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 wpa_driver_ipw_set_auth_alg(void *priv, int auth_alg);
  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_strlcpy(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(const char *ifname, void *priv,
 219                                   enum wpa_alg alg, const u8 *addr,
 220                                   int key_idx, int set_tx,
 221                                   const u8 *seq, size_t seq_len,
 222                                   const u8 *key, size_t key_len)
 223 {
 224         struct wpa_driver_ipw_data *drv = priv;
 225         struct ipw_param *param;
 226         u8 *buf;
 227         size_t blen;
 228         int ret = 0;
 229         char *alg_name;
 230
 231         switch (alg) {
 232         case WPA_ALG_NONE:
 233                 alg_name = "none";
 234                 break;
 235         case WPA_ALG_WEP:
 236                 alg_name = "WEP";
 237                 break;
 238         case WPA_ALG_TKIP:
 239                 alg_name = "TKIP";
 240                 break;
 241         case WPA_ALG_CCMP:
 242                 alg_name = "CCMP";
 243                 break;
 244         default:
 245                 return -1;
 246         }
 247
 248         wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
 249                    "key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
 250                    (unsigned long) seq_len, (unsigned long) key_len);
 251
 252         if (seq_len > 8)
 253                 return -2;
 254
 255         blen = sizeof(*param) + key_len;
 256         buf = os_zalloc(blen);
 257         if (buf == NULL)
 258                 return -1;
 259
 260         param = (struct ipw_param *) buf;
 261         param->cmd = IPW_CMD_SET_ENCRYPTION;
 262         os_memset(param->sta_addr, 0xff, ETH_ALEN);
 263         os_strlcpy((char *) param->u.crypt.alg, alg_name,
 264                    IPW_CRYPT_ALG_NAME_LEN);
 265         param->u.crypt.set_tx = set_tx ? 1 : 0;
 266         param->u.crypt.idx = key_idx;
 267         os_memcpy(param->u.crypt.seq, seq, seq_len);
 268         param->u.crypt.key_len = key_len;
 269         os_memcpy((u8 *) (param + 1), key, key_len);
 270
 271         if (ipw_ioctl(drv, param, blen, 1)) {
 272                 wpa_printf(MSG_WARNING, "Failed to set encryption.");
 273                 ipw_show_set_key_error(param);
 274                 ret = -1;
 275         }
 276         os_free(buf);
 277
 278         return ret;
 279 }
 280
 281
 282 static int wpa_driver_ipw_set_countermeasures(void *priv, int enabled)
 283 {
 284         struct wpa_driver_ipw_data *drv = priv;
 285         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
 286         return ipw_set_wpa_param(drv, IPW_PARAM_TKIP_COUNTERMEASURES,
 287                                      enabled);
 288
 289 }
 290
 291
 292 static int wpa_driver_ipw_set_drop_unencrypted(void *priv, int enabled)
 293 {
 294         struct wpa_driver_ipw_data *drv = priv;
 295         wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
 296         return ipw_set_wpa_param(drv, IPW_PARAM_DROP_UNENCRYPTED,
 297                                      enabled);
 298 }
 299
 300
 301 static int wpa_driver_ipw_deauthenticate(void *priv, const u8 *addr,
 302                                          int reason_code)
 303 {
 304         struct wpa_driver_ipw_data *drv = priv;
 305         return ipw_mlme(drv, addr, IPW_MLME_STA_DEAUTH, reason_code);
 306 }
 307
 308
 309 static int wpa_driver_ipw_disassociate(void *priv, const u8 *addr,
 310                                        int reason_code)
 311 {
 312         struct wpa_driver_ipw_data *drv = priv;
 313         return ipw_mlme(drv, addr, IPW_MLME_STA_DISASSOC, reason_code);
 314 }
 315
 316
 317 static int
 318 wpa_driver_ipw_associate(void *priv, struct wpa_driver_associate_params *params)
 319 {
 320         struct wpa_driver_ipw_data *drv = priv;
 321         int ret = 0;
 322         int unencrypted_eapol;
 323
 324         if (wpa_driver_ipw_set_auth_alg(drv, params->auth_alg) < 0)
 325                 ret = -1;
 326         if (wpa_driver_ipw_set_drop_unencrypted(drv, params->drop_unencrypted)
 327             < 0)
 328                 ret = -1;
 329         if (ipw_set_wpa_ie(drv, params->wpa_ie, params->wpa_ie_len) < 0)
 330                 ret = -1;
 331         if (wpa_driver_wext_set_ssid(drv->wext, params->ssid,
 332                                      params->ssid_len) < 0)
 333                 ret = -1;
 334         if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0)
 335                 ret = -1;
 336
 337         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
 338             params->key_mgmt_suite == KEY_MGMT_PSK)
 339                 unencrypted_eapol = 0;
 340         else
 341                 unencrypted_eapol = 1;
 342
 343         if (ipw_set_wpa_param(drv, IPW_PARAM_IEEE_802_1X,
 344                               unencrypted_eapol) < 0) {
 345                 wpa_printf(MSG_DEBUG, "ipw: Failed to configure "
 346                            "ieee_802_1x param");
 347         }
 348
 349         return ret;
 350 }
 351
 352
 353 static int wpa_driver_ipw_set_auth_alg(void *priv, int auth_alg)
 354 {
 355         struct wpa_driver_ipw_data *drv = priv;
 356         int algs = 0;
 357
 358         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
 359                 algs |= 1;
 360         if (auth_alg & AUTH_ALG_SHARED_KEY)
 361                 algs |= 2;
 362         if (auth_alg & AUTH_ALG_LEAP)
 363                 algs |= 4;
 364         if (algs == 0)
 365                 algs = 1; /* at least one algorithm should be set */
 366
 367         wpa_printf(MSG_DEBUG, "%s: auth_alg=0x%x", __FUNCTION__, algs);
 368         return ipw_set_wpa_param(drv, IPW_PARAM_AUTH_ALGS, algs);
 369 }
 370
 371
 372 static int wpa_driver_ipw_get_bssid(void *priv, u8 *bssid)
 373 {
 374         struct wpa_driver_ipw_data *drv = priv;
 375         return wpa_driver_wext_get_bssid(drv->wext, bssid);
 376 }
 377
 378
 379 static int wpa_driver_ipw_get_ssid(void *priv, u8 *ssid)
 380 {
 381         struct wpa_driver_ipw_data *drv = priv;
 382         return wpa_driver_wext_get_ssid(drv->wext, ssid);
 383 }
 384
 385
 386 static int wpa_driver_ipw_scan(void *priv,
 387                                struct wpa_driver_scan_params *params)
 388 {
 389         struct wpa_driver_ipw_data *drv = priv;
 390         return wpa_driver_wext_scan(drv->wext, params);
 391 }
 392
 393
 394 static struct wpa_scan_results * wpa_driver_ipw_get_scan_results(void *priv)
 395 {
 396         struct wpa_driver_ipw_data *drv = priv;
 397         return wpa_driver_wext_get_scan_results(drv->wext);
 398 }
 399
 400
 401 static int wpa_driver_ipw_set_operstate(void *priv, int state)
 402 {
 403         struct wpa_driver_ipw_data *drv = priv;
 404         return wpa_driver_wext_set_operstate(drv->wext, state);
 405 }
 406
 407
 408 static void * wpa_driver_ipw_init(void *ctx, const char *ifname)
 409 {
 410         struct wpa_driver_ipw_data *drv;
 411         int ver;
 412
 413         wpa_printf(MSG_DEBUG, "%s is called", __FUNCTION__);
 414         drv = os_zalloc(sizeof(*drv));
 415         if (drv == NULL)
 416                 return NULL;
 417         drv->wext = wpa_driver_wext_init(ctx, ifname);
 418         if (drv->wext == NULL) {
 419                 os_free(drv);
 420                 return NULL;
 421         }
 422
 423         ver = wpa_driver_wext_get_version(drv->wext);
 424         if (ver >= 18) {
 425                 wpa_printf(MSG_WARNING, "Linux wireless extensions version %d "
 426                            "detected.", ver);
 427                 wpa_printf(MSG_WARNING, "ipw2x00 driver uses driver_wext "
 428                            "(-Dwext) instead of driver_ipw.");
 429         }
 430
 431         drv->ctx = ctx;
 432         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 433         drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
 434         if (drv->sock < 0) {
 435                 wpa_driver_wext_deinit(drv->wext);
 436                 os_free(drv);
 437                 return NULL;
 438         }
 439
 440         wpa_driver_ipw_set_wpa(drv, 1);
 441
 442         return drv;
 443 }
 444
 445
 446 static void wpa_driver_ipw_deinit(void *priv)
 447 {
 448         struct wpa_driver_ipw_data *drv = priv;
 449         wpa_driver_ipw_set_wpa(drv, 0);
 450         wpa_driver_wext_deinit(drv->wext);
 451         close(drv->sock);
 452         os_free(drv);
 453 }
 454
 455
 456 const struct wpa_driver_ops wpa_driver_ipw_ops = {
 457         .name = "ipw",
 458         .desc = "Intel ipw2100/2200 driver (old; use wext with Linux 2.6.13 "
 459         "or newer)",
 460         .get_bssid = wpa_driver_ipw_get_bssid,
 461         .get_ssid = wpa_driver_ipw_get_ssid,
 462         .set_key = wpa_driver_ipw_set_key,
 463         .set_countermeasures = wpa_driver_ipw_set_countermeasures,
 464         .scan2 = wpa_driver_ipw_scan,
 465         .get_scan_results2 = wpa_driver_ipw_get_scan_results,
 466         .deauthenticate = wpa_driver_ipw_deauthenticate,
 467         .disassociate = wpa_driver_ipw_disassociate,
 468         .associate = wpa_driver_ipw_associate,
 469         .init = wpa_driver_ipw_init,
 470         .deinit = wpa_driver_ipw_deinit,
 471         .set_operstate = wpa_driver_ipw_set_operstate,
 472 };