1 /*
2 * Wi-Fi Direct - P2P provision discovery
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 "common/ieee802_11_defs.h"
13 #include "common/wpa_ctrl.h"
14 #include "wps/wps_defs.h"
15 #include "p2p_i.h"
16 #include "p2p.h"
17
18
19 /*
20 * Number of retries to attempt for provision discovery requests
21 * in case the peer is not listening.
22 */
23 #define MAX_PROV_DISC_REQ_RETRIES 120
24
25
p2p_build_wps_ie_config_methods(struct wpabuf * buf,u16 config_methods)26 static void p2p_build_wps_ie_config_methods(struct wpabuf *buf,
27 u16 config_methods)
28 {
29 u8 *len;
30 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
31 len = wpabuf_put(buf, 1);
32 wpabuf_put_be32(buf, WPS_DEV_OUI_WFA);
33
34 /* Config Methods */
35 wpabuf_put_be16(buf, ATTR_CONFIG_METHODS);
36 wpabuf_put_be16(buf, 2);
37 wpabuf_put_be16(buf, config_methods);
38
39 p2p_buf_update_ie_hdr(buf, len);
40 }
41
42
p2ps_add_new_group_info(struct p2p_data * p2p,struct p2p_device * dev,struct wpabuf * buf)43 static void p2ps_add_new_group_info(struct p2p_data *p2p,
44 struct p2p_device *dev,
45 struct wpabuf *buf)
46 {
47 int found;
48 u8 intended_addr[ETH_ALEN];
49 u8 ssid[SSID_MAX_LEN];
50 size_t ssid_len;
51 int group_iface;
52 unsigned int force_freq;
53
54 if (!p2p->cfg->get_go_info)
55 return;
56
57 found = p2p->cfg->get_go_info(
58 p2p->cfg->cb_ctx, intended_addr, ssid,
59 &ssid_len, &group_iface, &force_freq);
60 if (found) {
61 if (force_freq > 0) {
62 p2p->p2ps_prov->force_freq = force_freq;
63 p2p->p2ps_prov->pref_freq = 0;
64
65 if (dev)
66 p2p_prepare_channel(p2p, dev, force_freq, 0, 0);
67 }
68 p2p_buf_add_group_id(buf, p2p->cfg->dev_addr,
69 ssid, ssid_len);
70
71 if (group_iface)
72 p2p_buf_add_intended_addr(buf, p2p->intended_addr);
73 else
74 p2p_buf_add_intended_addr(buf, intended_addr);
75 } else {
76 if (!p2p->ssid_set) {
77 p2p_build_ssid(p2p, p2p->ssid, &p2p->ssid_len);
78 p2p->ssid_set = 1;
79 }
80
81 /* Add pre-composed P2P Group ID */
82 p2p_buf_add_group_id(buf, p2p->cfg->dev_addr,
83 p2p->ssid, p2p->ssid_len);
84
85 if (group_iface)
86 p2p_buf_add_intended_addr(
87 buf, p2p->intended_addr);
88 else
89 p2p_buf_add_intended_addr(
90 buf, p2p->cfg->dev_addr);
91 }
92 }
93
94
p2ps_add_pd_req_attrs(struct p2p_data * p2p,struct p2p_device * dev,struct wpabuf * buf,u16 config_methods)95 static void p2ps_add_pd_req_attrs(struct p2p_data *p2p, struct p2p_device *dev,
96 struct wpabuf *buf, u16 config_methods)
97 {
98 struct p2ps_provision *prov = p2p->p2ps_prov;
99 struct p2ps_feature_capab fcap = { prov->cpt_mask, 0 };
100 int shared_group = 0;
101 u8 ssid[SSID_MAX_LEN];
102 size_t ssid_len;
103 u8 go_dev_addr[ETH_ALEN];
104 u8 intended_addr[ETH_ALEN];
105 int follow_on_req_fail = prov->status >= 0 &&
106 prov->status != P2P_SC_SUCCESS_DEFERRED;
107
108 /* If we might be explicite group owner, add GO details */
109 if (!follow_on_req_fail &&
110 (prov->conncap & (P2PS_SETUP_GROUP_OWNER | P2PS_SETUP_NEW)))
111 p2ps_add_new_group_info(p2p, dev, buf);
112
113 if (prov->status >= 0)
114 p2p_buf_add_status(buf, (u8) prov->status);
115 else
116 prov->method = config_methods;
117
118 if (!follow_on_req_fail) {
119 if (p2p->cfg->get_persistent_group) {
120 shared_group = p2p->cfg->get_persistent_group(
121 p2p->cfg->cb_ctx, dev->info.p2p_device_addr,
122 NULL, 0, go_dev_addr, ssid, &ssid_len,
123 intended_addr);
124 }
125
126 if (shared_group ||
127 (prov->conncap & (P2PS_SETUP_CLIENT | P2PS_SETUP_NEW)))
128 p2p_buf_add_channel_list(buf, p2p->cfg->country,
129 &p2p->channels);
130
131 if ((shared_group && !is_zero_ether_addr(intended_addr)) ||
132 (prov->conncap & (P2PS_SETUP_GROUP_OWNER | P2PS_SETUP_NEW)))
133 p2p_buf_add_operating_channel(buf, p2p->cfg->country,
134 p2p->op_reg_class,
135 p2p->op_channel);
136 }
137
138 if (prov->status < 0 && prov->info[0])
139 p2p_buf_add_session_info(buf, prov->info);
140
141 if (!follow_on_req_fail)
142 p2p_buf_add_connection_capability(buf, prov->conncap);
143
144 p2p_buf_add_advertisement_id(buf, prov->adv_id, prov->adv_mac);
145
146 if (!follow_on_req_fail) {
147 if (shared_group || prov->conncap == P2PS_SETUP_NEW ||
148 prov->conncap ==
149 (P2PS_SETUP_GROUP_OWNER | P2PS_SETUP_NEW) ||
150 prov->conncap ==
151 (P2PS_SETUP_GROUP_OWNER | P2PS_SETUP_CLIENT)) {
152 /* Add Config Timeout */
153 p2p_buf_add_config_timeout(buf, p2p->go_timeout,
154 p2p->client_timeout);
155 }
156
157 p2p_buf_add_listen_channel(buf, p2p->cfg->country,
158 p2p->cfg->reg_class,
159 p2p->cfg->channel);
160 }
161
162 p2p_buf_add_session_id(buf, prov->session_id, prov->session_mac);
163
164 p2p_buf_add_feature_capability(buf, sizeof(fcap), (const u8 *) &fcap);
165
166 if (shared_group) {
167 p2p_buf_add_persistent_group_info(buf, go_dev_addr,
168 ssid, ssid_len);
169 /* Add intended interface address if it is not added yet */
170 if ((prov->conncap == P2PS_SETUP_NONE ||
171 prov->conncap == P2PS_SETUP_CLIENT) &&
172 !is_zero_ether_addr(intended_addr))
173 p2p_buf_add_intended_addr(buf, intended_addr);
174 }
175 }
176
177
p2p_build_prov_disc_req(struct p2p_data * p2p,struct p2p_device * dev,int join)178 static struct wpabuf * p2p_build_prov_disc_req(struct p2p_data *p2p,
179 struct p2p_device *dev,
180 int join)
181 {
182 struct wpabuf *buf;
183 u8 *len;
184 size_t extra = 0;
185 u8 dialog_token = dev->dialog_token;
186 u16 config_methods = dev->req_config_methods;
187 struct p2p_device *go = join ? dev : NULL;
188 u8 group_capab;
189
190 #ifdef CONFIG_WIFI_DISPLAY
191 if (p2p->wfd_ie_prov_disc_req)
192 extra = wpabuf_len(p2p->wfd_ie_prov_disc_req);
193 #endif /* CONFIG_WIFI_DISPLAY */
194
195 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_PD_REQ])
196 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_PD_REQ]);
197
198 if (p2p->p2ps_prov)
199 extra += os_strlen(p2p->p2ps_prov->info) + 1 +
200 sizeof(struct p2ps_provision);
201
202 buf = wpabuf_alloc(1000 + extra);
203 if (buf == NULL)
204 return NULL;
205
206 p2p_buf_add_public_action_hdr(buf, P2P_PROV_DISC_REQ, dialog_token);
207
208 len = p2p_buf_add_ie_hdr(buf);
209
210 group_capab = 0;
211 if (p2p->p2ps_prov) {
212 group_capab |= P2P_GROUP_CAPAB_PERSISTENT_GROUP;
213 group_capab |= P2P_GROUP_CAPAB_PERSISTENT_RECONN;
214 if (p2p->cross_connect)
215 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
216 if (p2p->cfg->p2p_intra_bss)
217 group_capab |= P2P_GROUP_CAPAB_INTRA_BSS_DIST;
218 }
219 p2p_buf_add_capability(buf, p2p->dev_capab &
220 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY,
221 group_capab);
222 p2p_buf_add_device_info(buf, p2p, NULL);
223 if (p2p->p2ps_prov) {
224 p2ps_add_pd_req_attrs(p2p, dev, buf, config_methods);
225 } else if (go) {
226 p2p_buf_add_group_id(buf, go->info.p2p_device_addr,
227 go->oper_ssid, go->oper_ssid_len);
228 }
229 p2p_buf_update_ie_hdr(buf, len);
230
231 /* WPS IE with Config Methods attribute */
232 p2p_build_wps_ie_config_methods(buf, config_methods);
233
234 #ifdef CONFIG_WIFI_DISPLAY
235 if (p2p->wfd_ie_prov_disc_req)
236 wpabuf_put_buf(buf, p2p->wfd_ie_prov_disc_req);
237 #endif /* CONFIG_WIFI_DISPLAY */
238
239 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_PD_REQ])
240 wpabuf_put_buf(buf, p2p->vendor_elem[VENDOR_ELEM_P2P_PD_REQ]);
241
242 return buf;
243 }
244
245
p2p_build_prov_disc_resp(struct p2p_data * p2p,struct p2p_device * dev,u8 dialog_token,enum p2p_status_code status,u16 config_methods,u32 adv_id,const u8 * group_id,size_t group_id_len,const u8 * persist_ssid,size_t persist_ssid_len,const u8 * fcap,u16 fcap_len)246 static struct wpabuf * p2p_build_prov_disc_resp(struct p2p_data *p2p,
247 struct p2p_device *dev,
248 u8 dialog_token,
249 enum p2p_status_code status,
250 u16 config_methods,
251 u32 adv_id,
252 const u8 *group_id,
253 size_t group_id_len,
254 const u8 *persist_ssid,
255 size_t persist_ssid_len,
256 const u8 *fcap,
257 u16 fcap_len)
258 {
259 struct wpabuf *buf;
260 size_t extra = 0;
261 int persist = 0;
262
263 #ifdef CONFIG_WIFI_DISPLAY
264 struct wpabuf *wfd_ie = p2p->wfd_ie_prov_disc_resp;
265 if (wfd_ie && group_id) {
266 size_t i;
267 for (i = 0; i < p2p->num_groups; i++) {
268 struct p2p_group *g = p2p->groups[i];
269 struct wpabuf *ie;
270 if (!p2p_group_is_group_id_match(g, group_id,
271 group_id_len))
272 continue;
273 ie = p2p_group_get_wfd_ie(g);
274 if (ie) {
275 wfd_ie = ie;
276 break;
277 }
278 }
279 }
280 if (wfd_ie)
281 extra = wpabuf_len(wfd_ie);
282 #endif /* CONFIG_WIFI_DISPLAY */
283
284 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_PD_RESP])
285 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_PD_RESP]);
286
287 buf = wpabuf_alloc(1000 + extra);
288 if (buf == NULL)
289 return NULL;
290
291 p2p_buf_add_public_action_hdr(buf, P2P_PROV_DISC_RESP, dialog_token);
292
293 /* Add P2P IE for P2PS */
294 if (p2p->p2ps_prov && p2p->p2ps_prov->adv_id == adv_id) {
295 u8 *len = p2p_buf_add_ie_hdr(buf);
296 struct p2ps_provision *prov = p2p->p2ps_prov;
297 u8 group_capab;
298 u8 conncap = 0;
299
300 if (status == P2P_SC_SUCCESS ||
301 status == P2P_SC_SUCCESS_DEFERRED)
302 conncap = prov->conncap;
303
304 if (!status && prov->status != -1)
305 status = prov->status;
306
307 p2p_buf_add_status(buf, status);
308 group_capab = P2P_GROUP_CAPAB_PERSISTENT_GROUP |
309 P2P_GROUP_CAPAB_PERSISTENT_RECONN;
310 if (p2p->cross_connect)
311 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
312 if (p2p->cfg->p2p_intra_bss)
313 group_capab |= P2P_GROUP_CAPAB_INTRA_BSS_DIST;
314 p2p_buf_add_capability(buf, p2p->dev_capab &
315 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY,
316 group_capab);
317 p2p_buf_add_device_info(buf, p2p, NULL);
318
319 if (persist_ssid && p2p->cfg->get_persistent_group && dev &&
320 (status == P2P_SC_SUCCESS ||
321 status == P2P_SC_SUCCESS_DEFERRED)) {
322 u8 ssid[SSID_MAX_LEN];
323 size_t ssid_len;
324 u8 go_dev_addr[ETH_ALEN];
325 u8 intended_addr[ETH_ALEN];
326
327 persist = p2p->cfg->get_persistent_group(
328 p2p->cfg->cb_ctx,
329 dev->info.p2p_device_addr,
330 persist_ssid, persist_ssid_len, go_dev_addr,
331 ssid, &ssid_len, intended_addr);
332 if (persist) {
333 p2p_buf_add_persistent_group_info(
334 buf, go_dev_addr, ssid, ssid_len);
335 if (!is_zero_ether_addr(intended_addr))
336 p2p_buf_add_intended_addr(
337 buf, intended_addr);
338 }
339 }
340
341 if (!persist && (conncap & P2PS_SETUP_GROUP_OWNER))
342 p2ps_add_new_group_info(p2p, dev, buf);
343
344 /* Add Operating Channel if conncap indicates GO */
345 if (persist || (conncap & P2PS_SETUP_GROUP_OWNER)) {
346 if (p2p->op_reg_class && p2p->op_channel)
347 p2p_buf_add_operating_channel(
348 buf, p2p->cfg->country,
349 p2p->op_reg_class,
350 p2p->op_channel);
351 else
352 p2p_buf_add_operating_channel(
353 buf, p2p->cfg->country,
354 p2p->cfg->op_reg_class,
355 p2p->cfg->op_channel);
356 }
357
358 if (persist ||
359 (conncap & (P2PS_SETUP_CLIENT | P2PS_SETUP_GROUP_OWNER)))
360 p2p_buf_add_channel_list(buf, p2p->cfg->country,
361 &p2p->channels);
362
363 if (!persist && conncap)
364 p2p_buf_add_connection_capability(buf, conncap);
365
366 p2p_buf_add_advertisement_id(buf, adv_id, prov->adv_mac);
367
368 if (persist ||
369 (conncap & (P2PS_SETUP_CLIENT | P2PS_SETUP_GROUP_OWNER)))
370 p2p_buf_add_config_timeout(buf, p2p->go_timeout,
371 p2p->client_timeout);
372
373 p2p_buf_add_session_id(buf, prov->session_id,
374 prov->session_mac);
375
376 p2p_buf_add_feature_capability(buf, fcap_len, fcap);
377 p2p_buf_update_ie_hdr(buf, len);
378 } else if (status != P2P_SC_SUCCESS || adv_id) {
379 u8 *len = p2p_buf_add_ie_hdr(buf);
380
381 p2p_buf_add_status(buf, status);
382
383 if (p2p->p2ps_prov)
384 p2p_buf_add_advertisement_id(buf, adv_id,
385 p2p->p2ps_prov->adv_mac);
386
387 p2p_buf_update_ie_hdr(buf, len);
388 }
389
390 /* WPS IE with Config Methods attribute */
391 p2p_build_wps_ie_config_methods(buf, config_methods);
392
393 #ifdef CONFIG_WIFI_DISPLAY
394 if (wfd_ie)
395 wpabuf_put_buf(buf, wfd_ie);
396 #endif /* CONFIG_WIFI_DISPLAY */
397
398 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_PD_RESP])
399 wpabuf_put_buf(buf, p2p->vendor_elem[VENDOR_ELEM_P2P_PD_RESP]);
400
401 return buf;
402 }
403
404
p2ps_setup_p2ps_prov(struct p2p_data * p2p,u32 adv_id,u32 session_id,u16 method,const u8 * session_mac,const u8 * adv_mac)405 static int p2ps_setup_p2ps_prov(struct p2p_data *p2p, u32 adv_id,
406 u32 session_id, u16 method,
407 const u8 *session_mac, const u8 *adv_mac)
408 {
409 struct p2ps_provision *tmp;
410
411 if (!p2p->p2ps_prov) {
412 p2p->p2ps_prov = os_zalloc(sizeof(struct p2ps_provision) + 1);
413 if (!p2p->p2ps_prov)
414 return -1;
415 } else {
416 os_memset(p2p->p2ps_prov, 0, sizeof(struct p2ps_provision) + 1);
417 }
418
419 tmp = p2p->p2ps_prov;
420 tmp->adv_id = adv_id;
421 tmp->session_id = session_id;
422 tmp->method = method;
423 os_memcpy(tmp->session_mac, session_mac, ETH_ALEN);
424 os_memcpy(tmp->adv_mac, adv_mac, ETH_ALEN);
425 tmp->info[0] = '\0';
426
427 return 0;
428 }
429
430
p2ps_own_preferred_cpt(const u8 * cpt_priority,u8 req_cpt_mask)431 static u8 p2ps_own_preferred_cpt(const u8 *cpt_priority, u8 req_cpt_mask)
432 {
433 int i;
434
435 for (i = 0; cpt_priority[i]; i++)
436 if (req_cpt_mask & cpt_priority[i])
437 return cpt_priority[i];
438
439 return 0;
440 }
441
442
443 /* Check if the message contains a valid P2PS PD Request */
p2ps_validate_pd_req(struct p2p_data * p2p,struct p2p_message * msg,const u8 * addr)444 static int p2ps_validate_pd_req(struct p2p_data *p2p, struct p2p_message *msg,
445 const u8 *addr)
446 {
447 u8 group_id = 0;
448 u8 intended_addr = 0;
449 u8 operating_channel = 0;
450 u8 channel_list = 0;
451 u8 config_timeout = 0;
452 u8 listen_channel = 0;
453
454 #define P2PS_PD_REQ_CHECK(_val, _attr) \
455 do { \
456 if ((_val) && !msg->_attr) { \
457 p2p_dbg(p2p, "Not P2PS PD Request. Missing %s", #_attr); \
458 return -1; \
459 } \
460 } while (0)
461
462 P2PS_PD_REQ_CHECK(1, adv_id);
463 P2PS_PD_REQ_CHECK(1, session_id);
464 P2PS_PD_REQ_CHECK(1, session_mac);
465 P2PS_PD_REQ_CHECK(1, adv_mac);
466 P2PS_PD_REQ_CHECK(1, capability);
467 P2PS_PD_REQ_CHECK(1, p2p_device_info);
468 P2PS_PD_REQ_CHECK(1, feature_cap);
469
470 /*
471 * We don't need to check Connection Capability, Persistent Group,
472 * and related attributes for follow-on PD Request with a status
473 * other than SUCCESS_DEFERRED.
474 */
475 if (msg->status && *msg->status != P2P_SC_SUCCESS_DEFERRED)
476 return 0;
477
478 P2PS_PD_REQ_CHECK(1, conn_cap);
479
480 /*
481 * Note 1: A feature capability attribute structure can be changed
482 * in the future. The assumption is that such modifications are
483 * backward compatible, therefore we allow processing of msg.feature_cap
484 * exceeding the size of the p2ps_feature_capab structure.
485 * Note 2: Verification of msg.feature_cap_len below has to be changed
486 * to allow 2 byte feature capability processing if
487 * struct p2ps_feature_capab is extended to include additional fields
488 * and it affects the structure size.
489 */
490 if (msg->feature_cap_len < sizeof(struct p2ps_feature_capab)) {
491 p2p_dbg(p2p, "P2PS: Invalid feature capability len");
492 return -1;
493 }
494
495 switch (*msg->conn_cap) {
496 case P2PS_SETUP_NEW:
497 group_id = 1;
498 intended_addr = 1;
499 operating_channel = 1;
500 channel_list = 1;
501 config_timeout = 1;
502 listen_channel = 1;
503 break;
504 case P2PS_SETUP_CLIENT:
505 channel_list = 1;
506 listen_channel = 1;
507 break;
508 case P2PS_SETUP_GROUP_OWNER:
509 group_id = 1;
510 intended_addr = 1;
511 operating_channel = 1;
512 break;
513 case P2PS_SETUP_NEW | P2PS_SETUP_GROUP_OWNER:
514 group_id = 1;
515 operating_channel = 1;
516 intended_addr = 1;
517 channel_list = 1;
518 config_timeout = 1;
519 break;
520 case P2PS_SETUP_CLIENT | P2PS_SETUP_GROUP_OWNER:
521 group_id = 1;
522 intended_addr = 1;
523 operating_channel = 1;
524 channel_list = 1;
525 config_timeout = 1;
526 break;
527 default:
528 p2p_dbg(p2p, "Invalid P2PS PD connection capability");
529 return -1;
530 }
531
532 if (msg->persistent_dev) {
533 channel_list = 1;
534 config_timeout = 1;
535 if (os_memcmp(msg->persistent_dev, addr, ETH_ALEN) == 0) {
536 intended_addr = 1;
537 operating_channel = 1;
538 }
539 }
540
541 P2PS_PD_REQ_CHECK(group_id, group_id);
542 P2PS_PD_REQ_CHECK(intended_addr, intended_addr);
543 P2PS_PD_REQ_CHECK(operating_channel, operating_channel);
544 P2PS_PD_REQ_CHECK(channel_list, channel_list);
545 P2PS_PD_REQ_CHECK(config_timeout, config_timeout);
546 P2PS_PD_REQ_CHECK(listen_channel, listen_channel);
547
548 #undef P2PS_PD_REQ_CHECK
549
550 return 0;
551 }
552
553
p2p_process_prov_disc_req(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len,int rx_freq)554 void p2p_process_prov_disc_req(struct p2p_data *p2p, const u8 *sa,
555 const u8 *data, size_t len, int rx_freq)
556 {
557 struct p2p_message msg;
558 struct p2p_device *dev;
559 int freq;
560 enum p2p_status_code reject = P2P_SC_FAIL_INCOMPATIBLE_PARAMS;
561 struct wpabuf *resp;
562 u32 adv_id = 0;
563 struct p2ps_advertisement *p2ps_adv = NULL;
564 u8 conncap = P2PS_SETUP_NEW;
565 u8 auto_accept = 0;
566 u32 session_id = 0;
567 u8 session_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
568 u8 adv_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
569 const u8 *group_mac;
570 int passwd_id = DEV_PW_DEFAULT;
571 u16 config_methods;
572 u16 allowed_config_methods = WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
573 struct p2ps_feature_capab resp_fcap = { 0, 0 };
574 struct p2ps_feature_capab *req_fcap = NULL;
575 u8 remote_conncap;
576 u16 method;
577
578 if (p2p_parse(data, len, &msg))
579 return;
580
581 p2p_dbg(p2p, "Received Provision Discovery Request from " MACSTR
582 " with config methods 0x%x (freq=%d)",
583 MAC2STR(sa), msg.wps_config_methods, rx_freq);
584 group_mac = msg.intended_addr;
585
586 dev = p2p_get_device(p2p, sa);
587 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
588 p2p_dbg(p2p, "Provision Discovery Request from unknown peer "
589 MACSTR, MAC2STR(sa));
590
591 if (p2p_add_device(p2p, sa, rx_freq, NULL, 0, data + 1, len - 1,
592 0)) {
593 p2p_dbg(p2p, "Provision Discovery Request add device failed "
594 MACSTR, MAC2STR(sa));
595 goto out;
596 }
597
598 dev = p2p_get_device(p2p, sa);
599 if (!dev) {
600 p2p_dbg(p2p,
601 "Provision Discovery device not found "
602 MACSTR, MAC2STR(sa));
603 goto out;
604 }
605 } else if (msg.wfd_subelems) {
606 wpabuf_free(dev->info.wfd_subelems);
607 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
608 }
609
610 if (!msg.adv_id) {
611 allowed_config_methods |= WPS_CONFIG_PUSHBUTTON;
612 if (!(msg.wps_config_methods & allowed_config_methods)) {
613 p2p_dbg(p2p,
614 "Unsupported Config Methods in Provision Discovery Request");
615 goto out;
616 }
617
618 /* Legacy (non-P2PS) - Unknown groups allowed for P2PS */
619 if (msg.group_id) {
620 size_t i;
621
622 for (i = 0; i < p2p->num_groups; i++) {
623 if (p2p_group_is_group_id_match(
624 p2p->groups[i],
625 msg.group_id, msg.group_id_len))
626 break;
627 }
628 if (i == p2p->num_groups) {
629 p2p_dbg(p2p,
630 "PD request for unknown P2P Group ID - reject");
631 goto out;
632 }
633 }
634 } else {
635 allowed_config_methods |= WPS_CONFIG_P2PS;
636
637 /*
638 * Set adv_id here, so in case of an error, a P2PS PD Response
639 * will be sent.
640 */
641 adv_id = WPA_GET_LE32(msg.adv_id);
642 if (p2ps_validate_pd_req(p2p, &msg, sa) < 0) {
643 reject = P2P_SC_FAIL_INVALID_PARAMS;
644 goto out;
645 }
646
647 req_fcap = (struct p2ps_feature_capab *) msg.feature_cap;
648
649 os_memcpy(session_mac, msg.session_mac, ETH_ALEN);
650 os_memcpy(adv_mac, msg.adv_mac, ETH_ALEN);
651
652 session_id = WPA_GET_LE32(msg.session_id);
653
654 if (msg.conn_cap)
655 conncap = *msg.conn_cap;
656
657 /*
658 * We need to verify a P2PS config methog in an initial PD
659 * request or in a follow-on PD request with the status
660 * SUCCESS_DEFERRED.
661 */
662 if ((!msg.status || *msg.status == P2P_SC_SUCCESS_DEFERRED) &&
663 !(msg.wps_config_methods & allowed_config_methods)) {
664 p2p_dbg(p2p,
665 "Unsupported Config Methods in Provision Discovery Request");
666 goto out;
667 }
668
669 /*
670 * TODO: since we don't support multiple PD, reject PD request
671 * if we are in the middle of P2PS PD with some other peer
672 */
673 }
674
675 dev->flags &= ~(P2P_DEV_PD_PEER_DISPLAY |
676 P2P_DEV_PD_PEER_KEYPAD |
677 P2P_DEV_PD_PEER_P2PS);
678
679 if (msg.wps_config_methods & WPS_CONFIG_DISPLAY) {
680 p2p_dbg(p2p, "Peer " MACSTR
681 " requested us to show a PIN on display", MAC2STR(sa));
682 dev->flags |= P2P_DEV_PD_PEER_KEYPAD;
683 passwd_id = DEV_PW_USER_SPECIFIED;
684 } else if (msg.wps_config_methods & WPS_CONFIG_KEYPAD) {
685 p2p_dbg(p2p, "Peer " MACSTR
686 " requested us to write its PIN using keypad",
687 MAC2STR(sa));
688 dev->flags |= P2P_DEV_PD_PEER_DISPLAY;
689 passwd_id = DEV_PW_REGISTRAR_SPECIFIED;
690 } else if (msg.wps_config_methods & WPS_CONFIG_P2PS) {
691 p2p_dbg(p2p, "Peer " MACSTR " requesting P2PS PIN",
692 MAC2STR(sa));
693 dev->flags |= P2P_DEV_PD_PEER_P2PS;
694 passwd_id = DEV_PW_P2PS_DEFAULT;
695 }
696
697 /* Remove stale persistent groups */
698 if (p2p->cfg->remove_stale_groups) {
699 p2p->cfg->remove_stale_groups(
700 p2p->cfg->cb_ctx, dev->info.p2p_device_addr,
701 msg.persistent_dev,
702 msg.persistent_ssid, msg.persistent_ssid_len);
703 }
704
705 reject = P2P_SC_SUCCESS;
706
707 /*
708 * End of a legacy P2P PD Request processing, from this point continue
709 * with P2PS one.
710 */
711 if (!msg.adv_id)
712 goto out;
713
714 remote_conncap = conncap;
715
716 if (!msg.status) {
717 unsigned int forced_freq, pref_freq;
718
719 if (os_memcmp(p2p->cfg->dev_addr, msg.adv_mac, ETH_ALEN)) {
720 p2p_dbg(p2p,
721 "P2PS PD adv mac does not match the local one");
722 reject = P2P_SC_FAIL_INCOMPATIBLE_PARAMS;
723 goto out;
724 }
725
726 p2ps_adv = p2p_service_p2ps_id(p2p, adv_id);
727 if (!p2ps_adv) {
728 p2p_dbg(p2p, "P2PS PD invalid adv_id=0x%X", adv_id);
729 reject = P2P_SC_FAIL_INCOMPATIBLE_PARAMS;
730 goto out;
731 }
732 p2p_dbg(p2p, "adv_id: 0x%X, p2ps_adv: %p", adv_id, p2ps_adv);
733
734 auto_accept = p2ps_adv->auto_accept;
735 conncap = p2p->cfg->p2ps_group_capability(p2p->cfg->cb_ctx,
736 conncap, auto_accept,
737 &forced_freq,
738 &pref_freq);
739
740 p2p_dbg(p2p, "Conncap: local:%d remote:%d result:%d",
741 auto_accept, remote_conncap, conncap);
742
743 p2p_prepare_channel(p2p, dev, forced_freq, pref_freq, 0);
744
745 resp_fcap.cpt = p2ps_own_preferred_cpt(p2ps_adv->cpt_priority,
746 req_fcap->cpt);
747
748 p2p_dbg(p2p, "cpt: service:0x%x remote:0x%x result:0x%x",
749 p2ps_adv->cpt_mask, req_fcap->cpt, resp_fcap.cpt);
750
751 if (!resp_fcap.cpt) {
752 p2p_dbg(p2p,
753 "Incompatible P2PS feature capability CPT bitmask");
754 reject = P2P_SC_FAIL_INCOMPATIBLE_PARAMS;
755 } else if (p2ps_adv->config_methods &&
756 !(msg.wps_config_methods &
757 p2ps_adv->config_methods)) {
758 p2p_dbg(p2p,
759 "Unsupported config methods in Provision Discovery Request (own=0x%x peer=0x%x)",
760 p2ps_adv->config_methods,
761 msg.wps_config_methods);
762 reject = P2P_SC_FAIL_INCOMPATIBLE_PARAMS;
763 } else if (!p2ps_adv->state) {
764 p2p_dbg(p2p, "P2PS state unavailable");
765 reject = P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE;
766 } else if (!conncap) {
767 p2p_dbg(p2p, "Conncap resolution failed");
768 reject = P2P_SC_FAIL_INCOMPATIBLE_PARAMS;
769 }
770
771 if (msg.wps_config_methods & WPS_CONFIG_KEYPAD) {
772 p2p_dbg(p2p, "Keypad - always defer");
773 auto_accept = 0;
774 }
775
776 if ((remote_conncap & (P2PS_SETUP_NEW | P2PS_SETUP_CLIENT) ||
777 msg.persistent_dev) && conncap != P2PS_SETUP_NEW &&
778 msg.channel_list && msg.channel_list_len &&
779 p2p_peer_channels_check(p2p, &p2p->channels, dev,
780 msg.channel_list,
781 msg.channel_list_len) < 0) {
782 p2p_dbg(p2p,
783 "No common channels - force deferred flow");
784 auto_accept = 0;
785 }
786
787 if (((remote_conncap & P2PS_SETUP_GROUP_OWNER) ||
788 msg.persistent_dev) && msg.operating_channel) {
789 struct p2p_channels intersect;
790
791 /*
792 * There are cases where only the operating channel is
793 * provided. This requires saving the channel as the
794 * supported channel list, and verifying that it is
795 * supported.
796 */
797 if (dev->channels.reg_classes == 0 ||
798 !p2p_channels_includes(&dev->channels,
799 msg.operating_channel[3],
800 msg.operating_channel[4])) {
801 struct p2p_channels *ch = &dev->channels;
802
803 os_memset(ch, 0, sizeof(*ch));
804 ch->reg_class[0].reg_class =
805 msg.operating_channel[3];
806 ch->reg_class[0].channel[0] =
807 msg.operating_channel[4];
808 ch->reg_class[0].channels = 1;
809 ch->reg_classes = 1;
810 }
811
812 p2p_channels_intersect(&p2p->channels, &dev->channels,
813 &intersect);
814
815 if (intersect.reg_classes == 0) {
816 p2p_dbg(p2p,
817 "No common channels - force deferred flow");
818 auto_accept = 0;
819 }
820 }
821
822 if (auto_accept || reject != P2P_SC_SUCCESS) {
823 struct p2ps_provision *tmp;
824
825 if (p2ps_setup_p2ps_prov(p2p, adv_id, session_id,
826 msg.wps_config_methods,
827 session_mac, adv_mac) < 0) {
828 reject = P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE;
829 goto out;
830 }
831
832 tmp = p2p->p2ps_prov;
833 tmp->force_freq = forced_freq;
834 tmp->pref_freq = pref_freq;
835 if (conncap) {
836 tmp->conncap = conncap;
837 tmp->status = P2P_SC_SUCCESS;
838 } else {
839 tmp->conncap = auto_accept;
840 tmp->status = P2P_SC_FAIL_INCOMPATIBLE_PARAMS;
841 }
842
843 if (reject != P2P_SC_SUCCESS)
844 goto out;
845 }
846 }
847
848 if (!msg.status && !auto_accept &&
849 (!p2p->p2ps_prov || p2p->p2ps_prov->adv_id != adv_id)) {
850 struct p2ps_provision *tmp;
851
852 if (!conncap) {
853 reject = P2P_SC_FAIL_INCOMPATIBLE_PARAMS;
854 goto out;
855 }
856
857 if (p2ps_setup_p2ps_prov(p2p, adv_id, session_id,
858 msg.wps_config_methods,
859 session_mac, adv_mac) < 0) {
860 reject = P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE;
861 goto out;
862 }
863 tmp = p2p->p2ps_prov;
864 reject = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
865 tmp->status = reject;
866 }
867
868 /* Not a P2PS Follow-on PD */
869 if (!msg.status)
870 goto out;
871
872 if (*msg.status && *msg.status != P2P_SC_SUCCESS_DEFERRED) {
873 reject = *msg.status;
874 goto out;
875 }
876
877 if (*msg.status != P2P_SC_SUCCESS_DEFERRED || !p2p->p2ps_prov)
878 goto out;
879
880 if (p2p->p2ps_prov->adv_id != adv_id ||
881 os_memcmp(p2p->p2ps_prov->adv_mac, msg.adv_mac, ETH_ALEN)) {
882 p2p_dbg(p2p,
883 "P2PS Follow-on PD with mismatch Advertisement ID/MAC");
884 goto out;
885 }
886
887 if (p2p->p2ps_prov->session_id != session_id ||
888 os_memcmp(p2p->p2ps_prov->session_mac, msg.session_mac, ETH_ALEN)) {
889 p2p_dbg(p2p, "P2PS Follow-on PD with mismatch Session ID/MAC");
890 goto out;
891 }
892
893 method = p2p->p2ps_prov->method;
894
895 conncap = p2p->cfg->p2ps_group_capability(p2p->cfg->cb_ctx,
896 remote_conncap,
897 p2p->p2ps_prov->conncap,
898 &p2p->p2ps_prov->force_freq,
899 &p2p->p2ps_prov->pref_freq);
900
901 resp_fcap.cpt = p2ps_own_preferred_cpt(p2p->p2ps_prov->cpt_priority,
902 req_fcap->cpt);
903
904 p2p_dbg(p2p, "cpt: local:0x%x remote:0x%x result:0x%x",
905 p2p->p2ps_prov->cpt_mask, req_fcap->cpt, resp_fcap.cpt);
906
907 p2p_prepare_channel(p2p, dev, p2p->p2ps_prov->force_freq,
908 p2p->p2ps_prov->pref_freq, 0);
909
910 /*
911 * Ensure that if we asked for PIN originally, our method is consistent
912 * with original request.
913 */
914 if (method & WPS_CONFIG_DISPLAY)
915 method = WPS_CONFIG_KEYPAD;
916 else if (method & WPS_CONFIG_KEYPAD)
917 method = WPS_CONFIG_DISPLAY;
918
919 if (!conncap || !(msg.wps_config_methods & method)) {
920 /*
921 * Reject this "Deferred Accept*
922 * if incompatible conncap or method
923 */
924 reject = P2P_SC_FAIL_INCOMPATIBLE_PARAMS;
925 } else if (!resp_fcap.cpt) {
926 p2p_dbg(p2p,
927 "Incompatible P2PS feature capability CPT bitmask");
928 reject = P2P_SC_FAIL_INCOMPATIBLE_PARAMS;
929 } else if ((remote_conncap & (P2PS_SETUP_NEW | P2PS_SETUP_CLIENT) ||
930 msg.persistent_dev) && conncap != P2PS_SETUP_NEW &&
931 msg.channel_list && msg.channel_list_len &&
932 p2p_peer_channels_check(p2p, &p2p->channels, dev,
933 msg.channel_list,
934 msg.channel_list_len) < 0) {
935 p2p_dbg(p2p,
936 "No common channels in Follow-On Provision Discovery Request");
937 reject = P2P_SC_FAIL_NO_COMMON_CHANNELS;
938 } else {
939 reject = P2P_SC_SUCCESS;
940 }
941
942 dev->oper_freq = 0;
943 if (reject == P2P_SC_SUCCESS || reject == P2P_SC_SUCCESS_DEFERRED) {
944 u8 tmp;
945
946 if (msg.operating_channel)
947 dev->oper_freq =
948 p2p_channel_to_freq(msg.operating_channel[3],
949 msg.operating_channel[4]);
950
951 if ((conncap & P2PS_SETUP_GROUP_OWNER) &&
952 p2p_go_select_channel(p2p, dev, &tmp) < 0)
953 reject = P2P_SC_FAIL_NO_COMMON_CHANNELS;
954 }
955
956 p2p->p2ps_prov->status = reject;
957 p2p->p2ps_prov->conncap = conncap;
958
959 out:
960 if (reject == P2P_SC_SUCCESS ||
961 reject == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
962 config_methods = msg.wps_config_methods;
963 else
964 config_methods = 0;
965
966 /*
967 * Send PD Response for an initial PD Request or for follow-on
968 * PD Request with P2P_SC_SUCCESS_DEFERRED status.
969 */
970 if (!msg.status || *msg.status == P2P_SC_SUCCESS_DEFERRED) {
971 resp = p2p_build_prov_disc_resp(p2p, dev, msg.dialog_token,
972 reject, config_methods, adv_id,
973 msg.group_id, msg.group_id_len,
974 msg.persistent_ssid,
975 msg.persistent_ssid_len,
976 (const u8 *) &resp_fcap,
977 sizeof(resp_fcap));
978 if (!resp) {
979 p2p_parse_free(&msg);
980 return;
981 }
982 p2p_dbg(p2p, "Sending Provision Discovery Response");
983 if (rx_freq > 0)
984 freq = rx_freq;
985 else
986 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
987 p2p->cfg->channel);
988 if (freq < 0) {
989 p2p_dbg(p2p, "Unknown regulatory class/channel");
990 wpabuf_free(resp);
991 p2p_parse_free(&msg);
992 return;
993 }
994 p2p->pending_action_state = P2P_PENDING_PD_RESPONSE;
995 if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr,
996 p2p->cfg->dev_addr,
997 wpabuf_head(resp), wpabuf_len(resp),
998 50) < 0)
999 p2p_dbg(p2p, "Failed to send Action frame");
1000 else
1001 p2p->send_action_in_progress = 1;
1002
1003 wpabuf_free(resp);
1004 }
1005
1006 if (!dev) {
1007 p2p_parse_free(&msg);
1008 return;
1009 }
1010
1011 freq = 0;
1012 if (reject == P2P_SC_SUCCESS && conncap == P2PS_SETUP_GROUP_OWNER) {
1013 freq = p2p_channel_to_freq(p2p->op_reg_class,
1014 p2p->op_channel);
1015 if (freq < 0)
1016 freq = 0;
1017 }
1018
1019 if (!p2p->cfg->p2ps_prov_complete) {
1020 /* Don't emit anything */
1021 } else if (msg.status && *msg.status != P2P_SC_SUCCESS &&
1022 *msg.status != P2P_SC_SUCCESS_DEFERRED) {
1023 reject = *msg.status;
1024 p2p->cfg->p2ps_prov_complete(p2p->cfg->cb_ctx, reject,
1025 sa, adv_mac, session_mac,
1026 NULL, adv_id, session_id,
1027 0, 0, msg.persistent_ssid,
1028 msg.persistent_ssid_len,
1029 0, 0, NULL, NULL, 0, freq,
1030 NULL, 0);
1031 } else if (msg.status && *msg.status == P2P_SC_SUCCESS_DEFERRED &&
1032 p2p->p2ps_prov) {
1033 p2p->p2ps_prov->status = reject;
1034 p2p->p2ps_prov->conncap = conncap;
1035
1036 if (reject != P2P_SC_SUCCESS)
1037 p2p->cfg->p2ps_prov_complete(p2p->cfg->cb_ctx, reject,
1038 sa, adv_mac, session_mac,
1039 NULL, adv_id,
1040 session_id, conncap, 0,
1041 msg.persistent_ssid,
1042 msg.persistent_ssid_len, 0,
1043 0, NULL, NULL, 0, freq,
1044 NULL, 0);
1045 else
1046 p2p->cfg->p2ps_prov_complete(p2p->cfg->cb_ctx,
1047 *msg.status,
1048 sa, adv_mac, session_mac,
1049 group_mac, adv_id,
1050 session_id, conncap,
1051 passwd_id,
1052 msg.persistent_ssid,
1053 msg.persistent_ssid_len, 0,
1054 0, NULL,
1055 (const u8 *) &resp_fcap,
1056 sizeof(resp_fcap), freq,
1057 NULL, 0);
1058 } else if (msg.status && p2p->p2ps_prov) {
1059 p2p->p2ps_prov->status = P2P_SC_SUCCESS;
1060 p2p->cfg->p2ps_prov_complete(p2p->cfg->cb_ctx, *msg.status, sa,
1061 adv_mac, session_mac, group_mac,
1062 adv_id, session_id, conncap,
1063 passwd_id,
1064 msg.persistent_ssid,
1065 msg.persistent_ssid_len,
1066 0, 0, NULL,
1067 (const u8 *) &resp_fcap,
1068 sizeof(resp_fcap), freq, NULL, 0);
1069 } else if (msg.status) {
1070 } else if (auto_accept && reject == P2P_SC_SUCCESS) {
1071 p2p->cfg->p2ps_prov_complete(p2p->cfg->cb_ctx, P2P_SC_SUCCESS,
1072 sa, adv_mac, session_mac,
1073 group_mac, adv_id, session_id,
1074 conncap, passwd_id,
1075 msg.persistent_ssid,
1076 msg.persistent_ssid_len,
1077 0, 0, NULL,
1078 (const u8 *) &resp_fcap,
1079 sizeof(resp_fcap), freq,
1080 msg.group_id ?
1081 msg.group_id + ETH_ALEN : NULL,
1082 msg.group_id ?
1083 msg.group_id_len - ETH_ALEN : 0);
1084 } else if (reject == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE &&
1085 (!msg.session_info || !msg.session_info_len)) {
1086 p2p->p2ps_prov->method = msg.wps_config_methods;
1087
1088 p2p->cfg->p2ps_prov_complete(p2p->cfg->cb_ctx, P2P_SC_SUCCESS,
1089 sa, adv_mac, session_mac,
1090 group_mac, adv_id, session_id,
1091 conncap, passwd_id,
1092 msg.persistent_ssid,
1093 msg.persistent_ssid_len,
1094 0, 1, NULL,
1095 (const u8 *) &resp_fcap,
1096 sizeof(resp_fcap), freq, NULL, 0);
1097 } else if (reject == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) {
1098 size_t buf_len = msg.session_info_len;
1099 char *buf = os_malloc(2 * buf_len + 1);
1100
1101 if (buf) {
1102 p2p->p2ps_prov->method = msg.wps_config_methods;
1103
1104 utf8_escape((char *) msg.session_info, buf_len,
1105 buf, 2 * buf_len + 1);
1106
1107 p2p->cfg->p2ps_prov_complete(
1108 p2p->cfg->cb_ctx, P2P_SC_SUCCESS, sa,
1109 adv_mac, session_mac, group_mac, adv_id,
1110 session_id, conncap, passwd_id,
1111 msg.persistent_ssid, msg.persistent_ssid_len,
1112 0, 1, buf,
1113 (const u8 *) &resp_fcap, sizeof(resp_fcap),
1114 freq, NULL, 0);
1115
1116 os_free(buf);
1117 }
1118 }
1119
1120 /*
1121 * prov_disc_req callback is used to generate P2P-PROV-DISC-ENTER-PIN,
1122 * P2P-PROV-DISC-SHOW-PIN, and P2P-PROV-DISC-PBC-REQ events.
1123 * Call it either on legacy P2P PD or on P2PS PD only if we need to
1124 * enter/show PIN.
1125 *
1126 * The callback is called in the following cases:
1127 * 1. Legacy P2P PD request, response status SUCCESS
1128 * 2. P2PS advertiser, method: DISPLAY, autoaccept: TRUE,
1129 * response status: SUCCESS
1130 * 3. P2PS advertiser, method DISPLAY, autoaccept: FALSE,
1131 * response status: INFO_CURRENTLY_UNAVAILABLE
1132 * 4. P2PS advertiser, method: KEYPAD, autoaccept==any,
1133 * response status: INFO_CURRENTLY_UNAVAILABLE
1134 * 5. P2PS follow-on with SUCCESS_DEFERRED,
1135 * advertiser role: DISPLAY, autoaccept: FALSE,
1136 * seeker: KEYPAD, response status: SUCCESS
1137 */
1138 if (p2p->cfg->prov_disc_req &&
1139 ((reject == P2P_SC_SUCCESS && !msg.adv_id) ||
1140 (!msg.status &&
1141 (reject == P2P_SC_SUCCESS ||
1142 reject == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) &&
1143 passwd_id == DEV_PW_USER_SPECIFIED) ||
1144 (!msg.status &&
1145 reject == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE &&
1146 passwd_id == DEV_PW_REGISTRAR_SPECIFIED) ||
1147 (reject == P2P_SC_SUCCESS &&
1148 msg.status && *msg.status == P2P_SC_SUCCESS_DEFERRED &&
1149 passwd_id == DEV_PW_REGISTRAR_SPECIFIED))) {
1150 const u8 *dev_addr = sa;
1151
1152 if (msg.p2p_device_addr)
1153 dev_addr = msg.p2p_device_addr;
1154 p2p->cfg->prov_disc_req(p2p->cfg->cb_ctx, sa,
1155 msg.wps_config_methods,
1156 dev_addr, msg.pri_dev_type,
1157 msg.device_name, msg.config_methods,
1158 msg.capability ? msg.capability[0] : 0,
1159 msg.capability ? msg.capability[1] :
1160 0,
1161 msg.group_id, msg.group_id_len);
1162 }
1163
1164 if (reject != P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
1165 p2ps_prov_free(p2p);
1166
1167 if (reject == P2P_SC_SUCCESS) {
1168 switch (config_methods) {
1169 case WPS_CONFIG_DISPLAY:
1170 dev->wps_prov_info = WPS_CONFIG_KEYPAD;
1171 break;
1172 case WPS_CONFIG_KEYPAD:
1173 dev->wps_prov_info = WPS_CONFIG_DISPLAY;
1174 break;
1175 case WPS_CONFIG_PUSHBUTTON:
1176 dev->wps_prov_info = WPS_CONFIG_PUSHBUTTON;
1177 break;
1178 case WPS_CONFIG_P2PS:
1179 dev->wps_prov_info = WPS_CONFIG_P2PS;
1180 break;
1181 default:
1182 dev->wps_prov_info = 0;
1183 break;
1184 }
1185
1186 if (msg.intended_addr)
1187 os_memcpy(dev->interface_addr, msg.intended_addr,
1188 ETH_ALEN);
1189 }
1190 p2p_parse_free(&msg);
1191 }
1192
1193
p2p_validate_p2ps_pd_resp(struct p2p_data * p2p,struct p2p_message * msg)1194 static int p2p_validate_p2ps_pd_resp(struct p2p_data *p2p,
1195 struct p2p_message *msg)
1196 {
1197 u8 conn_cap_go = 0;
1198 u8 conn_cap_cli = 0;
1199 u32 session_id;
1200 u32 adv_id;
1201
1202 #define P2PS_PD_RESP_CHECK(_val, _attr) \
1203 do { \
1204 if ((_val) && !msg->_attr) { \
1205 p2p_dbg(p2p, "P2PS PD Response missing " #_attr); \
1206 return -1; \
1207 } \
1208 } while (0)
1209
1210 P2PS_PD_RESP_CHECK(1, status);
1211 P2PS_PD_RESP_CHECK(1, adv_id);
1212 P2PS_PD_RESP_CHECK(1, adv_mac);
1213 P2PS_PD_RESP_CHECK(1, capability);
1214 P2PS_PD_RESP_CHECK(1, p2p_device_info);
1215 P2PS_PD_RESP_CHECK(1, session_id);
1216 P2PS_PD_RESP_CHECK(1, session_mac);
1217 P2PS_PD_RESP_CHECK(1, feature_cap);
1218
1219 session_id = WPA_GET_LE32(msg->session_id);
1220 adv_id = WPA_GET_LE32(msg->adv_id);
1221
1222 if (p2p->p2ps_prov->session_id != session_id) {
1223 p2p_dbg(p2p,
1224 "Ignore PD Response with unexpected Session ID");
1225 return -1;
1226 }
1227
1228 if (os_memcmp(p2p->p2ps_prov->session_mac, msg->session_mac,
1229 ETH_ALEN)) {
1230 p2p_dbg(p2p,
1231 "Ignore PD Response with unexpected Session MAC");
1232 return -1;
1233 }
1234
1235 if (p2p->p2ps_prov->adv_id != adv_id) {
1236 p2p_dbg(p2p,
1237 "Ignore PD Response with unexpected Advertisement ID");
1238 return -1;
1239 }
1240
1241 if (os_memcmp(p2p->p2ps_prov->adv_mac, msg->adv_mac, ETH_ALEN) != 0) {
1242 p2p_dbg(p2p,
1243 "Ignore PD Response with unexpected Advertisement MAC");
1244 return -1;
1245 }
1246
1247 if (msg->listen_channel) {
1248 p2p_dbg(p2p,
1249 "Ignore malformed PD Response - unexpected Listen Channel");
1250 return -1;
1251 }
1252
1253 if (*msg->status == P2P_SC_SUCCESS &&
1254 !(!!msg->conn_cap ^ !!msg->persistent_dev)) {
1255 p2p_dbg(p2p,
1256 "Ignore malformed PD Response - either conn_cap or persistent group should be present");
1257 return -1;
1258 }
1259
1260 if (msg->persistent_dev && *msg->status != P2P_SC_SUCCESS) {
1261 p2p_dbg(p2p,
1262 "Ignore malformed PD Response - persistent group is present, but the status isn't success");
1263 return -1;
1264 }
1265
1266 if (msg->conn_cap) {
1267 conn_cap_go = *msg->conn_cap == P2PS_SETUP_GROUP_OWNER;
1268 conn_cap_cli = *msg->conn_cap == P2PS_SETUP_CLIENT;
1269 }
1270
1271 P2PS_PD_RESP_CHECK(msg->persistent_dev || conn_cap_go || conn_cap_cli,
1272 channel_list);
1273 P2PS_PD_RESP_CHECK(msg->persistent_dev || conn_cap_go || conn_cap_cli,
1274 config_timeout);
1275
1276 P2PS_PD_RESP_CHECK(conn_cap_go, group_id);
1277 P2PS_PD_RESP_CHECK(conn_cap_go, intended_addr);
1278 P2PS_PD_RESP_CHECK(conn_cap_go, operating_channel);
1279 /*
1280 * TODO: Also validate that operating channel is present if the device
1281 * is a GO in a persistent group. We can't do it here since we don't
1282 * know what is the role of the peer. It should be probably done in
1283 * p2ps_prov_complete callback, but currently operating channel isn't
1284 * passed to it.
1285 */
1286
1287 #undef P2PS_PD_RESP_CHECK
1288
1289 return 0;
1290 }
1291
1292
p2p_process_prov_disc_resp(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len)1293 void p2p_process_prov_disc_resp(struct p2p_data *p2p, const u8 *sa,
1294 const u8 *data, size_t len)
1295 {
1296 struct p2p_message msg;
1297 struct p2p_device *dev;
1298 u16 report_config_methods = 0, req_config_methods;
1299 u8 status = P2P_SC_SUCCESS;
1300 u32 adv_id = 0;
1301 u8 conncap = P2PS_SETUP_NEW;
1302 u8 adv_mac[ETH_ALEN];
1303 const u8 *group_mac;
1304 int passwd_id = DEV_PW_DEFAULT;
1305 int p2ps_seeker;
1306
1307 if (p2p_parse(data, len, &msg))
1308 return;
1309
1310 if (p2p->p2ps_prov && p2p_validate_p2ps_pd_resp(p2p, &msg)) {
1311 p2p_parse_free(&msg);
1312 return;
1313 }
1314
1315 /* Parse the P2PS members present */
1316 if (msg.status)
1317 status = *msg.status;
1318
1319 group_mac = msg.intended_addr;
1320
1321 if (msg.adv_mac)
1322 os_memcpy(adv_mac, msg.adv_mac, ETH_ALEN);
1323 else
1324 os_memset(adv_mac, 0, ETH_ALEN);
1325
1326 if (msg.adv_id)
1327 adv_id = WPA_GET_LE32(msg.adv_id);
1328
1329 if (msg.conn_cap) {
1330 conncap = *msg.conn_cap;
1331
1332 /* Switch bits to local relative */
1333 switch (conncap) {
1334 case P2PS_SETUP_GROUP_OWNER:
1335 conncap = P2PS_SETUP_CLIENT;
1336 break;
1337 case P2PS_SETUP_CLIENT:
1338 conncap = P2PS_SETUP_GROUP_OWNER;
1339 break;
1340 }
1341 }
1342
1343 p2p_dbg(p2p, "Received Provision Discovery Response from " MACSTR
1344 " with config methods 0x%x",
1345 MAC2STR(sa), msg.wps_config_methods);
1346
1347 dev = p2p_get_device(p2p, sa);
1348 if (dev == NULL || !dev->req_config_methods) {
1349 p2p_dbg(p2p, "Ignore Provision Discovery Response from " MACSTR
1350 " with no pending request", MAC2STR(sa));
1351 p2p_parse_free(&msg);
1352 return;
1353 } else if (msg.wfd_subelems) {
1354 wpabuf_free(dev->info.wfd_subelems);
1355 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1356 }
1357
1358 if (dev->dialog_token != msg.dialog_token) {
1359 p2p_dbg(p2p, "Ignore Provision Discovery Response with unexpected Dialog Token %u (expected %u)",
1360 msg.dialog_token, dev->dialog_token);
1361 p2p_parse_free(&msg);
1362 return;
1363 }
1364
1365 if (p2p->pending_action_state == P2P_PENDING_PD) {
1366 os_memset(p2p->pending_pd_devaddr, 0, ETH_ALEN);
1367 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
1368 }
1369
1370 p2ps_seeker = p2p->p2ps_prov && p2p->p2ps_prov->pd_seeker;
1371
1372 /*
1373 * Use a local copy of the requested config methods since
1374 * p2p_reset_pending_pd() can clear this in the peer entry.
1375 */
1376 req_config_methods = dev->req_config_methods;
1377
1378 /*
1379 * If the response is from the peer to whom a user initiated request
1380 * was sent earlier, we reset that state info here.
1381 */
1382 if (p2p->user_initiated_pd &&
1383 os_memcmp(p2p->pending_pd_devaddr, sa, ETH_ALEN) == 0)
1384 p2p_reset_pending_pd(p2p);
1385
1386 if (msg.wps_config_methods != req_config_methods) {
1387 p2p_dbg(p2p, "Peer rejected our Provision Discovery Request (received config_methods 0x%x expected 0x%x",
1388 msg.wps_config_methods, req_config_methods);
1389 if (p2p->cfg->prov_disc_fail)
1390 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, sa,
1391 P2P_PROV_DISC_REJECTED,
1392 adv_id, adv_mac, NULL);
1393 p2p_parse_free(&msg);
1394 p2ps_prov_free(p2p);
1395 goto out;
1396 }
1397
1398 report_config_methods = req_config_methods;
1399 dev->flags &= ~(P2P_DEV_PD_PEER_DISPLAY |
1400 P2P_DEV_PD_PEER_KEYPAD |
1401 P2P_DEV_PD_PEER_P2PS);
1402 if (req_config_methods & WPS_CONFIG_DISPLAY) {
1403 p2p_dbg(p2p, "Peer " MACSTR
1404 " accepted to show a PIN on display", MAC2STR(sa));
1405 dev->flags |= P2P_DEV_PD_PEER_DISPLAY;
1406 passwd_id = DEV_PW_REGISTRAR_SPECIFIED;
1407 } else if (msg.wps_config_methods & WPS_CONFIG_KEYPAD) {
1408 p2p_dbg(p2p, "Peer " MACSTR
1409 " accepted to write our PIN using keypad",
1410 MAC2STR(sa));
1411 dev->flags |= P2P_DEV_PD_PEER_KEYPAD;
1412 passwd_id = DEV_PW_USER_SPECIFIED;
1413 } else if (msg.wps_config_methods & WPS_CONFIG_P2PS) {
1414 p2p_dbg(p2p, "Peer " MACSTR " accepted P2PS PIN",
1415 MAC2STR(sa));
1416 dev->flags |= P2P_DEV_PD_PEER_P2PS;
1417 passwd_id = DEV_PW_P2PS_DEFAULT;
1418 }
1419
1420 if ((status == P2P_SC_SUCCESS || status == P2P_SC_SUCCESS_DEFERRED) &&
1421 p2p->p2ps_prov) {
1422 dev->oper_freq = 0;
1423
1424 /*
1425 * Save the reported channel list and operating frequency.
1426 * Note that the specification mandates that the responder
1427 * should include in the channel list only channels reported by
1428 * the initiator, so this is only a sanity check, and if this
1429 * fails the flow would continue, although it would probably
1430 * fail. Same is true for the operating channel.
1431 */
1432 if (msg.channel_list && msg.channel_list_len &&
1433 p2p_peer_channels_check(p2p, &p2p->channels, dev,
1434 msg.channel_list,
1435 msg.channel_list_len) < 0)
1436 p2p_dbg(p2p, "P2PS PD Response - no common channels");
1437
1438 if (msg.operating_channel) {
1439 if (p2p_channels_includes(&p2p->channels,
1440 msg.operating_channel[3],
1441 msg.operating_channel[4]) &&
1442 p2p_channels_includes(&dev->channels,
1443 msg.operating_channel[3],
1444 msg.operating_channel[4])) {
1445 dev->oper_freq =
1446 p2p_channel_to_freq(
1447 msg.operating_channel[3],
1448 msg.operating_channel[4]);
1449 } else {
1450 p2p_dbg(p2p,
1451 "P2PS PD Response - invalid operating channel");
1452 }
1453 }
1454
1455 if (p2p->cfg->p2ps_prov_complete) {
1456 int freq = 0;
1457
1458 if (conncap == P2PS_SETUP_GROUP_OWNER) {
1459 u8 tmp;
1460
1461 /*
1462 * Re-select the operating channel as it is
1463 * possible that original channel is no longer
1464 * valid. This should not really fail.
1465 */
1466 if (p2p_go_select_channel(p2p, dev, &tmp) < 0)
1467 p2p_dbg(p2p,
1468 "P2PS PD channel selection failed");
1469
1470 freq = p2p_channel_to_freq(p2p->op_reg_class,
1471 p2p->op_channel);
1472 if (freq < 0)
1473 freq = 0;
1474 }
1475
1476 p2p->cfg->p2ps_prov_complete(
1477 p2p->cfg->cb_ctx, status, sa, adv_mac,
1478 p2p->p2ps_prov->session_mac,
1479 group_mac, adv_id, p2p->p2ps_prov->session_id,
1480 conncap, passwd_id, msg.persistent_ssid,
1481 msg.persistent_ssid_len, 1, 0, NULL,
1482 msg.feature_cap, msg.feature_cap_len, freq,
1483 msg.group_id ? msg.group_id + ETH_ALEN : NULL,
1484 msg.group_id ? msg.group_id_len - ETH_ALEN : 0);
1485 }
1486 p2ps_prov_free(p2p);
1487 } else if (status != P2P_SC_SUCCESS &&
1488 status != P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE &&
1489 status != P2P_SC_SUCCESS_DEFERRED && p2p->p2ps_prov) {
1490 if (p2p->cfg->p2ps_prov_complete)
1491 p2p->cfg->p2ps_prov_complete(
1492 p2p->cfg->cb_ctx, status, sa, adv_mac,
1493 p2p->p2ps_prov->session_mac,
1494 group_mac, adv_id, p2p->p2ps_prov->session_id,
1495 0, 0, NULL, 0, 1, 0, NULL, NULL, 0, 0, NULL, 0);
1496 p2ps_prov_free(p2p);
1497 }
1498
1499 if (status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) {
1500 if (p2p->cfg->remove_stale_groups) {
1501 p2p->cfg->remove_stale_groups(p2p->cfg->cb_ctx,
1502 dev->info.p2p_device_addr,
1503 NULL, NULL, 0);
1504 }
1505
1506 if (msg.session_info && msg.session_info_len) {
1507 size_t info_len = msg.session_info_len;
1508 char *deferred_sess_resp = os_malloc(2 * info_len + 1);
1509
1510 if (!deferred_sess_resp) {
1511 p2p_parse_free(&msg);
1512 p2ps_prov_free(p2p);
1513 goto out;
1514 }
1515 utf8_escape((char *) msg.session_info, info_len,
1516 deferred_sess_resp, 2 * info_len + 1);
1517
1518 if (p2p->cfg->prov_disc_fail)
1519 p2p->cfg->prov_disc_fail(
1520 p2p->cfg->cb_ctx, sa,
1521 P2P_PROV_DISC_INFO_UNAVAILABLE,
1522 adv_id, adv_mac,
1523 deferred_sess_resp);
1524 os_free(deferred_sess_resp);
1525 } else
1526 if (p2p->cfg->prov_disc_fail)
1527 p2p->cfg->prov_disc_fail(
1528 p2p->cfg->cb_ctx, sa,
1529 P2P_PROV_DISC_INFO_UNAVAILABLE,
1530 adv_id, adv_mac, NULL);
1531 } else if (status != P2P_SC_SUCCESS) {
1532 p2p_dbg(p2p, "Peer rejected our Provision Discovery Request");
1533 if (p2p->cfg->prov_disc_fail)
1534 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, sa,
1535 P2P_PROV_DISC_REJECTED,
1536 adv_id, adv_mac, NULL);
1537 p2p_parse_free(&msg);
1538 p2ps_prov_free(p2p);
1539 goto out;
1540 }
1541
1542 /* Store the provisioning info */
1543 dev->wps_prov_info = msg.wps_config_methods;
1544 if (msg.intended_addr)
1545 os_memcpy(dev->interface_addr, msg.intended_addr, ETH_ALEN);
1546
1547 p2p_parse_free(&msg);
1548
1549 out:
1550 dev->req_config_methods = 0;
1551 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
1552 if (dev->flags & P2P_DEV_PD_BEFORE_GO_NEG) {
1553 p2p_dbg(p2p, "Start GO Neg after the PD-before-GO-Neg workaround with "
1554 MACSTR, MAC2STR(dev->info.p2p_device_addr));
1555 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1556 p2p_connect_send(p2p, dev);
1557 return;
1558 }
1559
1560 /*
1561 * prov_disc_resp callback is used to generate P2P-PROV-DISC-ENTER-PIN,
1562 * P2P-PROV-DISC-SHOW-PIN, and P2P-PROV-DISC-PBC-REQ events.
1563 * Call it only for a legacy P2P PD or for P2PS PD scenarios where
1564 * show/enter PIN events are needed.
1565 *
1566 * The callback is called in the following cases:
1567 * 1. Legacy P2P PD response with a status SUCCESS
1568 * 2. P2PS, advertiser method: DISPLAY, autoaccept: true,
1569 * response status: SUCCESS, local method KEYPAD
1570 * 3. P2PS, advertiser method: KEYPAD,Seeker side,
1571 * response status: INFO_CURRENTLY_UNAVAILABLE,
1572 * local method: DISPLAY
1573 */
1574 if (p2p->cfg->prov_disc_resp &&
1575 ((status == P2P_SC_SUCCESS && !adv_id) ||
1576 (p2ps_seeker && status == P2P_SC_SUCCESS &&
1577 passwd_id == DEV_PW_REGISTRAR_SPECIFIED) ||
1578 (p2ps_seeker &&
1579 status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE &&
1580 passwd_id == DEV_PW_USER_SPECIFIED)))
1581 p2p->cfg->prov_disc_resp(p2p->cfg->cb_ctx, sa,
1582 report_config_methods);
1583
1584 if (p2p->state == P2P_PD_DURING_FIND) {
1585 p2p_stop_listen_for_freq(p2p, 0);
1586 p2p_continue_find(p2p);
1587 }
1588 }
1589
1590
p2p_send_prov_disc_req(struct p2p_data * p2p,struct p2p_device * dev,int join,int force_freq)1591 int p2p_send_prov_disc_req(struct p2p_data *p2p, struct p2p_device *dev,
1592 int join, int force_freq)
1593 {
1594 struct wpabuf *req;
1595 int freq;
1596
1597 if (force_freq > 0)
1598 freq = force_freq;
1599 else
1600 freq = dev->listen_freq > 0 ? dev->listen_freq :
1601 dev->oper_freq;
1602 if (freq <= 0) {
1603 p2p_dbg(p2p, "No Listen/Operating frequency known for the peer "
1604 MACSTR " to send Provision Discovery Request",
1605 MAC2STR(dev->info.p2p_device_addr));
1606 return -1;
1607 }
1608
1609 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1610 if (!(dev->info.dev_capab &
1611 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1612 p2p_dbg(p2p, "Cannot use PD with P2P Device " MACSTR
1613 " that is in a group and is not discoverable",
1614 MAC2STR(dev->info.p2p_device_addr));
1615 return -1;
1616 }
1617 /* TODO: use device discoverability request through GO */
1618 }
1619
1620 if (p2p->p2ps_prov) {
1621 if (p2p->p2ps_prov->status == P2P_SC_SUCCESS_DEFERRED) {
1622 if (p2p->p2ps_prov->method == WPS_CONFIG_DISPLAY)
1623 dev->req_config_methods = WPS_CONFIG_KEYPAD;
1624 else if (p2p->p2ps_prov->method == WPS_CONFIG_KEYPAD)
1625 dev->req_config_methods = WPS_CONFIG_DISPLAY;
1626 else
1627 dev->req_config_methods = WPS_CONFIG_P2PS;
1628 } else {
1629 /* Order of preference, based on peer's capabilities */
1630 if (p2p->p2ps_prov->method)
1631 dev->req_config_methods =
1632 p2p->p2ps_prov->method;
1633 else if (dev->info.config_methods & WPS_CONFIG_P2PS)
1634 dev->req_config_methods = WPS_CONFIG_P2PS;
1635 else if (dev->info.config_methods & WPS_CONFIG_DISPLAY)
1636 dev->req_config_methods = WPS_CONFIG_DISPLAY;
1637 else
1638 dev->req_config_methods = WPS_CONFIG_KEYPAD;
1639 }
1640 p2p_dbg(p2p,
1641 "Building PD Request based on P2PS config method 0x%x status %d --> req_config_methods 0x%x",
1642 p2p->p2ps_prov->method, p2p->p2ps_prov->status,
1643 dev->req_config_methods);
1644
1645 if (p2p_prepare_channel(p2p, dev, p2p->p2ps_prov->force_freq,
1646 p2p->p2ps_prov->pref_freq, 1) < 0)
1647 return -1;
1648 }
1649
1650 req = p2p_build_prov_disc_req(p2p, dev, join);
1651 if (req == NULL)
1652 return -1;
1653
1654 if (p2p->state != P2P_IDLE)
1655 p2p_stop_listen_for_freq(p2p, freq);
1656 p2p->pending_action_state = P2P_PENDING_PD;
1657 if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr,
1658 p2p->cfg->dev_addr, dev->info.p2p_device_addr,
1659 wpabuf_head(req), wpabuf_len(req), 200) < 0) {
1660 p2p_dbg(p2p, "Failed to send Action frame");
1661 wpabuf_free(req);
1662 return -1;
1663 }
1664
1665 os_memcpy(p2p->pending_pd_devaddr, dev->info.p2p_device_addr, ETH_ALEN);
1666
1667 wpabuf_free(req);
1668 return 0;
1669 }
1670
1671
p2p_prov_disc_req(struct p2p_data * p2p,const u8 * peer_addr,struct p2ps_provision * p2ps_prov,u16 config_methods,int join,int force_freq,int user_initiated_pd)1672 int p2p_prov_disc_req(struct p2p_data *p2p, const u8 *peer_addr,
1673 struct p2ps_provision *p2ps_prov,
1674 u16 config_methods, int join, int force_freq,
1675 int user_initiated_pd)
1676 {
1677 struct p2p_device *dev;
1678
1679 dev = p2p_get_device(p2p, peer_addr);
1680 if (dev == NULL)
1681 dev = p2p_get_device_interface(p2p, peer_addr);
1682 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1683 p2p_dbg(p2p, "Provision Discovery Request destination " MACSTR
1684 " not yet known", MAC2STR(peer_addr));
1685 os_free(p2ps_prov);
1686 return -1;
1687 }
1688
1689 p2p_dbg(p2p, "Provision Discovery Request with " MACSTR
1690 " (config methods 0x%x)",
1691 MAC2STR(peer_addr), config_methods);
1692 if (config_methods == 0 && !p2ps_prov) {
1693 os_free(p2ps_prov);
1694 return -1;
1695 }
1696
1697 if (p2ps_prov && p2ps_prov->status == P2P_SC_SUCCESS_DEFERRED &&
1698 p2p->p2ps_prov) {
1699 /* Use cached method from deferred provisioning */
1700 p2ps_prov->method = p2p->p2ps_prov->method;
1701 }
1702
1703 /* Reset provisioning info */
1704 dev->wps_prov_info = 0;
1705 p2ps_prov_free(p2p);
1706 p2p->p2ps_prov = p2ps_prov;
1707
1708 dev->req_config_methods = config_methods;
1709 if (join)
1710 dev->flags |= P2P_DEV_PD_FOR_JOIN;
1711 else
1712 dev->flags &= ~P2P_DEV_PD_FOR_JOIN;
1713
1714 if (p2p->state != P2P_IDLE && p2p->state != P2P_SEARCH &&
1715 p2p->state != P2P_LISTEN_ONLY) {
1716 p2p_dbg(p2p, "Busy with other operations; postpone Provision Discovery Request with "
1717 MACSTR " (config methods 0x%x)",
1718 MAC2STR(peer_addr), config_methods);
1719 return 0;
1720 }
1721
1722 p2p->user_initiated_pd = user_initiated_pd;
1723 p2p->pd_force_freq = force_freq;
1724
1725 if (p2p->user_initiated_pd)
1726 p2p->pd_retries = MAX_PROV_DISC_REQ_RETRIES;
1727
1728 /*
1729 * Assign dialog token here to use the same value in each retry within
1730 * the same PD exchange.
1731 */
1732 dev->dialog_token++;
1733 if (dev->dialog_token == 0)
1734 dev->dialog_token = 1;
1735
1736 return p2p_send_prov_disc_req(p2p, dev, join, force_freq);
1737 }
1738
1739
p2p_reset_pending_pd(struct p2p_data * p2p)1740 void p2p_reset_pending_pd(struct p2p_data *p2p)
1741 {
1742 struct p2p_device *dev;
1743
1744 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
1745 if (os_memcmp(p2p->pending_pd_devaddr,
1746 dev->info.p2p_device_addr, ETH_ALEN))
1747 continue;
1748 if (!dev->req_config_methods)
1749 continue;
1750 if (dev->flags & P2P_DEV_PD_FOR_JOIN)
1751 continue;
1752 /* Reset the config methods of the device */
1753 dev->req_config_methods = 0;
1754 }
1755
1756 p2p->user_initiated_pd = 0;
1757 os_memset(p2p->pending_pd_devaddr, 0, ETH_ALEN);
1758 p2p->pd_retries = 0;
1759 p2p->pd_force_freq = 0;
1760 }
1761
1762
p2ps_prov_free(struct p2p_data * p2p)1763 void p2ps_prov_free(struct p2p_data *p2p)
1764 {
1765 os_free(p2p->p2ps_prov);
1766 p2p->p2ps_prov = NULL;
1767 }
1768