wpa_supplicant/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 #include <net/if.h>
  25
  26 #include "wireless_copy.h"
  27 #include "common.h"
  28 #include "driver.h"
  29 #include "eloop.h"
  30 #include "priv_netlink.h"
  31 #include "driver_wext.h"
  32 #include "ieee802_11_defs.h"
  33 #include "wpa_common.h"
  34 #include "wpa_ctrl.h"
  35 #include "wpa_supplicant_i.h"
  36 #include "config_ssid.h"
  37
  38
  39 static int wpa_driver_wext_flush_pmkid(void *priv);
  40 static int wpa_driver_wext_get_range(void *priv);
  41 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
  42 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv);
  43
  44
  45 static int wpa_driver_wext_send_oper_ifla(struct wpa_driver_wext_data *drv,
  46                                           int linkmode, int operstate)
  47 {
  48         struct {
  49                 struct nlmsghdr hdr;
  50                 struct ifinfomsg ifinfo;
  51                 char opts[16];
  52         } req;
  53         struct rtattr *rta;
  54         static int nl_seq;
  55         ssize_t ret;
  56
  57         os_memset(&req, 0, sizeof(req));
  58
  59         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
  60         req.hdr.nlmsg_type = RTM_SETLINK;
  61         req.hdr.nlmsg_flags = NLM_F_REQUEST;
  62         req.hdr.nlmsg_seq = ++nl_seq;
  63         req.hdr.nlmsg_pid = 0;
  64
  65         req.ifinfo.ifi_family = AF_UNSPEC;
  66         req.ifinfo.ifi_type = 0;
  67         req.ifinfo.ifi_index = drv->ifindex;
  68         req.ifinfo.ifi_flags = 0;
  69         req.ifinfo.ifi_change = 0;
  70
  71         if (linkmode != -1) {
  72                 rta = aliasing_hide_typecast(
  73                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
  74                         struct rtattr);
  75                 rta->rta_type = IFLA_LINKMODE;
  76                 rta->rta_len = RTA_LENGTH(sizeof(char));
  77                 *((char *) RTA_DATA(rta)) = linkmode;
  78                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
  79                         RTA_LENGTH(sizeof(char));
  80         }
  81         if (operstate != -1) {
  82                 rta = (struct rtattr *)
  83                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
  84                 rta->rta_type = IFLA_OPERSTATE;
  85                 rta->rta_len = RTA_LENGTH(sizeof(char));
  86                 *((char *) RTA_DATA(rta)) = operstate;
  87                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
  88                         RTA_LENGTH(sizeof(char));
  89         }
  90
  91         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
  92                    linkmode, operstate);
  93
  94         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
  95         if (ret < 0) {
  96                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
  97                            "%s (assume operstate is not supported)",
  98                            strerror(errno));
  99         }
 100
 101         return ret < 0 ? -1 : 0;
 102 }
 103
 104
 105 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
 106                                    int idx, u32 value)
 107 {
 108         struct iwreq iwr;
 109         int ret = 0;
 110
 111         os_memset(&iwr, 0, sizeof(iwr));
 112         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 113         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 114         iwr.u.param.value = value;
 115
 116         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 117                 if (errno != EOPNOTSUPP) {
 118                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 119                                    "value 0x%x) failed: %s)",
 120                                    idx, value, strerror(errno));
 121                 }
 122                 ret = errno == EOPNOTSUPP ? -2 : -1;
 123         }
 124
 125         return ret;
 126 }
 127
 128
 129 /**
 130  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
 131  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 132  * @bssid: Buffer for BSSID
 133  * Returns: 0 on success, -1 on failure
 134  */
 135 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
 136 {
 137         struct wpa_driver_wext_data *drv = priv;
 138         struct iwreq iwr;
 139         int ret = 0;
 140
 141         os_memset(&iwr, 0, sizeof(iwr));
 142         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 143
 144         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 145                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWAP]");
 146                 ret = -1;
 147         }
 148         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 149
 150         return ret;
 151 }
 152
 153
 154 /**
 155  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
 156  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 157  * @bssid: BSSID
 158  * Returns: 0 on success, -1 on failure
 159  */
 160 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
 161 {
 162         struct wpa_driver_wext_data *drv = priv;
 163         struct iwreq iwr;
 164         int ret = 0;
 165
 166         os_memset(&iwr, 0, sizeof(iwr));
 167         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 168         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 169         if (bssid)
 170                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 171         else
 172                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 173
 174         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 175                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWAP]");
 176                 ret = -1;
 177         }
 178
 179         return ret;
 180 }
 181
 182
 183 /**
 184  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 185  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 186  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 187  * Returns: SSID length on success, -1 on failure
 188  */
 189 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 190 {
 191         struct wpa_driver_wext_data *drv = priv;
 192         struct iwreq iwr;
 193         int ret = 0;
 194
 195         os_memset(&iwr, 0, sizeof(iwr));
 196         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 197         iwr.u.essid.pointer = (caddr_t) ssid;
 198         iwr.u.essid.length = 32;
 199
 200         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 201                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWESSID]");
 202                 ret = -1;
 203         } else {
 204                 ret = iwr.u.essid.length;
 205                 if (ret > 32)
 206                         ret = 32;
 207                 /* Some drivers include nul termination in the SSID, so let's
 208                  * remove it here before further processing. WE-21 changes this
 209                  * to explicitly require the length _not_ to include nul
 210                  * termination. */
 211                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 212                     drv->we_version_compiled < 21)
 213                         ret--;
 214         }
 215
 216         return ret;
 217 }
 218
 219
 220 /**
 221  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 222  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 223  * @ssid: SSID
 224  * @ssid_len: Length of SSID (0..32)
 225  * Returns: 0 on success, -1 on failure
 226  */
 227 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 228 {
 229         struct wpa_driver_wext_data *drv = priv;
 230         struct iwreq iwr;
 231         int ret = 0;
 232         char buf[33];
 233
 234         if (ssid_len > 32)
 235                 return -1;
 236
 237         os_memset(&iwr, 0, sizeof(iwr));
 238         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 239         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 240         iwr.u.essid.flags = (ssid_len != 0);
 241         os_memset(buf, 0, sizeof(buf));
 242         os_memcpy(buf, ssid, ssid_len);
 243         iwr.u.essid.pointer = (caddr_t) buf;
 244         if (drv->we_version_compiled < 21) {
 245                 /* For historic reasons, set SSID length to include one extra
 246                  * character, C string nul termination, even though SSID is
 247                  * really an octet string that should not be presented as a C
 248                  * string. Some Linux drivers decrement the length by one and
 249                  * can thus end up missing the last octet of the SSID if the
 250                  * length is not incremented here. WE-21 changes this to
 251                  * explicitly require the length _not_ to include nul
 252                  * termination. */
 253                 if (ssid_len)
 254                         ssid_len++;
 255         }
 256         iwr.u.essid.length = ssid_len;
 257
 258         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 259                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWESSID]");
 260                 ret = -1;
 261         }
 262
 263         return ret;
 264 }
 265
 266
 267 /**
 268  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 269  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 270  * @freq: Frequency in MHz
 271  * Returns: 0 on success, -1 on failure
 272  */
 273 int wpa_driver_wext_set_freq(void *priv, int freq)
 274 {
 275         struct wpa_driver_wext_data *drv = priv;
 276         struct iwreq iwr;
 277         int ret = 0;
 278
 279         os_memset(&iwr, 0, sizeof(iwr));
 280         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 281         iwr.u.freq.m = freq * 100000;
 282         iwr.u.freq.e = 1;
 283
 284         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 285                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWFREQ]");
 286                 ret = -1;
 287         }
 288
 289         return ret;
 290 }
 291
 292
 293 static void
 294 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 295 {
 296         union wpa_event_data data;
 297
 298         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 299                    custom);
 300
 301         os_memset(&data, 0, sizeof(data));
 302         /* Host AP driver */
 303         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 304                 data.michael_mic_failure.unicast =
 305                         os_strstr(custom, " unicast ") != NULL;
 306                 /* TODO: parse parameters(?) */
 307                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 308         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 309                 char *spos;
 310                 int bytes;
 311
 312                 spos = custom + 17;
 313
 314                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 315                 if (!bytes || (bytes & 1))
 316                         return;
 317                 bytes /= 2;
 318
 319                 data.assoc_info.req_ies = os_malloc(bytes);
 320                 if (data.assoc_info.req_ies == NULL)
 321                         return;
 322
 323                 data.assoc_info.req_ies_len = bytes;
 324                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 325
 326                 spos += bytes * 2;
 327
 328                 data.assoc_info.resp_ies = NULL;
 329                 data.assoc_info.resp_ies_len = 0;
 330
 331                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 332                         spos += 9;
 333
 334                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 335                         if (!bytes || (bytes & 1))
 336                                 goto done;
 337                         bytes /= 2;
 338
 339                         data.assoc_info.resp_ies = os_malloc(bytes);
 340                         if (data.assoc_info.resp_ies == NULL)
 341                                 goto done;
 342
 343                         data.assoc_info.resp_ies_len = bytes;
 344                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 345                 }
 346
 347                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 348
 349         done:
 350                 os_free(data.assoc_info.resp_ies);
 351                 os_free(data.assoc_info.req_ies);
 352 #ifdef CONFIG_PEERKEY
 353         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 354                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 355                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 356                                    "STKSTART.request '%s'", custom + 17);
 357                         return;
 358                 }
 359                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 360 #endif /* CONFIG_PEERKEY */
 361 #ifdef ANDROID
 362         } else if (os_strncmp(custom, "STOP", 4) == 0) {
 363                 wpa_msg(ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STOPPED");
 364         } else if (os_strncmp(custom, "START", 5) == 0) {
 365                 wpa_msg(ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STARTED");
 366         } else if (os_strncmp(custom, "HANG", 4) == 0) {
 367                 wpa_msg(ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "HANGED");
 368 #endif /* ANDROID */
 369         }
 370 }
 371
 372
 373 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 374         void *ctx, const char *ev, size_t len)
 375 {
 376         const struct iw_michaelmicfailure *mic;
 377         union wpa_event_data data;
 378
 379         if (len < sizeof(*mic))
 380                 return -1;
 381
 382         mic = (const struct iw_michaelmicfailure *) ev;
 383
 384         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 385                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 386                    MAC2STR(mic->src_addr.sa_data));
 387
 388         os_memset(&data, 0, sizeof(data));
 389         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 390         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 391
 392         return 0;
 393 }
 394
 395
 396 static int wpa_driver_wext_event_wireless_pmkidcand(
 397         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 398 {
 399         const struct iw_pmkid_cand *cand;
 400         union wpa_event_data data;
 401         const u8 *addr;
 402
 403         if (len < sizeof(*cand))
 404                 return -1;
 405
 406         cand = (const struct iw_pmkid_cand *) ev;
 407         addr = (const u8 *) cand->bssid.sa_data;
 408
 409         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 410                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 411                    cand->index, MAC2STR(addr));
 412
 413         os_memset(&data, 0, sizeof(data));
 414         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 415         data.pmkid_candidate.index = cand->index;
 416         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 417         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 418
 419         return 0;
 420 }
 421
 422
 423 static int wpa_driver_wext_event_wireless_assocreqie(
 424         struct wpa_driver_wext_data *drv, const char *ev, int len)
 425 {
 426         if (len < 0)
 427                 return -1;
 428
 429         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 430                     len);
 431         os_free(drv->assoc_req_ies);
 432         drv->assoc_req_ies = os_malloc(len);
 433         if (drv->assoc_req_ies == NULL) {
 434                 drv->assoc_req_ies_len = 0;
 435                 return -1;
 436         }
 437         os_memcpy(drv->assoc_req_ies, ev, len);
 438         drv->assoc_req_ies_len = len;
 439
 440         return 0;
 441 }
 442
 443
 444 static int wpa_driver_wext_event_wireless_assocrespie(
 445         struct wpa_driver_wext_data *drv, const char *ev, int len)
 446 {
 447         if (len < 0)
 448                 return -1;
 449
 450         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 451                     len);
 452         os_free(drv->assoc_resp_ies);
 453         drv->assoc_resp_ies = os_malloc(len);
 454         if (drv->assoc_resp_ies == NULL) {
 455                 drv->assoc_resp_ies_len = 0;
 456                 return -1;
 457         }
 458         os_memcpy(drv->assoc_resp_ies, ev, len);
 459         drv->assoc_resp_ies_len = len;
 460
 461         return 0;
 462 }
 463
 464
 465 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 466 {
 467         union wpa_event_data data;
 468
 469         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 470                 return;
 471
 472         os_memset(&data, 0, sizeof(data));
 473         if (drv->assoc_req_ies) {
 474                 data.assoc_info.req_ies = drv->assoc_req_ies;
 475                 drv->assoc_req_ies = NULL;
 476                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 477         }
 478         if (drv->assoc_resp_ies) {
 479                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 480                 drv->assoc_resp_ies = NULL;
 481                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 482         }
 483
 484         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 485
 486         os_free(data.assoc_info.req_ies);
 487         os_free(data.assoc_info.resp_ies);
 488 }
 489
 490
 491 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 492                                            void *ctx, char *data, int len)
 493 {
 494         struct iw_event iwe_buf, *iwe = &iwe_buf;
 495         char *pos, *end, *custom, *buf;
 496
 497         pos = data;
 498         end = data + len;
 499
 500         while (pos + IW_EV_LCP_LEN <= end) {
 501                 /* Event data may be unaligned, so make a local, aligned copy
 502                  * before processing. */
 503                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 504                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 505                            iwe->cmd, iwe->len);
 506                 if (iwe->len <= IW_EV_LCP_LEN)
 507                         return;
 508
 509                 custom = pos + IW_EV_POINT_LEN;
 510                 if (drv->we_version_compiled > 18 &&
 511                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 512                      iwe->cmd == IWEVCUSTOM ||
 513                      iwe->cmd == IWEVASSOCREQIE ||
 514                      iwe->cmd == IWEVASSOCRESPIE ||
 515                      iwe->cmd == IWEVPMKIDCAND)) {
 516                         /* WE-19 removed the pointer from struct iw_point */
 517                         char *dpos = (char *) &iwe_buf.u.data.length;
 518                         int dlen = dpos - (char *) &iwe_buf;
 519                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 520                                   sizeof(struct iw_event) - dlen);
 521                 } else {
 522                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 523                         custom += IW_EV_POINT_OFF;
 524                 }
 525
 526                 switch (iwe->cmd) {
 527                 case SIOCGIWAP:
 528                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 529                                    MACSTR,
 530                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 531                         if (is_zero_ether_addr(
 532                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 533                             os_memcmp(iwe->u.ap_addr.sa_data,
 534                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 535                             0) {
 536                                 os_free(drv->assoc_req_ies);
 537                                 drv->assoc_req_ies = NULL;
 538                                 os_free(drv->assoc_resp_ies);
 539                                 drv->assoc_resp_ies = NULL;
 540 #ifdef ANDROID
 541                                 if (!drv->skip_disconnect) {
 542                                         drv->skip_disconnect = 1;
 543 #endif
 544                                         wpa_supplicant_event(ctx, EVENT_DISASSOC,
 545                                                      NULL);
 546 #ifdef ANDROID
 547                                         wpa_driver_wext_disconnect(drv);
 548                                 }
 549 #endif
 550
 551                         } else {
 552 #ifdef ANDROID
 553                                 drv->skip_disconnect = 0;
 554 #endif
 555                                 wpa_driver_wext_event_assoc_ies(drv);
 556                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 557                         }
 558                         break;
 559                 case IWEVMICHAELMICFAILURE:
 560                         if (custom + iwe->u.data.length > end) {
 561                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 562                                            "IWEVMICHAELMICFAILURE length");
 563                                 return;
 564                         }
 565                         wpa_driver_wext_event_wireless_michaelmicfailure(
 566                                 ctx, custom, iwe->u.data.length);
 567                         break;
 568                 case IWEVCUSTOM:
 569                         if (custom + iwe->u.data.length > end) {
 570                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 571                                            "IWEVCUSTOM length");
 572                                 return;
 573                         }
 574                         buf = os_malloc(iwe->u.data.length + 1);
 575                         if (buf == NULL)
 576                                 return;
 577                         os_memcpy(buf, custom, iwe->u.data.length);
 578                         buf[iwe->u.data.length] = '\0';
 579                         wpa_driver_wext_event_wireless_custom(ctx, buf);
 580                         os_free(buf);
 581                         break;
 582                 case SIOCGIWSCAN:
 583                         drv->scan_complete_events = 1;
 584                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 585                                              drv, ctx);
 586                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 587                         break;
 588                 case IWEVASSOCREQIE:
 589                         if (custom + iwe->u.data.length > end) {
 590                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 591                                            "IWEVASSOCREQIE length");
 592                                 return;
 593                         }
 594                         wpa_driver_wext_event_wireless_assocreqie(
 595                                 drv, custom, iwe->u.data.length);
 596                         break;
 597                 case IWEVASSOCRESPIE:
 598                         if (custom + iwe->u.data.length > end) {
 599                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 600                                            "IWEVASSOCRESPIE length");
 601                                 return;
 602                         }
 603                         wpa_driver_wext_event_wireless_assocrespie(
 604                                 drv, custom, iwe->u.data.length);
 605                         break;
 606                 case IWEVPMKIDCAND:
 607                         if (custom + iwe->u.data.length > end) {
 608                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 609                                            "IWEVPMKIDCAND length");
 610                                 return;
 611                         }
 612                         wpa_driver_wext_event_wireless_pmkidcand(
 613                                 drv, custom, iwe->u.data.length);
 614                         break;
 615                 }
 616
 617                 pos += iwe->len;
 618         }
 619 }
 620
 621
 622 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 623                                        void *ctx, char *buf, size_t len,
 624                                        int del)
 625 {
 626         union wpa_event_data event;
 627
 628         os_memset(&event, 0, sizeof(event));
 629         if (len > sizeof(event.interface_status.ifname))
 630                 len = sizeof(event.interface_status.ifname) - 1;
 631         os_memcpy(event.interface_status.ifname, buf, len);
 632         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 633                 EVENT_INTERFACE_ADDED;
 634
 635         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 636                    del ? "DEL" : "NEW",
 637                    event.interface_status.ifname,
 638                    del ? "removed" : "added");
 639
 640         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 641                 if (del)
 642                         drv->if_removed = 1;
 643                 else
 644                         drv->if_removed = 0;
 645         }
 646
 647         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 648 }
 649
 650
 651 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 652                                       struct nlmsghdr *h)
 653 {
 654         struct ifinfomsg *ifi;
 655         int attrlen, nlmsg_len, rta_len;
 656         struct rtattr *attr;
 657
 658         ifi = NLMSG_DATA(h);
 659
 660         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 661
 662         attrlen = h->nlmsg_len - nlmsg_len;
 663         if (attrlen < 0)
 664                 return 0;
 665
 666         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 667
 668         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 669         while (RTA_OK(attr, attrlen)) {
 670                 if (attr->rta_type == IFLA_IFNAME) {
 671                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 672                             == 0)
 673                                 return 1;
 674                         else
 675                                 break;
 676                 }
 677                 attr = RTA_NEXT(attr, attrlen);
 678         }
 679
 680         return 0;
 681 }
 682
 683
 684 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 685                                        int ifindex, struct nlmsghdr *h)
 686 {
 687         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 688                 return 1;
 689
 690         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, h)) {
 691                 drv->ifindex = if_nametoindex(drv->ifname);
 692                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 693                            "interface");
 694                 wpa_driver_wext_finish_drv_init(drv);
 695                 return 1;
 696         }
 697
 698         return 0;
 699 }
 700
 701
 702 static void wpa_driver_wext_event_rtm_newlink(struct wpa_driver_wext_data *drv,
 703                                               void *ctx, struct nlmsghdr *h,
 704                                               size_t len)
 705 {
 706         struct ifinfomsg *ifi;
 707         int attrlen, nlmsg_len, rta_len;
 708         struct rtattr * attr;
 709
 710         if (len < sizeof(*ifi))
 711                 return;
 712
 713         ifi = NLMSG_DATA(h);
 714
 715         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, h)) {
 716                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 717                            ifi->ifi_index);
 718                 return;
 719         }
 720
 721         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 722                    "(%s%s%s%s)",
 723                    drv->operstate, ifi->ifi_flags,
 724                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 725                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 726                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 727                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 728         /*
 729          * Some drivers send the association event before the operup event--in
 730          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 731          * fails. This will hit us when wpa_supplicant does not need to do
 732          * IEEE 802.1X authentication
 733          */
 734         if (drv->operstate == 1 &&
 735             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 736             !(ifi->ifi_flags & IFF_RUNNING))
 737                 wpa_driver_wext_send_oper_ifla(drv, -1, IF_OPER_UP);
 738
 739         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 740
 741         attrlen = h->nlmsg_len - nlmsg_len;
 742         if (attrlen < 0)
 743                 return;
 744
 745         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 746
 747         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 748         while (RTA_OK(attr, attrlen)) {
 749                 if (attr->rta_type == IFLA_WIRELESS) {
 750                         wpa_driver_wext_event_wireless(
 751                                 drv, ctx, ((char *) attr) + rta_len,
 752                                 attr->rta_len - rta_len);
 753                 } else if (attr->rta_type == IFLA_IFNAME) {
 754                         wpa_driver_wext_event_link(drv, ctx,
 755                                                    ((char *) attr) + rta_len,
 756                                                    attr->rta_len - rta_len, 0);
 757                 }
 758                 attr = RTA_NEXT(attr, attrlen);
 759         }
 760 }
 761
 762
 763 static void wpa_driver_wext_event_rtm_dellink(struct wpa_driver_wext_data *drv,
 764                                               void *ctx, struct nlmsghdr *h,
 765                                               size_t len)
 766 {
 767         struct ifinfomsg *ifi;
 768         int attrlen, nlmsg_len, rta_len;
 769         struct rtattr * attr;
 770
 771         if (len < sizeof(*ifi))
 772                 return;
 773
 774         ifi = NLMSG_DATA(h);
 775
 776         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 777
 778         attrlen = h->nlmsg_len - nlmsg_len;
 779         if (attrlen < 0)
 780                 return;
 781
 782         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 783
 784         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 785         while (RTA_OK(attr, attrlen)) {
 786                 if (attr->rta_type == IFLA_IFNAME) {
 787                         wpa_driver_wext_event_link(drv,  ctx,
 788                                                    ((char *) attr) + rta_len,
 789                                                    attr->rta_len - rta_len, 1);
 790                 }
 791                 attr = RTA_NEXT(attr, attrlen);
 792         }
 793 }
 794
 795
 796 static void wpa_driver_wext_event_receive(int sock, void *eloop_ctx,
 797                                           void *sock_ctx)
 798 {
 799         char buf[8192];
 800         int left;
 801         struct sockaddr_nl from;
 802         socklen_t fromlen;
 803         struct nlmsghdr *h;
 804         int max_events = 10;
 805
 806 try_again:
 807         fromlen = sizeof(from);
 808         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 809                         (struct sockaddr *) &from, &fromlen);
 810         if (left < 0) {
 811                 if (errno != EINTR && errno != EAGAIN)
 812                         wpa_printf(MSG_ERROR, "%s: recvfrom(netlink): %d", __func__, errno);
 813                 return;
 814         }
 815
 816         h = (struct nlmsghdr *) buf;
 817         while (left >= (int) sizeof(*h)) {
 818                 int len, plen;
 819
 820                 len = h->nlmsg_len;
 821                 plen = len - sizeof(*h);
 822                 if (len > left || plen < 0) {
 823                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 824                                    "len=%d left=%d plen=%d",
 825                                    len, left, plen);
 826                         break;
 827                 }
 828
 829                 switch (h->nlmsg_type) {
 830                 case RTM_NEWLINK:
 831                         wpa_driver_wext_event_rtm_newlink(eloop_ctx, sock_ctx,
 832                                                           h, plen);
 833                         break;
 834                 case RTM_DELLINK:
 835                         wpa_driver_wext_event_rtm_dellink(eloop_ctx, sock_ctx,
 836                                                           h, plen);
 837                         break;
 838                 }
 839
 840                 len = NLMSG_ALIGN(len);
 841                 left -= len;
 842                 h = (struct nlmsghdr *) ((char *) h + len);
 843         }
 844
 845         if (left > 0) {
 846                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 847                            "message", left);
 848         }
 849
 850         if (--max_events > 0) {
 851                 /*
 852                  * Try to receive all events in one eloop call in order to
 853                  * limit race condition on cases where AssocInfo event, Assoc
 854                  * event, and EAPOL frames are received more or less at the
 855                  * same time. We want to process the event messages first
 856                  * before starting EAPOL processing.
 857                  */
 858                 goto try_again;
 859         }
 860 }
 861
 862
 863 static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
 864                                               const char *ifname, int *flags)
 865 {
 866         struct ifreq ifr;
 867
 868         os_memset(&ifr, 0, sizeof(ifr));
 869         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 870         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 871                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIFFLAGS]");
 872                 return -1;
 873         }
 874         *flags = ifr.ifr_flags & 0xffff;
 875         return 0;
 876 }
 877
 878
 879 /**
 880  * wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 881  * @drv: driver_wext private data
 882  * @flags: Pointer to returned flags value
 883  * Returns: 0 on success, -1 on failure
 884  */
 885 int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
 886 {
 887         return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
 888 }
 889
 890
 891 static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
 892                                               const char *ifname, int flags)
 893 {
 894         struct ifreq ifr;
 895
 896         os_memset(&ifr, 0, sizeof(ifr));
 897         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 898         ifr.ifr_flags = flags & 0xffff;
 899         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 900                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIFFLAGS]");
 901                 return -1;
 902         }
 903         return 0;
 904 }
 905
 906
 907 /**
 908  * wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 909  * @drv: driver_wext private data
 910  * @flags: New value for flags
 911  * Returns: 0 on success, -1 on failure
 912  */
 913 int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
 914 {
 915         return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
 916 }
 917
 918
 919 /**
 920  * wpa_driver_wext_init - Initialize WE driver interface
 921  * @ctx: context to be used when calling wpa_supplicant functions,
 922  * e.g., wpa_supplicant_event()
 923  * @ifname: interface name, e.g., wlan0
 924  * Returns: Pointer to private data, %NULL on failure
 925  */
 926 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 927 {
 928         int s;
 929         struct sockaddr_nl local;
 930         struct wpa_driver_wext_data *drv;
 931
 932         drv = os_zalloc(sizeof(*drv));
 933         if (drv == NULL)
 934                 return NULL;
 935         drv->ctx = ctx;
 936         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 937
 938         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 939         if (drv->ioctl_sock < 0) {
 940                 wpa_printf(MSG_ERROR, "%s: socket(PF_INET,SOCK_DGRAM)", __func__);
 941                 os_free(drv);
 942                 return NULL;
 943         }
 944
 945         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 946         if (s < 0) {
 947                 wpa_printf(MSG_ERROR, "%s: socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)", __func__);
 948                 close(drv->ioctl_sock);
 949                 os_free(drv);
 950                 return NULL;
 951         }
 952
 953         os_memset(&local, 0, sizeof(local));
 954         local.nl_family = AF_NETLINK;
 955         local.nl_groups = RTMGRP_LINK;
 956         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
 957                 wpa_printf(MSG_ERROR, "bind(netlink)");
 958                 close(s);
 959                 close(drv->ioctl_sock);
 960                 os_free(drv);
 961                 return NULL;
 962         }
 963
 964         eloop_register_read_sock(s, wpa_driver_wext_event_receive, drv, ctx);
 965         drv->event_sock = s;
 966
 967         drv->mlme_sock = -1;
 968 #ifdef ANDROID
 969         drv->errors = 0;
 970         drv->driver_is_started = TRUE;
 971         drv->skip_disconnect = 0;
 972 #endif
 973         wpa_driver_wext_finish_drv_init(drv);
 974
 975         return drv;
 976 }
 977
 978
 979 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
 980 {
 981         int flags;
 982
 983         if (wpa_driver_wext_get_ifflags(drv, &flags) != 0)
 984                 printf("Could not get interface '%s' flags\n", drv->ifname);
 985         else if (!(flags & IFF_UP)) {
 986                 if (wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
 987                         printf("Could not set interface '%s' UP\n",
 988                                drv->ifname);
 989                 } else {
 990                         /*
 991                          * Wait some time to allow driver to initialize before
 992                          * starting configuring the driver. This seems to be
 993                          * needed at least some drivers that load firmware etc.
 994                          * when the interface is set up.
 995                          */
 996                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
 997                                    "a second for the driver to complete "
 998                                    "initialization", drv->ifname);
 999                         sleep(1);
1000                 }
1001         }
1002
1003         /*
1004          * Make sure that the driver does not have any obsolete PMKID entries.
1005          */
1006         wpa_driver_wext_flush_pmkid(drv);
1007
1008         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
1009                 printf("Could not configure driver to use managed mode\n");
1010         }
1011
1012         wpa_driver_wext_get_range(drv);
1013
1014         /*
1015          * Unlock the driver's BSSID and force to a random SSID to clear any
1016          * previous association the driver might have when the supplicant
1017          * starts up.
1018          */
1019         wpa_driver_wext_disconnect(drv);
1020
1021         drv->ifindex = if_nametoindex(drv->ifname);
1022
1023         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
1024                 /*
1025                  * Host AP driver may use both wlan# and wifi# interface in
1026                  * wireless events. Since some of the versions included WE-18
1027                  * support, let's add the alternative ifindex also from
1028                  * driver_wext.c for the time being. This may be removed at
1029                  * some point once it is believed that old versions of the
1030                  * driver are not in use anymore.
1031                  */
1032                 char ifname2[IFNAMSIZ + 1];
1033                 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
1034                 os_memcpy(ifname2, "wifi", 4);
1035                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
1036         }
1037
1038         wpa_driver_wext_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1039 }
1040
1041
1042 /**
1043  * wpa_driver_wext_deinit - Deinitialize WE driver interface
1044  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1045  *
1046  * Shut down driver interface and processing of driver events. Free
1047  * private data buffer if one was allocated in wpa_driver_wext_init().
1048  */
1049 void wpa_driver_wext_deinit(void *priv)
1050 {
1051         struct wpa_driver_wext_data *drv = priv;
1052         int flags;
1053
1054         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1055
1056         /*
1057          * Clear possibly configured driver parameters in order to make it
1058          * easier to use the driver after wpa_supplicant has been terminated.
1059          */
1060         wpa_driver_wext_disconnect(drv);
1061
1062         wpa_driver_wext_send_oper_ifla(priv, 0, IF_OPER_UP);
1063
1064         eloop_unregister_read_sock(drv->event_sock);
1065         if (drv->mlme_sock >= 0)
1066                 eloop_unregister_read_sock(drv->mlme_sock);
1067
1068         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
1069                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
1070
1071         close(drv->event_sock);
1072         close(drv->ioctl_sock);
1073         if (drv->mlme_sock >= 0)
1074                 close(drv->mlme_sock);
1075         os_free(drv->assoc_req_ies);
1076         os_free(drv->assoc_resp_ies);
1077         os_free(drv);
1078 }
1079
1080 /**
1081  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1082  * @eloop_ctx: Unused
1083  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1084  *
1085  * This function can be used as registered timeout when starting a scan to
1086  * generate a scan completed event if the driver does not report this.
1087  */
1088 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1089 {
1090         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1091         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1092 }
1093
1094 /**
1095  * wpa_driver_wext_set_scan_timeout - Set scan timeout to report scan completion
1096  * @priv:  Pointer to private wext data from wpa_driver_wext_init()
1097  *
1098  * This function can be used to set registered timeout when starting a scan to
1099  * generate a scan completed event if the driver does not report this.
1100  */
1101 static void wpa_driver_wext_set_scan_timeout(void *priv)
1102 {
1103         struct wpa_driver_wext_data *drv = priv;
1104         int timeout = 10; /* In case scan A and B bands it can be long */
1105
1106         /* Not all drivers generate "scan completed" wireless event, so try to
1107          * read results after a timeout. */
1108         if (drv->scan_complete_events) {
1109                 /*
1110                  * The driver seems to deliver SIOCGIWSCAN events to notify
1111                  * when scan is complete, so use longer timeout to avoid race
1112                  * conditions with scanning and following association request.
1113                  */
1114                 timeout = 30;
1115         }
1116         wpa_printf(MSG_DEBUG, "Scan requested - scan timeout %d seconds",
1117                    timeout);
1118         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1119         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1120                                drv->ctx);
1121 }
1122
1123 /**
1124  * wpa_driver_wext_scan - Request the driver to initiate scan
1125  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1126  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1127  *      all SSIDs (either active scan with broadcast SSID or passive
1128  *      scan
1129  * @ssid_len: Length of the SSID
1130  * Returns: 0 on success, -1 on failure
1131  */
1132 int wpa_driver_wext_scan(void *priv, const u8 *ssid, size_t ssid_len)
1133 {
1134         struct wpa_driver_wext_data *drv = priv;
1135         struct iwreq iwr;
1136         int ret = 0;
1137         struct iw_scan_req req;
1138 #ifdef ANDROID
1139         struct wpa_supplicant *wpa_s = (struct wpa_supplicant *)(drv->ctx);
1140         int scan_probe_flag = 0;
1141 #endif
1142
1143         wpa_printf(MSG_ERROR, "%s: Start", __func__);
1144
1145         if (ssid_len > IW_ESSID_MAX_SIZE) {
1146                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1147                            __FUNCTION__, (unsigned long) ssid_len);
1148                 return -1;
1149         }
1150
1151         os_memset(&iwr, 0, sizeof(iwr));
1152         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1153
1154 #ifdef ANDROID
1155         if (wpa_s->prev_scan_ssid != BROADCAST_SSID_SCAN) {
1156                 scan_probe_flag = wpa_s->prev_scan_ssid->scan_ssid;
1157         }
1158         wpa_printf(MSG_DEBUG, "%s: specific scan = %d", __func__,
1159                 (scan_probe_flag && (ssid && ssid_len)) ? 1 : 0);
1160         if (scan_probe_flag && (ssid && ssid_len)) {
1161 #else
1162         if (ssid && ssid_len) {
1163 #endif
1164                 os_memset(&req, 0, sizeof(req));
1165                 req.essid_len = ssid_len;
1166                 req.bssid.sa_family = ARPHRD_ETHER;
1167                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1168                 os_memcpy(req.essid, ssid, ssid_len);
1169                 iwr.u.data.pointer = (caddr_t) &req;
1170                 iwr.u.data.length = sizeof(req);
1171                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1172         }
1173
1174         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1175                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWSCAN]");
1176                 ret = -1;
1177         }
1178
1179         wpa_driver_wext_set_scan_timeout(priv);
1180
1181         return ret;
1182 }
1183
1184 /**
1185  * wpa_driver_wext_combo_scan - Request the driver to initiate combo scan
1186  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1187  * @ssid_ptr: Pointer to current SSID from configuration list or %NULL to
1188  *      scan for all SSIDs (either active scan with broadcast SSID or passive
1189  *      scan)
1190  * @ssid_conf: SSID list from the configuration
1191  * Returns: 0 on success, -1 on failure
1192  *      Also updates @ssid_ptr to next specific scan item
1193  */
1194 int wpa_driver_wext_combo_scan(void *priv, struct wpa_ssid **ssid_ptr,
1195                                struct wpa_ssid *ssid_conf)
1196 {
1197         char buf[WEXT_CSCAN_BUF_LEN];
1198         struct wpa_driver_wext_data *drv = priv;
1199         struct iwreq iwr;
1200         int ret = 0, timeout, i = 0, bp;
1201         struct wpa_ssid *ssid, *ssid_orig;
1202         u8 *ssid_nm = NULL;
1203         size_t ssid_len = 0;
1204
1205         struct wpa_supplicant *wpa_s = (struct wpa_supplicant *)(drv->ctx);
1206         int scan_probe_flag = 0;
1207
1208         if (!drv->driver_is_started) {
1209                 wpa_printf(MSG_ERROR, "%s: Driver stopped", __func__);
1210                 return -1;
1211         }
1212
1213         wpa_printf(MSG_ERROR, "%s: Start", __func__);
1214
1215         /* Set list of SSIDs */
1216         ssid_orig = (*ssid_ptr);
1217         ssid = (*ssid_ptr) ? (*ssid_ptr) : ssid_conf;
1218         bp = WEXT_CSCAN_HEADER_SIZE;
1219         os_memcpy(buf, WEXT_CSCAN_HEADER, bp);
1220         while (i < WEXT_CSCAN_AMOUNT) {
1221                 if ((bp + IW_ESSID_MAX_SIZE + 10) >= (int)sizeof(buf))
1222                         break;
1223                 *ssid_ptr = ssid;
1224                 if (ssid == NULL)
1225                         break;
1226                 if (!ssid->disabled && ssid->scan_ssid) {
1227                         wpa_printf(MSG_DEBUG, "For Scan: %s", ssid->ssid);
1228                         buf[bp++] = WEXT_CSCAN_SSID_SECTION;
1229                         buf[bp++] = ssid->ssid_len;
1230                         os_memcpy(&buf[bp], ssid->ssid, ssid->ssid_len);
1231                         bp += ssid->ssid_len;
1232                         i++;
1233                 }
1234                 ssid = ssid->next;
1235         }
1236
1237         /* Set list of channels */
1238         buf[bp++] = WEXT_CSCAN_CHANNEL_SECTION;
1239         buf[bp++] = 0;
1240
1241         /* Set passive dwell time (default is 250) */
1242         buf[bp++] = WEXT_CSCAN_PASV_DWELL_SECTION;
1243         buf[bp++] = (u8)WEXT_CSCAN_PASV_DWELL_TIME;
1244         buf[bp++] = (u8)(WEXT_CSCAN_PASV_DWELL_TIME >> 8);
1245
1246         /* Set home dwell time (default is 40) */
1247         buf[bp++] = WEXT_CSCAN_HOME_DWELL_SECTION;
1248         buf[bp++] = (u8)WEXT_CSCAN_HOME_DWELL_TIME;
1249         buf[bp++] = (u8)(WEXT_CSCAN_HOME_DWELL_TIME >> 8);
1250
1251         os_memset(&iwr, 0, sizeof(iwr));
1252         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1253         iwr.u.data.pointer = buf;
1254         iwr.u.data.length = bp;
1255
1256         if ((ret = ioctl(drv->ioctl_sock, SIOCSIWPRIV, &iwr)) < 0) {
1257                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWPRIV] (cscan): %d", ret);
1258                 *ssid_ptr = ssid_orig;
1259                 /* goto old_scan; */
1260         }
1261
1262         wpa_driver_wext_set_scan_timeout(priv);
1263
1264         return ret;
1265
1266 old_scan:
1267         if (*ssid_ptr) {
1268                 ssid_nm = (*ssid_ptr)->ssid;
1269                 ssid_len = (*ssid_ptr)->ssid_len;
1270         }
1271
1272         return wpa_driver_wext_scan(priv, ssid_nm, ssid_len);
1273 }
1274
1275
1276 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1277                                     size_t *len)
1278 {
1279         struct iwreq iwr;
1280         u8 *res_buf;
1281         size_t res_buf_len;
1282
1283         res_buf_len = IW_SCAN_MAX_DATA;
1284         for (;;) {
1285                 res_buf = os_malloc(res_buf_len);
1286                 if (res_buf == NULL)
1287                         return NULL;
1288                 os_memset(&iwr, 0, sizeof(iwr));
1289                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1290                 iwr.u.data.pointer = res_buf;
1291                 iwr.u.data.length = res_buf_len;
1292
1293                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1294                         break;
1295
1296                 if (errno == E2BIG && res_buf_len < 65535) {
1297                         os_free(res_buf);
1298                         res_buf = NULL;
1299                         res_buf_len *= 2;
1300                         if (res_buf_len > 65535)
1301                                 res_buf_len = 65535; /* 16-bit length field */
1302                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1303                                    "trying larger buffer (%lu bytes)",
1304                                    (unsigned long) res_buf_len);
1305                 } else {
1306                         wpa_printf(MSG_ERROR, "ioctl[SIOCGIWSCAN]: %d", errno);
1307                         os_free(res_buf);
1308                         return NULL;
1309                 }
1310         }
1311
1312         if (iwr.u.data.length > res_buf_len) {
1313                 os_free(res_buf);
1314                 return NULL;
1315         }
1316         *len = iwr.u.data.length;
1317
1318         return res_buf;
1319 }
1320
1321
1322 /*
1323  * Data structure for collecting WEXT scan results. This is needed to allow
1324  * the various methods of reporting IEs to be combined into a single IE buffer.
1325  */
1326 struct wext_scan_data {
1327         struct wpa_scan_res res;
1328         u8 *ie;
1329         size_t ie_len;
1330         u8 ssid[32];
1331         size_t ssid_len;
1332         int maxrate;
1333 };
1334
1335
1336 static void wext_get_scan_mode(struct iw_event *iwe,
1337                                struct wext_scan_data *res)
1338 {
1339         if (iwe->u.mode == IW_MODE_ADHOC)
1340                 res->res.caps |= IEEE80211_CAP_IBSS;
1341         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1342                 res->res.caps |= IEEE80211_CAP_ESS;
1343 }
1344
1345
1346 static void wext_get_scan_ssid(struct iw_event *iwe,
1347                                struct wext_scan_data *res, char *custom,
1348                                char *end)
1349 {
1350         int ssid_len = iwe->u.essid.length;
1351         if (custom + ssid_len > end)
1352                 return;
1353         if (iwe->u.essid.flags &&
1354             ssid_len > 0 &&
1355             ssid_len <= IW_ESSID_MAX_SIZE) {
1356                 os_memcpy(res->ssid, custom, ssid_len);
1357                 res->ssid_len = ssid_len;
1358         }
1359 }
1360
1361
1362 static void wext_get_scan_freq(struct iw_event *iwe,
1363                                struct wext_scan_data *res)
1364 {
1365         int divi = 1000000, i;
1366
1367         if (iwe->u.freq.e == 0) {
1368                 /*
1369                  * Some drivers do not report frequency, but a channel.
1370                  * Try to map this to frequency by assuming they are using
1371                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1372                  * frequency if the driver sends both frequency and channel,
1373                  * since the driver may be sending an A-band channel that we
1374                  * don't handle here.
1375                  */
1376
1377                 if (res->res.freq)
1378                         return;
1379
1380                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1381                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1382                         return;
1383                 } else if (iwe->u.freq.m == 14) {
1384                         res->res.freq = 2484;
1385                         return;
1386                 }
1387         }
1388
1389         if (iwe->u.freq.e > 6) {
1390                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1391                            MACSTR " m=%d e=%d)",
1392                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1393                            iwe->u.freq.e);
1394                 return;
1395         }
1396
1397         for (i = 0; i < iwe->u.freq.e; i++)
1398                 divi /= 10;
1399         res->res.freq = iwe->u.freq.m / divi;
1400 }
1401
1402
1403 static void wext_get_scan_qual(struct iw_event *iwe,
1404                                struct wext_scan_data *res)
1405 {
1406         res->res.qual = iwe->u.qual.qual;
1407         res->res.noise = iwe->u.qual.noise;
1408         res->res.level = iwe->u.qual.level;
1409 }
1410
1411
1412 static void wext_get_scan_encode(struct iw_event *iwe,
1413                                  struct wext_scan_data *res)
1414 {
1415         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1416                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1417 }
1418
1419
1420 static void wext_get_scan_rate(struct iw_event *iwe,
1421                                struct wext_scan_data *res, char *pos,
1422                                char *end)
1423 {
1424         int maxrate;
1425         char *custom = pos + IW_EV_LCP_LEN;
1426         struct iw_param p;
1427         size_t clen;
1428
1429         clen = iwe->len;
1430         if (custom + clen > end)
1431                 return;
1432         maxrate = 0;
1433         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1434                 /* Note: may be misaligned, make a local, aligned copy */
1435                 os_memcpy(&p, custom, sizeof(struct iw_param));
1436                 if (p.value > maxrate)
1437                         maxrate = p.value;
1438                 clen -= sizeof(struct iw_param);
1439                 custom += sizeof(struct iw_param);
1440         }
1441
1442         /* Convert the maxrate from WE-style (b/s units) to
1443          * 802.11 rates (500000 b/s units).
1444          */
1445         res->maxrate = maxrate / 500000;
1446 }
1447
1448
1449 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1450                                     struct wext_scan_data *res, char *custom,
1451                                     char *end)
1452 {
1453         char *genie, *gpos, *gend;
1454         u8 *tmp;
1455
1456         if (iwe->u.data.length == 0)
1457                 return;
1458
1459         gpos = genie = custom;
1460         gend = genie + iwe->u.data.length;
1461         if (gend > end) {
1462                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1463                 return;
1464         }
1465
1466         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1467         if (tmp == NULL)
1468                 return;
1469         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1470         res->ie = tmp;
1471         res->ie_len += gend - gpos;
1472 }
1473
1474
1475 static void wext_get_scan_custom(struct iw_event *iwe,
1476                                  struct wext_scan_data *res, char *custom,
1477                                  char *end)
1478 {
1479         size_t clen;
1480         u8 *tmp;
1481
1482         clen = iwe->u.data.length;
1483         if (custom + clen > end)
1484                 return;
1485
1486         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1487                 char *spos;
1488                 int bytes;
1489                 spos = custom + 7;
1490                 bytes = custom + clen - spos;
1491                 if (bytes & 1 || bytes == 0)
1492                         return;
1493                 bytes /= 2;
1494                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1495                 if (tmp == NULL)
1496                         return;
1497                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1498                 res->ie = tmp;
1499                 res->ie_len += bytes;
1500         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1501                 char *spos;
1502                 int bytes;
1503                 spos = custom + 7;
1504                 bytes = custom + clen - spos;
1505                 if (bytes & 1 || bytes == 0)
1506                         return;
1507                 bytes /= 2;
1508                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1509                 if (tmp == NULL)
1510                         return;
1511                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1512                 res->ie = tmp;
1513                 res->ie_len += bytes;
1514         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1515                 char *spos;
1516                 int bytes;
1517                 u8 bin[8];
1518                 spos = custom + 4;
1519                 bytes = custom + clen - spos;
1520                 if (bytes != 16) {
1521                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1522                         return;
1523                 }
1524                 bytes /= 2;
1525                 hexstr2bin(spos, bin, bytes);
1526                 res->res.tsf += WPA_GET_BE64(bin);
1527         }
1528 }
1529
1530
1531 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1532 {
1533         return drv->we_version_compiled > 18 &&
1534                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1535                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1536 }
1537
1538
1539 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1540                                            struct wext_scan_data *data)
1541 {
1542         struct wpa_scan_res **tmp;
1543         struct wpa_scan_res *r;
1544         size_t extra_len;
1545         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1546
1547         /* Figure out whether we need to fake any IEs */
1548         pos = data->ie;
1549         end = pos + data->ie_len;
1550         while (pos && pos + 1 < end) {
1551                 if (pos + 2 + pos[1] > end)
1552                         break;
1553                 if (pos[0] == WLAN_EID_SSID)
1554                         ssid_ie = pos;
1555                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1556                         rate_ie = pos;
1557                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1558                         rate_ie = pos;
1559                 pos += 2 + pos[1];
1560         }
1561
1562         extra_len = 0;
1563         if (ssid_ie == NULL)
1564                 extra_len += 2 + data->ssid_len;
1565         if (rate_ie == NULL && data->maxrate)
1566                 extra_len += 3;
1567
1568         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1569         if (r == NULL)
1570                 return;
1571         os_memcpy(r, &data->res, sizeof(*r));
1572         r->ie_len = extra_len + data->ie_len;
1573         pos = (u8 *) (r + 1);
1574         if (ssid_ie == NULL) {
1575                 /*
1576                  * Generate a fake SSID IE since the driver did not report
1577                  * a full IE list.
1578                  */
1579                 *pos++ = WLAN_EID_SSID;
1580                 *pos++ = data->ssid_len;
1581                 os_memcpy(pos, data->ssid, data->ssid_len);
1582                 pos += data->ssid_len;
1583         }
1584         if (rate_ie == NULL && data->maxrate) {
1585                 /*
1586                  * Generate a fake Supported Rates IE since the driver did not
1587                  * report a full IE list.
1588                  */
1589                 *pos++ = WLAN_EID_SUPP_RATES;
1590                 *pos++ = 1;
1591                 *pos++ = data->maxrate;
1592         }
1593         if (data->ie)
1594                 os_memcpy(pos, data->ie, data->ie_len);
1595
1596         tmp = os_realloc(res->res,
1597                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1598         if (tmp == NULL) {
1599                 os_free(r);
1600                 return;
1601         }
1602         tmp[res->num++] = r;
1603         res->res = tmp;
1604 }
1605
1606
1607 /**
1608  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1609  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1610  * Returns: Scan results on success, -1 on failure
1611  */
1612 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1613 {
1614         struct wpa_driver_wext_data *drv = priv;
1615         size_t ap_num = 0, len;
1616         int first;
1617         u8 *res_buf;
1618         struct iw_event iwe_buf, *iwe = &iwe_buf;
1619         char *pos, *end, *custom;
1620         struct wpa_scan_results *res;
1621         struct wext_scan_data data;
1622
1623 #ifdef ANDROID
1624         /* To make sure correctly parse scan results which is impacted by wext
1625          * version, first check range->we_version, if it is default value (0),
1626          * update again here */
1627         if (drv->we_version_compiled == 0)
1628                 wpa_driver_wext_get_range(drv);
1629 #endif
1630
1631         res_buf = wpa_driver_wext_giwscan(drv, &len);
1632         if (res_buf == NULL)
1633                 return NULL;
1634
1635         ap_num = 0;
1636         first = 1;
1637
1638         res = os_zalloc(sizeof(*res));
1639         if (res == NULL) {
1640                 os_free(res_buf);
1641                 return NULL;
1642         }
1643
1644         pos = (char *) res_buf;
1645         end = (char *) res_buf + len;
1646         os_memset(&data, 0, sizeof(data));
1647
1648         while (pos + IW_EV_LCP_LEN <= end) {
1649                 /* Event data may be unaligned, so make a local, aligned copy
1650                  * before processing. */
1651                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1652                 if (iwe->len <= IW_EV_LCP_LEN)
1653                         break;
1654
1655                 custom = pos + IW_EV_POINT_LEN;
1656                 if (wext_19_iw_point(drv, iwe->cmd)) {
1657                         /* WE-19 removed the pointer from struct iw_point */
1658                         char *dpos = (char *) &iwe_buf.u.data.length;
1659                         int dlen = dpos - (char *) &iwe_buf;
1660                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1661                                   sizeof(struct iw_event) - dlen);
1662                 } else {
1663                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1664                         custom += IW_EV_POINT_OFF;
1665                 }
1666
1667                 switch (iwe->cmd) {
1668                 case SIOCGIWAP:
1669                         if (!first)
1670                                 wpa_driver_wext_add_scan_entry(res, &data);
1671                         first = 0;
1672                         os_free(data.ie);
1673                         os_memset(&data, 0, sizeof(data));
1674                         os_memcpy(data.res.bssid,
1675                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1676                         break;
1677                 case SIOCGIWMODE:
1678                         wext_get_scan_mode(iwe, &data);
1679                         break;
1680                 case SIOCGIWESSID:
1681                         wext_get_scan_ssid(iwe, &data, custom, end);
1682                         break;
1683                 case SIOCGIWFREQ:
1684                         wext_get_scan_freq(iwe, &data);
1685                         break;
1686                 case IWEVQUAL:
1687                         wext_get_scan_qual(iwe, &data);
1688                         break;
1689                 case SIOCGIWENCODE:
1690                         wext_get_scan_encode(iwe, &data);
1691                         break;
1692                 case SIOCGIWRATE:
1693                         wext_get_scan_rate(iwe, &data, pos, end);
1694                         break;
1695                 case IWEVGENIE:
1696                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1697                         break;
1698                 case IWEVCUSTOM:
1699                         wext_get_scan_custom(iwe, &data, custom, end);
1700                         break;
1701                 }
1702
1703                 pos += iwe->len;
1704         }
1705         os_free(res_buf);
1706         res_buf = NULL;
1707         if (!first)
1708                 wpa_driver_wext_add_scan_entry(res, &data);
1709         os_free(data.ie);
1710
1711         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1712                    (unsigned long) len, (unsigned long) res->num);
1713
1714         return res;
1715 }
1716
1717
1718 static int wpa_driver_wext_get_range(void *priv)
1719 {
1720         struct wpa_driver_wext_data *drv = priv;
1721         struct iw_range *range;
1722         struct iwreq iwr;
1723         int minlen;
1724         size_t buflen;
1725
1726         /*
1727          * Use larger buffer than struct iw_range in order to allow the
1728          * structure to grow in the future.
1729          */
1730         buflen = sizeof(struct iw_range) + 500;
1731         range = os_zalloc(buflen);
1732         if (range == NULL)
1733                 return -1;
1734
1735         os_memset(&iwr, 0, sizeof(iwr));
1736         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1737         iwr.u.data.pointer = (caddr_t) range;
1738         iwr.u.data.length = buflen;
1739
1740         minlen = ((char *) &range->enc_capa) - (char *) range +
1741                 sizeof(range->enc_capa);
1742
1743         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1744                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIRANGE]");
1745                 os_free(range);
1746                 return -1;
1747         } else if (iwr.u.data.length >= minlen &&
1748                    range->we_version_compiled >= 18) {
1749                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1750                            "WE(source)=%d enc_capa=0x%x",
1751                            range->we_version_compiled,
1752                            range->we_version_source,
1753                            range->enc_capa);
1754                 drv->has_capability = 1;
1755                 drv->we_version_compiled = range->we_version_compiled;
1756                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1757                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1758                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1759                 }
1760                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1761                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1762                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1763                 }
1764                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1765                         WPA_DRIVER_CAPA_ENC_WEP104;
1766                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1767                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1768                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1769                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1770                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1771                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1772                 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1773                         WPA_DRIVER_AUTH_SHARED |
1774                         WPA_DRIVER_AUTH_LEAP;
1775
1776                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1777                            "flags 0x%x",
1778                            drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1779         } else {
1780                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1781                            "assuming WPA is not supported");
1782         }
1783
1784         os_free(range);
1785         return 0;
1786 }
1787
1788
1789 static int wpa_driver_wext_set_wpa(void *priv, int enabled)
1790 {
1791         struct wpa_driver_wext_data *drv = priv;
1792         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1793
1794         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1795                                               enabled);
1796 }
1797
1798
1799 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1800                                    const u8 *psk)
1801 {
1802         struct iw_encode_ext *ext;
1803         struct iwreq iwr;
1804         int ret;
1805
1806         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1807
1808         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1809                 return 0;
1810
1811         if (!psk)
1812                 return 0;
1813
1814         os_memset(&iwr, 0, sizeof(iwr));
1815         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1816
1817         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1818         if (ext == NULL)
1819                 return -1;
1820
1821         iwr.u.encoding.pointer = (caddr_t) ext;
1822         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1823         ext->key_len = PMK_LEN;
1824         os_memcpy(&ext->key, psk, ext->key_len);
1825         ext->alg = IW_ENCODE_ALG_PMK;
1826
1827         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1828         if (ret < 0)
1829                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT] PMK");
1830         os_free(ext);
1831
1832         return ret;
1833 }
1834
1835
1836 static int wpa_driver_wext_set_key_ext(void *priv, wpa_alg alg,
1837                                        const u8 *addr, int key_idx,
1838                                        int set_tx, const u8 *seq,
1839                                        size_t seq_len,
1840                                        const u8 *key, size_t key_len)
1841 {
1842         struct wpa_driver_wext_data *drv = priv;
1843         struct iwreq iwr;
1844         int ret = 0;
1845         struct iw_encode_ext *ext;
1846
1847         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1848                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1849                            __FUNCTION__, (unsigned long) seq_len);
1850                 return -1;
1851         }
1852
1853         ext = os_zalloc(sizeof(*ext) + key_len);
1854         if (ext == NULL)
1855                 return -1;
1856         os_memset(&iwr, 0, sizeof(iwr));
1857         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1858         iwr.u.encoding.flags = key_idx + 1;
1859         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1860         if (alg == WPA_ALG_NONE)
1861                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1862         iwr.u.encoding.pointer = (caddr_t) ext;
1863         iwr.u.encoding.length = sizeof(*ext) + key_len;
1864
1865         if (addr == NULL ||
1866             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1867                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1868         if (set_tx)
1869                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1870
1871         ext->addr.sa_family = ARPHRD_ETHER;
1872         if (addr)
1873                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1874         else
1875                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1876         if (key && key_len) {
1877                 os_memcpy(ext + 1, key, key_len);
1878                 ext->key_len = key_len;
1879         }
1880         switch (alg) {
1881         case WPA_ALG_NONE:
1882                 ext->alg = IW_ENCODE_ALG_NONE;
1883                 break;
1884         case WPA_ALG_WEP:
1885                 ext->alg = IW_ENCODE_ALG_WEP;
1886                 break;
1887         case WPA_ALG_TKIP:
1888                 ext->alg = IW_ENCODE_ALG_TKIP;
1889                 break;
1890         case WPA_ALG_CCMP:
1891                 ext->alg = IW_ENCODE_ALG_CCMP;
1892                 break;
1893         case WPA_ALG_PMK:
1894                 ext->alg = IW_ENCODE_ALG_PMK;
1895                 break;
1896 #ifdef CONFIG_IEEE80211W
1897         case WPA_ALG_IGTK:
1898                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1899                 break;
1900 #endif /* CONFIG_IEEE80211W */
1901         default:
1902                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1903                            __FUNCTION__, alg);
1904                 os_free(ext);
1905                 return -1;
1906         }
1907
1908         if (seq && seq_len) {
1909                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1910                 os_memcpy(ext->rx_seq, seq, seq_len);
1911         }
1912
1913         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1914                 ret = errno == EOPNOTSUPP ? -2 : -1;
1915                 if (errno == ENODEV) {
1916                         /*
1917                          * ndiswrapper seems to be returning incorrect error
1918                          * code.. */
1919                         ret = -2;
1920                 }
1921
1922                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT]");
1923         }
1924
1925         os_free(ext);
1926         return ret;
1927 }
1928
1929
1930 /**
1931  * wpa_driver_wext_set_key - Configure encryption key
1932  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1933  * @priv: Private driver interface data
1934  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1935  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1936  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1937  *      broadcast/default keys
1938  * @key_idx: key index (0..3), usually 0 for unicast keys
1939  * @set_tx: Configure this key as the default Tx key (only used when
1940  *      driver does not support separate unicast/individual key
1941  * @seq: Sequence number/packet number, seq_len octets, the next
1942  *      packet number to be used for in replay protection; configured
1943  *      for Rx keys (in most cases, this is only used with broadcast
1944  *      keys and set to zero for unicast keys)
1945  * @seq_len: Length of the seq, depends on the algorithm:
1946  *      TKIP: 6 octets, CCMP: 6 octets
1947  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1948  *      8-byte Rx Mic Key
1949  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1950  *      TKIP: 32, CCMP: 16)
1951  * Returns: 0 on success, -1 on failure
1952  *
1953  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1954  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1955  */
1956 int wpa_driver_wext_set_key(void *priv, wpa_alg alg,
1957                             const u8 *addr, int key_idx,
1958                             int set_tx, const u8 *seq, size_t seq_len,
1959                             const u8 *key, size_t key_len)
1960 {
1961         struct wpa_driver_wext_data *drv = priv;
1962         struct iwreq iwr;
1963         int ret = 0;
1964
1965         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1966                    "key_len=%lu",
1967                    __FUNCTION__, alg, key_idx, set_tx,
1968                    (unsigned long) seq_len, (unsigned long) key_len);
1969
1970         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1971                                           seq, seq_len, key, key_len);
1972         if (ret == 0)
1973                 return 0;
1974
1975         if (ret == -2 &&
1976             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1977                 wpa_printf(MSG_DEBUG, "Driver did not support "
1978                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1979                 ret = 0;
1980         } else {
1981                 wpa_printf(MSG_DEBUG, "Driver did not support "
1982                            "SIOCSIWENCODEEXT");
1983                 return ret;
1984         }
1985
1986         os_memset(&iwr, 0, sizeof(iwr));
1987         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1988         iwr.u.encoding.flags = key_idx + 1;
1989         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1990         if (alg == WPA_ALG_NONE)
1991                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1992         iwr.u.encoding.pointer = (caddr_t) key;
1993         iwr.u.encoding.length = key_len;
1994
1995         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1996                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]");
1997                 ret = -1;
1998         }
1999
2000         if (set_tx && alg != WPA_ALG_NONE) {
2001                 os_memset(&iwr, 0, sizeof(iwr));
2002                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2003                 iwr.u.encoding.flags = key_idx + 1;
2004                 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
2005                 iwr.u.encoding.pointer = (caddr_t) NULL;
2006                 iwr.u.encoding.length = 0;
2007                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2008                         wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE] (set_tx)");
2009                         ret = -1;
2010                 }
2011         }
2012
2013         return ret;
2014 }
2015
2016
2017 static int wpa_driver_wext_set_countermeasures(void *priv,
2018                                                int enabled)
2019 {
2020         struct wpa_driver_wext_data *drv = priv;
2021         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2022         return wpa_driver_wext_set_auth_param(drv,
2023                                               IW_AUTH_TKIP_COUNTERMEASURES,
2024                                               enabled);
2025 }
2026
2027
2028 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
2029                                                 int enabled)
2030 {
2031         struct wpa_driver_wext_data *drv = priv;
2032         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2033         drv->use_crypt = enabled;
2034         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2035                                               enabled);
2036 }
2037
2038
2039 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
2040                                 const u8 *addr, int cmd, int reason_code)
2041 {
2042         struct iwreq iwr;
2043         struct iw_mlme mlme;
2044         int ret = 0;
2045
2046         os_memset(&iwr, 0, sizeof(iwr));
2047         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2048         os_memset(&mlme, 0, sizeof(mlme));
2049         mlme.cmd = cmd;
2050         mlme.reason_code = reason_code;
2051         mlme.addr.sa_family = ARPHRD_ETHER;
2052         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
2053         iwr.u.data.pointer = (caddr_t) &mlme;
2054         iwr.u.data.length = sizeof(mlme);
2055
2056         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
2057                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMLME]");
2058                 ret = -1;
2059         }
2060
2061         return ret;
2062 }
2063
2064
2065 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
2066 {
2067         struct iwreq iwr;
2068         const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
2069 #ifndef ANDROID
2070         u8 ssid[32];
2071         int i;
2072 #endif
2073
2074         /*
2075          * Only force-disconnect when the card is in infrastructure mode,
2076          * otherwise the driver might interpret the cleared BSSID and random
2077          * SSID as an attempt to create a new ad-hoc network.
2078          */
2079         os_memset(&iwr, 0, sizeof(iwr));
2080         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2081         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2082                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]");
2083                 iwr.u.mode = IW_MODE_INFRA;
2084         }
2085
2086         if (iwr.u.mode == IW_MODE_INFRA) {
2087                 /*
2088                  * Clear the BSSID selection and set a random SSID to make sure
2089                  * the driver will not be trying to associate with something
2090                  * even if it does not understand SIOCSIWMLME commands (or
2091                  * tries to associate automatically after deauth/disassoc).
2092                  */
2093                 wpa_driver_wext_set_bssid(drv, null_bssid);
2094 #ifndef ANDROID
2095                 for (i = 0; i < 32; i++)
2096                         ssid[i] = rand() & 0xFF;
2097                 wpa_driver_wext_set_ssid(drv, ssid, 32);
2098 #endif
2099         }
2100 }
2101
2102
2103 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
2104                                           int reason_code)
2105 {
2106         struct wpa_driver_wext_data *drv = priv;
2107         int ret;
2108         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2109         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2110         wpa_driver_wext_disconnect(drv);
2111         return ret;
2112 }
2113
2114
2115 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
2116                                         int reason_code)
2117 {
2118         struct wpa_driver_wext_data *drv = priv;
2119         int ret;
2120         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2121         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC, reason_code);
2122         wpa_driver_wext_disconnect(drv);
2123         return ret;
2124 }
2125
2126
2127 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
2128                                       size_t ie_len)
2129 {
2130         struct wpa_driver_wext_data *drv = priv;
2131         struct iwreq iwr;
2132         int ret = 0;
2133
2134         os_memset(&iwr, 0, sizeof(iwr));
2135         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2136         iwr.u.data.pointer = (caddr_t) ie;
2137         iwr.u.data.length = ie_len;
2138
2139         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2140                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWGENIE]");
2141                 ret = -1;
2142         }
2143
2144         return ret;
2145 }
2146
2147
2148 int wpa_driver_wext_cipher2wext(int cipher)
2149 {
2150         switch (cipher) {
2151         case CIPHER_NONE:
2152                 return IW_AUTH_CIPHER_NONE;
2153         case CIPHER_WEP40:
2154                 return IW_AUTH_CIPHER_WEP40;
2155         case CIPHER_TKIP:
2156                 return IW_AUTH_CIPHER_TKIP;
2157         case CIPHER_CCMP:
2158                 return IW_AUTH_CIPHER_CCMP;
2159         case CIPHER_WEP104:
2160                 return IW_AUTH_CIPHER_WEP104;
2161         default:
2162                 return 0;
2163         }
2164 }
2165
2166
2167 int wpa_driver_wext_keymgmt2wext(int keymgmt)
2168 {
2169         switch (keymgmt) {
2170         case KEY_MGMT_802_1X:
2171         case KEY_MGMT_802_1X_NO_WPA:
2172                 return IW_AUTH_KEY_MGMT_802_1X;
2173         case KEY_MGMT_PSK:
2174                 return IW_AUTH_KEY_MGMT_PSK;
2175         default:
2176                 return 0;
2177         }
2178 }
2179
2180
2181 static int
2182 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
2183                                   struct wpa_driver_associate_params *params)
2184 {
2185         struct iwreq iwr;
2186         int ret = 0;
2187
2188         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2189                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2190
2191         os_memset(&iwr, 0, sizeof(iwr));
2192         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2193         /* Just changing mode, not actual keys */
2194         iwr.u.encoding.flags = 0;
2195         iwr.u.encoding.pointer = (caddr_t) NULL;
2196         iwr.u.encoding.length = 0;
2197
2198         /*
2199          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2200          * different things. Here they are used to indicate Open System vs.
2201          * Shared Key authentication algorithm. However, some drivers may use
2202          * them to select between open/restricted WEP encrypted (open = allow
2203          * both unencrypted and encrypted frames; restricted = only allow
2204          * encrypted frames).
2205          */
2206
2207         if (!drv->use_crypt) {
2208                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2209         } else {
2210                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2211                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2212                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2213                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2214         }
2215
2216         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2217                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]");
2218                 ret = -1;
2219         }
2220
2221         return ret;
2222 }
2223
2224
2225 int wpa_driver_wext_associate(void *priv,
2226                               struct wpa_driver_associate_params *params)
2227 {
2228         struct wpa_driver_wext_data *drv = priv;
2229         int ret = 0;
2230         int allow_unencrypted_eapol;
2231         int value, flags;
2232
2233         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2234
2235 #ifdef ANDROID
2236         drv->skip_disconnect = 0;
2237 #endif
2238
2239         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2240                 if (!(flags & IFF_UP)) {
2241                         wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2242                 }
2243         }
2244
2245         /*
2246          * If the driver did not support SIOCSIWAUTH, fallback to
2247          * SIOCSIWENCODE here.
2248          */
2249         if (drv->auth_alg_fallback &&
2250             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2251                 ret = -1;
2252
2253         if (!params->bssid &&
2254             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2255                 ret = -1;
2256
2257         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2258          * from configuration, not from here, where only the selected suite is
2259          * available */
2260         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2261             < 0)
2262                 ret = -1;
2263         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2264                 value = IW_AUTH_WPA_VERSION_DISABLED;
2265         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2266                 value = IW_AUTH_WPA_VERSION_WPA2;
2267         else
2268                 value = IW_AUTH_WPA_VERSION_WPA;
2269         if (wpa_driver_wext_set_auth_param(drv,
2270                                            IW_AUTH_WPA_VERSION, value) < 0)
2271                 ret = -1;
2272         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2273         if (wpa_driver_wext_set_auth_param(drv,
2274                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2275                 ret = -1;
2276         value = wpa_driver_wext_cipher2wext(params->group_suite);
2277         if (wpa_driver_wext_set_auth_param(drv,
2278                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2279                 ret = -1;
2280         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2281         if (wpa_driver_wext_set_auth_param(drv,
2282                                            IW_AUTH_KEY_MGMT, value) < 0)
2283                 ret = -1;
2284         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2285                 params->pairwise_suite != CIPHER_NONE ||
2286                 params->group_suite != CIPHER_NONE ||
2287                 params->wpa_ie_len;
2288         if (wpa_driver_wext_set_auth_param(drv,
2289                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2290                 ret = -1;
2291
2292         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2293          * not using WPA. IEEE 802.1X specifies that these frames are not
2294          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2295         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2296             params->key_mgmt_suite == KEY_MGMT_PSK)
2297                 allow_unencrypted_eapol = 0;
2298         else
2299                 allow_unencrypted_eapol = 1;
2300
2301         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2302                 ret = -1;
2303         if (wpa_driver_wext_set_auth_param(drv,
2304                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2305                                            allow_unencrypted_eapol) < 0)
2306                 ret = -1;
2307 #ifdef CONFIG_IEEE80211W
2308         switch (params->mgmt_frame_protection) {
2309         case NO_MGMT_FRAME_PROTECTION:
2310                 value = IW_AUTH_MFP_DISABLED;
2311                 break;
2312         case MGMT_FRAME_PROTECTION_OPTIONAL:
2313                 value = IW_AUTH_MFP_OPTIONAL;
2314                 break;
2315         case MGMT_FRAME_PROTECTION_REQUIRED:
2316                 value = IW_AUTH_MFP_REQUIRED;
2317                 break;
2318         };
2319         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2320                 ret = -1;
2321 #endif /* CONFIG_IEEE80211W */
2322         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2323                 ret = -1;
2324         if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2325                 ret = -1;
2326         if (params->bssid &&
2327             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2328                 ret = -1;
2329
2330         return ret;
2331 }
2332
2333
2334 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2335 {
2336         struct wpa_driver_wext_data *drv = priv;
2337         int algs = 0, res;
2338
2339         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2340                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2341         if (auth_alg & AUTH_ALG_SHARED_KEY)
2342                 algs |= IW_AUTH_ALG_SHARED_KEY;
2343         if (auth_alg & AUTH_ALG_LEAP)
2344                 algs |= IW_AUTH_ALG_LEAP;
2345         if (algs == 0) {
2346                 /* at least one algorithm should be set */
2347                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2348         }
2349
2350         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2351                                              algs);
2352         drv->auth_alg_fallback = res == -2;
2353         return res;
2354 }
2355
2356
2357 /**
2358  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2359  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2360  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2361  * Returns: 0 on success, -1 on failure
2362  */
2363 int wpa_driver_wext_set_mode(void *priv, int mode)
2364 {
2365         struct wpa_driver_wext_data *drv = priv;
2366         struct iwreq iwr;
2367         int ret = -1, flags;
2368         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2369
2370         os_memset(&iwr, 0, sizeof(iwr));
2371         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2372         iwr.u.mode = new_mode;
2373         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2374                 ret = 0;
2375                 goto done;
2376         }
2377
2378         if (errno != EBUSY) {
2379                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]");
2380                 goto done;
2381         }
2382
2383         /* mac80211 doesn't allow mode changes while the device is up, so if
2384          * the device isn't in the mode we're about to change to, take device
2385          * down, try to set the mode again, and bring it back up.
2386          */
2387         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2388                 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]");
2389                 goto done;
2390         }
2391
2392         if (iwr.u.mode == new_mode) {
2393                 ret = 0;
2394                 goto done;
2395         }
2396
2397         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2398                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2399
2400                 /* Try to set the mode again while the interface is down */
2401                 iwr.u.mode = new_mode;
2402                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2403                         wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]");
2404                 else
2405                         ret = 0;
2406
2407                 /* Ignore return value of get_ifflags to ensure that the device
2408                  * is always up like it was before this function was called.
2409                  */
2410                 (void) wpa_driver_wext_get_ifflags(drv, &flags);
2411                 (void) wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2412         }
2413
2414 done:
2415         return ret;
2416 }
2417
2418
2419 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2420                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2421 {
2422         struct iwreq iwr;
2423         struct iw_pmksa pmksa;
2424         int ret = 0;
2425
2426         os_memset(&iwr, 0, sizeof(iwr));
2427         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2428         os_memset(&pmksa, 0, sizeof(pmksa));
2429         pmksa.cmd = cmd;
2430         pmksa.bssid.sa_family = ARPHRD_ETHER;
2431         if (bssid)
2432                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2433         if (pmkid)
2434                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2435         iwr.u.data.pointer = (caddr_t) &pmksa;
2436         iwr.u.data.length = sizeof(pmksa);
2437
2438         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2439                 if (errno != EOPNOTSUPP)
2440                         wpa_printf(MSG_ERROR, "ioctl[SIOCSIWPMKSA]");
2441                 ret = -1;
2442         }
2443
2444         return ret;
2445 }
2446
2447
2448 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2449                                      const u8 *pmkid)
2450 {
2451         struct wpa_driver_wext_data *drv = priv;
2452         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2453 }
2454
2455
2456 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2457                                         const u8 *pmkid)
2458 {
2459         struct wpa_driver_wext_data *drv = priv;
2460         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2461 }
2462
2463
2464 static int wpa_driver_wext_flush_pmkid(void *priv)
2465 {
2466         struct wpa_driver_wext_data *drv = priv;
2467         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2468 }
2469
2470
2471 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2472 {
2473         struct wpa_driver_wext_data *drv = priv;
2474         if (!drv->has_capability)
2475                 return -1;
2476         os_memcpy(capa, &drv->capa, sizeof(*capa));
2477         return 0;
2478 }
2479
2480
2481 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2482                                         const char *ifname)
2483 {
2484         if (ifname == NULL) {
2485                 drv->ifindex2 = -1;
2486                 return 0;
2487         }
2488
2489         drv->ifindex2 = if_nametoindex(ifname);
2490         if (drv->ifindex2 <= 0)
2491                 return -1;
2492
2493         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2494                    "wireless events", drv->ifindex2, ifname);
2495
2496         return 0;
2497 }
2498
2499
2500 int wpa_driver_wext_set_operstate(void *priv, int state)
2501 {
2502         struct wpa_driver_wext_data *drv = priv;
2503
2504         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2505                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2506         drv->operstate = state;
2507         return wpa_driver_wext_send_oper_ifla(
2508                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2509 }
2510
2511
2512 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2513 {
2514         return drv->we_version_compiled;
2515 }
2516
2517
2518 #ifdef ANDROID
2519 static int wpa_driver_wext_set_cscan_params(char *buf, size_t buf_len, char *cmd)
2520 {
2521         char *pasv_ptr;
2522         int bp, i;
2523         u16 pasv_dwell = WEXT_CSCAN_PASV_DWELL_TIME_DEF;
2524         u8 channel;
2525
2526         wpa_printf(MSG_DEBUG, "%s: %s", __func__, cmd);
2527
2528         /* Get command parameters */
2529         pasv_ptr = os_strstr(cmd, ",TIME=");
2530         if (pasv_ptr) {
2531                 *pasv_ptr = '\0';
2532                 pasv_ptr += 6;
2533                 pasv_dwell = (u16)atoi(pasv_ptr);
2534                 if (pasv_dwell == 0)
2535                         pasv_dwell = WEXT_CSCAN_PASV_DWELL_TIME_DEF;
2536         }
2537         channel = (u8)atoi(cmd + 5);
2538
2539         bp = WEXT_CSCAN_HEADER_SIZE;
2540         os_memcpy(buf, WEXT_CSCAN_HEADER, bp);
2541
2542         /* Set list of channels */
2543         buf[bp++] = WEXT_CSCAN_CHANNEL_SECTION;
2544         buf[bp++] = channel;
2545         if (channel != 0) {
2546                 i = (pasv_dwell - 1) / WEXT_CSCAN_PASV_DWELL_TIME_DEF;
2547                 for (; i > 0; i--) {
2548                         if ((size_t)(bp + 12) >= buf_len)
2549                                 break;
2550                         buf[bp++] = WEXT_CSCAN_CHANNEL_SECTION;
2551                         buf[bp++] = channel;
2552                 }
2553         } else {
2554                 if (pasv_dwell > WEXT_CSCAN_PASV_DWELL_TIME_MAX)
2555                         pasv_dwell = WEXT_CSCAN_PASV_DWELL_TIME_MAX;
2556         }
2557
2558         /* Set passive dwell time (default is 250) */
2559         buf[bp++] = WEXT_CSCAN_PASV_DWELL_SECTION;
2560         if (channel != 0) {
2561                 buf[bp++] = (u8)WEXT_CSCAN_PASV_DWELL_TIME_DEF;
2562                 buf[bp++] = (u8)(WEXT_CSCAN_PASV_DWELL_TIME_DEF >> 8);
2563         } else {
2564                 buf[bp++] = (u8)pasv_dwell;
2565                 buf[bp++] = (u8)(pasv_dwell >> 8);
2566         }
2567
2568         /* Set home dwell time (default is 40) */
2569         buf[bp++] = WEXT_CSCAN_HOME_DWELL_SECTION;
2570         buf[bp++] = (u8)WEXT_CSCAN_HOME_DWELL_TIME;
2571         buf[bp++] = (u8)(WEXT_CSCAN_HOME_DWELL_TIME >> 8);
2572
2573         /* Set cscan type */
2574         buf[bp++] = WEXT_CSCAN_TYPE_SECTION;
2575         buf[bp++] = WEXT_CSCAN_TYPE_PASSIVE;
2576         return bp;
2577 }
2578
2579 static char *wpa_driver_get_country_code(int channels)
2580 {
2581         char *country = "US"; /* WEXT_NUMBER_SCAN_CHANNELS_FCC */
2582
2583         if (channels == WEXT_NUMBER_SCAN_CHANNELS_ETSI)
2584                 country = "EU";
2585         else if( channels == WEXT_NUMBER_SCAN_CHANNELS_MKK1)
2586                 country = "JP";
2587         return country;
2588 }
2589
2590 static int wpa_driver_priv_driver_cmd( void *priv, char *cmd, char *buf, size_t buf_len )
2591 {
2592         struct wpa_driver_wext_data *drv = priv;
2593         struct wpa_supplicant *wpa_s = (struct wpa_supplicant *)(drv->ctx);
2594         struct iwreq iwr;
2595         int ret = 0, flags;
2596
2597         wpa_printf(MSG_DEBUG, "%s %s len = %d", __func__, cmd, buf_len);
2598
2599         if (!drv->driver_is_started && (os_strcasecmp(cmd, "START") != 0)) {
2600                 wpa_printf(MSG_ERROR,"WEXT: Driver not initialized yet");
2601                 return -1;
2602         }
2603
2604         if (os_strcasecmp(cmd, "RSSI-APPROX") == 0) {
2605                 os_strncpy(cmd, "RSSI", MAX_DRV_CMD_SIZE);
2606         } else if( os_strncasecmp(cmd, "SCAN-CHANNELS", 13) == 0 ) {
2607                 int no_of_chan;
2608
2609                 no_of_chan = atoi(cmd + 13);
2610                 os_snprintf(cmd, MAX_DRV_CMD_SIZE, "COUNTRY %s",
2611                         wpa_driver_get_country_code(no_of_chan));
2612         } else if (os_strcasecmp(cmd, "STOP") == 0) {
2613                 if ((wpa_driver_wext_get_ifflags(drv, &flags) == 0) &&
2614                     (flags & IFF_UP)) {
2615                         wpa_printf(MSG_ERROR, "WEXT: %s when iface is UP", cmd);
2616                         wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2617                 }
2618         } else if( os_strcasecmp(cmd, "RELOAD") == 0 ) {
2619                 wpa_printf(MSG_DEBUG,"Reload command");
2620                 wpa_msg(drv->ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "HANGED");
2621                 return ret;
2622         }
2623
2624         os_memset(&iwr, 0, sizeof(iwr));
2625         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2626         os_memcpy(buf, cmd, strlen(cmd) + 1);
2627         iwr.u.data.pointer = buf;
2628         iwr.u.data.length = buf_len;
2629
2630         if( os_strncasecmp(cmd, "CSCAN", 5) == 0 ) {
2631                 if (!wpa_s->scanning && ((wpa_s->wpa_state <= WPA_SCANNING) ||
2632                                         (wpa_s->wpa_state >= WPA_COMPLETED))) {
2633                         iwr.u.data.length = wpa_driver_wext_set_cscan_params(buf, buf_len, cmd);
2634                 } else {
2635                         wpa_printf(MSG_ERROR, "Ongoing Scan action...");
2636                         return ret;
2637                 }
2638         }
2639
2640         ret = ioctl(drv->ioctl_sock, SIOCSIWPRIV, &iwr);
2641
2642         if (ret < 0) {
2643                 wpa_printf(MSG_ERROR, "%s failed (%d): %s", __func__, ret, cmd);
2644                 drv->errors++;
2645                 if (drv->errors > WEXT_NUMBER_SEQUENTIAL_ERRORS) {
2646                         drv->errors = 0;
2647                         wpa_msg(drv->ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "HANGED");
2648                 }
2649         } else {
2650                 drv->errors = 0;
2651                 ret = 0;
2652                 if ((os_strcasecmp(cmd, "RSSI") == 0) ||
2653                     (os_strcasecmp(cmd, "LINKSPEED") == 0) ||
2654                     (os_strcasecmp(cmd, "MACADDR") == 0) ||
2655                     (os_strcasecmp(cmd, "GETPOWER") == 0) ||
2656                     (os_strcasecmp(cmd, "GETBAND") == 0)) {
2657                         ret = strlen(buf);
2658                 } else if (os_strcasecmp(cmd, "START") == 0) {
2659                         drv->driver_is_started = TRUE;
2660                         /* os_sleep(0, WPA_DRIVER_WEXT_WAIT_US);
2661                         wpa_msg(drv->ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STARTED"); */
2662                 } else if (os_strcasecmp(cmd, "STOP") == 0) {
2663                         drv->driver_is_started = FALSE;
2664                         /* wpa_msg(drv->ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STOPPED"); */
2665                 } else if (os_strncasecmp(cmd, "CSCAN", 5) == 0) {
2666                         wpa_driver_wext_set_scan_timeout(priv);
2667                         wpa_supplicant_notify_scanning(wpa_s, 1);
2668                 }
2669                 wpa_printf(MSG_DEBUG, "%s %s len = %d, %d", __func__, buf, ret, strlen(buf));
2670         }
2671         return ret;
2672 }
2673 #endif
2674
2675
2676 const struct wpa_driver_ops wpa_driver_wext_ops = {
2677         .name = "wext",
2678         .desc = "Linux wireless extensions (generic)",
2679         .get_bssid = wpa_driver_wext_get_bssid,
2680         .get_ssid = wpa_driver_wext_get_ssid,
2681         .set_wpa = wpa_driver_wext_set_wpa,
2682         .set_key = wpa_driver_wext_set_key,
2683         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2684         .set_drop_unencrypted = wpa_driver_wext_set_drop_unencrypted,
2685         .scan = wpa_driver_wext_scan,
2686         .combo_scan = wpa_driver_wext_combo_scan,
2687         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2688         .deauthenticate = wpa_driver_wext_deauthenticate,
2689         .disassociate = wpa_driver_wext_disassociate,
2690         .set_mode = wpa_driver_wext_set_mode,
2691         .associate = wpa_driver_wext_associate,
2692         .set_auth_alg = wpa_driver_wext_set_auth_alg,
2693         .init = wpa_driver_wext_init,
2694         .deinit = wpa_driver_wext_deinit,
2695         .add_pmkid = wpa_driver_wext_add_pmkid,
2696         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2697         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2698         .get_capa = wpa_driver_wext_get_capa,
2699         .set_operstate = wpa_driver_wext_set_operstate,
2700 #ifdef ANDROID
2701         .driver_cmd = wpa_driver_priv_driver_cmd,
2702 #endif
2703 };