git.maemo.org Git - wpasupplicant/blob - 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 *own_addr, const u8 *addr,
 137                                 int reason)
 138 {
 139         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 140         return -1;
 141 }
 142
 143
 144 static int ap_driver_sta_disassoc(void *priv, const u8 *own_addr,
 145                                   const u8 *addr, int reason)
 146 {
 147         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 148         return -1;
 149 }
 150
 151
 152 static int ap_driver_sta_remove(void *priv, const u8 *addr)
 153 {
 154         struct ap_driver_data *drv = priv;
 155         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 156         return wpa_drv_sta_remove(wpa_s, addr);
 157 }
 158
 159
 160 static int ap_driver_send_mlme(void *priv, const u8 *data, size_t len)
 161 {
 162         struct ap_driver_data *drv = priv;
 163         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 164         return wpa_drv_send_mlme(wpa_s, data, len);
 165 }
 166
 167
 168 static int ap_driver_sta_add(const char *ifname, void *priv,
 169                              struct hostapd_sta_add_params *params)
 170 {
 171         struct ap_driver_data *drv = priv;
 172         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 173         return wpa_drv_sta_add(wpa_s, params);
 174 }
 175
 176
 177 static int ap_driver_get_inact_sec(void *priv, const u8 *addr)
 178 {
 179         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 180         return -1;
 181 }
 182
 183
 184 static int ap_driver_set_freq(void *priv, struct hostapd_freq_params *freq)
 185 {
 186         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 187         return 0;
 188 }
 189
 190
 191 static int ap_driver_set_beacon(const char *iface, void *priv,
 192                                 const u8 *head, size_t head_len,
 193                                 const u8 *tail, size_t tail_len,
 194                                 int dtim_period)
 195 {
 196         struct ap_driver_data *drv = priv;
 197         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 198         return wpa_drv_set_beacon(wpa_s, head, head_len, tail, tail_len,
 199                                   dtim_period);
 200 }
 201
 202
 203 static int ap_driver_set_beacon_int(void *priv, int value)
 204 {
 205         struct ap_driver_data *drv = priv;
 206         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 207         return wpa_drv_set_beacon_int(wpa_s, value);
 208 }
 209
 210
 211 static int ap_driver_set_cts_protect(void *priv, int value)
 212 {
 213         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 214         return -1;
 215 }
 216
 217
 218 static int ap_driver_set_preamble(void *priv, int value)
 219 {
 220         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 221         return -1;
 222 }
 223
 224
 225 static int ap_driver_set_short_slot_time(void *priv, int value)
 226 {
 227         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 228         return -1;
 229 }
 230
 231
 232 static int ap_driver_set_tx_queue_params(void *priv, int queue, int aifs,
 233                                          int cw_min, int cw_max,
 234                                          int burst_time)
 235 {
 236         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 237         return -1;
 238 }
 239
 240
 241 static struct hostapd_hw_modes *ap_driver_get_hw_feature_data(void *priv,
 242                                                               u16 *num_modes,
 243                                                               u16 *flags)
 244 {
 245         struct ap_driver_data *drv = priv;
 246         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 247         return wpa_drv_get_hw_feature_data(wpa_s, num_modes, flags);
 248 }
 249
 250
 251 static int ap_driver_hapd_send_eapol(void *priv, const u8 *addr,
 252                                      const u8 *data, size_t data_len,
 253                                      int encrypt, const u8 *own_addr)
 254 {
 255         struct ap_driver_data *drv = priv;
 256         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 257         return wpa_drv_hapd_send_eapol(wpa_s, addr, data, data_len, encrypt,
 258                                        own_addr);
 259 }
 260
 261
 262 struct wpa_driver_ops ap_driver_ops =
 263 {
 264         .name = "wpa_supplicant",
 265         .hapd_init = ap_driver_init,
 266         .hapd_deinit = ap_driver_deinit,
 267         .send_ether = ap_driver_send_ether,
 268         .hapd_set_key = ap_driver_set_key,
 269         .get_seqnum = ap_driver_get_seqnum,
 270         .flush = ap_driver_flush,
 271         .read_sta_data = ap_driver_read_sta_data,
 272         .sta_set_flags = ap_driver_sta_set_flags,
 273         .sta_deauth = ap_driver_sta_deauth,
 274         .sta_disassoc = ap_driver_sta_disassoc,
 275         .sta_remove = ap_driver_sta_remove,
 276         .send_mlme = ap_driver_send_mlme,
 277         .sta_add = ap_driver_sta_add,
 278         .get_inact_sec = ap_driver_get_inact_sec,
 279         .set_freq = ap_driver_set_freq,
 280         .hapd_set_beacon = ap_driver_set_beacon,
 281         .set_beacon_int = ap_driver_set_beacon_int,
 282         .set_cts_protect = ap_driver_set_cts_protect,
 283         .set_preamble = ap_driver_set_preamble,
 284         .set_short_slot_time = ap_driver_set_short_slot_time,
 285         .set_tx_queue_params = ap_driver_set_tx_queue_params,
 286         .get_hw_feature_data = ap_driver_get_hw_feature_data,
 287         .hapd_send_eapol = ap_driver_hapd_send_eapol,
 288 };
 289
 290
 291 extern struct wpa_driver_ops *wpa_drivers[];
 292
 293 static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
 294                                   struct wpa_ssid *ssid,
 295                                   struct hostapd_config *conf)
 296 {
 297         struct hostapd_bss_config *bss = &conf->bss[0];
 298         int j, pairwise;
 299
 300         for (j = 0; wpa_drivers[j]; j++) {
 301                 if (os_strcmp("wpa_supplicant", wpa_drivers[j]->name) == 0) {
 302                         conf->driver = wpa_drivers[j];
 303                         break;
 304                 }
 305         }
 306         if (conf->driver == NULL) {
 307                 wpa_printf(MSG_ERROR, "No AP driver ops found");
 308                 return -1;
 309         }
 310
 311         os_strlcpy(bss->iface, wpa_s->ifname, sizeof(bss->iface));
 312
 313         if (ssid->frequency == 0) {
 314                 /* default channel 11 */
 315                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 316                 conf->channel = 11;
 317         } else if (ssid->frequency >= 2412 && ssid->frequency <= 2472) {
 318                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 319                 conf->channel = (ssid->frequency - 2407) / 5;
 320         } else if ((ssid->frequency >= 5180 && ssid->frequency <= 5240) ||
 321                    (ssid->frequency >= 5745 && ssid->frequency <= 5825)) {
 322                 conf->hw_mode = HOSTAPD_MODE_IEEE80211A;
 323                 conf->channel = (ssid->frequency - 5000) / 5;
 324         } else {
 325                 wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: %d MHz",
 326                            ssid->frequency);
 327                 return -1;
 328         }
 329
 330         /* TODO: enable HT if driver supports it;
 331          * drop to 11b if driver does not support 11g */
 332
 333         if (ssid->ssid_len == 0) {
 334                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 335                 return -1;
 336         }
 337         os_memcpy(bss->ssid.ssid, ssid->ssid, ssid->ssid_len);
 338         bss->ssid.ssid[ssid->ssid_len] = '\0';
 339         bss->ssid.ssid_len = ssid->ssid_len;
 340         bss->ssid.ssid_set = 1;
 341
 342         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt))
 343                 bss->wpa = ssid->proto;
 344         bss->wpa_key_mgmt = ssid->key_mgmt;
 345         bss->wpa_pairwise = ssid->pairwise_cipher;
 346         if (ssid->passphrase) {
 347                 bss->ssid.wpa_passphrase = os_strdup(ssid->passphrase);
 348         } else if (ssid->psk_set) {
 349                 os_free(bss->ssid.wpa_psk);
 350                 bss->ssid.wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 351                 if (bss->ssid.wpa_psk == NULL)
 352                         return -1;
 353                 os_memcpy(bss->ssid.wpa_psk->psk, ssid->psk, PMK_LEN);
 354                 bss->ssid.wpa_psk->group = 1;
 355         }
 356
 357         /* Select group cipher based on the enabled pairwise cipher suites */
 358         pairwise = 0;
 359         if (bss->wpa & 1)
 360                 pairwise |= bss->wpa_pairwise;
 361         if (bss->wpa & 2) {
 362                 if (bss->rsn_pairwise == 0)
 363                         bss->rsn_pairwise = bss->wpa_pairwise;
 364                 pairwise |= bss->rsn_pairwise;
 365         }
 366         if (pairwise & WPA_CIPHER_TKIP)
 367                 bss->wpa_group = WPA_CIPHER_TKIP;
 368         else
 369                 bss->wpa_group = WPA_CIPHER_CCMP;
 370
 371         if (bss->wpa && bss->ieee802_1x)
 372                 bss->ssid.security_policy = SECURITY_WPA;
 373         else if (bss->wpa)
 374                 bss->ssid.security_policy = SECURITY_WPA_PSK;
 375         else if (bss->ieee802_1x) {
 376                 bss->ssid.security_policy = SECURITY_IEEE_802_1X;
 377                 bss->ssid.wep.default_len = bss->default_wep_key_len;
 378         } else if (bss->ssid.wep.keys_set)
 379                 bss->ssid.security_policy = SECURITY_STATIC_WEP;
 380         else
 381                 bss->ssid.security_policy = SECURITY_PLAINTEXT;
 382
 383         return 0;
 384 }
 385
 386
 387 int wpa_supplicant_create_ap(struct wpa_supplicant *wpa_s,
 388                              struct wpa_ssid *ssid)
 389 {
 390         struct wpa_driver_associate_params params;
 391         struct hostapd_iface *hapd_iface;
 392         struct hostapd_config *conf;
 393         size_t i;
 394
 395         if (ssid->ssid == NULL || ssid->ssid_len == 0) {
 396                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 397                 return -1;
 398         }
 399
 400         wpa_supplicant_ap_deinit(wpa_s);
 401
 402         wpa_printf(MSG_DEBUG, "Setting up AP (SSID='%s')",
 403                    wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 404
 405         os_memset(&params, 0, sizeof(params));
 406         params.ssid = ssid->ssid;
 407         params.ssid_len = ssid->ssid_len;
 408         params.mode = ssid->mode;
 409         params.freq = ssid->frequency;
 410
 411         if (wpa_drv_associate(wpa_s, &params) < 0) {
 412                 wpa_msg(wpa_s, MSG_INFO, "Failed to start AP functionality");
 413                 return -1;
 414         }
 415
 416         wpa_s->ap_iface = hapd_iface = os_zalloc(sizeof(*wpa_s->ap_iface));
 417         if (hapd_iface == NULL)
 418                 return -1;
 419         hapd_iface->owner = wpa_s;
 420
 421         wpa_s->ap_iface->conf = conf = hostapd_config_defaults();
 422         if (conf == NULL) {
 423                 wpa_supplicant_ap_deinit(wpa_s);
 424                 return -1;
 425         }
 426
 427         if (wpa_supplicant_conf_ap(wpa_s, ssid, conf)) {
 428                 wpa_printf(MSG_ERROR, "Failed to create AP configuration");
 429                 wpa_supplicant_ap_deinit(wpa_s);
 430                 return -1;
 431         }
 432
 433         hapd_iface->num_bss = conf->num_bss;
 434         hapd_iface->bss = os_zalloc(conf->num_bss *
 435                                     sizeof(struct hostapd_data *));
 436         if (hapd_iface->bss == NULL) {
 437                 wpa_supplicant_ap_deinit(wpa_s);
 438                 return -1;
 439         }
 440
 441         for (i = 0; i < conf->num_bss; i++) {
 442                 hapd_iface->bss[i] =
 443                         hostapd_alloc_bss_data(hapd_iface, conf,
 444                                                &conf->bss[i]);
 445                 if (hapd_iface->bss[i] == NULL) {
 446                         wpa_supplicant_ap_deinit(wpa_s);
 447                         return -1;
 448                 }
 449         }
 450
 451         if (hostapd_setup_interface(wpa_s->ap_iface)) {
 452                 wpa_printf(MSG_ERROR, "Failed to initialize AP interface");
 453                 wpa_supplicant_ap_deinit(wpa_s);
 454                 return -1;
 455         }
 456
 457         return 0;
 458 }
 459
 460
 461 void wpa_supplicant_ap_deinit(struct wpa_supplicant *wpa_s)
 462 {
 463         if (wpa_s->ap_iface == NULL)
 464                 return;
 465
 466         hostapd_interface_deinit(wpa_s->ap_iface);
 467         wpa_s->ap_iface = NULL;
 468 }
 469
 470
 471 void ap_tx_status(void *ctx, const u8 *addr,
 472                   const u8 *buf, size_t len, int ack)
 473 {
 474         struct wpa_supplicant *wpa_s = ctx;
 475         hostapd_tx_status(wpa_s->ap_iface->bss[0], addr, buf, len, ack);
 476 }
 477
 478
 479 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr)
 480 {
 481         struct wpa_supplicant *wpa_s = ctx;
 482         ap_rx_from_unknown_sta(wpa_s->ap_iface->bss[0], addr);
 483 }
 484
 485
 486 #ifdef NEED_MLME
 487 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
 488                 struct hostapd_frame_info *fi)
 489 {
 490         struct wpa_supplicant *wpa_s = ctx;
 491         ieee802_11_mgmt(wpa_s->ap_iface->bss[0], buf, len, stype, fi);
 492 }
 493
 494
 495 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok)
 496 {
 497         struct wpa_supplicant *wpa_s = ctx;
 498         ieee802_11_mgmt_cb(wpa_s->ap_iface->bss[0], buf, len, stype, ok);
 499 }
 500 #endif /* NEED_MLME */
 501
 502
 503 void wpa_supplicant_ap_rx_eapol(struct wpa_supplicant *wpa_s,
 504                                 const u8 *src_addr, const u8 *buf, size_t len)
 505 {
 506         hostapd_eapol_receive(wpa_s->ap_iface->bss[0], src_addr, buf, len);
 507 }