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 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 } 110 111 112 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 } 182 183 184 void p2p_process_invitation_req(struct p2p_data *p2p, const u8 *sa, 185 const u8 *data, size_t len, int rx_freq) 186 { 187 struct p2p_device *dev; 188 struct p2p_message msg; 189 struct wpabuf *resp = NULL; 190 u8 status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE; 191 int freq; 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; 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 if (resp == NULL) 392 goto out; 393 394 if (rx_freq > 0) 395 freq = rx_freq; 396 else 397 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 398 p2p->cfg->channel); 399 if (freq < 0) { 400 p2p_dbg(p2p, "Unknown regulatory class/channel"); 401 goto out; 402 } 403 404 /* 405 * Store copy of invitation data to be used when processing TX status 406 * callback for the Acton frame. 407 */ 408 os_memcpy(p2p->inv_sa, sa, ETH_ALEN); 409 if (msg.group_bssid) { 410 os_memcpy(p2p->inv_group_bssid, msg.group_bssid, ETH_ALEN); 411 p2p->inv_group_bssid_ptr = p2p->inv_group_bssid; 412 } else 413 p2p->inv_group_bssid_ptr = NULL; 414 if (msg.group_id) { 415 if (msg.group_id_len - ETH_ALEN <= SSID_MAX_LEN) { 416 os_memcpy(p2p->inv_ssid, msg.group_id + ETH_ALEN, 417 msg.group_id_len - ETH_ALEN); 418 p2p->inv_ssid_len = msg.group_id_len - ETH_ALEN; 419 } 420 os_memcpy(p2p->inv_go_dev_addr, msg.group_id, ETH_ALEN); 421 } else { 422 p2p->inv_ssid_len = 0; 423 os_memset(p2p->inv_go_dev_addr, 0, ETH_ALEN); 424 } 425 p2p->inv_status = status; 426 p2p->inv_op_freq = op_freq; 427 428 p2p->pending_action_state = P2P_PENDING_INVITATION_RESPONSE; 429 if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr, 430 p2p->cfg->dev_addr, 431 wpabuf_head(resp), wpabuf_len(resp), 50) < 0) { 432 p2p_dbg(p2p, "Failed to send Action frame"); 433 } 434 435 out: 436 wpabuf_free(resp); 437 p2p_parse_free(&msg); 438 } 439 440 441 void p2p_process_invitation_resp(struct p2p_data *p2p, const u8 *sa, 442 const u8 *data, size_t len) 443 { 444 struct p2p_device *dev; 445 struct p2p_message msg; 446 struct p2p_channels intersection, *channels = NULL; 447 448 p2p_dbg(p2p, "Received Invitation Response from " MACSTR, 449 MAC2STR(sa)); 450 451 dev = p2p_get_device(p2p, sa); 452 if (dev == NULL) { 453 p2p_dbg(p2p, "Ignore Invitation Response from unknown peer " 454 MACSTR, MAC2STR(sa)); 455 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 456 return; 457 } 458 459 if (dev != p2p->invite_peer) { 460 p2p_dbg(p2p, "Ignore unexpected Invitation Response from peer " 461 MACSTR, MAC2STR(sa)); 462 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 463 return; 464 } 465 466 if (p2p_parse(data, len, &msg)) { 467 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 468 return; 469 } 470 471 if (!msg.status) { 472 p2p_dbg(p2p, "Mandatory Status attribute missing in Invitation Response from " 473 MACSTR, MAC2STR(sa)); 474 p2p_parse_free(&msg); 475 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 476 return; 477 } 478 479 /* 480 * We should not really receive a replayed response twice since 481 * duplicate frames are supposed to be dropped. However, not all drivers 482 * do that for pre-association frames. We did not use to verify dialog 483 * token matches for invitation response frames, but that check can be 484 * safely used to drop a replayed response to the previous Invitation 485 * Request in case the suggested operating channel was changed. This 486 * allows a duplicated reject frame to be dropped with the assumption 487 * that the real response follows after it. 488 */ 489 if (*msg.status == P2P_SC_FAIL_NO_COMMON_CHANNELS && 490 p2p->retry_invite_req_sent && 491 msg.dialog_token != dev->dialog_token) { 492 p2p_dbg(p2p, "Unexpected Dialog Token %u (expected %u)", 493 msg.dialog_token, dev->dialog_token); 494 p2p_parse_free(&msg); 495 return; 496 } 497 498 if (*msg.status == P2P_SC_FAIL_NO_COMMON_CHANNELS && 499 p2p->retry_invite_req && 500 p2p_channel_random_social(&p2p->cfg->channels, &p2p->op_reg_class, 501 &p2p->op_channel, NULL, NULL) == 0) { 502 p2p->retry_invite_req = 0; 503 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 504 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 505 p2p_set_state(p2p, P2P_INVITE); 506 p2p_dbg(p2p, "Resend Invitation Request setting op_class %u channel %u as operating channel", 507 p2p->op_reg_class, p2p->op_channel); 508 p2p->retry_invite_req_sent = 1; 509 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 510 p2p->invite_dev_pw_id); 511 p2p_parse_free(&msg); 512 return; 513 } 514 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 515 p2p->retry_invite_req = 0; 516 517 if (!msg.channel_list && *msg.status == P2P_SC_SUCCESS) { 518 p2p_dbg(p2p, "Mandatory Channel List attribute missing in Invitation Response from " 519 MACSTR, MAC2STR(sa)); 520 #ifdef CONFIG_P2P_STRICT 521 p2p_parse_free(&msg); 522 return; 523 #endif /* CONFIG_P2P_STRICT */ 524 /* Try to survive without peer channel list */ 525 channels = &p2p->channels; 526 } else if (!msg.channel_list) { 527 /* Non-success cases are not required to include Channel List */ 528 channels = &p2p->channels; 529 } else if (p2p_peer_channels_check(p2p, &p2p->channels, dev, 530 msg.channel_list, 531 msg.channel_list_len) < 0) { 532 p2p_dbg(p2p, "No common channels found"); 533 p2p_parse_free(&msg); 534 return; 535 } else { 536 p2p_channels_intersect(&p2p->channels, &dev->channels, 537 &intersection); 538 channels = &intersection; 539 } 540 541 if (p2p->cfg->invitation_result) { 542 int peer_oper_freq = 0; 543 int freq = p2p_channel_to_freq(p2p->op_reg_class, 544 p2p->op_channel); 545 if (freq < 0) 546 freq = 0; 547 548 if (msg.operating_channel) { 549 peer_oper_freq = p2p_channel_to_freq( 550 msg.operating_channel[3], 551 msg.operating_channel[4]); 552 if (peer_oper_freq < 0) 553 peer_oper_freq = 0; 554 } 555 556 /* 557 * Use the driver preferred frequency list extension if 558 * supported. 559 */ 560 p2p_check_pref_chan(p2p, 0, dev, &msg); 561 562 p2p->cfg->invitation_result(p2p->cfg->cb_ctx, *msg.status, 563 msg.group_bssid, channels, sa, 564 freq, peer_oper_freq); 565 } 566 567 p2p_parse_free(&msg); 568 569 p2p_clear_timeout(p2p); 570 p2p_set_state(p2p, P2P_IDLE); 571 p2p->invite_peer = NULL; 572 } 573 574 575 int p2p_invite_send(struct p2p_data *p2p, struct p2p_device *dev, 576 const u8 *go_dev_addr, int dev_pw_id) 577 { 578 struct wpabuf *req; 579 int freq; 580 581 freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq; 582 if (freq <= 0) 583 freq = dev->oob_go_neg_freq; 584 if (freq <= 0) { 585 p2p_dbg(p2p, "No Listen/Operating frequency known for the peer " 586 MACSTR " to send Invitation Request", 587 MAC2STR(dev->info.p2p_device_addr)); 588 return -1; 589 } 590 591 req = p2p_build_invitation_req(p2p, dev, go_dev_addr, dev_pw_id); 592 if (req == NULL) 593 return -1; 594 if (p2p->state != P2P_IDLE) 595 p2p_stop_listen_for_freq(p2p, freq); 596 p2p_dbg(p2p, "Sending Invitation Request"); 597 p2p_set_state(p2p, P2P_INVITE); 598 p2p->pending_action_state = P2P_PENDING_INVITATION_REQUEST; 599 p2p->invite_peer = dev; 600 dev->invitation_reqs++; 601 602 /* In case of an active P2P GO use a shorter wait time to avoid 603 * issues if not sending out multiple consecutive Beacon frames. */ 604 if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr, 605 p2p->cfg->dev_addr, dev->info.p2p_device_addr, 606 wpabuf_head(req), wpabuf_len(req), 607 p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO ? 608 150 : 500) < 0) { 609 p2p_dbg(p2p, "Failed to send Action frame"); 610 /* Use P2P find to recover and retry */ 611 p2p_set_timeout(p2p, 0, 0); 612 } else { 613 dev->flags |= P2P_DEV_WAIT_INV_REQ_ACK; 614 } 615 616 wpabuf_free(req); 617 618 return 0; 619 } 620 621 622 void p2p_invitation_req_cb(struct p2p_data *p2p, int success) 623 { 624 p2p_dbg(p2p, "Invitation Request TX callback: success=%d", success); 625 626 if (p2p->invite_peer == NULL) { 627 p2p_dbg(p2p, "No pending Invite"); 628 return; 629 } 630 631 if (success) 632 p2p->invite_peer->flags &= ~P2P_DEV_WAIT_INV_REQ_ACK; 633 634 /* 635 * Use P2P find, if needed, to find the other device from its listen 636 * channel. 637 */ 638 p2p_set_state(p2p, P2P_INVITE); 639 p2p_set_timeout(p2p, 0, success ? 500000 : 100000); 640 } 641 642 643 void p2p_invitation_resp_cb(struct p2p_data *p2p, int success) 644 { 645 p2p_dbg(p2p, "Invitation Response TX callback: success=%d", success); 646 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 647 648 if (!success) 649 p2p_dbg(p2p, "Assume Invitation Response was actually received by the peer even though Ack was not reported"); 650 651 if (p2p->cfg->invitation_received) { 652 p2p->cfg->invitation_received(p2p->cfg->cb_ctx, 653 p2p->inv_sa, 654 p2p->inv_group_bssid_ptr, 655 p2p->inv_ssid, p2p->inv_ssid_len, 656 p2p->inv_go_dev_addr, 657 p2p->inv_status, 658 p2p->inv_op_freq); 659 } 660 } 661 662 663 int p2p_invite(struct p2p_data *p2p, const u8 *peer, enum p2p_invite_role role, 664 const u8 *bssid, const u8 *ssid, size_t ssid_len, 665 unsigned int force_freq, const u8 *go_dev_addr, 666 int persistent_group, unsigned int pref_freq, int dev_pw_id) 667 { 668 struct p2p_device *dev; 669 670 p2p_dbg(p2p, "Request to invite peer " MACSTR " role=%d persistent=%d " 671 "force_freq=%u allow_6ghz=%d", 672 MAC2STR(peer), role, persistent_group, force_freq, 673 p2p->allow_6ghz); 674 if (bssid) 675 p2p_dbg(p2p, "Invitation for BSSID " MACSTR, MAC2STR(bssid)); 676 if (go_dev_addr) { 677 p2p_dbg(p2p, "Invitation for GO Device Address " MACSTR, 678 MAC2STR(go_dev_addr)); 679 os_memcpy(p2p->invite_go_dev_addr_buf, go_dev_addr, ETH_ALEN); 680 p2p->invite_go_dev_addr = p2p->invite_go_dev_addr_buf; 681 } else 682 p2p->invite_go_dev_addr = NULL; 683 wpa_hexdump_ascii(MSG_DEBUG, "Invitation for SSID", 684 ssid, ssid_len); 685 if (dev_pw_id >= 0) { 686 p2p_dbg(p2p, "Invitation to use Device Password ID %d", 687 dev_pw_id); 688 } 689 p2p->invite_dev_pw_id = dev_pw_id; 690 p2p->retry_invite_req = role == P2P_INVITE_ROLE_GO && 691 persistent_group && !force_freq; 692 p2p->retry_invite_req_sent = 0; 693 694 dev = p2p_get_device(p2p, peer); 695 if (dev == NULL || (dev->listen_freq <= 0 && dev->oper_freq <= 0 && 696 dev->oob_go_neg_freq <= 0)) { 697 p2p_dbg(p2p, "Cannot invite unknown P2P Device " MACSTR, 698 MAC2STR(peer)); 699 return -1; 700 } 701 702 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 703 role != P2P_INVITE_ROLE_CLIENT) < 0) 704 return -1; 705 706 if (persistent_group && role == P2P_INVITE_ROLE_CLIENT && !force_freq && 707 !pref_freq) 708 dev->flags |= P2P_DEV_NO_PREF_CHAN; 709 else 710 dev->flags &= ~P2P_DEV_NO_PREF_CHAN; 711 712 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 713 if (!(dev->info.dev_capab & 714 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 715 p2p_dbg(p2p, "Cannot invite a P2P Device " MACSTR 716 " that is in a group and is not discoverable", 717 MAC2STR(peer)); 718 } 719 /* TODO: use device discoverability request through GO */ 720 } 721 722 dev->invitation_reqs = 0; 723 724 if (p2p->state != P2P_IDLE) 725 p2p_stop_find(p2p); 726 727 p2p->inv_role = role; 728 p2p->inv_bssid_set = bssid != NULL; 729 if (bssid) 730 os_memcpy(p2p->inv_bssid, bssid, ETH_ALEN); 731 os_memcpy(p2p->inv_ssid, ssid, ssid_len); 732 p2p->inv_ssid_len = ssid_len; 733 p2p->inv_persistent = persistent_group; 734 return p2p_invite_send(p2p, dev, go_dev_addr, dev_pw_id); 735 } 736
Indexes created Wed Jun 24 00:24:50 UTC 2026