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 #ifdef ANDROID_P2P
46 #define P2P_PEER_EXPIRATION_AGE 30
47 #else
48 #define P2P_PEER_EXPIRATION_AGE 300
49 #endif
50
51 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
52
53 #ifdef ANDROID_P2P
p2p_connection_in_progress(struct p2p_data * p2p)54 int p2p_connection_in_progress(struct p2p_data *p2p)
55 {
56 int ret = 0;
57
58 switch (p2p->state) {
59 case P2P_CONNECT:
60 case P2P_CONNECT_LISTEN:
61 case P2P_GO_NEG:
62 case P2P_WAIT_PEER_CONNECT:
63 case P2P_WAIT_PEER_IDLE:
64 case P2P_PROVISIONING:
65 case P2P_INVITE:
66 case P2P_INVITE_LISTEN:
67 ret = 1;
68 break;
69
70 default:
71 wpa_printf(MSG_DEBUG, "p2p_connection_in_progress state %d", p2p->state);
72 ret = 0;
73 }
74
75 return ret;
76 }
77 #endif
78
p2p_expire_peers(struct p2p_data * p2p)79 static void p2p_expire_peers(struct p2p_data *p2p)
80 {
81 struct p2p_device *dev, *n;
82 struct os_time now;
83 size_t i;
84
85 os_get_time(&now);
86 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
87 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
88 continue;
89
90 if (p2p->cfg->go_connected &&
91 p2p->cfg->go_connected(p2p->cfg->cb_ctx,
92 dev->info.p2p_device_addr)) {
93 /*
94 * We are connected as a client to a group in which the
95 * peer is the GO, so do not expire the peer entry.
96 */
97 os_get_time(&dev->last_seen);
98 continue;
99 }
100
101 for (i = 0; i < p2p->num_groups; i++) {
102 if (p2p_group_is_client_connected(
103 p2p->groups[i], dev->info.p2p_device_addr))
104 break;
105 }
106 if (i < p2p->num_groups) {
107 /*
108 * The peer is connected as a client in a group where
109 * we are the GO, so do not expire the peer entry.
110 */
111 os_get_time(&dev->last_seen);
112 continue;
113 }
114
115 #ifdef ANDROID_P2P
116 /* If Connection is in progress, don't expire the peer
117 */
118 if (p2p_connection_in_progress(p2p))
119 continue;
120 #endif
121
122 wpa_msg(p2p->cfg->msg_ctx, MSG_ERROR, "P2P: Expiring old peer "
123 "entry " MACSTR, MAC2STR(dev->info.p2p_device_addr));
124 #ifdef ANDROID_P2P
125 /* SD_FAIR_POLICY: Update the current sd_dev_list pointer to next device */
126 if(&dev->list == p2p->sd_dev_list)
127 p2p->sd_dev_list = dev->list.next;
128 #endif
129 dl_list_del(&dev->list);
130 p2p_device_free(p2p, dev);
131 }
132 }
133
134
p2p_expiration_timeout(void * eloop_ctx,void * timeout_ctx)135 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
136 {
137 struct p2p_data *p2p = eloop_ctx;
138 p2p_expire_peers(p2p);
139 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
140 p2p_expiration_timeout, p2p, NULL);
141 }
142
143
p2p_state_txt(int state)144 static const char * p2p_state_txt(int state)
145 {
146 switch (state) {
147 case P2P_IDLE:
148 return "IDLE";
149 case P2P_SEARCH:
150 return "SEARCH";
151 case P2P_CONNECT:
152 return "CONNECT";
153 case P2P_CONNECT_LISTEN:
154 return "CONNECT_LISTEN";
155 case P2P_GO_NEG:
156 return "GO_NEG";
157 case P2P_LISTEN_ONLY:
158 return "LISTEN_ONLY";
159 case P2P_WAIT_PEER_CONNECT:
160 return "WAIT_PEER_CONNECT";
161 case P2P_WAIT_PEER_IDLE:
162 return "WAIT_PEER_IDLE";
163 case P2P_SD_DURING_FIND:
164 return "SD_DURING_FIND";
165 case P2P_PROVISIONING:
166 return "PROVISIONING";
167 case P2P_PD_DURING_FIND:
168 return "PD_DURING_FIND";
169 case P2P_INVITE:
170 return "INVITE";
171 case P2P_INVITE_LISTEN:
172 return "INVITE_LISTEN";
173 case P2P_SEARCH_WHEN_READY:
174 return "SEARCH_WHEN_READY";
175 default:
176 return "?";
177 }
178 }
179
180
p2p_get_provisioning_info(struct p2p_data * p2p,const u8 * addr)181 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
182 {
183 struct p2p_device *dev = NULL;
184
185 if (!addr || !p2p)
186 return 0;
187
188 dev = p2p_get_device(p2p, addr);
189 if (dev)
190 return dev->wps_prov_info;
191 else
192 return 0;
193 }
194
195
p2p_clear_provisioning_info(struct p2p_data * p2p,const u8 * iface_addr)196 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *iface_addr)
197 {
198 struct p2p_device *dev = NULL;
199
200 if (!iface_addr || !p2p)
201 return;
202
203 dev = p2p_get_device_interface(p2p, iface_addr);
204 if (dev)
205 dev->wps_prov_info = 0;
206 }
207
208
p2p_set_state(struct p2p_data * p2p,int new_state)209 void p2p_set_state(struct p2p_data *p2p, int new_state)
210 {
211 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: State %s -> %s",
212 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
213 p2p->state = new_state;
214 }
215
216
p2p_set_timeout(struct p2p_data * p2p,unsigned int sec,unsigned int usec)217 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
218 {
219 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
220 "P2P: Set timeout (state=%s): %u.%06u sec",
221 p2p_state_txt(p2p->state), sec, usec);
222 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
223 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
224 }
225
226
p2p_clear_timeout(struct p2p_data * p2p)227 void p2p_clear_timeout(struct p2p_data *p2p)
228 {
229 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Clear timeout (state=%s)",
230 p2p_state_txt(p2p->state));
231 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
232 }
233
234
p2p_go_neg_failed(struct p2p_data * p2p,struct p2p_device * peer,int status)235 void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer,
236 int status)
237 {
238 struct p2p_go_neg_results res;
239 p2p_clear_timeout(p2p);
240 p2p_set_state(p2p, P2P_IDLE);
241 if (p2p->go_neg_peer)
242 p2p->go_neg_peer->wps_method = WPS_NOT_READY;
243 p2p->go_neg_peer = NULL;
244
245 os_memset(&res, 0, sizeof(res));
246 res.status = status;
247 if (peer) {
248 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr,
249 ETH_ALEN);
250 os_memcpy(res.peer_interface_addr, peer->intended_addr,
251 ETH_ALEN);
252 }
253 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
254 }
255
256
p2p_listen_in_find(struct p2p_data * p2p)257 static void p2p_listen_in_find(struct p2p_data *p2p)
258 {
259 unsigned int r, tu;
260 int freq;
261 struct wpabuf *ies;
262
263 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
264 "P2P: Starting short listen state (state=%s)",
265 p2p_state_txt(p2p->state));
266
267 freq = p2p_channel_to_freq(p2p->cfg->country, p2p->cfg->reg_class,
268 p2p->cfg->channel);
269 if (freq < 0) {
270 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
271 "P2P: Unknown regulatory class/channel");
272 return;
273 }
274
275 os_get_random((u8 *) &r, sizeof(r));
276 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
277 p2p->min_disc_int) * 100;
278
279 p2p->pending_listen_freq = freq;
280 p2p->pending_listen_sec = 0;
281 p2p->pending_listen_usec = 1024 * tu;
282
283 ies = p2p_build_probe_resp_ies(p2p);
284 if (ies == NULL)
285 return;
286
287 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
288 ies) < 0) {
289 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
290 "P2P: Failed to start listen mode");
291 p2p->pending_listen_freq = 0;
292 }
293 wpabuf_free(ies);
294 }
295
296
p2p_listen(struct p2p_data * p2p,unsigned int timeout)297 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
298 {
299 int freq;
300 struct wpabuf *ies;
301
302 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
303 "P2P: Going to listen(only) state");
304
305 freq = p2p_channel_to_freq(p2p->cfg->country, p2p->cfg->reg_class,
306 p2p->cfg->channel);
307 if (freq < 0) {
308 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
309 "P2P: Unknown regulatory class/channel");
310 return -1;
311 }
312
313 p2p->pending_listen_freq = freq;
314 p2p->pending_listen_sec = timeout / 1000;
315 p2p->pending_listen_usec = (timeout % 1000) * 1000;
316
317 if (p2p->p2p_scan_running) {
318 if (p2p->start_after_scan == P2P_AFTER_SCAN_NOTHING) {
319 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
320 "P2P: p2p_scan running - connect is already "
321 "pending - skip listen");
322 return 0;
323 }
324 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
325 "P2P: p2p_scan running - delay start of listen state");
326 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
327 return 0;
328 }
329
330 ies = p2p_build_probe_resp_ies(p2p);
331 if (ies == NULL)
332 return -1;
333
334 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
335 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
336 "P2P: Failed to start listen mode");
337 p2p->pending_listen_freq = 0;
338 wpabuf_free(ies);
339 return -1;
340 }
341 wpabuf_free(ies);
342
343 p2p_set_state(p2p, P2P_LISTEN_ONLY);
344
345 return 0;
346 }
347
348
p2p_device_clear_reported(struct p2p_data * p2p)349 static void p2p_device_clear_reported(struct p2p_data *p2p)
350 {
351 struct p2p_device *dev;
352 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list)
353 dev->flags &= ~P2P_DEV_REPORTED;
354 }
355
356
357 /**
358 * p2p_get_device - Fetch a peer entry
359 * @p2p: P2P module context from p2p_init()
360 * @addr: P2P Device Address of the peer
361 * Returns: Pointer to the device entry or %NULL if not found
362 */
p2p_get_device(struct p2p_data * p2p,const u8 * addr)363 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
364 {
365 struct p2p_device *dev;
366 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
367 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
368 return dev;
369 }
370 return NULL;
371 }
372
373
374 /**
375 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
376 * @p2p: P2P module context from p2p_init()
377 * @addr: P2P Interface Address of the peer
378 * Returns: Pointer to the device entry or %NULL if not found
379 */
p2p_get_device_interface(struct p2p_data * p2p,const u8 * addr)380 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
381 const u8 *addr)
382 {
383 struct p2p_device *dev;
384 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
385 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
386 return dev;
387 }
388 return NULL;
389 }
390
391
392 /**
393 * p2p_create_device - Create a peer entry
394 * @p2p: P2P module context from p2p_init()
395 * @addr: P2P Device Address of the peer
396 * Returns: Pointer to the device entry or %NULL on failure
397 *
398 * If there is already an entry for the peer, it will be returned instead of
399 * creating a new one.
400 */
p2p_create_device(struct p2p_data * p2p,const u8 * addr)401 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
402 const u8 *addr)
403 {
404 struct p2p_device *dev, *oldest = NULL;
405 size_t count = 0;
406
407 dev = p2p_get_device(p2p, addr);
408 if (dev)
409 return dev;
410
411 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
412 count++;
413 if (oldest == NULL ||
414 os_time_before(&dev->last_seen, &oldest->last_seen))
415 oldest = dev;
416 }
417 if (count + 1 > p2p->cfg->max_peers && oldest) {
418 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
419 "P2P: Remove oldest peer entry to make room for a new "
420 "peer");
421 #ifdef ANDROID_P2P
422 /* SD_FAIR_POLICY: Update the current sd_dev_list pointer to next device */
423 if(&oldest->list == p2p->sd_dev_list)
424 p2p->sd_dev_list = oldest->list.next;
425 #endif
426 dl_list_del(&oldest->list);
427 p2p_device_free(p2p, oldest);
428 }
429
430 dev = os_zalloc(sizeof(*dev));
431 if (dev == NULL)
432 return NULL;
433 dl_list_add(&p2p->devices, &dev->list);
434 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
435
436 return dev;
437 }
438
439
p2p_copy_client_info(struct p2p_device * dev,struct p2p_client_info * cli)440 static void p2p_copy_client_info(struct p2p_device *dev,
441 struct p2p_client_info *cli)
442 {
443 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
444 dev->info.device_name[cli->dev_name_len] = '\0';
445 dev->info.dev_capab = cli->dev_capab;
446 dev->info.config_methods = cli->config_methods;
447 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
448 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
449 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
450 dev->info.wps_sec_dev_type_list_len);
451 }
452
453
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)454 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
455 const u8 *go_interface_addr, int freq,
456 const u8 *gi, size_t gi_len)
457 {
458 struct p2p_group_info info;
459 size_t c;
460 struct p2p_device *dev;
461
462 if (gi == NULL)
463 return 0;
464
465 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
466 return -1;
467
468 /*
469 * Clear old data for this group; if the devices are still in the
470 * group, the information will be restored in the loop following this.
471 */
472 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
473 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
474 ETH_ALEN) == 0) {
475 os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
476 os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
477 }
478 }
479
480 for (c = 0; c < info.num_clients; c++) {
481 struct p2p_client_info *cli = &info.client[c];
482 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
483 ETH_ALEN) == 0)
484 continue; /* ignore our own entry */
485 dev = p2p_get_device(p2p, cli->p2p_device_addr);
486 if (dev) {
487 /*
488 * Update information only if we have not received this
489 * directly from the client.
490 */
491 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
492 P2P_DEV_PROBE_REQ_ONLY))
493 p2p_copy_client_info(dev, cli);
494 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
495 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
496 }
497 } else {
498 dev = p2p_create_device(p2p, cli->p2p_device_addr);
499 if (dev == NULL)
500 continue;
501 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
502 p2p_copy_client_info(dev, cli);
503 dev->oper_freq = freq;
504 p2p->cfg->dev_found(p2p->cfg->cb_ctx,
505 dev->info.p2p_device_addr,
506 &dev->info, 1);
507 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
508 }
509
510 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
511 ETH_ALEN);
512 os_get_time(&dev->last_seen);
513 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
514 os_memcpy(dev->member_in_go_iface, go_interface_addr,
515 ETH_ALEN);
516 }
517
518 return 0;
519 }
520
521
p2p_copy_wps_info(struct p2p_device * dev,int probe_req,const struct p2p_message * msg)522 static void p2p_copy_wps_info(struct p2p_device *dev, int probe_req,
523 const struct p2p_message *msg)
524 {
525 os_memcpy(dev->info.device_name, msg->device_name,
526 sizeof(dev->info.device_name));
527
528 if (msg->manufacturer &&
529 msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
530 os_memset(dev->info.manufacturer, 0,
531 sizeof(dev->info.manufacturer));
532 os_memcpy(dev->info.manufacturer, msg->manufacturer,
533 msg->manufacturer_len);
534 }
535
536 if (msg->model_name &&
537 msg->model_name_len < sizeof(dev->info.model_name)) {
538 os_memset(dev->info.model_name, 0,
539 sizeof(dev->info.model_name));
540 os_memcpy(dev->info.model_name, msg->model_name,
541 msg->model_name_len);
542 }
543
544 if (msg->model_number &&
545 msg->model_number_len < sizeof(dev->info.model_number)) {
546 os_memset(dev->info.model_number, 0,
547 sizeof(dev->info.model_number));
548 os_memcpy(dev->info.model_number, msg->model_number,
549 msg->model_number_len);
550 }
551
552 if (msg->serial_number &&
553 msg->serial_number_len < sizeof(dev->info.serial_number)) {
554 os_memset(dev->info.serial_number, 0,
555 sizeof(dev->info.serial_number));
556 os_memcpy(dev->info.serial_number, msg->serial_number,
557 msg->serial_number_len);
558 }
559
560 if (msg->pri_dev_type)
561 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
562 sizeof(dev->info.pri_dev_type));
563 else if (msg->wps_pri_dev_type)
564 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
565 sizeof(dev->info.pri_dev_type));
566
567 if (msg->wps_sec_dev_type_list) {
568 os_memcpy(dev->info.wps_sec_dev_type_list,
569 msg->wps_sec_dev_type_list,
570 msg->wps_sec_dev_type_list_len);
571 dev->info.wps_sec_dev_type_list_len =
572 msg->wps_sec_dev_type_list_len;
573 }
574
575 if (msg->capability) {
576 dev->info.dev_capab = msg->capability[0];
577 dev->info.group_capab = msg->capability[1];
578 }
579
580 if (msg->ext_listen_timing) {
581 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
582 dev->ext_listen_interval =
583 WPA_GET_LE16(msg->ext_listen_timing + 2);
584 }
585 if (!probe_req) {
586 dev->info.config_methods = msg->config_methods ?
587 msg->config_methods : msg->wps_config_methods;
588 }
589 }
590
591
592 /**
593 * p2p_add_device - Add peer entries based on scan results
594 * @p2p: P2P module context from p2p_init()
595 * @addr: Source address of Beacon or Probe Response frame (may be either
596 * P2P Device Address or P2P Interface Address)
597 * @level: Signal level (signal strength of the received frame from the peer)
598 * @freq: Frequency on which the Beacon or Probe Response frame was received
599 * @ies: IEs from the Beacon or Probe Response frame
600 * @ies_len: Length of ies buffer in octets
601 * Returns: 0 on success, -1 on failure
602 *
603 * If the scan result is for a GO, the clients in the group will also be added
604 * to the peer table. This function can also be used with some other frames
605 * like Provision Discovery Request that contains P2P Capability and P2P Device
606 * Info attributes.
607 */
p2p_add_device(struct p2p_data * p2p,const u8 * addr,int freq,int level,const u8 * ies,size_t ies_len)608 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, int level,
609 const u8 *ies, size_t ies_len)
610 {
611 struct p2p_device *dev;
612 struct p2p_message msg;
613 const u8 *p2p_dev_addr;
614 int i;
615
616 os_memset(&msg, 0, sizeof(msg));
617 if (p2p_parse_ies(ies, ies_len, &msg)) {
618 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
619 "P2P: Failed to parse P2P IE for a device entry");
620 p2p_parse_free(&msg);
621 return -1;
622 }
623
624 if (msg.p2p_device_addr)
625 p2p_dev_addr = msg.p2p_device_addr;
626 else if (msg.device_id)
627 p2p_dev_addr = msg.device_id;
628 else {
629 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
630 "P2P: Ignore scan data without P2P Device Info or "
631 "P2P Device Id");
632 p2p_parse_free(&msg);
633 return -1;
634 }
635
636 if (!is_zero_ether_addr(p2p->peer_filter) &&
637 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
638 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Do not add peer "
639 "filter for " MACSTR " due to peer filter",
640 MAC2STR(p2p_dev_addr));
641 return 0;
642 }
643
644 dev = p2p_create_device(p2p, p2p_dev_addr);
645 if (dev == NULL) {
646 p2p_parse_free(&msg);
647 return -1;
648 }
649 os_get_time(&dev->last_seen);
650 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
651
652 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
653 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
654 if (msg.ssid &&
655 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
656 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
657 != 0)) {
658 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
659 dev->oper_ssid_len = msg.ssid[1];
660 }
661
662 if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
663 *msg.ds_params >= 1 && *msg.ds_params <= 14) {
664 int ds_freq;
665 if (*msg.ds_params == 14)
666 ds_freq = 2484;
667 else
668 ds_freq = 2407 + *msg.ds_params * 5;
669 if (freq != ds_freq) {
670 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
671 "P2P: Update Listen frequency based on DS "
672 "Parameter Set IE: %d -> %d MHz",
673 freq, ds_freq);
674 freq = ds_freq;
675 }
676 }
677
678 if (dev->listen_freq && dev->listen_freq != freq) {
679 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
680 "P2P: Update Listen frequency based on scan "
681 "results (" MACSTR " %d -> %d MHz (DS param %d)",
682 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
683 freq, msg.ds_params ? *msg.ds_params : -1);
684 }
685 dev->listen_freq = freq;
686 if (msg.group_info)
687 dev->oper_freq = freq;
688 dev->info.level = level;
689
690 p2p_copy_wps_info(dev, 0, &msg);
691
692 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
693 wpabuf_free(dev->info.wps_vendor_ext[i]);
694 dev->info.wps_vendor_ext[i] = NULL;
695 }
696
697 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
698 if (msg.wps_vendor_ext[i] == NULL)
699 break;
700 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
701 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
702 if (dev->info.wps_vendor_ext[i] == NULL)
703 break;
704 }
705
706 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, msg.group_info,
707 msg.group_info_len);
708
709 p2p_parse_free(&msg);
710
711 if (p2p_pending_sd_req(p2p, dev))
712 dev->flags |= P2P_DEV_SD_SCHEDULE;
713
714 if (dev->flags & P2P_DEV_REPORTED)
715 return 0;
716
717 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
718 "P2P: Peer found with Listen frequency %d MHz", freq);
719 if (dev->flags & P2P_DEV_USER_REJECTED) {
720 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
721 "P2P: Do not report rejected device");
722 return 0;
723 }
724
725 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
726 !(dev->flags & P2P_DEV_REPORTED_ONCE));
727 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
728
729 return 0;
730 }
731
732
p2p_device_free(struct p2p_data * p2p,struct p2p_device * dev)733 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
734 {
735 int i;
736
737 if (p2p->go_neg_peer == dev) {
738 /*
739 * If GO Negotiation is in progress, report that it has failed.
740 */
741 p2p_go_neg_failed(p2p, dev, -1);
742 p2p->go_neg_peer = NULL;
743 }
744 if (p2p->invite_peer == dev)
745 p2p->invite_peer = NULL;
746 if (p2p->sd_peer == dev)
747 p2p->sd_peer = NULL;
748 if (p2p->pending_client_disc_go == dev)
749 p2p->pending_client_disc_go = NULL;
750
751 /* dev_lost() device, but only if it was previously dev_found() */
752 if (dev->flags & P2P_DEV_REPORTED_ONCE)
753 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
754 dev->info.p2p_device_addr);
755
756 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
757 wpabuf_free(dev->info.wps_vendor_ext[i]);
758 dev->info.wps_vendor_ext[i] = NULL;
759 }
760
761 os_free(dev);
762 }
763
764
p2p_get_next_prog_freq(struct p2p_data * p2p)765 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
766 {
767 struct p2p_channels *c;
768 struct p2p_reg_class *cla;
769 size_t cl, ch;
770 int found = 0;
771 u8 reg_class;
772 u8 channel;
773 int freq;
774
775 c = &p2p->cfg->channels;
776 for (cl = 0; cl < c->reg_classes; cl++) {
777 cla = &c->reg_class[cl];
778 if (cla->reg_class != p2p->last_prog_scan_class)
779 continue;
780 for (ch = 0; ch < cla->channels; ch++) {
781 if (cla->channel[ch] == p2p->last_prog_scan_chan) {
782 found = 1;
783 break;
784 }
785 }
786 if (found)
787 break;
788 }
789
790 if (!found) {
791 /* Start from beginning */
792 reg_class = c->reg_class[0].reg_class;
793 channel = c->reg_class[0].channel[0];
794 } else {
795 /* Pick the next channel */
796 ch++;
797 if (ch == cla->channels) {
798 cl++;
799 if (cl == c->reg_classes)
800 cl = 0;
801 ch = 0;
802 }
803 reg_class = c->reg_class[cl].reg_class;
804 channel = c->reg_class[cl].channel[ch];
805 }
806
807 freq = p2p_channel_to_freq(p2p->cfg->country, reg_class, channel);
808 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Next progressive search "
809 "channel: reg_class %u channel %u -> %d MHz",
810 reg_class, channel, freq);
811 p2p->last_prog_scan_class = reg_class;
812 p2p->last_prog_scan_chan = channel;
813
814 if (freq == 2412 || freq == 2437 || freq == 2462)
815 return 0; /* No need to add social channels */
816 return freq;
817 }
818
819
p2p_search(struct p2p_data * p2p)820 static void p2p_search(struct p2p_data *p2p)
821 {
822 int freq = 0;
823 enum p2p_scan_type type;
824
825 if (p2p->drv_in_listen) {
826 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver is still "
827 "in Listen state - wait for it to end before "
828 "continuing");
829 return;
830 }
831 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
832
833 if (p2p->go_neg_peer) {
834 /*
835 * Only scan the known listen frequency of the peer
836 * during GO Negotiation start.
837 */
838 freq = p2p->go_neg_peer->listen_freq;
839 if (freq <= 0)
840 freq = p2p->go_neg_peer->oper_freq;
841 type = P2P_SCAN_SPECIFIC;
842 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search "
843 "for freq %u (GO Neg)", freq);
844 } else if (p2p->invite_peer) {
845 /*
846 * Only scan the known listen frequency of the peer
847 * during Invite start.
848 */
849 freq = p2p->invite_peer->listen_freq;
850 if (freq <= 0)
851 freq = p2p->invite_peer->oper_freq;
852 type = P2P_SCAN_SPECIFIC;
853 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search "
854 "for freq %u (Invite)", freq);
855 } else 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 if (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)) {
868 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
869 "P2P: Scan request failed");
870 p2p_continue_find(p2p);
871 } else {
872 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Running p2p_scan");
873 p2p->p2p_scan_running = 1;
874 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
875 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
876 p2p, NULL);
877 }
878 }
879
880
p2p_find_timeout(void * eloop_ctx,void * timeout_ctx)881 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
882 {
883 struct p2p_data *p2p = eloop_ctx;
884 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Find timeout -> stop");
885 p2p_stop_find(p2p);
886 }
887
888
p2p_run_after_scan(struct p2p_data * p2p)889 static int p2p_run_after_scan(struct p2p_data *p2p)
890 {
891 struct p2p_device *dev;
892 enum p2p_after_scan op;
893
894 if (p2p->after_scan_tx) {
895 /* TODO: schedule p2p_run_after_scan to be called from TX
896 * status callback(?) */
897 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send pending "
898 "Action frame at p2p_scan completion");
899 p2p->cfg->send_action(p2p->cfg->cb_ctx,
900 p2p->after_scan_tx->freq,
901 p2p->after_scan_tx->dst,
902 p2p->after_scan_tx->src,
903 p2p->after_scan_tx->bssid,
904 (u8 *) (p2p->after_scan_tx + 1),
905 p2p->after_scan_tx->len,
906 p2p->after_scan_tx->wait_time);
907 os_free(p2p->after_scan_tx);
908 p2p->after_scan_tx = NULL;
909 #ifdef ANDROID_P2P
910 /* For SD frames, there is a scenario, where we can receive a SD request frame during p2p_scan.
911 * At that moment, we will send the SD response from this context. After sending the SD response,
912 * we need to continue p2p_find. But if we return 1 from here, p2p_find is going to be stopped.
913 */
914 return 0;
915 #else
916 return 1;
917 #endif
918 }
919
920 op = p2p->start_after_scan;
921 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
922 switch (op) {
923 case P2P_AFTER_SCAN_NOTHING:
924 break;
925 case P2P_AFTER_SCAN_LISTEN:
926 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Start previously "
927 "requested Listen state");
928 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
929 p2p->pending_listen_usec / 1000);
930 return 1;
931 case P2P_AFTER_SCAN_CONNECT:
932 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Start previously "
933 "requested connect with " MACSTR,
934 MAC2STR(p2p->after_scan_peer));
935 dev = p2p_get_device(p2p, p2p->after_scan_peer);
936 if (dev == NULL) {
937 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer not "
938 "known anymore");
939 break;
940 }
941 p2p_connect_send(p2p, dev);
942 return 1;
943 }
944
945 return 0;
946 }
947
948
p2p_scan_timeout(void * eloop_ctx,void * timeout_ctx)949 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
950 {
951 struct p2p_data *p2p = eloop_ctx;
952 int running;
953 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan timeout "
954 "(running=%d)", p2p->p2p_scan_running);
955 running = p2p->p2p_scan_running;
956 /* Make sure we recover from missed scan results callback */
957 p2p->p2p_scan_running = 0;
958
959 if (running)
960 p2p_run_after_scan(p2p);
961 }
962
963
p2p_free_req_dev_types(struct p2p_data * p2p)964 static void p2p_free_req_dev_types(struct p2p_data *p2p)
965 {
966 p2p->num_req_dev_types = 0;
967 os_free(p2p->req_dev_types);
968 p2p->req_dev_types = NULL;
969 }
970
971
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)972 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
973 enum p2p_discovery_type type,
974 unsigned int num_req_dev_types, const u8 *req_dev_types,
975 const u8 *dev_id)
976 {
977 int res;
978
979 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting find (type=%d)",
980 type);
981 if (p2p->p2p_scan_running) {
982 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan is "
983 "already running");
984 }
985
986 p2p_free_req_dev_types(p2p);
987 if (req_dev_types && num_req_dev_types) {
988 p2p->req_dev_types = os_malloc(num_req_dev_types *
989 WPS_DEV_TYPE_LEN);
990 if (p2p->req_dev_types == NULL)
991 return -1;
992 os_memcpy(p2p->req_dev_types, req_dev_types,
993 num_req_dev_types * WPS_DEV_TYPE_LEN);
994 p2p->num_req_dev_types = num_req_dev_types;
995 }
996
997 if (dev_id) {
998 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
999 p2p->find_dev_id = p2p->find_dev_id_buf;
1000 } else
1001 p2p->find_dev_id = NULL;
1002
1003 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1004 p2p_clear_timeout(p2p);
1005 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1006 p2p->find_type = type;
1007 p2p_device_clear_reported(p2p);
1008 p2p_set_state(p2p, P2P_SEARCH);
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 break;
1021 case P2P_FIND_ONLY_SOCIAL:
1022 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1023 p2p->num_req_dev_types,
1024 p2p->req_dev_types, dev_id);
1025 break;
1026 default:
1027 return -1;
1028 }
1029
1030 if (res == 0) {
1031 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Running p2p_scan");
1032 p2p->p2p_scan_running = 1;
1033 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1034 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1035 p2p, NULL);
1036 } else if (res == 1) {
1037 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Could not start "
1038 "p2p_scan at this point - will try again after "
1039 "previous scan completes");
1040 res = 0;
1041 p2p_set_state(p2p, P2P_SEARCH_WHEN_READY);
1042 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1043 } else {
1044 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Failed to start "
1045 "p2p_scan");
1046 p2p_set_state(p2p, P2P_IDLE);
1047 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1048 }
1049
1050 return res;
1051 }
1052
1053 #ifdef ANDROID_P2P
p2p_search_pending(struct p2p_data * p2p)1054 int p2p_search_pending(struct p2p_data *p2p)
1055 {
1056 if(p2p == NULL)
1057 return 0;
1058
1059 if(p2p->state == P2P_SEARCH_WHEN_READY)
1060 return 1;
1061
1062 return 0;
1063 }
1064 #endif
1065
p2p_other_scan_completed(struct p2p_data * p2p)1066 int p2p_other_scan_completed(struct p2p_data *p2p)
1067 {
1068 if (p2p->state != P2P_SEARCH_WHEN_READY)
1069 return 0;
1070 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting pending P2P find "
1071 "now that previous scan was completed");
1072 if (p2p_find(p2p, p2p->last_p2p_find_timeout, p2p->find_type,
1073 p2p->num_req_dev_types, p2p->req_dev_types,
1074 p2p->find_dev_id) < 0)
1075 return 0;
1076 return 1;
1077 }
1078
1079
p2p_stop_find_for_freq(struct p2p_data * p2p,int freq)1080 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1081 {
1082 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Stopping find");
1083 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1084 p2p_clear_timeout(p2p);
1085 if (p2p->state == P2P_SEARCH)
1086 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, P2P_EVENT_FIND_STOPPED);
1087 p2p_set_state(p2p, P2P_IDLE);
1088 p2p_free_req_dev_types(p2p);
1089 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1090 p2p->go_neg_peer = NULL;
1091 p2p->sd_peer = NULL;
1092 p2p->invite_peer = NULL;
1093 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1094 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Skip stop_listen "
1095 "since we are on correct channel for response");
1096 return;
1097 }
1098 if (p2p->drv_in_listen) {
1099 /*
1100 * The driver may not deliver callback to p2p_listen_end()
1101 * when the operation gets canceled, so clear the internal
1102 * variable that is tracking driver state.
1103 */
1104 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Clear "
1105 "drv_in_listen (%d)", p2p->drv_in_listen);
1106 p2p->drv_in_listen = 0;
1107 }
1108 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1109 }
1110
1111
p2p_stop_find(struct p2p_data * p2p)1112 void p2p_stop_find(struct p2p_data *p2p)
1113 {
1114 p2p_stop_find_for_freq(p2p, 0);
1115 }
1116
1117
p2p_prepare_channel(struct p2p_data * p2p,unsigned int force_freq)1118 static int p2p_prepare_channel(struct p2p_data *p2p, unsigned int force_freq)
1119 {
1120 if (force_freq) {
1121 u8 op_reg_class, op_channel;
1122 if (p2p_freq_to_channel(p2p->cfg->country, force_freq,
1123 &op_reg_class, &op_channel) < 0) {
1124 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1125 "P2P: Unsupported frequency %u MHz",
1126 force_freq);
1127 return -1;
1128 }
1129 if (!p2p_channels_includes(&p2p->cfg->channels, op_reg_class,
1130 op_channel)) {
1131 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1132 "P2P: Frequency %u MHz (oper_class %u "
1133 "channel %u) not allowed for P2P",
1134 force_freq, op_reg_class, op_channel);
1135 return -1;
1136 }
1137 p2p->op_reg_class = op_reg_class;
1138 p2p->op_channel = op_channel;
1139 p2p->channels.reg_classes = 1;
1140 p2p->channels.reg_class[0].channels = 1;
1141 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1142 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1143 } else {
1144 u8 op_reg_class, op_channel;
1145
1146 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1147 p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1148 p2p_freq_to_channel(p2p->cfg->country,
1149 p2p->best_freq_overall,
1150 &op_reg_class, &op_channel) == 0) {
1151 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1152 "P2P: Select best overall channel as "
1153 "operating channel preference");
1154 p2p->op_reg_class = op_reg_class;
1155 p2p->op_channel = op_channel;
1156 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1157 p2p_supported_freq(p2p, p2p->best_freq_5) &&
1158 p2p_freq_to_channel(p2p->cfg->country,
1159 p2p->best_freq_5,
1160 &op_reg_class, &op_channel) ==
1161 0) {
1162 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1163 "P2P: Select best 5 GHz channel as "
1164 "operating channel preference");
1165 p2p->op_reg_class = op_reg_class;
1166 p2p->op_channel = op_channel;
1167 } else if (!p2p->cfg->cfg_op_channel &&
1168 p2p->best_freq_24 > 0 &&
1169 p2p_supported_freq(p2p, p2p->best_freq_24) &&
1170 p2p_freq_to_channel(p2p->cfg->country,
1171 p2p->best_freq_24,
1172 &op_reg_class, &op_channel) ==
1173 0) {
1174 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1175 "P2P: Select best 2.4 GHz channel as "
1176 "operating channel preference");
1177 p2p->op_reg_class = op_reg_class;
1178 p2p->op_channel = op_channel;
1179 } else {
1180 p2p->op_reg_class = p2p->cfg->op_reg_class;
1181 p2p->op_channel = p2p->cfg->op_channel;
1182 }
1183
1184 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1185 sizeof(struct p2p_channels));
1186 }
1187 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1188 "P2P: Own preference for operation channel: "
1189 "Operating Class %u Channel %u%s",
1190 p2p->op_reg_class, p2p->op_channel,
1191 force_freq ? " (forced)" : "");
1192
1193 return 0;
1194 }
1195
1196
p2p_set_dev_persistent(struct p2p_device * dev,int persistent_group)1197 static void p2p_set_dev_persistent(struct p2p_device *dev,
1198 int persistent_group)
1199 {
1200 switch (persistent_group) {
1201 case 0:
1202 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1203 P2P_DEV_PREFER_PERSISTENT_RECONN);
1204 break;
1205 case 1:
1206 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1207 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1208 break;
1209 case 2:
1210 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1211 P2P_DEV_PREFER_PERSISTENT_RECONN;
1212 break;
1213 }
1214 }
1215
1216
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)1217 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1218 enum p2p_wps_method wps_method,
1219 int go_intent, const u8 *own_interface_addr,
1220 unsigned int force_freq, int persistent_group)
1221 {
1222 struct p2p_device *dev;
1223
1224 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1225 "P2P: Request to start group negotiation - peer=" MACSTR
1226 " GO Intent=%d Intended Interface Address=" MACSTR
1227 " wps_method=%d persistent_group=%d",
1228 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1229 wps_method, persistent_group);
1230
1231 if (p2p_prepare_channel(p2p, force_freq) < 0)
1232 return -1;
1233
1234 p2p->ssid_set = 0;
1235 dev = p2p_get_device(p2p, peer_addr);
1236 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1237 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1238 "P2P: Cannot connect to unknown P2P Device " MACSTR,
1239 MAC2STR(peer_addr));
1240 return -1;
1241 }
1242
1243 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1244 if (!(dev->info.dev_capab &
1245 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1246 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1247 "P2P: Cannot connect to P2P Device " MACSTR
1248 " that is in a group and is not discoverable",
1249 MAC2STR(peer_addr));
1250 return -1;
1251 }
1252 if (dev->oper_freq <= 0) {
1253 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1254 "P2P: Cannot connect to P2P Device " MACSTR
1255 " with incomplete information",
1256 MAC2STR(peer_addr));
1257 return -1;
1258 }
1259
1260 /*
1261 * First, try to connect directly. If the peer does not
1262 * acknowledge frames, assume it is sleeping and use device
1263 * discoverability via the GO at that point.
1264 */
1265 }
1266
1267 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1268 dev->flags &= ~P2P_DEV_USER_REJECTED;
1269 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1270 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1271 dev->connect_reqs = 0;
1272 dev->go_neg_req_sent = 0;
1273 dev->go_state = UNKNOWN_GO;
1274 p2p_set_dev_persistent(dev, persistent_group);
1275 p2p->go_intent = go_intent;
1276 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1277
1278 if (p2p->state != P2P_IDLE)
1279 p2p_stop_find(p2p);
1280
1281 if (p2p->after_scan_tx) {
1282 /*
1283 * We need to drop the pending frame to avoid issues with the
1284 * new GO Negotiation, e.g., when the pending frame was from a
1285 * previous attempt at starting a GO Negotiation.
1286 */
1287 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Dropped "
1288 "previous pending Action frame TX that was waiting "
1289 "for p2p_scan completion");
1290 os_free(p2p->after_scan_tx);
1291 p2p->after_scan_tx = NULL;
1292 }
1293
1294 dev->wps_method = wps_method;
1295 dev->status = P2P_SC_SUCCESS;
1296
1297 if (force_freq)
1298 dev->flags |= P2P_DEV_FORCE_FREQ;
1299 else
1300 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1301
1302 if (p2p->p2p_scan_running) {
1303 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1304 "P2P: p2p_scan running - delay connect send");
1305 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1306 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1307 return 0;
1308 }
1309 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1310
1311 return p2p_connect_send(p2p, dev);
1312 }
1313
1314
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)1315 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1316 enum p2p_wps_method wps_method,
1317 int go_intent, const u8 *own_interface_addr,
1318 unsigned int force_freq, int persistent_group)
1319 {
1320 struct p2p_device *dev;
1321
1322 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1323 "P2P: Request to authorize group negotiation - peer=" MACSTR
1324 " GO Intent=%d Intended Interface Address=" MACSTR
1325 " wps_method=%d persistent_group=%d",
1326 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1327 wps_method, persistent_group);
1328
1329 if (p2p_prepare_channel(p2p, force_freq) < 0)
1330 return -1;
1331
1332 dev = p2p_get_device(p2p, peer_addr);
1333 if (dev == NULL) {
1334 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1335 "P2P: Cannot authorize unknown P2P Device " MACSTR,
1336 MAC2STR(peer_addr));
1337 return -1;
1338 }
1339
1340 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1341 dev->flags &= ~P2P_DEV_USER_REJECTED;
1342 dev->go_neg_req_sent = 0;
1343 dev->go_state = UNKNOWN_GO;
1344 p2p_set_dev_persistent(dev, persistent_group);
1345 p2p->go_intent = go_intent;
1346 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1347
1348 dev->wps_method = wps_method;
1349 dev->status = P2P_SC_SUCCESS;
1350
1351 if (force_freq)
1352 dev->flags |= P2P_DEV_FORCE_FREQ;
1353 else
1354 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1355
1356 return 0;
1357 }
1358
1359
p2p_add_dev_info(struct p2p_data * p2p,const u8 * addr,struct p2p_device * dev,struct p2p_message * msg)1360 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1361 struct p2p_device *dev, struct p2p_message *msg)
1362 {
1363 os_get_time(&dev->last_seen);
1364
1365 p2p_copy_wps_info(dev, 0, msg);
1366
1367 if (msg->listen_channel) {
1368 int freq;
1369 freq = p2p_channel_to_freq((char *) msg->listen_channel,
1370 msg->listen_channel[3],
1371 msg->listen_channel[4]);
1372 if (freq < 0) {
1373 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1374 "P2P: Unknown peer Listen channel: "
1375 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1376 msg->listen_channel[0],
1377 msg->listen_channel[1],
1378 msg->listen_channel[2],
1379 msg->listen_channel[3],
1380 msg->listen_channel[4]);
1381 } else {
1382 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Update "
1383 "peer " MACSTR " Listen channel: %u -> %u MHz",
1384 MAC2STR(dev->info.p2p_device_addr),
1385 dev->listen_freq, freq);
1386 dev->listen_freq = freq;
1387 }
1388 }
1389
1390 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1391 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1392 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1393 "P2P: Completed device entry based on data from "
1394 "GO Negotiation Request");
1395 } else {
1396 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1397 "P2P: Created device entry based on GO Neg Req: "
1398 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1399 "listen_freq=%d",
1400 MAC2STR(dev->info.p2p_device_addr),
1401 dev->info.dev_capab, dev->info.group_capab,
1402 dev->info.device_name, dev->listen_freq);
1403 }
1404
1405 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1406
1407 if (dev->flags & P2P_DEV_USER_REJECTED) {
1408 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1409 "P2P: Do not report rejected device");
1410 return;
1411 }
1412
1413 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1414 !(dev->flags & P2P_DEV_REPORTED_ONCE));
1415 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1416 }
1417
1418
p2p_build_ssid(struct p2p_data * p2p,u8 * ssid,size_t * ssid_len)1419 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1420 {
1421 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1422 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1423 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1424 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1425 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1426 }
1427
1428
p2p_go_params(struct p2p_data * p2p,struct p2p_go_neg_results * params)1429 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1430 {
1431 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len);
1432 p2p_random(params->passphrase, 8);
1433 return 0;
1434 }
1435
1436
p2p_go_complete(struct p2p_data * p2p,struct p2p_device * peer)1437 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1438 {
1439 struct p2p_go_neg_results res;
1440 int go = peer->go_state == LOCAL_GO;
1441 struct p2p_channels intersection;
1442 int freqs;
1443 size_t i, j;
1444
1445 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1446 "P2P: GO Negotiation with " MACSTR " completed (%s will be "
1447 "GO)", MAC2STR(peer->info.p2p_device_addr),
1448 go ? "local end" : "peer");
1449
1450 os_memset(&res, 0, sizeof(res));
1451 res.role_go = go;
1452 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1453 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1454 res.wps_method = peer->wps_method;
1455 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1456 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1457 res.persistent_group = 2;
1458 else
1459 res.persistent_group = 1;
1460 }
1461
1462 if (go) {
1463 /* Setup AP mode for WPS provisioning */
1464 res.freq = p2p_channel_to_freq(p2p->cfg->country,
1465 p2p->op_reg_class,
1466 p2p->op_channel);
1467 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1468 res.ssid_len = p2p->ssid_len;
1469 p2p_random(res.passphrase, 8);
1470 } else {
1471 res.freq = peer->oper_freq;
1472 if (p2p->ssid_len) {
1473 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1474 res.ssid_len = p2p->ssid_len;
1475 }
1476 }
1477
1478 p2p_channels_intersect(&p2p->channels, &peer->channels,
1479 &intersection);
1480 freqs = 0;
1481 for (i = 0; i < intersection.reg_classes; i++) {
1482 struct p2p_reg_class *c = &intersection.reg_class[i];
1483 if (freqs + 1 == P2P_MAX_CHANNELS)
1484 break;
1485 for (j = 0; j < c->channels; j++) {
1486 int freq;
1487 if (freqs + 1 == P2P_MAX_CHANNELS)
1488 break;
1489 freq = p2p_channel_to_freq(peer->country, c->reg_class,
1490 c->channel[j]);
1491 if (freq < 0)
1492 continue;
1493 res.freq_list[freqs++] = freq;
1494 }
1495 }
1496
1497 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1498
1499 p2p_clear_timeout(p2p);
1500 p2p->ssid_set = 0;
1501 peer->go_neg_req_sent = 0;
1502 peer->wps_method = WPS_NOT_READY;
1503
1504 p2p_set_state(p2p, P2P_PROVISIONING);
1505 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1506 }
1507
1508
p2p_rx_p2p_action(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len,int rx_freq)1509 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1510 const u8 *data, size_t len, int rx_freq)
1511 {
1512 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1513 "P2P: RX P2P Public Action from " MACSTR, MAC2STR(sa));
1514 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1515
1516 if (len < 1)
1517 return;
1518
1519 switch (data[0]) {
1520 case P2P_GO_NEG_REQ:
1521 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1522 break;
1523 case P2P_GO_NEG_RESP:
1524 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1525 break;
1526 case P2P_GO_NEG_CONF:
1527 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1528 break;
1529 case P2P_INVITATION_REQ:
1530 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1531 rx_freq);
1532 break;
1533 case P2P_INVITATION_RESP:
1534 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1535 break;
1536 case P2P_PROV_DISC_REQ:
1537 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1538 break;
1539 case P2P_PROV_DISC_RESP:
1540 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1541 break;
1542 case P2P_DEV_DISC_REQ:
1543 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1544 break;
1545 case P2P_DEV_DISC_RESP:
1546 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1547 break;
1548 default:
1549 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1550 "P2P: Unsupported P2P Public Action frame type %d",
1551 data[0]);
1552 break;
1553 }
1554 }
1555
1556
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)1557 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1558 const u8 *sa, const u8 *bssid, const u8 *data,
1559 size_t len, int freq)
1560 {
1561 if (len < 1)
1562 return;
1563
1564 switch (data[0]) {
1565 case WLAN_PA_VENDOR_SPECIFIC:
1566 data++;
1567 len--;
1568 if (len < 3)
1569 return;
1570 if (WPA_GET_BE24(data) != OUI_WFA)
1571 return;
1572
1573 data += 3;
1574 len -= 3;
1575 if (len < 1)
1576 return;
1577
1578 if (*data != P2P_OUI_TYPE)
1579 return;
1580
1581 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq);
1582 break;
1583 case WLAN_PA_GAS_INITIAL_REQ:
1584 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1585 break;
1586 case WLAN_PA_GAS_INITIAL_RESP:
1587 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1588 break;
1589 case WLAN_PA_GAS_COMEBACK_REQ:
1590 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1591 break;
1592 case WLAN_PA_GAS_COMEBACK_RESP:
1593 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1594 break;
1595 }
1596 }
1597
1598
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)1599 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1600 const u8 *bssid, u8 category,
1601 const u8 *data, size_t len, int freq)
1602 {
1603 if (category == WLAN_ACTION_PUBLIC) {
1604 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1605 return;
1606 }
1607
1608 if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1609 return;
1610
1611 if (len < 4)
1612 return;
1613
1614 if (WPA_GET_BE24(data) != OUI_WFA)
1615 return;
1616 data += 3;
1617 len -= 3;
1618
1619 if (*data != P2P_OUI_TYPE)
1620 return;
1621 data++;
1622 len--;
1623
1624 /* P2P action frame */
1625 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1626 "P2P: RX P2P Action from " MACSTR, MAC2STR(sa));
1627 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1628
1629 if (len < 1)
1630 return;
1631 switch (data[0]) {
1632 case P2P_NOA:
1633 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1634 "P2P: Received P2P Action - Notice of Absence");
1635 /* TODO */
1636 break;
1637 case P2P_PRESENCE_REQ:
1638 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1639 break;
1640 case P2P_PRESENCE_RESP:
1641 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1642 break;
1643 case P2P_GO_DISC_REQ:
1644 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1645 break;
1646 default:
1647 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1648 "P2P: Received P2P Action - unknown type %u", data[0]);
1649 break;
1650 }
1651 }
1652
1653
p2p_go_neg_start(void * eloop_ctx,void * timeout_ctx)1654 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1655 {
1656 struct p2p_data *p2p = eloop_ctx;
1657 if (p2p->go_neg_peer == NULL)
1658 return;
1659 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1660 p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1661 p2p_connect_send(p2p, p2p->go_neg_peer);
1662 }
1663
1664
p2p_invite_start(void * eloop_ctx,void * timeout_ctx)1665 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1666 {
1667 struct p2p_data *p2p = eloop_ctx;
1668 if (p2p->invite_peer == NULL)
1669 return;
1670 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1671 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr);
1672 }
1673
1674
p2p_add_dev_from_probe_req(struct p2p_data * p2p,const u8 * addr,const u8 * ie,size_t ie_len)1675 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1676 const u8 *ie, size_t ie_len)
1677 {
1678 struct p2p_message msg;
1679 struct p2p_device *dev;
1680
1681 os_memset(&msg, 0, sizeof(msg));
1682 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1683 {
1684 p2p_parse_free(&msg);
1685 return; /* not a P2P probe */
1686 }
1687
1688 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1689 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1690 != 0) {
1691 /* The Probe Request is not part of P2P Device Discovery. It is
1692 * not known whether the source address of the frame is the P2P
1693 * Device Address or P2P Interface Address. Do not add a new
1694 * peer entry based on this frames.
1695 */
1696 p2p_parse_free(&msg);
1697 return;
1698 }
1699
1700 dev = p2p_get_device(p2p, addr);
1701 if (dev) {
1702 if (dev->country[0] == 0 && msg.listen_channel)
1703 os_memcpy(dev->country, msg.listen_channel, 3);
1704 os_get_time(&dev->last_seen);
1705 p2p_parse_free(&msg);
1706 return; /* already known */
1707 }
1708
1709 dev = p2p_create_device(p2p, addr);
1710 if (dev == NULL) {
1711 p2p_parse_free(&msg);
1712 return;
1713 }
1714
1715 os_get_time(&dev->last_seen);
1716 dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1717
1718 if (msg.listen_channel) {
1719 os_memcpy(dev->country, msg.listen_channel, 3);
1720 dev->listen_freq = p2p_channel_to_freq(dev->country,
1721 msg.listen_channel[3],
1722 msg.listen_channel[4]);
1723 }
1724
1725 p2p_copy_wps_info(dev, 1, &msg);
1726
1727 p2p_parse_free(&msg);
1728
1729 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1730 "P2P: Created device entry based on Probe Req: " MACSTR
1731 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1732 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1733 dev->info.group_capab, dev->info.device_name,
1734 dev->listen_freq);
1735 }
1736
1737
p2p_add_dev_from_go_neg_req(struct p2p_data * p2p,const u8 * addr,struct p2p_message * msg)1738 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1739 const u8 *addr,
1740 struct p2p_message *msg)
1741 {
1742 struct p2p_device *dev;
1743
1744 dev = p2p_get_device(p2p, addr);
1745 if (dev) {
1746 os_get_time(&dev->last_seen);
1747 return dev; /* already known */
1748 }
1749
1750 dev = p2p_create_device(p2p, addr);
1751 if (dev == NULL)
1752 return NULL;
1753
1754 p2p_add_dev_info(p2p, addr, dev, msg);
1755
1756 return dev;
1757 }
1758
1759
dev_type_match(const u8 * dev_type,const u8 * req_dev_type)1760 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1761 {
1762 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1763 return 1;
1764 if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1765 WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1766 WPA_GET_BE16(&req_dev_type[6]) == 0)
1767 return 1; /* Category match with wildcard OUI/sub-category */
1768 return 0;
1769 }
1770
1771
dev_type_list_match(const u8 * dev_type,const u8 * req_dev_type[],size_t num_req_dev_type)1772 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1773 size_t num_req_dev_type)
1774 {
1775 size_t i;
1776 for (i = 0; i < num_req_dev_type; i++) {
1777 if (dev_type_match(dev_type, req_dev_type[i]))
1778 return 1;
1779 }
1780 return 0;
1781 }
1782
1783
1784 /**
1785 * p2p_match_dev_type - Match local device type with requested type
1786 * @p2p: P2P module context from p2p_init()
1787 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1788 * Returns: 1 on match, 0 on mismatch
1789 *
1790 * This function can be used to match the Requested Device Type attribute in
1791 * WPS IE with the local device types for deciding whether to reply to a Probe
1792 * Request frame.
1793 */
p2p_match_dev_type(struct p2p_data * p2p,struct wpabuf * wps)1794 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
1795 {
1796 struct wps_parse_attr attr;
1797 size_t i;
1798
1799 if (wps_parse_msg(wps, &attr))
1800 return 1; /* assume no Requested Device Type attributes */
1801
1802 if (attr.num_req_dev_type == 0)
1803 return 1; /* no Requested Device Type attributes -> match */
1804
1805 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
1806 attr.num_req_dev_type))
1807 return 1; /* Own Primary Device Type matches */
1808
1809 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
1810 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
1811 attr.req_dev_type,
1812 attr.num_req_dev_type))
1813 return 1; /* Own Secondary Device Type matches */
1814
1815 /* No matching device type found */
1816 return 0;
1817 }
1818
1819
p2p_build_probe_resp_ies(struct p2p_data * p2p)1820 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
1821 {
1822 struct wpabuf *buf;
1823 u8 *len;
1824
1825 buf = wpabuf_alloc(1000);
1826 if (buf == NULL)
1827 return NULL;
1828
1829 p2p_build_wps_ie(p2p, buf, DEV_PW_DEFAULT, 1);
1830
1831 /* P2P IE */
1832 len = p2p_buf_add_ie_hdr(buf);
1833 p2p_buf_add_capability(buf, p2p->dev_capab, 0);
1834 if (p2p->ext_listen_interval)
1835 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
1836 p2p->ext_listen_interval);
1837 p2p_buf_add_device_info(buf, p2p, NULL);
1838 p2p_buf_update_ie_hdr(buf, len);
1839
1840 return buf;
1841 }
1842
1843
is_11b(u8 rate)1844 static int is_11b(u8 rate)
1845 {
1846 return rate == 0x02 || rate == 0x04 || rate == 0x0b || rate == 0x16;
1847 }
1848
1849
supp_rates_11b_only(struct ieee802_11_elems * elems)1850 static int supp_rates_11b_only(struct ieee802_11_elems *elems)
1851 {
1852 int num_11b = 0, num_others = 0;
1853 int i;
1854
1855 if (elems->supp_rates == NULL && elems->ext_supp_rates == NULL)
1856 return 0;
1857
1858 for (i = 0; elems->supp_rates && i < elems->supp_rates_len; i++) {
1859 if (is_11b(elems->supp_rates[i]))
1860 num_11b++;
1861 else
1862 num_others++;
1863 }
1864
1865 for (i = 0; elems->ext_supp_rates && i < elems->ext_supp_rates_len;
1866 i++) {
1867 if (is_11b(elems->ext_supp_rates[i]))
1868 num_11b++;
1869 else
1870 num_others++;
1871 }
1872
1873 return num_11b > 0 && num_others == 0;
1874 }
1875
1876
p2p_reply_probe(struct p2p_data * p2p,const u8 * addr,const u8 * dst,const u8 * bssid,const u8 * ie,size_t ie_len)1877 static void p2p_reply_probe(struct p2p_data *p2p, const u8 *addr,
1878 const u8 *dst, const u8 *bssid, const u8 *ie,
1879 size_t ie_len)
1880 {
1881 struct ieee802_11_elems elems;
1882 struct wpabuf *buf;
1883 struct ieee80211_mgmt *resp;
1884 struct p2p_message msg;
1885 struct wpabuf *ies;
1886
1887 if (!p2p->in_listen || !p2p->drv_in_listen) {
1888 /* not in Listen state - ignore Probe Request */
1889 return;
1890 }
1891
1892 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
1893 ParseFailed) {
1894 /* Ignore invalid Probe Request frames */
1895 return;
1896 }
1897
1898 if (elems.p2p == NULL) {
1899 /* not a P2P probe - ignore it */
1900 return;
1901 }
1902
1903 if (dst && !is_broadcast_ether_addr(dst) &&
1904 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
1905 /* Not sent to the broadcast address or our P2P Device Address
1906 */
1907 return;
1908 }
1909
1910 if (bssid && !is_broadcast_ether_addr(bssid)) {
1911 /* Not sent to the Wildcard BSSID */
1912 return;
1913 }
1914
1915 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
1916 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
1917 0) {
1918 /* not using P2P Wildcard SSID - ignore */
1919 return;
1920 }
1921
1922 if (supp_rates_11b_only(&elems)) {
1923 /* Indicates support for 11b rates only */
1924 return;
1925 }
1926
1927 os_memset(&msg, 0, sizeof(msg));
1928 if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
1929 /* Could not parse P2P attributes */
1930 return;
1931 }
1932
1933 if (msg.device_id &&
1934 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN != 0)) {
1935 /* Device ID did not match */
1936 p2p_parse_free(&msg);
1937 return;
1938 }
1939
1940 /* Check Requested Device Type match */
1941 if (msg.wps_attributes &&
1942 !p2p_match_dev_type(p2p, msg.wps_attributes)) {
1943 /* No match with Requested Device Type */
1944 p2p_parse_free(&msg);
1945 return;
1946 }
1947 p2p_parse_free(&msg);
1948
1949 if (!p2p->cfg->send_probe_resp)
1950 return; /* Response generated elsewhere */
1951
1952 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1953 "P2P: Reply to P2P Probe Request in Listen state");
1954
1955 /*
1956 * We do not really have a specific BSS that this frame is advertising,
1957 * so build a frame that has some information in valid format. This is
1958 * really only used for discovery purposes, not to learn exact BSS
1959 * parameters.
1960 */
1961 ies = p2p_build_probe_resp_ies(p2p);
1962 if (ies == NULL)
1963 return;
1964
1965 buf = wpabuf_alloc(200 + wpabuf_len(ies));
1966 if (buf == NULL) {
1967 wpabuf_free(ies);
1968 return;
1969 }
1970
1971 resp = NULL;
1972 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
1973
1974 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
1975 (WLAN_FC_STYPE_PROBE_RESP << 4));
1976 os_memcpy(resp->da, addr, ETH_ALEN);
1977 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
1978 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
1979 resp->u.probe_resp.beacon_int = host_to_le16(100);
1980 /* hardware or low-level driver will setup seq_ctrl and timestamp */
1981 resp->u.probe_resp.capab_info =
1982 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
1983 WLAN_CAPABILITY_PRIVACY |
1984 WLAN_CAPABILITY_SHORT_SLOT_TIME);
1985
1986 wpabuf_put_u8(buf, WLAN_EID_SSID);
1987 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
1988 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1989
1990 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
1991 wpabuf_put_u8(buf, 8);
1992 wpabuf_put_u8(buf, (60 / 5) | 0x80);
1993 wpabuf_put_u8(buf, 90 / 5);
1994 wpabuf_put_u8(buf, (120 / 5) | 0x80);
1995 wpabuf_put_u8(buf, 180 / 5);
1996 wpabuf_put_u8(buf, (240 / 5) | 0x80);
1997 wpabuf_put_u8(buf, 360 / 5);
1998 wpabuf_put_u8(buf, 480 / 5);
1999 wpabuf_put_u8(buf, 540 / 5);
2000
2001 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2002 wpabuf_put_u8(buf, 1);
2003 wpabuf_put_u8(buf, p2p->cfg->channel);
2004
2005 wpabuf_put_buf(buf, ies);
2006 wpabuf_free(ies);
2007
2008 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2009
2010 wpabuf_free(buf);
2011 }
2012
2013
p2p_probe_req_rx(struct p2p_data * p2p,const u8 * addr,const u8 * dst,const u8 * bssid,const u8 * ie,size_t ie_len)2014 int p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2015 const u8 *bssid, const u8 *ie, size_t ie_len)
2016 {
2017 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2018
2019 p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2020
2021 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2022 p2p->go_neg_peer &&
2023 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2024 == 0) {
2025 /* Received a Probe Request from GO Negotiation peer */
2026 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2027 "P2P: Found GO Negotiation peer - try to start GO "
2028 "negotiation from timeout");
2029 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2030 return 1;
2031 }
2032
2033 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2034 p2p->invite_peer &&
2035 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2036 == 0) {
2037 /* Received a Probe Request from Invite peer */
2038 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2039 "P2P: Found Invite peer - try to start Invite from "
2040 "timeout");
2041 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2042 return 1;
2043 }
2044
2045 return 0;
2046 }
2047
2048
p2p_assoc_req_ie_wlan_ap(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,struct wpabuf * p2p_ie)2049 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2050 u8 *buf, size_t len, struct wpabuf *p2p_ie)
2051 {
2052 struct wpabuf *tmp;
2053 u8 *lpos;
2054 size_t tmplen;
2055 int res;
2056 u8 group_capab;
2057
2058 if (p2p_ie == NULL)
2059 return 0; /* WLAN AP is not a P2P manager */
2060
2061 /*
2062 * (Re)Association Request - P2P IE
2063 * P2P Capability attribute (shall be present)
2064 * P2P Interface attribute (present if concurrent device and
2065 * P2P Management is enabled)
2066 */
2067 tmp = wpabuf_alloc(200);
2068 if (tmp == NULL)
2069 return -1;
2070
2071 lpos = p2p_buf_add_ie_hdr(tmp);
2072 group_capab = 0;
2073 if (p2p->num_groups > 0) {
2074 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2075 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2076 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2077 p2p->cross_connect)
2078 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2079 }
2080 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2081 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2082 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2083 p2p_buf_add_p2p_interface(tmp, p2p);
2084 p2p_buf_update_ie_hdr(tmp, lpos);
2085
2086 tmplen = wpabuf_len(tmp);
2087 if (tmplen > len)
2088 res = -1;
2089 else {
2090 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2091 res = tmplen;
2092 }
2093 wpabuf_free(tmp);
2094
2095 return res;
2096 }
2097
2098
p2p_assoc_req_ie(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,int p2p_group,struct wpabuf * p2p_ie)2099 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2100 size_t len, int p2p_group, struct wpabuf *p2p_ie)
2101 {
2102 struct wpabuf *tmp;
2103 u8 *lpos;
2104 struct p2p_device *peer;
2105 size_t tmplen;
2106 int res;
2107
2108 if (!p2p_group)
2109 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2110
2111 /*
2112 * (Re)Association Request - P2P IE
2113 * P2P Capability attribute (shall be present)
2114 * Extended Listen Timing (may be present)
2115 * P2P Device Info attribute (shall be present)
2116 */
2117 tmp = wpabuf_alloc(200);
2118 if (tmp == NULL)
2119 return -1;
2120
2121 peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2122
2123 lpos = p2p_buf_add_ie_hdr(tmp);
2124 p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2125 if (p2p->ext_listen_interval)
2126 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2127 p2p->ext_listen_interval);
2128 p2p_buf_add_device_info(tmp, p2p, peer);
2129 p2p_buf_update_ie_hdr(tmp, lpos);
2130
2131 tmplen = wpabuf_len(tmp);
2132 if (tmplen > len)
2133 res = -1;
2134 else {
2135 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2136 res = tmplen;
2137 }
2138 wpabuf_free(tmp);
2139
2140 return res;
2141 }
2142
2143
p2p_scan_result_text(const u8 * ies,size_t ies_len,char * buf,char * end)2144 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2145 {
2146 struct wpabuf *p2p_ie;
2147 int ret;
2148
2149 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2150 if (p2p_ie == NULL)
2151 return 0;
2152
2153 ret = p2p_attr_text(p2p_ie, buf, end);
2154 wpabuf_free(p2p_ie);
2155 return ret;
2156 }
2157
2158
p2p_parse_dev_addr(const u8 * ies,size_t ies_len,u8 * dev_addr)2159 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2160 {
2161 struct wpabuf *p2p_ie;
2162 struct p2p_message msg;
2163
2164 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2165 P2P_IE_VENDOR_TYPE);
2166 if (p2p_ie == NULL)
2167 return -1;
2168 os_memset(&msg, 0, sizeof(msg));
2169 if (p2p_parse_p2p_ie(p2p_ie, &msg)) {
2170 wpabuf_free(p2p_ie);
2171 return -1;
2172 }
2173
2174 if (msg.p2p_device_addr == NULL) {
2175 wpabuf_free(p2p_ie);
2176 return -1;
2177 }
2178
2179 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2180 wpabuf_free(p2p_ie);
2181 return 0;
2182 }
2183
2184
p2p_clear_go_neg(struct p2p_data * p2p)2185 static void p2p_clear_go_neg(struct p2p_data *p2p)
2186 {
2187 p2p->go_neg_peer = NULL;
2188 p2p_clear_timeout(p2p);
2189 p2p_set_state(p2p, P2P_IDLE);
2190 }
2191
2192
p2p_wps_success_cb(struct p2p_data * p2p,const u8 * mac_addr)2193 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2194 {
2195 if (p2p->go_neg_peer == NULL) {
2196 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2197 "P2P: No pending Group Formation - "
2198 "ignore WPS registration success notification");
2199 return; /* No pending Group Formation */
2200 }
2201
2202 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2203 0) {
2204 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2205 "P2P: Ignore WPS registration success notification "
2206 "for " MACSTR " (GO Negotiation peer " MACSTR ")",
2207 MAC2STR(mac_addr),
2208 MAC2STR(p2p->go_neg_peer->intended_addr));
2209 return; /* Ignore unexpected peer address */
2210 }
2211
2212 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2213 "P2P: Group Formation completed successfully with " MACSTR,
2214 MAC2STR(mac_addr));
2215
2216 p2p_clear_go_neg(p2p);
2217 }
2218
2219
p2p_group_formation_failed(struct p2p_data * p2p)2220 void p2p_group_formation_failed(struct p2p_data *p2p)
2221 {
2222 if (p2p->go_neg_peer == NULL) {
2223 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2224 "P2P: No pending Group Formation - "
2225 "ignore group formation failure notification");
2226 return; /* No pending Group Formation */
2227 }
2228
2229 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2230 "P2P: Group Formation failed with " MACSTR,
2231 MAC2STR(p2p->go_neg_peer->intended_addr));
2232
2233 p2p_clear_go_neg(p2p);
2234 }
2235
2236
p2p_init(const struct p2p_config * cfg)2237 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2238 {
2239 struct p2p_data *p2p;
2240
2241 if (cfg->max_peers < 1)
2242 return NULL;
2243
2244 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2245 if (p2p == NULL)
2246 return NULL;
2247 p2p->cfg = (struct p2p_config *) (p2p + 1);
2248 os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2249 if (cfg->dev_name)
2250 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2251 if (cfg->manufacturer)
2252 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2253 if (cfg->model_name)
2254 p2p->cfg->model_name = os_strdup(cfg->model_name);
2255 if (cfg->model_number)
2256 p2p->cfg->model_number = os_strdup(cfg->model_number);
2257 if (cfg->serial_number)
2258 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2259 #ifdef ANDROID_P2P
2260 /* 100ms listen time is too less to receive the response frames in some scenarios
2261 * increasing min listen time to 200ms.
2262 */
2263 p2p->min_disc_int = 2;
2264 /* SD_FAIR_POLICY: Initializing the SD current serviced pointer to NULL */
2265 p2p->sd_dev_list = NULL;
2266 #else
2267 p2p->min_disc_int = 1;
2268 #endif
2269 p2p->max_disc_int = 3;
2270
2271 os_get_random(&p2p->next_tie_breaker, 1);
2272 p2p->next_tie_breaker &= 0x01;
2273 if (cfg->sd_request)
2274 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2275 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2276 if (cfg->concurrent_operations)
2277 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2278 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2279
2280 dl_list_init(&p2p->devices);
2281
2282 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2283 p2p_expiration_timeout, p2p, NULL);
2284
2285 return p2p;
2286 }
2287
2288
p2p_deinit(struct p2p_data * p2p)2289 void p2p_deinit(struct p2p_data *p2p)
2290 {
2291 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2292 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2293 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2294 p2p_flush(p2p);
2295 p2p_free_req_dev_types(p2p);
2296 os_free(p2p->cfg->dev_name);
2297 os_free(p2p->cfg->manufacturer);
2298 os_free(p2p->cfg->model_name);
2299 os_free(p2p->cfg->model_number);
2300 os_free(p2p->cfg->serial_number);
2301 os_free(p2p->groups);
2302 wpabuf_free(p2p->sd_resp);
2303 os_free(p2p->after_scan_tx);
2304 p2p_remove_wps_vendor_extensions(p2p);
2305 os_free(p2p);
2306 }
2307
2308
p2p_flush(struct p2p_data * p2p)2309 void p2p_flush(struct p2p_data *p2p)
2310 {
2311 struct p2p_device *dev, *prev;
2312 p2p_clear_timeout(p2p);
2313 #ifdef ANDROID_P2P
2314 if (p2p->state == P2P_SEARCH)
2315 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO,
2316 P2P_EVENT_FIND_STOPPED);
2317 #endif
2318 p2p_set_state(p2p, P2P_IDLE);
2319 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
2320 p2p->go_neg_peer = NULL;
2321 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
2322 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2323 list) {
2324 dl_list_del(&dev->list);
2325 p2p_device_free(p2p, dev);
2326 }
2327 #ifdef ANDROID_P2P
2328 /* SD_FAIR_POLICY: Initializing the SD current serviced pointer to NULL */
2329 p2p->sd_dev_list = NULL;
2330 #endif
2331 p2p_free_sd_queries(p2p);
2332 os_free(p2p->after_scan_tx);
2333 p2p->after_scan_tx = NULL;
2334 }
2335
2336
p2p_unauthorize(struct p2p_data * p2p,const u8 * addr)2337 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2338 {
2339 struct p2p_device *dev;
2340
2341 dev = p2p_get_device(p2p, addr);
2342 if (dev == NULL)
2343 return -1;
2344
2345 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Unauthorizing " MACSTR,
2346 MAC2STR(addr));
2347
2348 if (p2p->go_neg_peer == dev)
2349 p2p->go_neg_peer = NULL;
2350
2351 dev->wps_method = WPS_NOT_READY;
2352 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2353 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2354
2355 /* Check if after_scan_tx is for this peer. If so free it */
2356 if (p2p->after_scan_tx &&
2357 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2358 os_free(p2p->after_scan_tx);
2359 p2p->after_scan_tx = NULL;
2360 }
2361
2362 return 0;
2363 }
2364
2365
p2p_set_dev_name(struct p2p_data * p2p,const char * dev_name)2366 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2367 {
2368 os_free(p2p->cfg->dev_name);
2369 if (dev_name) {
2370 p2p->cfg->dev_name = os_strdup(dev_name);
2371 if (p2p->cfg->dev_name == NULL)
2372 return -1;
2373 } else
2374 p2p->cfg->dev_name = NULL;
2375 return 0;
2376 }
2377
2378
p2p_set_manufacturer(struct p2p_data * p2p,const char * manufacturer)2379 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2380 {
2381 os_free(p2p->cfg->manufacturer);
2382 p2p->cfg->manufacturer = NULL;
2383 if (manufacturer) {
2384 p2p->cfg->manufacturer = os_strdup(manufacturer);
2385 if (p2p->cfg->manufacturer == NULL)
2386 return -1;
2387 }
2388
2389 return 0;
2390 }
2391
2392
p2p_set_model_name(struct p2p_data * p2p,const char * model_name)2393 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2394 {
2395 os_free(p2p->cfg->model_name);
2396 p2p->cfg->model_name = NULL;
2397 if (model_name) {
2398 p2p->cfg->model_name = os_strdup(model_name);
2399 if (p2p->cfg->model_name == NULL)
2400 return -1;
2401 }
2402
2403 return 0;
2404 }
2405
2406
p2p_set_model_number(struct p2p_data * p2p,const char * model_number)2407 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2408 {
2409 os_free(p2p->cfg->model_number);
2410 p2p->cfg->model_number = NULL;
2411 if (model_number) {
2412 p2p->cfg->model_number = os_strdup(model_number);
2413 if (p2p->cfg->model_number == NULL)
2414 return -1;
2415 }
2416
2417 return 0;
2418 }
2419
2420
p2p_set_serial_number(struct p2p_data * p2p,const char * serial_number)2421 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2422 {
2423 os_free(p2p->cfg->serial_number);
2424 p2p->cfg->serial_number = NULL;
2425 if (serial_number) {
2426 p2p->cfg->serial_number = os_strdup(serial_number);
2427 if (p2p->cfg->serial_number == NULL)
2428 return -1;
2429 }
2430
2431 return 0;
2432 }
2433
2434
p2p_set_config_methods(struct p2p_data * p2p,u16 config_methods)2435 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2436 {
2437 p2p->cfg->config_methods = config_methods;
2438 }
2439
2440
p2p_set_uuid(struct p2p_data * p2p,const u8 * uuid)2441 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2442 {
2443 os_memcpy(p2p->cfg->uuid, uuid, 16);
2444 }
2445
2446
p2p_set_pri_dev_type(struct p2p_data * p2p,const u8 * pri_dev_type)2447 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2448 {
2449 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2450 return 0;
2451 }
2452
2453
p2p_set_sec_dev_types(struct p2p_data * p2p,const u8 dev_types[][8],size_t num_dev_types)2454 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2455 size_t num_dev_types)
2456 {
2457 if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2458 num_dev_types = P2P_SEC_DEVICE_TYPES;
2459 p2p->cfg->num_sec_dev_types = num_dev_types;
2460 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2461 return 0;
2462 }
2463
2464
p2p_remove_wps_vendor_extensions(struct p2p_data * p2p)2465 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2466 {
2467 int i;
2468
2469 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2470 wpabuf_free(p2p->wps_vendor_ext[i]);
2471 p2p->wps_vendor_ext[i] = NULL;
2472 }
2473 }
2474
2475
p2p_add_wps_vendor_extension(struct p2p_data * p2p,const struct wpabuf * vendor_ext)2476 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2477 const struct wpabuf *vendor_ext)
2478 {
2479 int i;
2480
2481 if (vendor_ext == NULL)
2482 return -1;
2483
2484 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2485 if (p2p->wps_vendor_ext[i] == NULL)
2486 break;
2487 }
2488 if (i >= P2P_MAX_WPS_VENDOR_EXT)
2489 return -1;
2490
2491 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2492 if (p2p->wps_vendor_ext[i] == NULL)
2493 return -1;
2494
2495 return 0;
2496 }
2497
2498
p2p_set_country(struct p2p_data * p2p,const char * country)2499 int p2p_set_country(struct p2p_data *p2p, const char *country)
2500 {
2501 os_memcpy(p2p->cfg->country, country, 3);
2502 return 0;
2503 }
2504
2505
p2p_continue_find(struct p2p_data * p2p)2506 void p2p_continue_find(struct p2p_data *p2p)
2507 {
2508 struct p2p_device *dev;
2509 #ifdef ANDROID_P2P
2510 int skip=1;
2511 #endif
2512 p2p_set_state(p2p, P2P_SEARCH);
2513 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2514 #ifdef ANDROID_P2P
2515 /* SD_FAIR_POLICY: We need to give chance to all devices in the device list
2516 * There may be a scenario, where a particular peer device have
2517 * not registered any query response. When we send a SD request to such device,
2518 * no response will be received. And if we continue to get probe responses from that device,
2519 * and if that device happens to be on top in our device list,
2520 * we will always continue to send SD requests always to that peer only.
2521 * We will not be able to send SD requests to other devices in that case.
2522 * This implementation keeps track of last serviced peer device.
2523 * And then takes the next one from the device list, in the next iteration.
2524 */
2525 if (p2p->sd_dev_list && p2p->sd_dev_list != &p2p->devices) {
2526 if(skip) {
2527 if ((&dev->list == p2p->sd_dev_list) ) {
2528 skip = 0;
2529 if (dev->list.next == &p2p->devices)
2530 p2p->sd_dev_list = NULL;
2531 }
2532 continue;
2533 }
2534 }
2535 p2p->sd_dev_list = &dev->list;
2536 wpa_printf(MSG_DEBUG, "P2P: ### Servicing %p dev->flags 0x%x SD schedule %s devaddr " MACSTR,
2537 p2p->sd_dev_list, dev->flags, dev->flags & P2P_DEV_SD_SCHEDULE ? "TRUE": "FALSE",
2538 MAC2STR(dev->info.p2p_device_addr));
2539 #endif
2540 if (dev->flags & P2P_DEV_SD_SCHEDULE) {
2541 if (p2p_start_sd(p2p, dev) == 0)
2542 return;
2543 else
2544 break;
2545 } else if (dev->req_config_methods &&
2546 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2547 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send "
2548 "pending Provision Discovery Request to "
2549 MACSTR " (config methods 0x%x)",
2550 MAC2STR(dev->info.p2p_device_addr),
2551 dev->req_config_methods);
2552 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2553 return;
2554 }
2555 }
2556
2557 p2p_listen_in_find(p2p);
2558 }
2559
2560
p2p_sd_cb(struct p2p_data * p2p,int success)2561 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2562 {
2563 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2564 "P2P: Service Discovery Query TX callback: success=%d",
2565 success);
2566 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2567
2568 if (!success) {
2569 if (p2p->sd_peer) {
2570 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
2571 p2p->sd_peer = NULL;
2572 }
2573 p2p_continue_find(p2p);
2574 return;
2575 }
2576
2577 if (p2p->sd_peer == NULL) {
2578 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2579 "P2P: No SD peer entry known");
2580 p2p_continue_find(p2p);
2581 return;
2582 }
2583
2584 /* Wait for response from the peer */
2585 p2p_set_state(p2p, P2P_SD_DURING_FIND);
2586 p2p_set_timeout(p2p, 0, 200000);
2587 }
2588
2589
2590 /**
2591 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2592 * @p2p: P2P module context from p2p_init()
2593 */
p2p_retry_pd(struct p2p_data * p2p)2594 static void p2p_retry_pd(struct p2p_data *p2p)
2595 {
2596 struct p2p_device *dev;
2597
2598 if (p2p->state != P2P_IDLE)
2599 return;
2600
2601 /*
2602 * Retry the prov disc req attempt only for the peer that the user had
2603 * requested for and provided a join has not been initiated on it
2604 * in the meantime.
2605 */
2606
2607 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2608 if (os_memcmp(p2p->pending_pd_devaddr,
2609 dev->info.p2p_device_addr, ETH_ALEN) != 0)
2610 continue;
2611 if (!dev->req_config_methods)
2612 continue;
2613 if (dev->flags & P2P_DEV_PD_FOR_JOIN)
2614 continue;
2615
2616 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send "
2617 "pending Provision Discovery Request to "
2618 MACSTR " (config methods 0x%x)",
2619 MAC2STR(dev->info.p2p_device_addr),
2620 dev->req_config_methods);
2621 p2p_send_prov_disc_req(p2p, dev, 0, 0);
2622 return;
2623 }
2624 }
2625
2626
p2p_prov_disc_cb(struct p2p_data * p2p,int success)2627 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2628 {
2629 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2630 "P2P: Provision Discovery Request TX callback: success=%d",
2631 success);
2632
2633 /*
2634 * Postpone resetting the pending action state till after we actually
2635 * time out. This allows us to take some action like notifying any
2636 * interested parties about no response to the request.
2637 *
2638 * When the timer (below) goes off we check in IDLE, SEARCH, or
2639 * LISTEN_ONLY state, which are the only allowed states to issue a PD
2640 * requests in, if this was still pending and then raise notification.
2641 */
2642
2643 if (!success) {
2644 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2645
2646 if (p2p->state != P2P_IDLE)
2647 p2p_continue_find(p2p);
2648 else if (p2p->user_initiated_pd) {
2649 p2p->pending_action_state = P2P_PENDING_PD;
2650 p2p_set_timeout(p2p, 0, 300000);
2651 }
2652 return;
2653 }
2654
2655 /*
2656 * This postponing, of resetting pending_action_state, needs to be
2657 * done only for user initiated PD requests and not internal ones.
2658 */
2659 if (p2p->user_initiated_pd)
2660 p2p->pending_action_state = P2P_PENDING_PD;
2661 else
2662 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2663
2664 /* Wait for response from the peer */
2665 if (p2p->state == P2P_SEARCH)
2666 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2667 p2p_set_timeout(p2p, 0, 200000);
2668 }
2669
2670
p2p_scan_res_handler(struct p2p_data * p2p,const u8 * bssid,int freq,int level,const u8 * ies,size_t ies_len)2671 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2672 int level, const u8 *ies, size_t ies_len)
2673 {
2674 p2p_add_device(p2p, bssid, freq, level, ies, ies_len);
2675
2676 if (p2p->go_neg_peer && p2p->state == P2P_SEARCH &&
2677 os_memcmp(p2p->go_neg_peer->info.p2p_device_addr, bssid, ETH_ALEN)
2678 == 0) {
2679 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2680 "P2P: Found GO Negotiation peer - try to start GO "
2681 "negotiation");
2682 p2p_connect_send(p2p, p2p->go_neg_peer);
2683 return 1;
2684 }
2685
2686 return 0;
2687 }
2688
2689
p2p_scan_res_handled(struct p2p_data * p2p)2690 void p2p_scan_res_handled(struct p2p_data *p2p)
2691 {
2692 if (!p2p->p2p_scan_running) {
2693 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan was not "
2694 "running, but scan results received");
2695 }
2696 p2p->p2p_scan_running = 0;
2697 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2698
2699 if (p2p_run_after_scan(p2p))
2700 return;
2701 if (p2p->state == P2P_SEARCH)
2702 p2p_continue_find(p2p);
2703 }
2704
2705
p2p_scan_ie(struct p2p_data * p2p,struct wpabuf * ies,const u8 * dev_id)2706 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2707 {
2708 u8 *len = p2p_buf_add_ie_hdr(ies);
2709 p2p_buf_add_capability(ies, p2p->dev_capab, 0);
2710 if (dev_id)
2711 p2p_buf_add_device_id(ies, dev_id);
2712 if (p2p->cfg->reg_class && p2p->cfg->channel)
2713 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
2714 p2p->cfg->reg_class,
2715 p2p->cfg->channel);
2716 if (p2p->ext_listen_interval)
2717 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
2718 p2p->ext_listen_interval);
2719 /* TODO: p2p_buf_add_operating_channel() if GO */
2720 p2p_buf_update_ie_hdr(ies, len);
2721 }
2722
2723
p2p_scan_ie_buf_len(struct p2p_data * p2p)2724 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
2725 {
2726 return 100;
2727 }
2728
2729
p2p_ie_text(struct wpabuf * p2p_ie,char * buf,char * end)2730 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
2731 {
2732 return p2p_attr_text(p2p_ie, buf, end);
2733 }
2734
2735
p2p_go_neg_req_cb(struct p2p_data * p2p,int success)2736 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
2737 {
2738 struct p2p_device *dev = p2p->go_neg_peer;
2739
2740 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2741 "P2P: GO Negotiation Request TX callback: success=%d",
2742 success);
2743
2744 if (dev == NULL) {
2745 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2746 "P2P: No pending GO Negotiation");
2747 return;
2748 }
2749
2750 if (success) {
2751 #ifndef ANDROID_P2P
2752 dev->go_neg_req_sent++;
2753 #endif
2754 if (dev->flags & P2P_DEV_USER_REJECTED) {
2755 p2p_set_state(p2p, P2P_IDLE);
2756 return;
2757 }
2758 }
2759 #ifdef ANDROID_P2P
2760 else {
2761 dev->go_neg_req_sent--;
2762 }
2763 #endif
2764
2765 if (!success &&
2766 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
2767 !is_zero_ether_addr(dev->member_in_go_dev)) {
2768 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2769 "P2P: Peer " MACSTR " did not acknowledge request - "
2770 "try to use device discoverability through its GO",
2771 MAC2STR(dev->info.p2p_device_addr));
2772 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2773 p2p_send_dev_disc_req(p2p, dev);
2774 return;
2775 }
2776
2777 /*
2778 * Use P2P find, if needed, to find the other device from its listen
2779 * channel.
2780 */
2781 p2p_set_state(p2p, P2P_CONNECT);
2782 p2p_set_timeout(p2p, 0, 100000);
2783 }
2784
2785
p2p_go_neg_resp_cb(struct p2p_data * p2p,int success)2786 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
2787 {
2788 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2789 "P2P: GO Negotiation Response TX callback: success=%d",
2790 success);
2791 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
2792 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2793 "P2P: Ignore TX callback event - GO Negotiation is "
2794 "not running anymore");
2795 return;
2796 }
2797 p2p_set_state(p2p, P2P_CONNECT);
2798 p2p_set_timeout(p2p, 0, 100000);
2799 }
2800
2801
p2p_go_neg_resp_failure_cb(struct p2p_data * p2p,int success)2802 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success)
2803 {
2804 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2805 "P2P: GO Negotiation Response (failure) TX callback: "
2806 "success=%d", success);
2807 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
2808 p2p_go_neg_failed(p2p, p2p->go_neg_peer,
2809 p2p->go_neg_peer->status);
2810 }
2811 }
2812
2813
p2p_go_neg_conf_cb(struct p2p_data * p2p,enum p2p_send_action_result result)2814 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
2815 enum p2p_send_action_result result)
2816 {
2817 struct p2p_device *dev;
2818
2819 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2820 "P2P: GO Negotiation Confirm TX callback: result=%d",
2821 result);
2822 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2823 if (result == P2P_SEND_ACTION_FAILED) {
2824 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
2825 return;
2826 }
2827 if (result == P2P_SEND_ACTION_NO_ACK) {
2828 /*
2829 * It looks like the TX status for GO Negotiation Confirm is
2830 * often showing failure even when the peer has actually
2831 * received the frame. Since the peer may change channels
2832 * immediately after having received the frame, we may not see
2833 * an Ack for retries, so just dropping a single frame may
2834 * trigger this. To allow the group formation to succeed if the
2835 * peer did indeed receive the frame, continue regardless of
2836 * the TX status.
2837 */
2838 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2839 "P2P: Assume GO Negotiation Confirm TX was actually "
2840 "received by the peer even though Ack was not "
2841 "reported");
2842 }
2843
2844 dev = p2p->go_neg_peer;
2845 if (dev == NULL)
2846 return;
2847
2848 p2p_go_complete(p2p, dev);
2849 }
2850
2851
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)2852 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
2853 const u8 *src, const u8 *bssid,
2854 enum p2p_send_action_result result)
2855 {
2856 enum p2p_pending_action_state state;
2857 int success;
2858
2859 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2860 "P2P: Action frame TX callback (state=%d freq=%u dst=" MACSTR
2861 " src=" MACSTR " bssid=" MACSTR " result=%d",
2862 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
2863 MAC2STR(bssid), result);
2864 success = result == P2P_SEND_ACTION_SUCCESS;
2865 state = p2p->pending_action_state;
2866 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2867 switch (state) {
2868 case P2P_NO_PENDING_ACTION:
2869 break;
2870 case P2P_PENDING_GO_NEG_REQUEST:
2871 p2p_go_neg_req_cb(p2p, success);
2872 break;
2873 case P2P_PENDING_GO_NEG_RESPONSE:
2874 p2p_go_neg_resp_cb(p2p, success);
2875 break;
2876 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
2877 p2p_go_neg_resp_failure_cb(p2p, success);
2878 break;
2879 case P2P_PENDING_GO_NEG_CONFIRM:
2880 p2p_go_neg_conf_cb(p2p, result);
2881 break;
2882 case P2P_PENDING_SD:
2883 p2p_sd_cb(p2p, success);
2884 break;
2885 case P2P_PENDING_PD:
2886 p2p_prov_disc_cb(p2p, success);
2887 break;
2888 case P2P_PENDING_INVITATION_REQUEST:
2889 p2p_invitation_req_cb(p2p, success);
2890 break;
2891 case P2P_PENDING_INVITATION_RESPONSE:
2892 p2p_invitation_resp_cb(p2p, success);
2893 break;
2894 case P2P_PENDING_DEV_DISC_REQUEST:
2895 p2p_dev_disc_req_cb(p2p, success);
2896 break;
2897 case P2P_PENDING_DEV_DISC_RESPONSE:
2898 p2p_dev_disc_resp_cb(p2p, success);
2899 break;
2900 case P2P_PENDING_GO_DISC_REQ:
2901 p2p_go_disc_req_cb(p2p, success);
2902 break;
2903 }
2904 }
2905
2906
p2p_listen_cb(struct p2p_data * p2p,unsigned int freq,unsigned int duration)2907 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
2908 unsigned int duration)
2909 {
2910 if (freq == p2p->pending_client_disc_freq) {
2911 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2912 "P2P: Client discoverability remain-awake completed");
2913 p2p->pending_client_disc_freq = 0;
2914 return;
2915 }
2916
2917 if (freq != p2p->pending_listen_freq) {
2918 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2919 "P2P: Unexpected listen callback for freq=%u "
2920 "duration=%u (pending_listen_freq=%u)",
2921 freq, duration, p2p->pending_listen_freq);
2922 return;
2923 }
2924
2925 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2926 "P2P: Starting Listen timeout(%u,%u) on freq=%u based on "
2927 "callback",
2928 p2p->pending_listen_sec, p2p->pending_listen_usec,
2929 p2p->pending_listen_freq);
2930 p2p->in_listen = 1;
2931 p2p->drv_in_listen = freq;
2932 if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
2933 /*
2934 * Add 20 msec extra wait to avoid race condition with driver
2935 * remain-on-channel end event, i.e., give driver more time to
2936 * complete the operation before our timeout expires.
2937 */
2938 p2p_set_timeout(p2p, p2p->pending_listen_sec,
2939 p2p->pending_listen_usec + 20000);
2940 }
2941
2942 p2p->pending_listen_freq = 0;
2943 }
2944
2945
p2p_listen_end(struct p2p_data * p2p,unsigned int freq)2946 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
2947 {
2948 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver ended Listen "
2949 "state (freq=%u)", freq);
2950 p2p->drv_in_listen = 0;
2951 if (p2p->in_listen)
2952 return 0; /* Internal timeout will trigger the next step */
2953
2954 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
2955 if (p2p->go_neg_peer->connect_reqs >= 120) {
2956 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
2957 "P2P: Timeout on sending GO Negotiation "
2958 "Request without getting response");
2959 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
2960 return 0;
2961 }
2962
2963 p2p_set_state(p2p, P2P_CONNECT);
2964 p2p_connect_send(p2p, p2p->go_neg_peer);
2965 return 1;
2966 } else if (p2p->state == P2P_SEARCH) {
2967 if (p2p->p2p_scan_running) {
2968 /*
2969 * Search is already in progress. This can happen if
2970 * an Action frame RX is reported immediately after
2971 * the end of a remain-on-channel operation and the
2972 * response frame to that is sent using an offchannel
2973 * operation while in p2p_find. Avoid an attempt to
2974 * restart a scan here.
2975 */
2976 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan "
2977 "already in progress - do not try to start a "
2978 "new one");
2979 return 1;
2980 }
2981 p2p_search(p2p);
2982 return 1;
2983 }
2984
2985 return 0;
2986 }
2987
2988
p2p_timeout_connect(struct p2p_data * p2p)2989 static void p2p_timeout_connect(struct p2p_data *p2p)
2990 {
2991 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2992 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
2993 p2p_listen_in_find(p2p);
2994 }
2995
2996
p2p_timeout_connect_listen(struct p2p_data * p2p)2997 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
2998 {
2999 if (p2p->go_neg_peer) {
3000 if (p2p->drv_in_listen) {
3001 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver is "
3002 "still in Listen state; wait for it to "
3003 "complete");
3004 return;
3005 }
3006
3007 if (p2p->go_neg_peer->connect_reqs >= 120) {
3008 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3009 "P2P: Timeout on sending GO Negotiation "
3010 "Request without getting response");
3011 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3012 return;
3013 }
3014
3015 p2p_set_state(p2p, P2P_CONNECT);
3016 p2p_connect_send(p2p, p2p->go_neg_peer);
3017 } else
3018 p2p_set_state(p2p, P2P_IDLE);
3019 }
3020
3021
p2p_timeout_wait_peer_connect(struct p2p_data * p2p)3022 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3023 {
3024 /*
3025 * TODO: could remain constantly in Listen state for some time if there
3026 * are no other concurrent uses for the radio. For now, go to listen
3027 * state once per second to give other uses a chance to use the radio.
3028 */
3029 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3030 p2p_set_timeout(p2p, 0, 500000);
3031 }
3032
3033
p2p_timeout_wait_peer_idle(struct p2p_data * p2p)3034 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3035 {
3036 struct p2p_device *dev = p2p->go_neg_peer;
3037
3038 if (dev == NULL) {
3039 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3040 "P2P: Unknown GO Neg peer - stop GO Neg wait");
3041 return;
3042 }
3043
3044 dev->wait_count++;
3045 if (dev->wait_count >= 120) {
3046 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3047 "P2P: Timeout on waiting peer to become ready for GO "
3048 "Negotiation");
3049 p2p_go_neg_failed(p2p, dev, -1);
3050 return;
3051 }
3052
3053 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3054 "P2P: Go to Listen state while waiting for the peer to become "
3055 "ready for GO Negotiation");
3056 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3057 p2p_listen_in_find(p2p);
3058 }
3059
3060
p2p_timeout_sd_during_find(struct p2p_data * p2p)3061 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3062 {
3063 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3064 "P2P: Service Discovery Query timeout");
3065 if (p2p->sd_peer) {
3066 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3067 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
3068 p2p->sd_peer = NULL;
3069 }
3070 p2p_continue_find(p2p);
3071 }
3072
3073
p2p_timeout_prov_disc_during_find(struct p2p_data * p2p)3074 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3075 {
3076 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3077 "P2P: Provision Discovery Request timeout");
3078 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3079 p2p_continue_find(p2p);
3080 }
3081
3082
p2p_timeout_prov_disc_req(struct p2p_data * p2p)3083 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3084 {
3085 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3086
3087 /*
3088 * For user initiated PD requests that we have not gotten any responses
3089 * for while in IDLE state, we retry them a couple of times before
3090 * giving up.
3091 */
3092 if (!p2p->user_initiated_pd)
3093 return;
3094
3095 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3096 "P2P: User initiated Provision Discovery Request timeout");
3097
3098 if (p2p->pd_retries) {
3099 p2p->pd_retries--;
3100 p2p_retry_pd(p2p);
3101 } else {
3102 if (p2p->cfg->prov_disc_fail)
3103 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3104 p2p->pending_pd_devaddr,
3105 P2P_PROV_DISC_TIMEOUT);
3106 p2p_reset_pending_pd(p2p);
3107 }
3108 }
3109
3110
p2p_timeout_invite(struct p2p_data * p2p)3111 static void p2p_timeout_invite(struct p2p_data *p2p)
3112 {
3113 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3114 p2p_set_state(p2p, P2P_INVITE_LISTEN);
3115 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3116 /*
3117 * Better remain on operating channel instead of listen channel
3118 * when running a group.
3119 */
3120 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Inviting in "
3121 "active GO role - wait on operating channel");
3122 p2p_set_timeout(p2p, 0, 100000);
3123 return;
3124 }
3125 p2p_listen_in_find(p2p);
3126 }
3127
3128
p2p_timeout_invite_listen(struct p2p_data * p2p)3129 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3130 {
3131 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3132 p2p_set_state(p2p, P2P_INVITE);
3133 p2p_invite_send(p2p, p2p->invite_peer,
3134 p2p->invite_go_dev_addr);
3135 } else {
3136 if (p2p->invite_peer) {
3137 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3138 "P2P: Invitation Request retry limit reached");
3139 if (p2p->cfg->invitation_result)
3140 p2p->cfg->invitation_result(
3141 p2p->cfg->cb_ctx, -1, NULL);
3142 }
3143 p2p_set_state(p2p, P2P_IDLE);
3144 }
3145 }
3146
3147
p2p_state_timeout(void * eloop_ctx,void * timeout_ctx)3148 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3149 {
3150 struct p2p_data *p2p = eloop_ctx;
3151
3152 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Timeout (state=%s)",
3153 p2p_state_txt(p2p->state));
3154
3155 p2p->in_listen = 0;
3156
3157 switch (p2p->state) {
3158 case P2P_IDLE:
3159 /* Check if we timed out waiting for PD req */
3160 if (p2p->pending_action_state == P2P_PENDING_PD)
3161 p2p_timeout_prov_disc_req(p2p);
3162 break;
3163 case P2P_SEARCH:
3164 /* Check if we timed out waiting for PD req */
3165 if (p2p->pending_action_state == P2P_PENDING_PD)
3166 p2p_timeout_prov_disc_req(p2p);
3167 p2p_search(p2p);
3168 break;
3169 case P2P_CONNECT:
3170 p2p_timeout_connect(p2p);
3171 break;
3172 case P2P_CONNECT_LISTEN:
3173 p2p_timeout_connect_listen(p2p);
3174 break;
3175 case P2P_GO_NEG:
3176 break;
3177 case P2P_LISTEN_ONLY:
3178 /* Check if we timed out waiting for PD req */
3179 if (p2p->pending_action_state == P2P_PENDING_PD)
3180 p2p_timeout_prov_disc_req(p2p);
3181
3182 if (p2p->ext_listen_only) {
3183 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3184 "P2P: Extended Listen Timing - Listen State "
3185 "completed");
3186 p2p->ext_listen_only = 0;
3187 p2p_set_state(p2p, P2P_IDLE);
3188 }
3189 break;
3190 case P2P_WAIT_PEER_CONNECT:
3191 p2p_timeout_wait_peer_connect(p2p);
3192 break;
3193 case P2P_WAIT_PEER_IDLE:
3194 p2p_timeout_wait_peer_idle(p2p);
3195 break;
3196 case P2P_SD_DURING_FIND:
3197 p2p_timeout_sd_during_find(p2p);
3198 break;
3199 case P2P_PROVISIONING:
3200 break;
3201 case P2P_PD_DURING_FIND:
3202 p2p_timeout_prov_disc_during_find(p2p);
3203 break;
3204 case P2P_INVITE:
3205 p2p_timeout_invite(p2p);
3206 break;
3207 case P2P_INVITE_LISTEN:
3208 p2p_timeout_invite_listen(p2p);
3209 break;
3210 case P2P_SEARCH_WHEN_READY:
3211 break;
3212 }
3213 }
3214
3215
p2p_reject(struct p2p_data * p2p,const u8 * peer_addr)3216 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3217 {
3218 struct p2p_device *dev;
3219
3220 dev = p2p_get_device(p2p, peer_addr);
3221 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Local request to reject "
3222 "connection attempts by peer " MACSTR, MAC2STR(peer_addr));
3223 if (dev == NULL) {
3224 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR
3225 " unknown", MAC2STR(peer_addr));
3226 return -1;
3227 }
3228 dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3229 dev->flags |= P2P_DEV_USER_REJECTED;
3230 return 0;
3231 }
3232
3233
p2p_wps_method_text(enum p2p_wps_method method)3234 const char * p2p_wps_method_text(enum p2p_wps_method method)
3235 {
3236 switch (method) {
3237 case WPS_NOT_READY:
3238 return "not-ready";
3239 case WPS_PIN_DISPLAY:
3240 return "Display";
3241 case WPS_PIN_KEYPAD:
3242 return "Keypad";
3243 case WPS_PBC:
3244 return "PBC";
3245 }
3246
3247 return "??";
3248 }
3249
3250
p2p_go_state_text(enum p2p_go_state go_state)3251 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3252 {
3253 switch (go_state) {
3254 case UNKNOWN_GO:
3255 return "unknown";
3256 case LOCAL_GO:
3257 return "local";
3258 case REMOTE_GO:
3259 return "remote";
3260 }
3261
3262 return "??";
3263 }
3264
3265
p2p_get_peer_info(struct p2p_data * p2p,const u8 * addr,int next)3266 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3267 const u8 *addr, int next)
3268 {
3269 struct p2p_device *dev;
3270
3271 if (addr)
3272 dev = p2p_get_device(p2p, addr);
3273 else
3274 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3275
3276 if (dev && next) {
3277 dev = dl_list_first(&dev->list, struct p2p_device, list);
3278 if (&dev->list == &p2p->devices)
3279 dev = NULL;
3280 }
3281
3282 if (dev == NULL)
3283 return NULL;
3284
3285 return &dev->info;
3286 }
3287
3288
p2p_get_peer_info_txt(const struct p2p_peer_info * info,char * buf,size_t buflen)3289 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3290 char *buf, size_t buflen)
3291 {
3292 struct p2p_device *dev;
3293 int res;
3294 char *pos, *end;
3295 struct os_time now;
3296
3297 if (info == NULL)
3298 return -1;
3299
3300 dev = (struct p2p_device *) (((u8 *) info) -
3301 offsetof(struct p2p_device, info));
3302
3303 pos = buf;
3304 end = buf + buflen;
3305
3306 os_get_time(&now);
3307 res = os_snprintf(pos, end - pos,
3308 "age=%d\n"
3309 "listen_freq=%d\n"
3310 "wps_method=%s\n"
3311 "interface_addr=" MACSTR "\n"
3312 "member_in_go_dev=" MACSTR "\n"
3313 "member_in_go_iface=" MACSTR "\n"
3314 "go_neg_req_sent=%d\n"
3315 "go_state=%s\n"
3316 "dialog_token=%u\n"
3317 "intended_addr=" MACSTR "\n"
3318 "country=%c%c\n"
3319 "oper_freq=%d\n"
3320 "req_config_methods=0x%x\n"
3321 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3322 "status=%d\n"
3323 "wait_count=%u\n"
3324 "invitation_reqs=%u\n",
3325 (int) (now.sec - dev->last_seen.sec),
3326 dev->listen_freq,
3327 p2p_wps_method_text(dev->wps_method),
3328 MAC2STR(dev->interface_addr),
3329 MAC2STR(dev->member_in_go_dev),
3330 MAC2STR(dev->member_in_go_iface),
3331 dev->go_neg_req_sent,
3332 p2p_go_state_text(dev->go_state),
3333 dev->dialog_token,
3334 MAC2STR(dev->intended_addr),
3335 dev->country[0] ? dev->country[0] : '_',
3336 dev->country[1] ? dev->country[1] : '_',
3337 dev->oper_freq,
3338 dev->req_config_methods,
3339 dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3340 "[PROBE_REQ_ONLY]" : "",
3341 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3342 dev->flags & P2P_DEV_NOT_YET_READY ?
3343 "[NOT_YET_READY]" : "",
3344 dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "",
3345 dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" :
3346 "",
3347 dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3348 "[PD_PEER_DISPLAY]" : "",
3349 dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3350 "[PD_PEER_KEYPAD]" : "",
3351 dev->flags & P2P_DEV_USER_REJECTED ?
3352 "[USER_REJECTED]" : "",
3353 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3354 "[PEER_WAITING_RESPONSE]" : "",
3355 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3356 "[PREFER_PERSISTENT_GROUP]" : "",
3357 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3358 "[WAIT_GO_NEG_RESPONSE]" : "",
3359 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3360 "[WAIT_GO_NEG_CONFIRM]" : "",
3361 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3362 "[GROUP_CLIENT_ONLY]" : "",
3363 dev->flags & P2P_DEV_FORCE_FREQ ?
3364 "[FORCE_FREQ]" : "",
3365 dev->flags & P2P_DEV_PD_FOR_JOIN ?
3366 "[PD_FOR_JOIN]" : "",
3367 dev->status,
3368 dev->wait_count,
3369 dev->invitation_reqs);
3370 if (res < 0 || res >= end - pos)
3371 return pos - buf;
3372 pos += res;
3373
3374 if (dev->ext_listen_period) {
3375 res = os_snprintf(pos, end - pos,
3376 "ext_listen_period=%u\n"
3377 "ext_listen_interval=%u\n",
3378 dev->ext_listen_period,
3379 dev->ext_listen_interval);
3380 if (res < 0 || res >= end - pos)
3381 return pos - buf;
3382 pos += res;
3383 }
3384
3385 if (dev->oper_ssid_len) {
3386 res = os_snprintf(pos, end - pos,
3387 "oper_ssid=%s\n",
3388 wpa_ssid_txt(dev->oper_ssid,
3389 dev->oper_ssid_len));
3390 if (res < 0 || res >= end - pos)
3391 return pos - buf;
3392 pos += res;
3393 }
3394
3395 return pos - buf;
3396 }
3397
3398
p2p_peer_known(struct p2p_data * p2p,const u8 * addr)3399 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3400 {
3401 return p2p_get_device(p2p, addr) != NULL;
3402 }
3403
3404
p2p_set_client_discoverability(struct p2p_data * p2p,int enabled)3405 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3406 {
3407 if (enabled) {
3408 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Client "
3409 "discoverability enabled");
3410 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3411 } else {
3412 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Client "
3413 "discoverability disabled");
3414 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3415 }
3416 }
3417
3418
p2p_build_presence_req(u32 duration1,u32 interval1,u32 duration2,u32 interval2)3419 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3420 u32 duration2, u32 interval2)
3421 {
3422 struct wpabuf *req;
3423 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3424 u8 *len;
3425
3426 req = wpabuf_alloc(100);
3427 if (req == NULL)
3428 return NULL;
3429
3430 if (duration1 || interval1) {
3431 os_memset(&desc1, 0, sizeof(desc1));
3432 desc1.count_type = 1;
3433 desc1.duration = duration1;
3434 desc1.interval = interval1;
3435 ptr1 = &desc1;
3436
3437 if (duration2 || interval2) {
3438 os_memset(&desc2, 0, sizeof(desc2));
3439 desc2.count_type = 2;
3440 desc2.duration = duration2;
3441 desc2.interval = interval2;
3442 ptr2 = &desc2;
3443 }
3444 }
3445
3446 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3447 len = p2p_buf_add_ie_hdr(req);
3448 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3449 p2p_buf_update_ie_hdr(req, len);
3450
3451 return req;
3452 }
3453
3454
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)3455 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3456 const u8 *own_interface_addr, unsigned int freq,
3457 u32 duration1, u32 interval1, u32 duration2,
3458 u32 interval2)
3459 {
3460 struct wpabuf *req;
3461
3462 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send Presence Request to "
3463 "GO " MACSTR " (own interface " MACSTR ") freq=%u dur1=%u "
3464 "int1=%u dur2=%u int2=%u",
3465 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3466 freq, duration1, interval1, duration2, interval2);
3467
3468 req = p2p_build_presence_req(duration1, interval1, duration2,
3469 interval2);
3470 if (req == NULL)
3471 return -1;
3472
3473 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3474 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3475 go_interface_addr,
3476 wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3477 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3478 "P2P: Failed to send Action frame");
3479 }
3480 wpabuf_free(req);
3481
3482 return 0;
3483 }
3484
3485
p2p_build_presence_resp(u8 status,const u8 * noa,size_t noa_len,u8 dialog_token)3486 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3487 size_t noa_len, u8 dialog_token)
3488 {
3489 struct wpabuf *resp;
3490 u8 *len;
3491
3492 resp = wpabuf_alloc(100 + noa_len);
3493 if (resp == NULL)
3494 return NULL;
3495
3496 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3497 len = p2p_buf_add_ie_hdr(resp);
3498 p2p_buf_add_status(resp, status);
3499 if (noa) {
3500 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3501 wpabuf_put_le16(resp, noa_len);
3502 wpabuf_put_data(resp, noa, noa_len);
3503 } else
3504 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3505 p2p_buf_update_ie_hdr(resp, len);
3506
3507 return resp;
3508 }
3509
3510
p2p_process_presence_req(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len,int rx_freq)3511 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3512 const u8 *sa, const u8 *data, size_t len,
3513 int rx_freq)
3514 {
3515 struct p2p_message msg;
3516 u8 status;
3517 struct wpabuf *resp;
3518 size_t g;
3519 struct p2p_group *group = NULL;
3520 int parsed = 0;
3521 u8 noa[50];
3522 int noa_len;
3523
3524 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3525 "P2P: Received P2P Action - P2P Presence Request");
3526
3527 for (g = 0; g < p2p->num_groups; g++) {
3528 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3529 ETH_ALEN) == 0) {
3530 group = p2p->groups[g];
3531 break;
3532 }
3533 }
3534 if (group == NULL) {
3535 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3536 "P2P: Ignore P2P Presence Request for unknown group "
3537 MACSTR, MAC2STR(da));
3538 return;
3539 }
3540
3541 if (p2p_parse(data, len, &msg) < 0) {
3542 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3543 "P2P: Failed to parse P2P Presence Request");
3544 status = P2P_SC_FAIL_INVALID_PARAMS;
3545 goto fail;
3546 }
3547 parsed = 1;
3548
3549 if (msg.noa == NULL) {
3550 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3551 "P2P: No NoA attribute in P2P Presence Request");
3552 status = P2P_SC_FAIL_INVALID_PARAMS;
3553 goto fail;
3554 }
3555
3556 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3557
3558 fail:
3559 if (p2p->cfg->get_noa)
3560 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3561 sizeof(noa));
3562 else
3563 noa_len = -1;
3564 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3565 noa_len > 0 ? noa_len : 0,
3566 msg.dialog_token);
3567 if (parsed)
3568 p2p_parse_free(&msg);
3569 if (resp == NULL)
3570 return;
3571
3572 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3573 if (p2p_send_action(p2p, rx_freq, sa, da, da,
3574 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3575 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3576 "P2P: Failed to send Action frame");
3577 }
3578 wpabuf_free(resp);
3579 }
3580
3581
p2p_process_presence_resp(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len)3582 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3583 const u8 *sa, const u8 *data, size_t len)
3584 {
3585 struct p2p_message msg;
3586
3587 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3588 "P2P: Received P2P Action - P2P Presence Response");
3589
3590 if (p2p_parse(data, len, &msg) < 0) {
3591 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3592 "P2P: Failed to parse P2P Presence Response");
3593 return;
3594 }
3595
3596 if (msg.status == NULL || msg.noa == NULL) {
3597 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3598 "P2P: No Status or NoA attribute in P2P Presence "
3599 "Response");
3600 p2p_parse_free(&msg);
3601 return;
3602 }
3603
3604 if (*msg.status) {
3605 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3606 "P2P: P2P Presence Request was rejected: status %u",
3607 *msg.status);
3608 p2p_parse_free(&msg);
3609 return;
3610 }
3611
3612 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3613 "P2P: P2P Presence Request was accepted");
3614 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
3615 msg.noa, msg.noa_len);
3616 /* TODO: process NoA */
3617 p2p_parse_free(&msg);
3618 }
3619
3620
p2p_ext_listen_timeout(void * eloop_ctx,void * timeout_ctx)3621 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
3622 {
3623 struct p2p_data *p2p = eloop_ctx;
3624
3625 if (p2p->ext_listen_interval) {
3626 /* Schedule next extended listen timeout */
3627 eloop_register_timeout(p2p->ext_listen_interval_sec,
3628 p2p->ext_listen_interval_usec,
3629 p2p_ext_listen_timeout, p2p, NULL);
3630 }
3631
3632 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
3633 /*
3634 * This should not really happen, but it looks like the Listen
3635 * command may fail is something else (e.g., a scan) was
3636 * running at an inconvenient time. As a workaround, allow new
3637 * Extended Listen operation to be started.
3638 */
3639 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Previous "
3640 "Extended Listen operation had not been completed - "
3641 "try again");
3642 p2p->ext_listen_only = 0;
3643 p2p_set_state(p2p, P2P_IDLE);
3644 }
3645
3646 if (p2p->state != P2P_IDLE) {
3647 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Skip Extended "
3648 "Listen timeout in active state (%s)",
3649 p2p_state_txt(p2p->state));
3650 return;
3651 }
3652
3653 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Extended Listen timeout");
3654 p2p->ext_listen_only = 1;
3655 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
3656 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Failed to start "
3657 "Listen state for Extended Listen Timing");
3658 p2p->ext_listen_only = 0;
3659 }
3660 }
3661
3662
p2p_ext_listen(struct p2p_data * p2p,unsigned int period,unsigned int interval)3663 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
3664 unsigned int interval)
3665 {
3666 if (period > 65535 || interval > 65535 || period > interval ||
3667 (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
3668 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3669 "P2P: Invalid Extended Listen Timing request: "
3670 "period=%u interval=%u", period, interval);
3671 return -1;
3672 }
3673
3674 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
3675
3676 if (interval == 0) {
3677 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3678 "P2P: Disabling Extended Listen Timing");
3679 p2p->ext_listen_period = 0;
3680 p2p->ext_listen_interval = 0;
3681 return 0;
3682 }
3683
3684 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
3685 "P2P: Enabling Extended Listen Timing: period %u msec, "
3686 "interval %u msec", period, interval);
3687 p2p->ext_listen_period = period;
3688 p2p->ext_listen_interval = interval;
3689 p2p->ext_listen_interval_sec = interval / 1000;
3690 p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
3691
3692 eloop_register_timeout(p2p->ext_listen_interval_sec,
3693 p2p->ext_listen_interval_usec,
3694 p2p_ext_listen_timeout, p2p, NULL);
3695
3696 return 0;
3697 }
3698
3699
p2p_deauth_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)3700 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3701 const u8 *ie, size_t ie_len)
3702 {
3703 struct p2p_message msg;
3704
3705 if (bssid == NULL || ie == NULL)
3706 return;
3707
3708 os_memset(&msg, 0, sizeof(msg));
3709 if (p2p_parse_ies(ie, ie_len, &msg))
3710 return;
3711 if (msg.minor_reason_code == NULL)
3712 return;
3713
3714 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO,
3715 "P2P: Deauthentication notification BSSID " MACSTR
3716 " reason_code=%u minor_reason_code=%u",
3717 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3718
3719 p2p_parse_free(&msg);
3720 }
3721
3722
p2p_disassoc_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)3723 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
3724 const u8 *ie, size_t ie_len)
3725 {
3726 struct p2p_message msg;
3727
3728 if (bssid == NULL || ie == NULL)
3729 return;
3730
3731 os_memset(&msg, 0, sizeof(msg));
3732 if (p2p_parse_ies(ie, ie_len, &msg))
3733 return;
3734 if (msg.minor_reason_code == NULL)
3735 return;
3736
3737 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO,
3738 "P2P: Disassociation notification BSSID " MACSTR
3739 " reason_code=%u minor_reason_code=%u",
3740 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
3741
3742 p2p_parse_free(&msg);
3743 }
3744
3745
p2p_set_managed_oper(struct p2p_data * p2p,int enabled)3746 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
3747 {
3748 if (enabled) {
3749 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Managed P2P "
3750 "Device operations enabled");
3751 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
3752 } else {
3753 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Managed P2P "
3754 "Device operations disabled");
3755 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
3756 }
3757 }
3758
3759
p2p_set_listen_channel(struct p2p_data * p2p,u8 reg_class,u8 channel)3760 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel)
3761 {
3762 if (p2p_channel_to_freq(p2p->cfg->country, reg_class, channel) < 0)
3763 return -1;
3764
3765 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Set Listen channel: "
3766 "reg_class %u channel %u", reg_class, channel);
3767 p2p->cfg->reg_class = reg_class;
3768 p2p->cfg->channel = channel;
3769
3770 return 0;
3771 }
3772
3773
p2p_set_ssid_postfix(struct p2p_data * p2p,const u8 * postfix,size_t len)3774 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
3775 {
3776 wpa_hexdump_ascii(MSG_DEBUG, "P2P: New SSID postfix", postfix, len);
3777 if (postfix == NULL) {
3778 p2p->cfg->ssid_postfix_len = 0;
3779 return 0;
3780 }
3781 if (len > sizeof(p2p->cfg->ssid_postfix))
3782 return -1;
3783 os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
3784 p2p->cfg->ssid_postfix_len = len;
3785 return 0;
3786 }
3787
3788
p2p_set_oper_channel(struct p2p_data * p2p,u8 op_reg_class,u8 op_channel,int cfg_op_channel)3789 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
3790 int cfg_op_channel)
3791 {
3792 if (p2p_channel_to_freq(p2p->cfg->country, op_reg_class, op_channel)
3793 < 0)
3794 return -1;
3795
3796 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, "P2P: Set Operating channel: "
3797 "reg_class %u channel %u", op_reg_class, op_channel);
3798 p2p->cfg->op_reg_class = op_reg_class;
3799 p2p->cfg->op_channel = op_channel;
3800 p2p->cfg->cfg_op_channel = cfg_op_channel;
3801 return 0;
3802 }
3803
3804
p2p_get_interface_addr(struct p2p_data * p2p,const u8 * dev_addr,u8 * iface_addr)3805 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
3806 u8 *iface_addr)
3807 {
3808 struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
3809 if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
3810 return -1;
3811 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
3812 return 0;
3813 }
3814
3815
p2p_get_dev_addr(struct p2p_data * p2p,const u8 * iface_addr,u8 * dev_addr)3816 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
3817 u8 *dev_addr)
3818 {
3819 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
3820 if (dev == NULL)
3821 return -1;
3822 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
3823 return 0;
3824 }
3825
3826
p2p_set_peer_filter(struct p2p_data * p2p,const u8 * addr)3827 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
3828 {
3829 os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
3830 if (is_zero_ether_addr(p2p->peer_filter))
3831 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Disable peer "
3832 "filter");
3833 else
3834 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Enable peer "
3835 "filter for " MACSTR, MAC2STR(p2p->peer_filter));
3836 }
3837
3838
p2p_set_cross_connect(struct p2p_data * p2p,int enabled)3839 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
3840 {
3841 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Cross connection %s",
3842 enabled ? "enabled" : "disabled");
3843 if (p2p->cross_connect == enabled)
3844 return;
3845 p2p->cross_connect = enabled;
3846 /* TODO: may need to tear down any action group where we are GO(?) */
3847 }
3848
3849
p2p_get_oper_freq(struct p2p_data * p2p,const u8 * iface_addr)3850 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
3851 {
3852 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
3853 if (dev == NULL)
3854 return -1;
3855 if (dev->oper_freq <= 0)
3856 return -1;
3857 return dev->oper_freq;
3858 }
3859
3860
p2p_set_intra_bss_dist(struct p2p_data * p2p,int enabled)3861 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
3862 {
3863 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Intra BSS distribution %s",
3864 enabled ? "enabled" : "disabled");
3865 p2p->cfg->p2p_intra_bss = enabled;
3866 }
3867
3868
p2p_update_channel_list(struct p2p_data * p2p,struct p2p_channels * chan)3869 void p2p_update_channel_list(struct p2p_data *p2p, struct p2p_channels *chan)
3870 {
3871 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Update channel list");
3872 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
3873 }
3874
3875
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)3876 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3877 const u8 *src, const u8 *bssid, const u8 *buf,
3878 size_t len, unsigned int wait_time)
3879 {
3880 if (p2p->p2p_scan_running) {
3881 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Delay Action "
3882 "frame TX until p2p_scan completes");
3883 if (p2p->after_scan_tx) {
3884 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Dropped "
3885 "previous pending Action frame TX");
3886 os_free(p2p->after_scan_tx);
3887 }
3888 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
3889 len);
3890 if (p2p->after_scan_tx == NULL)
3891 return -1;
3892 p2p->after_scan_tx->freq = freq;
3893 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
3894 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
3895 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
3896 p2p->after_scan_tx->len = len;
3897 p2p->after_scan_tx->wait_time = wait_time;
3898 os_memcpy(p2p->after_scan_tx + 1, buf, len);
3899 return 0;
3900 }
3901
3902 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
3903 buf, len, wait_time);
3904 }
3905
3906
p2p_set_best_channels(struct p2p_data * p2p,int freq_24,int freq_5,int freq_overall)3907 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
3908 int freq_overall)
3909 {
3910 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Best channel: 2.4 GHz: %d,"
3911 " 5 GHz: %d, overall: %d", freq_24, freq_5, freq_overall);
3912 p2p->best_freq_24 = freq_24;
3913 p2p->best_freq_5 = freq_5;
3914 p2p->best_freq_overall = freq_overall;
3915 }
3916
3917
p2p_get_go_neg_peer(struct p2p_data * p2p)3918 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
3919 {
3920 if (p2p == NULL || p2p->go_neg_peer == NULL)
3921 return NULL;
3922 return p2p->go_neg_peer->info.p2p_device_addr;
3923 }
3924
3925
3926 const struct p2p_peer_info *
p2p_get_peer_found(struct p2p_data * p2p,const u8 * addr,int next)3927 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
3928 {
3929 struct p2p_device *dev;
3930
3931 if (addr) {
3932 dev = p2p_get_device(p2p, addr);
3933 if (!dev)
3934 return NULL;
3935
3936 if (!next) {
3937 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
3938 return NULL;
3939
3940 return &dev->info;
3941 } else {
3942 do {
3943 dev = dl_list_first(&dev->list,
3944 struct p2p_device,
3945 list);
3946 if (&dev->list == &p2p->devices)
3947 return NULL;
3948 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
3949 }
3950 } else {
3951 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3952 if (!dev)
3953 return NULL;
3954 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
3955 dev = dl_list_first(&dev->list,
3956 struct p2p_device,
3957 list);
3958 if (&dev->list == &p2p->devices)
3959 return NULL;
3960 }
3961 }
3962
3963 return &dev->info;
3964 }
3965
3966 #ifdef ANDROID_P2P
p2p_search_in_progress(struct p2p_data * p2p)3967 int p2p_search_in_progress(struct p2p_data *p2p)
3968 {
3969 if (p2p == NULL)
3970 return 0;
3971
3972 return p2p->state == P2P_SEARCH;
3973 }
3974 #endif
3975
p2p_in_progress(struct p2p_data * p2p)3976 int p2p_in_progress(struct p2p_data *p2p)
3977 {
3978 if (p2p == NULL)
3979 return 0;
3980 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
3981 }
3982