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(const char *ifname, void *priv,
 192                                     enum wpa_alg alg, const u8 *addr,
 193                                     int key_idx, int set_tx,
 194                                     const u8 *seq, size_t seq_len,
 195                                     const u8 *key, size_t key_len)
 196 {
 197         struct wpa_driver_atmel_data *drv = priv;
 198         int ret = 0;
 199         struct atmel_param *param;
 200         u8 *buf;
 201         u8 alg_type;
 202
 203         size_t blen;
 204         char *alg_name;
 205
 206         switch (alg) {
 207         case WPA_ALG_NONE:
 208                 alg_name = "none";
 209                 alg_type = 0;
 210                 break;
 211         case WPA_ALG_WEP:
 212                 alg_name = "WEP";
 213                 alg_type = 1;
 214                 break;
 215         case WPA_ALG_TKIP:
 216                 alg_name = "TKIP";
 217                 alg_type = 2;
 218                 break;
 219         case WPA_ALG_CCMP:
 220                 alg_name = "CCMP";
 221                 alg_type = 3;
 222                 break;
 223         default:
 224                 return -1;
 225         }
 226
 227         wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
 228                    "key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
 229                    (unsigned long) seq_len, (unsigned long) key_len);
 230
 231         if (seq_len > 8)
 232                 return -2;
 233
 234         blen = sizeof(*param) + key_len;
 235         buf = os_zalloc(blen);
 236         if (buf == NULL)
 237                 return -1;
 238
 239         param = (struct atmel_param *) buf;
 240
 241         param->cmd = SET_WPA_ENCRYPTION;
 242
 243         if (addr == NULL)
 244                 os_memset(param->sta_addr, 0xff, ETH_ALEN);
 245         else
 246                 os_memcpy(param->sta_addr, addr, ETH_ALEN);
 247
 248         param->alg = alg_type;
 249         param->key_idx = key_idx;
 250         param->set_tx = set_tx;
 251         if (seq)
 252                 os_memcpy(param->seq, seq, seq_len);
 253         param->seq_len = seq_len;
 254         param->key_len = key_len;
 255         os_memcpy((u8 *)param->key, key, key_len);
 256
 257         if (atmel_ioctl(drv, param, blen, 1)) {
 258                 wpa_printf(MSG_WARNING, "Failed to set encryption.");
 259                 /* TODO: show key error*/
 260                 ret = -1;
 261         }
 262         os_free(buf);
 263
 264         return ret;
 265 }
 266
 267
 268 static int wpa_driver_atmel_set_countermeasures(void *priv,
 269                                                  int enabled)
 270 {
 271         /* FIX */
 272         printf("wpa_driver_atmel_set_countermeasures - not yet "
 273                "implemented\n");
 274         return 0;
 275 }
 276
 277
 278 static int wpa_driver_atmel_mlme(void *priv, const u8 *addr, int cmd,
 279                                  int reason_code)
 280 {
 281         struct wpa_driver_atmel_data *drv = priv;
 282         struct atmel_param param;
 283         int ret;
 284         int mgmt_error = 0xaa;
 285
 286         os_memset(&param, 0, sizeof(param));
 287         os_memcpy(param.sta_addr, addr, ETH_ALEN);
 288         param.cmd = cmd;
 289         param.mlme.reason_code = reason_code;
 290         param.mlme.state = mgmt_error;
 291         ret = atmel_ioctl(drv, &param, sizeof(param), 1);
 292         return ret;
 293 }
 294
 295
 296 #if 0
 297 static int wpa_driver_atmel_set_suites(struct wpa_driver_atmel_data *drv,
 298                                        u8 pairwise_suite, u8 group_suite,
 299                                        u8 key_mgmt_suite)
 300 {
 301         struct atmel_param param;
 302         int ret;
 303
 304         os_memset(&param, 0, sizeof(param));
 305         param.cmd = SET_CIPHER_SUITES;
 306         param.pairwise_suite = pairwise_suite;
 307         param.group_suite = group_suite;
 308         param.key_mgmt_suite = key_mgmt_suite;
 309
 310         ret = atmel_ioctl(drv, &param, sizeof(param), 1);
 311         return ret;
 312 }
 313 #endif
 314
 315
 316 static int wpa_driver_atmel_deauthenticate(void *priv, const u8 *addr,
 317                                            int reason_code)
 318 {
 319         struct wpa_driver_atmel_data *drv = priv;
 320         printf("wpa_driver_atmel_deauthenticate\n");
 321         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
 322         return wpa_driver_atmel_mlme(drv, addr, MLME_STA_DEAUTH,
 323                                      reason_code);
 324
 325 }
 326
 327
 328 static int wpa_driver_atmel_disassociate(void *priv, const u8 *addr,
 329                                          int reason_code)
 330 {
 331         struct wpa_driver_atmel_data *drv = priv;
 332         printf("wpa_driver_atmel_disassociate\n");
 333         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
 334         return wpa_driver_atmel_mlme(drv, addr, MLME_STA_DISASSOC,
 335                                      reason_code);
 336
 337 }
 338
 339
 340 #if 0
 341 /* Atmel driver uses specific values for each cipher suite */
 342 static int convertSuiteToDriver(enum wpa_cipher suite)
 343 {
 344     u8 suite_type;
 345
 346     switch(suite) {
 347         case CIPHER_NONE:
 348                 suite_type =  0;
 349                 break;
 350         case CIPHER_WEP40:
 351                 suite_type =  1;
 352                 break;
 353         case CIPHER_TKIP:
 354                 suite_type = 2;
 355                 break;
 356         case CIPHER_WEP104:
 357                 suite_type = 5;
 358                 break;
 359         case CIPHER_CCMP:
 360                 suite_type = 3;
 361                 break;
 362         default:
 363                 suite_type = 2;
 364     }
 365
 366     return suite_type;
 367
 368 }
 369 #endif
 370
 371 static int
 372 wpa_driver_atmel_associate(void *priv,
 373                            struct wpa_driver_associate_params *params)
 374 {
 375         struct wpa_driver_atmel_data *drv = priv;
 376         int ret = 0;
 377 #if 0
 378         u8 pairwise_suite_driver;
 379         u8 group_suite_driver;
 380         u8 key_mgmt_suite_driver;
 381
 382         pairwise_suite_driver = convertSuiteToDriver(params->pairwise_suite);
 383         group_suite_driver    = convertSuiteToDriver(params->group_suite);
 384         key_mgmt_suite_driver = convertSuiteToDriver(params->key_mgmt_suite);
 385
 386         if (wpa_driver_atmel_set_suites(drv, pairwise_suite_driver,
 387                                         group_suite_driver,
 388                                         key_mgmt_suite_driver) < 0){
 389                 printf("wpa_driver_atmel_set_suites.\n");
 390                 ret = -1;
 391         }
 392         if (wpa_driver_wext_set_freq(drv->wext, params->freq) < 0) {
 393                 printf("wpa_driver_atmel_set_freq.\n");
 394                 ret = -1;
 395         }
 396 #endif
 397         if (wpa_driver_wext_set_ssid(drv->wext, params->ssid, params->ssid_len)
 398             < 0) {
 399                 printf("FAILED : wpa_driver_atmel_set_ssid.\n");
 400                 ret = -1;
 401         }
 402         if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0) {
 403                 printf("FAILED : wpa_driver_atmel_set_bssid.\n");
 404                 ret = -1;
 405         }
 406
 407         return ret;
 408 }
 409
 410
 411 static int wpa_driver_atmel_get_bssid(void *priv, u8 *bssid)
 412 {
 413         struct wpa_driver_atmel_data *drv = priv;
 414         return wpa_driver_wext_get_bssid(drv->wext, bssid);
 415 }
 416
 417
 418 static int wpa_driver_atmel_get_ssid(void *priv, u8 *ssid)
 419 {
 420         struct wpa_driver_atmel_data *drv = priv;
 421         return wpa_driver_wext_get_ssid(drv->wext, ssid);
 422 }
 423
 424
 425 static int wpa_driver_atmel_scan(void *priv,
 426                                  struct wpa_driver_scan_params *params)
 427 {
 428         struct wpa_driver_atmel_data *drv = priv;
 429         return wpa_driver_wext_scan(drv->wext, params);
 430 }
 431
 432
 433 static struct wpa_scan_results * wpa_driver_atmel_get_scan_results(void *priv)
 434 {
 435         struct wpa_driver_atmel_data *drv = priv;
 436         return wpa_driver_wext_get_scan_results(drv->wext);
 437 }
 438
 439
 440 static int wpa_driver_atmel_set_operstate(void *priv, int state)
 441 {
 442         struct wpa_driver_atmel_data *drv = priv;
 443         return wpa_driver_wext_set_operstate(drv->wext, state);
 444 }
 445
 446
 447 static void * wpa_driver_atmel_init(void *ctx, const char *ifname)
 448 {
 449         struct wpa_driver_atmel_data *drv;
 450
 451         drv = os_zalloc(sizeof(*drv));
 452         if (drv == NULL)
 453                 return NULL;
 454         drv->wext = wpa_driver_wext_init(ctx, ifname);
 455         if (drv->wext == NULL) {
 456                 os_free(drv);
 457                 return NULL;
 458         }
 459
 460         drv->ctx = ctx;
 461         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 462         drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
 463         if (drv->sock < 0) {
 464                 wpa_driver_wext_deinit(drv->wext);
 465                 os_free(drv);
 466                 return NULL;
 467         }
 468
 469         wpa_driver_atmel_set_wpa(drv, 1);
 470
 471         return drv;
 472 }
 473
 474
 475 static void wpa_driver_atmel_deinit(void *priv)
 476 {
 477         struct wpa_driver_atmel_data *drv = priv;
 478         wpa_driver_atmel_set_wpa(drv, 0);
 479         wpa_driver_wext_deinit(drv->wext);
 480         close(drv->sock);
 481         os_free(drv);
 482 }
 483
 484
 485 const struct wpa_driver_ops wpa_driver_atmel_ops = {
 486         .name = "atmel",
 487         .desc = "ATMEL AT76C5XXx (USB, PCMCIA)",
 488         .get_bssid = wpa_driver_atmel_get_bssid,
 489         .get_ssid = wpa_driver_atmel_get_ssid,
 490         .set_key = wpa_driver_atmel_set_key,
 491         .init = wpa_driver_atmel_init,
 492         .deinit = wpa_driver_atmel_deinit,
 493         .set_countermeasures = wpa_driver_atmel_set_countermeasures,
 494         .scan2 = wpa_driver_atmel_scan,
 495         .get_scan_results2 = wpa_driver_atmel_get_scan_results,
 496         .deauthenticate = wpa_driver_atmel_deauthenticate,
 497         .disassociate = wpa_driver_atmel_disassociate,
 498         .associate = wpa_driver_atmel_associate,
 499         .set_operstate = wpa_driver_atmel_set_operstate,
 500 };