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_MLME
  22 #include "../hostapd/ieee802_11.h"
  23 #endif /* NEED_MLME */
  24 #include "eap_common/eap_defs.h"
  25 #include "eap_server/eap_methods.h"
  26 #include "eap_common/eap_wsc_common.h"
  27 #include "config_ssid.h"
  28 #include "wpa_supplicant_i.h"
  29 #include "driver_i.h"
  30 #include "ap.h"
  31
  32
  33 int hostapd_for_each_interface(int (*cb)(struct hostapd_iface *iface,
  34                                          void *ctx), void *ctx)
  35 {
  36         /* TODO */
  37         return 0;
  38 }
  39
  40
  41 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
  42 {
  43         return 0;
  44 }
  45
  46
  47 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
  48 {
  49 }
  50
  51
  52 struct ap_driver_data {
  53         struct hostapd_data *hapd;
  54 };
  55
  56
  57 static void * ap_driver_init(struct hostapd_data *hapd,
  58                              struct wpa_init_params *params)
  59 {
  60         struct ap_driver_data *drv;
  61         struct wpa_supplicant *wpa_s = hapd->iface->owner;
  62
  63         drv = os_zalloc(sizeof(struct ap_driver_data));
  64         if (drv == NULL) {
  65                 wpa_printf(MSG_ERROR, "Could not allocate memory for AP "
  66                            "driver data");
  67                 return NULL;
  68         }
  69         drv->hapd = hapd;
  70         os_memcpy(hapd->own_addr, wpa_s->own_addr, ETH_ALEN);
  71
  72         return drv;
  73 }
  74
  75
  76 static void ap_driver_deinit(void *priv)
  77 {
  78         struct ap_driver_data *drv = priv;
  79
  80         os_free(drv);
  81 }
  82
  83
  84 static int ap_driver_send_ether(void *priv, const u8 *dst, const u8 *src,
  85                                 u16 proto, const u8 *data, size_t data_len)
  86 {
  87         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
  88         return -1;
  89 }
  90
  91
  92 static int ap_driver_set_key(const char *iface, void *priv, wpa_alg alg,
  93                              const u8 *addr, int key_idx, int set_tx,
  94                              const u8 *seq, size_t seq_len, const u8 *key,
  95                              size_t key_len)
  96 {
  97         struct ap_driver_data *drv = priv;
  98         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
  99         return wpa_drv_set_key(wpa_s, alg, addr, key_idx, set_tx, seq, seq_len,
 100                                key, key_len);
 101 }
 102
 103
 104 static int ap_driver_get_seqnum(const char *iface, void *priv, const u8 *addr,
 105                                 int idx, u8 *seq)
 106 {
 107         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 108         return -1;
 109 }
 110
 111
 112 static int ap_driver_flush(void *priv)
 113 {
 114         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 115         return -1;
 116 }
 117
 118
 119 static int ap_driver_read_sta_data(void *priv,
 120                                    struct hostap_sta_driver_data *data,
 121                                    const u8 *addr)
 122 {
 123         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 124         return -1;
 125 }
 126
 127
 128 static int ap_driver_sta_set_flags(void *priv, const u8 *addr, int total_flags,
 129                                    int flags_or, int flags_and)
 130 {
 131         struct ap_driver_data *drv = priv;
 132         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 133         return wpa_drv_sta_set_flags(wpa_s, addr, total_flags, flags_or,
 134                                      flags_and);
 135 }
 136
 137
 138 static int ap_driver_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
 139                                 int reason)
 140 {
 141         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 142         return -1;
 143 }
 144
 145
 146 static int ap_driver_sta_disassoc(void *priv, const u8 *own_addr,
 147                                   const u8 *addr, int reason)
 148 {
 149         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 150         return -1;
 151 }
 152
 153
 154 static int ap_driver_sta_remove(void *priv, const u8 *addr)
 155 {
 156         struct ap_driver_data *drv = priv;
 157         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 158         return wpa_drv_sta_remove(wpa_s, addr);
 159 }
 160
 161
 162 static int ap_driver_send_mlme(void *priv, const u8 *data, size_t len)
 163 {
 164         struct ap_driver_data *drv = priv;
 165         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 166         return wpa_drv_send_mlme(wpa_s, data, len);
 167 }
 168
 169
 170 static int ap_driver_sta_add(const char *ifname, void *priv,
 171                              struct hostapd_sta_add_params *params)
 172 {
 173         struct ap_driver_data *drv = priv;
 174         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 175         return wpa_drv_sta_add(wpa_s, params);
 176 }
 177
 178
 179 static int ap_driver_get_inact_sec(void *priv, const u8 *addr)
 180 {
 181         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 182         return -1;
 183 }
 184
 185
 186 static int ap_driver_set_freq(void *priv, struct hostapd_freq_params *freq)
 187 {
 188         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 189         return 0;
 190 }
 191
 192
 193 static int ap_driver_set_beacon(const char *iface, void *priv,
 194                                 const u8 *head, size_t head_len,
 195                                 const u8 *tail, size_t tail_len,
 196                                 int dtim_period)
 197 {
 198         struct ap_driver_data *drv = priv;
 199         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 200         return wpa_drv_set_beacon(wpa_s, head, head_len, tail, tail_len,
 201                                   dtim_period);
 202 }
 203
 204
 205 static int ap_driver_set_beacon_int(void *priv, int value)
 206 {
 207         struct ap_driver_data *drv = priv;
 208         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 209         return wpa_drv_set_beacon_int(wpa_s, value);
 210 }
 211
 212
 213 static int ap_driver_set_cts_protect(void *priv, int value)
 214 {
 215         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 216         return -1;
 217 }
 218
 219
 220 static int ap_driver_set_preamble(void *priv, int value)
 221 {
 222         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 223         return -1;
 224 }
 225
 226
 227 static int ap_driver_set_short_slot_time(void *priv, int value)
 228 {
 229         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 230         return -1;
 231 }
 232
 233
 234 static int ap_driver_set_tx_queue_params(void *priv, int queue, int aifs,
 235                                          int cw_min, int cw_max,
 236                                          int burst_time)
 237 {
 238         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 239         return -1;
 240 }
 241
 242
 243 static struct hostapd_hw_modes *ap_driver_get_hw_feature_data(void *priv,
 244                                                               u16 *num_modes,
 245                                                               u16 *flags)
 246 {
 247         struct ap_driver_data *drv = priv;
 248         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 249         return wpa_drv_get_hw_feature_data(wpa_s, num_modes, flags);
 250 }
 251
 252
 253 static int ap_driver_hapd_send_eapol(void *priv, const u8 *addr,
 254                                      const u8 *data, size_t data_len,
 255                                      int encrypt, const u8 *own_addr)
 256 {
 257         struct ap_driver_data *drv = priv;
 258         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 259         return wpa_drv_hapd_send_eapol(wpa_s, addr, data, data_len, encrypt,
 260                                        own_addr);
 261 }
 262
 263
 264 struct wpa_driver_ops ap_driver_ops =
 265 {
 266         .name = "wpa_supplicant",
 267         .hapd_init = ap_driver_init,
 268         .hapd_deinit = ap_driver_deinit,
 269         .send_ether = ap_driver_send_ether,
 270         .hapd_set_key = ap_driver_set_key,
 271         .get_seqnum = ap_driver_get_seqnum,
 272         .flush = ap_driver_flush,
 273         .read_sta_data = ap_driver_read_sta_data,
 274         .sta_set_flags = ap_driver_sta_set_flags,
 275         .sta_deauth = ap_driver_sta_deauth,
 276         .sta_disassoc = ap_driver_sta_disassoc,
 277         .sta_remove = ap_driver_sta_remove,
 278         .send_mlme = ap_driver_send_mlme,
 279         .sta_add = ap_driver_sta_add,
 280         .get_inact_sec = ap_driver_get_inact_sec,
 281         .set_freq = ap_driver_set_freq,
 282         .hapd_set_beacon = ap_driver_set_beacon,
 283         .set_beacon_int = ap_driver_set_beacon_int,
 284         .set_cts_protect = ap_driver_set_cts_protect,
 285         .set_preamble = ap_driver_set_preamble,
 286         .set_short_slot_time = ap_driver_set_short_slot_time,
 287         .set_tx_queue_params = ap_driver_set_tx_queue_params,
 288         .get_hw_feature_data = ap_driver_get_hw_feature_data,
 289         .hapd_send_eapol = ap_driver_hapd_send_eapol,
 290 };
 291
 292
 293 extern struct wpa_driver_ops *wpa_drivers[];
 294
 295 static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
 296                                   struct wpa_ssid *ssid,
 297                                   struct hostapd_config *conf)
 298 {
 299         struct hostapd_bss_config *bss = &conf->bss[0];
 300         int j, pairwise;
 301
 302         for (j = 0; wpa_drivers[j]; j++) {
 303                 if (os_strcmp("wpa_supplicant", wpa_drivers[j]->name) == 0) {
 304                         conf->driver = wpa_drivers[j];
 305                         break;
 306                 }
 307         }
 308         if (conf->driver == NULL) {
 309                 wpa_printf(MSG_ERROR, "No AP driver ops found");
 310                 return -1;
 311         }
 312
 313         os_strlcpy(bss->iface, wpa_s->ifname, sizeof(bss->iface));
 314
 315         if (ssid->frequency == 0) {
 316                 /* default channel 11 */
 317                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 318                 conf->channel = 11;
 319         } else if (ssid->frequency >= 2412 && ssid->frequency <= 2472) {
 320                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 321                 conf->channel = (ssid->frequency - 2407) / 5;
 322         } else if ((ssid->frequency >= 5180 && ssid->frequency <= 5240) ||
 323                    (ssid->frequency >= 5745 && ssid->frequency <= 5825)) {
 324                 conf->hw_mode = HOSTAPD_MODE_IEEE80211A;
 325                 conf->channel = (ssid->frequency - 5000) / 5;
 326         } else {
 327                 wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: %d MHz",
 328                            ssid->frequency);
 329                 return -1;
 330         }
 331
 332         /* TODO: enable HT if driver supports it;
 333          * drop to 11b if driver does not support 11g */
 334
 335         if (ssid->ssid_len == 0) {
 336                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 337                 return -1;
 338         }
 339         os_memcpy(bss->ssid.ssid, ssid->ssid, ssid->ssid_len);
 340         bss->ssid.ssid[ssid->ssid_len] = '\0';
 341         bss->ssid.ssid_len = ssid->ssid_len;
 342         bss->ssid.ssid_set = 1;
 343
 344         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt))
 345                 bss->wpa = ssid->proto;
 346         bss->wpa_key_mgmt = ssid->key_mgmt;
 347         bss->wpa_pairwise = ssid->pairwise_cipher;
 348         if (ssid->passphrase) {
 349                 bss->ssid.wpa_passphrase = os_strdup(ssid->passphrase);
 350         } else if (ssid->psk_set) {
 351                 os_free(bss->ssid.wpa_psk);
 352                 bss->ssid.wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 353                 if (bss->ssid.wpa_psk == NULL)
 354                         return -1;
 355                 os_memcpy(bss->ssid.wpa_psk->psk, ssid->psk, PMK_LEN);
 356                 bss->ssid.wpa_psk->group = 1;
 357         }
 358
 359         /* Select group cipher based on the enabled pairwise cipher suites */
 360         pairwise = 0;
 361         if (bss->wpa & 1)
 362                 pairwise |= bss->wpa_pairwise;
 363         if (bss->wpa & 2) {
 364                 if (bss->rsn_pairwise == 0)
 365                         bss->rsn_pairwise = bss->wpa_pairwise;
 366                 pairwise |= bss->rsn_pairwise;
 367         }
 368         if (pairwise & WPA_CIPHER_TKIP)
 369                 bss->wpa_group = WPA_CIPHER_TKIP;
 370         else
 371                 bss->wpa_group = WPA_CIPHER_CCMP;
 372
 373         if (bss->wpa && bss->ieee802_1x)
 374                 bss->ssid.security_policy = SECURITY_WPA;
 375         else if (bss->wpa)
 376                 bss->ssid.security_policy = SECURITY_WPA_PSK;
 377         else if (bss->ieee802_1x) {
 378                 bss->ssid.security_policy = SECURITY_IEEE_802_1X;
 379                 bss->ssid.wep.default_len = bss->default_wep_key_len;
 380         } else if (bss->ssid.wep.keys_set)
 381                 bss->ssid.security_policy = SECURITY_STATIC_WEP;
 382         else
 383                 bss->ssid.security_policy = SECURITY_PLAINTEXT;
 384
 385         return 0;
 386 }
 387
 388
 389 int wpa_supplicant_create_ap(struct wpa_supplicant *wpa_s,
 390                              struct wpa_ssid *ssid)
 391 {
 392         struct wpa_driver_associate_params params;
 393         struct hostapd_iface *hapd_iface;
 394         struct hostapd_config *conf;
 395         size_t i;
 396
 397         if (ssid->ssid == NULL || ssid->ssid_len == 0) {
 398                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 399                 return -1;
 400         }
 401
 402         wpa_supplicant_ap_deinit(wpa_s);
 403
 404         wpa_printf(MSG_DEBUG, "Setting up AP (SSID='%s')",
 405                    wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 406
 407         os_memset(&params, 0, sizeof(params));
 408         params.ssid = ssid->ssid;
 409         params.ssid_len = ssid->ssid_len;
 410         params.mode = ssid->mode;
 411         params.freq = ssid->frequency;
 412
 413         if (wpa_drv_associate(wpa_s, &params) < 0) {
 414                 wpa_msg(wpa_s, MSG_INFO, "Failed to start AP functionality");
 415                 return -1;
 416         }
 417
 418         wpa_s->ap_iface = hapd_iface = os_zalloc(sizeof(*wpa_s->ap_iface));
 419         if (hapd_iface == NULL)
 420                 return -1;
 421         hapd_iface->owner = wpa_s;
 422
 423         wpa_s->ap_iface->conf = conf = hostapd_config_defaults();
 424         if (conf == NULL) {
 425                 wpa_supplicant_ap_deinit(wpa_s);
 426                 return -1;
 427         }
 428
 429         if (wpa_supplicant_conf_ap(wpa_s, ssid, conf)) {
 430                 wpa_printf(MSG_ERROR, "Failed to create AP configuration");
 431                 wpa_supplicant_ap_deinit(wpa_s);
 432                 return -1;
 433         }
 434
 435         hapd_iface->num_bss = conf->num_bss;
 436         hapd_iface->bss = os_zalloc(conf->num_bss *
 437                                     sizeof(struct hostapd_data *));
 438         if (hapd_iface->bss == NULL) {
 439                 wpa_supplicant_ap_deinit(wpa_s);
 440                 return -1;
 441         }
 442
 443         for (i = 0; i < conf->num_bss; i++) {
 444                 hapd_iface->bss[i] =
 445                         hostapd_alloc_bss_data(hapd_iface, conf,
 446                                                &conf->bss[i]);
 447                 if (hapd_iface->bss[i] == NULL) {
 448                         wpa_supplicant_ap_deinit(wpa_s);
 449                         return -1;
 450                 }
 451         }
 452
 453         if (hostapd_setup_interface(wpa_s->ap_iface)) {
 454                 wpa_printf(MSG_ERROR, "Failed to initialize AP interface");
 455                 wpa_supplicant_ap_deinit(wpa_s);
 456                 return -1;
 457         }
 458
 459         return 0;
 460 }
 461
 462
 463 void wpa_supplicant_ap_deinit(struct wpa_supplicant *wpa_s)
 464 {
 465         if (wpa_s->ap_iface == NULL)
 466                 return;
 467
 468         hostapd_interface_deinit(wpa_s->ap_iface);
 469         wpa_s->ap_iface = NULL;
 470 }
 471
 472
 473 void ap_tx_status(void *ctx, const u8 *addr,
 474                   const u8 *buf, size_t len, int ack)
 475 {
 476         struct wpa_supplicant *wpa_s = ctx;
 477         hostapd_tx_status(wpa_s->ap_iface->bss[0], addr, buf, len, ack);
 478 }
 479
 480
 481 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr)
 482 {
 483         struct wpa_supplicant *wpa_s = ctx;
 484         ap_rx_from_unknown_sta(wpa_s->ap_iface->bss[0], addr);
 485 }
 486
 487
 488 #ifdef NEED_MLME
 489 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
 490                 struct hostapd_frame_info *fi)
 491 {
 492         struct wpa_supplicant *wpa_s = ctx;
 493         ieee802_11_mgmt(wpa_s->ap_iface->bss[0], buf, len, stype, fi);
 494 }
 495
 496
 497 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok)
 498 {
 499         struct wpa_supplicant *wpa_s = ctx;
 500         ieee802_11_mgmt_cb(wpa_s->ap_iface->bss[0], buf, len, stype, ok);
 501 }
 502 #endif /* NEED_MLME */
 503
 504
 505 void wpa_supplicant_ap_rx_eapol(struct wpa_supplicant *wpa_s,
 506                                 const u8 *src_addr, const u8 *buf, size_t len)
 507 {
 508         hostapd_eapol_receive(wpa_s->ap_iface->bss[0], src_addr, buf, len);
 509 }