contrib/hostapd/src/drivers/driver_atmel.c

   1 /*
   2  * WPA Supplicant - Driver interaction with Atmel Wireless LAN drivers
   3  * Copyright (c) 2000-2005, ATMEL Corporation
   4  * Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi>
   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 /******************************************************************************
  17         Copyright 2000-2001 ATMEL Corporation.
  18
  19     WPA Supplicant - driver interaction with Atmel Wireless lan drivers.
  20
  21     This is free software; you can redistribute it and/or modify
  22     it under the terms of the GNU General Public License as published by
  23     the Free Software Foundation; either version 2 of the License, or
  24     (at your option) any later version.
  25
  26     This program is distributed in the hope that it will be useful,
  27     but WITHOUT ANY WARRANTY; without even the implied warranty of
  28     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  29     GNU General Public License for more details.
  30
  31     You should have received a copy of the GNU General Public License
  32     along with Atmel wireless lan drivers; if not, write to the Free Software
  33     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  34
  35 ******************************************************************************/
  36
  37 /*
  38  * Alternatively, this software may be distributed under the terms of BSD
  39  * license.
  40  */
  41
  42 #include "includes.h"
  43 #include <sys/ioctl.h>
  44
  45 #include "wireless_copy.h"
  46 #include "common.h"
  47 #include "driver.h"
  48 #include "driver_wext.h"
  49
  50 struct wpa_driver_atmel_data {
  51         void *wext; /* private data for driver_wext */
  52         void *ctx;
  53         char ifname[IFNAMSIZ + 1];
  54         int sock;
  55 };
  56
  57
  58 #define ATMEL_WPA_IOCTL                (SIOCIWFIRSTPRIV + 2)
  59 #define ATMEL_WPA_IOCTL_PARAM          (SIOCIWFIRSTPRIV + 3)
  60 #define ATMEL_WPA_IOCTL_GET_PARAM      (SIOCIWFIRSTPRIV + 4)
  61
  62
  63 /* ATMEL_WPA_IOCTL ioctl() cmd: */
  64 enum {
  65     SET_WPA_ENCRYPTION  = 1,
  66     SET_CIPHER_SUITES   = 2,
  67     MLME_STA_DEAUTH     = 3,
  68     MLME_STA_DISASSOC   = 4
  69 };
  70
  71 /* ATMEL_WPA_IOCTL_PARAM ioctl() cmd: */
  72 enum {
  73             ATMEL_PARAM_WPA = 1,
  74             ATMEL_PARAM_PRIVACY_INVOKED = 2,
  75             ATMEL_PARAM_WPA_TYPE = 3
  76 };
  77
  78 #define MAX_KEY_LENGTH      40
  79
  80 struct atmel_param{
  81     unsigned char sta_addr[6];
  82         int     cmd;
  83         u8      alg;
  84         u8      key_idx;
  85         u8      set_tx;
  86         u8      seq[8];
  87         u8      seq_len;
  88         u16     key_len;
  89         u8      key[MAX_KEY_LENGTH];
  90     struct{
  91         int     reason_code;
  92         u8      state;
  93     }mlme;
  94     u8          pairwise_suite;
  95     u8          group_suite;
  96     u8          key_mgmt_suite;
  97 };
  98
  99
 100
 101 static int atmel_ioctl(struct wpa_driver_atmel_data *drv,
 102                        struct atmel_param *param,
 103                        int len, int show_err)
 104 {
 105         struct iwreq iwr;
 106
 107         os_memset(&iwr, 0, sizeof(iwr));
 108         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 109         iwr.u.data.pointer = (caddr_t) param;
 110         iwr.u.data.length = len;
 111
 112         if (ioctl(drv->sock, ATMEL_WPA_IOCTL, &iwr) < 0) {
 113                 int ret;
 114                 ret = errno;
 115                 if (show_err)
 116                         perror("ioctl[ATMEL_WPA_IOCTL]");
 117                 return ret;
 118         }
 119
 120         return 0;
 121 }
 122
 123
 124 static int atmel2param(struct wpa_driver_atmel_data *drv, int param, int value)
 125 {
 126         struct iwreq iwr;
 127         int *i, ret = 0;
 128
 129         os_memset(&iwr, 0, sizeof(iwr));
 130         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 131         i = (int *) iwr.u.name;
 132         *i++ = param;
 133         *i++ = value;
 134
 135         if (ioctl(drv->sock, ATMEL_WPA_IOCTL_PARAM, &iwr) < 0) {
 136                 perror("ioctl[ATMEL_WPA_IOCTL_PARAM]");
 137                 ret = -1;
 138         }
 139         return ret;
 140 }
 141
 142
 143 #if 0
 144 static int wpa_driver_atmel_set_wpa_ie(struct wpa_driver_atmel_data *drv,
 145                                        const char *wpa_ie, size_t wpa_ie_len)
 146 {
 147         struct atmel_param *param;
 148         int res;
 149         size_t blen = ATMEL_GENERIC_ELEMENT_HDR_LEN + wpa_ie_len;
 150         if (blen < sizeof(*param))
 151                 blen = sizeof(*param);
 152
 153         param = os_zalloc(blen);
 154         if (param == NULL)
 155                 return -1;
 156
 157         param->cmd = ATMEL_SET_GENERIC_ELEMENT;
 158         param->u.generic_elem.len = wpa_ie_len;
 159         os_memcpy(param->u.generic_elem.data, wpa_ie, wpa_ie_len);
 160         res = atmel_ioctl(drv, param, blen, 1);
 161
 162         os_free(param);
 163
 164         return res;
 165 }
 166 #endif
 167
 168
 169 static int wpa_driver_atmel_set_wpa(void *priv, int enabled)
 170 {
 171         struct wpa_driver_atmel_data *drv = priv;
 172         int ret = 0;
 173
 174         printf("wpa_driver_atmel_set_wpa %s\n", drv->ifname);
 175
 176         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
 177
 178 #if 0
 179         if (!enabled && wpa_driver_atmel_set_wpa_ie(drv, NULL, 0) < 0)
 180                 ret = -1;
 181 #endif
 182         if (atmel2param(drv, ATMEL_PARAM_PRIVACY_INVOKED, enabled) < 0)
 183                 ret = -1;
 184         if (atmel2param(drv, ATMEL_PARAM_WPA, enabled) < 0)
 185                 ret = -1;
 186
 187         return ret;
 188 }
 189
 190
 191 static int wpa_driver_atmel_set_key(void *priv, wpa_alg alg,
 192                                     const u8 *addr, int key_idx,
 193                                     int set_tx, const u8 *seq, size_t seq_len,
 194                                     const u8 *key, size_t key_len)
 195 {
 196         struct wpa_driver_atmel_data *drv = priv;
 197         int ret = 0;
 198         struct atmel_param *param;
 199         u8 *buf;
 200         u8 alg_type;
 201
 202         size_t blen;
 203         char *alg_name;
 204
 205         switch (alg) {
 206         case WPA_ALG_NONE:
 207                 alg_name = "none";
 208                 alg_type = 0;
 209                 break;
 210         case WPA_ALG_WEP:
 211                 alg_name = "WEP";
 212                 alg_type = 1;
 213                 break;
 214         case WPA_ALG_TKIP:
 215                 alg_name = "TKIP";
 216                 alg_type = 2;
 217                 break;
 218         case WPA_ALG_CCMP:
 219                 alg_name = "CCMP";
 220                 alg_type = 3;
 221                 break;
 222         default:
 223                 return -1;
 224         }
 225
 226         wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
 227                    "key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
 228                    (unsigned long) seq_len, (unsigned long) key_len);
 229
 230         if (seq_len > 8)
 231                 return -2;
 232
 233         blen = sizeof(*param) + key_len;
 234         buf = os_zalloc(blen);
 235         if (buf == NULL)
 236                 return -1;
 237
 238         param = (struct atmel_param *) buf;
 239
 240         param->cmd = SET_WPA_ENCRYPTION;
 241
 242         if (addr == NULL)
 243                 os_memset(param->sta_addr, 0xff, ETH_ALEN);
 244         else
 245                 os_memcpy(param->sta_addr, addr, ETH_ALEN);
 246
 247         param->alg = alg_type;
 248         param->key_idx = key_idx;
 249         param->set_tx = set_tx;
 250         os_memcpy(param->seq, seq, seq_len);
 251         param->seq_len = seq_len;
 252         param->key_len = key_len;
 253         os_memcpy((u8 *)param->key, key, key_len);
 254
 255         if (atmel_ioctl(drv, param, blen, 1)) {
 256                 wpa_printf(MSG_WARNING, "Failed to set encryption.");
 257                 /* TODO: show key error*/
 258                 ret = -1;
 259         }
 260         os_free(buf);
 261
 262         return ret;
 263 }
 264
 265
 266 static int wpa_driver_atmel_set_countermeasures(void *priv,
 267                                                  int enabled)
 268 {
 269         /* FIX */
 270         printf("wpa_driver_atmel_set_countermeasures - not yet "
 271                "implemented\n");
 272         return 0;
 273 }
 274
 275
 276 static int wpa_driver_atmel_set_drop_unencrypted(void *priv,
 277                                                   int enabled)
 278 {
 279         /* FIX */
 280         printf("wpa_driver_atmel_set_drop_unencrypted - not yet "
 281                "implemented\n");
 282         return 0;
 283 }
 284
 285
 286 static int wpa_driver_atmel_mlme(void *priv, const u8 *addr, int cmd,
 287                                  int reason_code)
 288 {
 289         struct wpa_driver_atmel_data *drv = priv;
 290         struct atmel_param param;
 291         int ret;
 292         int mgmt_error = 0xaa;
 293
 294         os_memset(&param, 0, sizeof(param));
 295         os_memcpy(param.sta_addr, addr, ETH_ALEN);
 296         param.cmd = cmd;
 297         param.mlme.reason_code = reason_code;
 298         param.mlme.state = mgmt_error;
 299         ret = atmel_ioctl(drv, &param, sizeof(param), 1);
 300         return ret;
 301 }
 302
 303
 304 #if 0
 305 static int wpa_driver_atmel_set_suites(struct wpa_driver_atmel_data *drv,
 306                                        u8 pairwise_suite, u8 group_suite,
 307                                        u8 key_mgmt_suite)
 308 {
 309         struct atmel_param param;
 310         int ret;
 311
 312         os_memset(&param, 0, sizeof(param));
 313         param.cmd = SET_CIPHER_SUITES;
 314         param.pairwise_suite = pairwise_suite;
 315         param.group_suite = group_suite;
 316         param.key_mgmt_suite = key_mgmt_suite;
 317
 318         ret = atmel_ioctl(drv, &param, sizeof(param), 1);
 319         return ret;
 320 }
 321 #endif
 322
 323
 324 static int wpa_driver_atmel_deauthenticate(void *priv, const u8 *addr,
 325                                            int reason_code)
 326 {
 327         struct wpa_driver_atmel_data *drv = priv;
 328         printf("wpa_driver_atmel_deauthenticate\n");
 329         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
 330         return wpa_driver_atmel_mlme(drv, addr, MLME_STA_DEAUTH,
 331                                      reason_code);
 332
 333 }
 334
 335
 336 static int wpa_driver_atmel_disassociate(void *priv, const u8 *addr,
 337                                          int reason_code)
 338 {
 339         struct wpa_driver_atmel_data *drv = priv;
 340         printf("wpa_driver_atmel_disassociate\n");
 341         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
 342         return wpa_driver_atmel_mlme(drv, addr, MLME_STA_DISASSOC,
 343                                      reason_code);
 344
 345 }
 346
 347
 348 #if 0
 349 /* Atmel driver uses specific values for each cipher suite */
 350 static int convertSuiteToDriver(wpa_cipher suite)
 351 {
 352     u8 suite_type;
 353
 354     switch(suite) {
 355         case CIPHER_NONE:
 356                 suite_type =  0;
 357                 break;
 358         case CIPHER_WEP40:
 359                 suite_type =  1;
 360                 break;
 361         case CIPHER_TKIP:
 362                 suite_type = 2;
 363                 break;
 364         case CIPHER_WEP104:
 365                 suite_type = 5;
 366                 break;
 367         case CIPHER_CCMP:
 368                 suite_type = 3;
 369                 break;
 370         default:
 371                 suite_type = 2;
 372     }
 373
 374     return suite_type;
 375
 376 }
 377 #endif
 378
 379 static int
 380 wpa_driver_atmel_associate(void *priv,
 381                            struct wpa_driver_associate_params *params)
 382 {
 383         struct wpa_driver_atmel_data *drv = priv;
 384         int ret = 0;
 385 #if 0
 386         u8 pairwise_suite_driver;
 387         u8 group_suite_driver;
 388         u8 key_mgmt_suite_driver;
 389
 390         pairwise_suite_driver = convertSuiteToDriver(params->pairwise_suite);
 391         group_suite_driver    = convertSuiteToDriver(params->group_suite);
 392         key_mgmt_suite_driver = convertSuiteToDriver(params->key_mgmt_suite);
 393
 394         if (wpa_driver_atmel_set_suites(drv, pairwise_suite_driver,
 395                                         group_suite_driver,
 396                                         key_mgmt_suite_driver) < 0){
 397                 printf("wpa_driver_atmel_set_suites.\n");
 398                 ret = -1;
 399         }
 400         if (wpa_driver_wext_set_freq(drv->wext, params->freq) < 0) {
 401                 printf("wpa_driver_atmel_set_freq.\n");
 402                 ret = -1;
 403         }
 404 #endif
 405         if (wpa_driver_wext_set_ssid(drv->wext, params->ssid, params->ssid_len)
 406             < 0) {
 407                 printf("FAILED : wpa_driver_atmel_set_ssid.\n");
 408                 ret = -1;
 409         }
 410         if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0) {
 411                 printf("FAILED : wpa_driver_atmel_set_bssid.\n");
 412                 ret = -1;
 413         }
 414
 415         return ret;
 416 }
 417
 418
 419 static int wpa_driver_atmel_get_bssid(void *priv, u8 *bssid)
 420 {
 421         struct wpa_driver_atmel_data *drv = priv;
 422         return wpa_driver_wext_get_bssid(drv->wext, bssid);
 423 }
 424
 425
 426 static int wpa_driver_atmel_get_ssid(void *priv, u8 *ssid)
 427 {
 428         struct wpa_driver_atmel_data *drv = priv;
 429         return wpa_driver_wext_get_ssid(drv->wext, ssid);
 430 }
 431
 432
 433 static int wpa_driver_atmel_scan(void *priv, const u8 *ssid, size_t ssid_len)
 434 {
 435         struct wpa_driver_atmel_data *drv = priv;
 436         return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
 437 }
 438
 439
 440 static struct wpa_scan_results * wpa_driver_atmel_get_scan_results(void *priv)
 441 {
 442         struct wpa_driver_atmel_data *drv = priv;
 443         return wpa_driver_wext_get_scan_results(drv->wext);
 444 }
 445
 446
 447 static int wpa_driver_atmel_set_operstate(void *priv, int state)
 448 {
 449         struct wpa_driver_atmel_data *drv = priv;
 450         return wpa_driver_wext_set_operstate(drv->wext, state);
 451 }
 452
 453
 454 static void * wpa_driver_atmel_init(void *ctx, const char *ifname)
 455 {
 456         struct wpa_driver_atmel_data *drv;
 457
 458         drv = os_zalloc(sizeof(*drv));
 459         if (drv == NULL)
 460                 return NULL;
 461         drv->wext = wpa_driver_wext_init(ctx, ifname);
 462         if (drv->wext == NULL) {
 463                 os_free(drv);
 464                 return NULL;
 465         }
 466
 467         drv->ctx = ctx;
 468         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 469         drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
 470         if (drv->sock < 0) {
 471                 wpa_driver_wext_deinit(drv->wext);
 472                 os_free(drv);
 473                 return NULL;
 474         }
 475
 476         return drv;
 477 }
 478
 479
 480 static void wpa_driver_atmel_deinit(void *priv)
 481 {
 482         struct wpa_driver_atmel_data *drv = priv;
 483         wpa_driver_wext_deinit(drv->wext);
 484         close(drv->sock);
 485         os_free(drv);
 486 }
 487
 488
 489 const struct wpa_driver_ops wpa_driver_atmel_ops = {
 490         .name = "atmel",
 491         .desc = "ATMEL AT76C5XXx (USB, PCMCIA)",
 492         .get_bssid = wpa_driver_atmel_get_bssid,
 493         .get_ssid = wpa_driver_atmel_get_ssid,
 494         .set_wpa = wpa_driver_atmel_set_wpa,
 495         .set_key = wpa_driver_atmel_set_key,
 496         .init = wpa_driver_atmel_init,
 497         .deinit = wpa_driver_atmel_deinit,
 498         .set_countermeasures = wpa_driver_atmel_set_countermeasures,
 499         .set_drop_unencrypted = wpa_driver_atmel_set_drop_unencrypted,
 500         .scan = wpa_driver_atmel_scan,
 501         .get_scan_results2 = wpa_driver_atmel_get_scan_results,
 502         .deauthenticate = wpa_driver_atmel_deauthenticate,
 503         .disassociate = wpa_driver_atmel_disassociate,
 504         .associate = wpa_driver_atmel_associate,
 505         .set_operstate = wpa_driver_atmel_set_operstate,
 506 };