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 #include "../hostapd/driver.h"
  22 #include "eap_common/eap_defs.h"
  23 #include "eap_server/eap_methods.h"
  24 #include "eap_common/eap_wsc_common.h"
  25 #include "config_ssid.h"
  26 #include "wpa_supplicant_i.h"
  27 #include "driver_i.h"
  28 #include "ap.h"
  29
  30
  31 int hostapd_for_each_interface(int (*cb)(struct hostapd_iface *iface,
  32                                          void *ctx), void *ctx)
  33 {
  34         /* TODO */
  35         return 0;
  36 }
  37
  38
  39 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
  40 {
  41         return 0;
  42 }
  43
  44
  45 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
  46 {
  47 }
  48
  49
  50 struct ap_driver_data {
  51         struct hostapd_data *hapd;
  52 };
  53
  54
  55 static void * ap_driver_init(struct hostapd_data *hapd)
  56 {
  57         struct ap_driver_data *drv;
  58
  59         drv = os_zalloc(sizeof(struct ap_driver_data));
  60         if (drv == NULL) {
  61                 wpa_printf(MSG_ERROR, "Could not allocate memory for AP "
  62                            "driver data");
  63                 return NULL;
  64         }
  65         drv->hapd = hapd;
  66
  67         return drv;
  68 }
  69
  70
  71 static void ap_driver_deinit(void *priv)
  72 {
  73         struct ap_driver_data *drv = priv;
  74
  75         os_free(drv);
  76 }
  77
  78
  79 static int ap_driver_send_ether(void *priv, const u8 *dst, const u8 *src,
  80                                 u16 proto, const u8 *data, size_t data_len)
  81 {
  82         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
  83         return -1;
  84 }
  85
  86
  87 static int ap_driver_set_key(const char *iface, void *priv, wpa_alg alg,
  88                              const u8 *addr, int key_idx, int set_tx,
  89                              const u8 *seq, size_t seq_len, const u8 *key,
  90                              size_t key_len)
  91 {
  92         struct ap_driver_data *drv = priv;
  93         struct wpa_supplicant *wpa_s = drv->hapd->iface->owner;
  94         return wpa_drv_set_key(wpa_s, alg, addr, key_idx, set_tx, seq, seq_len,
  95                                key, key_len);
  96 }
  97
  98
  99 static int ap_driver_get_seqnum(const char *iface, void *priv, const u8 *addr,
 100                                 int idx, u8 *seq)
 101 {
 102         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 103         return -1;
 104 }
 105
 106
 107 static int ap_driver_flush(void *priv)
 108 {
 109         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 110         return -1;
 111 }
 112
 113
 114 static int ap_driver_read_sta_data(void *priv,
 115                                    struct hostap_sta_driver_data *data,
 116                                    const u8 *addr)
 117 {
 118         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 119         return -1;
 120 }
 121
 122
 123 static int ap_driver_sta_set_flags(void *priv, const u8 *addr, int total_flags,
 124                                    int flags_or, int flags_and)
 125 {
 126         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 127         return -1;
 128 }
 129
 130
 131 static int ap_driver_sta_deauth(void *priv, const u8 *addr, int reason)
 132 {
 133         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 134         return -1;
 135 }
 136
 137
 138 static int ap_driver_sta_disassoc(void *priv, const u8 *addr, int reason)
 139 {
 140         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 141         return -1;
 142 }
 143
 144
 145 static int ap_driver_sta_remove(void *priv, const u8 *addr)
 146 {
 147         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 148         return -1;
 149 }
 150
 151
 152 static int ap_driver_send_mgmt_frame(void *priv, const void *data, size_t len,
 153                                      int flags)
 154 {
 155         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 156         return -1;
 157 }
 158
 159
 160 static int ap_driver_sta_add(const char *ifname, void *priv,
 161                              struct hostapd_sta_add_params *params)
 162 {
 163         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 164         return -1;
 165 }
 166
 167
 168 static int ap_driver_get_inact_sec(void *priv, const u8 *addr)
 169 {
 170         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 171         return -1;
 172 }
 173
 174
 175 static int ap_driver_set_freq(void *priv, struct hostapd_freq_params *freq)
 176 {
 177         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 178         return 0;
 179 }
 180
 181
 182 static int ap_driver_set_beacon(const char *iface, void *priv,
 183                                 u8 *head, size_t head_len,
 184                                 u8 *tail, size_t tail_len)
 185 {
 186         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 187         return -1;
 188 }
 189
 190
 191 static int ap_driver_set_beacon_int(void *priv, int value)
 192 {
 193         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 194         return -1;
 195 }
 196
 197
 198 static int ap_driver_set_dtim_period(const char *iface, void *priv, int value)
 199 {
 200         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 201         return -1;
 202 }
 203
 204
 205 static int ap_driver_set_cts_protect(void *priv, int value)
 206 {
 207         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 208         return -1;
 209 }
 210
 211
 212 static int ap_driver_set_preamble(void *priv, int value)
 213 {
 214         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 215         return -1;
 216 }
 217
 218
 219 static int ap_driver_set_short_slot_time(void *priv, int value)
 220 {
 221         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 222         return -1;
 223 }
 224
 225
 226 static int ap_driver_set_tx_queue_params(void *priv, int queue, int aifs,
 227                                          int cw_min, int cw_max,
 228                                          int burst_time)
 229 {
 230         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 231         return -1;
 232 }
 233
 234
 235 static struct hostapd_hw_modes *ap_driver_get_hw_feature_data(void *priv,
 236                                                               u16 *num_modes,
 237                                                               u16 *flags)
 238 {
 239         wpa_printf(MSG_DEBUG, "AP TODO: %s", __func__);
 240         return NULL;
 241 }
 242
 243
 244 static struct hapd_driver_ops ap_driver_ops =
 245 {
 246         .name = "wpa_supplicant",
 247         .init = ap_driver_init,
 248         .deinit = ap_driver_deinit,
 249         .send_ether = ap_driver_send_ether,
 250         .set_key = ap_driver_set_key,
 251         .get_seqnum = ap_driver_get_seqnum,
 252         .flush = ap_driver_flush,
 253         .read_sta_data = ap_driver_read_sta_data,
 254         .sta_set_flags = ap_driver_sta_set_flags,
 255         .sta_deauth = ap_driver_sta_deauth,
 256         .sta_disassoc = ap_driver_sta_disassoc,
 257         .sta_remove = ap_driver_sta_remove,
 258         .send_mgmt_frame = ap_driver_send_mgmt_frame,
 259         .sta_add = ap_driver_sta_add,
 260         .get_inact_sec = ap_driver_get_inact_sec,
 261         .set_freq = ap_driver_set_freq,
 262         .set_beacon = ap_driver_set_beacon,
 263         .set_beacon_int = ap_driver_set_beacon_int,
 264         .set_dtim_period = ap_driver_set_dtim_period,
 265         .set_cts_protect = ap_driver_set_cts_protect,
 266         .set_preamble = ap_driver_set_preamble,
 267         .set_short_slot_time = ap_driver_set_short_slot_time,
 268         .set_tx_queue_params = ap_driver_set_tx_queue_params,
 269         .get_hw_feature_data = ap_driver_get_hw_feature_data,
 270 };
 271
 272 struct hapd_driver_ops *hostapd_drivers[] =
 273 {
 274         &ap_driver_ops,
 275         NULL
 276 };
 277
 278
 279 static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
 280                                   struct wpa_ssid *ssid,
 281                                   struct hostapd_config *conf)
 282 {
 283         struct hostapd_bss_config *bss = &conf->bss[0];
 284
 285         os_strlcpy(bss->iface, wpa_s->ifname, sizeof(bss->iface));
 286
 287         if (ssid->frequency == 0) {
 288                 /* default channel 11 */
 289                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 290                 conf->channel = 11;
 291         } else if (ssid->frequency >= 2412 && ssid->frequency <= 2472) {
 292                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 293                 conf->channel = (ssid->frequency - 2407) / 5;
 294         } else if ((ssid->frequency >= 5180 && ssid->frequency <= 5240) ||
 295                    (ssid->frequency >= 5745 && ssid->frequency <= 5825)) {
 296                 conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
 297                 conf->channel = (ssid->frequency - 5000) / 5;
 298         } else {
 299                 wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: %d MHz",
 300                            ssid->frequency);
 301                 return -1;
 302         }
 303
 304         /* TODO: enable HT if driver supports it;
 305          * drop to 11b if driver does not support 11g */
 306
 307         if (ssid->ssid_len == 0) {
 308                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 309                 return -1;
 310         }
 311         os_memcpy(bss->ssid.ssid, ssid->ssid, ssid->ssid_len);
 312         bss->ssid.ssid[ssid->ssid_len] = '\0';
 313         bss->ssid.ssid_len = ssid->ssid_len;
 314         bss->ssid.ssid_set = 1;
 315
 316         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt))
 317                 bss->wpa = ssid->proto;
 318         bss->wpa_key_mgmt = ssid->key_mgmt;
 319         bss->wpa_pairwise = ssid->pairwise_cipher;
 320         if (ssid->passphrase) {
 321                 bss->ssid.wpa_passphrase = os_strdup(ssid->passphrase);
 322                 if (hostapd_setup_wpa_psk(bss))
 323                         return -1;
 324         } else if (ssid->psk_set) {
 325                 os_free(bss->ssid.wpa_psk);
 326                 bss->ssid.wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 327                 if (bss->ssid.wpa_psk == NULL)
 328                         return -1;
 329                 os_memcpy(bss->ssid.wpa_psk->psk, ssid->psk, PMK_LEN);
 330                 bss->ssid.wpa_psk->group = 1;
 331         }
 332
 333         return 0;
 334 }
 335
 336
 337 int wpa_supplicant_create_ap(struct wpa_supplicant *wpa_s,
 338                              struct wpa_ssid *ssid)
 339 {
 340         struct wpa_driver_associate_params params;
 341         struct hostapd_iface *hapd_iface;
 342         struct hostapd_config *conf;
 343         size_t i;
 344
 345         if (ssid->ssid == NULL || ssid->ssid_len == 0) {
 346                 wpa_printf(MSG_ERROR, "No SSID configured for AP mode");
 347                 return -1;
 348         }
 349
 350         wpa_supplicant_ap_deinit(wpa_s);
 351         wpa_s->ap_iface = hapd_iface = os_zalloc(sizeof(*wpa_s->ap_iface));
 352         if (hapd_iface == NULL)
 353                 return -1;
 354         hapd_iface->owner = wpa_s;
 355
 356         wpa_s->ap_iface->conf = conf = hostapd_config_defaults();
 357         if (conf == NULL) {
 358                 wpa_supplicant_ap_deinit(wpa_s);
 359                 return -1;
 360         }
 361
 362         if (wpa_supplicant_conf_ap(wpa_s, ssid, conf)) {
 363                 wpa_printf(MSG_ERROR, "Failed to create AP configuration");
 364                 wpa_supplicant_ap_deinit(wpa_s);
 365                 return -1;
 366         }
 367
 368         hapd_iface->num_bss = conf->num_bss;
 369         hapd_iface->bss = os_zalloc(conf->num_bss *
 370                                     sizeof(struct hostapd_data *));
 371         if (hapd_iface->bss == NULL) {
 372                 wpa_supplicant_ap_deinit(wpa_s);
 373                 return -1;
 374         }
 375
 376         for (i = 0; i < conf->num_bss; i++) {
 377                 hapd_iface->bss[i] =
 378                         hostapd_alloc_bss_data(hapd_iface, conf,
 379                                                &conf->bss[i]);
 380                 if (hapd_iface->bss[i] == NULL) {
 381                         wpa_supplicant_ap_deinit(wpa_s);
 382                         return -1;
 383                 }
 384         }
 385
 386         if (hostapd_setup_interface(wpa_s->ap_iface)) {
 387                 wpa_printf(MSG_ERROR, "Failed to initialize AP interface");
 388                 wpa_supplicant_ap_deinit(wpa_s);
 389                 return -1;
 390         }
 391
 392         wpa_printf(MSG_DEBUG, "Setting up AP (SSID='%s')",
 393                    wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 394
 395         os_memset(&params, 0, sizeof(params));
 396         params.ssid = ssid->ssid;
 397         params.ssid_len = ssid->ssid_len;
 398         params.mode = ssid->mode;
 399
 400         if (wpa_drv_associate(wpa_s, &params) < 0) {
 401                 wpa_msg(wpa_s, MSG_INFO, "Failed to start AP functionality");
 402                 return -1;
 403         }
 404
 405         return 0;
 406 }
 407
 408
 409 void wpa_supplicant_ap_deinit(struct wpa_supplicant *wpa_s)
 410 {
 411         if (wpa_s->ap_iface == NULL)
 412                 return;
 413
 414         hostapd_interface_deinit(wpa_s->ap_iface);
 415         wpa_s->ap_iface = NULL;
 416 }