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