p2p_invitation.c revision 4b06059785b935dd1f4f09314e4e12c417d2c6a4
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 "p2p_i.h" 14#include "p2p.h" 15 16 17static struct wpabuf * p2p_build_invitation_req(struct p2p_data *p2p, 18 struct p2p_device *peer, 19 const u8 *go_dev_addr) 20{ 21 struct wpabuf *buf; 22 u8 *len; 23 const u8 *dev_addr; 24 size_t extra = 0; 25 26#ifdef CONFIG_WIFI_DISPLAY 27 struct wpabuf *wfd_ie = p2p->wfd_ie_invitation; 28 if (wfd_ie && p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 29 size_t i; 30 for (i = 0; i < p2p->num_groups; i++) { 31 struct p2p_group *g = p2p->groups[i]; 32 struct wpabuf *ie; 33 if (os_memcmp(p2p_group_get_interface_addr(g), 34 p2p->inv_bssid, ETH_ALEN) != 0) 35 continue; 36 ie = p2p_group_get_wfd_ie(g); 37 if (ie) { 38 wfd_ie = ie; 39 break; 40 } 41 } 42 } 43 if (wfd_ie) 44 extra = wpabuf_len(wfd_ie); 45#endif /* CONFIG_WIFI_DISPLAY */ 46 47 buf = wpabuf_alloc(1000 + extra); 48 if (buf == NULL) 49 return NULL; 50 51 peer->dialog_token++; 52 if (peer->dialog_token == 0) 53 peer->dialog_token = 1; 54 p2p_buf_add_public_action_hdr(buf, P2P_INVITATION_REQ, 55 peer->dialog_token); 56 57 len = p2p_buf_add_ie_hdr(buf); 58 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO || !p2p->inv_persistent) 59 p2p_buf_add_config_timeout(buf, 0, 0); 60 else 61 p2p_buf_add_config_timeout(buf, p2p->go_timeout, 62 p2p->client_timeout); 63 p2p_buf_add_invitation_flags(buf, p2p->inv_persistent ? 64 P2P_INVITATION_FLAGS_TYPE : 0); 65 if (p2p->inv_role != P2P_INVITE_ROLE_CLIENT || 66 !(peer->flags & P2P_DEV_NO_PREF_CHAN)) 67 p2p_buf_add_operating_channel(buf, p2p->cfg->country, 68 p2p->op_reg_class, 69 p2p->op_channel); 70 if (p2p->inv_bssid_set) 71 p2p_buf_add_group_bssid(buf, p2p->inv_bssid); 72 p2p_buf_add_channel_list(buf, p2p->cfg->country, &p2p->channels); 73 if (go_dev_addr) 74 dev_addr = go_dev_addr; 75 else if (p2p->inv_role == P2P_INVITE_ROLE_CLIENT) 76 dev_addr = peer->info.p2p_device_addr; 77 else 78 dev_addr = p2p->cfg->dev_addr; 79 p2p_buf_add_group_id(buf, dev_addr, p2p->inv_ssid, p2p->inv_ssid_len); 80 p2p_buf_add_device_info(buf, p2p, peer); 81 p2p_buf_update_ie_hdr(buf, len); 82 83#ifdef CONFIG_WIFI_DISPLAY 84 if (wfd_ie) 85 wpabuf_put_buf(buf, wfd_ie); 86#endif /* CONFIG_WIFI_DISPLAY */ 87 88 return buf; 89} 90 91 92static struct wpabuf * p2p_build_invitation_resp(struct p2p_data *p2p, 93 struct p2p_device *peer, 94 u8 dialog_token, u8 status, 95 const u8 *group_bssid, 96 u8 reg_class, u8 channel, 97 struct p2p_channels *channels) 98{ 99 struct wpabuf *buf; 100 u8 *len; 101 size_t extra = 0; 102 103#ifdef CONFIG_WIFI_DISPLAY 104 struct wpabuf *wfd_ie = p2p->wfd_ie_invitation; 105 if (wfd_ie && group_bssid) { 106 size_t i; 107 for (i = 0; i < p2p->num_groups; i++) { 108 struct p2p_group *g = p2p->groups[i]; 109 struct wpabuf *ie; 110 if (os_memcmp(p2p_group_get_interface_addr(g), 111 group_bssid, ETH_ALEN) != 0) 112 continue; 113 ie = p2p_group_get_wfd_ie(g); 114 if (ie) { 115 wfd_ie = ie; 116 break; 117 } 118 } 119 } 120 if (wfd_ie) 121 extra = wpabuf_len(wfd_ie); 122#endif /* CONFIG_WIFI_DISPLAY */ 123 124 buf = wpabuf_alloc(1000 + extra); 125 if (buf == NULL) 126 return NULL; 127 128 p2p_buf_add_public_action_hdr(buf, P2P_INVITATION_RESP, 129 dialog_token); 130 131 len = p2p_buf_add_ie_hdr(buf); 132 p2p_buf_add_status(buf, status); 133 p2p_buf_add_config_timeout(buf, 0, 0); /* FIX */ 134 if (reg_class && channel) 135 p2p_buf_add_operating_channel(buf, p2p->cfg->country, 136 reg_class, channel); 137 if (group_bssid) 138 p2p_buf_add_group_bssid(buf, group_bssid); 139 if (channels) 140 p2p_buf_add_channel_list(buf, p2p->cfg->country, channels); 141 p2p_buf_update_ie_hdr(buf, len); 142 143#ifdef CONFIG_WIFI_DISPLAY 144 if (wfd_ie) 145 wpabuf_put_buf(buf, wfd_ie); 146#endif /* CONFIG_WIFI_DISPLAY */ 147 148 return buf; 149} 150 151 152void p2p_process_invitation_req(struct p2p_data *p2p, const u8 *sa, 153 const u8 *data, size_t len, int rx_freq) 154{ 155 struct p2p_device *dev; 156 struct p2p_message msg; 157 struct wpabuf *resp = NULL; 158 u8 status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE; 159 int freq; 160 int go = 0; 161 u8 group_bssid[ETH_ALEN], *bssid; 162 int op_freq = 0; 163 u8 reg_class = 0, channel = 0; 164 struct p2p_channels intersection, *channels = NULL; 165 int persistent; 166 167 os_memset(group_bssid, 0, sizeof(group_bssid)); 168 169 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 170 "P2P: Received Invitation Request from " MACSTR " (freq=%d)", 171 MAC2STR(sa), rx_freq); 172 173 if (p2p_parse(data, len, &msg)) 174 return; 175 176 dev = p2p_get_device(p2p, sa); 177 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 178 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 179 "P2P: Invitation Request from unknown peer " 180 MACSTR, MAC2STR(sa)); 181 182 if (p2p_add_device(p2p, sa, rx_freq, NULL, 0, data + 1, len - 1, 183 0)) { 184 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 185 "P2P: Invitation Request add device failed " 186 MACSTR, MAC2STR(sa)); 187 status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE; 188 goto fail; 189 } 190 191 dev = p2p_get_device(p2p, sa); 192 if (dev == NULL) { 193 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 194 "P2P: Reject Invitation Request from unknown " 195 "peer " MACSTR, MAC2STR(sa)); 196 status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE; 197 goto fail; 198 } 199 } 200 201 if (!msg.group_id || !msg.channel_list) { 202 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 203 "P2P: Mandatory attribute missing in Invitation " 204 "Request from " MACSTR, MAC2STR(sa)); 205 status = P2P_SC_FAIL_INVALID_PARAMS; 206 goto fail; 207 } 208 209 if (msg.invitation_flags) 210 persistent = *msg.invitation_flags & P2P_INVITATION_FLAGS_TYPE; 211 else { 212 /* Invitation Flags is a mandatory attribute starting from P2P 213 * spec 1.06. As a backwards compatibility mechanism, assume 214 * the request was for a persistent group if the attribute is 215 * missing. 216 */ 217 wpa_printf(MSG_DEBUG, "P2P: Mandatory Invitation Flags " 218 "attribute missing from Invitation Request"); 219 persistent = 1; 220 } 221 222 if (p2p_peer_channels_check(p2p, &p2p->cfg->channels, dev, 223 msg.channel_list, msg.channel_list_len) < 224 0) { 225 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 226 "P2P: No common channels found"); 227 status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 228 goto fail; 229 } 230 231 if (p2p->cfg->invitation_process) { 232 status = p2p->cfg->invitation_process( 233 p2p->cfg->cb_ctx, sa, msg.group_bssid, msg.group_id, 234 msg.group_id + ETH_ALEN, msg.group_id_len - ETH_ALEN, 235 &go, group_bssid, &op_freq, persistent); 236 } 237 238 if (op_freq) { 239 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Invitation " 240 "processing forced frequency %d MHz", op_freq); 241 if (p2p_freq_to_channel(op_freq, ®_class, &channel) < 0) { 242 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 243 "P2P: Unknown forced freq %d MHz from " 244 "invitation_process()", op_freq); 245 status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 246 goto fail; 247 } 248 249 p2p_channels_intersect(&p2p->cfg->channels, &dev->channels, 250 &intersection); 251 if (!p2p_channels_includes(&intersection, reg_class, channel)) 252 { 253 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 254 "P2P: forced freq %d MHz not in the supported " 255 "channels interaction", op_freq); 256 status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 257 goto fail; 258 } 259 260 if (status == P2P_SC_SUCCESS) 261 channels = &intersection; 262 } else { 263 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 264 "P2P: No forced channel from invitation processing - " 265 "figure out best one to use"); 266 267 p2p_channels_intersect(&p2p->cfg->channels, &dev->channels, 268 &intersection); 269 /* Default to own configuration as a starting point */ 270 p2p->op_reg_class = p2p->cfg->op_reg_class; 271 p2p->op_channel = p2p->cfg->op_channel; 272 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Own default " 273 "op_class %d channel %d", 274 p2p->op_reg_class, p2p->op_channel); 275 276 /* Use peer preference if specified and compatible */ 277 if (msg.operating_channel) { 278 int req_freq; 279 req_freq = p2p_channel_to_freq( 280 msg.operating_channel[3], 281 msg.operating_channel[4]); 282 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " 283 "operating channel preference: %d MHz", 284 req_freq); 285 if (req_freq > 0 && 286 p2p_channels_includes(&intersection, 287 msg.operating_channel[3], 288 msg.operating_channel[4])) { 289 p2p->op_reg_class = msg.operating_channel[3]; 290 p2p->op_channel = msg.operating_channel[4]; 291 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 292 "P2P: Use peer preference op_class %d " 293 "channel %d", 294 p2p->op_reg_class, p2p->op_channel); 295 } else { 296 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 297 "P2P: Cannot use peer channel " 298 "preference"); 299 } 300 } 301 302 if (!p2p_channels_includes(&intersection, p2p->op_reg_class, 303 p2p->op_channel)) { 304 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 305 "P2P: Initially selected channel (op_class %d " 306 "channel %d) not in channel intersection - try " 307 "to reselect", 308 p2p->op_reg_class, p2p->op_channel); 309 p2p_reselect_channel(p2p, &intersection); 310 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 311 "P2P: Re-selection result: op_class %d " 312 "channel %d", 313 p2p->op_reg_class, p2p->op_channel); 314 if (!p2p_channels_includes(&intersection, 315 p2p->op_reg_class, 316 p2p->op_channel)) { 317 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 318 "P2P: Peer does not support selected " 319 "operating channel (reg_class=%u " 320 "channel=%u)", 321 p2p->op_reg_class, p2p->op_channel); 322 status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 323 goto fail; 324 } 325 } 326 327 op_freq = p2p_channel_to_freq(p2p->op_reg_class, 328 p2p->op_channel); 329 if (op_freq < 0) { 330 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 331 "P2P: Unknown operational channel " 332 "(country=%c%c reg_class=%u channel=%u)", 333 p2p->cfg->country[0], p2p->cfg->country[1], 334 p2p->op_reg_class, p2p->op_channel); 335 status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 336 goto fail; 337 } 338 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Selected operating " 339 "channel - %d MHz", op_freq); 340 341 if (status == P2P_SC_SUCCESS) { 342 reg_class = p2p->op_reg_class; 343 channel = p2p->op_channel; 344 channels = &intersection; 345 } 346 } 347 348fail: 349 if (go && status == P2P_SC_SUCCESS && !is_zero_ether_addr(group_bssid)) 350 bssid = group_bssid; 351 else 352 bssid = NULL; 353 resp = p2p_build_invitation_resp(p2p, dev, msg.dialog_token, status, 354 bssid, reg_class, channel, channels); 355 356 if (resp == NULL) 357 goto out; 358 359 if (rx_freq > 0) 360 freq = rx_freq; 361 else 362 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 363 p2p->cfg->channel); 364 if (freq < 0) { 365 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 366 "P2P: Unknown regulatory class/channel"); 367 goto out; 368 } 369 370 /* 371 * Store copy of invitation data to be used when processing TX status 372 * callback for the Acton frame. 373 */ 374 os_memcpy(p2p->inv_sa, sa, ETH_ALEN); 375 if (msg.group_bssid) { 376 os_memcpy(p2p->inv_group_bssid, msg.group_bssid, ETH_ALEN); 377 p2p->inv_group_bssid_ptr = p2p->inv_group_bssid; 378 } else 379 p2p->inv_group_bssid_ptr = NULL; 380 if (msg.group_id_len - ETH_ALEN <= 32) { 381 os_memcpy(p2p->inv_ssid, msg.group_id + ETH_ALEN, 382 msg.group_id_len - ETH_ALEN); 383 p2p->inv_ssid_len = msg.group_id_len - ETH_ALEN; 384 } 385 os_memcpy(p2p->inv_go_dev_addr, msg.group_id, ETH_ALEN); 386 p2p->inv_status = status; 387 p2p->inv_op_freq = op_freq; 388 389 p2p->pending_action_state = P2P_PENDING_INVITATION_RESPONSE; 390 if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr, 391 p2p->cfg->dev_addr, 392 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 393 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 394 "P2P: Failed to send Action frame"); 395 } 396 397out: 398 wpabuf_free(resp); 399 p2p_parse_free(&msg); 400} 401 402 403void p2p_process_invitation_resp(struct p2p_data *p2p, const u8 *sa, 404 const u8 *data, size_t len) 405{ 406 struct p2p_device *dev; 407 struct p2p_message msg; 408 struct p2p_channels intersection, *channels = NULL; 409 410 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 411 "P2P: Received Invitation Response from " MACSTR, 412 MAC2STR(sa)); 413 414 dev = p2p_get_device(p2p, sa); 415 if (dev == NULL) { 416 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 417 "P2P: Ignore Invitation Response from unknown peer " 418 MACSTR, MAC2STR(sa)); 419 return; 420 } 421 422 if (dev != p2p->invite_peer) { 423 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 424 "P2P: Ignore unexpected Invitation Response from peer " 425 MACSTR, MAC2STR(sa)); 426 return; 427 } 428 429 if (p2p_parse(data, len, &msg)) 430 return; 431 432 if (!msg.status) { 433 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 434 "P2P: Mandatory Status attribute missing in " 435 "Invitation Response from " MACSTR, MAC2STR(sa)); 436 p2p_parse_free(&msg); 437 return; 438 } 439 440 if (!msg.channel_list) { 441 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 442 "P2P: Mandatory Channel List attribute missing in " 443 "Invitation Response from " MACSTR, MAC2STR(sa)); 444#ifdef CONFIG_P2P_STRICT 445 p2p_parse_free(&msg); 446 return; 447#endif /* CONFIG_P2P_STRICT */ 448 /* Try to survive without peer channel list */ 449 channels = &p2p->channels; 450 } else if (p2p_peer_channels_check(p2p, &p2p->channels, dev, 451 msg.channel_list, 452 msg.channel_list_len) < 0) { 453 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 454 "P2P: No common channels found"); 455 p2p_parse_free(&msg); 456 return; 457 } else { 458 p2p_channels_intersect(&p2p->channels, &dev->channels, 459 &intersection); 460 channels = &intersection; 461 } 462 463 if (p2p->cfg->invitation_result) 464 p2p->cfg->invitation_result(p2p->cfg->cb_ctx, *msg.status, 465 msg.group_bssid, channels, sa); 466 467 p2p_parse_free(&msg); 468 469 p2p_clear_timeout(p2p); 470 p2p_set_state(p2p, P2P_IDLE); 471 p2p->invite_peer = NULL; 472} 473 474 475int p2p_invite_send(struct p2p_data *p2p, struct p2p_device *dev, 476 const u8 *go_dev_addr) 477{ 478 struct wpabuf *req; 479 int freq; 480 481 freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq; 482 if (freq <= 0) { 483 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 484 "P2P: No Listen/Operating frequency known for the " 485 "peer " MACSTR " to send Invitation Request", 486 MAC2STR(dev->info.p2p_device_addr)); 487 return -1; 488 } 489 490 req = p2p_build_invitation_req(p2p, dev, go_dev_addr); 491 if (req == NULL) 492 return -1; 493 if (p2p->state != P2P_IDLE) 494 p2p_stop_listen_for_freq(p2p, freq); 495 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 496 "P2P: Sending Invitation Request"); 497 p2p_set_state(p2p, P2P_INVITE); 498 p2p->pending_action_state = P2P_PENDING_INVITATION_REQUEST; 499 p2p->invite_peer = dev; 500 dev->invitation_reqs++; 501 if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr, 502 p2p->cfg->dev_addr, dev->info.p2p_device_addr, 503 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 504 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 505 "P2P: Failed to send Action frame"); 506 /* Use P2P find to recover and retry */ 507 p2p_set_timeout(p2p, 0, 0); 508 } 509 510 wpabuf_free(req); 511 512 return 0; 513} 514 515 516void p2p_invitation_req_cb(struct p2p_data *p2p, int success) 517{ 518 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 519 "P2P: Invitation Request TX callback: success=%d", success); 520 521 if (p2p->invite_peer == NULL) { 522 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 523 "P2P: No pending Invite"); 524 return; 525 } 526 527 /* 528 * Use P2P find, if needed, to find the other device from its listen 529 * channel. 530 */ 531 p2p_set_state(p2p, P2P_INVITE); 532#ifdef ANDROID_P2P 533 p2p_set_timeout(p2p, 0, 350000); 534#else 535 p2p_set_timeout(p2p, 0, 100000); 536#endif 537} 538 539 540void p2p_invitation_resp_cb(struct p2p_data *p2p, int success) 541{ 542 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 543 "P2P: Invitation Response TX callback: success=%d", success); 544 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 545 546 if (!success) 547 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 548 "P2P: Assume Invitation Response was actually " 549 "received by the peer even though Ack was not " 550 "reported"); 551 552 if (p2p->cfg->invitation_received) { 553 p2p->cfg->invitation_received(p2p->cfg->cb_ctx, 554 p2p->inv_sa, 555 p2p->inv_group_bssid_ptr, 556 p2p->inv_ssid, p2p->inv_ssid_len, 557 p2p->inv_go_dev_addr, 558 p2p->inv_status, 559 p2p->inv_op_freq); 560 } 561} 562 563 564int p2p_invite(struct p2p_data *p2p, const u8 *peer, enum p2p_invite_role role, 565 const u8 *bssid, const u8 *ssid, size_t ssid_len, 566 unsigned int force_freq, const u8 *go_dev_addr, 567 int persistent_group, unsigned int pref_freq) 568{ 569 struct p2p_device *dev; 570 571 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 572 "P2P: Request to invite peer " MACSTR " role=%d persistent=%d " 573 "force_freq=%u", 574 MAC2STR(peer), role, persistent_group, force_freq); 575 if (bssid) 576 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 577 "P2P: Invitation for BSSID " MACSTR, MAC2STR(bssid)); 578 if (go_dev_addr) { 579 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 580 "P2P: Invitation for GO Device Address " MACSTR, 581 MAC2STR(go_dev_addr)); 582 os_memcpy(p2p->invite_go_dev_addr_buf, go_dev_addr, ETH_ALEN); 583 p2p->invite_go_dev_addr = p2p->invite_go_dev_addr_buf; 584 } else 585 p2p->invite_go_dev_addr = NULL; 586 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Invitation for SSID", 587 ssid, ssid_len); 588 589 dev = p2p_get_device(p2p, peer); 590 if (dev == NULL || (dev->listen_freq <= 0 && dev->oper_freq <= 0)) { 591 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 592 "P2P: Cannot invite unknown P2P Device " MACSTR, 593 MAC2STR(peer)); 594 return -1; 595 } 596 597 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq) < 0) 598 return -1; 599 600 if (persistent_group && role == P2P_INVITE_ROLE_CLIENT && !force_freq && 601 !pref_freq) 602 dev->flags |= P2P_DEV_NO_PREF_CHAN; 603 else 604 dev->flags &= ~P2P_DEV_NO_PREF_CHAN; 605 606 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 607 if (!(dev->info.dev_capab & 608 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 609 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 610 "P2P: Cannot invite a P2P Device " MACSTR 611 " that is in a group and is not discoverable", 612 MAC2STR(peer)); 613 } 614 /* TODO: use device discoverability request through GO */ 615 } 616 617 dev->invitation_reqs = 0; 618 619 if (p2p->state != P2P_IDLE) 620 p2p_stop_find(p2p); 621 622 p2p->inv_role = role; 623 p2p->inv_bssid_set = bssid != NULL; 624 if (bssid) 625 os_memcpy(p2p->inv_bssid, bssid, ETH_ALEN); 626 os_memcpy(p2p->inv_ssid, ssid, ssid_len); 627 p2p->inv_ssid_len = ssid_len; 628 p2p->inv_persistent = persistent_group; 629 return p2p_invite_send(p2p, dev, go_dev_addr); 630} 631