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 #include "wpa_common.h"
  33
  34 #ifdef CONFIG_CLIENT_MLME
  35 #include <netpacket/packet.h>
  36 /* old definitions from net/mac80211 */
  37
  38 typedef u32 __bitwise __be32;
  39 typedef u64 __bitwise __be64;
  40
  41 #define PRISM2_IOCTL_PRISM2_PARAM (SIOCIWFIRSTPRIV + 0)
  42 #define PRISM2_IOCTL_GET_PRISM2_PARAM (SIOCIWFIRSTPRIV + 1)
  43 #define PRISM2_IOCTL_HOSTAPD (SIOCIWFIRSTPRIV + 3)
  44
  45 #define PRISM2_PARAM_USER_SPACE_MLME 1045
  46 #define PRISM2_PARAM_MGMT_IF            1046
  47 #define PRISM2_HOSTAPD_ADD_STA 2
  48 #define PRISM2_HOSTAPD_REMOVE_STA 3
  49 #define PRISM2_HOSTAPD_GET_HW_FEATURES  1002
  50 #define PRISM2_HOSTAPD_MAX_BUF_SIZE     2048
  51
  52 #ifndef ALIGNED
  53 #define ALIGNED __attribute__ ((aligned))
  54 #endif
  55
  56 struct prism2_hostapd_param {
  57         u32 cmd;
  58         u8 sta_addr[ETH_ALEN];
  59         u8 pad[2];
  60         union {
  61                 struct {
  62                         u16 aid;
  63                         u16 capability;
  64                         u8 supp_rates[32];
  65                         u8 wds_flags;
  66 #define IEEE80211_STA_DYNAMIC_ENC BIT(0)
  67                         u8 enc_flags;
  68                         u16 listen_interval;
  69                 } add_sta;
  70                 struct {
  71                         u16 num_modes;
  72                         u16 flags;
  73                         u8 data[0] ALIGNED; /* num_modes * feature data */
  74                 } hw_features;
  75                 struct {
  76                         u16 mode; /* MODE_* */
  77                         u16 num_supported_rates;
  78                         u16 num_basic_rates;
  79                         u8 data[0] ALIGNED; /* num_supported_rates * u16 +
  80                                              * num_basic_rates * u16 */
  81                 } set_rate_sets;
  82                 struct {
  83                         u16 mode; /* MODE_* */
  84                         u16 chan;
  85                         u32 flag;
  86                         u8 power_level; /* regulatory limit in dBm */
  87                         u8 antenna_max;
  88                 } set_channel_flag;
  89                 struct {
  90                         u32 rd;
  91                 } set_regulatory_domain;
  92                 struct {
  93                         u32 queue;
  94                         s32 aifs;
  95                         u32 cw_min;
  96                         u32 cw_max;
  97                         u32 burst_time; /* maximum burst time in 0.1 ms, i.e.,
  98                                          * 10 = 1 ms */
  99                 } tx_queue_params;
 100         } u;
 101 };
 102
 103 struct hostapd_ioctl_hw_modes_hdr {
 104         int mode;
 105         int num_channels;
 106         int num_rates;
 107 };
 108
 109 /*
 110  * frame format for the management interface that is slated
 111  * to be replaced by "cooked monitor" with radiotap
 112  */
 113 #define IEEE80211_FI_VERSION 0x80211001
 114 struct ieee80211_frame_info {
 115         __be32 version;
 116         __be32 length;
 117         __be64 mactime;
 118         __be64 hosttime;
 119         __be32 phytype;
 120         __be32 channel;
 121         __be32 datarate;
 122         __be32 antenna;
 123         __be32 priority;
 124         __be32 ssi_type;
 125         __be32 ssi_signal;
 126         __be32 ssi_noise;
 127         __be32 preamble;
 128         __be32 encoding;
 129
 130         /* Note: this structure is otherwise identical to capture format used
 131          * in linux-wlan-ng, but this additional field is used to provide meta
 132          * data about the frame to hostapd. This was the easiest method for
 133          * providing this information, but this might change in the future. */
 134         __be32 msg_type;
 135 } __attribute__ ((packed));
 136
 137 /* old mode definitions */
 138 enum {
 139         MODE_IEEE80211A = 0 /* IEEE 802.11a */,
 140         MODE_IEEE80211B = 1 /* IEEE 802.11b only */,
 141         MODE_ATHEROS_TURBO = 2 /* Atheros Turbo mode (2x.11a at 5 GHz) */,
 142         MODE_IEEE80211G = 3 /* IEEE 802.11g (and 802.11b compatibility) */,
 143         MODE_ATHEROS_TURBOG = 4 /* Atheros Turbo mode (2x.11g at 2.4 GHz) */,
 144         NUM_IEEE80211_MODES = 5
 145 };
 146
 147 #ifndef ETH_P_ALL
 148 #define ETH_P_ALL 0x0003
 149 #endif
 150 #endif /* CONFIG_CLIENT_MLME */
 151
 152
 153
 154
 155 static int wpa_driver_wext_flush_pmkid(void *priv);
 156 static int wpa_driver_wext_get_range(void *priv);
 157
 158 static int wpa_driver_wext_send_oper_ifla(struct wpa_driver_wext_data *drv,
 159                                           int linkmode, int operstate)
 160 {
 161         struct {
 162                 struct nlmsghdr hdr;
 163                 struct ifinfomsg ifinfo;
 164                 char opts[16];
 165         } req;
 166         struct rtattr *rta;
 167         static int nl_seq;
 168         ssize_t ret;
 169
 170         os_memset(&req, 0, sizeof(req));
 171
 172         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 173         req.hdr.nlmsg_type = RTM_SETLINK;
 174         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 175         req.hdr.nlmsg_seq = ++nl_seq;
 176         req.hdr.nlmsg_pid = 0;
 177
 178         req.ifinfo.ifi_family = AF_UNSPEC;
 179         req.ifinfo.ifi_type = 0;
 180         req.ifinfo.ifi_index = drv->ifindex;
 181         req.ifinfo.ifi_flags = 0;
 182         req.ifinfo.ifi_change = 0;
 183
 184         if (linkmode != -1) {
 185                 rta = (struct rtattr *)
 186                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 187                 rta->rta_type = IFLA_LINKMODE;
 188                 rta->rta_len = RTA_LENGTH(sizeof(char));
 189                 *((char *) RTA_DATA(rta)) = linkmode;
 190                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 191                         RTA_LENGTH(sizeof(char));
 192         }
 193         if (operstate != -1) {
 194                 rta = (struct rtattr *)
 195                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 196                 rta->rta_type = IFLA_OPERSTATE;
 197                 rta->rta_len = RTA_LENGTH(sizeof(char));
 198                 *((char *) RTA_DATA(rta)) = operstate;
 199                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 200                         RTA_LENGTH(sizeof(char));
 201         }
 202
 203         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 204                    linkmode, operstate);
 205
 206         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 207         if (ret < 0) {
 208                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 209                            "%s (assume operstate is not supported)",
 210                            strerror(errno));
 211         }
 212
 213         return ret < 0 ? -1 : 0;
 214 }
 215
 216
 217 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
 218                                    int idx, u32 value)
 219 {
 220         struct iwreq iwr;
 221         int ret = 0;
 222
 223         os_memset(&iwr, 0, sizeof(iwr));
 224         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 225         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 226         iwr.u.param.value = value;
 227
 228         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 229                 if (errno != EOPNOTSUPP) {
 230                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 231                                    "value 0x%x) failed: %s)",
 232                                    idx, value, strerror(errno));
 233                 }
 234                 ret = errno == EOPNOTSUPP ? -2 : -1;
 235         }
 236
 237         return ret;
 238 }
 239
 240
 241 /**
 242  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
 243  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 244  * @bssid: Buffer for BSSID
 245  * Returns: 0 on success, -1 on failure
 246  */
 247 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
 248 {
 249         struct wpa_driver_wext_data *drv = priv;
 250         struct iwreq iwr;
 251         int ret = 0;
 252
 253         os_memset(&iwr, 0, sizeof(iwr));
 254         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 255
 256         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 257                 perror("ioctl[SIOCGIWAP]");
 258                 ret = -1;
 259         }
 260         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 261
 262         return ret;
 263 }
 264
 265
 266 /**
 267  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
 268  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 269  * @bssid: BSSID
 270  * Returns: 0 on success, -1 on failure
 271  */
 272 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
 273 {
 274         struct wpa_driver_wext_data *drv = priv;
 275         struct iwreq iwr;
 276         int ret = 0;
 277
 278         os_memset(&iwr, 0, sizeof(iwr));
 279         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 280         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 281         if (bssid)
 282                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 283         else
 284                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 285
 286         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 287                 perror("ioctl[SIOCSIWAP]");
 288                 ret = -1;
 289         }
 290
 291         return ret;
 292 }
 293
 294
 295 /**
 296  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 297  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 298  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 299  * Returns: SSID length on success, -1 on failure
 300  */
 301 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 302 {
 303         struct wpa_driver_wext_data *drv = priv;
 304         struct iwreq iwr;
 305         int ret = 0;
 306
 307         os_memset(&iwr, 0, sizeof(iwr));
 308         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 309         iwr.u.essid.pointer = (caddr_t) ssid;
 310         iwr.u.essid.length = 32;
 311
 312         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 313                 perror("ioctl[SIOCGIWESSID]");
 314                 ret = -1;
 315         } else {
 316                 ret = iwr.u.essid.length;
 317                 if (ret > 32)
 318                         ret = 32;
 319                 /* Some drivers include nul termination in the SSID, so let's
 320                  * remove it here before further processing. WE-21 changes this
 321                  * to explicitly require the length _not_ to include nul
 322                  * termination. */
 323                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 324                     drv->we_version_compiled < 21)
 325                         ret--;
 326         }
 327
 328         return ret;
 329 }
 330
 331
 332 /**
 333  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 334  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 335  * @ssid: SSID
 336  * @ssid_len: Length of SSID (0..32)
 337  * Returns: 0 on success, -1 on failure
 338  */
 339 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 340 {
 341         struct wpa_driver_wext_data *drv = priv;
 342         struct iwreq iwr;
 343         int ret = 0;
 344         char buf[33];
 345
 346         if (ssid_len > 32)
 347                 return -1;
 348
 349         os_memset(&iwr, 0, sizeof(iwr));
 350         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 351         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 352         iwr.u.essid.flags = (ssid_len != 0);
 353         os_memset(buf, 0, sizeof(buf));
 354         os_memcpy(buf, ssid, ssid_len);
 355         iwr.u.essid.pointer = (caddr_t) buf;
 356         if (drv->we_version_compiled < 21) {
 357                 /* For historic reasons, set SSID length to include one extra
 358                  * character, C string nul termination, even though SSID is
 359                  * really an octet string that should not be presented as a C
 360                  * string. Some Linux drivers decrement the length by one and
 361                  * can thus end up missing the last octet of the SSID if the
 362                  * length is not incremented here. WE-21 changes this to
 363                  * explicitly require the length _not_ to include nul
 364                  * termination. */
 365                 if (ssid_len)
 366                         ssid_len++;
 367         }
 368         iwr.u.essid.length = ssid_len;
 369
 370         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 371                 perror("ioctl[SIOCSIWESSID]");
 372                 ret = -1;
 373         }
 374
 375         return ret;
 376 }
 377
 378
 379 /**
 380  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 381  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 382  * @freq: Frequency in MHz
 383  * Returns: 0 on success, -1 on failure
 384  */
 385 int wpa_driver_wext_set_freq(void *priv, int freq)
 386 {
 387         struct wpa_driver_wext_data *drv = priv;
 388         struct iwreq iwr;
 389         int ret = 0;
 390
 391         os_memset(&iwr, 0, sizeof(iwr));
 392         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 393         iwr.u.freq.m = freq * 100000;
 394         iwr.u.freq.e = 1;
 395
 396         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 397                 perror("ioctl[SIOCSIWFREQ]");
 398                 ret = -1;
 399         }
 400
 401         return ret;
 402 }
 403
 404
 405 static void
 406 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 407 {
 408         union wpa_event_data data;
 409
 410         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 411                    custom);
 412
 413         os_memset(&data, 0, sizeof(data));
 414         /* Host AP driver */
 415         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 416                 data.michael_mic_failure.unicast =
 417                         os_strstr(custom, " unicast ") != NULL;
 418                 /* TODO: parse parameters(?) */
 419                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 420         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 421                 char *spos;
 422                 int bytes;
 423
 424                 spos = custom + 17;
 425
 426                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 427                 if (!bytes || (bytes & 1))
 428                         return;
 429                 bytes /= 2;
 430
 431                 data.assoc_info.req_ies = os_malloc(bytes);
 432                 if (data.assoc_info.req_ies == NULL)
 433                         return;
 434
 435                 data.assoc_info.req_ies_len = bytes;
 436                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 437
 438                 spos += bytes * 2;
 439
 440                 data.assoc_info.resp_ies = NULL;
 441                 data.assoc_info.resp_ies_len = 0;
 442
 443                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 444                         spos += 9;
 445
 446                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 447                         if (!bytes || (bytes & 1))
 448                                 goto done;
 449                         bytes /= 2;
 450
 451                         data.assoc_info.resp_ies = os_malloc(bytes);
 452                         if (data.assoc_info.resp_ies == NULL)
 453                                 goto done;
 454
 455                         data.assoc_info.resp_ies_len = bytes;
 456                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 457                 }
 458
 459                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 460
 461         done:
 462                 os_free(data.assoc_info.resp_ies);
 463                 os_free(data.assoc_info.req_ies);
 464 #ifdef CONFIG_PEERKEY
 465         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 466                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 467                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 468                                    "STKSTART.request '%s'", custom + 17);
 469                         return;
 470                 }
 471                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 472 #endif /* CONFIG_PEERKEY */
 473         }
 474 }
 475
 476
 477 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 478         void *ctx, const char *ev, size_t len)
 479 {
 480         const struct iw_michaelmicfailure *mic;
 481         union wpa_event_data data;
 482
 483         if (len < sizeof(*mic))
 484                 return -1;
 485
 486         mic = (const struct iw_michaelmicfailure *) ev;
 487
 488         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 489                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 490                    MAC2STR(mic->src_addr.sa_data));
 491
 492         os_memset(&data, 0, sizeof(data));
 493         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 494         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 495
 496         return 0;
 497 }
 498
 499
 500 static int wpa_driver_wext_event_wireless_pmkidcand(
 501         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 502 {
 503         const struct iw_pmkid_cand *cand;
 504         union wpa_event_data data;
 505         const u8 *addr;
 506
 507         if (len < sizeof(*cand))
 508                 return -1;
 509
 510         cand = (const struct iw_pmkid_cand *) ev;
 511         addr = (const u8 *) cand->bssid.sa_data;
 512
 513         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 514                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 515                    cand->index, MAC2STR(addr));
 516
 517         os_memset(&data, 0, sizeof(data));
 518         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 519         data.pmkid_candidate.index = cand->index;
 520         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 521         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 522
 523         return 0;
 524 }
 525
 526
 527 static int wpa_driver_wext_event_wireless_assocreqie(
 528         struct wpa_driver_wext_data *drv, const char *ev, int len)
 529 {
 530         if (len < 0)
 531                 return -1;
 532
 533         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 534                     len);
 535         os_free(drv->assoc_req_ies);
 536         drv->assoc_req_ies = os_malloc(len);
 537         if (drv->assoc_req_ies == NULL) {
 538                 drv->assoc_req_ies_len = 0;
 539                 return -1;
 540         }
 541         os_memcpy(drv->assoc_req_ies, ev, len);
 542         drv->assoc_req_ies_len = len;
 543
 544         return 0;
 545 }
 546
 547
 548 static int wpa_driver_wext_event_wireless_assocrespie(
 549         struct wpa_driver_wext_data *drv, const char *ev, int len)
 550 {
 551         if (len < 0)
 552                 return -1;
 553
 554         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 555                     len);
 556         os_free(drv->assoc_resp_ies);
 557         drv->assoc_resp_ies = os_malloc(len);
 558         if (drv->assoc_resp_ies == NULL) {
 559                 drv->assoc_resp_ies_len = 0;
 560                 return -1;
 561         }
 562         os_memcpy(drv->assoc_resp_ies, ev, len);
 563         drv->assoc_resp_ies_len = len;
 564
 565         return 0;
 566 }
 567
 568
 569 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 570 {
 571         union wpa_event_data data;
 572
 573         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 574                 return;
 575
 576         os_memset(&data, 0, sizeof(data));
 577         if (drv->assoc_req_ies) {
 578                 data.assoc_info.req_ies = drv->assoc_req_ies;
 579                 drv->assoc_req_ies = NULL;
 580                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 581         }
 582         if (drv->assoc_resp_ies) {
 583                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 584                 drv->assoc_resp_ies = NULL;
 585                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 586         }
 587
 588         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 589
 590         os_free(data.assoc_info.req_ies);
 591         os_free(data.assoc_info.resp_ies);
 592 }
 593
 594
 595 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 596                                            void *ctx, char *data, int len)
 597 {
 598         struct iw_event iwe_buf, *iwe = &iwe_buf;
 599         char *pos, *end, *custom, *buf;
 600
 601         pos = data;
 602         end = data + len;
 603
 604         while (pos + IW_EV_LCP_LEN <= end) {
 605                 /* Event data may be unaligned, so make a local, aligned copy
 606                  * before processing. */
 607                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 608                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 609                            iwe->cmd, iwe->len);
 610                 if (iwe->len <= IW_EV_LCP_LEN)
 611                         return;
 612
 613                 custom = pos + IW_EV_POINT_LEN;
 614                 if (drv->we_version_compiled > 18 &&
 615                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 616                      iwe->cmd == IWEVCUSTOM ||
 617                      iwe->cmd == IWEVASSOCREQIE ||
 618                      iwe->cmd == IWEVASSOCRESPIE ||
 619                      iwe->cmd == IWEVPMKIDCAND)) {
 620                         /* WE-19 removed the pointer from struct iw_point */
 621                         char *dpos = (char *) &iwe_buf.u.data.length;
 622                         int dlen = dpos - (char *) &iwe_buf;
 623                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 624                                   sizeof(struct iw_event) - dlen);
 625                 } else {
 626                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 627                         custom += IW_EV_POINT_OFF;
 628                 }
 629
 630                 switch (iwe->cmd) {
 631                 case SIOCGIWAP:
 632                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 633                                    MACSTR,
 634                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 635                         if (is_zero_ether_addr(
 636                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 637                             os_memcmp(iwe->u.ap_addr.sa_data,
 638                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 639                             0) {
 640                                 os_free(drv->assoc_req_ies);
 641                                 drv->assoc_req_ies = NULL;
 642                                 os_free(drv->assoc_resp_ies);
 643                                 drv->assoc_resp_ies = NULL;
 644                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 645                                                      NULL);
 646
 647                         } else {
 648                                 wpa_driver_wext_event_assoc_ies(drv);
 649                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 650                         }
 651                         break;
 652                 case IWEVMICHAELMICFAILURE:
 653                         wpa_driver_wext_event_wireless_michaelmicfailure(
 654                                 ctx, custom, iwe->u.data.length);
 655                         break;
 656                 case IWEVCUSTOM:
 657                         if (custom + iwe->u.data.length > end)
 658                                 return;
 659                         buf = os_malloc(iwe->u.data.length + 1);
 660                         if (buf == NULL)
 661                                 return;
 662                         os_memcpy(buf, custom, iwe->u.data.length);
 663                         buf[iwe->u.data.length] = '\0';
 664                         wpa_driver_wext_event_wireless_custom(ctx, buf);
 665                         os_free(buf);
 666                         break;
 667                 case SIOCGIWSCAN:
 668                         drv->scan_complete_events = 1;
 669                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 670                                              drv, ctx);
 671                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 672                         break;
 673                 case IWEVASSOCREQIE:
 674                         wpa_driver_wext_event_wireless_assocreqie(
 675                                 drv, custom, iwe->u.data.length);
 676                         break;
 677                 case IWEVASSOCRESPIE:
 678                         wpa_driver_wext_event_wireless_assocrespie(
 679                                 drv, custom, iwe->u.data.length);
 680                         break;
 681                 case IWEVPMKIDCAND:
 682                         wpa_driver_wext_event_wireless_pmkidcand(
 683                                 drv, custom, iwe->u.data.length);
 684                         break;
 685                 }
 686
 687                 pos += iwe->len;
 688         }
 689 }
 690
 691
 692 static void wpa_driver_wext_event_link(void *ctx, char *buf, size_t len,
 693                                        int del)
 694 {
 695         union wpa_event_data event;
 696
 697         os_memset(&event, 0, sizeof(event));
 698         if (len > sizeof(event.interface_status.ifname))
 699                 len = sizeof(event.interface_status.ifname) - 1;
 700         os_memcpy(event.interface_status.ifname, buf, len);
 701         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 702                 EVENT_INTERFACE_ADDED;
 703
 704         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 705                    del ? "DEL" : "NEW",
 706                    event.interface_status.ifname,
 707                    del ? "removed" : "added");
 708
 709         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 710 }
 711
 712
 713 static void wpa_driver_wext_event_rtm_newlink(struct wpa_driver_wext_data *drv,
 714                                               void *ctx, struct nlmsghdr *h,
 715                                               size_t len)
 716 {
 717         struct ifinfomsg *ifi;
 718         int attrlen, nlmsg_len, rta_len;
 719         struct rtattr * attr;
 720
 721         if (len < sizeof(*ifi))
 722                 return;
 723
 724         ifi = NLMSG_DATA(h);
 725
 726         if (drv->ifindex != ifi->ifi_index && drv->ifindex2 != ifi->ifi_index)
 727         {
 728                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 729                            ifi->ifi_index);
 730                 return;
 731         }
 732
 733         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 734                    "(%s%s%s%s)",
 735                    drv->operstate, ifi->ifi_flags,
 736                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 737                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 738                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 739                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 740         /*
 741          * Some drivers send the association event before the operup event--in
 742          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 743          * fails. This will hit us when wpa_supplicant does not need to do
 744          * IEEE 802.1X authentication
 745          */
 746         if (drv->operstate == 1 &&
 747             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 748             !(ifi->ifi_flags & IFF_RUNNING))
 749                 wpa_driver_wext_send_oper_ifla(drv, -1, IF_OPER_UP);
 750
 751         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 752
 753         attrlen = h->nlmsg_len - nlmsg_len;
 754         if (attrlen < 0)
 755                 return;
 756
 757         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 758
 759         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 760         while (RTA_OK(attr, attrlen)) {
 761                 if (attr->rta_type == IFLA_WIRELESS) {
 762                         wpa_driver_wext_event_wireless(
 763                                 drv, ctx, ((char *) attr) + rta_len,
 764                                 attr->rta_len - rta_len);
 765                 } else if (attr->rta_type == IFLA_IFNAME) {
 766                         wpa_driver_wext_event_link(ctx,
 767                                                    ((char *) attr) + rta_len,
 768                                                    attr->rta_len - rta_len, 0);
 769                 }
 770                 attr = RTA_NEXT(attr, attrlen);
 771         }
 772 }
 773
 774
 775 static void wpa_driver_wext_event_rtm_dellink(struct wpa_driver_wext_data *drv,
 776                                               void *ctx, struct nlmsghdr *h,
 777                                               size_t len)
 778 {
 779         struct ifinfomsg *ifi;
 780         int attrlen, nlmsg_len, rta_len;
 781         struct rtattr * attr;
 782
 783         if (len < sizeof(*ifi))
 784                 return;
 785
 786         ifi = NLMSG_DATA(h);
 787
 788         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 789
 790         attrlen = h->nlmsg_len - nlmsg_len;
 791         if (attrlen < 0)
 792                 return;
 793
 794         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 795
 796         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 797         while (RTA_OK(attr, attrlen)) {
 798                 if (attr->rta_type == IFLA_IFNAME) {
 799                         wpa_driver_wext_event_link(ctx,
 800                                                    ((char *) attr) + rta_len,
 801                                                    attr->rta_len - rta_len, 1);
 802                 }
 803                 attr = RTA_NEXT(attr, attrlen);
 804         }
 805 }
 806
 807
 808 static void wpa_driver_wext_event_receive(int sock, void *eloop_ctx,
 809                                           void *sock_ctx)
 810 {
 811         char buf[8192];
 812         int left;
 813         struct sockaddr_nl from;
 814         socklen_t fromlen;
 815         struct nlmsghdr *h;
 816         int max_events = 10;
 817
 818 try_again:
 819         fromlen = sizeof(from);
 820         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 821                         (struct sockaddr *) &from, &fromlen);
 822         if (left < 0) {
 823                 if (errno != EINTR && errno != EAGAIN)
 824                         perror("recvfrom(netlink)");
 825                 return;
 826         }
 827
 828         h = (struct nlmsghdr *) buf;
 829         while (left >= (int) sizeof(*h)) {
 830                 int len, plen;
 831
 832                 len = h->nlmsg_len;
 833                 plen = len - sizeof(*h);
 834                 if (len > left || plen < 0) {
 835                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 836                                    "len=%d left=%d plen=%d",
 837                                    len, left, plen);
 838                         break;
 839                 }
 840
 841                 switch (h->nlmsg_type) {
 842                 case RTM_NEWLINK:
 843                         wpa_driver_wext_event_rtm_newlink(eloop_ctx, sock_ctx,
 844                                                           h, plen);
 845                         break;
 846                 case RTM_DELLINK:
 847                         wpa_driver_wext_event_rtm_dellink(eloop_ctx, sock_ctx,
 848                                                           h, plen);
 849                         break;
 850                 }
 851
 852                 len = NLMSG_ALIGN(len);
 853                 left -= len;
 854                 h = (struct nlmsghdr *) ((char *) h + len);
 855         }
 856
 857         if (left > 0) {
 858                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 859                            "message", left);
 860         }
 861
 862         if (--max_events > 0) {
 863                 /*
 864                  * Try to receive all events in one eloop call in order to
 865                  * limit race condition on cases where AssocInfo event, Assoc
 866                  * event, and EAPOL frames are received more or less at the
 867                  * same time. We want to process the event messages first
 868                  * before starting EAPOL processing.
 869                  */
 870                 goto try_again;
 871         }
 872 }
 873
 874
 875 static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
 876                                               const char *ifname, int *flags)
 877 {
 878         struct ifreq ifr;
 879
 880         os_memset(&ifr, 0, sizeof(ifr));
 881         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 882         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 883                 perror("ioctl[SIOCGIFFLAGS]");
 884                 return -1;
 885         }
 886         *flags = ifr.ifr_flags & 0xffff;
 887         return 0;
 888 }
 889
 890
 891 /**
 892  * wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 893  * @drv: driver_wext private data
 894  * @flags: Pointer to returned flags value
 895  * Returns: 0 on success, -1 on failure
 896  */
 897 int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
 898 {
 899         return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
 900 }
 901
 902
 903 static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
 904                                               const char *ifname, int flags)
 905 {
 906         struct ifreq ifr;
 907
 908         os_memset(&ifr, 0, sizeof(ifr));
 909         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 910         ifr.ifr_flags = flags & 0xffff;
 911         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 912                 perror("SIOCSIFFLAGS");
 913                 return -1;
 914         }
 915         return 0;
 916 }
 917
 918
 919 #ifdef CONFIG_CLIENT_MLME
 920
 921 static int wpa_driver_prism2_param_set(struct wpa_driver_wext_data *drv,
 922                                        int param, int value)
 923 {
 924         struct iwreq iwr;
 925         int *i;
 926
 927         os_memset(&iwr, 0, sizeof(iwr));
 928         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 929         i = (int *) iwr.u.name;
 930         *i++ = param;
 931         *i++ = value;
 932
 933         return ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr);
 934 }
 935
 936
 937 static int wpa_driver_prism2_param_get(struct wpa_driver_wext_data *drv,
 938                                        int param)
 939 {
 940         struct iwreq iwr;
 941         int *i;
 942
 943         os_memset(&iwr, 0, sizeof(iwr));
 944         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 945         i = (int *) iwr.u.name;
 946         *i = param;
 947
 948         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_GET_PRISM2_PARAM, &iwr) < 0) {
 949                 perror("ioctl[PRISM2_IOCTL_GET_PRISM2_PARAM]");
 950                 return -1;
 951         }
 952
 953         return *i;
 954 }
 955
 956 #endif /* CONFIG_CLIENT_MLME */
 957
 958
 959 /**
 960  * wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 961  * @drv: driver_wext private data
 962  * @flags: New value for flags
 963  * Returns: 0 on success, -1 on failure
 964  */
 965 int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
 966 {
 967         return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
 968 }
 969
 970
 971 /**
 972  * wpa_driver_wext_init - Initialize WE driver interface
 973  * @ctx: context to be used when calling wpa_supplicant functions,
 974  * e.g., wpa_supplicant_event()
 975  * @ifname: interface name, e.g., wlan0
 976  * Returns: Pointer to private data, %NULL on failure
 977  */
 978 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 979 {
 980         int s, flags;
 981         struct sockaddr_nl local;
 982         struct wpa_driver_wext_data *drv;
 983
 984         drv = os_zalloc(sizeof(*drv));
 985         if (drv == NULL)
 986                 return NULL;
 987         drv->ctx = ctx;
 988         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 989
 990         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 991         if (drv->ioctl_sock < 0) {
 992                 perror("socket(PF_INET,SOCK_DGRAM)");
 993                 os_free(drv);
 994                 return NULL;
 995         }
 996
 997         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 998         if (s < 0) {
 999                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1000                 close(drv->ioctl_sock);
1001                 os_free(drv);
1002                 return NULL;
1003         }
1004
1005         os_memset(&local, 0, sizeof(local));
1006         local.nl_family = AF_NETLINK;
1007         local.nl_groups = RTMGRP_LINK;
1008         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1009                 perror("bind(netlink)");
1010                 close(s);
1011                 close(drv->ioctl_sock);
1012                 os_free(drv);
1013                 return NULL;
1014         }
1015
1016         eloop_register_read_sock(s, wpa_driver_wext_event_receive, drv, ctx);
1017         drv->event_sock = s;
1018
1019         drv->mlme_sock = -1;
1020
1021         if (wpa_driver_wext_get_ifflags(drv, &flags) != 0)
1022                 printf("Could not get interface '%s' flags\n", drv->ifname);
1023         else if (!(flags & IFF_UP)) {
1024                 if (wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
1025                         printf("Could not set interface '%s' UP\n",
1026                                drv->ifname);
1027                 } else {
1028                         /*
1029                          * Wait some time to allow driver to initialize before
1030                          * starting configuring the driver. This seems to be
1031                          * needed at least some drivers that load firmware etc.
1032                          * when the interface is set up.
1033                          */
1034                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
1035                                    "a second for the driver to complete "
1036                                    "initialization", drv->ifname);
1037                         sleep(1);
1038                 }
1039         }
1040
1041         /*
1042          * Make sure that the driver does not have any obsolete PMKID entries.
1043          */
1044         wpa_driver_wext_flush_pmkid(drv);
1045
1046         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
1047                 printf("Could not configure driver to use managed mode\n");
1048         }
1049
1050         wpa_driver_wext_get_range(drv);
1051
1052         drv->ifindex = if_nametoindex(drv->ifname);
1053
1054         if (os_strncmp(ifname, "wlan", 4) == 0) {
1055                 /*
1056                  * Host AP driver may use both wlan# and wifi# interface in
1057                  * wireless events. Since some of the versions included WE-18
1058                  * support, let's add the alternative ifindex also from
1059                  * driver_wext.c for the time being. This may be removed at
1060                  * some point once it is believed that old versions of the
1061                  * driver are not in use anymore.
1062                  */
1063                 char ifname2[IFNAMSIZ + 1];
1064                 os_strlcpy(ifname2, ifname, sizeof(ifname2));
1065                 os_memcpy(ifname2, "wifi", 4);
1066                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
1067         }
1068
1069         wpa_driver_wext_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1070
1071         return drv;
1072 }
1073
1074
1075 /**
1076  * wpa_driver_wext_deinit - Deinitialize WE driver interface
1077  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1078  *
1079  * Shut down driver interface and processing of driver events. Free
1080  * private data buffer if one was allocated in wpa_driver_wext_init().
1081  */
1082 void wpa_driver_wext_deinit(void *priv)
1083 {
1084         struct wpa_driver_wext_data *drv = priv;
1085         int flags;
1086
1087         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1088
1089         /*
1090          * Clear possibly configured driver parameters in order to make it
1091          * easier to use the driver after wpa_supplicant has been terminated.
1092          */
1093         (void) wpa_driver_wext_set_bssid(drv,
1094                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1095
1096         wpa_driver_wext_send_oper_ifla(priv, 0, IF_OPER_UP);
1097
1098         eloop_unregister_read_sock(drv->event_sock);
1099         if (drv->mlme_sock >= 0)
1100                 eloop_unregister_read_sock(drv->mlme_sock);
1101
1102         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
1103                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
1104
1105 #ifdef CONFIG_CLIENT_MLME
1106         if (drv->mlmedev[0]) {
1107                 if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev,
1108                                                        &flags) == 0)
1109                         (void) wpa_driver_wext_set_ifflags_ifname(
1110                                 drv, drv->mlmedev, flags & ~IFF_UP);
1111                 wpa_driver_prism2_param_set(drv, PRISM2_PARAM_MGMT_IF, 0);
1112                 wpa_driver_prism2_param_set(drv, PRISM2_PARAM_USER_SPACE_MLME,
1113                                             0);
1114         }
1115 #endif /* CONFIG_CLIENT_MLME */
1116
1117         close(drv->event_sock);
1118         close(drv->ioctl_sock);
1119         if (drv->mlme_sock >= 0)
1120                 close(drv->mlme_sock);
1121         os_free(drv->assoc_req_ies);
1122         os_free(drv->assoc_resp_ies);
1123         os_free(drv);
1124 }
1125
1126
1127 /**
1128  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1129  * @eloop_ctx: Unused
1130  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1131  *
1132  * This function can be used as registered timeout when starting a scan to
1133  * generate a scan completed event if the driver does not report this.
1134  */
1135 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1136 {
1137         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1138         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1139 }
1140
1141
1142 /**
1143  * wpa_driver_wext_scan - Request the driver to initiate scan
1144  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1145  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1146  *      all SSIDs (either active scan with broadcast SSID or passive
1147  *      scan
1148  * @ssid_len: Length of the SSID
1149  * Returns: 0 on success, -1 on failure
1150  */
1151 int wpa_driver_wext_scan(void *priv, const u8 *ssid, size_t ssid_len)
1152 {
1153         struct wpa_driver_wext_data *drv = priv;
1154         struct iwreq iwr;
1155         int ret = 0, timeout;
1156         struct iw_scan_req req;
1157
1158         if (ssid_len > IW_ESSID_MAX_SIZE) {
1159                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1160                            __FUNCTION__, (unsigned long) ssid_len);
1161                 return -1;
1162         }
1163
1164         os_memset(&iwr, 0, sizeof(iwr));
1165         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1166
1167         if (ssid && ssid_len) {
1168                 os_memset(&req, 0, sizeof(req));
1169                 req.essid_len = ssid_len;
1170                 req.bssid.sa_family = ARPHRD_ETHER;
1171                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1172                 os_memcpy(req.essid, ssid, ssid_len);
1173                 iwr.u.data.pointer = (caddr_t) &req;
1174                 iwr.u.data.length = sizeof(req);
1175                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1176         }
1177
1178         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1179                 perror("ioctl[SIOCSIWSCAN]");
1180                 ret = -1;
1181         }
1182
1183         /* Not all drivers generate "scan completed" wireless event, so try to
1184          * read results after a timeout. */
1185         timeout = 5;
1186         if (drv->scan_complete_events) {
1187                 /*
1188                  * The driver seems to deliver SIOCGIWSCAN events to notify
1189                  * when scan is complete, so use longer timeout to avoid race
1190                  * conditions with scanning and following association request.
1191                  */
1192                 timeout = 30;
1193         }
1194         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1195                    "seconds", ret, timeout);
1196         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1197         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1198                                drv->ctx);
1199
1200         return ret;
1201 }
1202
1203
1204 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1205                                     size_t *len)
1206 {
1207         struct iwreq iwr;
1208         u8 *res_buf;
1209         size_t res_buf_len;
1210
1211         res_buf_len = IW_SCAN_MAX_DATA;
1212         for (;;) {
1213                 res_buf = os_malloc(res_buf_len);
1214                 if (res_buf == NULL)
1215                         return NULL;
1216                 os_memset(&iwr, 0, sizeof(iwr));
1217                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1218                 iwr.u.data.pointer = res_buf;
1219                 iwr.u.data.length = res_buf_len;
1220
1221                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1222                         break;
1223
1224                 if (errno == E2BIG && res_buf_len < 100000) {
1225                         os_free(res_buf);
1226                         res_buf = NULL;
1227                         res_buf_len *= 2;
1228                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1229                                    "trying larger buffer (%lu bytes)",
1230                                    (unsigned long) res_buf_len);
1231                 } else {
1232                         perror("ioctl[SIOCGIWSCAN]");
1233                         os_free(res_buf);
1234                         return NULL;
1235                 }
1236         }
1237
1238         if (iwr.u.data.length > res_buf_len) {
1239                 os_free(res_buf);
1240                 return NULL;
1241         }
1242         *len = iwr.u.data.length;
1243
1244         return res_buf;
1245 }
1246
1247
1248 /*
1249  * Data structure for collecting WEXT scan results. This is needed to allow
1250  * the various methods of reporting IEs to be combined into a single IE buffer.
1251  */
1252 struct wext_scan_data {
1253         struct wpa_scan_res res;
1254         u8 *ie;
1255         size_t ie_len;
1256         u8 ssid[32];
1257         size_t ssid_len;
1258         int maxrate;
1259 };
1260
1261
1262 static void wext_get_scan_mode(struct iw_event *iwe,
1263                                struct wext_scan_data *res)
1264 {
1265         if (iwe->u.mode == IW_MODE_ADHOC)
1266                 res->res.caps |= IEEE80211_CAP_IBSS;
1267         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1268                 res->res.caps |= IEEE80211_CAP_ESS;
1269 }
1270
1271
1272 static void wext_get_scan_ssid(struct iw_event *iwe,
1273                                struct wext_scan_data *res, char *custom,
1274                                char *end)
1275 {
1276         int ssid_len = iwe->u.essid.length;
1277         if (custom + ssid_len > end)
1278                 return;
1279         if (iwe->u.essid.flags &&
1280             ssid_len > 0 &&
1281             ssid_len <= IW_ESSID_MAX_SIZE) {
1282                 os_memcpy(res->ssid, custom, ssid_len);
1283                 res->ssid_len = ssid_len;
1284         }
1285 }
1286
1287
1288 static void wext_get_scan_freq(struct iw_event *iwe,
1289                                struct wext_scan_data *res)
1290 {
1291         int divi = 1000000, i;
1292
1293         if (iwe->u.freq.e == 0) {
1294                 /*
1295                  * Some drivers do not report frequency, but a channel.
1296                  * Try to map this to frequency by assuming they are using
1297                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1298                  * frequency if the driver sends both frequency and channel,
1299                  * since the driver may be sending an A-band channel that we
1300                  * don't handle here.
1301                  */
1302
1303                 if (res->res.freq)
1304                         return;
1305
1306                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1307                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1308                         return;
1309                 } else if (iwe->u.freq.m == 14) {
1310                         res->res.freq = 2484;
1311                         return;
1312                 }
1313         }
1314
1315         if (iwe->u.freq.e > 6) {
1316                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1317                            MACSTR " m=%d e=%d)",
1318                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1319                            iwe->u.freq.e);
1320                 return;
1321         }
1322
1323         for (i = 0; i < iwe->u.freq.e; i++)
1324                 divi /= 10;
1325         res->res.freq = iwe->u.freq.m / divi;
1326 }
1327
1328
1329 static void wext_get_scan_qual(struct iw_event *iwe,
1330                                struct wext_scan_data *res)
1331 {
1332         res->res.qual = iwe->u.qual.qual;
1333         res->res.noise = iwe->u.qual.noise;
1334         res->res.level = iwe->u.qual.level;
1335 }
1336
1337
1338 static void wext_get_scan_encode(struct iw_event *iwe,
1339                                  struct wext_scan_data *res)
1340 {
1341         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1342                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1343 }
1344
1345
1346 static void wext_get_scan_rate(struct iw_event *iwe,
1347                                struct wext_scan_data *res, char *pos,
1348                                char *end)
1349 {
1350         int maxrate;
1351         char *custom = pos + IW_EV_LCP_LEN;
1352         struct iw_param p;
1353         size_t clen;
1354
1355         clen = iwe->len;
1356         if (custom + clen > end)
1357                 return;
1358         maxrate = 0;
1359         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1360                 /* Note: may be misaligned, make a local, aligned copy */
1361                 os_memcpy(&p, custom, sizeof(struct iw_param));
1362                 if (p.value > maxrate)
1363                         maxrate = p.value;
1364                 clen -= sizeof(struct iw_param);
1365                 custom += sizeof(struct iw_param);
1366         }
1367         res->maxrate = maxrate;
1368 }
1369
1370
1371 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1372                                     struct wext_scan_data *res, char *custom,
1373                                     char *end)
1374 {
1375         char *genie, *gpos, *gend;
1376         u8 *tmp;
1377
1378         gpos = genie = custom;
1379         gend = genie + iwe->u.data.length;
1380         if (gend > end) {
1381                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1382                 return;
1383         }
1384
1385         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1386         if (tmp == NULL)
1387                 return;
1388         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1389         res->ie = tmp;
1390         res->ie_len += gend - gpos;
1391 }
1392
1393
1394 static void wext_get_scan_custom(struct iw_event *iwe,
1395                                  struct wext_scan_data *res, char *custom,
1396                                  char *end)
1397 {
1398         size_t clen;
1399         u8 *tmp;
1400
1401         clen = iwe->u.data.length;
1402         if (custom + clen > end)
1403                 return;
1404
1405         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1406                 char *spos;
1407                 int bytes;
1408                 spos = custom + 7;
1409                 bytes = custom + clen - spos;
1410                 if (bytes & 1)
1411                         return;
1412                 bytes /= 2;
1413                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1414                 if (tmp == NULL)
1415                         return;
1416                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1417                 res->ie = tmp;
1418                 res->ie_len += bytes;
1419         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1420                 char *spos;
1421                 int bytes;
1422                 spos = custom + 7;
1423                 bytes = custom + clen - spos;
1424                 if (bytes & 1)
1425                         return;
1426                 bytes /= 2;
1427                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1428                 if (tmp == NULL)
1429                         return;
1430                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1431                 res->ie = tmp;
1432                 res->ie_len += bytes;
1433         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1434                 char *spos;
1435                 int bytes;
1436                 u8 bin[8];
1437                 spos = custom + 4;
1438                 bytes = custom + clen - spos;
1439                 if (bytes != 16) {
1440                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1441                         return;
1442                 }
1443                 bytes /= 2;
1444                 hexstr2bin(spos, bin, bytes);
1445                 res->res.tsf += WPA_GET_BE64(bin);
1446         }
1447 }
1448
1449
1450 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1451 {
1452         return drv->we_version_compiled > 18 &&
1453                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1454                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1455 }
1456
1457
1458 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1459                                            struct wext_scan_data *data)
1460 {
1461         struct wpa_scan_res **tmp;
1462         struct wpa_scan_res *r;
1463         size_t extra_len;
1464         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1465
1466         /* Figure out whether we need to fake any IEs */
1467         pos = data->ie;
1468         end = pos + data->ie_len;
1469         while (pos && pos + 1 < end) {
1470                 if (pos + 2 + pos[1] > end)
1471                         break;
1472                 if (pos[0] == WLAN_EID_SSID)
1473                         ssid_ie = pos;
1474                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1475                         rate_ie = pos;
1476                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1477                         rate_ie = pos;
1478                 pos += 2 + pos[1];
1479         }
1480
1481         extra_len = 0;
1482         if (ssid_ie == NULL)
1483                 extra_len += 2 + data->ssid_len;
1484         if (rate_ie == NULL && data->maxrate)
1485                 extra_len += 3;
1486
1487         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1488         if (r == NULL)
1489                 return;
1490         os_memcpy(r, &data->res, sizeof(*r));
1491         r->ie_len = extra_len + data->ie_len;
1492         pos = (u8 *) (r + 1);
1493         if (ssid_ie == NULL) {
1494                 /*
1495                  * Generate a fake SSID IE since the driver did not report
1496                  * a full IE list.
1497                  */
1498                 *pos++ = WLAN_EID_SSID;
1499                 *pos++ = data->ssid_len;
1500                 os_memcpy(pos, data->ssid, data->ssid_len);
1501                 pos += data->ssid_len;
1502         }
1503         if (rate_ie == NULL && data->maxrate) {
1504                 /*
1505                  * Generate a fake Supported Rates IE since the driver did not
1506                  * report a full IE list.
1507                  */
1508                 *pos++ = WLAN_EID_SUPP_RATES;
1509                 *pos++ = 1;
1510                 *pos++ = data->maxrate;
1511         }
1512         if (data->ie)
1513                 os_memcpy(pos, data->ie, data->ie_len);
1514
1515         tmp = os_realloc(res->res,
1516                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1517         if (tmp == NULL) {
1518                 os_free(r);
1519                 return;
1520         }
1521         tmp[res->num++] = r;
1522         res->res = tmp;
1523 }
1524
1525
1526 /**
1527  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1528  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1529  * Returns: Scan results on success, -1 on failure
1530  */
1531 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1532 {
1533         struct wpa_driver_wext_data *drv = priv;
1534         size_t ap_num = 0, len;
1535         int first;
1536         u8 *res_buf;
1537         struct iw_event iwe_buf, *iwe = &iwe_buf;
1538         char *pos, *end, *custom;
1539         struct wpa_scan_results *res;
1540         struct wext_scan_data data;
1541
1542         res_buf = wpa_driver_wext_giwscan(drv, &len);
1543         if (res_buf == NULL)
1544                 return NULL;
1545
1546         ap_num = 0;
1547         first = 1;
1548
1549         res = os_zalloc(sizeof(*res));
1550         if (res == NULL) {
1551                 os_free(res_buf);
1552                 return NULL;
1553         }
1554
1555         pos = (char *) res_buf;
1556         end = (char *) res_buf + len;
1557         os_memset(&data, 0, sizeof(data));
1558
1559         while (pos + IW_EV_LCP_LEN <= end) {
1560                 /* Event data may be unaligned, so make a local, aligned copy
1561                  * before processing. */
1562                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1563                 if (iwe->len <= IW_EV_LCP_LEN)
1564                         break;
1565
1566                 custom = pos + IW_EV_POINT_LEN;
1567                 if (wext_19_iw_point(drv, iwe->cmd)) {
1568                         /* WE-19 removed the pointer from struct iw_point */
1569                         char *dpos = (char *) &iwe_buf.u.data.length;
1570                         int dlen = dpos - (char *) &iwe_buf;
1571                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1572                                   sizeof(struct iw_event) - dlen);
1573                 } else {
1574                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1575                         custom += IW_EV_POINT_OFF;
1576                 }
1577
1578                 switch (iwe->cmd) {
1579                 case SIOCGIWAP:
1580                         if (!first)
1581                                 wpa_driver_wext_add_scan_entry(res, &data);
1582                         first = 0;
1583                         os_free(data.ie);
1584                         os_memset(&data, 0, sizeof(data));
1585                         os_memcpy(data.res.bssid,
1586                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1587                         break;
1588                 case SIOCGIWMODE:
1589                         wext_get_scan_mode(iwe, &data);
1590                         break;
1591                 case SIOCGIWESSID:
1592                         wext_get_scan_ssid(iwe, &data, custom, end);
1593                         break;
1594                 case SIOCGIWFREQ:
1595                         wext_get_scan_freq(iwe, &data);
1596                         break;
1597                 case IWEVQUAL:
1598                         wext_get_scan_qual(iwe, &data);
1599                         break;
1600                 case SIOCGIWENCODE:
1601                         wext_get_scan_encode(iwe, &data);
1602                         break;
1603                 case SIOCGIWRATE:
1604                         wext_get_scan_rate(iwe, &data, pos, end);
1605                         break;
1606                 case IWEVGENIE:
1607                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1608                         break;
1609                 case IWEVCUSTOM:
1610                         wext_get_scan_custom(iwe, &data, custom, end);
1611                         break;
1612                 }
1613
1614                 pos += iwe->len;
1615         }
1616         os_free(res_buf);
1617         res_buf = NULL;
1618         if (!first)
1619                 wpa_driver_wext_add_scan_entry(res, &data);
1620         os_free(data.ie);
1621
1622         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1623                    (unsigned long) len, (unsigned long) res->num);
1624
1625         return res;
1626 }
1627
1628
1629 static int wpa_driver_wext_get_range(void *priv)
1630 {
1631         struct wpa_driver_wext_data *drv = priv;
1632         struct iw_range *range;
1633         struct iwreq iwr;
1634         int minlen;
1635         size_t buflen;
1636
1637         /*
1638          * Use larger buffer than struct iw_range in order to allow the
1639          * structure to grow in the future.
1640          */
1641         buflen = sizeof(struct iw_range) + 500;
1642         range = os_zalloc(buflen);
1643         if (range == NULL)
1644                 return -1;
1645
1646         os_memset(&iwr, 0, sizeof(iwr));
1647         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1648         iwr.u.data.pointer = (caddr_t) range;
1649         iwr.u.data.length = buflen;
1650
1651         minlen = ((char *) &range->enc_capa) - (char *) range +
1652                 sizeof(range->enc_capa);
1653
1654         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1655                 perror("ioctl[SIOCGIWRANGE]");
1656                 os_free(range);
1657                 return -1;
1658         } else if (iwr.u.data.length >= minlen &&
1659                    range->we_version_compiled >= 18) {
1660                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1661                            "WE(source)=%d enc_capa=0x%x",
1662                            range->we_version_compiled,
1663                            range->we_version_source,
1664                            range->enc_capa);
1665                 drv->has_capability = 1;
1666                 drv->we_version_compiled = range->we_version_compiled;
1667                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1668                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1669                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1670                 }
1671                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1672                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1673                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1674                 }
1675                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1676                         WPA_DRIVER_CAPA_ENC_WEP104;
1677                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1678                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1679                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1680                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1681                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1682                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1683
1684                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1685                            "flags 0x%x",
1686                            drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1687         } else {
1688                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1689                            "assuming WPA is not supported");
1690         }
1691
1692         os_free(range);
1693         return 0;
1694 }
1695
1696
1697 static int wpa_driver_wext_set_wpa(void *priv, int enabled)
1698 {
1699         struct wpa_driver_wext_data *drv = priv;
1700         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1701
1702         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1703                                               enabled);
1704 }
1705
1706
1707 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1708                                    const u8 *psk)
1709 {
1710         struct iw_encode_ext *ext;
1711         struct iwreq iwr;
1712         int ret;
1713
1714         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1715
1716         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1717                 return 0;
1718
1719         if (!psk)
1720                 return 0;
1721
1722         os_memset(&iwr, 0, sizeof(iwr));
1723         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1724
1725         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1726         if (ext == NULL)
1727                 return -1;
1728
1729         iwr.u.encoding.pointer = (caddr_t) ext;
1730         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1731         ext->key_len = PMK_LEN;
1732         os_memcpy(&ext->key, psk, ext->key_len);
1733         ext->alg = IW_ENCODE_ALG_PMK;
1734
1735         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1736         if (ret < 0)
1737                 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1738         os_free(ext);
1739
1740         return ret;
1741 }
1742
1743
1744 static int wpa_driver_wext_set_key_ext(void *priv, wpa_alg alg,
1745                                        const u8 *addr, int key_idx,
1746                                        int set_tx, const u8 *seq,
1747                                        size_t seq_len,
1748                                        const u8 *key, size_t key_len)
1749 {
1750         struct wpa_driver_wext_data *drv = priv;
1751         struct iwreq iwr;
1752         int ret = 0;
1753         struct iw_encode_ext *ext;
1754
1755         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1756                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1757                            __FUNCTION__, (unsigned long) seq_len);
1758                 return -1;
1759         }
1760
1761         ext = os_zalloc(sizeof(*ext) + key_len);
1762         if (ext == NULL)
1763                 return -1;
1764         os_memset(&iwr, 0, sizeof(iwr));
1765         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1766         iwr.u.encoding.flags = key_idx + 1;
1767         if (alg == WPA_ALG_NONE)
1768                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1769         iwr.u.encoding.pointer = (caddr_t) ext;
1770         iwr.u.encoding.length = sizeof(*ext) + key_len;
1771
1772         if (addr == NULL ||
1773             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1774                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1775         if (set_tx)
1776                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1777
1778         ext->addr.sa_family = ARPHRD_ETHER;
1779         if (addr)
1780                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1781         else
1782                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1783         if (key && key_len) {
1784                 os_memcpy(ext + 1, key, key_len);
1785                 ext->key_len = key_len;
1786         }
1787         switch (alg) {
1788         case WPA_ALG_NONE:
1789                 ext->alg = IW_ENCODE_ALG_NONE;
1790                 break;
1791         case WPA_ALG_WEP:
1792                 ext->alg = IW_ENCODE_ALG_WEP;
1793                 break;
1794         case WPA_ALG_TKIP:
1795                 ext->alg = IW_ENCODE_ALG_TKIP;
1796                 break;
1797         case WPA_ALG_CCMP:
1798                 ext->alg = IW_ENCODE_ALG_CCMP;
1799                 break;
1800         case WPA_ALG_PMK:
1801                 ext->alg = IW_ENCODE_ALG_PMK;
1802                 break;
1803 #ifdef CONFIG_IEEE80211W
1804         case WPA_ALG_IGTK:
1805                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1806                 break;
1807 #endif /* CONFIG_IEEE80211W */
1808         default:
1809                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1810                            __FUNCTION__, alg);
1811                 os_free(ext);
1812                 return -1;
1813         }
1814
1815         if (seq && seq_len) {
1816                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1817                 os_memcpy(ext->rx_seq, seq, seq_len);
1818         }
1819
1820         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1821                 ret = errno == EOPNOTSUPP ? -2 : -1;
1822                 if (errno == ENODEV) {
1823                         /*
1824                          * ndiswrapper seems to be returning incorrect error
1825                          * code.. */
1826                         ret = -2;
1827                 }
1828
1829                 perror("ioctl[SIOCSIWENCODEEXT]");
1830         }
1831
1832         os_free(ext);
1833         return ret;
1834 }
1835
1836
1837 /**
1838  * wpa_driver_wext_set_key - Configure encryption key
1839  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1840  * @priv: Private driver interface data
1841  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1842  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1843  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1844  *      broadcast/default keys
1845  * @key_idx: key index (0..3), usually 0 for unicast keys
1846  * @set_tx: Configure this key as the default Tx key (only used when
1847  *      driver does not support separate unicast/individual key
1848  * @seq: Sequence number/packet number, seq_len octets, the next
1849  *      packet number to be used for in replay protection; configured
1850  *      for Rx keys (in most cases, this is only used with broadcast
1851  *      keys and set to zero for unicast keys)
1852  * @seq_len: Length of the seq, depends on the algorithm:
1853  *      TKIP: 6 octets, CCMP: 6 octets
1854  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1855  *      8-byte Rx Mic Key
1856  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1857  *      TKIP: 32, CCMP: 16)
1858  * Returns: 0 on success, -1 on failure
1859  *
1860  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1861  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1862  */
1863 int wpa_driver_wext_set_key(void *priv, wpa_alg alg,
1864                             const u8 *addr, int key_idx,
1865                             int set_tx, const u8 *seq, size_t seq_len,
1866                             const u8 *key, size_t key_len)
1867 {
1868         struct wpa_driver_wext_data *drv = priv;
1869         struct iwreq iwr;
1870         int ret = 0;
1871
1872         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1873                    "key_len=%lu",
1874                    __FUNCTION__, alg, key_idx, set_tx,
1875                    (unsigned long) seq_len, (unsigned long) key_len);
1876
1877         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1878                                           seq, seq_len, key, key_len);
1879         if (ret == 0)
1880                 return 0;
1881
1882         if (ret == -2 &&
1883             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1884                 wpa_printf(MSG_DEBUG, "Driver did not support "
1885                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1886                 ret = 0;
1887         } else {
1888                 wpa_printf(MSG_DEBUG, "Driver did not support "
1889                            "SIOCSIWENCODEEXT");
1890                 return ret;
1891         }
1892
1893         os_memset(&iwr, 0, sizeof(iwr));
1894         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1895         iwr.u.encoding.flags = key_idx + 1;
1896         if (alg == WPA_ALG_NONE)
1897                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1898         iwr.u.encoding.pointer = (caddr_t) key;
1899         iwr.u.encoding.length = key_len;
1900
1901         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1902                 perror("ioctl[SIOCSIWENCODE]");
1903                 ret = -1;
1904         }
1905
1906         if (set_tx && alg != WPA_ALG_NONE) {
1907                 os_memset(&iwr, 0, sizeof(iwr));
1908                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1909                 iwr.u.encoding.flags = key_idx + 1;
1910                 iwr.u.encoding.pointer = (caddr_t) NULL;
1911                 iwr.u.encoding.length = 0;
1912                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1913                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1914                         ret = -1;
1915                 }
1916         }
1917
1918         return ret;
1919 }
1920
1921
1922 static int wpa_driver_wext_set_countermeasures(void *priv,
1923                                                int enabled)
1924 {
1925         struct wpa_driver_wext_data *drv = priv;
1926         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1927         return wpa_driver_wext_set_auth_param(drv,
1928                                               IW_AUTH_TKIP_COUNTERMEASURES,
1929                                               enabled);
1930 }
1931
1932
1933 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1934                                                 int enabled)
1935 {
1936         struct wpa_driver_wext_data *drv = priv;
1937         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1938         drv->use_crypt = enabled;
1939         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1940                                               enabled);
1941 }
1942
1943
1944 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1945                                 const u8 *addr, int cmd, int reason_code)
1946 {
1947         struct iwreq iwr;
1948         struct iw_mlme mlme;
1949         int ret = 0;
1950
1951         os_memset(&iwr, 0, sizeof(iwr));
1952         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1953         os_memset(&mlme, 0, sizeof(mlme));
1954         mlme.cmd = cmd;
1955         mlme.reason_code = reason_code;
1956         mlme.addr.sa_family = ARPHRD_ETHER;
1957         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1958         iwr.u.data.pointer = (caddr_t) &mlme;
1959         iwr.u.data.length = sizeof(mlme);
1960
1961         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1962                 perror("ioctl[SIOCSIWMLME]");
1963                 ret = -1;
1964         }
1965
1966         return ret;
1967 }
1968
1969
1970 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1971                                           int reason_code)
1972 {
1973         struct wpa_driver_wext_data *drv = priv;
1974         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1975         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1976 }
1977
1978
1979 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
1980                                         int reason_code)
1981 {
1982         struct wpa_driver_wext_data *drv = priv;
1983         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1984         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC,
1985                                     reason_code);
1986 }
1987
1988
1989 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
1990                                       size_t ie_len)
1991 {
1992         struct wpa_driver_wext_data *drv = priv;
1993         struct iwreq iwr;
1994         int ret = 0;
1995
1996         os_memset(&iwr, 0, sizeof(iwr));
1997         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1998         iwr.u.data.pointer = (caddr_t) ie;
1999         iwr.u.data.length = ie_len;
2000
2001         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2002                 perror("ioctl[SIOCSIWGENIE]");
2003                 ret = -1;
2004         }
2005
2006         return ret;
2007 }
2008
2009
2010 int wpa_driver_wext_cipher2wext(int cipher)
2011 {
2012         switch (cipher) {
2013         case CIPHER_NONE:
2014                 return IW_AUTH_CIPHER_NONE;
2015         case CIPHER_WEP40:
2016                 return IW_AUTH_CIPHER_WEP40;
2017         case CIPHER_TKIP:
2018                 return IW_AUTH_CIPHER_TKIP;
2019         case CIPHER_CCMP:
2020                 return IW_AUTH_CIPHER_CCMP;
2021         case CIPHER_WEP104:
2022                 return IW_AUTH_CIPHER_WEP104;
2023         default:
2024                 return 0;
2025         }
2026 }
2027
2028
2029 int wpa_driver_wext_keymgmt2wext(int keymgmt)
2030 {
2031         switch (keymgmt) {
2032         case KEY_MGMT_802_1X:
2033         case KEY_MGMT_802_1X_NO_WPA:
2034                 return IW_AUTH_KEY_MGMT_802_1X;
2035         case KEY_MGMT_PSK:
2036                 return IW_AUTH_KEY_MGMT_PSK;
2037         default:
2038                 return 0;
2039         }
2040 }
2041
2042
2043 static int
2044 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
2045                                   struct wpa_driver_associate_params *params)
2046 {
2047         struct iwreq iwr;
2048         int ret = 0;
2049
2050         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2051                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2052
2053         os_memset(&iwr, 0, sizeof(iwr));
2054         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2055         /* Just changing mode, not actual keys */
2056         iwr.u.encoding.flags = 0;
2057         iwr.u.encoding.pointer = (caddr_t) NULL;
2058         iwr.u.encoding.length = 0;
2059
2060         /*
2061          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2062          * different things. Here they are used to indicate Open System vs.
2063          * Shared Key authentication algorithm. However, some drivers may use
2064          * them to select between open/restricted WEP encrypted (open = allow
2065          * both unencrypted and encrypted frames; restricted = only allow
2066          * encrypted frames).
2067          */
2068
2069         if (!drv->use_crypt) {
2070                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2071         } else {
2072                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2073                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2074                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2075                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2076         }
2077
2078         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2079                 perror("ioctl[SIOCSIWENCODE]");
2080                 ret = -1;
2081         }
2082
2083         return ret;
2084 }
2085
2086
2087 int wpa_driver_wext_associate(void *priv,
2088                               struct wpa_driver_associate_params *params)
2089 {
2090         struct wpa_driver_wext_data *drv = priv;
2091         int ret = 0;
2092         int allow_unencrypted_eapol;
2093         int value;
2094
2095         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2096
2097         /*
2098          * If the driver did not support SIOCSIWAUTH, fallback to
2099          * SIOCSIWENCODE here.
2100          */
2101         if (drv->auth_alg_fallback &&
2102             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2103                 ret = -1;
2104
2105         if (!params->bssid &&
2106             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2107                 ret = -1;
2108
2109         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2110                 ret = -1;
2111         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2112          * from configuration, not from here, where only the selected suite is
2113          * available */
2114         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2115             < 0)
2116                 ret = -1;
2117         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2118                 value = IW_AUTH_WPA_VERSION_DISABLED;
2119         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2120                 value = IW_AUTH_WPA_VERSION_WPA2;
2121         else
2122                 value = IW_AUTH_WPA_VERSION_WPA;
2123         if (wpa_driver_wext_set_auth_param(drv,
2124                                            IW_AUTH_WPA_VERSION, value) < 0)
2125                 ret = -1;
2126         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2127         if (wpa_driver_wext_set_auth_param(drv,
2128                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2129                 ret = -1;
2130         value = wpa_driver_wext_cipher2wext(params->group_suite);
2131         if (wpa_driver_wext_set_auth_param(drv,
2132                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2133                 ret = -1;
2134         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2135         if (wpa_driver_wext_set_auth_param(drv,
2136                                            IW_AUTH_KEY_MGMT, value) < 0)
2137                 ret = -1;
2138         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2139                 params->pairwise_suite != CIPHER_NONE ||
2140                 params->group_suite != CIPHER_NONE ||
2141                 params->wpa_ie_len;
2142         if (wpa_driver_wext_set_auth_param(drv,
2143                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2144                 ret = -1;
2145
2146         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2147          * not using WPA. IEEE 802.1X specifies that these frames are not
2148          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2149         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2150             params->key_mgmt_suite == KEY_MGMT_PSK)
2151                 allow_unencrypted_eapol = 0;
2152         else
2153                 allow_unencrypted_eapol = 1;
2154
2155         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2156                 ret = -1;
2157         if (wpa_driver_wext_set_auth_param(drv,
2158                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2159                                            allow_unencrypted_eapol) < 0)
2160                 ret = -1;
2161 #ifdef CONFIG_IEEE80211W
2162         switch (params->mgmt_frame_protection) {
2163         case NO_MGMT_FRAME_PROTECTION:
2164                 value = IW_AUTH_MFP_DISABLED;
2165                 break;
2166         case MGMT_FRAME_PROTECTION_OPTIONAL:
2167                 value = IW_AUTH_MFP_OPTIONAL;
2168                 break;
2169         case MGMT_FRAME_PROTECTION_REQUIRED:
2170                 value = IW_AUTH_MFP_REQUIRED;
2171                 break;
2172         };
2173         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2174                 ret = -1;
2175 #endif /* CONFIG_IEEE80211W */
2176         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2177                 ret = -1;
2178         if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2179                 ret = -1;
2180         if (params->bssid &&
2181             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2182                 ret = -1;
2183
2184         return ret;
2185 }
2186
2187
2188 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2189 {
2190         struct wpa_driver_wext_data *drv = priv;
2191         int algs = 0, res;
2192
2193         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2194                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2195         if (auth_alg & AUTH_ALG_SHARED_KEY)
2196                 algs |= IW_AUTH_ALG_SHARED_KEY;
2197         if (auth_alg & AUTH_ALG_LEAP)
2198                 algs |= IW_AUTH_ALG_LEAP;
2199         if (algs == 0) {
2200                 /* at least one algorithm should be set */
2201                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2202         }
2203
2204         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2205                                              algs);
2206         drv->auth_alg_fallback = res == -2;
2207         return res;
2208 }
2209
2210
2211 /**
2212  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2213  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2214  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2215  * Returns: 0 on success, -1 on failure
2216  */
2217 int wpa_driver_wext_set_mode(void *priv, int mode)
2218 {
2219         struct wpa_driver_wext_data *drv = priv;
2220         struct iwreq iwr;
2221         int ret = -1, flags;
2222         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2223
2224         os_memset(&iwr, 0, sizeof(iwr));
2225         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2226         iwr.u.mode = new_mode;
2227         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2228                 ret = 0;
2229                 goto done;
2230         }
2231
2232         if (errno != EBUSY) {
2233                 perror("ioctl[SIOCSIWMODE]");
2234                 goto done;
2235         }
2236
2237         /* mac80211 doesn't allow mode changes while the device is up, so if
2238          * the device isn't in the mode we're about to change to, take device
2239          * down, try to set the mode again, and bring it back up.
2240          */
2241         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2242                 perror("ioctl[SIOCGIWMODE]");
2243                 goto done;
2244         }
2245
2246         if (iwr.u.mode == new_mode) {
2247                 ret = 0;
2248                 goto done;
2249         }
2250
2251         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2252                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2253
2254                 /* Try to set the mode again while the interface is down */
2255                 iwr.u.mode = new_mode;
2256                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2257                         perror("ioctl[SIOCSIWMODE]");
2258                 else
2259                         ret = 0;
2260
2261                 /* Ignore return value of get_ifflags to ensure that the device
2262                  * is always up like it was before this function was called.
2263                  */
2264                 (void) wpa_driver_wext_get_ifflags(drv, &flags);
2265                 (void) wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2266         }
2267
2268 done:
2269         return ret;
2270 }
2271
2272
2273 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2274                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2275 {
2276         struct iwreq iwr;
2277         struct iw_pmksa pmksa;
2278         int ret = 0;
2279
2280         os_memset(&iwr, 0, sizeof(iwr));
2281         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2282         os_memset(&pmksa, 0, sizeof(pmksa));
2283         pmksa.cmd = cmd;
2284         pmksa.bssid.sa_family = ARPHRD_ETHER;
2285         if (bssid)
2286                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2287         if (pmkid)
2288                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2289         iwr.u.data.pointer = (caddr_t) &pmksa;
2290         iwr.u.data.length = sizeof(pmksa);
2291
2292         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2293                 if (errno != EOPNOTSUPP)
2294                         perror("ioctl[SIOCSIWPMKSA]");
2295                 ret = -1;
2296         }
2297
2298         return ret;
2299 }
2300
2301
2302 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2303                                      const u8 *pmkid)
2304 {
2305         struct wpa_driver_wext_data *drv = priv;
2306         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2307 }
2308
2309
2310 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2311                                         const u8 *pmkid)
2312 {
2313         struct wpa_driver_wext_data *drv = priv;
2314         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2315 }
2316
2317
2318 static int wpa_driver_wext_flush_pmkid(void *priv)
2319 {
2320         struct wpa_driver_wext_data *drv = priv;
2321         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2322 }
2323
2324
2325 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2326 {
2327         struct wpa_driver_wext_data *drv = priv;
2328         if (!drv->has_capability)
2329                 return -1;
2330         os_memcpy(capa, &drv->capa, sizeof(*capa));
2331         return 0;
2332 }
2333
2334
2335 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2336                                         const char *ifname)
2337 {
2338         if (ifname == NULL) {
2339                 drv->ifindex2 = -1;
2340                 return 0;
2341         }
2342
2343         drv->ifindex2 = if_nametoindex(ifname);
2344         if (drv->ifindex2 <= 0)
2345                 return -1;
2346
2347         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2348                    "wireless events", drv->ifindex2, ifname);
2349
2350         return 0;
2351 }
2352
2353
2354 int wpa_driver_wext_set_operstate(void *priv, int state)
2355 {
2356         struct wpa_driver_wext_data *drv = priv;
2357
2358         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2359                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2360         drv->operstate = state;
2361         return wpa_driver_wext_send_oper_ifla(
2362                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2363 }
2364
2365
2366 #ifdef CONFIG_CLIENT_MLME
2367 static int hostapd_ioctl(struct wpa_driver_wext_data *drv,
2368                          struct prism2_hostapd_param *param, int len)
2369 {
2370         struct iwreq iwr;
2371
2372         os_memset(&iwr, 0, sizeof(iwr));
2373         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2374         iwr.u.data.pointer = (caddr_t) param;
2375         iwr.u.data.length = len;
2376
2377         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
2378                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2379                 return -1;
2380         }
2381
2382         return 0;
2383 }
2384
2385
2386 static struct wpa_hw_modes *
2387 wpa_driver_wext_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2388 {
2389         struct wpa_driver_wext_data *drv = priv;
2390         struct prism2_hostapd_param *param;
2391         u8 *pos, *end;
2392         struct wpa_hw_modes *modes = NULL;
2393         int i;
2394
2395         param = os_zalloc(PRISM2_HOSTAPD_MAX_BUF_SIZE);
2396         if (param == NULL)
2397                 return NULL;
2398         param->cmd = PRISM2_HOSTAPD_GET_HW_FEATURES;
2399
2400         if (hostapd_ioctl(drv, param, PRISM2_HOSTAPD_MAX_BUF_SIZE) < 0) {
2401                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2402                 goto out;
2403         }
2404
2405         *num_modes = param->u.hw_features.num_modes;
2406         *flags = param->u.hw_features.flags;
2407
2408         pos = param->u.hw_features.data;
2409         end = pos + PRISM2_HOSTAPD_MAX_BUF_SIZE -
2410                 (param->u.hw_features.data - (u8 *) param);
2411
2412         modes = os_zalloc(*num_modes * sizeof(struct wpa_hw_modes));
2413         if (modes == NULL)
2414                 goto out;
2415
2416         for (i = 0; i < *num_modes; i++) {
2417                 struct hostapd_ioctl_hw_modes_hdr *hdr;
2418                 struct wpa_hw_modes *feature;
2419                 int clen, rlen;
2420
2421                 hdr = (struct hostapd_ioctl_hw_modes_hdr *) pos;
2422                 pos = (u8 *) (hdr + 1);
2423                 clen = hdr->num_channels * sizeof(struct wpa_channel_data);
2424                 rlen = hdr->num_rates * sizeof(struct wpa_rate_data);
2425
2426                 feature = &modes[i];
2427                 switch (hdr->mode) {
2428                 case MODE_IEEE80211A:
2429                         feature->mode = WPA_MODE_IEEE80211A;
2430                         break;
2431                 case MODE_IEEE80211B:
2432                         feature->mode = WPA_MODE_IEEE80211B;
2433                         break;
2434                 case MODE_IEEE80211G:
2435                         feature->mode = WPA_MODE_IEEE80211G;
2436                         break;
2437                 case MODE_ATHEROS_TURBO:
2438                 case MODE_ATHEROS_TURBOG:
2439                         wpa_printf(MSG_ERROR, "Skip unsupported hw_mode=%d in "
2440                                    "get_hw_features data", hdr->mode);
2441                         pos += clen + rlen;
2442                         continue;
2443                 default:
2444                         wpa_printf(MSG_ERROR, "Unknown hw_mode=%d in "
2445                                    "get_hw_features data", hdr->mode);
2446                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2447                         modes = NULL;
2448                         break;
2449                 }
2450                 feature->num_channels = hdr->num_channels;
2451                 feature->num_rates = hdr->num_rates;
2452
2453                 feature->channels = os_malloc(clen);
2454                 feature->rates = os_malloc(rlen);
2455                 if (!feature->channels || !feature->rates ||
2456                     pos + clen + rlen > end) {
2457                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2458                         modes = NULL;
2459                         break;
2460                 }
2461
2462                 os_memcpy(feature->channels, pos, clen);
2463                 pos += clen;
2464                 os_memcpy(feature->rates, pos, rlen);
2465                 pos += rlen;
2466         }
2467
2468 out:
2469         os_free(param);
2470         return modes;
2471 }
2472
2473
2474 int wpa_driver_wext_set_channel(void *priv, wpa_hw_mode phymode, int chan,
2475                                 int freq)
2476 {
2477         return wpa_driver_wext_set_freq(priv, freq);
2478 }
2479
2480
2481 static void wpa_driver_wext_mlme_read(int sock, void *eloop_ctx,
2482                                       void *sock_ctx)
2483 {
2484         struct wpa_driver_wext_data *drv = eloop_ctx;
2485         int len;
2486         unsigned char buf[3000];
2487         struct ieee80211_frame_info *fi;
2488         struct ieee80211_rx_status rx_status;
2489
2490         len = recv(sock, buf, sizeof(buf), 0);
2491         if (len < 0) {
2492                 perror("recv[MLME]");
2493                 return;
2494         }
2495
2496         if (len < (int) sizeof(struct ieee80211_frame_info)) {
2497                 wpa_printf(MSG_DEBUG, "WEXT: Too short MLME frame (len=%d)",
2498                            len);
2499                 return;
2500         }
2501
2502         fi = (struct ieee80211_frame_info *) buf;
2503         if (ntohl(fi->version) != IEEE80211_FI_VERSION) {
2504                 wpa_printf(MSG_DEBUG, "WEXT: Invalid MLME frame info version "
2505                            "0x%x", ntohl(fi->version));
2506                 return;
2507         }
2508
2509         os_memset(&rx_status, 0, sizeof(rx_status));
2510         rx_status.ssi = ntohl(fi->ssi_signal);
2511         rx_status.channel = ntohl(fi->channel);
2512
2513         wpa_supplicant_sta_rx(drv->ctx,
2514                               buf + sizeof(struct ieee80211_frame_info),
2515                               len - sizeof(struct ieee80211_frame_info),
2516                               &rx_status);
2517 }
2518
2519
2520 static int wpa_driver_wext_open_mlme(struct wpa_driver_wext_data *drv)
2521 {
2522         int flags, ifindex, s;
2523         struct sockaddr_ll addr;
2524         struct ifreq ifr;
2525
2526         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_USER_SPACE_MLME, 1) <
2527             0) {
2528                 wpa_printf(MSG_ERROR, "WEXT: Failed to configure driver to "
2529                            "use user space MLME");
2530                 return -1;
2531         }
2532
2533         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_MGMT_IF, 1) < 0) {
2534                 wpa_printf(MSG_ERROR, "WEXT: Failed to add management "
2535                            "interface for user space MLME");
2536                 return -1;
2537         }
2538
2539         ifindex = wpa_driver_prism2_param_get(drv, PRISM2_PARAM_MGMT_IF);
2540         if (ifindex <= 0) {
2541                 wpa_printf(MSG_ERROR, "WEXT: MLME management device not "
2542                            "found");
2543                 return -1;
2544         }
2545
2546         os_memset(&ifr, 0, sizeof(ifr));
2547         ifr.ifr_ifindex = ifindex;
2548         if (ioctl(drv->ioctl_sock, SIOCGIFNAME, &ifr) != 0) {
2549                 perror("ioctl(SIOCGIFNAME)");
2550                 return -1;
2551         }
2552         os_strlcpy(drv->mlmedev, ifr.ifr_name, sizeof(drv->mlmedev));
2553         wpa_printf(MSG_DEBUG, "WEXT: MLME management device '%s'",
2554                    drv->mlmedev);
2555
2556         if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev, &flags) != 0
2557             || wpa_driver_wext_set_ifflags_ifname(drv, drv->mlmedev,
2558                                                   flags | IFF_UP) != 0) {
2559                 wpa_printf(MSG_ERROR, "WEXT: Could not set interface "
2560                            "'%s' UP", drv->mlmedev);
2561                 return -1;
2562         }
2563
2564         s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2565         if (s < 0) {
2566                 perror("socket[PF_PACKET,SOCK_RAW]");
2567                 return -1;
2568         }
2569
2570         os_memset(&addr, 0, sizeof(addr));
2571         addr.sll_family = AF_PACKET;
2572         addr.sll_ifindex = ifindex;
2573
2574         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
2575                 perror("bind(MLME)");
2576                 return -1;
2577         }
2578
2579         if (eloop_register_read_sock(s, wpa_driver_wext_mlme_read, drv, NULL))
2580         {
2581                 wpa_printf(MSG_ERROR, "WEXT: Could not register MLME read "
2582                            "socket");
2583                 close(s);
2584                 return -1;
2585         }
2586
2587         return s;
2588 }
2589
2590
2591 static int wpa_driver_wext_send_mlme(void *priv, const u8 *data,
2592                                      size_t data_len)
2593 {
2594         struct wpa_driver_wext_data *drv = priv;
2595         int ret;
2596
2597         ret = send(drv->mlme_sock, data, data_len, 0);
2598         if (ret < 0) {
2599                 perror("send[MLME]");
2600                 return -1;
2601         }
2602
2603         return 0;
2604 }
2605
2606
2607 static int wpa_driver_wext_mlme_add_sta(void *priv, const u8 *addr,
2608                                         const u8 *supp_rates,
2609                                         size_t supp_rates_len)
2610 {
2611         struct wpa_driver_wext_data *drv = priv;
2612         struct prism2_hostapd_param param;
2613         size_t len;
2614
2615         os_memset(&param, 0, sizeof(param));
2616         param.cmd = PRISM2_HOSTAPD_ADD_STA;
2617         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2618         len = supp_rates_len;
2619         if (len > sizeof(param.u.add_sta.supp_rates))
2620                 len = sizeof(param.u.add_sta.supp_rates);
2621         os_memcpy(param.u.add_sta.supp_rates, supp_rates, len);
2622         return hostapd_ioctl(drv, &param, sizeof(param));
2623 }
2624
2625
2626 static int wpa_driver_wext_mlme_remove_sta(void *priv, const u8 *addr)
2627 {
2628         struct wpa_driver_wext_data *drv = priv;
2629         struct prism2_hostapd_param param;
2630
2631         os_memset(&param, 0, sizeof(param));
2632         param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
2633         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2634         return hostapd_ioctl(drv, &param, sizeof(param));
2635 }
2636
2637 #endif /* CONFIG_CLIENT_MLME */
2638
2639
2640 static int wpa_driver_wext_set_param(void *priv, const char *param)
2641 {
2642 #ifdef CONFIG_CLIENT_MLME
2643         struct wpa_driver_wext_data *drv = priv;
2644
2645         if (param == NULL)
2646                 return 0;
2647
2648         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2649
2650         if (os_strstr(param, "use_mlme=1")) {
2651                 wpa_printf(MSG_DEBUG, "WEXT: Using user space MLME");
2652                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2653
2654                 drv->mlme_sock = wpa_driver_wext_open_mlme(drv);
2655                 if (drv->mlme_sock < 0)
2656                         return -1;
2657         }
2658 #endif /* CONFIG_CLIENT_MLME */
2659
2660         return 0;
2661 }
2662
2663
2664 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2665 {
2666         return drv->we_version_compiled;
2667 }
2668
2669
2670 const struct wpa_driver_ops wpa_driver_wext_ops = {
2671         .name = "wext",
2672         .desc = "Linux wireless extensions (generic)",
2673         .get_bssid = wpa_driver_wext_get_bssid,
2674         .get_ssid = wpa_driver_wext_get_ssid,
2675         .set_wpa = wpa_driver_wext_set_wpa,
2676         .set_key = wpa_driver_wext_set_key,
2677         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2678         .set_drop_unencrypted = wpa_driver_wext_set_drop_unencrypted,
2679         .scan = wpa_driver_wext_scan,
2680         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2681         .deauthenticate = wpa_driver_wext_deauthenticate,
2682         .disassociate = wpa_driver_wext_disassociate,
2683         .associate = wpa_driver_wext_associate,
2684         .set_auth_alg = wpa_driver_wext_set_auth_alg,
2685         .init = wpa_driver_wext_init,
2686         .deinit = wpa_driver_wext_deinit,
2687         .set_param = wpa_driver_wext_set_param,
2688         .add_pmkid = wpa_driver_wext_add_pmkid,
2689         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2690         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2691         .get_capa = wpa_driver_wext_get_capa,
2692         .set_operstate = wpa_driver_wext_set_operstate,
2693 #ifdef CONFIG_CLIENT_MLME
2694         .get_hw_feature_data = wpa_driver_wext_get_hw_feature_data,
2695         .set_channel = wpa_driver_wext_set_channel,
2696         .set_ssid = wpa_driver_wext_set_ssid,
2697         .set_bssid = wpa_driver_wext_set_bssid,
2698         .send_mlme = wpa_driver_wext_send_mlme,
2699         .mlme_add_sta = wpa_driver_wext_mlme_add_sta,
2700         .mlme_remove_sta = wpa_driver_wext_mlme_remove_sta,
2701 #endif /* CONFIG_CLIENT_MLME */
2702 };