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                         wpa_driver_wext_event_wireless_michaelmicfailure(
 656                                 ctx, custom, iwe->u.data.length);
 657                         break;
 658                 case IWEVCUSTOM:
 659                         if (custom + iwe->u.data.length > end)
 660                                 return;
 661                         buf = os_malloc(iwe->u.data.length + 1);
 662                         if (buf == NULL)
 663                                 return;
 664                         os_memcpy(buf, custom, iwe->u.data.length);
 665                         buf[iwe->u.data.length] = '\0';
 666                         wpa_driver_wext_event_wireless_custom(ctx, buf);
 667                         os_free(buf);
 668                         break;
 669                 case SIOCGIWSCAN:
 670                         drv->scan_complete_events = 1;
 671                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 672                                              drv, ctx);
 673                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 674                         break;
 675                 case IWEVASSOCREQIE:
 676                         wpa_driver_wext_event_wireless_assocreqie(
 677                                 drv, custom, iwe->u.data.length);
 678                         break;
 679                 case IWEVASSOCRESPIE:
 680                         wpa_driver_wext_event_wireless_assocrespie(
 681                                 drv, custom, iwe->u.data.length);
 682                         break;
 683                 case IWEVPMKIDCAND:
 684                         wpa_driver_wext_event_wireless_pmkidcand(
 685                                 drv, custom, iwe->u.data.length);
 686                         break;
 687                 }
 688
 689                 pos += iwe->len;
 690         }
 691 }
 692
 693
 694 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 695                                        void *ctx, char *buf, size_t len,
 696                                        int del)
 697 {
 698         union wpa_event_data event;
 699
 700         os_memset(&event, 0, sizeof(event));
 701         if (len > sizeof(event.interface_status.ifname))
 702                 len = sizeof(event.interface_status.ifname) - 1;
 703         os_memcpy(event.interface_status.ifname, buf, len);
 704         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 705                 EVENT_INTERFACE_ADDED;
 706
 707         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 708                    del ? "DEL" : "NEW",
 709                    event.interface_status.ifname,
 710                    del ? "removed" : "added");
 711
 712         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 713                 if (del)
 714                         drv->if_removed = 1;
 715                 else
 716                         drv->if_removed = 0;
 717         }
 718
 719         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 720 }
 721
 722
 723 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 724                                       struct nlmsghdr *h)
 725 {
 726         struct ifinfomsg *ifi;
 727         int attrlen, nlmsg_len, rta_len;
 728         struct rtattr *attr;
 729
 730         ifi = NLMSG_DATA(h);
 731
 732         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 733
 734         attrlen = h->nlmsg_len - nlmsg_len;
 735         if (attrlen < 0)
 736                 return 0;
 737
 738         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 739
 740         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 741         while (RTA_OK(attr, attrlen)) {
 742                 if (attr->rta_type == IFLA_IFNAME) {
 743                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 744                             == 0)
 745                                 return 1;
 746                         else
 747                                 break;
 748                 }
 749                 attr = RTA_NEXT(attr, attrlen);
 750         }
 751
 752         return 0;
 753 }
 754
 755
 756 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 757                                        int ifindex, struct nlmsghdr *h)
 758 {
 759         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 760                 return 1;
 761
 762         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, h)) {
 763                 drv->ifindex = if_nametoindex(drv->ifname);
 764                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 765                            "interface");
 766                 wpa_driver_wext_finish_drv_init(drv);
 767                 return 1;
 768         }
 769
 770         return 0;
 771 }
 772
 773
 774 static void wpa_driver_wext_event_rtm_newlink(struct wpa_driver_wext_data *drv,
 775                                               void *ctx, struct nlmsghdr *h,
 776                                               size_t len)
 777 {
 778         struct ifinfomsg *ifi;
 779         int attrlen, nlmsg_len, rta_len;
 780         struct rtattr * attr;
 781
 782         if (len < sizeof(*ifi))
 783                 return;
 784
 785         ifi = NLMSG_DATA(h);
 786
 787         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, h)) {
 788                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 789                            ifi->ifi_index);
 790                 return;
 791         }
 792
 793         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 794                    "(%s%s%s%s)",
 795                    drv->operstate, ifi->ifi_flags,
 796                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 797                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 798                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 799                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 800         /*
 801          * Some drivers send the association event before the operup event--in
 802          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 803          * fails. This will hit us when wpa_supplicant does not need to do
 804          * IEEE 802.1X authentication
 805          */
 806         if (drv->operstate == 1 &&
 807             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 808             !(ifi->ifi_flags & IFF_RUNNING))
 809                 wpa_driver_wext_send_oper_ifla(drv, -1, IF_OPER_UP);
 810
 811         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 812
 813         attrlen = h->nlmsg_len - nlmsg_len;
 814         if (attrlen < 0)
 815                 return;
 816
 817         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 818
 819         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 820         while (RTA_OK(attr, attrlen)) {
 821                 if (attr->rta_type == IFLA_WIRELESS) {
 822                         wpa_driver_wext_event_wireless(
 823                                 drv, ctx, ((char *) attr) + rta_len,
 824                                 attr->rta_len - rta_len);
 825                 } else if (attr->rta_type == IFLA_IFNAME) {
 826                         wpa_driver_wext_event_link(drv, ctx,
 827                                                    ((char *) attr) + rta_len,
 828                                                    attr->rta_len - rta_len, 0);
 829                 }
 830                 attr = RTA_NEXT(attr, attrlen);
 831         }
 832 }
 833
 834
 835 static void wpa_driver_wext_event_rtm_dellink(struct wpa_driver_wext_data *drv,
 836                                               void *ctx, struct nlmsghdr *h,
 837                                               size_t len)
 838 {
 839         struct ifinfomsg *ifi;
 840         int attrlen, nlmsg_len, rta_len;
 841         struct rtattr * attr;
 842
 843         if (len < sizeof(*ifi))
 844                 return;
 845
 846         ifi = NLMSG_DATA(h);
 847
 848         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 849
 850         attrlen = h->nlmsg_len - nlmsg_len;
 851         if (attrlen < 0)
 852                 return;
 853
 854         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 855
 856         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 857         while (RTA_OK(attr, attrlen)) {
 858                 if (attr->rta_type == IFLA_IFNAME) {
 859                         wpa_driver_wext_event_link(drv,  ctx,
 860                                                    ((char *) attr) + rta_len,
 861                                                    attr->rta_len - rta_len, 1);
 862                 }
 863                 attr = RTA_NEXT(attr, attrlen);
 864         }
 865 }
 866
 867
 868 static void wpa_driver_wext_event_receive(int sock, void *eloop_ctx,
 869                                           void *sock_ctx)
 870 {
 871         char buf[8192];
 872         int left;
 873         struct sockaddr_nl from;
 874         socklen_t fromlen;
 875         struct nlmsghdr *h;
 876         int max_events = 10;
 877
 878 try_again:
 879         fromlen = sizeof(from);
 880         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 881                         (struct sockaddr *) &from, &fromlen);
 882         if (left < 0) {
 883                 if (errno != EINTR && errno != EAGAIN)
 884                         perror("recvfrom(netlink)");
 885                 return;
 886         }
 887
 888         h = (struct nlmsghdr *) buf;
 889         while (left >= (int) sizeof(*h)) {
 890                 int len, plen;
 891
 892                 len = h->nlmsg_len;
 893                 plen = len - sizeof(*h);
 894                 if (len > left || plen < 0) {
 895                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 896                                    "len=%d left=%d plen=%d",
 897                                    len, left, plen);
 898                         break;
 899                 }
 900
 901                 switch (h->nlmsg_type) {
 902                 case RTM_NEWLINK:
 903                         wpa_driver_wext_event_rtm_newlink(eloop_ctx, sock_ctx,
 904                                                           h, plen);
 905                         break;
 906                 case RTM_DELLINK:
 907                         wpa_driver_wext_event_rtm_dellink(eloop_ctx, sock_ctx,
 908                                                           h, plen);
 909                         break;
 910                 }
 911
 912                 len = NLMSG_ALIGN(len);
 913                 left -= len;
 914                 h = (struct nlmsghdr *) ((char *) h + len);
 915         }
 916
 917         if (left > 0) {
 918                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 919                            "message", left);
 920         }
 921
 922         if (--max_events > 0) {
 923                 /*
 924                  * Try to receive all events in one eloop call in order to
 925                  * limit race condition on cases where AssocInfo event, Assoc
 926                  * event, and EAPOL frames are received more or less at the
 927                  * same time. We want to process the event messages first
 928                  * before starting EAPOL processing.
 929                  */
 930                 goto try_again;
 931         }
 932 }
 933
 934
 935 static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
 936                                               const char *ifname, int *flags)
 937 {
 938         struct ifreq ifr;
 939
 940         os_memset(&ifr, 0, sizeof(ifr));
 941         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 942         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 943                 perror("ioctl[SIOCGIFFLAGS]");
 944                 return -1;
 945         }
 946         *flags = ifr.ifr_flags & 0xffff;
 947         return 0;
 948 }
 949
 950
 951 /**
 952  * wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 953  * @drv: driver_wext private data
 954  * @flags: Pointer to returned flags value
 955  * Returns: 0 on success, -1 on failure
 956  */
 957 int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
 958 {
 959         return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
 960 }
 961
 962
 963 static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
 964                                               const char *ifname, int flags)
 965 {
 966         struct ifreq ifr;
 967
 968         os_memset(&ifr, 0, sizeof(ifr));
 969         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 970         ifr.ifr_flags = flags & 0xffff;
 971         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 972                 perror("SIOCSIFFLAGS");
 973                 return -1;
 974         }
 975         return 0;
 976 }
 977
 978
 979 #ifdef CONFIG_CLIENT_MLME
 980
 981 static int wpa_driver_prism2_param_set(struct wpa_driver_wext_data *drv,
 982                                        int param, int value)
 983 {
 984         struct iwreq iwr;
 985         int *i;
 986
 987         os_memset(&iwr, 0, sizeof(iwr));
 988         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 989         i = (int *) iwr.u.name;
 990         *i++ = param;
 991         *i++ = value;
 992
 993         return ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr);
 994 }
 995
 996
 997 static int wpa_driver_prism2_param_get(struct wpa_driver_wext_data *drv,
 998                                        int param)
 999 {
1000         struct iwreq iwr;
1001         int *i;
1002
1003         os_memset(&iwr, 0, sizeof(iwr));
1004         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1005         i = (int *) iwr.u.name;
1006         *i = param;
1007
1008         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_GET_PRISM2_PARAM, &iwr) < 0) {
1009                 perror("ioctl[PRISM2_IOCTL_GET_PRISM2_PARAM]");
1010                 return -1;
1011         }
1012
1013         return *i;
1014 }
1015
1016 #endif /* CONFIG_CLIENT_MLME */
1017
1018
1019 /**
1020  * wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
1021  * @drv: driver_wext private data
1022  * @flags: New value for flags
1023  * Returns: 0 on success, -1 on failure
1024  */
1025 int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
1026 {
1027         return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
1028 }
1029
1030
1031 /**
1032  * wpa_driver_wext_init - Initialize WE driver interface
1033  * @ctx: context to be used when calling wpa_supplicant functions,
1034  * e.g., wpa_supplicant_event()
1035  * @ifname: interface name, e.g., wlan0
1036  * Returns: Pointer to private data, %NULL on failure
1037  */
1038 void * wpa_driver_wext_init(void *ctx, const char *ifname)
1039 {
1040         int s;
1041         struct sockaddr_nl local;
1042         struct wpa_driver_wext_data *drv;
1043
1044         drv = os_zalloc(sizeof(*drv));
1045         if (drv == NULL)
1046                 return NULL;
1047         drv->ctx = ctx;
1048         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1049
1050         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1051         if (drv->ioctl_sock < 0) {
1052                 perror("socket(PF_INET,SOCK_DGRAM)");
1053                 os_free(drv);
1054                 return NULL;
1055         }
1056
1057         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1058         if (s < 0) {
1059                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1060                 close(drv->ioctl_sock);
1061                 os_free(drv);
1062                 return NULL;
1063         }
1064
1065         os_memset(&local, 0, sizeof(local));
1066         local.nl_family = AF_NETLINK;
1067         local.nl_groups = RTMGRP_LINK;
1068         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1069                 perror("bind(netlink)");
1070                 close(s);
1071                 close(drv->ioctl_sock);
1072                 os_free(drv);
1073                 return NULL;
1074         }
1075
1076         eloop_register_read_sock(s, wpa_driver_wext_event_receive, drv, ctx);
1077         drv->event_sock = s;
1078
1079         drv->mlme_sock = -1;
1080
1081         wpa_driver_wext_finish_drv_init(drv);
1082
1083         return drv;
1084 }
1085
1086
1087 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
1088 {
1089         int flags;
1090
1091         if (wpa_driver_wext_get_ifflags(drv, &flags) != 0)
1092                 printf("Could not get interface '%s' flags\n", drv->ifname);
1093         else if (!(flags & IFF_UP)) {
1094                 if (wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
1095                         printf("Could not set interface '%s' UP\n",
1096                                drv->ifname);
1097                 } else {
1098                         /*
1099                          * Wait some time to allow driver to initialize before
1100                          * starting configuring the driver. This seems to be
1101                          * needed at least some drivers that load firmware etc.
1102                          * when the interface is set up.
1103                          */
1104                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
1105                                    "a second for the driver to complete "
1106                                    "initialization", drv->ifname);
1107                         sleep(1);
1108                 }
1109         }
1110
1111         /*
1112          * Make sure that the driver does not have any obsolete PMKID entries.
1113          */
1114         wpa_driver_wext_flush_pmkid(drv);
1115
1116         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
1117                 printf("Could not configure driver to use managed mode\n");
1118         }
1119
1120         wpa_driver_wext_get_range(drv);
1121
1122         drv->ifindex = if_nametoindex(drv->ifname);
1123
1124         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
1125                 /*
1126                  * Host AP driver may use both wlan# and wifi# interface in
1127                  * wireless events. Since some of the versions included WE-18
1128                  * support, let's add the alternative ifindex also from
1129                  * driver_wext.c for the time being. This may be removed at
1130                  * some point once it is believed that old versions of the
1131                  * driver are not in use anymore.
1132                  */
1133                 char ifname2[IFNAMSIZ + 1];
1134                 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
1135                 os_memcpy(ifname2, "wifi", 4);
1136                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
1137         }
1138
1139         wpa_driver_wext_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1140 }
1141
1142
1143 /**
1144  * wpa_driver_wext_deinit - Deinitialize WE driver interface
1145  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1146  *
1147  * Shut down driver interface and processing of driver events. Free
1148  * private data buffer if one was allocated in wpa_driver_wext_init().
1149  */
1150 void wpa_driver_wext_deinit(void *priv)
1151 {
1152         struct wpa_driver_wext_data *drv = priv;
1153         int flags;
1154
1155         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1156
1157         /*
1158          * Clear possibly configured driver parameters in order to make it
1159          * easier to use the driver after wpa_supplicant has been terminated.
1160          */
1161         (void) wpa_driver_wext_set_bssid(drv,
1162                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1163
1164         wpa_driver_wext_send_oper_ifla(priv, 0, IF_OPER_UP);
1165
1166         eloop_unregister_read_sock(drv->event_sock);
1167         if (drv->mlme_sock >= 0)
1168                 eloop_unregister_read_sock(drv->mlme_sock);
1169
1170         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
1171                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
1172
1173 #ifdef CONFIG_CLIENT_MLME
1174         if (drv->mlmedev[0]) {
1175                 if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev,
1176                                                        &flags) == 0)
1177                         (void) wpa_driver_wext_set_ifflags_ifname(
1178                                 drv, drv->mlmedev, flags & ~IFF_UP);
1179                 wpa_driver_prism2_param_set(drv, PRISM2_PARAM_MGMT_IF, 0);
1180                 wpa_driver_prism2_param_set(drv, PRISM2_PARAM_USER_SPACE_MLME,
1181                                             0);
1182         }
1183 #endif /* CONFIG_CLIENT_MLME */
1184
1185         close(drv->event_sock);
1186         close(drv->ioctl_sock);
1187         if (drv->mlme_sock >= 0)
1188                 close(drv->mlme_sock);
1189         os_free(drv->assoc_req_ies);
1190         os_free(drv->assoc_resp_ies);
1191         os_free(drv);
1192 }
1193
1194
1195 /**
1196  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1197  * @eloop_ctx: Unused
1198  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1199  *
1200  * This function can be used as registered timeout when starting a scan to
1201  * generate a scan completed event if the driver does not report this.
1202  */
1203 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1204 {
1205         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1206         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1207 }
1208
1209
1210 /**
1211  * wpa_driver_wext_scan - Request the driver to initiate scan
1212  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1213  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1214  *      all SSIDs (either active scan with broadcast SSID or passive
1215  *      scan
1216  * @ssid_len: Length of the SSID
1217  * Returns: 0 on success, -1 on failure
1218  */
1219 int wpa_driver_wext_scan(void *priv, const u8 *ssid, size_t ssid_len)
1220 {
1221         struct wpa_driver_wext_data *drv = priv;
1222         struct iwreq iwr;
1223         int ret = 0, timeout;
1224         struct iw_scan_req req;
1225
1226         if (ssid_len > IW_ESSID_MAX_SIZE) {
1227                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1228                            __FUNCTION__, (unsigned long) ssid_len);
1229                 return -1;
1230         }
1231
1232         os_memset(&iwr, 0, sizeof(iwr));
1233         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1234
1235         if (ssid && ssid_len) {
1236                 os_memset(&req, 0, sizeof(req));
1237                 req.essid_len = ssid_len;
1238                 req.bssid.sa_family = ARPHRD_ETHER;
1239                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1240                 os_memcpy(req.essid, ssid, ssid_len);
1241                 iwr.u.data.pointer = (caddr_t) &req;
1242                 iwr.u.data.length = sizeof(req);
1243                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1244         }
1245
1246         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1247                 perror("ioctl[SIOCSIWSCAN]");
1248                 ret = -1;
1249         }
1250
1251         /* Not all drivers generate "scan completed" wireless event, so try to
1252          * read results after a timeout. */
1253         timeout = 5;
1254         if (drv->scan_complete_events) {
1255                 /*
1256                  * The driver seems to deliver SIOCGIWSCAN events to notify
1257                  * when scan is complete, so use longer timeout to avoid race
1258                  * conditions with scanning and following association request.
1259                  */
1260                 timeout = 30;
1261         }
1262         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1263                    "seconds", ret, timeout);
1264         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1265         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1266                                drv->ctx);
1267
1268         return ret;
1269 }
1270
1271
1272 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1273                                     size_t *len)
1274 {
1275         struct iwreq iwr;
1276         u8 *res_buf;
1277         size_t res_buf_len;
1278
1279         res_buf_len = IW_SCAN_MAX_DATA;
1280         for (;;) {
1281                 res_buf = os_malloc(res_buf_len);
1282                 if (res_buf == NULL)
1283                         return NULL;
1284                 os_memset(&iwr, 0, sizeof(iwr));
1285                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1286                 iwr.u.data.pointer = res_buf;
1287                 iwr.u.data.length = res_buf_len;
1288
1289                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1290                         break;
1291
1292                 if (errno == E2BIG && res_buf_len < 100000) {
1293                         os_free(res_buf);
1294                         res_buf = NULL;
1295                         res_buf_len *= 2;
1296                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1297                                    "trying larger buffer (%lu bytes)",
1298                                    (unsigned long) res_buf_len);
1299                 } else {
1300                         perror("ioctl[SIOCGIWSCAN]");
1301                         os_free(res_buf);
1302                         return NULL;
1303                 }
1304         }
1305
1306         if (iwr.u.data.length > res_buf_len) {
1307                 os_free(res_buf);
1308                 return NULL;
1309         }
1310         *len = iwr.u.data.length;
1311
1312         return res_buf;
1313 }
1314
1315
1316 /*
1317  * Data structure for collecting WEXT scan results. This is needed to allow
1318  * the various methods of reporting IEs to be combined into a single IE buffer.
1319  */
1320 struct wext_scan_data {
1321         struct wpa_scan_res res;
1322         u8 *ie;
1323         size_t ie_len;
1324         u8 ssid[32];
1325         size_t ssid_len;
1326         int maxrate;
1327 };
1328
1329
1330 static void wext_get_scan_mode(struct iw_event *iwe,
1331                                struct wext_scan_data *res)
1332 {
1333         if (iwe->u.mode == IW_MODE_ADHOC)
1334                 res->res.caps |= IEEE80211_CAP_IBSS;
1335         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1336                 res->res.caps |= IEEE80211_CAP_ESS;
1337 }
1338
1339
1340 static void wext_get_scan_ssid(struct iw_event *iwe,
1341                                struct wext_scan_data *res, char *custom,
1342                                char *end)
1343 {
1344         int ssid_len = iwe->u.essid.length;
1345         if (custom + ssid_len > end)
1346                 return;
1347         if (iwe->u.essid.flags &&
1348             ssid_len > 0 &&
1349             ssid_len <= IW_ESSID_MAX_SIZE) {
1350                 os_memcpy(res->ssid, custom, ssid_len);
1351                 res->ssid_len = ssid_len;
1352         }
1353 }
1354
1355
1356 static void wext_get_scan_freq(struct iw_event *iwe,
1357                                struct wext_scan_data *res)
1358 {
1359         int divi = 1000000, i;
1360
1361         if (iwe->u.freq.e == 0) {
1362                 /*
1363                  * Some drivers do not report frequency, but a channel.
1364                  * Try to map this to frequency by assuming they are using
1365                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1366                  * frequency if the driver sends both frequency and channel,
1367                  * since the driver may be sending an A-band channel that we
1368                  * don't handle here.
1369                  */
1370
1371                 if (res->res.freq)
1372                         return;
1373
1374                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1375                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1376                         return;
1377                 } else if (iwe->u.freq.m == 14) {
1378                         res->res.freq = 2484;
1379                         return;
1380                 }
1381         }
1382
1383         if (iwe->u.freq.e > 6) {
1384                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1385                            MACSTR " m=%d e=%d)",
1386                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1387                            iwe->u.freq.e);
1388                 return;
1389         }
1390
1391         for (i = 0; i < iwe->u.freq.e; i++)
1392                 divi /= 10;
1393         res->res.freq = iwe->u.freq.m / divi;
1394 }
1395
1396
1397 static void wext_get_scan_qual(struct iw_event *iwe,
1398                                struct wext_scan_data *res)
1399 {
1400         res->res.qual = iwe->u.qual.qual;
1401         res->res.noise = iwe->u.qual.noise;
1402         res->res.level = iwe->u.qual.level;
1403 }
1404
1405
1406 static void wext_get_scan_encode(struct iw_event *iwe,
1407                                  struct wext_scan_data *res)
1408 {
1409         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1410                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1411 }
1412
1413
1414 static void wext_get_scan_rate(struct iw_event *iwe,
1415                                struct wext_scan_data *res, char *pos,
1416                                char *end)
1417 {
1418         int maxrate;
1419         char *custom = pos + IW_EV_LCP_LEN;
1420         struct iw_param p;
1421         size_t clen;
1422
1423         clen = iwe->len;
1424         if (custom + clen > end)
1425                 return;
1426         maxrate = 0;
1427         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1428                 /* Note: may be misaligned, make a local, aligned copy */
1429                 os_memcpy(&p, custom, sizeof(struct iw_param));
1430                 if (p.value > maxrate)
1431                         maxrate = p.value;
1432                 clen -= sizeof(struct iw_param);
1433                 custom += sizeof(struct iw_param);
1434         }
1435
1436         /* Convert the maxrate from WE-style (b/s units) to
1437          * 802.11 rates (500000 b/s units).
1438          */
1439         res->maxrate = maxrate / 500000;
1440 }
1441
1442
1443 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1444                                     struct wext_scan_data *res, char *custom,
1445                                     char *end)
1446 {
1447         char *genie, *gpos, *gend;
1448         u8 *tmp;
1449
1450         gpos = genie = custom;
1451         gend = genie + iwe->u.data.length;
1452         if (gend > end) {
1453                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1454                 return;
1455         }
1456
1457         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1458         if (tmp == NULL)
1459                 return;
1460         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1461         res->ie = tmp;
1462         res->ie_len += gend - gpos;
1463 }
1464
1465
1466 static void wext_get_scan_custom(struct iw_event *iwe,
1467                                  struct wext_scan_data *res, char *custom,
1468                                  char *end)
1469 {
1470         size_t clen;
1471         u8 *tmp;
1472
1473         clen = iwe->u.data.length;
1474         if (custom + clen > end)
1475                 return;
1476
1477         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1478                 char *spos;
1479                 int bytes;
1480                 spos = custom + 7;
1481                 bytes = custom + clen - spos;
1482                 if (bytes & 1)
1483                         return;
1484                 bytes /= 2;
1485                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1486                 if (tmp == NULL)
1487                         return;
1488                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1489                 res->ie = tmp;
1490                 res->ie_len += bytes;
1491         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1492                 char *spos;
1493                 int bytes;
1494                 spos = custom + 7;
1495                 bytes = custom + clen - spos;
1496                 if (bytes & 1)
1497                         return;
1498                 bytes /= 2;
1499                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1500                 if (tmp == NULL)
1501                         return;
1502                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1503                 res->ie = tmp;
1504                 res->ie_len += bytes;
1505         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1506                 char *spos;
1507                 int bytes;
1508                 u8 bin[8];
1509                 spos = custom + 4;
1510                 bytes = custom + clen - spos;
1511                 if (bytes != 16) {
1512                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1513                         return;
1514                 }
1515                 bytes /= 2;
1516                 hexstr2bin(spos, bin, bytes);
1517                 res->res.tsf += WPA_GET_BE64(bin);
1518         }
1519 }
1520
1521
1522 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1523 {
1524         return drv->we_version_compiled > 18 &&
1525                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1526                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1527 }
1528
1529
1530 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1531                                            struct wext_scan_data *data)
1532 {
1533         struct wpa_scan_res **tmp;
1534         struct wpa_scan_res *r;
1535         size_t extra_len;
1536         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1537
1538         /* Figure out whether we need to fake any IEs */
1539         pos = data->ie;
1540         end = pos + data->ie_len;
1541         while (pos && pos + 1 < end) {
1542                 if (pos + 2 + pos[1] > end)
1543                         break;
1544                 if (pos[0] == WLAN_EID_SSID)
1545                         ssid_ie = pos;
1546                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1547                         rate_ie = pos;
1548                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1549                         rate_ie = pos;
1550                 pos += 2 + pos[1];
1551         }
1552
1553         extra_len = 0;
1554         if (ssid_ie == NULL)
1555                 extra_len += 2 + data->ssid_len;
1556         if (rate_ie == NULL && data->maxrate)
1557                 extra_len += 3;
1558
1559         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1560         if (r == NULL)
1561                 return;
1562         os_memcpy(r, &data->res, sizeof(*r));
1563         r->ie_len = extra_len + data->ie_len;
1564         pos = (u8 *) (r + 1);
1565         if (ssid_ie == NULL) {
1566                 /*
1567                  * Generate a fake SSID IE since the driver did not report
1568                  * a full IE list.
1569                  */
1570                 *pos++ = WLAN_EID_SSID;
1571                 *pos++ = data->ssid_len;
1572                 os_memcpy(pos, data->ssid, data->ssid_len);
1573                 pos += data->ssid_len;
1574         }
1575         if (rate_ie == NULL && data->maxrate) {
1576                 /*
1577                  * Generate a fake Supported Rates IE since the driver did not
1578                  * report a full IE list.
1579                  */
1580                 *pos++ = WLAN_EID_SUPP_RATES;
1581                 *pos++ = 1;
1582                 *pos++ = data->maxrate;
1583         }
1584         if (data->ie)
1585                 os_memcpy(pos, data->ie, data->ie_len);
1586
1587         tmp = os_realloc(res->res,
1588                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1589         if (tmp == NULL) {
1590                 os_free(r);
1591                 return;
1592         }
1593         tmp[res->num++] = r;
1594         res->res = tmp;
1595 }
1596
1597
1598 /**
1599  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1600  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1601  * Returns: Scan results on success, -1 on failure
1602  */
1603 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1604 {
1605         struct wpa_driver_wext_data *drv = priv;
1606         size_t ap_num = 0, len;
1607         int first;
1608         u8 *res_buf;
1609         struct iw_event iwe_buf, *iwe = &iwe_buf;
1610         char *pos, *end, *custom;
1611         struct wpa_scan_results *res;
1612         struct wext_scan_data data;
1613
1614         res_buf = wpa_driver_wext_giwscan(drv, &len);
1615         if (res_buf == NULL)
1616                 return NULL;
1617
1618         ap_num = 0;
1619         first = 1;
1620
1621         res = os_zalloc(sizeof(*res));
1622         if (res == NULL) {
1623                 os_free(res_buf);
1624                 return NULL;
1625         }
1626
1627         pos = (char *) res_buf;
1628         end = (char *) res_buf + len;
1629         os_memset(&data, 0, sizeof(data));
1630
1631         while (pos + IW_EV_LCP_LEN <= end) {
1632                 /* Event data may be unaligned, so make a local, aligned copy
1633                  * before processing. */
1634                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1635                 if (iwe->len <= IW_EV_LCP_LEN)
1636                         break;
1637
1638                 custom = pos + IW_EV_POINT_LEN;
1639                 if (wext_19_iw_point(drv, iwe->cmd)) {
1640                         /* WE-19 removed the pointer from struct iw_point */
1641                         char *dpos = (char *) &iwe_buf.u.data.length;
1642                         int dlen = dpos - (char *) &iwe_buf;
1643                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1644                                   sizeof(struct iw_event) - dlen);
1645                 } else {
1646                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1647                         custom += IW_EV_POINT_OFF;
1648                 }
1649
1650                 switch (iwe->cmd) {
1651                 case SIOCGIWAP:
1652                         if (!first)
1653                                 wpa_driver_wext_add_scan_entry(res, &data);
1654                         first = 0;
1655                         os_free(data.ie);
1656                         os_memset(&data, 0, sizeof(data));
1657                         os_memcpy(data.res.bssid,
1658                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1659                         break;
1660                 case SIOCGIWMODE:
1661                         wext_get_scan_mode(iwe, &data);
1662                         break;
1663                 case SIOCGIWESSID:
1664                         wext_get_scan_ssid(iwe, &data, custom, end);
1665                         break;
1666                 case SIOCGIWFREQ:
1667                         wext_get_scan_freq(iwe, &data);
1668                         break;
1669                 case IWEVQUAL:
1670                         wext_get_scan_qual(iwe, &data);
1671                         break;
1672                 case SIOCGIWENCODE:
1673                         wext_get_scan_encode(iwe, &data);
1674                         break;
1675                 case SIOCGIWRATE:
1676                         wext_get_scan_rate(iwe, &data, pos, end);
1677                         break;
1678                 case IWEVGENIE:
1679                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1680                         break;
1681                 case IWEVCUSTOM:
1682                         wext_get_scan_custom(iwe, &data, custom, end);
1683                         break;
1684                 }
1685
1686                 pos += iwe->len;
1687         }
1688         os_free(res_buf);
1689         res_buf = NULL;
1690         if (!first)
1691                 wpa_driver_wext_add_scan_entry(res, &data);
1692         os_free(data.ie);
1693
1694         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1695                    (unsigned long) len, (unsigned long) res->num);
1696
1697         return res;
1698 }
1699
1700
1701 static int wpa_driver_wext_get_range(void *priv)
1702 {
1703         struct wpa_driver_wext_data *drv = priv;
1704         struct iw_range *range;
1705         struct iwreq iwr;
1706         int minlen;
1707         size_t buflen;
1708
1709         /*
1710          * Use larger buffer than struct iw_range in order to allow the
1711          * structure to grow in the future.
1712          */
1713         buflen = sizeof(struct iw_range) + 500;
1714         range = os_zalloc(buflen);
1715         if (range == NULL)
1716                 return -1;
1717
1718         os_memset(&iwr, 0, sizeof(iwr));
1719         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1720         iwr.u.data.pointer = (caddr_t) range;
1721         iwr.u.data.length = buflen;
1722
1723         minlen = ((char *) &range->enc_capa) - (char *) range +
1724                 sizeof(range->enc_capa);
1725
1726         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1727                 perror("ioctl[SIOCGIWRANGE]");
1728                 os_free(range);
1729                 return -1;
1730         } else if (iwr.u.data.length >= minlen &&
1731                    range->we_version_compiled >= 18) {
1732                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1733                            "WE(source)=%d enc_capa=0x%x",
1734                            range->we_version_compiled,
1735                            range->we_version_source,
1736                            range->enc_capa);
1737                 drv->has_capability = 1;
1738                 drv->we_version_compiled = range->we_version_compiled;
1739                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1740                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1741                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1742                 }
1743                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1744                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1745                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1746                 }
1747                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1748                         WPA_DRIVER_CAPA_ENC_WEP104;
1749                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1750                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1751                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1752                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1753                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1754                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1755
1756                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1757                            "flags 0x%x",
1758                            drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1759         } else {
1760                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1761                            "assuming WPA is not supported");
1762         }
1763
1764         os_free(range);
1765         return 0;
1766 }
1767
1768
1769 static int wpa_driver_wext_set_wpa(void *priv, int enabled)
1770 {
1771         struct wpa_driver_wext_data *drv = priv;
1772         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1773
1774         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1775                                               enabled);
1776 }
1777
1778
1779 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1780                                    const u8 *psk)
1781 {
1782         struct iw_encode_ext *ext;
1783         struct iwreq iwr;
1784         int ret;
1785
1786         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1787
1788         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1789                 return 0;
1790
1791         if (!psk)
1792                 return 0;
1793
1794         os_memset(&iwr, 0, sizeof(iwr));
1795         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1796
1797         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1798         if (ext == NULL)
1799                 return -1;
1800
1801         iwr.u.encoding.pointer = (caddr_t) ext;
1802         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1803         ext->key_len = PMK_LEN;
1804         os_memcpy(&ext->key, psk, ext->key_len);
1805         ext->alg = IW_ENCODE_ALG_PMK;
1806
1807         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1808         if (ret < 0)
1809                 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1810         os_free(ext);
1811
1812         return ret;
1813 }
1814
1815
1816 static int wpa_driver_wext_set_key_ext(void *priv, wpa_alg alg,
1817                                        const u8 *addr, int key_idx,
1818                                        int set_tx, const u8 *seq,
1819                                        size_t seq_len,
1820                                        const u8 *key, size_t key_len)
1821 {
1822         struct wpa_driver_wext_data *drv = priv;
1823         struct iwreq iwr;
1824         int ret = 0;
1825         struct iw_encode_ext *ext;
1826
1827         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1828                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1829                            __FUNCTION__, (unsigned long) seq_len);
1830                 return -1;
1831         }
1832
1833         ext = os_zalloc(sizeof(*ext) + key_len);
1834         if (ext == NULL)
1835                 return -1;
1836         os_memset(&iwr, 0, sizeof(iwr));
1837         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1838         iwr.u.encoding.flags = key_idx + 1;
1839         if (alg == WPA_ALG_NONE)
1840                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1841         iwr.u.encoding.pointer = (caddr_t) ext;
1842         iwr.u.encoding.length = sizeof(*ext) + key_len;
1843
1844         if (addr == NULL ||
1845             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1846                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1847         if (set_tx)
1848                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1849
1850         ext->addr.sa_family = ARPHRD_ETHER;
1851         if (addr)
1852                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1853         else
1854                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1855         if (key && key_len) {
1856                 os_memcpy(ext + 1, key, key_len);
1857                 ext->key_len = key_len;
1858         }
1859         switch (alg) {
1860         case WPA_ALG_NONE:
1861                 ext->alg = IW_ENCODE_ALG_NONE;
1862                 break;
1863         case WPA_ALG_WEP:
1864                 ext->alg = IW_ENCODE_ALG_WEP;
1865                 break;
1866         case WPA_ALG_TKIP:
1867                 ext->alg = IW_ENCODE_ALG_TKIP;
1868                 break;
1869         case WPA_ALG_CCMP:
1870                 ext->alg = IW_ENCODE_ALG_CCMP;
1871                 break;
1872         case WPA_ALG_PMK:
1873                 ext->alg = IW_ENCODE_ALG_PMK;
1874                 break;
1875 #ifdef WEXT_MFP_PENDING
1876 #ifdef CONFIG_IEEE80211W
1877         case WPA_ALG_IGTK:
1878                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1879                 break;
1880 #endif /* CONFIG_IEEE80211W */
1881 #endif /* WEXT_MFP_PENDING */
1882         default:
1883                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1884                            __FUNCTION__, alg);
1885                 os_free(ext);
1886                 return -1;
1887         }
1888
1889         if (seq && seq_len) {
1890                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1891                 os_memcpy(ext->rx_seq, seq, seq_len);
1892         }
1893
1894         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1895                 ret = errno == EOPNOTSUPP ? -2 : -1;
1896                 if (errno == ENODEV) {
1897                         /*
1898                          * ndiswrapper seems to be returning incorrect error
1899                          * code.. */
1900                         ret = -2;
1901                 }
1902
1903                 perror("ioctl[SIOCSIWENCODEEXT]");
1904         }
1905
1906         os_free(ext);
1907         return ret;
1908 }
1909
1910
1911 /**
1912  * wpa_driver_wext_set_key - Configure encryption key
1913  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1914  * @priv: Private driver interface data
1915  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1916  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1917  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1918  *      broadcast/default keys
1919  * @key_idx: key index (0..3), usually 0 for unicast keys
1920  * @set_tx: Configure this key as the default Tx key (only used when
1921  *      driver does not support separate unicast/individual key
1922  * @seq: Sequence number/packet number, seq_len octets, the next
1923  *      packet number to be used for in replay protection; configured
1924  *      for Rx keys (in most cases, this is only used with broadcast
1925  *      keys and set to zero for unicast keys)
1926  * @seq_len: Length of the seq, depends on the algorithm:
1927  *      TKIP: 6 octets, CCMP: 6 octets
1928  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1929  *      8-byte Rx Mic Key
1930  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1931  *      TKIP: 32, CCMP: 16)
1932  * Returns: 0 on success, -1 on failure
1933  *
1934  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1935  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1936  */
1937 int wpa_driver_wext_set_key(void *priv, wpa_alg alg,
1938                             const u8 *addr, int key_idx,
1939                             int set_tx, const u8 *seq, size_t seq_len,
1940                             const u8 *key, size_t key_len)
1941 {
1942         struct wpa_driver_wext_data *drv = priv;
1943         struct iwreq iwr;
1944         int ret = 0;
1945
1946         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1947                    "key_len=%lu",
1948                    __FUNCTION__, alg, key_idx, set_tx,
1949                    (unsigned long) seq_len, (unsigned long) key_len);
1950
1951         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1952                                           seq, seq_len, key, key_len);
1953         if (ret == 0)
1954                 return 0;
1955
1956         if (ret == -2 &&
1957             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1958                 wpa_printf(MSG_DEBUG, "Driver did not support "
1959                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1960                 ret = 0;
1961         } else {
1962                 wpa_printf(MSG_DEBUG, "Driver did not support "
1963                            "SIOCSIWENCODEEXT");
1964                 return ret;
1965         }
1966
1967         os_memset(&iwr, 0, sizeof(iwr));
1968         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1969         iwr.u.encoding.flags = key_idx + 1;
1970         if (alg == WPA_ALG_NONE)
1971                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1972         iwr.u.encoding.pointer = (caddr_t) key;
1973         iwr.u.encoding.length = key_len;
1974
1975         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1976                 perror("ioctl[SIOCSIWENCODE]");
1977                 ret = -1;
1978         }
1979
1980         if (set_tx && alg != WPA_ALG_NONE) {
1981                 os_memset(&iwr, 0, sizeof(iwr));
1982                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1983                 iwr.u.encoding.flags = key_idx + 1;
1984                 iwr.u.encoding.pointer = (caddr_t) NULL;
1985                 iwr.u.encoding.length = 0;
1986                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1987                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1988                         ret = -1;
1989                 }
1990         }
1991
1992         return ret;
1993 }
1994
1995
1996 static int wpa_driver_wext_set_countermeasures(void *priv,
1997                                                int enabled)
1998 {
1999         struct wpa_driver_wext_data *drv = priv;
2000         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2001         return wpa_driver_wext_set_auth_param(drv,
2002                                               IW_AUTH_TKIP_COUNTERMEASURES,
2003                                               enabled);
2004 }
2005
2006
2007 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
2008                                                 int enabled)
2009 {
2010         struct wpa_driver_wext_data *drv = priv;
2011         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2012         drv->use_crypt = enabled;
2013         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2014                                               enabled);
2015 }
2016
2017
2018 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
2019                                 const u8 *addr, int cmd, int reason_code)
2020 {
2021         struct iwreq iwr;
2022         struct iw_mlme mlme;
2023         int ret = 0;
2024
2025         os_memset(&iwr, 0, sizeof(iwr));
2026         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2027         os_memset(&mlme, 0, sizeof(mlme));
2028         mlme.cmd = cmd;
2029         mlme.reason_code = reason_code;
2030         mlme.addr.sa_family = ARPHRD_ETHER;
2031         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
2032         iwr.u.data.pointer = (caddr_t) &mlme;
2033         iwr.u.data.length = sizeof(mlme);
2034
2035         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
2036                 perror("ioctl[SIOCSIWMLME]");
2037                 ret = -1;
2038         }
2039
2040         return ret;
2041 }
2042
2043
2044 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
2045                                           int reason_code)
2046 {
2047         struct wpa_driver_wext_data *drv = priv;
2048         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2049         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2050 }
2051
2052
2053 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
2054                                         int reason_code)
2055 {
2056         struct wpa_driver_wext_data *drv = priv;
2057         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2058         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC,
2059                                     reason_code);
2060 }
2061
2062
2063 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
2064                                       size_t ie_len)
2065 {
2066         struct wpa_driver_wext_data *drv = priv;
2067         struct iwreq iwr;
2068         int ret = 0;
2069
2070         os_memset(&iwr, 0, sizeof(iwr));
2071         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2072         iwr.u.data.pointer = (caddr_t) ie;
2073         iwr.u.data.length = ie_len;
2074
2075         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2076                 perror("ioctl[SIOCSIWGENIE]");
2077                 ret = -1;
2078         }
2079
2080         return ret;
2081 }
2082
2083
2084 int wpa_driver_wext_cipher2wext(int cipher)
2085 {
2086         switch (cipher) {
2087         case CIPHER_NONE:
2088                 return IW_AUTH_CIPHER_NONE;
2089         case CIPHER_WEP40:
2090                 return IW_AUTH_CIPHER_WEP40;
2091         case CIPHER_TKIP:
2092                 return IW_AUTH_CIPHER_TKIP;
2093         case CIPHER_CCMP:
2094                 return IW_AUTH_CIPHER_CCMP;
2095         case CIPHER_WEP104:
2096                 return IW_AUTH_CIPHER_WEP104;
2097         default:
2098                 return 0;
2099         }
2100 }
2101
2102
2103 int wpa_driver_wext_keymgmt2wext(int keymgmt)
2104 {
2105         switch (keymgmt) {
2106         case KEY_MGMT_802_1X:
2107         case KEY_MGMT_802_1X_NO_WPA:
2108                 return IW_AUTH_KEY_MGMT_802_1X;
2109         case KEY_MGMT_PSK:
2110                 return IW_AUTH_KEY_MGMT_PSK;
2111         default:
2112                 return 0;
2113         }
2114 }
2115
2116
2117 static int
2118 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
2119                                   struct wpa_driver_associate_params *params)
2120 {
2121         struct iwreq iwr;
2122         int ret = 0;
2123
2124         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2125                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2126
2127         os_memset(&iwr, 0, sizeof(iwr));
2128         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2129         /* Just changing mode, not actual keys */
2130         iwr.u.encoding.flags = 0;
2131         iwr.u.encoding.pointer = (caddr_t) NULL;
2132         iwr.u.encoding.length = 0;
2133
2134         /*
2135          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2136          * different things. Here they are used to indicate Open System vs.
2137          * Shared Key authentication algorithm. However, some drivers may use
2138          * them to select between open/restricted WEP encrypted (open = allow
2139          * both unencrypted and encrypted frames; restricted = only allow
2140          * encrypted frames).
2141          */
2142
2143         if (!drv->use_crypt) {
2144                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2145         } else {
2146                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2147                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2148                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2149                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2150         }
2151
2152         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2153                 perror("ioctl[SIOCSIWENCODE]");
2154                 ret = -1;
2155         }
2156
2157         return ret;
2158 }
2159
2160
2161 int wpa_driver_wext_associate(void *priv,
2162                               struct wpa_driver_associate_params *params)
2163 {
2164         struct wpa_driver_wext_data *drv = priv;
2165         int ret = 0;
2166         int allow_unencrypted_eapol;
2167         int value;
2168
2169         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2170
2171         /*
2172          * If the driver did not support SIOCSIWAUTH, fallback to
2173          * SIOCSIWENCODE here.
2174          */
2175         if (drv->auth_alg_fallback &&
2176             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2177                 ret = -1;
2178
2179         if (!params->bssid &&
2180             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2181                 ret = -1;
2182
2183         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2184                 ret = -1;
2185         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2186          * from configuration, not from here, where only the selected suite is
2187          * available */
2188         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2189             < 0)
2190                 ret = -1;
2191         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2192                 value = IW_AUTH_WPA_VERSION_DISABLED;
2193         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2194                 value = IW_AUTH_WPA_VERSION_WPA2;
2195         else
2196                 value = IW_AUTH_WPA_VERSION_WPA;
2197         if (wpa_driver_wext_set_auth_param(drv,
2198                                            IW_AUTH_WPA_VERSION, value) < 0)
2199                 ret = -1;
2200         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2201         if (wpa_driver_wext_set_auth_param(drv,
2202                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2203                 ret = -1;
2204         value = wpa_driver_wext_cipher2wext(params->group_suite);
2205         if (wpa_driver_wext_set_auth_param(drv,
2206                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2207                 ret = -1;
2208         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2209         if (wpa_driver_wext_set_auth_param(drv,
2210                                            IW_AUTH_KEY_MGMT, value) < 0)
2211                 ret = -1;
2212         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2213                 params->pairwise_suite != CIPHER_NONE ||
2214                 params->group_suite != CIPHER_NONE ||
2215                 params->wpa_ie_len;
2216         if (wpa_driver_wext_set_auth_param(drv,
2217                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2218                 ret = -1;
2219
2220         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2221          * not using WPA. IEEE 802.1X specifies that these frames are not
2222          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2223         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2224             params->key_mgmt_suite == KEY_MGMT_PSK)
2225                 allow_unencrypted_eapol = 0;
2226         else
2227                 allow_unencrypted_eapol = 1;
2228
2229         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2230                 ret = -1;
2231         if (wpa_driver_wext_set_auth_param(drv,
2232                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2233                                            allow_unencrypted_eapol) < 0)
2234                 ret = -1;
2235 #ifdef WEXT_MFP_PENDING
2236 #ifdef CONFIG_IEEE80211W
2237         switch (params->mgmt_frame_protection) {
2238         case NO_MGMT_FRAME_PROTECTION:
2239                 value = IW_AUTH_MFP_DISABLED;
2240                 break;
2241         case MGMT_FRAME_PROTECTION_OPTIONAL:
2242                 value = IW_AUTH_MFP_OPTIONAL;
2243                 break;
2244         case MGMT_FRAME_PROTECTION_REQUIRED:
2245                 value = IW_AUTH_MFP_REQUIRED;
2246                 break;
2247         };
2248         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2249                 ret = -1;
2250 #endif /* CONFIG_IEEE80211W */
2251 #endif /* WEXT_MFP_PENDING */
2252         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2253                 ret = -1;
2254         if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2255                 ret = -1;
2256         if (params->bssid &&
2257             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2258                 ret = -1;
2259
2260         return ret;
2261 }
2262
2263
2264 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2265 {
2266         struct wpa_driver_wext_data *drv = priv;
2267         int algs = 0, res;
2268
2269         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2270                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2271         if (auth_alg & AUTH_ALG_SHARED_KEY)
2272                 algs |= IW_AUTH_ALG_SHARED_KEY;
2273         if (auth_alg & AUTH_ALG_LEAP)
2274                 algs |= IW_AUTH_ALG_LEAP;
2275         if (algs == 0) {
2276                 /* at least one algorithm should be set */
2277                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2278         }
2279
2280         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2281                                              algs);
2282         drv->auth_alg_fallback = res == -2;
2283         return res;
2284 }
2285
2286
2287 /**
2288  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2289  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2290  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2291  * Returns: 0 on success, -1 on failure
2292  */
2293 int wpa_driver_wext_set_mode(void *priv, int mode)
2294 {
2295         struct wpa_driver_wext_data *drv = priv;
2296         struct iwreq iwr;
2297         int ret = -1, flags;
2298         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2299
2300         os_memset(&iwr, 0, sizeof(iwr));
2301         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2302         iwr.u.mode = new_mode;
2303         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2304                 ret = 0;
2305                 goto done;
2306         }
2307
2308         if (errno != EBUSY) {
2309                 perror("ioctl[SIOCSIWMODE]");
2310                 goto done;
2311         }
2312
2313         /* mac80211 doesn't allow mode changes while the device is up, so if
2314          * the device isn't in the mode we're about to change to, take device
2315          * down, try to set the mode again, and bring it back up.
2316          */
2317         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2318                 perror("ioctl[SIOCGIWMODE]");
2319                 goto done;
2320         }
2321
2322         if (iwr.u.mode == new_mode) {
2323                 ret = 0;
2324                 goto done;
2325         }
2326
2327         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2328                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2329
2330                 /* Try to set the mode again while the interface is down */
2331                 iwr.u.mode = new_mode;
2332                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2333                         perror("ioctl[SIOCSIWMODE]");
2334                 else
2335                         ret = 0;
2336
2337                 /* Ignore return value of get_ifflags to ensure that the device
2338                  * is always up like it was before this function was called.
2339                  */
2340                 (void) wpa_driver_wext_get_ifflags(drv, &flags);
2341                 (void) wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2342         }
2343
2344 done:
2345         return ret;
2346 }
2347
2348
2349 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2350                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2351 {
2352         struct iwreq iwr;
2353         struct iw_pmksa pmksa;
2354         int ret = 0;
2355
2356         os_memset(&iwr, 0, sizeof(iwr));
2357         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2358         os_memset(&pmksa, 0, sizeof(pmksa));
2359         pmksa.cmd = cmd;
2360         pmksa.bssid.sa_family = ARPHRD_ETHER;
2361         if (bssid)
2362                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2363         if (pmkid)
2364                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2365         iwr.u.data.pointer = (caddr_t) &pmksa;
2366         iwr.u.data.length = sizeof(pmksa);
2367
2368         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2369                 if (errno != EOPNOTSUPP)
2370                         perror("ioctl[SIOCSIWPMKSA]");
2371                 ret = -1;
2372         }
2373
2374         return ret;
2375 }
2376
2377
2378 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2379                                      const u8 *pmkid)
2380 {
2381         struct wpa_driver_wext_data *drv = priv;
2382         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2383 }
2384
2385
2386 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2387                                         const u8 *pmkid)
2388 {
2389         struct wpa_driver_wext_data *drv = priv;
2390         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2391 }
2392
2393
2394 static int wpa_driver_wext_flush_pmkid(void *priv)
2395 {
2396         struct wpa_driver_wext_data *drv = priv;
2397         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2398 }
2399
2400
2401 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2402 {
2403         struct wpa_driver_wext_data *drv = priv;
2404         if (!drv->has_capability)
2405                 return -1;
2406         os_memcpy(capa, &drv->capa, sizeof(*capa));
2407         return 0;
2408 }
2409
2410
2411 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2412                                         const char *ifname)
2413 {
2414         if (ifname == NULL) {
2415                 drv->ifindex2 = -1;
2416                 return 0;
2417         }
2418
2419         drv->ifindex2 = if_nametoindex(ifname);
2420         if (drv->ifindex2 <= 0)
2421                 return -1;
2422
2423         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2424                    "wireless events", drv->ifindex2, ifname);
2425
2426         return 0;
2427 }
2428
2429
2430 int wpa_driver_wext_set_operstate(void *priv, int state)
2431 {
2432         struct wpa_driver_wext_data *drv = priv;
2433
2434         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2435                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2436         drv->operstate = state;
2437         return wpa_driver_wext_send_oper_ifla(
2438                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2439 }
2440
2441
2442 #ifdef CONFIG_CLIENT_MLME
2443 static int hostapd_ioctl(struct wpa_driver_wext_data *drv,
2444                          struct prism2_hostapd_param *param, int len)
2445 {
2446         struct iwreq iwr;
2447
2448         os_memset(&iwr, 0, sizeof(iwr));
2449         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2450         iwr.u.data.pointer = (caddr_t) param;
2451         iwr.u.data.length = len;
2452
2453         if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
2454                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2455                 return -1;
2456         }
2457
2458         return 0;
2459 }
2460
2461
2462 static struct wpa_hw_modes *
2463 wpa_driver_wext_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2464 {
2465         struct wpa_driver_wext_data *drv = priv;
2466         struct prism2_hostapd_param *param;
2467         u8 *pos, *end;
2468         struct wpa_hw_modes *modes = NULL;
2469         int i;
2470
2471         param = os_zalloc(PRISM2_HOSTAPD_MAX_BUF_SIZE);
2472         if (param == NULL)
2473                 return NULL;
2474         param->cmd = PRISM2_HOSTAPD_GET_HW_FEATURES;
2475
2476         if (hostapd_ioctl(drv, param, PRISM2_HOSTAPD_MAX_BUF_SIZE) < 0) {
2477                 perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
2478                 goto out;
2479         }
2480
2481         *num_modes = param->u.hw_features.num_modes;
2482         *flags = param->u.hw_features.flags;
2483
2484         pos = param->u.hw_features.data;
2485         end = pos + PRISM2_HOSTAPD_MAX_BUF_SIZE -
2486                 (param->u.hw_features.data - (u8 *) param);
2487
2488         modes = os_zalloc(*num_modes * sizeof(struct wpa_hw_modes));
2489         if (modes == NULL)
2490                 goto out;
2491
2492         for (i = 0; i < *num_modes; i++) {
2493                 struct hostapd_ioctl_hw_modes_hdr *hdr;
2494                 struct wpa_hw_modes *feature;
2495                 int clen, rlen;
2496
2497                 hdr = (struct hostapd_ioctl_hw_modes_hdr *) pos;
2498                 pos = (u8 *) (hdr + 1);
2499                 clen = hdr->num_channels * sizeof(struct wpa_channel_data);
2500                 rlen = hdr->num_rates * sizeof(struct wpa_rate_data);
2501
2502                 feature = &modes[i];
2503                 switch (hdr->mode) {
2504                 case MODE_IEEE80211A:
2505                         feature->mode = WPA_MODE_IEEE80211A;
2506                         break;
2507                 case MODE_IEEE80211B:
2508                         feature->mode = WPA_MODE_IEEE80211B;
2509                         break;
2510                 case MODE_IEEE80211G:
2511                         feature->mode = WPA_MODE_IEEE80211G;
2512                         break;
2513                 case MODE_ATHEROS_TURBO:
2514                 case MODE_ATHEROS_TURBOG:
2515                         wpa_printf(MSG_ERROR, "Skip unsupported hw_mode=%d in "
2516                                    "get_hw_features data", hdr->mode);
2517                         pos += clen + rlen;
2518                         continue;
2519                 default:
2520                         wpa_printf(MSG_ERROR, "Unknown hw_mode=%d in "
2521                                    "get_hw_features data", hdr->mode);
2522                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2523                         modes = NULL;
2524                         break;
2525                 }
2526                 feature->num_channels = hdr->num_channels;
2527                 feature->num_rates = hdr->num_rates;
2528
2529                 feature->channels = os_malloc(clen);
2530                 feature->rates = os_malloc(rlen);
2531                 if (!feature->channels || !feature->rates ||
2532                     pos + clen + rlen > end) {
2533                         wpa_supplicant_sta_free_hw_features(modes, *num_modes);
2534                         modes = NULL;
2535                         break;
2536                 }
2537
2538                 os_memcpy(feature->channels, pos, clen);
2539                 pos += clen;
2540                 os_memcpy(feature->rates, pos, rlen);
2541                 pos += rlen;
2542         }
2543
2544 out:
2545         os_free(param);
2546         return modes;
2547 }
2548
2549
2550 int wpa_driver_wext_set_channel(void *priv, wpa_hw_mode phymode, int chan,
2551                                 int freq)
2552 {
2553         return wpa_driver_wext_set_freq(priv, freq);
2554 }
2555
2556
2557 static void wpa_driver_wext_mlme_read(int sock, void *eloop_ctx,
2558                                       void *sock_ctx)
2559 {
2560         struct wpa_driver_wext_data *drv = eloop_ctx;
2561         int len;
2562         unsigned char buf[3000];
2563         struct ieee80211_frame_info *fi;
2564         struct ieee80211_rx_status rx_status;
2565
2566         len = recv(sock, buf, sizeof(buf), 0);
2567         if (len < 0) {
2568                 perror("recv[MLME]");
2569                 return;
2570         }
2571
2572         if (len < (int) sizeof(struct ieee80211_frame_info)) {
2573                 wpa_printf(MSG_DEBUG, "WEXT: Too short MLME frame (len=%d)",
2574                            len);
2575                 return;
2576         }
2577
2578         fi = (struct ieee80211_frame_info *) buf;
2579         if (ntohl(fi->version) != IEEE80211_FI_VERSION) {
2580                 wpa_printf(MSG_DEBUG, "WEXT: Invalid MLME frame info version "
2581                            "0x%x", ntohl(fi->version));
2582                 return;
2583         }
2584
2585         os_memset(&rx_status, 0, sizeof(rx_status));
2586         rx_status.ssi = ntohl(fi->ssi_signal);
2587         rx_status.channel = ntohl(fi->channel);
2588
2589         wpa_supplicant_sta_rx(drv->ctx,
2590                               buf + sizeof(struct ieee80211_frame_info),
2591                               len - sizeof(struct ieee80211_frame_info),
2592                               &rx_status);
2593 }
2594
2595
2596 static int wpa_driver_wext_open_mlme(struct wpa_driver_wext_data *drv)
2597 {
2598         int flags, ifindex, s;
2599         struct sockaddr_ll addr;
2600         struct ifreq ifr;
2601
2602         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_USER_SPACE_MLME, 1) <
2603             0) {
2604                 wpa_printf(MSG_ERROR, "WEXT: Failed to configure driver to "
2605                            "use user space MLME");
2606                 return -1;
2607         }
2608
2609         if (wpa_driver_prism2_param_set(drv, PRISM2_PARAM_MGMT_IF, 1) < 0) {
2610                 wpa_printf(MSG_ERROR, "WEXT: Failed to add management "
2611                            "interface for user space MLME");
2612                 return -1;
2613         }
2614
2615         ifindex = wpa_driver_prism2_param_get(drv, PRISM2_PARAM_MGMT_IF);
2616         if (ifindex <= 0) {
2617                 wpa_printf(MSG_ERROR, "WEXT: MLME management device not "
2618                            "found");
2619                 return -1;
2620         }
2621
2622         os_memset(&ifr, 0, sizeof(ifr));
2623         ifr.ifr_ifindex = ifindex;
2624         if (ioctl(drv->ioctl_sock, SIOCGIFNAME, &ifr) != 0) {
2625                 perror("ioctl(SIOCGIFNAME)");
2626                 return -1;
2627         }
2628         os_strlcpy(drv->mlmedev, ifr.ifr_name, sizeof(drv->mlmedev));
2629         wpa_printf(MSG_DEBUG, "WEXT: MLME management device '%s'",
2630                    drv->mlmedev);
2631
2632         if (wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev, &flags) != 0
2633             || wpa_driver_wext_set_ifflags_ifname(drv, drv->mlmedev,
2634                                                   flags | IFF_UP) != 0) {
2635                 wpa_printf(MSG_ERROR, "WEXT: Could not set interface "
2636                            "'%s' UP", drv->mlmedev);
2637                 return -1;
2638         }
2639
2640         s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2641         if (s < 0) {
2642                 perror("socket[PF_PACKET,SOCK_RAW]");
2643                 return -1;
2644         }
2645
2646         os_memset(&addr, 0, sizeof(addr));
2647         addr.sll_family = AF_PACKET;
2648         addr.sll_ifindex = ifindex;
2649
2650         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
2651                 perror("bind(MLME)");
2652                 return -1;
2653         }
2654
2655         if (eloop_register_read_sock(s, wpa_driver_wext_mlme_read, drv, NULL))
2656         {
2657                 wpa_printf(MSG_ERROR, "WEXT: Could not register MLME read "
2658                            "socket");
2659                 close(s);
2660                 return -1;
2661         }
2662
2663         return s;
2664 }
2665
2666
2667 static int wpa_driver_wext_send_mlme(void *priv, const u8 *data,
2668                                      size_t data_len)
2669 {
2670         struct wpa_driver_wext_data *drv = priv;
2671         int ret;
2672
2673         ret = send(drv->mlme_sock, data, data_len, 0);
2674         if (ret < 0) {
2675                 perror("send[MLME]");
2676                 return -1;
2677         }
2678
2679         return 0;
2680 }
2681
2682
2683 static int wpa_driver_wext_mlme_add_sta(void *priv, const u8 *addr,
2684                                         const u8 *supp_rates,
2685                                         size_t supp_rates_len)
2686 {
2687         struct wpa_driver_wext_data *drv = priv;
2688         struct prism2_hostapd_param param;
2689         size_t len;
2690
2691         os_memset(&param, 0, sizeof(param));
2692         param.cmd = PRISM2_HOSTAPD_ADD_STA;
2693         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2694         len = supp_rates_len;
2695         if (len > sizeof(param.u.add_sta.supp_rates))
2696                 len = sizeof(param.u.add_sta.supp_rates);
2697         os_memcpy(param.u.add_sta.supp_rates, supp_rates, len);
2698         return hostapd_ioctl(drv, &param, sizeof(param));
2699 }
2700
2701
2702 static int wpa_driver_wext_mlme_remove_sta(void *priv, const u8 *addr)
2703 {
2704         struct wpa_driver_wext_data *drv = priv;
2705         struct prism2_hostapd_param param;
2706
2707         os_memset(&param, 0, sizeof(param));
2708         param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
2709         os_memcpy(param.sta_addr, addr, ETH_ALEN);
2710         return hostapd_ioctl(drv, &param, sizeof(param));
2711 }
2712
2713 #endif /* CONFIG_CLIENT_MLME */
2714
2715
2716 static int wpa_driver_wext_set_param(void *priv, const char *param)
2717 {
2718 #ifdef CONFIG_CLIENT_MLME
2719         struct wpa_driver_wext_data *drv = priv;
2720
2721         if (param == NULL)
2722                 return 0;
2723
2724         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2725
2726         if (os_strstr(param, "use_mlme=1")) {
2727                 wpa_printf(MSG_DEBUG, "WEXT: Using user space MLME");
2728                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2729
2730                 drv->mlme_sock = wpa_driver_wext_open_mlme(drv);
2731                 if (drv->mlme_sock < 0)
2732                         return -1;
2733         }
2734 #endif /* CONFIG_CLIENT_MLME */
2735
2736         return 0;
2737 }
2738
2739
2740 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2741 {
2742         return drv->we_version_compiled;
2743 }
2744
2745
2746 const struct wpa_driver_ops wpa_driver_wext_ops = {
2747         .name = "wext",
2748         .desc = "Linux wireless extensions (generic)",
2749         .get_bssid = wpa_driver_wext_get_bssid,
2750         .get_ssid = wpa_driver_wext_get_ssid,
2751         .set_wpa = wpa_driver_wext_set_wpa,
2752         .set_key = wpa_driver_wext_set_key,
2753         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2754         .set_drop_unencrypted = wpa_driver_wext_set_drop_unencrypted,
2755         .scan = wpa_driver_wext_scan,
2756         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2757         .deauthenticate = wpa_driver_wext_deauthenticate,
2758         .disassociate = wpa_driver_wext_disassociate,
2759         .associate = wpa_driver_wext_associate,
2760         .set_auth_alg = wpa_driver_wext_set_auth_alg,
2761         .init = wpa_driver_wext_init,
2762         .deinit = wpa_driver_wext_deinit,
2763         .set_param = wpa_driver_wext_set_param,
2764         .add_pmkid = wpa_driver_wext_add_pmkid,
2765         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2766         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2767         .get_capa = wpa_driver_wext_get_capa,
2768         .set_operstate = wpa_driver_wext_set_operstate,
2769 #ifdef CONFIG_CLIENT_MLME
2770         .get_hw_feature_data = wpa_driver_wext_get_hw_feature_data,
2771         .set_channel = wpa_driver_wext_set_channel,
2772         .set_ssid = wpa_driver_wext_set_ssid,
2773         .set_bssid = wpa_driver_wext_set_bssid,
2774         .send_mlme = wpa_driver_wext_send_mlme,
2775         .mlme_add_sta = wpa_driver_wext_mlme_add_sta,
2776         .mlme_remove_sta = wpa_driver_wext_mlme_remove_sta,
2777 #endif /* CONFIG_CLIENT_MLME */
2778 };