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 "ap/hostapd.h"
  20 #include "ap/config.h"
  21 #ifdef NEED_AP_MLME
  22 #include "ap/ieee802_11.h"
  23 #endif /* NEED_AP_MLME */
  24 #include "ap/wps_hostapd.h"
  25 #include "ap/ctrl_iface_ap.h"
  26 #include "eap_common/eap_defs.h"
  27 #include "eap_server/eap_methods.h"
  28 #include "eap_common/eap_wsc_common.h"
  29 #include "wps/wps.h"
  30 #include "config_ssid.h"
  31 #include "config.h"
  32 #include "wpa_supplicant_i.h"
  33 #include "driver_i.h"
  34 #include "ap.h"
  35
  36
  37 struct hapd_interfaces {
  38         size_t count;
  39         struct hostapd_iface **iface;
  40 };
  41
  42
  43 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  44                                int (*cb)(struct hostapd_iface *iface,
  45                                          void *ctx), void *ctx)
  46 {
  47         /* TODO */
  48         return 0;
  49 }
  50
  51
  52 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
  53 {
  54         return 0;
  55 }
  56
  57
  58 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
  59 {
  60 }
  61
  62
  63 static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
  64                                   struct wpa_ssid *ssid,
  65                                   struct hostapd_config *conf)
  66 {
  67         struct hostapd_bss_config *bss = &conf->bss[0];
  68         int pairwise;
  69
  70         conf->driver = wpa_s->driver;
  71
  72         os_strlcpy(bss->iface, wpa_s->ifname, sizeof(bss->iface));
  73
  74         if (ssid->frequency == 0) {
  75                 /* default channel 11 */
  76                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
  77                 conf->channel = 11;
  78         } else if (ssid->frequency >= 2412 && ssid->frequency <= 2472) {
  79                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
  80                 conf->channel = (ssid->frequency - 2407) / 5;
  81         } else if ((ssid->frequency >= 5180 && ssid->frequency <= 5240) ||
  82                    (ssid->frequency >= 5745 && ssid->frequency <= 5825)) {
  83                 conf->hw_mode = HOSTAPD_MODE_IEEE80211A;
  84                 conf->channel = (ssid->frequency - 5000) / 5;
  85         } else {
  86                 wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: %d MHz",
  87                            ssid->frequency);
  88                 return -1;
  89         }
  90
  91         /* TODO: enable HT if driver supports it;
  92          * drop to 11b if driver does not support 11g */
  93
  94         if (ssid->ssid_len == 0) {
  95                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
  96                 return -1;
  97         }
  98         os_memcpy(bss->ssid.ssid, ssid->ssid, ssid->ssid_len);
  99         bss->ssid.ssid[ssid->ssid_len] = '\0';
 100         bss->ssid.ssid_len = ssid->ssid_len;
 101         bss->ssid.ssid_set = 1;
 102
 103         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt))
 104                 bss->wpa = ssid->proto;
 105         bss->wpa_key_mgmt = ssid->key_mgmt;
 106         bss->wpa_pairwise = ssid->pairwise_cipher;
 107         if (ssid->passphrase) {
 108                 bss->ssid.wpa_passphrase = os_strdup(ssid->passphrase);
 109         } else if (ssid->psk_set) {
 110                 os_free(bss->ssid.wpa_psk);
 111                 bss->ssid.wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 112                 if (bss->ssid.wpa_psk == NULL)
 113                         return -1;
 114                 os_memcpy(bss->ssid.wpa_psk->psk, ssid->psk, PMK_LEN);
 115                 bss->ssid.wpa_psk->group = 1;
 116         }
 117
 118         /* Select group cipher based on the enabled pairwise cipher suites */
 119         pairwise = 0;
 120         if (bss->wpa & 1)
 121                 pairwise |= bss->wpa_pairwise;
 122         if (bss->wpa & 2) {
 123                 if (bss->rsn_pairwise == 0)
 124                         bss->rsn_pairwise = bss->wpa_pairwise;
 125                 pairwise |= bss->rsn_pairwise;
 126         }
 127         if (pairwise & WPA_CIPHER_TKIP)
 128                 bss->wpa_group = WPA_CIPHER_TKIP;
 129         else
 130                 bss->wpa_group = WPA_CIPHER_CCMP;
 131
 132         if (bss->wpa && bss->ieee802_1x)
 133                 bss->ssid.security_policy = SECURITY_WPA;
 134         else if (bss->wpa)
 135                 bss->ssid.security_policy = SECURITY_WPA_PSK;
 136         else if (bss->ieee802_1x) {
 137                 bss->ssid.security_policy = SECURITY_IEEE_802_1X;
 138                 bss->ssid.wep.default_len = bss->default_wep_key_len;
 139         } else if (bss->ssid.wep.keys_set)
 140                 bss->ssid.security_policy = SECURITY_STATIC_WEP;
 141         else
 142                 bss->ssid.security_policy = SECURITY_PLAINTEXT;
 143
 144 #ifdef CONFIG_WPS
 145         /*
 146          * Enable WPS by default, but require user interaction to actually use
 147          * it. Only the internal Registrar is supported.
 148          */
 149         bss->eap_server = 1;
 150         bss->wps_state = 2;
 151         bss->ap_setup_locked = 1;
 152         if (wpa_s->conf->config_methods)
 153                 bss->config_methods = os_strdup(wpa_s->conf->config_methods);
 154         if (wpa_s->conf->device_type)
 155                 bss->device_type = os_strdup(wpa_s->conf->device_type);
 156 #endif /* CONFIG_WPS */
 157
 158         return 0;
 159 }
 160
 161
 162 int wpa_supplicant_create_ap(struct wpa_supplicant *wpa_s,
 163                              struct wpa_ssid *ssid)
 164 {
 165         struct wpa_driver_associate_params params;
 166         struct hostapd_iface *hapd_iface;
 167         struct hostapd_config *conf;
 168         size_t i;
 169
 170         if (ssid->ssid == NULL || ssid->ssid_len == 0) {
 171                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 172                 return -1;
 173         }
 174
 175         wpa_supplicant_ap_deinit(wpa_s);
 176
 177         wpa_printf(MSG_DEBUG, "Setting up AP (SSID='%s')",
 178                    wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 179
 180         os_memset(&params, 0, sizeof(params));
 181         params.ssid = ssid->ssid;
 182         params.ssid_len = ssid->ssid_len;
 183         params.mode = ssid->mode;
 184         params.freq = ssid->frequency;
 185
 186         if (wpa_drv_associate(wpa_s, &params) < 0) {
 187                 wpa_msg(wpa_s, MSG_INFO, "Failed to start AP functionality");
 188                 return -1;
 189         }
 190
 191         wpa_s->ap_iface = hapd_iface = os_zalloc(sizeof(*wpa_s->ap_iface));
 192         if (hapd_iface == NULL)
 193                 return -1;
 194         hapd_iface->owner = wpa_s;
 195
 196         wpa_s->ap_iface->conf = conf = hostapd_config_defaults();
 197         if (conf == NULL) {
 198                 wpa_supplicant_ap_deinit(wpa_s);
 199                 return -1;
 200         }
 201
 202         if (wpa_supplicant_conf_ap(wpa_s, ssid, conf)) {
 203                 wpa_printf(MSG_ERROR, "Failed to create AP configuration");
 204                 wpa_supplicant_ap_deinit(wpa_s);
 205                 return -1;
 206         }
 207
 208         hapd_iface->num_bss = conf->num_bss;
 209         hapd_iface->bss = os_zalloc(conf->num_bss *
 210                                     sizeof(struct hostapd_data *));
 211         if (hapd_iface->bss == NULL) {
 212                 wpa_supplicant_ap_deinit(wpa_s);
 213                 return -1;
 214         }
 215
 216         for (i = 0; i < conf->num_bss; i++) {
 217                 hapd_iface->bss[i] =
 218                         hostapd_alloc_bss_data(hapd_iface, conf,
 219                                                &conf->bss[i]);
 220                 if (hapd_iface->bss[i] == NULL) {
 221                         wpa_supplicant_ap_deinit(wpa_s);
 222                         return -1;
 223                 }
 224
 225                 hapd_iface->bss[i]->msg_ctx = wpa_s;
 226         }
 227
 228         os_memcpy(hapd_iface->bss[0]->own_addr, wpa_s->own_addr, ETH_ALEN);
 229         hapd_iface->bss[0]->driver = wpa_s->driver;
 230         hapd_iface->bss[0]->drv_priv = wpa_s->drv_priv;
 231
 232         if (hostapd_setup_interface(wpa_s->ap_iface)) {
 233                 wpa_printf(MSG_ERROR, "Failed to initialize AP interface");
 234                 wpa_supplicant_ap_deinit(wpa_s);
 235                 return -1;
 236         }
 237
 238         wpa_s->current_ssid = ssid;
 239         os_memcpy(wpa_s->bssid, wpa_s->own_addr, ETH_ALEN);
 240         wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 241
 242         return 0;
 243 }
 244
 245
 246 void wpa_supplicant_ap_deinit(struct wpa_supplicant *wpa_s)
 247 {
 248         if (wpa_s->ap_iface == NULL)
 249                 return;
 250
 251         hostapd_interface_deinit(wpa_s->ap_iface);
 252         wpa_s->ap_iface = NULL;
 253 }
 254
 255
 256 void ap_tx_status(void *ctx, const u8 *addr,
 257                   const u8 *buf, size_t len, int ack)
 258 {
 259 #ifdef NEED_AP_MLME
 260         struct wpa_supplicant *wpa_s = ctx;
 261         hostapd_tx_status(wpa_s->ap_iface->bss[0], addr, buf, len, ack);
 262 #endif /* NEED_AP_MLME */
 263 }
 264
 265
 266 void ap_rx_from_unknown_sta(void *ctx, const struct ieee80211_hdr *hdr,
 267                             size_t len)
 268 {
 269 #ifdef NEED_AP_MLME
 270         struct wpa_supplicant *wpa_s = ctx;
 271         u16 fc = le_to_host16(hdr->frame_control);
 272         ieee802_11_rx_from_unknown(wpa_s->ap_iface->bss[0], hdr->addr2,
 273                                    (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
 274                                    (WLAN_FC_TODS | WLAN_FC_FROMDS));
 275 #endif /* NEED_AP_MLME */
 276 }
 277
 278
 279 void ap_mgmt_rx(void *ctx, const u8 *buf, size_t len,
 280                 struct hostapd_frame_info *fi)
 281 {
 282 #ifdef NEED_AP_MLME
 283         struct wpa_supplicant *wpa_s = ctx;
 284         ieee802_11_mgmt(wpa_s->ap_iface->bss[0], buf, len, fi);
 285 #endif /* NEED_AP_MLME */
 286 }
 287
 288
 289 void ap_mgmt_tx_cb(void *ctx, const u8 *buf, size_t len, u16 stype, int ok)
 290 {
 291 #ifdef NEED_AP_MLME
 292         struct wpa_supplicant *wpa_s = ctx;
 293         ieee802_11_mgmt_cb(wpa_s->ap_iface->bss[0], buf, len, stype, ok);
 294 #endif /* NEED_AP_MLME */
 295 }
 296
 297
 298 void wpa_supplicant_ap_rx_eapol(struct wpa_supplicant *wpa_s,
 299                                 const u8 *src_addr, const u8 *buf, size_t len)
 300 {
 301         hostapd_eapol_receive(wpa_s->ap_iface->bss[0], src_addr, buf, len);
 302 }
 303
 304
 305 #ifdef CONFIG_WPS
 306
 307 int wpa_supplicant_ap_wps_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 308 {
 309         return hostapd_wps_button_pushed(wpa_s->ap_iface->bss[0]);
 310 }
 311
 312
 313 int wpa_supplicant_ap_wps_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 314                               const char *pin, char *buf, size_t buflen)
 315 {
 316         int ret, ret_len = 0;
 317
 318         if (pin == NULL) {
 319                 unsigned int rpin = wps_generate_pin();
 320                 ret_len = os_snprintf(buf, buflen, "%d", rpin);
 321                 pin = buf;
 322         }
 323
 324         ret = hostapd_wps_add_pin(wpa_s->ap_iface->bss[0], "any", pin, 0);
 325         if (ret)
 326                 return -1;
 327         return ret_len;
 328 }
 329
 330 #endif /* CONFIG_WPS */
 331
 332
 333 #ifdef CONFIG_CTRL_IFACE
 334
 335 int ap_ctrl_iface_sta_first(struct wpa_supplicant *wpa_s,
 336                             char *buf, size_t buflen)
 337 {
 338         if (wpa_s->ap_iface == NULL)
 339                 return -1;
 340         return hostapd_ctrl_iface_sta_first(wpa_s->ap_iface->bss[0],
 341                                             buf, buflen);
 342 }
 343
 344
 345 int ap_ctrl_iface_sta(struct wpa_supplicant *wpa_s, const char *txtaddr,
 346                       char *buf, size_t buflen)
 347 {
 348         if (wpa_s->ap_iface == NULL)
 349                 return -1;
 350         return hostapd_ctrl_iface_sta(wpa_s->ap_iface->bss[0], txtaddr,
 351                                       buf, buflen);
 352 }
 353
 354
 355 int ap_ctrl_iface_sta_next(struct wpa_supplicant *wpa_s, const char *txtaddr,
 356                            char *buf, size_t buflen)
 357 {
 358         if (wpa_s->ap_iface == NULL)
 359                 return -1;
 360         return hostapd_ctrl_iface_sta_next(wpa_s->ap_iface->bss[0], txtaddr,
 361                                            buf, buflen);
 362 }
 363
 364
 365 int ap_ctrl_iface_wpa_get_status(struct wpa_supplicant *wpa_s, char *buf,
 366                                  size_t buflen, int verbose)
 367 {
 368         char *pos = buf, *end = buf + buflen;
 369         int ret;
 370         struct hostapd_bss_config *conf;
 371
 372         if (wpa_s->ap_iface == NULL)
 373                 return -1;
 374
 375         conf = wpa_s->ap_iface->bss[0]->conf;
 376         if (conf->wpa == 0)
 377                 return 0;
 378
 379         ret = os_snprintf(pos, end - pos,
 380                           "pairwise_cipher=%s\n"
 381                           "group_cipher=%s\n"
 382                           "key_mgmt=%s\n",
 383                           wpa_cipher_txt(conf->rsn_pairwise),
 384                           wpa_cipher_txt(conf->wpa_group),
 385                           wpa_key_mgmt_txt(conf->wpa_key_mgmt,
 386                                            conf->wpa));
 387         if (ret < 0 || ret >= end - pos)
 388                 return pos - buf;
 389         pos += ret;
 390         return pos - buf;
 391 }
 392
 393 #endif /* CONFIG_CTRL_IFACE */