src/drivers/driver_wext.c

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