1 /*
2 * Wi-Fi Direct - P2P module
3 * Copyright (c) 2009-2010, Atheros Communications
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "eloop.h"
13 #include "common/defs.h"
14 #include "common/ieee802_11_defs.h"
15 #include "common/ieee802_11_common.h"
16 #include "common/wpa_ctrl.h"
17 #include "crypto/sha256.h"
18 #include "crypto/crypto.h"
19 #include "wps/wps_i.h"
20 #include "p2p_i.h"
21 #include "p2p.h"
22
23
24 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
25 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
26 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
27 const u8 *sa, const u8 *data, size_t len,
28 int rx_freq);
29 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
30 const u8 *sa, const u8 *data,
31 size_t len);
32 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
33 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
34
35
36 /*
37 * p2p_scan recovery timeout
38 *
39 * Many drivers are using 30 second timeout on scan results. Allow a bit larger
40 * timeout for this to avoid hitting P2P timeout unnecessarily.
41 */
42 #define P2P_SCAN_TIMEOUT 35
43
44 /**
45 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
46 * entries will be removed
47 */
48 #ifndef P2P_PEER_EXPIRATION_AGE
49 #define P2P_PEER_EXPIRATION_AGE 60
50 #endif /* P2P_PEER_EXPIRATION_AGE */
51
52
p2p_expire_peers(struct p2p_data * p2p)53 void p2p_expire_peers(struct p2p_data *p2p)
54 {
55 struct p2p_device *dev, *n;
56 struct os_reltime now;
57 size_t i;
58
59 os_get_reltime(&now);
60 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
61 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
62 continue;
63
64 if (dev == p2p->go_neg_peer) {
65 /*
66 * GO Negotiation is in progress with the peer, so
67 * don't expire the peer entry until GO Negotiation
68 * fails or times out.
69 */
70 continue;
71 }
72
73 if (p2p->cfg->go_connected &&
74 p2p->cfg->go_connected(p2p->cfg->cb_ctx,
75 dev->info.p2p_device_addr)) {
76 /*
77 * We are connected as a client to a group in which the
78 * peer is the GO, so do not expire the peer entry.
79 */
80 os_get_reltime(&dev->last_seen);
81 continue;
82 }
83
84 for (i = 0; i < p2p->num_groups; i++) {
85 if (p2p_group_is_client_connected(
86 p2p->groups[i], dev->info.p2p_device_addr))
87 break;
88 }
89 if (i < p2p->num_groups) {
90 /*
91 * The peer is connected as a client in a group where
92 * we are the GO, so do not expire the peer entry.
93 */
94 os_get_reltime(&dev->last_seen);
95 continue;
96 }
97
98 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
99 MAC2STR(dev->info.p2p_device_addr));
100 dl_list_del(&dev->list);
101 p2p_device_free(p2p, dev);
102 }
103 }
104
105
p2p_state_txt(int state)106 static const char * p2p_state_txt(int state)
107 {
108 switch (state) {
109 case P2P_IDLE:
110 return "IDLE";
111 case P2P_SEARCH:
112 return "SEARCH";
113 case P2P_CONNECT:
114 return "CONNECT";
115 case P2P_CONNECT_LISTEN:
116 return "CONNECT_LISTEN";
117 case P2P_GO_NEG:
118 return "GO_NEG";
119 case P2P_LISTEN_ONLY:
120 return "LISTEN_ONLY";
121 case P2P_WAIT_PEER_CONNECT:
122 return "WAIT_PEER_CONNECT";
123 case P2P_WAIT_PEER_IDLE:
124 return "WAIT_PEER_IDLE";
125 case P2P_SD_DURING_FIND:
126 return "SD_DURING_FIND";
127 case P2P_PROVISIONING:
128 return "PROVISIONING";
129 case P2P_PD_DURING_FIND:
130 return "PD_DURING_FIND";
131 case P2P_INVITE:
132 return "INVITE";
133 case P2P_INVITE_LISTEN:
134 return "INVITE_LISTEN";
135 default:
136 return "?";
137 }
138 }
139
140
p2p_get_state_txt(struct p2p_data * p2p)141 const char * p2p_get_state_txt(struct p2p_data *p2p)
142 {
143 return p2p_state_txt(p2p->state);
144 }
145
146
p2p_get_p2ps_adv_list(struct p2p_data * p2p)147 struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p)
148 {
149 return p2p ? p2p->p2ps_adv_list : NULL;
150 }
151
152
p2p_set_intended_addr(struct p2p_data * p2p,const u8 * intended_addr)153 void p2p_set_intended_addr(struct p2p_data *p2p, const u8 *intended_addr)
154 {
155 if (p2p && intended_addr)
156 os_memcpy(p2p->intended_addr, intended_addr, ETH_ALEN);
157 }
158
159
p2p_get_provisioning_info(struct p2p_data * p2p,const u8 * addr)160 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
161 {
162 struct p2p_device *dev = NULL;
163
164 if (!addr || !p2p)
165 return 0;
166
167 dev = p2p_get_device(p2p, addr);
168 if (dev)
169 return dev->wps_prov_info;
170 else
171 return 0;
172 }
173
174
p2p_clear_provisioning_info(struct p2p_data * p2p,const u8 * addr)175 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
176 {
177 struct p2p_device *dev = NULL;
178
179 if (!addr || !p2p)
180 return;
181
182 dev = p2p_get_device(p2p, addr);
183 if (dev)
184 dev->wps_prov_info = 0;
185 }
186
187
p2p_set_state(struct p2p_data * p2p,int new_state)188 void p2p_set_state(struct p2p_data *p2p, int new_state)
189 {
190 p2p_dbg(p2p, "State %s -> %s",
191 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
192 p2p->state = new_state;
193
194 if (new_state == P2P_IDLE && p2p->pending_channel) {
195 p2p_dbg(p2p, "Apply change in listen channel");
196 p2p->cfg->reg_class = p2p->pending_reg_class;
197 p2p->cfg->channel = p2p->pending_channel;
198 p2p->pending_reg_class = 0;
199 p2p->pending_channel = 0;
200 }
201 }
202
203
p2p_set_timeout(struct p2p_data * p2p,unsigned int sec,unsigned int usec)204 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
205 {
206 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
207 p2p_state_txt(p2p->state), sec, usec);
208 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
209 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
210 }
211
212
p2p_clear_timeout(struct p2p_data * p2p)213 void p2p_clear_timeout(struct p2p_data *p2p)
214 {
215 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
216 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
217 }
218
219
p2p_go_neg_failed(struct p2p_data * p2p,int status)220 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
221 {
222 struct p2p_go_neg_results res;
223 struct p2p_device *peer = p2p->go_neg_peer;
224
225 if (!peer)
226 return;
227
228 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
229 if (p2p->state != P2P_SEARCH) {
230 /*
231 * Clear timeouts related to GO Negotiation if no new p2p_find
232 * has been started.
233 */
234 p2p_clear_timeout(p2p);
235 p2p_set_state(p2p, P2P_IDLE);
236 }
237
238 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
239 peer->wps_method = WPS_NOT_READY;
240 peer->oob_pw_id = 0;
241 wpabuf_free(peer->go_neg_conf);
242 peer->go_neg_conf = NULL;
243 p2p->go_neg_peer = NULL;
244
245 os_memset(&res, 0, sizeof(res));
246 res.status = status;
247 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
248 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
249 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
250 }
251
252
p2p_listen_in_find(struct p2p_data * p2p,int dev_disc)253 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
254 {
255 unsigned int r, tu;
256 int freq;
257 struct wpabuf *ies;
258
259 p2p_dbg(p2p, "Starting short listen state (state=%s)",
260 p2p_state_txt(p2p->state));
261
262 if (p2p->pending_listen_freq) {
263 /* We have a pending p2p_listen request */
264 p2p_dbg(p2p, "p2p_listen command pending already");
265 return;
266 }
267
268 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
269 if (freq < 0) {
270 p2p_dbg(p2p, "Unknown regulatory class/channel");
271 return;
272 }
273
274 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
275 r = 0;
276 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
277 p2p->min_disc_int) * 100;
278 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
279 tu = p2p->max_disc_tu;
280 if (!dev_disc && tu < 100)
281 tu = 100; /* Need to wait in non-device discovery use cases */
282 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
283 tu = p2p->cfg->max_listen * 1000 / 1024;
284
285 if (tu == 0) {
286 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
287 p2p_set_timeout(p2p, 0, 0);
288 return;
289 }
290
291 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
292 if (ies == NULL)
293 return;
294
295 p2p->pending_listen_freq = freq;
296 p2p->pending_listen_sec = 0;
297 p2p->pending_listen_usec = 1024 * tu;
298
299 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
300 ies) < 0) {
301 p2p_dbg(p2p, "Failed to start listen mode");
302 p2p->pending_listen_freq = 0;
303 }
304 wpabuf_free(ies);
305 }
306
307
p2p_listen(struct p2p_data * p2p,unsigned int timeout)308 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
309 {
310 int freq;
311 struct wpabuf *ies;
312
313 p2p_dbg(p2p, "Going to listen(only) state");
314
315 if (p2p->pending_listen_freq) {
316 /* We have a pending p2p_listen request */
317 p2p_dbg(p2p, "p2p_listen command pending already");
318 return -1;
319 }
320
321 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
322 if (freq < 0) {
323 p2p_dbg(p2p, "Unknown regulatory class/channel");
324 return -1;
325 }
326
327 p2p->pending_listen_sec = timeout / 1000;
328 p2p->pending_listen_usec = (timeout % 1000) * 1000;
329
330 if (p2p->p2p_scan_running) {
331 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
332 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
333 return 0;
334 }
335 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
336 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
337 return 0;
338 }
339
340 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
341 if (ies == NULL)
342 return -1;
343
344 p2p->pending_listen_freq = freq;
345
346 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
347 p2p_dbg(p2p, "Failed to start listen mode");
348 p2p->pending_listen_freq = 0;
349 wpabuf_free(ies);
350 return -1;
351 }
352 wpabuf_free(ies);
353
354 p2p_set_state(p2p, P2P_LISTEN_ONLY);
355
356 return 0;
357 }
358
359
p2p_device_clear_reported(struct p2p_data * p2p)360 static void p2p_device_clear_reported(struct p2p_data *p2p)
361 {
362 struct p2p_device *dev;
363 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
364 dev->flags &= ~P2P_DEV_REPORTED;
365 dev->sd_reqs = 0;
366 }
367 }
368
369
370 /**
371 * p2p_get_device - Fetch a peer entry
372 * @p2p: P2P module context from p2p_init()
373 * @addr: P2P Device Address of the peer
374 * Returns: Pointer to the device entry or %NULL if not found
375 */
p2p_get_device(struct p2p_data * p2p,const u8 * addr)376 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
377 {
378 struct p2p_device *dev;
379 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
380 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
381 return dev;
382 }
383 return NULL;
384 }
385
386
387 /**
388 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
389 * @p2p: P2P module context from p2p_init()
390 * @addr: P2P Interface Address of the peer
391 * Returns: Pointer to the device entry or %NULL if not found
392 */
p2p_get_device_interface(struct p2p_data * p2p,const u8 * addr)393 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
394 const u8 *addr)
395 {
396 struct p2p_device *dev;
397 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
398 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
399 return dev;
400 }
401 return NULL;
402 }
403
404
405 /**
406 * p2p_create_device - Create a peer entry
407 * @p2p: P2P module context from p2p_init()
408 * @addr: P2P Device Address of the peer
409 * Returns: Pointer to the device entry or %NULL on failure
410 *
411 * If there is already an entry for the peer, it will be returned instead of
412 * creating a new one.
413 */
p2p_create_device(struct p2p_data * p2p,const u8 * addr)414 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
415 const u8 *addr)
416 {
417 struct p2p_device *dev, *oldest = NULL;
418 size_t count = 0;
419
420 dev = p2p_get_device(p2p, addr);
421 if (dev)
422 return dev;
423
424 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
425 count++;
426 if (oldest == NULL ||
427 os_reltime_before(&dev->last_seen, &oldest->last_seen))
428 oldest = dev;
429 }
430 if (count + 1 > p2p->cfg->max_peers && oldest) {
431 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
432 dl_list_del(&oldest->list);
433 p2p_device_free(p2p, oldest);
434 }
435
436 dev = os_zalloc(sizeof(*dev));
437 if (dev == NULL)
438 return NULL;
439 dl_list_add(&p2p->devices, &dev->list);
440 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
441
442 return dev;
443 }
444
445
p2p_copy_client_info(struct p2p_device * dev,struct p2p_client_info * cli)446 static void p2p_copy_client_info(struct p2p_device *dev,
447 struct p2p_client_info *cli)
448 {
449 p2p_copy_filter_devname(dev->info.device_name,
450 sizeof(dev->info.device_name),
451 cli->dev_name, cli->dev_name_len);
452 dev->info.dev_capab = cli->dev_capab;
453 dev->info.config_methods = cli->config_methods;
454 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
455 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
456 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
457 dev->info.wps_sec_dev_type_list_len);
458 }
459
460
p2p_add_group_clients(struct p2p_data * p2p,const u8 * go_dev_addr,const u8 * go_interface_addr,int freq,const u8 * gi,size_t gi_len,struct os_reltime * rx_time)461 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
462 const u8 *go_interface_addr, int freq,
463 const u8 *gi, size_t gi_len,
464 struct os_reltime *rx_time)
465 {
466 struct p2p_group_info info;
467 size_t c;
468 struct p2p_device *dev;
469
470 if (gi == NULL)
471 return 0;
472
473 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
474 return -1;
475
476 /*
477 * Clear old data for this group; if the devices are still in the
478 * group, the information will be restored in the loop following this.
479 */
480 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
481 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
482 ETH_ALEN) == 0) {
483 os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
484 os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
485 }
486 }
487
488 for (c = 0; c < info.num_clients; c++) {
489 struct p2p_client_info *cli = &info.client[c];
490 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
491 ETH_ALEN) == 0)
492 continue; /* ignore our own entry */
493 dev = p2p_get_device(p2p, cli->p2p_device_addr);
494 if (dev) {
495 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
496 P2P_DEV_PROBE_REQ_ONLY)) {
497 /*
498 * Update information since we have not
499 * received this directly from the client.
500 */
501 p2p_copy_client_info(dev, cli);
502 } else {
503 /*
504 * Need to update P2P Client Discoverability
505 * flag since it is valid only in P2P Group
506 * Info attribute.
507 */
508 dev->info.dev_capab &=
509 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
510 dev->info.dev_capab |=
511 cli->dev_capab &
512 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
513 }
514 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
515 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
516 }
517 } else {
518 dev = p2p_create_device(p2p, cli->p2p_device_addr);
519 if (dev == NULL)
520 continue;
521 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
522 p2p_copy_client_info(dev, cli);
523 dev->oper_freq = freq;
524 p2p->cfg->dev_found(p2p->cfg->cb_ctx,
525 dev->info.p2p_device_addr,
526 &dev->info, 1);
527 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
528 }
529
530 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
531 ETH_ALEN);
532 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
533 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
534 os_memcpy(dev->member_in_go_iface, go_interface_addr,
535 ETH_ALEN);
536 dev->flags |= P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT;
537 }
538
539 return 0;
540 }
541
542
p2p_copy_wps_info(struct p2p_data * p2p,struct p2p_device * dev,int probe_req,const struct p2p_message * msg)543 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
544 int probe_req, const struct p2p_message *msg)
545 {
546 os_memcpy(dev->info.device_name, msg->device_name,
547 sizeof(dev->info.device_name));
548
549 if (msg->manufacturer &&
550 msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
551 os_memset(dev->info.manufacturer, 0,
552 sizeof(dev->info.manufacturer));
553 os_memcpy(dev->info.manufacturer, msg->manufacturer,
554 msg->manufacturer_len);
555 }
556
557 if (msg->model_name &&
558 msg->model_name_len < sizeof(dev->info.model_name)) {
559 os_memset(dev->info.model_name, 0,
560 sizeof(dev->info.model_name));
561 os_memcpy(dev->info.model_name, msg->model_name,
562 msg->model_name_len);
563 }
564
565 if (msg->model_number &&
566 msg->model_number_len < sizeof(dev->info.model_number)) {
567 os_memset(dev->info.model_number, 0,
568 sizeof(dev->info.model_number));
569 os_memcpy(dev->info.model_number, msg->model_number,
570 msg->model_number_len);
571 }
572
573 if (msg->serial_number &&
574 msg->serial_number_len < sizeof(dev->info.serial_number)) {
575 os_memset(dev->info.serial_number, 0,
576 sizeof(dev->info.serial_number));
577 os_memcpy(dev->info.serial_number, msg->serial_number,
578 msg->serial_number_len);
579 }
580
581 if (msg->pri_dev_type)
582 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
583 sizeof(dev->info.pri_dev_type));
584 else if (msg->wps_pri_dev_type)
585 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
586 sizeof(dev->info.pri_dev_type));
587
588 if (msg->wps_sec_dev_type_list) {
589 os_memcpy(dev->info.wps_sec_dev_type_list,
590 msg->wps_sec_dev_type_list,
591 msg->wps_sec_dev_type_list_len);
592 dev->info.wps_sec_dev_type_list_len =
593 msg->wps_sec_dev_type_list_len;
594 }
595
596 if (msg->capability) {
597 /*
598 * P2P Client Discoverability bit is reserved in all frames
599 * that use this function, so do not change its value here.
600 */
601 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
602 dev->info.dev_capab |= msg->capability[0] &
603 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
604 dev->info.group_capab = msg->capability[1];
605 }
606
607 if (msg->ext_listen_timing) {
608 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
609 dev->ext_listen_interval =
610 WPA_GET_LE16(msg->ext_listen_timing + 2);
611 }
612
613 if (!probe_req) {
614 u16 new_config_methods;
615 new_config_methods = msg->config_methods ?
616 msg->config_methods : msg->wps_config_methods;
617 if (new_config_methods &&
618 dev->info.config_methods != new_config_methods) {
619 p2p_dbg(p2p, "Update peer " MACSTR
620 " config_methods 0x%x -> 0x%x",
621 MAC2STR(dev->info.p2p_device_addr),
622 dev->info.config_methods,
623 new_config_methods);
624 dev->info.config_methods = new_config_methods;
625 }
626 }
627 }
628
629
p2p_update_peer_vendor_elems(struct p2p_device * dev,const u8 * ies,size_t ies_len)630 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
631 size_t ies_len)
632 {
633 const u8 *pos, *end;
634 u8 id, len;
635
636 wpabuf_free(dev->info.vendor_elems);
637 dev->info.vendor_elems = NULL;
638
639 end = ies + ies_len;
640
641 for (pos = ies; end - pos > 1; pos += len) {
642 id = *pos++;
643 len = *pos++;
644
645 if (len > end - pos)
646 break;
647
648 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
649 continue;
650
651 if (len >= 4) {
652 u32 type = WPA_GET_BE32(pos);
653
654 if (type == WPA_IE_VENDOR_TYPE ||
655 type == WMM_IE_VENDOR_TYPE ||
656 type == WPS_IE_VENDOR_TYPE ||
657 type == P2P_IE_VENDOR_TYPE ||
658 type == WFD_IE_VENDOR_TYPE)
659 continue;
660 }
661
662 /* Unknown vendor element - make raw IE data available */
663 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
664 break;
665 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
666 }
667 }
668
669
p2p_compare_wfd_info(struct p2p_device * dev,const struct p2p_message * msg)670 static int p2p_compare_wfd_info(struct p2p_device *dev,
671 const struct p2p_message *msg)
672 {
673 if (dev->info.wfd_subelems && msg->wfd_subelems) {
674 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
675 return 1;
676
677 return os_memcmp(dev->info.wfd_subelems->buf,
678 msg->wfd_subelems->buf,
679 dev->info.wfd_subelems->used);
680 }
681 if (dev->info.wfd_subelems || msg->wfd_subelems)
682 return 1;
683
684 return 0;
685 }
686
687
688 /**
689 * p2p_add_device - Add peer entries based on scan results or P2P frames
690 * @p2p: P2P module context from p2p_init()
691 * @addr: Source address of Beacon or Probe Response frame (may be either
692 * P2P Device Address or P2P Interface Address)
693 * @level: Signal level (signal strength of the received frame from the peer)
694 * @freq: Frequency on which the Beacon or Probe Response frame was received
695 * @rx_time: Time when the result was received
696 * @ies: IEs from the Beacon or Probe Response frame
697 * @ies_len: Length of ies buffer in octets
698 * @scan_res: Whether this was based on scan results
699 * Returns: 0 on success, -1 on failure
700 *
701 * If the scan result is for a GO, the clients in the group will also be added
702 * to the peer table. This function can also be used with some other frames
703 * like Provision Discovery Request that contains P2P Capability and P2P Device
704 * Info attributes.
705 */
p2p_add_device(struct p2p_data * p2p,const u8 * addr,int freq,struct os_reltime * rx_time,int level,const u8 * ies,size_t ies_len,int scan_res)706 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
707 struct os_reltime *rx_time, int level, const u8 *ies,
708 size_t ies_len, int scan_res)
709 {
710 struct p2p_device *dev;
711 struct p2p_message msg;
712 const u8 *p2p_dev_addr;
713 int wfd_changed;
714 int dev_name_changed;
715 int i;
716 struct os_reltime time_now;
717
718 os_memset(&msg, 0, sizeof(msg));
719 if (p2p_parse_ies(ies, ies_len, &msg)) {
720 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
721 p2p_parse_free(&msg);
722 return -1;
723 }
724
725 if (msg.p2p_device_addr)
726 p2p_dev_addr = msg.p2p_device_addr;
727 else if (msg.device_id)
728 p2p_dev_addr = msg.device_id;
729 else {
730 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
731 p2p_parse_free(&msg);
732 return -1;
733 }
734
735 if (!is_zero_ether_addr(p2p->peer_filter) &&
736 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
737 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
738 " due to peer filter", MAC2STR(p2p_dev_addr));
739 p2p_parse_free(&msg);
740 return 0;
741 }
742
743 dev = p2p_create_device(p2p, p2p_dev_addr);
744 if (dev == NULL) {
745 p2p_parse_free(&msg);
746 return -1;
747 }
748
749 if (rx_time == NULL) {
750 os_get_reltime(&time_now);
751 rx_time = &time_now;
752 }
753
754 /*
755 * Update the device entry only if the new peer
756 * entry is newer than the one previously stored, or if
757 * the device was previously seen as a P2P Client in a group
758 * and the new entry isn't older than a threshold.
759 */
760 if (dev->last_seen.sec > 0 &&
761 os_reltime_before(rx_time, &dev->last_seen) &&
762 (!(dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT) ||
763 os_reltime_expired(&dev->last_seen, rx_time,
764 P2P_DEV_GROUP_CLIENT_RESP_THRESHOLD))) {
765 p2p_dbg(p2p,
766 "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u flags=0x%x)",
767 (unsigned int) rx_time->sec,
768 (unsigned int) rx_time->usec,
769 (unsigned int) dev->last_seen.sec,
770 (unsigned int) dev->last_seen.usec,
771 dev->flags);
772 p2p_parse_free(&msg);
773 return -1;
774 }
775
776 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
777
778 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY |
779 P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT);
780
781 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
782 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
783 if (msg.ssid &&
784 msg.ssid[1] <= sizeof(dev->oper_ssid) &&
785 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
786 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
787 != 0)) {
788 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
789 dev->oper_ssid_len = msg.ssid[1];
790 }
791
792 wpabuf_free(dev->info.p2ps_instance);
793 dev->info.p2ps_instance = NULL;
794 if (msg.adv_service_instance && msg.adv_service_instance_len)
795 dev->info.p2ps_instance = wpabuf_alloc_copy(
796 msg.adv_service_instance, msg.adv_service_instance_len);
797
798 if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
799 *msg.ds_params >= 1 && *msg.ds_params <= 14) {
800 int ds_freq;
801 if (*msg.ds_params == 14)
802 ds_freq = 2484;
803 else
804 ds_freq = 2407 + *msg.ds_params * 5;
805 if (freq != ds_freq) {
806 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
807 freq, ds_freq);
808 freq = ds_freq;
809 }
810 }
811
812 if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
813 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
814 MACSTR " %d -> %d MHz (DS param %d)",
815 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
816 freq, msg.ds_params ? *msg.ds_params : -1);
817 }
818 if (scan_res) {
819 dev->listen_freq = freq;
820 if (msg.group_info)
821 dev->oper_freq = freq;
822 }
823 dev->info.level = level;
824
825 dev_name_changed = os_strncmp(dev->info.device_name, msg.device_name,
826 WPS_DEV_NAME_MAX_LEN) != 0;
827
828 p2p_copy_wps_info(p2p, dev, 0, &msg);
829
830 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
831 wpabuf_free(dev->info.wps_vendor_ext[i]);
832 dev->info.wps_vendor_ext[i] = NULL;
833 }
834
835 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
836 if (msg.wps_vendor_ext[i] == NULL)
837 break;
838 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
839 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
840 if (dev->info.wps_vendor_ext[i] == NULL)
841 break;
842 }
843
844 wfd_changed = p2p_compare_wfd_info(dev, &msg);
845
846 if (wfd_changed) {
847 wpabuf_free(dev->info.wfd_subelems);
848 if (msg.wfd_subelems)
849 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
850 else
851 dev->info.wfd_subelems = NULL;
852 }
853
854 if (scan_res) {
855 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
856 msg.group_info, msg.group_info_len,
857 rx_time);
858 }
859
860 p2p_parse_free(&msg);
861
862 p2p_update_peer_vendor_elems(dev, ies, ies_len);
863
864 if (dev->flags & P2P_DEV_REPORTED && !wfd_changed &&
865 !dev_name_changed &&
866 (!msg.adv_service_instance ||
867 (dev->flags & P2P_DEV_P2PS_REPORTED)))
868 return 0;
869
870 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
871 freq, (unsigned int) rx_time->sec,
872 (unsigned int) rx_time->usec);
873 if (dev->flags & P2P_DEV_USER_REJECTED) {
874 p2p_dbg(p2p, "Do not report rejected device");
875 return 0;
876 }
877
878 if (dev->info.config_methods == 0 &&
879 (freq == 2412 || freq == 2437 || freq == 2462)) {
880 /*
881 * If we have only seen a Beacon frame from a GO, we do not yet
882 * know what WPS config methods it supports. Since some
883 * applications use config_methods value from P2P-DEVICE-FOUND
884 * events, postpone reporting this peer until we've fully
885 * discovered its capabilities.
886 *
887 * At least for now, do this only if the peer was detected on
888 * one of the social channels since that peer can be easily be
889 * found again and there are no limitations of having to use
890 * passive scan on this channels, so this can be done through
891 * Probe Response frame that includes the config_methods
892 * information.
893 */
894 p2p_dbg(p2p, "Do not report peer " MACSTR
895 " with unknown config methods", MAC2STR(addr));
896 return 0;
897 }
898
899 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
900 !(dev->flags & P2P_DEV_REPORTED_ONCE));
901 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
902
903 if (msg.adv_service_instance)
904 dev->flags |= P2P_DEV_P2PS_REPORTED;
905
906 return 0;
907 }
908
909
p2p_device_free(struct p2p_data * p2p,struct p2p_device * dev)910 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
911 {
912 int i;
913
914 if (p2p->go_neg_peer == dev) {
915 /*
916 * If GO Negotiation is in progress, report that it has failed.
917 */
918 p2p_go_neg_failed(p2p, -1);
919 }
920 if (p2p->invite_peer == dev)
921 p2p->invite_peer = NULL;
922 if (p2p->sd_peer == dev)
923 p2p->sd_peer = NULL;
924 if (p2p->pending_client_disc_go == dev)
925 p2p->pending_client_disc_go = NULL;
926
927 /* dev_lost() device, but only if it was previously dev_found() */
928 if (dev->flags & P2P_DEV_REPORTED_ONCE)
929 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
930 dev->info.p2p_device_addr);
931
932 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
933 wpabuf_free(dev->info.wps_vendor_ext[i]);
934 dev->info.wps_vendor_ext[i] = NULL;
935 }
936
937 wpabuf_free(dev->info.wfd_subelems);
938 wpabuf_free(dev->info.vendor_elems);
939 wpabuf_free(dev->go_neg_conf);
940 wpabuf_free(dev->info.p2ps_instance);
941
942 os_free(dev);
943 }
944
945
p2p_get_next_prog_freq(struct p2p_data * p2p)946 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
947 {
948 struct p2p_channels *c;
949 struct p2p_reg_class *cla;
950 size_t cl, ch;
951 int found = 0;
952 u8 reg_class;
953 u8 channel;
954 int freq;
955
956 c = &p2p->cfg->channels;
957 for (cl = 0; cl < c->reg_classes; cl++) {
958 cla = &c->reg_class[cl];
959 if (cla->reg_class != p2p->last_prog_scan_class)
960 continue;
961 for (ch = 0; ch < cla->channels; ch++) {
962 if (cla->channel[ch] == p2p->last_prog_scan_chan) {
963 found = 1;
964 break;
965 }
966 }
967 if (found)
968 break;
969 }
970
971 if (!found) {
972 /* Start from beginning */
973 reg_class = c->reg_class[0].reg_class;
974 channel = c->reg_class[0].channel[0];
975 } else {
976 /* Pick the next channel */
977 ch++;
978 if (ch == cla->channels) {
979 cl++;
980 if (cl == c->reg_classes)
981 cl = 0;
982 ch = 0;
983 }
984 reg_class = c->reg_class[cl].reg_class;
985 channel = c->reg_class[cl].channel[ch];
986 }
987
988 freq = p2p_channel_to_freq(reg_class, channel);
989 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
990 reg_class, channel, freq);
991 p2p->last_prog_scan_class = reg_class;
992 p2p->last_prog_scan_chan = channel;
993
994 if (freq == 2412 || freq == 2437 || freq == 2462)
995 return 0; /* No need to add social channels */
996 return freq;
997 }
998
999
p2p_search(struct p2p_data * p2p)1000 static void p2p_search(struct p2p_data *p2p)
1001 {
1002 int freq = 0;
1003 enum p2p_scan_type type;
1004 u16 pw_id = DEV_PW_DEFAULT;
1005 int res;
1006
1007 if (p2p->drv_in_listen) {
1008 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
1009 return;
1010 }
1011 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1012
1013 if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
1014 (freq = p2p_get_next_prog_freq(p2p)) > 0) {
1015 type = P2P_SCAN_SOCIAL_PLUS_ONE;
1016 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
1017 } else {
1018 type = P2P_SCAN_SOCIAL;
1019 p2p_dbg(p2p, "Starting search");
1020 }
1021
1022 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
1023 p2p->num_req_dev_types, p2p->req_dev_types,
1024 p2p->find_dev_id, pw_id);
1025 if (res < 0) {
1026 p2p_dbg(p2p, "Scan request schedule failed");
1027 p2p_continue_find(p2p);
1028 }
1029 }
1030
1031
p2p_find_timeout(void * eloop_ctx,void * timeout_ctx)1032 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
1033 {
1034 struct p2p_data *p2p = eloop_ctx;
1035 p2p_dbg(p2p, "Find timeout -> stop");
1036 p2p_stop_find(p2p);
1037 }
1038
1039
p2p_notify_scan_trigger_status(struct p2p_data * p2p,int status)1040 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
1041 {
1042 if (status != 0) {
1043 p2p_dbg(p2p, "Scan request failed");
1044 /* Do continue find even for the first p2p_find_scan */
1045 p2p_continue_find(p2p);
1046 } else {
1047 p2p_dbg(p2p, "Running p2p_scan");
1048 p2p->p2p_scan_running = 1;
1049 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1050 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1051 p2p, NULL);
1052 }
1053 }
1054
1055
p2p_run_after_scan(struct p2p_data * p2p)1056 static int p2p_run_after_scan(struct p2p_data *p2p)
1057 {
1058 struct p2p_device *dev;
1059 enum p2p_after_scan op;
1060
1061 if (p2p->after_scan_tx) {
1062 p2p->after_scan_tx_in_progress = 1;
1063 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1064 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1065 p2p->after_scan_tx->freq,
1066 p2p->after_scan_tx->dst,
1067 p2p->after_scan_tx->src,
1068 p2p->after_scan_tx->bssid,
1069 (u8 *) (p2p->after_scan_tx + 1),
1070 p2p->after_scan_tx->len,
1071 p2p->after_scan_tx->wait_time);
1072 os_free(p2p->after_scan_tx);
1073 p2p->after_scan_tx = NULL;
1074 return 1;
1075 }
1076
1077 op = p2p->start_after_scan;
1078 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1079 switch (op) {
1080 case P2P_AFTER_SCAN_NOTHING:
1081 break;
1082 case P2P_AFTER_SCAN_LISTEN:
1083 p2p_dbg(p2p, "Start previously requested Listen state");
1084 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1085 p2p->pending_listen_usec / 1000);
1086 return 1;
1087 case P2P_AFTER_SCAN_CONNECT:
1088 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1089 MAC2STR(p2p->after_scan_peer));
1090 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1091 if (dev == NULL) {
1092 p2p_dbg(p2p, "Peer not known anymore");
1093 break;
1094 }
1095 p2p_connect_send(p2p, dev);
1096 return 1;
1097 }
1098
1099 return 0;
1100 }
1101
1102
p2p_scan_timeout(void * eloop_ctx,void * timeout_ctx)1103 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1104 {
1105 struct p2p_data *p2p = eloop_ctx;
1106 int running;
1107 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1108 running = p2p->p2p_scan_running;
1109 /* Make sure we recover from missed scan results callback */
1110 p2p->p2p_scan_running = 0;
1111
1112 if (running)
1113 p2p_run_after_scan(p2p);
1114 }
1115
1116
p2p_free_req_dev_types(struct p2p_data * p2p)1117 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1118 {
1119 p2p->num_req_dev_types = 0;
1120 os_free(p2p->req_dev_types);
1121 p2p->req_dev_types = NULL;
1122 }
1123
1124
p2ps_gen_hash(struct p2p_data * p2p,const char * str,u8 * hash)1125 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash)
1126 {
1127 u8 buf[SHA256_MAC_LEN];
1128 char str_buf[256];
1129 const u8 *adv_array;
1130 size_t i, adv_len;
1131
1132 if (!str || !hash)
1133 return 0;
1134
1135 if (!str[0]) {
1136 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1137 return 1;
1138 }
1139
1140 adv_array = (u8 *) str_buf;
1141 adv_len = os_strlen(str);
1142 if (adv_len >= sizeof(str_buf))
1143 return 0;
1144
1145 for (i = 0; i < adv_len; i++) {
1146 if (str[i] >= 'A' && str[i] <= 'Z')
1147 str_buf[i] = str[i] - 'A' + 'a';
1148 else
1149 str_buf[i] = str[i];
1150 }
1151
1152 if (sha256_vector(1, &adv_array, &adv_len, buf))
1153 return 0;
1154
1155 os_memcpy(hash, buf, P2PS_HASH_LEN);
1156 return 1;
1157 }
1158
1159
p2p_find(struct p2p_data * p2p,unsigned int timeout,enum p2p_discovery_type type,unsigned int num_req_dev_types,const u8 * req_dev_types,const u8 * dev_id,unsigned int search_delay,u8 seek_count,const char ** seek,int freq)1160 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1161 enum p2p_discovery_type type,
1162 unsigned int num_req_dev_types, const u8 *req_dev_types,
1163 const u8 *dev_id, unsigned int search_delay,
1164 u8 seek_count, const char **seek, int freq)
1165 {
1166 int res;
1167
1168 p2p_dbg(p2p, "Starting find (type=%d)", type);
1169 os_get_reltime(&p2p->find_start);
1170 if (p2p->p2p_scan_running) {
1171 p2p_dbg(p2p, "p2p_scan is already running");
1172 }
1173
1174 p2p_free_req_dev_types(p2p);
1175 if (req_dev_types && num_req_dev_types) {
1176 p2p->req_dev_types = os_malloc(num_req_dev_types *
1177 WPS_DEV_TYPE_LEN);
1178 if (p2p->req_dev_types == NULL)
1179 return -1;
1180 os_memcpy(p2p->req_dev_types, req_dev_types,
1181 num_req_dev_types * WPS_DEV_TYPE_LEN);
1182 p2p->num_req_dev_types = num_req_dev_types;
1183 }
1184
1185 if (dev_id) {
1186 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1187 p2p->find_dev_id = p2p->find_dev_id_buf;
1188 } else
1189 p2p->find_dev_id = NULL;
1190
1191 if (seek_count == 0 || !seek) {
1192 /* Not an ASP search */
1193 p2p->p2ps_seek = 0;
1194 } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) {
1195 /*
1196 * An empty seek string means no hash values, but still an ASP
1197 * search.
1198 */
1199 p2p_dbg(p2p, "ASP search");
1200 p2p->p2ps_seek_count = 0;
1201 p2p->p2ps_seek = 1;
1202 } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
1203 u8 buf[P2PS_HASH_LEN];
1204 int i, count = 0;
1205
1206 for (i = 0; i < seek_count; i++) {
1207 if (!p2ps_gen_hash(p2p, seek[i], buf))
1208 continue;
1209
1210 p2p_dbg(p2p, "Seek service %s hash " MACSTR,
1211 seek[i], MAC2STR(buf));
1212 os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN],
1213 buf, P2PS_HASH_LEN);
1214 count++;
1215 }
1216
1217 p2p->p2ps_seek_count = count;
1218 p2p->p2ps_seek = 1;
1219 } else {
1220 p2p->p2ps_seek_count = 0;
1221 p2p->p2ps_seek = 1;
1222 }
1223
1224 /* Special case to perform wildcard search */
1225 if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
1226 p2p->p2ps_seek_count = 1;
1227 os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash,
1228 P2PS_HASH_LEN);
1229 }
1230
1231 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1232 p2p_clear_timeout(p2p);
1233 if (p2p->pending_listen_freq) {
1234 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_find");
1235 p2p->pending_listen_freq = 0;
1236 }
1237 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1238 p2p->find_type = type;
1239 p2p_device_clear_reported(p2p);
1240 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN);
1241 p2p_set_state(p2p, P2P_SEARCH);
1242 p2p->search_delay = search_delay;
1243 p2p->in_search_delay = 0;
1244 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1245 p2p->last_p2p_find_timeout = timeout;
1246 if (timeout)
1247 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1248 p2p, NULL);
1249 switch (type) {
1250 case P2P_FIND_START_WITH_FULL:
1251 if (freq > 0) {
1252 /*
1253 * Start with the specified channel and then move to
1254 * social channels only scans.
1255 */
1256 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx,
1257 P2P_SCAN_SPECIFIC, freq,
1258 p2p->num_req_dev_types,
1259 p2p->req_dev_types, dev_id,
1260 DEV_PW_DEFAULT);
1261 break;
1262 }
1263 /* fall through */
1264 case P2P_FIND_PROGRESSIVE:
1265 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1266 p2p->num_req_dev_types,
1267 p2p->req_dev_types, dev_id,
1268 DEV_PW_DEFAULT);
1269 break;
1270 case P2P_FIND_ONLY_SOCIAL:
1271 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1272 p2p->num_req_dev_types,
1273 p2p->req_dev_types, dev_id,
1274 DEV_PW_DEFAULT);
1275 break;
1276 default:
1277 return -1;
1278 }
1279
1280 if (res != 0 && p2p->p2p_scan_running) {
1281 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1282 /* wait for the previous p2p_scan to complete */
1283 res = 0; /* do not report failure */
1284 } else if (res != 0) {
1285 p2p_dbg(p2p, "Failed to start p2p_scan");
1286 p2p_set_state(p2p, P2P_IDLE);
1287 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1288 }
1289
1290 return res;
1291 }
1292
1293
p2p_stop_find_for_freq(struct p2p_data * p2p,int freq)1294 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1295 {
1296 p2p_dbg(p2p, "Stopping find");
1297 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1298 p2p_clear_timeout(p2p);
1299 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
1300 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1301
1302 p2p->p2ps_seek_count = 0;
1303
1304 p2p_set_state(p2p, P2P_IDLE);
1305 p2p_free_req_dev_types(p2p);
1306 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1307 if (p2p->go_neg_peer)
1308 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1309 p2p->go_neg_peer = NULL;
1310 p2p->sd_peer = NULL;
1311 p2p->invite_peer = NULL;
1312 p2p_stop_listen_for_freq(p2p, freq);
1313 p2p->send_action_in_progress = 0;
1314 }
1315
1316
p2p_stop_listen_for_freq(struct p2p_data * p2p,int freq)1317 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1318 {
1319 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1320 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1321 return;
1322 }
1323 if (p2p->in_listen) {
1324 p2p->in_listen = 0;
1325 p2p_clear_timeout(p2p);
1326 }
1327 if (p2p->drv_in_listen) {
1328 /*
1329 * The driver may not deliver callback to p2p_listen_end()
1330 * when the operation gets canceled, so clear the internal
1331 * variable that is tracking driver state.
1332 */
1333 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1334 p2p->drv_in_listen = 0;
1335 }
1336 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1337 }
1338
1339
p2p_stop_listen(struct p2p_data * p2p)1340 void p2p_stop_listen(struct p2p_data *p2p)
1341 {
1342 if (p2p->state != P2P_LISTEN_ONLY) {
1343 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1344 return;
1345 }
1346
1347 p2p_stop_listen_for_freq(p2p, 0);
1348 p2p_set_state(p2p, P2P_IDLE);
1349 }
1350
1351
p2p_stop_find(struct p2p_data * p2p)1352 void p2p_stop_find(struct p2p_data *p2p)
1353 {
1354 p2p->pending_listen_freq = 0;
1355 p2p_stop_find_for_freq(p2p, 0);
1356 }
1357
1358
p2p_prepare_channel_pref(struct p2p_data * p2p,unsigned int force_freq,unsigned int pref_freq,int go)1359 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1360 unsigned int force_freq,
1361 unsigned int pref_freq, int go)
1362 {
1363 u8 op_class, op_channel;
1364 unsigned int freq = force_freq ? force_freq : pref_freq;
1365
1366 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1367 force_freq, pref_freq, go);
1368 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1369 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1370 return -1;
1371 }
1372
1373 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1374 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1375 op_channel))) {
1376 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1377 freq, op_class, op_channel);
1378 return -1;
1379 }
1380
1381 p2p->op_reg_class = op_class;
1382 p2p->op_channel = op_channel;
1383
1384 if (force_freq) {
1385 p2p->channels.reg_classes = 1;
1386 p2p->channels.reg_class[0].channels = 1;
1387 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1388 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1389 } else {
1390 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1391 sizeof(struct p2p_channels));
1392 }
1393
1394 return 0;
1395 }
1396
1397
p2p_prepare_channel_best(struct p2p_data * p2p)1398 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1399 {
1400 u8 op_class, op_channel;
1401 const int op_classes_5ghz[] = { 124, 125, 115, 0 };
1402 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1403 const int op_classes_vht[] = { 128, 0 };
1404
1405 p2p_dbg(p2p, "Prepare channel best");
1406
1407 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1408 p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1409 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1410 == 0) {
1411 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1412 p2p->op_reg_class = op_class;
1413 p2p->op_channel = op_channel;
1414 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1415 p2p_supported_freq(p2p, p2p->best_freq_5) &&
1416 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1417 == 0) {
1418 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1419 p2p->op_reg_class = op_class;
1420 p2p->op_channel = op_channel;
1421 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1422 p2p_supported_freq(p2p, p2p->best_freq_24) &&
1423 p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1424 &op_channel) == 0) {
1425 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1426 p2p->op_reg_class = op_class;
1427 p2p->op_channel = op_channel;
1428 } else if (p2p->cfg->num_pref_chan > 0 &&
1429 p2p_channels_includes(&p2p->cfg->channels,
1430 p2p->cfg->pref_chan[0].op_class,
1431 p2p->cfg->pref_chan[0].chan)) {
1432 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1433 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1434 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1435 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1436 &p2p->op_reg_class, &p2p->op_channel) ==
1437 0) {
1438 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1439 p2p->op_reg_class, p2p->op_channel);
1440 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1441 &p2p->op_reg_class, &p2p->op_channel) ==
1442 0) {
1443 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1444 p2p->op_reg_class, p2p->op_channel);
1445 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1446 &p2p->op_reg_class, &p2p->op_channel) ==
1447 0) {
1448 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1449 p2p->op_reg_class, p2p->op_channel);
1450 } else if (p2p_channels_includes(&p2p->cfg->channels,
1451 p2p->cfg->op_reg_class,
1452 p2p->cfg->op_channel)) {
1453 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1454 p2p->op_reg_class = p2p->cfg->op_reg_class;
1455 p2p->op_channel = p2p->cfg->op_channel;
1456 } else if (p2p_channel_random_social(&p2p->cfg->channels,
1457 &p2p->op_reg_class,
1458 &p2p->op_channel) == 0) {
1459 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1460 p2p->op_reg_class, p2p->op_channel);
1461 } else {
1462 /* Select any random available channel from the first available
1463 * operating class */
1464 p2p_channel_select(&p2p->cfg->channels, NULL,
1465 &p2p->op_reg_class,
1466 &p2p->op_channel);
1467 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1468 p2p->op_channel, p2p->op_reg_class);
1469 }
1470
1471 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1472 sizeof(struct p2p_channels));
1473 }
1474
1475
1476 /**
1477 * p2p_prepare_channel - Select operating channel for GO Negotiation or P2PS PD
1478 * @p2p: P2P module context from p2p_init()
1479 * @dev: Selected peer device
1480 * @force_freq: Forced frequency in MHz or 0 if not forced
1481 * @pref_freq: Preferred frequency in MHz or 0 if no preference
1482 * @go: Whether the local end will be forced to be GO
1483 * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1484 *
1485 * This function is used to do initial operating channel selection for GO
1486 * Negotiation prior to having received peer information or for P2PS PD
1487 * signalling. The selected channel may be further optimized in
1488 * p2p_reselect_channel() once the peer information is available.
1489 */
p2p_prepare_channel(struct p2p_data * p2p,struct p2p_device * dev,unsigned int force_freq,unsigned int pref_freq,int go)1490 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1491 unsigned int force_freq, unsigned int pref_freq, int go)
1492 {
1493 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1494 force_freq, pref_freq, go);
1495 if (force_freq || pref_freq) {
1496 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1497 0)
1498 return -1;
1499 } else {
1500 p2p_prepare_channel_best(p2p);
1501 }
1502 p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1503 if (go)
1504 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1505 else if (!force_freq)
1506 p2p_channels_union_inplace(&p2p->channels,
1507 &p2p->cfg->cli_channels);
1508 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1509
1510 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1511 p2p->op_reg_class, p2p->op_channel,
1512 force_freq ? " (forced)" : "");
1513
1514 if (force_freq)
1515 dev->flags |= P2P_DEV_FORCE_FREQ;
1516 else
1517 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1518
1519 return 0;
1520 }
1521
1522
p2p_set_dev_persistent(struct p2p_device * dev,int persistent_group)1523 static void p2p_set_dev_persistent(struct p2p_device *dev,
1524 int persistent_group)
1525 {
1526 switch (persistent_group) {
1527 case 0:
1528 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1529 P2P_DEV_PREFER_PERSISTENT_RECONN);
1530 break;
1531 case 1:
1532 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1533 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1534 break;
1535 case 2:
1536 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1537 P2P_DEV_PREFER_PERSISTENT_RECONN;
1538 break;
1539 }
1540 }
1541
1542
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)1543 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1544 enum p2p_wps_method wps_method,
1545 int go_intent, const u8 *own_interface_addr,
1546 unsigned int force_freq, int persistent_group,
1547 const u8 *force_ssid, size_t force_ssid_len,
1548 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1549 {
1550 struct p2p_device *dev;
1551
1552 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1553 " GO Intent=%d Intended Interface Address=" MACSTR
1554 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1555 "oob_pw_id=%u",
1556 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1557 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1558
1559 dev = p2p_get_device(p2p, peer_addr);
1560 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1561 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1562 MAC2STR(peer_addr));
1563 return -1;
1564 }
1565
1566 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1567 go_intent == 15) < 0)
1568 return -1;
1569
1570 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1571 if (!(dev->info.dev_capab &
1572 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1573 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1574 " that is in a group and is not discoverable",
1575 MAC2STR(peer_addr));
1576 return -1;
1577 }
1578 if (dev->oper_freq <= 0) {
1579 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1580 " with incomplete information",
1581 MAC2STR(peer_addr));
1582 return -1;
1583 }
1584
1585 /*
1586 * First, try to connect directly. If the peer does not
1587 * acknowledge frames, assume it is sleeping and use device
1588 * discoverability via the GO at that point.
1589 */
1590 }
1591
1592 p2p->ssid_set = 0;
1593 if (force_ssid) {
1594 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1595 force_ssid, force_ssid_len);
1596 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1597 p2p->ssid_len = force_ssid_len;
1598 p2p->ssid_set = 1;
1599 }
1600
1601 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1602 dev->flags &= ~P2P_DEV_USER_REJECTED;
1603 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1604 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1605 if (pd_before_go_neg)
1606 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1607 else {
1608 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1609 /*
1610 * Assign dialog token and tie breaker here to use the same
1611 * values in each retry within the same GO Negotiation exchange.
1612 */
1613 dev->dialog_token++;
1614 if (dev->dialog_token == 0)
1615 dev->dialog_token = 1;
1616 dev->tie_breaker = p2p->next_tie_breaker;
1617 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1618 }
1619 dev->connect_reqs = 0;
1620 dev->go_neg_req_sent = 0;
1621 dev->go_state = UNKNOWN_GO;
1622 p2p_set_dev_persistent(dev, persistent_group);
1623 p2p->go_intent = go_intent;
1624 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1625
1626 if (p2p->state != P2P_IDLE)
1627 p2p_stop_find(p2p);
1628
1629 if (p2p->after_scan_tx) {
1630 /*
1631 * We need to drop the pending frame to avoid issues with the
1632 * new GO Negotiation, e.g., when the pending frame was from a
1633 * previous attempt at starting a GO Negotiation.
1634 */
1635 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1636 os_free(p2p->after_scan_tx);
1637 p2p->after_scan_tx = NULL;
1638 }
1639
1640 dev->wps_method = wps_method;
1641 dev->oob_pw_id = oob_pw_id;
1642 dev->status = P2P_SC_SUCCESS;
1643
1644 if (p2p->p2p_scan_running) {
1645 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1646 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1647 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1648 return 0;
1649 }
1650 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1651
1652 return p2p_connect_send(p2p, dev);
1653 }
1654
1655
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)1656 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1657 enum p2p_wps_method wps_method,
1658 int go_intent, const u8 *own_interface_addr,
1659 unsigned int force_freq, int persistent_group,
1660 const u8 *force_ssid, size_t force_ssid_len,
1661 unsigned int pref_freq, u16 oob_pw_id)
1662 {
1663 struct p2p_device *dev;
1664
1665 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1666 " GO Intent=%d Intended Interface Address=" MACSTR
1667 " wps_method=%d persistent_group=%d oob_pw_id=%u",
1668 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1669 wps_method, persistent_group, oob_pw_id);
1670
1671 dev = p2p_get_device(p2p, peer_addr);
1672 if (dev == NULL) {
1673 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1674 MAC2STR(peer_addr));
1675 return -1;
1676 }
1677
1678 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1679 15) < 0)
1680 return -1;
1681
1682 p2p->ssid_set = 0;
1683 if (force_ssid) {
1684 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1685 force_ssid, force_ssid_len);
1686 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1687 p2p->ssid_len = force_ssid_len;
1688 p2p->ssid_set = 1;
1689 }
1690
1691 dev->flags &= ~P2P_DEV_NOT_YET_READY;
1692 dev->flags &= ~P2P_DEV_USER_REJECTED;
1693 dev->go_neg_req_sent = 0;
1694 dev->go_state = UNKNOWN_GO;
1695 p2p_set_dev_persistent(dev, persistent_group);
1696 p2p->go_intent = go_intent;
1697 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1698
1699 dev->wps_method = wps_method;
1700 dev->oob_pw_id = oob_pw_id;
1701 dev->status = P2P_SC_SUCCESS;
1702
1703 return 0;
1704 }
1705
1706
p2p_add_dev_info(struct p2p_data * p2p,const u8 * addr,struct p2p_device * dev,struct p2p_message * msg)1707 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1708 struct p2p_device *dev, struct p2p_message *msg)
1709 {
1710 os_get_reltime(&dev->last_seen);
1711
1712 p2p_copy_wps_info(p2p, dev, 0, msg);
1713
1714 if (msg->listen_channel) {
1715 int freq;
1716 freq = p2p_channel_to_freq(msg->listen_channel[3],
1717 msg->listen_channel[4]);
1718 if (freq < 0) {
1719 p2p_dbg(p2p, "Unknown peer Listen channel: "
1720 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1721 msg->listen_channel[0],
1722 msg->listen_channel[1],
1723 msg->listen_channel[2],
1724 msg->listen_channel[3],
1725 msg->listen_channel[4]);
1726 } else {
1727 p2p_dbg(p2p, "Update peer " MACSTR
1728 " Listen channel: %u -> %u MHz",
1729 MAC2STR(dev->info.p2p_device_addr),
1730 dev->listen_freq, freq);
1731 dev->listen_freq = freq;
1732 }
1733 }
1734
1735 if (msg->wfd_subelems) {
1736 wpabuf_free(dev->info.wfd_subelems);
1737 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1738 }
1739
1740 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1741 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1742 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1743 } else {
1744 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1745 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1746 "listen_freq=%d",
1747 MAC2STR(dev->info.p2p_device_addr),
1748 dev->info.dev_capab, dev->info.group_capab,
1749 dev->info.device_name, dev->listen_freq);
1750 }
1751
1752 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1753
1754 if (dev->flags & P2P_DEV_USER_REJECTED) {
1755 p2p_dbg(p2p, "Do not report rejected device");
1756 return;
1757 }
1758
1759 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1760 !(dev->flags & P2P_DEV_REPORTED_ONCE));
1761 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1762 }
1763
1764
p2p_build_ssid(struct p2p_data * p2p,u8 * ssid,size_t * ssid_len)1765 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1766 {
1767 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1768 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1769 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1770 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1771 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1772 }
1773
1774
p2p_go_params(struct p2p_data * p2p,struct p2p_go_neg_results * params)1775 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1776 {
1777 if (p2p->ssid_set) {
1778 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len);
1779 params->ssid_len = p2p->ssid_len;
1780 } else {
1781 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len);
1782 }
1783 p2p->ssid_set = 0;
1784
1785 p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1786 return 0;
1787 }
1788
1789
p2p_go_complete(struct p2p_data * p2p,struct p2p_device * peer)1790 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1791 {
1792 struct p2p_go_neg_results res;
1793 int go = peer->go_state == LOCAL_GO;
1794 struct p2p_channels intersection;
1795
1796 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1797 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1798
1799 os_memset(&res, 0, sizeof(res));
1800 res.role_go = go;
1801 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1802 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1803 res.wps_method = peer->wps_method;
1804 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1805 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1806 res.persistent_group = 2;
1807 else
1808 res.persistent_group = 1;
1809 }
1810
1811 if (go) {
1812 /* Setup AP mode for WPS provisioning */
1813 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1814 p2p->op_channel);
1815 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1816 res.ssid_len = p2p->ssid_len;
1817 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1818 } else {
1819 res.freq = peer->oper_freq;
1820 if (p2p->ssid_len) {
1821 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1822 res.ssid_len = p2p->ssid_len;
1823 }
1824 }
1825
1826 p2p_channels_dump(p2p, "own channels", &p2p->channels);
1827 p2p_channels_dump(p2p, "peer channels", &peer->channels);
1828 p2p_channels_intersect(&p2p->channels, &peer->channels,
1829 &intersection);
1830 if (go) {
1831 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1832 p2p_channels_dump(p2p, "intersection after no-GO removal",
1833 &intersection);
1834 }
1835
1836 p2p_channels_to_freqs(&intersection, res.freq_list,
1837 P2P_MAX_CHANNELS);
1838
1839 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1840
1841 p2p_clear_timeout(p2p);
1842 p2p->ssid_set = 0;
1843 peer->go_neg_req_sent = 0;
1844 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1845 peer->wps_method = WPS_NOT_READY;
1846 peer->oob_pw_id = 0;
1847 wpabuf_free(peer->go_neg_conf);
1848 peer->go_neg_conf = NULL;
1849
1850 p2p_set_state(p2p, P2P_PROVISIONING);
1851 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1852 }
1853
1854
p2p_rx_p2p_action(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len,int rx_freq)1855 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1856 const u8 *data, size_t len, int rx_freq)
1857 {
1858 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1859 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1860
1861 if (len < 1)
1862 return;
1863
1864 switch (data[0]) {
1865 case P2P_GO_NEG_REQ:
1866 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1867 break;
1868 case P2P_GO_NEG_RESP:
1869 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1870 break;
1871 case P2P_GO_NEG_CONF:
1872 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1873 break;
1874 case P2P_INVITATION_REQ:
1875 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1876 rx_freq);
1877 break;
1878 case P2P_INVITATION_RESP:
1879 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1880 break;
1881 case P2P_PROV_DISC_REQ:
1882 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1883 break;
1884 case P2P_PROV_DISC_RESP:
1885 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1886 break;
1887 case P2P_DEV_DISC_REQ:
1888 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1889 break;
1890 case P2P_DEV_DISC_RESP:
1891 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1892 break;
1893 default:
1894 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1895 data[0]);
1896 break;
1897 }
1898 }
1899
1900
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)1901 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1902 const u8 *sa, const u8 *bssid, const u8 *data,
1903 size_t len, int freq)
1904 {
1905 if (len < 1)
1906 return;
1907
1908 switch (data[0]) {
1909 case WLAN_PA_VENDOR_SPECIFIC:
1910 data++;
1911 len--;
1912 if (len < 4)
1913 return;
1914 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1915 return;
1916
1917 data += 4;
1918 len -= 4;
1919
1920 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1921 break;
1922 case WLAN_PA_GAS_INITIAL_REQ:
1923 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1924 break;
1925 case WLAN_PA_GAS_INITIAL_RESP:
1926 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1927 break;
1928 case WLAN_PA_GAS_COMEBACK_REQ:
1929 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1930 break;
1931 case WLAN_PA_GAS_COMEBACK_RESP:
1932 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1933 break;
1934 }
1935 }
1936
1937
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)1938 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1939 const u8 *bssid, u8 category,
1940 const u8 *data, size_t len, int freq)
1941 {
1942 if (category == WLAN_ACTION_PUBLIC) {
1943 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1944 return;
1945 }
1946
1947 if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1948 return;
1949
1950 if (len < 4)
1951 return;
1952
1953 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1954 return;
1955 data += 4;
1956 len -= 4;
1957
1958 /* P2P action frame */
1959 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1960 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1961
1962 if (len < 1)
1963 return;
1964 switch (data[0]) {
1965 case P2P_NOA:
1966 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1967 /* TODO */
1968 break;
1969 case P2P_PRESENCE_REQ:
1970 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1971 break;
1972 case P2P_PRESENCE_RESP:
1973 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1974 break;
1975 case P2P_GO_DISC_REQ:
1976 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1977 break;
1978 default:
1979 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1980 break;
1981 }
1982 }
1983
1984
p2p_go_neg_start(void * eloop_ctx,void * timeout_ctx)1985 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1986 {
1987 struct p2p_data *p2p = eloop_ctx;
1988 if (p2p->go_neg_peer == NULL)
1989 return;
1990 if (p2p->pending_listen_freq) {
1991 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1992 p2p->pending_listen_freq = 0;
1993 }
1994 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1995 p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1996 /*
1997 * Set new timeout to make sure a previously set one does not expire
1998 * too quickly while waiting for the GO Negotiation to complete.
1999 */
2000 p2p_set_timeout(p2p, 0, 500000);
2001 p2p_connect_send(p2p, p2p->go_neg_peer);
2002 }
2003
2004
p2p_invite_start(void * eloop_ctx,void * timeout_ctx)2005 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
2006 {
2007 struct p2p_data *p2p = eloop_ctx;
2008 if (p2p->invite_peer == NULL)
2009 return;
2010 if (p2p->pending_listen_freq) {
2011 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
2012 p2p->pending_listen_freq = 0;
2013 }
2014 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
2015 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
2016 p2p->invite_dev_pw_id);
2017 }
2018
2019
p2p_add_dev_from_probe_req(struct p2p_data * p2p,const u8 * addr,const u8 * ie,size_t ie_len)2020 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
2021 const u8 *ie, size_t ie_len)
2022 {
2023 struct p2p_message msg;
2024 struct p2p_device *dev;
2025
2026 os_memset(&msg, 0, sizeof(msg));
2027 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
2028 {
2029 p2p_parse_free(&msg);
2030 return; /* not a P2P probe */
2031 }
2032
2033 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
2034 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
2035 != 0) {
2036 /* The Probe Request is not part of P2P Device Discovery. It is
2037 * not known whether the source address of the frame is the P2P
2038 * Device Address or P2P Interface Address. Do not add a new
2039 * peer entry based on this frames.
2040 */
2041 p2p_parse_free(&msg);
2042 return;
2043 }
2044
2045 dev = p2p_get_device(p2p, addr);
2046 if (dev) {
2047 if (msg.listen_channel) {
2048 int freq;
2049
2050 if (dev->country[0] == 0)
2051 os_memcpy(dev->country, msg.listen_channel, 3);
2052
2053 freq = p2p_channel_to_freq(msg.listen_channel[3],
2054 msg.listen_channel[4]);
2055
2056 if (freq > 0 && dev->listen_freq != freq) {
2057 p2p_dbg(p2p,
2058 "Updated peer " MACSTR " Listen channel (Probe Request): %d -> %d MHz",
2059 MAC2STR(addr), dev->listen_freq, freq);
2060 dev->listen_freq = freq;
2061 }
2062 }
2063
2064 os_get_reltime(&dev->last_seen);
2065 p2p_parse_free(&msg);
2066 return; /* already known */
2067 }
2068
2069 dev = p2p_create_device(p2p, addr);
2070 if (dev == NULL) {
2071 p2p_parse_free(&msg);
2072 return;
2073 }
2074
2075 os_get_reltime(&dev->last_seen);
2076 dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
2077
2078 if (msg.listen_channel) {
2079 os_memcpy(dev->country, msg.listen_channel, 3);
2080 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
2081 msg.listen_channel[4]);
2082 }
2083
2084 p2p_copy_wps_info(p2p, dev, 1, &msg);
2085
2086 if (msg.wfd_subelems) {
2087 wpabuf_free(dev->info.wfd_subelems);
2088 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
2089 }
2090
2091 p2p_parse_free(&msg);
2092
2093 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
2094 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
2095 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
2096 dev->info.group_capab, dev->info.device_name,
2097 dev->listen_freq);
2098 }
2099
2100
p2p_add_dev_from_go_neg_req(struct p2p_data * p2p,const u8 * addr,struct p2p_message * msg)2101 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
2102 const u8 *addr,
2103 struct p2p_message *msg)
2104 {
2105 struct p2p_device *dev;
2106
2107 dev = p2p_get_device(p2p, addr);
2108 if (dev) {
2109 os_get_reltime(&dev->last_seen);
2110 return dev; /* already known */
2111 }
2112
2113 dev = p2p_create_device(p2p, addr);
2114 if (dev == NULL)
2115 return NULL;
2116
2117 p2p_add_dev_info(p2p, addr, dev, msg);
2118
2119 return dev;
2120 }
2121
2122
dev_type_match(const u8 * dev_type,const u8 * req_dev_type)2123 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
2124 {
2125 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
2126 return 1;
2127 if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
2128 WPA_GET_BE32(&req_dev_type[2]) == 0 &&
2129 WPA_GET_BE16(&req_dev_type[6]) == 0)
2130 return 1; /* Category match with wildcard OUI/sub-category */
2131 return 0;
2132 }
2133
2134
dev_type_list_match(const u8 * dev_type,const u8 * req_dev_type[],size_t num_req_dev_type)2135 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
2136 size_t num_req_dev_type)
2137 {
2138 size_t i;
2139 for (i = 0; i < num_req_dev_type; i++) {
2140 if (dev_type_match(dev_type, req_dev_type[i]))
2141 return 1;
2142 }
2143 return 0;
2144 }
2145
2146
2147 /**
2148 * p2p_match_dev_type - Match local device type with requested type
2149 * @p2p: P2P module context from p2p_init()
2150 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
2151 * Returns: 1 on match, 0 on mismatch
2152 *
2153 * This function can be used to match the Requested Device Type attribute in
2154 * WPS IE with the local device types for deciding whether to reply to a Probe
2155 * Request frame.
2156 */
p2p_match_dev_type(struct p2p_data * p2p,struct wpabuf * wps)2157 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2158 {
2159 struct wps_parse_attr attr;
2160 size_t i;
2161
2162 if (wps_parse_msg(wps, &attr))
2163 return 1; /* assume no Requested Device Type attributes */
2164
2165 if (attr.num_req_dev_type == 0)
2166 return 1; /* no Requested Device Type attributes -> match */
2167
2168 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2169 attr.num_req_dev_type))
2170 return 1; /* Own Primary Device Type matches */
2171
2172 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2173 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2174 attr.req_dev_type,
2175 attr.num_req_dev_type))
2176 return 1; /* Own Secondary Device Type matches */
2177 }
2178
2179 /* No matching device type found */
2180 return 0;
2181 }
2182
2183
p2p_build_probe_resp_ies(struct p2p_data * p2p,const u8 * query_hash,u8 query_count)2184 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p,
2185 const u8 *query_hash,
2186 u8 query_count)
2187 {
2188 struct wpabuf *buf;
2189 u8 *len;
2190 int pw_id = -1;
2191 size_t extra = 0;
2192
2193 #ifdef CONFIG_WIFI_DISPLAY
2194 if (p2p->wfd_ie_probe_resp)
2195 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2196 #endif /* CONFIG_WIFI_DISPLAY */
2197
2198 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2199 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2200
2201 if (query_count)
2202 extra += MAX_SVC_ADV_IE_LEN;
2203
2204 buf = wpabuf_alloc(1000 + extra);
2205 if (buf == NULL)
2206 return NULL;
2207
2208 if (p2p->go_neg_peer) {
2209 /* Advertise immediate availability of WPS credential */
2210 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2211 }
2212
2213 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2214 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2215 wpabuf_free(buf);
2216 return NULL;
2217 }
2218
2219 #ifdef CONFIG_WIFI_DISPLAY
2220 if (p2p->wfd_ie_probe_resp)
2221 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2222 #endif /* CONFIG_WIFI_DISPLAY */
2223
2224 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2225 wpabuf_put_buf(buf,
2226 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2227
2228 /* P2P IE */
2229 len = p2p_buf_add_ie_hdr(buf);
2230 p2p_buf_add_capability(buf, p2p->dev_capab &
2231 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2232 if (p2p->ext_listen_interval)
2233 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2234 p2p->ext_listen_interval);
2235 p2p_buf_add_device_info(buf, p2p, NULL);
2236 p2p_buf_update_ie_hdr(buf, len);
2237
2238 if (query_count) {
2239 p2p_buf_add_service_instance(buf, p2p, query_count, query_hash,
2240 p2p->p2ps_adv_list);
2241 }
2242
2243 return buf;
2244 }
2245
p2p_build_probe_resp_buf(struct p2p_data * p2p,struct wpabuf * buf,struct wpabuf * ies,const u8 * addr,int rx_freq)2246 static int p2p_build_probe_resp_buf(struct p2p_data *p2p, struct wpabuf *buf,
2247 struct wpabuf *ies,
2248 const u8 *addr, int rx_freq)
2249 {
2250 struct ieee80211_mgmt *resp;
2251 u8 channel, op_class;
2252
2253 resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt,
2254 u.probe_resp.variable));
2255
2256 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2257 (WLAN_FC_STYPE_PROBE_RESP << 4));
2258 os_memcpy(resp->da, addr, ETH_ALEN);
2259 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2260 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2261 resp->u.probe_resp.beacon_int = host_to_le16(100);
2262 /* hardware or low-level driver will setup seq_ctrl and timestamp */
2263 resp->u.probe_resp.capab_info =
2264 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2265 WLAN_CAPABILITY_PRIVACY |
2266 WLAN_CAPABILITY_SHORT_SLOT_TIME);
2267
2268 wpabuf_put_u8(buf, WLAN_EID_SSID);
2269 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2270 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2271
2272 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2273 wpabuf_put_u8(buf, 8);
2274 wpabuf_put_u8(buf, (60 / 5) | 0x80);
2275 wpabuf_put_u8(buf, 90 / 5);
2276 wpabuf_put_u8(buf, (120 / 5) | 0x80);
2277 wpabuf_put_u8(buf, 180 / 5);
2278 wpabuf_put_u8(buf, (240 / 5) | 0x80);
2279 wpabuf_put_u8(buf, 360 / 5);
2280 wpabuf_put_u8(buf, 480 / 5);
2281 wpabuf_put_u8(buf, 540 / 5);
2282
2283 if (!rx_freq) {
2284 channel = p2p->cfg->channel;
2285 } else if (p2p_freq_to_channel(rx_freq, &op_class, &channel)) {
2286 p2p_err(p2p, "Failed to convert freq to channel");
2287 return -1;
2288 }
2289
2290 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2291 wpabuf_put_u8(buf, 1);
2292 wpabuf_put_u8(buf, channel);
2293
2294 wpabuf_put_buf(buf, ies);
2295
2296 return 0;
2297 }
2298
p2p_service_find_asp(struct p2p_data * p2p,const u8 * hash)2299 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash)
2300 {
2301 struct p2ps_advertisement *adv_data;
2302 int any_wfa;
2303
2304 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list);
2305
2306 /* Wildcard org.wi-fi.wfds matches any WFA spec defined service */
2307 any_wfa = os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0;
2308
2309 adv_data = p2p->p2ps_adv_list;
2310 while (adv_data) {
2311 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0)
2312 return 1; /* exact hash match */
2313 if (any_wfa &&
2314 os_strncmp(adv_data->svc_name, P2PS_WILD_HASH_STR,
2315 os_strlen(P2PS_WILD_HASH_STR)) == 0)
2316 return 1; /* WFA service match */
2317 adv_data = adv_data->next;
2318 }
2319
2320 return 0;
2321 }
2322
2323
2324 static enum p2p_probe_req_status
p2p_reply_probe(struct p2p_data * p2p,const u8 * addr,const u8 * dst,const u8 * bssid,const u8 * ie,size_t ie_len,unsigned int rx_freq)2325 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2326 const u8 *bssid, const u8 *ie, size_t ie_len,
2327 unsigned int rx_freq)
2328 {
2329 struct ieee802_11_elems elems;
2330 struct wpabuf *buf;
2331 struct p2p_message msg;
2332 struct wpabuf *ies;
2333
2334 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2335 ParseFailed) {
2336 /* Ignore invalid Probe Request frames */
2337 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2338 return P2P_PREQ_MALFORMED;
2339 }
2340
2341 if (elems.p2p == NULL) {
2342 /* not a P2P probe - ignore it */
2343 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2344 return P2P_PREQ_NOT_P2P;
2345 }
2346
2347 if (dst && !is_broadcast_ether_addr(dst) &&
2348 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2349 /* Not sent to the broadcast address or our P2P Device Address
2350 */
2351 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2352 MAC2STR(dst));
2353 return P2P_PREQ_NOT_PROCESSED;
2354 }
2355
2356 if (bssid && !is_broadcast_ether_addr(bssid)) {
2357 /* Not sent to the Wildcard BSSID */
2358 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2359 MAC2STR(bssid));
2360 return P2P_PREQ_NOT_PROCESSED;
2361 }
2362
2363 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2364 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2365 0) {
2366 /* not using P2P Wildcard SSID - ignore */
2367 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2368 return P2P_PREQ_NOT_PROCESSED;
2369 }
2370
2371 if (supp_rates_11b_only(&elems)) {
2372 /* Indicates support for 11b rates only */
2373 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2374 return P2P_PREQ_NOT_P2P;
2375 }
2376
2377 os_memset(&msg, 0, sizeof(msg));
2378 if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2379 /* Could not parse P2P attributes */
2380 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2381 return P2P_PREQ_NOT_P2P;
2382 }
2383
2384 if (msg.service_hash && msg.service_hash_count) {
2385 const u8 *hash = msg.service_hash;
2386 u8 i;
2387 int p2ps_svc_found = 0;
2388
2389 p2p_dbg(p2p, "in_listen=%d drv_in_listen=%d when received P2PS Probe Request at %u MHz; own Listen channel %u, pending listen freq %u MHz",
2390 p2p->in_listen, p2p->drv_in_listen, rx_freq,
2391 p2p->cfg->channel, p2p->pending_listen_freq);
2392
2393 if (!p2p->in_listen && !p2p->drv_in_listen &&
2394 p2p->pending_listen_freq && rx_freq &&
2395 rx_freq != p2p->pending_listen_freq) {
2396 p2p_dbg(p2p, "Do not reply to Probe Request frame that was received on %u MHz while waiting to start Listen state on %u MHz",
2397 rx_freq, p2p->pending_listen_freq);
2398 p2p_parse_free(&msg);
2399 return P2P_PREQ_NOT_LISTEN;
2400 }
2401
2402 for (i = 0; i < msg.service_hash_count; i++) {
2403 if (p2p_service_find_asp(p2p, hash)) {
2404 p2p_dbg(p2p, "Service Hash match found: "
2405 MACSTR, MAC2STR(hash));
2406 p2ps_svc_found = 1;
2407 break;
2408 }
2409 hash += P2PS_HASH_LEN;
2410 }
2411
2412 /* Probed hash unknown */
2413 if (!p2ps_svc_found) {
2414 p2p_dbg(p2p, "No Service Hash match found");
2415 p2p_parse_free(&msg);
2416 return P2P_PREQ_NOT_PROCESSED;
2417 }
2418 } else {
2419 /* This is not a P2PS Probe Request */
2420 p2p_dbg(p2p, "No P2PS Hash in Probe Request");
2421
2422 if (!p2p->in_listen || !p2p->drv_in_listen) {
2423 /* not in Listen state - ignore Probe Request */
2424 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2425 p2p->in_listen, p2p->drv_in_listen);
2426 p2p_parse_free(&msg);
2427 return P2P_PREQ_NOT_LISTEN;
2428 }
2429 }
2430
2431 if (msg.device_id &&
2432 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2433 /* Device ID did not match */
2434 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2435 MAC2STR(msg.device_id));
2436 p2p_parse_free(&msg);
2437 return P2P_PREQ_NOT_PROCESSED;
2438 }
2439
2440 /* Check Requested Device Type match */
2441 if (msg.wps_attributes &&
2442 !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2443 /* No match with Requested Device Type */
2444 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2445 p2p_parse_free(&msg);
2446 return P2P_PREQ_NOT_PROCESSED;
2447 }
2448
2449 if (!p2p->cfg->send_probe_resp) {
2450 /* Response generated elsewhere */
2451 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2452 p2p_parse_free(&msg);
2453 return P2P_PREQ_NOT_PROCESSED;
2454 }
2455
2456 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2457
2458 /*
2459 * We do not really have a specific BSS that this frame is advertising,
2460 * so build a frame that has some information in valid format. This is
2461 * really only used for discovery purposes, not to learn exact BSS
2462 * parameters.
2463 */
2464 ies = p2p_build_probe_resp_ies(p2p, msg.service_hash,
2465 msg.service_hash_count);
2466 p2p_parse_free(&msg);
2467 if (ies == NULL)
2468 return P2P_PREQ_NOT_PROCESSED;
2469
2470 buf = wpabuf_alloc(200 + wpabuf_len(ies));
2471 if (buf == NULL) {
2472 wpabuf_free(ies);
2473 return P2P_PREQ_NOT_PROCESSED;
2474 }
2475
2476 if (p2p_build_probe_resp_buf(p2p, buf, ies, addr, rx_freq)) {
2477 wpabuf_free(ies);
2478 wpabuf_free(buf);
2479 return P2P_PREQ_NOT_PROCESSED;
2480 }
2481
2482 wpabuf_free(ies);
2483
2484 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf, rx_freq);
2485
2486 wpabuf_free(buf);
2487
2488 return P2P_PREQ_PROCESSED;
2489 }
2490
2491
2492 enum p2p_probe_req_status
p2p_probe_req_rx(struct p2p_data * p2p,const u8 * addr,const u8 * dst,const u8 * bssid,const u8 * ie,size_t ie_len,unsigned int rx_freq,int p2p_lo_started)2493 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2494 const u8 *bssid, const u8 *ie, size_t ie_len,
2495 unsigned int rx_freq, int p2p_lo_started)
2496 {
2497 enum p2p_probe_req_status res;
2498
2499 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2500
2501 if (p2p_lo_started) {
2502 p2p_dbg(p2p,
2503 "Probe Response is offloaded, do not reply Probe Request");
2504 return P2P_PREQ_PROCESSED;
2505 }
2506
2507 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq);
2508 if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED)
2509 return res;
2510
2511 /*
2512 * Activate a pending GO Negotiation/Invite flow if a received Probe
2513 * Request frame is from an expected peer. Some devices may share the
2514 * same address for P2P and non-P2P STA running simultaneously. The
2515 * P2P_PREQ_PROCESSED and P2P_PREQ_NOT_PROCESSED p2p_reply_probe()
2516 * return values verified above ensure we are handling a Probe Request
2517 * frame from a P2P peer.
2518 */
2519 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2520 p2p->go_neg_peer &&
2521 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2522 == 0 &&
2523 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2524 /* Received a Probe Request from GO Negotiation peer */
2525 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2526 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2527 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2528 return res;
2529 }
2530
2531 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2532 p2p->invite_peer &&
2533 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2534 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2535 == 0) {
2536 /* Received a Probe Request from Invite peer */
2537 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2538 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2539 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2540 return res;
2541 }
2542
2543 return res;
2544 }
2545
2546
p2p_assoc_req_ie_wlan_ap(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,struct wpabuf * p2p_ie)2547 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2548 u8 *buf, size_t len, struct wpabuf *p2p_ie)
2549 {
2550 struct wpabuf *tmp;
2551 u8 *lpos;
2552 size_t tmplen;
2553 int res;
2554 u8 group_capab;
2555 struct p2p_message msg;
2556
2557 if (p2p_ie == NULL)
2558 return 0; /* WLAN AP is not a P2P manager */
2559
2560 os_memset(&msg, 0, sizeof(msg));
2561 if (p2p_parse_p2p_ie(p2p_ie, &msg) < 0)
2562 return 0;
2563
2564 p2p_dbg(p2p, "BSS P2P manageability %s",
2565 msg.manageability ? "enabled" : "disabled");
2566
2567 if (!msg.manageability)
2568 return 0;
2569
2570 /*
2571 * (Re)Association Request - P2P IE
2572 * P2P Capability attribute (shall be present)
2573 * P2P Interface attribute (present if concurrent device and
2574 * P2P Management is enabled)
2575 */
2576 tmp = wpabuf_alloc(200);
2577 if (tmp == NULL)
2578 return -1;
2579
2580 lpos = p2p_buf_add_ie_hdr(tmp);
2581 group_capab = 0;
2582 if (p2p->num_groups > 0) {
2583 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2584 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2585 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2586 p2p->cross_connect)
2587 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2588 }
2589 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2590 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2591 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2592 p2p_buf_add_p2p_interface(tmp, p2p);
2593 p2p_buf_update_ie_hdr(tmp, lpos);
2594
2595 tmplen = wpabuf_len(tmp);
2596 if (tmplen > len)
2597 res = -1;
2598 else {
2599 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2600 res = tmplen;
2601 }
2602 wpabuf_free(tmp);
2603
2604 return res;
2605 }
2606
2607
p2p_assoc_req_ie(struct p2p_data * p2p,const u8 * bssid,u8 * buf,size_t len,int p2p_group,struct wpabuf * p2p_ie)2608 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2609 size_t len, int p2p_group, struct wpabuf *p2p_ie)
2610 {
2611 struct wpabuf *tmp;
2612 u8 *lpos;
2613 struct p2p_device *peer;
2614 size_t tmplen;
2615 int res;
2616 size_t extra = 0;
2617
2618 if (!p2p_group)
2619 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2620
2621 #ifdef CONFIG_WIFI_DISPLAY
2622 if (p2p->wfd_ie_assoc_req)
2623 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2624 #endif /* CONFIG_WIFI_DISPLAY */
2625
2626 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2627 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2628
2629 /*
2630 * (Re)Association Request - P2P IE
2631 * P2P Capability attribute (shall be present)
2632 * Extended Listen Timing (may be present)
2633 * P2P Device Info attribute (shall be present)
2634 */
2635 tmp = wpabuf_alloc(200 + extra);
2636 if (tmp == NULL)
2637 return -1;
2638
2639 #ifdef CONFIG_WIFI_DISPLAY
2640 if (p2p->wfd_ie_assoc_req)
2641 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2642 #endif /* CONFIG_WIFI_DISPLAY */
2643
2644 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2645 wpabuf_put_buf(tmp,
2646 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2647
2648 peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2649
2650 lpos = p2p_buf_add_ie_hdr(tmp);
2651 p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2652 if (p2p->ext_listen_interval)
2653 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2654 p2p->ext_listen_interval);
2655 p2p_buf_add_device_info(tmp, p2p, peer);
2656 p2p_buf_update_ie_hdr(tmp, lpos);
2657
2658 tmplen = wpabuf_len(tmp);
2659 if (tmplen > len)
2660 res = -1;
2661 else {
2662 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2663 res = tmplen;
2664 }
2665 wpabuf_free(tmp);
2666
2667 return res;
2668 }
2669
2670
p2p_scan_result_text(const u8 * ies,size_t ies_len,char * buf,char * end)2671 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2672 {
2673 struct wpabuf *p2p_ie;
2674 int ret;
2675
2676 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2677 if (p2p_ie == NULL)
2678 return 0;
2679
2680 ret = p2p_attr_text(p2p_ie, buf, end);
2681 wpabuf_free(p2p_ie);
2682 return ret;
2683 }
2684
2685
2686 struct p2ps_advertisement *
p2p_service_p2ps_id(struct p2p_data * p2p,u32 adv_id)2687 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id)
2688 {
2689 struct p2ps_advertisement *adv_data;
2690
2691 if (!p2p)
2692 return NULL;
2693
2694 adv_data = p2p->p2ps_adv_list;
2695 while (adv_data) {
2696 if (adv_data->id == adv_id)
2697 return adv_data;
2698 adv_data = adv_data->next;
2699 }
2700
2701 return NULL;
2702 }
2703
2704
p2p_service_del_asp(struct p2p_data * p2p,u32 adv_id)2705 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id)
2706 {
2707 struct p2ps_advertisement *adv_data;
2708 struct p2ps_advertisement **prior;
2709
2710 if (!p2p)
2711 return -1;
2712
2713 adv_data = p2p->p2ps_adv_list;
2714 prior = &p2p->p2ps_adv_list;
2715 while (adv_data) {
2716 if (adv_data->id == adv_id) {
2717 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id);
2718 *prior = adv_data->next;
2719 os_free(adv_data);
2720 return 0;
2721 }
2722 prior = &adv_data->next;
2723 adv_data = adv_data->next;
2724 }
2725
2726 return -1;
2727 }
2728
2729
p2p_service_add_asp(struct p2p_data * p2p,int auto_accept,u32 adv_id,const char * adv_str,u8 svc_state,u16 config_methods,const char * svc_info,const u8 * cpt_priority)2730 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id,
2731 const char *adv_str, u8 svc_state, u16 config_methods,
2732 const char *svc_info, const u8 *cpt_priority)
2733 {
2734 struct p2ps_advertisement *adv_data, *tmp, **prev;
2735 u8 buf[P2PS_HASH_LEN];
2736 size_t adv_data_len, adv_len, info_len = 0;
2737 int i;
2738
2739 if (!p2p || !adv_str || !adv_str[0] || !cpt_priority)
2740 return -1;
2741
2742 if (!(config_methods & p2p->cfg->config_methods)) {
2743 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x",
2744 config_methods, p2p->cfg->config_methods);
2745 return -1;
2746 }
2747
2748 if (!p2ps_gen_hash(p2p, adv_str, buf))
2749 return -1;
2750
2751 if (svc_info)
2752 info_len = os_strlen(svc_info);
2753 adv_len = os_strlen(adv_str);
2754 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 +
2755 info_len + 1;
2756
2757 adv_data = os_zalloc(adv_data_len);
2758 if (!adv_data)
2759 return -1;
2760
2761 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN);
2762 adv_data->id = adv_id;
2763 adv_data->state = svc_state;
2764 adv_data->config_methods = config_methods & p2p->cfg->config_methods;
2765 adv_data->auto_accept = (u8) auto_accept;
2766 os_memcpy(adv_data->svc_name, adv_str, adv_len);
2767
2768 for (i = 0; cpt_priority[i] && i < P2PS_FEATURE_CAPAB_CPT_MAX; i++) {
2769 adv_data->cpt_priority[i] = cpt_priority[i];
2770 adv_data->cpt_mask |= cpt_priority[i];
2771 }
2772
2773 if (svc_info && info_len) {
2774 adv_data->svc_info = &adv_data->svc_name[adv_len + 1];
2775 os_memcpy(adv_data->svc_info, svc_info, info_len);
2776 }
2777
2778 /*
2779 * Group Advertisements by service string. They do not need to be
2780 * sorted, but groups allow easier Probe Response instance grouping
2781 */
2782 tmp = p2p->p2ps_adv_list;
2783 prev = &p2p->p2ps_adv_list;
2784 while (tmp) {
2785 if (tmp->id == adv_data->id) {
2786 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) {
2787 os_free(adv_data);
2788 return -1;
2789 }
2790 adv_data->next = tmp->next;
2791 *prev = adv_data;
2792 os_free(tmp);
2793 goto inserted;
2794 } else {
2795 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) {
2796 adv_data->next = tmp->next;
2797 tmp->next = adv_data;
2798 goto inserted;
2799 }
2800 }
2801 prev = &tmp->next;
2802 tmp = tmp->next;
2803 }
2804
2805 /* No svc_name match found */
2806 adv_data->next = p2p->p2ps_adv_list;
2807 p2p->p2ps_adv_list = adv_data;
2808
2809 inserted:
2810 p2p_dbg(p2p,
2811 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s' cpt_mask=0x%x",
2812 adv_id, adv_data->config_methods, svc_state, adv_str,
2813 adv_data->cpt_mask);
2814
2815 return 0;
2816 }
2817
2818
p2p_service_flush_asp(struct p2p_data * p2p)2819 void p2p_service_flush_asp(struct p2p_data *p2p)
2820 {
2821 struct p2ps_advertisement *adv, *prev;
2822
2823 if (!p2p)
2824 return;
2825
2826 adv = p2p->p2ps_adv_list;
2827 while (adv) {
2828 prev = adv;
2829 adv = adv->next;
2830 os_free(prev);
2831 }
2832
2833 p2p->p2ps_adv_list = NULL;
2834 p2ps_prov_free(p2p);
2835 p2p_dbg(p2p, "All ASP advertisements flushed");
2836 }
2837
2838
p2p_parse_dev_addr_in_p2p_ie(struct wpabuf * p2p_ie,u8 * dev_addr)2839 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2840 {
2841 struct p2p_message msg;
2842
2843 os_memset(&msg, 0, sizeof(msg));
2844 if (p2p_parse_p2p_ie(p2p_ie, &msg))
2845 return -1;
2846
2847 if (msg.p2p_device_addr) {
2848 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2849 return 0;
2850 } else if (msg.device_id) {
2851 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2852 return 0;
2853 }
2854 return -1;
2855 }
2856
2857
p2p_parse_dev_addr(const u8 * ies,size_t ies_len,u8 * dev_addr)2858 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2859 {
2860 struct wpabuf *p2p_ie;
2861 int ret;
2862
2863 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2864 P2P_IE_VENDOR_TYPE);
2865 if (p2p_ie == NULL)
2866 return -1;
2867 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2868 wpabuf_free(p2p_ie);
2869 return ret;
2870 }
2871
2872
p2p_clear_go_neg(struct p2p_data * p2p)2873 static void p2p_clear_go_neg(struct p2p_data *p2p)
2874 {
2875 p2p->go_neg_peer = NULL;
2876 p2p_clear_timeout(p2p);
2877 p2p_set_state(p2p, P2P_IDLE);
2878 }
2879
2880
p2p_wps_success_cb(struct p2p_data * p2p,const u8 * mac_addr)2881 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2882 {
2883 if (p2p->go_neg_peer == NULL) {
2884 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2885 return; /* No pending Group Formation */
2886 }
2887
2888 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2889 0) {
2890 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2891 MACSTR " (GO Negotiation peer " MACSTR ")",
2892 MAC2STR(mac_addr),
2893 MAC2STR(p2p->go_neg_peer->intended_addr));
2894 return; /* Ignore unexpected peer address */
2895 }
2896
2897 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2898 MAC2STR(mac_addr));
2899
2900 p2p_clear_go_neg(p2p);
2901 }
2902
2903
p2p_group_formation_failed(struct p2p_data * p2p)2904 void p2p_group_formation_failed(struct p2p_data *p2p)
2905 {
2906 if (p2p->go_neg_peer == NULL) {
2907 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2908 return; /* No pending Group Formation */
2909 }
2910
2911 p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2912 MAC2STR(p2p->go_neg_peer->intended_addr));
2913
2914 p2p_clear_go_neg(p2p);
2915 }
2916
2917
p2p_init(const struct p2p_config * cfg)2918 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2919 {
2920 struct p2p_data *p2p;
2921
2922 if (cfg->max_peers < 1 ||
2923 cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2924 return NULL;
2925
2926 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2927 if (p2p == NULL)
2928 return NULL;
2929 p2p->cfg = (struct p2p_config *) (p2p + 1);
2930 os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2931 if (cfg->dev_name)
2932 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2933 if (cfg->manufacturer)
2934 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2935 if (cfg->model_name)
2936 p2p->cfg->model_name = os_strdup(cfg->model_name);
2937 if (cfg->model_number)
2938 p2p->cfg->model_number = os_strdup(cfg->model_number);
2939 if (cfg->serial_number)
2940 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2941 if (cfg->pref_chan) {
2942 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2943 sizeof(struct p2p_channel));
2944 if (p2p->cfg->pref_chan) {
2945 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2946 cfg->num_pref_chan *
2947 sizeof(struct p2p_channel));
2948 } else
2949 p2p->cfg->num_pref_chan = 0;
2950 }
2951
2952 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);
2953
2954 p2p->min_disc_int = 1;
2955 p2p->max_disc_int = 3;
2956 p2p->max_disc_tu = -1;
2957
2958 if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2959 p2p->next_tie_breaker = 0;
2960 p2p->next_tie_breaker &= 0x01;
2961 if (cfg->sd_request)
2962 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2963 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2964 if (cfg->concurrent_operations)
2965 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2966 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2967
2968 dl_list_init(&p2p->devices);
2969
2970 p2p->go_timeout = 100;
2971 p2p->client_timeout = 20;
2972 p2p->num_p2p_sd_queries = 0;
2973
2974 p2p_dbg(p2p, "initialized");
2975 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2976 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2977
2978 return p2p;
2979 }
2980
2981
p2p_deinit(struct p2p_data * p2p)2982 void p2p_deinit(struct p2p_data *p2p)
2983 {
2984 #ifdef CONFIG_WIFI_DISPLAY
2985 wpabuf_free(p2p->wfd_ie_beacon);
2986 wpabuf_free(p2p->wfd_ie_probe_req);
2987 wpabuf_free(p2p->wfd_ie_probe_resp);
2988 wpabuf_free(p2p->wfd_ie_assoc_req);
2989 wpabuf_free(p2p->wfd_ie_invitation);
2990 wpabuf_free(p2p->wfd_ie_prov_disc_req);
2991 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2992 wpabuf_free(p2p->wfd_ie_go_neg);
2993 wpabuf_free(p2p->wfd_dev_info);
2994 wpabuf_free(p2p->wfd_assoc_bssid);
2995 wpabuf_free(p2p->wfd_coupled_sink_info);
2996 #endif /* CONFIG_WIFI_DISPLAY */
2997
2998 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2999 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
3000 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
3001 p2p_flush(p2p);
3002 p2p_free_req_dev_types(p2p);
3003 os_free(p2p->cfg->dev_name);
3004 os_free(p2p->cfg->manufacturer);
3005 os_free(p2p->cfg->model_name);
3006 os_free(p2p->cfg->model_number);
3007 os_free(p2p->cfg->serial_number);
3008 os_free(p2p->cfg->pref_chan);
3009 os_free(p2p->groups);
3010 p2ps_prov_free(p2p);
3011 wpabuf_free(p2p->sd_resp);
3012 p2p_remove_wps_vendor_extensions(p2p);
3013 os_free(p2p->no_go_freq.range);
3014 p2p_service_flush_asp(p2p);
3015
3016 os_free(p2p);
3017 }
3018
3019
p2p_flush(struct p2p_data * p2p)3020 void p2p_flush(struct p2p_data *p2p)
3021 {
3022 struct p2p_device *dev, *prev;
3023
3024 p2p_ext_listen(p2p, 0, 0);
3025 p2p_stop_find(p2p);
3026 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
3027 list) {
3028 dl_list_del(&dev->list);
3029 p2p_device_free(p2p, dev);
3030 }
3031 p2p_free_sd_queries(p2p);
3032 os_free(p2p->after_scan_tx);
3033 p2p->after_scan_tx = NULL;
3034 p2p->ssid_set = 0;
3035 p2ps_prov_free(p2p);
3036 p2p_reset_pending_pd(p2p);
3037 p2p->override_pref_op_class = 0;
3038 p2p->override_pref_channel = 0;
3039 }
3040
3041
p2p_unauthorize(struct p2p_data * p2p,const u8 * addr)3042 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
3043 {
3044 struct p2p_device *dev;
3045
3046 dev = p2p_get_device(p2p, addr);
3047 if (dev == NULL)
3048 return -1;
3049
3050 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
3051
3052 if (p2p->go_neg_peer == dev) {
3053 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
3054 p2p->go_neg_peer = NULL;
3055 }
3056
3057 dev->wps_method = WPS_NOT_READY;
3058 dev->oob_pw_id = 0;
3059 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
3060 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
3061
3062 /* Check if after_scan_tx is for this peer. If so free it */
3063 if (p2p->after_scan_tx &&
3064 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
3065 os_free(p2p->after_scan_tx);
3066 p2p->after_scan_tx = NULL;
3067 }
3068
3069 return 0;
3070 }
3071
3072
p2p_set_dev_name(struct p2p_data * p2p,const char * dev_name)3073 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
3074 {
3075 os_free(p2p->cfg->dev_name);
3076 if (dev_name) {
3077 p2p->cfg->dev_name = os_strdup(dev_name);
3078 if (p2p->cfg->dev_name == NULL)
3079 return -1;
3080 } else
3081 p2p->cfg->dev_name = NULL;
3082 return 0;
3083 }
3084
3085
p2p_set_manufacturer(struct p2p_data * p2p,const char * manufacturer)3086 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
3087 {
3088 os_free(p2p->cfg->manufacturer);
3089 p2p->cfg->manufacturer = NULL;
3090 if (manufacturer) {
3091 p2p->cfg->manufacturer = os_strdup(manufacturer);
3092 if (p2p->cfg->manufacturer == NULL)
3093 return -1;
3094 }
3095
3096 return 0;
3097 }
3098
3099
p2p_set_model_name(struct p2p_data * p2p,const char * model_name)3100 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
3101 {
3102 os_free(p2p->cfg->model_name);
3103 p2p->cfg->model_name = NULL;
3104 if (model_name) {
3105 p2p->cfg->model_name = os_strdup(model_name);
3106 if (p2p->cfg->model_name == NULL)
3107 return -1;
3108 }
3109
3110 return 0;
3111 }
3112
3113
p2p_set_model_number(struct p2p_data * p2p,const char * model_number)3114 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
3115 {
3116 os_free(p2p->cfg->model_number);
3117 p2p->cfg->model_number = NULL;
3118 if (model_number) {
3119 p2p->cfg->model_number = os_strdup(model_number);
3120 if (p2p->cfg->model_number == NULL)
3121 return -1;
3122 }
3123
3124 return 0;
3125 }
3126
3127
p2p_set_serial_number(struct p2p_data * p2p,const char * serial_number)3128 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
3129 {
3130 os_free(p2p->cfg->serial_number);
3131 p2p->cfg->serial_number = NULL;
3132 if (serial_number) {
3133 p2p->cfg->serial_number = os_strdup(serial_number);
3134 if (p2p->cfg->serial_number == NULL)
3135 return -1;
3136 }
3137
3138 return 0;
3139 }
3140
3141
p2p_set_config_methods(struct p2p_data * p2p,u16 config_methods)3142 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
3143 {
3144 p2p->cfg->config_methods = config_methods;
3145 }
3146
3147
p2p_set_uuid(struct p2p_data * p2p,const u8 * uuid)3148 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
3149 {
3150 os_memcpy(p2p->cfg->uuid, uuid, 16);
3151 }
3152
3153
p2p_set_pri_dev_type(struct p2p_data * p2p,const u8 * pri_dev_type)3154 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
3155 {
3156 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
3157 return 0;
3158 }
3159
3160
p2p_set_sec_dev_types(struct p2p_data * p2p,const u8 dev_types[][8],size_t num_dev_types)3161 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
3162 size_t num_dev_types)
3163 {
3164 if (num_dev_types > P2P_SEC_DEVICE_TYPES)
3165 num_dev_types = P2P_SEC_DEVICE_TYPES;
3166 p2p->cfg->num_sec_dev_types = num_dev_types;
3167 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
3168 return 0;
3169 }
3170
3171
p2p_remove_wps_vendor_extensions(struct p2p_data * p2p)3172 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
3173 {
3174 int i;
3175
3176 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3177 wpabuf_free(p2p->wps_vendor_ext[i]);
3178 p2p->wps_vendor_ext[i] = NULL;
3179 }
3180 }
3181
3182
p2p_add_wps_vendor_extension(struct p2p_data * p2p,const struct wpabuf * vendor_ext)3183 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
3184 const struct wpabuf *vendor_ext)
3185 {
3186 int i;
3187
3188 if (vendor_ext == NULL)
3189 return -1;
3190
3191 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3192 if (p2p->wps_vendor_ext[i] == NULL)
3193 break;
3194 }
3195 if (i >= P2P_MAX_WPS_VENDOR_EXT)
3196 return -1;
3197
3198 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
3199 if (p2p->wps_vendor_ext[i] == NULL)
3200 return -1;
3201
3202 return 0;
3203 }
3204
3205
p2p_set_country(struct p2p_data * p2p,const char * country)3206 int p2p_set_country(struct p2p_data *p2p, const char *country)
3207 {
3208 os_memcpy(p2p->cfg->country, country, 3);
3209 return 0;
3210 }
3211
3212
p2p_pre_find_operation(struct p2p_data * p2p,struct p2p_device * dev)3213 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
3214 {
3215 int res;
3216
3217 if (dev->sd_pending_bcast_queries == 0) {
3218 /* Initialize with total number of registered broadcast
3219 * SD queries. */
3220 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
3221 }
3222
3223 res = p2p_start_sd(p2p, dev);
3224 if (res == -2)
3225 return -2;
3226 if (res == 0)
3227 return 1;
3228
3229 if (dev->req_config_methods &&
3230 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
3231 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3232 MACSTR " (config methods 0x%x)",
3233 MAC2STR(dev->info.p2p_device_addr),
3234 dev->req_config_methods);
3235 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
3236 return 1;
3237 }
3238
3239 return 0;
3240 }
3241
3242
p2p_continue_find(struct p2p_data * p2p)3243 void p2p_continue_find(struct p2p_data *p2p)
3244 {
3245 struct p2p_device *dev;
3246 int found, res;
3247
3248 p2p_set_state(p2p, P2P_SEARCH);
3249
3250 /* Continue from the device following the last iteration */
3251 found = 0;
3252 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3253 if (dev == p2p->last_p2p_find_oper) {
3254 found = 1;
3255 continue;
3256 }
3257 if (!found)
3258 continue;
3259 res = p2p_pre_find_operation(p2p, dev);
3260 if (res > 0) {
3261 p2p->last_p2p_find_oper = dev;
3262 return;
3263 }
3264 if (res == -2)
3265 goto skip_sd;
3266 }
3267
3268 /*
3269 * Wrap around to the beginning of the list and continue until the last
3270 * iteration device.
3271 */
3272 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3273 res = p2p_pre_find_operation(p2p, dev);
3274 if (res > 0) {
3275 p2p->last_p2p_find_oper = dev;
3276 return;
3277 }
3278 if (res == -2)
3279 goto skip_sd;
3280 if (dev == p2p->last_p2p_find_oper)
3281 break;
3282 }
3283
3284 skip_sd:
3285 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN);
3286 p2p_listen_in_find(p2p, 1);
3287 }
3288
3289
p2p_sd_cb(struct p2p_data * p2p,int success)3290 static void p2p_sd_cb(struct p2p_data *p2p, int success)
3291 {
3292 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
3293 success);
3294 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3295
3296 if (!success) {
3297 if (p2p->sd_peer) {
3298 if (is_zero_ether_addr(p2p->sd_query_no_ack)) {
3299 os_memcpy(p2p->sd_query_no_ack,
3300 p2p->sd_peer->info.p2p_device_addr,
3301 ETH_ALEN);
3302 p2p_dbg(p2p,
3303 "First SD Query no-ACK in this search iteration: "
3304 MACSTR, MAC2STR(p2p->sd_query_no_ack));
3305 }
3306 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3307 }
3308 p2p->sd_peer = NULL;
3309 if (p2p->state != P2P_IDLE)
3310 p2p_continue_find(p2p);
3311 return;
3312 }
3313
3314 if (p2p->sd_peer == NULL) {
3315 p2p_dbg(p2p, "No SD peer entry known");
3316 if (p2p->state != P2P_IDLE)
3317 p2p_continue_find(p2p);
3318 return;
3319 }
3320
3321 if (p2p->sd_query && p2p->sd_query->for_all_peers) {
3322 /* Update the pending broadcast SD query count for this device
3323 */
3324 p2p->sd_peer->sd_pending_bcast_queries--;
3325
3326 /*
3327 * If there are no pending broadcast queries for this device,
3328 * mark it as done (-1).
3329 */
3330 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
3331 p2p->sd_peer->sd_pending_bcast_queries = -1;
3332 }
3333
3334 /* Wait for response from the peer */
3335 p2p_set_state(p2p, P2P_SD_DURING_FIND);
3336 p2p_set_timeout(p2p, 0, 200000);
3337 }
3338
3339
3340 /**
3341 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
3342 * @p2p: P2P module context from p2p_init()
3343 */
p2p_retry_pd(struct p2p_data * p2p)3344 static void p2p_retry_pd(struct p2p_data *p2p)
3345 {
3346 struct p2p_device *dev;
3347
3348 /*
3349 * Retry the prov disc req attempt only for the peer that the user had
3350 * requested.
3351 */
3352
3353 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3354 if (os_memcmp(p2p->pending_pd_devaddr,
3355 dev->info.p2p_device_addr, ETH_ALEN) != 0)
3356 continue;
3357 if (!dev->req_config_methods)
3358 continue;
3359
3360 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3361 MACSTR " (config methods 0x%x)",
3362 MAC2STR(dev->info.p2p_device_addr),
3363 dev->req_config_methods);
3364 p2p_send_prov_disc_req(p2p, dev,
3365 dev->flags & P2P_DEV_PD_FOR_JOIN,
3366 p2p->pd_force_freq);
3367 return;
3368 }
3369 }
3370
3371
p2p_prov_disc_cb(struct p2p_data * p2p,int success)3372 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
3373 {
3374 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
3375 success);
3376
3377 /*
3378 * Postpone resetting the pending action state till after we actually
3379 * time out. This allows us to take some action like notifying any
3380 * interested parties about no response to the request.
3381 *
3382 * When the timer (below) goes off we check in IDLE, SEARCH, or
3383 * LISTEN_ONLY state, which are the only allowed states to issue a PD
3384 * requests in, if this was still pending and then raise notification.
3385 */
3386
3387 if (!success) {
3388 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3389
3390 if (p2p->user_initiated_pd &&
3391 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
3392 {
3393 /* Retry request from timeout to avoid busy loops */
3394 p2p->pending_action_state = P2P_PENDING_PD;
3395 p2p_set_timeout(p2p, 0, 50000);
3396 } else if (p2p->state != P2P_IDLE)
3397 p2p_continue_find(p2p);
3398 else if (p2p->user_initiated_pd) {
3399 p2p->pending_action_state = P2P_PENDING_PD;
3400 p2p_set_timeout(p2p, 0, 300000);
3401 }
3402 return;
3403 }
3404
3405 /*
3406 * If after PD Request the peer doesn't expect to receive PD Response
3407 * the PD Request ACK indicates a completion of the current PD. This
3408 * happens only on the advertiser side sending the follow-on PD Request
3409 * with the status different than 12 (Success: accepted by user).
3410 */
3411 if (p2p->p2ps_prov && !p2p->p2ps_prov->pd_seeker &&
3412 p2p->p2ps_prov->status != P2P_SC_SUCCESS_DEFERRED) {
3413 p2p_dbg(p2p, "P2PS PD completion on Follow-on PD Request ACK");
3414
3415 if (p2p->send_action_in_progress) {
3416 p2p->send_action_in_progress = 0;
3417 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3418 }
3419
3420 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3421
3422 if (p2p->cfg->p2ps_prov_complete) {
3423 p2p->cfg->p2ps_prov_complete(
3424 p2p->cfg->cb_ctx,
3425 p2p->p2ps_prov->status,
3426 p2p->p2ps_prov->adv_mac,
3427 p2p->p2ps_prov->adv_mac,
3428 p2p->p2ps_prov->session_mac,
3429 NULL, p2p->p2ps_prov->adv_id,
3430 p2p->p2ps_prov->session_id,
3431 0, 0, NULL, 0, 0, 0,
3432 NULL, NULL, 0, 0, NULL, 0);
3433 }
3434
3435 if (p2p->user_initiated_pd)
3436 p2p_reset_pending_pd(p2p);
3437
3438 p2ps_prov_free(p2p);
3439 return;
3440 }
3441
3442 /*
3443 * This postponing, of resetting pending_action_state, needs to be
3444 * done only for user initiated PD requests and not internal ones.
3445 */
3446 if (p2p->user_initiated_pd)
3447 p2p->pending_action_state = P2P_PENDING_PD;
3448 else
3449 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3450
3451 /* Wait for response from the peer */
3452 if (p2p->state == P2P_SEARCH)
3453 p2p_set_state(p2p, P2P_PD_DURING_FIND);
3454 p2p_set_timeout(p2p, 0, 200000);
3455 }
3456
3457
p2p_check_after_scan_tx_continuation(struct p2p_data * p2p)3458 static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p)
3459 {
3460 if (p2p->after_scan_tx_in_progress) {
3461 p2p->after_scan_tx_in_progress = 0;
3462 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3463 p2p_run_after_scan(p2p))
3464 return 1;
3465 if (p2p->state == P2P_SEARCH) {
3466 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3467 p2p_continue_find(p2p);
3468 }
3469 }
3470
3471 return 0;
3472 }
3473
3474
p2p_prov_disc_resp_cb(struct p2p_data * p2p,int success)3475 static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success)
3476 {
3477 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d",
3478 success);
3479
3480 if (p2p->send_action_in_progress) {
3481 p2p->send_action_in_progress = 0;
3482 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3483 }
3484
3485 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3486
3487 if (!success)
3488 goto continue_search;
3489
3490 if (!p2p->cfg->prov_disc_resp_cb ||
3491 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1)
3492 goto continue_search;
3493
3494 p2p_dbg(p2p,
3495 "Post-Provision Discovery operations started - do not try to continue other P2P operations");
3496 return;
3497
3498 continue_search:
3499 p2p_check_after_scan_tx_continuation(p2p);
3500 }
3501
3502
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)3503 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
3504 struct os_reltime *rx_time, int level, const u8 *ies,
3505 size_t ies_len)
3506 {
3507 if (os_reltime_before(rx_time, &p2p->find_start)) {
3508 /*
3509 * The driver may have cached (e.g., in cfg80211 BSS table) the
3510 * scan results for relatively long time. To avoid reporting
3511 * stale information, update P2P peers only based on results
3512 * that have based on frames received after the last p2p_find
3513 * operation was started.
3514 */
3515 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
3516 " (rx_time=%u.%06u find_start=%u.%06u)",
3517 MAC2STR(bssid), (unsigned int) rx_time->sec,
3518 (unsigned int) rx_time->usec,
3519 (unsigned int) p2p->find_start.sec,
3520 (unsigned int) p2p->find_start.usec);
3521 return 0;
3522 }
3523
3524 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
3525
3526 return 0;
3527 }
3528
3529
p2p_scan_res_handled(struct p2p_data * p2p)3530 void p2p_scan_res_handled(struct p2p_data *p2p)
3531 {
3532 if (!p2p->p2p_scan_running) {
3533 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
3534 }
3535 p2p->p2p_scan_running = 0;
3536 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3537
3538 if (p2p_run_after_scan(p2p))
3539 return;
3540 if (p2p->state == P2P_SEARCH)
3541 p2p_continue_find(p2p);
3542 }
3543
3544
p2p_scan_ie(struct p2p_data * p2p,struct wpabuf * ies,const u8 * dev_id,unsigned int bands)3545 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id,
3546 unsigned int bands)
3547 {
3548 u8 dev_capab;
3549 u8 *len;
3550
3551 #ifdef CONFIG_WIFI_DISPLAY
3552 if (p2p->wfd_ie_probe_req)
3553 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3554 #endif /* CONFIG_WIFI_DISPLAY */
3555
3556 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3557 wpabuf_put_buf(ies,
3558 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3559
3560 len = p2p_buf_add_ie_hdr(ies);
3561
3562 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3563
3564 /* P2PS requires Probe Request frames to include SD bit */
3565 if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3566 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
3567
3568 p2p_buf_add_capability(ies, dev_capab, 0);
3569
3570 if (dev_id)
3571 p2p_buf_add_device_id(ies, dev_id);
3572 if (p2p->cfg->reg_class && p2p->cfg->channel)
3573 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3574 p2p->cfg->reg_class,
3575 p2p->cfg->channel);
3576 if (p2p->ext_listen_interval)
3577 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3578 p2p->ext_listen_interval);
3579
3580 if (bands & BAND_60_GHZ)
3581 p2p_buf_add_device_info(ies, p2p, NULL);
3582
3583 if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3584 p2p_buf_add_service_hash(ies, p2p);
3585
3586 /* TODO: p2p_buf_add_operating_channel() if GO */
3587 p2p_buf_update_ie_hdr(ies, len);
3588 }
3589
3590
p2p_scan_ie_buf_len(struct p2p_data * p2p)3591 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3592 {
3593 size_t len = 100;
3594
3595 #ifdef CONFIG_WIFI_DISPLAY
3596 if (p2p && p2p->wfd_ie_probe_req)
3597 len += wpabuf_len(p2p->wfd_ie_probe_req);
3598 #endif /* CONFIG_WIFI_DISPLAY */
3599
3600 if (p2p && p2p->vendor_elem &&
3601 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3602 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3603
3604 return len;
3605 }
3606
3607
p2p_ie_text(struct wpabuf * p2p_ie,char * buf,char * end)3608 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3609 {
3610 return p2p_attr_text(p2p_ie, buf, end);
3611 }
3612
3613
p2p_go_neg_req_cb(struct p2p_data * p2p,int success)3614 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3615 {
3616 struct p2p_device *dev = p2p->go_neg_peer;
3617 int timeout;
3618
3619 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3620
3621 if (dev == NULL) {
3622 p2p_dbg(p2p, "No pending GO Negotiation");
3623 return;
3624 }
3625
3626 if (success) {
3627 if (dev->flags & P2P_DEV_USER_REJECTED) {
3628 p2p_set_state(p2p, P2P_IDLE);
3629 return;
3630 }
3631 } else if (dev->go_neg_req_sent) {
3632 /* Cancel the increment from p2p_connect_send() on failure */
3633 dev->go_neg_req_sent--;
3634 }
3635
3636 if (!success &&
3637 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3638 !is_zero_ether_addr(dev->member_in_go_dev)) {
3639 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3640 MAC2STR(dev->info.p2p_device_addr));
3641 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3642 p2p_send_dev_disc_req(p2p, dev);
3643 return;
3644 }
3645
3646 /*
3647 * Use P2P find, if needed, to find the other device from its listen
3648 * channel.
3649 */
3650 p2p_set_state(p2p, P2P_CONNECT);
3651 timeout = success ? 500000 : 100000;
3652 if (!success && p2p->go_neg_peer &&
3653 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3654 unsigned int r;
3655 /*
3656 * Peer is expected to wait our response and we will skip the
3657 * listen phase. Add some randomness to the wait time here to
3658 * make it less likely to hit cases where we could end up in
3659 * sync with peer not listening.
3660 */
3661 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3662 r = 0;
3663 timeout += r % 100000;
3664 }
3665 p2p_set_timeout(p2p, 0, timeout);
3666 }
3667
3668
p2p_go_neg_resp_cb(struct p2p_data * p2p,int success)3669 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3670 {
3671 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3672 success);
3673 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3674 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3675 return;
3676 }
3677 p2p_set_state(p2p, P2P_CONNECT);
3678 p2p_set_timeout(p2p, 0, 500000);
3679 }
3680
3681
p2p_go_neg_resp_failure_cb(struct p2p_data * p2p,int success,const u8 * addr)3682 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3683 const u8 *addr)
3684 {
3685 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3686 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3687 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3688 return;
3689 }
3690
3691 if (success) {
3692 struct p2p_device *dev;
3693 dev = p2p_get_device(p2p, addr);
3694 if (dev &&
3695 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3696 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3697 }
3698
3699 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
3700 p2p_continue_find(p2p);
3701 }
3702
3703
p2p_go_neg_conf_cb(struct p2p_data * p2p,enum p2p_send_action_result result)3704 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3705 enum p2p_send_action_result result)
3706 {
3707 struct p2p_device *dev;
3708
3709 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3710 if (result == P2P_SEND_ACTION_FAILED) {
3711 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3712 p2p_go_neg_failed(p2p, -1);
3713 return;
3714 }
3715
3716 dev = p2p->go_neg_peer;
3717
3718 if (result == P2P_SEND_ACTION_NO_ACK) {
3719 /*
3720 * Retry GO Negotiation Confirmation
3721 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3722 * ACK for confirmation.
3723 */
3724 if (dev && dev->go_neg_conf &&
3725 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3726 p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3727 dev->go_neg_conf_sent);
3728 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3729 if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3730 dev->info.p2p_device_addr,
3731 p2p->cfg->dev_addr,
3732 dev->info.p2p_device_addr,
3733 wpabuf_head(dev->go_neg_conf),
3734 wpabuf_len(dev->go_neg_conf), 0) >=
3735 0) {
3736 dev->go_neg_conf_sent++;
3737 return;
3738 }
3739 p2p_dbg(p2p, "Failed to re-send Action frame");
3740
3741 /*
3742 * Continue with the assumption that the first attempt
3743 * went through and just the ACK frame was lost.
3744 */
3745 }
3746
3747 /*
3748 * It looks like the TX status for GO Negotiation Confirm is
3749 * often showing failure even when the peer has actually
3750 * received the frame. Since the peer may change channels
3751 * immediately after having received the frame, we may not see
3752 * an Ack for retries, so just dropping a single frame may
3753 * trigger this. To allow the group formation to succeed if the
3754 * peer did indeed receive the frame, continue regardless of
3755 * the TX status.
3756 */
3757 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3758 }
3759
3760 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3761
3762 if (dev == NULL)
3763 return;
3764
3765 p2p_go_complete(p2p, dev);
3766 }
3767
3768
p2p_send_action_cb(struct p2p_data * p2p,unsigned int freq,const u8 * dst,const u8 * src,const u8 * bssid,enum p2p_send_action_result result)3769 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3770 const u8 *src, const u8 *bssid,
3771 enum p2p_send_action_result result)
3772 {
3773 enum p2p_pending_action_state state;
3774 int success;
3775
3776 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3777 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
3778 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3779 MAC2STR(bssid), result, p2p_state_txt(p2p->state));
3780 success = result == P2P_SEND_ACTION_SUCCESS;
3781 state = p2p->pending_action_state;
3782 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3783 switch (state) {
3784 case P2P_NO_PENDING_ACTION:
3785 if (p2p->send_action_in_progress) {
3786 p2p->send_action_in_progress = 0;
3787 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3788 }
3789 p2p_check_after_scan_tx_continuation(p2p);
3790 break;
3791 case P2P_PENDING_GO_NEG_REQUEST:
3792 p2p_go_neg_req_cb(p2p, success);
3793 break;
3794 case P2P_PENDING_GO_NEG_RESPONSE:
3795 p2p_go_neg_resp_cb(p2p, success);
3796 break;
3797 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3798 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3799 break;
3800 case P2P_PENDING_GO_NEG_CONFIRM:
3801 p2p_go_neg_conf_cb(p2p, result);
3802 break;
3803 case P2P_PENDING_SD:
3804 p2p_sd_cb(p2p, success);
3805 break;
3806 case P2P_PENDING_PD:
3807 p2p_prov_disc_cb(p2p, success);
3808 break;
3809 case P2P_PENDING_PD_RESPONSE:
3810 p2p_prov_disc_resp_cb(p2p, success);
3811 break;
3812 case P2P_PENDING_INVITATION_REQUEST:
3813 p2p_invitation_req_cb(p2p, success);
3814 break;
3815 case P2P_PENDING_INVITATION_RESPONSE:
3816 p2p_invitation_resp_cb(p2p, success);
3817 if (p2p->inv_status != P2P_SC_SUCCESS)
3818 p2p_check_after_scan_tx_continuation(p2p);
3819 break;
3820 case P2P_PENDING_DEV_DISC_REQUEST:
3821 p2p_dev_disc_req_cb(p2p, success);
3822 break;
3823 case P2P_PENDING_DEV_DISC_RESPONSE:
3824 p2p_dev_disc_resp_cb(p2p, success);
3825 break;
3826 case P2P_PENDING_GO_DISC_REQ:
3827 p2p_go_disc_req_cb(p2p, success);
3828 break;
3829 }
3830
3831 p2p->after_scan_tx_in_progress = 0;
3832 }
3833
3834
p2p_listen_cb(struct p2p_data * p2p,unsigned int freq,unsigned int duration)3835 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3836 unsigned int duration)
3837 {
3838 if (freq == p2p->pending_client_disc_freq) {
3839 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3840 p2p->pending_client_disc_freq = 0;
3841 return;
3842 }
3843
3844 if (freq != p2p->pending_listen_freq) {
3845 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3846 freq, duration, p2p->pending_listen_freq);
3847 return;
3848 }
3849
3850 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3851 p2p->pending_listen_sec, p2p->pending_listen_usec,
3852 p2p->pending_listen_freq);
3853 p2p->in_listen = 1;
3854 p2p->drv_in_listen = freq;
3855 if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3856 /*
3857 * Add 20 msec extra wait to avoid race condition with driver
3858 * remain-on-channel end event, i.e., give driver more time to
3859 * complete the operation before our timeout expires.
3860 */
3861 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3862 p2p->pending_listen_usec + 20000);
3863 }
3864
3865 p2p->pending_listen_freq = 0;
3866 }
3867
3868
p2p_listen_end(struct p2p_data * p2p,unsigned int freq)3869 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3870 {
3871 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3872 p2p->drv_in_listen = 0;
3873 if (p2p->in_listen)
3874 return 0; /* Internal timeout will trigger the next step */
3875
3876 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3877 if (p2p->go_neg_peer->connect_reqs >= 120) {
3878 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3879 p2p_go_neg_failed(p2p, -1);
3880 return 0;
3881 }
3882
3883 p2p_set_state(p2p, P2P_CONNECT);
3884 p2p_connect_send(p2p, p2p->go_neg_peer);
3885 return 1;
3886 } else if (p2p->state == P2P_SEARCH) {
3887 if (p2p->p2p_scan_running) {
3888 /*
3889 * Search is already in progress. This can happen if
3890 * an Action frame RX is reported immediately after
3891 * the end of a remain-on-channel operation and the
3892 * response frame to that is sent using an offchannel
3893 * operation while in p2p_find. Avoid an attempt to
3894 * restart a scan here.
3895 */
3896 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3897 return 1;
3898 }
3899 if (p2p->pending_listen_freq) {
3900 /*
3901 * Better wait a bit if the driver is unable to start
3902 * offchannel operation for some reason. p2p_search()
3903 * will be started from internal timeout.
3904 */
3905 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3906 p2p_set_timeout(p2p, 0, 100000);
3907 return 1;
3908 }
3909 if (p2p->search_delay) {
3910 p2p_dbg(p2p, "Delay search operation by %u ms",
3911 p2p->search_delay);
3912 p2p_set_timeout(p2p, p2p->search_delay / 1000,
3913 (p2p->search_delay % 1000) * 1000);
3914 return 1;
3915 }
3916 p2p_search(p2p);
3917 return 1;
3918 }
3919
3920 return 0;
3921 }
3922
3923
p2p_timeout_connect(struct p2p_data * p2p)3924 static void p2p_timeout_connect(struct p2p_data *p2p)
3925 {
3926 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3927 if (p2p->go_neg_peer &&
3928 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3929 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3930 p2p_go_neg_failed(p2p, -1);
3931 return;
3932 }
3933 if (p2p->go_neg_peer &&
3934 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3935 p2p->go_neg_peer->connect_reqs < 120) {
3936 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3937 p2p_connect_send(p2p, p2p->go_neg_peer);
3938 return;
3939 }
3940 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3941 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3942 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3943 p2p_set_timeout(p2p, 0, 30000);
3944 return;
3945 }
3946 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3947 p2p_listen_in_find(p2p, 0);
3948 }
3949
3950
p2p_timeout_connect_listen(struct p2p_data * p2p)3951 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3952 {
3953 if (p2p->go_neg_peer) {
3954 if (p2p->drv_in_listen) {
3955 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3956 return;
3957 }
3958
3959 if (p2p->go_neg_peer->connect_reqs >= 120) {
3960 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3961 p2p_go_neg_failed(p2p, -1);
3962 return;
3963 }
3964
3965 p2p_set_state(p2p, P2P_CONNECT);
3966 p2p_connect_send(p2p, p2p->go_neg_peer);
3967 } else
3968 p2p_set_state(p2p, P2P_IDLE);
3969 }
3970
3971
p2p_timeout_wait_peer_connect(struct p2p_data * p2p)3972 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3973 {
3974 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3975
3976 if (p2p->cfg->is_concurrent_session_active &&
3977 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3978 p2p_set_timeout(p2p, 0, 500000);
3979 else
3980 p2p_set_timeout(p2p, 0, 200000);
3981 }
3982
3983
p2p_timeout_wait_peer_idle(struct p2p_data * p2p)3984 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3985 {
3986 struct p2p_device *dev = p2p->go_neg_peer;
3987
3988 if (dev == NULL) {
3989 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3990 return;
3991 }
3992
3993 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3994 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3995 p2p_listen_in_find(p2p, 0);
3996 }
3997
3998
p2p_timeout_sd_during_find(struct p2p_data * p2p)3999 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
4000 {
4001 p2p_dbg(p2p, "Service Discovery Query timeout");
4002 if (p2p->sd_peer) {
4003 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
4004 p2p->sd_peer = NULL;
4005 }
4006 p2p_continue_find(p2p);
4007 }
4008
4009
p2p_timeout_prov_disc_during_find(struct p2p_data * p2p)4010 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
4011 {
4012 p2p_dbg(p2p, "Provision Discovery Request timeout");
4013 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
4014 p2p_continue_find(p2p);
4015 }
4016
4017
p2p_timeout_prov_disc_req(struct p2p_data * p2p)4018 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
4019 {
4020 u32 adv_id = 0;
4021 u8 *adv_mac = NULL;
4022
4023 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4024
4025 /*
4026 * For user initiated PD requests that we have not gotten any responses
4027 * for while in IDLE state, we retry them a couple of times before
4028 * giving up.
4029 */
4030 if (!p2p->user_initiated_pd)
4031 return;
4032
4033 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
4034
4035 if (p2p->pd_retries) {
4036 p2p->pd_retries--;
4037 p2p_retry_pd(p2p);
4038 } else {
4039 struct p2p_device *dev;
4040 int for_join = 0;
4041
4042 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
4043 if (os_memcmp(p2p->pending_pd_devaddr,
4044 dev->info.p2p_device_addr, ETH_ALEN) != 0)
4045 continue;
4046 if (dev->req_config_methods &&
4047 (dev->flags & P2P_DEV_PD_FOR_JOIN))
4048 for_join = 1;
4049 }
4050
4051 if (p2p->p2ps_prov) {
4052 adv_id = p2p->p2ps_prov->adv_id;
4053 adv_mac = p2p->p2ps_prov->adv_mac;
4054 }
4055
4056 if (p2p->cfg->prov_disc_fail)
4057 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
4058 p2p->pending_pd_devaddr,
4059 for_join ?
4060 P2P_PROV_DISC_TIMEOUT_JOIN :
4061 P2P_PROV_DISC_TIMEOUT,
4062 adv_id, adv_mac, NULL);
4063 p2p_reset_pending_pd(p2p);
4064 }
4065 }
4066
4067
p2p_timeout_invite(struct p2p_data * p2p)4068 static void p2p_timeout_invite(struct p2p_data *p2p)
4069 {
4070 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
4071 p2p_set_state(p2p, P2P_INVITE_LISTEN);
4072 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
4073 /*
4074 * Better remain on operating channel instead of listen channel
4075 * when running a group.
4076 */
4077 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
4078 p2p_set_timeout(p2p, 0, 100000);
4079 return;
4080 }
4081 p2p_listen_in_find(p2p, 0);
4082 }
4083
4084
p2p_timeout_invite_listen(struct p2p_data * p2p)4085 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
4086 {
4087 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
4088 p2p_set_state(p2p, P2P_INVITE);
4089 p2p_invite_send(p2p, p2p->invite_peer,
4090 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
4091 } else {
4092 if (p2p->invite_peer) {
4093 p2p_dbg(p2p, "Invitation Request retry limit reached");
4094 if (p2p->cfg->invitation_result)
4095 p2p->cfg->invitation_result(
4096 p2p->cfg->cb_ctx, -1, NULL, NULL,
4097 p2p->invite_peer->info.p2p_device_addr,
4098 0, 0);
4099 }
4100 p2p_set_state(p2p, P2P_IDLE);
4101 }
4102 }
4103
4104
p2p_state_timeout(void * eloop_ctx,void * timeout_ctx)4105 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
4106 {
4107 struct p2p_data *p2p = eloop_ctx;
4108
4109 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
4110
4111 p2p->in_listen = 0;
4112 if (p2p->drv_in_listen) {
4113 p2p_dbg(p2p, "Driver is still in listen state - stop it");
4114 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
4115 }
4116
4117 switch (p2p->state) {
4118 case P2P_IDLE:
4119 /* Check if we timed out waiting for PD req */
4120 if (p2p->pending_action_state == P2P_PENDING_PD)
4121 p2p_timeout_prov_disc_req(p2p);
4122 break;
4123 case P2P_SEARCH:
4124 /* Check if we timed out waiting for PD req */
4125 if (p2p->pending_action_state == P2P_PENDING_PD)
4126 p2p_timeout_prov_disc_req(p2p);
4127 if (p2p->search_delay && !p2p->in_search_delay) {
4128 p2p_dbg(p2p, "Delay search operation by %u ms",
4129 p2p->search_delay);
4130 p2p->in_search_delay = 1;
4131 p2p_set_timeout(p2p, p2p->search_delay / 1000,
4132 (p2p->search_delay % 1000) * 1000);
4133 break;
4134 }
4135 p2p->in_search_delay = 0;
4136 p2p_search(p2p);
4137 break;
4138 case P2P_CONNECT:
4139 p2p_timeout_connect(p2p);
4140 break;
4141 case P2P_CONNECT_LISTEN:
4142 p2p_timeout_connect_listen(p2p);
4143 break;
4144 case P2P_GO_NEG:
4145 break;
4146 case P2P_LISTEN_ONLY:
4147 /* Check if we timed out waiting for PD req */
4148 if (p2p->pending_action_state == P2P_PENDING_PD)
4149 p2p_timeout_prov_disc_req(p2p);
4150
4151 if (p2p->ext_listen_only) {
4152 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
4153 p2p->ext_listen_only = 0;
4154 p2p_set_state(p2p, P2P_IDLE);
4155 }
4156 break;
4157 case P2P_WAIT_PEER_CONNECT:
4158 p2p_timeout_wait_peer_connect(p2p);
4159 break;
4160 case P2P_WAIT_PEER_IDLE:
4161 p2p_timeout_wait_peer_idle(p2p);
4162 break;
4163 case P2P_SD_DURING_FIND:
4164 p2p_timeout_sd_during_find(p2p);
4165 break;
4166 case P2P_PROVISIONING:
4167 break;
4168 case P2P_PD_DURING_FIND:
4169 p2p_timeout_prov_disc_during_find(p2p);
4170 break;
4171 case P2P_INVITE:
4172 p2p_timeout_invite(p2p);
4173 break;
4174 case P2P_INVITE_LISTEN:
4175 p2p_timeout_invite_listen(p2p);
4176 break;
4177 }
4178 }
4179
4180
p2p_reject(struct p2p_data * p2p,const u8 * peer_addr)4181 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
4182 {
4183 struct p2p_device *dev;
4184
4185 dev = p2p_get_device(p2p, peer_addr);
4186 p2p_dbg(p2p, "Local request to reject connection attempts by peer "
4187 MACSTR, MAC2STR(peer_addr));
4188 if (dev == NULL) {
4189 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
4190 return -1;
4191 }
4192 dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
4193 dev->flags |= P2P_DEV_USER_REJECTED;
4194 return 0;
4195 }
4196
4197
p2p_wps_method_text(enum p2p_wps_method method)4198 const char * p2p_wps_method_text(enum p2p_wps_method method)
4199 {
4200 switch (method) {
4201 case WPS_NOT_READY:
4202 return "not-ready";
4203 case WPS_PIN_DISPLAY:
4204 return "Display";
4205 case WPS_PIN_KEYPAD:
4206 return "Keypad";
4207 case WPS_PBC:
4208 return "PBC";
4209 case WPS_NFC:
4210 return "NFC";
4211 case WPS_P2PS:
4212 return "P2PS";
4213 }
4214
4215 return "??";
4216 }
4217
4218
p2p_go_state_text(enum p2p_go_state go_state)4219 static const char * p2p_go_state_text(enum p2p_go_state go_state)
4220 {
4221 switch (go_state) {
4222 case UNKNOWN_GO:
4223 return "unknown";
4224 case LOCAL_GO:
4225 return "local";
4226 case REMOTE_GO:
4227 return "remote";
4228 }
4229
4230 return "??";
4231 }
4232
4233
p2p_get_peer_info(struct p2p_data * p2p,const u8 * addr,int next)4234 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
4235 const u8 *addr, int next)
4236 {
4237 struct p2p_device *dev;
4238
4239 if (addr)
4240 dev = p2p_get_device(p2p, addr);
4241 else
4242 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4243
4244 if (dev && next) {
4245 dev = dl_list_first(&dev->list, struct p2p_device, list);
4246 if (&dev->list == &p2p->devices)
4247 dev = NULL;
4248 }
4249
4250 if (dev == NULL)
4251 return NULL;
4252
4253 return &dev->info;
4254 }
4255
4256
p2p_get_peer_info_txt(const struct p2p_peer_info * info,char * buf,size_t buflen)4257 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
4258 char *buf, size_t buflen)
4259 {
4260 struct p2p_device *dev;
4261 int res;
4262 char *pos, *end;
4263 struct os_reltime now;
4264
4265 if (info == NULL)
4266 return -1;
4267
4268 dev = (struct p2p_device *) (((u8 *) info) -
4269 offsetof(struct p2p_device, info));
4270
4271 pos = buf;
4272 end = buf + buflen;
4273
4274 os_get_reltime(&now);
4275 res = os_snprintf(pos, end - pos,
4276 "age=%d\n"
4277 "listen_freq=%d\n"
4278 "wps_method=%s\n"
4279 "interface_addr=" MACSTR "\n"
4280 "member_in_go_dev=" MACSTR "\n"
4281 "member_in_go_iface=" MACSTR "\n"
4282 "go_neg_req_sent=%d\n"
4283 "go_state=%s\n"
4284 "dialog_token=%u\n"
4285 "intended_addr=" MACSTR "\n"
4286 "country=%c%c\n"
4287 "oper_freq=%d\n"
4288 "req_config_methods=0x%x\n"
4289 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
4290 "status=%d\n"
4291 "invitation_reqs=%u\n",
4292 (int) (now.sec - dev->last_seen.sec),
4293 dev->listen_freq,
4294 p2p_wps_method_text(dev->wps_method),
4295 MAC2STR(dev->interface_addr),
4296 MAC2STR(dev->member_in_go_dev),
4297 MAC2STR(dev->member_in_go_iface),
4298 dev->go_neg_req_sent,
4299 p2p_go_state_text(dev->go_state),
4300 dev->dialog_token,
4301 MAC2STR(dev->intended_addr),
4302 dev->country[0] ? dev->country[0] : '_',
4303 dev->country[1] ? dev->country[1] : '_',
4304 dev->oper_freq,
4305 dev->req_config_methods,
4306 dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
4307 "[PROBE_REQ_ONLY]" : "",
4308 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
4309 dev->flags & P2P_DEV_NOT_YET_READY ?
4310 "[NOT_YET_READY]" : "",
4311 dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
4312 "[PD_PEER_DISPLAY]" : "",
4313 dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
4314 "[PD_PEER_KEYPAD]" : "",
4315 dev->flags & P2P_DEV_PD_PEER_P2PS ?
4316 "[PD_PEER_P2PS]" : "",
4317 dev->flags & P2P_DEV_USER_REJECTED ?
4318 "[USER_REJECTED]" : "",
4319 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
4320 "[PEER_WAITING_RESPONSE]" : "",
4321 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
4322 "[PREFER_PERSISTENT_GROUP]" : "",
4323 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
4324 "[WAIT_GO_NEG_RESPONSE]" : "",
4325 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
4326 "[WAIT_GO_NEG_CONFIRM]" : "",
4327 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
4328 "[GROUP_CLIENT_ONLY]" : "",
4329 dev->flags & P2P_DEV_FORCE_FREQ ?
4330 "[FORCE_FREQ]" : "",
4331 dev->flags & P2P_DEV_PD_FOR_JOIN ?
4332 "[PD_FOR_JOIN]" : "",
4333 dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT ?
4334 "[LAST_SEEN_AS_GROUP_CLIENT]" : "",
4335 dev->status,
4336 dev->invitation_reqs);
4337 if (os_snprintf_error(end - pos, res))
4338 return pos - buf;
4339 pos += res;
4340
4341 if (dev->ext_listen_period) {
4342 res = os_snprintf(pos, end - pos,
4343 "ext_listen_period=%u\n"
4344 "ext_listen_interval=%u\n",
4345 dev->ext_listen_period,
4346 dev->ext_listen_interval);
4347 if (os_snprintf_error(end - pos, res))
4348 return pos - buf;
4349 pos += res;
4350 }
4351
4352 if (dev->oper_ssid_len) {
4353 res = os_snprintf(pos, end - pos,
4354 "oper_ssid=%s\n",
4355 wpa_ssid_txt(dev->oper_ssid,
4356 dev->oper_ssid_len));
4357 if (os_snprintf_error(end - pos, res))
4358 return pos - buf;
4359 pos += res;
4360 }
4361
4362 #ifdef CONFIG_WIFI_DISPLAY
4363 if (dev->info.wfd_subelems) {
4364 res = os_snprintf(pos, end - pos, "wfd_subelems=");
4365 if (os_snprintf_error(end - pos, res))
4366 return pos - buf;
4367 pos += res;
4368
4369 pos += wpa_snprintf_hex(pos, end - pos,
4370 wpabuf_head(dev->info.wfd_subelems),
4371 wpabuf_len(dev->info.wfd_subelems));
4372
4373 res = os_snprintf(pos, end - pos, "\n");
4374 if (os_snprintf_error(end - pos, res))
4375 return pos - buf;
4376 pos += res;
4377 }
4378 #endif /* CONFIG_WIFI_DISPLAY */
4379
4380 return pos - buf;
4381 }
4382
4383
p2p_peer_known(struct p2p_data * p2p,const u8 * addr)4384 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
4385 {
4386 return p2p_get_device(p2p, addr) != NULL;
4387 }
4388
4389
p2p_set_client_discoverability(struct p2p_data * p2p,int enabled)4390 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
4391 {
4392 if (enabled) {
4393 p2p_dbg(p2p, "Client discoverability enabled");
4394 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4395 } else {
4396 p2p_dbg(p2p, "Client discoverability disabled");
4397 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4398 }
4399 }
4400
4401
p2p_build_presence_req(u32 duration1,u32 interval1,u32 duration2,u32 interval2)4402 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
4403 u32 duration2, u32 interval2)
4404 {
4405 struct wpabuf *req;
4406 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
4407 u8 *len;
4408
4409 req = wpabuf_alloc(100);
4410 if (req == NULL)
4411 return NULL;
4412
4413 if (duration1 || interval1) {
4414 os_memset(&desc1, 0, sizeof(desc1));
4415 desc1.count_type = 1;
4416 desc1.duration = duration1;
4417 desc1.interval = interval1;
4418 ptr1 = &desc1;
4419
4420 if (duration2 || interval2) {
4421 os_memset(&desc2, 0, sizeof(desc2));
4422 desc2.count_type = 2;
4423 desc2.duration = duration2;
4424 desc2.interval = interval2;
4425 ptr2 = &desc2;
4426 }
4427 }
4428
4429 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
4430 len = p2p_buf_add_ie_hdr(req);
4431 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
4432 p2p_buf_update_ie_hdr(req, len);
4433
4434 return req;
4435 }
4436
4437
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)4438 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
4439 const u8 *own_interface_addr, unsigned int freq,
4440 u32 duration1, u32 interval1, u32 duration2,
4441 u32 interval2)
4442 {
4443 struct wpabuf *req;
4444
4445 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
4446 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
4447 "dur2=%u int2=%u",
4448 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
4449 freq, duration1, interval1, duration2, interval2);
4450
4451 req = p2p_build_presence_req(duration1, interval1, duration2,
4452 interval2);
4453 if (req == NULL)
4454 return -1;
4455
4456 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4457 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
4458 go_interface_addr,
4459 wpabuf_head(req), wpabuf_len(req), 200) < 0) {
4460 p2p_dbg(p2p, "Failed to send Action frame");
4461 }
4462 wpabuf_free(req);
4463
4464 return 0;
4465 }
4466
4467
p2p_build_presence_resp(u8 status,const u8 * noa,size_t noa_len,u8 dialog_token)4468 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
4469 size_t noa_len, u8 dialog_token)
4470 {
4471 struct wpabuf *resp;
4472 u8 *len;
4473
4474 resp = wpabuf_alloc(100 + noa_len);
4475 if (resp == NULL)
4476 return NULL;
4477
4478 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
4479 len = p2p_buf_add_ie_hdr(resp);
4480 p2p_buf_add_status(resp, status);
4481 if (noa) {
4482 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
4483 wpabuf_put_le16(resp, noa_len);
4484 wpabuf_put_data(resp, noa, noa_len);
4485 } else
4486 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
4487 p2p_buf_update_ie_hdr(resp, len);
4488
4489 return resp;
4490 }
4491
4492
p2p_process_presence_req(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len,int rx_freq)4493 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
4494 const u8 *sa, const u8 *data, size_t len,
4495 int rx_freq)
4496 {
4497 struct p2p_message msg;
4498 u8 status;
4499 struct wpabuf *resp;
4500 size_t g;
4501 struct p2p_group *group = NULL;
4502 int parsed = 0;
4503 u8 noa[50];
4504 int noa_len;
4505
4506 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
4507
4508 for (g = 0; g < p2p->num_groups; g++) {
4509 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
4510 ETH_ALEN) == 0) {
4511 group = p2p->groups[g];
4512 break;
4513 }
4514 }
4515 if (group == NULL) {
4516 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
4517 MACSTR, MAC2STR(da));
4518 return;
4519 }
4520
4521 if (p2p_parse(data, len, &msg) < 0) {
4522 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
4523 status = P2P_SC_FAIL_INVALID_PARAMS;
4524 goto fail;
4525 }
4526 parsed = 1;
4527
4528 if (msg.noa == NULL) {
4529 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
4530 status = P2P_SC_FAIL_INVALID_PARAMS;
4531 goto fail;
4532 }
4533
4534 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
4535
4536 fail:
4537 if (p2p->cfg->get_noa)
4538 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
4539 sizeof(noa));
4540 else
4541 noa_len = -1;
4542 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
4543 noa_len > 0 ? noa_len : 0,
4544 msg.dialog_token);
4545 if (parsed)
4546 p2p_parse_free(&msg);
4547 if (resp == NULL)
4548 return;
4549
4550 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4551 if (p2p_send_action(p2p, rx_freq, sa, da, da,
4552 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
4553 p2p_dbg(p2p, "Failed to send Action frame");
4554 }
4555 wpabuf_free(resp);
4556 }
4557
4558
p2p_process_presence_resp(struct p2p_data * p2p,const u8 * da,const u8 * sa,const u8 * data,size_t len)4559 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
4560 const u8 *sa, const u8 *data, size_t len)
4561 {
4562 struct p2p_message msg;
4563
4564 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
4565
4566 if (p2p_parse(data, len, &msg) < 0) {
4567 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
4568 return;
4569 }
4570
4571 if (msg.status == NULL || msg.noa == NULL) {
4572 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
4573 p2p_parse_free(&msg);
4574 return;
4575 }
4576
4577 if (p2p->cfg->presence_resp) {
4578 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4579 msg.noa, msg.noa_len);
4580 }
4581
4582 if (*msg.status) {
4583 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4584 *msg.status);
4585 p2p_parse_free(&msg);
4586 return;
4587 }
4588
4589 p2p_dbg(p2p, "P2P Presence Request was accepted");
4590 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4591 msg.noa, msg.noa_len);
4592 /* TODO: process NoA */
4593 p2p_parse_free(&msg);
4594 }
4595
4596
p2p_ext_listen_timeout(void * eloop_ctx,void * timeout_ctx)4597 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4598 {
4599 struct p2p_data *p2p = eloop_ctx;
4600
4601 if (p2p->ext_listen_interval) {
4602 /* Schedule next extended listen timeout */
4603 eloop_register_timeout(p2p->ext_listen_interval_sec,
4604 p2p->ext_listen_interval_usec,
4605 p2p_ext_listen_timeout, p2p, NULL);
4606 }
4607
4608 if ((p2p->cfg->is_p2p_in_progress &&
4609 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4610 (p2p->pending_action_state == P2P_PENDING_PD &&
4611 p2p->pd_retries > 0)) {
4612 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4613 p2p_state_txt(p2p->state));
4614 return;
4615 }
4616
4617 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4618 /*
4619 * This should not really happen, but it looks like the Listen
4620 * command may fail is something else (e.g., a scan) was
4621 * running at an inconvenient time. As a workaround, allow new
4622 * Extended Listen operation to be started.
4623 */
4624 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4625 p2p->ext_listen_only = 0;
4626 p2p_set_state(p2p, P2P_IDLE);
4627 }
4628
4629 if (p2p->state != P2P_IDLE) {
4630 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4631 return;
4632 }
4633
4634 p2p_dbg(p2p, "Extended Listen timeout");
4635 p2p->ext_listen_only = 1;
4636 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4637 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4638 p2p->ext_listen_only = 0;
4639 }
4640 }
4641
4642
p2p_ext_listen(struct p2p_data * p2p,unsigned int period,unsigned int interval)4643 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4644 unsigned int interval)
4645 {
4646 if (period > 65535 || interval > 65535 || period > interval ||
4647 (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4648 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4649 period, interval);
4650 return -1;
4651 }
4652
4653 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4654
4655 if (interval == 0) {
4656 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4657 p2p->ext_listen_period = 0;
4658 p2p->ext_listen_interval = 0;
4659 return 0;
4660 }
4661
4662 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4663 period, interval);
4664 p2p->ext_listen_period = period;
4665 p2p->ext_listen_interval = interval;
4666 p2p->ext_listen_interval_sec = interval / 1000;
4667 p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4668
4669 eloop_register_timeout(p2p->ext_listen_interval_sec,
4670 p2p->ext_listen_interval_usec,
4671 p2p_ext_listen_timeout, p2p, NULL);
4672
4673 return 0;
4674 }
4675
4676
p2p_deauth_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)4677 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4678 const u8 *ie, size_t ie_len)
4679 {
4680 struct p2p_message msg;
4681
4682 if (bssid == NULL || ie == NULL)
4683 return;
4684
4685 os_memset(&msg, 0, sizeof(msg));
4686 if (p2p_parse_ies(ie, ie_len, &msg))
4687 return;
4688 if (msg.minor_reason_code == NULL) {
4689 p2p_parse_free(&msg);
4690 return;
4691 }
4692
4693 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4694 " reason_code=%u minor_reason_code=%u",
4695 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4696
4697 p2p_parse_free(&msg);
4698 }
4699
4700
p2p_disassoc_notif(struct p2p_data * p2p,const u8 * bssid,u16 reason_code,const u8 * ie,size_t ie_len)4701 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4702 const u8 *ie, size_t ie_len)
4703 {
4704 struct p2p_message msg;
4705
4706 if (bssid == NULL || ie == NULL)
4707 return;
4708
4709 os_memset(&msg, 0, sizeof(msg));
4710 if (p2p_parse_ies(ie, ie_len, &msg))
4711 return;
4712 if (msg.minor_reason_code == NULL) {
4713 p2p_parse_free(&msg);
4714 return;
4715 }
4716
4717 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4718 " reason_code=%u minor_reason_code=%u",
4719 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4720
4721 p2p_parse_free(&msg);
4722 }
4723
4724
p2p_set_managed_oper(struct p2p_data * p2p,int enabled)4725 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4726 {
4727 if (enabled) {
4728 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4729 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4730 } else {
4731 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4732 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4733 }
4734 }
4735
4736
p2p_config_get_random_social(struct p2p_config * p2p,u8 * op_class,u8 * op_channel)4737 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4738 u8 *op_channel)
4739 {
4740 return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4741 }
4742
4743
p2p_set_listen_channel(struct p2p_data * p2p,u8 reg_class,u8 channel,u8 forced)4744 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4745 u8 forced)
4746 {
4747 if (p2p_channel_to_freq(reg_class, channel) < 0)
4748 return -1;
4749
4750 /*
4751 * Listen channel was set in configuration or set by control interface;
4752 * cannot override it.
4753 */
4754 if (p2p->cfg->channel_forced && forced == 0) {
4755 p2p_dbg(p2p,
4756 "Listen channel was previously configured - do not override based on optimization");
4757 return -1;
4758 }
4759
4760 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4761 reg_class, channel);
4762
4763 if (p2p->state == P2P_IDLE) {
4764 p2p->cfg->reg_class = reg_class;
4765 p2p->cfg->channel = channel;
4766 p2p->cfg->channel_forced = forced;
4767 } else {
4768 p2p_dbg(p2p, "Defer setting listen channel");
4769 p2p->pending_reg_class = reg_class;
4770 p2p->pending_channel = channel;
4771 p2p->pending_channel_forced = forced;
4772 }
4773
4774 return 0;
4775 }
4776
4777
p2p_get_listen_channel(struct p2p_data * p2p)4778 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4779 {
4780 return p2p->cfg->channel;
4781 }
4782
4783
p2p_set_ssid_postfix(struct p2p_data * p2p,const u8 * postfix,size_t len)4784 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4785 {
4786 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4787 if (postfix == NULL) {
4788 p2p->cfg->ssid_postfix_len = 0;
4789 return 0;
4790 }
4791 if (len > sizeof(p2p->cfg->ssid_postfix))
4792 return -1;
4793 os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4794 p2p->cfg->ssid_postfix_len = len;
4795 return 0;
4796 }
4797
4798
p2p_set_oper_channel(struct p2p_data * p2p,u8 op_reg_class,u8 op_channel,int cfg_op_channel)4799 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4800 int cfg_op_channel)
4801 {
4802 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4803 return -1;
4804
4805 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4806 op_reg_class, op_channel);
4807 p2p->cfg->op_reg_class = op_reg_class;
4808 p2p->cfg->op_channel = op_channel;
4809 p2p->cfg->cfg_op_channel = cfg_op_channel;
4810 return 0;
4811 }
4812
4813
p2p_set_pref_chan(struct p2p_data * p2p,unsigned int num_pref_chan,const struct p2p_channel * pref_chan)4814 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4815 const struct p2p_channel *pref_chan)
4816 {
4817 struct p2p_channel *n;
4818
4819 if (pref_chan) {
4820 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4821 if (n == NULL)
4822 return -1;
4823 os_memcpy(n, pref_chan,
4824 num_pref_chan * sizeof(struct p2p_channel));
4825 } else
4826 n = NULL;
4827
4828 os_free(p2p->cfg->pref_chan);
4829 p2p->cfg->pref_chan = n;
4830 p2p->cfg->num_pref_chan = num_pref_chan;
4831
4832 return 0;
4833 }
4834
4835
p2p_set_no_go_freq(struct p2p_data * p2p,const struct wpa_freq_range_list * list)4836 int p2p_set_no_go_freq(struct p2p_data *p2p,
4837 const struct wpa_freq_range_list *list)
4838 {
4839 struct wpa_freq_range *tmp;
4840
4841 if (list == NULL || list->num == 0) {
4842 os_free(p2p->no_go_freq.range);
4843 p2p->no_go_freq.range = NULL;
4844 p2p->no_go_freq.num = 0;
4845 return 0;
4846 }
4847
4848 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4849 if (tmp == NULL)
4850 return -1;
4851 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4852 os_free(p2p->no_go_freq.range);
4853 p2p->no_go_freq.range = tmp;
4854 p2p->no_go_freq.num = list->num;
4855 p2p_dbg(p2p, "Updated no GO chan list");
4856
4857 return 0;
4858 }
4859
4860
p2p_get_interface_addr(struct p2p_data * p2p,const u8 * dev_addr,u8 * iface_addr)4861 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4862 u8 *iface_addr)
4863 {
4864 struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4865 if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4866 return -1;
4867 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4868 return 0;
4869 }
4870
4871
p2p_get_dev_addr(struct p2p_data * p2p,const u8 * iface_addr,u8 * dev_addr)4872 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4873 u8 *dev_addr)
4874 {
4875 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4876 if (dev == NULL)
4877 return -1;
4878 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4879 return 0;
4880 }
4881
4882
p2p_set_peer_filter(struct p2p_data * p2p,const u8 * addr)4883 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4884 {
4885 os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4886 if (is_zero_ether_addr(p2p->peer_filter))
4887 p2p_dbg(p2p, "Disable peer filter");
4888 else
4889 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4890 MAC2STR(p2p->peer_filter));
4891 }
4892
4893
p2p_set_cross_connect(struct p2p_data * p2p,int enabled)4894 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4895 {
4896 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4897 if (p2p->cross_connect == enabled)
4898 return;
4899 p2p->cross_connect = enabled;
4900 /* TODO: may need to tear down any action group where we are GO(?) */
4901 }
4902
4903
p2p_get_oper_freq(struct p2p_data * p2p,const u8 * iface_addr)4904 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4905 {
4906 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4907 if (dev == NULL)
4908 return -1;
4909 if (dev->oper_freq <= 0)
4910 return -1;
4911 return dev->oper_freq;
4912 }
4913
4914
p2p_set_intra_bss_dist(struct p2p_data * p2p,int enabled)4915 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4916 {
4917 p2p_dbg(p2p, "Intra BSS distribution %s",
4918 enabled ? "enabled" : "disabled");
4919 p2p->cfg->p2p_intra_bss = enabled;
4920 }
4921
4922
p2p_update_channel_list(struct p2p_data * p2p,const struct p2p_channels * chan,const struct p2p_channels * cli_chan)4923 void p2p_update_channel_list(struct p2p_data *p2p,
4924 const struct p2p_channels *chan,
4925 const struct p2p_channels *cli_chan)
4926 {
4927 p2p_dbg(p2p, "Update channel list");
4928 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4929 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4930 os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4931 sizeof(struct p2p_channels));
4932 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4933 }
4934
4935
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)4936 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4937 const u8 *src, const u8 *bssid, const u8 *buf,
4938 size_t len, unsigned int wait_time)
4939 {
4940 if (p2p->p2p_scan_running) {
4941 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4942 if (p2p->after_scan_tx) {
4943 p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4944 os_free(p2p->after_scan_tx);
4945 }
4946 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4947 len);
4948 if (p2p->after_scan_tx == NULL)
4949 return -1;
4950 p2p->after_scan_tx->freq = freq;
4951 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4952 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4953 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4954 p2p->after_scan_tx->len = len;
4955 p2p->after_scan_tx->wait_time = wait_time;
4956 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4957 return 0;
4958 }
4959
4960 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4961 buf, len, wait_time);
4962 }
4963
4964
p2p_set_best_channels(struct p2p_data * p2p,int freq_24,int freq_5,int freq_overall)4965 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4966 int freq_overall)
4967 {
4968 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d",
4969 freq_24, freq_5, freq_overall);
4970 p2p->best_freq_24 = freq_24;
4971 p2p->best_freq_5 = freq_5;
4972 p2p->best_freq_overall = freq_overall;
4973 }
4974
4975
p2p_set_own_freq_preference(struct p2p_data * p2p,int freq)4976 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4977 {
4978 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4979 p2p->own_freq_preference = freq;
4980 }
4981
4982
p2p_get_go_neg_peer(struct p2p_data * p2p)4983 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4984 {
4985 if (p2p == NULL || p2p->go_neg_peer == NULL)
4986 return NULL;
4987 return p2p->go_neg_peer->info.p2p_device_addr;
4988 }
4989
4990
4991 const struct p2p_peer_info *
p2p_get_peer_found(struct p2p_data * p2p,const u8 * addr,int next)4992 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4993 {
4994 struct p2p_device *dev;
4995
4996 if (addr) {
4997 dev = p2p_get_device(p2p, addr);
4998 if (!dev)
4999 return NULL;
5000
5001 if (!next) {
5002 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
5003 return NULL;
5004
5005 return &dev->info;
5006 } else {
5007 do {
5008 dev = dl_list_first(&dev->list,
5009 struct p2p_device,
5010 list);
5011 if (!dev || &dev->list == &p2p->devices)
5012 return NULL;
5013 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
5014 }
5015 } else {
5016 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
5017 if (!dev)
5018 return NULL;
5019 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
5020 dev = dl_list_first(&dev->list,
5021 struct p2p_device,
5022 list);
5023 if (!dev || &dev->list == &p2p->devices)
5024 return NULL;
5025 }
5026 }
5027
5028 return &dev->info;
5029 }
5030
5031
p2p_in_progress(struct p2p_data * p2p)5032 int p2p_in_progress(struct p2p_data *p2p)
5033 {
5034 if (p2p == NULL)
5035 return 0;
5036 if (p2p->state == P2P_SEARCH)
5037 return 2;
5038 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
5039 }
5040
5041
p2p_set_config_timeout(struct p2p_data * p2p,u8 go_timeout,u8 client_timeout)5042 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
5043 u8 client_timeout)
5044 {
5045 if (p2p) {
5046 p2p->go_timeout = go_timeout;
5047 p2p->client_timeout = client_timeout;
5048 }
5049 }
5050
5051
5052 #ifdef CONFIG_WIFI_DISPLAY
5053
p2p_update_wfd_ie_groups(struct p2p_data * p2p)5054 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
5055 {
5056 size_t g;
5057 struct p2p_group *group;
5058
5059 for (g = 0; g < p2p->num_groups; g++) {
5060 group = p2p->groups[g];
5061 p2p_group_force_beacon_update_ies(group);
5062 }
5063 }
5064
5065
p2p_set_wfd_ie_beacon(struct p2p_data * p2p,struct wpabuf * ie)5066 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
5067 {
5068 wpabuf_free(p2p->wfd_ie_beacon);
5069 p2p->wfd_ie_beacon = ie;
5070 p2p_update_wfd_ie_groups(p2p);
5071 return 0;
5072 }
5073
5074
p2p_set_wfd_ie_probe_req(struct p2p_data * p2p,struct wpabuf * ie)5075 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
5076 {
5077 wpabuf_free(p2p->wfd_ie_probe_req);
5078 p2p->wfd_ie_probe_req = ie;
5079 return 0;
5080 }
5081
5082
p2p_set_wfd_ie_probe_resp(struct p2p_data * p2p,struct wpabuf * ie)5083 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
5084 {
5085 wpabuf_free(p2p->wfd_ie_probe_resp);
5086 p2p->wfd_ie_probe_resp = ie;
5087 p2p_update_wfd_ie_groups(p2p);
5088 return 0;
5089 }
5090
5091
p2p_set_wfd_ie_assoc_req(struct p2p_data * p2p,struct wpabuf * ie)5092 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
5093 {
5094 wpabuf_free(p2p->wfd_ie_assoc_req);
5095 p2p->wfd_ie_assoc_req = ie;
5096 return 0;
5097 }
5098
5099
p2p_set_wfd_ie_invitation(struct p2p_data * p2p,struct wpabuf * ie)5100 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
5101 {
5102 wpabuf_free(p2p->wfd_ie_invitation);
5103 p2p->wfd_ie_invitation = ie;
5104 return 0;
5105 }
5106
5107
p2p_set_wfd_ie_prov_disc_req(struct p2p_data * p2p,struct wpabuf * ie)5108 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
5109 {
5110 wpabuf_free(p2p->wfd_ie_prov_disc_req);
5111 p2p->wfd_ie_prov_disc_req = ie;
5112 return 0;
5113 }
5114
5115
p2p_set_wfd_ie_prov_disc_resp(struct p2p_data * p2p,struct wpabuf * ie)5116 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
5117 {
5118 wpabuf_free(p2p->wfd_ie_prov_disc_resp);
5119 p2p->wfd_ie_prov_disc_resp = ie;
5120 return 0;
5121 }
5122
5123
p2p_set_wfd_ie_go_neg(struct p2p_data * p2p,struct wpabuf * ie)5124 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
5125 {
5126 wpabuf_free(p2p->wfd_ie_go_neg);
5127 p2p->wfd_ie_go_neg = ie;
5128 return 0;
5129 }
5130
5131
p2p_set_wfd_dev_info(struct p2p_data * p2p,const struct wpabuf * elem)5132 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
5133 {
5134 wpabuf_free(p2p->wfd_dev_info);
5135 if (elem) {
5136 p2p->wfd_dev_info = wpabuf_dup(elem);
5137 if (p2p->wfd_dev_info == NULL)
5138 return -1;
5139 } else
5140 p2p->wfd_dev_info = NULL;
5141
5142 return 0;
5143 }
5144
5145
p2p_set_wfd_assoc_bssid(struct p2p_data * p2p,const struct wpabuf * elem)5146 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
5147 {
5148 wpabuf_free(p2p->wfd_assoc_bssid);
5149 if (elem) {
5150 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
5151 if (p2p->wfd_assoc_bssid == NULL)
5152 return -1;
5153 } else
5154 p2p->wfd_assoc_bssid = NULL;
5155
5156 return 0;
5157 }
5158
5159
p2p_set_wfd_coupled_sink_info(struct p2p_data * p2p,const struct wpabuf * elem)5160 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
5161 const struct wpabuf *elem)
5162 {
5163 wpabuf_free(p2p->wfd_coupled_sink_info);
5164 if (elem) {
5165 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
5166 if (p2p->wfd_coupled_sink_info == NULL)
5167 return -1;
5168 } else
5169 p2p->wfd_coupled_sink_info = NULL;
5170
5171 return 0;
5172 }
5173
5174 #endif /* CONFIG_WIFI_DISPLAY */
5175
5176
p2p_set_disc_int(struct p2p_data * p2p,int min_disc_int,int max_disc_int,int max_disc_tu)5177 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
5178 int max_disc_tu)
5179 {
5180 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
5181 return -1;
5182
5183 p2p->min_disc_int = min_disc_int;
5184 p2p->max_disc_int = max_disc_int;
5185 p2p->max_disc_tu = max_disc_tu;
5186 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
5187 min_disc_int, max_disc_int, max_disc_tu);
5188
5189 return 0;
5190 }
5191
5192
p2p_dbg(struct p2p_data * p2p,const char * fmt,...)5193 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
5194 {
5195 va_list ap;
5196 char buf[500];
5197
5198 if (!p2p->cfg->debug_print)
5199 return;
5200
5201 va_start(ap, fmt);
5202 vsnprintf(buf, sizeof(buf), fmt, ap);
5203 buf[sizeof(buf) - 1] = '\0';
5204 va_end(ap);
5205 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
5206 }
5207
5208
p2p_info(struct p2p_data * p2p,const char * fmt,...)5209 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
5210 {
5211 va_list ap;
5212 char buf[500];
5213
5214 if (!p2p->cfg->debug_print)
5215 return;
5216
5217 va_start(ap, fmt);
5218 vsnprintf(buf, sizeof(buf), fmt, ap);
5219 buf[sizeof(buf) - 1] = '\0';
5220 va_end(ap);
5221 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
5222 }
5223
5224
p2p_err(struct p2p_data * p2p,const char * fmt,...)5225 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
5226 {
5227 va_list ap;
5228 char buf[500];
5229
5230 if (!p2p->cfg->debug_print)
5231 return;
5232
5233 va_start(ap, fmt);
5234 vsnprintf(buf, sizeof(buf), fmt, ap);
5235 buf[sizeof(buf) - 1] = '\0';
5236 va_end(ap);
5237 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
5238 }
5239
5240
p2p_loop_on_known_peers(struct p2p_data * p2p,void (* peer_callback)(struct p2p_peer_info * peer,void * user_data),void * user_data)5241 void p2p_loop_on_known_peers(struct p2p_data *p2p,
5242 void (*peer_callback)(struct p2p_peer_info *peer,
5243 void *user_data),
5244 void *user_data)
5245 {
5246 struct p2p_device *dev, *n;
5247
5248 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
5249 peer_callback(&dev->info, user_data);
5250 }
5251 }
5252
5253
5254 #ifdef CONFIG_WPS_NFC
5255
p2p_build_nfc_handover(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5256 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
5257 int client_freq,
5258 const u8 *go_dev_addr,
5259 const u8 *ssid, size_t ssid_len)
5260 {
5261 struct wpabuf *buf;
5262 u8 op_class, channel;
5263 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
5264
5265 buf = wpabuf_alloc(1000);
5266 if (buf == NULL)
5267 return NULL;
5268
5269 op_class = p2p->cfg->reg_class;
5270 channel = p2p->cfg->channel;
5271
5272 p2p_buf_add_capability(buf, p2p->dev_capab &
5273 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
5274 p2p_buf_add_device_info(buf, p2p, NULL);
5275
5276 if (p2p->num_groups > 0) {
5277 int freq = p2p_group_get_freq(p2p->groups[0]);
5278 role = P2P_GO_IN_A_GROUP;
5279 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
5280 p2p_dbg(p2p,
5281 "Unknown GO operating frequency %d MHz for NFC handover",
5282 freq);
5283 wpabuf_free(buf);
5284 return NULL;
5285 }
5286 } else if (client_freq > 0) {
5287 role = P2P_CLIENT_IN_A_GROUP;
5288 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
5289 p2p_dbg(p2p,
5290 "Unknown client operating frequency %d MHz for NFC handover",
5291 client_freq);
5292 wpabuf_free(buf);
5293 return NULL;
5294 }
5295 }
5296
5297 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
5298 channel, role);
5299
5300 if (p2p->num_groups > 0) {
5301 /* Limit number of clients to avoid very long message */
5302 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
5303 p2p_group_buf_add_id(p2p->groups[0], buf);
5304 } else if (client_freq > 0 &&
5305 go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
5306 ssid && ssid_len > 0) {
5307 /*
5308 * Add the optional P2P Group ID to indicate in which group this
5309 * device is a P2P Client.
5310 */
5311 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
5312 }
5313
5314 return buf;
5315 }
5316
5317
p2p_build_nfc_handover_req(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5318 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
5319 int client_freq,
5320 const u8 *go_dev_addr,
5321 const u8 *ssid, size_t ssid_len)
5322 {
5323 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5324 ssid_len);
5325 }
5326
5327
p2p_build_nfc_handover_sel(struct p2p_data * p2p,int client_freq,const u8 * go_dev_addr,const u8 * ssid,size_t ssid_len)5328 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
5329 int client_freq,
5330 const u8 *go_dev_addr,
5331 const u8 *ssid, size_t ssid_len)
5332 {
5333 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5334 ssid_len);
5335 }
5336
5337
p2p_process_nfc_connection_handover(struct p2p_data * p2p,struct p2p_nfc_params * params)5338 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
5339 struct p2p_nfc_params *params)
5340 {
5341 struct p2p_message msg;
5342 struct p2p_device *dev;
5343 const u8 *p2p_dev_addr;
5344 int freq;
5345 enum p2p_role_indication role;
5346
5347 params->next_step = NO_ACTION;
5348
5349 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
5350 params->p2p_attr, params->p2p_len, &msg)) {
5351 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
5352 p2p_parse_free(&msg);
5353 return -1;
5354 }
5355
5356 if (msg.p2p_device_addr)
5357 p2p_dev_addr = msg.p2p_device_addr;
5358 else if (msg.device_id)
5359 p2p_dev_addr = msg.device_id;
5360 else {
5361 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
5362 p2p_parse_free(&msg);
5363 return -1;
5364 }
5365
5366 if (msg.oob_dev_password) {
5367 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
5368 msg.oob_dev_password_len);
5369 params->oob_dev_pw_len = msg.oob_dev_password_len;
5370 }
5371
5372 dev = p2p_create_device(p2p, p2p_dev_addr);
5373 if (dev == NULL) {
5374 p2p_parse_free(&msg);
5375 return -1;
5376 }
5377
5378 params->peer = &dev->info;
5379
5380 os_get_reltime(&dev->last_seen);
5381 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
5382 p2p_copy_wps_info(p2p, dev, 0, &msg);
5383
5384 if (!msg.oob_go_neg_channel) {
5385 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
5386 p2p_parse_free(&msg);
5387 return -1;
5388 }
5389
5390 if (msg.oob_go_neg_channel[3] == 0 &&
5391 msg.oob_go_neg_channel[4] == 0)
5392 freq = 0;
5393 else
5394 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
5395 msg.oob_go_neg_channel[4]);
5396 if (freq < 0) {
5397 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
5398 p2p_parse_free(&msg);
5399 return -1;
5400 }
5401 role = msg.oob_go_neg_channel[5];
5402
5403 if (role == P2P_GO_IN_A_GROUP) {
5404 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
5405 params->go_freq = freq;
5406 } else if (role == P2P_CLIENT_IN_A_GROUP) {
5407 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
5408 freq);
5409 params->go_freq = freq;
5410 } else
5411 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
5412 dev->oob_go_neg_freq = freq;
5413
5414 if (!params->sel && role != P2P_GO_IN_A_GROUP) {
5415 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
5416 p2p->cfg->channel);
5417 if (freq < 0) {
5418 p2p_dbg(p2p, "Own listen channel not known");
5419 p2p_parse_free(&msg);
5420 return -1;
5421 }
5422 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
5423 dev->oob_go_neg_freq = freq;
5424 }
5425
5426 if (msg.group_id) {
5427 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
5428 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
5429 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
5430 params->go_ssid_len);
5431 }
5432
5433 if (dev->flags & P2P_DEV_USER_REJECTED) {
5434 p2p_dbg(p2p, "Do not report rejected device");
5435 p2p_parse_free(&msg);
5436 return 0;
5437 }
5438
5439 if (!(dev->flags & P2P_DEV_REPORTED)) {
5440 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
5441 !(dev->flags & P2P_DEV_REPORTED_ONCE));
5442 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
5443 }
5444 p2p_parse_free(&msg);
5445
5446 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
5447 params->next_step = BOTH_GO;
5448 else if (role == P2P_GO_IN_A_GROUP)
5449 params->next_step = JOIN_GROUP;
5450 else if (role == P2P_CLIENT_IN_A_GROUP) {
5451 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
5452 params->next_step = PEER_CLIENT;
5453 } else if (p2p->num_groups > 0)
5454 params->next_step = AUTH_JOIN;
5455 else if (params->sel)
5456 params->next_step = INIT_GO_NEG;
5457 else
5458 params->next_step = RESP_GO_NEG;
5459
5460 return 0;
5461 }
5462
5463
p2p_set_authorized_oob_dev_pw_id(struct p2p_data * p2p,u16 dev_pw_id,int go_intent,const u8 * own_interface_addr)5464 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
5465 int go_intent,
5466 const u8 *own_interface_addr)
5467 {
5468
5469 p2p->authorized_oob_dev_pw_id = dev_pw_id;
5470 if (dev_pw_id == 0) {
5471 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
5472 return;
5473 }
5474
5475 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
5476 dev_pw_id);
5477
5478 p2p->go_intent = go_intent;
5479 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
5480 }
5481
5482 #endif /* CONFIG_WPS_NFC */
5483
5484
p2p_set_passphrase_len(struct p2p_data * p2p,unsigned int len)5485 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
5486 {
5487 if (len < 8 || len > 63)
5488 return -1;
5489 p2p->cfg->passphrase_len = len;
5490 return 0;
5491 }
5492
5493
p2p_set_vendor_elems(struct p2p_data * p2p,struct wpabuf ** vendor_elem)5494 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
5495 {
5496 p2p->vendor_elem = vendor_elem;
5497 }
5498
5499
p2p_go_neg_wait_timeout(void * eloop_ctx,void * timeout_ctx)5500 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
5501 {
5502 struct p2p_data *p2p = eloop_ctx;
5503
5504 p2p_dbg(p2p,
5505 "Timeout on waiting peer to become ready for GO Negotiation");
5506 p2p_go_neg_failed(p2p, -1);
5507 }
5508
5509
p2p_set_own_pref_freq_list(struct p2p_data * p2p,const unsigned int * pref_freq_list,unsigned int size)5510 void p2p_set_own_pref_freq_list(struct p2p_data *p2p,
5511 const unsigned int *pref_freq_list,
5512 unsigned int size)
5513 {
5514 unsigned int i;
5515
5516 if (size > P2P_MAX_PREF_CHANNELS)
5517 size = P2P_MAX_PREF_CHANNELS;
5518 p2p->num_pref_freq = size;
5519 for (i = 0; i < size; i++) {
5520 p2p->pref_freq_list[i] = pref_freq_list[i];
5521 p2p_dbg(p2p, "Own preferred frequency list[%u]=%u MHz",
5522 i, p2p->pref_freq_list[i]);
5523 }
5524 }
5525
5526
p2p_set_override_pref_op_chan(struct p2p_data * p2p,u8 op_class,u8 chan)5527 void p2p_set_override_pref_op_chan(struct p2p_data *p2p, u8 op_class,
5528 u8 chan)
5529 {
5530 p2p->override_pref_op_class = op_class;
5531 p2p->override_pref_channel = chan;
5532 }
5533
5534
p2p_build_probe_resp_template(struct p2p_data * p2p,unsigned int freq)5535 struct wpabuf * p2p_build_probe_resp_template(struct p2p_data *p2p,
5536 unsigned int freq)
5537 {
5538 struct wpabuf *ies, *buf;
5539 u8 addr[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
5540 int ret;
5541
5542 ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
5543 if (!ies) {
5544 wpa_printf(MSG_ERROR,
5545 "CTRL: Failed to build Probe Response IEs");
5546 return NULL;
5547 }
5548
5549 buf = wpabuf_alloc(200 + wpabuf_len(ies));
5550 if (!buf) {
5551 wpabuf_free(ies);
5552 return NULL;
5553 }
5554
5555 ret = p2p_build_probe_resp_buf(p2p, buf, ies, addr, freq);
5556 wpabuf_free(ies);
5557 if (ret) {
5558 wpabuf_free(buf);
5559 return NULL;
5560 }
5561
5562 return buf;
5563 }
5564