vcs.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 "../hostapd/wps_hostapd.h"
  25 #include "eap_common/eap_defs.h"
  26 #include "eap_server/eap_methods.h"
  27 #include "eap_common/eap_wsc_common.h"
  28 #include "wps/wps.h"
  29 #include "config_ssid.h"
  30 #include "wpa_supplicant_i.h"
  31 #include "driver_i.h"
  32 #include "ap.h"
  33
  34
  35 int hostapd_for_each_interface(int (*cb)(struct hostapd_iface *iface,
  36                                          void *ctx), void *ctx)
  37 {
  38         /* TODO */
  39         return 0;
  40 }
  41
  42
  43 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
  44 {
  45         return 0;
  46 }
  47
  48
  49 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
  50 {
  51 }
  52
  53
  54 struct ap_driver_data {
  55         struct hostapd_data *hapd;
  56 };
  57
  58
  59 static void * ap_driver_init(struct hostapd_data *hapd,
  60                              struct wpa_init_params *params)
  61 {
  62         struct ap_driver_data *drv;
  63         struct wpa_supplicant *wpa_s = hapd->iface->owner;
  64
  65         drv = os_zalloc(sizeof(struct ap_driver_data));
  66         if (drv == NULL) {
  67                 wpa_printf(MSG_ERROR, "Could not allocate memory for AP "
  68                            "driver data");
  69                 return NULL;
  70         }
  71         drv->hapd = hapd;
  72         os_memcpy(hapd->own_addr, wpa_s->own_addr, ETH_ALEN);
  73
  74         return drv;
  75 }
  76
  77
  78 static void ap_driver_deinit(void *priv)
  79 {
  80         struct ap_driver_data *drv = priv;
  81
  82         os_free(drv);
  83 }
  84
  85
  86 static int ap_driver_send_ether(void *priv, const u8 *dst, const u8 *src,
  87                                 u16 proto, const u8 *data, size_t data_len)
  88 {
  89         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
  90         return -1;
  91 }
  92
  93
  94 static int ap_driver_set_key(const char *iface, void *priv, wpa_alg alg,
  95                              const u8 *addr, int key_idx, int set_tx,
  96                              const u8 *seq, size_t seq_len, const u8 *key,
  97                              size_t key_len)
  98 {
  99         struct ap_driver_data *drv = priv;
 100         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 101         return wpa_drv_set_key(wpa_s, alg, addr, key_idx, set_tx, seq, seq_len,
 102                                key, key_len);
 103 }
 104
 105
 106 static int ap_driver_get_seqnum(const char *iface, void *priv, const u8 *addr,
 107                                 int idx, u8 *seq)
 108 {
 109         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 110         return -1;
 111 }
 112
 113
 114 static int ap_driver_flush(void *priv)
 115 {
 116         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 117         return -1;
 118 }
 119
 120
 121 static int ap_driver_read_sta_data(void *priv,
 122                                    struct hostap_sta_driver_data *data,
 123                                    const u8 *addr)
 124 {
 125         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 126         return -1;
 127 }
 128
 129
 130 static int ap_driver_sta_set_flags(void *priv, const u8 *addr, int total_flags,
 131                                    int flags_or, int flags_and)
 132 {
 133         struct ap_driver_data *drv = priv;
 134         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 135         return wpa_drv_sta_set_flags(wpa_s, addr, total_flags, flags_or,
 136                                      flags_and);
 137 }
 138
 139
 140 static int ap_driver_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
 141                                 int reason)
 142 {
 143         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 144         return -1;
 145 }
 146
 147
 148 static int ap_driver_sta_disassoc(void *priv, const u8 *own_addr,
 149                                   const u8 *addr, int reason)
 150 {
 151         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 152         return -1;
 153 }
 154
 155
 156 static int ap_driver_sta_remove(void *priv, const u8 *addr)
 157 {
 158         struct ap_driver_data *drv = priv;
 159         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 160         return wpa_drv_sta_remove(wpa_s, addr);
 161 }
 162
 163
 164 static int ap_driver_send_mlme(void *priv, const u8 *data, size_t len)
 165 {
 166         struct ap_driver_data *drv = priv;
 167         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 168         return wpa_drv_send_mlme(wpa_s, data, len);
 169 }
 170
 171
 172 static int ap_driver_sta_add(const char *ifname, void *priv,
 173                              struct hostapd_sta_add_params *params)
 174 {
 175         struct ap_driver_data *drv = priv;
 176         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 177         return wpa_drv_sta_add(wpa_s, params);
 178 }
 179
 180
 181 static int ap_driver_get_inact_sec(void *priv, const u8 *addr)
 182 {
 183         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 184         return -1;
 185 }
 186
 187
 188 static int ap_driver_set_freq(void *priv, struct hostapd_freq_params *freq)
 189 {
 190         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 191         return 0;
 192 }
 193
 194
 195 static int ap_driver_set_beacon(const char *iface, void *priv,
 196                                 const u8 *head, size_t head_len,
 197                                 const u8 *tail, size_t tail_len,
 198                                 int dtim_period)
 199 {
 200         struct ap_driver_data *drv = priv;
 201         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 202         return wpa_drv_set_beacon(wpa_s, head, head_len, tail, tail_len,
 203                                   dtim_period);
 204 }
 205
 206
 207 static int ap_driver_set_beacon_int(void *priv, int value)
 208 {
 209         struct ap_driver_data *drv = priv;
 210         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 211         return wpa_drv_set_beacon_int(wpa_s, value);
 212 }
 213
 214
 215 static int ap_driver_set_cts_protect(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_preamble(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_short_slot_time(void *priv, int value)
 230 {
 231         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 232         return -1;
 233 }
 234
 235
 236 static int ap_driver_set_tx_queue_params(void *priv, int queue, int aifs,
 237                                          int cw_min, int cw_max,
 238                                          int burst_time)
 239 {
 240         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 241         return -1;
 242 }
 243
 244
 245 static struct hostapd_hw_modes *ap_driver_get_hw_feature_data(void *priv,
 246                                                               u16 *num_modes,
 247                                                               u16 *flags)
 248 {
 249         struct ap_driver_data *drv = priv;
 250         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 251         return wpa_drv_get_hw_feature_data(wpa_s, num_modes, flags);
 252 }
 253
 254
 255 static int ap_driver_hapd_send_eapol(void *priv, const u8 *addr,
 256                                      const u8 *data, size_t data_len,
 257                                      int encrypt, const u8 *own_addr)
 258 {
 259         struct ap_driver_data *drv = priv;
 260         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
 261         return wpa_drv_hapd_send_eapol(wpa_s, addr, data, data_len, encrypt,
 262                                        own_addr);
 263 }
 264
 265
 266 struct wpa_driver_ops ap_driver_ops =
 267 {
 268         .name = "wpa_supplicant",
 269         .hapd_init = ap_driver_init,
 270         .hapd_deinit = ap_driver_deinit,
 271         .send_ether = ap_driver_send_ether,
 272         .hapd_set_key = ap_driver_set_key,
 273         .get_seqnum = ap_driver_get_seqnum,
 274         .flush = ap_driver_flush,
 275         .read_sta_data = ap_driver_read_sta_data,
 276         .sta_set_flags = ap_driver_sta_set_flags,
 277         .sta_deauth = ap_driver_sta_deauth,
 278         .sta_disassoc = ap_driver_sta_disassoc,
 279         .sta_remove = ap_driver_sta_remove,
 280         .send_mlme = ap_driver_send_mlme,
 281         .sta_add = ap_driver_sta_add,
 282         .get_inact_sec = ap_driver_get_inact_sec,
 283         .set_freq = ap_driver_set_freq,
 284         .hapd_set_beacon = ap_driver_set_beacon,
 285         .set_beacon_int = ap_driver_set_beacon_int,
 286         .set_cts_protect = ap_driver_set_cts_protect,
 287         .set_preamble = ap_driver_set_preamble,
 288         .set_short_slot_time = ap_driver_set_short_slot_time,
 289         .set_tx_queue_params = ap_driver_set_tx_queue_params,
 290         .get_hw_feature_data = ap_driver_get_hw_feature_data,
 291         .hapd_send_eapol = ap_driver_hapd_send_eapol,
 292 };
 293
 294
 295 extern struct wpa_driver_ops *wpa_drivers[];
 296
 297 static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
 298                                   struct wpa_ssid *ssid,
 299                                   struct hostapd_config *conf)
 300 {
 301         struct hostapd_bss_config *bss = &conf->bss[0];
 302         int j, pairwise;
 303
 304         for (j = 0; wpa_drivers[j]; j++) {
 305                 if (os_strcmp("wpa_supplicant", wpa_drivers[j]->name) == 0) {
 306                         conf->driver = wpa_drivers[j];
 307                         break;
 308                 }
 309         }
 310         if (conf->driver == NULL) {
 311                 wpa_printf(MSG_ERROR, "No AP driver ops found");
 312                 return -1;
 313         }
 314
 315         os_strlcpy(bss->iface, wpa_s->ifname, sizeof(bss->iface));
 316
 317         if (ssid->frequency == 0) {
 318                 /* default channel 11 */
 319                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 320                 conf->channel = 11;
 321         } else if (ssid->frequency >= 2412 && ssid->frequency <= 2472) {
 322                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 323                 conf->channel = (ssid->frequency - 2407) / 5;
 324         } else if ((ssid->frequency >= 5180 && ssid->frequency <= 5240) ||
 325                    (ssid->frequency >= 5745 && ssid->frequency <= 5825)) {
 326                 conf->hw_mode = HOSTAPD_MODE_IEEE80211A;
 327                 conf->channel = (ssid->frequency - 5000) / 5;
 328         } else {
 329                 wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: %d MHz",
 330                            ssid->frequency);
 331                 return -1;
 332         }
 333
 334         /* TODO: enable HT if driver supports it;
 335          * drop to 11b if driver does not support 11g */
 336
 337         if (ssid->ssid_len == 0) {
 338                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 339                 return -1;
 340         }
 341         os_memcpy(bss->ssid.ssid, ssid->ssid, ssid->ssid_len);
 342         bss->ssid.ssid[ssid->ssid_len] = '\0';
 343         bss->ssid.ssid_len = ssid->ssid_len;
 344         bss->ssid.ssid_set = 1;
 345
 346         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt))
 347                 bss->wpa = ssid->proto;
 348         bss->wpa_key_mgmt = ssid->key_mgmt;
 349         bss->wpa_pairwise = ssid->pairwise_cipher;
 350         if (ssid->passphrase) {
 351                 bss->ssid.wpa_passphrase = os_strdup(ssid->passphrase);
 352         } else if (ssid->psk_set) {
 353                 os_free(bss->ssid.wpa_psk);
 354                 bss->ssid.wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 355                 if (bss->ssid.wpa_psk == NULL)
 356                         return -1;
 357                 os_memcpy(bss->ssid.wpa_psk->psk, ssid->psk, PMK_LEN);
 358                 bss->ssid.wpa_psk->group = 1;
 359         }
 360
 361         /* Select group cipher based on the enabled pairwise cipher suites */
 362         pairwise = 0;
 363         if (bss->wpa & 1)
 364                 pairwise |= bss->wpa_pairwise;
 365         if (bss->wpa & 2) {
 366                 if (bss->rsn_pairwise == 0)
 367                         bss->rsn_pairwise = bss->wpa_pairwise;
 368                 pairwise |= bss->rsn_pairwise;
 369         }
 370         if (pairwise & WPA_CIPHER_TKIP)
 371                 bss->wpa_group = WPA_CIPHER_TKIP;
 372         else
 373                 bss->wpa_group = WPA_CIPHER_CCMP;
 374
 375         if (bss->wpa && bss->ieee802_1x)
 376                 bss->ssid.security_policy = SECURITY_WPA;
 377         else if (bss->wpa)
 378                 bss->ssid.security_policy = SECURITY_WPA_PSK;
 379         else if (bss->ieee802_1x) {
 380                 bss->ssid.security_policy = SECURITY_IEEE_802_1X;
 381                 bss->ssid.wep.default_len = bss->default_wep_key_len;
 382         } else if (bss->ssid.wep.keys_set)
 383                 bss->ssid.security_policy = SECURITY_STATIC_WEP;
 384         else
 385                 bss->ssid.security_policy = SECURITY_PLAINTEXT;
 386
 387 #ifdef CONFIG_WPS
 388         /*
 389          * Enable WPS by default, but require user interaction to actually use
 390          * it. Only the internal Registrar is supported.
 391          */
 392         bss->eap_server = 1;
 393         bss->wps_state = 2;
 394         bss->ap_setup_locked = 1;
 395         bss->config_methods = os_strdup("display push_button");
 396 #endif /* CONFIG_WPS */
 397
 398         return 0;
 399 }
 400
 401
 402 int wpa_supplicant_create_ap(struct wpa_supplicant *wpa_s,
 403                              struct wpa_ssid *ssid)
 404 {
 405         struct wpa_driver_associate_params params;
 406         struct hostapd_iface *hapd_iface;
 407         struct hostapd_config *conf;
 408         size_t i;
 409
 410         if (ssid->ssid == NULL || ssid->ssid_len == 0) {
 411                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 412                 return -1;
 413         }
 414
 415         wpa_supplicant_ap_deinit(wpa_s);
 416
 417         wpa_printf(MSG_DEBUG, "Setting up AP (SSID='%s')",
 418                    wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 419
 420         os_memset(&params, 0, sizeof(params));
 421         params.ssid = ssid->ssid;
 422         params.ssid_len = ssid->ssid_len;
 423         params.mode = ssid->mode;
 424         params.freq = ssid->frequency;
 425
 426         if (wpa_drv_associate(wpa_s, &params) < 0) {
 427                 wpa_msg(wpa_s, MSG_INFO, "Failed to start AP functionality");
 428                 return -1;
 429         }
 430
 431         wpa_s->ap_iface = hapd_iface = os_zalloc(sizeof(*wpa_s->ap_iface));
 432         if (hapd_iface == NULL)
 433                 return -1;
 434         hapd_iface->owner = wpa_s;
 435
 436         wpa_s->ap_iface->conf = conf = hostapd_config_defaults();
 437         if (conf == NULL) {
 438                 wpa_supplicant_ap_deinit(wpa_s);
 439                 return -1;
 440         }
 441
 442         if (wpa_supplicant_conf_ap(wpa_s, ssid, conf)) {
 443                 wpa_printf(MSG_ERROR, "Failed to create AP configuration");
 444                 wpa_supplicant_ap_deinit(wpa_s);
 445                 return -1;
 446         }
 447
 448         hapd_iface->num_bss = conf->num_bss;
 449         hapd_iface->bss = os_zalloc(conf->num_bss *
 450                                     sizeof(struct hostapd_data *));
 451         if (hapd_iface->bss == NULL) {
 452                 wpa_supplicant_ap_deinit(wpa_s);
 453                 return -1;
 454         }
 455
 456         for (i = 0; i < conf->num_bss; i++) {
 457                 hapd_iface->bss[i] =
 458                         hostapd_alloc_bss_data(hapd_iface, conf,
 459                                                &conf->bss[i]);
 460                 if (hapd_iface->bss[i] == NULL) {
 461                         wpa_supplicant_ap_deinit(wpa_s);
 462                         return -1;
 463                 }
 464         }
 465
 466         if (hostapd_setup_interface(wpa_s->ap_iface)) {
 467                 wpa_printf(MSG_ERROR, "Failed to initialize AP interface");
 468                 wpa_supplicant_ap_deinit(wpa_s);
 469                 return -1;
 470         }
 471
 472         return 0;
 473 }
 474
 475
 476 void wpa_supplicant_ap_deinit(struct wpa_supplicant *wpa_s)
 477 {
 478         if (wpa_s->ap_iface == NULL)
 479                 return;
 480
 481         hostapd_interface_deinit(wpa_s->ap_iface);
 482         wpa_s->ap_iface = NULL;
 483 }
 484
 485
 486 void ap_tx_status(void *ctx, const u8 *addr,
 487                   const u8 *buf, size_t len, int ack)
 488 {
 489         struct wpa_supplicant *wpa_s = ctx;
 490         hostapd_tx_status(wpa_s->ap_iface->bss[0], addr, buf, len, ack);
 491 }
 492
 493
 494 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr)
 495 {
 496         struct wpa_supplicant *wpa_s = ctx;
 497         ap_rx_from_unknown_sta(wpa_s->ap_iface->bss[0], addr);
 498 }
 499
 500
 501 #ifdef NEED_MLME
 502 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
 503                 struct hostapd_frame_info *fi)
 504 {
 505         struct wpa_supplicant *wpa_s = ctx;
 506         ieee802_11_mgmt(wpa_s->ap_iface->bss[0], buf, len, stype, fi);
 507 }
 508
 509
 510 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok)
 511 {
 512         struct wpa_supplicant *wpa_s = ctx;
 513         ieee802_11_mgmt_cb(wpa_s->ap_iface->bss[0], buf, len, stype, ok);
 514 }
 515 #endif /* NEED_MLME */
 516
 517
 518 void wpa_supplicant_ap_rx_eapol(struct wpa_supplicant *wpa_s,
 519                                 const u8 *src_addr, const u8 *buf, size_t len)
 520 {
 521         hostapd_eapol_receive(wpa_s->ap_iface->bss[0], src_addr, buf, len);
 522 }
 523
 524
 525 #ifdef CONFIG_WPS
 526
 527 int wpa_supplicant_ap_wps_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 528 {
 529         return hostapd_wps_button_pushed(wpa_s->ap_iface->bss[0]);
 530 }
 531
 532
 533 int wpa_supplicant_ap_wps_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 534                               const char *pin, char *buf, size_t buflen)
 535 {
 536         int ret, ret_len = 0;
 537
 538         if (pin == NULL) {
 539                 unsigned int rpin = wps_generate_pin();
 540                 ret_len = os_snprintf(buf, buflen, "%d", rpin);
 541                 pin = buf;
 542         }
 543
 544         ret = hostapd_wps_add_pin(wpa_s->ap_iface->bss[0], "any", pin, 0);
 545         if (ret)
 546                 return -1;
 547         return ret_len;
 548 }
 549
 550 #endif /* CONFIG_WPS */