src/drivers/driver_wext.c

   1 /*
   2  * WPA Supplicant - driver interaction with generic Linux Wireless Extensions
   3  * Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements a driver interface for the Linux Wireless Extensions.
  15  * When used with WE-18 or newer, this interface can be used as-is with number
  16  * of drivers. In addition to this, some of the common functions in this file
  17  * can be used by other driver interface implementations that use generic WE
  18  * ioctls, but require private ioctls for some of the functionality.
  19  */
  20
  21 #include "includes.h"
  22 #include <sys/ioctl.h>
  23 #include <net/if_arp.h>
  24
  25 #include "wireless_copy.h"
  26 #include "common.h"
  27 #include "eloop.h"
  28 #include "common/ieee802_11_defs.h"
  29 #include "common/wpa_common.h"
  30 #include "priv_netlink.h"
  31 #include "netlink.h"
  32 #include "driver.h"
  33 #include "driver_wext.h"
  34
  35
  36 static int wpa_driver_wext_flush_pmkid(void *priv);
  37 static int wpa_driver_wext_get_range(void *priv);
  38 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
  39 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv);
  40 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg);
  41
  42
  43 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
  44                                    int idx, u32 value)
  45 {
  46         struct iwreq iwr;
  47         int ret = 0;
  48
  49         os_memset(&iwr, 0, sizeof(iwr));
  50         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
  51         iwr.u.param.flags = idx & IW_AUTH_INDEX;
  52         iwr.u.param.value = value;
  53
  54         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
  55                 if (errno != EOPNOTSUPP) {
  56                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
  57                                    "value 0x%x) failed: %s)",
  58                                    idx, value, strerror(errno));
  59                 }
  60                 ret = errno == EOPNOTSUPP ? -2 : -1;
  61         }
  62
  63         return ret;
  64 }
  65
  66
  67 /**
  68  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
  69  * @priv: Pointer to private wext data from wpa_driver_wext_init()
  70  * @bssid: Buffer for BSSID
  71  * Returns: 0 on success, -1 on failure
  72  */
  73 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
  74 {
  75         struct wpa_driver_wext_data *drv = priv;
  76         struct iwreq iwr;
  77         int ret = 0;
  78
  79         os_memset(&iwr, 0, sizeof(iwr));
  80         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
  81
  82         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
  83                 perror("ioctl[SIOCGIWAP]");
  84                 ret = -1;
  85         }
  86         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
  87
  88         return ret;
  89 }
  90
  91
  92 /**
  93  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
  94  * @priv: Pointer to private wext data from wpa_driver_wext_init()
  95  * @bssid: BSSID
  96  * Returns: 0 on success, -1 on failure
  97  */
  98 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
  99 {
 100         struct wpa_driver_wext_data *drv = priv;
 101         struct iwreq iwr;
 102         int ret = 0;
 103
 104         os_memset(&iwr, 0, sizeof(iwr));
 105         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 106         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 107         if (bssid)
 108                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 109         else
 110                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 111
 112         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 113                 perror("ioctl[SIOCSIWAP]");
 114                 ret = -1;
 115         }
 116
 117         return ret;
 118 }
 119
 120
 121 /**
 122  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 123  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 124  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 125  * Returns: SSID length on success, -1 on failure
 126  */
 127 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 128 {
 129         struct wpa_driver_wext_data *drv = priv;
 130         struct iwreq iwr;
 131         int ret = 0;
 132
 133         os_memset(&iwr, 0, sizeof(iwr));
 134         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 135         iwr.u.essid.pointer = (caddr_t) ssid;
 136         iwr.u.essid.length = 32;
 137
 138         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 139                 perror("ioctl[SIOCGIWESSID]");
 140                 ret = -1;
 141         } else {
 142                 ret = iwr.u.essid.length;
 143                 if (ret > 32)
 144                         ret = 32;
 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 > 32)
 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                 perror("ioctl[SIOCSIWESSID]");
 198                 ret = -1;
 199         }
 200
 201         return ret;
 202 }
 203
 204
 205 /**
 206  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 207  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 208  * @freq: Frequency in MHz
 209  * Returns: 0 on success, -1 on failure
 210  */
 211 int wpa_driver_wext_set_freq(void *priv, int freq)
 212 {
 213         struct wpa_driver_wext_data *drv = priv;
 214         struct iwreq iwr;
 215         int ret = 0;
 216
 217         os_memset(&iwr, 0, sizeof(iwr));
 218         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 219         iwr.u.freq.m = freq * 100000;
 220         iwr.u.freq.e = 1;
 221
 222         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 223                 perror("ioctl[SIOCSIWFREQ]");
 224                 ret = -1;
 225         }
 226
 227         return ret;
 228 }
 229
 230
 231 static void
 232 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 233 {
 234         union wpa_event_data data;
 235
 236         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 237                    custom);
 238
 239         os_memset(&data, 0, sizeof(data));
 240         /* Host AP driver */
 241         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 242                 data.michael_mic_failure.unicast =
 243                         os_strstr(custom, " unicast ") != NULL;
 244                 /* TODO: parse parameters(?) */
 245                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 246         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 247                 char *spos;
 248                 int bytes;
 249                 u8 *req_ies = NULL, *resp_ies = NULL;
 250
 251                 spos = custom + 17;
 252
 253                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 254                 if (!bytes || (bytes & 1))
 255                         return;
 256                 bytes /= 2;
 257
 258                 req_ies = os_malloc(bytes);
 259                 if (req_ies == NULL)
 260                         return;
 261                 hexstr2bin(spos, req_ies, bytes);
 262                 data.assoc_info.req_ies = req_ies;
 263                 data.assoc_info.req_ies_len = bytes;
 264
 265                 spos += bytes * 2;
 266
 267                 data.assoc_info.resp_ies = NULL;
 268                 data.assoc_info.resp_ies_len = 0;
 269
 270                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 271                         spos += 9;
 272
 273                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 274                         if (!bytes || (bytes & 1))
 275                                 goto done;
 276                         bytes /= 2;
 277
 278                         resp_ies = os_malloc(bytes);
 279                         if (resp_ies == NULL)
 280                                 goto done;
 281                         hexstr2bin(spos, resp_ies, bytes);
 282                         data.assoc_info.resp_ies = resp_ies;
 283                         data.assoc_info.resp_ies_len = bytes;
 284                 }
 285
 286                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 287
 288         done:
 289                 os_free(resp_ies);
 290                 os_free(req_ies);
 291 #ifdef CONFIG_PEERKEY
 292         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 293                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 294                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 295                                    "STKSTART.request '%s'", custom + 17);
 296                         return;
 297                 }
 298                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 299 #endif /* CONFIG_PEERKEY */
 300         }
 301 }
 302
 303
 304 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 305         void *ctx, const char *ev, size_t len)
 306 {
 307         const struct iw_michaelmicfailure *mic;
 308         union wpa_event_data data;
 309
 310         if (len < sizeof(*mic))
 311                 return -1;
 312
 313         mic = (const struct iw_michaelmicfailure *) ev;
 314
 315         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 316                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 317                    MAC2STR(mic->src_addr.sa_data));
 318
 319         os_memset(&data, 0, sizeof(data));
 320         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 321         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 322
 323         return 0;
 324 }
 325
 326
 327 static int wpa_driver_wext_event_wireless_pmkidcand(
 328         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 329 {
 330         const struct iw_pmkid_cand *cand;
 331         union wpa_event_data data;
 332         const u8 *addr;
 333
 334         if (len < sizeof(*cand))
 335                 return -1;
 336
 337         cand = (const struct iw_pmkid_cand *) ev;
 338         addr = (const u8 *) cand->bssid.sa_data;
 339
 340         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 341                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 342                    cand->index, MAC2STR(addr));
 343
 344         os_memset(&data, 0, sizeof(data));
 345         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 346         data.pmkid_candidate.index = cand->index;
 347         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 348         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 349
 350         return 0;
 351 }
 352
 353
 354 static int wpa_driver_wext_event_wireless_assocreqie(
 355         struct wpa_driver_wext_data *drv, const char *ev, int len)
 356 {
 357         if (len < 0)
 358                 return -1;
 359
 360         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 361                     len);
 362         os_free(drv->assoc_req_ies);
 363         drv->assoc_req_ies = os_malloc(len);
 364         if (drv->assoc_req_ies == NULL) {
 365                 drv->assoc_req_ies_len = 0;
 366                 return -1;
 367         }
 368         os_memcpy(drv->assoc_req_ies, ev, len);
 369         drv->assoc_req_ies_len = len;
 370
 371         return 0;
 372 }
 373
 374
 375 static int wpa_driver_wext_event_wireless_assocrespie(
 376         struct wpa_driver_wext_data *drv, const char *ev, int len)
 377 {
 378         if (len < 0)
 379                 return -1;
 380
 381         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 382                     len);
 383         os_free(drv->assoc_resp_ies);
 384         drv->assoc_resp_ies = os_malloc(len);
 385         if (drv->assoc_resp_ies == NULL) {
 386                 drv->assoc_resp_ies_len = 0;
 387                 return -1;
 388         }
 389         os_memcpy(drv->assoc_resp_ies, ev, len);
 390         drv->assoc_resp_ies_len = len;
 391
 392         return 0;
 393 }
 394
 395
 396 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 397 {
 398         union wpa_event_data data;
 399
 400         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 401                 return;
 402
 403         os_memset(&data, 0, sizeof(data));
 404         if (drv->assoc_req_ies) {
 405                 data.assoc_info.req_ies = drv->assoc_req_ies;
 406                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 407         }
 408         if (drv->assoc_resp_ies) {
 409                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 410                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 411         }
 412
 413         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 414
 415         os_free(drv->assoc_req_ies);
 416         drv->assoc_req_ies = NULL;
 417         os_free(drv->assoc_resp_ies);
 418         drv->assoc_resp_ies = NULL;
 419 }
 420
 421
 422 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 423                                            char *data, int len)
 424 {
 425         struct iw_event iwe_buf, *iwe = &iwe_buf;
 426         char *pos, *end, *custom, *buf;
 427
 428         pos = data;
 429         end = data + len;
 430
 431         while (pos + IW_EV_LCP_LEN <= end) {
 432                 /* Event data may be unaligned, so make a local, aligned copy
 433                  * before processing. */
 434                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 435                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 436                            iwe->cmd, iwe->len);
 437                 if (iwe->len <= IW_EV_LCP_LEN)
 438                         return;
 439
 440                 custom = pos + IW_EV_POINT_LEN;
 441                 if (drv->we_version_compiled > 18 &&
 442                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 443                      iwe->cmd == IWEVCUSTOM ||
 444                      iwe->cmd == IWEVASSOCREQIE ||
 445                      iwe->cmd == IWEVASSOCRESPIE ||
 446                      iwe->cmd == IWEVPMKIDCAND)) {
 447                         /* WE-19 removed the pointer from struct iw_point */
 448                         char *dpos = (char *) &iwe_buf.u.data.length;
 449                         int dlen = dpos - (char *) &iwe_buf;
 450                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 451                                   sizeof(struct iw_event) - dlen);
 452                 } else {
 453                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 454                         custom += IW_EV_POINT_OFF;
 455                 }
 456
 457                 switch (iwe->cmd) {
 458                 case SIOCGIWAP:
 459                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 460                                    MACSTR,
 461                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 462                         if (is_zero_ether_addr(
 463                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 464                             os_memcmp(iwe->u.ap_addr.sa_data,
 465                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 466                             0) {
 467                                 os_free(drv->assoc_req_ies);
 468                                 drv->assoc_req_ies = NULL;
 469                                 os_free(drv->assoc_resp_ies);
 470                                 drv->assoc_resp_ies = NULL;
 471                                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC,
 472                                                      NULL);
 473
 474                         } else {
 475                                 wpa_driver_wext_event_assoc_ies(drv);
 476                                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC,
 477                                                      NULL);
 478                         }
 479                         break;
 480                 case IWEVMICHAELMICFAILURE:
 481                         if (custom + iwe->u.data.length > end) {
 482                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 483                                            "IWEVMICHAELMICFAILURE length");
 484                                 return;
 485                         }
 486                         wpa_driver_wext_event_wireless_michaelmicfailure(
 487                                 drv->ctx, custom, iwe->u.data.length);
 488                         break;
 489                 case IWEVCUSTOM:
 490                         if (custom + iwe->u.data.length > end) {
 491                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 492                                            "IWEVCUSTOM length");
 493                                 return;
 494                         }
 495                         buf = os_malloc(iwe->u.data.length + 1);
 496                         if (buf == NULL)
 497                                 return;
 498                         os_memcpy(buf, custom, iwe->u.data.length);
 499                         buf[iwe->u.data.length] = '\0';
 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 (custom + iwe->u.data.length > end) {
 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 (custom + iwe->u.data.length > end) {
 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 (custom + iwe->u.data.length > end) {
 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                         drv->if_removed = 1;
 564                 else
 565                         drv->if_removed = 0;
 566         }
 567
 568         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 569 }
 570
 571
 572 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 573                                       u8 *buf, size_t len)
 574 {
 575         int attrlen, rta_len;
 576         struct rtattr *attr;
 577
 578         attrlen = len;
 579         attr = (struct rtattr *) buf;
 580
 581         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 582         while (RTA_OK(attr, attrlen)) {
 583                 if (attr->rta_type == IFLA_IFNAME) {
 584                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 585                             == 0)
 586                                 return 1;
 587                         else
 588                                 break;
 589                 }
 590                 attr = RTA_NEXT(attr, attrlen);
 591         }
 592
 593         return 0;
 594 }
 595
 596
 597 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 598                                        int ifindex, u8 *buf, size_t len)
 599 {
 600         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 601                 return 1;
 602
 603         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, buf, len)) {
 604                 drv->ifindex = if_nametoindex(drv->ifname);
 605                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 606                            "interface");
 607                 wpa_driver_wext_finish_drv_init(drv);
 608                 return 1;
 609         }
 610
 611         return 0;
 612 }
 613
 614
 615 static void wpa_driver_wext_event_rtm_newlink(void *ctx, struct ifinfomsg *ifi,
 616                                               u8 *buf, size_t len)
 617 {
 618         struct wpa_driver_wext_data *drv = ctx;
 619         int attrlen, rta_len;
 620         struct rtattr *attr;
 621
 622         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 623                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 624                            ifi->ifi_index);
 625                 return;
 626         }
 627
 628         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 629                    "(%s%s%s%s)",
 630                    drv->operstate, ifi->ifi_flags,
 631                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 632                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 633                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 634                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 635         /*
 636          * Some drivers send the association event before the operup event--in
 637          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 638          * fails. This will hit us when wpa_supplicant does not need to do
 639          * IEEE 802.1X authentication
 640          */
 641         if (drv->operstate == 1 &&
 642             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 643             !(ifi->ifi_flags & IFF_RUNNING))
 644                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 645                                        -1, IF_OPER_UP);
 646
 647         attrlen = len;
 648         attr = (struct rtattr *) buf;
 649
 650         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 651         while (RTA_OK(attr, attrlen)) {
 652                 if (attr->rta_type == IFLA_WIRELESS) {
 653                         wpa_driver_wext_event_wireless(
 654                                 drv, ((char *) attr) + rta_len,
 655                                 attr->rta_len - rta_len);
 656                 } else if (attr->rta_type == IFLA_IFNAME) {
 657                         wpa_driver_wext_event_link(drv,
 658                                                    ((char *) attr) + rta_len,
 659                                                    attr->rta_len - rta_len, 0);
 660                 }
 661                 attr = RTA_NEXT(attr, attrlen);
 662         }
 663 }
 664
 665
 666 static void wpa_driver_wext_event_rtm_dellink(void *ctx, struct ifinfomsg *ifi,
 667                                               u8 *buf, size_t len)
 668 {
 669         struct wpa_driver_wext_data *drv = ctx;
 670         int attrlen, rta_len;
 671         struct rtattr *attr;
 672
 673         attrlen = len;
 674         attr = (struct rtattr *) buf;
 675
 676         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 677         while (RTA_OK(attr, attrlen)) {
 678                 if (attr->rta_type == IFLA_IFNAME) {
 679                         wpa_driver_wext_event_link(drv,
 680                                                    ((char *) attr) + rta_len,
 681                                                    attr->rta_len - rta_len, 1);
 682                 }
 683                 attr = RTA_NEXT(attr, attrlen);
 684         }
 685 }
 686
 687
 688 static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
 689                                               const char *ifname, int *flags)
 690 {
 691         struct ifreq ifr;
 692
 693         os_memset(&ifr, 0, sizeof(ifr));
 694         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 695         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 696                 perror("ioctl[SIOCGIFFLAGS]");
 697                 return -1;
 698         }
 699         *flags = ifr.ifr_flags & 0xffff;
 700         return 0;
 701 }
 702
 703
 704 /**
 705  * wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 706  * @drv: driver_wext private data
 707  * @flags: Pointer to returned flags value
 708  * Returns: 0 on success, -1 on failure
 709  */
 710 int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
 711 {
 712         return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
 713 }
 714
 715
 716 static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
 717                                               const char *ifname, int flags)
 718 {
 719         struct ifreq ifr;
 720
 721         os_memset(&ifr, 0, sizeof(ifr));
 722         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 723         ifr.ifr_flags = flags & 0xffff;
 724         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 725                 perror("SIOCSIFFLAGS");
 726                 return -1;
 727         }
 728         return 0;
 729 }
 730
 731
 732 /**
 733  * wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 734  * @drv: driver_wext private data
 735  * @flags: New value for flags
 736  * Returns: 0 on success, -1 on failure
 737  */
 738 int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
 739 {
 740         return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
 741 }
 742
 743
 744 /**
 745  * wpa_driver_wext_init - Initialize WE driver interface
 746  * @ctx: context to be used when calling wpa_supplicant functions,
 747  * e.g., wpa_supplicant_event()
 748  * @ifname: interface name, e.g., wlan0
 749  * Returns: Pointer to private data, %NULL on failure
 750  */
 751 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 752 {
 753         struct wpa_driver_wext_data *drv;
 754         struct netlink_config *cfg;
 755
 756         drv = os_zalloc(sizeof(*drv));
 757         if (drv == NULL)
 758                 return NULL;
 759         drv->ctx = ctx;
 760         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 761
 762         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 763         if (drv->ioctl_sock < 0) {
 764                 perror("socket(PF_INET,SOCK_DGRAM)");
 765                 goto err1;
 766         }
 767
 768         cfg = os_zalloc(sizeof(*cfg));
 769         if (cfg == NULL)
 770                 goto err1;
 771         cfg->ctx = drv;
 772         cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink;
 773         cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink;
 774         drv->netlink = netlink_init(cfg);
 775         if (drv->netlink == NULL) {
 776                 os_free(cfg);
 777                 goto err2;
 778         }
 779
 780         drv->mlme_sock = -1;
 781
 782         if (wpa_driver_wext_finish_drv_init(drv) < 0)
 783                 goto err3;
 784
 785         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1);
 786
 787         return drv;
 788
 789 err3:
 790         netlink_deinit(drv->netlink);
 791 err2:
 792         close(drv->ioctl_sock);
 793 err1:
 794         os_free(drv);
 795         return NULL;
 796 }
 797
 798
 799 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
 800 {
 801         int flags;
 802
 803         if (wpa_driver_wext_get_ifflags(drv, &flags) != 0) {
 804                 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
 805                            drv->ifname);
 806                 return -1;
 807         }
 808
 809         if (!(flags & IFF_UP)) {
 810                 if (wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
 811                         wpa_printf(MSG_ERROR, "Could not set interface '%s' "
 812                                    "UP", drv->ifname);
 813                         return -1;
 814                 } else {
 815                         /*
 816                          * Wait some time to allow driver to initialize before
 817                          * starting configuring the driver. This seems to be
 818                          * needed at least some drivers that load firmware etc.
 819                          * when the interface is set up.
 820                          */
 821                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
 822                                    "a second for the driver to complete "
 823                                    "initialization", drv->ifname);
 824                         sleep(1);
 825                 }
 826         }
 827
 828         /*
 829          * Make sure that the driver does not have any obsolete PMKID entries.
 830          */
 831         wpa_driver_wext_flush_pmkid(drv);
 832
 833         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
 834                 wpa_printf(MSG_DEBUG, "Could not configure driver to use "
 835                            "managed mode");
 836                 /* Try to use it anyway */
 837         }
 838
 839         wpa_driver_wext_get_range(drv);
 840
 841         /*
 842          * Unlock the driver's BSSID and force to a random SSID to clear any
 843          * previous association the driver might have when the supplicant
 844          * starts up.
 845          */
 846         wpa_driver_wext_disconnect(drv);
 847
 848         drv->ifindex = if_nametoindex(drv->ifname);
 849
 850         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
 851                 /*
 852                  * Host AP driver may use both wlan# and wifi# interface in
 853                  * wireless events. Since some of the versions included WE-18
 854                  * support, let's add the alternative ifindex also from
 855                  * driver_wext.c for the time being. This may be removed at
 856                  * some point once it is believed that old versions of the
 857                  * driver are not in use anymore.
 858                  */
 859                 char ifname2[IFNAMSIZ + 1];
 860                 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
 861                 os_memcpy(ifname2, "wifi", 4);
 862                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
 863         }
 864
 865         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 866                                1, IF_OPER_DORMANT);
 867
 868         return 0;
 869 }
 870
 871
 872 /**
 873  * wpa_driver_wext_deinit - Deinitialize WE driver interface
 874  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 875  *
 876  * Shut down driver interface and processing of driver events. Free
 877  * private data buffer if one was allocated in wpa_driver_wext_init().
 878  */
 879 void wpa_driver_wext_deinit(void *priv)
 880 {
 881         struct wpa_driver_wext_data *drv = priv;
 882         int flags;
 883
 884         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
 885
 886         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
 887
 888         /*
 889          * Clear possibly configured driver parameters in order to make it
 890          * easier to use the driver after wpa_supplicant has been terminated.
 891          */
 892         wpa_driver_wext_disconnect(drv);
 893
 894         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
 895         netlink_deinit(drv->netlink);
 896
 897         if (drv->mlme_sock >= 0)
 898                 eloop_unregister_read_sock(drv->mlme_sock);
 899
 900         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
 901                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
 902
 903         close(drv->ioctl_sock);
 904         if (drv->mlme_sock >= 0)
 905                 close(drv->mlme_sock);
 906         os_free(drv->assoc_req_ies);
 907         os_free(drv->assoc_resp_ies);
 908         os_free(drv);
 909 }
 910
 911
 912 /**
 913  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
 914  * @eloop_ctx: Unused
 915  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
 916  *
 917  * This function can be used as registered timeout when starting a scan to
 918  * generate a scan completed event if the driver does not report this.
 919  */
 920 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 921 {
 922         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
 923         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
 924 }
 925
 926
 927 /**
 928  * wpa_driver_wext_scan - Request the driver to initiate scan
 929  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 930  * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
 931  * Returns: 0 on success, -1 on failure
 932  */
 933 int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
 934 {
 935         struct wpa_driver_wext_data *drv = priv;
 936         struct iwreq iwr;
 937         int ret = 0, timeout;
 938         struct iw_scan_req req;
 939         const u8 *ssid = params->ssids[0].ssid;
 940         size_t ssid_len = params->ssids[0].ssid_len;
 941
 942         if (ssid_len > IW_ESSID_MAX_SIZE) {
 943                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
 944                            __FUNCTION__, (unsigned long) ssid_len);
 945                 return -1;
 946         }
 947
 948         os_memset(&iwr, 0, sizeof(iwr));
 949         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 950
 951         if (ssid && ssid_len) {
 952                 os_memset(&req, 0, sizeof(req));
 953                 req.essid_len = ssid_len;
 954                 req.bssid.sa_family = ARPHRD_ETHER;
 955                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
 956                 os_memcpy(req.essid, ssid, ssid_len);
 957                 iwr.u.data.pointer = (caddr_t) &req;
 958                 iwr.u.data.length = sizeof(req);
 959                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
 960         }
 961
 962         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
 963                 perror("ioctl[SIOCSIWSCAN]");
 964                 ret = -1;
 965         }
 966
 967         /* Not all drivers generate "scan completed" wireless event, so try to
 968          * read results after a timeout. */
 969         timeout = 5;
 970         if (drv->scan_complete_events) {
 971                 /*
 972                  * The driver seems to deliver SIOCGIWSCAN events to notify
 973                  * when scan is complete, so use longer timeout to avoid race
 974                  * conditions with scanning and following association request.
 975                  */
 976                 timeout = 30;
 977         }
 978         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
 979                    "seconds", ret, timeout);
 980         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
 981         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
 982                                drv->ctx);
 983
 984         return ret;
 985 }
 986
 987
 988 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
 989                                     size_t *len)
 990 {
 991         struct iwreq iwr;
 992         u8 *res_buf;
 993         size_t res_buf_len;
 994
 995         res_buf_len = IW_SCAN_MAX_DATA;
 996         for (;;) {
 997                 res_buf = os_malloc(res_buf_len);
 998                 if (res_buf == NULL)
 999                         return NULL;
1000                 os_memset(&iwr, 0, sizeof(iwr));
1001                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1002                 iwr.u.data.pointer = res_buf;
1003                 iwr.u.data.length = res_buf_len;
1004
1005                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1006                         break;
1007
1008                 if (errno == E2BIG && res_buf_len < 65535) {
1009                         os_free(res_buf);
1010                         res_buf = NULL;
1011                         res_buf_len *= 2;
1012                         if (res_buf_len > 65535)
1013                                 res_buf_len = 65535; /* 16-bit length field */
1014                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1015                                    "trying larger buffer (%lu bytes)",
1016                                    (unsigned long) res_buf_len);
1017                 } else {
1018                         perror("ioctl[SIOCGIWSCAN]");
1019                         os_free(res_buf);
1020                         return NULL;
1021                 }
1022         }
1023
1024         if (iwr.u.data.length > res_buf_len) {
1025                 os_free(res_buf);
1026                 return NULL;
1027         }
1028         *len = iwr.u.data.length;
1029
1030         return res_buf;
1031 }
1032
1033
1034 /*
1035  * Data structure for collecting WEXT scan results. This is needed to allow
1036  * the various methods of reporting IEs to be combined into a single IE buffer.
1037  */
1038 struct wext_scan_data {
1039         struct wpa_scan_res res;
1040         u8 *ie;
1041         size_t ie_len;
1042         u8 ssid[32];
1043         size_t ssid_len;
1044         int maxrate;
1045 };
1046
1047
1048 static void wext_get_scan_mode(struct iw_event *iwe,
1049                                struct wext_scan_data *res)
1050 {
1051         if (iwe->u.mode == IW_MODE_ADHOC)
1052                 res->res.caps |= IEEE80211_CAP_IBSS;
1053         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1054                 res->res.caps |= IEEE80211_CAP_ESS;
1055 }
1056
1057
1058 static void wext_get_scan_ssid(struct iw_event *iwe,
1059                                struct wext_scan_data *res, char *custom,
1060                                char *end)
1061 {
1062         int ssid_len = iwe->u.essid.length;
1063         if (custom + ssid_len > end)
1064                 return;
1065         if (iwe->u.essid.flags &&
1066             ssid_len > 0 &&
1067             ssid_len <= IW_ESSID_MAX_SIZE) {
1068                 os_memcpy(res->ssid, custom, ssid_len);
1069                 res->ssid_len = ssid_len;
1070         }
1071 }
1072
1073
1074 static void wext_get_scan_freq(struct iw_event *iwe,
1075                                struct wext_scan_data *res)
1076 {
1077         int divi = 1000000, i;
1078
1079         if (iwe->u.freq.e == 0) {
1080                 /*
1081                  * Some drivers do not report frequency, but a channel.
1082                  * Try to map this to frequency by assuming they are using
1083                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1084                  * frequency if the driver sends both frequency and channel,
1085                  * since the driver may be sending an A-band channel that we
1086                  * don't handle here.
1087                  */
1088
1089                 if (res->res.freq)
1090                         return;
1091
1092                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1093                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1094                         return;
1095                 } else if (iwe->u.freq.m == 14) {
1096                         res->res.freq = 2484;
1097                         return;
1098                 }
1099         }
1100
1101         if (iwe->u.freq.e > 6) {
1102                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1103                            MACSTR " m=%d e=%d)",
1104                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1105                            iwe->u.freq.e);
1106                 return;
1107         }
1108
1109         for (i = 0; i < iwe->u.freq.e; i++)
1110                 divi /= 10;
1111         res->res.freq = iwe->u.freq.m / divi;
1112 }
1113
1114
1115 static void wext_get_scan_qual(struct iw_event *iwe,
1116                                struct wext_scan_data *res)
1117 {
1118         res->res.qual = iwe->u.qual.qual;
1119         res->res.noise = iwe->u.qual.noise;
1120         res->res.level = iwe->u.qual.level;
1121         if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
1122                 res->res.flags |= WPA_SCAN_QUAL_INVALID;
1123         if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
1124                 res->res.flags |= WPA_SCAN_LEVEL_INVALID;
1125         if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
1126                 res->res.flags |= WPA_SCAN_NOISE_INVALID;
1127         if (iwe->u.qual.updated & IW_QUAL_DBM)
1128                 res->res.flags |= WPA_SCAN_LEVEL_DBM;
1129 }
1130
1131
1132 static void wext_get_scan_encode(struct iw_event *iwe,
1133                                  struct wext_scan_data *res)
1134 {
1135         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1136                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1137 }
1138
1139
1140 static void wext_get_scan_rate(struct iw_event *iwe,
1141                                struct wext_scan_data *res, char *pos,
1142                                char *end)
1143 {
1144         int maxrate;
1145         char *custom = pos + IW_EV_LCP_LEN;
1146         struct iw_param p;
1147         size_t clen;
1148
1149         clen = iwe->len;
1150         if (custom + clen > end)
1151                 return;
1152         maxrate = 0;
1153         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1154                 /* Note: may be misaligned, make a local, aligned copy */
1155                 os_memcpy(&p, custom, sizeof(struct iw_param));
1156                 if (p.value > maxrate)
1157                         maxrate = p.value;
1158                 clen -= sizeof(struct iw_param);
1159                 custom += sizeof(struct iw_param);
1160         }
1161
1162         /* Convert the maxrate from WE-style (b/s units) to
1163          * 802.11 rates (500000 b/s units).
1164          */
1165         res->maxrate = maxrate / 500000;
1166 }
1167
1168
1169 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1170                                     struct wext_scan_data *res, char *custom,
1171                                     char *end)
1172 {
1173         char *genie, *gpos, *gend;
1174         u8 *tmp;
1175
1176         if (iwe->u.data.length == 0)
1177                 return;
1178
1179         gpos = genie = custom;
1180         gend = genie + iwe->u.data.length;
1181         if (gend > end) {
1182                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1183                 return;
1184         }
1185
1186         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1187         if (tmp == NULL)
1188                 return;
1189         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1190         res->ie = tmp;
1191         res->ie_len += gend - gpos;
1192 }
1193
1194
1195 static void wext_get_scan_custom(struct iw_event *iwe,
1196                                  struct wext_scan_data *res, char *custom,
1197                                  char *end)
1198 {
1199         size_t clen;
1200         u8 *tmp;
1201
1202         clen = iwe->u.data.length;
1203         if (custom + clen > end)
1204                 return;
1205
1206         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1207                 char *spos;
1208                 int bytes;
1209                 spos = custom + 7;
1210                 bytes = custom + clen - spos;
1211                 if (bytes & 1 || bytes == 0)
1212                         return;
1213                 bytes /= 2;
1214                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1215                 if (tmp == NULL)
1216                         return;
1217                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1218                 res->ie = tmp;
1219                 res->ie_len += bytes;
1220         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1221                 char *spos;
1222                 int bytes;
1223                 spos = custom + 7;
1224                 bytes = custom + clen - spos;
1225                 if (bytes & 1 || bytes == 0)
1226                         return;
1227                 bytes /= 2;
1228                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1229                 if (tmp == NULL)
1230                         return;
1231                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1232                 res->ie = tmp;
1233                 res->ie_len += bytes;
1234         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1235                 char *spos;
1236                 int bytes;
1237                 u8 bin[8];
1238                 spos = custom + 4;
1239                 bytes = custom + clen - spos;
1240                 if (bytes != 16) {
1241                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1242                         return;
1243                 }
1244                 bytes /= 2;
1245                 hexstr2bin(spos, bin, bytes);
1246                 res->res.tsf += WPA_GET_BE64(bin);
1247         }
1248 }
1249
1250
1251 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1252 {
1253         return drv->we_version_compiled > 18 &&
1254                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1255                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1256 }
1257
1258
1259 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1260                                            struct wext_scan_data *data)
1261 {
1262         struct wpa_scan_res **tmp;
1263         struct wpa_scan_res *r;
1264         size_t extra_len;
1265         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1266
1267         /* Figure out whether we need to fake any IEs */
1268         pos = data->ie;
1269         end = pos + data->ie_len;
1270         while (pos && pos + 1 < end) {
1271                 if (pos + 2 + pos[1] > end)
1272                         break;
1273                 if (pos[0] == WLAN_EID_SSID)
1274                         ssid_ie = pos;
1275                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1276                         rate_ie = pos;
1277                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1278                         rate_ie = pos;
1279                 pos += 2 + pos[1];
1280         }
1281
1282         extra_len = 0;
1283         if (ssid_ie == NULL)
1284                 extra_len += 2 + data->ssid_len;
1285         if (rate_ie == NULL && data->maxrate)
1286                 extra_len += 3;
1287
1288         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1289         if (r == NULL)
1290                 return;
1291         os_memcpy(r, &data->res, sizeof(*r));
1292         r->ie_len = extra_len + data->ie_len;
1293         pos = (u8 *) (r + 1);
1294         if (ssid_ie == NULL) {
1295                 /*
1296                  * Generate a fake SSID IE since the driver did not report
1297                  * a full IE list.
1298                  */
1299                 *pos++ = WLAN_EID_SSID;
1300                 *pos++ = data->ssid_len;
1301                 os_memcpy(pos, data->ssid, data->ssid_len);
1302                 pos += data->ssid_len;
1303         }
1304         if (rate_ie == NULL && data->maxrate) {
1305                 /*
1306                  * Generate a fake Supported Rates IE since the driver did not
1307                  * report a full IE list.
1308                  */
1309                 *pos++ = WLAN_EID_SUPP_RATES;
1310                 *pos++ = 1;
1311                 *pos++ = data->maxrate;
1312         }
1313         if (data->ie)
1314                 os_memcpy(pos, data->ie, data->ie_len);
1315
1316         tmp = os_realloc(res->res,
1317                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1318         if (tmp == NULL) {
1319                 os_free(r);
1320                 return;
1321         }
1322         tmp[res->num++] = r;
1323         res->res = tmp;
1324 }
1325
1326
1327 /**
1328  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1329  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1330  * Returns: Scan results on success, -1 on failure
1331  */
1332 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1333 {
1334         struct wpa_driver_wext_data *drv = priv;
1335         size_t ap_num = 0, len;
1336         int first;
1337         u8 *res_buf;
1338         struct iw_event iwe_buf, *iwe = &iwe_buf;
1339         char *pos, *end, *custom;
1340         struct wpa_scan_results *res;
1341         struct wext_scan_data data;
1342
1343         res_buf = wpa_driver_wext_giwscan(drv, &len);
1344         if (res_buf == NULL)
1345                 return NULL;
1346
1347         ap_num = 0;
1348         first = 1;
1349
1350         res = os_zalloc(sizeof(*res));
1351         if (res == NULL) {
1352                 os_free(res_buf);
1353                 return NULL;
1354         }
1355
1356         pos = (char *) res_buf;
1357         end = (char *) res_buf + len;
1358         os_memset(&data, 0, sizeof(data));
1359
1360         while (pos + IW_EV_LCP_LEN <= end) {
1361                 /* Event data may be unaligned, so make a local, aligned copy
1362                  * before processing. */
1363                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1364                 if (iwe->len <= IW_EV_LCP_LEN)
1365                         break;
1366
1367                 custom = pos + IW_EV_POINT_LEN;
1368                 if (wext_19_iw_point(drv, iwe->cmd)) {
1369                         /* WE-19 removed the pointer from struct iw_point */
1370                         char *dpos = (char *) &iwe_buf.u.data.length;
1371                         int dlen = dpos - (char *) &iwe_buf;
1372                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1373                                   sizeof(struct iw_event) - dlen);
1374                 } else {
1375                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1376                         custom += IW_EV_POINT_OFF;
1377                 }
1378
1379                 switch (iwe->cmd) {
1380                 case SIOCGIWAP:
1381                         if (!first)
1382                                 wpa_driver_wext_add_scan_entry(res, &data);
1383                         first = 0;
1384                         os_free(data.ie);
1385                         os_memset(&data, 0, sizeof(data));
1386                         os_memcpy(data.res.bssid,
1387                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1388                         break;
1389                 case SIOCGIWMODE:
1390                         wext_get_scan_mode(iwe, &data);
1391                         break;
1392                 case SIOCGIWESSID:
1393                         wext_get_scan_ssid(iwe, &data, custom, end);
1394                         break;
1395                 case SIOCGIWFREQ:
1396                         wext_get_scan_freq(iwe, &data);
1397                         break;
1398                 case IWEVQUAL:
1399                         wext_get_scan_qual(iwe, &data);
1400                         break;
1401                 case SIOCGIWENCODE:
1402                         wext_get_scan_encode(iwe, &data);
1403                         break;
1404                 case SIOCGIWRATE:
1405                         wext_get_scan_rate(iwe, &data, pos, end);
1406                         break;
1407                 case IWEVGENIE:
1408                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1409                         break;
1410                 case IWEVCUSTOM:
1411                         wext_get_scan_custom(iwe, &data, custom, end);
1412                         break;
1413                 }
1414
1415                 pos += iwe->len;
1416         }
1417         os_free(res_buf);
1418         res_buf = NULL;
1419         if (!first)
1420                 wpa_driver_wext_add_scan_entry(res, &data);
1421         os_free(data.ie);
1422
1423         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1424                    (unsigned long) len, (unsigned long) res->num);
1425
1426         return res;
1427 }
1428
1429
1430 static int wpa_driver_wext_get_range(void *priv)
1431 {
1432         struct wpa_driver_wext_data *drv = priv;
1433         struct iw_range *range;
1434         struct iwreq iwr;
1435         int minlen;
1436         size_t buflen;
1437
1438         /*
1439          * Use larger buffer than struct iw_range in order to allow the
1440          * structure to grow in the future.
1441          */
1442         buflen = sizeof(struct iw_range) + 500;
1443         range = os_zalloc(buflen);
1444         if (range == NULL)
1445                 return -1;
1446
1447         os_memset(&iwr, 0, sizeof(iwr));
1448         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1449         iwr.u.data.pointer = (caddr_t) range;
1450         iwr.u.data.length = buflen;
1451
1452         minlen = ((char *) &range->enc_capa) - (char *) range +
1453                 sizeof(range->enc_capa);
1454
1455         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1456                 perror("ioctl[SIOCGIWRANGE]");
1457                 os_free(range);
1458                 return -1;
1459         } else if (iwr.u.data.length >= minlen &&
1460                    range->we_version_compiled >= 18) {
1461                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1462                            "WE(source)=%d enc_capa=0x%x",
1463                            range->we_version_compiled,
1464                            range->we_version_source,
1465                            range->enc_capa);
1466                 drv->has_capability = 1;
1467                 drv->we_version_compiled = range->we_version_compiled;
1468                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1469                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1470                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1471                 }
1472                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1473                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1474                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1475                 }
1476                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1477                         WPA_DRIVER_CAPA_ENC_WEP104;
1478                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1479                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1480                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1481                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1482                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1483                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1484                 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1485                         WPA_DRIVER_AUTH_SHARED |
1486                         WPA_DRIVER_AUTH_LEAP;
1487                 drv->capa.max_scan_ssids = 1;
1488
1489                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1490                            "flags 0x%x",
1491                            drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1492         } else {
1493                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1494                            "assuming WPA is not supported");
1495         }
1496
1497         os_free(range);
1498         return 0;
1499 }
1500
1501
1502 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1503                                    const u8 *psk)
1504 {
1505         struct iw_encode_ext *ext;
1506         struct iwreq iwr;
1507         int ret;
1508
1509         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1510
1511         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1512                 return 0;
1513
1514         if (!psk)
1515                 return 0;
1516
1517         os_memset(&iwr, 0, sizeof(iwr));
1518         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1519
1520         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1521         if (ext == NULL)
1522                 return -1;
1523
1524         iwr.u.encoding.pointer = (caddr_t) ext;
1525         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1526         ext->key_len = PMK_LEN;
1527         os_memcpy(&ext->key, psk, ext->key_len);
1528         ext->alg = IW_ENCODE_ALG_PMK;
1529
1530         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1531         if (ret < 0)
1532                 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1533         os_free(ext);
1534
1535         return ret;
1536 }
1537
1538
1539 static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg,
1540                                        const u8 *addr, int key_idx,
1541                                        int set_tx, const u8 *seq,
1542                                        size_t seq_len,
1543                                        const u8 *key, size_t key_len)
1544 {
1545         struct wpa_driver_wext_data *drv = priv;
1546         struct iwreq iwr;
1547         int ret = 0;
1548         struct iw_encode_ext *ext;
1549
1550         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1551                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1552                            __FUNCTION__, (unsigned long) seq_len);
1553                 return -1;
1554         }
1555
1556         ext = os_zalloc(sizeof(*ext) + key_len);
1557         if (ext == NULL)
1558                 return -1;
1559         os_memset(&iwr, 0, sizeof(iwr));
1560         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1561         iwr.u.encoding.flags = key_idx + 1;
1562         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1563         if (alg == WPA_ALG_NONE)
1564                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1565         iwr.u.encoding.pointer = (caddr_t) ext;
1566         iwr.u.encoding.length = sizeof(*ext) + key_len;
1567
1568         if (addr == NULL ||
1569             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1570                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1571         if (set_tx)
1572                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1573
1574         ext->addr.sa_family = ARPHRD_ETHER;
1575         if (addr)
1576                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1577         else
1578                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1579         if (key && key_len) {
1580                 os_memcpy(ext + 1, key, key_len);
1581                 ext->key_len = key_len;
1582         }
1583         switch (alg) {
1584         case WPA_ALG_NONE:
1585                 ext->alg = IW_ENCODE_ALG_NONE;
1586                 break;
1587         case WPA_ALG_WEP:
1588                 ext->alg = IW_ENCODE_ALG_WEP;
1589                 break;
1590         case WPA_ALG_TKIP:
1591                 ext->alg = IW_ENCODE_ALG_TKIP;
1592                 break;
1593         case WPA_ALG_CCMP:
1594                 ext->alg = IW_ENCODE_ALG_CCMP;
1595                 break;
1596         case WPA_ALG_PMK:
1597                 ext->alg = IW_ENCODE_ALG_PMK;
1598                 break;
1599 #ifdef CONFIG_IEEE80211W
1600         case WPA_ALG_IGTK:
1601                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1602                 break;
1603 #endif /* CONFIG_IEEE80211W */
1604         default:
1605                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1606                            __FUNCTION__, alg);
1607                 os_free(ext);
1608                 return -1;
1609         }
1610
1611         if (seq && seq_len) {
1612                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1613                 os_memcpy(ext->rx_seq, seq, seq_len);
1614         }
1615
1616         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1617                 ret = errno == EOPNOTSUPP ? -2 : -1;
1618                 if (errno == ENODEV) {
1619                         /*
1620                          * ndiswrapper seems to be returning incorrect error
1621                          * code.. */
1622                         ret = -2;
1623                 }
1624
1625                 perror("ioctl[SIOCSIWENCODEEXT]");
1626         }
1627
1628         os_free(ext);
1629         return ret;
1630 }
1631
1632
1633 /**
1634  * wpa_driver_wext_set_key - Configure encryption key
1635  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1636  * @priv: Private driver interface data
1637  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1638  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1639  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1640  *      broadcast/default keys
1641  * @key_idx: key index (0..3), usually 0 for unicast keys
1642  * @set_tx: Configure this key as the default Tx key (only used when
1643  *      driver does not support separate unicast/individual key
1644  * @seq: Sequence number/packet number, seq_len octets, the next
1645  *      packet number to be used for in replay protection; configured
1646  *      for Rx keys (in most cases, this is only used with broadcast
1647  *      keys and set to zero for unicast keys)
1648  * @seq_len: Length of the seq, depends on the algorithm:
1649  *      TKIP: 6 octets, CCMP: 6 octets
1650  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1651  *      8-byte Rx Mic Key
1652  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1653  *      TKIP: 32, CCMP: 16)
1654  * Returns: 0 on success, -1 on failure
1655  *
1656  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1657  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1658  */
1659 int wpa_driver_wext_set_key(const char *ifname, void *priv, enum wpa_alg alg,
1660                             const u8 *addr, int key_idx,
1661                             int set_tx, const u8 *seq, size_t seq_len,
1662                             const u8 *key, size_t key_len)
1663 {
1664         struct wpa_driver_wext_data *drv = priv;
1665         struct iwreq iwr;
1666         int ret = 0;
1667
1668         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1669                    "key_len=%lu",
1670                    __FUNCTION__, alg, key_idx, set_tx,
1671                    (unsigned long) seq_len, (unsigned long) key_len);
1672
1673         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1674                                           seq, seq_len, key, key_len);
1675         if (ret == 0)
1676                 return 0;
1677
1678         if (ret == -2 &&
1679             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1680                 wpa_printf(MSG_DEBUG, "Driver did not support "
1681                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1682                 ret = 0;
1683         } else {
1684                 wpa_printf(MSG_DEBUG, "Driver did not support "
1685                            "SIOCSIWENCODEEXT");
1686                 return ret;
1687         }
1688
1689         os_memset(&iwr, 0, sizeof(iwr));
1690         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1691         iwr.u.encoding.flags = key_idx + 1;
1692         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1693         if (alg == WPA_ALG_NONE)
1694                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1695         iwr.u.encoding.pointer = (caddr_t) key;
1696         iwr.u.encoding.length = key_len;
1697
1698         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1699                 perror("ioctl[SIOCSIWENCODE]");
1700                 ret = -1;
1701         }
1702
1703         if (set_tx && alg != WPA_ALG_NONE) {
1704                 os_memset(&iwr, 0, sizeof(iwr));
1705                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1706                 iwr.u.encoding.flags = key_idx + 1;
1707                 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1708                 iwr.u.encoding.pointer = (caddr_t) NULL;
1709                 iwr.u.encoding.length = 0;
1710                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1711                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1712                         ret = -1;
1713                 }
1714         }
1715
1716         return ret;
1717 }
1718
1719
1720 static int wpa_driver_wext_set_countermeasures(void *priv,
1721                                                int enabled)
1722 {
1723         struct wpa_driver_wext_data *drv = priv;
1724         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1725         return wpa_driver_wext_set_auth_param(drv,
1726                                               IW_AUTH_TKIP_COUNTERMEASURES,
1727                                               enabled);
1728 }
1729
1730
1731 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1732                                                 int enabled)
1733 {
1734         struct wpa_driver_wext_data *drv = priv;
1735         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1736         drv->use_crypt = enabled;
1737         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1738                                               enabled);
1739 }
1740
1741
1742 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1743                                 const u8 *addr, int cmd, int reason_code)
1744 {
1745         struct iwreq iwr;
1746         struct iw_mlme mlme;
1747         int ret = 0;
1748
1749         os_memset(&iwr, 0, sizeof(iwr));
1750         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1751         os_memset(&mlme, 0, sizeof(mlme));
1752         mlme.cmd = cmd;
1753         mlme.reason_code = reason_code;
1754         mlme.addr.sa_family = ARPHRD_ETHER;
1755         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1756         iwr.u.data.pointer = (caddr_t) &mlme;
1757         iwr.u.data.length = sizeof(mlme);
1758
1759         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1760                 perror("ioctl[SIOCSIWMLME]");
1761                 ret = -1;
1762         }
1763
1764         return ret;
1765 }
1766
1767
1768 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
1769 {
1770         struct iwreq iwr;
1771         const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
1772         u8 ssid[32];
1773         int i;
1774
1775         /*
1776          * Only force-disconnect when the card is in infrastructure mode,
1777          * otherwise the driver might interpret the cleared BSSID and random
1778          * SSID as an attempt to create a new ad-hoc network.
1779          */
1780         os_memset(&iwr, 0, sizeof(iwr));
1781         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1782         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
1783                 perror("ioctl[SIOCGIWMODE]");
1784                 iwr.u.mode = IW_MODE_INFRA;
1785         }
1786
1787         if (iwr.u.mode == IW_MODE_INFRA) {
1788                 /*
1789                  * Clear the BSSID selection and set a random SSID to make sure
1790                  * the driver will not be trying to associate with something
1791                  * even if it does not understand SIOCSIWMLME commands (or
1792                  * tries to associate automatically after deauth/disassoc).
1793                  */
1794                 wpa_driver_wext_set_bssid(drv, null_bssid);
1795
1796                 for (i = 0; i < 32; i++)
1797                         ssid[i] = rand() & 0xFF;
1798                 wpa_driver_wext_set_ssid(drv, ssid, 32);
1799         }
1800 }
1801
1802
1803 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1804                                           int reason_code)
1805 {
1806         struct wpa_driver_wext_data *drv = priv;
1807         int ret;
1808         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1809         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1810         wpa_driver_wext_disconnect(drv);
1811         return ret;
1812 }
1813
1814
1815 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
1816                                         int reason_code)
1817 {
1818         struct wpa_driver_wext_data *drv = priv;
1819         int ret;
1820         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1821         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC, reason_code);
1822         wpa_driver_wext_disconnect(drv);
1823         return ret;
1824 }
1825
1826
1827 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
1828                                       size_t ie_len)
1829 {
1830         struct wpa_driver_wext_data *drv = priv;
1831         struct iwreq iwr;
1832         int ret = 0;
1833
1834         os_memset(&iwr, 0, sizeof(iwr));
1835         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1836         iwr.u.data.pointer = (caddr_t) ie;
1837         iwr.u.data.length = ie_len;
1838
1839         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1840                 perror("ioctl[SIOCSIWGENIE]");
1841                 ret = -1;
1842         }
1843
1844         return ret;
1845 }
1846
1847
1848 int wpa_driver_wext_cipher2wext(int cipher)
1849 {
1850         switch (cipher) {
1851         case CIPHER_NONE:
1852                 return IW_AUTH_CIPHER_NONE;
1853         case CIPHER_WEP40:
1854                 return IW_AUTH_CIPHER_WEP40;
1855         case CIPHER_TKIP:
1856                 return IW_AUTH_CIPHER_TKIP;
1857         case CIPHER_CCMP:
1858                 return IW_AUTH_CIPHER_CCMP;
1859         case CIPHER_WEP104:
1860                 return IW_AUTH_CIPHER_WEP104;
1861         default:
1862                 return 0;
1863         }
1864 }
1865
1866
1867 int wpa_driver_wext_keymgmt2wext(int keymgmt)
1868 {
1869         switch (keymgmt) {
1870         case KEY_MGMT_802_1X:
1871         case KEY_MGMT_802_1X_NO_WPA:
1872                 return IW_AUTH_KEY_MGMT_802_1X;
1873         case KEY_MGMT_PSK:
1874                 return IW_AUTH_KEY_MGMT_PSK;
1875         default:
1876                 return 0;
1877         }
1878 }
1879
1880
1881 static int
1882 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
1883                                   struct wpa_driver_associate_params *params)
1884 {
1885         struct iwreq iwr;
1886         int ret = 0;
1887
1888         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1889                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1890
1891         os_memset(&iwr, 0, sizeof(iwr));
1892         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1893         /* Just changing mode, not actual keys */
1894         iwr.u.encoding.flags = 0;
1895         iwr.u.encoding.pointer = (caddr_t) NULL;
1896         iwr.u.encoding.length = 0;
1897
1898         /*
1899          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
1900          * different things. Here they are used to indicate Open System vs.
1901          * Shared Key authentication algorithm. However, some drivers may use
1902          * them to select between open/restricted WEP encrypted (open = allow
1903          * both unencrypted and encrypted frames; restricted = only allow
1904          * encrypted frames).
1905          */
1906
1907         if (!drv->use_crypt) {
1908                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1909         } else {
1910                 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
1911                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
1912                 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
1913                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
1914         }
1915
1916         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1917                 perror("ioctl[SIOCSIWENCODE]");
1918                 ret = -1;
1919         }
1920
1921         return ret;
1922 }
1923
1924
1925 int wpa_driver_wext_associate(void *priv,
1926                               struct wpa_driver_associate_params *params)
1927 {
1928         struct wpa_driver_wext_data *drv = priv;
1929         int ret = 0;
1930         int allow_unencrypted_eapol;
1931         int value;
1932
1933         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1934
1935         if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
1936             < 0)
1937                 ret = -1;
1938         if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
1939                 ret = -1;
1940         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
1941                 ret = -1;
1942
1943         /*
1944          * If the driver did not support SIOCSIWAUTH, fallback to
1945          * SIOCSIWENCODE here.
1946          */
1947         if (drv->auth_alg_fallback &&
1948             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
1949                 ret = -1;
1950
1951         if (!params->bssid &&
1952             wpa_driver_wext_set_bssid(drv, NULL) < 0)
1953                 ret = -1;
1954
1955         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
1956          * from configuration, not from here, where only the selected suite is
1957          * available */
1958         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
1959             < 0)
1960                 ret = -1;
1961         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
1962                 value = IW_AUTH_WPA_VERSION_DISABLED;
1963         else if (params->wpa_ie[0] == WLAN_EID_RSN)
1964                 value = IW_AUTH_WPA_VERSION_WPA2;
1965         else
1966                 value = IW_AUTH_WPA_VERSION_WPA;
1967         if (wpa_driver_wext_set_auth_param(drv,
1968                                            IW_AUTH_WPA_VERSION, value) < 0)
1969                 ret = -1;
1970         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
1971         if (wpa_driver_wext_set_auth_param(drv,
1972                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
1973                 ret = -1;
1974         value = wpa_driver_wext_cipher2wext(params->group_suite);
1975         if (wpa_driver_wext_set_auth_param(drv,
1976                                            IW_AUTH_CIPHER_GROUP, value) < 0)
1977                 ret = -1;
1978         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
1979         if (wpa_driver_wext_set_auth_param(drv,
1980                                            IW_AUTH_KEY_MGMT, value) < 0)
1981                 ret = -1;
1982         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
1983                 params->pairwise_suite != CIPHER_NONE ||
1984                 params->group_suite != CIPHER_NONE ||
1985                 params->wpa_ie_len;
1986         if (wpa_driver_wext_set_auth_param(drv,
1987                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
1988                 ret = -1;
1989
1990         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
1991          * not using WPA. IEEE 802.1X specifies that these frames are not
1992          * encrypted, but WPA encrypts them when pairwise keys are in use. */
1993         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
1994             params->key_mgmt_suite == KEY_MGMT_PSK)
1995                 allow_unencrypted_eapol = 0;
1996         else
1997                 allow_unencrypted_eapol = 1;
1998
1999         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2000                 ret = -1;
2001         if (wpa_driver_wext_set_auth_param(drv,
2002                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2003                                            allow_unencrypted_eapol) < 0)
2004                 ret = -1;
2005 #ifdef CONFIG_IEEE80211W
2006         switch (params->mgmt_frame_protection) {
2007         case NO_MGMT_FRAME_PROTECTION:
2008                 value = IW_AUTH_MFP_DISABLED;
2009                 break;
2010         case MGMT_FRAME_PROTECTION_OPTIONAL:
2011                 value = IW_AUTH_MFP_OPTIONAL;
2012                 break;
2013         case MGMT_FRAME_PROTECTION_REQUIRED:
2014                 value = IW_AUTH_MFP_REQUIRED;
2015                 break;
2016         };
2017         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2018                 ret = -1;
2019 #endif /* CONFIG_IEEE80211W */
2020         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2021                 ret = -1;
2022         if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2023                 ret = -1;
2024         if (params->bssid &&
2025             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2026                 ret = -1;
2027
2028         return ret;
2029 }
2030
2031
2032 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2033 {
2034         struct wpa_driver_wext_data *drv = priv;
2035         int algs = 0, res;
2036
2037         if (auth_alg & WPA_AUTH_ALG_OPEN)
2038                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2039         if (auth_alg & WPA_AUTH_ALG_SHARED)
2040                 algs |= IW_AUTH_ALG_SHARED_KEY;
2041         if (auth_alg & WPA_AUTH_ALG_LEAP)
2042                 algs |= IW_AUTH_ALG_LEAP;
2043         if (algs == 0) {
2044                 /* at least one algorithm should be set */
2045                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2046         }
2047
2048         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2049                                              algs);
2050         drv->auth_alg_fallback = res == -2;
2051         return res;
2052 }
2053
2054
2055 /**
2056  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2057  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2058  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2059  * Returns: 0 on success, -1 on failure
2060  */
2061 int wpa_driver_wext_set_mode(void *priv, int mode)
2062 {
2063         struct wpa_driver_wext_data *drv = priv;
2064         struct iwreq iwr;
2065         int ret = -1, flags;
2066         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2067
2068         os_memset(&iwr, 0, sizeof(iwr));
2069         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2070         iwr.u.mode = new_mode;
2071         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2072                 ret = 0;
2073                 goto done;
2074         }
2075
2076         if (errno != EBUSY) {
2077                 perror("ioctl[SIOCSIWMODE]");
2078                 goto done;
2079         }
2080
2081         /* mac80211 doesn't allow mode changes while the device is up, so if
2082          * the device isn't in the mode we're about to change to, take device
2083          * down, try to set the mode again, and bring it back up.
2084          */
2085         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2086                 perror("ioctl[SIOCGIWMODE]");
2087                 goto done;
2088         }
2089
2090         if (iwr.u.mode == new_mode) {
2091                 ret = 0;
2092                 goto done;
2093         }
2094
2095         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2096                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2097
2098                 /* Try to set the mode again while the interface is down */
2099                 iwr.u.mode = new_mode;
2100                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2101                         perror("ioctl[SIOCSIWMODE]");
2102                 else
2103                         ret = 0;
2104
2105                 /* Ignore return value of get_ifflags to ensure that the device
2106                  * is always up like it was before this function was called.
2107                  */
2108                 (void) wpa_driver_wext_get_ifflags(drv, &flags);
2109                 (void) wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2110         }
2111
2112 done:
2113         return ret;
2114 }
2115
2116
2117 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2118                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2119 {
2120         struct iwreq iwr;
2121         struct iw_pmksa pmksa;
2122         int ret = 0;
2123
2124         os_memset(&iwr, 0, sizeof(iwr));
2125         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2126         os_memset(&pmksa, 0, sizeof(pmksa));
2127         pmksa.cmd = cmd;
2128         pmksa.bssid.sa_family = ARPHRD_ETHER;
2129         if (bssid)
2130                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2131         if (pmkid)
2132                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2133         iwr.u.data.pointer = (caddr_t) &pmksa;
2134         iwr.u.data.length = sizeof(pmksa);
2135
2136         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2137                 if (errno != EOPNOTSUPP)
2138                         perror("ioctl[SIOCSIWPMKSA]");
2139                 ret = -1;
2140         }
2141
2142         return ret;
2143 }
2144
2145
2146 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2147                                      const u8 *pmkid)
2148 {
2149         struct wpa_driver_wext_data *drv = priv;
2150         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2151 }
2152
2153
2154 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2155                                         const u8 *pmkid)
2156 {
2157         struct wpa_driver_wext_data *drv = priv;
2158         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2159 }
2160
2161
2162 static int wpa_driver_wext_flush_pmkid(void *priv)
2163 {
2164         struct wpa_driver_wext_data *drv = priv;
2165         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2166 }
2167
2168
2169 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2170 {
2171         struct wpa_driver_wext_data *drv = priv;
2172         if (!drv->has_capability)
2173                 return -1;
2174         os_memcpy(capa, &drv->capa, sizeof(*capa));
2175         return 0;
2176 }
2177
2178
2179 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2180                                         const char *ifname)
2181 {
2182         if (ifname == NULL) {
2183                 drv->ifindex2 = -1;
2184                 return 0;
2185         }
2186
2187         drv->ifindex2 = if_nametoindex(ifname);
2188         if (drv->ifindex2 <= 0)
2189                 return -1;
2190
2191         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2192                    "wireless events", drv->ifindex2, ifname);
2193
2194         return 0;
2195 }
2196
2197
2198 int wpa_driver_wext_set_operstate(void *priv, int state)
2199 {
2200         struct wpa_driver_wext_data *drv = priv;
2201
2202         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2203                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2204         drv->operstate = state;
2205         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
2206                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
2207 }
2208
2209
2210 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2211 {
2212         return drv->we_version_compiled;
2213 }
2214
2215
2216 const struct wpa_driver_ops wpa_driver_wext_ops = {
2217         .name = "wext",
2218         .desc = "Linux wireless extensions (generic)",
2219         .get_bssid = wpa_driver_wext_get_bssid,
2220         .get_ssid = wpa_driver_wext_get_ssid,
2221         .set_key = wpa_driver_wext_set_key,
2222         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2223         .scan2 = wpa_driver_wext_scan,
2224         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2225         .deauthenticate = wpa_driver_wext_deauthenticate,
2226         .disassociate = wpa_driver_wext_disassociate,
2227         .associate = wpa_driver_wext_associate,
2228         .init = wpa_driver_wext_init,
2229         .deinit = wpa_driver_wext_deinit,
2230         .add_pmkid = wpa_driver_wext_add_pmkid,
2231         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2232         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2233         .get_capa = wpa_driver_wext_get_capa,
2234         .set_operstate = wpa_driver_wext_set_operstate,
2235 };