p2p_invitation.c revision 44c957860ca714a86357591f39aff0bfa904c743
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 } else if (!(dev->flags & P2P_DEV_FORCE_FREQ) && 326 !p2p->cfg->cfg_op_channel) { 327 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 328 "P2P: Try to reselect channel selection with " 329 "peer information received; " 330 "previously selected op_class %u channel %u", 331 p2p->op_reg_class, p2p->op_channel); 332 p2p_reselect_channel(p2p, &intersection); 333 } 334 335 op_freq = p2p_channel_to_freq(p2p->op_reg_class, 336 p2p->op_channel); 337 if (op_freq < 0) { 338 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 339 "P2P: Unknown operational channel " 340 "(country=%c%c reg_class=%u channel=%u)", 341 p2p->cfg->country[0], p2p->cfg->country[1], 342 p2p->op_reg_class, p2p->op_channel); 343 status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 344 goto fail; 345 } 346 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Selected operating " 347 "channel - %d MHz", op_freq); 348 349 if (status == P2P_SC_SUCCESS) { 350 reg_class = p2p->op_reg_class; 351 channel = p2p->op_channel; 352 channels = &intersection; 353 } 354 } 355 356fail: 357 if (go && status == P2P_SC_SUCCESS && !is_zero_ether_addr(group_bssid)) 358 bssid = group_bssid; 359 else 360 bssid = NULL; 361 resp = p2p_build_invitation_resp(p2p, dev, msg.dialog_token, status, 362 bssid, reg_class, channel, channels); 363 364 if (resp == NULL) 365 goto out; 366 367 if (rx_freq > 0) 368 freq = rx_freq; 369 else 370 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 371 p2p->cfg->channel); 372 if (freq < 0) { 373 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 374 "P2P: Unknown regulatory class/channel"); 375 goto out; 376 } 377 378 /* 379 * Store copy of invitation data to be used when processing TX status 380 * callback for the Acton frame. 381 */ 382 os_memcpy(p2p->inv_sa, sa, ETH_ALEN); 383 if (msg.group_bssid) { 384 os_memcpy(p2p->inv_group_bssid, msg.group_bssid, ETH_ALEN); 385 p2p->inv_group_bssid_ptr = p2p->inv_group_bssid; 386 } else 387 p2p->inv_group_bssid_ptr = NULL; 388 if (msg.group_id_len - ETH_ALEN <= 32) { 389 os_memcpy(p2p->inv_ssid, msg.group_id + ETH_ALEN, 390 msg.group_id_len - ETH_ALEN); 391 p2p->inv_ssid_len = msg.group_id_len - ETH_ALEN; 392 } 393 os_memcpy(p2p->inv_go_dev_addr, msg.group_id, ETH_ALEN); 394 p2p->inv_status = status; 395 p2p->inv_op_freq = op_freq; 396 397 p2p->pending_action_state = P2P_PENDING_INVITATION_RESPONSE; 398 if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr, 399 p2p->cfg->dev_addr, 400 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 401 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 402 "P2P: Failed to send Action frame"); 403 } 404 405out: 406 wpabuf_free(resp); 407 p2p_parse_free(&msg); 408} 409 410 411void p2p_process_invitation_resp(struct p2p_data *p2p, const u8 *sa, 412 const u8 *data, size_t len) 413{ 414 struct p2p_device *dev; 415 struct p2p_message msg; 416 struct p2p_channels intersection, *channels = NULL; 417 418 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 419 "P2P: Received Invitation Response from " MACSTR, 420 MAC2STR(sa)); 421 422 dev = p2p_get_device(p2p, sa); 423 if (dev == NULL) { 424 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 425 "P2P: Ignore Invitation Response from unknown peer " 426 MACSTR, MAC2STR(sa)); 427 return; 428 } 429 430 if (dev != p2p->invite_peer) { 431 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 432 "P2P: Ignore unexpected Invitation Response from peer " 433 MACSTR, MAC2STR(sa)); 434 return; 435 } 436 437 if (p2p_parse(data, len, &msg)) 438 return; 439 440 if (!msg.status) { 441 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 442 "P2P: Mandatory Status attribute missing in " 443 "Invitation Response from " MACSTR, MAC2STR(sa)); 444 p2p_parse_free(&msg); 445 return; 446 } 447 448 if (!msg.channel_list) { 449 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 450 "P2P: Mandatory Channel List attribute missing in " 451 "Invitation Response from " MACSTR, MAC2STR(sa)); 452#ifdef CONFIG_P2P_STRICT 453 p2p_parse_free(&msg); 454 return; 455#endif /* CONFIG_P2P_STRICT */ 456 /* Try to survive without peer channel list */ 457 channels = &p2p->channels; 458 } else if (p2p_peer_channels_check(p2p, &p2p->channels, dev, 459 msg.channel_list, 460 msg.channel_list_len) < 0) { 461 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 462 "P2P: No common channels found"); 463 p2p_parse_free(&msg); 464 return; 465 } else { 466 p2p_channels_intersect(&p2p->channels, &dev->channels, 467 &intersection); 468 channels = &intersection; 469 } 470 471 if (p2p->cfg->invitation_result) 472 p2p->cfg->invitation_result(p2p->cfg->cb_ctx, *msg.status, 473 msg.group_bssid, channels, sa); 474 475 p2p_parse_free(&msg); 476 477 p2p_clear_timeout(p2p); 478 p2p_set_state(p2p, P2P_IDLE); 479 p2p->invite_peer = NULL; 480} 481 482 483int p2p_invite_send(struct p2p_data *p2p, struct p2p_device *dev, 484 const u8 *go_dev_addr) 485{ 486 struct wpabuf *req; 487 int freq; 488 489 freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq; 490 if (freq <= 0) { 491 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 492 "P2P: No Listen/Operating frequency known for the " 493 "peer " MACSTR " to send Invitation Request", 494 MAC2STR(dev->info.p2p_device_addr)); 495 return -1; 496 } 497 498 req = p2p_build_invitation_req(p2p, dev, go_dev_addr); 499 if (req == NULL) 500 return -1; 501 if (p2p->state != P2P_IDLE) 502 p2p_stop_listen_for_freq(p2p, freq); 503 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 504 "P2P: Sending Invitation Request"); 505 p2p_set_state(p2p, P2P_INVITE); 506 p2p->pending_action_state = P2P_PENDING_INVITATION_REQUEST; 507 p2p->invite_peer = dev; 508 dev->invitation_reqs++; 509 if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr, 510 p2p->cfg->dev_addr, dev->info.p2p_device_addr, 511 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 512 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 513 "P2P: Failed to send Action frame"); 514 /* Use P2P find to recover and retry */ 515 p2p_set_timeout(p2p, 0, 0); 516 } 517 518 wpabuf_free(req); 519 520 return 0; 521} 522 523 524void p2p_invitation_req_cb(struct p2p_data *p2p, int success) 525{ 526 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 527 "P2P: Invitation Request TX callback: success=%d", success); 528 529 if (p2p->invite_peer == NULL) { 530 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 531 "P2P: No pending Invite"); 532 return; 533 } 534 535 /* 536 * Use P2P find, if needed, to find the other device from its listen 537 * channel. 538 */ 539 p2p_set_state(p2p, P2P_INVITE); 540#ifdef ANDROID_P2P 541 p2p_set_timeout(p2p, 0, 350000); 542#else 543 p2p_set_timeout(p2p, 0, 100000); 544#endif 545} 546 547 548void p2p_invitation_resp_cb(struct p2p_data *p2p, int success) 549{ 550 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 551 "P2P: Invitation Response TX callback: success=%d", success); 552 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 553 554 if (!success) 555 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 556 "P2P: Assume Invitation Response was actually " 557 "received by the peer even though Ack was not " 558 "reported"); 559 560 if (p2p->cfg->invitation_received) { 561 p2p->cfg->invitation_received(p2p->cfg->cb_ctx, 562 p2p->inv_sa, 563 p2p->inv_group_bssid_ptr, 564 p2p->inv_ssid, p2p->inv_ssid_len, 565 p2p->inv_go_dev_addr, 566 p2p->inv_status, 567 p2p->inv_op_freq); 568 } 569} 570 571 572int p2p_invite(struct p2p_data *p2p, const u8 *peer, enum p2p_invite_role role, 573 const u8 *bssid, const u8 *ssid, size_t ssid_len, 574 unsigned int force_freq, const u8 *go_dev_addr, 575 int persistent_group, unsigned int pref_freq) 576{ 577 struct p2p_device *dev; 578 579 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 580 "P2P: Request to invite peer " MACSTR " role=%d persistent=%d " 581 "force_freq=%u", 582 MAC2STR(peer), role, persistent_group, force_freq); 583 if (bssid) 584 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 585 "P2P: Invitation for BSSID " MACSTR, MAC2STR(bssid)); 586 if (go_dev_addr) { 587 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 588 "P2P: Invitation for GO Device Address " MACSTR, 589 MAC2STR(go_dev_addr)); 590 os_memcpy(p2p->invite_go_dev_addr_buf, go_dev_addr, ETH_ALEN); 591 p2p->invite_go_dev_addr = p2p->invite_go_dev_addr_buf; 592 } else 593 p2p->invite_go_dev_addr = NULL; 594 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Invitation for SSID", 595 ssid, ssid_len); 596 597 dev = p2p_get_device(p2p, peer); 598 if (dev == NULL || (dev->listen_freq <= 0 && dev->oper_freq <= 0)) { 599 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 600 "P2P: Cannot invite unknown P2P Device " MACSTR, 601 MAC2STR(peer)); 602 return -1; 603 } 604 605 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq) < 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 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 618 "P2P: Cannot invite a P2P Device " MACSTR 619 " that is in a group and is not discoverable", 620 MAC2STR(peer)); 621 } 622 /* TODO: use device discoverability request through GO */ 623 } 624 625 dev->invitation_reqs = 0; 626 627 if (p2p->state != P2P_IDLE) 628 p2p_stop_find(p2p); 629 630 p2p->inv_role = role; 631 p2p->inv_bssid_set = bssid != NULL; 632 if (bssid) 633 os_memcpy(p2p->inv_bssid, bssid, ETH_ALEN); 634 os_memcpy(p2p->inv_ssid, ssid, ssid_len); 635 p2p->inv_ssid_len = ssid_len; 636 p2p->inv_persistent = persistent_group; 637 return p2p_invite_send(p2p, dev, go_dev_addr); 638} 639