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