1 /*
2 * Wi-Fi Direct - P2P module
3 * Copyright (c) 2009-2010, Atheros Communications
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/ieee802_11_common.h"
15 #include "common/wpa_ctrl.h"
16 #include "wps/wps_i.h"
17 #include "p2p_i.h"
18 #include "p2p.h"
19
20
21 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
22 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
23 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
24 const u8 *sa, const u8 *data, size_t len,
25 int rx_freq);
26 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
27 const u8 *sa, const u8 *data,
28 size_t len);
29 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
30 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
31
32
33 /*
34 * p2p_scan recovery timeout
35 *
36 * Many drivers are using 30 second timeout on scan results. Allow a bit larger
37 * timeout for this to avoid hitting P2P timeout unnecessarily.
38 */
39 #define P2P_SCAN_TIMEOUT 35
40
41 /**
42 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
43 * entries will be removed
44 */
45 #define P2P_PEER_EXPIRATION_AGE 300
46
47 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
48
p2p_expire_peers(struct p2p_data * p2p)49 static void p2p_expire_peers(struct p2p_data *p2p)
50 {
51 struct p2p_device *dev, *n;
52 struct os_time now;
53 size_t i;
54
55 os_get_time(&now);
56 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
57 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
58 continue;
59
60 if (p2p->cfg->go_connected &&
61 p2p->cfg->go_connected(p2p->cfg->cb_ctx,
62 dev->info.p2p_device_addr)) {
63 /*
64 * We are connected as a client to a group in which the
65 * peer is the GO, so do not expire the peer entry.
66 */
67 os_get_time(&dev->last_seen);
68 continue;
69 }
70
71 for (i = 0; i < p2p->num_groups; i++) {
72 if (p2p_group_is_client_connected(
73 p2p->groups[i], dev->info.p2p_device_addr))
74 break;
75 }
76 if (i < p2p->num_groups) {
77 /*
78 * The peer is connected as a client in a group where
79 * we are the GO, so do not expire the peer entry.
80 */
81 os_get_time(&dev->last_seen);
82 continue;
83 }
84
85 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Expiring old peer "
86 "entry " MACSTR, MAC2STR(dev->info.p2p_device_addr));
87 dl_list_del(&dev->list);
88 p2p_device_free(p2p, dev);
89 }
90 }
91
92
p2p_expiration_timeout(void * eloop_ctx,void * timeout_ctx)93 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
94 {
95 struct p2p_data *p2p = eloop_ctx;
96 p2p_expire_peers(p2p);
97 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
98 p2p_expiration_timeout, p2p, NULL);
99 }
100
101
p2p_state_txt(int state)102 static const char * p2p_state_txt(int state)
103 {
104 switch (state) {
105 case P2P_IDLE:
106 return "IDLE";
107 case P2P_SEARCH:
108 return "SEARCH";
109 case P2P_CONNECT:
110 return "CONNECT";
111 case P2P_CONNECT_LISTEN:
112 return "CONNECT_LISTEN";
113 case P2P_GO_NEG:
114 return "GO_NEG";
115 case P2P_LISTEN_ONLY:
116 return "LISTEN_ONLY";
117 case P2P_WAIT_PEER_CONNECT:
118 return "WAIT_PEER_CONNECT";
119 case P2P_WAIT_PEER_IDLE:
120 return "WAIT_PEER_IDLE";
121 case P2P_SD_DURING_FIND:
122 return "SD_DURING_FIND";
123 case P2P_PROVISIONING:
124 return "PROVISIONING";
125 case P2P_PD_DURING_FIND:
126 return "PD_DURING_FIND";
127 case P2P_INVITE:
128 return "INVITE";
129 case P2P_INVITE_LISTEN:
130 return "INVITE_LISTEN";
131 case P2P_SEARCH_WHEN_READY:
132 return "SEARCH_WHEN_READY";
133 case P2P_CONTINUE_SEARCH_WHEN_READY:
134 return "CONTINUE_SEARCH_WHEN_READY";
135 default:
136 return "?";
137 }
138 }
139
140
p2p_get_provisioning_info(struct p2p_data * p2p,const u8 * addr)141 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
142 {
143 struct p2p_device *dev = NULL;
144
145 if (!addr || !p2p)
146 return 0;
147
148 dev = p2p_get_device(p2p, addr);
149 if (dev)
150 return dev->wps_prov_info;
151 else
152 return 0;
153 }
154
155
p2p_clear_provisioning_info(struct p2p_data * p2p,const u8 * addr)156 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
157 {
158 struct p2p_device *dev = NULL;
159
160 if (!addr || !p2p)
161 return;
162
163 dev = p2p_get_device(p2p, addr);
164 if (dev)
165 dev->wps_prov_info = 0;
166 }
167
168
p2p_set_state(struct p2p_data * p2p,int new_state)169 void p2p_set_state(struct p2p_data *p2p, int new_state)
170 {
171 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: State %s -> %s",
172 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
173 p2p->state = new_state;
174 }
175
176
p2p_set_timeout(struct p2p_data * p2p,unsigned int sec,unsigned int usec)177 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
178 {
179 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
180 "P2P: Set timeout (state=%s): %u.%06u sec",
181 p2p_state_txt(p2p->state), sec, usec);
182 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
183 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
184 }
185
186
p2p_clear_timeout(struct p2p_data * p2p)187 void p2p_clear_timeout(struct p2p_data *p2p)
188 {
189 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Clear timeout (state=%s)",
190 p2p_state_txt(p2p->state));
191 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
192 }
193
194
p2p_go_neg_failed(struct p2p_data * p2p,struct p2p_device * peer,int status)195 void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer,
196 int status)
197 {
198 struct p2p_go_neg_results res;
199 p2p_clear_timeout(p2p);
200 p2p_set_state(p2p, P2P_IDLE);
201 if (p2p->go_neg_peer)
202 p2p->go_neg_peer->wps_method = WPS_NOT_READY;
203 p2p->go_neg_peer = NULL;
204
205 os_memset(&res, 0, sizeof(res));
206 res.status = status;
207 if (peer) {
208 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr,
209 ETH_ALEN);
210 os_memcpy(res.peer_interface_addr, peer->intended_addr,
211 ETH_ALEN);
212 }
213 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
214 }
215
216
p2p_listen_in_find(struct p2p_data * p2p,int dev_disc)217 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
218 {
219 unsigned int r, tu;
220 int freq;
221 struct wpabuf *ies;
222
223 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
224 "P2P: Starting short listen state (state=%s)",
225 p2p_state_txt(p2p->state));
226
227 freq = p2p_channel_to_freq(p2p->cfg->country, p2p->cfg->reg_class,
228 p2p->cfg->channel);
229 if (freq < 0) {
230 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
231 "P2P: Unknown regulatory class/channel");
232 return;
233 }
234
235 os_get_random((u8 *) &r, sizeof(r));
236 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
237 p2p->min_disc_int) * 100;
238 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
239 tu = p2p->max_disc_tu;
240 if (!dev_disc && tu < 100)
241 tu = 100; /* Need to wait in non-device discovery use cases */
242 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
243 tu = p2p->cfg->max_listen * 1000 / 1024;
244
245 if (tu == 0) {
246 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Skip listen state "
247 "since duration was 0 TU");
248 p2p_set_timeout(p2p, 0, 0);
249 return;
250 }
251
252 p2p->pending_listen_freq = freq;
253 p2p->pending_listen_sec = 0;
254 p2p->pending_listen_usec = 1024 * tu;
255
256 ies = p2p_build_probe_resp_ies(p2p);
257 if (ies == NULL)
258 return;
259
260 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
261 ies) < 0) {
262 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
263 "P2P: Failed to start listen mode");
264 p2p->pending_listen_freq = 0;
265 }
266 wpabuf_free(ies);
267 }
268
269
p2p_listen(struct p2p_data * p2p,unsigned int timeout)270 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
271 {
272 int freq;
273 struct wpabuf *ies;
274
275 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
276 "P2P: Going to listen(only) state");
277
278 freq = p2p_channel_to_freq(p2p->cfg->country, p2p->cfg->reg_class,
279 p2p->cfg->channel);
280 if (freq < 0) {
281 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
282 "P2P: Unknown regulatory class/channel");
283 return -1;
284 }
285
286 p2p->pending_listen_freq = freq;
287 p2p->pending_listen_sec = timeout / 1000;
288 p2p->pending_listen_usec = (timeout % 1000) * 1000;
289
290 if (p2p->p2p_scan_running) {
291 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
292 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
293 "P2P: p2p_scan running - connect is already "
294 "pending - skip listen");
295 return 0;
296 }
297 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
298 "P2P: p2p_scan running - delay start of listen state");
299 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
300 return 0;
301 }
302
303 ies = p2p_build_probe_resp_ies(p2p);
304 if (ies == NULL)
305 return -1;
306
307 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
308 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
309 "P2P: Failed to start listen mode");
310 p2p->pending_listen_freq = 0;
311 wpabuf_free(ies);
312 return -1;
313 }
314 wpabuf_free(ies);
315
316 p2p_set_state(p2p, P2P_LISTEN_ONLY);
317
318 return 0;
319 }
320
321
p2p_device_clear_reported(struct p2p_data * p2p)322 static void p2p_device_clear_reported(struct p2p_data *p2p)
323 {
324 struct p2p_device *dev;
325 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list)
326 dev->flags &= ~P2P_DEV_REPORTED;
327 }
328
329
330 /**
331 * p2p_get_device - Fetch a peer entry
332 * @p2p: P2P module context from p2p_init()
333 * @addr: P2P Device Address of the peer
334 * Returns: Pointer to the device entry or %NULL if not found
335 */
p2p_get_device(struct p2p_data * p2p,const u8 * addr)336 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
337 {
338 struct p2p_device *dev;
339 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
340 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
341 return dev;
342 }
343 return NULL;
344 }
345
346
347 /**
348 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
349 * @p2p: P2P module context from p2p_init()
350 * @addr: P2P Interface Address of the peer
351 * Returns: Pointer to the device entry or %NULL if not found
352 */
p2p_get_device_interface(struct p2p_data * p2p,const u8 * addr)353 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
354 const u8 *addr)
355 {
356 struct p2p_device *dev;
357 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
358 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
359 return dev;
360 }
361 return NULL;
362 }
363
364
365 /**
366 * p2p_create_device - Create a peer entry
367 * @p2p: P2P module context from p2p_init()
368 * @addr: P2P Device Address of the peer
369 * Returns: Pointer to the device entry or %NULL on failure
370 *
371 * If there is already an entry for the peer, it will be returned instead of
372 * creating a new one.
373 */
p2p_create_device(struct p2p_data * p2p,const u8 * addr)374 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
375 const u8 *addr)
376 {
377 struct p2p_device *dev, *oldest = NULL;
378 size_t count = 0;
379
380 dev = p2p_get_device(p2p, addr);
381 if (dev)
382 return dev;
383
384 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
385 count++;
386 if (oldest == NULL ||
387 os_time_before(&dev->last_seen, &oldest->last_seen))
388 oldest = dev;
389 }
390 if (count + 1 > p2p->cfg->max_peers && oldest) {
391 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
392 "P2P: Remove oldest peer entry to make room for a new "
393 "peer");
394 dl_list_del(&oldest->list);
395 p2p_device_free(p2p, oldest);
396 }
397
398 dev = os_zalloc(sizeof(*dev));
399 if (dev == NULL)
400 return NULL;
401 dl_list_add(&p2p->devices, &dev->list);
402 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
403
404 return dev;
405 }
406
407
p2p_copy_client_info(struct p2p_device * dev,struct p2p_client_info * cli)408 static void p2p_copy_client_info(struct p2p_device *dev,
409 struct p2p_client_info *cli)
410 {
411 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
412 dev->info.device_name[cli->dev_name_len] = '\0';
413 dev->info.dev_capab = cli->dev_capab;
414 dev->info.config_methods = cli->config_methods;
415 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
416 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
417 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
418 dev->info.wps_sec_dev_type_list_len);
419 }
420
421
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)422 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
423 const u8 *go_interface_addr, int freq,
424 const u8 *gi, size_t gi_len)
425 {
426 struct p2p_group_info info;
427 size_t c;
428 struct p2p_device *dev;
429
430 if (gi == NULL)
431 return 0;
432
433 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
434 return -1;
435
436 /*
437 * Clear old data for this group; if the devices are still in the
438 * group, the information will be restored in the loop following this.
439 */
440 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
441 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
442 ETH_ALEN) == 0) {
443 os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
444 os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
445 }
446 }
447
448 for (c = 0; c < info.num_clients; c++) {
449 struct p2p_client_info *cli = &info.client[c];
450 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
451 ETH_ALEN) == 0)
452 continue; /* ignore our own entry */
453 dev = p2p_get_device(p2p, cli->p2p_device_addr);
454 if (dev) {
455 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
456 P2P_DEV_PROBE_REQ_ONLY)) {
457 /*
458 * Update information since we have not
459 * received this directly from the client.
460 */
461 p2p_copy_client_info(dev, cli);
462 } else {
463 /*
464 * Need to update P2P Client Discoverability
465 * flag since it is valid only in P2P Group
466 * Info attribute.
467 */
468 dev->info.dev_capab &=
469 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
470 dev->info.dev_capab |=
471 cli->dev_capab &
472 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
473 }
474 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
475 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
476 }
477 } else {
478 dev = p2p_create_device(p2p, cli->p2p_device_addr);
479 if (dev == NULL)
480 continue;
481 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
482 p2p_copy_client_info(dev, cli);
483 dev->oper_freq = freq;
484 p2p->cfg->dev_found(p2p->cfg->cb_ctx,
485 dev->info.p2p_device_addr,
486 &dev->info, 1);
487 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
488 }
489
490 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
491 ETH_ALEN);
492 os_get_time(&dev->last_seen);
493 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
494 os_memcpy(dev->member_in_go_iface, go_interface_addr,
495 ETH_ALEN);
496 }
497
498 return 0;
499 }
500
501
p2p_copy_wps_info(struct p2p_device * dev,int probe_req,const struct p2p_message * msg)502 static void p2p_copy_wps_info(struct p2p_device *dev, int probe_req,
503 const struct p2p_message *msg)
504 {
505 os_memcpy(dev->info.device_name, msg->device_name,
506 sizeof(dev->info.device_name));
507
508 if (msg->manufacturer &&
509 msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
510 os_memset(dev->info.manufacturer, 0,
511 sizeof(dev->info.manufacturer));
512 os_memcpy(dev->info.manufacturer, msg->manufacturer,
513 msg->manufacturer_len);
514 }
515
516 if (msg->model_name &&
517 msg->model_name_len < sizeof(dev->info.model_name)) {
518 os_memset(dev->info.model_name, 0,
519 sizeof(dev->info.model_name));
520 os_memcpy(dev->info.model_name, msg->model_name,
521 msg->model_name_len);
522 }
523
524 if (msg->model_number &&
525 msg->model_number_len < sizeof(dev->info.model_number)) {
526 os_memset(dev->info.model_number, 0,
527 sizeof(dev->info.model_number));
528 os_memcpy(dev->info.model_number, msg->model_number,
529 msg->model_number_len);
530 }
531
532 if (msg->serial_number &&
533 msg->serial_number_len < sizeof(dev->info.serial_number)) {
534 os_memset(dev->info.serial_number, 0,
535 sizeof(dev->info.serial_number));
536 os_memcpy(dev->info.serial_number, msg->serial_number,
537 msg->serial_number_len);
538 }
539
540 if (msg->pri_dev_type)
541 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
542 sizeof(dev->info.pri_dev_type));
543 else if (msg->wps_pri_dev_type)
544 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
545 sizeof(dev->info.pri_dev_type));
546
547 if (msg->wps_sec_dev_type_list) {
548 os_memcpy(dev->info.wps_sec_dev_type_list,
549 msg->wps_sec_dev_type_list,
550 msg->wps_sec_dev_type_list_len);
551 dev->info.wps_sec_dev_type_list_len =
552 msg->wps_sec_dev_type_list_len;
553 }
554
555 if (msg->capability) {
556 /*
557 * P2P Client Discoverability bit is reserved in all frames
558 * that use this function, so do not change its value here.
559 */
560 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
561 dev->info.dev_capab |= msg->capability[0] &
562 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
563 dev->info.group_capab = msg->capability[1];
564 }
565
566 if (msg->ext_listen_timing) {
567 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
568 dev->ext_listen_interval =
569 WPA_GET_LE16(msg->ext_listen_timing + 2);
570 }
571
572 if (!probe_req) {
573 dev->info.config_methods = msg->config_methods ?
574 msg->config_methods : msg->wps_config_methods;
575 }
576 }
577
578
579 /**
580 * p2p_add_device - Add peer entries based on scan results or P2P frames
581 * @p2p: P2P module context from p2p_init()
582 * @addr: Source address of Beacon or Probe Response frame (may be either
583 * P2P Device Address or P2P Interface Address)
584 * @level: Signal level (signal strength of the received frame from the peer)
585 * @freq: Frequency on which the Beacon or Probe Response frame was received
586 * @age_ms: Age of the information in milliseconds
587 * @ies: IEs from the Beacon or Probe Response frame
588 * @ies_len: Length of ies buffer in octets
589 * @scan_res: Whether this was based on scan results
590 * Returns: 0 on success, -1 on failure
591 *
592 * If the scan result is for a GO, the clients in the group will also be added
593 * to the peer table. This function can also be used with some other frames
594 * like Provision Discovery Request that contains P2P Capability and P2P Device
595 * Info attributes.
596 */
p2p_add_device(struct p2p_data * p2p,const u8 * addr,int freq,unsigned int age_ms,int level,const u8 * ies,size_t ies_len,int scan_res)597 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
598 unsigned int age_ms, int level, const u8 *ies,
599 size_t ies_len, int scan_res)
600 {
601 struct p2p_device *dev;
602 struct p2p_message msg;
603 const u8 *p2p_dev_addr;
604 int i;
605 struct os_time time_now, time_tmp_age, entry_ts;
606
607 os_memset(&msg, 0, sizeof(msg));
608 if (p2p_parse_ies(ies, ies_len, &msg)) {
609 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
610 "P2P: Failed to parse P2P IE for a device entry");
611 p2p_parse_free(&msg);
612 return -1;
613 }
614
615 if (msg.p2p_device_addr)
616 p2p_dev_addr = msg.p2p_device_addr;
617 else if (msg.device_id)
618 p2p_dev_addr = msg.device_id;
619 else {
620 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
621 "P2P: Ignore scan data without P2P Device Info or "
622 "P2P Device Id");
623 p2p_parse_free(&msg);
624 return -1;
625 }
626
627 if (!is_zero_ether_addr(p2p->peer_filter) &&
628 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
629 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Do not add peer "
630 "filter for " MACSTR " due to peer filter",
631 MAC2STR(p2p_dev_addr));
632 p2p_parse_free(&msg);
633 return 0;
634 }
635
636 dev = p2p_create_device(p2p, p2p_dev_addr);
637 if (dev == NULL) {
638 p2p_parse_free(&msg);
639 return -1;
640 }
641
642 os_get_time(&time_now);
643 time_tmp_age.sec = age_ms / 1000;
644 time_tmp_age.usec = (age_ms % 1000) * 1000;
645 os_time_sub(&time_now, &time_tmp_age, &entry_ts);
646
647 /*
648 * Update the device entry only if the new peer
649 * entry is newer than the one previously stored.
650 */
651 if (dev->last_seen.usec > 0 &&
652 os_time_before(&entry_ts, &dev->last_seen)) {
653 p2p_parse_free(&msg);
654 return -1;
655 }
656
657 os_memcpy(&dev->last_seen, &entry_ts, sizeof(struct os_time));
658
659 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
660
661 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
662 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
663 if (msg.ssid &&
664 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
665 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
666 != 0)) {
667 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
668 dev->oper_ssid_len = msg.ssid[1];
669 }
670
671 if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
672 *msg.ds_params >= 1 && *msg.ds_params <= 14) {
673 int ds_freq;
674 if (*msg.ds_params == 14)
675 ds_freq = 2484;
676 else
677 ds_freq = 2407 + *msg.ds_params * 5;
678 if (freq != ds_freq) {
679 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
680 "P2P: Update Listen frequency based on DS "
681 "Parameter Set IE: %d -> %d MHz",
682 freq, ds_freq);
683 freq = ds_freq;
684 }
685 }
686
687 if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
688 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
689 "P2P: Update Listen frequency based on scan "
690 "results (" MACSTR " %d -> %d MHz (DS param %d)",
691 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
692 freq, msg.ds_params ? *msg.ds_params : -1);
693 }
694 if (scan_res) {
695 dev->listen_freq = freq;
696 if (msg.group_info)
697 dev->oper_freq = freq;
698 }
699 dev->info.level = level;
700
701 p2p_copy_wps_info(dev, 0, &msg);
702
703 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
704 wpabuf_free(dev->info.wps_vendor_ext[i]);
705 dev->info.wps_vendor_ext[i] = NULL;
706 }
707
708 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
709 if (msg.wps_vendor_ext[i] == NULL)
710 break;
711 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
712 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
713 if (dev->info.wps_vendor_ext[i] == NULL)
714 break;
715 }
716
717 if (msg.wfd_subelems) {
718 wpabuf_free(dev->info.wfd_subelems);
719 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
720 }
721
722 if (scan_res) {
723 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
724 msg.group_info, msg.group_info_len);
725 }
726
727 p2p_parse_free(&msg);
728
729 if (p2p_pending_sd_req(p2p, dev))
730 dev->flags |= P2P_DEV_SD_SCHEDULE;
731
732 if (dev->flags & P2P_DEV_REPORTED)
733 return 0;
734
735 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
736 "P2P: Peer found with Listen frequency %d MHz", freq);
737 if (dev->flags & P2P_DEV_USER_REJECTED) {
738 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
739 "P2P: Do not report rejected device");
740 return 0;
741 }
742
743 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
744 !(dev->flags & P2P_DEV_REPORTED_ONCE));
745 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
746
747 return 0;
748 }
749
750
p2p_device_free(struct p2p_data * p2p,struct p2p_device * dev)751 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
752 {
753 int i;
754
755 if (p2p->go_neg_peer == dev) {
756 /*
757 * If GO Negotiation is in progress, report that it has failed.
758 */
759 p2p_go_neg_failed(p2p, dev, -1);
760 p2p->go_neg_peer = NULL;
761 }
762 if (p2p->invite_peer == dev)
763 p2p->invite_peer = NULL;
764 if (p2p->sd_peer == dev)
765 p2p->sd_peer = NULL;
766 if (p2p->pending_client_disc_go == dev)
767 p2p->pending_client_disc_go = NULL;
768
769 /* dev_lost() device, but only if it was previously dev_found() */
770 if (dev->flags & P2P_DEV_REPORTED_ONCE)
771 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
772 dev->info.p2p_device_addr);
773
774 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
775 wpabuf_free(dev->info.wps_vendor_ext[i]);
776 dev->info.wps_vendor_ext[i] = NULL;
777 }
778
779 wpabuf_free(dev->info.wfd_subelems);
780
781 os_free(dev);
782 }
783
784
p2p_get_next_prog_freq(struct p2p_data * p2p)785 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
786 {
787 struct p2p_channels *c;
788 struct p2p_reg_class *cla;
789 size_t cl, ch;
790 int found = 0;
791 u8 reg_class;
792 u8 channel;
793 int freq;
794
795 c = &p2p->cfg->channels;
796 for (cl = 0; cl < c->reg_classes; cl++) {
797 cla = &c->reg_class[cl];
798 if (cla->reg_class != p2p->last_prog_scan_class)
799 continue;
800 for (ch = 0; ch < cla->channels; ch++) {
801 if (cla->channel[ch] == p2p->last_prog_scan_chan) {
802 found = 1;
803 break;
804 }
805 }
806 if (found)
807 break;
808 }
809
810 if (!found) {
811 /* Start from beginning */
812 reg_class = c->reg_class[0].reg_class;
813 channel = c->reg_class[0].channel[0];
814 } else {
815 /* Pick the next channel */
816 ch++;
817 if (ch == cla->channels) {
818 cl++;
819 if (cl == c->reg_classes)
820 cl = 0;
821 ch = 0;
822 }
823 reg_class = c->reg_class[cl].reg_class;
824 channel = c->reg_class[cl].channel[ch];
825 }
826
827 freq = p2p_channel_to_freq(p2p->cfg->country, reg_class, channel);
828 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Next progressive search "
829 "channel: reg_class %u channel %u -> %d MHz",
830 reg_class, channel, freq);
831 p2p->last_prog_scan_class = reg_class;
832 p2p->last_prog_scan_chan = channel;
833
834 if (freq == 2412 || freq == 2437 || freq == 2462)
835 return 0; /* No need to add social channels */
836 return freq;
837 }
838
839
p2p_search(struct p2p_data * p2p)840 static void p2p_search(struct p2p_data *p2p)
841 {
842 int freq = 0;
843 enum p2p_scan_type type;
844 u16 pw_id = DEV_PW_DEFAULT;
845 int res;
846
847 if (p2p->drv_in_listen) {
848 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver is still "
849 "in Listen state - wait for it to end before "
850 "continuing");
851 return;
852 }
853 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
854
855 if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
856 (freq = p2p_get_next_prog_freq(p2p)) > 0) {
857 type = P2P_SCAN_SOCIAL_PLUS_ONE;
858 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search "
859 "(+ freq %u)", freq);
860 } else {
861 type = P2P_SCAN_SOCIAL;
862 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search");
863 }
864
865 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
866 p2p->num_req_dev_types, p2p->req_dev_types,
867 p2p->find_dev_id, pw_id);
868 if (res < 0) {
869 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
870 "P2P: Scan request failed");
871 p2p_continue_find(p2p);
872 } else if (res == 1) {
873 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Could not start "
874 "p2p_scan at this point - will try again after "
875 "previous scan completes");
876 p2p_set_state(p2p, P2P_CONTINUE_SEARCH_WHEN_READY);
877 } else {
878 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Running p2p_scan");
879 p2p->p2p_scan_running = 1;
880 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
881 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
882 p2p, NULL);
883 }
884 }
885
886
p2p_find_timeout(void * eloop_ctx,void * timeout_ctx)887 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
888 {
889 struct p2p_data *p2p = eloop_ctx;
890 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Find timeout -> stop");
891 p2p_stop_find(p2p);
892 }
893
894
p2p_run_after_scan(struct p2p_data * p2p)895 static int p2p_run_after_scan(struct p2p_data *p2p)
896 {
897 struct p2p_device *dev;
898 enum p2p_after_scan op;
899
900 if (p2p->after_scan_tx) {
901 /* TODO: schedule p2p_run_after_scan to be called from TX
902 * status callback(?) */
903 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send pending "
904 "Action frame at p2p_scan completion");
905 p2p->cfg->send_action(p2p->cfg->cb_ctx,
906 p2p->after_scan_tx->freq,
907 p2p->after_scan_tx->dst,
908 p2p->after_scan_tx->src,
909 p2p->after_scan_tx->bssid,
910 (u8 *) (p2p->after_scan_tx + 1),
911 p2p->after_scan_tx->len,
912 p2p->after_scan_tx->wait_time);
913 os_free(p2p->after_scan_tx);
914 p2p->after_scan_tx = NULL;
915 return 1;
916 }
917
918 op = p2p->start_after_scan;
919 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
920 switch (op) {
921 case P2P_AFTER_SCAN_NOTHING:
922 break;
923 case P2P_AFTER_SCAN_LISTEN:
924 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Start previously "
925 "requested Listen state");
926 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
927 p2p->pending_listen_usec / 1000);
928 return 1;
929 case P2P_AFTER_SCAN_CONNECT:
930 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Start previously "
931 "requested connect with " MACSTR,
932 MAC2STR(p2p->after_scan_peer));
933 dev = p2p_get_device(p2p, p2p->after_scan_peer);
934 if (dev == NULL) {
935 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer not "
936 "known anymore");
937 break;
938 }
939 p2p_connect_send(p2p, dev);
940 return 1;
941 }
942
943 return 0;
944 }
945
946
p2p_scan_timeout(void * eloop_ctx,void * timeout_ctx)947 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
948 {
949 struct p2p_data *p2p = eloop_ctx;
950 int running;
951 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan timeout "
952 "(running=%d)", p2p->p2p_scan_running);
953 running = p2p->p2p_scan_running;
954 /* Make sure we recover from missed scan results callback */
955 p2p->p2p_scan_running = 0;
956
957 if (running)
958 p2p_run_after_scan(p2p);
959 }
960
961
p2p_free_req_dev_types(struct p2p_data * p2p)962 static void p2p_free_req_dev_types(struct p2p_data *p2p)
963 {
964 p2p->num_req_dev_types = 0;
965 os_free(p2p->req_dev_types);
966 p2p->req_dev_types = NULL;
967 }
968
969
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)970 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
971 enum p2p_discovery_type type,
972 unsigned int num_req_dev_types, const u8 *req_dev_types,
973 const u8 *dev_id, unsigned int search_delay)
974 {
975 int res;
976
977 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting find (type=%d)",
978 type);
979 if (p2p->p2p_scan_running) {
980 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan is "
981 "already running");
982 }
983
984 p2p_free_req_dev_types(p2p);
985 if (req_dev_types && num_req_dev_types) {
986 p2p->req_dev_types = os_malloc(num_req_dev_types *
987 WPS_DEV_TYPE_LEN);
988 if (p2p->req_dev_types == NULL)
989 return -1;
990 os_memcpy(p2p->req_dev_types, req_dev_types,
991 num_req_dev_types * WPS_DEV_TYPE_LEN);
992 p2p->num_req_dev_types = num_req_dev_types;
993 }
994
995 if (dev_id) {
996 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
997 p2p->find_dev_id = p2p->find_dev_id_buf;
998 } else
999 p2p->find_dev_id = NULL;
1000
1001 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1002 p2p_clear_timeout(p2p);
1003 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1004 p2p->find_type = type;
1005 p2p_device_clear_reported(p2p);
1006 p2p_set_state(p2p, P2P_SEARCH);
1007 p2p->search_delay = search_delay;
1008 p2p->in_search_delay = 0;
1009 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1010 p2p->last_p2p_find_timeout = timeout;
1011 if (timeout)
1012 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1013 p2p, NULL);
1014 switch (type) {
1015 case P2P_FIND_START_WITH_FULL:
1016 case P2P_FIND_PROGRESSIVE:
1017 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1018 p2p->num_req_dev_types,
1019 p2p->req_dev_types, dev_id,
1020 DEV_PW_DEFAULT);
1021 break;
1022 case P2P_FIND_ONLY_SOCIAL:
1023 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1024 p2p->num_req_dev_types,
1025 p2p->req_dev_types, dev_id,
1026 DEV_PW_DEFAULT);
1027 break;
1028 default:
1029 return -1;
1030 }
1031
1032 if (res == 0) {
1033 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Running p2p_scan");
1034 p2p->p2p_scan_running = 1;
1035 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1036 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1037 p2p, NULL);
1038 } else if (res == 1) {
1039 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Could not start "
1040 "p2p_scan at this point - will try again after "
1041 "previous scan completes");
1042 res = 0;
1043 p2p_set_state(p2p, P2P_SEARCH_WHEN_READY);
1044 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1045 } else {
1046 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Failed to start "
1047 "p2p_scan");
1048 p2p_set_state(p2p, P2P_IDLE);
1049 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1050 }
1051
1052 return res;
1053 }
1054
1055
p2p_other_scan_completed(struct p2p_data * p2p)1056 int p2p_other_scan_completed(struct p2p_data *p2p)
1057 {
1058 if (p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY) {
1059 p2p_set_state(p2p, P2P_SEARCH);
1060 p2p_search(p2p);
1061 return 1;
1062 }
1063 if (p2p->state != P2P_SEARCH_WHEN_READY)
1064 return 0;
1065 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting pending P2P find "
1066 "now that previous scan was completed");
1067 if (p2p_find(p2p, p2p->last_p2p_find_timeout, p2p->find_type,
1068 p2p->num_req_dev_types, p2p->req_dev_types,
1069 p2p->find_dev_id, p2p->search_delay) < 0)
1070 return 0;
1071 return 1;
1072 }
1073
1074
p2p_stop_find_for_freq(struct p2p_data * p2p,int freq)1075 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1076 {
1077 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Stopping find");
1078 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1079 p2p_clear_timeout(p2p);
1080 if (p2p->state == P2P_SEARCH)
1081 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, P2P_EVENT_FIND_STOPPED);
1082 p2p_set_state(p2p, P2P_IDLE);
1083 p2p_free_req_dev_types(p2p);
1084 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1085 p2p->go_neg_peer = NULL;
1086 p2p->sd_peer = NULL;
1087 p2p->invite_peer = NULL;
1088 p2p_stop_listen_for_freq(p2p, freq);
1089 }
1090
1091
p2p_stop_listen_for_freq(struct p2p_data * p2p,int freq)1092 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1093 {
1094 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1095 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Skip stop_listen "
1096 "since we are on correct channel for response");
1097 return;
1098 }
1099 if (p2p->in_listen) {
1100 p2p->in_listen = 0;
1101 p2p_clear_timeout(p2p);
1102 }
1103 if (p2p->drv_in_listen) {
1104 /*
1105 * The driver may not deliver callback to p2p_listen_end()
1106 * when the operation gets canceled, so clear the internal
1107 * variable that is tracking driver state.
1108 */
1109 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Clear "
1110 "drv_in_listen (%d)", p2p->drv_in_listen);
1111 p2p->drv_in_listen = 0;
1112 }
1113 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1114 }
1115
1116
p2p_stop_find(struct p2p_data * p2p)1117 void p2p_stop_find(struct p2p_data *p2p)
1118 {
1119 p2p_stop_find_for_freq(p2p, 0);
1120 }
1121
1122
p2p_prepare_channel_pref(struct p2p_data * p2p,unsigned int force_freq,unsigned int pref_freq)1123 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1124 unsigned int force_freq,
1125 unsigned int pref_freq)
1126 {
1127 u8 op_class, op_channel;
1128 unsigned int freq = force_freq ? force_freq : pref_freq;
1129
1130 if (p2p_freq_to_channel(p2p->cfg->country, freq,
1131 &op_class, &op_channel) < 0) {
1132 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1133 "P2P: Unsupported frequency %u MHz", freq);
1134 return -1;
1135 }
1136
1137 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel)) {
1138 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1139 "P2P: Frequency %u MHz (oper_class %u channel %u) not "
1140 "allowed for P2P", freq, op_class, op_channel);
1141 return -1;
1142 }
1143
1144 p2p->op_reg_class = op_class;
1145 p2p->op_channel = op_channel;
1146
1147 if (force_freq) {
1148 p2p->channels.reg_classes = 1;
1149 p2p->channels.reg_class[0].channels = 1;
1150 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1151 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1152 } else {
1153 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1154 sizeof(struct p2p_channels));
1155 }
1156
1157 return 0;
1158 }
1159
1160
p2p_prepare_channel_best(struct p2p_data * p2p)1161 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1162 {
1163 u8 op_class, op_channel;
1164
1165 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1166 p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1167 p2p_freq_to_channel(p2p->cfg->country, p2p->best_freq_overall,
1168 &op_class, &op_channel) == 0) {
1169 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Select best "
1170 "overall channel as operating channel preference");
1171 p2p->op_reg_class = op_class;
1172 p2p->op_channel = op_channel;
1173 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1174 p2p_supported_freq(p2p, p2p->best_freq_5) &&
1175 p2p_freq_to_channel(p2p->cfg->country, p2p->best_freq_5,
1176 &op_class, &op_channel) == 0) {
1177 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Select best 5 GHz "
1178 "channel as operating channel preference");
1179 p2p->op_reg_class = op_class;
1180 p2p->op_channel = op_channel;
1181 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1182 p2p_supported_freq(p2p, p2p->best_freq_24) &&
1183 p2p_freq_to_channel(p2p->cfg->country, p2p->best_freq_24,
1184 &op_class, &op_channel) == 0) {
1185 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Select best 2.4 "
1186 "GHz channel as operating channel preference");
1187 p2p->op_reg_class = op_class;
1188 p2p->op_channel = op_channel;
1189 } else {
1190 p2p->op_reg_class = p2p->cfg->op_reg_class;
1191 p2p->op_channel = p2p->cfg->op_channel;
1192 }
1193
1194 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1195 sizeof(struct p2p_channels));
1196 }
1197
1198
1199 /**
1200 * p2p_prepare_channel - Select operating channel for GO Negotiation
1201 * @p2p: P2P module context from p2p_init()
1202 * @dev: Selected peer device
1203 * @force_freq: Forced frequency in MHz or 0 if not forced
1204 * @pref_freq: Preferred frequency in MHz or 0 if no preference
1205 * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1206 *
1207 * This function is used to do initial operating channel selection for GO
1208 * Negotiation prior to having received peer information. The selected channel
1209 * may be further optimized in p2p_reselect_channel() once the peer information
1210 * is available.
1211 */
p2p_prepare_channel(struct p2p_data * p2p,struct p2p_device * dev,unsigned int force_freq,unsigned int pref_freq)1212 static int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1213 unsigned int force_freq, unsigned int pref_freq)
1214 {
1215 if (force_freq || pref_freq) {
1216 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq) < 0)
1217 return -1;
1218 } else {
1219 p2p_prepare_channel_best(p2p);
1220 }
1221 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1222 "P2P: Own preference for operation channel: "
1223 "Operating Class %u Channel %u%s",
1224 p2p->op_reg_class, p2p->op_channel,
1225 force_freq ? " (forced)" : "");
1226
1227 if (force_freq)
1228 dev->flags |= P2P_DEV_FORCE_FREQ;
1229 else
1230 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1231
1232 return 0;
1233 }
1234
1235
p2p_set_dev_persistent(struct p2p_device * dev,int persistent_group)1236 static void p2p_set_dev_persistent(struct p2p_device *dev,
1237 int persistent_group)
1238 {
1239 switch (persistent_group) {
1240 case 0:
1241 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1242 P2P_DEV_PREFER_PERSISTENT_RECONN);
1243 break;
1244 case 1:
1245 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1246 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1247 break;
1248 case 2:
1249 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1250 P2P_DEV_PREFER_PERSISTENT_RECONN;
1251 break;
1252 }
1253 }
1254
1255
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)1256 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1257 enum p2p_wps_method wps_method,
1258 int go_intent, const u8 *own_interface_addr,
1259 unsigned int force_freq, int persistent_group,
1260 const u8 *force_ssid, size_t force_ssid_len,
1261 int pd_before_go_neg, unsigned int pref_freq)
1262 {
1263 struct p2p_device *dev;
1264
1265 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1266 "P2P: Request to start group negotiation - peer=" MACSTR
1267 " GO Intent=%d Intended Interface Address=" MACSTR
1268 " wps_method=%d persistent_group=%d pd_before_go_neg=%d",
1269 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1270 wps_method, persistent_group, pd_before_go_neg);
1271
1272 dev = p2p_get_device(p2p, peer_addr);
1273 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1274 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1275 "P2P: Cannot connect to unknown P2P Device " MACSTR,
1276 MAC2STR(peer_addr));
1277 return -1;
1278 }
1279
1280 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq) < 0)
1281 return -1;
1282
1283 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1284 if (!(dev->info.dev_capab &
1285 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1286 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1287 "P2P: Cannot connect to P2P Device " MACSTR
1288 " that is in a group and is not discoverable",
1289 MAC2STR(peer_addr));
1290 return -1;
1291 }
1292 if (dev->oper_freq <= 0) {
1293 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1294 "P2P: Cannot connect to P2P Device " MACSTR
1295 " with incomplete information",
1296 MAC2STR(peer_addr));
1297 return -1;
1298 }
1299
1300 /*
1301 * First, try to connect directly. If the peer does not
1302 * acknowledge frames, assume it is sleeping and use device
1303 * discoverability via the GO at that point.
1304 */
1305 }
1306
1307 p2p->ssid_set = 0;
1308 if (force_ssid) {
1309 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1310 force_ssid, force_ssid_len);
1311 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1312 p2p->ssid_len = force_ssid_len;
1313 p2p->ssid_set = 1;
1314 }
1315
1316 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1317 dev->flags &= ~P2P_DEV_USER_REJECTED;
1318 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1319 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1320 if (pd_before_go_neg)
1321 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1322 else
1323 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1324 dev->connect_reqs = 0;
1325 dev->go_neg_req_sent = 0;
1326 dev->go_state = UNKNOWN_GO;
1327 p2p_set_dev_persistent(dev, persistent_group);
1328 p2p->go_intent = go_intent;
1329 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1330
1331 if (p2p->state != P2P_IDLE)
1332 p2p_stop_find(p2p);
1333
1334 if (p2p->after_scan_tx) {
1335 /*
1336 * We need to drop the pending frame to avoid issues with the
1337 * new GO Negotiation, e.g., when the pending frame was from a
1338 * previous attempt at starting a GO Negotiation.
1339 */
1340 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Dropped "
1341 "previous pending Action frame TX that was waiting "
1342 "for p2p_scan completion");
1343 os_free(p2p->after_scan_tx);
1344 p2p->after_scan_tx = NULL;
1345 }
1346
1347 dev->wps_method = wps_method;
1348 dev->status = P2P_SC_SUCCESS;
1349
1350 if (p2p->p2p_scan_running) {
1351 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1352 "P2P: p2p_scan running - delay connect send");
1353 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1354 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1355 return 0;
1356 }
1357 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1358
1359 return p2p_connect_send(p2p, dev);
1360 }
1361
1362
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)1363 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1364 enum p2p_wps_method wps_method,
1365 int go_intent, const u8 *own_interface_addr,
1366 unsigned int force_freq, int persistent_group,
1367 const u8 *force_ssid, size_t force_ssid_len,
1368 unsigned int pref_freq)
1369 {
1370 struct p2p_device *dev;
1371
1372 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1373 "P2P: Request to authorize group negotiation - peer=" MACSTR
1374 " GO Intent=%d Intended Interface Address=" MACSTR
1375 " wps_method=%d persistent_group=%d",
1376 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1377 wps_method, persistent_group);
1378
1379 dev = p2p_get_device(p2p, peer_addr);
1380 if (dev == NULL) {
1381 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1382 "P2P: Cannot authorize unknown P2P Device " MACSTR,
1383 MAC2STR(peer_addr));
1384 return -1;
1385 }
1386
1387 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq) < 0)
1388 return -1;
1389
1390 p2p->ssid_set = 0;
1391 if (force_ssid) {
1392 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1393 force_ssid, force_ssid_len);
1394 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1395 p2p->ssid_len = force_ssid_len;
1396 p2p->ssid_set = 1;
1397 }
1398
1399 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1400 dev->flags &= ~P2P_DEV_USER_REJECTED;
1401 dev->go_neg_req_sent = 0;
1402 dev->go_state = UNKNOWN_GO;
1403 p2p_set_dev_persistent(dev, persistent_group);
1404 p2p->go_intent = go_intent;
1405 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1406
1407 dev->wps_method = wps_method;
1408 dev->status = P2P_SC_SUCCESS;
1409
1410 return 0;
1411 }
1412
1413
p2p_add_dev_info(struct p2p_data * p2p,const u8 * addr,struct p2p_device * dev,struct p2p_message * msg)1414 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1415 struct p2p_device *dev, struct p2p_message *msg)
1416 {
1417 os_get_time(&dev->last_seen);
1418
1419 p2p_copy_wps_info(dev, 0, msg);
1420
1421 if (msg->listen_channel) {
1422 int freq;
1423 freq = p2p_channel_to_freq((char *) msg->listen_channel,
1424 msg->listen_channel[3],
1425 msg->listen_channel[4]);
1426 if (freq < 0) {
1427 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1428 "P2P: Unknown peer Listen channel: "
1429 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1430 msg->listen_channel[0],
1431 msg->listen_channel[1],
1432 msg->listen_channel[2],
1433 msg->listen_channel[3],
1434 msg->listen_channel[4]);
1435 } else {
1436 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Update "
1437 "peer " MACSTR " Listen channel: %u -> %u MHz",
1438 MAC2STR(dev->info.p2p_device_addr),
1439 dev->listen_freq, freq);
1440 dev->listen_freq = freq;
1441 }
1442 }
1443
1444 if (msg->wfd_subelems) {
1445 wpabuf_free(dev->info.wfd_subelems);
1446 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1447 }
1448
1449 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1450 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1451 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1452 "P2P: Completed device entry based on data from "
1453 "GO Negotiation Request");
1454 } else {
1455 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1456 "P2P: Created device entry based on GO Neg Req: "
1457 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1458 "listen_freq=%d",
1459 MAC2STR(dev->info.p2p_device_addr),
1460 dev->info.dev_capab, dev->info.group_capab,
1461 dev->info.device_name, dev->listen_freq);
1462 }
1463
1464 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1465
1466 if (dev->flags & P2P_DEV_USER_REJECTED) {
1467 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1468 "P2P: Do not report rejected device");
1469 return;
1470 }
1471
1472 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1473 !(dev->flags & P2P_DEV_REPORTED_ONCE));
1474 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1475 }
1476
1477
p2p_build_ssid(struct p2p_data * p2p,u8 * ssid,size_t * ssid_len)1478 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1479 {
1480 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1481 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1482 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1483 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1484 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1485 }
1486
1487
p2p_go_params(struct p2p_data * p2p,struct p2p_go_neg_results * params)1488 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1489 {
1490 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len);
1491 p2p_random(params->passphrase, 8);
1492 return 0;
1493 }
1494
1495
p2p_go_complete(struct p2p_data * p2p,struct p2p_device * peer)1496 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1497 {
1498 struct p2p_go_neg_results res;
1499 int go = peer->go_state == LOCAL_GO;
1500 struct p2p_channels intersection;
1501 int freqs;
1502 size_t i, j;
1503
1504 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1505 "P2P: GO Negotiation with " MACSTR " completed (%s will be "
1506 "GO)", MAC2STR(peer->info.p2p_device_addr),
1507 go ? "local end" : "peer");
1508
1509 os_memset(&res, 0, sizeof(res));
1510 res.role_go = go;
1511 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1512 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1513 res.wps_method = peer->wps_method;
1514 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1515 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1516 res.persistent_group = 2;
1517 else
1518 res.persistent_group = 1;
1519 }
1520
1521 if (go) {
1522 /* Setup AP mode for WPS provisioning */
1523 res.freq = p2p_channel_to_freq(p2p->cfg->country,
1524 p2p->op_reg_class,
1525 p2p->op_channel);
1526 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1527 res.ssid_len = p2p->ssid_len;
1528 p2p_random(res.passphrase, 8);
1529 } else {
1530 res.freq = peer->oper_freq;
1531 if (p2p->ssid_len) {
1532 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1533 res.ssid_len = p2p->ssid_len;
1534 }
1535 }
1536
1537 p2p_channels_intersect(&p2p->channels, &peer->channels,
1538 &intersection);
1539 freqs = 0;
1540 for (i = 0; i < intersection.reg_classes; i++) {
1541 struct p2p_reg_class *c = &intersection.reg_class[i];
1542 if (freqs + 1 == P2P_MAX_CHANNELS)
1543 break;
1544 for (j = 0; j < c->channels; j++) {
1545 int freq;
1546 if (freqs + 1 == P2P_MAX_CHANNELS)
1547 break;
1548 freq = p2p_channel_to_freq(peer->country, c->reg_class,
1549 c->channel[j]);
1550 if (freq < 0)
1551 continue;
1552 res.freq_list[freqs++] = freq;
1553 }
1554 }
1555
1556 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1557
1558 p2p_clear_timeout(p2p);
1559 p2p->ssid_set = 0;
1560 peer->go_neg_req_sent = 0;
1561 peer->wps_method = WPS_NOT_READY;
1562
1563 p2p_set_state(p2p, P2P_PROVISIONING);
1564 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1565 }
1566
1567
p2p_rx_p2p_action(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len,int rx_freq)1568 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1569 const u8 *data, size_t len, int rx_freq)
1570 {
1571 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1572 "P2P: RX P2P Public Action from " MACSTR, MAC2STR(sa));
1573 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1574
1575 if (len < 1)
1576 return;
1577
1578 switch (data[0]) {
1579 case P2P_GO_NEG_REQ:
1580 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1581 break;
1582 case P2P_GO_NEG_RESP:
1583 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1584 break;
1585 case P2P_GO_NEG_CONF:
1586 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1587 break;
1588 case P2P_INVITATION_REQ:
1589 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1590 rx_freq);
1591 break;
1592 case P2P_INVITATION_RESP:
1593 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1594 break;
1595 case P2P_PROV_DISC_REQ:
1596 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1597 break;
1598 case P2P_PROV_DISC_RESP:
1599 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1600 break;
1601 case P2P_DEV_DISC_REQ:
1602 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1603 break;
1604 case P2P_DEV_DISC_RESP:
1605 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1606 break;
1607 default:
1608 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1609 "P2P: Unsupported P2P Public Action frame type %d",
1610 data[0]);
1611 break;
1612 }
1613 }
1614
1615
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)1616 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1617 const u8 *sa, const u8 *bssid, const u8 *data,
1618 size_t len, int freq)
1619 {
1620 if (len < 1)
1621 return;
1622
1623 switch (data[0]) {
1624 case WLAN_PA_VENDOR_SPECIFIC:
1625 data++;
1626 len--;
1627 if (len < 3)
1628 return;
1629 if (WPA_GET_BE24(data) != OUI_WFA)
1630 return;
1631
1632 data += 3;
1633 len -= 3;
1634 if (len < 1)
1635 return;
1636
1637 if (*data != P2P_OUI_TYPE)
1638 return;
1639
1640 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq);
1641 break;
1642 case WLAN_PA_GAS_INITIAL_REQ:
1643 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1644 break;
1645 case WLAN_PA_GAS_INITIAL_RESP:
1646 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1647 break;
1648 case WLAN_PA_GAS_COMEBACK_REQ:
1649 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1650 break;
1651 case WLAN_PA_GAS_COMEBACK_RESP:
1652 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1653 break;
1654 }
1655 }
1656
1657
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)1658 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1659 const u8 *bssid, u8 category,
1660 const u8 *data, size_t len, int freq)
1661 {
1662 if (category == WLAN_ACTION_PUBLIC) {
1663 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1664 return;
1665 }
1666
1667 if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1668 return;
1669
1670 if (len < 4)
1671 return;
1672
1673 if (WPA_GET_BE24(data) != OUI_WFA)
1674 return;
1675 data += 3;
1676 len -= 3;
1677
1678 if (*data != P2P_OUI_TYPE)
1679 return;
1680 data++;
1681 len--;
1682
1683 /* P2P action frame */
1684 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1685 "P2P: RX P2P Action from " MACSTR, MAC2STR(sa));
1686 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1687
1688 if (len < 1)
1689 return;
1690 switch (data[0]) {
1691 case P2P_NOA:
1692 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1693 "P2P: Received P2P Action - Notice of Absence");
1694 /* TODO */
1695 break;
1696 case P2P_PRESENCE_REQ:
1697 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1698 break;
1699 case P2P_PRESENCE_RESP:
1700 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1701 break;
1702 case P2P_GO_DISC_REQ:
1703 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1704 break;
1705 default:
1706 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1707 "P2P: Received P2P Action - unknown type %u", data[0]);
1708 break;
1709 }
1710 }
1711
1712
p2p_go_neg_start(void * eloop_ctx,void * timeout_ctx)1713 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1714 {
1715 struct p2p_data *p2p = eloop_ctx;
1716 if (p2p->go_neg_peer == NULL)
1717 return;
1718 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1719 p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1720 p2p_connect_send(p2p, p2p->go_neg_peer);
1721 }
1722
1723
p2p_invite_start(void * eloop_ctx,void * timeout_ctx)1724 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1725 {
1726 struct p2p_data *p2p = eloop_ctx;
1727 if (p2p->invite_peer == NULL)
1728 return;
1729 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1730 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr);
1731 }
1732
1733
p2p_add_dev_from_probe_req(struct p2p_data * p2p,const u8 * addr,const u8 * ie,size_t ie_len)1734 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1735 const u8 *ie, size_t ie_len)
1736 {
1737 struct p2p_message msg;
1738 struct p2p_device *dev;
1739
1740 os_memset(&msg, 0, sizeof(msg));
1741 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1742 {
1743 p2p_parse_free(&msg);
1744 return; /* not a P2P probe */
1745 }
1746
1747 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1748 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1749 != 0) {
1750 /* The Probe Request is not part of P2P Device Discovery. It is
1751 * not known whether the source address of the frame is the P2P
1752 * Device Address or P2P Interface Address. Do not add a new
1753 * peer entry based on this frames.
1754 */
1755 p2p_parse_free(&msg);
1756 return;
1757 }
1758
1759 dev = p2p_get_device(p2p, addr);
1760 if (dev) {
1761 if (dev->country[0] == 0 && msg.listen_channel)
1762 os_memcpy(dev->country, msg.listen_channel, 3);
1763 os_get_time(&dev->last_seen);
1764 p2p_parse_free(&msg);
1765 return; /* already known */
1766 }
1767
1768 dev = p2p_create_device(p2p, addr);
1769 if (dev == NULL) {
1770 p2p_parse_free(&msg);
1771 return;
1772 }
1773
1774 os_get_time(&dev->last_seen);
1775 dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1776
1777 if (msg.listen_channel) {
1778 os_memcpy(dev->country, msg.listen_channel, 3);
1779 dev->listen_freq = p2p_channel_to_freq(dev->country,
1780 msg.listen_channel[3],
1781 msg.listen_channel[4]);
1782 }
1783
1784 p2p_copy_wps_info(dev, 1, &msg);
1785
1786 if (msg.wfd_subelems) {
1787 wpabuf_free(dev->info.wfd_subelems);
1788 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1789 }
1790
1791 p2p_parse_free(&msg);
1792
1793 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1794 "P2P: Created device entry based on Probe Req: " MACSTR
1795 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1796 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1797 dev->info.group_capab, dev->info.device_name,
1798 dev->listen_freq);
1799 }
1800
1801
p2p_add_dev_from_go_neg_req(struct p2p_data * p2p,const u8 * addr,struct p2p_message * msg)1802 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1803 const u8 *addr,
1804 struct p2p_message *msg)
1805 {
1806 struct p2p_device *dev;
1807
1808 dev = p2p_get_device(p2p, addr);
1809 if (dev) {
1810 os_get_time(&dev->last_seen);
1811 return dev; /* already known */
1812 }
1813
1814 dev = p2p_create_device(p2p, addr);
1815 if (dev == NULL)
1816 return NULL;
1817
1818 p2p_add_dev_info(p2p, addr, dev, msg);
1819
1820 return dev;
1821 }
1822
1823
dev_type_match(const u8 * dev_type,const u8 * req_dev_type)1824 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1825 {
1826 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1827 return 1;
1828 if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1829 WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1830 WPA_GET_BE16(&req_dev_type[6]) == 0)
1831 return 1; /* Category match with wildcard OUI/sub-category */
1832 return 0;
1833 }
1834
1835
dev_type_list_match(const u8 * dev_type,const u8 * req_dev_type[],size_t num_req_dev_type)1836 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1837 size_t num_req_dev_type)
1838 {
1839 size_t i;
1840 for (i = 0; i < num_req_dev_type; i++) {
1841 if (dev_type_match(dev_type, req_dev_type[i]))
1842 return 1;
1843 }
1844 return 0;
1845 }
1846
1847
1848 /**
1849 * p2p_match_dev_type - Match local device type with requested type
1850 * @p2p: P2P module context from p2p_init()
1851 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1852 * Returns: 1 on match, 0 on mismatch
1853 *
1854 * This function can be used to match the Requested Device Type attribute in
1855 * WPS IE with the local device types for deciding whether to reply to a Probe
1856 * Request frame.
1857 */
p2p_match_dev_type(struct p2p_data * p2p,struct wpabuf * wps)1858 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
1859 {
1860 struct wps_parse_attr attr;
1861 size_t i;
1862
1863 if (wps_parse_msg(wps, &attr))
1864 return 1; /* assume no Requested Device Type attributes */
1865
1866 if (attr.num_req_dev_type == 0)
1867 return 1; /* no Requested Device Type attributes -> match */
1868
1869 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
1870 attr.num_req_dev_type))
1871 return 1; /* Own Primary Device Type matches */
1872
1873 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
1874 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
1875 attr.req_dev_type,
1876 attr.num_req_dev_type))
1877 return 1; /* Own Secondary Device Type matches */
1878
1879 /* No matching device type found */
1880 return 0;
1881 }
1882
1883
p2p_build_probe_resp_ies(struct p2p_data * p2p)1884 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
1885 {
1886 struct wpabuf *buf;
1887 u8 *len;
1888 int pw_id = -1;
1889 size_t extra = 0;
1890
1891 #ifdef CONFIG_WIFI_DISPLAY
1892 if (p2p->wfd_ie_probe_resp)
1893 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
1894 #endif /* CONFIG_WIFI_DISPLAY */
1895
1896 buf = wpabuf_alloc(1000 + extra);
1897 if (buf == NULL)
1898 return NULL;
1899
1900 if (p2p->go_neg_peer) {
1901 /* Advertise immediate availability of WPS credential */
1902 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
1903 }
1904
1905 p2p_build_wps_ie(p2p, buf, pw_id, 1);
1906
1907 #ifdef CONFIG_WIFI_DISPLAY
1908 if (p2p->wfd_ie_probe_resp)
1909 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
1910 #endif /* CONFIG_WIFI_DISPLAY */
1911
1912 /* P2P IE */
1913 len = p2p_buf_add_ie_hdr(buf);
1914 p2p_buf_add_capability(buf, p2p->dev_capab &
1915 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
1916 if (p2p->ext_listen_interval)
1917 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
1918 p2p->ext_listen_interval);
1919 p2p_buf_add_device_info(buf, p2p, NULL);
1920 p2p_buf_update_ie_hdr(buf, len);
1921
1922 return buf;
1923 }
1924
1925
is_11b(u8 rate)1926 static int is_11b(u8 rate)
1927 {
1928 return rate == 0x02 || rate == 0x04 || rate == 0x0b || rate == 0x16;
1929 }
1930
1931
supp_rates_11b_only(struct ieee802_11_elems * elems)1932 static int supp_rates_11b_only(struct ieee802_11_elems *elems)
1933 {
1934 int num_11b = 0, num_others = 0;
1935 int i;
1936
1937 if (elems->supp_rates == NULL && elems->ext_supp_rates == NULL)
1938 return 0;
1939
1940 for (i = 0; elems->supp_rates && i < elems->supp_rates_len; i++) {
1941 if (is_11b(elems->supp_rates[i]))
1942 num_11b++;
1943 else
1944 num_others++;
1945 }
1946
1947 for (i = 0; elems->ext_supp_rates && i < elems->ext_supp_rates_len;
1948 i++) {
1949 if (is_11b(elems->ext_supp_rates[i]))
1950 num_11b++;
1951 else
1952 num_others++;
1953 }
1954
1955 return num_11b > 0 && num_others == 0;
1956 }
1957
1958
1959 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)1960 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
1961 const u8 *bssid, const u8 *ie, size_t ie_len)
1962 {
1963 struct ieee802_11_elems elems;
1964 struct wpabuf *buf;
1965 struct ieee80211_mgmt *resp;
1966 struct p2p_message msg;
1967 struct wpabuf *ies;
1968
1969 if (!p2p->in_listen || !p2p->drv_in_listen) {
1970 /* not in Listen state - ignore Probe Request */
1971 return P2P_PREQ_NOT_LISTEN;
1972 }
1973
1974 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
1975 ParseFailed) {
1976 /* Ignore invalid Probe Request frames */
1977 return P2P_PREQ_MALFORMED;
1978 }
1979
1980 if (elems.p2p == NULL) {
1981 /* not a P2P probe - ignore it */
1982 return P2P_PREQ_NOT_P2P;
1983 }
1984
1985 if (dst && !is_broadcast_ether_addr(dst) &&
1986 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
1987 /* Not sent to the broadcast address or our P2P Device Address
1988 */
1989 return P2P_PREQ_NOT_PROCESSED;
1990 }
1991
1992 if (bssid && !is_broadcast_ether_addr(bssid)) {
1993 /* Not sent to the Wildcard BSSID */
1994 return P2P_PREQ_NOT_PROCESSED;
1995 }
1996
1997 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
1998 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
1999 0) {
2000 /* not using P2P Wildcard SSID - ignore */
2001 return P2P_PREQ_NOT_PROCESSED;
2002 }
2003
2004 if (supp_rates_11b_only(&elems)) {
2005 /* Indicates support for 11b rates only */
2006 return P2P_PREQ_NOT_P2P;
2007 }
2008
2009 os_memset(&msg, 0, sizeof(msg));
2010 if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2011 /* Could not parse P2P attributes */
2012 return P2P_PREQ_NOT_P2P;
2013 }
2014
2015 if (msg.device_id &&
2016 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2017 /* Device ID did not match */
2018 p2p_parse_free(&msg);
2019 return P2P_PREQ_NOT_PROCESSED;
2020 }
2021
2022 /* Check Requested Device Type match */
2023 if (msg.wps_attributes &&
2024 !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2025 /* No match with Requested Device Type */
2026 p2p_parse_free(&msg);
2027 return P2P_PREQ_NOT_PROCESSED;
2028 }
2029 p2p_parse_free(&msg);
2030
2031 if (!p2p->cfg->send_probe_resp) {
2032 /* Response generated elsewhere */
2033 return P2P_PREQ_NOT_PROCESSED;
2034 }
2035
2036 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2037 "P2P: Reply to P2P Probe Request in Listen state");
2038
2039 /*
2040 * We do not really have a specific BSS that this frame is advertising,
2041 * so build a frame that has some information in valid format. This is
2042 * really only used for discovery purposes, not to learn exact BSS
2043 * parameters.
2044 */
2045 ies = p2p_build_probe_resp_ies(p2p);
2046 if (ies == NULL)
2047 return P2P_PREQ_NOT_PROCESSED;
2048
2049 buf = wpabuf_alloc(200 + wpabuf_len(ies));
2050 if (buf == NULL) {
2051 wpabuf_free(ies);
2052 return P2P_PREQ_NOT_PROCESSED;
2053 }
2054
2055 resp = NULL;
2056 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2057
2058 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2059 (WLAN_FC_STYPE_PROBE_RESP << 4));
2060 os_memcpy(resp->da, addr, ETH_ALEN);
2061 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2062 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2063 resp->u.probe_resp.beacon_int = host_to_le16(100);
2064 /* hardware or low-level driver will setup seq_ctrl and timestamp */
2065 resp->u.probe_resp.capab_info =
2066 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2067 WLAN_CAPABILITY_PRIVACY |
2068 WLAN_CAPABILITY_SHORT_SLOT_TIME);
2069
2070 wpabuf_put_u8(buf, WLAN_EID_SSID);
2071 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2072 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2073
2074 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2075 wpabuf_put_u8(buf, 8);
2076 wpabuf_put_u8(buf, (60 / 5) | 0x80);
2077 wpabuf_put_u8(buf, 90 / 5);
2078 wpabuf_put_u8(buf, (120 / 5) | 0x80);
2079 wpabuf_put_u8(buf, 180 / 5);
2080 wpabuf_put_u8(buf, (240 / 5) | 0x80);
2081 wpabuf_put_u8(buf, 360 / 5);
2082 wpabuf_put_u8(buf, 480 / 5);
2083 wpabuf_put_u8(buf, 540 / 5);
2084
2085 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2086 wpabuf_put_u8(buf, 1);
2087 wpabuf_put_u8(buf, p2p->cfg->channel);
2088
2089 wpabuf_put_buf(buf, ies);
2090 wpabuf_free(ies);
2091
2092 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2093
2094 wpabuf_free(buf);
2095
2096 return P2P_PREQ_NOT_PROCESSED;
2097 }
2098
2099
2100 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)2101 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2102 const u8 *bssid, const u8 *ie, size_t ie_len)
2103 {
2104 enum p2p_probe_req_status res;
2105
2106 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2107
2108 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2109
2110 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2111 p2p->go_neg_peer &&
2112 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2113 == 0) {
2114 /* Received a Probe Request from GO Negotiation peer */
2115 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2116 "P2P: Found GO Negotiation peer - try to start GO "
2117 "negotiation from timeout");
2118 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2119 return P2P_PREQ_PROCESSED;
2120 }
2121
2122 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2123 p2p->invite_peer &&
2124 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2125 == 0) {
2126 /* Received a Probe Request from Invite peer */
2127 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2128 "P2P: Found Invite peer - try to start Invite from "
2129 "timeout");
2130 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2131 return P2P_PREQ_PROCESSED;
2132 }
2133
2134 return res;
2135 }
2136
2137
p2p_assoc_req_ie_wlan_ap(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,struct wpabuf * p2p_ie)2138 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2139 u8 *buf, size_t len, struct wpabuf *p2p_ie)
2140 {
2141 struct wpabuf *tmp;
2142 u8 *lpos;
2143 size_t tmplen;
2144 int res;
2145 u8 group_capab;
2146
2147 if (p2p_ie == NULL)
2148 return 0; /* WLAN AP is not a P2P manager */
2149
2150 /*
2151 * (Re)Association Request - P2P IE
2152 * P2P Capability attribute (shall be present)
2153 * P2P Interface attribute (present if concurrent device and
2154 * P2P Management is enabled)
2155 */
2156 tmp = wpabuf_alloc(200);
2157 if (tmp == NULL)
2158 return -1;
2159
2160 lpos = p2p_buf_add_ie_hdr(tmp);
2161 group_capab = 0;
2162 if (p2p->num_groups > 0) {
2163 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2164 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2165 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2166 p2p->cross_connect)
2167 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2168 }
2169 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2170 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2171 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2172 p2p_buf_add_p2p_interface(tmp, p2p);
2173 p2p_buf_update_ie_hdr(tmp, lpos);
2174
2175 tmplen = wpabuf_len(tmp);
2176 if (tmplen > len)
2177 res = -1;
2178 else {
2179 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2180 res = tmplen;
2181 }
2182 wpabuf_free(tmp);
2183
2184 return res;
2185 }
2186
2187
p2p_assoc_req_ie(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,int p2p_group,struct wpabuf * p2p_ie)2188 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2189 size_t len, int p2p_group, struct wpabuf *p2p_ie)
2190 {
2191 struct wpabuf *tmp;
2192 u8 *lpos;
2193 struct p2p_device *peer;
2194 size_t tmplen;
2195 int res;
2196 size_t extra = 0;
2197
2198 if (!p2p_group)
2199 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2200
2201 #ifdef CONFIG_WIFI_DISPLAY
2202 if (p2p->wfd_ie_assoc_req)
2203 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2204 #endif /* CONFIG_WIFI_DISPLAY */
2205
2206 /*
2207 * (Re)Association Request - P2P IE
2208 * P2P Capability attribute (shall be present)
2209 * Extended Listen Timing (may be present)
2210 * P2P Device Info attribute (shall be present)
2211 */
2212 tmp = wpabuf_alloc(200 + extra);
2213 if (tmp == NULL)
2214 return -1;
2215
2216 #ifdef CONFIG_WIFI_DISPLAY
2217 if (p2p->wfd_ie_assoc_req)
2218 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2219 #endif /* CONFIG_WIFI_DISPLAY */
2220
2221 peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2222
2223 lpos = p2p_buf_add_ie_hdr(tmp);
2224 p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2225 if (p2p->ext_listen_interval)
2226 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2227 p2p->ext_listen_interval);
2228 p2p_buf_add_device_info(tmp, p2p, peer);
2229 p2p_buf_update_ie_hdr(tmp, lpos);
2230
2231 tmplen = wpabuf_len(tmp);
2232 if (tmplen > len)
2233 res = -1;
2234 else {
2235 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2236 res = tmplen;
2237 }
2238 wpabuf_free(tmp);
2239
2240 return res;
2241 }
2242
2243
p2p_scan_result_text(const u8 * ies,size_t ies_len,char * buf,char * end)2244 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2245 {
2246 struct wpabuf *p2p_ie;
2247 int ret;
2248
2249 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2250 if (p2p_ie == NULL)
2251 return 0;
2252
2253 ret = p2p_attr_text(p2p_ie, buf, end);
2254 wpabuf_free(p2p_ie);
2255 return ret;
2256 }
2257
2258
p2p_parse_dev_addr_in_p2p_ie(struct wpabuf * p2p_ie,u8 * dev_addr)2259 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2260 {
2261 struct p2p_message msg;
2262
2263 os_memset(&msg, 0, sizeof(msg));
2264 if (p2p_parse_p2p_ie(p2p_ie, &msg))
2265 return -1;
2266
2267 if (msg.p2p_device_addr) {
2268 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2269 return 0;
2270 } else if (msg.device_id) {
2271 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2272 return 0;
2273 }
2274 return -1;
2275 }
2276
2277
p2p_parse_dev_addr(const u8 * ies,size_t ies_len,u8 * dev_addr)2278 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2279 {
2280 struct wpabuf *p2p_ie;
2281 int ret;
2282
2283 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2284 P2P_IE_VENDOR_TYPE);
2285 if (p2p_ie == NULL)
2286 return -1;
2287 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2288 wpabuf_free(p2p_ie);
2289 return ret;
2290 }
2291
2292
p2p_clear_go_neg(struct p2p_data * p2p)2293 static void p2p_clear_go_neg(struct p2p_data *p2p)
2294 {
2295 p2p->go_neg_peer = NULL;
2296 p2p_clear_timeout(p2p);
2297 p2p_set_state(p2p, P2P_IDLE);
2298 }
2299
2300
p2p_wps_success_cb(struct p2p_data * p2p,const u8 * mac_addr)2301 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2302 {
2303 if (p2p->go_neg_peer == NULL) {
2304 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2305 "P2P: No pending Group Formation - "
2306 "ignore WPS registration success notification");
2307 return; /* No pending Group Formation */
2308 }
2309
2310 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2311 0) {
2312 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2313 "P2P: Ignore WPS registration success notification "
2314 "for " MACSTR " (GO Negotiation peer " MACSTR ")",
2315 MAC2STR(mac_addr),
2316 MAC2STR(p2p->go_neg_peer->intended_addr));
2317 return; /* Ignore unexpected peer address */
2318 }
2319
2320 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2321 "P2P: Group Formation completed successfully with " MACSTR,
2322 MAC2STR(mac_addr));
2323
2324 p2p_clear_go_neg(p2p);
2325 }
2326
2327
p2p_group_formation_failed(struct p2p_data * p2p)2328 void p2p_group_formation_failed(struct p2p_data *p2p)
2329 {
2330 if (p2p->go_neg_peer == NULL) {
2331 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2332 "P2P: No pending Group Formation - "
2333 "ignore group formation failure notification");
2334 return; /* No pending Group Formation */
2335 }
2336
2337 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2338 "P2P: Group Formation failed with " MACSTR,
2339 MAC2STR(p2p->go_neg_peer->intended_addr));
2340
2341 p2p_clear_go_neg(p2p);
2342 }
2343
2344
p2p_init(const struct p2p_config * cfg)2345 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2346 {
2347 struct p2p_data *p2p;
2348
2349 if (cfg->max_peers < 1)
2350 return NULL;
2351
2352 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2353 if (p2p == NULL)
2354 return NULL;
2355 p2p->cfg = (struct p2p_config *) (p2p + 1);
2356 os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2357 if (cfg->dev_name)
2358 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2359 if (cfg->manufacturer)
2360 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2361 if (cfg->model_name)
2362 p2p->cfg->model_name = os_strdup(cfg->model_name);
2363 if (cfg->model_number)
2364 p2p->cfg->model_number = os_strdup(cfg->model_number);
2365 if (cfg->serial_number)
2366 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2367 if (cfg->pref_chan) {
2368 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2369 sizeof(struct p2p_channel));
2370 if (p2p->cfg->pref_chan) {
2371 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2372 cfg->num_pref_chan *
2373 sizeof(struct p2p_channel));
2374 } else
2375 p2p->cfg->num_pref_chan = 0;
2376 }
2377
2378 p2p->min_disc_int = 1;
2379 p2p->max_disc_int = 3;
2380 p2p->max_disc_tu = -1;
2381
2382 os_get_random(&p2p->next_tie_breaker, 1);
2383 p2p->next_tie_breaker &= 0x01;
2384 if (cfg->sd_request)
2385 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2386 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2387 if (cfg->concurrent_operations)
2388 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2389 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2390
2391 dl_list_init(&p2p->devices);
2392
2393 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2394 p2p_expiration_timeout, p2p, NULL);
2395
2396 p2p->go_timeout = 100;
2397 p2p->client_timeout = 20;
2398
2399 return p2p;
2400 }
2401
2402
p2p_deinit(struct p2p_data * p2p)2403 void p2p_deinit(struct p2p_data *p2p)
2404 {
2405 #ifdef CONFIG_WIFI_DISPLAY
2406 wpabuf_free(p2p->wfd_ie_beacon);
2407 wpabuf_free(p2p->wfd_ie_probe_req);
2408 wpabuf_free(p2p->wfd_ie_probe_resp);
2409 wpabuf_free(p2p->wfd_ie_assoc_req);
2410 wpabuf_free(p2p->wfd_ie_invitation);
2411 wpabuf_free(p2p->wfd_ie_prov_disc_req);
2412 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2413 wpabuf_free(p2p->wfd_ie_go_neg);
2414 wpabuf_free(p2p->wfd_dev_info);
2415 wpabuf_free(p2p->wfd_assoc_bssid);
2416 wpabuf_free(p2p->wfd_coupled_sink_info);
2417 #endif /* CONFIG_WIFI_DISPLAY */
2418
2419 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2420 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2421 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2422 p2p_flush(p2p);
2423 p2p_free_req_dev_types(p2p);
2424 os_free(p2p->cfg->dev_name);
2425 os_free(p2p->cfg->manufacturer);
2426 os_free(p2p->cfg->model_name);
2427 os_free(p2p->cfg->model_number);
2428 os_free(p2p->cfg->serial_number);
2429 os_free(p2p->cfg->pref_chan);
2430 os_free(p2p->groups);
2431 wpabuf_free(p2p->sd_resp);
2432 os_free(p2p->after_scan_tx);
2433 p2p_remove_wps_vendor_extensions(p2p);
2434 os_free(p2p);
2435 }
2436
2437
p2p_flush(struct p2p_data * p2p)2438 void p2p_flush(struct p2p_data *p2p)
2439 {
2440 struct p2p_device *dev, *prev;
2441 p2p_stop_find(p2p);
2442 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2443 list) {
2444 dl_list_del(&dev->list);
2445 p2p_device_free(p2p, dev);
2446 }
2447 p2p_free_sd_queries(p2p);
2448 os_free(p2p->after_scan_tx);
2449 p2p->after_scan_tx = NULL;
2450 }
2451
2452
p2p_unauthorize(struct p2p_data * p2p,const u8 * addr)2453 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2454 {
2455 struct p2p_device *dev;
2456
2457 dev = p2p_get_device(p2p, addr);
2458 if (dev == NULL)
2459 return -1;
2460
2461 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Unauthorizing " MACSTR,
2462 MAC2STR(addr));
2463
2464 if (p2p->go_neg_peer == dev)
2465 p2p->go_neg_peer = NULL;
2466
2467 dev->wps_method = WPS_NOT_READY;
2468 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2469 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2470
2471 /* Check if after_scan_tx is for this peer. If so free it */
2472 if (p2p->after_scan_tx &&
2473 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2474 os_free(p2p->after_scan_tx);
2475 p2p->after_scan_tx = NULL;
2476 }
2477
2478 return 0;
2479 }
2480
2481
p2p_set_dev_name(struct p2p_data * p2p,const char * dev_name)2482 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2483 {
2484 os_free(p2p->cfg->dev_name);
2485 if (dev_name) {
2486 p2p->cfg->dev_name = os_strdup(dev_name);
2487 if (p2p->cfg->dev_name == NULL)
2488 return -1;
2489 } else
2490 p2p->cfg->dev_name = NULL;
2491 return 0;
2492 }
2493
2494
p2p_set_manufacturer(struct p2p_data * p2p,const char * manufacturer)2495 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2496 {
2497 os_free(p2p->cfg->manufacturer);
2498 p2p->cfg->manufacturer = NULL;
2499 if (manufacturer) {
2500 p2p->cfg->manufacturer = os_strdup(manufacturer);
2501 if (p2p->cfg->manufacturer == NULL)
2502 return -1;
2503 }
2504
2505 return 0;
2506 }
2507
2508
p2p_set_model_name(struct p2p_data * p2p,const char * model_name)2509 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2510 {
2511 os_free(p2p->cfg->model_name);
2512 p2p->cfg->model_name = NULL;
2513 if (model_name) {
2514 p2p->cfg->model_name = os_strdup(model_name);
2515 if (p2p->cfg->model_name == NULL)
2516 return -1;
2517 }
2518
2519 return 0;
2520 }
2521
2522
p2p_set_model_number(struct p2p_data * p2p,const char * model_number)2523 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2524 {
2525 os_free(p2p->cfg->model_number);
2526 p2p->cfg->model_number = NULL;
2527 if (model_number) {
2528 p2p->cfg->model_number = os_strdup(model_number);
2529 if (p2p->cfg->model_number == NULL)
2530 return -1;
2531 }
2532
2533 return 0;
2534 }
2535
2536
p2p_set_serial_number(struct p2p_data * p2p,const char * serial_number)2537 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2538 {
2539 os_free(p2p->cfg->serial_number);
2540 p2p->cfg->serial_number = NULL;
2541 if (serial_number) {
2542 p2p->cfg->serial_number = os_strdup(serial_number);
2543 if (p2p->cfg->serial_number == NULL)
2544 return -1;
2545 }
2546
2547 return 0;
2548 }
2549
2550
p2p_set_config_methods(struct p2p_data * p2p,u16 config_methods)2551 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2552 {
2553 p2p->cfg->config_methods = config_methods;
2554 }
2555
2556
p2p_set_uuid(struct p2p_data * p2p,const u8 * uuid)2557 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2558 {
2559 os_memcpy(p2p->cfg->uuid, uuid, 16);
2560 }
2561
2562
p2p_set_pri_dev_type(struct p2p_data * p2p,const u8 * pri_dev_type)2563 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2564 {
2565 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2566 return 0;
2567 }
2568
2569
p2p_set_sec_dev_types(struct p2p_data * p2p,const u8 dev_types[][8],size_t num_dev_types)2570 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2571 size_t num_dev_types)
2572 {
2573 if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2574 num_dev_types = P2P_SEC_DEVICE_TYPES;
2575 p2p->cfg->num_sec_dev_types = num_dev_types;
2576 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2577 return 0;
2578 }
2579
2580
p2p_remove_wps_vendor_extensions(struct p2p_data * p2p)2581 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2582 {
2583 int i;
2584
2585 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2586 wpabuf_free(p2p->wps_vendor_ext[i]);
2587 p2p->wps_vendor_ext[i] = NULL;
2588 }
2589 }
2590
2591
p2p_add_wps_vendor_extension(struct p2p_data * p2p,const struct wpabuf * vendor_ext)2592 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2593 const struct wpabuf *vendor_ext)
2594 {
2595 int i;
2596
2597 if (vendor_ext == NULL)
2598 return -1;
2599
2600 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2601 if (p2p->wps_vendor_ext[i] == NULL)
2602 break;
2603 }
2604 if (i >= P2P_MAX_WPS_VENDOR_EXT)
2605 return -1;
2606
2607 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2608 if (p2p->wps_vendor_ext[i] == NULL)
2609 return -1;
2610
2611 return 0;
2612 }
2613
2614
p2p_set_country(struct p2p_data * p2p,const char * country)2615 int p2p_set_country(struct p2p_data *p2p, const char *country)
2616 {
2617 os_memcpy(p2p->cfg->country, country, 3);
2618 return 0;
2619 }
2620
2621
p2p_continue_find(struct p2p_data * p2p)2622 void p2p_continue_find(struct p2p_data *p2p)
2623 {
2624 struct p2p_device *dev;
2625 p2p_set_state(p2p, P2P_SEARCH);
2626 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2627 if (dev->flags & P2P_DEV_SD_SCHEDULE) {
2628 if (p2p_start_sd(p2p, dev) == 0)
2629 return;
2630 else
2631 break;
2632 } else if (dev->req_config_methods &&
2633 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2634 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send "
2635 "pending Provision Discovery Request to "
2636 MACSTR " (config methods 0x%x)",
2637 MAC2STR(dev->info.p2p_device_addr),
2638 dev->req_config_methods);
2639 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2640 return;
2641 }
2642 }
2643
2644 p2p_listen_in_find(p2p, 1);
2645 }
2646
2647
p2p_sd_cb(struct p2p_data * p2p,int success)2648 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2649 {
2650 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2651 "P2P: Service Discovery Query TX callback: success=%d",
2652 success);
2653 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2654
2655 if (!success) {
2656 if (p2p->sd_peer) {
2657 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
2658 p2p->sd_peer = NULL;
2659 }
2660 p2p_continue_find(p2p);
2661 return;
2662 }
2663
2664 if (p2p->sd_peer == NULL) {
2665 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2666 "P2P: No SD peer entry known");
2667 p2p_continue_find(p2p);
2668 return;
2669 }
2670
2671 /* Wait for response from the peer */
2672 p2p_set_state(p2p, P2P_SD_DURING_FIND);
2673 p2p_set_timeout(p2p, 0, 200000);
2674 }
2675
2676
2677 /**
2678 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2679 * @p2p: P2P module context from p2p_init()
2680 */
p2p_retry_pd(struct p2p_data * p2p)2681 static void p2p_retry_pd(struct p2p_data *p2p)
2682 {
2683 struct p2p_device *dev;
2684
2685 if (p2p->state != P2P_IDLE)
2686 return;
2687
2688 /*
2689 * Retry the prov disc req attempt only for the peer that the user had
2690 * requested.
2691 */
2692
2693 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2694 if (os_memcmp(p2p->pending_pd_devaddr,
2695 dev->info.p2p_device_addr, ETH_ALEN) != 0)
2696 continue;
2697 if (!dev->req_config_methods)
2698 continue;
2699
2700 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send "
2701 "pending Provision Discovery Request to "
2702 MACSTR " (config methods 0x%x)",
2703 MAC2STR(dev->info.p2p_device_addr),
2704 dev->req_config_methods);
2705 p2p_send_prov_disc_req(p2p, dev,
2706 dev->flags & P2P_DEV_PD_FOR_JOIN, 0);
2707 return;
2708 }
2709 }
2710
2711
p2p_prov_disc_cb(struct p2p_data * p2p,int success)2712 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2713 {
2714 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2715 "P2P: Provision Discovery Request TX callback: success=%d",
2716 success);
2717
2718 /*
2719 * Postpone resetting the pending action state till after we actually
2720 * time out. This allows us to take some action like notifying any
2721 * interested parties about no response to the request.
2722 *
2723 * When the timer (below) goes off we check in IDLE, SEARCH, or
2724 * LISTEN_ONLY state, which are the only allowed states to issue a PD
2725 * requests in, if this was still pending and then raise notification.
2726 */
2727
2728 if (!success) {
2729 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2730
2731 if (p2p->user_initiated_pd &&
2732 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2733 {
2734 /* Retry request from timeout to avoid busy loops */
2735 p2p->pending_action_state = P2P_PENDING_PD;
2736 p2p_set_timeout(p2p, 0, 50000);
2737 } else if (p2p->state != P2P_IDLE)
2738 p2p_continue_find(p2p);
2739 else if (p2p->user_initiated_pd) {
2740 p2p->pending_action_state = P2P_PENDING_PD;
2741 p2p_set_timeout(p2p, 0, 300000);
2742 }
2743 return;
2744 }
2745
2746 /*
2747 * This postponing, of resetting pending_action_state, needs to be
2748 * done only for user initiated PD requests and not internal ones.
2749 */
2750 if (p2p->user_initiated_pd)
2751 p2p->pending_action_state = P2P_PENDING_PD;
2752 else
2753 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2754
2755 /* Wait for response from the peer */
2756 if (p2p->state == P2P_SEARCH)
2757 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2758 p2p_set_timeout(p2p, 0, 200000);
2759 }
2760
2761
p2p_scan_res_handler(struct p2p_data * p2p,const u8 * bssid,int freq,unsigned int age,int level,const u8 * ies,size_t ies_len)2762 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2763 unsigned int age, int level, const u8 *ies,
2764 size_t ies_len)
2765 {
2766 p2p_add_device(p2p, bssid, freq, age, level, ies, ies_len, 1);
2767
2768 return 0;
2769 }
2770
2771
p2p_scan_res_handled(struct p2p_data * p2p)2772 void p2p_scan_res_handled(struct p2p_data *p2p)
2773 {
2774 if (!p2p->p2p_scan_running) {
2775 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan was not "
2776 "running, but scan results received");
2777 }
2778 p2p->p2p_scan_running = 0;
2779 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2780
2781 if (p2p_run_after_scan(p2p))
2782 return;
2783 if (p2p->state == P2P_SEARCH)
2784 p2p_continue_find(p2p);
2785 }
2786
2787
p2p_scan_ie(struct p2p_data * p2p,struct wpabuf * ies,const u8 * dev_id)2788 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2789 {
2790 u8 *len;
2791
2792 #ifdef CONFIG_WIFI_DISPLAY
2793 if (p2p->wfd_ie_probe_req)
2794 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
2795 #endif /* CONFIG_WIFI_DISPLAY */
2796
2797 len = p2p_buf_add_ie_hdr(ies);
2798 p2p_buf_add_capability(ies, p2p->dev_capab &
2799 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2800 if (dev_id)
2801 p2p_buf_add_device_id(ies, dev_id);
2802 if (p2p->cfg->reg_class && p2p->cfg->channel)
2803 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
2804 p2p->cfg->reg_class,
2805 p2p->cfg->channel);
2806 if (p2p->ext_listen_interval)
2807 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
2808 p2p->ext_listen_interval);
2809 /* TODO: p2p_buf_add_operating_channel() if GO */
2810 p2p_buf_update_ie_hdr(ies, len);
2811 }
2812
2813
p2p_scan_ie_buf_len(struct p2p_data * p2p)2814 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
2815 {
2816 size_t len = 100;
2817
2818 #ifdef CONFIG_WIFI_DISPLAY
2819 if (p2p && p2p->wfd_ie_probe_req)
2820 len += wpabuf_len(p2p->wfd_ie_probe_req);
2821 #endif /* CONFIG_WIFI_DISPLAY */
2822
2823 return len;
2824 }
2825
2826
p2p_ie_text(struct wpabuf * p2p_ie,char * buf,char * end)2827 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
2828 {
2829 return p2p_attr_text(p2p_ie, buf, end);
2830 }
2831
2832
p2p_go_neg_req_cb(struct p2p_data * p2p,int success)2833 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
2834 {
2835 struct p2p_device *dev = p2p->go_neg_peer;
2836
2837 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2838 "P2P: GO Negotiation Request TX callback: success=%d",
2839 success);
2840
2841 if (dev == NULL) {
2842 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2843 "P2P: No pending GO Negotiation");
2844 return;
2845 }
2846
2847 if (success) {
2848 if (dev->flags & P2P_DEV_USER_REJECTED) {
2849 p2p_set_state(p2p, P2P_IDLE);
2850 return;
2851 }
2852 } else if (dev->go_neg_req_sent) {
2853 /* Cancel the increment from p2p_connect_send() on failure */
2854 dev->go_neg_req_sent--;
2855 }
2856
2857 if (!success &&
2858 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
2859 !is_zero_ether_addr(dev->member_in_go_dev)) {
2860 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2861 "P2P: Peer " MACSTR " did not acknowledge request - "
2862 "try to use device discoverability through its GO",
2863 MAC2STR(dev->info.p2p_device_addr));
2864 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2865 p2p_send_dev_disc_req(p2p, dev);
2866 return;
2867 }
2868
2869 /*
2870 * Use P2P find, if needed, to find the other device from its listen
2871 * channel.
2872 */
2873 p2p_set_state(p2p, P2P_CONNECT);
2874 p2p_set_timeout(p2p, 0, success ? 200000 : 100000);
2875 }
2876
2877
p2p_go_neg_resp_cb(struct p2p_data * p2p,int success)2878 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
2879 {
2880 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2881 "P2P: GO Negotiation Response TX callback: success=%d",
2882 success);
2883 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
2884 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2885 "P2P: Ignore TX callback event - GO Negotiation is "
2886 "not running anymore");
2887 return;
2888 }
2889 p2p_set_state(p2p, P2P_CONNECT);
2890 p2p_set_timeout(p2p, 0, 250000);
2891 }
2892
2893
p2p_go_neg_resp_failure_cb(struct p2p_data * p2p,int success)2894 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success)
2895 {
2896 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2897 "P2P: GO Negotiation Response (failure) TX callback: "
2898 "success=%d", success);
2899 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
2900 p2p_go_neg_failed(p2p, p2p->go_neg_peer,
2901 p2p->go_neg_peer->status);
2902 }
2903 }
2904
2905
p2p_go_neg_conf_cb(struct p2p_data * p2p,enum p2p_send_action_result result)2906 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
2907 enum p2p_send_action_result result)
2908 {
2909 struct p2p_device *dev;
2910
2911 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2912 "P2P: GO Negotiation Confirm TX callback: result=%d",
2913 result);
2914 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2915 if (result == P2P_SEND_ACTION_FAILED) {
2916 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
2917 return;
2918 }
2919 if (result == P2P_SEND_ACTION_NO_ACK) {
2920 /*
2921 * It looks like the TX status for GO Negotiation Confirm is
2922 * often showing failure even when the peer has actually
2923 * received the frame. Since the peer may change channels
2924 * immediately after having received the frame, we may not see
2925 * an Ack for retries, so just dropping a single frame may
2926 * trigger this. To allow the group formation to succeed if the
2927 * peer did indeed receive the frame, continue regardless of
2928 * the TX status.
2929 */
2930 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2931 "P2P: Assume GO Negotiation Confirm TX was actually "
2932 "received by the peer even though Ack was not "
2933 "reported");
2934 }
2935
2936 dev = p2p->go_neg_peer;
2937 if (dev == NULL)
2938 return;
2939
2940 p2p_go_complete(p2p, dev);
2941 }
2942
2943
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)2944 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
2945 const u8 *src, const u8 *bssid,
2946 enum p2p_send_action_result result)
2947 {
2948 enum p2p_pending_action_state state;
2949 int success;
2950
2951 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2952 "P2P: Action frame TX callback (state=%d freq=%u dst=" MACSTR
2953 " src=" MACSTR " bssid=" MACSTR " result=%d",
2954 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
2955 MAC2STR(bssid), result);
2956 success = result == P2P_SEND_ACTION_SUCCESS;
2957 state = p2p->pending_action_state;
2958 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2959 switch (state) {
2960 case P2P_NO_PENDING_ACTION:
2961 break;
2962 case P2P_PENDING_GO_NEG_REQUEST:
2963 p2p_go_neg_req_cb(p2p, success);
2964 break;
2965 case P2P_PENDING_GO_NEG_RESPONSE:
2966 p2p_go_neg_resp_cb(p2p, success);
2967 break;
2968 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
2969 p2p_go_neg_resp_failure_cb(p2p, success);
2970 break;
2971 case P2P_PENDING_GO_NEG_CONFIRM:
2972 p2p_go_neg_conf_cb(p2p, result);
2973 break;
2974 case P2P_PENDING_SD:
2975 p2p_sd_cb(p2p, success);
2976 break;
2977 case P2P_PENDING_PD:
2978 p2p_prov_disc_cb(p2p, success);
2979 break;
2980 case P2P_PENDING_INVITATION_REQUEST:
2981 p2p_invitation_req_cb(p2p, success);
2982 break;
2983 case P2P_PENDING_INVITATION_RESPONSE:
2984 p2p_invitation_resp_cb(p2p, success);
2985 break;
2986 case P2P_PENDING_DEV_DISC_REQUEST:
2987 p2p_dev_disc_req_cb(p2p, success);
2988 break;
2989 case P2P_PENDING_DEV_DISC_RESPONSE:
2990 p2p_dev_disc_resp_cb(p2p, success);
2991 break;
2992 case P2P_PENDING_GO_DISC_REQ:
2993 p2p_go_disc_req_cb(p2p, success);
2994 break;
2995 }
2996 }
2997
2998
p2p_listen_cb(struct p2p_data * p2p,unsigned int freq,unsigned int duration)2999 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3000 unsigned int duration)
3001 {
3002 if (freq == p2p->pending_client_disc_freq) {
3003 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3004 "P2P: Client discoverability remain-awake completed");
3005 p2p->pending_client_disc_freq = 0;
3006 return;
3007 }
3008
3009 if (freq != p2p->pending_listen_freq) {
3010 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3011 "P2P: Unexpected listen callback for freq=%u "
3012 "duration=%u (pending_listen_freq=%u)",
3013 freq, duration, p2p->pending_listen_freq);
3014 return;
3015 }
3016
3017 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3018 "P2P: Starting Listen timeout(%u,%u) on freq=%u based on "
3019 "callback",
3020 p2p->pending_listen_sec, p2p->pending_listen_usec,
3021 p2p->pending_listen_freq);
3022 p2p->in_listen = 1;
3023 p2p->drv_in_listen = freq;
3024 if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3025 /*
3026 * Add 20 msec extra wait to avoid race condition with driver
3027 * remain-on-channel end event, i.e., give driver more time to
3028 * complete the operation before our timeout expires.
3029 */
3030 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3031 p2p->pending_listen_usec + 20000);
3032 }
3033
3034 p2p->pending_listen_freq = 0;
3035 }
3036
3037
p2p_listen_end(struct p2p_data * p2p,unsigned int freq)3038 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3039 {
3040 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver ended Listen "
3041 "state (freq=%u)", freq);
3042 p2p->drv_in_listen = 0;
3043 if (p2p->in_listen)
3044 return 0; /* Internal timeout will trigger the next step */
3045
3046 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3047 if (p2p->go_neg_peer->connect_reqs >= 120) {
3048 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3049 "P2P: Timeout on sending GO Negotiation "
3050 "Request without getting response");
3051 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3052 return 0;
3053 }
3054
3055 p2p_set_state(p2p, P2P_CONNECT);
3056 p2p_connect_send(p2p, p2p->go_neg_peer);
3057 return 1;
3058 } else if (p2p->state == P2P_SEARCH) {
3059 if (p2p->p2p_scan_running) {
3060 /*
3061 * Search is already in progress. This can happen if
3062 * an Action frame RX is reported immediately after
3063 * the end of a remain-on-channel operation and the
3064 * response frame to that is sent using an offchannel
3065 * operation while in p2p_find. Avoid an attempt to
3066 * restart a scan here.
3067 */
3068 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan "
3069 "already in progress - do not try to start a "
3070 "new one");
3071 return 1;
3072 }
3073 if (p2p->pending_listen_freq) {
3074 /*
3075 * Better wait a bit if the driver is unable to start
3076 * offchannel operation for some reason. p2p_search()
3077 * will be started from internal timeout.
3078 */
3079 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Listen "
3080 "operation did not seem to start - delay "
3081 "search phase to avoid busy loop");
3082 p2p_set_timeout(p2p, 0, 100000);
3083 return 1;
3084 }
3085 if (p2p->search_delay) {
3086 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Delay "
3087 "search operation by %u ms",
3088 p2p->search_delay);
3089 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3090 (p2p->search_delay % 1000) * 1000);
3091 return 1;
3092 }
3093 p2p_search(p2p);
3094 return 1;
3095 }
3096
3097 return 0;
3098 }
3099
3100
p2p_timeout_connect(struct p2p_data * p2p)3101 static void p2p_timeout_connect(struct p2p_data *p2p)
3102 {
3103 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3104 if (p2p->go_neg_peer &&
3105 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3106 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Wait for GO "
3107 "Negotiation Confirm timed out - assume GO "
3108 "Negotiation failed");
3109 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3110 return;
3111 }
3112 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3113 p2p_listen_in_find(p2p, 0);
3114 }
3115
3116
p2p_timeout_connect_listen(struct p2p_data * p2p)3117 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3118 {
3119 if (p2p->go_neg_peer) {
3120 if (p2p->drv_in_listen) {
3121 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver is "
3122 "still in Listen state; wait for it to "
3123 "complete");
3124 return;
3125 }
3126
3127 if (p2p->go_neg_peer->connect_reqs >= 120) {
3128 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3129 "P2P: Timeout on sending GO Negotiation "
3130 "Request without getting response");
3131 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3132 return;
3133 }
3134
3135 p2p_set_state(p2p, P2P_CONNECT);
3136 p2p_connect_send(p2p, p2p->go_neg_peer);
3137 } else
3138 p2p_set_state(p2p, P2P_IDLE);
3139 }
3140
3141
p2p_timeout_wait_peer_connect(struct p2p_data * p2p)3142 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3143 {
3144 /*
3145 * TODO: could remain constantly in Listen state for some time if there
3146 * are no other concurrent uses for the radio. For now, go to listen
3147 * state once per second to give other uses a chance to use the radio.
3148 */
3149 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3150 p2p_set_timeout(p2p, 0, 500000);
3151 }
3152
3153
p2p_timeout_wait_peer_idle(struct p2p_data * p2p)3154 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3155 {
3156 struct p2p_device *dev = p2p->go_neg_peer;
3157
3158 if (dev == NULL) {
3159 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3160 "P2P: Unknown GO Neg peer - stop GO Neg wait");
3161 return;
3162 }
3163
3164 dev->wait_count++;
3165 if (dev->wait_count >= 120) {
3166 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3167 "P2P: Timeout on waiting peer to become ready for GO "
3168 "Negotiation");
3169 p2p_go_neg_failed(p2p, dev, -1);
3170 return;
3171 }
3172
3173 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3174 "P2P: Go to Listen state while waiting for the peer to become "
3175 "ready for GO Negotiation");
3176 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3177 p2p_listen_in_find(p2p, 0);
3178 }
3179
3180
p2p_timeout_sd_during_find(struct p2p_data * p2p)3181 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3182 {
3183 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3184 "P2P: Service Discovery Query timeout");
3185 if (p2p->sd_peer) {
3186 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3187 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
3188 p2p->sd_peer = NULL;
3189 }
3190 p2p_continue_find(p2p);
3191 }
3192
3193
p2p_timeout_prov_disc_during_find(struct p2p_data * p2p)3194 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3195 {
3196 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3197 "P2P: Provision Discovery Request timeout");
3198 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3199 p2p_continue_find(p2p);
3200 }
3201
3202
p2p_timeout_prov_disc_req(struct p2p_data * p2p)3203 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3204 {
3205 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3206
3207 /*
3208 * For user initiated PD requests that we have not gotten any responses
3209 * for while in IDLE state, we retry them a couple of times before
3210 * giving up.
3211 */
3212 if (!p2p->user_initiated_pd)
3213 return;
3214
3215 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3216 "P2P: User initiated Provision Discovery Request timeout");
3217
3218 if (p2p->pd_retries) {
3219 p2p->pd_retries--;
3220 p2p_retry_pd(p2p);
3221 } else {
3222 struct p2p_device *dev;
3223 int for_join = 0;
3224
3225 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3226 if (os_memcmp(p2p->pending_pd_devaddr,
3227 dev->info.p2p_device_addr, ETH_ALEN) != 0)
3228 continue;
3229 if (dev->req_config_methods &&
3230 (dev->flags & P2P_DEV_PD_FOR_JOIN))
3231 for_join = 1;
3232 }
3233
3234 if (p2p->cfg->prov_disc_fail)
3235 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3236 p2p->pending_pd_devaddr,
3237 for_join ?
3238 P2P_PROV_DISC_TIMEOUT_JOIN :
3239 P2P_PROV_DISC_TIMEOUT);
3240 p2p_reset_pending_pd(p2p);
3241 }
3242 }
3243
3244
p2p_timeout_invite(struct p2p_data * p2p)3245 static void p2p_timeout_invite(struct p2p_data *p2p)
3246 {
3247 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3248 p2p_set_state(p2p, P2P_INVITE_LISTEN);
3249 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3250 /*
3251 * Better remain on operating channel instead of listen channel
3252 * when running a group.
3253 */
3254 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Inviting in "
3255 "active GO role - wait on operating channel");
3256 p2p_set_timeout(p2p, 0, 100000);
3257 return;
3258 }
3259 p2p_listen_in_find(p2p, 0);
3260 }
3261
3262
p2p_timeout_invite_listen(struct p2p_data * p2p)3263 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3264 {
3265 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3266 p2p_set_state(p2p, P2P_INVITE);
3267 p2p_invite_send(p2p, p2p->invite_peer,
3268 p2p->invite_go_dev_addr);
3269 } else {
3270 if (p2p->invite_peer) {
3271 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3272 "P2P: Invitation Request retry limit reached");
3273 if (p2p->cfg->invitation_result)
3274 p2p->cfg->invitation_result(
3275 p2p->cfg->cb_ctx, -1, NULL);
3276 }
3277 p2p_set_state(p2p, P2P_IDLE);
3278 }
3279 }
3280
3281
p2p_state_timeout(void * eloop_ctx,void * timeout_ctx)3282 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3283 {
3284 struct p2p_data *p2p = eloop_ctx;
3285
3286 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Timeout (state=%s)",
3287 p2p_state_txt(p2p->state));
3288
3289 p2p->in_listen = 0;
3290
3291 switch (p2p->state) {
3292 case P2P_IDLE:
3293 /* Check if we timed out waiting for PD req */
3294 if (p2p->pending_action_state == P2P_PENDING_PD)
3295 p2p_timeout_prov_disc_req(p2p);
3296 break;
3297 case P2P_SEARCH:
3298 /* Check if we timed out waiting for PD req */
3299 if (p2p->pending_action_state == P2P_PENDING_PD)
3300 p2p_timeout_prov_disc_req(p2p);
3301 if (p2p->search_delay && !p2p->in_search_delay) {
3302 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Delay "
3303 "search operation by %u ms",
3304 p2p->search_delay);
3305 p2p->in_search_delay = 1;
3306 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3307 (p2p->search_delay % 1000) * 1000);
3308 break;
3309 }
3310 p2p->in_search_delay = 0;
3311 p2p_search(p2p);
3312 break;
3313 case P2P_CONNECT:
3314 p2p_timeout_connect(p2p);
3315 break;
3316 case P2P_CONNECT_LISTEN:
3317 p2p_timeout_connect_listen(p2p);
3318 break;
3319 case P2P_GO_NEG:
3320 break;
3321 case P2P_LISTEN_ONLY:
3322 /* Check if we timed out waiting for PD req */
3323 if (p2p->pending_action_state == P2P_PENDING_PD)
3324 p2p_timeout_prov_disc_req(p2p);
3325
3326 if (p2p->ext_listen_only) {
3327 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3328 "P2P: Extended Listen Timing - Listen State "
3329 "completed");
3330 p2p->ext_listen_only = 0;
3331 p2p_set_state(p2p, P2P_IDLE);
3332 }
3333 break;
3334 case P2P_WAIT_PEER_CONNECT:
3335 p2p_timeout_wait_peer_connect(p2p);
3336 break;
3337 case P2P_WAIT_PEER_IDLE:
3338 p2p_timeout_wait_peer_idle(p2p);
3339 break;
3340 case P2P_SD_DURING_FIND:
3341 p2p_timeout_sd_during_find(p2p);
3342 break;
3343 case P2P_PROVISIONING:
3344 break;
3345 case P2P_PD_DURING_FIND:
3346 p2p_timeout_prov_disc_during_find(p2p);
3347 break;
3348 case P2P_INVITE:
3349 p2p_timeout_invite(p2p);
3350 break;
3351 case P2P_INVITE_LISTEN:
3352 p2p_timeout_invite_listen(p2p);
3353 break;
3354 case P2P_SEARCH_WHEN_READY:
3355 break;
3356 case P2P_CONTINUE_SEARCH_WHEN_READY:
3357 break;
3358 }
3359 }
3360
3361
p2p_reject(struct p2p_data * p2p,const u8 * peer_addr)3362 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3363 {
3364 struct p2p_device *dev;
3365
3366 dev = p2p_get_device(p2p, peer_addr);
3367 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Local request to reject "
3368 "connection attempts by peer " MACSTR, MAC2STR(peer_addr));
3369 if (dev == NULL) {
3370 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR
3371 " unknown", MAC2STR(peer_addr));
3372 return -1;
3373 }
3374 dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3375 dev->flags |= P2P_DEV_USER_REJECTED;
3376 return 0;
3377 }
3378
3379
p2p_wps_method_text(enum p2p_wps_method method)3380 const char * p2p_wps_method_text(enum p2p_wps_method method)
3381 {
3382 switch (method) {
3383 case WPS_NOT_READY:
3384 return "not-ready";
3385 case WPS_PIN_DISPLAY:
3386 return "Display";
3387 case WPS_PIN_KEYPAD:
3388 return "Keypad";
3389 case WPS_PBC:
3390 return "PBC";
3391 }
3392
3393 return "??";
3394 }
3395
3396
p2p_go_state_text(enum p2p_go_state go_state)3397 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3398 {
3399 switch (go_state) {
3400 case UNKNOWN_GO:
3401 return "unknown";
3402 case LOCAL_GO:
3403 return "local";
3404 case REMOTE_GO:
3405 return "remote";
3406 }
3407
3408 return "??";
3409 }
3410
3411
p2p_get_peer_info(struct p2p_data * p2p,const u8 * addr,int next)3412 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3413 const u8 *addr, int next)
3414 {
3415 struct p2p_device *dev;
3416
3417 if (addr)
3418 dev = p2p_get_device(p2p, addr);
3419 else
3420 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3421
3422 if (dev && next) {
3423 dev = dl_list_first(&dev->list, struct p2p_device, list);
3424 if (&dev->list == &p2p->devices)
3425 dev = NULL;
3426 }
3427
3428 if (dev == NULL)
3429 return NULL;
3430
3431 return &dev->info;
3432 }
3433
3434
p2p_get_peer_info_txt(const struct p2p_peer_info * info,char * buf,size_t buflen)3435 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3436 char *buf, size_t buflen)
3437 {
3438 struct p2p_device *dev;
3439 int res;
3440 char *pos, *end;
3441 struct os_time now;
3442
3443 if (info == NULL)
3444 return -1;
3445
3446 dev = (struct p2p_device *) (((u8 *) info) -
3447 offsetof(struct p2p_device, info));
3448
3449 pos = buf;
3450 end = buf + buflen;
3451
3452 os_get_time(&now);
3453 res = os_snprintf(pos, end - pos,
3454 "age=%d\n"
3455 "listen_freq=%d\n"
3456 "wps_method=%s\n"
3457 "interface_addr=" MACSTR "\n"
3458 "member_in_go_dev=" MACSTR "\n"
3459 "member_in_go_iface=" MACSTR "\n"
3460 "go_neg_req_sent=%d\n"
3461 "go_state=%s\n"
3462 "dialog_token=%u\n"
3463 "intended_addr=" MACSTR "\n"
3464 "country=%c%c\n"
3465 "oper_freq=%d\n"
3466 "req_config_methods=0x%x\n"
3467 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3468 "status=%d\n"
3469 "wait_count=%u\n"
3470 "invitation_reqs=%u\n",
3471 (int) (now.sec - dev->last_seen.sec),
3472 dev->listen_freq,
3473 p2p_wps_method_text(dev->wps_method),
3474 MAC2STR(dev->interface_addr),
3475 MAC2STR(dev->member_in_go_dev),
3476 MAC2STR(dev->member_in_go_iface),
3477 dev->go_neg_req_sent,
3478 p2p_go_state_text(dev->go_state),
3479 dev->dialog_token,
3480 MAC2STR(dev->intended_addr),
3481 dev->country[0] ? dev->country[0] : '_',
3482 dev->country[1] ? dev->country[1] : '_',
3483 dev->oper_freq,
3484 dev->req_config_methods,
3485 dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3486 "[PROBE_REQ_ONLY]" : "",
3487 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3488 dev->flags & P2P_DEV_NOT_YET_READY ?
3489 "[NOT_YET_READY]" : "",
3490 dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "",
3491 dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" :
3492 "",
3493 dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3494 "[PD_PEER_DISPLAY]" : "",
3495 dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3496 "[PD_PEER_KEYPAD]" : "",
3497 dev->flags & P2P_DEV_USER_REJECTED ?
3498 "[USER_REJECTED]" : "",
3499 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3500 "[PEER_WAITING_RESPONSE]" : "",
3501 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3502 "[PREFER_PERSISTENT_GROUP]" : "",
3503 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3504 "[WAIT_GO_NEG_RESPONSE]" : "",
3505 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3506 "[WAIT_GO_NEG_CONFIRM]" : "",
3507 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3508 "[GROUP_CLIENT_ONLY]" : "",
3509 dev->flags & P2P_DEV_FORCE_FREQ ?
3510 "[FORCE_FREQ]" : "",
3511 dev->flags & P2P_DEV_PD_FOR_JOIN ?
3512 "[PD_FOR_JOIN]" : "",
3513 dev->status,
3514 dev->wait_count,
3515 dev->invitation_reqs);
3516 if (res < 0 || res >= end - pos)
3517 return pos - buf;
3518 pos += res;
3519
3520 if (dev->ext_listen_period) {
3521 res = os_snprintf(pos, end - pos,
3522 "ext_listen_period=%u\n"
3523 "ext_listen_interval=%u\n",
3524 dev->ext_listen_period,
3525 dev->ext_listen_interval);
3526 if (res < 0 || res >= end - pos)
3527 return pos - buf;
3528 pos += res;
3529 }
3530
3531 if (dev->oper_ssid_len) {
3532 res = os_snprintf(pos, end - pos,
3533 "oper_ssid=%s\n",
3534 wpa_ssid_txt(dev->oper_ssid,
3535 dev->oper_ssid_len));
3536 if (res < 0 || res >= end - pos)
3537 return pos - buf;
3538 pos += res;
3539 }
3540
3541 #ifdef CONFIG_WIFI_DISPLAY
3542 if (dev->info.wfd_subelems) {
3543 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3544 if (res < 0 || res >= end - pos)
3545 return pos - buf;
3546 pos += res;
3547
3548 pos += wpa_snprintf_hex(pos, end - pos,
3549 wpabuf_head(dev->info.wfd_subelems),
3550 wpabuf_len(dev->info.wfd_subelems));
3551
3552 res = os_snprintf(pos, end - pos, "\n");
3553 if (res < 0 || res >= end - pos)
3554 return pos - buf;
3555 pos += res;
3556 }
3557 #endif /* CONFIG_WIFI_DISPLAY */
3558
3559 return pos - buf;
3560 }
3561
3562
p2p_peer_known(struct p2p_data * p2p,const u8 * addr)3563 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3564 {
3565 return p2p_get_device(p2p, addr) != NULL;
3566 }
3567
3568
p2p_set_client_discoverability(struct p2p_data * p2p,int enabled)3569 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3570 {
3571 if (enabled) {
3572 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Client "
3573 "discoverability enabled");
3574 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3575 } else {
3576 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Client "
3577 "discoverability disabled");
3578 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3579 }
3580 }
3581
3582
p2p_build_presence_req(u32 duration1,u32 interval1,u32 duration2,u32 interval2)3583 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3584 u32 duration2, u32 interval2)
3585 {
3586 struct wpabuf *req;
3587 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3588 u8 *len;
3589
3590 req = wpabuf_alloc(100);
3591 if (req == NULL)
3592 return NULL;
3593
3594 if (duration1 || interval1) {
3595 os_memset(&desc1, 0, sizeof(desc1));
3596 desc1.count_type = 1;
3597 desc1.duration = duration1;
3598 desc1.interval = interval1;
3599 ptr1 = &desc1;
3600
3601 if (duration2 || interval2) {
3602 os_memset(&desc2, 0, sizeof(desc2));
3603 desc2.count_type = 2;
3604 desc2.duration = duration2;
3605 desc2.interval = interval2;
3606 ptr2 = &desc2;
3607 }
3608 }
3609
3610 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3611 len = p2p_buf_add_ie_hdr(req);
3612 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3613 p2p_buf_update_ie_hdr(req, len);
3614
3615 return req;
3616 }
3617
3618
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)3619 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3620 const u8 *own_interface_addr, unsigned int freq,
3621 u32 duration1, u32 interval1, u32 duration2,
3622 u32 interval2)
3623 {
3624 struct wpabuf *req;
3625
3626 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send Presence Request to "
3627 "GO " MACSTR " (own interface " MACSTR ") freq=%u dur1=%u "
3628 "int1=%u dur2=%u int2=%u",
3629 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3630 freq, duration1, interval1, duration2, interval2);
3631
3632 req = p2p_build_presence_req(duration1, interval1, duration2,
3633 interval2);
3634 if (req == NULL)
3635 return -1;
3636
3637 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3638 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3639 go_interface_addr,
3640 wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3641 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3642 "P2P: Failed to send Action frame");
3643 }
3644 wpabuf_free(req);
3645
3646 return 0;
3647 }
3648
3649
p2p_build_presence_resp(u8 status,const u8 * noa,size_t noa_len,u8 dialog_token)3650 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3651 size_t noa_len, u8 dialog_token)
3652 {
3653 struct wpabuf *resp;
3654 u8 *len;
3655
3656 resp = wpabuf_alloc(100 + noa_len);
3657 if (resp == NULL)
3658 return NULL;
3659
3660 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3661 len = p2p_buf_add_ie_hdr(resp);
3662 p2p_buf_add_status(resp, status);
3663 if (noa) {
3664 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3665 wpabuf_put_le16(resp, noa_len);
3666 wpabuf_put_data(resp, noa, noa_len);
3667 } else
3668 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3669 p2p_buf_update_ie_hdr(resp, len);
3670
3671 return resp;
3672 }
3673
3674
p2p_process_presence_req(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len,int rx_freq)3675 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3676 const u8 *sa, const u8 *data, size_t len,
3677 int rx_freq)
3678 {
3679 struct p2p_message msg;
3680 u8 status;
3681 struct wpabuf *resp;
3682 size_t g;
3683 struct p2p_group *group = NULL;
3684 int parsed = 0;
3685 u8 noa[50];
3686 int noa_len;
3687
3688 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3689 "P2P: Received P2P Action - P2P Presence Request");
3690
3691 for (g = 0; g < p2p->num_groups; g++) {
3692 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3693 ETH_ALEN) == 0) {
3694 group = p2p->groups[g];
3695 break;
3696 }
3697 }
3698 if (group == NULL) {
3699 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3700 "P2P: Ignore P2P Presence Request for unknown group "
3701 MACSTR, MAC2STR(da));
3702 return;
3703 }
3704
3705 if (p2p_parse(data, len, &msg) < 0) {
3706 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3707 "P2P: Failed to parse P2P Presence Request");
3708 status = P2P_SC_FAIL_INVALID_PARAMS;
3709 goto fail;
3710 }
3711 parsed = 1;
3712
3713 if (msg.noa == NULL) {
3714 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3715 "P2P: No NoA attribute in P2P Presence Request");
3716 status = P2P_SC_FAIL_INVALID_PARAMS;
3717 goto fail;
3718 }
3719
3720 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3721
3722 fail:
3723 if (p2p->cfg->get_noa)
3724 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3725 sizeof(noa));
3726 else
3727 noa_len = -1;
3728 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3729 noa_len > 0 ? noa_len : 0,
3730 msg.dialog_token);
3731 if (parsed)
3732 p2p_parse_free(&msg);
3733 if (resp == NULL)
3734 return;
3735
3736 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3737 if (p2p_send_action(p2p, rx_freq, sa, da, da,
3738 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3739 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3740 "P2P: Failed to send Action frame");
3741 }
3742 wpabuf_free(resp);
3743 }
3744
3745
p2p_process_presence_resp(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len)3746 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3747 const u8 *sa, const u8 *data, size_t len)
3748 {
3749 struct p2p_message msg;
3750
3751 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3752 "P2P: Received P2P Action - P2P Presence Response");
3753
3754 if (p2p_parse(data, len, &msg) < 0) {
3755 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3756 "P2P: Failed to parse P2P Presence Response");
3757 return;
3758 }
3759
3760 if (msg.status == NULL || msg.noa == NULL) {
3761 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3762 "P2P: No Status or NoA attribute in P2P Presence "
3763 "Response");
3764 p2p_parse_free(&msg);
3765 return;
3766 }
3767
3768 if (*msg.status) {
3769 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3770 "P2P: P2P Presence Request was rejected: status %u",
3771 *msg.status);
3772 p2p_parse_free(&msg);
3773 return;
3774 }
3775
3776 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3777 "P2P: P2P Presence Request was accepted");
3778 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
3779 msg.noa, msg.noa_len);
3780 /* TODO: process NoA */
3781 p2p_parse_free(&msg);
3782 }
3783
3784
p2p_ext_listen_timeout(void * eloop_ctx,void * timeout_ctx)3785 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
3786 {
3787 struct p2p_data *p2p = eloop_ctx;
3788
3789 if (p2p->ext_listen_interval) {
3790 /* Schedule next extended listen timeout */
3791 eloop_register_timeout(p2p->ext_listen_interval_sec,
3792 p2p->ext_listen_interval_usec,
3793 p2p_ext_listen_timeout, p2p, NULL);
3794 }
3795
3796 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
3797 /*
3798 * This should not really happen, but it looks like the Listen
3799 * command may fail is something else (e.g., a scan) was
3800 * running at an inconvenient time. As a workaround, allow new
3801 * Extended Listen operation to be started.
3802 */
3803 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Previous "
3804 "Extended Listen operation had not been completed - "
3805 "try again");
3806 p2p->ext_listen_only = 0;
3807 p2p_set_state(p2p, P2P_IDLE);
3808 }
3809
3810 if (p2p->state != P2P_IDLE) {
3811 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Skip Extended "
3812 "Listen timeout in active state (%s)",
3813 p2p_state_txt(p2p->state));
3814 return;
3815 }
3816
3817 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Extended Listen timeout");
3818 p2p->ext_listen_only = 1;
3819 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
3820 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Failed to start "
3821 "Listen state for Extended Listen Timing");
3822 p2p->ext_listen_only = 0;
3823 }
3824 }
3825
3826
p2p_ext_listen(struct p2p_data * p2p,unsigned int period,unsigned int interval)3827 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
3828 unsigned int interval)
3829 {
3830 if (period > 65535 || interval > 65535 || period > interval ||
3831 (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
3832 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3833 "P2P: Invalid Extended Listen Timing request: "
3834 "period=%u interval=%u", period, interval);
3835 return -1;
3836 }
3837
3838 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
3839
3840 if (interval == 0) {
3841 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3842 "P2P: Disabling Extended Listen Timing");
3843 p2p->ext_listen_period = 0;
3844 p2p->ext_listen_interval = 0;
3845 return 0;
3846 }
3847
3848 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3849 "P2P: Enabling Extended Listen Timing: period %u msec, "
3850 "interval %u msec", period, interval);
3851 p2p->ext_listen_period = period;
3852 p2p->ext_listen_interval = interval;
3853 p2p->ext_listen_interval_sec = interval / 1000;
3854 p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
3855
3856 eloop_register_timeout(p2p->ext_listen_interval_sec,
3857 p2p->ext_listen_interval_usec,
3858 p2p_ext_listen_timeout, p2p, NULL);
3859
3860 return 0;
3861 }
3862
3863
p2p_deauth_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)3864 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3865 const u8 *ie, size_t ie_len)
3866 {
3867 struct p2p_message msg;
3868
3869 if (bssid == NULL || ie == NULL)
3870 return;
3871
3872 os_memset(&msg, 0, sizeof(msg));
3873 if (p2p_parse_ies(ie, ie_len, &msg))
3874 return;
3875 if (msg.minor_reason_code == NULL)
3876 return;
3877
3878 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO,
3879 "P2P: Deauthentication notification BSSID " MACSTR
3880 " reason_code=%u minor_reason_code=%u",
3881 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3882
3883 p2p_parse_free(&msg);
3884 }
3885
3886
p2p_disassoc_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)3887 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3888 const u8 *ie, size_t ie_len)
3889 {
3890 struct p2p_message msg;
3891
3892 if (bssid == NULL || ie == NULL)
3893 return;
3894
3895 os_memset(&msg, 0, sizeof(msg));
3896 if (p2p_parse_ies(ie, ie_len, &msg))
3897 return;
3898 if (msg.minor_reason_code == NULL)
3899 return;
3900
3901 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO,
3902 "P2P: Disassociation notification BSSID " MACSTR
3903 " reason_code=%u minor_reason_code=%u",
3904 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3905
3906 p2p_parse_free(&msg);
3907 }
3908
3909
p2p_set_managed_oper(struct p2p_data * p2p,int enabled)3910 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
3911 {
3912 if (enabled) {
3913 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Managed P2P "
3914 "Device operations enabled");
3915 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
3916 } else {
3917 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Managed P2P "
3918 "Device operations disabled");
3919 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
3920 }
3921 }
3922
3923
p2p_set_listen_channel(struct p2p_data * p2p,u8 reg_class,u8 channel)3924 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel)
3925 {
3926 if (p2p_channel_to_freq(p2p->cfg->country, reg_class, channel) < 0)
3927 return -1;
3928
3929 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Set Listen channel: "
3930 "reg_class %u channel %u", reg_class, channel);
3931 p2p->cfg->reg_class = reg_class;
3932 p2p->cfg->channel = channel;
3933
3934 return 0;
3935 }
3936
3937
p2p_set_ssid_postfix(struct p2p_data * p2p,const u8 * postfix,size_t len)3938 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
3939 {
3940 wpa_hexdump_ascii(MSG_DEBUG, "P2P: New SSID postfix", postfix, len);
3941 if (postfix == NULL) {
3942 p2p->cfg->ssid_postfix_len = 0;
3943 return 0;
3944 }
3945 if (len > sizeof(p2p->cfg->ssid_postfix))
3946 return -1;
3947 os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
3948 p2p->cfg->ssid_postfix_len = len;
3949 return 0;
3950 }
3951
3952
p2p_set_oper_channel(struct p2p_data * p2p,u8 op_reg_class,u8 op_channel,int cfg_op_channel)3953 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
3954 int cfg_op_channel)
3955 {
3956 if (p2p_channel_to_freq(p2p->cfg->country, op_reg_class, op_channel)
3957 < 0)
3958 return -1;
3959
3960 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, "P2P: Set Operating channel: "
3961 "reg_class %u channel %u", op_reg_class, op_channel);
3962 p2p->cfg->op_reg_class = op_reg_class;
3963 p2p->cfg->op_channel = op_channel;
3964 p2p->cfg->cfg_op_channel = cfg_op_channel;
3965 return 0;
3966 }
3967
3968
p2p_set_pref_chan(struct p2p_data * p2p,unsigned int num_pref_chan,const struct p2p_channel * pref_chan)3969 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
3970 const struct p2p_channel *pref_chan)
3971 {
3972 struct p2p_channel *n;
3973
3974 if (pref_chan) {
3975 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
3976 if (n == NULL)
3977 return -1;
3978 os_memcpy(n, pref_chan,
3979 num_pref_chan * sizeof(struct p2p_channel));
3980 } else
3981 n = NULL;
3982
3983 os_free(p2p->cfg->pref_chan);
3984 p2p->cfg->pref_chan = n;
3985 p2p->cfg->num_pref_chan = num_pref_chan;
3986
3987 return 0;
3988 }
3989
3990
p2p_get_interface_addr(struct p2p_data * p2p,const u8 * dev_addr,u8 * iface_addr)3991 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
3992 u8 *iface_addr)
3993 {
3994 struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
3995 if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
3996 return -1;
3997 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
3998 return 0;
3999 }
4000
4001
p2p_get_dev_addr(struct p2p_data * p2p,const u8 * iface_addr,u8 * dev_addr)4002 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4003 u8 *dev_addr)
4004 {
4005 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4006 if (dev == NULL)
4007 return -1;
4008 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4009 return 0;
4010 }
4011
4012
p2p_set_peer_filter(struct p2p_data * p2p,const u8 * addr)4013 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4014 {
4015 os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4016 if (is_zero_ether_addr(p2p->peer_filter))
4017 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Disable peer "
4018 "filter");
4019 else
4020 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Enable peer "
4021 "filter for " MACSTR, MAC2STR(p2p->peer_filter));
4022 }
4023
4024
p2p_set_cross_connect(struct p2p_data * p2p,int enabled)4025 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4026 {
4027 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Cross connection %s",
4028 enabled ? "enabled" : "disabled");
4029 if (p2p->cross_connect == enabled)
4030 return;
4031 p2p->cross_connect = enabled;
4032 /* TODO: may need to tear down any action group where we are GO(?) */
4033 }
4034
4035
p2p_get_oper_freq(struct p2p_data * p2p,const u8 * iface_addr)4036 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4037 {
4038 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4039 if (dev == NULL)
4040 return -1;
4041 if (dev->oper_freq <= 0)
4042 return -1;
4043 return dev->oper_freq;
4044 }
4045
4046
p2p_set_intra_bss_dist(struct p2p_data * p2p,int enabled)4047 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4048 {
4049 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Intra BSS distribution %s",
4050 enabled ? "enabled" : "disabled");
4051 p2p->cfg->p2p_intra_bss = enabled;
4052 }
4053
4054
p2p_update_channel_list(struct p2p_data * p2p,struct p2p_channels * chan)4055 void p2p_update_channel_list(struct p2p_data *p2p, struct p2p_channels *chan)
4056 {
4057 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Update channel list");
4058 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4059 }
4060
4061
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)4062 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4063 const u8 *src, const u8 *bssid, const u8 *buf,
4064 size_t len, unsigned int wait_time)
4065 {
4066 if (p2p->p2p_scan_running) {
4067 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Delay Action "
4068 "frame TX until p2p_scan completes");
4069 if (p2p->after_scan_tx) {
4070 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Dropped "
4071 "previous pending Action frame TX");
4072 os_free(p2p->after_scan_tx);
4073 }
4074 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4075 len);
4076 if (p2p->after_scan_tx == NULL)
4077 return -1;
4078 p2p->after_scan_tx->freq = freq;
4079 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4080 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4081 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4082 p2p->after_scan_tx->len = len;
4083 p2p->after_scan_tx->wait_time = wait_time;
4084 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4085 return 0;
4086 }
4087
4088 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4089 buf, len, wait_time);
4090 }
4091
4092
p2p_set_best_channels(struct p2p_data * p2p,int freq_24,int freq_5,int freq_overall)4093 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4094 int freq_overall)
4095 {
4096 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Best channel: 2.4 GHz: %d,"
4097 " 5 GHz: %d, overall: %d", freq_24, freq_5, freq_overall);
4098 p2p->best_freq_24 = freq_24;
4099 p2p->best_freq_5 = freq_5;
4100 p2p->best_freq_overall = freq_overall;
4101 }
4102
4103
p2p_get_go_neg_peer(struct p2p_data * p2p)4104 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4105 {
4106 if (p2p == NULL || p2p->go_neg_peer == NULL)
4107 return NULL;
4108 return p2p->go_neg_peer->info.p2p_device_addr;
4109 }
4110
4111
4112 const struct p2p_peer_info *
p2p_get_peer_found(struct p2p_data * p2p,const u8 * addr,int next)4113 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4114 {
4115 struct p2p_device *dev;
4116
4117 if (addr) {
4118 dev = p2p_get_device(p2p, addr);
4119 if (!dev)
4120 return NULL;
4121
4122 if (!next) {
4123 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4124 return NULL;
4125
4126 return &dev->info;
4127 } else {
4128 do {
4129 dev = dl_list_first(&dev->list,
4130 struct p2p_device,
4131 list);
4132 if (&dev->list == &p2p->devices)
4133 return NULL;
4134 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4135 }
4136 } else {
4137 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4138 if (!dev)
4139 return NULL;
4140 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4141 dev = dl_list_first(&dev->list,
4142 struct p2p_device,
4143 list);
4144 if (&dev->list == &p2p->devices)
4145 return NULL;
4146 }
4147 }
4148
4149 return &dev->info;
4150 }
4151
4152
p2p_in_progress(struct p2p_data * p2p)4153 int p2p_in_progress(struct p2p_data *p2p)
4154 {
4155 if (p2p == NULL)
4156 return 0;
4157 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SEARCH_WHEN_READY ||
4158 p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY)
4159 return 2;
4160 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4161 }
4162
4163
p2p_set_config_timeout(struct p2p_data * p2p,u8 go_timeout,u8 client_timeout)4164 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4165 u8 client_timeout)
4166 {
4167 if (p2p) {
4168 p2p->go_timeout = go_timeout;
4169 p2p->client_timeout = client_timeout;
4170 }
4171 }
4172
4173
p2p_increase_search_delay(struct p2p_data * p2p,unsigned int delay)4174 void p2p_increase_search_delay(struct p2p_data *p2p, unsigned int delay)
4175 {
4176 if (p2p && p2p->search_delay < delay)
4177 p2p->search_delay = delay;
4178 }
4179
4180
4181 #ifdef CONFIG_WIFI_DISPLAY
4182
p2p_update_wfd_ie_groups(struct p2p_data * p2p)4183 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4184 {
4185 size_t g;
4186 struct p2p_group *group;
4187
4188 for (g = 0; g < p2p->num_groups; g++) {
4189 group = p2p->groups[g];
4190 p2p_group_update_ies(group);
4191 }
4192 }
4193
4194
p2p_set_wfd_ie_beacon(struct p2p_data * p2p,struct wpabuf * ie)4195 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4196 {
4197 wpabuf_free(p2p->wfd_ie_beacon);
4198 p2p->wfd_ie_beacon = ie;
4199 p2p_update_wfd_ie_groups(p2p);
4200 return 0;
4201 }
4202
4203
p2p_set_wfd_ie_probe_req(struct p2p_data * p2p,struct wpabuf * ie)4204 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4205 {
4206 wpabuf_free(p2p->wfd_ie_probe_req);
4207 p2p->wfd_ie_probe_req = ie;
4208 return 0;
4209 }
4210
4211
p2p_set_wfd_ie_probe_resp(struct p2p_data * p2p,struct wpabuf * ie)4212 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4213 {
4214 wpabuf_free(p2p->wfd_ie_probe_resp);
4215 p2p->wfd_ie_probe_resp = ie;
4216 p2p_update_wfd_ie_groups(p2p);
4217 return 0;
4218 }
4219
4220
p2p_set_wfd_ie_assoc_req(struct p2p_data * p2p,struct wpabuf * ie)4221 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4222 {
4223 wpabuf_free(p2p->wfd_ie_assoc_req);
4224 p2p->wfd_ie_assoc_req = ie;
4225 return 0;
4226 }
4227
4228
p2p_set_wfd_ie_invitation(struct p2p_data * p2p,struct wpabuf * ie)4229 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4230 {
4231 wpabuf_free(p2p->wfd_ie_invitation);
4232 p2p->wfd_ie_invitation = ie;
4233 return 0;
4234 }
4235
4236
p2p_set_wfd_ie_prov_disc_req(struct p2p_data * p2p,struct wpabuf * ie)4237 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4238 {
4239 wpabuf_free(p2p->wfd_ie_prov_disc_req);
4240 p2p->wfd_ie_prov_disc_req = ie;
4241 return 0;
4242 }
4243
4244
p2p_set_wfd_ie_prov_disc_resp(struct p2p_data * p2p,struct wpabuf * ie)4245 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4246 {
4247 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4248 p2p->wfd_ie_prov_disc_resp = ie;
4249 return 0;
4250 }
4251
4252
p2p_set_wfd_ie_go_neg(struct p2p_data * p2p,struct wpabuf * ie)4253 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4254 {
4255 wpabuf_free(p2p->wfd_ie_go_neg);
4256 p2p->wfd_ie_go_neg = ie;
4257 return 0;
4258 }
4259
4260
p2p_set_wfd_dev_info(struct p2p_data * p2p,const struct wpabuf * elem)4261 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4262 {
4263 wpabuf_free(p2p->wfd_dev_info);
4264 if (elem) {
4265 p2p->wfd_dev_info = wpabuf_dup(elem);
4266 if (p2p->wfd_dev_info == NULL)
4267 return -1;
4268 } else
4269 p2p->wfd_dev_info = NULL;
4270
4271 return 0;
4272 }
4273
4274
p2p_set_wfd_assoc_bssid(struct p2p_data * p2p,const struct wpabuf * elem)4275 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4276 {
4277 wpabuf_free(p2p->wfd_assoc_bssid);
4278 if (elem) {
4279 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4280 if (p2p->wfd_assoc_bssid == NULL)
4281 return -1;
4282 } else
4283 p2p->wfd_assoc_bssid = NULL;
4284
4285 return 0;
4286 }
4287
4288
p2p_set_wfd_coupled_sink_info(struct p2p_data * p2p,const struct wpabuf * elem)4289 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4290 const struct wpabuf *elem)
4291 {
4292 wpabuf_free(p2p->wfd_coupled_sink_info);
4293 if (elem) {
4294 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4295 if (p2p->wfd_coupled_sink_info == NULL)
4296 return -1;
4297 } else
4298 p2p->wfd_coupled_sink_info = NULL;
4299
4300 return 0;
4301 }
4302
4303 #endif /* CONFIG_WIFI_DISPLAY */
4304
4305
p2p_set_disc_int(struct p2p_data * p2p,int min_disc_int,int max_disc_int,int max_disc_tu)4306 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4307 int max_disc_tu)
4308 {
4309 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4310 return -1;
4311
4312 p2p->min_disc_int = min_disc_int;
4313 p2p->max_disc_int = max_disc_int;
4314 p2p->max_disc_tu = max_disc_tu;
4315 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Set discoverable interval: "
4316 "min=%d max=%d max_tu=%d", min_disc_int, max_disc_int,
4317 max_disc_tu);
4318
4319 return 0;
4320 }
4321