src/drivers/driver_wext.c

   1 /*
   2  * WPA Supplicant - driver interaction with generic Linux Wireless Extensions
   3  * Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements a driver interface for the Linux Wireless Extensions.
  15  * When used with WE-18 or newer, this interface can be used as-is with number
  16  * of drivers. In addition to this, some of the common functions in this file
  17  * can be used by other driver interface implementations that use generic WE
  18  * ioctls, but require private ioctls for some of the functionality.
  19  */
  20
  21 #include "includes.h"
  22 #include <sys/ioctl.h>
  23 #include <net/if_arp.h>
  24
  25 #include "wireless_copy.h"
  26 #include "common.h"
  27 #include "driver.h"
  28 #include "eloop.h"
  29 #include "priv_netlink.h"
  30 #include "driver_wext.h"
  31 #include "ieee802_11_defs.h"
  32 #include "wpa_common.h"
  33
  34
  35 static int wpa_driver_wext_flush_pmkid(void *priv);
  36 static int wpa_driver_wext_get_range(void *priv);
  37 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
  38
  39
  40 static int wpa_driver_wext_send_oper_ifla(struct wpa_driver_wext_data *drv,
  41                                           int linkmode, int operstate)
  42 {
  43         struct {
  44                 struct nlmsghdr hdr;
  45                 struct ifinfomsg ifinfo;
  46                 char opts[16];
  47         } req;
  48         struct rtattr *rta;
  49         static int nl_seq;
  50         ssize_t ret;
  51
  52         os_memset(&req, 0, sizeof(req));
  53
  54         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
  55         req.hdr.nlmsg_type = RTM_SETLINK;
  56         req.hdr.nlmsg_flags = NLM_F_REQUEST;
  57         req.hdr.nlmsg_seq = ++nl_seq;
  58         req.hdr.nlmsg_pid = 0;
  59
  60         req.ifinfo.ifi_family = AF_UNSPEC;
  61         req.ifinfo.ifi_type = 0;
  62         req.ifinfo.ifi_index = drv->ifindex;
  63         req.ifinfo.ifi_flags = 0;
  64         req.ifinfo.ifi_change = 0;
  65
  66         if (linkmode != -1) {
  67                 rta = (struct rtattr *)
  68                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
  69                 rta->rta_type = IFLA_LINKMODE;
  70                 rta->rta_len = RTA_LENGTH(sizeof(char));
  71                 *((char *) RTA_DATA(rta)) = linkmode;
  72                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
  73                         RTA_LENGTH(sizeof(char));
  74         }
  75         if (operstate != -1) {
  76                 rta = (struct rtattr *)
  77                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
  78                 rta->rta_type = IFLA_OPERSTATE;
  79                 rta->rta_len = RTA_LENGTH(sizeof(char));
  80                 *((char *) RTA_DATA(rta)) = operstate;
  81                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
  82                         RTA_LENGTH(sizeof(char));
  83         }
  84
  85         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
  86                    linkmode, operstate);
  87
  88         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
  89         if (ret < 0) {
  90                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
  91                            "%s (assume operstate is not supported)",
  92                            strerror(errno));
  93         }
  94
  95         return ret < 0 ? -1 : 0;
  96 }
  97
  98
  99 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
 100                                    int idx, u32 value)
 101 {
 102         struct iwreq iwr;
 103         int ret = 0;
 104
 105         os_memset(&iwr, 0, sizeof(iwr));
 106         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 107         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 108         iwr.u.param.value = value;
 109
 110         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 111                 if (errno != EOPNOTSUPP) {
 112                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 113                                    "value 0x%x) failed: %s)",
 114                                    idx, value, strerror(errno));
 115                 }
 116                 ret = errno == EOPNOTSUPP ? -2 : -1;
 117         }
 118
 119         return ret;
 120 }
 121
 122
 123 /**
 124  * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
 125  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 126  * @bssid: Buffer for BSSID
 127  * Returns: 0 on success, -1 on failure
 128  */
 129 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
 130 {
 131         struct wpa_driver_wext_data *drv = priv;
 132         struct iwreq iwr;
 133         int ret = 0;
 134
 135         os_memset(&iwr, 0, sizeof(iwr));
 136         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 137
 138         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 139                 perror("ioctl[SIOCGIWAP]");
 140                 ret = -1;
 141         }
 142         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 143
 144         return ret;
 145 }
 146
 147
 148 /**
 149  * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
 150  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 151  * @bssid: BSSID
 152  * Returns: 0 on success, -1 on failure
 153  */
 154 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
 155 {
 156         struct wpa_driver_wext_data *drv = priv;
 157         struct iwreq iwr;
 158         int ret = 0;
 159
 160         os_memset(&iwr, 0, sizeof(iwr));
 161         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 162         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 163         if (bssid)
 164                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 165         else
 166                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 167
 168         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 169                 perror("ioctl[SIOCSIWAP]");
 170                 ret = -1;
 171         }
 172
 173         return ret;
 174 }
 175
 176
 177 /**
 178  * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
 179  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 180  * @ssid: Buffer for the SSID; must be at least 32 bytes long
 181  * Returns: SSID length on success, -1 on failure
 182  */
 183 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
 184 {
 185         struct wpa_driver_wext_data *drv = priv;
 186         struct iwreq iwr;
 187         int ret = 0;
 188
 189         os_memset(&iwr, 0, sizeof(iwr));
 190         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 191         iwr.u.essid.pointer = (caddr_t) ssid;
 192         iwr.u.essid.length = 32;
 193
 194         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 195                 perror("ioctl[SIOCGIWESSID]");
 196                 ret = -1;
 197         } else {
 198                 ret = iwr.u.essid.length;
 199                 if (ret > 32)
 200                         ret = 32;
 201                 /* Some drivers include nul termination in the SSID, so let's
 202                  * remove it here before further processing. WE-21 changes this
 203                  * to explicitly require the length _not_ to include nul
 204                  * termination. */
 205                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 206                     drv->we_version_compiled < 21)
 207                         ret--;
 208         }
 209
 210         return ret;
 211 }
 212
 213
 214 /**
 215  * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
 216  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 217  * @ssid: SSID
 218  * @ssid_len: Length of SSID (0..32)
 219  * Returns: 0 on success, -1 on failure
 220  */
 221 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
 222 {
 223         struct wpa_driver_wext_data *drv = priv;
 224         struct iwreq iwr;
 225         int ret = 0;
 226         char buf[33];
 227
 228         if (ssid_len > 32)
 229                 return -1;
 230
 231         os_memset(&iwr, 0, sizeof(iwr));
 232         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 233         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 234         iwr.u.essid.flags = (ssid_len != 0);
 235         os_memset(buf, 0, sizeof(buf));
 236         os_memcpy(buf, ssid, ssid_len);
 237         iwr.u.essid.pointer = (caddr_t) buf;
 238         if (drv->we_version_compiled < 21) {
 239                 /* For historic reasons, set SSID length to include one extra
 240                  * character, C string nul termination, even though SSID is
 241                  * really an octet string that should not be presented as a C
 242                  * string. Some Linux drivers decrement the length by one and
 243                  * can thus end up missing the last octet of the SSID if the
 244                  * length is not incremented here. WE-21 changes this to
 245                  * explicitly require the length _not_ to include nul
 246                  * termination. */
 247                 if (ssid_len)
 248                         ssid_len++;
 249         }
 250         iwr.u.essid.length = ssid_len;
 251
 252         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 253                 perror("ioctl[SIOCSIWESSID]");
 254                 ret = -1;
 255         }
 256
 257         return ret;
 258 }
 259
 260
 261 /**
 262  * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
 263  * @priv: Pointer to private wext data from wpa_driver_wext_init()
 264  * @freq: Frequency in MHz
 265  * Returns: 0 on success, -1 on failure
 266  */
 267 int wpa_driver_wext_set_freq(void *priv, int freq)
 268 {
 269         struct wpa_driver_wext_data *drv = priv;
 270         struct iwreq iwr;
 271         int ret = 0;
 272
 273         os_memset(&iwr, 0, sizeof(iwr));
 274         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 275         iwr.u.freq.m = freq * 100000;
 276         iwr.u.freq.e = 1;
 277
 278         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 279                 perror("ioctl[SIOCSIWFREQ]");
 280                 ret = -1;
 281         }
 282
 283         return ret;
 284 }
 285
 286
 287 static void
 288 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
 289 {
 290         union wpa_event_data data;
 291
 292         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 293                    custom);
 294
 295         os_memset(&data, 0, sizeof(data));
 296         /* Host AP driver */
 297         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 298                 data.michael_mic_failure.unicast =
 299                         os_strstr(custom, " unicast ") != NULL;
 300                 /* TODO: parse parameters(?) */
 301                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 302         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 303                 char *spos;
 304                 int bytes;
 305
 306                 spos = custom + 17;
 307
 308                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 309                 if (!bytes || (bytes & 1))
 310                         return;
 311                 bytes /= 2;
 312
 313                 data.assoc_info.req_ies = os_malloc(bytes);
 314                 if (data.assoc_info.req_ies == NULL)
 315                         return;
 316
 317                 data.assoc_info.req_ies_len = bytes;
 318                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 319
 320                 spos += bytes * 2;
 321
 322                 data.assoc_info.resp_ies = NULL;
 323                 data.assoc_info.resp_ies_len = 0;
 324
 325                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 326                         spos += 9;
 327
 328                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 329                         if (!bytes || (bytes & 1))
 330                                 goto done;
 331                         bytes /= 2;
 332
 333                         data.assoc_info.resp_ies = os_malloc(bytes);
 334                         if (data.assoc_info.resp_ies == NULL)
 335                                 goto done;
 336
 337                         data.assoc_info.resp_ies_len = bytes;
 338                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 339                 }
 340
 341                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 342
 343         done:
 344                 os_free(data.assoc_info.resp_ies);
 345                 os_free(data.assoc_info.req_ies);
 346 #ifdef CONFIG_PEERKEY
 347         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 348                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 349                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 350                                    "STKSTART.request '%s'", custom + 17);
 351                         return;
 352                 }
 353                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 354 #endif /* CONFIG_PEERKEY */
 355         }
 356 }
 357
 358
 359 static int wpa_driver_wext_event_wireless_michaelmicfailure(
 360         void *ctx, const char *ev, size_t len)
 361 {
 362         const struct iw_michaelmicfailure *mic;
 363         union wpa_event_data data;
 364
 365         if (len < sizeof(*mic))
 366                 return -1;
 367
 368         mic = (const struct iw_michaelmicfailure *) ev;
 369
 370         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 371                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 372                    MAC2STR(mic->src_addr.sa_data));
 373
 374         os_memset(&data, 0, sizeof(data));
 375         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 376         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 377
 378         return 0;
 379 }
 380
 381
 382 static int wpa_driver_wext_event_wireless_pmkidcand(
 383         struct wpa_driver_wext_data *drv, const char *ev, size_t len)
 384 {
 385         const struct iw_pmkid_cand *cand;
 386         union wpa_event_data data;
 387         const u8 *addr;
 388
 389         if (len < sizeof(*cand))
 390                 return -1;
 391
 392         cand = (const struct iw_pmkid_cand *) ev;
 393         addr = (const u8 *) cand->bssid.sa_data;
 394
 395         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 396                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 397                    cand->index, MAC2STR(addr));
 398
 399         os_memset(&data, 0, sizeof(data));
 400         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 401         data.pmkid_candidate.index = cand->index;
 402         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 403         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 404
 405         return 0;
 406 }
 407
 408
 409 static int wpa_driver_wext_event_wireless_assocreqie(
 410         struct wpa_driver_wext_data *drv, const char *ev, int len)
 411 {
 412         if (len < 0)
 413                 return -1;
 414
 415         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 416                     len);
 417         os_free(drv->assoc_req_ies);
 418         drv->assoc_req_ies = os_malloc(len);
 419         if (drv->assoc_req_ies == NULL) {
 420                 drv->assoc_req_ies_len = 0;
 421                 return -1;
 422         }
 423         os_memcpy(drv->assoc_req_ies, ev, len);
 424         drv->assoc_req_ies_len = len;
 425
 426         return 0;
 427 }
 428
 429
 430 static int wpa_driver_wext_event_wireless_assocrespie(
 431         struct wpa_driver_wext_data *drv, const char *ev, int len)
 432 {
 433         if (len < 0)
 434                 return -1;
 435
 436         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 437                     len);
 438         os_free(drv->assoc_resp_ies);
 439         drv->assoc_resp_ies = os_malloc(len);
 440         if (drv->assoc_resp_ies == NULL) {
 441                 drv->assoc_resp_ies_len = 0;
 442                 return -1;
 443         }
 444         os_memcpy(drv->assoc_resp_ies, ev, len);
 445         drv->assoc_resp_ies_len = len;
 446
 447         return 0;
 448 }
 449
 450
 451 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
 452 {
 453         union wpa_event_data data;
 454
 455         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 456                 return;
 457
 458         os_memset(&data, 0, sizeof(data));
 459         if (drv->assoc_req_ies) {
 460                 data.assoc_info.req_ies = drv->assoc_req_ies;
 461                 drv->assoc_req_ies = NULL;
 462                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 463         }
 464         if (drv->assoc_resp_ies) {
 465                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 466                 drv->assoc_resp_ies = NULL;
 467                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 468         }
 469
 470         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 471
 472         os_free(data.assoc_info.req_ies);
 473         os_free(data.assoc_info.resp_ies);
 474 }
 475
 476
 477 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
 478                                            void *ctx, char *data, int len)
 479 {
 480         struct iw_event iwe_buf, *iwe = &iwe_buf;
 481         char *pos, *end, *custom, *buf;
 482
 483         pos = data;
 484         end = data + len;
 485
 486         while (pos + IW_EV_LCP_LEN <= end) {
 487                 /* Event data may be unaligned, so make a local, aligned copy
 488                  * before processing. */
 489                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 490                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 491                            iwe->cmd, iwe->len);
 492                 if (iwe->len <= IW_EV_LCP_LEN)
 493                         return;
 494
 495                 custom = pos + IW_EV_POINT_LEN;
 496                 if (drv->we_version_compiled > 18 &&
 497                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 498                      iwe->cmd == IWEVCUSTOM ||
 499                      iwe->cmd == IWEVASSOCREQIE ||
 500                      iwe->cmd == IWEVASSOCRESPIE ||
 501                      iwe->cmd == IWEVPMKIDCAND)) {
 502                         /* WE-19 removed the pointer from struct iw_point */
 503                         char *dpos = (char *) &iwe_buf.u.data.length;
 504                         int dlen = dpos - (char *) &iwe_buf;
 505                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 506                                   sizeof(struct iw_event) - dlen);
 507                 } else {
 508                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 509                         custom += IW_EV_POINT_OFF;
 510                 }
 511
 512                 switch (iwe->cmd) {
 513                 case SIOCGIWAP:
 514                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 515                                    MACSTR,
 516                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 517                         if (is_zero_ether_addr(
 518                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 519                             os_memcmp(iwe->u.ap_addr.sa_data,
 520                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 521                             0) {
 522                                 os_free(drv->assoc_req_ies);
 523                                 drv->assoc_req_ies = NULL;
 524                                 os_free(drv->assoc_resp_ies);
 525                                 drv->assoc_resp_ies = NULL;
 526                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 527                                                      NULL);
 528
 529                         } else {
 530                                 wpa_driver_wext_event_assoc_ies(drv);
 531                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 532                         }
 533                         break;
 534                 case IWEVMICHAELMICFAILURE:
 535                         if (custom + iwe->u.data.length > end) {
 536                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 537                                            "IWEVMICHAELMICFAILURE length");
 538                                 return;
 539                         }
 540                         wpa_driver_wext_event_wireless_michaelmicfailure(
 541                                 ctx, custom, iwe->u.data.length);
 542                         break;
 543                 case IWEVCUSTOM:
 544                         if (custom + iwe->u.data.length > end) {
 545                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 546                                            "IWEVCUSTOM length");
 547                                 return;
 548                         }
 549                         buf = os_malloc(iwe->u.data.length + 1);
 550                         if (buf == NULL)
 551                                 return;
 552                         os_memcpy(buf, custom, iwe->u.data.length);
 553                         buf[iwe->u.data.length] = '\0';
 554                         wpa_driver_wext_event_wireless_custom(ctx, buf);
 555                         os_free(buf);
 556                         break;
 557                 case SIOCGIWSCAN:
 558                         drv->scan_complete_events = 1;
 559                         eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
 560                                              drv, ctx);
 561                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 562                         break;
 563                 case IWEVASSOCREQIE:
 564                         if (custom + iwe->u.data.length > end) {
 565                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 566                                            "IWEVASSOCREQIE length");
 567                                 return;
 568                         }
 569                         wpa_driver_wext_event_wireless_assocreqie(
 570                                 drv, custom, iwe->u.data.length);
 571                         break;
 572                 case IWEVASSOCRESPIE:
 573                         if (custom + iwe->u.data.length > end) {
 574                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 575                                            "IWEVASSOCRESPIE length");
 576                                 return;
 577                         }
 578                         wpa_driver_wext_event_wireless_assocrespie(
 579                                 drv, custom, iwe->u.data.length);
 580                         break;
 581                 case IWEVPMKIDCAND:
 582                         if (custom + iwe->u.data.length > end) {
 583                                 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
 584                                            "IWEVPMKIDCAND length");
 585                                 return;
 586                         }
 587                         wpa_driver_wext_event_wireless_pmkidcand(
 588                                 drv, custom, iwe->u.data.length);
 589                         break;
 590                 }
 591
 592                 pos += iwe->len;
 593         }
 594 }
 595
 596
 597 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
 598                                        void *ctx, char *buf, size_t len,
 599                                        int del)
 600 {
 601         union wpa_event_data event;
 602
 603         os_memset(&event, 0, sizeof(event));
 604         if (len > sizeof(event.interface_status.ifname))
 605                 len = sizeof(event.interface_status.ifname) - 1;
 606         os_memcpy(event.interface_status.ifname, buf, len);
 607         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 608                 EVENT_INTERFACE_ADDED;
 609
 610         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 611                    del ? "DEL" : "NEW",
 612                    event.interface_status.ifname,
 613                    del ? "removed" : "added");
 614
 615         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 616                 if (del)
 617                         drv->if_removed = 1;
 618                 else
 619                         drv->if_removed = 0;
 620         }
 621
 622         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 623 }
 624
 625
 626 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
 627                                       struct nlmsghdr *h)
 628 {
 629         struct ifinfomsg *ifi;
 630         int attrlen, nlmsg_len, rta_len;
 631         struct rtattr *attr;
 632
 633         ifi = NLMSG_DATA(h);
 634
 635         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 636
 637         attrlen = h->nlmsg_len - nlmsg_len;
 638         if (attrlen < 0)
 639                 return 0;
 640
 641         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 642
 643         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 644         while (RTA_OK(attr, attrlen)) {
 645                 if (attr->rta_type == IFLA_IFNAME) {
 646                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 647                             == 0)
 648                                 return 1;
 649                         else
 650                                 break;
 651                 }
 652                 attr = RTA_NEXT(attr, attrlen);
 653         }
 654
 655         return 0;
 656 }
 657
 658
 659 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
 660                                        int ifindex, struct nlmsghdr *h)
 661 {
 662         if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
 663                 return 1;
 664
 665         if (drv->if_removed && wpa_driver_wext_own_ifname(drv, h)) {
 666                 drv->ifindex = if_nametoindex(drv->ifname);
 667                 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
 668                            "interface");
 669                 wpa_driver_wext_finish_drv_init(drv);
 670                 return 1;
 671         }
 672
 673         return 0;
 674 }
 675
 676
 677 static void wpa_driver_wext_event_rtm_newlink(struct wpa_driver_wext_data *drv,
 678                                               void *ctx, struct nlmsghdr *h,
 679                                               size_t len)
 680 {
 681         struct ifinfomsg *ifi;
 682         int attrlen, nlmsg_len, rta_len;
 683         struct rtattr * attr;
 684
 685         if (len < sizeof(*ifi))
 686                 return;
 687
 688         ifi = NLMSG_DATA(h);
 689
 690         if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, h)) {
 691                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 692                            ifi->ifi_index);
 693                 return;
 694         }
 695
 696         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 697                    "(%s%s%s%s)",
 698                    drv->operstate, ifi->ifi_flags,
 699                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 700                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 701                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 702                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 703         /*
 704          * Some drivers send the association event before the operup event--in
 705          * this case, lifting operstate in wpa_driver_wext_set_operstate()
 706          * fails. This will hit us when wpa_supplicant does not need to do
 707          * IEEE 802.1X authentication
 708          */
 709         if (drv->operstate == 1 &&
 710             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 711             !(ifi->ifi_flags & IFF_RUNNING))
 712                 wpa_driver_wext_send_oper_ifla(drv, -1, IF_OPER_UP);
 713
 714         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 715
 716         attrlen = h->nlmsg_len - nlmsg_len;
 717         if (attrlen < 0)
 718                 return;
 719
 720         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 721
 722         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 723         while (RTA_OK(attr, attrlen)) {
 724                 if (attr->rta_type == IFLA_WIRELESS) {
 725                         wpa_driver_wext_event_wireless(
 726                                 drv, ctx, ((char *) attr) + rta_len,
 727                                 attr->rta_len - rta_len);
 728                 } else if (attr->rta_type == IFLA_IFNAME) {
 729                         wpa_driver_wext_event_link(drv, ctx,
 730                                                    ((char *) attr) + rta_len,
 731                                                    attr->rta_len - rta_len, 0);
 732                 }
 733                 attr = RTA_NEXT(attr, attrlen);
 734         }
 735 }
 736
 737
 738 static void wpa_driver_wext_event_rtm_dellink(struct wpa_driver_wext_data *drv,
 739                                               void *ctx, struct nlmsghdr *h,
 740                                               size_t len)
 741 {
 742         struct ifinfomsg *ifi;
 743         int attrlen, nlmsg_len, rta_len;
 744         struct rtattr * attr;
 745
 746         if (len < sizeof(*ifi))
 747                 return;
 748
 749         ifi = NLMSG_DATA(h);
 750
 751         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 752
 753         attrlen = h->nlmsg_len - nlmsg_len;
 754         if (attrlen < 0)
 755                 return;
 756
 757         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 758
 759         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 760         while (RTA_OK(attr, attrlen)) {
 761                 if (attr->rta_type == IFLA_IFNAME) {
 762                         wpa_driver_wext_event_link(drv,  ctx,
 763                                                    ((char *) attr) + rta_len,
 764                                                    attr->rta_len - rta_len, 1);
 765                 }
 766                 attr = RTA_NEXT(attr, attrlen);
 767         }
 768 }
 769
 770
 771 static void wpa_driver_wext_event_receive(int sock, void *eloop_ctx,
 772                                           void *sock_ctx)
 773 {
 774         char buf[8192];
 775         int left;
 776         struct sockaddr_nl from;
 777         socklen_t fromlen;
 778         struct nlmsghdr *h;
 779         int max_events = 10;
 780
 781 try_again:
 782         fromlen = sizeof(from);
 783         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 784                         (struct sockaddr *) &from, &fromlen);
 785         if (left < 0) {
 786                 if (errno != EINTR && errno != EAGAIN)
 787                         perror("recvfrom(netlink)");
 788                 return;
 789         }
 790
 791         h = (struct nlmsghdr *) buf;
 792         while (left >= (int) sizeof(*h)) {
 793                 int len, plen;
 794
 795                 len = h->nlmsg_len;
 796                 plen = len - sizeof(*h);
 797                 if (len > left || plen < 0) {
 798                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 799                                    "len=%d left=%d plen=%d",
 800                                    len, left, plen);
 801                         break;
 802                 }
 803
 804                 switch (h->nlmsg_type) {
 805                 case RTM_NEWLINK:
 806                         wpa_driver_wext_event_rtm_newlink(eloop_ctx, sock_ctx,
 807                                                           h, plen);
 808                         break;
 809                 case RTM_DELLINK:
 810                         wpa_driver_wext_event_rtm_dellink(eloop_ctx, sock_ctx,
 811                                                           h, plen);
 812                         break;
 813                 }
 814
 815                 len = NLMSG_ALIGN(len);
 816                 left -= len;
 817                 h = (struct nlmsghdr *) ((char *) h + len);
 818         }
 819
 820         if (left > 0) {
 821                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 822                            "message", left);
 823         }
 824
 825         if (--max_events > 0) {
 826                 /*
 827                  * Try to receive all events in one eloop call in order to
 828                  * limit race condition on cases where AssocInfo event, Assoc
 829                  * event, and EAPOL frames are received more or less at the
 830                  * same time. We want to process the event messages first
 831                  * before starting EAPOL processing.
 832                  */
 833                 goto try_again;
 834         }
 835 }
 836
 837
 838 static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
 839                                               const char *ifname, int *flags)
 840 {
 841         struct ifreq ifr;
 842
 843         os_memset(&ifr, 0, sizeof(ifr));
 844         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 845         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 846                 perror("ioctl[SIOCGIFFLAGS]");
 847                 return -1;
 848         }
 849         *flags = ifr.ifr_flags & 0xffff;
 850         return 0;
 851 }
 852
 853
 854 /**
 855  * wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 856  * @drv: driver_wext private data
 857  * @flags: Pointer to returned flags value
 858  * Returns: 0 on success, -1 on failure
 859  */
 860 int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
 861 {
 862         return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
 863 }
 864
 865
 866 static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
 867                                               const char *ifname, int flags)
 868 {
 869         struct ifreq ifr;
 870
 871         os_memset(&ifr, 0, sizeof(ifr));
 872         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 873         ifr.ifr_flags = flags & 0xffff;
 874         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 875                 perror("SIOCSIFFLAGS");
 876                 return -1;
 877         }
 878         return 0;
 879 }
 880
 881
 882 /**
 883  * wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 884  * @drv: driver_wext private data
 885  * @flags: New value for flags
 886  * Returns: 0 on success, -1 on failure
 887  */
 888 int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
 889 {
 890         return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
 891 }
 892
 893
 894 /**
 895  * wpa_driver_wext_init - Initialize WE driver interface
 896  * @ctx: context to be used when calling wpa_supplicant functions,
 897  * e.g., wpa_supplicant_event()
 898  * @ifname: interface name, e.g., wlan0
 899  * Returns: Pointer to private data, %NULL on failure
 900  */
 901 void * wpa_driver_wext_init(void *ctx, const char *ifname)
 902 {
 903         int s;
 904         struct sockaddr_nl local;
 905         struct wpa_driver_wext_data *drv;
 906
 907         drv = os_zalloc(sizeof(*drv));
 908         if (drv == NULL)
 909                 return NULL;
 910         drv->ctx = ctx;
 911         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 912
 913         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 914         if (drv->ioctl_sock < 0) {
 915                 perror("socket(PF_INET,SOCK_DGRAM)");
 916                 os_free(drv);
 917                 return NULL;
 918         }
 919
 920         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 921         if (s < 0) {
 922                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
 923                 close(drv->ioctl_sock);
 924                 os_free(drv);
 925                 return NULL;
 926         }
 927
 928         os_memset(&local, 0, sizeof(local));
 929         local.nl_family = AF_NETLINK;
 930         local.nl_groups = RTMGRP_LINK;
 931         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
 932                 perror("bind(netlink)");
 933                 close(s);
 934                 close(drv->ioctl_sock);
 935                 os_free(drv);
 936                 return NULL;
 937         }
 938
 939         eloop_register_read_sock(s, wpa_driver_wext_event_receive, drv, ctx);
 940         drv->event_sock = s;
 941
 942         drv->mlme_sock = -1;
 943
 944         wpa_driver_wext_finish_drv_init(drv);
 945
 946         return drv;
 947 }
 948
 949
 950 static void wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
 951 {
 952         int flags;
 953
 954         if (wpa_driver_wext_get_ifflags(drv, &flags) != 0)
 955                 printf("Could not get interface '%s' flags\n", drv->ifname);
 956         else if (!(flags & IFF_UP)) {
 957                 if (wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
 958                         printf("Could not set interface '%s' UP\n",
 959                                drv->ifname);
 960                 } else {
 961                         /*
 962                          * Wait some time to allow driver to initialize before
 963                          * starting configuring the driver. This seems to be
 964                          * needed at least some drivers that load firmware etc.
 965                          * when the interface is set up.
 966                          */
 967                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
 968                                    "a second for the driver to complete "
 969                                    "initialization", drv->ifname);
 970                         sleep(1);
 971                 }
 972         }
 973
 974         /*
 975          * Make sure that the driver does not have any obsolete PMKID entries.
 976          */
 977         wpa_driver_wext_flush_pmkid(drv);
 978
 979         if (wpa_driver_wext_set_mode(drv, 0) < 0) {
 980                 printf("Could not configure driver to use managed mode\n");
 981         }
 982
 983         wpa_driver_wext_get_range(drv);
 984
 985         drv->ifindex = if_nametoindex(drv->ifname);
 986
 987         if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
 988                 /*
 989                  * Host AP driver may use both wlan# and wifi# interface in
 990                  * wireless events. Since some of the versions included WE-18
 991                  * support, let's add the alternative ifindex also from
 992                  * driver_wext.c for the time being. This may be removed at
 993                  * some point once it is believed that old versions of the
 994                  * driver are not in use anymore.
 995                  */
 996                 char ifname2[IFNAMSIZ + 1];
 997                 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
 998                 os_memcpy(ifname2, "wifi", 4);
 999                 wpa_driver_wext_alternative_ifindex(drv, ifname2);
1000         }
1001
1002         wpa_driver_wext_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1003 }
1004
1005
1006 /**
1007  * wpa_driver_wext_deinit - Deinitialize WE driver interface
1008  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1009  *
1010  * Shut down driver interface and processing of driver events. Free
1011  * private data buffer if one was allocated in wpa_driver_wext_init().
1012  */
1013 void wpa_driver_wext_deinit(void *priv)
1014 {
1015         struct wpa_driver_wext_data *drv = priv;
1016         int flags;
1017
1018         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1019
1020         /*
1021          * Clear possibly configured driver parameters in order to make it
1022          * easier to use the driver after wpa_supplicant has been terminated.
1023          */
1024         (void) wpa_driver_wext_set_bssid(drv,
1025                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1026
1027         wpa_driver_wext_send_oper_ifla(priv, 0, IF_OPER_UP);
1028
1029         eloop_unregister_read_sock(drv->event_sock);
1030         if (drv->mlme_sock >= 0)
1031                 eloop_unregister_read_sock(drv->mlme_sock);
1032
1033         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
1034                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
1035
1036         close(drv->event_sock);
1037         close(drv->ioctl_sock);
1038         if (drv->mlme_sock >= 0)
1039                 close(drv->mlme_sock);
1040         os_free(drv->assoc_req_ies);
1041         os_free(drv->assoc_resp_ies);
1042         os_free(drv);
1043 }
1044
1045
1046 /**
1047  * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1048  * @eloop_ctx: Unused
1049  * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1050  *
1051  * This function can be used as registered timeout when starting a scan to
1052  * generate a scan completed event if the driver does not report this.
1053  */
1054 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1055 {
1056         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1057         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1058 }
1059
1060
1061 /**
1062  * wpa_driver_wext_scan - Request the driver to initiate scan
1063  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1064  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1065  *      all SSIDs (either active scan with broadcast SSID or passive
1066  *      scan
1067  * @ssid_len: Length of the SSID
1068  * Returns: 0 on success, -1 on failure
1069  */
1070 int wpa_driver_wext_scan(void *priv, const u8 *ssid, size_t ssid_len)
1071 {
1072         struct wpa_driver_wext_data *drv = priv;
1073         struct iwreq iwr;
1074         int ret = 0, timeout;
1075         struct iw_scan_req req;
1076
1077         if (ssid_len > IW_ESSID_MAX_SIZE) {
1078                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1079                            __FUNCTION__, (unsigned long) ssid_len);
1080                 return -1;
1081         }
1082
1083         os_memset(&iwr, 0, sizeof(iwr));
1084         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1085
1086         if (ssid && ssid_len) {
1087                 os_memset(&req, 0, sizeof(req));
1088                 req.essid_len = ssid_len;
1089                 req.bssid.sa_family = ARPHRD_ETHER;
1090                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1091                 os_memcpy(req.essid, ssid, ssid_len);
1092                 iwr.u.data.pointer = (caddr_t) &req;
1093                 iwr.u.data.length = sizeof(req);
1094                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1095         }
1096
1097         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1098                 perror("ioctl[SIOCSIWSCAN]");
1099                 ret = -1;
1100         }
1101
1102         /* Not all drivers generate "scan completed" wireless event, so try to
1103          * read results after a timeout. */
1104         timeout = 5;
1105         if (drv->scan_complete_events) {
1106                 /*
1107                  * The driver seems to deliver SIOCGIWSCAN events to notify
1108                  * when scan is complete, so use longer timeout to avoid race
1109                  * conditions with scanning and following association request.
1110                  */
1111                 timeout = 30;
1112         }
1113         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1114                    "seconds", ret, timeout);
1115         eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1116         eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1117                                drv->ctx);
1118
1119         return ret;
1120 }
1121
1122
1123 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1124                                     size_t *len)
1125 {
1126         struct iwreq iwr;
1127         u8 *res_buf;
1128         size_t res_buf_len;
1129
1130         res_buf_len = IW_SCAN_MAX_DATA;
1131         for (;;) {
1132                 res_buf = os_malloc(res_buf_len);
1133                 if (res_buf == NULL)
1134                         return NULL;
1135                 os_memset(&iwr, 0, sizeof(iwr));
1136                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1137                 iwr.u.data.pointer = res_buf;
1138                 iwr.u.data.length = res_buf_len;
1139
1140                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1141                         break;
1142
1143                 if (errno == E2BIG && res_buf_len < 65535) {
1144                         os_free(res_buf);
1145                         res_buf = NULL;
1146                         res_buf_len *= 2;
1147                         if (res_buf_len > 65535)
1148                                 res_buf_len = 65535; /* 16-bit length field */
1149                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1150                                    "trying larger buffer (%lu bytes)",
1151                                    (unsigned long) res_buf_len);
1152                 } else {
1153                         perror("ioctl[SIOCGIWSCAN]");
1154                         os_free(res_buf);
1155                         return NULL;
1156                 }
1157         }
1158
1159         if (iwr.u.data.length > res_buf_len) {
1160                 os_free(res_buf);
1161                 return NULL;
1162         }
1163         *len = iwr.u.data.length;
1164
1165         return res_buf;
1166 }
1167
1168
1169 /*
1170  * Data structure for collecting WEXT scan results. This is needed to allow
1171  * the various methods of reporting IEs to be combined into a single IE buffer.
1172  */
1173 struct wext_scan_data {
1174         struct wpa_scan_res res;
1175         u8 *ie;
1176         size_t ie_len;
1177         u8 ssid[32];
1178         size_t ssid_len;
1179         int maxrate;
1180 };
1181
1182
1183 static void wext_get_scan_mode(struct iw_event *iwe,
1184                                struct wext_scan_data *res)
1185 {
1186         if (iwe->u.mode == IW_MODE_ADHOC)
1187                 res->res.caps |= IEEE80211_CAP_IBSS;
1188         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1189                 res->res.caps |= IEEE80211_CAP_ESS;
1190 }
1191
1192
1193 static void wext_get_scan_ssid(struct iw_event *iwe,
1194                                struct wext_scan_data *res, char *custom,
1195                                char *end)
1196 {
1197         int ssid_len = iwe->u.essid.length;
1198         if (custom + ssid_len > end)
1199                 return;
1200         if (iwe->u.essid.flags &&
1201             ssid_len > 0 &&
1202             ssid_len <= IW_ESSID_MAX_SIZE) {
1203                 os_memcpy(res->ssid, custom, ssid_len);
1204                 res->ssid_len = ssid_len;
1205         }
1206 }
1207
1208
1209 static void wext_get_scan_freq(struct iw_event *iwe,
1210                                struct wext_scan_data *res)
1211 {
1212         int divi = 1000000, i;
1213
1214         if (iwe->u.freq.e == 0) {
1215                 /*
1216                  * Some drivers do not report frequency, but a channel.
1217                  * Try to map this to frequency by assuming they are using
1218                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1219                  * frequency if the driver sends both frequency and channel,
1220                  * since the driver may be sending an A-band channel that we
1221                  * don't handle here.
1222                  */
1223
1224                 if (res->res.freq)
1225                         return;
1226
1227                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1228                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1229                         return;
1230                 } else if (iwe->u.freq.m == 14) {
1231                         res->res.freq = 2484;
1232                         return;
1233                 }
1234         }
1235
1236         if (iwe->u.freq.e > 6) {
1237                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1238                            MACSTR " m=%d e=%d)",
1239                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1240                            iwe->u.freq.e);
1241                 return;
1242         }
1243
1244         for (i = 0; i < iwe->u.freq.e; i++)
1245                 divi /= 10;
1246         res->res.freq = iwe->u.freq.m / divi;
1247 }
1248
1249
1250 static void wext_get_scan_qual(struct iw_event *iwe,
1251                                struct wext_scan_data *res)
1252 {
1253         res->res.qual = iwe->u.qual.qual;
1254         res->res.noise = iwe->u.qual.noise;
1255         res->res.level = iwe->u.qual.level;
1256 }
1257
1258
1259 static void wext_get_scan_encode(struct iw_event *iwe,
1260                                  struct wext_scan_data *res)
1261 {
1262         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1263                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1264 }
1265
1266
1267 static void wext_get_scan_rate(struct iw_event *iwe,
1268                                struct wext_scan_data *res, char *pos,
1269                                char *end)
1270 {
1271         int maxrate;
1272         char *custom = pos + IW_EV_LCP_LEN;
1273         struct iw_param p;
1274         size_t clen;
1275
1276         clen = iwe->len;
1277         if (custom + clen > end)
1278                 return;
1279         maxrate = 0;
1280         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1281                 /* Note: may be misaligned, make a local, aligned copy */
1282                 os_memcpy(&p, custom, sizeof(struct iw_param));
1283                 if (p.value > maxrate)
1284                         maxrate = p.value;
1285                 clen -= sizeof(struct iw_param);
1286                 custom += sizeof(struct iw_param);
1287         }
1288
1289         /* Convert the maxrate from WE-style (b/s units) to
1290          * 802.11 rates (500000 b/s units).
1291          */
1292         res->maxrate = maxrate / 500000;
1293 }
1294
1295
1296 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1297                                     struct wext_scan_data *res, char *custom,
1298                                     char *end)
1299 {
1300         char *genie, *gpos, *gend;
1301         u8 *tmp;
1302
1303         if (iwe->u.data.length == 0)
1304                 return;
1305
1306         gpos = genie = custom;
1307         gend = genie + iwe->u.data.length;
1308         if (gend > end) {
1309                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1310                 return;
1311         }
1312
1313         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1314         if (tmp == NULL)
1315                 return;
1316         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1317         res->ie = tmp;
1318         res->ie_len += gend - gpos;
1319 }
1320
1321
1322 static void wext_get_scan_custom(struct iw_event *iwe,
1323                                  struct wext_scan_data *res, char *custom,
1324                                  char *end)
1325 {
1326         size_t clen;
1327         u8 *tmp;
1328
1329         clen = iwe->u.data.length;
1330         if (custom + clen > end)
1331                 return;
1332
1333         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1334                 char *spos;
1335                 int bytes;
1336                 spos = custom + 7;
1337                 bytes = custom + clen - spos;
1338                 if (bytes & 1 || bytes == 0)
1339                         return;
1340                 bytes /= 2;
1341                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1342                 if (tmp == NULL)
1343                         return;
1344                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1345                 res->ie = tmp;
1346                 res->ie_len += bytes;
1347         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1348                 char *spos;
1349                 int bytes;
1350                 spos = custom + 7;
1351                 bytes = custom + clen - spos;
1352                 if (bytes & 1 || bytes == 0)
1353                         return;
1354                 bytes /= 2;
1355                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1356                 if (tmp == NULL)
1357                         return;
1358                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1359                 res->ie = tmp;
1360                 res->ie_len += bytes;
1361         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1362                 char *spos;
1363                 int bytes;
1364                 u8 bin[8];
1365                 spos = custom + 4;
1366                 bytes = custom + clen - spos;
1367                 if (bytes != 16) {
1368                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1369                         return;
1370                 }
1371                 bytes /= 2;
1372                 hexstr2bin(spos, bin, bytes);
1373                 res->res.tsf += WPA_GET_BE64(bin);
1374         }
1375 }
1376
1377
1378 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1379 {
1380         return drv->we_version_compiled > 18 &&
1381                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1382                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1383 }
1384
1385
1386 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1387                                            struct wext_scan_data *data)
1388 {
1389         struct wpa_scan_res **tmp;
1390         struct wpa_scan_res *r;
1391         size_t extra_len;
1392         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1393
1394         /* Figure out whether we need to fake any IEs */
1395         pos = data->ie;
1396         end = pos + data->ie_len;
1397         while (pos && pos + 1 < end) {
1398                 if (pos + 2 + pos[1] > end)
1399                         break;
1400                 if (pos[0] == WLAN_EID_SSID)
1401                         ssid_ie = pos;
1402                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1403                         rate_ie = pos;
1404                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1405                         rate_ie = pos;
1406                 pos += 2 + pos[1];
1407         }
1408
1409         extra_len = 0;
1410         if (ssid_ie == NULL)
1411                 extra_len += 2 + data->ssid_len;
1412         if (rate_ie == NULL && data->maxrate)
1413                 extra_len += 3;
1414
1415         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1416         if (r == NULL)
1417                 return;
1418         os_memcpy(r, &data->res, sizeof(*r));
1419         r->ie_len = extra_len + data->ie_len;
1420         pos = (u8 *) (r + 1);
1421         if (ssid_ie == NULL) {
1422                 /*
1423                  * Generate a fake SSID IE since the driver did not report
1424                  * a full IE list.
1425                  */
1426                 *pos++ = WLAN_EID_SSID;
1427                 *pos++ = data->ssid_len;
1428                 os_memcpy(pos, data->ssid, data->ssid_len);
1429                 pos += data->ssid_len;
1430         }
1431         if (rate_ie == NULL && data->maxrate) {
1432                 /*
1433                  * Generate a fake Supported Rates IE since the driver did not
1434                  * report a full IE list.
1435                  */
1436                 *pos++ = WLAN_EID_SUPP_RATES;
1437                 *pos++ = 1;
1438                 *pos++ = data->maxrate;
1439         }
1440         if (data->ie)
1441                 os_memcpy(pos, data->ie, data->ie_len);
1442
1443         tmp = os_realloc(res->res,
1444                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1445         if (tmp == NULL) {
1446                 os_free(r);
1447                 return;
1448         }
1449         tmp[res->num++] = r;
1450         res->res = tmp;
1451 }
1452
1453
1454 /**
1455  * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1456  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1457  * Returns: Scan results on success, -1 on failure
1458  */
1459 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1460 {
1461         struct wpa_driver_wext_data *drv = priv;
1462         size_t ap_num = 0, len;
1463         int first;
1464         u8 *res_buf;
1465         struct iw_event iwe_buf, *iwe = &iwe_buf;
1466         char *pos, *end, *custom;
1467         struct wpa_scan_results *res;
1468         struct wext_scan_data data;
1469
1470         res_buf = wpa_driver_wext_giwscan(drv, &len);
1471         if (res_buf == NULL)
1472                 return NULL;
1473
1474         ap_num = 0;
1475         first = 1;
1476
1477         res = os_zalloc(sizeof(*res));
1478         if (res == NULL) {
1479                 os_free(res_buf);
1480                 return NULL;
1481         }
1482
1483         pos = (char *) res_buf;
1484         end = (char *) res_buf + len;
1485         os_memset(&data, 0, sizeof(data));
1486
1487         while (pos + IW_EV_LCP_LEN <= end) {
1488                 /* Event data may be unaligned, so make a local, aligned copy
1489                  * before processing. */
1490                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1491                 if (iwe->len <= IW_EV_LCP_LEN)
1492                         break;
1493
1494                 custom = pos + IW_EV_POINT_LEN;
1495                 if (wext_19_iw_point(drv, iwe->cmd)) {
1496                         /* WE-19 removed the pointer from struct iw_point */
1497                         char *dpos = (char *) &iwe_buf.u.data.length;
1498                         int dlen = dpos - (char *) &iwe_buf;
1499                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1500                                   sizeof(struct iw_event) - dlen);
1501                 } else {
1502                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1503                         custom += IW_EV_POINT_OFF;
1504                 }
1505
1506                 switch (iwe->cmd) {
1507                 case SIOCGIWAP:
1508                         if (!first)
1509                                 wpa_driver_wext_add_scan_entry(res, &data);
1510                         first = 0;
1511                         os_free(data.ie);
1512                         os_memset(&data, 0, sizeof(data));
1513                         os_memcpy(data.res.bssid,
1514                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1515                         break;
1516                 case SIOCGIWMODE:
1517                         wext_get_scan_mode(iwe, &data);
1518                         break;
1519                 case SIOCGIWESSID:
1520                         wext_get_scan_ssid(iwe, &data, custom, end);
1521                         break;
1522                 case SIOCGIWFREQ:
1523                         wext_get_scan_freq(iwe, &data);
1524                         break;
1525                 case IWEVQUAL:
1526                         wext_get_scan_qual(iwe, &data);
1527                         break;
1528                 case SIOCGIWENCODE:
1529                         wext_get_scan_encode(iwe, &data);
1530                         break;
1531                 case SIOCGIWRATE:
1532                         wext_get_scan_rate(iwe, &data, pos, end);
1533                         break;
1534                 case IWEVGENIE:
1535                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1536                         break;
1537                 case IWEVCUSTOM:
1538                         wext_get_scan_custom(iwe, &data, custom, end);
1539                         break;
1540                 }
1541
1542                 pos += iwe->len;
1543         }
1544         os_free(res_buf);
1545         res_buf = NULL;
1546         if (!first)
1547                 wpa_driver_wext_add_scan_entry(res, &data);
1548         os_free(data.ie);
1549
1550         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1551                    (unsigned long) len, (unsigned long) res->num);
1552
1553         return res;
1554 }
1555
1556
1557 static int wpa_driver_wext_get_range(void *priv)
1558 {
1559         struct wpa_driver_wext_data *drv = priv;
1560         struct iw_range *range;
1561         struct iwreq iwr;
1562         int minlen;
1563         size_t buflen;
1564
1565         /*
1566          * Use larger buffer than struct iw_range in order to allow the
1567          * structure to grow in the future.
1568          */
1569         buflen = sizeof(struct iw_range) + 500;
1570         range = os_zalloc(buflen);
1571         if (range == NULL)
1572                 return -1;
1573
1574         os_memset(&iwr, 0, sizeof(iwr));
1575         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1576         iwr.u.data.pointer = (caddr_t) range;
1577         iwr.u.data.length = buflen;
1578
1579         minlen = ((char *) &range->enc_capa) - (char *) range +
1580                 sizeof(range->enc_capa);
1581
1582         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1583                 perror("ioctl[SIOCGIWRANGE]");
1584                 os_free(range);
1585                 return -1;
1586         } else if (iwr.u.data.length >= minlen &&
1587                    range->we_version_compiled >= 18) {
1588                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1589                            "WE(source)=%d enc_capa=0x%x",
1590                            range->we_version_compiled,
1591                            range->we_version_source,
1592                            range->enc_capa);
1593                 drv->has_capability = 1;
1594                 drv->we_version_compiled = range->we_version_compiled;
1595                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1596                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1597                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1598                 }
1599                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1600                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1601                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1602                 }
1603                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1604                         WPA_DRIVER_CAPA_ENC_WEP104;
1605                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1606                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1607                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1608                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1609                 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1610                         drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1611
1612                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
1613                            "flags 0x%x",
1614                            drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1615         } else {
1616                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1617                            "assuming WPA is not supported");
1618         }
1619
1620         os_free(range);
1621         return 0;
1622 }
1623
1624
1625 static int wpa_driver_wext_set_wpa(void *priv, int enabled)
1626 {
1627         struct wpa_driver_wext_data *drv = priv;
1628         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1629
1630         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1631                                               enabled);
1632 }
1633
1634
1635 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1636                                    const u8 *psk)
1637 {
1638         struct iw_encode_ext *ext;
1639         struct iwreq iwr;
1640         int ret;
1641
1642         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1643
1644         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1645                 return 0;
1646
1647         if (!psk)
1648                 return 0;
1649
1650         os_memset(&iwr, 0, sizeof(iwr));
1651         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1652
1653         ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1654         if (ext == NULL)
1655                 return -1;
1656
1657         iwr.u.encoding.pointer = (caddr_t) ext;
1658         iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1659         ext->key_len = PMK_LEN;
1660         os_memcpy(&ext->key, psk, ext->key_len);
1661         ext->alg = IW_ENCODE_ALG_PMK;
1662
1663         ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1664         if (ret < 0)
1665                 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1666         os_free(ext);
1667
1668         return ret;
1669 }
1670
1671
1672 static int wpa_driver_wext_set_key_ext(void *priv, wpa_alg alg,
1673                                        const u8 *addr, int key_idx,
1674                                        int set_tx, const u8 *seq,
1675                                        size_t seq_len,
1676                                        const u8 *key, size_t key_len)
1677 {
1678         struct wpa_driver_wext_data *drv = priv;
1679         struct iwreq iwr;
1680         int ret = 0;
1681         struct iw_encode_ext *ext;
1682
1683         if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1684                 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1685                            __FUNCTION__, (unsigned long) seq_len);
1686                 return -1;
1687         }
1688
1689         ext = os_zalloc(sizeof(*ext) + key_len);
1690         if (ext == NULL)
1691                 return -1;
1692         os_memset(&iwr, 0, sizeof(iwr));
1693         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1694         iwr.u.encoding.flags = key_idx + 1;
1695         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1696         if (alg == WPA_ALG_NONE)
1697                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1698         iwr.u.encoding.pointer = (caddr_t) ext;
1699         iwr.u.encoding.length = sizeof(*ext) + key_len;
1700
1701         if (addr == NULL ||
1702             os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
1703                 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1704         if (set_tx)
1705                 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1706
1707         ext->addr.sa_family = ARPHRD_ETHER;
1708         if (addr)
1709                 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1710         else
1711                 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1712         if (key && key_len) {
1713                 os_memcpy(ext + 1, key, key_len);
1714                 ext->key_len = key_len;
1715         }
1716         switch (alg) {
1717         case WPA_ALG_NONE:
1718                 ext->alg = IW_ENCODE_ALG_NONE;
1719                 break;
1720         case WPA_ALG_WEP:
1721                 ext->alg = IW_ENCODE_ALG_WEP;
1722                 break;
1723         case WPA_ALG_TKIP:
1724                 ext->alg = IW_ENCODE_ALG_TKIP;
1725                 break;
1726         case WPA_ALG_CCMP:
1727                 ext->alg = IW_ENCODE_ALG_CCMP;
1728                 break;
1729         case WPA_ALG_PMK:
1730                 ext->alg = IW_ENCODE_ALG_PMK;
1731                 break;
1732 #ifdef CONFIG_IEEE80211W
1733         case WPA_ALG_IGTK:
1734                 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1735                 break;
1736 #endif /* CONFIG_IEEE80211W */
1737         default:
1738                 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1739                            __FUNCTION__, alg);
1740                 os_free(ext);
1741                 return -1;
1742         }
1743
1744         if (seq && seq_len) {
1745                 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1746                 os_memcpy(ext->rx_seq, seq, seq_len);
1747         }
1748
1749         if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1750                 ret = errno == EOPNOTSUPP ? -2 : -1;
1751                 if (errno == ENODEV) {
1752                         /*
1753                          * ndiswrapper seems to be returning incorrect error
1754                          * code.. */
1755                         ret = -2;
1756                 }
1757
1758                 perror("ioctl[SIOCSIWENCODEEXT]");
1759         }
1760
1761         os_free(ext);
1762         return ret;
1763 }
1764
1765
1766 /**
1767  * wpa_driver_wext_set_key - Configure encryption key
1768  * @priv: Pointer to private wext data from wpa_driver_wext_init()
1769  * @priv: Private driver interface data
1770  * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1771  *      %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1772  * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1773  *      broadcast/default keys
1774  * @key_idx: key index (0..3), usually 0 for unicast keys
1775  * @set_tx: Configure this key as the default Tx key (only used when
1776  *      driver does not support separate unicast/individual key
1777  * @seq: Sequence number/packet number, seq_len octets, the next
1778  *      packet number to be used for in replay protection; configured
1779  *      for Rx keys (in most cases, this is only used with broadcast
1780  *      keys and set to zero for unicast keys)
1781  * @seq_len: Length of the seq, depends on the algorithm:
1782  *      TKIP: 6 octets, CCMP: 6 octets
1783  * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1784  *      8-byte Rx Mic Key
1785  * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1786  *      TKIP: 32, CCMP: 16)
1787  * Returns: 0 on success, -1 on failure
1788  *
1789  * This function uses SIOCSIWENCODEEXT by default, but tries to use
1790  * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1791  */
1792 int wpa_driver_wext_set_key(void *priv, wpa_alg alg,
1793                             const u8 *addr, int key_idx,
1794                             int set_tx, const u8 *seq, size_t seq_len,
1795                             const u8 *key, size_t key_len)
1796 {
1797         struct wpa_driver_wext_data *drv = priv;
1798         struct iwreq iwr;
1799         int ret = 0;
1800
1801         wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1802                    "key_len=%lu",
1803                    __FUNCTION__, alg, key_idx, set_tx,
1804                    (unsigned long) seq_len, (unsigned long) key_len);
1805
1806         ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1807                                           seq, seq_len, key, key_len);
1808         if (ret == 0)
1809                 return 0;
1810
1811         if (ret == -2 &&
1812             (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1813                 wpa_printf(MSG_DEBUG, "Driver did not support "
1814                            "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1815                 ret = 0;
1816         } else {
1817                 wpa_printf(MSG_DEBUG, "Driver did not support "
1818                            "SIOCSIWENCODEEXT");
1819                 return ret;
1820         }
1821
1822         os_memset(&iwr, 0, sizeof(iwr));
1823         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1824         iwr.u.encoding.flags = key_idx + 1;
1825         iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1826         if (alg == WPA_ALG_NONE)
1827                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1828         iwr.u.encoding.pointer = (caddr_t) key;
1829         iwr.u.encoding.length = key_len;
1830
1831         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1832                 perror("ioctl[SIOCSIWENCODE]");
1833                 ret = -1;
1834         }
1835
1836         if (set_tx && alg != WPA_ALG_NONE) {
1837                 os_memset(&iwr, 0, sizeof(iwr));
1838                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1839                 iwr.u.encoding.flags = key_idx + 1;
1840                 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1841                 iwr.u.encoding.pointer = (caddr_t) NULL;
1842                 iwr.u.encoding.length = 0;
1843                 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1844                         perror("ioctl[SIOCSIWENCODE] (set_tx)");
1845                         ret = -1;
1846                 }
1847         }
1848
1849         return ret;
1850 }
1851
1852
1853 static int wpa_driver_wext_set_countermeasures(void *priv,
1854                                                int enabled)
1855 {
1856         struct wpa_driver_wext_data *drv = priv;
1857         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1858         return wpa_driver_wext_set_auth_param(drv,
1859                                               IW_AUTH_TKIP_COUNTERMEASURES,
1860                                               enabled);
1861 }
1862
1863
1864 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1865                                                 int enabled)
1866 {
1867         struct wpa_driver_wext_data *drv = priv;
1868         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1869         drv->use_crypt = enabled;
1870         return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1871                                               enabled);
1872 }
1873
1874
1875 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1876                                 const u8 *addr, int cmd, int reason_code)
1877 {
1878         struct iwreq iwr;
1879         struct iw_mlme mlme;
1880         int ret = 0;
1881
1882         os_memset(&iwr, 0, sizeof(iwr));
1883         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1884         os_memset(&mlme, 0, sizeof(mlme));
1885         mlme.cmd = cmd;
1886         mlme.reason_code = reason_code;
1887         mlme.addr.sa_family = ARPHRD_ETHER;
1888         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1889         iwr.u.data.pointer = (caddr_t) &mlme;
1890         iwr.u.data.length = sizeof(mlme);
1891
1892         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1893                 perror("ioctl[SIOCSIWMLME]");
1894                 ret = -1;
1895         }
1896
1897         return ret;
1898 }
1899
1900
1901 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1902                                           int reason_code)
1903 {
1904         struct wpa_driver_wext_data *drv = priv;
1905         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1906         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1907 }
1908
1909
1910 static int wpa_driver_wext_disassociate(void *priv, const u8 *addr,
1911                                         int reason_code)
1912 {
1913         struct wpa_driver_wext_data *drv = priv;
1914         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1915         return wpa_driver_wext_mlme(drv, addr, IW_MLME_DISASSOC,
1916                                     reason_code);
1917 }
1918
1919
1920 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
1921                                       size_t ie_len)
1922 {
1923         struct wpa_driver_wext_data *drv = priv;
1924         struct iwreq iwr;
1925         int ret = 0;
1926
1927         os_memset(&iwr, 0, sizeof(iwr));
1928         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1929         iwr.u.data.pointer = (caddr_t) ie;
1930         iwr.u.data.length = ie_len;
1931
1932         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1933                 perror("ioctl[SIOCSIWGENIE]");
1934                 ret = -1;
1935         }
1936
1937         return ret;
1938 }
1939
1940
1941 int wpa_driver_wext_cipher2wext(int cipher)
1942 {
1943         switch (cipher) {
1944         case CIPHER_NONE:
1945                 return IW_AUTH_CIPHER_NONE;
1946         case CIPHER_WEP40:
1947                 return IW_AUTH_CIPHER_WEP40;
1948         case CIPHER_TKIP:
1949                 return IW_AUTH_CIPHER_TKIP;
1950         case CIPHER_CCMP:
1951                 return IW_AUTH_CIPHER_CCMP;
1952         case CIPHER_WEP104:
1953                 return IW_AUTH_CIPHER_WEP104;
1954         default:
1955                 return 0;
1956         }
1957 }
1958
1959
1960 int wpa_driver_wext_keymgmt2wext(int keymgmt)
1961 {
1962         switch (keymgmt) {
1963         case KEY_MGMT_802_1X:
1964         case KEY_MGMT_802_1X_NO_WPA:
1965                 return IW_AUTH_KEY_MGMT_802_1X;
1966         case KEY_MGMT_PSK:
1967                 return IW_AUTH_KEY_MGMT_PSK;
1968         default:
1969                 return 0;
1970         }
1971 }
1972
1973
1974 static int
1975 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
1976                                   struct wpa_driver_associate_params *params)
1977 {
1978         struct iwreq iwr;
1979         int ret = 0;
1980
1981         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1982                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1983
1984         os_memset(&iwr, 0, sizeof(iwr));
1985         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1986         /* Just changing mode, not actual keys */
1987         iwr.u.encoding.flags = 0;
1988         iwr.u.encoding.pointer = (caddr_t) NULL;
1989         iwr.u.encoding.length = 0;
1990
1991         /*
1992          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
1993          * different things. Here they are used to indicate Open System vs.
1994          * Shared Key authentication algorithm. However, some drivers may use
1995          * them to select between open/restricted WEP encrypted (open = allow
1996          * both unencrypted and encrypted frames; restricted = only allow
1997          * encrypted frames).
1998          */
1999
2000         if (!drv->use_crypt) {
2001                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2002         } else {
2003                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2004                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2005                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2006                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2007         }
2008
2009         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2010                 perror("ioctl[SIOCSIWENCODE]");
2011                 ret = -1;
2012         }
2013
2014         return ret;
2015 }
2016
2017
2018 int wpa_driver_wext_associate(void *priv,
2019                               struct wpa_driver_associate_params *params)
2020 {
2021         struct wpa_driver_wext_data *drv = priv;
2022         int ret = 0;
2023         int allow_unencrypted_eapol;
2024         int value;
2025
2026         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2027
2028         /*
2029          * If the driver did not support SIOCSIWAUTH, fallback to
2030          * SIOCSIWENCODE here.
2031          */
2032         if (drv->auth_alg_fallback &&
2033             wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2034                 ret = -1;
2035
2036         if (!params->bssid &&
2037             wpa_driver_wext_set_bssid(drv, NULL) < 0)
2038                 ret = -1;
2039
2040         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2041          * from configuration, not from here, where only the selected suite is
2042          * available */
2043         if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2044             < 0)
2045                 ret = -1;
2046         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2047                 value = IW_AUTH_WPA_VERSION_DISABLED;
2048         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2049                 value = IW_AUTH_WPA_VERSION_WPA2;
2050         else
2051                 value = IW_AUTH_WPA_VERSION_WPA;
2052         if (wpa_driver_wext_set_auth_param(drv,
2053                                            IW_AUTH_WPA_VERSION, value) < 0)
2054                 ret = -1;
2055         value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2056         if (wpa_driver_wext_set_auth_param(drv,
2057                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2058                 ret = -1;
2059         value = wpa_driver_wext_cipher2wext(params->group_suite);
2060         if (wpa_driver_wext_set_auth_param(drv,
2061                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2062                 ret = -1;
2063         value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2064         if (wpa_driver_wext_set_auth_param(drv,
2065                                            IW_AUTH_KEY_MGMT, value) < 0)
2066                 ret = -1;
2067         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2068                 params->pairwise_suite != CIPHER_NONE ||
2069                 params->group_suite != CIPHER_NONE ||
2070                 params->wpa_ie_len;
2071         if (wpa_driver_wext_set_auth_param(drv,
2072                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2073                 ret = -1;
2074
2075         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2076          * not using WPA. IEEE 802.1X specifies that these frames are not
2077          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2078         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2079             params->key_mgmt_suite == KEY_MGMT_PSK)
2080                 allow_unencrypted_eapol = 0;
2081         else
2082                 allow_unencrypted_eapol = 1;
2083
2084         if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2085                 ret = -1;
2086         if (wpa_driver_wext_set_auth_param(drv,
2087                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2088                                            allow_unencrypted_eapol) < 0)
2089                 ret = -1;
2090 #ifdef CONFIG_IEEE80211W
2091         switch (params->mgmt_frame_protection) {
2092         case NO_MGMT_FRAME_PROTECTION:
2093                 value = IW_AUTH_MFP_DISABLED;
2094                 break;
2095         case MGMT_FRAME_PROTECTION_OPTIONAL:
2096                 value = IW_AUTH_MFP_OPTIONAL;
2097                 break;
2098         case MGMT_FRAME_PROTECTION_REQUIRED:
2099                 value = IW_AUTH_MFP_REQUIRED;
2100                 break;
2101         };
2102         if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2103                 ret = -1;
2104 #endif /* CONFIG_IEEE80211W */
2105         if (params->freq && wpa_driver_wext_set_freq(drv, params->freq) < 0)
2106                 ret = -1;
2107         if (wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2108                 ret = -1;
2109         if (params->bssid &&
2110             wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2111                 ret = -1;
2112
2113         return ret;
2114 }
2115
2116
2117 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2118 {
2119         struct wpa_driver_wext_data *drv = priv;
2120         int algs = 0, res;
2121
2122         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2123                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2124         if (auth_alg & AUTH_ALG_SHARED_KEY)
2125                 algs |= IW_AUTH_ALG_SHARED_KEY;
2126         if (auth_alg & AUTH_ALG_LEAP)
2127                 algs |= IW_AUTH_ALG_LEAP;
2128         if (algs == 0) {
2129                 /* at least one algorithm should be set */
2130                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2131         }
2132
2133         res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2134                                              algs);
2135         drv->auth_alg_fallback = res == -2;
2136         return res;
2137 }
2138
2139
2140 /**
2141  * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2142  * @priv: Pointer to private wext data from wpa_driver_wext_init()
2143  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2144  * Returns: 0 on success, -1 on failure
2145  */
2146 int wpa_driver_wext_set_mode(void *priv, int mode)
2147 {
2148         struct wpa_driver_wext_data *drv = priv;
2149         struct iwreq iwr;
2150         int ret = -1, flags;
2151         unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2152
2153         os_memset(&iwr, 0, sizeof(iwr));
2154         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2155         iwr.u.mode = new_mode;
2156         if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2157                 ret = 0;
2158                 goto done;
2159         }
2160
2161         if (errno != EBUSY) {
2162                 perror("ioctl[SIOCSIWMODE]");
2163                 goto done;
2164         }
2165
2166         /* mac80211 doesn't allow mode changes while the device is up, so if
2167          * the device isn't in the mode we're about to change to, take device
2168          * down, try to set the mode again, and bring it back up.
2169          */
2170         if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2171                 perror("ioctl[SIOCGIWMODE]");
2172                 goto done;
2173         }
2174
2175         if (iwr.u.mode == new_mode) {
2176                 ret = 0;
2177                 goto done;
2178         }
2179
2180         if (wpa_driver_wext_get_ifflags(drv, &flags) == 0) {
2181                 (void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
2182
2183                 /* Try to set the mode again while the interface is down */
2184                 iwr.u.mode = new_mode;
2185                 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2186                         perror("ioctl[SIOCSIWMODE]");
2187                 else
2188                         ret = 0;
2189
2190                 /* Ignore return value of get_ifflags to ensure that the device
2191                  * is always up like it was before this function was called.
2192                  */
2193                 (void) wpa_driver_wext_get_ifflags(drv, &flags);
2194                 (void) wpa_driver_wext_set_ifflags(drv, flags | IFF_UP);
2195         }
2196
2197 done:
2198         return ret;
2199 }
2200
2201
2202 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2203                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2204 {
2205         struct iwreq iwr;
2206         struct iw_pmksa pmksa;
2207         int ret = 0;
2208
2209         os_memset(&iwr, 0, sizeof(iwr));
2210         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2211         os_memset(&pmksa, 0, sizeof(pmksa));
2212         pmksa.cmd = cmd;
2213         pmksa.bssid.sa_family = ARPHRD_ETHER;
2214         if (bssid)
2215                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2216         if (pmkid)
2217                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2218         iwr.u.data.pointer = (caddr_t) &pmksa;
2219         iwr.u.data.length = sizeof(pmksa);
2220
2221         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2222                 if (errno != EOPNOTSUPP)
2223                         perror("ioctl[SIOCSIWPMKSA]");
2224                 ret = -1;
2225         }
2226
2227         return ret;
2228 }
2229
2230
2231 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2232                                      const u8 *pmkid)
2233 {
2234         struct wpa_driver_wext_data *drv = priv;
2235         return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2236 }
2237
2238
2239 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2240                                         const u8 *pmkid)
2241 {
2242         struct wpa_driver_wext_data *drv = priv;
2243         return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2244 }
2245
2246
2247 static int wpa_driver_wext_flush_pmkid(void *priv)
2248 {
2249         struct wpa_driver_wext_data *drv = priv;
2250         return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2251 }
2252
2253
2254 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2255 {
2256         struct wpa_driver_wext_data *drv = priv;
2257         if (!drv->has_capability)
2258                 return -1;
2259         os_memcpy(capa, &drv->capa, sizeof(*capa));
2260         return 0;
2261 }
2262
2263
2264 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2265                                         const char *ifname)
2266 {
2267         if (ifname == NULL) {
2268                 drv->ifindex2 = -1;
2269                 return 0;
2270         }
2271
2272         drv->ifindex2 = if_nametoindex(ifname);
2273         if (drv->ifindex2 <= 0)
2274                 return -1;
2275
2276         wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2277                    "wireless events", drv->ifindex2, ifname);
2278
2279         return 0;
2280 }
2281
2282
2283 int wpa_driver_wext_set_operstate(void *priv, int state)
2284 {
2285         struct wpa_driver_wext_data *drv = priv;
2286
2287         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2288                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2289         drv->operstate = state;
2290         return wpa_driver_wext_send_oper_ifla(
2291                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2292 }
2293
2294
2295 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2296 {
2297         return drv->we_version_compiled;
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_wpa = wpa_driver_wext_set_wpa,
2307         .set_key = wpa_driver_wext_set_key,
2308         .set_countermeasures = wpa_driver_wext_set_countermeasures,
2309         .set_drop_unencrypted = wpa_driver_wext_set_drop_unencrypted,
2310         .scan = wpa_driver_wext_scan,
2311         .get_scan_results2 = wpa_driver_wext_get_scan_results,
2312         .deauthenticate = wpa_driver_wext_deauthenticate,
2313         .disassociate = wpa_driver_wext_disassociate,
2314         .set_mode = wpa_driver_wext_set_mode,
2315         .associate = wpa_driver_wext_associate,
2316         .set_auth_alg = wpa_driver_wext_set_auth_alg,
2317         .init = wpa_driver_wext_init,
2318         .deinit = wpa_driver_wext_deinit,
2319         .add_pmkid = wpa_driver_wext_add_pmkid,
2320         .remove_pmkid = wpa_driver_wext_remove_pmkid,
2321         .flush_pmkid = wpa_driver_wext_flush_pmkid,
2322         .get_capa = wpa_driver_wext_get_capa,
2323         .set_operstate = wpa_driver_wext_set_operstate,
2324 };