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