src/drivers/driver_wext.c

   1 /*
   2  * Driver interaction with generic Linux Wireless Extensions
   3  * Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  *
   8  * This file implements a driver interface for the Linux Wireless Extensions.
   9  * When used with WE-18 or newer, this interface can be used as-is with number
  10  * of drivers. In addition to this, some of the common functions in this file
  11  * can be used by other driver interface implementations that use generic WE
  12  * ioctls, but require private ioctls for some of the functionality.
  13  */
  14
  15 #include "includes.h"
  16 #include <sys/ioctl.h>
  17 #include <sys/types.h>
  18 #include <sys/stat.h>
  19 #include <fcntl.h>
  20 #include <net/if_arp.h>
  21
  22 #include "linux_wext.h"
  23 #include "common.h"
  24 #include "eloop.h"
  25 #include "common/ieee802_11_defs.h"
  26 #include "common/wpa_common.h"
  27 #include "priv_netlink.h"
  28 #include "netlink.h"
  29 #include "linux_ioctl.h"
  30 #include "rfkill.h"
  31 #include "driver.h"
  32 #include "driver_wext.h"
  33
  34 static int wpa_driver_wext_flush_pmkid(void *priv);
  35 static int wpa_driver_wext_get_range(void *priv);
  36 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
  37 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv);
  38 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg);
  39
  40
  41 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
  42                                    int idx, u32 value)
  43 {
  44         struct iwreq iwr;
  45         int ret = 0;
  46
  47         os_memset(&iwr, 0, sizeof(iwr));
  48         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
  49         iwr.u.param.flags = idx & IW_AUTH_INDEX;
  50         iwr.u.param.value = value;
  51
  52         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
  53                 if (errno != EOPNOTSUPP) {
  54                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
  55                                    "value 0x%x) failed: %s)",
  56                                    idx, value, strerror(errno));
  57                 }
  58                 ret = errno == EOPNOTSUPP ? -2 : -1;
  59         }
  60
  61         return ret;
  62 }
  63
  64
  65 /**
  66  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
  67  * @priv: Pointer to private wext data from wpa_driver_wext_init()
  68  * @bssid: Buffer for BSSID
  69  * Returns: 0 on success, -1 on failure
  70  */
  71 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
  72 {
  73         struct wpa_driver_wext_data *drv = priv;
  74         struct iwreq iwr;
  75         int ret = 0;
  76
  77         os_memset(&iwr, 0, sizeof(iwr));
  78         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
  79
  80         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
  81                 perror("ioctl[SIOCGIWAP]");
  82                 ret = -1;
  83         }
  84         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
  85
  86         return ret;
  87 }
  88
  89
  90 /**
  91  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
  92  * @priv: Pointer to private wext data from wpa_driver_wext_init()
  93  * @bssid: BSSID
  94  * Returns: 0 on success, -1 on failure
  95  */
  96 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
  97 {
  98         struct wpa_driver_wext_data *drv = priv;
  99         struct iwreq iwr;
 100         int ret = 0;
 101
 102         os_memset(&iwr, 0, sizeof(iwr));
 103         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 104         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 105         if (bssid)
 106                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 107         else
 108                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 109
 110         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 111                 perror("ioctl[SIOCSIWAP]");
 112                 ret = -1;
 113         }
 114
 115         return ret;
 116 }
 117
 118
 119 /**
 120  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 121  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 122  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 123  * Returns: SSID length on success, -1 on failure
 124  */
 125 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 126 {
 127         struct wpa_driver_wext_data *drv = priv;
 128         struct iwreq iwr;
 129         int ret = 0;
 130
 131         os_memset(&iwr, 0, sizeof(iwr));
 132         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 133         iwr.u.essid.pointer = (caddr_t) ssid;
 134         iwr.u.essid.length = 32;
 135
 136         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 137                 perror("ioctl[SIOCGIWESSID]");
 138                 ret = -1;
 139         } else {
 140                 ret = iwr.u.essid.length;
 141                 if (ret > 32)
 142                         ret = 32;
 143                 /* Some drivers include nul termination in the SSID, so let's
 144                  * remove it here before further processing. WE-21 changes this
 145                  * to explicitly require the length _not_ to include nul
 146                  * termination. */
 147                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 148                     drv->we_version_compiled < 21)
 149                         ret--;
 150         }
 151
 152         return ret;
 153 }
 154
 155
 156 /**
 157  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 158  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 159  * @ssid: SSID
 160  * @ssid_len: Length of SSID (0..32)
 161  * Returns: 0 on success, -1 on failure
 162  */
 163 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 164 {
 165         struct wpa_driver_wext_data *drv = priv;
 166         struct iwreq iwr;
 167         int ret = 0;
 168         char buf[33];
 169
 170         if (ssid_len > 32)
 171                 return -1;
 172
 173         os_memset(&iwr, 0, sizeof(iwr));
 174         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 175         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 176         iwr.u.essid.flags = (ssid_len != 0);
 177         os_memset(buf, 0, sizeof(buf));
 178         os_memcpy(buf, ssid, ssid_len);
 179         iwr.u.essid.pointer = (caddr_t) buf;
 180         if (drv->we_version_compiled < 21) {
 181                 /* For historic reasons, set SSID length to include one extra
 182                  * character, C string nul termination, even though SSID is
 183                  * really an octet string that should not be presented as a C
 184                  * string. Some Linux drivers decrement the length by one and
 185                  * can thus end up missing the last octet of the SSID if the
 186                  * length is not incremented here. WE-21 changes this to
 187                  * explicitly require the length _not_ to include nul
 188                  * termination. */
 189                 if (ssid_len)
 190                         ssid_len++;
 191         }
 192         iwr.u.essid.length = ssid_len;
 193
 194         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 195                 perror("ioctl[SIOCSIWESSID]");
 196                 ret = -1;
 197         }
 198
 199         return ret;
 200 }
 201
 202
 203 /**
 204  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 205  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 206  * @freq: Frequency in MHz
 207  * Returns: 0 on success, -1 on failure
 208  */
 209 int wpa_driver_wext_set_freq(void *priv, int freq)
 210 {
 211         struct wpa_driver_wext_data *drv = priv;
 212         struct iwreq iwr;
 213         int ret = 0;
 214
 215         os_memset(&iwr, 0, sizeof(iwr));
 216         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 217         iwr.u.freq.m = freq * 100000;
 218         iwr.u.freq.e = 1;
 219
 220         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 221                 perror("ioctl[SIOCSIWFREQ]");
 222                 ret = -1;
 223         }
 224
 225         return ret;
 226 }
 227
 228
 229 static void
 230 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 231 {
 232         union wpa_event_data data;
 233
 234         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 235                    custom);
 236
 237         os_memset(&data, 0, sizeof(data));
 238         /* Host AP driver */
 239         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 240                 data.michael_mic_failure.unicast =
 241                         os_strstr(custom, " unicast ") != NULL;
 242                 /* TODO: parse parameters(?) */
 243                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 244         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 245                 char *spos;
 246                 int bytes;
 247                 u8 *req_ies = NULL, *resp_ies = NULL;
 248
 249                 spos = custom + 17;
 250
 251                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 252                 if (!bytes || (bytes & 1))
 253                         return;
 254                 bytes /= 2;
 255
 256                 req_ies = os_malloc(bytes);
 257                 if (req_ies == NULL ||
 258                     hexstr2bin(spos, req_ies, bytes) < 0)
 259                         goto done;
 260                 data.assoc_info.req_ies = req_ies;
 261                 data.assoc_info.req_ies_len = bytes;
 262
 263                 spos += bytes * 2;
 264
 265                 data.assoc_info.resp_ies = NULL;
 266                 data.assoc_info.resp_ies_len = 0;
 267
 268                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 269                         spos += 9;
 270
 271                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 272                         if (!bytes || (bytes & 1))
 273                                 goto done;
 274                         bytes /= 2;
 275
 276                         resp_ies = os_malloc(bytes);
 277                         if (resp_ies == NULL ||
 278                             hexstr2bin(spos, resp_ies, bytes) < 0)
 279                                 goto done;
 280                         data.assoc_info.resp_ies = resp_ies;
 281                         data.assoc_info.resp_ies_len = bytes;
 282                 }
 283
 284                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 285
 286         done:
 287                 os_free(resp_ies);
 288                 os_free(req_ies);
 289 #ifdef CONFIG_PEERKEY
 290         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 291                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 292                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 293                                    "STKSTART.request '%s'", custom + 17);
 294                         return;
 295                 }
 296                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 297 #endif /* CONFIG_PEERKEY */
 298         }
 299 }
 300
 301
 302 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 303         void *ctx, const char *ev, size_t len)
 304 {
 305         const struct iw_michaelmicfailure *mic;
 306         union wpa_event_data data;
 307
 308         if (len < sizeof(*mic))
 309                 return -1;
 310
 311         mic = (const struct iw_michaelmicfailure *) ev;
 312
 313         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 314                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 315                    MAC2STR(mic->src_addr.sa_data));
 316
 317         os_memset(&data, 0, sizeof(data));
 318         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 319         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 320
 321         return 0;
 322 }
 323
 324
 325 static int wpa_driver_wext_event_wireless_pmkidcand(
 326         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 327 {
 328         const struct iw_pmkid_cand *cand;
 329         union wpa_event_data data;
 330         const u8 *addr;
 331
 332         if (len < sizeof(*cand))
 333                 return -1;
 334
 335         cand = (const struct iw_pmkid_cand *) ev;
 336         addr = (const u8 *) cand->bssid.sa_data;
 337
 338         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 339                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 340                    cand->index, MAC2STR(addr));
 341
 342         os_memset(&data, 0, sizeof(data));
 343         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 344         data.pmkid_candidate.index = cand->index;
 345         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 346         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 347
 348         return 0;
 349 }
 350
 351
 352 static int wpa_driver_wext_event_wireless_assocreqie(
 353         struct wpa_driver_wext_data *drv, const char *ev, int len)
 354 {
 355         if (len < 0)
 356                 return -1;
 357
 358         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 359                     len);
 360         os_free(drv->assoc_req_ies);
 361         drv->assoc_req_ies = os_malloc(len);
 362         if (drv->assoc_req_ies == NULL) {
 363                 drv->assoc_req_ies_len = 0;
 364                 return -1;
 365         }
 366         os_memcpy(drv->assoc_req_ies, ev, len);
 367         drv->assoc_req_ies_len = len;
 368
 369         return 0;
 370 }
 371
 372
 373 static int wpa_driver_wext_event_wireless_assocrespie(
 374         struct wpa_driver_wext_data *drv, const char *ev, int len)
 375 {
 376         if (len < 0)
 377                 return -1;
 378
 379         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 380                     len);
 381         os_free(drv->assoc_resp_ies);
 382         drv->assoc_resp_ies = os_malloc(len);
 383         if (drv->assoc_resp_ies == NULL) {
 384                 drv->assoc_resp_ies_len = 0;
 385                 return -1;
 386         }
 387         os_memcpy(drv->assoc_resp_ies, ev, len);
 388         drv->assoc_resp_ies_len = len;
 389
 390         return 0;
 391 }
 392
 393
 394 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 395 {
 396         union wpa_event_data data;
 397
 398         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 399                 return;
 400
 401         os_memset(&data, 0, sizeof(data));
 402         if (drv->assoc_req_ies) {
 403                 data.assoc_info.req_ies = drv->assoc_req_ies;
 404                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 405         }
 406         if (drv->assoc_resp_ies) {
 407                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 408                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 409         }
 410
 411         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 412
 413         os_free(drv->assoc_req_ies);
 414         drv->assoc_req_ies = NULL;
 415         os_free(drv->assoc_resp_ies);
 416         drv->assoc_resp_ies = NULL;
 417 }
 418
 419
 420 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 421                                            char *data, int len)
 422 {
 423         struct iw_event iwe_buf, *iwe = &iwe_buf;
 424         char *pos, *end, *custom, *buf;
 425
 426         pos = data;
 427         end = data + len;
 428
 429         while (pos + IW_EV_LCP_LEN <= end) {
 430                 /* Event data may be unaligned, so make a local, aligned copy
 431                  * before processing. */
 432                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 433                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 434                            iwe->cmd, iwe->len);
 435                 if (iwe->len <= IW_EV_LCP_LEN)
 436                         return;
 437
 438                 custom = pos + IW_EV_POINT_LEN;
 439                 if (drv->we_version_compiled > 18 &&
 440                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 441                      iwe->cmd == IWEVCUSTOM ||
 442                      iwe->cmd == IWEVASSOCREQIE ||
 443                      iwe->cmd == IWEVASSOCRESPIE ||
 444                      iwe->cmd == IWEVPMKIDCAND)) {
 445                         /* WE-19 removed the pointer from struct iw_point */
 446                         char *dpos = (char *) &iwe_buf.u.data.length;
 447                         int dlen = dpos - (char *) &iwe_buf;
 448                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 449                                   sizeof(struct iw_event) - dlen);
 450                 } else {
 451                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 452                         custom += IW_EV_POINT_OFF;
 453                 }
 454
 455                 switch (iwe->cmd) {
 456                 case SIOCGIWAP:
 457                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 458                                    MACSTR,
 459                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 460                         if (is_zero_ether_addr(
 461                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 462                             os_memcmp(iwe->u.ap_addr.sa_data,
 463                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 464                             0) {
 465                                 os_free(drv->assoc_req_ies);
 466                                 drv->assoc_req_ies = NULL;
 467                                 os_free(drv->assoc_resp_ies);
 468                                 drv->assoc_resp_ies = NULL;
 469                                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC,
 470                                                      NULL);
 471
 472                         } else {
 473                                 wpa_driver_wext_event_assoc_ies(drv);
 474                                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC,
 475                                                      NULL);
 476                         }
 477                         break;
 478                 case IWEVMICHAELMICFAILURE:
 479                         if (custom + iwe->u.data.length > end) {
 480                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 481                                            "IWEVMICHAELMICFAILURE length");
 482                                 return;
 483                         }
 484                         wpa_driver_wext_event_wireless_michaelmicfailure(
 485                                 drv->ctx, custom, iwe->u.data.length);
 486                         break;
 487                 case IWEVCUSTOM:
 488                         if (custom + iwe->u.data.length > end) {
 489                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 490                                            "IWEVCUSTOM length");
 491                                 return;
 492                         }
 493                         buf = dup_binstr(custom, iwe->u.data.length);
 494                         if (buf == NULL)
 495                                 return;
 496                         wpa_driver_wext_event_wireless_custom(drv->ctx, buf);
 497                         os_free(buf);
 498                         break;
 499                 case SIOCGIWSCAN:
 500                         drv->scan_complete_events = 1;
 501                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 502                                              drv, drv->ctx);
 503                         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS,
 504                                              NULL);
 505                         break;
 506                 case IWEVASSOCREQIE:
 507                         if (custom + iwe->u.data.length > end) {
 508                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 509                                            "IWEVASSOCREQIE length");
 510                                 return;
 511                         }
 512                         wpa_driver_wext_event_wireless_assocreqie(
 513                                 drv, custom, iwe->u.data.length);
 514                         break;
 515                 case IWEVASSOCRESPIE:
 516                         if (custom + iwe->u.data.length > end) {
 517                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 518                                            "IWEVASSOCRESPIE length");
 519                                 return;
 520                         }
 521                         wpa_driver_wext_event_wireless_assocrespie(
 522                                 drv, custom, iwe->u.data.length);
 523                         break;
 524                 case IWEVPMKIDCAND:
 525                         if (custom + iwe->u.data.length > end) {
 526                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 527                                            "IWEVPMKIDCAND length");
 528                                 return;
 529                         }
 530                         wpa_driver_wext_event_wireless_pmkidcand(
 531                                 drv, custom, iwe->u.data.length);
 532                         break;
 533                 }
 534
 535                 pos += iwe->len;
 536         }
 537 }
 538
 539
 540 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 541                                        char *buf, size_t len, int del)
 542 {
 543         union wpa_event_data event;
 544
 545         os_memset(&event, 0, sizeof(event));
 546         if (len > sizeof(event.interface_status.ifname))
 547                 len = sizeof(event.interface_status.ifname) - 1;
 548         os_memcpy(event.interface_status.ifname, buf, len);
 549         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 550                 EVENT_INTERFACE_ADDED;
 551
 552         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 553                    del ? "DEL" : "NEW",
 554                    event.interface_status.ifname,
 555                    del ? "removed" : "added");
 556
 557         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 558                 if (del) {
 559                         if (drv->if_removed) {
 560                                 wpa_printf(MSG_DEBUG, "WEXT: if_removed "
 561                                            "already set - ignore event");
 562                                 return;
 563                         }
 564                         drv->if_removed = 1;
 565                 } else {
 566                         if (if_nametoindex(drv->ifname) == 0) {
 567                                 wpa_printf(MSG_DEBUG, "WEXT: Interface %s "
 568                                            "does not exist - ignore "
 569                                            "RTM_NEWLINK",
 570                                            drv->ifname);
 571                                 return;
 572                         }
 573                         if (!drv->if_removed) {
 574                                 wpa_printf(MSG_DEBUG, "WEXT: if_removed "
 575                                            "already cleared - ignore event");
 576                                 return;
 577                         }
 578                         drv->if_removed = 0;
 579                 }
 580         }
 581
 582         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 583 }
 584
 585
 586 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 587                                       u8 *buf, size_t len)
 588 {
 589         int attrlen, rta_len;
 590         struct rtattr *attr;
 591
 592         attrlen = len;
 593         attr = (struct rtattr *) buf;
 594
 595         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 596         while (RTA_OK(attr, attrlen)) {
 597                 if (attr->rta_type == IFLA_IFNAME) {
 598                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 599                             == 0)
 600                                 return 1;
 601                         else
 602                                 break;
 603                 }
 604                 attr = RTA_NEXT(attr, attrlen);
 605         }
 606
 607         return 0;
 608 }
 609
 610
 611 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 612                                        int ifindex, u8 *buf, size_t len)
 613 {
 614         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 615                 return 1;
 616
 617         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, buf, len)) {
 618                 drv->ifindex = if_nametoindex(drv->ifname);
 619                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 620                            "interface");
 621                 wpa_driver_wext_finish_drv_init(drv);
 622                 return 1;
 623         }
 624
 625         return 0;
 626 }
 627
 628
 629 static void wpa_driver_wext_event_rtm_newlink(void *ctx, struct ifinfomsg *ifi,
 630                                               u8 *buf, size_t len)
 631 {
 632         struct wpa_driver_wext_data *drv = ctx;
 633         int attrlen, rta_len;
 634         struct rtattr *attr;
 635         char namebuf[IFNAMSIZ];
 636
 637         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 638                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 639                            ifi->ifi_index);
 640                 return;
 641         }
 642
 643         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 644                    "(%s%s%s%s)",
 645                    drv->operstate, ifi->ifi_flags,
 646                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 647                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 648                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 649                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 650
 651         if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
 652                 wpa_printf(MSG_DEBUG, "WEXT: Interface down");
 653                 drv->if_disabled = 1;
 654                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
 655         }
 656
 657         if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
 658                 if (if_indextoname(ifi->ifi_index, namebuf) &&
 659                     linux_iface_up(drv->ioctl_sock, drv->ifname) == 0) {
 660                         wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
 661                                    "event since interface %s is down",
 662                                    namebuf);
 663                 } else if (if_nametoindex(drv->ifname) == 0) {
 664                         wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
 665                                    "event since interface %s does not exist",
 666                                    drv->ifname);
 667                 } else if (drv->if_removed) {
 668                         wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
 669                                    "event since interface %s is marked "
 670                                    "removed", drv->ifname);
 671                 } else {
 672                         wpa_printf(MSG_DEBUG, "WEXT: Interface up");
 673                         drv->if_disabled = 0;
 674                         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED,
 675                                              NULL);
 676                 }
 677         }
 678
 679         /*
 680          * Some drivers send the association event before the operup event--in
 681          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 682          * fails. This will hit us when wpa_supplicant does not need to do
 683          * IEEE 802.1X authentication
 684          */
 685         if (drv->operstate == 1 &&
 686             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 687             !(ifi->ifi_flags & IFF_RUNNING))
 688                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 689                                        -1, IF_OPER_UP);
 690
 691         attrlen = len;
 692         attr = (struct rtattr *) buf;
 693
 694         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 695         while (RTA_OK(attr, attrlen)) {
 696                 if (attr->rta_type == IFLA_WIRELESS) {
 697                         wpa_driver_wext_event_wireless(
 698                                 drv, ((char *) attr) + rta_len,
 699                                 attr->rta_len - rta_len);
 700                 } else if (attr->rta_type == IFLA_IFNAME) {
 701                         wpa_driver_wext_event_link(drv,
 702                                                    ((char *) attr) + rta_len,
 703                                                    attr->rta_len - rta_len, 0);
 704                 }
 705                 attr = RTA_NEXT(attr, attrlen);
 706         }
 707 }
 708
 709
 710 static void wpa_driver_wext_event_rtm_dellink(void *ctx, struct ifinfomsg *ifi,
 711                                               u8 *buf, size_t len)
 712 {
 713         struct wpa_driver_wext_data *drv = ctx;
 714         int attrlen, rta_len;
 715         struct rtattr *attr;
 716
 717         attrlen = len;
 718         attr = (struct rtattr *) buf;
 719
 720         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 721         while (RTA_OK(attr, attrlen)) {
 722                 if (attr->rta_type == IFLA_IFNAME) {
 723                         wpa_driver_wext_event_link(drv,
 724                                                    ((char *) attr) + rta_len,
 725                                                    attr->rta_len - rta_len, 1);
 726                 }
 727                 attr = RTA_NEXT(attr, attrlen);
 728         }
 729 }
 730
 731
 732 static void wpa_driver_wext_rfkill_blocked(void *ctx)
 733 {
 734         wpa_printf(MSG_DEBUG, "WEXT: RFKILL blocked");
 735         /*
 736          * This may be for any interface; use ifdown event to disable
 737          * interface.
 738          */
 739 }
 740
 741
 742 static void wpa_driver_wext_rfkill_unblocked(void *ctx)
 743 {
 744         struct wpa_driver_wext_data *drv = ctx;
 745         wpa_printf(MSG_DEBUG, "WEXT: RFKILL unblocked");
 746         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
 747                 wpa_printf(MSG_DEBUG, "WEXT: Could not set interface UP "
 748                            "after rfkill unblock");
 749                 return;
 750         }
 751         /* rtnetlink ifup handler will report interface as enabled */
 752 }
 753
 754
 755 static void wext_get_phy_name(struct wpa_driver_wext_data *drv)
 756 {
 757         /* Find phy (radio) to which this interface belongs */
 758         char buf[90], *pos;
 759         int f, rv;
 760
 761         drv->phyname[0] = '\0';
 762         snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
 763                  drv->ifname);
 764         f = open(buf, O_RDONLY);
 765         if (f < 0) {
 766                 wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
 767                            buf, strerror(errno));
 768                 return;
 769         }
 770
 771         rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
 772         close(f);
 773         if (rv < 0) {
 774                 wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
 775                            buf, strerror(errno));
 776                 return;
 777         }
 778
 779         drv->phyname[rv] = '\0';
 780         pos = os_strchr(drv->phyname, '\n');
 781         if (pos)
 782                 *pos = '\0';
 783         wpa_printf(MSG_DEBUG, "wext: interface %s phy: %s",
 784                    drv->ifname, drv->phyname);
 785 }
 786
 787
 788 /**
 789  * wpa_driver_wext_init - Initialize WE driver interface
 790  * @ctx: context to be used when calling wpa_supplicant functions,
 791  * e.g., wpa_supplicant_event()
 792  * @ifname: interface name, e.g., wlan0
 793  * Returns: Pointer to private data, %NULL on failure
 794  */
 795 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 796 {
 797         struct wpa_driver_wext_data *drv;
 798         struct netlink_config *cfg;
 799         struct rfkill_config *rcfg;
 800         char path[128];
 801         struct stat buf;
 802
 803         drv = os_zalloc(sizeof(*drv));
 804         if (drv == NULL)
 805                 return NULL;
 806         drv->ctx = ctx;
 807         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 808
 809         os_snprintf(path, sizeof(path), "/sys/class/net/%s/phy80211", ifname);
 810         if (stat(path, &buf) == 0) {
 811                 wpa_printf(MSG_DEBUG, "WEXT: cfg80211-based driver detected");
 812                 drv->cfg80211 = 1;
 813                 wext_get_phy_name(drv);
 814         }
 815
 816         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 817         if (drv->ioctl_sock < 0) {
 818                 perror("socket(PF_INET,SOCK_DGRAM)");
 819                 goto err1;
 820         }
 821
 822         cfg = os_zalloc(sizeof(*cfg));
 823         if (cfg == NULL)
 824                 goto err1;
 825         cfg->ctx = drv;
 826         cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink;
 827         cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink;
 828         drv->netlink = netlink_init(cfg);
 829         if (drv->netlink == NULL) {
 830                 os_free(cfg);
 831                 goto err2;
 832         }
 833
 834         rcfg = os_zalloc(sizeof(*rcfg));
 835         if (rcfg == NULL)
 836                 goto err3;
 837         rcfg->ctx = drv;
 838         os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
 839         rcfg->blocked_cb = wpa_driver_wext_rfkill_blocked;
 840         rcfg->unblocked_cb = wpa_driver_wext_rfkill_unblocked;
 841         drv->rfkill = rfkill_init(rcfg);
 842         if (drv->rfkill == NULL) {
 843                 wpa_printf(MSG_DEBUG, "WEXT: RFKILL status not available");
 844                 os_free(rcfg);
 845         }
 846
 847         drv->mlme_sock = -1;
 848
 849         if (wpa_driver_wext_finish_drv_init(drv) < 0)
 850                 goto err3;
 851
 852         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1);
 853
 854         return drv;
 855
 856 err3:
 857         rfkill_deinit(drv->rfkill);
 858         netlink_deinit(drv->netlink);
 859 err2:
 860         close(drv->ioctl_sock);
 861 err1:
 862         os_free(drv);
 863         return NULL;
 864 }
 865
 866
 867 static void wpa_driver_wext_send_rfkill(void *eloop_ctx, void *timeout_ctx)
 868 {
 869         wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
 870 }
 871
 872
 873 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
 874 {
 875         int send_rfkill_event = 0;
 876
 877         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1) < 0) {
 878                 if (rfkill_is_blocked(drv->rfkill)) {
 879                         wpa_printf(MSG_DEBUG, "WEXT: Could not yet enable "
 880                                    "interface '%s' due to rfkill",
 881                                    drv->ifname);
 882                         drv->if_disabled = 1;
 883                         send_rfkill_event = 1;
 884                 } else {
 885                         wpa_printf(MSG_ERROR, "WEXT: Could not set "
 886                                    "interface '%s' UP", drv->ifname);
 887                         return -1;
 888                 }
 889         }
 890
 891         /*
 892          * Make sure that the driver does not have any obsolete PMKID entries.
 893          */
 894         wpa_driver_wext_flush_pmkid(drv);
 895
 896         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
 897                 wpa_printf(MSG_DEBUG, "Could not configure driver to use "
 898                            "managed mode");
 899                 /* Try to use it anyway */
 900         }
 901
 902         wpa_driver_wext_get_range(drv);
 903
 904         /*
 905          * Unlock the driver's BSSID and force to a random SSID to clear any
 906          * previous association the driver might have when the supplicant
 907          * starts up.
 908          */
 909         wpa_driver_wext_disconnect(drv);
 910
 911         drv->ifindex = if_nametoindex(drv->ifname);
 912
 913         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
 914                 /*
 915                  * Host AP driver may use both wlan# and wifi# interface in
 916                  * wireless events. Since some of the versions included WE-18
 917                  * support, let's add the alternative ifindex also from
 918                  * driver_wext.c for the time being. This may be removed at
 919                  * some point once it is believed that old versions of the
 920                  * driver are not in use anymore.
 921                  */
 922                 char ifname2[IFNAMSIZ + 1];
 923                 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
 924                 os_memcpy(ifname2, "wifi", 4);
 925                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
 926         }
 927
 928         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 929                                1, IF_OPER_DORMANT);
 930
 931         if (send_rfkill_event) {
 932                 eloop_register_timeout(0, 0, wpa_driver_wext_send_rfkill,
 933                                        drv, drv->ctx);
 934         }
 935
 936         return 0;
 937 }
 938
 939
 940 /**
 941  * wpa_driver_wext_deinit - Deinitialize WE driver interface
 942  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 943  *
 944  * Shut down driver interface and processing of driver events. Free
 945  * private data buffer if one was allocated in wpa_driver_wext_init().
 946  */
 947 void wpa_driver_wext_deinit(void *priv)
 948 {
 949         struct wpa_driver_wext_data *drv = priv;
 950
 951         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
 952
 953         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
 954
 955         /*
 956          * Clear possibly configured driver parameters in order to make it
 957          * easier to use the driver after wpa_supplicant has been terminated.
 958          */
 959         wpa_driver_wext_disconnect(drv);
 960
 961         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
 962         netlink_deinit(drv->netlink);
 963         rfkill_deinit(drv->rfkill);
 964
 965         if (drv->mlme_sock >= 0)
 966                 eloop_unregister_read_sock(drv->mlme_sock);
 967
 968         (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
 969
 970         close(drv->ioctl_sock);
 971         if (drv->mlme_sock >= 0)
 972                 close(drv->mlme_sock);
 973         os_free(drv->assoc_req_ies);
 974         os_free(drv->assoc_resp_ies);
 975         os_free(drv);
 976 }
 977
 978
 979 /**
 980  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
 981  * @eloop_ctx: Unused
 982  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
 983  *
 984  * This function can be used as registered timeout when starting a scan to
 985  * generate a scan completed event if the driver does not report this.
 986  */
 987 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 988 {
 989         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
 990         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
 991 }
 992
 993
 994 /**
 995  * wpa_driver_wext_scan - Request the driver to initiate scan
 996  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 997  * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
 998  * Returns: 0 on success, -1 on failure
 999  */
1000 int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
1001 {
1002         struct wpa_driver_wext_data *drv = priv;
1003         struct iwreq iwr;
1004         int ret = 0, timeout;
1005         struct iw_scan_req req;
1006         const u8 *ssid = params->ssids[0].ssid;
1007         size_t ssid_len = params->ssids[0].ssid_len;
1008
1009         if (ssid_len > IW_ESSID_MAX_SIZE) {
1010                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1011                            __FUNCTION__, (unsigned long) ssid_len);
1012                 return -1;
1013         }
1014
1015         os_memset(&iwr, 0, sizeof(iwr));
1016         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1017
1018         if (ssid && ssid_len) {
1019                 os_memset(&req, 0, sizeof(req));
1020                 req.essid_len = ssid_len;
1021                 req.bssid.sa_family = ARPHRD_ETHER;
1022                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1023                 os_memcpy(req.essid, ssid, ssid_len);
1024                 iwr.u.data.pointer = (caddr_t) &req;
1025                 iwr.u.data.length = sizeof(req);
1026                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1027         }
1028
1029         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1030                 perror("ioctl[SIOCSIWSCAN]");
1031                 ret = -1;
1032         }
1033
1034         /* Not all drivers generate "scan completed" wireless event, so try to
1035          * read results after a timeout. */
1036         timeout = 10;
1037         if (drv->scan_complete_events) {
1038                 /*
1039                  * The driver seems to deliver SIOCGIWSCAN events to notify
1040                  * when scan is complete, so use longer timeout to avoid race
1041                  * conditions with scanning and following association request.
1042                  */
1043                 timeout = 30;
1044         }
1045         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1046                    "seconds", ret, timeout);
1047         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1048         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1049                                drv->ctx);
1050
1051         return ret;
1052 }
1053
1054
1055 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1056                                     size_t *len)
1057 {
1058         struct iwreq iwr;
1059         u8 *res_buf;
1060         size_t res_buf_len;
1061
1062         res_buf_len = IW_SCAN_MAX_DATA;
1063         for (;;) {
1064                 res_buf = os_malloc(res_buf_len);
1065                 if (res_buf == NULL)
1066                         return NULL;
1067                 os_memset(&iwr, 0, sizeof(iwr));
1068                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1069                 iwr.u.data.pointer = res_buf;
1070                 iwr.u.data.length = res_buf_len;
1071
1072                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1073                         break;
1074
1075                 if (errno == E2BIG && res_buf_len < 65535) {
1076                         os_free(res_buf);
1077                         res_buf = NULL;
1078                         res_buf_len *= 2;
1079                         if (res_buf_len > 65535)
1080                                 res_buf_len = 65535; /* 16-bit length field */
1081                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1082                                    "trying larger buffer (%lu bytes)",
1083                                    (unsigned long) res_buf_len);
1084                 } else {
1085                         perror("ioctl[SIOCGIWSCAN]");
1086                         os_free(res_buf);
1087                         return NULL;
1088                 }
1089         }
1090
1091         if (iwr.u.data.length > res_buf_len) {
1092                 os_free(res_buf);
1093                 return NULL;
1094         }
1095         *len = iwr.u.data.length;
1096
1097         return res_buf;
1098 }
1099
1100
1101 /*
1102  * Data structure for collecting WEXT scan results. This is needed to allow
1103  * the various methods of reporting IEs to be combined into a single IE buffer.
1104  */
1105 struct wext_scan_data {
1106         struct wpa_scan_res res;
1107         u8 *ie;
1108         size_t ie_len;
1109         u8 ssid[32];
1110         size_t ssid_len;
1111         int maxrate;
1112 };
1113
1114
1115 static void wext_get_scan_mode(struct iw_event *iwe,
1116                                struct wext_scan_data *res)
1117 {
1118         if (iwe->u.mode == IW_MODE_ADHOC)
1119                 res->res.caps |= IEEE80211_CAP_IBSS;
1120         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1121                 res->res.caps |= IEEE80211_CAP_ESS;
1122 }
1123
1124
1125 static void wext_get_scan_ssid(struct iw_event *iwe,
1126                                struct wext_scan_data *res, char *custom,
1127                                char *end)
1128 {
1129         int ssid_len = iwe->u.essid.length;
1130         if (custom + ssid_len > end)
1131                 return;
1132         if (iwe->u.essid.flags &&
1133             ssid_len > 0 &&
1134             ssid_len <= IW_ESSID_MAX_SIZE) {
1135                 os_memcpy(res->ssid, custom, ssid_len);
1136                 res->ssid_len = ssid_len;
1137         }
1138 }
1139
1140
1141 static void wext_get_scan_freq(struct iw_event *iwe,
1142                                struct wext_scan_data *res)
1143 {
1144         int divi = 1000000, i;
1145
1146         if (iwe->u.freq.e == 0) {
1147                 /*
1148                  * Some drivers do not report frequency, but a channel.
1149                  * Try to map this to frequency by assuming they are using
1150                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1151                  * frequency if the driver sends both frequency and channel,
1152                  * since the driver may be sending an A-band channel that we
1153                  * don't handle here.
1154                  */
1155
1156                 if (res->res.freq)
1157                         return;
1158
1159                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1160                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1161                         return;
1162                 } else if (iwe->u.freq.m == 14) {
1163                         res->res.freq = 2484;
1164                         return;
1165                 }
1166         }
1167
1168         if (iwe->u.freq.e > 6) {
1169                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1170                            MACSTR " m=%d e=%d)",
1171                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1172                            iwe->u.freq.e);
1173                 return;
1174         }
1175
1176         for (i = 0; i < iwe->u.freq.e; i++)
1177                 divi /= 10;
1178         res->res.freq = iwe->u.freq.m / divi;
1179 }
1180
1181
1182 static void wext_get_scan_qual(struct wpa_driver_wext_data *drv,
1183                                struct iw_event *iwe,
1184                                struct wext_scan_data *res)
1185 {
1186         res->res.qual = iwe->u.qual.qual;
1187         res->res.noise = iwe->u.qual.noise;
1188         res->res.level = iwe->u.qual.level;
1189         if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
1190                 res->res.flags |= WPA_SCAN_QUAL_INVALID;
1191         if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
1192                 res->res.flags |= WPA_SCAN_LEVEL_INVALID;
1193         if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
1194                 res->res.flags |= WPA_SCAN_NOISE_INVALID;
1195         if (iwe->u.qual.updated & IW_QUAL_DBM)
1196                 res->res.flags |= WPA_SCAN_LEVEL_DBM;
1197         if ((iwe->u.qual.updated & IW_QUAL_DBM) ||
1198             ((iwe->u.qual.level != 0) &&
1199              (iwe->u.qual.level > drv->max_level))) {
1200                 if (iwe->u.qual.level >= 64)
1201                         res->res.level -= 0x100;
1202                 if (iwe->u.qual.noise >= 64)
1203                         res->res.noise -= 0x100;
1204         }
1205 }
1206
1207
1208 static void wext_get_scan_encode(struct iw_event *iwe,
1209                                  struct wext_scan_data *res)
1210 {
1211         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1212                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1213 }
1214
1215
1216 static void wext_get_scan_rate(struct iw_event *iwe,
1217                                struct wext_scan_data *res, char *pos,
1218                                char *end)
1219 {
1220         int maxrate;
1221         char *custom = pos + IW_EV_LCP_LEN;
1222         struct iw_param p;
1223         size_t clen;
1224
1225         clen = iwe->len;
1226         if (custom + clen > end)
1227                 return;
1228         maxrate = 0;
1229         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1230                 /* Note: may be misaligned, make a local, aligned copy */
1231                 os_memcpy(&p, custom, sizeof(struct iw_param));
1232                 if (p.value > maxrate)
1233                         maxrate = p.value;
1234                 clen -= sizeof(struct iw_param);
1235                 custom += sizeof(struct iw_param);
1236         }
1237
1238         /* Convert the maxrate from WE-style (b/s units) to
1239          * 802.11 rates (500000 b/s units).
1240          */
1241         res->maxrate = maxrate / 500000;
1242 }
1243
1244
1245 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1246                                     struct wext_scan_data *res, char *custom,
1247                                     char *end)
1248 {
1249         char *genie, *gpos, *gend;
1250         u8 *tmp;
1251
1252         if (iwe->u.data.length == 0)
1253                 return;
1254
1255         gpos = genie = custom;
1256         gend = genie + iwe->u.data.length;
1257         if (gend > end) {
1258                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1259                 return;
1260         }
1261
1262         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1263         if (tmp == NULL)
1264                 return;
1265         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1266         res->ie = tmp;
1267         res->ie_len += gend - gpos;
1268 }
1269
1270
1271 static void wext_get_scan_custom(struct iw_event *iwe,
1272                                  struct wext_scan_data *res, char *custom,
1273                                  char *end)
1274 {
1275         size_t clen;
1276         u8 *tmp;
1277
1278         clen = iwe->u.data.length;
1279         if (custom + clen > end)
1280                 return;
1281
1282         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1283                 char *spos;
1284                 int bytes;
1285                 spos = custom + 7;
1286                 bytes = custom + clen - spos;
1287                 if (bytes & 1 || bytes == 0)
1288                         return;
1289                 bytes /= 2;
1290                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1291                 if (tmp == NULL)
1292                         return;
1293                 res->ie = tmp;
1294                 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1295                         return;
1296                 res->ie_len += bytes;
1297         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1298                 char *spos;
1299                 int bytes;
1300                 spos = custom + 7;
1301                 bytes = custom + clen - spos;
1302                 if (bytes & 1 || bytes == 0)
1303                         return;
1304                 bytes /= 2;
1305                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1306                 if (tmp == NULL)
1307                         return;
1308                 res->ie = tmp;
1309                 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1310                         return;
1311                 res->ie_len += bytes;
1312         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1313                 char *spos;
1314                 int bytes;
1315                 u8 bin[8];
1316                 spos = custom + 4;
1317                 bytes = custom + clen - spos;
1318                 if (bytes != 16) {
1319                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1320                         return;
1321                 }
1322                 bytes /= 2;
1323                 if (hexstr2bin(spos, bin, bytes) < 0) {
1324                         wpa_printf(MSG_DEBUG, "WEXT: Invalid TSF value");
1325                         return;
1326                 }
1327                 res->res.tsf += WPA_GET_BE64(bin);
1328         }
1329 }
1330
1331
1332 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1333 {
1334         return drv->we_version_compiled > 18 &&
1335                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1336                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1337 }
1338
1339
1340 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1341                                            struct wext_scan_data *data)
1342 {
1343         struct wpa_scan_res **tmp;
1344         struct wpa_scan_res *r;
1345         size_t extra_len;
1346         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1347
1348         /* Figure out whether we need to fake any IEs */
1349         pos = data->ie;
1350         end = pos + data->ie_len;
1351         while (pos && pos + 1 < end) {
1352                 if (pos + 2 + pos[1] > end)
1353                         break;
1354                 if (pos[0] == WLAN_EID_SSID)
1355                         ssid_ie = pos;
1356                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1357                         rate_ie = pos;
1358                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1359                         rate_ie = pos;
1360                 pos += 2 + pos[1];
1361         }
1362
1363         extra_len = 0;
1364         if (ssid_ie == NULL)
1365                 extra_len += 2 + data->ssid_len;
1366         if (rate_ie == NULL && data->maxrate)
1367                 extra_len += 3;
1368
1369         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1370         if (r == NULL)
1371                 return;
1372         os_memcpy(r, &data->res, sizeof(*r));
1373         r->ie_len = extra_len + data->ie_len;
1374         pos = (u8 *) (r + 1);
1375         if (ssid_ie == NULL) {
1376                 /*
1377                  * Generate a fake SSID IE since the driver did not report
1378                  * a full IE list.
1379                  */
1380                 *pos++ = WLAN_EID_SSID;
1381                 *pos++ = data->ssid_len;
1382                 os_memcpy(pos, data->ssid, data->ssid_len);
1383                 pos += data->ssid_len;
1384         }
1385         if (rate_ie == NULL && data->maxrate) {
1386                 /*
1387                  * Generate a fake Supported Rates IE since the driver did not
1388                  * report a full IE list.
1389                  */
1390                 *pos++ = WLAN_EID_SUPP_RATES;
1391                 *pos++ = 1;
1392                 *pos++ = data->maxrate;
1393         }
1394         if (data->ie)
1395                 os_memcpy(pos, data->ie, data->ie_len);
1396
1397         tmp = os_realloc_array(res->res, res->num + 1,
1398                                sizeof(struct wpa_scan_res *));
1399         if (tmp == NULL) {
1400                 os_free(r);
1401                 return;
1402         }
1403         tmp[res->num++] = r;
1404         res->res = tmp;
1405 }
1406
1407
1408 /**
1409  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1410  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1411  * Returns: Scan results on success, -1 on failure
1412  */
1413 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1414 {
1415         struct wpa_driver_wext_data *drv = priv;
1416         size_t len;
1417         int first;
1418         u8 *res_buf;
1419         struct iw_event iwe_buf, *iwe = &iwe_buf;
1420         char *pos, *end, *custom;
1421         struct wpa_scan_results *res;
1422         struct wext_scan_data data;
1423
1424         res_buf = wpa_driver_wext_giwscan(drv, &len);
1425         if (res_buf == NULL)
1426                 return NULL;
1427
1428         first = 1;
1429
1430         res = os_zalloc(sizeof(*res));
1431         if (res == NULL) {
1432                 os_free(res_buf);
1433                 return NULL;
1434         }
1435
1436         pos = (char *) res_buf;
1437         end = (char *) res_buf + len;
1438         os_memset(&data, 0, sizeof(data));
1439
1440         while (pos + IW_EV_LCP_LEN <= end) {
1441                 /* Event data may be unaligned, so make a local, aligned copy
1442                  * before processing. */
1443                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1444                 if (iwe->len <= IW_EV_LCP_LEN)
1445                         break;
1446
1447                 custom = pos + IW_EV_POINT_LEN;
1448                 if (wext_19_iw_point(drv, iwe->cmd)) {
1449                         /* WE-19 removed the pointer from struct iw_point */
1450                         char *dpos = (char *) &iwe_buf.u.data.length;
1451                         int dlen = dpos - (char *) &iwe_buf;
1452                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1453                                   sizeof(struct iw_event) - dlen);
1454                 } else {
1455                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1456                         custom += IW_EV_POINT_OFF;
1457                 }
1458
1459                 switch (iwe->cmd) {
1460                 case SIOCGIWAP:
1461                         if (!first)
1462                                 wpa_driver_wext_add_scan_entry(res, &data);
1463                         first = 0;
1464                         os_free(data.ie);
1465                         os_memset(&data, 0, sizeof(data));
1466                         os_memcpy(data.res.bssid,
1467                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1468                         break;
1469                 case SIOCGIWMODE:
1470                         wext_get_scan_mode(iwe, &data);
1471                         break;
1472                 case SIOCGIWESSID:
1473                         wext_get_scan_ssid(iwe, &data, custom, end);
1474                         break;
1475                 case SIOCGIWFREQ:
1476                         wext_get_scan_freq(iwe, &data);
1477                         break;
1478                 case IWEVQUAL:
1479                         wext_get_scan_qual(drv, iwe, &data);
1480                         break;
1481                 case SIOCGIWENCODE:
1482                         wext_get_scan_encode(iwe, &data);
1483                         break;
1484                 case SIOCGIWRATE:
1485                         wext_get_scan_rate(iwe, &data, pos, end);
1486                         break;
1487                 case IWEVGENIE:
1488                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1489                         break;
1490                 case IWEVCUSTOM:
1491                         wext_get_scan_custom(iwe, &data, custom, end);
1492                         break;
1493                 }
1494
1495                 pos += iwe->len;
1496         }
1497         os_free(res_buf);
1498         res_buf = NULL;
1499         if (!first)
1500                 wpa_driver_wext_add_scan_entry(res, &data);
1501         os_free(data.ie);
1502
1503         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1504                    (unsigned long) len, (unsigned long) res->num);
1505
1506         return res;
1507 }
1508
1509
1510 static int wpa_driver_wext_get_range(void *priv)
1511 {
1512         struct wpa_driver_wext_data *drv = priv;
1513         struct iw_range *range;
1514         struct iwreq iwr;
1515         int minlen;
1516         size_t buflen;
1517
1518         /*
1519          * Use larger buffer than struct iw_range in order to allow the
1520          * structure to grow in the future.
1521          */
1522         buflen = sizeof(struct iw_range) + 500;
1523         range = os_zalloc(buflen);
1524         if (range == NULL)
1525                 return -1;
1526
1527         os_memset(&iwr, 0, sizeof(iwr));
1528         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1529         iwr.u.data.pointer = (caddr_t) range;
1530         iwr.u.data.length = buflen;
1531
1532         minlen = ((char *) &range->enc_capa) - (char *) range +
1533                 sizeof(range->enc_capa);
1534
1535         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1536                 perror("ioctl[SIOCGIWRANGE]");
1537                 os_free(range);
1538                 return -1;
1539         } else if (iwr.u.data.length >= minlen &&
1540                    range->we_version_compiled >= 18) {
1541                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1542                            "WE(source)=%d enc_capa=0x%x",
1543                            range->we_version_compiled,
1544                            range->we_version_source,
1545                            range->enc_capa);
1546                 drv->has_capability = 1;
1547                 drv->we_version_compiled = range->we_version_compiled;
1548                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1549                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1550                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1551                 }
1552                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1553                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1554                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1555                 }
1556                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1557                         WPA_DRIVER_CAPA_ENC_WEP104;
1558                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP128;
1559                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1560                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1561                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1562                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1563                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1564                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1565                 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1566                         WPA_DRIVER_AUTH_SHARED |
1567                         WPA_DRIVER_AUTH_LEAP;
1568                 drv->capa.max_scan_ssids = 1;
1569
1570                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1571                            "flags 0x%llx",
1572                            drv->capa.key_mgmt, drv->capa.enc,
1573                            (unsigned long long) drv->capa.flags);
1574         } else {
1575                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1576                            "assuming WPA is not supported");
1577         }
1578
1579         drv->max_level = range->max_qual.level;
1580
1581         os_free(range);
1582         return 0;
1583 }
1584
1585
1586 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1587                                    const u8 *psk)
1588 {
1589         struct iw_encode_ext *ext;
1590         struct iwreq iwr;
1591         int ret;
1592
1593         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1594
1595         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1596                 return 0;
1597
1598         if (!psk)
1599                 return 0;
1600
1601         os_memset(&iwr, 0, sizeof(iwr));
1602         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1603
1604         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1605         if (ext == NULL)
1606                 return -1;
1607
1608         iwr.u.encoding.pointer = (caddr_t) ext;
1609         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1610         ext->key_len = PMK_LEN;
1611         os_memcpy(&ext->key, psk, ext->key_len);
1612         ext->alg = IW_ENCODE_ALG_PMK;
1613
1614         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1615         if (ret < 0)
1616                 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1617         os_free(ext);
1618
1619         return ret;
1620 }
1621
1622
1623 static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg,
1624                                        const u8 *addr, int key_idx,
1625                                        int set_tx, const u8 *seq,
1626                                        size_t seq_len,
1627                                        const u8 *key, size_t key_len)
1628 {
1629         struct wpa_driver_wext_data *drv = priv;
1630         struct iwreq iwr;
1631         int ret = 0;
1632         struct iw_encode_ext *ext;
1633
1634         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1635                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1636                            __FUNCTION__, (unsigned long) seq_len);
1637                 return -1;
1638         }
1639
1640         ext = os_zalloc(sizeof(*ext) + key_len);
1641         if (ext == NULL)
1642                 return -1;
1643         os_memset(&iwr, 0, sizeof(iwr));
1644         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1645         iwr.u.encoding.flags = key_idx + 1;
1646         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1647         if (alg == WPA_ALG_NONE)
1648                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1649         iwr.u.encoding.pointer = (caddr_t) ext;
1650         iwr.u.encoding.length = sizeof(*ext) + key_len;
1651
1652         if (addr == NULL || is_broadcast_ether_addr(addr))
1653                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1654         if (set_tx)
1655                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1656
1657         ext->addr.sa_family = ARPHRD_ETHER;
1658         if (addr)
1659                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1660         else
1661                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1662         if (key && key_len) {
1663                 os_memcpy(ext + 1, key, key_len);
1664                 ext->key_len = key_len;
1665         }
1666         switch (alg) {
1667         case WPA_ALG_NONE:
1668                 ext->alg = IW_ENCODE_ALG_NONE;
1669                 break;
1670         case WPA_ALG_WEP:
1671                 ext->alg = IW_ENCODE_ALG_WEP;
1672                 break;
1673         case WPA_ALG_TKIP:
1674                 ext->alg = IW_ENCODE_ALG_TKIP;
1675                 break;
1676         case WPA_ALG_CCMP:
1677                 ext->alg = IW_ENCODE_ALG_CCMP;
1678                 break;
1679         case WPA_ALG_PMK:
1680                 ext->alg = IW_ENCODE_ALG_PMK;
1681                 break;
1682 #ifdef CONFIG_IEEE80211W
1683         case WPA_ALG_IGTK:
1684                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1685                 break;
1686 #endif /* CONFIG_IEEE80211W */
1687         default:
1688                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1689                            __FUNCTION__, alg);
1690                 os_free(ext);
1691                 return -1;
1692         }
1693
1694         if (seq && seq_len) {
1695                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1696                 os_memcpy(ext->rx_seq, seq, seq_len);
1697         }
1698
1699         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1700                 ret = errno == EOPNOTSUPP ? -2 : -1;
1701                 if (errno == ENODEV) {
1702                         /*
1703                          * ndiswrapper seems to be returning incorrect error
1704                          * code.. */
1705                         ret = -2;
1706                 }
1707
1708                 perror("ioctl[SIOCSIWENCODEEXT]");
1709         }
1710
1711         os_free(ext);
1712         return ret;
1713 }
1714
1715
1716 /**
1717  * wpa_driver_wext_set_key - Configure encryption key
1718  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1719  * @priv: Private driver interface data
1720  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1721  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1722  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1723  *      broadcast/default keys
1724  * @key_idx: key index (0..3), usually 0 for unicast keys
1725  * @set_tx: Configure this key as the default Tx key (only used when
1726  *      driver does not support separate unicast/individual key
1727  * @seq: Sequence number/packet number, seq_len octets, the next
1728  *      packet number to be used for in replay protection; configured
1729  *      for Rx keys (in most cases, this is only used with broadcast
1730  *      keys and set to zero for unicast keys)
1731  * @seq_len: Length of the seq, depends on the algorithm:
1732  *      TKIP: 6 octets, CCMP: 6 octets
1733  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1734  *      8-byte Rx Mic Key
1735  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1736  *      TKIP: 32, CCMP: 16)
1737  * Returns: 0 on success, -1 on failure
1738  *
1739  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1740  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1741  */
1742 int wpa_driver_wext_set_key(const char *ifname, void *priv, enum wpa_alg alg,
1743                             const u8 *addr, int key_idx,
1744                             int set_tx, const u8 *seq, size_t seq_len,
1745                             const u8 *key, size_t key_len)
1746 {
1747         struct wpa_driver_wext_data *drv = priv;
1748         struct iwreq iwr;
1749         int ret = 0;
1750
1751         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1752                    "key_len=%lu",
1753                    __FUNCTION__, alg, key_idx, set_tx,
1754                    (unsigned long) seq_len, (unsigned long) key_len);
1755
1756         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1757                                           seq, seq_len, key, key_len);
1758         if (ret == 0)
1759                 return 0;
1760
1761         if (ret == -2 &&
1762             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1763                 wpa_printf(MSG_DEBUG, "Driver did not support "
1764                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1765                 ret = 0;
1766         } else {
1767                 wpa_printf(MSG_DEBUG, "Driver did not support "
1768                            "SIOCSIWENCODEEXT");
1769                 return ret;
1770         }
1771
1772         os_memset(&iwr, 0, sizeof(iwr));
1773         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1774         iwr.u.encoding.flags = key_idx + 1;
1775         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1776         if (alg == WPA_ALG_NONE)
1777                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1778         iwr.u.encoding.pointer = (caddr_t) key;
1779         iwr.u.encoding.length = key_len;
1780
1781         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1782                 perror("ioctl[SIOCSIWENCODE]");
1783                 ret = -1;
1784         }
1785
1786         if (set_tx && alg != WPA_ALG_NONE) {
1787                 os_memset(&iwr, 0, sizeof(iwr));
1788                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1789                 iwr.u.encoding.flags = key_idx + 1;
1790                 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1791                 iwr.u.encoding.pointer = (caddr_t) NULL;
1792                 iwr.u.encoding.length = 0;
1793                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1794                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1795                         ret = -1;
1796                 }
1797         }
1798
1799         return ret;
1800 }
1801
1802
1803 static int wpa_driver_wext_set_countermeasures(void *priv,
1804                                                int enabled)
1805 {
1806         struct wpa_driver_wext_data *drv = priv;
1807         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1808         return wpa_driver_wext_set_auth_param(drv,
1809                                               IW_AUTH_TKIP_COUNTERMEASURES,
1810                                               enabled);
1811 }
1812
1813
1814 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1815                                                 int enabled)
1816 {
1817         struct wpa_driver_wext_data *drv = priv;
1818         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1819         drv->use_crypt = enabled;
1820         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1821                                               enabled);
1822 }
1823
1824
1825 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1826                                 const u8 *addr, int cmd, int reason_code)
1827 {
1828         struct iwreq iwr;
1829         struct iw_mlme mlme;
1830         int ret = 0;
1831
1832         os_memset(&iwr, 0, sizeof(iwr));
1833         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1834         os_memset(&mlme, 0, sizeof(mlme));
1835         mlme.cmd = cmd;
1836         mlme.reason_code = reason_code;
1837         mlme.addr.sa_family = ARPHRD_ETHER;
1838         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1839         iwr.u.data.pointer = (caddr_t) &mlme;
1840         iwr.u.data.length = sizeof(mlme);
1841
1842         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1843                 perror("ioctl[SIOCSIWMLME]");
1844                 ret = -1;
1845         }
1846
1847         return ret;
1848 }
1849
1850
1851 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
1852 {
1853         struct iwreq iwr;
1854         const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
1855         u8 ssid[32];
1856         int i;
1857
1858         /*
1859          * Only force-disconnect when the card is in infrastructure mode,
1860          * otherwise the driver might interpret the cleared BSSID and random
1861          * SSID as an attempt to create a new ad-hoc network.
1862          */
1863         os_memset(&iwr, 0, sizeof(iwr));
1864         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1865         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
1866                 perror("ioctl[SIOCGIWMODE]");
1867                 iwr.u.mode = IW_MODE_INFRA;
1868         }
1869
1870         if (iwr.u.mode == IW_MODE_INFRA) {
1871                 /* Clear the BSSID selection */
1872                 if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0) {
1873                         wpa_printf(MSG_DEBUG, "WEXT: Failed to clear BSSID "
1874                                    "selection on disconnect");
1875                 }
1876
1877                 if (drv->cfg80211) {
1878                         /*
1879                          * cfg80211 supports SIOCSIWMLME commands, so there is
1880                          * no need for the random SSID hack, but clear the
1881                          * SSID.
1882                          */
1883                         if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
1884                                 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear "
1885                                            "SSID on disconnect");
1886                         }
1887                         return;
1888                 }
1889
1890                 /*
1891                  * Set a random SSID to make sure the driver will not be trying
1892                  * to associate with something even if it does not understand
1893                  * SIOCSIWMLME commands (or tries to associate automatically
1894                  * after deauth/disassoc).
1895                  */
1896                 for (i = 0; i < 32; i++)
1897                         ssid[i] = rand() & 0xFF;
1898                 if (wpa_driver_wext_set_ssid(drv, ssid, 32) < 0) {
1899                         wpa_printf(MSG_DEBUG, "WEXT: Failed to set bogus "
1900                                    "SSID to disconnect");
1901                 }
1902         }
1903 }
1904
1905
1906 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1907                                           int reason_code)
1908 {
1909         struct wpa_driver_wext_data *drv = priv;
1910         int ret;
1911         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1912         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1913         wpa_driver_wext_disconnect(drv);
1914         return ret;
1915 }
1916
1917
1918 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
1919                                       size_t ie_len)
1920 {
1921         struct wpa_driver_wext_data *drv = priv;
1922         struct iwreq iwr;
1923         int ret = 0;
1924
1925         os_memset(&iwr, 0, sizeof(iwr));
1926         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1927         iwr.u.data.pointer = (caddr_t) ie;
1928         iwr.u.data.length = ie_len;
1929
1930         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1931                 perror("ioctl[SIOCSIWGENIE]");
1932                 ret = -1;
1933         }
1934
1935         return ret;
1936 }
1937
1938
1939 int wpa_driver_wext_cipher2wext(int cipher)
1940 {
1941         switch (cipher) {
1942         case WPA_CIPHER_NONE:
1943                 return IW_AUTH_CIPHER_NONE;
1944         case WPA_CIPHER_WEP40:
1945                 return IW_AUTH_CIPHER_WEP40;
1946         case WPA_CIPHER_TKIP:
1947                 return IW_AUTH_CIPHER_TKIP;
1948         case WPA_CIPHER_CCMP:
1949                 return IW_AUTH_CIPHER_CCMP;
1950         case WPA_CIPHER_WEP104:
1951                 return IW_AUTH_CIPHER_WEP104;
1952         default:
1953                 return 0;
1954         }
1955 }
1956
1957
1958 int wpa_driver_wext_keymgmt2wext(int keymgmt)
1959 {
1960         switch (keymgmt) {
1961         case WPA_KEY_MGMT_IEEE8021X:
1962         case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
1963                 return IW_AUTH_KEY_MGMT_802_1X;
1964         case WPA_KEY_MGMT_PSK:
1965                 return IW_AUTH_KEY_MGMT_PSK;
1966         default:
1967                 return 0;
1968         }
1969 }
1970
1971
1972 static int
1973 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
1974                                   struct wpa_driver_associate_params *params)
1975 {
1976         struct iwreq iwr;
1977         int ret = 0;
1978
1979         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1980                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1981
1982         os_memset(&iwr, 0, sizeof(iwr));
1983         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1984         /* Just changing mode, not actual keys */
1985         iwr.u.encoding.flags = 0;
1986         iwr.u.encoding.pointer = (caddr_t) NULL;
1987         iwr.u.encoding.length = 0;
1988
1989         /*
1990          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
1991          * different things. Here they are used to indicate Open System vs.
1992          * Shared Key authentication algorithm. However, some drivers may use
1993          * them to select between open/restricted WEP encrypted (open = allow
1994          * both unencrypted and encrypted frames; restricted = only allow
1995          * encrypted frames).
1996          */
1997
1998         if (!drv->use_crypt) {
1999                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2000         } else {
2001                 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2002                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2003                 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2004                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2005         }
2006
2007         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2008                 perror("ioctl[SIOCSIWENCODE]");
2009                 ret = -1;
2010         }
2011
2012         return ret;
2013 }
2014
2015
2016 int wpa_driver_wext_associate(void *priv,
2017                               struct wpa_driver_associate_params *params)
2018 {
2019         struct wpa_driver_wext_data *drv = priv;
2020         int ret = 0;
2021         int allow_unencrypted_eapol;
2022         int value;
2023
2024         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2025
2026         if (drv->cfg80211) {
2027                 /*
2028                  * Stop cfg80211 from trying to associate before we are done
2029                  * with all parameters.
2030                  */
2031                 if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
2032                         wpa_printf(MSG_DEBUG,
2033                                    "WEXT: Failed to clear SSID to stop pending cfg80211 association attempts (if any)");
2034                         /* continue anyway */
2035                 }
2036         }
2037
2038         if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
2039             < 0)
2040                 ret = -1;
2041         if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
2042                 ret = -1;
2043         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2044                 ret = -1;
2045
2046         /*
2047          * If the driver did not support SIOCSIWAUTH, fallback to
2048          * SIOCSIWENCODE here.
2049          */
2050         if (drv->auth_alg_fallback &&
2051             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2052                 ret = -1;
2053
2054         if (!params->bssid &&
2055             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2056                 ret = -1;
2057
2058         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2059          * from configuration, not from here, where only the selected suite is
2060          * available */
2061         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2062             < 0)
2063                 ret = -1;
2064         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2065                 value = IW_AUTH_WPA_VERSION_DISABLED;
2066         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2067                 value = IW_AUTH_WPA_VERSION_WPA2;
2068         else
2069                 value = IW_AUTH_WPA_VERSION_WPA;
2070         if (wpa_driver_wext_set_auth_param(drv,
2071                                            IW_AUTH_WPA_VERSION, value) < 0)
2072                 ret = -1;
2073         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2074         if (wpa_driver_wext_set_auth_param(drv,
2075                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2076                 ret = -1;
2077         value = wpa_driver_wext_cipher2wext(params->group_suite);
2078         if (wpa_driver_wext_set_auth_param(drv,
2079                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2080                 ret = -1;
2081         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2082         if (wpa_driver_wext_set_auth_param(drv,
2083                                            IW_AUTH_KEY_MGMT, value) < 0)
2084                 ret = -1;
2085         value = params->key_mgmt_suite != WPA_KEY_MGMT_NONE ||
2086                 params->pairwise_suite != WPA_CIPHER_NONE ||
2087                 params->group_suite != WPA_CIPHER_NONE ||
2088                 params->wpa_ie_len;
2089         if (wpa_driver_wext_set_auth_param(drv,
2090                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2091                 ret = -1;
2092
2093         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2094          * not using WPA. IEEE 802.1X specifies that these frames are not
2095          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2096         if (params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X ||
2097             params->key_mgmt_suite == WPA_KEY_MGMT_PSK)
2098                 allow_unencrypted_eapol = 0;
2099         else
2100                 allow_unencrypted_eapol = 1;
2101
2102         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2103                 ret = -1;
2104         if (wpa_driver_wext_set_auth_param(drv,
2105                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2106                                            allow_unencrypted_eapol) < 0)
2107                 ret = -1;
2108 #ifdef CONFIG_IEEE80211W
2109         switch (params->mgmt_frame_protection) {
2110         case NO_MGMT_FRAME_PROTECTION:
2111                 value = IW_AUTH_MFP_DISABLED;
2112                 break;
2113         case MGMT_FRAME_PROTECTION_OPTIONAL:
2114                 value = IW_AUTH_MFP_OPTIONAL;
2115                 break;
2116         case MGMT_FRAME_PROTECTION_REQUIRED:
2117                 value = IW_AUTH_MFP_REQUIRED;
2118                 break;
2119         };
2120         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2121                 ret = -1;
2122 #endif /* CONFIG_IEEE80211W */
2123         if (params->freq.freq &&
2124             wpa_driver_wext_set_freq(drv, params->freq.freq) < 0)
2125                 ret = -1;
2126         if (!drv->cfg80211 &&
2127             wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2128                 ret = -1;
2129         if (params->bssid &&
2130             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2131                 ret = -1;
2132         if (drv->cfg80211 &&
2133             wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2134                 ret = -1;
2135
2136         return ret;
2137 }
2138
2139
2140 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2141 {
2142         struct wpa_driver_wext_data *drv = priv;
2143         int algs = 0, res;
2144
2145         if (auth_alg & WPA_AUTH_ALG_OPEN)
2146                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2147         if (auth_alg & WPA_AUTH_ALG_SHARED)
2148                 algs |= IW_AUTH_ALG_SHARED_KEY;
2149         if (auth_alg & WPA_AUTH_ALG_LEAP)
2150                 algs |= IW_AUTH_ALG_LEAP;
2151         if (algs == 0) {
2152                 /* at least one algorithm should be set */
2153                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2154         }
2155
2156         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2157                                              algs);
2158         drv->auth_alg_fallback = res == -2;
2159         return res;
2160 }
2161
2162
2163 /**
2164  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2165  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2166  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2167  * Returns: 0 on success, -1 on failure
2168  */
2169 int wpa_driver_wext_set_mode(void *priv, int mode)
2170 {
2171         struct wpa_driver_wext_data *drv = priv;
2172         struct iwreq iwr;
2173         int ret = -1;
2174         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2175
2176         os_memset(&iwr, 0, sizeof(iwr));
2177         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2178         iwr.u.mode = new_mode;
2179         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2180                 ret = 0;
2181                 goto done;
2182         }
2183
2184         if (errno != EBUSY) {
2185                 perror("ioctl[SIOCSIWMODE]");
2186                 goto done;
2187         }
2188
2189         /* mac80211 doesn't allow mode changes while the device is up, so if
2190          * the device isn't in the mode we're about to change to, take device
2191          * down, try to set the mode again, and bring it back up.
2192          */
2193         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2194                 perror("ioctl[SIOCGIWMODE]");
2195                 goto done;
2196         }
2197
2198         if (iwr.u.mode == new_mode) {
2199                 ret = 0;
2200                 goto done;
2201         }
2202
2203         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
2204                 /* Try to set the mode again while the interface is down */
2205                 iwr.u.mode = new_mode;
2206                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2207                         perror("ioctl[SIOCSIWMODE]");
2208                 else
2209                         ret = 0;
2210
2211                 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1);
2212         }
2213
2214 done:
2215         return ret;
2216 }
2217
2218
2219 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2220                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2221 {
2222         struct iwreq iwr;
2223         struct iw_pmksa pmksa;
2224         int ret = 0;
2225
2226         os_memset(&iwr, 0, sizeof(iwr));
2227         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2228         os_memset(&pmksa, 0, sizeof(pmksa));
2229         pmksa.cmd = cmd;
2230         pmksa.bssid.sa_family = ARPHRD_ETHER;
2231         if (bssid)
2232                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2233         if (pmkid)
2234                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2235         iwr.u.data.pointer = (caddr_t) &pmksa;
2236         iwr.u.data.length = sizeof(pmksa);
2237
2238         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2239                 if (errno != EOPNOTSUPP)
2240                         perror("ioctl[SIOCSIWPMKSA]");
2241                 ret = -1;
2242         }
2243
2244         return ret;
2245 }
2246
2247
2248 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2249                                      const u8 *pmkid)
2250 {
2251         struct wpa_driver_wext_data *drv = priv;
2252         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2253 }
2254
2255
2256 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2257                                         const u8 *pmkid)
2258 {
2259         struct wpa_driver_wext_data *drv = priv;
2260         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2261 }
2262
2263
2264 static int wpa_driver_wext_flush_pmkid(void *priv)
2265 {
2266         struct wpa_driver_wext_data *drv = priv;
2267         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2268 }
2269
2270
2271 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2272 {
2273         struct wpa_driver_wext_data *drv = priv;
2274         if (!drv->has_capability)
2275                 return -1;
2276         os_memcpy(capa, &drv->capa, sizeof(*capa));
2277         return 0;
2278 }
2279
2280
2281 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2282                                         const char *ifname)
2283 {
2284         if (ifname == NULL) {
2285                 drv->ifindex2 = -1;
2286                 return 0;
2287         }
2288
2289         drv->ifindex2 = if_nametoindex(ifname);
2290         if (drv->ifindex2 <= 0)
2291                 return -1;
2292
2293         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2294                    "wireless events", drv->ifindex2, ifname);
2295
2296         return 0;
2297 }
2298
2299
2300 int wpa_driver_wext_set_operstate(void *priv, int state)
2301 {
2302         struct wpa_driver_wext_data *drv = priv;
2303
2304         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2305                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2306         drv->operstate = state;
2307         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
2308                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
2309 }
2310
2311
2312 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2313 {
2314         return drv->we_version_compiled;
2315 }
2316
2317
2318 static const char * wext_get_radio_name(void *priv)
2319 {
2320         struct wpa_driver_wext_data *drv = priv;
2321         return drv->phyname;
2322 }
2323
2324
2325 static int wpa_driver_wext_signal_poll(void *priv, struct wpa_signal_info *si)
2326 {
2327         struct wpa_driver_wext_data *drv = priv;
2328         struct iw_statistics stats;
2329         struct iwreq iwr;
2330
2331         os_memset(si, 0, sizeof(*si));
2332         si->current_signal = -9999;
2333         si->current_noise = 9999;
2334         si->chanwidth = CHAN_WIDTH_UNKNOWN;
2335
2336         os_memset(&iwr, 0, sizeof(iwr));
2337         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2338         iwr.u.data.pointer = (caddr_t) &stats;
2339         iwr.u.data.length = sizeof(stats);
2340         iwr.u.data.flags = 1;
2341
2342         if (ioctl(drv->ioctl_sock, SIOCGIWSTATS, &iwr) < 0) {
2343                 wpa_printf(MSG_ERROR, "WEXT: SIOCGIWSTATS: %s",
2344                            strerror(errno));
2345                 return -1;
2346         }
2347
2348         si->current_signal = stats.qual.level -
2349                 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2350         si->current_noise = stats.qual.noise -
2351                 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2352         return 0;
2353 }
2354
2355
2356 const struct wpa_driver_ops wpa_driver_wext_ops = {
2357         .name = "wext",
2358         .desc = "Linux wireless extensions (generic)",
2359         .get_bssid = wpa_driver_wext_get_bssid,
2360         .get_ssid = wpa_driver_wext_get_ssid,
2361         .set_key = wpa_driver_wext_set_key,
2362         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2363         .scan2 = wpa_driver_wext_scan,
2364         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2365         .deauthenticate = wpa_driver_wext_deauthenticate,
2366         .associate = wpa_driver_wext_associate,
2367         .init = wpa_driver_wext_init,
2368         .deinit = wpa_driver_wext_deinit,
2369         .add_pmkid = wpa_driver_wext_add_pmkid,
2370         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2371         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2372         .get_capa = wpa_driver_wext_get_capa,
2373         .set_operstate = wpa_driver_wext_set_operstate,
2374         .get_radio_name = wext_get_radio_name,
2375         .signal_poll = wpa_driver_wext_signal_poll,
2376 };