wpa_supplicant/ap.c

   1 /*
   2  * WPA Supplicant - Basic AP mode support routines
   3  * Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2009, Atheros Communications
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Alternatively, this software may be distributed under the terms of BSD
  11  * license.
  12  *
  13  * See README and COPYING for more details.
  14  */
  15
  16 #include "includes.h"
  17
  18 #include "common.h"
  19 #include "../hostapd/hostapd.h"
  20 #include "../hostapd/config.h"
  21 #ifdef NEED_AP_MLME
  22 #include "../hostapd/ieee802_11.h"
  23 #endif /* NEED_AP_MLME */
  24 #include "../hostapd/wps_hostapd.h"
  25 #include "../hostapd/ctrl_iface_ap.h"
  26 #include "eap_common/eap_defs.h"
  27 #include "eap_server/eap_methods.h"
  28 #include "eap_common/eap_wsc_common.h"
  29 #include "wps/wps.h"
  30 #include "config_ssid.h"
  31 #include "wpa_supplicant_i.h"
  32 #include "driver_i.h"
  33 #include "ap.h"
  34
  35
  36 struct hapd_interfaces {
  37         size_t count;
  38         struct hostapd_iface **iface;
  39 };
  40
  41
  42 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  43                                int (*cb)(struct hostapd_iface *iface,
  44                                          void *ctx), void *ctx)
  45 {
  46         /* TODO */
  47         return 0;
  48 }
  49
  50
  51 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
  52 {
  53         return 0;
  54 }
  55
  56
  57 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
  58 {
  59 }
  60
  61
  62 struct ap_driver_data {
  63         struct hostapd_data *hapd;
  64 };
  65
  66
  67 static void * ap_driver_init(struct hostapd_data *hapd,
  68                              struct wpa_init_params *params)
  69 {
  70         struct ap_driver_data *drv;
  71         struct wpa_supplicant *wpa_s = hapd->iface->owner;
  72
  73         drv = os_zalloc(sizeof(struct ap_driver_data));
  74         if (drv == NULL) {
  75                 wpa_printf(MSG_ERROR, "Could not allocate memory for AP "
  76                            "driver data");
  77                 return NULL;
  78         }
  79         drv->hapd = hapd;
  80         os_memcpy(hapd->own_addr, wpa_s->own_addr, ETH_ALEN);
  81
  82         return drv;
  83 }
  84
  85
  86 static void ap_driver_deinit(void *priv)
  87 {
  88         struct ap_driver_data *drv = priv;
  89
  90         os_free(drv);
  91 }
  92
  93
  94 static int ap_driver_send_ether(void *priv, const u8 *dst, const u8 *src,
  95                                 u16 proto, const u8 *data, size_t data_len)
  96 {
  97         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
  98         return -1;
  99 }
 100
 101
 102 static int ap_driver_set_key(const char *iface, void *priv, wpa_alg alg,
 103                              const u8 *addr, int key_idx, int set_tx,
 104                              const u8 *seq, size_t seq_len, const u8 *key,
 105                              size_t key_len)
 106 {
 107         struct ap_driver_data *drv = priv;
 108         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 109         return wpa_drv_set_key(wpa_s, alg, addr, key_idx, set_tx, seq, seq_len,
 110                                key, key_len);
 111 }
 112
 113
 114 static int ap_driver_get_seqnum(const char *iface, void *priv, const u8 *addr,
 115                                 int idx, u8 *seq)
 116 {
 117         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 118         return -1;
 119 }
 120
 121
 122 static int ap_driver_flush(void *priv)
 123 {
 124         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 125         return -1;
 126 }
 127
 128
 129 static int ap_driver_read_sta_data(void *priv,
 130                                    struct hostap_sta_driver_data *data,
 131                                    const u8 *addr)
 132 {
 133         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 134         return -1;
 135 }
 136
 137
 138 static int ap_driver_sta_set_flags(void *priv, const u8 *addr, int total_flags,
 139                                    int flags_or, int flags_and)
 140 {
 141         struct ap_driver_data *drv = priv;
 142         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 143         return wpa_drv_sta_set_flags(wpa_s, addr, total_flags, flags_or,
 144                                      flags_and);
 145 }
 146
 147
 148 static int ap_driver_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
 149                                 int reason)
 150 {
 151         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 152         return -1;
 153 }
 154
 155
 156 static int ap_driver_sta_disassoc(void *priv, const u8 *own_addr,
 157                                   const u8 *addr, int reason)
 158 {
 159         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 160         return -1;
 161 }
 162
 163
 164 static int ap_driver_sta_remove(void *priv, const u8 *addr)
 165 {
 166         struct ap_driver_data *drv = priv;
 167         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 168         return wpa_drv_sta_remove(wpa_s, addr);
 169 }
 170
 171
 172 static int ap_driver_send_mlme(void *priv, const u8 *data, size_t len)
 173 {
 174         struct ap_driver_data *drv = priv;
 175         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 176         return wpa_drv_send_mlme(wpa_s, data, len);
 177 }
 178
 179
 180 static int ap_driver_sta_add(const char *ifname, void *priv,
 181                              struct hostapd_sta_add_params *params)
 182 {
 183         struct ap_driver_data *drv = priv;
 184         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 185         return wpa_drv_sta_add(wpa_s, params);
 186 }
 187
 188
 189 static int ap_driver_get_inact_sec(void *priv, const u8 *addr)
 190 {
 191         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 192         return -1;
 193 }
 194
 195
 196 static int ap_driver_set_freq(void *priv, struct hostapd_freq_params *freq)
 197 {
 198         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 199         return 0;
 200 }
 201
 202
 203 static int ap_driver_set_beacon(const char *iface, void *priv,
 204                                 const u8 *head, size_t head_len,
 205                                 const u8 *tail, size_t tail_len,
 206                                 int dtim_period, int beacon_int)
 207 {
 208         struct ap_driver_data *drv = priv;
 209         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 210         return wpa_drv_set_beacon(wpa_s, head, head_len, tail, tail_len,
 211                                   dtim_period, beacon_int);
 212 }
 213
 214
 215 static int ap_driver_set_cts_protect(void *priv, int value)
 216 {
 217         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 218         return -1;
 219 }
 220
 221
 222 static int ap_driver_set_preamble(void *priv, int value)
 223 {
 224         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 225         return -1;
 226 }
 227
 228
 229 static int ap_driver_set_short_slot_time(void *priv, int value)
 230 {
 231         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 232         return -1;
 233 }
 234
 235
 236 static int ap_driver_set_tx_queue_params(void *priv, int queue, int aifs,
 237                                          int cw_min, int cw_max,
 238                                          int burst_time)
 239 {
 240         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 241         return -1;
 242 }
 243
 244
 245 static struct hostapd_hw_modes *ap_driver_get_hw_feature_data(void *priv,
 246                                                               u16 *num_modes,
 247                                                               u16 *flags)
 248 {
 249         struct ap_driver_data *drv = priv;
 250         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 251         return wpa_drv_get_hw_feature_data(wpa_s, num_modes, flags);
 252 }
 253
 254
 255 static int ap_driver_hapd_send_eapol(void *priv, const u8 *addr,
 256                                      const u8 *data, size_t data_len,
 257                                      int encrypt, const u8 *own_addr)
 258 {
 259         struct ap_driver_data *drv = priv;
 260         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 261         return wpa_drv_hapd_send_eapol(wpa_s, addr, data, data_len, encrypt,
 262                                        own_addr);
 263 }
 264
 265
 266 struct wpa_driver_ops ap_driver_ops =
 267 {
 268         .name = "wpa_supplicant",
 269         .hapd_init = ap_driver_init,
 270         .hapd_deinit = ap_driver_deinit,
 271         .send_ether = ap_driver_send_ether,
 272         .set_key = ap_driver_set_key,
 273         .get_seqnum = ap_driver_get_seqnum,
 274         .flush = ap_driver_flush,
 275         .read_sta_data = ap_driver_read_sta_data,
 276         .sta_set_flags = ap_driver_sta_set_flags,
 277         .sta_deauth = ap_driver_sta_deauth,
 278         .sta_disassoc = ap_driver_sta_disassoc,
 279         .sta_remove = ap_driver_sta_remove,
 280         .send_mlme = ap_driver_send_mlme,
 281         .sta_add = ap_driver_sta_add,
 282         .get_inact_sec = ap_driver_get_inact_sec,
 283         .set_freq = ap_driver_set_freq,
 284         .set_beacon = ap_driver_set_beacon,
 285         .set_cts_protect = ap_driver_set_cts_protect,
 286         .set_preamble = ap_driver_set_preamble,
 287         .set_short_slot_time = ap_driver_set_short_slot_time,
 288         .set_tx_queue_params = ap_driver_set_tx_queue_params,
 289         .get_hw_feature_data = ap_driver_get_hw_feature_data,
 290         .hapd_send_eapol = ap_driver_hapd_send_eapol,
 291 };
 292
 293
 294 extern struct wpa_driver_ops *wpa_drivers[];
 295
 296 static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
 297                                   struct wpa_ssid *ssid,
 298                                   struct hostapd_config *conf)
 299 {
 300         struct hostapd_bss_config *bss = &conf->bss[0];
 301         int j, pairwise;
 302
 303         for (j = 0; wpa_drivers[j]; j++) {
 304                 if (os_strcmp("wpa_supplicant", wpa_drivers[j]->name) == 0) {
 305                         conf->driver = wpa_drivers[j];
 306                         break;
 307                 }
 308         }
 309         if (conf->driver == NULL) {
 310                 wpa_printf(MSG_ERROR, "No AP driver ops found");
 311                 return -1;
 312         }
 313
 314         os_strlcpy(bss->iface, wpa_s->ifname, sizeof(bss->iface));
 315
 316         if (ssid->frequency == 0) {
 317                 /* default channel 11 */
 318                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 319                 conf->channel = 11;
 320         } else if (ssid->frequency >= 2412 && ssid->frequency <= 2472) {
 321                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 322                 conf->channel = (ssid->frequency - 2407) / 5;
 323         } else if ((ssid->frequency >= 5180 && ssid->frequency <= 5240) ||
 324                    (ssid->frequency >= 5745 && ssid->frequency <= 5825)) {
 325                 conf->hw_mode = HOSTAPD_MODE_IEEE80211A;
 326                 conf->channel = (ssid->frequency - 5000) / 5;
 327         } else {
 328                 wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: %d MHz",
 329                            ssid->frequency);
 330                 return -1;
 331         }
 332
 333         /* TODO: enable HT if driver supports it;
 334          * drop to 11b if driver does not support 11g */
 335
 336         if (ssid->ssid_len == 0) {
 337                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 338                 return -1;
 339         }
 340         os_memcpy(bss->ssid.ssid, ssid->ssid, ssid->ssid_len);
 341         bss->ssid.ssid[ssid->ssid_len] = '\0';
 342         bss->ssid.ssid_len = ssid->ssid_len;
 343         bss->ssid.ssid_set = 1;
 344
 345         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt))
 346                 bss->wpa = ssid->proto;
 347         bss->wpa_key_mgmt = ssid->key_mgmt;
 348         bss->wpa_pairwise = ssid->pairwise_cipher;
 349         if (ssid->passphrase) {
 350                 bss->ssid.wpa_passphrase = os_strdup(ssid->passphrase);
 351         } else if (ssid->psk_set) {
 352                 os_free(bss->ssid.wpa_psk);
 353                 bss->ssid.wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 354                 if (bss->ssid.wpa_psk == NULL)
 355                         return -1;
 356                 os_memcpy(bss->ssid.wpa_psk->psk, ssid->psk, PMK_LEN);
 357                 bss->ssid.wpa_psk->group = 1;
 358         }
 359
 360         /* Select group cipher based on the enabled pairwise cipher suites */
 361         pairwise = 0;
 362         if (bss->wpa & 1)
 363                 pairwise |= bss->wpa_pairwise;
 364         if (bss->wpa & 2) {
 365                 if (bss->rsn_pairwise == 0)
 366                         bss->rsn_pairwise = bss->wpa_pairwise;
 367                 pairwise |= bss->rsn_pairwise;
 368         }
 369         if (pairwise & WPA_CIPHER_TKIP)
 370                 bss->wpa_group = WPA_CIPHER_TKIP;
 371         else
 372                 bss->wpa_group = WPA_CIPHER_CCMP;
 373
 374         if (bss->wpa && bss->ieee802_1x)
 375                 bss->ssid.security_policy = SECURITY_WPA;
 376         else if (bss->wpa)
 377                 bss->ssid.security_policy = SECURITY_WPA_PSK;
 378         else if (bss->ieee802_1x) {
 379                 bss->ssid.security_policy = SECURITY_IEEE_802_1X;
 380                 bss->ssid.wep.default_len = bss->default_wep_key_len;
 381         } else if (bss->ssid.wep.keys_set)
 382                 bss->ssid.security_policy = SECURITY_STATIC_WEP;
 383         else
 384                 bss->ssid.security_policy = SECURITY_PLAINTEXT;
 385
 386 #ifdef CONFIG_WPS
 387         /*
 388          * Enable WPS by default, but require user interaction to actually use
 389          * it. Only the internal Registrar is supported.
 390          */
 391         bss->eap_server = 1;
 392         bss->wps_state = 2;
 393         bss->ap_setup_locked = 1;
 394         bss->config_methods = os_strdup("display push_button keypad");
 395 #endif /* CONFIG_WPS */
 396
 397         return 0;
 398 }
 399
 400
 401 int wpa_supplicant_create_ap(struct wpa_supplicant *wpa_s,
 402                              struct wpa_ssid *ssid)
 403 {
 404         struct wpa_driver_associate_params params;
 405         struct hostapd_iface *hapd_iface;
 406         struct hostapd_config *conf;
 407         size_t i;
 408
 409         if (ssid->ssid == NULL || ssid->ssid_len == 0) {
 410                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 411                 return -1;
 412         }
 413
 414         wpa_supplicant_ap_deinit(wpa_s);
 415
 416         wpa_printf(MSG_DEBUG, "Setting up AP (SSID='%s')",
 417                    wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 418
 419         os_memset(&params, 0, sizeof(params));
 420         params.ssid = ssid->ssid;
 421         params.ssid_len = ssid->ssid_len;
 422         params.mode = ssid->mode;
 423         params.freq = ssid->frequency;
 424
 425         if (wpa_drv_associate(wpa_s, &params) < 0) {
 426                 wpa_msg(wpa_s, MSG_INFO, "Failed to start AP functionality");
 427                 return -1;
 428         }
 429
 430         wpa_s->ap_iface = hapd_iface = os_zalloc(sizeof(*wpa_s->ap_iface));
 431         if (hapd_iface == NULL)
 432                 return -1;
 433         hapd_iface->owner = wpa_s;
 434
 435         wpa_s->ap_iface->conf = conf = hostapd_config_defaults();
 436         if (conf == NULL) {
 437                 wpa_supplicant_ap_deinit(wpa_s);
 438                 return -1;
 439         }
 440
 441         if (wpa_supplicant_conf_ap(wpa_s, ssid, conf)) {
 442                 wpa_printf(MSG_ERROR, "Failed to create AP configuration");
 443                 wpa_supplicant_ap_deinit(wpa_s);
 444                 return -1;
 445         }
 446
 447         hapd_iface->num_bss = conf->num_bss;
 448         hapd_iface->bss = os_zalloc(conf->num_bss *
 449                                     sizeof(struct hostapd_data *));
 450         if (hapd_iface->bss == NULL) {
 451                 wpa_supplicant_ap_deinit(wpa_s);
 452                 return -1;
 453         }
 454
 455         for (i = 0; i < conf->num_bss; i++) {
 456                 hapd_iface->bss[i] =
 457                         hostapd_alloc_bss_data(hapd_iface, conf,
 458                                                &conf->bss[i]);
 459                 if (hapd_iface->bss[i] == NULL) {
 460                         wpa_supplicant_ap_deinit(wpa_s);
 461                         return -1;
 462                 }
 463
 464                 hapd_iface->bss[i]->msg_ctx = wpa_s;
 465         }
 466
 467         if (hostapd_setup_interface(wpa_s->ap_iface)) {
 468                 wpa_printf(MSG_ERROR, "Failed to initialize AP interface");
 469                 wpa_supplicant_ap_deinit(wpa_s);
 470                 return -1;
 471         }
 472
 473         wpa_s->current_ssid = ssid;
 474         os_memcpy(wpa_s->bssid, wpa_s->own_addr, ETH_ALEN);
 475         wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 476
 477         return 0;
 478 }
 479
 480
 481 void wpa_supplicant_ap_deinit(struct wpa_supplicant *wpa_s)
 482 {
 483         if (wpa_s->ap_iface == NULL)
 484                 return;
 485
 486         hostapd_interface_deinit(wpa_s->ap_iface);
 487         wpa_s->ap_iface = NULL;
 488 }
 489
 490
 491 void ap_tx_status(void *ctx, const u8 *addr,
 492                   const u8 *buf, size_t len, int ack)
 493 {
 494 #ifdef NEED_AP_MLME
 495         struct wpa_supplicant *wpa_s = ctx;
 496         hostapd_tx_status(wpa_s->ap_iface->bss[0], addr, buf, len, ack);
 497 #endif /* NEED_AP_MLME */
 498 }
 499
 500
 501 void ap_rx_from_unknown_sta(void *ctx, const struct ieee80211_hdr *hdr,
 502                             size_t len)
 503 {
 504 #ifdef NEED_AP_MLME
 505         struct wpa_supplicant *wpa_s = ctx;
 506         ieee802_11_rx_from_unknown(wpa_s->ap_iface->bss[0], hdr->addr2);
 507 #endif /* NEED_AP_MLME */
 508 }
 509
 510
 511 void ap_mgmt_rx(void *ctx, const u8 *buf, size_t len,
 512                 struct hostapd_frame_info *fi)
 513 {
 514 #ifdef NEED_AP_MLME
 515         struct wpa_supplicant *wpa_s = ctx;
 516         ieee802_11_mgmt(wpa_s->ap_iface->bss[0], buf, len, fi);
 517 #endif /* NEED_AP_MLME */
 518 }
 519
 520
 521 void ap_mgmt_tx_cb(void *ctx, const u8 *buf, size_t len, u16 stype, int ok)
 522 {
 523 #ifdef NEED_AP_MLME
 524         struct wpa_supplicant *wpa_s = ctx;
 525         ieee802_11_mgmt_cb(wpa_s->ap_iface->bss[0], buf, len, stype, ok);
 526 #endif /* NEED_AP_MLME */
 527 }
 528
 529
 530 void wpa_supplicant_ap_rx_eapol(struct wpa_supplicant *wpa_s,
 531                                 const u8 *src_addr, const u8 *buf, size_t len)
 532 {
 533         hostapd_eapol_receive(wpa_s->ap_iface->bss[0], src_addr, buf, len);
 534 }
 535
 536
 537 #ifdef CONFIG_WPS
 538
 539 int wpa_supplicant_ap_wps_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 540 {
 541         return hostapd_wps_button_pushed(wpa_s->ap_iface->bss[0]);
 542 }
 543
 544
 545 int wpa_supplicant_ap_wps_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 546                               const char *pin, char *buf, size_t buflen)
 547 {
 548         int ret, ret_len = 0;
 549
 550         if (pin == NULL) {
 551                 unsigned int rpin = wps_generate_pin();
 552                 ret_len = os_snprintf(buf, buflen, "%d", rpin);
 553                 pin = buf;
 554         }
 555
 556         ret = hostapd_wps_add_pin(wpa_s->ap_iface->bss[0], "any", pin, 0);
 557         if (ret)
 558                 return -1;
 559         return ret_len;
 560 }
 561
 562 #endif /* CONFIG_WPS */
 563
 564
 565 #ifdef CONFIG_CTRL_IFACE
 566
 567 int ap_ctrl_iface_sta_first(struct wpa_supplicant *wpa_s,
 568                             char *buf, size_t buflen)
 569 {
 570         if (wpa_s->ap_iface == NULL)
 571                 return -1;
 572         return hostapd_ctrl_iface_sta_first(wpa_s->ap_iface->bss[0],
 573                                             buf, buflen);
 574 }
 575
 576
 577 int ap_ctrl_iface_sta(struct wpa_supplicant *wpa_s, const char *txtaddr,
 578                       char *buf, size_t buflen)
 579 {
 580         if (wpa_s->ap_iface == NULL)
 581                 return -1;
 582         return hostapd_ctrl_iface_sta(wpa_s->ap_iface->bss[0], txtaddr,
 583                                       buf, buflen);
 584 }
 585
 586
 587 int ap_ctrl_iface_sta_next(struct wpa_supplicant *wpa_s, const char *txtaddr,
 588                            char *buf, size_t buflen)
 589 {
 590         if (wpa_s->ap_iface == NULL)
 591                 return -1;
 592         return hostapd_ctrl_iface_sta_next(wpa_s->ap_iface->bss[0], txtaddr,
 593                                            buf, buflen);
 594 }
 595
 596
 597 int ap_ctrl_iface_wpa_get_status(struct wpa_supplicant *wpa_s, char *buf,
 598                                  size_t buflen, int verbose)
 599 {
 600         char *pos = buf, *end = buf + buflen;
 601         int ret;
 602         struct hostapd_bss_config *conf;
 603
 604         if (wpa_s->ap_iface == NULL)
 605                 return -1;
 606
 607         conf = wpa_s->ap_iface->bss[0]->conf;
 608         if (conf->wpa == 0)
 609                 return 0;
 610
 611         ret = os_snprintf(pos, end - pos,
 612                           "pairwise_cipher=%s\n"
 613                           "group_cipher=%s\n"
 614                           "key_mgmt=%s\n",
 615                           wpa_cipher_txt(conf->rsn_pairwise),
 616                           wpa_cipher_txt(conf->wpa_group),
 617                           wpa_key_mgmt_txt(conf->wpa_key_mgmt,
 618                                            conf->wpa));
 619         if (ret < 0 || ret >= end - pos)
 620                 return pos - buf;
 621         pos += ret;
 622         return pos - buf;
 623 }
 624
 625 #endif /* CONFIG_CTRL_IFACE */