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 #ifndef P2P_PEER_EXPIRATION_AGE
46 #define P2P_PEER_EXPIRATION_AGE 60
47 #endif /* P2P_PEER_EXPIRATION_AGE */
48
49 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
50
p2p_expire_peers(struct p2p_data * p2p)51 static void p2p_expire_peers(struct p2p_data *p2p)
52 {
53 struct p2p_device *dev, *n;
54 struct os_reltime now;
55 size_t i;
56
57 os_get_reltime(&now);
58 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
59 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
60 continue;
61
62 if (dev == p2p->go_neg_peer) {
63 /*
64 * GO Negotiation is in progress with the peer, so
65 * don't expire the peer entry until GO Negotiation
66 * fails or times out.
67 */
68 continue;
69 }
70
71 if (p2p->cfg->go_connected &&
72 p2p->cfg->go_connected(p2p->cfg->cb_ctx,
73 dev->info.p2p_device_addr)) {
74 /*
75 * We are connected as a client to a group in which the
76 * peer is the GO, so do not expire the peer entry.
77 */
78 os_get_reltime(&dev->last_seen);
79 continue;
80 }
81
82 for (i = 0; i < p2p->num_groups; i++) {
83 if (p2p_group_is_client_connected(
84 p2p->groups[i], dev->info.p2p_device_addr))
85 break;
86 }
87 if (i < p2p->num_groups) {
88 /*
89 * The peer is connected as a client in a group where
90 * we are the GO, so do not expire the peer entry.
91 */
92 os_get_reltime(&dev->last_seen);
93 continue;
94 }
95
96 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
97 MAC2STR(dev->info.p2p_device_addr));
98 dl_list_del(&dev->list);
99 p2p_device_free(p2p, dev);
100 }
101 }
102
103
p2p_expiration_timeout(void * eloop_ctx,void * timeout_ctx)104 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
105 {
106 struct p2p_data *p2p = eloop_ctx;
107 p2p_expire_peers(p2p);
108 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
109 p2p_expiration_timeout, p2p, NULL);
110 }
111
112
p2p_state_txt(int state)113 static const char * p2p_state_txt(int state)
114 {
115 switch (state) {
116 case P2P_IDLE:
117 return "IDLE";
118 case P2P_SEARCH:
119 return "SEARCH";
120 case P2P_CONNECT:
121 return "CONNECT";
122 case P2P_CONNECT_LISTEN:
123 return "CONNECT_LISTEN";
124 case P2P_GO_NEG:
125 return "GO_NEG";
126 case P2P_LISTEN_ONLY:
127 return "LISTEN_ONLY";
128 case P2P_WAIT_PEER_CONNECT:
129 return "WAIT_PEER_CONNECT";
130 case P2P_WAIT_PEER_IDLE:
131 return "WAIT_PEER_IDLE";
132 case P2P_SD_DURING_FIND:
133 return "SD_DURING_FIND";
134 case P2P_PROVISIONING:
135 return "PROVISIONING";
136 case P2P_PD_DURING_FIND:
137 return "PD_DURING_FIND";
138 case P2P_INVITE:
139 return "INVITE";
140 case P2P_INVITE_LISTEN:
141 return "INVITE_LISTEN";
142 default:
143 return "?";
144 }
145 }
146
147
p2p_get_state_txt(struct p2p_data * p2p)148 const char * p2p_get_state_txt(struct p2p_data *p2p)
149 {
150 return p2p_state_txt(p2p->state);
151 }
152
153
p2p_get_provisioning_info(struct p2p_data * p2p,const u8 * addr)154 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
155 {
156 struct p2p_device *dev = NULL;
157
158 if (!addr || !p2p)
159 return 0;
160
161 dev = p2p_get_device(p2p, addr);
162 if (dev)
163 return dev->wps_prov_info;
164 else
165 return 0;
166 }
167
168
p2p_clear_provisioning_info(struct p2p_data * p2p,const u8 * addr)169 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
170 {
171 struct p2p_device *dev = NULL;
172
173 if (!addr || !p2p)
174 return;
175
176 dev = p2p_get_device(p2p, addr);
177 if (dev)
178 dev->wps_prov_info = 0;
179 }
180
181
p2p_set_state(struct p2p_data * p2p,int new_state)182 void p2p_set_state(struct p2p_data *p2p, int new_state)
183 {
184 p2p_dbg(p2p, "State %s -> %s",
185 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
186 p2p->state = new_state;
187
188 if (new_state == P2P_IDLE && p2p->pending_channel) {
189 p2p_dbg(p2p, "Apply change in listen channel");
190 p2p->cfg->reg_class = p2p->pending_reg_class;
191 p2p->cfg->channel = p2p->pending_channel;
192 p2p->pending_reg_class = 0;
193 p2p->pending_channel = 0;
194 }
195 }
196
197
p2p_set_timeout(struct p2p_data * p2p,unsigned int sec,unsigned int usec)198 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
199 {
200 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
201 p2p_state_txt(p2p->state), sec, usec);
202 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
203 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
204 }
205
206
p2p_clear_timeout(struct p2p_data * p2p)207 void p2p_clear_timeout(struct p2p_data *p2p)
208 {
209 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
210 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
211 }
212
213
p2p_go_neg_failed(struct p2p_data * p2p,struct p2p_device * peer,int status)214 void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer,
215 int status)
216 {
217 struct p2p_go_neg_results res;
218 p2p_clear_timeout(p2p);
219 p2p_set_state(p2p, P2P_IDLE);
220 if (p2p->go_neg_peer) {
221 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
222 p2p->go_neg_peer->wps_method = WPS_NOT_READY;
223 p2p->go_neg_peer->oob_pw_id = 0;
224 }
225 p2p->go_neg_peer = NULL;
226
227 os_memset(&res, 0, sizeof(res));
228 res.status = status;
229 if (peer) {
230 wpabuf_free(peer->go_neg_conf);
231 peer->go_neg_conf = NULL;
232 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr,
233 ETH_ALEN);
234 os_memcpy(res.peer_interface_addr, peer->intended_addr,
235 ETH_ALEN);
236 }
237 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
238 }
239
240
p2p_listen_in_find(struct p2p_data * p2p,int dev_disc)241 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
242 {
243 unsigned int r, tu;
244 int freq;
245 struct wpabuf *ies;
246
247 p2p_dbg(p2p, "Starting short listen state (state=%s)",
248 p2p_state_txt(p2p->state));
249
250 if (p2p->pending_listen_freq) {
251 /* We have a pending p2p_listen request */
252 p2p_dbg(p2p, "p2p_listen command pending already");
253 return;
254 }
255
256 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
257 if (freq < 0) {
258 p2p_dbg(p2p, "Unknown regulatory class/channel");
259 return;
260 }
261
262 os_get_random((u8 *) &r, sizeof(r));
263 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
264 p2p->min_disc_int) * 100;
265 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
266 tu = p2p->max_disc_tu;
267 if (!dev_disc && tu < 100)
268 tu = 100; /* Need to wait in non-device discovery use cases */
269 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
270 tu = p2p->cfg->max_listen * 1000 / 1024;
271
272 if (tu == 0) {
273 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
274 p2p_set_timeout(p2p, 0, 0);
275 return;
276 }
277
278 ies = p2p_build_probe_resp_ies(p2p);
279 if (ies == NULL)
280 return;
281
282 p2p->pending_listen_freq = freq;
283 p2p->pending_listen_sec = 0;
284 p2p->pending_listen_usec = 1024 * tu;
285
286 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
287 ies) < 0) {
288 p2p_dbg(p2p, "Failed to start listen mode");
289 p2p->pending_listen_freq = 0;
290 }
291 wpabuf_free(ies);
292 }
293
294
p2p_listen(struct p2p_data * p2p,unsigned int timeout)295 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
296 {
297 int freq;
298 struct wpabuf *ies;
299
300 p2p_dbg(p2p, "Going to listen(only) state");
301
302 if (p2p->pending_listen_freq) {
303 /* We have a pending p2p_listen request */
304 p2p_dbg(p2p, "p2p_listen command pending already");
305 return -1;
306 }
307
308 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
309 if (freq < 0) {
310 p2p_dbg(p2p, "Unknown regulatory class/channel");
311 return -1;
312 }
313
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_CONNECT) {
319 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
320 return 0;
321 }
322 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
323 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
324 return 0;
325 }
326
327 ies = p2p_build_probe_resp_ies(p2p);
328 if (ies == NULL)
329 return -1;
330
331 p2p->pending_listen_freq = freq;
332
333 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
334 p2p_dbg(p2p, "Failed to start listen mode");
335 p2p->pending_listen_freq = 0;
336 wpabuf_free(ies);
337 return -1;
338 }
339 wpabuf_free(ies);
340
341 p2p_set_state(p2p, P2P_LISTEN_ONLY);
342
343 return 0;
344 }
345
346
p2p_device_clear_reported(struct p2p_data * p2p)347 static void p2p_device_clear_reported(struct p2p_data *p2p)
348 {
349 struct p2p_device *dev;
350 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list)
351 dev->flags &= ~P2P_DEV_REPORTED;
352 }
353
354
355 /**
356 * p2p_get_device - Fetch a peer entry
357 * @p2p: P2P module context from p2p_init()
358 * @addr: P2P Device Address of the peer
359 * Returns: Pointer to the device entry or %NULL if not found
360 */
p2p_get_device(struct p2p_data * p2p,const u8 * addr)361 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
362 {
363 struct p2p_device *dev;
364 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
365 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
366 return dev;
367 }
368 return NULL;
369 }
370
371
372 /**
373 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
374 * @p2p: P2P module context from p2p_init()
375 * @addr: P2P Interface Address of the peer
376 * Returns: Pointer to the device entry or %NULL if not found
377 */
p2p_get_device_interface(struct p2p_data * p2p,const u8 * addr)378 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
379 const u8 *addr)
380 {
381 struct p2p_device *dev;
382 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
383 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
384 return dev;
385 }
386 return NULL;
387 }
388
389
390 /**
391 * p2p_create_device - Create a peer entry
392 * @p2p: P2P module context from p2p_init()
393 * @addr: P2P Device Address of the peer
394 * Returns: Pointer to the device entry or %NULL on failure
395 *
396 * If there is already an entry for the peer, it will be returned instead of
397 * creating a new one.
398 */
p2p_create_device(struct p2p_data * p2p,const u8 * addr)399 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
400 const u8 *addr)
401 {
402 struct p2p_device *dev, *oldest = NULL;
403 size_t count = 0;
404
405 dev = p2p_get_device(p2p, addr);
406 if (dev)
407 return dev;
408
409 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
410 count++;
411 if (oldest == NULL ||
412 os_reltime_before(&dev->last_seen, &oldest->last_seen))
413 oldest = dev;
414 }
415 if (count + 1 > p2p->cfg->max_peers && oldest) {
416 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
417 dl_list_del(&oldest->list);
418 p2p_device_free(p2p, oldest);
419 }
420
421 dev = os_zalloc(sizeof(*dev));
422 if (dev == NULL)
423 return NULL;
424 dl_list_add(&p2p->devices, &dev->list);
425 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
426
427 return dev;
428 }
429
430
p2p_copy_client_info(struct p2p_device * dev,struct p2p_client_info * cli)431 static void p2p_copy_client_info(struct p2p_device *dev,
432 struct p2p_client_info *cli)
433 {
434 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
435 dev->info.device_name[cli->dev_name_len] = '\0';
436 dev->info.dev_capab = cli->dev_capab;
437 dev->info.config_methods = cli->config_methods;
438 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
439 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
440 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
441 dev->info.wps_sec_dev_type_list_len);
442 }
443
444
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)445 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
446 const u8 *go_interface_addr, int freq,
447 const u8 *gi, size_t gi_len)
448 {
449 struct p2p_group_info info;
450 size_t c;
451 struct p2p_device *dev;
452
453 if (gi == NULL)
454 return 0;
455
456 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
457 return -1;
458
459 /*
460 * Clear old data for this group; if the devices are still in the
461 * group, the information will be restored in the loop following this.
462 */
463 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
464 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
465 ETH_ALEN) == 0) {
466 os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
467 os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
468 }
469 }
470
471 for (c = 0; c < info.num_clients; c++) {
472 struct p2p_client_info *cli = &info.client[c];
473 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
474 ETH_ALEN) == 0)
475 continue; /* ignore our own entry */
476 dev = p2p_get_device(p2p, cli->p2p_device_addr);
477 if (dev) {
478 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
479 P2P_DEV_PROBE_REQ_ONLY)) {
480 /*
481 * Update information since we have not
482 * received this directly from the client.
483 */
484 p2p_copy_client_info(dev, cli);
485 } else {
486 /*
487 * Need to update P2P Client Discoverability
488 * flag since it is valid only in P2P Group
489 * Info attribute.
490 */
491 dev->info.dev_capab &=
492 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
493 dev->info.dev_capab |=
494 cli->dev_capab &
495 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
496 }
497 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
498 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
499 }
500 } else {
501 dev = p2p_create_device(p2p, cli->p2p_device_addr);
502 if (dev == NULL)
503 continue;
504 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
505 p2p_copy_client_info(dev, cli);
506 dev->oper_freq = freq;
507 p2p->cfg->dev_found(p2p->cfg->cb_ctx,
508 dev->info.p2p_device_addr,
509 &dev->info, 1);
510 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
511 }
512
513 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
514 ETH_ALEN);
515 os_get_reltime(&dev->last_seen);
516 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
517 os_memcpy(dev->member_in_go_iface, go_interface_addr,
518 ETH_ALEN);
519 }
520
521 return 0;
522 }
523
524
p2p_copy_wps_info(struct p2p_data * p2p,struct p2p_device * dev,int probe_req,const struct p2p_message * msg)525 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
526 int probe_req, const struct p2p_message *msg)
527 {
528 os_memcpy(dev->info.device_name, msg->device_name,
529 sizeof(dev->info.device_name));
530
531 if (msg->manufacturer &&
532 msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
533 os_memset(dev->info.manufacturer, 0,
534 sizeof(dev->info.manufacturer));
535 os_memcpy(dev->info.manufacturer, msg->manufacturer,
536 msg->manufacturer_len);
537 }
538
539 if (msg->model_name &&
540 msg->model_name_len < sizeof(dev->info.model_name)) {
541 os_memset(dev->info.model_name, 0,
542 sizeof(dev->info.model_name));
543 os_memcpy(dev->info.model_name, msg->model_name,
544 msg->model_name_len);
545 }
546
547 if (msg->model_number &&
548 msg->model_number_len < sizeof(dev->info.model_number)) {
549 os_memset(dev->info.model_number, 0,
550 sizeof(dev->info.model_number));
551 os_memcpy(dev->info.model_number, msg->model_number,
552 msg->model_number_len);
553 }
554
555 if (msg->serial_number &&
556 msg->serial_number_len < sizeof(dev->info.serial_number)) {
557 os_memset(dev->info.serial_number, 0,
558 sizeof(dev->info.serial_number));
559 os_memcpy(dev->info.serial_number, msg->serial_number,
560 msg->serial_number_len);
561 }
562
563 if (msg->pri_dev_type)
564 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
565 sizeof(dev->info.pri_dev_type));
566 else if (msg->wps_pri_dev_type)
567 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
568 sizeof(dev->info.pri_dev_type));
569
570 if (msg->wps_sec_dev_type_list) {
571 os_memcpy(dev->info.wps_sec_dev_type_list,
572 msg->wps_sec_dev_type_list,
573 msg->wps_sec_dev_type_list_len);
574 dev->info.wps_sec_dev_type_list_len =
575 msg->wps_sec_dev_type_list_len;
576 }
577
578 if (msg->capability) {
579 /*
580 * P2P Client Discoverability bit is reserved in all frames
581 * that use this function, so do not change its value here.
582 */
583 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
584 dev->info.dev_capab |= msg->capability[0] &
585 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
586 dev->info.group_capab = msg->capability[1];
587 }
588
589 if (msg->ext_listen_timing) {
590 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
591 dev->ext_listen_interval =
592 WPA_GET_LE16(msg->ext_listen_timing + 2);
593 }
594
595 if (!probe_req) {
596 u16 new_config_methods;
597 new_config_methods = msg->config_methods ?
598 msg->config_methods : msg->wps_config_methods;
599 if (new_config_methods &&
600 dev->info.config_methods != new_config_methods) {
601 p2p_dbg(p2p, "Update peer " MACSTR
602 " config_methods 0x%x -> 0x%x",
603 MAC2STR(dev->info.p2p_device_addr),
604 dev->info.config_methods,
605 new_config_methods);
606 dev->info.config_methods = new_config_methods;
607 }
608 }
609 }
610
611
p2p_update_peer_vendor_elems(struct p2p_device * dev,const u8 * ies,size_t ies_len)612 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
613 size_t ies_len)
614 {
615 const u8 *pos, *end;
616 u8 id, len;
617
618 wpabuf_free(dev->info.vendor_elems);
619 dev->info.vendor_elems = NULL;
620
621 end = ies + ies_len;
622
623 for (pos = ies; pos + 1 < end; pos += len) {
624 id = *pos++;
625 len = *pos++;
626
627 if (pos + len > end)
628 break;
629
630 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
631 continue;
632
633 if (len >= 4) {
634 u32 type = WPA_GET_BE32(pos);
635
636 if (type == WPA_IE_VENDOR_TYPE ||
637 type == WMM_IE_VENDOR_TYPE ||
638 type == WPS_IE_VENDOR_TYPE ||
639 type == P2P_IE_VENDOR_TYPE ||
640 type == WFD_IE_VENDOR_TYPE)
641 continue;
642 }
643
644 /* Unknown vendor element - make raw IE data available */
645 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
646 break;
647 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
648 }
649 }
650
651
652 /**
653 * p2p_add_device - Add peer entries based on scan results or P2P frames
654 * @p2p: P2P module context from p2p_init()
655 * @addr: Source address of Beacon or Probe Response frame (may be either
656 * P2P Device Address or P2P Interface Address)
657 * @level: Signal level (signal strength of the received frame from the peer)
658 * @freq: Frequency on which the Beacon or Probe Response frame was received
659 * @rx_time: Time when the result was received
660 * @ies: IEs from the Beacon or Probe Response frame
661 * @ies_len: Length of ies buffer in octets
662 * @scan_res: Whether this was based on scan results
663 * Returns: 0 on success, -1 on failure
664 *
665 * If the scan result is for a GO, the clients in the group will also be added
666 * to the peer table. This function can also be used with some other frames
667 * like Provision Discovery Request that contains P2P Capability and P2P Device
668 * Info attributes.
669 */
p2p_add_device(struct p2p_data * p2p,const u8 * addr,int freq,struct os_reltime * rx_time,int level,const u8 * ies,size_t ies_len,int scan_res)670 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
671 struct os_reltime *rx_time, int level, const u8 *ies,
672 size_t ies_len, int scan_res)
673 {
674 struct p2p_device *dev;
675 struct p2p_message msg;
676 const u8 *p2p_dev_addr;
677 int i;
678 struct os_reltime time_now;
679
680 os_memset(&msg, 0, sizeof(msg));
681 if (p2p_parse_ies(ies, ies_len, &msg)) {
682 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
683 p2p_parse_free(&msg);
684 return -1;
685 }
686
687 if (msg.p2p_device_addr)
688 p2p_dev_addr = msg.p2p_device_addr;
689 else if (msg.device_id)
690 p2p_dev_addr = msg.device_id;
691 else {
692 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
693 p2p_parse_free(&msg);
694 return -1;
695 }
696
697 if (!is_zero_ether_addr(p2p->peer_filter) &&
698 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
699 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
700 " due to peer filter", MAC2STR(p2p_dev_addr));
701 p2p_parse_free(&msg);
702 return 0;
703 }
704
705 dev = p2p_create_device(p2p, p2p_dev_addr);
706 if (dev == NULL) {
707 p2p_parse_free(&msg);
708 return -1;
709 }
710
711 if (rx_time == NULL) {
712 os_get_reltime(&time_now);
713 rx_time = &time_now;
714 }
715
716 /*
717 * Update the device entry only if the new peer
718 * entry is newer than the one previously stored.
719 */
720 if (dev->last_seen.sec > 0 &&
721 os_reltime_before(rx_time, &dev->last_seen)) {
722 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
723 (unsigned int) rx_time->sec,
724 (unsigned int) rx_time->usec,
725 (unsigned int) dev->last_seen.sec,
726 (unsigned int) dev->last_seen.usec);
727 p2p_parse_free(&msg);
728 return -1;
729 }
730
731 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
732
733 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
734
735 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
736 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
737 if (msg.ssid &&
738 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
739 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
740 != 0)) {
741 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
742 dev->oper_ssid_len = msg.ssid[1];
743 }
744
745 if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
746 *msg.ds_params >= 1 && *msg.ds_params <= 14) {
747 int ds_freq;
748 if (*msg.ds_params == 14)
749 ds_freq = 2484;
750 else
751 ds_freq = 2407 + *msg.ds_params * 5;
752 if (freq != ds_freq) {
753 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
754 freq, ds_freq);
755 freq = ds_freq;
756 }
757 }
758
759 if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
760 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
761 MACSTR " %d -> %d MHz (DS param %d)",
762 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
763 freq, msg.ds_params ? *msg.ds_params : -1);
764 }
765 if (scan_res) {
766 dev->listen_freq = freq;
767 if (msg.group_info)
768 dev->oper_freq = freq;
769 }
770 dev->info.level = level;
771
772 p2p_copy_wps_info(p2p, dev, 0, &msg);
773
774 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
775 wpabuf_free(dev->info.wps_vendor_ext[i]);
776 dev->info.wps_vendor_ext[i] = NULL;
777 }
778
779 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
780 if (msg.wps_vendor_ext[i] == NULL)
781 break;
782 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
783 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
784 if (dev->info.wps_vendor_ext[i] == NULL)
785 break;
786 }
787
788 if (msg.wfd_subelems) {
789 wpabuf_free(dev->info.wfd_subelems);
790 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
791 }
792
793 if (scan_res) {
794 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
795 msg.group_info, msg.group_info_len);
796 }
797
798 p2p_parse_free(&msg);
799
800 p2p_update_peer_vendor_elems(dev, ies, ies_len);
801
802 if (dev->flags & P2P_DEV_REPORTED)
803 return 0;
804
805 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
806 freq, (unsigned int) rx_time->sec,
807 (unsigned int) rx_time->usec);
808 if (dev->flags & P2P_DEV_USER_REJECTED) {
809 p2p_dbg(p2p, "Do not report rejected device");
810 return 0;
811 }
812
813 if (dev->info.config_methods == 0 &&
814 (freq == 2412 || freq == 2437 || freq == 2462)) {
815 /*
816 * If we have only seen a Beacon frame from a GO, we do not yet
817 * know what WPS config methods it supports. Since some
818 * applications use config_methods value from P2P-DEVICE-FOUND
819 * events, postpone reporting this peer until we've fully
820 * discovered its capabilities.
821 *
822 * At least for now, do this only if the peer was detected on
823 * one of the social channels since that peer can be easily be
824 * found again and there are no limitations of having to use
825 * passive scan on this channels, so this can be done through
826 * Probe Response frame that includes the config_methods
827 * information.
828 */
829 p2p_dbg(p2p, "Do not report peer " MACSTR
830 " with unknown config methods", MAC2STR(addr));
831 return 0;
832 }
833
834 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
835 !(dev->flags & P2P_DEV_REPORTED_ONCE));
836 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
837
838 return 0;
839 }
840
841
p2p_device_free(struct p2p_data * p2p,struct p2p_device * dev)842 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
843 {
844 int i;
845
846 if (p2p->go_neg_peer == dev) {
847 /*
848 * If GO Negotiation is in progress, report that it has failed.
849 */
850 p2p_go_neg_failed(p2p, dev, -1);
851 p2p->go_neg_peer = NULL;
852 }
853 if (p2p->invite_peer == dev)
854 p2p->invite_peer = NULL;
855 if (p2p->sd_peer == dev)
856 p2p->sd_peer = NULL;
857 if (p2p->pending_client_disc_go == dev)
858 p2p->pending_client_disc_go = NULL;
859
860 /* dev_lost() device, but only if it was previously dev_found() */
861 if (dev->flags & P2P_DEV_REPORTED_ONCE)
862 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
863 dev->info.p2p_device_addr);
864
865 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
866 wpabuf_free(dev->info.wps_vendor_ext[i]);
867 dev->info.wps_vendor_ext[i] = NULL;
868 }
869
870 wpabuf_free(dev->info.wfd_subelems);
871 wpabuf_free(dev->info.vendor_elems);
872 wpabuf_free(dev->go_neg_conf);
873
874 os_free(dev);
875 }
876
877
p2p_get_next_prog_freq(struct p2p_data * p2p)878 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
879 {
880 struct p2p_channels *c;
881 struct p2p_reg_class *cla;
882 size_t cl, ch;
883 int found = 0;
884 u8 reg_class;
885 u8 channel;
886 int freq;
887
888 c = &p2p->cfg->channels;
889 for (cl = 0; cl < c->reg_classes; cl++) {
890 cla = &c->reg_class[cl];
891 if (cla->reg_class != p2p->last_prog_scan_class)
892 continue;
893 for (ch = 0; ch < cla->channels; ch++) {
894 if (cla->channel[ch] == p2p->last_prog_scan_chan) {
895 found = 1;
896 break;
897 }
898 }
899 if (found)
900 break;
901 }
902
903 if (!found) {
904 /* Start from beginning */
905 reg_class = c->reg_class[0].reg_class;
906 channel = c->reg_class[0].channel[0];
907 } else {
908 /* Pick the next channel */
909 ch++;
910 if (ch == cla->channels) {
911 cl++;
912 if (cl == c->reg_classes)
913 cl = 0;
914 ch = 0;
915 }
916 reg_class = c->reg_class[cl].reg_class;
917 channel = c->reg_class[cl].channel[ch];
918 }
919
920 freq = p2p_channel_to_freq(reg_class, channel);
921 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
922 reg_class, channel, freq);
923 p2p->last_prog_scan_class = reg_class;
924 p2p->last_prog_scan_chan = channel;
925
926 if (freq == 2412 || freq == 2437 || freq == 2462)
927 return 0; /* No need to add social channels */
928 return freq;
929 }
930
931
p2p_search(struct p2p_data * p2p)932 static void p2p_search(struct p2p_data *p2p)
933 {
934 int freq = 0;
935 enum p2p_scan_type type;
936 u16 pw_id = DEV_PW_DEFAULT;
937 int res;
938
939 if (p2p->drv_in_listen) {
940 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
941 return;
942 }
943 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
944
945 if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
946 (freq = p2p_get_next_prog_freq(p2p)) > 0) {
947 type = P2P_SCAN_SOCIAL_PLUS_ONE;
948 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
949 } else {
950 type = P2P_SCAN_SOCIAL;
951 p2p_dbg(p2p, "Starting search");
952 }
953
954 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
955 p2p->num_req_dev_types, p2p->req_dev_types,
956 p2p->find_dev_id, pw_id);
957 if (res < 0) {
958 p2p_dbg(p2p, "Scan request failed");
959 p2p_continue_find(p2p);
960 } else {
961 p2p_dbg(p2p, "Running p2p_scan");
962 p2p->p2p_scan_running = 1;
963 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
964 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
965 p2p, NULL);
966 }
967 }
968
969
p2p_find_timeout(void * eloop_ctx,void * timeout_ctx)970 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
971 {
972 struct p2p_data *p2p = eloop_ctx;
973 p2p_dbg(p2p, "Find timeout -> stop");
974 p2p_stop_find(p2p);
975 }
976
977
p2p_run_after_scan(struct p2p_data * p2p)978 static int p2p_run_after_scan(struct p2p_data *p2p)
979 {
980 struct p2p_device *dev;
981 enum p2p_after_scan op;
982
983 if (p2p->after_scan_tx) {
984 p2p->after_scan_tx_in_progress = 1;
985 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
986 p2p->cfg->send_action(p2p->cfg->cb_ctx,
987 p2p->after_scan_tx->freq,
988 p2p->after_scan_tx->dst,
989 p2p->after_scan_tx->src,
990 p2p->after_scan_tx->bssid,
991 (u8 *) (p2p->after_scan_tx + 1),
992 p2p->after_scan_tx->len,
993 p2p->after_scan_tx->wait_time);
994 os_free(p2p->after_scan_tx);
995 p2p->after_scan_tx = NULL;
996 return 1;
997 }
998
999 op = p2p->start_after_scan;
1000 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1001 switch (op) {
1002 case P2P_AFTER_SCAN_NOTHING:
1003 break;
1004 case P2P_AFTER_SCAN_LISTEN:
1005 p2p_dbg(p2p, "Start previously requested Listen state");
1006 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1007 p2p->pending_listen_usec / 1000);
1008 return 1;
1009 case P2P_AFTER_SCAN_CONNECT:
1010 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1011 MAC2STR(p2p->after_scan_peer));
1012 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1013 if (dev == NULL) {
1014 p2p_dbg(p2p, "Peer not known anymore");
1015 break;
1016 }
1017 p2p_connect_send(p2p, dev);
1018 return 1;
1019 }
1020
1021 return 0;
1022 }
1023
1024
p2p_scan_timeout(void * eloop_ctx,void * timeout_ctx)1025 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1026 {
1027 struct p2p_data *p2p = eloop_ctx;
1028 int running;
1029 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1030 running = p2p->p2p_scan_running;
1031 /* Make sure we recover from missed scan results callback */
1032 p2p->p2p_scan_running = 0;
1033
1034 if (running)
1035 p2p_run_after_scan(p2p);
1036 }
1037
1038
p2p_free_req_dev_types(struct p2p_data * p2p)1039 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1040 {
1041 p2p->num_req_dev_types = 0;
1042 os_free(p2p->req_dev_types);
1043 p2p->req_dev_types = NULL;
1044 }
1045
1046
p2p_find(struct p2p_data * p2p,unsigned int timeout,enum p2p_discovery_type type,unsigned int num_req_dev_types,const u8 * req_dev_types,const u8 * dev_id,unsigned int search_delay)1047 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1048 enum p2p_discovery_type type,
1049 unsigned int num_req_dev_types, const u8 *req_dev_types,
1050 const u8 *dev_id, unsigned int search_delay)
1051 {
1052 int res;
1053
1054 p2p_dbg(p2p, "Starting find (type=%d)", type);
1055 os_get_reltime(&p2p->find_start);
1056 if (p2p->p2p_scan_running) {
1057 p2p_dbg(p2p, "p2p_scan is already running");
1058 }
1059
1060 p2p_free_req_dev_types(p2p);
1061 if (req_dev_types && num_req_dev_types) {
1062 p2p->req_dev_types = os_malloc(num_req_dev_types *
1063 WPS_DEV_TYPE_LEN);
1064 if (p2p->req_dev_types == NULL)
1065 return -1;
1066 os_memcpy(p2p->req_dev_types, req_dev_types,
1067 num_req_dev_types * WPS_DEV_TYPE_LEN);
1068 p2p->num_req_dev_types = num_req_dev_types;
1069 }
1070
1071 if (dev_id) {
1072 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1073 p2p->find_dev_id = p2p->find_dev_id_buf;
1074 } else
1075 p2p->find_dev_id = NULL;
1076
1077 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1078 p2p_clear_timeout(p2p);
1079 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1080 p2p->find_type = type;
1081 p2p_device_clear_reported(p2p);
1082 p2p_set_state(p2p, P2P_SEARCH);
1083 p2p->search_delay = search_delay;
1084 p2p->in_search_delay = 0;
1085 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1086 p2p->last_p2p_find_timeout = timeout;
1087 if (timeout)
1088 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1089 p2p, NULL);
1090 switch (type) {
1091 case P2P_FIND_START_WITH_FULL:
1092 case P2P_FIND_PROGRESSIVE:
1093 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1094 p2p->num_req_dev_types,
1095 p2p->req_dev_types, dev_id,
1096 DEV_PW_DEFAULT);
1097 break;
1098 case P2P_FIND_ONLY_SOCIAL:
1099 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1100 p2p->num_req_dev_types,
1101 p2p->req_dev_types, dev_id,
1102 DEV_PW_DEFAULT);
1103 break;
1104 default:
1105 return -1;
1106 }
1107
1108 if (res == 0) {
1109 p2p_dbg(p2p, "Running p2p_scan");
1110 p2p->p2p_scan_running = 1;
1111 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1112 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1113 p2p, NULL);
1114 } else if (p2p->p2p_scan_running) {
1115 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1116 /* wait for the previous p2p_scan to complete */
1117 res = 0; /* do not report failure */
1118 } else {
1119 p2p_dbg(p2p, "Failed to start p2p_scan");
1120 p2p_set_state(p2p, P2P_IDLE);
1121 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1122 }
1123
1124 return res;
1125 }
1126
1127
p2p_stop_find_for_freq(struct p2p_data * p2p,int freq)1128 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1129 {
1130 p2p_dbg(p2p, "Stopping find");
1131 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1132 p2p_clear_timeout(p2p);
1133 if (p2p->state == P2P_SEARCH)
1134 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1135 p2p_set_state(p2p, P2P_IDLE);
1136 p2p_free_req_dev_types(p2p);
1137 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1138 if (p2p->go_neg_peer)
1139 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1140 p2p->go_neg_peer = NULL;
1141 p2p->sd_peer = NULL;
1142 p2p->invite_peer = NULL;
1143 p2p_stop_listen_for_freq(p2p, freq);
1144 }
1145
1146
p2p_stop_listen_for_freq(struct p2p_data * p2p,int freq)1147 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1148 {
1149 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1150 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1151 return;
1152 }
1153 if (p2p->in_listen) {
1154 p2p->in_listen = 0;
1155 p2p_clear_timeout(p2p);
1156 }
1157 if (p2p->drv_in_listen) {
1158 /*
1159 * The driver may not deliver callback to p2p_listen_end()
1160 * when the operation gets canceled, so clear the internal
1161 * variable that is tracking driver state.
1162 */
1163 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1164 p2p->drv_in_listen = 0;
1165 }
1166 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1167 }
1168
1169
p2p_stop_listen(struct p2p_data * p2p)1170 void p2p_stop_listen(struct p2p_data *p2p)
1171 {
1172 if (p2p->state != P2P_LISTEN_ONLY) {
1173 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1174 return;
1175 }
1176
1177 p2p_stop_listen_for_freq(p2p, 0);
1178 p2p_set_state(p2p, P2P_IDLE);
1179 }
1180
1181
p2p_stop_find(struct p2p_data * p2p)1182 void p2p_stop_find(struct p2p_data *p2p)
1183 {
1184 p2p->pending_listen_freq = 0;
1185 p2p_stop_find_for_freq(p2p, 0);
1186 }
1187
1188
p2p_prepare_channel_pref(struct p2p_data * p2p,unsigned int force_freq,unsigned int pref_freq,int go)1189 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1190 unsigned int force_freq,
1191 unsigned int pref_freq, int go)
1192 {
1193 u8 op_class, op_channel;
1194 unsigned int freq = force_freq ? force_freq : pref_freq;
1195
1196 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1197 force_freq, pref_freq, go);
1198 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1199 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1200 return -1;
1201 }
1202
1203 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1204 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1205 op_channel))) {
1206 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1207 freq, op_class, op_channel);
1208 return -1;
1209 }
1210
1211 p2p->op_reg_class = op_class;
1212 p2p->op_channel = op_channel;
1213
1214 if (force_freq) {
1215 p2p->channels.reg_classes = 1;
1216 p2p->channels.reg_class[0].channels = 1;
1217 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1218 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1219 } else {
1220 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1221 sizeof(struct p2p_channels));
1222 }
1223
1224 return 0;
1225 }
1226
1227
p2p_prepare_channel_best(struct p2p_data * p2p)1228 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1229 {
1230 u8 op_class, op_channel;
1231 const int op_classes_5ghz[] = { 124, 115, 0 };
1232 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1233 const int op_classes_vht[] = { 128, 0 };
1234
1235 p2p_dbg(p2p, "Prepare channel best");
1236
1237 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1238 p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1239 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1240 == 0) {
1241 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1242 p2p->op_reg_class = op_class;
1243 p2p->op_channel = op_channel;
1244 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1245 p2p_supported_freq(p2p, p2p->best_freq_5) &&
1246 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1247 == 0) {
1248 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1249 p2p->op_reg_class = op_class;
1250 p2p->op_channel = op_channel;
1251 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1252 p2p_supported_freq(p2p, p2p->best_freq_24) &&
1253 p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1254 &op_channel) == 0) {
1255 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1256 p2p->op_reg_class = op_class;
1257 p2p->op_channel = op_channel;
1258 } else if (p2p->cfg->num_pref_chan > 0 &&
1259 p2p_channels_includes(&p2p->cfg->channels,
1260 p2p->cfg->pref_chan[0].op_class,
1261 p2p->cfg->pref_chan[0].chan)) {
1262 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1263 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1264 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1265 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1266 &p2p->op_reg_class, &p2p->op_channel) ==
1267 0) {
1268 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1269 p2p->op_reg_class, p2p->op_channel);
1270 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1271 &p2p->op_reg_class, &p2p->op_channel) ==
1272 0) {
1273 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1274 p2p->op_reg_class, p2p->op_channel);
1275 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1276 &p2p->op_reg_class, &p2p->op_channel) ==
1277 0) {
1278 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1279 p2p->op_reg_class, p2p->op_channel);
1280 } else if (p2p_channels_includes(&p2p->cfg->channels,
1281 p2p->cfg->op_reg_class,
1282 p2p->cfg->op_channel)) {
1283 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1284 p2p->op_reg_class = p2p->cfg->op_reg_class;
1285 p2p->op_channel = p2p->cfg->op_channel;
1286 } else if (p2p_channel_random_social(&p2p->cfg->channels,
1287 &p2p->op_reg_class,
1288 &p2p->op_channel) == 0) {
1289 p2p_dbg(p2p, "Select random available social channel %d from 2.4 GHz band as operating channel preference",
1290 p2p->op_channel);
1291 } else {
1292 /* Select any random available channel from the first available
1293 * operating class */
1294 p2p_channel_select(&p2p->cfg->channels, NULL,
1295 &p2p->op_reg_class,
1296 &p2p->op_channel);
1297 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1298 p2p->op_channel, p2p->op_reg_class);
1299 }
1300
1301 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1302 sizeof(struct p2p_channels));
1303 }
1304
1305
1306 /**
1307 * p2p_prepare_channel - Select operating channel for GO Negotiation
1308 * @p2p: P2P module context from p2p_init()
1309 * @dev: Selected peer device
1310 * @force_freq: Forced frequency in MHz or 0 if not forced
1311 * @pref_freq: Preferred frequency in MHz or 0 if no preference
1312 * @go: Whether the local end will be forced to be GO
1313 * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1314 *
1315 * This function is used to do initial operating channel selection for GO
1316 * Negotiation prior to having received peer information. The selected channel
1317 * may be further optimized in p2p_reselect_channel() once the peer information
1318 * is available.
1319 */
p2p_prepare_channel(struct p2p_data * p2p,struct p2p_device * dev,unsigned int force_freq,unsigned int pref_freq,int go)1320 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1321 unsigned int force_freq, unsigned int pref_freq, int go)
1322 {
1323 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1324 force_freq, pref_freq, go);
1325 if (force_freq || pref_freq) {
1326 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1327 0)
1328 return -1;
1329 } else {
1330 p2p_prepare_channel_best(p2p);
1331 }
1332 p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1333 if (go)
1334 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1335 else if (!force_freq)
1336 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels,
1337 &p2p->channels);
1338 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1339
1340 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1341 p2p->op_reg_class, p2p->op_channel,
1342 force_freq ? " (forced)" : "");
1343
1344 if (force_freq)
1345 dev->flags |= P2P_DEV_FORCE_FREQ;
1346 else
1347 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1348
1349 return 0;
1350 }
1351
1352
p2p_set_dev_persistent(struct p2p_device * dev,int persistent_group)1353 static void p2p_set_dev_persistent(struct p2p_device *dev,
1354 int persistent_group)
1355 {
1356 switch (persistent_group) {
1357 case 0:
1358 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1359 P2P_DEV_PREFER_PERSISTENT_RECONN);
1360 break;
1361 case 1:
1362 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1363 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1364 break;
1365 case 2:
1366 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1367 P2P_DEV_PREFER_PERSISTENT_RECONN;
1368 break;
1369 }
1370 }
1371
1372
p2p_connect(struct p2p_data * p2p,const u8 * peer_addr,enum p2p_wps_method wps_method,int go_intent,const u8 * own_interface_addr,unsigned int force_freq,int persistent_group,const u8 * force_ssid,size_t force_ssid_len,int pd_before_go_neg,unsigned int pref_freq,u16 oob_pw_id)1373 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1374 enum p2p_wps_method wps_method,
1375 int go_intent, const u8 *own_interface_addr,
1376 unsigned int force_freq, int persistent_group,
1377 const u8 *force_ssid, size_t force_ssid_len,
1378 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1379 {
1380 struct p2p_device *dev;
1381
1382 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1383 " GO Intent=%d Intended Interface Address=" MACSTR
1384 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1385 "oob_pw_id=%u",
1386 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1387 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1388
1389 dev = p2p_get_device(p2p, peer_addr);
1390 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1391 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1392 MAC2STR(peer_addr));
1393 return -1;
1394 }
1395
1396 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1397 go_intent == 15) < 0)
1398 return -1;
1399
1400 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1401 if (!(dev->info.dev_capab &
1402 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1403 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1404 " that is in a group and is not discoverable",
1405 MAC2STR(peer_addr));
1406 return -1;
1407 }
1408 if (dev->oper_freq <= 0) {
1409 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1410 " with incomplete information",
1411 MAC2STR(peer_addr));
1412 return -1;
1413 }
1414
1415 /*
1416 * First, try to connect directly. If the peer does not
1417 * acknowledge frames, assume it is sleeping and use device
1418 * discoverability via the GO at that point.
1419 */
1420 }
1421
1422 p2p->ssid_set = 0;
1423 if (force_ssid) {
1424 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1425 force_ssid, force_ssid_len);
1426 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1427 p2p->ssid_len = force_ssid_len;
1428 p2p->ssid_set = 1;
1429 }
1430
1431 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1432 dev->flags &= ~P2P_DEV_USER_REJECTED;
1433 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1434 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1435 if (pd_before_go_neg)
1436 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1437 else {
1438 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1439 /*
1440 * Assign dialog token and tie breaker here to use the same
1441 * values in each retry within the same GO Negotiation exchange.
1442 */
1443 dev->dialog_token++;
1444 if (dev->dialog_token == 0)
1445 dev->dialog_token = 1;
1446 dev->tie_breaker = p2p->next_tie_breaker;
1447 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1448 }
1449 dev->connect_reqs = 0;
1450 dev->go_neg_req_sent = 0;
1451 dev->go_state = UNKNOWN_GO;
1452 p2p_set_dev_persistent(dev, persistent_group);
1453 p2p->go_intent = go_intent;
1454 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1455
1456 if (p2p->state != P2P_IDLE)
1457 p2p_stop_find(p2p);
1458
1459 if (p2p->after_scan_tx) {
1460 /*
1461 * We need to drop the pending frame to avoid issues with the
1462 * new GO Negotiation, e.g., when the pending frame was from a
1463 * previous attempt at starting a GO Negotiation.
1464 */
1465 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1466 os_free(p2p->after_scan_tx);
1467 p2p->after_scan_tx = NULL;
1468 }
1469
1470 dev->wps_method = wps_method;
1471 dev->oob_pw_id = oob_pw_id;
1472 dev->status = P2P_SC_SUCCESS;
1473
1474 if (p2p->p2p_scan_running) {
1475 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1476 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1477 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1478 return 0;
1479 }
1480 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1481
1482 return p2p_connect_send(p2p, dev);
1483 }
1484
1485
p2p_authorize(struct p2p_data * p2p,const u8 * peer_addr,enum p2p_wps_method wps_method,int go_intent,const u8 * own_interface_addr,unsigned int force_freq,int persistent_group,const u8 * force_ssid,size_t force_ssid_len,unsigned int pref_freq,u16 oob_pw_id)1486 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1487 enum p2p_wps_method wps_method,
1488 int go_intent, const u8 *own_interface_addr,
1489 unsigned int force_freq, int persistent_group,
1490 const u8 *force_ssid, size_t force_ssid_len,
1491 unsigned int pref_freq, u16 oob_pw_id)
1492 {
1493 struct p2p_device *dev;
1494
1495 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1496 " GO Intent=%d Intended Interface Address=" MACSTR
1497 " wps_method=%d persistent_group=%d oob_pw_id=%u",
1498 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1499 wps_method, persistent_group, oob_pw_id);
1500
1501 dev = p2p_get_device(p2p, peer_addr);
1502 if (dev == NULL) {
1503 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1504 MAC2STR(peer_addr));
1505 return -1;
1506 }
1507
1508 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1509 15) < 0)
1510 return -1;
1511
1512 p2p->ssid_set = 0;
1513 if (force_ssid) {
1514 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1515 force_ssid, force_ssid_len);
1516 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1517 p2p->ssid_len = force_ssid_len;
1518 p2p->ssid_set = 1;
1519 }
1520
1521 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1522 dev->flags &= ~P2P_DEV_USER_REJECTED;
1523 dev->go_neg_req_sent = 0;
1524 dev->go_state = UNKNOWN_GO;
1525 p2p_set_dev_persistent(dev, persistent_group);
1526 p2p->go_intent = go_intent;
1527 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1528
1529 dev->wps_method = wps_method;
1530 dev->oob_pw_id = oob_pw_id;
1531 dev->status = P2P_SC_SUCCESS;
1532
1533 return 0;
1534 }
1535
1536
p2p_add_dev_info(struct p2p_data * p2p,const u8 * addr,struct p2p_device * dev,struct p2p_message * msg)1537 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1538 struct p2p_device *dev, struct p2p_message *msg)
1539 {
1540 os_get_reltime(&dev->last_seen);
1541
1542 p2p_copy_wps_info(p2p, dev, 0, msg);
1543
1544 if (msg->listen_channel) {
1545 int freq;
1546 freq = p2p_channel_to_freq(msg->listen_channel[3],
1547 msg->listen_channel[4]);
1548 if (freq < 0) {
1549 p2p_dbg(p2p, "Unknown peer Listen channel: "
1550 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1551 msg->listen_channel[0],
1552 msg->listen_channel[1],
1553 msg->listen_channel[2],
1554 msg->listen_channel[3],
1555 msg->listen_channel[4]);
1556 } else {
1557 p2p_dbg(p2p, "Update peer " MACSTR
1558 " Listen channel: %u -> %u MHz",
1559 MAC2STR(dev->info.p2p_device_addr),
1560 dev->listen_freq, freq);
1561 dev->listen_freq = freq;
1562 }
1563 }
1564
1565 if (msg->wfd_subelems) {
1566 wpabuf_free(dev->info.wfd_subelems);
1567 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1568 }
1569
1570 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1571 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1572 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1573 } else {
1574 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1575 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1576 "listen_freq=%d",
1577 MAC2STR(dev->info.p2p_device_addr),
1578 dev->info.dev_capab, dev->info.group_capab,
1579 dev->info.device_name, dev->listen_freq);
1580 }
1581
1582 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1583
1584 if (dev->flags & P2P_DEV_USER_REJECTED) {
1585 p2p_dbg(p2p, "Do not report rejected device");
1586 return;
1587 }
1588
1589 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1590 !(dev->flags & P2P_DEV_REPORTED_ONCE));
1591 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1592 }
1593
1594
p2p_build_ssid(struct p2p_data * p2p,u8 * ssid,size_t * ssid_len)1595 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1596 {
1597 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1598 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1599 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1600 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1601 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1602 }
1603
1604
p2p_go_params(struct p2p_data * p2p,struct p2p_go_neg_results * params)1605 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1606 {
1607 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len);
1608 p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1609 return 0;
1610 }
1611
1612
p2p_go_complete(struct p2p_data * p2p,struct p2p_device * peer)1613 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1614 {
1615 struct p2p_go_neg_results res;
1616 int go = peer->go_state == LOCAL_GO;
1617 struct p2p_channels intersection;
1618 int freqs;
1619 size_t i, j;
1620
1621 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1622 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1623
1624 os_memset(&res, 0, sizeof(res));
1625 res.role_go = go;
1626 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1627 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1628 res.wps_method = peer->wps_method;
1629 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1630 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1631 res.persistent_group = 2;
1632 else
1633 res.persistent_group = 1;
1634 }
1635
1636 if (go) {
1637 /* Setup AP mode for WPS provisioning */
1638 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1639 p2p->op_channel);
1640 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1641 res.ssid_len = p2p->ssid_len;
1642 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1643 } else {
1644 res.freq = peer->oper_freq;
1645 if (p2p->ssid_len) {
1646 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1647 res.ssid_len = p2p->ssid_len;
1648 }
1649 }
1650
1651 p2p_channels_dump(p2p, "own channels", &p2p->channels);
1652 p2p_channels_dump(p2p, "peer channels", &peer->channels);
1653 p2p_channels_intersect(&p2p->channels, &peer->channels,
1654 &intersection);
1655 if (go) {
1656 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1657 p2p_channels_dump(p2p, "intersection after no-GO removal",
1658 &intersection);
1659 }
1660 freqs = 0;
1661 for (i = 0; i < intersection.reg_classes; i++) {
1662 struct p2p_reg_class *c = &intersection.reg_class[i];
1663 if (freqs + 1 == P2P_MAX_CHANNELS)
1664 break;
1665 for (j = 0; j < c->channels; j++) {
1666 int freq;
1667 if (freqs + 1 == P2P_MAX_CHANNELS)
1668 break;
1669 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]);
1670 if (freq < 0)
1671 continue;
1672 res.freq_list[freqs++] = freq;
1673 }
1674 }
1675
1676 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1677
1678 p2p_clear_timeout(p2p);
1679 p2p->ssid_set = 0;
1680 peer->go_neg_req_sent = 0;
1681 peer->wps_method = WPS_NOT_READY;
1682 peer->oob_pw_id = 0;
1683 wpabuf_free(peer->go_neg_conf);
1684 peer->go_neg_conf = NULL;
1685
1686 p2p_set_state(p2p, P2P_PROVISIONING);
1687 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1688 }
1689
1690
p2p_rx_p2p_action(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len,int rx_freq)1691 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1692 const u8 *data, size_t len, int rx_freq)
1693 {
1694 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1695 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1696
1697 if (len < 1)
1698 return;
1699
1700 switch (data[0]) {
1701 case P2P_GO_NEG_REQ:
1702 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1703 break;
1704 case P2P_GO_NEG_RESP:
1705 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1706 break;
1707 case P2P_GO_NEG_CONF:
1708 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1709 break;
1710 case P2P_INVITATION_REQ:
1711 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1712 rx_freq);
1713 break;
1714 case P2P_INVITATION_RESP:
1715 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
1716 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1717 break;
1718 case P2P_PROV_DISC_REQ:
1719 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1720 break;
1721 case P2P_PROV_DISC_RESP:
1722 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1723 break;
1724 case P2P_DEV_DISC_REQ:
1725 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1726 break;
1727 case P2P_DEV_DISC_RESP:
1728 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1729 break;
1730 default:
1731 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1732 data[0]);
1733 break;
1734 }
1735 }
1736
1737
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)1738 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1739 const u8 *sa, const u8 *bssid, const u8 *data,
1740 size_t len, int freq)
1741 {
1742 if (len < 1)
1743 return;
1744
1745 switch (data[0]) {
1746 case WLAN_PA_VENDOR_SPECIFIC:
1747 data++;
1748 len--;
1749 if (len < 4)
1750 return;
1751 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1752 return;
1753
1754 data += 4;
1755 len -= 4;
1756
1757 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1758 break;
1759 case WLAN_PA_GAS_INITIAL_REQ:
1760 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1761 break;
1762 case WLAN_PA_GAS_INITIAL_RESP:
1763 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1764 break;
1765 case WLAN_PA_GAS_COMEBACK_REQ:
1766 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1767 break;
1768 case WLAN_PA_GAS_COMEBACK_RESP:
1769 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1770 break;
1771 }
1772 }
1773
1774
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)1775 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1776 const u8 *bssid, u8 category,
1777 const u8 *data, size_t len, int freq)
1778 {
1779 if (category == WLAN_ACTION_PUBLIC) {
1780 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1781 return;
1782 }
1783
1784 if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1785 return;
1786
1787 if (len < 4)
1788 return;
1789
1790 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1791 return;
1792 data += 4;
1793 len -= 4;
1794
1795 /* P2P action frame */
1796 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1797 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1798
1799 if (len < 1)
1800 return;
1801 switch (data[0]) {
1802 case P2P_NOA:
1803 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1804 /* TODO */
1805 break;
1806 case P2P_PRESENCE_REQ:
1807 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1808 break;
1809 case P2P_PRESENCE_RESP:
1810 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1811 break;
1812 case P2P_GO_DISC_REQ:
1813 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1814 break;
1815 default:
1816 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1817 break;
1818 }
1819 }
1820
1821
p2p_go_neg_start(void * eloop_ctx,void * timeout_ctx)1822 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1823 {
1824 struct p2p_data *p2p = eloop_ctx;
1825 if (p2p->go_neg_peer == NULL)
1826 return;
1827 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1828 p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1829 p2p_connect_send(p2p, p2p->go_neg_peer);
1830 }
1831
1832
p2p_invite_start(void * eloop_ctx,void * timeout_ctx)1833 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1834 {
1835 struct p2p_data *p2p = eloop_ctx;
1836 if (p2p->invite_peer == NULL)
1837 return;
1838 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1839 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1840 p2p->invite_dev_pw_id);
1841 }
1842
1843
p2p_add_dev_from_probe_req(struct p2p_data * p2p,const u8 * addr,const u8 * ie,size_t ie_len)1844 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1845 const u8 *ie, size_t ie_len)
1846 {
1847 struct p2p_message msg;
1848 struct p2p_device *dev;
1849
1850 os_memset(&msg, 0, sizeof(msg));
1851 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1852 {
1853 p2p_parse_free(&msg);
1854 return; /* not a P2P probe */
1855 }
1856
1857 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1858 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1859 != 0) {
1860 /* The Probe Request is not part of P2P Device Discovery. It is
1861 * not known whether the source address of the frame is the P2P
1862 * Device Address or P2P Interface Address. Do not add a new
1863 * peer entry based on this frames.
1864 */
1865 p2p_parse_free(&msg);
1866 return;
1867 }
1868
1869 dev = p2p_get_device(p2p, addr);
1870 if (dev) {
1871 if (dev->country[0] == 0 && msg.listen_channel)
1872 os_memcpy(dev->country, msg.listen_channel, 3);
1873 os_get_reltime(&dev->last_seen);
1874 p2p_parse_free(&msg);
1875 return; /* already known */
1876 }
1877
1878 dev = p2p_create_device(p2p, addr);
1879 if (dev == NULL) {
1880 p2p_parse_free(&msg);
1881 return;
1882 }
1883
1884 os_get_reltime(&dev->last_seen);
1885 dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1886
1887 if (msg.listen_channel) {
1888 os_memcpy(dev->country, msg.listen_channel, 3);
1889 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
1890 msg.listen_channel[4]);
1891 }
1892
1893 p2p_copy_wps_info(p2p, dev, 1, &msg);
1894
1895 if (msg.wfd_subelems) {
1896 wpabuf_free(dev->info.wfd_subelems);
1897 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1898 }
1899
1900 p2p_parse_free(&msg);
1901
1902 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
1903 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1904 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1905 dev->info.group_capab, dev->info.device_name,
1906 dev->listen_freq);
1907 }
1908
1909
p2p_add_dev_from_go_neg_req(struct p2p_data * p2p,const u8 * addr,struct p2p_message * msg)1910 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1911 const u8 *addr,
1912 struct p2p_message *msg)
1913 {
1914 struct p2p_device *dev;
1915
1916 dev = p2p_get_device(p2p, addr);
1917 if (dev) {
1918 os_get_reltime(&dev->last_seen);
1919 return dev; /* already known */
1920 }
1921
1922 dev = p2p_create_device(p2p, addr);
1923 if (dev == NULL)
1924 return NULL;
1925
1926 p2p_add_dev_info(p2p, addr, dev, msg);
1927
1928 return dev;
1929 }
1930
1931
dev_type_match(const u8 * dev_type,const u8 * req_dev_type)1932 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1933 {
1934 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1935 return 1;
1936 if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1937 WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1938 WPA_GET_BE16(&req_dev_type[6]) == 0)
1939 return 1; /* Category match with wildcard OUI/sub-category */
1940 return 0;
1941 }
1942
1943
dev_type_list_match(const u8 * dev_type,const u8 * req_dev_type[],size_t num_req_dev_type)1944 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1945 size_t num_req_dev_type)
1946 {
1947 size_t i;
1948 for (i = 0; i < num_req_dev_type; i++) {
1949 if (dev_type_match(dev_type, req_dev_type[i]))
1950 return 1;
1951 }
1952 return 0;
1953 }
1954
1955
1956 /**
1957 * p2p_match_dev_type - Match local device type with requested type
1958 * @p2p: P2P module context from p2p_init()
1959 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1960 * Returns: 1 on match, 0 on mismatch
1961 *
1962 * This function can be used to match the Requested Device Type attribute in
1963 * WPS IE with the local device types for deciding whether to reply to a Probe
1964 * Request frame.
1965 */
p2p_match_dev_type(struct p2p_data * p2p,struct wpabuf * wps)1966 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
1967 {
1968 struct wps_parse_attr attr;
1969 size_t i;
1970
1971 if (wps_parse_msg(wps, &attr))
1972 return 1; /* assume no Requested Device Type attributes */
1973
1974 if (attr.num_req_dev_type == 0)
1975 return 1; /* no Requested Device Type attributes -> match */
1976
1977 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
1978 attr.num_req_dev_type))
1979 return 1; /* Own Primary Device Type matches */
1980
1981 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
1982 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
1983 attr.req_dev_type,
1984 attr.num_req_dev_type))
1985 return 1; /* Own Secondary Device Type matches */
1986
1987 /* No matching device type found */
1988 return 0;
1989 }
1990
1991
p2p_build_probe_resp_ies(struct p2p_data * p2p)1992 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
1993 {
1994 struct wpabuf *buf;
1995 u8 *len;
1996 int pw_id = -1;
1997 size_t extra = 0;
1998
1999 #ifdef CONFIG_WIFI_DISPLAY
2000 if (p2p->wfd_ie_probe_resp)
2001 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2002 #endif /* CONFIG_WIFI_DISPLAY */
2003
2004 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2005 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2006
2007 buf = wpabuf_alloc(1000 + extra);
2008 if (buf == NULL)
2009 return NULL;
2010
2011 if (p2p->go_neg_peer) {
2012 /* Advertise immediate availability of WPS credential */
2013 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2014 }
2015
2016 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2017 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2018 wpabuf_free(buf);
2019 return NULL;
2020 }
2021
2022 #ifdef CONFIG_WIFI_DISPLAY
2023 if (p2p->wfd_ie_probe_resp)
2024 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2025 #endif /* CONFIG_WIFI_DISPLAY */
2026
2027 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2028 wpabuf_put_buf(buf,
2029 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2030
2031 /* P2P IE */
2032 len = p2p_buf_add_ie_hdr(buf);
2033 p2p_buf_add_capability(buf, p2p->dev_capab &
2034 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2035 if (p2p->ext_listen_interval)
2036 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2037 p2p->ext_listen_interval);
2038 p2p_buf_add_device_info(buf, p2p, NULL);
2039 p2p_buf_update_ie_hdr(buf, len);
2040
2041 return buf;
2042 }
2043
2044
2045 static enum p2p_probe_req_status
p2p_reply_probe(struct p2p_data * p2p,const u8 * addr,const u8 * dst,const u8 * bssid,const u8 * ie,size_t ie_len)2046 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2047 const u8 *bssid, const u8 *ie, size_t ie_len)
2048 {
2049 struct ieee802_11_elems elems;
2050 struct wpabuf *buf;
2051 struct ieee80211_mgmt *resp;
2052 struct p2p_message msg;
2053 struct wpabuf *ies;
2054
2055 if (!p2p->in_listen || !p2p->drv_in_listen) {
2056 /* not in Listen state - ignore Probe Request */
2057 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2058 p2p->in_listen, p2p->drv_in_listen);
2059 return P2P_PREQ_NOT_LISTEN;
2060 }
2061
2062 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2063 ParseFailed) {
2064 /* Ignore invalid Probe Request frames */
2065 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2066 return P2P_PREQ_MALFORMED;
2067 }
2068
2069 if (elems.p2p == NULL) {
2070 /* not a P2P probe - ignore it */
2071 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2072 return P2P_PREQ_NOT_P2P;
2073 }
2074
2075 if (dst && !is_broadcast_ether_addr(dst) &&
2076 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2077 /* Not sent to the broadcast address or our P2P Device Address
2078 */
2079 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2080 MAC2STR(dst));
2081 return P2P_PREQ_NOT_PROCESSED;
2082 }
2083
2084 if (bssid && !is_broadcast_ether_addr(bssid)) {
2085 /* Not sent to the Wildcard BSSID */
2086 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2087 MAC2STR(bssid));
2088 return P2P_PREQ_NOT_PROCESSED;
2089 }
2090
2091 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2092 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2093 0) {
2094 /* not using P2P Wildcard SSID - ignore */
2095 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2096 return P2P_PREQ_NOT_PROCESSED;
2097 }
2098
2099 if (supp_rates_11b_only(&elems)) {
2100 /* Indicates support for 11b rates only */
2101 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2102 return P2P_PREQ_NOT_P2P;
2103 }
2104
2105 os_memset(&msg, 0, sizeof(msg));
2106 if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2107 /* Could not parse P2P attributes */
2108 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2109 return P2P_PREQ_NOT_P2P;
2110 }
2111
2112 if (msg.device_id &&
2113 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2114 /* Device ID did not match */
2115 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2116 MAC2STR(msg.device_id));
2117 p2p_parse_free(&msg);
2118 return P2P_PREQ_NOT_PROCESSED;
2119 }
2120
2121 /* Check Requested Device Type match */
2122 if (msg.wps_attributes &&
2123 !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2124 /* No match with Requested Device Type */
2125 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2126 p2p_parse_free(&msg);
2127 return P2P_PREQ_NOT_PROCESSED;
2128 }
2129 p2p_parse_free(&msg);
2130
2131 if (!p2p->cfg->send_probe_resp) {
2132 /* Response generated elsewhere */
2133 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2134 return P2P_PREQ_NOT_PROCESSED;
2135 }
2136
2137 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2138
2139 /*
2140 * We do not really have a specific BSS that this frame is advertising,
2141 * so build a frame that has some information in valid format. This is
2142 * really only used for discovery purposes, not to learn exact BSS
2143 * parameters.
2144 */
2145 ies = p2p_build_probe_resp_ies(p2p);
2146 if (ies == NULL)
2147 return P2P_PREQ_NOT_PROCESSED;
2148
2149 buf = wpabuf_alloc(200 + wpabuf_len(ies));
2150 if (buf == NULL) {
2151 wpabuf_free(ies);
2152 return P2P_PREQ_NOT_PROCESSED;
2153 }
2154
2155 resp = NULL;
2156 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2157
2158 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2159 (WLAN_FC_STYPE_PROBE_RESP << 4));
2160 os_memcpy(resp->da, addr, ETH_ALEN);
2161 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2162 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2163 resp->u.probe_resp.beacon_int = host_to_le16(100);
2164 /* hardware or low-level driver will setup seq_ctrl and timestamp */
2165 resp->u.probe_resp.capab_info =
2166 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2167 WLAN_CAPABILITY_PRIVACY |
2168 WLAN_CAPABILITY_SHORT_SLOT_TIME);
2169
2170 wpabuf_put_u8(buf, WLAN_EID_SSID);
2171 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2172 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2173
2174 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2175 wpabuf_put_u8(buf, 8);
2176 wpabuf_put_u8(buf, (60 / 5) | 0x80);
2177 wpabuf_put_u8(buf, 90 / 5);
2178 wpabuf_put_u8(buf, (120 / 5) | 0x80);
2179 wpabuf_put_u8(buf, 180 / 5);
2180 wpabuf_put_u8(buf, (240 / 5) | 0x80);
2181 wpabuf_put_u8(buf, 360 / 5);
2182 wpabuf_put_u8(buf, 480 / 5);
2183 wpabuf_put_u8(buf, 540 / 5);
2184
2185 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2186 wpabuf_put_u8(buf, 1);
2187 wpabuf_put_u8(buf, p2p->cfg->channel);
2188
2189 wpabuf_put_buf(buf, ies);
2190 wpabuf_free(ies);
2191
2192 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2193
2194 wpabuf_free(buf);
2195
2196 return P2P_PREQ_NOT_PROCESSED;
2197 }
2198
2199
2200 enum p2p_probe_req_status
p2p_probe_req_rx(struct p2p_data * p2p,const u8 * addr,const u8 * dst,const u8 * bssid,const u8 * ie,size_t ie_len)2201 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2202 const u8 *bssid, const u8 *ie, size_t ie_len)
2203 {
2204 enum p2p_probe_req_status res;
2205
2206 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2207
2208 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2209
2210 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2211 p2p->go_neg_peer &&
2212 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2213 == 0 &&
2214 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2215 /* Received a Probe Request from GO Negotiation peer */
2216 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2217 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2218 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2219 return P2P_PREQ_PROCESSED;
2220 }
2221
2222 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2223 p2p->invite_peer &&
2224 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2225 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2226 == 0) {
2227 /* Received a Probe Request from Invite peer */
2228 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2229 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2230 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2231 return P2P_PREQ_PROCESSED;
2232 }
2233
2234 return res;
2235 }
2236
2237
p2p_assoc_req_ie_wlan_ap(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,struct wpabuf * p2p_ie)2238 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2239 u8 *buf, size_t len, struct wpabuf *p2p_ie)
2240 {
2241 struct wpabuf *tmp;
2242 u8 *lpos;
2243 size_t tmplen;
2244 int res;
2245 u8 group_capab;
2246
2247 if (p2p_ie == NULL)
2248 return 0; /* WLAN AP is not a P2P manager */
2249
2250 /*
2251 * (Re)Association Request - P2P IE
2252 * P2P Capability attribute (shall be present)
2253 * P2P Interface attribute (present if concurrent device and
2254 * P2P Management is enabled)
2255 */
2256 tmp = wpabuf_alloc(200);
2257 if (tmp == NULL)
2258 return -1;
2259
2260 lpos = p2p_buf_add_ie_hdr(tmp);
2261 group_capab = 0;
2262 if (p2p->num_groups > 0) {
2263 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2264 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2265 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2266 p2p->cross_connect)
2267 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2268 }
2269 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2270 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2271 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2272 p2p_buf_add_p2p_interface(tmp, p2p);
2273 p2p_buf_update_ie_hdr(tmp, lpos);
2274
2275 tmplen = wpabuf_len(tmp);
2276 if (tmplen > len)
2277 res = -1;
2278 else {
2279 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2280 res = tmplen;
2281 }
2282 wpabuf_free(tmp);
2283
2284 return res;
2285 }
2286
2287
p2p_assoc_req_ie(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,int p2p_group,struct wpabuf * p2p_ie)2288 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2289 size_t len, int p2p_group, struct wpabuf *p2p_ie)
2290 {
2291 struct wpabuf *tmp;
2292 u8 *lpos;
2293 struct p2p_device *peer;
2294 size_t tmplen;
2295 int res;
2296 size_t extra = 0;
2297
2298 if (!p2p_group)
2299 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2300
2301 #ifdef CONFIG_WIFI_DISPLAY
2302 if (p2p->wfd_ie_assoc_req)
2303 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2304 #endif /* CONFIG_WIFI_DISPLAY */
2305
2306 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2307 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2308
2309 /*
2310 * (Re)Association Request - P2P IE
2311 * P2P Capability attribute (shall be present)
2312 * Extended Listen Timing (may be present)
2313 * P2P Device Info attribute (shall be present)
2314 */
2315 tmp = wpabuf_alloc(200 + extra);
2316 if (tmp == NULL)
2317 return -1;
2318
2319 #ifdef CONFIG_WIFI_DISPLAY
2320 if (p2p->wfd_ie_assoc_req)
2321 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2322 #endif /* CONFIG_WIFI_DISPLAY */
2323
2324 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2325 wpabuf_put_buf(tmp,
2326 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2327
2328 peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2329
2330 lpos = p2p_buf_add_ie_hdr(tmp);
2331 p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2332 if (p2p->ext_listen_interval)
2333 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2334 p2p->ext_listen_interval);
2335 p2p_buf_add_device_info(tmp, p2p, peer);
2336 p2p_buf_update_ie_hdr(tmp, lpos);
2337
2338 tmplen = wpabuf_len(tmp);
2339 if (tmplen > len)
2340 res = -1;
2341 else {
2342 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2343 res = tmplen;
2344 }
2345 wpabuf_free(tmp);
2346
2347 return res;
2348 }
2349
2350
p2p_scan_result_text(const u8 * ies,size_t ies_len,char * buf,char * end)2351 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2352 {
2353 struct wpabuf *p2p_ie;
2354 int ret;
2355
2356 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2357 if (p2p_ie == NULL)
2358 return 0;
2359
2360 ret = p2p_attr_text(p2p_ie, buf, end);
2361 wpabuf_free(p2p_ie);
2362 return ret;
2363 }
2364
2365
p2p_parse_dev_addr_in_p2p_ie(struct wpabuf * p2p_ie,u8 * dev_addr)2366 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2367 {
2368 struct p2p_message msg;
2369
2370 os_memset(&msg, 0, sizeof(msg));
2371 if (p2p_parse_p2p_ie(p2p_ie, &msg))
2372 return -1;
2373
2374 if (msg.p2p_device_addr) {
2375 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2376 return 0;
2377 } else if (msg.device_id) {
2378 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2379 return 0;
2380 }
2381 return -1;
2382 }
2383
2384
p2p_parse_dev_addr(const u8 * ies,size_t ies_len,u8 * dev_addr)2385 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2386 {
2387 struct wpabuf *p2p_ie;
2388 int ret;
2389
2390 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2391 P2P_IE_VENDOR_TYPE);
2392 if (p2p_ie == NULL)
2393 return -1;
2394 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2395 wpabuf_free(p2p_ie);
2396 return ret;
2397 }
2398
2399
p2p_clear_go_neg(struct p2p_data * p2p)2400 static void p2p_clear_go_neg(struct p2p_data *p2p)
2401 {
2402 p2p->go_neg_peer = NULL;
2403 p2p_clear_timeout(p2p);
2404 p2p_set_state(p2p, P2P_IDLE);
2405 }
2406
2407
p2p_wps_success_cb(struct p2p_data * p2p,const u8 * mac_addr)2408 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2409 {
2410 if (p2p->go_neg_peer == NULL) {
2411 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2412 return; /* No pending Group Formation */
2413 }
2414
2415 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2416 0) {
2417 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2418 MACSTR " (GO Negotiation peer " MACSTR ")",
2419 MAC2STR(mac_addr),
2420 MAC2STR(p2p->go_neg_peer->intended_addr));
2421 return; /* Ignore unexpected peer address */
2422 }
2423
2424 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2425 MAC2STR(mac_addr));
2426
2427 p2p_clear_go_neg(p2p);
2428 }
2429
2430
p2p_group_formation_failed(struct p2p_data * p2p)2431 void p2p_group_formation_failed(struct p2p_data *p2p)
2432 {
2433 if (p2p->go_neg_peer == NULL) {
2434 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2435 return; /* No pending Group Formation */
2436 }
2437
2438 p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2439 MAC2STR(p2p->go_neg_peer->intended_addr));
2440
2441 p2p_clear_go_neg(p2p);
2442 }
2443
2444
p2p_init(const struct p2p_config * cfg)2445 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2446 {
2447 struct p2p_data *p2p;
2448
2449 if (cfg->max_peers < 1 ||
2450 cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2451 return NULL;
2452
2453 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2454 if (p2p == NULL)
2455 return NULL;
2456 p2p->cfg = (struct p2p_config *) (p2p + 1);
2457 os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2458 if (cfg->dev_name)
2459 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2460 if (cfg->manufacturer)
2461 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2462 if (cfg->model_name)
2463 p2p->cfg->model_name = os_strdup(cfg->model_name);
2464 if (cfg->model_number)
2465 p2p->cfg->model_number = os_strdup(cfg->model_number);
2466 if (cfg->serial_number)
2467 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2468 if (cfg->pref_chan) {
2469 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2470 sizeof(struct p2p_channel));
2471 if (p2p->cfg->pref_chan) {
2472 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2473 cfg->num_pref_chan *
2474 sizeof(struct p2p_channel));
2475 } else
2476 p2p->cfg->num_pref_chan = 0;
2477 }
2478
2479 p2p->min_disc_int = 1;
2480 p2p->max_disc_int = 3;
2481 p2p->max_disc_tu = -1;
2482
2483 os_get_random(&p2p->next_tie_breaker, 1);
2484 p2p->next_tie_breaker &= 0x01;
2485 if (cfg->sd_request)
2486 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2487 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2488 if (cfg->concurrent_operations)
2489 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2490 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2491
2492 dl_list_init(&p2p->devices);
2493
2494 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2495 p2p_expiration_timeout, p2p, NULL);
2496
2497 p2p->go_timeout = 100;
2498 p2p->client_timeout = 20;
2499 p2p->num_p2p_sd_queries = 0;
2500
2501 p2p_dbg(p2p, "initialized");
2502 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2503 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2504
2505 return p2p;
2506 }
2507
2508
p2p_deinit(struct p2p_data * p2p)2509 void p2p_deinit(struct p2p_data *p2p)
2510 {
2511 #ifdef CONFIG_WIFI_DISPLAY
2512 wpabuf_free(p2p->wfd_ie_beacon);
2513 wpabuf_free(p2p->wfd_ie_probe_req);
2514 wpabuf_free(p2p->wfd_ie_probe_resp);
2515 wpabuf_free(p2p->wfd_ie_assoc_req);
2516 wpabuf_free(p2p->wfd_ie_invitation);
2517 wpabuf_free(p2p->wfd_ie_prov_disc_req);
2518 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2519 wpabuf_free(p2p->wfd_ie_go_neg);
2520 wpabuf_free(p2p->wfd_dev_info);
2521 wpabuf_free(p2p->wfd_assoc_bssid);
2522 wpabuf_free(p2p->wfd_coupled_sink_info);
2523 #endif /* CONFIG_WIFI_DISPLAY */
2524
2525 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2526 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2527 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2528 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2529 p2p_flush(p2p);
2530 p2p_free_req_dev_types(p2p);
2531 os_free(p2p->cfg->dev_name);
2532 os_free(p2p->cfg->manufacturer);
2533 os_free(p2p->cfg->model_name);
2534 os_free(p2p->cfg->model_number);
2535 os_free(p2p->cfg->serial_number);
2536 os_free(p2p->cfg->pref_chan);
2537 os_free(p2p->groups);
2538 wpabuf_free(p2p->sd_resp);
2539 os_free(p2p->after_scan_tx);
2540 p2p_remove_wps_vendor_extensions(p2p);
2541 os_free(p2p->no_go_freq.range);
2542 os_free(p2p);
2543 }
2544
2545
p2p_flush(struct p2p_data * p2p)2546 void p2p_flush(struct p2p_data *p2p)
2547 {
2548 struct p2p_device *dev, *prev;
2549 p2p_stop_find(p2p);
2550 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2551 list) {
2552 dl_list_del(&dev->list);
2553 p2p_device_free(p2p, dev);
2554 }
2555 p2p_free_sd_queries(p2p);
2556 os_free(p2p->after_scan_tx);
2557 p2p->after_scan_tx = NULL;
2558 }
2559
2560
p2p_unauthorize(struct p2p_data * p2p,const u8 * addr)2561 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2562 {
2563 struct p2p_device *dev;
2564
2565 dev = p2p_get_device(p2p, addr);
2566 if (dev == NULL)
2567 return -1;
2568
2569 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2570
2571 if (p2p->go_neg_peer == dev)
2572 p2p->go_neg_peer = NULL;
2573
2574 dev->wps_method = WPS_NOT_READY;
2575 dev->oob_pw_id = 0;
2576 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2577 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2578
2579 /* Check if after_scan_tx is for this peer. If so free it */
2580 if (p2p->after_scan_tx &&
2581 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2582 os_free(p2p->after_scan_tx);
2583 p2p->after_scan_tx = NULL;
2584 }
2585
2586 return 0;
2587 }
2588
2589
p2p_set_dev_name(struct p2p_data * p2p,const char * dev_name)2590 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2591 {
2592 os_free(p2p->cfg->dev_name);
2593 if (dev_name) {
2594 p2p->cfg->dev_name = os_strdup(dev_name);
2595 if (p2p->cfg->dev_name == NULL)
2596 return -1;
2597 } else
2598 p2p->cfg->dev_name = NULL;
2599 return 0;
2600 }
2601
2602
p2p_set_manufacturer(struct p2p_data * p2p,const char * manufacturer)2603 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2604 {
2605 os_free(p2p->cfg->manufacturer);
2606 p2p->cfg->manufacturer = NULL;
2607 if (manufacturer) {
2608 p2p->cfg->manufacturer = os_strdup(manufacturer);
2609 if (p2p->cfg->manufacturer == NULL)
2610 return -1;
2611 }
2612
2613 return 0;
2614 }
2615
2616
p2p_set_model_name(struct p2p_data * p2p,const char * model_name)2617 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2618 {
2619 os_free(p2p->cfg->model_name);
2620 p2p->cfg->model_name = NULL;
2621 if (model_name) {
2622 p2p->cfg->model_name = os_strdup(model_name);
2623 if (p2p->cfg->model_name == NULL)
2624 return -1;
2625 }
2626
2627 return 0;
2628 }
2629
2630
p2p_set_model_number(struct p2p_data * p2p,const char * model_number)2631 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2632 {
2633 os_free(p2p->cfg->model_number);
2634 p2p->cfg->model_number = NULL;
2635 if (model_number) {
2636 p2p->cfg->model_number = os_strdup(model_number);
2637 if (p2p->cfg->model_number == NULL)
2638 return -1;
2639 }
2640
2641 return 0;
2642 }
2643
2644
p2p_set_serial_number(struct p2p_data * p2p,const char * serial_number)2645 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2646 {
2647 os_free(p2p->cfg->serial_number);
2648 p2p->cfg->serial_number = NULL;
2649 if (serial_number) {
2650 p2p->cfg->serial_number = os_strdup(serial_number);
2651 if (p2p->cfg->serial_number == NULL)
2652 return -1;
2653 }
2654
2655 return 0;
2656 }
2657
2658
p2p_set_config_methods(struct p2p_data * p2p,u16 config_methods)2659 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2660 {
2661 p2p->cfg->config_methods = config_methods;
2662 }
2663
2664
p2p_set_uuid(struct p2p_data * p2p,const u8 * uuid)2665 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2666 {
2667 os_memcpy(p2p->cfg->uuid, uuid, 16);
2668 }
2669
2670
p2p_set_pri_dev_type(struct p2p_data * p2p,const u8 * pri_dev_type)2671 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2672 {
2673 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2674 return 0;
2675 }
2676
2677
p2p_set_sec_dev_types(struct p2p_data * p2p,const u8 dev_types[][8],size_t num_dev_types)2678 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2679 size_t num_dev_types)
2680 {
2681 if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2682 num_dev_types = P2P_SEC_DEVICE_TYPES;
2683 p2p->cfg->num_sec_dev_types = num_dev_types;
2684 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2685 return 0;
2686 }
2687
2688
p2p_remove_wps_vendor_extensions(struct p2p_data * p2p)2689 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2690 {
2691 int i;
2692
2693 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2694 wpabuf_free(p2p->wps_vendor_ext[i]);
2695 p2p->wps_vendor_ext[i] = NULL;
2696 }
2697 }
2698
2699
p2p_add_wps_vendor_extension(struct p2p_data * p2p,const struct wpabuf * vendor_ext)2700 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2701 const struct wpabuf *vendor_ext)
2702 {
2703 int i;
2704
2705 if (vendor_ext == NULL)
2706 return -1;
2707
2708 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2709 if (p2p->wps_vendor_ext[i] == NULL)
2710 break;
2711 }
2712 if (i >= P2P_MAX_WPS_VENDOR_EXT)
2713 return -1;
2714
2715 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2716 if (p2p->wps_vendor_ext[i] == NULL)
2717 return -1;
2718
2719 return 0;
2720 }
2721
2722
p2p_set_country(struct p2p_data * p2p,const char * country)2723 int p2p_set_country(struct p2p_data *p2p, const char *country)
2724 {
2725 os_memcpy(p2p->cfg->country, country, 3);
2726 return 0;
2727 }
2728
2729
p2p_continue_find(struct p2p_data * p2p)2730 void p2p_continue_find(struct p2p_data *p2p)
2731 {
2732 struct p2p_device *dev;
2733 p2p_set_state(p2p, P2P_SEARCH);
2734 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2735 if (dev->sd_pending_bcast_queries == 0) {
2736 /* Initialize with total number of registered broadcast
2737 * SD queries. */
2738 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
2739 }
2740
2741 if (p2p_start_sd(p2p, dev) == 0)
2742 return;
2743 if (dev->req_config_methods &&
2744 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2745 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2746 MACSTR " (config methods 0x%x)",
2747 MAC2STR(dev->info.p2p_device_addr),
2748 dev->req_config_methods);
2749 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2750 return;
2751 }
2752 }
2753
2754 p2p_listen_in_find(p2p, 1);
2755 }
2756
2757
p2p_sd_cb(struct p2p_data * p2p,int success)2758 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2759 {
2760 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
2761 success);
2762 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2763
2764 if (!success) {
2765 p2p->sd_peer = NULL;
2766 p2p_continue_find(p2p);
2767 return;
2768 }
2769
2770 if (p2p->sd_peer == NULL) {
2771 p2p_dbg(p2p, "No SD peer entry known");
2772 p2p_continue_find(p2p);
2773 return;
2774 }
2775
2776 /* Wait for response from the peer */
2777 p2p_set_state(p2p, P2P_SD_DURING_FIND);
2778 p2p_set_timeout(p2p, 0, 200000);
2779 }
2780
2781
2782 /**
2783 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2784 * @p2p: P2P module context from p2p_init()
2785 */
p2p_retry_pd(struct p2p_data * p2p)2786 static void p2p_retry_pd(struct p2p_data *p2p)
2787 {
2788 struct p2p_device *dev;
2789
2790 if (p2p->state != P2P_IDLE)
2791 return;
2792
2793 /*
2794 * Retry the prov disc req attempt only for the peer that the user had
2795 * requested.
2796 */
2797
2798 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2799 if (os_memcmp(p2p->pending_pd_devaddr,
2800 dev->info.p2p_device_addr, ETH_ALEN) != 0)
2801 continue;
2802 if (!dev->req_config_methods)
2803 continue;
2804
2805 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2806 MACSTR " (config methods 0x%x)",
2807 MAC2STR(dev->info.p2p_device_addr),
2808 dev->req_config_methods);
2809 p2p_send_prov_disc_req(p2p, dev,
2810 dev->flags & P2P_DEV_PD_FOR_JOIN,
2811 p2p->pd_force_freq);
2812 return;
2813 }
2814 }
2815
2816
p2p_prov_disc_cb(struct p2p_data * p2p,int success)2817 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2818 {
2819 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
2820 success);
2821
2822 /*
2823 * Postpone resetting the pending action state till after we actually
2824 * time out. This allows us to take some action like notifying any
2825 * interested parties about no response to the request.
2826 *
2827 * When the timer (below) goes off we check in IDLE, SEARCH, or
2828 * LISTEN_ONLY state, which are the only allowed states to issue a PD
2829 * requests in, if this was still pending and then raise notification.
2830 */
2831
2832 if (!success) {
2833 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2834
2835 if (p2p->user_initiated_pd &&
2836 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2837 {
2838 /* Retry request from timeout to avoid busy loops */
2839 p2p->pending_action_state = P2P_PENDING_PD;
2840 p2p_set_timeout(p2p, 0, 50000);
2841 } else if (p2p->state != P2P_IDLE)
2842 p2p_continue_find(p2p);
2843 else if (p2p->user_initiated_pd) {
2844 p2p->pending_action_state = P2P_PENDING_PD;
2845 p2p_set_timeout(p2p, 0, 300000);
2846 }
2847 return;
2848 }
2849
2850 /*
2851 * This postponing, of resetting pending_action_state, needs to be
2852 * done only for user initiated PD requests and not internal ones.
2853 */
2854 if (p2p->user_initiated_pd)
2855 p2p->pending_action_state = P2P_PENDING_PD;
2856 else
2857 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2858
2859 /* Wait for response from the peer */
2860 if (p2p->state == P2P_SEARCH)
2861 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2862 p2p_set_timeout(p2p, 0, 200000);
2863 }
2864
2865
p2p_scan_res_handler(struct p2p_data * p2p,const u8 * bssid,int freq,struct os_reltime * rx_time,int level,const u8 * ies,size_t ies_len)2866 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2867 struct os_reltime *rx_time, int level, const u8 *ies,
2868 size_t ies_len)
2869 {
2870 if (os_reltime_before(rx_time, &p2p->find_start)) {
2871 /*
2872 * The driver may have cached (e.g., in cfg80211 BSS table) the
2873 * scan results for relatively long time. To avoid reporting
2874 * stale information, update P2P peers only based on results
2875 * that have based on frames received after the last p2p_find
2876 * operation was started.
2877 */
2878 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
2879 " (rx_time=%u.%06u)",
2880 MAC2STR(bssid), (unsigned int) rx_time->sec,
2881 (unsigned int) rx_time->usec);
2882 return 0;
2883 }
2884
2885 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
2886
2887 return 0;
2888 }
2889
2890
p2p_scan_res_handled(struct p2p_data * p2p)2891 void p2p_scan_res_handled(struct p2p_data *p2p)
2892 {
2893 if (!p2p->p2p_scan_running) {
2894 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
2895 }
2896 p2p->p2p_scan_running = 0;
2897 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2898
2899 if (p2p_run_after_scan(p2p))
2900 return;
2901 if (p2p->state == P2P_SEARCH)
2902 p2p_continue_find(p2p);
2903 }
2904
2905
p2p_scan_ie(struct p2p_data * p2p,struct wpabuf * ies,const u8 * dev_id)2906 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2907 {
2908 u8 *len;
2909
2910 #ifdef CONFIG_WIFI_DISPLAY
2911 if (p2p->wfd_ie_probe_req)
2912 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
2913 #endif /* CONFIG_WIFI_DISPLAY */
2914
2915 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
2916 wpabuf_put_buf(ies,
2917 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
2918
2919 len = p2p_buf_add_ie_hdr(ies);
2920 p2p_buf_add_capability(ies, p2p->dev_capab &
2921 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2922 if (dev_id)
2923 p2p_buf_add_device_id(ies, dev_id);
2924 if (p2p->cfg->reg_class && p2p->cfg->channel)
2925 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
2926 p2p->cfg->reg_class,
2927 p2p->cfg->channel);
2928 if (p2p->ext_listen_interval)
2929 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
2930 p2p->ext_listen_interval);
2931 /* TODO: p2p_buf_add_operating_channel() if GO */
2932 p2p_buf_update_ie_hdr(ies, len);
2933 }
2934
2935
p2p_scan_ie_buf_len(struct p2p_data * p2p)2936 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
2937 {
2938 size_t len = 100;
2939
2940 #ifdef CONFIG_WIFI_DISPLAY
2941 if (p2p && p2p->wfd_ie_probe_req)
2942 len += wpabuf_len(p2p->wfd_ie_probe_req);
2943 #endif /* CONFIG_WIFI_DISPLAY */
2944
2945 if (p2p && p2p->vendor_elem &&
2946 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
2947 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
2948
2949 return len;
2950 }
2951
2952
p2p_ie_text(struct wpabuf * p2p_ie,char * buf,char * end)2953 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
2954 {
2955 return p2p_attr_text(p2p_ie, buf, end);
2956 }
2957
2958
p2p_go_neg_req_cb(struct p2p_data * p2p,int success)2959 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
2960 {
2961 struct p2p_device *dev = p2p->go_neg_peer;
2962 int timeout;
2963
2964 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
2965
2966 if (dev == NULL) {
2967 p2p_dbg(p2p, "No pending GO Negotiation");
2968 return;
2969 }
2970
2971 if (success) {
2972 if (dev->flags & P2P_DEV_USER_REJECTED) {
2973 p2p_set_state(p2p, P2P_IDLE);
2974 return;
2975 }
2976 } else if (dev->go_neg_req_sent) {
2977 /* Cancel the increment from p2p_connect_send() on failure */
2978 dev->go_neg_req_sent--;
2979 }
2980
2981 if (!success &&
2982 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
2983 !is_zero_ether_addr(dev->member_in_go_dev)) {
2984 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
2985 MAC2STR(dev->info.p2p_device_addr));
2986 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2987 p2p_send_dev_disc_req(p2p, dev);
2988 return;
2989 }
2990
2991 /*
2992 * Use P2P find, if needed, to find the other device from its listen
2993 * channel.
2994 */
2995 p2p_set_state(p2p, P2P_CONNECT);
2996 timeout = success ? 500000 : 100000;
2997 if (!success && p2p->go_neg_peer &&
2998 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
2999 unsigned int r;
3000 /*
3001 * Peer is expected to wait our response and we will skip the
3002 * listen phase. Add some randomness to the wait time here to
3003 * make it less likely to hit cases where we could end up in
3004 * sync with peer not listening.
3005 */
3006 os_get_random((u8 *) &r, sizeof(r));
3007 timeout += r % 100000;
3008 }
3009 p2p_set_timeout(p2p, 0, timeout);
3010 }
3011
3012
p2p_go_neg_resp_cb(struct p2p_data * p2p,int success)3013 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3014 {
3015 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3016 success);
3017 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3018 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3019 return;
3020 }
3021 p2p_set_state(p2p, P2P_CONNECT);
3022 p2p_set_timeout(p2p, 0, 500000);
3023 }
3024
3025
p2p_go_neg_resp_failure_cb(struct p2p_data * p2p,int success,const u8 * addr)3026 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3027 const u8 *addr)
3028 {
3029 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3030 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3031 p2p_go_neg_failed(p2p, p2p->go_neg_peer,
3032 p2p->go_neg_peer->status);
3033 } else if (success) {
3034 struct p2p_device *dev;
3035 dev = p2p_get_device(p2p, addr);
3036 if (dev &&
3037 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) {
3038 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3039 if ((p2p->state == P2P_SEARCH) ||
3040 (p2p->state == P2P_LISTEN_ONLY)) {
3041 /* Clear our search state or Listen state since
3042 * now peer is awaiting response from our side.
3043 */
3044 p2p_dbg(p2p, "Clear the P2P discovery state");
3045 p2p_stop_find(p2p);
3046 }
3047 }
3048 }
3049 }
3050
3051
p2p_go_neg_conf_cb(struct p2p_data * p2p,enum p2p_send_action_result result)3052 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3053 enum p2p_send_action_result result)
3054 {
3055 struct p2p_device *dev;
3056
3057 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3058 if (result == P2P_SEND_ACTION_FAILED) {
3059 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3060 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3061 return;
3062 }
3063
3064 dev = p2p->go_neg_peer;
3065
3066 if (result == P2P_SEND_ACTION_NO_ACK) {
3067 /*
3068 * Retry GO Negotiation Confirmation
3069 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3070 * ACK for confirmation.
3071 */
3072 if (dev && dev->go_neg_conf &&
3073 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3074 p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3075 dev->go_neg_conf_sent);
3076 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3077 if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3078 dev->info.p2p_device_addr,
3079 p2p->cfg->dev_addr,
3080 dev->info.p2p_device_addr,
3081 wpabuf_head(dev->go_neg_conf),
3082 wpabuf_len(dev->go_neg_conf), 0) >=
3083 0) {
3084 dev->go_neg_conf_sent++;
3085 return;
3086 }
3087 p2p_dbg(p2p, "Failed to re-send Action frame");
3088
3089 /*
3090 * Continue with the assumption that the first attempt
3091 * went through and just the ACK frame was lost.
3092 */
3093 }
3094
3095 /*
3096 * It looks like the TX status for GO Negotiation Confirm is
3097 * often showing failure even when the peer has actually
3098 * received the frame. Since the peer may change channels
3099 * immediately after having received the frame, we may not see
3100 * an Ack for retries, so just dropping a single frame may
3101 * trigger this. To allow the group formation to succeed if the
3102 * peer did indeed receive the frame, continue regardless of
3103 * the TX status.
3104 */
3105 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3106 }
3107
3108 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3109
3110 if (dev == NULL)
3111 return;
3112
3113 p2p_go_complete(p2p, dev);
3114 }
3115
3116
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)3117 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3118 const u8 *src, const u8 *bssid,
3119 enum p2p_send_action_result result)
3120 {
3121 enum p2p_pending_action_state state;
3122 int success;
3123
3124 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3125 " src=" MACSTR " bssid=" MACSTR " result=%d",
3126 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3127 MAC2STR(bssid), result);
3128 success = result == P2P_SEND_ACTION_SUCCESS;
3129 state = p2p->pending_action_state;
3130 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3131 switch (state) {
3132 case P2P_NO_PENDING_ACTION:
3133 if (p2p->send_action_in_progress) {
3134 p2p->send_action_in_progress = 0;
3135 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3136 }
3137 if (p2p->after_scan_tx_in_progress) {
3138 p2p->after_scan_tx_in_progress = 0;
3139 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3140 p2p_run_after_scan(p2p))
3141 break;
3142 if (p2p->state == P2P_SEARCH) {
3143 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3144 p2p_continue_find(p2p);
3145 }
3146 }
3147 break;
3148 case P2P_PENDING_GO_NEG_REQUEST:
3149 p2p_go_neg_req_cb(p2p, success);
3150 break;
3151 case P2P_PENDING_GO_NEG_RESPONSE:
3152 p2p_go_neg_resp_cb(p2p, success);
3153 break;
3154 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3155 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3156 break;
3157 case P2P_PENDING_GO_NEG_CONFIRM:
3158 p2p_go_neg_conf_cb(p2p, result);
3159 break;
3160 case P2P_PENDING_SD:
3161 p2p_sd_cb(p2p, success);
3162 break;
3163 case P2P_PENDING_PD:
3164 p2p_prov_disc_cb(p2p, success);
3165 break;
3166 case P2P_PENDING_INVITATION_REQUEST:
3167 p2p_invitation_req_cb(p2p, success);
3168 break;
3169 case P2P_PENDING_INVITATION_RESPONSE:
3170 p2p_invitation_resp_cb(p2p, success);
3171 break;
3172 case P2P_PENDING_DEV_DISC_REQUEST:
3173 p2p_dev_disc_req_cb(p2p, success);
3174 break;
3175 case P2P_PENDING_DEV_DISC_RESPONSE:
3176 p2p_dev_disc_resp_cb(p2p, success);
3177 break;
3178 case P2P_PENDING_GO_DISC_REQ:
3179 p2p_go_disc_req_cb(p2p, success);
3180 break;
3181 }
3182
3183 p2p->after_scan_tx_in_progress = 0;
3184 }
3185
3186
p2p_listen_cb(struct p2p_data * p2p,unsigned int freq,unsigned int duration)3187 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3188 unsigned int duration)
3189 {
3190 if (freq == p2p->pending_client_disc_freq) {
3191 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3192 p2p->pending_client_disc_freq = 0;
3193 return;
3194 }
3195
3196 if (freq != p2p->pending_listen_freq) {
3197 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3198 freq, duration, p2p->pending_listen_freq);
3199 return;
3200 }
3201
3202 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3203 p2p->pending_listen_sec, p2p->pending_listen_usec,
3204 p2p->pending_listen_freq);
3205 p2p->in_listen = 1;
3206 p2p->drv_in_listen = freq;
3207 if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3208 /*
3209 * Add 20 msec extra wait to avoid race condition with driver
3210 * remain-on-channel end event, i.e., give driver more time to
3211 * complete the operation before our timeout expires.
3212 */
3213 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3214 p2p->pending_listen_usec + 20000);
3215 }
3216
3217 p2p->pending_listen_freq = 0;
3218 }
3219
3220
p2p_listen_end(struct p2p_data * p2p,unsigned int freq)3221 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3222 {
3223 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3224 p2p->drv_in_listen = 0;
3225 if (p2p->in_listen)
3226 return 0; /* Internal timeout will trigger the next step */
3227
3228 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3229 if (p2p->go_neg_peer->connect_reqs >= 120) {
3230 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3231 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3232 return 0;
3233 }
3234
3235 p2p_set_state(p2p, P2P_CONNECT);
3236 p2p_connect_send(p2p, p2p->go_neg_peer);
3237 return 1;
3238 } else if (p2p->state == P2P_SEARCH) {
3239 if (p2p->p2p_scan_running) {
3240 /*
3241 * Search is already in progress. This can happen if
3242 * an Action frame RX is reported immediately after
3243 * the end of a remain-on-channel operation and the
3244 * response frame to that is sent using an offchannel
3245 * operation while in p2p_find. Avoid an attempt to
3246 * restart a scan here.
3247 */
3248 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3249 return 1;
3250 }
3251 if (p2p->pending_listen_freq) {
3252 /*
3253 * Better wait a bit if the driver is unable to start
3254 * offchannel operation for some reason. p2p_search()
3255 * will be started from internal timeout.
3256 */
3257 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3258 p2p_set_timeout(p2p, 0, 100000);
3259 return 1;
3260 }
3261 if (p2p->search_delay) {
3262 p2p_dbg(p2p, "Delay search operation by %u ms",
3263 p2p->search_delay);
3264 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3265 (p2p->search_delay % 1000) * 1000);
3266 return 1;
3267 }
3268 p2p_search(p2p);
3269 return 1;
3270 }
3271
3272 return 0;
3273 }
3274
3275
p2p_timeout_connect(struct p2p_data * p2p)3276 static void p2p_timeout_connect(struct p2p_data *p2p)
3277 {
3278 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3279 if (p2p->go_neg_peer &&
3280 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3281 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3282 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3283 return;
3284 }
3285 if (p2p->go_neg_peer &&
3286 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3287 p2p->go_neg_peer->connect_reqs < 120) {
3288 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3289 p2p_connect_send(p2p, p2p->go_neg_peer);
3290 return;
3291 }
3292 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3293 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3294 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3295 p2p_set_timeout(p2p, 0, 30000);
3296 return;
3297 }
3298 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3299 p2p_listen_in_find(p2p, 0);
3300 }
3301
3302
p2p_timeout_connect_listen(struct p2p_data * p2p)3303 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3304 {
3305 if (p2p->go_neg_peer) {
3306 if (p2p->drv_in_listen) {
3307 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3308 return;
3309 }
3310
3311 if (p2p->go_neg_peer->connect_reqs >= 120) {
3312 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3313 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3314 return;
3315 }
3316
3317 p2p_set_state(p2p, P2P_CONNECT);
3318 p2p_connect_send(p2p, p2p->go_neg_peer);
3319 } else
3320 p2p_set_state(p2p, P2P_IDLE);
3321 }
3322
3323
p2p_timeout_wait_peer_connect(struct p2p_data * p2p)3324 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3325 {
3326 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3327
3328 if (p2p->cfg->is_concurrent_session_active &&
3329 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3330 p2p_set_timeout(p2p, 0, 500000);
3331 else
3332 p2p_set_timeout(p2p, 0, 200000);
3333 }
3334
3335
p2p_timeout_wait_peer_idle(struct p2p_data * p2p)3336 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3337 {
3338 struct p2p_device *dev = p2p->go_neg_peer;
3339 struct os_reltime now;
3340
3341 if (dev == NULL) {
3342 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3343 return;
3344 }
3345
3346 os_get_reltime(&now);
3347 if (os_reltime_expired(&now, &dev->go_neg_wait_started, 120)) {
3348 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation");
3349 p2p_go_neg_failed(p2p, dev, -1);
3350 return;
3351 }
3352
3353 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3354 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3355 p2p_listen_in_find(p2p, 0);
3356 }
3357
3358
p2p_timeout_sd_during_find(struct p2p_data * p2p)3359 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3360 {
3361 p2p_dbg(p2p, "Service Discovery Query timeout");
3362 if (p2p->sd_peer) {
3363 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3364 p2p->sd_peer = NULL;
3365 }
3366 p2p_continue_find(p2p);
3367 }
3368
3369
p2p_timeout_prov_disc_during_find(struct p2p_data * p2p)3370 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3371 {
3372 p2p_dbg(p2p, "Provision Discovery Request timeout");
3373 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3374 p2p_continue_find(p2p);
3375 }
3376
3377
p2p_timeout_prov_disc_req(struct p2p_data * p2p)3378 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3379 {
3380 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3381
3382 /*
3383 * For user initiated PD requests that we have not gotten any responses
3384 * for while in IDLE state, we retry them a couple of times before
3385 * giving up.
3386 */
3387 if (!p2p->user_initiated_pd)
3388 return;
3389
3390 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3391
3392 if (p2p->pd_retries) {
3393 p2p->pd_retries--;
3394 p2p_retry_pd(p2p);
3395 } else {
3396 struct p2p_device *dev;
3397 int for_join = 0;
3398
3399 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3400 if (os_memcmp(p2p->pending_pd_devaddr,
3401 dev->info.p2p_device_addr, ETH_ALEN) != 0)
3402 continue;
3403 if (dev->req_config_methods &&
3404 (dev->flags & P2P_DEV_PD_FOR_JOIN))
3405 for_join = 1;
3406 }
3407
3408 if (p2p->cfg->prov_disc_fail)
3409 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3410 p2p->pending_pd_devaddr,
3411 for_join ?
3412 P2P_PROV_DISC_TIMEOUT_JOIN :
3413 P2P_PROV_DISC_TIMEOUT);
3414 p2p_reset_pending_pd(p2p);
3415 }
3416 }
3417
3418
p2p_timeout_invite(struct p2p_data * p2p)3419 static void p2p_timeout_invite(struct p2p_data *p2p)
3420 {
3421 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3422 p2p_set_state(p2p, P2P_INVITE_LISTEN);
3423 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3424 /*
3425 * Better remain on operating channel instead of listen channel
3426 * when running a group.
3427 */
3428 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3429 p2p_set_timeout(p2p, 0, 100000);
3430 return;
3431 }
3432 p2p_listen_in_find(p2p, 0);
3433 }
3434
3435
p2p_timeout_invite_listen(struct p2p_data * p2p)3436 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3437 {
3438 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3439 p2p_set_state(p2p, P2P_INVITE);
3440 p2p_invite_send(p2p, p2p->invite_peer,
3441 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3442 } else {
3443 if (p2p->invite_peer) {
3444 p2p_dbg(p2p, "Invitation Request retry limit reached");
3445 if (p2p->cfg->invitation_result)
3446 p2p->cfg->invitation_result(
3447 p2p->cfg->cb_ctx, -1, NULL, NULL,
3448 p2p->invite_peer->info.p2p_device_addr,
3449 0, 0);
3450 }
3451 p2p_set_state(p2p, P2P_IDLE);
3452 }
3453 }
3454
3455
p2p_state_timeout(void * eloop_ctx,void * timeout_ctx)3456 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3457 {
3458 struct p2p_data *p2p = eloop_ctx;
3459
3460 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3461
3462 p2p->in_listen = 0;
3463
3464 switch (p2p->state) {
3465 case P2P_IDLE:
3466 /* Check if we timed out waiting for PD req */
3467 if (p2p->pending_action_state == P2P_PENDING_PD)
3468 p2p_timeout_prov_disc_req(p2p);
3469 break;
3470 case P2P_SEARCH:
3471 /* Check if we timed out waiting for PD req */
3472 if (p2p->pending_action_state == P2P_PENDING_PD)
3473 p2p_timeout_prov_disc_req(p2p);
3474 if (p2p->search_delay && !p2p->in_search_delay) {
3475 p2p_dbg(p2p, "Delay search operation by %u ms",
3476 p2p->search_delay);
3477 p2p->in_search_delay = 1;
3478 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3479 (p2p->search_delay % 1000) * 1000);
3480 break;
3481 }
3482 p2p->in_search_delay = 0;
3483 p2p_search(p2p);
3484 break;
3485 case P2P_CONNECT:
3486 p2p_timeout_connect(p2p);
3487 break;
3488 case P2P_CONNECT_LISTEN:
3489 p2p_timeout_connect_listen(p2p);
3490 break;
3491 case P2P_GO_NEG:
3492 break;
3493 case P2P_LISTEN_ONLY:
3494 /* Check if we timed out waiting for PD req */
3495 if (p2p->pending_action_state == P2P_PENDING_PD)
3496 p2p_timeout_prov_disc_req(p2p);
3497
3498 if (p2p->ext_listen_only) {
3499 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3500 p2p->ext_listen_only = 0;
3501 p2p_set_state(p2p, P2P_IDLE);
3502 }
3503 break;
3504 case P2P_WAIT_PEER_CONNECT:
3505 p2p_timeout_wait_peer_connect(p2p);
3506 break;
3507 case P2P_WAIT_PEER_IDLE:
3508 p2p_timeout_wait_peer_idle(p2p);
3509 break;
3510 case P2P_SD_DURING_FIND:
3511 p2p_timeout_sd_during_find(p2p);
3512 break;
3513 case P2P_PROVISIONING:
3514 break;
3515 case P2P_PD_DURING_FIND:
3516 p2p_timeout_prov_disc_during_find(p2p);
3517 break;
3518 case P2P_INVITE:
3519 p2p_timeout_invite(p2p);
3520 break;
3521 case P2P_INVITE_LISTEN:
3522 p2p_timeout_invite_listen(p2p);
3523 break;
3524 }
3525 }
3526
3527
p2p_reject(struct p2p_data * p2p,const u8 * peer_addr)3528 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3529 {
3530 struct p2p_device *dev;
3531
3532 dev = p2p_get_device(p2p, peer_addr);
3533 p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3534 MACSTR, MAC2STR(peer_addr));
3535 if (dev == NULL) {
3536 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3537 return -1;
3538 }
3539 dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3540 dev->flags |= P2P_DEV_USER_REJECTED;
3541 return 0;
3542 }
3543
3544
p2p_wps_method_text(enum p2p_wps_method method)3545 const char * p2p_wps_method_text(enum p2p_wps_method method)
3546 {
3547 switch (method) {
3548 case WPS_NOT_READY:
3549 return "not-ready";
3550 case WPS_PIN_DISPLAY:
3551 return "Display";
3552 case WPS_PIN_KEYPAD:
3553 return "Keypad";
3554 case WPS_PBC:
3555 return "PBC";
3556 case WPS_NFC:
3557 return "NFC";
3558 }
3559
3560 return "??";
3561 }
3562
3563
p2p_go_state_text(enum p2p_go_state go_state)3564 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3565 {
3566 switch (go_state) {
3567 case UNKNOWN_GO:
3568 return "unknown";
3569 case LOCAL_GO:
3570 return "local";
3571 case REMOTE_GO:
3572 return "remote";
3573 }
3574
3575 return "??";
3576 }
3577
3578
p2p_get_peer_info(struct p2p_data * p2p,const u8 * addr,int next)3579 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3580 const u8 *addr, int next)
3581 {
3582 struct p2p_device *dev;
3583
3584 if (addr)
3585 dev = p2p_get_device(p2p, addr);
3586 else
3587 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3588
3589 if (dev && next) {
3590 dev = dl_list_first(&dev->list, struct p2p_device, list);
3591 if (&dev->list == &p2p->devices)
3592 dev = NULL;
3593 }
3594
3595 if (dev == NULL)
3596 return NULL;
3597
3598 return &dev->info;
3599 }
3600
3601
p2p_get_peer_info_txt(const struct p2p_peer_info * info,char * buf,size_t buflen)3602 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3603 char *buf, size_t buflen)
3604 {
3605 struct p2p_device *dev;
3606 int res;
3607 char *pos, *end;
3608 struct os_reltime now;
3609
3610 if (info == NULL)
3611 return -1;
3612
3613 dev = (struct p2p_device *) (((u8 *) info) -
3614 offsetof(struct p2p_device, info));
3615
3616 pos = buf;
3617 end = buf + buflen;
3618
3619 os_get_reltime(&now);
3620 res = os_snprintf(pos, end - pos,
3621 "age=%d\n"
3622 "listen_freq=%d\n"
3623 "wps_method=%s\n"
3624 "interface_addr=" MACSTR "\n"
3625 "member_in_go_dev=" MACSTR "\n"
3626 "member_in_go_iface=" MACSTR "\n"
3627 "go_neg_req_sent=%d\n"
3628 "go_state=%s\n"
3629 "dialog_token=%u\n"
3630 "intended_addr=" MACSTR "\n"
3631 "country=%c%c\n"
3632 "oper_freq=%d\n"
3633 "req_config_methods=0x%x\n"
3634 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3635 "status=%d\n"
3636 "invitation_reqs=%u\n",
3637 (int) (now.sec - dev->last_seen.sec),
3638 dev->listen_freq,
3639 p2p_wps_method_text(dev->wps_method),
3640 MAC2STR(dev->interface_addr),
3641 MAC2STR(dev->member_in_go_dev),
3642 MAC2STR(dev->member_in_go_iface),
3643 dev->go_neg_req_sent,
3644 p2p_go_state_text(dev->go_state),
3645 dev->dialog_token,
3646 MAC2STR(dev->intended_addr),
3647 dev->country[0] ? dev->country[0] : '_',
3648 dev->country[1] ? dev->country[1] : '_',
3649 dev->oper_freq,
3650 dev->req_config_methods,
3651 dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3652 "[PROBE_REQ_ONLY]" : "",
3653 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3654 dev->flags & P2P_DEV_NOT_YET_READY ?
3655 "[NOT_YET_READY]" : "",
3656 dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3657 "[PD_PEER_DISPLAY]" : "",
3658 dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3659 "[PD_PEER_KEYPAD]" : "",
3660 dev->flags & P2P_DEV_USER_REJECTED ?
3661 "[USER_REJECTED]" : "",
3662 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3663 "[PEER_WAITING_RESPONSE]" : "",
3664 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3665 "[PREFER_PERSISTENT_GROUP]" : "",
3666 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3667 "[WAIT_GO_NEG_RESPONSE]" : "",
3668 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3669 "[WAIT_GO_NEG_CONFIRM]" : "",
3670 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3671 "[GROUP_CLIENT_ONLY]" : "",
3672 dev->flags & P2P_DEV_FORCE_FREQ ?
3673 "[FORCE_FREQ]" : "",
3674 dev->flags & P2P_DEV_PD_FOR_JOIN ?
3675 "[PD_FOR_JOIN]" : "",
3676 dev->status,
3677 dev->invitation_reqs);
3678 if (res < 0 || res >= end - pos)
3679 return pos - buf;
3680 pos += res;
3681
3682 if (dev->ext_listen_period) {
3683 res = os_snprintf(pos, end - pos,
3684 "ext_listen_period=%u\n"
3685 "ext_listen_interval=%u\n",
3686 dev->ext_listen_period,
3687 dev->ext_listen_interval);
3688 if (res < 0 || res >= end - pos)
3689 return pos - buf;
3690 pos += res;
3691 }
3692
3693 if (dev->oper_ssid_len) {
3694 res = os_snprintf(pos, end - pos,
3695 "oper_ssid=%s\n",
3696 wpa_ssid_txt(dev->oper_ssid,
3697 dev->oper_ssid_len));
3698 if (res < 0 || res >= end - pos)
3699 return pos - buf;
3700 pos += res;
3701 }
3702
3703 #ifdef CONFIG_WIFI_DISPLAY
3704 if (dev->info.wfd_subelems) {
3705 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3706 if (res < 0 || res >= end - pos)
3707 return pos - buf;
3708 pos += res;
3709
3710 pos += wpa_snprintf_hex(pos, end - pos,
3711 wpabuf_head(dev->info.wfd_subelems),
3712 wpabuf_len(dev->info.wfd_subelems));
3713
3714 res = os_snprintf(pos, end - pos, "\n");
3715 if (res < 0 || res >= end - pos)
3716 return pos - buf;
3717 pos += res;
3718 }
3719 #endif /* CONFIG_WIFI_DISPLAY */
3720
3721 return pos - buf;
3722 }
3723
3724
p2p_peer_known(struct p2p_data * p2p,const u8 * addr)3725 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3726 {
3727 return p2p_get_device(p2p, addr) != NULL;
3728 }
3729
3730
p2p_set_client_discoverability(struct p2p_data * p2p,int enabled)3731 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3732 {
3733 if (enabled) {
3734 p2p_dbg(p2p, "Client discoverability enabled");
3735 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3736 } else {
3737 p2p_dbg(p2p, "Client discoverability disabled");
3738 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3739 }
3740 }
3741
3742
p2p_build_presence_req(u32 duration1,u32 interval1,u32 duration2,u32 interval2)3743 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3744 u32 duration2, u32 interval2)
3745 {
3746 struct wpabuf *req;
3747 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3748 u8 *len;
3749
3750 req = wpabuf_alloc(100);
3751 if (req == NULL)
3752 return NULL;
3753
3754 if (duration1 || interval1) {
3755 os_memset(&desc1, 0, sizeof(desc1));
3756 desc1.count_type = 1;
3757 desc1.duration = duration1;
3758 desc1.interval = interval1;
3759 ptr1 = &desc1;
3760
3761 if (duration2 || interval2) {
3762 os_memset(&desc2, 0, sizeof(desc2));
3763 desc2.count_type = 2;
3764 desc2.duration = duration2;
3765 desc2.interval = interval2;
3766 ptr2 = &desc2;
3767 }
3768 }
3769
3770 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3771 len = p2p_buf_add_ie_hdr(req);
3772 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3773 p2p_buf_update_ie_hdr(req, len);
3774
3775 return req;
3776 }
3777
3778
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)3779 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3780 const u8 *own_interface_addr, unsigned int freq,
3781 u32 duration1, u32 interval1, u32 duration2,
3782 u32 interval2)
3783 {
3784 struct wpabuf *req;
3785
3786 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
3787 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
3788 "dur2=%u int2=%u",
3789 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3790 freq, duration1, interval1, duration2, interval2);
3791
3792 req = p2p_build_presence_req(duration1, interval1, duration2,
3793 interval2);
3794 if (req == NULL)
3795 return -1;
3796
3797 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3798 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3799 go_interface_addr,
3800 wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3801 p2p_dbg(p2p, "Failed to send Action frame");
3802 }
3803 wpabuf_free(req);
3804
3805 return 0;
3806 }
3807
3808
p2p_build_presence_resp(u8 status,const u8 * noa,size_t noa_len,u8 dialog_token)3809 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3810 size_t noa_len, u8 dialog_token)
3811 {
3812 struct wpabuf *resp;
3813 u8 *len;
3814
3815 resp = wpabuf_alloc(100 + noa_len);
3816 if (resp == NULL)
3817 return NULL;
3818
3819 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3820 len = p2p_buf_add_ie_hdr(resp);
3821 p2p_buf_add_status(resp, status);
3822 if (noa) {
3823 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3824 wpabuf_put_le16(resp, noa_len);
3825 wpabuf_put_data(resp, noa, noa_len);
3826 } else
3827 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3828 p2p_buf_update_ie_hdr(resp, len);
3829
3830 return resp;
3831 }
3832
3833
p2p_process_presence_req(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len,int rx_freq)3834 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3835 const u8 *sa, const u8 *data, size_t len,
3836 int rx_freq)
3837 {
3838 struct p2p_message msg;
3839 u8 status;
3840 struct wpabuf *resp;
3841 size_t g;
3842 struct p2p_group *group = NULL;
3843 int parsed = 0;
3844 u8 noa[50];
3845 int noa_len;
3846
3847 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
3848
3849 for (g = 0; g < p2p->num_groups; g++) {
3850 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3851 ETH_ALEN) == 0) {
3852 group = p2p->groups[g];
3853 break;
3854 }
3855 }
3856 if (group == NULL) {
3857 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
3858 MACSTR, MAC2STR(da));
3859 return;
3860 }
3861
3862 if (p2p_parse(data, len, &msg) < 0) {
3863 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
3864 status = P2P_SC_FAIL_INVALID_PARAMS;
3865 goto fail;
3866 }
3867 parsed = 1;
3868
3869 if (msg.noa == NULL) {
3870 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
3871 status = P2P_SC_FAIL_INVALID_PARAMS;
3872 goto fail;
3873 }
3874
3875 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3876
3877 fail:
3878 if (p2p->cfg->get_noa)
3879 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3880 sizeof(noa));
3881 else
3882 noa_len = -1;
3883 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3884 noa_len > 0 ? noa_len : 0,
3885 msg.dialog_token);
3886 if (parsed)
3887 p2p_parse_free(&msg);
3888 if (resp == NULL)
3889 return;
3890
3891 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3892 if (p2p_send_action(p2p, rx_freq, sa, da, da,
3893 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3894 p2p_dbg(p2p, "Failed to send Action frame");
3895 }
3896 wpabuf_free(resp);
3897 }
3898
3899
p2p_process_presence_resp(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len)3900 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3901 const u8 *sa, const u8 *data, size_t len)
3902 {
3903 struct p2p_message msg;
3904
3905 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
3906
3907 if (p2p_parse(data, len, &msg) < 0) {
3908 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
3909 return;
3910 }
3911
3912 if (msg.status == NULL || msg.noa == NULL) {
3913 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
3914 p2p_parse_free(&msg);
3915 return;
3916 }
3917
3918 if (p2p->cfg->presence_resp) {
3919 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
3920 msg.noa, msg.noa_len);
3921 }
3922
3923 if (*msg.status) {
3924 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
3925 *msg.status);
3926 p2p_parse_free(&msg);
3927 return;
3928 }
3929
3930 p2p_dbg(p2p, "P2P Presence Request was accepted");
3931 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
3932 msg.noa, msg.noa_len);
3933 /* TODO: process NoA */
3934 p2p_parse_free(&msg);
3935 }
3936
3937
p2p_ext_listen_timeout(void * eloop_ctx,void * timeout_ctx)3938 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
3939 {
3940 struct p2p_data *p2p = eloop_ctx;
3941
3942 if (p2p->ext_listen_interval) {
3943 /* Schedule next extended listen timeout */
3944 eloop_register_timeout(p2p->ext_listen_interval_sec,
3945 p2p->ext_listen_interval_usec,
3946 p2p_ext_listen_timeout, p2p, NULL);
3947 }
3948
3949 if ((p2p->cfg->is_p2p_in_progress &&
3950 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
3951 (p2p->pending_action_state == P2P_PENDING_PD &&
3952 p2p->pd_retries > 0)) {
3953 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
3954 p2p_state_txt(p2p->state));
3955 return;
3956 }
3957
3958 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
3959 /*
3960 * This should not really happen, but it looks like the Listen
3961 * command may fail is something else (e.g., a scan) was
3962 * running at an inconvenient time. As a workaround, allow new
3963 * Extended Listen operation to be started.
3964 */
3965 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
3966 p2p->ext_listen_only = 0;
3967 p2p_set_state(p2p, P2P_IDLE);
3968 }
3969
3970 if (p2p->state != P2P_IDLE) {
3971 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
3972 return;
3973 }
3974
3975 p2p_dbg(p2p, "Extended Listen timeout");
3976 p2p->ext_listen_only = 1;
3977 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
3978 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
3979 p2p->ext_listen_only = 0;
3980 }
3981 }
3982
3983
p2p_ext_listen(struct p2p_data * p2p,unsigned int period,unsigned int interval)3984 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
3985 unsigned int interval)
3986 {
3987 if (period > 65535 || interval > 65535 || period > interval ||
3988 (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
3989 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
3990 period, interval);
3991 return -1;
3992 }
3993
3994 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
3995
3996 if (interval == 0) {
3997 p2p_dbg(p2p, "Disabling Extended Listen Timing");
3998 p2p->ext_listen_period = 0;
3999 p2p->ext_listen_interval = 0;
4000 return 0;
4001 }
4002
4003 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4004 period, interval);
4005 p2p->ext_listen_period = period;
4006 p2p->ext_listen_interval = interval;
4007 p2p->ext_listen_interval_sec = interval / 1000;
4008 p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4009
4010 eloop_register_timeout(p2p->ext_listen_interval_sec,
4011 p2p->ext_listen_interval_usec,
4012 p2p_ext_listen_timeout, p2p, NULL);
4013
4014 return 0;
4015 }
4016
4017
p2p_deauth_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)4018 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4019 const u8 *ie, size_t ie_len)
4020 {
4021 struct p2p_message msg;
4022
4023 if (bssid == NULL || ie == NULL)
4024 return;
4025
4026 os_memset(&msg, 0, sizeof(msg));
4027 if (p2p_parse_ies(ie, ie_len, &msg))
4028 return;
4029 if (msg.minor_reason_code == NULL) {
4030 p2p_parse_free(&msg);
4031 return;
4032 }
4033
4034 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4035 " reason_code=%u minor_reason_code=%u",
4036 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4037
4038 p2p_parse_free(&msg);
4039 }
4040
4041
p2p_disassoc_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)4042 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4043 const u8 *ie, size_t ie_len)
4044 {
4045 struct p2p_message msg;
4046
4047 if (bssid == NULL || ie == NULL)
4048 return;
4049
4050 os_memset(&msg, 0, sizeof(msg));
4051 if (p2p_parse_ies(ie, ie_len, &msg))
4052 return;
4053 if (msg.minor_reason_code == NULL) {
4054 p2p_parse_free(&msg);
4055 return;
4056 }
4057
4058 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4059 " reason_code=%u minor_reason_code=%u",
4060 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4061
4062 p2p_parse_free(&msg);
4063 }
4064
4065
p2p_set_managed_oper(struct p2p_data * p2p,int enabled)4066 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4067 {
4068 if (enabled) {
4069 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4070 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4071 } else {
4072 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4073 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4074 }
4075 }
4076
4077
p2p_set_listen_channel(struct p2p_data * p2p,u8 reg_class,u8 channel,u8 forced)4078 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4079 u8 forced)
4080 {
4081 if (p2p_channel_to_freq(reg_class, channel) < 0)
4082 return -1;
4083
4084 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4085 reg_class, channel);
4086
4087 /*
4088 * Listen channel was set in configuration or set by control interface;
4089 * cannot override it.
4090 */
4091 if (p2p->cfg->channel_forced && forced == 0)
4092 return -1;
4093
4094 if (p2p->state == P2P_IDLE) {
4095 p2p->cfg->reg_class = reg_class;
4096 p2p->cfg->channel = channel;
4097 p2p->cfg->channel_forced = forced;
4098 } else {
4099 p2p_dbg(p2p, "Defer setting listen channel");
4100 p2p->pending_reg_class = reg_class;
4101 p2p->pending_channel = channel;
4102 p2p->pending_channel_forced = forced;
4103 }
4104
4105 return 0;
4106 }
4107
4108
p2p_get_listen_channel(struct p2p_data * p2p)4109 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4110 {
4111 return p2p->cfg->channel;
4112 }
4113
4114
p2p_set_ssid_postfix(struct p2p_data * p2p,const u8 * postfix,size_t len)4115 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4116 {
4117 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4118 if (postfix == NULL) {
4119 p2p->cfg->ssid_postfix_len = 0;
4120 return 0;
4121 }
4122 if (len > sizeof(p2p->cfg->ssid_postfix))
4123 return -1;
4124 os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4125 p2p->cfg->ssid_postfix_len = len;
4126 return 0;
4127 }
4128
4129
p2p_set_oper_channel(struct p2p_data * p2p,u8 op_reg_class,u8 op_channel,int cfg_op_channel)4130 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4131 int cfg_op_channel)
4132 {
4133 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4134 return -1;
4135
4136 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4137 op_reg_class, op_channel);
4138 p2p->cfg->op_reg_class = op_reg_class;
4139 p2p->cfg->op_channel = op_channel;
4140 p2p->cfg->cfg_op_channel = cfg_op_channel;
4141 return 0;
4142 }
4143
4144
p2p_set_pref_chan(struct p2p_data * p2p,unsigned int num_pref_chan,const struct p2p_channel * pref_chan)4145 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4146 const struct p2p_channel *pref_chan)
4147 {
4148 struct p2p_channel *n;
4149
4150 if (pref_chan) {
4151 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4152 if (n == NULL)
4153 return -1;
4154 os_memcpy(n, pref_chan,
4155 num_pref_chan * sizeof(struct p2p_channel));
4156 } else
4157 n = NULL;
4158
4159 os_free(p2p->cfg->pref_chan);
4160 p2p->cfg->pref_chan = n;
4161 p2p->cfg->num_pref_chan = num_pref_chan;
4162
4163 return 0;
4164 }
4165
4166
p2p_set_no_go_freq(struct p2p_data * p2p,const struct wpa_freq_range_list * list)4167 int p2p_set_no_go_freq(struct p2p_data *p2p,
4168 const struct wpa_freq_range_list *list)
4169 {
4170 struct wpa_freq_range *tmp;
4171
4172 if (list == NULL || list->num == 0) {
4173 os_free(p2p->no_go_freq.range);
4174 p2p->no_go_freq.range = NULL;
4175 p2p->no_go_freq.num = 0;
4176 return 0;
4177 }
4178
4179 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4180 if (tmp == NULL)
4181 return -1;
4182 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4183 os_free(p2p->no_go_freq.range);
4184 p2p->no_go_freq.range = tmp;
4185 p2p->no_go_freq.num = list->num;
4186 p2p_dbg(p2p, "Updated no GO chan list");
4187
4188 return 0;
4189 }
4190
4191
p2p_get_interface_addr(struct p2p_data * p2p,const u8 * dev_addr,u8 * iface_addr)4192 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4193 u8 *iface_addr)
4194 {
4195 struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4196 if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4197 return -1;
4198 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4199 return 0;
4200 }
4201
4202
p2p_get_dev_addr(struct p2p_data * p2p,const u8 * iface_addr,u8 * dev_addr)4203 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4204 u8 *dev_addr)
4205 {
4206 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4207 if (dev == NULL)
4208 return -1;
4209 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4210 return 0;
4211 }
4212
4213
p2p_set_peer_filter(struct p2p_data * p2p,const u8 * addr)4214 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4215 {
4216 os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4217 if (is_zero_ether_addr(p2p->peer_filter))
4218 p2p_dbg(p2p, "Disable peer filter");
4219 else
4220 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4221 MAC2STR(p2p->peer_filter));
4222 }
4223
4224
p2p_set_cross_connect(struct p2p_data * p2p,int enabled)4225 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4226 {
4227 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4228 if (p2p->cross_connect == enabled)
4229 return;
4230 p2p->cross_connect = enabled;
4231 /* TODO: may need to tear down any action group where we are GO(?) */
4232 }
4233
4234
p2p_get_oper_freq(struct p2p_data * p2p,const u8 * iface_addr)4235 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4236 {
4237 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4238 if (dev == NULL)
4239 return -1;
4240 if (dev->oper_freq <= 0)
4241 return -1;
4242 return dev->oper_freq;
4243 }
4244
4245
p2p_set_intra_bss_dist(struct p2p_data * p2p,int enabled)4246 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4247 {
4248 p2p_dbg(p2p, "Intra BSS distribution %s",
4249 enabled ? "enabled" : "disabled");
4250 p2p->cfg->p2p_intra_bss = enabled;
4251 }
4252
4253
p2p_update_channel_list(struct p2p_data * p2p,const struct p2p_channels * chan,const struct p2p_channels * cli_chan)4254 void p2p_update_channel_list(struct p2p_data *p2p,
4255 const struct p2p_channels *chan,
4256 const struct p2p_channels *cli_chan)
4257 {
4258 p2p_dbg(p2p, "Update channel list");
4259 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4260 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4261 os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4262 sizeof(struct p2p_channels));
4263 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4264 }
4265
4266
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)4267 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4268 const u8 *src, const u8 *bssid, const u8 *buf,
4269 size_t len, unsigned int wait_time)
4270 {
4271 if (p2p->p2p_scan_running) {
4272 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4273 if (p2p->after_scan_tx) {
4274 p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4275 os_free(p2p->after_scan_tx);
4276 }
4277 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4278 len);
4279 if (p2p->after_scan_tx == NULL)
4280 return -1;
4281 p2p->after_scan_tx->freq = freq;
4282 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4283 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4284 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4285 p2p->after_scan_tx->len = len;
4286 p2p->after_scan_tx->wait_time = wait_time;
4287 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4288 return 0;
4289 }
4290
4291 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4292 buf, len, wait_time);
4293 }
4294
4295
p2p_set_best_channels(struct p2p_data * p2p,int freq_24,int freq_5,int freq_overall)4296 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4297 int freq_overall)
4298 {
4299 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d",
4300 freq_24, freq_5, freq_overall);
4301 p2p->best_freq_24 = freq_24;
4302 p2p->best_freq_5 = freq_5;
4303 p2p->best_freq_overall = freq_overall;
4304 }
4305
4306
p2p_set_own_freq_preference(struct p2p_data * p2p,int freq)4307 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4308 {
4309 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4310 p2p->own_freq_preference = freq;
4311 }
4312
4313
p2p_get_go_neg_peer(struct p2p_data * p2p)4314 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4315 {
4316 if (p2p == NULL || p2p->go_neg_peer == NULL)
4317 return NULL;
4318 return p2p->go_neg_peer->info.p2p_device_addr;
4319 }
4320
4321
4322 const struct p2p_peer_info *
p2p_get_peer_found(struct p2p_data * p2p,const u8 * addr,int next)4323 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4324 {
4325 struct p2p_device *dev;
4326
4327 if (addr) {
4328 dev = p2p_get_device(p2p, addr);
4329 if (!dev)
4330 return NULL;
4331
4332 if (!next) {
4333 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4334 return NULL;
4335
4336 return &dev->info;
4337 } else {
4338 do {
4339 dev = dl_list_first(&dev->list,
4340 struct p2p_device,
4341 list);
4342 if (!dev || &dev->list == &p2p->devices)
4343 return NULL;
4344 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4345 }
4346 } else {
4347 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4348 if (!dev)
4349 return NULL;
4350 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4351 dev = dl_list_first(&dev->list,
4352 struct p2p_device,
4353 list);
4354 if (!dev || &dev->list == &p2p->devices)
4355 return NULL;
4356 }
4357 }
4358
4359 return &dev->info;
4360 }
4361
4362
p2p_in_progress(struct p2p_data * p2p)4363 int p2p_in_progress(struct p2p_data *p2p)
4364 {
4365 if (p2p == NULL)
4366 return 0;
4367 if (p2p->state == P2P_SEARCH)
4368 return 2;
4369 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4370 }
4371
4372
p2p_set_config_timeout(struct p2p_data * p2p,u8 go_timeout,u8 client_timeout)4373 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4374 u8 client_timeout)
4375 {
4376 if (p2p) {
4377 p2p->go_timeout = go_timeout;
4378 p2p->client_timeout = client_timeout;
4379 }
4380 }
4381
4382
4383 #ifdef CONFIG_WIFI_DISPLAY
4384
p2p_update_wfd_ie_groups(struct p2p_data * p2p)4385 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4386 {
4387 size_t g;
4388 struct p2p_group *group;
4389
4390 for (g = 0; g < p2p->num_groups; g++) {
4391 group = p2p->groups[g];
4392 p2p_group_force_beacon_update_ies(group);
4393 }
4394 }
4395
4396
p2p_set_wfd_ie_beacon(struct p2p_data * p2p,struct wpabuf * ie)4397 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4398 {
4399 wpabuf_free(p2p->wfd_ie_beacon);
4400 p2p->wfd_ie_beacon = ie;
4401 p2p_update_wfd_ie_groups(p2p);
4402 return 0;
4403 }
4404
4405
p2p_set_wfd_ie_probe_req(struct p2p_data * p2p,struct wpabuf * ie)4406 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4407 {
4408 wpabuf_free(p2p->wfd_ie_probe_req);
4409 p2p->wfd_ie_probe_req = ie;
4410 return 0;
4411 }
4412
4413
p2p_set_wfd_ie_probe_resp(struct p2p_data * p2p,struct wpabuf * ie)4414 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4415 {
4416 wpabuf_free(p2p->wfd_ie_probe_resp);
4417 p2p->wfd_ie_probe_resp = ie;
4418 p2p_update_wfd_ie_groups(p2p);
4419 return 0;
4420 }
4421
4422
p2p_set_wfd_ie_assoc_req(struct p2p_data * p2p,struct wpabuf * ie)4423 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4424 {
4425 wpabuf_free(p2p->wfd_ie_assoc_req);
4426 p2p->wfd_ie_assoc_req = ie;
4427 return 0;
4428 }
4429
4430
p2p_set_wfd_ie_invitation(struct p2p_data * p2p,struct wpabuf * ie)4431 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4432 {
4433 wpabuf_free(p2p->wfd_ie_invitation);
4434 p2p->wfd_ie_invitation = ie;
4435 return 0;
4436 }
4437
4438
p2p_set_wfd_ie_prov_disc_req(struct p2p_data * p2p,struct wpabuf * ie)4439 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4440 {
4441 wpabuf_free(p2p->wfd_ie_prov_disc_req);
4442 p2p->wfd_ie_prov_disc_req = ie;
4443 return 0;
4444 }
4445
4446
p2p_set_wfd_ie_prov_disc_resp(struct p2p_data * p2p,struct wpabuf * ie)4447 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4448 {
4449 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4450 p2p->wfd_ie_prov_disc_resp = ie;
4451 return 0;
4452 }
4453
4454
p2p_set_wfd_ie_go_neg(struct p2p_data * p2p,struct wpabuf * ie)4455 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4456 {
4457 wpabuf_free(p2p->wfd_ie_go_neg);
4458 p2p->wfd_ie_go_neg = ie;
4459 return 0;
4460 }
4461
4462
p2p_set_wfd_dev_info(struct p2p_data * p2p,const struct wpabuf * elem)4463 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4464 {
4465 wpabuf_free(p2p->wfd_dev_info);
4466 if (elem) {
4467 p2p->wfd_dev_info = wpabuf_dup(elem);
4468 if (p2p->wfd_dev_info == NULL)
4469 return -1;
4470 } else
4471 p2p->wfd_dev_info = NULL;
4472
4473 return 0;
4474 }
4475
4476
p2p_set_wfd_assoc_bssid(struct p2p_data * p2p,const struct wpabuf * elem)4477 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4478 {
4479 wpabuf_free(p2p->wfd_assoc_bssid);
4480 if (elem) {
4481 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4482 if (p2p->wfd_assoc_bssid == NULL)
4483 return -1;
4484 } else
4485 p2p->wfd_assoc_bssid = NULL;
4486
4487 return 0;
4488 }
4489
4490
p2p_set_wfd_coupled_sink_info(struct p2p_data * p2p,const struct wpabuf * elem)4491 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4492 const struct wpabuf *elem)
4493 {
4494 wpabuf_free(p2p->wfd_coupled_sink_info);
4495 if (elem) {
4496 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4497 if (p2p->wfd_coupled_sink_info == NULL)
4498 return -1;
4499 } else
4500 p2p->wfd_coupled_sink_info = NULL;
4501
4502 return 0;
4503 }
4504
4505 #endif /* CONFIG_WIFI_DISPLAY */
4506
4507
p2p_set_disc_int(struct p2p_data * p2p,int min_disc_int,int max_disc_int,int max_disc_tu)4508 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4509 int max_disc_tu)
4510 {
4511 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4512 return -1;
4513
4514 p2p->min_disc_int = min_disc_int;
4515 p2p->max_disc_int = max_disc_int;
4516 p2p->max_disc_tu = max_disc_tu;
4517 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4518 min_disc_int, max_disc_int, max_disc_tu);
4519
4520 return 0;
4521 }
4522
4523
p2p_dbg(struct p2p_data * p2p,const char * fmt,...)4524 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4525 {
4526 va_list ap;
4527 char buf[500];
4528
4529 if (!p2p->cfg->debug_print)
4530 return;
4531
4532 va_start(ap, fmt);
4533 vsnprintf(buf, sizeof(buf), fmt, ap);
4534 buf[sizeof(buf) - 1] = '\0';
4535 va_end(ap);
4536 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4537 }
4538
4539
p2p_info(struct p2p_data * p2p,const char * fmt,...)4540 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4541 {
4542 va_list ap;
4543 char buf[500];
4544
4545 if (!p2p->cfg->debug_print)
4546 return;
4547
4548 va_start(ap, fmt);
4549 vsnprintf(buf, sizeof(buf), fmt, ap);
4550 buf[sizeof(buf) - 1] = '\0';
4551 va_end(ap);
4552 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4553 }
4554
4555
p2p_err(struct p2p_data * p2p,const char * fmt,...)4556 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4557 {
4558 va_list ap;
4559 char buf[500];
4560
4561 if (!p2p->cfg->debug_print)
4562 return;
4563
4564 va_start(ap, fmt);
4565 vsnprintf(buf, sizeof(buf), fmt, ap);
4566 buf[sizeof(buf) - 1] = '\0';
4567 va_end(ap);
4568 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4569 }
4570
4571
p2p_loop_on_known_peers(struct p2p_data * p2p,void (* peer_callback)(struct p2p_peer_info * peer,void * user_data),void * user_data)4572 void p2p_loop_on_known_peers(struct p2p_data *p2p,
4573 void (*peer_callback)(struct p2p_peer_info *peer,
4574 void *user_data),
4575 void *user_data)
4576 {
4577 struct p2p_device *dev, *n;
4578
4579 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
4580 peer_callback(&dev->info, user_data);
4581 }
4582 }
4583
4584
4585 #ifdef CONFIG_WPS_NFC
4586
p2p_build_nfc_handover(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)4587 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
4588 int client_freq,
4589 const u8 *go_dev_addr,
4590 const u8 *ssid, size_t ssid_len)
4591 {
4592 struct wpabuf *buf;
4593 u8 op_class, channel;
4594 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
4595
4596 buf = wpabuf_alloc(1000);
4597 if (buf == NULL)
4598 return NULL;
4599
4600 op_class = p2p->cfg->reg_class;
4601 channel = p2p->cfg->channel;
4602
4603 p2p_buf_add_capability(buf, p2p->dev_capab &
4604 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
4605 p2p_buf_add_device_info(buf, p2p, NULL);
4606
4607 if (p2p->num_groups > 0) {
4608 int freq = p2p_group_get_freq(p2p->groups[0]);
4609 role = P2P_GO_IN_A_GROUP;
4610 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
4611 p2p_dbg(p2p,
4612 "Unknown GO operating frequency %d MHz for NFC handover",
4613 freq);
4614 wpabuf_free(buf);
4615 return NULL;
4616 }
4617 } else if (client_freq > 0) {
4618 role = P2P_CLIENT_IN_A_GROUP;
4619 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
4620 p2p_dbg(p2p,
4621 "Unknown client operating frequency %d MHz for NFC handover",
4622 client_freq);
4623 wpabuf_free(buf);
4624 return NULL;
4625 }
4626 }
4627
4628 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
4629 channel, role);
4630
4631 if (p2p->num_groups > 0) {
4632 /* Limit number of clients to avoid very long message */
4633 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
4634 p2p_group_buf_add_id(p2p->groups[0], buf);
4635 } else if (client_freq > 0 &&
4636 go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
4637 ssid && ssid_len > 0) {
4638 /*
4639 * Add the optional P2P Group ID to indicate in which group this
4640 * device is a P2P Client.
4641 */
4642 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
4643 }
4644
4645 return buf;
4646 }
4647
4648
p2p_build_nfc_handover_req(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)4649 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
4650 int client_freq,
4651 const u8 *go_dev_addr,
4652 const u8 *ssid, size_t ssid_len)
4653 {
4654 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4655 ssid_len);
4656 }
4657
4658
p2p_build_nfc_handover_sel(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)4659 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
4660 int client_freq,
4661 const u8 *go_dev_addr,
4662 const u8 *ssid, size_t ssid_len)
4663 {
4664 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4665 ssid_len);
4666 }
4667
4668
p2p_process_nfc_connection_handover(struct p2p_data * p2p,struct p2p_nfc_params * params)4669 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
4670 struct p2p_nfc_params *params)
4671 {
4672 struct p2p_message msg;
4673 struct p2p_device *dev;
4674 const u8 *p2p_dev_addr;
4675 int freq;
4676 enum p2p_role_indication role;
4677
4678 params->next_step = NO_ACTION;
4679
4680 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
4681 params->p2p_attr, params->p2p_len, &msg)) {
4682 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
4683 p2p_parse_free(&msg);
4684 return -1;
4685 }
4686
4687 if (msg.p2p_device_addr)
4688 p2p_dev_addr = msg.p2p_device_addr;
4689 else if (msg.device_id)
4690 p2p_dev_addr = msg.device_id;
4691 else {
4692 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
4693 p2p_parse_free(&msg);
4694 return -1;
4695 }
4696
4697 if (msg.oob_dev_password) {
4698 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
4699 msg.oob_dev_password_len);
4700 params->oob_dev_pw_len = msg.oob_dev_password_len;
4701 }
4702
4703 dev = p2p_create_device(p2p, p2p_dev_addr);
4704 if (dev == NULL) {
4705 p2p_parse_free(&msg);
4706 return -1;
4707 }
4708
4709 params->peer = &dev->info;
4710
4711 os_get_reltime(&dev->last_seen);
4712 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
4713 p2p_copy_wps_info(p2p, dev, 0, &msg);
4714
4715 if (!msg.oob_go_neg_channel) {
4716 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
4717 return -1;
4718 }
4719
4720 if (msg.oob_go_neg_channel[3] == 0 &&
4721 msg.oob_go_neg_channel[4] == 0)
4722 freq = 0;
4723 else
4724 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
4725 msg.oob_go_neg_channel[4]);
4726 if (freq < 0) {
4727 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
4728 return -1;
4729 }
4730 role = msg.oob_go_neg_channel[5];
4731
4732 if (role == P2P_GO_IN_A_GROUP) {
4733 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
4734 params->go_freq = freq;
4735 } else if (role == P2P_CLIENT_IN_A_GROUP) {
4736 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
4737 freq);
4738 params->go_freq = freq;
4739 } else
4740 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
4741 dev->oob_go_neg_freq = freq;
4742
4743 if (!params->sel && role != P2P_GO_IN_A_GROUP) {
4744 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
4745 p2p->cfg->channel);
4746 if (freq < 0) {
4747 p2p_dbg(p2p, "Own listen channel not known");
4748 return -1;
4749 }
4750 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
4751 dev->oob_go_neg_freq = freq;
4752 }
4753
4754 if (msg.group_id) {
4755 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
4756 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
4757 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
4758 params->go_ssid_len);
4759 }
4760
4761 if (dev->flags & P2P_DEV_USER_REJECTED) {
4762 p2p_dbg(p2p, "Do not report rejected device");
4763 p2p_parse_free(&msg);
4764 return 0;
4765 }
4766
4767 if (!(dev->flags & P2P_DEV_REPORTED)) {
4768 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
4769 !(dev->flags & P2P_DEV_REPORTED_ONCE));
4770 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
4771 }
4772 p2p_parse_free(&msg);
4773
4774 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
4775 params->next_step = BOTH_GO;
4776 else if (role == P2P_GO_IN_A_GROUP)
4777 params->next_step = JOIN_GROUP;
4778 else if (role == P2P_CLIENT_IN_A_GROUP) {
4779 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
4780 params->next_step = PEER_CLIENT;
4781 } else if (p2p->num_groups > 0)
4782 params->next_step = AUTH_JOIN;
4783 else if (params->sel)
4784 params->next_step = INIT_GO_NEG;
4785 else
4786 params->next_step = RESP_GO_NEG;
4787
4788 return 0;
4789 }
4790
4791
p2p_set_authorized_oob_dev_pw_id(struct p2p_data * p2p,u16 dev_pw_id,int go_intent,const u8 * own_interface_addr)4792 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
4793 int go_intent,
4794 const u8 *own_interface_addr)
4795 {
4796
4797 p2p->authorized_oob_dev_pw_id = dev_pw_id;
4798 if (dev_pw_id == 0) {
4799 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
4800 return;
4801 }
4802
4803 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
4804 dev_pw_id);
4805
4806 p2p->go_intent = go_intent;
4807 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
4808 }
4809
4810 #endif /* CONFIG_WPS_NFC */
4811
4812
p2p_set_passphrase_len(struct p2p_data * p2p,unsigned int len)4813 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
4814 {
4815 if (len < 8 || len > 63)
4816 return -1;
4817 p2p->cfg->passphrase_len = len;
4818 return 0;
4819 }
4820
4821
p2p_set_vendor_elems(struct p2p_data * p2p,struct wpabuf ** vendor_elem)4822 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
4823 {
4824 p2p->vendor_elem = vendor_elem;
4825 }
4826