wpa_supplicant/mesh.c

   1 /*
   2  * WPA Supplicant - Basic mesh mode routines
   3  * Copyright (c) 2013-2014, cozybit, Inc.  All rights reserved.
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "utils/uuid.h"
  14 #include "common/ieee802_11_defs.h"
  15 #include "common/wpa_ctrl.h"
  16 #include "ap/sta_info.h"
  17 #include "ap/hostapd.h"
  18 #include "ap/ieee802_11.h"
  19 #include "config_ssid.h"
  20 #include "config.h"
  21 #include "wpa_supplicant_i.h"
  22 #include "driver_i.h"
  23 #include "notify.h"
  24 #include "ap.h"
  25 #include "mesh_mpm.h"
  26 #include "mesh_rsn.h"
  27 #include "mesh.h"
  28
  29
  30 static void wpa_supplicant_mesh_deinit(struct wpa_supplicant *wpa_s)
  31 {
  32         wpa_supplicant_mesh_iface_deinit(wpa_s, wpa_s->ifmsh);
  33         wpa_s->ifmsh = NULL;
  34         wpa_s->current_ssid = NULL;
  35         os_free(wpa_s->mesh_rsn);
  36         wpa_s->mesh_rsn = NULL;
  37         /* TODO: leave mesh (stop beacon). This will happen on link down
  38          * anyway, so it's not urgent */
  39 }
  40
  41
  42 void wpa_supplicant_mesh_iface_deinit(struct wpa_supplicant *wpa_s,
  43                                       struct hostapd_iface *ifmsh)
  44 {
  45         if (!ifmsh)
  46                 return;
  47
  48         if (ifmsh->mconf) {
  49                 mesh_mpm_deinit(wpa_s, ifmsh);
  50                 if (ifmsh->mconf->rsn_ie) {
  51                         ifmsh->mconf->rsn_ie = NULL;
  52                         /* We cannot free this struct
  53                          * because wpa_authenticator on
  54                          * hostapd side is also using it
  55                          * for now just set to NULL and
  56                          * let hostapd code free it.
  57                          */
  58                 }
  59                 os_free(ifmsh->mconf);
  60                 ifmsh->mconf = NULL;
  61         }
  62
  63         /* take care of shared data */
  64         hostapd_interface_deinit(ifmsh);
  65         hostapd_interface_free(ifmsh);
  66 }
  67
  68
  69 static struct mesh_conf * mesh_config_create(struct wpa_supplicant *wpa_s,
  70                                              struct wpa_ssid *ssid)
  71 {
  72         struct mesh_conf *conf;
  73         int cipher;
  74
  75         conf = os_zalloc(sizeof(struct mesh_conf));
  76         if (!conf)
  77                 return NULL;
  78
  79         os_memcpy(conf->meshid, ssid->ssid, ssid->ssid_len);
  80         conf->meshid_len = ssid->ssid_len;
  81
  82         if (ssid->key_mgmt & WPA_KEY_MGMT_SAE)
  83                 conf->security |= MESH_CONF_SEC_AUTH |
  84                         MESH_CONF_SEC_AMPE;
  85         else
  86                 conf->security |= MESH_CONF_SEC_NONE;
  87 #ifdef CONFIG_IEEE80211W
  88         conf->ieee80211w = ssid->ieee80211w;
  89         if (conf->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT) {
  90                 if (wpa_s->drv_enc & WPA_DRIVER_CAPA_ENC_BIP)
  91                         conf->ieee80211w = wpa_s->conf->pmf;
  92                 else
  93                         conf->ieee80211w = NO_MGMT_FRAME_PROTECTION;
  94         }
  95 #endif /* CONFIG_IEEE80211W */
  96
  97         cipher = wpa_pick_pairwise_cipher(ssid->pairwise_cipher, 0);
  98         if (cipher < 0 || cipher == WPA_CIPHER_TKIP) {
  99                 wpa_msg(wpa_s, MSG_INFO, "mesh: Invalid pairwise cipher");
 100                 os_free(conf);
 101                 return NULL;
 102         }
 103         conf->pairwise_cipher = cipher;
 104
 105         cipher = wpa_pick_group_cipher(ssid->group_cipher);
 106         if (cipher < 0 || cipher == WPA_CIPHER_TKIP ||
 107             cipher == WPA_CIPHER_GTK_NOT_USED) {
 108                 wpa_msg(wpa_s, MSG_INFO, "mesh: Invalid group cipher");
 109                 os_free(conf);
 110                 return NULL;
 111         }
 112
 113         conf->group_cipher = cipher;
 114         if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION)
 115                 conf->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
 116
 117         /* defaults */
 118         conf->mesh_pp_id = MESH_PATH_PROTOCOL_HWMP;
 119         conf->mesh_pm_id = MESH_PATH_METRIC_AIRTIME;
 120         conf->mesh_cc_id = 0;
 121         conf->mesh_sp_id = MESH_SYNC_METHOD_NEIGHBOR_OFFSET;
 122         conf->mesh_auth_id = (conf->security & MESH_CONF_SEC_AUTH) ? 1 : 0;
 123         conf->dot11MeshMaxRetries = ssid->dot11MeshMaxRetries;
 124         conf->dot11MeshRetryTimeout = ssid->dot11MeshRetryTimeout;
 125         conf->dot11MeshConfirmTimeout = ssid->dot11MeshConfirmTimeout;
 126         conf->dot11MeshHoldingTimeout = ssid->dot11MeshHoldingTimeout;
 127
 128         return conf;
 129 }
 130
 131
 132 static void wpas_mesh_copy_groups(struct hostapd_data *bss,
 133                                   struct wpa_supplicant *wpa_s)
 134 {
 135         int num_groups;
 136         size_t groups_size;
 137
 138         for (num_groups = 0; wpa_s->conf->sae_groups[num_groups] > 0;
 139              num_groups++)
 140                 ;
 141
 142         groups_size = (num_groups + 1) * sizeof(wpa_s->conf->sae_groups[0]);
 143         bss->conf->sae_groups = os_malloc(groups_size);
 144         if (bss->conf->sae_groups)
 145                 os_memcpy(bss->conf->sae_groups, wpa_s->conf->sae_groups,
 146                           groups_size);
 147 }
 148
 149
 150 static int wpa_supplicant_mesh_init(struct wpa_supplicant *wpa_s,
 151                                     struct wpa_ssid *ssid,
 152                                     struct hostapd_freq_params *freq)
 153 {
 154         struct hostapd_iface *ifmsh;
 155         struct hostapd_data *bss;
 156         struct hostapd_config *conf;
 157         struct mesh_conf *mconf;
 158         int basic_rates_erp[] = { 10, 20, 55, 60, 110, 120, 240, -1 };
 159         static int default_groups[] = { 19, 20, 21, 25, 26, -1 };
 160         size_t len;
 161         int rate_len;
 162         int frequency;
 163
 164         if (!wpa_s->conf->user_mpm) {
 165                 /* not much for us to do here */
 166                 wpa_msg(wpa_s, MSG_WARNING,
 167                         "user_mpm is not enabled in configuration");
 168                 return 0;
 169         }
 170
 171         wpa_s->ifmsh = ifmsh = os_zalloc(sizeof(*wpa_s->ifmsh));
 172         if (!ifmsh)
 173                 return -ENOMEM;
 174
 175         ifmsh->drv_flags = wpa_s->drv_flags;
 176         ifmsh->num_bss = 1;
 177         ifmsh->bss = os_calloc(wpa_s->ifmsh->num_bss,
 178                                sizeof(struct hostapd_data *));
 179         if (!ifmsh->bss)
 180                 goto out_free;
 181
 182         ifmsh->bss[0] = bss = hostapd_alloc_bss_data(NULL, NULL, NULL);
 183         if (!bss)
 184                 goto out_free;
 185
 186         os_memcpy(bss->own_addr, wpa_s->own_addr, ETH_ALEN);
 187         bss->driver = wpa_s->driver;
 188         bss->drv_priv = wpa_s->drv_priv;
 189         bss->iface = ifmsh;
 190         bss->mesh_sta_free_cb = mesh_mpm_free_sta;
 191         frequency = ssid->frequency;
 192         if (frequency != freq->freq &&
 193             frequency == freq->freq + freq->sec_channel_offset * 20) {
 194                 wpa_printf(MSG_DEBUG, "mesh: pri/sec channels switched");
 195                 frequency = freq->freq;
 196         }
 197         wpa_s->assoc_freq = frequency;
 198         wpa_s->current_ssid = ssid;
 199
 200         /* setup an AP config for auth processing */
 201         conf = hostapd_config_defaults();
 202         if (!conf)
 203                 goto out_free;
 204
 205         bss->conf = *conf->bss;
 206         bss->conf->start_disabled = 1;
 207         bss->conf->mesh = MESH_ENABLED;
 208         bss->conf->ap_max_inactivity = wpa_s->conf->mesh_max_inactivity;
 209         bss->iconf = conf;
 210         ifmsh->conf = conf;
 211
 212         ifmsh->bss[0]->max_plinks = wpa_s->conf->max_peer_links;
 213         ifmsh->bss[0]->dot11RSNASAERetransPeriod =
 214                 wpa_s->conf->dot11RSNASAERetransPeriod;
 215         os_strlcpy(bss->conf->iface, wpa_s->ifname, sizeof(bss->conf->iface));
 216
 217         mconf = mesh_config_create(wpa_s, ssid);
 218         if (!mconf)
 219                 goto out_free;
 220         ifmsh->mconf = mconf;
 221
 222         /* need conf->hw_mode for supported rates. */
 223         conf->hw_mode = ieee80211_freq_to_chan(frequency, &conf->channel);
 224         if (conf->hw_mode == NUM_HOSTAPD_MODES) {
 225                 wpa_printf(MSG_ERROR, "Unsupported mesh mode frequency: %d MHz",
 226                            frequency);
 227                 goto out_free;
 228         }
 229         if (ssid->ht40)
 230                 conf->secondary_channel = ssid->ht40;
 231         if (conf->hw_mode == HOSTAPD_MODE_IEEE80211A && ssid->vht) {
 232                 conf->vht_oper_chwidth = ssid->max_oper_chwidth;
 233                 switch (conf->vht_oper_chwidth) {
 234                 case VHT_CHANWIDTH_80MHZ:
 235                 case VHT_CHANWIDTH_80P80MHZ:
 236                         ieee80211_freq_to_chan(
 237                                 frequency,
 238                                 &conf->vht_oper_centr_freq_seg0_idx);
 239                         conf->vht_oper_centr_freq_seg0_idx += ssid->ht40 * 2;
 240                         break;
 241                 case VHT_CHANWIDTH_160MHZ:
 242                         ieee80211_freq_to_chan(
 243                                 frequency,
 244                                 &conf->vht_oper_centr_freq_seg0_idx);
 245                         conf->vht_oper_centr_freq_seg0_idx += ssid->ht40 * 2;
 246                         conf->vht_oper_centr_freq_seg0_idx += 40 / 5;
 247                         break;
 248                 }
 249                 ieee80211_freq_to_chan(ssid->vht_center_freq2,
 250                                        &conf->vht_oper_centr_freq_seg1_idx);
 251         }
 252
 253         if (ssid->mesh_basic_rates == NULL) {
 254                 /*
 255                  * XXX: Hack! This is so an MPM which correctly sets the ERP
 256                  * mandatory rates as BSSBasicRateSet doesn't reject us. We
 257                  * could add a new hw_mode HOSTAPD_MODE_IEEE80211G_ERP, but
 258                  * this is way easier. This also makes our BSSBasicRateSet
 259                  * advertised in beacons match the one in peering frames, sigh.
 260                  */
 261                 if (conf->hw_mode == HOSTAPD_MODE_IEEE80211G) {
 262                         conf->basic_rates = os_memdup(basic_rates_erp,
 263                                                       sizeof(basic_rates_erp));
 264                         if (!conf->basic_rates)
 265                                 goto out_free;
 266                 }
 267         } else {
 268                 rate_len = 0;
 269                 while (1) {
 270                         if (ssid->mesh_basic_rates[rate_len] < 1)
 271                                 break;
 272                         rate_len++;
 273                 }
 274                 conf->basic_rates = os_calloc(rate_len + 1, sizeof(int));
 275                 if (conf->basic_rates == NULL)
 276                         goto out_free;
 277                 os_memcpy(conf->basic_rates, ssid->mesh_basic_rates,
 278                           rate_len * sizeof(int));
 279                 conf->basic_rates[rate_len] = -1;
 280         }
 281
 282         if (hostapd_setup_interface(ifmsh)) {
 283                 wpa_printf(MSG_ERROR,
 284                            "Failed to initialize hostapd interface for mesh");
 285                 return -1;
 286         }
 287
 288         if (wpa_drv_init_mesh(wpa_s)) {
 289                 wpa_msg(wpa_s, MSG_ERROR, "Failed to init mesh in driver");
 290                 return -1;
 291         }
 292
 293         if (mconf->security != MESH_CONF_SEC_NONE) {
 294                 if (ssid->passphrase == NULL) {
 295                         wpa_printf(MSG_ERROR,
 296                                    "mesh: Passphrase for SAE not configured");
 297                         goto out_free;
 298                 }
 299
 300                 bss->conf->wpa = ssid->proto;
 301                 bss->conf->wpa_key_mgmt = ssid->key_mgmt;
 302
 303                 if (wpa_s->conf->sae_groups &&
 304                     wpa_s->conf->sae_groups[0] > 0) {
 305                         wpas_mesh_copy_groups(bss, wpa_s);
 306                 } else {
 307                         bss->conf->sae_groups =
 308                                 os_memdup(default_groups,
 309                                           sizeof(default_groups));
 310                         if (!bss->conf->sae_groups)
 311                                 goto out_free;
 312                 }
 313
 314                 len = os_strlen(ssid->passphrase);
 315                 bss->conf->ssid.wpa_passphrase =
 316                         dup_binstr(ssid->passphrase, len);
 317
 318                 wpa_s->mesh_rsn = mesh_rsn_auth_init(wpa_s, mconf);
 319                 if (!wpa_s->mesh_rsn)
 320                         goto out_free;
 321         }
 322
 323         wpa_supplicant_conf_ap_ht(wpa_s, ssid, conf);
 324
 325         return 0;
 326 out_free:
 327         wpa_supplicant_mesh_deinit(wpa_s);
 328         return -ENOMEM;
 329 }
 330
 331
 332 void wpa_mesh_notify_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
 333                           const u8 *ies, size_t ie_len)
 334 {
 335         struct ieee802_11_elems elems;
 336
 337         wpa_msg(wpa_s, MSG_INFO,
 338                 "new peer notification for " MACSTR, MAC2STR(addr));
 339
 340         if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) {
 341                 wpa_msg(wpa_s, MSG_INFO, "Could not parse beacon from " MACSTR,
 342                         MAC2STR(addr));
 343                 return;
 344         }
 345         wpa_mesh_new_mesh_peer(wpa_s, addr, &elems);
 346 }
 347
 348
 349 void wpa_supplicant_mesh_add_scan_ie(struct wpa_supplicant *wpa_s,
 350                                      struct wpabuf **extra_ie)
 351 {
 352         /* EID + 0-length (wildcard) mesh-id */
 353         size_t ielen = 2;
 354
 355         if (wpabuf_resize(extra_ie, ielen) == 0) {
 356                 wpabuf_put_u8(*extra_ie, WLAN_EID_MESH_ID);
 357                 wpabuf_put_u8(*extra_ie, 0);
 358         }
 359 }
 360
 361
 362 int wpa_supplicant_join_mesh(struct wpa_supplicant *wpa_s,
 363                              struct wpa_ssid *ssid)
 364 {
 365         struct wpa_driver_mesh_join_params params;
 366         int ret = 0;
 367
 368         if (!ssid || !ssid->ssid || !ssid->ssid_len || !ssid->frequency) {
 369                 ret = -ENOENT;
 370                 goto out;
 371         }
 372
 373         wpa_supplicant_mesh_deinit(wpa_s);
 374
 375         wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 376         wpa_s->group_cipher = WPA_CIPHER_NONE;
 377         wpa_s->mgmt_group_cipher = 0;
 378
 379         os_memset(&params, 0, sizeof(params));
 380         params.meshid = ssid->ssid;
 381         params.meshid_len = ssid->ssid_len;
 382         ibss_mesh_setup_freq(wpa_s, ssid, &params.freq);
 383         wpa_s->mesh_ht_enabled = !!params.freq.ht_enabled;
 384         wpa_s->mesh_vht_enabled = !!params.freq.vht_enabled;
 385         if (params.freq.ht_enabled && params.freq.sec_channel_offset)
 386                 ssid->ht40 = params.freq.sec_channel_offset;
 387         if (wpa_s->mesh_vht_enabled) {
 388                 ssid->vht = 1;
 389                 switch (params.freq.bandwidth) {
 390                 case 80:
 391                         if (params.freq.center_freq2) {
 392                                 ssid->max_oper_chwidth = VHT_CHANWIDTH_80P80MHZ;
 393                                 ssid->vht_center_freq2 =
 394                                         params.freq.center_freq2;
 395                         } else {
 396                                 ssid->max_oper_chwidth = VHT_CHANWIDTH_80MHZ;
 397                         }
 398                         break;
 399                 case 160:
 400                         ssid->max_oper_chwidth = VHT_CHANWIDTH_160MHZ;
 401                         break;
 402                 default:
 403                         ssid->max_oper_chwidth = VHT_CHANWIDTH_USE_HT;
 404                         break;
 405                 }
 406         }
 407         if (ssid->beacon_int > 0)
 408                 params.beacon_int = ssid->beacon_int;
 409         else if (wpa_s->conf->beacon_int > 0)
 410                 params.beacon_int = wpa_s->conf->beacon_int;
 411         if (ssid->dtim_period > 0)
 412                 params.dtim_period = ssid->dtim_period;
 413         else if (wpa_s->conf->dtim_period > 0)
 414                 params.dtim_period = wpa_s->conf->dtim_period;
 415         params.conf.max_peer_links = wpa_s->conf->max_peer_links;
 416
 417         if (ssid->key_mgmt & WPA_KEY_MGMT_SAE) {
 418                 params.flags |= WPA_DRIVER_MESH_FLAG_SAE_AUTH;
 419                 params.flags |= WPA_DRIVER_MESH_FLAG_AMPE;
 420                 wpa_s->conf->user_mpm = 1;
 421         }
 422
 423         if (wpa_s->conf->user_mpm) {
 424                 params.flags |= WPA_DRIVER_MESH_FLAG_USER_MPM;
 425                 params.conf.auto_plinks = 0;
 426         } else {
 427                 params.flags |= WPA_DRIVER_MESH_FLAG_DRIVER_MPM;
 428                 params.conf.auto_plinks = 1;
 429         }
 430         params.conf.peer_link_timeout = wpa_s->conf->mesh_max_inactivity;
 431
 432         if (wpa_supplicant_mesh_init(wpa_s, ssid, &params.freq)) {
 433                 wpa_msg(wpa_s, MSG_ERROR, "Failed to init mesh");
 434                 wpa_drv_leave_mesh(wpa_s);
 435                 ret = -1;
 436                 goto out;
 437         }
 438
 439         if (ssid->key_mgmt & WPA_KEY_MGMT_SAE) {
 440                 wpa_s->pairwise_cipher = wpa_s->mesh_rsn->pairwise_cipher;
 441                 wpa_s->group_cipher = wpa_s->mesh_rsn->group_cipher;
 442                 wpa_s->mgmt_group_cipher = wpa_s->mesh_rsn->mgmt_group_cipher;
 443         }
 444
 445         if (wpa_s->ifmsh) {
 446                 params.ies = wpa_s->ifmsh->mconf->rsn_ie;
 447                 params.ie_len = wpa_s->ifmsh->mconf->rsn_ie_len;
 448                 params.basic_rates = wpa_s->ifmsh->basic_rates;
 449                 params.conf.flags |= WPA_DRIVER_MESH_CONF_FLAG_HT_OP_MODE;
 450                 params.conf.ht_opmode = wpa_s->ifmsh->bss[0]->iface->ht_op_mode;
 451         }
 452
 453         wpa_msg(wpa_s, MSG_INFO, "joining mesh %s",
 454                 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 455         ret = wpa_drv_join_mesh(wpa_s, &params);
 456         if (ret)
 457                 wpa_msg(wpa_s, MSG_ERROR, "mesh join error=%d", ret);
 458
 459         /* hostapd sets the interface down until we associate */
 460         wpa_drv_set_operstate(wpa_s, 1);
 461
 462         if (!ret)
 463                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 464
 465 out:
 466         return ret;
 467 }
 468
 469
 470 int wpa_supplicant_leave_mesh(struct wpa_supplicant *wpa_s)
 471 {
 472         int ret = 0;
 473
 474         wpa_msg(wpa_s, MSG_INFO, "leaving mesh");
 475
 476         /* Need to send peering close messages first */
 477         wpa_supplicant_mesh_deinit(wpa_s);
 478
 479         ret = wpa_drv_leave_mesh(wpa_s);
 480         if (ret)
 481                 wpa_msg(wpa_s, MSG_ERROR, "mesh leave error=%d", ret);
 482
 483         wpa_drv_set_operstate(wpa_s, 1);
 484
 485         return ret;
 486 }
 487
 488
 489 static int mesh_attr_text(const u8 *ies, size_t ies_len, char *buf, char *end)
 490 {
 491         struct ieee802_11_elems elems;
 492         char *mesh_id, *pos = buf;
 493         u8 *bss_basic_rate_set;
 494         int bss_basic_rate_set_len, ret, i;
 495
 496         if (ieee802_11_parse_elems(ies, ies_len, &elems, 0) == ParseFailed)
 497                 return -1;
 498
 499         if (elems.mesh_id_len < 1)
 500                 return 0;
 501
 502         mesh_id = os_malloc(elems.mesh_id_len + 1);
 503         if (mesh_id == NULL)
 504                 return -1;
 505
 506         os_memcpy(mesh_id, elems.mesh_id, elems.mesh_id_len);
 507         mesh_id[elems.mesh_id_len] = '\0';
 508         ret = os_snprintf(pos, end - pos, "mesh_id=%s\n", mesh_id);
 509         os_free(mesh_id);
 510         if (os_snprintf_error(end - pos, ret))
 511                 return pos - buf;
 512         pos += ret;
 513
 514         if (elems.mesh_config_len > 6) {
 515                 ret = os_snprintf(pos, end - pos,
 516                                   "active_path_selection_protocol_id=0x%02x\n"
 517                                   "active_path_selection_metric_id=0x%02x\n"
 518                                   "congestion_control_mode_id=0x%02x\n"
 519                                   "synchronization_method_id=0x%02x\n"
 520                                   "authentication_protocol_id=0x%02x\n"
 521                                   "mesh_formation_info=0x%02x\n"
 522                                   "mesh_capability=0x%02x\n",
 523                                   elems.mesh_config[0], elems.mesh_config[1],
 524                                   elems.mesh_config[2], elems.mesh_config[3],
 525                                   elems.mesh_config[4], elems.mesh_config[5],
 526                                   elems.mesh_config[6]);
 527                 if (os_snprintf_error(end - pos, ret))
 528                         return pos - buf;
 529                 pos += ret;
 530         }
 531
 532         bss_basic_rate_set = os_malloc(elems.supp_rates_len +
 533                 elems.ext_supp_rates_len);
 534         if (bss_basic_rate_set == NULL)
 535                 return -1;
 536
 537         bss_basic_rate_set_len = 0;
 538         for (i = 0; i < elems.supp_rates_len; i++) {
 539                 if (elems.supp_rates[i] & 0x80) {
 540                         bss_basic_rate_set[bss_basic_rate_set_len++] =
 541                                 (elems.supp_rates[i] & 0x7f) * 5;
 542                 }
 543         }
 544         for (i = 0; i < elems.ext_supp_rates_len; i++) {
 545                 if (elems.ext_supp_rates[i] & 0x80) {
 546                         bss_basic_rate_set[bss_basic_rate_set_len++] =
 547                                 (elems.ext_supp_rates[i] & 0x7f) * 5;
 548                 }
 549         }
 550         if (bss_basic_rate_set_len > 0) {
 551                 ret = os_snprintf(pos, end - pos, "bss_basic_rate_set=%d",
 552                                   bss_basic_rate_set[0]);
 553                 if (os_snprintf_error(end - pos, ret))
 554                         goto fail;
 555                 pos += ret;
 556
 557                 for (i = 1; i < bss_basic_rate_set_len; i++) {
 558                         ret = os_snprintf(pos, end - pos, " %d",
 559                                           bss_basic_rate_set[i]);
 560                         if (os_snprintf_error(end - pos, ret))
 561                                 goto fail;
 562                         pos += ret;
 563                 }
 564
 565                 ret = os_snprintf(pos, end - pos, "\n");
 566                 if (os_snprintf_error(end - pos, ret))
 567                         goto fail;
 568                 pos += ret;
 569         }
 570 fail:
 571         os_free(bss_basic_rate_set);
 572
 573         return pos - buf;
 574 }
 575
 576
 577 int wpas_mesh_scan_result_text(const u8 *ies, size_t ies_len, char *buf,
 578                                char *end)
 579 {
 580         return mesh_attr_text(ies, ies_len, buf, end);
 581 }
 582
 583
 584 static int wpas_mesh_get_ifname(struct wpa_supplicant *wpa_s, char *ifname,
 585                                 size_t len)
 586 {
 587         char *ifname_ptr = wpa_s->ifname;
 588         int res;
 589
 590         res = os_snprintf(ifname, len, "mesh-%s-%d", ifname_ptr,
 591                           wpa_s->mesh_if_idx);
 592         if (os_snprintf_error(len, res) ||
 593             (os_strlen(ifname) >= IFNAMSIZ &&
 594              os_strlen(wpa_s->ifname) < IFNAMSIZ)) {
 595                 /* Try to avoid going over the IFNAMSIZ length limit */
 596                 res = os_snprintf(ifname, len, "mesh-%d", wpa_s->mesh_if_idx);
 597                 if (os_snprintf_error(len, res))
 598                         return -1;
 599         }
 600         wpa_s->mesh_if_idx++;
 601         return 0;
 602 }
 603
 604
 605 int wpas_mesh_add_interface(struct wpa_supplicant *wpa_s, char *ifname,
 606                             size_t len)
 607 {
 608         struct wpa_interface iface;
 609         struct wpa_supplicant *mesh_wpa_s;
 610         u8 addr[ETH_ALEN];
 611
 612         if (ifname[0] == '\0' && wpas_mesh_get_ifname(wpa_s, ifname, len) < 0)
 613                 return -1;
 614
 615         if (wpa_drv_if_add(wpa_s, WPA_IF_MESH, ifname, NULL, NULL, NULL, addr,
 616                            NULL) < 0) {
 617                 wpa_printf(MSG_ERROR,
 618                            "mesh: Failed to create new mesh interface");
 619                 return -1;
 620         }
 621         wpa_printf(MSG_INFO, "mesh: Created virtual interface %s addr "
 622                    MACSTR, ifname, MAC2STR(addr));
 623
 624         os_memset(&iface, 0, sizeof(iface));
 625         iface.ifname = ifname;
 626         iface.driver = wpa_s->driver->name;
 627         iface.driver_param = wpa_s->conf->driver_param;
 628         iface.ctrl_interface = wpa_s->conf->ctrl_interface;
 629
 630         mesh_wpa_s = wpa_supplicant_add_iface(wpa_s->global, &iface, wpa_s);
 631         if (!mesh_wpa_s) {
 632                 wpa_printf(MSG_ERROR,
 633                            "mesh: Failed to create new wpa_supplicant interface");
 634                 wpa_drv_if_remove(wpa_s, WPA_IF_MESH, ifname);
 635                 return -1;
 636         }
 637         mesh_wpa_s->mesh_if_created = 1;
 638         return 0;
 639 }
 640
 641
 642 int wpas_mesh_peer_remove(struct wpa_supplicant *wpa_s, const u8 *addr)
 643 {
 644         return mesh_mpm_close_peer(wpa_s, addr);
 645 }
 646
 647
 648 int wpas_mesh_peer_add(struct wpa_supplicant *wpa_s, const u8 *addr,
 649                        int duration)
 650 {
 651         return mesh_mpm_connect_peer(wpa_s, addr, duration);
 652 }