www.project-moonshot.org Git - mech_eap.orig/blob - src/drivers/driver_wext.c

   1 /*
   2  * Driver interaction with generic Linux Wireless Extensions
   3  * Copyright (c) 2003-2010, 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 <sys/stat.h>
  24 #include <net/if_arp.h>
  25
  26 #include "wireless_copy.h"
  27 #include "common.h"
  28 #include "eloop.h"
  29 #include "common/ieee802_11_defs.h"
  30 #include "common/wpa_common.h"
  31 #include "priv_netlink.h"
  32 #include "netlink.h"
  33 #include "linux_ioctl.h"
  34 #include "driver.h"
  35 #include "driver_wext.h"
  36
  37
  38 static int wpa_driver_wext_flush_pmkid(void *priv);
  39 static int wpa_driver_wext_get_range(void *priv);
  40 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
  41 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv);
  42 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg);
  43
  44
  45 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
  46                                    int idx, u32 value)
  47 {
  48         struct iwreq iwr;
  49         int ret = 0;
  50
  51         os_memset(&iwr, 0, sizeof(iwr));
  52         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
  53         iwr.u.param.flags = idx & IW_AUTH_INDEX;
  54         iwr.u.param.value = value;
  55
  56         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
  57                 if (errno != EOPNOTSUPP) {
  58                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
  59                                    "value 0x%x) failed: %s)",
  60                                    idx, value, strerror(errno));
  61                 }
  62                 ret = errno == EOPNOTSUPP ? -2 : -1;
  63         }
  64
  65         return ret;
  66 }
  67
  68
  69 /**
  70  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
  71  * @priv: Pointer to private wext data from wpa_driver_wext_init()
  72  * @bssid: Buffer for BSSID
  73  * Returns: 0 on success, -1 on failure
  74  */
  75 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
  76 {
  77         struct wpa_driver_wext_data *drv = priv;
  78         struct iwreq iwr;
  79         int ret = 0;
  80
  81         os_memset(&iwr, 0, sizeof(iwr));
  82         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
  83
  84         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
  85                 perror("ioctl[SIOCGIWAP]");
  86                 ret = -1;
  87         }
  88         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
  89
  90         return ret;
  91 }
  92
  93
  94 /**
  95  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
  96  * @priv: Pointer to private wext data from wpa_driver_wext_init()
  97  * @bssid: BSSID
  98  * Returns: 0 on success, -1 on failure
  99  */
 100 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
 101 {
 102         struct wpa_driver_wext_data *drv = priv;
 103         struct iwreq iwr;
 104         int ret = 0;
 105
 106         os_memset(&iwr, 0, sizeof(iwr));
 107         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 108         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 109         if (bssid)
 110                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 111         else
 112                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 113
 114         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 115                 perror("ioctl[SIOCSIWAP]");
 116                 ret = -1;
 117         }
 118
 119         return ret;
 120 }
 121
 122
 123 /**
 124  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 125  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 126  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 127  * Returns: SSID length on success, -1 on failure
 128  */
 129 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 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         iwr.u.essid.pointer = (caddr_t) ssid;
 138         iwr.u.essid.length = 32;
 139
 140         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 141                 perror("ioctl[SIOCGIWESSID]");
 142                 ret = -1;
 143         } else {
 144                 ret = iwr.u.essid.length;
 145                 if (ret > 32)
 146                         ret = 32;
 147                 /* Some drivers include nul termination in the SSID, so let's
 148                  * remove it here before further processing. WE-21 changes this
 149                  * to explicitly require the length _not_ to include nul
 150                  * termination. */
 151                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 152                     drv->we_version_compiled < 21)
 153                         ret--;
 154         }
 155
 156         return ret;
 157 }
 158
 159
 160 /**
 161  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 162  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 163  * @ssid: SSID
 164  * @ssid_len: Length of SSID (0..32)
 165  * Returns: 0 on success, -1 on failure
 166  */
 167 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 168 {
 169         struct wpa_driver_wext_data *drv = priv;
 170         struct iwreq iwr;
 171         int ret = 0;
 172         char buf[33];
 173
 174         if (ssid_len > 32)
 175                 return -1;
 176
 177         os_memset(&iwr, 0, sizeof(iwr));
 178         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 179         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 180         iwr.u.essid.flags = (ssid_len != 0);
 181         os_memset(buf, 0, sizeof(buf));
 182         os_memcpy(buf, ssid, ssid_len);
 183         iwr.u.essid.pointer = (caddr_t) buf;
 184         if (drv->we_version_compiled < 21) {
 185                 /* For historic reasons, set SSID length to include one extra
 186                  * character, C string nul termination, even though SSID is
 187                  * really an octet string that should not be presented as a C
 188                  * string. Some Linux drivers decrement the length by one and
 189                  * can thus end up missing the last octet of the SSID if the
 190                  * length is not incremented here. WE-21 changes this to
 191                  * explicitly require the length _not_ to include nul
 192                  * termination. */
 193                 if (ssid_len)
 194                         ssid_len++;
 195         }
 196         iwr.u.essid.length = ssid_len;
 197
 198         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 199                 perror("ioctl[SIOCSIWESSID]");
 200                 ret = -1;
 201         }
 202
 203         return ret;
 204 }
 205
 206
 207 /**
 208  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 209  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 210  * @freq: Frequency in MHz
 211  * Returns: 0 on success, -1 on failure
 212  */
 213 int wpa_driver_wext_set_freq(void *priv, int freq)
 214 {
 215         struct wpa_driver_wext_data *drv = priv;
 216         struct iwreq iwr;
 217         int ret = 0;
 218
 219         os_memset(&iwr, 0, sizeof(iwr));
 220         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 221         iwr.u.freq.m = freq * 100000;
 222         iwr.u.freq.e = 1;
 223
 224         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 225                 perror("ioctl[SIOCSIWFREQ]");
 226                 ret = -1;
 227         }
 228
 229         return ret;
 230 }
 231
 232
 233 static void
 234 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 235 {
 236         union wpa_event_data data;
 237
 238         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 239                    custom);
 240
 241         os_memset(&data, 0, sizeof(data));
 242         /* Host AP driver */
 243         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 244                 data.michael_mic_failure.unicast =
 245                         os_strstr(custom, " unicast ") != NULL;
 246                 /* TODO: parse parameters(?) */
 247                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 248         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 249                 char *spos;
 250                 int bytes;
 251                 u8 *req_ies = NULL, *resp_ies = NULL;
 252
 253                 spos = custom + 17;
 254
 255                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 256                 if (!bytes || (bytes & 1))
 257                         return;
 258                 bytes /= 2;
 259
 260                 req_ies = os_malloc(bytes);
 261                 if (req_ies == NULL ||
 262                     hexstr2bin(spos, req_ies, bytes) < 0)
 263                         goto done;
 264                 data.assoc_info.req_ies = req_ies;
 265                 data.assoc_info.req_ies_len = bytes;
 266
 267                 spos += bytes * 2;
 268
 269                 data.assoc_info.resp_ies = NULL;
 270                 data.assoc_info.resp_ies_len = 0;
 271
 272                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 273                         spos += 9;
 274
 275                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 276                         if (!bytes || (bytes & 1))
 277                                 goto done;
 278                         bytes /= 2;
 279
 280                         resp_ies = os_malloc(bytes);
 281                         if (resp_ies == NULL ||
 282                             hexstr2bin(spos, resp_ies, bytes) < 0)
 283                                 goto done;
 284                         data.assoc_info.resp_ies = resp_ies;
 285                         data.assoc_info.resp_ies_len = bytes;
 286                 }
 287
 288                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 289
 290         done:
 291                 os_free(resp_ies);
 292                 os_free(req_ies);
 293 #ifdef CONFIG_PEERKEY
 294         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 295                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 296                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 297                                    "STKSTART.request '%s'", custom + 17);
 298                         return;
 299                 }
 300                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 301 #endif /* CONFIG_PEERKEY */
 302         }
 303 }
 304
 305
 306 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 307         void *ctx, const char *ev, size_t len)
 308 {
 309         const struct iw_michaelmicfailure *mic;
 310         union wpa_event_data data;
 311
 312         if (len < sizeof(*mic))
 313                 return -1;
 314
 315         mic = (const struct iw_michaelmicfailure *) ev;
 316
 317         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 318                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 319                    MAC2STR(mic->src_addr.sa_data));
 320
 321         os_memset(&data, 0, sizeof(data));
 322         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 323         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 324
 325         return 0;
 326 }
 327
 328
 329 static int wpa_driver_wext_event_wireless_pmkidcand(
 330         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 331 {
 332         const struct iw_pmkid_cand *cand;
 333         union wpa_event_data data;
 334         const u8 *addr;
 335
 336         if (len < sizeof(*cand))
 337                 return -1;
 338
 339         cand = (const struct iw_pmkid_cand *) ev;
 340         addr = (const u8 *) cand->bssid.sa_data;
 341
 342         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 343                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 344                    cand->index, MAC2STR(addr));
 345
 346         os_memset(&data, 0, sizeof(data));
 347         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 348         data.pmkid_candidate.index = cand->index;
 349         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 350         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 351
 352         return 0;
 353 }
 354
 355
 356 static int wpa_driver_wext_event_wireless_assocreqie(
 357         struct wpa_driver_wext_data *drv, const char *ev, int len)
 358 {
 359         if (len < 0)
 360                 return -1;
 361
 362         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 363                     len);
 364         os_free(drv->assoc_req_ies);
 365         drv->assoc_req_ies = os_malloc(len);
 366         if (drv->assoc_req_ies == NULL) {
 367                 drv->assoc_req_ies_len = 0;
 368                 return -1;
 369         }
 370         os_memcpy(drv->assoc_req_ies, ev, len);
 371         drv->assoc_req_ies_len = len;
 372
 373         return 0;
 374 }
 375
 376
 377 static int wpa_driver_wext_event_wireless_assocrespie(
 378         struct wpa_driver_wext_data *drv, const char *ev, int len)
 379 {
 380         if (len < 0)
 381                 return -1;
 382
 383         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 384                     len);
 385         os_free(drv->assoc_resp_ies);
 386         drv->assoc_resp_ies = os_malloc(len);
 387         if (drv->assoc_resp_ies == NULL) {
 388                 drv->assoc_resp_ies_len = 0;
 389                 return -1;
 390         }
 391         os_memcpy(drv->assoc_resp_ies, ev, len);
 392         drv->assoc_resp_ies_len = len;
 393
 394         return 0;
 395 }
 396
 397
 398 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 399 {
 400         union wpa_event_data data;
 401
 402         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 403                 return;
 404
 405         os_memset(&data, 0, sizeof(data));
 406         if (drv->assoc_req_ies) {
 407                 data.assoc_info.req_ies = drv->assoc_req_ies;
 408                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 409         }
 410         if (drv->assoc_resp_ies) {
 411                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 412                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 413         }
 414
 415         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 416
 417         os_free(drv->assoc_req_ies);
 418         drv->assoc_req_ies = NULL;
 419         os_free(drv->assoc_resp_ies);
 420         drv->assoc_resp_ies = NULL;
 421 }
 422
 423
 424 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 425                                            char *data, int len)
 426 {
 427         struct iw_event iwe_buf, *iwe = &iwe_buf;
 428         char *pos, *end, *custom, *buf;
 429
 430         pos = data;
 431         end = data + len;
 432
 433         while (pos + IW_EV_LCP_LEN <= end) {
 434                 /* Event data may be unaligned, so make a local, aligned copy
 435                  * before processing. */
 436                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 437                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 438                            iwe->cmd, iwe->len);
 439                 if (iwe->len <= IW_EV_LCP_LEN)
 440                         return;
 441
 442                 custom = pos + IW_EV_POINT_LEN;
 443                 if (drv->we_version_compiled > 18 &&
 444                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 445                      iwe->cmd == IWEVCUSTOM ||
 446                      iwe->cmd == IWEVASSOCREQIE ||
 447                      iwe->cmd == IWEVASSOCRESPIE ||
 448                      iwe->cmd == IWEVPMKIDCAND)) {
 449                         /* WE-19 removed the pointer from struct iw_point */
 450                         char *dpos = (char *) &iwe_buf.u.data.length;
 451                         int dlen = dpos - (char *) &iwe_buf;
 452                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 453                                   sizeof(struct iw_event) - dlen);
 454                 } else {
 455                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 456                         custom += IW_EV_POINT_OFF;
 457                 }
 458
 459                 switch (iwe->cmd) {
 460                 case SIOCGIWAP:
 461                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 462                                    MACSTR,
 463                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 464                         if (is_zero_ether_addr(
 465                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 466                             os_memcmp(iwe->u.ap_addr.sa_data,
 467                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 468                             0) {
 469                                 os_free(drv->assoc_req_ies);
 470                                 drv->assoc_req_ies = NULL;
 471                                 os_free(drv->assoc_resp_ies);
 472                                 drv->assoc_resp_ies = NULL;
 473                                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC,
 474                                                      NULL);
 475
 476                         } else {
 477                                 wpa_driver_wext_event_assoc_ies(drv);
 478                                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC,
 479                                                      NULL);
 480                         }
 481                         break;
 482                 case IWEVMICHAELMICFAILURE:
 483                         if (custom + iwe->u.data.length > end) {
 484                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 485                                            "IWEVMICHAELMICFAILURE length");
 486                                 return;
 487                         }
 488                         wpa_driver_wext_event_wireless_michaelmicfailure(
 489                                 drv->ctx, custom, iwe->u.data.length);
 490                         break;
 491                 case IWEVCUSTOM:
 492                         if (custom + iwe->u.data.length > end) {
 493                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 494                                            "IWEVCUSTOM length");
 495                                 return;
 496                         }
 497                         buf = os_malloc(iwe->u.data.length + 1);
 498                         if (buf == NULL)
 499                                 return;
 500                         os_memcpy(buf, custom, iwe->u.data.length);
 501                         buf[iwe->u.data.length] = '\0';
 502                         wpa_driver_wext_event_wireless_custom(drv->ctx, buf);
 503                         os_free(buf);
 504                         break;
 505                 case SIOCGIWSCAN:
 506                         drv->scan_complete_events = 1;
 507                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 508                                              drv, drv->ctx);
 509                         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS,
 510                                              NULL);
 511                         break;
 512                 case IWEVASSOCREQIE:
 513                         if (custom + iwe->u.data.length > end) {
 514                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 515                                            "IWEVASSOCREQIE length");
 516                                 return;
 517                         }
 518                         wpa_driver_wext_event_wireless_assocreqie(
 519                                 drv, custom, iwe->u.data.length);
 520                         break;
 521                 case IWEVASSOCRESPIE:
 522                         if (custom + iwe->u.data.length > end) {
 523                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 524                                            "IWEVASSOCRESPIE length");
 525                                 return;
 526                         }
 527                         wpa_driver_wext_event_wireless_assocrespie(
 528                                 drv, custom, iwe->u.data.length);
 529                         break;
 530                 case IWEVPMKIDCAND:
 531                         if (custom + iwe->u.data.length > end) {
 532                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 533                                            "IWEVPMKIDCAND length");
 534                                 return;
 535                         }
 536                         wpa_driver_wext_event_wireless_pmkidcand(
 537                                 drv, custom, iwe->u.data.length);
 538                         break;
 539                 }
 540
 541                 pos += iwe->len;
 542         }
 543 }
 544
 545
 546 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 547                                        char *buf, size_t len, int del)
 548 {
 549         union wpa_event_data event;
 550
 551         os_memset(&event, 0, sizeof(event));
 552         if (len > sizeof(event.interface_status.ifname))
 553                 len = sizeof(event.interface_status.ifname) - 1;
 554         os_memcpy(event.interface_status.ifname, buf, len);
 555         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 556                 EVENT_INTERFACE_ADDED;
 557
 558         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 559                    del ? "DEL" : "NEW",
 560                    event.interface_status.ifname,
 561                    del ? "removed" : "added");
 562
 563         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 564                 if (del)
 565                         drv->if_removed = 1;
 566                 else
 567                         drv->if_removed = 0;
 568         }
 569
 570         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 571 }
 572
 573
 574 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 575                                       u8 *buf, size_t len)
 576 {
 577         int attrlen, rta_len;
 578         struct rtattr *attr;
 579
 580         attrlen = len;
 581         attr = (struct rtattr *) buf;
 582
 583         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 584         while (RTA_OK(attr, attrlen)) {
 585                 if (attr->rta_type == IFLA_IFNAME) {
 586                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 587                             == 0)
 588                                 return 1;
 589                         else
 590                                 break;
 591                 }
 592                 attr = RTA_NEXT(attr, attrlen);
 593         }
 594
 595         return 0;
 596 }
 597
 598
 599 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 600                                        int ifindex, u8 *buf, size_t len)
 601 {
 602         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 603                 return 1;
 604
 605         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, buf, len)) {
 606                 drv->ifindex = if_nametoindex(drv->ifname);
 607                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 608                            "interface");
 609                 wpa_driver_wext_finish_drv_init(drv);
 610                 return 1;
 611         }
 612
 613         return 0;
 614 }
 615
 616
 617 static void wpa_driver_wext_event_rtm_newlink(void *ctx, struct ifinfomsg *ifi,
 618                                               u8 *buf, size_t len)
 619 {
 620         struct wpa_driver_wext_data *drv = ctx;
 621         int attrlen, rta_len;
 622         struct rtattr *attr;
 623
 624         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 625                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 626                            ifi->ifi_index);
 627                 return;
 628         }
 629
 630         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 631                    "(%s%s%s%s)",
 632                    drv->operstate, ifi->ifi_flags,
 633                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 634                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 635                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 636                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 637         /*
 638          * Some drivers send the association event before the operup event--in
 639          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 640          * fails. This will hit us when wpa_supplicant does not need to do
 641          * IEEE 802.1X authentication
 642          */
 643         if (drv->operstate == 1 &&
 644             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 645             !(ifi->ifi_flags & IFF_RUNNING))
 646                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 647                                        -1, IF_OPER_UP);
 648
 649         attrlen = len;
 650         attr = (struct rtattr *) buf;
 651
 652         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 653         while (RTA_OK(attr, attrlen)) {
 654                 if (attr->rta_type == IFLA_WIRELESS) {
 655                         wpa_driver_wext_event_wireless(
 656                                 drv, ((char *) attr) + rta_len,
 657                                 attr->rta_len - rta_len);
 658                 } else if (attr->rta_type == IFLA_IFNAME) {
 659                         wpa_driver_wext_event_link(drv,
 660                                                    ((char *) attr) + rta_len,
 661                                                    attr->rta_len - rta_len, 0);
 662                 }
 663                 attr = RTA_NEXT(attr, attrlen);
 664         }
 665 }
 666
 667
 668 static void wpa_driver_wext_event_rtm_dellink(void *ctx, struct ifinfomsg *ifi,
 669                                               u8 *buf, size_t len)
 670 {
 671         struct wpa_driver_wext_data *drv = ctx;
 672         int attrlen, rta_len;
 673         struct rtattr *attr;
 674
 675         attrlen = len;
 676         attr = (struct rtattr *) buf;
 677
 678         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 679         while (RTA_OK(attr, attrlen)) {
 680                 if (attr->rta_type == IFLA_IFNAME) {
 681                         wpa_driver_wext_event_link(drv,
 682                                                    ((char *) attr) + rta_len,
 683                                                    attr->rta_len - rta_len, 1);
 684                 }
 685                 attr = RTA_NEXT(attr, attrlen);
 686         }
 687 }
 688
 689
 690 /**
 691  * wpa_driver_wext_init - Initialize WE driver interface
 692  * @ctx: context to be used when calling wpa_supplicant functions,
 693  * e.g., wpa_supplicant_event()
 694  * @ifname: interface name, e.g., wlan0
 695  * Returns: Pointer to private data, %NULL on failure
 696  */
 697 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 698 {
 699         struct wpa_driver_wext_data *drv;
 700         struct netlink_config *cfg;
 701         char path[128];
 702         struct stat buf;
 703
 704         drv = os_zalloc(sizeof(*drv));
 705         if (drv == NULL)
 706                 return NULL;
 707         drv->ctx = ctx;
 708         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 709
 710         os_snprintf(path, sizeof(path), "/sys/class/net/%s/phy80211", ifname);
 711         if (stat(path, &buf) == 0) {
 712                 wpa_printf(MSG_DEBUG, "WEXT: cfg80211-based driver detected");
 713                 drv->cfg80211 = 1;
 714         }
 715
 716         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 717         if (drv->ioctl_sock < 0) {
 718                 perror("socket(PF_INET,SOCK_DGRAM)");
 719                 goto err1;
 720         }
 721
 722         cfg = os_zalloc(sizeof(*cfg));
 723         if (cfg == NULL)
 724                 goto err1;
 725         cfg->ctx = drv;
 726         cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink;
 727         cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink;
 728         drv->netlink = netlink_init(cfg);
 729         if (drv->netlink == NULL) {
 730                 os_free(cfg);
 731                 goto err2;
 732         }
 733
 734         drv->mlme_sock = -1;
 735
 736         if (wpa_driver_wext_finish_drv_init(drv) < 0)
 737                 goto err3;
 738
 739         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1);
 740
 741         return drv;
 742
 743 err3:
 744         netlink_deinit(drv->netlink);
 745 err2:
 746         close(drv->ioctl_sock);
 747 err1:
 748         os_free(drv);
 749         return NULL;
 750 }
 751
 752
 753 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
 754 {
 755         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1) < 0)
 756                 return -1;
 757
 758         /*
 759          * Make sure that the driver does not have any obsolete PMKID entries.
 760          */
 761         wpa_driver_wext_flush_pmkid(drv);
 762
 763         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
 764                 wpa_printf(MSG_DEBUG, "Could not configure driver to use "
 765                            "managed mode");
 766                 /* Try to use it anyway */
 767         }
 768
 769         wpa_driver_wext_get_range(drv);
 770
 771         /*
 772          * Unlock the driver's BSSID and force to a random SSID to clear any
 773          * previous association the driver might have when the supplicant
 774          * starts up.
 775          */
 776         wpa_driver_wext_disconnect(drv);
 777
 778         drv->ifindex = if_nametoindex(drv->ifname);
 779
 780         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
 781                 /*
 782                  * Host AP driver may use both wlan# and wifi# interface in
 783                  * wireless events. Since some of the versions included WE-18
 784                  * support, let's add the alternative ifindex also from
 785                  * driver_wext.c for the time being. This may be removed at
 786                  * some point once it is believed that old versions of the
 787                  * driver are not in use anymore.
 788                  */
 789                 char ifname2[IFNAMSIZ + 1];
 790                 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
 791                 os_memcpy(ifname2, "wifi", 4);
 792                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
 793         }
 794
 795         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 796                                1, IF_OPER_DORMANT);
 797
 798         return 0;
 799 }
 800
 801
 802 /**
 803  * wpa_driver_wext_deinit - Deinitialize WE driver interface
 804  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 805  *
 806  * Shut down driver interface and processing of driver events. Free
 807  * private data buffer if one was allocated in wpa_driver_wext_init().
 808  */
 809 void wpa_driver_wext_deinit(void *priv)
 810 {
 811         struct wpa_driver_wext_data *drv = priv;
 812
 813         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
 814
 815         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
 816
 817         /*
 818          * Clear possibly configured driver parameters in order to make it
 819          * easier to use the driver after wpa_supplicant has been terminated.
 820          */
 821         wpa_driver_wext_disconnect(drv);
 822
 823         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
 824         netlink_deinit(drv->netlink);
 825
 826         if (drv->mlme_sock >= 0)
 827                 eloop_unregister_read_sock(drv->mlme_sock);
 828
 829         (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
 830
 831         close(drv->ioctl_sock);
 832         if (drv->mlme_sock >= 0)
 833                 close(drv->mlme_sock);
 834         os_free(drv->assoc_req_ies);
 835         os_free(drv->assoc_resp_ies);
 836         os_free(drv);
 837 }
 838
 839
 840 /**
 841  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
 842  * @eloop_ctx: Unused
 843  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
 844  *
 845  * This function can be used as registered timeout when starting a scan to
 846  * generate a scan completed event if the driver does not report this.
 847  */
 848 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 849 {
 850         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
 851         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
 852 }
 853
 854
 855 /**
 856  * wpa_driver_wext_scan - Request the driver to initiate scan
 857  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 858  * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
 859  * Returns: 0 on success, -1 on failure
 860  */
 861 int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
 862 {
 863         struct wpa_driver_wext_data *drv = priv;
 864         struct iwreq iwr;
 865         int ret = 0, timeout;
 866         struct iw_scan_req req;
 867         const u8 *ssid = params->ssids[0].ssid;
 868         size_t ssid_len = params->ssids[0].ssid_len;
 869
 870         if (ssid_len > IW_ESSID_MAX_SIZE) {
 871                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
 872                            __FUNCTION__, (unsigned long) ssid_len);
 873                 return -1;
 874         }
 875
 876         os_memset(&iwr, 0, sizeof(iwr));
 877         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 878
 879         if (ssid && ssid_len) {
 880                 os_memset(&req, 0, sizeof(req));
 881                 req.essid_len = ssid_len;
 882                 req.bssid.sa_family = ARPHRD_ETHER;
 883                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
 884                 os_memcpy(req.essid, ssid, ssid_len);
 885                 iwr.u.data.pointer = (caddr_t) &req;
 886                 iwr.u.data.length = sizeof(req);
 887                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
 888         }
 889
 890         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
 891                 perror("ioctl[SIOCSIWSCAN]");
 892                 ret = -1;
 893         }
 894
 895         /* Not all drivers generate "scan completed" wireless event, so try to
 896          * read results after a timeout. */
 897         timeout = 5;
 898         if (drv->scan_complete_events) {
 899                 /*
 900                  * The driver seems to deliver SIOCGIWSCAN events to notify
 901                  * when scan is complete, so use longer timeout to avoid race
 902                  * conditions with scanning and following association request.
 903                  */
 904                 timeout = 30;
 905         }
 906         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
 907                    "seconds", ret, timeout);
 908         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
 909         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
 910                                drv->ctx);
 911
 912         return ret;
 913 }
 914
 915
 916 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
 917                                     size_t *len)
 918 {
 919         struct iwreq iwr;
 920         u8 *res_buf;
 921         size_t res_buf_len;
 922
 923         res_buf_len = IW_SCAN_MAX_DATA;
 924         for (;;) {
 925                 res_buf = os_malloc(res_buf_len);
 926                 if (res_buf == NULL)
 927                         return NULL;
 928                 os_memset(&iwr, 0, sizeof(iwr));
 929                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 930                 iwr.u.data.pointer = res_buf;
 931                 iwr.u.data.length = res_buf_len;
 932
 933                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
 934                         break;
 935
 936                 if (errno == E2BIG && res_buf_len < 65535) {
 937                         os_free(res_buf);
 938                         res_buf = NULL;
 939                         res_buf_len *= 2;
 940                         if (res_buf_len > 65535)
 941                                 res_buf_len = 65535; /* 16-bit length field */
 942                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
 943                                    "trying larger buffer (%lu bytes)",
 944                                    (unsigned long) res_buf_len);
 945                 } else {
 946                         perror("ioctl[SIOCGIWSCAN]");
 947                         os_free(res_buf);
 948                         return NULL;
 949                 }
 950         }
 951
 952         if (iwr.u.data.length > res_buf_len) {
 953                 os_free(res_buf);
 954                 return NULL;
 955         }
 956         *len = iwr.u.data.length;
 957
 958         return res_buf;
 959 }
 960
 961
 962 /*
 963  * Data structure for collecting WEXT scan results. This is needed to allow
 964  * the various methods of reporting IEs to be combined into a single IE buffer.
 965  */
 966 struct wext_scan_data {
 967         struct wpa_scan_res res;
 968         u8 *ie;
 969         size_t ie_len;
 970         u8 ssid[32];
 971         size_t ssid_len;
 972         int maxrate;
 973 };
 974
 975
 976 static void wext_get_scan_mode(struct iw_event *iwe,
 977                                struct wext_scan_data *res)
 978 {
 979         if (iwe->u.mode == IW_MODE_ADHOC)
 980                 res->res.caps |= IEEE80211_CAP_IBSS;
 981         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
 982                 res->res.caps |= IEEE80211_CAP_ESS;
 983 }
 984
 985
 986 static void wext_get_scan_ssid(struct iw_event *iwe,
 987                                struct wext_scan_data *res, char *custom,
 988                                char *end)
 989 {
 990         int ssid_len = iwe->u.essid.length;
 991         if (custom + ssid_len > end)
 992                 return;
 993         if (iwe->u.essid.flags &&
 994             ssid_len > 0 &&
 995             ssid_len <= IW_ESSID_MAX_SIZE) {
 996                 os_memcpy(res->ssid, custom, ssid_len);
 997                 res->ssid_len = ssid_len;
 998         }
 999 }
1000
1001
1002 static void wext_get_scan_freq(struct iw_event *iwe,
1003                                struct wext_scan_data *res)
1004 {
1005         int divi = 1000000, i;
1006
1007         if (iwe->u.freq.e == 0) {
1008                 /*
1009                  * Some drivers do not report frequency, but a channel.
1010                  * Try to map this to frequency by assuming they are using
1011                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1012                  * frequency if the driver sends both frequency and channel,
1013                  * since the driver may be sending an A-band channel that we
1014                  * don't handle here.
1015                  */
1016
1017                 if (res->res.freq)
1018                         return;
1019
1020                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1021                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1022                         return;
1023                 } else if (iwe->u.freq.m == 14) {
1024                         res->res.freq = 2484;
1025                         return;
1026                 }
1027         }
1028
1029         if (iwe->u.freq.e > 6) {
1030                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1031                            MACSTR " m=%d e=%d)",
1032                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1033                            iwe->u.freq.e);
1034                 return;
1035         }
1036
1037         for (i = 0; i < iwe->u.freq.e; i++)
1038                 divi /= 10;
1039         res->res.freq = iwe->u.freq.m / divi;
1040 }
1041
1042
1043 static void wext_get_scan_qual(struct iw_event *iwe,
1044                                struct wext_scan_data *res)
1045 {
1046         res->res.qual = iwe->u.qual.qual;
1047         res->res.noise = iwe->u.qual.noise;
1048         res->res.level = iwe->u.qual.level;
1049         if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
1050                 res->res.flags |= WPA_SCAN_QUAL_INVALID;
1051         if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
1052                 res->res.flags |= WPA_SCAN_LEVEL_INVALID;
1053         if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
1054                 res->res.flags |= WPA_SCAN_NOISE_INVALID;
1055         if (iwe->u.qual.updated & IW_QUAL_DBM)
1056                 res->res.flags |= WPA_SCAN_LEVEL_DBM;
1057 }
1058
1059
1060 static void wext_get_scan_encode(struct iw_event *iwe,
1061                                  struct wext_scan_data *res)
1062 {
1063         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1064                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1065 }
1066
1067
1068 static void wext_get_scan_rate(struct iw_event *iwe,
1069                                struct wext_scan_data *res, char *pos,
1070                                char *end)
1071 {
1072         int maxrate;
1073         char *custom = pos + IW_EV_LCP_LEN;
1074         struct iw_param p;
1075         size_t clen;
1076
1077         clen = iwe->len;
1078         if (custom + clen > end)
1079                 return;
1080         maxrate = 0;
1081         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1082                 /* Note: may be misaligned, make a local, aligned copy */
1083                 os_memcpy(&p, custom, sizeof(struct iw_param));
1084                 if (p.value > maxrate)
1085                         maxrate = p.value;
1086                 clen -= sizeof(struct iw_param);
1087                 custom += sizeof(struct iw_param);
1088         }
1089
1090         /* Convert the maxrate from WE-style (b/s units) to
1091          * 802.11 rates (500000 b/s units).
1092          */
1093         res->maxrate = maxrate / 500000;
1094 }
1095
1096
1097 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1098                                     struct wext_scan_data *res, char *custom,
1099                                     char *end)
1100 {
1101         char *genie, *gpos, *gend;
1102         u8 *tmp;
1103
1104         if (iwe->u.data.length == 0)
1105                 return;
1106
1107         gpos = genie = custom;
1108         gend = genie + iwe->u.data.length;
1109         if (gend > end) {
1110                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1111                 return;
1112         }
1113
1114         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1115         if (tmp == NULL)
1116                 return;
1117         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1118         res->ie = tmp;
1119         res->ie_len += gend - gpos;
1120 }
1121
1122
1123 static void wext_get_scan_custom(struct iw_event *iwe,
1124                                  struct wext_scan_data *res, char *custom,
1125                                  char *end)
1126 {
1127         size_t clen;
1128         u8 *tmp;
1129
1130         clen = iwe->u.data.length;
1131         if (custom + clen > end)
1132                 return;
1133
1134         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1135                 char *spos;
1136                 int bytes;
1137                 spos = custom + 7;
1138                 bytes = custom + clen - spos;
1139                 if (bytes & 1 || bytes == 0)
1140                         return;
1141                 bytes /= 2;
1142                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1143                 if (tmp == NULL)
1144                         return;
1145                 res->ie = tmp;
1146                 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1147                         return;
1148                 res->ie_len += bytes;
1149         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1150                 char *spos;
1151                 int bytes;
1152                 spos = custom + 7;
1153                 bytes = custom + clen - spos;
1154                 if (bytes & 1 || bytes == 0)
1155                         return;
1156                 bytes /= 2;
1157                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1158                 if (tmp == NULL)
1159                         return;
1160                 res->ie = tmp;
1161                 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1162                         return;
1163                 res->ie_len += bytes;
1164         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1165                 char *spos;
1166                 int bytes;
1167                 u8 bin[8];
1168                 spos = custom + 4;
1169                 bytes = custom + clen - spos;
1170                 if (bytes != 16) {
1171                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1172                         return;
1173                 }
1174                 bytes /= 2;
1175                 if (hexstr2bin(spos, bin, bytes) < 0) {
1176                         wpa_printf(MSG_DEBUG, "WEXT: Invalid TSF value");
1177                         return;
1178                 }
1179                 res->res.tsf += WPA_GET_BE64(bin);
1180         }
1181 }
1182
1183
1184 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1185 {
1186         return drv->we_version_compiled > 18 &&
1187                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1188                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1189 }
1190
1191
1192 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1193                                            struct wext_scan_data *data)
1194 {
1195         struct wpa_scan_res **tmp;
1196         struct wpa_scan_res *r;
1197         size_t extra_len;
1198         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1199
1200         /* Figure out whether we need to fake any IEs */
1201         pos = data->ie;
1202         end = pos + data->ie_len;
1203         while (pos && pos + 1 < end) {
1204                 if (pos + 2 + pos[1] > end)
1205                         break;
1206                 if (pos[0] == WLAN_EID_SSID)
1207                         ssid_ie = pos;
1208                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1209                         rate_ie = pos;
1210                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1211                         rate_ie = pos;
1212                 pos += 2 + pos[1];
1213         }
1214
1215         extra_len = 0;
1216         if (ssid_ie == NULL)
1217                 extra_len += 2 + data->ssid_len;
1218         if (rate_ie == NULL && data->maxrate)
1219                 extra_len += 3;
1220
1221         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1222         if (r == NULL)
1223                 return;
1224         os_memcpy(r, &data->res, sizeof(*r));
1225         r->ie_len = extra_len + data->ie_len;
1226         pos = (u8 *) (r + 1);
1227         if (ssid_ie == NULL) {
1228                 /*
1229                  * Generate a fake SSID IE since the driver did not report
1230                  * a full IE list.
1231                  */
1232                 *pos++ = WLAN_EID_SSID;
1233                 *pos++ = data->ssid_len;
1234                 os_memcpy(pos, data->ssid, data->ssid_len);
1235                 pos += data->ssid_len;
1236         }
1237         if (rate_ie == NULL && data->maxrate) {
1238                 /*
1239                  * Generate a fake Supported Rates IE since the driver did not
1240                  * report a full IE list.
1241                  */
1242                 *pos++ = WLAN_EID_SUPP_RATES;
1243                 *pos++ = 1;
1244                 *pos++ = data->maxrate;
1245         }
1246         if (data->ie)
1247                 os_memcpy(pos, data->ie, data->ie_len);
1248
1249         tmp = os_realloc(res->res,
1250                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1251         if (tmp == NULL) {
1252                 os_free(r);
1253                 return;
1254         }
1255         tmp[res->num++] = r;
1256         res->res = tmp;
1257 }
1258
1259
1260 /**
1261  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1262  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1263  * Returns: Scan results on success, -1 on failure
1264  */
1265 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1266 {
1267         struct wpa_driver_wext_data *drv = priv;
1268         size_t ap_num = 0, len;
1269         int first;
1270         u8 *res_buf;
1271         struct iw_event iwe_buf, *iwe = &iwe_buf;
1272         char *pos, *end, *custom;
1273         struct wpa_scan_results *res;
1274         struct wext_scan_data data;
1275
1276         res_buf = wpa_driver_wext_giwscan(drv, &len);
1277         if (res_buf == NULL)
1278                 return NULL;
1279
1280         ap_num = 0;
1281         first = 1;
1282
1283         res = os_zalloc(sizeof(*res));
1284         if (res == NULL) {
1285                 os_free(res_buf);
1286                 return NULL;
1287         }
1288
1289         pos = (char *) res_buf;
1290         end = (char *) res_buf + len;
1291         os_memset(&data, 0, sizeof(data));
1292
1293         while (pos + IW_EV_LCP_LEN <= end) {
1294                 /* Event data may be unaligned, so make a local, aligned copy
1295                  * before processing. */
1296                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1297                 if (iwe->len <= IW_EV_LCP_LEN)
1298                         break;
1299
1300                 custom = pos + IW_EV_POINT_LEN;
1301                 if (wext_19_iw_point(drv, iwe->cmd)) {
1302                         /* WE-19 removed the pointer from struct iw_point */
1303                         char *dpos = (char *) &iwe_buf.u.data.length;
1304                         int dlen = dpos - (char *) &iwe_buf;
1305                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1306                                   sizeof(struct iw_event) - dlen);
1307                 } else {
1308                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1309                         custom += IW_EV_POINT_OFF;
1310                 }
1311
1312                 switch (iwe->cmd) {
1313                 case SIOCGIWAP:
1314                         if (!first)
1315                                 wpa_driver_wext_add_scan_entry(res, &data);
1316                         first = 0;
1317                         os_free(data.ie);
1318                         os_memset(&data, 0, sizeof(data));
1319                         os_memcpy(data.res.bssid,
1320                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1321                         break;
1322                 case SIOCGIWMODE:
1323                         wext_get_scan_mode(iwe, &data);
1324                         break;
1325                 case SIOCGIWESSID:
1326                         wext_get_scan_ssid(iwe, &data, custom, end);
1327                         break;
1328                 case SIOCGIWFREQ:
1329                         wext_get_scan_freq(iwe, &data);
1330                         break;
1331                 case IWEVQUAL:
1332                         wext_get_scan_qual(iwe, &data);
1333                         break;
1334                 case SIOCGIWENCODE:
1335                         wext_get_scan_encode(iwe, &data);
1336                         break;
1337                 case SIOCGIWRATE:
1338                         wext_get_scan_rate(iwe, &data, pos, end);
1339                         break;
1340                 case IWEVGENIE:
1341                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1342                         break;
1343                 case IWEVCUSTOM:
1344                         wext_get_scan_custom(iwe, &data, custom, end);
1345                         break;
1346                 }
1347
1348                 pos += iwe->len;
1349         }
1350         os_free(res_buf);
1351         res_buf = NULL;
1352         if (!first)
1353                 wpa_driver_wext_add_scan_entry(res, &data);
1354         os_free(data.ie);
1355
1356         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1357                    (unsigned long) len, (unsigned long) res->num);
1358
1359         return res;
1360 }
1361
1362
1363 static int wpa_driver_wext_get_range(void *priv)
1364 {
1365         struct wpa_driver_wext_data *drv = priv;
1366         struct iw_range *range;
1367         struct iwreq iwr;
1368         int minlen;
1369         size_t buflen;
1370
1371         /*
1372          * Use larger buffer than struct iw_range in order to allow the
1373          * structure to grow in the future.
1374          */
1375         buflen = sizeof(struct iw_range) + 500;
1376         range = os_zalloc(buflen);
1377         if (range == NULL)
1378                 return -1;
1379
1380         os_memset(&iwr, 0, sizeof(iwr));
1381         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1382         iwr.u.data.pointer = (caddr_t) range;
1383         iwr.u.data.length = buflen;
1384
1385         minlen = ((char *) &range->enc_capa) - (char *) range +
1386                 sizeof(range->enc_capa);
1387
1388         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1389                 perror("ioctl[SIOCGIWRANGE]");
1390                 os_free(range);
1391                 return -1;
1392         } else if (iwr.u.data.length >= minlen &&
1393                    range->we_version_compiled >= 18) {
1394                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1395                            "WE(source)=%d enc_capa=0x%x",
1396                            range->we_version_compiled,
1397                            range->we_version_source,
1398                            range->enc_capa);
1399                 drv->has_capability = 1;
1400                 drv->we_version_compiled = range->we_version_compiled;
1401                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1402                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1403                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1404                 }
1405                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1406                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1407                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1408                 }
1409                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1410                         WPA_DRIVER_CAPA_ENC_WEP104;
1411                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1412                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1413                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1414                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1415                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1416                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1417                 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1418                         WPA_DRIVER_AUTH_SHARED |
1419                         WPA_DRIVER_AUTH_LEAP;
1420                 drv->capa.max_scan_ssids = 1;
1421
1422                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1423                            "flags 0x%x",
1424                            drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1425         } else {
1426                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1427                            "assuming WPA is not supported");
1428         }
1429
1430         os_free(range);
1431         return 0;
1432 }
1433
1434
1435 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1436                                    const u8 *psk)
1437 {
1438         struct iw_encode_ext *ext;
1439         struct iwreq iwr;
1440         int ret;
1441
1442         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1443
1444         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1445                 return 0;
1446
1447         if (!psk)
1448                 return 0;
1449
1450         os_memset(&iwr, 0, sizeof(iwr));
1451         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1452
1453         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1454         if (ext == NULL)
1455                 return -1;
1456
1457         iwr.u.encoding.pointer = (caddr_t) ext;
1458         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1459         ext->key_len = PMK_LEN;
1460         os_memcpy(&ext->key, psk, ext->key_len);
1461         ext->alg = IW_ENCODE_ALG_PMK;
1462
1463         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1464         if (ret < 0)
1465                 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1466         os_free(ext);
1467
1468         return ret;
1469 }
1470
1471
1472 static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg,
1473                                        const u8 *addr, int key_idx,
1474                                        int set_tx, const u8 *seq,
1475                                        size_t seq_len,
1476                                        const u8 *key, size_t key_len)
1477 {
1478         struct wpa_driver_wext_data *drv = priv;
1479         struct iwreq iwr;
1480         int ret = 0;
1481         struct iw_encode_ext *ext;
1482
1483         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1484                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1485                            __FUNCTION__, (unsigned long) seq_len);
1486                 return -1;
1487         }
1488
1489         ext = os_zalloc(sizeof(*ext) + key_len);
1490         if (ext == NULL)
1491                 return -1;
1492         os_memset(&iwr, 0, sizeof(iwr));
1493         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1494         iwr.u.encoding.flags = key_idx + 1;
1495         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1496         if (alg == WPA_ALG_NONE)
1497                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1498         iwr.u.encoding.pointer = (caddr_t) ext;
1499         iwr.u.encoding.length = sizeof(*ext) + key_len;
1500
1501         if (addr == NULL ||
1502             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1503                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1504         if (set_tx)
1505                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1506
1507         ext->addr.sa_family = ARPHRD_ETHER;
1508         if (addr)
1509                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1510         else
1511                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1512         if (key && key_len) {
1513                 os_memcpy(ext + 1, key, key_len);
1514                 ext->key_len = key_len;
1515         }
1516         switch (alg) {
1517         case WPA_ALG_NONE:
1518                 ext->alg = IW_ENCODE_ALG_NONE;
1519                 break;
1520         case WPA_ALG_WEP:
1521                 ext->alg = IW_ENCODE_ALG_WEP;
1522                 break;
1523         case WPA_ALG_TKIP:
1524                 ext->alg = IW_ENCODE_ALG_TKIP;
1525                 break;
1526         case WPA_ALG_CCMP:
1527                 ext->alg = IW_ENCODE_ALG_CCMP;
1528                 break;
1529         case WPA_ALG_PMK:
1530                 ext->alg = IW_ENCODE_ALG_PMK;
1531                 break;
1532 #ifdef CONFIG_IEEE80211W
1533         case WPA_ALG_IGTK:
1534                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1535                 break;
1536 #endif /* CONFIG_IEEE80211W */
1537         default:
1538                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1539                            __FUNCTION__, alg);
1540                 os_free(ext);
1541                 return -1;
1542         }
1543
1544         if (seq && seq_len) {
1545                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1546                 os_memcpy(ext->rx_seq, seq, seq_len);
1547         }
1548
1549         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1550                 ret = errno == EOPNOTSUPP ? -2 : -1;
1551                 if (errno == ENODEV) {
1552                         /*
1553                          * ndiswrapper seems to be returning incorrect error
1554                          * code.. */
1555                         ret = -2;
1556                 }
1557
1558                 perror("ioctl[SIOCSIWENCODEEXT]");
1559         }
1560
1561         os_free(ext);
1562         return ret;
1563 }
1564
1565
1566 /**
1567  * wpa_driver_wext_set_key - Configure encryption key
1568  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1569  * @priv: Private driver interface data
1570  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1571  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1572  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1573  *      broadcast/default keys
1574  * @key_idx: key index (0..3), usually 0 for unicast keys
1575  * @set_tx: Configure this key as the default Tx key (only used when
1576  *      driver does not support separate unicast/individual key
1577  * @seq: Sequence number/packet number, seq_len octets, the next
1578  *      packet number to be used for in replay protection; configured
1579  *      for Rx keys (in most cases, this is only used with broadcast
1580  *      keys and set to zero for unicast keys)
1581  * @seq_len: Length of the seq, depends on the algorithm:
1582  *      TKIP: 6 octets, CCMP: 6 octets
1583  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1584  *      8-byte Rx Mic Key
1585  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1586  *      TKIP: 32, CCMP: 16)
1587  * Returns: 0 on success, -1 on failure
1588  *
1589  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1590  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1591  */
1592 int wpa_driver_wext_set_key(const char *ifname, void *priv, enum wpa_alg alg,
1593                             const u8 *addr, int key_idx,
1594                             int set_tx, const u8 *seq, size_t seq_len,
1595                             const u8 *key, size_t key_len)
1596 {
1597         struct wpa_driver_wext_data *drv = priv;
1598         struct iwreq iwr;
1599         int ret = 0;
1600
1601         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1602                    "key_len=%lu",
1603                    __FUNCTION__, alg, key_idx, set_tx,
1604                    (unsigned long) seq_len, (unsigned long) key_len);
1605
1606         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1607                                           seq, seq_len, key, key_len);
1608         if (ret == 0)
1609                 return 0;
1610
1611         if (ret == -2 &&
1612             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1613                 wpa_printf(MSG_DEBUG, "Driver did not support "
1614                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1615                 ret = 0;
1616         } else {
1617                 wpa_printf(MSG_DEBUG, "Driver did not support "
1618                            "SIOCSIWENCODEEXT");
1619                 return ret;
1620         }
1621
1622         os_memset(&iwr, 0, sizeof(iwr));
1623         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1624         iwr.u.encoding.flags = key_idx + 1;
1625         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1626         if (alg == WPA_ALG_NONE)
1627                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1628         iwr.u.encoding.pointer = (caddr_t) key;
1629         iwr.u.encoding.length = key_len;
1630
1631         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1632                 perror("ioctl[SIOCSIWENCODE]");
1633                 ret = -1;
1634         }
1635
1636         if (set_tx && alg != WPA_ALG_NONE) {
1637                 os_memset(&iwr, 0, sizeof(iwr));
1638                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1639                 iwr.u.encoding.flags = key_idx + 1;
1640                 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1641                 iwr.u.encoding.pointer = (caddr_t) NULL;
1642                 iwr.u.encoding.length = 0;
1643                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1644                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1645                         ret = -1;
1646                 }
1647         }
1648
1649         return ret;
1650 }
1651
1652
1653 static int wpa_driver_wext_set_countermeasures(void *priv,
1654                                                int enabled)
1655 {
1656         struct wpa_driver_wext_data *drv = priv;
1657         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1658         return wpa_driver_wext_set_auth_param(drv,
1659                                               IW_AUTH_TKIP_COUNTERMEASURES,
1660                                               enabled);
1661 }
1662
1663
1664 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1665                                                 int enabled)
1666 {
1667         struct wpa_driver_wext_data *drv = priv;
1668         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1669         drv->use_crypt = enabled;
1670         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1671                                               enabled);
1672 }
1673
1674
1675 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1676                                 const u8 *addr, int cmd, int reason_code)
1677 {
1678         struct iwreq iwr;
1679         struct iw_mlme mlme;
1680         int ret = 0;
1681
1682         os_memset(&iwr, 0, sizeof(iwr));
1683         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1684         os_memset(&mlme, 0, sizeof(mlme));
1685         mlme.cmd = cmd;
1686         mlme.reason_code = reason_code;
1687         mlme.addr.sa_family = ARPHRD_ETHER;
1688         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1689         iwr.u.data.pointer = (caddr_t) &mlme;
1690         iwr.u.data.length = sizeof(mlme);
1691
1692         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1693                 perror("ioctl[SIOCSIWMLME]");
1694                 ret = -1;
1695         }
1696
1697         return ret;
1698 }
1699
1700
1701 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
1702 {
1703         struct iwreq iwr;
1704         const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
1705         u8 ssid[32];
1706         int i;
1707
1708         /*
1709          * Only force-disconnect when the card is in infrastructure mode,
1710          * otherwise the driver might interpret the cleared BSSID and random
1711          * SSID as an attempt to create a new ad-hoc network.
1712          */
1713         os_memset(&iwr, 0, sizeof(iwr));
1714         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1715         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
1716                 perror("ioctl[SIOCGIWMODE]");
1717                 iwr.u.mode = IW_MODE_INFRA;
1718         }
1719
1720         if (iwr.u.mode == IW_MODE_INFRA) {
1721                 if (drv->cfg80211) {
1722                         /*
1723                          * cfg80211 supports SIOCSIWMLME commands, so there is
1724                          * no need for the random SSID hack, but clear the
1725                          * BSSID and SSID.
1726                          */
1727                         if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0 ||
1728                             wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
1729                                 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear "
1730                                            "to disconnect");
1731                         }
1732                         return;
1733                 }
1734                 /*
1735                  * Clear the BSSID selection and set a random SSID to make sure
1736                  * the driver will not be trying to associate with something
1737                  * even if it does not understand SIOCSIWMLME commands (or
1738                  * tries to associate automatically after deauth/disassoc).
1739                  */
1740                 for (i = 0; i < 32; i++)
1741                         ssid[i] = rand() & 0xFF;
1742                 if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0 ||
1743                     wpa_driver_wext_set_ssid(drv, ssid, 32) < 0) {
1744                         wpa_printf(MSG_DEBUG, "WEXT: Failed to set bogus "
1745                                    "BSSID/SSID to disconnect");
1746                 }
1747         }
1748 }
1749
1750
1751 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1752                                           int reason_code)
1753 {
1754         struct wpa_driver_wext_data *drv = priv;
1755         int ret;
1756         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1757         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1758         wpa_driver_wext_disconnect(drv);
1759         return ret;
1760 }
1761
1762
1763 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
1764                                         int reason_code)
1765 {
1766         struct wpa_driver_wext_data *drv = priv;
1767         int ret;
1768         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1769         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC, reason_code);
1770         wpa_driver_wext_disconnect(drv);
1771         return ret;
1772 }
1773
1774
1775 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
1776                                       size_t ie_len)
1777 {
1778         struct wpa_driver_wext_data *drv = priv;
1779         struct iwreq iwr;
1780         int ret = 0;
1781
1782         os_memset(&iwr, 0, sizeof(iwr));
1783         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1784         iwr.u.data.pointer = (caddr_t) ie;
1785         iwr.u.data.length = ie_len;
1786
1787         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1788                 perror("ioctl[SIOCSIWGENIE]");
1789                 ret = -1;
1790         }
1791
1792         return ret;
1793 }
1794
1795
1796 int wpa_driver_wext_cipher2wext(int cipher)
1797 {
1798         switch (cipher) {
1799         case CIPHER_NONE:
1800                 return IW_AUTH_CIPHER_NONE;
1801         case CIPHER_WEP40:
1802                 return IW_AUTH_CIPHER_WEP40;
1803         case CIPHER_TKIP:
1804                 return IW_AUTH_CIPHER_TKIP;
1805         case CIPHER_CCMP:
1806                 return IW_AUTH_CIPHER_CCMP;
1807         case CIPHER_WEP104:
1808                 return IW_AUTH_CIPHER_WEP104;
1809         default:
1810                 return 0;
1811         }
1812 }
1813
1814
1815 int wpa_driver_wext_keymgmt2wext(int keymgmt)
1816 {
1817         switch (keymgmt) {
1818         case KEY_MGMT_802_1X:
1819         case KEY_MGMT_802_1X_NO_WPA:
1820                 return IW_AUTH_KEY_MGMT_802_1X;
1821         case KEY_MGMT_PSK:
1822                 return IW_AUTH_KEY_MGMT_PSK;
1823         default:
1824                 return 0;
1825         }
1826 }
1827
1828
1829 static int
1830 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
1831                                   struct wpa_driver_associate_params *params)
1832 {
1833         struct iwreq iwr;
1834         int ret = 0;
1835
1836         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1837                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1838
1839         os_memset(&iwr, 0, sizeof(iwr));
1840         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1841         /* Just changing mode, not actual keys */
1842         iwr.u.encoding.flags = 0;
1843         iwr.u.encoding.pointer = (caddr_t) NULL;
1844         iwr.u.encoding.length = 0;
1845
1846         /*
1847          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
1848          * different things. Here they are used to indicate Open System vs.
1849          * Shared Key authentication algorithm. However, some drivers may use
1850          * them to select between open/restricted WEP encrypted (open = allow
1851          * both unencrypted and encrypted frames; restricted = only allow
1852          * encrypted frames).
1853          */
1854
1855         if (!drv->use_crypt) {
1856                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1857         } else {
1858                 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
1859                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
1860                 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
1861                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
1862         }
1863
1864         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1865                 perror("ioctl[SIOCSIWENCODE]");
1866                 ret = -1;
1867         }
1868
1869         return ret;
1870 }
1871
1872
1873 int wpa_driver_wext_associate(void *priv,
1874                               struct wpa_driver_associate_params *params)
1875 {
1876         struct wpa_driver_wext_data *drv = priv;
1877         int ret = 0;
1878         int allow_unencrypted_eapol;
1879         int value;
1880
1881         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1882
1883         if (drv->cfg80211) {
1884                 /*
1885                  * Stop cfg80211 from trying to associate before we are done
1886                  * with all parameters.
1887                  */
1888                 wpa_driver_wext_set_ssid(drv, (u8 *) "", 0);
1889         }
1890
1891         if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
1892             < 0)
1893                 ret = -1;
1894         if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
1895                 ret = -1;
1896         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
1897                 ret = -1;
1898
1899         /*
1900          * If the driver did not support SIOCSIWAUTH, fallback to
1901          * SIOCSIWENCODE here.
1902          */
1903         if (drv->auth_alg_fallback &&
1904             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
1905                 ret = -1;
1906
1907         if (!params->bssid &&
1908             wpa_driver_wext_set_bssid(drv, NULL) < 0)
1909                 ret = -1;
1910
1911         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
1912          * from configuration, not from here, where only the selected suite is
1913          * available */
1914         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
1915             < 0)
1916                 ret = -1;
1917         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
1918                 value = IW_AUTH_WPA_VERSION_DISABLED;
1919         else if (params->wpa_ie[0] == WLAN_EID_RSN)
1920                 value = IW_AUTH_WPA_VERSION_WPA2;
1921         else
1922                 value = IW_AUTH_WPA_VERSION_WPA;
1923         if (wpa_driver_wext_set_auth_param(drv,
1924                                            IW_AUTH_WPA_VERSION, value) < 0)
1925                 ret = -1;
1926         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
1927         if (wpa_driver_wext_set_auth_param(drv,
1928                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
1929                 ret = -1;
1930         value = wpa_driver_wext_cipher2wext(params->group_suite);
1931         if (wpa_driver_wext_set_auth_param(drv,
1932                                            IW_AUTH_CIPHER_GROUP, value) < 0)
1933                 ret = -1;
1934         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
1935         if (wpa_driver_wext_set_auth_param(drv,
1936                                            IW_AUTH_KEY_MGMT, value) < 0)
1937                 ret = -1;
1938         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
1939                 params->pairwise_suite != CIPHER_NONE ||
1940                 params->group_suite != CIPHER_NONE ||
1941                 params->wpa_ie_len;
1942         if (wpa_driver_wext_set_auth_param(drv,
1943                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
1944                 ret = -1;
1945
1946         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
1947          * not using WPA. IEEE 802.1X specifies that these frames are not
1948          * encrypted, but WPA encrypts them when pairwise keys are in use. */
1949         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
1950             params->key_mgmt_suite == KEY_MGMT_PSK)
1951                 allow_unencrypted_eapol = 0;
1952         else
1953                 allow_unencrypted_eapol = 1;
1954
1955         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
1956                 ret = -1;
1957         if (wpa_driver_wext_set_auth_param(drv,
1958                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
1959                                            allow_unencrypted_eapol) < 0)
1960                 ret = -1;
1961 #ifdef CONFIG_IEEE80211W
1962         switch (params->mgmt_frame_protection) {
1963         case NO_MGMT_FRAME_PROTECTION:
1964                 value = IW_AUTH_MFP_DISABLED;
1965                 break;
1966         case MGMT_FRAME_PROTECTION_OPTIONAL:
1967                 value = IW_AUTH_MFP_OPTIONAL;
1968                 break;
1969         case MGMT_FRAME_PROTECTION_REQUIRED:
1970                 value = IW_AUTH_MFP_REQUIRED;
1971                 break;
1972         };
1973         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
1974                 ret = -1;
1975 #endif /* CONFIG_IEEE80211W */
1976         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
1977                 ret = -1;
1978         if (!drv->cfg80211 &&
1979             wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
1980                 ret = -1;
1981         if (params->bssid &&
1982             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
1983                 ret = -1;
1984         if (drv->cfg80211 &&
1985             wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
1986                 ret = -1;
1987
1988         return ret;
1989 }
1990
1991
1992 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
1993 {
1994         struct wpa_driver_wext_data *drv = priv;
1995         int algs = 0, res;
1996
1997         if (auth_alg & WPA_AUTH_ALG_OPEN)
1998                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
1999         if (auth_alg & WPA_AUTH_ALG_SHARED)
2000                 algs |= IW_AUTH_ALG_SHARED_KEY;
2001         if (auth_alg & WPA_AUTH_ALG_LEAP)
2002                 algs |= IW_AUTH_ALG_LEAP;
2003         if (algs == 0) {
2004                 /* at least one algorithm should be set */
2005                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2006         }
2007
2008         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2009                                              algs);
2010         drv->auth_alg_fallback = res == -2;
2011         return res;
2012 }
2013
2014
2015 /**
2016  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2017  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2018  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2019  * Returns: 0 on success, -1 on failure
2020  */
2021 int wpa_driver_wext_set_mode(void *priv, int mode)
2022 {
2023         struct wpa_driver_wext_data *drv = priv;
2024         struct iwreq iwr;
2025         int ret = -1;
2026         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2027
2028         os_memset(&iwr, 0, sizeof(iwr));
2029         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2030         iwr.u.mode = new_mode;
2031         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2032                 ret = 0;
2033                 goto done;
2034         }
2035
2036         if (errno != EBUSY) {
2037                 perror("ioctl[SIOCSIWMODE]");
2038                 goto done;
2039         }
2040
2041         /* mac80211 doesn't allow mode changes while the device is up, so if
2042          * the device isn't in the mode we're about to change to, take device
2043          * down, try to set the mode again, and bring it back up.
2044          */
2045         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2046                 perror("ioctl[SIOCGIWMODE]");
2047                 goto done;
2048         }
2049
2050         if (iwr.u.mode == new_mode) {
2051                 ret = 0;
2052                 goto done;
2053         }
2054
2055         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
2056                 /* Try to set the mode again while the interface is down */
2057                 iwr.u.mode = new_mode;
2058                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2059                         perror("ioctl[SIOCSIWMODE]");
2060                 else
2061                         ret = 0;
2062
2063                 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1);
2064         }
2065
2066 done:
2067         return ret;
2068 }
2069
2070
2071 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2072                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2073 {
2074         struct iwreq iwr;
2075         struct iw_pmksa pmksa;
2076         int ret = 0;
2077
2078         os_memset(&iwr, 0, sizeof(iwr));
2079         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2080         os_memset(&pmksa, 0, sizeof(pmksa));
2081         pmksa.cmd = cmd;
2082         pmksa.bssid.sa_family = ARPHRD_ETHER;
2083         if (bssid)
2084                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2085         if (pmkid)
2086                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2087         iwr.u.data.pointer = (caddr_t) &pmksa;
2088         iwr.u.data.length = sizeof(pmksa);
2089
2090         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2091                 if (errno != EOPNOTSUPP)
2092                         perror("ioctl[SIOCSIWPMKSA]");
2093                 ret = -1;
2094         }
2095
2096         return ret;
2097 }
2098
2099
2100 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2101                                      const u8 *pmkid)
2102 {
2103         struct wpa_driver_wext_data *drv = priv;
2104         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2105 }
2106
2107
2108 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2109                                         const u8 *pmkid)
2110 {
2111         struct wpa_driver_wext_data *drv = priv;
2112         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2113 }
2114
2115
2116 static int wpa_driver_wext_flush_pmkid(void *priv)
2117 {
2118         struct wpa_driver_wext_data *drv = priv;
2119         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2120 }
2121
2122
2123 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2124 {
2125         struct wpa_driver_wext_data *drv = priv;
2126         if (!drv->has_capability)
2127                 return -1;
2128         os_memcpy(capa, &drv->capa, sizeof(*capa));
2129         return 0;
2130 }
2131
2132
2133 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2134                                         const char *ifname)
2135 {
2136         if (ifname == NULL) {
2137                 drv->ifindex2 = -1;
2138                 return 0;
2139         }
2140
2141         drv->ifindex2 = if_nametoindex(ifname);
2142         if (drv->ifindex2 <= 0)
2143                 return -1;
2144
2145         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2146                    "wireless events", drv->ifindex2, ifname);
2147
2148         return 0;
2149 }
2150
2151
2152 int wpa_driver_wext_set_operstate(void *priv, int state)
2153 {
2154         struct wpa_driver_wext_data *drv = priv;
2155
2156         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2157                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2158         drv->operstate = state;
2159         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
2160                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
2161 }
2162
2163
2164 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2165 {
2166         return drv->we_version_compiled;
2167 }
2168
2169
2170 const struct wpa_driver_ops wpa_driver_wext_ops = {
2171         .name = "wext",
2172         .desc = "Linux wireless extensions (generic)",
2173         .get_bssid = wpa_driver_wext_get_bssid,
2174         .get_ssid = wpa_driver_wext_get_ssid,
2175         .set_key = wpa_driver_wext_set_key,
2176         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2177         .scan2 = wpa_driver_wext_scan,
2178         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2179         .deauthenticate = wpa_driver_wext_deauthenticate,
2180         .disassociate = wpa_driver_wext_disassociate,
2181         .associate = wpa_driver_wext_associate,
2182         .init = wpa_driver_wext_init,
2183         .deinit = wpa_driver_wext_deinit,
2184         .add_pmkid = wpa_driver_wext_add_pmkid,
2185         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2186         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2187         .get_capa = wpa_driver_wext_get_capa,
2188         .set_operstate = wpa_driver_wext_set_operstate,
2189 };