1 /*
2 * Wi-Fi Direct - P2P Invitation procedure
3 * Copyright (c) 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 "p2p_i.h"
15 #include "p2p.h"
16
17
p2p_build_invitation_req(struct p2p_data * p2p,struct p2p_device * peer,const u8 * go_dev_addr,int dev_pw_id)18 static struct wpabuf * p2p_build_invitation_req(struct p2p_data *p2p,
19 struct p2p_device *peer,
20 const u8 *go_dev_addr,
21 int dev_pw_id)
22 {
23 struct wpabuf *buf;
24 u8 *len;
25 const u8 *dev_addr;
26 size_t extra = 0;
27 bool is_6ghz_capab;
28
29 #ifdef CONFIG_WIFI_DISPLAY
30 struct wpabuf *wfd_ie = p2p->wfd_ie_invitation;
31 if (wfd_ie && p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
32 size_t i;
33 for (i = 0; i < p2p->num_groups; i++) {
34 struct p2p_group *g = p2p->groups[i];
35 struct wpabuf *ie;
36 if (!ether_addr_equal(p2p_group_get_interface_addr(g),
37 p2p->inv_bssid))
38 continue;
39 ie = p2p_group_get_wfd_ie(g);
40 if (ie) {
41 wfd_ie = ie;
42 break;
43 }
44 }
45 }
46 if (wfd_ie)
47 extra = wpabuf_len(wfd_ie);
48 #endif /* CONFIG_WIFI_DISPLAY */
49
50 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_INV_REQ])
51 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_INV_REQ]);
52
53 buf = wpabuf_alloc(1000 + extra);
54 if (buf == NULL)
55 return NULL;
56
57 peer->dialog_token++;
58 if (peer->dialog_token == 0)
59 peer->dialog_token = 1;
60 p2p_buf_add_public_action_hdr(buf, P2P_INVITATION_REQ,
61 peer->dialog_token);
62
63 len = p2p_buf_add_ie_hdr(buf);
64 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO || !p2p->inv_persistent)
65 p2p_buf_add_config_timeout(buf, 0, 0);
66 else
67 p2p_buf_add_config_timeout(buf, p2p->go_timeout,
68 p2p->client_timeout);
69 p2p_buf_add_invitation_flags(buf, p2p->inv_persistent ?
70 P2P_INVITATION_FLAGS_TYPE : 0);
71 if (p2p->inv_role != P2P_INVITE_ROLE_CLIENT ||
72 !(peer->flags & P2P_DEV_NO_PREF_CHAN))
73 p2p_buf_add_operating_channel(buf, p2p->cfg->country,
74 p2p->op_reg_class,
75 p2p->op_channel);
76 if (p2p->inv_bssid_set)
77 p2p_buf_add_group_bssid(buf, p2p->inv_bssid);
78 is_6ghz_capab = is_p2p_6ghz_capable(p2p) &&
79 p2p_is_peer_6ghz_capab(p2p, peer->info.p2p_device_addr);
80 p2p_buf_add_channel_list(buf, p2p->cfg->country, &p2p->channels,
81 is_6ghz_capab);
82 if (go_dev_addr)
83 dev_addr = go_dev_addr;
84 else if (p2p->inv_role == P2P_INVITE_ROLE_CLIENT)
85 dev_addr = peer->info.p2p_device_addr;
86 else
87 dev_addr = p2p->cfg->dev_addr;
88 p2p_buf_add_group_id(buf, dev_addr, p2p->inv_ssid, p2p->inv_ssid_len);
89 p2p_buf_add_device_info(buf, p2p, peer);
90 p2p_buf_update_ie_hdr(buf, len);
91
92 p2p_buf_add_pref_channel_list(buf, p2p->pref_freq_list,
93 p2p->num_pref_freq);
94
95 #ifdef CONFIG_WIFI_DISPLAY
96 if (wfd_ie)
97 wpabuf_put_buf(buf, wfd_ie);
98 #endif /* CONFIG_WIFI_DISPLAY */
99
100 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_INV_REQ])
101 wpabuf_put_buf(buf, p2p->vendor_elem[VENDOR_ELEM_P2P_INV_REQ]);
102
103 if (dev_pw_id >= 0) {
104 /* WSC IE in Invitation Request for NFC static handover */
105 p2p_build_wps_ie(p2p, buf, dev_pw_id, 0);
106 }
107
108 return buf;
109 }
110
111
p2p_build_invitation_resp(struct p2p_data * p2p,struct p2p_device * peer,u8 dialog_token,u8 status,const u8 * group_bssid,u8 reg_class,u8 channel,struct p2p_channels * channels)112 static struct wpabuf * p2p_build_invitation_resp(struct p2p_data *p2p,
113 struct p2p_device *peer,
114 u8 dialog_token, u8 status,
115 const u8 *group_bssid,
116 u8 reg_class, u8 channel,
117 struct p2p_channels *channels)
118 {
119 struct wpabuf *buf;
120 u8 *len;
121 size_t extra = 0;
122
123 #ifdef CONFIG_WIFI_DISPLAY
124 struct wpabuf *wfd_ie = p2p->wfd_ie_invitation;
125 if (wfd_ie && group_bssid) {
126 size_t i;
127 for (i = 0; i < p2p->num_groups; i++) {
128 struct p2p_group *g = p2p->groups[i];
129 struct wpabuf *ie;
130 if (!ether_addr_equal(p2p_group_get_interface_addr(g),
131 group_bssid))
132 continue;
133 ie = p2p_group_get_wfd_ie(g);
134 if (ie) {
135 wfd_ie = ie;
136 break;
137 }
138 }
139 }
140 if (wfd_ie)
141 extra = wpabuf_len(wfd_ie);
142 #endif /* CONFIG_WIFI_DISPLAY */
143
144 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_INV_RESP])
145 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_INV_RESP]);
146
147 buf = wpabuf_alloc(1000 + extra);
148 if (buf == NULL)
149 return NULL;
150
151 p2p_buf_add_public_action_hdr(buf, P2P_INVITATION_RESP,
152 dialog_token);
153
154 len = p2p_buf_add_ie_hdr(buf);
155 p2p_buf_add_status(buf, status);
156 p2p_buf_add_config_timeout(buf, 0, 0); /* FIX */
157 if (reg_class && channel)
158 p2p_buf_add_operating_channel(buf, p2p->cfg->country,
159 reg_class, channel);
160 if (group_bssid)
161 p2p_buf_add_group_bssid(buf, group_bssid);
162 if (channels) {
163 bool is_6ghz_capab;
164
165 is_6ghz_capab = is_p2p_6ghz_capable(p2p) &&
166 p2p_is_peer_6ghz_capab(p2p, peer->info.p2p_device_addr);
167 p2p_buf_add_channel_list(buf, p2p->cfg->country, channels,
168 is_6ghz_capab);
169 }
170 p2p_buf_update_ie_hdr(buf, len);
171
172 #ifdef CONFIG_WIFI_DISPLAY
173 if (wfd_ie)
174 wpabuf_put_buf(buf, wfd_ie);
175 #endif /* CONFIG_WIFI_DISPLAY */
176
177 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_INV_RESP])
178 wpabuf_put_buf(buf, p2p->vendor_elem[VENDOR_ELEM_P2P_INV_RESP]);
179
180 return buf;
181 }
182
183
p2p_process_invitation_req(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len,int rx_freq)184 struct wpabuf * p2p_process_invitation_req(struct p2p_data *p2p, const u8 *sa,
185 const u8 *data, size_t len,
186 int rx_freq)
187 {
188 struct p2p_device *dev;
189 struct p2p_message msg;
190 struct wpabuf *resp = NULL;
191 u8 status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
192 int go = 0;
193 u8 group_bssid[ETH_ALEN], *bssid;
194 int op_freq = 0;
195 u8 reg_class = 0, channel = 0;
196 struct p2p_channels all_channels, intersection, *channels = NULL;
197 int persistent;
198
199 os_memset(group_bssid, 0, sizeof(group_bssid));
200
201 p2p_dbg(p2p, "Received Invitation Request from " MACSTR " (freq=%d)",
202 MAC2STR(sa), rx_freq);
203
204 if (p2p_parse(data, len, &msg))
205 return NULL;
206
207 dev = p2p_get_device(p2p, sa);
208 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
209 p2p_dbg(p2p, "Invitation Request from unknown peer " MACSTR,
210 MAC2STR(sa));
211
212 if (p2p_add_device(p2p, sa, rx_freq, NULL, 0, data + 1, len - 1,
213 0)) {
214 p2p_dbg(p2p, "Invitation Request add device failed "
215 MACSTR, MAC2STR(sa));
216 status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
217 goto fail;
218 }
219
220 dev = p2p_get_device(p2p, sa);
221 if (dev == NULL) {
222 p2p_dbg(p2p, "Reject Invitation Request from unknown peer "
223 MACSTR, MAC2STR(sa));
224 status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
225 goto fail;
226 }
227 }
228
229 if (!msg.group_id || !msg.channel_list) {
230 p2p_dbg(p2p, "Mandatory attribute missing in Invitation Request from "
231 MACSTR, MAC2STR(sa));
232 status = P2P_SC_FAIL_INVALID_PARAMS;
233 goto fail;
234 }
235
236 if (msg.invitation_flags)
237 persistent = *msg.invitation_flags & P2P_INVITATION_FLAGS_TYPE;
238 else {
239 /* Invitation Flags is a mandatory attribute starting from P2P
240 * spec 1.06. As a backwards compatibility mechanism, assume
241 * the request was for a persistent group if the attribute is
242 * missing.
243 */
244 p2p_dbg(p2p, "Mandatory Invitation Flags attribute missing from Invitation Request");
245 persistent = 1;
246 }
247
248 p2p_channels_union(&p2p->cfg->channels, &p2p->cfg->cli_channels,
249 &all_channels);
250
251 if (p2p_peer_channels_check(p2p, &all_channels, dev,
252 msg.channel_list, msg.channel_list_len) <
253 0) {
254 p2p_dbg(p2p, "No common channels found");
255 status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
256 goto fail;
257 }
258
259 p2p_channels_dump(p2p, "own channels", &p2p->cfg->channels);
260 p2p_channels_dump(p2p, "own client channels", &all_channels);
261 p2p_channels_dump(p2p, "peer channels", &dev->channels);
262 p2p_channels_intersect(&all_channels, &dev->channels,
263 &intersection);
264 p2p_channels_dump(p2p, "intersection", &intersection);
265
266 if (p2p->cfg->invitation_process) {
267 status = p2p->cfg->invitation_process(
268 p2p->cfg->cb_ctx, sa, msg.group_bssid, msg.group_id,
269 msg.group_id + ETH_ALEN, msg.group_id_len - ETH_ALEN,
270 &go, group_bssid, &op_freq, persistent, &intersection,
271 msg.dev_password_id_present ? msg.dev_password_id : -1);
272 }
273
274 if (go) {
275 p2p_channels_intersect(&p2p->cfg->channels, &dev->channels,
276 &intersection);
277 p2p_channels_dump(p2p, "intersection(GO)", &intersection);
278 if (intersection.reg_classes == 0) {
279 p2p_dbg(p2p, "No common channels found (GO)");
280 status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
281 goto fail;
282 }
283 }
284
285 if (op_freq) {
286 p2p_dbg(p2p, "Invitation processing forced frequency %d MHz",
287 op_freq);
288 if (p2p_freq_to_channel(op_freq, ®_class, &channel) < 0) {
289 p2p_dbg(p2p, "Unknown forced freq %d MHz from invitation_process()",
290 op_freq);
291 status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
292 goto fail;
293 }
294
295 if (!p2p_channels_includes(&intersection, reg_class, channel))
296 {
297 p2p_dbg(p2p, "forced freq %d MHz not in the supported channels intersection",
298 op_freq);
299 status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
300 goto fail;
301 }
302
303 if (status == P2P_SC_SUCCESS)
304 channels = &intersection;
305 } else {
306 p2p_dbg(p2p, "No forced channel from invitation processing - figure out best one to use");
307
308 /* Default to own configuration as a starting point */
309 p2p->op_reg_class = p2p->cfg->op_reg_class;
310 p2p->op_channel = p2p->cfg->op_channel;
311 p2p_dbg(p2p, "Own default op_class %d channel %d",
312 p2p->op_reg_class, p2p->op_channel);
313
314 /* Use peer preference if specified and compatible */
315 if (msg.operating_channel) {
316 int req_freq;
317 req_freq = p2p_channel_to_freq(
318 msg.operating_channel[3],
319 msg.operating_channel[4]);
320 p2p_dbg(p2p, "Peer operating channel preference: %d MHz",
321 req_freq);
322 if (req_freq > 0 &&
323 p2p_channels_includes(&intersection,
324 msg.operating_channel[3],
325 msg.operating_channel[4])) {
326 p2p->op_reg_class = msg.operating_channel[3];
327 p2p->op_channel = msg.operating_channel[4];
328 p2p_dbg(p2p, "Use peer preference op_class %d channel %d",
329 p2p->op_reg_class, p2p->op_channel);
330 } else {
331 p2p_dbg(p2p, "Cannot use peer channel preference");
332 }
333 }
334
335 /* Reselect the channel only for the case of the GO */
336 if (go &&
337 !p2p_channels_includes(&intersection, p2p->op_reg_class,
338 p2p->op_channel)) {
339 p2p_dbg(p2p, "Initially selected channel (op_class %d channel %d) not in channel intersection - try to reselect",
340 p2p->op_reg_class, p2p->op_channel);
341 p2p_reselect_channel(p2p, &intersection);
342 p2p_dbg(p2p, "Re-selection result: op_class %d channel %d",
343 p2p->op_reg_class, p2p->op_channel);
344 if (!p2p_channels_includes(&intersection,
345 p2p->op_reg_class,
346 p2p->op_channel)) {
347 p2p_dbg(p2p, "Peer does not support selected operating channel (reg_class=%u channel=%u)",
348 p2p->op_reg_class, p2p->op_channel);
349 status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
350 goto fail;
351 }
352 } else if (go && !(dev->flags & P2P_DEV_FORCE_FREQ) &&
353 !p2p->cfg->cfg_op_channel) {
354 p2p_dbg(p2p, "Try to reselect channel selection with peer information received; previously selected op_class %u channel %u",
355 p2p->op_reg_class, p2p->op_channel);
356 p2p_reselect_channel(p2p, &intersection);
357 }
358
359 /*
360 * Use the driver preferred frequency list extension if
361 * supported.
362 */
363 p2p_check_pref_chan(p2p, go, dev, &msg);
364
365 op_freq = p2p_channel_to_freq(p2p->op_reg_class,
366 p2p->op_channel);
367 if (op_freq < 0) {
368 p2p_dbg(p2p, "Unknown operational channel (country=%c%c reg_class=%u channel=%u)",
369 p2p->cfg->country[0], p2p->cfg->country[1],
370 p2p->op_reg_class, p2p->op_channel);
371 status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
372 goto fail;
373 }
374 p2p_dbg(p2p, "Selected operating channel - %d MHz", op_freq);
375
376 if (status == P2P_SC_SUCCESS) {
377 reg_class = p2p->op_reg_class;
378 channel = p2p->op_channel;
379 channels = &intersection;
380 }
381 }
382
383 fail:
384 if (go && status == P2P_SC_SUCCESS && !is_zero_ether_addr(group_bssid))
385 bssid = group_bssid;
386 else
387 bssid = NULL;
388 resp = p2p_build_invitation_resp(p2p, dev, msg.dialog_token, status,
389 bssid, reg_class, channel, channels);
390
391 /*
392 * Store copy of invitation data to be used when processing TX status
393 * callback for the Acton frame.
394 */
395 os_memcpy(p2p->inv_sa, sa, ETH_ALEN);
396 if (msg.group_bssid) {
397 os_memcpy(p2p->inv_group_bssid, msg.group_bssid, ETH_ALEN);
398 p2p->inv_group_bssid_ptr = p2p->inv_group_bssid;
399 } else
400 p2p->inv_group_bssid_ptr = NULL;
401 if (msg.group_id) {
402 if (msg.group_id_len - ETH_ALEN <= SSID_MAX_LEN) {
403 os_memcpy(p2p->inv_ssid, msg.group_id + ETH_ALEN,
404 msg.group_id_len - ETH_ALEN);
405 p2p->inv_ssid_len = msg.group_id_len - ETH_ALEN;
406 }
407 os_memcpy(p2p->inv_go_dev_addr, msg.group_id, ETH_ALEN);
408 } else {
409 p2p->inv_ssid_len = 0;
410 os_memset(p2p->inv_go_dev_addr, 0, ETH_ALEN);
411 }
412 p2p->inv_status = status;
413 p2p->inv_op_freq = op_freq;
414 p2p_parse_free(&msg);
415 return resp;
416 }
417
418
p2p_handle_invitation_req(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len,int rx_freq)419 void p2p_handle_invitation_req(struct p2p_data *p2p, const u8 *sa,
420 const u8 *data, size_t len, int rx_freq)
421 {
422 int freq;
423 struct wpabuf *resp;
424
425 resp = p2p_process_invitation_req(p2p, sa, data, len, rx_freq);
426 if (!resp)
427 return;
428
429 if (rx_freq > 0)
430 freq = rx_freq;
431 else
432 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
433 p2p->cfg->channel);
434 if (freq < 0)
435 p2p_dbg(p2p, "Unknown regulatory class/channel");
436
437 p2p->pending_action_state = P2P_PENDING_INVITATION_RESPONSE;
438 if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr,
439 p2p->cfg->dev_addr,
440 wpabuf_head(resp), wpabuf_len(resp), 50) < 0) {
441 p2p_dbg(p2p, "Failed to send Action frame");
442 }
443
444 wpabuf_free(resp);
445 }
446
447
p2p_process_invitation_resp(struct p2p_data * p2p,const u8 * sa,const u8 * data,size_t len)448 void p2p_process_invitation_resp(struct p2p_data *p2p, const u8 *sa,
449 const u8 *data, size_t len)
450 {
451 struct p2p_device *dev;
452 struct p2p_message msg;
453 struct p2p_channels intersection, *channels = NULL;
454
455 p2p_dbg(p2p, "Received Invitation Response from " MACSTR,
456 MAC2STR(sa));
457
458 dev = p2p_get_device(p2p, sa);
459 if (dev == NULL) {
460 p2p_dbg(p2p, "Ignore Invitation Response from unknown peer "
461 MACSTR, MAC2STR(sa));
462 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
463 return;
464 }
465
466 if (dev != p2p->invite_peer) {
467 p2p_dbg(p2p, "Ignore unexpected Invitation Response from peer "
468 MACSTR, MAC2STR(sa));
469 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
470 return;
471 }
472
473 if (p2p_parse(data, len, &msg)) {
474 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
475 return;
476 }
477
478 if (!msg.status) {
479 p2p_dbg(p2p, "Mandatory Status attribute missing in Invitation Response from "
480 MACSTR, MAC2STR(sa));
481 p2p_parse_free(&msg);
482 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
483 return;
484 }
485
486 /*
487 * We should not really receive a replayed response twice since
488 * duplicate frames are supposed to be dropped. However, not all drivers
489 * do that for pre-association frames. We did not use to verify dialog
490 * token matches for invitation response frames, but that check can be
491 * safely used to drop a replayed response to the previous Invitation
492 * Request in case the suggested operating channel was changed. This
493 * allows a duplicated reject frame to be dropped with the assumption
494 * that the real response follows after it.
495 */
496 if (*msg.status == P2P_SC_FAIL_NO_COMMON_CHANNELS &&
497 p2p->retry_invite_req_sent &&
498 msg.dialog_token != dev->dialog_token) {
499 p2p_dbg(p2p, "Unexpected Dialog Token %u (expected %u)",
500 msg.dialog_token, dev->dialog_token);
501 p2p_parse_free(&msg);
502 return;
503 }
504
505 if (*msg.status == P2P_SC_FAIL_NO_COMMON_CHANNELS &&
506 p2p->retry_invite_req &&
507 p2p_channel_random_social(&p2p->cfg->channels, &p2p->op_reg_class,
508 &p2p->op_channel, NULL, NULL) == 0) {
509 p2p->retry_invite_req = 0;
510 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
511 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
512 p2p_set_state(p2p, P2P_INVITE);
513 p2p_dbg(p2p, "Resend Invitation Request setting op_class %u channel %u as operating channel",
514 p2p->op_reg_class, p2p->op_channel);
515 p2p->retry_invite_req_sent = 1;
516 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
517 p2p->invite_dev_pw_id);
518 p2p_parse_free(&msg);
519 return;
520 }
521 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
522 p2p->retry_invite_req = 0;
523
524 if (!msg.channel_list && *msg.status == P2P_SC_SUCCESS) {
525 p2p_dbg(p2p, "Mandatory Channel List attribute missing in Invitation Response from "
526 MACSTR, MAC2STR(sa));
527 #ifdef CONFIG_P2P_STRICT
528 p2p_parse_free(&msg);
529 return;
530 #endif /* CONFIG_P2P_STRICT */
531 /* Try to survive without peer channel list */
532 channels = &p2p->channels;
533 } else if (!msg.channel_list) {
534 /* Non-success cases are not required to include Channel List */
535 channels = &p2p->channels;
536 } else if (p2p_peer_channels_check(p2p, &p2p->channels, dev,
537 msg.channel_list,
538 msg.channel_list_len) < 0) {
539 p2p_dbg(p2p, "No common channels found");
540 p2p_parse_free(&msg);
541 return;
542 } else {
543 p2p_channels_intersect(&p2p->channels, &dev->channels,
544 &intersection);
545 channels = &intersection;
546 }
547
548 if (p2p->cfg->invitation_result) {
549 int peer_oper_freq = 0;
550 int freq = p2p_channel_to_freq(p2p->op_reg_class,
551 p2p->op_channel);
552 if (freq < 0)
553 freq = 0;
554
555 if (msg.operating_channel) {
556 peer_oper_freq = p2p_channel_to_freq(
557 msg.operating_channel[3],
558 msg.operating_channel[4]);
559 if (peer_oper_freq < 0)
560 peer_oper_freq = 0;
561 }
562
563 /*
564 * Use the driver preferred frequency list extension if
565 * supported.
566 */
567 p2p_check_pref_chan(p2p, 0, dev, &msg);
568
569 p2p->cfg->invitation_result(p2p->cfg->cb_ctx, *msg.status,
570 msg.group_bssid, channels, sa,
571 freq, peer_oper_freq);
572 }
573
574 p2p_parse_free(&msg);
575
576 p2p_clear_timeout(p2p);
577 p2p_set_state(p2p, P2P_IDLE);
578 p2p->invite_peer = NULL;
579 }
580
581
p2p_invite_send(struct p2p_data * p2p,struct p2p_device * dev,const u8 * go_dev_addr,int dev_pw_id)582 int p2p_invite_send(struct p2p_data *p2p, struct p2p_device *dev,
583 const u8 *go_dev_addr, int dev_pw_id)
584 {
585 struct wpabuf *req;
586 int freq;
587
588 freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq;
589 if (freq <= 0)
590 freq = dev->oob_go_neg_freq;
591 if (freq <= 0) {
592 p2p_dbg(p2p, "No Listen/Operating frequency known for the peer "
593 MACSTR " to send Invitation Request",
594 MAC2STR(dev->info.p2p_device_addr));
595 return -1;
596 }
597
598 req = p2p_build_invitation_req(p2p, dev, go_dev_addr, dev_pw_id);
599 if (req == NULL)
600 return -1;
601 if (p2p->state != P2P_IDLE)
602 p2p_stop_listen_for_freq(p2p, freq);
603 p2p_dbg(p2p, "Sending Invitation Request");
604 p2p_set_state(p2p, P2P_INVITE);
605 p2p->pending_action_state = P2P_PENDING_INVITATION_REQUEST;
606 p2p->invite_peer = dev;
607 dev->invitation_reqs++;
608
609 /* In case of an active P2P GO use a shorter wait time to avoid
610 * issues if not sending out multiple consecutive Beacon frames. */
611 if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr,
612 p2p->cfg->dev_addr, dev->info.p2p_device_addr,
613 wpabuf_head(req), wpabuf_len(req),
614 p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO ?
615 150 : 500) < 0) {
616 p2p_dbg(p2p, "Failed to send Action frame");
617 /* Use P2P find to recover and retry */
618 p2p_set_timeout(p2p, 0, 0);
619 } else {
620 dev->flags |= P2P_DEV_WAIT_INV_REQ_ACK;
621 }
622
623 wpabuf_free(req);
624
625 return 0;
626 }
627
628
p2p_invitation_req_cb(struct p2p_data * p2p,int success)629 void p2p_invitation_req_cb(struct p2p_data *p2p, int success)
630 {
631 p2p_dbg(p2p, "Invitation Request TX callback: success=%d", success);
632
633 if (p2p->invite_peer == NULL) {
634 p2p_dbg(p2p, "No pending Invite");
635 return;
636 }
637
638 if (success)
639 p2p->invite_peer->flags &= ~P2P_DEV_WAIT_INV_REQ_ACK;
640
641 /*
642 * Use P2P find, if needed, to find the other device from its listen
643 * channel.
644 */
645 p2p_set_state(p2p, P2P_INVITE);
646 p2p_set_timeout(p2p, 0, success ? 500000 : 100000);
647 }
648
649
p2p_invitation_resp_cb(struct p2p_data * p2p,int success)650 void p2p_invitation_resp_cb(struct p2p_data *p2p, int success)
651 {
652 p2p_dbg(p2p, "Invitation Response TX callback: success=%d", success);
653 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
654
655 if (!success)
656 p2p_dbg(p2p, "Assume Invitation Response was actually received by the peer even though Ack was not reported");
657
658 if (p2p->cfg->invitation_received) {
659 p2p->cfg->invitation_received(p2p->cfg->cb_ctx,
660 p2p->inv_sa,
661 p2p->inv_group_bssid_ptr,
662 p2p->inv_ssid, p2p->inv_ssid_len,
663 p2p->inv_go_dev_addr,
664 p2p->inv_status,
665 p2p->inv_op_freq);
666 }
667 }
668
669
p2p_invite(struct p2p_data * p2p,const u8 * peer,enum p2p_invite_role role,const u8 * bssid,const u8 * ssid,size_t ssid_len,unsigned int force_freq,const u8 * go_dev_addr,int persistent_group,unsigned int pref_freq,int dev_pw_id)670 int p2p_invite(struct p2p_data *p2p, const u8 *peer, enum p2p_invite_role role,
671 const u8 *bssid, const u8 *ssid, size_t ssid_len,
672 unsigned int force_freq, const u8 *go_dev_addr,
673 int persistent_group, unsigned int pref_freq, int dev_pw_id)
674 {
675 struct p2p_device *dev;
676
677 p2p_dbg(p2p, "Request to invite peer " MACSTR " role=%d persistent=%d "
678 "force_freq=%u allow_6ghz=%d",
679 MAC2STR(peer), role, persistent_group, force_freq,
680 p2p->allow_6ghz);
681 if (bssid)
682 p2p_dbg(p2p, "Invitation for BSSID " MACSTR, MAC2STR(bssid));
683 if (go_dev_addr) {
684 p2p_dbg(p2p, "Invitation for GO Device Address " MACSTR,
685 MAC2STR(go_dev_addr));
686 os_memcpy(p2p->invite_go_dev_addr_buf, go_dev_addr, ETH_ALEN);
687 p2p->invite_go_dev_addr = p2p->invite_go_dev_addr_buf;
688 } else
689 p2p->invite_go_dev_addr = NULL;
690 wpa_hexdump_ascii(MSG_DEBUG, "Invitation for SSID",
691 ssid, ssid_len);
692 if (dev_pw_id >= 0) {
693 p2p_dbg(p2p, "Invitation to use Device Password ID %d",
694 dev_pw_id);
695 }
696 p2p->invite_dev_pw_id = dev_pw_id;
697 p2p->retry_invite_req = role == P2P_INVITE_ROLE_GO &&
698 persistent_group && !force_freq;
699 p2p->retry_invite_req_sent = 0;
700
701 dev = p2p_get_device(p2p, peer);
702 if (dev == NULL || (dev->listen_freq <= 0 && dev->oper_freq <= 0 &&
703 dev->oob_go_neg_freq <= 0)) {
704 p2p_dbg(p2p, "Cannot invite unknown P2P Device " MACSTR,
705 MAC2STR(peer));
706 return -1;
707 }
708
709 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
710 role != P2P_INVITE_ROLE_CLIENT) < 0)
711 return -1;
712
713 if (persistent_group && role == P2P_INVITE_ROLE_CLIENT && !force_freq &&
714 !pref_freq)
715 dev->flags |= P2P_DEV_NO_PREF_CHAN;
716 else
717 dev->flags &= ~P2P_DEV_NO_PREF_CHAN;
718
719 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
720 if (!(dev->info.dev_capab &
721 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
722 p2p_dbg(p2p, "Cannot invite a P2P Device " MACSTR
723 " that is in a group and is not discoverable",
724 MAC2STR(peer));
725 }
726 /* TODO: use device discoverability request through GO */
727 }
728
729 dev->invitation_reqs = 0;
730
731 if (p2p->state != P2P_IDLE)
732 p2p_stop_find(p2p);
733
734 p2p->inv_role = role;
735 p2p->inv_bssid_set = bssid != NULL;
736 if (bssid)
737 os_memcpy(p2p->inv_bssid, bssid, ETH_ALEN);
738 os_memcpy(p2p->inv_ssid, ssid, ssid_len);
739 p2p->inv_ssid_len = ssid_len;
740 p2p->inv_persistent = persistent_group;
741 return p2p_invite_send(p2p, dev, go_dev_addr, dev_pw_id);
742 }
743