1 /*
2 * Wi-Fi Direct - P2P module
3 * Copyright (c) 2009-2010, Atheros Communications
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "eloop.h"
13 #include "common/defs.h"
14 #include "common/ieee802_11_defs.h"
15 #include "common/ieee802_11_common.h"
16 #include "common/wpa_ctrl.h"
17 #include "crypto/sha256.h"
18 #include "crypto/crypto.h"
19 #include "wps/wps_i.h"
20 #include "p2p_i.h"
21 #include "p2p.h"
22
23
24 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
25 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
26 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
27 const u8 *sa, const u8 *data, size_t len,
28 int rx_freq);
29 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
30 const u8 *sa, const u8 *data,
31 size_t len);
32 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
33 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
34
35
36 /*
37 * p2p_scan recovery timeout
38 *
39 * Many drivers are using 30 second timeout on scan results. Allow a bit larger
40 * timeout for this to avoid hitting P2P timeout unnecessarily.
41 */
42 #define P2P_SCAN_TIMEOUT 35
43
44 /**
45 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
46 * entries will be removed
47 */
48 #ifndef P2P_PEER_EXPIRATION_AGE
49 #define P2P_PEER_EXPIRATION_AGE 60
50 #endif /* P2P_PEER_EXPIRATION_AGE */
51
52
p2p_expire_peers(struct p2p_data * p2p)53 void p2p_expire_peers(struct p2p_data *p2p)
54 {
55 struct p2p_device *dev, *n;
56 struct os_reltime now;
57 size_t i;
58
59 os_get_reltime(&now);
60 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
61 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
62 continue;
63
64 if (dev == p2p->go_neg_peer) {
65 /*
66 * GO Negotiation is in progress with the peer, so
67 * don't expire the peer entry until GO Negotiation
68 * fails or times out.
69 */
70 continue;
71 }
72
73 if (p2p->cfg->go_connected &&
74 p2p->cfg->go_connected(p2p->cfg->cb_ctx,
75 dev->info.p2p_device_addr)) {
76 /*
77 * We are connected as a client to a group in which the
78 * peer is the GO, so do not expire the peer entry.
79 */
80 os_get_reltime(&dev->last_seen);
81 continue;
82 }
83
84 for (i = 0; i < p2p->num_groups; i++) {
85 if (p2p_group_is_client_connected(
86 p2p->groups[i], dev->info.p2p_device_addr))
87 break;
88 }
89 if (i < p2p->num_groups) {
90 /*
91 * The peer is connected as a client in a group where
92 * we are the GO, so do not expire the peer entry.
93 */
94 os_get_reltime(&dev->last_seen);
95 continue;
96 }
97
98 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
99 MAC2STR(dev->info.p2p_device_addr));
100 dl_list_del(&dev->list);
101 p2p_device_free(p2p, dev);
102 }
103 }
104
105
p2p_state_txt(int state)106 static const char * p2p_state_txt(int state)
107 {
108 switch (state) {
109 case P2P_IDLE:
110 return "IDLE";
111 case P2P_SEARCH:
112 return "SEARCH";
113 case P2P_CONNECT:
114 return "CONNECT";
115 case P2P_CONNECT_LISTEN:
116 return "CONNECT_LISTEN";
117 case P2P_GO_NEG:
118 return "GO_NEG";
119 case P2P_LISTEN_ONLY:
120 return "LISTEN_ONLY";
121 case P2P_WAIT_PEER_CONNECT:
122 return "WAIT_PEER_CONNECT";
123 case P2P_WAIT_PEER_IDLE:
124 return "WAIT_PEER_IDLE";
125 case P2P_SD_DURING_FIND:
126 return "SD_DURING_FIND";
127 case P2P_PROVISIONING:
128 return "PROVISIONING";
129 case P2P_PD_DURING_FIND:
130 return "PD_DURING_FIND";
131 case P2P_INVITE:
132 return "INVITE";
133 case P2P_INVITE_LISTEN:
134 return "INVITE_LISTEN";
135 default:
136 return "?";
137 }
138 }
139
140
p2p_get_state_txt(struct p2p_data * p2p)141 const char * p2p_get_state_txt(struct p2p_data *p2p)
142 {
143 return p2p_state_txt(p2p->state);
144 }
145
146
p2p_get_p2ps_adv_list(struct p2p_data * p2p)147 struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p)
148 {
149 return p2p ? p2p->p2ps_adv_list : NULL;
150 }
151
152
p2p_set_intended_addr(struct p2p_data * p2p,const u8 * intended_addr)153 void p2p_set_intended_addr(struct p2p_data *p2p, const u8 *intended_addr)
154 {
155 if (p2p && intended_addr)
156 os_memcpy(p2p->intended_addr, intended_addr, ETH_ALEN);
157 }
158
159
p2p_get_provisioning_info(struct p2p_data * p2p,const u8 * addr)160 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
161 {
162 struct p2p_device *dev = NULL;
163
164 if (!addr || !p2p)
165 return 0;
166
167 dev = p2p_get_device(p2p, addr);
168 if (dev)
169 return dev->wps_prov_info;
170 else
171 return 0;
172 }
173
174
p2p_clear_provisioning_info(struct p2p_data * p2p,const u8 * addr)175 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
176 {
177 struct p2p_device *dev = NULL;
178
179 if (!addr || !p2p)
180 return;
181
182 dev = p2p_get_device(p2p, addr);
183 if (dev)
184 dev->wps_prov_info = 0;
185 }
186
187
p2p_set_state(struct p2p_data * p2p,int new_state)188 void p2p_set_state(struct p2p_data *p2p, int new_state)
189 {
190 p2p_dbg(p2p, "State %s -> %s",
191 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
192 p2p->state = new_state;
193
194 if (new_state == P2P_IDLE && p2p->pending_channel) {
195 p2p_dbg(p2p, "Apply change in listen channel");
196 p2p->cfg->reg_class = p2p->pending_reg_class;
197 p2p->cfg->channel = p2p->pending_channel;
198 p2p->pending_reg_class = 0;
199 p2p->pending_channel = 0;
200 }
201 }
202
203
p2p_set_timeout(struct p2p_data * p2p,unsigned int sec,unsigned int usec)204 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
205 {
206 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
207 p2p_state_txt(p2p->state), sec, usec);
208 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
209 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
210 }
211
212
p2p_clear_timeout(struct p2p_data * p2p)213 void p2p_clear_timeout(struct p2p_data *p2p)
214 {
215 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
216 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
217 }
218
219
p2p_go_neg_failed(struct p2p_data * p2p,int status)220 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
221 {
222 struct p2p_go_neg_results res;
223 struct p2p_device *peer = p2p->go_neg_peer;
224
225 if (!peer)
226 return;
227
228 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
229 if (p2p->state != P2P_SEARCH) {
230 /*
231 * Clear timeouts related to GO Negotiation if no new p2p_find
232 * has been started.
233 */
234 p2p_clear_timeout(p2p);
235 p2p_set_state(p2p, P2P_IDLE);
236 }
237
238 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
239 peer->wps_method = WPS_NOT_READY;
240 peer->oob_pw_id = 0;
241 wpabuf_free(peer->go_neg_conf);
242 peer->go_neg_conf = NULL;
243 p2p->go_neg_peer = NULL;
244
245 os_memset(&res, 0, sizeof(res));
246 res.status = status;
247 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
248 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
249 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
250 }
251
252
p2p_listen_in_find(struct p2p_data * p2p,int dev_disc)253 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
254 {
255 unsigned int r, tu;
256 int freq;
257 struct wpabuf *ies;
258
259 p2p_dbg(p2p, "Starting short listen state (state=%s)",
260 p2p_state_txt(p2p->state));
261
262 if (p2p->pending_listen_freq) {
263 /* We have a pending p2p_listen request */
264 p2p_dbg(p2p, "p2p_listen command pending already");
265 return;
266 }
267
268 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
269 if (freq < 0) {
270 p2p_dbg(p2p, "Unknown regulatory class/channel");
271 return;
272 }
273
274 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
275 r = 0;
276 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
277 p2p->min_disc_int) * 100;
278 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
279 tu = p2p->max_disc_tu;
280 if (!dev_disc && tu < 100)
281 tu = 100; /* Need to wait in non-device discovery use cases */
282 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
283 tu = p2p->cfg->max_listen * 1000 / 1024;
284
285 if (tu == 0) {
286 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
287 p2p_set_timeout(p2p, 0, 0);
288 return;
289 }
290
291 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
292 if (ies == NULL)
293 return;
294
295 p2p->pending_listen_freq = freq;
296 p2p->pending_listen_sec = 0;
297 p2p->pending_listen_usec = 1024 * tu;
298
299 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
300 ies) < 0) {
301 p2p_dbg(p2p, "Failed to start listen mode");
302 p2p->pending_listen_freq = 0;
303 }
304 wpabuf_free(ies);
305 }
306
307
p2p_listen(struct p2p_data * p2p,unsigned int timeout)308 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
309 {
310 int freq;
311 struct wpabuf *ies;
312
313 p2p_dbg(p2p, "Going to listen(only) state");
314
315 if (p2p->pending_listen_freq) {
316 /* We have a pending p2p_listen request */
317 p2p_dbg(p2p, "p2p_listen command pending already");
318 return -1;
319 }
320
321 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
322 if (freq < 0) {
323 p2p_dbg(p2p, "Unknown regulatory class/channel");
324 return -1;
325 }
326
327 p2p->pending_listen_sec = timeout / 1000;
328 p2p->pending_listen_usec = (timeout % 1000) * 1000;
329
330 if (p2p->p2p_scan_running) {
331 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
332 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
333 return 0;
334 }
335 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
336 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
337 return 0;
338 }
339
340 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
341 if (ies == NULL)
342 return -1;
343
344 p2p->pending_listen_freq = freq;
345
346 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
347 p2p_dbg(p2p, "Failed to start listen mode");
348 p2p->pending_listen_freq = 0;
349 wpabuf_free(ies);
350 return -1;
351 }
352 wpabuf_free(ies);
353
354 p2p_set_state(p2p, P2P_LISTEN_ONLY);
355
356 return 0;
357 }
358
359
p2p_device_clear_reported(struct p2p_data * p2p)360 static void p2p_device_clear_reported(struct p2p_data *p2p)
361 {
362 struct p2p_device *dev;
363 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
364 dev->flags &= ~P2P_DEV_REPORTED;
365 dev->sd_reqs = 0;
366 }
367 }
368
369
370 /**
371 * p2p_get_device - Fetch a peer entry
372 * @p2p: P2P module context from p2p_init()
373 * @addr: P2P Device Address of the peer
374 * Returns: Pointer to the device entry or %NULL if not found
375 */
p2p_get_device(struct p2p_data * p2p,const u8 * addr)376 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
377 {
378 struct p2p_device *dev;
379 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
380 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
381 return dev;
382 }
383 return NULL;
384 }
385
386
387 /**
388 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
389 * @p2p: P2P module context from p2p_init()
390 * @addr: P2P Interface Address of the peer
391 * Returns: Pointer to the device entry or %NULL if not found
392 */
p2p_get_device_interface(struct p2p_data * p2p,const u8 * addr)393 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
394 const u8 *addr)
395 {
396 struct p2p_device *dev;
397 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
398 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
399 return dev;
400 }
401 return NULL;
402 }
403
404
405 /**
406 * p2p_create_device - Create a peer entry
407 * @p2p: P2P module context from p2p_init()
408 * @addr: P2P Device Address of the peer
409 * Returns: Pointer to the device entry or %NULL on failure
410 *
411 * If there is already an entry for the peer, it will be returned instead of
412 * creating a new one.
413 */
p2p_create_device(struct p2p_data * p2p,const u8 * addr)414 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
415 const u8 *addr)
416 {
417 struct p2p_device *dev, *oldest = NULL;
418 size_t count = 0;
419
420 dev = p2p_get_device(p2p, addr);
421 if (dev)
422 return dev;
423
424 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
425 count++;
426 if (oldest == NULL ||
427 os_reltime_before(&dev->last_seen, &oldest->last_seen))
428 oldest = dev;
429 }
430 if (count + 1 > p2p->cfg->max_peers && oldest) {
431 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
432 dl_list_del(&oldest->list);
433 p2p_device_free(p2p, oldest);
434 }
435
436 dev = os_zalloc(sizeof(*dev));
437 if (dev == NULL)
438 return NULL;
439 dl_list_add(&p2p->devices, &dev->list);
440 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
441
442 return dev;
443 }
444
445
p2p_copy_client_info(struct p2p_device * dev,struct p2p_client_info * cli)446 static void p2p_copy_client_info(struct p2p_device *dev,
447 struct p2p_client_info *cli)
448 {
449 p2p_copy_filter_devname(dev->info.device_name,
450 sizeof(dev->info.device_name),
451 cli->dev_name, cli->dev_name_len);
452 dev->info.dev_capab = cli->dev_capab;
453 dev->info.config_methods = cli->config_methods;
454 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
455 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
456 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
457 dev->info.wps_sec_dev_type_list_len);
458 }
459
460
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)461 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
462 const u8 *go_interface_addr, int freq,
463 const u8 *gi, size_t gi_len,
464 struct os_reltime *rx_time)
465 {
466 struct p2p_group_info info;
467 size_t c;
468 struct p2p_device *dev;
469
470 if (gi == NULL)
471 return 0;
472
473 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
474 return -1;
475
476 /*
477 * Clear old data for this group; if the devices are still in the
478 * group, the information will be restored in the loop following this.
479 */
480 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
481 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
482 ETH_ALEN) == 0) {
483 os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
484 os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
485 }
486 }
487
488 for (c = 0; c < info.num_clients; c++) {
489 struct p2p_client_info *cli = &info.client[c];
490 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
491 ETH_ALEN) == 0)
492 continue; /* ignore our own entry */
493 dev = p2p_get_device(p2p, cli->p2p_device_addr);
494 if (dev) {
495 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
496 P2P_DEV_PROBE_REQ_ONLY)) {
497 /*
498 * Update information since we have not
499 * received this directly from the client.
500 */
501 p2p_copy_client_info(dev, cli);
502 } else {
503 /*
504 * Need to update P2P Client Discoverability
505 * flag since it is valid only in P2P Group
506 * Info attribute.
507 */
508 dev->info.dev_capab &=
509 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
510 dev->info.dev_capab |=
511 cli->dev_capab &
512 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
513 }
514 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
515 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
516 }
517 } else {
518 dev = p2p_create_device(p2p, cli->p2p_device_addr);
519 if (dev == NULL)
520 continue;
521 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
522 p2p_copy_client_info(dev, cli);
523 dev->oper_freq = freq;
524 p2p->cfg->dev_found(p2p->cfg->cb_ctx,
525 dev->info.p2p_device_addr,
526 &dev->info, 1);
527 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
528 }
529
530 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
531 ETH_ALEN);
532 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
533 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
534 os_memcpy(dev->member_in_go_iface, go_interface_addr,
535 ETH_ALEN);
536 dev->flags |= P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT;
537 }
538
539 return 0;
540 }
541
542
p2p_copy_wps_info(struct p2p_data * p2p,struct p2p_device * dev,int probe_req,const struct p2p_message * msg)543 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
544 int probe_req, const struct p2p_message *msg)
545 {
546 os_memcpy(dev->info.device_name, msg->device_name,
547 sizeof(dev->info.device_name));
548
549 if (msg->manufacturer &&
550 msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
551 os_memset(dev->info.manufacturer, 0,
552 sizeof(dev->info.manufacturer));
553 os_memcpy(dev->info.manufacturer, msg->manufacturer,
554 msg->manufacturer_len);
555 }
556
557 if (msg->model_name &&
558 msg->model_name_len < sizeof(dev->info.model_name)) {
559 os_memset(dev->info.model_name, 0,
560 sizeof(dev->info.model_name));
561 os_memcpy(dev->info.model_name, msg->model_name,
562 msg->model_name_len);
563 }
564
565 if (msg->model_number &&
566 msg->model_number_len < sizeof(dev->info.model_number)) {
567 os_memset(dev->info.model_number, 0,
568 sizeof(dev->info.model_number));
569 os_memcpy(dev->info.model_number, msg->model_number,
570 msg->model_number_len);
571 }
572
573 if (msg->serial_number &&
574 msg->serial_number_len < sizeof(dev->info.serial_number)) {
575 os_memset(dev->info.serial_number, 0,
576 sizeof(dev->info.serial_number));
577 os_memcpy(dev->info.serial_number, msg->serial_number,
578 msg->serial_number_len);
579 }
580
581 if (msg->pri_dev_type)
582 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
583 sizeof(dev->info.pri_dev_type));
584 else if (msg->wps_pri_dev_type)
585 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
586 sizeof(dev->info.pri_dev_type));
587
588 if (msg->wps_sec_dev_type_list) {
589 os_memcpy(dev->info.wps_sec_dev_type_list,
590 msg->wps_sec_dev_type_list,
591 msg->wps_sec_dev_type_list_len);
592 dev->info.wps_sec_dev_type_list_len =
593 msg->wps_sec_dev_type_list_len;
594 }
595
596 if (msg->capability) {
597 /*
598 * P2P Client Discoverability bit is reserved in all frames
599 * that use this function, so do not change its value here.
600 */
601 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
602 dev->info.dev_capab |= msg->capability[0] &
603 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
604 dev->info.group_capab = msg->capability[1];
605 }
606
607 if (msg->ext_listen_timing) {
608 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
609 dev->ext_listen_interval =
610 WPA_GET_LE16(msg->ext_listen_timing + 2);
611 }
612
613 if (!probe_req) {
614 u16 new_config_methods;
615 new_config_methods = msg->config_methods ?
616 msg->config_methods : msg->wps_config_methods;
617 if (new_config_methods &&
618 dev->info.config_methods != new_config_methods) {
619 p2p_dbg(p2p, "Update peer " MACSTR
620 " config_methods 0x%x -> 0x%x",
621 MAC2STR(dev->info.p2p_device_addr),
622 dev->info.config_methods,
623 new_config_methods);
624 dev->info.config_methods = new_config_methods;
625 }
626 }
627 }
628
629
p2p_update_peer_vendor_elems(struct p2p_device * dev,const u8 * ies,size_t ies_len)630 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
631 size_t ies_len)
632 {
633 const u8 *pos, *end;
634 u8 id, len;
635
636 wpabuf_free(dev->info.vendor_elems);
637 dev->info.vendor_elems = NULL;
638
639 end = ies + ies_len;
640
641 for (pos = ies; end - pos > 1; pos += len) {
642 id = *pos++;
643 len = *pos++;
644
645 if (len > end - pos)
646 break;
647
648 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
649 continue;
650
651 if (len >= 4) {
652 u32 type = WPA_GET_BE32(pos);
653
654 if (type == WPA_IE_VENDOR_TYPE ||
655 type == WMM_IE_VENDOR_TYPE ||
656 type == WPS_IE_VENDOR_TYPE ||
657 type == P2P_IE_VENDOR_TYPE ||
658 type == WFD_IE_VENDOR_TYPE)
659 continue;
660 }
661
662 /* Unknown vendor element - make raw IE data available */
663 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
664 break;
665 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
666 }
667 }
668
669
p2p_compare_wfd_info(struct p2p_device * dev,const struct p2p_message * msg)670 static int p2p_compare_wfd_info(struct p2p_device *dev,
671 const struct p2p_message *msg)
672 {
673 if (dev->info.wfd_subelems && msg->wfd_subelems) {
674 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
675 return 1;
676
677 return os_memcmp(dev->info.wfd_subelems->buf,
678 msg->wfd_subelems->buf,
679 dev->info.wfd_subelems->used);
680 }
681 if (dev->info.wfd_subelems || msg->wfd_subelems)
682 return 1;
683
684 return 0;
685 }
686
687
688 /**
689 * p2p_add_device - Add peer entries based on scan results or P2P frames
690 * @p2p: P2P module context from p2p_init()
691 * @addr: Source address of Beacon or Probe Response frame (may be either
692 * P2P Device Address or P2P Interface Address)
693 * @level: Signal level (signal strength of the received frame from the peer)
694 * @freq: Frequency on which the Beacon or Probe Response frame was received
695 * @rx_time: Time when the result was received
696 * @ies: IEs from the Beacon or Probe Response frame
697 * @ies_len: Length of ies buffer in octets
698 * @scan_res: Whether this was based on scan results
699 * Returns: 0 on success, -1 on failure
700 *
701 * If the scan result is for a GO, the clients in the group will also be added
702 * to the peer table. This function can also be used with some other frames
703 * like Provision Discovery Request that contains P2P Capability and P2P Device
704 * Info attributes.
705 */
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)706 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
707 struct os_reltime *rx_time, int level, const u8 *ies,
708 size_t ies_len, int scan_res)
709 {
710 struct p2p_device *dev;
711 struct p2p_message msg;
712 const u8 *p2p_dev_addr;
713 int wfd_changed;
714 int i;
715 struct os_reltime time_now;
716
717 os_memset(&msg, 0, sizeof(msg));
718 if (p2p_parse_ies(ies, ies_len, &msg)) {
719 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
720 p2p_parse_free(&msg);
721 return -1;
722 }
723
724 if (msg.p2p_device_addr)
725 p2p_dev_addr = msg.p2p_device_addr;
726 else if (msg.device_id)
727 p2p_dev_addr = msg.device_id;
728 else {
729 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
730 p2p_parse_free(&msg);
731 return -1;
732 }
733
734 if (!is_zero_ether_addr(p2p->peer_filter) &&
735 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
736 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
737 " due to peer filter", MAC2STR(p2p_dev_addr));
738 p2p_parse_free(&msg);
739 return 0;
740 }
741
742 dev = p2p_create_device(p2p, p2p_dev_addr);
743 if (dev == NULL) {
744 p2p_parse_free(&msg);
745 return -1;
746 }
747
748 if (rx_time == NULL) {
749 os_get_reltime(&time_now);
750 rx_time = &time_now;
751 }
752
753 /*
754 * Update the device entry only if the new peer
755 * entry is newer than the one previously stored, or if
756 * the device was previously seen as a P2P Client in a group
757 * and the new entry isn't older than a threshold.
758 */
759 if (dev->last_seen.sec > 0 &&
760 os_reltime_before(rx_time, &dev->last_seen) &&
761 (!(dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT) ||
762 os_reltime_expired(&dev->last_seen, rx_time,
763 P2P_DEV_GROUP_CLIENT_RESP_THRESHOLD))) {
764 p2p_dbg(p2p,
765 "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u flags=0x%x)",
766 (unsigned int) rx_time->sec,
767 (unsigned int) rx_time->usec,
768 (unsigned int) dev->last_seen.sec,
769 (unsigned int) dev->last_seen.usec,
770 dev->flags);
771 p2p_parse_free(&msg);
772 return -1;
773 }
774
775 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
776
777 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY |
778 P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT);
779
780 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
781 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
782 if (msg.ssid &&
783 msg.ssid[1] <= sizeof(dev->oper_ssid) &&
784 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
785 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
786 != 0)) {
787 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
788 dev->oper_ssid_len = msg.ssid[1];
789 }
790
791 if (msg.adv_service_instance && msg.adv_service_instance_len) {
792 wpabuf_free(dev->info.p2ps_instance);
793 dev->info.p2ps_instance = wpabuf_alloc_copy(
794 msg.adv_service_instance, msg.adv_service_instance_len);
795 }
796
797 if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
798 *msg.ds_params >= 1 && *msg.ds_params <= 14) {
799 int ds_freq;
800 if (*msg.ds_params == 14)
801 ds_freq = 2484;
802 else
803 ds_freq = 2407 + *msg.ds_params * 5;
804 if (freq != ds_freq) {
805 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
806 freq, ds_freq);
807 freq = ds_freq;
808 }
809 }
810
811 if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
812 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
813 MACSTR " %d -> %d MHz (DS param %d)",
814 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
815 freq, msg.ds_params ? *msg.ds_params : -1);
816 }
817 if (scan_res) {
818 dev->listen_freq = freq;
819 if (msg.group_info)
820 dev->oper_freq = freq;
821 }
822 dev->info.level = level;
823
824 p2p_copy_wps_info(p2p, dev, 0, &msg);
825
826 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
827 wpabuf_free(dev->info.wps_vendor_ext[i]);
828 dev->info.wps_vendor_ext[i] = NULL;
829 }
830
831 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
832 if (msg.wps_vendor_ext[i] == NULL)
833 break;
834 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
835 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
836 if (dev->info.wps_vendor_ext[i] == NULL)
837 break;
838 }
839
840 wfd_changed = p2p_compare_wfd_info(dev, &msg);
841
842 if (msg.wfd_subelems) {
843 wpabuf_free(dev->info.wfd_subelems);
844 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
845 }
846
847 if (scan_res) {
848 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
849 msg.group_info, msg.group_info_len,
850 rx_time);
851 }
852
853 p2p_parse_free(&msg);
854
855 p2p_update_peer_vendor_elems(dev, ies, ies_len);
856
857 if (dev->flags & P2P_DEV_REPORTED && !wfd_changed &&
858 (!msg.adv_service_instance ||
859 (dev->flags & P2P_DEV_P2PS_REPORTED)))
860 return 0;
861
862 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
863 freq, (unsigned int) rx_time->sec,
864 (unsigned int) rx_time->usec);
865 if (dev->flags & P2P_DEV_USER_REJECTED) {
866 p2p_dbg(p2p, "Do not report rejected device");
867 return 0;
868 }
869
870 if (dev->info.config_methods == 0 &&
871 (freq == 2412 || freq == 2437 || freq == 2462)) {
872 /*
873 * If we have only seen a Beacon frame from a GO, we do not yet
874 * know what WPS config methods it supports. Since some
875 * applications use config_methods value from P2P-DEVICE-FOUND
876 * events, postpone reporting this peer until we've fully
877 * discovered its capabilities.
878 *
879 * At least for now, do this only if the peer was detected on
880 * one of the social channels since that peer can be easily be
881 * found again and there are no limitations of having to use
882 * passive scan on this channels, so this can be done through
883 * Probe Response frame that includes the config_methods
884 * information.
885 */
886 p2p_dbg(p2p, "Do not report peer " MACSTR
887 " with unknown config methods", MAC2STR(addr));
888 return 0;
889 }
890
891 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
892 !(dev->flags & P2P_DEV_REPORTED_ONCE));
893 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
894
895 if (msg.adv_service_instance)
896 dev->flags |= P2P_DEV_P2PS_REPORTED;
897
898 return 0;
899 }
900
901
p2p_device_free(struct p2p_data * p2p,struct p2p_device * dev)902 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
903 {
904 int i;
905
906 if (p2p->go_neg_peer == dev) {
907 /*
908 * If GO Negotiation is in progress, report that it has failed.
909 */
910 p2p_go_neg_failed(p2p, -1);
911 }
912 if (p2p->invite_peer == dev)
913 p2p->invite_peer = NULL;
914 if (p2p->sd_peer == dev)
915 p2p->sd_peer = NULL;
916 if (p2p->pending_client_disc_go == dev)
917 p2p->pending_client_disc_go = NULL;
918
919 /* dev_lost() device, but only if it was previously dev_found() */
920 if (dev->flags & P2P_DEV_REPORTED_ONCE)
921 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
922 dev->info.p2p_device_addr);
923
924 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
925 wpabuf_free(dev->info.wps_vendor_ext[i]);
926 dev->info.wps_vendor_ext[i] = NULL;
927 }
928
929 wpabuf_free(dev->info.wfd_subelems);
930 wpabuf_free(dev->info.vendor_elems);
931 wpabuf_free(dev->go_neg_conf);
932 wpabuf_free(dev->info.p2ps_instance);
933
934 os_free(dev);
935 }
936
937
p2p_get_next_prog_freq(struct p2p_data * p2p)938 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
939 {
940 struct p2p_channels *c;
941 struct p2p_reg_class *cla;
942 size_t cl, ch;
943 int found = 0;
944 u8 reg_class;
945 u8 channel;
946 int freq;
947
948 c = &p2p->cfg->channels;
949 for (cl = 0; cl < c->reg_classes; cl++) {
950 cla = &c->reg_class[cl];
951 if (cla->reg_class != p2p->last_prog_scan_class)
952 continue;
953 for (ch = 0; ch < cla->channels; ch++) {
954 if (cla->channel[ch] == p2p->last_prog_scan_chan) {
955 found = 1;
956 break;
957 }
958 }
959 if (found)
960 break;
961 }
962
963 if (!found) {
964 /* Start from beginning */
965 reg_class = c->reg_class[0].reg_class;
966 channel = c->reg_class[0].channel[0];
967 } else {
968 /* Pick the next channel */
969 ch++;
970 if (ch == cla->channels) {
971 cl++;
972 if (cl == c->reg_classes)
973 cl = 0;
974 ch = 0;
975 }
976 reg_class = c->reg_class[cl].reg_class;
977 channel = c->reg_class[cl].channel[ch];
978 }
979
980 freq = p2p_channel_to_freq(reg_class, channel);
981 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
982 reg_class, channel, freq);
983 p2p->last_prog_scan_class = reg_class;
984 p2p->last_prog_scan_chan = channel;
985
986 if (freq == 2412 || freq == 2437 || freq == 2462)
987 return 0; /* No need to add social channels */
988 return freq;
989 }
990
991
p2p_search(struct p2p_data * p2p)992 static void p2p_search(struct p2p_data *p2p)
993 {
994 int freq = 0;
995 enum p2p_scan_type type;
996 u16 pw_id = DEV_PW_DEFAULT;
997 int res;
998
999 if (p2p->drv_in_listen) {
1000 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
1001 return;
1002 }
1003 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1004
1005 if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
1006 (freq = p2p_get_next_prog_freq(p2p)) > 0) {
1007 type = P2P_SCAN_SOCIAL_PLUS_ONE;
1008 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
1009 } else {
1010 type = P2P_SCAN_SOCIAL;
1011 p2p_dbg(p2p, "Starting search");
1012 }
1013
1014 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
1015 p2p->num_req_dev_types, p2p->req_dev_types,
1016 p2p->find_dev_id, pw_id);
1017 if (res < 0) {
1018 p2p_dbg(p2p, "Scan request schedule failed");
1019 p2p_continue_find(p2p);
1020 }
1021 }
1022
1023
p2p_find_timeout(void * eloop_ctx,void * timeout_ctx)1024 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
1025 {
1026 struct p2p_data *p2p = eloop_ctx;
1027 p2p_dbg(p2p, "Find timeout -> stop");
1028 p2p_stop_find(p2p);
1029 }
1030
1031
p2p_notify_scan_trigger_status(struct p2p_data * p2p,int status)1032 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
1033 {
1034 if (status != 0) {
1035 p2p_dbg(p2p, "Scan request failed");
1036 /* Do continue find even for the first p2p_find_scan */
1037 p2p_continue_find(p2p);
1038 } else {
1039 p2p_dbg(p2p, "Running p2p_scan");
1040 p2p->p2p_scan_running = 1;
1041 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1042 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1043 p2p, NULL);
1044 }
1045 }
1046
1047
p2p_run_after_scan(struct p2p_data * p2p)1048 static int p2p_run_after_scan(struct p2p_data *p2p)
1049 {
1050 struct p2p_device *dev;
1051 enum p2p_after_scan op;
1052
1053 if (p2p->after_scan_tx) {
1054 p2p->after_scan_tx_in_progress = 1;
1055 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1056 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1057 p2p->after_scan_tx->freq,
1058 p2p->after_scan_tx->dst,
1059 p2p->after_scan_tx->src,
1060 p2p->after_scan_tx->bssid,
1061 (u8 *) (p2p->after_scan_tx + 1),
1062 p2p->after_scan_tx->len,
1063 p2p->after_scan_tx->wait_time);
1064 os_free(p2p->after_scan_tx);
1065 p2p->after_scan_tx = NULL;
1066 return 1;
1067 }
1068
1069 op = p2p->start_after_scan;
1070 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1071 switch (op) {
1072 case P2P_AFTER_SCAN_NOTHING:
1073 break;
1074 case P2P_AFTER_SCAN_LISTEN:
1075 p2p_dbg(p2p, "Start previously requested Listen state");
1076 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1077 p2p->pending_listen_usec / 1000);
1078 return 1;
1079 case P2P_AFTER_SCAN_CONNECT:
1080 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1081 MAC2STR(p2p->after_scan_peer));
1082 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1083 if (dev == NULL) {
1084 p2p_dbg(p2p, "Peer not known anymore");
1085 break;
1086 }
1087 p2p_connect_send(p2p, dev);
1088 return 1;
1089 }
1090
1091 return 0;
1092 }
1093
1094
p2p_scan_timeout(void * eloop_ctx,void * timeout_ctx)1095 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1096 {
1097 struct p2p_data *p2p = eloop_ctx;
1098 int running;
1099 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1100 running = p2p->p2p_scan_running;
1101 /* Make sure we recover from missed scan results callback */
1102 p2p->p2p_scan_running = 0;
1103
1104 if (running)
1105 p2p_run_after_scan(p2p);
1106 }
1107
1108
p2p_free_req_dev_types(struct p2p_data * p2p)1109 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1110 {
1111 p2p->num_req_dev_types = 0;
1112 os_free(p2p->req_dev_types);
1113 p2p->req_dev_types = NULL;
1114 }
1115
1116
p2ps_gen_hash(struct p2p_data * p2p,const char * str,u8 * hash)1117 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash)
1118 {
1119 u8 buf[SHA256_MAC_LEN];
1120 char str_buf[256];
1121 const u8 *adv_array;
1122 size_t i, adv_len;
1123
1124 if (!str || !hash)
1125 return 0;
1126
1127 if (!str[0]) {
1128 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1129 return 1;
1130 }
1131
1132 adv_array = (u8 *) str_buf;
1133 adv_len = os_strlen(str);
1134 if (adv_len >= sizeof(str_buf))
1135 return 0;
1136
1137 for (i = 0; i < adv_len; i++) {
1138 if (str[i] >= 'A' && str[i] <= 'Z')
1139 str_buf[i] = str[i] - 'A' + 'a';
1140 else
1141 str_buf[i] = str[i];
1142 }
1143
1144 if (sha256_vector(1, &adv_array, &adv_len, buf))
1145 return 0;
1146
1147 os_memcpy(hash, buf, P2PS_HASH_LEN);
1148 return 1;
1149 }
1150
1151
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)1152 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1153 enum p2p_discovery_type type,
1154 unsigned int num_req_dev_types, const u8 *req_dev_types,
1155 const u8 *dev_id, unsigned int search_delay,
1156 u8 seek_count, const char **seek, int freq)
1157 {
1158 int res;
1159
1160 p2p_dbg(p2p, "Starting find (type=%d)", type);
1161 os_get_reltime(&p2p->find_start);
1162 if (p2p->p2p_scan_running) {
1163 p2p_dbg(p2p, "p2p_scan is already running");
1164 }
1165
1166 p2p_free_req_dev_types(p2p);
1167 if (req_dev_types && num_req_dev_types) {
1168 p2p->req_dev_types = os_malloc(num_req_dev_types *
1169 WPS_DEV_TYPE_LEN);
1170 if (p2p->req_dev_types == NULL)
1171 return -1;
1172 os_memcpy(p2p->req_dev_types, req_dev_types,
1173 num_req_dev_types * WPS_DEV_TYPE_LEN);
1174 p2p->num_req_dev_types = num_req_dev_types;
1175 }
1176
1177 if (dev_id) {
1178 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1179 p2p->find_dev_id = p2p->find_dev_id_buf;
1180 } else
1181 p2p->find_dev_id = NULL;
1182
1183 if (seek_count == 0 || !seek) {
1184 /* Not an ASP search */
1185 p2p->p2ps_seek = 0;
1186 } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) {
1187 /*
1188 * An empty seek string means no hash values, but still an ASP
1189 * search.
1190 */
1191 p2p_dbg(p2p, "ASP search");
1192 p2p->p2ps_seek_count = 0;
1193 p2p->p2ps_seek = 1;
1194 } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
1195 u8 buf[P2PS_HASH_LEN];
1196 int i, count = 0;
1197
1198 for (i = 0; i < seek_count; i++) {
1199 if (!p2ps_gen_hash(p2p, seek[i], buf))
1200 continue;
1201
1202 p2p_dbg(p2p, "Seek service %s hash " MACSTR,
1203 seek[i], MAC2STR(buf));
1204 os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN],
1205 buf, P2PS_HASH_LEN);
1206 count++;
1207 }
1208
1209 p2p->p2ps_seek_count = count;
1210 p2p->p2ps_seek = 1;
1211 } else {
1212 p2p->p2ps_seek_count = 0;
1213 p2p->p2ps_seek = 1;
1214 }
1215
1216 /* Special case to perform wildcard search */
1217 if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
1218 p2p->p2ps_seek_count = 1;
1219 os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash,
1220 P2PS_HASH_LEN);
1221 }
1222
1223 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1224 p2p_clear_timeout(p2p);
1225 if (p2p->pending_listen_freq) {
1226 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_find");
1227 p2p->pending_listen_freq = 0;
1228 }
1229 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1230 p2p->find_type = type;
1231 p2p_device_clear_reported(p2p);
1232 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN);
1233 p2p_set_state(p2p, P2P_SEARCH);
1234 p2p->search_delay = search_delay;
1235 p2p->in_search_delay = 0;
1236 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1237 p2p->last_p2p_find_timeout = timeout;
1238 if (timeout)
1239 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1240 p2p, NULL);
1241 switch (type) {
1242 case P2P_FIND_START_WITH_FULL:
1243 if (freq > 0) {
1244 /*
1245 * Start with the specified channel and then move to
1246 * social channels only scans.
1247 */
1248 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx,
1249 P2P_SCAN_SPECIFIC, freq,
1250 p2p->num_req_dev_types,
1251 p2p->req_dev_types, dev_id,
1252 DEV_PW_DEFAULT);
1253 break;
1254 }
1255 /* fall through */
1256 case P2P_FIND_PROGRESSIVE:
1257 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1258 p2p->num_req_dev_types,
1259 p2p->req_dev_types, dev_id,
1260 DEV_PW_DEFAULT);
1261 break;
1262 case P2P_FIND_ONLY_SOCIAL:
1263 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1264 p2p->num_req_dev_types,
1265 p2p->req_dev_types, dev_id,
1266 DEV_PW_DEFAULT);
1267 break;
1268 default:
1269 return -1;
1270 }
1271
1272 if (res != 0 && p2p->p2p_scan_running) {
1273 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1274 /* wait for the previous p2p_scan to complete */
1275 res = 0; /* do not report failure */
1276 } else if (res != 0) {
1277 p2p_dbg(p2p, "Failed to start p2p_scan");
1278 p2p_set_state(p2p, P2P_IDLE);
1279 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1280 }
1281
1282 return res;
1283 }
1284
1285
p2p_stop_find_for_freq(struct p2p_data * p2p,int freq)1286 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1287 {
1288 p2p_dbg(p2p, "Stopping find");
1289 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1290 p2p_clear_timeout(p2p);
1291 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
1292 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1293
1294 p2p->p2ps_seek_count = 0;
1295
1296 p2p_set_state(p2p, P2P_IDLE);
1297 p2p_free_req_dev_types(p2p);
1298 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1299 if (p2p->go_neg_peer)
1300 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1301 p2p->go_neg_peer = NULL;
1302 p2p->sd_peer = NULL;
1303 p2p->invite_peer = NULL;
1304 p2p_stop_listen_for_freq(p2p, freq);
1305 p2p->send_action_in_progress = 0;
1306 }
1307
1308
p2p_stop_listen_for_freq(struct p2p_data * p2p,int freq)1309 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1310 {
1311 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1312 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1313 return;
1314 }
1315 if (p2p->in_listen) {
1316 p2p->in_listen = 0;
1317 p2p_clear_timeout(p2p);
1318 }
1319 if (p2p->drv_in_listen) {
1320 /*
1321 * The driver may not deliver callback to p2p_listen_end()
1322 * when the operation gets canceled, so clear the internal
1323 * variable that is tracking driver state.
1324 */
1325 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1326 p2p->drv_in_listen = 0;
1327 }
1328 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1329 }
1330
1331
p2p_stop_listen(struct p2p_data * p2p)1332 void p2p_stop_listen(struct p2p_data *p2p)
1333 {
1334 if (p2p->state != P2P_LISTEN_ONLY) {
1335 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1336 return;
1337 }
1338
1339 p2p_stop_listen_for_freq(p2p, 0);
1340 p2p_set_state(p2p, P2P_IDLE);
1341 }
1342
1343
p2p_stop_find(struct p2p_data * p2p)1344 void p2p_stop_find(struct p2p_data *p2p)
1345 {
1346 p2p->pending_listen_freq = 0;
1347 p2p_stop_find_for_freq(p2p, 0);
1348 }
1349
1350
p2p_prepare_channel_pref(struct p2p_data * p2p,unsigned int force_freq,unsigned int pref_freq,int go)1351 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1352 unsigned int force_freq,
1353 unsigned int pref_freq, int go)
1354 {
1355 u8 op_class, op_channel;
1356 unsigned int freq = force_freq ? force_freq : pref_freq;
1357
1358 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1359 force_freq, pref_freq, go);
1360 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1361 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1362 return -1;
1363 }
1364
1365 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1366 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1367 op_channel))) {
1368 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1369 freq, op_class, op_channel);
1370 return -1;
1371 }
1372
1373 p2p->op_reg_class = op_class;
1374 p2p->op_channel = op_channel;
1375
1376 if (force_freq) {
1377 p2p->channels.reg_classes = 1;
1378 p2p->channels.reg_class[0].channels = 1;
1379 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1380 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1381 } else {
1382 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1383 sizeof(struct p2p_channels));
1384 }
1385
1386 return 0;
1387 }
1388
1389
p2p_prepare_channel_best(struct p2p_data * p2p)1390 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1391 {
1392 u8 op_class, op_channel;
1393 const int op_classes_5ghz[] = { 124, 125, 115, 0 };
1394 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1395 const int op_classes_vht[] = { 128, 0 };
1396
1397 p2p_dbg(p2p, "Prepare channel best");
1398
1399 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1400 p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1401 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1402 == 0) {
1403 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1404 p2p->op_reg_class = op_class;
1405 p2p->op_channel = op_channel;
1406 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1407 p2p_supported_freq(p2p, p2p->best_freq_5) &&
1408 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1409 == 0) {
1410 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1411 p2p->op_reg_class = op_class;
1412 p2p->op_channel = op_channel;
1413 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1414 p2p_supported_freq(p2p, p2p->best_freq_24) &&
1415 p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1416 &op_channel) == 0) {
1417 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1418 p2p->op_reg_class = op_class;
1419 p2p->op_channel = op_channel;
1420 } else if (p2p->cfg->num_pref_chan > 0 &&
1421 p2p_channels_includes(&p2p->cfg->channels,
1422 p2p->cfg->pref_chan[0].op_class,
1423 p2p->cfg->pref_chan[0].chan)) {
1424 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1425 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1426 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1427 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1428 &p2p->op_reg_class, &p2p->op_channel) ==
1429 0) {
1430 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1431 p2p->op_reg_class, p2p->op_channel);
1432 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1433 &p2p->op_reg_class, &p2p->op_channel) ==
1434 0) {
1435 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1436 p2p->op_reg_class, p2p->op_channel);
1437 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1438 &p2p->op_reg_class, &p2p->op_channel) ==
1439 0) {
1440 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1441 p2p->op_reg_class, p2p->op_channel);
1442 } else if (p2p_channels_includes(&p2p->cfg->channels,
1443 p2p->cfg->op_reg_class,
1444 p2p->cfg->op_channel)) {
1445 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1446 p2p->op_reg_class = p2p->cfg->op_reg_class;
1447 p2p->op_channel = p2p->cfg->op_channel;
1448 } else if (p2p_channel_random_social(&p2p->cfg->channels,
1449 &p2p->op_reg_class,
1450 &p2p->op_channel) == 0) {
1451 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1452 p2p->op_reg_class, p2p->op_channel);
1453 } else {
1454 /* Select any random available channel from the first available
1455 * operating class */
1456 p2p_channel_select(&p2p->cfg->channels, NULL,
1457 &p2p->op_reg_class,
1458 &p2p->op_channel);
1459 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1460 p2p->op_channel, p2p->op_reg_class);
1461 }
1462
1463 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1464 sizeof(struct p2p_channels));
1465 }
1466
1467
1468 /**
1469 * p2p_prepare_channel - Select operating channel for GO Negotiation or P2PS PD
1470 * @p2p: P2P module context from p2p_init()
1471 * @dev: Selected peer device
1472 * @force_freq: Forced frequency in MHz or 0 if not forced
1473 * @pref_freq: Preferred frequency in MHz or 0 if no preference
1474 * @go: Whether the local end will be forced to be GO
1475 * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1476 *
1477 * This function is used to do initial operating channel selection for GO
1478 * Negotiation prior to having received peer information or for P2PS PD
1479 * signalling. The selected channel may be further optimized in
1480 * p2p_reselect_channel() once the peer information is available.
1481 */
p2p_prepare_channel(struct p2p_data * p2p,struct p2p_device * dev,unsigned int force_freq,unsigned int pref_freq,int go)1482 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1483 unsigned int force_freq, unsigned int pref_freq, int go)
1484 {
1485 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1486 force_freq, pref_freq, go);
1487 if (force_freq || pref_freq) {
1488 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1489 0)
1490 return -1;
1491 } else {
1492 p2p_prepare_channel_best(p2p);
1493 }
1494 p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1495 if (go)
1496 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1497 else if (!force_freq)
1498 p2p_channels_union_inplace(&p2p->channels,
1499 &p2p->cfg->cli_channels);
1500 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1501
1502 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1503 p2p->op_reg_class, p2p->op_channel,
1504 force_freq ? " (forced)" : "");
1505
1506 if (force_freq)
1507 dev->flags |= P2P_DEV_FORCE_FREQ;
1508 else
1509 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1510
1511 return 0;
1512 }
1513
1514
p2p_set_dev_persistent(struct p2p_device * dev,int persistent_group)1515 static void p2p_set_dev_persistent(struct p2p_device *dev,
1516 int persistent_group)
1517 {
1518 switch (persistent_group) {
1519 case 0:
1520 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1521 P2P_DEV_PREFER_PERSISTENT_RECONN);
1522 break;
1523 case 1:
1524 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1525 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1526 break;
1527 case 2:
1528 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1529 P2P_DEV_PREFER_PERSISTENT_RECONN;
1530 break;
1531 }
1532 }
1533
1534
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)1535 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1536 enum p2p_wps_method wps_method,
1537 int go_intent, const u8 *own_interface_addr,
1538 unsigned int force_freq, int persistent_group,
1539 const u8 *force_ssid, size_t force_ssid_len,
1540 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1541 {
1542 struct p2p_device *dev;
1543
1544 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1545 " GO Intent=%d Intended Interface Address=" MACSTR
1546 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1547 "oob_pw_id=%u",
1548 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1549 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1550
1551 dev = p2p_get_device(p2p, peer_addr);
1552 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1553 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1554 MAC2STR(peer_addr));
1555 return -1;
1556 }
1557
1558 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1559 go_intent == 15) < 0)
1560 return -1;
1561
1562 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1563 if (!(dev->info.dev_capab &
1564 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1565 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1566 " that is in a group and is not discoverable",
1567 MAC2STR(peer_addr));
1568 return -1;
1569 }
1570 if (dev->oper_freq <= 0) {
1571 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1572 " with incomplete information",
1573 MAC2STR(peer_addr));
1574 return -1;
1575 }
1576
1577 /*
1578 * First, try to connect directly. If the peer does not
1579 * acknowledge frames, assume it is sleeping and use device
1580 * discoverability via the GO at that point.
1581 */
1582 }
1583
1584 p2p->ssid_set = 0;
1585 if (force_ssid) {
1586 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1587 force_ssid, force_ssid_len);
1588 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1589 p2p->ssid_len = force_ssid_len;
1590 p2p->ssid_set = 1;
1591 }
1592
1593 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1594 dev->flags &= ~P2P_DEV_USER_REJECTED;
1595 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1596 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1597 if (pd_before_go_neg)
1598 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1599 else {
1600 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1601 /*
1602 * Assign dialog token and tie breaker here to use the same
1603 * values in each retry within the same GO Negotiation exchange.
1604 */
1605 dev->dialog_token++;
1606 if (dev->dialog_token == 0)
1607 dev->dialog_token = 1;
1608 dev->tie_breaker = p2p->next_tie_breaker;
1609 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1610 }
1611 dev->connect_reqs = 0;
1612 dev->go_neg_req_sent = 0;
1613 dev->go_state = UNKNOWN_GO;
1614 p2p_set_dev_persistent(dev, persistent_group);
1615 p2p->go_intent = go_intent;
1616 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1617
1618 if (p2p->state != P2P_IDLE)
1619 p2p_stop_find(p2p);
1620
1621 if (p2p->after_scan_tx) {
1622 /*
1623 * We need to drop the pending frame to avoid issues with the
1624 * new GO Negotiation, e.g., when the pending frame was from a
1625 * previous attempt at starting a GO Negotiation.
1626 */
1627 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1628 os_free(p2p->after_scan_tx);
1629 p2p->after_scan_tx = NULL;
1630 }
1631
1632 dev->wps_method = wps_method;
1633 dev->oob_pw_id = oob_pw_id;
1634 dev->status = P2P_SC_SUCCESS;
1635
1636 if (p2p->p2p_scan_running) {
1637 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1638 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1639 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1640 return 0;
1641 }
1642 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1643
1644 return p2p_connect_send(p2p, dev);
1645 }
1646
1647
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)1648 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1649 enum p2p_wps_method wps_method,
1650 int go_intent, const u8 *own_interface_addr,
1651 unsigned int force_freq, int persistent_group,
1652 const u8 *force_ssid, size_t force_ssid_len,
1653 unsigned int pref_freq, u16 oob_pw_id)
1654 {
1655 struct p2p_device *dev;
1656
1657 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1658 " GO Intent=%d Intended Interface Address=" MACSTR
1659 " wps_method=%d persistent_group=%d oob_pw_id=%u",
1660 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1661 wps_method, persistent_group, oob_pw_id);
1662
1663 dev = p2p_get_device(p2p, peer_addr);
1664 if (dev == NULL) {
1665 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1666 MAC2STR(peer_addr));
1667 return -1;
1668 }
1669
1670 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1671 15) < 0)
1672 return -1;
1673
1674 p2p->ssid_set = 0;
1675 if (force_ssid) {
1676 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1677 force_ssid, force_ssid_len);
1678 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1679 p2p->ssid_len = force_ssid_len;
1680 p2p->ssid_set = 1;
1681 }
1682
1683 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1684 dev->flags &= ~P2P_DEV_USER_REJECTED;
1685 dev->go_neg_req_sent = 0;
1686 dev->go_state = UNKNOWN_GO;
1687 p2p_set_dev_persistent(dev, persistent_group);
1688 p2p->go_intent = go_intent;
1689 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1690
1691 dev->wps_method = wps_method;
1692 dev->oob_pw_id = oob_pw_id;
1693 dev->status = P2P_SC_SUCCESS;
1694
1695 return 0;
1696 }
1697
1698
p2p_add_dev_info(struct p2p_data * p2p,const u8 * addr,struct p2p_device * dev,struct p2p_message * msg)1699 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1700 struct p2p_device *dev, struct p2p_message *msg)
1701 {
1702 os_get_reltime(&dev->last_seen);
1703
1704 p2p_copy_wps_info(p2p, dev, 0, msg);
1705
1706 if (msg->listen_channel) {
1707 int freq;
1708 freq = p2p_channel_to_freq(msg->listen_channel[3],
1709 msg->listen_channel[4]);
1710 if (freq < 0) {
1711 p2p_dbg(p2p, "Unknown peer Listen channel: "
1712 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1713 msg->listen_channel[0],
1714 msg->listen_channel[1],
1715 msg->listen_channel[2],
1716 msg->listen_channel[3],
1717 msg->listen_channel[4]);
1718 } else {
1719 p2p_dbg(p2p, "Update peer " MACSTR
1720 " Listen channel: %u -> %u MHz",
1721 MAC2STR(dev->info.p2p_device_addr),
1722 dev->listen_freq, freq);
1723 dev->listen_freq = freq;
1724 }
1725 }
1726
1727 if (msg->wfd_subelems) {
1728 wpabuf_free(dev->info.wfd_subelems);
1729 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1730 }
1731
1732 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1733 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1734 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1735 } else {
1736 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1737 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1738 "listen_freq=%d",
1739 MAC2STR(dev->info.p2p_device_addr),
1740 dev->info.dev_capab, dev->info.group_capab,
1741 dev->info.device_name, dev->listen_freq);
1742 }
1743
1744 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1745
1746 if (dev->flags & P2P_DEV_USER_REJECTED) {
1747 p2p_dbg(p2p, "Do not report rejected device");
1748 return;
1749 }
1750
1751 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1752 !(dev->flags & P2P_DEV_REPORTED_ONCE));
1753 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1754 }
1755
1756
p2p_build_ssid(struct p2p_data * p2p,u8 * ssid,size_t * ssid_len)1757 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1758 {
1759 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1760 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1761 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1762 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1763 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1764 }
1765
1766
p2p_go_params(struct p2p_data * p2p,struct p2p_go_neg_results * params)1767 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1768 {
1769 if (p2p->ssid_set) {
1770 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len);
1771 params->ssid_len = p2p->ssid_len;
1772 } else {
1773 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len);
1774 }
1775 p2p->ssid_set = 0;
1776
1777 p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1778 return 0;
1779 }
1780
1781
p2p_go_complete(struct p2p_data * p2p,struct p2p_device * peer)1782 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1783 {
1784 struct p2p_go_neg_results res;
1785 int go = peer->go_state == LOCAL_GO;
1786 struct p2p_channels intersection;
1787
1788 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1789 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1790
1791 os_memset(&res, 0, sizeof(res));
1792 res.role_go = go;
1793 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1794 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1795 res.wps_method = peer->wps_method;
1796 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1797 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1798 res.persistent_group = 2;
1799 else
1800 res.persistent_group = 1;
1801 }
1802
1803 if (go) {
1804 /* Setup AP mode for WPS provisioning */
1805 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1806 p2p->op_channel);
1807 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1808 res.ssid_len = p2p->ssid_len;
1809 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1810 } else {
1811 res.freq = peer->oper_freq;
1812 if (p2p->ssid_len) {
1813 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1814 res.ssid_len = p2p->ssid_len;
1815 }
1816 }
1817
1818 p2p_channels_dump(p2p, "own channels", &p2p->channels);
1819 p2p_channels_dump(p2p, "peer channels", &peer->channels);
1820 p2p_channels_intersect(&p2p->channels, &peer->channels,
1821 &intersection);
1822 if (go) {
1823 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1824 p2p_channels_dump(p2p, "intersection after no-GO removal",
1825 &intersection);
1826 }
1827
1828 p2p_channels_to_freqs(&intersection, res.freq_list,
1829 P2P_MAX_CHANNELS);
1830
1831 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1832
1833 p2p_clear_timeout(p2p);
1834 p2p->ssid_set = 0;
1835 peer->go_neg_req_sent = 0;
1836 peer->wps_method = WPS_NOT_READY;
1837 peer->oob_pw_id = 0;
1838 wpabuf_free(peer->go_neg_conf);
1839 peer->go_neg_conf = NULL;
1840
1841 p2p_set_state(p2p, P2P_PROVISIONING);
1842 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1843 }
1844
1845
p2p_rx_p2p_action(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len,int rx_freq)1846 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1847 const u8 *data, size_t len, int rx_freq)
1848 {
1849 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1850 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1851
1852 if (len < 1)
1853 return;
1854
1855 switch (data[0]) {
1856 case P2P_GO_NEG_REQ:
1857 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1858 break;
1859 case P2P_GO_NEG_RESP:
1860 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1861 break;
1862 case P2P_GO_NEG_CONF:
1863 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1864 break;
1865 case P2P_INVITATION_REQ:
1866 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1867 rx_freq);
1868 break;
1869 case P2P_INVITATION_RESP:
1870 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1871 break;
1872 case P2P_PROV_DISC_REQ:
1873 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1874 break;
1875 case P2P_PROV_DISC_RESP:
1876 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1877 break;
1878 case P2P_DEV_DISC_REQ:
1879 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1880 break;
1881 case P2P_DEV_DISC_RESP:
1882 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1883 break;
1884 default:
1885 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1886 data[0]);
1887 break;
1888 }
1889 }
1890
1891
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)1892 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1893 const u8 *sa, const u8 *bssid, const u8 *data,
1894 size_t len, int freq)
1895 {
1896 if (len < 1)
1897 return;
1898
1899 switch (data[0]) {
1900 case WLAN_PA_VENDOR_SPECIFIC:
1901 data++;
1902 len--;
1903 if (len < 4)
1904 return;
1905 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1906 return;
1907
1908 data += 4;
1909 len -= 4;
1910
1911 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1912 break;
1913 case WLAN_PA_GAS_INITIAL_REQ:
1914 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1915 break;
1916 case WLAN_PA_GAS_INITIAL_RESP:
1917 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1918 break;
1919 case WLAN_PA_GAS_COMEBACK_REQ:
1920 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1921 break;
1922 case WLAN_PA_GAS_COMEBACK_RESP:
1923 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1924 break;
1925 }
1926 }
1927
1928
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)1929 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1930 const u8 *bssid, u8 category,
1931 const u8 *data, size_t len, int freq)
1932 {
1933 if (category == WLAN_ACTION_PUBLIC) {
1934 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1935 return;
1936 }
1937
1938 if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1939 return;
1940
1941 if (len < 4)
1942 return;
1943
1944 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1945 return;
1946 data += 4;
1947 len -= 4;
1948
1949 /* P2P action frame */
1950 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1951 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1952
1953 if (len < 1)
1954 return;
1955 switch (data[0]) {
1956 case P2P_NOA:
1957 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1958 /* TODO */
1959 break;
1960 case P2P_PRESENCE_REQ:
1961 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1962 break;
1963 case P2P_PRESENCE_RESP:
1964 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1965 break;
1966 case P2P_GO_DISC_REQ:
1967 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1968 break;
1969 default:
1970 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1971 break;
1972 }
1973 }
1974
1975
p2p_go_neg_start(void * eloop_ctx,void * timeout_ctx)1976 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1977 {
1978 struct p2p_data *p2p = eloop_ctx;
1979 if (p2p->go_neg_peer == NULL)
1980 return;
1981 if (p2p->pending_listen_freq) {
1982 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1983 p2p->pending_listen_freq = 0;
1984 }
1985 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1986 p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1987 /*
1988 * Set new timeout to make sure a previously set one does not expire
1989 * too quickly while waiting for the GO Negotiation to complete.
1990 */
1991 p2p_set_timeout(p2p, 0, 500000);
1992 p2p_connect_send(p2p, p2p->go_neg_peer);
1993 }
1994
1995
p2p_invite_start(void * eloop_ctx,void * timeout_ctx)1996 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1997 {
1998 struct p2p_data *p2p = eloop_ctx;
1999 if (p2p->invite_peer == NULL)
2000 return;
2001 if (p2p->pending_listen_freq) {
2002 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
2003 p2p->pending_listen_freq = 0;
2004 }
2005 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
2006 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
2007 p2p->invite_dev_pw_id);
2008 }
2009
2010
p2p_add_dev_from_probe_req(struct p2p_data * p2p,const u8 * addr,const u8 * ie,size_t ie_len)2011 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
2012 const u8 *ie, size_t ie_len)
2013 {
2014 struct p2p_message msg;
2015 struct p2p_device *dev;
2016
2017 os_memset(&msg, 0, sizeof(msg));
2018 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
2019 {
2020 p2p_parse_free(&msg);
2021 return; /* not a P2P probe */
2022 }
2023
2024 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
2025 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
2026 != 0) {
2027 /* The Probe Request is not part of P2P Device Discovery. It is
2028 * not known whether the source address of the frame is the P2P
2029 * Device Address or P2P Interface Address. Do not add a new
2030 * peer entry based on this frames.
2031 */
2032 p2p_parse_free(&msg);
2033 return;
2034 }
2035
2036 dev = p2p_get_device(p2p, addr);
2037 if (dev) {
2038 if (msg.listen_channel) {
2039 int freq;
2040
2041 if (dev->country[0] == 0)
2042 os_memcpy(dev->country, msg.listen_channel, 3);
2043
2044 freq = p2p_channel_to_freq(msg.listen_channel[3],
2045 msg.listen_channel[4]);
2046
2047 if (freq > 0 && dev->listen_freq != freq) {
2048 p2p_dbg(p2p,
2049 "Updated peer " MACSTR " Listen channel (Probe Request): %d -> %d MHz",
2050 MAC2STR(addr), dev->listen_freq, freq);
2051 dev->listen_freq = freq;
2052 }
2053 }
2054
2055 os_get_reltime(&dev->last_seen);
2056 p2p_parse_free(&msg);
2057 return; /* already known */
2058 }
2059
2060 dev = p2p_create_device(p2p, addr);
2061 if (dev == NULL) {
2062 p2p_parse_free(&msg);
2063 return;
2064 }
2065
2066 os_get_reltime(&dev->last_seen);
2067 dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
2068
2069 if (msg.listen_channel) {
2070 os_memcpy(dev->country, msg.listen_channel, 3);
2071 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
2072 msg.listen_channel[4]);
2073 }
2074
2075 p2p_copy_wps_info(p2p, dev, 1, &msg);
2076
2077 if (msg.wfd_subelems) {
2078 wpabuf_free(dev->info.wfd_subelems);
2079 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
2080 }
2081
2082 p2p_parse_free(&msg);
2083
2084 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
2085 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
2086 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
2087 dev->info.group_capab, dev->info.device_name,
2088 dev->listen_freq);
2089 }
2090
2091
p2p_add_dev_from_go_neg_req(struct p2p_data * p2p,const u8 * addr,struct p2p_message * msg)2092 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
2093 const u8 *addr,
2094 struct p2p_message *msg)
2095 {
2096 struct p2p_device *dev;
2097
2098 dev = p2p_get_device(p2p, addr);
2099 if (dev) {
2100 os_get_reltime(&dev->last_seen);
2101 return dev; /* already known */
2102 }
2103
2104 dev = p2p_create_device(p2p, addr);
2105 if (dev == NULL)
2106 return NULL;
2107
2108 p2p_add_dev_info(p2p, addr, dev, msg);
2109
2110 return dev;
2111 }
2112
2113
dev_type_match(const u8 * dev_type,const u8 * req_dev_type)2114 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
2115 {
2116 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
2117 return 1;
2118 if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
2119 WPA_GET_BE32(&req_dev_type[2]) == 0 &&
2120 WPA_GET_BE16(&req_dev_type[6]) == 0)
2121 return 1; /* Category match with wildcard OUI/sub-category */
2122 return 0;
2123 }
2124
2125
dev_type_list_match(const u8 * dev_type,const u8 * req_dev_type[],size_t num_req_dev_type)2126 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
2127 size_t num_req_dev_type)
2128 {
2129 size_t i;
2130 for (i = 0; i < num_req_dev_type; i++) {
2131 if (dev_type_match(dev_type, req_dev_type[i]))
2132 return 1;
2133 }
2134 return 0;
2135 }
2136
2137
2138 /**
2139 * p2p_match_dev_type - Match local device type with requested type
2140 * @p2p: P2P module context from p2p_init()
2141 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
2142 * Returns: 1 on match, 0 on mismatch
2143 *
2144 * This function can be used to match the Requested Device Type attribute in
2145 * WPS IE with the local device types for deciding whether to reply to a Probe
2146 * Request frame.
2147 */
p2p_match_dev_type(struct p2p_data * p2p,struct wpabuf * wps)2148 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2149 {
2150 struct wps_parse_attr attr;
2151 size_t i;
2152
2153 if (wps_parse_msg(wps, &attr))
2154 return 1; /* assume no Requested Device Type attributes */
2155
2156 if (attr.num_req_dev_type == 0)
2157 return 1; /* no Requested Device Type attributes -> match */
2158
2159 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2160 attr.num_req_dev_type))
2161 return 1; /* Own Primary Device Type matches */
2162
2163 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2164 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2165 attr.req_dev_type,
2166 attr.num_req_dev_type))
2167 return 1; /* Own Secondary Device Type matches */
2168 }
2169
2170 /* No matching device type found */
2171 return 0;
2172 }
2173
2174
p2p_build_probe_resp_ies(struct p2p_data * p2p,const u8 * query_hash,u8 query_count)2175 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p,
2176 const u8 *query_hash,
2177 u8 query_count)
2178 {
2179 struct wpabuf *buf;
2180 u8 *len;
2181 int pw_id = -1;
2182 size_t extra = 0;
2183
2184 #ifdef CONFIG_WIFI_DISPLAY
2185 if (p2p->wfd_ie_probe_resp)
2186 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2187 #endif /* CONFIG_WIFI_DISPLAY */
2188
2189 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2190 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2191
2192 if (query_count)
2193 extra += MAX_SVC_ADV_IE_LEN;
2194
2195 buf = wpabuf_alloc(1000 + extra);
2196 if (buf == NULL)
2197 return NULL;
2198
2199 if (p2p->go_neg_peer) {
2200 /* Advertise immediate availability of WPS credential */
2201 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2202 }
2203
2204 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2205 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2206 wpabuf_free(buf);
2207 return NULL;
2208 }
2209
2210 #ifdef CONFIG_WIFI_DISPLAY
2211 if (p2p->wfd_ie_probe_resp)
2212 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2213 #endif /* CONFIG_WIFI_DISPLAY */
2214
2215 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2216 wpabuf_put_buf(buf,
2217 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2218
2219 /* P2P IE */
2220 len = p2p_buf_add_ie_hdr(buf);
2221 p2p_buf_add_capability(buf, p2p->dev_capab &
2222 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2223 if (p2p->ext_listen_interval)
2224 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2225 p2p->ext_listen_interval);
2226 p2p_buf_add_device_info(buf, p2p, NULL);
2227 p2p_buf_update_ie_hdr(buf, len);
2228
2229 if (query_count) {
2230 p2p_buf_add_service_instance(buf, p2p, query_count, query_hash,
2231 p2p->p2ps_adv_list);
2232 }
2233
2234 return buf;
2235 }
2236
2237
p2p_service_find_asp(struct p2p_data * p2p,const u8 * hash)2238 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash)
2239 {
2240 struct p2ps_advertisement *adv_data;
2241 int any_wfa;
2242
2243 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list);
2244
2245 /* Wildcard org.wi-fi.wfds matches any WFA spec defined service */
2246 any_wfa = os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0;
2247
2248 adv_data = p2p->p2ps_adv_list;
2249 while (adv_data) {
2250 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0)
2251 return 1; /* exact hash match */
2252 if (any_wfa &&
2253 os_strncmp(adv_data->svc_name, P2PS_WILD_HASH_STR,
2254 os_strlen(P2PS_WILD_HASH_STR)) == 0)
2255 return 1; /* WFA service match */
2256 adv_data = adv_data->next;
2257 }
2258
2259 return 0;
2260 }
2261
2262
2263 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)2264 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2265 const u8 *bssid, const u8 *ie, size_t ie_len,
2266 unsigned int rx_freq)
2267 {
2268 struct ieee802_11_elems elems;
2269 struct wpabuf *buf;
2270 struct ieee80211_mgmt *resp;
2271 struct p2p_message msg;
2272 struct wpabuf *ies;
2273 u8 channel, op_class;
2274
2275 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2276 ParseFailed) {
2277 /* Ignore invalid Probe Request frames */
2278 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2279 return P2P_PREQ_MALFORMED;
2280 }
2281
2282 if (elems.p2p == NULL) {
2283 /* not a P2P probe - ignore it */
2284 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2285 return P2P_PREQ_NOT_P2P;
2286 }
2287
2288 if (dst && !is_broadcast_ether_addr(dst) &&
2289 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2290 /* Not sent to the broadcast address or our P2P Device Address
2291 */
2292 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2293 MAC2STR(dst));
2294 return P2P_PREQ_NOT_PROCESSED;
2295 }
2296
2297 if (bssid && !is_broadcast_ether_addr(bssid)) {
2298 /* Not sent to the Wildcard BSSID */
2299 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2300 MAC2STR(bssid));
2301 return P2P_PREQ_NOT_PROCESSED;
2302 }
2303
2304 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2305 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2306 0) {
2307 /* not using P2P Wildcard SSID - ignore */
2308 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2309 return P2P_PREQ_NOT_PROCESSED;
2310 }
2311
2312 if (supp_rates_11b_only(&elems)) {
2313 /* Indicates support for 11b rates only */
2314 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2315 return P2P_PREQ_NOT_P2P;
2316 }
2317
2318 os_memset(&msg, 0, sizeof(msg));
2319 if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2320 /* Could not parse P2P attributes */
2321 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2322 return P2P_PREQ_NOT_P2P;
2323 }
2324
2325 if (msg.service_hash && msg.service_hash_count) {
2326 const u8 *hash = msg.service_hash;
2327 u8 i;
2328 int p2ps_svc_found = 0;
2329
2330 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",
2331 p2p->in_listen, p2p->drv_in_listen, rx_freq,
2332 p2p->cfg->channel, p2p->pending_listen_freq);
2333
2334 if (!p2p->in_listen && !p2p->drv_in_listen &&
2335 p2p->pending_listen_freq && rx_freq &&
2336 rx_freq != p2p->pending_listen_freq) {
2337 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",
2338 rx_freq, p2p->pending_listen_freq);
2339 p2p_parse_free(&msg);
2340 return P2P_PREQ_NOT_LISTEN;
2341 }
2342
2343 for (i = 0; i < msg.service_hash_count; i++) {
2344 if (p2p_service_find_asp(p2p, hash)) {
2345 p2p_dbg(p2p, "Service Hash match found: "
2346 MACSTR, MAC2STR(hash));
2347 p2ps_svc_found = 1;
2348 break;
2349 }
2350 hash += P2PS_HASH_LEN;
2351 }
2352
2353 /* Probed hash unknown */
2354 if (!p2ps_svc_found) {
2355 p2p_dbg(p2p, "No Service Hash match found");
2356 p2p_parse_free(&msg);
2357 return P2P_PREQ_NOT_PROCESSED;
2358 }
2359 } else {
2360 /* This is not a P2PS Probe Request */
2361 p2p_dbg(p2p, "No P2PS Hash in Probe Request");
2362
2363 if (!p2p->in_listen || !p2p->drv_in_listen) {
2364 /* not in Listen state - ignore Probe Request */
2365 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2366 p2p->in_listen, p2p->drv_in_listen);
2367 p2p_parse_free(&msg);
2368 return P2P_PREQ_NOT_LISTEN;
2369 }
2370 }
2371
2372 if (msg.device_id &&
2373 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2374 /* Device ID did not match */
2375 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2376 MAC2STR(msg.device_id));
2377 p2p_parse_free(&msg);
2378 return P2P_PREQ_NOT_PROCESSED;
2379 }
2380
2381 /* Check Requested Device Type match */
2382 if (msg.wps_attributes &&
2383 !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2384 /* No match with Requested Device Type */
2385 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2386 p2p_parse_free(&msg);
2387 return P2P_PREQ_NOT_PROCESSED;
2388 }
2389
2390 if (!p2p->cfg->send_probe_resp) {
2391 /* Response generated elsewhere */
2392 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2393 p2p_parse_free(&msg);
2394 return P2P_PREQ_NOT_PROCESSED;
2395 }
2396
2397 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2398
2399 /*
2400 * We do not really have a specific BSS that this frame is advertising,
2401 * so build a frame that has some information in valid format. This is
2402 * really only used for discovery purposes, not to learn exact BSS
2403 * parameters.
2404 */
2405 ies = p2p_build_probe_resp_ies(p2p, msg.service_hash,
2406 msg.service_hash_count);
2407 p2p_parse_free(&msg);
2408 if (ies == NULL)
2409 return P2P_PREQ_NOT_PROCESSED;
2410
2411 buf = wpabuf_alloc(200 + wpabuf_len(ies));
2412 if (buf == NULL) {
2413 wpabuf_free(ies);
2414 return P2P_PREQ_NOT_PROCESSED;
2415 }
2416
2417 resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt,
2418 u.probe_resp.variable));
2419
2420 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2421 (WLAN_FC_STYPE_PROBE_RESP << 4));
2422 os_memcpy(resp->da, addr, ETH_ALEN);
2423 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2424 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2425 resp->u.probe_resp.beacon_int = host_to_le16(100);
2426 /* hardware or low-level driver will setup seq_ctrl and timestamp */
2427 resp->u.probe_resp.capab_info =
2428 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2429 WLAN_CAPABILITY_PRIVACY |
2430 WLAN_CAPABILITY_SHORT_SLOT_TIME);
2431
2432 wpabuf_put_u8(buf, WLAN_EID_SSID);
2433 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2434 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2435
2436 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2437 wpabuf_put_u8(buf, 8);
2438 wpabuf_put_u8(buf, (60 / 5) | 0x80);
2439 wpabuf_put_u8(buf, 90 / 5);
2440 wpabuf_put_u8(buf, (120 / 5) | 0x80);
2441 wpabuf_put_u8(buf, 180 / 5);
2442 wpabuf_put_u8(buf, (240 / 5) | 0x80);
2443 wpabuf_put_u8(buf, 360 / 5);
2444 wpabuf_put_u8(buf, 480 / 5);
2445 wpabuf_put_u8(buf, 540 / 5);
2446
2447 if (!rx_freq) {
2448 channel = p2p->cfg->channel;
2449 } else if (p2p_freq_to_channel(rx_freq, &op_class, &channel)) {
2450 wpabuf_free(ies);
2451 wpabuf_free(buf);
2452 return P2P_PREQ_NOT_PROCESSED;
2453 }
2454
2455 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2456 wpabuf_put_u8(buf, 1);
2457 wpabuf_put_u8(buf, channel);
2458
2459 wpabuf_put_buf(buf, ies);
2460 wpabuf_free(ies);
2461
2462 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf, rx_freq);
2463
2464 wpabuf_free(buf);
2465
2466 return P2P_PREQ_PROCESSED;
2467 }
2468
2469
2470 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)2471 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2472 const u8 *bssid, const u8 *ie, size_t ie_len,
2473 unsigned int rx_freq)
2474 {
2475 enum p2p_probe_req_status res;
2476
2477 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2478
2479 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq);
2480 if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED)
2481 return res;
2482
2483 /*
2484 * Activate a pending GO Negotiation/Invite flow if a received Probe
2485 * Request frame is from an expected peer. Some devices may share the
2486 * same address for P2P and non-P2P STA running simultaneously. The
2487 * P2P_PREQ_PROCESSED and P2P_PREQ_NOT_PROCESSED p2p_reply_probe()
2488 * return values verified above ensure we are handling a Probe Request
2489 * frame from a P2P peer.
2490 */
2491 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2492 p2p->go_neg_peer &&
2493 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2494 == 0 &&
2495 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2496 /* Received a Probe Request from GO Negotiation peer */
2497 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2498 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2499 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2500 return res;
2501 }
2502
2503 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2504 p2p->invite_peer &&
2505 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2506 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2507 == 0) {
2508 /* Received a Probe Request from Invite peer */
2509 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2510 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2511 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2512 return res;
2513 }
2514
2515 return res;
2516 }
2517
2518
p2p_assoc_req_ie_wlan_ap(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,struct wpabuf * p2p_ie)2519 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2520 u8 *buf, size_t len, struct wpabuf *p2p_ie)
2521 {
2522 struct wpabuf *tmp;
2523 u8 *lpos;
2524 size_t tmplen;
2525 int res;
2526 u8 group_capab;
2527 struct p2p_message msg;
2528
2529 if (p2p_ie == NULL)
2530 return 0; /* WLAN AP is not a P2P manager */
2531
2532 os_memset(&msg, 0, sizeof(msg));
2533 if (p2p_parse_p2p_ie(p2p_ie, &msg) < 0)
2534 return 0;
2535
2536 p2p_dbg(p2p, "BSS P2P manageability %s",
2537 msg.manageability ? "enabled" : "disabled");
2538
2539 if (!msg.manageability)
2540 return 0;
2541
2542 /*
2543 * (Re)Association Request - P2P IE
2544 * P2P Capability attribute (shall be present)
2545 * P2P Interface attribute (present if concurrent device and
2546 * P2P Management is enabled)
2547 */
2548 tmp = wpabuf_alloc(200);
2549 if (tmp == NULL)
2550 return -1;
2551
2552 lpos = p2p_buf_add_ie_hdr(tmp);
2553 group_capab = 0;
2554 if (p2p->num_groups > 0) {
2555 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2556 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2557 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2558 p2p->cross_connect)
2559 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2560 }
2561 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2562 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2563 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2564 p2p_buf_add_p2p_interface(tmp, p2p);
2565 p2p_buf_update_ie_hdr(tmp, lpos);
2566
2567 tmplen = wpabuf_len(tmp);
2568 if (tmplen > len)
2569 res = -1;
2570 else {
2571 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2572 res = tmplen;
2573 }
2574 wpabuf_free(tmp);
2575
2576 return res;
2577 }
2578
2579
p2p_assoc_req_ie(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,int p2p_group,struct wpabuf * p2p_ie)2580 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2581 size_t len, int p2p_group, struct wpabuf *p2p_ie)
2582 {
2583 struct wpabuf *tmp;
2584 u8 *lpos;
2585 struct p2p_device *peer;
2586 size_t tmplen;
2587 int res;
2588 size_t extra = 0;
2589
2590 if (!p2p_group)
2591 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2592
2593 #ifdef CONFIG_WIFI_DISPLAY
2594 if (p2p->wfd_ie_assoc_req)
2595 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2596 #endif /* CONFIG_WIFI_DISPLAY */
2597
2598 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2599 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2600
2601 /*
2602 * (Re)Association Request - P2P IE
2603 * P2P Capability attribute (shall be present)
2604 * Extended Listen Timing (may be present)
2605 * P2P Device Info attribute (shall be present)
2606 */
2607 tmp = wpabuf_alloc(200 + extra);
2608 if (tmp == NULL)
2609 return -1;
2610
2611 #ifdef CONFIG_WIFI_DISPLAY
2612 if (p2p->wfd_ie_assoc_req)
2613 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2614 #endif /* CONFIG_WIFI_DISPLAY */
2615
2616 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2617 wpabuf_put_buf(tmp,
2618 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2619
2620 peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2621
2622 lpos = p2p_buf_add_ie_hdr(tmp);
2623 p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2624 if (p2p->ext_listen_interval)
2625 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2626 p2p->ext_listen_interval);
2627 p2p_buf_add_device_info(tmp, p2p, peer);
2628 p2p_buf_update_ie_hdr(tmp, lpos);
2629
2630 tmplen = wpabuf_len(tmp);
2631 if (tmplen > len)
2632 res = -1;
2633 else {
2634 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2635 res = tmplen;
2636 }
2637 wpabuf_free(tmp);
2638
2639 return res;
2640 }
2641
2642
p2p_scan_result_text(const u8 * ies,size_t ies_len,char * buf,char * end)2643 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2644 {
2645 struct wpabuf *p2p_ie;
2646 int ret;
2647
2648 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2649 if (p2p_ie == NULL)
2650 return 0;
2651
2652 ret = p2p_attr_text(p2p_ie, buf, end);
2653 wpabuf_free(p2p_ie);
2654 return ret;
2655 }
2656
2657
2658 struct p2ps_advertisement *
p2p_service_p2ps_id(struct p2p_data * p2p,u32 adv_id)2659 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id)
2660 {
2661 struct p2ps_advertisement *adv_data;
2662
2663 if (!p2p)
2664 return NULL;
2665
2666 adv_data = p2p->p2ps_adv_list;
2667 while (adv_data) {
2668 if (adv_data->id == adv_id)
2669 return adv_data;
2670 adv_data = adv_data->next;
2671 }
2672
2673 return NULL;
2674 }
2675
2676
p2p_service_del_asp(struct p2p_data * p2p,u32 adv_id)2677 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id)
2678 {
2679 struct p2ps_advertisement *adv_data;
2680 struct p2ps_advertisement **prior;
2681
2682 if (!p2p)
2683 return -1;
2684
2685 adv_data = p2p->p2ps_adv_list;
2686 prior = &p2p->p2ps_adv_list;
2687 while (adv_data) {
2688 if (adv_data->id == adv_id) {
2689 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id);
2690 *prior = adv_data->next;
2691 os_free(adv_data);
2692 return 0;
2693 }
2694 prior = &adv_data->next;
2695 adv_data = adv_data->next;
2696 }
2697
2698 return -1;
2699 }
2700
2701
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)2702 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id,
2703 const char *adv_str, u8 svc_state, u16 config_methods,
2704 const char *svc_info, const u8 *cpt_priority)
2705 {
2706 struct p2ps_advertisement *adv_data, *tmp, **prev;
2707 u8 buf[P2PS_HASH_LEN];
2708 size_t adv_data_len, adv_len, info_len = 0;
2709 int i;
2710
2711 if (!p2p || !adv_str || !adv_str[0] || !cpt_priority)
2712 return -1;
2713
2714 if (!(config_methods & p2p->cfg->config_methods)) {
2715 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x",
2716 config_methods, p2p->cfg->config_methods);
2717 return -1;
2718 }
2719
2720 if (!p2ps_gen_hash(p2p, adv_str, buf))
2721 return -1;
2722
2723 if (svc_info)
2724 info_len = os_strlen(svc_info);
2725 adv_len = os_strlen(adv_str);
2726 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 +
2727 info_len + 1;
2728
2729 adv_data = os_zalloc(adv_data_len);
2730 if (!adv_data)
2731 return -1;
2732
2733 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN);
2734 adv_data->id = adv_id;
2735 adv_data->state = svc_state;
2736 adv_data->config_methods = config_methods & p2p->cfg->config_methods;
2737 adv_data->auto_accept = (u8) auto_accept;
2738 os_memcpy(adv_data->svc_name, adv_str, adv_len);
2739
2740 for (i = 0; cpt_priority[i] && i < P2PS_FEATURE_CAPAB_CPT_MAX; i++) {
2741 adv_data->cpt_priority[i] = cpt_priority[i];
2742 adv_data->cpt_mask |= cpt_priority[i];
2743 }
2744
2745 if (svc_info && info_len) {
2746 adv_data->svc_info = &adv_data->svc_name[adv_len + 1];
2747 os_memcpy(adv_data->svc_info, svc_info, info_len);
2748 }
2749
2750 /*
2751 * Group Advertisements by service string. They do not need to be
2752 * sorted, but groups allow easier Probe Response instance grouping
2753 */
2754 tmp = p2p->p2ps_adv_list;
2755 prev = &p2p->p2ps_adv_list;
2756 while (tmp) {
2757 if (tmp->id == adv_data->id) {
2758 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) {
2759 os_free(adv_data);
2760 return -1;
2761 }
2762 adv_data->next = tmp->next;
2763 *prev = adv_data;
2764 os_free(tmp);
2765 goto inserted;
2766 } else {
2767 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) {
2768 adv_data->next = tmp->next;
2769 tmp->next = adv_data;
2770 goto inserted;
2771 }
2772 }
2773 prev = &tmp->next;
2774 tmp = tmp->next;
2775 }
2776
2777 /* No svc_name match found */
2778 adv_data->next = p2p->p2ps_adv_list;
2779 p2p->p2ps_adv_list = adv_data;
2780
2781 inserted:
2782 p2p_dbg(p2p,
2783 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s' cpt_mask=0x%x",
2784 adv_id, adv_data->config_methods, svc_state, adv_str,
2785 adv_data->cpt_mask);
2786
2787 return 0;
2788 }
2789
2790
p2p_service_flush_asp(struct p2p_data * p2p)2791 void p2p_service_flush_asp(struct p2p_data *p2p)
2792 {
2793 struct p2ps_advertisement *adv, *prev;
2794
2795 if (!p2p)
2796 return;
2797
2798 adv = p2p->p2ps_adv_list;
2799 while (adv) {
2800 prev = adv;
2801 adv = adv->next;
2802 os_free(prev);
2803 }
2804
2805 p2p->p2ps_adv_list = NULL;
2806 p2p_dbg(p2p, "All ASP advertisements flushed");
2807 }
2808
2809
p2p_parse_dev_addr_in_p2p_ie(struct wpabuf * p2p_ie,u8 * dev_addr)2810 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2811 {
2812 struct p2p_message msg;
2813
2814 os_memset(&msg, 0, sizeof(msg));
2815 if (p2p_parse_p2p_ie(p2p_ie, &msg))
2816 return -1;
2817
2818 if (msg.p2p_device_addr) {
2819 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2820 return 0;
2821 } else if (msg.device_id) {
2822 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2823 return 0;
2824 }
2825 return -1;
2826 }
2827
2828
p2p_parse_dev_addr(const u8 * ies,size_t ies_len,u8 * dev_addr)2829 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2830 {
2831 struct wpabuf *p2p_ie;
2832 int ret;
2833
2834 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2835 P2P_IE_VENDOR_TYPE);
2836 if (p2p_ie == NULL)
2837 return -1;
2838 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2839 wpabuf_free(p2p_ie);
2840 return ret;
2841 }
2842
2843
p2p_clear_go_neg(struct p2p_data * p2p)2844 static void p2p_clear_go_neg(struct p2p_data *p2p)
2845 {
2846 p2p->go_neg_peer = NULL;
2847 p2p_clear_timeout(p2p);
2848 p2p_set_state(p2p, P2P_IDLE);
2849 }
2850
2851
p2p_wps_success_cb(struct p2p_data * p2p,const u8 * mac_addr)2852 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2853 {
2854 if (p2p->go_neg_peer == NULL) {
2855 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2856 return; /* No pending Group Formation */
2857 }
2858
2859 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2860 0) {
2861 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2862 MACSTR " (GO Negotiation peer " MACSTR ")",
2863 MAC2STR(mac_addr),
2864 MAC2STR(p2p->go_neg_peer->intended_addr));
2865 return; /* Ignore unexpected peer address */
2866 }
2867
2868 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2869 MAC2STR(mac_addr));
2870
2871 p2p_clear_go_neg(p2p);
2872 }
2873
2874
p2p_group_formation_failed(struct p2p_data * p2p)2875 void p2p_group_formation_failed(struct p2p_data *p2p)
2876 {
2877 if (p2p->go_neg_peer == NULL) {
2878 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2879 return; /* No pending Group Formation */
2880 }
2881
2882 p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2883 MAC2STR(p2p->go_neg_peer->intended_addr));
2884
2885 p2p_clear_go_neg(p2p);
2886 }
2887
2888
p2p_init(const struct p2p_config * cfg)2889 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2890 {
2891 struct p2p_data *p2p;
2892
2893 if (cfg->max_peers < 1 ||
2894 cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2895 return NULL;
2896
2897 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2898 if (p2p == NULL)
2899 return NULL;
2900 p2p->cfg = (struct p2p_config *) (p2p + 1);
2901 os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2902 if (cfg->dev_name)
2903 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2904 if (cfg->manufacturer)
2905 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2906 if (cfg->model_name)
2907 p2p->cfg->model_name = os_strdup(cfg->model_name);
2908 if (cfg->model_number)
2909 p2p->cfg->model_number = os_strdup(cfg->model_number);
2910 if (cfg->serial_number)
2911 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2912 if (cfg->pref_chan) {
2913 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2914 sizeof(struct p2p_channel));
2915 if (p2p->cfg->pref_chan) {
2916 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2917 cfg->num_pref_chan *
2918 sizeof(struct p2p_channel));
2919 } else
2920 p2p->cfg->num_pref_chan = 0;
2921 }
2922
2923 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);
2924
2925 p2p->min_disc_int = 1;
2926 p2p->max_disc_int = 3;
2927 p2p->max_disc_tu = -1;
2928
2929 if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2930 p2p->next_tie_breaker = 0;
2931 p2p->next_tie_breaker &= 0x01;
2932 if (cfg->sd_request)
2933 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2934 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2935 if (cfg->concurrent_operations)
2936 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2937 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2938
2939 dl_list_init(&p2p->devices);
2940
2941 p2p->go_timeout = 100;
2942 p2p->client_timeout = 20;
2943 p2p->num_p2p_sd_queries = 0;
2944
2945 p2p_dbg(p2p, "initialized");
2946 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2947 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2948
2949 return p2p;
2950 }
2951
2952
p2p_deinit(struct p2p_data * p2p)2953 void p2p_deinit(struct p2p_data *p2p)
2954 {
2955 #ifdef CONFIG_WIFI_DISPLAY
2956 wpabuf_free(p2p->wfd_ie_beacon);
2957 wpabuf_free(p2p->wfd_ie_probe_req);
2958 wpabuf_free(p2p->wfd_ie_probe_resp);
2959 wpabuf_free(p2p->wfd_ie_assoc_req);
2960 wpabuf_free(p2p->wfd_ie_invitation);
2961 wpabuf_free(p2p->wfd_ie_prov_disc_req);
2962 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2963 wpabuf_free(p2p->wfd_ie_go_neg);
2964 wpabuf_free(p2p->wfd_dev_info);
2965 wpabuf_free(p2p->wfd_assoc_bssid);
2966 wpabuf_free(p2p->wfd_coupled_sink_info);
2967 #endif /* CONFIG_WIFI_DISPLAY */
2968
2969 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2970 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2971 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2972 p2p_flush(p2p);
2973 p2p_free_req_dev_types(p2p);
2974 os_free(p2p->cfg->dev_name);
2975 os_free(p2p->cfg->manufacturer);
2976 os_free(p2p->cfg->model_name);
2977 os_free(p2p->cfg->model_number);
2978 os_free(p2p->cfg->serial_number);
2979 os_free(p2p->cfg->pref_chan);
2980 os_free(p2p->groups);
2981 p2ps_prov_free(p2p);
2982 wpabuf_free(p2p->sd_resp);
2983 os_free(p2p->after_scan_tx);
2984 p2p_remove_wps_vendor_extensions(p2p);
2985 os_free(p2p->no_go_freq.range);
2986 p2p_service_flush_asp(p2p);
2987
2988 os_free(p2p);
2989 }
2990
2991
p2p_flush(struct p2p_data * p2p)2992 void p2p_flush(struct p2p_data *p2p)
2993 {
2994 struct p2p_device *dev, *prev;
2995
2996 p2p_ext_listen(p2p, 0, 0);
2997 p2p_stop_find(p2p);
2998 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2999 list) {
3000 dl_list_del(&dev->list);
3001 p2p_device_free(p2p, dev);
3002 }
3003 p2p_free_sd_queries(p2p);
3004 os_free(p2p->after_scan_tx);
3005 p2p->after_scan_tx = NULL;
3006 p2p->ssid_set = 0;
3007 }
3008
3009
p2p_unauthorize(struct p2p_data * p2p,const u8 * addr)3010 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
3011 {
3012 struct p2p_device *dev;
3013
3014 dev = p2p_get_device(p2p, addr);
3015 if (dev == NULL)
3016 return -1;
3017
3018 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
3019
3020 if (p2p->go_neg_peer == dev) {
3021 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
3022 p2p->go_neg_peer = NULL;
3023 }
3024
3025 dev->wps_method = WPS_NOT_READY;
3026 dev->oob_pw_id = 0;
3027 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
3028 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
3029
3030 /* Check if after_scan_tx is for this peer. If so free it */
3031 if (p2p->after_scan_tx &&
3032 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
3033 os_free(p2p->after_scan_tx);
3034 p2p->after_scan_tx = NULL;
3035 }
3036
3037 return 0;
3038 }
3039
3040
p2p_set_dev_name(struct p2p_data * p2p,const char * dev_name)3041 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
3042 {
3043 os_free(p2p->cfg->dev_name);
3044 if (dev_name) {
3045 p2p->cfg->dev_name = os_strdup(dev_name);
3046 if (p2p->cfg->dev_name == NULL)
3047 return -1;
3048 } else
3049 p2p->cfg->dev_name = NULL;
3050 return 0;
3051 }
3052
3053
p2p_set_manufacturer(struct p2p_data * p2p,const char * manufacturer)3054 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
3055 {
3056 os_free(p2p->cfg->manufacturer);
3057 p2p->cfg->manufacturer = NULL;
3058 if (manufacturer) {
3059 p2p->cfg->manufacturer = os_strdup(manufacturer);
3060 if (p2p->cfg->manufacturer == NULL)
3061 return -1;
3062 }
3063
3064 return 0;
3065 }
3066
3067
p2p_set_model_name(struct p2p_data * p2p,const char * model_name)3068 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
3069 {
3070 os_free(p2p->cfg->model_name);
3071 p2p->cfg->model_name = NULL;
3072 if (model_name) {
3073 p2p->cfg->model_name = os_strdup(model_name);
3074 if (p2p->cfg->model_name == NULL)
3075 return -1;
3076 }
3077
3078 return 0;
3079 }
3080
3081
p2p_set_model_number(struct p2p_data * p2p,const char * model_number)3082 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
3083 {
3084 os_free(p2p->cfg->model_number);
3085 p2p->cfg->model_number = NULL;
3086 if (model_number) {
3087 p2p->cfg->model_number = os_strdup(model_number);
3088 if (p2p->cfg->model_number == NULL)
3089 return -1;
3090 }
3091
3092 return 0;
3093 }
3094
3095
p2p_set_serial_number(struct p2p_data * p2p,const char * serial_number)3096 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
3097 {
3098 os_free(p2p->cfg->serial_number);
3099 p2p->cfg->serial_number = NULL;
3100 if (serial_number) {
3101 p2p->cfg->serial_number = os_strdup(serial_number);
3102 if (p2p->cfg->serial_number == NULL)
3103 return -1;
3104 }
3105
3106 return 0;
3107 }
3108
3109
p2p_set_config_methods(struct p2p_data * p2p,u16 config_methods)3110 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
3111 {
3112 p2p->cfg->config_methods = config_methods;
3113 }
3114
3115
p2p_set_uuid(struct p2p_data * p2p,const u8 * uuid)3116 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
3117 {
3118 os_memcpy(p2p->cfg->uuid, uuid, 16);
3119 }
3120
3121
p2p_set_pri_dev_type(struct p2p_data * p2p,const u8 * pri_dev_type)3122 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
3123 {
3124 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
3125 return 0;
3126 }
3127
3128
p2p_set_sec_dev_types(struct p2p_data * p2p,const u8 dev_types[][8],size_t num_dev_types)3129 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
3130 size_t num_dev_types)
3131 {
3132 if (num_dev_types > P2P_SEC_DEVICE_TYPES)
3133 num_dev_types = P2P_SEC_DEVICE_TYPES;
3134 p2p->cfg->num_sec_dev_types = num_dev_types;
3135 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
3136 return 0;
3137 }
3138
3139
p2p_remove_wps_vendor_extensions(struct p2p_data * p2p)3140 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
3141 {
3142 int i;
3143
3144 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3145 wpabuf_free(p2p->wps_vendor_ext[i]);
3146 p2p->wps_vendor_ext[i] = NULL;
3147 }
3148 }
3149
3150
p2p_add_wps_vendor_extension(struct p2p_data * p2p,const struct wpabuf * vendor_ext)3151 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
3152 const struct wpabuf *vendor_ext)
3153 {
3154 int i;
3155
3156 if (vendor_ext == NULL)
3157 return -1;
3158
3159 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3160 if (p2p->wps_vendor_ext[i] == NULL)
3161 break;
3162 }
3163 if (i >= P2P_MAX_WPS_VENDOR_EXT)
3164 return -1;
3165
3166 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
3167 if (p2p->wps_vendor_ext[i] == NULL)
3168 return -1;
3169
3170 return 0;
3171 }
3172
3173
p2p_set_country(struct p2p_data * p2p,const char * country)3174 int p2p_set_country(struct p2p_data *p2p, const char *country)
3175 {
3176 os_memcpy(p2p->cfg->country, country, 3);
3177 return 0;
3178 }
3179
3180
p2p_pre_find_operation(struct p2p_data * p2p,struct p2p_device * dev)3181 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
3182 {
3183 int res;
3184
3185 if (dev->sd_pending_bcast_queries == 0) {
3186 /* Initialize with total number of registered broadcast
3187 * SD queries. */
3188 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
3189 }
3190
3191 res = p2p_start_sd(p2p, dev);
3192 if (res == -2)
3193 return -2;
3194 if (res == 0)
3195 return 1;
3196
3197 if (dev->req_config_methods &&
3198 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
3199 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3200 MACSTR " (config methods 0x%x)",
3201 MAC2STR(dev->info.p2p_device_addr),
3202 dev->req_config_methods);
3203 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
3204 return 1;
3205 }
3206
3207 return 0;
3208 }
3209
3210
p2p_continue_find(struct p2p_data * p2p)3211 void p2p_continue_find(struct p2p_data *p2p)
3212 {
3213 struct p2p_device *dev;
3214 int found, res;
3215
3216 p2p_set_state(p2p, P2P_SEARCH);
3217
3218 /* Continue from the device following the last iteration */
3219 found = 0;
3220 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3221 if (dev == p2p->last_p2p_find_oper) {
3222 found = 1;
3223 continue;
3224 }
3225 if (!found)
3226 continue;
3227 res = p2p_pre_find_operation(p2p, dev);
3228 if (res > 0) {
3229 p2p->last_p2p_find_oper = dev;
3230 return;
3231 }
3232 if (res == -2)
3233 goto skip_sd;
3234 }
3235
3236 /*
3237 * Wrap around to the beginning of the list and continue until the last
3238 * iteration device.
3239 */
3240 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3241 res = p2p_pre_find_operation(p2p, dev);
3242 if (res > 0) {
3243 p2p->last_p2p_find_oper = dev;
3244 return;
3245 }
3246 if (res == -2)
3247 goto skip_sd;
3248 if (dev == p2p->last_p2p_find_oper)
3249 break;
3250 }
3251
3252 skip_sd:
3253 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN);
3254 p2p_listen_in_find(p2p, 1);
3255 }
3256
3257
p2p_sd_cb(struct p2p_data * p2p,int success)3258 static void p2p_sd_cb(struct p2p_data *p2p, int success)
3259 {
3260 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
3261 success);
3262 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3263
3264 if (!success) {
3265 if (p2p->sd_peer) {
3266 if (is_zero_ether_addr(p2p->sd_query_no_ack)) {
3267 os_memcpy(p2p->sd_query_no_ack,
3268 p2p->sd_peer->info.p2p_device_addr,
3269 ETH_ALEN);
3270 p2p_dbg(p2p,
3271 "First SD Query no-ACK in this search iteration: "
3272 MACSTR, MAC2STR(p2p->sd_query_no_ack));
3273 }
3274 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3275 }
3276 p2p->sd_peer = NULL;
3277 if (p2p->state != P2P_IDLE)
3278 p2p_continue_find(p2p);
3279 return;
3280 }
3281
3282 if (p2p->sd_peer == NULL) {
3283 p2p_dbg(p2p, "No SD peer entry known");
3284 if (p2p->state != P2P_IDLE)
3285 p2p_continue_find(p2p);
3286 return;
3287 }
3288
3289 if (p2p->sd_query && p2p->sd_query->for_all_peers) {
3290 /* Update the pending broadcast SD query count for this device
3291 */
3292 p2p->sd_peer->sd_pending_bcast_queries--;
3293
3294 /*
3295 * If there are no pending broadcast queries for this device,
3296 * mark it as done (-1).
3297 */
3298 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
3299 p2p->sd_peer->sd_pending_bcast_queries = -1;
3300 }
3301
3302 /* Wait for response from the peer */
3303 p2p_set_state(p2p, P2P_SD_DURING_FIND);
3304 p2p_set_timeout(p2p, 0, 200000);
3305 }
3306
3307
3308 /**
3309 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
3310 * @p2p: P2P module context from p2p_init()
3311 */
p2p_retry_pd(struct p2p_data * p2p)3312 static void p2p_retry_pd(struct p2p_data *p2p)
3313 {
3314 struct p2p_device *dev;
3315
3316 /*
3317 * Retry the prov disc req attempt only for the peer that the user had
3318 * requested.
3319 */
3320
3321 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3322 if (os_memcmp(p2p->pending_pd_devaddr,
3323 dev->info.p2p_device_addr, ETH_ALEN) != 0)
3324 continue;
3325 if (!dev->req_config_methods)
3326 continue;
3327
3328 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3329 MACSTR " (config methods 0x%x)",
3330 MAC2STR(dev->info.p2p_device_addr),
3331 dev->req_config_methods);
3332 p2p_send_prov_disc_req(p2p, dev,
3333 dev->flags & P2P_DEV_PD_FOR_JOIN,
3334 p2p->pd_force_freq);
3335 return;
3336 }
3337 }
3338
3339
p2p_prov_disc_cb(struct p2p_data * p2p,int success)3340 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
3341 {
3342 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
3343 success);
3344
3345 /*
3346 * Postpone resetting the pending action state till after we actually
3347 * time out. This allows us to take some action like notifying any
3348 * interested parties about no response to the request.
3349 *
3350 * When the timer (below) goes off we check in IDLE, SEARCH, or
3351 * LISTEN_ONLY state, which are the only allowed states to issue a PD
3352 * requests in, if this was still pending and then raise notification.
3353 */
3354
3355 if (!success) {
3356 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3357
3358 if (p2p->user_initiated_pd &&
3359 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
3360 {
3361 /* Retry request from timeout to avoid busy loops */
3362 p2p->pending_action_state = P2P_PENDING_PD;
3363 p2p_set_timeout(p2p, 0, 50000);
3364 } else if (p2p->state != P2P_IDLE)
3365 p2p_continue_find(p2p);
3366 else if (p2p->user_initiated_pd) {
3367 p2p->pending_action_state = P2P_PENDING_PD;
3368 p2p_set_timeout(p2p, 0, 300000);
3369 }
3370 return;
3371 }
3372
3373 /*
3374 * If after PD Request the peer doesn't expect to receive PD Response
3375 * the PD Request ACK indicates a completion of the current PD. This
3376 * happens only on the advertiser side sending the follow-on PD Request
3377 * with the status different than 12 (Success: accepted by user).
3378 */
3379 if (p2p->p2ps_prov && !p2p->p2ps_prov->pd_seeker &&
3380 p2p->p2ps_prov->status != P2P_SC_SUCCESS_DEFERRED) {
3381 p2p_dbg(p2p, "P2PS PD completion on Follow-on PD Request ACK");
3382
3383 if (p2p->send_action_in_progress) {
3384 p2p->send_action_in_progress = 0;
3385 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3386 }
3387
3388 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3389
3390 if (p2p->cfg->p2ps_prov_complete) {
3391 p2p->cfg->p2ps_prov_complete(
3392 p2p->cfg->cb_ctx,
3393 p2p->p2ps_prov->status,
3394 p2p->p2ps_prov->adv_mac,
3395 p2p->p2ps_prov->adv_mac,
3396 p2p->p2ps_prov->session_mac,
3397 NULL, p2p->p2ps_prov->adv_id,
3398 p2p->p2ps_prov->session_id,
3399 0, 0, NULL, 0, 0, 0,
3400 NULL, NULL, 0, 0, NULL, 0);
3401 }
3402
3403 if (p2p->user_initiated_pd)
3404 p2p_reset_pending_pd(p2p);
3405
3406 p2ps_prov_free(p2p);
3407 return;
3408 }
3409
3410 /*
3411 * This postponing, of resetting pending_action_state, needs to be
3412 * done only for user initiated PD requests and not internal ones.
3413 */
3414 if (p2p->user_initiated_pd)
3415 p2p->pending_action_state = P2P_PENDING_PD;
3416 else
3417 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3418
3419 /* Wait for response from the peer */
3420 if (p2p->state == P2P_SEARCH)
3421 p2p_set_state(p2p, P2P_PD_DURING_FIND);
3422 p2p_set_timeout(p2p, 0, 200000);
3423 }
3424
3425
p2p_check_after_scan_tx_continuation(struct p2p_data * p2p)3426 static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p)
3427 {
3428 if (p2p->after_scan_tx_in_progress) {
3429 p2p->after_scan_tx_in_progress = 0;
3430 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3431 p2p_run_after_scan(p2p))
3432 return 1;
3433 if (p2p->state == P2P_SEARCH) {
3434 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3435 p2p_continue_find(p2p);
3436 }
3437 }
3438
3439 return 0;
3440 }
3441
3442
p2p_prov_disc_resp_cb(struct p2p_data * p2p,int success)3443 static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success)
3444 {
3445 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d",
3446 success);
3447
3448 if (p2p->send_action_in_progress) {
3449 p2p->send_action_in_progress = 0;
3450 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3451 }
3452
3453 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3454
3455 if (!success)
3456 goto continue_search;
3457
3458 if (!p2p->cfg->prov_disc_resp_cb ||
3459 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1)
3460 goto continue_search;
3461
3462 p2p_dbg(p2p,
3463 "Post-Provision Discovery operations started - do not try to continue other P2P operations");
3464 return;
3465
3466 continue_search:
3467 p2p_check_after_scan_tx_continuation(p2p);
3468 }
3469
3470
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)3471 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
3472 struct os_reltime *rx_time, int level, const u8 *ies,
3473 size_t ies_len)
3474 {
3475 if (os_reltime_before(rx_time, &p2p->find_start)) {
3476 /*
3477 * The driver may have cached (e.g., in cfg80211 BSS table) the
3478 * scan results for relatively long time. To avoid reporting
3479 * stale information, update P2P peers only based on results
3480 * that have based on frames received after the last p2p_find
3481 * operation was started.
3482 */
3483 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
3484 " (rx_time=%u.%06u find_start=%u.%06u)",
3485 MAC2STR(bssid), (unsigned int) rx_time->sec,
3486 (unsigned int) rx_time->usec,
3487 (unsigned int) p2p->find_start.sec,
3488 (unsigned int) p2p->find_start.usec);
3489 return 0;
3490 }
3491
3492 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
3493
3494 return 0;
3495 }
3496
3497
p2p_scan_res_handled(struct p2p_data * p2p)3498 void p2p_scan_res_handled(struct p2p_data *p2p)
3499 {
3500 if (!p2p->p2p_scan_running) {
3501 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
3502 }
3503 p2p->p2p_scan_running = 0;
3504 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3505
3506 if (p2p_run_after_scan(p2p))
3507 return;
3508 if (p2p->state == P2P_SEARCH)
3509 p2p_continue_find(p2p);
3510 }
3511
3512
p2p_scan_ie(struct p2p_data * p2p,struct wpabuf * ies,const u8 * dev_id,unsigned int bands)3513 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id,
3514 unsigned int bands)
3515 {
3516 u8 dev_capab;
3517 u8 *len;
3518
3519 #ifdef CONFIG_WIFI_DISPLAY
3520 if (p2p->wfd_ie_probe_req)
3521 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3522 #endif /* CONFIG_WIFI_DISPLAY */
3523
3524 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3525 wpabuf_put_buf(ies,
3526 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3527
3528 len = p2p_buf_add_ie_hdr(ies);
3529
3530 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3531
3532 /* P2PS requires Probe Request frames to include SD bit */
3533 if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3534 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
3535
3536 p2p_buf_add_capability(ies, dev_capab, 0);
3537
3538 if (dev_id)
3539 p2p_buf_add_device_id(ies, dev_id);
3540 if (p2p->cfg->reg_class && p2p->cfg->channel)
3541 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3542 p2p->cfg->reg_class,
3543 p2p->cfg->channel);
3544 if (p2p->ext_listen_interval)
3545 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3546 p2p->ext_listen_interval);
3547
3548 if (bands & BAND_60_GHZ)
3549 p2p_buf_add_device_info(ies, p2p, NULL);
3550
3551 if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3552 p2p_buf_add_service_hash(ies, p2p);
3553
3554 /* TODO: p2p_buf_add_operating_channel() if GO */
3555 p2p_buf_update_ie_hdr(ies, len);
3556 }
3557
3558
p2p_scan_ie_buf_len(struct p2p_data * p2p)3559 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3560 {
3561 size_t len = 100;
3562
3563 #ifdef CONFIG_WIFI_DISPLAY
3564 if (p2p && p2p->wfd_ie_probe_req)
3565 len += wpabuf_len(p2p->wfd_ie_probe_req);
3566 #endif /* CONFIG_WIFI_DISPLAY */
3567
3568 if (p2p && p2p->vendor_elem &&
3569 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3570 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3571
3572 return len;
3573 }
3574
3575
p2p_ie_text(struct wpabuf * p2p_ie,char * buf,char * end)3576 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3577 {
3578 return p2p_attr_text(p2p_ie, buf, end);
3579 }
3580
3581
p2p_go_neg_req_cb(struct p2p_data * p2p,int success)3582 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3583 {
3584 struct p2p_device *dev = p2p->go_neg_peer;
3585 int timeout;
3586
3587 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3588
3589 if (dev == NULL) {
3590 p2p_dbg(p2p, "No pending GO Negotiation");
3591 return;
3592 }
3593
3594 if (success) {
3595 if (dev->flags & P2P_DEV_USER_REJECTED) {
3596 p2p_set_state(p2p, P2P_IDLE);
3597 return;
3598 }
3599 } else if (dev->go_neg_req_sent) {
3600 /* Cancel the increment from p2p_connect_send() on failure */
3601 dev->go_neg_req_sent--;
3602 }
3603
3604 if (!success &&
3605 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3606 !is_zero_ether_addr(dev->member_in_go_dev)) {
3607 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3608 MAC2STR(dev->info.p2p_device_addr));
3609 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3610 p2p_send_dev_disc_req(p2p, dev);
3611 return;
3612 }
3613
3614 /*
3615 * Use P2P find, if needed, to find the other device from its listen
3616 * channel.
3617 */
3618 p2p_set_state(p2p, P2P_CONNECT);
3619 timeout = success ? 500000 : 100000;
3620 if (!success && p2p->go_neg_peer &&
3621 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3622 unsigned int r;
3623 /*
3624 * Peer is expected to wait our response and we will skip the
3625 * listen phase. Add some randomness to the wait time here to
3626 * make it less likely to hit cases where we could end up in
3627 * sync with peer not listening.
3628 */
3629 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3630 r = 0;
3631 timeout += r % 100000;
3632 }
3633 p2p_set_timeout(p2p, 0, timeout);
3634 }
3635
3636
p2p_go_neg_resp_cb(struct p2p_data * p2p,int success)3637 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3638 {
3639 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3640 success);
3641 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3642 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3643 return;
3644 }
3645 p2p_set_state(p2p, P2P_CONNECT);
3646 p2p_set_timeout(p2p, 0, 500000);
3647 }
3648
3649
p2p_go_neg_resp_failure_cb(struct p2p_data * p2p,int success,const u8 * addr)3650 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3651 const u8 *addr)
3652 {
3653 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3654 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3655 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3656 return;
3657 }
3658
3659 if (success) {
3660 struct p2p_device *dev;
3661 dev = p2p_get_device(p2p, addr);
3662 if (dev &&
3663 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3664 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3665 }
3666
3667 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
3668 p2p_continue_find(p2p);
3669 }
3670
3671
p2p_go_neg_conf_cb(struct p2p_data * p2p,enum p2p_send_action_result result)3672 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3673 enum p2p_send_action_result result)
3674 {
3675 struct p2p_device *dev;
3676
3677 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3678 if (result == P2P_SEND_ACTION_FAILED) {
3679 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3680 p2p_go_neg_failed(p2p, -1);
3681 return;
3682 }
3683
3684 dev = p2p->go_neg_peer;
3685
3686 if (result == P2P_SEND_ACTION_NO_ACK) {
3687 /*
3688 * Retry GO Negotiation Confirmation
3689 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3690 * ACK for confirmation.
3691 */
3692 if (dev && dev->go_neg_conf &&
3693 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3694 p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3695 dev->go_neg_conf_sent);
3696 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3697 if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3698 dev->info.p2p_device_addr,
3699 p2p->cfg->dev_addr,
3700 dev->info.p2p_device_addr,
3701 wpabuf_head(dev->go_neg_conf),
3702 wpabuf_len(dev->go_neg_conf), 0) >=
3703 0) {
3704 dev->go_neg_conf_sent++;
3705 return;
3706 }
3707 p2p_dbg(p2p, "Failed to re-send Action frame");
3708
3709 /*
3710 * Continue with the assumption that the first attempt
3711 * went through and just the ACK frame was lost.
3712 */
3713 }
3714
3715 /*
3716 * It looks like the TX status for GO Negotiation Confirm is
3717 * often showing failure even when the peer has actually
3718 * received the frame. Since the peer may change channels
3719 * immediately after having received the frame, we may not see
3720 * an Ack for retries, so just dropping a single frame may
3721 * trigger this. To allow the group formation to succeed if the
3722 * peer did indeed receive the frame, continue regardless of
3723 * the TX status.
3724 */
3725 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3726 }
3727
3728 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3729
3730 if (dev == NULL)
3731 return;
3732
3733 p2p_go_complete(p2p, dev);
3734 }
3735
3736
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)3737 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3738 const u8 *src, const u8 *bssid,
3739 enum p2p_send_action_result result)
3740 {
3741 enum p2p_pending_action_state state;
3742 int success;
3743
3744 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3745 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
3746 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3747 MAC2STR(bssid), result, p2p_state_txt(p2p->state));
3748 success = result == P2P_SEND_ACTION_SUCCESS;
3749 state = p2p->pending_action_state;
3750 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3751 switch (state) {
3752 case P2P_NO_PENDING_ACTION:
3753 if (p2p->send_action_in_progress) {
3754 p2p->send_action_in_progress = 0;
3755 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3756 }
3757 p2p_check_after_scan_tx_continuation(p2p);
3758 break;
3759 case P2P_PENDING_GO_NEG_REQUEST:
3760 p2p_go_neg_req_cb(p2p, success);
3761 break;
3762 case P2P_PENDING_GO_NEG_RESPONSE:
3763 p2p_go_neg_resp_cb(p2p, success);
3764 break;
3765 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3766 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3767 break;
3768 case P2P_PENDING_GO_NEG_CONFIRM:
3769 p2p_go_neg_conf_cb(p2p, result);
3770 break;
3771 case P2P_PENDING_SD:
3772 p2p_sd_cb(p2p, success);
3773 break;
3774 case P2P_PENDING_PD:
3775 p2p_prov_disc_cb(p2p, success);
3776 break;
3777 case P2P_PENDING_PD_RESPONSE:
3778 p2p_prov_disc_resp_cb(p2p, success);
3779 break;
3780 case P2P_PENDING_INVITATION_REQUEST:
3781 p2p_invitation_req_cb(p2p, success);
3782 break;
3783 case P2P_PENDING_INVITATION_RESPONSE:
3784 p2p_invitation_resp_cb(p2p, success);
3785 break;
3786 case P2P_PENDING_DEV_DISC_REQUEST:
3787 p2p_dev_disc_req_cb(p2p, success);
3788 break;
3789 case P2P_PENDING_DEV_DISC_RESPONSE:
3790 p2p_dev_disc_resp_cb(p2p, success);
3791 break;
3792 case P2P_PENDING_GO_DISC_REQ:
3793 p2p_go_disc_req_cb(p2p, success);
3794 break;
3795 }
3796
3797 p2p->after_scan_tx_in_progress = 0;
3798 }
3799
3800
p2p_listen_cb(struct p2p_data * p2p,unsigned int freq,unsigned int duration)3801 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3802 unsigned int duration)
3803 {
3804 if (freq == p2p->pending_client_disc_freq) {
3805 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3806 p2p->pending_client_disc_freq = 0;
3807 return;
3808 }
3809
3810 if (freq != p2p->pending_listen_freq) {
3811 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3812 freq, duration, p2p->pending_listen_freq);
3813 return;
3814 }
3815
3816 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3817 p2p->pending_listen_sec, p2p->pending_listen_usec,
3818 p2p->pending_listen_freq);
3819 p2p->in_listen = 1;
3820 p2p->drv_in_listen = freq;
3821 if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3822 /*
3823 * Add 20 msec extra wait to avoid race condition with driver
3824 * remain-on-channel end event, i.e., give driver more time to
3825 * complete the operation before our timeout expires.
3826 */
3827 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3828 p2p->pending_listen_usec + 20000);
3829 }
3830
3831 p2p->pending_listen_freq = 0;
3832 }
3833
3834
p2p_listen_end(struct p2p_data * p2p,unsigned int freq)3835 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3836 {
3837 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3838 p2p->drv_in_listen = 0;
3839 if (p2p->in_listen)
3840 return 0; /* Internal timeout will trigger the next step */
3841
3842 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3843 if (p2p->go_neg_peer->connect_reqs >= 120) {
3844 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3845 p2p_go_neg_failed(p2p, -1);
3846 return 0;
3847 }
3848
3849 p2p_set_state(p2p, P2P_CONNECT);
3850 p2p_connect_send(p2p, p2p->go_neg_peer);
3851 return 1;
3852 } else if (p2p->state == P2P_SEARCH) {
3853 if (p2p->p2p_scan_running) {
3854 /*
3855 * Search is already in progress. This can happen if
3856 * an Action frame RX is reported immediately after
3857 * the end of a remain-on-channel operation and the
3858 * response frame to that is sent using an offchannel
3859 * operation while in p2p_find. Avoid an attempt to
3860 * restart a scan here.
3861 */
3862 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3863 return 1;
3864 }
3865 if (p2p->pending_listen_freq) {
3866 /*
3867 * Better wait a bit if the driver is unable to start
3868 * offchannel operation for some reason. p2p_search()
3869 * will be started from internal timeout.
3870 */
3871 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3872 p2p_set_timeout(p2p, 0, 100000);
3873 return 1;
3874 }
3875 if (p2p->search_delay) {
3876 p2p_dbg(p2p, "Delay search operation by %u ms",
3877 p2p->search_delay);
3878 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3879 (p2p->search_delay % 1000) * 1000);
3880 return 1;
3881 }
3882 p2p_search(p2p);
3883 return 1;
3884 }
3885
3886 return 0;
3887 }
3888
3889
p2p_timeout_connect(struct p2p_data * p2p)3890 static void p2p_timeout_connect(struct p2p_data *p2p)
3891 {
3892 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3893 if (p2p->go_neg_peer &&
3894 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3895 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3896 p2p_go_neg_failed(p2p, -1);
3897 return;
3898 }
3899 if (p2p->go_neg_peer &&
3900 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3901 p2p->go_neg_peer->connect_reqs < 120) {
3902 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3903 p2p_connect_send(p2p, p2p->go_neg_peer);
3904 return;
3905 }
3906 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3907 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3908 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3909 p2p_set_timeout(p2p, 0, 30000);
3910 return;
3911 }
3912 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3913 p2p_listen_in_find(p2p, 0);
3914 }
3915
3916
p2p_timeout_connect_listen(struct p2p_data * p2p)3917 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3918 {
3919 if (p2p->go_neg_peer) {
3920 if (p2p->drv_in_listen) {
3921 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3922 return;
3923 }
3924
3925 if (p2p->go_neg_peer->connect_reqs >= 120) {
3926 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3927 p2p_go_neg_failed(p2p, -1);
3928 return;
3929 }
3930
3931 p2p_set_state(p2p, P2P_CONNECT);
3932 p2p_connect_send(p2p, p2p->go_neg_peer);
3933 } else
3934 p2p_set_state(p2p, P2P_IDLE);
3935 }
3936
3937
p2p_timeout_wait_peer_connect(struct p2p_data * p2p)3938 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3939 {
3940 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3941
3942 if (p2p->cfg->is_concurrent_session_active &&
3943 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3944 p2p_set_timeout(p2p, 0, 500000);
3945 else
3946 p2p_set_timeout(p2p, 0, 200000);
3947 }
3948
3949
p2p_timeout_wait_peer_idle(struct p2p_data * p2p)3950 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3951 {
3952 struct p2p_device *dev = p2p->go_neg_peer;
3953
3954 if (dev == NULL) {
3955 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3956 return;
3957 }
3958
3959 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3960 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3961 p2p_listen_in_find(p2p, 0);
3962 }
3963
3964
p2p_timeout_sd_during_find(struct p2p_data * p2p)3965 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3966 {
3967 p2p_dbg(p2p, "Service Discovery Query timeout");
3968 if (p2p->sd_peer) {
3969 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3970 p2p->sd_peer = NULL;
3971 }
3972 p2p_continue_find(p2p);
3973 }
3974
3975
p2p_timeout_prov_disc_during_find(struct p2p_data * p2p)3976 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3977 {
3978 p2p_dbg(p2p, "Provision Discovery Request timeout");
3979 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3980 p2p_continue_find(p2p);
3981 }
3982
3983
p2p_timeout_prov_disc_req(struct p2p_data * p2p)3984 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3985 {
3986 u32 adv_id = 0;
3987 u8 *adv_mac = NULL;
3988
3989 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3990
3991 /*
3992 * For user initiated PD requests that we have not gotten any responses
3993 * for while in IDLE state, we retry them a couple of times before
3994 * giving up.
3995 */
3996 if (!p2p->user_initiated_pd)
3997 return;
3998
3999 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
4000
4001 if (p2p->pd_retries) {
4002 p2p->pd_retries--;
4003 p2p_retry_pd(p2p);
4004 } else {
4005 struct p2p_device *dev;
4006 int for_join = 0;
4007
4008 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
4009 if (os_memcmp(p2p->pending_pd_devaddr,
4010 dev->info.p2p_device_addr, ETH_ALEN) != 0)
4011 continue;
4012 if (dev->req_config_methods &&
4013 (dev->flags & P2P_DEV_PD_FOR_JOIN))
4014 for_join = 1;
4015 }
4016
4017 if (p2p->p2ps_prov) {
4018 adv_id = p2p->p2ps_prov->adv_id;
4019 adv_mac = p2p->p2ps_prov->adv_mac;
4020 }
4021
4022 if (p2p->cfg->prov_disc_fail)
4023 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
4024 p2p->pending_pd_devaddr,
4025 for_join ?
4026 P2P_PROV_DISC_TIMEOUT_JOIN :
4027 P2P_PROV_DISC_TIMEOUT,
4028 adv_id, adv_mac, NULL);
4029 p2p_reset_pending_pd(p2p);
4030 }
4031 }
4032
4033
p2p_timeout_invite(struct p2p_data * p2p)4034 static void p2p_timeout_invite(struct p2p_data *p2p)
4035 {
4036 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
4037 p2p_set_state(p2p, P2P_INVITE_LISTEN);
4038 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
4039 /*
4040 * Better remain on operating channel instead of listen channel
4041 * when running a group.
4042 */
4043 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
4044 p2p_set_timeout(p2p, 0, 100000);
4045 return;
4046 }
4047 p2p_listen_in_find(p2p, 0);
4048 }
4049
4050
p2p_timeout_invite_listen(struct p2p_data * p2p)4051 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
4052 {
4053 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
4054 p2p_set_state(p2p, P2P_INVITE);
4055 p2p_invite_send(p2p, p2p->invite_peer,
4056 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
4057 } else {
4058 if (p2p->invite_peer) {
4059 p2p_dbg(p2p, "Invitation Request retry limit reached");
4060 if (p2p->cfg->invitation_result)
4061 p2p->cfg->invitation_result(
4062 p2p->cfg->cb_ctx, -1, NULL, NULL,
4063 p2p->invite_peer->info.p2p_device_addr,
4064 0, 0);
4065 }
4066 p2p_set_state(p2p, P2P_IDLE);
4067 }
4068 }
4069
4070
p2p_state_timeout(void * eloop_ctx,void * timeout_ctx)4071 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
4072 {
4073 struct p2p_data *p2p = eloop_ctx;
4074
4075 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
4076
4077 p2p->in_listen = 0;
4078 if (p2p->drv_in_listen) {
4079 p2p_dbg(p2p, "Driver is still in listen state - stop it");
4080 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
4081 }
4082
4083 switch (p2p->state) {
4084 case P2P_IDLE:
4085 /* Check if we timed out waiting for PD req */
4086 if (p2p->pending_action_state == P2P_PENDING_PD)
4087 p2p_timeout_prov_disc_req(p2p);
4088 break;
4089 case P2P_SEARCH:
4090 /* Check if we timed out waiting for PD req */
4091 if (p2p->pending_action_state == P2P_PENDING_PD)
4092 p2p_timeout_prov_disc_req(p2p);
4093 if (p2p->search_delay && !p2p->in_search_delay) {
4094 p2p_dbg(p2p, "Delay search operation by %u ms",
4095 p2p->search_delay);
4096 p2p->in_search_delay = 1;
4097 p2p_set_timeout(p2p, p2p->search_delay / 1000,
4098 (p2p->search_delay % 1000) * 1000);
4099 break;
4100 }
4101 p2p->in_search_delay = 0;
4102 p2p_search(p2p);
4103 break;
4104 case P2P_CONNECT:
4105 p2p_timeout_connect(p2p);
4106 break;
4107 case P2P_CONNECT_LISTEN:
4108 p2p_timeout_connect_listen(p2p);
4109 break;
4110 case P2P_GO_NEG:
4111 break;
4112 case P2P_LISTEN_ONLY:
4113 /* Check if we timed out waiting for PD req */
4114 if (p2p->pending_action_state == P2P_PENDING_PD)
4115 p2p_timeout_prov_disc_req(p2p);
4116
4117 if (p2p->ext_listen_only) {
4118 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
4119 p2p->ext_listen_only = 0;
4120 p2p_set_state(p2p, P2P_IDLE);
4121 }
4122 break;
4123 case P2P_WAIT_PEER_CONNECT:
4124 p2p_timeout_wait_peer_connect(p2p);
4125 break;
4126 case P2P_WAIT_PEER_IDLE:
4127 p2p_timeout_wait_peer_idle(p2p);
4128 break;
4129 case P2P_SD_DURING_FIND:
4130 p2p_timeout_sd_during_find(p2p);
4131 break;
4132 case P2P_PROVISIONING:
4133 break;
4134 case P2P_PD_DURING_FIND:
4135 p2p_timeout_prov_disc_during_find(p2p);
4136 break;
4137 case P2P_INVITE:
4138 p2p_timeout_invite(p2p);
4139 break;
4140 case P2P_INVITE_LISTEN:
4141 p2p_timeout_invite_listen(p2p);
4142 break;
4143 }
4144 }
4145
4146
p2p_reject(struct p2p_data * p2p,const u8 * peer_addr)4147 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
4148 {
4149 struct p2p_device *dev;
4150
4151 dev = p2p_get_device(p2p, peer_addr);
4152 p2p_dbg(p2p, "Local request to reject connection attempts by peer "
4153 MACSTR, MAC2STR(peer_addr));
4154 if (dev == NULL) {
4155 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
4156 return -1;
4157 }
4158 dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
4159 dev->flags |= P2P_DEV_USER_REJECTED;
4160 return 0;
4161 }
4162
4163
p2p_wps_method_text(enum p2p_wps_method method)4164 const char * p2p_wps_method_text(enum p2p_wps_method method)
4165 {
4166 switch (method) {
4167 case WPS_NOT_READY:
4168 return "not-ready";
4169 case WPS_PIN_DISPLAY:
4170 return "Display";
4171 case WPS_PIN_KEYPAD:
4172 return "Keypad";
4173 case WPS_PBC:
4174 return "PBC";
4175 case WPS_NFC:
4176 return "NFC";
4177 case WPS_P2PS:
4178 return "P2PS";
4179 }
4180
4181 return "??";
4182 }
4183
4184
p2p_go_state_text(enum p2p_go_state go_state)4185 static const char * p2p_go_state_text(enum p2p_go_state go_state)
4186 {
4187 switch (go_state) {
4188 case UNKNOWN_GO:
4189 return "unknown";
4190 case LOCAL_GO:
4191 return "local";
4192 case REMOTE_GO:
4193 return "remote";
4194 }
4195
4196 return "??";
4197 }
4198
4199
p2p_get_peer_info(struct p2p_data * p2p,const u8 * addr,int next)4200 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
4201 const u8 *addr, int next)
4202 {
4203 struct p2p_device *dev;
4204
4205 if (addr)
4206 dev = p2p_get_device(p2p, addr);
4207 else
4208 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4209
4210 if (dev && next) {
4211 dev = dl_list_first(&dev->list, struct p2p_device, list);
4212 if (&dev->list == &p2p->devices)
4213 dev = NULL;
4214 }
4215
4216 if (dev == NULL)
4217 return NULL;
4218
4219 return &dev->info;
4220 }
4221
4222
p2p_get_peer_info_txt(const struct p2p_peer_info * info,char * buf,size_t buflen)4223 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
4224 char *buf, size_t buflen)
4225 {
4226 struct p2p_device *dev;
4227 int res;
4228 char *pos, *end;
4229 struct os_reltime now;
4230
4231 if (info == NULL)
4232 return -1;
4233
4234 dev = (struct p2p_device *) (((u8 *) info) -
4235 offsetof(struct p2p_device, info));
4236
4237 pos = buf;
4238 end = buf + buflen;
4239
4240 os_get_reltime(&now);
4241 res = os_snprintf(pos, end - pos,
4242 "age=%d\n"
4243 "listen_freq=%d\n"
4244 "wps_method=%s\n"
4245 "interface_addr=" MACSTR "\n"
4246 "member_in_go_dev=" MACSTR "\n"
4247 "member_in_go_iface=" MACSTR "\n"
4248 "go_neg_req_sent=%d\n"
4249 "go_state=%s\n"
4250 "dialog_token=%u\n"
4251 "intended_addr=" MACSTR "\n"
4252 "country=%c%c\n"
4253 "oper_freq=%d\n"
4254 "req_config_methods=0x%x\n"
4255 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
4256 "status=%d\n"
4257 "invitation_reqs=%u\n",
4258 (int) (now.sec - dev->last_seen.sec),
4259 dev->listen_freq,
4260 p2p_wps_method_text(dev->wps_method),
4261 MAC2STR(dev->interface_addr),
4262 MAC2STR(dev->member_in_go_dev),
4263 MAC2STR(dev->member_in_go_iface),
4264 dev->go_neg_req_sent,
4265 p2p_go_state_text(dev->go_state),
4266 dev->dialog_token,
4267 MAC2STR(dev->intended_addr),
4268 dev->country[0] ? dev->country[0] : '_',
4269 dev->country[1] ? dev->country[1] : '_',
4270 dev->oper_freq,
4271 dev->req_config_methods,
4272 dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
4273 "[PROBE_REQ_ONLY]" : "",
4274 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
4275 dev->flags & P2P_DEV_NOT_YET_READY ?
4276 "[NOT_YET_READY]" : "",
4277 dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
4278 "[PD_PEER_DISPLAY]" : "",
4279 dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
4280 "[PD_PEER_KEYPAD]" : "",
4281 dev->flags & P2P_DEV_PD_PEER_P2PS ?
4282 "[PD_PEER_P2PS]" : "",
4283 dev->flags & P2P_DEV_USER_REJECTED ?
4284 "[USER_REJECTED]" : "",
4285 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
4286 "[PEER_WAITING_RESPONSE]" : "",
4287 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
4288 "[PREFER_PERSISTENT_GROUP]" : "",
4289 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
4290 "[WAIT_GO_NEG_RESPONSE]" : "",
4291 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
4292 "[WAIT_GO_NEG_CONFIRM]" : "",
4293 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
4294 "[GROUP_CLIENT_ONLY]" : "",
4295 dev->flags & P2P_DEV_FORCE_FREQ ?
4296 "[FORCE_FREQ]" : "",
4297 dev->flags & P2P_DEV_PD_FOR_JOIN ?
4298 "[PD_FOR_JOIN]" : "",
4299 dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT ?
4300 "[LAST_SEEN_AS_GROUP_CLIENT]" : "",
4301 dev->status,
4302 dev->invitation_reqs);
4303 if (os_snprintf_error(end - pos, res))
4304 return pos - buf;
4305 pos += res;
4306
4307 if (dev->ext_listen_period) {
4308 res = os_snprintf(pos, end - pos,
4309 "ext_listen_period=%u\n"
4310 "ext_listen_interval=%u\n",
4311 dev->ext_listen_period,
4312 dev->ext_listen_interval);
4313 if (os_snprintf_error(end - pos, res))
4314 return pos - buf;
4315 pos += res;
4316 }
4317
4318 if (dev->oper_ssid_len) {
4319 res = os_snprintf(pos, end - pos,
4320 "oper_ssid=%s\n",
4321 wpa_ssid_txt(dev->oper_ssid,
4322 dev->oper_ssid_len));
4323 if (os_snprintf_error(end - pos, res))
4324 return pos - buf;
4325 pos += res;
4326 }
4327
4328 #ifdef CONFIG_WIFI_DISPLAY
4329 if (dev->info.wfd_subelems) {
4330 res = os_snprintf(pos, end - pos, "wfd_subelems=");
4331 if (os_snprintf_error(end - pos, res))
4332 return pos - buf;
4333 pos += res;
4334
4335 pos += wpa_snprintf_hex(pos, end - pos,
4336 wpabuf_head(dev->info.wfd_subelems),
4337 wpabuf_len(dev->info.wfd_subelems));
4338
4339 res = os_snprintf(pos, end - pos, "\n");
4340 if (os_snprintf_error(end - pos, res))
4341 return pos - buf;
4342 pos += res;
4343 }
4344 #endif /* CONFIG_WIFI_DISPLAY */
4345
4346 return pos - buf;
4347 }
4348
4349
p2p_peer_known(struct p2p_data * p2p,const u8 * addr)4350 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
4351 {
4352 return p2p_get_device(p2p, addr) != NULL;
4353 }
4354
4355
p2p_set_client_discoverability(struct p2p_data * p2p,int enabled)4356 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
4357 {
4358 if (enabled) {
4359 p2p_dbg(p2p, "Client discoverability enabled");
4360 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4361 } else {
4362 p2p_dbg(p2p, "Client discoverability disabled");
4363 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4364 }
4365 }
4366
4367
p2p_build_presence_req(u32 duration1,u32 interval1,u32 duration2,u32 interval2)4368 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
4369 u32 duration2, u32 interval2)
4370 {
4371 struct wpabuf *req;
4372 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
4373 u8 *len;
4374
4375 req = wpabuf_alloc(100);
4376 if (req == NULL)
4377 return NULL;
4378
4379 if (duration1 || interval1) {
4380 os_memset(&desc1, 0, sizeof(desc1));
4381 desc1.count_type = 1;
4382 desc1.duration = duration1;
4383 desc1.interval = interval1;
4384 ptr1 = &desc1;
4385
4386 if (duration2 || interval2) {
4387 os_memset(&desc2, 0, sizeof(desc2));
4388 desc2.count_type = 2;
4389 desc2.duration = duration2;
4390 desc2.interval = interval2;
4391 ptr2 = &desc2;
4392 }
4393 }
4394
4395 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
4396 len = p2p_buf_add_ie_hdr(req);
4397 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
4398 p2p_buf_update_ie_hdr(req, len);
4399
4400 return req;
4401 }
4402
4403
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)4404 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
4405 const u8 *own_interface_addr, unsigned int freq,
4406 u32 duration1, u32 interval1, u32 duration2,
4407 u32 interval2)
4408 {
4409 struct wpabuf *req;
4410
4411 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
4412 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
4413 "dur2=%u int2=%u",
4414 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
4415 freq, duration1, interval1, duration2, interval2);
4416
4417 req = p2p_build_presence_req(duration1, interval1, duration2,
4418 interval2);
4419 if (req == NULL)
4420 return -1;
4421
4422 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4423 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
4424 go_interface_addr,
4425 wpabuf_head(req), wpabuf_len(req), 200) < 0) {
4426 p2p_dbg(p2p, "Failed to send Action frame");
4427 }
4428 wpabuf_free(req);
4429
4430 return 0;
4431 }
4432
4433
p2p_build_presence_resp(u8 status,const u8 * noa,size_t noa_len,u8 dialog_token)4434 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
4435 size_t noa_len, u8 dialog_token)
4436 {
4437 struct wpabuf *resp;
4438 u8 *len;
4439
4440 resp = wpabuf_alloc(100 + noa_len);
4441 if (resp == NULL)
4442 return NULL;
4443
4444 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
4445 len = p2p_buf_add_ie_hdr(resp);
4446 p2p_buf_add_status(resp, status);
4447 if (noa) {
4448 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
4449 wpabuf_put_le16(resp, noa_len);
4450 wpabuf_put_data(resp, noa, noa_len);
4451 } else
4452 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
4453 p2p_buf_update_ie_hdr(resp, len);
4454
4455 return resp;
4456 }
4457
4458
p2p_process_presence_req(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len,int rx_freq)4459 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
4460 const u8 *sa, const u8 *data, size_t len,
4461 int rx_freq)
4462 {
4463 struct p2p_message msg;
4464 u8 status;
4465 struct wpabuf *resp;
4466 size_t g;
4467 struct p2p_group *group = NULL;
4468 int parsed = 0;
4469 u8 noa[50];
4470 int noa_len;
4471
4472 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
4473
4474 for (g = 0; g < p2p->num_groups; g++) {
4475 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
4476 ETH_ALEN) == 0) {
4477 group = p2p->groups[g];
4478 break;
4479 }
4480 }
4481 if (group == NULL) {
4482 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
4483 MACSTR, MAC2STR(da));
4484 return;
4485 }
4486
4487 if (p2p_parse(data, len, &msg) < 0) {
4488 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
4489 status = P2P_SC_FAIL_INVALID_PARAMS;
4490 goto fail;
4491 }
4492 parsed = 1;
4493
4494 if (msg.noa == NULL) {
4495 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
4496 status = P2P_SC_FAIL_INVALID_PARAMS;
4497 goto fail;
4498 }
4499
4500 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
4501
4502 fail:
4503 if (p2p->cfg->get_noa)
4504 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
4505 sizeof(noa));
4506 else
4507 noa_len = -1;
4508 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
4509 noa_len > 0 ? noa_len : 0,
4510 msg.dialog_token);
4511 if (parsed)
4512 p2p_parse_free(&msg);
4513 if (resp == NULL)
4514 return;
4515
4516 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4517 if (p2p_send_action(p2p, rx_freq, sa, da, da,
4518 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
4519 p2p_dbg(p2p, "Failed to send Action frame");
4520 }
4521 wpabuf_free(resp);
4522 }
4523
4524
p2p_process_presence_resp(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len)4525 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
4526 const u8 *sa, const u8 *data, size_t len)
4527 {
4528 struct p2p_message msg;
4529
4530 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
4531
4532 if (p2p_parse(data, len, &msg) < 0) {
4533 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
4534 return;
4535 }
4536
4537 if (msg.status == NULL || msg.noa == NULL) {
4538 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
4539 p2p_parse_free(&msg);
4540 return;
4541 }
4542
4543 if (p2p->cfg->presence_resp) {
4544 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4545 msg.noa, msg.noa_len);
4546 }
4547
4548 if (*msg.status) {
4549 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4550 *msg.status);
4551 p2p_parse_free(&msg);
4552 return;
4553 }
4554
4555 p2p_dbg(p2p, "P2P Presence Request was accepted");
4556 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4557 msg.noa, msg.noa_len);
4558 /* TODO: process NoA */
4559 p2p_parse_free(&msg);
4560 }
4561
4562
p2p_ext_listen_timeout(void * eloop_ctx,void * timeout_ctx)4563 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4564 {
4565 struct p2p_data *p2p = eloop_ctx;
4566
4567 if (p2p->ext_listen_interval) {
4568 /* Schedule next extended listen timeout */
4569 eloop_register_timeout(p2p->ext_listen_interval_sec,
4570 p2p->ext_listen_interval_usec,
4571 p2p_ext_listen_timeout, p2p, NULL);
4572 }
4573
4574 if ((p2p->cfg->is_p2p_in_progress &&
4575 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4576 (p2p->pending_action_state == P2P_PENDING_PD &&
4577 p2p->pd_retries > 0)) {
4578 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4579 p2p_state_txt(p2p->state));
4580 return;
4581 }
4582
4583 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4584 /*
4585 * This should not really happen, but it looks like the Listen
4586 * command may fail is something else (e.g., a scan) was
4587 * running at an inconvenient time. As a workaround, allow new
4588 * Extended Listen operation to be started.
4589 */
4590 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4591 p2p->ext_listen_only = 0;
4592 p2p_set_state(p2p, P2P_IDLE);
4593 }
4594
4595 if (p2p->state != P2P_IDLE) {
4596 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4597 return;
4598 }
4599
4600 p2p_dbg(p2p, "Extended Listen timeout");
4601 p2p->ext_listen_only = 1;
4602 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4603 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4604 p2p->ext_listen_only = 0;
4605 }
4606 }
4607
4608
p2p_ext_listen(struct p2p_data * p2p,unsigned int period,unsigned int interval)4609 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4610 unsigned int interval)
4611 {
4612 if (period > 65535 || interval > 65535 || period > interval ||
4613 (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4614 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4615 period, interval);
4616 return -1;
4617 }
4618
4619 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4620
4621 if (interval == 0) {
4622 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4623 p2p->ext_listen_period = 0;
4624 p2p->ext_listen_interval = 0;
4625 return 0;
4626 }
4627
4628 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4629 period, interval);
4630 p2p->ext_listen_period = period;
4631 p2p->ext_listen_interval = interval;
4632 p2p->ext_listen_interval_sec = interval / 1000;
4633 p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4634
4635 eloop_register_timeout(p2p->ext_listen_interval_sec,
4636 p2p->ext_listen_interval_usec,
4637 p2p_ext_listen_timeout, p2p, NULL);
4638
4639 return 0;
4640 }
4641
4642
p2p_deauth_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)4643 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4644 const u8 *ie, size_t ie_len)
4645 {
4646 struct p2p_message msg;
4647
4648 if (bssid == NULL || ie == NULL)
4649 return;
4650
4651 os_memset(&msg, 0, sizeof(msg));
4652 if (p2p_parse_ies(ie, ie_len, &msg))
4653 return;
4654 if (msg.minor_reason_code == NULL) {
4655 p2p_parse_free(&msg);
4656 return;
4657 }
4658
4659 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4660 " reason_code=%u minor_reason_code=%u",
4661 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4662
4663 p2p_parse_free(&msg);
4664 }
4665
4666
p2p_disassoc_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)4667 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4668 const u8 *ie, size_t ie_len)
4669 {
4670 struct p2p_message msg;
4671
4672 if (bssid == NULL || ie == NULL)
4673 return;
4674
4675 os_memset(&msg, 0, sizeof(msg));
4676 if (p2p_parse_ies(ie, ie_len, &msg))
4677 return;
4678 if (msg.minor_reason_code == NULL) {
4679 p2p_parse_free(&msg);
4680 return;
4681 }
4682
4683 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4684 " reason_code=%u minor_reason_code=%u",
4685 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4686
4687 p2p_parse_free(&msg);
4688 }
4689
4690
p2p_set_managed_oper(struct p2p_data * p2p,int enabled)4691 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4692 {
4693 if (enabled) {
4694 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4695 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4696 } else {
4697 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4698 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4699 }
4700 }
4701
4702
p2p_config_get_random_social(struct p2p_config * p2p,u8 * op_class,u8 * op_channel)4703 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4704 u8 *op_channel)
4705 {
4706 return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4707 }
4708
4709
p2p_set_listen_channel(struct p2p_data * p2p,u8 reg_class,u8 channel,u8 forced)4710 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4711 u8 forced)
4712 {
4713 if (p2p_channel_to_freq(reg_class, channel) < 0)
4714 return -1;
4715
4716 /*
4717 * Listen channel was set in configuration or set by control interface;
4718 * cannot override it.
4719 */
4720 if (p2p->cfg->channel_forced && forced == 0) {
4721 p2p_dbg(p2p,
4722 "Listen channel was previously configured - do not override based on optimization");
4723 return -1;
4724 }
4725
4726 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4727 reg_class, channel);
4728
4729 if (p2p->state == P2P_IDLE) {
4730 p2p->cfg->reg_class = reg_class;
4731 p2p->cfg->channel = channel;
4732 p2p->cfg->channel_forced = forced;
4733 } else {
4734 p2p_dbg(p2p, "Defer setting listen channel");
4735 p2p->pending_reg_class = reg_class;
4736 p2p->pending_channel = channel;
4737 p2p->pending_channel_forced = forced;
4738 }
4739
4740 return 0;
4741 }
4742
4743
p2p_get_listen_channel(struct p2p_data * p2p)4744 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4745 {
4746 return p2p->cfg->channel;
4747 }
4748
4749
p2p_set_ssid_postfix(struct p2p_data * p2p,const u8 * postfix,size_t len)4750 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4751 {
4752 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4753 if (postfix == NULL) {
4754 p2p->cfg->ssid_postfix_len = 0;
4755 return 0;
4756 }
4757 if (len > sizeof(p2p->cfg->ssid_postfix))
4758 return -1;
4759 os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4760 p2p->cfg->ssid_postfix_len = len;
4761 return 0;
4762 }
4763
4764
p2p_set_oper_channel(struct p2p_data * p2p,u8 op_reg_class,u8 op_channel,int cfg_op_channel)4765 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4766 int cfg_op_channel)
4767 {
4768 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4769 return -1;
4770
4771 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4772 op_reg_class, op_channel);
4773 p2p->cfg->op_reg_class = op_reg_class;
4774 p2p->cfg->op_channel = op_channel;
4775 p2p->cfg->cfg_op_channel = cfg_op_channel;
4776 return 0;
4777 }
4778
4779
p2p_set_pref_chan(struct p2p_data * p2p,unsigned int num_pref_chan,const struct p2p_channel * pref_chan)4780 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4781 const struct p2p_channel *pref_chan)
4782 {
4783 struct p2p_channel *n;
4784
4785 if (pref_chan) {
4786 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4787 if (n == NULL)
4788 return -1;
4789 os_memcpy(n, pref_chan,
4790 num_pref_chan * sizeof(struct p2p_channel));
4791 } else
4792 n = NULL;
4793
4794 os_free(p2p->cfg->pref_chan);
4795 p2p->cfg->pref_chan = n;
4796 p2p->cfg->num_pref_chan = num_pref_chan;
4797
4798 return 0;
4799 }
4800
4801
p2p_set_no_go_freq(struct p2p_data * p2p,const struct wpa_freq_range_list * list)4802 int p2p_set_no_go_freq(struct p2p_data *p2p,
4803 const struct wpa_freq_range_list *list)
4804 {
4805 struct wpa_freq_range *tmp;
4806
4807 if (list == NULL || list->num == 0) {
4808 os_free(p2p->no_go_freq.range);
4809 p2p->no_go_freq.range = NULL;
4810 p2p->no_go_freq.num = 0;
4811 return 0;
4812 }
4813
4814 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4815 if (tmp == NULL)
4816 return -1;
4817 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4818 os_free(p2p->no_go_freq.range);
4819 p2p->no_go_freq.range = tmp;
4820 p2p->no_go_freq.num = list->num;
4821 p2p_dbg(p2p, "Updated no GO chan list");
4822
4823 return 0;
4824 }
4825
4826
p2p_get_interface_addr(struct p2p_data * p2p,const u8 * dev_addr,u8 * iface_addr)4827 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4828 u8 *iface_addr)
4829 {
4830 struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4831 if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4832 return -1;
4833 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4834 return 0;
4835 }
4836
4837
p2p_get_dev_addr(struct p2p_data * p2p,const u8 * iface_addr,u8 * dev_addr)4838 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4839 u8 *dev_addr)
4840 {
4841 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4842 if (dev == NULL)
4843 return -1;
4844 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4845 return 0;
4846 }
4847
4848
p2p_set_peer_filter(struct p2p_data * p2p,const u8 * addr)4849 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4850 {
4851 os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4852 if (is_zero_ether_addr(p2p->peer_filter))
4853 p2p_dbg(p2p, "Disable peer filter");
4854 else
4855 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4856 MAC2STR(p2p->peer_filter));
4857 }
4858
4859
p2p_set_cross_connect(struct p2p_data * p2p,int enabled)4860 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4861 {
4862 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4863 if (p2p->cross_connect == enabled)
4864 return;
4865 p2p->cross_connect = enabled;
4866 /* TODO: may need to tear down any action group where we are GO(?) */
4867 }
4868
4869
p2p_get_oper_freq(struct p2p_data * p2p,const u8 * iface_addr)4870 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4871 {
4872 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4873 if (dev == NULL)
4874 return -1;
4875 if (dev->oper_freq <= 0)
4876 return -1;
4877 return dev->oper_freq;
4878 }
4879
4880
p2p_set_intra_bss_dist(struct p2p_data * p2p,int enabled)4881 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4882 {
4883 p2p_dbg(p2p, "Intra BSS distribution %s",
4884 enabled ? "enabled" : "disabled");
4885 p2p->cfg->p2p_intra_bss = enabled;
4886 }
4887
4888
p2p_update_channel_list(struct p2p_data * p2p,const struct p2p_channels * chan,const struct p2p_channels * cli_chan)4889 void p2p_update_channel_list(struct p2p_data *p2p,
4890 const struct p2p_channels *chan,
4891 const struct p2p_channels *cli_chan)
4892 {
4893 p2p_dbg(p2p, "Update channel list");
4894 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4895 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4896 os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4897 sizeof(struct p2p_channels));
4898 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4899 }
4900
4901
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)4902 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4903 const u8 *src, const u8 *bssid, const u8 *buf,
4904 size_t len, unsigned int wait_time)
4905 {
4906 if (p2p->p2p_scan_running) {
4907 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4908 if (p2p->after_scan_tx) {
4909 p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4910 os_free(p2p->after_scan_tx);
4911 }
4912 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4913 len);
4914 if (p2p->after_scan_tx == NULL)
4915 return -1;
4916 p2p->after_scan_tx->freq = freq;
4917 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4918 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4919 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4920 p2p->after_scan_tx->len = len;
4921 p2p->after_scan_tx->wait_time = wait_time;
4922 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4923 return 0;
4924 }
4925
4926 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4927 buf, len, wait_time);
4928 }
4929
4930
p2p_set_best_channels(struct p2p_data * p2p,int freq_24,int freq_5,int freq_overall)4931 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4932 int freq_overall)
4933 {
4934 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d",
4935 freq_24, freq_5, freq_overall);
4936 p2p->best_freq_24 = freq_24;
4937 p2p->best_freq_5 = freq_5;
4938 p2p->best_freq_overall = freq_overall;
4939 }
4940
4941
p2p_set_own_freq_preference(struct p2p_data * p2p,int freq)4942 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4943 {
4944 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4945 p2p->own_freq_preference = freq;
4946 }
4947
4948
p2p_get_go_neg_peer(struct p2p_data * p2p)4949 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4950 {
4951 if (p2p == NULL || p2p->go_neg_peer == NULL)
4952 return NULL;
4953 return p2p->go_neg_peer->info.p2p_device_addr;
4954 }
4955
4956
4957 const struct p2p_peer_info *
p2p_get_peer_found(struct p2p_data * p2p,const u8 * addr,int next)4958 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4959 {
4960 struct p2p_device *dev;
4961
4962 if (addr) {
4963 dev = p2p_get_device(p2p, addr);
4964 if (!dev)
4965 return NULL;
4966
4967 if (!next) {
4968 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4969 return NULL;
4970
4971 return &dev->info;
4972 } else {
4973 do {
4974 dev = dl_list_first(&dev->list,
4975 struct p2p_device,
4976 list);
4977 if (!dev || &dev->list == &p2p->devices)
4978 return NULL;
4979 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4980 }
4981 } else {
4982 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4983 if (!dev)
4984 return NULL;
4985 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4986 dev = dl_list_first(&dev->list,
4987 struct p2p_device,
4988 list);
4989 if (!dev || &dev->list == &p2p->devices)
4990 return NULL;
4991 }
4992 }
4993
4994 return &dev->info;
4995 }
4996
4997
p2p_in_progress(struct p2p_data * p2p)4998 int p2p_in_progress(struct p2p_data *p2p)
4999 {
5000 if (p2p == NULL)
5001 return 0;
5002 if (p2p->state == P2P_SEARCH)
5003 return 2;
5004 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
5005 }
5006
5007
p2p_set_config_timeout(struct p2p_data * p2p,u8 go_timeout,u8 client_timeout)5008 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
5009 u8 client_timeout)
5010 {
5011 if (p2p) {
5012 p2p->go_timeout = go_timeout;
5013 p2p->client_timeout = client_timeout;
5014 }
5015 }
5016
5017
5018 #ifdef CONFIG_WIFI_DISPLAY
5019
p2p_update_wfd_ie_groups(struct p2p_data * p2p)5020 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
5021 {
5022 size_t g;
5023 struct p2p_group *group;
5024
5025 for (g = 0; g < p2p->num_groups; g++) {
5026 group = p2p->groups[g];
5027 p2p_group_force_beacon_update_ies(group);
5028 }
5029 }
5030
5031
p2p_set_wfd_ie_beacon(struct p2p_data * p2p,struct wpabuf * ie)5032 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
5033 {
5034 wpabuf_free(p2p->wfd_ie_beacon);
5035 p2p->wfd_ie_beacon = ie;
5036 p2p_update_wfd_ie_groups(p2p);
5037 return 0;
5038 }
5039
5040
p2p_set_wfd_ie_probe_req(struct p2p_data * p2p,struct wpabuf * ie)5041 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
5042 {
5043 wpabuf_free(p2p->wfd_ie_probe_req);
5044 p2p->wfd_ie_probe_req = ie;
5045 return 0;
5046 }
5047
5048
p2p_set_wfd_ie_probe_resp(struct p2p_data * p2p,struct wpabuf * ie)5049 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
5050 {
5051 wpabuf_free(p2p->wfd_ie_probe_resp);
5052 p2p->wfd_ie_probe_resp = ie;
5053 p2p_update_wfd_ie_groups(p2p);
5054 return 0;
5055 }
5056
5057
p2p_set_wfd_ie_assoc_req(struct p2p_data * p2p,struct wpabuf * ie)5058 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
5059 {
5060 wpabuf_free(p2p->wfd_ie_assoc_req);
5061 p2p->wfd_ie_assoc_req = ie;
5062 return 0;
5063 }
5064
5065
p2p_set_wfd_ie_invitation(struct p2p_data * p2p,struct wpabuf * ie)5066 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
5067 {
5068 wpabuf_free(p2p->wfd_ie_invitation);
5069 p2p->wfd_ie_invitation = ie;
5070 return 0;
5071 }
5072
5073
p2p_set_wfd_ie_prov_disc_req(struct p2p_data * p2p,struct wpabuf * ie)5074 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
5075 {
5076 wpabuf_free(p2p->wfd_ie_prov_disc_req);
5077 p2p->wfd_ie_prov_disc_req = ie;
5078 return 0;
5079 }
5080
5081
p2p_set_wfd_ie_prov_disc_resp(struct p2p_data * p2p,struct wpabuf * ie)5082 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
5083 {
5084 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
5085 p2p->wfd_ie_prov_disc_resp = ie;
5086 return 0;
5087 }
5088
5089
p2p_set_wfd_ie_go_neg(struct p2p_data * p2p,struct wpabuf * ie)5090 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
5091 {
5092 wpabuf_free(p2p->wfd_ie_go_neg);
5093 p2p->wfd_ie_go_neg = ie;
5094 return 0;
5095 }
5096
5097
p2p_set_wfd_dev_info(struct p2p_data * p2p,const struct wpabuf * elem)5098 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
5099 {
5100 wpabuf_free(p2p->wfd_dev_info);
5101 if (elem) {
5102 p2p->wfd_dev_info = wpabuf_dup(elem);
5103 if (p2p->wfd_dev_info == NULL)
5104 return -1;
5105 } else
5106 p2p->wfd_dev_info = NULL;
5107
5108 return 0;
5109 }
5110
5111
p2p_set_wfd_assoc_bssid(struct p2p_data * p2p,const struct wpabuf * elem)5112 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
5113 {
5114 wpabuf_free(p2p->wfd_assoc_bssid);
5115 if (elem) {
5116 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
5117 if (p2p->wfd_assoc_bssid == NULL)
5118 return -1;
5119 } else
5120 p2p->wfd_assoc_bssid = NULL;
5121
5122 return 0;
5123 }
5124
5125
p2p_set_wfd_coupled_sink_info(struct p2p_data * p2p,const struct wpabuf * elem)5126 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
5127 const struct wpabuf *elem)
5128 {
5129 wpabuf_free(p2p->wfd_coupled_sink_info);
5130 if (elem) {
5131 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
5132 if (p2p->wfd_coupled_sink_info == NULL)
5133 return -1;
5134 } else
5135 p2p->wfd_coupled_sink_info = NULL;
5136
5137 return 0;
5138 }
5139
5140 #endif /* CONFIG_WIFI_DISPLAY */
5141
5142
p2p_set_disc_int(struct p2p_data * p2p,int min_disc_int,int max_disc_int,int max_disc_tu)5143 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
5144 int max_disc_tu)
5145 {
5146 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
5147 return -1;
5148
5149 p2p->min_disc_int = min_disc_int;
5150 p2p->max_disc_int = max_disc_int;
5151 p2p->max_disc_tu = max_disc_tu;
5152 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
5153 min_disc_int, max_disc_int, max_disc_tu);
5154
5155 return 0;
5156 }
5157
5158
p2p_dbg(struct p2p_data * p2p,const char * fmt,...)5159 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
5160 {
5161 va_list ap;
5162 char buf[500];
5163
5164 if (!p2p->cfg->debug_print)
5165 return;
5166
5167 va_start(ap, fmt);
5168 vsnprintf(buf, sizeof(buf), fmt, ap);
5169 buf[sizeof(buf) - 1] = '\0';
5170 va_end(ap);
5171 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
5172 }
5173
5174
p2p_info(struct p2p_data * p2p,const char * fmt,...)5175 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
5176 {
5177 va_list ap;
5178 char buf[500];
5179
5180 if (!p2p->cfg->debug_print)
5181 return;
5182
5183 va_start(ap, fmt);
5184 vsnprintf(buf, sizeof(buf), fmt, ap);
5185 buf[sizeof(buf) - 1] = '\0';
5186 va_end(ap);
5187 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
5188 }
5189
5190
p2p_err(struct p2p_data * p2p,const char * fmt,...)5191 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
5192 {
5193 va_list ap;
5194 char buf[500];
5195
5196 if (!p2p->cfg->debug_print)
5197 return;
5198
5199 va_start(ap, fmt);
5200 vsnprintf(buf, sizeof(buf), fmt, ap);
5201 buf[sizeof(buf) - 1] = '\0';
5202 va_end(ap);
5203 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
5204 }
5205
5206
p2p_loop_on_known_peers(struct p2p_data * p2p,void (* peer_callback)(struct p2p_peer_info * peer,void * user_data),void * user_data)5207 void p2p_loop_on_known_peers(struct p2p_data *p2p,
5208 void (*peer_callback)(struct p2p_peer_info *peer,
5209 void *user_data),
5210 void *user_data)
5211 {
5212 struct p2p_device *dev, *n;
5213
5214 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
5215 peer_callback(&dev->info, user_data);
5216 }
5217 }
5218
5219
5220 #ifdef CONFIG_WPS_NFC
5221
p2p_build_nfc_handover(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5222 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
5223 int client_freq,
5224 const u8 *go_dev_addr,
5225 const u8 *ssid, size_t ssid_len)
5226 {
5227 struct wpabuf *buf;
5228 u8 op_class, channel;
5229 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
5230
5231 buf = wpabuf_alloc(1000);
5232 if (buf == NULL)
5233 return NULL;
5234
5235 op_class = p2p->cfg->reg_class;
5236 channel = p2p->cfg->channel;
5237
5238 p2p_buf_add_capability(buf, p2p->dev_capab &
5239 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
5240 p2p_buf_add_device_info(buf, p2p, NULL);
5241
5242 if (p2p->num_groups > 0) {
5243 int freq = p2p_group_get_freq(p2p->groups[0]);
5244 role = P2P_GO_IN_A_GROUP;
5245 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
5246 p2p_dbg(p2p,
5247 "Unknown GO operating frequency %d MHz for NFC handover",
5248 freq);
5249 wpabuf_free(buf);
5250 return NULL;
5251 }
5252 } else if (client_freq > 0) {
5253 role = P2P_CLIENT_IN_A_GROUP;
5254 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
5255 p2p_dbg(p2p,
5256 "Unknown client operating frequency %d MHz for NFC handover",
5257 client_freq);
5258 wpabuf_free(buf);
5259 return NULL;
5260 }
5261 }
5262
5263 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
5264 channel, role);
5265
5266 if (p2p->num_groups > 0) {
5267 /* Limit number of clients to avoid very long message */
5268 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
5269 p2p_group_buf_add_id(p2p->groups[0], buf);
5270 } else if (client_freq > 0 &&
5271 go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
5272 ssid && ssid_len > 0) {
5273 /*
5274 * Add the optional P2P Group ID to indicate in which group this
5275 * device is a P2P Client.
5276 */
5277 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
5278 }
5279
5280 return buf;
5281 }
5282
5283
p2p_build_nfc_handover_req(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5284 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
5285 int client_freq,
5286 const u8 *go_dev_addr,
5287 const u8 *ssid, size_t ssid_len)
5288 {
5289 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5290 ssid_len);
5291 }
5292
5293
p2p_build_nfc_handover_sel(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5294 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
5295 int client_freq,
5296 const u8 *go_dev_addr,
5297 const u8 *ssid, size_t ssid_len)
5298 {
5299 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5300 ssid_len);
5301 }
5302
5303
p2p_process_nfc_connection_handover(struct p2p_data * p2p,struct p2p_nfc_params * params)5304 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
5305 struct p2p_nfc_params *params)
5306 {
5307 struct p2p_message msg;
5308 struct p2p_device *dev;
5309 const u8 *p2p_dev_addr;
5310 int freq;
5311 enum p2p_role_indication role;
5312
5313 params->next_step = NO_ACTION;
5314
5315 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
5316 params->p2p_attr, params->p2p_len, &msg)) {
5317 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
5318 p2p_parse_free(&msg);
5319 return -1;
5320 }
5321
5322 if (msg.p2p_device_addr)
5323 p2p_dev_addr = msg.p2p_device_addr;
5324 else if (msg.device_id)
5325 p2p_dev_addr = msg.device_id;
5326 else {
5327 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
5328 p2p_parse_free(&msg);
5329 return -1;
5330 }
5331
5332 if (msg.oob_dev_password) {
5333 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
5334 msg.oob_dev_password_len);
5335 params->oob_dev_pw_len = msg.oob_dev_password_len;
5336 }
5337
5338 dev = p2p_create_device(p2p, p2p_dev_addr);
5339 if (dev == NULL) {
5340 p2p_parse_free(&msg);
5341 return -1;
5342 }
5343
5344 params->peer = &dev->info;
5345
5346 os_get_reltime(&dev->last_seen);
5347 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
5348 p2p_copy_wps_info(p2p, dev, 0, &msg);
5349
5350 if (!msg.oob_go_neg_channel) {
5351 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
5352 p2p_parse_free(&msg);
5353 return -1;
5354 }
5355
5356 if (msg.oob_go_neg_channel[3] == 0 &&
5357 msg.oob_go_neg_channel[4] == 0)
5358 freq = 0;
5359 else
5360 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
5361 msg.oob_go_neg_channel[4]);
5362 if (freq < 0) {
5363 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
5364 p2p_parse_free(&msg);
5365 return -1;
5366 }
5367 role = msg.oob_go_neg_channel[5];
5368
5369 if (role == P2P_GO_IN_A_GROUP) {
5370 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
5371 params->go_freq = freq;
5372 } else if (role == P2P_CLIENT_IN_A_GROUP) {
5373 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
5374 freq);
5375 params->go_freq = freq;
5376 } else
5377 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
5378 dev->oob_go_neg_freq = freq;
5379
5380 if (!params->sel && role != P2P_GO_IN_A_GROUP) {
5381 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
5382 p2p->cfg->channel);
5383 if (freq < 0) {
5384 p2p_dbg(p2p, "Own listen channel not known");
5385 p2p_parse_free(&msg);
5386 return -1;
5387 }
5388 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
5389 dev->oob_go_neg_freq = freq;
5390 }
5391
5392 if (msg.group_id) {
5393 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
5394 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
5395 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
5396 params->go_ssid_len);
5397 }
5398
5399 if (dev->flags & P2P_DEV_USER_REJECTED) {
5400 p2p_dbg(p2p, "Do not report rejected device");
5401 p2p_parse_free(&msg);
5402 return 0;
5403 }
5404
5405 if (!(dev->flags & P2P_DEV_REPORTED)) {
5406 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
5407 !(dev->flags & P2P_DEV_REPORTED_ONCE));
5408 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
5409 }
5410 p2p_parse_free(&msg);
5411
5412 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
5413 params->next_step = BOTH_GO;
5414 else if (role == P2P_GO_IN_A_GROUP)
5415 params->next_step = JOIN_GROUP;
5416 else if (role == P2P_CLIENT_IN_A_GROUP) {
5417 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
5418 params->next_step = PEER_CLIENT;
5419 } else if (p2p->num_groups > 0)
5420 params->next_step = AUTH_JOIN;
5421 else if (params->sel)
5422 params->next_step = INIT_GO_NEG;
5423 else
5424 params->next_step = RESP_GO_NEG;
5425
5426 return 0;
5427 }
5428
5429
p2p_set_authorized_oob_dev_pw_id(struct p2p_data * p2p,u16 dev_pw_id,int go_intent,const u8 * own_interface_addr)5430 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
5431 int go_intent,
5432 const u8 *own_interface_addr)
5433 {
5434
5435 p2p->authorized_oob_dev_pw_id = dev_pw_id;
5436 if (dev_pw_id == 0) {
5437 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
5438 return;
5439 }
5440
5441 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
5442 dev_pw_id);
5443
5444 p2p->go_intent = go_intent;
5445 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
5446 }
5447
5448 #endif /* CONFIG_WPS_NFC */
5449
5450
p2p_set_passphrase_len(struct p2p_data * p2p,unsigned int len)5451 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
5452 {
5453 if (len < 8 || len > 63)
5454 return -1;
5455 p2p->cfg->passphrase_len = len;
5456 return 0;
5457 }
5458
5459
p2p_set_vendor_elems(struct p2p_data * p2p,struct wpabuf ** vendor_elem)5460 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
5461 {
5462 p2p->vendor_elem = vendor_elem;
5463 }
5464
5465
p2p_go_neg_wait_timeout(void * eloop_ctx,void * timeout_ctx)5466 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
5467 {
5468 struct p2p_data *p2p = eloop_ctx;
5469
5470 p2p_dbg(p2p,
5471 "Timeout on waiting peer to become ready for GO Negotiation");
5472 p2p_go_neg_failed(p2p, -1);
5473 }
5474
5475
p2p_set_own_pref_freq_list(struct p2p_data * p2p,const unsigned int * pref_freq_list,unsigned int size)5476 void p2p_set_own_pref_freq_list(struct p2p_data *p2p,
5477 const unsigned int *pref_freq_list,
5478 unsigned int size)
5479 {
5480 unsigned int i;
5481
5482 if (size > P2P_MAX_PREF_CHANNELS)
5483 size = P2P_MAX_PREF_CHANNELS;
5484 p2p->num_pref_freq = size;
5485 for (i = 0; i < size; i++) {
5486 p2p->pref_freq_list[i] = pref_freq_list[i];
5487 p2p_dbg(p2p, "Own preferred frequency list[%u]=%u MHz",
5488 i, p2p->pref_freq_list[i]);
5489 }
5490 }
5491