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