wpa_supplicant/ap.c

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