1 /* 2 * WPA Supplicant - driver interaction with Linux ipw2100/2200 drivers 3 * Copyright (c) 2005 Zhu Yi <yi.zhu (at) intel.com> 4 * Copyright (c) 2004 Lubomir Gelo <lgelo (at) cnc.sk> 5 * Copyright (c) 2003-2004, Jouni Malinen <j (at) 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(¶m, 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, ¶m, 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(¶m, 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, ¶m, 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 }; 464
