src/p2p/p2p_invitation.c

   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
  17 static 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
  92 static 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
 152 void 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         p2p_dbg(p2p, "Received Invitation Request from " MACSTR " (freq=%d)",
 170                 MAC2STR(sa), rx_freq);
 171
 172         if (p2p_parse(data, len, &msg))
 173                 return;
 174
 175         dev = p2p_get_device(p2p, sa);
 176         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
 177                 p2p_dbg(p2p, "Invitation Request from unknown peer " MACSTR,
 178                         MAC2STR(sa));
 179
 180                 if (p2p_add_device(p2p, sa, rx_freq, NULL, 0, data + 1, len - 1,
 181                                    0)) {
 182                         p2p_dbg(p2p, "Invitation Request add device failed "
 183                                 MACSTR, MAC2STR(sa));
 184                         status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
 185                         goto fail;
 186                 }
 187
 188                 dev = p2p_get_device(p2p, sa);
 189                 if (dev == NULL) {
 190                         p2p_dbg(p2p, "Reject Invitation Request from unknown peer "
 191                                 MACSTR, MAC2STR(sa));
 192                         status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
 193                         goto fail;
 194                 }
 195         }
 196
 197         if (!msg.group_id || !msg.channel_list) {
 198                 p2p_dbg(p2p, "Mandatory attribute missing in Invitation Request from "
 199                         MACSTR, MAC2STR(sa));
 200                 status = P2P_SC_FAIL_INVALID_PARAMS;
 201                 goto fail;
 202         }
 203
 204         if (msg.invitation_flags)
 205                 persistent = *msg.invitation_flags & P2P_INVITATION_FLAGS_TYPE;
 206         else {
 207                 /* Invitation Flags is a mandatory attribute starting from P2P
 208                  * spec 1.06. As a backwards compatibility mechanism, assume
 209                  * the request was for a persistent group if the attribute is
 210                  * missing.
 211                  */
 212                 p2p_dbg(p2p, "Mandatory Invitation Flags attribute missing from Invitation Request");
 213                 persistent = 1;
 214         }
 215
 216         if (p2p_peer_channels_check(p2p, &p2p->cfg->channels, dev,
 217                                     msg.channel_list, msg.channel_list_len) <
 218             0) {
 219                 p2p_dbg(p2p, "No common channels found");
 220                 status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
 221                 goto fail;
 222         }
 223
 224         p2p_channels_intersect(&p2p->cfg->channels, &dev->channels,
 225                                &intersection);
 226
 227         if (p2p->cfg->invitation_process) {
 228                 status = p2p->cfg->invitation_process(
 229                         p2p->cfg->cb_ctx, sa, msg.group_bssid, msg.group_id,
 230                         msg.group_id + ETH_ALEN, msg.group_id_len - ETH_ALEN,
 231                         &go, group_bssid, &op_freq, persistent, &intersection);
 232         }
 233
 234         if (op_freq) {
 235                 p2p_dbg(p2p, "Invitation processing forced frequency %d MHz",
 236                         op_freq);
 237                 if (p2p_freq_to_channel(op_freq, &reg_class, &channel) < 0) {
 238                         p2p_dbg(p2p, "Unknown forced freq %d MHz from invitation_process()",
 239                                 op_freq);
 240                         status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
 241                         goto fail;
 242                 }
 243
 244                 if (!p2p_channels_includes(&intersection, reg_class, channel))
 245                 {
 246                         p2p_dbg(p2p, "forced freq %d MHz not in the supported channels interaction",
 247                                 op_freq);
 248                         status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
 249                         goto fail;
 250                 }
 251
 252                 if (status == P2P_SC_SUCCESS)
 253                         channels = &intersection;
 254         } else {
 255                 p2p_dbg(p2p, "No forced channel from invitation processing - figure out best one to use");
 256
 257                 /* Default to own configuration as a starting point */
 258                 p2p->op_reg_class = p2p->cfg->op_reg_class;
 259                 p2p->op_channel = p2p->cfg->op_channel;
 260                 p2p_dbg(p2p, "Own default op_class %d channel %d",
 261                         p2p->op_reg_class, p2p->op_channel);
 262
 263                 /* Use peer preference if specified and compatible */
 264                 if (msg.operating_channel) {
 265                         int req_freq;
 266                         req_freq = p2p_channel_to_freq(
 267                                 msg.operating_channel[3],
 268                                 msg.operating_channel[4]);
 269                         p2p_dbg(p2p, "Peer operating channel preference: %d MHz",
 270                                 req_freq);
 271                         if (req_freq > 0 &&
 272                             p2p_channels_includes(&intersection,
 273                                                   msg.operating_channel[3],
 274                                                   msg.operating_channel[4])) {
 275                                 p2p->op_reg_class = msg.operating_channel[3];
 276                                 p2p->op_channel = msg.operating_channel[4];
 277                                 p2p_dbg(p2p, "Use peer preference op_class %d channel %d",
 278                                         p2p->op_reg_class, p2p->op_channel);
 279                         } else {
 280                                 p2p_dbg(p2p, "Cannot use peer channel preference");
 281                         }
 282                 }
 283
 284                 if (!p2p_channels_includes(&intersection, p2p->op_reg_class,
 285                                            p2p->op_channel)) {
 286                         p2p_dbg(p2p, "Initially selected channel (op_class %d channel %d) not in channel intersection - try to reselect",
 287                                 p2p->op_reg_class, p2p->op_channel);
 288                         p2p_reselect_channel(p2p, &intersection);
 289                         p2p_dbg(p2p, "Re-selection result: op_class %d channel %d",
 290                                 p2p->op_reg_class, p2p->op_channel);
 291                         if (!p2p_channels_includes(&intersection,
 292                                                    p2p->op_reg_class,
 293                                                    p2p->op_channel)) {
 294                                 p2p_dbg(p2p, "Peer does not support selected operating channel (reg_class=%u channel=%u)",
 295                                         p2p->op_reg_class, p2p->op_channel);
 296                                 status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
 297                                 goto fail;
 298                         }
 299                 } else if (!(dev->flags & P2P_DEV_FORCE_FREQ) &&
 300                            !p2p->cfg->cfg_op_channel) {
 301                         p2p_dbg(p2p, "Try to reselect channel selection with peer information received; previously selected op_class %u channel %u",
 302                                 p2p->op_reg_class, p2p->op_channel);
 303                         p2p_reselect_channel(p2p, &intersection);
 304                 }
 305
 306                 op_freq = p2p_channel_to_freq(p2p->op_reg_class,
 307                                               p2p->op_channel);
 308                 if (op_freq < 0) {
 309                         p2p_dbg(p2p, "Unknown operational channel (country=%c%c reg_class=%u channel=%u)",
 310                                 p2p->cfg->country[0], p2p->cfg->country[1],
 311                                 p2p->op_reg_class, p2p->op_channel);
 312                         status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
 313                         goto fail;
 314                 }
 315                 p2p_dbg(p2p, "Selected operating channel - %d MHz", op_freq);
 316
 317                 if (status == P2P_SC_SUCCESS) {
 318                         reg_class = p2p->op_reg_class;
 319                         channel = p2p->op_channel;
 320                         channels = &intersection;
 321                 }
 322         }
 323
 324 fail:
 325         if (go && status == P2P_SC_SUCCESS && !is_zero_ether_addr(group_bssid))
 326                 bssid = group_bssid;
 327         else
 328                 bssid = NULL;
 329         resp = p2p_build_invitation_resp(p2p, dev, msg.dialog_token, status,
 330                                          bssid, reg_class, channel, channels);
 331
 332         if (resp == NULL)
 333                 goto out;
 334
 335         if (rx_freq > 0)
 336                 freq = rx_freq;
 337         else
 338                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
 339                                            p2p->cfg->channel);
 340         if (freq < 0) {
 341                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 342                 goto out;
 343         }
 344
 345         /*
 346          * Store copy of invitation data to be used when processing TX status
 347          * callback for the Acton frame.
 348          */
 349         os_memcpy(p2p->inv_sa, sa, ETH_ALEN);
 350         if (msg.group_bssid) {
 351                 os_memcpy(p2p->inv_group_bssid, msg.group_bssid, ETH_ALEN);
 352                 p2p->inv_group_bssid_ptr = p2p->inv_group_bssid;
 353         } else
 354                 p2p->inv_group_bssid_ptr = NULL;
 355         if (msg.group_id_len - ETH_ALEN <= 32) {
 356                 os_memcpy(p2p->inv_ssid, msg.group_id + ETH_ALEN,
 357                           msg.group_id_len - ETH_ALEN);
 358                 p2p->inv_ssid_len = msg.group_id_len - ETH_ALEN;
 359         }
 360         os_memcpy(p2p->inv_go_dev_addr, msg.group_id, ETH_ALEN);
 361         p2p->inv_status = status;
 362         p2p->inv_op_freq = op_freq;
 363
 364         p2p->pending_action_state = P2P_PENDING_INVITATION_RESPONSE;
 365         if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr,
 366                             p2p->cfg->dev_addr,
 367                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
 368                 p2p_dbg(p2p, "Failed to send Action frame");
 369         }
 370
 371 out:
 372         wpabuf_free(resp);
 373         p2p_parse_free(&msg);
 374 }
 375
 376
 377 void p2p_process_invitation_resp(struct p2p_data *p2p, const u8 *sa,
 378                                  const u8 *data, size_t len)
 379 {
 380         struct p2p_device *dev;
 381         struct p2p_message msg;
 382         struct p2p_channels intersection, *channels = NULL;
 383
 384         p2p_dbg(p2p, "Received Invitation Response from " MACSTR,
 385                 MAC2STR(sa));
 386
 387         dev = p2p_get_device(p2p, sa);
 388         if (dev == NULL) {
 389                 p2p_dbg(p2p, "Ignore Invitation Response from unknown peer "
 390                         MACSTR, MAC2STR(sa));
 391                 return;
 392         }
 393
 394         if (dev != p2p->invite_peer) {
 395                 p2p_dbg(p2p, "Ignore unexpected Invitation Response from peer "
 396                         MACSTR, MAC2STR(sa));
 397                 return;
 398         }
 399
 400         if (p2p_parse(data, len, &msg))
 401                 return;
 402
 403         if (!msg.status) {
 404                 p2p_dbg(p2p, "Mandatory Status attribute missing in Invitation Response from "
 405                         MACSTR, MAC2STR(sa));
 406                 p2p_parse_free(&msg);
 407                 return;
 408         }
 409
 410         if (!msg.channel_list && *msg.status == P2P_SC_SUCCESS) {
 411                 p2p_dbg(p2p, "Mandatory Channel List attribute missing in Invitation Response from "
 412                         MACSTR, MAC2STR(sa));
 413 #ifdef CONFIG_P2P_STRICT
 414                 p2p_parse_free(&msg);
 415                 return;
 416 #endif /* CONFIG_P2P_STRICT */
 417                 /* Try to survive without peer channel list */
 418                 channels = &p2p->channels;
 419         } else if (!msg.channel_list) {
 420                 /* Non-success cases are not required to include Channel List */
 421                 channels = &p2p->channels;
 422         } else if (p2p_peer_channels_check(p2p, &p2p->channels, dev,
 423                                            msg.channel_list,
 424                                            msg.channel_list_len) < 0) {
 425                 p2p_dbg(p2p, "No common channels found");
 426                 p2p_parse_free(&msg);
 427                 return;
 428         } else {
 429                 p2p_channels_intersect(&p2p->channels, &dev->channels,
 430                                        &intersection);
 431                 channels = &intersection;
 432         }
 433
 434         if (p2p->cfg->invitation_result)
 435                 p2p->cfg->invitation_result(p2p->cfg->cb_ctx, *msg.status,
 436                                             msg.group_bssid, channels, sa);
 437
 438         p2p_parse_free(&msg);
 439
 440         p2p_clear_timeout(p2p);
 441         p2p_set_state(p2p, P2P_IDLE);
 442         p2p->invite_peer = NULL;
 443 }
 444
 445
 446 int p2p_invite_send(struct p2p_data *p2p, struct p2p_device *dev,
 447                     const u8 *go_dev_addr)
 448 {
 449         struct wpabuf *req;
 450         int freq;
 451
 452         freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq;
 453         if (freq <= 0) {
 454                 p2p_dbg(p2p, "No Listen/Operating frequency known for the peer "
 455                         MACSTR " to send Invitation Request",
 456                         MAC2STR(dev->info.p2p_device_addr));
 457                 return -1;
 458         }
 459
 460         req = p2p_build_invitation_req(p2p, dev, go_dev_addr);
 461         if (req == NULL)
 462                 return -1;
 463         if (p2p->state != P2P_IDLE)
 464                 p2p_stop_listen_for_freq(p2p, freq);
 465         p2p_dbg(p2p, "Sending Invitation Request");
 466         p2p_set_state(p2p, P2P_INVITE);
 467         p2p->pending_action_state = P2P_PENDING_INVITATION_REQUEST;
 468         p2p->invite_peer = dev;
 469         dev->invitation_reqs++;
 470         if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr,
 471                             p2p->cfg->dev_addr, dev->info.p2p_device_addr,
 472                             wpabuf_head(req), wpabuf_len(req), 500) < 0) {
 473                 p2p_dbg(p2p, "Failed to send Action frame");
 474                 /* Use P2P find to recover and retry */
 475                 p2p_set_timeout(p2p, 0, 0);
 476         }
 477
 478         wpabuf_free(req);
 479
 480         return 0;
 481 }
 482
 483
 484 void p2p_invitation_req_cb(struct p2p_data *p2p, int success)
 485 {
 486         p2p_dbg(p2p, "Invitation Request TX callback: success=%d", success);
 487
 488         if (p2p->invite_peer == NULL) {
 489                 p2p_dbg(p2p, "No pending Invite");
 490                 return;
 491         }
 492
 493         /*
 494          * Use P2P find, if needed, to find the other device from its listen
 495          * channel.
 496          */
 497         p2p_set_state(p2p, P2P_INVITE);
 498         p2p_set_timeout(p2p, 0, success ? 500000 : 100000);
 499 }
 500
 501
 502 void p2p_invitation_resp_cb(struct p2p_data *p2p, int success)
 503 {
 504         p2p_dbg(p2p, "Invitation Response TX callback: success=%d", success);
 505         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
 506
 507         if (!success)
 508                 p2p_dbg(p2p, "Assume Invitation Response was actually received by the peer even though Ack was not reported");
 509
 510         if (p2p->cfg->invitation_received) {
 511                 p2p->cfg->invitation_received(p2p->cfg->cb_ctx,
 512                                               p2p->inv_sa,
 513                                               p2p->inv_group_bssid_ptr,
 514                                               p2p->inv_ssid, p2p->inv_ssid_len,
 515                                               p2p->inv_go_dev_addr,
 516                                               p2p->inv_status,
 517                                               p2p->inv_op_freq);
 518         }
 519 }
 520
 521
 522 int p2p_invite(struct p2p_data *p2p, const u8 *peer, enum p2p_invite_role role,
 523                const u8 *bssid, const u8 *ssid, size_t ssid_len,
 524                unsigned int force_freq, const u8 *go_dev_addr,
 525                int persistent_group, unsigned int pref_freq)
 526 {
 527         struct p2p_device *dev;
 528
 529         p2p_dbg(p2p, "Request to invite peer " MACSTR " role=%d persistent=%d "
 530                 "force_freq=%u",
 531                 MAC2STR(peer), role, persistent_group, force_freq);
 532         if (bssid)
 533                 p2p_dbg(p2p, "Invitation for BSSID " MACSTR, MAC2STR(bssid));
 534         if (go_dev_addr) {
 535                 p2p_dbg(p2p, "Invitation for GO Device Address " MACSTR,
 536                         MAC2STR(go_dev_addr));
 537                 os_memcpy(p2p->invite_go_dev_addr_buf, go_dev_addr, ETH_ALEN);
 538                 p2p->invite_go_dev_addr = p2p->invite_go_dev_addr_buf;
 539         } else
 540                 p2p->invite_go_dev_addr = NULL;
 541         wpa_hexdump_ascii(MSG_DEBUG, "Invitation for SSID",
 542                           ssid, ssid_len);
 543
 544         dev = p2p_get_device(p2p, peer);
 545         if (dev == NULL || (dev->listen_freq <= 0 && dev->oper_freq <= 0)) {
 546                 p2p_dbg(p2p, "Cannot invite unknown P2P Device " MACSTR,
 547                         MAC2STR(peer));
 548                 return -1;
 549         }
 550
 551         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
 552                                 role != P2P_INVITE_ROLE_CLIENT) < 0)
 553                 return -1;
 554
 555         if (persistent_group && role == P2P_INVITE_ROLE_CLIENT && !force_freq &&
 556             !pref_freq)
 557                 dev->flags |= P2P_DEV_NO_PREF_CHAN;
 558         else
 559                 dev->flags &= ~P2P_DEV_NO_PREF_CHAN;
 560
 561         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
 562                 if (!(dev->info.dev_capab &
 563                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
 564                         p2p_dbg(p2p, "Cannot invite a P2P Device " MACSTR
 565                                 " that is in a group and is not discoverable",
 566                                 MAC2STR(peer));
 567                 }
 568                 /* TODO: use device discoverability request through GO */
 569         }
 570
 571         dev->invitation_reqs = 0;
 572
 573         if (p2p->state != P2P_IDLE)
 574                 p2p_stop_find(p2p);
 575
 576         p2p->inv_role = role;
 577         p2p->inv_bssid_set = bssid != NULL;
 578         if (bssid)
 579                 os_memcpy(p2p->inv_bssid, bssid, ETH_ALEN);
 580         os_memcpy(p2p->inv_ssid, ssid, ssid_len);
 581         p2p->inv_ssid_len = ssid_len;
 582         p2p->inv_persistent = persistent_group;
 583         return p2p_invite_send(p2p, dev, go_dev_addr);
 584 }