src/drivers/driver_wext.c

   1 /*
   2  * WPA Supplicant - driver interaction with generic Linux Wireless Extensions
   3  * Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements a driver interface for the Linux Wireless Extensions.
  15  * When used with WE-18 or newer, this interface can be used as-is with number
  16  * of drivers. In addition to this, some of the common functions in this file
  17  * can be used by other driver interface implementations that use generic WE
  18  * ioctls, but require private ioctls for some of the functionality.
  19  */
  20
  21 #include "includes.h"
  22 #include <sys/ioctl.h>
  23 #include <net/if_arp.h>
  24
  25 #include "wireless_copy.h"
  26 #include "common.h"
  27 #include "driver.h"
  28 #include "eloop.h"
  29 #include "priv_netlink.h"
  30 #include "driver_wext.h"
  31 #include "ieee802_11_defs.h"
  32 #include "wpa_common.h"
  33
  34 #ifdef CONFIG_CLIENT_MLME
  35 #include <netpacket/packet.h>
  36 /* old definitions from net/mac80211 */
  37
  38 typedef u32 __bitwise __be32;
  39 typedef u64 __bitwise __be64;
  40
  41 #define PRISM2_IOCTL_PRISM2_PARAM (SIOCIWFIRSTPRIV + 0)
  42 #define PRISM2_IOCTL_GET_PRISM2_PARAM (SIOCIWFIRSTPRIV + 1)
  43 #define PRISM2_IOCTL_HOSTAPD (SIOCIWFIRSTPRIV + 3)
  44
  45 #define PRISM2_PARAM_USER_SPACE_MLME 1045
  46 #define PRISM2_PARAM_MGMT_IF            1046
  47 #define PRISM2_HOSTAPD_ADD_STA 2
  48 #define PRISM2_HOSTAPD_REMOVE_STA 3
  49 #define PRISM2_HOSTAPD_GET_HW_FEATURES  1002
  50 #define PRISM2_HOSTAPD_MAX_BUF_SIZE     2048
  51
  52 #ifndef ALIGNED
  53 #define ALIGNED __attribute__ ((aligned))
  54 #endif
  55
  56 struct prism2_hostapd_param {
  57         u32 cmd;
  58         u8 sta_addr[ETH_ALEN];
  59         u8 pad[2];
  60         union {
  61                 struct {
  62                         u16 aid;
  63                         u16 capability;
  64                         u8 supp_rates[32];
  65                         u8 wds_flags;
  66 #define IEEE80211_STA_DYNAMIC_ENC BIT(0)
  67                         u8 enc_flags;
  68                         u16 listen_interval;
  69                 } add_sta;
  70                 struct {
  71                         u16 num_modes;
  72                         u16 flags;
  73                         u8 data[0] ALIGNED; /* num_modes * feature data */
  74                 } hw_features;
  75                 struct {
  76                         u16 mode; /* MODE_* */
  77                         u16 num_supported_rates;
  78                         u16 num_basic_rates;
  79                         u8 data[0] ALIGNED; /* num_supported_rates * u16 +
  80                                              * num_basic_rates * u16 */
  81                 } set_rate_sets;
  82                 struct {
  83                         u16 mode; /* MODE_* */
  84                         u16 chan;
  85                         u32 flag;
  86                         u8 power_level; /* regulatory limit in dBm */
  87                         u8 antenna_max;
  88                 } set_channel_flag;
  89                 struct {
  90                         u32 rd;
  91                 } set_regulatory_domain;
  92                 struct {
  93                         u32 queue;
  94                         s32 aifs;
  95                         u32 cw_min;
  96                         u32 cw_max;
  97                         u32 burst_time; /* maximum burst time in 0.1 ms, i.e.,
  98                                          * 10 = 1 ms */
  99                 } tx_queue_params;
 100         } u;
 101 };
 102
 103 struct hostapd_ioctl_hw_modes_hdr {
 104         int mode;
 105         int num_channels;
 106         int num_rates;
 107 };
 108
 109 /*
 110  * frame format for the management interface that is slated
 111  * to be replaced by "cooked monitor" with radiotap
 112  */
 113 #define IEEE80211_FI_VERSION 0x80211001
 114 struct ieee80211_frame_info {
 115         __be32 version;
 116         __be32 length;
 117         __be64 mactime;
 118         __be64 hosttime;
 119         __be32 phytype;
 120         __be32 channel;
 121         __be32 datarate;
 122         __be32 antenna;
 123         __be32 priority;
 124         __be32 ssi_type;
 125         __be32 ssi_signal;
 126         __be32 ssi_noise;
 127         __be32 preamble;
 128         __be32 encoding;
 129
 130         /* Note: this structure is otherwise identical to capture format used
 131          * in linux-wlan-ng, but this additional field is used to provide meta
 132          * data about the frame to hostapd. This was the easiest method for
 133          * providing this information, but this might change in the future. */
 134         __be32 msg_type;
 135 } __attribute__ ((packed));
 136
 137 /* old mode definitions */
 138 enum {
 139         MODE_IEEE80211A = 0 /* IEEE 802.11a */,
 140         MODE_IEEE80211B = 1 /* IEEE 802.11b only */,
 141         MODE_ATHEROS_TURBO = 2 /* Atheros Turbo mode (2x.11a at 5 GHz) */,
 142         MODE_IEEE80211G = 3 /* IEEE 802.11g (and 802.11b compatibility) */,
 143         MODE_ATHEROS_TURBOG = 4 /* Atheros Turbo mode (2x.11g at 2.4 GHz) */,
 144         NUM_IEEE80211_MODES = 5
 145 };
 146
 147 #ifndef ETH_P_ALL
 148 #define ETH_P_ALL 0x0003
 149 #endif
 150 #endif /* CONFIG_CLIENT_MLME */
 151
 152
 153
 154
 155 static int wpa_driver_wext_flush_pmkid(void *priv);
 156 static int wpa_driver_wext_get_range(void *priv);
 157 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
 158
 159
 160 static int wpa_driver_wext_send_oper_ifla(struct wpa_driver_wext_data *drv,
 161                                           int linkmode, int operstate)
 162 {
 163         struct {
 164                 struct nlmsghdr hdr;
 165                 struct ifinfomsg ifinfo;
 166                 char opts[16];
 167         } req;
 168         struct rtattr *rta;
 169         static int nl_seq;
 170         ssize_t ret;
 171
 172         os_memset(&req, 0, sizeof(req));
 173
 174         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 175         req.hdr.nlmsg_type = RTM_SETLINK;
 176         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 177         req.hdr.nlmsg_seq = ++nl_seq;
 178         req.hdr.nlmsg_pid = 0;
 179
 180         req.ifinfo.ifi_family = AF_UNSPEC;
 181         req.ifinfo.ifi_type = 0;
 182         req.ifinfo.ifi_index = drv->ifindex;
 183         req.ifinfo.ifi_flags = 0;
 184         req.ifinfo.ifi_change = 0;
 185
 186         if (linkmode != -1) {
 187                 rta = (struct rtattr *)
 188                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 189                 rta->rta_type = IFLA_LINKMODE;
 190                 rta->rta_len = RTA_LENGTH(sizeof(char));
 191                 *((char *) RTA_DATA(rta)) = linkmode;
 192                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 193                         RTA_LENGTH(sizeof(char));
 194         }
 195         if (operstate != -1) {
 196                 rta = (struct rtattr *)
 197                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 198                 rta->rta_type = IFLA_OPERSTATE;
 199                 rta->rta_len = RTA_LENGTH(sizeof(char));
 200                 *((char *) RTA_DATA(rta)) = operstate;
 201                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 202                         RTA_LENGTH(sizeof(char));
 203         }
 204
 205         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 206                    linkmode, operstate);
 207
 208         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 209         if (ret < 0) {
 210                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 211                            "%s (assume operstate is not supported)",
 212                            strerror(errno));
 213         }
 214
 215         return ret < 0 ? -1 : 0;
 216 }
 217
 218
 219 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
 220                                    int idx, u32 value)
 221 {
 222         struct iwreq iwr;
 223         int ret = 0;
 224
 225         os_memset(&iwr, 0, sizeof(iwr));
 226         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 227         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 228         iwr.u.param.value = value;
 229
 230         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 231                 if (errno != EOPNOTSUPP) {
 232                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 233                                    "value 0x%x) failed: %s)",
 234                                    idx, value, strerror(errno));
 235                 }
 236                 ret = errno == EOPNOTSUPP ? -2 : -1;
 237         }
 238
 239         return ret;
 240 }
 241
 242
 243 /**
 244  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
 245  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 246  * @bssid: Buffer for BSSID
 247  * Returns: 0 on success, -1 on failure
 248  */
 249 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
 250 {
 251         struct wpa_driver_wext_data *drv = priv;
 252         struct iwreq iwr;
 253         int ret = 0;
 254
 255         os_memset(&iwr, 0, sizeof(iwr));
 256         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 257
 258         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 259                 perror("ioctl[SIOCGIWAP]");
 260                 ret = -1;
 261         }
 262         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 263
 264         return ret;
 265 }
 266
 267
 268 /**
 269  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
 270  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 271  * @bssid: BSSID
 272  * Returns: 0 on success, -1 on failure
 273  */
 274 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
 275 {
 276         struct wpa_driver_wext_data *drv = priv;
 277         struct iwreq iwr;
 278         int ret = 0;
 279
 280         os_memset(&iwr, 0, sizeof(iwr));
 281         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 282         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 283         if (bssid)
 284                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 285         else
 286                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 287
 288         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 289                 perror("ioctl[SIOCSIWAP]");
 290                 ret = -1;
 291         }
 292
 293         return ret;
 294 }
 295
 296
 297 /**
 298  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 299  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 300  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 301  * Returns: SSID length on success, -1 on failure
 302  */
 303 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 304 {
 305         struct wpa_driver_wext_data *drv = priv;
 306         struct iwreq iwr;
 307         int ret = 0;
 308
 309         os_memset(&iwr, 0, sizeof(iwr));
 310         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 311         iwr.u.essid.pointer = (caddr_t) ssid;
 312         iwr.u.essid.length = 32;
 313
 314         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 315                 perror("ioctl[SIOCGIWESSID]");
 316                 ret = -1;
 317         } else {
 318                 ret = iwr.u.essid.length;
 319                 if (ret > 32)
 320                         ret = 32;
 321                 /* Some drivers include nul termination in the SSID, so let's
 322                  * remove it here before further processing. WE-21 changes this
 323                  * to explicitly require the length _not_ to include nul
 324                  * termination. */
 325                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 326                     drv->we_version_compiled < 21)
 327                         ret--;
 328         }
 329
 330         return ret;
 331 }
 332
 333
 334 /**
 335  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 336  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 337  * @ssid: SSID
 338  * @ssid_len: Length of SSID (0..32)
 339  * Returns: 0 on success, -1 on failure
 340  */
 341 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 342 {
 343         struct wpa_driver_wext_data *drv = priv;
 344         struct iwreq iwr;
 345         int ret = 0;
 346         char buf[33];
 347
 348         if (ssid_len > 32)
 349                 return -1;
 350
 351         os_memset(&iwr, 0, sizeof(iwr));
 352         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 353         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 354         iwr.u.essid.flags = (ssid_len != 0);
 355         os_memset(buf, 0, sizeof(buf));
 356         os_memcpy(buf, ssid, ssid_len);
 357         iwr.u.essid.pointer = (caddr_t) buf;
 358         if (drv->we_version_compiled < 21) {
 359                 /* For historic reasons, set SSID length to include one extra
 360                  * character, C string nul termination, even though SSID is
 361                  * really an octet string that should not be presented as a C
 362                  * string. Some Linux drivers decrement the length by one and
 363                  * can thus end up missing the last octet of the SSID if the
 364                  * length is not incremented here. WE-21 changes this to
 365                  * explicitly require the length _not_ to include nul
 366                  * termination. */
 367                 if (ssid_len)
 368                         ssid_len++;
 369         }
 370         iwr.u.essid.length = ssid_len;
 371
 372         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 373                 perror("ioctl[SIOCSIWESSID]");
 374                 ret = -1;
 375         }
 376
 377         return ret;
 378 }
 379
 380
 381 /**
 382  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 383  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 384  * @freq: Frequency in MHz
 385  * Returns: 0 on success, -1 on failure
 386  */
 387 int wpa_driver_wext_set_freq(void *priv, int freq)
 388 {
 389         struct wpa_driver_wext_data *drv = priv;
 390         struct iwreq iwr;
 391         int ret = 0;
 392
 393         os_memset(&iwr, 0, sizeof(iwr));
 394         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 395         iwr.u.freq.m = freq * 100000;
 396         iwr.u.freq.e = 1;
 397
 398         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 399                 perror("ioctl[SIOCSIWFREQ]");
 400                 ret = -1;
 401         }
 402
 403         return ret;
 404 }
 405
 406
 407 static void
 408 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 409 {
 410         union wpa_event_data data;
 411
 412         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 413                    custom);
 414
 415         os_memset(&data, 0, sizeof(data));
 416         /* Host AP driver */
 417         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 418                 data.michael_mic_failure.unicast =
 419                         os_strstr(custom, " unicast ") != NULL;
 420                 /* TODO: parse parameters(?) */
 421                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 422         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 423                 char *spos;
 424                 int bytes;
 425
 426                 spos = custom + 17;
 427
 428                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 429                 if (!bytes || (bytes & 1))
 430                         return;
 431                 bytes /= 2;
 432
 433                 data.assoc_info.req_ies = os_malloc(bytes);
 434                 if (data.assoc_info.req_ies == NULL)
 435                         return;
 436
 437                 data.assoc_info.req_ies_len = bytes;
 438                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 439
 440                 spos += bytes * 2;
 441
 442                 data.assoc_info.resp_ies = NULL;
 443                 data.assoc_info.resp_ies_len = 0;
 444
 445                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 446                         spos += 9;
 447
 448                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 449                         if (!bytes || (bytes & 1))
 450                                 goto done;
 451                         bytes /= 2;
 452
 453                         data.assoc_info.resp_ies = os_malloc(bytes);
 454                         if (data.assoc_info.resp_ies == NULL)
 455                                 goto done;
 456
 457                         data.assoc_info.resp_ies_len = bytes;
 458                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 459                 }
 460
 461                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 462
 463         done:
 464                 os_free(data.assoc_info.resp_ies);
 465                 os_free(data.assoc_info.req_ies);
 466 #ifdef CONFIG_PEERKEY
 467         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 468                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 469                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 470                                    "STKSTART.request '%s'", custom + 17);
 471                         return;
 472                 }
 473                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 474 #endif /* CONFIG_PEERKEY */
 475         }
 476 }
 477
 478
 479 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 480         void *ctx, const char *ev, size_t len)
 481 {
 482         const struct iw_michaelmicfailure *mic;
 483         union wpa_event_data data;
 484
 485         if (len < sizeof(*mic))
 486                 return -1;
 487
 488         mic = (const struct iw_michaelmicfailure *) ev;
 489
 490         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 491                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 492                    MAC2STR(mic->src_addr.sa_data));
 493
 494         os_memset(&data, 0, sizeof(data));
 495         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 496         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 497
 498         return 0;
 499 }
 500
 501
 502 static int wpa_driver_wext_event_wireless_pmkidcand(
 503         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 504 {
 505         const struct iw_pmkid_cand *cand;
 506         union wpa_event_data data;
 507         const u8 *addr;
 508
 509         if (len < sizeof(*cand))
 510                 return -1;
 511
 512         cand = (const struct iw_pmkid_cand *) ev;
 513         addr = (const u8 *) cand->bssid.sa_data;
 514
 515         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 516                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 517                    cand->index, MAC2STR(addr));
 518
 519         os_memset(&data, 0, sizeof(data));
 520         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 521         data.pmkid_candidate.index = cand->index;
 522         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 523         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 524
 525         return 0;
 526 }
 527
 528
 529 static int wpa_driver_wext_event_wireless_assocreqie(
 530         struct wpa_driver_wext_data *drv, const char *ev, int len)
 531 {
 532         if (len < 0)
 533                 return -1;
 534
 535         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 536                     len);
 537         os_free(drv->assoc_req_ies);
 538         drv->assoc_req_ies = os_malloc(len);
 539         if (drv->assoc_req_ies == NULL) {
 540                 drv->assoc_req_ies_len = 0;
 541                 return -1;
 542         }
 543         os_memcpy(drv->assoc_req_ies, ev, len);
 544         drv->assoc_req_ies_len = len;
 545
 546         return 0;
 547 }
 548
 549
 550 static int wpa_driver_wext_event_wireless_assocrespie(
 551         struct wpa_driver_wext_data *drv, const char *ev, int len)
 552 {
 553         if (len < 0)
 554                 return -1;
 555
 556         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 557                     len);
 558         os_free(drv->assoc_resp_ies);
 559         drv->assoc_resp_ies = os_malloc(len);
 560         if (drv->assoc_resp_ies == NULL) {
 561                 drv->assoc_resp_ies_len = 0;
 562                 return -1;
 563         }
 564         os_memcpy(drv->assoc_resp_ies, ev, len);
 565         drv->assoc_resp_ies_len = len;
 566
 567         return 0;
 568 }
 569
 570
 571 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 572 {
 573         union wpa_event_data data;
 574
 575         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 576                 return;
 577
 578         os_memset(&data, 0, sizeof(data));
 579         if (drv->assoc_req_ies) {
 580                 data.assoc_info.req_ies = drv->assoc_req_ies;
 581                 drv->assoc_req_ies = NULL;
 582                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 583         }
 584         if (drv->assoc_resp_ies) {
 585                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 586                 drv->assoc_resp_ies = NULL;
 587                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 588         }
 589
 590         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 591
 592         os_free(data.assoc_info.req_ies);
 593         os_free(data.assoc_info.resp_ies);
 594 }
 595
 596
 597 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 598                                            void *ctx, char *data, int len)
 599 {
 600         struct iw_event iwe_buf, *iwe = &iwe_buf;
 601         char *pos, *end, *custom, *buf;
 602
 603         pos = data;
 604         end = data + len;
 605
 606         while (pos + IW_EV_LCP_LEN <= end) {
 607                 /* Event data may be unaligned, so make a local, aligned copy
 608                  * before processing. */
 609                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 610                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 611                            iwe->cmd, iwe->len);
 612                 if (iwe->len <= IW_EV_LCP_LEN)
 613                         return;
 614
 615                 custom = pos + IW_EV_POINT_LEN;
 616                 if (drv->we_version_compiled > 18 &&
 617                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 618                      iwe->cmd == IWEVCUSTOM ||
 619                      iwe->cmd == IWEVASSOCREQIE ||
 620                      iwe->cmd == IWEVASSOCRESPIE ||
 621                      iwe->cmd == IWEVPMKIDCAND)) {
 622                         /* WE-19 removed the pointer from struct iw_point */
 623                         char *dpos = (char *) &iwe_buf.u.data.length;
 624                         int dlen = dpos - (char *) &iwe_buf;
 625                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 626                                   sizeof(struct iw_event) - dlen);
 627                 } else {
 628                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 629                         custom += IW_EV_POINT_OFF;
 630                 }
 631
 632                 switch (iwe->cmd) {
 633                 case SIOCGIWAP:
 634                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 635                                    MACSTR,
 636                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 637                         if (is_zero_ether_addr(
 638                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 639                             os_memcmp(iwe->u.ap_addr.sa_data,
 640                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 641                             0) {
 642                                 os_free(drv->assoc_req_ies);
 643                                 drv->assoc_req_ies = NULL;
 644                                 os_free(drv->assoc_resp_ies);
 645                                 drv->assoc_resp_ies = NULL;
 646                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 647                                                      NULL);
 648
 649                         } else {
 650                                 wpa_driver_wext_event_assoc_ies(drv);
 651                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 652                         }
 653                         break;
 654                 case IWEVMICHAELMICFAILURE:
 655                         if (custom + iwe->u.data.length > end) {
 656                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 657                                            "IWEVMICHAELMICFAILURE length");
 658                                 return;
 659                         }
 660                         wpa_driver_wext_event_wireless_michaelmicfailure(
 661                                 ctx, custom, iwe->u.data.length);
 662                         break;
 663                 case IWEVCUSTOM:
 664                         if (custom + iwe->u.data.length > end) {
 665                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 666                                            "IWEVCUSTOM length");
 667                                 return;
 668                         }
 669                         buf = os_malloc(iwe->u.data.length + 1);
 670                         if (buf == NULL)
 671                                 return;
 672                         os_memcpy(buf, custom, iwe->u.data.length);
 673                         buf[iwe->u.data.length] = '\0';
 674                         wpa_driver_wext_event_wireless_custom(ctx, buf);
 675                         os_free(buf);
 676                         break;
 677                 case SIOCGIWSCAN:
 678                         drv->scan_complete_events = 1;
 679                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 680                                              drv, ctx);
 681                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 682                         break;
 683                 case IWEVASSOCREQIE:
 684                         if (custom + iwe->u.data.length > end) {
 685                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 686                                            "IWEVASSOCREQIE length");
 687                                 return;
 688                         }
 689                         wpa_driver_wext_event_wireless_assocreqie(
 690                                 drv, custom, iwe->u.data.length);
 691                         break;
 692                 case IWEVASSOCRESPIE:
 693                         if (custom + iwe->u.data.length > end) {
 694                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 695                                            "IWEVASSOCRESPIE length");
 696                                 return;
 697                         }
 698                         wpa_driver_wext_event_wireless_assocrespie(
 699                                 drv, custom, iwe->u.data.length);
 700                         break;
 701                 case IWEVPMKIDCAND:
 702                         if (custom + iwe->u.data.length > end) {
 703                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 704                                            "IWEVPMKIDCAND length");
 705                                 return;
 706                         }
 707                         wpa_driver_wext_event_wireless_pmkidcand(
 708                                 drv, custom, iwe->u.data.length);
 709                         break;
 710                 }
 711
 712                 pos += iwe->len;
 713         }
 714 }
 715
 716
 717 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 718                                        void *ctx, char *buf, size_t len,
 719                                        int del)
 720 {
 721         union wpa_event_data event;
 722
 723         os_memset(&event, 0, sizeof(event));
 724         if (len > sizeof(event.interface_status.ifname))
 725                 len = sizeof(event.interface_status.ifname) - 1;
 726         os_memcpy(event.interface_status.ifname, buf, len);
 727         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 728                 EVENT_INTERFACE_ADDED;
 729
 730         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 731                    del ? "DEL" : "NEW",
 732                    event.interface_status.ifname,
 733                    del ? "removed" : "added");
 734
 735         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 736                 if (del)
 737                         drv->if_removed = 1;
 738                 else
 739                         drv->if_removed = 0;
 740         }
 741
 742         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 743 }
 744
 745
 746 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 747                                       struct nlmsghdr *h)
 748 {
 749         struct ifinfomsg *ifi;
 750         int attrlen, nlmsg_len, rta_len;
 751         struct rtattr *attr;
 752
 753         ifi = NLMSG_DATA(h);
 754
 755         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 756
 757         attrlen = h->nlmsg_len - nlmsg_len;
 758         if (attrlen < 0)
 759                 return 0;
 760
 761         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 762
 763         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 764         while (RTA_OK(attr, attrlen)) {
 765                 if (attr->rta_type == IFLA_IFNAME) {
 766                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 767                             == 0)
 768                                 return 1;
 769                         else
 770                                 break;
 771                 }
 772                 attr = RTA_NEXT(attr, attrlen);
 773         }
 774
 775         return 0;
 776 }
 777
 778
 779 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 780                                        int ifindex, struct nlmsghdr *h)
 781 {
 782         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 783                 return 1;
 784
 785         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, h)) {
 786                 drv->ifindex = if_nametoindex(drv->ifname);
 787                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 788                            "interface");
 789                 wpa_driver_wext_finish_drv_init(drv);
 790                 return 1;
 791         }
 792
 793         return 0;
 794 }
 795
 796
 797 static void wpa_driver_wext_event_rtm_newlink(struct wpa_driver_wext_data *drv,
 798                                               void *ctx, struct nlmsghdr *h,
 799                                               size_t len)
 800 {
 801         struct ifinfomsg *ifi;
 802         int attrlen, nlmsg_len, rta_len;
 803         struct rtattr * attr;
 804
 805         if (len < sizeof(*ifi))
 806                 return;
 807
 808         ifi = NLMSG_DATA(h);
 809
 810         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, h)) {
 811                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 812                            ifi->ifi_index);
 813                 return;
 814         }
 815
 816         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 817                    "(%s%s%s%s)",
 818                    drv->operstate, ifi->ifi_flags,
 819                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 820                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 821                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 822                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 823         /*
 824          * Some drivers send the association event before the operup event--in
 825          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 826          * fails. This will hit us when wpa_supplicant does not need to do
 827          * IEEE 802.1X authentication
 828          */
 829         if (drv->operstate == 1 &&
 830             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 831             !(ifi->ifi_flags & IFF_RUNNING))
 832                 wpa_driver_wext_send_oper_ifla(drv, -1, IF_OPER_UP);
 833
 834         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 835
 836         attrlen = h->nlmsg_len - nlmsg_len;
 837         if (attrlen < 0)
 838                 return;
 839
 840         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 841
 842         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 843         while (RTA_OK(attr, attrlen)) {
 844                 if (attr->rta_type == IFLA_WIRELESS) {
 845                         wpa_driver_wext_event_wireless(
 846                                 drv, ctx, ((char *) attr) + rta_len,
 847                                 attr->rta_len - rta_len);
 848                 } else if (attr->rta_type == IFLA_IFNAME) {
 849                         wpa_driver_wext_event_link(drv, ctx,
 850                                                    ((char *) attr) + rta_len,
 851                                                    attr->rta_len - rta_len, 0);
 852                 }
 853                 attr = RTA_NEXT(attr, attrlen);
 854         }
 855 }
 856
 857
 858 static void wpa_driver_wext_event_rtm_dellink(struct wpa_driver_wext_data *drv,
 859                                               void *ctx, struct nlmsghdr *h,
 860                                               size_t len)
 861 {
 862         struct ifinfomsg *ifi;
 863         int attrlen, nlmsg_len, rta_len;
 864         struct rtattr * attr;
 865
 866         if (len < sizeof(*ifi))
 867                 return;
 868
 869         ifi = NLMSG_DATA(h);
 870
 871         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 872
 873         attrlen = h->nlmsg_len - nlmsg_len;
 874         if (attrlen < 0)
 875                 return;
 876
 877         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 878
 879         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 880         while (RTA_OK(attr, attrlen)) {
 881                 if (attr->rta_type == IFLA_IFNAME) {
 882                         wpa_driver_wext_event_link(drv,  ctx,
 883                                                    ((char *) attr) + rta_len,
 884                                                    attr->rta_len - rta_len, 1);
 885                 }
 886                 attr = RTA_NEXT(attr, attrlen);
 887         }
 888 }
 889
 890
 891 static void wpa_driver_wext_event_receive(int sock, void *eloop_ctx,
 892                                           void *sock_ctx)
 893 {
 894         char buf[8192];
 895         int left;
 896         struct sockaddr_nl from;
 897         socklen_t fromlen;
 898         struct nlmsghdr *h;
 899         int max_events = 10;
 900
 901 try_again:
 902         fromlen = sizeof(from);
 903         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 904                         (struct sockaddr *) &from, &fromlen);
 905         if (left < 0) {
 906                 if (errno != EINTR && errno != EAGAIN)
 907                         perror("recvfrom(netlink)");
 908                 return;
 909         }
 910
 911         h = (struct nlmsghdr *) buf;
 912         while (left >= (int) sizeof(*h)) {
 913                 int len, plen;
 914
 915                 len = h->nlmsg_len;
 916                 plen = len - sizeof(*h);
 917                 if (len > left || plen < 0) {
 918                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 919                                    "len=%d left=%d plen=%d",
 920                                    len, left, plen);
 921                         break;
 922                 }
 923
 924                 switch (h->nlmsg_type) {
 925                 case RTM_NEWLINK:
 926                         wpa_driver_wext_event_rtm_newlink(eloop_ctx, sock_ctx,
 927                                                           h, plen);
 928                         break;
 929                 case RTM_DELLINK:
 930                         wpa_driver_wext_event_rtm_dellink(eloop_ctx, sock_ctx,
 931                                                           h, plen);
 932                         break;
 933                 }
 934
 935                 len = NLMSG_ALIGN(len);
 936                 left -= len;
 937                 h = (struct nlmsghdr *) ((char *) h + len);
 938         }
 939
 940         if (left > 0) {
 941                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 942                            "message", left);
 943         }
 944
 945         if (--max_events > 0) {
 946                 /*
 947                  * Try to receive all events in one eloop call in order to
 948                  * limit race condition on cases where AssocInfo event, Assoc
 949                  * event, and EAPOL frames are received more or less at the
 950                  * same time. We want to process the event messages first
 951                  * before starting EAPOL processing.
 952                  */
 953                 goto try_again;
 954         }
 955 }
 956
 957
 958 static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
 959                                               const char *ifname, int *flags)
 960 {
 961         struct ifreq ifr;
 962
 963         os_memset(&ifr, 0, sizeof(ifr));
 964         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 965         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 966                 perror("ioctl[SIOCGIFFLAGS]");
 967                 return -1;
 968         }
 969         *flags = ifr.ifr_flags & 0xffff;
 970         return 0;
 971 }
 972
 973
 974 /**
 975  * wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 976  * @drv: driver_wext private data
 977  * @flags: Pointer to returned flags value
 978  * Returns: 0 on success, -1 on failure
 979  */
 980 int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
 981 {
 982         return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
 983 }
 984
 985
 986 static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
 987                                               const char *ifname, int flags)
 988 {
 989         struct ifreq ifr;
 990
 991         os_memset(&ifr, 0, sizeof(ifr));
 992         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 993         ifr.ifr_flags = flags & 0xffff;
 994         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 995                 perror("SIOCSIFFLAGS");
 996                 return -1;
 997         }
 998         return 0;
 999 }
1000
1001
1002 #ifdef CONFIG_CLIENT_MLME
1003
1004 static int wpa_driver_prism2_param_set(struct wpa_driver_wext_data *drv,
1005                                        int param, int value)
1006 {
1007         struct iwreq iwr;
1008         int *i;
1009
1010         os_memset(&iwr, 0, sizeof(iwr));
1011         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1012         i = (int *) iwr.u.name;
1013         *i++ = param;
1014         *i++ = value;
1015
1016         return ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr);
1017 }
1018
1019
1020 static int wpa_driver_prism2_param_get(struct wpa_driver_wext_data *drv,
1021                                        int param)
1022 {
1023         struct iwreq iwr;
1024         int *i;
1025
1026         os_memset(&iwr, 0, sizeof(iwr));
1027         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1028         i = (int *) iwr.u.name;
1029         *i = param;
1030
1031         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_GET_PRISM2_PARAM, &iwr) < 0) {
1032                 perror("ioctl[PRISM2_IOCTL_GET_PRISM2_PARAM]");
1033                 return -1;
1034         }
1035
1036         return *i;
1037 }
1038
1039 #endif /* CONFIG_CLIENT_MLME */
1040
1041
1042 /**
1043  * wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
1044  * @drv: driver_wext private data
1045  * @flags: New value for flags
1046  * Returns: 0 on success, -1 on failure
1047  */
1048 int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
1049 {
1050         return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
1051 }
1052
1053
1054 /**
1055  * wpa_driver_wext_init - Initialize WE driver interface
1056  * @ctx: context to be used when calling wpa_supplicant functions,
1057  * e.g., wpa_supplicant_event()
1058  * @ifname: interface name, e.g., wlan0
1059  * Returns: Pointer to private data, %NULL on failure
1060  */
1061 void * wpa_driver_wext_init(void *ctx, const char *ifname)
1062 {
1063         int s;
1064         struct sockaddr_nl local;
1065         struct wpa_driver_wext_data *drv;
1066
1067         drv = os_zalloc(sizeof(*drv));
1068         if (drv == NULL)
1069                 return NULL;
1070         drv->ctx = ctx;
1071         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1072
1073         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1074         if (drv->ioctl_sock < 0) {
1075                 perror("socket(PF_INET,SOCK_DGRAM)");
1076                 os_free(drv);
1077                 return NULL;
1078         }
1079
1080         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1081         if (s < 0) {
1082                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1083                 close(drv->ioctl_sock);
1084                 os_free(drv);
1085                 return NULL;
1086         }
1087
1088         os_memset(&local, 0, sizeof(local));
1089         local.nl_family = AF_NETLINK;
1090         local.nl_groups = RTMGRP_LINK;
1091         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1092                 perror("bind(netlink)");
1093                 close(s);
1094                 close(drv->ioctl_sock);
1095                 os_free(drv);
1096                 return NULL;
1097         }
1098
1099         eloop_register_read_sock(s, wpa_driver_wext_event_receive, drv, ctx);
1100         drv->event_sock = s;
1101
1102         drv->mlme_sock = -1;
1103
1104         wpa_driver_wext_finish_drv_init(drv);
1105
1106         return drv;
1107 }
1108
1109
1110 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
1111 {
1112         int flags;
1113
1114         if (wpa_driver_wext_get_ifflags(drv, &flags) != 0)
1115                 printf("Could not get interface '%s' flags\n", drv->ifname);
1116         else if (!(flags & IFF_UP)) {
1117                 if (wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
1118                         printf("Could not set interface '%s' UP\n",
1119                                drv->ifname);
1120                 } else {
1121                         /*
1122                          * Wait some time to allow driver to initialize before
1123                          * starting configuring the driver. This seems to be
1124                          * needed at least some drivers that load firmware etc.
1125                          * when the interface is set up.
1126                          */
1127                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
1128                                    "a second for the driver to complete "
1129                                    "initialization", drv->ifname);
1130                         sleep(1);
1131                 }
1132         }
1133
1134         /*
1135          * Make sure that the driver does not have any obsolete PMKID entries.
1136          */
1137         wpa_driver_wext_flush_pmkid(drv);
1138
1139         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
1140                 printf("Could not configure driver to use managed mode\n");
1141         }
1142
1143         wpa_driver_wext_get_range(drv);
1144
1145         drv->ifindex = if_nametoindex(drv->ifname);
1146
1147         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
1148                 /*
1149                  * Host AP driver may use both wlan# and wifi# interface in
1150                  * wireless events. Since some of the versions included WE-18
1151                  * support, let's add the alternative ifindex also from
1152                  * driver_wext.c for the time being. This may be removed at
1153                  * some point once it is believed that old versions of the
1154                  * driver are not in use anymore.
1155                  */
1156                 char ifname2[IFNAMSIZ + 1];
1157                 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
1158                 os_memcpy(ifname2, "wifi", 4);
1159                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
1160         }
1161
1162         wpa_driver_wext_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1163 }
1164
1165
1166 /**
1167  * wpa_driver_wext_deinit - Deinitialize WE driver interface
1168  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1169  *
1170  * Shut down driver interface and processing of driver events. Free
1171  * private data buffer if one was allocated in wpa_driver_wext_init().
1172  */
1173 void wpa_driver_wext_deinit(void *priv)
1174 {
1175         struct wpa_driver_wext_data *drv = priv;
1176         int flags;
1177
1178         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1179
1180         /*
1181          * Clear possibly configured driver parameters in order to make it
1182          * easier to use the driver after wpa_supplicant has been terminated.
1183          */
1184         (void) wpa_driver_wext_set_bssid(drv,
1185                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1186
1187         wpa_driver_wext_send_oper_ifla(priv, 0, IF_OPER_UP);
1188
1189         eloop_unregister_read_sock(drv->event_sock);
1190         if (drv->mlme_sock >= 0)
1191                 eloop_unregister_read_sock(drv->mlme_sock);
1192
1193         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
1194                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
1195
1196 #ifdef CONFIG_CLIENT_MLME
1197         if (drv->mlmedev[0]) {
1198                 if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev,
1199                                                        &flags) == 0)
1200                         (void) wpa_driver_wext_set_ifflags_ifname(
1201                                 drv, drv->mlmedev, flags & ~IFF_UP);
1202                 wpa_driver_prism2_param_set(drv, PRISM2_PARAM_MGMT_IF, 0);
1203                 wpa_driver_prism2_param_set(drv, PRISM2_PARAM_USER_SPACE_MLME,
1204                                             0);
1205         }
1206 #endif /* CONFIG_CLIENT_MLME */
1207
1208         close(drv->event_sock);
1209         close(drv->ioctl_sock);
1210         if (drv->mlme_sock >= 0)
1211                 close(drv->mlme_sock);
1212         os_free(drv->assoc_req_ies);
1213         os_free(drv->assoc_resp_ies);
1214         os_free(drv);
1215 }
1216
1217
1218 /**
1219  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1220  * @eloop_ctx: Unused
1221  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1222  *
1223  * This function can be used as registered timeout when starting a scan to
1224  * generate a scan completed event if the driver does not report this.
1225  */
1226 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1227 {
1228         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1229         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1230 }
1231
1232
1233 /**
1234  * wpa_driver_wext_scan - Request the driver to initiate scan
1235  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1236  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1237  *      all SSIDs (either active scan with broadcast SSID or passive
1238  *      scan
1239  * @ssid_len: Length of the SSID
1240  * Returns: 0 on success, -1 on failure
1241  */
1242 int wpa_driver_wext_scan(void *priv, const u8 *ssid, size_t ssid_len)
1243 {
1244         struct wpa_driver_wext_data *drv = priv;
1245         struct iwreq iwr;
1246         int ret = 0, timeout;
1247         struct iw_scan_req req;
1248
1249         if (ssid_len > IW_ESSID_MAX_SIZE) {
1250                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1251                            __FUNCTION__, (unsigned long) ssid_len);
1252                 return -1;
1253         }
1254
1255         os_memset(&iwr, 0, sizeof(iwr));
1256         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1257
1258         if (ssid && ssid_len) {
1259                 os_memset(&req, 0, sizeof(req));
1260                 req.essid_len = ssid_len;
1261                 req.bssid.sa_family = ARPHRD_ETHER;
1262                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1263                 os_memcpy(req.essid, ssid, ssid_len);
1264                 iwr.u.data.pointer = (caddr_t) &req;
1265                 iwr.u.data.length = sizeof(req);
1266                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1267         }
1268
1269         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1270                 perror("ioctl[SIOCSIWSCAN]");
1271                 ret = -1;
1272         }
1273
1274         /* Not all drivers generate "scan completed" wireless event, so try to
1275          * read results after a timeout. */
1276         timeout = 5;
1277         if (drv->scan_complete_events) {
1278                 /*
1279                  * The driver seems to deliver SIOCGIWSCAN events to notify
1280                  * when scan is complete, so use longer timeout to avoid race
1281                  * conditions with scanning and following association request.
1282                  */
1283                 timeout = 30;
1284         }
1285         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1286                    "seconds", ret, timeout);
1287         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1288         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1289                                drv->ctx);
1290
1291         return ret;
1292 }
1293
1294
1295 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1296                                     size_t *len)
1297 {
1298         struct iwreq iwr;
1299         u8 *res_buf;
1300         size_t res_buf_len;
1301
1302         res_buf_len = IW_SCAN_MAX_DATA;
1303         for (;;) {
1304                 res_buf = os_malloc(res_buf_len);
1305                 if (res_buf == NULL)
1306                         return NULL;
1307                 os_memset(&iwr, 0, sizeof(iwr));
1308                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1309                 iwr.u.data.pointer = res_buf;
1310                 iwr.u.data.length = res_buf_len;
1311
1312                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1313                         break;
1314
1315                 if (errno == E2BIG && res_buf_len < 100000) {
1316                         os_free(res_buf);
1317                         res_buf = NULL;
1318                         res_buf_len *= 2;
1319                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1320                                    "trying larger buffer (%lu bytes)",
1321                                    (unsigned long) res_buf_len);
1322                 } else {
1323                         perror("ioctl[SIOCGIWSCAN]");
1324                         os_free(res_buf);
1325                         return NULL;
1326                 }
1327         }
1328
1329         if (iwr.u.data.length > res_buf_len) {
1330                 os_free(res_buf);
1331                 return NULL;
1332         }
1333         *len = iwr.u.data.length;
1334
1335         return res_buf;
1336 }
1337
1338
1339 /*
1340  * Data structure for collecting WEXT scan results. This is needed to allow
1341  * the various methods of reporting IEs to be combined into a single IE buffer.
1342  */
1343 struct wext_scan_data {
1344         struct wpa_scan_res res;
1345         u8 *ie;
1346         size_t ie_len;
1347         u8 ssid[32];
1348         size_t ssid_len;
1349         int maxrate;
1350 };
1351
1352
1353 static void wext_get_scan_mode(struct iw_event *iwe,
1354                                struct wext_scan_data *res)
1355 {
1356         if (iwe->u.mode == IW_MODE_ADHOC)
1357                 res->res.caps |= IEEE80211_CAP_IBSS;
1358         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1359                 res->res.caps |= IEEE80211_CAP_ESS;
1360 }
1361
1362
1363 static void wext_get_scan_ssid(struct iw_event *iwe,
1364                                struct wext_scan_data *res, char *custom,
1365                                char *end)
1366 {
1367         int ssid_len = iwe->u.essid.length;
1368         if (custom + ssid_len > end)
1369                 return;
1370         if (iwe->u.essid.flags &&
1371             ssid_len > 0 &&
1372             ssid_len <= IW_ESSID_MAX_SIZE) {
1373                 os_memcpy(res->ssid, custom, ssid_len);
1374                 res->ssid_len = ssid_len;
1375         }
1376 }
1377
1378
1379 static void wext_get_scan_freq(struct iw_event *iwe,
1380                                struct wext_scan_data *res)
1381 {
1382         int divi = 1000000, i;
1383
1384         if (iwe->u.freq.e == 0) {
1385                 /*
1386                  * Some drivers do not report frequency, but a channel.
1387                  * Try to map this to frequency by assuming they are using
1388                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1389                  * frequency if the driver sends both frequency and channel,
1390                  * since the driver may be sending an A-band channel that we
1391                  * don't handle here.
1392                  */
1393
1394                 if (res->res.freq)
1395                         return;
1396
1397                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1398                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1399                         return;
1400                 } else if (iwe->u.freq.m == 14) {
1401                         res->res.freq = 2484;
1402                         return;
1403                 }
1404         }
1405
1406         if (iwe->u.freq.e > 6) {
1407                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1408                            MACSTR " m=%d e=%d)",
1409                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1410                            iwe->u.freq.e);
1411                 return;
1412         }
1413
1414         for (i = 0; i < iwe->u.freq.e; i++)
1415                 divi /= 10;
1416         res->res.freq = iwe->u.freq.m / divi;
1417 }
1418
1419
1420 static void wext_get_scan_qual(struct iw_event *iwe,
1421                                struct wext_scan_data *res)
1422 {
1423         res->res.qual = iwe->u.qual.qual;
1424         res->res.noise = iwe->u.qual.noise;
1425         res->res.level = iwe->u.qual.level;
1426 }
1427
1428
1429 static void wext_get_scan_encode(struct iw_event *iwe,
1430                                  struct wext_scan_data *res)
1431 {
1432         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1433                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1434 }
1435
1436
1437 static void wext_get_scan_rate(struct iw_event *iwe,
1438                                struct wext_scan_data *res, char *pos,
1439                                char *end)
1440 {
1441         int maxrate;
1442         char *custom = pos + IW_EV_LCP_LEN;
1443         struct iw_param p;
1444         size_t clen;
1445
1446         clen = iwe->len;
1447         if (custom + clen > end)
1448                 return;
1449         maxrate = 0;
1450         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1451                 /* Note: may be misaligned, make a local, aligned copy */
1452                 os_memcpy(&p, custom, sizeof(struct iw_param));
1453                 if (p.value > maxrate)
1454                         maxrate = p.value;
1455                 clen -= sizeof(struct iw_param);
1456                 custom += sizeof(struct iw_param);
1457         }
1458
1459         /* Convert the maxrate from WE-style (b/s units) to
1460          * 802.11 rates (500000 b/s units).
1461          */
1462         res->maxrate = maxrate / 500000;
1463 }
1464
1465
1466 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1467                                     struct wext_scan_data *res, char *custom,
1468                                     char *end)
1469 {
1470         char *genie, *gpos, *gend;
1471         u8 *tmp;
1472
1473         if (iwe->u.data.length == 0)
1474                 return;
1475
1476         gpos = genie = custom;
1477         gend = genie + iwe->u.data.length;
1478         if (gend > end) {
1479                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1480                 return;
1481         }
1482
1483         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1484         if (tmp == NULL)
1485                 return;
1486         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1487         res->ie = tmp;
1488         res->ie_len += gend - gpos;
1489 }
1490
1491
1492 static void wext_get_scan_custom(struct iw_event *iwe,
1493                                  struct wext_scan_data *res, char *custom,
1494                                  char *end)
1495 {
1496         size_t clen;
1497         u8 *tmp;
1498
1499         clen = iwe->u.data.length;
1500         if (custom + clen > end)
1501                 return;
1502
1503         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1504                 char *spos;
1505                 int bytes;
1506                 spos = custom + 7;
1507                 bytes = custom + clen - spos;
1508                 if (bytes & 1 || bytes == 0)
1509                         return;
1510                 bytes /= 2;
1511                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1512                 if (tmp == NULL)
1513                         return;
1514                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1515                 res->ie = tmp;
1516                 res->ie_len += bytes;
1517         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1518                 char *spos;
1519                 int bytes;
1520                 spos = custom + 7;
1521                 bytes = custom + clen - spos;
1522                 if (bytes & 1 || bytes == 0)
1523                         return;
1524                 bytes /= 2;
1525                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1526                 if (tmp == NULL)
1527                         return;
1528                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1529                 res->ie = tmp;
1530                 res->ie_len += bytes;
1531         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1532                 char *spos;
1533                 int bytes;
1534                 u8 bin[8];
1535                 spos = custom + 4;
1536                 bytes = custom + clen - spos;
1537                 if (bytes != 16) {
1538                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1539                         return;
1540                 }
1541                 bytes /= 2;
1542                 hexstr2bin(spos, bin, bytes);
1543                 res->res.tsf += WPA_GET_BE64(bin);
1544         }
1545 }
1546
1547
1548 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1549 {
1550         return drv->we_version_compiled > 18 &&
1551                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1552                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1553 }
1554
1555
1556 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1557                                            struct wext_scan_data *data)
1558 {
1559         struct wpa_scan_res **tmp;
1560         struct wpa_scan_res *r;
1561         size_t extra_len;
1562         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1563
1564         /* Figure out whether we need to fake any IEs */
1565         pos = data->ie;
1566         end = pos + data->ie_len;
1567         while (pos && pos + 1 < end) {
1568                 if (pos + 2 + pos[1] > end)
1569                         break;
1570                 if (pos[0] == WLAN_EID_SSID)
1571                         ssid_ie = pos;
1572                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1573                         rate_ie = pos;
1574                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1575                         rate_ie = pos;
1576                 pos += 2 + pos[1];
1577         }
1578
1579         extra_len = 0;
1580         if (ssid_ie == NULL)
1581                 extra_len += 2 + data->ssid_len;
1582         if (rate_ie == NULL && data->maxrate)
1583                 extra_len += 3;
1584
1585         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1586         if (r == NULL)
1587                 return;
1588         os_memcpy(r, &data->res, sizeof(*r));
1589         r->ie_len = extra_len + data->ie_len;
1590         pos = (u8 *) (r + 1);
1591         if (ssid_ie == NULL) {
1592                 /*
1593                  * Generate a fake SSID IE since the driver did not report
1594                  * a full IE list.
1595                  */
1596                 *pos++ = WLAN_EID_SSID;
1597                 *pos++ = data->ssid_len;
1598                 os_memcpy(pos, data->ssid, data->ssid_len);
1599                 pos += data->ssid_len;
1600         }
1601         if (rate_ie == NULL && data->maxrate) {
1602                 /*
1603                  * Generate a fake Supported Rates IE since the driver did not
1604                  * report a full IE list.
1605                  */
1606                 *pos++ = WLAN_EID_SUPP_RATES;
1607                 *pos++ = 1;
1608                 *pos++ = data->maxrate;
1609         }
1610         if (data->ie)
1611                 os_memcpy(pos, data->ie, data->ie_len);
1612
1613         tmp = os_realloc(res->res,
1614                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1615         if (tmp == NULL) {
1616                 os_free(r);
1617                 return;
1618         }
1619         tmp[res->num++] = r;
1620         res->res = tmp;
1621 }
1622
1623
1624 /**
1625  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1626  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1627  * Returns: Scan results on success, -1 on failure
1628  */
1629 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1630 {
1631         struct wpa_driver_wext_data *drv = priv;
1632         size_t ap_num = 0, len;
1633         int first;
1634         u8 *res_buf;
1635         struct iw_event iwe_buf, *iwe = &iwe_buf;
1636         char *pos, *end, *custom;
1637         struct wpa_scan_results *res;
1638         struct wext_scan_data data;
1639
1640         res_buf = wpa_driver_wext_giwscan(drv, &len);
1641         if (res_buf == NULL)
1642                 return NULL;
1643
1644         ap_num = 0;
1645         first = 1;
1646
1647         res = os_zalloc(sizeof(*res));
1648         if (res == NULL) {
1649                 os_free(res_buf);
1650                 return NULL;
1651         }
1652
1653         pos = (char *) res_buf;
1654         end = (char *) res_buf + len;
1655         os_memset(&data, 0, sizeof(data));
1656
1657         while (pos + IW_EV_LCP_LEN <= end) {
1658                 /* Event data may be unaligned, so make a local, aligned copy
1659                  * before processing. */
1660                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1661                 if (iwe->len <= IW_EV_LCP_LEN)
1662                         break;
1663
1664                 custom = pos + IW_EV_POINT_LEN;
1665                 if (wext_19_iw_point(drv, iwe->cmd)) {
1666                         /* WE-19 removed the pointer from struct iw_point */
1667                         char *dpos = (char *) &iwe_buf.u.data.length;
1668                         int dlen = dpos - (char *) &iwe_buf;
1669                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1670                                   sizeof(struct iw_event) - dlen);
1671                 } else {
1672                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1673                         custom += IW_EV_POINT_OFF;
1674                 }
1675
1676                 switch (iwe->cmd) {
1677                 case SIOCGIWAP:
1678                         if (!first)
1679                                 wpa_driver_wext_add_scan_entry(res, &data);
1680                         first = 0;
1681                         os_free(data.ie);
1682                         os_memset(&data, 0, sizeof(data));
1683                         os_memcpy(data.res.bssid,
1684                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1685                         break;
1686                 case SIOCGIWMODE:
1687                         wext_get_scan_mode(iwe, &data);
1688                         break;
1689                 case SIOCGIWESSID:
1690                         wext_get_scan_ssid(iwe, &data, custom, end);
1691                         break;
1692                 case SIOCGIWFREQ:
1693                         wext_get_scan_freq(iwe, &data);
1694                         break;
1695                 case IWEVQUAL:
1696                         wext_get_scan_qual(iwe, &data);
1697                         break;
1698                 case SIOCGIWENCODE:
1699                         wext_get_scan_encode(iwe, &data);
1700                         break;
1701                 case SIOCGIWRATE:
1702                         wext_get_scan_rate(iwe, &data, pos, end);
1703                         break;
1704                 case IWEVGENIE:
1705                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1706                         break;
1707                 case IWEVCUSTOM:
1708                         wext_get_scan_custom(iwe, &data, custom, end);
1709                         break;
1710                 }
1711
1712                 pos += iwe->len;
1713         }
1714         os_free(res_buf);
1715         res_buf = NULL;
1716         if (!first)
1717                 wpa_driver_wext_add_scan_entry(res, &data);
1718         os_free(data.ie);
1719
1720         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1721                    (unsigned long) len, (unsigned long) res->num);
1722
1723         return res;
1724 }
1725
1726
1727 static int wpa_driver_wext_get_range(void *priv)
1728 {
1729         struct wpa_driver_wext_data *drv = priv;
1730         struct iw_range *range;
1731         struct iwreq iwr;
1732         int minlen;
1733         size_t buflen;
1734
1735         /*
1736          * Use larger buffer than struct iw_range in order to allow the
1737          * structure to grow in the future.
1738          */
1739         buflen = sizeof(struct iw_range) + 500;
1740         range = os_zalloc(buflen);
1741         if (range == NULL)
1742                 return -1;
1743
1744         os_memset(&iwr, 0, sizeof(iwr));
1745         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1746         iwr.u.data.pointer = (caddr_t) range;
1747         iwr.u.data.length = buflen;
1748
1749         minlen = ((char *) &range->enc_capa) - (char *) range +
1750                 sizeof(range->enc_capa);
1751
1752         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1753                 perror("ioctl[SIOCGIWRANGE]");
1754                 os_free(range);
1755                 return -1;
1756         } else if (iwr.u.data.length >= minlen &&
1757                    range->we_version_compiled >= 18) {
1758                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1759                            "WE(source)=%d enc_capa=0x%x",
1760                            range->we_version_compiled,
1761                            range->we_version_source,
1762                            range->enc_capa);
1763                 drv->has_capability = 1;
1764                 drv->we_version_compiled = range->we_version_compiled;
1765                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1766                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1767                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1768                 }
1769                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1770                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1771                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1772                 }
1773                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1774                         WPA_DRIVER_CAPA_ENC_WEP104;
1775                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1776                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1777                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1778                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1779                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1780                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1781
1782                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1783                            "flags 0x%x",
1784                            drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1785         } else {
1786                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1787                            "assuming WPA is not supported");
1788         }
1789
1790         os_free(range);
1791         return 0;
1792 }
1793
1794
1795 static int wpa_driver_wext_set_wpa(void *priv, int enabled)
1796 {
1797         struct wpa_driver_wext_data *drv = priv;
1798         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1799
1800         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1801                                               enabled);
1802 }
1803
1804
1805 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1806                                    const u8 *psk)
1807 {
1808         struct iw_encode_ext *ext;
1809         struct iwreq iwr;
1810         int ret;
1811
1812         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1813
1814         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1815                 return 0;
1816
1817         if (!psk)
1818                 return 0;
1819
1820         os_memset(&iwr, 0, sizeof(iwr));
1821         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1822
1823         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1824         if (ext == NULL)
1825                 return -1;
1826
1827         iwr.u.encoding.pointer = (caddr_t) ext;
1828         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1829         ext->key_len = PMK_LEN;
1830         os_memcpy(&ext->key, psk, ext->key_len);
1831         ext->alg = IW_ENCODE_ALG_PMK;
1832
1833         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1834         if (ret < 0)
1835                 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1836         os_free(ext);
1837
1838         return ret;
1839 }
1840
1841
1842 static int wpa_driver_wext_set_key_ext(void *priv, wpa_alg alg,
1843                                        const u8 *addr, int key_idx,
1844                                        int set_tx, const u8 *seq,
1845                                        size_t seq_len,
1846                                        const u8 *key, size_t key_len)
1847 {
1848         struct wpa_driver_wext_data *drv = priv;
1849         struct iwreq iwr;
1850         int ret = 0;
1851         struct iw_encode_ext *ext;
1852
1853         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1854                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1855                            __FUNCTION__, (unsigned long) seq_len);
1856                 return -1;
1857         }
1858
1859         ext = os_zalloc(sizeof(*ext) + key_len);
1860         if (ext == NULL)
1861                 return -1;
1862         os_memset(&iwr, 0, sizeof(iwr));
1863         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1864         iwr.u.encoding.flags = key_idx + 1;
1865         if (alg == WPA_ALG_NONE)
1866                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1867         iwr.u.encoding.pointer = (caddr_t) ext;
1868         iwr.u.encoding.length = sizeof(*ext) + key_len;
1869
1870         if (addr == NULL ||
1871             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1872                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1873         if (set_tx)
1874                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1875
1876         ext->addr.sa_family = ARPHRD_ETHER;
1877         if (addr)
1878                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1879         else
1880                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1881         if (key && key_len) {
1882                 os_memcpy(ext + 1, key, key_len);
1883                 ext->key_len = key_len;
1884         }
1885         switch (alg) {
1886         case WPA_ALG_NONE:
1887                 ext->alg = IW_ENCODE_ALG_NONE;
1888                 break;
1889         case WPA_ALG_WEP:
1890                 ext->alg = IW_ENCODE_ALG_WEP;
1891                 break;
1892         case WPA_ALG_TKIP:
1893                 ext->alg = IW_ENCODE_ALG_TKIP;
1894                 break;
1895         case WPA_ALG_CCMP:
1896                 ext->alg = IW_ENCODE_ALG_CCMP;
1897                 break;
1898         case WPA_ALG_PMK:
1899                 ext->alg = IW_ENCODE_ALG_PMK;
1900                 break;
1901 #ifdef WEXT_MFP_PENDING
1902 #ifdef CONFIG_IEEE80211W
1903         case WPA_ALG_IGTK:
1904                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1905                 break;
1906 #endif /* CONFIG_IEEE80211W */
1907 #endif /* WEXT_MFP_PENDING */
1908         default:
1909                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1910                            __FUNCTION__, alg);
1911                 os_free(ext);
1912                 return -1;
1913         }
1914
1915         if (seq && seq_len) {
1916                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1917                 os_memcpy(ext->rx_seq, seq, seq_len);
1918         }
1919
1920         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1921                 ret = errno == EOPNOTSUPP ? -2 : -1;
1922                 if (errno == ENODEV) {
1923                         /*
1924                          * ndiswrapper seems to be returning incorrect error
1925                          * code.. */
1926                         ret = -2;
1927                 }
1928
1929                 perror("ioctl[SIOCSIWENCODEEXT]");
1930         }
1931
1932         os_free(ext);
1933         return ret;
1934 }
1935
1936
1937 /**
1938  * wpa_driver_wext_set_key - Configure encryption key
1939  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1940  * @priv: Private driver interface data
1941  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1942  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1943  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1944  *      broadcast/default keys
1945  * @key_idx: key index (0..3), usually 0 for unicast keys
1946  * @set_tx: Configure this key as the default Tx key (only used when
1947  *      driver does not support separate unicast/individual key
1948  * @seq: Sequence number/packet number, seq_len octets, the next
1949  *      packet number to be used for in replay protection; configured
1950  *      for Rx keys (in most cases, this is only used with broadcast
1951  *      keys and set to zero for unicast keys)
1952  * @seq_len: Length of the seq, depends on the algorithm:
1953  *      TKIP: 6 octets, CCMP: 6 octets
1954  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1955  *      8-byte Rx Mic Key
1956  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1957  *      TKIP: 32, CCMP: 16)
1958  * Returns: 0 on success, -1 on failure
1959  *
1960  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1961  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1962  */
1963 int wpa_driver_wext_set_key(void *priv, wpa_alg alg,
1964                             const u8 *addr, int key_idx,
1965                             int set_tx, const u8 *seq, size_t seq_len,
1966                             const u8 *key, size_t key_len)
1967 {
1968         struct wpa_driver_wext_data *drv = priv;
1969         struct iwreq iwr;
1970         int ret = 0;
1971
1972         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1973                    "key_len=%lu",
1974                    __FUNCTION__, alg, key_idx, set_tx,
1975                    (unsigned long) seq_len, (unsigned long) key_len);
1976
1977         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1978                                           seq, seq_len, key, key_len);
1979         if (ret == 0)
1980                 return 0;
1981
1982         if (ret == -2 &&
1983             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1984                 wpa_printf(MSG_DEBUG, "Driver did not support "
1985                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1986                 ret = 0;
1987         } else {
1988                 wpa_printf(MSG_DEBUG, "Driver did not support "
1989                            "SIOCSIWENCODEEXT");
1990                 return ret;
1991         }
1992
1993         os_memset(&iwr, 0, sizeof(iwr));
1994         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1995         iwr.u.encoding.flags = key_idx + 1;
1996         if (alg == WPA_ALG_NONE)
1997                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1998         iwr.u.encoding.pointer = (caddr_t) key;
1999         iwr.u.encoding.length = key_len;
2000
2001         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2002                 perror("ioctl[SIOCSIWENCODE]");
2003                 ret = -1;
2004         }
2005
2006         if (set_tx && alg != WPA_ALG_NONE) {
2007                 os_memset(&iwr, 0, sizeof(iwr));
2008                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2009                 iwr.u.encoding.flags = key_idx + 1;
2010                 iwr.u.encoding.pointer = (caddr_t) NULL;
2011                 iwr.u.encoding.length = 0;
2012                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2013                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
2014                         ret = -1;
2015                 }
2016         }
2017
2018         return ret;
2019 }
2020
2021
2022 static int wpa_driver_wext_set_countermeasures(void *priv,
2023                                                int enabled)
2024 {
2025         struct wpa_driver_wext_data *drv = priv;
2026         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2027         return wpa_driver_wext_set_auth_param(drv,
2028                                               IW_AUTH_TKIP_COUNTERMEASURES,
2029                                               enabled);
2030 }
2031
2032
2033 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
2034                                                 int enabled)
2035 {
2036         struct wpa_driver_wext_data *drv = priv;
2037         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2038         drv->use_crypt = enabled;
2039         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2040                                               enabled);
2041 }
2042
2043
2044 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
2045                                 const u8 *addr, int cmd, int reason_code)
2046 {
2047         struct iwreq iwr;
2048         struct iw_mlme mlme;
2049         int ret = 0;
2050
2051         os_memset(&iwr, 0, sizeof(iwr));
2052         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2053         os_memset(&mlme, 0, sizeof(mlme));
2054         mlme.cmd = cmd;
2055         mlme.reason_code = reason_code;
2056         mlme.addr.sa_family = ARPHRD_ETHER;
2057         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
2058         iwr.u.data.pointer = (caddr_t) &mlme;
2059         iwr.u.data.length = sizeof(mlme);
2060
2061         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
2062                 perror("ioctl[SIOCSIWMLME]");
2063                 ret = -1;
2064         }
2065
2066         return ret;
2067 }
2068
2069
2070 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
2071                                           int reason_code)
2072 {
2073         struct wpa_driver_wext_data *drv = priv;
2074         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2075         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2076 }
2077
2078
2079 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
2080                                         int reason_code)
2081 {
2082         struct wpa_driver_wext_data *drv = priv;
2083         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2084         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC,
2085                                     reason_code);
2086 }
2087
2088
2089 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
2090                                       size_t ie_len)
2091 {
2092         struct wpa_driver_wext_data *drv = priv;
2093         struct iwreq iwr;
2094         int ret = 0;
2095
2096         os_memset(&iwr, 0, sizeof(iwr));
2097         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2098         iwr.u.data.pointer = (caddr_t) ie;
2099         iwr.u.data.length = ie_len;
2100
2101         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2102                 perror("ioctl[SIOCSIWGENIE]");
2103                 ret = -1;
2104         }
2105
2106         return ret;
2107 }
2108
2109
2110 int wpa_driver_wext_cipher2wext(int cipher)
2111 {
2112         switch (cipher) {
2113         case CIPHER_NONE:
2114                 return IW_AUTH_CIPHER_NONE;
2115         case CIPHER_WEP40:
2116                 return IW_AUTH_CIPHER_WEP40;
2117         case CIPHER_TKIP:
2118                 return IW_AUTH_CIPHER_TKIP;
2119         case CIPHER_CCMP:
2120                 return IW_AUTH_CIPHER_CCMP;
2121         case CIPHER_WEP104:
2122                 return IW_AUTH_CIPHER_WEP104;
2123         default:
2124                 return 0;
2125         }
2126 }
2127
2128
2129 int wpa_driver_wext_keymgmt2wext(int keymgmt)
2130 {
2131         switch (keymgmt) {
2132         case KEY_MGMT_802_1X:
2133         case KEY_MGMT_802_1X_NO_WPA:
2134                 return IW_AUTH_KEY_MGMT_802_1X;
2135         case KEY_MGMT_PSK:
2136                 return IW_AUTH_KEY_MGMT_PSK;
2137         default:
2138                 return 0;
2139         }
2140 }
2141
2142
2143 static int
2144 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
2145                                   struct wpa_driver_associate_params *params)
2146 {
2147         struct iwreq iwr;
2148         int ret = 0;
2149
2150         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2151                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2152
2153         os_memset(&iwr, 0, sizeof(iwr));
2154         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2155         /* Just changing mode, not actual keys */
2156         iwr.u.encoding.flags = 0;
2157         iwr.u.encoding.pointer = (caddr_t) NULL;
2158         iwr.u.encoding.length = 0;
2159
2160         /*
2161          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2162          * different things. Here they are used to indicate Open System vs.
2163          * Shared Key authentication algorithm. However, some drivers may use
2164          * them to select between open/restricted WEP encrypted (open = allow
2165          * both unencrypted and encrypted frames; restricted = only allow
2166          * encrypted frames).
2167          */
2168
2169         if (!drv->use_crypt) {
2170                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2171         } else {
2172                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2173                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2174                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2175                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2176         }
2177
2178         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2179                 perror("ioctl[SIOCSIWENCODE]");
2180                 ret = -1;
2181         }
2182
2183         return ret;
2184 }
2185
2186
2187 int wpa_driver_wext_associate(void *priv,
2188                               struct wpa_driver_associate_params *params)
2189 {
2190         struct wpa_driver_wext_data *drv = priv;
2191         int ret = 0;
2192         int allow_unencrypted_eapol;
2193         int value;
2194
2195         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2196
2197         /*
2198          * If the driver did not support SIOCSIWAUTH, fallback to
2199          * SIOCSIWENCODE here.
2200          */
2201         if (drv->auth_alg_fallback &&
2202             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2203                 ret = -1;
2204
2205         if (!params->bssid &&
2206             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2207                 ret = -1;
2208
2209         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2210                 ret = -1;
2211         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2212          * from configuration, not from here, where only the selected suite is
2213          * available */
2214         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2215             < 0)
2216                 ret = -1;
2217         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2218                 value = IW_AUTH_WPA_VERSION_DISABLED;
2219         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2220                 value = IW_AUTH_WPA_VERSION_WPA2;
2221         else
2222                 value = IW_AUTH_WPA_VERSION_WPA;
2223         if (wpa_driver_wext_set_auth_param(drv,
2224                                            IW_AUTH_WPA_VERSION, value) < 0)
2225                 ret = -1;
2226         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2227         if (wpa_driver_wext_set_auth_param(drv,
2228                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2229                 ret = -1;
2230         value = wpa_driver_wext_cipher2wext(params->group_suite);
2231         if (wpa_driver_wext_set_auth_param(drv,
2232                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2233                 ret = -1;
2234         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2235         if (wpa_driver_wext_set_auth_param(drv,
2236                                            IW_AUTH_KEY_MGMT, value) < 0)
2237                 ret = -1;
2238         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2239                 params->pairwise_suite != CIPHER_NONE ||
2240                 params->group_suite != CIPHER_NONE ||
2241                 params->wpa_ie_len;
2242         if (wpa_driver_wext_set_auth_param(drv,
2243                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2244                 ret = -1;
2245
2246         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2247          * not using WPA. IEEE 802.1X specifies that these frames are not
2248          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2249         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2250             params->key_mgmt_suite == KEY_MGMT_PSK)
2251                 allow_unencrypted_eapol = 0;
2252         else
2253                 allow_unencrypted_eapol = 1;
2254
2255         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2256                 ret = -1;
2257         if (wpa_driver_wext_set_auth_param(drv,
2258                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2259                                            allow_unencrypted_eapol) < 0)
2260                 ret = -1;
2261 #ifdef WEXT_MFP_PENDING
2262 #ifdef CONFIG_IEEE80211W
2263         switch (params->mgmt_frame_protection) {
2264         case NO_MGMT_FRAME_PROTECTION:
2265                 value = IW_AUTH_MFP_DISABLED;
2266                 break;
2267         case MGMT_FRAME_PROTECTION_OPTIONAL:
2268                 value = IW_AUTH_MFP_OPTIONAL;
2269                 break;
2270         case MGMT_FRAME_PROTECTION_REQUIRED:
2271                 value = IW_AUTH_MFP_REQUIRED;
2272                 break;
2273         };
2274         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2275                 ret = -1;
2276 #endif /* CONFIG_IEEE80211W */
2277 #endif /* WEXT_MFP_PENDING */
2278         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2279                 ret = -1;
2280         if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2281                 ret = -1;
2282         if (params->bssid &&
2283             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2284                 ret = -1;
2285
2286         return ret;
2287 }
2288
2289
2290 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2291 {
2292         struct wpa_driver_wext_data *drv = priv;
2293         int algs = 0, res;
2294
2295         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2296                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2297         if (auth_alg & AUTH_ALG_SHARED_KEY)
2298                 algs |= IW_AUTH_ALG_SHARED_KEY;
2299         if (auth_alg & AUTH_ALG_LEAP)
2300                 algs |= IW_AUTH_ALG_LEAP;
2301         if (algs == 0) {
2302                 /* at least one algorithm should be set */
2303                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2304         }
2305
2306         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2307                                              algs);
2308         drv->auth_alg_fallback = res == -2;
2309         return res;
2310 }
2311
2312
2313 /**
2314  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2315  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2316  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2317  * Returns: 0 on success, -1 on failure
2318  */
2319 int wpa_driver_wext_set_mode(void *priv, int mode)
2320 {
2321         struct wpa_driver_wext_data *drv = priv;
2322         struct iwreq iwr;
2323         int ret = -1, flags;
2324         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2325
2326         os_memset(&iwr, 0, sizeof(iwr));
2327         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2328         iwr.u.mode = new_mode;
2329         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2330                 ret = 0;
2331                 goto done;
2332         }
2333
2334         if (errno != EBUSY) {
2335                 perror("ioctl[SIOCSIWMODE]");
2336                 goto done;
2337         }
2338
2339         /* mac80211 doesn't allow mode changes while the device is up, so if
2340          * the device isn't in the mode we're about to change to, take device
2341          * down, try to set the mode again, and bring it back up.
2342          */
2343         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2344                 perror("ioctl[SIOCGIWMODE]");
2345                 goto done;
2346         }
2347
2348         if (iwr.u.mode == new_mode) {
2349                 ret = 0;
2350                 goto done;
2351         }
2352
2353         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2354                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2355
2356                 /* Try to set the mode again while the interface is down */
2357                 iwr.u.mode = new_mode;
2358                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2359                         perror("ioctl[SIOCSIWMODE]");
2360                 else
2361                         ret = 0;
2362
2363                 /* Ignore return value of get_ifflags to ensure that the device
2364                  * is always up like it was before this function was called.
2365                  */
2366                 (void) wpa_driver_wext_get_ifflags(drv, &flags);
2367                 (void) wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2368         }
2369
2370 done:
2371         return ret;
2372 }
2373
2374
2375 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2376                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2377 {
2378         struct iwreq iwr;
2379         struct iw_pmksa pmksa;
2380         int ret = 0;
2381
2382         os_memset(&iwr, 0, sizeof(iwr));
2383         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2384         os_memset(&pmksa, 0, sizeof(pmksa));
2385         pmksa.cmd = cmd;
2386         pmksa.bssid.sa_family = ARPHRD_ETHER;
2387         if (bssid)
2388                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2389         if (pmkid)
2390                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2391         iwr.u.data.pointer = (caddr_t) &pmksa;
2392         iwr.u.data.length = sizeof(pmksa);
2393
2394         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2395                 if (errno != EOPNOTSUPP)
2396                         perror("ioctl[SIOCSIWPMKSA]");
2397                 ret = -1;
2398         }
2399
2400         return ret;
2401 }
2402
2403
2404 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2405                                      const u8 *pmkid)
2406 {
2407         struct wpa_driver_wext_data *drv = priv;
2408         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2409 }
2410
2411
2412 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2413                                         const u8 *pmkid)
2414 {
2415         struct wpa_driver_wext_data *drv = priv;
2416         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2417 }
2418
2419
2420 static int wpa_driver_wext_flush_pmkid(void *priv)
2421 {
2422         struct wpa_driver_wext_data *drv = priv;
2423         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2424 }
2425
2426
2427 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2428 {
2429         struct wpa_driver_wext_data *drv = priv;
2430         if (!drv->has_capability)
2431                 return -1;
2432         os_memcpy(capa, &drv->capa, sizeof(*capa));
2433         return 0;
2434 }
2435
2436
2437 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2438                                         const char *ifname)
2439 {
2440         if (ifname == NULL) {
2441                 drv->ifindex2 = -1;
2442                 return 0;
2443         }
2444
2445         drv->ifindex2 = if_nametoindex(ifname);
2446         if (drv->ifindex2 <= 0)
2447                 return -1;
2448
2449         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2450                    "wireless events", drv->ifindex2, ifname);
2451
2452         return 0;
2453 }
2454
2455
2456 int wpa_driver_wext_set_operstate(void *priv, int state)
2457 {
2458         struct wpa_driver_wext_data *drv = priv;
2459
2460         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2461                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2462         drv->operstate = state;
2463         return wpa_driver_wext_send_oper_ifla(
2464                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2465 }
2466
2467
2468 #ifdef CONFIG_CLIENT_MLME
2469 static int hostapd_ioctl(struct wpa_driver_wext_data *drv,
2470                          struct prism2_hostapd_param *param, int len)
2471 {
2472         struct iwreq iwr;
2473
2474         os_memset(&iwr, 0, sizeof(iwr));
2475         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2476         iwr.u.data.pointer = (caddr_t) param;
2477         iwr.u.data.length = len;
2478
2479         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
2480                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2481                 return -1;
2482         }
2483
2484         return 0;
2485 }
2486
2487
2488 static struct wpa_hw_modes *
2489 wpa_driver_wext_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2490 {
2491         struct wpa_driver_wext_data *drv = priv;
2492         struct prism2_hostapd_param *param;
2493         u8 *pos, *end;
2494         struct wpa_hw_modes *modes = NULL;
2495         int i;
2496
2497         param = os_zalloc(PRISM2_HOSTAPD_MAX_BUF_SIZE);
2498         if (param == NULL)
2499                 return NULL;
2500         param->cmd = PRISM2_HOSTAPD_GET_HW_FEATURES;
2501
2502         if (hostapd_ioctl(drv, param, PRISM2_HOSTAPD_MAX_BUF_SIZE) < 0) {
2503                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2504                 goto out;
2505         }
2506
2507         *num_modes = param->u.hw_features.num_modes;
2508         *flags = param->u.hw_features.flags;
2509
2510         pos = param->u.hw_features.data;
2511         end = pos + PRISM2_HOSTAPD_MAX_BUF_SIZE -
2512                 (param->u.hw_features.data - (u8 *) param);
2513
2514         modes = os_zalloc(*num_modes * sizeof(struct wpa_hw_modes));
2515         if (modes == NULL)
2516                 goto out;
2517
2518         for (i = 0; i < *num_modes; i++) {
2519                 struct hostapd_ioctl_hw_modes_hdr *hdr;
2520                 struct wpa_hw_modes *feature;
2521                 int clen, rlen;
2522
2523                 hdr = (struct hostapd_ioctl_hw_modes_hdr *) pos;
2524                 pos = (u8 *) (hdr + 1);
2525                 clen = hdr->num_channels * sizeof(struct wpa_channel_data);
2526                 rlen = hdr->num_rates * sizeof(struct wpa_rate_data);
2527
2528                 feature = &modes[i];
2529                 switch (hdr->mode) {
2530                 case MODE_IEEE80211A:
2531                         feature->mode = WPA_MODE_IEEE80211A;
2532                         break;
2533                 case MODE_IEEE80211B:
2534                         feature->mode = WPA_MODE_IEEE80211B;
2535                         break;
2536                 case MODE_IEEE80211G:
2537                         feature->mode = WPA_MODE_IEEE80211G;
2538                         break;
2539                 case MODE_ATHEROS_TURBO:
2540                 case MODE_ATHEROS_TURBOG:
2541                         wpa_printf(MSG_ERROR, "Skip unsupported hw_mode=%d in "
2542                                    "get_hw_features data", hdr->mode);
2543                         pos += clen + rlen;
2544                         continue;
2545                 default:
2546                         wpa_printf(MSG_ERROR, "Unknown hw_mode=%d in "
2547                                    "get_hw_features data", hdr->mode);
2548                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2549                         modes = NULL;
2550                         break;
2551                 }
2552                 feature->num_channels = hdr->num_channels;
2553                 feature->num_rates = hdr->num_rates;
2554
2555                 feature->channels = os_malloc(clen);
2556                 feature->rates = os_malloc(rlen);
2557                 if (!feature->channels || !feature->rates ||
2558                     pos + clen + rlen > end) {
2559                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2560                         modes = NULL;
2561                         break;
2562                 }
2563
2564                 os_memcpy(feature->channels, pos, clen);
2565                 pos += clen;
2566                 os_memcpy(feature->rates, pos, rlen);
2567                 pos += rlen;
2568         }
2569
2570 out:
2571         os_free(param);
2572         return modes;
2573 }
2574
2575
2576 int wpa_driver_wext_set_channel(void *priv, wpa_hw_mode phymode, int chan,
2577                                 int freq)
2578 {
2579         return wpa_driver_wext_set_freq(priv, freq);
2580 }
2581
2582
2583 static void wpa_driver_wext_mlme_read(int sock, void *eloop_ctx,
2584                                       void *sock_ctx)
2585 {
2586         struct wpa_driver_wext_data *drv = eloop_ctx;
2587         int len;
2588         unsigned char buf[3000];
2589         struct ieee80211_frame_info *fi;
2590         struct ieee80211_rx_status rx_status;
2591
2592         len = recv(sock, buf, sizeof(buf), 0);
2593         if (len < 0) {
2594                 perror("recv[MLME]");
2595                 return;
2596         }
2597
2598         if (len < (int) sizeof(struct ieee80211_frame_info)) {
2599                 wpa_printf(MSG_DEBUG, "WEXT: Too short MLME frame (len=%d)",
2600                            len);
2601                 return;
2602         }
2603
2604         fi = (struct ieee80211_frame_info *) buf;
2605         if (ntohl(fi->version) != IEEE80211_FI_VERSION) {
2606                 wpa_printf(MSG_DEBUG, "WEXT: Invalid MLME frame info version "
2607                            "0x%x", ntohl(fi->version));
2608                 return;
2609         }
2610
2611         os_memset(&rx_status, 0, sizeof(rx_status));
2612         rx_status.ssi = ntohl(fi->ssi_signal);
2613         rx_status.channel = ntohl(fi->channel);
2614
2615         wpa_supplicant_sta_rx(drv->ctx,
2616                               buf + sizeof(struct ieee80211_frame_info),
2617                               len - sizeof(struct ieee80211_frame_info),
2618                               &rx_status);
2619 }
2620
2621
2622 static int wpa_driver_wext_open_mlme(struct wpa_driver_wext_data *drv)
2623 {
2624         int flags, ifindex, s;
2625         struct sockaddr_ll addr;
2626         struct ifreq ifr;
2627
2628         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_USER_SPACE_MLME, 1) <
2629             0) {
2630                 wpa_printf(MSG_ERROR, "WEXT: Failed to configure driver to "
2631                            "use user space MLME");
2632                 return -1;
2633         }
2634
2635         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_MGMT_IF, 1) < 0) {
2636                 wpa_printf(MSG_ERROR, "WEXT: Failed to add management "
2637                            "interface for user space MLME");
2638                 return -1;
2639         }
2640
2641         ifindex = wpa_driver_prism2_param_get(drv, PRISM2_PARAM_MGMT_IF);
2642         if (ifindex <= 0) {
2643                 wpa_printf(MSG_ERROR, "WEXT: MLME management device not "
2644                            "found");
2645                 return -1;
2646         }
2647
2648         os_memset(&ifr, 0, sizeof(ifr));
2649         ifr.ifr_ifindex = ifindex;
2650         if (ioctl(drv->ioctl_sock, SIOCGIFNAME, &ifr) != 0) {
2651                 perror("ioctl(SIOCGIFNAME)");
2652                 return -1;
2653         }
2654         os_strlcpy(drv->mlmedev, ifr.ifr_name, sizeof(drv->mlmedev));
2655         wpa_printf(MSG_DEBUG, "WEXT: MLME management device '%s'",
2656                    drv->mlmedev);
2657
2658         if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev, &flags) != 0
2659             || wpa_driver_wext_set_ifflags_ifname(drv, drv->mlmedev,
2660                                                   flags | IFF_UP) != 0) {
2661                 wpa_printf(MSG_ERROR, "WEXT: Could not set interface "
2662                            "'%s' UP", drv->mlmedev);
2663                 return -1;
2664         }
2665
2666         s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2667         if (s < 0) {
2668                 perror("socket[PF_PACKET,SOCK_RAW]");
2669                 return -1;
2670         }
2671
2672         os_memset(&addr, 0, sizeof(addr));
2673         addr.sll_family = AF_PACKET;
2674         addr.sll_ifindex = ifindex;
2675
2676         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
2677                 perror("bind(MLME)");
2678                 return -1;
2679         }
2680
2681         if (eloop_register_read_sock(s, wpa_driver_wext_mlme_read, drv, NULL))
2682         {
2683                 wpa_printf(MSG_ERROR, "WEXT: Could not register MLME read "
2684                            "socket");
2685                 close(s);
2686                 return -1;
2687         }
2688
2689         return s;
2690 }
2691
2692
2693 static int wpa_driver_wext_send_mlme(void *priv, const u8 *data,
2694                                      size_t data_len)
2695 {
2696         struct wpa_driver_wext_data *drv = priv;
2697         int ret;
2698
2699         ret = send(drv->mlme_sock, data, data_len, 0);
2700         if (ret < 0) {
2701                 perror("send[MLME]");
2702                 return -1;
2703         }
2704
2705         return 0;
2706 }
2707
2708
2709 static int wpa_driver_wext_mlme_add_sta(void *priv, const u8 *addr,
2710                                         const u8 *supp_rates,
2711                                         size_t supp_rates_len)
2712 {
2713         struct wpa_driver_wext_data *drv = priv;
2714         struct prism2_hostapd_param param;
2715         size_t len;
2716
2717         os_memset(&param, 0, sizeof(param));
2718         param.cmd = PRISM2_HOSTAPD_ADD_STA;
2719         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2720         len = supp_rates_len;
2721         if (len > sizeof(param.u.add_sta.supp_rates))
2722                 len = sizeof(param.u.add_sta.supp_rates);
2723         os_memcpy(param.u.add_sta.supp_rates, supp_rates, len);
2724         return hostapd_ioctl(drv, &param, sizeof(param));
2725 }
2726
2727
2728 static int wpa_driver_wext_mlme_remove_sta(void *priv, const u8 *addr)
2729 {
2730         struct wpa_driver_wext_data *drv = priv;
2731         struct prism2_hostapd_param param;
2732
2733         os_memset(&param, 0, sizeof(param));
2734         param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
2735         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2736         return hostapd_ioctl(drv, &param, sizeof(param));
2737 }
2738
2739 #endif /* CONFIG_CLIENT_MLME */
2740
2741
2742 static int wpa_driver_wext_set_param(void *priv, const char *param)
2743 {
2744 #ifdef CONFIG_CLIENT_MLME
2745         struct wpa_driver_wext_data *drv = priv;
2746
2747         if (param == NULL)
2748                 return 0;
2749
2750         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2751
2752         if (os_strstr(param, "use_mlme=1")) {
2753                 wpa_printf(MSG_DEBUG, "WEXT: Using user space MLME");
2754                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2755
2756                 drv->mlme_sock = wpa_driver_wext_open_mlme(drv);
2757                 if (drv->mlme_sock < 0)
2758                         return -1;
2759         }
2760 #endif /* CONFIG_CLIENT_MLME */
2761
2762         return 0;
2763 }
2764
2765
2766 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2767 {
2768         return drv->we_version_compiled;
2769 }
2770
2771
2772 const struct wpa_driver_ops wpa_driver_wext_ops = {
2773         .name = "wext",
2774         .desc = "Linux wireless extensions (generic)",
2775         .get_bssid = wpa_driver_wext_get_bssid,
2776         .get_ssid = wpa_driver_wext_get_ssid,
2777         .set_wpa = wpa_driver_wext_set_wpa,
2778         .set_key = wpa_driver_wext_set_key,
2779         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2780         .set_drop_unencrypted = wpa_driver_wext_set_drop_unencrypted,
2781         .scan = wpa_driver_wext_scan,
2782         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2783         .deauthenticate = wpa_driver_wext_deauthenticate,
2784         .disassociate = wpa_driver_wext_disassociate,
2785         .associate = wpa_driver_wext_associate,
2786         .set_auth_alg = wpa_driver_wext_set_auth_alg,
2787         .init = wpa_driver_wext_init,
2788         .deinit = wpa_driver_wext_deinit,
2789         .set_param = wpa_driver_wext_set_param,
2790         .add_pmkid = wpa_driver_wext_add_pmkid,
2791         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2792         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2793         .get_capa = wpa_driver_wext_get_capa,
2794         .set_operstate = wpa_driver_wext_set_operstate,
2795 #ifdef CONFIG_CLIENT_MLME
2796         .get_hw_feature_data = wpa_driver_wext_get_hw_feature_data,
2797         .set_channel = wpa_driver_wext_set_channel,
2798         .set_ssid = wpa_driver_wext_set_ssid,
2799         .set_bssid = wpa_driver_wext_set_bssid,
2800         .send_mlme = wpa_driver_wext_send_mlme,
2801         .mlme_add_sta = wpa_driver_wext_mlme_add_sta,
2802         .mlme_remove_sta = wpa_driver_wext_mlme_remove_sta,
2803 #endif /* CONFIG_CLIENT_MLME */
2804 };