src/drivers/driver_wext.c

   1 /*
   2  * Driver interaction with generic Linux Wireless Extensions
   3  * Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements a driver interface for the Linux Wireless Extensions.
  15  * When used with WE-18 or newer, this interface can be used as-is with number
  16  * of drivers. In addition to this, some of the common functions in this file
  17  * can be used by other driver interface implementations that use generic WE
  18  * ioctls, but require private ioctls for some of the functionality.
  19  */
  20
  21 #include "includes.h"
  22 #include <sys/ioctl.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <fcntl.h>
  26 #include <net/if_arp.h>
  27
  28 #include "wireless_copy.h"
  29 #include "common.h"
  30 #include "eloop.h"
  31 #include "common/ieee802_11_defs.h"
  32 #include "common/wpa_common.h"
  33 #include "priv_netlink.h"
  34 #include "netlink.h"
  35 #include "linux_ioctl.h"
  36 #include "rfkill.h"
  37 #include "driver.h"
  38 #include "driver_wext.h"
  39
  40
  41 static int wpa_driver_wext_flush_pmkid(void *priv);
  42 static int wpa_driver_wext_get_range(void *priv);
  43 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
  44 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv);
  45 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg);
  46
  47
  48 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
  49                                    int idx, u32 value)
  50 {
  51         struct iwreq iwr;
  52         int ret = 0;
  53
  54         os_memset(&iwr, 0, sizeof(iwr));
  55         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
  56         iwr.u.param.flags = idx & IW_AUTH_INDEX;
  57         iwr.u.param.value = value;
  58
  59         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
  60                 if (errno != EOPNOTSUPP) {
  61                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
  62                                    "value 0x%x) failed: %s)",
  63                                    idx, value, strerror(errno));
  64                 }
  65                 ret = errno == EOPNOTSUPP ? -2 : -1;
  66         }
  67
  68         return ret;
  69 }
  70
  71
  72 /**
  73  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
  74  * @priv: Pointer to private wext data from wpa_driver_wext_init()
  75  * @bssid: Buffer for BSSID
  76  * Returns: 0 on success, -1 on failure
  77  */
  78 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
  79 {
  80         struct wpa_driver_wext_data *drv = priv;
  81         struct iwreq iwr;
  82         int ret = 0;
  83
  84         os_memset(&iwr, 0, sizeof(iwr));
  85         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
  86
  87         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
  88                 perror("ioctl[SIOCGIWAP]");
  89                 ret = -1;
  90         }
  91         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
  92
  93         return ret;
  94 }
  95
  96
  97 /**
  98  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
  99  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 100  * @bssid: BSSID
 101  * Returns: 0 on success, -1 on failure
 102  */
 103 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
 104 {
 105         struct wpa_driver_wext_data *drv = priv;
 106         struct iwreq iwr;
 107         int ret = 0;
 108
 109         os_memset(&iwr, 0, sizeof(iwr));
 110         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 111         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 112         if (bssid)
 113                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 114         else
 115                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 116
 117         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 118                 perror("ioctl[SIOCSIWAP]");
 119                 ret = -1;
 120         }
 121
 122         return ret;
 123 }
 124
 125
 126 /**
 127  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 128  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 129  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 130  * Returns: SSID length on success, -1 on failure
 131  */
 132 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 133 {
 134         struct wpa_driver_wext_data *drv = priv;
 135         struct iwreq iwr;
 136         int ret = 0;
 137
 138         os_memset(&iwr, 0, sizeof(iwr));
 139         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 140         iwr.u.essid.pointer = (caddr_t) ssid;
 141         iwr.u.essid.length = 32;
 142
 143         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 144                 perror("ioctl[SIOCGIWESSID]");
 145                 ret = -1;
 146         } else {
 147                 ret = iwr.u.essid.length;
 148                 if (ret > 32)
 149                         ret = 32;
 150                 /* Some drivers include nul termination in the SSID, so let's
 151                  * remove it here before further processing. WE-21 changes this
 152                  * to explicitly require the length _not_ to include nul
 153                  * termination. */
 154                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 155                     drv->we_version_compiled < 21)
 156                         ret--;
 157         }
 158
 159         return ret;
 160 }
 161
 162
 163 /**
 164  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 165  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 166  * @ssid: SSID
 167  * @ssid_len: Length of SSID (0..32)
 168  * Returns: 0 on success, -1 on failure
 169  */
 170 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 171 {
 172         struct wpa_driver_wext_data *drv = priv;
 173         struct iwreq iwr;
 174         int ret = 0;
 175         char buf[33];
 176
 177         if (ssid_len > 32)
 178                 return -1;
 179
 180         os_memset(&iwr, 0, sizeof(iwr));
 181         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 182         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 183         iwr.u.essid.flags = (ssid_len != 0);
 184         os_memset(buf, 0, sizeof(buf));
 185         os_memcpy(buf, ssid, ssid_len);
 186         iwr.u.essid.pointer = (caddr_t) buf;
 187         if (drv->we_version_compiled < 21) {
 188                 /* For historic reasons, set SSID length to include one extra
 189                  * character, C string nul termination, even though SSID is
 190                  * really an octet string that should not be presented as a C
 191                  * string. Some Linux drivers decrement the length by one and
 192                  * can thus end up missing the last octet of the SSID if the
 193                  * length is not incremented here. WE-21 changes this to
 194                  * explicitly require the length _not_ to include nul
 195                  * termination. */
 196                 if (ssid_len)
 197                         ssid_len++;
 198         }
 199         iwr.u.essid.length = ssid_len;
 200
 201         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 202                 perror("ioctl[SIOCSIWESSID]");
 203                 ret = -1;
 204         }
 205
 206         return ret;
 207 }
 208
 209
 210 /**
 211  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 212  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 213  * @freq: Frequency in MHz
 214  * Returns: 0 on success, -1 on failure
 215  */
 216 int wpa_driver_wext_set_freq(void *priv, int freq)
 217 {
 218         struct wpa_driver_wext_data *drv = priv;
 219         struct iwreq iwr;
 220         int ret = 0;
 221
 222         os_memset(&iwr, 0, sizeof(iwr));
 223         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 224         iwr.u.freq.m = freq * 100000;
 225         iwr.u.freq.e = 1;
 226
 227         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 228                 perror("ioctl[SIOCSIWFREQ]");
 229                 ret = -1;
 230         }
 231
 232         return ret;
 233 }
 234
 235
 236 static void
 237 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 238 {
 239         union wpa_event_data data;
 240
 241         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 242                    custom);
 243
 244         os_memset(&data, 0, sizeof(data));
 245         /* Host AP driver */
 246         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 247                 data.michael_mic_failure.unicast =
 248                         os_strstr(custom, " unicast ") != NULL;
 249                 /* TODO: parse parameters(?) */
 250                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 251         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 252                 char *spos;
 253                 int bytes;
 254                 u8 *req_ies = NULL, *resp_ies = NULL;
 255
 256                 spos = custom + 17;
 257
 258                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 259                 if (!bytes || (bytes & 1))
 260                         return;
 261                 bytes /= 2;
 262
 263                 req_ies = os_malloc(bytes);
 264                 if (req_ies == NULL ||
 265                     hexstr2bin(spos, req_ies, bytes) < 0)
 266                         goto done;
 267                 data.assoc_info.req_ies = req_ies;
 268                 data.assoc_info.req_ies_len = bytes;
 269
 270                 spos += bytes * 2;
 271
 272                 data.assoc_info.resp_ies = NULL;
 273                 data.assoc_info.resp_ies_len = 0;
 274
 275                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 276                         spos += 9;
 277
 278                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 279                         if (!bytes || (bytes & 1))
 280                                 goto done;
 281                         bytes /= 2;
 282
 283                         resp_ies = os_malloc(bytes);
 284                         if (resp_ies == NULL ||
 285                             hexstr2bin(spos, resp_ies, bytes) < 0)
 286                                 goto done;
 287                         data.assoc_info.resp_ies = resp_ies;
 288                         data.assoc_info.resp_ies_len = bytes;
 289                 }
 290
 291                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 292
 293         done:
 294                 os_free(resp_ies);
 295                 os_free(req_ies);
 296 #ifdef CONFIG_PEERKEY
 297         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 298                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 299                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 300                                    "STKSTART.request '%s'", custom + 17);
 301                         return;
 302                 }
 303                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 304 #endif /* CONFIG_PEERKEY */
 305         }
 306 }
 307
 308
 309 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 310         void *ctx, const char *ev, size_t len)
 311 {
 312         const struct iw_michaelmicfailure *mic;
 313         union wpa_event_data data;
 314
 315         if (len < sizeof(*mic))
 316                 return -1;
 317
 318         mic = (const struct iw_michaelmicfailure *) ev;
 319
 320         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 321                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 322                    MAC2STR(mic->src_addr.sa_data));
 323
 324         os_memset(&data, 0, sizeof(data));
 325         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 326         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 327
 328         return 0;
 329 }
 330
 331
 332 static int wpa_driver_wext_event_wireless_pmkidcand(
 333         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 334 {
 335         const struct iw_pmkid_cand *cand;
 336         union wpa_event_data data;
 337         const u8 *addr;
 338
 339         if (len < sizeof(*cand))
 340                 return -1;
 341
 342         cand = (const struct iw_pmkid_cand *) ev;
 343         addr = (const u8 *) cand->bssid.sa_data;
 344
 345         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 346                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 347                    cand->index, MAC2STR(addr));
 348
 349         os_memset(&data, 0, sizeof(data));
 350         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 351         data.pmkid_candidate.index = cand->index;
 352         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 353         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 354
 355         return 0;
 356 }
 357
 358
 359 static int wpa_driver_wext_event_wireless_assocreqie(
 360         struct wpa_driver_wext_data *drv, const char *ev, int len)
 361 {
 362         if (len < 0)
 363                 return -1;
 364
 365         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 366                     len);
 367         os_free(drv->assoc_req_ies);
 368         drv->assoc_req_ies = os_malloc(len);
 369         if (drv->assoc_req_ies == NULL) {
 370                 drv->assoc_req_ies_len = 0;
 371                 return -1;
 372         }
 373         os_memcpy(drv->assoc_req_ies, ev, len);
 374         drv->assoc_req_ies_len = len;
 375
 376         return 0;
 377 }
 378
 379
 380 static int wpa_driver_wext_event_wireless_assocrespie(
 381         struct wpa_driver_wext_data *drv, const char *ev, int len)
 382 {
 383         if (len < 0)
 384                 return -1;
 385
 386         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 387                     len);
 388         os_free(drv->assoc_resp_ies);
 389         drv->assoc_resp_ies = os_malloc(len);
 390         if (drv->assoc_resp_ies == NULL) {
 391                 drv->assoc_resp_ies_len = 0;
 392                 return -1;
 393         }
 394         os_memcpy(drv->assoc_resp_ies, ev, len);
 395         drv->assoc_resp_ies_len = len;
 396
 397         return 0;
 398 }
 399
 400
 401 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 402 {
 403         union wpa_event_data data;
 404
 405         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 406                 return;
 407
 408         os_memset(&data, 0, sizeof(data));
 409         if (drv->assoc_req_ies) {
 410                 data.assoc_info.req_ies = drv->assoc_req_ies;
 411                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 412         }
 413         if (drv->assoc_resp_ies) {
 414                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 415                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 416         }
 417
 418         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 419
 420         os_free(drv->assoc_req_ies);
 421         drv->assoc_req_ies = NULL;
 422         os_free(drv->assoc_resp_ies);
 423         drv->assoc_resp_ies = NULL;
 424 }
 425
 426
 427 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 428                                            char *data, int len)
 429 {
 430         struct iw_event iwe_buf, *iwe = &iwe_buf;
 431         char *pos, *end, *custom, *buf;
 432
 433         pos = data;
 434         end = data + len;
 435
 436         while (pos + IW_EV_LCP_LEN <= end) {
 437                 /* Event data may be unaligned, so make a local, aligned copy
 438                  * before processing. */
 439                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 440                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 441                            iwe->cmd, iwe->len);
 442                 if (iwe->len <= IW_EV_LCP_LEN)
 443                         return;
 444
 445                 custom = pos + IW_EV_POINT_LEN;
 446                 if (drv->we_version_compiled > 18 &&
 447                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 448                      iwe->cmd == IWEVCUSTOM ||
 449                      iwe->cmd == IWEVASSOCREQIE ||
 450                      iwe->cmd == IWEVASSOCRESPIE ||
 451                      iwe->cmd == IWEVPMKIDCAND)) {
 452                         /* WE-19 removed the pointer from struct iw_point */
 453                         char *dpos = (char *) &iwe_buf.u.data.length;
 454                         int dlen = dpos - (char *) &iwe_buf;
 455                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 456                                   sizeof(struct iw_event) - dlen);
 457                 } else {
 458                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 459                         custom += IW_EV_POINT_OFF;
 460                 }
 461
 462                 switch (iwe->cmd) {
 463                 case SIOCGIWAP:
 464                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 465                                    MACSTR,
 466                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 467                         if (is_zero_ether_addr(
 468                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 469                             os_memcmp(iwe->u.ap_addr.sa_data,
 470                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 471                             0) {
 472                                 os_free(drv->assoc_req_ies);
 473                                 drv->assoc_req_ies = NULL;
 474                                 os_free(drv->assoc_resp_ies);
 475                                 drv->assoc_resp_ies = NULL;
 476                                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC,
 477                                                      NULL);
 478
 479                         } else {
 480                                 wpa_driver_wext_event_assoc_ies(drv);
 481                                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC,
 482                                                      NULL);
 483                         }
 484                         break;
 485                 case IWEVMICHAELMICFAILURE:
 486                         if (custom + iwe->u.data.length > end) {
 487                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 488                                            "IWEVMICHAELMICFAILURE length");
 489                                 return;
 490                         }
 491                         wpa_driver_wext_event_wireless_michaelmicfailure(
 492                                 drv->ctx, custom, iwe->u.data.length);
 493                         break;
 494                 case IWEVCUSTOM:
 495                         if (custom + iwe->u.data.length > end) {
 496                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 497                                            "IWEVCUSTOM length");
 498                                 return;
 499                         }
 500                         buf = os_malloc(iwe->u.data.length + 1);
 501                         if (buf == NULL)
 502                                 return;
 503                         os_memcpy(buf, custom, iwe->u.data.length);
 504                         buf[iwe->u.data.length] = '\0';
 505                         wpa_driver_wext_event_wireless_custom(drv->ctx, buf);
 506                         os_free(buf);
 507                         break;
 508                 case SIOCGIWSCAN:
 509                         drv->scan_complete_events = 1;
 510                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 511                                              drv, drv->ctx);
 512                         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS,
 513                                              NULL);
 514                         break;
 515                 case IWEVASSOCREQIE:
 516                         if (custom + iwe->u.data.length > end) {
 517                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 518                                            "IWEVASSOCREQIE length");
 519                                 return;
 520                         }
 521                         wpa_driver_wext_event_wireless_assocreqie(
 522                                 drv, custom, iwe->u.data.length);
 523                         break;
 524                 case IWEVASSOCRESPIE:
 525                         if (custom + iwe->u.data.length > end) {
 526                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 527                                            "IWEVASSOCRESPIE length");
 528                                 return;
 529                         }
 530                         wpa_driver_wext_event_wireless_assocrespie(
 531                                 drv, custom, iwe->u.data.length);
 532                         break;
 533                 case IWEVPMKIDCAND:
 534                         if (custom + iwe->u.data.length > end) {
 535                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 536                                            "IWEVPMKIDCAND length");
 537                                 return;
 538                         }
 539                         wpa_driver_wext_event_wireless_pmkidcand(
 540                                 drv, custom, iwe->u.data.length);
 541                         break;
 542                 }
 543
 544                 pos += iwe->len;
 545         }
 546 }
 547
 548
 549 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 550                                        char *buf, size_t len, int del)
 551 {
 552         union wpa_event_data event;
 553
 554         os_memset(&event, 0, sizeof(event));
 555         if (len > sizeof(event.interface_status.ifname))
 556                 len = sizeof(event.interface_status.ifname) - 1;
 557         os_memcpy(event.interface_status.ifname, buf, len);
 558         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 559                 EVENT_INTERFACE_ADDED;
 560
 561         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 562                    del ? "DEL" : "NEW",
 563                    event.interface_status.ifname,
 564                    del ? "removed" : "added");
 565
 566         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 567                 if (del)
 568                         drv->if_removed = 1;
 569                 else
 570                         drv->if_removed = 0;
 571         }
 572
 573         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 574 }
 575
 576
 577 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 578                                       u8 *buf, size_t len)
 579 {
 580         int attrlen, rta_len;
 581         struct rtattr *attr;
 582
 583         attrlen = len;
 584         attr = (struct rtattr *) buf;
 585
 586         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 587         while (RTA_OK(attr, attrlen)) {
 588                 if (attr->rta_type == IFLA_IFNAME) {
 589                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 590                             == 0)
 591                                 return 1;
 592                         else
 593                                 break;
 594                 }
 595                 attr = RTA_NEXT(attr, attrlen);
 596         }
 597
 598         return 0;
 599 }
 600
 601
 602 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 603                                        int ifindex, u8 *buf, size_t len)
 604 {
 605         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 606                 return 1;
 607
 608         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, buf, len)) {
 609                 drv->ifindex = if_nametoindex(drv->ifname);
 610                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 611                            "interface");
 612                 wpa_driver_wext_finish_drv_init(drv);
 613                 return 1;
 614         }
 615
 616         return 0;
 617 }
 618
 619
 620 static void wpa_driver_wext_event_rtm_newlink(void *ctx, struct ifinfomsg *ifi,
 621                                               u8 *buf, size_t len)
 622 {
 623         struct wpa_driver_wext_data *drv = ctx;
 624         int attrlen, rta_len;
 625         struct rtattr *attr;
 626
 627         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 628                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 629                            ifi->ifi_index);
 630                 return;
 631         }
 632
 633         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 634                    "(%s%s%s%s)",
 635                    drv->operstate, ifi->ifi_flags,
 636                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 637                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 638                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 639                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 640
 641         if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
 642                 wpa_printf(MSG_DEBUG, "WEXT: Interface down");
 643                 drv->if_disabled = 1;
 644                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
 645         }
 646
 647         if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
 648                 wpa_printf(MSG_DEBUG, "WEXT: Interface up");
 649                 drv->if_disabled = 0;
 650                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
 651         }
 652
 653         /*
 654          * Some drivers send the association event before the operup event--in
 655          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 656          * fails. This will hit us when wpa_supplicant does not need to do
 657          * IEEE 802.1X authentication
 658          */
 659         if (drv->operstate == 1 &&
 660             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 661             !(ifi->ifi_flags & IFF_RUNNING))
 662                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 663                                        -1, IF_OPER_UP);
 664
 665         attrlen = len;
 666         attr = (struct rtattr *) buf;
 667
 668         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 669         while (RTA_OK(attr, attrlen)) {
 670                 if (attr->rta_type == IFLA_WIRELESS) {
 671                         wpa_driver_wext_event_wireless(
 672                                 drv, ((char *) attr) + rta_len,
 673                                 attr->rta_len - rta_len);
 674                 } else if (attr->rta_type == IFLA_IFNAME) {
 675                         wpa_driver_wext_event_link(drv,
 676                                                    ((char *) attr) + rta_len,
 677                                                    attr->rta_len - rta_len, 0);
 678                 }
 679                 attr = RTA_NEXT(attr, attrlen);
 680         }
 681 }
 682
 683
 684 static void wpa_driver_wext_event_rtm_dellink(void *ctx, struct ifinfomsg *ifi,
 685                                               u8 *buf, size_t len)
 686 {
 687         struct wpa_driver_wext_data *drv = ctx;
 688         int attrlen, rta_len;
 689         struct rtattr *attr;
 690
 691         attrlen = len;
 692         attr = (struct rtattr *) buf;
 693
 694         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 695         while (RTA_OK(attr, attrlen)) {
 696                 if (attr->rta_type == IFLA_IFNAME) {
 697                         wpa_driver_wext_event_link(drv,
 698                                                    ((char *) attr) + rta_len,
 699                                                    attr->rta_len - rta_len, 1);
 700                 }
 701                 attr = RTA_NEXT(attr, attrlen);
 702         }
 703 }
 704
 705
 706 static void wpa_driver_wext_rfkill_blocked(void *ctx)
 707 {
 708         wpa_printf(MSG_DEBUG, "WEXT: RFKILL blocked");
 709         /*
 710          * This may be for any interface; use ifdown event to disable
 711          * interface.
 712          */
 713 }
 714
 715
 716 static void wpa_driver_wext_rfkill_unblocked(void *ctx)
 717 {
 718         struct wpa_driver_wext_data *drv = ctx;
 719         wpa_printf(MSG_DEBUG, "WEXT: RFKILL unblocked");
 720         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
 721                 wpa_printf(MSG_DEBUG, "WEXT: Could not set interface UP "
 722                            "after rfkill unblock");
 723                 return;
 724         }
 725         /* rtnetlink ifup handler will report interface as enabled */
 726 }
 727
 728
 729 static void wext_get_phy_name(struct wpa_driver_wext_data *drv)
 730 {
 731         /* Find phy (radio) to which this interface belongs */
 732         char buf[90], *pos;
 733         int f, rv;
 734
 735         drv->phyname[0] = '\0';
 736         snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
 737                  drv->ifname);
 738         f = open(buf, O_RDONLY);
 739         if (f < 0) {
 740                 wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
 741                            buf, strerror(errno));
 742                 return;
 743         }
 744
 745         rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
 746         close(f);
 747         if (rv < 0) {
 748                 wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
 749                            buf, strerror(errno));
 750                 return;
 751         }
 752
 753         drv->phyname[rv] = '\0';
 754         pos = os_strchr(drv->phyname, '\n');
 755         if (pos)
 756                 *pos = '\0';
 757         wpa_printf(MSG_DEBUG, "wext: interface %s phy: %s",
 758                    drv->ifname, drv->phyname);
 759 }
 760
 761
 762 /**
 763  * wpa_driver_wext_init - Initialize WE driver interface
 764  * @ctx: context to be used when calling wpa_supplicant functions,
 765  * e.g., wpa_supplicant_event()
 766  * @ifname: interface name, e.g., wlan0
 767  * Returns: Pointer to private data, %NULL on failure
 768  */
 769 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 770 {
 771         struct wpa_driver_wext_data *drv;
 772         struct netlink_config *cfg;
 773         struct rfkill_config *rcfg;
 774         char path[128];
 775         struct stat buf;
 776
 777         drv = os_zalloc(sizeof(*drv));
 778         if (drv == NULL)
 779                 return NULL;
 780         drv->ctx = ctx;
 781         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 782
 783         os_snprintf(path, sizeof(path), "/sys/class/net/%s/phy80211", ifname);
 784         if (stat(path, &buf) == 0) {
 785                 wpa_printf(MSG_DEBUG, "WEXT: cfg80211-based driver detected");
 786                 drv->cfg80211 = 1;
 787                 wext_get_phy_name(drv);
 788         }
 789
 790         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 791         if (drv->ioctl_sock < 0) {
 792                 perror("socket(PF_INET,SOCK_DGRAM)");
 793                 goto err1;
 794         }
 795
 796         cfg = os_zalloc(sizeof(*cfg));
 797         if (cfg == NULL)
 798                 goto err1;
 799         cfg->ctx = drv;
 800         cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink;
 801         cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink;
 802         drv->netlink = netlink_init(cfg);
 803         if (drv->netlink == NULL) {
 804                 os_free(cfg);
 805                 goto err2;
 806         }
 807
 808         rcfg = os_zalloc(sizeof(*rcfg));
 809         if (rcfg == NULL)
 810                 goto err3;
 811         rcfg->ctx = drv;
 812         os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
 813         rcfg->blocked_cb = wpa_driver_wext_rfkill_blocked;
 814         rcfg->unblocked_cb = wpa_driver_wext_rfkill_unblocked;
 815         drv->rfkill = rfkill_init(rcfg);
 816         if (drv->rfkill == NULL) {
 817                 wpa_printf(MSG_DEBUG, "WEXT: RFKILL status not available");
 818                 os_free(rcfg);
 819         }
 820
 821         drv->mlme_sock = -1;
 822
 823         if (wpa_driver_wext_finish_drv_init(drv) < 0)
 824                 goto err3;
 825
 826         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1);
 827
 828         return drv;
 829
 830 err3:
 831         rfkill_deinit(drv->rfkill);
 832         netlink_deinit(drv->netlink);
 833 err2:
 834         close(drv->ioctl_sock);
 835 err1:
 836         os_free(drv);
 837         return NULL;
 838 }
 839
 840
 841 static void wpa_driver_wext_send_rfkill(void *eloop_ctx, void *timeout_ctx)
 842 {
 843         wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
 844 }
 845
 846
 847 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
 848 {
 849         int send_rfkill_event = 0;
 850
 851         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1) < 0) {
 852                 if (rfkill_is_blocked(drv->rfkill)) {
 853                         wpa_printf(MSG_DEBUG, "WEXT: Could not yet enable "
 854                                    "interface '%s' due to rfkill",
 855                                    drv->ifname);
 856                         drv->if_disabled = 1;
 857                         send_rfkill_event = 1;
 858                 } else {
 859                         wpa_printf(MSG_ERROR, "WEXT: Could not set "
 860                                    "interface '%s' UP", drv->ifname);
 861                         return -1;
 862                 }
 863         }
 864
 865         /*
 866          * Make sure that the driver does not have any obsolete PMKID entries.
 867          */
 868         wpa_driver_wext_flush_pmkid(drv);
 869
 870         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
 871                 wpa_printf(MSG_DEBUG, "Could not configure driver to use "
 872                            "managed mode");
 873                 /* Try to use it anyway */
 874         }
 875
 876         wpa_driver_wext_get_range(drv);
 877
 878         /*
 879          * Unlock the driver's BSSID and force to a random SSID to clear any
 880          * previous association the driver might have when the supplicant
 881          * starts up.
 882          */
 883         wpa_driver_wext_disconnect(drv);
 884
 885         drv->ifindex = if_nametoindex(drv->ifname);
 886
 887         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
 888                 /*
 889                  * Host AP driver may use both wlan# and wifi# interface in
 890                  * wireless events. Since some of the versions included WE-18
 891                  * support, let's add the alternative ifindex also from
 892                  * driver_wext.c for the time being. This may be removed at
 893                  * some point once it is believed that old versions of the
 894                  * driver are not in use anymore.
 895                  */
 896                 char ifname2[IFNAMSIZ + 1];
 897                 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
 898                 os_memcpy(ifname2, "wifi", 4);
 899                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
 900         }
 901
 902         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 903                                1, IF_OPER_DORMANT);
 904
 905         if (send_rfkill_event) {
 906                 eloop_register_timeout(0, 0, wpa_driver_wext_send_rfkill,
 907                                        drv, drv->ctx);
 908         }
 909
 910         return 0;
 911 }
 912
 913
 914 /**
 915  * wpa_driver_wext_deinit - Deinitialize WE driver interface
 916  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 917  *
 918  * Shut down driver interface and processing of driver events. Free
 919  * private data buffer if one was allocated in wpa_driver_wext_init().
 920  */
 921 void wpa_driver_wext_deinit(void *priv)
 922 {
 923         struct wpa_driver_wext_data *drv = priv;
 924
 925         wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
 926
 927         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
 928
 929         /*
 930          * Clear possibly configured driver parameters in order to make it
 931          * easier to use the driver after wpa_supplicant has been terminated.
 932          */
 933         wpa_driver_wext_disconnect(drv);
 934
 935         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
 936         netlink_deinit(drv->netlink);
 937         rfkill_deinit(drv->rfkill);
 938
 939         if (drv->mlme_sock >= 0)
 940                 eloop_unregister_read_sock(drv->mlme_sock);
 941
 942         (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
 943
 944         close(drv->ioctl_sock);
 945         if (drv->mlme_sock >= 0)
 946                 close(drv->mlme_sock);
 947         os_free(drv->assoc_req_ies);
 948         os_free(drv->assoc_resp_ies);
 949         os_free(drv);
 950 }
 951
 952
 953 /**
 954  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
 955  * @eloop_ctx: Unused
 956  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
 957  *
 958  * This function can be used as registered timeout when starting a scan to
 959  * generate a scan completed event if the driver does not report this.
 960  */
 961 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
 962 {
 963         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
 964         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
 965 }
 966
 967
 968 /**
 969  * wpa_driver_wext_scan - Request the driver to initiate scan
 970  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 971  * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
 972  * Returns: 0 on success, -1 on failure
 973  */
 974 int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
 975 {
 976         struct wpa_driver_wext_data *drv = priv;
 977         struct iwreq iwr;
 978         int ret = 0, timeout;
 979         struct iw_scan_req req;
 980         const u8 *ssid = params->ssids[0].ssid;
 981         size_t ssid_len = params->ssids[0].ssid_len;
 982
 983         if (ssid_len > IW_ESSID_MAX_SIZE) {
 984                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
 985                            __FUNCTION__, (unsigned long) ssid_len);
 986                 return -1;
 987         }
 988
 989         os_memset(&iwr, 0, sizeof(iwr));
 990         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 991
 992         if (ssid && ssid_len) {
 993                 os_memset(&req, 0, sizeof(req));
 994                 req.essid_len = ssid_len;
 995                 req.bssid.sa_family = ARPHRD_ETHER;
 996                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
 997                 os_memcpy(req.essid, ssid, ssid_len);
 998                 iwr.u.data.pointer = (caddr_t) &req;
 999                 iwr.u.data.length = sizeof(req);
1000                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1001         }
1002
1003         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1004                 perror("ioctl[SIOCSIWSCAN]");
1005                 ret = -1;
1006         }
1007
1008         /* Not all drivers generate "scan completed" wireless event, so try to
1009          * read results after a timeout. */
1010         timeout = 5;
1011         if (drv->scan_complete_events) {
1012                 /*
1013                  * The driver seems to deliver SIOCGIWSCAN events to notify
1014                  * when scan is complete, so use longer timeout to avoid race
1015                  * conditions with scanning and following association request.
1016                  */
1017                 timeout = 30;
1018         }
1019         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1020                    "seconds", ret, timeout);
1021         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1022         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1023                                drv->ctx);
1024
1025         return ret;
1026 }
1027
1028
1029 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1030                                     size_t *len)
1031 {
1032         struct iwreq iwr;
1033         u8 *res_buf;
1034         size_t res_buf_len;
1035
1036         res_buf_len = IW_SCAN_MAX_DATA;
1037         for (;;) {
1038                 res_buf = os_malloc(res_buf_len);
1039                 if (res_buf == NULL)
1040                         return NULL;
1041                 os_memset(&iwr, 0, sizeof(iwr));
1042                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1043                 iwr.u.data.pointer = res_buf;
1044                 iwr.u.data.length = res_buf_len;
1045
1046                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1047                         break;
1048
1049                 if (errno == E2BIG && res_buf_len < 65535) {
1050                         os_free(res_buf);
1051                         res_buf = NULL;
1052                         res_buf_len *= 2;
1053                         if (res_buf_len > 65535)
1054                                 res_buf_len = 65535; /* 16-bit length field */
1055                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1056                                    "trying larger buffer (%lu bytes)",
1057                                    (unsigned long) res_buf_len);
1058                 } else {
1059                         perror("ioctl[SIOCGIWSCAN]");
1060                         os_free(res_buf);
1061                         return NULL;
1062                 }
1063         }
1064
1065         if (iwr.u.data.length > res_buf_len) {
1066                 os_free(res_buf);
1067                 return NULL;
1068         }
1069         *len = iwr.u.data.length;
1070
1071         return res_buf;
1072 }
1073
1074
1075 /*
1076  * Data structure for collecting WEXT scan results. This is needed to allow
1077  * the various methods of reporting IEs to be combined into a single IE buffer.
1078  */
1079 struct wext_scan_data {
1080         struct wpa_scan_res res;
1081         u8 *ie;
1082         size_t ie_len;
1083         u8 ssid[32];
1084         size_t ssid_len;
1085         int maxrate;
1086 };
1087
1088
1089 static void wext_get_scan_mode(struct iw_event *iwe,
1090                                struct wext_scan_data *res)
1091 {
1092         if (iwe->u.mode == IW_MODE_ADHOC)
1093                 res->res.caps |= IEEE80211_CAP_IBSS;
1094         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1095                 res->res.caps |= IEEE80211_CAP_ESS;
1096 }
1097
1098
1099 static void wext_get_scan_ssid(struct iw_event *iwe,
1100                                struct wext_scan_data *res, char *custom,
1101                                char *end)
1102 {
1103         int ssid_len = iwe->u.essid.length;
1104         if (custom + ssid_len > end)
1105                 return;
1106         if (iwe->u.essid.flags &&
1107             ssid_len > 0 &&
1108             ssid_len <= IW_ESSID_MAX_SIZE) {
1109                 os_memcpy(res->ssid, custom, ssid_len);
1110                 res->ssid_len = ssid_len;
1111         }
1112 }
1113
1114
1115 static void wext_get_scan_freq(struct iw_event *iwe,
1116                                struct wext_scan_data *res)
1117 {
1118         int divi = 1000000, i;
1119
1120         if (iwe->u.freq.e == 0) {
1121                 /*
1122                  * Some drivers do not report frequency, but a channel.
1123                  * Try to map this to frequency by assuming they are using
1124                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1125                  * frequency if the driver sends both frequency and channel,
1126                  * since the driver may be sending an A-band channel that we
1127                  * don't handle here.
1128                  */
1129
1130                 if (res->res.freq)
1131                         return;
1132
1133                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1134                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1135                         return;
1136                 } else if (iwe->u.freq.m == 14) {
1137                         res->res.freq = 2484;
1138                         return;
1139                 }
1140         }
1141
1142         if (iwe->u.freq.e > 6) {
1143                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1144                            MACSTR " m=%d e=%d)",
1145                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1146                            iwe->u.freq.e);
1147                 return;
1148         }
1149
1150         for (i = 0; i < iwe->u.freq.e; i++)
1151                 divi /= 10;
1152         res->res.freq = iwe->u.freq.m / divi;
1153 }
1154
1155
1156 static void wext_get_scan_qual(struct wpa_driver_wext_data *drv,
1157                                struct iw_event *iwe,
1158                                struct wext_scan_data *res)
1159 {
1160         res->res.qual = iwe->u.qual.qual;
1161         res->res.noise = iwe->u.qual.noise;
1162         res->res.level = iwe->u.qual.level;
1163         if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
1164                 res->res.flags |= WPA_SCAN_QUAL_INVALID;
1165         if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
1166                 res->res.flags |= WPA_SCAN_LEVEL_INVALID;
1167         if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
1168                 res->res.flags |= WPA_SCAN_NOISE_INVALID;
1169         if (iwe->u.qual.updated & IW_QUAL_DBM)
1170                 res->res.flags |= WPA_SCAN_LEVEL_DBM;
1171         if ((iwe->u.qual.updated & IW_QUAL_DBM) ||
1172             ((iwe->u.qual.level != 0) &&
1173              (iwe->u.qual.level > drv->max_level))) {
1174                 if (iwe->u.qual.level >= 64)
1175                         res->res.level -= 0x100;
1176                 if (iwe->u.qual.noise >= 64)
1177                         res->res.noise -= 0x100;
1178         }
1179 }
1180
1181
1182 static void wext_get_scan_encode(struct iw_event *iwe,
1183                                  struct wext_scan_data *res)
1184 {
1185         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1186                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1187 }
1188
1189
1190 static void wext_get_scan_rate(struct iw_event *iwe,
1191                                struct wext_scan_data *res, char *pos,
1192                                char *end)
1193 {
1194         int maxrate;
1195         char *custom = pos + IW_EV_LCP_LEN;
1196         struct iw_param p;
1197         size_t clen;
1198
1199         clen = iwe->len;
1200         if (custom + clen > end)
1201                 return;
1202         maxrate = 0;
1203         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1204                 /* Note: may be misaligned, make a local, aligned copy */
1205                 os_memcpy(&p, custom, sizeof(struct iw_param));
1206                 if (p.value > maxrate)
1207                         maxrate = p.value;
1208                 clen -= sizeof(struct iw_param);
1209                 custom += sizeof(struct iw_param);
1210         }
1211
1212         /* Convert the maxrate from WE-style (b/s units) to
1213          * 802.11 rates (500000 b/s units).
1214          */
1215         res->maxrate = maxrate / 500000;
1216 }
1217
1218
1219 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1220                                     struct wext_scan_data *res, char *custom,
1221                                     char *end)
1222 {
1223         char *genie, *gpos, *gend;
1224         u8 *tmp;
1225
1226         if (iwe->u.data.length == 0)
1227                 return;
1228
1229         gpos = genie = custom;
1230         gend = genie + iwe->u.data.length;
1231         if (gend > end) {
1232                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1233                 return;
1234         }
1235
1236         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1237         if (tmp == NULL)
1238                 return;
1239         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1240         res->ie = tmp;
1241         res->ie_len += gend - gpos;
1242 }
1243
1244
1245 static void wext_get_scan_custom(struct iw_event *iwe,
1246                                  struct wext_scan_data *res, char *custom,
1247                                  char *end)
1248 {
1249         size_t clen;
1250         u8 *tmp;
1251
1252         clen = iwe->u.data.length;
1253         if (custom + clen > end)
1254                 return;
1255
1256         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1257                 char *spos;
1258                 int bytes;
1259                 spos = custom + 7;
1260                 bytes = custom + clen - spos;
1261                 if (bytes & 1 || bytes == 0)
1262                         return;
1263                 bytes /= 2;
1264                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1265                 if (tmp == NULL)
1266                         return;
1267                 res->ie = tmp;
1268                 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1269                         return;
1270                 res->ie_len += bytes;
1271         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1272                 char *spos;
1273                 int bytes;
1274                 spos = custom + 7;
1275                 bytes = custom + clen - spos;
1276                 if (bytes & 1 || bytes == 0)
1277                         return;
1278                 bytes /= 2;
1279                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1280                 if (tmp == NULL)
1281                         return;
1282                 res->ie = tmp;
1283                 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1284                         return;
1285                 res->ie_len += bytes;
1286         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1287                 char *spos;
1288                 int bytes;
1289                 u8 bin[8];
1290                 spos = custom + 4;
1291                 bytes = custom + clen - spos;
1292                 if (bytes != 16) {
1293                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1294                         return;
1295                 }
1296                 bytes /= 2;
1297                 if (hexstr2bin(spos, bin, bytes) < 0) {
1298                         wpa_printf(MSG_DEBUG, "WEXT: Invalid TSF value");
1299                         return;
1300                 }
1301                 res->res.tsf += WPA_GET_BE64(bin);
1302         }
1303 }
1304
1305
1306 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1307 {
1308         return drv->we_version_compiled > 18 &&
1309                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1310                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1311 }
1312
1313
1314 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1315                                            struct wext_scan_data *data)
1316 {
1317         struct wpa_scan_res **tmp;
1318         struct wpa_scan_res *r;
1319         size_t extra_len;
1320         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1321
1322         /* Figure out whether we need to fake any IEs */
1323         pos = data->ie;
1324         end = pos + data->ie_len;
1325         while (pos && pos + 1 < end) {
1326                 if (pos + 2 + pos[1] > end)
1327                         break;
1328                 if (pos[0] == WLAN_EID_SSID)
1329                         ssid_ie = pos;
1330                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1331                         rate_ie = pos;
1332                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1333                         rate_ie = pos;
1334                 pos += 2 + pos[1];
1335         }
1336
1337         extra_len = 0;
1338         if (ssid_ie == NULL)
1339                 extra_len += 2 + data->ssid_len;
1340         if (rate_ie == NULL && data->maxrate)
1341                 extra_len += 3;
1342
1343         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1344         if (r == NULL)
1345                 return;
1346         os_memcpy(r, &data->res, sizeof(*r));
1347         r->ie_len = extra_len + data->ie_len;
1348         pos = (u8 *) (r + 1);
1349         if (ssid_ie == NULL) {
1350                 /*
1351                  * Generate a fake SSID IE since the driver did not report
1352                  * a full IE list.
1353                  */
1354                 *pos++ = WLAN_EID_SSID;
1355                 *pos++ = data->ssid_len;
1356                 os_memcpy(pos, data->ssid, data->ssid_len);
1357                 pos += data->ssid_len;
1358         }
1359         if (rate_ie == NULL && data->maxrate) {
1360                 /*
1361                  * Generate a fake Supported Rates IE since the driver did not
1362                  * report a full IE list.
1363                  */
1364                 *pos++ = WLAN_EID_SUPP_RATES;
1365                 *pos++ = 1;
1366                 *pos++ = data->maxrate;
1367         }
1368         if (data->ie)
1369                 os_memcpy(pos, data->ie, data->ie_len);
1370
1371         tmp = os_realloc(res->res,
1372                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1373         if (tmp == NULL) {
1374                 os_free(r);
1375                 return;
1376         }
1377         tmp[res->num++] = r;
1378         res->res = tmp;
1379 }
1380
1381
1382 /**
1383  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1384  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1385  * Returns: Scan results on success, -1 on failure
1386  */
1387 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1388 {
1389         struct wpa_driver_wext_data *drv = priv;
1390         size_t ap_num = 0, len;
1391         int first;
1392         u8 *res_buf;
1393         struct iw_event iwe_buf, *iwe = &iwe_buf;
1394         char *pos, *end, *custom;
1395         struct wpa_scan_results *res;
1396         struct wext_scan_data data;
1397
1398         res_buf = wpa_driver_wext_giwscan(drv, &len);
1399         if (res_buf == NULL)
1400                 return NULL;
1401
1402         ap_num = 0;
1403         first = 1;
1404
1405         res = os_zalloc(sizeof(*res));
1406         if (res == NULL) {
1407                 os_free(res_buf);
1408                 return NULL;
1409         }
1410
1411         pos = (char *) res_buf;
1412         end = (char *) res_buf + len;
1413         os_memset(&data, 0, sizeof(data));
1414
1415         while (pos + IW_EV_LCP_LEN <= end) {
1416                 /* Event data may be unaligned, so make a local, aligned copy
1417                  * before processing. */
1418                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1419                 if (iwe->len <= IW_EV_LCP_LEN)
1420                         break;
1421
1422                 custom = pos + IW_EV_POINT_LEN;
1423                 if (wext_19_iw_point(drv, iwe->cmd)) {
1424                         /* WE-19 removed the pointer from struct iw_point */
1425                         char *dpos = (char *) &iwe_buf.u.data.length;
1426                         int dlen = dpos - (char *) &iwe_buf;
1427                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1428                                   sizeof(struct iw_event) - dlen);
1429                 } else {
1430                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1431                         custom += IW_EV_POINT_OFF;
1432                 }
1433
1434                 switch (iwe->cmd) {
1435                 case SIOCGIWAP:
1436                         if (!first)
1437                                 wpa_driver_wext_add_scan_entry(res, &data);
1438                         first = 0;
1439                         os_free(data.ie);
1440                         os_memset(&data, 0, sizeof(data));
1441                         os_memcpy(data.res.bssid,
1442                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1443                         break;
1444                 case SIOCGIWMODE:
1445                         wext_get_scan_mode(iwe, &data);
1446                         break;
1447                 case SIOCGIWESSID:
1448                         wext_get_scan_ssid(iwe, &data, custom, end);
1449                         break;
1450                 case SIOCGIWFREQ:
1451                         wext_get_scan_freq(iwe, &data);
1452                         break;
1453                 case IWEVQUAL:
1454                         wext_get_scan_qual(drv, iwe, &data);
1455                         break;
1456                 case SIOCGIWENCODE:
1457                         wext_get_scan_encode(iwe, &data);
1458                         break;
1459                 case SIOCGIWRATE:
1460                         wext_get_scan_rate(iwe, &data, pos, end);
1461                         break;
1462                 case IWEVGENIE:
1463                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1464                         break;
1465                 case IWEVCUSTOM:
1466                         wext_get_scan_custom(iwe, &data, custom, end);
1467                         break;
1468                 }
1469
1470                 pos += iwe->len;
1471         }
1472         os_free(res_buf);
1473         res_buf = NULL;
1474         if (!first)
1475                 wpa_driver_wext_add_scan_entry(res, &data);
1476         os_free(data.ie);
1477
1478         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1479                    (unsigned long) len, (unsigned long) res->num);
1480
1481         return res;
1482 }
1483
1484
1485 static int wpa_driver_wext_get_range(void *priv)
1486 {
1487         struct wpa_driver_wext_data *drv = priv;
1488         struct iw_range *range;
1489         struct iwreq iwr;
1490         int minlen;
1491         size_t buflen;
1492
1493         /*
1494          * Use larger buffer than struct iw_range in order to allow the
1495          * structure to grow in the future.
1496          */
1497         buflen = sizeof(struct iw_range) + 500;
1498         range = os_zalloc(buflen);
1499         if (range == NULL)
1500                 return -1;
1501
1502         os_memset(&iwr, 0, sizeof(iwr));
1503         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1504         iwr.u.data.pointer = (caddr_t) range;
1505         iwr.u.data.length = buflen;
1506
1507         minlen = ((char *) &range->enc_capa) - (char *) range +
1508                 sizeof(range->enc_capa);
1509
1510         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1511                 perror("ioctl[SIOCGIWRANGE]");
1512                 os_free(range);
1513                 return -1;
1514         } else if (iwr.u.data.length >= minlen &&
1515                    range->we_version_compiled >= 18) {
1516                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1517                            "WE(source)=%d enc_capa=0x%x",
1518                            range->we_version_compiled,
1519                            range->we_version_source,
1520                            range->enc_capa);
1521                 drv->has_capability = 1;
1522                 drv->we_version_compiled = range->we_version_compiled;
1523                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1524                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1525                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1526                 }
1527                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1528                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1529                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1530                 }
1531                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1532                         WPA_DRIVER_CAPA_ENC_WEP104;
1533                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1534                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1535                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1536                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1537                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1538                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1539                 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1540                         WPA_DRIVER_AUTH_SHARED |
1541                         WPA_DRIVER_AUTH_LEAP;
1542                 drv->capa.max_scan_ssids = 1;
1543
1544                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1545                            "flags 0x%x",
1546                            drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1547         } else {
1548                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1549                            "assuming WPA is not supported");
1550         }
1551
1552         drv->max_level = range->max_qual.level;
1553
1554         os_free(range);
1555         return 0;
1556 }
1557
1558
1559 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1560                                    const u8 *psk)
1561 {
1562         struct iw_encode_ext *ext;
1563         struct iwreq iwr;
1564         int ret;
1565
1566         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1567
1568         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1569                 return 0;
1570
1571         if (!psk)
1572                 return 0;
1573
1574         os_memset(&iwr, 0, sizeof(iwr));
1575         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1576
1577         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1578         if (ext == NULL)
1579                 return -1;
1580
1581         iwr.u.encoding.pointer = (caddr_t) ext;
1582         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1583         ext->key_len = PMK_LEN;
1584         os_memcpy(&ext->key, psk, ext->key_len);
1585         ext->alg = IW_ENCODE_ALG_PMK;
1586
1587         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1588         if (ret < 0)
1589                 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1590         os_free(ext);
1591
1592         return ret;
1593 }
1594
1595
1596 static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg,
1597                                        const u8 *addr, int key_idx,
1598                                        int set_tx, const u8 *seq,
1599                                        size_t seq_len,
1600                                        const u8 *key, size_t key_len)
1601 {
1602         struct wpa_driver_wext_data *drv = priv;
1603         struct iwreq iwr;
1604         int ret = 0;
1605         struct iw_encode_ext *ext;
1606
1607         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1608                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1609                            __FUNCTION__, (unsigned long) seq_len);
1610                 return -1;
1611         }
1612
1613         ext = os_zalloc(sizeof(*ext) + key_len);
1614         if (ext == NULL)
1615                 return -1;
1616         os_memset(&iwr, 0, sizeof(iwr));
1617         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1618         iwr.u.encoding.flags = key_idx + 1;
1619         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1620         if (alg == WPA_ALG_NONE)
1621                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1622         iwr.u.encoding.pointer = (caddr_t) ext;
1623         iwr.u.encoding.length = sizeof(*ext) + key_len;
1624
1625         if (addr == NULL ||
1626             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1627                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1628         if (set_tx)
1629                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1630
1631         ext->addr.sa_family = ARPHRD_ETHER;
1632         if (addr)
1633                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1634         else
1635                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1636         if (key && key_len) {
1637                 os_memcpy(ext + 1, key, key_len);
1638                 ext->key_len = key_len;
1639         }
1640         switch (alg) {
1641         case WPA_ALG_NONE:
1642                 ext->alg = IW_ENCODE_ALG_NONE;
1643                 break;
1644         case WPA_ALG_WEP:
1645                 ext->alg = IW_ENCODE_ALG_WEP;
1646                 break;
1647         case WPA_ALG_TKIP:
1648                 ext->alg = IW_ENCODE_ALG_TKIP;
1649                 break;
1650         case WPA_ALG_CCMP:
1651                 ext->alg = IW_ENCODE_ALG_CCMP;
1652                 break;
1653         case WPA_ALG_PMK:
1654                 ext->alg = IW_ENCODE_ALG_PMK;
1655                 break;
1656 #ifdef CONFIG_IEEE80211W
1657         case WPA_ALG_IGTK:
1658                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1659                 break;
1660 #endif /* CONFIG_IEEE80211W */
1661         default:
1662                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1663                            __FUNCTION__, alg);
1664                 os_free(ext);
1665                 return -1;
1666         }
1667
1668         if (seq && seq_len) {
1669                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1670                 os_memcpy(ext->rx_seq, seq, seq_len);
1671         }
1672
1673         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1674                 ret = errno == EOPNOTSUPP ? -2 : -1;
1675                 if (errno == ENODEV) {
1676                         /*
1677                          * ndiswrapper seems to be returning incorrect error
1678                          * code.. */
1679                         ret = -2;
1680                 }
1681
1682                 perror("ioctl[SIOCSIWENCODEEXT]");
1683         }
1684
1685         os_free(ext);
1686         return ret;
1687 }
1688
1689
1690 /**
1691  * wpa_driver_wext_set_key - Configure encryption key
1692  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1693  * @priv: Private driver interface data
1694  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1695  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1696  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1697  *      broadcast/default keys
1698  * @key_idx: key index (0..3), usually 0 for unicast keys
1699  * @set_tx: Configure this key as the default Tx key (only used when
1700  *      driver does not support separate unicast/individual key
1701  * @seq: Sequence number/packet number, seq_len octets, the next
1702  *      packet number to be used for in replay protection; configured
1703  *      for Rx keys (in most cases, this is only used with broadcast
1704  *      keys and set to zero for unicast keys)
1705  * @seq_len: Length of the seq, depends on the algorithm:
1706  *      TKIP: 6 octets, CCMP: 6 octets
1707  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1708  *      8-byte Rx Mic Key
1709  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1710  *      TKIP: 32, CCMP: 16)
1711  * Returns: 0 on success, -1 on failure
1712  *
1713  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1714  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1715  */
1716 int wpa_driver_wext_set_key(const char *ifname, void *priv, enum wpa_alg alg,
1717                             const u8 *addr, int key_idx,
1718                             int set_tx, const u8 *seq, size_t seq_len,
1719                             const u8 *key, size_t key_len)
1720 {
1721         struct wpa_driver_wext_data *drv = priv;
1722         struct iwreq iwr;
1723         int ret = 0;
1724
1725         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1726                    "key_len=%lu",
1727                    __FUNCTION__, alg, key_idx, set_tx,
1728                    (unsigned long) seq_len, (unsigned long) key_len);
1729
1730         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1731                                           seq, seq_len, key, key_len);
1732         if (ret == 0)
1733                 return 0;
1734
1735         if (ret == -2 &&
1736             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1737                 wpa_printf(MSG_DEBUG, "Driver did not support "
1738                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1739                 ret = 0;
1740         } else {
1741                 wpa_printf(MSG_DEBUG, "Driver did not support "
1742                            "SIOCSIWENCODEEXT");
1743                 return ret;
1744         }
1745
1746         os_memset(&iwr, 0, sizeof(iwr));
1747         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1748         iwr.u.encoding.flags = key_idx + 1;
1749         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1750         if (alg == WPA_ALG_NONE)
1751                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1752         iwr.u.encoding.pointer = (caddr_t) key;
1753         iwr.u.encoding.length = key_len;
1754
1755         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1756                 perror("ioctl[SIOCSIWENCODE]");
1757                 ret = -1;
1758         }
1759
1760         if (set_tx && alg != WPA_ALG_NONE) {
1761                 os_memset(&iwr, 0, sizeof(iwr));
1762                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1763                 iwr.u.encoding.flags = key_idx + 1;
1764                 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1765                 iwr.u.encoding.pointer = (caddr_t) NULL;
1766                 iwr.u.encoding.length = 0;
1767                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1768                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1769                         ret = -1;
1770                 }
1771         }
1772
1773         return ret;
1774 }
1775
1776
1777 static int wpa_driver_wext_set_countermeasures(void *priv,
1778                                                int enabled)
1779 {
1780         struct wpa_driver_wext_data *drv = priv;
1781         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1782         return wpa_driver_wext_set_auth_param(drv,
1783                                               IW_AUTH_TKIP_COUNTERMEASURES,
1784                                               enabled);
1785 }
1786
1787
1788 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1789                                                 int enabled)
1790 {
1791         struct wpa_driver_wext_data *drv = priv;
1792         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1793         drv->use_crypt = enabled;
1794         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1795                                               enabled);
1796 }
1797
1798
1799 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1800                                 const u8 *addr, int cmd, int reason_code)
1801 {
1802         struct iwreq iwr;
1803         struct iw_mlme mlme;
1804         int ret = 0;
1805
1806         os_memset(&iwr, 0, sizeof(iwr));
1807         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1808         os_memset(&mlme, 0, sizeof(mlme));
1809         mlme.cmd = cmd;
1810         mlme.reason_code = reason_code;
1811         mlme.addr.sa_family = ARPHRD_ETHER;
1812         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1813         iwr.u.data.pointer = (caddr_t) &mlme;
1814         iwr.u.data.length = sizeof(mlme);
1815
1816         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1817                 perror("ioctl[SIOCSIWMLME]");
1818                 ret = -1;
1819         }
1820
1821         return ret;
1822 }
1823
1824
1825 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
1826 {
1827         struct iwreq iwr;
1828         const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
1829         u8 ssid[32];
1830         int i;
1831
1832         /*
1833          * Only force-disconnect when the card is in infrastructure mode,
1834          * otherwise the driver might interpret the cleared BSSID and random
1835          * SSID as an attempt to create a new ad-hoc network.
1836          */
1837         os_memset(&iwr, 0, sizeof(iwr));
1838         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1839         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
1840                 perror("ioctl[SIOCGIWMODE]");
1841                 iwr.u.mode = IW_MODE_INFRA;
1842         }
1843
1844         if (iwr.u.mode == IW_MODE_INFRA) {
1845                 if (drv->cfg80211) {
1846                         /*
1847                          * cfg80211 supports SIOCSIWMLME commands, so there is
1848                          * no need for the random SSID hack, but clear the
1849                          * BSSID and SSID.
1850                          */
1851                         if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0 ||
1852                             wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
1853                                 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear "
1854                                            "to disconnect");
1855                         }
1856                         return;
1857                 }
1858                 /*
1859                  * Clear the BSSID selection and set a random SSID to make sure
1860                  * the driver will not be trying to associate with something
1861                  * even if it does not understand SIOCSIWMLME commands (or
1862                  * tries to associate automatically after deauth/disassoc).
1863                  */
1864                 for (i = 0; i < 32; i++)
1865                         ssid[i] = rand() & 0xFF;
1866                 if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0 ||
1867                     wpa_driver_wext_set_ssid(drv, ssid, 32) < 0) {
1868                         wpa_printf(MSG_DEBUG, "WEXT: Failed to set bogus "
1869                                    "BSSID/SSID to disconnect");
1870                 }
1871         }
1872 }
1873
1874
1875 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1876                                           int reason_code)
1877 {
1878         struct wpa_driver_wext_data *drv = priv;
1879         int ret;
1880         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1881         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1882         wpa_driver_wext_disconnect(drv);
1883         return ret;
1884 }
1885
1886
1887 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
1888                                         int reason_code)
1889 {
1890         struct wpa_driver_wext_data *drv = priv;
1891         int ret;
1892         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1893         ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC, reason_code);
1894         wpa_driver_wext_disconnect(drv);
1895         return ret;
1896 }
1897
1898
1899 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
1900                                       size_t ie_len)
1901 {
1902         struct wpa_driver_wext_data *drv = priv;
1903         struct iwreq iwr;
1904         int ret = 0;
1905
1906         os_memset(&iwr, 0, sizeof(iwr));
1907         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1908         iwr.u.data.pointer = (caddr_t) ie;
1909         iwr.u.data.length = ie_len;
1910
1911         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1912                 perror("ioctl[SIOCSIWGENIE]");
1913                 ret = -1;
1914         }
1915
1916         return ret;
1917 }
1918
1919
1920 int wpa_driver_wext_cipher2wext(int cipher)
1921 {
1922         switch (cipher) {
1923         case CIPHER_NONE:
1924                 return IW_AUTH_CIPHER_NONE;
1925         case CIPHER_WEP40:
1926                 return IW_AUTH_CIPHER_WEP40;
1927         case CIPHER_TKIP:
1928                 return IW_AUTH_CIPHER_TKIP;
1929         case CIPHER_CCMP:
1930                 return IW_AUTH_CIPHER_CCMP;
1931         case CIPHER_WEP104:
1932                 return IW_AUTH_CIPHER_WEP104;
1933         default:
1934                 return 0;
1935         }
1936 }
1937
1938
1939 int wpa_driver_wext_keymgmt2wext(int keymgmt)
1940 {
1941         switch (keymgmt) {
1942         case KEY_MGMT_802_1X:
1943         case KEY_MGMT_802_1X_NO_WPA:
1944                 return IW_AUTH_KEY_MGMT_802_1X;
1945         case KEY_MGMT_PSK:
1946                 return IW_AUTH_KEY_MGMT_PSK;
1947         default:
1948                 return 0;
1949         }
1950 }
1951
1952
1953 static int
1954 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
1955                                   struct wpa_driver_associate_params *params)
1956 {
1957         struct iwreq iwr;
1958         int ret = 0;
1959
1960         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1961                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1962
1963         os_memset(&iwr, 0, sizeof(iwr));
1964         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1965         /* Just changing mode, not actual keys */
1966         iwr.u.encoding.flags = 0;
1967         iwr.u.encoding.pointer = (caddr_t) NULL;
1968         iwr.u.encoding.length = 0;
1969
1970         /*
1971          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
1972          * different things. Here they are used to indicate Open System vs.
1973          * Shared Key authentication algorithm. However, some drivers may use
1974          * them to select between open/restricted WEP encrypted (open = allow
1975          * both unencrypted and encrypted frames; restricted = only allow
1976          * encrypted frames).
1977          */
1978
1979         if (!drv->use_crypt) {
1980                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1981         } else {
1982                 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
1983                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
1984                 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
1985                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
1986         }
1987
1988         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1989                 perror("ioctl[SIOCSIWENCODE]");
1990                 ret = -1;
1991         }
1992
1993         return ret;
1994 }
1995
1996
1997 int wpa_driver_wext_associate(void *priv,
1998                               struct wpa_driver_associate_params *params)
1999 {
2000         struct wpa_driver_wext_data *drv = priv;
2001         int ret = 0;
2002         int allow_unencrypted_eapol;
2003         int value;
2004
2005         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2006
2007         if (drv->cfg80211) {
2008                 /*
2009                  * Stop cfg80211 from trying to associate before we are done
2010                  * with all parameters.
2011                  */
2012                 wpa_driver_wext_set_ssid(drv, (u8 *) "", 0);
2013         }
2014
2015         if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
2016             < 0)
2017                 ret = -1;
2018         if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
2019                 ret = -1;
2020         if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2021                 ret = -1;
2022
2023         /*
2024          * If the driver did not support SIOCSIWAUTH, fallback to
2025          * SIOCSIWENCODE here.
2026          */
2027         if (drv->auth_alg_fallback &&
2028             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2029                 ret = -1;
2030
2031         if (!params->bssid &&
2032             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2033                 ret = -1;
2034
2035         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2036          * from configuration, not from here, where only the selected suite is
2037          * available */
2038         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2039             < 0)
2040                 ret = -1;
2041         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2042                 value = IW_AUTH_WPA_VERSION_DISABLED;
2043         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2044                 value = IW_AUTH_WPA_VERSION_WPA2;
2045         else
2046                 value = IW_AUTH_WPA_VERSION_WPA;
2047         if (wpa_driver_wext_set_auth_param(drv,
2048                                            IW_AUTH_WPA_VERSION, value) < 0)
2049                 ret = -1;
2050         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2051         if (wpa_driver_wext_set_auth_param(drv,
2052                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2053                 ret = -1;
2054         value = wpa_driver_wext_cipher2wext(params->group_suite);
2055         if (wpa_driver_wext_set_auth_param(drv,
2056                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2057                 ret = -1;
2058         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2059         if (wpa_driver_wext_set_auth_param(drv,
2060                                            IW_AUTH_KEY_MGMT, value) < 0)
2061                 ret = -1;
2062         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2063                 params->pairwise_suite != CIPHER_NONE ||
2064                 params->group_suite != CIPHER_NONE ||
2065                 params->wpa_ie_len;
2066         if (wpa_driver_wext_set_auth_param(drv,
2067                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2068                 ret = -1;
2069
2070         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2071          * not using WPA. IEEE 802.1X specifies that these frames are not
2072          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2073         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2074             params->key_mgmt_suite == KEY_MGMT_PSK)
2075                 allow_unencrypted_eapol = 0;
2076         else
2077                 allow_unencrypted_eapol = 1;
2078
2079         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2080                 ret = -1;
2081         if (wpa_driver_wext_set_auth_param(drv,
2082                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2083                                            allow_unencrypted_eapol) < 0)
2084                 ret = -1;
2085 #ifdef CONFIG_IEEE80211W
2086         switch (params->mgmt_frame_protection) {
2087         case NO_MGMT_FRAME_PROTECTION:
2088                 value = IW_AUTH_MFP_DISABLED;
2089                 break;
2090         case MGMT_FRAME_PROTECTION_OPTIONAL:
2091                 value = IW_AUTH_MFP_OPTIONAL;
2092                 break;
2093         case MGMT_FRAME_PROTECTION_REQUIRED:
2094                 value = IW_AUTH_MFP_REQUIRED;
2095                 break;
2096         };
2097         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2098                 ret = -1;
2099 #endif /* CONFIG_IEEE80211W */
2100         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2101                 ret = -1;
2102         if (!drv->cfg80211 &&
2103             wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2104                 ret = -1;
2105         if (params->bssid &&
2106             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2107                 ret = -1;
2108         if (drv->cfg80211 &&
2109             wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2110                 ret = -1;
2111
2112         return ret;
2113 }
2114
2115
2116 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2117 {
2118         struct wpa_driver_wext_data *drv = priv;
2119         int algs = 0, res;
2120
2121         if (auth_alg & WPA_AUTH_ALG_OPEN)
2122                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2123         if (auth_alg & WPA_AUTH_ALG_SHARED)
2124                 algs |= IW_AUTH_ALG_SHARED_KEY;
2125         if (auth_alg & WPA_AUTH_ALG_LEAP)
2126                 algs |= IW_AUTH_ALG_LEAP;
2127         if (algs == 0) {
2128                 /* at least one algorithm should be set */
2129                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2130         }
2131
2132         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2133                                              algs);
2134         drv->auth_alg_fallback = res == -2;
2135         return res;
2136 }
2137
2138
2139 /**
2140  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2141  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2142  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2143  * Returns: 0 on success, -1 on failure
2144  */
2145 int wpa_driver_wext_set_mode(void *priv, int mode)
2146 {
2147         struct wpa_driver_wext_data *drv = priv;
2148         struct iwreq iwr;
2149         int ret = -1;
2150         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2151
2152         os_memset(&iwr, 0, sizeof(iwr));
2153         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2154         iwr.u.mode = new_mode;
2155         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2156                 ret = 0;
2157                 goto done;
2158         }
2159
2160         if (errno != EBUSY) {
2161                 perror("ioctl[SIOCSIWMODE]");
2162                 goto done;
2163         }
2164
2165         /* mac80211 doesn't allow mode changes while the device is up, so if
2166          * the device isn't in the mode we're about to change to, take device
2167          * down, try to set the mode again, and bring it back up.
2168          */
2169         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2170                 perror("ioctl[SIOCGIWMODE]");
2171                 goto done;
2172         }
2173
2174         if (iwr.u.mode == new_mode) {
2175                 ret = 0;
2176                 goto done;
2177         }
2178
2179         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
2180                 /* Try to set the mode again while the interface is down */
2181                 iwr.u.mode = new_mode;
2182                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2183                         perror("ioctl[SIOCSIWMODE]");
2184                 else
2185                         ret = 0;
2186
2187                 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1);
2188         }
2189
2190 done:
2191         return ret;
2192 }
2193
2194
2195 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2196                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2197 {
2198         struct iwreq iwr;
2199         struct iw_pmksa pmksa;
2200         int ret = 0;
2201
2202         os_memset(&iwr, 0, sizeof(iwr));
2203         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2204         os_memset(&pmksa, 0, sizeof(pmksa));
2205         pmksa.cmd = cmd;
2206         pmksa.bssid.sa_family = ARPHRD_ETHER;
2207         if (bssid)
2208                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2209         if (pmkid)
2210                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2211         iwr.u.data.pointer = (caddr_t) &pmksa;
2212         iwr.u.data.length = sizeof(pmksa);
2213
2214         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2215                 if (errno != EOPNOTSUPP)
2216                         perror("ioctl[SIOCSIWPMKSA]");
2217                 ret = -1;
2218         }
2219
2220         return ret;
2221 }
2222
2223
2224 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2225                                      const u8 *pmkid)
2226 {
2227         struct wpa_driver_wext_data *drv = priv;
2228         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2229 }
2230
2231
2232 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2233                                         const u8 *pmkid)
2234 {
2235         struct wpa_driver_wext_data *drv = priv;
2236         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2237 }
2238
2239
2240 static int wpa_driver_wext_flush_pmkid(void *priv)
2241 {
2242         struct wpa_driver_wext_data *drv = priv;
2243         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2244 }
2245
2246
2247 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2248 {
2249         struct wpa_driver_wext_data *drv = priv;
2250         if (!drv->has_capability)
2251                 return -1;
2252         os_memcpy(capa, &drv->capa, sizeof(*capa));
2253         return 0;
2254 }
2255
2256
2257 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2258                                         const char *ifname)
2259 {
2260         if (ifname == NULL) {
2261                 drv->ifindex2 = -1;
2262                 return 0;
2263         }
2264
2265         drv->ifindex2 = if_nametoindex(ifname);
2266         if (drv->ifindex2 <= 0)
2267                 return -1;
2268
2269         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2270                    "wireless events", drv->ifindex2, ifname);
2271
2272         return 0;
2273 }
2274
2275
2276 int wpa_driver_wext_set_operstate(void *priv, int state)
2277 {
2278         struct wpa_driver_wext_data *drv = priv;
2279
2280         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2281                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2282         drv->operstate = state;
2283         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
2284                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
2285 }
2286
2287
2288 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2289 {
2290         return drv->we_version_compiled;
2291 }
2292
2293
2294 static const char * wext_get_radio_name(void *priv)
2295 {
2296         struct wpa_driver_wext_data *drv = priv;
2297         return drv->phyname;
2298 }
2299
2300
2301 const struct wpa_driver_ops wpa_driver_wext_ops = {
2302         .name = "wext",
2303         .desc = "Linux wireless extensions (generic)",
2304         .get_bssid = wpa_driver_wext_get_bssid,
2305         .get_ssid = wpa_driver_wext_get_ssid,
2306         .set_key = wpa_driver_wext_set_key,
2307         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2308         .scan2 = wpa_driver_wext_scan,
2309         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2310         .deauthenticate = wpa_driver_wext_deauthenticate,
2311         .disassociate = wpa_driver_wext_disassociate,
2312         .associate = wpa_driver_wext_associate,
2313         .init = wpa_driver_wext_init,
2314         .deinit = wpa_driver_wext_deinit,
2315         .add_pmkid = wpa_driver_wext_add_pmkid,
2316         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2317         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2318         .get_capa = wpa_driver_wext_get_capa,
2319         .set_operstate = wpa_driver_wext_set_operstate,
2320         .get_radio_name = wext_get_radio_name,
2321 };