hostapd.c revision c5ec7f57ead87efa365800228aa0b09a12d9e6c4
1/* 2 * hostapd / Initialization and configuration 3 * Copyright (c) 2002-2009, Jouni Malinen <j@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 "drivers/driver.h" 16#include "hostapd.h" 17#include "authsrv.h" 18#include "sta_info.h" 19#include "accounting.h" 20#include "ap_list.h" 21#include "beacon.h" 22#include "iapp.h" 23#include "ieee802_1x.h" 24#include "ieee802_11_auth.h" 25#include "vlan_init.h" 26#include "wpa_auth.h" 27#include "wps_hostapd.h" 28#include "hw_features.h" 29#include "wpa_auth_glue.h" 30#include "ap_drv_ops.h" 31#include "ap_config.h" 32#include "p2p_hostapd.h" 33 34 35static int hostapd_flush_old_stations(struct hostapd_data *hapd); 36static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd); 37static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd); 38 39extern int wpa_debug_level; 40 41 42static void hostapd_reload_bss(struct hostapd_data *hapd) 43{ 44#ifndef CONFIG_NO_RADIUS 45 radius_client_reconfig(hapd->radius, hapd->conf->radius); 46#endif /* CONFIG_NO_RADIUS */ 47 48 if (hostapd_setup_wpa_psk(hapd->conf)) { 49 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK " 50 "after reloading configuration"); 51 } 52 53 if (hapd->conf->ieee802_1x || hapd->conf->wpa) 54 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1); 55 else 56 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0); 57 58 if (hapd->conf->wpa && hapd->wpa_auth == NULL) { 59 hostapd_setup_wpa(hapd); 60 if (hapd->wpa_auth) 61 wpa_init_keys(hapd->wpa_auth); 62 } else if (hapd->conf->wpa) { 63 const u8 *wpa_ie; 64 size_t wpa_ie_len; 65 hostapd_reconfig_wpa(hapd); 66 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len); 67 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len)) 68 wpa_printf(MSG_ERROR, "Failed to configure WPA IE for " 69 "the kernel driver."); 70 } else if (hapd->wpa_auth) { 71 wpa_deinit(hapd->wpa_auth); 72 hapd->wpa_auth = NULL; 73 hostapd_set_privacy(hapd, 0); 74 hostapd_setup_encryption(hapd->conf->iface, hapd); 75 hostapd_set_generic_elem(hapd, (u8 *) "", 0); 76 } 77 78 ieee802_11_set_beacon(hapd); 79 hostapd_update_wps(hapd); 80 81 if (hapd->conf->ssid.ssid_set && 82 hostapd_set_ssid(hapd, (u8 *) hapd->conf->ssid.ssid, 83 hapd->conf->ssid.ssid_len)) { 84 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver"); 85 /* try to continue */ 86 } 87 wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface); 88} 89 90 91int hostapd_reload_config(struct hostapd_iface *iface) 92{ 93 struct hostapd_data *hapd = iface->bss[0]; 94 struct hostapd_config *newconf, *oldconf; 95 size_t j; 96 97 if (iface->config_read_cb == NULL) 98 return -1; 99 newconf = iface->config_read_cb(iface->config_fname); 100 if (newconf == NULL) 101 return -1; 102 103 /* 104 * Deauthenticate all stations since the new configuration may not 105 * allow them to use the BSS anymore. 106 */ 107 for (j = 0; j < iface->num_bss; j++) { 108 hostapd_flush_old_stations(iface->bss[j]); 109 hostapd_broadcast_wep_clear(iface->bss[j]); 110 111#ifndef CONFIG_NO_RADIUS 112 /* TODO: update dynamic data based on changed configuration 113 * items (e.g., open/close sockets, etc.) */ 114 radius_client_flush(iface->bss[j]->radius, 0); 115#endif /* CONFIG_NO_RADIUS */ 116 } 117 118 oldconf = hapd->iconf; 119 iface->conf = newconf; 120 121 for (j = 0; j < iface->num_bss; j++) { 122 hapd = iface->bss[j]; 123 hapd->iconf = newconf; 124 hapd->conf = &newconf->bss[j]; 125 hostapd_reload_bss(hapd); 126 } 127 128 hostapd_config_free(oldconf); 129 130 131 return 0; 132} 133 134 135static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd, 136 char *ifname) 137{ 138 int i; 139 140 for (i = 0; i < NUM_WEP_KEYS; i++) { 141 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i, 142 0, NULL, 0, NULL, 0)) { 143 wpa_printf(MSG_DEBUG, "Failed to clear default " 144 "encryption keys (ifname=%s keyidx=%d)", 145 ifname, i); 146 } 147 } 148#ifdef CONFIG_IEEE80211W 149 if (hapd->conf->ieee80211w) { 150 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) { 151 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, 152 NULL, i, 0, NULL, 153 0, NULL, 0)) { 154 wpa_printf(MSG_DEBUG, "Failed to clear " 155 "default mgmt encryption keys " 156 "(ifname=%s keyidx=%d)", ifname, i); 157 } 158 } 159 } 160#endif /* CONFIG_IEEE80211W */ 161} 162 163 164static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd) 165{ 166 hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface); 167 return 0; 168} 169 170 171static int hostapd_broadcast_wep_set(struct hostapd_data *hapd) 172{ 173 int errors = 0, idx; 174 struct hostapd_ssid *ssid = &hapd->conf->ssid; 175 176 idx = ssid->wep.idx; 177 if (ssid->wep.default_len && 178 hostapd_drv_set_key(hapd->conf->iface, 179 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx, 180 1, NULL, 0, ssid->wep.key[idx], 181 ssid->wep.len[idx])) { 182 wpa_printf(MSG_WARNING, "Could not set WEP encryption."); 183 errors++; 184 } 185 186 if (ssid->dyn_vlan_keys) { 187 size_t i; 188 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) { 189 const char *ifname; 190 struct hostapd_wep_keys *key = ssid->dyn_vlan_keys[i]; 191 if (key == NULL) 192 continue; 193 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, 194 i); 195 if (ifname == NULL) 196 continue; 197 198 idx = key->idx; 199 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_WEP, 200 broadcast_ether_addr, idx, 1, 201 NULL, 0, key->key[idx], 202 key->len[idx])) { 203 wpa_printf(MSG_WARNING, "Could not set " 204 "dynamic VLAN WEP encryption."); 205 errors++; 206 } 207 } 208 } 209 210 return errors; 211} 212 213/** 214 * hostapd_cleanup - Per-BSS cleanup (deinitialization) 215 * @hapd: Pointer to BSS data 216 * 217 * This function is used to free all per-BSS data structures and resources. 218 * This gets called in a loop for each BSS between calls to 219 * hostapd_cleanup_iface_pre() and hostapd_cleanup_iface() when an interface 220 * is deinitialized. Most of the modules that are initialized in 221 * hostapd_setup_bss() are deinitialized here. 222 */ 223static void hostapd_cleanup(struct hostapd_data *hapd) 224{ 225 if (hapd->iface->ctrl_iface_deinit) 226 hapd->iface->ctrl_iface_deinit(hapd); 227 228 iapp_deinit(hapd->iapp); 229 hapd->iapp = NULL; 230 accounting_deinit(hapd); 231 hostapd_deinit_wpa(hapd); 232 vlan_deinit(hapd); 233 hostapd_acl_deinit(hapd); 234#ifndef CONFIG_NO_RADIUS 235 radius_client_deinit(hapd->radius); 236 hapd->radius = NULL; 237#endif /* CONFIG_NO_RADIUS */ 238 239 hostapd_deinit_wps(hapd); 240 241 authsrv_deinit(hapd); 242 243 if (hapd->interface_added && 244 hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) { 245 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s", 246 hapd->conf->iface); 247 } 248 249 os_free(hapd->probereq_cb); 250 hapd->probereq_cb = NULL; 251 252#ifdef CONFIG_P2P 253 wpabuf_free(hapd->p2p_beacon_ie); 254 hapd->p2p_beacon_ie = NULL; 255 wpabuf_free(hapd->p2p_probe_resp_ie); 256 hapd->p2p_probe_resp_ie = NULL; 257#endif /* CONFIG_P2P */ 258 259 wpabuf_free(hapd->time_adv); 260} 261 262 263/** 264 * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup 265 * @iface: Pointer to interface data 266 * 267 * This function is called before per-BSS data structures are deinitialized 268 * with hostapd_cleanup(). 269 */ 270static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface) 271{ 272} 273 274 275/** 276 * hostapd_cleanup_iface - Complete per-interface cleanup 277 * @iface: Pointer to interface data 278 * 279 * This function is called after per-BSS data structures are deinitialized 280 * with hostapd_cleanup(). 281 */ 282static void hostapd_cleanup_iface(struct hostapd_iface *iface) 283{ 284 hostapd_free_hw_features(iface->hw_features, iface->num_hw_features); 285 iface->hw_features = NULL; 286 os_free(iface->current_rates); 287 iface->current_rates = NULL; 288 os_free(iface->basic_rates); 289 iface->basic_rates = NULL; 290 ap_list_deinit(iface); 291 hostapd_config_free(iface->conf); 292 iface->conf = NULL; 293 294 os_free(iface->config_fname); 295 os_free(iface->bss); 296 os_free(iface); 297} 298 299 300static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd) 301{ 302 int i; 303 304 hostapd_broadcast_wep_set(hapd); 305 306 if (hapd->conf->ssid.wep.default_len) { 307 hostapd_set_privacy(hapd, 1); 308 return 0; 309 } 310 311 /* 312 * When IEEE 802.1X is not enabled, the driver may need to know how to 313 * set authentication algorithms for static WEP. 314 */ 315 hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs); 316 317 for (i = 0; i < 4; i++) { 318 if (hapd->conf->ssid.wep.key[i] && 319 hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i, 320 i == hapd->conf->ssid.wep.idx, NULL, 0, 321 hapd->conf->ssid.wep.key[i], 322 hapd->conf->ssid.wep.len[i])) { 323 wpa_printf(MSG_WARNING, "Could not set WEP " 324 "encryption."); 325 return -1; 326 } 327 if (hapd->conf->ssid.wep.key[i] && 328 i == hapd->conf->ssid.wep.idx) 329 hostapd_set_privacy(hapd, 1); 330 } 331 332 return 0; 333} 334 335 336static int hostapd_flush_old_stations(struct hostapd_data *hapd) 337{ 338 int ret = 0; 339 u8 addr[ETH_ALEN]; 340 341 if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL) 342 return 0; 343 344 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Flushing old station entries"); 345 if (hostapd_flush(hapd)) { 346 wpa_msg(hapd->msg_ctx, MSG_WARNING, "Could not connect to " 347 "kernel driver"); 348 ret = -1; 349 } 350 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations"); 351 os_memset(addr, 0xff, ETH_ALEN); 352 hostapd_drv_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID); 353 hostapd_free_stas(hapd); 354 355 return ret; 356} 357 358 359/** 360 * hostapd_validate_bssid_configuration - Validate BSSID configuration 361 * @iface: Pointer to interface data 362 * Returns: 0 on success, -1 on failure 363 * 364 * This function is used to validate that the configured BSSIDs are valid. 365 */ 366static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface) 367{ 368 u8 mask[ETH_ALEN] = { 0 }; 369 struct hostapd_data *hapd = iface->bss[0]; 370 unsigned int i = iface->conf->num_bss, bits = 0, j; 371 int auto_addr = 0; 372 373 if (hostapd_drv_none(hapd)) 374 return 0; 375 376 /* Generate BSSID mask that is large enough to cover the BSSIDs. */ 377 378 /* Determine the bits necessary to cover the number of BSSIDs. */ 379 for (i--; i; i >>= 1) 380 bits++; 381 382 /* Determine the bits necessary to any configured BSSIDs, 383 if they are higher than the number of BSSIDs. */ 384 for (j = 0; j < iface->conf->num_bss; j++) { 385 if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) { 386 if (j) 387 auto_addr++; 388 continue; 389 } 390 391 for (i = 0; i < ETH_ALEN; i++) { 392 mask[i] |= 393 iface->conf->bss[j].bssid[i] ^ 394 hapd->own_addr[i]; 395 } 396 } 397 398 if (!auto_addr) 399 goto skip_mask_ext; 400 401 for (i = 0; i < ETH_ALEN && mask[i] == 0; i++) 402 ; 403 j = 0; 404 if (i < ETH_ALEN) { 405 j = (5 - i) * 8; 406 407 while (mask[i] != 0) { 408 mask[i] >>= 1; 409 j++; 410 } 411 } 412 413 if (bits < j) 414 bits = j; 415 416 if (bits > 40) { 417 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)", 418 bits); 419 return -1; 420 } 421 422 os_memset(mask, 0xff, ETH_ALEN); 423 j = bits / 8; 424 for (i = 5; i > 5 - j; i--) 425 mask[i] = 0; 426 j = bits % 8; 427 while (j--) 428 mask[i] <<= 1; 429 430skip_mask_ext: 431 wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)", 432 (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits); 433 434 if (!auto_addr) 435 return 0; 436 437 for (i = 0; i < ETH_ALEN; i++) { 438 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) { 439 wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR 440 " for start address " MACSTR ".", 441 MAC2STR(mask), MAC2STR(hapd->own_addr)); 442 wpa_printf(MSG_ERROR, "Start address must be the " 443 "first address in the block (i.e., addr " 444 "AND mask == addr)."); 445 return -1; 446 } 447 } 448 449 return 0; 450} 451 452 453static int mac_in_conf(struct hostapd_config *conf, const void *a) 454{ 455 size_t i; 456 457 for (i = 0; i < conf->num_bss; i++) { 458 if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) { 459 return 1; 460 } 461 } 462 463 return 0; 464} 465 466 467 468 469/** 470 * hostapd_setup_bss - Per-BSS setup (initialization) 471 * @hapd: Pointer to BSS data 472 * @first: Whether this BSS is the first BSS of an interface 473 * 474 * This function is used to initialize all per-BSS data structures and 475 * resources. This gets called in a loop for each BSS when an interface is 476 * initialized. Most of the modules that are initialized here will be 477 * deinitialized in hostapd_cleanup(). 478 */ 479static int hostapd_setup_bss(struct hostapd_data *hapd, int first) 480{ 481 struct hostapd_bss_config *conf = hapd->conf; 482 u8 ssid[HOSTAPD_MAX_SSID_LEN + 1]; 483 int ssid_len, set_ssid; 484 char force_ifname[IFNAMSIZ]; 485 u8 if_addr[ETH_ALEN]; 486 487 if (!first) { 488 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) { 489 /* Allocate the next available BSSID. */ 490 do { 491 inc_byte_array(hapd->own_addr, ETH_ALEN); 492 } while (mac_in_conf(hapd->iconf, hapd->own_addr)); 493 } else { 494 /* Allocate the configured BSSID. */ 495 os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN); 496 497 if (hostapd_mac_comp(hapd->own_addr, 498 hapd->iface->bss[0]->own_addr) == 499 0) { 500 wpa_printf(MSG_ERROR, "BSS '%s' may not have " 501 "BSSID set to the MAC address of " 502 "the radio", hapd->conf->iface); 503 return -1; 504 } 505 } 506 507 hapd->interface_added = 1; 508 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS, 509 hapd->conf->iface, hapd->own_addr, hapd, 510 &hapd->drv_priv, force_ifname, if_addr, 511 hapd->conf->bridge[0] ? hapd->conf->bridge : 512 NULL)) { 513 wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID=" 514 MACSTR ")", MAC2STR(hapd->own_addr)); 515 return -1; 516 } 517 } 518 519 if (conf->wmm_enabled < 0) 520 conf->wmm_enabled = hapd->iconf->ieee80211n; 521 522 hostapd_flush_old_stations(hapd); 523 hostapd_set_privacy(hapd, 0); 524 525 hostapd_broadcast_wep_clear(hapd); 526 if (hostapd_setup_encryption(hapd->conf->iface, hapd)) 527 return -1; 528 529 /* 530 * Fetch the SSID from the system and use it or, 531 * if one was specified in the config file, verify they 532 * match. 533 */ 534 ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid)); 535 if (ssid_len < 0) { 536 wpa_printf(MSG_ERROR, "Could not read SSID from system"); 537 return -1; 538 } 539 if (conf->ssid.ssid_set) { 540 /* 541 * If SSID is specified in the config file and it differs 542 * from what is being used then force installation of the 543 * new SSID. 544 */ 545 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len || 546 os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0); 547 } else { 548 /* 549 * No SSID in the config file; just use the one we got 550 * from the system. 551 */ 552 set_ssid = 0; 553 conf->ssid.ssid_len = ssid_len; 554 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len); 555 conf->ssid.ssid[conf->ssid.ssid_len] = '\0'; 556 } 557 558 if (!hostapd_drv_none(hapd)) { 559 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR 560 " and ssid '%s'", 561 hapd->conf->iface, MAC2STR(hapd->own_addr), 562 hapd->conf->ssid.ssid); 563 } 564 565 if (hostapd_setup_wpa_psk(conf)) { 566 wpa_printf(MSG_ERROR, "WPA-PSK setup failed."); 567 return -1; 568 } 569 570 /* Set SSID for the kernel driver (to be used in beacon and probe 571 * response frames) */ 572 if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid, 573 conf->ssid.ssid_len)) { 574 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver"); 575 return -1; 576 } 577 578 if (wpa_debug_level == MSG_MSGDUMP) 579 conf->radius->msg_dumps = 1; 580#ifndef CONFIG_NO_RADIUS 581 hapd->radius = radius_client_init(hapd, conf->radius); 582 if (hapd->radius == NULL) { 583 wpa_printf(MSG_ERROR, "RADIUS client initialization failed."); 584 return -1; 585 } 586#endif /* CONFIG_NO_RADIUS */ 587 588 if (hostapd_acl_init(hapd)) { 589 wpa_printf(MSG_ERROR, "ACL initialization failed."); 590 return -1; 591 } 592 if (hostapd_init_wps(hapd, conf)) 593 return -1; 594 595 if (authsrv_init(hapd) < 0) 596 return -1; 597 598 if (ieee802_1x_init(hapd)) { 599 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed."); 600 return -1; 601 } 602 603 if (hapd->conf->wpa && hostapd_setup_wpa(hapd)) 604 return -1; 605 606 if (accounting_init(hapd)) { 607 wpa_printf(MSG_ERROR, "Accounting initialization failed."); 608 return -1; 609 } 610 611 if (hapd->conf->ieee802_11f && 612 (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) { 613 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization " 614 "failed."); 615 return -1; 616 } 617 618 if (hapd->iface->ctrl_iface_init && 619 hapd->iface->ctrl_iface_init(hapd)) { 620 wpa_printf(MSG_ERROR, "Failed to setup control interface"); 621 return -1; 622 } 623 624 if (!hostapd_drv_none(hapd) && vlan_init(hapd)) { 625 wpa_printf(MSG_ERROR, "VLAN initialization failed."); 626 return -1; 627 } 628 629 ieee802_11_set_beacon(hapd); 630 631 if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0) 632 return -1; 633 634 if (hapd->driver && hapd->driver->set_operstate) 635 hapd->driver->set_operstate(hapd->drv_priv, 1); 636 637 return 0; 638} 639 640 641static void hostapd_tx_queue_params(struct hostapd_iface *iface) 642{ 643 struct hostapd_data *hapd = iface->bss[0]; 644 int i; 645 struct hostapd_tx_queue_params *p; 646 647 for (i = 0; i < NUM_TX_QUEUES; i++) { 648 p = &iface->conf->tx_queue[i]; 649 650 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin, 651 p->cwmax, p->burst)) { 652 wpa_printf(MSG_DEBUG, "Failed to set TX queue " 653 "parameters for queue %d.", i); 654 /* Continue anyway */ 655 } 656 } 657} 658 659 660static int setup_interface(struct hostapd_iface *iface) 661{ 662 struct hostapd_data *hapd = iface->bss[0]; 663 size_t i; 664 char country[4]; 665 666 /* 667 * Make sure that all BSSes get configured with a pointer to the same 668 * driver interface. 669 */ 670 for (i = 1; i < iface->num_bss; i++) { 671 iface->bss[i]->driver = hapd->driver; 672 iface->bss[i]->drv_priv = hapd->drv_priv; 673 } 674 675 if (hostapd_validate_bssid_configuration(iface)) 676 return -1; 677 678 if (hapd->iconf->country[0] && hapd->iconf->country[1]) { 679 os_memcpy(country, hapd->iconf->country, 3); 680 country[3] = '\0'; 681 if (hostapd_set_country(hapd, country) < 0) { 682 wpa_printf(MSG_ERROR, "Failed to set country code"); 683 return -1; 684 } 685 } 686 687 if (hostapd_get_hw_features(iface)) { 688 /* Not all drivers support this yet, so continue without hw 689 * feature data. */ 690 } else { 691 int ret = hostapd_select_hw_mode(iface); 692 if (ret < 0) { 693 wpa_printf(MSG_ERROR, "Could not select hw_mode and " 694 "channel. (%d)", ret); 695 return -1; 696 } 697 ret = hostapd_check_ht_capab(iface); 698 if (ret < 0) 699 return -1; 700 if (ret == 1) { 701 wpa_printf(MSG_DEBUG, "Interface initialization will " 702 "be completed in a callback"); 703 return 0; 704 } 705 } 706 return hostapd_setup_interface_complete(iface, 0); 707} 708 709 710int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err) 711{ 712 struct hostapd_data *hapd = iface->bss[0]; 713 size_t j; 714 u8 *prev_addr; 715 716 if (err) { 717 wpa_printf(MSG_ERROR, "Interface initialization failed"); 718 eloop_terminate(); 719 return -1; 720 } 721 722 wpa_printf(MSG_DEBUG, "Completing interface initialization"); 723 if (hapd->iconf->channel) { 724 iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel); 725 wpa_printf(MSG_DEBUG, "Mode: %s Channel: %d " 726 "Frequency: %d MHz", 727 hostapd_hw_mode_txt(hapd->iconf->hw_mode), 728 hapd->iconf->channel, iface->freq); 729 730 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq, 731 hapd->iconf->channel, 732 hapd->iconf->ieee80211n, 733 hapd->iconf->secondary_channel)) { 734 wpa_printf(MSG_ERROR, "Could not set channel for " 735 "kernel driver"); 736 return -1; 737 } 738 } 739 740 if (iface->current_mode) { 741 if (hostapd_prepare_rates(iface, iface->current_mode)) { 742 wpa_printf(MSG_ERROR, "Failed to prepare rates " 743 "table."); 744 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211, 745 HOSTAPD_LEVEL_WARNING, 746 "Failed to prepare rates table."); 747 return -1; 748 } 749 } 750 751 if (hapd->iconf->rts_threshold > -1 && 752 hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) { 753 wpa_printf(MSG_ERROR, "Could not set RTS threshold for " 754 "kernel driver"); 755 return -1; 756 } 757 758 if (hapd->iconf->fragm_threshold > -1 && 759 hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) { 760 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold " 761 "for kernel driver"); 762 return -1; 763 } 764 765 prev_addr = hapd->own_addr; 766 767 for (j = 0; j < iface->num_bss; j++) { 768 hapd = iface->bss[j]; 769 if (j) 770 os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN); 771 if (hostapd_setup_bss(hapd, j == 0)) 772 return -1; 773 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) 774 prev_addr = hapd->own_addr; 775 } 776 777 hostapd_tx_queue_params(iface); 778 779 ap_list_init(iface); 780 781 if (hostapd_driver_commit(hapd) < 0) { 782 wpa_printf(MSG_ERROR, "%s: Failed to commit driver " 783 "configuration", __func__); 784 return -1; 785 } 786 787 /* 788 * WPS UPnP module can be initialized only when the "upnp_iface" is up. 789 * If "interface" and "upnp_iface" are the same (e.g., non-bridge 790 * mode), the interface is up only after driver_commit, so initialize 791 * WPS after driver_commit. 792 */ 793 for (j = 0; j < iface->num_bss; j++) { 794 if (hostapd_init_wps_complete(iface->bss[j])) 795 return -1; 796 } 797 798 if (hapd->setup_complete_cb) 799 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx); 800 801 wpa_printf(MSG_DEBUG, "%s: Setup of interface done.", 802 iface->bss[0]->conf->iface); 803 804 return 0; 805} 806 807 808/** 809 * hostapd_setup_interface - Setup of an interface 810 * @iface: Pointer to interface data. 811 * Returns: 0 on success, -1 on failure 812 * 813 * Initializes the driver interface, validates the configuration, 814 * and sets driver parameters based on the configuration. 815 * Flushes old stations, sets the channel, encryption, 816 * beacons, and WDS links based on the configuration. 817 */ 818int hostapd_setup_interface(struct hostapd_iface *iface) 819{ 820 int ret; 821 822 ret = setup_interface(iface); 823 if (ret) { 824 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.", 825 iface->bss[0]->conf->iface); 826 return -1; 827 } 828 829 return 0; 830} 831 832 833/** 834 * hostapd_alloc_bss_data - Allocate and initialize per-BSS data 835 * @hapd_iface: Pointer to interface data 836 * @conf: Pointer to per-interface configuration 837 * @bss: Pointer to per-BSS configuration for this BSS 838 * Returns: Pointer to allocated BSS data 839 * 840 * This function is used to allocate per-BSS data structure. This data will be 841 * freed after hostapd_cleanup() is called for it during interface 842 * deinitialization. 843 */ 844struct hostapd_data * 845hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface, 846 struct hostapd_config *conf, 847 struct hostapd_bss_config *bss) 848{ 849 struct hostapd_data *hapd; 850 851 hapd = os_zalloc(sizeof(*hapd)); 852 if (hapd == NULL) 853 return NULL; 854 855 hapd->new_assoc_sta_cb = hostapd_new_assoc_sta; 856 hapd->iconf = conf; 857 hapd->conf = bss; 858 hapd->iface = hapd_iface; 859 hapd->driver = hapd->iconf->driver; 860 861 return hapd; 862} 863 864 865void hostapd_interface_deinit(struct hostapd_iface *iface) 866{ 867 size_t j; 868 869 if (iface == NULL) 870 return; 871 872 hostapd_cleanup_iface_pre(iface); 873 for (j = 0; j < iface->num_bss; j++) { 874 struct hostapd_data *hapd = iface->bss[j]; 875 hostapd_free_stas(hapd); 876 hostapd_flush_old_stations(hapd); 877 hostapd_cleanup(hapd); 878 } 879} 880 881 882void hostapd_interface_free(struct hostapd_iface *iface) 883{ 884 size_t j; 885 for (j = 0; j < iface->num_bss; j++) 886 os_free(iface->bss[j]); 887 hostapd_cleanup_iface(iface); 888} 889 890 891/** 892 * hostapd_new_assoc_sta - Notify that a new station associated with the AP 893 * @hapd: Pointer to BSS data 894 * @sta: Pointer to the associated STA data 895 * @reassoc: 1 to indicate this was a re-association; 0 = first association 896 * 897 * This function will be called whenever a station associates with the AP. It 898 * can be called from ieee802_11.c for drivers that export MLME to hostapd and 899 * from drv_callbacks.c based on driver events for drivers that take care of 900 * management frames (IEEE 802.11 authentication and association) internally. 901 */ 902void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta, 903 int reassoc) 904{ 905 if (hapd->tkip_countermeasures) { 906 hostapd_drv_sta_deauth(hapd, sta->addr, 907 WLAN_REASON_MICHAEL_MIC_FAILURE); 908 return; 909 } 910 911 hostapd_prune_associations(hapd, sta->addr); 912 913 /* IEEE 802.11F (IAPP) */ 914 if (hapd->conf->ieee802_11f) 915 iapp_new_station(hapd->iapp, sta); 916 917#ifdef CONFIG_P2P 918 if (sta->p2p_ie == NULL && !sta->no_p2p_set) { 919 sta->no_p2p_set = 1; 920 hapd->num_sta_no_p2p++; 921 if (hapd->num_sta_no_p2p == 1) 922 hostapd_p2p_non_p2p_sta_connected(hapd); 923 } 924#endif /* CONFIG_P2P */ 925 926 /* Start accounting here, if IEEE 802.1X and WPA are not used. 927 * IEEE 802.1X/WPA code will start accounting after the station has 928 * been authorized. */ 929 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa) 930 accounting_sta_start(hapd, sta); 931 932 /* Start IEEE 802.1X authentication process for new stations */ 933 ieee802_1x_new_station(hapd, sta); 934 if (reassoc) { 935 if (sta->auth_alg != WLAN_AUTH_FT && 936 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) 937 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH); 938 } else 939 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm); 940} 941