src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009-2010, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/genl/ctrl.h>
  25 #include <netpacket/packet.h>
  26 #include <linux/filter.h>
  27 #include "nl80211_copy.h"
  28
  29 #include "common.h"
  30 #include "eloop.h"
  31 #include "common/ieee802_11_defs.h"
  32 #include "netlink.h"
  33 #include "linux_ioctl.h"
  34 #include "radiotap.h"
  35 #include "radiotap_iter.h"
  36 #include "rfkill.h"
  37 #include "driver.h"
  38
  39 #ifdef CONFIG_LIBNL20
  40 /* libnl 2.0 compatibility code */
  41 #define nl_handle nl_sock
  42 #define nl_handle_alloc_cb nl_socket_alloc_cb
  43 #define nl_handle_destroy nl_socket_free
  44 #endif /* CONFIG_LIBNL20 */
  45
  46
  47 #ifndef IFF_LOWER_UP
  48 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  49 #endif
  50 #ifndef IFF_DORMANT
  51 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  52 #endif
  53
  54 #ifndef IF_OPER_DORMANT
  55 #define IF_OPER_DORMANT 5
  56 #endif
  57 #ifndef IF_OPER_UP
  58 #define IF_OPER_UP 6
  59 #endif
  60
  61 struct i802_bss {
  62         struct wpa_driver_nl80211_data *drv;
  63         struct i802_bss *next;
  64         int ifindex;
  65         char ifname[IFNAMSIZ + 1];
  66         unsigned int beacon_set:1;
  67 };
  68
  69 struct wpa_driver_nl80211_data {
  70         void *ctx;
  71         struct netlink_data *netlink;
  72         int ioctl_sock; /* socket for ioctl() use */
  73         char brname[IFNAMSIZ];
  74         int ifindex;
  75         int if_removed;
  76         struct rfkill_data *rfkill;
  77         struct wpa_driver_capa capa;
  78         int has_capability;
  79
  80         int operstate;
  81
  82         int scan_complete_events;
  83
  84         struct nl_handle *nl_handle;
  85         struct nl_handle *nl_handle_event;
  86         struct nl_cache *nl_cache;
  87         struct nl_cache *nl_cache_event;
  88         struct nl_cb *nl_cb;
  89         struct genl_family *nl80211;
  90
  91         u8 auth_bssid[ETH_ALEN];
  92         u8 bssid[ETH_ALEN];
  93         int associated;
  94         u8 ssid[32];
  95         size_t ssid_len;
  96         int nlmode;
  97         int ap_scan_as_station;
  98         unsigned int assoc_freq;
  99
 100         int monitor_sock;
 101         int monitor_ifidx;
 102         int probe_req_report;
 103         int disable_11b_rates;
 104
 105         unsigned int pending_remain_on_chan:1;
 106         unsigned int pending_send_action:1;
 107         unsigned int added_bridge:1;
 108         unsigned int added_if_into_bridge:1;
 109
 110         u64 remain_on_chan_cookie;
 111         u64 send_action_cookie;
 112
 113         struct wpa_driver_scan_filter *filter_ssids;
 114         size_t num_filter_ssids;
 115
 116         struct i802_bss first_bss;
 117
 118 #ifdef HOSTAPD
 119         int eapol_sock; /* socket for EAPOL frames */
 120
 121         int default_if_indices[16];
 122         int *if_indices;
 123         int num_if_indices;
 124
 125         int last_freq;
 126         int last_freq_ht;
 127 #endif /* HOSTAPD */
 128 };
 129
 130
 131 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 132                                             void *timeout_ctx);
 133 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 134 static int
 135 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 136 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 137                                    const u8 *addr, int cmd, u16 reason_code,
 138                                    int local_state_change);
 139 static void nl80211_remove_monitor_interface(
 140         struct wpa_driver_nl80211_data *drv);
 141
 142 #ifdef HOSTAPD
 143 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 144 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 145 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 146 static int wpa_driver_nl80211_if_remove(void *priv,
 147                                         enum wpa_driver_if_type type,
 148                                         const char *ifname);
 149 #else /* HOSTAPD */
 150 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
 151 {
 152         return 0;
 153 }
 154 #endif /* HOSTAPD */
 155
 156 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 157 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
 158                                                         void *timeout_ctx);
 159 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
 160                                      int ifindex, int disabled);
 161
 162
 163 /* nl80211 code */
 164 static int ack_handler(struct nl_msg *msg, void *arg)
 165 {
 166         int *err = arg;
 167         *err = 0;
 168         return NL_STOP;
 169 }
 170
 171 static int finish_handler(struct nl_msg *msg, void *arg)
 172 {
 173         int *ret = arg;
 174         *ret = 0;
 175         return NL_SKIP;
 176 }
 177
 178 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 179                          void *arg)
 180 {
 181         int *ret = arg;
 182         *ret = err->error;
 183         return NL_SKIP;
 184 }
 185
 186
 187 static int no_seq_check(struct nl_msg *msg, void *arg)
 188 {
 189         return NL_OK;
 190 }
 191
 192
 193 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
 194                          struct nl_handle *nl_handle, struct nl_msg *msg,
 195                          int (*valid_handler)(struct nl_msg *, void *),
 196                          void *valid_data)
 197 {
 198         struct nl_cb *cb;
 199         int err = -ENOMEM;
 200
 201         cb = nl_cb_clone(drv->nl_cb);
 202         if (!cb)
 203                 goto out;
 204
 205         err = nl_send_auto_complete(nl_handle, msg);
 206         if (err < 0)
 207                 goto out;
 208
 209         err = 1;
 210
 211         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 212         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 213         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 214
 215         if (valid_handler)
 216                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 217                           valid_handler, valid_data);
 218
 219         while (err > 0)
 220                 nl_recvmsgs(nl_handle, cb);
 221  out:
 222         nl_cb_put(cb);
 223         nlmsg_free(msg);
 224         return err;
 225 }
 226
 227
 228 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 229                               struct nl_msg *msg,
 230                               int (*valid_handler)(struct nl_msg *, void *),
 231                               void *valid_data)
 232 {
 233         return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
 234                              valid_data);
 235 }
 236
 237
 238 struct family_data {
 239         const char *group;
 240         int id;
 241 };
 242
 243
 244 static int family_handler(struct nl_msg *msg, void *arg)
 245 {
 246         struct family_data *res = arg;
 247         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 248         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 249         struct nlattr *mcgrp;
 250         int i;
 251
 252         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 253                   genlmsg_attrlen(gnlh, 0), NULL);
 254         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 255                 return NL_SKIP;
 256
 257         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 258                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 259                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 260                           nla_len(mcgrp), NULL);
 261                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 262                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 263                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 264                                res->group,
 265                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 266                         continue;
 267                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 268                 break;
 269         };
 270
 271         return NL_SKIP;
 272 }
 273
 274
 275 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 276                                const char *family, const char *group)
 277 {
 278         struct nl_msg *msg;
 279         int ret = -1;
 280         struct family_data res = { group, -ENOENT };
 281
 282         msg = nlmsg_alloc();
 283         if (!msg)
 284                 return -ENOMEM;
 285         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 286                     0, 0, CTRL_CMD_GETFAMILY, 0);
 287         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 288
 289         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 290         msg = NULL;
 291         if (ret == 0)
 292                 ret = res.id;
 293
 294 nla_put_failure:
 295         nlmsg_free(msg);
 296         return ret;
 297 }
 298
 299
 300 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 301 {
 302         struct i802_bss *bss = priv;
 303         struct wpa_driver_nl80211_data *drv = bss->drv;
 304         if (!drv->associated)
 305                 return -1;
 306         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 307         return 0;
 308 }
 309
 310
 311 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 312 {
 313         struct i802_bss *bss = priv;
 314         struct wpa_driver_nl80211_data *drv = bss->drv;
 315         if (!drv->associated)
 316                 return -1;
 317         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 318         return drv->ssid_len;
 319 }
 320
 321
 322 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 323                                           char *buf, size_t len, int del)
 324 {
 325         union wpa_event_data event;
 326
 327         os_memset(&event, 0, sizeof(event));
 328         if (len > sizeof(event.interface_status.ifname))
 329                 len = sizeof(event.interface_status.ifname) - 1;
 330         os_memcpy(event.interface_status.ifname, buf, len);
 331         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 332                 EVENT_INTERFACE_ADDED;
 333
 334         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 335                    del ? "DEL" : "NEW",
 336                    event.interface_status.ifname,
 337                    del ? "removed" : "added");
 338
 339         if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
 340                 if (del)
 341                         drv->if_removed = 1;
 342                 else
 343                         drv->if_removed = 0;
 344         }
 345
 346         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 347 }
 348
 349
 350 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 351                                          u8 *buf, size_t len)
 352 {
 353         int attrlen, rta_len;
 354         struct rtattr *attr;
 355
 356         attrlen = len;
 357         attr = (struct rtattr *) buf;
 358
 359         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 360         while (RTA_OK(attr, attrlen)) {
 361                 if (attr->rta_type == IFLA_IFNAME) {
 362                         if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
 363                             == 0)
 364                                 return 1;
 365                         else
 366                                 break;
 367                 }
 368                 attr = RTA_NEXT(attr, attrlen);
 369         }
 370
 371         return 0;
 372 }
 373
 374
 375 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 376                                           int ifindex, u8 *buf, size_t len)
 377 {
 378         if (drv->ifindex == ifindex)
 379                 return 1;
 380
 381         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 382                 drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
 383                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 384                            "interface");
 385                 wpa_driver_nl80211_finish_drv_init(drv);
 386                 return 1;
 387         }
 388
 389         return 0;
 390 }
 391
 392
 393 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 394                                                  struct ifinfomsg *ifi,
 395                                                  u8 *buf, size_t len)
 396 {
 397         struct wpa_driver_nl80211_data *drv = ctx;
 398         int attrlen, rta_len;
 399         struct rtattr *attr;
 400         u32 brid = 0;
 401
 402         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len) &&
 403             !have_ifidx(drv, ifi->ifi_index)) {
 404                 wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
 405                            "ifindex %d", ifi->ifi_index);
 406                 return;
 407         }
 408
 409         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 410                    "(%s%s%s%s)",
 411                    drv->operstate, ifi->ifi_flags,
 412                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 413                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 414                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 415                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 416         /*
 417          * Some drivers send the association event before the operup event--in
 418          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 419          * fails. This will hit us when wpa_supplicant does not need to do
 420          * IEEE 802.1X authentication
 421          */
 422         if (drv->operstate == 1 &&
 423             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 424             !(ifi->ifi_flags & IFF_RUNNING))
 425                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 426                                        -1, IF_OPER_UP);
 427
 428         attrlen = len;
 429         attr = (struct rtattr *) buf;
 430         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 431         while (RTA_OK(attr, attrlen)) {
 432                 if (attr->rta_type == IFLA_IFNAME) {
 433                         wpa_driver_nl80211_event_link(
 434                                 drv,
 435                                 ((char *) attr) + rta_len,
 436                                 attr->rta_len - rta_len, 0);
 437                 } else if (attr->rta_type == IFLA_MASTER)
 438                         brid = nla_get_u32((struct nlattr *) attr);
 439                 attr = RTA_NEXT(attr, attrlen);
 440         }
 441
 442 #ifdef HOSTAPD
 443         if (ifi->ifi_family == AF_BRIDGE && brid) {
 444                 /* device has been added to bridge */
 445                 char namebuf[IFNAMSIZ];
 446                 if_indextoname(brid, namebuf);
 447                 wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
 448                            brid, namebuf);
 449                 add_ifidx(drv, brid);
 450         }
 451 #endif /* HOSTAPD */
 452 }
 453
 454
 455 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 456                                                  struct ifinfomsg *ifi,
 457                                                  u8 *buf, size_t len)
 458 {
 459         struct wpa_driver_nl80211_data *drv = ctx;
 460         int attrlen, rta_len;
 461         struct rtattr *attr;
 462         u32 brid = 0;
 463
 464         attrlen = len;
 465         attr = (struct rtattr *) buf;
 466
 467         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 468         while (RTA_OK(attr, attrlen)) {
 469                 if (attr->rta_type == IFLA_IFNAME) {
 470                         wpa_driver_nl80211_event_link(
 471                                 drv,
 472                                 ((char *) attr) + rta_len,
 473                                 attr->rta_len - rta_len, 1);
 474                 } else if (attr->rta_type == IFLA_MASTER)
 475                         brid = nla_get_u32((struct nlattr *) attr);
 476                 attr = RTA_NEXT(attr, attrlen);
 477         }
 478
 479 #ifdef HOSTAPD
 480         if (ifi->ifi_family == AF_BRIDGE && brid) {
 481                 /* device has been removed from bridge */
 482                 char namebuf[IFNAMSIZ];
 483                 if_indextoname(brid, namebuf);
 484                 wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
 485                            "%s", brid, namebuf);
 486                 del_ifidx(drv, brid);
 487         }
 488 #endif /* HOSTAPD */
 489 }
 490
 491
 492 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 493                             const u8 *frame, size_t len)
 494 {
 495         const struct ieee80211_mgmt *mgmt;
 496         union wpa_event_data event;
 497
 498         mgmt = (const struct ieee80211_mgmt *) frame;
 499         if (len < 24 + sizeof(mgmt->u.auth)) {
 500                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 501                            "frame");
 502                 return;
 503         }
 504
 505         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 506         os_memset(&event, 0, sizeof(event));
 507         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 508         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 509         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 510         if (len > 24 + sizeof(mgmt->u.auth)) {
 511                 event.auth.ies = mgmt->u.auth.variable;
 512                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 513         }
 514
 515         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 516 }
 517
 518
 519 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 520                             const u8 *frame, size_t len)
 521 {
 522         const struct ieee80211_mgmt *mgmt;
 523         union wpa_event_data event;
 524         u16 status;
 525
 526         mgmt = (const struct ieee80211_mgmt *) frame;
 527         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 528                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 529                            "frame");
 530                 return;
 531         }
 532
 533         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 534         if (status != WLAN_STATUS_SUCCESS) {
 535                 os_memset(&event, 0, sizeof(event));
 536                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 537                         event.assoc_reject.resp_ies =
 538                                 (u8 *) mgmt->u.assoc_resp.variable;
 539                         event.assoc_reject.resp_ies_len =
 540                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 541                 }
 542                 event.assoc_reject.status_code = status;
 543
 544                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 545                 return;
 546         }
 547
 548         drv->associated = 1;
 549         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 550
 551         os_memset(&event, 0, sizeof(event));
 552         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 553                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 554                 event.assoc_info.resp_ies_len =
 555                         len - 24 - sizeof(mgmt->u.assoc_resp);
 556         }
 557
 558         event.assoc_info.freq = drv->assoc_freq;
 559
 560         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 561 }
 562
 563
 564 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 565                                enum nl80211_commands cmd, struct nlattr *status,
 566                                struct nlattr *addr, struct nlattr *req_ie,
 567                                struct nlattr *resp_ie)
 568 {
 569         union wpa_event_data event;
 570
 571         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 572                 /*
 573                  * Avoid reporting two association events that would confuse
 574                  * the core code.
 575                  */
 576                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 577                            "when using userspace SME", cmd);
 578                 return;
 579         }
 580
 581         os_memset(&event, 0, sizeof(event));
 582         if (cmd == NL80211_CMD_CONNECT &&
 583             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 584                 if (resp_ie) {
 585                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 586                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 587                 }
 588                 event.assoc_reject.status_code = nla_get_u16(status);
 589                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 590                 return;
 591         }
 592
 593         drv->associated = 1;
 594         if (addr)
 595                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 596
 597         if (req_ie) {
 598                 event.assoc_info.req_ies = nla_data(req_ie);
 599                 event.assoc_info.req_ies_len = nla_len(req_ie);
 600         }
 601         if (resp_ie) {
 602                 event.assoc_info.resp_ies = nla_data(resp_ie);
 603                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 604         }
 605
 606         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 607 }
 608
 609
 610 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 611                                enum nl80211_commands cmd, struct nlattr *addr)
 612 {
 613         union wpa_event_data event;
 614         enum wpa_event_type ev;
 615
 616         if (nla_len(addr) != ETH_ALEN)
 617                 return;
 618
 619         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 620                    cmd, MAC2STR((u8 *) nla_data(addr)));
 621
 622         if (cmd == NL80211_CMD_AUTHENTICATE)
 623                 ev = EVENT_AUTH_TIMED_OUT;
 624         else if (cmd == NL80211_CMD_ASSOCIATE)
 625                 ev = EVENT_ASSOC_TIMED_OUT;
 626         else
 627                 return;
 628
 629         os_memset(&event, 0, sizeof(event));
 630         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 631         wpa_supplicant_event(drv->ctx, ev, &event);
 632 }
 633
 634
 635 static void mlme_event_action(struct wpa_driver_nl80211_data *drv,
 636                               struct nlattr *freq, const u8 *frame, size_t len)
 637 {
 638         const struct ieee80211_mgmt *mgmt;
 639         union wpa_event_data event;
 640         u16 fc, stype;
 641
 642         mgmt = (const struct ieee80211_mgmt *) frame;
 643         if (len < 24) {
 644                 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
 645                 return;
 646         }
 647
 648         fc = le_to_host16(mgmt->frame_control);
 649         stype = WLAN_FC_GET_STYPE(fc);
 650
 651         os_memset(&event, 0, sizeof(event));
 652         event.rx_action.da = mgmt->da;
 653         event.rx_action.sa = mgmt->sa;
 654         event.rx_action.bssid = mgmt->bssid;
 655         event.rx_action.category = mgmt->u.action.category;
 656         event.rx_action.data = &mgmt->u.action.category + 1;
 657         event.rx_action.len = frame + len - event.rx_action.data;
 658         if (freq)
 659                 event.rx_action.freq = nla_get_u32(freq);
 660         wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
 661 }
 662
 663
 664 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
 665                                         struct nlattr *cookie, const u8 *frame,
 666                                         size_t len, struct nlattr *ack)
 667 {
 668         union wpa_event_data event;
 669         const struct ieee80211_hdr *hdr;
 670         u16 fc;
 671         u64 cookie_val;
 672
 673         if (!cookie)
 674                 return;
 675
 676         cookie_val = nla_get_u64(cookie);
 677         wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s",
 678                    (long long unsigned int) cookie_val,
 679                    cookie_val == drv->send_action_cookie ?
 680                    " (match)" : " (unknown)");
 681         if (cookie_val != drv->send_action_cookie)
 682                 return;
 683
 684         hdr = (const struct ieee80211_hdr *) frame;
 685         fc = le_to_host16(hdr->frame_control);
 686
 687         os_memset(&event, 0, sizeof(event));
 688         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
 689         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
 690         event.tx_status.dst = hdr->addr1;
 691         event.tx_status.data = frame;
 692         event.tx_status.data_len = len;
 693         event.tx_status.ack = ack != NULL;
 694         wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
 695 }
 696
 697
 698 static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
 699                                        enum wpa_event_type type,
 700                                        const u8 *frame, size_t len)
 701 {
 702         const struct ieee80211_mgmt *mgmt;
 703         union wpa_event_data event;
 704         const u8 *bssid = NULL;
 705         u16 reason_code = 0;
 706
 707         drv->associated = 0;
 708         os_memset(&event, 0, sizeof(event));
 709
 710         mgmt = (const struct ieee80211_mgmt *) frame;
 711         if (len >= 24)
 712                 bssid = mgmt->bssid;
 713         /* Note: Same offset for Reason Code in both frame subtypes */
 714         if (len >= 24 + sizeof(mgmt->u.deauth))
 715                 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
 716
 717         if (type == EVENT_DISASSOC) {
 718                 event.disassoc_info.addr = bssid;
 719                 event.disassoc_info.reason_code = reason_code;
 720         } else {
 721                 event.deauth_info.addr = bssid;
 722                 event.deauth_info.reason_code = reason_code;
 723         }
 724
 725         wpa_supplicant_event(drv->ctx, type, &event);
 726 }
 727
 728
 729 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 730                        enum nl80211_commands cmd, struct nlattr *frame,
 731                        struct nlattr *addr, struct nlattr *timed_out,
 732                        struct nlattr *freq, struct nlattr *ack,
 733                        struct nlattr *cookie)
 734 {
 735         if (timed_out && addr) {
 736                 mlme_timeout_event(drv, cmd, addr);
 737                 return;
 738         }
 739
 740         if (frame == NULL) {
 741                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 742                            "data", cmd);
 743                 return;
 744         }
 745
 746         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 747         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 748                     nla_data(frame), nla_len(frame));
 749
 750         switch (cmd) {
 751         case NL80211_CMD_AUTHENTICATE:
 752                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 753                 break;
 754         case NL80211_CMD_ASSOCIATE:
 755                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 756                 break;
 757         case NL80211_CMD_DEAUTHENTICATE:
 758                 mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
 759                                            nla_data(frame), nla_len(frame));
 760                 break;
 761         case NL80211_CMD_DISASSOCIATE:
 762                 mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
 763                                            nla_data(frame), nla_len(frame));
 764                 break;
 765         case NL80211_CMD_ACTION:
 766                 mlme_event_action(drv, freq, nla_data(frame), nla_len(frame));
 767                 break;
 768         case NL80211_CMD_ACTION_TX_STATUS:
 769                 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
 770                                             nla_len(frame), ack);
 771                 break;
 772         default:
 773                 break;
 774         }
 775 }
 776
 777
 778 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 779                                            struct nlattr *tb[])
 780 {
 781         union wpa_event_data data;
 782
 783         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 784         os_memset(&data, 0, sizeof(data));
 785         if (tb[NL80211_ATTR_MAC]) {
 786                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 787                             nla_data(tb[NL80211_ATTR_MAC]),
 788                             nla_len(tb[NL80211_ATTR_MAC]));
 789                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 790         }
 791         if (tb[NL80211_ATTR_KEY_SEQ]) {
 792                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 793                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 794                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 795         }
 796         if (tb[NL80211_ATTR_KEY_TYPE]) {
 797                 enum nl80211_key_type key_type =
 798                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 799                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 800                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 801                         data.michael_mic_failure.unicast = 1;
 802         } else
 803                 data.michael_mic_failure.unicast = 1;
 804
 805         if (tb[NL80211_ATTR_KEY_IDX]) {
 806                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 807                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 808         }
 809
 810         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 811 }
 812
 813
 814 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 815                                  struct nlattr *tb[])
 816 {
 817         if (tb[NL80211_ATTR_MAC] == NULL) {
 818                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 819                            "event");
 820                 return;
 821         }
 822         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 823         drv->associated = 1;
 824         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 825                    MAC2STR(drv->bssid));
 826
 827         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 828 }
 829
 830
 831 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
 832                                          int cancel_event, struct nlattr *tb[])
 833 {
 834         unsigned int freq, chan_type, duration;
 835         union wpa_event_data data;
 836         u64 cookie;
 837
 838         if (tb[NL80211_ATTR_WIPHY_FREQ])
 839                 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 840         else
 841                 freq = 0;
 842
 843         if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
 844                 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 845         else
 846                 chan_type = 0;
 847
 848         if (tb[NL80211_ATTR_DURATION])
 849                 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
 850         else
 851                 duration = 0;
 852
 853         if (tb[NL80211_ATTR_COOKIE])
 854                 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
 855         else
 856                 cookie = 0;
 857
 858         wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
 859                    "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
 860                    cancel_event, freq, chan_type, duration,
 861                    (long long unsigned int) cookie,
 862                    cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
 863
 864         if (cookie != drv->remain_on_chan_cookie)
 865                 return; /* not for us */
 866
 867         drv->pending_remain_on_chan = !cancel_event;
 868
 869         os_memset(&data, 0, sizeof(data));
 870         data.remain_on_channel.freq = freq;
 871         data.remain_on_channel.duration = duration;
 872         wpa_supplicant_event(drv->ctx, cancel_event ?
 873                              EVENT_CANCEL_REMAIN_ON_CHANNEL :
 874                              EVENT_REMAIN_ON_CHANNEL, &data);
 875 }
 876
 877
 878 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 879                             struct nlattr *tb[])
 880 {
 881         union wpa_event_data event;
 882         struct nlattr *nl;
 883         int rem;
 884         struct scan_info *info;
 885 #define MAX_REPORT_FREQS 50
 886         int freqs[MAX_REPORT_FREQS];
 887         int num_freqs = 0;
 888
 889         os_memset(&event, 0, sizeof(event));
 890         info = &event.scan_info;
 891         info->aborted = aborted;
 892
 893         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 894                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
 895                         struct wpa_driver_scan_ssid *s =
 896                                 &info->ssids[info->num_ssids];
 897                         s->ssid = nla_data(nl);
 898                         s->ssid_len = nla_len(nl);
 899                         info->num_ssids++;
 900                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
 901                                 break;
 902                 }
 903         }
 904         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 905                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
 906                 {
 907                         freqs[num_freqs] = nla_get_u32(nl);
 908                         num_freqs++;
 909                         if (num_freqs == MAX_REPORT_FREQS - 1)
 910                                 break;
 911                 }
 912                 info->freqs = freqs;
 913                 info->num_freqs = num_freqs;
 914         }
 915         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
 916 }
 917
 918
 919 static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
 920                               struct nlattr *tb[])
 921 {
 922         static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
 923                 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
 924                 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
 925                 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
 926         };
 927         struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
 928         enum nl80211_cqm_rssi_threshold_event event;
 929         union wpa_event_data ed;
 930
 931         if (tb[NL80211_ATTR_CQM] == NULL ||
 932             nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
 933                              cqm_policy)) {
 934                 wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
 935                 return;
 936         }
 937
 938         if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
 939                 return;
 940         event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
 941
 942         os_memset(&ed, 0, sizeof(ed));
 943
 944         if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
 945                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
 946                            "event: RSSI high");
 947                 ed.signal_change.above_threshold = 1;
 948         } else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
 949                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
 950                            "event: RSSI low");
 951                 ed.signal_change.above_threshold = 0;
 952         } else
 953                 return;
 954
 955         wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
 956 }
 957
 958
 959 static int process_event(struct nl_msg *msg, void *arg)
 960 {
 961         struct wpa_driver_nl80211_data *drv = arg;
 962         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 963         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 964         union wpa_event_data data;
 965
 966         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 967                   genlmsg_attrlen(gnlh, 0), NULL);
 968
 969         if (tb[NL80211_ATTR_IFINDEX]) {
 970                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 971                 if (ifindex != drv->ifindex && !have_ifidx(drv, ifindex)) {
 972                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 973                                    " for foreign interface (ifindex %d)",
 974                                    gnlh->cmd, ifindex);
 975                         return NL_SKIP;
 976                 }
 977         }
 978
 979         if (drv->ap_scan_as_station &&
 980             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 981              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 982                 wpa_driver_nl80211_set_mode(&drv->first_bss,
 983                                             IEEE80211_MODE_AP);
 984                 drv->ap_scan_as_station = 0;
 985         }
 986
 987         switch (gnlh->cmd) {
 988         case NL80211_CMD_TRIGGER_SCAN:
 989                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 990                 break;
 991         case NL80211_CMD_NEW_SCAN_RESULTS:
 992                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 993                 drv->scan_complete_events = 1;
 994                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 995                                      drv->ctx);
 996                 send_scan_event(drv, 0, tb);
 997                 break;
 998         case NL80211_CMD_SCAN_ABORTED:
 999                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
1000                 /*
1001                  * Need to indicate that scan results are available in order
1002                  * not to make wpa_supplicant stop its scanning.
1003                  */
1004                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1005                                      drv->ctx);
1006                 send_scan_event(drv, 1, tb);
1007                 break;
1008         case NL80211_CMD_AUTHENTICATE:
1009         case NL80211_CMD_ASSOCIATE:
1010         case NL80211_CMD_DEAUTHENTICATE:
1011         case NL80211_CMD_DISASSOCIATE:
1012         case NL80211_CMD_ACTION:
1013         case NL80211_CMD_ACTION_TX_STATUS:
1014                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
1015                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
1016                            tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
1017                            tb[NL80211_ATTR_COOKIE]);
1018                 break;
1019         case NL80211_CMD_CONNECT:
1020         case NL80211_CMD_ROAM:
1021                 mlme_event_connect(drv, gnlh->cmd,
1022                                    tb[NL80211_ATTR_STATUS_CODE],
1023                                    tb[NL80211_ATTR_MAC],
1024                                    tb[NL80211_ATTR_REQ_IE],
1025                                    tb[NL80211_ATTR_RESP_IE]);
1026                 break;
1027         case NL80211_CMD_DISCONNECT:
1028                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1029                         /*
1030                          * Avoid reporting two disassociation events that could
1031                          * confuse the core code.
1032                          */
1033                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
1034                                    "event when using userspace SME");
1035                         break;
1036                 }
1037                 drv->associated = 0;
1038                 os_memset(&data, 0, sizeof(data));
1039                 if (tb[NL80211_ATTR_REASON_CODE])
1040                         data.disassoc_info.reason_code =
1041                                 nla_get_u16(tb[NL80211_ATTR_REASON_CODE]);
1042                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, &data);
1043                 break;
1044         case NL80211_CMD_MICHAEL_MIC_FAILURE:
1045                 mlme_event_michael_mic_failure(drv, tb);
1046                 break;
1047         case NL80211_CMD_JOIN_IBSS:
1048                 mlme_event_join_ibss(drv, tb);
1049                 break;
1050         case NL80211_CMD_REMAIN_ON_CHANNEL:
1051                 mlme_event_remain_on_channel(drv, 0, tb);
1052                 break;
1053         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
1054                 mlme_event_remain_on_channel(drv, 1, tb);
1055                 break;
1056         case NL80211_CMD_NOTIFY_CQM:
1057                 nl80211_cqm_event(drv, tb);
1058                 break;
1059         default:
1060                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1061                            "(cmd=%d)", gnlh->cmd);
1062                 break;
1063         }
1064
1065         return NL_SKIP;
1066 }
1067
1068
1069 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1070                                              void *sock_ctx)
1071 {
1072         struct nl_cb *cb;
1073         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1074
1075         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1076
1077         cb = nl_cb_clone(drv->nl_cb);
1078         if (!cb)
1079                 return;
1080         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1081         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1082         nl_recvmsgs(drv->nl_handle_event, cb);
1083         nl_cb_put(cb);
1084 }
1085
1086
1087 /**
1088  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1089  * @priv: driver_nl80211 private data
1090  * @alpha2_arg: country to which to switch to
1091  * Returns: 0 on success, -1 on failure
1092  *
1093  * This asks nl80211 to set the regulatory domain for given
1094  * country ISO / IEC alpha2.
1095  */
1096 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1097 {
1098         struct i802_bss *bss = priv;
1099         struct wpa_driver_nl80211_data *drv = bss->drv;
1100         char alpha2[3];
1101         struct nl_msg *msg;
1102
1103         msg = nlmsg_alloc();
1104         if (!msg)
1105                 return -ENOMEM;
1106
1107         alpha2[0] = alpha2_arg[0];
1108         alpha2[1] = alpha2_arg[1];
1109         alpha2[2] = '\0';
1110
1111         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1112                     0, NL80211_CMD_REQ_SET_REG, 0);
1113
1114         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1115         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1116                 return -EINVAL;
1117         return 0;
1118 nla_put_failure:
1119         return -EINVAL;
1120 }
1121
1122
1123 #ifndef HOSTAPD
1124 struct wiphy_info_data {
1125         int max_scan_ssids;
1126         int ap_supported;
1127         int auth_supported;
1128         int connect_supported;
1129 };
1130
1131
1132 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1133 {
1134         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1135         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1136         struct wiphy_info_data *info = arg;
1137
1138         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1139                   genlmsg_attrlen(gnlh, 0), NULL);
1140
1141         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1142                 info->max_scan_ssids =
1143                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1144
1145         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1146                 struct nlattr *nl_mode;
1147                 int i;
1148                 nla_for_each_nested(nl_mode,
1149                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1150                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1151                                 info->ap_supported = 1;
1152                                 break;
1153                         }
1154                 }
1155         }
1156
1157         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1158                 struct nlattr *nl_cmd;
1159                 int i;
1160
1161                 nla_for_each_nested(nl_cmd,
1162                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1163                         u32 cmd = nla_get_u32(nl_cmd);
1164                         if (cmd == NL80211_CMD_AUTHENTICATE)
1165                                 info->auth_supported = 1;
1166                         else if (cmd == NL80211_CMD_CONNECT)
1167                                 info->connect_supported = 1;
1168                 }
1169         }
1170
1171         return NL_SKIP;
1172 }
1173
1174
1175 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1176                                        struct wiphy_info_data *info)
1177 {
1178         struct nl_msg *msg;
1179
1180         os_memset(info, 0, sizeof(*info));
1181         msg = nlmsg_alloc();
1182         if (!msg)
1183                 return -1;
1184
1185         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1186                     0, NL80211_CMD_GET_WIPHY, 0);
1187
1188         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1189
1190         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1191                 return 0;
1192         msg = NULL;
1193 nla_put_failure:
1194         nlmsg_free(msg);
1195         return -1;
1196 }
1197
1198
1199 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1200 {
1201         struct wiphy_info_data info;
1202         if (wpa_driver_nl80211_get_info(drv, &info))
1203                 return -1;
1204         drv->has_capability = 1;
1205         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1206         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1207                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1208                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1209                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1210         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1211                 WPA_DRIVER_CAPA_ENC_WEP104 |
1212                 WPA_DRIVER_CAPA_ENC_TKIP |
1213                 WPA_DRIVER_CAPA_ENC_CCMP;
1214         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1215                 WPA_DRIVER_AUTH_SHARED |
1216                 WPA_DRIVER_AUTH_LEAP;
1217
1218         drv->capa.max_scan_ssids = info.max_scan_ssids;
1219         if (info.ap_supported)
1220                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1221
1222         if (info.auth_supported)
1223                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1224         else if (!info.connect_supported) {
1225                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1226                            "authentication/association or connect commands");
1227                 return -1;
1228         }
1229
1230         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1231         drv->capa.max_remain_on_chan = 5000;
1232
1233         return 0;
1234 }
1235 #endif /* HOSTAPD */
1236
1237
1238 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1239                                       void *ctx)
1240 {
1241         int ret;
1242
1243         /* Initialize generic netlink and nl80211 */
1244
1245         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1246         if (drv->nl_cb == NULL) {
1247                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1248                            "callbacks");
1249                 goto err1;
1250         }
1251
1252         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1253         if (drv->nl_handle == NULL) {
1254                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1255                            "callbacks");
1256                 goto err2;
1257         }
1258
1259         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1260         if (drv->nl_handle_event == NULL) {
1261                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1262                            "callbacks (event)");
1263                 goto err2b;
1264         }
1265
1266         if (genl_connect(drv->nl_handle)) {
1267                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1268                            "netlink");
1269                 goto err3;
1270         }
1271
1272         if (genl_connect(drv->nl_handle_event)) {
1273                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1274                            "netlink (event)");
1275                 goto err3;
1276         }
1277
1278 #ifdef CONFIG_LIBNL20
1279         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1280                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1281                            "netlink cache");
1282                 goto err3;
1283         }
1284         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1285             0) {
1286                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1287                            "netlink cache (event)");
1288                 goto err3b;
1289         }
1290 #else /* CONFIG_LIBNL20 */
1291         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1292         if (drv->nl_cache == NULL) {
1293                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1294                            "netlink cache");
1295                 goto err3;
1296         }
1297         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1298         if (drv->nl_cache_event == NULL) {
1299                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1300                            "netlink cache (event)");
1301                 goto err3b;
1302         }
1303 #endif /* CONFIG_LIBNL20 */
1304
1305         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1306         if (drv->nl80211 == NULL) {
1307                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1308                            "found");
1309                 goto err4;
1310         }
1311
1312         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1313         if (ret >= 0)
1314                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1315         if (ret < 0) {
1316                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1317                            "membership for scan events: %d (%s)",
1318                            ret, strerror(-ret));
1319                 goto err4;
1320         }
1321
1322         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1323         if (ret >= 0)
1324                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1325         if (ret < 0) {
1326                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1327                            "membership for mlme events: %d (%s)",
1328                            ret, strerror(-ret));
1329                 goto err4;
1330         }
1331
1332         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1333                                  wpa_driver_nl80211_event_receive, drv, ctx);
1334
1335         return 0;
1336
1337 err4:
1338         nl_cache_free(drv->nl_cache_event);
1339 err3b:
1340         nl_cache_free(drv->nl_cache);
1341 err3:
1342         nl_handle_destroy(drv->nl_handle_event);
1343 err2b:
1344         nl_handle_destroy(drv->nl_handle);
1345 err2:
1346         nl_cb_put(drv->nl_cb);
1347 err1:
1348         return -1;
1349 }
1350
1351
1352 static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
1353 {
1354         struct wpa_driver_nl80211_data *drv = ctx;
1355         wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");
1356         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
1357 }
1358
1359
1360 static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
1361 {
1362         struct wpa_driver_nl80211_data *drv = ctx;
1363         wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
1364         if (linux_set_iface_flags(drv->ioctl_sock, drv->first_bss.ifname, 1)) {
1365                 wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
1366                            "after rfkill unblock");
1367                 return;
1368         }
1369         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
1370 }
1371
1372
1373 /**
1374  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1375  * @ctx: context to be used when calling wpa_supplicant functions,
1376  * e.g., wpa_supplicant_event()
1377  * @ifname: interface name, e.g., wlan0
1378  * Returns: Pointer to private data, %NULL on failure
1379  */
1380 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1381 {
1382         struct wpa_driver_nl80211_data *drv;
1383         struct netlink_config *cfg;
1384         struct rfkill_config *rcfg;
1385         struct i802_bss *bss;
1386
1387         drv = os_zalloc(sizeof(*drv));
1388         if (drv == NULL)
1389                 return NULL;
1390         drv->ctx = ctx;
1391         bss = &drv->first_bss;
1392         bss->drv = drv;
1393         os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
1394         drv->monitor_ifidx = -1;
1395         drv->monitor_sock = -1;
1396         drv->ioctl_sock = -1;
1397
1398         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1399                 os_free(drv);
1400                 return NULL;
1401         }
1402
1403         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1404         if (drv->ioctl_sock < 0) {
1405                 perror("socket(PF_INET,SOCK_DGRAM)");
1406                 goto failed;
1407         }
1408
1409         cfg = os_zalloc(sizeof(*cfg));
1410         if (cfg == NULL)
1411                 goto failed;
1412         cfg->ctx = drv;
1413         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1414         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1415         drv->netlink = netlink_init(cfg);
1416         if (drv->netlink == NULL) {
1417                 os_free(cfg);
1418                 goto failed;
1419         }
1420
1421         rcfg = os_zalloc(sizeof(*rcfg));
1422         if (rcfg == NULL)
1423                 goto failed;
1424         rcfg->ctx = drv;
1425         os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
1426         rcfg->blocked_cb = wpa_driver_nl80211_rfkill_blocked;
1427         rcfg->unblocked_cb = wpa_driver_nl80211_rfkill_unblocked;
1428         drv->rfkill = rfkill_init(rcfg);
1429         if (drv->rfkill == NULL)
1430                 wpa_printf(MSG_DEBUG, "nl80211: RFKILL status not available");
1431
1432         if (wpa_driver_nl80211_finish_drv_init(drv))
1433                 goto failed;
1434
1435         return bss;
1436
1437 failed:
1438         rfkill_deinit(drv->rfkill);
1439         netlink_deinit(drv->netlink);
1440         if (drv->ioctl_sock >= 0)
1441                 close(drv->ioctl_sock);
1442
1443         genl_family_put(drv->nl80211);
1444         nl_cache_free(drv->nl_cache);
1445         nl_handle_destroy(drv->nl_handle);
1446         nl_cb_put(drv->nl_cb);
1447         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1448
1449         os_free(drv);
1450         return NULL;
1451 }
1452
1453
1454 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1455                                          const u8 *match, size_t match_len)
1456 {
1457         struct nl_msg *msg;
1458         int ret = -1;
1459
1460         msg = nlmsg_alloc();
1461         if (!msg)
1462                 return -1;
1463
1464         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1465                     NL80211_CMD_REGISTER_ACTION, 0);
1466
1467         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1468         NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1469
1470         ret = send_and_recv(drv, drv->nl_handle_event, msg, NULL, NULL);
1471         msg = NULL;
1472         if (ret) {
1473                 wpa_printf(MSG_DEBUG, "nl80211: Register Action command "
1474                            "failed: ret=%d (%s)", ret, strerror(-ret));
1475                 wpa_hexdump(MSG_DEBUG, "nl80211: Register Action match",
1476                             match, match_len);
1477                 goto nla_put_failure;
1478         }
1479         ret = 0;
1480 nla_put_failure:
1481         nlmsg_free(msg);
1482         return ret;
1483 }
1484
1485
1486 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1487 {
1488         /* FT Action frames */
1489         if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
1490                 return -1;
1491         else
1492                 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
1493                         WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
1494
1495         return 0;
1496 }
1497
1498
1499 static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
1500 {
1501         wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
1502 }
1503
1504
1505 static int
1506 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1507 {
1508         struct i802_bss *bss = &drv->first_bss;
1509         int send_rfkill_event = 0;
1510
1511         drv->ifindex = if_nametoindex(bss->ifname);
1512         drv->first_bss.ifindex = drv->ifindex;
1513
1514 #ifndef HOSTAPD
1515         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
1516                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1517                            "use managed mode");
1518         }
1519
1520         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
1521                 if (rfkill_is_blocked(drv->rfkill)) {
1522                         wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
1523                                    "interface '%s' due to rfkill",
1524                                    bss->ifname);
1525                         send_rfkill_event = 1;
1526                 } else {
1527                         wpa_printf(MSG_ERROR, "nl80211: Could not set "
1528                                    "interface '%s' UP", bss->ifname);
1529                         return -1;
1530                 }
1531         }
1532
1533         if (wpa_driver_nl80211_capa(drv))
1534                 return -1;
1535
1536         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1537                                1, IF_OPER_DORMANT);
1538 #endif /* HOSTAPD */
1539
1540         if (nl80211_register_action_frames(drv) < 0) {
1541                 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
1542                            "frame processing - ignore for now");
1543                 /*
1544                  * Older kernel versions did not support this, so ignore the
1545                  * error for now. Some functionality may not be available
1546                  * because of this.
1547                  */
1548         }
1549
1550         if (send_rfkill_event) {
1551                 eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
1552                                        drv, drv->ctx);
1553         }
1554
1555         return 0;
1556 }
1557
1558
1559 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1560 {
1561         struct nl_msg *msg;
1562
1563         msg = nlmsg_alloc();
1564         if (!msg)
1565                 return -ENOMEM;
1566
1567         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1568                     0, NL80211_CMD_DEL_BEACON, 0);
1569         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1570
1571         return send_and_recv_msgs(drv, msg, NULL, NULL);
1572  nla_put_failure:
1573         return -ENOBUFS;
1574 }
1575
1576
1577 /**
1578  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1579  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1580  *
1581  * Shut down driver interface and processing of driver events. Free
1582  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1583  */
1584 static void wpa_driver_nl80211_deinit(void *priv)
1585 {
1586         struct i802_bss *bss = priv;
1587         struct wpa_driver_nl80211_data *drv = bss->drv;
1588
1589         if (drv->added_if_into_bridge) {
1590                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
1591                     < 0)
1592                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1593                                    "interface %s from bridge %s: %s",
1594                                    bss->ifname, drv->brname, strerror(errno));
1595         }
1596         if (drv->added_bridge) {
1597                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1598                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1599                                    "bridge %s: %s",
1600                                    drv->brname, strerror(errno));
1601         }
1602
1603         nl80211_remove_monitor_interface(drv);
1604
1605         if (drv->nlmode == NL80211_IFTYPE_AP)
1606                 wpa_driver_nl80211_del_beacon(drv);
1607
1608 #ifdef HOSTAPD
1609         if (drv->last_freq_ht) {
1610                 /* Clear HT flags from the driver */
1611                 struct hostapd_freq_params freq;
1612                 os_memset(&freq, 0, sizeof(freq));
1613                 freq.freq = drv->last_freq;
1614                 i802_set_freq(priv, &freq);
1615         }
1616
1617         if (drv->eapol_sock >= 0) {
1618                 eloop_unregister_read_sock(drv->eapol_sock);
1619                 close(drv->eapol_sock);
1620         }
1621
1622         if (drv->if_indices != drv->default_if_indices)
1623                 os_free(drv->if_indices);
1624 #endif /* HOSTAPD */
1625
1626         if (drv->disable_11b_rates)
1627                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1628
1629         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1630         netlink_deinit(drv->netlink);
1631         rfkill_deinit(drv->rfkill);
1632
1633         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1634
1635         (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
1636         wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
1637
1638         if (drv->ioctl_sock >= 0)
1639                 close(drv->ioctl_sock);
1640
1641         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1642         genl_family_put(drv->nl80211);
1643         nl_cache_free(drv->nl_cache);
1644         nl_cache_free(drv->nl_cache_event);
1645         nl_handle_destroy(drv->nl_handle);
1646         nl_handle_destroy(drv->nl_handle_event);
1647         nl_cb_put(drv->nl_cb);
1648
1649         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1650                              drv, NULL);
1651
1652         os_free(drv->filter_ssids);
1653
1654         os_free(drv);
1655 }
1656
1657
1658 /**
1659  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1660  * @eloop_ctx: Driver private data
1661  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1662  *
1663  * This function can be used as registered timeout when starting a scan to
1664  * generate a scan completed event if the driver does not report this.
1665  */
1666 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1667 {
1668         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1669         if (drv->ap_scan_as_station) {
1670                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1671                                             IEEE80211_MODE_AP);
1672                 drv->ap_scan_as_station = 0;
1673         }
1674         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1675         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1676 }
1677
1678
1679 /**
1680  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1681  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1682  * @params: Scan parameters
1683  * Returns: 0 on success, -1 on failure
1684  */
1685 static int wpa_driver_nl80211_scan(void *priv,
1686                                    struct wpa_driver_scan_params *params)
1687 {
1688         struct i802_bss *bss = priv;
1689         struct wpa_driver_nl80211_data *drv = bss->drv;
1690         int ret = 0, timeout;
1691         struct nl_msg *msg, *ssids, *freqs;
1692         size_t i;
1693
1694         msg = nlmsg_alloc();
1695         ssids = nlmsg_alloc();
1696         freqs = nlmsg_alloc();
1697         if (!msg || !ssids || !freqs) {
1698                 nlmsg_free(msg);
1699                 nlmsg_free(ssids);
1700                 nlmsg_free(freqs);
1701                 return -1;
1702         }
1703
1704         os_free(drv->filter_ssids);
1705         drv->filter_ssids = params->filter_ssids;
1706         params->filter_ssids = NULL;
1707         drv->num_filter_ssids = params->num_filter_ssids;
1708
1709         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1710                     NL80211_CMD_TRIGGER_SCAN, 0);
1711
1712         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1713
1714         for (i = 0; i < params->num_ssids; i++) {
1715                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
1716                                   params->ssids[i].ssid,
1717                                   params->ssids[i].ssid_len);
1718                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1719                         params->ssids[i].ssid);
1720         }
1721         if (params->num_ssids)
1722                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1723
1724         if (params->extra_ies) {
1725                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
1726                                   params->extra_ies, params->extra_ies_len);
1727                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1728                         params->extra_ies);
1729         }
1730
1731         if (params->freqs) {
1732                 for (i = 0; params->freqs[i]; i++) {
1733                         wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
1734                                    "MHz", params->freqs[i]);
1735                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1736                 }
1737                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1738         }
1739
1740         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1741         msg = NULL;
1742         if (ret) {
1743                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1744                            "(%s)", ret, strerror(-ret));
1745 #ifdef HOSTAPD
1746                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1747                         /*
1748                          * mac80211 does not allow scan requests in AP mode, so
1749                          * try to do this in station mode.
1750                          */
1751                         if (wpa_driver_nl80211_set_mode(bss,
1752                                                         IEEE80211_MODE_INFRA))
1753                                 goto nla_put_failure;
1754
1755                         if (wpa_driver_nl80211_scan(drv, params)) {
1756                                 wpa_driver_nl80211_set_mode(bss,
1757                                                             IEEE80211_MODE_AP);
1758                                 goto nla_put_failure;
1759                         }
1760
1761                         /* Restore AP mode when processing scan results */
1762                         drv->ap_scan_as_station = 1;
1763                         ret = 0;
1764                 } else
1765                         goto nla_put_failure;
1766 #else /* HOSTAPD */
1767                 goto nla_put_failure;
1768 #endif /* HOSTAPD */
1769         }
1770
1771         /* Not all drivers generate "scan completed" wireless event, so try to
1772          * read results after a timeout. */
1773         timeout = 10;
1774         if (drv->scan_complete_events) {
1775                 /*
1776                  * The driver seems to deliver events to notify when scan is
1777                  * complete, so use longer timeout to avoid race conditions
1778                  * with scanning and following association request.
1779                  */
1780                 timeout = 30;
1781         }
1782         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1783                    "seconds", ret, timeout);
1784         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1785         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1786                                drv, drv->ctx);
1787
1788 nla_put_failure:
1789         nlmsg_free(ssids);
1790         nlmsg_free(msg);
1791         nlmsg_free(freqs);
1792         return ret;
1793 }
1794
1795
1796 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
1797 {
1798         const u8 *end, *pos;
1799
1800         if (ies == NULL)
1801                 return NULL;
1802
1803         pos = ies;
1804         end = ies + ies_len;
1805
1806         while (pos + 1 < end) {
1807                 if (pos + 2 + pos[1] > end)
1808                         break;
1809                 if (pos[0] == ie)
1810                         return pos;
1811                 pos += 2 + pos[1];
1812         }
1813
1814         return NULL;
1815 }
1816
1817
1818 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
1819                                  const u8 *ie, size_t ie_len)
1820 {
1821         const u8 *ssid;
1822         size_t i;
1823
1824         if (drv->filter_ssids == NULL)
1825                 return 0;
1826
1827         ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
1828         if (ssid == NULL)
1829                 return 1;
1830
1831         for (i = 0; i < drv->num_filter_ssids; i++) {
1832                 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
1833                     os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
1834                     0)
1835                         return 0;
1836         }
1837
1838         return 1;
1839 }
1840
1841
1842 struct nl80211_bss_info_arg {
1843         struct wpa_driver_nl80211_data *drv;
1844         struct wpa_scan_results *res;
1845 };
1846
1847 static int bss_info_handler(struct nl_msg *msg, void *arg)
1848 {
1849         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1850         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1851         struct nlattr *bss[NL80211_BSS_MAX + 1];
1852         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1853                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1854                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1855                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1856                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1857                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1858                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1859                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1860                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1861                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1862                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1863                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
1864         };
1865         struct nl80211_bss_info_arg *_arg = arg;
1866         struct wpa_scan_results *res = _arg->res;
1867         struct wpa_scan_res **tmp;
1868         struct wpa_scan_res *r;
1869         const u8 *ie, *beacon_ie;
1870         size_t ie_len, beacon_ie_len;
1871         u8 *pos;
1872
1873         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1874                   genlmsg_attrlen(gnlh, 0), NULL);
1875         if (!tb[NL80211_ATTR_BSS])
1876                 return NL_SKIP;
1877         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1878                              bss_policy))
1879                 return NL_SKIP;
1880         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1881                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1882                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1883         } else {
1884                 ie = NULL;
1885                 ie_len = 0;
1886         }
1887         if (bss[NL80211_BSS_BEACON_IES]) {
1888                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
1889                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
1890         } else {
1891                 beacon_ie = NULL;
1892                 beacon_ie_len = 0;
1893         }
1894
1895         if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
1896                                   ie ? ie_len : beacon_ie_len))
1897                 return NL_SKIP;
1898
1899         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
1900         if (r == NULL)
1901                 return NL_SKIP;
1902         if (bss[NL80211_BSS_BSSID])
1903                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1904                           ETH_ALEN);
1905         if (bss[NL80211_BSS_FREQUENCY])
1906                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1907         if (bss[NL80211_BSS_BEACON_INTERVAL])
1908                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1909         if (bss[NL80211_BSS_CAPABILITY])
1910                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1911         r->flags |= WPA_SCAN_NOISE_INVALID;
1912         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1913                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1914                 r->level /= 100; /* mBm to dBm */
1915                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1916         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1917                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1918                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1919         } else
1920                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1921         if (bss[NL80211_BSS_TSF])
1922                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1923         if (bss[NL80211_BSS_SEEN_MS_AGO])
1924                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1925         r->ie_len = ie_len;
1926         pos = (u8 *) (r + 1);
1927         if (ie) {
1928                 os_memcpy(pos, ie, ie_len);
1929                 pos += ie_len;
1930         }
1931         r->beacon_ie_len = beacon_ie_len;
1932         if (beacon_ie)
1933                 os_memcpy(pos, beacon_ie, beacon_ie_len);
1934
1935         if (bss[NL80211_BSS_STATUS]) {
1936                 enum nl80211_bss_status status;
1937                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1938                 switch (status) {
1939                 case NL80211_BSS_STATUS_AUTHENTICATED:
1940                         r->flags |= WPA_SCAN_AUTHENTICATED;
1941                         break;
1942                 case NL80211_BSS_STATUS_ASSOCIATED:
1943                         r->flags |= WPA_SCAN_ASSOCIATED;
1944                         break;
1945                 default:
1946                         break;
1947                 }
1948         }
1949
1950         tmp = os_realloc(res->res,
1951                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1952         if (tmp == NULL) {
1953                 os_free(r);
1954                 return NL_SKIP;
1955         }
1956         tmp[res->num++] = r;
1957         res->res = tmp;
1958
1959         return NL_SKIP;
1960 }
1961
1962
1963 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1964                                  const u8 *addr)
1965 {
1966         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1967                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1968                            "mismatch (" MACSTR ")", MAC2STR(addr));
1969                 wpa_driver_nl80211_mlme(drv, addr,
1970                                         NL80211_CMD_DEAUTHENTICATE,
1971                                         WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
1972         }
1973 }
1974
1975
1976 static void wpa_driver_nl80211_check_bss_status(
1977         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1978 {
1979         size_t i;
1980
1981         for (i = 0; i < res->num; i++) {
1982                 struct wpa_scan_res *r = res->res[i];
1983                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1984                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1985                                    "indicates BSS status with " MACSTR
1986                                    " as authenticated",
1987                                    MAC2STR(r->bssid));
1988                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1989                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1990                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1991                             0) {
1992                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1993                                            " in local state (auth=" MACSTR
1994                                            " assoc=" MACSTR ")",
1995                                            MAC2STR(drv->auth_bssid),
1996                                            MAC2STR(drv->bssid));
1997                                 clear_state_mismatch(drv, r->bssid);
1998                         }
1999                 }
2000
2001                 if (r->flags & WPA_SCAN_ASSOCIATED) {
2002                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2003                                    "indicate BSS status with " MACSTR
2004                                    " as associated",
2005                                    MAC2STR(r->bssid));
2006                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2007                             !drv->associated) {
2008                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2009                                            "(not associated) does not match "
2010                                            "with BSS state");
2011                                 clear_state_mismatch(drv, r->bssid);
2012                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
2013                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
2014                                    0) {
2015                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2016                                            "(associated with " MACSTR ") does "
2017                                            "not match with BSS state",
2018                                            MAC2STR(drv->bssid));
2019                                 clear_state_mismatch(drv, r->bssid);
2020                                 clear_state_mismatch(drv, drv->bssid);
2021                         }
2022                 }
2023         }
2024 }
2025
2026
2027 static void wpa_scan_results_free(struct wpa_scan_results *res)
2028 {
2029         size_t i;
2030
2031         if (res == NULL)
2032                 return;
2033
2034         for (i = 0; i < res->num; i++)
2035                 os_free(res->res[i]);
2036         os_free(res->res);
2037         os_free(res);
2038 }
2039
2040
2041 static struct wpa_scan_results *
2042 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
2043 {
2044         struct nl_msg *msg;
2045         struct wpa_scan_results *res;
2046         int ret;
2047         struct nl80211_bss_info_arg arg;
2048
2049         res = os_zalloc(sizeof(*res));
2050         if (res == NULL)
2051                 return NULL;
2052         msg = nlmsg_alloc();
2053         if (!msg)
2054                 goto nla_put_failure;
2055
2056         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
2057                     NL80211_CMD_GET_SCAN, 0);
2058         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2059
2060         arg.drv = drv;
2061         arg.res = res;
2062         ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
2063         msg = NULL;
2064         if (ret == 0) {
2065                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
2066                            (unsigned long) res->num);
2067                 return res;
2068         }
2069         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
2070                    "(%s)", ret, strerror(-ret));
2071 nla_put_failure:
2072         nlmsg_free(msg);
2073         wpa_scan_results_free(res);
2074         return NULL;
2075 }
2076
2077
2078 /**
2079  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
2080  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2081  * Returns: Scan results on success, -1 on failure
2082  */
2083 static struct wpa_scan_results *
2084 wpa_driver_nl80211_get_scan_results(void *priv)
2085 {
2086         struct i802_bss *bss = priv;
2087         struct wpa_driver_nl80211_data *drv = bss->drv;
2088         struct wpa_scan_results *res;
2089
2090         res = nl80211_get_scan_results(drv);
2091         if (res)
2092                 wpa_driver_nl80211_check_bss_status(drv, res);
2093         return res;
2094 }
2095
2096
2097 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
2098 {
2099         struct wpa_scan_results *res;
2100         size_t i;
2101
2102         res = nl80211_get_scan_results(drv);
2103         if (res == NULL) {
2104                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
2105                 return;
2106         }
2107
2108         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
2109         for (i = 0; i < res->num; i++) {
2110                 struct wpa_scan_res *r = res->res[i];
2111                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
2112                            (int) i, (int) res->num, MAC2STR(r->bssid),
2113                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
2114                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
2115         }
2116
2117         wpa_scan_results_free(res);
2118 }
2119
2120
2121 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
2122                                       enum wpa_alg alg, const u8 *addr,
2123                                       int key_idx, int set_tx,
2124                                       const u8 *seq, size_t seq_len,
2125                                       const u8 *key, size_t key_len)
2126 {
2127         struct i802_bss *bss = priv;
2128         struct wpa_driver_nl80211_data *drv = bss->drv;
2129         int ifindex = if_nametoindex(ifname);
2130         struct nl_msg *msg;
2131         int ret;
2132
2133         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
2134                    "set_tx=%d seq_len=%lu key_len=%lu",
2135                    __func__, ifindex, alg, addr, key_idx, set_tx,
2136                    (unsigned long) seq_len, (unsigned long) key_len);
2137
2138         msg = nlmsg_alloc();
2139         if (!msg)
2140                 return -ENOMEM;
2141
2142         if (alg == WPA_ALG_NONE) {
2143                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2144                             0, NL80211_CMD_DEL_KEY, 0);
2145         } else {
2146                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2147                             0, NL80211_CMD_NEW_KEY, 0);
2148                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2149                 switch (alg) {
2150                 case WPA_ALG_WEP:
2151                         if (key_len == 5)
2152                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2153                                             WLAN_CIPHER_SUITE_WEP40);
2154                         else
2155                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2156                                             WLAN_CIPHER_SUITE_WEP104);
2157                         break;
2158                 case WPA_ALG_TKIP:
2159                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2160                                     WLAN_CIPHER_SUITE_TKIP);
2161                         break;
2162                 case WPA_ALG_CCMP:
2163                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2164                                     WLAN_CIPHER_SUITE_CCMP);
2165                         break;
2166                 case WPA_ALG_IGTK:
2167                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2168                                     WLAN_CIPHER_SUITE_AES_CMAC);
2169                         break;
2170                 default:
2171                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2172                                    "algorithm %d", __func__, alg);
2173                         nlmsg_free(msg);
2174                         return -1;
2175                 }
2176         }
2177
2178         if (seq && seq_len)
2179                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
2180
2181         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2182         {
2183                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
2184                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2185         }
2186         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2187         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2188
2189         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2190         if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
2191                 ret = 0;
2192         if (ret)
2193                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2194                            ret, strerror(-ret));
2195
2196         /*
2197          * If we failed or don't need to set the default TX key (below),
2198          * we're done here.
2199          */
2200         if (ret || !set_tx || alg == WPA_ALG_NONE)
2201                 return ret;
2202 #ifdef HOSTAPD
2203         if (addr)
2204                 return ret;
2205 #else /* HOSTAPD */
2206         if (drv->nlmode == NL80211_IFTYPE_AP && addr)
2207                 return ret;
2208 #endif /* HOSTAPD */
2209
2210         msg = nlmsg_alloc();
2211         if (!msg)
2212                 return -ENOMEM;
2213
2214         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2215                     0, NL80211_CMD_SET_KEY, 0);
2216         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2217         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2218         if (alg == WPA_ALG_IGTK)
2219                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2220         else
2221                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2222
2223         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2224         if (ret == -ENOENT)
2225                 ret = 0;
2226         if (ret)
2227                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2228                            "err=%d %s)", ret, strerror(-ret));
2229         return ret;
2230
2231 nla_put_failure:
2232         return -ENOBUFS;
2233 }
2234
2235
2236 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2237                       int key_idx, int defkey,
2238                       const u8 *seq, size_t seq_len,
2239                       const u8 *key, size_t key_len)
2240 {
2241         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2242         if (!key_attr)
2243                 return -1;
2244
2245         if (defkey && alg == WPA_ALG_IGTK)
2246                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2247         else if (defkey)
2248                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2249
2250         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2251
2252         switch (alg) {
2253         case WPA_ALG_WEP:
2254                 if (key_len == 5)
2255                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2256                                     WLAN_CIPHER_SUITE_WEP40);
2257                 else
2258                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2259                                     WLAN_CIPHER_SUITE_WEP104);
2260                 break;
2261         case WPA_ALG_TKIP:
2262                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2263                 break;
2264         case WPA_ALG_CCMP:
2265                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2266                 break;
2267         case WPA_ALG_IGTK:
2268                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2269                             WLAN_CIPHER_SUITE_AES_CMAC);
2270                 break;
2271         default:
2272                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2273                            "algorithm %d", __func__, alg);
2274                 return -1;
2275         }
2276
2277         if (seq && seq_len)
2278                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2279
2280         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2281
2282         nla_nest_end(msg, key_attr);
2283
2284         return 0;
2285  nla_put_failure:
2286         return -1;
2287 }
2288
2289
2290 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2291                                  struct nl_msg *msg)
2292 {
2293         int i, privacy = 0;
2294         struct nlattr *nl_keys, *nl_key;
2295
2296         for (i = 0; i < 4; i++) {
2297                 if (!params->wep_key[i])
2298                         continue;
2299                 privacy = 1;
2300                 break;
2301         }
2302         if (!privacy)
2303                 return 0;
2304
2305         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2306
2307         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2308         if (!nl_keys)
2309                 goto nla_put_failure;
2310
2311         for (i = 0; i < 4; i++) {
2312                 if (!params->wep_key[i])
2313                         continue;
2314
2315                 nl_key = nla_nest_start(msg, i);
2316                 if (!nl_key)
2317                         goto nla_put_failure;
2318
2319                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2320                         params->wep_key[i]);
2321                 if (params->wep_key_len[i] == 5)
2322                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2323                                     WLAN_CIPHER_SUITE_WEP40);
2324                 else
2325                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2326                                     WLAN_CIPHER_SUITE_WEP104);
2327
2328                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2329
2330                 if (i == params->wep_tx_keyidx)
2331                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2332
2333                 nla_nest_end(msg, nl_key);
2334         }
2335         nla_nest_end(msg, nl_keys);
2336
2337         return 0;
2338
2339 nla_put_failure:
2340         return -ENOBUFS;
2341 }
2342
2343
2344 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2345                                    const u8 *addr, int cmd, u16 reason_code,
2346                                    int local_state_change)
2347 {
2348         int ret = -1;
2349         struct nl_msg *msg;
2350
2351         msg = nlmsg_alloc();
2352         if (!msg)
2353                 return -1;
2354
2355         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2356
2357         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2358         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2359         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2360         if (local_state_change)
2361                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2362
2363         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2364         msg = NULL;
2365         if (ret) {
2366                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2367                            "(%s)", ret, strerror(-ret));
2368                 goto nla_put_failure;
2369         }
2370         ret = 0;
2371
2372 nla_put_failure:
2373         nlmsg_free(msg);
2374         return ret;
2375 }
2376
2377
2378 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2379                                          const u8 *addr, int reason_code)
2380 {
2381         wpa_printf(MSG_DEBUG, "%s", __func__);
2382         drv->associated = 0;
2383         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2384                                        reason_code, 0);
2385 }
2386
2387
2388 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2389                                              int reason_code)
2390 {
2391         struct i802_bss *bss = priv;
2392         struct wpa_driver_nl80211_data *drv = bss->drv;
2393         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2394                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2395         wpa_printf(MSG_DEBUG, "%s", __func__);
2396         drv->associated = 0;
2397         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2398                                        reason_code, 0);
2399 }
2400
2401
2402 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2403                                            int reason_code)
2404 {
2405         struct i802_bss *bss = priv;
2406         struct wpa_driver_nl80211_data *drv = bss->drv;
2407         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2408                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2409         wpa_printf(MSG_DEBUG, "%s", __func__);
2410         drv->associated = 0;
2411         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2412                                        reason_code, 0);
2413 }
2414
2415
2416 static int wpa_driver_nl80211_authenticate(
2417         void *priv, struct wpa_driver_auth_params *params)
2418 {
2419         struct i802_bss *bss = priv;
2420         struct wpa_driver_nl80211_data *drv = bss->drv;
2421         int ret = -1, i;
2422         struct nl_msg *msg;
2423         enum nl80211_auth_type type;
2424         int count = 0;
2425
2426         drv->associated = 0;
2427         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2428         /* FIX: IBSS mode */
2429         if (drv->nlmode != NL80211_IFTYPE_STATION)
2430                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2431
2432         if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2433                 return -1;
2434
2435 retry:
2436         msg = nlmsg_alloc();
2437         if (!msg)
2438                 return -1;
2439
2440         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2441                    drv->ifindex);
2442
2443         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2444                     NL80211_CMD_AUTHENTICATE, 0);
2445
2446         for (i = 0; i < 4; i++) {
2447                 if (!params->wep_key[i])
2448                         continue;
2449                 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
2450                                            NULL, i,
2451                                            i == params->wep_tx_keyidx, NULL, 0,
2452                                            params->wep_key[i],
2453                                            params->wep_key_len[i]);
2454                 if (params->wep_tx_keyidx != i)
2455                         continue;
2456                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2457                                params->wep_key[i], params->wep_key_len[i])) {
2458                         nlmsg_free(msg);
2459                         return -1;
2460                 }
2461         }
2462
2463         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2464         if (params->bssid) {
2465                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2466                            MAC2STR(params->bssid));
2467                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2468         }
2469         if (params->freq) {
2470                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2471                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2472         }
2473         if (params->ssid) {
2474                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2475                                   params->ssid, params->ssid_len);
2476                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2477                         params->ssid);
2478         }
2479         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2480         if (params->ie)
2481                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2482         /*
2483          * TODO: if multiple auth_alg options enabled, try them one by one if
2484          * the AP rejects authentication due to unknown auth alg
2485          */
2486         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2487                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2488         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2489                 type = NL80211_AUTHTYPE_SHARED_KEY;
2490         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2491                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2492         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2493                 type = NL80211_AUTHTYPE_FT;
2494         else
2495                 goto nla_put_failure;
2496         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2497         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2498         if (params->local_state_change) {
2499                 wpa_printf(MSG_DEBUG, "  * Local state change only");
2500                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2501         }
2502
2503         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2504         msg = NULL;
2505         if (ret) {
2506                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2507                            "(%s)", ret, strerror(-ret));
2508                 count++;
2509                 if (ret == -EALREADY && count == 1 && params->bssid &&
2510                     !params->local_state_change) {
2511                         /*
2512                          * mac80211 does not currently accept new
2513                          * authentication if we are already authenticated. As a
2514                          * workaround, force deauthentication and try again.
2515                          */
2516                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2517                                    "after forced deauthentication");
2518                         wpa_driver_nl80211_deauthenticate(
2519                                 bss, params->bssid,
2520                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2521                         nlmsg_free(msg);
2522                         goto retry;
2523                 }
2524                 goto nla_put_failure;
2525         }
2526         ret = 0;
2527         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2528                    "successfully");
2529
2530 nla_put_failure:
2531         nlmsg_free(msg);
2532         return ret;
2533 }
2534
2535
2536 struct phy_info_arg {
2537         u16 *num_modes;
2538         struct hostapd_hw_modes *modes;
2539 };
2540
2541 static int phy_info_handler(struct nl_msg *msg, void *arg)
2542 {
2543         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2544         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2545         struct phy_info_arg *phy_info = arg;
2546
2547         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2548
2549         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2550         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2551                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2552                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2553                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2554                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2555                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2556                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2557         };
2558
2559         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2560         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2561                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2562                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2563         };
2564
2565         struct nlattr *nl_band;
2566         struct nlattr *nl_freq;
2567         struct nlattr *nl_rate;
2568         int rem_band, rem_freq, rem_rate;
2569         struct hostapd_hw_modes *mode;
2570         int idx, mode_is_set;
2571
2572         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2573                   genlmsg_attrlen(gnlh, 0), NULL);
2574
2575         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2576                 return NL_SKIP;
2577
2578         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2579                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2580                 if (!mode)
2581                         return NL_SKIP;
2582                 phy_info->modes = mode;
2583
2584                 mode_is_set = 0;
2585
2586                 mode = &phy_info->modes[*(phy_info->num_modes)];
2587                 memset(mode, 0, sizeof(*mode));
2588                 *(phy_info->num_modes) += 1;
2589
2590                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2591                           nla_len(nl_band), NULL);
2592
2593                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2594                         mode->ht_capab = nla_get_u16(
2595                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2596                 }
2597
2598                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2599                         mode->a_mpdu_params |= nla_get_u8(
2600                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2601                                 0x03;
2602                 }
2603
2604                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2605                         mode->a_mpdu_params |= nla_get_u8(
2606                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2607                                 2;
2608                 }
2609
2610                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2611                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2612                         u8 *mcs;
2613                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2614                         os_memcpy(mode->mcs_set, mcs, 16);
2615                 }
2616
2617                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2618                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2619                                   nla_len(nl_freq), freq_policy);
2620                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2621                                 continue;
2622                         mode->num_channels++;
2623                 }
2624
2625                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2626                 if (!mode->channels)
2627                         return NL_SKIP;
2628
2629                 idx = 0;
2630
2631                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2632                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2633                                   nla_len(nl_freq), freq_policy);
2634                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2635                                 continue;
2636
2637                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2638                         mode->channels[idx].flag = 0;
2639
2640                         if (!mode_is_set) {
2641                                 /* crude heuristic */
2642                                 if (mode->channels[idx].freq < 4000)
2643                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2644                                 else
2645                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2646                                 mode_is_set = 1;
2647                         }
2648
2649                         /* crude heuristic */
2650                         if (mode->channels[idx].freq < 4000)
2651                                 if (mode->channels[idx].freq == 2484)
2652                                         mode->channels[idx].chan = 14;
2653                                 else
2654                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2655                         else
2656                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2657
2658                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2659                                 mode->channels[idx].flag |=
2660                                         HOSTAPD_CHAN_DISABLED;
2661                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2662                                 mode->channels[idx].flag |=
2663                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2664                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2665                                 mode->channels[idx].flag |=
2666                                         HOSTAPD_CHAN_NO_IBSS;
2667                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2668                                 mode->channels[idx].flag |=
2669                                         HOSTAPD_CHAN_RADAR;
2670
2671                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2672                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2673                                 mode->channels[idx].max_tx_power =
2674                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2675
2676                         idx++;
2677                 }
2678
2679                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2680                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2681                                   nla_len(nl_rate), rate_policy);
2682                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2683                                 continue;
2684                         mode->num_rates++;
2685                 }
2686
2687                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2688                 if (!mode->rates)
2689                         return NL_SKIP;
2690
2691                 idx = 0;
2692
2693                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2694                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2695                                   nla_len(nl_rate), rate_policy);
2696                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2697                                 continue;
2698                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2699
2700                         /* crude heuristic */
2701                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2702                             mode->rates[idx] > 200)
2703                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2704
2705                         idx++;
2706                 }
2707         }
2708
2709         return NL_SKIP;
2710 }
2711
2712 static struct hostapd_hw_modes *
2713 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2714 {
2715         u16 m;
2716         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2717         int i, mode11g_idx = -1;
2718
2719         /* If only 802.11g mode is included, use it to construct matching
2720          * 802.11b mode data. */
2721
2722         for (m = 0; m < *num_modes; m++) {
2723                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2724                         return modes; /* 802.11b already included */
2725                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2726                         mode11g_idx = m;
2727         }
2728
2729         if (mode11g_idx < 0)
2730                 return modes; /* 2.4 GHz band not supported at all */
2731
2732         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2733         if (nmodes == NULL)
2734                 return modes; /* Could not add 802.11b mode */
2735
2736         mode = &nmodes[*num_modes];
2737         os_memset(mode, 0, sizeof(*mode));
2738         (*num_modes)++;
2739         modes = nmodes;
2740
2741         mode->mode = HOSTAPD_MODE_IEEE80211B;
2742
2743         mode11g = &modes[mode11g_idx];
2744         mode->num_channels = mode11g->num_channels;
2745         mode->channels = os_malloc(mode11g->num_channels *
2746                                    sizeof(struct hostapd_channel_data));
2747         if (mode->channels == NULL) {
2748                 (*num_modes)--;
2749                 return modes; /* Could not add 802.11b mode */
2750         }
2751         os_memcpy(mode->channels, mode11g->channels,
2752                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2753
2754         mode->num_rates = 0;
2755         mode->rates = os_malloc(4 * sizeof(int));
2756         if (mode->rates == NULL) {
2757                 os_free(mode->channels);
2758                 (*num_modes)--;
2759                 return modes; /* Could not add 802.11b mode */
2760         }
2761
2762         for (i = 0; i < mode11g->num_rates; i++) {
2763                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2764                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2765                         continue;
2766                 mode->rates[mode->num_rates] = mode11g->rates[i];
2767                 mode->num_rates++;
2768                 if (mode->num_rates == 4)
2769                         break;
2770         }
2771
2772         if (mode->num_rates == 0) {
2773                 os_free(mode->channels);
2774                 os_free(mode->rates);
2775                 (*num_modes)--;
2776                 return modes; /* No 802.11b rates */
2777         }
2778
2779         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2780                    "information");
2781
2782         return modes;
2783 }
2784
2785
2786 static struct hostapd_hw_modes *
2787 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2788 {
2789         struct i802_bss *bss = priv;
2790         struct wpa_driver_nl80211_data *drv = bss->drv;
2791         struct nl_msg *msg;
2792         struct phy_info_arg result = {
2793                 .num_modes = num_modes,
2794                 .modes = NULL,
2795         };
2796
2797         *num_modes = 0;
2798         *flags = 0;
2799
2800         msg = nlmsg_alloc();
2801         if (!msg)
2802                 return NULL;
2803
2804         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2805                     0, NL80211_CMD_GET_WIPHY, 0);
2806
2807         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2808
2809         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2810                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2811  nla_put_failure:
2812         return NULL;
2813 }
2814
2815
2816 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2817                                          const void *data, size_t len,
2818                                          int encrypt)
2819 {
2820         __u8 rtap_hdr[] = {
2821                 0x00, 0x00, /* radiotap version */
2822                 0x0e, 0x00, /* radiotap length */
2823                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2824                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2825                 0x00,       /* padding */
2826                 0x00, 0x00, /* RX and TX flags to indicate that */
2827                 0x00, 0x00, /* this is the injected frame directly */
2828         };
2829         struct iovec iov[2] = {
2830                 {
2831                         .iov_base = &rtap_hdr,
2832                         .iov_len = sizeof(rtap_hdr),
2833                 },
2834                 {
2835                         .iov_base = (void *) data,
2836                         .iov_len = len,
2837                 }
2838         };
2839         struct msghdr msg = {
2840                 .msg_name = NULL,
2841                 .msg_namelen = 0,
2842                 .msg_iov = iov,
2843                 .msg_iovlen = 2,
2844                 .msg_control = NULL,
2845                 .msg_controllen = 0,
2846                 .msg_flags = 0,
2847         };
2848
2849         if (encrypt)
2850                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2851
2852         return sendmsg(drv->monitor_sock, &msg, 0);
2853 }
2854
2855
2856 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2857                                         size_t data_len)
2858 {
2859         struct i802_bss *bss = priv;
2860         struct wpa_driver_nl80211_data *drv = bss->drv;
2861         struct ieee80211_mgmt *mgmt;
2862         int encrypt = 1;
2863         u16 fc;
2864
2865         mgmt = (struct ieee80211_mgmt *) data;
2866         fc = le_to_host16(mgmt->frame_control);
2867
2868         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2869             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2870                 /*
2871                  * Only one of the authentication frame types is encrypted.
2872                  * In order for static WEP encryption to work properly (i.e.,
2873                  * to not encrypt the frame), we need to tell mac80211 about
2874                  * the frames that must not be encrypted.
2875                  */
2876                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2877                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2878                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2879                         encrypt = 0;
2880         }
2881
2882         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2883 }
2884
2885
2886 static int wpa_driver_nl80211_set_beacon(void *priv,
2887                                          const u8 *head, size_t head_len,
2888                                          const u8 *tail, size_t tail_len,
2889                                          int dtim_period, int beacon_int)
2890 {
2891         struct i802_bss *bss = priv;
2892         struct wpa_driver_nl80211_data *drv = bss->drv;
2893         struct nl_msg *msg;
2894         u8 cmd = NL80211_CMD_NEW_BEACON;
2895         int ret;
2896         int beacon_set;
2897         int ifindex = if_nametoindex(bss->ifname);
2898
2899         beacon_set = bss->beacon_set;
2900
2901         msg = nlmsg_alloc();
2902         if (!msg)
2903                 return -ENOMEM;
2904
2905         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2906                    beacon_set);
2907         if (beacon_set)
2908                 cmd = NL80211_CMD_SET_BEACON;
2909
2910         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2911                     0, cmd, 0);
2912         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2913         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2914         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2915         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2916         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2917
2918         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2919         if (ret) {
2920                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2921                            ret, strerror(-ret));
2922         } else {
2923                 bss->beacon_set = 1;
2924         }
2925         return ret;
2926  nla_put_failure:
2927         return -ENOBUFS;
2928 }
2929
2930
2931 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2932                                        int freq, int ht_enabled,
2933                                        int sec_channel_offset)
2934 {
2935         struct nl_msg *msg;
2936         int ret;
2937
2938         msg = nlmsg_alloc();
2939         if (!msg)
2940                 return -1;
2941
2942         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2943                     NL80211_CMD_SET_WIPHY, 0);
2944
2945         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2946         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2947         if (ht_enabled) {
2948                 switch (sec_channel_offset) {
2949                 case -1:
2950                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2951                                     NL80211_CHAN_HT40MINUS);
2952                         break;
2953                 case 1:
2954                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2955                                     NL80211_CHAN_HT40PLUS);
2956                         break;
2957                 default:
2958                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2959                                     NL80211_CHAN_HT20);
2960                         break;
2961                 }
2962         }
2963
2964         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2965         if (ret == 0)
2966                 return 0;
2967         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2968                    "%d (%s)", freq, ret, strerror(-ret));
2969 nla_put_failure:
2970         return -1;
2971 }
2972
2973
2974 static int wpa_driver_nl80211_sta_add(void *priv,
2975                                       struct hostapd_sta_add_params *params)
2976 {
2977         struct i802_bss *bss = priv;
2978         struct wpa_driver_nl80211_data *drv = bss->drv;
2979         struct nl_msg *msg;
2980         int ret = -ENOBUFS;
2981
2982         msg = nlmsg_alloc();
2983         if (!msg)
2984                 return -ENOMEM;
2985
2986         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2987                     0, NL80211_CMD_NEW_STATION, 0);
2988
2989         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
2990         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2991         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2992         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2993                 params->supp_rates);
2994         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2995                     params->listen_interval);
2996         if (params->ht_capabilities) {
2997                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2998                         sizeof(*params->ht_capabilities),
2999                         params->ht_capabilities);
3000         }
3001
3002         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3003         if (ret)
3004                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3005                            "result: %d (%s)", ret, strerror(-ret));
3006         if (ret == -EEXIST)
3007                 ret = 0;
3008  nla_put_failure:
3009         return ret;
3010 }
3011
3012
3013 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
3014 {
3015         struct i802_bss *bss = priv;
3016         struct wpa_driver_nl80211_data *drv = bss->drv;
3017         struct nl_msg *msg;
3018         int ret;
3019
3020         msg = nlmsg_alloc();
3021         if (!msg)
3022                 return -ENOMEM;
3023
3024         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3025                     0, NL80211_CMD_DEL_STATION, 0);
3026
3027         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3028                     if_nametoindex(bss->ifname));
3029         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3030
3031         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3032         if (ret == -ENOENT)
3033                 return 0;
3034         return ret;
3035  nla_put_failure:
3036         return -ENOBUFS;
3037 }
3038
3039
3040 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
3041                                  int ifidx)
3042 {
3043         struct nl_msg *msg;
3044
3045         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
3046
3047 #ifdef HOSTAPD
3048         /* stop listening for EAPOL on this interface */
3049         del_ifidx(drv, ifidx);
3050 #endif /* HOSTAPD */
3051
3052         msg = nlmsg_alloc();
3053         if (!msg)
3054                 goto nla_put_failure;
3055
3056         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3057                     0, NL80211_CMD_DEL_INTERFACE, 0);
3058         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3059
3060         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3061                 return;
3062  nla_put_failure:
3063         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
3064 }
3065
3066
3067 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
3068                                      const char *ifname,
3069                                      enum nl80211_iftype iftype,
3070                                      const u8 *addr, int wds)
3071 {
3072         struct nl_msg *msg, *flags = NULL;
3073         int ifidx;
3074         int ret = -ENOBUFS;
3075
3076         msg = nlmsg_alloc();
3077         if (!msg)
3078                 return -1;
3079
3080         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3081                     0, NL80211_CMD_NEW_INTERFACE, 0);
3082         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3083         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3084         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3085
3086         if (iftype == NL80211_IFTYPE_MONITOR) {
3087                 int err;
3088
3089                 flags = nlmsg_alloc();
3090                 if (!flags)
3091                         goto nla_put_failure;
3092
3093                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3094
3095                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3096
3097                 nlmsg_free(flags);
3098
3099                 if (err)
3100                         goto nla_put_failure;
3101         } else if (wds) {
3102                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
3103         }
3104
3105         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3106         if (ret) {
3107  nla_put_failure:
3108                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
3109                            ifname, ret, strerror(-ret));
3110                 return ret;
3111         }
3112
3113         ifidx = if_nametoindex(ifname);
3114         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
3115                    ifname, ifidx);
3116
3117         if (ifidx <= 0)
3118                 return -1;
3119
3120 #ifdef HOSTAPD
3121         /* start listening for EAPOL on this interface */
3122         add_ifidx(drv, ifidx);
3123 #endif /* HOSTAPD */
3124
3125         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
3126             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
3127                 nl80211_remove_iface(drv, ifidx);
3128                 return -1;
3129         }
3130
3131         return ifidx;
3132 }
3133
3134
3135 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3136                                 const char *ifname, enum nl80211_iftype iftype,
3137                                 const u8 *addr, int wds)
3138 {
3139         int ret;
3140
3141         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
3142
3143         /* if error occured and interface exists already */
3144         if (ret == -ENFILE && if_nametoindex(ifname)) {
3145                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
3146
3147                 /* Try to remove the interface that was already there. */
3148                 nl80211_remove_iface(drv, if_nametoindex(ifname));
3149
3150                 /* Try to create the interface again */
3151                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
3152                                                 wds);
3153         }
3154
3155         if (ret >= 0 && drv->disable_11b_rates)
3156                 nl80211_disable_11b_rates(drv, ret, 1);
3157
3158         return ret;
3159 }
3160
3161
3162 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
3163 {
3164         struct ieee80211_hdr *hdr;
3165         u16 fc;
3166         union wpa_event_data event;
3167
3168         hdr = (struct ieee80211_hdr *) buf;
3169         fc = le_to_host16(hdr->frame_control);
3170
3171         os_memset(&event, 0, sizeof(event));
3172         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
3173         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
3174         event.tx_status.dst = hdr->addr1;
3175         event.tx_status.data = buf;
3176         event.tx_status.data_len = len;
3177         event.tx_status.ack = ok;
3178         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
3179 }
3180
3181
3182 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
3183                              u8 *buf, size_t len)
3184 {
3185         union wpa_event_data event;
3186         os_memset(&event, 0, sizeof(event));
3187         event.rx_from_unknown.frame = buf;
3188         event.rx_from_unknown.len = len;
3189         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
3190 }
3191
3192
3193 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3194                          u8 *buf, size_t len, int datarate, int ssi_signal)
3195 {
3196         struct ieee80211_hdr *hdr;
3197         u16 fc;
3198         union wpa_event_data event;
3199
3200         hdr = (struct ieee80211_hdr *) buf;
3201         fc = le_to_host16(hdr->frame_control);
3202
3203         switch (WLAN_FC_GET_TYPE(fc)) {
3204         case WLAN_FC_TYPE_MGMT:
3205                 os_memset(&event, 0, sizeof(event));
3206                 event.rx_mgmt.frame = buf;
3207                 event.rx_mgmt.frame_len = len;
3208                 event.rx_mgmt.datarate = datarate;
3209                 event.rx_mgmt.ssi_signal = ssi_signal;
3210                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3211                 break;
3212         case WLAN_FC_TYPE_CTRL:
3213                 /* can only get here with PS-Poll frames */
3214                 wpa_printf(MSG_DEBUG, "CTRL");
3215                 from_unknown_sta(drv, buf, len);
3216                 break;
3217         case WLAN_FC_TYPE_DATA:
3218                 from_unknown_sta(drv, buf, len);
3219                 break;
3220         }
3221 }
3222
3223
3224 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3225 {
3226         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3227         int len;
3228         unsigned char buf[3000];
3229         struct ieee80211_radiotap_iterator iter;
3230         int ret;
3231         int datarate = 0, ssi_signal = 0;
3232         int injected = 0, failed = 0, rxflags = 0;
3233
3234         len = recv(sock, buf, sizeof(buf), 0);
3235         if (len < 0) {
3236                 perror("recv");
3237                 return;
3238         }
3239
3240         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3241                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3242                            "frame since Probe Request reporting is disabled");
3243                 return;
3244         }
3245
3246         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3247                 printf("received invalid radiotap frame\n");
3248                 return;
3249         }
3250
3251         while (1) {
3252                 ret = ieee80211_radiotap_iterator_next(&iter);
3253                 if (ret == -ENOENT)
3254                         break;
3255                 if (ret) {
3256                         printf("received invalid radiotap frame (%d)\n", ret);
3257                         return;
3258                 }
3259                 switch (iter.this_arg_index) {
3260                 case IEEE80211_RADIOTAP_FLAGS:
3261                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3262                                 len -= 4;
3263                         break;
3264                 case IEEE80211_RADIOTAP_RX_FLAGS:
3265                         rxflags = 1;
3266                         break;
3267                 case IEEE80211_RADIOTAP_TX_FLAGS:
3268                         injected = 1;
3269                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3270                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3271                         break;
3272                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3273                         break;
3274                 case IEEE80211_RADIOTAP_CHANNEL:
3275                         /* TODO: convert from freq/flags to channel number */
3276                         break;
3277                 case IEEE80211_RADIOTAP_RATE:
3278                         datarate = *iter.this_arg * 5;
3279                         break;
3280                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3281                         ssi_signal = *iter.this_arg;
3282                         break;
3283                 }
3284         }
3285
3286         if (rxflags && injected)
3287                 return;
3288
3289         if (!injected)
3290                 handle_frame(drv, buf + iter.max_length,
3291                              len - iter.max_length, datarate, ssi_signal);
3292         else
3293                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3294                                    len - iter.max_length, !failed);
3295 }
3296
3297
3298 /*
3299  * we post-process the filter code later and rewrite
3300  * this to the offset to the last instruction
3301  */
3302 #define PASS    0xFF
3303 #define FAIL    0xFE
3304
3305 static struct sock_filter msock_filter_insns[] = {
3306         /*
3307          * do a little-endian load of the radiotap length field
3308          */
3309         /* load lower byte into A */
3310         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3311         /* put it into X (== index register) */
3312         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3313         /* load upper byte into A */
3314         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3315         /* left-shift it by 8 */
3316         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3317         /* or with X */
3318         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3319         /* put result into X */
3320         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3321
3322         /*
3323          * Allow management frames through, this also gives us those
3324          * management frames that we sent ourselves with status
3325          */
3326         /* load the lower byte of the IEEE 802.11 frame control field */
3327         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3328         /* mask off frame type and version */
3329         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3330         /* accept frame if it's both 0, fall through otherwise */
3331         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3332
3333         /*
3334          * TODO: add a bit to radiotap RX flags that indicates
3335          * that the sending station is not associated, then
3336          * add a filter here that filters on our DA and that flag
3337          * to allow us to deauth frames to that bad station.
3338          *
3339          * Not a regression -- we didn't do it before either.
3340          */
3341
3342 #if 0
3343         /*
3344          * drop non-data frames
3345          */
3346         /* load the lower byte of the frame control field */
3347         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3348         /* mask off QoS bit */
3349         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3350         /* drop non-data frames */
3351         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3352 #endif
3353         /* load the upper byte of the frame control field */
3354         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3355         /* mask off toDS/fromDS */
3356         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3357         /* accept WDS frames */
3358         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3359
3360         /*
3361          * add header length to index
3362          */
3363         /* load the lower byte of the frame control field */
3364         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3365         /* mask off QoS bit */
3366         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3367         /* right shift it by 6 to give 0 or 2 */
3368         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3369         /* add data frame header length */
3370         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3371         /* add index, was start of 802.11 header */
3372         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3373         /* move to index, now start of LL header */
3374         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3375
3376         /*
3377          * Accept empty data frames, we use those for
3378          * polling activity.
3379          */
3380         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3381         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3382
3383         /*
3384          * Accept EAPOL frames
3385          */
3386         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3387         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3388         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3389         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3390
3391         /* keep these last two statements or change the code below */
3392         /* return 0 == "DROP" */
3393         BPF_STMT(BPF_RET | BPF_K, 0),
3394         /* return ~0 == "keep all" */
3395         BPF_STMT(BPF_RET | BPF_K, ~0),
3396 };
3397
3398 static struct sock_fprog msock_filter = {
3399         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3400         .filter = msock_filter_insns,
3401 };
3402
3403
3404 static int add_monitor_filter(int s)
3405 {
3406         int idx;
3407
3408         /* rewrite all PASS/FAIL jump offsets */
3409         for (idx = 0; idx < msock_filter.len; idx++) {
3410                 struct sock_filter *insn = &msock_filter_insns[idx];
3411
3412                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3413                         if (insn->code == (BPF_JMP|BPF_JA)) {
3414                                 if (insn->k == PASS)
3415                                         insn->k = msock_filter.len - idx - 2;
3416                                 else if (insn->k == FAIL)
3417                                         insn->k = msock_filter.len - idx - 3;
3418                         }
3419
3420                         if (insn->jt == PASS)
3421                                 insn->jt = msock_filter.len - idx - 2;
3422                         else if (insn->jt == FAIL)
3423                                 insn->jt = msock_filter.len - idx - 3;
3424
3425                         if (insn->jf == PASS)
3426                                 insn->jf = msock_filter.len - idx - 2;
3427                         else if (insn->jf == FAIL)
3428                                 insn->jf = msock_filter.len - idx - 3;
3429                 }
3430         }
3431
3432         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3433                        &msock_filter, sizeof(msock_filter))) {
3434                 perror("SO_ATTACH_FILTER");
3435                 return -1;
3436         }
3437
3438         return 0;
3439 }
3440
3441
3442 static void nl80211_remove_monitor_interface(
3443         struct wpa_driver_nl80211_data *drv)
3444 {
3445         if (drv->monitor_ifidx >= 0) {
3446                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3447                 drv->monitor_ifidx = -1;
3448         }
3449         if (drv->monitor_sock >= 0) {
3450                 eloop_unregister_read_sock(drv->monitor_sock);
3451                 close(drv->monitor_sock);
3452                 drv->monitor_sock = -1;
3453         }
3454 }
3455
3456
3457 static int
3458 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3459 {
3460         char buf[IFNAMSIZ];
3461         struct sockaddr_ll ll;
3462         int optval;
3463         socklen_t optlen;
3464
3465         snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
3466         buf[IFNAMSIZ - 1] = '\0';
3467
3468         drv->monitor_ifidx =
3469                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3470                                      0);
3471
3472         if (drv->monitor_ifidx < 0)
3473                 return -1;
3474
3475         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3476                 goto error;
3477
3478         memset(&ll, 0, sizeof(ll));
3479         ll.sll_family = AF_PACKET;
3480         ll.sll_ifindex = drv->monitor_ifidx;
3481         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3482         if (drv->monitor_sock < 0) {
3483                 perror("socket[PF_PACKET,SOCK_RAW]");
3484                 goto error;
3485         }
3486
3487         if (add_monitor_filter(drv->monitor_sock)) {
3488                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3489                            "interface; do filtering in user space");
3490                 /* This works, but will cost in performance. */
3491         }
3492
3493         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3494                 perror("monitor socket bind");
3495                 goto error;
3496         }
3497
3498         optlen = sizeof(optval);
3499         optval = 20;
3500         if (setsockopt
3501             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3502                 perror("Failed to set socket priority");
3503                 goto error;
3504         }
3505
3506         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3507                                      drv, NULL)) {
3508                 printf("Could not register monitor read socket\n");
3509                 goto error;
3510         }
3511
3512         return 0;
3513  error:
3514         nl80211_remove_monitor_interface(drv);
3515         return -1;
3516 }
3517
3518
3519 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3520
3521 static int wpa_driver_nl80211_hapd_send_eapol(
3522         void *priv, const u8 *addr, const u8 *data,
3523         size_t data_len, int encrypt, const u8 *own_addr)
3524 {
3525         struct i802_bss *bss = priv;
3526         struct wpa_driver_nl80211_data *drv = bss->drv;
3527         struct ieee80211_hdr *hdr;
3528         size_t len;
3529         u8 *pos;
3530         int res;
3531 #if 0 /* FIX */
3532         int qos = sta->flags & WPA_STA_WMM;
3533 #else
3534         int qos = 0;
3535 #endif
3536
3537         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3538                 data_len;
3539         hdr = os_zalloc(len);
3540         if (hdr == NULL) {
3541                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3542                        (unsigned long) len);
3543                 return -1;
3544         }
3545
3546         hdr->frame_control =
3547                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3548         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3549         if (encrypt)
3550                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3551 #if 0 /* To be enabled if qos determination is added above */
3552         if (qos) {
3553                 hdr->frame_control |=
3554                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3555         }
3556 #endif
3557
3558         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3559         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3560         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3561         pos = (u8 *) (hdr + 1);
3562
3563 #if 0 /* To be enabled if qos determination is added above */
3564         if (qos) {
3565                 /* add an empty QoS header if needed */
3566                 pos[0] = 0;
3567                 pos[1] = 0;
3568                 pos += 2;
3569         }
3570 #endif
3571
3572         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3573         pos += sizeof(rfc1042_header);
3574         WPA_PUT_BE16(pos, ETH_P_PAE);
3575         pos += 2;
3576         memcpy(pos, data, data_len);
3577
3578         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3579         if (res < 0) {
3580                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3581                            "failed: %d (%s)",
3582                            (unsigned long) len, errno, strerror(errno));
3583         }
3584         os_free(hdr);
3585
3586         return res;
3587 }
3588
3589
3590 static u32 sta_flags_nl80211(int flags)
3591 {
3592         u32 f = 0;
3593
3594         if (flags & WPA_STA_AUTHORIZED)
3595                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3596         if (flags & WPA_STA_WMM)
3597                 f |= BIT(NL80211_STA_FLAG_WME);
3598         if (flags & WPA_STA_SHORT_PREAMBLE)
3599                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3600         if (flags & WPA_STA_MFP)
3601                 f |= BIT(NL80211_STA_FLAG_MFP);
3602
3603         return f;
3604 }
3605
3606
3607 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3608                                             int total_flags,
3609                                             int flags_or, int flags_and)
3610 {
3611         struct i802_bss *bss = priv;
3612         struct wpa_driver_nl80211_data *drv = bss->drv;
3613         struct nl_msg *msg, *flags = NULL;
3614         struct nl80211_sta_flag_update upd;
3615
3616         msg = nlmsg_alloc();
3617         if (!msg)
3618                 return -ENOMEM;
3619
3620         flags = nlmsg_alloc();
3621         if (!flags) {
3622                 nlmsg_free(msg);
3623                 return -ENOMEM;
3624         }
3625
3626         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3627                     0, NL80211_CMD_SET_STATION, 0);
3628
3629         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3630                     if_nametoindex(bss->ifname));
3631         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3632
3633         /*
3634          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3635          * can be removed eventually.
3636          */
3637         if (total_flags & WPA_STA_AUTHORIZED)
3638                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3639
3640         if (total_flags & WPA_STA_WMM)
3641                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3642
3643         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3644                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3645
3646         if (total_flags & WPA_STA_MFP)
3647                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3648
3649         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3650                 goto nla_put_failure;
3651
3652         os_memset(&upd, 0, sizeof(upd));
3653         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3654         upd.set = sta_flags_nl80211(flags_or);
3655         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3656
3657         nlmsg_free(flags);
3658
3659         return send_and_recv_msgs(drv, msg, NULL, NULL);
3660  nla_put_failure:
3661         nlmsg_free(flags);
3662         return -ENOBUFS;
3663 }
3664
3665
3666 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3667                                  struct wpa_driver_associate_params *params)
3668 {
3669         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
3670             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3671                 nl80211_remove_monitor_interface(drv);
3672                 return -1;
3673         }
3674
3675         /* TODO: setup monitor interface (and add code somewhere to remove this
3676          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3677
3678         return 0;
3679 }
3680
3681
3682 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3683 {
3684         struct nl_msg *msg;
3685         int ret = -1;
3686
3687         msg = nlmsg_alloc();
3688         if (!msg)
3689                 return -1;
3690
3691         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3692                     NL80211_CMD_LEAVE_IBSS, 0);
3693         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3694         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3695         msg = NULL;
3696         if (ret) {
3697                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3698                            "(%s)", ret, strerror(-ret));
3699                 goto nla_put_failure;
3700         }
3701
3702         ret = 0;
3703         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3704
3705 nla_put_failure:
3706         nlmsg_free(msg);
3707         return ret;
3708 }
3709
3710
3711 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3712                                    struct wpa_driver_associate_params *params)
3713 {
3714         struct nl_msg *msg;
3715         int ret = -1;
3716         int count = 0;
3717
3718         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3719
3720         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
3721                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3722                            "IBSS mode");
3723                 return -1;
3724         }
3725
3726 retry:
3727         msg = nlmsg_alloc();
3728         if (!msg)
3729                 return -1;
3730
3731         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3732                     NL80211_CMD_JOIN_IBSS, 0);
3733         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3734
3735         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3736                 goto nla_put_failure;
3737
3738         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3739                           params->ssid, params->ssid_len);
3740         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3741                 params->ssid);
3742         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3743         drv->ssid_len = params->ssid_len;
3744
3745         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3746         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3747
3748         ret = nl80211_set_conn_keys(params, msg);
3749         if (ret)
3750                 goto nla_put_failure;
3751
3752         if (params->wpa_ie) {
3753                 wpa_hexdump(MSG_DEBUG,
3754                             "  * Extra IEs for Beacon/Probe Response frames",
3755                             params->wpa_ie, params->wpa_ie_len);
3756                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3757                         params->wpa_ie);
3758         }
3759
3760         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3761         msg = NULL;
3762         if (ret) {
3763                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3764                            ret, strerror(-ret));
3765                 count++;
3766                 if (ret == -EALREADY && count == 1) {
3767                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3768                                    "forced leave");
3769                         nl80211_leave_ibss(drv);
3770                         nlmsg_free(msg);
3771                         goto retry;
3772                 }
3773
3774                 goto nla_put_failure;
3775         }
3776         ret = 0;
3777         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3778
3779 nla_put_failure:
3780         nlmsg_free(msg);
3781         return ret;
3782 }
3783
3784
3785 static int wpa_driver_nl80211_connect(
3786         struct wpa_driver_nl80211_data *drv,
3787         struct wpa_driver_associate_params *params)
3788 {
3789         struct nl_msg *msg;
3790         enum nl80211_auth_type type;
3791         int ret = 0;
3792
3793         msg = nlmsg_alloc();
3794         if (!msg)
3795                 return -1;
3796
3797         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3798         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3799                     NL80211_CMD_CONNECT, 0);
3800
3801         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3802         if (params->bssid) {
3803                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3804                            MAC2STR(params->bssid));
3805                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3806         }
3807         if (params->freq) {
3808                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3809                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3810         }
3811         if (params->ssid) {
3812                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3813                                   params->ssid, params->ssid_len);
3814                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3815                         params->ssid);
3816                 if (params->ssid_len > sizeof(drv->ssid))
3817                         goto nla_put_failure;
3818                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3819                 drv->ssid_len = params->ssid_len;
3820         }
3821         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3822         if (params->wpa_ie)
3823                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3824                         params->wpa_ie);
3825
3826         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3827                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3828         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3829                 type = NL80211_AUTHTYPE_SHARED_KEY;
3830         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3831                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3832         else if (params->auth_alg & WPA_AUTH_ALG_FT)
3833                 type = NL80211_AUTHTYPE_FT;
3834         else
3835                 goto nla_put_failure;
3836
3837         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3838         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3839
3840         if (params->wpa_ie && params->wpa_ie_len) {
3841                 enum nl80211_wpa_versions ver;
3842
3843                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3844                         ver = NL80211_WPA_VERSION_2;
3845                 else
3846                         ver = NL80211_WPA_VERSION_1;
3847
3848                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3849                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3850         }
3851
3852         if (params->pairwise_suite != CIPHER_NONE) {
3853                 int cipher;
3854
3855                 switch (params->pairwise_suite) {
3856                 case CIPHER_WEP40:
3857                         cipher = WLAN_CIPHER_SUITE_WEP40;
3858                         break;
3859                 case CIPHER_WEP104:
3860                         cipher = WLAN_CIPHER_SUITE_WEP104;
3861                         break;
3862                 case CIPHER_CCMP:
3863                         cipher = WLAN_CIPHER_SUITE_CCMP;
3864                         break;
3865                 case CIPHER_TKIP:
3866                 default:
3867                         cipher = WLAN_CIPHER_SUITE_TKIP;
3868                         break;
3869                 }
3870                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3871         }
3872
3873         if (params->group_suite != CIPHER_NONE) {
3874                 int cipher;
3875
3876                 switch (params->group_suite) {
3877                 case CIPHER_WEP40:
3878                         cipher = WLAN_CIPHER_SUITE_WEP40;
3879                         break;
3880                 case CIPHER_WEP104:
3881                         cipher = WLAN_CIPHER_SUITE_WEP104;
3882                         break;
3883                 case CIPHER_CCMP:
3884                         cipher = WLAN_CIPHER_SUITE_CCMP;
3885                         break;
3886                 case CIPHER_TKIP:
3887                 default:
3888                         cipher = WLAN_CIPHER_SUITE_TKIP;
3889                         break;
3890                 }
3891                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3892         }
3893
3894         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3895             params->key_mgmt_suite == KEY_MGMT_PSK) {
3896                 int mgmt = WLAN_AKM_SUITE_PSK;
3897
3898                 switch (params->key_mgmt_suite) {
3899                 case KEY_MGMT_802_1X:
3900                         mgmt = WLAN_AKM_SUITE_8021X;
3901                         break;
3902                 case KEY_MGMT_PSK:
3903                 default:
3904                         mgmt = WLAN_AKM_SUITE_PSK;
3905                         break;
3906                 }
3907                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3908         }
3909
3910         ret = nl80211_set_conn_keys(params, msg);
3911         if (ret)
3912                 goto nla_put_failure;
3913
3914         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3915         msg = NULL;
3916         if (ret) {
3917                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3918                            "(%s)", ret, strerror(-ret));
3919                 goto nla_put_failure;
3920         }
3921         ret = 0;
3922         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3923
3924 nla_put_failure:
3925         nlmsg_free(msg);
3926         return ret;
3927
3928 }
3929
3930
3931 static int wpa_driver_nl80211_associate(
3932         void *priv, struct wpa_driver_associate_params *params)
3933 {
3934         struct i802_bss *bss = priv;
3935         struct wpa_driver_nl80211_data *drv = bss->drv;
3936         int ret = -1;
3937         struct nl_msg *msg;
3938
3939         if (params->mode == IEEE80211_MODE_AP)
3940                 return wpa_driver_nl80211_ap(drv, params);
3941
3942         if (params->mode == IEEE80211_MODE_IBSS)
3943                 return wpa_driver_nl80211_ibss(drv, params);
3944
3945         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3946                 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
3947                         return -1;
3948                 return wpa_driver_nl80211_connect(drv, params);
3949         }
3950
3951         drv->associated = 0;
3952
3953         msg = nlmsg_alloc();
3954         if (!msg)
3955                 return -1;
3956
3957         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3958                    drv->ifindex);
3959         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3960                     NL80211_CMD_ASSOCIATE, 0);
3961
3962         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3963         if (params->bssid) {
3964                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3965                            MAC2STR(params->bssid));
3966                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3967         }
3968         if (params->freq) {
3969                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3970                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3971                 drv->assoc_freq = params->freq;
3972         } else
3973                 drv->assoc_freq = 0;
3974         if (params->ssid) {
3975                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3976                                   params->ssid, params->ssid_len);
3977                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3978                         params->ssid);
3979                 if (params->ssid_len > sizeof(drv->ssid))
3980                         goto nla_put_failure;
3981                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3982                 drv->ssid_len = params->ssid_len;
3983         }
3984         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3985         if (params->wpa_ie)
3986                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3987                         params->wpa_ie);
3988
3989 #ifdef CONFIG_IEEE80211W
3990         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3991                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3992 #endif /* CONFIG_IEEE80211W */
3993
3994         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3995
3996         if (params->prev_bssid) {
3997                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3998                            MAC2STR(params->prev_bssid));
3999                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
4000                         params->prev_bssid);
4001         }
4002
4003         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4004         msg = NULL;
4005         if (ret) {
4006                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
4007                            "(%s)", ret, strerror(-ret));
4008                 nl80211_dump_scan(drv);
4009                 goto nla_put_failure;
4010         }
4011         ret = 0;
4012         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
4013                    "successfully");
4014
4015 nla_put_failure:
4016         nlmsg_free(msg);
4017         return ret;
4018 }
4019
4020
4021 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
4022                             int ifindex, int mode)
4023 {
4024         struct nl_msg *msg;
4025         int ret = -ENOBUFS;
4026
4027         msg = nlmsg_alloc();
4028         if (!msg)
4029                 return -ENOMEM;
4030
4031         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4032                     0, NL80211_CMD_SET_INTERFACE, 0);
4033         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4034         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
4035
4036         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4037         if (!ret)
4038                 return 0;
4039 nla_put_failure:
4040         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
4041                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
4042         return ret;
4043 }
4044
4045
4046 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
4047 {
4048         struct i802_bss *bss = priv;
4049         struct wpa_driver_nl80211_data *drv = bss->drv;
4050         int ret = -1;
4051         int nlmode;
4052
4053         switch (mode) {
4054         case 0:
4055                 nlmode = NL80211_IFTYPE_STATION;
4056                 break;
4057         case 1:
4058                 nlmode = NL80211_IFTYPE_ADHOC;
4059                 break;
4060         case 2:
4061                 nlmode = NL80211_IFTYPE_AP;
4062                 break;
4063         default:
4064                 return -1;
4065         }
4066
4067         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
4068                 drv->nlmode = nlmode;
4069                 ret = 0;
4070                 goto done;
4071         }
4072
4073         if (nlmode == drv->nlmode) {
4074                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
4075                            "requested mode - ignore error");
4076                 ret = 0;
4077                 goto done; /* Already in the requested mode */
4078         }
4079
4080         /* mac80211 doesn't allow mode changes while the device is up, so
4081          * take the device down, try to set the mode again, and bring the
4082          * device back up.
4083          */
4084         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) == 0) {
4085                 /* Try to set the mode again while the interface is down */
4086                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
4087                 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
4088                         ret = -1;
4089         }
4090
4091         if (!ret) {
4092                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
4093                            "interface is down");
4094                 drv->nlmode = nlmode;
4095         }
4096
4097 done:
4098         if (!ret && nlmode == NL80211_IFTYPE_AP) {
4099                 /* Setup additional AP mode functionality if needed */
4100                 if (drv->monitor_ifidx < 0 &&
4101                     nl80211_create_monitor_interface(drv))
4102                         return -1;
4103         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
4104                 /* Remove additional AP mode functionality */
4105                 nl80211_remove_monitor_interface(drv);
4106                 bss->beacon_set = 0;
4107         }
4108
4109         if (ret)
4110                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
4111                            "from %d failed", nlmode, drv->nlmode);
4112
4113         return ret;
4114 }
4115
4116
4117 static int wpa_driver_nl80211_get_capa(void *priv,
4118                                        struct wpa_driver_capa *capa)
4119 {
4120         struct i802_bss *bss = priv;
4121         struct wpa_driver_nl80211_data *drv = bss->drv;
4122         if (!drv->has_capability)
4123                 return -1;
4124         os_memcpy(capa, &drv->capa, sizeof(*capa));
4125         return 0;
4126 }
4127
4128
4129 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
4130 {
4131         struct i802_bss *bss = priv;
4132         struct wpa_driver_nl80211_data *drv = bss->drv;
4133
4134         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
4135                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
4136         drv->operstate = state;
4137         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
4138                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
4139 }
4140
4141
4142 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
4143 {
4144         struct i802_bss *bss = priv;
4145         struct wpa_driver_nl80211_data *drv = bss->drv;
4146         struct nl_msg *msg;
4147         struct nl80211_sta_flag_update upd;
4148
4149         msg = nlmsg_alloc();
4150         if (!msg)
4151                 return -ENOMEM;
4152
4153         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4154                     0, NL80211_CMD_SET_STATION, 0);
4155
4156         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4157                     if_nametoindex(bss->ifname));
4158         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
4159
4160         os_memset(&upd, 0, sizeof(upd));
4161         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
4162         if (authorized)
4163                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
4164         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4165
4166         return send_and_recv_msgs(drv, msg, NULL, NULL);
4167  nla_put_failure:
4168         return -ENOBUFS;
4169 }
4170
4171
4172 #ifdef HOSTAPD
4173
4174 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4175 {
4176         int i;
4177         int *old;
4178
4179         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
4180                    ifidx);
4181         for (i = 0; i < drv->num_if_indices; i++) {
4182                 if (drv->if_indices[i] == 0) {
4183                         drv->if_indices[i] = ifidx;
4184                         return;
4185                 }
4186         }
4187
4188         if (drv->if_indices != drv->default_if_indices)
4189                 old = drv->if_indices;
4190         else
4191                 old = NULL;
4192
4193         drv->if_indices = os_realloc(old,
4194                                      sizeof(int) * (drv->num_if_indices + 1));
4195         if (!drv->if_indices) {
4196                 if (!old)
4197                         drv->if_indices = drv->default_if_indices;
4198                 else
4199                         drv->if_indices = old;
4200                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4201                            "interfaces");
4202                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4203                 return;
4204         } else if (!old)
4205                 os_memcpy(drv->if_indices, drv->default_if_indices,
4206                           sizeof(drv->default_if_indices));
4207         drv->if_indices[drv->num_if_indices] = ifidx;
4208         drv->num_if_indices++;
4209 }
4210
4211
4212 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4213 {
4214         int i;
4215
4216         for (i = 0; i < drv->num_if_indices; i++) {
4217                 if (drv->if_indices[i] == ifidx) {
4218                         drv->if_indices[i] = 0;
4219                         break;
4220                 }
4221         }
4222 }
4223
4224
4225 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4226 {
4227         int i;
4228
4229         for (i = 0; i < drv->num_if_indices; i++)
4230                 if (drv->if_indices[i] == ifidx)
4231                         return 1;
4232
4233         return 0;
4234 }
4235
4236
4237 static inline int min_int(int a, int b)
4238 {
4239         if (a < b)
4240                 return a;
4241         return b;
4242 }
4243
4244
4245 static int get_key_handler(struct nl_msg *msg, void *arg)
4246 {
4247         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4248         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4249
4250         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4251                   genlmsg_attrlen(gnlh, 0), NULL);
4252
4253         /*
4254          * TODO: validate the key index and mac address!
4255          * Otherwise, there's a race condition as soon as
4256          * the kernel starts sending key notifications.
4257          */
4258
4259         if (tb[NL80211_ATTR_KEY_SEQ])
4260                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4261                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4262         return NL_SKIP;
4263 }
4264
4265
4266 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4267                            int idx, u8 *seq)
4268 {
4269         struct i802_bss *bss = priv;
4270         struct wpa_driver_nl80211_data *drv = bss->drv;
4271         struct nl_msg *msg;
4272
4273         msg = nlmsg_alloc();
4274         if (!msg)
4275                 return -ENOMEM;
4276
4277         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4278                     0, NL80211_CMD_GET_KEY, 0);
4279
4280         if (addr)
4281                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4282         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4283         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4284
4285         memset(seq, 0, 6);
4286
4287         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4288  nla_put_failure:
4289         return -ENOBUFS;
4290 }
4291
4292
4293 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4294                               int mode)
4295 {
4296         struct i802_bss *bss = priv;
4297         struct wpa_driver_nl80211_data *drv = bss->drv;
4298         struct nl_msg *msg;
4299         u8 rates[NL80211_MAX_SUPP_RATES];
4300         u8 rates_len = 0;
4301         int i;
4302
4303         msg = nlmsg_alloc();
4304         if (!msg)
4305                 return -ENOMEM;
4306
4307         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4308                     NL80211_CMD_SET_BSS, 0);
4309
4310         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4311                 rates[rates_len++] = basic_rates[i] / 5;
4312
4313         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4314
4315         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4316
4317         return send_and_recv_msgs(drv, msg, NULL, NULL);
4318  nla_put_failure:
4319         return -ENOBUFS;
4320 }
4321
4322 #endif /* HOSTAPD */
4323
4324
4325 /* Set kernel driver on given frequency (MHz) */
4326 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4327 {
4328         struct i802_bss *bss = priv;
4329         struct wpa_driver_nl80211_data *drv = bss->drv;
4330         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4331                                            freq->sec_channel_offset);
4332 }
4333
4334
4335 #ifdef HOSTAPD
4336
4337 static int i802_set_rts(void *priv, int rts)
4338 {
4339         struct i802_bss *bss = priv;
4340         struct wpa_driver_nl80211_data *drv = bss->drv;
4341         struct nl_msg *msg;
4342         int ret = -ENOBUFS;
4343         u32 val;
4344
4345         msg = nlmsg_alloc();
4346         if (!msg)
4347                 return -ENOMEM;
4348
4349         if (rts >= 2347)
4350                 val = (u32) -1;
4351         else
4352                 val = rts;
4353
4354         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4355                     0, NL80211_CMD_SET_WIPHY, 0);
4356         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4357         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4358
4359         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4360         if (!ret)
4361                 return 0;
4362 nla_put_failure:
4363         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4364                    "%d (%s)", rts, ret, strerror(-ret));
4365         return ret;
4366 }
4367
4368
4369 static int i802_set_frag(void *priv, int frag)
4370 {
4371         struct i802_bss *bss = priv;
4372         struct wpa_driver_nl80211_data *drv = bss->drv;
4373         struct nl_msg *msg;
4374         int ret = -ENOBUFS;
4375         u32 val;
4376
4377         msg = nlmsg_alloc();
4378         if (!msg)
4379                 return -ENOMEM;
4380
4381         if (frag >= 2346)
4382                 val = (u32) -1;
4383         else
4384                 val = frag;
4385
4386         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4387                     0, NL80211_CMD_SET_WIPHY, 0);
4388         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4389         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4390
4391         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4392         if (!ret)
4393                 return 0;
4394 nla_put_failure:
4395         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4396                    "%d: %d (%s)", frag, ret, strerror(-ret));
4397         return ret;
4398 }
4399
4400
4401 static int i802_flush(void *priv)
4402 {
4403         struct i802_bss *bss = priv;
4404         struct wpa_driver_nl80211_data *drv = bss->drv;
4405         struct nl_msg *msg;
4406
4407         msg = nlmsg_alloc();
4408         if (!msg)
4409                 return -1;
4410
4411         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4412                     0, NL80211_CMD_DEL_STATION, 0);
4413
4414         /*
4415          * XXX: FIX! this needs to flush all VLANs too
4416          */
4417         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4418                     if_nametoindex(bss->ifname));
4419
4420         return send_and_recv_msgs(drv, msg, NULL, NULL);
4421  nla_put_failure:
4422         return -ENOBUFS;
4423 }
4424
4425
4426 static int get_sta_handler(struct nl_msg *msg, void *arg)
4427 {
4428         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4429         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4430         struct hostap_sta_driver_data *data = arg;
4431         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4432         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4433                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4434                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4435                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4436                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4437                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4438         };
4439
4440         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4441                   genlmsg_attrlen(gnlh, 0), NULL);
4442
4443         /*
4444          * TODO: validate the interface and mac address!
4445          * Otherwise, there's a race condition as soon as
4446          * the kernel starts sending station notifications.
4447          */
4448
4449         if (!tb[NL80211_ATTR_STA_INFO]) {
4450                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4451                 return NL_SKIP;
4452         }
4453         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4454                              tb[NL80211_ATTR_STA_INFO],
4455                              stats_policy)) {
4456                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4457                 return NL_SKIP;
4458         }
4459
4460         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4461                 data->inactive_msec =
4462                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4463         if (stats[NL80211_STA_INFO_RX_BYTES])
4464                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4465         if (stats[NL80211_STA_INFO_TX_BYTES])
4466                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4467         if (stats[NL80211_STA_INFO_RX_PACKETS])
4468                 data->rx_packets =
4469                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4470         if (stats[NL80211_STA_INFO_TX_PACKETS])
4471                 data->tx_packets =
4472                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4473
4474         return NL_SKIP;
4475 }
4476
4477 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4478                               const u8 *addr)
4479 {
4480         struct i802_bss *bss = priv;
4481         struct wpa_driver_nl80211_data *drv = bss->drv;
4482         struct nl_msg *msg;
4483
4484         os_memset(data, 0, sizeof(*data));
4485         msg = nlmsg_alloc();
4486         if (!msg)
4487                 return -ENOMEM;
4488
4489         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4490                     0, NL80211_CMD_GET_STATION, 0);
4491
4492         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4493         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4494
4495         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4496  nla_put_failure:
4497         return -ENOBUFS;
4498 }
4499
4500
4501 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4502                                     int cw_min, int cw_max, int burst_time)
4503 {
4504         struct i802_bss *bss = priv;
4505         struct wpa_driver_nl80211_data *drv = bss->drv;
4506         struct nl_msg *msg;
4507         struct nlattr *txq, *params;
4508
4509         msg = nlmsg_alloc();
4510         if (!msg)
4511                 return -1;
4512
4513         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4514                     0, NL80211_CMD_SET_WIPHY, 0);
4515
4516         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4517
4518         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4519         if (!txq)
4520                 goto nla_put_failure;
4521
4522         /* We are only sending parameters for a single TXQ at a time */
4523         params = nla_nest_start(msg, 1);
4524         if (!params)
4525                 goto nla_put_failure;
4526
4527         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4528         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4529          * 32 usec, so need to convert the value here. */
4530         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4531         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4532         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4533         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4534
4535         nla_nest_end(msg, params);
4536
4537         nla_nest_end(msg, txq);
4538
4539         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4540                 return 0;
4541  nla_put_failure:
4542         return -1;
4543 }
4544
4545
4546 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4547 {
4548         struct i802_bss *bss = priv;
4549         struct wpa_driver_nl80211_data *drv = bss->drv;
4550         struct nl_msg *msg;
4551
4552         msg = nlmsg_alloc();
4553         if (!msg)
4554                 return -ENOMEM;
4555
4556         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4557                     NL80211_CMD_SET_BSS, 0);
4558
4559         if (cts >= 0)
4560                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4561         if (preamble >= 0)
4562                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4563         if (slot >= 0)
4564                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4565
4566         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4567
4568         return send_and_recv_msgs(drv, msg, NULL, NULL);
4569  nla_put_failure:
4570         return -ENOBUFS;
4571 }
4572
4573
4574 static int i802_set_cts_protect(void *priv, int value)
4575 {
4576         return i802_set_bss(priv, value, -1, -1);
4577 }
4578
4579
4580 static int i802_set_preamble(void *priv, int value)
4581 {
4582         return i802_set_bss(priv, -1, value, -1);
4583 }
4584
4585
4586 static int i802_set_short_slot_time(void *priv, int value)
4587 {
4588         return i802_set_bss(priv, -1, -1, value);
4589 }
4590
4591
4592 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4593                              const char *ifname, int vlan_id)
4594 {
4595         struct i802_bss *bss = priv;
4596         struct wpa_driver_nl80211_data *drv = bss->drv;
4597         struct nl_msg *msg;
4598         int ret = -ENOBUFS;
4599
4600         msg = nlmsg_alloc();
4601         if (!msg)
4602                 return -ENOMEM;
4603
4604         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4605                     0, NL80211_CMD_SET_STATION, 0);
4606
4607         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4608                     if_nametoindex(bss->ifname));
4609         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4610         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4611                     if_nametoindex(ifname));
4612
4613         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4614         if (ret < 0) {
4615                 wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
4616                            MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
4617                            MAC2STR(addr), ifname, vlan_id, ret,
4618                            strerror(-ret));
4619         }
4620  nla_put_failure:
4621         return ret;
4622 }
4623
4624
4625 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4626 {
4627         struct i802_bss *bss = priv;
4628         struct wpa_driver_nl80211_data *drv = bss->drv;
4629         char name[IFNAMSIZ + 1];
4630
4631         os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
4632         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4633                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4634         if (val) {
4635                 if (nl80211_create_iface(drv, name, NL80211_IFTYPE_AP_VLAN,
4636                                          NULL, 1) < 0)
4637                         return -1;
4638                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4639                 return i802_set_sta_vlan(priv, addr, name, 0);
4640         } else {
4641                 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
4642                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4643                                                     name);
4644         }
4645 }
4646
4647
4648 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4649 {
4650         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4651         struct sockaddr_ll lladdr;
4652         unsigned char buf[3000];
4653         int len;
4654         socklen_t fromlen = sizeof(lladdr);
4655
4656         len = recvfrom(sock, buf, sizeof(buf), 0,
4657                        (struct sockaddr *)&lladdr, &fromlen);
4658         if (len < 0) {
4659                 perror("recv");
4660                 return;
4661         }
4662
4663         if (have_ifidx(drv, lladdr.sll_ifindex))
4664                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4665 }
4666
4667
4668 static int i802_get_inact_sec(void *priv, const u8 *addr)
4669 {
4670         struct hostap_sta_driver_data data;
4671         int ret;
4672
4673         data.inactive_msec = (unsigned long) -1;
4674         ret = i802_read_sta_data(priv, &data, addr);
4675         if (ret || data.inactive_msec == (unsigned long) -1)
4676                 return -1;
4677         return data.inactive_msec / 1000;
4678 }
4679
4680
4681 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4682 {
4683 #if 0
4684         /* TODO */
4685 #endif
4686         return 0;
4687 }
4688
4689
4690 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4691                            int reason)
4692 {
4693         struct i802_bss *bss = priv;
4694         struct ieee80211_mgmt mgmt;
4695
4696         memset(&mgmt, 0, sizeof(mgmt));
4697         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4698                                           WLAN_FC_STYPE_DEAUTH);
4699         memcpy(mgmt.da, addr, ETH_ALEN);
4700         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4701         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4702         mgmt.u.deauth.reason_code = host_to_le16(reason);
4703         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4704                                             IEEE80211_HDRLEN +
4705                                             sizeof(mgmt.u.deauth));
4706 }
4707
4708
4709 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4710                              int reason)
4711 {
4712         struct i802_bss *bss = priv;
4713         struct ieee80211_mgmt mgmt;
4714
4715         memset(&mgmt, 0, sizeof(mgmt));
4716         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4717                                           WLAN_FC_STYPE_DISASSOC);
4718         memcpy(mgmt.da, addr, ETH_ALEN);
4719         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4720         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4721         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4722         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4723                                             IEEE80211_HDRLEN +
4724                                             sizeof(mgmt.u.disassoc));
4725 }
4726
4727
4728 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4729                              const char *brname, const char *ifname)
4730 {
4731         int ifindex;
4732         char in_br[IFNAMSIZ];
4733
4734         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4735         ifindex = if_nametoindex(brname);
4736         if (ifindex == 0) {
4737                 /*
4738                  * Bridge was configured, but the bridge device does
4739                  * not exist. Try to add it now.
4740                  */
4741                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4742                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4743                                    "bridge interface %s: %s",
4744                                    brname, strerror(errno));
4745                         return -1;
4746                 }
4747                 drv->added_bridge = 1;
4748                 add_ifidx(drv, if_nametoindex(brname));
4749         }
4750
4751         if (linux_br_get(in_br, ifname) == 0) {
4752                 if (os_strcmp(in_br, brname) == 0)
4753                         return 0; /* already in the bridge */
4754
4755                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4756                            "bridge %s", ifname, in_br);
4757                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4758                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4759                                    "remove interface %s from bridge "
4760                                    "%s: %s",
4761                                    ifname, brname, strerror(errno));
4762                         return -1;
4763                 }
4764         }
4765
4766         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4767                    ifname, brname);
4768         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4769                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4770                            "into bridge %s: %s",
4771                            ifname, brname, strerror(errno));
4772                 return -1;
4773         }
4774         drv->added_if_into_bridge = 1;
4775
4776         return 0;
4777 }
4778
4779
4780 static void *i802_init(struct hostapd_data *hapd,
4781                        struct wpa_init_params *params)
4782 {
4783         struct wpa_driver_nl80211_data *drv;
4784         struct i802_bss *bss;
4785         size_t i;
4786         char brname[IFNAMSIZ];
4787         int ifindex, br_ifindex;
4788         int br_added = 0;
4789
4790         bss = wpa_driver_nl80211_init(hapd, params->ifname);
4791         if (bss == NULL)
4792                 return NULL;
4793
4794         drv = bss->drv;
4795         if (linux_br_get(brname, params->ifname) == 0) {
4796                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4797                            params->ifname, brname);
4798                 br_ifindex = if_nametoindex(brname);
4799         } else {
4800                 brname[0] = '\0';
4801                 br_ifindex = 0;
4802         }
4803
4804         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4805         drv->if_indices = drv->default_if_indices;
4806         for (i = 0; i < params->num_bridge; i++) {
4807                 if (params->bridge[i]) {
4808                         ifindex = if_nametoindex(params->bridge[i]);
4809                         if (ifindex)
4810                                 add_ifidx(drv, ifindex);
4811                         if (ifindex == br_ifindex)
4812                                 br_added = 1;
4813                 }
4814         }
4815         if (!br_added && br_ifindex &&
4816             (params->num_bridge == 0 || !params->bridge[0]))
4817                 add_ifidx(drv, br_ifindex);
4818
4819         /* start listening for EAPOL on the default AP interface */
4820         add_ifidx(drv, drv->ifindex);
4821
4822         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
4823                 goto failed;
4824
4825         if (params->bssid) {
4826                 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
4827                                        params->bssid))
4828                         goto failed;
4829         }
4830
4831         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
4832                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4833                            "into AP mode", bss->ifname);
4834                 goto failed;
4835         }
4836
4837         if (params->num_bridge && params->bridge[0] &&
4838             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
4839                 goto failed;
4840
4841         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
4842                 goto failed;
4843
4844         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4845         if (drv->eapol_sock < 0) {
4846                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4847                 goto failed;
4848         }
4849
4850         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4851         {
4852                 printf("Could not register read socket for eapol\n");
4853                 goto failed;
4854         }
4855
4856         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
4857                 goto failed;
4858
4859         return bss;
4860
4861 failed:
4862         nl80211_remove_monitor_interface(drv);
4863         if (drv->ioctl_sock >= 0)
4864                 close(drv->ioctl_sock);
4865
4866         genl_family_put(drv->nl80211);
4867         nl_cache_free(drv->nl_cache);
4868         nl_handle_destroy(drv->nl_handle);
4869         nl_cb_put(drv->nl_cb);
4870
4871         os_free(drv);
4872         return NULL;
4873 }
4874
4875
4876 static void i802_deinit(void *priv)
4877 {
4878         wpa_driver_nl80211_deinit(priv);
4879 }
4880
4881 #endif /* HOSTAPD */
4882
4883
4884 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4885         enum wpa_driver_if_type type)
4886 {
4887         switch (type) {
4888         case WPA_IF_STATION:
4889                 return NL80211_IFTYPE_STATION;
4890         case WPA_IF_AP_VLAN:
4891                 return NL80211_IFTYPE_AP_VLAN;
4892         case WPA_IF_AP_BSS:
4893                 return NL80211_IFTYPE_AP;
4894         }
4895         return -1;
4896 }
4897
4898
4899 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
4900                                      const char *ifname, const u8 *addr,
4901                                      void *bss_ctx, void **drv_priv,
4902                                      char *force_ifname, u8 *if_addr)
4903 {
4904         struct i802_bss *bss = priv;
4905         struct wpa_driver_nl80211_data *drv = bss->drv;
4906         int ifidx;
4907 #ifdef HOSTAPD
4908         struct i802_bss *new_bss = NULL;
4909
4910         if (type == WPA_IF_AP_BSS) {
4911                 new_bss = os_zalloc(sizeof(*new_bss));
4912                 if (new_bss == NULL)
4913                         return -1;
4914         }
4915 #endif /* HOSTAPD */
4916
4917         if (addr)
4918                 os_memcpy(if_addr, addr, ETH_ALEN);
4919         ifidx = nl80211_create_iface(drv, ifname,
4920                                      wpa_driver_nl80211_if_type(type), addr,
4921                                      0);
4922         if (ifidx < 0) {
4923 #ifdef HOSTAPD
4924                 os_free(new_bss);
4925 #endif /* HOSTAPD */
4926                 return -1;
4927         }
4928
4929         if (!addr &&
4930             linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0)
4931                 return -1;
4932
4933 #ifdef HOSTAPD
4934         if (type == WPA_IF_AP_BSS) {
4935                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
4936                         nl80211_remove_iface(drv, ifidx);
4937                         os_free(new_bss);
4938                         return -1;
4939                 }
4940                 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
4941                 new_bss->ifindex = ifidx;
4942                 new_bss->drv = drv;
4943                 new_bss->next = drv->first_bss.next;
4944                 drv->first_bss.next = new_bss;
4945                 if (drv_priv)
4946                         *drv_priv = new_bss;
4947         }
4948 #endif /* HOSTAPD */
4949
4950         return 0;
4951 }
4952
4953
4954 static int wpa_driver_nl80211_if_remove(void *priv,
4955                                         enum wpa_driver_if_type type,
4956                                         const char *ifname)
4957 {
4958         struct i802_bss *bss = priv;
4959         struct wpa_driver_nl80211_data *drv = bss->drv;
4960         int ifindex = if_nametoindex(ifname);
4961
4962         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
4963                    __func__, type, ifname, ifindex);
4964         if (ifindex <= 0)
4965                 return -1;
4966         nl80211_remove_iface(drv, ifindex);
4967
4968 #ifdef HOSTAPD
4969         if (type != WPA_IF_AP_BSS)
4970                 return 0;
4971
4972         if (bss != &drv->first_bss) {
4973                 struct i802_bss *tbss = &drv->first_bss;
4974
4975                 while (tbss) {
4976                         if (tbss->next != bss)
4977                                 continue;
4978
4979                         tbss->next = bss->next;
4980                         os_free(bss);
4981                         break;
4982                 }
4983         }
4984 #endif /* HOSTAPD */
4985
4986         return 0;
4987 }
4988
4989
4990 static int cookie_handler(struct nl_msg *msg, void *arg)
4991 {
4992         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4993         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4994         u64 *cookie = arg;
4995         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4996                   genlmsg_attrlen(gnlh, 0), NULL);
4997         if (tb[NL80211_ATTR_COOKIE])
4998                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
4999         return NL_SKIP;
5000 }
5001
5002
5003 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
5004                                           const u8 *dst, const u8 *src,
5005                                           const u8 *bssid,
5006                                           const u8 *data, size_t data_len)
5007 {
5008         struct i802_bss *bss = priv;
5009         struct wpa_driver_nl80211_data *drv = bss->drv;
5010         int ret = -1;
5011         struct nl_msg *msg;
5012         u8 *buf;
5013         struct ieee80211_hdr *hdr;
5014         u64 cookie;
5015
5016         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
5017                    drv->ifindex);
5018
5019         buf = os_zalloc(24 + data_len);
5020         if (buf == NULL)
5021                 return ret;
5022         os_memcpy(buf + 24, data, data_len);
5023         hdr = (struct ieee80211_hdr *) buf;
5024         hdr->frame_control =
5025                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
5026         os_memcpy(hdr->addr1, dst, ETH_ALEN);
5027         os_memcpy(hdr->addr2, src, ETH_ALEN);
5028         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
5029
5030         if (drv->nlmode == NL80211_IFTYPE_AP) {
5031                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
5032                 os_free(buf);
5033                 return ret;
5034         }
5035
5036         msg = nlmsg_alloc();
5037         if (!msg) {
5038                 os_free(buf);
5039                 return -1;
5040         }
5041
5042         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5043                     NL80211_CMD_ACTION, 0);
5044
5045         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5046         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5047         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
5048         os_free(buf);
5049         buf = NULL;
5050
5051         cookie = 0;
5052         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5053         msg = NULL;
5054         if (ret) {
5055                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
5056                            "(%s)", ret, strerror(-ret));
5057                 goto nla_put_failure;
5058         }
5059         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
5060                    "cookie 0x%llx", (long long unsigned int) cookie);
5061         drv->send_action_cookie = cookie;
5062         drv->pending_send_action = 1;
5063         ret = 0;
5064
5065 nla_put_failure:
5066         os_free(buf);
5067         nlmsg_free(msg);
5068         return ret;
5069 }
5070
5071
5072 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
5073                                                 unsigned int duration)
5074 {
5075         struct i802_bss *bss = priv;
5076         struct wpa_driver_nl80211_data *drv = bss->drv;
5077         struct nl_msg *msg;
5078         int ret;
5079         u64 cookie;
5080
5081         msg = nlmsg_alloc();
5082         if (!msg)
5083                 return -1;
5084
5085         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5086                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
5087
5088         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5089         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5090         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5091
5092         cookie = 0;
5093         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5094         if (ret == 0) {
5095                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
5096                            "0x%llx for freq=%u MHz duration=%u",
5097                            (long long unsigned int) cookie, freq, duration);
5098                 drv->remain_on_chan_cookie = cookie;
5099                 return 0;
5100         }
5101         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
5102                    "(freq=%d): %d (%s)", freq, ret, strerror(-ret));
5103 nla_put_failure:
5104         return -1;
5105 }
5106
5107
5108 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
5109 {
5110         struct i802_bss *bss = priv;
5111         struct wpa_driver_nl80211_data *drv = bss->drv;
5112         struct nl_msg *msg;
5113         int ret;
5114
5115         if (!drv->pending_remain_on_chan) {
5116                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
5117                            "to cancel");
5118                 return -1;
5119         }
5120
5121         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
5122                    "0x%llx",
5123                    (long long unsigned int) drv->remain_on_chan_cookie);
5124
5125         msg = nlmsg_alloc();
5126         if (!msg)
5127                 return -1;
5128
5129         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5130                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
5131
5132         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5133         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
5134
5135         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5136         if (ret == 0)
5137                 return 0;
5138         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
5139                    "%d (%s)", ret, strerror(-ret));
5140 nla_put_failure:
5141         return -1;
5142 }
5143
5144
5145 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
5146                                                         void *timeout_ctx)
5147 {
5148         struct wpa_driver_nl80211_data *drv = eloop_ctx;
5149         if (drv->monitor_ifidx < 0)
5150                 return; /* monitor interface already removed */
5151
5152         if (drv->nlmode != NL80211_IFTYPE_STATION)
5153                 return; /* not in station mode anymore */
5154
5155         if (drv->probe_req_report)
5156                 return; /* reporting enabled */
5157
5158         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
5159                    "Probe Request reporting needed anymore");
5160         nl80211_remove_monitor_interface(drv);
5161 }
5162
5163
5164 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
5165 {
5166         struct i802_bss *bss = priv;
5167         struct wpa_driver_nl80211_data *drv = bss->drv;
5168
5169         if (drv->nlmode != NL80211_IFTYPE_STATION) {
5170                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
5171                            "allowed in station mode (iftype=%d)",
5172                            drv->nlmode);
5173                 return -1;
5174         }
5175         drv->probe_req_report = report;
5176
5177         if (report) {
5178                 eloop_cancel_timeout(
5179                         wpa_driver_nl80211_probe_req_report_timeout,
5180                         drv, NULL);
5181                 if (drv->monitor_ifidx < 0 &&
5182                     nl80211_create_monitor_interface(drv))
5183                         return -1;
5184         } else {
5185                 /*
5186                  * It takes a while to remove the monitor interface, so try to
5187                  * avoid doing this if it is needed again shortly. Instead,
5188                  * schedule the interface to be removed later if no need for it
5189                  * is seen.
5190                  */
5191                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
5192                            "to be removed after 10 seconds of no use");
5193                 eloop_register_timeout(
5194                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
5195                         drv, NULL);
5196         }
5197
5198         return 0;
5199 }
5200
5201
5202 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5203                                      int ifindex, int disabled)
5204 {
5205         struct nl_msg *msg;
5206         struct nlattr *bands, *band;
5207         int ret;
5208
5209         msg = nlmsg_alloc();
5210         if (!msg)
5211                 return -1;
5212
5213         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5214                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5215         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5216
5217         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5218         if (!bands)
5219                 goto nla_put_failure;
5220
5221         /*
5222          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5223          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5224          * rates. All 5 GHz rates are left enabled.
5225          */
5226         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5227         if (!band)
5228                 goto nla_put_failure;
5229         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5230                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5231         nla_nest_end(msg, band);
5232
5233         nla_nest_end(msg, bands);
5234
5235         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5236         msg = NULL;
5237         if (ret) {
5238                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5239                            "(%s)", ret, strerror(-ret));
5240         }
5241
5242         return ret;
5243
5244 nla_put_failure:
5245         nlmsg_free(msg);
5246         return -1;
5247 }
5248
5249
5250 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5251 {
5252         struct i802_bss *bss = priv;
5253         struct wpa_driver_nl80211_data *drv = bss->drv;
5254         drv->disable_11b_rates = disabled;
5255         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5256 }
5257
5258
5259 static int wpa_driver_nl80211_deinit_ap(void *priv)
5260 {
5261         struct i802_bss *bss = priv;
5262         struct wpa_driver_nl80211_data *drv = bss->drv;
5263         if (drv->nlmode != NL80211_IFTYPE_AP)
5264                 return -1;
5265         wpa_driver_nl80211_del_beacon(drv);
5266         return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
5267 }
5268
5269
5270 static void wpa_driver_nl80211_resume(void *priv)
5271 {
5272         struct i802_bss *bss = priv;
5273         struct wpa_driver_nl80211_data *drv = bss->drv;
5274         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
5275                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5276                            "resume event");
5277         }
5278 }
5279
5280
5281 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
5282                                   const u8 *ies, size_t ies_len)
5283 {
5284         struct i802_bss *bss = priv;
5285         struct wpa_driver_nl80211_data *drv = bss->drv;
5286         int ret;
5287         u8 *data, *pos;
5288         size_t data_len;
5289         u8 own_addr[ETH_ALEN];
5290
5291         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
5292                 return -1;
5293
5294         if (action != 1) {
5295                 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
5296                            "action %d", action);
5297                 return -1;
5298         }
5299
5300         /*
5301          * Action frame payload:
5302          * Category[1] = 6 (Fast BSS Transition)
5303          * Action[1] = 1 (Fast BSS Transition Request)
5304          * STA Address
5305          * Target AP Address
5306          * FT IEs
5307          */
5308
5309         data_len = 2 + 2 * ETH_ALEN + ies_len;
5310         data = os_malloc(data_len);
5311         if (data == NULL)
5312                 return -1;
5313         pos = data;
5314         *pos++ = 0x06; /* FT Action category */
5315         *pos++ = action;
5316         os_memcpy(pos, own_addr, ETH_ALEN);
5317         pos += ETH_ALEN;
5318         os_memcpy(pos, target_ap, ETH_ALEN);
5319         pos += ETH_ALEN;
5320         os_memcpy(pos, ies, ies_len);
5321
5322         ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
5323                                              own_addr, drv->bssid,
5324                                              data, data_len);
5325         os_free(data);
5326
5327         return ret;
5328 }
5329
5330
5331 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
5332 {
5333         struct i802_bss *bss = priv;
5334         struct wpa_driver_nl80211_data *drv = bss->drv;
5335         struct nl_msg *msg, *cqm = NULL;
5336
5337         wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
5338                    "hysteresis=%d", threshold, hysteresis);
5339
5340         msg = nlmsg_alloc();
5341         if (!msg)
5342                 return -1;
5343
5344         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5345                     0, NL80211_CMD_SET_CQM, 0);
5346
5347         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
5348
5349         cqm = nlmsg_alloc();
5350         if (cqm == NULL)
5351                 return -1;
5352
5353         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
5354         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
5355         nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
5356
5357         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
5358                 return 0;
5359         msg = NULL;
5360
5361 nla_put_failure:
5362         if (cqm)
5363                 nlmsg_free(cqm);
5364         nlmsg_free(msg);
5365         return -1;
5366 }
5367
5368
5369 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
5370                               int encrypt)
5371 {
5372         struct i802_bss *bss = priv;
5373         struct wpa_driver_nl80211_data *drv = bss->drv;
5374         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
5375 }
5376
5377
5378 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5379         .name = "nl80211",
5380         .desc = "Linux nl80211/cfg80211",
5381         .get_bssid = wpa_driver_nl80211_get_bssid,
5382         .get_ssid = wpa_driver_nl80211_get_ssid,
5383         .set_key = wpa_driver_nl80211_set_key,
5384         .scan2 = wpa_driver_nl80211_scan,
5385         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5386         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5387         .disassociate = wpa_driver_nl80211_disassociate,
5388         .authenticate = wpa_driver_nl80211_authenticate,
5389         .associate = wpa_driver_nl80211_associate,
5390         .init = wpa_driver_nl80211_init,
5391         .deinit = wpa_driver_nl80211_deinit,
5392         .get_capa = wpa_driver_nl80211_get_capa,
5393         .set_operstate = wpa_driver_nl80211_set_operstate,
5394         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5395         .set_country = wpa_driver_nl80211_set_country,
5396         .set_beacon = wpa_driver_nl80211_set_beacon,
5397         .if_add = wpa_driver_nl80211_if_add,
5398         .if_remove = wpa_driver_nl80211_if_remove,
5399         .send_mlme = wpa_driver_nl80211_send_mlme,
5400         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5401         .sta_add = wpa_driver_nl80211_sta_add,
5402         .sta_remove = wpa_driver_nl80211_sta_remove,
5403         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5404         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5405 #ifdef HOSTAPD
5406         .hapd_init = i802_init,
5407         .hapd_deinit = i802_deinit,
5408         .get_seqnum = i802_get_seqnum,
5409         .flush = i802_flush,
5410         .read_sta_data = i802_read_sta_data,
5411         .sta_deauth = i802_sta_deauth,
5412         .sta_disassoc = i802_sta_disassoc,
5413         .get_inact_sec = i802_get_inact_sec,
5414         .sta_clear_stats = i802_sta_clear_stats,
5415         .set_rts = i802_set_rts,
5416         .set_frag = i802_set_frag,
5417         .set_rate_sets = i802_set_rate_sets,
5418         .set_cts_protect = i802_set_cts_protect,
5419         .set_preamble = i802_set_preamble,
5420         .set_short_slot_time = i802_set_short_slot_time,
5421         .set_tx_queue_params = i802_set_tx_queue_params,
5422         .set_sta_vlan = i802_set_sta_vlan,
5423         .set_wds_sta = i802_set_wds_sta,
5424 #endif /* HOSTAPD */
5425         .set_freq = i802_set_freq,
5426         .send_action = wpa_driver_nl80211_send_action,
5427         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5428         .cancel_remain_on_channel =
5429         wpa_driver_nl80211_cancel_remain_on_channel,
5430         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5431         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5432         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5433         .resume = wpa_driver_nl80211_resume,
5434         .send_ft_action = nl80211_send_ft_action,
5435         .signal_monitor = nl80211_signal_monitor,
5436         .send_frame = nl80211_send_frame,
5437 };