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 "l2_packet.h"
  28 #include "driver_wext.h"
  29 #include "wpa_supplicant.h"
  30
  31 struct wpa_driver_ipw_data {
  32         void *wext; /* private data for driver_wext */
  33         void *ctx;
  34         char ifname[IFNAMSIZ + 1];
  35         int sock;
  36 };
  37
  38 /* following definitions must be kept in sync with ipw2100.c and ipw2200.c */
  39
  40 #define IPW_IOCTL_WPA_SUPPLICANT                SIOCIWFIRSTPRIV+30
  41
  42 #define IPW_CMD_SET_WPA_PARAM                   1
  43 #define IPW_CMD_SET_WPA_IE                      2
  44 #define IPW_CMD_SET_ENCRYPTION                  3
  45 #define IPW_CMD_MLME                            4
  46
  47 #define IPW_PARAM_WPA_ENABLED                   1
  48 #define IPW_PARAM_TKIP_COUNTERMEASURES          2
  49 #define IPW_PARAM_DROP_UNENCRYPTED              3
  50 #define IPW_PARAM_PRIVACY_INVOKED               4
  51 #define IPW_PARAM_AUTH_ALGS                     5
  52 #define IPW_PARAM_IEEE_802_1X                   6
  53
  54 #define IPW_MLME_STA_DEAUTH                     1
  55 #define IPW_MLME_STA_DISASSOC                   2
  56
  57 #define IPW_CRYPT_ERR_UNKNOWN_ALG               2
  58 #define IPW_CRYPT_ERR_UNKNOWN_ADDR              3
  59 #define IPW_CRYPT_ERR_CRYPT_INIT_FAILED         4
  60 #define IPW_CRYPT_ERR_KEY_SET_FAILED            5
  61 #define IPW_CRYPT_ERR_TX_KEY_SET_FAILED         6
  62 #define IPW_CRYPT_ERR_CARD_CONF_FAILED          7
  63
  64 #define IPW_CRYPT_ALG_NAME_LEN                  16
  65
  66 struct ipw_param {
  67         u32 cmd;
  68         u8 sta_addr[ETH_ALEN];
  69         union {
  70                 struct {
  71                         u8 name;
  72                         u32 value;
  73                 } wpa_param;
  74                 struct {
  75                         u32 len;
  76                         u8 reserved[32];
  77                         u8 data[0];
  78                 } wpa_ie;
  79                 struct{
  80                         u32 command;
  81                         u32 reason_code;
  82                 } mlme;
  83                 struct {
  84                         u8 alg[IPW_CRYPT_ALG_NAME_LEN];
  85                         u8 set_tx;
  86                         u32 err;
  87                         u8 idx;
  88                         u8 seq[8];
  89                         u16 key_len;
  90                         u8 key[0];
  91                 } crypt;
  92
  93         } u;
  94 };
  95
  96 /* end of ipw2100.c and ipw2200.c code */
  97
  98 static int ipw_ioctl(struct wpa_driver_ipw_data *drv,
  99                      struct ipw_param *param, int len, int show_err)
 100 {
 101         struct iwreq iwr;
 102
 103         os_memset(&iwr, 0, sizeof(iwr));
 104         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 105         iwr.u.data.pointer = (caddr_t) param;
 106         iwr.u.data.length = len;
 107
 108         if (ioctl(drv->sock, IPW_IOCTL_WPA_SUPPLICANT, &iwr) < 0) {
 109                 int ret = errno;
 110                 if (show_err)
 111                         perror("ioctl[IPW_IOCTL_WPA_SUPPLICANT]");
 112                 return ret;
 113         }
 114
 115         return 0;
 116 }
 117
 118
 119 static void ipw_show_set_key_error(struct ipw_param *param)
 120 {
 121         switch (param->u.crypt.err) {
 122         case IPW_CRYPT_ERR_UNKNOWN_ALG:
 123                 wpa_printf(MSG_INFO, "Unknown algorithm '%s'.",
 124                            param->u.crypt.alg);
 125                 wpa_printf(MSG_INFO, "You may need to load kernel module to "
 126                            "register that algorithm.");
 127                 wpa_printf(MSG_INFO, "E.g., 'modprobe ieee80211_crypt_wep' for"
 128                            " WEP.");
 129                 break;
 130         case IPW_CRYPT_ERR_UNKNOWN_ADDR:
 131                 wpa_printf(MSG_INFO, "Unknown address " MACSTR ".",
 132                            MAC2STR(param->sta_addr));
 133                 break;
 134         case IPW_CRYPT_ERR_CRYPT_INIT_FAILED:
 135                 wpa_printf(MSG_INFO, "Crypt algorithm initialization failed.");
 136                 break;
 137         case IPW_CRYPT_ERR_KEY_SET_FAILED:
 138                 wpa_printf(MSG_INFO, "Key setting failed.");
 139                 break;
 140         case IPW_CRYPT_ERR_TX_KEY_SET_FAILED:
 141                 wpa_printf(MSG_INFO, "TX key index setting failed.");
 142                 break;
 143         case IPW_CRYPT_ERR_CARD_CONF_FAILED:
 144                 wpa_printf(MSG_INFO, "Card configuration failed.");
 145                 break;
 146         }
 147 }
 148
 149
 150 static int ipw_set_wpa_ie(struct wpa_driver_ipw_data *drv,
 151                           const u8 *wpa_ie, size_t wpa_ie_len)
 152 {
 153         struct ipw_param *param;
 154         int ret;
 155         size_t blen = sizeof(*param) + wpa_ie_len;
 156
 157         param = os_zalloc(blen);
 158         if (param == NULL)
 159                 return -1;
 160
 161         param->cmd = IPW_CMD_SET_WPA_IE;
 162         param->u.wpa_ie.len = wpa_ie_len;
 163         os_memcpy(param->u.wpa_ie.data, wpa_ie, wpa_ie_len);
 164
 165         ret = ipw_ioctl(drv, param, blen, 1);
 166
 167         os_free(param);
 168         return ret;
 169 }
 170
 171
 172 static int ipw_set_wpa_param(struct wpa_driver_ipw_data *drv, u8 name,
 173                              u32 value)
 174 {
 175         struct ipw_param param;
 176
 177         os_memset(&param, 0, sizeof(param));
 178         param.cmd = IPW_CMD_SET_WPA_PARAM;
 179         param.u.wpa_param.name = name;
 180         param.u.wpa_param.value = value;
 181
 182         return ipw_ioctl(drv, &param, sizeof(param), 1);
 183 }
 184
 185
 186 static int ipw_mlme(struct wpa_driver_ipw_data *drv, const u8 *addr,
 187                     int cmd, int reason)
 188 {
 189         struct ipw_param param;
 190
 191         os_memset(&param, 0, sizeof(param));
 192         os_memcpy(param.sta_addr, addr, ETH_ALEN);
 193         param.cmd = IPW_CMD_MLME;
 194         param.u.mlme.command = cmd;
 195         param.u.mlme.reason_code = reason;
 196
 197         return ipw_ioctl(drv, &param, sizeof(param), 1);
 198 }
 199
 200
 201 static int wpa_driver_ipw_set_wpa(void *priv, int enabled)
 202 {
 203         struct wpa_driver_ipw_data *drv = priv;
 204         int ret = 0;
 205
 206         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
 207
 208         if (!enabled && ipw_set_wpa_ie(drv, NULL, 0) < 0)
 209                 ret = -1;
 210
 211         if (ipw_set_wpa_param(drv, IPW_PARAM_WPA_ENABLED, enabled) < 0)
 212                 ret = -1;
 213
 214         return ret;
 215 }
 216
 217
 218 static int wpa_driver_ipw_set_key(void *priv, wpa_alg alg,
 219                                       const u8 *addr, int key_idx, int set_tx,
 220                                       const u8 *seq, size_t seq_len,
 221                                       const u8 *key, size_t key_len)
 222 {
 223         struct wpa_driver_ipw_data *drv = priv;
 224         struct ipw_param *param;
 225         u8 *buf;
 226         size_t blen;
 227         int ret = 0;
 228         char *alg_name;
 229
 230         switch (alg) {
 231         case WPA_ALG_NONE:
 232                 alg_name = "none";
 233                 break;
 234         case WPA_ALG_WEP:
 235                 alg_name = "WEP";
 236                 break;
 237         case WPA_ALG_TKIP:
 238                 alg_name = "TKIP";
 239                 break;
 240         case WPA_ALG_CCMP:
 241                 alg_name = "CCMP";
 242                 break;
 243         default:
 244                 return -1;
 245         }
 246
 247         wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
 248                    "key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
 249                    (unsigned long) seq_len, (unsigned long) key_len);
 250
 251         if (seq_len > 8)
 252                 return -2;
 253
 254         blen = sizeof(*param) + key_len;
 255         buf = os_zalloc(blen);
 256         if (buf == NULL)
 257                 return -1;
 258
 259         param = (struct ipw_param *) buf;
 260         param->cmd = IPW_CMD_SET_ENCRYPTION;
 261         os_memset(param->sta_addr, 0xff, ETH_ALEN);
 262         os_strncpy((char *) param->u.crypt.alg, alg_name,
 263                    IPW_CRYPT_ALG_NAME_LEN);
 264         param->u.crypt.set_tx = set_tx ? 1 : 0;
 265         param->u.crypt.idx = key_idx;
 266         os_memcpy(param->u.crypt.seq, seq, seq_len);
 267         param->u.crypt.key_len = key_len;
 268         os_memcpy((u8 *) (param + 1), key, key_len);
 269
 270         if (ipw_ioctl(drv, param, blen, 1)) {
 271                 wpa_printf(MSG_WARNING, "Failed to set encryption.");
 272                 ipw_show_set_key_error(param);
 273                 ret = -1;
 274         }
 275         os_free(buf);
 276
 277         return ret;
 278 }
 279
 280
 281 static int wpa_driver_ipw_set_countermeasures(void *priv, int enabled)
 282 {
 283         struct wpa_driver_ipw_data *drv = priv;
 284         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
 285         return ipw_set_wpa_param(drv, IPW_PARAM_TKIP_COUNTERMEASURES,
 286                                      enabled);
 287
 288 }
 289
 290
 291 static int wpa_driver_ipw_set_drop_unencrypted(void *priv, int enabled)
 292 {
 293         struct wpa_driver_ipw_data *drv = priv;
 294         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
 295         return ipw_set_wpa_param(drv, IPW_PARAM_DROP_UNENCRYPTED,
 296                                      enabled);
 297 }
 298
 299
 300 static int wpa_driver_ipw_deauthenticate(void *priv, const u8 *addr,
 301                                          int reason_code)
 302 {
 303         struct wpa_driver_ipw_data *drv = priv;
 304         return ipw_mlme(drv, addr, IPW_MLME_STA_DEAUTH, reason_code);
 305 }
 306
 307
 308 static int wpa_driver_ipw_disassociate(void *priv, const u8 *addr,
 309                                        int reason_code)
 310 {
 311         struct wpa_driver_ipw_data *drv = priv;
 312         return ipw_mlme(drv, addr, IPW_MLME_STA_DISASSOC, reason_code);
 313 }
 314
 315
 316 static int
 317 wpa_driver_ipw_associate(void *priv, struct wpa_driver_associate_params *params)
 318 {
 319         struct wpa_driver_ipw_data *drv = priv;
 320         int ret = 0;
 321         int unencrypted_eapol;
 322
 323         if (ipw_set_wpa_ie(drv, params->wpa_ie, params->wpa_ie_len) < 0)
 324                 ret = -1;
 325         if (wpa_driver_wext_set_ssid(drv->wext, params->ssid,
 326                                      params->ssid_len) < 0)
 327                 ret = -1;
 328         if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0)
 329                 ret = -1;
 330
 331         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
 332             params->key_mgmt_suite == KEY_MGMT_PSK)
 333                 unencrypted_eapol = 0;
 334         else
 335                 unencrypted_eapol = 1;
 336
 337         if (ipw_set_wpa_param(drv, IPW_PARAM_IEEE_802_1X,
 338                               unencrypted_eapol) < 0) {
 339                 wpa_printf(MSG_DEBUG, "ipw: Failed to configure "
 340                            "ieee_802_1x param");
 341         }
 342
 343         return ret;
 344 }
 345
 346
 347 static int wpa_driver_ipw_set_auth_alg(void *priv, int auth_alg)
 348 {
 349         struct wpa_driver_ipw_data *drv = priv;
 350         int algs = 0;
 351
 352         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
 353                 algs |= 1;
 354         if (auth_alg & AUTH_ALG_SHARED_KEY)
 355                 algs |= 2;
 356         if (auth_alg & AUTH_ALG_LEAP)
 357                 algs |= 4;
 358         if (algs == 0)
 359                 algs = 1; /* at least one algorithm should be set */
 360
 361         wpa_printf(MSG_DEBUG, "%s: auth_alg=0x%x", __FUNCTION__, algs);
 362         return ipw_set_wpa_param(drv, IPW_PARAM_AUTH_ALGS, algs);
 363 }
 364
 365
 366 static int wpa_driver_ipw_get_bssid(void *priv, u8 *bssid)
 367 {
 368         struct wpa_driver_ipw_data *drv = priv;
 369         return wpa_driver_wext_get_bssid(drv->wext, bssid);
 370 }
 371
 372
 373 static int wpa_driver_ipw_get_ssid(void *priv, u8 *ssid)
 374 {
 375         struct wpa_driver_ipw_data *drv = priv;
 376         return wpa_driver_wext_get_ssid(drv->wext, ssid);
 377 }
 378
 379
 380 static int wpa_driver_ipw_scan(void *priv, const u8 *ssid, size_t ssid_len)
 381 {
 382         struct wpa_driver_ipw_data *drv = priv;
 383         return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
 384 }
 385
 386
 387 static int wpa_driver_ipw_get_scan_results(void *priv,
 388                                             struct wpa_scan_result *results,
 389                                             size_t max_size)
 390 {
 391         struct wpa_driver_ipw_data *drv = priv;
 392         return wpa_driver_wext_get_scan_results(drv->wext, results, max_size);
 393 }
 394
 395
 396 static int wpa_driver_ipw_set_operstate(void *priv, int state)
 397 {
 398         struct wpa_driver_ipw_data *drv = priv;
 399         return wpa_driver_wext_set_operstate(drv->wext, state);
 400 }
 401
 402
 403 static void * wpa_driver_ipw_init(void *ctx, const char *ifname)
 404 {
 405         struct wpa_driver_ipw_data *drv;
 406         int ver;
 407
 408         wpa_printf(MSG_DEBUG, "%s is called", __FUNCTION__);
 409         drv = os_zalloc(sizeof(*drv));
 410         if (drv == NULL)
 411                 return NULL;
 412         drv->wext = wpa_driver_wext_init(ctx, ifname);
 413         if (drv->wext == NULL) {
 414                 os_free(drv);
 415                 return NULL;
 416         }
 417
 418         ver = wpa_driver_wext_get_version(drv->wext);
 419         if (ver >= 18) {
 420                 wpa_printf(MSG_WARNING, "Linux wireless extensions version %d "
 421                            "detected.", ver);
 422                 wpa_printf(MSG_WARNING, "ipw2x00 driver uses driver_wext "
 423                            "(-Dwext) instead of driver_ipw.");
 424         }
 425
 426         drv->ctx = ctx;
 427         os_strncpy(drv->ifname, ifname, sizeof(drv->ifname));
 428         drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
 429         if (drv->sock < 0) {
 430                 wpa_driver_wext_deinit(drv->wext);
 431                 os_free(drv);
 432                 return NULL;
 433         }
 434
 435         return drv;
 436 }
 437
 438
 439 static void wpa_driver_ipw_deinit(void *priv)
 440 {
 441         struct wpa_driver_ipw_data *drv = priv;
 442         wpa_driver_wext_deinit(drv->wext);
 443         close(drv->sock);
 444         os_free(drv);
 445 }
 446
 447
 448 const struct wpa_driver_ops wpa_driver_ipw_ops = {
 449         .name = "ipw",
 450         .desc = "Intel ipw2100/2200 driver (old; use wext with Linux 2.6.13 "
 451         "or newer)",
 452         .get_bssid = wpa_driver_ipw_get_bssid,
 453         .get_ssid = wpa_driver_ipw_get_ssid,
 454         .set_wpa = wpa_driver_ipw_set_wpa,
 455         .set_key = wpa_driver_ipw_set_key,
 456         .set_countermeasures = wpa_driver_ipw_set_countermeasures,
 457         .set_drop_unencrypted = wpa_driver_ipw_set_drop_unencrypted,
 458         .scan = wpa_driver_ipw_scan,
 459         .get_scan_results = wpa_driver_ipw_get_scan_results,
 460         .deauthenticate = wpa_driver_ipw_deauthenticate,
 461         .disassociate = wpa_driver_ipw_disassociate,
 462         .associate = wpa_driver_ipw_associate,
 463         .set_auth_alg = wpa_driver_ipw_set_auth_alg,
 464         .init = wpa_driver_ipw_init,
 465         .deinit = wpa_driver_ipw_deinit,
 466         .set_operstate = wpa_driver_ipw_set_operstate,
 467 };