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 software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  *
   8  * This file implements a driver interface for the Linux Wireless Extensions.
   9  * When used with WE-18 or newer, this interface can be used as-is with number
  10  * of drivers. In addition to this, some of the common functions in this file
  11  * can be used by other driver interface implementations that use generic WE
  12  * ioctls, but require private ioctls for some of the functionality.
  13  */
  14
  15 #include "includes.h"
  16 #include <sys/ioctl.h>
  17 #include <sys/types.h>
  18 #include <sys/stat.h>
  19 #include <fcntl.h>
  20 #include <net/if_arp.h>
  21
  22 #include "linux_wext.h"
  23 #include "common.h"
  24 #include "eloop.h"
  25 #include "common/ieee802_11_defs.h"
  26 #include "common/wpa_common.h"
  27 #include "priv_netlink.h"
  28 #include "netlink.h"
  29 #include "linux_ioctl.h"
  30 #include "rfkill.h"
  31 #include "driver.h"
  32 #include "driver_wext.h"
  33
  34 #ifdef ANDROID
  35 #include "android_drv.h"
  36 #endif /* ANDROID */
  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 #ifdef ANDROID
 303         } else if (os_strncmp(custom, "STOP", 4) == 0) {
 304                 wpa_msg(ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STOPPED");
 305         } else if (os_strncmp(custom, "START", 5) == 0) {
 306                 wpa_msg(ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STARTED");
 307         } else if (os_strncmp(custom, "HANG", 4) == 0) {
 308                 wpa_msg(ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "HANGED");
 309 #endif /* ANDROID */
 310         }
 311 }
 312
 313
 314 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 315         void *ctx, const char *ev, size_t len)
 316 {
 317         const struct iw_michaelmicfailure *mic;
 318         union wpa_event_data data;
 319
 320         if (len < sizeof(*mic))
 321                 return -1;
 322
 323         mic = (const struct iw_michaelmicfailure *) ev;
 324
 325         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 326                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 327                    MAC2STR(mic->src_addr.sa_data));
 328
 329         os_memset(&data, 0, sizeof(data));
 330         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 331         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 332
 333         return 0;
 334 }
 335
 336
 337 static int wpa_driver_wext_event_wireless_pmkidcand(
 338         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 339 {
 340         const struct iw_pmkid_cand *cand;
 341         union wpa_event_data data;
 342         const u8 *addr;
 343
 344         if (len < sizeof(*cand))
 345                 return -1;
 346
 347         cand = (const struct iw_pmkid_cand *) ev;
 348         addr = (const u8 *) cand->bssid.sa_data;
 349
 350         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 351                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 352                    cand->index, MAC2STR(addr));
 353
 354         os_memset(&data, 0, sizeof(data));
 355         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 356         data.pmkid_candidate.index = cand->index;
 357         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 358         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 359
 360         return 0;
 361 }
 362
 363
 364 static int wpa_driver_wext_event_wireless_assocreqie(
 365         struct wpa_driver_wext_data *drv, const char *ev, int len)
 366 {
 367         if (len < 0)
 368                 return -1;
 369
 370         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 371                     len);
 372         os_free(drv->assoc_req_ies);
 373         drv->assoc_req_ies = os_malloc(len);
 374         if (drv->assoc_req_ies == NULL) {
 375                 drv->assoc_req_ies_len = 0;
 376                 return -1;
 377         }
 378         os_memcpy(drv->assoc_req_ies, ev, len);
 379         drv->assoc_req_ies_len = len;
 380
 381         return 0;
 382 }
 383
 384
 385 static int wpa_driver_wext_event_wireless_assocrespie(
 386         struct wpa_driver_wext_data *drv, const char *ev, int len)
 387 {
 388         if (len < 0)
 389                 return -1;
 390
 391         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 392                     len);
 393         os_free(drv->assoc_resp_ies);
 394         drv->assoc_resp_ies = os_malloc(len);
 395         if (drv->assoc_resp_ies == NULL) {
 396                 drv->assoc_resp_ies_len = 0;
 397                 return -1;
 398         }
 399         os_memcpy(drv->assoc_resp_ies, ev, len);
 400         drv->assoc_resp_ies_len = len;
 401
 402         return 0;
 403 }
 404
 405
 406 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 407 {
 408         union wpa_event_data data;
 409
 410         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 411                 return;
 412
 413         os_memset(&data, 0, sizeof(data));
 414         if (drv->assoc_req_ies) {
 415                 data.assoc_info.req_ies = drv->assoc_req_ies;
 416                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 417         }
 418         if (drv->assoc_resp_ies) {
 419                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 420                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 421         }
 422
 423         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 424
 425         os_free(drv->assoc_req_ies);
 426         drv->assoc_req_ies = NULL;
 427         os_free(drv->assoc_resp_ies);
 428         drv->assoc_resp_ies = NULL;
 429 }
 430
 431
 432 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 433                                            char *data, int len)
 434 {
 435         struct iw_event iwe_buf, *iwe = &iwe_buf;
 436         char *pos, *end, *custom, *buf;
 437
 438         pos = data;
 439         end = data + len;
 440
 441         while (pos + IW_EV_LCP_LEN <= end) {
 442                 /* Event data may be unaligned, so make a local, aligned copy
 443                  * before processing. */
 444                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 445                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 446                            iwe->cmd, iwe->len);
 447                 if (iwe->len <= IW_EV_LCP_LEN)
 448                         return;
 449
 450                 custom = pos + IW_EV_POINT_LEN;
 451                 if (drv->we_version_compiled > 18 &&
 452                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 453                      iwe->cmd == IWEVCUSTOM ||
 454                      iwe->cmd == IWEVASSOCREQIE ||
 455                      iwe->cmd == IWEVASSOCRESPIE ||
 456                      iwe->cmd == IWEVPMKIDCAND)) {
 457                         /* WE-19 removed the pointer from struct iw_point */
 458                         char *dpos = (char *) &iwe_buf.u.data.length;
 459                         int dlen = dpos - (char *) &iwe_buf;
 460                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 461                                   sizeof(struct iw_event) - dlen);
 462                 } else {
 463                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 464                         custom += IW_EV_POINT_OFF;
 465                 }
 466
 467                 switch (iwe->cmd) {
 468                 case SIOCGIWAP:
 469                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 470                                    MACSTR,
 471                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 472                         if (is_zero_ether_addr(
 473                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 474                             os_memcmp(iwe->u.ap_addr.sa_data,
 475                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 476                             0) {
 477                                 os_free(drv->assoc_req_ies);
 478                                 drv->assoc_req_ies = NULL;
 479                                 os_free(drv->assoc_resp_ies);
 480                                 drv->assoc_resp_ies = NULL;
 481                                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC,
 482                                                      NULL);
 483
 484                         } else {
 485                                 wpa_driver_wext_event_assoc_ies(drv);
 486                                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC,
 487                                                      NULL);
 488                         }
 489                         break;
 490                 case IWEVMICHAELMICFAILURE:
 491                         if (custom + iwe->u.data.length > end) {
 492                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 493                                            "IWEVMICHAELMICFAILURE length");
 494                                 return;
 495                         }
 496                         wpa_driver_wext_event_wireless_michaelmicfailure(
 497                                 drv->ctx, custom, iwe->u.data.length);
 498                         break;
 499                 case IWEVCUSTOM:
 500                         if (custom + iwe->u.data.length > end) {
 501                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 502                                            "IWEVCUSTOM length");
 503                                 return;
 504                         }
 505                         buf = os_malloc(iwe->u.data.length + 1);
 506                         if (buf == NULL)
 507                                 return;
 508                         os_memcpy(buf, custom, iwe->u.data.length);
 509                         buf[iwe->u.data.length] = '\0';
 510                         wpa_driver_wext_event_wireless_custom(drv->ctx, buf);
 511                         os_free(buf);
 512                         break;
 513                 case SIOCGIWSCAN:
 514                         drv->scan_complete_events = 1;
 515                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 516                                              drv, drv->ctx);
 517                         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS,
 518                                              NULL);
 519                         break;
 520                 case IWEVASSOCREQIE:
 521                         if (custom + iwe->u.data.length > end) {
 522                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 523                                            "IWEVASSOCREQIE length");
 524                                 return;
 525                         }
 526                         wpa_driver_wext_event_wireless_assocreqie(
 527                                 drv, custom, iwe->u.data.length);
 528                         break;
 529                 case IWEVASSOCRESPIE:
 530                         if (custom + iwe->u.data.length > end) {
 531                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 532                                            "IWEVASSOCRESPIE length");
 533                                 return;
 534                         }
 535                         wpa_driver_wext_event_wireless_assocrespie(
 536                                 drv, custom, iwe->u.data.length);
 537                         break;
 538                 case IWEVPMKIDCAND:
 539                         if (custom + iwe->u.data.length > end) {
 540                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 541                                            "IWEVPMKIDCAND length");
 542                                 return;
 543                         }
 544                         wpa_driver_wext_event_wireless_pmkidcand(
 545                                 drv, custom, iwe->u.data.length);
 546                         break;
 547                 }
 548
 549                 pos += iwe->len;
 550         }
 551 }
 552
 553
 554 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 555                                        char *buf, size_t len, int del)
 556 {
 557         union wpa_event_data event;
 558
 559         os_memset(&event, 0, sizeof(event));
 560         if (len > sizeof(event.interface_status.ifname))
 561                 len = sizeof(event.interface_status.ifname) - 1;
 562         os_memcpy(event.interface_status.ifname, buf, len);
 563         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 564                 EVENT_INTERFACE_ADDED;
 565
 566         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 567                    del ? "DEL" : "NEW",
 568                    event.interface_status.ifname,
 569                    del ? "removed" : "added");
 570
 571         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 572                 if (del)
 573                         drv->if_removed = 1;
 574                 else
 575                         drv->if_removed = 0;
 576         }
 577
 578         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 579 }
 580
 581
 582 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 583                                       u8 *buf, size_t len)
 584 {
 585         int attrlen, rta_len;
 586         struct rtattr *attr;
 587
 588         attrlen = len;
 589         attr = (struct rtattr *) buf;
 590
 591         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 592         while (RTA_OK(attr, attrlen)) {
 593                 if (attr->rta_type == IFLA_IFNAME) {
 594                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 595                             == 0)
 596                                 return 1;
 597                         else
 598                                 break;
 599                 }
 600                 attr = RTA_NEXT(attr, attrlen);
 601         }
 602
 603         return 0;
 604 }
 605
 606
 607 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 608                                        int ifindex, u8 *buf, size_t len)
 609 {
 610         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 611                 return 1;
 612
 613         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, buf, len)) {
 614                 drv->ifindex = if_nametoindex(drv->ifname);
 615                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 616                            "interface");
 617                 wpa_driver_wext_finish_drv_init(drv);
 618                 return 1;
 619         }
 620
 621         return 0;
 622 }
 623
 624
 625 static void wpa_driver_wext_event_rtm_newlink(void *ctx, struct ifinfomsg *ifi,
 626                                               u8 *buf, size_t len)
 627 {
 628         struct wpa_driver_wext_data *drv = ctx;
 629         int attrlen, rta_len;
 630         struct rtattr *attr;
 631
 632         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 633                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 634                            ifi->ifi_index);
 635                 return;
 636         }
 637
 638         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 639                    "(%s%s%s%s)",
 640                    drv->operstate, ifi->ifi_flags,
 641                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 642                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 643                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 644                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 645
 646         if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
 647                 wpa_printf(MSG_DEBUG, "WEXT: Interface down");
 648                 drv->if_disabled = 1;
 649                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
 650         }
 651
 652         if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
 653                 wpa_printf(MSG_DEBUG, "WEXT: Interface up");
 654                 drv->if_disabled = 0;
 655                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
 656         }
 657
 658         /*
 659          * Some drivers send the association event before the operup event--in
 660          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 661          * fails. This will hit us when wpa_supplicant does not need to do
 662          * IEEE 802.1X authentication
 663          */
 664         if (drv->operstate == 1 &&
 665             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 666             !(ifi->ifi_flags & IFF_RUNNING))
 667                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 668                                        -1, IF_OPER_UP);
 669
 670         attrlen = len;
 671         attr = (struct rtattr *) buf;
 672
 673         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 674         while (RTA_OK(attr, attrlen)) {
 675                 if (attr->rta_type == IFLA_WIRELESS) {
 676                         wpa_driver_wext_event_wireless(
 677                                 drv, ((char *) attr) + rta_len,
 678                                 attr->rta_len - rta_len);
 679                 } else if (attr->rta_type == IFLA_IFNAME) {
 680                         wpa_driver_wext_event_link(drv,
 681                                                    ((char *) attr) + rta_len,
 682                                                    attr->rta_len - rta_len, 0);
 683                 }
 684                 attr = RTA_NEXT(attr, attrlen);
 685         }
 686 }
 687
 688
 689 static void wpa_driver_wext_event_rtm_dellink(void *ctx, struct ifinfomsg *ifi,
 690                                               u8 *buf, size_t len)
 691 {
 692         struct wpa_driver_wext_data *drv = ctx;
 693         int attrlen, rta_len;
 694         struct rtattr *attr;
 695
 696         attrlen = len;
 697         attr = (struct rtattr *) buf;
 698
 699         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 700         while (RTA_OK(attr, attrlen)) {
 701                 if (attr->rta_type == IFLA_IFNAME) {
 702                         wpa_driver_wext_event_link(drv,
 703                                                    ((char *) attr) + rta_len,
 704                                                    attr->rta_len - rta_len, 1);
 705                 }
 706                 attr = RTA_NEXT(attr, attrlen);
 707         }
 708 }
 709
 710
 711 static void wpa_driver_wext_rfkill_blocked(void *ctx)
 712 {
 713         wpa_printf(MSG_DEBUG, "WEXT: RFKILL blocked");
 714         /*
 715          * This may be for any interface; use ifdown event to disable
 716          * interface.
 717          */
 718 }
 719
 720
 721 static void wpa_driver_wext_rfkill_unblocked(void *ctx)
 722 {
 723         struct wpa_driver_wext_data *drv = ctx;
 724         wpa_printf(MSG_DEBUG, "WEXT: RFKILL unblocked");
 725         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
 726                 wpa_printf(MSG_DEBUG, "WEXT: Could not set interface UP "
 727                            "after rfkill unblock");
 728                 return;
 729         }
 730         /* rtnetlink ifup handler will report interface as enabled */
 731 }
 732
 733
 734 static void wext_get_phy_name(struct wpa_driver_wext_data *drv)
 735 {
 736         /* Find phy (radio) to which this interface belongs */
 737         char buf[90], *pos;
 738         int f, rv;
 739
 740         drv->phyname[0] = '\0';
 741         snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
 742                  drv->ifname);
 743         f = open(buf, O_RDONLY);
 744         if (f < 0) {
 745                 wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
 746                            buf, strerror(errno));
 747                 return;
 748         }
 749
 750         rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
 751         close(f);
 752         if (rv < 0) {
 753                 wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
 754                            buf, strerror(errno));
 755                 return;
 756         }
 757
 758         drv->phyname[rv] = '\0';
 759         pos = os_strchr(drv->phyname, '\n');
 760         if (pos)
 761                 *pos = '\0';
 762         wpa_printf(MSG_DEBUG, "wext: interface %s phy: %s",
 763                    drv->ifname, drv->phyname);
 764 }
 765
 766
 767 /**
 768  * wpa_driver_wext_init - Initialize WE driver interface
 769  * @ctx: context to be used when calling wpa_supplicant functions,
 770  * e.g., wpa_supplicant_event()
 771  * @ifname: interface name, e.g., wlan0
 772  * Returns: Pointer to private data, %NULL on failure
 773  */
 774 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 775 {
 776         struct wpa_driver_wext_data *drv;
 777         struct netlink_config *cfg;
 778         struct rfkill_config *rcfg;
 779         char path[128];
 780         struct stat buf;
 781
 782         drv = os_zalloc(sizeof(*drv));
 783         if (drv == NULL)
 784                 return NULL;
 785         drv->ctx = ctx;
 786         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 787
 788         os_snprintf(path, sizeof(path), "/sys/class/net/%s/phy80211", ifname);
 789         if (stat(path, &buf) == 0) {
 790                 wpa_printf(MSG_DEBUG, "WEXT: cfg80211-based driver detected");
 791                 drv->cfg80211 = 1;
 792                 wext_get_phy_name(drv);
 793         }
 794
 795         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 796         if (drv->ioctl_sock < 0) {
 797                 perror("socket(PF_INET,SOCK_DGRAM)");
 798                 goto err1;
 799         }
 800
 801         cfg = os_zalloc(sizeof(*cfg));
 802         if (cfg == NULL)
 803                 goto err1;
 804         cfg->ctx = drv;
 805         cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink;
 806         cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink;
 807         drv->netlink = netlink_init(cfg);
 808         if (drv->netlink == NULL) {
 809                 os_free(cfg);
 810                 goto err2;
 811         }
 812
 813         rcfg = os_zalloc(sizeof(*rcfg));
 814         if (rcfg == NULL)
 815                 goto err3;
 816         rcfg->ctx = drv;
 817         os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
 818         rcfg->blocked_cb = wpa_driver_wext_rfkill_blocked;
 819         rcfg->unblocked_cb = wpa_driver_wext_rfkill_unblocked;
 820         drv->rfkill = rfkill_init(rcfg);
 821         if (drv->rfkill == NULL) {
 822                 wpa_printf(MSG_DEBUG, "WEXT: RFKILL status not available");
 823                 os_free(rcfg);
 824         }
 825
 826         drv->mlme_sock = -1;
 827
 828 #ifdef ANDROID
 829         drv->errors = 0;
 830         drv->driver_is_started = TRUE;
 831         drv->bgscan_enabled = 0;
 832 #endif /* ANDROID */
 833
 834         if (wpa_driver_wext_finish_drv_init(drv) < 0)
 835                 goto err3;
 836
 837         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1);
 838
 839         return drv;
 840
 841 err3:
 842         rfkill_deinit(drv->rfkill);
 843         netlink_deinit(drv->netlink);
 844 err2:
 845         close(drv->ioctl_sock);
 846 err1:
 847         os_free(drv);
 848         return NULL;
 849 }
 850
 851
 852 static void wpa_driver_wext_send_rfkill(void *eloop_ctx, void *timeout_ctx)
 853 {
 854         wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
 855 }
 856
 857
 858 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
 859 {
 860         int send_rfkill_event = 0;
 861
 862         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1) < 0) {
 863                 if (rfkill_is_blocked(drv->rfkill)) {
 864                         wpa_printf(MSG_DEBUG, "WEXT: Could not yet enable "
 865                                    "interface '%s' due to rfkill",
 866                                    drv->ifname);
 867                         drv->if_disabled = 1;
 868                         send_rfkill_event = 1;
 869                 } else {
 870                         wpa_printf(MSG_ERROR, "WEXT: Could not set "
 871                                    "interface '%s' UP", drv->ifname);
 872                         return -1;
 873                 }
 874         }
 875
 876         /*
 877          * Make sure that the driver does not have any obsolete PMKID entries.
 878          */
 879         wpa_driver_wext_flush_pmkid(drv);
 880
 881         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
 882                 wpa_printf(MSG_DEBUG, "Could not configure driver to use "
 883                            "managed mode");
 884                 /* Try to use it anyway */
 885         }
 886
 887         wpa_driver_wext_get_range(drv);
 888
 889         /*
 890          * Unlock the driver's BSSID and force to a random SSID to clear any
 891          * previous association the driver might have when the supplicant
 892          * starts up.
 893          */
 894         wpa_driver_wext_disconnect(drv);
 895
 896         drv->ifindex = if_nametoindex(drv->ifname);
 897
 898         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
 899                 /*
 900                  * Host AP driver may use both wlan# and wifi# interface in
 901                  * wireless events. Since some of the versions included WE-18
 902                  * support, let's add the alternative ifindex also from
 903                  * driver_wext.c for the time being. This may be removed at
 904                  * some point once it is believed that old versions of the
 905                  * driver are not in use anymore.
 906                  */
 907                 char ifname2[IFNAMSIZ + 1];
 908                 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
 909                 os_memcpy(ifname2, "wifi", 4);
 910                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
 911         }
 912
 913         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 914                                1, IF_OPER_DORMANT);
 915
 916         if (send_rfkill_event) {
 917                 eloop_register_timeout(0, 0, wpa_driver_wext_send_rfkill,
 918                                        drv, drv->ctx);
 919         }
 920
 921         return 0;
 922 }
 923
 924
 925 /**
 926  * wpa_driver_wext_deinit - Deinitialize WE driver interface
 927  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 928  *
 929  * Shut down driver interface and processing of driver events. Free
 930  * private data buffer if one was allocated in wpa_driver_wext_init().
 931  */
 932 void wpa_driver_wext_deinit(void *priv)
 933 {
 934         struct wpa_driver_wext_data *drv = priv;
 935
 936         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
 937
 938         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
 939
 940         /*
 941          * Clear possibly configured driver parameters in order to make it
 942          * easier to use the driver after wpa_supplicant has been terminated.
 943          */
 944         wpa_driver_wext_disconnect(drv);
 945
 946         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
 947         netlink_deinit(drv->netlink);
 948         rfkill_deinit(drv->rfkill);
 949
 950         if (drv->mlme_sock >= 0)
 951                 eloop_unregister_read_sock(drv->mlme_sock);
 952
 953         (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
 954
 955         close(drv->ioctl_sock);
 956         if (drv->mlme_sock >= 0)
 957                 close(drv->mlme_sock);
 958         os_free(drv->assoc_req_ies);
 959         os_free(drv->assoc_resp_ies);
 960         os_free(drv);
 961 }
 962
 963
 964 /**
 965  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
 966  * @eloop_ctx: Unused
 967  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
 968  *
 969  * This function can be used as registered timeout when starting a scan to
 970  * generate a scan completed event if the driver does not report this.
 971  */
 972 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 973 {
 974         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
 975         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
 976 }
 977
 978
 979 /**
 980  * wpa_driver_wext_scan - Request the driver to initiate scan
 981  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 982  * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
 983  * Returns: 0 on success, -1 on failure
 984  */
 985 int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
 986 {
 987         struct wpa_driver_wext_data *drv = priv;
 988         struct iwreq iwr;
 989         int ret = 0, timeout;
 990         struct iw_scan_req req;
 991         const u8 *ssid = params->ssids[0].ssid;
 992         size_t ssid_len = params->ssids[0].ssid_len;
 993
 994         if (ssid_len > IW_ESSID_MAX_SIZE) {
 995                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
 996                            __FUNCTION__, (unsigned long) ssid_len);
 997                 return -1;
 998         }
 999
1000         os_memset(&iwr, 0, sizeof(iwr));
1001         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1002
1003         if (ssid && ssid_len) {
1004                 os_memset(&req, 0, sizeof(req));
1005                 req.essid_len = ssid_len;
1006                 req.bssid.sa_family = ARPHRD_ETHER;
1007                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1008                 os_memcpy(req.essid, ssid, ssid_len);
1009                 iwr.u.data.pointer = (caddr_t) &req;
1010                 iwr.u.data.length = sizeof(req);
1011                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1012         }
1013
1014         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1015                 perror("ioctl[SIOCSIWSCAN]");
1016                 ret = -1;
1017         }
1018
1019         /* Not all drivers generate "scan completed" wireless event, so try to
1020          * read results after a timeout. */
1021         timeout = 10;
1022         if (drv->scan_complete_events) {
1023                 /*
1024                  * The driver seems to deliver SIOCGIWSCAN events to notify
1025                  * when scan is complete, so use longer timeout to avoid race
1026                  * conditions with scanning and following association request.
1027                  */
1028                 timeout = 30;
1029         }
1030         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1031                    "seconds", ret, timeout);
1032         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1033         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1034                                drv->ctx);
1035
1036         return ret;
1037 }
1038
1039
1040 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1041                                     size_t *len)
1042 {
1043         struct iwreq iwr;
1044         u8 *res_buf;
1045         size_t res_buf_len;
1046
1047         res_buf_len = IW_SCAN_MAX_DATA;
1048         for (;;) {
1049                 res_buf = os_malloc(res_buf_len);
1050                 if (res_buf == NULL)
1051                         return NULL;
1052                 os_memset(&iwr, 0, sizeof(iwr));
1053                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1054                 iwr.u.data.pointer = res_buf;
1055                 iwr.u.data.length = res_buf_len;
1056
1057                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1058                         break;
1059
1060                 if (errno == E2BIG && res_buf_len < 65535) {
1061                         os_free(res_buf);
1062                         res_buf = NULL;
1063                         res_buf_len *= 2;
1064                         if (res_buf_len > 65535)
1065                                 res_buf_len = 65535; /* 16-bit length field */
1066                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1067                                    "trying larger buffer (%lu bytes)",
1068                                    (unsigned long) res_buf_len);
1069                 } else {
1070                         perror("ioctl[SIOCGIWSCAN]");
1071                         os_free(res_buf);
1072                         return NULL;
1073                 }
1074         }
1075
1076         if (iwr.u.data.length > res_buf_len) {
1077                 os_free(res_buf);
1078                 return NULL;
1079         }
1080         *len = iwr.u.data.length;
1081
1082         return res_buf;
1083 }
1084
1085
1086 /*
1087  * Data structure for collecting WEXT scan results. This is needed to allow
1088  * the various methods of reporting IEs to be combined into a single IE buffer.
1089  */
1090 struct wext_scan_data {
1091         struct wpa_scan_res res;
1092         u8 *ie;
1093         size_t ie_len;
1094         u8 ssid[32];
1095         size_t ssid_len;
1096         int maxrate;
1097 };
1098
1099
1100 static void wext_get_scan_mode(struct iw_event *iwe,
1101                                struct wext_scan_data *res)
1102 {
1103         if (iwe->u.mode == IW_MODE_ADHOC)
1104                 res->res.caps |= IEEE80211_CAP_IBSS;
1105         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1106                 res->res.caps |= IEEE80211_CAP_ESS;
1107 }
1108
1109
1110 static void wext_get_scan_ssid(struct iw_event *iwe,
1111                                struct wext_scan_data *res, char *custom,
1112                                char *end)
1113 {
1114         int ssid_len = iwe->u.essid.length;
1115         if (custom + ssid_len > end)
1116                 return;
1117         if (iwe->u.essid.flags &&
1118             ssid_len > 0 &&
1119             ssid_len <= IW_ESSID_MAX_SIZE) {
1120                 os_memcpy(res->ssid, custom, ssid_len);
1121                 res->ssid_len = ssid_len;
1122         }
1123 }
1124
1125
1126 static void wext_get_scan_freq(struct iw_event *iwe,
1127                                struct wext_scan_data *res)
1128 {
1129         int divi = 1000000, i;
1130
1131         if (iwe->u.freq.e == 0) {
1132                 /*
1133                  * Some drivers do not report frequency, but a channel.
1134                  * Try to map this to frequency by assuming they are using
1135                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1136                  * frequency if the driver sends both frequency and channel,
1137                  * since the driver may be sending an A-band channel that we
1138                  * don't handle here.
1139                  */
1140
1141                 if (res->res.freq)
1142                         return;
1143
1144                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1145                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1146                         return;
1147                 } else if (iwe->u.freq.m == 14) {
1148                         res->res.freq = 2484;
1149                         return;
1150                 }
1151         }
1152
1153         if (iwe->u.freq.e > 6) {
1154                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1155                            MACSTR " m=%d e=%d)",
1156                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1157                            iwe->u.freq.e);
1158                 return;
1159         }
1160
1161         for (i = 0; i < iwe->u.freq.e; i++)
1162                 divi /= 10;
1163         res->res.freq = iwe->u.freq.m / divi;
1164 }
1165
1166
1167 static void wext_get_scan_qual(struct wpa_driver_wext_data *drv,
1168                                struct iw_event *iwe,
1169                                struct wext_scan_data *res)
1170 {
1171         res->res.qual = iwe->u.qual.qual;
1172         res->res.noise = iwe->u.qual.noise;
1173         res->res.level = iwe->u.qual.level;
1174         if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
1175                 res->res.flags |= WPA_SCAN_QUAL_INVALID;
1176         if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
1177                 res->res.flags |= WPA_SCAN_LEVEL_INVALID;
1178         if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
1179                 res->res.flags |= WPA_SCAN_NOISE_INVALID;
1180         if (iwe->u.qual.updated & IW_QUAL_DBM)
1181                 res->res.flags |= WPA_SCAN_LEVEL_DBM;
1182         if ((iwe->u.qual.updated & IW_QUAL_DBM) ||
1183             ((iwe->u.qual.level != 0) &&
1184              (iwe->u.qual.level > drv->max_level))) {
1185                 if (iwe->u.qual.level >= 64)
1186                         res->res.level -= 0x100;
1187                 if (iwe->u.qual.noise >= 64)
1188                         res->res.noise -= 0x100;
1189         }
1190 }
1191
1192
1193 static void wext_get_scan_encode(struct iw_event *iwe,
1194                                  struct wext_scan_data *res)
1195 {
1196         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1197                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1198 }
1199
1200
1201 static void wext_get_scan_rate(struct iw_event *iwe,
1202                                struct wext_scan_data *res, char *pos,
1203                                char *end)
1204 {
1205         int maxrate;
1206         char *custom = pos + IW_EV_LCP_LEN;
1207         struct iw_param p;
1208         size_t clen;
1209
1210         clen = iwe->len;
1211         if (custom + clen > end)
1212                 return;
1213         maxrate = 0;
1214         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1215                 /* Note: may be misaligned, make a local, aligned copy */
1216                 os_memcpy(&p, custom, sizeof(struct iw_param));
1217                 if (p.value > maxrate)
1218                         maxrate = p.value;
1219                 clen -= sizeof(struct iw_param);
1220                 custom += sizeof(struct iw_param);
1221         }
1222
1223         /* Convert the maxrate from WE-style (b/s units) to
1224          * 802.11 rates (500000 b/s units).
1225          */
1226         res->maxrate = maxrate / 500000;
1227 }
1228
1229
1230 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1231                                     struct wext_scan_data *res, char *custom,
1232                                     char *end)
1233 {
1234         char *genie, *gpos, *gend;
1235         u8 *tmp;
1236
1237         if (iwe->u.data.length == 0)
1238                 return;
1239
1240         gpos = genie = custom;
1241         gend = genie + iwe->u.data.length;
1242         if (gend > end) {
1243                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1244                 return;
1245         }
1246
1247         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1248         if (tmp == NULL)
1249                 return;
1250         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1251         res->ie = tmp;
1252         res->ie_len += gend - gpos;
1253 }
1254
1255
1256 static void wext_get_scan_custom(struct iw_event *iwe,
1257                                  struct wext_scan_data *res, char *custom,
1258                                  char *end)
1259 {
1260         size_t clen;
1261         u8 *tmp;
1262
1263         clen = iwe->u.data.length;
1264         if (custom + clen > end)
1265                 return;
1266
1267         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1268                 char *spos;
1269                 int bytes;
1270                 spos = custom + 7;
1271                 bytes = custom + clen - spos;
1272                 if (bytes & 1 || bytes == 0)
1273                         return;
1274                 bytes /= 2;
1275                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1276                 if (tmp == NULL)
1277                         return;
1278                 res->ie = tmp;
1279                 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1280                         return;
1281                 res->ie_len += bytes;
1282         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1283                 char *spos;
1284                 int bytes;
1285                 spos = custom + 7;
1286                 bytes = custom + clen - spos;
1287                 if (bytes & 1 || bytes == 0)
1288                         return;
1289                 bytes /= 2;
1290                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1291                 if (tmp == NULL)
1292                         return;
1293                 res->ie = tmp;
1294                 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1295                         return;
1296                 res->ie_len += bytes;
1297         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1298                 char *spos;
1299                 int bytes;
1300                 u8 bin[8];
1301                 spos = custom + 4;
1302                 bytes = custom + clen - spos;
1303                 if (bytes != 16) {
1304                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1305                         return;
1306                 }
1307                 bytes /= 2;
1308                 if (hexstr2bin(spos, bin, bytes) < 0) {
1309                         wpa_printf(MSG_DEBUG, "WEXT: Invalid TSF value");
1310                         return;
1311                 }
1312                 res->res.tsf += WPA_GET_BE64(bin);
1313         }
1314 }
1315
1316
1317 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1318 {
1319         return drv->we_version_compiled > 18 &&
1320                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1321                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1322 }
1323
1324
1325 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1326                                            struct wext_scan_data *data)
1327 {
1328         struct wpa_scan_res **tmp;
1329         struct wpa_scan_res *r;
1330         size_t extra_len;
1331         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1332
1333         /* Figure out whether we need to fake any IEs */
1334         pos = data->ie;
1335         end = pos + data->ie_len;
1336         while (pos && pos + 1 < end) {
1337                 if (pos + 2 + pos[1] > end)
1338                         break;
1339                 if (pos[0] == WLAN_EID_SSID)
1340                         ssid_ie = pos;
1341                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1342                         rate_ie = pos;
1343                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1344                         rate_ie = pos;
1345                 pos += 2 + pos[1];
1346         }
1347
1348         extra_len = 0;
1349         if (ssid_ie == NULL)
1350                 extra_len += 2 + data->ssid_len;
1351         if (rate_ie == NULL && data->maxrate)
1352                 extra_len += 3;
1353
1354         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1355         if (r == NULL)
1356                 return;
1357         os_memcpy(r, &data->res, sizeof(*r));
1358         r->ie_len = extra_len + data->ie_len;
1359         pos = (u8 *) (r + 1);
1360         if (ssid_ie == NULL) {
1361                 /*
1362                  * Generate a fake SSID IE since the driver did not report
1363                  * a full IE list.
1364                  */
1365                 *pos++ = WLAN_EID_SSID;
1366                 *pos++ = data->ssid_len;
1367                 os_memcpy(pos, data->ssid, data->ssid_len);
1368                 pos += data->ssid_len;
1369         }
1370         if (rate_ie == NULL && data->maxrate) {
1371                 /*
1372                  * Generate a fake Supported Rates IE since the driver did not
1373                  * report a full IE list.
1374                  */
1375                 *pos++ = WLAN_EID_SUPP_RATES;
1376                 *pos++ = 1;
1377                 *pos++ = data->maxrate;
1378         }
1379         if (data->ie)
1380                 os_memcpy(pos, data->ie, data->ie_len);
1381
1382         tmp = os_realloc(res->res,
1383                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1384         if (tmp == NULL) {
1385                 os_free(r);
1386                 return;
1387         }
1388         tmp[res->num++] = r;
1389         res->res = tmp;
1390 }
1391
1392
1393 /**
1394  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1395  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1396  * Returns: Scan results on success, -1 on failure
1397  */
1398 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1399 {
1400         struct wpa_driver_wext_data *drv = priv;
1401         size_t len;
1402         int first;
1403         u8 *res_buf;
1404         struct iw_event iwe_buf, *iwe = &iwe_buf;
1405         char *pos, *end, *custom;
1406         struct wpa_scan_results *res;
1407         struct wext_scan_data data;
1408
1409         res_buf = wpa_driver_wext_giwscan(drv, &len);
1410         if (res_buf == NULL)
1411                 return NULL;
1412
1413         first = 1;
1414
1415         res = os_zalloc(sizeof(*res));
1416         if (res == NULL) {
1417                 os_free(res_buf);
1418                 return NULL;
1419         }
1420
1421         pos = (char *) res_buf;
1422         end = (char *) res_buf + len;
1423         os_memset(&data, 0, sizeof(data));
1424
1425         while (pos + IW_EV_LCP_LEN <= end) {
1426                 /* Event data may be unaligned, so make a local, aligned copy
1427                  * before processing. */
1428                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1429                 if (iwe->len <= IW_EV_LCP_LEN)
1430                         break;
1431
1432                 custom = pos + IW_EV_POINT_LEN;
1433                 if (wext_19_iw_point(drv, iwe->cmd)) {
1434                         /* WE-19 removed the pointer from struct iw_point */
1435                         char *dpos = (char *) &iwe_buf.u.data.length;
1436                         int dlen = dpos - (char *) &iwe_buf;
1437                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1438                                   sizeof(struct iw_event) - dlen);
1439                 } else {
1440                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1441                         custom += IW_EV_POINT_OFF;
1442                 }
1443
1444                 switch (iwe->cmd) {
1445                 case SIOCGIWAP:
1446                         if (!first)
1447                                 wpa_driver_wext_add_scan_entry(res, &data);
1448                         first = 0;
1449                         os_free(data.ie);
1450                         os_memset(&data, 0, sizeof(data));
1451                         os_memcpy(data.res.bssid,
1452                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1453                         break;
1454                 case SIOCGIWMODE:
1455                         wext_get_scan_mode(iwe, &data);
1456                         break;
1457                 case SIOCGIWESSID:
1458                         wext_get_scan_ssid(iwe, &data, custom, end);
1459                         break;
1460                 case SIOCGIWFREQ:
1461                         wext_get_scan_freq(iwe, &data);
1462                         break;
1463                 case IWEVQUAL:
1464                         wext_get_scan_qual(drv, iwe, &data);
1465                         break;
1466                 case SIOCGIWENCODE:
1467                         wext_get_scan_encode(iwe, &data);
1468                         break;
1469                 case SIOCGIWRATE:
1470                         wext_get_scan_rate(iwe, &data, pos, end);
1471                         break;
1472                 case IWEVGENIE:
1473                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1474                         break;
1475                 case IWEVCUSTOM:
1476                         wext_get_scan_custom(iwe, &data, custom, end);
1477                         break;
1478                 }
1479
1480                 pos += iwe->len;
1481         }
1482         os_free(res_buf);
1483         res_buf = NULL;
1484         if (!first)
1485                 wpa_driver_wext_add_scan_entry(res, &data);
1486         os_free(data.ie);
1487
1488         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1489                    (unsigned long) len, (unsigned long) res->num);
1490
1491         return res;
1492 }
1493
1494
1495 static int wpa_driver_wext_get_range(void *priv)
1496 {
1497         struct wpa_driver_wext_data *drv = priv;
1498         struct iw_range *range;
1499         struct iwreq iwr;
1500         int minlen;
1501         size_t buflen;
1502
1503         /*
1504          * Use larger buffer than struct iw_range in order to allow the
1505          * structure to grow in the future.
1506          */
1507         buflen = sizeof(struct iw_range) + 500;
1508         range = os_zalloc(buflen);
1509         if (range == NULL)
1510                 return -1;
1511
1512         os_memset(&iwr, 0, sizeof(iwr));
1513         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1514         iwr.u.data.pointer = (caddr_t) range;
1515         iwr.u.data.length = buflen;
1516
1517         minlen = ((char *) &range->enc_capa) - (char *) range +
1518                 sizeof(range->enc_capa);
1519
1520         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1521                 perror("ioctl[SIOCGIWRANGE]");
1522                 os_free(range);
1523                 return -1;
1524         } else if (iwr.u.data.length >= minlen &&
1525                    range->we_version_compiled >= 18) {
1526                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1527                            "WE(source)=%d enc_capa=0x%x",
1528                            range->we_version_compiled,
1529                            range->we_version_source,
1530                            range->enc_capa);
1531                 drv->has_capability = 1;
1532                 drv->we_version_compiled = range->we_version_compiled;
1533                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1534                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1535                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1536                 }
1537                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1538                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1539                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1540                 }
1541                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1542                         WPA_DRIVER_CAPA_ENC_WEP104;
1543                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1544                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1545                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1546                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1547                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1548                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1549                 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1550                         WPA_DRIVER_AUTH_SHARED |
1551                         WPA_DRIVER_AUTH_LEAP;
1552                 drv->capa.max_scan_ssids = 1;
1553
1554                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1555                            "flags 0x%x",
1556                            drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1557         } else {
1558                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1559                            "assuming WPA is not supported");
1560         }
1561
1562         drv->max_level = range->max_qual.level;
1563
1564         os_free(range);
1565         return 0;
1566 }
1567
1568
1569 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1570                                    const u8 *psk)
1571 {
1572         struct iw_encode_ext *ext;
1573         struct iwreq iwr;
1574         int ret;
1575
1576         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1577
1578         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1579                 return 0;
1580
1581         if (!psk)
1582                 return 0;
1583
1584         os_memset(&iwr, 0, sizeof(iwr));
1585         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1586
1587         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1588         if (ext == NULL)
1589                 return -1;
1590
1591         iwr.u.encoding.pointer = (caddr_t) ext;
1592         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1593         ext->key_len = PMK_LEN;
1594         os_memcpy(&ext->key, psk, ext->key_len);
1595         ext->alg = IW_ENCODE_ALG_PMK;
1596
1597         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1598         if (ret < 0)
1599                 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1600         os_free(ext);
1601
1602         return ret;
1603 }
1604
1605
1606 static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg,
1607                                        const u8 *addr, int key_idx,
1608                                        int set_tx, const u8 *seq,
1609                                        size_t seq_len,
1610                                        const u8 *key, size_t key_len)
1611 {
1612         struct wpa_driver_wext_data *drv = priv;
1613         struct iwreq iwr;
1614         int ret = 0;
1615         struct iw_encode_ext *ext;
1616
1617         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1618                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1619                            __FUNCTION__, (unsigned long) seq_len);
1620                 return -1;
1621         }
1622
1623         ext = os_zalloc(sizeof(*ext) + key_len);
1624         if (ext == NULL)
1625                 return -1;
1626         os_memset(&iwr, 0, sizeof(iwr));
1627         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1628         iwr.u.encoding.flags = key_idx + 1;
1629         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1630         if (alg == WPA_ALG_NONE)
1631                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1632         iwr.u.encoding.pointer = (caddr_t) ext;
1633         iwr.u.encoding.length = sizeof(*ext) + key_len;
1634
1635         if (addr == NULL || is_broadcast_ether_addr(addr))
1636                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1637         if (set_tx)
1638                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1639
1640         ext->addr.sa_family = ARPHRD_ETHER;
1641         if (addr)
1642                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1643         else
1644                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1645         if (key && key_len) {
1646                 os_memcpy(ext + 1, key, key_len);
1647                 ext->key_len = key_len;
1648         }
1649         switch (alg) {
1650         case WPA_ALG_NONE:
1651                 ext->alg = IW_ENCODE_ALG_NONE;
1652                 break;
1653         case WPA_ALG_WEP:
1654                 ext->alg = IW_ENCODE_ALG_WEP;
1655                 break;
1656         case WPA_ALG_TKIP:
1657                 ext->alg = IW_ENCODE_ALG_TKIP;
1658                 break;
1659         case WPA_ALG_CCMP:
1660                 ext->alg = IW_ENCODE_ALG_CCMP;
1661                 break;
1662         case WPA_ALG_PMK:
1663                 ext->alg = IW_ENCODE_ALG_PMK;
1664                 break;
1665 #ifdef CONFIG_IEEE80211W
1666         case WPA_ALG_IGTK:
1667                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1668                 break;
1669 #endif /* CONFIG_IEEE80211W */
1670         default:
1671                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1672                            __FUNCTION__, alg);
1673                 os_free(ext);
1674                 return -1;
1675         }
1676
1677         if (seq && seq_len) {
1678                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1679                 os_memcpy(ext->rx_seq, seq, seq_len);
1680         }
1681
1682         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1683                 ret = errno == EOPNOTSUPP ? -2 : -1;
1684                 if (errno == ENODEV) {
1685                         /*
1686                          * ndiswrapper seems to be returning incorrect error
1687                          * code.. */
1688                         ret = -2;
1689                 }
1690
1691                 perror("ioctl[SIOCSIWENCODEEXT]");
1692         }
1693
1694         os_free(ext);
1695         return ret;
1696 }
1697
1698
1699 /**
1700  * wpa_driver_wext_set_key - Configure encryption key
1701  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1702  * @priv: Private driver interface data
1703  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1704  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1705  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1706  *      broadcast/default keys
1707  * @key_idx: key index (0..3), usually 0 for unicast keys
1708  * @set_tx: Configure this key as the default Tx key (only used when
1709  *      driver does not support separate unicast/individual key
1710  * @seq: Sequence number/packet number, seq_len octets, the next
1711  *      packet number to be used for in replay protection; configured
1712  *      for Rx keys (in most cases, this is only used with broadcast
1713  *      keys and set to zero for unicast keys)
1714  * @seq_len: Length of the seq, depends on the algorithm:
1715  *      TKIP: 6 octets, CCMP: 6 octets
1716  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1717  *      8-byte Rx Mic Key
1718  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1719  *      TKIP: 32, CCMP: 16)
1720  * Returns: 0 on success, -1 on failure
1721  *
1722  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1723  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1724  */
1725 int wpa_driver_wext_set_key(const char *ifname, void *priv, enum wpa_alg alg,
1726                             const u8 *addr, int key_idx,
1727                             int set_tx, const u8 *seq, size_t seq_len,
1728                             const u8 *key, size_t key_len)
1729 {
1730         struct wpa_driver_wext_data *drv = priv;
1731         struct iwreq iwr;
1732         int ret = 0;
1733
1734         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1735                    "key_len=%lu",
1736                    __FUNCTION__, alg, key_idx, set_tx,
1737                    (unsigned long) seq_len, (unsigned long) key_len);
1738
1739         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1740                                           seq, seq_len, key, key_len);
1741         if (ret == 0)
1742                 return 0;
1743
1744         if (ret == -2 &&
1745             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1746                 wpa_printf(MSG_DEBUG, "Driver did not support "
1747                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1748                 ret = 0;
1749         } else {
1750                 wpa_printf(MSG_DEBUG, "Driver did not support "
1751                            "SIOCSIWENCODEEXT");
1752                 return ret;
1753         }
1754
1755         os_memset(&iwr, 0, sizeof(iwr));
1756         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1757         iwr.u.encoding.flags = key_idx + 1;
1758         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1759         if (alg == WPA_ALG_NONE)
1760                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1761         iwr.u.encoding.pointer = (caddr_t) key;
1762         iwr.u.encoding.length = key_len;
1763
1764         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1765                 perror("ioctl[SIOCSIWENCODE]");
1766                 ret = -1;
1767         }
1768
1769         if (set_tx && alg != WPA_ALG_NONE) {
1770                 os_memset(&iwr, 0, sizeof(iwr));
1771                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1772                 iwr.u.encoding.flags = key_idx + 1;
1773                 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1774                 iwr.u.encoding.pointer = (caddr_t) NULL;
1775                 iwr.u.encoding.length = 0;
1776                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1777                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1778                         ret = -1;
1779                 }
1780         }
1781
1782         return ret;
1783 }
1784
1785
1786 static int wpa_driver_wext_set_countermeasures(void *priv,
1787                                                int enabled)
1788 {
1789         struct wpa_driver_wext_data *drv = priv;
1790         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1791         return wpa_driver_wext_set_auth_param(drv,
1792                                               IW_AUTH_TKIP_COUNTERMEASURES,
1793                                               enabled);
1794 }
1795
1796
1797 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1798                                                 int enabled)
1799 {
1800         struct wpa_driver_wext_data *drv = priv;
1801         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1802         drv->use_crypt = enabled;
1803         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1804                                               enabled);
1805 }
1806
1807
1808 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1809                                 const u8 *addr, int cmd, int reason_code)
1810 {
1811         struct iwreq iwr;
1812         struct iw_mlme mlme;
1813         int ret = 0;
1814
1815         os_memset(&iwr, 0, sizeof(iwr));
1816         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1817         os_memset(&mlme, 0, sizeof(mlme));
1818         mlme.cmd = cmd;
1819         mlme.reason_code = reason_code;
1820         mlme.addr.sa_family = ARPHRD_ETHER;
1821         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1822         iwr.u.data.pointer = (caddr_t) &mlme;
1823         iwr.u.data.length = sizeof(mlme);
1824
1825         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1826                 perror("ioctl[SIOCSIWMLME]");
1827                 ret = -1;
1828         }
1829
1830         return ret;
1831 }
1832
1833
1834 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
1835 {
1836         struct iwreq iwr;
1837         const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
1838 #ifndef ANDROID
1839         u8 ssid[32];
1840         int i;
1841 #endif /* ANDROID */
1842
1843         /*
1844          * Only force-disconnect when the card is in infrastructure mode,
1845          * otherwise the driver might interpret the cleared BSSID and random
1846          * SSID as an attempt to create a new ad-hoc network.
1847          */
1848         os_memset(&iwr, 0, sizeof(iwr));
1849         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1850         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
1851                 perror("ioctl[SIOCGIWMODE]");
1852                 iwr.u.mode = IW_MODE_INFRA;
1853         }
1854
1855         if (iwr.u.mode == IW_MODE_INFRA) {
1856                 /* Clear the BSSID selection */
1857                 if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0) {
1858                         wpa_printf(MSG_DEBUG, "WEXT: Failed to clear BSSID "
1859                                    "selection on disconnect");
1860                 }
1861
1862 #ifndef ANDROID
1863                 if (drv->cfg80211) {
1864                         /*
1865                          * cfg80211 supports SIOCSIWMLME commands, so there is
1866                          * no need for the random SSID hack, but clear the
1867                          * SSID.
1868                          */
1869                         if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
1870                                 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear "
1871                                            "SSID on disconnect");
1872                         }
1873                         return;
1874                 }
1875
1876                 /*
1877                  * Set a random SSID to make sure the driver will not be trying
1878                  * to associate with something even if it does not understand
1879                  * SIOCSIWMLME commands (or tries to associate automatically
1880                  * after deauth/disassoc).
1881                  */
1882                 for (i = 0; i < 32; i++)
1883                         ssid[i] = rand() & 0xFF;
1884                 if (wpa_driver_wext_set_ssid(drv, ssid, 32) < 0) {
1885                         wpa_printf(MSG_DEBUG, "WEXT: Failed to set bogus "
1886                                    "SSID to disconnect");
1887                 }
1888 #endif /* ANDROID */
1889         }
1890 }
1891
1892
1893 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1894                                           int reason_code)
1895 {
1896         struct wpa_driver_wext_data *drv = priv;
1897         int ret;
1898         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1899         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1900         wpa_driver_wext_disconnect(drv);
1901         return ret;
1902 }
1903
1904
1905 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
1906                                         int reason_code)
1907 {
1908         struct wpa_driver_wext_data *drv = priv;
1909         int ret;
1910         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1911         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC, reason_code);
1912         wpa_driver_wext_disconnect(drv);
1913         return ret;
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 & WPA_AUTH_ALG_OPEN)
2001                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2002                 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
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         if (drv->cfg80211) {
2026                 /*
2027                  * Stop cfg80211 from trying to associate before we are done
2028                  * with all parameters.
2029                  */
2030                 wpa_driver_wext_set_ssid(drv, (u8 *) "", 0);
2031         }
2032
2033         if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
2034             < 0)
2035                 ret = -1;
2036         if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
2037                 ret = -1;
2038         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2039                 ret = -1;
2040
2041         /*
2042          * If the driver did not support SIOCSIWAUTH, fallback to
2043          * SIOCSIWENCODE here.
2044          */
2045         if (drv->auth_alg_fallback &&
2046             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2047                 ret = -1;
2048
2049         if (!params->bssid &&
2050             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2051                 ret = -1;
2052
2053         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2054          * from configuration, not from here, where only the selected suite is
2055          * available */
2056         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2057             < 0)
2058                 ret = -1;
2059         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2060                 value = IW_AUTH_WPA_VERSION_DISABLED;
2061         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2062                 value = IW_AUTH_WPA_VERSION_WPA2;
2063         else
2064                 value = IW_AUTH_WPA_VERSION_WPA;
2065         if (wpa_driver_wext_set_auth_param(drv,
2066                                            IW_AUTH_WPA_VERSION, value) < 0)
2067                 ret = -1;
2068         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2069         if (wpa_driver_wext_set_auth_param(drv,
2070                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2071                 ret = -1;
2072         value = wpa_driver_wext_cipher2wext(params->group_suite);
2073         if (wpa_driver_wext_set_auth_param(drv,
2074                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2075                 ret = -1;
2076         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2077         if (wpa_driver_wext_set_auth_param(drv,
2078                                            IW_AUTH_KEY_MGMT, value) < 0)
2079                 ret = -1;
2080         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2081                 params->pairwise_suite != CIPHER_NONE ||
2082                 params->group_suite != CIPHER_NONE ||
2083                 params->wpa_ie_len;
2084         if (wpa_driver_wext_set_auth_param(drv,
2085                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2086                 ret = -1;
2087
2088         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2089          * not using WPA. IEEE 802.1X specifies that these frames are not
2090          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2091         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2092             params->key_mgmt_suite == KEY_MGMT_PSK)
2093                 allow_unencrypted_eapol = 0;
2094         else
2095                 allow_unencrypted_eapol = 1;
2096
2097         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2098                 ret = -1;
2099         if (wpa_driver_wext_set_auth_param(drv,
2100                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2101                                            allow_unencrypted_eapol) < 0)
2102                 ret = -1;
2103 #ifdef CONFIG_IEEE80211W
2104         switch (params->mgmt_frame_protection) {
2105         case NO_MGMT_FRAME_PROTECTION:
2106                 value = IW_AUTH_MFP_DISABLED;
2107                 break;
2108         case MGMT_FRAME_PROTECTION_OPTIONAL:
2109                 value = IW_AUTH_MFP_OPTIONAL;
2110                 break;
2111         case MGMT_FRAME_PROTECTION_REQUIRED:
2112                 value = IW_AUTH_MFP_REQUIRED;
2113                 break;
2114         };
2115         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2116                 ret = -1;
2117 #endif /* CONFIG_IEEE80211W */
2118         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2119                 ret = -1;
2120         if (!drv->cfg80211 &&
2121             wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2122                 ret = -1;
2123         if (params->bssid &&
2124             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2125                 ret = -1;
2126         if (drv->cfg80211 &&
2127             wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2128                 ret = -1;
2129
2130         return ret;
2131 }
2132
2133
2134 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2135 {
2136         struct wpa_driver_wext_data *drv = priv;
2137         int algs = 0, res;
2138
2139         if (auth_alg & WPA_AUTH_ALG_OPEN)
2140                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2141         if (auth_alg & WPA_AUTH_ALG_SHARED)
2142                 algs |= IW_AUTH_ALG_SHARED_KEY;
2143         if (auth_alg & WPA_AUTH_ALG_LEAP)
2144                 algs |= IW_AUTH_ALG_LEAP;
2145         if (algs == 0) {
2146                 /* at least one algorithm should be set */
2147                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2148         }
2149
2150         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2151                                              algs);
2152         drv->auth_alg_fallback = res == -2;
2153         return res;
2154 }
2155
2156
2157 /**
2158  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2159  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2160  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2161  * Returns: 0 on success, -1 on failure
2162  */
2163 int wpa_driver_wext_set_mode(void *priv, int mode)
2164 {
2165         struct wpa_driver_wext_data *drv = priv;
2166         struct iwreq iwr;
2167         int ret = -1;
2168         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2169
2170         os_memset(&iwr, 0, sizeof(iwr));
2171         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2172         iwr.u.mode = new_mode;
2173         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2174                 ret = 0;
2175                 goto done;
2176         }
2177
2178         if (errno != EBUSY) {
2179                 perror("ioctl[SIOCSIWMODE]");
2180                 goto done;
2181         }
2182
2183         /* mac80211 doesn't allow mode changes while the device is up, so if
2184          * the device isn't in the mode we're about to change to, take device
2185          * down, try to set the mode again, and bring it back up.
2186          */
2187         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2188                 perror("ioctl[SIOCGIWMODE]");
2189                 goto done;
2190         }
2191
2192         if (iwr.u.mode == new_mode) {
2193                 ret = 0;
2194                 goto done;
2195         }
2196
2197         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
2198                 /* Try to set the mode again while the interface is down */
2199                 iwr.u.mode = new_mode;
2200                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2201                         perror("ioctl[SIOCSIWMODE]");
2202                 else
2203                         ret = 0;
2204
2205                 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1);
2206         }
2207
2208 done:
2209         return ret;
2210 }
2211
2212
2213 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2214                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2215 {
2216         struct iwreq iwr;
2217         struct iw_pmksa pmksa;
2218         int ret = 0;
2219
2220         os_memset(&iwr, 0, sizeof(iwr));
2221         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2222         os_memset(&pmksa, 0, sizeof(pmksa));
2223         pmksa.cmd = cmd;
2224         pmksa.bssid.sa_family = ARPHRD_ETHER;
2225         if (bssid)
2226                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2227         if (pmkid)
2228                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2229         iwr.u.data.pointer = (caddr_t) &pmksa;
2230         iwr.u.data.length = sizeof(pmksa);
2231
2232         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2233                 if (errno != EOPNOTSUPP)
2234                         perror("ioctl[SIOCSIWPMKSA]");
2235                 ret = -1;
2236         }
2237
2238         return ret;
2239 }
2240
2241
2242 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2243                                      const u8 *pmkid)
2244 {
2245         struct wpa_driver_wext_data *drv = priv;
2246         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2247 }
2248
2249
2250 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2251                                         const u8 *pmkid)
2252 {
2253         struct wpa_driver_wext_data *drv = priv;
2254         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2255 }
2256
2257
2258 static int wpa_driver_wext_flush_pmkid(void *priv)
2259 {
2260         struct wpa_driver_wext_data *drv = priv;
2261         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2262 }
2263
2264
2265 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2266 {
2267         struct wpa_driver_wext_data *drv = priv;
2268         if (!drv->has_capability)
2269                 return -1;
2270         os_memcpy(capa, &drv->capa, sizeof(*capa));
2271         return 0;
2272 }
2273
2274
2275 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2276                                         const char *ifname)
2277 {
2278         if (ifname == NULL) {
2279                 drv->ifindex2 = -1;
2280                 return 0;
2281         }
2282
2283         drv->ifindex2 = if_nametoindex(ifname);
2284         if (drv->ifindex2 <= 0)
2285                 return -1;
2286
2287         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2288                    "wireless events", drv->ifindex2, ifname);
2289
2290         return 0;
2291 }
2292
2293
2294 int wpa_driver_wext_set_operstate(void *priv, int state)
2295 {
2296         struct wpa_driver_wext_data *drv = priv;
2297
2298         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2299                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2300         drv->operstate = state;
2301         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
2302                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
2303 }
2304
2305
2306 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2307 {
2308         return drv->we_version_compiled;
2309 }
2310
2311
2312 static const char * wext_get_radio_name(void *priv)
2313 {
2314         struct wpa_driver_wext_data *drv = priv;
2315         return drv->phyname;
2316 }
2317
2318
2319 #ifdef ANDROID
2320
2321 static int android_wext_cmd(struct wpa_driver_wext_data *drv, const char *cmd)
2322 {
2323         struct iwreq iwr;
2324         char buf[MAX_DRV_CMD_SIZE];
2325         int ret;
2326
2327         os_memset(&iwr, 0, sizeof(iwr));
2328         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2329
2330         os_memset(buf, 0, sizeof(buf));
2331         os_strlcpy(buf, cmd, sizeof(buf));
2332
2333         iwr.u.data.pointer = buf;
2334         iwr.u.data.length = sizeof(buf);
2335
2336         ret = ioctl(drv->ioctl_sock, SIOCSIWPRIV, &iwr);
2337
2338         if (ret < 0) {
2339                 wpa_printf(MSG_ERROR, "%s failed (%d): %s", __func__, ret,
2340                            cmd);
2341                 drv->errors++;
2342                 if (drv->errors > DRV_NUMBER_SEQUENTIAL_ERRORS) {
2343                         drv->errors = 0;
2344                         wpa_msg(drv->ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE
2345                                 "HANGED");
2346                 }
2347                 return ret;
2348         }
2349
2350         drv->errors = 0;
2351         return 0;
2352 }
2353
2354
2355 static int wext_sched_scan(void *priv, struct wpa_driver_scan_params *params,
2356                            u32 interval)
2357 {
2358         struct wpa_driver_wext_data *drv = priv;
2359         struct iwreq iwr;
2360         int ret = 0, i = 0, bp;
2361         char buf[WEXT_PNO_MAX_COMMAND_SIZE];
2362
2363         bp = WEXT_PNOSETUP_HEADER_SIZE;
2364         os_memcpy(buf, WEXT_PNOSETUP_HEADER, bp);
2365         buf[bp++] = WEXT_PNO_TLV_PREFIX;
2366         buf[bp++] = WEXT_PNO_TLV_VERSION;
2367         buf[bp++] = WEXT_PNO_TLV_SUBVERSION;
2368         buf[bp++] = WEXT_PNO_TLV_RESERVED;
2369
2370         while (i < WEXT_PNO_AMOUNT && (size_t) i < params->num_ssids) {
2371                 /*
2372                  * Check that there is enough space needed for 1 more SSID, the
2373                  * other sections and null termination.
2374                  */
2375                 if ((bp + WEXT_PNO_SSID_HEADER_SIZE + IW_ESSID_MAX_SIZE +
2376                      WEXT_PNO_NONSSID_SECTIONS_SIZE + 1) >= (int) sizeof(buf))
2377                         break;
2378
2379                 wpa_hexdump_ascii(MSG_DEBUG, "For PNO Scan",
2380                                   params->ssids[i].ssid,
2381                                   params->ssids[i].ssid_len);
2382                 buf[bp++] = WEXT_PNO_SSID_SECTION;
2383                 buf[bp++] = params->ssids[i].ssid_len;
2384                 os_memcpy(&buf[bp], params->ssids[i].ssid,
2385                           params->ssids[i].ssid_len);
2386                 bp += params->ssids[i].ssid_len;
2387                 i++;
2388         }
2389
2390         buf[bp++] = WEXT_PNO_SCAN_INTERVAL_SECTION;
2391         /* TODO: consider using interval parameter (interval in msec) instead
2392          * of hardcoded value here */
2393         os_snprintf(&buf[bp], WEXT_PNO_SCAN_INTERVAL_LENGTH + 1, "%x",
2394                     WEXT_PNO_SCAN_INTERVAL);
2395         bp += WEXT_PNO_SCAN_INTERVAL_LENGTH;
2396
2397         buf[bp++] = WEXT_PNO_REPEAT_SECTION;
2398         os_snprintf(&buf[bp], WEXT_PNO_REPEAT_LENGTH + 1, "%x",
2399                     WEXT_PNO_REPEAT);
2400         bp += WEXT_PNO_REPEAT_LENGTH;
2401
2402         buf[bp++] = WEXT_PNO_MAX_REPEAT_SECTION;
2403         os_snprintf(&buf[bp], WEXT_PNO_MAX_REPEAT_LENGTH + 1, "%x",
2404                     WEXT_PNO_MAX_REPEAT);
2405         bp += WEXT_PNO_MAX_REPEAT_LENGTH + 1;
2406
2407         os_memset(&iwr, 0, sizeof(iwr));
2408         os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2409         iwr.u.data.pointer = buf;
2410         iwr.u.data.length = bp;
2411
2412         ret = ioctl(drv->ioctl_sock, SIOCSIWPRIV, &iwr);
2413         if (ret < 0) {
2414                 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWPRIV] (pnosetup): %d",
2415                            ret);
2416                 drv->errors++;
2417                 if (drv->errors > DRV_NUMBER_SEQUENTIAL_ERRORS) {
2418                         drv->errors = 0;
2419                         wpa_msg(drv->ctx, MSG_INFO,
2420                                 WPA_EVENT_DRIVER_STATE "HANGED");
2421                 }
2422                 return ret;
2423         }
2424
2425         drv->errors = 0;
2426         drv->bgscan_enabled = 1;
2427
2428         return android_wext_cmd(drv, "PNOFORCE 1");
2429 }
2430
2431
2432 static int wext_stop_sched_scan(void *priv)
2433 {
2434         struct wpa_driver_wext_data *drv = priv;
2435         drv->bgscan_enabled = 0;
2436         return android_wext_cmd(drv, "PNOFORCE 0");
2437 }
2438
2439 #endif /* ANDROID */
2440
2441
2442 const struct wpa_driver_ops wpa_driver_wext_ops = {
2443         .name = "wext",
2444         .desc = "Linux wireless extensions (generic)",
2445         .get_bssid = wpa_driver_wext_get_bssid,
2446         .get_ssid = wpa_driver_wext_get_ssid,
2447         .set_key = wpa_driver_wext_set_key,
2448         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2449         .scan2 = wpa_driver_wext_scan,
2450         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2451         .deauthenticate = wpa_driver_wext_deauthenticate,
2452         .disassociate = wpa_driver_wext_disassociate,
2453         .associate = wpa_driver_wext_associate,
2454         .init = wpa_driver_wext_init,
2455         .deinit = wpa_driver_wext_deinit,
2456         .add_pmkid = wpa_driver_wext_add_pmkid,
2457         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2458         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2459         .get_capa = wpa_driver_wext_get_capa,
2460         .set_operstate = wpa_driver_wext_set_operstate,
2461         .get_radio_name = wext_get_radio_name,
2462 #ifdef ANDROID
2463         .sched_scan = wext_sched_scan,
2464         .stop_sched_scan = wext_stop_sched_scan,
2465 #endif /* ANDROID */
2466 };