dist/wpa/src/drivers/driver_prism54.c

   1 /*
   2  * WPA Supplicant - driver interaction with Linux Prism54.org driver
   3  * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2004, Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
   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 #include <sys/ioctl.h>
  18
  19 #include "wireless_copy.h"
  20 #include "common.h"
  21 #include "driver.h"
  22 #include "driver_wext.h"
  23 #include "driver_hostap.h"
  24
  25 struct wpa_driver_prism54_data {
  26         void *wext; /* private data for driver_wext */
  27         void *ctx;
  28         char ifname[IFNAMSIZ + 1];
  29         int sock;
  30 };
  31
  32 #define PRISM54_SET_WPA                 SIOCIWFIRSTPRIV+12
  33 #define PRISM54_HOSTAPD                 SIOCIWFIRSTPRIV+25
  34 #define PRISM54_DROP_UNENCRYPTED        SIOCIWFIRSTPRIV+26
  35
  36 static void show_set_key_error(struct prism2_hostapd_param *);
  37
  38 static int hostapd_ioctl_prism54(struct wpa_driver_prism54_data *drv,
  39                                  struct prism2_hostapd_param *param,
  40                                  int len, int show_err)
  41 {
  42         struct iwreq iwr;
  43
  44         os_memset(&iwr, 0, sizeof(iwr));
  45         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
  46         iwr.u.data.pointer = (caddr_t) param;
  47         iwr.u.data.length = len;
  48
  49         if (ioctl(drv->sock, PRISM54_HOSTAPD, &iwr) < 0) {
  50                 int ret = errno;
  51                 if (show_err)
  52                         perror("ioctl[PRISM54_HOSTAPD]");
  53                 return ret;
  54         }
  55
  56         return 0;
  57 }
  58
  59
  60 static int wpa_driver_prism54_set_wpa_ie(struct wpa_driver_prism54_data *drv,
  61                                          const u8 *wpa_ie,
  62                                          size_t wpa_ie_len)
  63 {
  64         struct prism2_hostapd_param *param;
  65         int res;
  66         size_t blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + wpa_ie_len;
  67         if (blen < sizeof(*param))
  68                 blen = sizeof(*param);
  69
  70         param = os_zalloc(blen);
  71         if (param == NULL)
  72                 return -1;
  73
  74         param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT;
  75         param->u.generic_elem.len = wpa_ie_len;
  76         os_memcpy(param->u.generic_elem.data, wpa_ie, wpa_ie_len);
  77         res = hostapd_ioctl_prism54(drv, param, blen, 1);
  78
  79         os_free(param);
  80
  81         return res;
  82 }
  83
  84
  85 /* This is called at wpa_supplicant daemon init time */
  86 static int wpa_driver_prism54_set_wpa(void *priv, int enabled)
  87 {
  88         struct wpa_driver_prism54_data *drv = priv;
  89         struct prism2_hostapd_param *param;
  90         int res;
  91         size_t blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN;
  92         if (blen < sizeof(*param))
  93                 blen = sizeof(*param);
  94
  95         param = os_zalloc(blen);
  96         if (param == NULL)
  97                 return -1;
  98
  99         param->cmd = PRISM54_SET_WPA;
 100         param->u.generic_elem.len = 0;
 101         res = hostapd_ioctl_prism54(drv, param, blen, 1);
 102
 103         os_free(param);
 104
 105         return res;
 106 }
 107
 108
 109 static int wpa_driver_prism54_set_key(void *priv, wpa_alg alg,
 110                                       const u8 *addr, int key_idx, int set_tx,
 111                                       const u8 *seq, size_t seq_len,
 112                                       const u8 *key, size_t key_len)
 113 {
 114         struct wpa_driver_prism54_data *drv = priv;
 115         struct prism2_hostapd_param *param;
 116         u8 *buf;
 117         size_t blen;
 118         int ret = 0;
 119         char *alg_name;
 120
 121         switch (alg) {
 122         case WPA_ALG_NONE:
 123                 alg_name = "none";
 124                 return -1;
 125                 break;
 126         case WPA_ALG_WEP:
 127                 alg_name = "WEP";
 128                 return -1;
 129                 break;
 130         case WPA_ALG_TKIP:
 131                 alg_name = "TKIP";
 132                 break;
 133         case WPA_ALG_CCMP:
 134                 alg_name = "CCMP";
 135                 return -1;
 136                 break;
 137         default:
 138                 return -1;
 139         }
 140
 141         wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
 142                    "key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
 143                    (unsigned long) seq_len, (unsigned long) key_len);
 144
 145         if (seq_len > 8)
 146                 return -2;
 147
 148         blen = sizeof(*param) + key_len;
 149         buf = os_zalloc(blen);
 150         if (buf == NULL)
 151                 return -1;
 152
 153         param = (struct prism2_hostapd_param *) buf;
 154         param->cmd = PRISM2_SET_ENCRYPTION;
 155         /* TODO: In theory, STA in client mode can use five keys; four default
 156          * keys for receiving (with keyidx 0..3) and one individual key for
 157          * both transmitting and receiving (keyidx 0) _unicast_ packets. Now,
 158          * keyidx 0 is reserved for this unicast use and default keys can only
 159          * use keyidx 1..3 (i.e., default key with keyidx 0 is not supported).
 160          * This should be fine for more or less all cases, but for completeness
 161          * sake, the driver could be enhanced to support the missing key. */
 162 #if 0
 163         if (addr == NULL)
 164                 os_memset(param->sta_addr, 0xff, ETH_ALEN);
 165         else
 166                 os_memcpy(param->sta_addr, addr, ETH_ALEN);
 167 #else
 168         os_memset(param->sta_addr, 0xff, ETH_ALEN);
 169 #endif
 170         os_strlcpy((char *) param->u.crypt.alg, alg_name,
 171                    HOSTAP_CRYPT_ALG_NAME_LEN);
 172         param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0;
 173         param->u.crypt.idx = key_idx;
 174         os_memcpy(param->u.crypt.seq, seq, seq_len);
 175         param->u.crypt.key_len = key_len;
 176         os_memcpy((u8 *) (param + 1), key, key_len);
 177
 178         if (hostapd_ioctl_prism54(drv, param, blen, 1)) {
 179                 wpa_printf(MSG_WARNING, "Failed to set encryption.");
 180                 show_set_key_error(param);
 181                 ret = -1;
 182         }
 183         os_free(buf);
 184
 185         return ret;
 186 }
 187
 188
 189 static int wpa_driver_prism54_set_countermeasures(void *priv,
 190                                                  int enabled)
 191 {
 192         /* FIX */
 193         printf("wpa_driver_prism54_set_countermeasures - not yet "
 194                "implemented\n");
 195         return 0;
 196 }
 197
 198
 199 static int wpa_driver_prism54_set_drop_unencrypted(void *priv,
 200                                                   int enabled)
 201 {
 202         struct wpa_driver_prism54_data *drv = priv;
 203         struct prism2_hostapd_param *param;
 204         int res;
 205         size_t blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN;
 206         if (blen < sizeof(*param))
 207                 blen = sizeof(*param);
 208
 209         param = os_zalloc(blen);
 210         if (param == NULL)
 211                 return -1;
 212
 213         param->cmd = PRISM54_DROP_UNENCRYPTED;
 214         param->u.generic_elem.len = 0;
 215         res = hostapd_ioctl_prism54(drv, param, blen, 1);
 216
 217         os_free(param);
 218
 219         return res;
 220 }
 221
 222
 223 static int wpa_driver_prism54_deauthenticate(void *priv, const u8 *addr,
 224                                              int reason_code)
 225 {
 226         /* FIX */
 227         printf("wpa_driver_prism54_deauthenticate - not yet implemented\n");
 228         return 0;
 229 }
 230
 231
 232 static int wpa_driver_prism54_disassociate(void *priv, const u8 *addr,
 233                                            int reason_code)
 234 {
 235         /* FIX */
 236         printf("wpa_driver_prism54_disassociate - not yet implemented\n");
 237         return 0;
 238 }
 239
 240
 241 static int
 242 wpa_driver_prism54_associate(void *priv,
 243                              struct wpa_driver_associate_params *params)
 244 {
 245         struct wpa_driver_prism54_data *drv = priv;
 246         int ret = 0;
 247
 248         if (wpa_driver_prism54_set_wpa_ie(drv, params->wpa_ie,
 249                                           params->wpa_ie_len) < 0)
 250                 ret = -1;
 251         if (wpa_driver_wext_set_freq(drv->wext, params->freq) < 0)
 252                 ret = -1;
 253         if (wpa_driver_wext_set_ssid(drv->wext, params->ssid,
 254                                      params->ssid_len) < 0)
 255                 ret = -1;
 256         if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0)
 257                 ret = -1;
 258
 259         return ret;
 260 }
 261
 262 static void show_set_key_error(struct prism2_hostapd_param *param)
 263 {
 264         switch (param->u.crypt.err) {
 265         case HOSTAP_CRYPT_ERR_UNKNOWN_ALG:
 266                 wpa_printf(MSG_INFO, "Unknown algorithm '%s'.",
 267                            param->u.crypt.alg);
 268                 wpa_printf(MSG_INFO, "You may need to load kernel module to "
 269                            "register that algorithm.");
 270                 wpa_printf(MSG_INFO, "E.g., 'modprobe hostap_crypt_wep' for "
 271                            "WEP.");
 272                 break;
 273         case HOSTAP_CRYPT_ERR_UNKNOWN_ADDR:
 274                 wpa_printf(MSG_INFO, "Unknown address " MACSTR ".",
 275                            MAC2STR(param->sta_addr));
 276                 break;
 277         case HOSTAP_CRYPT_ERR_CRYPT_INIT_FAILED:
 278                 wpa_printf(MSG_INFO, "Crypt algorithm initialization failed.");
 279                 break;
 280         case HOSTAP_CRYPT_ERR_KEY_SET_FAILED:
 281                 wpa_printf(MSG_INFO, "Key setting failed.");
 282                 break;
 283         case HOSTAP_CRYPT_ERR_TX_KEY_SET_FAILED:
 284                 wpa_printf(MSG_INFO, "TX key index setting failed.");
 285                 break;
 286         case HOSTAP_CRYPT_ERR_CARD_CONF_FAILED:
 287                 wpa_printf(MSG_INFO, "Card configuration failed.");
 288                 break;
 289         }
 290 }
 291
 292
 293 static int wpa_driver_prism54_get_bssid(void *priv, u8 *bssid)
 294 {
 295         struct wpa_driver_prism54_data *drv = priv;
 296         return wpa_driver_wext_get_bssid(drv->wext, bssid);
 297 }
 298
 299
 300 static int wpa_driver_prism54_get_ssid(void *priv, u8 *ssid)
 301 {
 302         struct wpa_driver_prism54_data *drv = priv;
 303         return wpa_driver_wext_get_ssid(drv->wext, ssid);
 304 }
 305
 306
 307 static int wpa_driver_prism54_scan(void *priv, const u8 *ssid, size_t ssid_len)
 308 {
 309         struct wpa_driver_prism54_data *drv = priv;
 310         return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
 311 }
 312
 313
 314 static struct wpa_scan_results *
 315 wpa_driver_prism54_get_scan_results(void *priv)
 316 {
 317         struct wpa_driver_prism54_data *drv = priv;
 318         return wpa_driver_wext_get_scan_results(drv->wext);
 319 }
 320
 321
 322 static int wpa_driver_prism54_set_operstate(void *priv, int state)
 323 {
 324         struct wpa_driver_prism54_data *drv = priv;
 325         return wpa_driver_wext_set_operstate(drv->wext, state);
 326 }
 327
 328
 329 static void * wpa_driver_prism54_init(void *ctx, const char *ifname)
 330 {
 331         struct wpa_driver_prism54_data *drv;
 332
 333         drv = os_zalloc(sizeof(*drv));
 334         if (drv == NULL)
 335                 return NULL;
 336         drv->wext = wpa_driver_wext_init(ctx, ifname);
 337         if (drv->wext == NULL) {
 338                 os_free(drv);
 339                 return NULL;
 340         }
 341
 342         drv->ctx = ctx;
 343         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 344         drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
 345         if (drv->sock < 0) {
 346                 wpa_driver_wext_deinit(drv->wext);
 347                 os_free(drv);
 348                 return NULL;
 349         }
 350
 351         return drv;
 352 }
 353
 354
 355 static void wpa_driver_prism54_deinit(void *priv)
 356 {
 357         struct wpa_driver_prism54_data *drv = priv;
 358         wpa_driver_wext_deinit(drv->wext);
 359         close(drv->sock);
 360         os_free(drv);
 361 }
 362
 363
 364 const struct wpa_driver_ops wpa_driver_prism54_ops = {
 365         .name = "prism54",
 366         .desc = "Prism54.org driver (Intersil Prism GT/Duette/Indigo)",
 367         .get_bssid = wpa_driver_prism54_get_bssid,
 368         .get_ssid = wpa_driver_prism54_get_ssid,
 369         .set_wpa = wpa_driver_prism54_set_wpa,
 370         .set_key = wpa_driver_prism54_set_key,
 371         .set_countermeasures = wpa_driver_prism54_set_countermeasures,
 372         .set_drop_unencrypted = wpa_driver_prism54_set_drop_unencrypted,
 373         .scan = wpa_driver_prism54_scan,
 374         .get_scan_results2 = wpa_driver_prism54_get_scan_results,
 375         .deauthenticate = wpa_driver_prism54_deauthenticate,
 376         .disassociate = wpa_driver_prism54_disassociate,
 377         .associate = wpa_driver_prism54_associate,
 378         .init = wpa_driver_prism54_init,
 379         .deinit = wpa_driver_prism54_deinit,
 380         .set_operstate = wpa_driver_prism54_set_operstate,
 381 };