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