src/ap/ap_drv_ops.c

   1 /*
   2  * hostapd - Driver operations
   3  * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "utils/includes.h"
  16
  17 #include "utils/common.h"
  18 #include "drivers/driver.h"
  19 #include "hostapd.h"
  20 #include "ieee802_11.h"
  21 #include "sta_info.h"
  22 #include "ap_config.h"
  23 #include "ap_drv_ops.h"
  24
  25
  26 static int hostapd_sta_flags_to_drv(int flags)
  27 {
  28         int res = 0;
  29         if (flags & WLAN_STA_AUTHORIZED)
  30                 res |= WPA_STA_AUTHORIZED;
  31         if (flags & WLAN_STA_WMM)
  32                 res |= WPA_STA_WMM;
  33         if (flags & WLAN_STA_SHORT_PREAMBLE)
  34                 res |= WPA_STA_SHORT_PREAMBLE;
  35         if (flags & WLAN_STA_MFP)
  36                 res |= WPA_STA_MFP;
  37         return res;
  38 }
  39
  40
  41 static int hostapd_set_ap_wps_ie(struct hostapd_data *hapd,
  42                                  const struct wpabuf *beacon,
  43                                  const struct wpabuf *proberesp)
  44 {
  45         if (hapd->driver == NULL || hapd->driver->set_ap_wps_ie == NULL)
  46                 return 0;
  47         return hapd->driver->set_ap_wps_ie(hapd->conf->iface, hapd->drv_priv,
  48                                            beacon, proberesp);
  49 }
  50
  51
  52 static int hostapd_send_mgmt_frame(struct hostapd_data *hapd, const void *msg,
  53                            size_t len)
  54 {
  55         if (hapd->driver == NULL || hapd->driver->send_mlme == NULL)
  56                 return 0;
  57         return hapd->driver->send_mlme(hapd->drv_priv, msg, len);
  58 }
  59
  60
  61 static int hostapd_send_eapol(struct hostapd_data *hapd, const u8 *addr,
  62                               const u8 *data, size_t data_len, int encrypt)
  63 {
  64         if (hapd->driver == NULL || hapd->driver->hapd_send_eapol == NULL)
  65                 return 0;
  66         return hapd->driver->hapd_send_eapol(hapd->drv_priv, addr, data,
  67                                              data_len, encrypt,
  68                                              hapd->own_addr);
  69 }
  70
  71
  72 static int hostapd_set_authorized(struct hostapd_data *hapd,
  73                                   struct sta_info *sta, int authorized)
  74 {
  75         if (authorized) {
  76                 return hostapd_sta_set_flags(hapd, sta->addr,
  77                                              hostapd_sta_flags_to_drv(
  78                                                      sta->flags),
  79                                              WPA_STA_AUTHORIZED, ~0);
  80         }
  81
  82         return hostapd_sta_set_flags(hapd, sta->addr,
  83                                      hostapd_sta_flags_to_drv(sta->flags),
  84                                      0, ~WPA_STA_AUTHORIZED);
  85 }
  86
  87
  88 static int hostapd_set_key(const char *ifname, struct hostapd_data *hapd,
  89                            enum wpa_alg alg, const u8 *addr, int key_idx,
  90                            int set_tx, const u8 *seq, size_t seq_len,
  91                            const u8 *key, size_t key_len)
  92 {
  93         if (hapd->driver == NULL || hapd->driver->set_key == NULL)
  94                 return 0;
  95         return hapd->driver->set_key(ifname, hapd->drv_priv, alg, addr,
  96                                      key_idx, set_tx, seq, seq_len, key,
  97                                      key_len);
  98 }
  99
 100
 101 static int hostapd_read_sta_data(struct hostapd_data *hapd,
 102                                  struct hostap_sta_driver_data *data,
 103                                  const u8 *addr)
 104 {
 105         if (hapd->driver == NULL || hapd->driver->read_sta_data == NULL)
 106                 return -1;
 107         return hapd->driver->read_sta_data(hapd->drv_priv, data, addr);
 108 }
 109
 110
 111 static int hostapd_sta_clear_stats(struct hostapd_data *hapd, const u8 *addr)
 112 {
 113         if (hapd->driver == NULL || hapd->driver->sta_clear_stats == NULL)
 114                 return 0;
 115         return hapd->driver->sta_clear_stats(hapd->drv_priv, addr);
 116 }
 117
 118
 119 static int hostapd_set_sta_flags(struct hostapd_data *hapd,
 120                                  struct sta_info *sta)
 121 {
 122         int set_flags, total_flags, flags_and, flags_or;
 123         total_flags = hostapd_sta_flags_to_drv(sta->flags);
 124         set_flags = WPA_STA_SHORT_PREAMBLE | WPA_STA_WMM | WPA_STA_MFP;
 125         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
 126             sta->flags & WLAN_STA_AUTHORIZED)
 127                 set_flags |= WPA_STA_AUTHORIZED;
 128         flags_or = total_flags & set_flags;
 129         flags_and = total_flags | ~set_flags;
 130         return hostapd_sta_set_flags(hapd, sta->addr, total_flags,
 131                                      flags_or, flags_and);
 132 }
 133
 134
 135 static int hostapd_set_drv_ieee8021x(struct hostapd_data *hapd,
 136                                      const char *ifname, int enabled)
 137 {
 138         struct wpa_bss_params params;
 139         os_memset(&params, 0, sizeof(params));
 140         params.ifname = ifname;
 141         params.enabled = enabled;
 142         if (enabled) {
 143                 params.wpa = hapd->conf->wpa;
 144                 params.ieee802_1x = hapd->conf->ieee802_1x;
 145                 params.wpa_group = hapd->conf->wpa_group;
 146                 params.wpa_pairwise = hapd->conf->wpa_pairwise;
 147                 params.wpa_key_mgmt = hapd->conf->wpa_key_mgmt;
 148                 params.rsn_preauth = hapd->conf->rsn_preauth;
 149         }
 150         return hostapd_set_ieee8021x(hapd, &params);
 151 }
 152
 153
 154 static int hostapd_set_radius_acl_auth(struct hostapd_data *hapd,
 155                                        const u8 *mac, int accepted,
 156                                        u32 session_timeout)
 157 {
 158         if (hapd->driver == NULL || hapd->driver->set_radius_acl_auth == NULL)
 159                 return 0;
 160         return hapd->driver->set_radius_acl_auth(hapd->drv_priv, mac, accepted,
 161                                                  session_timeout);
 162 }
 163
 164
 165 static int hostapd_set_radius_acl_expire(struct hostapd_data *hapd,
 166                                          const u8 *mac)
 167 {
 168         if (hapd->driver == NULL ||
 169             hapd->driver->set_radius_acl_expire == NULL)
 170                 return 0;
 171         return hapd->driver->set_radius_acl_expire(hapd->drv_priv, mac);
 172 }
 173
 174
 175 static int hostapd_set_bss_params(struct hostapd_data *hapd,
 176                                   int use_protection)
 177 {
 178         int ret = 0;
 179         int preamble;
 180 #ifdef CONFIG_IEEE80211N
 181         u8 buf[60], *ht_capab, *ht_oper, *pos;
 182
 183         pos = buf;
 184         ht_capab = pos;
 185         pos = hostapd_eid_ht_capabilities(hapd, pos);
 186         ht_oper = pos;
 187         pos = hostapd_eid_ht_operation(hapd, pos);
 188         if (pos > ht_oper && ht_oper > ht_capab &&
 189             hostapd_set_ht_params(hapd->conf->iface, hapd,
 190                                   ht_capab + 2, ht_capab[1],
 191                                   ht_oper + 2, ht_oper[1])) {
 192                 wpa_printf(MSG_ERROR, "Could not set HT capabilities "
 193                            "for kernel driver");
 194                 ret = -1;
 195         }
 196
 197 #endif /* CONFIG_IEEE80211N */
 198
 199         if (hostapd_set_cts_protect(hapd, use_protection)) {
 200                 wpa_printf(MSG_ERROR, "Failed to set CTS protect in kernel "
 201                            "driver");
 202                 ret = -1;
 203         }
 204
 205         if (hapd->iface->current_mode &&
 206             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
 207             hostapd_set_short_slot_time(hapd,
 208                                         hapd->iface->num_sta_no_short_slot_time
 209                                         > 0 ? 0 : 1)) {
 210                 wpa_printf(MSG_ERROR, "Failed to set Short Slot Time option "
 211                            "in kernel driver");
 212                 ret = -1;
 213         }
 214
 215         if (hapd->iface->num_sta_no_short_preamble == 0 &&
 216             hapd->iconf->preamble == SHORT_PREAMBLE)
 217                 preamble = SHORT_PREAMBLE;
 218         else
 219                 preamble = LONG_PREAMBLE;
 220         if (hostapd_set_preamble(hapd, preamble)) {
 221                 wpa_printf(MSG_ERROR, "Could not set preamble for kernel "
 222                            "driver");
 223                 ret = -1;
 224         }
 225
 226         return ret;
 227 }
 228
 229
 230 static int hostapd_set_beacon(struct hostapd_data *hapd,
 231                               const u8 *head, size_t head_len,
 232                               const u8 *tail, size_t tail_len, int dtim_period,
 233                               int beacon_int)
 234 {
 235         if (hapd->driver == NULL || hapd->driver->set_beacon == NULL)
 236                 return 0;
 237         return hapd->driver->set_beacon(hapd->drv_priv,
 238                                         head, head_len, tail, tail_len,
 239                                         dtim_period, beacon_int);
 240 }
 241
 242
 243 static int hostapd_vlan_if_add(struct hostapd_data *hapd, const char *ifname)
 244 {
 245         return hostapd_if_add(hapd, WPA_IF_AP_VLAN, ifname, NULL, NULL, NULL);
 246 }
 247
 248 static int hostapd_vlan_if_remove(struct hostapd_data *hapd,
 249                                   const char *ifname)
 250 {
 251         return hostapd_if_remove(hapd, WPA_IF_AP_VLAN, ifname);
 252 }
 253
 254
 255 static int hostapd_set_wds_sta(struct hostapd_data *hapd, const u8 *addr,
 256                                int aid, int val)
 257 {
 258         if (hapd->driver == NULL || hapd->driver->set_wds_sta == NULL)
 259                 return 0;
 260         return hapd->driver->set_wds_sta(hapd->drv_priv, addr, aid, val);
 261 }
 262
 263
 264 static int hostapd_set_sta_vlan(const char *ifname, struct hostapd_data *hapd,
 265                                 const u8 *addr, int vlan_id)
 266 {
 267         if (hapd->driver == NULL || hapd->driver->set_sta_vlan == NULL)
 268                 return 0;
 269         return hapd->driver->set_sta_vlan(hapd->drv_priv, addr, ifname,
 270                                           vlan_id);
 271 }
 272
 273
 274 static int hostapd_get_inact_sec(struct hostapd_data *hapd, const u8 *addr)
 275 {
 276         if (hapd->driver == NULL || hapd->driver->get_inact_sec == NULL)
 277                 return 0;
 278         return hapd->driver->get_inact_sec(hapd->drv_priv, addr);
 279 }
 280
 281
 282 static int hostapd_sta_deauth(struct hostapd_data *hapd, const u8 *addr,
 283                               int reason)
 284 {
 285         if (hapd->driver == NULL || hapd->driver->sta_deauth == NULL)
 286                 return 0;
 287         return hapd->driver->sta_deauth(hapd->drv_priv, hapd->own_addr, addr,
 288                                         reason);
 289 }
 290
 291
 292 static int hostapd_sta_disassoc(struct hostapd_data *hapd, const u8 *addr,
 293                                 int reason)
 294 {
 295         if (hapd->driver == NULL || hapd->driver->sta_disassoc == NULL)
 296                 return 0;
 297         return hapd->driver->sta_disassoc(hapd->drv_priv, hapd->own_addr, addr,
 298                                           reason);
 299 }
 300
 301
 302 static int hostapd_sta_add(const char *ifname, struct hostapd_data *hapd,
 303                            const u8 *addr, u16 aid, u16 capability,
 304                            const u8 *supp_rates, size_t supp_rates_len,
 305                            u16 listen_interval,
 306                            const struct ieee80211_ht_capabilities *ht_capab)
 307 {
 308         struct hostapd_sta_add_params params;
 309
 310         if (hapd->driver == NULL)
 311                 return 0;
 312         if (hapd->driver->sta_add == NULL)
 313                 return 0;
 314
 315         os_memset(&params, 0, sizeof(params));
 316         params.addr = addr;
 317         params.aid = aid;
 318         params.capability = capability;
 319         params.supp_rates = supp_rates;
 320         params.supp_rates_len = supp_rates_len;
 321         params.listen_interval = listen_interval;
 322         params.ht_capabilities = ht_capab;
 323         return hapd->driver->sta_add(ifname, hapd->drv_priv, &params);
 324 }
 325
 326
 327 static int hostapd_sta_remove(struct hostapd_data *hapd, const u8 *addr)
 328 {
 329         if (hapd->driver == NULL || hapd->driver->sta_remove == NULL)
 330                 return 0;
 331         return hapd->driver->sta_remove(hapd->drv_priv, addr);
 332 }
 333
 334
 335 static int hostapd_set_countermeasures(struct hostapd_data *hapd, int enabled)
 336 {
 337         if (hapd->driver == NULL ||
 338             hapd->driver->hapd_set_countermeasures == NULL)
 339                 return 0;
 340         return hapd->driver->hapd_set_countermeasures(hapd->drv_priv, enabled);
 341 }
 342
 343
 344 void hostapd_set_driver_ops(struct hostapd_driver_ops *ops)
 345 {
 346         ops->set_ap_wps_ie = hostapd_set_ap_wps_ie;
 347         ops->send_mgmt_frame = hostapd_send_mgmt_frame;
 348         ops->send_eapol = hostapd_send_eapol;
 349         ops->set_authorized = hostapd_set_authorized;
 350         ops->set_key = hostapd_set_key;
 351         ops->read_sta_data = hostapd_read_sta_data;
 352         ops->sta_clear_stats = hostapd_sta_clear_stats;
 353         ops->set_sta_flags = hostapd_set_sta_flags;
 354         ops->set_drv_ieee8021x = hostapd_set_drv_ieee8021x;
 355         ops->set_radius_acl_auth = hostapd_set_radius_acl_auth;
 356         ops->set_radius_acl_expire = hostapd_set_radius_acl_expire;
 357         ops->set_bss_params = hostapd_set_bss_params;
 358         ops->set_beacon = hostapd_set_beacon;
 359         ops->vlan_if_add = hostapd_vlan_if_add;
 360         ops->vlan_if_remove = hostapd_vlan_if_remove;
 361         ops->set_wds_sta = hostapd_set_wds_sta;
 362         ops->set_sta_vlan = hostapd_set_sta_vlan;
 363         ops->get_inact_sec = hostapd_get_inact_sec;
 364         ops->sta_deauth = hostapd_sta_deauth;
 365         ops->sta_disassoc = hostapd_sta_disassoc;
 366         ops->sta_add = hostapd_sta_add;
 367         ops->sta_remove = hostapd_sta_remove;
 368         ops->set_countermeasures = hostapd_set_countermeasures;
 369 }
 370
 371
 372 int hostapd_set_privacy(struct hostapd_data *hapd, int enabled)
 373 {
 374         if (hapd->driver == NULL || hapd->driver->set_privacy == NULL)
 375                 return 0;
 376         return hapd->driver->set_privacy(hapd->drv_priv, enabled);
 377 }
 378
 379
 380 int hostapd_set_generic_elem(struct hostapd_data *hapd, const u8 *elem,
 381                              size_t elem_len)
 382 {
 383         if (hapd->driver == NULL || hapd->driver->set_generic_elem == NULL)
 384                 return 0;
 385         return hapd->driver->set_generic_elem(hapd->drv_priv, elem, elem_len);
 386 }
 387
 388
 389 int hostapd_get_ssid(struct hostapd_data *hapd, u8 *buf, size_t len)
 390 {
 391         if (hapd->driver == NULL || hapd->driver->hapd_get_ssid == NULL)
 392                 return 0;
 393         return hapd->driver->hapd_get_ssid(hapd->drv_priv, buf, len);
 394 }
 395
 396
 397 int hostapd_set_ssid(struct hostapd_data *hapd, const u8 *buf, size_t len)
 398 {
 399         if (hapd->driver == NULL || hapd->driver->hapd_set_ssid == NULL)
 400                 return 0;
 401         return hapd->driver->hapd_set_ssid(hapd->drv_priv, buf, len);
 402 }
 403
 404
 405 int hostapd_if_add(struct hostapd_data *hapd, enum wpa_driver_if_type type,
 406                    const char *ifname, const u8 *addr, void *bss_ctx,
 407                    void **drv_priv)
 408 {
 409         if (hapd->driver == NULL || hapd->driver->if_add == NULL)
 410                 return -1;
 411         return hapd->driver->if_add(hapd->drv_priv, type, ifname, addr,
 412                                     bss_ctx, drv_priv);
 413 }
 414
 415
 416 int hostapd_if_remove(struct hostapd_data *hapd, enum wpa_driver_if_type type,
 417                       const char *ifname)
 418 {
 419         if (hapd->driver == NULL || hapd->driver->if_remove == NULL)
 420                 return -1;
 421         return hapd->driver->if_remove(hapd->drv_priv, type, ifname);
 422 }
 423
 424
 425 int hostapd_set_ieee8021x(struct hostapd_data *hapd,
 426                           struct wpa_bss_params *params)
 427 {
 428         if (hapd->driver == NULL || hapd->driver->set_ieee8021x == NULL)
 429                 return 0;
 430         return hapd->driver->set_ieee8021x(hapd->drv_priv, params);
 431 }
 432
 433
 434 int hostapd_get_seqnum(const char *ifname, struct hostapd_data *hapd,
 435                        const u8 *addr, int idx, u8 *seq)
 436 {
 437         if (hapd->driver == NULL || hapd->driver->get_seqnum == NULL)
 438                 return 0;
 439         return hapd->driver->get_seqnum(ifname, hapd->drv_priv, addr, idx,
 440                                         seq);
 441 }
 442
 443
 444 int hostapd_flush(struct hostapd_data *hapd)
 445 {
 446         if (hapd->driver == NULL || hapd->driver->flush == NULL)
 447                 return 0;
 448         return hapd->driver->flush(hapd->drv_priv);
 449 }
 450
 451
 452 int hostapd_set_freq(struct hostapd_data *hapd, int mode, int freq,
 453                      int channel, int ht_enabled, int sec_channel_offset)
 454 {
 455         struct hostapd_freq_params data;
 456         if (hapd->driver == NULL)
 457                 return 0;
 458         if (hapd->driver->set_freq == NULL)
 459                 return 0;
 460         os_memset(&data, 0, sizeof(data));
 461         data.mode = mode;
 462         data.freq = freq;
 463         data.channel = channel;
 464         data.ht_enabled = ht_enabled;
 465         data.sec_channel_offset = sec_channel_offset;
 466         return hapd->driver->set_freq(hapd->drv_priv, &data);
 467 }
 468
 469 int hostapd_set_rts(struct hostapd_data *hapd, int rts)
 470 {
 471         if (hapd->driver == NULL || hapd->driver->set_rts == NULL)
 472                 return 0;
 473         return hapd->driver->set_rts(hapd->drv_priv, rts);
 474 }
 475
 476
 477 int hostapd_set_frag(struct hostapd_data *hapd, int frag)
 478 {
 479         if (hapd->driver == NULL || hapd->driver->set_frag == NULL)
 480                 return 0;
 481         return hapd->driver->set_frag(hapd->drv_priv, frag);
 482 }
 483
 484
 485 int hostapd_sta_set_flags(struct hostapd_data *hapd, u8 *addr,
 486                           int total_flags, int flags_or, int flags_and)
 487 {
 488         if (hapd->driver == NULL || hapd->driver->sta_set_flags == NULL)
 489                 return 0;
 490         return hapd->driver->sta_set_flags(hapd->conf->iface, hapd->drv_priv, addr, total_flags,
 491                                            flags_or, flags_and);
 492 }
 493
 494
 495 int hostapd_set_rate_sets(struct hostapd_data *hapd, int *supp_rates,
 496                           int *basic_rates, int mode)
 497 {
 498         if (hapd->driver == NULL || hapd->driver->set_rate_sets == NULL)
 499                 return 0;
 500         return hapd->driver->set_rate_sets(hapd->drv_priv, supp_rates,
 501                                            basic_rates, mode);
 502 }
 503
 504
 505 int hostapd_set_country(struct hostapd_data *hapd, const char *country)
 506 {
 507         if (hapd->driver == NULL ||
 508             hapd->driver->set_country == NULL)
 509                 return 0;
 510         return hapd->driver->set_country(hapd->drv_priv, country);
 511 }
 512
 513
 514 int hostapd_set_cts_protect(struct hostapd_data *hapd, int value)
 515 {
 516         if (hapd->driver == NULL || hapd->driver->set_cts_protect == NULL)
 517                 return 0;
 518         return hapd->driver->set_cts_protect(hapd->drv_priv, value);
 519 }
 520
 521
 522 int hostapd_set_preamble(struct hostapd_data *hapd, int value)
 523 {
 524         if (hapd->driver == NULL || hapd->driver->set_preamble == NULL)
 525                 return 0;
 526         return hapd->driver->set_preamble(hapd->drv_priv, value);
 527 }
 528
 529
 530 int hostapd_set_short_slot_time(struct hostapd_data *hapd, int value)
 531 {
 532         if (hapd->driver == NULL || hapd->driver->set_short_slot_time == NULL)
 533                 return 0;
 534         return hapd->driver->set_short_slot_time(hapd->drv_priv, value);
 535 }
 536
 537
 538 int hostapd_set_tx_queue_params(struct hostapd_data *hapd, int queue, int aifs,
 539                                 int cw_min, int cw_max, int burst_time)
 540 {
 541         if (hapd->driver == NULL || hapd->driver->set_tx_queue_params == NULL)
 542                 return 0;
 543         return hapd->driver->set_tx_queue_params(hapd->drv_priv, queue, aifs,
 544                                                  cw_min, cw_max, burst_time);
 545 }
 546
 547
 548 int hostapd_valid_bss_mask(struct hostapd_data *hapd, const u8 *addr,
 549                            const u8 *mask)
 550 {
 551         if (hapd->driver == NULL || hapd->driver->valid_bss_mask == NULL)
 552                 return 1;
 553         return hapd->driver->valid_bss_mask(hapd->drv_priv, addr, mask);
 554 }
 555
 556
 557 struct hostapd_hw_modes *
 558 hostapd_get_hw_feature_data(struct hostapd_data *hapd, u16 *num_modes,
 559                             u16 *flags)
 560 {
 561         if (hapd->driver == NULL ||
 562             hapd->driver->get_hw_feature_data == NULL)
 563                 return NULL;
 564         return hapd->driver->get_hw_feature_data(hapd->drv_priv, num_modes,
 565                                                  flags);
 566 }
 567
 568
 569 int hostapd_driver_commit(struct hostapd_data *hapd)
 570 {
 571         if (hapd->driver == NULL || hapd->driver->commit == NULL)
 572                 return 0;
 573         return hapd->driver->commit(hapd->drv_priv);
 574 }
 575
 576
 577 int hostapd_set_ht_params(const char *ifname, struct hostapd_data *hapd,
 578                           const u8 *ht_capab, size_t ht_capab_len,
 579                           const u8 *ht_oper, size_t ht_oper_len)
 580 {
 581         if (hapd->driver == NULL || hapd->driver->set_ht_params == NULL ||
 582             ht_capab == NULL || ht_oper == NULL)
 583                 return 0;
 584         return hapd->driver->set_ht_params(
 585                 ifname, hapd->drv_priv, ht_capab, ht_capab_len,
 586                 ht_oper, ht_oper_len);
 587 }
 588
 589
 590 int hostapd_drv_none(struct hostapd_data *hapd)
 591 {
 592         return hapd->driver && os_strcmp(hapd->driver->name, "none") == 0;
 593 }
 594
 595
 596 int hostapd_driver_scan(struct hostapd_data *hapd,
 597                         struct wpa_driver_scan_params *params)
 598 {
 599         if (hapd->driver && hapd->driver->scan2)
 600                 return hapd->driver->scan2(hapd->drv_priv, params);
 601         return -1;
 602 }
 603
 604
 605 struct wpa_scan_results * hostapd_driver_get_scan_results(
 606         struct hostapd_data *hapd)
 607 {
 608         if (hapd->driver && hapd->driver->get_scan_results2)
 609                 return hapd->driver->get_scan_results2(hapd->drv_priv);
 610         return NULL;
 611 }