src/drivers/driver_wext.c

   1 /*
   2  * WPA Supplicant - driver interaction with generic Linux Wireless Extensions
   3  * Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements a driver interface for the Linux Wireless Extensions.
  15  * When used with WE-18 or newer, this interface can be used as-is with number
  16  * of drivers. In addition to this, some of the common functions in this file
  17  * can be used by other driver interface implementations that use generic WE
  18  * ioctls, but require private ioctls for some of the functionality.
  19  */
  20
  21 #include "includes.h"
  22 #include <sys/ioctl.h>
  23 #include <net/if_arp.h>
  24
  25 #include "wireless_copy.h"
  26 #include "common.h"
  27 #include "driver.h"
  28 #include "eloop.h"
  29 #include "priv_netlink.h"
  30 #include "driver_wext.h"
  31 #include "ieee802_11_defs.h"
  32
  33 #ifdef CONFIG_CLIENT_MLME
  34 #include <netpacket/packet.h>
  35 /* old definitions from net/mac80211 */
  36
  37 typedef u32 __bitwise __be32;
  38 typedef u64 __bitwise __be64;
  39
  40 #define PRISM2_IOCTL_PRISM2_PARAM (SIOCIWFIRSTPRIV + 0)
  41 #define PRISM2_IOCTL_GET_PRISM2_PARAM (SIOCIWFIRSTPRIV + 1)
  42 #define PRISM2_IOCTL_HOSTAPD (SIOCIWFIRSTPRIV + 3)
  43
  44 #define PRISM2_PARAM_USER_SPACE_MLME 1045
  45 #define PRISM2_PARAM_MGMT_IF            1046
  46 #define PRISM2_HOSTAPD_ADD_STA 2
  47 #define PRISM2_HOSTAPD_REMOVE_STA 3
  48 #define PRISM2_HOSTAPD_GET_HW_FEATURES  1002
  49 #define PRISM2_HOSTAPD_MAX_BUF_SIZE     2048
  50
  51 #ifndef ALIGNED
  52 #define ALIGNED __attribute__ ((aligned))
  53 #endif
  54
  55 struct prism2_hostapd_param {
  56         u32 cmd;
  57         u8 sta_addr[ETH_ALEN];
  58         u8 pad[2];
  59         union {
  60                 struct {
  61                         u16 aid;
  62                         u16 capability;
  63                         u8 supp_rates[32];
  64                         u8 wds_flags;
  65 #define IEEE80211_STA_DYNAMIC_ENC BIT(0)
  66                         u8 enc_flags;
  67                         u16 listen_interval;
  68                 } add_sta;
  69                 struct {
  70                         u16 num_modes;
  71                         u16 flags;
  72                         u8 data[0] ALIGNED; /* num_modes * feature data */
  73                 } hw_features;
  74                 struct {
  75                         u16 mode; /* MODE_* */
  76                         u16 num_supported_rates;
  77                         u16 num_basic_rates;
  78                         u8 data[0] ALIGNED; /* num_supported_rates * u16 +
  79                                              * num_basic_rates * u16 */
  80                 } set_rate_sets;
  81                 struct {
  82                         u16 mode; /* MODE_* */
  83                         u16 chan;
  84                         u32 flag;
  85                         u8 power_level; /* regulatory limit in dBm */
  86                         u8 antenna_max;
  87                 } set_channel_flag;
  88                 struct {
  89                         u32 rd;
  90                 } set_regulatory_domain;
  91                 struct {
  92                         u32 queue;
  93                         s32 aifs;
  94                         u32 cw_min;
  95                         u32 cw_max;
  96                         u32 burst_time; /* maximum burst time in 0.1 ms, i.e.,
  97                                          * 10 = 1 ms */
  98                 } tx_queue_params;
  99         } u;
 100 };
 101
 102 struct hostapd_ioctl_hw_modes_hdr {
 103         int mode;
 104         int num_channels;
 105         int num_rates;
 106 };
 107
 108 /*
 109  * frame format for the management interface that is slated
 110  * to be replaced by "cooked monitor" with radiotap
 111  */
 112 #define IEEE80211_FI_VERSION 0x80211001
 113 struct ieee80211_frame_info {
 114         __be32 version;
 115         __be32 length;
 116         __be64 mactime;
 117         __be64 hosttime;
 118         __be32 phytype;
 119         __be32 channel;
 120         __be32 datarate;
 121         __be32 antenna;
 122         __be32 priority;
 123         __be32 ssi_type;
 124         __be32 ssi_signal;
 125         __be32 ssi_noise;
 126         __be32 preamble;
 127         __be32 encoding;
 128
 129         /* Note: this structure is otherwise identical to capture format used
 130          * in linux-wlan-ng, but this additional field is used to provide meta
 131          * data about the frame to hostapd. This was the easiest method for
 132          * providing this information, but this might change in the future. */
 133         __be32 msg_type;
 134 } __attribute__ ((packed));
 135
 136 /* old mode definitions */
 137 enum {
 138         MODE_IEEE80211A = 0 /* IEEE 802.11a */,
 139         MODE_IEEE80211B = 1 /* IEEE 802.11b only */,
 140         MODE_ATHEROS_TURBO = 2 /* Atheros Turbo mode (2x.11a at 5 GHz) */,
 141         MODE_IEEE80211G = 3 /* IEEE 802.11g (and 802.11b compatibility) */,
 142         MODE_ATHEROS_TURBOG = 4 /* Atheros Turbo mode (2x.11g at 2.4 GHz) */,
 143         NUM_IEEE80211_MODES = 5
 144 };
 145
 146 #ifndef ETH_P_ALL
 147 #define ETH_P_ALL 0x0003
 148 #endif
 149 #endif /* CONFIG_CLIENT_MLME */
 150
 151
 152
 153
 154 static int wpa_driver_wext_flush_pmkid(void *priv);
 155 static int wpa_driver_wext_get_range(void *priv);
 156
 157 static int wpa_driver_wext_send_oper_ifla(struct wpa_driver_wext_data *drv,
 158                                           int linkmode, int operstate)
 159 {
 160         struct {
 161                 struct nlmsghdr hdr;
 162                 struct ifinfomsg ifinfo;
 163                 char opts[16];
 164         } req;
 165         struct rtattr *rta;
 166         static int nl_seq;
 167         ssize_t ret;
 168
 169         os_memset(&req, 0, sizeof(req));
 170
 171         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 172         req.hdr.nlmsg_type = RTM_SETLINK;
 173         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 174         req.hdr.nlmsg_seq = ++nl_seq;
 175         req.hdr.nlmsg_pid = 0;
 176
 177         req.ifinfo.ifi_family = AF_UNSPEC;
 178         req.ifinfo.ifi_type = 0;
 179         req.ifinfo.ifi_index = drv->ifindex;
 180         req.ifinfo.ifi_flags = 0;
 181         req.ifinfo.ifi_change = 0;
 182
 183         if (linkmode != -1) {
 184                 rta = (struct rtattr *)
 185                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 186                 rta->rta_type = IFLA_LINKMODE;
 187                 rta->rta_len = RTA_LENGTH(sizeof(char));
 188                 *((char *) RTA_DATA(rta)) = linkmode;
 189                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 190                         RTA_LENGTH(sizeof(char));
 191         }
 192         if (operstate != -1) {
 193                 rta = (struct rtattr *)
 194                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 195                 rta->rta_type = IFLA_OPERSTATE;
 196                 rta->rta_len = RTA_LENGTH(sizeof(char));
 197                 *((char *) RTA_DATA(rta)) = operstate;
 198                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 199                         RTA_LENGTH(sizeof(char));
 200         }
 201
 202         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 203                    linkmode, operstate);
 204
 205         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 206         if (ret < 0) {
 207                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 208                            "%s (assume operstate is not supported)",
 209                            strerror(errno));
 210         }
 211
 212         return ret < 0 ? -1 : 0;
 213 }
 214
 215
 216 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
 217                                    int idx, u32 value)
 218 {
 219         struct iwreq iwr;
 220         int ret = 0;
 221
 222         os_memset(&iwr, 0, sizeof(iwr));
 223         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 224         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 225         iwr.u.param.value = value;
 226
 227         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 228                 if (errno != EOPNOTSUPP) {
 229                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 230                                    "value 0x%x) failed: %s)",
 231                                    idx, value, strerror(errno));
 232                 }
 233                 ret = errno == EOPNOTSUPP ? -2 : -1;
 234         }
 235
 236         return ret;
 237 }
 238
 239
 240 /**
 241  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
 242  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 243  * @bssid: Buffer for BSSID
 244  * Returns: 0 on success, -1 on failure
 245  */
 246 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
 247 {
 248         struct wpa_driver_wext_data *drv = priv;
 249         struct iwreq iwr;
 250         int ret = 0;
 251
 252         os_memset(&iwr, 0, sizeof(iwr));
 253         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 254
 255         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 256                 perror("ioctl[SIOCGIWAP]");
 257                 ret = -1;
 258         }
 259         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 260
 261         return ret;
 262 }
 263
 264
 265 /**
 266  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
 267  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 268  * @bssid: BSSID
 269  * Returns: 0 on success, -1 on failure
 270  */
 271 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
 272 {
 273         struct wpa_driver_wext_data *drv = priv;
 274         struct iwreq iwr;
 275         int ret = 0;
 276
 277         os_memset(&iwr, 0, sizeof(iwr));
 278         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 279         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 280         if (bssid)
 281                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 282         else
 283                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 284
 285         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 286                 perror("ioctl[SIOCSIWAP]");
 287                 ret = -1;
 288         }
 289
 290         return ret;
 291 }
 292
 293
 294 /**
 295  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 296  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 297  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 298  * Returns: SSID length on success, -1 on failure
 299  */
 300 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 301 {
 302         struct wpa_driver_wext_data *drv = priv;
 303         struct iwreq iwr;
 304         int ret = 0;
 305
 306         os_memset(&iwr, 0, sizeof(iwr));
 307         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 308         iwr.u.essid.pointer = (caddr_t) ssid;
 309         iwr.u.essid.length = 32;
 310
 311         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 312                 perror("ioctl[SIOCGIWESSID]");
 313                 ret = -1;
 314         } else {
 315                 ret = iwr.u.essid.length;
 316                 if (ret > 32)
 317                         ret = 32;
 318                 /* Some drivers include nul termination in the SSID, so let's
 319                  * remove it here before further processing. WE-21 changes this
 320                  * to explicitly require the length _not_ to include nul
 321                  * termination. */
 322                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 323                     drv->we_version_compiled < 21)
 324                         ret--;
 325         }
 326
 327         return ret;
 328 }
 329
 330
 331 /**
 332  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 333  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 334  * @ssid: SSID
 335  * @ssid_len: Length of SSID (0..32)
 336  * Returns: 0 on success, -1 on failure
 337  */
 338 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 339 {
 340         struct wpa_driver_wext_data *drv = priv;
 341         struct iwreq iwr;
 342         int ret = 0;
 343         char buf[33];
 344
 345         if (ssid_len > 32)
 346                 return -1;
 347
 348         os_memset(&iwr, 0, sizeof(iwr));
 349         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 350         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 351         iwr.u.essid.flags = (ssid_len != 0);
 352         os_memset(buf, 0, sizeof(buf));
 353         os_memcpy(buf, ssid, ssid_len);
 354         iwr.u.essid.pointer = (caddr_t) buf;
 355         if (drv->we_version_compiled < 21) {
 356                 /* For historic reasons, set SSID length to include one extra
 357                  * character, C string nul termination, even though SSID is
 358                  * really an octet string that should not be presented as a C
 359                  * string. Some Linux drivers decrement the length by one and
 360                  * can thus end up missing the last octet of the SSID if the
 361                  * length is not incremented here. WE-21 changes this to
 362                  * explicitly require the length _not_ to include nul
 363                  * termination. */
 364                 if (ssid_len)
 365                         ssid_len++;
 366         }
 367         iwr.u.essid.length = ssid_len;
 368
 369         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 370                 perror("ioctl[SIOCSIWESSID]");
 371                 ret = -1;
 372         }
 373
 374         return ret;
 375 }
 376
 377
 378 /**
 379  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 380  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 381  * @freq: Frequency in MHz
 382  * Returns: 0 on success, -1 on failure
 383  */
 384 int wpa_driver_wext_set_freq(void *priv, int freq)
 385 {
 386         struct wpa_driver_wext_data *drv = priv;
 387         struct iwreq iwr;
 388         int ret = 0;
 389
 390         os_memset(&iwr, 0, sizeof(iwr));
 391         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 392         iwr.u.freq.m = freq * 100000;
 393         iwr.u.freq.e = 1;
 394
 395         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 396                 perror("ioctl[SIOCSIWFREQ]");
 397                 ret = -1;
 398         }
 399
 400         return ret;
 401 }
 402
 403
 404 static void
 405 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 406 {
 407         union wpa_event_data data;
 408
 409         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 410                    custom);
 411
 412         os_memset(&data, 0, sizeof(data));
 413         /* Host AP driver */
 414         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 415                 data.michael_mic_failure.unicast =
 416                         os_strstr(custom, " unicast ") != NULL;
 417                 /* TODO: parse parameters(?) */
 418                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 419         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 420                 char *spos;
 421                 int bytes;
 422
 423                 spos = custom + 17;
 424
 425                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 426                 if (!bytes || (bytes & 1))
 427                         return;
 428                 bytes /= 2;
 429
 430                 data.assoc_info.req_ies = os_malloc(bytes);
 431                 if (data.assoc_info.req_ies == NULL)
 432                         return;
 433
 434                 data.assoc_info.req_ies_len = bytes;
 435                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 436
 437                 spos += bytes * 2;
 438
 439                 data.assoc_info.resp_ies = NULL;
 440                 data.assoc_info.resp_ies_len = 0;
 441
 442                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 443                         spos += 9;
 444
 445                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 446                         if (!bytes || (bytes & 1))
 447                                 goto done;
 448                         bytes /= 2;
 449
 450                         data.assoc_info.resp_ies = os_malloc(bytes);
 451                         if (data.assoc_info.resp_ies == NULL)
 452                                 goto done;
 453
 454                         data.assoc_info.resp_ies_len = bytes;
 455                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 456                 }
 457
 458                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 459
 460         done:
 461                 os_free(data.assoc_info.resp_ies);
 462                 os_free(data.assoc_info.req_ies);
 463 #ifdef CONFIG_PEERKEY
 464         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 465                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 466                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 467                                    "STKSTART.request '%s'", custom + 17);
 468                         return;
 469                 }
 470                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 471 #endif /* CONFIG_PEERKEY */
 472         }
 473 }
 474
 475
 476 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 477         void *ctx, const char *ev, size_t len)
 478 {
 479         const struct iw_michaelmicfailure *mic;
 480         union wpa_event_data data;
 481
 482         if (len < sizeof(*mic))
 483                 return -1;
 484
 485         mic = (const struct iw_michaelmicfailure *) ev;
 486
 487         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 488                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 489                    MAC2STR(mic->src_addr.sa_data));
 490
 491         os_memset(&data, 0, sizeof(data));
 492         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 493         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 494
 495         return 0;
 496 }
 497
 498
 499 static int wpa_driver_wext_event_wireless_pmkidcand(
 500         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 501 {
 502         const struct iw_pmkid_cand *cand;
 503         union wpa_event_data data;
 504         const u8 *addr;
 505
 506         if (len < sizeof(*cand))
 507                 return -1;
 508
 509         cand = (const struct iw_pmkid_cand *) ev;
 510         addr = (const u8 *) cand->bssid.sa_data;
 511
 512         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 513                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 514                    cand->index, MAC2STR(addr));
 515
 516         os_memset(&data, 0, sizeof(data));
 517         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 518         data.pmkid_candidate.index = cand->index;
 519         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 520         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 521
 522         return 0;
 523 }
 524
 525
 526 static int wpa_driver_wext_event_wireless_assocreqie(
 527         struct wpa_driver_wext_data *drv, const char *ev, int len)
 528 {
 529         if (len < 0)
 530                 return -1;
 531
 532         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 533                     len);
 534         os_free(drv->assoc_req_ies);
 535         drv->assoc_req_ies = os_malloc(len);
 536         if (drv->assoc_req_ies == NULL) {
 537                 drv->assoc_req_ies_len = 0;
 538                 return -1;
 539         }
 540         os_memcpy(drv->assoc_req_ies, ev, len);
 541         drv->assoc_req_ies_len = len;
 542
 543         return 0;
 544 }
 545
 546
 547 static int wpa_driver_wext_event_wireless_assocrespie(
 548         struct wpa_driver_wext_data *drv, const char *ev, int len)
 549 {
 550         if (len < 0)
 551                 return -1;
 552
 553         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 554                     len);
 555         os_free(drv->assoc_resp_ies);
 556         drv->assoc_resp_ies = os_malloc(len);
 557         if (drv->assoc_resp_ies == NULL) {
 558                 drv->assoc_resp_ies_len = 0;
 559                 return -1;
 560         }
 561         os_memcpy(drv->assoc_resp_ies, ev, len);
 562         drv->assoc_resp_ies_len = len;
 563
 564         return 0;
 565 }
 566
 567
 568 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 569 {
 570         union wpa_event_data data;
 571
 572         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 573                 return;
 574
 575         os_memset(&data, 0, sizeof(data));
 576         if (drv->assoc_req_ies) {
 577                 data.assoc_info.req_ies = drv->assoc_req_ies;
 578                 drv->assoc_req_ies = NULL;
 579                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 580         }
 581         if (drv->assoc_resp_ies) {
 582                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 583                 drv->assoc_resp_ies = NULL;
 584                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 585         }
 586
 587         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 588
 589         os_free(data.assoc_info.req_ies);
 590         os_free(data.assoc_info.resp_ies);
 591 }
 592
 593
 594 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 595                                            void *ctx, char *data, int len)
 596 {
 597         struct iw_event iwe_buf, *iwe = &iwe_buf;
 598         char *pos, *end, *custom, *buf;
 599
 600         pos = data;
 601         end = data + len;
 602
 603         while (pos + IW_EV_LCP_LEN <= end) {
 604                 /* Event data may be unaligned, so make a local, aligned copy
 605                  * before processing. */
 606                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 607                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 608                            iwe->cmd, iwe->len);
 609                 if (iwe->len <= IW_EV_LCP_LEN)
 610                         return;
 611
 612                 custom = pos + IW_EV_POINT_LEN;
 613                 if (drv->we_version_compiled > 18 &&
 614                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 615                      iwe->cmd == IWEVCUSTOM ||
 616                      iwe->cmd == IWEVASSOCREQIE ||
 617                      iwe->cmd == IWEVASSOCRESPIE ||
 618                      iwe->cmd == IWEVPMKIDCAND)) {
 619                         /* WE-19 removed the pointer from struct iw_point */
 620                         char *dpos = (char *) &iwe_buf.u.data.length;
 621                         int dlen = dpos - (char *) &iwe_buf;
 622                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 623                                   sizeof(struct iw_event) - dlen);
 624                 } else {
 625                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 626                         custom += IW_EV_POINT_OFF;
 627                 }
 628
 629                 switch (iwe->cmd) {
 630                 case SIOCGIWAP:
 631                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 632                                    MACSTR,
 633                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 634                         if (os_memcmp(iwe->u.ap_addr.sa_data,
 635                                       "\x00\x00\x00\x00\x00\x00", ETH_ALEN) ==
 636                             0 ||
 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.
1298                  */
1299                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1300                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1301                         return;
1302                 } else if (iwe->u.freq.m == 14) {
1303                         res->res.freq = 2484;
1304                         return;
1305                 }
1306         }
1307
1308         if (iwe->u.freq.e > 6) {
1309                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1310                            MACSTR " m=%d e=%d)",
1311                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1312                            iwe->u.freq.e);
1313                 return;
1314         }
1315
1316         for (i = 0; i < iwe->u.freq.e; i++)
1317                 divi /= 10;
1318         res->res.freq = iwe->u.freq.m / divi;
1319 }
1320
1321
1322 static void wext_get_scan_qual(struct iw_event *iwe,
1323                                struct wext_scan_data *res)
1324 {
1325         res->res.qual = iwe->u.qual.qual;
1326         res->res.noise = iwe->u.qual.noise;
1327         res->res.level = iwe->u.qual.level;
1328 }
1329
1330
1331 static void wext_get_scan_encode(struct iw_event *iwe,
1332                                  struct wext_scan_data *res)
1333 {
1334         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1335                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1336 }
1337
1338
1339 static void wext_get_scan_rate(struct iw_event *iwe,
1340                                struct wext_scan_data *res, char *pos,
1341                                char *end)
1342 {
1343         int maxrate;
1344         char *custom = pos + IW_EV_LCP_LEN;
1345         struct iw_param p;
1346         size_t clen;
1347
1348         clen = iwe->len;
1349         if (custom + clen > end)
1350                 return;
1351         maxrate = 0;
1352         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1353                 /* Note: may be misaligned, make a local, aligned copy */
1354                 os_memcpy(&p, custom, sizeof(struct iw_param));
1355                 if (p.value > maxrate)
1356                         maxrate = p.value;
1357                 clen -= sizeof(struct iw_param);
1358                 custom += sizeof(struct iw_param);
1359         }
1360         res->maxrate = maxrate;
1361 }
1362
1363
1364 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1365                                     struct wext_scan_data *res, char *custom,
1366                                     char *end)
1367 {
1368         char *genie, *gpos, *gend;
1369         u8 *tmp;
1370
1371         gpos = genie = custom;
1372         gend = genie + iwe->u.data.length;
1373         if (gend > end) {
1374                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1375                 return;
1376         }
1377
1378         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1379         if (tmp == NULL)
1380                 return;
1381         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1382         res->ie = tmp;
1383         res->ie_len += gend - gpos;
1384 }
1385
1386
1387 static void wext_get_scan_custom(struct iw_event *iwe,
1388                                  struct wext_scan_data *res, char *custom,
1389                                  char *end)
1390 {
1391         size_t clen;
1392         u8 *tmp;
1393
1394         clen = iwe->u.data.length;
1395         if (custom + clen > end)
1396                 return;
1397
1398         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1399                 char *spos;
1400                 int bytes;
1401                 spos = custom + 7;
1402                 bytes = custom + clen - spos;
1403                 if (bytes & 1)
1404                         return;
1405                 bytes /= 2;
1406                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1407                 if (tmp == NULL)
1408                         return;
1409                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1410                 res->ie = tmp;
1411                 res->ie_len += bytes;
1412         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1413                 char *spos;
1414                 int bytes;
1415                 spos = custom + 7;
1416                 bytes = custom + clen - spos;
1417                 if (bytes & 1)
1418                         return;
1419                 bytes /= 2;
1420                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1421                 if (tmp == NULL)
1422                         return;
1423                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1424                 res->ie = tmp;
1425                 res->ie_len += bytes;
1426         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1427                 char *spos;
1428                 int bytes;
1429                 u8 bin[8];
1430                 spos = custom + 4;
1431                 bytes = custom + clen - spos;
1432                 if (bytes != 16) {
1433                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1434                         return;
1435                 }
1436                 bytes /= 2;
1437                 hexstr2bin(spos, bin, bytes);
1438                 res->res.tsf += WPA_GET_BE64(bin);
1439         }
1440 }
1441
1442
1443 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1444 {
1445         return drv->we_version_compiled > 18 &&
1446                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1447                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1448 }
1449
1450
1451 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1452                                            struct wext_scan_data *data)
1453 {
1454         struct wpa_scan_res **tmp;
1455         struct wpa_scan_res *r;
1456         size_t extra_len;
1457         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1458
1459         /* Figure out whether we need to fake any IEs */
1460         pos = data->ie;
1461         end = pos + data->ie_len;
1462         while (pos && pos + 1 < end) {
1463                 if (pos + 2 + pos[1] > end)
1464                         break;
1465                 if (pos[0] == WLAN_EID_SSID)
1466                         ssid_ie = pos;
1467                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1468                         rate_ie = pos;
1469                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1470                         rate_ie = pos;
1471                 pos += 2 + pos[1];
1472         }
1473
1474         extra_len = 0;
1475         if (ssid_ie == NULL)
1476                 extra_len += 2 + data->ssid_len;
1477         if (rate_ie == NULL && data->maxrate)
1478                 extra_len += 3;
1479
1480         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1481         if (r == NULL)
1482                 return;
1483         os_memcpy(r, &data->res, sizeof(*r));
1484         r->ie_len = extra_len + data->ie_len;
1485         pos = (u8 *) (r + 1);
1486         if (ssid_ie == NULL) {
1487                 /*
1488                  * Generate a fake SSID IE since the driver did not report
1489                  * a full IE list.
1490                  */
1491                 *pos++ = WLAN_EID_SSID;
1492                 *pos++ = data->ssid_len;
1493                 os_memcpy(pos, data->ssid, data->ssid_len);
1494                 pos += data->ssid_len;
1495         }
1496         if (rate_ie == NULL && data->maxrate) {
1497                 /*
1498                  * Generate a fake Supported Rates IE since the driver did not
1499                  * report a full IE list.
1500                  */
1501                 *pos++ = WLAN_EID_SUPP_RATES;
1502                 *pos++ = 1;
1503                 *pos++ = data->maxrate;
1504         }
1505         if (data->ie)
1506                 os_memcpy(pos, data->ie, data->ie_len);
1507
1508         tmp = os_realloc(res->res,
1509                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1510         if (tmp == NULL) {
1511                 os_free(r);
1512                 return;
1513         }
1514         tmp[res->num++] = r;
1515         res->res = tmp;
1516 }
1517
1518
1519 /**
1520  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1521  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1522  * Returns: Scan results on success, -1 on failure
1523  */
1524 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1525 {
1526         struct wpa_driver_wext_data *drv = priv;
1527         size_t ap_num = 0, len;
1528         int first;
1529         u8 *res_buf;
1530         struct iw_event iwe_buf, *iwe = &iwe_buf;
1531         char *pos, *end, *custom;
1532         struct wpa_scan_results *res;
1533         struct wext_scan_data data;
1534
1535         res_buf = wpa_driver_wext_giwscan(drv, &len);
1536         if (res_buf == NULL)
1537                 return NULL;
1538
1539         ap_num = 0;
1540         first = 1;
1541
1542         res = os_zalloc(sizeof(*res));
1543         if (res == NULL) {
1544                 os_free(res_buf);
1545                 return NULL;
1546         }
1547
1548         pos = (char *) res_buf;
1549         end = (char *) res_buf + len;
1550         os_memset(&data, 0, sizeof(data));
1551
1552         while (pos + IW_EV_LCP_LEN <= end) {
1553                 /* Event data may be unaligned, so make a local, aligned copy
1554                  * before processing. */
1555                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1556                 if (iwe->len <= IW_EV_LCP_LEN)
1557                         break;
1558
1559                 custom = pos + IW_EV_POINT_LEN;
1560                 if (wext_19_iw_point(drv, iwe->cmd)) {
1561                         /* WE-19 removed the pointer from struct iw_point */
1562                         char *dpos = (char *) &iwe_buf.u.data.length;
1563                         int dlen = dpos - (char *) &iwe_buf;
1564                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1565                                   sizeof(struct iw_event) - dlen);
1566                 } else {
1567                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1568                         custom += IW_EV_POINT_OFF;
1569                 }
1570
1571                 switch (iwe->cmd) {
1572                 case SIOCGIWAP:
1573                         if (!first)
1574                                 wpa_driver_wext_add_scan_entry(res, &data);
1575                         first = 0;
1576                         os_free(data.ie);
1577                         os_memset(&data, 0, sizeof(data));
1578                         os_memcpy(data.res.bssid,
1579                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1580                         break;
1581                 case SIOCGIWMODE:
1582                         wext_get_scan_mode(iwe, &data);
1583                         break;
1584                 case SIOCGIWESSID:
1585                         wext_get_scan_ssid(iwe, &data, custom, end);
1586                         break;
1587                 case SIOCGIWFREQ:
1588                         wext_get_scan_freq(iwe, &data);
1589                         break;
1590                 case IWEVQUAL:
1591                         wext_get_scan_qual(iwe, &data);
1592                         break;
1593                 case SIOCGIWENCODE:
1594                         wext_get_scan_encode(iwe, &data);
1595                         break;
1596                 case SIOCGIWRATE:
1597                         wext_get_scan_rate(iwe, &data, pos, end);
1598                         break;
1599                 case IWEVGENIE:
1600                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1601                         break;
1602                 case IWEVCUSTOM:
1603                         wext_get_scan_custom(iwe, &data, custom, end);
1604                         break;
1605                 }
1606
1607                 pos += iwe->len;
1608         }
1609         os_free(res_buf);
1610         res_buf = NULL;
1611         if (!first)
1612                 wpa_driver_wext_add_scan_entry(res, &data);
1613         os_free(data.ie);
1614
1615         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1616                    (unsigned long) len, (unsigned long) res->num);
1617
1618         return res;
1619 }
1620
1621
1622 static int wpa_driver_wext_get_range(void *priv)
1623 {
1624         struct wpa_driver_wext_data *drv = priv;
1625         struct iw_range *range;
1626         struct iwreq iwr;
1627         int minlen;
1628         size_t buflen;
1629
1630         /*
1631          * Use larger buffer than struct iw_range in order to allow the
1632          * structure to grow in the future.
1633          */
1634         buflen = sizeof(struct iw_range) + 500;
1635         range = os_zalloc(buflen);
1636         if (range == NULL)
1637                 return -1;
1638
1639         os_memset(&iwr, 0, sizeof(iwr));
1640         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1641         iwr.u.data.pointer = (caddr_t) range;
1642         iwr.u.data.length = buflen;
1643
1644         minlen = ((char *) &range->enc_capa) - (char *) range +
1645                 sizeof(range->enc_capa);
1646
1647         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1648                 perror("ioctl[SIOCGIWRANGE]");
1649                 os_free(range);
1650                 return -1;
1651         } else if (iwr.u.data.length >= minlen &&
1652                    range->we_version_compiled >= 18) {
1653                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1654                            "WE(source)=%d enc_capa=0x%x",
1655                            range->we_version_compiled,
1656                            range->we_version_source,
1657                            range->enc_capa);
1658                 drv->has_capability = 1;
1659                 drv->we_version_compiled = range->we_version_compiled;
1660                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1661                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1662                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1663                 }
1664                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1665                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1666                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1667                 }
1668                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1669                         WPA_DRIVER_CAPA_ENC_WEP104;
1670                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1671                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1672                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1673                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1674                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
1675                            drv->capa.key_mgmt, drv->capa.enc);
1676         } else {
1677                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1678                            "assuming WPA is not supported");
1679         }
1680
1681         os_free(range);
1682         return 0;
1683 }
1684
1685
1686 static int wpa_driver_wext_set_wpa(void *priv, int enabled)
1687 {
1688         struct wpa_driver_wext_data *drv = priv;
1689         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1690
1691         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1692                                               enabled);
1693 }
1694
1695
1696 static int wpa_driver_wext_set_key_ext(void *priv, wpa_alg alg,
1697                                        const u8 *addr, int key_idx,
1698                                        int set_tx, const u8 *seq,
1699                                        size_t seq_len,
1700                                        const u8 *key, size_t key_len)
1701 {
1702         struct wpa_driver_wext_data *drv = priv;
1703         struct iwreq iwr;
1704         int ret = 0;
1705         struct iw_encode_ext *ext;
1706
1707         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1708                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1709                            __FUNCTION__, (unsigned long) seq_len);
1710                 return -1;
1711         }
1712
1713         ext = os_zalloc(sizeof(*ext) + key_len);
1714         if (ext == NULL)
1715                 return -1;
1716         os_memset(&iwr, 0, sizeof(iwr));
1717         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1718         iwr.u.encoding.flags = key_idx + 1;
1719         if (alg == WPA_ALG_NONE)
1720                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1721         iwr.u.encoding.pointer = (caddr_t) ext;
1722         iwr.u.encoding.length = sizeof(*ext) + key_len;
1723
1724         if (addr == NULL ||
1725             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1726                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1727         if (set_tx)
1728                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1729
1730         ext->addr.sa_family = ARPHRD_ETHER;
1731         if (addr)
1732                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1733         else
1734                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1735         if (key && key_len) {
1736                 os_memcpy(ext + 1, key, key_len);
1737                 ext->key_len = key_len;
1738         }
1739         switch (alg) {
1740         case WPA_ALG_NONE:
1741                 ext->alg = IW_ENCODE_ALG_NONE;
1742                 break;
1743         case WPA_ALG_WEP:
1744                 ext->alg = IW_ENCODE_ALG_WEP;
1745                 break;
1746         case WPA_ALG_TKIP:
1747                 ext->alg = IW_ENCODE_ALG_TKIP;
1748                 break;
1749         case WPA_ALG_CCMP:
1750                 ext->alg = IW_ENCODE_ALG_CCMP;
1751                 break;
1752         default:
1753                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1754                            __FUNCTION__, alg);
1755                 os_free(ext);
1756                 return -1;
1757         }
1758
1759         if (seq && seq_len) {
1760                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1761                 os_memcpy(ext->rx_seq, seq, seq_len);
1762         }
1763
1764         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1765                 ret = errno == EOPNOTSUPP ? -2 : -1;
1766                 if (errno == ENODEV) {
1767                         /*
1768                          * ndiswrapper seems to be returning incorrect error
1769                          * code.. */
1770                         ret = -2;
1771                 }
1772
1773                 perror("ioctl[SIOCSIWENCODEEXT]");
1774         }
1775
1776         os_free(ext);
1777         return ret;
1778 }
1779
1780
1781 /**
1782  * wpa_driver_wext_set_key - Configure encryption key
1783  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1784  * @priv: Private driver interface data
1785  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1786  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1787  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1788  *      broadcast/default keys
1789  * @key_idx: key index (0..3), usually 0 for unicast keys
1790  * @set_tx: Configure this key as the default Tx key (only used when
1791  *      driver does not support separate unicast/individual key
1792  * @seq: Sequence number/packet number, seq_len octets, the next
1793  *      packet number to be used for in replay protection; configured
1794  *      for Rx keys (in most cases, this is only used with broadcast
1795  *      keys and set to zero for unicast keys)
1796  * @seq_len: Length of the seq, depends on the algorithm:
1797  *      TKIP: 6 octets, CCMP: 6 octets
1798  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1799  *      8-byte Rx Mic Key
1800  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1801  *      TKIP: 32, CCMP: 16)
1802  * Returns: 0 on success, -1 on failure
1803  *
1804  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1805  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1806  */
1807 int wpa_driver_wext_set_key(void *priv, wpa_alg alg,
1808                             const u8 *addr, int key_idx,
1809                             int set_tx, const u8 *seq, size_t seq_len,
1810                             const u8 *key, size_t key_len)
1811 {
1812         struct wpa_driver_wext_data *drv = priv;
1813         struct iwreq iwr;
1814         int ret = 0;
1815
1816         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1817                    "key_len=%lu",
1818                    __FUNCTION__, alg, key_idx, set_tx,
1819                    (unsigned long) seq_len, (unsigned long) key_len);
1820
1821         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1822                                           seq, seq_len, key, key_len);
1823         if (ret == 0)
1824                 return 0;
1825
1826         if (ret == -2 &&
1827             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1828                 wpa_printf(MSG_DEBUG, "Driver did not support "
1829                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1830                 ret = 0;
1831         } else {
1832                 wpa_printf(MSG_DEBUG, "Driver did not support "
1833                            "SIOCSIWENCODEEXT");
1834                 return ret;
1835         }
1836
1837         os_memset(&iwr, 0, sizeof(iwr));
1838         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1839         iwr.u.encoding.flags = key_idx + 1;
1840         if (alg == WPA_ALG_NONE)
1841                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1842         iwr.u.encoding.pointer = (caddr_t) key;
1843         iwr.u.encoding.length = key_len;
1844
1845         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1846                 perror("ioctl[SIOCSIWENCODE]");
1847                 ret = -1;
1848         }
1849
1850         if (set_tx && alg != WPA_ALG_NONE) {
1851                 os_memset(&iwr, 0, sizeof(iwr));
1852                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1853                 iwr.u.encoding.flags = key_idx + 1;
1854                 iwr.u.encoding.pointer = (caddr_t) NULL;
1855                 iwr.u.encoding.length = 0;
1856                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1857                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1858                         ret = -1;
1859                 }
1860         }
1861
1862         return ret;
1863 }
1864
1865
1866 static int wpa_driver_wext_set_countermeasures(void *priv,
1867                                                int enabled)
1868 {
1869         struct wpa_driver_wext_data *drv = priv;
1870         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1871         return wpa_driver_wext_set_auth_param(drv,
1872                                               IW_AUTH_TKIP_COUNTERMEASURES,
1873                                               enabled);
1874 }
1875
1876
1877 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1878                                                 int enabled)
1879 {
1880         struct wpa_driver_wext_data *drv = priv;
1881         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1882         drv->use_crypt = enabled;
1883         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1884                                               enabled);
1885 }
1886
1887
1888 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1889                                 const u8 *addr, int cmd, int reason_code)
1890 {
1891         struct iwreq iwr;
1892         struct iw_mlme mlme;
1893         int ret = 0;
1894
1895         os_memset(&iwr, 0, sizeof(iwr));
1896         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1897         os_memset(&mlme, 0, sizeof(mlme));
1898         mlme.cmd = cmd;
1899         mlme.reason_code = reason_code;
1900         mlme.addr.sa_family = ARPHRD_ETHER;
1901         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1902         iwr.u.data.pointer = (caddr_t) &mlme;
1903         iwr.u.data.length = sizeof(mlme);
1904
1905         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1906                 perror("ioctl[SIOCSIWMLME]");
1907                 ret = -1;
1908         }
1909
1910         return ret;
1911 }
1912
1913
1914 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1915                                           int reason_code)
1916 {
1917         struct wpa_driver_wext_data *drv = priv;
1918         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1919         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1920 }
1921
1922
1923 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
1924                                         int reason_code)
1925 {
1926         struct wpa_driver_wext_data *drv = priv;
1927         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1928         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC,
1929                                     reason_code);
1930 }
1931
1932
1933 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
1934                                       size_t ie_len)
1935 {
1936         struct wpa_driver_wext_data *drv = priv;
1937         struct iwreq iwr;
1938         int ret = 0;
1939
1940         os_memset(&iwr, 0, sizeof(iwr));
1941         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1942         iwr.u.data.pointer = (caddr_t) ie;
1943         iwr.u.data.length = ie_len;
1944
1945         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1946                 perror("ioctl[SIOCSIWGENIE]");
1947                 ret = -1;
1948         }
1949
1950         return ret;
1951 }
1952
1953
1954 int wpa_driver_wext_cipher2wext(int cipher)
1955 {
1956         switch (cipher) {
1957         case CIPHER_NONE:
1958                 return IW_AUTH_CIPHER_NONE;
1959         case CIPHER_WEP40:
1960                 return IW_AUTH_CIPHER_WEP40;
1961         case CIPHER_TKIP:
1962                 return IW_AUTH_CIPHER_TKIP;
1963         case CIPHER_CCMP:
1964                 return IW_AUTH_CIPHER_CCMP;
1965         case CIPHER_WEP104:
1966                 return IW_AUTH_CIPHER_WEP104;
1967         default:
1968                 return 0;
1969         }
1970 }
1971
1972
1973 int wpa_driver_wext_keymgmt2wext(int keymgmt)
1974 {
1975         switch (keymgmt) {
1976         case KEY_MGMT_802_1X:
1977         case KEY_MGMT_802_1X_NO_WPA:
1978                 return IW_AUTH_KEY_MGMT_802_1X;
1979         case KEY_MGMT_PSK:
1980                 return IW_AUTH_KEY_MGMT_PSK;
1981         default:
1982                 return 0;
1983         }
1984 }
1985
1986
1987 static int
1988 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
1989                                   struct wpa_driver_associate_params *params)
1990 {
1991         struct iwreq iwr;
1992         int ret = 0;
1993
1994         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1995                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1996
1997         os_memset(&iwr, 0, sizeof(iwr));
1998         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1999         /* Just changing mode, not actual keys */
2000         iwr.u.encoding.flags = 0;
2001         iwr.u.encoding.pointer = (caddr_t) NULL;
2002         iwr.u.encoding.length = 0;
2003
2004         /*
2005          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2006          * different things. Here they are used to indicate Open System vs.
2007          * Shared Key authentication algorithm. However, some drivers may use
2008          * them to select between open/restricted WEP encrypted (open = allow
2009          * both unencrypted and encrypted frames; restricted = only allow
2010          * encrypted frames).
2011          */
2012
2013         if (!drv->use_crypt) {
2014                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2015         } else {
2016                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2017                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2018                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2019                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2020         }
2021
2022         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2023                 perror("ioctl[SIOCSIWENCODE]");
2024                 ret = -1;
2025         }
2026
2027         return ret;
2028 }
2029
2030
2031 int wpa_driver_wext_associate(void *priv,
2032                               struct wpa_driver_associate_params *params)
2033 {
2034         struct wpa_driver_wext_data *drv = priv;
2035         int ret = 0;
2036         int allow_unencrypted_eapol;
2037         int value;
2038
2039         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2040
2041         /*
2042          * If the driver did not support SIOCSIWAUTH, fallback to
2043          * SIOCSIWENCODE here.
2044          */
2045         if (drv->auth_alg_fallback &&
2046             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2047                 ret = -1;
2048
2049         if (!params->bssid &&
2050             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2051                 ret = -1;
2052
2053         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2054                 ret = -1;
2055         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2056          * from configuration, not from here, where only the selected suite is
2057          * available */
2058         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2059             < 0)
2060                 ret = -1;
2061         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2062                 value = IW_AUTH_WPA_VERSION_DISABLED;
2063         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2064                 value = IW_AUTH_WPA_VERSION_WPA2;
2065         else
2066                 value = IW_AUTH_WPA_VERSION_WPA;
2067         if (wpa_driver_wext_set_auth_param(drv,
2068                                            IW_AUTH_WPA_VERSION, value) < 0)
2069                 ret = -1;
2070         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2071         if (wpa_driver_wext_set_auth_param(drv,
2072                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2073                 ret = -1;
2074         value = wpa_driver_wext_cipher2wext(params->group_suite);
2075         if (wpa_driver_wext_set_auth_param(drv,
2076                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2077                 ret = -1;
2078         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2079         if (wpa_driver_wext_set_auth_param(drv,
2080                                            IW_AUTH_KEY_MGMT, value) < 0)
2081                 ret = -1;
2082         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2083                 params->pairwise_suite != CIPHER_NONE ||
2084                 params->group_suite != CIPHER_NONE ||
2085                 params->wpa_ie_len;
2086         if (wpa_driver_wext_set_auth_param(drv,
2087                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2088                 ret = -1;
2089
2090         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2091          * not using WPA. IEEE 802.1X specifies that these frames are not
2092          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2093         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2094             params->key_mgmt_suite == KEY_MGMT_PSK)
2095                 allow_unencrypted_eapol = 0;
2096         else
2097                 allow_unencrypted_eapol = 1;
2098
2099         if (wpa_driver_wext_set_auth_param(drv,
2100                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2101                                            allow_unencrypted_eapol) < 0)
2102                 ret = -1;
2103         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2104                 ret = -1;
2105         if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2106                 ret = -1;
2107         if (params->bssid &&
2108             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2109                 ret = -1;
2110
2111         return ret;
2112 }
2113
2114
2115 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2116 {
2117         struct wpa_driver_wext_data *drv = priv;
2118         int algs = 0, res;
2119
2120         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2121                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2122         if (auth_alg & AUTH_ALG_SHARED_KEY)
2123                 algs |= IW_AUTH_ALG_SHARED_KEY;
2124         if (auth_alg & AUTH_ALG_LEAP)
2125                 algs |= IW_AUTH_ALG_LEAP;
2126         if (algs == 0) {
2127                 /* at least one algorithm should be set */
2128                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2129         }
2130
2131         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2132                                              algs);
2133         drv->auth_alg_fallback = res == -2;
2134         return res;
2135 }
2136
2137
2138 /**
2139  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2140  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2141  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2142  * Returns: 0 on success, -1 on failure
2143  */
2144 int wpa_driver_wext_set_mode(void *priv, int mode)
2145 {
2146         struct wpa_driver_wext_data *drv = priv;
2147         struct iwreq iwr;
2148         int ret = 0;
2149
2150         os_memset(&iwr, 0, sizeof(iwr));
2151         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2152         iwr.u.mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2153
2154         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0) {
2155                 perror("ioctl[SIOCSIWMODE]");
2156                 ret = -1;
2157         }
2158
2159         return ret;
2160 }
2161
2162
2163 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2164                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2165 {
2166         struct iwreq iwr;
2167         struct iw_pmksa pmksa;
2168         int ret = 0;
2169
2170         os_memset(&iwr, 0, sizeof(iwr));
2171         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2172         os_memset(&pmksa, 0, sizeof(pmksa));
2173         pmksa.cmd = cmd;
2174         pmksa.bssid.sa_family = ARPHRD_ETHER;
2175         if (bssid)
2176                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2177         if (pmkid)
2178                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2179         iwr.u.data.pointer = (caddr_t) &pmksa;
2180         iwr.u.data.length = sizeof(pmksa);
2181
2182         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2183                 if (errno != EOPNOTSUPP)
2184                         perror("ioctl[SIOCSIWPMKSA]");
2185                 ret = -1;
2186         }
2187
2188         return ret;
2189 }
2190
2191
2192 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2193                                      const u8 *pmkid)
2194 {
2195         struct wpa_driver_wext_data *drv = priv;
2196         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2197 }
2198
2199
2200 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2201                                         const u8 *pmkid)
2202 {
2203         struct wpa_driver_wext_data *drv = priv;
2204         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2205 }
2206
2207
2208 static int wpa_driver_wext_flush_pmkid(void *priv)
2209 {
2210         struct wpa_driver_wext_data *drv = priv;
2211         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2212 }
2213
2214
2215 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2216 {
2217         struct wpa_driver_wext_data *drv = priv;
2218         if (!drv->has_capability)
2219                 return -1;
2220         os_memcpy(capa, &drv->capa, sizeof(*capa));
2221         return 0;
2222 }
2223
2224
2225 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2226                                         const char *ifname)
2227 {
2228         if (ifname == NULL) {
2229                 drv->ifindex2 = -1;
2230                 return 0;
2231         }
2232
2233         drv->ifindex2 = if_nametoindex(ifname);
2234         if (drv->ifindex2 <= 0)
2235                 return -1;
2236
2237         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2238                    "wireless events", drv->ifindex2, ifname);
2239
2240         return 0;
2241 }
2242
2243
2244 int wpa_driver_wext_set_operstate(void *priv, int state)
2245 {
2246         struct wpa_driver_wext_data *drv = priv;
2247
2248         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2249                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2250         drv->operstate = state;
2251         return wpa_driver_wext_send_oper_ifla(
2252                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2253 }
2254
2255
2256 #ifdef CONFIG_CLIENT_MLME
2257 static int hostapd_ioctl(struct wpa_driver_wext_data *drv,
2258                          struct prism2_hostapd_param *param, int len)
2259 {
2260         struct iwreq iwr;
2261
2262         os_memset(&iwr, 0, sizeof(iwr));
2263         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2264         iwr.u.data.pointer = (caddr_t) param;
2265         iwr.u.data.length = len;
2266
2267         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
2268                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2269                 return -1;
2270         }
2271
2272         return 0;
2273 }
2274
2275
2276 static struct wpa_hw_modes *
2277 wpa_driver_wext_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2278 {
2279         struct wpa_driver_wext_data *drv = priv;
2280         struct prism2_hostapd_param *param;
2281         u8 *pos, *end;
2282         struct wpa_hw_modes *modes = NULL;
2283         int i;
2284
2285         param = os_zalloc(PRISM2_HOSTAPD_MAX_BUF_SIZE);
2286         if (param == NULL)
2287                 return NULL;
2288         param->cmd = PRISM2_HOSTAPD_GET_HW_FEATURES;
2289
2290         if (hostapd_ioctl(drv, param, PRISM2_HOSTAPD_MAX_BUF_SIZE) < 0) {
2291                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2292                 goto out;
2293         }
2294
2295         *num_modes = param->u.hw_features.num_modes;
2296         *flags = param->u.hw_features.flags;
2297
2298         pos = param->u.hw_features.data;
2299         end = pos + PRISM2_HOSTAPD_MAX_BUF_SIZE -
2300                 (param->u.hw_features.data - (u8 *) param);
2301
2302         modes = os_zalloc(*num_modes * sizeof(struct wpa_hw_modes));
2303         if (modes == NULL)
2304                 goto out;
2305
2306         for (i = 0; i < *num_modes; i++) {
2307                 struct hostapd_ioctl_hw_modes_hdr *hdr;
2308                 struct wpa_hw_modes *feature;
2309                 int clen, rlen;
2310
2311                 hdr = (struct hostapd_ioctl_hw_modes_hdr *) pos;
2312                 pos = (u8 *) (hdr + 1);
2313                 clen = hdr->num_channels * sizeof(struct wpa_channel_data);
2314                 rlen = hdr->num_rates * sizeof(struct wpa_rate_data);
2315
2316                 feature = &modes[i];
2317                 switch (hdr->mode) {
2318                 case MODE_IEEE80211A:
2319                         feature->mode = WPA_MODE_IEEE80211A;
2320                         break;
2321                 case MODE_IEEE80211B:
2322                         feature->mode = WPA_MODE_IEEE80211B;
2323                         break;
2324                 case MODE_IEEE80211G:
2325                         feature->mode = WPA_MODE_IEEE80211G;
2326                         break;
2327                 case MODE_ATHEROS_TURBO:
2328                 case MODE_ATHEROS_TURBOG:
2329                         wpa_printf(MSG_ERROR, "Skip unsupported hw_mode=%d in "
2330                                    "get_hw_features data", hdr->mode);
2331                         pos += clen + rlen;
2332                         continue;
2333                 default:
2334                         wpa_printf(MSG_ERROR, "Unknown hw_mode=%d in "
2335                                    "get_hw_features data", hdr->mode);
2336                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2337                         modes = NULL;
2338                         break;
2339                 }
2340                 feature->num_channels = hdr->num_channels;
2341                 feature->num_rates = hdr->num_rates;
2342
2343                 feature->channels = os_malloc(clen);
2344                 feature->rates = os_malloc(rlen);
2345                 if (!feature->channels || !feature->rates ||
2346                     pos + clen + rlen > end) {
2347                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2348                         modes = NULL;
2349                         break;
2350                 }
2351
2352                 os_memcpy(feature->channels, pos, clen);
2353                 pos += clen;
2354                 os_memcpy(feature->rates, pos, rlen);
2355                 pos += rlen;
2356         }
2357
2358 out:
2359         os_free(param);
2360         return modes;
2361 }
2362
2363
2364 int wpa_driver_wext_set_channel(void *priv, wpa_hw_mode phymode, int chan,
2365                                 int freq)
2366 {
2367         return wpa_driver_wext_set_freq(priv, freq);
2368 }
2369
2370
2371 static void wpa_driver_wext_mlme_read(int sock, void *eloop_ctx,
2372                                       void *sock_ctx)
2373 {
2374         struct wpa_driver_wext_data *drv = eloop_ctx;
2375         int len;
2376         unsigned char buf[3000];
2377         struct ieee80211_frame_info *fi;
2378         struct ieee80211_rx_status rx_status;
2379
2380         len = recv(sock, buf, sizeof(buf), 0);
2381         if (len < 0) {
2382                 perror("recv[MLME]");
2383                 return;
2384         }
2385
2386         if (len < (int) sizeof(struct ieee80211_frame_info)) {
2387                 wpa_printf(MSG_DEBUG, "WEXT: Too short MLME frame (len=%d)",
2388                            len);
2389                 return;
2390         }
2391
2392         fi = (struct ieee80211_frame_info *) buf;
2393         if (ntohl(fi->version) != IEEE80211_FI_VERSION) {
2394                 wpa_printf(MSG_DEBUG, "WEXT: Invalid MLME frame info version "
2395                            "0x%x", ntohl(fi->version));
2396                 return;
2397         }
2398
2399         os_memset(&rx_status, 0, sizeof(rx_status));
2400         rx_status.ssi = ntohl(fi->ssi_signal);
2401         rx_status.channel = ntohl(fi->channel);
2402
2403         wpa_supplicant_sta_rx(drv->ctx,
2404                               buf + sizeof(struct ieee80211_frame_info),
2405                               len - sizeof(struct ieee80211_frame_info),
2406                               &rx_status);
2407 }
2408
2409
2410 static int wpa_driver_wext_open_mlme(struct wpa_driver_wext_data *drv)
2411 {
2412         int flags, ifindex, s;
2413         struct sockaddr_ll addr;
2414         struct ifreq ifr;
2415
2416         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_USER_SPACE_MLME, 1) <
2417             0) {
2418                 wpa_printf(MSG_ERROR, "WEXT: Failed to configure driver to "
2419                            "use user space MLME");
2420                 return -1;
2421         }
2422
2423         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_MGMT_IF, 1) < 0) {
2424                 wpa_printf(MSG_ERROR, "WEXT: Failed to add management "
2425                            "interface for user space MLME");
2426                 return -1;
2427         }
2428
2429         ifindex = wpa_driver_prism2_param_get(drv, PRISM2_PARAM_MGMT_IF);
2430         if (ifindex <= 0) {
2431                 wpa_printf(MSG_ERROR, "WEXT: MLME management device not "
2432                            "found");
2433                 return -1;
2434         }
2435
2436         os_memset(&ifr, 0, sizeof(ifr));
2437         ifr.ifr_ifindex = ifindex;
2438         if (ioctl(drv->ioctl_sock, SIOCGIFNAME, &ifr) != 0) {
2439                 perror("ioctl(SIOCGIFNAME)");
2440                 return -1;
2441         }
2442         os_strlcpy(drv->mlmedev, ifr.ifr_name, sizeof(drv->mlmedev));
2443         wpa_printf(MSG_DEBUG, "WEXT: MLME management device '%s'",
2444                    drv->mlmedev);
2445
2446         if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev, &flags) != 0
2447             || wpa_driver_wext_set_ifflags_ifname(drv, drv->mlmedev,
2448                                                   flags | IFF_UP) != 0) {
2449                 wpa_printf(MSG_ERROR, "WEXT: Could not set interface "
2450                            "'%s' UP", drv->mlmedev);
2451                 return -1;
2452         }
2453
2454         s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2455         if (s < 0) {
2456                 perror("socket[PF_PACKET,SOCK_RAW]");
2457                 return -1;
2458         }
2459
2460         os_memset(&addr, 0, sizeof(addr));
2461         addr.sll_family = AF_PACKET;
2462         addr.sll_ifindex = ifindex;
2463
2464         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
2465                 perror("bind(MLME)");
2466                 return -1;
2467         }
2468
2469         if (eloop_register_read_sock(s, wpa_driver_wext_mlme_read, drv, NULL))
2470         {
2471                 wpa_printf(MSG_ERROR, "WEXT: Could not register MLME read "
2472                            "socket");
2473                 close(s);
2474                 return -1;
2475         }
2476
2477         return s;
2478 }
2479
2480
2481 static int wpa_driver_wext_send_mlme(void *priv, const u8 *data,
2482                                      size_t data_len)
2483 {
2484         struct wpa_driver_wext_data *drv = priv;
2485         int ret;
2486
2487         ret = send(drv->mlme_sock, data, data_len, 0);
2488         if (ret < 0) {
2489                 perror("send[MLME]");
2490                 return -1;
2491         }
2492
2493         return 0;
2494 }
2495
2496
2497 static int wpa_driver_wext_mlme_add_sta(void *priv, const u8 *addr,
2498                                         const u8 *supp_rates,
2499                                         size_t supp_rates_len)
2500 {
2501         struct wpa_driver_wext_data *drv = priv;
2502         struct prism2_hostapd_param param;
2503         size_t len;
2504
2505         os_memset(&param, 0, sizeof(param));
2506         param.cmd = PRISM2_HOSTAPD_ADD_STA;
2507         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2508         len = supp_rates_len;
2509         if (len > sizeof(param.u.add_sta.supp_rates))
2510                 len = sizeof(param.u.add_sta.supp_rates);
2511         os_memcpy(param.u.add_sta.supp_rates, supp_rates, len);
2512         return hostapd_ioctl(drv, &param, sizeof(param));
2513 }
2514
2515
2516 static int wpa_driver_wext_mlme_remove_sta(void *priv, const u8 *addr)
2517 {
2518         struct wpa_driver_wext_data *drv = priv;
2519         struct prism2_hostapd_param param;
2520
2521         os_memset(&param, 0, sizeof(param));
2522         param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
2523         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2524         return hostapd_ioctl(drv, &param, sizeof(param));
2525 }
2526
2527 #endif /* CONFIG_CLIENT_MLME */
2528
2529
2530 static int wpa_driver_wext_set_param(void *priv, const char *param)
2531 {
2532 #ifdef CONFIG_CLIENT_MLME
2533         struct wpa_driver_wext_data *drv = priv;
2534
2535         if (param == NULL)
2536                 return 0;
2537
2538         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2539
2540         if (os_strstr(param, "use_mlme=1")) {
2541                 wpa_printf(MSG_DEBUG, "WEXT: Using user space MLME");
2542                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2543
2544                 drv->mlme_sock = wpa_driver_wext_open_mlme(drv);
2545                 if (drv->mlme_sock < 0)
2546                         return -1;
2547         }
2548 #endif /* CONFIG_CLIENT_MLME */
2549
2550         return 0;
2551 }
2552
2553
2554 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2555 {
2556         return drv->we_version_compiled;
2557 }
2558
2559
2560 const struct wpa_driver_ops wpa_driver_wext_ops = {
2561         .name = "wext",
2562         .desc = "Linux wireless extensions (generic)",
2563         .get_bssid = wpa_driver_wext_get_bssid,
2564         .get_ssid = wpa_driver_wext_get_ssid,
2565         .set_wpa = wpa_driver_wext_set_wpa,
2566         .set_key = wpa_driver_wext_set_key,
2567         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2568         .set_drop_unencrypted = wpa_driver_wext_set_drop_unencrypted,
2569         .scan = wpa_driver_wext_scan,
2570         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2571         .deauthenticate = wpa_driver_wext_deauthenticate,
2572         .disassociate = wpa_driver_wext_disassociate,
2573         .associate = wpa_driver_wext_associate,
2574         .set_auth_alg = wpa_driver_wext_set_auth_alg,
2575         .init = wpa_driver_wext_init,
2576         .deinit = wpa_driver_wext_deinit,
2577         .set_param = wpa_driver_wext_set_param,
2578         .add_pmkid = wpa_driver_wext_add_pmkid,
2579         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2580         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2581         .get_capa = wpa_driver_wext_get_capa,
2582         .set_operstate = wpa_driver_wext_set_operstate,
2583 #ifdef CONFIG_CLIENT_MLME
2584         .get_hw_feature_data = wpa_driver_wext_get_hw_feature_data,
2585         .set_channel = wpa_driver_wext_set_channel,
2586         .set_ssid = wpa_driver_wext_set_ssid,
2587         .set_bssid = wpa_driver_wext_set_bssid,
2588         .send_mlme = wpa_driver_wext_send_mlme,
2589         .mlme_add_sta = wpa_driver_wext_mlme_add_sta,
2590         .mlme_remove_sta = wpa_driver_wext_mlme_remove_sta,
2591 #endif /* CONFIG_CLIENT_MLME */
2592 };