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)
 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);
 205 }
 206
 207
 208 static int ap_driver_set_beacon_int(void *priv, int value)
 209 {
 210         struct ap_driver_data *drv = priv;
 211         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 212         return wpa_drv_set_beacon_int(wpa_s, value);
 213 }
 214
 215
 216 static int ap_driver_set_cts_protect(void *priv, int value)
 217 {
 218         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 219         return -1;
 220 }
 221
 222
 223 static int ap_driver_set_preamble(void *priv, int value)
 224 {
 225         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 226         return -1;
 227 }
 228
 229
 230 static int ap_driver_set_short_slot_time(void *priv, int value)
 231 {
 232         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 233         return -1;
 234 }
 235
 236
 237 static int ap_driver_set_tx_queue_params(void *priv, int queue, int aifs,
 238                                          int cw_min, int cw_max,
 239                                          int burst_time)
 240 {
 241         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 242         return -1;
 243 }
 244
 245
 246 static struct hostapd_hw_modes *ap_driver_get_hw_feature_data(void *priv,
 247                                                               u16 *num_modes,
 248                                                               u16 *flags)
 249 {
 250         struct ap_driver_data *drv = priv;
 251         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 252         return wpa_drv_get_hw_feature_data(wpa_s, num_modes, flags);
 253 }
 254
 255
 256 static int ap_driver_hapd_send_eapol(void *priv, const u8 *addr,
 257                                      const u8 *data, size_t data_len,
 258                                      int encrypt, const u8 *own_addr)
 259 {
 260         struct ap_driver_data *drv = priv;
 261         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 262         return wpa_drv_hapd_send_eapol(wpa_s, addr, data, data_len, encrypt,
 263                                        own_addr);
 264 }
 265
 266
 267 struct wpa_driver_ops ap_driver_ops =
 268 {
 269         .name = "wpa_supplicant",
 270         .hapd_init = ap_driver_init,
 271         .hapd_deinit = ap_driver_deinit,
 272         .send_ether = ap_driver_send_ether,
 273         .hapd_set_key = ap_driver_set_key,
 274         .get_seqnum = ap_driver_get_seqnum,
 275         .flush = ap_driver_flush,
 276         .read_sta_data = ap_driver_read_sta_data,
 277         .sta_set_flags = ap_driver_sta_set_flags,
 278         .sta_deauth = ap_driver_sta_deauth,
 279         .sta_disassoc = ap_driver_sta_disassoc,
 280         .sta_remove = ap_driver_sta_remove,
 281         .send_mlme = ap_driver_send_mlme,
 282         .sta_add = ap_driver_sta_add,
 283         .get_inact_sec = ap_driver_get_inact_sec,
 284         .set_freq = ap_driver_set_freq,
 285         .hapd_set_beacon = ap_driver_set_beacon,
 286         .set_beacon_int = ap_driver_set_beacon_int,
 287         .set_cts_protect = ap_driver_set_cts_protect,
 288         .set_preamble = ap_driver_set_preamble,
 289         .set_short_slot_time = ap_driver_set_short_slot_time,
 290         .set_tx_queue_params = ap_driver_set_tx_queue_params,
 291         .get_hw_feature_data = ap_driver_get_hw_feature_data,
 292         .hapd_send_eapol = ap_driver_hapd_send_eapol,
 293 };
 294
 295
 296 extern struct wpa_driver_ops *wpa_drivers[];
 297
 298 static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
 299                                   struct wpa_ssid *ssid,
 300                                   struct hostapd_config *conf)
 301 {
 302         struct hostapd_bss_config *bss = &conf->bss[0];
 303         int j, pairwise;
 304
 305         for (j = 0; wpa_drivers[j]; j++) {
 306                 if (os_strcmp("wpa_supplicant", wpa_drivers[j]->name) == 0) {
 307                         conf->driver = wpa_drivers[j];
 308                         break;
 309                 }
 310         }
 311         if (conf->driver == NULL) {
 312                 wpa_printf(MSG_ERROR, "No AP driver ops found");
 313                 return -1;
 314         }
 315
 316         os_strlcpy(bss->iface, wpa_s->ifname, sizeof(bss->iface));
 317
 318         if (ssid->frequency == 0) {
 319                 /* default channel 11 */
 320                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 321                 conf->channel = 11;
 322         } else if (ssid->frequency >= 2412 && ssid->frequency <= 2472) {
 323                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 324                 conf->channel = (ssid->frequency - 2407) / 5;
 325         } else if ((ssid->frequency >= 5180 && ssid->frequency <= 5240) ||
 326                    (ssid->frequency >= 5745 && ssid->frequency <= 5825)) {
 327                 conf->hw_mode = HOSTAPD_MODE_IEEE80211A;
 328                 conf->channel = (ssid->frequency - 5000) / 5;
 329         } else {
 330                 wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: %d MHz",
 331                            ssid->frequency);
 332                 return -1;
 333         }
 334
 335         /* TODO: enable HT if driver supports it;
 336          * drop to 11b if driver does not support 11g */
 337
 338         if (ssid->ssid_len == 0) {
 339                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 340                 return -1;
 341         }
 342         os_memcpy(bss->ssid.ssid, ssid->ssid, ssid->ssid_len);
 343         bss->ssid.ssid[ssid->ssid_len] = '\0';
 344         bss->ssid.ssid_len = ssid->ssid_len;
 345         bss->ssid.ssid_set = 1;
 346
 347         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt))
 348                 bss->wpa = ssid->proto;
 349         bss->wpa_key_mgmt = ssid->key_mgmt;
 350         bss->wpa_pairwise = ssid->pairwise_cipher;
 351         if (ssid->passphrase) {
 352                 bss->ssid.wpa_passphrase = os_strdup(ssid->passphrase);
 353         } else if (ssid->psk_set) {
 354                 os_free(bss->ssid.wpa_psk);
 355                 bss->ssid.wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 356                 if (bss->ssid.wpa_psk == NULL)
 357                         return -1;
 358                 os_memcpy(bss->ssid.wpa_psk->psk, ssid->psk, PMK_LEN);
 359                 bss->ssid.wpa_psk->group = 1;
 360         }
 361
 362         /* Select group cipher based on the enabled pairwise cipher suites */
 363         pairwise = 0;
 364         if (bss->wpa & 1)
 365                 pairwise |= bss->wpa_pairwise;
 366         if (bss->wpa & 2) {
 367                 if (bss->rsn_pairwise == 0)
 368                         bss->rsn_pairwise = bss->wpa_pairwise;
 369                 pairwise |= bss->rsn_pairwise;
 370         }
 371         if (pairwise & WPA_CIPHER_TKIP)
 372                 bss->wpa_group = WPA_CIPHER_TKIP;
 373         else
 374                 bss->wpa_group = WPA_CIPHER_CCMP;
 375
 376         if (bss->wpa && bss->ieee802_1x)
 377                 bss->ssid.security_policy = SECURITY_WPA;
 378         else if (bss->wpa)
 379                 bss->ssid.security_policy = SECURITY_WPA_PSK;
 380         else if (bss->ieee802_1x) {
 381                 bss->ssid.security_policy = SECURITY_IEEE_802_1X;
 382                 bss->ssid.wep.default_len = bss->default_wep_key_len;
 383         } else if (bss->ssid.wep.keys_set)
 384                 bss->ssid.security_policy = SECURITY_STATIC_WEP;
 385         else
 386                 bss->ssid.security_policy = SECURITY_PLAINTEXT;
 387
 388 #ifdef CONFIG_WPS
 389         /*
 390          * Enable WPS by default, but require user interaction to actually use
 391          * it. Only the internal Registrar is supported.
 392          */
 393         bss->eap_server = 1;
 394         bss->wps_state = 2;
 395         bss->ap_setup_locked = 1;
 396         bss->config_methods = os_strdup("display push_button");
 397 #endif /* CONFIG_WPS */
 398
 399         return 0;
 400 }
 401
 402
 403 int wpa_supplicant_create_ap(struct wpa_supplicant *wpa_s,
 404                              struct wpa_ssid *ssid)
 405 {
 406         struct wpa_driver_associate_params params;
 407         struct hostapd_iface *hapd_iface;
 408         struct hostapd_config *conf;
 409         size_t i;
 410
 411         if (ssid->ssid == NULL || ssid->ssid_len == 0) {
 412                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 413                 return -1;
 414         }
 415
 416         wpa_supplicant_ap_deinit(wpa_s);
 417
 418         wpa_printf(MSG_DEBUG, "Setting up AP (SSID='%s')",
 419                    wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 420
 421         os_memset(&params, 0, sizeof(params));
 422         params.ssid = ssid->ssid;
 423         params.ssid_len = ssid->ssid_len;
 424         params.mode = ssid->mode;
 425         params.freq = ssid->frequency;
 426
 427         if (wpa_drv_associate(wpa_s, &params) < 0) {
 428                 wpa_msg(wpa_s, MSG_INFO, "Failed to start AP functionality");
 429                 return -1;
 430         }
 431
 432         wpa_s->ap_iface = hapd_iface = os_zalloc(sizeof(*wpa_s->ap_iface));
 433         if (hapd_iface == NULL)
 434                 return -1;
 435         hapd_iface->owner = wpa_s;
 436
 437         wpa_s->ap_iface->conf = conf = hostapd_config_defaults();
 438         if (conf == NULL) {
 439                 wpa_supplicant_ap_deinit(wpa_s);
 440                 return -1;
 441         }
 442
 443         if (wpa_supplicant_conf_ap(wpa_s, ssid, conf)) {
 444                 wpa_printf(MSG_ERROR, "Failed to create AP configuration");
 445                 wpa_supplicant_ap_deinit(wpa_s);
 446                 return -1;
 447         }
 448
 449         hapd_iface->num_bss = conf->num_bss;
 450         hapd_iface->bss = os_zalloc(conf->num_bss *
 451                                     sizeof(struct hostapd_data *));
 452         if (hapd_iface->bss == NULL) {
 453                 wpa_supplicant_ap_deinit(wpa_s);
 454                 return -1;
 455         }
 456
 457         for (i = 0; i < conf->num_bss; i++) {
 458                 hapd_iface->bss[i] =
 459                         hostapd_alloc_bss_data(hapd_iface, conf,
 460                                                &conf->bss[i]);
 461                 if (hapd_iface->bss[i] == NULL) {
 462                         wpa_supplicant_ap_deinit(wpa_s);
 463                         return -1;
 464                 }
 465
 466                 hapd_iface->bss[i]->msg_ctx = wpa_s;
 467         }
 468
 469         if (hostapd_setup_interface(wpa_s->ap_iface)) {
 470                 wpa_printf(MSG_ERROR, "Failed to initialize AP interface");
 471                 wpa_supplicant_ap_deinit(wpa_s);
 472                 return -1;
 473         }
 474
 475         wpa_s->current_ssid = ssid;
 476         os_memcpy(wpa_s->bssid, wpa_s->own_addr, ETH_ALEN);
 477         wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 478
 479         return 0;
 480 }
 481
 482
 483 void wpa_supplicant_ap_deinit(struct wpa_supplicant *wpa_s)
 484 {
 485         if (wpa_s->ap_iface == NULL)
 486                 return;
 487
 488         hostapd_interface_deinit(wpa_s->ap_iface);
 489         wpa_s->ap_iface = NULL;
 490 }
 491
 492
 493 void ap_tx_status(void *ctx, const u8 *addr,
 494                   const u8 *buf, size_t len, int ack)
 495 {
 496         struct wpa_supplicant *wpa_s = ctx;
 497         hostapd_tx_status(wpa_s->ap_iface->bss[0], addr, buf, len, ack);
 498 }
 499
 500
 501 void ap_rx_from_unknown_sta(void *ctx, struct ieee80211_hdr *hdr, size_t len)
 502 {
 503         struct wpa_supplicant *wpa_s = ctx;
 504         hostapd_rx_from_unknown_sta(wpa_s->ap_iface->bss[0], hdr, len);
 505 }
 506
 507
 508 #ifdef NEED_AP_MLME
 509 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
 510                 struct hostapd_frame_info *fi)
 511 {
 512         struct wpa_supplicant *wpa_s = ctx;
 513         ieee802_11_mgmt(wpa_s->ap_iface->bss[0], buf, len, stype, fi);
 514 }
 515
 516
 517 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok)
 518 {
 519         struct wpa_supplicant *wpa_s = ctx;
 520         ieee802_11_mgmt_cb(wpa_s->ap_iface->bss[0], buf, len, stype, ok);
 521 }
 522 #endif /* NEED_AP_MLME */
 523
 524
 525 void wpa_supplicant_ap_rx_eapol(struct wpa_supplicant *wpa_s,
 526                                 const u8 *src_addr, const u8 *buf, size_t len)
 527 {
 528         hostapd_eapol_receive(wpa_s->ap_iface->bss[0], src_addr, buf, len);
 529 }
 530
 531
 532 #ifdef CONFIG_WPS
 533
 534 int wpa_supplicant_ap_wps_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 535 {
 536         return hostapd_wps_button_pushed(wpa_s->ap_iface->bss[0]);
 537 }
 538
 539
 540 int wpa_supplicant_ap_wps_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 541                               const char *pin, char *buf, size_t buflen)
 542 {
 543         int ret, ret_len = 0;
 544
 545         if (pin == NULL) {
 546                 unsigned int rpin = wps_generate_pin();
 547                 ret_len = os_snprintf(buf, buflen, "%d", rpin);
 548                 pin = buf;
 549         }
 550
 551         ret = hostapd_wps_add_pin(wpa_s->ap_iface->bss[0], "any", pin, 0);
 552         if (ret)
 553                 return -1;
 554         return ret_len;
 555 }
 556
 557 #endif /* CONFIG_WPS */
 558
 559
 560 #ifdef CONFIG_CTRL_IFACE
 561
 562 int ap_ctrl_iface_sta_first(struct wpa_supplicant *wpa_s,
 563                             char *buf, size_t buflen)
 564 {
 565         if (wpa_s->ap_iface == NULL)
 566                 return -1;
 567         return hostapd_ctrl_iface_sta_first(wpa_s->ap_iface->bss[0],
 568                                             buf, buflen);
 569 }
 570
 571
 572 int ap_ctrl_iface_sta(struct wpa_supplicant *wpa_s, const char *txtaddr,
 573                       char *buf, size_t buflen)
 574 {
 575         if (wpa_s->ap_iface == NULL)
 576                 return -1;
 577         return hostapd_ctrl_iface_sta(wpa_s->ap_iface->bss[0], txtaddr,
 578                                       buf, buflen);
 579 }
 580
 581
 582 int ap_ctrl_iface_sta_next(struct wpa_supplicant *wpa_s, const char *txtaddr,
 583                            char *buf, size_t buflen)
 584 {
 585         if (wpa_s->ap_iface == NULL)
 586                 return -1;
 587         return hostapd_ctrl_iface_sta_next(wpa_s->ap_iface->bss[0], txtaddr,
 588                                            buf, buflen);
 589 }
 590
 591
 592 int ap_ctrl_iface_wpa_get_status(struct wpa_supplicant *wpa_s, char *buf,
 593                                  size_t buflen, int verbose)
 594 {
 595         char *pos = buf, *end = buf + buflen;
 596         int ret;
 597         struct hostapd_bss_config *conf;
 598
 599         if (wpa_s->ap_iface == NULL)
 600                 return -1;
 601
 602         conf = wpa_s->ap_iface->bss[0]->conf;
 603         if (conf->wpa == 0)
 604                 return 0;
 605
 606         ret = os_snprintf(pos, end - pos,
 607                           "pairwise_cipher=%s\n"
 608                           "group_cipher=%s\n"
 609                           "key_mgmt=%s\n",
 610                           wpa_cipher_txt(conf->rsn_pairwise),
 611                           wpa_cipher_txt(conf->wpa_group),
 612                           wpa_key_mgmt_txt(conf->wpa_key_mgmt,
 613                                            conf->wpa));
 614         if (ret < 0 || ret >= end - pos)
 615                 return pos - buf;
 616         pos += ret;
 617         return pos - buf;
 618 }
 619
 620 #endif /* CONFIG_CTRL_IFACE */