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