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      1 /*
      2  * hostapd / Initialization and configuration
      3  * Copyright (c) 2002-2012, Jouni Malinen <j (at) w1.fi>
      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 "common/ieee802_11_defs.h"
     14 #include "radius/radius_client.h"
     15 #include "radius/radius_das.h"
     16 #include "drivers/driver.h"
     17 #include "hostapd.h"
     18 #include "authsrv.h"
     19 #include "sta_info.h"
     20 #include "accounting.h"
     21 #include "ap_list.h"
     22 #include "beacon.h"
     23 #include "iapp.h"
     24 #include "ieee802_1x.h"
     25 #include "ieee802_11_auth.h"
     26 #include "vlan_init.h"
     27 #include "wpa_auth.h"
     28 #include "wps_hostapd.h"
     29 #include "hw_features.h"
     30 #include "wpa_auth_glue.h"
     31 #include "ap_drv_ops.h"
     32 #include "ap_config.h"
     33 #include "p2p_hostapd.h"
     34 #include "gas_serv.h"
     35 
     36 
     37 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
     38 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
     39 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
     40 
     41 extern int wpa_debug_level;
     42 extern struct wpa_driver_ops *wpa_drivers[];
     43 
     44 
     45 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
     46 			       int (*cb)(struct hostapd_iface *iface,
     47 					 void *ctx), void *ctx)
     48 {
     49 	size_t i;
     50 	int ret;
     51 
     52 	for (i = 0; i < interfaces->count; i++) {
     53 		ret = cb(interfaces->iface[i], ctx);
     54 		if (ret)
     55 			return ret;
     56 	}
     57 
     58 	return 0;
     59 }
     60 
     61 
     62 static void hostapd_reload_bss(struct hostapd_data *hapd)
     63 {
     64 #ifndef CONFIG_NO_RADIUS
     65 	radius_client_reconfig(hapd->radius, hapd->conf->radius);
     66 #endif /* CONFIG_NO_RADIUS */
     67 
     68 	if (hostapd_setup_wpa_psk(hapd->conf)) {
     69 		wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
     70 			   "after reloading configuration");
     71 	}
     72 
     73 	if (hapd->conf->ieee802_1x || hapd->conf->wpa)
     74 		hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
     75 	else
     76 		hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
     77 
     78 	if (hapd->conf->wpa && hapd->wpa_auth == NULL) {
     79 		hostapd_setup_wpa(hapd);
     80 		if (hapd->wpa_auth)
     81 			wpa_init_keys(hapd->wpa_auth);
     82 	} else if (hapd->conf->wpa) {
     83 		const u8 *wpa_ie;
     84 		size_t wpa_ie_len;
     85 		hostapd_reconfig_wpa(hapd);
     86 		wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
     87 		if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
     88 			wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
     89 				   "the kernel driver.");
     90 	} else if (hapd->wpa_auth) {
     91 		wpa_deinit(hapd->wpa_auth);
     92 		hapd->wpa_auth = NULL;
     93 		hostapd_set_privacy(hapd, 0);
     94 		hostapd_setup_encryption(hapd->conf->iface, hapd);
     95 		hostapd_set_generic_elem(hapd, (u8 *) "", 0);
     96 	}
     97 
     98 	ieee802_11_set_beacon(hapd);
     99 	hostapd_update_wps(hapd);
    100 
    101 	if (hapd->conf->ssid.ssid_set &&
    102 	    hostapd_set_ssid(hapd, hapd->conf->ssid.ssid,
    103 			     hapd->conf->ssid.ssid_len)) {
    104 		wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
    105 		/* try to continue */
    106 	}
    107 	wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
    108 }
    109 
    110 
    111 int hostapd_reload_config(struct hostapd_iface *iface)
    112 {
    113 	struct hostapd_data *hapd = iface->bss[0];
    114 	struct hostapd_config *newconf, *oldconf;
    115 	size_t j;
    116 
    117 	if (iface->interfaces == NULL ||
    118 	    iface->interfaces->config_read_cb == NULL)
    119 		return -1;
    120 	newconf = iface->interfaces->config_read_cb(iface->config_fname);
    121 	if (newconf == NULL)
    122 		return -1;
    123 
    124 	/*
    125 	 * Deauthenticate all stations since the new configuration may not
    126 	 * allow them to use the BSS anymore.
    127 	 */
    128 	for (j = 0; j < iface->num_bss; j++) {
    129 		hostapd_flush_old_stations(iface->bss[j],
    130 					   WLAN_REASON_PREV_AUTH_NOT_VALID);
    131 		hostapd_broadcast_wep_clear(iface->bss[j]);
    132 
    133 #ifndef CONFIG_NO_RADIUS
    134 		/* TODO: update dynamic data based on changed configuration
    135 		 * items (e.g., open/close sockets, etc.) */
    136 		radius_client_flush(iface->bss[j]->radius, 0);
    137 #endif /* CONFIG_NO_RADIUS */
    138 	}
    139 
    140 	oldconf = hapd->iconf;
    141 	iface->conf = newconf;
    142 
    143 	for (j = 0; j < iface->num_bss; j++) {
    144 		hapd = iface->bss[j];
    145 		hapd->iconf = newconf;
    146 		hapd->conf = &newconf->bss[j];
    147 		hostapd_reload_bss(hapd);
    148 	}
    149 
    150 	hostapd_config_free(oldconf);
    151 
    152 
    153 	return 0;
    154 }
    155 
    156 
    157 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
    158 					      char *ifname)
    159 {
    160 	int i;
    161 
    162 	for (i = 0; i < NUM_WEP_KEYS; i++) {
    163 		if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
    164 					0, NULL, 0, NULL, 0)) {
    165 			wpa_printf(MSG_DEBUG, "Failed to clear default "
    166 				   "encryption keys (ifname=%s keyidx=%d)",
    167 				   ifname, i);
    168 		}
    169 	}
    170 #ifdef CONFIG_IEEE80211W
    171 	if (hapd->conf->ieee80211w) {
    172 		for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
    173 			if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
    174 						NULL, i, 0, NULL,
    175 						0, NULL, 0)) {
    176 				wpa_printf(MSG_DEBUG, "Failed to clear "
    177 					   "default mgmt encryption keys "
    178 					   "(ifname=%s keyidx=%d)", ifname, i);
    179 			}
    180 		}
    181 	}
    182 #endif /* CONFIG_IEEE80211W */
    183 }
    184 
    185 
    186 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
    187 {
    188 	hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
    189 	return 0;
    190 }
    191 
    192 
    193 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
    194 {
    195 	int errors = 0, idx;
    196 	struct hostapd_ssid *ssid = &hapd->conf->ssid;
    197 
    198 	idx = ssid->wep.idx;
    199 	if (ssid->wep.default_len &&
    200 	    hostapd_drv_set_key(hapd->conf->iface,
    201 				hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
    202 				1, NULL, 0, ssid->wep.key[idx],
    203 				ssid->wep.len[idx])) {
    204 		wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
    205 		errors++;
    206 	}
    207 
    208 	if (ssid->dyn_vlan_keys) {
    209 		size_t i;
    210 		for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
    211 			const char *ifname;
    212 			struct hostapd_wep_keys *key = ssid->dyn_vlan_keys[i];
    213 			if (key == NULL)
    214 				continue;
    215 			ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan,
    216 							    i);
    217 			if (ifname == NULL)
    218 				continue;
    219 
    220 			idx = key->idx;
    221 			if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_WEP,
    222 						broadcast_ether_addr, idx, 1,
    223 						NULL, 0, key->key[idx],
    224 						key->len[idx])) {
    225 				wpa_printf(MSG_WARNING, "Could not set "
    226 					   "dynamic VLAN WEP encryption.");
    227 				errors++;
    228 			}
    229 		}
    230 	}
    231 
    232 	return errors;
    233 }
    234 
    235 
    236 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
    237 {
    238 	iapp_deinit(hapd->iapp);
    239 	hapd->iapp = NULL;
    240 	accounting_deinit(hapd);
    241 	hostapd_deinit_wpa(hapd);
    242 	vlan_deinit(hapd);
    243 	hostapd_acl_deinit(hapd);
    244 #ifndef CONFIG_NO_RADIUS
    245 	radius_client_deinit(hapd->radius);
    246 	hapd->radius = NULL;
    247 	radius_das_deinit(hapd->radius_das);
    248 	hapd->radius_das = NULL;
    249 #endif /* CONFIG_NO_RADIUS */
    250 
    251 	hostapd_deinit_wps(hapd);
    252 
    253 	authsrv_deinit(hapd);
    254 
    255 	if (hapd->interface_added &&
    256 	    hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
    257 		wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
    258 			   hapd->conf->iface);
    259 	}
    260 
    261 	os_free(hapd->probereq_cb);
    262 	hapd->probereq_cb = NULL;
    263 
    264 #ifdef CONFIG_P2P
    265 	wpabuf_free(hapd->p2p_beacon_ie);
    266 	hapd->p2p_beacon_ie = NULL;
    267 	wpabuf_free(hapd->p2p_probe_resp_ie);
    268 	hapd->p2p_probe_resp_ie = NULL;
    269 #endif /* CONFIG_P2P */
    270 
    271 	wpabuf_free(hapd->time_adv);
    272 
    273 #ifdef CONFIG_INTERWORKING
    274 	gas_serv_deinit(hapd);
    275 #endif /* CONFIG_INTERWORKING */
    276 }
    277 
    278 
    279 /**
    280  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
    281  * @hapd: Pointer to BSS data
    282  *
    283  * This function is used to free all per-BSS data structures and resources.
    284  * This gets called in a loop for each BSS between calls to
    285  * hostapd_cleanup_iface_pre() and hostapd_cleanup_iface() when an interface
    286  * is deinitialized. Most of the modules that are initialized in
    287  * hostapd_setup_bss() are deinitialized here.
    288  */
    289 static void hostapd_cleanup(struct hostapd_data *hapd)
    290 {
    291 	if (hapd->iface->interfaces &&
    292 	    hapd->iface->interfaces->ctrl_iface_deinit)
    293 		hapd->iface->interfaces->ctrl_iface_deinit(hapd);
    294 	hostapd_free_hapd_data(hapd);
    295 }
    296 
    297 
    298 /**
    299  * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
    300  * @iface: Pointer to interface data
    301  *
    302  * This function is called before per-BSS data structures are deinitialized
    303  * with hostapd_cleanup().
    304  */
    305 static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
    306 {
    307 }
    308 
    309 
    310 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
    311 {
    312 	hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
    313 	iface->hw_features = NULL;
    314 	os_free(iface->current_rates);
    315 	iface->current_rates = NULL;
    316 	os_free(iface->basic_rates);
    317 	iface->basic_rates = NULL;
    318 	ap_list_deinit(iface);
    319 }
    320 
    321 
    322 /**
    323  * hostapd_cleanup_iface - Complete per-interface cleanup
    324  * @iface: Pointer to interface data
    325  *
    326  * This function is called after per-BSS data structures are deinitialized
    327  * with hostapd_cleanup().
    328  */
    329 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
    330 {
    331 	hostapd_cleanup_iface_partial(iface);
    332 	hostapd_config_free(iface->conf);
    333 	iface->conf = NULL;
    334 
    335 	os_free(iface->config_fname);
    336 	os_free(iface->bss);
    337 	os_free(iface);
    338 }
    339 
    340 
    341 static void hostapd_clear_wep(struct hostapd_data *hapd)
    342 {
    343 	if (hapd->drv_priv) {
    344 		hostapd_set_privacy(hapd, 0);
    345 		hostapd_broadcast_wep_clear(hapd);
    346 	}
    347 }
    348 
    349 
    350 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
    351 {
    352 	int i;
    353 
    354 	hostapd_broadcast_wep_set(hapd);
    355 
    356 	if (hapd->conf->ssid.wep.default_len) {
    357 		hostapd_set_privacy(hapd, 1);
    358 		return 0;
    359 	}
    360 
    361 	/*
    362 	 * When IEEE 802.1X is not enabled, the driver may need to know how to
    363 	 * set authentication algorithms for static WEP.
    364 	 */
    365 	hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
    366 
    367 	for (i = 0; i < 4; i++) {
    368 		if (hapd->conf->ssid.wep.key[i] &&
    369 		    hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
    370 					i == hapd->conf->ssid.wep.idx, NULL, 0,
    371 					hapd->conf->ssid.wep.key[i],
    372 					hapd->conf->ssid.wep.len[i])) {
    373 			wpa_printf(MSG_WARNING, "Could not set WEP "
    374 				   "encryption.");
    375 			return -1;
    376 		}
    377 		if (hapd->conf->ssid.wep.key[i] &&
    378 		    i == hapd->conf->ssid.wep.idx)
    379 			hostapd_set_privacy(hapd, 1);
    380 	}
    381 
    382 	return 0;
    383 }
    384 
    385 
    386 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
    387 {
    388 	int ret = 0;
    389 	u8 addr[ETH_ALEN];
    390 
    391 	if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
    392 		return 0;
    393 
    394 	wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Flushing old station entries");
    395 	if (hostapd_flush(hapd)) {
    396 		wpa_msg(hapd->msg_ctx, MSG_WARNING, "Could not connect to "
    397 			"kernel driver");
    398 		ret = -1;
    399 	}
    400 	wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
    401 	os_memset(addr, 0xff, ETH_ALEN);
    402 	hostapd_drv_sta_deauth(hapd, addr, reason);
    403 	hostapd_free_stas(hapd);
    404 
    405 	return ret;
    406 }
    407 
    408 
    409 /**
    410  * hostapd_validate_bssid_configuration - Validate BSSID configuration
    411  * @iface: Pointer to interface data
    412  * Returns: 0 on success, -1 on failure
    413  *
    414  * This function is used to validate that the configured BSSIDs are valid.
    415  */
    416 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
    417 {
    418 	u8 mask[ETH_ALEN] = { 0 };
    419 	struct hostapd_data *hapd = iface->bss[0];
    420 	unsigned int i = iface->conf->num_bss, bits = 0, j;
    421 	int auto_addr = 0;
    422 
    423 	if (hostapd_drv_none(hapd))
    424 		return 0;
    425 
    426 	/* Generate BSSID mask that is large enough to cover the BSSIDs. */
    427 
    428 	/* Determine the bits necessary to cover the number of BSSIDs. */
    429 	for (i--; i; i >>= 1)
    430 		bits++;
    431 
    432 	/* Determine the bits necessary to any configured BSSIDs,
    433 	   if they are higher than the number of BSSIDs. */
    434 	for (j = 0; j < iface->conf->num_bss; j++) {
    435 		if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
    436 			if (j)
    437 				auto_addr++;
    438 			continue;
    439 		}
    440 
    441 		for (i = 0; i < ETH_ALEN; i++) {
    442 			mask[i] |=
    443 				iface->conf->bss[j].bssid[i] ^
    444 				hapd->own_addr[i];
    445 		}
    446 	}
    447 
    448 	if (!auto_addr)
    449 		goto skip_mask_ext;
    450 
    451 	for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
    452 		;
    453 	j = 0;
    454 	if (i < ETH_ALEN) {
    455 		j = (5 - i) * 8;
    456 
    457 		while (mask[i] != 0) {
    458 			mask[i] >>= 1;
    459 			j++;
    460 		}
    461 	}
    462 
    463 	if (bits < j)
    464 		bits = j;
    465 
    466 	if (bits > 40) {
    467 		wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
    468 			   bits);
    469 		return -1;
    470 	}
    471 
    472 	os_memset(mask, 0xff, ETH_ALEN);
    473 	j = bits / 8;
    474 	for (i = 5; i > 5 - j; i--)
    475 		mask[i] = 0;
    476 	j = bits % 8;
    477 	while (j--)
    478 		mask[i] <<= 1;
    479 
    480 skip_mask_ext:
    481 	wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
    482 		   (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
    483 
    484 	if (!auto_addr)
    485 		return 0;
    486 
    487 	for (i = 0; i < ETH_ALEN; i++) {
    488 		if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
    489 			wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
    490 				   " for start address " MACSTR ".",
    491 				   MAC2STR(mask), MAC2STR(hapd->own_addr));
    492 			wpa_printf(MSG_ERROR, "Start address must be the "
    493 				   "first address in the block (i.e., addr "
    494 				   "AND mask == addr).");
    495 			return -1;
    496 		}
    497 	}
    498 
    499 	return 0;
    500 }
    501 
    502 
    503 static int mac_in_conf(struct hostapd_config *conf, const void *a)
    504 {
    505 	size_t i;
    506 
    507 	for (i = 0; i < conf->num_bss; i++) {
    508 		if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
    509 			return 1;
    510 		}
    511 	}
    512 
    513 	return 0;
    514 }
    515 
    516 
    517 #ifndef CONFIG_NO_RADIUS
    518 
    519 static int hostapd_das_nas_mismatch(struct hostapd_data *hapd,
    520 				    struct radius_das_attrs *attr)
    521 {
    522 	/* TODO */
    523 	return 0;
    524 }
    525 
    526 
    527 static struct sta_info * hostapd_das_find_sta(struct hostapd_data *hapd,
    528 					      struct radius_das_attrs *attr)
    529 {
    530 	struct sta_info *sta = NULL;
    531 	char buf[128];
    532 
    533 	if (attr->sta_addr)
    534 		sta = ap_get_sta(hapd, attr->sta_addr);
    535 
    536 	if (sta == NULL && attr->acct_session_id &&
    537 	    attr->acct_session_id_len == 17) {
    538 		for (sta = hapd->sta_list; sta; sta = sta->next) {
    539 			os_snprintf(buf, sizeof(buf), "%08X-%08X",
    540 				    sta->acct_session_id_hi,
    541 				    sta->acct_session_id_lo);
    542 			if (os_memcmp(attr->acct_session_id, buf, 17) == 0)
    543 				break;
    544 		}
    545 	}
    546 
    547 	if (sta == NULL && attr->cui) {
    548 		for (sta = hapd->sta_list; sta; sta = sta->next) {
    549 			struct wpabuf *cui;
    550 			cui = ieee802_1x_get_radius_cui(sta->eapol_sm);
    551 			if (cui && wpabuf_len(cui) == attr->cui_len &&
    552 			    os_memcmp(wpabuf_head(cui), attr->cui,
    553 				      attr->cui_len) == 0)
    554 				break;
    555 		}
    556 	}
    557 
    558 	if (sta == NULL && attr->user_name) {
    559 		for (sta = hapd->sta_list; sta; sta = sta->next) {
    560 			u8 *identity;
    561 			size_t identity_len;
    562 			identity = ieee802_1x_get_identity(sta->eapol_sm,
    563 							   &identity_len);
    564 			if (identity &&
    565 			    identity_len == attr->user_name_len &&
    566 			    os_memcmp(identity, attr->user_name, identity_len)
    567 			    == 0)
    568 				break;
    569 		}
    570 	}
    571 
    572 	return sta;
    573 }
    574 
    575 
    576 static enum radius_das_res
    577 hostapd_das_disconnect(void *ctx, struct radius_das_attrs *attr)
    578 {
    579 	struct hostapd_data *hapd = ctx;
    580 	struct sta_info *sta;
    581 
    582 	if (hostapd_das_nas_mismatch(hapd, attr))
    583 		return RADIUS_DAS_NAS_MISMATCH;
    584 
    585 	sta = hostapd_das_find_sta(hapd, attr);
    586 	if (sta == NULL)
    587 		return RADIUS_DAS_SESSION_NOT_FOUND;
    588 
    589 	hostapd_drv_sta_deauth(hapd, sta->addr,
    590 			       WLAN_REASON_PREV_AUTH_NOT_VALID);
    591 	ap_sta_deauthenticate(hapd, sta, WLAN_REASON_PREV_AUTH_NOT_VALID);
    592 
    593 	return RADIUS_DAS_SUCCESS;
    594 }
    595 
    596 #endif /* CONFIG_NO_RADIUS */
    597 
    598 
    599 /**
    600  * hostapd_setup_bss - Per-BSS setup (initialization)
    601  * @hapd: Pointer to BSS data
    602  * @first: Whether this BSS is the first BSS of an interface
    603  *
    604  * This function is used to initialize all per-BSS data structures and
    605  * resources. This gets called in a loop for each BSS when an interface is
    606  * initialized. Most of the modules that are initialized here will be
    607  * deinitialized in hostapd_cleanup().
    608  */
    609 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
    610 {
    611 	struct hostapd_bss_config *conf = hapd->conf;
    612 	u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
    613 	int ssid_len, set_ssid;
    614 	char force_ifname[IFNAMSIZ];
    615 	u8 if_addr[ETH_ALEN];
    616 
    617 	if (!first) {
    618 		if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
    619 			/* Allocate the next available BSSID. */
    620 			do {
    621 				inc_byte_array(hapd->own_addr, ETH_ALEN);
    622 			} while (mac_in_conf(hapd->iconf, hapd->own_addr));
    623 		} else {
    624 			/* Allocate the configured BSSID. */
    625 			os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
    626 
    627 			if (hostapd_mac_comp(hapd->own_addr,
    628 					     hapd->iface->bss[0]->own_addr) ==
    629 			    0) {
    630 				wpa_printf(MSG_ERROR, "BSS '%s' may not have "
    631 					   "BSSID set to the MAC address of "
    632 					   "the radio", hapd->conf->iface);
    633 				return -1;
    634 			}
    635 		}
    636 
    637 		hapd->interface_added = 1;
    638 		if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
    639 				   hapd->conf->iface, hapd->own_addr, hapd,
    640 				   &hapd->drv_priv, force_ifname, if_addr,
    641 				   hapd->conf->bridge[0] ? hapd->conf->bridge :
    642 				   NULL)) {
    643 			wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
    644 				   MACSTR ")", MAC2STR(hapd->own_addr));
    645 			return -1;
    646 		}
    647 	}
    648 
    649 	if (conf->wmm_enabled < 0)
    650 		conf->wmm_enabled = hapd->iconf->ieee80211n;
    651 
    652 	hostapd_flush_old_stations(hapd, WLAN_REASON_PREV_AUTH_NOT_VALID);
    653 	hostapd_set_privacy(hapd, 0);
    654 
    655 	hostapd_broadcast_wep_clear(hapd);
    656 	if (hostapd_setup_encryption(hapd->conf->iface, hapd))
    657 		return -1;
    658 
    659 	/*
    660 	 * Fetch the SSID from the system and use it or,
    661 	 * if one was specified in the config file, verify they
    662 	 * match.
    663 	 */
    664 	ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
    665 	if (ssid_len < 0) {
    666 		wpa_printf(MSG_ERROR, "Could not read SSID from system");
    667 		return -1;
    668 	}
    669 	if (conf->ssid.ssid_set) {
    670 		/*
    671 		 * If SSID is specified in the config file and it differs
    672 		 * from what is being used then force installation of the
    673 		 * new SSID.
    674 		 */
    675 		set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
    676 			    os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
    677 	} else {
    678 		/*
    679 		 * No SSID in the config file; just use the one we got
    680 		 * from the system.
    681 		 */
    682 		set_ssid = 0;
    683 		conf->ssid.ssid_len = ssid_len;
    684 		os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
    685 	}
    686 
    687 	if (!hostapd_drv_none(hapd)) {
    688 		wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
    689 			   " and ssid \"%s\"",
    690 			   hapd->conf->iface, MAC2STR(hapd->own_addr),
    691 			   wpa_ssid_txt(hapd->conf->ssid.ssid,
    692 					hapd->conf->ssid.ssid_len));
    693 	}
    694 
    695 	if (hostapd_setup_wpa_psk(conf)) {
    696 		wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
    697 		return -1;
    698 	}
    699 
    700 	/* Set SSID for the kernel driver (to be used in beacon and probe
    701 	 * response frames) */
    702 	if (set_ssid && hostapd_set_ssid(hapd, conf->ssid.ssid,
    703 					 conf->ssid.ssid_len)) {
    704 		wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
    705 		return -1;
    706 	}
    707 
    708 	if (wpa_debug_level == MSG_MSGDUMP)
    709 		conf->radius->msg_dumps = 1;
    710 #ifndef CONFIG_NO_RADIUS
    711 	hapd->radius = radius_client_init(hapd, conf->radius);
    712 	if (hapd->radius == NULL) {
    713 		wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
    714 		return -1;
    715 	}
    716 
    717 	if (hapd->conf->radius_das_port) {
    718 		struct radius_das_conf das_conf;
    719 		os_memset(&das_conf, 0, sizeof(das_conf));
    720 		das_conf.port = hapd->conf->radius_das_port;
    721 		das_conf.shared_secret = hapd->conf->radius_das_shared_secret;
    722 		das_conf.shared_secret_len =
    723 			hapd->conf->radius_das_shared_secret_len;
    724 		das_conf.client_addr = &hapd->conf->radius_das_client_addr;
    725 		das_conf.time_window = hapd->conf->radius_das_time_window;
    726 		das_conf.require_event_timestamp =
    727 			hapd->conf->radius_das_require_event_timestamp;
    728 		das_conf.ctx = hapd;
    729 		das_conf.disconnect = hostapd_das_disconnect;
    730 		hapd->radius_das = radius_das_init(&das_conf);
    731 		if (hapd->radius_das == NULL) {
    732 			wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
    733 				   "failed.");
    734 			return -1;
    735 		}
    736 	}
    737 #endif /* CONFIG_NO_RADIUS */
    738 
    739 	if (hostapd_acl_init(hapd)) {
    740 		wpa_printf(MSG_ERROR, "ACL initialization failed.");
    741 		return -1;
    742 	}
    743 	if (hostapd_init_wps(hapd, conf))
    744 		return -1;
    745 
    746 	if (authsrv_init(hapd) < 0)
    747 		return -1;
    748 
    749 	if (ieee802_1x_init(hapd)) {
    750 		wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
    751 		return -1;
    752 	}
    753 
    754 	if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
    755 		return -1;
    756 
    757 	if (accounting_init(hapd)) {
    758 		wpa_printf(MSG_ERROR, "Accounting initialization failed.");
    759 		return -1;
    760 	}
    761 
    762 	if (hapd->conf->ieee802_11f &&
    763 	    (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
    764 		wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
    765 			   "failed.");
    766 		return -1;
    767 	}
    768 
    769 #ifdef CONFIG_INTERWORKING
    770 	if (gas_serv_init(hapd)) {
    771 		wpa_printf(MSG_ERROR, "GAS server initialization failed");
    772 		return -1;
    773 	}
    774 #endif /* CONFIG_INTERWORKING */
    775 
    776 	if (hapd->iface->interfaces &&
    777 	    hapd->iface->interfaces->ctrl_iface_init &&
    778 	    hapd->iface->interfaces->ctrl_iface_init(hapd)) {
    779 		wpa_printf(MSG_ERROR, "Failed to setup control interface");
    780 		return -1;
    781 	}
    782 
    783 	if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
    784 		wpa_printf(MSG_ERROR, "VLAN initialization failed.");
    785 		return -1;
    786 	}
    787 
    788 	ieee802_11_set_beacon(hapd);
    789 
    790 	if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
    791 		return -1;
    792 
    793 	if (hapd->driver && hapd->driver->set_operstate)
    794 		hapd->driver->set_operstate(hapd->drv_priv, 1);
    795 
    796 	return 0;
    797 }
    798 
    799 
    800 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
    801 {
    802 	struct hostapd_data *hapd = iface->bss[0];
    803 	int i;
    804 	struct hostapd_tx_queue_params *p;
    805 
    806 	for (i = 0; i < NUM_TX_QUEUES; i++) {
    807 		p = &iface->conf->tx_queue[i];
    808 
    809 		if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
    810 						p->cwmax, p->burst)) {
    811 			wpa_printf(MSG_DEBUG, "Failed to set TX queue "
    812 				   "parameters for queue %d.", i);
    813 			/* Continue anyway */
    814 		}
    815 	}
    816 }
    817 
    818 
    819 static int setup_interface(struct hostapd_iface *iface)
    820 {
    821 	struct hostapd_data *hapd = iface->bss[0];
    822 	size_t i;
    823 	char country[4];
    824 
    825 	/*
    826 	 * Make sure that all BSSes get configured with a pointer to the same
    827 	 * driver interface.
    828 	 */
    829 	for (i = 1; i < iface->num_bss; i++) {
    830 		iface->bss[i]->driver = hapd->driver;
    831 		iface->bss[i]->drv_priv = hapd->drv_priv;
    832 	}
    833 
    834 	if (hostapd_validate_bssid_configuration(iface))
    835 		return -1;
    836 
    837 	if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
    838 		os_memcpy(country, hapd->iconf->country, 3);
    839 		country[3] = '\0';
    840 		if (hostapd_set_country(hapd, country) < 0) {
    841 			wpa_printf(MSG_ERROR, "Failed to set country code");
    842 			return -1;
    843 		}
    844 	}
    845 
    846 	if (hostapd_get_hw_features(iface)) {
    847 		/* Not all drivers support this yet, so continue without hw
    848 		 * feature data. */
    849 	} else {
    850 		int ret = hostapd_select_hw_mode(iface);
    851 		if (ret < 0) {
    852 			wpa_printf(MSG_ERROR, "Could not select hw_mode and "
    853 				   "channel. (%d)", ret);
    854 			return -1;
    855 		}
    856 		ret = hostapd_check_ht_capab(iface);
    857 		if (ret < 0)
    858 			return -1;
    859 		if (ret == 1) {
    860 			wpa_printf(MSG_DEBUG, "Interface initialization will "
    861 				   "be completed in a callback");
    862 			return 0;
    863 		}
    864 	}
    865 	return hostapd_setup_interface_complete(iface, 0);
    866 }
    867 
    868 
    869 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
    870 {
    871 	struct hostapd_data *hapd = iface->bss[0];
    872 	size_t j;
    873 	u8 *prev_addr;
    874 
    875 	if (err) {
    876 		wpa_printf(MSG_ERROR, "Interface initialization failed");
    877 		eloop_terminate();
    878 		return -1;
    879 	}
    880 
    881 	wpa_printf(MSG_DEBUG, "Completing interface initialization");
    882 	if (hapd->iconf->channel) {
    883 		iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
    884 		wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
    885 			   "Frequency: %d MHz",
    886 			   hostapd_hw_mode_txt(hapd->iconf->hw_mode),
    887 			   hapd->iconf->channel, iface->freq);
    888 
    889 		if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
    890 				     hapd->iconf->channel,
    891 				     hapd->iconf->ieee80211n,
    892 				     hapd->iconf->secondary_channel)) {
    893 			wpa_printf(MSG_ERROR, "Could not set channel for "
    894 				   "kernel driver");
    895 			return -1;
    896 		}
    897 	}
    898 
    899 	if (iface->current_mode) {
    900 		if (hostapd_prepare_rates(iface, iface->current_mode)) {
    901 			wpa_printf(MSG_ERROR, "Failed to prepare rates "
    902 				   "table.");
    903 			hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
    904 				       HOSTAPD_LEVEL_WARNING,
    905 				       "Failed to prepare rates table.");
    906 			return -1;
    907 		}
    908 	}
    909 
    910 	if (hapd->iconf->rts_threshold > -1 &&
    911 	    hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
    912 		wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
    913 			   "kernel driver");
    914 		return -1;
    915 	}
    916 
    917 	if (hapd->iconf->fragm_threshold > -1 &&
    918 	    hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
    919 		wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
    920 			   "for kernel driver");
    921 		return -1;
    922 	}
    923 
    924 	prev_addr = hapd->own_addr;
    925 
    926 	for (j = 0; j < iface->num_bss; j++) {
    927 		hapd = iface->bss[j];
    928 		if (j)
    929 			os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
    930 		if (hostapd_setup_bss(hapd, j == 0))
    931 			return -1;
    932 		if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
    933 			prev_addr = hapd->own_addr;
    934 	}
    935 
    936 	hostapd_tx_queue_params(iface);
    937 
    938 	ap_list_init(iface);
    939 
    940 	if (hostapd_driver_commit(hapd) < 0) {
    941 		wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
    942 			   "configuration", __func__);
    943 		return -1;
    944 	}
    945 
    946 	/*
    947 	 * WPS UPnP module can be initialized only when the "upnp_iface" is up.
    948 	 * If "interface" and "upnp_iface" are the same (e.g., non-bridge
    949 	 * mode), the interface is up only after driver_commit, so initialize
    950 	 * WPS after driver_commit.
    951 	 */
    952 	for (j = 0; j < iface->num_bss; j++) {
    953 		if (hostapd_init_wps_complete(iface->bss[j]))
    954 			return -1;
    955 	}
    956 
    957 	if (hapd->setup_complete_cb)
    958 		hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
    959 
    960 	wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
    961 		   iface->bss[0]->conf->iface);
    962 
    963 	return 0;
    964 }
    965 
    966 
    967 /**
    968  * hostapd_setup_interface - Setup of an interface
    969  * @iface: Pointer to interface data.
    970  * Returns: 0 on success, -1 on failure
    971  *
    972  * Initializes the driver interface, validates the configuration,
    973  * and sets driver parameters based on the configuration.
    974  * Flushes old stations, sets the channel, encryption,
    975  * beacons, and WDS links based on the configuration.
    976  */
    977 int hostapd_setup_interface(struct hostapd_iface *iface)
    978 {
    979 	int ret;
    980 
    981 	ret = setup_interface(iface);
    982 	if (ret) {
    983 		wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
    984 			   iface->bss[0]->conf->iface);
    985 		return -1;
    986 	}
    987 
    988 	return 0;
    989 }
    990 
    991 
    992 /**
    993  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
    994  * @hapd_iface: Pointer to interface data
    995  * @conf: Pointer to per-interface configuration
    996  * @bss: Pointer to per-BSS configuration for this BSS
    997  * Returns: Pointer to allocated BSS data
    998  *
    999  * This function is used to allocate per-BSS data structure. This data will be
   1000  * freed after hostapd_cleanup() is called for it during interface
   1001  * deinitialization.
   1002  */
   1003 struct hostapd_data *
   1004 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
   1005 		       struct hostapd_config *conf,
   1006 		       struct hostapd_bss_config *bss)
   1007 {
   1008 	struct hostapd_data *hapd;
   1009 
   1010 	hapd = os_zalloc(sizeof(*hapd));
   1011 	if (hapd == NULL)
   1012 		return NULL;
   1013 
   1014 	hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
   1015 	hapd->iconf = conf;
   1016 	hapd->conf = bss;
   1017 	hapd->iface = hapd_iface;
   1018 	hapd->driver = hapd->iconf->driver;
   1019 	hapd->ctrl_sock = -1;
   1020 
   1021 	return hapd;
   1022 }
   1023 
   1024 
   1025 void hostapd_interface_deinit(struct hostapd_iface *iface)
   1026 {
   1027 	size_t j;
   1028 
   1029 	if (iface == NULL)
   1030 		return;
   1031 
   1032 	hostapd_cleanup_iface_pre(iface);
   1033 	for (j = 0; j < iface->num_bss; j++) {
   1034 		struct hostapd_data *hapd = iface->bss[j];
   1035 		hostapd_free_stas(hapd);
   1036 		hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
   1037 		hostapd_clear_wep(hapd);
   1038 		hostapd_cleanup(hapd);
   1039 	}
   1040 }
   1041 
   1042 
   1043 void hostapd_interface_free(struct hostapd_iface *iface)
   1044 {
   1045 	size_t j;
   1046 	for (j = 0; j < iface->num_bss; j++)
   1047 		os_free(iface->bss[j]);
   1048 	hostapd_cleanup_iface(iface);
   1049 }
   1050 
   1051 
   1052 #ifdef HOSTAPD
   1053 
   1054 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
   1055 {
   1056 	const struct wpa_driver_ops *driver;
   1057 	void *drv_priv;
   1058 	if (iface == NULL)
   1059 		return;
   1060 	driver = iface->bss[0]->driver;
   1061 	drv_priv = iface->bss[0]->drv_priv;
   1062 	hostapd_interface_deinit(iface);
   1063 	if (driver && driver->hapd_deinit && drv_priv)
   1064 		driver->hapd_deinit(drv_priv);
   1065 	hostapd_interface_free(iface);
   1066 }
   1067 
   1068 
   1069 int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
   1070 {
   1071 	if (hapd_iface->bss[0]->drv_priv != NULL) {
   1072 		wpa_printf(MSG_ERROR, "Interface %s already enabled",
   1073 			   hapd_iface->conf->bss[0].iface);
   1074 		return -1;
   1075 	}
   1076 
   1077 	wpa_printf(MSG_DEBUG, "Enable interface %s",
   1078 		   hapd_iface->conf->bss[0].iface);
   1079 
   1080 	if (hapd_iface->interfaces == NULL ||
   1081 	    hapd_iface->interfaces->driver_init == NULL ||
   1082 	    hapd_iface->interfaces->driver_init(hapd_iface) ||
   1083 	    hostapd_setup_interface(hapd_iface)) {
   1084 		hostapd_interface_deinit_free(hapd_iface);
   1085 		return -1;
   1086 	}
   1087 	return 0;
   1088 }
   1089 
   1090 
   1091 int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
   1092 {
   1093 	size_t j;
   1094 
   1095 	wpa_printf(MSG_DEBUG, "Reload interface %s",
   1096 		   hapd_iface->conf->bss[0].iface);
   1097 	for (j = 0; j < hapd_iface->num_bss; j++) {
   1098 		hostapd_flush_old_stations(hapd_iface->bss[j],
   1099 					   WLAN_REASON_PREV_AUTH_NOT_VALID);
   1100 
   1101 #ifndef CONFIG_NO_RADIUS
   1102 		/* TODO: update dynamic data based on changed configuration
   1103 		 * items (e.g., open/close sockets, etc.) */
   1104 		radius_client_flush(hapd_iface->bss[j]->radius, 0);
   1105 #endif  /* CONFIG_NO_RADIUS */
   1106 
   1107 		hostapd_reload_bss(hapd_iface->bss[j]);
   1108 	}
   1109 	return 0;
   1110 }
   1111 
   1112 
   1113 int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
   1114 {
   1115 	size_t j;
   1116 	struct hostapd_bss_config *bss = hapd_iface->bss[0]->conf;
   1117 	const struct wpa_driver_ops *driver;
   1118 	void *drv_priv;
   1119 
   1120 	if (hapd_iface == NULL)
   1121 		return -1;
   1122 	driver = hapd_iface->bss[0]->driver;
   1123 	drv_priv = hapd_iface->bss[0]->drv_priv;
   1124 
   1125 	/* whatever hostapd_interface_deinit does */
   1126 	for (j = 0; j < hapd_iface->num_bss; j++) {
   1127 		struct hostapd_data *hapd = hapd_iface->bss[j];
   1128 		hostapd_free_stas(hapd);
   1129 		hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
   1130 		hostapd_clear_wep(hapd);
   1131 		hostapd_free_hapd_data(hapd);
   1132 	}
   1133 
   1134 	if (driver && driver->hapd_deinit && drv_priv) {
   1135 		driver->hapd_deinit(drv_priv);
   1136 		hapd_iface->bss[0]->drv_priv = NULL;
   1137 	}
   1138 
   1139 	/* From hostapd_cleanup_iface: These were initialized in
   1140 	 * hostapd_setup_interface and hostapd_setup_interface_complete
   1141 	 */
   1142 	hostapd_cleanup_iface_partial(hapd_iface);
   1143 	bss->wpa = 0;
   1144 	bss->wpa_key_mgmt = -1;
   1145 	bss->wpa_pairwise = -1;
   1146 
   1147 	wpa_printf(MSG_DEBUG, "Interface %s disabled", bss->iface);
   1148 	return 0;
   1149 }
   1150 
   1151 
   1152 static struct hostapd_iface *
   1153 hostapd_iface_alloc(struct hapd_interfaces *interfaces)
   1154 {
   1155 	struct hostapd_iface **iface, *hapd_iface;
   1156 
   1157 	iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
   1158 				 sizeof(struct hostapd_iface *));
   1159 	if (iface == NULL)
   1160 		return NULL;
   1161 	interfaces->iface = iface;
   1162 	hapd_iface = interfaces->iface[interfaces->count] =
   1163 		os_zalloc(sizeof(*hapd_iface));
   1164 	if (hapd_iface == NULL) {
   1165 		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
   1166 			   "the interface", __func__);
   1167 		return NULL;
   1168 	}
   1169 	interfaces->count++;
   1170 	hapd_iface->interfaces = interfaces;
   1171 
   1172 	return hapd_iface;
   1173 }
   1174 
   1175 
   1176 static struct hostapd_config *
   1177 hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
   1178 		     const char *ctrl_iface)
   1179 {
   1180 	struct hostapd_bss_config *bss;
   1181 	struct hostapd_config *conf;
   1182 
   1183 	/* Allocates memory for bss and conf */
   1184 	conf = hostapd_config_defaults();
   1185 	if (conf == NULL) {
   1186 		 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
   1187 				"configuration", __func__);
   1188 		return NULL;
   1189 	}
   1190 
   1191 	conf->driver = wpa_drivers[0];
   1192 	if (conf->driver == NULL) {
   1193 		wpa_printf(MSG_ERROR, "No driver wrappers registered!");
   1194 		hostapd_config_free(conf);
   1195 		return NULL;
   1196 	}
   1197 
   1198 	bss = conf->last_bss = conf->bss;
   1199 
   1200 	os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
   1201 	bss->ctrl_interface = os_strdup(ctrl_iface);
   1202 	if (bss->ctrl_interface == NULL) {
   1203 		hostapd_config_free(conf);
   1204 		return NULL;
   1205 	}
   1206 
   1207 	/* Reading configuration file skipped, will be done in SET!
   1208 	 * From reading the configuration till the end has to be done in
   1209 	 * SET
   1210 	 */
   1211 	return conf;
   1212 }
   1213 
   1214 
   1215 static struct hostapd_iface * hostapd_data_alloc(
   1216 	struct hapd_interfaces *interfaces, struct hostapd_config *conf)
   1217 {
   1218 	size_t i;
   1219 	struct hostapd_iface *hapd_iface =
   1220 		interfaces->iface[interfaces->count - 1];
   1221 	struct hostapd_data *hapd;
   1222 
   1223 	hapd_iface->conf = conf;
   1224 	hapd_iface->num_bss = conf->num_bss;
   1225 
   1226 	hapd_iface->bss = os_zalloc(conf->num_bss *
   1227 				    sizeof(struct hostapd_data *));
   1228 	if (hapd_iface->bss == NULL)
   1229 		return NULL;
   1230 
   1231 	for (i = 0; i < conf->num_bss; i++) {
   1232 		hapd = hapd_iface->bss[i] =
   1233 			hostapd_alloc_bss_data(hapd_iface, conf,
   1234 					       &conf->bss[i]);
   1235 		if (hapd == NULL)
   1236 			return NULL;
   1237 		hapd->msg_ctx = hapd;
   1238 	}
   1239 
   1240 	hapd_iface->interfaces = interfaces;
   1241 
   1242 	return hapd_iface;
   1243 }
   1244 
   1245 
   1246 int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
   1247 {
   1248 	struct hostapd_config *conf = NULL;
   1249 	struct hostapd_iface *hapd_iface = NULL;
   1250 	char *ptr;
   1251 	size_t i;
   1252 
   1253 	ptr = os_strchr(buf, ' ');
   1254 	if (ptr == NULL)
   1255 		return -1;
   1256 	*ptr++ = '\0';
   1257 
   1258 	for (i = 0; i < interfaces->count; i++) {
   1259 		if (!os_strcmp(interfaces->iface[i]->conf->bss[0].iface,
   1260 			       buf)) {
   1261 			wpa_printf(MSG_INFO, "Cannot add interface - it "
   1262 				   "already exists");
   1263 			return -1;
   1264 		}
   1265 	}
   1266 
   1267 	hapd_iface = hostapd_iface_alloc(interfaces);
   1268 	if (hapd_iface == NULL) {
   1269 		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
   1270 			   "for interface", __func__);
   1271 		goto fail;
   1272 	}
   1273 
   1274 	conf = hostapd_config_alloc(interfaces, buf, ptr);
   1275 	if (conf == NULL) {
   1276 		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
   1277 			   "for configuration", __func__);
   1278 		goto fail;
   1279 	}
   1280 
   1281 	hapd_iface = hostapd_data_alloc(interfaces, conf);
   1282 	if (hapd_iface == NULL) {
   1283 		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
   1284 			   "for hostapd", __func__);
   1285 		goto fail;
   1286 	}
   1287 
   1288 	if (hapd_iface->interfaces &&
   1289 	    hapd_iface->interfaces->ctrl_iface_init &&
   1290 	    hapd_iface->interfaces->ctrl_iface_init(hapd_iface->bss[0])) {
   1291 		wpa_printf(MSG_ERROR, "%s: Failed to setup control "
   1292 			   "interface", __func__);
   1293 		goto fail;
   1294 	}
   1295 	wpa_printf(MSG_INFO, "Add interface '%s'", conf->bss[0].iface);
   1296 
   1297 	return 0;
   1298 
   1299 fail:
   1300 	if (conf)
   1301 		hostapd_config_free(conf);
   1302 	if (hapd_iface) {
   1303 		os_free(hapd_iface->bss[interfaces->count]);
   1304 		os_free(hapd_iface);
   1305 	}
   1306 	return -1;
   1307 }
   1308 
   1309 
   1310 int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
   1311 {
   1312 	struct hostapd_iface *hapd_iface;
   1313 	size_t i, k = 0;
   1314 
   1315 	for (i = 0; i < interfaces->count; i++) {
   1316 		hapd_iface = interfaces->iface[i];
   1317 		if (hapd_iface == NULL)
   1318 			return -1;
   1319 		if (!os_strcmp(hapd_iface->conf->bss[0].iface, buf)) {
   1320 			wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
   1321 			hostapd_interface_deinit_free(hapd_iface);
   1322 			k = i;
   1323 			while (k < (interfaces->count - 1)) {
   1324 				interfaces->iface[k] =
   1325 					interfaces->iface[k + 1];
   1326 				k++;
   1327 			}
   1328 			interfaces->count--;
   1329 			return 0;
   1330 		}
   1331 	}
   1332 	return -1;
   1333 }
   1334 
   1335 #endif /* HOSTAPD */
   1336 
   1337 
   1338 /**
   1339  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
   1340  * @hapd: Pointer to BSS data
   1341  * @sta: Pointer to the associated STA data
   1342  * @reassoc: 1 to indicate this was a re-association; 0 = first association
   1343  *
   1344  * This function will be called whenever a station associates with the AP. It
   1345  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
   1346  * from drv_callbacks.c based on driver events for drivers that take care of
   1347  * management frames (IEEE 802.11 authentication and association) internally.
   1348  */
   1349 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
   1350 			   int reassoc)
   1351 {
   1352 	if (hapd->tkip_countermeasures) {
   1353 		hostapd_drv_sta_deauth(hapd, sta->addr,
   1354 				       WLAN_REASON_MICHAEL_MIC_FAILURE);
   1355 		return;
   1356 	}
   1357 
   1358 	hostapd_prune_associations(hapd, sta->addr);
   1359 
   1360 	/* IEEE 802.11F (IAPP) */
   1361 	if (hapd->conf->ieee802_11f)
   1362 		iapp_new_station(hapd->iapp, sta);
   1363 
   1364 #ifdef CONFIG_P2P
   1365 	if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
   1366 		sta->no_p2p_set = 1;
   1367 		hapd->num_sta_no_p2p++;
   1368 		if (hapd->num_sta_no_p2p == 1)
   1369 			hostapd_p2p_non_p2p_sta_connected(hapd);
   1370 	}
   1371 #endif /* CONFIG_P2P */
   1372 
   1373 	/* Start accounting here, if IEEE 802.1X and WPA are not used.
   1374 	 * IEEE 802.1X/WPA code will start accounting after the station has
   1375 	 * been authorized. */
   1376 	if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
   1377 		accounting_sta_start(hapd, sta);
   1378 
   1379 	/* Start IEEE 802.1X authentication process for new stations */
   1380 	ieee802_1x_new_station(hapd, sta);
   1381 	if (reassoc) {
   1382 		if (sta->auth_alg != WLAN_AUTH_FT &&
   1383 		    !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
   1384 			wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
   1385 	} else
   1386 		wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
   1387 
   1388 	wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
   1389 		   "for " MACSTR " (%d seconds - ap_max_inactivity)",
   1390 		   __func__, MAC2STR(sta->addr),
   1391 		   hapd->conf->ap_max_inactivity);
   1392 	eloop_cancel_timeout(ap_handle_timer, hapd, sta);
   1393 	eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
   1394 			       ap_handle_timer, hapd, sta);
   1395 }
   1396