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