src/drivers/driver_nl80211.c

   1 /*
   2  * WPA Supplicant - driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2003-2008, 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
  15 #include "includes.h"
  16 #include <sys/ioctl.h>
  17 #include <net/if_arp.h>
  18 #include <netlink/genl/genl.h>
  19 #include <netlink/genl/family.h>
  20 #include <netlink/genl/ctrl.h>
  21 #include <linux/nl80211.h>
  22
  23 #include "wireless_copy.h"
  24 #include "common.h"
  25 #include "driver.h"
  26 #include "eloop.h"
  27 #include "ieee802_11_defs.h"
  28
  29 #ifndef IFF_LOWER_UP
  30 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  31 #endif
  32 #ifndef IFF_DORMANT
  33 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  34 #endif
  35
  36 #ifndef IF_OPER_DORMANT
  37 #define IF_OPER_DORMANT 5
  38 #endif
  39 #ifndef IF_OPER_UP
  40 #define IF_OPER_UP 6
  41 #endif
  42
  43
  44 struct wpa_driver_nl80211_data {
  45         void *ctx;
  46         int event_sock;
  47         int ioctl_sock;
  48         char ifname[IFNAMSIZ + 1];
  49         int ifindex;
  50         u8 *assoc_req_ies;
  51         size_t assoc_req_ies_len;
  52         u8 *assoc_resp_ies;
  53         size_t assoc_resp_ies_len;
  54         struct wpa_driver_capa capa;
  55         int has_capability;
  56         int we_version_compiled;
  57
  58         /* for set_auth_alg fallback */
  59         int use_crypt;
  60         int auth_alg_fallback;
  61
  62         int operstate;
  63
  64         char mlmedev[IFNAMSIZ + 1];
  65
  66         int scan_complete_events;
  67
  68         struct nl_handle *nl_handle;
  69         struct nl_cache *nl_cache;
  70         struct nl_cb *nl_cb;
  71         struct genl_family *nl80211;
  72 };
  73
  74
  75 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
  76                                             void *timeout_ctx);
  77 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
  78 static int wpa_driver_nl80211_flush_pmkid(void *priv);
  79 static int wpa_driver_nl80211_get_range(void *priv);
  80
  81 static int wpa_driver_nl80211_send_oper_ifla(
  82         struct wpa_driver_nl80211_data *drv,
  83         int linkmode, int operstate)
  84 {
  85         struct {
  86                 struct nlmsghdr hdr;
  87                 struct ifinfomsg ifinfo;
  88                 char opts[16];
  89         } req;
  90         struct rtattr *rta;
  91         static int nl_seq;
  92         ssize_t ret;
  93
  94         os_memset(&req, 0, sizeof(req));
  95
  96         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
  97         req.hdr.nlmsg_type = RTM_SETLINK;
  98         req.hdr.nlmsg_flags = NLM_F_REQUEST;
  99         req.hdr.nlmsg_seq = ++nl_seq;
 100         req.hdr.nlmsg_pid = 0;
 101
 102         req.ifinfo.ifi_family = AF_UNSPEC;
 103         req.ifinfo.ifi_type = 0;
 104         req.ifinfo.ifi_index = drv->ifindex;
 105         req.ifinfo.ifi_flags = 0;
 106         req.ifinfo.ifi_change = 0;
 107
 108         if (linkmode != -1) {
 109                 rta = (struct rtattr *)
 110                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 111                 rta->rta_type = IFLA_LINKMODE;
 112                 rta->rta_len = RTA_LENGTH(sizeof(char));
 113                 *((char *) RTA_DATA(rta)) = linkmode;
 114                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 115                         RTA_LENGTH(sizeof(char));
 116         }
 117         if (operstate != -1) {
 118                 rta = (struct rtattr *)
 119                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 120                 rta->rta_type = IFLA_OPERSTATE;
 121                 rta->rta_len = RTA_LENGTH(sizeof(char));
 122                 *((char *) RTA_DATA(rta)) = operstate;
 123                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 124                         RTA_LENGTH(sizeof(char));
 125         }
 126
 127         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 128                    linkmode, operstate);
 129
 130         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 131         if (ret < 0) {
 132                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 133                            "%s (assume operstate is not supported)",
 134                            strerror(errno));
 135         }
 136
 137         return ret < 0 ? -1 : 0;
 138 }
 139
 140
 141 static int wpa_driver_nl80211_set_auth_param(
 142         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 143 {
 144         struct iwreq iwr;
 145         int ret = 0;
 146
 147         os_memset(&iwr, 0, sizeof(iwr));
 148         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 149         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 150         iwr.u.param.value = value;
 151
 152         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 153                 if (errno != EOPNOTSUPP) {
 154                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 155                                    "value 0x%x) failed: %s)",
 156                                    idx, value, strerror(errno));
 157                 }
 158                 ret = errno == EOPNOTSUPP ? -2 : -1;
 159         }
 160
 161         return ret;
 162 }
 163
 164
 165 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 166 {
 167         struct wpa_driver_nl80211_data *drv = priv;
 168         struct iwreq iwr;
 169         int ret = 0;
 170
 171         os_memset(&iwr, 0, sizeof(iwr));
 172         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 173
 174         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 175                 perror("ioctl[SIOCGIWAP]");
 176                 ret = -1;
 177         }
 178         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 179
 180         return ret;
 181 }
 182
 183
 184 static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
 185 {
 186         struct wpa_driver_nl80211_data *drv = priv;
 187         struct iwreq iwr;
 188         int ret = 0;
 189
 190         os_memset(&iwr, 0, sizeof(iwr));
 191         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 192         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 193         if (bssid)
 194                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 195         else
 196                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 197
 198         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 199                 perror("ioctl[SIOCSIWAP]");
 200                 ret = -1;
 201         }
 202
 203         return ret;
 204 }
 205
 206
 207 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 208 {
 209         struct wpa_driver_nl80211_data *drv = priv;
 210         struct iwreq iwr;
 211         int ret = 0;
 212
 213         os_memset(&iwr, 0, sizeof(iwr));
 214         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 215         iwr.u.essid.pointer = (caddr_t) ssid;
 216         iwr.u.essid.length = 32;
 217
 218         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 219                 perror("ioctl[SIOCGIWESSID]");
 220                 ret = -1;
 221         } else {
 222                 ret = iwr.u.essid.length;
 223                 if (ret > 32)
 224                         ret = 32;
 225                 /* Some drivers include nul termination in the SSID, so let's
 226                  * remove it here before further processing. WE-21 changes this
 227                  * to explicitly require the length _not_ to include nul
 228                  * termination. */
 229                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 230                     drv->we_version_compiled < 21)
 231                         ret--;
 232         }
 233
 234         return ret;
 235 }
 236
 237
 238 static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
 239                                        size_t ssid_len)
 240 {
 241         struct wpa_driver_nl80211_data *drv = priv;
 242         struct iwreq iwr;
 243         int ret = 0;
 244         char buf[33];
 245
 246         if (ssid_len > 32)
 247                 return -1;
 248
 249         os_memset(&iwr, 0, sizeof(iwr));
 250         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 251         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 252         iwr.u.essid.flags = (ssid_len != 0);
 253         os_memset(buf, 0, sizeof(buf));
 254         os_memcpy(buf, ssid, ssid_len);
 255         iwr.u.essid.pointer = (caddr_t) buf;
 256         if (drv->we_version_compiled < 21) {
 257                 /* For historic reasons, set SSID length to include one extra
 258                  * character, C string nul termination, even though SSID is
 259                  * really an octet string that should not be presented as a C
 260                  * string. Some Linux drivers decrement the length by one and
 261                  * can thus end up missing the last octet of the SSID if the
 262                  * length is not incremented here. WE-21 changes this to
 263                  * explicitly require the length _not_ to include nul
 264                  * termination. */
 265                 if (ssid_len)
 266                         ssid_len++;
 267         }
 268         iwr.u.essid.length = ssid_len;
 269
 270         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 271                 perror("ioctl[SIOCSIWESSID]");
 272                 ret = -1;
 273         }
 274
 275         return ret;
 276 }
 277
 278
 279 static int wpa_driver_nl80211_set_freq(void *priv, int freq)
 280 {
 281         struct wpa_driver_nl80211_data *drv = priv;
 282         struct iwreq iwr;
 283         int ret = 0;
 284
 285         os_memset(&iwr, 0, sizeof(iwr));
 286         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 287         iwr.u.freq.m = freq * 100000;
 288         iwr.u.freq.e = 1;
 289
 290         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 291                 perror("ioctl[SIOCSIWFREQ]");
 292                 ret = -1;
 293         }
 294
 295         return ret;
 296 }
 297
 298
 299 static void
 300 wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
 301 {
 302         union wpa_event_data data;
 303
 304         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 305                    custom);
 306
 307         os_memset(&data, 0, sizeof(data));
 308         /* Host AP driver */
 309         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 310                 data.michael_mic_failure.unicast =
 311                         os_strstr(custom, " unicast ") != NULL;
 312                 /* TODO: parse parameters(?) */
 313                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 314         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 315                 char *spos;
 316                 int bytes;
 317
 318                 spos = custom + 17;
 319
 320                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 321                 if (!bytes || (bytes & 1))
 322                         return;
 323                 bytes /= 2;
 324
 325                 data.assoc_info.req_ies = os_malloc(bytes);
 326                 if (data.assoc_info.req_ies == NULL)
 327                         return;
 328
 329                 data.assoc_info.req_ies_len = bytes;
 330                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 331
 332                 spos += bytes * 2;
 333
 334                 data.assoc_info.resp_ies = NULL;
 335                 data.assoc_info.resp_ies_len = 0;
 336
 337                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 338                         spos += 9;
 339
 340                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 341                         if (!bytes || (bytes & 1))
 342                                 goto done;
 343                         bytes /= 2;
 344
 345                         data.assoc_info.resp_ies = os_malloc(bytes);
 346                         if (data.assoc_info.resp_ies == NULL)
 347                                 goto done;
 348
 349                         data.assoc_info.resp_ies_len = bytes;
 350                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 351                 }
 352
 353                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 354
 355         done:
 356                 os_free(data.assoc_info.resp_ies);
 357                 os_free(data.assoc_info.req_ies);
 358 #ifdef CONFIG_PEERKEY
 359         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 360                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 361                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 362                                    "STKSTART.request '%s'", custom + 17);
 363                         return;
 364                 }
 365                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 366 #endif /* CONFIG_PEERKEY */
 367         }
 368 }
 369
 370
 371 static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
 372         void *ctx, const char *ev, size_t len)
 373 {
 374         const struct iw_michaelmicfailure *mic;
 375         union wpa_event_data data;
 376
 377         if (len < sizeof(*mic))
 378                 return -1;
 379
 380         mic = (const struct iw_michaelmicfailure *) ev;
 381
 382         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 383                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 384                    MAC2STR(mic->src_addr.sa_data));
 385
 386         os_memset(&data, 0, sizeof(data));
 387         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 388         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 389
 390         return 0;
 391 }
 392
 393
 394 static int wpa_driver_nl80211_event_wireless_pmkidcand(
 395         struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
 396 {
 397         const struct iw_pmkid_cand *cand;
 398         union wpa_event_data data;
 399         const u8 *addr;
 400
 401         if (len < sizeof(*cand))
 402                 return -1;
 403
 404         cand = (const struct iw_pmkid_cand *) ev;
 405         addr = (const u8 *) cand->bssid.sa_data;
 406
 407         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 408                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 409                    cand->index, MAC2STR(addr));
 410
 411         os_memset(&data, 0, sizeof(data));
 412         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 413         data.pmkid_candidate.index = cand->index;
 414         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 415         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 416
 417         return 0;
 418 }
 419
 420
 421 static int wpa_driver_nl80211_event_wireless_assocreqie(
 422         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 423 {
 424         if (len < 0)
 425                 return -1;
 426
 427         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 428                     len);
 429         os_free(drv->assoc_req_ies);
 430         drv->assoc_req_ies = os_malloc(len);
 431         if (drv->assoc_req_ies == NULL) {
 432                 drv->assoc_req_ies_len = 0;
 433                 return -1;
 434         }
 435         os_memcpy(drv->assoc_req_ies, ev, len);
 436         drv->assoc_req_ies_len = len;
 437
 438         return 0;
 439 }
 440
 441
 442 static int wpa_driver_nl80211_event_wireless_assocrespie(
 443         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 444 {
 445         if (len < 0)
 446                 return -1;
 447
 448         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 449                     len);
 450         os_free(drv->assoc_resp_ies);
 451         drv->assoc_resp_ies = os_malloc(len);
 452         if (drv->assoc_resp_ies == NULL) {
 453                 drv->assoc_resp_ies_len = 0;
 454                 return -1;
 455         }
 456         os_memcpy(drv->assoc_resp_ies, ev, len);
 457         drv->assoc_resp_ies_len = len;
 458
 459         return 0;
 460 }
 461
 462
 463 static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
 464 {
 465         union wpa_event_data data;
 466
 467         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 468                 return;
 469
 470         os_memset(&data, 0, sizeof(data));
 471         if (drv->assoc_req_ies) {
 472                 data.assoc_info.req_ies = drv->assoc_req_ies;
 473                 drv->assoc_req_ies = NULL;
 474                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 475         }
 476         if (drv->assoc_resp_ies) {
 477                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 478                 drv->assoc_resp_ies = NULL;
 479                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 480         }
 481
 482         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 483
 484         os_free(data.assoc_info.req_ies);
 485         os_free(data.assoc_info.resp_ies);
 486 }
 487
 488
 489 static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
 490                                            void *ctx, char *data, int len)
 491 {
 492         struct iw_event iwe_buf, *iwe = &iwe_buf;
 493         char *pos, *end, *custom, *buf;
 494
 495         pos = data;
 496         end = data + len;
 497
 498         while (pos + IW_EV_LCP_LEN <= end) {
 499                 /* Event data may be unaligned, so make a local, aligned copy
 500                  * before processing. */
 501                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 502                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 503                            iwe->cmd, iwe->len);
 504                 if (iwe->len <= IW_EV_LCP_LEN)
 505                         return;
 506
 507                 custom = pos + IW_EV_POINT_LEN;
 508                 if (drv->we_version_compiled > 18 &&
 509                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 510                      iwe->cmd == IWEVCUSTOM ||
 511                      iwe->cmd == IWEVASSOCREQIE ||
 512                      iwe->cmd == IWEVASSOCRESPIE ||
 513                      iwe->cmd == IWEVPMKIDCAND)) {
 514                         /* WE-19 removed the pointer from struct iw_point */
 515                         char *dpos = (char *) &iwe_buf.u.data.length;
 516                         int dlen = dpos - (char *) &iwe_buf;
 517                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 518                                   sizeof(struct iw_event) - dlen);
 519                 } else {
 520                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 521                         custom += IW_EV_POINT_OFF;
 522                 }
 523
 524                 switch (iwe->cmd) {
 525                 case SIOCGIWAP:
 526                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 527                                    MACSTR,
 528                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 529                         if (is_zero_ether_addr(
 530                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 531                             os_memcmp(iwe->u.ap_addr.sa_data,
 532                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 533                             0) {
 534                                 os_free(drv->assoc_req_ies);
 535                                 drv->assoc_req_ies = NULL;
 536                                 os_free(drv->assoc_resp_ies);
 537                                 drv->assoc_resp_ies = NULL;
 538                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 539                                                      NULL);
 540
 541                         } else {
 542                                 wpa_driver_nl80211_event_assoc_ies(drv);
 543                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 544                         }
 545                         break;
 546                 case IWEVMICHAELMICFAILURE:
 547                         wpa_driver_nl80211_event_wireless_michaelmicfailure(
 548                                 ctx, custom, iwe->u.data.length);
 549                         break;
 550                 case IWEVCUSTOM:
 551                         if (custom + iwe->u.data.length > end)
 552                                 return;
 553                         buf = os_malloc(iwe->u.data.length + 1);
 554                         if (buf == NULL)
 555                                 return;
 556                         os_memcpy(buf, custom, iwe->u.data.length);
 557                         buf[iwe->u.data.length] = '\0';
 558                         wpa_driver_nl80211_event_wireless_custom(ctx, buf);
 559                         os_free(buf);
 560                         break;
 561                 case SIOCGIWSCAN:
 562                         drv->scan_complete_events = 1;
 563                         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout,
 564                                              drv, ctx);
 565                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 566                         break;
 567                 case IWEVASSOCREQIE:
 568                         wpa_driver_nl80211_event_wireless_assocreqie(
 569                                 drv, custom, iwe->u.data.length);
 570                         break;
 571                 case IWEVASSOCRESPIE:
 572                         wpa_driver_nl80211_event_wireless_assocrespie(
 573                                 drv, custom, iwe->u.data.length);
 574                         break;
 575                 case IWEVPMKIDCAND:
 576                         wpa_driver_nl80211_event_wireless_pmkidcand(
 577                                 drv, custom, iwe->u.data.length);
 578                         break;
 579                 }
 580
 581                 pos += iwe->len;
 582         }
 583 }
 584
 585
 586 static void wpa_driver_nl80211_event_link(void *ctx, char *buf, size_t len,
 587                                        int del)
 588 {
 589         union wpa_event_data event;
 590
 591         os_memset(&event, 0, sizeof(event));
 592         if (len > sizeof(event.interface_status.ifname))
 593                 len = sizeof(event.interface_status.ifname) - 1;
 594         os_memcpy(event.interface_status.ifname, buf, len);
 595         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 596                 EVENT_INTERFACE_ADDED;
 597
 598         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 599                    del ? "DEL" : "NEW",
 600                    event.interface_status.ifname,
 601                    del ? "removed" : "added");
 602
 603         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 604 }
 605
 606
 607 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 608                                               void *ctx, struct nlmsghdr *h,
 609                                               size_t len)
 610 {
 611         struct ifinfomsg *ifi;
 612         int attrlen, _nlmsg_len, rta_len;
 613         struct rtattr * attr;
 614
 615         if (len < sizeof(*ifi))
 616                 return;
 617
 618         ifi = NLMSG_DATA(h);
 619
 620         if (drv->ifindex != ifi->ifi_index) {
 621                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 622                            ifi->ifi_index);
 623                 return;
 624         }
 625
 626         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 627                    "(%s%s%s%s)",
 628                    drv->operstate, ifi->ifi_flags,
 629                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 630                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 631                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 632                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 633         /*
 634          * Some drivers send the association event before the operup event--in
 635          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 636          * fails. This will hit us when wpa_supplicant does not need to do
 637          * IEEE 802.1X authentication
 638          */
 639         if (drv->operstate == 1 &&
 640             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 641             !(ifi->ifi_flags & IFF_RUNNING))
 642                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 643
 644         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 645
 646         attrlen = h->nlmsg_len - _nlmsg_len;
 647         if (attrlen < 0)
 648                 return;
 649
 650         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 651
 652         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 653         while (RTA_OK(attr, attrlen)) {
 654                 if (attr->rta_type == IFLA_WIRELESS) {
 655                         wpa_driver_nl80211_event_wireless(
 656                                 drv, ctx, ((char *) attr) + rta_len,
 657                                 attr->rta_len - rta_len);
 658                 } else if (attr->rta_type == IFLA_IFNAME) {
 659                         wpa_driver_nl80211_event_link(ctx,
 660                                                    ((char *) attr) + rta_len,
 661                                                    attr->rta_len - rta_len, 0);
 662                 }
 663                 attr = RTA_NEXT(attr, attrlen);
 664         }
 665 }
 666
 667
 668 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 669                                               void *ctx, struct nlmsghdr *h,
 670                                               size_t len)
 671 {
 672         struct ifinfomsg *ifi;
 673         int attrlen, _nlmsg_len, rta_len;
 674         struct rtattr * attr;
 675
 676         if (len < sizeof(*ifi))
 677                 return;
 678
 679         ifi = NLMSG_DATA(h);
 680
 681         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 682
 683         attrlen = h->nlmsg_len - _nlmsg_len;
 684         if (attrlen < 0)
 685                 return;
 686
 687         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 688
 689         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 690         while (RTA_OK(attr, attrlen)) {
 691                 if (attr->rta_type == IFLA_IFNAME) {
 692                         wpa_driver_nl80211_event_link(ctx,
 693                                                    ((char *) attr) + rta_len,
 694                                                    attr->rta_len - rta_len, 1);
 695                 }
 696                 attr = RTA_NEXT(attr, attrlen);
 697         }
 698 }
 699
 700
 701 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 702                                           void *sock_ctx)
 703 {
 704         char buf[8192];
 705         int left;
 706         struct sockaddr_nl from;
 707         socklen_t fromlen;
 708         struct nlmsghdr *h;
 709         int max_events = 10;
 710
 711 try_again:
 712         fromlen = sizeof(from);
 713         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 714                         (struct sockaddr *) &from, &fromlen);
 715         if (left < 0) {
 716                 if (errno != EINTR && errno != EAGAIN)
 717                         perror("recvfrom(netlink)");
 718                 return;
 719         }
 720
 721         h = (struct nlmsghdr *) buf;
 722         while (left >= (int) sizeof(*h)) {
 723                 int len, plen;
 724
 725                 len = h->nlmsg_len;
 726                 plen = len - sizeof(*h);
 727                 if (len > left || plen < 0) {
 728                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 729                                    "len=%d left=%d plen=%d",
 730                                    len, left, plen);
 731                         break;
 732                 }
 733
 734                 switch (h->nlmsg_type) {
 735                 case RTM_NEWLINK:
 736                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 737                                                           h, plen);
 738                         break;
 739                 case RTM_DELLINK:
 740                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 741                                                           h, plen);
 742                         break;
 743                 }
 744
 745                 len = NLMSG_ALIGN(len);
 746                 left -= len;
 747                 h = (struct nlmsghdr *) ((char *) h + len);
 748         }
 749
 750         if (left > 0) {
 751                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 752                            "message", left);
 753         }
 754
 755         if (--max_events > 0) {
 756                 /*
 757                  * Try to receive all events in one eloop call in order to
 758                  * limit race condition on cases where AssocInfo event, Assoc
 759                  * event, and EAPOL frames are received more or less at the
 760                  * same time. We want to process the event messages first
 761                  * before starting EAPOL processing.
 762                  */
 763                 goto try_again;
 764         }
 765 }
 766
 767
 768 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
 769                                               const char *ifname, int *flags)
 770 {
 771         struct ifreq ifr;
 772
 773         os_memset(&ifr, 0, sizeof(ifr));
 774         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 775         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 776                 perror("ioctl[SIOCGIFFLAGS]");
 777                 return -1;
 778         }
 779         *flags = ifr.ifr_flags & 0xffff;
 780         return 0;
 781 }
 782
 783
 784 /**
 785  * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 786  * @drv: driver_nl80211 private data
 787  * @flags: Pointer to returned flags value
 788  * Returns: 0 on success, -1 on failure
 789  */
 790 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
 791                                           int *flags)
 792 {
 793         return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
 794 }
 795
 796
 797 static int wpa_driver_nl80211_set_ifflags_ifname(
 798         struct wpa_driver_nl80211_data *drv,
 799         const char *ifname, int flags)
 800 {
 801         struct ifreq ifr;
 802
 803         os_memset(&ifr, 0, sizeof(ifr));
 804         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 805         ifr.ifr_flags = flags & 0xffff;
 806         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 807                 perror("SIOCSIFFLAGS");
 808                 return -1;
 809         }
 810         return 0;
 811 }
 812
 813
 814 /**
 815  * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 816  * @drv: driver_nl80211 private data
 817  * @flags: New value for flags
 818  * Returns: 0 on success, -1 on failure
 819  */
 820 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
 821                                           int flags)
 822 {
 823         return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
 824 }
 825
 826
 827 /**
 828  * wpa_driver_nl80211_init - Initialize WE driver interface
 829  * @ctx: context to be used when calling wpa_supplicant functions,
 830  * e.g., wpa_supplicant_event()
 831  * @ifname: interface name, e.g., wlan0
 832  * Returns: Pointer to private data, %NULL on failure
 833  */
 834 void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
 835 {
 836         int s, flags;
 837         struct sockaddr_nl local;
 838         struct wpa_driver_nl80211_data *drv;
 839
 840         drv = os_zalloc(sizeof(*drv));
 841         if (drv == NULL)
 842                 return NULL;
 843         drv->ctx = ctx;
 844         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 845
 846         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
 847         if (drv->nl_cb == NULL) {
 848                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
 849                            "callbacks");
 850                 goto err1;
 851         }
 852
 853         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
 854         if (drv->nl_handle == NULL) {
 855                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
 856                            "callbacks");
 857                 goto err2;
 858         }
 859
 860         if (genl_connect(drv->nl_handle)) {
 861                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
 862                            "netlink");
 863                 goto err3;
 864         }
 865
 866         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
 867         if (drv->nl_cache == NULL) {
 868                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
 869                            "netlink cache");
 870                 goto err3;
 871         }
 872
 873         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
 874         if (drv->nl80211 == NULL) {
 875                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
 876                            "found");
 877                 goto err4;
 878         }
 879
 880         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
 881         if (drv->ioctl_sock < 0) {
 882                 perror("socket(PF_INET,SOCK_DGRAM)");
 883                 goto err5;
 884         }
 885
 886         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 887         if (s < 0) {
 888                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
 889                 goto err6;
 890         }
 891
 892         os_memset(&local, 0, sizeof(local));
 893         local.nl_family = AF_NETLINK;
 894         local.nl_groups = RTMGRP_LINK;
 895         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
 896                 perror("bind(netlink)");
 897                 close(s);
 898                 goto err6;
 899         }
 900
 901         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive, drv,
 902                                  ctx);
 903         drv->event_sock = s;
 904
 905         if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0)
 906                 printf("Could not get interface '%s' flags\n", drv->ifname);
 907         else if (!(flags & IFF_UP)) {
 908                 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
 909                         printf("Could not set interface '%s' UP\n",
 910                                drv->ifname);
 911                 } else {
 912                         /*
 913                          * Wait some time to allow driver to initialize before
 914                          * starting configuring the driver. This seems to be
 915                          * needed at least some drivers that load firmware etc.
 916                          * when the interface is set up.
 917                          */
 918                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
 919                                    "a second for the driver to complete "
 920                                    "initialization", drv->ifname);
 921                         sleep(1);
 922                 }
 923         }
 924
 925         /*
 926          * Make sure that the driver does not have any obsolete PMKID entries.
 927          */
 928         wpa_driver_nl80211_flush_pmkid(drv);
 929
 930         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
 931                 printf("Could not configure driver to use managed mode\n");
 932         }
 933
 934         wpa_driver_nl80211_get_range(drv);
 935
 936         drv->ifindex = if_nametoindex(drv->ifname);
 937
 938         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
 939
 940         return drv;
 941
 942 err6:
 943         close(drv->ioctl_sock);
 944 err5:
 945         genl_family_put(drv->nl80211);
 946 err4:
 947         nl_cache_free(drv->nl_cache);
 948 err3:
 949         nl_handle_destroy(drv->nl_handle);
 950 err2:
 951         nl_cb_put(drv->nl_cb);
 952 err1:
 953         os_free(drv);
 954         return NULL;
 955 }
 956
 957
 958 /**
 959  * wpa_driver_nl80211_deinit - Deinitialize WE driver interface
 960  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
 961  *
 962  * Shut down driver interface and processing of driver events. Free
 963  * private data buffer if one was allocated in wpa_driver_nl80211_init().
 964  */
 965 void wpa_driver_nl80211_deinit(void *priv)
 966 {
 967         struct wpa_driver_nl80211_data *drv = priv;
 968         int flags;
 969
 970         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
 971
 972         /*
 973          * Clear possibly configured driver parameters in order to make it
 974          * easier to use the driver after wpa_supplicant has been terminated.
 975          */
 976         (void) wpa_driver_nl80211_set_bssid(drv,
 977                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
 978
 979         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
 980
 981         eloop_unregister_read_sock(drv->event_sock);
 982
 983         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
 984                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
 985
 986         close(drv->event_sock);
 987         close(drv->ioctl_sock);
 988         os_free(drv->assoc_req_ies);
 989         os_free(drv->assoc_resp_ies);
 990
 991         genl_family_put(drv->nl80211);
 992         nl_cache_free(drv->nl_cache);
 993         nl_handle_destroy(drv->nl_handle);
 994         nl_cb_put(drv->nl_cb);
 995
 996         os_free(drv);
 997 }
 998
 999
1000 /**
1001  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1002  * @eloop_ctx: Unused
1003  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1004  *
1005  * This function can be used as registered timeout when starting a scan to
1006  * generate a scan completed event if the driver does not report this.
1007  */
1008 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1009 {
1010         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1011         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1012 }
1013
1014
1015 /**
1016  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1017  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1018  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1019  *      all SSIDs (either active scan with broadcast SSID or passive
1020  *      scan
1021  * @ssid_len: Length of the SSID
1022  * Returns: 0 on success, -1 on failure
1023  */
1024 static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len)
1025 {
1026         struct wpa_driver_nl80211_data *drv = priv;
1027         struct iwreq iwr;
1028         int ret = 0, timeout;
1029         struct iw_scan_req req;
1030
1031         if (ssid_len > IW_ESSID_MAX_SIZE) {
1032                 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1033                            __FUNCTION__, (unsigned long) ssid_len);
1034                 return -1;
1035         }
1036
1037         os_memset(&iwr, 0, sizeof(iwr));
1038         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1039
1040         if (ssid && ssid_len) {
1041                 os_memset(&req, 0, sizeof(req));
1042                 req.essid_len = ssid_len;
1043                 req.bssid.sa_family = ARPHRD_ETHER;
1044                 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1045                 os_memcpy(req.essid, ssid, ssid_len);
1046                 iwr.u.data.pointer = (caddr_t) &req;
1047                 iwr.u.data.length = sizeof(req);
1048                 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1049         }
1050
1051         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1052                 perror("ioctl[SIOCSIWSCAN]");
1053                 ret = -1;
1054         }
1055
1056         /* Not all drivers generate "scan completed" wireless event, so try to
1057          * read results after a timeout. */
1058         timeout = 5;
1059         if (drv->scan_complete_events) {
1060                 /*
1061                  * The driver seems to deliver SIOCGIWSCAN events to notify
1062                  * when scan is complete, so use longer timeout to avoid race
1063                  * conditions with scanning and following association request.
1064                  */
1065                 timeout = 30;
1066         }
1067         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1068                    "seconds", ret, timeout);
1069         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1070         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout, drv,
1071                                drv->ctx);
1072
1073         return ret;
1074 }
1075
1076
1077 static u8 * wpa_driver_nl80211_giwscan(struct wpa_driver_nl80211_data *drv,
1078                                     size_t *len)
1079 {
1080         struct iwreq iwr;
1081         u8 *res_buf;
1082         size_t res_buf_len;
1083
1084         res_buf_len = IW_SCAN_MAX_DATA;
1085         for (;;) {
1086                 res_buf = os_malloc(res_buf_len);
1087                 if (res_buf == NULL)
1088                         return NULL;
1089                 os_memset(&iwr, 0, sizeof(iwr));
1090                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1091                 iwr.u.data.pointer = res_buf;
1092                 iwr.u.data.length = res_buf_len;
1093
1094                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1095                         break;
1096
1097                 if (errno == E2BIG && res_buf_len < 100000) {
1098                         os_free(res_buf);
1099                         res_buf = NULL;
1100                         res_buf_len *= 2;
1101                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1102                                    "trying larger buffer (%lu bytes)",
1103                                    (unsigned long) res_buf_len);
1104                 } else {
1105                         perror("ioctl[SIOCGIWSCAN]");
1106                         os_free(res_buf);
1107                         return NULL;
1108                 }
1109         }
1110
1111         if (iwr.u.data.length > res_buf_len) {
1112                 os_free(res_buf);
1113                 return NULL;
1114         }
1115         *len = iwr.u.data.length;
1116
1117         return res_buf;
1118 }
1119
1120
1121 /*
1122  * Data structure for collecting WEXT scan results. This is needed to allow
1123  * the various methods of reporting IEs to be combined into a single IE buffer.
1124  */
1125 struct wext_scan_data {
1126         struct wpa_scan_res res;
1127         u8 *ie;
1128         size_t ie_len;
1129         u8 ssid[32];
1130         size_t ssid_len;
1131         int maxrate;
1132 };
1133
1134
1135 static void wext_get_scan_mode(struct iw_event *iwe,
1136                                struct wext_scan_data *res)
1137 {
1138         if (iwe->u.mode == IW_MODE_ADHOC)
1139                 res->res.caps |= IEEE80211_CAP_IBSS;
1140         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1141                 res->res.caps |= IEEE80211_CAP_ESS;
1142 }
1143
1144
1145 static void wext_get_scan_ssid(struct iw_event *iwe,
1146                                struct wext_scan_data *res, char *custom,
1147                                char *end)
1148 {
1149         int ssid_len = iwe->u.essid.length;
1150         if (custom + ssid_len > end)
1151                 return;
1152         if (iwe->u.essid.flags &&
1153             ssid_len > 0 &&
1154             ssid_len <= IW_ESSID_MAX_SIZE) {
1155                 os_memcpy(res->ssid, custom, ssid_len);
1156                 res->ssid_len = ssid_len;
1157         }
1158 }
1159
1160
1161 static void wext_get_scan_freq(struct iw_event *iwe,
1162                                struct wext_scan_data *res)
1163 {
1164         int divi = 1000000, i;
1165
1166         if (iwe->u.freq.e == 0) {
1167                 /*
1168                  * Some drivers do not report frequency, but a channel.
1169                  * Try to map this to frequency by assuming they are using
1170                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1171                  * frequency if the driver sends both frequency and channel,
1172                  * since the driver may be sending an A-band channel that we
1173                  * don't handle here.
1174                  */
1175
1176                 if (res->res.freq)
1177                         return;
1178
1179                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1180                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1181                         return;
1182                 } else if (iwe->u.freq.m == 14) {
1183                         res->res.freq = 2484;
1184                         return;
1185                 }
1186         }
1187
1188         if (iwe->u.freq.e > 6) {
1189                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1190                            MACSTR " m=%d e=%d)",
1191                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1192                            iwe->u.freq.e);
1193                 return;
1194         }
1195
1196         for (i = 0; i < iwe->u.freq.e; i++)
1197                 divi /= 10;
1198         res->res.freq = iwe->u.freq.m / divi;
1199 }
1200
1201
1202 static void wext_get_scan_qual(struct iw_event *iwe,
1203                                struct wext_scan_data *res)
1204 {
1205         res->res.qual = iwe->u.qual.qual;
1206         res->res.noise = iwe->u.qual.noise;
1207         res->res.level = iwe->u.qual.level;
1208 }
1209
1210
1211 static void wext_get_scan_encode(struct iw_event *iwe,
1212                                  struct wext_scan_data *res)
1213 {
1214         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1215                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1216 }
1217
1218
1219 static void wext_get_scan_rate(struct iw_event *iwe,
1220                                struct wext_scan_data *res, char *pos,
1221                                char *end)
1222 {
1223         int maxrate;
1224         char *custom = pos + IW_EV_LCP_LEN;
1225         struct iw_param p;
1226         size_t clen;
1227
1228         clen = iwe->len;
1229         if (custom + clen > end)
1230                 return;
1231         maxrate = 0;
1232         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1233                 /* Note: may be misaligned, make a local, aligned copy */
1234                 os_memcpy(&p, custom, sizeof(struct iw_param));
1235                 if (p.value > maxrate)
1236                         maxrate = p.value;
1237                 clen -= sizeof(struct iw_param);
1238                 custom += sizeof(struct iw_param);
1239         }
1240         res->maxrate = maxrate;
1241 }
1242
1243
1244 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1245                                     struct wext_scan_data *res, char *custom,
1246                                     char *end)
1247 {
1248         char *genie, *gpos, *gend;
1249         u8 *tmp;
1250
1251         gpos = genie = custom;
1252         gend = genie + iwe->u.data.length;
1253         if (gend > end) {
1254                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1255                 return;
1256         }
1257
1258         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1259         if (tmp == NULL)
1260                 return;
1261         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1262         res->ie = tmp;
1263         res->ie_len += gend - gpos;
1264 }
1265
1266
1267 static void wext_get_scan_custom(struct iw_event *iwe,
1268                                  struct wext_scan_data *res, char *custom,
1269                                  char *end)
1270 {
1271         size_t clen;
1272         u8 *tmp;
1273
1274         clen = iwe->u.data.length;
1275         if (custom + clen > end)
1276                 return;
1277
1278         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1279                 char *spos;
1280                 int bytes;
1281                 spos = custom + 7;
1282                 bytes = custom + clen - spos;
1283                 if (bytes & 1)
1284                         return;
1285                 bytes /= 2;
1286                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1287                 if (tmp == NULL)
1288                         return;
1289                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1290                 res->ie = tmp;
1291                 res->ie_len += bytes;
1292         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1293                 char *spos;
1294                 int bytes;
1295                 spos = custom + 7;
1296                 bytes = custom + clen - spos;
1297                 if (bytes & 1)
1298                         return;
1299                 bytes /= 2;
1300                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1301                 if (tmp == NULL)
1302                         return;
1303                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1304                 res->ie = tmp;
1305                 res->ie_len += bytes;
1306         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1307                 char *spos;
1308                 int bytes;
1309                 u8 bin[8];
1310                 spos = custom + 4;
1311                 bytes = custom + clen - spos;
1312                 if (bytes != 16) {
1313                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1314                         return;
1315                 }
1316                 bytes /= 2;
1317                 hexstr2bin(spos, bin, bytes);
1318                 res->res.tsf += WPA_GET_BE64(bin);
1319         }
1320 }
1321
1322
1323 static int wext_19_iw_point(struct wpa_driver_nl80211_data *drv, u16 cmd)
1324 {
1325         return drv->we_version_compiled > 18 &&
1326                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1327                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1328 }
1329
1330
1331 static void wpa_driver_nl80211_add_scan_entry(struct wpa_scan_results *res,
1332                                            struct wext_scan_data *data)
1333 {
1334         struct wpa_scan_res **tmp;
1335         struct wpa_scan_res *r;
1336         size_t extra_len;
1337         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1338
1339         /* Figure out whether we need to fake any IEs */
1340         pos = data->ie;
1341         end = pos + data->ie_len;
1342         while (pos && pos + 1 < end) {
1343                 if (pos + 2 + pos[1] > end)
1344                         break;
1345                 if (pos[0] == WLAN_EID_SSID)
1346                         ssid_ie = pos;
1347                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1348                         rate_ie = pos;
1349                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1350                         rate_ie = pos;
1351                 pos += 2 + pos[1];
1352         }
1353
1354         extra_len = 0;
1355         if (ssid_ie == NULL)
1356                 extra_len += 2 + data->ssid_len;
1357         if (rate_ie == NULL && data->maxrate)
1358                 extra_len += 3;
1359
1360         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1361         if (r == NULL)
1362                 return;
1363         os_memcpy(r, &data->res, sizeof(*r));
1364         r->ie_len = extra_len + data->ie_len;
1365         pos = (u8 *) (r + 1);
1366         if (ssid_ie == NULL) {
1367                 /*
1368                  * Generate a fake SSID IE since the driver did not report
1369                  * a full IE list.
1370                  */
1371                 *pos++ = WLAN_EID_SSID;
1372                 *pos++ = data->ssid_len;
1373                 os_memcpy(pos, data->ssid, data->ssid_len);
1374                 pos += data->ssid_len;
1375         }
1376         if (rate_ie == NULL && data->maxrate) {
1377                 /*
1378                  * Generate a fake Supported Rates IE since the driver did not
1379                  * report a full IE list.
1380                  */
1381                 *pos++ = WLAN_EID_SUPP_RATES;
1382                 *pos++ = 1;
1383                 *pos++ = data->maxrate;
1384         }
1385         if (data->ie)
1386                 os_memcpy(pos, data->ie, data->ie_len);
1387
1388         tmp = os_realloc(res->res,
1389                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1390         if (tmp == NULL) {
1391                 os_free(r);
1392                 return;
1393         }
1394         tmp[res->num++] = r;
1395         res->res = tmp;
1396 }
1397
1398
1399 /**
1400  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1401  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1402  * Returns: Scan results on success, -1 on failure
1403  */
1404 struct wpa_scan_results * wpa_driver_nl80211_get_scan_results(void *priv)
1405 {
1406         struct wpa_driver_nl80211_data *drv = priv;
1407         size_t ap_num = 0, len;
1408         int first;
1409         u8 *res_buf;
1410         struct iw_event iwe_buf, *iwe = &iwe_buf;
1411         char *pos, *end, *custom;
1412         struct wpa_scan_results *res;
1413         struct wext_scan_data data;
1414
1415         res_buf = wpa_driver_nl80211_giwscan(drv, &len);
1416         if (res_buf == NULL)
1417                 return NULL;
1418
1419         ap_num = 0;
1420         first = 1;
1421
1422         res = os_zalloc(sizeof(*res));
1423         if (res == NULL) {
1424                 os_free(res_buf);
1425                 return NULL;
1426         }
1427
1428         pos = (char *) res_buf;
1429         end = (char *) res_buf + len;
1430         os_memset(&data, 0, sizeof(data));
1431
1432         while (pos + IW_EV_LCP_LEN <= end) {
1433                 /* Event data may be unaligned, so make a local, aligned copy
1434                  * before processing. */
1435                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1436                 if (iwe->len <= IW_EV_LCP_LEN)
1437                         break;
1438
1439                 custom = pos + IW_EV_POINT_LEN;
1440                 if (wext_19_iw_point(drv, iwe->cmd)) {
1441                         /* WE-19 removed the pointer from struct iw_point */
1442                         char *dpos = (char *) &iwe_buf.u.data.length;
1443                         int dlen = dpos - (char *) &iwe_buf;
1444                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1445                                   sizeof(struct iw_event) - dlen);
1446                 } else {
1447                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1448                         custom += IW_EV_POINT_OFF;
1449                 }
1450
1451                 switch (iwe->cmd) {
1452                 case SIOCGIWAP:
1453                         if (!first)
1454                                 wpa_driver_nl80211_add_scan_entry(res, &data);
1455                         first = 0;
1456                         os_free(data.ie);
1457                         os_memset(&data, 0, sizeof(data));
1458                         os_memcpy(data.res.bssid,
1459                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1460                         break;
1461                 case SIOCGIWMODE:
1462                         wext_get_scan_mode(iwe, &data);
1463                         break;
1464                 case SIOCGIWESSID:
1465                         wext_get_scan_ssid(iwe, &data, custom, end);
1466                         break;
1467                 case SIOCGIWFREQ:
1468                         wext_get_scan_freq(iwe, &data);
1469                         break;
1470                 case IWEVQUAL:
1471                         wext_get_scan_qual(iwe, &data);
1472                         break;
1473                 case SIOCGIWENCODE:
1474                         wext_get_scan_encode(iwe, &data);
1475                         break;
1476                 case SIOCGIWRATE:
1477                         wext_get_scan_rate(iwe, &data, pos, end);
1478                         break;
1479                 case IWEVGENIE:
1480                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1481                         break;
1482                 case IWEVCUSTOM:
1483                         wext_get_scan_custom(iwe, &data, custom, end);
1484                         break;
1485                 }
1486
1487                 pos += iwe->len;
1488         }
1489         os_free(res_buf);
1490         res_buf = NULL;
1491         if (!first)
1492                 wpa_driver_nl80211_add_scan_entry(res, &data);
1493         os_free(data.ie);
1494
1495         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1496                    (unsigned long) len, (unsigned long) res->num);
1497
1498         return res;
1499 }
1500
1501
1502 static int wpa_driver_nl80211_get_range(void *priv)
1503 {
1504         struct wpa_driver_nl80211_data *drv = priv;
1505         struct iw_range *range;
1506         struct iwreq iwr;
1507         int minlen;
1508         size_t buflen;
1509
1510         /*
1511          * Use larger buffer than struct iw_range in order to allow the
1512          * structure to grow in the future.
1513          */
1514         buflen = sizeof(struct iw_range) + 500;
1515         range = os_zalloc(buflen);
1516         if (range == NULL)
1517                 return -1;
1518
1519         os_memset(&iwr, 0, sizeof(iwr));
1520         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1521         iwr.u.data.pointer = (caddr_t) range;
1522         iwr.u.data.length = buflen;
1523
1524         minlen = ((char *) &range->enc_capa) - (char *) range +
1525                 sizeof(range->enc_capa);
1526
1527         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1528                 perror("ioctl[SIOCGIWRANGE]");
1529                 os_free(range);
1530                 return -1;
1531         } else if (iwr.u.data.length >= minlen &&
1532                    range->we_version_compiled >= 18) {
1533                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1534                            "WE(source)=%d enc_capa=0x%x",
1535                            range->we_version_compiled,
1536                            range->we_version_source,
1537                            range->enc_capa);
1538                 drv->has_capability = 1;
1539                 drv->we_version_compiled = range->we_version_compiled;
1540                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1541                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1542                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1543                 }
1544                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1545                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1546                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1547                 }
1548                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1549                         WPA_DRIVER_CAPA_ENC_WEP104;
1550                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1551                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1552                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1553                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1554                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
1555                            drv->capa.key_mgmt, drv->capa.enc);
1556         } else {
1557                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1558                            "assuming WPA is not supported");
1559         }
1560
1561         os_free(range);
1562         return 0;
1563 }
1564
1565
1566 static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
1567 {
1568         struct wpa_driver_nl80211_data *drv = priv;
1569         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1570
1571         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1572                                               enabled);
1573 }
1574
1575
1576 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1577                                       const u8 *addr, int key_idx,
1578                                       int set_tx, const u8 *seq,
1579                                       size_t seq_len,
1580                                       const u8 *key, size_t key_len)
1581 {
1582         struct wpa_driver_nl80211_data *drv = priv;
1583         int ret = -1, err;
1584         struct nl_msg *msg;
1585
1586         wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
1587                    "seq_len=%lu key_len=%lu",
1588                    __func__, alg, addr, key_idx, set_tx,
1589                    (unsigned long) seq_len, (unsigned long) key_len);
1590
1591         msg = nlmsg_alloc();
1592         if (msg == NULL)
1593                 return -1;
1594
1595         if (alg == WPA_ALG_NONE) {
1596                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1597                             NL80211_CMD_DEL_KEY, 0);
1598         } else {
1599                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1600                             NL80211_CMD_NEW_KEY, 0);
1601                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1602                 switch (alg) {
1603                 case WPA_ALG_WEP:
1604                         if (key_len == 5)
1605                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1606                                             0x000FAC01);
1607                         else
1608                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1609                                             0x000FAC05);
1610                         break;
1611                 case WPA_ALG_TKIP:
1612                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1613                         break;
1614                 case WPA_ALG_CCMP:
1615                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1616                         break;
1617                 default:
1618                         nlmsg_free(msg);
1619                         return -1;
1620                 }
1621         }
1622
1623         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1624         {
1625                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1626                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1627         }
1628         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1629         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1630
1631         err = 0;
1632         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1633             (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
1634                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
1635                 nlmsg_free(msg);
1636                 return -1;
1637         }
1638
1639         if (set_tx && alg != WPA_ALG_NONE) {
1640                 nlmsg_free(msg);
1641                 msg = nlmsg_alloc();
1642                 if (msg == NULL)
1643                         return -1;
1644
1645                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1646                             0, NL80211_CMD_SET_KEY, 0);
1647                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1648                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1649                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1650
1651                 err = 0;
1652                 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1653                     (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
1654                         wpa_printf(MSG_DEBUG, "nl80211: set default key "
1655                                    "failed; err=%d", err);
1656                         nlmsg_free(msg);
1657                         return -1;
1658                 }
1659         }
1660
1661         ret = 0;
1662
1663 nla_put_failure:
1664         nlmsg_free(msg);
1665         return ret;
1666 }
1667
1668
1669 static int wpa_driver_nl80211_set_countermeasures(void *priv,
1670                                                int enabled)
1671 {
1672         struct wpa_driver_nl80211_data *drv = priv;
1673         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1674         return wpa_driver_nl80211_set_auth_param(drv,
1675                                               IW_AUTH_TKIP_COUNTERMEASURES,
1676                                               enabled);
1677 }
1678
1679
1680 static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
1681                                                 int enabled)
1682 {
1683         struct wpa_driver_nl80211_data *drv = priv;
1684         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1685         drv->use_crypt = enabled;
1686         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1687                                               enabled);
1688 }
1689
1690
1691 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1692                                 const u8 *addr, int cmd, int reason_code)
1693 {
1694         struct iwreq iwr;
1695         struct iw_mlme mlme;
1696         int ret = 0;
1697
1698         os_memset(&iwr, 0, sizeof(iwr));
1699         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1700         os_memset(&mlme, 0, sizeof(mlme));
1701         mlme.cmd = cmd;
1702         mlme.reason_code = reason_code;
1703         mlme.addr.sa_family = ARPHRD_ETHER;
1704         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1705         iwr.u.data.pointer = (caddr_t) &mlme;
1706         iwr.u.data.length = sizeof(mlme);
1707
1708         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1709                 perror("ioctl[SIOCSIWMLME]");
1710                 ret = -1;
1711         }
1712
1713         return ret;
1714 }
1715
1716
1717 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1718                                           int reason_code)
1719 {
1720         struct wpa_driver_nl80211_data *drv = priv;
1721         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1722         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
1723 }
1724
1725
1726 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1727                                         int reason_code)
1728 {
1729         struct wpa_driver_nl80211_data *drv = priv;
1730         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1731         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DISASSOC,
1732                                     reason_code);
1733 }
1734
1735
1736 static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
1737                                       size_t ie_len)
1738 {
1739         struct wpa_driver_nl80211_data *drv = priv;
1740         struct iwreq iwr;
1741         int ret = 0;
1742
1743         os_memset(&iwr, 0, sizeof(iwr));
1744         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1745         iwr.u.data.pointer = (caddr_t) ie;
1746         iwr.u.data.length = ie_len;
1747
1748         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
1749                 perror("ioctl[SIOCSIWGENIE]");
1750                 ret = -1;
1751         }
1752
1753         return ret;
1754 }
1755
1756
1757 static int wpa_driver_nl80211_cipher2wext(int cipher)
1758 {
1759         switch (cipher) {
1760         case CIPHER_NONE:
1761                 return IW_AUTH_CIPHER_NONE;
1762         case CIPHER_WEP40:
1763                 return IW_AUTH_CIPHER_WEP40;
1764         case CIPHER_TKIP:
1765                 return IW_AUTH_CIPHER_TKIP;
1766         case CIPHER_CCMP:
1767                 return IW_AUTH_CIPHER_CCMP;
1768         case CIPHER_WEP104:
1769                 return IW_AUTH_CIPHER_WEP104;
1770         default:
1771                 return 0;
1772         }
1773 }
1774
1775
1776 static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
1777 {
1778         switch (keymgmt) {
1779         case KEY_MGMT_802_1X:
1780         case KEY_MGMT_802_1X_NO_WPA:
1781                 return IW_AUTH_KEY_MGMT_802_1X;
1782         case KEY_MGMT_PSK:
1783                 return IW_AUTH_KEY_MGMT_PSK;
1784         default:
1785                 return 0;
1786         }
1787 }
1788
1789
1790 static int
1791 wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
1792                                   struct wpa_driver_associate_params *params)
1793 {
1794         struct iwreq iwr;
1795         int ret = 0;
1796
1797         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1798                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1799
1800         os_memset(&iwr, 0, sizeof(iwr));
1801         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1802         /* Just changing mode, not actual keys */
1803         iwr.u.encoding.flags = 0;
1804         iwr.u.encoding.pointer = (caddr_t) NULL;
1805         iwr.u.encoding.length = 0;
1806
1807         /*
1808          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
1809          * different things. Here they are used to indicate Open System vs.
1810          * Shared Key authentication algorithm. However, some drivers may use
1811          * them to select between open/restricted WEP encrypted (open = allow
1812          * both unencrypted and encrypted frames; restricted = only allow
1813          * encrypted frames).
1814          */
1815
1816         if (!drv->use_crypt) {
1817                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1818         } else {
1819                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1820                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
1821                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1822                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
1823         }
1824
1825         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1826                 perror("ioctl[SIOCSIWENCODE]");
1827                 ret = -1;
1828         }
1829
1830         return ret;
1831 }
1832
1833
1834 static int wpa_driver_nl80211_associate(
1835         void *priv, struct wpa_driver_associate_params *params)
1836 {
1837         struct wpa_driver_nl80211_data *drv = priv;
1838         int ret = 0;
1839         int allow_unencrypted_eapol;
1840         int value;
1841
1842         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1843
1844         /*
1845          * If the driver did not support SIOCSIWAUTH, fallback to
1846          * SIOCSIWENCODE here.
1847          */
1848         if (drv->auth_alg_fallback &&
1849             wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
1850                 ret = -1;
1851
1852         if (!params->bssid &&
1853             wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
1854                 ret = -1;
1855
1856         if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
1857                 ret = -1;
1858         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
1859          * from configuration, not from here, where only the selected suite is
1860          * available */
1861         if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
1862             < 0)
1863                 ret = -1;
1864         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
1865                 value = IW_AUTH_WPA_VERSION_DISABLED;
1866         else if (params->wpa_ie[0] == WLAN_EID_RSN)
1867                 value = IW_AUTH_WPA_VERSION_WPA2;
1868         else
1869                 value = IW_AUTH_WPA_VERSION_WPA;
1870         if (wpa_driver_nl80211_set_auth_param(drv,
1871                                            IW_AUTH_WPA_VERSION, value) < 0)
1872                 ret = -1;
1873         value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
1874         if (wpa_driver_nl80211_set_auth_param(drv,
1875                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
1876                 ret = -1;
1877         value = wpa_driver_nl80211_cipher2wext(params->group_suite);
1878         if (wpa_driver_nl80211_set_auth_param(drv,
1879                                            IW_AUTH_CIPHER_GROUP, value) < 0)
1880                 ret = -1;
1881         value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
1882         if (wpa_driver_nl80211_set_auth_param(drv,
1883                                            IW_AUTH_KEY_MGMT, value) < 0)
1884                 ret = -1;
1885         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
1886                 params->pairwise_suite != CIPHER_NONE ||
1887                 params->group_suite != CIPHER_NONE ||
1888                 params->wpa_ie_len;
1889         if (wpa_driver_nl80211_set_auth_param(drv,
1890                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
1891                 ret = -1;
1892
1893         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
1894          * not using WPA. IEEE 802.1X specifies that these frames are not
1895          * encrypted, but WPA encrypts them when pairwise keys are in use. */
1896         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
1897             params->key_mgmt_suite == KEY_MGMT_PSK)
1898                 allow_unencrypted_eapol = 0;
1899         else
1900                 allow_unencrypted_eapol = 1;
1901
1902         if (wpa_driver_nl80211_set_auth_param(drv,
1903                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
1904                                            allow_unencrypted_eapol) < 0)
1905                 ret = -1;
1906         if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
1907                 ret = -1;
1908         if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
1909                 ret = -1;
1910         if (params->bssid &&
1911             wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
1912                 ret = -1;
1913
1914         return ret;
1915 }
1916
1917
1918 static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
1919 {
1920         struct wpa_driver_nl80211_data *drv = priv;
1921         int algs = 0, res;
1922
1923         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
1924                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
1925         if (auth_alg & AUTH_ALG_SHARED_KEY)
1926                 algs |= IW_AUTH_ALG_SHARED_KEY;
1927         if (auth_alg & AUTH_ALG_LEAP)
1928                 algs |= IW_AUTH_ALG_LEAP;
1929         if (algs == 0) {
1930                 /* at least one algorithm should be set */
1931                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
1932         }
1933
1934         res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
1935                                              algs);
1936         drv->auth_alg_fallback = res == -2;
1937         return res;
1938 }
1939
1940
1941 /**
1942  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
1943  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1944  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
1945  * Returns: 0 on success, -1 on failure
1946  */
1947 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
1948 {
1949         struct wpa_driver_nl80211_data *drv = priv;
1950         int ret = -1, flags;
1951         struct nl_msg *msg;
1952
1953         msg = nlmsg_alloc();
1954         if (!msg)
1955                 return -1;
1956
1957         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1958                     0, NL80211_CMD_SET_INTERFACE, 0);
1959         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1960         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1961
1962         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1963             nl_wait_for_ack(drv->nl_handle) < 0)
1964                 goto try_again;
1965
1966         nlmsg_free(msg);
1967         return 0;
1968
1969 nla_put_failure:
1970         nlmsg_free(msg);
1971         return -1;
1972
1973 try_again:
1974         /* mac80211 doesn't allow mode changes while the device is up, so
1975          * take the device down, try to set the mode again, and bring the
1976          * device back up.
1977          */
1978         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
1979                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1980
1981                 /* Try to set the mode again while the interface is down */
1982                 if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1983                     nl_wait_for_ack(drv->nl_handle) < 0) {
1984                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
1985                                    "mode", drv->ifname);
1986                 } else
1987                         ret = 0;
1988
1989                 /* Ignore return value of get_ifflags to ensure that the device
1990                  * is always up like it was before this function was called.
1991                  */
1992                 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
1993                 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
1994         }
1995
1996         nlmsg_free(msg);
1997         return ret;
1998 }
1999
2000
2001 static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
2002                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2003 {
2004         struct iwreq iwr;
2005         struct iw_pmksa pmksa;
2006         int ret = 0;
2007
2008         os_memset(&iwr, 0, sizeof(iwr));
2009         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2010         os_memset(&pmksa, 0, sizeof(pmksa));
2011         pmksa.cmd = cmd;
2012         pmksa.bssid.sa_family = ARPHRD_ETHER;
2013         if (bssid)
2014                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2015         if (pmkid)
2016                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2017         iwr.u.data.pointer = (caddr_t) &pmksa;
2018         iwr.u.data.length = sizeof(pmksa);
2019
2020         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2021                 if (errno != EOPNOTSUPP)
2022                         perror("ioctl[SIOCSIWPMKSA]");
2023                 ret = -1;
2024         }
2025
2026         return ret;
2027 }
2028
2029
2030 static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
2031                                      const u8 *pmkid)
2032 {
2033         struct wpa_driver_nl80211_data *drv = priv;
2034         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2035 }
2036
2037
2038 static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
2039                                         const u8 *pmkid)
2040 {
2041         struct wpa_driver_nl80211_data *drv = priv;
2042         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2043 }
2044
2045
2046 static int wpa_driver_nl80211_flush_pmkid(void *priv)
2047 {
2048         struct wpa_driver_nl80211_data *drv = priv;
2049         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2050 }
2051
2052
2053 static int wpa_driver_nl80211_get_capa(void *priv,
2054                                        struct wpa_driver_capa *capa)
2055 {
2056         struct wpa_driver_nl80211_data *drv = priv;
2057         if (!drv->has_capability)
2058                 return -1;
2059         os_memcpy(capa, &drv->capa, sizeof(*capa));
2060         return 0;
2061 }
2062
2063
2064 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2065 {
2066         struct wpa_driver_nl80211_data *drv = priv;
2067
2068         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2069                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2070         drv->operstate = state;
2071         return wpa_driver_nl80211_send_oper_ifla(
2072                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2073 }
2074
2075
2076 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2077         .name = "nl80211",
2078         .desc = "Linux nl80211/cfg80211",
2079         .get_bssid = wpa_driver_nl80211_get_bssid,
2080         .get_ssid = wpa_driver_nl80211_get_ssid,
2081         .set_wpa = wpa_driver_nl80211_set_wpa,
2082         .set_key = wpa_driver_nl80211_set_key,
2083         .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
2084         .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
2085         .scan = wpa_driver_nl80211_scan,
2086         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
2087         .deauthenticate = wpa_driver_nl80211_deauthenticate,
2088         .disassociate = wpa_driver_nl80211_disassociate,
2089         .associate = wpa_driver_nl80211_associate,
2090         .set_auth_alg = wpa_driver_nl80211_set_auth_alg,
2091         .init = wpa_driver_nl80211_init,
2092         .deinit = wpa_driver_nl80211_deinit,
2093         .add_pmkid = wpa_driver_nl80211_add_pmkid,
2094         .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
2095         .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
2096         .get_capa = wpa_driver_nl80211_get_capa,
2097         .set_operstate = wpa_driver_nl80211_set_operstate,
2098 };