src/drivers/driver_wext.c

   1 /*
   2  * WPA Supplicant - driver interaction with generic Linux Wireless Extensions
   3  * Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements a driver interface for the Linux Wireless Extensions.
  15  * When used with WE-18 or newer, this interface can be used as-is with number
  16  * of drivers. In addition to this, some of the common functions in this file
  17  * can be used by other driver interface implementations that use generic WE
  18  * ioctls, but require private ioctls for some of the functionality.
  19  */
  20
  21 #include "includes.h"
  22 #include <sys/ioctl.h>
  23 #include <net/if_arp.h>
  24
  25 #include "wireless_copy.h"
  26 #include "common.h"
  27 #include "driver.h"
  28 #include "eloop.h"
  29 #include "priv_netlink.h"
  30 #include "driver_wext.h"
  31 #include "ieee802_11_defs.h"
  32
  33 #ifdef CONFIG_CLIENT_MLME
  34 #include <netpacket/packet.h>
  35 /* old definitions from net/mac80211 */
  36
  37 typedef u32 __bitwise __be32;
  38 typedef u64 __bitwise __be64;
  39
  40 #define PRISM2_IOCTL_PRISM2_PARAM (SIOCIWFIRSTPRIV + 0)
  41 #define PRISM2_IOCTL_GET_PRISM2_PARAM (SIOCIWFIRSTPRIV + 1)
  42 #define PRISM2_IOCTL_HOSTAPD (SIOCIWFIRSTPRIV + 3)
  43
  44 #define PRISM2_PARAM_USER_SPACE_MLME 1045
  45 #define PRISM2_PARAM_MGMT_IF            1046
  46 #define PRISM2_HOSTAPD_ADD_STA 2
  47 #define PRISM2_HOSTAPD_REMOVE_STA 3
  48 #define PRISM2_HOSTAPD_GET_HW_FEATURES  1002
  49 #define PRISM2_HOSTAPD_MAX_BUF_SIZE     2048
  50
  51 #ifndef ALIGNED
  52 #define ALIGNED __attribute__ ((aligned))
  53 #endif
  54
  55 struct prism2_hostapd_param {
  56         u32 cmd;
  57         u8 sta_addr[ETH_ALEN];
  58         u8 pad[2];
  59         union {
  60                 struct {
  61                         u16 aid;
  62                         u16 capability;
  63                         u8 supp_rates[32];
  64                         u8 wds_flags;
  65 #define IEEE80211_STA_DYNAMIC_ENC BIT(0)
  66                         u8 enc_flags;
  67                         u16 listen_interval;
  68                 } add_sta;
  69                 struct {
  70                         u16 num_modes;
  71                         u16 flags;
  72                         u8 data[0] ALIGNED; /* num_modes * feature data */
  73                 } hw_features;
  74                 struct {
  75                         u16 mode; /* MODE_* */
  76                         u16 num_supported_rates;
  77                         u16 num_basic_rates;
  78                         u8 data[0] ALIGNED; /* num_supported_rates * u16 +
  79                                              * num_basic_rates * u16 */
  80                 } set_rate_sets;
  81                 struct {
  82                         u16 mode; /* MODE_* */
  83                         u16 chan;
  84                         u32 flag;
  85                         u8 power_level; /* regulatory limit in dBm */
  86                         u8 antenna_max;
  87                 } set_channel_flag;
  88                 struct {
  89                         u32 rd;
  90                 } set_regulatory_domain;
  91                 struct {
  92                         u32 queue;
  93                         s32 aifs;
  94                         u32 cw_min;
  95                         u32 cw_max;
  96                         u32 burst_time; /* maximum burst time in 0.1 ms, i.e.,
  97                                          * 10 = 1 ms */
  98                 } tx_queue_params;
  99         } u;
 100 };
 101
 102 struct hostapd_ioctl_hw_modes_hdr {
 103         int mode;
 104         int num_channels;
 105         int num_rates;
 106 };
 107
 108 /*
 109  * frame format for the management interface that is slated
 110  * to be replaced by "cooked monitor" with radiotap
 111  */
 112 #define IEEE80211_FI_VERSION 0x80211001
 113 struct ieee80211_frame_info {
 114         __be32 version;
 115         __be32 length;
 116         __be64 mactime;
 117         __be64 hosttime;
 118         __be32 phytype;
 119         __be32 channel;
 120         __be32 datarate;
 121         __be32 antenna;
 122         __be32 priority;
 123         __be32 ssi_type;
 124         __be32 ssi_signal;
 125         __be32 ssi_noise;
 126         __be32 preamble;
 127         __be32 encoding;
 128
 129         /* Note: this structure is otherwise identical to capture format used
 130          * in linux-wlan-ng, but this additional field is used to provide meta
 131          * data about the frame to hostapd. This was the easiest method for
 132          * providing this information, but this might change in the future. */
 133         __be32 msg_type;
 134 } __attribute__ ((packed));
 135
 136 /* old mode definitions */
 137 enum {
 138         MODE_IEEE80211A = 0 /* IEEE 802.11a */,
 139         MODE_IEEE80211B = 1 /* IEEE 802.11b only */,
 140         MODE_ATHEROS_TURBO = 2 /* Atheros Turbo mode (2x.11a at 5 GHz) */,
 141         MODE_IEEE80211G = 3 /* IEEE 802.11g (and 802.11b compatibility) */,
 142         MODE_ATHEROS_TURBOG = 4 /* Atheros Turbo mode (2x.11g at 2.4 GHz) */,
 143         NUM_IEEE80211_MODES = 5
 144 };
 145
 146 #ifndef ETH_P_ALL
 147 #define ETH_P_ALL 0x0003
 148 #endif
 149 #endif /* CONFIG_CLIENT_MLME */
 150
 151
 152
 153
 154 static int wpa_driver_wext_flush_pmkid(void *priv);
 155 static int wpa_driver_wext_get_range(void *priv);
 156
 157 static int wpa_driver_wext_send_oper_ifla(struct wpa_driver_wext_data *drv,
 158                                           int linkmode, int operstate)
 159 {
 160         struct {
 161                 struct nlmsghdr hdr;
 162                 struct ifinfomsg ifinfo;
 163                 char opts[16];
 164         } req;
 165         struct rtattr *rta;
 166         static int nl_seq;
 167         ssize_t ret;
 168
 169         os_memset(&req, 0, sizeof(req));
 170
 171         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 172         req.hdr.nlmsg_type = RTM_SETLINK;
 173         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 174         req.hdr.nlmsg_seq = ++nl_seq;
 175         req.hdr.nlmsg_pid = 0;
 176
 177         req.ifinfo.ifi_family = AF_UNSPEC;
 178         req.ifinfo.ifi_type = 0;
 179         req.ifinfo.ifi_index = drv->ifindex;
 180         req.ifinfo.ifi_flags = 0;
 181         req.ifinfo.ifi_change = 0;
 182
 183         if (linkmode != -1) {
 184                 rta = (struct rtattr *)
 185                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 186                 rta->rta_type = IFLA_LINKMODE;
 187                 rta->rta_len = RTA_LENGTH(sizeof(char));
 188                 *((char *) RTA_DATA(rta)) = linkmode;
 189                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 190                         RTA_LENGTH(sizeof(char));
 191         }
 192         if (operstate != -1) {
 193                 rta = (struct rtattr *)
 194                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 195                 rta->rta_type = IFLA_OPERSTATE;
 196                 rta->rta_len = RTA_LENGTH(sizeof(char));
 197                 *((char *) RTA_DATA(rta)) = operstate;
 198                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 199                         RTA_LENGTH(sizeof(char));
 200         }
 201
 202         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 203                    linkmode, operstate);
 204
 205         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 206         if (ret < 0) {
 207                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 208                            "%s (assume operstate is not supported)",
 209                            strerror(errno));
 210         }
 211
 212         return ret < 0 ? -1 : 0;
 213 }
 214
 215
 216 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
 217                                    int idx, u32 value)
 218 {
 219         struct iwreq iwr;
 220         int ret = 0;
 221
 222         os_memset(&iwr, 0, sizeof(iwr));
 223         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 224         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 225         iwr.u.param.value = value;
 226
 227         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 228                 if (errno != EOPNOTSUPP) {
 229                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 230                                    "value 0x%x) failed: %s)",
 231                                    idx, value, strerror(errno));
 232                 }
 233                 ret = errno == EOPNOTSUPP ? -2 : -1;
 234         }
 235
 236         return ret;
 237 }
 238
 239
 240 /**
 241  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
 242  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 243  * @bssid: Buffer for BSSID
 244  * Returns: 0 on success, -1 on failure
 245  */
 246 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
 247 {
 248         struct wpa_driver_wext_data *drv = priv;
 249         struct iwreq iwr;
 250         int ret = 0;
 251
 252         os_memset(&iwr, 0, sizeof(iwr));
 253         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 254
 255         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 256                 perror("ioctl[SIOCGIWAP]");
 257                 ret = -1;
 258         }
 259         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 260
 261         return ret;
 262 }
 263
 264
 265 /**
 266  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
 267  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 268  * @bssid: BSSID
 269  * Returns: 0 on success, -1 on failure
 270  */
 271 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
 272 {
 273         struct wpa_driver_wext_data *drv = priv;
 274         struct iwreq iwr;
 275         int ret = 0;
 276
 277         os_memset(&iwr, 0, sizeof(iwr));
 278         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 279         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 280         if (bssid)
 281                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 282         else
 283                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 284
 285         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 286                 perror("ioctl[SIOCSIWAP]");
 287                 ret = -1;
 288         }
 289
 290         return ret;
 291 }
 292
 293
 294 /**
 295  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 296  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 297  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 298  * Returns: SSID length on success, -1 on failure
 299  */
 300 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 301 {
 302         struct wpa_driver_wext_data *drv = priv;
 303         struct iwreq iwr;
 304         int ret = 0;
 305
 306         os_memset(&iwr, 0, sizeof(iwr));
 307         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 308         iwr.u.essid.pointer = (caddr_t) ssid;
 309         iwr.u.essid.length = 32;
 310
 311         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 312                 perror("ioctl[SIOCGIWESSID]");
 313                 ret = -1;
 314         } else {
 315                 ret = iwr.u.essid.length;
 316                 if (ret > 32)
 317                         ret = 32;
 318                 /* Some drivers include nul termination in the SSID, so let's
 319                  * remove it here before further processing. WE-21 changes this
 320                  * to explicitly require the length _not_ to include nul
 321                  * termination. */
 322                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 323                     drv->we_version_compiled < 21)
 324                         ret--;
 325         }
 326
 327         return ret;
 328 }
 329
 330
 331 /**
 332  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 333  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 334  * @ssid: SSID
 335  * @ssid_len: Length of SSID (0..32)
 336  * Returns: 0 on success, -1 on failure
 337  */
 338 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 339 {
 340         struct wpa_driver_wext_data *drv = priv;
 341         struct iwreq iwr;
 342         int ret = 0;
 343         char buf[33];
 344
 345         if (ssid_len > 32)
 346                 return -1;
 347
 348         os_memset(&iwr, 0, sizeof(iwr));
 349         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 350         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 351         iwr.u.essid.flags = (ssid_len != 0);
 352         os_memset(buf, 0, sizeof(buf));
 353         os_memcpy(buf, ssid, ssid_len);
 354         iwr.u.essid.pointer = (caddr_t) buf;
 355         if (drv->we_version_compiled < 21) {
 356                 /* For historic reasons, set SSID length to include one extra
 357                  * character, C string nul termination, even though SSID is
 358                  * really an octet string that should not be presented as a C
 359                  * string. Some Linux drivers decrement the length by one and
 360                  * can thus end up missing the last octet of the SSID if the
 361                  * length is not incremented here. WE-21 changes this to
 362                  * explicitly require the length _not_ to include nul
 363                  * termination. */
 364                 if (ssid_len)
 365                         ssid_len++;
 366         }
 367         iwr.u.essid.length = ssid_len;
 368
 369         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 370                 perror("ioctl[SIOCSIWESSID]");
 371                 ret = -1;
 372         }
 373
 374         return ret;
 375 }
 376
 377
 378 /**
 379  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 380  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 381  * @freq: Frequency in MHz
 382  * Returns: 0 on success, -1 on failure
 383  */
 384 int wpa_driver_wext_set_freq(void *priv, int freq)
 385 {
 386         struct wpa_driver_wext_data *drv = priv;
 387         struct iwreq iwr;
 388         int ret = 0;
 389
 390         os_memset(&iwr, 0, sizeof(iwr));
 391         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 392         iwr.u.freq.m = freq * 100000;
 393         iwr.u.freq.e = 1;
 394
 395         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 396                 perror("ioctl[SIOCSIWFREQ]");
 397                 ret = -1;
 398         }
 399
 400         return ret;
 401 }
 402
 403
 404 static void
 405 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 406 {
 407         union wpa_event_data data;
 408
 409         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 410                    custom);
 411
 412         os_memset(&data, 0, sizeof(data));
 413         /* Host AP driver */
 414         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 415                 data.michael_mic_failure.unicast =
 416                         os_strstr(custom, " unicast ") != NULL;
 417                 /* TODO: parse parameters(?) */
 418                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 419         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 420                 char *spos;
 421                 int bytes;
 422
 423                 spos = custom + 17;
 424
 425                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 426                 if (!bytes || (bytes & 1))
 427                         return;
 428                 bytes /= 2;
 429
 430                 data.assoc_info.req_ies = os_malloc(bytes);
 431                 if (data.assoc_info.req_ies == NULL)
 432                         return;
 433
 434                 data.assoc_info.req_ies_len = bytes;
 435                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 436
 437                 spos += bytes * 2;
 438
 439                 data.assoc_info.resp_ies = NULL;
 440                 data.assoc_info.resp_ies_len = 0;
 441
 442                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 443                         spos += 9;
 444
 445                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 446                         if (!bytes || (bytes & 1))
 447                                 goto done;
 448                         bytes /= 2;
 449
 450                         data.assoc_info.resp_ies = os_malloc(bytes);
 451                         if (data.assoc_info.resp_ies == NULL)
 452                                 goto done;
 453
 454                         data.assoc_info.resp_ies_len = bytes;
 455                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 456                 }
 457
 458                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 459
 460         done:
 461                 os_free(data.assoc_info.resp_ies);
 462                 os_free(data.assoc_info.req_ies);
 463 #ifdef CONFIG_PEERKEY
 464         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 465                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 466                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 467                                    "STKSTART.request '%s'", custom + 17);
 468                         return;
 469                 }
 470                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 471 #endif /* CONFIG_PEERKEY */
 472         }
 473 }
 474
 475
 476 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 477         void *ctx, const char *ev, size_t len)
 478 {
 479         const struct iw_michaelmicfailure *mic;
 480         union wpa_event_data data;
 481
 482         if (len < sizeof(*mic))
 483                 return -1;
 484
 485         mic = (const struct iw_michaelmicfailure *) ev;
 486
 487         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 488                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 489                    MAC2STR(mic->src_addr.sa_data));
 490
 491         os_memset(&data, 0, sizeof(data));
 492         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 493         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 494
 495         return 0;
 496 }
 497
 498
 499 static int wpa_driver_wext_event_wireless_pmkidcand(
 500         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 501 {
 502         const struct iw_pmkid_cand *cand;
 503         union wpa_event_data data;
 504         const u8 *addr;
 505
 506         if (len < sizeof(*cand))
 507                 return -1;
 508
 509         cand = (const struct iw_pmkid_cand *) ev;
 510         addr = (const u8 *) cand->bssid.sa_data;
 511
 512         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 513                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 514                    cand->index, MAC2STR(addr));
 515
 516         os_memset(&data, 0, sizeof(data));
 517         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 518         data.pmkid_candidate.index = cand->index;
 519         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 520         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 521
 522         return 0;
 523 }
 524
 525
 526 static int wpa_driver_wext_event_wireless_assocreqie(
 527         struct wpa_driver_wext_data *drv, const char *ev, int len)
 528 {
 529         if (len < 0)
 530                 return -1;
 531
 532         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 533                     len);
 534         os_free(drv->assoc_req_ies);
 535         drv->assoc_req_ies = os_malloc(len);
 536         if (drv->assoc_req_ies == NULL) {
 537                 drv->assoc_req_ies_len = 0;
 538                 return -1;
 539         }
 540         os_memcpy(drv->assoc_req_ies, ev, len);
 541         drv->assoc_req_ies_len = len;
 542
 543         return 0;
 544 }
 545
 546
 547 static int wpa_driver_wext_event_wireless_assocrespie(
 548         struct wpa_driver_wext_data *drv, const char *ev, int len)
 549 {
 550         if (len < 0)
 551                 return -1;
 552
 553         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 554                     len);
 555         os_free(drv->assoc_resp_ies);
 556         drv->assoc_resp_ies = os_malloc(len);
 557         if (drv->assoc_resp_ies == NULL) {
 558                 drv->assoc_resp_ies_len = 0;
 559                 return -1;
 560         }
 561         os_memcpy(drv->assoc_resp_ies, ev, len);
 562         drv->assoc_resp_ies_len = len;
 563
 564         return 0;
 565 }
 566
 567
 568 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 569 {
 570         union wpa_event_data data;
 571
 572         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 573                 return;
 574
 575         os_memset(&data, 0, sizeof(data));
 576         if (drv->assoc_req_ies) {
 577                 data.assoc_info.req_ies = drv->assoc_req_ies;
 578                 drv->assoc_req_ies = NULL;
 579                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 580         }
 581         if (drv->assoc_resp_ies) {
 582                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 583                 drv->assoc_resp_ies = NULL;
 584                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 585         }
 586
 587         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 588
 589         os_free(data.assoc_info.req_ies);
 590         os_free(data.assoc_info.resp_ies);
 591 }
 592
 593
 594 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 595                                            void *ctx, char *data, int len)
 596 {
 597         struct iw_event iwe_buf, *iwe = &iwe_buf;
 598         char *pos, *end, *custom, *buf;
 599
 600         pos = data;
 601         end = data + len;
 602
 603         while (pos + IW_EV_LCP_LEN <= end) {
 604                 /* Event data may be unaligned, so make a local, aligned copy
 605                  * before processing. */
 606                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 607                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 608                            iwe->cmd, iwe->len);
 609                 if (iwe->len <= IW_EV_LCP_LEN)
 610                         return;
 611
 612                 custom = pos + IW_EV_POINT_LEN;
 613                 if (drv->we_version_compiled > 18 &&
 614                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 615                      iwe->cmd == IWEVCUSTOM ||
 616                      iwe->cmd == IWEVASSOCREQIE ||
 617                      iwe->cmd == IWEVASSOCRESPIE ||
 618                      iwe->cmd == IWEVPMKIDCAND)) {
 619                         /* WE-19 removed the pointer from struct iw_point */
 620                         char *dpos = (char *) &iwe_buf.u.data.length;
 621                         int dlen = dpos - (char *) &iwe_buf;
 622                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 623                                   sizeof(struct iw_event) - dlen);
 624                 } else {
 625                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 626                         custom += IW_EV_POINT_OFF;
 627                 }
 628
 629                 switch (iwe->cmd) {
 630                 case SIOCGIWAP:
 631                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 632                                    MACSTR,
 633                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 634                         if (is_zero_ether_addr(
 635                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 636                             os_memcmp(iwe->u.ap_addr.sa_data,
 637                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 638                             0) {
 639                                 os_free(drv->assoc_req_ies);
 640                                 drv->assoc_req_ies = NULL;
 641                                 os_free(drv->assoc_resp_ies);
 642                                 drv->assoc_resp_ies = NULL;
 643                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 644                                                      NULL);
 645
 646                         } else {
 647                                 wpa_driver_wext_event_assoc_ies(drv);
 648                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 649                         }
 650                         break;
 651                 case IWEVMICHAELMICFAILURE:
 652                         wpa_driver_wext_event_wireless_michaelmicfailure(
 653                                 ctx, custom, iwe->u.data.length);
 654                         break;
 655                 case IWEVCUSTOM:
 656                         if (custom + iwe->u.data.length > end)
 657                                 return;
 658                         buf = os_malloc(iwe->u.data.length + 1);
 659                         if (buf == NULL)
 660                                 return;
 661                         os_memcpy(buf, custom, iwe->u.data.length);
 662                         buf[iwe->u.data.length] = '\0';
 663                         wpa_driver_wext_event_wireless_custom(ctx, buf);
 664                         os_free(buf);
 665                         break;
 666                 case SIOCGIWSCAN:
 667                         drv->scan_complete_events = 1;
 668                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 669                                              drv, ctx);
 670                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 671                         break;
 672                 case IWEVASSOCREQIE:
 673                         wpa_driver_wext_event_wireless_assocreqie(
 674                                 drv, custom, iwe->u.data.length);
 675                         break;
 676                 case IWEVASSOCRESPIE:
 677                         wpa_driver_wext_event_wireless_assocrespie(
 678                                 drv, custom, iwe->u.data.length);
 679                         break;
 680                 case IWEVPMKIDCAND:
 681                         wpa_driver_wext_event_wireless_pmkidcand(
 682                                 drv, custom, iwe->u.data.length);
 683                         break;
 684                 }
 685
 686                 pos += iwe->len;
 687         }
 688 }
 689
 690
 691 static void wpa_driver_wext_event_link(void *ctx, char *buf, size_t len,
 692                                        int del)
 693 {
 694         union wpa_event_data event;
 695
 696         os_memset(&event, 0, sizeof(event));
 697         if (len > sizeof(event.interface_status.ifname))
 698                 len = sizeof(event.interface_status.ifname) - 1;
 699         os_memcpy(event.interface_status.ifname, buf, len);
 700         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 701                 EVENT_INTERFACE_ADDED;
 702
 703         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 704                    del ? "DEL" : "NEW",
 705                    event.interface_status.ifname,
 706                    del ? "removed" : "added");
 707
 708         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 709 }
 710
 711
 712 static void wpa_driver_wext_event_rtm_newlink(struct wpa_driver_wext_data *drv,
 713                                               void *ctx, struct nlmsghdr *h,
 714                                               size_t len)
 715 {
 716         struct ifinfomsg *ifi;
 717         int attrlen, nlmsg_len, rta_len;
 718         struct rtattr * attr;
 719
 720         if (len < sizeof(*ifi))
 721                 return;
 722
 723         ifi = NLMSG_DATA(h);
 724
 725         if (drv->ifindex != ifi->ifi_index && drv->ifindex2 != ifi->ifi_index)
 726         {
 727                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 728                            ifi->ifi_index);
 729                 return;
 730         }
 731
 732         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 733                    "(%s%s%s%s)",
 734                    drv->operstate, ifi->ifi_flags,
 735                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 736                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 737                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 738                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 739         /*
 740          * Some drivers send the association event before the operup event--in
 741          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 742          * fails. This will hit us when wpa_supplicant does not need to do
 743          * IEEE 802.1X authentication
 744          */
 745         if (drv->operstate == 1 &&
 746             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 747             !(ifi->ifi_flags & IFF_RUNNING))
 748                 wpa_driver_wext_send_oper_ifla(drv, -1, IF_OPER_UP);
 749
 750         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 751
 752         attrlen = h->nlmsg_len - nlmsg_len;
 753         if (attrlen < 0)
 754                 return;
 755
 756         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 757
 758         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 759         while (RTA_OK(attr, attrlen)) {
 760                 if (attr->rta_type == IFLA_WIRELESS) {
 761                         wpa_driver_wext_event_wireless(
 762                                 drv, ctx, ((char *) attr) + rta_len,
 763                                 attr->rta_len - rta_len);
 764                 } else if (attr->rta_type == IFLA_IFNAME) {
 765                         wpa_driver_wext_event_link(ctx,
 766                                                    ((char *) attr) + rta_len,
 767                                                    attr->rta_len - rta_len, 0);
 768                 }
 769                 attr = RTA_NEXT(attr, attrlen);
 770         }
 771 }
 772
 773
 774 static void wpa_driver_wext_event_rtm_dellink(struct wpa_driver_wext_data *drv,
 775                                               void *ctx, struct nlmsghdr *h,
 776                                               size_t len)
 777 {
 778         struct ifinfomsg *ifi;
 779         int attrlen, nlmsg_len, rta_len;
 780         struct rtattr * attr;
 781
 782         if (len < sizeof(*ifi))
 783                 return;
 784
 785         ifi = NLMSG_DATA(h);
 786
 787         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 788
 789         attrlen = h->nlmsg_len - nlmsg_len;
 790         if (attrlen < 0)
 791                 return;
 792
 793         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 794
 795         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 796         while (RTA_OK(attr, attrlen)) {
 797                 if (attr->rta_type == IFLA_IFNAME) {
 798                         wpa_driver_wext_event_link(ctx,
 799                                                    ((char *) attr) + rta_len,
 800                                                    attr->rta_len - rta_len, 1);
 801                 }
 802                 attr = RTA_NEXT(attr, attrlen);
 803         }
 804 }
 805
 806
 807 static void wpa_driver_wext_event_receive(int sock, void *eloop_ctx,
 808                                           void *sock_ctx)
 809 {
 810         char buf[8192];
 811         int left;
 812         struct sockaddr_nl from;
 813         socklen_t fromlen;
 814         struct nlmsghdr *h;
 815         int max_events = 10;
 816
 817 try_again:
 818         fromlen = sizeof(from);
 819         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 820                         (struct sockaddr *) &from, &fromlen);
 821         if (left < 0) {
 822                 if (errno != EINTR && errno != EAGAIN)
 823                         perror("recvfrom(netlink)");
 824                 return;
 825         }
 826
 827         h = (struct nlmsghdr *) buf;
 828         while (left >= (int) sizeof(*h)) {
 829                 int len, plen;
 830
 831                 len = h->nlmsg_len;
 832                 plen = len - sizeof(*h);
 833                 if (len > left || plen < 0) {
 834                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 835                                    "len=%d left=%d plen=%d",
 836                                    len, left, plen);
 837                         break;
 838                 }
 839
 840                 switch (h->nlmsg_type) {
 841                 case RTM_NEWLINK:
 842                         wpa_driver_wext_event_rtm_newlink(eloop_ctx, sock_ctx,
 843                                                           h, plen);
 844                         break;
 845                 case RTM_DELLINK:
 846                         wpa_driver_wext_event_rtm_dellink(eloop_ctx, sock_ctx,
 847                                                           h, plen);
 848                         break;
 849                 }
 850
 851                 len = NLMSG_ALIGN(len);
 852                 left -= len;
 853                 h = (struct nlmsghdr *) ((char *) h + len);
 854         }
 855
 856         if (left > 0) {
 857                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 858                            "message", left);
 859         }
 860
 861         if (--max_events > 0) {
 862                 /*
 863                  * Try to receive all events in one eloop call in order to
 864                  * limit race condition on cases where AssocInfo event, Assoc
 865                  * event, and EAPOL frames are received more or less at the
 866                  * same time. We want to process the event messages first
 867                  * before starting EAPOL processing.
 868                  */
 869                 goto try_again;
 870         }
 871 }
 872
 873
 874 static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
 875                                               const char *ifname, int *flags)
 876 {
 877         struct ifreq ifr;
 878
 879         os_memset(&ifr, 0, sizeof(ifr));
 880         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 881         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 882                 perror("ioctl[SIOCGIFFLAGS]");
 883                 return -1;
 884         }
 885         *flags = ifr.ifr_flags & 0xffff;
 886         return 0;
 887 }
 888
 889
 890 /**
 891  * wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 892  * @drv: driver_wext private data
 893  * @flags: Pointer to returned flags value
 894  * Returns: 0 on success, -1 on failure
 895  */
 896 int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
 897 {
 898         return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
 899 }
 900
 901
 902 static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
 903                                               const char *ifname, int flags)
 904 {
 905         struct ifreq ifr;
 906
 907         os_memset(&ifr, 0, sizeof(ifr));
 908         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 909         ifr.ifr_flags = flags & 0xffff;
 910         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 911                 perror("SIOCSIFFLAGS");
 912                 return -1;
 913         }
 914         return 0;
 915 }
 916
 917
 918 #ifdef CONFIG_CLIENT_MLME
 919
 920 static int wpa_driver_prism2_param_set(struct wpa_driver_wext_data *drv,
 921                                        int param, int value)
 922 {
 923         struct iwreq iwr;
 924         int *i;
 925
 926         os_memset(&iwr, 0, sizeof(iwr));
 927         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 928         i = (int *) iwr.u.name;
 929         *i++ = param;
 930         *i++ = value;
 931
 932         return ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr);
 933 }
 934
 935
 936 static int wpa_driver_prism2_param_get(struct wpa_driver_wext_data *drv,
 937                                        int param)
 938 {
 939         struct iwreq iwr;
 940         int *i;
 941
 942         os_memset(&iwr, 0, sizeof(iwr));
 943         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 944         i = (int *) iwr.u.name;
 945         *i = param;
 946
 947         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_GET_PRISM2_PARAM, &iwr) < 0) {
 948                 perror("ioctl[PRISM2_IOCTL_GET_PRISM2_PARAM]");
 949                 return -1;
 950         }
 951
 952         return *i;
 953 }
 954
 955 #endif /* CONFIG_CLIENT_MLME */
 956
 957
 958 /**
 959  * wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 960  * @drv: driver_wext private data
 961  * @flags: New value for flags
 962  * Returns: 0 on success, -1 on failure
 963  */
 964 int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
 965 {
 966         return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
 967 }
 968
 969
 970 /**
 971  * wpa_driver_wext_init - Initialize WE driver interface
 972  * @ctx: context to be used when calling wpa_supplicant functions,
 973  * e.g., wpa_supplicant_event()
 974  * @ifname: interface name, e.g., wlan0
 975  * Returns: Pointer to private data, %NULL on failure
 976  */
 977 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 978 {
 979         int s, flags;
 980         struct sockaddr_nl local;
 981         struct wpa_driver_wext_data *drv;
 982
 983         drv = os_zalloc(sizeof(*drv));
 984         if (drv == NULL)
 985                 return NULL;
 986         drv->ctx = ctx;
 987         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 988
 989         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 990         if (drv->ioctl_sock < 0) {
 991                 perror("socket(PF_INET,SOCK_DGRAM)");
 992                 os_free(drv);
 993                 return NULL;
 994         }
 995
 996         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 997         if (s < 0) {
 998                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
 999                 close(drv->ioctl_sock);
1000                 os_free(drv);
1001                 return NULL;
1002         }
1003
1004         os_memset(&local, 0, sizeof(local));
1005         local.nl_family = AF_NETLINK;
1006         local.nl_groups = RTMGRP_LINK;
1007         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1008                 perror("bind(netlink)");
1009                 close(s);
1010                 close(drv->ioctl_sock);
1011                 os_free(drv);
1012                 return NULL;
1013         }
1014
1015         eloop_register_read_sock(s, wpa_driver_wext_event_receive, drv, ctx);
1016         drv->event_sock = s;
1017
1018         drv->mlme_sock = -1;
1019
1020         if (wpa_driver_wext_get_ifflags(drv, &flags) != 0)
1021                 printf("Could not get interface '%s' flags\n", drv->ifname);
1022         else if (!(flags & IFF_UP)) {
1023                 if (wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
1024                         printf("Could not set interface '%s' UP\n",
1025                                drv->ifname);
1026                 } else {
1027                         /*
1028                          * Wait some time to allow driver to initialize before
1029                          * starting configuring the driver. This seems to be
1030                          * needed at least some drivers that load firmware etc.
1031                          * when the interface is set up.
1032                          */
1033                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
1034                                    "a second for the driver to complete "
1035                                    "initialization", drv->ifname);
1036                         sleep(1);
1037                 }
1038         }
1039
1040         /*
1041          * Make sure that the driver does not have any obsolete PMKID entries.
1042          */
1043         wpa_driver_wext_flush_pmkid(drv);
1044
1045         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
1046                 printf("Could not configure driver to use managed mode\n");
1047         }
1048
1049         wpa_driver_wext_get_range(drv);
1050
1051         drv->ifindex = if_nametoindex(drv->ifname);
1052
1053         if (os_strncmp(ifname, "wlan", 4) == 0) {
1054                 /*
1055                  * Host AP driver may use both wlan# and wifi# interface in
1056                  * wireless events. Since some of the versions included WE-18
1057                  * support, let's add the alternative ifindex also from
1058                  * driver_wext.c for the time being. This may be removed at
1059                  * some point once it is believed that old versions of the
1060                  * driver are not in use anymore.
1061                  */
1062                 char ifname2[IFNAMSIZ + 1];
1063                 os_strlcpy(ifname2, ifname, sizeof(ifname2));
1064                 os_memcpy(ifname2, "wifi", 4);
1065                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
1066         }
1067
1068         wpa_driver_wext_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1069
1070         return drv;
1071 }
1072
1073
1074 /**
1075  * wpa_driver_wext_deinit - Deinitialize WE driver interface
1076  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1077  *
1078  * Shut down driver interface and processing of driver events. Free
1079  * private data buffer if one was allocated in wpa_driver_wext_init().
1080  */
1081 void wpa_driver_wext_deinit(void *priv)
1082 {
1083         struct wpa_driver_wext_data *drv = priv;
1084         int flags;
1085
1086         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1087
1088         /*
1089          * Clear possibly configured driver parameters in order to make it
1090          * easier to use the driver after wpa_supplicant has been terminated.
1091          */
1092         (void) wpa_driver_wext_set_bssid(drv,
1093                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1094
1095         wpa_driver_wext_send_oper_ifla(priv, 0, IF_OPER_UP);
1096
1097         eloop_unregister_read_sock(drv->event_sock);
1098         if (drv->mlme_sock >= 0)
1099                 eloop_unregister_read_sock(drv->mlme_sock);
1100
1101         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
1102                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
1103
1104 #ifdef CONFIG_CLIENT_MLME
1105         if (drv->mlmedev[0]) {
1106                 if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev,
1107                                                        &flags) == 0)
1108                         (void) wpa_driver_wext_set_ifflags_ifname(
1109                                 drv, drv->mlmedev, flags & ~IFF_UP);
1110                 wpa_driver_prism2_param_set(drv, PRISM2_PARAM_MGMT_IF, 0);
1111                 wpa_driver_prism2_param_set(drv, PRISM2_PARAM_USER_SPACE_MLME,
1112                                             0);
1113         }
1114 #endif /* CONFIG_CLIENT_MLME */
1115
1116         close(drv->event_sock);
1117         close(drv->ioctl_sock);
1118         if (drv->mlme_sock >= 0)
1119                 close(drv->mlme_sock);
1120         os_free(drv->assoc_req_ies);
1121         os_free(drv->assoc_resp_ies);
1122         os_free(drv);
1123 }
1124
1125
1126 /**
1127  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1128  * @eloop_ctx: Unused
1129  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1130  *
1131  * This function can be used as registered timeout when starting a scan to
1132  * generate a scan completed event if the driver does not report this.
1133  */
1134 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1135 {
1136         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1137         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1138 }
1139
1140
1141 /**
1142  * wpa_driver_wext_scan - Request the driver to initiate scan
1143  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1144  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1145  *      all SSIDs (either active scan with broadcast SSID or passive
1146  *      scan
1147  * @ssid_len: Length of the SSID
1148  * Returns: 0 on success, -1 on failure
1149  */
1150 int wpa_driver_wext_scan(void *priv, const u8 *ssid, size_t ssid_len)
1151 {
1152         struct wpa_driver_wext_data *drv = priv;
1153         struct iwreq iwr;
1154         int ret = 0, timeout;
1155         struct iw_scan_req req;
1156
1157         if (ssid_len > IW_ESSID_MAX_SIZE) {
1158                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1159                            __FUNCTION__, (unsigned long) ssid_len);
1160                 return -1;
1161         }
1162
1163         os_memset(&iwr, 0, sizeof(iwr));
1164         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1165
1166         if (ssid && ssid_len) {
1167                 os_memset(&req, 0, sizeof(req));
1168                 req.essid_len = ssid_len;
1169                 req.bssid.sa_family = ARPHRD_ETHER;
1170                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1171                 os_memcpy(req.essid, ssid, ssid_len);
1172                 iwr.u.data.pointer = (caddr_t) &req;
1173                 iwr.u.data.length = sizeof(req);
1174                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1175         }
1176
1177         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1178                 perror("ioctl[SIOCSIWSCAN]");
1179                 ret = -1;
1180         }
1181
1182         /* Not all drivers generate "scan completed" wireless event, so try to
1183          * read results after a timeout. */
1184         timeout = 5;
1185         if (drv->scan_complete_events) {
1186                 /*
1187                  * The driver seems to deliver SIOCGIWSCAN events to notify
1188                  * when scan is complete, so use longer timeout to avoid race
1189                  * conditions with scanning and following association request.
1190                  */
1191                 timeout = 30;
1192         }
1193         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1194                    "seconds", ret, timeout);
1195         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1196         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1197                                drv->ctx);
1198
1199         return ret;
1200 }
1201
1202
1203 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1204                                     size_t *len)
1205 {
1206         struct iwreq iwr;
1207         u8 *res_buf;
1208         size_t res_buf_len;
1209
1210         res_buf_len = IW_SCAN_MAX_DATA;
1211         for (;;) {
1212                 res_buf = os_malloc(res_buf_len);
1213                 if (res_buf == NULL)
1214                         return NULL;
1215                 os_memset(&iwr, 0, sizeof(iwr));
1216                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1217                 iwr.u.data.pointer = res_buf;
1218                 iwr.u.data.length = res_buf_len;
1219
1220                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1221                         break;
1222
1223                 if (errno == E2BIG && res_buf_len < 100000) {
1224                         os_free(res_buf);
1225                         res_buf = NULL;
1226                         res_buf_len *= 2;
1227                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1228                                    "trying larger buffer (%lu bytes)",
1229                                    (unsigned long) res_buf_len);
1230                 } else {
1231                         perror("ioctl[SIOCGIWSCAN]");
1232                         os_free(res_buf);
1233                         return NULL;
1234                 }
1235         }
1236
1237         if (iwr.u.data.length > res_buf_len) {
1238                 os_free(res_buf);
1239                 return NULL;
1240         }
1241         *len = iwr.u.data.length;
1242
1243         return res_buf;
1244 }
1245
1246
1247 /*
1248  * Data structure for collecting WEXT scan results. This is needed to allow
1249  * the various methods of reporting IEs to be combined into a single IE buffer.
1250  */
1251 struct wext_scan_data {
1252         struct wpa_scan_res res;
1253         u8 *ie;
1254         size_t ie_len;
1255         u8 ssid[32];
1256         size_t ssid_len;
1257         int maxrate;
1258 };
1259
1260
1261 static void wext_get_scan_mode(struct iw_event *iwe,
1262                                struct wext_scan_data *res)
1263 {
1264         if (iwe->u.mode == IW_MODE_ADHOC)
1265                 res->res.caps |= IEEE80211_CAP_IBSS;
1266         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1267                 res->res.caps |= IEEE80211_CAP_ESS;
1268 }
1269
1270
1271 static void wext_get_scan_ssid(struct iw_event *iwe,
1272                                struct wext_scan_data *res, char *custom,
1273                                char *end)
1274 {
1275         int ssid_len = iwe->u.essid.length;
1276         if (custom + ssid_len > end)
1277                 return;
1278         if (iwe->u.essid.flags &&
1279             ssid_len > 0 &&
1280             ssid_len <= IW_ESSID_MAX_SIZE) {
1281                 os_memcpy(res->ssid, custom, ssid_len);
1282                 res->ssid_len = ssid_len;
1283         }
1284 }
1285
1286
1287 static void wext_get_scan_freq(struct iw_event *iwe,
1288                                struct wext_scan_data *res)
1289 {
1290         int divi = 1000000, i;
1291
1292         if (iwe->u.freq.e == 0) {
1293                 /*
1294                  * Some drivers do not report frequency, but a channel.
1295                  * Try to map this to frequency by assuming they are using
1296                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1297                  * frequency if the driver sends both frequency and channel,
1298                  * since the driver may be sending an A-band channel that we
1299                  * don't handle here.
1300                  */
1301
1302                 if (res->res.freq)
1303                         return;
1304
1305                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1306                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1307                         return;
1308                 } else if (iwe->u.freq.m == 14) {
1309                         res->res.freq = 2484;
1310                         return;
1311                 }
1312         }
1313
1314         if (iwe->u.freq.e > 6) {
1315                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1316                            MACSTR " m=%d e=%d)",
1317                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1318                            iwe->u.freq.e);
1319                 return;
1320         }
1321
1322         for (i = 0; i < iwe->u.freq.e; i++)
1323                 divi /= 10;
1324         res->res.freq = iwe->u.freq.m / divi;
1325 }
1326
1327
1328 static void wext_get_scan_qual(struct iw_event *iwe,
1329                                struct wext_scan_data *res)
1330 {
1331         res->res.qual = iwe->u.qual.qual;
1332         res->res.noise = iwe->u.qual.noise;
1333         res->res.level = iwe->u.qual.level;
1334 }
1335
1336
1337 static void wext_get_scan_encode(struct iw_event *iwe,
1338                                  struct wext_scan_data *res)
1339 {
1340         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1341                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1342 }
1343
1344
1345 static void wext_get_scan_rate(struct iw_event *iwe,
1346                                struct wext_scan_data *res, char *pos,
1347                                char *end)
1348 {
1349         int maxrate;
1350         char *custom = pos + IW_EV_LCP_LEN;
1351         struct iw_param p;
1352         size_t clen;
1353
1354         clen = iwe->len;
1355         if (custom + clen > end)
1356                 return;
1357         maxrate = 0;
1358         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1359                 /* Note: may be misaligned, make a local, aligned copy */
1360                 os_memcpy(&p, custom, sizeof(struct iw_param));
1361                 if (p.value > maxrate)
1362                         maxrate = p.value;
1363                 clen -= sizeof(struct iw_param);
1364                 custom += sizeof(struct iw_param);
1365         }
1366         res->maxrate = maxrate;
1367 }
1368
1369
1370 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1371                                     struct wext_scan_data *res, char *custom,
1372                                     char *end)
1373 {
1374         char *genie, *gpos, *gend;
1375         u8 *tmp;
1376
1377         gpos = genie = custom;
1378         gend = genie + iwe->u.data.length;
1379         if (gend > end) {
1380                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1381                 return;
1382         }
1383
1384         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1385         if (tmp == NULL)
1386                 return;
1387         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1388         res->ie = tmp;
1389         res->ie_len += gend - gpos;
1390 }
1391
1392
1393 static void wext_get_scan_custom(struct iw_event *iwe,
1394                                  struct wext_scan_data *res, char *custom,
1395                                  char *end)
1396 {
1397         size_t clen;
1398         u8 *tmp;
1399
1400         clen = iwe->u.data.length;
1401         if (custom + clen > end)
1402                 return;
1403
1404         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1405                 char *spos;
1406                 int bytes;
1407                 spos = custom + 7;
1408                 bytes = custom + clen - spos;
1409                 if (bytes & 1)
1410                         return;
1411                 bytes /= 2;
1412                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1413                 if (tmp == NULL)
1414                         return;
1415                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1416                 res->ie = tmp;
1417                 res->ie_len += bytes;
1418         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1419                 char *spos;
1420                 int bytes;
1421                 spos = custom + 7;
1422                 bytes = custom + clen - spos;
1423                 if (bytes & 1)
1424                         return;
1425                 bytes /= 2;
1426                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1427                 if (tmp == NULL)
1428                         return;
1429                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1430                 res->ie = tmp;
1431                 res->ie_len += bytes;
1432         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1433                 char *spos;
1434                 int bytes;
1435                 u8 bin[8];
1436                 spos = custom + 4;
1437                 bytes = custom + clen - spos;
1438                 if (bytes != 16) {
1439                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1440                         return;
1441                 }
1442                 bytes /= 2;
1443                 hexstr2bin(spos, bin, bytes);
1444                 res->res.tsf += WPA_GET_BE64(bin);
1445         }
1446 }
1447
1448
1449 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1450 {
1451         return drv->we_version_compiled > 18 &&
1452                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1453                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1454 }
1455
1456
1457 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1458                                            struct wext_scan_data *data)
1459 {
1460         struct wpa_scan_res **tmp;
1461         struct wpa_scan_res *r;
1462         size_t extra_len;
1463         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1464
1465         /* Figure out whether we need to fake any IEs */
1466         pos = data->ie;
1467         end = pos + data->ie_len;
1468         while (pos && pos + 1 < end) {
1469                 if (pos + 2 + pos[1] > end)
1470                         break;
1471                 if (pos[0] == WLAN_EID_SSID)
1472                         ssid_ie = pos;
1473                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1474                         rate_ie = pos;
1475                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1476                         rate_ie = pos;
1477                 pos += 2 + pos[1];
1478         }
1479
1480         extra_len = 0;
1481         if (ssid_ie == NULL)
1482                 extra_len += 2 + data->ssid_len;
1483         if (rate_ie == NULL && data->maxrate)
1484                 extra_len += 3;
1485
1486         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1487         if (r == NULL)
1488                 return;
1489         os_memcpy(r, &data->res, sizeof(*r));
1490         r->ie_len = extra_len + data->ie_len;
1491         pos = (u8 *) (r + 1);
1492         if (ssid_ie == NULL) {
1493                 /*
1494                  * Generate a fake SSID IE since the driver did not report
1495                  * a full IE list.
1496                  */
1497                 *pos++ = WLAN_EID_SSID;
1498                 *pos++ = data->ssid_len;
1499                 os_memcpy(pos, data->ssid, data->ssid_len);
1500                 pos += data->ssid_len;
1501         }
1502         if (rate_ie == NULL && data->maxrate) {
1503                 /*
1504                  * Generate a fake Supported Rates IE since the driver did not
1505                  * report a full IE list.
1506                  */
1507                 *pos++ = WLAN_EID_SUPP_RATES;
1508                 *pos++ = 1;
1509                 *pos++ = data->maxrate;
1510         }
1511         if (data->ie)
1512                 os_memcpy(pos, data->ie, data->ie_len);
1513
1514         tmp = os_realloc(res->res,
1515                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1516         if (tmp == NULL) {
1517                 os_free(r);
1518                 return;
1519         }
1520         tmp[res->num++] = r;
1521         res->res = tmp;
1522 }
1523
1524
1525 /**
1526  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1527  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1528  * Returns: Scan results on success, -1 on failure
1529  */
1530 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1531 {
1532         struct wpa_driver_wext_data *drv = priv;
1533         size_t ap_num = 0, len;
1534         int first;
1535         u8 *res_buf;
1536         struct iw_event iwe_buf, *iwe = &iwe_buf;
1537         char *pos, *end, *custom;
1538         struct wpa_scan_results *res;
1539         struct wext_scan_data data;
1540
1541         res_buf = wpa_driver_wext_giwscan(drv, &len);
1542         if (res_buf == NULL)
1543                 return NULL;
1544
1545         ap_num = 0;
1546         first = 1;
1547
1548         res = os_zalloc(sizeof(*res));
1549         if (res == NULL) {
1550                 os_free(res_buf);
1551                 return NULL;
1552         }
1553
1554         pos = (char *) res_buf;
1555         end = (char *) res_buf + len;
1556         os_memset(&data, 0, sizeof(data));
1557
1558         while (pos + IW_EV_LCP_LEN <= end) {
1559                 /* Event data may be unaligned, so make a local, aligned copy
1560                  * before processing. */
1561                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1562                 if (iwe->len <= IW_EV_LCP_LEN)
1563                         break;
1564
1565                 custom = pos + IW_EV_POINT_LEN;
1566                 if (wext_19_iw_point(drv, iwe->cmd)) {
1567                         /* WE-19 removed the pointer from struct iw_point */
1568                         char *dpos = (char *) &iwe_buf.u.data.length;
1569                         int dlen = dpos - (char *) &iwe_buf;
1570                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1571                                   sizeof(struct iw_event) - dlen);
1572                 } else {
1573                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1574                         custom += IW_EV_POINT_OFF;
1575                 }
1576
1577                 switch (iwe->cmd) {
1578                 case SIOCGIWAP:
1579                         if (!first)
1580                                 wpa_driver_wext_add_scan_entry(res, &data);
1581                         first = 0;
1582                         os_free(data.ie);
1583                         os_memset(&data, 0, sizeof(data));
1584                         os_memcpy(data.res.bssid,
1585                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1586                         break;
1587                 case SIOCGIWMODE:
1588                         wext_get_scan_mode(iwe, &data);
1589                         break;
1590                 case SIOCGIWESSID:
1591                         wext_get_scan_ssid(iwe, &data, custom, end);
1592                         break;
1593                 case SIOCGIWFREQ:
1594                         wext_get_scan_freq(iwe, &data);
1595                         break;
1596                 case IWEVQUAL:
1597                         wext_get_scan_qual(iwe, &data);
1598                         break;
1599                 case SIOCGIWENCODE:
1600                         wext_get_scan_encode(iwe, &data);
1601                         break;
1602                 case SIOCGIWRATE:
1603                         wext_get_scan_rate(iwe, &data, pos, end);
1604                         break;
1605                 case IWEVGENIE:
1606                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1607                         break;
1608                 case IWEVCUSTOM:
1609                         wext_get_scan_custom(iwe, &data, custom, end);
1610                         break;
1611                 }
1612
1613                 pos += iwe->len;
1614         }
1615         os_free(res_buf);
1616         res_buf = NULL;
1617         if (!first)
1618                 wpa_driver_wext_add_scan_entry(res, &data);
1619         os_free(data.ie);
1620
1621         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1622                    (unsigned long) len, (unsigned long) res->num);
1623
1624         return res;
1625 }
1626
1627
1628 static int wpa_driver_wext_get_range(void *priv)
1629 {
1630         struct wpa_driver_wext_data *drv = priv;
1631         struct iw_range *range;
1632         struct iwreq iwr;
1633         int minlen;
1634         size_t buflen;
1635
1636         /*
1637          * Use larger buffer than struct iw_range in order to allow the
1638          * structure to grow in the future.
1639          */
1640         buflen = sizeof(struct iw_range) + 500;
1641         range = os_zalloc(buflen);
1642         if (range == NULL)
1643                 return -1;
1644
1645         os_memset(&iwr, 0, sizeof(iwr));
1646         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1647         iwr.u.data.pointer = (caddr_t) range;
1648         iwr.u.data.length = buflen;
1649
1650         minlen = ((char *) &range->enc_capa) - (char *) range +
1651                 sizeof(range->enc_capa);
1652
1653         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1654                 perror("ioctl[SIOCGIWRANGE]");
1655                 os_free(range);
1656                 return -1;
1657         } else if (iwr.u.data.length >= minlen &&
1658                    range->we_version_compiled >= 18) {
1659                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1660                            "WE(source)=%d enc_capa=0x%x",
1661                            range->we_version_compiled,
1662                            range->we_version_source,
1663                            range->enc_capa);
1664                 drv->has_capability = 1;
1665                 drv->we_version_compiled = range->we_version_compiled;
1666                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1667                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1668                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1669                 }
1670                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1671                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1672                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1673                 }
1674                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1675                         WPA_DRIVER_CAPA_ENC_WEP104;
1676                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1677                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1678                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1679                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1680                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
1681                            drv->capa.key_mgmt, drv->capa.enc);
1682         } else {
1683                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1684                            "assuming WPA is not supported");
1685         }
1686
1687         os_free(range);
1688         return 0;
1689 }
1690
1691
1692 static int wpa_driver_wext_set_wpa(void *priv, int enabled)
1693 {
1694         struct wpa_driver_wext_data *drv = priv;
1695         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1696
1697         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1698                                               enabled);
1699 }
1700
1701
1702 static int wpa_driver_wext_set_key_ext(void *priv, wpa_alg alg,
1703                                        const u8 *addr, int key_idx,
1704                                        int set_tx, const u8 *seq,
1705                                        size_t seq_len,
1706                                        const u8 *key, size_t key_len)
1707 {
1708         struct wpa_driver_wext_data *drv = priv;
1709         struct iwreq iwr;
1710         int ret = 0;
1711         struct iw_encode_ext *ext;
1712
1713         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1714                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1715                            __FUNCTION__, (unsigned long) seq_len);
1716                 return -1;
1717         }
1718
1719         ext = os_zalloc(sizeof(*ext) + key_len);
1720         if (ext == NULL)
1721                 return -1;
1722         os_memset(&iwr, 0, sizeof(iwr));
1723         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1724         iwr.u.encoding.flags = key_idx + 1;
1725         if (alg == WPA_ALG_NONE)
1726                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1727         iwr.u.encoding.pointer = (caddr_t) ext;
1728         iwr.u.encoding.length = sizeof(*ext) + key_len;
1729
1730         if (addr == NULL ||
1731             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1732                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1733         if (set_tx)
1734                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1735
1736         ext->addr.sa_family = ARPHRD_ETHER;
1737         if (addr)
1738                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1739         else
1740                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1741         if (key && key_len) {
1742                 os_memcpy(ext + 1, key, key_len);
1743                 ext->key_len = key_len;
1744         }
1745         switch (alg) {
1746         case WPA_ALG_NONE:
1747                 ext->alg = IW_ENCODE_ALG_NONE;
1748                 break;
1749         case WPA_ALG_WEP:
1750                 ext->alg = IW_ENCODE_ALG_WEP;
1751                 break;
1752         case WPA_ALG_TKIP:
1753                 ext->alg = IW_ENCODE_ALG_TKIP;
1754                 break;
1755         case WPA_ALG_CCMP:
1756                 ext->alg = IW_ENCODE_ALG_CCMP;
1757                 break;
1758         default:
1759                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1760                            __FUNCTION__, alg);
1761                 os_free(ext);
1762                 return -1;
1763         }
1764
1765         if (seq && seq_len) {
1766                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1767                 os_memcpy(ext->rx_seq, seq, seq_len);
1768         }
1769
1770         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1771                 ret = errno == EOPNOTSUPP ? -2 : -1;
1772                 if (errno == ENODEV) {
1773                         /*
1774                          * ndiswrapper seems to be returning incorrect error
1775                          * code.. */
1776                         ret = -2;
1777                 }
1778
1779                 perror("ioctl[SIOCSIWENCODEEXT]");
1780         }
1781
1782         os_free(ext);
1783         return ret;
1784 }
1785
1786
1787 /**
1788  * wpa_driver_wext_set_key - Configure encryption key
1789  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1790  * @priv: Private driver interface data
1791  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1792  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1793  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1794  *      broadcast/default keys
1795  * @key_idx: key index (0..3), usually 0 for unicast keys
1796  * @set_tx: Configure this key as the default Tx key (only used when
1797  *      driver does not support separate unicast/individual key
1798  * @seq: Sequence number/packet number, seq_len octets, the next
1799  *      packet number to be used for in replay protection; configured
1800  *      for Rx keys (in most cases, this is only used with broadcast
1801  *      keys and set to zero for unicast keys)
1802  * @seq_len: Length of the seq, depends on the algorithm:
1803  *      TKIP: 6 octets, CCMP: 6 octets
1804  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1805  *      8-byte Rx Mic Key
1806  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1807  *      TKIP: 32, CCMP: 16)
1808  * Returns: 0 on success, -1 on failure
1809  *
1810  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1811  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1812  */
1813 int wpa_driver_wext_set_key(void *priv, wpa_alg alg,
1814                             const u8 *addr, int key_idx,
1815                             int set_tx, const u8 *seq, size_t seq_len,
1816                             const u8 *key, size_t key_len)
1817 {
1818         struct wpa_driver_wext_data *drv = priv;
1819         struct iwreq iwr;
1820         int ret = 0;
1821
1822         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1823                    "key_len=%lu",
1824                    __FUNCTION__, alg, key_idx, set_tx,
1825                    (unsigned long) seq_len, (unsigned long) key_len);
1826
1827         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1828                                           seq, seq_len, key, key_len);
1829         if (ret == 0)
1830                 return 0;
1831
1832         if (ret == -2 &&
1833             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1834                 wpa_printf(MSG_DEBUG, "Driver did not support "
1835                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1836                 ret = 0;
1837         } else {
1838                 wpa_printf(MSG_DEBUG, "Driver did not support "
1839                            "SIOCSIWENCODEEXT");
1840                 return ret;
1841         }
1842
1843         os_memset(&iwr, 0, sizeof(iwr));
1844         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1845         iwr.u.encoding.flags = key_idx + 1;
1846         if (alg == WPA_ALG_NONE)
1847                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1848         iwr.u.encoding.pointer = (caddr_t) key;
1849         iwr.u.encoding.length = key_len;
1850
1851         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1852                 perror("ioctl[SIOCSIWENCODE]");
1853                 ret = -1;
1854         }
1855
1856         if (set_tx && alg != WPA_ALG_NONE) {
1857                 os_memset(&iwr, 0, sizeof(iwr));
1858                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1859                 iwr.u.encoding.flags = key_idx + 1;
1860                 iwr.u.encoding.pointer = (caddr_t) NULL;
1861                 iwr.u.encoding.length = 0;
1862                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1863                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1864                         ret = -1;
1865                 }
1866         }
1867
1868         return ret;
1869 }
1870
1871
1872 static int wpa_driver_wext_set_countermeasures(void *priv,
1873                                                int enabled)
1874 {
1875         struct wpa_driver_wext_data *drv = priv;
1876         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1877         return wpa_driver_wext_set_auth_param(drv,
1878                                               IW_AUTH_TKIP_COUNTERMEASURES,
1879                                               enabled);
1880 }
1881
1882
1883 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1884                                                 int enabled)
1885 {
1886         struct wpa_driver_wext_data *drv = priv;
1887         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1888         drv->use_crypt = enabled;
1889         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1890                                               enabled);
1891 }
1892
1893
1894 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1895                                 const u8 *addr, int cmd, int reason_code)
1896 {
1897         struct iwreq iwr;
1898         struct iw_mlme mlme;
1899         int ret = 0;
1900
1901         os_memset(&iwr, 0, sizeof(iwr));
1902         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1903         os_memset(&mlme, 0, sizeof(mlme));
1904         mlme.cmd = cmd;
1905         mlme.reason_code = reason_code;
1906         mlme.addr.sa_family = ARPHRD_ETHER;
1907         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1908         iwr.u.data.pointer = (caddr_t) &mlme;
1909         iwr.u.data.length = sizeof(mlme);
1910
1911         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1912                 perror("ioctl[SIOCSIWMLME]");
1913                 ret = -1;
1914         }
1915
1916         return ret;
1917 }
1918
1919
1920 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1921                                           int reason_code)
1922 {
1923         struct wpa_driver_wext_data *drv = priv;
1924         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1925         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1926 }
1927
1928
1929 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
1930                                         int reason_code)
1931 {
1932         struct wpa_driver_wext_data *drv = priv;
1933         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1934         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC,
1935                                     reason_code);
1936 }
1937
1938
1939 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
1940                                       size_t ie_len)
1941 {
1942         struct wpa_driver_wext_data *drv = priv;
1943         struct iwreq iwr;
1944         int ret = 0;
1945
1946         os_memset(&iwr, 0, sizeof(iwr));
1947         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1948         iwr.u.data.pointer = (caddr_t) ie;
1949         iwr.u.data.length = ie_len;
1950
1951         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1952                 perror("ioctl[SIOCSIWGENIE]");
1953                 ret = -1;
1954         }
1955
1956         return ret;
1957 }
1958
1959
1960 int wpa_driver_wext_cipher2wext(int cipher)
1961 {
1962         switch (cipher) {
1963         case CIPHER_NONE:
1964                 return IW_AUTH_CIPHER_NONE;
1965         case CIPHER_WEP40:
1966                 return IW_AUTH_CIPHER_WEP40;
1967         case CIPHER_TKIP:
1968                 return IW_AUTH_CIPHER_TKIP;
1969         case CIPHER_CCMP:
1970                 return IW_AUTH_CIPHER_CCMP;
1971         case CIPHER_WEP104:
1972                 return IW_AUTH_CIPHER_WEP104;
1973         default:
1974                 return 0;
1975         }
1976 }
1977
1978
1979 int wpa_driver_wext_keymgmt2wext(int keymgmt)
1980 {
1981         switch (keymgmt) {
1982         case KEY_MGMT_802_1X:
1983         case KEY_MGMT_802_1X_NO_WPA:
1984                 return IW_AUTH_KEY_MGMT_802_1X;
1985         case KEY_MGMT_PSK:
1986                 return IW_AUTH_KEY_MGMT_PSK;
1987         default:
1988                 return 0;
1989         }
1990 }
1991
1992
1993 static int
1994 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
1995                                   struct wpa_driver_associate_params *params)
1996 {
1997         struct iwreq iwr;
1998         int ret = 0;
1999
2000         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2001                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2002
2003         os_memset(&iwr, 0, sizeof(iwr));
2004         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2005         /* Just changing mode, not actual keys */
2006         iwr.u.encoding.flags = 0;
2007         iwr.u.encoding.pointer = (caddr_t) NULL;
2008         iwr.u.encoding.length = 0;
2009
2010         /*
2011          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2012          * different things. Here they are used to indicate Open System vs.
2013          * Shared Key authentication algorithm. However, some drivers may use
2014          * them to select between open/restricted WEP encrypted (open = allow
2015          * both unencrypted and encrypted frames; restricted = only allow
2016          * encrypted frames).
2017          */
2018
2019         if (!drv->use_crypt) {
2020                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2021         } else {
2022                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2023                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2024                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2025                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2026         }
2027
2028         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2029                 perror("ioctl[SIOCSIWENCODE]");
2030                 ret = -1;
2031         }
2032
2033         return ret;
2034 }
2035
2036
2037 int wpa_driver_wext_associate(void *priv,
2038                               struct wpa_driver_associate_params *params)
2039 {
2040         struct wpa_driver_wext_data *drv = priv;
2041         int ret = 0;
2042         int allow_unencrypted_eapol;
2043         int value;
2044
2045         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2046
2047         /*
2048          * If the driver did not support SIOCSIWAUTH, fallback to
2049          * SIOCSIWENCODE here.
2050          */
2051         if (drv->auth_alg_fallback &&
2052             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2053                 ret = -1;
2054
2055         if (!params->bssid &&
2056             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2057                 ret = -1;
2058
2059         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2060                 ret = -1;
2061         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2062          * from configuration, not from here, where only the selected suite is
2063          * available */
2064         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2065             < 0)
2066                 ret = -1;
2067         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2068                 value = IW_AUTH_WPA_VERSION_DISABLED;
2069         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2070                 value = IW_AUTH_WPA_VERSION_WPA2;
2071         else
2072                 value = IW_AUTH_WPA_VERSION_WPA;
2073         if (wpa_driver_wext_set_auth_param(drv,
2074                                            IW_AUTH_WPA_VERSION, value) < 0)
2075                 ret = -1;
2076         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2077         if (wpa_driver_wext_set_auth_param(drv,
2078                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2079                 ret = -1;
2080         value = wpa_driver_wext_cipher2wext(params->group_suite);
2081         if (wpa_driver_wext_set_auth_param(drv,
2082                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2083                 ret = -1;
2084         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2085         if (wpa_driver_wext_set_auth_param(drv,
2086                                            IW_AUTH_KEY_MGMT, value) < 0)
2087                 ret = -1;
2088         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2089                 params->pairwise_suite != CIPHER_NONE ||
2090                 params->group_suite != CIPHER_NONE ||
2091                 params->wpa_ie_len;
2092         if (wpa_driver_wext_set_auth_param(drv,
2093                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2094                 ret = -1;
2095
2096         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2097          * not using WPA. IEEE 802.1X specifies that these frames are not
2098          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2099         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2100             params->key_mgmt_suite == KEY_MGMT_PSK)
2101                 allow_unencrypted_eapol = 0;
2102         else
2103                 allow_unencrypted_eapol = 1;
2104
2105         if (wpa_driver_wext_set_auth_param(drv,
2106                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2107                                            allow_unencrypted_eapol) < 0)
2108                 ret = -1;
2109         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2110                 ret = -1;
2111         if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2112                 ret = -1;
2113         if (params->bssid &&
2114             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2115                 ret = -1;
2116
2117         return ret;
2118 }
2119
2120
2121 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2122 {
2123         struct wpa_driver_wext_data *drv = priv;
2124         int algs = 0, res;
2125
2126         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2127                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2128         if (auth_alg & AUTH_ALG_SHARED_KEY)
2129                 algs |= IW_AUTH_ALG_SHARED_KEY;
2130         if (auth_alg & AUTH_ALG_LEAP)
2131                 algs |= IW_AUTH_ALG_LEAP;
2132         if (algs == 0) {
2133                 /* at least one algorithm should be set */
2134                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2135         }
2136
2137         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2138                                              algs);
2139         drv->auth_alg_fallback = res == -2;
2140         return res;
2141 }
2142
2143
2144 /**
2145  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2146  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2147  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2148  * Returns: 0 on success, -1 on failure
2149  */
2150 int wpa_driver_wext_set_mode(void *priv, int mode)
2151 {
2152         struct wpa_driver_wext_data *drv = priv;
2153         struct iwreq iwr;
2154         int ret = -1, flags;
2155         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2156
2157         os_memset(&iwr, 0, sizeof(iwr));
2158         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2159         iwr.u.mode = new_mode;
2160         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2161                 ret = 0;
2162                 goto done;
2163         }
2164
2165         if (errno != EBUSY) {
2166                 perror("ioctl[SIOCSIWMODE]");
2167                 goto done;
2168         }
2169
2170         /* mac80211 doesn't allow mode changes while the device is up, so if
2171          * the device isn't in the mode we're about to change to, take device
2172          * down, try to set the mode again, and bring it back up.
2173          */
2174         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2175                 perror("ioctl[SIOCGIWMODE]");
2176                 goto done;
2177         }
2178
2179         if (iwr.u.mode == new_mode) {
2180                 ret = 0;
2181                 goto done;
2182         }
2183
2184         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2185                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2186
2187                 /* Try to set the mode again while the interface is down */
2188                 iwr.u.mode = new_mode;
2189                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2190                         perror("ioctl[SIOCSIWMODE]");
2191                 else
2192                         ret = 0;
2193
2194                 /* Ignore return value of get_ifflags to ensure that the device
2195                  * is always up like it was before this function was called.
2196                  */
2197                 (void) wpa_driver_wext_get_ifflags(drv, &flags);
2198                 (void) wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2199         }
2200
2201 done:
2202         return ret;
2203 }
2204
2205
2206 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2207                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2208 {
2209         struct iwreq iwr;
2210         struct iw_pmksa pmksa;
2211         int ret = 0;
2212
2213         os_memset(&iwr, 0, sizeof(iwr));
2214         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2215         os_memset(&pmksa, 0, sizeof(pmksa));
2216         pmksa.cmd = cmd;
2217         pmksa.bssid.sa_family = ARPHRD_ETHER;
2218         if (bssid)
2219                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2220         if (pmkid)
2221                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2222         iwr.u.data.pointer = (caddr_t) &pmksa;
2223         iwr.u.data.length = sizeof(pmksa);
2224
2225         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2226                 if (errno != EOPNOTSUPP)
2227                         perror("ioctl[SIOCSIWPMKSA]");
2228                 ret = -1;
2229         }
2230
2231         return ret;
2232 }
2233
2234
2235 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2236                                      const u8 *pmkid)
2237 {
2238         struct wpa_driver_wext_data *drv = priv;
2239         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2240 }
2241
2242
2243 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2244                                         const u8 *pmkid)
2245 {
2246         struct wpa_driver_wext_data *drv = priv;
2247         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2248 }
2249
2250
2251 static int wpa_driver_wext_flush_pmkid(void *priv)
2252 {
2253         struct wpa_driver_wext_data *drv = priv;
2254         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2255 }
2256
2257
2258 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2259 {
2260         struct wpa_driver_wext_data *drv = priv;
2261         if (!drv->has_capability)
2262                 return -1;
2263         os_memcpy(capa, &drv->capa, sizeof(*capa));
2264         return 0;
2265 }
2266
2267
2268 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2269                                         const char *ifname)
2270 {
2271         if (ifname == NULL) {
2272                 drv->ifindex2 = -1;
2273                 return 0;
2274         }
2275
2276         drv->ifindex2 = if_nametoindex(ifname);
2277         if (drv->ifindex2 <= 0)
2278                 return -1;
2279
2280         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2281                    "wireless events", drv->ifindex2, ifname);
2282
2283         return 0;
2284 }
2285
2286
2287 int wpa_driver_wext_set_operstate(void *priv, int state)
2288 {
2289         struct wpa_driver_wext_data *drv = priv;
2290
2291         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2292                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2293         drv->operstate = state;
2294         return wpa_driver_wext_send_oper_ifla(
2295                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2296 }
2297
2298
2299 #ifdef CONFIG_CLIENT_MLME
2300 static int hostapd_ioctl(struct wpa_driver_wext_data *drv,
2301                          struct prism2_hostapd_param *param, int len)
2302 {
2303         struct iwreq iwr;
2304
2305         os_memset(&iwr, 0, sizeof(iwr));
2306         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2307         iwr.u.data.pointer = (caddr_t) param;
2308         iwr.u.data.length = len;
2309
2310         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
2311                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2312                 return -1;
2313         }
2314
2315         return 0;
2316 }
2317
2318
2319 static struct wpa_hw_modes *
2320 wpa_driver_wext_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2321 {
2322         struct wpa_driver_wext_data *drv = priv;
2323         struct prism2_hostapd_param *param;
2324         u8 *pos, *end;
2325         struct wpa_hw_modes *modes = NULL;
2326         int i;
2327
2328         param = os_zalloc(PRISM2_HOSTAPD_MAX_BUF_SIZE);
2329         if (param == NULL)
2330                 return NULL;
2331         param->cmd = PRISM2_HOSTAPD_GET_HW_FEATURES;
2332
2333         if (hostapd_ioctl(drv, param, PRISM2_HOSTAPD_MAX_BUF_SIZE) < 0) {
2334                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2335                 goto out;
2336         }
2337
2338         *num_modes = param->u.hw_features.num_modes;
2339         *flags = param->u.hw_features.flags;
2340
2341         pos = param->u.hw_features.data;
2342         end = pos + PRISM2_HOSTAPD_MAX_BUF_SIZE -
2343                 (param->u.hw_features.data - (u8 *) param);
2344
2345         modes = os_zalloc(*num_modes * sizeof(struct wpa_hw_modes));
2346         if (modes == NULL)
2347                 goto out;
2348
2349         for (i = 0; i < *num_modes; i++) {
2350                 struct hostapd_ioctl_hw_modes_hdr *hdr;
2351                 struct wpa_hw_modes *feature;
2352                 int clen, rlen;
2353
2354                 hdr = (struct hostapd_ioctl_hw_modes_hdr *) pos;
2355                 pos = (u8 *) (hdr + 1);
2356                 clen = hdr->num_channels * sizeof(struct wpa_channel_data);
2357                 rlen = hdr->num_rates * sizeof(struct wpa_rate_data);
2358
2359                 feature = &modes[i];
2360                 switch (hdr->mode) {
2361                 case MODE_IEEE80211A:
2362                         feature->mode = WPA_MODE_IEEE80211A;
2363                         break;
2364                 case MODE_IEEE80211B:
2365                         feature->mode = WPA_MODE_IEEE80211B;
2366                         break;
2367                 case MODE_IEEE80211G:
2368                         feature->mode = WPA_MODE_IEEE80211G;
2369                         break;
2370                 case MODE_ATHEROS_TURBO:
2371                 case MODE_ATHEROS_TURBOG:
2372                         wpa_printf(MSG_ERROR, "Skip unsupported hw_mode=%d in "
2373                                    "get_hw_features data", hdr->mode);
2374                         pos += clen + rlen;
2375                         continue;
2376                 default:
2377                         wpa_printf(MSG_ERROR, "Unknown hw_mode=%d in "
2378                                    "get_hw_features data", hdr->mode);
2379                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2380                         modes = NULL;
2381                         break;
2382                 }
2383                 feature->num_channels = hdr->num_channels;
2384                 feature->num_rates = hdr->num_rates;
2385
2386                 feature->channels = os_malloc(clen);
2387                 feature->rates = os_malloc(rlen);
2388                 if (!feature->channels || !feature->rates ||
2389                     pos + clen + rlen > end) {
2390                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2391                         modes = NULL;
2392                         break;
2393                 }
2394
2395                 os_memcpy(feature->channels, pos, clen);
2396                 pos += clen;
2397                 os_memcpy(feature->rates, pos, rlen);
2398                 pos += rlen;
2399         }
2400
2401 out:
2402         os_free(param);
2403         return modes;
2404 }
2405
2406
2407 int wpa_driver_wext_set_channel(void *priv, wpa_hw_mode phymode, int chan,
2408                                 int freq)
2409 {
2410         return wpa_driver_wext_set_freq(priv, freq);
2411 }
2412
2413
2414 static void wpa_driver_wext_mlme_read(int sock, void *eloop_ctx,
2415                                       void *sock_ctx)
2416 {
2417         struct wpa_driver_wext_data *drv = eloop_ctx;
2418         int len;
2419         unsigned char buf[3000];
2420         struct ieee80211_frame_info *fi;
2421         struct ieee80211_rx_status rx_status;
2422
2423         len = recv(sock, buf, sizeof(buf), 0);
2424         if (len < 0) {
2425                 perror("recv[MLME]");
2426                 return;
2427         }
2428
2429         if (len < (int) sizeof(struct ieee80211_frame_info)) {
2430                 wpa_printf(MSG_DEBUG, "WEXT: Too short MLME frame (len=%d)",
2431                            len);
2432                 return;
2433         }
2434
2435         fi = (struct ieee80211_frame_info *) buf;
2436         if (ntohl(fi->version) != IEEE80211_FI_VERSION) {
2437                 wpa_printf(MSG_DEBUG, "WEXT: Invalid MLME frame info version "
2438                            "0x%x", ntohl(fi->version));
2439                 return;
2440         }
2441
2442         os_memset(&rx_status, 0, sizeof(rx_status));
2443         rx_status.ssi = ntohl(fi->ssi_signal);
2444         rx_status.channel = ntohl(fi->channel);
2445
2446         wpa_supplicant_sta_rx(drv->ctx,
2447                               buf + sizeof(struct ieee80211_frame_info),
2448                               len - sizeof(struct ieee80211_frame_info),
2449                               &rx_status);
2450 }
2451
2452
2453 static int wpa_driver_wext_open_mlme(struct wpa_driver_wext_data *drv)
2454 {
2455         int flags, ifindex, s;
2456         struct sockaddr_ll addr;
2457         struct ifreq ifr;
2458
2459         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_USER_SPACE_MLME, 1) <
2460             0) {
2461                 wpa_printf(MSG_ERROR, "WEXT: Failed to configure driver to "
2462                            "use user space MLME");
2463                 return -1;
2464         }
2465
2466         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_MGMT_IF, 1) < 0) {
2467                 wpa_printf(MSG_ERROR, "WEXT: Failed to add management "
2468                            "interface for user space MLME");
2469                 return -1;
2470         }
2471
2472         ifindex = wpa_driver_prism2_param_get(drv, PRISM2_PARAM_MGMT_IF);
2473         if (ifindex <= 0) {
2474                 wpa_printf(MSG_ERROR, "WEXT: MLME management device not "
2475                            "found");
2476                 return -1;
2477         }
2478
2479         os_memset(&ifr, 0, sizeof(ifr));
2480         ifr.ifr_ifindex = ifindex;
2481         if (ioctl(drv->ioctl_sock, SIOCGIFNAME, &ifr) != 0) {
2482                 perror("ioctl(SIOCGIFNAME)");
2483                 return -1;
2484         }
2485         os_strlcpy(drv->mlmedev, ifr.ifr_name, sizeof(drv->mlmedev));
2486         wpa_printf(MSG_DEBUG, "WEXT: MLME management device '%s'",
2487                    drv->mlmedev);
2488
2489         if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev, &flags) != 0
2490             || wpa_driver_wext_set_ifflags_ifname(drv, drv->mlmedev,
2491                                                   flags | IFF_UP) != 0) {
2492                 wpa_printf(MSG_ERROR, "WEXT: Could not set interface "
2493                            "'%s' UP", drv->mlmedev);
2494                 return -1;
2495         }
2496
2497         s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2498         if (s < 0) {
2499                 perror("socket[PF_PACKET,SOCK_RAW]");
2500                 return -1;
2501         }
2502
2503         os_memset(&addr, 0, sizeof(addr));
2504         addr.sll_family = AF_PACKET;
2505         addr.sll_ifindex = ifindex;
2506
2507         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
2508                 perror("bind(MLME)");
2509                 return -1;
2510         }
2511
2512         if (eloop_register_read_sock(s, wpa_driver_wext_mlme_read, drv, NULL))
2513         {
2514                 wpa_printf(MSG_ERROR, "WEXT: Could not register MLME read "
2515                            "socket");
2516                 close(s);
2517                 return -1;
2518         }
2519
2520         return s;
2521 }
2522
2523
2524 static int wpa_driver_wext_send_mlme(void *priv, const u8 *data,
2525                                      size_t data_len)
2526 {
2527         struct wpa_driver_wext_data *drv = priv;
2528         int ret;
2529
2530         ret = send(drv->mlme_sock, data, data_len, 0);
2531         if (ret < 0) {
2532                 perror("send[MLME]");
2533                 return -1;
2534         }
2535
2536         return 0;
2537 }
2538
2539
2540 static int wpa_driver_wext_mlme_add_sta(void *priv, const u8 *addr,
2541                                         const u8 *supp_rates,
2542                                         size_t supp_rates_len)
2543 {
2544         struct wpa_driver_wext_data *drv = priv;
2545         struct prism2_hostapd_param param;
2546         size_t len;
2547
2548         os_memset(&param, 0, sizeof(param));
2549         param.cmd = PRISM2_HOSTAPD_ADD_STA;
2550         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2551         len = supp_rates_len;
2552         if (len > sizeof(param.u.add_sta.supp_rates))
2553                 len = sizeof(param.u.add_sta.supp_rates);
2554         os_memcpy(param.u.add_sta.supp_rates, supp_rates, len);
2555         return hostapd_ioctl(drv, &param, sizeof(param));
2556 }
2557
2558
2559 static int wpa_driver_wext_mlme_remove_sta(void *priv, const u8 *addr)
2560 {
2561         struct wpa_driver_wext_data *drv = priv;
2562         struct prism2_hostapd_param param;
2563
2564         os_memset(&param, 0, sizeof(param));
2565         param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
2566         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2567         return hostapd_ioctl(drv, &param, sizeof(param));
2568 }
2569
2570 #endif /* CONFIG_CLIENT_MLME */
2571
2572
2573 static int wpa_driver_wext_set_param(void *priv, const char *param)
2574 {
2575 #ifdef CONFIG_CLIENT_MLME
2576         struct wpa_driver_wext_data *drv = priv;
2577
2578         if (param == NULL)
2579                 return 0;
2580
2581         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2582
2583         if (os_strstr(param, "use_mlme=1")) {
2584                 wpa_printf(MSG_DEBUG, "WEXT: Using user space MLME");
2585                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2586
2587                 drv->mlme_sock = wpa_driver_wext_open_mlme(drv);
2588                 if (drv->mlme_sock < 0)
2589                         return -1;
2590         }
2591 #endif /* CONFIG_CLIENT_MLME */
2592
2593         return 0;
2594 }
2595
2596
2597 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2598 {
2599         return drv->we_version_compiled;
2600 }
2601
2602
2603 const struct wpa_driver_ops wpa_driver_wext_ops = {
2604         .name = "wext",
2605         .desc = "Linux wireless extensions (generic)",
2606         .get_bssid = wpa_driver_wext_get_bssid,
2607         .get_ssid = wpa_driver_wext_get_ssid,
2608         .set_wpa = wpa_driver_wext_set_wpa,
2609         .set_key = wpa_driver_wext_set_key,
2610         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2611         .set_drop_unencrypted = wpa_driver_wext_set_drop_unencrypted,
2612         .scan = wpa_driver_wext_scan,
2613         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2614         .deauthenticate = wpa_driver_wext_deauthenticate,
2615         .disassociate = wpa_driver_wext_disassociate,
2616         .associate = wpa_driver_wext_associate,
2617         .set_auth_alg = wpa_driver_wext_set_auth_alg,
2618         .init = wpa_driver_wext_init,
2619         .deinit = wpa_driver_wext_deinit,
2620         .set_param = wpa_driver_wext_set_param,
2621         .add_pmkid = wpa_driver_wext_add_pmkid,
2622         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2623         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2624         .get_capa = wpa_driver_wext_get_capa,
2625         .set_operstate = wpa_driver_wext_set_operstate,
2626 #ifdef CONFIG_CLIENT_MLME
2627         .get_hw_feature_data = wpa_driver_wext_get_hw_feature_data,
2628         .set_channel = wpa_driver_wext_set_channel,
2629         .set_ssid = wpa_driver_wext_set_ssid,
2630         .set_bssid = wpa_driver_wext_set_bssid,
2631         .send_mlme = wpa_driver_wext_send_mlme,
2632         .mlme_add_sta = wpa_driver_wext_mlme_add_sta,
2633         .mlme_remove_sta = wpa_driver_wext_mlme_remove_sta,
2634 #endif /* CONFIG_CLIENT_MLME */
2635 };