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         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 132         return -1;
 133 }
 134
 135
 136 static int ap_driver_sta_deauth(void *priv, const u8 *addr, int reason)
 137 {
 138         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 139         return -1;
 140 }
 141
 142
 143 static int ap_driver_sta_disassoc(void *priv, const u8 *addr, int reason)
 144 {
 145         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 146         return -1;
 147 }
 148
 149
 150 static int ap_driver_sta_remove(void *priv, const u8 *addr)
 151 {
 152         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 153         return -1;
 154 }
 155
 156
 157 static int ap_driver_send_mgmt_frame(void *priv, const void *data, size_t len,
 158                                      int flags)
 159 {
 160         struct ap_driver_data *drv = priv;
 161         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 162         return wpa_drv_send_mlme(wpa_s, data, len);
 163 }
 164
 165
 166 static int ap_driver_sta_add(const char *ifname, void *priv,
 167                              struct hostapd_sta_add_params *params)
 168 {
 169         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 170         return -1;
 171 }
 172
 173
 174 static int ap_driver_get_inact_sec(void *priv, const u8 *addr)
 175 {
 176         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 177         return -1;
 178 }
 179
 180
 181 static int ap_driver_set_freq(void *priv, struct hostapd_freq_params *freq)
 182 {
 183         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 184         return 0;
 185 }
 186
 187
 188 static int ap_driver_set_beacon(const char *iface, void *priv,
 189                                 const u8 *head, size_t head_len,
 190                                 const u8 *tail, size_t tail_len,
 191                                 int dtim_period)
 192 {
 193         struct ap_driver_data *drv = priv;
 194         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 195         return wpa_drv_set_beacon(wpa_s, head, head_len, tail, tail_len,
 196                                   dtim_period);
 197 }
 198
 199
 200 static int ap_driver_set_beacon_int(void *priv, int value)
 201 {
 202         struct ap_driver_data *drv = priv;
 203         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 204         return wpa_drv_set_beacon_int(wpa_s, value);
 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 struct wpa_driver_ops ap_driver_ops =
 249 {
 250         .name = "wpa_supplicant",
 251         .hapd_init = ap_driver_init,
 252         .hapd_deinit = ap_driver_deinit,
 253         .send_ether = ap_driver_send_ether,
 254         .hapd_set_key = ap_driver_set_key,
 255         .get_seqnum = ap_driver_get_seqnum,
 256         .flush = ap_driver_flush,
 257         .read_sta_data = ap_driver_read_sta_data,
 258         .sta_set_flags = ap_driver_sta_set_flags,
 259         .sta_deauth = ap_driver_sta_deauth,
 260         .sta_disassoc = ap_driver_sta_disassoc,
 261         .sta_remove = ap_driver_sta_remove,
 262         .send_mgmt_frame = ap_driver_send_mgmt_frame,
 263         .sta_add = ap_driver_sta_add,
 264         .get_inact_sec = ap_driver_get_inact_sec,
 265         .set_freq = ap_driver_set_freq,
 266         .hapd_set_beacon = ap_driver_set_beacon,
 267         .hapd_set_beacon_int = ap_driver_set_beacon_int,
 268         .set_cts_protect = ap_driver_set_cts_protect,
 269         .set_preamble = ap_driver_set_preamble,
 270         .set_short_slot_time = ap_driver_set_short_slot_time,
 271         .set_tx_queue_params = ap_driver_set_tx_queue_params,
 272         .get_hw_feature_data = ap_driver_get_hw_feature_data,
 273 };
 274
 275
 276 extern struct wpa_driver_ops *wpa_drivers[];
 277
 278 static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
 279                                   struct wpa_ssid *ssid,
 280                                   struct hostapd_config *conf)
 281 {
 282         struct hostapd_bss_config *bss = &conf->bss[0];
 283         int j;
 284
 285         for (j = 0; wpa_drivers[j]; j++) {
 286                 if (os_strcmp("wpa_supplicant", wpa_drivers[j]->name) == 0) {
 287                         conf->driver = wpa_drivers[j];
 288                         break;
 289                 }
 290         }
 291         if (conf->driver == NULL) {
 292                 wpa_printf(MSG_ERROR, "No AP driver ops found");
 293                 return -1;
 294         }
 295
 296         os_strlcpy(bss->iface, wpa_s->ifname, sizeof(bss->iface));
 297
 298         if (ssid->frequency == 0) {
 299                 /* default channel 11 */
 300                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 301                 conf->channel = 11;
 302         } else if (ssid->frequency >= 2412 && ssid->frequency <= 2472) {
 303                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 304                 conf->channel = (ssid->frequency - 2407) / 5;
 305         } else if ((ssid->frequency >= 5180 && ssid->frequency <= 5240) ||
 306                    (ssid->frequency >= 5745 && ssid->frequency <= 5825)) {
 307                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 308                 conf->channel = (ssid->frequency - 5000) / 5;
 309         } else {
 310                 wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: %d MHz",
 311                            ssid->frequency);
 312                 return -1;
 313         }
 314
 315         /* TODO: enable HT if driver supports it;
 316          * drop to 11b if driver does not support 11g */
 317
 318         if (ssid->ssid_len == 0) {
 319                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 320                 return -1;
 321         }
 322         os_memcpy(bss->ssid.ssid, ssid->ssid, ssid->ssid_len);
 323         bss->ssid.ssid[ssid->ssid_len] = '\0';
 324         bss->ssid.ssid_len = ssid->ssid_len;
 325         bss->ssid.ssid_set = 1;
 326
 327         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt))
 328                 bss->wpa = ssid->proto;
 329         bss->wpa_key_mgmt = ssid->key_mgmt;
 330         bss->wpa_pairwise = ssid->pairwise_cipher;
 331         if (ssid->passphrase) {
 332                 bss->ssid.wpa_passphrase = os_strdup(ssid->passphrase);
 333                 if (hostapd_setup_wpa_psk(bss))
 334                         return -1;
 335         } else if (ssid->psk_set) {
 336                 os_free(bss->ssid.wpa_psk);
 337                 bss->ssid.wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 338                 if (bss->ssid.wpa_psk == NULL)
 339                         return -1;
 340                 os_memcpy(bss->ssid.wpa_psk->psk, ssid->psk, PMK_LEN);
 341                 bss->ssid.wpa_psk->group = 1;
 342         }
 343
 344         return 0;
 345 }
 346
 347
 348 int wpa_supplicant_create_ap(struct wpa_supplicant *wpa_s,
 349                              struct wpa_ssid *ssid)
 350 {
 351         struct wpa_driver_associate_params params;
 352         struct hostapd_iface *hapd_iface;
 353         struct hostapd_config *conf;
 354         size_t i;
 355
 356         if (ssid->ssid == NULL || ssid->ssid_len == 0) {
 357                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 358                 return -1;
 359         }
 360
 361         wpa_supplicant_ap_deinit(wpa_s);
 362
 363         wpa_printf(MSG_DEBUG, "Setting up AP (SSID='%s')",
 364                    wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 365
 366         os_memset(&params, 0, sizeof(params));
 367         params.ssid = ssid->ssid;
 368         params.ssid_len = ssid->ssid_len;
 369         params.mode = ssid->mode;
 370         params.freq = ssid->frequency;
 371
 372         if (wpa_drv_associate(wpa_s, &params) < 0) {
 373                 wpa_msg(wpa_s, MSG_INFO, "Failed to start AP functionality");
 374                 return -1;
 375         }
 376
 377         wpa_s->ap_iface = hapd_iface = os_zalloc(sizeof(*wpa_s->ap_iface));
 378         if (hapd_iface == NULL)
 379                 return -1;
 380         hapd_iface->owner = wpa_s;
 381
 382         wpa_s->ap_iface->conf = conf = hostapd_config_defaults();
 383         if (conf == NULL) {
 384                 wpa_supplicant_ap_deinit(wpa_s);
 385                 return -1;
 386         }
 387
 388         if (wpa_supplicant_conf_ap(wpa_s, ssid, conf)) {
 389                 wpa_printf(MSG_ERROR, "Failed to create AP configuration");
 390                 wpa_supplicant_ap_deinit(wpa_s);
 391                 return -1;
 392         }
 393
 394         hapd_iface->num_bss = conf->num_bss;
 395         hapd_iface->bss = os_zalloc(conf->num_bss *
 396                                     sizeof(struct hostapd_data *));
 397         if (hapd_iface->bss == NULL) {
 398                 wpa_supplicant_ap_deinit(wpa_s);
 399                 return -1;
 400         }
 401
 402         for (i = 0; i < conf->num_bss; i++) {
 403                 hapd_iface->bss[i] =
 404                         hostapd_alloc_bss_data(hapd_iface, conf,
 405                                                &conf->bss[i]);
 406                 if (hapd_iface->bss[i] == NULL) {
 407                         wpa_supplicant_ap_deinit(wpa_s);
 408                         return -1;
 409                 }
 410         }
 411
 412         if (hostapd_setup_interface(wpa_s->ap_iface)) {
 413                 wpa_printf(MSG_ERROR, "Failed to initialize AP interface");
 414                 wpa_supplicant_ap_deinit(wpa_s);
 415                 return -1;
 416         }
 417
 418         return 0;
 419 }
 420
 421
 422 void wpa_supplicant_ap_deinit(struct wpa_supplicant *wpa_s)
 423 {
 424         if (wpa_s->ap_iface == NULL)
 425                 return;
 426
 427         hostapd_interface_deinit(wpa_s->ap_iface);
 428         wpa_s->ap_iface = NULL;
 429 }
 430
 431
 432 void ap_tx_status(void *ctx, const u8 *addr,
 433                   const u8 *buf, size_t len, int ack)
 434 {
 435         struct wpa_supplicant *wpa_s = ctx;
 436         hostapd_tx_status(wpa_s->ap_iface->bss[0], addr, buf, len, ack);
 437 }
 438
 439
 440 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr)
 441 {
 442         struct wpa_supplicant *wpa_s = ctx;
 443         ap_rx_from_unknown_sta(wpa_s->ap_iface->bss[0], addr);
 444 }
 445
 446
 447 #ifdef NEED_MLME
 448 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
 449                 struct hostapd_frame_info *fi)
 450 {
 451         struct wpa_supplicant *wpa_s = ctx;
 452         ieee802_11_mgmt(wpa_s->ap_iface->bss[0], buf, len, stype, fi);
 453 }
 454
 455
 456 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok)
 457 {
 458         struct wpa_supplicant *wpa_s = ctx;
 459         ieee802_11_mgmt_cb(wpa_s->ap_iface->bss[0], buf, len, stype, ok);
 460 }
 461 #endif /* NEED_MLME */