dist/wpa/src/drivers/driver_ipw.c

   1 /*
   2  * WPA Supplicant - driver interaction with Linux ipw2100/2200 drivers
   3  * Copyright (c) 2005 Zhu Yi <yi.zhu@intel.com>
   4  * Copyright (c) 2004 Lubomir Gelo <lgelo@cnc.sk>
   5  * Copyright (c) 2003-2004, Jouni Malinen <j@w1.fi>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Alternatively, this software may be distributed under the terms of BSD
  12  * license.
  13  *
  14  * See README and COPYING for more details.
  15  *
  16  * Please note that ipw2100/2200 drivers change to use generic Linux wireless
  17  * extensions if the kernel includes support for WE-18 or newer (Linux 2.6.13
  18  * or newer). driver_wext.c should be used in those cases.
  19  */
  20
  21 #include "includes.h"
  22 #include <sys/ioctl.h>
  23
  24 #include "wireless_copy.h"
  25 #include "common.h"
  26 #include "driver.h"
  27 #include "driver_wext.h"
  28
  29 struct wpa_driver_ipw_data {
  30         void *wext; /* private data for driver_wext */
  31         void *ctx;
  32         char ifname[IFNAMSIZ + 1];
  33         int sock;
  34 };
  35
  36 /* following definitions must be kept in sync with ipw2100.c and ipw2200.c */
  37
  38 #define IPW_IOCTL_WPA_SUPPLICANT                SIOCIWFIRSTPRIV+30
  39
  40 #define IPW_CMD_SET_WPA_PARAM                   1
  41 #define IPW_CMD_SET_WPA_IE                      2
  42 #define IPW_CMD_SET_ENCRYPTION                  3
  43 #define IPW_CMD_MLME                            4
  44
  45 #define IPW_PARAM_WPA_ENABLED                   1
  46 #define IPW_PARAM_TKIP_COUNTERMEASURES          2
  47 #define IPW_PARAM_DROP_UNENCRYPTED              3
  48 #define IPW_PARAM_PRIVACY_INVOKED               4
  49 #define IPW_PARAM_AUTH_ALGS                     5
  50 #define IPW_PARAM_IEEE_802_1X                   6
  51
  52 #define IPW_MLME_STA_DEAUTH                     1
  53 #define IPW_MLME_STA_DISASSOC                   2
  54
  55 #define IPW_CRYPT_ERR_UNKNOWN_ALG               2
  56 #define IPW_CRYPT_ERR_UNKNOWN_ADDR              3
  57 #define IPW_CRYPT_ERR_CRYPT_INIT_FAILED         4
  58 #define IPW_CRYPT_ERR_KEY_SET_FAILED            5
  59 #define IPW_CRYPT_ERR_TX_KEY_SET_FAILED         6
  60 #define IPW_CRYPT_ERR_CARD_CONF_FAILED          7
  61
  62 #define IPW_CRYPT_ALG_NAME_LEN                  16
  63
  64 struct ipw_param {
  65         u32 cmd;
  66         u8 sta_addr[ETH_ALEN];
  67         union {
  68                 struct {
  69                         u8 name;
  70                         u32 value;
  71                 } wpa_param;
  72                 struct {
  73                         u32 len;
  74                         u8 reserved[32];
  75                         u8 data[0];
  76                 } wpa_ie;
  77                 struct{
  78                         u32 command;
  79                         u32 reason_code;
  80                 } mlme;
  81                 struct {
  82                         u8 alg[IPW_CRYPT_ALG_NAME_LEN];
  83                         u8 set_tx;
  84                         u32 err;
  85                         u8 idx;
  86                         u8 seq[8];
  87                         u16 key_len;
  88                         u8 key[0];
  89                 } crypt;
  90
  91         } u;
  92 };
  93
  94 /* end of ipw2100.c and ipw2200.c code */
  95
  96 static int ipw_ioctl(struct wpa_driver_ipw_data *drv,
  97                      struct ipw_param *param, int len, int show_err)
  98 {
  99         struct iwreq iwr;
 100
 101         os_memset(&iwr, 0, sizeof(iwr));
 102         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 103         iwr.u.data.pointer = (caddr_t) param;
 104         iwr.u.data.length = len;
 105
 106         if (ioctl(drv->sock, IPW_IOCTL_WPA_SUPPLICANT, &iwr) < 0) {
 107                 int ret = errno;
 108                 if (show_err)
 109                         perror("ioctl[IPW_IOCTL_WPA_SUPPLICANT]");
 110                 return ret;
 111         }
 112
 113         return 0;
 114 }
 115
 116
 117 static void ipw_show_set_key_error(struct ipw_param *param)
 118 {
 119         switch (param->u.crypt.err) {
 120         case IPW_CRYPT_ERR_UNKNOWN_ALG:
 121                 wpa_printf(MSG_INFO, "Unknown algorithm '%s'.",
 122                            param->u.crypt.alg);
 123                 wpa_printf(MSG_INFO, "You may need to load kernel module to "
 124                            "register that algorithm.");
 125                 wpa_printf(MSG_INFO, "E.g., 'modprobe ieee80211_crypt_wep' for"
 126                            " WEP.");
 127                 break;
 128         case IPW_CRYPT_ERR_UNKNOWN_ADDR:
 129                 wpa_printf(MSG_INFO, "Unknown address " MACSTR ".",
 130                            MAC2STR(param->sta_addr));
 131                 break;
 132         case IPW_CRYPT_ERR_CRYPT_INIT_FAILED:
 133                 wpa_printf(MSG_INFO, "Crypt algorithm initialization failed.");
 134                 break;
 135         case IPW_CRYPT_ERR_KEY_SET_FAILED:
 136                 wpa_printf(MSG_INFO, "Key setting failed.");
 137                 break;
 138         case IPW_CRYPT_ERR_TX_KEY_SET_FAILED:
 139                 wpa_printf(MSG_INFO, "TX key index setting failed.");
 140                 break;
 141         case IPW_CRYPT_ERR_CARD_CONF_FAILED:
 142                 wpa_printf(MSG_INFO, "Card configuration failed.");
 143                 break;
 144         }
 145 }
 146
 147
 148 static int ipw_set_wpa_ie(struct wpa_driver_ipw_data *drv,
 149                           const u8 *wpa_ie, size_t wpa_ie_len)
 150 {
 151         struct ipw_param *param;
 152         int ret;
 153         size_t blen = sizeof(*param) + wpa_ie_len;
 154
 155         param = os_zalloc(blen);
 156         if (param == NULL)
 157                 return -1;
 158
 159         param->cmd = IPW_CMD_SET_WPA_IE;
 160         param->u.wpa_ie.len = wpa_ie_len;
 161         os_memcpy(param->u.wpa_ie.data, wpa_ie, wpa_ie_len);
 162
 163         ret = ipw_ioctl(drv, param, blen, 1);
 164
 165         os_free(param);
 166         return ret;
 167 }
 168
 169
 170 static int ipw_set_wpa_param(struct wpa_driver_ipw_data *drv, u8 name,
 171                              u32 value)
 172 {
 173         struct ipw_param param;
 174
 175         os_memset(&param, 0, sizeof(param));
 176         param.cmd = IPW_CMD_SET_WPA_PARAM;
 177         param.u.wpa_param.name = name;
 178         param.u.wpa_param.value = value;
 179
 180         return ipw_ioctl(drv, &param, sizeof(param), 1);
 181 }
 182
 183
 184 static int ipw_mlme(struct wpa_driver_ipw_data *drv, const u8 *addr,
 185                     int cmd, int reason)
 186 {
 187         struct ipw_param param;
 188
 189         os_memset(&param, 0, sizeof(param));
 190         os_memcpy(param.sta_addr, addr, ETH_ALEN);
 191         param.cmd = IPW_CMD_MLME;
 192         param.u.mlme.command = cmd;
 193         param.u.mlme.reason_code = reason;
 194
 195         return ipw_ioctl(drv, &param, sizeof(param), 1);
 196 }
 197
 198
 199 static int wpa_driver_ipw_set_wpa(void *priv, int enabled)
 200 {
 201         struct wpa_driver_ipw_data *drv = priv;
 202         int ret = 0;
 203
 204         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
 205
 206         if (!enabled && ipw_set_wpa_ie(drv, NULL, 0) < 0)
 207                 ret = -1;
 208
 209         if (ipw_set_wpa_param(drv, IPW_PARAM_WPA_ENABLED, enabled) < 0)
 210                 ret = -1;
 211
 212         return ret;
 213 }
 214
 215
 216 static int wpa_driver_ipw_set_key(void *priv, wpa_alg alg,
 217                                       const u8 *addr, int key_idx, int set_tx,
 218                                       const u8 *seq, size_t seq_len,
 219                                       const u8 *key, size_t key_len)
 220 {
 221         struct wpa_driver_ipw_data *drv = priv;
 222         struct ipw_param *param;
 223         u8 *buf;
 224         size_t blen;
 225         int ret = 0;
 226         char *alg_name;
 227
 228         switch (alg) {
 229         case WPA_ALG_NONE:
 230                 alg_name = "none";
 231                 break;
 232         case WPA_ALG_WEP:
 233                 alg_name = "WEP";
 234                 break;
 235         case WPA_ALG_TKIP:
 236                 alg_name = "TKIP";
 237                 break;
 238         case WPA_ALG_CCMP:
 239                 alg_name = "CCMP";
 240                 break;
 241         default:
 242                 return -1;
 243         }
 244
 245         wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
 246                    "key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
 247                    (unsigned long) seq_len, (unsigned long) key_len);
 248
 249         if (seq_len > 8)
 250                 return -2;
 251
 252         blen = sizeof(*param) + key_len;
 253         buf = os_zalloc(blen);
 254         if (buf == NULL)
 255                 return -1;
 256
 257         param = (struct ipw_param *) buf;
 258         param->cmd = IPW_CMD_SET_ENCRYPTION;
 259         os_memset(param->sta_addr, 0xff, ETH_ALEN);
 260         os_strlcpy((char *) param->u.crypt.alg, alg_name,
 261                    IPW_CRYPT_ALG_NAME_LEN);
 262         param->u.crypt.set_tx = set_tx ? 1 : 0;
 263         param->u.crypt.idx = key_idx;
 264         os_memcpy(param->u.crypt.seq, seq, seq_len);
 265         param->u.crypt.key_len = key_len;
 266         os_memcpy((u8 *) (param + 1), key, key_len);
 267
 268         if (ipw_ioctl(drv, param, blen, 1)) {
 269                 wpa_printf(MSG_WARNING, "Failed to set encryption.");
 270                 ipw_show_set_key_error(param);
 271                 ret = -1;
 272         }
 273         os_free(buf);
 274
 275         return ret;
 276 }
 277
 278
 279 static int wpa_driver_ipw_set_countermeasures(void *priv, int enabled)
 280 {
 281         struct wpa_driver_ipw_data *drv = priv;
 282         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
 283         return ipw_set_wpa_param(drv, IPW_PARAM_TKIP_COUNTERMEASURES,
 284                                      enabled);
 285
 286 }
 287
 288
 289 static int wpa_driver_ipw_set_drop_unencrypted(void *priv, int enabled)
 290 {
 291         struct wpa_driver_ipw_data *drv = priv;
 292         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
 293         return ipw_set_wpa_param(drv, IPW_PARAM_DROP_UNENCRYPTED,
 294                                      enabled);
 295 }
 296
 297
 298 static int wpa_driver_ipw_deauthenticate(void *priv, const u8 *addr,
 299                                          int reason_code)
 300 {
 301         struct wpa_driver_ipw_data *drv = priv;
 302         return ipw_mlme(drv, addr, IPW_MLME_STA_DEAUTH, reason_code);
 303 }
 304
 305
 306 static int wpa_driver_ipw_disassociate(void *priv, const u8 *addr,
 307                                        int reason_code)
 308 {
 309         struct wpa_driver_ipw_data *drv = priv;
 310         return ipw_mlme(drv, addr, IPW_MLME_STA_DISASSOC, reason_code);
 311 }
 312
 313
 314 static int
 315 wpa_driver_ipw_associate(void *priv, struct wpa_driver_associate_params *params)
 316 {
 317         struct wpa_driver_ipw_data *drv = priv;
 318         int ret = 0;
 319         int unencrypted_eapol;
 320
 321         if (ipw_set_wpa_ie(drv, params->wpa_ie, params->wpa_ie_len) < 0)
 322                 ret = -1;
 323         if (wpa_driver_wext_set_ssid(drv->wext, params->ssid,
 324                                      params->ssid_len) < 0)
 325                 ret = -1;
 326         if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0)
 327                 ret = -1;
 328
 329         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
 330             params->key_mgmt_suite == KEY_MGMT_PSK)
 331                 unencrypted_eapol = 0;
 332         else
 333                 unencrypted_eapol = 1;
 334
 335         if (ipw_set_wpa_param(drv, IPW_PARAM_IEEE_802_1X,
 336                               unencrypted_eapol) < 0) {
 337                 wpa_printf(MSG_DEBUG, "ipw: Failed to configure "
 338                            "ieee_802_1x param");
 339         }
 340
 341         return ret;
 342 }
 343
 344
 345 static int wpa_driver_ipw_set_auth_alg(void *priv, int auth_alg)
 346 {
 347         struct wpa_driver_ipw_data *drv = priv;
 348         int algs = 0;
 349
 350         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
 351                 algs |= 1;
 352         if (auth_alg & AUTH_ALG_SHARED_KEY)
 353                 algs |= 2;
 354         if (auth_alg & AUTH_ALG_LEAP)
 355                 algs |= 4;
 356         if (algs == 0)
 357                 algs = 1; /* at least one algorithm should be set */
 358
 359         wpa_printf(MSG_DEBUG, "%s: auth_alg=0x%x", __FUNCTION__, algs);
 360         return ipw_set_wpa_param(drv, IPW_PARAM_AUTH_ALGS, algs);
 361 }
 362
 363
 364 static int wpa_driver_ipw_get_bssid(void *priv, u8 *bssid)
 365 {
 366         struct wpa_driver_ipw_data *drv = priv;
 367         return wpa_driver_wext_get_bssid(drv->wext, bssid);
 368 }
 369
 370
 371 static int wpa_driver_ipw_get_ssid(void *priv, u8 *ssid)
 372 {
 373         struct wpa_driver_ipw_data *drv = priv;
 374         return wpa_driver_wext_get_ssid(drv->wext, ssid);
 375 }
 376
 377
 378 static int wpa_driver_ipw_scan(void *priv, const u8 *ssid, size_t ssid_len)
 379 {
 380         struct wpa_driver_ipw_data *drv = priv;
 381         return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
 382 }
 383
 384
 385 static struct wpa_scan_results * wpa_driver_ipw_get_scan_results(void *priv)
 386 {
 387         struct wpa_driver_ipw_data *drv = priv;
 388         return wpa_driver_wext_get_scan_results(drv->wext);
 389 }
 390
 391
 392 static int wpa_driver_ipw_set_operstate(void *priv, int state)
 393 {
 394         struct wpa_driver_ipw_data *drv = priv;
 395         return wpa_driver_wext_set_operstate(drv->wext, state);
 396 }
 397
 398
 399 static void * wpa_driver_ipw_init(void *ctx, const char *ifname)
 400 {
 401         struct wpa_driver_ipw_data *drv;
 402         int ver;
 403
 404         wpa_printf(MSG_DEBUG, "%s is called", __FUNCTION__);
 405         drv = os_zalloc(sizeof(*drv));
 406         if (drv == NULL)
 407                 return NULL;
 408         drv->wext = wpa_driver_wext_init(ctx, ifname);
 409         if (drv->wext == NULL) {
 410                 os_free(drv);
 411                 return NULL;
 412         }
 413
 414         ver = wpa_driver_wext_get_version(drv->wext);
 415         if (ver >= 18) {
 416                 wpa_printf(MSG_WARNING, "Linux wireless extensions version %d "
 417                            "detected.", ver);
 418                 wpa_printf(MSG_WARNING, "ipw2x00 driver uses driver_wext "
 419                            "(-Dwext) instead of driver_ipw.");
 420         }
 421
 422         drv->ctx = ctx;
 423         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 424         drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
 425         if (drv->sock < 0) {
 426                 wpa_driver_wext_deinit(drv->wext);
 427                 os_free(drv);
 428                 return NULL;
 429         }
 430
 431         return drv;
 432 }
 433
 434
 435 static void wpa_driver_ipw_deinit(void *priv)
 436 {
 437         struct wpa_driver_ipw_data *drv = priv;
 438         wpa_driver_wext_deinit(drv->wext);
 439         close(drv->sock);
 440         os_free(drv);
 441 }
 442
 443
 444 const struct wpa_driver_ops wpa_driver_ipw_ops = {
 445         .name = "ipw",
 446         .desc = "Intel ipw2100/2200 driver (old; use wext with Linux 2.6.13 "
 447         "or newer)",
 448         .get_bssid = wpa_driver_ipw_get_bssid,
 449         .get_ssid = wpa_driver_ipw_get_ssid,
 450         .set_wpa = wpa_driver_ipw_set_wpa,
 451         .set_key = wpa_driver_ipw_set_key,
 452         .set_countermeasures = wpa_driver_ipw_set_countermeasures,
 453         .set_drop_unencrypted = wpa_driver_ipw_set_drop_unencrypted,
 454         .scan = wpa_driver_ipw_scan,
 455         .get_scan_results2 = wpa_driver_ipw_get_scan_results,
 456         .deauthenticate = wpa_driver_ipw_deauthenticate,
 457         .disassociate = wpa_driver_ipw_disassociate,
 458         .associate = wpa_driver_ipw_associate,
 459         .set_auth_alg = wpa_driver_ipw_set_auth_alg,
 460         .init = wpa_driver_ipw_init,
 461         .deinit = wpa_driver_ipw_deinit,
 462         .set_operstate = wpa_driver_ipw_set_operstate,
 463 };