vcs.maemo.org Git - wpasupplicant/blob - 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 "nl80211_copy.h"
  22 #ifdef CONFIG_CLIENT_MLME
  23 #include <netpacket/packet.h>
  24 #include <linux/if_ether.h>
  25 #include "radiotap.h"
  26 #include "radiotap_iter.h"
  27 #endif /* CONFIG_CLIENT_MLME */
  28
  29 #include "wireless_copy.h"
  30 #include "common.h"
  31 #include "driver.h"
  32 #include "eloop.h"
  33 #include "ieee802_11_defs.h"
  34
  35 #ifndef IFF_LOWER_UP
  36 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  37 #endif
  38 #ifndef IFF_DORMANT
  39 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  40 #endif
  41
  42 #ifndef IF_OPER_DORMANT
  43 #define IF_OPER_DORMANT 5
  44 #endif
  45 #ifndef IF_OPER_UP
  46 #define IF_OPER_UP 6
  47 #endif
  48
  49
  50 struct wpa_driver_nl80211_data {
  51         void *ctx;
  52         int event_sock;
  53         int ioctl_sock;
  54         char ifname[IFNAMSIZ + 1];
  55         int ifindex;
  56         int if_removed;
  57         u8 *assoc_req_ies;
  58         size_t assoc_req_ies_len;
  59         u8 *assoc_resp_ies;
  60         size_t assoc_resp_ies_len;
  61         struct wpa_driver_capa capa;
  62         int has_capability;
  63         int we_version_compiled;
  64
  65         /* for set_auth_alg fallback */
  66         int use_crypt;
  67         int auth_alg_fallback;
  68
  69         int operstate;
  70
  71         char mlmedev[IFNAMSIZ + 1];
  72
  73         int scan_complete_events;
  74
  75         struct nl_handle *nl_handle;
  76         struct nl_cache *nl_cache;
  77         struct nl_cb *nl_cb;
  78         struct genl_family *nl80211;
  79
  80 #ifdef CONFIG_CLIENT_MLME
  81         int monitor_sock; /* socket for monitor */
  82         int monitor_ifidx;
  83 #endif /* CONFIG_CLIENT_MLME */
  84 };
  85
  86
  87 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
  88                                             void *timeout_ctx);
  89 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
  90 static int wpa_driver_nl80211_flush_pmkid(void *priv);
  91 static int wpa_driver_nl80211_get_range(void *priv);
  92 static void
  93 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
  94
  95
  96 /* nl80211 code */
  97 static int ack_handler(struct nl_msg *msg, void *arg)
  98 {
  99         int *err = arg;
 100         *err = 0;
 101         return NL_STOP;
 102 }
 103
 104 static int finish_handler(struct nl_msg *msg, void *arg)
 105 {
 106         int *ret = arg;
 107         *ret = 0;
 108         return NL_SKIP;
 109 }
 110
 111 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 112                          void *arg)
 113 {
 114         int *ret = arg;
 115         *ret = err->error;
 116         return NL_SKIP;
 117 }
 118
 119 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 120                               struct nl_msg *msg,
 121                               int (*valid_handler)(struct nl_msg *, void *),
 122                               void *valid_data)
 123 {
 124         struct nl_cb *cb;
 125         int err = -ENOMEM;
 126
 127         cb = nl_cb_clone(drv->nl_cb);
 128         if (!cb)
 129                 goto out;
 130
 131         err = nl_send_auto_complete(drv->nl_handle, msg);
 132         if (err < 0)
 133                 goto out;
 134
 135         err = 1;
 136
 137         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 138         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 139         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 140
 141         if (valid_handler)
 142                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 143                           valid_handler, valid_data);
 144
 145         while (err > 0)
 146                 nl_recvmsgs(drv->nl_handle, cb);
 147  out:
 148         nl_cb_put(cb);
 149         nlmsg_free(msg);
 150         return err;
 151 }
 152
 153
 154 static int wpa_driver_nl80211_send_oper_ifla(
 155         struct wpa_driver_nl80211_data *drv,
 156         int linkmode, int operstate)
 157 {
 158         struct {
 159                 struct nlmsghdr hdr;
 160                 struct ifinfomsg ifinfo;
 161                 char opts[16];
 162         } req;
 163         struct rtattr *rta;
 164         static int nl_seq;
 165         ssize_t ret;
 166
 167         os_memset(&req, 0, sizeof(req));
 168
 169         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 170         req.hdr.nlmsg_type = RTM_SETLINK;
 171         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 172         req.hdr.nlmsg_seq = ++nl_seq;
 173         req.hdr.nlmsg_pid = 0;
 174
 175         req.ifinfo.ifi_family = AF_UNSPEC;
 176         req.ifinfo.ifi_type = 0;
 177         req.ifinfo.ifi_index = drv->ifindex;
 178         req.ifinfo.ifi_flags = 0;
 179         req.ifinfo.ifi_change = 0;
 180
 181         if (linkmode != -1) {
 182                 rta = (struct rtattr *)
 183                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 184                 rta->rta_type = IFLA_LINKMODE;
 185                 rta->rta_len = RTA_LENGTH(sizeof(char));
 186                 *((char *) RTA_DATA(rta)) = linkmode;
 187                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 188                         RTA_LENGTH(sizeof(char));
 189         }
 190         if (operstate != -1) {
 191                 rta = (struct rtattr *)
 192                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 193                 rta->rta_type = IFLA_OPERSTATE;
 194                 rta->rta_len = RTA_LENGTH(sizeof(char));
 195                 *((char *) RTA_DATA(rta)) = operstate;
 196                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 197                         RTA_LENGTH(sizeof(char));
 198         }
 199
 200         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 201                    linkmode, operstate);
 202
 203         ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
 204         if (ret < 0) {
 205                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 206                            "%s (assume operstate is not supported)",
 207                            strerror(errno));
 208         }
 209
 210         return ret < 0 ? -1 : 0;
 211 }
 212
 213
 214 static int wpa_driver_nl80211_set_auth_param(
 215         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 216 {
 217         struct iwreq iwr;
 218         int ret = 0;
 219
 220         os_memset(&iwr, 0, sizeof(iwr));
 221         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 222         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 223         iwr.u.param.value = value;
 224
 225         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 226                 if (errno != EOPNOTSUPP) {
 227                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 228                                    "value 0x%x) failed: %s)",
 229                                    idx, value, strerror(errno));
 230                 }
 231                 ret = errno == EOPNOTSUPP ? -2 : -1;
 232         }
 233
 234         return ret;
 235 }
 236
 237
 238 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 239 {
 240         struct wpa_driver_nl80211_data *drv = priv;
 241         struct iwreq iwr;
 242         int ret = 0;
 243
 244         os_memset(&iwr, 0, sizeof(iwr));
 245         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 246
 247         if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
 248                 perror("ioctl[SIOCGIWAP]");
 249                 ret = -1;
 250         }
 251         os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
 252
 253         return ret;
 254 }
 255
 256
 257 static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
 258 {
 259         struct wpa_driver_nl80211_data *drv = priv;
 260         struct iwreq iwr;
 261         int ret = 0;
 262
 263         os_memset(&iwr, 0, sizeof(iwr));
 264         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 265         iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
 266         if (bssid)
 267                 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
 268         else
 269                 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
 270
 271         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
 272                 perror("ioctl[SIOCSIWAP]");
 273                 ret = -1;
 274         }
 275
 276         return ret;
 277 }
 278
 279
 280 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 281 {
 282         struct wpa_driver_nl80211_data *drv = priv;
 283         struct iwreq iwr;
 284         int ret = 0;
 285
 286         os_memset(&iwr, 0, sizeof(iwr));
 287         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 288         iwr.u.essid.pointer = (caddr_t) ssid;
 289         iwr.u.essid.length = 32;
 290
 291         if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
 292                 perror("ioctl[SIOCGIWESSID]");
 293                 ret = -1;
 294         } else {
 295                 ret = iwr.u.essid.length;
 296                 if (ret > 32)
 297                         ret = 32;
 298                 /* Some drivers include nul termination in the SSID, so let's
 299                  * remove it here before further processing. WE-21 changes this
 300                  * to explicitly require the length _not_ to include nul
 301                  * termination. */
 302                 if (ret > 0 && ssid[ret - 1] == '\0' &&
 303                     drv->we_version_compiled < 21)
 304                         ret--;
 305         }
 306
 307         return ret;
 308 }
 309
 310
 311 static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
 312                                        size_t ssid_len)
 313 {
 314         struct wpa_driver_nl80211_data *drv = priv;
 315         struct iwreq iwr;
 316         int ret = 0;
 317         char buf[33];
 318
 319         if (ssid_len > 32)
 320                 return -1;
 321
 322         os_memset(&iwr, 0, sizeof(iwr));
 323         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 324         /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
 325         iwr.u.essid.flags = (ssid_len != 0);
 326         os_memset(buf, 0, sizeof(buf));
 327         os_memcpy(buf, ssid, ssid_len);
 328         iwr.u.essid.pointer = (caddr_t) buf;
 329         if (drv->we_version_compiled < 21) {
 330                 /* For historic reasons, set SSID length to include one extra
 331                  * character, C string nul termination, even though SSID is
 332                  * really an octet string that should not be presented as a C
 333                  * string. Some Linux drivers decrement the length by one and
 334                  * can thus end up missing the last octet of the SSID if the
 335                  * length is not incremented here. WE-21 changes this to
 336                  * explicitly require the length _not_ to include nul
 337                  * termination. */
 338                 if (ssid_len)
 339                         ssid_len++;
 340         }
 341         iwr.u.essid.length = ssid_len;
 342
 343         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 344                 perror("ioctl[SIOCSIWESSID]");
 345                 ret = -1;
 346         }
 347
 348         return ret;
 349 }
 350
 351
 352 static int wpa_driver_nl80211_set_freq(void *priv, int freq)
 353 {
 354         struct wpa_driver_nl80211_data *drv = priv;
 355         struct iwreq iwr;
 356         int ret = 0;
 357
 358         os_memset(&iwr, 0, sizeof(iwr));
 359         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 360         iwr.u.freq.m = freq * 100000;
 361         iwr.u.freq.e = 1;
 362
 363         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 364                 perror("ioctl[SIOCSIWFREQ]");
 365                 ret = -1;
 366         }
 367
 368         return ret;
 369 }
 370
 371
 372 static void
 373 wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
 374 {
 375         union wpa_event_data data;
 376
 377         wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
 378                    custom);
 379
 380         os_memset(&data, 0, sizeof(data));
 381         /* Host AP driver */
 382         if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
 383                 data.michael_mic_failure.unicast =
 384                         os_strstr(custom, " unicast ") != NULL;
 385                 /* TODO: parse parameters(?) */
 386                 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 387         } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
 388                 char *spos;
 389                 int bytes;
 390
 391                 spos = custom + 17;
 392
 393                 bytes = strspn(spos, "0123456789abcdefABCDEF");
 394                 if (!bytes || (bytes & 1))
 395                         return;
 396                 bytes /= 2;
 397
 398                 data.assoc_info.req_ies = os_malloc(bytes);
 399                 if (data.assoc_info.req_ies == NULL)
 400                         return;
 401
 402                 data.assoc_info.req_ies_len = bytes;
 403                 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
 404
 405                 spos += bytes * 2;
 406
 407                 data.assoc_info.resp_ies = NULL;
 408                 data.assoc_info.resp_ies_len = 0;
 409
 410                 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
 411                         spos += 9;
 412
 413                         bytes = strspn(spos, "0123456789abcdefABCDEF");
 414                         if (!bytes || (bytes & 1))
 415                                 goto done;
 416                         bytes /= 2;
 417
 418                         data.assoc_info.resp_ies = os_malloc(bytes);
 419                         if (data.assoc_info.resp_ies == NULL)
 420                                 goto done;
 421
 422                         data.assoc_info.resp_ies_len = bytes;
 423                         hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
 424                 }
 425
 426                 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
 427
 428         done:
 429                 os_free(data.assoc_info.resp_ies);
 430                 os_free(data.assoc_info.req_ies);
 431 #ifdef CONFIG_PEERKEY
 432         } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
 433                 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
 434                         wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
 435                                    "STKSTART.request '%s'", custom + 17);
 436                         return;
 437                 }
 438                 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
 439 #endif /* CONFIG_PEERKEY */
 440         }
 441 }
 442
 443
 444 static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
 445         void *ctx, const char *ev, size_t len)
 446 {
 447         const struct iw_michaelmicfailure *mic;
 448         union wpa_event_data data;
 449
 450         if (len < sizeof(*mic))
 451                 return -1;
 452
 453         mic = (const struct iw_michaelmicfailure *) ev;
 454
 455         wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
 456                    "flags=0x%x src_addr=" MACSTR, mic->flags,
 457                    MAC2STR(mic->src_addr.sa_data));
 458
 459         os_memset(&data, 0, sizeof(data));
 460         data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
 461         wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 462
 463         return 0;
 464 }
 465
 466
 467 static int wpa_driver_nl80211_event_wireless_pmkidcand(
 468         struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
 469 {
 470         const struct iw_pmkid_cand *cand;
 471         union wpa_event_data data;
 472         const u8 *addr;
 473
 474         if (len < sizeof(*cand))
 475                 return -1;
 476
 477         cand = (const struct iw_pmkid_cand *) ev;
 478         addr = (const u8 *) cand->bssid.sa_data;
 479
 480         wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
 481                    "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
 482                    cand->index, MAC2STR(addr));
 483
 484         os_memset(&data, 0, sizeof(data));
 485         os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
 486         data.pmkid_candidate.index = cand->index;
 487         data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
 488         wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
 489
 490         return 0;
 491 }
 492
 493
 494 static int wpa_driver_nl80211_event_wireless_assocreqie(
 495         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 496 {
 497         if (len < 0)
 498                 return -1;
 499
 500         wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
 501                     len);
 502         os_free(drv->assoc_req_ies);
 503         drv->assoc_req_ies = os_malloc(len);
 504         if (drv->assoc_req_ies == NULL) {
 505                 drv->assoc_req_ies_len = 0;
 506                 return -1;
 507         }
 508         os_memcpy(drv->assoc_req_ies, ev, len);
 509         drv->assoc_req_ies_len = len;
 510
 511         return 0;
 512 }
 513
 514
 515 static int wpa_driver_nl80211_event_wireless_assocrespie(
 516         struct wpa_driver_nl80211_data *drv, const char *ev, int len)
 517 {
 518         if (len < 0)
 519                 return -1;
 520
 521         wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
 522                     len);
 523         os_free(drv->assoc_resp_ies);
 524         drv->assoc_resp_ies = os_malloc(len);
 525         if (drv->assoc_resp_ies == NULL) {
 526                 drv->assoc_resp_ies_len = 0;
 527                 return -1;
 528         }
 529         os_memcpy(drv->assoc_resp_ies, ev, len);
 530         drv->assoc_resp_ies_len = len;
 531
 532         return 0;
 533 }
 534
 535
 536 static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
 537 {
 538         union wpa_event_data data;
 539
 540         if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
 541                 return;
 542
 543         os_memset(&data, 0, sizeof(data));
 544         if (drv->assoc_req_ies) {
 545                 data.assoc_info.req_ies = drv->assoc_req_ies;
 546                 drv->assoc_req_ies = NULL;
 547                 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
 548         }
 549         if (drv->assoc_resp_ies) {
 550                 data.assoc_info.resp_ies = drv->assoc_resp_ies;
 551                 drv->assoc_resp_ies = NULL;
 552                 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
 553         }
 554
 555         wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
 556
 557         os_free(data.assoc_info.req_ies);
 558         os_free(data.assoc_info.resp_ies);
 559 }
 560
 561
 562 static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
 563                                            void *ctx, char *data, int len)
 564 {
 565         struct iw_event iwe_buf, *iwe = &iwe_buf;
 566         char *pos, *end, *custom, *buf;
 567
 568         pos = data;
 569         end = data + len;
 570
 571         while (pos + IW_EV_LCP_LEN <= end) {
 572                 /* Event data may be unaligned, so make a local, aligned copy
 573                  * before processing. */
 574                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
 575                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
 576                            iwe->cmd, iwe->len);
 577                 if (iwe->len <= IW_EV_LCP_LEN)
 578                         return;
 579
 580                 custom = pos + IW_EV_POINT_LEN;
 581                 if (drv->we_version_compiled > 18 &&
 582                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
 583                      iwe->cmd == IWEVCUSTOM ||
 584                      iwe->cmd == IWEVASSOCREQIE ||
 585                      iwe->cmd == IWEVASSOCRESPIE ||
 586                      iwe->cmd == IWEVPMKIDCAND)) {
 587                         /* WE-19 removed the pointer from struct iw_point */
 588                         char *dpos = (char *) &iwe_buf.u.data.length;
 589                         int dlen = dpos - (char *) &iwe_buf;
 590                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
 591                                   sizeof(struct iw_event) - dlen);
 592                 } else {
 593                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
 594                         custom += IW_EV_POINT_OFF;
 595                 }
 596
 597                 switch (iwe->cmd) {
 598                 case SIOCGIWAP:
 599                         wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
 600                                    MACSTR,
 601                                    MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
 602                         if (is_zero_ether_addr(
 603                                     (const u8 *) iwe->u.ap_addr.sa_data) ||
 604                             os_memcmp(iwe->u.ap_addr.sa_data,
 605                                       "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
 606                             0) {
 607                                 os_free(drv->assoc_req_ies);
 608                                 drv->assoc_req_ies = NULL;
 609                                 os_free(drv->assoc_resp_ies);
 610                                 drv->assoc_resp_ies = NULL;
 611                                 wpa_supplicant_event(ctx, EVENT_DISASSOC,
 612                                                      NULL);
 613
 614                         } else {
 615                                 wpa_driver_nl80211_event_assoc_ies(drv);
 616                                 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
 617                         }
 618                         break;
 619                 case IWEVMICHAELMICFAILURE:
 620                         wpa_driver_nl80211_event_wireless_michaelmicfailure(
 621                                 ctx, custom, iwe->u.data.length);
 622                         break;
 623                 case IWEVCUSTOM:
 624                         if (custom + iwe->u.data.length > end)
 625                                 return;
 626                         buf = os_malloc(iwe->u.data.length + 1);
 627                         if (buf == NULL)
 628                                 return;
 629                         os_memcpy(buf, custom, iwe->u.data.length);
 630                         buf[iwe->u.data.length] = '\0';
 631                         wpa_driver_nl80211_event_wireless_custom(ctx, buf);
 632                         os_free(buf);
 633                         break;
 634                 case SIOCGIWSCAN:
 635                         drv->scan_complete_events = 1;
 636                         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout,
 637                                              drv, ctx);
 638                         wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
 639                         break;
 640                 case IWEVASSOCREQIE:
 641                         wpa_driver_nl80211_event_wireless_assocreqie(
 642                                 drv, custom, iwe->u.data.length);
 643                         break;
 644                 case IWEVASSOCRESPIE:
 645                         wpa_driver_nl80211_event_wireless_assocrespie(
 646                                 drv, custom, iwe->u.data.length);
 647                         break;
 648                 case IWEVPMKIDCAND:
 649                         wpa_driver_nl80211_event_wireless_pmkidcand(
 650                                 drv, custom, iwe->u.data.length);
 651                         break;
 652                 }
 653
 654                 pos += iwe->len;
 655         }
 656 }
 657
 658
 659 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 660                                           void *ctx, char *buf, size_t len,
 661                                           int del)
 662 {
 663         union wpa_event_data event;
 664
 665         os_memset(&event, 0, sizeof(event));
 666         if (len > sizeof(event.interface_status.ifname))
 667                 len = sizeof(event.interface_status.ifname) - 1;
 668         os_memcpy(event.interface_status.ifname, buf, len);
 669         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 670                 EVENT_INTERFACE_ADDED;
 671
 672         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 673                    del ? "DEL" : "NEW",
 674                    event.interface_status.ifname,
 675                    del ? "removed" : "added");
 676
 677         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 678                 if (del)
 679                         drv->if_removed = 1;
 680                 else
 681                         drv->if_removed = 0;
 682         }
 683
 684         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 685 }
 686
 687
 688 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 689                                          struct nlmsghdr *h)
 690 {
 691         struct ifinfomsg *ifi;
 692         int attrlen, _nlmsg_len, rta_len;
 693         struct rtattr *attr;
 694
 695         ifi = NLMSG_DATA(h);
 696
 697         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 698
 699         attrlen = h->nlmsg_len - _nlmsg_len;
 700         if (attrlen < 0)
 701                 return 0;
 702
 703         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 704
 705         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 706         while (RTA_OK(attr, attrlen)) {
 707                 if (attr->rta_type == IFLA_IFNAME) {
 708                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 709                             == 0)
 710                                 return 1;
 711                         else
 712                                 break;
 713                 }
 714                 attr = RTA_NEXT(attr, attrlen);
 715         }
 716
 717         return 0;
 718 }
 719
 720
 721 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 722                                           int ifindex, struct nlmsghdr *h)
 723 {
 724         if (drv->ifindex == ifindex)
 725                 return 1;
 726
 727         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 728                 drv->ifindex = if_nametoindex(drv->ifname);
 729                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 730                            "interface");
 731                 wpa_driver_nl80211_finish_drv_init(drv);
 732                 return 1;
 733         }
 734
 735         return 0;
 736 }
 737
 738
 739 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 740                                               void *ctx, struct nlmsghdr *h,
 741                                               size_t len)
 742 {
 743         struct ifinfomsg *ifi;
 744         int attrlen, _nlmsg_len, rta_len;
 745         struct rtattr * attr;
 746
 747         if (len < sizeof(*ifi))
 748                 return;
 749
 750         ifi = NLMSG_DATA(h);
 751
 752         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 753                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 754                            ifi->ifi_index);
 755                 return;
 756         }
 757
 758         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 759                    "(%s%s%s%s)",
 760                    drv->operstate, ifi->ifi_flags,
 761                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 762                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 763                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 764                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 765         /*
 766          * Some drivers send the association event before the operup event--in
 767          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 768          * fails. This will hit us when wpa_supplicant does not need to do
 769          * IEEE 802.1X authentication
 770          */
 771         if (drv->operstate == 1 &&
 772             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 773             !(ifi->ifi_flags & IFF_RUNNING))
 774                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 775
 776         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 777
 778         attrlen = h->nlmsg_len - _nlmsg_len;
 779         if (attrlen < 0)
 780                 return;
 781
 782         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 783
 784         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 785         while (RTA_OK(attr, attrlen)) {
 786                 if (attr->rta_type == IFLA_WIRELESS) {
 787                         wpa_driver_nl80211_event_wireless(
 788                                 drv, ctx, ((char *) attr) + rta_len,
 789                                 attr->rta_len - rta_len);
 790                 } else if (attr->rta_type == IFLA_IFNAME) {
 791                         wpa_driver_nl80211_event_link(
 792                                 drv, ctx,
 793                                 ((char *) attr) + rta_len,
 794                                 attr->rta_len - rta_len, 0);
 795                 }
 796                 attr = RTA_NEXT(attr, attrlen);
 797         }
 798 }
 799
 800
 801 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 802                                               void *ctx, struct nlmsghdr *h,
 803                                               size_t len)
 804 {
 805         struct ifinfomsg *ifi;
 806         int attrlen, _nlmsg_len, rta_len;
 807         struct rtattr * attr;
 808
 809         if (len < sizeof(*ifi))
 810                 return;
 811
 812         ifi = NLMSG_DATA(h);
 813
 814         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 815
 816         attrlen = h->nlmsg_len - _nlmsg_len;
 817         if (attrlen < 0)
 818                 return;
 819
 820         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 821
 822         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 823         while (RTA_OK(attr, attrlen)) {
 824                 if (attr->rta_type == IFLA_IFNAME) {
 825                         wpa_driver_nl80211_event_link(
 826                                 drv, ctx,
 827                                 ((char *) attr) + rta_len,
 828                                 attr->rta_len - rta_len, 1);
 829                 }
 830                 attr = RTA_NEXT(attr, attrlen);
 831         }
 832 }
 833
 834
 835 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 836                                           void *sock_ctx)
 837 {
 838         char buf[8192];
 839         int left;
 840         struct sockaddr_nl from;
 841         socklen_t fromlen;
 842         struct nlmsghdr *h;
 843         int max_events = 10;
 844
 845 try_again:
 846         fromlen = sizeof(from);
 847         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 848                         (struct sockaddr *) &from, &fromlen);
 849         if (left < 0) {
 850                 if (errno != EINTR && errno != EAGAIN)
 851                         perror("recvfrom(netlink)");
 852                 return;
 853         }
 854
 855         h = (struct nlmsghdr *) buf;
 856         while (left >= (int) sizeof(*h)) {
 857                 int len, plen;
 858
 859                 len = h->nlmsg_len;
 860                 plen = len - sizeof(*h);
 861                 if (len > left || plen < 0) {
 862                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 863                                    "len=%d left=%d plen=%d",
 864                                    len, left, plen);
 865                         break;
 866                 }
 867
 868                 switch (h->nlmsg_type) {
 869                 case RTM_NEWLINK:
 870                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 871                                                           h, plen);
 872                         break;
 873                 case RTM_DELLINK:
 874                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 875                                                           h, plen);
 876                         break;
 877                 }
 878
 879                 len = NLMSG_ALIGN(len);
 880                 left -= len;
 881                 h = (struct nlmsghdr *) ((char *) h + len);
 882         }
 883
 884         if (left > 0) {
 885                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 886                            "message", left);
 887         }
 888
 889         if (--max_events > 0) {
 890                 /*
 891                  * Try to receive all events in one eloop call in order to
 892                  * limit race condition on cases where AssocInfo event, Assoc
 893                  * event, and EAPOL frames are received more or less at the
 894                  * same time. We want to process the event messages first
 895                  * before starting EAPOL processing.
 896                  */
 897                 goto try_again;
 898         }
 899 }
 900
 901
 902 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
 903                                               const char *ifname, int *flags)
 904 {
 905         struct ifreq ifr;
 906
 907         os_memset(&ifr, 0, sizeof(ifr));
 908         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 909         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 910                 perror("ioctl[SIOCGIFFLAGS]");
 911                 return -1;
 912         }
 913         *flags = ifr.ifr_flags & 0xffff;
 914         return 0;
 915 }
 916
 917
 918 /**
 919  * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 920  * @drv: driver_nl80211 private data
 921  * @flags: Pointer to returned flags value
 922  * Returns: 0 on success, -1 on failure
 923  */
 924 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
 925                                           int *flags)
 926 {
 927         return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
 928 }
 929
 930
 931 static int wpa_driver_nl80211_set_ifflags_ifname(
 932         struct wpa_driver_nl80211_data *drv,
 933         const char *ifname, int flags)
 934 {
 935         struct ifreq ifr;
 936
 937         os_memset(&ifr, 0, sizeof(ifr));
 938         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 939         ifr.ifr_flags = flags & 0xffff;
 940         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 941                 perror("SIOCSIFFLAGS");
 942                 return -1;
 943         }
 944         return 0;
 945 }
 946
 947
 948 /**
 949  * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 950  * @drv: driver_nl80211 private data
 951  * @flags: New value for flags
 952  * Returns: 0 on success, -1 on failure
 953  */
 954 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
 955                                           int flags)
 956 {
 957         return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
 958 }
 959
 960
 961 /**
 962  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 963  * @priv: driver_nl80211 private data
 964  * @alpha2_arg: country to which to switch to
 965  * Returns: 0 on success, -1 on failure
 966  *
 967  * This asks nl80211 to set the regulatory domain for given
 968  * country ISO / IEC alpha2.
 969  */
 970 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 971 {
 972         struct wpa_driver_nl80211_data *drv = priv;
 973         char alpha2[3];
 974         struct nl_msg *msg;
 975
 976         msg = nlmsg_alloc();
 977         if (!msg)
 978                 goto nla_put_failure;
 979
 980         alpha2[0] = alpha2_arg[0];
 981         alpha2[1] = alpha2_arg[1];
 982         alpha2[2] = '\0';
 983
 984         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 985                     0, NL80211_CMD_REQ_SET_REG, 0);
 986
 987         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 988         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 989                 return -EINVAL;
 990         return 0;
 991 nla_put_failure:
 992         return -EINVAL;
 993 }
 994
 995
 996 static int wpa_driver_nl80211_set_probe_req_ie(void *priv, const u8 *ies,
 997                                                size_t ies_len)
 998 {
 999         struct wpa_driver_nl80211_data *drv = priv;
1000         struct nl_msg *msg;
1001         int ret = -1;
1002
1003         msg = nlmsg_alloc();
1004         if (!msg)
1005                 return -ENOMEM;
1006
1007         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1008                     NL80211_CMD_SET_MGMT_EXTRA_IE, 0);
1009
1010         NLA_PUT_U8(msg, NL80211_ATTR_MGMT_SUBTYPE, 4 /* ProbeReq */);
1011         if (ies)
1012                 NLA_PUT(msg, NL80211_ATTR_IE, ies_len, ies);
1013
1014         ret = 0;
1015
1016         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1017
1018         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1019         return ret;
1020
1021 nla_put_failure:
1022         return -ENOBUFS;
1023 }
1024
1025
1026 #ifdef CONFIG_CLIENT_MLME
1027
1028 static int nl80211_set_vif(struct wpa_driver_nl80211_data *drv,
1029                            int drop_unencrypted, int userspace_mlme)
1030 {
1031 #ifdef NL80211_CMD_SET_VIF
1032         struct nl_msg *msg;
1033         int ret = -1;
1034
1035         msg = nlmsg_alloc();
1036         if (!msg)
1037                 return -ENOMEM;
1038
1039         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1040                     NL80211_CMD_SET_VIF, 0);
1041
1042         if (drop_unencrypted >= 0)
1043                 NLA_PUT_U8(msg, NL80211_ATTR_VIF_DROP_UNENCRYPTED,
1044                            drop_unencrypted);
1045         if (userspace_mlme >= 0)
1046                 NLA_PUT_U8(msg, NL80211_ATTR_VIF_USERSPACE_MLME,
1047                            userspace_mlme);
1048
1049         ret = 0;
1050
1051         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1052
1053         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1054         return ret;
1055
1056 nla_put_failure:
1057         return -ENOBUFS;
1058 #else /* NL80211_CMD_SET_VIF */
1059         return -1;
1060 #endif /* NL80211_CMD_SET_VIF */
1061 }
1062
1063
1064 static int wpa_driver_nl80211_set_userspace_mlme(
1065         struct wpa_driver_nl80211_data *drv, int enabled)
1066 {
1067         return nl80211_set_vif(drv, -1, enabled);
1068 }
1069
1070
1071 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
1072                                  int ifidx)
1073 {
1074         struct nl_msg *msg;
1075
1076         msg = nlmsg_alloc();
1077         if (!msg)
1078                 goto nla_put_failure;
1079
1080         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1081                     0, NL80211_CMD_DEL_INTERFACE, 0);
1082         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
1083         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
1084                 return;
1085 nla_put_failure:
1086         wpa_printf(MSG_ERROR, "nl80211: Failed to remove interface.");
1087 }
1088
1089
1090 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
1091                                 const char *ifname, enum nl80211_iftype iftype)
1092 {
1093         struct nl_msg *msg, *flags = NULL;
1094         int ifidx, err;
1095         int ret = -ENOBUFS;
1096
1097         msg = nlmsg_alloc();
1098         if (!msg)
1099                 return -1;
1100
1101         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1102                     0, NL80211_CMD_NEW_INTERFACE, 0);
1103         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
1104         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
1105         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
1106
1107         if (iftype == NL80211_IFTYPE_MONITOR) {
1108                 flags = nlmsg_alloc();
1109                 if (!flags)
1110                         goto nla_put_failure;
1111
1112                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
1113
1114                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1115
1116                 nlmsg_free(flags);
1117
1118                 if (err)
1119                         goto nla_put_failure;
1120         }
1121
1122         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1123         if (ret) {
1124         nla_put_failure:
1125                 wpa_printf(MSG_ERROR, "nl80211: Failed to create interface %d",
1126                            ret);
1127                 return ret;
1128         }
1129
1130         ifidx = if_nametoindex(ifname);
1131         if (ifidx <= 0)
1132                 return -1;
1133
1134         return ifidx;
1135 }
1136
1137
1138 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1139 {
1140         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1141         int len;
1142         unsigned char buf[3000];
1143         struct ieee80211_radiotap_iterator iter;
1144         int ret;
1145         int injected = 0, failed = 0, rxflags = 0;
1146         struct ieee80211_rx_status rx_status;
1147
1148         len = recv(sock, buf, sizeof(buf), 0);
1149         if (len < 0) {
1150                 perror("recv");
1151                 return;
1152         }
1153
1154         if (ieee80211_radiotap_iterator_init(&iter, (void *) buf, len)) {
1155                 wpa_printf(MSG_DEBUG, "nl80211: received invalid radiotap "
1156                            "frame");
1157                 return;
1158         }
1159
1160         os_memset(&rx_status, 0, sizeof(rx_status));
1161
1162         while (1) {
1163                 ret = ieee80211_radiotap_iterator_next(&iter);
1164                 if (ret == -ENOENT)
1165                         break;
1166                 if (ret) {
1167                         wpa_printf(MSG_DEBUG, "nl80211: received invalid "
1168                                    "radiotap frame (%d)", ret);
1169                         return;
1170                 }
1171                 switch (iter.this_arg_index) {
1172                 case IEEE80211_RADIOTAP_FLAGS:
1173                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1174                                 len -= 4;
1175                         break;
1176                 case IEEE80211_RADIOTAP_RX_FLAGS:
1177                         rxflags = 1;
1178                         break;
1179                 case IEEE80211_RADIOTAP_TX_FLAGS:
1180                         injected = 1;
1181                         failed = le_to_host16((*(u16 *) iter.this_arg)) &
1182                                 IEEE80211_RADIOTAP_F_TX_FAIL;
1183                         break;
1184                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1185                         break;
1186                 case IEEE80211_RADIOTAP_CHANNEL:
1187                         /* TODO convert from freq/flags to channel number
1188                          * rx_status.channel = XXX;
1189                         */
1190                         break;
1191                 case IEEE80211_RADIOTAP_RATE:
1192                         break;
1193                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1194                         rx_status.ssi = *iter.this_arg;
1195                         break;
1196                 }
1197         }
1198
1199         if (rxflags && injected)
1200                 return;
1201
1202         if (!injected) {
1203                 wpa_supplicant_sta_rx(drv->ctx, buf + iter.max_length,
1204                                       len - iter.max_length, &rx_status);
1205         } else if (failed) {
1206                 /* TX failure callback */
1207         } else {
1208                 /* TX success (ACK) callback */
1209         }
1210 }
1211
1212
1213 static int wpa_driver_nl80211_create_monitor_interface(
1214         struct wpa_driver_nl80211_data *drv)
1215 {
1216         char buf[IFNAMSIZ];
1217         struct sockaddr_ll ll;
1218         int optval, flags;
1219         socklen_t optlen;
1220
1221         os_snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
1222         buf[IFNAMSIZ - 1] = '\0';
1223
1224         drv->monitor_ifidx =
1225                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);
1226
1227         if (drv->monitor_ifidx < 0)
1228                 return -1;
1229
1230         if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0 ||
1231             wpa_driver_nl80211_set_ifflags_ifname(drv, buf, flags | IFF_UP) !=
1232             0) {
1233                 wpa_printf(MSG_ERROR, "nl80211: Could not set interface '%s' "
1234                            "UP", buf);
1235                 goto error;
1236         }
1237
1238         os_memset(&ll, 0, sizeof(ll));
1239         ll.sll_family = AF_PACKET;
1240         ll.sll_ifindex = drv->monitor_ifidx;
1241         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1242         if (drv->monitor_sock < 0) {
1243                 perror("socket[PF_PACKET,SOCK_RAW]");
1244                 goto error;
1245         }
1246
1247         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1248                  sizeof(ll)) < 0) {
1249                 perror("monitor socket bind");
1250                 goto error;
1251         }
1252
1253         optlen = sizeof(optval);
1254         optval = 20;
1255         if (setsockopt
1256             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1257                 perror("Failed to set socket priority");
1258                 goto error;
1259         }
1260
1261         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1262                                      drv, NULL)) {
1263                 wpa_printf(MSG_ERROR, "nl80211: Could not register monitor "
1264                            "read socket");
1265                 goto error;
1266         }
1267
1268         return 0;
1269
1270  error:
1271         nl80211_remove_iface(drv, drv->monitor_ifidx);
1272         return -1;
1273 }
1274
1275 #endif /* CONFIG_CLIENT_MLME */
1276
1277
1278 /**
1279  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1280  * @ctx: context to be used when calling wpa_supplicant functions,
1281  * e.g., wpa_supplicant_event()
1282  * @ifname: interface name, e.g., wlan0
1283  * Returns: Pointer to private data, %NULL on failure
1284  */
1285 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1286 {
1287         int s;
1288         struct sockaddr_nl local;
1289         struct wpa_driver_nl80211_data *drv;
1290
1291         drv = os_zalloc(sizeof(*drv));
1292         if (drv == NULL)
1293                 return NULL;
1294         drv->ctx = ctx;
1295         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1296
1297         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1298         if (drv->nl_cb == NULL) {
1299                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1300                            "callbacks");
1301                 goto err1;
1302         }
1303
1304         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1305         if (drv->nl_handle == NULL) {
1306                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1307                            "callbacks");
1308                 goto err2;
1309         }
1310
1311         if (genl_connect(drv->nl_handle)) {
1312                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1313                            "netlink");
1314                 goto err3;
1315         }
1316
1317         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1318         if (drv->nl_cache == NULL) {
1319                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1320                            "netlink cache");
1321                 goto err3;
1322         }
1323
1324         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1325         if (drv->nl80211 == NULL) {
1326                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1327                            "found");
1328                 goto err4;
1329         }
1330
1331         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1332         if (drv->ioctl_sock < 0) {
1333                 perror("socket(PF_INET,SOCK_DGRAM)");
1334                 goto err5;
1335         }
1336
1337         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1338         if (s < 0) {
1339                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1340                 goto err6;
1341         }
1342
1343         os_memset(&local, 0, sizeof(local));
1344         local.nl_family = AF_NETLINK;
1345         local.nl_groups = RTMGRP_LINK;
1346         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1347                 perror("bind(netlink)");
1348                 close(s);
1349                 goto err6;
1350         }
1351
1352         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive, drv,
1353                                  ctx);
1354         drv->event_sock = s;
1355
1356         wpa_driver_nl80211_finish_drv_init(drv);
1357
1358         return drv;
1359
1360 err6:
1361         close(drv->ioctl_sock);
1362 err5:
1363         genl_family_put(drv->nl80211);
1364 err4:
1365         nl_cache_free(drv->nl_cache);
1366 err3:
1367         nl_handle_destroy(drv->nl_handle);
1368 err2:
1369         nl_cb_put(drv->nl_cb);
1370 err1:
1371         os_free(drv);
1372         return NULL;
1373 }
1374
1375
1376 static void
1377 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1378 {
1379         int flags;
1380
1381         if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0)
1382                 printf("Could not get interface '%s' flags\n", drv->ifname);
1383         else if (!(flags & IFF_UP)) {
1384                 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1385                         printf("Could not set interface '%s' UP\n",
1386                                drv->ifname);
1387                 } else {
1388                         /*
1389                          * Wait some time to allow driver to initialize before
1390                          * starting configuring the driver. This seems to be
1391                          * needed at least some drivers that load firmware etc.
1392                          * when the interface is set up.
1393                          */
1394                         wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
1395                                    "a second for the driver to complete "
1396                                    "initialization", drv->ifname);
1397                         sleep(1);
1398                 }
1399         }
1400
1401         /*
1402          * Make sure that the driver does not have any obsolete PMKID entries.
1403          */
1404         wpa_driver_nl80211_flush_pmkid(drv);
1405
1406         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1407                 printf("Could not configure driver to use managed mode\n");
1408         }
1409
1410         wpa_driver_nl80211_get_range(drv);
1411
1412         drv->ifindex = if_nametoindex(drv->ifname);
1413
1414         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1415 }
1416
1417
1418 /**
1419  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1420  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1421  *
1422  * Shut down driver interface and processing of driver events. Free
1423  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1424  */
1425 static void wpa_driver_nl80211_deinit(void *priv)
1426 {
1427         struct wpa_driver_nl80211_data *drv = priv;
1428         int flags;
1429
1430 #ifdef CONFIG_CLIENT_MLME
1431         if (drv->monitor_sock >= 0) {
1432                 eloop_unregister_read_sock(drv->monitor_sock);
1433                 close(drv->monitor_sock);
1434         }
1435         if (drv->monitor_ifidx > 0)
1436                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1437         if (drv->capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1438                 wpa_driver_nl80211_set_userspace_mlme(drv, 0);
1439 #endif /* CONFIG_CLIENT_MLME */
1440
1441         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1442
1443         /*
1444          * Clear possibly configured driver parameters in order to make it
1445          * easier to use the driver after wpa_supplicant has been terminated.
1446          */
1447         (void) wpa_driver_nl80211_set_bssid(drv,
1448                                          (u8 *) "\x00\x00\x00\x00\x00\x00");
1449
1450         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1451
1452         eloop_unregister_read_sock(drv->event_sock);
1453
1454         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1455                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1456
1457         close(drv->event_sock);
1458         close(drv->ioctl_sock);
1459         os_free(drv->assoc_req_ies);
1460         os_free(drv->assoc_resp_ies);
1461
1462         genl_family_put(drv->nl80211);
1463         nl_cache_free(drv->nl_cache);
1464         nl_handle_destroy(drv->nl_handle);
1465         nl_cb_put(drv->nl_cb);
1466
1467         os_free(drv);
1468 }
1469
1470
1471 /**
1472  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1473  * @eloop_ctx: Unused
1474  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1475  *
1476  * This function can be used as registered timeout when starting a scan to
1477  * generate a scan completed event if the driver does not report this.
1478  */
1479 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1480 {
1481         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1482         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1483 }
1484
1485
1486 /**
1487  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1488  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1489  * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1490  *      all SSIDs (either active scan with broadcast SSID or passive
1491  *      scan
1492  * @ssid_len: Length of the SSID
1493  * Returns: 0 on success, -1 on failure
1494  */
1495 static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len)
1496 {
1497         struct wpa_driver_nl80211_data *drv = priv;
1498         int ret = 0, timeout;
1499         struct nl_msg *msg, *ssids;
1500
1501         msg = nlmsg_alloc();
1502         ssids = nlmsg_alloc();
1503         if (!msg || !ssids) {
1504                 nlmsg_free(msg);
1505                 nlmsg_free(ssids);
1506                 return -1;
1507         }
1508
1509         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1510                     NL80211_CMD_TRIGGER_SCAN, 0);
1511
1512         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1513
1514         if (ssid && ssid_len) {
1515                 /* Request an active scan for a specific SSID */
1516                 NLA_PUT(ssids, 1, ssid_len, ssid);
1517         } else {
1518                 /* Request an active scan for wildcard SSID */
1519                 NLA_PUT(ssids, 1, 0, "");
1520         }
1521         nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1522
1523         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1524         msg = NULL;
1525         if (ret) {
1526                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1527                            "(%s)", ret, strerror(-ret));
1528                 goto nla_put_failure;
1529         }
1530
1531         /* Not all drivers generate "scan completed" wireless event, so try to
1532          * read results after a timeout. */
1533         timeout = 10;
1534         if (drv->scan_complete_events) {
1535                 /*
1536                  * The driver seems to deliver SIOCGIWSCAN events to notify
1537                  * when scan is complete, so use longer timeout to avoid race
1538                  * conditions with scanning and following association request.
1539                  */
1540                 timeout = 30;
1541         }
1542         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1543                    "seconds", ret, timeout);
1544         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1545         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1546                                drv, drv->ctx);
1547
1548 nla_put_failure:
1549         nlmsg_free(ssids);
1550         nlmsg_free(msg);
1551         return ret;
1552 }
1553
1554
1555 static u8 * wpa_driver_nl80211_giwscan(struct wpa_driver_nl80211_data *drv,
1556                                     size_t *len)
1557 {
1558         struct iwreq iwr;
1559         u8 *res_buf;
1560         size_t res_buf_len;
1561
1562         res_buf_len = IW_SCAN_MAX_DATA;
1563         for (;;) {
1564                 res_buf = os_malloc(res_buf_len);
1565                 if (res_buf == NULL)
1566                         return NULL;
1567                 os_memset(&iwr, 0, sizeof(iwr));
1568                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1569                 iwr.u.data.pointer = res_buf;
1570                 iwr.u.data.length = res_buf_len;
1571
1572                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1573                         break;
1574
1575                 if (errno == E2BIG && res_buf_len < 65535) {
1576                         os_free(res_buf);
1577                         res_buf = NULL;
1578                         res_buf_len *= 2;
1579                         if (res_buf_len > 65535)
1580                                 res_buf_len = 65535; /* 16-bit length field */
1581                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1582                                    "trying larger buffer (%lu bytes)",
1583                                    (unsigned long) res_buf_len);
1584                 } else {
1585                         perror("ioctl[SIOCGIWSCAN]");
1586                         os_free(res_buf);
1587                         return NULL;
1588                 }
1589         }
1590
1591         if (iwr.u.data.length > res_buf_len) {
1592                 os_free(res_buf);
1593                 return NULL;
1594         }
1595         *len = iwr.u.data.length;
1596
1597         return res_buf;
1598 }
1599
1600
1601 /*
1602  * Data structure for collecting WEXT scan results. This is needed to allow
1603  * the various methods of reporting IEs to be combined into a single IE buffer.
1604  */
1605 struct wext_scan_data {
1606         struct wpa_scan_res res;
1607         u8 *ie;
1608         size_t ie_len;
1609         u8 ssid[32];
1610         size_t ssid_len;
1611         int maxrate;
1612 };
1613
1614
1615 static void wext_get_scan_mode(struct iw_event *iwe,
1616                                struct wext_scan_data *res)
1617 {
1618         if (iwe->u.mode == IW_MODE_ADHOC)
1619                 res->res.caps |= IEEE80211_CAP_IBSS;
1620         else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1621                 res->res.caps |= IEEE80211_CAP_ESS;
1622 }
1623
1624
1625 static void wext_get_scan_ssid(struct iw_event *iwe,
1626                                struct wext_scan_data *res, char *custom,
1627                                char *end)
1628 {
1629         int ssid_len = iwe->u.essid.length;
1630         if (custom + ssid_len > end)
1631                 return;
1632         if (iwe->u.essid.flags &&
1633             ssid_len > 0 &&
1634             ssid_len <= IW_ESSID_MAX_SIZE) {
1635                 os_memcpy(res->ssid, custom, ssid_len);
1636                 res->ssid_len = ssid_len;
1637         }
1638 }
1639
1640
1641 static void wext_get_scan_freq(struct iw_event *iwe,
1642                                struct wext_scan_data *res)
1643 {
1644         int divi = 1000000, i;
1645
1646         if (iwe->u.freq.e == 0) {
1647                 /*
1648                  * Some drivers do not report frequency, but a channel.
1649                  * Try to map this to frequency by assuming they are using
1650                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
1651                  * frequency if the driver sends both frequency and channel,
1652                  * since the driver may be sending an A-band channel that we
1653                  * don't handle here.
1654                  */
1655
1656                 if (res->res.freq)
1657                         return;
1658
1659                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1660                         res->res.freq = 2407 + 5 * iwe->u.freq.m;
1661                         return;
1662                 } else if (iwe->u.freq.m == 14) {
1663                         res->res.freq = 2484;
1664                         return;
1665                 }
1666         }
1667
1668         if (iwe->u.freq.e > 6) {
1669                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1670                            MACSTR " m=%d e=%d)",
1671                            MAC2STR(res->res.bssid), iwe->u.freq.m,
1672                            iwe->u.freq.e);
1673                 return;
1674         }
1675
1676         for (i = 0; i < iwe->u.freq.e; i++)
1677                 divi /= 10;
1678         res->res.freq = iwe->u.freq.m / divi;
1679 }
1680
1681
1682 static void wext_get_scan_qual(struct iw_event *iwe,
1683                                struct wext_scan_data *res)
1684 {
1685         res->res.qual = iwe->u.qual.qual;
1686         res->res.noise = iwe->u.qual.noise;
1687         res->res.level = iwe->u.qual.level;
1688 }
1689
1690
1691 static void wext_get_scan_encode(struct iw_event *iwe,
1692                                  struct wext_scan_data *res)
1693 {
1694         if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1695                 res->res.caps |= IEEE80211_CAP_PRIVACY;
1696 }
1697
1698
1699 static void wext_get_scan_rate(struct iw_event *iwe,
1700                                struct wext_scan_data *res, char *pos,
1701                                char *end)
1702 {
1703         int maxrate;
1704         char *custom = pos + IW_EV_LCP_LEN;
1705         struct iw_param p;
1706         size_t clen;
1707
1708         clen = iwe->len;
1709         if (custom + clen > end)
1710                 return;
1711         maxrate = 0;
1712         while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1713                 /* Note: may be misaligned, make a local, aligned copy */
1714                 os_memcpy(&p, custom, sizeof(struct iw_param));
1715                 if (p.value > maxrate)
1716                         maxrate = p.value;
1717                 clen -= sizeof(struct iw_param);
1718                 custom += sizeof(struct iw_param);
1719         }
1720
1721         /* Convert the maxrate from WE-style (b/s units) to
1722          * 802.11 rates (500000 b/s units).
1723          */
1724         res->maxrate = maxrate / 500000;
1725 }
1726
1727
1728 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1729                                     struct wext_scan_data *res, char *custom,
1730                                     char *end)
1731 {
1732         char *genie, *gpos, *gend;
1733         u8 *tmp;
1734
1735         if (iwe->u.data.length == 0)
1736                 return;
1737
1738         gpos = genie = custom;
1739         gend = genie + iwe->u.data.length;
1740         if (gend > end) {
1741                 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1742                 return;
1743         }
1744
1745         tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1746         if (tmp == NULL)
1747                 return;
1748         os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1749         res->ie = tmp;
1750         res->ie_len += gend - gpos;
1751 }
1752
1753
1754 static void wext_get_scan_custom(struct iw_event *iwe,
1755                                  struct wext_scan_data *res, char *custom,
1756                                  char *end)
1757 {
1758         size_t clen;
1759         u8 *tmp;
1760
1761         clen = iwe->u.data.length;
1762         if (custom + clen > end)
1763                 return;
1764
1765         if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1766                 char *spos;
1767                 int bytes;
1768                 spos = custom + 7;
1769                 bytes = custom + clen - spos;
1770                 if (bytes & 1 || bytes == 0)
1771                         return;
1772                 bytes /= 2;
1773                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1774                 if (tmp == NULL)
1775                         return;
1776                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1777                 res->ie = tmp;
1778                 res->ie_len += bytes;
1779         } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1780                 char *spos;
1781                 int bytes;
1782                 spos = custom + 7;
1783                 bytes = custom + clen - spos;
1784                 if (bytes & 1 || bytes == 0)
1785                         return;
1786                 bytes /= 2;
1787                 tmp = os_realloc(res->ie, res->ie_len + bytes);
1788                 if (tmp == NULL)
1789                         return;
1790                 hexstr2bin(spos, tmp + res->ie_len, bytes);
1791                 res->ie = tmp;
1792                 res->ie_len += bytes;
1793         } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1794                 char *spos;
1795                 int bytes;
1796                 u8 bin[8];
1797                 spos = custom + 4;
1798                 bytes = custom + clen - spos;
1799                 if (bytes != 16) {
1800                         wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1801                         return;
1802                 }
1803                 bytes /= 2;
1804                 hexstr2bin(spos, bin, bytes);
1805                 res->res.tsf += WPA_GET_BE64(bin);
1806         }
1807 }
1808
1809
1810 static int wext_19_iw_point(struct wpa_driver_nl80211_data *drv, u16 cmd)
1811 {
1812         return drv->we_version_compiled > 18 &&
1813                 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1814                  cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1815 }
1816
1817
1818 static void wpa_driver_nl80211_add_scan_entry(struct wpa_scan_results *res,
1819                                            struct wext_scan_data *data)
1820 {
1821         struct wpa_scan_res **tmp;
1822         struct wpa_scan_res *r;
1823         size_t extra_len;
1824         u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1825
1826         /* Figure out whether we need to fake any IEs */
1827         pos = data->ie;
1828         end = pos + data->ie_len;
1829         while (pos && pos + 1 < end) {
1830                 if (pos + 2 + pos[1] > end)
1831                         break;
1832                 if (pos[0] == WLAN_EID_SSID)
1833                         ssid_ie = pos;
1834                 else if (pos[0] == WLAN_EID_SUPP_RATES)
1835                         rate_ie = pos;
1836                 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1837                         rate_ie = pos;
1838                 pos += 2 + pos[1];
1839         }
1840
1841         extra_len = 0;
1842         if (ssid_ie == NULL)
1843                 extra_len += 2 + data->ssid_len;
1844         if (rate_ie == NULL && data->maxrate)
1845                 extra_len += 3;
1846
1847         r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1848         if (r == NULL)
1849                 return;
1850         os_memcpy(r, &data->res, sizeof(*r));
1851         r->ie_len = extra_len + data->ie_len;
1852         pos = (u8 *) (r + 1);
1853         if (ssid_ie == NULL) {
1854                 /*
1855                  * Generate a fake SSID IE since the driver did not report
1856                  * a full IE list.
1857                  */
1858                 *pos++ = WLAN_EID_SSID;
1859                 *pos++ = data->ssid_len;
1860                 os_memcpy(pos, data->ssid, data->ssid_len);
1861                 pos += data->ssid_len;
1862         }
1863         if (rate_ie == NULL && data->maxrate) {
1864                 /*
1865                  * Generate a fake Supported Rates IE since the driver did not
1866                  * report a full IE list.
1867                  */
1868                 *pos++ = WLAN_EID_SUPP_RATES;
1869                 *pos++ = 1;
1870                 *pos++ = data->maxrate;
1871         }
1872         if (data->ie)
1873                 os_memcpy(pos, data->ie, data->ie_len);
1874
1875         tmp = os_realloc(res->res,
1876                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1877         if (tmp == NULL) {
1878                 os_free(r);
1879                 return;
1880         }
1881         tmp[res->num++] = r;
1882         res->res = tmp;
1883 }
1884
1885
1886 /**
1887  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1888  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1889  * Returns: Scan results on success, -1 on failure
1890  */
1891 static struct wpa_scan_results *
1892 wpa_driver_nl80211_get_scan_results(void *priv)
1893 {
1894         struct wpa_driver_nl80211_data *drv = priv;
1895         size_t ap_num = 0, len;
1896         int first;
1897         u8 *res_buf;
1898         struct iw_event iwe_buf, *iwe = &iwe_buf;
1899         char *pos, *end, *custom;
1900         struct wpa_scan_results *res;
1901         struct wext_scan_data data;
1902
1903         res_buf = wpa_driver_nl80211_giwscan(drv, &len);
1904         if (res_buf == NULL)
1905                 return NULL;
1906
1907         ap_num = 0;
1908         first = 1;
1909
1910         res = os_zalloc(sizeof(*res));
1911         if (res == NULL) {
1912                 os_free(res_buf);
1913                 return NULL;
1914         }
1915
1916         pos = (char *) res_buf;
1917         end = (char *) res_buf + len;
1918         os_memset(&data, 0, sizeof(data));
1919
1920         while (pos + IW_EV_LCP_LEN <= end) {
1921                 /* Event data may be unaligned, so make a local, aligned copy
1922                  * before processing. */
1923                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1924                 if (iwe->len <= IW_EV_LCP_LEN)
1925                         break;
1926
1927                 custom = pos + IW_EV_POINT_LEN;
1928                 if (wext_19_iw_point(drv, iwe->cmd)) {
1929                         /* WE-19 removed the pointer from struct iw_point */
1930                         char *dpos = (char *) &iwe_buf.u.data.length;
1931                         int dlen = dpos - (char *) &iwe_buf;
1932                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1933                                   sizeof(struct iw_event) - dlen);
1934                 } else {
1935                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1936                         custom += IW_EV_POINT_OFF;
1937                 }
1938
1939                 switch (iwe->cmd) {
1940                 case SIOCGIWAP:
1941                         if (!first)
1942                                 wpa_driver_nl80211_add_scan_entry(res, &data);
1943                         first = 0;
1944                         os_free(data.ie);
1945                         os_memset(&data, 0, sizeof(data));
1946                         os_memcpy(data.res.bssid,
1947                                   iwe->u.ap_addr.sa_data, ETH_ALEN);
1948                         break;
1949                 case SIOCGIWMODE:
1950                         wext_get_scan_mode(iwe, &data);
1951                         break;
1952                 case SIOCGIWESSID:
1953                         wext_get_scan_ssid(iwe, &data, custom, end);
1954                         break;
1955                 case SIOCGIWFREQ:
1956                         wext_get_scan_freq(iwe, &data);
1957                         break;
1958                 case IWEVQUAL:
1959                         wext_get_scan_qual(iwe, &data);
1960                         break;
1961                 case SIOCGIWENCODE:
1962                         wext_get_scan_encode(iwe, &data);
1963                         break;
1964                 case SIOCGIWRATE:
1965                         wext_get_scan_rate(iwe, &data, pos, end);
1966                         break;
1967                 case IWEVGENIE:
1968                         wext_get_scan_iwevgenie(iwe, &data, custom, end);
1969                         break;
1970                 case IWEVCUSTOM:
1971                         wext_get_scan_custom(iwe, &data, custom, end);
1972                         break;
1973                 }
1974
1975                 pos += iwe->len;
1976         }
1977         os_free(res_buf);
1978         res_buf = NULL;
1979         if (!first)
1980                 wpa_driver_nl80211_add_scan_entry(res, &data);
1981         os_free(data.ie);
1982
1983         wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1984                    (unsigned long) len, (unsigned long) res->num);
1985
1986         return res;
1987 }
1988
1989
1990 static int wpa_driver_nl80211_get_range(void *priv)
1991 {
1992         struct wpa_driver_nl80211_data *drv = priv;
1993         struct iw_range *range;
1994         struct iwreq iwr;
1995         int minlen;
1996         size_t buflen;
1997
1998         /*
1999          * Use larger buffer than struct iw_range in order to allow the
2000          * structure to grow in the future.
2001          */
2002         buflen = sizeof(struct iw_range) + 500;
2003         range = os_zalloc(buflen);
2004         if (range == NULL)
2005                 return -1;
2006
2007         os_memset(&iwr, 0, sizeof(iwr));
2008         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2009         iwr.u.data.pointer = (caddr_t) range;
2010         iwr.u.data.length = buflen;
2011
2012         minlen = ((char *) &range->enc_capa) - (char *) range +
2013                 sizeof(range->enc_capa);
2014
2015         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2016                 perror("ioctl[SIOCGIWRANGE]");
2017                 os_free(range);
2018                 return -1;
2019         } else if (iwr.u.data.length >= minlen &&
2020                    range->we_version_compiled >= 18) {
2021                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2022                            "WE(source)=%d enc_capa=0x%x",
2023                            range->we_version_compiled,
2024                            range->we_version_source,
2025                            range->enc_capa);
2026                 drv->has_capability = 1;
2027                 drv->we_version_compiled = range->we_version_compiled;
2028                 if (range->enc_capa & IW_ENC_CAPA_WPA) {
2029                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
2030                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
2031                 }
2032                 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
2033                         drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
2034                                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
2035                 }
2036                 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
2037                         WPA_DRIVER_CAPA_ENC_WEP104;
2038                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
2039                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
2040                 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
2041                         drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
2042                 wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
2043                            drv->capa.key_mgmt, drv->capa.enc);
2044         } else {
2045                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
2046                            "assuming WPA is not supported");
2047         }
2048
2049         os_free(range);
2050         return 0;
2051 }
2052
2053
2054 static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
2055 {
2056         struct wpa_driver_nl80211_data *drv = priv;
2057         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2058
2059         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
2060                                               enabled);
2061 }
2062
2063
2064 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
2065                                       const u8 *addr, int key_idx,
2066                                       int set_tx, const u8 *seq,
2067                                       size_t seq_len,
2068                                       const u8 *key, size_t key_len)
2069 {
2070         struct wpa_driver_nl80211_data *drv = priv;
2071         int err;
2072         struct nl_msg *msg;
2073
2074         wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
2075                    "seq_len=%lu key_len=%lu",
2076                    __func__, alg, addr, key_idx, set_tx,
2077                    (unsigned long) seq_len, (unsigned long) key_len);
2078
2079         msg = nlmsg_alloc();
2080         if (msg == NULL)
2081                 return -1;
2082
2083         if (alg == WPA_ALG_NONE) {
2084                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2085                             NL80211_CMD_DEL_KEY, 0);
2086         } else {
2087                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2088                             NL80211_CMD_NEW_KEY, 0);
2089                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2090                 switch (alg) {
2091                 case WPA_ALG_WEP:
2092                         if (key_len == 5)
2093                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2094                                             0x000FAC01);
2095                         else
2096                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2097                                             0x000FAC05);
2098                         break;
2099                 case WPA_ALG_TKIP:
2100                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
2101                         break;
2102                 case WPA_ALG_CCMP:
2103                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
2104                         break;
2105                 default:
2106                         nlmsg_free(msg);
2107                         return -1;
2108                 }
2109         }
2110
2111         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2112         {
2113                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
2114                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2115         }
2116         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2117         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2118
2119         err = send_and_recv_msgs(drv, msg, NULL, NULL);
2120         if (err) {
2121                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
2122                 return -1;
2123         }
2124
2125         if (set_tx && alg != WPA_ALG_NONE) {
2126                 msg = nlmsg_alloc();
2127                 if (msg == NULL)
2128                         return -1;
2129
2130                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2131                             0, NL80211_CMD_SET_KEY, 0);
2132                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2133                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2134                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2135
2136                 err = send_and_recv_msgs(drv, msg, NULL, NULL);
2137                 if (err) {
2138                         wpa_printf(MSG_DEBUG, "nl80211: set default key "
2139                                    "failed; err=%d", err);
2140                         return -1;
2141                 }
2142         }
2143
2144         return 0;
2145
2146 nla_put_failure:
2147         return -ENOBUFS;
2148 }
2149
2150
2151 static int wpa_driver_nl80211_set_countermeasures(void *priv,
2152                                                int enabled)
2153 {
2154         struct wpa_driver_nl80211_data *drv = priv;
2155         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2156         return wpa_driver_nl80211_set_auth_param(drv,
2157                                               IW_AUTH_TKIP_COUNTERMEASURES,
2158                                               enabled);
2159 }
2160
2161
2162 static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
2163                                                 int enabled)
2164 {
2165         struct wpa_driver_nl80211_data *drv = priv;
2166         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2167         drv->use_crypt = enabled;
2168         return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2169                                               enabled);
2170 }
2171
2172
2173 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2174                                 const u8 *addr, int cmd, int reason_code)
2175 {
2176         struct iwreq iwr;
2177         struct iw_mlme mlme;
2178         int ret = 0;
2179
2180         os_memset(&iwr, 0, sizeof(iwr));
2181         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2182         os_memset(&mlme, 0, sizeof(mlme));
2183         mlme.cmd = cmd;
2184         mlme.reason_code = reason_code;
2185         mlme.addr.sa_family = ARPHRD_ETHER;
2186         os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
2187         iwr.u.data.pointer = (caddr_t) &mlme;
2188         iwr.u.data.length = sizeof(mlme);
2189
2190         if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
2191                 perror("ioctl[SIOCSIWMLME]");
2192                 ret = -1;
2193         }
2194
2195         return ret;
2196 }
2197
2198
2199 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2200                                           int reason_code)
2201 {
2202         struct wpa_driver_nl80211_data *drv = priv;
2203         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2204         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2205 }
2206
2207
2208 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2209                                         int reason_code)
2210 {
2211         struct wpa_driver_nl80211_data *drv = priv;
2212         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2213         return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DISASSOC,
2214                                     reason_code);
2215 }
2216
2217
2218 static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
2219                                       size_t ie_len)
2220 {
2221         struct wpa_driver_nl80211_data *drv = priv;
2222         struct iwreq iwr;
2223         int ret = 0;
2224
2225         os_memset(&iwr, 0, sizeof(iwr));
2226         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2227         iwr.u.data.pointer = (caddr_t) ie;
2228         iwr.u.data.length = ie_len;
2229
2230         if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2231                 perror("ioctl[SIOCSIWGENIE]");
2232                 ret = -1;
2233         }
2234
2235         return ret;
2236 }
2237
2238
2239 static int wpa_driver_nl80211_cipher2wext(int cipher)
2240 {
2241         switch (cipher) {
2242         case CIPHER_NONE:
2243                 return IW_AUTH_CIPHER_NONE;
2244         case CIPHER_WEP40:
2245                 return IW_AUTH_CIPHER_WEP40;
2246         case CIPHER_TKIP:
2247                 return IW_AUTH_CIPHER_TKIP;
2248         case CIPHER_CCMP:
2249                 return IW_AUTH_CIPHER_CCMP;
2250         case CIPHER_WEP104:
2251                 return IW_AUTH_CIPHER_WEP104;
2252         default:
2253                 return 0;
2254         }
2255 }
2256
2257
2258 static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
2259 {
2260         switch (keymgmt) {
2261         case KEY_MGMT_802_1X:
2262         case KEY_MGMT_802_1X_NO_WPA:
2263                 return IW_AUTH_KEY_MGMT_802_1X;
2264         case KEY_MGMT_PSK:
2265                 return IW_AUTH_KEY_MGMT_PSK;
2266         default:
2267                 return 0;
2268         }
2269 }
2270
2271
2272 static int
2273 wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
2274                                   struct wpa_driver_associate_params *params)
2275 {
2276         struct iwreq iwr;
2277         int ret = 0;
2278
2279         wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2280                    "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2281
2282         os_memset(&iwr, 0, sizeof(iwr));
2283         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2284         /* Just changing mode, not actual keys */
2285         iwr.u.encoding.flags = 0;
2286         iwr.u.encoding.pointer = (caddr_t) NULL;
2287         iwr.u.encoding.length = 0;
2288
2289         /*
2290          * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2291          * different things. Here they are used to indicate Open System vs.
2292          * Shared Key authentication algorithm. However, some drivers may use
2293          * them to select between open/restricted WEP encrypted (open = allow
2294          * both unencrypted and encrypted frames; restricted = only allow
2295          * encrypted frames).
2296          */
2297
2298         if (!drv->use_crypt) {
2299                 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2300         } else {
2301                 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2302                         iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2303                 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2304                         iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2305         }
2306
2307         if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2308                 perror("ioctl[SIOCSIWENCODE]");
2309                 ret = -1;
2310         }
2311
2312         return ret;
2313 }
2314
2315
2316 static int wpa_driver_nl80211_associate(
2317         void *priv, struct wpa_driver_associate_params *params)
2318 {
2319         struct wpa_driver_nl80211_data *drv = priv;
2320         int ret = 0;
2321         int allow_unencrypted_eapol;
2322         int value;
2323
2324         wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2325
2326         /*
2327          * If the driver did not support SIOCSIWAUTH, fallback to
2328          * SIOCSIWENCODE here.
2329          */
2330         if (drv->auth_alg_fallback &&
2331             wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
2332                 ret = -1;
2333
2334         if (!params->bssid &&
2335             wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
2336                 ret = -1;
2337
2338         /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2339          * from configuration, not from here, where only the selected suite is
2340          * available */
2341         if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2342             < 0)
2343                 ret = -1;
2344         if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2345                 value = IW_AUTH_WPA_VERSION_DISABLED;
2346         else if (params->wpa_ie[0] == WLAN_EID_RSN)
2347                 value = IW_AUTH_WPA_VERSION_WPA2;
2348         else
2349                 value = IW_AUTH_WPA_VERSION_WPA;
2350         if (wpa_driver_nl80211_set_auth_param(drv,
2351                                            IW_AUTH_WPA_VERSION, value) < 0)
2352                 ret = -1;
2353         value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
2354         if (wpa_driver_nl80211_set_auth_param(drv,
2355                                            IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2356                 ret = -1;
2357         value = wpa_driver_nl80211_cipher2wext(params->group_suite);
2358         if (wpa_driver_nl80211_set_auth_param(drv,
2359                                            IW_AUTH_CIPHER_GROUP, value) < 0)
2360                 ret = -1;
2361         value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
2362         if (wpa_driver_nl80211_set_auth_param(drv,
2363                                            IW_AUTH_KEY_MGMT, value) < 0)
2364                 ret = -1;
2365         value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2366                 params->pairwise_suite != CIPHER_NONE ||
2367                 params->group_suite != CIPHER_NONE ||
2368                 params->wpa_ie_len;
2369         if (wpa_driver_nl80211_set_auth_param(drv,
2370                                            IW_AUTH_PRIVACY_INVOKED, value) < 0)
2371                 ret = -1;
2372
2373         /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2374          * not using WPA. IEEE 802.1X specifies that these frames are not
2375          * encrypted, but WPA encrypts them when pairwise keys are in use. */
2376         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2377             params->key_mgmt_suite == KEY_MGMT_PSK)
2378                 allow_unencrypted_eapol = 0;
2379         else
2380                 allow_unencrypted_eapol = 1;
2381
2382         if (wpa_driver_nl80211_set_auth_param(drv,
2383                                            IW_AUTH_RX_UNENCRYPTED_EAPOL,
2384                                            allow_unencrypted_eapol) < 0)
2385                 ret = -1;
2386         if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
2387                 ret = -1;
2388         if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2389                 ret = -1;
2390         if (params->bssid &&
2391             wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
2392                 ret = -1;
2393
2394         return ret;
2395 }
2396
2397
2398 static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
2399 {
2400         struct wpa_driver_nl80211_data *drv = priv;
2401         int algs = 0, res;
2402
2403         if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2404                 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2405         if (auth_alg & AUTH_ALG_SHARED_KEY)
2406                 algs |= IW_AUTH_ALG_SHARED_KEY;
2407         if (auth_alg & AUTH_ALG_LEAP)
2408                 algs |= IW_AUTH_ALG_LEAP;
2409         if (algs == 0) {
2410                 /* at least one algorithm should be set */
2411                 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2412         }
2413
2414         res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2415                                              algs);
2416         drv->auth_alg_fallback = res == -2;
2417         return res;
2418 }
2419
2420
2421 /**
2422  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2423  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2424  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2425  * Returns: 0 on success, -1 on failure
2426  */
2427 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2428 {
2429         struct wpa_driver_nl80211_data *drv = priv;
2430         int ret = -1, flags;
2431         struct nl_msg *msg;
2432
2433         msg = nlmsg_alloc();
2434         if (!msg)
2435                 return -1;
2436
2437         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2438                     0, NL80211_CMD_SET_INTERFACE, 0);
2439         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2440         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2441                     mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);
2442
2443         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2444         if (!ret)
2445                 return 0;
2446         else
2447                 goto try_again;
2448
2449 nla_put_failure:
2450         wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode");
2451         return -1;
2452
2453 try_again:
2454         /* mac80211 doesn't allow mode changes while the device is up, so
2455          * take the device down, try to set the mode again, and bring the
2456          * device back up.
2457          */
2458         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2459                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2460
2461                 /* Try to set the mode again while the interface is down */
2462                 msg = nlmsg_alloc();
2463                 if (!msg)
2464                         return -1;
2465
2466                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2467                             0, NL80211_CMD_SET_INTERFACE, 0);
2468                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2469                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2470                             mode ? NL80211_IFTYPE_ADHOC :
2471                             NL80211_IFTYPE_STATION);
2472                 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2473                 if (ret) {
2474                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2475                                    "mode", drv->ifname);
2476                 }
2477
2478                 /* Ignore return value of get_ifflags to ensure that the device
2479                  * is always up like it was before this function was called.
2480                  */
2481                 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2482                 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2483         }
2484
2485         return ret;
2486 }
2487
2488
2489 static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
2490                                  u32 cmd, const u8 *bssid, const u8 *pmkid)
2491 {
2492         struct iwreq iwr;
2493         struct iw_pmksa pmksa;
2494         int ret = 0;
2495
2496         os_memset(&iwr, 0, sizeof(iwr));
2497         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2498         os_memset(&pmksa, 0, sizeof(pmksa));
2499         pmksa.cmd = cmd;
2500         pmksa.bssid.sa_family = ARPHRD_ETHER;
2501         if (bssid)
2502                 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2503         if (pmkid)
2504                 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2505         iwr.u.data.pointer = (caddr_t) &pmksa;
2506         iwr.u.data.length = sizeof(pmksa);
2507
2508         if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2509                 if (errno != EOPNOTSUPP)
2510                         perror("ioctl[SIOCSIWPMKSA]");
2511                 ret = -1;
2512         }
2513
2514         return ret;
2515 }
2516
2517
2518 static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
2519                                      const u8 *pmkid)
2520 {
2521         struct wpa_driver_nl80211_data *drv = priv;
2522         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2523 }
2524
2525
2526 static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
2527                                         const u8 *pmkid)
2528 {
2529         struct wpa_driver_nl80211_data *drv = priv;
2530         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2531 }
2532
2533
2534 static int wpa_driver_nl80211_flush_pmkid(void *priv)
2535 {
2536         struct wpa_driver_nl80211_data *drv = priv;
2537         return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2538 }
2539
2540
2541 static int wpa_driver_nl80211_get_capa(void *priv,
2542                                        struct wpa_driver_capa *capa)
2543 {
2544         struct wpa_driver_nl80211_data *drv = priv;
2545         if (!drv->has_capability)
2546                 return -1;
2547         os_memcpy(capa, &drv->capa, sizeof(*capa));
2548         return 0;
2549 }
2550
2551
2552 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2553 {
2554         struct wpa_driver_nl80211_data *drv = priv;
2555
2556         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2557                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2558         drv->operstate = state;
2559         return wpa_driver_nl80211_send_oper_ifla(
2560                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2561 }
2562
2563
2564 #ifdef CONFIG_CLIENT_MLME
2565 static int wpa_driver_nl80211_open_mlme(struct wpa_driver_nl80211_data *drv)
2566 {
2567         if (wpa_driver_nl80211_set_userspace_mlme(drv, 1) < 0) {
2568                 wpa_printf(MSG_ERROR, "nl80211: Failed to enable userspace "
2569                            "MLME");
2570                 return -1;
2571         }
2572         if (wpa_driver_nl80211_create_monitor_interface(drv)) {
2573                 wpa_printf(MSG_ERROR, "nl80211: Failed to create monitor "
2574                            "interface");
2575                 return -1;
2576         }
2577         return 0;
2578 }
2579 #endif /* CONFIG_CLIENT_MLME */
2580
2581
2582 static int wpa_driver_nl80211_set_param(void *priv, const char *param)
2583 {
2584 #ifdef CONFIG_CLIENT_MLME
2585         struct wpa_driver_nl80211_data *drv = priv;
2586
2587         if (param == NULL)
2588                 return 0;
2589
2590         wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2591
2592         if (os_strstr(param, "use_mlme=1")) {
2593                 wpa_printf(MSG_DEBUG, "nl80211: Using user space MLME");
2594                 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2595
2596                 if (wpa_driver_nl80211_open_mlme(drv))
2597                         return -1;
2598         }
2599 #endif /* CONFIG_CLIENT_MLME */
2600
2601         return 0;
2602 }
2603
2604
2605 #ifdef CONFIG_CLIENT_MLME
2606
2607 struct phy_info_arg {
2608         u16 *num_modes;
2609         struct wpa_hw_modes *modes;
2610 };
2611
2612
2613 static int phy_info_handler(struct nl_msg *msg, void *arg)
2614 {
2615         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2616         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2617         struct phy_info_arg *phy_info = arg;
2618
2619         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2620
2621         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2622         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1]
2623                 = {
2624                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2625                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2626                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2627                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2628                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2629         };
2630
2631         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2632         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2633                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2634                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] =
2635                 { .type = NLA_FLAG },
2636         };
2637
2638         struct nlattr *nl_band;
2639         struct nlattr *nl_freq;
2640         struct nlattr *nl_rate;
2641         int rem_band, rem_freq, rem_rate;
2642         struct wpa_hw_modes *mode;
2643         int idx, mode_is_set;
2644
2645         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2646                   genlmsg_attrlen(gnlh, 0), NULL);
2647
2648         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2649                 return NL_SKIP;
2650
2651         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS],
2652                             rem_band) {
2653                 mode = os_realloc(phy_info->modes,
2654                                   (*phy_info->num_modes + 1) * sizeof(*mode));
2655                 if (!mode)
2656                         return NL_SKIP;
2657                 phy_info->modes = mode;
2658
2659                 mode_is_set = 0;
2660
2661                 mode = &phy_info->modes[*(phy_info->num_modes)];
2662                 os_memset(mode, 0, sizeof(*mode));
2663                 *(phy_info->num_modes) += 1;
2664
2665                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2666                           nla_len(nl_band), NULL);
2667
2668                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2669                                     rem_freq) {
2670                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2671                                   nla_data(nl_freq), nla_len(nl_freq),
2672                                   freq_policy);
2673                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2674                                 continue;
2675                         mode->num_channels++;
2676                 }
2677
2678                 mode->channels = os_zalloc(mode->num_channels *
2679                                            sizeof(struct wpa_channel_data));
2680                 if (!mode->channels)
2681                         return NL_SKIP;
2682
2683                 idx = 0;
2684
2685                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2686                                     rem_freq) {
2687                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2688                                   nla_data(nl_freq), nla_len(nl_freq),
2689                                   freq_policy);
2690                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2691                                 continue;
2692
2693                         mode->channels[idx].freq = nla_get_u32(
2694                                 tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2695                         mode->channels[idx].flag |= WPA_CHAN_W_SCAN |
2696                                 WPA_CHAN_W_ACTIVE_SCAN |
2697                                 WPA_CHAN_W_IBSS;
2698
2699                         if (!mode_is_set) {
2700                                 /* crude heuristic */
2701                                 if (mode->channels[idx].freq < 4000)
2702                                         mode->mode = WPA_MODE_IEEE80211B;
2703                                 else
2704                                         mode->mode = WPA_MODE_IEEE80211A;
2705                                 mode_is_set = 1;
2706                         }
2707
2708                         /* crude heuristic */
2709                         if (mode->channels[idx].freq < 4000) {
2710                                 if (mode->channels[idx].freq == 2848)
2711                                         mode->channels[idx].chan = 14;
2712                                 else
2713                                         mode->channels[idx].chan =
2714                                                 (mode->channels[idx].freq -
2715                                                  2407) / 5;
2716                         } else
2717                                 mode->channels[idx].chan =
2718                                         mode->channels[idx].freq / 5 - 1000;
2719
2720                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2721                                 mode->channels[idx].flag &= ~WPA_CHAN_W_SCAN;
2722                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2723                                 mode->channels[idx].flag &=
2724                                         ~WPA_CHAN_W_ACTIVE_SCAN;
2725                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2726                                 mode->channels[idx].flag &= ~WPA_CHAN_W_IBSS;
2727                         idx++;
2728                 }
2729
2730                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2731                                     rem_rate) {
2732                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2733                                   nla_data(nl_rate), nla_len(nl_rate),
2734                                   rate_policy);
2735                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2736                                 continue;
2737                         mode->num_rates++;
2738                 }
2739
2740                 mode->rates = os_zalloc(mode->num_rates *
2741                                         sizeof(struct wpa_rate_data));
2742                 if (!mode->rates)
2743                         return NL_SKIP;
2744
2745                 idx = 0;
2746
2747                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2748                                     rem_rate) {
2749                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2750                                   nla_data(nl_rate), nla_len(nl_rate),
2751                                   rate_policy);
2752                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2753                                 continue;
2754                         mode->rates[idx].rate = nla_get_u32(
2755                                 tb_rate[NL80211_BITRATE_ATTR_RATE]);
2756
2757                         /* crude heuristic */
2758                         if (mode->mode == WPA_MODE_IEEE80211B &&
2759                             mode->rates[idx].rate > 200)
2760                                 mode->mode = WPA_MODE_IEEE80211G;
2761
2762                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2763                                 mode->rates[idx].flags |= WPA_RATE_PREAMBLE2;
2764
2765                         idx++;
2766                 }
2767         }
2768
2769         return NL_SKIP;
2770 }
2771
2772
2773 static struct wpa_hw_modes *
2774 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2775 {
2776         struct wpa_driver_nl80211_data *drv = priv;
2777         struct nl_msg *msg;
2778         struct phy_info_arg result = {
2779                 .num_modes = num_modes,
2780                 .modes = NULL,
2781         };
2782
2783         *num_modes = 0;
2784         *flags = 0;
2785
2786         msg = nlmsg_alloc();
2787         if (!msg)
2788                 return NULL;
2789
2790         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2791                     0, NL80211_CMD_GET_WIPHY, 0);
2792
2793         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2794
2795         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2796                 return result.modes;
2797 nla_put_failure:
2798         return NULL;
2799 }
2800
2801
2802 static int wpa_driver_nl80211_set_channel(void *priv, wpa_hw_mode phymode,
2803                                           int chan, int freq)
2804 {
2805         return wpa_driver_nl80211_set_freq(priv, freq);
2806 }
2807
2808
2809 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2810                                         size_t data_len)
2811 {
2812         struct wpa_driver_nl80211_data *drv = priv;
2813         __u8 rtap_hdr[] = {
2814                 0x00, 0x00, /* radiotap version */
2815                 0x0e, 0x00, /* radiotap length */
2816                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2817                 0x0c,       /* F_WEP | F_FRAG (encrypt/fragment if required) */
2818                 0x00,       /* padding */
2819                 0x00, 0x00, /* RX and TX flags to indicate that */
2820                 0x00, 0x00, /* this is the injected frame directly */
2821         };
2822         struct iovec iov[2] = {
2823                 {
2824                         .iov_base = &rtap_hdr,
2825                         .iov_len = sizeof(rtap_hdr),
2826                 },
2827                 {
2828                         .iov_base = (void *) data,
2829                         .iov_len = data_len,
2830                 }
2831         };
2832         struct msghdr msg = {
2833                 .msg_name = NULL,
2834                 .msg_namelen = 0,
2835                 .msg_iov = iov,
2836                 .msg_iovlen = 2,
2837                 .msg_control = NULL,
2838                 .msg_controllen = 0,
2839                 .msg_flags = 0,
2840         };
2841
2842         if (sendmsg(drv->monitor_sock, &msg, 0) < 0) {
2843                 perror("send[MLME]");
2844                 return -1;
2845         }
2846
2847         return 0;
2848 }
2849
2850
2851 static int wpa_driver_nl80211_mlme_add_sta(void *priv, const u8 *addr,
2852                                            const u8 *supp_rates,
2853                                            size_t supp_rates_len)
2854 {
2855         struct wpa_driver_nl80211_data *drv = priv;
2856         struct nl_msg *msg;
2857         int ret = -1;
2858
2859         msg = nlmsg_alloc();
2860         if (!msg)
2861                 return -ENOMEM;
2862
2863         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2864                     0, NL80211_CMD_NEW_STATION, 0);
2865
2866         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2867         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2868         /* TODO: Get proper Association ID and listen interval */
2869         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, 1);
2870         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
2871                 supp_rates);
2872         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, 1);
2873
2874         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2875         /* ignore EEXIST, this happens if a STA associates while associated */
2876         if (ret == -EEXIST || ret >= 0)
2877                 ret = 0;
2878
2879 nla_put_failure:
2880         return ret;
2881 }
2882
2883
2884 static int wpa_driver_nl80211_mlme_remove_sta(void *priv, const u8 *addr)
2885 {
2886         struct wpa_driver_nl80211_data *drv = priv;
2887         struct nl_msg *msg;
2888         int ret = -1;
2889
2890         msg = nlmsg_alloc();
2891         if (!msg)
2892                 return -ENOMEM;
2893
2894         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2895                     0, NL80211_CMD_DEL_STATION, 0);
2896
2897         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2898         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2899
2900         ret = 0;
2901
2902         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2903         return ret;
2904
2905 nla_put_failure:
2906         return -ENOBUFS;
2907 }
2908
2909 #endif /* CONFIG_CLIENT_MLME */
2910
2911
2912 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2913         .name = "nl80211",
2914         .desc = "Linux nl80211/cfg80211",
2915         .get_bssid = wpa_driver_nl80211_get_bssid,
2916         .get_ssid = wpa_driver_nl80211_get_ssid,
2917         .set_wpa = wpa_driver_nl80211_set_wpa,
2918         .set_key = wpa_driver_nl80211_set_key,
2919         .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
2920         .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
2921         .scan = wpa_driver_nl80211_scan,
2922         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
2923         .deauthenticate = wpa_driver_nl80211_deauthenticate,
2924         .disassociate = wpa_driver_nl80211_disassociate,
2925         .set_mode = wpa_driver_nl80211_set_mode,
2926         .associate = wpa_driver_nl80211_associate,
2927         .set_auth_alg = wpa_driver_nl80211_set_auth_alg,
2928         .init = wpa_driver_nl80211_init,
2929         .deinit = wpa_driver_nl80211_deinit,
2930         .set_param = wpa_driver_nl80211_set_param,
2931         .add_pmkid = wpa_driver_nl80211_add_pmkid,
2932         .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
2933         .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
2934         .get_capa = wpa_driver_nl80211_get_capa,
2935         .set_operstate = wpa_driver_nl80211_set_operstate,
2936         .set_country = wpa_driver_nl80211_set_country,
2937         .set_probe_req_ie = wpa_driver_nl80211_set_probe_req_ie,
2938 #ifdef CONFIG_CLIENT_MLME
2939         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
2940         .set_channel = wpa_driver_nl80211_set_channel,
2941         .set_ssid = wpa_driver_nl80211_set_ssid,
2942         .set_bssid = wpa_driver_nl80211_set_bssid,
2943         .send_mlme = wpa_driver_nl80211_send_mlme,
2944         .mlme_add_sta = wpa_driver_nl80211_mlme_add_sta,
2945         .mlme_remove_sta = wpa_driver_nl80211_mlme_remove_sta,
2946 #endif /* CONFIG_CLIENT_MLME */
2947 };