
4951 const struct p2p_channels *chan,
4952 const struct p2p_channels *cli_chan)
4953 {
4954 p2p_dbg(p2p, "Update channel list");
4955 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4956 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4957 os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4958 sizeof(struct p2p_channels));
4959 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4960 }
4961
4962
p2p_send_action(struct p2p_data * p2p,unsigned int freq,const u8 * dst,const u8 * src,const u8 * bssid,const u8 * buf,size_t len,unsigned int wait_time)4963 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4964 const u8 *src, const u8 *bssid, const u8 *buf,
4965 size_t len, unsigned int wait_time)
4966 {
4967 int res, scheduled;
4968
4969 res = p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4970 buf, len, wait_time, &scheduled);
4971 if (res == 0 && scheduled && p2p->in_listen && freq > 0 &&
4972 p2p->drv_in_listen > 0 &&
4973 (unsigned int) p2p->drv_in_listen != freq) {
4974 p2p_dbg(p2p,
4975 "Stop listen on %d MHz to allow a frame to be sent immediately on %d MHz",
4976 p2p->drv_in_listen, freq);
4977 p2p_stop_listen_for_freq(p2p, freq);
4978 }
4979 return res;
4980 }
4981
4982
p2p_set_best_channels(struct p2p_data * p2p,int freq_24,int freq_5,int freq_overall)4983 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4984 int freq_overall)
4985 {
4986 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d",
4987 freq_24, freq_5, freq_overall);
4988 p2p->best_freq_24 = freq_24;
4989 p2p->best_freq_5 = freq_5;
4990 p2p->best_freq_overall = freq_overall;
4991 }
4992
4993
p2p_set_own_freq_preference(struct p2p_data * p2p,int freq)4994 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4995 {
4996 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4997 p2p->own_freq_preference = freq;
4998 }
4999
5000
p2p_get_go_neg_peer(struct p2p_data * p2p)5001 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
5002 {
5003 if (p2p == NULL || p2p->go_neg_peer == NULL)
5004 return NULL;
5005 return p2p->go_neg_peer->info.p2p_device_addr;
5006 }
5007
5008
5009 const struct p2p_peer_info *
p2p_get_peer_found(struct p2p_data * p2p,const u8 * addr,int next)5010 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
5011 {
5012 struct p2p_device *dev;
5013
5014 if (addr) {
5015 dev = p2p_get_device(p2p, addr);
5016 if (!dev)
5017 return NULL;
5018
5019 if (!next) {
5020 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
5021 return NULL;
5022
5023 return &dev->info;
5024 } else {
5025 do {
5026 dev = dl_list_first(&dev->list,
5027 struct p2p_device,
5028 list);
5029 if (!dev || &dev->list == &p2p->devices)
5030 return NULL;
5031 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
5032 }
5033 } else {
5034 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
5035 if (!dev)
5036 return NULL;
5037 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
5038 dev = dl_list_first(&dev->list,
5039 struct p2p_device,
5040 list);
5041 if (!dev || &dev->list == &p2p->devices)
5042 return NULL;
5043 }
5044 }
5045
5046 return &dev->info;
5047 }
5048
5049
p2p_in_progress(struct p2p_data * p2p)5050 int p2p_in_progress(struct p2p_data *p2p)
5051 {
5052 if (p2p == NULL)
5053 return 0;
5054 if (p2p->state == P2P_SEARCH)
5055 return 2;
5056 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
5057 }
5058
5059
p2p_set_config_timeout(struct p2p_data * p2p,u8 go_timeout,u8 client_timeout)5060 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
5061 u8 client_timeout)
5062 {
5063 if (p2p) {
5064 p2p->go_timeout = go_timeout;
5065 p2p->client_timeout = client_timeout;
5066 }
5067 }
5068
5069
5070 #ifdef CONFIG_WIFI_DISPLAY
5071
p2p_update_wfd_ie_groups(struct p2p_data * p2p)5072 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
5073 {
5074 size_t g;
5075 struct p2p_group *group;
5076
5077 for (g = 0; g < p2p->num_groups; g++) {
5078 group = p2p->groups[g];
5079 p2p_group_force_beacon_update_ies(group);
5080 }
5081 }
5082
5083
p2p_set_wfd_ie_beacon(struct p2p_data * p2p,struct wpabuf * ie)5084 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
5085 {
5086 wpabuf_free(p2p->wfd_ie_beacon);
5087 p2p->wfd_ie_beacon = ie;
5088 p2p_update_wfd_ie_groups(p2p);
5089 return 0;
5090 }
5091
5092
p2p_set_wfd_ie_probe_req(struct p2p_data * p2p,struct wpabuf * ie)5093 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
5094 {
5095 wpabuf_free(p2p->wfd_ie_probe_req);
5096 p2p->wfd_ie_probe_req = ie;
5097 return 0;
5098 }
5099
5100
p2p_set_wfd_ie_probe_resp(struct p2p_data * p2p,struct wpabuf * ie)5101 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
5102 {
5103 wpabuf_free(p2p->wfd_ie_probe_resp);
5104 p2p->wfd_ie_probe_resp = ie;
5105 p2p_update_wfd_ie_groups(p2p);
5106 return 0;
5107 }
5108
5109
p2p_set_wfd_ie_assoc_req(struct p2p_data * p2p,struct wpabuf * ie)5110 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
5111 {
5112 wpabuf_free(p2p->wfd_ie_assoc_req);
5113 p2p->wfd_ie_assoc_req = ie;
5114 return 0;
5115 }
5116
5117
p2p_set_wfd_ie_invitation(struct p2p_data * p2p,struct wpabuf * ie)5118 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
5119 {
5120 wpabuf_free(p2p->wfd_ie_invitation);
5121 p2p->wfd_ie_invitation = ie;
5122 return 0;
5123 }
5124
5125
p2p_set_wfd_ie_prov_disc_req(struct p2p_data * p2p,struct wpabuf * ie)5126 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
5127 {
5128 wpabuf_free(p2p->wfd_ie_prov_disc_req);
5129 p2p->wfd_ie_prov_disc_req = ie;
5130 return 0;
5131 }
5132
5133
p2p_set_wfd_ie_prov_disc_resp(struct p2p_data * p2p,struct wpabuf * ie)5134 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
5135 {
5136 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
5137 p2p->wfd_ie_prov_disc_resp = ie;
5138 return 0;
5139 }
5140
5141
p2p_set_wfd_ie_go_neg(struct p2p_data * p2p,struct wpabuf * ie)5142 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
5143 {
5144 wpabuf_free(p2p->wfd_ie_go_neg);
5145 p2p->wfd_ie_go_neg = ie;
5146 return 0;
5147 }
5148
5149
p2p_set_wfd_dev_info(struct p2p_data * p2p,const struct wpabuf * elem)5150 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
5151 {
5152 wpabuf_free(p2p->wfd_dev_info);
5153 if (elem) {
5154 p2p->wfd_dev_info = wpabuf_dup(elem);
5155 if (p2p->wfd_dev_info == NULL)
5156 return -1;
5157 } else
5158 p2p->wfd_dev_info = NULL;
5159
5160 return 0;
5161 }
5162
5163
p2p_set_wfd_r2_dev_info(struct p2p_data * p2p,const struct wpabuf * elem)5164 int p2p_set_wfd_r2_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
5165 {
5166 wpabuf_free(p2p->wfd_r2_dev_info);
5167 if (elem) {
5168 p2p->wfd_r2_dev_info = wpabuf_dup(elem);
5169 if (p2p->wfd_r2_dev_info == NULL)
5170 return -1;
5171 } else
5172 p2p->wfd_r2_dev_info = NULL;
5173
5174 return 0;
5175 }
5176
5177
p2p_set_wfd_assoc_bssid(struct p2p_data * p2p,const struct wpabuf * elem)5178 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
5179 {
5180 wpabuf_free(p2p->wfd_assoc_bssid);
5181 if (elem) {
5182 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
5183 if (p2p->wfd_assoc_bssid == NULL)
5184 return -1;
5185 } else
5186 p2p->wfd_assoc_bssid = NULL;
5187
5188 return 0;
5189 }
5190
5191
p2p_set_wfd_coupled_sink_info(struct p2p_data * p2p,const struct wpabuf * elem)5192 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
5193 const struct wpabuf *elem)
5194 {
5195 wpabuf_free(p2p->wfd_coupled_sink_info);
5196 if (elem) {
5197 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
5198 if (p2p->wfd_coupled_sink_info == NULL)
5199 return -1;
5200 } else
5201 p2p->wfd_coupled_sink_info = NULL;
5202
5203 return 0;
5204 }
5205
5206 #endif /* CONFIG_WIFI_DISPLAY */
5207
5208
p2p_set_disc_int(struct p2p_data * p2p,int min_disc_int,int max_disc_int,int max_disc_tu)5209 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
5210 int max_disc_tu)
5211 {
5212 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
5213 return -1;
5214
5215 p2p->min_disc_int = min_disc_int;
5216 p2p->max_disc_int = max_disc_int;
5217 p2p->max_disc_tu = max_disc_tu;
5218 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
5219 min_disc_int, max_disc_int, max_disc_tu);
5220
5221 return 0;
5222 }
5223
5224
p2p_dbg(struct p2p_data * p2p,const char * fmt,...)5225 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
5226 {
5227 va_list ap;
5228 char buf[500];
5229
5230 if (!p2p->cfg->debug_print)
5231 return;
5232
5233 va_start(ap, fmt);
5234 vsnprintf(buf, sizeof(buf), fmt, ap);
5235 buf[sizeof(buf) - 1] = '\0';
5236 va_end(ap);
5237 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
5238 }
5239
5240
p2p_info(struct p2p_data * p2p,const char * fmt,...)5241 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
5242 {
5243 va_list ap;
5244 char buf[500];
5245
5246 if (!p2p->cfg->debug_print)
5247 return;
5248
5249 va_start(ap, fmt);
5250 vsnprintf(buf, sizeof(buf), fmt, ap);
5251 buf[sizeof(buf) - 1] = '\0';
5252 va_end(ap);
5253 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
5254 }
5255
5256
p2p_err(struct p2p_data * p2p,const char * fmt,...)5257 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
5258 {
5259 va_list ap;
5260 char buf[500];
5261
5262 if (!p2p->cfg->debug_print)
5263 return;
5264
5265 va_start(ap, fmt);
5266 vsnprintf(buf, sizeof(buf), fmt, ap);
5267 buf[sizeof(buf) - 1] = '\0';
5268 va_end(ap);
5269 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
5270 }
5271
5272
p2p_loop_on_known_peers(struct p2p_data * p2p,void (* peer_callback)(struct p2p_peer_info * peer,void * user_data),void * user_data)5273 void p2p_loop_on_known_peers(struct p2p_data *p2p,
5274 void (*peer_callback)(struct p2p_peer_info *peer,
5275 void *user_data),
5276 void *user_data)
5277 {
5278 struct p2p_device *dev, *n;
5279
5280 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
5281 peer_callback(&dev->info, user_data);
5282 }
5283 }
5284
5285
5286 #ifdef CONFIG_WPS_NFC
5287
p2p_build_nfc_handover(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5288 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
5289 int client_freq,
5290 const u8 *go_dev_addr,
5291 const u8 *ssid, size_t ssid_len)
5292 {
5293 struct wpabuf *buf;
5294 u8 op_class, channel;
5295 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
5296
5297 buf = wpabuf_alloc(1000);
5298 if (buf == NULL)
5299 return NULL;
5300
5301 op_class = p2p->cfg->reg_class;
5302 channel = p2p->cfg->channel;
5303
5304 p2p_buf_add_capability(buf, p2p->dev_capab &
5305 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
5306 p2p_buf_add_device_info(buf, p2p, NULL);
5307
5308 if (p2p->num_groups > 0) {
5309 int freq = p2p_group_get_freq(p2p->groups[0]);
5310 role = P2P_GO_IN_A_GROUP;
5311 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
5312 p2p_dbg(p2p,
5313 "Unknown GO operating frequency %d MHz for NFC handover",
5314 freq);
5315 wpabuf_free(buf);
5316 return NULL;
5317 }
5318 } else if (client_freq > 0) {
5319 role = P2P_CLIENT_IN_A_GROUP;
5320 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
5321 p2p_dbg(p2p,
5322 "Unknown client operating frequency %d MHz for NFC handover",
5323 client_freq);
5324 wpabuf_free(buf);
5325 return NULL;
5326 }
5327 }
5328
5329 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
5330 channel, role);
5331
5332 if (p2p->num_groups > 0) {
5333 /* Limit number of clients to avoid very long message */
5334 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
5335 p2p_group_buf_add_id(p2p->groups[0], buf);
5336 } else if (client_freq > 0 &&
5337 go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
5338 ssid && ssid_len > 0) {
5339 /*
5340 * Add the optional P2P Group ID to indicate in which group this
5341 * device is a P2P Client.
5342 */
5343 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
5344 }
5345
5346 return buf;
5347 }
5348
5349
p2p_build_nfc_handover_req(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5350 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
5351 int client_freq,
5352 const u8 *go_dev_addr,
5353 const u8 *ssid, size_t ssid_len)
5354 {
5355 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5356 ssid_len);
5357 }
5358
5359
p2p_build_nfc_handover_sel(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5360 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
5361 int client_freq,
5362 const u8 *go_dev_addr,
5363 const u8 *ssid, size_t ssid_len)
5364 {
5365 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5366 ssid_len);
5367 }
5368
5369
p2p_process_nfc_connection_handover(struct p2p_data * p2p,struct p2p_nfc_params * params)5370 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
5371 struct p2p_nfc_params *params)
5372 {
5373 struct p2p_message msg;
5374 struct p2p_device *dev;
5375 const u8 *p2p_dev_addr;
5376 int freq;
5377 enum p2p_role_indication role;
5378
5379 params->next_step = NO_ACTION;
5380
5381 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
5382 params->p2p_attr, params->p2p_len, &msg)) {
5383 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
5384 p2p_parse_free(&msg);
5385 return -1;
5386 }
5387
5388 if (msg.p2p_device_addr)
5389 p2p_dev_addr = msg.p2p_device_addr;
5390 else if (msg.device_id)
5391 p2p_dev_addr = msg.device_id;
5392 else {
5393 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
5394 p2p_parse_free(&msg);
5395 return -1;
5396 }
5397
5398 if (msg.oob_dev_password) {
5399 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
5400 msg.oob_dev_password_len);
5401 params->oob_dev_pw_len = msg.oob_dev_password_len;
5402 }
5403
5404 dev = p2p_create_device(p2p, p2p_dev_addr);
5405 if (dev == NULL) {
5406 p2p_parse_free(&msg);
5407 return -1;
5408 }
5409
5410 params->peer = &dev->info;
5411
5412 os_get_reltime(&dev->last_seen);
5413 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
5414 p2p_copy_wps_info(p2p, dev, 0, &msg);
5415
5416 if (!msg.oob_go_neg_channel) {
5417 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
5418 p2p_parse_free(&msg);
5419 return -1;
5420 }
5421
5422 if (msg.oob_go_neg_channel[3] == 0 &&
5423 msg.oob_go_neg_channel[4] == 0)
5424 freq = 0;
5425 else
5426 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
5427 msg.oob_go_neg_channel[4]);
5428 if (freq < 0) {
5429 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
5430 p2p_parse_free(&msg);
5431 return -1;
5432 }
5433 role = msg.oob_go_neg_channel[5];
5434
5435 if (role == P2P_GO_IN_A_GROUP) {
5436 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
5437 params->go_freq = freq;
5438 } else if (role == P2P_CLIENT_IN_A_GROUP) {
5439 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
5440 freq);
5441 params->go_freq = freq;
5442 } else
5443 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
5444 dev->oob_go_neg_freq = freq;
5445
5446 if (!params->sel && role != P2P_GO_IN_A_GROUP) {
5447 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
5448 p2p->cfg->channel);
5449 if (freq < 0) {
5450 p2p_dbg(p2p, "Own listen channel not known");
5451 p2p_parse_free(&msg);
5452 return -1;
5453 }
5454 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
5455 dev->oob_go_neg_freq = freq;
5456 }
5457
5458 if (msg.group_id) {
5459 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
5460 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
5461 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
5462 params->go_ssid_len);
5463 }
5464
5465 if (dev->flags & P2P_DEV_USER_REJECTED) {
5466 p2p_dbg(p2p, "Do not report rejected device");
5467 p2p_parse_free(&msg);
5468 return 0;
5469 }
5470
5471 if (!(dev->flags & P2P_DEV_REPORTED)) {
5472 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
5473 !(dev->flags & P2P_DEV_REPORTED_ONCE));
5474 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
5475 }
5476 p2p_parse_free(&msg);
5477
5478 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
5479 params->next_step = BOTH_GO;
5480 else if (role == P2P_GO_IN_A_GROUP)
5481 params->next_step = JOIN_GROUP;
5482 else if (role == P2P_CLIENT_IN_A_GROUP) {
5483 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
5484 params->next_step = PEER_CLIENT;
5485 } else if (p2p->num_groups > 0)
5486 params->next_step = AUTH_JOIN;
5487 else if (params->sel)
5488 params->next_step = INIT_GO_NEG;
5489 else
5490 params->next_step = RESP_GO_NEG;
5491
5492 return 0;
5493 }
5494
5495
p2p_set_authorized_oob_dev_pw_id(struct p2p_data * p2p,u16 dev_pw_id,int go_intent,const u8 * own_interface_addr)5496 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
5497 int go_intent,
5498 const u8 *own_interface_addr)
5499 {
5500
5501 p2p->authorized_oob_dev_pw_id = dev_pw_id;
5502 if (dev_pw_id == 0) {
5503 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
5504 return;
5505 }
5506
5507 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
5508 dev_pw_id);
5509
5510 p2p->go_intent = go_intent;
5511 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
5512 }
5513
5514 #endif /* CONFIG_WPS_NFC */
5515
5516
p2p_set_passphrase_len(struct p2p_data * p2p,unsigned int len)5517 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
5518 {
5519 if (len < 8 || len > 63)
5520 return -1;
5521 p2p->cfg->passphrase_len = len;
5522 return 0;
5523 }
5524
5525
p2p_set_vendor_elems(struct p2p_data * p2p,struct wpabuf ** vendor_elem)5526 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
5527 {
5528 p2p->vendor_elem = vendor_elem;
5529 }
5530
5531
p2p_go_neg_wait_timeout(void * eloop_ctx,void * timeout_ctx)5532 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
5533 {
5534 struct p2p_data *p2p = eloop_ctx;
5535
5536 p2p_dbg(p2p,
5537 "Timeout on waiting peer to become ready for GO Negotiation");
5538 p2p_go_neg_failed(p2p, -1);
5539 }
5540
5541
p2p_set_own_pref_freq_list(struct p2p_data * p2p,const unsigned int * pref_freq_list,unsigned int size)5542 void p2p_set_own_pref_freq_list(struct p2p_data *p2p,
5543 const unsigned int *pref_freq_list,
5544 unsigned int size)
5545 {
5546 unsigned int i;
5547
5548 if (size > P2P_MAX_PREF_CHANNELS)
5549 size = P2P_MAX_PREF_CHANNELS;
5550 p2p->num_pref_freq = size;
5551 for (i = 0; i < size; i++) {
5552 p2p->pref_freq_list[i] = pref_freq_list[i];
5553 p2p_dbg(p2p, "Own preferred frequency list[%u]=%u MHz",
5554 i, p2p->pref_freq_list[i]);
5555 }
5556 }
5557
5558
p2p_set_override_pref_op_chan(struct p2p_data * p2p,u8 op_class,u8 chan)5559 void p2p_set_override_pref_op_chan(struct p2p_data *p2p, u8 op_class,
5560 u8 chan)
5561 {
5562 p2p->override_pref_op_class = op_class;
5563 p2p->override_pref_channel = chan;
5564 }
5565
5566
p2p_build_probe_resp_template(struct p2p_data * p2p,unsigned int freq)5567 struct wpabuf * p2p_build_probe_resp_template(struct p2p_data *p2p,
5568 unsigned int freq)
5569 {
5570 struct wpabuf *ies, *buf;
5571 u8 addr[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
5572 int ret;
5573
5574 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
5575 if (!ies) {
5576 wpa_printf(MSG_ERROR,
5577 "CTRL: Failed to build Probe Response IEs");
5578 return NULL;
5579 }
5580
5581 buf = wpabuf_alloc(200 + wpabuf_len(ies));
5582 if (!buf) {
5583 wpabuf_free(ies);
5584 return NULL;
5585 }
5586
5587 ret = p2p_build_probe_resp_buf(p2p, buf, ies, addr, freq);
5588 wpabuf_free(ies);
5589 if (ret) {
5590 wpabuf_free(buf);
5591 return NULL;
5592 }
5593
5594 return buf;
5595 }
5596
5597
p2p_is_peer_6ghz_capab(struct p2p_data * p2p,const u8 * addr)5598 bool p2p_is_peer_6ghz_capab(struct p2p_data *p2p, const u8 *addr)
5599 {
5600 struct p2p_device *dev;
5601
5602 dev = p2p_get_device(p2p, addr);
5603 if (!dev)
5604 return false;
5605
5606 return !!(dev->info.dev_capab & P2P_DEV_CAPAB_6GHZ_BAND_CAPABLE);
5607 }
5608
5609
p2p_set_6ghz_dev_capab(struct p2p_data * p2p,bool allow_6ghz)5610 void p2p_set_6ghz_dev_capab(struct p2p_data *p2p, bool allow_6ghz)
5611 {
5612 p2p->p2p_6ghz_capable = allow_6ghz;
5613 p2p->allow_6ghz = allow_6ghz;
5614 p2p_dbg(p2p, "Set 6 GHz capability to %d", allow_6ghz);
5615
5616 if (allow_6ghz)
5617 p2p->dev_capab |= P2P_DEV_CAPAB_6GHZ_BAND_CAPABLE;
5618 else
5619 p2p->dev_capab &= ~P2P_DEV_CAPAB_6GHZ_BAND_CAPABLE;
5620 }
5621
5622
is_p2p_6ghz_capable(struct p2p_data * p2p)5623 bool is_p2p_6ghz_capable(struct p2p_data *p2p)
5624 {
5625 return p2p->p2p_6ghz_capable;
5626 }
5627
5628
p2p_wfd_enabled(struct p2p_data * p2p)5629 bool p2p_wfd_enabled(struct p2p_data *p2p)
5630 {
5631 #ifdef CONFIG_WIFI_DISPLAY
5632 return p2p->wfd_ie_probe_req != NULL;
5633 #else /* CONFIG_WIFI_DISPLAY */
5634 return false;
5635 #endif /* CONFIG_WIFI_DISPLAY */
5636 }
5637
5638
p2p_peer_wfd_enabled(struct p2p_data * p2p,const u8 * peer_addr)5639 bool p2p_peer_wfd_enabled(struct p2p_data *p2p, const u8 *peer_addr)
5640 {
5641 #ifdef CONFIG_WIFI_DISPLAY
5642 struct p2p_device *dev;
5643
5644 dev = p2p_get_device(p2p, peer_addr);
5645 return dev && dev->info.wfd_subelems != NULL;
5646 #else /* CONFIG_WIFI_DISPLAY */
5647 return false;
5648 #endif /* CONFIG_WIFI_DISPLAY */
5649 }
5650
5651
is_p2p_allow_6ghz(struct p2p_data * p2p)5652 bool is_p2p_allow_6ghz(struct p2p_data *p2p)
5653 {
5654 return p2p->allow_6ghz;
5655 }
5656
5657
set_p2p_allow_6ghz(struct p2p_data * p2p,bool value)5658 void set_p2p_allow_6ghz(struct p2p_data *p2p, bool value)
5659 {
5660 p2p->allow_6ghz = value;
5661 }
5662