libeap/src/drivers/driver_wext.c

   1 /*
   2  * Driver interaction with generic Linux Wireless Extensions
   3  * Copyright (c) 2003-2015, 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 #include <dirent.h>
  22
  23 #include "linux_wext.h"
  24 #include "common.h"
  25 #include "eloop.h"
  26 #include "common/ieee802_11_defs.h"
  27 #include "common/wpa_common.h"
  28 #include "priv_netlink.h"
  29 #include "netlink.h"
  30 #include "linux_ioctl.h"
  31 #include "rfkill.h"
  32 #include "driver.h"
  33 #include "driver_wext.h"
  34
  35 static int wpa_driver_wext_flush_pmkid(void *priv);
  36 static int wpa_driver_wext_get_range(void *priv);
  37 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
  38 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv);
  39 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg);
  40
  41
  42 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
  43                                    int idx, u32 value)
  44 {
  45         struct iwreq iwr;
  46         int ret = 0;
  47
  48         os_memset(&iwr, 0, sizeof(iwr));
  49         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
  50         iwr.u.param.flags = idx & IW_AUTH_INDEX;
  51         iwr.u.param.value = value;
  52
  53         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
  54                 if (errno != EOPNOTSUPP) {
  55                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
  56                                    "value 0x%x) failed: %s)",
  57                                    idx, value, strerror(errno));
  58                 }
  59                 ret = errno == EOPNOTSUPP ? -2 : -1;
  60         }
  61
  62         return ret;
  63 }
  64
  65
  66 /**
  67  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
  68  * @priv: Pointer to private wext data from wpa_driver_wext_init()
  69  * @bssid: Buffer for BSSID
  70  * Returns: 0 on success, -1 on failure
  71  */
  72 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
  73 {
  74         struct wpa_driver_wext_data *drv = priv;
  75         struct iwreq iwr;
  76         int ret = 0;
  77
  78         os_memset(&iwr, 0, sizeof(iwr));
  79         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
  80
  81         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
  82                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWAP]: %s", strerror(errno));
  83                 ret = -1;
  84         }
  85         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
  86
  87         return ret;
  88 }
  89
  90
  91 /**
  92  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
  93  * @priv: Pointer to private wext data from wpa_driver_wext_init()
  94  * @bssid: BSSID
  95  * Returns: 0 on success, -1 on failure
  96  */
  97 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
  98 {
  99         struct wpa_driver_wext_data *drv = priv;
 100         struct iwreq iwr;
 101         int ret = 0;
 102
 103         os_memset(&iwr, 0, sizeof(iwr));
 104         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 105         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 106         if (bssid)
 107                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 108         else
 109                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 110
 111         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 112                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWAP]: %s", strerror(errno));
 113                 ret = -1;
 114         }
 115
 116         return ret;
 117 }
 118
 119
 120 /**
 121  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 122  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 123  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 124  * Returns: SSID length on success, -1 on failure
 125  */
 126 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 127 {
 128         struct wpa_driver_wext_data *drv = priv;
 129         struct iwreq iwr;
 130         int ret = 0;
 131
 132         os_memset(&iwr, 0, sizeof(iwr));
 133         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 134         iwr.u.essid.pointer = (caddr_t) ssid;
 135         iwr.u.essid.length = SSID_MAX_LEN;
 136
 137         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 138                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWESSID]: %s",
 139                            strerror(errno));
 140                 ret = -1;
 141         } else {
 142                 ret = iwr.u.essid.length;
 143                 if (ret > SSID_MAX_LEN)
 144                         ret = SSID_MAX_LEN;
 145                 /* Some drivers include nul termination in the SSID, so let's
 146                  * remove it here before further processing. WE-21 changes this
 147                  * to explicitly require the length _not_ to include nul
 148                  * termination. */
 149                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 150                     drv->we_version_compiled < 21)
 151                         ret--;
 152         }
 153
 154         return ret;
 155 }
 156
 157
 158 /**
 159  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 160  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 161  * @ssid: SSID
 162  * @ssid_len: Length of SSID (0..32)
 163  * Returns: 0 on success, -1 on failure
 164  */
 165 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 166 {
 167         struct wpa_driver_wext_data *drv = priv;
 168         struct iwreq iwr;
 169         int ret = 0;
 170         char buf[33];
 171
 172         if (ssid_len > SSID_MAX_LEN)
 173                 return -1;
 174
 175         os_memset(&iwr, 0, sizeof(iwr));
 176         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 177         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 178         iwr.u.essid.flags = (ssid_len != 0);
 179         os_memset(buf, 0, sizeof(buf));
 180         os_memcpy(buf, ssid, ssid_len);
 181         iwr.u.essid.pointer = (caddr_t) buf;
 182         if (drv->we_version_compiled < 21) {
 183                 /* For historic reasons, set SSID length to include one extra
 184                  * character, C string nul termination, even though SSID is
 185                  * really an octet string that should not be presented as a C
 186                  * string. Some Linux drivers decrement the length by one and
 187                  * can thus end up missing the last octet of the SSID if the
 188                  * length is not incremented here. WE-21 changes this to
 189                  * explicitly require the length _not_ to include nul
 190                  * termination. */
 191                 if (ssid_len)
 192                         ssid_len++;
 193         }
 194         iwr.u.essid.length = ssid_len;
 195
 196         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 197                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWESSID]: %s",
 198                            strerror(errno));
 199                 ret = -1;
 200         }
 201
 202         return ret;
 203 }
 204
 205
 206 /**
 207  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 208  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 209  * @freq: Frequency in MHz
 210  * Returns: 0 on success, -1 on failure
 211  */
 212 int wpa_driver_wext_set_freq(void *priv, int freq)
 213 {
 214         struct wpa_driver_wext_data *drv = priv;
 215         struct iwreq iwr;
 216         int ret = 0;
 217
 218         os_memset(&iwr, 0, sizeof(iwr));
 219         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 220         iwr.u.freq.m = freq * 100000;
 221         iwr.u.freq.e = 1;
 222
 223         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 224                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWFREQ]: %s",
 225                            strerror(errno));
 226                 ret = -1;
 227         }
 228
 229         return ret;
 230 }
 231
 232
 233 static void
 234 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 235 {
 236         union wpa_event_data data;
 237
 238         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 239                    custom);
 240
 241         os_memset(&data, 0, sizeof(data));
 242         /* Host AP driver */
 243         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 244                 data.michael_mic_failure.unicast =
 245                         os_strstr(custom, " unicast ") != NULL;
 246                 /* TODO: parse parameters(?) */
 247                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 248         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 249                 char *spos;
 250                 int bytes;
 251                 u8 *req_ies = NULL, *resp_ies = NULL;
 252
 253                 spos = custom + 17;
 254
 255                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 256                 if (!bytes || (bytes & 1))
 257                         return;
 258                 bytes /= 2;
 259
 260                 req_ies = os_malloc(bytes);
 261                 if (req_ies == NULL ||
 262                     hexstr2bin(spos, req_ies, bytes) < 0)
 263                         goto done;
 264                 data.assoc_info.req_ies = req_ies;
 265                 data.assoc_info.req_ies_len = bytes;
 266
 267                 spos += bytes * 2;
 268
 269                 data.assoc_info.resp_ies = NULL;
 270                 data.assoc_info.resp_ies_len = 0;
 271
 272                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 273                         spos += 9;
 274
 275                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 276                         if (!bytes || (bytes & 1))
 277                                 goto done;
 278                         bytes /= 2;
 279
 280                         resp_ies = os_malloc(bytes);
 281                         if (resp_ies == NULL ||
 282                             hexstr2bin(spos, resp_ies, bytes) < 0)
 283                                 goto done;
 284                         data.assoc_info.resp_ies = resp_ies;
 285                         data.assoc_info.resp_ies_len = bytes;
 286                 }
 287
 288                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 289
 290         done:
 291                 os_free(resp_ies);
 292                 os_free(req_ies);
 293 #ifdef CONFIG_PEERKEY
 294         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 295                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 296                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 297                                    "STKSTART.request '%s'", custom + 17);
 298                         return;
 299                 }
 300                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 301 #endif /* CONFIG_PEERKEY */
 302         }
 303 }
 304
 305
 306 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 307         void *ctx, const char *ev, size_t len)
 308 {
 309         const struct iw_michaelmicfailure *mic;
 310         union wpa_event_data data;
 311
 312         if (len < sizeof(*mic))
 313                 return -1;
 314
 315         mic = (const struct iw_michaelmicfailure *) ev;
 316
 317         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 318                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 319                    MAC2STR(mic->src_addr.sa_data));
 320
 321         os_memset(&data, 0, sizeof(data));
 322         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 323         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 324
 325         return 0;
 326 }
 327
 328
 329 static int wpa_driver_wext_event_wireless_pmkidcand(
 330         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 331 {
 332         const struct iw_pmkid_cand *cand;
 333         union wpa_event_data data;
 334         const u8 *addr;
 335
 336         if (len < sizeof(*cand))
 337                 return -1;
 338
 339         cand = (const struct iw_pmkid_cand *) ev;
 340         addr = (const u8 *) cand->bssid.sa_data;
 341
 342         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 343                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 344                    cand->index, MAC2STR(addr));
 345
 346         os_memset(&data, 0, sizeof(data));
 347         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 348         data.pmkid_candidate.index = cand->index;
 349         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 350         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 351
 352         return 0;
 353 }
 354
 355
 356 static int wpa_driver_wext_event_wireless_assocreqie(
 357         struct wpa_driver_wext_data *drv, const char *ev, int len)
 358 {
 359         if (len < 0)
 360                 return -1;
 361
 362         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 363                     len);
 364         os_free(drv->assoc_req_ies);
 365         drv->assoc_req_ies = os_malloc(len);
 366         if (drv->assoc_req_ies == NULL) {
 367                 drv->assoc_req_ies_len = 0;
 368                 return -1;
 369         }
 370         os_memcpy(drv->assoc_req_ies, ev, len);
 371         drv->assoc_req_ies_len = len;
 372
 373         return 0;
 374 }
 375
 376
 377 static int wpa_driver_wext_event_wireless_assocrespie(
 378         struct wpa_driver_wext_data *drv, const char *ev, int len)
 379 {
 380         if (len < 0)
 381                 return -1;
 382
 383         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 384                     len);
 385         os_free(drv->assoc_resp_ies);
 386         drv->assoc_resp_ies = os_malloc(len);
 387         if (drv->assoc_resp_ies == NULL) {
 388                 drv->assoc_resp_ies_len = 0;
 389                 return -1;
 390         }
 391         os_memcpy(drv->assoc_resp_ies, ev, len);
 392         drv->assoc_resp_ies_len = len;
 393
 394         return 0;
 395 }
 396
 397
 398 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 399 {
 400         union wpa_event_data data;
 401
 402         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 403                 return;
 404
 405         os_memset(&data, 0, sizeof(data));
 406         if (drv->assoc_req_ies) {
 407                 data.assoc_info.req_ies = drv->assoc_req_ies;
 408                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 409         }
 410         if (drv->assoc_resp_ies) {
 411                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 412                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 413         }
 414
 415         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 416
 417         os_free(drv->assoc_req_ies);
 418         drv->assoc_req_ies = NULL;
 419         os_free(drv->assoc_resp_ies);
 420         drv->assoc_resp_ies = NULL;
 421 }
 422
 423
 424 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 425                                            char *data, unsigned int len)
 426 {
 427         struct iw_event iwe_buf, *iwe = &iwe_buf;
 428         char *pos, *end, *custom, *buf;
 429
 430         pos = data;
 431         end = data + len;
 432
 433         while ((size_t) (end - pos) >= IW_EV_LCP_LEN) {
 434                 /* Event data may be unaligned, so make a local, aligned copy
 435                  * before processing. */
 436                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 437                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 438                            iwe->cmd, iwe->len);
 439                 if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos)
 440                         return;
 441
 442                 custom = pos + IW_EV_POINT_LEN;
 443                 if (drv->we_version_compiled > 18 &&
 444                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 445                      iwe->cmd == IWEVCUSTOM ||
 446                      iwe->cmd == IWEVASSOCREQIE ||
 447                      iwe->cmd == IWEVASSOCRESPIE ||
 448                      iwe->cmd == IWEVPMKIDCAND)) {
 449                         /* WE-19 removed the pointer from struct iw_point */
 450                         char *dpos = (char *) &iwe_buf.u.data.length;
 451                         int dlen = dpos - (char *) &iwe_buf;
 452                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 453                                   sizeof(struct iw_event) - dlen);
 454                 } else {
 455                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 456                         custom += IW_EV_POINT_OFF;
 457                 }
 458
 459                 switch (iwe->cmd) {
 460                 case SIOCGIWAP:
 461                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 462                                    MACSTR,
 463                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 464                         if (is_zero_ether_addr(
 465                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 466                             os_memcmp(iwe->u.ap_addr.sa_data,
 467                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 468                             0) {
 469                                 os_free(drv->assoc_req_ies);
 470                                 drv->assoc_req_ies = NULL;
 471                                 os_free(drv->assoc_resp_ies);
 472                                 drv->assoc_resp_ies = NULL;
 473                                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC,
 474                                                      NULL);
 475
 476                         } else {
 477                                 wpa_driver_wext_event_assoc_ies(drv);
 478                                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC,
 479                                                      NULL);
 480                         }
 481                         break;
 482                 case IWEVMICHAELMICFAILURE:
 483                         if (iwe->u.data.length > end - custom) {
 484                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 485                                            "IWEVMICHAELMICFAILURE length");
 486                                 return;
 487                         }
 488                         wpa_driver_wext_event_wireless_michaelmicfailure(
 489                                 drv->ctx, custom, iwe->u.data.length);
 490                         break;
 491                 case IWEVCUSTOM:
 492                         if (iwe->u.data.length > end - custom) {
 493                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 494                                            "IWEVCUSTOM length");
 495                                 return;
 496                         }
 497                         buf = dup_binstr(custom, iwe->u.data.length);
 498                         if (buf == NULL)
 499                                 return;
 500                         wpa_driver_wext_event_wireless_custom(drv->ctx, buf);
 501                         os_free(buf);
 502                         break;
 503                 case SIOCGIWSCAN:
 504                         drv->scan_complete_events = 1;
 505                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 506                                              drv, drv->ctx);
 507                         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS,
 508                                              NULL);
 509                         break;
 510                 case IWEVASSOCREQIE:
 511                         if (iwe->u.data.length > end - custom) {
 512                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 513                                            "IWEVASSOCREQIE length");
 514                                 return;
 515                         }
 516                         wpa_driver_wext_event_wireless_assocreqie(
 517                                 drv, custom, iwe->u.data.length);
 518                         break;
 519                 case IWEVASSOCRESPIE:
 520                         if (iwe->u.data.length > end - custom) {
 521                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 522                                            "IWEVASSOCRESPIE length");
 523                                 return;
 524                         }
 525                         wpa_driver_wext_event_wireless_assocrespie(
 526                                 drv, custom, iwe->u.data.length);
 527                         break;
 528                 case IWEVPMKIDCAND:
 529                         if (iwe->u.data.length > end - custom) {
 530                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 531                                            "IWEVPMKIDCAND length");
 532                                 return;
 533                         }
 534                         wpa_driver_wext_event_wireless_pmkidcand(
 535                                 drv, custom, iwe->u.data.length);
 536                         break;
 537                 }
 538
 539                 pos += iwe->len;
 540         }
 541 }
 542
 543
 544 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 545                                        char *buf, size_t len, int del)
 546 {
 547         union wpa_event_data event;
 548
 549         os_memset(&event, 0, sizeof(event));
 550         if (len > sizeof(event.interface_status.ifname))
 551                 len = sizeof(event.interface_status.ifname) - 1;
 552         os_memcpy(event.interface_status.ifname, buf, len);
 553         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 554                 EVENT_INTERFACE_ADDED;
 555
 556         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 557                    del ? "DEL" : "NEW",
 558                    event.interface_status.ifname,
 559                    del ? "removed" : "added");
 560
 561         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 562                 if (del) {
 563                         if (drv->if_removed) {
 564                                 wpa_printf(MSG_DEBUG, "WEXT: if_removed "
 565                                            "already set - ignore event");
 566                                 return;
 567                         }
 568                         drv->if_removed = 1;
 569                 } else {
 570                         if (if_nametoindex(drv->ifname) == 0) {
 571                                 wpa_printf(MSG_DEBUG, "WEXT: Interface %s "
 572                                            "does not exist - ignore "
 573                                            "RTM_NEWLINK",
 574                                            drv->ifname);
 575                                 return;
 576                         }
 577                         if (!drv->if_removed) {
 578                                 wpa_printf(MSG_DEBUG, "WEXT: if_removed "
 579                                            "already cleared - ignore event");
 580                                 return;
 581                         }
 582                         drv->if_removed = 0;
 583                 }
 584         }
 585
 586         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 587 }
 588
 589
 590 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 591                                       u8 *buf, size_t len)
 592 {
 593         int attrlen, rta_len;
 594         struct rtattr *attr;
 595
 596         attrlen = len;
 597         attr = (struct rtattr *) buf;
 598
 599         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 600         while (RTA_OK(attr, attrlen)) {
 601                 if (attr->rta_type == IFLA_IFNAME) {
 602                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 603                             == 0)
 604                                 return 1;
 605                         else
 606                                 break;
 607                 }
 608                 attr = RTA_NEXT(attr, attrlen);
 609         }
 610
 611         return 0;
 612 }
 613
 614
 615 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 616                                        int ifindex, u8 *buf, size_t len)
 617 {
 618         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 619                 return 1;
 620
 621         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, buf, len)) {
 622                 drv->ifindex = if_nametoindex(drv->ifname);
 623                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 624                            "interface");
 625                 wpa_driver_wext_finish_drv_init(drv);
 626                 return 1;
 627         }
 628
 629         return 0;
 630 }
 631
 632
 633 static void wpa_driver_wext_event_rtm_newlink(void *ctx, struct ifinfomsg *ifi,
 634                                               u8 *buf, size_t len)
 635 {
 636         struct wpa_driver_wext_data *drv = ctx;
 637         int attrlen, rta_len;
 638         struct rtattr *attr;
 639         char namebuf[IFNAMSIZ];
 640
 641         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 642                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 643                            ifi->ifi_index);
 644                 return;
 645         }
 646
 647         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 648                    "(%s%s%s%s)",
 649                    drv->operstate, ifi->ifi_flags,
 650                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 651                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 652                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 653                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 654
 655         if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
 656                 wpa_printf(MSG_DEBUG, "WEXT: Interface down");
 657                 drv->if_disabled = 1;
 658                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
 659         }
 660
 661         if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
 662                 if (if_indextoname(ifi->ifi_index, namebuf) &&
 663                     linux_iface_up(drv->ioctl_sock, drv->ifname) == 0) {
 664                         wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
 665                                    "event since interface %s is down",
 666                                    namebuf);
 667                 } else if (if_nametoindex(drv->ifname) == 0) {
 668                         wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
 669                                    "event since interface %s does not exist",
 670                                    drv->ifname);
 671                 } else if (drv->if_removed) {
 672                         wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
 673                                    "event since interface %s is marked "
 674                                    "removed", drv->ifname);
 675                 } else {
 676                         wpa_printf(MSG_DEBUG, "WEXT: Interface up");
 677                         drv->if_disabled = 0;
 678                         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED,
 679                                              NULL);
 680                 }
 681         }
 682
 683         /*
 684          * Some drivers send the association event before the operup event--in
 685          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 686          * fails. This will hit us when wpa_supplicant does not need to do
 687          * IEEE 802.1X authentication
 688          */
 689         if (drv->operstate == 1 &&
 690             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 691             !(ifi->ifi_flags & IFF_RUNNING))
 692                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 693                                        -1, IF_OPER_UP);
 694
 695         attrlen = len;
 696         attr = (struct rtattr *) buf;
 697
 698         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 699         while (RTA_OK(attr, attrlen)) {
 700                 if (attr->rta_type == IFLA_WIRELESS) {
 701                         wpa_driver_wext_event_wireless(
 702                                 drv, ((char *) attr) + rta_len,
 703                                 attr->rta_len - rta_len);
 704                 } else if (attr->rta_type == IFLA_IFNAME) {
 705                         wpa_driver_wext_event_link(drv,
 706                                                    ((char *) attr) + rta_len,
 707                                                    attr->rta_len - rta_len, 0);
 708                 }
 709                 attr = RTA_NEXT(attr, attrlen);
 710         }
 711 }
 712
 713
 714 static void wpa_driver_wext_event_rtm_dellink(void *ctx, struct ifinfomsg *ifi,
 715                                               u8 *buf, size_t len)
 716 {
 717         struct wpa_driver_wext_data *drv = ctx;
 718         int attrlen, rta_len;
 719         struct rtattr *attr;
 720
 721         attrlen = len;
 722         attr = (struct rtattr *) buf;
 723
 724         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 725         while (RTA_OK(attr, attrlen)) {
 726                 if (attr->rta_type == IFLA_IFNAME) {
 727                         wpa_driver_wext_event_link(drv,
 728                                                    ((char *) attr) + rta_len,
 729                                                    attr->rta_len - rta_len, 1);
 730                 }
 731                 attr = RTA_NEXT(attr, attrlen);
 732         }
 733 }
 734
 735
 736 static void wpa_driver_wext_rfkill_blocked(void *ctx)
 737 {
 738         wpa_printf(MSG_DEBUG, "WEXT: RFKILL blocked");
 739         /*
 740          * This may be for any interface; use ifdown event to disable
 741          * interface.
 742          */
 743 }
 744
 745
 746 static void wpa_driver_wext_rfkill_unblocked(void *ctx)
 747 {
 748         struct wpa_driver_wext_data *drv = ctx;
 749         wpa_printf(MSG_DEBUG, "WEXT: RFKILL unblocked");
 750         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
 751                 wpa_printf(MSG_DEBUG, "WEXT: Could not set interface UP "
 752                            "after rfkill unblock");
 753                 return;
 754         }
 755         /* rtnetlink ifup handler will report interface as enabled */
 756 }
 757
 758
 759 static void wext_get_phy_name(struct wpa_driver_wext_data *drv)
 760 {
 761         /* Find phy (radio) to which this interface belongs */
 762         char buf[90], *pos;
 763         int f, rv;
 764
 765         drv->phyname[0] = '\0';
 766         snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
 767                  drv->ifname);
 768         f = open(buf, O_RDONLY);
 769         if (f < 0) {
 770                 wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
 771                            buf, strerror(errno));
 772                 return;
 773         }
 774
 775         rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
 776         close(f);
 777         if (rv < 0) {
 778                 wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
 779                            buf, strerror(errno));
 780                 return;
 781         }
 782
 783         drv->phyname[rv] = '\0';
 784         pos = os_strchr(drv->phyname, '\n');
 785         if (pos)
 786                 *pos = '\0';
 787         wpa_printf(MSG_DEBUG, "wext: interface %s phy: %s",
 788                    drv->ifname, drv->phyname);
 789 }
 790
 791
 792 /**
 793  * wpa_driver_wext_init - Initialize WE driver interface
 794  * @ctx: context to be used when calling wpa_supplicant functions,
 795  * e.g., wpa_supplicant_event()
 796  * @ifname: interface name, e.g., wlan0
 797  * Returns: Pointer to private data, %NULL on failure
 798  */
 799 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 800 {
 801         struct wpa_driver_wext_data *drv;
 802         struct netlink_config *cfg;
 803         struct rfkill_config *rcfg;
 804         char path[128];
 805         struct stat buf;
 806
 807         drv = os_zalloc(sizeof(*drv));
 808         if (drv == NULL)
 809                 return NULL;
 810         drv->ctx = ctx;
 811         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 812
 813         os_snprintf(path, sizeof(path), "/sys/class/net/%s/phy80211", ifname);
 814         if (stat(path, &buf) == 0) {
 815                 wpa_printf(MSG_DEBUG, "WEXT: cfg80211-based driver detected");
 816                 drv->cfg80211 = 1;
 817                 wext_get_phy_name(drv);
 818         }
 819
 820         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 821         if (drv->ioctl_sock < 0) {
 822                 wpa_printf(MSG_ERROR, "socket(PF_INET,SOCK_DGRAM): %s",
 823                            strerror(errno));
 824                 goto err1;
 825         }
 826
 827         cfg = os_zalloc(sizeof(*cfg));
 828         if (cfg == NULL)
 829                 goto err1;
 830         cfg->ctx = drv;
 831         cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink;
 832         cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink;
 833         drv->netlink = netlink_init(cfg);
 834         if (drv->netlink == NULL) {
 835                 os_free(cfg);
 836                 goto err2;
 837         }
 838
 839         rcfg = os_zalloc(sizeof(*rcfg));
 840         if (rcfg == NULL)
 841                 goto err3;
 842         rcfg->ctx = drv;
 843         os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
 844         rcfg->blocked_cb = wpa_driver_wext_rfkill_blocked;
 845         rcfg->unblocked_cb = wpa_driver_wext_rfkill_unblocked;
 846         drv->rfkill = rfkill_init(rcfg);
 847         if (drv->rfkill == NULL) {
 848                 wpa_printf(MSG_DEBUG, "WEXT: RFKILL status not available");
 849                 os_free(rcfg);
 850         }
 851
 852         drv->mlme_sock = -1;
 853
 854         if (wpa_driver_wext_finish_drv_init(drv) < 0)
 855                 goto err3;
 856
 857         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1);
 858
 859         return drv;
 860
 861 err3:
 862         rfkill_deinit(drv->rfkill);
 863         netlink_deinit(drv->netlink);
 864 err2:
 865         close(drv->ioctl_sock);
 866 err1:
 867         os_free(drv);
 868         return NULL;
 869 }
 870
 871
 872 static void wpa_driver_wext_send_rfkill(void *eloop_ctx, void *timeout_ctx)
 873 {
 874         wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
 875 }
 876
 877
 878 static int wext_hostap_ifname(struct wpa_driver_wext_data *drv,
 879                               const char *ifname)
 880 {
 881         char buf[200], *res;
 882         int type;
 883         FILE *f;
 884
 885         if (strcmp(ifname, ".") == 0 || strcmp(ifname, "..") == 0)
 886                 return -1;
 887
 888         snprintf(buf, sizeof(buf), "/sys/class/net/%s/device/net/%s/type",
 889                  drv->ifname, ifname);
 890
 891         f = fopen(buf, "r");
 892         if (!f)
 893                 return -1;
 894         res = fgets(buf, sizeof(buf), f);
 895         fclose(f);
 896
 897         type = res ? atoi(res) : -1;
 898         wpa_printf(MSG_DEBUG, "WEXT: hostap ifname %s type %d", ifname, type);
 899
 900         if (type == ARPHRD_IEEE80211) {
 901                 wpa_printf(MSG_DEBUG,
 902                            "WEXT: Found hostap driver wifi# interface (%s)",
 903                            ifname);
 904                 wpa_driver_wext_alternative_ifindex(drv, ifname);
 905                 return 0;
 906         }
 907         return -1;
 908 }
 909
 910
 911 static int wext_add_hostap(struct wpa_driver_wext_data *drv)
 912 {
 913         char buf[200];
 914         int n;
 915         struct dirent **names;
 916         int ret = -1;
 917
 918         snprintf(buf, sizeof(buf), "/sys/class/net/%s/device/net", drv->ifname);
 919         n = scandir(buf, &names, NULL, alphasort);
 920         if (n < 0)
 921                 return -1;
 922
 923         while (n--) {
 924                 if (ret < 0 && wext_hostap_ifname(drv, names[n]->d_name) == 0)
 925                         ret = 0;
 926                 free(names[n]);
 927         }
 928         free(names);
 929
 930         return ret;
 931 }
 932
 933
 934 static void wext_check_hostap(struct wpa_driver_wext_data *drv)
 935 {
 936         char buf[200], *pos;
 937         ssize_t res;
 938
 939         /*
 940          * Host AP driver may use both wlan# and wifi# interface in wireless
 941          * events. Since some of the versions included WE-18 support, let's add
 942          * the alternative ifindex also from driver_wext.c for the time being.
 943          * This may be removed at some point once it is believed that old
 944          * versions of the driver are not in use anymore. However, it looks like
 945          * the wifi# interface is still used in the current kernel tree, so it
 946          * may not really be possible to remove this before the Host AP driver
 947          * gets removed from the kernel.
 948          */
 949
 950         /* First, try to see if driver information is available from sysfs */
 951         snprintf(buf, sizeof(buf), "/sys/class/net/%s/device/driver",
 952                  drv->ifname);
 953         res = readlink(buf, buf, sizeof(buf) - 1);
 954         if (res > 0) {
 955                 buf[res] = '\0';
 956                 pos = strrchr(buf, '/');
 957                 if (pos)
 958                         pos++;
 959                 else
 960                         pos = buf;
 961                 wpa_printf(MSG_DEBUG, "WEXT: Driver: %s", pos);
 962                 if (os_strncmp(pos, "hostap", 6) == 0 &&
 963                     wext_add_hostap(drv) == 0)
 964                         return;
 965         }
 966
 967         /* Second, use the old design with hardcoded ifname */
 968         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
 969                 char ifname2[IFNAMSIZ + 1];
 970                 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
 971                 os_memcpy(ifname2, "wifi", 4);
 972                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
 973         }
 974 }
 975
 976
 977 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
 978 {
 979         int send_rfkill_event = 0;
 980
 981         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1) < 0) {
 982                 if (rfkill_is_blocked(drv->rfkill)) {
 983                         wpa_printf(MSG_DEBUG, "WEXT: Could not yet enable "
 984                                    "interface '%s' due to rfkill",
 985                                    drv->ifname);
 986                         drv->if_disabled = 1;
 987                         send_rfkill_event = 1;
 988                 } else {
 989                         wpa_printf(MSG_ERROR, "WEXT: Could not set "
 990                                    "interface '%s' UP", drv->ifname);
 991                         return -1;
 992                 }
 993         }
 994
 995         /*
 996          * Make sure that the driver does not have any obsolete PMKID entries.
 997          */
 998         wpa_driver_wext_flush_pmkid(drv);
 999
1000         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
1001                 wpa_printf(MSG_DEBUG, "Could not configure driver to use "
1002                            "managed mode");
1003                 /* Try to use it anyway */
1004         }
1005
1006         wpa_driver_wext_get_range(drv);
1007
1008         /*
1009          * Unlock the driver's BSSID and force to a random SSID to clear any
1010          * previous association the driver might have when the supplicant
1011          * starts up.
1012          */
1013         wpa_driver_wext_disconnect(drv);
1014
1015         drv->ifindex = if_nametoindex(drv->ifname);
1016
1017         wext_check_hostap(drv);
1018
1019         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1020                                1, IF_OPER_DORMANT);
1021
1022         if (send_rfkill_event) {
1023                 eloop_register_timeout(0, 0, wpa_driver_wext_send_rfkill,
1024                                        drv, drv->ctx);
1025         }
1026
1027         return 0;
1028 }
1029
1030
1031 /**
1032  * wpa_driver_wext_deinit - Deinitialize WE driver interface
1033  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1034  *
1035  * Shut down driver interface and processing of driver events. Free
1036  * private data buffer if one was allocated in wpa_driver_wext_init().
1037  */
1038 void wpa_driver_wext_deinit(void *priv)
1039 {
1040         struct wpa_driver_wext_data *drv = priv;
1041
1042         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
1043
1044         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1045
1046         /*
1047          * Clear possibly configured driver parameters in order to make it
1048          * easier to use the driver after wpa_supplicant has been terminated.
1049          */
1050         wpa_driver_wext_disconnect(drv);
1051
1052         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1053         netlink_deinit(drv->netlink);
1054         rfkill_deinit(drv->rfkill);
1055
1056         if (drv->mlme_sock >= 0)
1057                 eloop_unregister_read_sock(drv->mlme_sock);
1058
1059         (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
1060
1061         close(drv->ioctl_sock);
1062         if (drv->mlme_sock >= 0)
1063                 close(drv->mlme_sock);
1064         os_free(drv->assoc_req_ies);
1065         os_free(drv->assoc_resp_ies);
1066         os_free(drv);
1067 }
1068
1069
1070 /**
1071  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1072  * @eloop_ctx: Unused
1073  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1074  *
1075  * This function can be used as registered timeout when starting a scan to
1076  * generate a scan completed event if the driver does not report this.
1077  */
1078 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1079 {
1080         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1081         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1082 }
1083
1084
1085 /**
1086  * wpa_driver_wext_scan - Request the driver to initiate scan
1087  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1088  * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
1089  * Returns: 0 on success, -1 on failure
1090  */
1091 int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
1092 {
1093         struct wpa_driver_wext_data *drv = priv;
1094         struct iwreq iwr;
1095         int ret = 0, timeout;
1096         struct iw_scan_req req;
1097         const u8 *ssid = params->ssids[0].ssid;
1098         size_t ssid_len = params->ssids[0].ssid_len;
1099
1100         if (ssid_len > IW_ESSID_MAX_SIZE) {
1101                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1102                            __FUNCTION__, (unsigned long) ssid_len);
1103                 return -1;
1104         }
1105
1106         os_memset(&iwr, 0, sizeof(iwr));
1107         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1108
1109         if (ssid && ssid_len) {
1110                 os_memset(&req, 0, sizeof(req));
1111                 req.essid_len = ssid_len;
1112                 req.bssid.sa_family = ARPHRD_ETHER;
1113                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1114                 os_memcpy(req.essid, ssid, ssid_len);
1115                 iwr.u.data.pointer = (caddr_t) &req;
1116                 iwr.u.data.length = sizeof(req);
1117                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1118         }
1119
1120         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1121                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWSCAN]: %s",
1122                            strerror(errno));
1123                 ret = -1;
1124         }
1125
1126         /* Not all drivers generate "scan completed" wireless event, so try to
1127          * read results after a timeout. */
1128         timeout = 10;
1129         if (drv->scan_complete_events) {
1130                 /*
1131                  * The driver seems to deliver SIOCGIWSCAN events to notify
1132                  * when scan is complete, so use longer timeout to avoid race
1133                  * conditions with scanning and following association request.
1134                  */
1135                 timeout = 30;
1136         }
1137         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1138                    "seconds", ret, timeout);
1139         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1140         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1141                                drv->ctx);
1142
1143         return ret;
1144 }
1145
1146
1147 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1148                                     size_t *len)
1149 {
1150         struct iwreq iwr;
1151         u8 *res_buf;
1152         size_t res_buf_len;
1153
1154         res_buf_len = IW_SCAN_MAX_DATA;
1155         for (;;) {
1156                 res_buf = os_malloc(res_buf_len);
1157                 if (res_buf == NULL)
1158                         return NULL;
1159                 os_memset(&iwr, 0, sizeof(iwr));
1160                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1161                 iwr.u.data.pointer = res_buf;
1162                 iwr.u.data.length = res_buf_len;
1163
1164                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1165                         break;
1166
1167                 if (errno == E2BIG && res_buf_len < 65535) {
1168                         os_free(res_buf);
1169                         res_buf = NULL;
1170                         res_buf_len *= 2;
1171                         if (res_buf_len > 65535)
1172                                 res_buf_len = 65535; /* 16-bit length field */
1173                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1174                                    "trying larger buffer (%lu bytes)",
1175                                    (unsigned long) res_buf_len);
1176                 } else {
1177                         wpa_printf(MSG_ERROR, "ioctl[SIOCGIWSCAN]: %s",
1178                                    strerror(errno));
1179                         os_free(res_buf);
1180                         return NULL;
1181                 }
1182         }
1183
1184         if (iwr.u.data.length > res_buf_len) {
1185                 os_free(res_buf);
1186                 return NULL;
1187         }
1188         *len = iwr.u.data.length;
1189
1190         return res_buf;
1191 }
1192
1193
1194 /*
1195  * Data structure for collecting WEXT scan results. This is needed to allow
1196  * the various methods of reporting IEs to be combined into a single IE buffer.
1197  */
1198 struct wext_scan_data {
1199         struct wpa_scan_res res;
1200         u8 *ie;
1201         size_t ie_len;
1202         u8 ssid[SSID_MAX_LEN];
1203         size_t ssid_len;
1204         int maxrate;
1205 };
1206
1207
1208 static void wext_get_scan_mode(struct iw_event *iwe,
1209                                struct wext_scan_data *res)
1210 {
1211         if (iwe->u.mode == IW_MODE_ADHOC)
1212                 res->res.caps |= IEEE80211_CAP_IBSS;
1213         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1214                 res->res.caps |= IEEE80211_CAP_ESS;
1215 }
1216
1217
1218 static void wext_get_scan_ssid(struct iw_event *iwe,
1219                                struct wext_scan_data *res, char *custom,
1220                                char *end)
1221 {
1222         int ssid_len = iwe->u.essid.length;
1223         if (ssid_len > end - custom)
1224                 return;
1225         if (iwe->u.essid.flags &&
1226             ssid_len > 0 &&
1227             ssid_len <= IW_ESSID_MAX_SIZE) {
1228                 os_memcpy(res->ssid, custom, ssid_len);
1229                 res->ssid_len = ssid_len;
1230         }
1231 }
1232
1233
1234 static void wext_get_scan_freq(struct iw_event *iwe,
1235                                struct wext_scan_data *res)
1236 {
1237         int divi = 1000000, i;
1238
1239         if (iwe->u.freq.e == 0) {
1240                 /*
1241                  * Some drivers do not report frequency, but a channel.
1242                  * Try to map this to frequency by assuming they are using
1243                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1244                  * frequency if the driver sends both frequency and channel,
1245                  * since the driver may be sending an A-band channel that we
1246                  * don't handle here.
1247                  */
1248
1249                 if (res->res.freq)
1250                         return;
1251
1252                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1253                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1254                         return;
1255                 } else if (iwe->u.freq.m == 14) {
1256                         res->res.freq = 2484;
1257                         return;
1258                 }
1259         }
1260
1261         if (iwe->u.freq.e > 6) {
1262                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1263                            MACSTR " m=%d e=%d)",
1264                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1265                            iwe->u.freq.e);
1266                 return;
1267         }
1268
1269         for (i = 0; i < iwe->u.freq.e; i++)
1270                 divi /= 10;
1271         res->res.freq = iwe->u.freq.m / divi;
1272 }
1273
1274
1275 static void wext_get_scan_qual(struct wpa_driver_wext_data *drv,
1276                                struct iw_event *iwe,
1277                                struct wext_scan_data *res)
1278 {
1279         res->res.qual = iwe->u.qual.qual;
1280         res->res.noise = iwe->u.qual.noise;
1281         res->res.level = iwe->u.qual.level;
1282         if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
1283                 res->res.flags |= WPA_SCAN_QUAL_INVALID;
1284         if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
1285                 res->res.flags |= WPA_SCAN_LEVEL_INVALID;
1286         if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
1287                 res->res.flags |= WPA_SCAN_NOISE_INVALID;
1288         if (iwe->u.qual.updated & IW_QUAL_DBM)
1289                 res->res.flags |= WPA_SCAN_LEVEL_DBM;
1290         if ((iwe->u.qual.updated & IW_QUAL_DBM) ||
1291             ((iwe->u.qual.level != 0) &&
1292              (iwe->u.qual.level > drv->max_level))) {
1293                 if (iwe->u.qual.level >= 64)
1294                         res->res.level -= 0x100;
1295                 if (iwe->u.qual.noise >= 64)
1296                         res->res.noise -= 0x100;
1297         }
1298 }
1299
1300
1301 static void wext_get_scan_encode(struct iw_event *iwe,
1302                                  struct wext_scan_data *res)
1303 {
1304         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1305                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1306 }
1307
1308
1309 static void wext_get_scan_rate(struct iw_event *iwe,
1310                                struct wext_scan_data *res, char *pos,
1311                                char *end)
1312 {
1313         int maxrate;
1314         char *custom = pos + IW_EV_LCP_LEN;
1315         struct iw_param p;
1316         size_t clen;
1317
1318         clen = iwe->len;
1319         if (clen > (size_t) (end - custom))
1320                 return;
1321         maxrate = 0;
1322         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1323                 /* Note: may be misaligned, make a local, aligned copy */
1324                 os_memcpy(&p, custom, sizeof(struct iw_param));
1325                 if (p.value > maxrate)
1326                         maxrate = p.value;
1327                 clen -= sizeof(struct iw_param);
1328                 custom += sizeof(struct iw_param);
1329         }
1330
1331         /* Convert the maxrate from WE-style (b/s units) to
1332          * 802.11 rates (500000 b/s units).
1333          */
1334         res->maxrate = maxrate / 500000;
1335 }
1336
1337
1338 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1339                                     struct wext_scan_data *res, char *custom,
1340                                     char *end)
1341 {
1342         char *genie, *gpos, *gend;
1343         u8 *tmp;
1344
1345         if (iwe->u.data.length == 0)
1346                 return;
1347
1348         gpos = genie = custom;
1349         gend = genie + iwe->u.data.length;
1350         if (gend > end) {
1351                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1352                 return;
1353         }
1354
1355         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1356         if (tmp == NULL)
1357                 return;
1358         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1359         res->ie = tmp;
1360         res->ie_len += gend - gpos;
1361 }
1362
1363
1364 static void wext_get_scan_custom(struct iw_event *iwe,
1365                                  struct wext_scan_data *res, char *custom,
1366                                  char *end)
1367 {
1368         size_t clen;
1369         u8 *tmp;
1370
1371         clen = iwe->u.data.length;
1372         if (clen > (size_t) (end - custom))
1373                 return;
1374
1375         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1376                 char *spos;
1377                 int bytes;
1378                 spos = custom + 7;
1379                 bytes = custom + clen - spos;
1380                 if (bytes & 1 || bytes == 0)
1381                         return;
1382                 bytes /= 2;
1383                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1384                 if (tmp == NULL)
1385                         return;
1386                 res->ie = tmp;
1387                 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1388                         return;
1389                 res->ie_len += bytes;
1390         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1391                 char *spos;
1392                 int bytes;
1393                 spos = custom + 7;
1394                 bytes = custom + clen - spos;
1395                 if (bytes & 1 || bytes == 0)
1396                         return;
1397                 bytes /= 2;
1398                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1399                 if (tmp == NULL)
1400                         return;
1401                 res->ie = tmp;
1402                 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1403                         return;
1404                 res->ie_len += bytes;
1405         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1406                 char *spos;
1407                 int bytes;
1408                 u8 bin[8];
1409                 spos = custom + 4;
1410                 bytes = custom + clen - spos;
1411                 if (bytes != 16) {
1412                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1413                         return;
1414                 }
1415                 bytes /= 2;
1416                 if (hexstr2bin(spos, bin, bytes) < 0) {
1417                         wpa_printf(MSG_DEBUG, "WEXT: Invalid TSF value");
1418                         return;
1419                 }
1420                 res->res.tsf += WPA_GET_BE64(bin);
1421         }
1422 }
1423
1424
1425 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1426 {
1427         return drv->we_version_compiled > 18 &&
1428                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1429                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1430 }
1431
1432
1433 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1434                                            struct wext_scan_data *data)
1435 {
1436         struct wpa_scan_res **tmp;
1437         struct wpa_scan_res *r;
1438         size_t extra_len;
1439         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1440
1441         /* Figure out whether we need to fake any IEs */
1442         pos = data->ie;
1443         end = pos + data->ie_len;
1444         while (pos && end - pos > 1) {
1445                 if (2 + pos[1] > end - pos)
1446                         break;
1447                 if (pos[0] == WLAN_EID_SSID)
1448                         ssid_ie = pos;
1449                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1450                         rate_ie = pos;
1451                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1452                         rate_ie = pos;
1453                 pos += 2 + pos[1];
1454         }
1455
1456         extra_len = 0;
1457         if (ssid_ie == NULL)
1458                 extra_len += 2 + data->ssid_len;
1459         if (rate_ie == NULL && data->maxrate)
1460                 extra_len += 3;
1461
1462         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1463         if (r == NULL)
1464                 return;
1465         os_memcpy(r, &data->res, sizeof(*r));
1466         r->ie_len = extra_len + data->ie_len;
1467         pos = (u8 *) (r + 1);
1468         if (ssid_ie == NULL) {
1469                 /*
1470                  * Generate a fake SSID IE since the driver did not report
1471                  * a full IE list.
1472                  */
1473                 *pos++ = WLAN_EID_SSID;
1474                 *pos++ = data->ssid_len;
1475                 os_memcpy(pos, data->ssid, data->ssid_len);
1476                 pos += data->ssid_len;
1477         }
1478         if (rate_ie == NULL && data->maxrate) {
1479                 /*
1480                  * Generate a fake Supported Rates IE since the driver did not
1481                  * report a full IE list.
1482                  */
1483                 *pos++ = WLAN_EID_SUPP_RATES;
1484                 *pos++ = 1;
1485                 *pos++ = data->maxrate;
1486         }
1487         if (data->ie)
1488                 os_memcpy(pos, data->ie, data->ie_len);
1489
1490         tmp = os_realloc_array(res->res, res->num + 1,
1491                                sizeof(struct wpa_scan_res *));
1492         if (tmp == NULL) {
1493                 os_free(r);
1494                 return;
1495         }
1496         tmp[res->num++] = r;
1497         res->res = tmp;
1498 }
1499
1500
1501 /**
1502  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1503  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1504  * Returns: Scan results on success, -1 on failure
1505  */
1506 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1507 {
1508         struct wpa_driver_wext_data *drv = priv;
1509         size_t len;
1510         int first;
1511         u8 *res_buf;
1512         struct iw_event iwe_buf, *iwe = &iwe_buf;
1513         char *pos, *end, *custom;
1514         struct wpa_scan_results *res;
1515         struct wext_scan_data data;
1516
1517         res_buf = wpa_driver_wext_giwscan(drv, &len);
1518         if (res_buf == NULL)
1519                 return NULL;
1520
1521         first = 1;
1522
1523         res = os_zalloc(sizeof(*res));
1524         if (res == NULL) {
1525                 os_free(res_buf);
1526                 return NULL;
1527         }
1528
1529         pos = (char *) res_buf;
1530         end = (char *) res_buf + len;
1531         os_memset(&data, 0, sizeof(data));
1532
1533         while ((size_t) (end - pos) >= IW_EV_LCP_LEN) {
1534                 /* Event data may be unaligned, so make a local, aligned copy
1535                  * before processing. */
1536                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1537                 if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos)
1538                         break;
1539
1540                 custom = pos + IW_EV_POINT_LEN;
1541                 if (wext_19_iw_point(drv, iwe->cmd)) {
1542                         /* WE-19 removed the pointer from struct iw_point */
1543                         char *dpos = (char *) &iwe_buf.u.data.length;
1544                         int dlen = dpos - (char *) &iwe_buf;
1545                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1546                                   sizeof(struct iw_event) - dlen);
1547                 } else {
1548                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1549                         custom += IW_EV_POINT_OFF;
1550                 }
1551
1552                 switch (iwe->cmd) {
1553                 case SIOCGIWAP:
1554                         if (!first)
1555                                 wpa_driver_wext_add_scan_entry(res, &data);
1556                         first = 0;
1557                         os_free(data.ie);
1558                         os_memset(&data, 0, sizeof(data));
1559                         os_memcpy(data.res.bssid,
1560                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1561                         break;
1562                 case SIOCGIWMODE:
1563                         wext_get_scan_mode(iwe, &data);
1564                         break;
1565                 case SIOCGIWESSID:
1566                         wext_get_scan_ssid(iwe, &data, custom, end);
1567                         break;
1568                 case SIOCGIWFREQ:
1569                         wext_get_scan_freq(iwe, &data);
1570                         break;
1571                 case IWEVQUAL:
1572                         wext_get_scan_qual(drv, iwe, &data);
1573                         break;
1574                 case SIOCGIWENCODE:
1575                         wext_get_scan_encode(iwe, &data);
1576                         break;
1577                 case SIOCGIWRATE:
1578                         wext_get_scan_rate(iwe, &data, pos, end);
1579                         break;
1580                 case IWEVGENIE:
1581                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1582                         break;
1583                 case IWEVCUSTOM:
1584                         wext_get_scan_custom(iwe, &data, custom, end);
1585                         break;
1586                 }
1587
1588                 pos += iwe->len;
1589         }
1590         os_free(res_buf);
1591         res_buf = NULL;
1592         if (!first)
1593                 wpa_driver_wext_add_scan_entry(res, &data);
1594         os_free(data.ie);
1595
1596         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1597                    (unsigned long) len, (unsigned long) res->num);
1598
1599         return res;
1600 }
1601
1602
1603 static int wpa_driver_wext_get_range(void *priv)
1604 {
1605         struct wpa_driver_wext_data *drv = priv;
1606         struct iw_range *range;
1607         struct iwreq iwr;
1608         int minlen;
1609         size_t buflen;
1610
1611         /*
1612          * Use larger buffer than struct iw_range in order to allow the
1613          * structure to grow in the future.
1614          */
1615         buflen = sizeof(struct iw_range) + 500;
1616         range = os_zalloc(buflen);
1617         if (range == NULL)
1618                 return -1;
1619
1620         os_memset(&iwr, 0, sizeof(iwr));
1621         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1622         iwr.u.data.pointer = (caddr_t) range;
1623         iwr.u.data.length = buflen;
1624
1625         minlen = ((char *) &range->enc_capa) - (char *) range +
1626                 sizeof(range->enc_capa);
1627
1628         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1629                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWRANGE]: %s",
1630                            strerror(errno));
1631                 os_free(range);
1632                 return -1;
1633         } else if (iwr.u.data.length >= minlen &&
1634                    range->we_version_compiled >= 18) {
1635                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1636                            "WE(source)=%d enc_capa=0x%x",
1637                            range->we_version_compiled,
1638                            range->we_version_source,
1639                            range->enc_capa);
1640                 drv->has_capability = 1;
1641                 drv->we_version_compiled = range->we_version_compiled;
1642                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1643                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1644                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1645                 }
1646                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1647                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1648                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1649                 }
1650                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1651                         WPA_DRIVER_CAPA_ENC_WEP104;
1652                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP128;
1653                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1654                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1655                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1656                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1657                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1658                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1659                 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1660                         WPA_DRIVER_AUTH_SHARED |
1661                         WPA_DRIVER_AUTH_LEAP;
1662                 drv->capa.max_scan_ssids = 1;
1663
1664                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1665                            "flags 0x%llx",
1666                            drv->capa.key_mgmt, drv->capa.enc,
1667                            (unsigned long long) drv->capa.flags);
1668         } else {
1669                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1670                            "assuming WPA is not supported");
1671         }
1672
1673         drv->max_level = range->max_qual.level;
1674
1675         os_free(range);
1676         return 0;
1677 }
1678
1679
1680 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1681                                    const u8 *psk)
1682 {
1683         struct iw_encode_ext *ext;
1684         struct iwreq iwr;
1685         int ret;
1686
1687         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1688
1689         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1690                 return 0;
1691
1692         if (!psk)
1693                 return 0;
1694
1695         os_memset(&iwr, 0, sizeof(iwr));
1696         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1697
1698         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1699         if (ext == NULL)
1700                 return -1;
1701
1702         iwr.u.encoding.pointer = (caddr_t) ext;
1703         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1704         ext->key_len = PMK_LEN;
1705         os_memcpy(&ext->key, psk, ext->key_len);
1706         ext->alg = IW_ENCODE_ALG_PMK;
1707
1708         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1709         if (ret < 0)
1710                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT] PMK: %s",
1711                            strerror(errno));
1712         os_free(ext);
1713
1714         return ret;
1715 }
1716
1717
1718 static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg,
1719                                        const u8 *addr, int key_idx,
1720                                        int set_tx, const u8 *seq,
1721                                        size_t seq_len,
1722                                        const u8 *key, size_t key_len)
1723 {
1724         struct wpa_driver_wext_data *drv = priv;
1725         struct iwreq iwr;
1726         int ret = 0;
1727         struct iw_encode_ext *ext;
1728
1729         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1730                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1731                            __FUNCTION__, (unsigned long) seq_len);
1732                 return -1;
1733         }
1734
1735         ext = os_zalloc(sizeof(*ext) + key_len);
1736         if (ext == NULL)
1737                 return -1;
1738         os_memset(&iwr, 0, sizeof(iwr));
1739         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1740         iwr.u.encoding.flags = key_idx + 1;
1741         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1742         if (alg == WPA_ALG_NONE)
1743                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1744         iwr.u.encoding.pointer = (caddr_t) ext;
1745         iwr.u.encoding.length = sizeof(*ext) + key_len;
1746
1747         if (addr == NULL || is_broadcast_ether_addr(addr))
1748                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1749         if (set_tx)
1750                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1751
1752         ext->addr.sa_family = ARPHRD_ETHER;
1753         if (addr)
1754                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1755         else
1756                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1757         if (key && key_len) {
1758                 os_memcpy(ext + 1, key, key_len);
1759                 ext->key_len = key_len;
1760         }
1761         switch (alg) {
1762         case WPA_ALG_NONE:
1763                 ext->alg = IW_ENCODE_ALG_NONE;
1764                 break;
1765         case WPA_ALG_WEP:
1766                 ext->alg = IW_ENCODE_ALG_WEP;
1767                 break;
1768         case WPA_ALG_TKIP:
1769                 ext->alg = IW_ENCODE_ALG_TKIP;
1770                 break;
1771         case WPA_ALG_CCMP:
1772                 ext->alg = IW_ENCODE_ALG_CCMP;
1773                 break;
1774         case WPA_ALG_PMK:
1775                 ext->alg = IW_ENCODE_ALG_PMK;
1776                 break;
1777 #ifdef CONFIG_IEEE80211W
1778         case WPA_ALG_IGTK:
1779                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1780                 break;
1781 #endif /* CONFIG_IEEE80211W */
1782         default:
1783                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1784                            __FUNCTION__, alg);
1785                 os_free(ext);
1786                 return -1;
1787         }
1788
1789         if (seq && seq_len) {
1790                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1791                 os_memcpy(ext->rx_seq, seq, seq_len);
1792         }
1793
1794         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1795                 ret = errno == EOPNOTSUPP ? -2 : -1;
1796                 if (errno == ENODEV) {
1797                         /*
1798                          * ndiswrapper seems to be returning incorrect error
1799                          * code.. */
1800                         ret = -2;
1801                 }
1802
1803                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT]: %s",
1804                            strerror(errno));
1805         }
1806
1807         os_free(ext);
1808         return ret;
1809 }
1810
1811
1812 /**
1813  * wpa_driver_wext_set_key - Configure encryption key
1814  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1815  * @priv: Private driver interface data
1816  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1817  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1818  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1819  *      broadcast/default keys
1820  * @key_idx: key index (0..3), usually 0 for unicast keys
1821  * @set_tx: Configure this key as the default Tx key (only used when
1822  *      driver does not support separate unicast/individual key
1823  * @seq: Sequence number/packet number, seq_len octets, the next
1824  *      packet number to be used for in replay protection; configured
1825  *      for Rx keys (in most cases, this is only used with broadcast
1826  *      keys and set to zero for unicast keys)
1827  * @seq_len: Length of the seq, depends on the algorithm:
1828  *      TKIP: 6 octets, CCMP: 6 octets
1829  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1830  *      8-byte Rx Mic Key
1831  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1832  *      TKIP: 32, CCMP: 16)
1833  * Returns: 0 on success, -1 on failure
1834  *
1835  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1836  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1837  */
1838 int wpa_driver_wext_set_key(const char *ifname, void *priv, enum wpa_alg alg,
1839                             const u8 *addr, int key_idx,
1840                             int set_tx, const u8 *seq, size_t seq_len,
1841                             const u8 *key, size_t key_len)
1842 {
1843         struct wpa_driver_wext_data *drv = priv;
1844         struct iwreq iwr;
1845         int ret = 0;
1846
1847         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1848                    "key_len=%lu",
1849                    __FUNCTION__, alg, key_idx, set_tx,
1850                    (unsigned long) seq_len, (unsigned long) key_len);
1851
1852         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1853                                           seq, seq_len, key, key_len);
1854         if (ret == 0)
1855                 return 0;
1856
1857         if (ret == -2 &&
1858             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1859                 wpa_printf(MSG_DEBUG, "Driver did not support "
1860                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1861                 ret = 0;
1862         } else {
1863                 wpa_printf(MSG_DEBUG, "Driver did not support "
1864                            "SIOCSIWENCODEEXT");
1865                 return ret;
1866         }
1867
1868         os_memset(&iwr, 0, sizeof(iwr));
1869         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1870         iwr.u.encoding.flags = key_idx + 1;
1871         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1872         if (alg == WPA_ALG_NONE)
1873                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1874         iwr.u.encoding.pointer = (caddr_t) key;
1875         iwr.u.encoding.length = key_len;
1876
1877         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1878                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]: %s",
1879                            strerror(errno));
1880                 ret = -1;
1881         }
1882
1883         if (set_tx && alg != WPA_ALG_NONE) {
1884                 os_memset(&iwr, 0, sizeof(iwr));
1885                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1886                 iwr.u.encoding.flags = key_idx + 1;
1887                 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1888                 iwr.u.encoding.pointer = (caddr_t) NULL;
1889                 iwr.u.encoding.length = 0;
1890                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1891                         wpa_printf(MSG_ERROR,
1892                                    "ioctl[SIOCSIWENCODE] (set_tx): %s",
1893                                    strerror(errno));
1894                         ret = -1;
1895                 }
1896         }
1897
1898         return ret;
1899 }
1900
1901
1902 static int wpa_driver_wext_set_countermeasures(void *priv,
1903                                                int enabled)
1904 {
1905         struct wpa_driver_wext_data *drv = priv;
1906         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1907         return wpa_driver_wext_set_auth_param(drv,
1908                                               IW_AUTH_TKIP_COUNTERMEASURES,
1909                                               enabled);
1910 }
1911
1912
1913 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1914                                                 int enabled)
1915 {
1916         struct wpa_driver_wext_data *drv = priv;
1917         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1918         drv->use_crypt = enabled;
1919         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1920                                               enabled);
1921 }
1922
1923
1924 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1925                                 const u8 *addr, int cmd, int reason_code)
1926 {
1927         struct iwreq iwr;
1928         struct iw_mlme mlme;
1929         int ret = 0;
1930
1931         os_memset(&iwr, 0, sizeof(iwr));
1932         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1933         os_memset(&mlme, 0, sizeof(mlme));
1934         mlme.cmd = cmd;
1935         mlme.reason_code = reason_code;
1936         mlme.addr.sa_family = ARPHRD_ETHER;
1937         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1938         iwr.u.data.pointer = (caddr_t) &mlme;
1939         iwr.u.data.length = sizeof(mlme);
1940
1941         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1942                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMLME]: %s",
1943                            strerror(errno));
1944                 ret = -1;
1945         }
1946
1947         return ret;
1948 }
1949
1950
1951 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
1952 {
1953         struct iwreq iwr;
1954         const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
1955         u8 ssid[SSID_MAX_LEN];
1956         int i;
1957
1958         /*
1959          * Only force-disconnect when the card is in infrastructure mode,
1960          * otherwise the driver might interpret the cleared BSSID and random
1961          * SSID as an attempt to create a new ad-hoc network.
1962          */
1963         os_memset(&iwr, 0, sizeof(iwr));
1964         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1965         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
1966                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]: %s",
1967                            strerror(errno));
1968                 iwr.u.mode = IW_MODE_INFRA;
1969         }
1970
1971         if (iwr.u.mode == IW_MODE_INFRA) {
1972                 /* Clear the BSSID selection */
1973                 if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0) {
1974                         wpa_printf(MSG_DEBUG, "WEXT: Failed to clear BSSID "
1975                                    "selection on disconnect");
1976                 }
1977
1978                 if (drv->cfg80211) {
1979                         /*
1980                          * cfg80211 supports SIOCSIWMLME commands, so there is
1981                          * no need for the random SSID hack, but clear the
1982                          * SSID.
1983                          */
1984                         if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
1985                                 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear "
1986                                            "SSID on disconnect");
1987                         }
1988                         return;
1989                 }
1990
1991                 /*
1992                  * Set a random SSID to make sure the driver will not be trying
1993                  * to associate with something even if it does not understand
1994                  * SIOCSIWMLME commands (or tries to associate automatically
1995                  * after deauth/disassoc).
1996                  */
1997                 for (i = 0; i < SSID_MAX_LEN; i++)
1998                         ssid[i] = rand() & 0xFF;
1999                 if (wpa_driver_wext_set_ssid(drv, ssid, SSID_MAX_LEN) < 0) {
2000                         wpa_printf(MSG_DEBUG, "WEXT: Failed to set bogus "
2001                                    "SSID to disconnect");
2002                 }
2003         }
2004 }
2005
2006
2007 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
2008                                           int reason_code)
2009 {
2010         struct wpa_driver_wext_data *drv = priv;
2011         int ret;
2012         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2013         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2014         wpa_driver_wext_disconnect(drv);
2015         return ret;
2016 }
2017
2018
2019 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
2020                                       size_t ie_len)
2021 {
2022         struct wpa_driver_wext_data *drv = priv;
2023         struct iwreq iwr;
2024         int ret = 0;
2025
2026         os_memset(&iwr, 0, sizeof(iwr));
2027         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2028         iwr.u.data.pointer = (caddr_t) ie;
2029         iwr.u.data.length = ie_len;
2030
2031         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2032                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWGENIE]: %s",
2033                            strerror(errno));
2034                 ret = -1;
2035         }
2036
2037         return ret;
2038 }
2039
2040
2041 int wpa_driver_wext_cipher2wext(int cipher)
2042 {
2043         switch (cipher) {
2044         case WPA_CIPHER_NONE:
2045                 return IW_AUTH_CIPHER_NONE;
2046         case WPA_CIPHER_WEP40:
2047                 return IW_AUTH_CIPHER_WEP40;
2048         case WPA_CIPHER_TKIP:
2049                 return IW_AUTH_CIPHER_TKIP;
2050         case WPA_CIPHER_CCMP:
2051                 return IW_AUTH_CIPHER_CCMP;
2052         case WPA_CIPHER_WEP104:
2053                 return IW_AUTH_CIPHER_WEP104;
2054         default:
2055                 return 0;
2056         }
2057 }
2058
2059
2060 int wpa_driver_wext_keymgmt2wext(int keymgmt)
2061 {
2062         switch (keymgmt) {
2063         case WPA_KEY_MGMT_IEEE8021X:
2064         case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
2065                 return IW_AUTH_KEY_MGMT_802_1X;
2066         case WPA_KEY_MGMT_PSK:
2067                 return IW_AUTH_KEY_MGMT_PSK;
2068         default:
2069                 return 0;
2070         }
2071 }
2072
2073
2074 static int
2075 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
2076                                   struct wpa_driver_associate_params *params)
2077 {
2078         struct iwreq iwr;
2079         int ret = 0;
2080
2081         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2082                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2083
2084         os_memset(&iwr, 0, sizeof(iwr));
2085         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2086         /* Just changing mode, not actual keys */
2087         iwr.u.encoding.flags = 0;
2088         iwr.u.encoding.pointer = (caddr_t) NULL;
2089         iwr.u.encoding.length = 0;
2090
2091         /*
2092          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2093          * different things. Here they are used to indicate Open System vs.
2094          * Shared Key authentication algorithm. However, some drivers may use
2095          * them to select between open/restricted WEP encrypted (open = allow
2096          * both unencrypted and encrypted frames; restricted = only allow
2097          * encrypted frames).
2098          */
2099
2100         if (!drv->use_crypt) {
2101                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2102         } else {
2103                 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2104                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2105                 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2106                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2107         }
2108
2109         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2110                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]: %s",
2111                            strerror(errno));
2112                 ret = -1;
2113         }
2114
2115         return ret;
2116 }
2117
2118
2119 int wpa_driver_wext_associate(void *priv,
2120                               struct wpa_driver_associate_params *params)
2121 {
2122         struct wpa_driver_wext_data *drv = priv;
2123         int ret = 0;
2124         int allow_unencrypted_eapol;
2125         int value;
2126
2127         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2128
2129         if (drv->cfg80211) {
2130                 /*
2131                  * Stop cfg80211 from trying to associate before we are done
2132                  * with all parameters.
2133                  */
2134                 if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
2135                         wpa_printf(MSG_DEBUG,
2136                                    "WEXT: Failed to clear SSID to stop pending cfg80211 association attempts (if any)");
2137                         /* continue anyway */
2138                 }
2139         }
2140
2141         if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
2142             < 0)
2143                 ret = -1;
2144         if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
2145                 ret = -1;
2146         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2147                 ret = -1;
2148
2149         /*
2150          * If the driver did not support SIOCSIWAUTH, fallback to
2151          * SIOCSIWENCODE here.
2152          */
2153         if (drv->auth_alg_fallback &&
2154             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2155                 ret = -1;
2156
2157         if (!params->bssid &&
2158             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2159                 ret = -1;
2160
2161         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2162          * from configuration, not from here, where only the selected suite is
2163          * available */
2164         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2165             < 0)
2166                 ret = -1;
2167         if (params->wpa_proto & WPA_PROTO_RSN)
2168                 value = IW_AUTH_WPA_VERSION_WPA2;
2169         else if (params->wpa_proto & WPA_PROTO_WPA)
2170                 value = IW_AUTH_WPA_VERSION_WPA;
2171         else
2172                 value = IW_AUTH_WPA_VERSION_DISABLED;
2173         if (wpa_driver_wext_set_auth_param(drv,
2174                                            IW_AUTH_WPA_VERSION, value) < 0)
2175                 ret = -1;
2176         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2177         if (wpa_driver_wext_set_auth_param(drv,
2178                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2179                 ret = -1;
2180         value = wpa_driver_wext_cipher2wext(params->group_suite);
2181         if (wpa_driver_wext_set_auth_param(drv,
2182                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2183                 ret = -1;
2184         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2185         if (wpa_driver_wext_set_auth_param(drv,
2186                                            IW_AUTH_KEY_MGMT, value) < 0)
2187                 ret = -1;
2188         value = params->key_mgmt_suite != WPA_KEY_MGMT_NONE ||
2189                 params->pairwise_suite != WPA_CIPHER_NONE ||
2190                 params->group_suite != WPA_CIPHER_NONE ||
2191                 (params->wpa_proto & (WPA_PROTO_RSN | WPA_PROTO_WPA));
2192         if (wpa_driver_wext_set_auth_param(drv,
2193                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2194                 ret = -1;
2195
2196         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2197          * not using WPA. IEEE 802.1X specifies that these frames are not
2198          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2199         if (params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X ||
2200             params->key_mgmt_suite == WPA_KEY_MGMT_PSK)
2201                 allow_unencrypted_eapol = 0;
2202         else
2203                 allow_unencrypted_eapol = 1;
2204
2205         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2206                 ret = -1;
2207         if (wpa_driver_wext_set_auth_param(drv,
2208                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2209                                            allow_unencrypted_eapol) < 0)
2210                 ret = -1;
2211 #ifdef CONFIG_IEEE80211W
2212         switch (params->mgmt_frame_protection) {
2213         case NO_MGMT_FRAME_PROTECTION:
2214                 value = IW_AUTH_MFP_DISABLED;
2215                 break;
2216         case MGMT_FRAME_PROTECTION_OPTIONAL:
2217                 value = IW_AUTH_MFP_OPTIONAL;
2218                 break;
2219         case MGMT_FRAME_PROTECTION_REQUIRED:
2220                 value = IW_AUTH_MFP_REQUIRED;
2221                 break;
2222         };
2223         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2224                 ret = -1;
2225 #endif /* CONFIG_IEEE80211W */
2226         if (params->freq.freq &&
2227             wpa_driver_wext_set_freq(drv, params->freq.freq) < 0)
2228                 ret = -1;
2229         if (!drv->cfg80211 &&
2230             wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2231                 ret = -1;
2232         if (params->bssid &&
2233             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2234                 ret = -1;
2235         if (drv->cfg80211 &&
2236             wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2237                 ret = -1;
2238
2239         return ret;
2240 }
2241
2242
2243 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2244 {
2245         struct wpa_driver_wext_data *drv = priv;
2246         int algs = 0, res;
2247
2248         if (auth_alg & WPA_AUTH_ALG_OPEN)
2249                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2250         if (auth_alg & WPA_AUTH_ALG_SHARED)
2251                 algs |= IW_AUTH_ALG_SHARED_KEY;
2252         if (auth_alg & WPA_AUTH_ALG_LEAP)
2253                 algs |= IW_AUTH_ALG_LEAP;
2254         if (algs == 0) {
2255                 /* at least one algorithm should be set */
2256                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2257         }
2258
2259         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2260                                              algs);
2261         drv->auth_alg_fallback = res == -2;
2262         return res;
2263 }
2264
2265
2266 /**
2267  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2268  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2269  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2270  * Returns: 0 on success, -1 on failure
2271  */
2272 int wpa_driver_wext_set_mode(void *priv, int mode)
2273 {
2274         struct wpa_driver_wext_data *drv = priv;
2275         struct iwreq iwr;
2276         int ret = -1;
2277         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2278
2279         os_memset(&iwr, 0, sizeof(iwr));
2280         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2281         iwr.u.mode = new_mode;
2282         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2283                 ret = 0;
2284                 goto done;
2285         }
2286
2287         if (errno != EBUSY) {
2288                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]: %s",
2289                            strerror(errno));
2290                 goto done;
2291         }
2292
2293         /* mac80211 doesn't allow mode changes while the device is up, so if
2294          * the device isn't in the mode we're about to change to, take device
2295          * down, try to set the mode again, and bring it back up.
2296          */
2297         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2298                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]: %s",
2299                            strerror(errno));
2300                 goto done;
2301         }
2302
2303         if (iwr.u.mode == new_mode) {
2304                 ret = 0;
2305                 goto done;
2306         }
2307
2308         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
2309                 /* Try to set the mode again while the interface is down */
2310                 iwr.u.mode = new_mode;
2311                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2312                         wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]: %s",
2313                                    strerror(errno));
2314                 else
2315                         ret = 0;
2316
2317                 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1);
2318         }
2319
2320 done:
2321         return ret;
2322 }
2323
2324
2325 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2326                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2327 {
2328         struct iwreq iwr;
2329         struct iw_pmksa pmksa;
2330         int ret = 0;
2331
2332         os_memset(&iwr, 0, sizeof(iwr));
2333         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2334         os_memset(&pmksa, 0, sizeof(pmksa));
2335         pmksa.cmd = cmd;
2336         pmksa.bssid.sa_family = ARPHRD_ETHER;
2337         if (bssid)
2338                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2339         if (pmkid)
2340                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2341         iwr.u.data.pointer = (caddr_t) &pmksa;
2342         iwr.u.data.length = sizeof(pmksa);
2343
2344         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2345                 if (errno != EOPNOTSUPP)
2346                         wpa_printf(MSG_ERROR, "ioctl[SIOCSIWPMKSA]: %s",
2347                                    strerror(errno));
2348                 ret = -1;
2349         }
2350
2351         return ret;
2352 }
2353
2354
2355 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2356                                      const u8 *pmkid)
2357 {
2358         struct wpa_driver_wext_data *drv = priv;
2359         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2360 }
2361
2362
2363 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2364                                         const u8 *pmkid)
2365 {
2366         struct wpa_driver_wext_data *drv = priv;
2367         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2368 }
2369
2370
2371 static int wpa_driver_wext_flush_pmkid(void *priv)
2372 {
2373         struct wpa_driver_wext_data *drv = priv;
2374         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2375 }
2376
2377
2378 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2379 {
2380         struct wpa_driver_wext_data *drv = priv;
2381         if (!drv->has_capability)
2382                 return -1;
2383         os_memcpy(capa, &drv->capa, sizeof(*capa));
2384         return 0;
2385 }
2386
2387
2388 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2389                                         const char *ifname)
2390 {
2391         if (ifname == NULL) {
2392                 drv->ifindex2 = -1;
2393                 return 0;
2394         }
2395
2396         drv->ifindex2 = if_nametoindex(ifname);
2397         if (drv->ifindex2 <= 0)
2398                 return -1;
2399
2400         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2401                    "wireless events", drv->ifindex2, ifname);
2402
2403         return 0;
2404 }
2405
2406
2407 int wpa_driver_wext_set_operstate(void *priv, int state)
2408 {
2409         struct wpa_driver_wext_data *drv = priv;
2410
2411         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2412                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2413         drv->operstate = state;
2414         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
2415                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
2416 }
2417
2418
2419 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2420 {
2421         return drv->we_version_compiled;
2422 }
2423
2424
2425 static const char * wext_get_radio_name(void *priv)
2426 {
2427         struct wpa_driver_wext_data *drv = priv;
2428         return drv->phyname;
2429 }
2430
2431
2432 static int wpa_driver_wext_signal_poll(void *priv, struct wpa_signal_info *si)
2433 {
2434         struct wpa_driver_wext_data *drv = priv;
2435         struct iw_statistics stats;
2436         struct iwreq iwr;
2437
2438         os_memset(si, 0, sizeof(*si));
2439         si->current_signal = -9999;
2440         si->current_noise = 9999;
2441         si->chanwidth = CHAN_WIDTH_UNKNOWN;
2442
2443         os_memset(&iwr, 0, sizeof(iwr));
2444         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2445         iwr.u.data.pointer = (caddr_t) &stats;
2446         iwr.u.data.length = sizeof(stats);
2447         iwr.u.data.flags = 1;
2448
2449         if (ioctl(drv->ioctl_sock, SIOCGIWSTATS, &iwr) < 0) {
2450                 wpa_printf(MSG_ERROR, "WEXT: SIOCGIWSTATS: %s",
2451                            strerror(errno));
2452                 return -1;
2453         }
2454
2455         si->current_signal = stats.qual.level -
2456                 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2457         si->current_noise = stats.qual.noise -
2458                 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2459         return 0;
2460 }
2461
2462
2463 static int wpa_driver_wext_status(void *priv, char *buf, size_t buflen)
2464 {
2465         struct wpa_driver_wext_data *drv = priv;
2466         int res;
2467         char *pos, *end;
2468         unsigned char addr[ETH_ALEN];
2469
2470         pos = buf;
2471         end = buf + buflen;
2472
2473         if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, addr))
2474                 return -1;
2475
2476         res = os_snprintf(pos, end - pos,
2477                           "ifindex=%d\n"
2478                           "ifname=%s\n"
2479                           "addr=" MACSTR "\n",
2480                           drv->ifindex,
2481                           drv->ifname,
2482                           MAC2STR(addr));
2483         if (os_snprintf_error(end - pos, res))
2484                 return pos - buf;
2485         pos += res;
2486
2487         return pos - buf;
2488 }
2489
2490 const struct wpa_driver_ops wpa_driver_wext_ops = {
2491         .name = "wext",
2492         .desc = "Linux wireless extensions (generic)",
2493         .get_bssid = wpa_driver_wext_get_bssid,
2494         .get_ssid = wpa_driver_wext_get_ssid,
2495         .set_key = wpa_driver_wext_set_key,
2496         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2497         .scan2 = wpa_driver_wext_scan,
2498         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2499         .deauthenticate = wpa_driver_wext_deauthenticate,
2500         .associate = wpa_driver_wext_associate,
2501         .init = wpa_driver_wext_init,
2502         .deinit = wpa_driver_wext_deinit,
2503         .add_pmkid = wpa_driver_wext_add_pmkid,
2504         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2505         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2506         .get_capa = wpa_driver_wext_get_capa,
2507         .set_operstate = wpa_driver_wext_set_operstate,
2508         .get_radio_name = wext_get_radio_name,
2509         .signal_poll = wpa_driver_wext_signal_poll,
2510         .status = wpa_driver_wext_status,
2511 };