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