src/p2p/p2p_go_neg.c

   1 /*
   2  * Wi-Fi Direct - P2P Group Owner Negotiation
   3  * Copyright (c) 2009-2010, Atheros Communications
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "common/ieee802_11_defs.h"
  19 #include "wps/wps_defs.h"
  20 #include "p2p_i.h"
  21 #include "p2p.h"
  22
  23
  24 static int p2p_go_det(u8 own_intent, u8 peer_value)
  25 {
  26         u8 peer_intent = peer_value >> 1;
  27         if (own_intent == peer_intent) {
  28                 if (own_intent == P2P_MAX_GO_INTENT)
  29                         return -1; /* both devices want to become GO */
  30
  31                 /* Use tie breaker bit to determine GO */
  32                 return (peer_value & 0x01) ? 0 : 1;
  33         }
  34
  35         return own_intent > peer_intent;
  36 }
  37
  38
  39 int p2p_peer_channels_check(struct p2p_data *p2p, struct p2p_channels *own,
  40                             struct p2p_device *dev,
  41                             const u8 *channel_list, size_t channel_list_len)
  42 {
  43         const u8 *pos, *end;
  44         struct p2p_channels *ch;
  45         size_t channels;
  46         struct p2p_channels intersection;
  47
  48         ch = &dev->channels;
  49         os_memset(ch, 0, sizeof(*ch));
  50         pos = channel_list;
  51         end = channel_list + channel_list_len;
  52
  53         if (end - pos < 3)
  54                 return -1;
  55         os_memcpy(dev->country, pos, 3);
  56         wpa_hexdump_ascii(MSG_DEBUG, "P2P: Peer country", pos, 3);
  57         if (pos[2] != 0x04 && os_memcmp(pos, p2p->cfg->country, 2) != 0) {
  58                 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO,
  59                         "P2P: Mismatching country (ours=%c%c peer's=%c%c)",
  60                         p2p->cfg->country[0], p2p->cfg->country[1],
  61                         pos[0], pos[1]);
  62                 return -1;
  63         }
  64         pos += 3;
  65
  66         while (pos + 2 < end) {
  67                 struct p2p_reg_class *cl = &ch->reg_class[ch->reg_classes];
  68                 cl->reg_class = *pos++;
  69                 if (pos + 1 + pos[0] > end) {
  70                         wpa_msg(p2p->cfg->msg_ctx, MSG_INFO,
  71                                 "P2P: Invalid peer Channel List");
  72                         return -1;
  73                 }
  74                 channels = *pos++;
  75                 cl->channels = channels > P2P_MAX_REG_CLASS_CHANNELS ?
  76                         P2P_MAX_REG_CLASS_CHANNELS : channels;
  77                 os_memcpy(cl->channel, pos, cl->channels);
  78                 pos += channels;
  79                 ch->reg_classes++;
  80                 if (ch->reg_classes == P2P_MAX_REG_CLASSES)
  81                         break;
  82         }
  83
  84         p2p_channels_intersect(own, &dev->channels, &intersection);
  85         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Own reg_classes %d "
  86                 "peer reg_classes %d intersection reg_classes %d",
  87                 (int) own->reg_classes,
  88                 (int) dev->channels.reg_classes,
  89                 (int) intersection.reg_classes);
  90         if (intersection.reg_classes == 0) {
  91                 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO,
  92                         "P2P: No common channels found");
  93                 return -1;
  94         }
  95         return 0;
  96 }
  97
  98
  99 static int p2p_peer_channels(struct p2p_data *p2p, struct p2p_device *dev,
 100                              const u8 *channel_list, size_t channel_list_len)
 101 {
 102         return p2p_peer_channels_check(p2p, &p2p->channels, dev,
 103                                        channel_list, channel_list_len);
 104 }
 105
 106
 107 static u16 p2p_wps_method_pw_id(enum p2p_wps_method wps_method)
 108 {
 109         switch (wps_method) {
 110         case WPS_PIN_LABEL:
 111                 return DEV_PW_DEFAULT;
 112         case WPS_PIN_DISPLAY:
 113                 return DEV_PW_REGISTRAR_SPECIFIED;
 114         case WPS_PIN_KEYPAD:
 115                 return DEV_PW_USER_SPECIFIED;
 116         case WPS_PBC:
 117                 return DEV_PW_PUSHBUTTON;
 118         default:
 119                 return DEV_PW_DEFAULT;
 120         }
 121 }
 122
 123
 124 static const char * p2p_wps_method_str(enum p2p_wps_method wps_method)
 125 {
 126         switch (wps_method) {
 127         case WPS_PIN_LABEL:
 128                 return "Label";
 129         case WPS_PIN_DISPLAY:
 130                 return "Display";
 131         case WPS_PIN_KEYPAD:
 132                 return "Keypad";
 133         case WPS_PBC:
 134                 return "PBC";
 135         default:
 136                 return "??";
 137         }
 138 }
 139
 140
 141 static struct wpabuf * p2p_build_go_neg_req(struct p2p_data *p2p,
 142                                             struct p2p_device *peer)
 143 {
 144         struct wpabuf *buf;
 145         u8 *len;
 146         u8 group_capab;
 147
 148         buf = wpabuf_alloc(1000);
 149         if (buf == NULL)
 150                 return NULL;
 151
 152         peer->dialog_token++;
 153         if (peer->dialog_token == 0)
 154                 peer->dialog_token = 1;
 155         p2p_buf_add_public_action_hdr(buf, P2P_GO_NEG_REQ, peer->dialog_token);
 156
 157         len = p2p_buf_add_ie_hdr(buf);
 158         group_capab = 0;
 159         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP)
 160                 group_capab |= P2P_GROUP_CAPAB_PERSISTENT_GROUP;
 161         if (p2p->cross_connect)
 162                 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
 163         p2p_buf_add_capability(buf, p2p->dev_capab, group_capab);
 164         p2p_buf_add_go_intent(buf, (p2p->go_intent << 1) |
 165                               p2p->next_tie_breaker);
 166         p2p->next_tie_breaker = !p2p->next_tie_breaker;
 167         p2p_buf_add_config_timeout(buf, 100, 20);
 168         p2p_buf_add_listen_channel(buf, p2p->cfg->country, p2p->cfg->reg_class,
 169                                    p2p->cfg->channel);
 170         if (p2p->ext_listen_interval)
 171                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
 172                                               p2p->ext_listen_interval);
 173         p2p_buf_add_intended_addr(buf, p2p->intended_addr);
 174         p2p_buf_add_channel_list(buf, p2p->cfg->country, &p2p->channels);
 175         p2p_buf_add_device_info(buf, p2p, peer);
 176         p2p_buf_add_operating_channel(buf, p2p->cfg->country,
 177                                       p2p->op_reg_class, p2p->op_channel);
 178         p2p_buf_update_ie_hdr(buf, len);
 179
 180         /* WPS IE with Device Password ID attribute */
 181         p2p_build_wps_ie(p2p, buf, p2p_wps_method_pw_id(peer->wps_method), 0);
 182
 183         return buf;
 184 }
 185
 186
 187 int p2p_connect_send(struct p2p_data *p2p, struct p2p_device *dev)
 188 {
 189         struct wpabuf *req;
 190         int freq;
 191
 192         freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq;
 193         if (freq <= 0) {
 194                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 195                         "P2P: No Listen/Operating frequency known for the "
 196                         "peer " MACSTR " to send GO Negotiation Request",
 197                         MAC2STR(dev->p2p_device_addr));
 198                 return -1;
 199         }
 200
 201         req = p2p_build_go_neg_req(p2p, dev);
 202         if (req == NULL)
 203                 return -1;
 204         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 205                 "P2P: Sending GO Negotiation Request");
 206         p2p_set_state(p2p, P2P_CONNECT);
 207         p2p->pending_action_state = P2P_PENDING_GO_NEG_REQUEST;
 208         p2p->go_neg_peer = dev;
 209         dev->flags |= P2P_DEV_WAIT_GO_NEG_RESPONSE;
 210         if (p2p->cfg->send_action(p2p->cfg->cb_ctx, freq,
 211                                   dev->p2p_device_addr, p2p->cfg->dev_addr,
 212                                   dev->p2p_device_addr,
 213                                   wpabuf_head(req), wpabuf_len(req), 200) < 0)
 214         {
 215                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 216                         "P2P: Failed to send Action frame");
 217                 /* Use P2P find to recover and retry */
 218                 p2p_set_timeout(p2p, 0, 0);
 219         }
 220
 221         wpabuf_free(req);
 222
 223         return 0;
 224 }
 225
 226
 227 static struct wpabuf * p2p_build_go_neg_resp(struct p2p_data *p2p,
 228                                              struct p2p_device *peer,
 229                                              u8 dialog_token, u8 status,
 230                                              u8 tie_breaker)
 231 {
 232         struct wpabuf *buf;
 233         u8 *len;
 234         u8 group_capab;
 235
 236         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 237                 "P2P: Building GO Negotiation Response");
 238         buf = wpabuf_alloc(1000);
 239         if (buf == NULL)
 240                 return NULL;
 241
 242         p2p_buf_add_public_action_hdr(buf, P2P_GO_NEG_RESP, dialog_token);
 243
 244         len = p2p_buf_add_ie_hdr(buf);
 245         p2p_buf_add_status(buf, status);
 246         group_capab = 0;
 247         if (peer && peer->go_state == LOCAL_GO) {
 248                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP)
 249                         group_capab |= P2P_GROUP_CAPAB_PERSISTENT_GROUP;
 250                 if (p2p->cross_connect)
 251                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
 252         }
 253         p2p_buf_add_capability(buf, p2p->dev_capab, group_capab);
 254         p2p_buf_add_go_intent(buf, (p2p->go_intent << 1) | tie_breaker);
 255         p2p_buf_add_config_timeout(buf, 100, 20);
 256         if (peer && peer->go_state == REMOTE_GO) {
 257                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Omit Operating "
 258                         "Channel attribute");
 259         } else {
 260                 p2p_buf_add_operating_channel(buf, p2p->cfg->country,
 261                                               p2p->op_reg_class,
 262                                               p2p->op_channel);
 263         }
 264         p2p_buf_add_intended_addr(buf, p2p->intended_addr);
 265         if (status || peer == NULL) {
 266                 p2p_buf_add_channel_list(buf, p2p->cfg->country,
 267                                          &p2p->channels);
 268         } else if (peer->go_state == REMOTE_GO) {
 269                 p2p_buf_add_channel_list(buf, p2p->cfg->country,
 270                                          &p2p->channels);
 271         } else {
 272                 struct p2p_channels res;
 273                 p2p_channels_intersect(&p2p->channels, &peer->channels,
 274                                        &res);
 275                 p2p_buf_add_channel_list(buf, p2p->cfg->country, &res);
 276         }
 277         p2p_buf_add_device_info(buf, p2p, peer);
 278         if (peer && peer->go_state == LOCAL_GO) {
 279                 p2p_buf_add_group_id(buf, p2p->cfg->dev_addr, p2p->ssid,
 280                                      p2p->ssid_len);
 281         }
 282         p2p_buf_update_ie_hdr(buf, len);
 283
 284         /* WPS IE with Device Password ID attribute */
 285         p2p_build_wps_ie(p2p, buf,
 286                          p2p_wps_method_pw_id(peer ? peer->wps_method :
 287                                               WPS_NOT_READY), 0);
 288
 289         return buf;
 290 }
 291
 292
 293 void p2p_process_go_neg_req(struct p2p_data *p2p, const u8 *sa,
 294                             const u8 *data, size_t len, int rx_freq)
 295 {
 296         struct p2p_device *dev = NULL;
 297         struct wpabuf *resp;
 298         struct p2p_message msg;
 299         u8 status = P2P_SC_FAIL_INVALID_PARAMS;
 300         int tie_breaker = 0;
 301         int freq;
 302
 303         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 304                 "P2P: Received GO Negotiation Request from " MACSTR
 305                 "(freq=%d)", MAC2STR(sa), rx_freq);
 306
 307         if (p2p_parse(data, len, &msg))
 308                 return;
 309
 310         if (!msg.capability) {
 311                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 312                         "P2P: Mandatory Capability attribute missing from GO "
 313                         "Negotiation Request");
 314 #ifdef CONFIG_P2P_STRICT
 315                 goto fail;
 316 #endif /* CONFIG_P2P_STRICT */
 317         }
 318
 319         if (msg.go_intent)
 320                 tie_breaker = *msg.go_intent & 0x01;
 321         else {
 322                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 323                         "P2P: Mandatory GO Intent attribute missing from GO "
 324                         "Negotiation Request");
 325 #ifdef CONFIG_P2P_STRICT
 326                 goto fail;
 327 #endif /* CONFIG_P2P_STRICT */
 328         }
 329
 330         if (!msg.config_timeout) {
 331                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 332                         "P2P: Mandatory Configuration Timeout attribute "
 333                         "missing from GO Negotiation Request");
 334 #ifdef CONFIG_P2P_STRICT
 335                 goto fail;
 336 #endif /* CONFIG_P2P_STRICT */
 337         }
 338
 339         if (!msg.listen_channel) {
 340                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 341                         "P2P: No Listen Channel attribute received");
 342                 goto fail;
 343         }
 344         if (!msg.operating_channel) {
 345                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 346                         "P2P: No Operating Channel attribute received");
 347                 goto fail;
 348         }
 349         if (!msg.channel_list) {
 350                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 351                         "P2P: No Channel List attribute received");
 352                 goto fail;
 353         }
 354         if (!msg.intended_addr) {
 355                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 356                         "P2P: No Intended P2P Interface Address attribute "
 357                         "received");
 358                 goto fail;
 359         }
 360         if (!msg.p2p_device_info) {
 361                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 362                         "P2P: No P2P Device Info attribute received");
 363                 goto fail;
 364         }
 365
 366         if (os_memcmp(msg.p2p_device_addr, sa, ETH_ALEN) != 0) {
 367                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 368                         "P2P: Unexpected GO Negotiation Request SA=" MACSTR
 369                         " != dev_addr=" MACSTR,
 370                         MAC2STR(sa), MAC2STR(msg.p2p_device_addr));
 371                 goto fail;
 372         }
 373
 374         dev = p2p_get_device(p2p, sa);
 375
 376         if (msg.status && *msg.status) {
 377                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 378                         "P2P: Unexpected Status attribute (%d) in GO "
 379                         "Negotiation Request", *msg.status);
 380                 goto fail;
 381         }
 382
 383         if (dev == NULL)
 384                 dev = p2p_add_dev_from_go_neg_req(p2p, sa, &msg);
 385         else if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
 386                 p2p_add_dev_info(p2p, sa, dev, &msg);
 387         if (dev && dev->flags & P2P_DEV_USER_REJECTED) {
 388                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 389                         "P2P: User has rejected this peer");
 390                 status = P2P_SC_FAIL_REJECTED_BY_USER;
 391         } else if (dev == NULL || dev->wps_method == WPS_NOT_READY) {
 392                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 393                         "P2P: Not ready for GO negotiation with " MACSTR,
 394                         MAC2STR(sa));
 395                 status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
 396                 if (dev)
 397                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
 398                 p2p->cfg->go_neg_req_rx(p2p->cfg->cb_ctx, sa,
 399                                         msg.dev_password_id);
 400         } else if (p2p->go_neg_peer && p2p->go_neg_peer != dev) {
 401                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 402                         "P2P: Already in Group Formation with another peer");
 403                 status = P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE;
 404         } else {
 405                 int go;
 406
 407                 if (!p2p->go_neg_peer) {
 408                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting "
 409                                 "GO Negotiation with previously authorized "
 410                                 "peer");
 411                         if (!(dev->flags & P2P_DEV_FORCE_FREQ)) {
 412                                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 413                                         "P2P: Use default channel settings");
 414                                 p2p->op_reg_class = p2p->cfg->op_reg_class;
 415                                 p2p->op_channel = p2p->cfg->op_channel;
 416                                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
 417                                           sizeof(struct p2p_channels));
 418                         } else {
 419                                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 420                                         "P2P: Use previously configured "
 421                                         "forced channel settings");
 422                         }
 423                 }
 424
 425                 dev->flags &= ~P2P_DEV_NOT_YET_READY;
 426
 427                 if (!msg.go_intent) {
 428                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 429                                 "P2P: No GO Intent attribute received");
 430                         goto fail;
 431                 }
 432                 if ((*msg.go_intent >> 1) > P2P_MAX_GO_INTENT) {
 433                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 434                                 "P2P: Invalid GO Intent value (%u) received",
 435                                 *msg.go_intent >> 1);
 436                         goto fail;
 437                 }
 438
 439                 if (dev->go_neg_req_sent &&
 440                     os_memcmp(sa, p2p->cfg->dev_addr, ETH_ALEN) > 0) {
 441                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 442                                 "P2P: Do not reply since peer has higher "
 443                                 "address and GO Neg Request already sent");
 444                         p2p_parse_free(&msg);
 445                         return;
 446                 }
 447
 448                 go = p2p_go_det(p2p->go_intent, *msg.go_intent);
 449                 if (go < 0) {
 450                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 451                                 "P2P: Incompatible GO Intent");
 452                         status = P2P_SC_FAIL_BOTH_GO_INTENT_15;
 453                         goto fail;
 454                 }
 455
 456                 if (p2p_peer_channels(p2p, dev, msg.channel_list,
 457                                       msg.channel_list_len) < 0) {
 458                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 459                                 "P2P: No common channels found");
 460                         status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
 461                         goto fail;
 462                 }
 463
 464                 switch (msg.dev_password_id) {
 465                 case DEV_PW_DEFAULT:
 466                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 467                                 "P2P: PIN from peer Label");
 468                         if (dev->wps_method != WPS_PIN_KEYPAD) {
 469                                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 470                                         "P2P: We have wps_method=%s -> "
 471                                         "incompatible",
 472                                         p2p_wps_method_str(dev->wps_method));
 473                                 status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD;
 474                                 goto fail;
 475                         }
 476                         break;
 477                 case DEV_PW_REGISTRAR_SPECIFIED:
 478                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 479                                 "P2P: PIN from peer Display");
 480                         if (dev->wps_method != WPS_PIN_KEYPAD) {
 481                                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 482                                         "P2P: We have wps_method=%s -> "
 483                                         "incompatible",
 484                                         p2p_wps_method_str(dev->wps_method));
 485                                 status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD;
 486                                 goto fail;
 487                         }
 488                         break;
 489                 case DEV_PW_USER_SPECIFIED:
 490                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 491                                 "P2P: Peer entered PIN on Keypad");
 492                         if (dev->wps_method != WPS_PIN_LABEL &&
 493                             dev->wps_method != WPS_PIN_DISPLAY) {
 494                                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 495                                         "P2P: We have wps_method=%s -> "
 496                                         "incompatible",
 497                                         p2p_wps_method_str(dev->wps_method));
 498                                 status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD;
 499                                 goto fail;
 500                         }
 501                         break;
 502                 case DEV_PW_PUSHBUTTON:
 503                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 504                                 "P2P: Peer using pushbutton");
 505                         if (dev->wps_method != WPS_PBC) {
 506                                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 507                                         "P2P: We have wps_method=%s -> "
 508                                         "incompatible",
 509                                         p2p_wps_method_str(dev->wps_method));
 510                                 status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD;
 511                                 goto fail;
 512                         }
 513                         break;
 514                 default:
 515                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 516                                 "P2P: Unsupported Device Password ID %d",
 517                                 msg.dev_password_id);
 518                         status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD;
 519                         goto fail;
 520                 }
 521
 522                 if (go) {
 523                         struct p2p_channels intersection;
 524                         size_t i;
 525                         p2p_channels_intersect(&p2p->channels, &dev->channels,
 526                                                &intersection);
 527                         if (intersection.reg_classes == 0 ||
 528                             intersection.reg_class[0].channels == 0) {
 529                                 status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
 530                                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 531                                         "P2P: No common channels found");
 532                                 goto fail;
 533                         }
 534                         for (i = 0; i < intersection.reg_classes; i++) {
 535                                 struct p2p_reg_class *c;
 536                                 c = &intersection.reg_class[i];
 537                                 wpa_printf(MSG_DEBUG, "P2P: reg_class %u",
 538                                            c->reg_class);
 539                                 wpa_hexdump(MSG_DEBUG, "P2P: channels",
 540                                             c->channel, c->channels);
 541                         }
 542                         if (!p2p_channels_includes(&intersection,
 543                                                    p2p->op_reg_class,
 544                                                    p2p->op_channel)) {
 545                                 struct p2p_reg_class *cl;
 546                                 cl = &intersection.reg_class[0];
 547                                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 548                                         "P2P: Selected operating channel "
 549                                         "(reg_class %u channel %u) not "
 550                                         "acceptable to the peer - pick "
 551                                         "another channel (reg_class %u "
 552                                         "channel %u)",
 553                                         p2p->op_reg_class, p2p->op_channel,
 554                                         cl->reg_class, cl->channel[0]);
 555                                 p2p->op_reg_class = cl->reg_class;
 556                                 p2p->op_channel = cl->channel[0];
 557                         }
 558
 559                         p2p_build_ssid(p2p, p2p->ssid, &p2p->ssid_len);
 560                 }
 561
 562                 dev->go_state = go ? LOCAL_GO : REMOTE_GO;
 563                 dev->oper_freq = p2p_channel_to_freq((const char *)
 564                                                      msg.operating_channel,
 565                                                      msg.operating_channel[3],
 566                                                      msg.operating_channel[4]);
 567                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer operating "
 568                         "channel preference: %d MHz", dev->oper_freq);
 569
 570                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 571                         "P2P: GO Negotiation with " MACSTR, MAC2STR(sa));
 572                 if (p2p->state != P2P_IDLE)
 573                         p2p_stop_find(p2p);
 574                 p2p_set_state(p2p, P2P_GO_NEG);
 575                 p2p_clear_timeout(p2p);
 576                 dev->dialog_token = msg.dialog_token;
 577                 os_memcpy(dev->intended_addr, msg.intended_addr, ETH_ALEN);
 578                 p2p->go_neg_peer = dev;
 579                 status = P2P_SC_SUCCESS;
 580         }
 581
 582 fail:
 583         resp = p2p_build_go_neg_resp(p2p, dev, msg.dialog_token, status,
 584                                      !tie_breaker);
 585         p2p_parse_free(&msg);
 586         if (resp == NULL)
 587                 return;
 588         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 589                 "P2P: Sending GO Negotiation Response");
 590         if (rx_freq > 0)
 591                 freq = rx_freq;
 592         else
 593                 freq = p2p_channel_to_freq(p2p->cfg->country,
 594                                            p2p->cfg->reg_class,
 595                                            p2p->cfg->channel);
 596         if (freq < 0) {
 597                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 598                         "P2P: Unknown regulatory class/channel");
 599                 wpabuf_free(resp);
 600                 return;
 601         }
 602         if (status == P2P_SC_SUCCESS) {
 603                 p2p->pending_action_state = P2P_PENDING_GO_NEG_RESPONSE;
 604                 dev->flags |= P2P_DEV_WAIT_GO_NEG_CONFIRM;
 605         } else
 606                 p2p->pending_action_state =
 607                         P2P_PENDING_GO_NEG_RESPONSE_FAILURE;
 608         if (p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, sa,
 609                                   p2p->cfg->dev_addr, p2p->cfg->dev_addr,
 610                                   wpabuf_head(resp), wpabuf_len(resp), 200) <
 611             0) {
 612                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 613                         "P2P: Failed to send Action frame");
 614         }
 615
 616         wpabuf_free(resp);
 617 }
 618
 619
 620 static struct wpabuf * p2p_build_go_neg_conf(struct p2p_data *p2p,
 621                                              struct p2p_device *peer,
 622                                              u8 dialog_token, u8 status,
 623                                              const u8 *resp_chan, int go)
 624 {
 625         struct wpabuf *buf;
 626         u8 *len;
 627         struct p2p_channels res;
 628         u8 group_capab;
 629
 630         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 631                 "P2P: Building GO Negotiation Confirm");
 632         buf = wpabuf_alloc(1000);
 633         if (buf == NULL)
 634                 return NULL;
 635
 636         p2p_buf_add_public_action_hdr(buf, P2P_GO_NEG_CONF, dialog_token);
 637
 638         len = p2p_buf_add_ie_hdr(buf);
 639         p2p_buf_add_status(buf, status);
 640         group_capab = 0;
 641         if (peer->go_state == LOCAL_GO) {
 642                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP)
 643                         group_capab |= P2P_GROUP_CAPAB_PERSISTENT_GROUP;
 644                 if (p2p->cross_connect)
 645                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
 646         }
 647         p2p_buf_add_capability(buf, p2p->dev_capab, group_capab);
 648         if (go || resp_chan == NULL)
 649                 p2p_buf_add_operating_channel(buf, p2p->cfg->country,
 650                                               p2p->op_reg_class,
 651                                               p2p->op_channel);
 652         else
 653                 p2p_buf_add_operating_channel(buf, (const char *) resp_chan,
 654                                               resp_chan[3], resp_chan[4]);
 655         p2p_channels_intersect(&p2p->channels, &peer->channels, &res);
 656         p2p_buf_add_channel_list(buf, p2p->cfg->country, &res);
 657         if (go) {
 658                 p2p_buf_add_group_id(buf, p2p->cfg->dev_addr, p2p->ssid,
 659                                      p2p->ssid_len);
 660         }
 661         p2p_buf_update_ie_hdr(buf, len);
 662
 663         return buf;
 664 }
 665
 666
 667 void p2p_process_go_neg_resp(struct p2p_data *p2p, const u8 *sa,
 668                              const u8 *data, size_t len, int rx_freq)
 669 {
 670         struct p2p_device *dev;
 671         struct wpabuf *conf;
 672         int go = -1;
 673         struct p2p_message msg;
 674         u8 status = P2P_SC_SUCCESS;
 675         int freq;
 676
 677         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 678                 "P2P: Received GO Negotiation Response from " MACSTR
 679                 " (freq=%d)", MAC2STR(sa), rx_freq);
 680         dev = p2p_get_device(p2p, sa);
 681         if (dev == NULL || dev->wps_method == WPS_NOT_READY ||
 682             dev != p2p->go_neg_peer) {
 683                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 684                         "P2P: Not ready for GO negotiation with " MACSTR,
 685                         MAC2STR(sa));
 686                 return;
 687         }
 688
 689         if (p2p_parse(data, len, &msg))
 690                 return;
 691
 692         if (!(dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE)) {
 693                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 694                         "P2P: Was not expecting GO Negotiation Response - "
 695                         "ignore");
 696                 p2p_parse_free(&msg);
 697                 return;
 698         }
 699         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
 700
 701         if (msg.dialog_token != dev->dialog_token) {
 702                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 703                         "P2P: Unexpected Dialog Token %u (expected %u)",
 704                         msg.dialog_token, dev->dialog_token);
 705                 p2p_parse_free(&msg);
 706                 return;
 707         }
 708
 709         if (!msg.status) {
 710                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 711                         "P2P: No Status attribute received");
 712                 status = P2P_SC_FAIL_INVALID_PARAMS;
 713                 goto fail;
 714         }
 715         if (*msg.status) {
 716                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 717                         "P2P: GO Negotiation rejected: status %d",
 718                         *msg.status);
 719                 dev->go_neg_req_sent = 0;
 720                 if (*msg.status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) {
 721                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 722                                 "P2P: Wait for the peer to become ready for "
 723                                 "GO Negotiation");
 724                         dev->flags |= P2P_DEV_NOT_YET_READY;
 725                         dev->wait_count = 0;
 726                         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
 727                         p2p_set_timeout(p2p, 0, 0);
 728                 } else {
 729                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 730                                 "P2P: Stop GO Negotiation attempt");
 731                         p2p_go_neg_failed(p2p, dev, *msg.status);
 732                 }
 733                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
 734                 p2p_parse_free(&msg);
 735                 return;
 736         }
 737
 738         if (!msg.capability) {
 739                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 740                         "P2P: Mandatory Capability attribute missing from GO "
 741                         "Negotiation Response");
 742 #ifdef CONFIG_P2P_STRICT
 743                 status = P2P_SC_FAIL_INVALID_PARAMS;
 744                 goto fail;
 745 #endif /* CONFIG_P2P_STRICT */
 746         }
 747
 748         if (!msg.p2p_device_info) {
 749                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 750                         "P2P: Mandatory P2P Device Info attribute missing "
 751                         "from GO Negotiation Response");
 752 #ifdef CONFIG_P2P_STRICT
 753                 status = P2P_SC_FAIL_INVALID_PARAMS;
 754                 goto fail;
 755 #endif /* CONFIG_P2P_STRICT */
 756         }
 757
 758         if (!msg.intended_addr) {
 759                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 760                         "P2P: No Intended P2P Interface Address attribute "
 761                         "received");
 762                 status = P2P_SC_FAIL_INVALID_PARAMS;
 763                 goto fail;
 764         }
 765
 766         if (!msg.go_intent) {
 767                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 768                         "P2P: No GO Intent attribute received");
 769                 status = P2P_SC_FAIL_INVALID_PARAMS;
 770                 goto fail;
 771         }
 772         if ((*msg.go_intent >> 1) > P2P_MAX_GO_INTENT) {
 773                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 774                         "P2P: Invalid GO Intent value (%u) received",
 775                         *msg.go_intent >> 1);
 776                 status = P2P_SC_FAIL_INVALID_PARAMS;
 777                 goto fail;
 778         }
 779
 780         go = p2p_go_det(p2p->go_intent, *msg.go_intent);
 781         if (go < 0) {
 782                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 783                         "P2P: Incompatible GO Intent");
 784                 status = P2P_SC_FAIL_INCOMPATIBLE_PARAMS;
 785                 goto fail;
 786         }
 787
 788         if (!go && msg.group_id) {
 789                 /* TODO: Store SSID for Provisioning step */
 790         } else if (!go) {
 791                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 792                         "P2P: Mandatory P2P Group ID attribute missing from "
 793                         "GO Negotiation Response");
 794 #ifdef CONFIG_P2P_STRICT
 795                 status = P2P_SC_FAIL_INVALID_PARAMS;
 796                 goto fail;
 797 #endif /* CONFIG_P2P_STRICT */
 798         }
 799
 800         if (!msg.config_timeout) {
 801                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 802                         "P2P: Mandatory Configuration Timeout attribute "
 803                         "missing from GO Negotiation Response");
 804 #ifdef CONFIG_P2P_STRICT
 805                 status = P2P_SC_FAIL_INVALID_PARAMS;
 806                 goto fail;
 807 #endif /* CONFIG_P2P_STRICT */
 808         }
 809
 810         if (!msg.operating_channel && !go) {
 811                 /*
 812                  * Note: P2P Client may omit Operating Channel attribute to
 813                  * indicate it does not have a preference.
 814                  */
 815                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 816                         "P2P: No Operating Channel attribute received");
 817                 status = P2P_SC_FAIL_INVALID_PARAMS;
 818                 goto fail;
 819         }
 820         if (!msg.channel_list) {
 821                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 822                         "P2P: No Channel List attribute received");
 823                 status = P2P_SC_FAIL_INVALID_PARAMS;
 824                 goto fail;
 825         }
 826
 827         if (p2p_peer_channels(p2p, dev, msg.channel_list,
 828                               msg.channel_list_len) < 0) {
 829                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 830                         "P2P: No common channels found");
 831                 status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
 832                 goto fail;
 833         }
 834
 835         if (msg.operating_channel) {
 836                 dev->oper_freq = p2p_channel_to_freq((const char *)
 837                                                      msg.operating_channel,
 838                                                      msg.operating_channel[3],
 839                                                      msg.operating_channel[4]);
 840                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer operating "
 841                         "channel preference: %d MHz", dev->oper_freq);
 842         } else
 843                 dev->oper_freq = 0;
 844
 845         switch (msg.dev_password_id) {
 846         case DEV_PW_DEFAULT:
 847                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 848                         "P2P: PIN from peer Label");
 849                 if (dev->wps_method != WPS_PIN_KEYPAD) {
 850                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 851                                 "P2P: We have wps_method=%s -> "
 852                                 "incompatible",
 853                                 p2p_wps_method_str(dev->wps_method));
 854                         status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD;
 855                         goto fail;
 856                 }
 857                 break;
 858         case DEV_PW_REGISTRAR_SPECIFIED:
 859                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 860                         "P2P: PIN from peer Display");
 861                 if (dev->wps_method != WPS_PIN_KEYPAD) {
 862                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 863                                 "P2P: We have wps_method=%s -> "
 864                                 "incompatible",
 865                                 p2p_wps_method_str(dev->wps_method));
 866                         status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD;
 867                         goto fail;
 868                 }
 869                 break;
 870         case DEV_PW_USER_SPECIFIED:
 871                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 872                         "P2P: Peer entered PIN on Keypad");
 873                 if (dev->wps_method != WPS_PIN_LABEL &&
 874                     dev->wps_method != WPS_PIN_DISPLAY) {
 875                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 876                                 "P2P: We have wps_method=%s -> "
 877                                 "incompatible",
 878                                 p2p_wps_method_str(dev->wps_method));
 879                         status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD;
 880                         goto fail;
 881                 }
 882                 break;
 883         case DEV_PW_PUSHBUTTON:
 884                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 885                         "P2P: Peer using pushbutton");
 886                 if (dev->wps_method != WPS_PBC) {
 887                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 888                                 "P2P: We have wps_method=%s -> "
 889                                 "incompatible",
 890                                 p2p_wps_method_str(dev->wps_method));
 891                         status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD;
 892                         goto fail;
 893                 }
 894                 break;
 895         default:
 896                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 897                         "P2P: Unsupported Device Password ID %d",
 898                         msg.dev_password_id);
 899                 status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD;
 900                 goto fail;
 901         }
 902
 903         if (go) {
 904                 struct p2p_channels intersection;
 905                 size_t i;
 906                 p2p_channels_intersect(&p2p->channels, &dev->channels,
 907                                        &intersection);
 908                 if (intersection.reg_classes == 0 ||
 909                     intersection.reg_class[0].channels == 0) {
 910                         status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
 911                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 912                                 "P2P: No common channels found");
 913                         goto fail;
 914                 }
 915                 for (i = 0; i < intersection.reg_classes; i++) {
 916                         struct p2p_reg_class *c;
 917                         c = &intersection.reg_class[i];
 918                         wpa_printf(MSG_DEBUG, "P2P: reg_class %u",
 919                                    c->reg_class);
 920                         wpa_hexdump(MSG_DEBUG, "P2P: channels",
 921                                     c->channel, c->channels);
 922                 }
 923                 if (!p2p_channels_includes(&intersection, p2p->op_reg_class,
 924                                            p2p->op_channel)) {
 925                         struct p2p_reg_class *cl;
 926                         cl = &intersection.reg_class[0];
 927                         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 928                                 "P2P: Selected operating channel "
 929                                 "(reg_class %u channel %u) not "
 930                                 "acceptable to the peer - pick "
 931                                 "another channel (reg_class %u "
 932                                 "channel %u)",
 933                                 p2p->op_reg_class, p2p->op_channel,
 934                                 cl->reg_class, cl->channel[0]);
 935                         p2p->op_reg_class = cl->reg_class;
 936                         p2p->op_channel = cl->channel[0];
 937                 }
 938
 939                 p2p_build_ssid(p2p, p2p->ssid, &p2p->ssid_len);
 940         }
 941
 942         p2p_set_state(p2p, P2P_GO_NEG);
 943         p2p_clear_timeout(p2p);
 944
 945         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 946                 "P2P: GO Negotiation with " MACSTR, MAC2STR(sa));
 947         os_memcpy(dev->intended_addr, msg.intended_addr, ETH_ALEN);
 948
 949 fail:
 950         conf = p2p_build_go_neg_conf(p2p, dev, msg.dialog_token, status,
 951                                      msg.operating_channel, go);
 952         p2p_parse_free(&msg);
 953         if (conf == NULL)
 954                 return;
 955         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 956                 "P2P: Sending GO Negotiation Confirm");
 957         if (status == P2P_SC_SUCCESS) {
 958                 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
 959                 dev->go_state = go ? LOCAL_GO : REMOTE_GO;
 960         } else
 961                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
 962         if (rx_freq > 0)
 963                 freq = rx_freq;
 964         else
 965                 freq = dev->listen_freq;
 966         if (p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, sa,
 967                                   p2p->cfg->dev_addr, sa,
 968                                   wpabuf_head(conf), wpabuf_len(conf), 200) <
 969             0) {
 970                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 971                         "P2P: Failed to send Action frame");
 972                 p2p_go_neg_failed(p2p, dev, -1);
 973         }
 974         wpabuf_free(conf);
 975 }
 976
 977
 978 void p2p_process_go_neg_conf(struct p2p_data *p2p, const u8 *sa,
 979                              const u8 *data, size_t len)
 980 {
 981         struct p2p_device *dev;
 982         struct p2p_message msg;
 983
 984         wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 985                 "P2P: Received GO Negotiation Confirm from " MACSTR,
 986                 MAC2STR(sa));
 987         dev = p2p_get_device(p2p, sa);
 988         if (dev == NULL || dev->wps_method == WPS_NOT_READY ||
 989             dev != p2p->go_neg_peer) {
 990                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 991                         "P2P: Not ready for GO negotiation with " MACSTR,
 992                         MAC2STR(sa));
 993                 return;
 994         }
 995
 996         if (p2p->pending_action_state == P2P_PENDING_GO_NEG_RESPONSE) {
 997                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Stopped waiting "
 998                         "for TX status on GO Negotiation Response since we "
 999                         "already received Confirmation");
1000                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
1001         }
1002
1003         if (p2p_parse(data, len, &msg))
1004                 return;
1005
1006         if (!(dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
1007                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1008                         "P2P: Was not expecting GO Negotiation Confirm - "
1009                         "ignore");
1010                 return;
1011         }
1012         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1013
1014         if (msg.dialog_token != dev->dialog_token) {
1015                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1016                         "P2P: Unexpected Dialog Token %u (expected %u)",
1017                         msg.dialog_token, dev->dialog_token);
1018                 p2p_parse_free(&msg);
1019                 return;
1020         }
1021
1022         if (!msg.status) {
1023                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1024                         "P2P: No Status attribute received");
1025                 p2p_parse_free(&msg);
1026                 return;
1027         }
1028         if (*msg.status) {
1029                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1030                         "P2P: GO Negotiation rejected: status %d",
1031                         *msg.status);
1032                 p2p_parse_free(&msg);
1033                 return;
1034         }
1035
1036         if (dev->go_state == REMOTE_GO && msg.group_id) {
1037                 /* TODO: Store SSID for Provisioning step */
1038         } else if (dev->go_state == REMOTE_GO) {
1039                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1040                         "P2P: Mandatory P2P Group ID attribute missing from "
1041                         "GO Negotiation Confirmation");
1042 #ifdef CONFIG_P2P_STRICT
1043                 p2p_parse_free(&msg);
1044                 return;
1045 #endif /* CONFIG_P2P_STRICT */
1046         }
1047
1048         if (!msg.operating_channel) {
1049                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1050                         "P2P: Mandatory Operating Channel attribute missing "
1051                         "from GO Negotiation Confirmation");
1052 #ifdef CONFIG_P2P_STRICT
1053                 p2p_parse_free(&msg);
1054                 return;
1055 #endif /* CONFIG_P2P_STRICT */
1056         }
1057
1058         if (!msg.channel_list) {
1059                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1060                         "P2P: Mandatory Operating Channel attribute missing "
1061                         "from GO Negotiation Confirmation");
1062 #ifdef CONFIG_P2P_STRICT
1063                 p2p_parse_free(&msg);
1064                 return;
1065 #endif /* CONFIG_P2P_STRICT */
1066         }
1067
1068         p2p_parse_free(&msg);
1069
1070         if (dev->go_state == UNKNOWN_GO) {
1071                 /*
1072                  * This should not happen since GO negotiation has already
1073                  * been completed.
1074                  */
1075                 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
1076                         "P2P: Unexpected GO Neg state - do not know which end "
1077                         "becomes GO");
1078                 return;
1079         }
1080
1081         p2p_go_complete(p2p, dev);
1082 }