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 "utils/includes.h"
  17
  18 #include "utils/common.h"
  19 #include "common/ieee802_11_defs.h"
  20 #include "ap/hostapd.h"
  21 #include "ap/ap_config.h"
  22 #ifdef NEED_AP_MLME
  23 #include "ap/ieee802_11.h"
  24 #endif /* NEED_AP_MLME */
  25 #include "ap/beacon.h"
  26 #include "ap/ieee802_1x.h"
  27 #include "ap/wps_hostapd.h"
  28 #include "ap/ctrl_iface_ap.h"
  29 #include "eap_common/eap_defs.h"
  30 #include "eap_server/eap_methods.h"
  31 #include "eap_common/eap_wsc_common.h"
  32 #include "wps/wps.h"
  33 #include "config_ssid.h"
  34 #include "config.h"
  35 #include "wpa_supplicant_i.h"
  36 #include "driver_i.h"
  37 #include "ap.h"
  38
  39
  40 static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
  41                                   struct wpa_ssid *ssid,
  42                                   struct hostapd_config *conf)
  43 {
  44         struct hostapd_bss_config *bss = &conf->bss[0];
  45         int pairwise;
  46
  47         conf->driver = wpa_s->driver;
  48
  49         os_strlcpy(bss->iface, wpa_s->ifname, sizeof(bss->iface));
  50
  51         if (ssid->frequency == 0) {
  52                 /* default channel 11 */
  53                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
  54                 conf->channel = 11;
  55         } else if (ssid->frequency >= 2412 && ssid->frequency <= 2472) {
  56                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
  57                 conf->channel = (ssid->frequency - 2407) / 5;
  58         } else if ((ssid->frequency >= 5180 && ssid->frequency <= 5240) ||
  59                    (ssid->frequency >= 5745 && ssid->frequency <= 5825)) {
  60                 conf->hw_mode = HOSTAPD_MODE_IEEE80211A;
  61                 conf->channel = (ssid->frequency - 5000) / 5;
  62         } else {
  63                 wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: %d MHz",
  64                            ssid->frequency);
  65                 return -1;
  66         }
  67
  68         /* TODO: enable HT if driver supports it;
  69          * drop to 11b if driver does not support 11g */
  70
  71 #ifdef CONFIG_P2P
  72         if (conf->hw_mode == HOSTAPD_MODE_IEEE80211G) {
  73                 /* Remove 802.11b rates from supported and basic rate sets */
  74                 int *list = os_malloc(4 * sizeof(int));
  75                 if (list) {
  76                         list[0] = 60;
  77                         list[1] = 120;
  78                         list[2] = 240;
  79                         list[3] = -1;
  80                 }
  81                 conf->basic_rates = list;
  82
  83                 list = os_malloc(9 * sizeof(int));
  84                 if (list) {
  85                         list[0] = 60;
  86                         list[1] = 90;
  87                         list[2] = 120;
  88                         list[3] = 180;
  89                         list[4] = 240;
  90                         list[5] = 360;
  91                         list[6] = 480;
  92                         list[7] = 540;
  93                         list[8] = -1;
  94                 }
  95                 conf->supported_rates = list;
  96         }
  97 #endif /* CONFIG_P2P */
  98
  99         if (ssid->ssid_len == 0) {
 100                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 101                 return -1;
 102         }
 103         os_memcpy(bss->ssid.ssid, ssid->ssid, ssid->ssid_len);
 104         bss->ssid.ssid[ssid->ssid_len] = '\0';
 105         bss->ssid.ssid_len = ssid->ssid_len;
 106         bss->ssid.ssid_set = 1;
 107
 108         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt))
 109                 bss->wpa = ssid->proto;
 110         bss->wpa_key_mgmt = ssid->key_mgmt;
 111         bss->wpa_pairwise = ssid->pairwise_cipher;
 112         if (ssid->passphrase) {
 113                 bss->ssid.wpa_passphrase = os_strdup(ssid->passphrase);
 114         } else if (ssid->psk_set) {
 115                 os_free(bss->ssid.wpa_psk);
 116                 bss->ssid.wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 117                 if (bss->ssid.wpa_psk == NULL)
 118                         return -1;
 119                 os_memcpy(bss->ssid.wpa_psk->psk, ssid->psk, PMK_LEN);
 120                 bss->ssid.wpa_psk->group = 1;
 121         }
 122
 123         /* Select group cipher based on the enabled pairwise cipher suites */
 124         pairwise = 0;
 125         if (bss->wpa & 1)
 126                 pairwise |= bss->wpa_pairwise;
 127         if (bss->wpa & 2) {
 128                 if (bss->rsn_pairwise == 0)
 129                         bss->rsn_pairwise = bss->wpa_pairwise;
 130                 pairwise |= bss->rsn_pairwise;
 131         }
 132         if (pairwise & WPA_CIPHER_TKIP)
 133                 bss->wpa_group = WPA_CIPHER_TKIP;
 134         else
 135                 bss->wpa_group = WPA_CIPHER_CCMP;
 136
 137         if (bss->wpa && bss->ieee802_1x)
 138                 bss->ssid.security_policy = SECURITY_WPA;
 139         else if (bss->wpa)
 140                 bss->ssid.security_policy = SECURITY_WPA_PSK;
 141         else if (bss->ieee802_1x) {
 142                 bss->ssid.security_policy = SECURITY_IEEE_802_1X;
 143                 bss->ssid.wep.default_len = bss->default_wep_key_len;
 144         } else if (bss->ssid.wep.keys_set)
 145                 bss->ssid.security_policy = SECURITY_STATIC_WEP;
 146         else
 147                 bss->ssid.security_policy = SECURITY_PLAINTEXT;
 148
 149 #ifdef CONFIG_WPS
 150         /*
 151          * Enable WPS by default, but require user interaction to actually use
 152          * it. Only the internal Registrar is supported.
 153          */
 154         bss->eap_server = 1;
 155         bss->wps_state = 2;
 156         bss->ap_setup_locked = 1;
 157         if (wpa_s->conf->config_methods)
 158                 bss->config_methods = os_strdup(wpa_s->conf->config_methods);
 159         if (wpa_s->conf->device_type)
 160                 bss->device_type = os_strdup(wpa_s->conf->device_type);
 161 #endif /* CONFIG_WPS */
 162
 163         return 0;
 164 }
 165
 166
 167 static void ap_public_action_rx(void *ctx, const u8 *buf, size_t len, int freq)
 168 {
 169 }
 170
 171
 172 static int ap_probe_req_rx(void *ctx, const u8 *addr, const u8 *ie,
 173                            size_t ie_len)
 174 {
 175         return 0;
 176 }
 177
 178
 179 static void ap_wps_reg_success_cb(void *ctx, const u8 *mac_addr,
 180                                   const u8 *uuid_e)
 181 {
 182 }
 183
 184
 185 int wpa_supplicant_create_ap(struct wpa_supplicant *wpa_s,
 186                              struct wpa_ssid *ssid)
 187 {
 188         struct wpa_driver_associate_params params;
 189         struct hostapd_iface *hapd_iface;
 190         struct hostapd_config *conf;
 191         size_t i;
 192
 193         if (ssid->ssid == NULL || ssid->ssid_len == 0) {
 194                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 195                 return -1;
 196         }
 197
 198         wpa_supplicant_ap_deinit(wpa_s);
 199
 200         wpa_printf(MSG_DEBUG, "Setting up AP (SSID='%s')",
 201                    wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 202
 203         os_memset(&params, 0, sizeof(params));
 204         params.ssid = ssid->ssid;
 205         params.ssid_len = ssid->ssid_len;
 206         switch (ssid->mode) {
 207         case WPAS_MODE_INFRA:
 208                 params.mode = IEEE80211_MODE_INFRA;
 209                 break;
 210         case WPAS_MODE_IBSS:
 211                 params.mode = IEEE80211_MODE_IBSS;
 212                 break;
 213         case WPAS_MODE_AP:
 214         case WPAS_MODE_P2P_GO:
 215         case WPAS_MODE_P2P_GROUP_FORMATION:
 216                 params.mode = IEEE80211_MODE_AP;
 217                 break;
 218         }
 219         params.freq = ssid->frequency;
 220
 221         if (ssid->key_mgmt & WPA_KEY_MGMT_PSK)
 222                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
 223         else
 224                 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE;
 225         params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
 226
 227         if (ssid->pairwise_cipher & WPA_CIPHER_CCMP)
 228                 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
 229         else if (ssid->pairwise_cipher & WPA_CIPHER_TKIP)
 230                 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
 231         else if (ssid->pairwise_cipher & WPA_CIPHER_NONE)
 232                 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 233         else {
 234                 wpa_printf(MSG_WARNING, "WPA: Failed to select pairwise "
 235                            "cipher.");
 236                 return -1;
 237         }
 238         params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
 239         params.group_suite = params.pairwise_suite;
 240
 241         if (wpa_drv_associate(wpa_s, &params) < 0) {
 242                 wpa_msg(wpa_s, MSG_INFO, "Failed to start AP functionality");
 243                 return -1;
 244         }
 245
 246         wpa_s->ap_iface = hapd_iface = os_zalloc(sizeof(*wpa_s->ap_iface));
 247         if (hapd_iface == NULL)
 248                 return -1;
 249         hapd_iface->owner = wpa_s;
 250
 251         wpa_s->ap_iface->conf = conf = hostapd_config_defaults();
 252         if (conf == NULL) {
 253                 wpa_supplicant_ap_deinit(wpa_s);
 254                 return -1;
 255         }
 256
 257         if (wpa_supplicant_conf_ap(wpa_s, ssid, conf)) {
 258                 wpa_printf(MSG_ERROR, "Failed to create AP configuration");
 259                 wpa_supplicant_ap_deinit(wpa_s);
 260                 return -1;
 261         }
 262
 263         hapd_iface->num_bss = conf->num_bss;
 264         hapd_iface->bss = os_zalloc(conf->num_bss *
 265                                     sizeof(struct hostapd_data *));
 266         if (hapd_iface->bss == NULL) {
 267                 wpa_supplicant_ap_deinit(wpa_s);
 268                 return -1;
 269         }
 270
 271         for (i = 0; i < conf->num_bss; i++) {
 272                 hapd_iface->bss[i] =
 273                         hostapd_alloc_bss_data(hapd_iface, conf,
 274                                                &conf->bss[i]);
 275                 if (hapd_iface->bss[i] == NULL) {
 276                         wpa_supplicant_ap_deinit(wpa_s);
 277                         return -1;
 278                 }
 279
 280                 hapd_iface->bss[i]->msg_ctx = wpa_s;
 281                 hapd_iface->bss[i]->public_action_cb = ap_public_action_rx;
 282                 hapd_iface->bss[i]->public_action_cb_ctx = wpa_s;
 283                 hostapd_register_probereq_cb(hapd_iface->bss[i],
 284                                              ap_probe_req_rx, wpa_s);
 285                 hapd_iface->bss[i]->wps_reg_success_cb = ap_wps_reg_success_cb;
 286                 hapd_iface->bss[i]->wps_reg_success_cb_ctx = wpa_s;
 287         }
 288
 289         os_memcpy(hapd_iface->bss[0]->own_addr, wpa_s->own_addr, ETH_ALEN);
 290         hapd_iface->bss[0]->driver = wpa_s->driver;
 291         hapd_iface->bss[0]->drv_priv = wpa_s->drv_priv;
 292
 293         if (hostapd_setup_interface(wpa_s->ap_iface)) {
 294                 wpa_printf(MSG_ERROR, "Failed to initialize AP interface");
 295                 wpa_supplicant_ap_deinit(wpa_s);
 296                 return -1;
 297         }
 298
 299         wpa_s->current_ssid = ssid;
 300         os_memcpy(wpa_s->bssid, wpa_s->own_addr, ETH_ALEN);
 301         wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 302
 303         if (wpa_s->ap_configured_cb)
 304                 wpa_s->ap_configured_cb(wpa_s->ap_configured_cb_ctx,
 305                                         wpa_s->ap_configured_cb_data);
 306
 307         return 0;
 308 }
 309
 310
 311 void wpa_supplicant_ap_deinit(struct wpa_supplicant *wpa_s)
 312 {
 313         if (wpa_s->ap_iface == NULL)
 314                 return;
 315
 316         wpa_s->current_ssid = NULL;
 317         hostapd_interface_deinit(wpa_s->ap_iface);
 318         hostapd_interface_free(wpa_s->ap_iface);
 319         wpa_s->ap_iface = NULL;
 320         wpa_drv_deinit_ap(wpa_s);
 321 }
 322
 323
 324 void ap_tx_status(void *ctx, const u8 *addr,
 325                   const u8 *buf, size_t len, int ack)
 326 {
 327 #ifdef NEED_AP_MLME
 328         struct wpa_supplicant *wpa_s = ctx;
 329         hostapd_tx_status(wpa_s->ap_iface->bss[0], addr, buf, len, ack);
 330 #endif /* NEED_AP_MLME */
 331 }
 332
 333
 334 void ap_rx_from_unknown_sta(void *ctx, const u8 *frame, size_t len)
 335 {
 336 #ifdef NEED_AP_MLME
 337         struct wpa_supplicant *wpa_s = ctx;
 338         const struct ieee80211_hdr *hdr =
 339                 (const struct ieee80211_hdr *) frame;
 340         u16 fc = le_to_host16(hdr->frame_control);
 341         ieee802_11_rx_from_unknown(wpa_s->ap_iface->bss[0], hdr->addr2,
 342                                    (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
 343                                    (WLAN_FC_TODS | WLAN_FC_FROMDS));
 344 #endif /* NEED_AP_MLME */
 345 }
 346
 347
 348 void ap_mgmt_rx(void *ctx, struct rx_mgmt *rx_mgmt)
 349 {
 350 #ifdef NEED_AP_MLME
 351         struct wpa_supplicant *wpa_s = ctx;
 352         struct hostapd_frame_info fi;
 353         os_memset(&fi, 0, sizeof(fi));
 354         fi.datarate = rx_mgmt->datarate;
 355         fi.ssi_signal = rx_mgmt->ssi_signal;
 356         ieee802_11_mgmt(wpa_s->ap_iface->bss[0], rx_mgmt->frame,
 357                         rx_mgmt->frame_len, &fi);
 358 #endif /* NEED_AP_MLME */
 359 }
 360
 361
 362 void ap_mgmt_tx_cb(void *ctx, const u8 *buf, size_t len, u16 stype, int ok)
 363 {
 364 #ifdef NEED_AP_MLME
 365         struct wpa_supplicant *wpa_s = ctx;
 366         ieee802_11_mgmt_cb(wpa_s->ap_iface->bss[0], buf, len, stype, ok);
 367 #endif /* NEED_AP_MLME */
 368 }
 369
 370
 371 void wpa_supplicant_ap_rx_eapol(struct wpa_supplicant *wpa_s,
 372                                 const u8 *src_addr, const u8 *buf, size_t len)
 373 {
 374         ieee802_1x_receive(wpa_s->ap_iface->bss[0], src_addr, buf, len);
 375 }
 376
 377
 378 #ifdef CONFIG_WPS
 379
 380 int wpa_supplicant_ap_wps_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 381 {
 382         if (!wpa_s->ap_iface)
 383                 return -1;
 384         return hostapd_wps_button_pushed(wpa_s->ap_iface->bss[0]);
 385 }
 386
 387
 388 int wpa_supplicant_ap_wps_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 389                               const char *pin, char *buf, size_t buflen)
 390 {
 391         int ret, ret_len = 0;
 392
 393         if (!wpa_s->ap_iface)
 394                 return -1;
 395
 396         if (pin == NULL) {
 397                 unsigned int rpin = wps_generate_pin();
 398                 ret_len = os_snprintf(buf, buflen, "%d", rpin);
 399                 pin = buf;
 400         }
 401
 402         ret = hostapd_wps_add_pin(wpa_s->ap_iface->bss[0], bssid, "any", pin,
 403                                   0);
 404         if (ret)
 405                 return -1;
 406         return ret_len;
 407 }
 408
 409 #endif /* CONFIG_WPS */
 410
 411
 412 #ifdef CONFIG_CTRL_IFACE
 413
 414 int ap_ctrl_iface_sta_first(struct wpa_supplicant *wpa_s,
 415                             char *buf, size_t buflen)
 416 {
 417         if (wpa_s->ap_iface == NULL)
 418                 return -1;
 419         return hostapd_ctrl_iface_sta_first(wpa_s->ap_iface->bss[0],
 420                                             buf, buflen);
 421 }
 422
 423
 424 int ap_ctrl_iface_sta(struct wpa_supplicant *wpa_s, const char *txtaddr,
 425                       char *buf, size_t buflen)
 426 {
 427         if (wpa_s->ap_iface == NULL)
 428                 return -1;
 429         return hostapd_ctrl_iface_sta(wpa_s->ap_iface->bss[0], txtaddr,
 430                                       buf, buflen);
 431 }
 432
 433
 434 int ap_ctrl_iface_sta_next(struct wpa_supplicant *wpa_s, const char *txtaddr,
 435                            char *buf, size_t buflen)
 436 {
 437         if (wpa_s->ap_iface == NULL)
 438                 return -1;
 439         return hostapd_ctrl_iface_sta_next(wpa_s->ap_iface->bss[0], txtaddr,
 440                                            buf, buflen);
 441 }
 442
 443
 444 int ap_ctrl_iface_wpa_get_status(struct wpa_supplicant *wpa_s, char *buf,
 445                                  size_t buflen, int verbose)
 446 {
 447         char *pos = buf, *end = buf + buflen;
 448         int ret;
 449         struct hostapd_bss_config *conf;
 450
 451         if (wpa_s->ap_iface == NULL)
 452                 return -1;
 453
 454         conf = wpa_s->ap_iface->bss[0]->conf;
 455         if (conf->wpa == 0)
 456                 return 0;
 457
 458         ret = os_snprintf(pos, end - pos,
 459                           "pairwise_cipher=%s\n"
 460                           "group_cipher=%s\n"
 461                           "key_mgmt=%s\n",
 462                           wpa_cipher_txt(conf->rsn_pairwise),
 463                           wpa_cipher_txt(conf->wpa_group),
 464                           wpa_key_mgmt_txt(conf->wpa_key_mgmt,
 465                                            conf->wpa));
 466         if (ret < 0 || ret >= end - pos)
 467                 return pos - buf;
 468         pos += ret;
 469         return pos - buf;
 470 }
 471
 472 #endif /* CONFIG_CTRL_IFACE */
 473
 474
 475 int wpa_supplicant_ap_update_beacon(struct wpa_supplicant *wpa_s)
 476 {
 477         struct hostapd_iface *iface = wpa_s->ap_iface;
 478         struct wpa_ssid *ssid = wpa_s->current_ssid;
 479         struct hostapd_data *hapd;
 480
 481         if (ssid == NULL || wpa_s->ap_iface == NULL)
 482                 return -1;
 483
 484         ieee802_11_set_beacons(iface);
 485         hapd = iface->bss[0];
 486         hapd->drv.set_ap_wps_ie(hapd);
 487
 488         return 0;
 489 }
 490
 491
 492 int wpa_supplicant_ap_mac_addr_filter(struct wpa_supplicant *wpa_s,
 493                                       const u8 *addr)
 494 {
 495         struct hostapd_data *hapd;
 496         struct hostapd_bss_config *conf;
 497
 498         if (!wpa_s->ap_iface)
 499                 return -1;
 500
 501         if (addr)
 502                 wpa_printf(MSG_DEBUG, "AP: Set MAC address filter: " MACSTR,
 503                            MAC2STR(addr));
 504         else
 505                 wpa_printf(MSG_DEBUG, "AP: Clear MAC address filter");
 506
 507         hapd = wpa_s->ap_iface->bss[0];
 508         conf = hapd->conf;
 509
 510         os_free(conf->accept_mac);
 511         conf->accept_mac = NULL;
 512         conf->num_accept_mac = 0;
 513         os_free(conf->deny_mac);
 514         conf->deny_mac = NULL;
 515         conf->num_deny_mac = 0;
 516
 517         if (addr == NULL) {
 518                 conf->macaddr_acl = ACCEPT_UNLESS_DENIED;
 519                 return 0;
 520         }
 521
 522         conf->macaddr_acl = DENY_UNLESS_ACCEPTED;
 523         conf->accept_mac = os_zalloc(sizeof(struct mac_acl_entry));
 524         if (conf->accept_mac == NULL)
 525                 return -1;
 526         os_memcpy(conf->accept_mac[0].addr, addr, ETH_ALEN);
 527         conf->num_accept_mac = 1;
 528
 529         return 0;
 530 }