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 "l2_packet.h"
  30 #include "eloop.h"
  31 #include "wpa_supplicant.h"
  32 #include "priv_netlink.h"
  33 #include "driver_wext.h"
  34 #include "wpa.h"
  35 #include "wpa_ctrl.h"
  36 #include "wpa_supplicant_i.h"
  37 #include "config_ssid.h"
  38
  39 #ifdef CONFIG_CLIENT_MLME
  40 #include <netpacket/packet.h>
  41 #include <hostapd_ioctl.h>
  42 #include <ieee80211_common.h>
  43 /* from net/mac80211.h */
  44 enum {
  45         MODE_IEEE80211A = 0 /* IEEE 802.11a */,
  46         MODE_IEEE80211B = 1 /* IEEE 802.11b only */,
  47         MODE_ATHEROS_TURBO = 2 /* Atheros Turbo mode (2x.11a at 5 GHz) */,
  48         MODE_IEEE80211G = 3 /* IEEE 802.11g (and 802.11b compatibility) */,
  49         MODE_ATHEROS_TURBOG = 4 /* Atheros Turbo mode (2x.11g at 2.4 GHz) */,
  50         NUM_IEEE80211_MODES = 5
  51 };
  52
  53 #include "mlme.h"
  54
  55 #ifndef ETH_P_ALL
  56 #define ETH_P_ALL 0x0003
  57 #endif
  58 #endif /* CONFIG_CLIENT_MLME */
  59
  60
  61 struct wpa_driver_wext_data {
  62         void *ctx;
  63         int event_sock;
  64         int ioctl_sock;
  65         int mlme_sock;
  66         char ifname[IFNAMSIZ + 1];
  67         int ifindex;
  68         int ifindex2;
  69         int if_removed;
  70         u8 *assoc_req_ies;
  71         size_t assoc_req_ies_len;
  72         u8 *assoc_resp_ies;
  73         size_t assoc_resp_ies_len;
  74         struct wpa_driver_capa capa;
  75         int has_capability;
  76         int we_version_compiled;
  77
  78         /* for set_auth_alg fallback */
  79         int use_crypt;
  80         int auth_alg_fallback;
  81
  82         int operstate;
  83
  84         char mlmedev[IFNAMSIZ + 1];
  85
  86         int scan_complete_events;
  87 };
  88
  89
  90 static int wpa_driver_wext_flush_pmkid(void *priv);
  91 static int wpa_driver_wext_get_range(void *priv);
  92 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
  93
  94
  95 static int wpa_driver_wext_send_oper_ifla(struct wpa_driver_wext_data *drv,
  96                                           int linkmode, int operstate)
  97 {
  98         struct {
  99                 struct nlmsghdr hdr;
 100                 struct ifinfomsg ifinfo;
 101                 char opts[16];
 102         } req;
 103         struct rtattr *rta;
 104         static int nl_seq;
 105         ssize_t ret;
 106
 107         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 108         req.hdr.nlmsg_type = RTM_SETLINK;
 109         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 110         req.hdr.nlmsg_seq = ++nl_seq;
 111         req.hdr.nlmsg_pid = 0;
 112
 113         req.ifinfo.ifi_family = AF_UNSPEC;
 114         req.ifinfo.ifi_type = 0;
 115         req.ifinfo.ifi_index = drv->ifindex;
 116         req.ifinfo.ifi_flags = 0;
 117         req.ifinfo.ifi_change = 0;
 118
 119         if (linkmode != -1) {
 120                 rta = (struct rtattr *)
 121                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 122                 rta->rta_type = IFLA_LINKMODE;
 123                 rta->rta_len = RTA_LENGTH(sizeof(char));
 124                 *((char *) RTA_DATA(rta)) = linkmode;
 125                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 126                         RTA_LENGTH(sizeof(char));
 127         }
 128         if (operstate != -1) {
 129                 rta = (struct rtattr *)
 130                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 131                 rta->rta_type = IFLA_OPERSTATE;
 132                 rta->rta_len = RTA_LENGTH(sizeof(char));
 133                 *((char *) RTA_DATA(rta)) = operstate;
 134                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 135                         RTA_LENGTH(sizeof(char));
 136         }
 137
 138         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 139                    linkmode, operstate);
 140
 141         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 142         if (ret < 0) {
 143                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 144                            "%s (assume operstate is not supported)",
 145                            strerror(errno));
 146         }
 147
 148         return ret < 0 ? -1 : 0;
 149 }
 150
 151
 152 static int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
 153                                           int idx, u32 value)
 154 {
 155         struct iwreq iwr;
 156         int ret = 0;
 157
 158         os_memset(&iwr, 0, sizeof(iwr));
 159         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 160         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 161         iwr.u.param.value = value;
 162
 163         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 164                 if (errno != EOPNOTSUPP) {
 165                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 166                                    "value 0x%x) failed: %s)",
 167                                    idx, value, strerror(errno));
 168                 }
 169                 ret = errno == EOPNOTSUPP ? -2 : -1;
 170         }
 171
 172         return ret;
 173 }
 174
 175
 176 /**
 177  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
 178  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 179  * @bssid: Buffer for BSSID
 180  * Returns: 0 on success, -1 on failure
 181  */
 182 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
 183 {
 184         struct wpa_driver_wext_data *drv = priv;
 185         struct iwreq iwr;
 186         int ret = 0;
 187
 188         os_memset(&iwr, 0, sizeof(iwr));
 189         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 190
 191         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 192                 perror("ioctl[SIOCGIWAP]");
 193                 ret = -1;
 194         }
 195         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 196
 197         return ret;
 198 }
 199
 200
 201 /**
 202  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
 203  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 204  * @bssid: BSSID
 205  * Returns: 0 on success, -1 on failure
 206  */
 207 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
 208 {
 209         struct wpa_driver_wext_data *drv = priv;
 210         struct iwreq iwr;
 211         int ret = 0;
 212
 213         os_memset(&iwr, 0, sizeof(iwr));
 214         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 215         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 216         if (bssid)
 217                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 218         else
 219                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 220
 221         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 222                 perror("ioctl[SIOCSIWAP]");
 223                 ret = -1;
 224         }
 225
 226         return ret;
 227 }
 228
 229
 230 /**
 231  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 232  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 233  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 234  * Returns: SSID length on success, -1 on failure
 235  */
 236 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 237 {
 238         struct wpa_driver_wext_data *drv = priv;
 239         struct iwreq iwr;
 240         int ret = 0;
 241
 242         os_memset(&iwr, 0, sizeof(iwr));
 243         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 244         iwr.u.essid.pointer = (caddr_t) ssid;
 245         iwr.u.essid.length = 32;
 246
 247         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 248                 perror("ioctl[SIOCGIWESSID]");
 249                 ret = -1;
 250         } else {
 251                 ret = iwr.u.essid.length;
 252                 if (ret > 32)
 253                         ret = 32;
 254                 /* Some drivers include nul termination in the SSID, so let's
 255                  * remove it here before further processing. WE-21 changes this
 256                  * to explicitly require the length _not_ to include nul
 257                  * termination. */
 258                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 259                     drv->we_version_compiled < 21)
 260                         ret--;
 261         }
 262
 263         return ret;
 264 }
 265
 266
 267 /**
 268  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 269  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 270  * @ssid: SSID
 271  * @ssid_len: Length of SSID (0..32)
 272  * Returns: 0 on success, -1 on failure
 273  */
 274 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 275 {
 276         struct wpa_driver_wext_data *drv = priv;
 277         struct iwreq iwr;
 278         int ret = 0;
 279         char buf[33];
 280
 281         if (ssid_len > 32)
 282                 return -1;
 283
 284         os_memset(&iwr, 0, sizeof(iwr));
 285         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 286         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 287         iwr.u.essid.flags = (ssid_len != 0);
 288         os_memset(buf, 0, sizeof(buf));
 289         os_memcpy(buf, ssid, ssid_len);
 290         iwr.u.essid.pointer = (caddr_t) buf;
 291         if (drv->we_version_compiled < 21) {
 292                 /* For historic reasons, set SSID length to include one extra
 293                  * character, C string nul termination, even though SSID is
 294                  * really an octet string that should not be presented as a C
 295                  * string. Some Linux drivers decrement the length by one and
 296                  * can thus end up missing the last octet of the SSID if the
 297                  * length is not incremented here. WE-21 changes this to
 298                  * explicitly require the length _not_ to include nul
 299                  * termination. */
 300                 if (ssid_len)
 301                         ssid_len++;
 302         }
 303         iwr.u.essid.length = ssid_len;
 304
 305         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 306                 perror("ioctl[SIOCSIWESSID]");
 307                 ret = -1;
 308         }
 309
 310         return ret;
 311 }
 312
 313
 314 /**
 315  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 316  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 317  * @freq: Frequency in MHz
 318  * Returns: 0 on success, -1 on failure
 319  */
 320 int wpa_driver_wext_set_freq(void *priv, int freq)
 321 {
 322         struct wpa_driver_wext_data *drv = priv;
 323         struct iwreq iwr;
 324         int ret = 0;
 325
 326         os_memset(&iwr, 0, sizeof(iwr));
 327         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 328         iwr.u.freq.m = freq * 100000;
 329         iwr.u.freq.e = 1;
 330
 331         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 332                 perror("ioctl[SIOCSIWFREQ]");
 333                 ret = -1;
 334         }
 335
 336         return ret;
 337 }
 338
 339
 340 static void
 341 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 342 {
 343         union wpa_event_data data;
 344
 345         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 346                    custom);
 347
 348         os_memset(&data, 0, sizeof(data));
 349         /* Host AP driver */
 350         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 351                 data.michael_mic_failure.unicast =
 352                         os_strstr(custom, " unicast ") != NULL;
 353                 /* TODO: parse parameters(?) */
 354                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 355         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 356                 char *spos;
 357                 int bytes;
 358
 359                 spos = custom + 17;
 360
 361                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 362                 if (!bytes || (bytes & 1))
 363                         return;
 364                 bytes /= 2;
 365
 366                 data.assoc_info.req_ies = os_malloc(bytes);
 367                 if (data.assoc_info.req_ies == NULL)
 368                         return;
 369
 370                 data.assoc_info.req_ies_len = bytes;
 371                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 372
 373                 spos += bytes * 2;
 374
 375                 data.assoc_info.resp_ies = NULL;
 376                 data.assoc_info.resp_ies_len = 0;
 377
 378                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 379                         spos += 9;
 380
 381                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 382                         if (!bytes || (bytes & 1))
 383                                 goto done;
 384                         bytes /= 2;
 385
 386                         data.assoc_info.resp_ies = os_malloc(bytes);
 387                         if (data.assoc_info.resp_ies == NULL)
 388                                 goto done;
 389
 390                         data.assoc_info.resp_ies_len = bytes;
 391                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 392                 }
 393
 394                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 395
 396         done:
 397                 os_free(data.assoc_info.resp_ies);
 398                 os_free(data.assoc_info.req_ies);
 399 #ifdef CONFIG_PEERKEY
 400         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 401                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 402                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 403                                    "STKSTART.request '%s'", custom + 17);
 404                         return;
 405                 }
 406                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 407 #endif /* CONFIG_PEERKEY */
 408 #ifdef ANDROID
 409         } else if (os_strncmp(custom, "STOP", 4) == 0) {
 410                 wpa_msg(ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STOPPED");
 411         } else if (os_strncmp(custom, "START", 5) == 0) {
 412                 wpa_msg(ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STARTED");
 413 #endif /* ANDROID */
 414         }
 415 }
 416
 417
 418 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 419         void *ctx, const char *ev, size_t len)
 420 {
 421         const struct iw_michaelmicfailure *mic;
 422         union wpa_event_data data;
 423
 424         if (len < sizeof(*mic))
 425                 return -1;
 426
 427         mic = (const struct iw_michaelmicfailure *) ev;
 428
 429         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 430                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 431                    MAC2STR(mic->src_addr.sa_data));
 432
 433         os_memset(&data, 0, sizeof(data));
 434         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 435         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 436
 437         return 0;
 438 }
 439
 440
 441 static int wpa_driver_wext_event_wireless_pmkidcand(
 442         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 443 {
 444         const struct iw_pmkid_cand *cand;
 445         union wpa_event_data data;
 446         const u8 *addr;
 447
 448         if (len < sizeof(*cand))
 449                 return -1;
 450
 451         cand = (const struct iw_pmkid_cand *) ev;
 452         addr = (const u8 *) cand->bssid.sa_data;
 453
 454         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 455                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 456                    cand->index, MAC2STR(addr));
 457
 458         os_memset(&data, 0, sizeof(data));
 459         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 460         data.pmkid_candidate.index = cand->index;
 461         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 462         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 463
 464         return 0;
 465 }
 466
 467
 468 static int wpa_driver_wext_event_wireless_assocreqie(
 469         struct wpa_driver_wext_data *drv, const char *ev, int len)
 470 {
 471         if (len < 0)
 472                 return -1;
 473
 474         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 475                     len);
 476         os_free(drv->assoc_req_ies);
 477         drv->assoc_req_ies = os_malloc(len);
 478         if (drv->assoc_req_ies == NULL) {
 479                 drv->assoc_req_ies_len = 0;
 480                 return -1;
 481         }
 482         os_memcpy(drv->assoc_req_ies, ev, len);
 483         drv->assoc_req_ies_len = len;
 484
 485         return 0;
 486 }
 487
 488
 489 static int wpa_driver_wext_event_wireless_assocrespie(
 490         struct wpa_driver_wext_data *drv, const char *ev, int len)
 491 {
 492         if (len < 0)
 493                 return -1;
 494
 495         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 496                     len);
 497         os_free(drv->assoc_resp_ies);
 498         drv->assoc_resp_ies = os_malloc(len);
 499         if (drv->assoc_resp_ies == NULL) {
 500                 drv->assoc_resp_ies_len = 0;
 501                 return -1;
 502         }
 503         os_memcpy(drv->assoc_resp_ies, ev, len);
 504         drv->assoc_resp_ies_len = len;
 505
 506         return 0;
 507 }
 508
 509
 510 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 511 {
 512         union wpa_event_data data;
 513
 514         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 515                 return;
 516
 517         os_memset(&data, 0, sizeof(data));
 518         if (drv->assoc_req_ies) {
 519                 data.assoc_info.req_ies = drv->assoc_req_ies;
 520                 drv->assoc_req_ies = NULL;
 521                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 522         }
 523         if (drv->assoc_resp_ies) {
 524                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 525                 drv->assoc_resp_ies = NULL;
 526                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 527         }
 528
 529         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 530
 531         os_free(data.assoc_info.req_ies);
 532         os_free(data.assoc_info.resp_ies);
 533 }
 534
 535
 536 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 537                                            void *ctx, char *data, int len)
 538 {
 539         struct iw_event iwe_buf, *iwe = &iwe_buf;
 540         char *pos, *end, *custom, *buf;
 541
 542         pos = data;
 543         end = data + len;
 544
 545         while (pos + IW_EV_LCP_LEN <= end) {
 546                 /* Event data may be unaligned, so make a local, aligned copy
 547                  * before processing. */
 548                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 549                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 550                            iwe->cmd, iwe->len);
 551                 if (iwe->len <= IW_EV_LCP_LEN)
 552                         return;
 553
 554                 custom = pos + IW_EV_POINT_LEN;
 555                 if (drv->we_version_compiled > 18 &&
 556                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 557                      iwe->cmd == IWEVCUSTOM ||
 558                      iwe->cmd == IWEVASSOCREQIE ||
 559                      iwe->cmd == IWEVASSOCRESPIE ||
 560                      iwe->cmd == IWEVPMKIDCAND)) {
 561                         /* WE-19 removed the pointer from struct iw_point */
 562                         char *dpos = (char *) &iwe_buf.u.data.length;
 563                         int dlen = dpos - (char *) &iwe_buf;
 564                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 565                                   sizeof(struct iw_event) - dlen);
 566                 } else {
 567                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 568                         custom += IW_EV_POINT_OFF;
 569                 }
 570
 571                 switch (iwe->cmd) {
 572                 case SIOCGIWAP:
 573                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 574                                    MACSTR,
 575                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 576                         if (os_memcmp(iwe->u.ap_addr.sa_data,
 577                                       "\x00\x00\x00\x00\x00\x00", ETH_ALEN) ==
 578                             0 ||
 579                             os_memcmp(iwe->u.ap_addr.sa_data,
 580                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 581                             0) {
 582                                 os_free(drv->assoc_req_ies);
 583                                 drv->assoc_req_ies = NULL;
 584                                 os_free(drv->assoc_resp_ies);
 585                                 drv->assoc_resp_ies = NULL;
 586                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 587                                                      NULL);
 588
 589                         } else {
 590                                 wpa_driver_wext_event_assoc_ies(drv);
 591                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 592                         }
 593                         break;
 594                 case IWEVMICHAELMICFAILURE:
 595                         if (custom + iwe->u.data.length > end) {
 596                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 597                                            "IWEVMICHAELMICFAILURE length");
 598                                 return;
 599                         }
 600                         wpa_driver_wext_event_wireless_michaelmicfailure(
 601                                 ctx, custom, iwe->u.data.length);
 602                         break;
 603                 case IWEVCUSTOM:
 604                         if (custom + iwe->u.data.length > end) {
 605                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 606                                            "IWEVCUSTOM length");
 607                                 return;
 608                         }
 609                         buf = os_malloc(iwe->u.data.length + 1);
 610                         if (buf == NULL)
 611                                 return;
 612                         os_memcpy(buf, custom, iwe->u.data.length);
 613                         buf[iwe->u.data.length] = '\0';
 614                         wpa_driver_wext_event_wireless_custom(ctx, buf);
 615                         os_free(buf);
 616                         break;
 617                 case SIOCGIWSCAN:
 618                         drv->scan_complete_events = 1;
 619                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 620                                              drv, ctx);
 621                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 622                         break;
 623                 case IWEVASSOCREQIE:
 624                         if (custom + iwe->u.data.length > end) {
 625                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 626                                            "IWEVASSOCREQIE length");
 627                                 return;
 628                         }
 629                         wpa_driver_wext_event_wireless_assocreqie(
 630                                 drv, custom, iwe->u.data.length);
 631                         break;
 632                 case IWEVASSOCRESPIE:
 633                         if (custom + iwe->u.data.length > end) {
 634                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 635                                            "IWEVASSOCRESPIE length");
 636                                 return;
 637                         }
 638                         wpa_driver_wext_event_wireless_assocrespie(
 639                                 drv, custom, iwe->u.data.length);
 640                         break;
 641                 case IWEVPMKIDCAND:
 642                         if (custom + iwe->u.data.length > end) {
 643                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 644                                            "IWEVPMKIDCAND length");
 645                                 return;
 646                         }
 647                         wpa_driver_wext_event_wireless_pmkidcand(
 648                                 drv, custom, iwe->u.data.length);
 649                         break;
 650                 }
 651
 652                 pos += iwe->len;
 653         }
 654 }
 655
 656
 657 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 658                                        void *ctx, char *buf, size_t len,
 659                                        int del)
 660 {
 661         union wpa_event_data event;
 662
 663         os_memset(&event, 0, sizeof(event));
 664         if (len > sizeof(event.interface_status.ifname))
 665                 len = sizeof(event.interface_status.ifname) - 1;
 666         os_memcpy(event.interface_status.ifname, buf, len);
 667         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 668                 EVENT_INTERFACE_ADDED;
 669
 670         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 671                    del ? "DEL" : "NEW",
 672                    event.interface_status.ifname,
 673                    del ? "removed" : "added");
 674
 675         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 676                 if (del)
 677                         drv->if_removed = 1;
 678                 else
 679                         drv->if_removed = 0;
 680         }
 681
 682         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 683 }
 684
 685
 686 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 687                                       struct nlmsghdr *h)
 688 {
 689         struct ifinfomsg *ifi;
 690         int attrlen, nlmsg_len, rta_len;
 691         struct rtattr *attr;
 692
 693         ifi = NLMSG_DATA(h);
 694
 695         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 696
 697         attrlen = h->nlmsg_len - nlmsg_len;
 698         if (attrlen < 0)
 699                 return 0;
 700
 701         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 702
 703         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 704         while (RTA_OK(attr, attrlen)) {
 705                 if (attr->rta_type == IFLA_IFNAME) {
 706                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 707                             == 0)
 708                                 return 1;
 709                         else
 710                                 break;
 711                 }
 712                 attr = RTA_NEXT(attr, attrlen);
 713         }
 714
 715         return 0;
 716 }
 717
 718
 719 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 720                                        int ifindex, struct nlmsghdr *h)
 721 {
 722         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 723                 return 1;
 724
 725         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, h)) {
 726                 drv->ifindex = if_nametoindex(drv->ifname);
 727                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 728                            "interface");
 729                 wpa_driver_wext_finish_drv_init(drv);
 730                 return 1;
 731         }
 732
 733         return 0;
 734 }
 735
 736
 737 static void wpa_driver_wext_event_rtm_newlink(struct wpa_driver_wext_data *drv,
 738                                               void *ctx, struct nlmsghdr *h,
 739                                               size_t len)
 740 {
 741         struct ifinfomsg *ifi;
 742         int attrlen, nlmsg_len, rta_len;
 743         struct rtattr * attr;
 744
 745         if (len < sizeof(*ifi))
 746                 return;
 747
 748         ifi = NLMSG_DATA(h);
 749
 750         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, h)) {
 751                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 752                            ifi->ifi_index);
 753                 return;
 754         }
 755
 756         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 757                    "(%s%s%s%s)",
 758                    drv->operstate, ifi->ifi_flags,
 759                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 760                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 761                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 762                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 763         /*
 764          * Some drivers send the association event before the operup event--in
 765          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 766          * fails. This will hit us when wpa_supplicant does not need to do
 767          * IEEE 802.1X authentication
 768          */
 769         if (drv->operstate == 1 &&
 770             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 771             !(ifi->ifi_flags & IFF_RUNNING))
 772                 wpa_driver_wext_send_oper_ifla(drv, -1, IF_OPER_UP);
 773
 774         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 775
 776         attrlen = h->nlmsg_len - nlmsg_len;
 777         if (attrlen < 0)
 778                 return;
 779
 780         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 781
 782         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 783         while (RTA_OK(attr, attrlen)) {
 784                 if (attr->rta_type == IFLA_WIRELESS) {
 785                         wpa_driver_wext_event_wireless(
 786                                 drv, ctx, ((char *) attr) + rta_len,
 787                                 attr->rta_len - rta_len);
 788                 } else if (attr->rta_type == IFLA_IFNAME) {
 789                         wpa_driver_wext_event_link(drv, ctx,
 790                                                    ((char *) attr) + rta_len,
 791                                                    attr->rta_len - rta_len, 0);
 792                 }
 793                 attr = RTA_NEXT(attr, attrlen);
 794         }
 795 }
 796
 797
 798 static void wpa_driver_wext_event_rtm_dellink(struct wpa_driver_wext_data *drv,
 799                                               void *ctx, struct nlmsghdr *h,
 800                                               size_t len)
 801 {
 802         struct ifinfomsg *ifi;
 803         int attrlen, nlmsg_len, rta_len;
 804         struct rtattr * attr;
 805
 806         if (len < sizeof(*ifi))
 807                 return;
 808
 809         ifi = NLMSG_DATA(h);
 810
 811         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 812
 813         attrlen = h->nlmsg_len - nlmsg_len;
 814         if (attrlen < 0)
 815                 return;
 816
 817         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 818
 819         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 820         while (RTA_OK(attr, attrlen)) {
 821                 if (attr->rta_type == IFLA_IFNAME) {
 822                         wpa_driver_wext_event_link(drv,  ctx,
 823                                                    ((char *) attr) + rta_len,
 824                                                    attr->rta_len - rta_len, 1);
 825                 }
 826                 attr = RTA_NEXT(attr, attrlen);
 827         }
 828 }
 829
 830
 831 static void wpa_driver_wext_event_receive(int sock, void *eloop_ctx,
 832                                           void *sock_ctx)
 833 {
 834         char buf[8192];
 835         int left;
 836         struct sockaddr_nl from;
 837         socklen_t fromlen;
 838         struct nlmsghdr *h;
 839         int max_events = 10;
 840
 841 try_again:
 842         fromlen = sizeof(from);
 843         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 844                         (struct sockaddr *) &from, &fromlen);
 845         if (left < 0) {
 846                 if (errno != EINTR && errno != EAGAIN)
 847                         perror("recvfrom(netlink)");
 848                 return;
 849         }
 850
 851         h = (struct nlmsghdr *) buf;
 852         while (left >= (int) sizeof(*h)) {
 853                 int len, plen;
 854
 855                 len = h->nlmsg_len;
 856                 plen = len - sizeof(*h);
 857                 if (len > left || plen < 0) {
 858                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 859                                    "len=%d left=%d plen=%d",
 860                                    len, left, plen);
 861                         break;
 862                 }
 863
 864                 switch (h->nlmsg_type) {
 865                 case RTM_NEWLINK:
 866                         wpa_driver_wext_event_rtm_newlink(eloop_ctx, sock_ctx,
 867                                                           h, plen);
 868                         break;
 869                 case RTM_DELLINK:
 870                         wpa_driver_wext_event_rtm_dellink(eloop_ctx, sock_ctx,
 871                                                           h, plen);
 872                         break;
 873                 }
 874
 875                 len = NLMSG_ALIGN(len);
 876                 left -= len;
 877                 h = (struct nlmsghdr *) ((char *) h + len);
 878         }
 879
 880         if (left > 0) {
 881                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 882                            "message", left);
 883         }
 884
 885         if (--max_events > 0) {
 886                 /*
 887                  * Try to receive all events in one eloop call in order to
 888                  * limit race condition on cases where AssocInfo event, Assoc
 889                  * event, and EAPOL frames are received more or less at the
 890                  * same time. We want to process the event messages first
 891                  * before starting EAPOL processing.
 892                  */
 893                 goto try_again;
 894         }
 895 }
 896
 897
 898 static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
 899                                               const char *ifname, int *flags)
 900 {
 901         struct ifreq ifr;
 902
 903         os_memset(&ifr, 0, sizeof(ifr));
 904         os_strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
 905         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 906                 perror("ioctl[SIOCGIFFLAGS]");
 907                 return -1;
 908         }
 909         *flags = ifr.ifr_flags & 0xffff;
 910         return 0;
 911 }
 912
 913
 914 /**
 915  * wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 916  * @drv: driver_wext private data
 917  * @flags: Pointer to returned flags value
 918  * Returns: 0 on success, -1 on failure
 919  */
 920 int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
 921 {
 922         return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
 923 }
 924
 925
 926 static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
 927                                               const char *ifname, int flags)
 928 {
 929         struct ifreq ifr;
 930
 931         os_memset(&ifr, 0, sizeof(ifr));
 932         os_strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
 933         ifr.ifr_flags = flags & 0xffff;
 934         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 935                 perror("SIOCSIFFLAGS");
 936                 return -1;
 937         }
 938         return 0;
 939 }
 940
 941
 942 /**
 943  * wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 944  * @drv: driver_wext private data
 945  * @flags: New value for flags
 946  * Returns: 0 on success, -1 on failure
 947  */
 948 int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
 949 {
 950         return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
 951 }
 952
 953
 954 /**
 955  * wpa_driver_wext_init - Initialize WE driver interface
 956  * @ctx: context to be used when calling wpa_supplicant functions,
 957  * e.g., wpa_supplicant_event()
 958  * @ifname: interface name, e.g., wlan0
 959  * Returns: Pointer to private data, %NULL on failure
 960  */
 961 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 962 {
 963         int s;
 964         struct sockaddr_nl local;
 965         struct wpa_driver_wext_data *drv;
 966
 967         drv = os_zalloc(sizeof(*drv));
 968         if (drv == NULL)
 969                 return NULL;
 970         drv->ctx = ctx;
 971         os_strncpy(drv->ifname, ifname, sizeof(drv->ifname));
 972
 973         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 974         if (drv->ioctl_sock < 0) {
 975                 perror("socket(PF_INET,SOCK_DGRAM)");
 976                 os_free(drv);
 977                 return NULL;
 978         }
 979
 980         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 981         if (s < 0) {
 982                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
 983                 close(drv->ioctl_sock);
 984                 os_free(drv);
 985                 return NULL;
 986         }
 987
 988         os_memset(&local, 0, sizeof(local));
 989         local.nl_family = AF_NETLINK;
 990         local.nl_groups = RTMGRP_LINK;
 991         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
 992                 perror("bind(netlink)");
 993                 close(s);
 994                 close(drv->ioctl_sock);
 995                 os_free(drv);
 996                 return NULL;
 997         }
 998
 999         eloop_register_read_sock(s, wpa_driver_wext_event_receive, drv, ctx);
1000         drv->event_sock = s;
1001
1002         drv->mlme_sock = -1;
1003
1004         wpa_driver_wext_finish_drv_init(drv);
1005
1006         return drv;
1007 }
1008
1009
1010 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
1011 {
1012         int flags;
1013
1014         if (wpa_driver_wext_get_ifflags(drv, &flags) != 0 ||
1015             wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
1016                 printf("Could not set interface '%s' UP\n", drv->ifname);
1017         }
1018 #ifdef ANDROID
1019         os_sleep(0, WPA_DRIVER_WEXT_WAIT_US);
1020 #endif
1021         /*
1022          * Make sure that the driver does not have any obsolete PMKID entries.
1023          */
1024         wpa_driver_wext_flush_pmkid(drv);
1025
1026         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
1027                 printf("Could not configure driver to use managed mode\n");
1028         }
1029
1030         wpa_driver_wext_get_range(drv);
1031
1032         drv->ifindex = if_nametoindex(drv->ifname);
1033
1034         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
1035                 /*
1036                  * Host AP driver may use both wlan# and wifi# interface in
1037                  * wireless events. Since some of the versions included WE-18
1038                  * support, let's add the alternative ifindex also from
1039                  * driver_wext.c for the time being. This may be removed at
1040                  * some point once it is believed that old versions of the
1041                  * driver are not in use anymore.
1042                  */
1043                 char ifname2[IFNAMSIZ + 1];
1044                 os_strncpy(ifname2, drv->ifname, sizeof(ifname2));
1045                 os_memcpy(ifname2, "wifi", 4);
1046                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
1047         }
1048
1049         wpa_driver_wext_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1050 }
1051
1052
1053 /**
1054  * wpa_driver_wext_deinit - Deinitialize WE driver interface
1055  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1056  *
1057  * Shut down driver interface and processing of driver events. Free
1058  * private data buffer if one was allocated in wpa_driver_wext_init().
1059  */
1060 void wpa_driver_wext_deinit(void *priv)
1061 {
1062         struct wpa_driver_wext_data *drv = priv;
1063         int flags;
1064
1065         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1066
1067         /*
1068          * Clear possibly configured driver parameters in order to make it
1069          * easier to use the driver after wpa_supplicant has been terminated.
1070          */
1071         wpa_driver_wext_set_bssid(drv, (u8 *) "\x00\x00\x00\x00\x00\x00");
1072
1073         wpa_driver_wext_send_oper_ifla(priv, 0, IF_OPER_UP);
1074
1075         eloop_unregister_read_sock(drv->event_sock);
1076         if (drv->mlme_sock >= 0)
1077                 eloop_unregister_read_sock(drv->mlme_sock);
1078
1079         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
1080                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
1081
1082 #ifdef CONFIG_CLIENT_MLME
1083         if (drv->mlmedev[0] &&
1084             wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev, &flags) == 0)
1085                 (void) wpa_driver_wext_set_ifflags_ifname(drv, drv->mlmedev,
1086                                                           flags & ~IFF_UP);
1087 #endif /* CONFIG_CLIENT_MLME */
1088
1089         close(drv->event_sock);
1090         close(drv->ioctl_sock);
1091         if (drv->mlme_sock >= 0)
1092                 close(drv->mlme_sock);
1093         os_free(drv->assoc_req_ies);
1094         os_free(drv->assoc_resp_ies);
1095         os_free(drv);
1096 }
1097
1098
1099 /**
1100  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1101  * @eloop_ctx: Unused
1102  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1103  *
1104  * This function can be used as registered timeout when starting a scan to
1105  * generate a scan completed event if the driver does not report this.
1106  */
1107 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1108 {
1109         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1110         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1111 }
1112
1113
1114 /**
1115  * wpa_driver_wext_scan - Request the driver to initiate scan
1116  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1117  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1118  *      all SSIDs (either active scan with broadcast SSID or passive
1119  *      scan
1120  * @ssid_len: Length of the SSID
1121  * Returns: 0 on success, -1 on failure
1122  */
1123 int wpa_driver_wext_scan(void *priv, const u8 *ssid, size_t ssid_len)
1124 {
1125         struct wpa_driver_wext_data *drv = priv;
1126         struct iwreq iwr;
1127         int ret = 0, timeout;
1128         struct iw_scan_req req;
1129
1130         if (ssid_len > IW_ESSID_MAX_SIZE) {
1131                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1132                            __FUNCTION__, (unsigned long) ssid_len);
1133                 return -1;
1134         }
1135
1136         os_memset(&iwr, 0, sizeof(iwr));
1137         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1138
1139         if (ssid && ssid_len) {
1140                 os_memset(&req, 0, sizeof(req));
1141                 req.essid_len = ssid_len;
1142                 req.bssid.sa_family = ARPHRD_ETHER;
1143                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1144                 os_memcpy(req.essid, ssid, ssid_len);
1145                 iwr.u.data.pointer = (caddr_t) &req;
1146                 iwr.u.data.length = sizeof(req);
1147                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1148         }
1149
1150         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1151                 perror("ioctl[SIOCSIWSCAN]");
1152                 ret = -1;
1153         }
1154
1155         /* Not all drivers generate "scan completed" wireless event, so try to
1156          * read results after a timeout. */
1157         timeout = 5;
1158         if (drv->scan_complete_events) {
1159                 /*
1160                  * The driver seems to deliver SIOCGIWSCAN events to notify
1161                  * when scan is complete, so use longer timeout to avoid race
1162                  * conditions with scanning and following association request.
1163                  */
1164                 timeout = 30;
1165         }
1166         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1167                    "seconds", ret, timeout);
1168         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1169         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1170                                drv->ctx);
1171
1172         return ret;
1173 }
1174
1175
1176 /* Compare function for sorting scan results. Return >0 if @b is considered
1177  * better. */
1178 static int wpa_scan_result_compar(const void *a, const void *b)
1179 {
1180         const struct wpa_scan_result *wa = a;
1181         const struct wpa_scan_result *wb = b;
1182
1183         /* WPA/WPA2 support preferred */
1184         if ((wb->wpa_ie_len || wb->rsn_ie_len) &&
1185             !(wa->wpa_ie_len || wa->rsn_ie_len))
1186                 return 1;
1187         if (!(wb->wpa_ie_len || wb->rsn_ie_len) &&
1188             (wa->wpa_ie_len || wa->rsn_ie_len))
1189                 return -1;
1190
1191         /* privacy support preferred */
1192         if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 &&
1193             (wb->caps & IEEE80211_CAP_PRIVACY))
1194                 return 1;
1195         if ((wa->caps & IEEE80211_CAP_PRIVACY) &&
1196             (wb->caps & IEEE80211_CAP_PRIVACY) == 0)
1197                 return -1;
1198
1199         /* best/max rate preferred if signal level close enough XXX */
1200         if (wa->maxrate != wb->maxrate && abs(wb->level - wa->level) < 5)
1201                 return wb->maxrate - wa->maxrate;
1202
1203         /* use freq for channel preference */
1204
1205         /* all things being equal, use signal level; if signal levels are
1206          * identical, use quality values since some drivers may only report
1207          * that value and leave the signal level zero */
1208         if (wb->level == wa->level)
1209                 return wb->qual - wa->qual;
1210         return wb->level - wa->level;
1211 }
1212
1213
1214 /**
1215  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1216  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1217  * @results: Pointer to buffer for scan results
1218  * @max_size: Maximum number of entries (buffer size)
1219  * Returns: Number of scan result entries used on success, -1 on
1220  * failure
1221  *
1222  * If scan results include more than max_size BSSes, max_size will be
1223  * returned and the remaining entries will not be included in the
1224  * buffer.
1225  */
1226 int wpa_driver_wext_get_scan_results(void *priv,
1227                                      struct wpa_scan_result *results,
1228                                      size_t max_size)
1229 {
1230         struct wpa_driver_wext_data *drv = priv;
1231         struct iwreq iwr;
1232         size_t ap_num = 0;
1233         int first, maxrate;
1234         u8 *res_buf;
1235         struct iw_event iwe_buf, *iwe = &iwe_buf;
1236         char *pos, *end, *custom, *genie, *gpos, *gend;
1237         struct iw_param p;
1238         size_t len, clen, res_buf_len;
1239
1240         os_memset(results, 0, max_size * sizeof(struct wpa_scan_result));
1241 #ifdef ANDROID
1242         /* To make sure correctly parse scan results which is impacted by wext
1243          * version, first check range->we_version, if it is default value (0),
1244          * update again here */
1245         if (drv->we_version_compiled == 0)
1246                 wpa_driver_wext_get_range(drv);
1247 #endif
1248         res_buf_len = IW_SCAN_MAX_DATA;
1249         for (;;) {
1250                 res_buf = os_malloc(res_buf_len);
1251                 if (res_buf == NULL)
1252                         return -1;
1253                 os_memset(&iwr, 0, sizeof(iwr));
1254                 os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1255                 iwr.u.data.pointer = res_buf;
1256                 iwr.u.data.length = res_buf_len;
1257
1258                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1259                         break;
1260
1261                 if (errno == E2BIG && res_buf_len < 100000) {
1262                         os_free(res_buf);
1263                         res_buf = NULL;
1264                         res_buf_len *= 2;
1265                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1266                                    "trying larger buffer (%lu bytes)",
1267                                    (unsigned long) res_buf_len);
1268                 } else {
1269                         perror("ioctl[SIOCGIWSCAN]");
1270                         os_free(res_buf);
1271                         return -1;
1272                 }
1273         }
1274
1275         len = iwr.u.data.length;
1276         ap_num = 0;
1277         first = 1;
1278
1279         pos = (char *) res_buf;
1280         end = (char *) res_buf + len;
1281
1282         while (pos + IW_EV_LCP_LEN <= end) {
1283                 int ssid_len;
1284                 /* Event data may be unaligned, so make a local, aligned copy
1285                  * before processing. */
1286                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1287                 if (iwe->len <= IW_EV_LCP_LEN)
1288                         break;
1289
1290                 custom = pos + IW_EV_POINT_LEN;
1291                 if (drv->we_version_compiled > 18 &&
1292                     (iwe->cmd == SIOCGIWESSID ||
1293                      iwe->cmd == SIOCGIWENCODE ||
1294                      iwe->cmd == IWEVGENIE ||
1295                      iwe->cmd == IWEVCUSTOM)) {
1296                         /* WE-19 removed the pointer from struct iw_point */
1297                         char *dpos = (char *) &iwe_buf.u.data.length;
1298                         int dlen = dpos - (char *) &iwe_buf;
1299                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1300                                   sizeof(struct iw_event) - dlen);
1301                 } else {
1302                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1303                         custom += IW_EV_POINT_OFF;
1304                 }
1305
1306                 switch (iwe->cmd) {
1307                 case SIOCGIWAP:
1308                         if (!first)
1309                                 ap_num++;
1310                         first = 0;
1311                         if (ap_num < max_size) {
1312                                 os_memcpy(results[ap_num].bssid,
1313                                           iwe->u.ap_addr.sa_data, ETH_ALEN);
1314                         }
1315                         break;
1316                 case SIOCGIWMODE:
1317                         if (ap_num >= max_size)
1318                                 break;
1319                         if (iwe->u.mode == IW_MODE_ADHOC)
1320                                 results[ap_num].caps |= IEEE80211_CAP_IBSS;
1321                         else if (iwe->u.mode == IW_MODE_MASTER ||
1322                                  iwe->u.mode == IW_MODE_INFRA)
1323                                 results[ap_num].caps |= IEEE80211_CAP_ESS;
1324                         break;
1325                 case SIOCGIWESSID:
1326                         ssid_len = iwe->u.essid.length;
1327                         if (custom + ssid_len > end)
1328                                 break;
1329                         if (iwe->u.essid.flags &&
1330                             ssid_len > 0 &&
1331                             ssid_len <= IW_ESSID_MAX_SIZE) {
1332                                 if (ap_num < max_size) {
1333                                         os_memcpy(results[ap_num].ssid, custom,
1334                                                   ssid_len);
1335                                         results[ap_num].ssid_len = ssid_len;
1336                                 }
1337                         }
1338                         break;
1339                 case SIOCGIWFREQ:
1340                         if (ap_num < max_size) {
1341                                 int divi = 1000000, i;
1342                                 if (iwe->u.freq.e == 0) {
1343                                         /*
1344                                          * Some drivers do not report
1345                                          * frequency, but a channel. Try to map
1346                                          * this to frequency by assuming they
1347                                          * are using IEEE 802.11b/g. But don't
1348                                          * overwrite a previously parsed
1349                                          * frequency if the driver sends both
1350                                          * frequency and channel, since the
1351                                          * driver may be sending an A-band
1352                                          * channel that we don't handle here.
1353                                          */
1354
1355                                         if (results[ap_num].freq)
1356                                                 break;
1357
1358                                         if (iwe->u.freq.m >= 1 &&
1359                                             iwe->u.freq.m <= 13) {
1360                                                 results[ap_num].freq =
1361                                                         2407 +
1362                                                         5 * iwe->u.freq.m;
1363                                                 break;
1364                                         } else if (iwe->u.freq.m == 14) {
1365                                                 results[ap_num].freq = 2484;
1366                                                 break;
1367                                         }
1368                                 }
1369                                 if (iwe->u.freq.e > 6) {
1370                                         wpa_printf(
1371                                                 MSG_DEBUG, "Invalid freq "
1372                                                 "in scan results (BSSID="
1373                                                 MACSTR ": m=%d e=%d\n",
1374                                                 MAC2STR(results[ap_num].bssid),
1375                                                 iwe->u.freq.m, iwe->u.freq.e);
1376                                         break;
1377                                 }
1378                                 for (i = 0; i < iwe->u.freq.e; i++)
1379                                         divi /= 10;
1380                                 results[ap_num].freq = iwe->u.freq.m / divi;
1381                         }
1382                         break;
1383                 case IWEVQUAL:
1384                         if (ap_num < max_size) {
1385                                 results[ap_num].qual = iwe->u.qual.qual;
1386                                 results[ap_num].noise = iwe->u.qual.noise;
1387                                 results[ap_num].level = iwe->u.qual.level;
1388                         }
1389                         break;
1390                 case SIOCGIWENCODE:
1391                         if (ap_num < max_size &&
1392                             !(iwe->u.data.flags & IW_ENCODE_DISABLED))
1393                                 results[ap_num].caps |= IEEE80211_CAP_PRIVACY;
1394                         break;
1395                 case SIOCGIWRATE:
1396                         custom = pos + IW_EV_LCP_LEN;
1397                         clen = iwe->len;
1398                         if (custom + clen > end)
1399                                 break;
1400                         maxrate = 0;
1401                         while (((ssize_t) clen) >=
1402                                (ssize_t) sizeof(struct iw_param)) {
1403                                 /* Note: may be misaligned, make a local,
1404                                  * aligned copy */
1405                                 os_memcpy(&p, custom, sizeof(struct iw_param));
1406                                 if (p.value > maxrate)
1407                                         maxrate = p.value;
1408                                 clen -= sizeof(struct iw_param);
1409                                 custom += sizeof(struct iw_param);
1410                         }
1411                         if (ap_num < max_size)
1412                                 results[ap_num].maxrate = maxrate;
1413                         break;
1414                 case IWEVGENIE:
1415                         if (ap_num >= max_size)
1416                                 break;
1417                         gpos = genie = custom;
1418                         gend = genie + iwe->u.data.length;
1419                         if (gend > end) {
1420                                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1421                                 break;
1422                         }
1423                         while (gpos + 1 < gend &&
1424                                gpos + 2 + (u8) gpos[1] <= gend) {
1425                                 u8 ie = gpos[0], ielen = gpos[1] + 2;
1426                                 if (ielen > SSID_MAX_WPA_IE_LEN) {
1427                                         gpos += ielen;
1428                                         continue;
1429                                 }
1430                                 switch (ie) {
1431                                 case GENERIC_INFO_ELEM:
1432                                         if (ielen < 2 + 4 ||
1433                                             os_memcmp(&gpos[2],
1434                                                       "\x00\x50\xf2\x01", 4) !=
1435                                             0)
1436                                                 break;
1437                                         os_memcpy(results[ap_num].wpa_ie, gpos,
1438                                                   ielen);
1439                                         results[ap_num].wpa_ie_len = ielen;
1440                                         break;
1441                                 case RSN_INFO_ELEM:
1442                                         os_memcpy(results[ap_num].rsn_ie, gpos,
1443                                                   ielen);
1444                                         results[ap_num].rsn_ie_len = ielen;
1445                                         break;
1446                                 }
1447                                 gpos += ielen;
1448                         }
1449                         break;
1450                 case IWEVCUSTOM:
1451                         clen = iwe->u.data.length;
1452                         if (custom + clen > end)
1453                                 break;
1454                         if (clen > 7 &&
1455                             os_strncmp(custom, "wpa_ie=", 7) == 0 &&
1456                             ap_num < max_size) {
1457                                 char *spos;
1458                                 int bytes;
1459                                 spos = custom + 7;
1460                                 bytes = custom + clen - spos;
1461                                 if (bytes & 1)
1462                                         break;
1463                                 bytes /= 2;
1464                                 if (bytes > SSID_MAX_WPA_IE_LEN) {
1465                                         wpa_printf(MSG_INFO, "Too long WPA IE "
1466                                                    "(%d)", bytes);
1467                                         break;
1468                                 }
1469                                 hexstr2bin(spos, results[ap_num].wpa_ie,
1470                                            bytes);
1471                                 results[ap_num].wpa_ie_len = bytes;
1472                         } else if (clen > 7 &&
1473                                    os_strncmp(custom, "rsn_ie=", 7) == 0 &&
1474                                    ap_num < max_size) {
1475                                 char *spos;
1476                                 int bytes;
1477                                 spos = custom + 7;
1478                                 bytes = custom + clen - spos;
1479                                 if (bytes & 1)
1480                                         break;
1481                                 bytes /= 2;
1482                                 if (bytes > SSID_MAX_WPA_IE_LEN) {
1483                                         wpa_printf(MSG_INFO, "Too long RSN IE "
1484                                                    "(%d)", bytes);
1485                                         break;
1486                                 }
1487                                 hexstr2bin(spos, results[ap_num].rsn_ie,
1488                                            bytes);
1489                                 results[ap_num].rsn_ie_len = bytes;
1490                         }
1491                         break;
1492                 }
1493
1494                 pos += iwe->len;
1495         }
1496         os_free(res_buf);
1497         res_buf = NULL;
1498         if (!first)
1499                 ap_num++;
1500         if (ap_num > max_size) {
1501                 wpa_printf(MSG_DEBUG, "Too small scan result buffer - "
1502                            "%lu BSSes but room only for %lu",
1503                            (unsigned long) ap_num,
1504                            (unsigned long) max_size);
1505                 ap_num = max_size;
1506         }
1507         qsort(results, ap_num, sizeof(struct wpa_scan_result),
1508               wpa_scan_result_compar);
1509
1510         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1511                    (unsigned long) len, (unsigned long) ap_num);
1512
1513         return ap_num;
1514 }
1515
1516
1517 static int wpa_driver_wext_get_range(void *priv)
1518 {
1519         struct wpa_driver_wext_data *drv = priv;
1520         struct iw_range *range;
1521         struct iwreq iwr;
1522         int minlen;
1523         size_t buflen;
1524
1525         /*
1526          * Use larger buffer than struct iw_range in order to allow the
1527          * structure to grow in the future.
1528          */
1529         buflen = sizeof(struct iw_range) + 500;
1530         range = os_zalloc(buflen);
1531         if (range == NULL)
1532                 return -1;
1533
1534         os_memset(&iwr, 0, sizeof(iwr));
1535         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1536         iwr.u.data.pointer = (caddr_t) range;
1537         iwr.u.data.length = buflen;
1538
1539         minlen = ((char *) &range->enc_capa) - (char *) range +
1540                 sizeof(range->enc_capa);
1541
1542         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1543                 perror("ioctl[SIOCGIWRANGE]");
1544                 os_free(range);
1545                 return -1;
1546         } else if (iwr.u.data.length >= minlen &&
1547                    range->we_version_compiled >= 18) {
1548                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1549                            "WE(source)=%d enc_capa=0x%x",
1550                            range->we_version_compiled,
1551                            range->we_version_source,
1552                            range->enc_capa);
1553                 drv->has_capability = 1;
1554                 drv->we_version_compiled = range->we_version_compiled;
1555                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1556                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1557                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1558                 }
1559                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1560                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1561                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1562                 }
1563                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1564                         WPA_DRIVER_CAPA_ENC_WEP104;
1565                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1566                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1567                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1568                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1569                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
1570                            drv->capa.key_mgmt, drv->capa.enc);
1571         } else {
1572                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1573                            "assuming WPA is not supported");
1574         }
1575
1576         os_free(range);
1577         return 0;
1578 }
1579
1580
1581 static int wpa_driver_wext_set_wpa(void *priv, int enabled)
1582 {
1583         struct wpa_driver_wext_data *drv = priv;
1584         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1585
1586         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1587                                               enabled);
1588 }
1589
1590
1591 static int wpa_driver_wext_set_key_ext(void *priv, wpa_alg alg,
1592                                        const u8 *addr, int key_idx,
1593                                        int set_tx, const u8 *seq,
1594                                        size_t seq_len,
1595                                        const u8 *key, size_t key_len)
1596 {
1597         struct wpa_driver_wext_data *drv = priv;
1598         struct iwreq iwr;
1599         int ret = 0;
1600         struct iw_encode_ext *ext;
1601
1602         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1603                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1604                            __FUNCTION__, (unsigned long) seq_len);
1605                 return -1;
1606         }
1607
1608         ext = os_zalloc(sizeof(*ext) + key_len);
1609         if (ext == NULL)
1610                 return -1;
1611         os_memset(&iwr, 0, sizeof(iwr));
1612         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1613         iwr.u.encoding.flags = key_idx + 1;
1614         if (alg == WPA_ALG_NONE)
1615                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1616         iwr.u.encoding.pointer = (caddr_t) ext;
1617         iwr.u.encoding.length = sizeof(*ext) + key_len;
1618
1619         if (addr == NULL ||
1620             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1621                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1622         if (set_tx)
1623                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1624
1625         ext->addr.sa_family = ARPHRD_ETHER;
1626         if (addr)
1627                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1628         else
1629                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1630         if (key && key_len) {
1631                 os_memcpy(ext + 1, key, key_len);
1632                 ext->key_len = key_len;
1633         }
1634         switch (alg) {
1635         case WPA_ALG_NONE:
1636                 ext->alg = IW_ENCODE_ALG_NONE;
1637                 break;
1638         case WPA_ALG_WEP:
1639                 ext->alg = IW_ENCODE_ALG_WEP;
1640                 break;
1641         case WPA_ALG_TKIP:
1642                 ext->alg = IW_ENCODE_ALG_TKIP;
1643                 break;
1644         case WPA_ALG_CCMP:
1645                 ext->alg = IW_ENCODE_ALG_CCMP;
1646                 break;
1647         default:
1648                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1649                            __FUNCTION__, alg);
1650                 os_free(ext);
1651                 return -1;
1652         }
1653
1654         if (seq && seq_len) {
1655                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1656                 os_memcpy(ext->rx_seq, seq, seq_len);
1657         }
1658
1659         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1660                 ret = errno == EOPNOTSUPP ? -2 : -1;
1661                 if (errno == ENODEV) {
1662                         /*
1663                          * ndiswrapper seems to be returning incorrect error
1664                          * code.. */
1665                         ret = -2;
1666                 }
1667
1668                 perror("ioctl[SIOCSIWENCODEEXT]");
1669         }
1670
1671         os_free(ext);
1672         return ret;
1673 }
1674
1675
1676 /**
1677  * wpa_driver_wext_set_key - Configure encryption key
1678  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1679  * @priv: Private driver interface data
1680  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1681  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1682  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1683  *      broadcast/default keys
1684  * @key_idx: key index (0..3), usually 0 for unicast keys
1685  * @set_tx: Configure this key as the default Tx key (only used when
1686  *      driver does not support separate unicast/individual key
1687  * @seq: Sequence number/packet number, seq_len octets, the next
1688  *      packet number to be used for in replay protection; configured
1689  *      for Rx keys (in most cases, this is only used with broadcast
1690  *      keys and set to zero for unicast keys)
1691  * @seq_len: Length of the seq, depends on the algorithm:
1692  *      TKIP: 6 octets, CCMP: 6 octets
1693  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1694  *      8-byte Rx Mic Key
1695  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1696  *      TKIP: 32, CCMP: 16)
1697  * Returns: 0 on success, -1 on failure
1698  *
1699  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1700  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1701  */
1702 int wpa_driver_wext_set_key(void *priv, wpa_alg alg,
1703                             const u8 *addr, int key_idx,
1704                             int set_tx, const u8 *seq, size_t seq_len,
1705                             const u8 *key, size_t key_len)
1706 {
1707         struct wpa_driver_wext_data *drv = priv;
1708         struct iwreq iwr;
1709         int ret = 0;
1710
1711         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1712                    "key_len=%lu",
1713                    __FUNCTION__, alg, key_idx, set_tx,
1714                    (unsigned long) seq_len, (unsigned long) key_len);
1715
1716         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1717                                           seq, seq_len, key, key_len);
1718         if (ret == 0)
1719                 return 0;
1720
1721         if (ret == -2 &&
1722             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1723                 wpa_printf(MSG_DEBUG, "Driver did not support "
1724                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1725                 ret = 0;
1726         } else {
1727                 wpa_printf(MSG_DEBUG, "Driver did not support "
1728                            "SIOCSIWENCODEEXT");
1729                 return ret;
1730         }
1731
1732         os_memset(&iwr, 0, sizeof(iwr));
1733         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1734         iwr.u.encoding.flags = key_idx + 1;
1735         if (alg == WPA_ALG_NONE)
1736                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1737         iwr.u.encoding.pointer = (caddr_t) key;
1738         iwr.u.encoding.length = key_len;
1739
1740         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1741                 perror("ioctl[SIOCSIWENCODE]");
1742                 ret = -1;
1743         }
1744
1745         if (set_tx && alg != WPA_ALG_NONE) {
1746                 os_memset(&iwr, 0, sizeof(iwr));
1747                 os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1748                 iwr.u.encoding.flags = key_idx + 1;
1749                 iwr.u.encoding.pointer = (caddr_t) NULL;
1750                 iwr.u.encoding.length = 0;
1751                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1752                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1753                         ret = -1;
1754                 }
1755         }
1756
1757         return ret;
1758 }
1759
1760
1761 static int wpa_driver_wext_set_countermeasures(void *priv,
1762                                                int enabled)
1763 {
1764         struct wpa_driver_wext_data *drv = priv;
1765         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1766         return wpa_driver_wext_set_auth_param(drv,
1767                                               IW_AUTH_TKIP_COUNTERMEASURES,
1768                                               enabled);
1769 }
1770
1771
1772 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1773                                                 int enabled)
1774 {
1775         struct wpa_driver_wext_data *drv = priv;
1776         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1777         drv->use_crypt = enabled;
1778         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1779                                               enabled);
1780 }
1781
1782
1783 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1784                                 const u8 *addr, int cmd, int reason_code)
1785 {
1786         struct iwreq iwr;
1787         struct iw_mlme mlme;
1788         int ret = 0;
1789
1790         os_memset(&iwr, 0, sizeof(iwr));
1791         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1792         os_memset(&mlme, 0, sizeof(mlme));
1793         mlme.cmd = cmd;
1794         mlme.reason_code = reason_code;
1795         mlme.addr.sa_family = ARPHRD_ETHER;
1796         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1797         iwr.u.data.pointer = (caddr_t) &mlme;
1798         iwr.u.data.length = sizeof(mlme);
1799
1800         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1801                 perror("ioctl[SIOCSIWMLME]");
1802                 ret = -1;
1803         }
1804
1805         return ret;
1806 }
1807
1808
1809 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1810                                           int reason_code)
1811 {
1812         struct wpa_driver_wext_data *drv = priv;
1813         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1814         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1815 }
1816
1817
1818 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
1819                                         int reason_code)
1820 {
1821         struct wpa_driver_wext_data *drv = priv;
1822         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1823         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC,
1824                                     reason_code);
1825 }
1826
1827
1828 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
1829                                       size_t ie_len)
1830 {
1831         struct wpa_driver_wext_data *drv = priv;
1832         struct iwreq iwr;
1833         int ret = 0;
1834
1835         os_memset(&iwr, 0, sizeof(iwr));
1836         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1837         iwr.u.data.pointer = (caddr_t) ie;
1838         iwr.u.data.length = ie_len;
1839
1840         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1841                 perror("ioctl[SIOCSIWGENIE]");
1842                 ret = -1;
1843         }
1844
1845         return ret;
1846 }
1847
1848
1849 static int wpa_driver_wext_cipher2wext(int cipher)
1850 {
1851         switch (cipher) {
1852         case CIPHER_NONE:
1853                 return IW_AUTH_CIPHER_NONE;
1854         case CIPHER_WEP40:
1855                 return IW_AUTH_CIPHER_WEP40;
1856         case CIPHER_TKIP:
1857                 return IW_AUTH_CIPHER_TKIP;
1858         case CIPHER_CCMP:
1859                 return IW_AUTH_CIPHER_CCMP;
1860         case CIPHER_WEP104:
1861                 return IW_AUTH_CIPHER_WEP104;
1862         default:
1863                 return 0;
1864         }
1865 }
1866
1867
1868 static int wpa_driver_wext_keymgmt2wext(int keymgmt)
1869 {
1870         switch (keymgmt) {
1871         case KEY_MGMT_802_1X:
1872         case KEY_MGMT_802_1X_NO_WPA:
1873                 return IW_AUTH_KEY_MGMT_802_1X;
1874         case KEY_MGMT_PSK:
1875                 return IW_AUTH_KEY_MGMT_PSK;
1876         default:
1877                 return 0;
1878         }
1879 }
1880
1881
1882 static int
1883 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
1884                                   struct wpa_driver_associate_params *params)
1885 {
1886         struct iwreq iwr;
1887         int ret = 0;
1888
1889         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1890                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1891
1892         os_memset(&iwr, 0, sizeof(iwr));
1893         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1894         /* Just changing mode, not actual keys */
1895         iwr.u.encoding.flags = 0;
1896         iwr.u.encoding.pointer = (caddr_t) NULL;
1897         iwr.u.encoding.length = 0;
1898
1899         /*
1900          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
1901          * different things. Here they are used to indicate Open System vs.
1902          * Shared Key authentication algorithm. However, some drivers may use
1903          * them to select between open/restricted WEP encrypted (open = allow
1904          * both unencrypted and encrypted frames; restricted = only allow
1905          * encrypted frames).
1906          */
1907
1908         if (!drv->use_crypt) {
1909                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1910         } else {
1911                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1912                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
1913                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1914                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
1915         }
1916
1917         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1918                 perror("ioctl[SIOCSIWENCODE]");
1919                 ret = -1;
1920         }
1921
1922         return ret;
1923 }
1924
1925
1926 static int
1927 wpa_driver_wext_associate(void *priv,
1928                           struct wpa_driver_associate_params *params)
1929 {
1930         struct wpa_driver_wext_data *drv = priv;
1931         int ret = 0;
1932         int allow_unencrypted_eapol;
1933         int value, flags;
1934
1935         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1936
1937         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
1938                 if (!(flags & IFF_UP)) {
1939                         wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
1940                 }
1941         }
1942
1943         /*
1944          * If the driver did not support SIOCSIWAUTH, fallback to
1945          * SIOCSIWENCODE here.
1946          */
1947         if (drv->auth_alg_fallback &&
1948             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
1949                 ret = -1;
1950
1951         if (!params->bssid &&
1952             wpa_driver_wext_set_bssid(drv, NULL) < 0)
1953                 ret = -1;
1954
1955         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
1956                 ret = -1;
1957         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
1958          * from configuration, not from here, where only the selected suite is
1959          * available */
1960         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
1961             < 0)
1962                 ret = -1;
1963         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
1964                 value = IW_AUTH_WPA_VERSION_DISABLED;
1965         else if (params->wpa_ie[0] == RSN_INFO_ELEM)
1966                 value = IW_AUTH_WPA_VERSION_WPA2;
1967         else
1968                 value = IW_AUTH_WPA_VERSION_WPA;
1969         if (wpa_driver_wext_set_auth_param(drv,
1970                                            IW_AUTH_WPA_VERSION, value) < 0)
1971                 ret = -1;
1972         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
1973         if (wpa_driver_wext_set_auth_param(drv,
1974                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
1975                 ret = -1;
1976         value = wpa_driver_wext_cipher2wext(params->group_suite);
1977         if (wpa_driver_wext_set_auth_param(drv,
1978                                            IW_AUTH_CIPHER_GROUP, value) < 0)
1979                 ret = -1;
1980         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
1981         if (wpa_driver_wext_set_auth_param(drv,
1982                                            IW_AUTH_KEY_MGMT, value) < 0)
1983                 ret = -1;
1984         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
1985                 params->pairwise_suite != CIPHER_NONE ||
1986                 params->group_suite != CIPHER_NONE ||
1987                 params->wpa_ie_len;
1988         if (wpa_driver_wext_set_auth_param(drv,
1989                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
1990                 ret = -1;
1991
1992         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
1993          * not using WPA. IEEE 802.1X specifies that these frames are not
1994          * encrypted, but WPA encrypts them when pairwise keys are in use. */
1995         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
1996             params->key_mgmt_suite == KEY_MGMT_PSK)
1997                 allow_unencrypted_eapol = 0;
1998         else
1999                 allow_unencrypted_eapol = 1;
2000
2001         if (wpa_driver_wext_set_auth_param(drv,
2002                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2003                                            allow_unencrypted_eapol) < 0)
2004                 ret = -1;
2005         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2006                 ret = -1;
2007         if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2008                 ret = -1;
2009         if (params->bssid &&
2010             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2011                 ret = -1;
2012
2013         return ret;
2014 }
2015
2016
2017 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2018 {
2019         struct wpa_driver_wext_data *drv = priv;
2020         int algs = 0, res;
2021
2022         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2023                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2024         if (auth_alg & AUTH_ALG_SHARED_KEY)
2025                 algs |= IW_AUTH_ALG_SHARED_KEY;
2026         if (auth_alg & AUTH_ALG_LEAP)
2027                 algs |= IW_AUTH_ALG_LEAP;
2028         if (algs == 0) {
2029                 /* at least one algorithm should be set */
2030                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2031         }
2032
2033         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2034                                              algs);
2035         drv->auth_alg_fallback = res == -2;
2036         return res;
2037 }
2038
2039
2040 /**
2041  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2042  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2043  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2044  * Returns: 0 on success, -1 on failure
2045  */
2046 int wpa_driver_wext_set_mode(void *priv, int mode)
2047 {
2048         struct wpa_driver_wext_data *drv = priv;
2049         struct iwreq iwr;
2050         int ret = -1, flags;
2051         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2052
2053         os_memset(&iwr, 0, sizeof(iwr));
2054         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2055         iwr.u.mode = new_mode;
2056         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2057                 ret = 0;
2058                 goto done;
2059         }
2060
2061         if (errno != EBUSY) {
2062                 perror("ioctl[SIOCSIWMODE]");
2063                 goto done;
2064         }
2065
2066         /* mac80211 doesn't allow mode changes while the device is up, so if
2067          * the device isn't in the mode we're about to change to, take device
2068          * down, try to set the mode again, and bring it back up.
2069          */
2070         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2071                 perror("ioctl[SIOCGIWMODE]");
2072                 goto done;
2073         }
2074
2075         if (iwr.u.mode == new_mode) {
2076                 ret = 0;
2077                 goto done;
2078         }
2079
2080         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2081                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2082
2083                 /* Try to set the mode again while the interface is down */
2084                 iwr.u.mode = new_mode;
2085                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2086                         perror("ioctl[SIOCSIWMODE]");
2087                 else
2088                         ret = 0;
2089
2090                 /* Ignore return value of get_ifflags to ensure that the device
2091                  * is always up like it was before this function was called.
2092                  */
2093                 (void) wpa_driver_wext_get_ifflags(drv, &flags);
2094                 (void) wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2095         }
2096
2097 done:
2098         return ret;
2099 }
2100
2101
2102 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2103                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2104 {
2105         struct iwreq iwr;
2106         struct iw_pmksa pmksa;
2107         int ret = 0;
2108
2109         os_memset(&iwr, 0, sizeof(iwr));
2110         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2111         os_memset(&pmksa, 0, sizeof(pmksa));
2112         pmksa.cmd = cmd;
2113         pmksa.bssid.sa_family = ARPHRD_ETHER;
2114         if (bssid)
2115                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2116         if (pmkid)
2117                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2118         iwr.u.data.pointer = (caddr_t) &pmksa;
2119         iwr.u.data.length = sizeof(pmksa);
2120
2121         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2122                 if (errno != EOPNOTSUPP)
2123                         perror("ioctl[SIOCSIWPMKSA]");
2124                 ret = -1;
2125         }
2126
2127         return ret;
2128 }
2129
2130
2131 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2132                                      const u8 *pmkid)
2133 {
2134         struct wpa_driver_wext_data *drv = priv;
2135         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2136 }
2137
2138
2139 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2140                                         const u8 *pmkid)
2141 {
2142         struct wpa_driver_wext_data *drv = priv;
2143         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2144 }
2145
2146
2147 static int wpa_driver_wext_flush_pmkid(void *priv)
2148 {
2149         struct wpa_driver_wext_data *drv = priv;
2150         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2151 }
2152
2153
2154 static int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2155 {
2156         struct wpa_driver_wext_data *drv = priv;
2157         if (!drv->has_capability)
2158                 return -1;
2159         os_memcpy(capa, &drv->capa, sizeof(*capa));
2160         return 0;
2161 }
2162
2163
2164 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2165                                         const char *ifname)
2166 {
2167         if (ifname == NULL) {
2168                 drv->ifindex2 = -1;
2169                 return 0;
2170         }
2171
2172         drv->ifindex2 = if_nametoindex(ifname);
2173         if (drv->ifindex2 <= 0)
2174                 return -1;
2175
2176         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2177                    "wireless events", drv->ifindex2, ifname);
2178
2179         return 0;
2180 }
2181
2182
2183 int wpa_driver_wext_set_operstate(void *priv, int state)
2184 {
2185         struct wpa_driver_wext_data *drv = priv;
2186
2187         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2188                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2189         drv->operstate = state;
2190         return wpa_driver_wext_send_oper_ifla(
2191                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2192 }
2193
2194
2195 #ifdef CONFIG_CLIENT_MLME
2196 static int hostapd_ioctl(struct wpa_driver_wext_data *drv,
2197                          struct prism2_hostapd_param *param, int len)
2198 {
2199         struct iwreq iwr;
2200
2201         os_memset(&iwr, 0, sizeof(iwr));
2202         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2203         iwr.u.data.pointer = (caddr_t) param;
2204         iwr.u.data.length = len;
2205
2206         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
2207                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2208                 return -1;
2209         }
2210
2211         return 0;
2212 }
2213
2214
2215 static struct wpa_hw_modes *
2216 wpa_driver_wext_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2217 {
2218         struct wpa_driver_wext_data *drv = priv;
2219         struct prism2_hostapd_param *param;
2220         u8 *pos, *end;
2221         struct wpa_hw_modes *modes = NULL;
2222         int i;
2223
2224         param = os_zalloc(PRISM2_HOSTAPD_MAX_BUF_SIZE);
2225         if (param == NULL)
2226                 return NULL;
2227         param->cmd = PRISM2_HOSTAPD_GET_HW_FEATURES;
2228
2229         if (hostapd_ioctl(drv, param, PRISM2_HOSTAPD_MAX_BUF_SIZE) < 0) {
2230                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2231                 goto out;
2232         }
2233
2234         *num_modes = param->u.hw_features.num_modes;
2235         *flags = param->u.hw_features.flags;
2236
2237         pos = param->u.hw_features.data;
2238         end = pos + PRISM2_HOSTAPD_MAX_BUF_SIZE -
2239                 (param->u.hw_features.data - (u8 *) param);
2240
2241         modes = os_zalloc(*num_modes * sizeof(struct wpa_hw_modes));
2242         if (modes == NULL)
2243                 goto out;
2244
2245         for (i = 0; i < *num_modes; i++) {
2246                 struct hostapd_ioctl_hw_modes_hdr *hdr;
2247                 struct wpa_hw_modes *feature;
2248                 int clen, rlen;
2249
2250                 hdr = (struct hostapd_ioctl_hw_modes_hdr *) pos;
2251                 pos = (u8 *) (hdr + 1);
2252                 clen = hdr->num_channels * sizeof(struct wpa_channel_data);
2253                 rlen = hdr->num_rates * sizeof(struct wpa_rate_data);
2254
2255                 feature = &modes[i];
2256                 switch (hdr->mode) {
2257                 case MODE_IEEE80211A:
2258                         feature->mode = WPA_MODE_IEEE80211A;
2259                         break;
2260                 case MODE_IEEE80211B:
2261                         feature->mode = WPA_MODE_IEEE80211B;
2262                         break;
2263                 case MODE_IEEE80211G:
2264                         feature->mode = WPA_MODE_IEEE80211G;
2265                         break;
2266                 case MODE_ATHEROS_TURBO:
2267                 case MODE_ATHEROS_TURBOG:
2268                         wpa_printf(MSG_ERROR, "Skip unsupported hw_mode=%d in "
2269                                    "get_hw_features data", hdr->mode);
2270                         pos += clen + rlen;
2271                         continue;
2272                 default:
2273                         wpa_printf(MSG_ERROR, "Unknown hw_mode=%d in "
2274                                    "get_hw_features data", hdr->mode);
2275                         ieee80211_sta_free_hw_features(modes, *num_modes);
2276                         modes = NULL;
2277                         break;
2278                 }
2279                 feature->num_channels = hdr->num_channels;
2280                 feature->num_rates = hdr->num_rates;
2281
2282                 feature->channels = os_malloc(clen);
2283                 feature->rates = os_malloc(rlen);
2284                 if (!feature->channels || !feature->rates ||
2285                     pos + clen + rlen > end) {
2286                         ieee80211_sta_free_hw_features(modes, *num_modes);
2287                         modes = NULL;
2288                         break;
2289                 }
2290
2291                 os_memcpy(feature->channels, pos, clen);
2292                 pos += clen;
2293                 os_memcpy(feature->rates, pos, rlen);
2294                 pos += rlen;
2295         }
2296
2297 out:
2298         os_free(param);
2299         return modes;
2300 }
2301
2302
2303 int wpa_driver_wext_set_channel(void *priv, wpa_hw_mode phymode, int chan,
2304                                 int freq)
2305 {
2306         return wpa_driver_wext_set_freq(priv, freq);
2307 }
2308
2309
2310 static void wpa_driver_wext_mlme_read(int sock, void *eloop_ctx,
2311                                       void *sock_ctx)
2312 {
2313         struct wpa_driver_wext_data *drv = eloop_ctx;
2314         int len;
2315         unsigned char buf[3000];
2316         struct ieee80211_frame_info *fi;
2317         struct ieee80211_rx_status rx_status;
2318
2319         len = recv(sock, buf, sizeof(buf), 0);
2320         if (len < 0) {
2321                 perror("recv[MLME]");
2322                 return;
2323         }
2324
2325         if (len < (int) sizeof(struct ieee80211_frame_info)) {
2326                 wpa_printf(MSG_DEBUG, "WEXT: Too short MLME frame (len=%d)",
2327                            len);
2328                 return;
2329         }
2330
2331         fi = (struct ieee80211_frame_info *) buf;
2332         if (ntohl(fi->version) != IEEE80211_FI_VERSION) {
2333                 wpa_printf(MSG_DEBUG, "WEXT: Invalid MLME frame info version "
2334                            "0x%x", ntohl(fi->version));
2335                 return;
2336         }
2337
2338         os_memset(&rx_status, 0, sizeof(rx_status));
2339         rx_status.ssi = ntohl(fi->ssi_signal);
2340         rx_status.channel = ntohl(fi->channel);
2341
2342         ieee80211_sta_rx(drv->ctx, buf + sizeof(struct ieee80211_frame_info),
2343                          len - sizeof(struct ieee80211_frame_info),
2344                          &rx_status);
2345 }
2346
2347
2348 static int wpa_driver_wext_open_mlme(struct wpa_driver_wext_data *drv)
2349 {
2350         int flags, ifindex, s, *i;
2351         struct sockaddr_ll addr;
2352         struct iwreq iwr;
2353
2354         os_memset(&iwr, 0, sizeof(iwr));
2355         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2356         i = (int *) iwr.u.name;
2357         *i++ = PRISM2_PARAM_USER_SPACE_MLME;
2358         *i++ = 1;
2359
2360         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) {
2361                 wpa_printf(MSG_ERROR, "WEXT: Failed to configure driver to "
2362                            "use user space MLME");
2363                 return -1;
2364         }
2365
2366         ifindex = if_nametoindex(drv->mlmedev);
2367         if (ifindex == 0) {
2368                 wpa_printf(MSG_ERROR, "WEXT: mlmedev='%s' not found",
2369                            drv->mlmedev);
2370                 return -1;
2371         }
2372
2373         if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev, &flags) != 0
2374             || wpa_driver_wext_set_ifflags_ifname(drv, drv->mlmedev,
2375                                                   flags | IFF_UP) != 0) {
2376                 wpa_printf(MSG_ERROR, "WEXT: Could not set interface "
2377                            "'%s' UP", drv->mlmedev);
2378                 return -1;
2379         }
2380
2381         s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2382         if (s < 0) {
2383                 perror("socket[PF_PACKET,SOCK_RAW]");
2384                 return -1;
2385         }
2386
2387         os_memset(&addr, 0, sizeof(addr));
2388         addr.sll_family = AF_PACKET;
2389         addr.sll_ifindex = ifindex;
2390
2391         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
2392                 perror("bind(MLME)");
2393                 return -1;
2394         }
2395
2396         if (eloop_register_read_sock(s, wpa_driver_wext_mlme_read, drv, NULL))
2397         {
2398                 wpa_printf(MSG_ERROR, "WEXT: Could not register MLME read "
2399                            "socket");
2400                 close(s);
2401                 return -1;
2402         }
2403
2404         return s;
2405 }
2406
2407
2408 static int wpa_driver_wext_send_mlme(void *priv, const u8 *data,
2409                                      size_t data_len)
2410 {
2411         struct wpa_driver_wext_data *drv = priv;
2412         int ret;
2413
2414         ret = send(drv->mlme_sock, data, data_len, 0);
2415         if (ret < 0) {
2416                 perror("send[MLME]");
2417                 return -1;
2418         }
2419
2420         return 0;
2421 }
2422
2423
2424 static int wpa_driver_wext_mlme_add_sta(void *priv, const u8 *addr,
2425                                         const u8 *supp_rates,
2426                                         size_t supp_rates_len)
2427 {
2428         struct wpa_driver_wext_data *drv = priv;
2429         struct prism2_hostapd_param param;
2430         size_t len;
2431
2432         os_memset(&param, 0, sizeof(param));
2433         param.cmd = PRISM2_HOSTAPD_ADD_STA;
2434         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2435         len = supp_rates_len;
2436         if (len > sizeof(param.u.add_sta.supp_rates))
2437                 len = sizeof(param.u.add_sta.supp_rates);
2438         os_memcpy(param.u.add_sta.supp_rates, supp_rates, len);
2439         return hostapd_ioctl(drv, &param, sizeof(param));
2440 }
2441
2442
2443 static int wpa_driver_wext_mlme_remove_sta(void *priv, const u8 *addr)
2444 {
2445         struct wpa_driver_wext_data *drv = priv;
2446         struct prism2_hostapd_param param;
2447
2448         os_memset(&param, 0, sizeof(param));
2449         param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
2450         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2451         return hostapd_ioctl(drv, &param, sizeof(param));
2452 }
2453
2454 #endif /* CONFIG_CLIENT_MLME */
2455
2456
2457 static int wpa_driver_wext_set_param(void *priv, const char *param)
2458 {
2459 #ifdef CONFIG_CLIENT_MLME
2460         struct wpa_driver_wext_data *drv = priv;
2461         const char *pos, *pos2;
2462         size_t len;
2463
2464         if (param == NULL)
2465                 return 0;
2466
2467         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2468
2469         pos = os_strstr(param, "mlmedev=");
2470         if (pos) {
2471                 pos += 8;
2472                 pos2 = os_strchr(pos, ' ');
2473                 if (pos2)
2474                         len = pos2 - pos;
2475                 else
2476                         len = os_strlen(pos);
2477                 if (len + 1 > sizeof(drv->mlmedev))
2478                         return -1;
2479                 os_memcpy(drv->mlmedev, pos, len);
2480                 drv->mlmedev[len] = '\0';
2481                 wpa_printf(MSG_DEBUG, "WEXT: Using user space MLME with "
2482                            "mlmedev='%s'", drv->mlmedev);
2483                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2484
2485                 drv->mlme_sock = wpa_driver_wext_open_mlme(drv);
2486                 if (drv->mlme_sock < 0)
2487                         return -1;
2488         }
2489 #endif /* CONFIG_CLIENT_MLME */
2490
2491         return 0;
2492 }
2493
2494
2495 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2496 {
2497         return drv->we_version_compiled;
2498 }
2499
2500 #ifdef ANDROID
2501 static char *wpa_driver_get_country_code(int channels)
2502 {
2503         char *country = "US"; /* WEXT_NUMBER_SCAN_CHANNELS_FCC */
2504
2505         if (channels == WEXT_NUMBER_SCAN_CHANNELS_ETSI)
2506                 country = "EU";
2507         else if( channels == WEXT_NUMBER_SCAN_CHANNELS_MKK1)
2508                 country = "JP";
2509         return country;
2510 }
2511
2512 static int wpa_driver_priv_driver_cmd( void *priv, char *cmd, char *buf, size_t buf_len )
2513 {
2514         struct wpa_driver_wext_data *drv = priv;
2515         struct wpa_supplicant *wpa_s = (struct wpa_supplicant *)(drv->ctx);
2516         struct iwreq iwr;
2517         int ret = 0;
2518
2519         wpa_printf(MSG_DEBUG, "%s %s len = %d", __func__, cmd, buf_len);
2520
2521         if (os_strcasecmp(cmd, "RSSI-APPROX") == 0) {
2522                 os_strncpy(cmd, "RSSI", MAX_DRV_CMD_SIZE);
2523         }
2524         else if( os_strncasecmp(cmd, "SCAN-CHANNELS", 13) == 0 ) {
2525                 int no_of_chan;
2526
2527                 no_of_chan = atoi(cmd + 13);
2528                 os_snprintf(cmd, MAX_DRV_CMD_SIZE, "COUNTRY %s",
2529                         wpa_driver_get_country_code(no_of_chan));
2530         }
2531         os_memset(&iwr, 0, sizeof(iwr));
2532         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2533         os_memcpy(buf, cmd, strlen(cmd) + 1);
2534         iwr.u.data.pointer = buf;
2535         iwr.u.data.length = buf_len;
2536
2537         if ((ret = ioctl(drv->ioctl_sock, SIOCSIWPRIV, &iwr)) < 0) {
2538                 perror("ioctl[SIOCSIWPRIV]");
2539         }
2540
2541         if (ret < 0)
2542                 wpa_printf(MSG_ERROR, "%s failed", __func__);
2543         else {
2544                 ret = 0;
2545                 if ((os_strcasecmp(cmd, "RSSI") == 0) ||
2546                     (os_strcasecmp(cmd, "LINKSPEED") == 0) ||
2547                     (os_strcasecmp(cmd, "MACADDR") == 0)) {
2548                         ret = strlen(buf);
2549                 }
2550 /*              else if (os_strcasecmp(cmd, "START") == 0) {
2551                         os_sleep(0, WPA_DRIVER_WEXT_WAIT_US);
2552                         wpa_msg(drv->ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STARTED");
2553                 }
2554                 else if (os_strcasecmp(cmd, "STOP") == 0) {
2555                         wpa_msg(drv->ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STOPPED");
2556                 }*/
2557                 wpa_printf(MSG_DEBUG, "%s %s len = %d, %d", __func__, buf, ret, strlen(buf));
2558         }
2559         return ret;
2560 }
2561 #endif
2562
2563 const struct wpa_driver_ops wpa_driver_wext_ops = {
2564         .name = "wext",
2565         .desc = "Linux wireless extensions (generic)",
2566         .get_bssid = wpa_driver_wext_get_bssid,
2567         .get_ssid = wpa_driver_wext_get_ssid,
2568         .set_wpa = wpa_driver_wext_set_wpa,
2569         .set_key = wpa_driver_wext_set_key,
2570         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2571         .set_drop_unencrypted = wpa_driver_wext_set_drop_unencrypted,
2572         .scan = wpa_driver_wext_scan,
2573         .get_scan_results = wpa_driver_wext_get_scan_results,
2574         .deauthenticate = wpa_driver_wext_deauthenticate,
2575         .disassociate = wpa_driver_wext_disassociate,
2576         .associate = wpa_driver_wext_associate,
2577         .set_auth_alg = wpa_driver_wext_set_auth_alg,
2578         .init = wpa_driver_wext_init,
2579         .deinit = wpa_driver_wext_deinit,
2580         .set_param = wpa_driver_wext_set_param,
2581         .add_pmkid = wpa_driver_wext_add_pmkid,
2582         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2583         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2584         .get_capa = wpa_driver_wext_get_capa,
2585         .set_operstate = wpa_driver_wext_set_operstate,
2586 #ifdef CONFIG_CLIENT_MLME
2587         .get_hw_feature_data = wpa_driver_wext_get_hw_feature_data,
2588         .set_channel = wpa_driver_wext_set_channel,
2589         .set_ssid = wpa_driver_wext_set_ssid,
2590         .set_bssid = wpa_driver_wext_set_bssid,
2591         .send_mlme = wpa_driver_wext_send_mlme,
2592         .mlme_add_sta = wpa_driver_wext_mlme_add_sta,
2593         .mlme_remove_sta = wpa_driver_wext_mlme_remove_sta,
2594 #endif /* CONFIG_CLIENT_MLME */
2595 #ifdef ANDROID
2596         .driver_cmd = wpa_driver_priv_driver_cmd,
2597 #endif
2598 };