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