driver_wext.c

   1 /*
   2  * WPA Supplicant - driver interaction with generic Linux Wireless Extensions
   3  * Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements a driver interface for the Linux Wireless Extensions.
  15  * When used with WE-18 or newer, this interface can be used as-is with number
  16  * of drivers. In addition to this, some of the common functions in this file
  17  * can be used by other driver interface implementations that use generic WE
  18  * ioctls, but require private ioctls for some of the functionality.
  19  */
  20
  21 #include "includes.h"
  22 #include <sys/ioctl.h>
  23 #include <net/if_arp.h>
  24
  25 #include "wireless_copy.h"
  26 #include "common.h"
  27 #include "driver.h"
  28 #include "l2_packet.h"
  29 #include "eloop.h"
  30 #include "wpa_supplicant.h"
  31 #include "priv_netlink.h"
  32 #include "driver_wext.h"
  33 #include "wpa.h"
  34
  35 #ifdef CONFIG_CLIENT_MLME
  36 #include <netpacket/packet.h>
  37 #include <hostapd_ioctl.h>
  38 #include <ieee80211_common.h>
  39 /* from net/mac80211.h */
  40 enum {
  41         MODE_IEEE80211A = 0 /* IEEE 802.11a */,
  42         MODE_IEEE80211B = 1 /* IEEE 802.11b only */,
  43         MODE_ATHEROS_TURBO = 2 /* Atheros Turbo mode (2x.11a at 5 GHz) */,
  44         MODE_IEEE80211G = 3 /* IEEE 802.11g (and 802.11b compatibility) */,
  45         MODE_ATHEROS_TURBOG = 4 /* Atheros Turbo mode (2x.11g at 2.4 GHz) */,
  46         NUM_IEEE80211_MODES = 5
  47 };
  48
  49 #include "mlme.h"
  50
  51 #ifndef ETH_P_ALL
  52 #define ETH_P_ALL 0x0003
  53 #endif
  54 #endif /* CONFIG_CLIENT_MLME */
  55
  56
  57 struct wpa_driver_wext_data {
  58         void *ctx;
  59         int event_sock;
  60         int ioctl_sock;
  61         int mlme_sock;
  62         char ifname[IFNAMSIZ + 1];
  63         int ifindex;
  64         int ifindex2;
  65         int if_removed;
  66         u8 *assoc_req_ies;
  67         size_t assoc_req_ies_len;
  68         u8 *assoc_resp_ies;
  69         size_t assoc_resp_ies_len;
  70         struct wpa_driver_capa capa;
  71         int has_capability;
  72         int we_version_compiled;
  73
  74         /* for set_auth_alg fallback */
  75         int use_crypt;
  76         int auth_alg_fallback;
  77
  78         int operstate;
  79
  80         char mlmedev[IFNAMSIZ + 1];
  81
  82         int scan_complete_events;
  83 };
  84
  85
  86 static int wpa_driver_wext_flush_pmkid(void *priv);
  87 static int wpa_driver_wext_get_range(void *priv);
  88 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
  89
  90
  91 static int wpa_driver_wext_send_oper_ifla(struct wpa_driver_wext_data *drv,
  92                                           int linkmode, int operstate)
  93 {
  94         struct {
  95                 struct nlmsghdr hdr;
  96                 struct ifinfomsg ifinfo;
  97                 char opts[16];
  98         } req;
  99         struct rtattr *rta;
 100         static int nl_seq;
 101         ssize_t ret;
 102
 103         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 104         req.hdr.nlmsg_type = RTM_SETLINK;
 105         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 106         req.hdr.nlmsg_seq = ++nl_seq;
 107         req.hdr.nlmsg_pid = 0;
 108
 109         req.ifinfo.ifi_family = AF_UNSPEC;
 110         req.ifinfo.ifi_type = 0;
 111         req.ifinfo.ifi_index = drv->ifindex;
 112         req.ifinfo.ifi_flags = 0;
 113         req.ifinfo.ifi_change = 0;
 114
 115         if (linkmode != -1) {
 116                 rta = (struct rtattr *)
 117                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 118                 rta->rta_type = IFLA_LINKMODE;
 119                 rta->rta_len = RTA_LENGTH(sizeof(char));
 120                 *((char *) RTA_DATA(rta)) = linkmode;
 121                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 122                         RTA_LENGTH(sizeof(char));
 123         }
 124         if (operstate != -1) {
 125                 rta = (struct rtattr *)
 126                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 127                 rta->rta_type = IFLA_OPERSTATE;
 128                 rta->rta_len = RTA_LENGTH(sizeof(char));
 129                 *((char *) RTA_DATA(rta)) = operstate;
 130                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 131                         RTA_LENGTH(sizeof(char));
 132         }
 133
 134         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 135                    linkmode, operstate);
 136
 137         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 138         if (ret < 0) {
 139                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 140                            "%s (assume operstate is not supported)",
 141                            strerror(errno));
 142         }
 143
 144         return ret < 0 ? -1 : 0;
 145 }
 146
 147
 148 static int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
 149                                           int idx, u32 value)
 150 {
 151         struct iwreq iwr;
 152         int ret = 0;
 153
 154         os_memset(&iwr, 0, sizeof(iwr));
 155         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 156         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 157         iwr.u.param.value = value;
 158
 159         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 160                 if (errno != EOPNOTSUPP) {
 161                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 162                                    "value 0x%x) failed: %s)",
 163                                    idx, value, strerror(errno));
 164                 }
 165                 ret = errno == EOPNOTSUPP ? -2 : -1;
 166         }
 167
 168         return ret;
 169 }
 170
 171
 172 /**
 173  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
 174  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 175  * @bssid: Buffer for BSSID
 176  * Returns: 0 on success, -1 on failure
 177  */
 178 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
 179 {
 180         struct wpa_driver_wext_data *drv = priv;
 181         struct iwreq iwr;
 182         int ret = 0;
 183
 184         os_memset(&iwr, 0, sizeof(iwr));
 185         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 186
 187         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 188                 perror("ioctl[SIOCGIWAP]");
 189                 ret = -1;
 190         }
 191         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 192
 193         return ret;
 194 }
 195
 196
 197 /**
 198  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
 199  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 200  * @bssid: BSSID
 201  * Returns: 0 on success, -1 on failure
 202  */
 203 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
 204 {
 205         struct wpa_driver_wext_data *drv = priv;
 206         struct iwreq iwr;
 207         int ret = 0;
 208
 209         os_memset(&iwr, 0, sizeof(iwr));
 210         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 211         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 212         if (bssid)
 213                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 214         else
 215                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 216
 217         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 218                 perror("ioctl[SIOCSIWAP]");
 219                 ret = -1;
 220         }
 221
 222         return ret;
 223 }
 224
 225
 226 /**
 227  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 228  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 229  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 230  * Returns: SSID length on success, -1 on failure
 231  */
 232 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 233 {
 234         struct wpa_driver_wext_data *drv = priv;
 235         struct iwreq iwr;
 236         int ret = 0;
 237
 238         os_memset(&iwr, 0, sizeof(iwr));
 239         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 240         iwr.u.essid.pointer = (caddr_t) ssid;
 241         iwr.u.essid.length = 32;
 242
 243         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 244                 perror("ioctl[SIOCGIWESSID]");
 245                 ret = -1;
 246         } else {
 247                 ret = iwr.u.essid.length;
 248                 if (ret > 32)
 249                         ret = 32;
 250                 /* Some drivers include nul termination in the SSID, so let's
 251                  * remove it here before further processing. WE-21 changes this
 252                  * to explicitly require the length _not_ to include nul
 253                  * termination. */
 254                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 255                     drv->we_version_compiled < 21)
 256                         ret--;
 257         }
 258
 259         return ret;
 260 }
 261
 262
 263 /**
 264  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 265  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 266  * @ssid: SSID
 267  * @ssid_len: Length of SSID (0..32)
 268  * Returns: 0 on success, -1 on failure
 269  */
 270 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 271 {
 272         struct wpa_driver_wext_data *drv = priv;
 273         struct iwreq iwr;
 274         int ret = 0;
 275         char buf[33];
 276
 277         if (ssid_len > 32)
 278                 return -1;
 279
 280         os_memset(&iwr, 0, sizeof(iwr));
 281         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 282         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 283         iwr.u.essid.flags = (ssid_len != 0);
 284         os_memset(buf, 0, sizeof(buf));
 285         os_memcpy(buf, ssid, ssid_len);
 286         iwr.u.essid.pointer = (caddr_t) buf;
 287         if (drv->we_version_compiled < 21) {
 288                 /* For historic reasons, set SSID length to include one extra
 289                  * character, C string nul termination, even though SSID is
 290                  * really an octet string that should not be presented as a C
 291                  * string. Some Linux drivers decrement the length by one and
 292                  * can thus end up missing the last octet of the SSID if the
 293                  * length is not incremented here. WE-21 changes this to
 294                  * explicitly require the length _not_ to include nul
 295                  * termination. */
 296                 if (ssid_len)
 297                         ssid_len++;
 298         }
 299         iwr.u.essid.length = ssid_len;
 300
 301         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 302                 perror("ioctl[SIOCSIWESSID]");
 303                 ret = -1;
 304         }
 305
 306         return ret;
 307 }
 308
 309
 310 /**
 311  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 312  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 313  * @freq: Frequency in MHz
 314  * Returns: 0 on success, -1 on failure
 315  */
 316 int wpa_driver_wext_set_freq(void *priv, int freq)
 317 {
 318         struct wpa_driver_wext_data *drv = priv;
 319         struct iwreq iwr;
 320         int ret = 0;
 321
 322         os_memset(&iwr, 0, sizeof(iwr));
 323         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 324         iwr.u.freq.m = freq * 100000;
 325         iwr.u.freq.e = 1;
 326
 327         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 328                 perror("ioctl[SIOCSIWFREQ]");
 329                 ret = -1;
 330         }
 331
 332         return ret;
 333 }
 334
 335
 336 static void
 337 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 338 {
 339         union wpa_event_data data;
 340
 341         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 342                    custom);
 343
 344         os_memset(&data, 0, sizeof(data));
 345         /* Host AP driver */
 346         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 347                 data.michael_mic_failure.unicast =
 348                         os_strstr(custom, " unicast ") != NULL;
 349                 /* TODO: parse parameters(?) */
 350                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 351         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 352                 char *spos;
 353                 int bytes;
 354
 355                 spos = custom + 17;
 356
 357                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 358                 if (!bytes || (bytes & 1))
 359                         return;
 360                 bytes /= 2;
 361
 362                 data.assoc_info.req_ies = os_malloc(bytes);
 363                 if (data.assoc_info.req_ies == NULL)
 364                         return;
 365
 366                 data.assoc_info.req_ies_len = bytes;
 367                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 368
 369                 spos += bytes * 2;
 370
 371                 data.assoc_info.resp_ies = NULL;
 372                 data.assoc_info.resp_ies_len = 0;
 373
 374                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 375                         spos += 9;
 376
 377                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 378                         if (!bytes || (bytes & 1))
 379                                 goto done;
 380                         bytes /= 2;
 381
 382                         data.assoc_info.resp_ies = os_malloc(bytes);
 383                         if (data.assoc_info.resp_ies == NULL)
 384                                 goto done;
 385
 386                         data.assoc_info.resp_ies_len = bytes;
 387                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 388                 }
 389
 390                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 391
 392         done:
 393                 os_free(data.assoc_info.resp_ies);
 394                 os_free(data.assoc_info.req_ies);
 395 #ifdef CONFIG_PEERKEY
 396         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 397                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 398                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 399                                    "STKSTART.request '%s'", custom + 17);
 400                         return;
 401                 }
 402                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 403 #endif /* CONFIG_PEERKEY */
 404         }
 405 }
 406
 407
 408 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 409         void *ctx, const char *ev, size_t len)
 410 {
 411         const struct iw_michaelmicfailure *mic;
 412         union wpa_event_data data;
 413
 414         if (len < sizeof(*mic))
 415                 return -1;
 416
 417         mic = (const struct iw_michaelmicfailure *) ev;
 418
 419         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 420                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 421                    MAC2STR(mic->src_addr.sa_data));
 422
 423         os_memset(&data, 0, sizeof(data));
 424         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 425         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 426
 427         return 0;
 428 }
 429
 430
 431 static int wpa_driver_wext_event_wireless_pmkidcand(
 432         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 433 {
 434         const struct iw_pmkid_cand *cand;
 435         union wpa_event_data data;
 436         const u8 *addr;
 437
 438         if (len < sizeof(*cand))
 439                 return -1;
 440
 441         cand = (const struct iw_pmkid_cand *) ev;
 442         addr = (const u8 *) cand->bssid.sa_data;
 443
 444         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 445                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 446                    cand->index, MAC2STR(addr));
 447
 448         os_memset(&data, 0, sizeof(data));
 449         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 450         data.pmkid_candidate.index = cand->index;
 451         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 452         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 453
 454         return 0;
 455 }
 456
 457
 458 static int wpa_driver_wext_event_wireless_assocreqie(
 459         struct wpa_driver_wext_data *drv, const char *ev, int len)
 460 {
 461         if (len < 0)
 462                 return -1;
 463
 464         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 465                     len);
 466         os_free(drv->assoc_req_ies);
 467         drv->assoc_req_ies = os_malloc(len);
 468         if (drv->assoc_req_ies == NULL) {
 469                 drv->assoc_req_ies_len = 0;
 470                 return -1;
 471         }
 472         os_memcpy(drv->assoc_req_ies, ev, len);
 473         drv->assoc_req_ies_len = len;
 474
 475         return 0;
 476 }
 477
 478
 479 static int wpa_driver_wext_event_wireless_assocrespie(
 480         struct wpa_driver_wext_data *drv, const char *ev, int len)
 481 {
 482         if (len < 0)
 483                 return -1;
 484
 485         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 486                     len);
 487         os_free(drv->assoc_resp_ies);
 488         drv->assoc_resp_ies = os_malloc(len);
 489         if (drv->assoc_resp_ies == NULL) {
 490                 drv->assoc_resp_ies_len = 0;
 491                 return -1;
 492         }
 493         os_memcpy(drv->assoc_resp_ies, ev, len);
 494         drv->assoc_resp_ies_len = len;
 495
 496         return 0;
 497 }
 498
 499
 500 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 501 {
 502         union wpa_event_data data;
 503
 504         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 505                 return;
 506
 507         os_memset(&data, 0, sizeof(data));
 508         if (drv->assoc_req_ies) {
 509                 data.assoc_info.req_ies = drv->assoc_req_ies;
 510                 drv->assoc_req_ies = NULL;
 511                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 512         }
 513         if (drv->assoc_resp_ies) {
 514                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 515                 drv->assoc_resp_ies = NULL;
 516                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 517         }
 518
 519         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 520
 521         os_free(data.assoc_info.req_ies);
 522         os_free(data.assoc_info.resp_ies);
 523 }
 524
 525
 526 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 527                                            void *ctx, char *data, int len)
 528 {
 529         struct iw_event iwe_buf, *iwe = &iwe_buf;
 530         char *pos, *end, *custom, *buf;
 531
 532         pos = data;
 533         end = data + len;
 534
 535         while (pos + IW_EV_LCP_LEN <= end) {
 536                 /* Event data may be unaligned, so make a local, aligned copy
 537                  * before processing. */
 538                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 539                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 540                            iwe->cmd, iwe->len);
 541                 if (iwe->len <= IW_EV_LCP_LEN)
 542                         return;
 543
 544                 custom = pos + IW_EV_POINT_LEN;
 545                 if (drv->we_version_compiled > 18 &&
 546                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 547                      iwe->cmd == IWEVCUSTOM ||
 548                      iwe->cmd == IWEVASSOCREQIE ||
 549                      iwe->cmd == IWEVASSOCRESPIE ||
 550                      iwe->cmd == IWEVPMKIDCAND)) {
 551                         /* WE-19 removed the pointer from struct iw_point */
 552                         char *dpos = (char *) &iwe_buf.u.data.length;
 553                         int dlen = dpos - (char *) &iwe_buf;
 554                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 555                                   sizeof(struct iw_event) - dlen);
 556                 } else {
 557                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 558                         custom += IW_EV_POINT_OFF;
 559                 }
 560
 561                 switch (iwe->cmd) {
 562                 case SIOCGIWAP:
 563                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 564                                    MACSTR,
 565                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 566                         if (os_memcmp(iwe->u.ap_addr.sa_data,
 567                                       "\x00\x00\x00\x00\x00\x00", ETH_ALEN) ==
 568                             0 ||
 569                             os_memcmp(iwe->u.ap_addr.sa_data,
 570                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 571                             0) {
 572                                 os_free(drv->assoc_req_ies);
 573                                 drv->assoc_req_ies = NULL;
 574                                 os_free(drv->assoc_resp_ies);
 575                                 drv->assoc_resp_ies = NULL;
 576                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 577                                                      NULL);
 578
 579                         } else {
 580                                 wpa_driver_wext_event_assoc_ies(drv);
 581                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 582                         }
 583                         break;
 584                 case IWEVMICHAELMICFAILURE:
 585                         if (custom + iwe->u.data.length > end) {
 586                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 587                                            "IWEVMICHAELMICFAILURE length");
 588                                 return;
 589                         }
 590                         wpa_driver_wext_event_wireless_michaelmicfailure(
 591                                 ctx, custom, iwe->u.data.length);
 592                         break;
 593                 case IWEVCUSTOM:
 594                         if (custom + iwe->u.data.length > end) {
 595                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 596                                            "IWEVCUSTOM length");
 597                                 return;
 598                         }
 599                         buf = os_malloc(iwe->u.data.length + 1);
 600                         if (buf == NULL)
 601                                 return;
 602                         os_memcpy(buf, custom, iwe->u.data.length);
 603                         buf[iwe->u.data.length] = '\0';
 604                         wpa_driver_wext_event_wireless_custom(ctx, buf);
 605                         os_free(buf);
 606                         break;
 607                 case SIOCGIWSCAN:
 608                         drv->scan_complete_events = 1;
 609                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 610                                              drv, ctx);
 611                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 612                         break;
 613                 case IWEVASSOCREQIE:
 614                         if (custom + iwe->u.data.length > end) {
 615                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 616                                            "IWEVASSOCREQIE length");
 617                                 return;
 618                         }
 619                         wpa_driver_wext_event_wireless_assocreqie(
 620                                 drv, custom, iwe->u.data.length);
 621                         break;
 622                 case IWEVASSOCRESPIE:
 623                         if (custom + iwe->u.data.length > end) {
 624                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 625                                            "IWEVASSOCRESPIE length");
 626                                 return;
 627                         }
 628                         wpa_driver_wext_event_wireless_assocrespie(
 629                                 drv, custom, iwe->u.data.length);
 630                         break;
 631                 case IWEVPMKIDCAND:
 632                         if (custom + iwe->u.data.length > end) {
 633                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 634                                            "IWEVPMKIDCAND length");
 635                                 return;
 636                         }
 637                         wpa_driver_wext_event_wireless_pmkidcand(
 638                                 drv, custom, iwe->u.data.length);
 639                         break;
 640                 }
 641
 642                 pos += iwe->len;
 643         }
 644 }
 645
 646
 647 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 648                                        void *ctx, char *buf, size_t len,
 649                                        int del)
 650 {
 651         union wpa_event_data event;
 652
 653         os_memset(&event, 0, sizeof(event));
 654         if (len > sizeof(event.interface_status.ifname))
 655                 len = sizeof(event.interface_status.ifname) - 1;
 656         os_memcpy(event.interface_status.ifname, buf, len);
 657         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 658                 EVENT_INTERFACE_ADDED;
 659
 660         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 661                    del ? "DEL" : "NEW",
 662                    event.interface_status.ifname,
 663                    del ? "removed" : "added");
 664
 665         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 666                 if (del)
 667                         drv->if_removed = 1;
 668                 else
 669                         drv->if_removed = 0;
 670         }
 671
 672         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 673 }
 674
 675
 676 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 677                                       struct nlmsghdr *h)
 678 {
 679         struct ifinfomsg *ifi;
 680         int attrlen, nlmsg_len, rta_len;
 681         struct rtattr *attr;
 682
 683         ifi = NLMSG_DATA(h);
 684
 685         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 686
 687         attrlen = h->nlmsg_len - nlmsg_len;
 688         if (attrlen < 0)
 689                 return 0;
 690
 691         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 692
 693         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 694         while (RTA_OK(attr, attrlen)) {
 695                 if (attr->rta_type == IFLA_IFNAME) {
 696                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 697                             == 0)
 698                                 return 1;
 699                         else
 700                                 break;
 701                 }
 702                 attr = RTA_NEXT(attr, attrlen);
 703         }
 704
 705         return 0;
 706 }
 707
 708
 709 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 710                                        int ifindex, struct nlmsghdr *h)
 711 {
 712         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 713                 return 1;
 714
 715         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, h)) {
 716                 drv->ifindex = if_nametoindex(drv->ifname);
 717                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 718                            "interface");
 719                 wpa_driver_wext_finish_drv_init(drv);
 720                 return 1;
 721         }
 722
 723         return 0;
 724 }
 725
 726
 727 static void wpa_driver_wext_event_rtm_newlink(struct wpa_driver_wext_data *drv,
 728                                               void *ctx, struct nlmsghdr *h,
 729                                               size_t len)
 730 {
 731         struct ifinfomsg *ifi;
 732         int attrlen, nlmsg_len, rta_len;
 733         struct rtattr * attr;
 734
 735         if (len < sizeof(*ifi))
 736                 return;
 737
 738         ifi = NLMSG_DATA(h);
 739
 740         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, h)) {
 741                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 742                            ifi->ifi_index);
 743                 return;
 744         }
 745
 746         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 747                    "(%s%s%s%s)",
 748                    drv->operstate, ifi->ifi_flags,
 749                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 750                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 751                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 752                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 753         /*
 754          * Some drivers send the association event before the operup event--in
 755          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 756          * fails. This will hit us when wpa_supplicant does not need to do
 757          * IEEE 802.1X authentication
 758          */
 759         if (drv->operstate == 1 &&
 760             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 761             !(ifi->ifi_flags & IFF_RUNNING))
 762                 wpa_driver_wext_send_oper_ifla(drv, -1, IF_OPER_UP);
 763
 764         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 765
 766         attrlen = h->nlmsg_len - nlmsg_len;
 767         if (attrlen < 0)
 768                 return;
 769
 770         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 771
 772         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 773         while (RTA_OK(attr, attrlen)) {
 774                 if (attr->rta_type == IFLA_WIRELESS) {
 775                         wpa_driver_wext_event_wireless(
 776                                 drv, ctx, ((char *) attr) + rta_len,
 777                                 attr->rta_len - rta_len);
 778                 } else if (attr->rta_type == IFLA_IFNAME) {
 779                         wpa_driver_wext_event_link(drv, ctx,
 780                                                    ((char *) attr) + rta_len,
 781                                                    attr->rta_len - rta_len, 0);
 782                 }
 783                 attr = RTA_NEXT(attr, attrlen);
 784         }
 785 }
 786
 787
 788 static void wpa_driver_wext_event_rtm_dellink(struct wpa_driver_wext_data *drv,
 789                                               void *ctx, struct nlmsghdr *h,
 790                                               size_t len)
 791 {
 792         struct ifinfomsg *ifi;
 793         int attrlen, nlmsg_len, rta_len;
 794         struct rtattr * attr;
 795
 796         if (len < sizeof(*ifi))
 797                 return;
 798
 799         ifi = NLMSG_DATA(h);
 800
 801         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 802
 803         attrlen = h->nlmsg_len - nlmsg_len;
 804         if (attrlen < 0)
 805                 return;
 806
 807         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 808
 809         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 810         while (RTA_OK(attr, attrlen)) {
 811                 if (attr->rta_type == IFLA_IFNAME) {
 812                         wpa_driver_wext_event_link(drv,  ctx,
 813                                                    ((char *) attr) + rta_len,
 814                                                    attr->rta_len - rta_len, 1);
 815                 }
 816                 attr = RTA_NEXT(attr, attrlen);
 817         }
 818 }
 819
 820
 821 static void wpa_driver_wext_event_receive(int sock, void *eloop_ctx,
 822                                           void *sock_ctx)
 823 {
 824         char buf[8192];
 825         int left;
 826         struct sockaddr_nl from;
 827         socklen_t fromlen;
 828         struct nlmsghdr *h;
 829         int max_events = 10;
 830
 831 try_again:
 832         fromlen = sizeof(from);
 833         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 834                         (struct sockaddr *) &from, &fromlen);
 835         if (left < 0) {
 836                 if (errno != EINTR && errno != EAGAIN)
 837                         perror("recvfrom(netlink)");
 838                 return;
 839         }
 840
 841         h = (struct nlmsghdr *) buf;
 842         while (left >= (int) sizeof(*h)) {
 843                 int len, plen;
 844
 845                 len = h->nlmsg_len;
 846                 plen = len - sizeof(*h);
 847                 if (len > left || plen < 0) {
 848                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 849                                    "len=%d left=%d plen=%d",
 850                                    len, left, plen);
 851                         break;
 852                 }
 853
 854                 switch (h->nlmsg_type) {
 855                 case RTM_NEWLINK:
 856                         wpa_driver_wext_event_rtm_newlink(eloop_ctx, sock_ctx,
 857                                                           h, plen);
 858                         break;
 859                 case RTM_DELLINK:
 860                         wpa_driver_wext_event_rtm_dellink(eloop_ctx, sock_ctx,
 861                                                           h, plen);
 862                         break;
 863                 }
 864
 865                 len = NLMSG_ALIGN(len);
 866                 left -= len;
 867                 h = (struct nlmsghdr *) ((char *) h + len);
 868         }
 869
 870         if (left > 0) {
 871                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 872                            "message", left);
 873         }
 874
 875         if (--max_events > 0) {
 876                 /*
 877                  * Try to receive all events in one eloop call in order to
 878                  * limit race condition on cases where AssocInfo event, Assoc
 879                  * event, and EAPOL frames are received more or less at the
 880                  * same time. We want to process the event messages first
 881                  * before starting EAPOL processing.
 882                  */
 883                 goto try_again;
 884         }
 885 }
 886
 887
 888 static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
 889                                               const char *ifname, int *flags)
 890 {
 891         struct ifreq ifr;
 892
 893         os_memset(&ifr, 0, sizeof(ifr));
 894         os_strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
 895         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 896                 perror("ioctl[SIOCGIFFLAGS]");
 897                 return -1;
 898         }
 899         *flags = ifr.ifr_flags & 0xffff;
 900         return 0;
 901 }
 902
 903
 904 /**
 905  * wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 906  * @drv: driver_wext private data
 907  * @flags: Pointer to returned flags value
 908  * Returns: 0 on success, -1 on failure
 909  */
 910 int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
 911 {
 912         return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
 913 }
 914
 915
 916 static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
 917                                               const char *ifname, int flags)
 918 {
 919         struct ifreq ifr;
 920
 921         os_memset(&ifr, 0, sizeof(ifr));
 922         os_strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
 923         ifr.ifr_flags = flags & 0xffff;
 924         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 925                 perror("SIOCSIFFLAGS");
 926                 return -1;
 927         }
 928         return 0;
 929 }
 930
 931
 932 /**
 933  * wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 934  * @drv: driver_wext private data
 935  * @flags: New value for flags
 936  * Returns: 0 on success, -1 on failure
 937  */
 938 int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
 939 {
 940         return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
 941 }
 942
 943
 944 /**
 945  * wpa_driver_wext_init - Initialize WE driver interface
 946  * @ctx: context to be used when calling wpa_supplicant functions,
 947  * e.g., wpa_supplicant_event()
 948  * @ifname: interface name, e.g., wlan0
 949  * Returns: Pointer to private data, %NULL on failure
 950  */
 951 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 952 {
 953         int s;
 954         struct sockaddr_nl local;
 955         struct wpa_driver_wext_data *drv;
 956
 957         drv = os_zalloc(sizeof(*drv));
 958         if (drv == NULL)
 959                 return NULL;
 960         drv->ctx = ctx;
 961         os_strncpy(drv->ifname, ifname, sizeof(drv->ifname));
 962
 963         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 964         if (drv->ioctl_sock < 0) {
 965                 perror("socket(PF_INET,SOCK_DGRAM)");
 966                 os_free(drv);
 967                 return NULL;
 968         }
 969
 970         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 971         if (s < 0) {
 972                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
 973                 close(drv->ioctl_sock);
 974                 os_free(drv);
 975                 return NULL;
 976         }
 977
 978         os_memset(&local, 0, sizeof(local));
 979         local.nl_family = AF_NETLINK;
 980         local.nl_groups = RTMGRP_LINK;
 981         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
 982                 perror("bind(netlink)");
 983                 close(s);
 984                 close(drv->ioctl_sock);
 985                 os_free(drv);
 986                 return NULL;
 987         }
 988
 989         eloop_register_read_sock(s, wpa_driver_wext_event_receive, drv, ctx);
 990         drv->event_sock = s;
 991
 992         drv->mlme_sock = -1;
 993
 994         wpa_driver_wext_finish_drv_init(drv);
 995
 996         return drv;
 997 }
 998
 999
1000 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
1001 {
1002         int flags;
1003
1004         /*
1005          * Make sure that the driver does not have any obsolete PMKID entries.
1006          */
1007         wpa_driver_wext_flush_pmkid(drv);
1008
1009         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
1010                 printf("Could not configure driver to use managed mode\n");
1011         }
1012
1013         if (wpa_driver_wext_get_ifflags(drv, &flags) != 0 ||
1014             wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
1015                 printf("Could not set interface '%s' UP\n", drv->ifname);
1016         }
1017
1018         wpa_driver_wext_get_range(drv);
1019
1020         drv->ifindex = if_nametoindex(drv->ifname);
1021
1022         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
1023                 /*
1024                  * Host AP driver may use both wlan# and wifi# interface in
1025                  * wireless events. Since some of the versions included WE-18
1026                  * support, let's add the alternative ifindex also from
1027                  * driver_wext.c for the time being. This may be removed at
1028                  * some point once it is believed that old versions of the
1029                  * driver are not in use anymore.
1030                  */
1031                 char ifname2[IFNAMSIZ + 1];
1032                 os_strncpy(ifname2, drv->ifname, sizeof(ifname2));
1033                 os_memcpy(ifname2, "wifi", 4);
1034                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
1035         }
1036
1037         wpa_driver_wext_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1038 }
1039
1040
1041 /**
1042  * wpa_driver_wext_deinit - Deinitialize WE driver interface
1043  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1044  *
1045  * Shut down driver interface and processing of driver events. Free
1046  * private data buffer if one was allocated in wpa_driver_wext_init().
1047  */
1048 void wpa_driver_wext_deinit(void *priv)
1049 {
1050         struct wpa_driver_wext_data *drv = priv;
1051         int flags;
1052
1053         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1054
1055         /*
1056          * Clear possibly configured driver parameters in order to make it
1057          * easier to use the driver after wpa_supplicant has been terminated.
1058          */
1059         wpa_driver_wext_set_bssid(drv, (u8 *) "\x00\x00\x00\x00\x00\x00");
1060
1061         wpa_driver_wext_send_oper_ifla(priv, 0, IF_OPER_UP);
1062
1063         eloop_unregister_read_sock(drv->event_sock);
1064         if (drv->mlme_sock >= 0)
1065                 eloop_unregister_read_sock(drv->mlme_sock);
1066
1067         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
1068                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
1069
1070 #ifdef CONFIG_CLIENT_MLME
1071         if (drv->mlmedev[0] &&
1072             wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev, &flags) == 0)
1073                 (void) wpa_driver_wext_set_ifflags_ifname(drv, drv->mlmedev,
1074                                                           flags & ~IFF_UP);
1075 #endif /* CONFIG_CLIENT_MLME */
1076
1077         close(drv->event_sock);
1078         close(drv->ioctl_sock);
1079         if (drv->mlme_sock >= 0)
1080                 close(drv->mlme_sock);
1081         os_free(drv->assoc_req_ies);
1082         os_free(drv->assoc_resp_ies);
1083         os_free(drv);
1084 }
1085
1086
1087 /**
1088  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1089  * @eloop_ctx: Unused
1090  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1091  *
1092  * This function can be used as registered timeout when starting a scan to
1093  * generate a scan completed event if the driver does not report this.
1094  */
1095 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1096 {
1097         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1098         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1099 }
1100
1101
1102 /**
1103  * wpa_driver_wext_scan - Request the driver to initiate scan
1104  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1105  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1106  *      all SSIDs (either active scan with broadcast SSID or passive
1107  *      scan
1108  * @ssid_len: Length of the SSID
1109  * Returns: 0 on success, -1 on failure
1110  */
1111 int wpa_driver_wext_scan(void *priv, const u8 *ssid, size_t ssid_len)
1112 {
1113         struct wpa_driver_wext_data *drv = priv;
1114         struct iwreq iwr;
1115         int ret = 0, timeout;
1116         struct iw_scan_req req;
1117
1118         if (ssid_len > IW_ESSID_MAX_SIZE) {
1119                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1120                            __FUNCTION__, (unsigned long) ssid_len);
1121                 return -1;
1122         }
1123
1124         os_memset(&iwr, 0, sizeof(iwr));
1125         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1126
1127         if (ssid && ssid_len) {
1128                 os_memset(&req, 0, sizeof(req));
1129                 req.essid_len = ssid_len;
1130                 req.bssid.sa_family = ARPHRD_ETHER;
1131                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1132                 os_memcpy(req.essid, ssid, ssid_len);
1133                 iwr.u.data.pointer = (caddr_t) &req;
1134                 iwr.u.data.length = sizeof(req);
1135                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1136         }
1137
1138         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1139                 perror("ioctl[SIOCSIWSCAN]");
1140                 ret = -1;
1141         }
1142
1143         /* Not all drivers generate "scan completed" wireless event, so try to
1144          * read results after a timeout. */
1145         timeout = 5;
1146         if (drv->scan_complete_events) {
1147                 /*
1148                  * The driver seems to deliver SIOCGIWSCAN events to notify
1149                  * when scan is complete, so use longer timeout to avoid race
1150                  * conditions with scanning and following association request.
1151                  */
1152                 timeout = 30;
1153         }
1154         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1155                    "seconds", ret, timeout);
1156         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1157         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1158                                drv->ctx);
1159
1160         return ret;
1161 }
1162
1163
1164 /* Compare function for sorting scan results. Return >0 if @b is considered
1165  * better. */
1166 static int wpa_scan_result_compar(const void *a, const void *b)
1167 {
1168         const struct wpa_scan_result *wa = a;
1169         const struct wpa_scan_result *wb = b;
1170
1171         /* WPA/WPA2 support preferred */
1172         if ((wb->wpa_ie_len || wb->rsn_ie_len) &&
1173             !(wa->wpa_ie_len || wa->rsn_ie_len))
1174                 return 1;
1175         if (!(wb->wpa_ie_len || wb->rsn_ie_len) &&
1176             (wa->wpa_ie_len || wa->rsn_ie_len))
1177                 return -1;
1178
1179         /* privacy support preferred */
1180         if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 &&
1181             (wb->caps & IEEE80211_CAP_PRIVACY))
1182                 return 1;
1183         if ((wa->caps & IEEE80211_CAP_PRIVACY) &&
1184             (wb->caps & IEEE80211_CAP_PRIVACY) == 0)
1185                 return -1;
1186
1187         /* best/max rate preferred if signal level close enough XXX */
1188         if (wa->maxrate != wb->maxrate && abs(wb->level - wa->level) < 5)
1189                 return wb->maxrate - wa->maxrate;
1190
1191         /* use freq for channel preference */
1192
1193         /* all things being equal, use signal level; if signal levels are
1194          * identical, use quality values since some drivers may only report
1195          * that value and leave the signal level zero */
1196         if (wb->level == wa->level)
1197                 return wb->qual - wa->qual;
1198         return wb->level - wa->level;
1199 }
1200
1201
1202 /**
1203  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1204  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1205  * @results: Pointer to buffer for scan results
1206  * @max_size: Maximum number of entries (buffer size)
1207  * Returns: Number of scan result entries used on success, -1 on
1208  * failure
1209  *
1210  * If scan results include more than max_size BSSes, max_size will be
1211  * returned and the remaining entries will not be included in the
1212  * buffer.
1213  */
1214 int wpa_driver_wext_get_scan_results(void *priv,
1215                                      struct wpa_scan_result *results,
1216                                      size_t max_size)
1217 {
1218         struct wpa_driver_wext_data *drv = priv;
1219         struct iwreq iwr;
1220         size_t ap_num = 0;
1221         int first, maxrate;
1222         u8 *res_buf;
1223         struct iw_event iwe_buf, *iwe = &iwe_buf;
1224         char *pos, *end, *custom, *genie, *gpos, *gend;
1225         struct iw_param p;
1226         size_t len, clen, res_buf_len;
1227
1228         os_memset(results, 0, max_size * sizeof(struct wpa_scan_result));
1229
1230         res_buf_len = IW_SCAN_MAX_DATA;
1231         for (;;) {
1232                 res_buf = os_malloc(res_buf_len);
1233                 if (res_buf == NULL)
1234                         return -1;
1235                 os_memset(&iwr, 0, sizeof(iwr));
1236                 os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1237                 iwr.u.data.pointer = res_buf;
1238                 iwr.u.data.length = res_buf_len;
1239
1240                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1241                         break;
1242
1243                 if (errno == E2BIG && res_buf_len < 100000) {
1244                         os_free(res_buf);
1245                         res_buf = NULL;
1246                         res_buf_len *= 2;
1247                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1248                                    "trying larger buffer (%lu bytes)",
1249                                    (unsigned long) res_buf_len);
1250                 } else {
1251                         perror("ioctl[SIOCGIWSCAN]");
1252                         os_free(res_buf);
1253                         return -1;
1254                 }
1255         }
1256
1257         len = iwr.u.data.length;
1258         ap_num = 0;
1259         first = 1;
1260
1261         pos = (char *) res_buf;
1262         end = (char *) res_buf + len;
1263
1264         while (pos + IW_EV_LCP_LEN <= end) {
1265                 int ssid_len;
1266                 /* Event data may be unaligned, so make a local, aligned copy
1267                  * before processing. */
1268                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1269                 if (iwe->len <= IW_EV_LCP_LEN)
1270                         break;
1271
1272                 custom = pos + IW_EV_POINT_LEN;
1273                 if (drv->we_version_compiled > 18 &&
1274                     (iwe->cmd == SIOCGIWESSID ||
1275                      iwe->cmd == SIOCGIWENCODE ||
1276                      iwe->cmd == IWEVGENIE ||
1277                      iwe->cmd == IWEVCUSTOM)) {
1278                         /* WE-19 removed the pointer from struct iw_point */
1279                         char *dpos = (char *) &iwe_buf.u.data.length;
1280                         int dlen = dpos - (char *) &iwe_buf;
1281                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1282                                   sizeof(struct iw_event) - dlen);
1283                 } else {
1284                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1285                         custom += IW_EV_POINT_OFF;
1286                 }
1287
1288                 switch (iwe->cmd) {
1289                 case SIOCGIWAP:
1290                         if (!first)
1291                                 ap_num++;
1292                         first = 0;
1293                         if (ap_num < max_size) {
1294                                 os_memcpy(results[ap_num].bssid,
1295                                           iwe->u.ap_addr.sa_data, ETH_ALEN);
1296                         }
1297                         break;
1298                 case SIOCGIWMODE:
1299                         if (ap_num >= max_size)
1300                                 break;
1301                         if (iwe->u.mode == IW_MODE_ADHOC)
1302                                 results[ap_num].caps |= IEEE80211_CAP_IBSS;
1303                         else if (iwe->u.mode == IW_MODE_MASTER ||
1304                                  iwe->u.mode == IW_MODE_INFRA)
1305                                 results[ap_num].caps |= IEEE80211_CAP_ESS;
1306                         break;
1307                 case SIOCGIWESSID:
1308                         ssid_len = iwe->u.essid.length;
1309                         if (custom + ssid_len > end)
1310                                 break;
1311                         if (iwe->u.essid.flags &&
1312                             ssid_len > 0 &&
1313                             ssid_len <= IW_ESSID_MAX_SIZE) {
1314                                 if (ap_num < max_size) {
1315                                         os_memcpy(results[ap_num].ssid, custom,
1316                                                   ssid_len);
1317                                         results[ap_num].ssid_len = ssid_len;
1318                                 }
1319                         }
1320                         break;
1321                 case SIOCGIWFREQ:
1322                         if (ap_num < max_size) {
1323                                 int divi = 1000000, i;
1324                                 if (iwe->u.freq.e == 0) {
1325                                         /*
1326                                          * Some drivers do not report
1327                                          * frequency, but a channel. Try to map
1328                                          * this to frequency by assuming they
1329                                          * are using IEEE 802.11b/g. But don't
1330                                          * overwrite a previously parsed
1331                                          * frequency if the driver sends both
1332                                          * frequency and channel, since the
1333                                          * driver may be sending an A-band
1334                                          * channel that we don't handle here.
1335                                          */
1336
1337                                         if (results[ap_num].freq)
1338                                                 break;
1339
1340                                         if (iwe->u.freq.m >= 1 &&
1341                                             iwe->u.freq.m <= 13) {
1342                                                 results[ap_num].freq =
1343                                                         2407 +
1344                                                         5 * iwe->u.freq.m;
1345                                                 break;
1346                                         } else if (iwe->u.freq.m == 14) {
1347                                                 results[ap_num].freq = 2484;
1348                                                 break;
1349                                         }
1350                                 }
1351                                 if (iwe->u.freq.e > 6) {
1352                                         wpa_printf(
1353                                                 MSG_DEBUG, "Invalid freq "
1354                                                 "in scan results (BSSID="
1355                                                 MACSTR ": m=%d e=%d\n",
1356                                                 MAC2STR(results[ap_num].bssid),
1357                                                 iwe->u.freq.m, iwe->u.freq.e);
1358                                         break;
1359                                 }
1360                                 for (i = 0; i < iwe->u.freq.e; i++)
1361                                         divi /= 10;
1362                                 results[ap_num].freq = iwe->u.freq.m / divi;
1363                         }
1364                         break;
1365                 case IWEVQUAL:
1366                         if (ap_num < max_size) {
1367                                 results[ap_num].qual = iwe->u.qual.qual;
1368                                 results[ap_num].noise = iwe->u.qual.noise;
1369                                 results[ap_num].level = iwe->u.qual.level;
1370                         }
1371                         break;
1372                 case SIOCGIWENCODE:
1373                         if (ap_num < max_size &&
1374                             !(iwe->u.data.flags & IW_ENCODE_DISABLED))
1375                                 results[ap_num].caps |= IEEE80211_CAP_PRIVACY;
1376                         break;
1377                 case SIOCGIWRATE:
1378                         custom = pos + IW_EV_LCP_LEN;
1379                         clen = iwe->len;
1380                         if (custom + clen > end)
1381                                 break;
1382                         maxrate = 0;
1383                         while (((ssize_t) clen) >=
1384                                (ssize_t) sizeof(struct iw_param)) {
1385                                 /* Note: may be misaligned, make a local,
1386                                  * aligned copy */
1387                                 os_memcpy(&p, custom, sizeof(struct iw_param));
1388                                 if (p.value > maxrate)
1389                                         maxrate = p.value;
1390                                 clen -= sizeof(struct iw_param);
1391                                 custom += sizeof(struct iw_param);
1392                         }
1393                         if (ap_num < max_size)
1394                                 results[ap_num].maxrate = maxrate;
1395                         break;
1396                 case IWEVGENIE:
1397                         if (ap_num >= max_size)
1398                                 break;
1399                         gpos = genie = custom;
1400                         gend = genie + iwe->u.data.length;
1401                         if (gend > end) {
1402                                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1403                                 break;
1404                         }
1405                         while (gpos + 1 < gend &&
1406                                gpos + 2 + (u8) gpos[1] <= gend) {
1407                                 u8 ie = gpos[0], ielen = gpos[1] + 2;
1408                                 if (ielen > SSID_MAX_WPA_IE_LEN) {
1409                                         gpos += ielen;
1410                                         continue;
1411                                 }
1412                                 switch (ie) {
1413                                 case GENERIC_INFO_ELEM:
1414                                         if (ielen < 2 + 4 ||
1415                                             os_memcmp(&gpos[2],
1416                                                       "\x00\x50\xf2\x01", 4) !=
1417                                             0)
1418                                                 break;
1419                                         os_memcpy(results[ap_num].wpa_ie, gpos,
1420                                                   ielen);
1421                                         results[ap_num].wpa_ie_len = ielen;
1422                                         break;
1423                                 case RSN_INFO_ELEM:
1424                                         os_memcpy(results[ap_num].rsn_ie, gpos,
1425                                                   ielen);
1426                                         results[ap_num].rsn_ie_len = ielen;
1427                                         break;
1428                                 }
1429                                 gpos += ielen;
1430                         }
1431                         break;
1432                 case IWEVCUSTOM:
1433                         clen = iwe->u.data.length;
1434                         if (custom + clen > end)
1435                                 break;
1436                         if (clen > 7 &&
1437                             os_strncmp(custom, "wpa_ie=", 7) == 0 &&
1438                             ap_num < max_size) {
1439                                 char *spos;
1440                                 int bytes;
1441                                 spos = custom + 7;
1442                                 bytes = custom + clen - spos;
1443                                 if (bytes & 1)
1444                                         break;
1445                                 bytes /= 2;
1446                                 if (bytes > SSID_MAX_WPA_IE_LEN) {
1447                                         wpa_printf(MSG_INFO, "Too long WPA IE "
1448                                                    "(%d)", bytes);
1449                                         break;
1450                                 }
1451                                 hexstr2bin(spos, results[ap_num].wpa_ie,
1452                                            bytes);
1453                                 results[ap_num].wpa_ie_len = bytes;
1454                         } else if (clen > 7 &&
1455                                    os_strncmp(custom, "rsn_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 RSN IE "
1466                                                    "(%d)", bytes);
1467                                         break;
1468                                 }
1469                                 hexstr2bin(spos, results[ap_num].rsn_ie,
1470                                            bytes);
1471                                 results[ap_num].rsn_ie_len = bytes;
1472                         }
1473                         break;
1474                 }
1475
1476                 pos += iwe->len;
1477         }
1478         os_free(res_buf);
1479         res_buf = NULL;
1480         if (!first)
1481                 ap_num++;
1482         if (ap_num > max_size) {
1483                 wpa_printf(MSG_DEBUG, "Too small scan result buffer - "
1484                            "%lu BSSes but room only for %lu",
1485                            (unsigned long) ap_num,
1486                            (unsigned long) max_size);
1487                 ap_num = max_size;
1488         }
1489         qsort(results, ap_num, sizeof(struct wpa_scan_result),
1490               wpa_scan_result_compar);
1491
1492         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1493                    (unsigned long) len, (unsigned long) ap_num);
1494
1495         return ap_num;
1496 }
1497
1498
1499 static int wpa_driver_wext_get_range(void *priv)
1500 {
1501         struct wpa_driver_wext_data *drv = priv;
1502         struct iw_range *range;
1503         struct iwreq iwr;
1504         int minlen;
1505         size_t buflen;
1506
1507         /*
1508          * Use larger buffer than struct iw_range in order to allow the
1509          * structure to grow in the future.
1510          */
1511         buflen = sizeof(struct iw_range) + 500;
1512         range = os_zalloc(buflen);
1513         if (range == NULL)
1514                 return -1;
1515
1516         os_memset(&iwr, 0, sizeof(iwr));
1517         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1518         iwr.u.data.pointer = (caddr_t) range;
1519         iwr.u.data.length = buflen;
1520
1521         minlen = ((char *) &range->enc_capa) - (char *) range +
1522                 sizeof(range->enc_capa);
1523
1524         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1525                 perror("ioctl[SIOCGIWRANGE]");
1526                 os_free(range);
1527                 return -1;
1528         } else if (iwr.u.data.length >= minlen &&
1529                    range->we_version_compiled >= 18) {
1530                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1531                            "WE(source)=%d enc_capa=0x%x",
1532                            range->we_version_compiled,
1533                            range->we_version_source,
1534                            range->enc_capa);
1535                 drv->has_capability = 1;
1536                 drv->we_version_compiled = range->we_version_compiled;
1537                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1538                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1539                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1540                 }
1541                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1542                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1543                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1544                 }
1545                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1546                         WPA_DRIVER_CAPA_ENC_WEP104;
1547                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1548                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1549                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1550                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1551                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
1552                            drv->capa.key_mgmt, drv->capa.enc);
1553         } else {
1554                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1555                            "assuming WPA is not supported");
1556         }
1557
1558         os_free(range);
1559         return 0;
1560 }
1561
1562
1563 static int wpa_driver_wext_set_wpa(void *priv, int enabled)
1564 {
1565         struct wpa_driver_wext_data *drv = priv;
1566         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1567
1568         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1569                                               enabled);
1570 }
1571
1572
1573 static int wpa_driver_wext_set_key_ext(void *priv, wpa_alg alg,
1574                                        const u8 *addr, int key_idx,
1575                                        int set_tx, const u8 *seq,
1576                                        size_t seq_len,
1577                                        const u8 *key, size_t key_len)
1578 {
1579         struct wpa_driver_wext_data *drv = priv;
1580         struct iwreq iwr;
1581         int ret = 0;
1582         struct iw_encode_ext *ext;
1583
1584         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1585                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1586                            __FUNCTION__, (unsigned long) seq_len);
1587                 return -1;
1588         }
1589
1590         ext = os_zalloc(sizeof(*ext) + key_len);
1591         if (ext == NULL)
1592                 return -1;
1593         os_memset(&iwr, 0, sizeof(iwr));
1594         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1595         iwr.u.encoding.flags = key_idx + 1;
1596         if (alg == WPA_ALG_NONE)
1597                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1598         iwr.u.encoding.pointer = (caddr_t) ext;
1599         iwr.u.encoding.length = sizeof(*ext) + key_len;
1600
1601         if (addr == NULL ||
1602             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1603                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1604         if (set_tx)
1605                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1606
1607         ext->addr.sa_family = ARPHRD_ETHER;
1608         if (addr)
1609                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1610         else
1611                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1612         if (key && key_len) {
1613                 os_memcpy(ext + 1, key, key_len);
1614                 ext->key_len = key_len;
1615         }
1616         switch (alg) {
1617         case WPA_ALG_NONE:
1618                 ext->alg = IW_ENCODE_ALG_NONE;
1619                 break;
1620         case WPA_ALG_WEP:
1621                 ext->alg = IW_ENCODE_ALG_WEP;
1622                 break;
1623         case WPA_ALG_TKIP:
1624                 ext->alg = IW_ENCODE_ALG_TKIP;
1625                 break;
1626         case WPA_ALG_CCMP:
1627                 ext->alg = IW_ENCODE_ALG_CCMP;
1628                 break;
1629         default:
1630                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1631                            __FUNCTION__, alg);
1632                 os_free(ext);
1633                 return -1;
1634         }
1635
1636         if (seq && seq_len) {
1637                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1638                 os_memcpy(ext->rx_seq, seq, seq_len);
1639         }
1640
1641         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1642                 ret = errno == EOPNOTSUPP ? -2 : -1;
1643                 if (errno == ENODEV) {
1644                         /*
1645                          * ndiswrapper seems to be returning incorrect error
1646                          * code.. */
1647                         ret = -2;
1648                 }
1649
1650                 perror("ioctl[SIOCSIWENCODEEXT]");
1651         }
1652
1653         os_free(ext);
1654         return ret;
1655 }
1656
1657
1658 /**
1659  * wpa_driver_wext_set_key - Configure encryption key
1660  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1661  * @priv: Private driver interface data
1662  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1663  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1664  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1665  *      broadcast/default keys
1666  * @key_idx: key index (0..3), usually 0 for unicast keys
1667  * @set_tx: Configure this key as the default Tx key (only used when
1668  *      driver does not support separate unicast/individual key
1669  * @seq: Sequence number/packet number, seq_len octets, the next
1670  *      packet number to be used for in replay protection; configured
1671  *      for Rx keys (in most cases, this is only used with broadcast
1672  *      keys and set to zero for unicast keys)
1673  * @seq_len: Length of the seq, depends on the algorithm:
1674  *      TKIP: 6 octets, CCMP: 6 octets
1675  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1676  *      8-byte Rx Mic Key
1677  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1678  *      TKIP: 32, CCMP: 16)
1679  * Returns: 0 on success, -1 on failure
1680  *
1681  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1682  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1683  */
1684 int wpa_driver_wext_set_key(void *priv, wpa_alg alg,
1685                             const u8 *addr, int key_idx,
1686                             int set_tx, const u8 *seq, size_t seq_len,
1687                             const u8 *key, size_t key_len)
1688 {
1689         struct wpa_driver_wext_data *drv = priv;
1690         struct iwreq iwr;
1691         int ret = 0;
1692
1693         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1694                    "key_len=%lu",
1695                    __FUNCTION__, alg, key_idx, set_tx,
1696                    (unsigned long) seq_len, (unsigned long) key_len);
1697
1698         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1699                                           seq, seq_len, key, key_len);
1700         if (ret == 0)
1701                 return 0;
1702
1703         if (ret == -2 &&
1704             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1705                 wpa_printf(MSG_DEBUG, "Driver did not support "
1706                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1707                 ret = 0;
1708         } else {
1709                 wpa_printf(MSG_DEBUG, "Driver did not support "
1710                            "SIOCSIWENCODEEXT");
1711                 return ret;
1712         }
1713
1714         os_memset(&iwr, 0, sizeof(iwr));
1715         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1716         iwr.u.encoding.flags = key_idx + 1;
1717         if (alg == WPA_ALG_NONE)
1718                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1719         iwr.u.encoding.pointer = (caddr_t) key;
1720         iwr.u.encoding.length = key_len;
1721
1722         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1723                 perror("ioctl[SIOCSIWENCODE]");
1724                 ret = -1;
1725         }
1726
1727         if (set_tx && alg != WPA_ALG_NONE) {
1728                 os_memset(&iwr, 0, sizeof(iwr));
1729                 os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1730                 iwr.u.encoding.flags = key_idx + 1;
1731                 iwr.u.encoding.pointer = (caddr_t) NULL;
1732                 iwr.u.encoding.length = 0;
1733                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1734                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1735                         ret = -1;
1736                 }
1737         }
1738
1739         return ret;
1740 }
1741
1742
1743 static int wpa_driver_wext_set_countermeasures(void *priv,
1744                                                int enabled)
1745 {
1746         struct wpa_driver_wext_data *drv = priv;
1747         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1748         return wpa_driver_wext_set_auth_param(drv,
1749                                               IW_AUTH_TKIP_COUNTERMEASURES,
1750                                               enabled);
1751 }
1752
1753
1754 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1755                                                 int enabled)
1756 {
1757         struct wpa_driver_wext_data *drv = priv;
1758         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1759         drv->use_crypt = enabled;
1760         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1761                                               enabled);
1762 }
1763
1764
1765 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1766                                 const u8 *addr, int cmd, int reason_code)
1767 {
1768         struct iwreq iwr;
1769         struct iw_mlme mlme;
1770         int ret = 0;
1771
1772         os_memset(&iwr, 0, sizeof(iwr));
1773         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1774         os_memset(&mlme, 0, sizeof(mlme));
1775         mlme.cmd = cmd;
1776         mlme.reason_code = reason_code;
1777         mlme.addr.sa_family = ARPHRD_ETHER;
1778         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1779         iwr.u.data.pointer = (caddr_t) &mlme;
1780         iwr.u.data.length = sizeof(mlme);
1781
1782         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1783                 perror("ioctl[SIOCSIWMLME]");
1784                 ret = -1;
1785         }
1786
1787         return ret;
1788 }
1789
1790
1791 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1792                                           int reason_code)
1793 {
1794         struct wpa_driver_wext_data *drv = priv;
1795         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1796         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1797 }
1798
1799
1800 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
1801                                         int reason_code)
1802 {
1803         struct wpa_driver_wext_data *drv = priv;
1804         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1805         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC,
1806                                     reason_code);
1807 }
1808
1809
1810 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
1811                                       size_t ie_len)
1812 {
1813         struct wpa_driver_wext_data *drv = priv;
1814         struct iwreq iwr;
1815         int ret = 0;
1816
1817         os_memset(&iwr, 0, sizeof(iwr));
1818         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1819         iwr.u.data.pointer = (caddr_t) ie;
1820         iwr.u.data.length = ie_len;
1821
1822         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1823                 perror("ioctl[SIOCSIWGENIE]");
1824                 ret = -1;
1825         }
1826
1827         return ret;
1828 }
1829
1830
1831 static int wpa_driver_wext_cipher2wext(int cipher)
1832 {
1833         switch (cipher) {
1834         case CIPHER_NONE:
1835                 return IW_AUTH_CIPHER_NONE;
1836         case CIPHER_WEP40:
1837                 return IW_AUTH_CIPHER_WEP40;
1838         case CIPHER_TKIP:
1839                 return IW_AUTH_CIPHER_TKIP;
1840         case CIPHER_CCMP:
1841                 return IW_AUTH_CIPHER_CCMP;
1842         case CIPHER_WEP104:
1843                 return IW_AUTH_CIPHER_WEP104;
1844         default:
1845                 return 0;
1846         }
1847 }
1848
1849
1850 static int wpa_driver_wext_keymgmt2wext(int keymgmt)
1851 {
1852         switch (keymgmt) {
1853         case KEY_MGMT_802_1X:
1854         case KEY_MGMT_802_1X_NO_WPA:
1855                 return IW_AUTH_KEY_MGMT_802_1X;
1856         case KEY_MGMT_PSK:
1857                 return IW_AUTH_KEY_MGMT_PSK;
1858         default:
1859                 return 0;
1860         }
1861 }
1862
1863
1864 static int
1865 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
1866                                   struct wpa_driver_associate_params *params)
1867 {
1868         struct iwreq iwr;
1869         int ret = 0;
1870
1871         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1872                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1873
1874         os_memset(&iwr, 0, sizeof(iwr));
1875         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1876         /* Just changing mode, not actual keys */
1877         iwr.u.encoding.flags = 0;
1878         iwr.u.encoding.pointer = (caddr_t) NULL;
1879         iwr.u.encoding.length = 0;
1880
1881         /*
1882          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
1883          * different things. Here they are used to indicate Open System vs.
1884          * Shared Key authentication algorithm. However, some drivers may use
1885          * them to select between open/restricted WEP encrypted (open = allow
1886          * both unencrypted and encrypted frames; restricted = only allow
1887          * encrypted frames).
1888          */
1889
1890         if (!drv->use_crypt) {
1891                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1892         } else {
1893                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1894                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
1895                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1896                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
1897         }
1898
1899         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1900                 perror("ioctl[SIOCSIWENCODE]");
1901                 ret = -1;
1902         }
1903
1904         return ret;
1905 }
1906
1907
1908 static int
1909 wpa_driver_wext_associate(void *priv,
1910                           struct wpa_driver_associate_params *params)
1911 {
1912         struct wpa_driver_wext_data *drv = priv;
1913         int ret = 0;
1914         int allow_unencrypted_eapol;
1915         int value;
1916
1917         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1918
1919         /*
1920          * If the driver did not support SIOCSIWAUTH, fallback to
1921          * SIOCSIWENCODE here.
1922          */
1923         if (drv->auth_alg_fallback &&
1924             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
1925                 ret = -1;
1926
1927         if (!params->bssid &&
1928             wpa_driver_wext_set_bssid(drv, NULL) < 0)
1929                 ret = -1;
1930
1931         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
1932                 ret = -1;
1933         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
1934          * from configuration, not from here, where only the selected suite is
1935          * available */
1936         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
1937             < 0)
1938                 ret = -1;
1939         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
1940                 value = IW_AUTH_WPA_VERSION_DISABLED;
1941         else if (params->wpa_ie[0] == RSN_INFO_ELEM)
1942                 value = IW_AUTH_WPA_VERSION_WPA2;
1943         else
1944                 value = IW_AUTH_WPA_VERSION_WPA;
1945         if (wpa_driver_wext_set_auth_param(drv,
1946                                            IW_AUTH_WPA_VERSION, value) < 0)
1947                 ret = -1;
1948         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
1949         if (wpa_driver_wext_set_auth_param(drv,
1950                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
1951                 ret = -1;
1952         value = wpa_driver_wext_cipher2wext(params->group_suite);
1953         if (wpa_driver_wext_set_auth_param(drv,
1954                                            IW_AUTH_CIPHER_GROUP, value) < 0)
1955                 ret = -1;
1956         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
1957         if (wpa_driver_wext_set_auth_param(drv,
1958                                            IW_AUTH_KEY_MGMT, value) < 0)
1959                 ret = -1;
1960         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
1961                 params->pairwise_suite != CIPHER_NONE ||
1962                 params->group_suite != CIPHER_NONE ||
1963                 params->wpa_ie_len;
1964         if (wpa_driver_wext_set_auth_param(drv,
1965                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
1966                 ret = -1;
1967
1968         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
1969          * not using WPA. IEEE 802.1X specifies that these frames are not
1970          * encrypted, but WPA encrypts them when pairwise keys are in use. */
1971         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
1972             params->key_mgmt_suite == KEY_MGMT_PSK)
1973                 allow_unencrypted_eapol = 0;
1974         else
1975                 allow_unencrypted_eapol = 1;
1976
1977         if (wpa_driver_wext_set_auth_param(drv,
1978                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
1979                                            allow_unencrypted_eapol) < 0)
1980                 ret = -1;
1981         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
1982                 ret = -1;
1983         if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
1984                 ret = -1;
1985         if (params->bssid &&
1986             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
1987                 ret = -1;
1988
1989         return ret;
1990 }
1991
1992
1993 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
1994 {
1995         struct wpa_driver_wext_data *drv = priv;
1996         int algs = 0, res;
1997
1998         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
1999                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2000         if (auth_alg & AUTH_ALG_SHARED_KEY)
2001                 algs |= IW_AUTH_ALG_SHARED_KEY;
2002         if (auth_alg & AUTH_ALG_LEAP)
2003                 algs |= IW_AUTH_ALG_LEAP;
2004         if (algs == 0) {
2005                 /* at least one algorithm should be set */
2006                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2007         }
2008
2009         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2010                                              algs);
2011         drv->auth_alg_fallback = res == -2;
2012         return res;
2013 }
2014
2015
2016 /**
2017  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2018  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2019  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2020  * Returns: 0 on success, -1 on failure
2021  */
2022 int wpa_driver_wext_set_mode(void *priv, int mode)
2023 {
2024         struct wpa_driver_wext_data *drv = priv;
2025         struct iwreq iwr;
2026         int ret = -1, flags;
2027         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2028
2029         os_memset(&iwr, 0, sizeof(iwr));
2030         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2031         iwr.u.mode = new_mode;
2032         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2033                 ret = 0;
2034                 goto done;
2035         }
2036
2037         if (errno != EBUSY) {
2038                 perror("ioctl[SIOCSIWMODE]");
2039                 goto done;
2040         }
2041
2042         /* mac80211 doesn't allow mode changes while the device is up, so if
2043          * the device isn't in the mode we're about to change to, take device
2044          * down, try to set the mode again, and bring it back up.
2045          */
2046         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2047                 perror("ioctl[SIOCGIWMODE]");
2048                 goto done;
2049         }
2050
2051         if (iwr.u.mode == new_mode) {
2052                 ret = 0;
2053                 goto done;
2054         }
2055
2056         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2057                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2058
2059                 /* Try to set the mode again while the interface is down */
2060                 iwr.u.mode = new_mode;
2061                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2062                         perror("ioctl[SIOCSIWMODE]");
2063                 else
2064                         ret = 0;
2065
2066                 /* Ignore return value of get_ifflags to ensure that the device
2067                  * is always up like it was before this function was called.
2068                  */
2069                 (void) wpa_driver_wext_get_ifflags(drv, &flags);
2070                 (void) wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2071         }
2072
2073 done:
2074         return ret;
2075 }
2076
2077
2078 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2079                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2080 {
2081         struct iwreq iwr;
2082         struct iw_pmksa pmksa;
2083         int ret = 0;
2084
2085         os_memset(&iwr, 0, sizeof(iwr));
2086         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2087         os_memset(&pmksa, 0, sizeof(pmksa));
2088         pmksa.cmd = cmd;
2089         pmksa.bssid.sa_family = ARPHRD_ETHER;
2090         if (bssid)
2091                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2092         if (pmkid)
2093                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2094         iwr.u.data.pointer = (caddr_t) &pmksa;
2095         iwr.u.data.length = sizeof(pmksa);
2096
2097         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2098                 if (errno != EOPNOTSUPP)
2099                         perror("ioctl[SIOCSIWPMKSA]");
2100                 ret = -1;
2101         }
2102
2103         return ret;
2104 }
2105
2106
2107 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2108                                      const u8 *pmkid)
2109 {
2110         struct wpa_driver_wext_data *drv = priv;
2111         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2112 }
2113
2114
2115 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2116                                         const u8 *pmkid)
2117 {
2118         struct wpa_driver_wext_data *drv = priv;
2119         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2120 }
2121
2122
2123 static int wpa_driver_wext_flush_pmkid(void *priv)
2124 {
2125         struct wpa_driver_wext_data *drv = priv;
2126         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2127 }
2128
2129
2130 static int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2131 {
2132         struct wpa_driver_wext_data *drv = priv;
2133         if (!drv->has_capability)
2134                 return -1;
2135         os_memcpy(capa, &drv->capa, sizeof(*capa));
2136         return 0;
2137 }
2138
2139
2140 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2141                                         const char *ifname)
2142 {
2143         if (ifname == NULL) {
2144                 drv->ifindex2 = -1;
2145                 return 0;
2146         }
2147
2148         drv->ifindex2 = if_nametoindex(ifname);
2149         if (drv->ifindex2 <= 0)
2150                 return -1;
2151
2152         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2153                    "wireless events", drv->ifindex2, ifname);
2154
2155         return 0;
2156 }
2157
2158
2159 int wpa_driver_wext_set_operstate(void *priv, int state)
2160 {
2161         struct wpa_driver_wext_data *drv = priv;
2162
2163         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2164                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2165         drv->operstate = state;
2166         return wpa_driver_wext_send_oper_ifla(
2167                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2168 }
2169
2170
2171 #ifdef CONFIG_CLIENT_MLME
2172 static int hostapd_ioctl(struct wpa_driver_wext_data *drv,
2173                          struct prism2_hostapd_param *param, int len)
2174 {
2175         struct iwreq iwr;
2176
2177         os_memset(&iwr, 0, sizeof(iwr));
2178         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2179         iwr.u.data.pointer = (caddr_t) param;
2180         iwr.u.data.length = len;
2181
2182         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
2183                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2184                 return -1;
2185         }
2186
2187         return 0;
2188 }
2189
2190
2191 static struct wpa_hw_modes *
2192 wpa_driver_wext_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2193 {
2194         struct wpa_driver_wext_data *drv = priv;
2195         struct prism2_hostapd_param *param;
2196         u8 *pos, *end;
2197         struct wpa_hw_modes *modes = NULL;
2198         int i;
2199
2200         param = os_zalloc(PRISM2_HOSTAPD_MAX_BUF_SIZE);
2201         if (param == NULL)
2202                 return NULL;
2203         param->cmd = PRISM2_HOSTAPD_GET_HW_FEATURES;
2204
2205         if (hostapd_ioctl(drv, param, PRISM2_HOSTAPD_MAX_BUF_SIZE) < 0) {
2206                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2207                 goto out;
2208         }
2209
2210         *num_modes = param->u.hw_features.num_modes;
2211         *flags = param->u.hw_features.flags;
2212
2213         pos = param->u.hw_features.data;
2214         end = pos + PRISM2_HOSTAPD_MAX_BUF_SIZE -
2215                 (param->u.hw_features.data - (u8 *) param);
2216
2217         modes = os_zalloc(*num_modes * sizeof(struct wpa_hw_modes));
2218         if (modes == NULL)
2219                 goto out;
2220
2221         for (i = 0; i < *num_modes; i++) {
2222                 struct hostapd_ioctl_hw_modes_hdr *hdr;
2223                 struct wpa_hw_modes *feature;
2224                 int clen, rlen;
2225
2226                 hdr = (struct hostapd_ioctl_hw_modes_hdr *) pos;
2227                 pos = (u8 *) (hdr + 1);
2228                 clen = hdr->num_channels * sizeof(struct wpa_channel_data);
2229                 rlen = hdr->num_rates * sizeof(struct wpa_rate_data);
2230
2231                 feature = &modes[i];
2232                 switch (hdr->mode) {
2233                 case MODE_IEEE80211A:
2234                         feature->mode = WPA_MODE_IEEE80211A;
2235                         break;
2236                 case MODE_IEEE80211B:
2237                         feature->mode = WPA_MODE_IEEE80211B;
2238                         break;
2239                 case MODE_IEEE80211G:
2240                         feature->mode = WPA_MODE_IEEE80211G;
2241                         break;
2242                 case MODE_ATHEROS_TURBO:
2243                 case MODE_ATHEROS_TURBOG:
2244                         wpa_printf(MSG_ERROR, "Skip unsupported hw_mode=%d in "
2245                                    "get_hw_features data", hdr->mode);
2246                         pos += clen + rlen;
2247                         continue;
2248                 default:
2249                         wpa_printf(MSG_ERROR, "Unknown hw_mode=%d in "
2250                                    "get_hw_features data", hdr->mode);
2251                         ieee80211_sta_free_hw_features(modes, *num_modes);
2252                         modes = NULL;
2253                         break;
2254                 }
2255                 feature->num_channels = hdr->num_channels;
2256                 feature->num_rates = hdr->num_rates;
2257
2258                 feature->channels = os_malloc(clen);
2259                 feature->rates = os_malloc(rlen);
2260                 if (!feature->channels || !feature->rates ||
2261                     pos + clen + rlen > end) {
2262                         ieee80211_sta_free_hw_features(modes, *num_modes);
2263                         modes = NULL;
2264                         break;
2265                 }
2266
2267                 os_memcpy(feature->channels, pos, clen);
2268                 pos += clen;
2269                 os_memcpy(feature->rates, pos, rlen);
2270                 pos += rlen;
2271         }
2272
2273 out:
2274         os_free(param);
2275         return modes;
2276 }
2277
2278
2279 int wpa_driver_wext_set_channel(void *priv, wpa_hw_mode phymode, int chan,
2280                                 int freq)
2281 {
2282         return wpa_driver_wext_set_freq(priv, freq);
2283 }
2284
2285
2286 static void wpa_driver_wext_mlme_read(int sock, void *eloop_ctx,
2287                                       void *sock_ctx)
2288 {
2289         struct wpa_driver_wext_data *drv = eloop_ctx;
2290         int len;
2291         unsigned char buf[3000];
2292         struct ieee80211_frame_info *fi;
2293         struct ieee80211_rx_status rx_status;
2294
2295         len = recv(sock, buf, sizeof(buf), 0);
2296         if (len < 0) {
2297                 perror("recv[MLME]");
2298                 return;
2299         }
2300
2301         if (len < (int) sizeof(struct ieee80211_frame_info)) {
2302                 wpa_printf(MSG_DEBUG, "WEXT: Too short MLME frame (len=%d)",
2303                            len);
2304                 return;
2305         }
2306
2307         fi = (struct ieee80211_frame_info *) buf;
2308         if (ntohl(fi->version) != IEEE80211_FI_VERSION) {
2309                 wpa_printf(MSG_DEBUG, "WEXT: Invalid MLME frame info version "
2310                            "0x%x", ntohl(fi->version));
2311                 return;
2312         }
2313
2314         os_memset(&rx_status, 0, sizeof(rx_status));
2315         rx_status.ssi = ntohl(fi->ssi_signal);
2316         rx_status.channel = ntohl(fi->channel);
2317
2318         ieee80211_sta_rx(drv->ctx, buf + sizeof(struct ieee80211_frame_info),
2319                          len - sizeof(struct ieee80211_frame_info),
2320                          &rx_status);
2321 }
2322
2323
2324 static int wpa_driver_wext_open_mlme(struct wpa_driver_wext_data *drv)
2325 {
2326         int flags, ifindex, s, *i;
2327         struct sockaddr_ll addr;
2328         struct iwreq iwr;
2329
2330         os_memset(&iwr, 0, sizeof(iwr));
2331         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2332         i = (int *) iwr.u.name;
2333         *i++ = PRISM2_PARAM_USER_SPACE_MLME;
2334         *i++ = 1;
2335
2336         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) {
2337                 wpa_printf(MSG_ERROR, "WEXT: Failed to configure driver to "
2338                            "use user space MLME");
2339                 return -1;
2340         }
2341
2342         ifindex = if_nametoindex(drv->mlmedev);
2343         if (ifindex == 0) {
2344                 wpa_printf(MSG_ERROR, "WEXT: mlmedev='%s' not found",
2345                            drv->mlmedev);
2346                 return -1;
2347         }
2348
2349         if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev, &flags) != 0
2350             || wpa_driver_wext_set_ifflags_ifname(drv, drv->mlmedev,
2351                                                   flags | IFF_UP) != 0) {
2352                 wpa_printf(MSG_ERROR, "WEXT: Could not set interface "
2353                            "'%s' UP", drv->mlmedev);
2354                 return -1;
2355         }
2356
2357         s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2358         if (s < 0) {
2359                 perror("socket[PF_PACKET,SOCK_RAW]");
2360                 return -1;
2361         }
2362
2363         os_memset(&addr, 0, sizeof(addr));
2364         addr.sll_family = AF_PACKET;
2365         addr.sll_ifindex = ifindex;
2366
2367         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
2368                 perror("bind(MLME)");
2369                 return -1;
2370         }
2371
2372         if (eloop_register_read_sock(s, wpa_driver_wext_mlme_read, drv, NULL))
2373         {
2374                 wpa_printf(MSG_ERROR, "WEXT: Could not register MLME read "
2375                            "socket");
2376                 close(s);
2377                 return -1;
2378         }
2379
2380         return s;
2381 }
2382
2383
2384 static int wpa_driver_wext_send_mlme(void *priv, const u8 *data,
2385                                      size_t data_len)
2386 {
2387         struct wpa_driver_wext_data *drv = priv;
2388         int ret;
2389
2390         ret = send(drv->mlme_sock, data, data_len, 0);
2391         if (ret < 0) {
2392                 perror("send[MLME]");
2393                 return -1;
2394         }
2395
2396         return 0;
2397 }
2398
2399
2400 static int wpa_driver_wext_mlme_add_sta(void *priv, const u8 *addr,
2401                                         const u8 *supp_rates,
2402                                         size_t supp_rates_len)
2403 {
2404         struct wpa_driver_wext_data *drv = priv;
2405         struct prism2_hostapd_param param;
2406         size_t len;
2407
2408         os_memset(&param, 0, sizeof(param));
2409         param.cmd = PRISM2_HOSTAPD_ADD_STA;
2410         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2411         len = supp_rates_len;
2412         if (len > sizeof(param.u.add_sta.supp_rates))
2413                 len = sizeof(param.u.add_sta.supp_rates);
2414         os_memcpy(param.u.add_sta.supp_rates, supp_rates, len);
2415         return hostapd_ioctl(drv, &param, sizeof(param));
2416 }
2417
2418
2419 static int wpa_driver_wext_mlme_remove_sta(void *priv, const u8 *addr)
2420 {
2421         struct wpa_driver_wext_data *drv = priv;
2422         struct prism2_hostapd_param param;
2423
2424         os_memset(&param, 0, sizeof(param));
2425         param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
2426         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2427         return hostapd_ioctl(drv, &param, sizeof(param));
2428 }
2429
2430 #endif /* CONFIG_CLIENT_MLME */
2431
2432
2433 static int wpa_driver_wext_set_param(void *priv, const char *param)
2434 {
2435 #ifdef CONFIG_CLIENT_MLME
2436         struct wpa_driver_wext_data *drv = priv;
2437         const char *pos, *pos2;
2438         size_t len;
2439
2440         if (param == NULL)
2441                 return 0;
2442
2443         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2444
2445         pos = os_strstr(param, "mlmedev=");
2446         if (pos) {
2447                 pos += 8;
2448                 pos2 = os_strchr(pos, ' ');
2449                 if (pos2)
2450                         len = pos2 - pos;
2451                 else
2452                         len = os_strlen(pos);
2453                 if (len + 1 > sizeof(drv->mlmedev))
2454                         return -1;
2455                 os_memcpy(drv->mlmedev, pos, len);
2456                 drv->mlmedev[len] = '\0';
2457                 wpa_printf(MSG_DEBUG, "WEXT: Using user space MLME with "
2458                            "mlmedev='%s'", drv->mlmedev);
2459                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2460
2461                 drv->mlme_sock = wpa_driver_wext_open_mlme(drv);
2462                 if (drv->mlme_sock < 0)
2463                         return -1;
2464         }
2465 #endif /* CONFIG_CLIENT_MLME */
2466
2467         return 0;
2468 }
2469
2470
2471 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2472 {
2473         return drv->we_version_compiled;
2474 }
2475
2476
2477 const struct wpa_driver_ops wpa_driver_wext_ops = {
2478         .name = "wext",
2479         .desc = "Linux wireless extensions (generic)",
2480         .get_bssid = wpa_driver_wext_get_bssid,
2481         .get_ssid = wpa_driver_wext_get_ssid,
2482         .set_wpa = wpa_driver_wext_set_wpa,
2483         .set_key = wpa_driver_wext_set_key,
2484         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2485         .set_drop_unencrypted = wpa_driver_wext_set_drop_unencrypted,
2486         .scan = wpa_driver_wext_scan,
2487         .get_scan_results = wpa_driver_wext_get_scan_results,
2488         .deauthenticate = wpa_driver_wext_deauthenticate,
2489         .disassociate = wpa_driver_wext_disassociate,
2490         .associate = wpa_driver_wext_associate,
2491         .set_auth_alg = wpa_driver_wext_set_auth_alg,
2492         .init = wpa_driver_wext_init,
2493         .deinit = wpa_driver_wext_deinit,
2494         .set_param = wpa_driver_wext_set_param,
2495         .add_pmkid = wpa_driver_wext_add_pmkid,
2496         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2497         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2498         .get_capa = wpa_driver_wext_get_capa,
2499         .set_operstate = wpa_driver_wext_set_operstate,
2500 #ifdef CONFIG_CLIENT_MLME
2501         .get_hw_feature_data = wpa_driver_wext_get_hw_feature_data,
2502         .set_channel = wpa_driver_wext_set_channel,
2503         .set_ssid = wpa_driver_wext_set_ssid,
2504         .set_bssid = wpa_driver_wext_set_bssid,
2505         .send_mlme = wpa_driver_wext_send_mlme,
2506         .mlme_add_sta = wpa_driver_wext_mlme_add_sta,
2507         .mlme_remove_sta = wpa_driver_wext_mlme_remove_sta,
2508 #endif /* CONFIG_CLIENT_MLME */
2509 };