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         int if_disabled;
  77         struct rfkill_data *rfkill;
  78         struct wpa_driver_capa capa;
  79         int has_capability;
  80
  81         int operstate;
  82
  83         int scan_complete_events;
  84
  85         struct nl_handle *nl_handle;
  86         struct nl_handle *nl_handle_event;
  87         struct nl_cache *nl_cache;
  88         struct nl_cache *nl_cache_event;
  89         struct nl_cb *nl_cb;
  90         struct genl_family *nl80211;
  91
  92         u8 auth_bssid[ETH_ALEN];
  93         u8 bssid[ETH_ALEN];
  94         int associated;
  95         u8 ssid[32];
  96         size_t ssid_len;
  97         int nlmode;
  98         int ap_scan_as_station;
  99         unsigned int assoc_freq;
 100
 101         int monitor_sock;
 102         int monitor_ifidx;
 103         int probe_req_report;
 104         int disable_11b_rates;
 105
 106         unsigned int pending_remain_on_chan: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         if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
 418                 wpa_printf(MSG_DEBUG, "nl80211: Interface down");
 419                 drv->if_disabled = 1;
 420                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
 421         }
 422
 423         if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
 424                 wpa_printf(MSG_DEBUG, "nl80211: Interface up");
 425                 drv->if_disabled = 0;
 426                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
 427         }
 428
 429         /*
 430          * Some drivers send the association event before the operup event--in
 431          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 432          * fails. This will hit us when wpa_supplicant does not need to do
 433          * IEEE 802.1X authentication
 434          */
 435         if (drv->operstate == 1 &&
 436             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 437             !(ifi->ifi_flags & IFF_RUNNING))
 438                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 439                                        -1, IF_OPER_UP);
 440
 441         attrlen = len;
 442         attr = (struct rtattr *) buf;
 443         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 444         while (RTA_OK(attr, attrlen)) {
 445                 if (attr->rta_type == IFLA_IFNAME) {
 446                         wpa_driver_nl80211_event_link(
 447                                 drv,
 448                                 ((char *) attr) + rta_len,
 449                                 attr->rta_len - rta_len, 0);
 450                 } else if (attr->rta_type == IFLA_MASTER)
 451                         brid = nla_get_u32((struct nlattr *) attr);
 452                 attr = RTA_NEXT(attr, attrlen);
 453         }
 454
 455 #ifdef HOSTAPD
 456         if (ifi->ifi_family == AF_BRIDGE && brid) {
 457                 /* device has been added to bridge */
 458                 char namebuf[IFNAMSIZ];
 459                 if_indextoname(brid, namebuf);
 460                 wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
 461                            brid, namebuf);
 462                 add_ifidx(drv, brid);
 463         }
 464 #endif /* HOSTAPD */
 465 }
 466
 467
 468 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 469                                                  struct ifinfomsg *ifi,
 470                                                  u8 *buf, size_t len)
 471 {
 472         struct wpa_driver_nl80211_data *drv = ctx;
 473         int attrlen, rta_len;
 474         struct rtattr *attr;
 475         u32 brid = 0;
 476
 477         attrlen = len;
 478         attr = (struct rtattr *) buf;
 479
 480         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 481         while (RTA_OK(attr, attrlen)) {
 482                 if (attr->rta_type == IFLA_IFNAME) {
 483                         wpa_driver_nl80211_event_link(
 484                                 drv,
 485                                 ((char *) attr) + rta_len,
 486                                 attr->rta_len - rta_len, 1);
 487                 } else if (attr->rta_type == IFLA_MASTER)
 488                         brid = nla_get_u32((struct nlattr *) attr);
 489                 attr = RTA_NEXT(attr, attrlen);
 490         }
 491
 492 #ifdef HOSTAPD
 493         if (ifi->ifi_family == AF_BRIDGE && brid) {
 494                 /* device has been removed from bridge */
 495                 char namebuf[IFNAMSIZ];
 496                 if_indextoname(brid, namebuf);
 497                 wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
 498                            "%s", brid, namebuf);
 499                 del_ifidx(drv, brid);
 500         }
 501 #endif /* HOSTAPD */
 502 }
 503
 504
 505 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 506                             const u8 *frame, size_t len)
 507 {
 508         const struct ieee80211_mgmt *mgmt;
 509         union wpa_event_data event;
 510
 511         mgmt = (const struct ieee80211_mgmt *) frame;
 512         if (len < 24 + sizeof(mgmt->u.auth)) {
 513                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 514                            "frame");
 515                 return;
 516         }
 517
 518         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 519         os_memset(&event, 0, sizeof(event));
 520         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 521         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 522         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 523         if (len > 24 + sizeof(mgmt->u.auth)) {
 524                 event.auth.ies = mgmt->u.auth.variable;
 525                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 526         }
 527
 528         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 529 }
 530
 531
 532 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 533                             const u8 *frame, size_t len)
 534 {
 535         const struct ieee80211_mgmt *mgmt;
 536         union wpa_event_data event;
 537         u16 status;
 538
 539         mgmt = (const struct ieee80211_mgmt *) frame;
 540         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 541                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 542                            "frame");
 543                 return;
 544         }
 545
 546         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 547         if (status != WLAN_STATUS_SUCCESS) {
 548                 os_memset(&event, 0, sizeof(event));
 549                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 550                         event.assoc_reject.resp_ies =
 551                                 (u8 *) mgmt->u.assoc_resp.variable;
 552                         event.assoc_reject.resp_ies_len =
 553                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 554                 }
 555                 event.assoc_reject.status_code = status;
 556
 557                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 558                 return;
 559         }
 560
 561         drv->associated = 1;
 562         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 563
 564         os_memset(&event, 0, sizeof(event));
 565         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 566                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 567                 event.assoc_info.resp_ies_len =
 568                         len - 24 - sizeof(mgmt->u.assoc_resp);
 569         }
 570
 571         event.assoc_info.freq = drv->assoc_freq;
 572
 573         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 574 }
 575
 576
 577 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 578                                enum nl80211_commands cmd, struct nlattr *status,
 579                                struct nlattr *addr, struct nlattr *req_ie,
 580                                struct nlattr *resp_ie)
 581 {
 582         union wpa_event_data event;
 583
 584         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 585                 /*
 586                  * Avoid reporting two association events that would confuse
 587                  * the core code.
 588                  */
 589                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 590                            "when using userspace SME", cmd);
 591                 return;
 592         }
 593
 594         os_memset(&event, 0, sizeof(event));
 595         if (cmd == NL80211_CMD_CONNECT &&
 596             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 597                 if (resp_ie) {
 598                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 599                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 600                 }
 601                 event.assoc_reject.status_code = nla_get_u16(status);
 602                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 603                 return;
 604         }
 605
 606         drv->associated = 1;
 607         if (addr)
 608                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 609
 610         if (req_ie) {
 611                 event.assoc_info.req_ies = nla_data(req_ie);
 612                 event.assoc_info.req_ies_len = nla_len(req_ie);
 613         }
 614         if (resp_ie) {
 615                 event.assoc_info.resp_ies = nla_data(resp_ie);
 616                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 617         }
 618
 619         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 620 }
 621
 622
 623 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 624                                enum nl80211_commands cmd, struct nlattr *addr)
 625 {
 626         union wpa_event_data event;
 627         enum wpa_event_type ev;
 628
 629         if (nla_len(addr) != ETH_ALEN)
 630                 return;
 631
 632         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 633                    cmd, MAC2STR((u8 *) nla_data(addr)));
 634
 635         if (cmd == NL80211_CMD_AUTHENTICATE)
 636                 ev = EVENT_AUTH_TIMED_OUT;
 637         else if (cmd == NL80211_CMD_ASSOCIATE)
 638                 ev = EVENT_ASSOC_TIMED_OUT;
 639         else
 640                 return;
 641
 642         os_memset(&event, 0, sizeof(event));
 643         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 644         wpa_supplicant_event(drv->ctx, ev, &event);
 645 }
 646
 647
 648 static void mlme_event_action(struct wpa_driver_nl80211_data *drv,
 649                               struct nlattr *freq, const u8 *frame, size_t len)
 650 {
 651         const struct ieee80211_mgmt *mgmt;
 652         union wpa_event_data event;
 653         u16 fc, stype;
 654
 655         mgmt = (const struct ieee80211_mgmt *) frame;
 656         if (len < 24) {
 657                 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
 658                 return;
 659         }
 660
 661         fc = le_to_host16(mgmt->frame_control);
 662         stype = WLAN_FC_GET_STYPE(fc);
 663
 664         os_memset(&event, 0, sizeof(event));
 665         event.rx_action.da = mgmt->da;
 666         event.rx_action.sa = mgmt->sa;
 667         event.rx_action.bssid = mgmt->bssid;
 668         event.rx_action.category = mgmt->u.action.category;
 669         event.rx_action.data = &mgmt->u.action.category + 1;
 670         event.rx_action.len = frame + len - event.rx_action.data;
 671         if (freq)
 672                 event.rx_action.freq = nla_get_u32(freq);
 673         wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
 674 }
 675
 676
 677 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
 678                                         struct nlattr *cookie, const u8 *frame,
 679                                         size_t len, struct nlattr *ack)
 680 {
 681         union wpa_event_data event;
 682         const struct ieee80211_hdr *hdr;
 683         u16 fc;
 684         u64 cookie_val;
 685
 686         if (!cookie)
 687                 return;
 688
 689         cookie_val = nla_get_u64(cookie);
 690         wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s "
 691                    "(ack=%d)",
 692                    (long long unsigned int) cookie_val,
 693                    cookie_val == drv->send_action_cookie ?
 694                    " (match)" : " (unknown)", ack != NULL);
 695         if (cookie_val != drv->send_action_cookie)
 696                 return;
 697
 698         hdr = (const struct ieee80211_hdr *) frame;
 699         fc = le_to_host16(hdr->frame_control);
 700
 701         os_memset(&event, 0, sizeof(event));
 702         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
 703         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
 704         event.tx_status.dst = hdr->addr1;
 705         event.tx_status.data = frame;
 706         event.tx_status.data_len = len;
 707         event.tx_status.ack = ack != NULL;
 708         wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
 709 }
 710
 711
 712 static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
 713                                        enum wpa_event_type type,
 714                                        const u8 *frame, size_t len)
 715 {
 716         const struct ieee80211_mgmt *mgmt;
 717         union wpa_event_data event;
 718         const u8 *bssid = NULL;
 719         u16 reason_code = 0;
 720
 721         mgmt = (const struct ieee80211_mgmt *) frame;
 722         if (len >= 24) {
 723                 bssid = mgmt->bssid;
 724
 725                 if (drv->associated != 0 &&
 726                     os_memcmp(bssid, drv->bssid, ETH_ALEN) != 0 &&
 727                     os_memcmp(bssid, drv->auth_bssid, ETH_ALEN) != 0) {
 728                         /*
 729                          * We have presumably received this deauth as a
 730                          * response to a clear_state_mismatch() outgoing
 731                          * deauth.  Don't let it take us offline!
 732                          */
 733                         wpa_printf(MSG_DEBUG, "nl80211: Deauth received "
 734                                    "from Unknown BSSID " MACSTR " -- ignoring",
 735                                    MAC2STR(bssid));
 736                         return;
 737                 }
 738         }
 739
 740         drv->associated = 0;
 741         os_memset(&event, 0, sizeof(event));
 742
 743         /* Note: Same offset for Reason Code in both frame subtypes */
 744         if (len >= 24 + sizeof(mgmt->u.deauth))
 745                 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
 746
 747         if (type == EVENT_DISASSOC) {
 748                 event.disassoc_info.addr = bssid;
 749                 event.disassoc_info.reason_code = reason_code;
 750                 if (frame + len > mgmt->u.disassoc.variable) {
 751                         event.disassoc_info.ie = mgmt->u.disassoc.variable;
 752                         event.disassoc_info.ie_len = frame + len -
 753                                 mgmt->u.disassoc.variable;
 754                 }
 755         } else {
 756                 event.deauth_info.addr = bssid;
 757                 event.deauth_info.reason_code = reason_code;
 758                 if (frame + len > mgmt->u.deauth.variable) {
 759                         event.deauth_info.ie = mgmt->u.deauth.variable;
 760                         event.deauth_info.ie_len = frame + len -
 761                                 mgmt->u.deauth.variable;
 762                 }
 763         }
 764
 765         wpa_supplicant_event(drv->ctx, type, &event);
 766 }
 767
 768
 769 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 770                        enum nl80211_commands cmd, struct nlattr *frame,
 771                        struct nlattr *addr, struct nlattr *timed_out,
 772                        struct nlattr *freq, struct nlattr *ack,
 773                        struct nlattr *cookie)
 774 {
 775         if (timed_out && addr) {
 776                 mlme_timeout_event(drv, cmd, addr);
 777                 return;
 778         }
 779
 780         if (frame == NULL) {
 781                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 782                            "data", cmd);
 783                 return;
 784         }
 785
 786         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 787         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 788                     nla_data(frame), nla_len(frame));
 789
 790         switch (cmd) {
 791         case NL80211_CMD_AUTHENTICATE:
 792                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 793                 break;
 794         case NL80211_CMD_ASSOCIATE:
 795                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 796                 break;
 797         case NL80211_CMD_DEAUTHENTICATE:
 798                 mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
 799                                            nla_data(frame), nla_len(frame));
 800                 break;
 801         case NL80211_CMD_DISASSOCIATE:
 802                 mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
 803                                            nla_data(frame), nla_len(frame));
 804                 break;
 805         case NL80211_CMD_ACTION:
 806                 mlme_event_action(drv, freq, nla_data(frame), nla_len(frame));
 807                 break;
 808         case NL80211_CMD_ACTION_TX_STATUS:
 809                 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
 810                                             nla_len(frame), ack);
 811                 break;
 812         default:
 813                 break;
 814         }
 815 }
 816
 817
 818 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 819                                            struct nlattr *tb[])
 820 {
 821         union wpa_event_data data;
 822
 823         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 824         os_memset(&data, 0, sizeof(data));
 825         if (tb[NL80211_ATTR_MAC]) {
 826                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 827                             nla_data(tb[NL80211_ATTR_MAC]),
 828                             nla_len(tb[NL80211_ATTR_MAC]));
 829                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 830         }
 831         if (tb[NL80211_ATTR_KEY_SEQ]) {
 832                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 833                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 834                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 835         }
 836         if (tb[NL80211_ATTR_KEY_TYPE]) {
 837                 enum nl80211_key_type key_type =
 838                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 839                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 840                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 841                         data.michael_mic_failure.unicast = 1;
 842         } else
 843                 data.michael_mic_failure.unicast = 1;
 844
 845         if (tb[NL80211_ATTR_KEY_IDX]) {
 846                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 847                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 848         }
 849
 850         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 851 }
 852
 853
 854 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 855                                  struct nlattr *tb[])
 856 {
 857         if (tb[NL80211_ATTR_MAC] == NULL) {
 858                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 859                            "event");
 860                 return;
 861         }
 862         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 863         drv->associated = 1;
 864         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 865                    MAC2STR(drv->bssid));
 866
 867         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 868 }
 869
 870
 871 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
 872                                          int cancel_event, struct nlattr *tb[])
 873 {
 874         unsigned int freq, chan_type, duration;
 875         union wpa_event_data data;
 876         u64 cookie;
 877
 878         if (tb[NL80211_ATTR_WIPHY_FREQ])
 879                 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 880         else
 881                 freq = 0;
 882
 883         if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
 884                 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 885         else
 886                 chan_type = 0;
 887
 888         if (tb[NL80211_ATTR_DURATION])
 889                 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
 890         else
 891                 duration = 0;
 892
 893         if (tb[NL80211_ATTR_COOKIE])
 894                 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
 895         else
 896                 cookie = 0;
 897
 898         wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
 899                    "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
 900                    cancel_event, freq, chan_type, duration,
 901                    (long long unsigned int) cookie,
 902                    cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
 903
 904         if (cookie != drv->remain_on_chan_cookie)
 905                 return; /* not for us */
 906
 907         drv->pending_remain_on_chan = !cancel_event;
 908
 909         os_memset(&data, 0, sizeof(data));
 910         data.remain_on_channel.freq = freq;
 911         data.remain_on_channel.duration = duration;
 912         wpa_supplicant_event(drv->ctx, cancel_event ?
 913                              EVENT_CANCEL_REMAIN_ON_CHANNEL :
 914                              EVENT_REMAIN_ON_CHANNEL, &data);
 915 }
 916
 917
 918 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 919                             struct nlattr *tb[])
 920 {
 921         union wpa_event_data event;
 922         struct nlattr *nl;
 923         int rem;
 924         struct scan_info *info;
 925 #define MAX_REPORT_FREQS 50
 926         int freqs[MAX_REPORT_FREQS];
 927         int num_freqs = 0;
 928
 929         os_memset(&event, 0, sizeof(event));
 930         info = &event.scan_info;
 931         info->aborted = aborted;
 932
 933         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 934                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
 935                         struct wpa_driver_scan_ssid *s =
 936                                 &info->ssids[info->num_ssids];
 937                         s->ssid = nla_data(nl);
 938                         s->ssid_len = nla_len(nl);
 939                         info->num_ssids++;
 940                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
 941                                 break;
 942                 }
 943         }
 944         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 945                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
 946                 {
 947                         freqs[num_freqs] = nla_get_u32(nl);
 948                         num_freqs++;
 949                         if (num_freqs == MAX_REPORT_FREQS - 1)
 950                                 break;
 951                 }
 952                 info->freqs = freqs;
 953                 info->num_freqs = num_freqs;
 954         }
 955         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
 956 }
 957
 958
 959 static int get_link_signal(struct nl_msg *msg, void *arg)
 960 {
 961         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 962         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 963         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
 964         static struct nla_policy policy[NL80211_STA_INFO_MAX + 1] = {
 965                 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
 966         };
 967         int *sig = arg;
 968
 969         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 970                   genlmsg_attrlen(gnlh, 0), NULL);
 971         if (!tb[NL80211_ATTR_STA_INFO] ||
 972             nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
 973                              tb[NL80211_ATTR_STA_INFO], policy))
 974                 return NL_SKIP;
 975         if (!sinfo[NL80211_STA_INFO_SIGNAL])
 976                 return NL_SKIP;
 977
 978         *sig = (s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
 979         return NL_SKIP;
 980 }
 981
 982
 983 static int nl80211_get_link_signal(struct wpa_driver_nl80211_data *drv,
 984                                    int *sig)
 985 {
 986         struct nl_msg *msg;
 987
 988         *sig = -9999;
 989
 990         msg = nlmsg_alloc();
 991         if (!msg)
 992                 return -ENOMEM;
 993
 994         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 995                     0, NL80211_CMD_GET_STATION, 0);
 996
 997         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 998         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
 999
1000         return send_and_recv_msgs(drv, msg, get_link_signal, sig);
1001  nla_put_failure:
1002         return -ENOBUFS;
1003 }
1004
1005
1006 static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
1007                               struct nlattr *tb[])
1008 {
1009         static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
1010                 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
1011                 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
1012                 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
1013         };
1014         struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
1015         enum nl80211_cqm_rssi_threshold_event event;
1016         union wpa_event_data ed;
1017         int sig, res;
1018
1019         if (tb[NL80211_ATTR_CQM] == NULL ||
1020             nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
1021                              cqm_policy)) {
1022                 wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
1023                 return;
1024         }
1025
1026         if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
1027                 return;
1028         event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
1029
1030         os_memset(&ed, 0, sizeof(ed));
1031
1032         if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
1033                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1034                            "event: RSSI high");
1035                 ed.signal_change.above_threshold = 1;
1036         } else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
1037                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1038                            "event: RSSI low");
1039                 ed.signal_change.above_threshold = 0;
1040         } else
1041                 return;
1042
1043         res = nl80211_get_link_signal(drv, &sig);
1044         if (res == 0) {
1045                 ed.signal_change.current_signal = sig;
1046                 wpa_printf(MSG_DEBUG, "nl80211: Signal: %d dBm", sig);
1047         }
1048
1049         wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
1050 }
1051
1052
1053 static int process_event(struct nl_msg *msg, void *arg)
1054 {
1055         struct wpa_driver_nl80211_data *drv = arg;
1056         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1057         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1058         union wpa_event_data data;
1059
1060         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1061                   genlmsg_attrlen(gnlh, 0), NULL);
1062
1063         if (tb[NL80211_ATTR_IFINDEX]) {
1064                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1065                 if (ifindex != drv->ifindex && !have_ifidx(drv, ifindex)) {
1066                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
1067                                    " for foreign interface (ifindex %d)",
1068                                    gnlh->cmd, ifindex);
1069                         return NL_SKIP;
1070                 }
1071         }
1072
1073         if (drv->ap_scan_as_station &&
1074             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
1075              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
1076                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1077                                             IEEE80211_MODE_AP);
1078                 drv->ap_scan_as_station = 0;
1079         }
1080
1081         switch (gnlh->cmd) {
1082         case NL80211_CMD_TRIGGER_SCAN:
1083                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
1084                 break;
1085         case NL80211_CMD_NEW_SCAN_RESULTS:
1086                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
1087                 drv->scan_complete_events = 1;
1088                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1089                                      drv->ctx);
1090                 send_scan_event(drv, 0, tb);
1091                 break;
1092         case NL80211_CMD_SCAN_ABORTED:
1093                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
1094                 /*
1095                  * Need to indicate that scan results are available in order
1096                  * not to make wpa_supplicant stop its scanning.
1097                  */
1098                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1099                                      drv->ctx);
1100                 send_scan_event(drv, 1, tb);
1101                 break;
1102         case NL80211_CMD_AUTHENTICATE:
1103         case NL80211_CMD_ASSOCIATE:
1104         case NL80211_CMD_DEAUTHENTICATE:
1105         case NL80211_CMD_DISASSOCIATE:
1106         case NL80211_CMD_ACTION:
1107         case NL80211_CMD_ACTION_TX_STATUS:
1108                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
1109                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
1110                            tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
1111                            tb[NL80211_ATTR_COOKIE]);
1112                 break;
1113         case NL80211_CMD_CONNECT:
1114         case NL80211_CMD_ROAM:
1115                 mlme_event_connect(drv, gnlh->cmd,
1116                                    tb[NL80211_ATTR_STATUS_CODE],
1117                                    tb[NL80211_ATTR_MAC],
1118                                    tb[NL80211_ATTR_REQ_IE],
1119                                    tb[NL80211_ATTR_RESP_IE]);
1120                 break;
1121         case NL80211_CMD_DISCONNECT:
1122                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1123                         /*
1124                          * Avoid reporting two disassociation events that could
1125                          * confuse the core code.
1126                          */
1127                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
1128                                    "event when using userspace SME");
1129                         break;
1130                 }
1131                 drv->associated = 0;
1132                 os_memset(&data, 0, sizeof(data));
1133                 if (tb[NL80211_ATTR_REASON_CODE])
1134                         data.disassoc_info.reason_code =
1135                                 nla_get_u16(tb[NL80211_ATTR_REASON_CODE]);
1136                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, &data);
1137                 break;
1138         case NL80211_CMD_MICHAEL_MIC_FAILURE:
1139                 mlme_event_michael_mic_failure(drv, tb);
1140                 break;
1141         case NL80211_CMD_JOIN_IBSS:
1142                 mlme_event_join_ibss(drv, tb);
1143                 break;
1144         case NL80211_CMD_REMAIN_ON_CHANNEL:
1145                 mlme_event_remain_on_channel(drv, 0, tb);
1146                 break;
1147         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
1148                 mlme_event_remain_on_channel(drv, 1, tb);
1149                 break;
1150         case NL80211_CMD_NOTIFY_CQM:
1151                 nl80211_cqm_event(drv, tb);
1152                 break;
1153         default:
1154                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1155                            "(cmd=%d)", gnlh->cmd);
1156                 break;
1157         }
1158
1159         return NL_SKIP;
1160 }
1161
1162
1163 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1164                                              void *sock_ctx)
1165 {
1166         struct nl_cb *cb;
1167         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1168
1169         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1170
1171         cb = nl_cb_clone(drv->nl_cb);
1172         if (!cb)
1173                 return;
1174         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1175         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1176         nl_recvmsgs(drv->nl_handle_event, cb);
1177         nl_cb_put(cb);
1178 }
1179
1180
1181 /**
1182  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1183  * @priv: driver_nl80211 private data
1184  * @alpha2_arg: country to which to switch to
1185  * Returns: 0 on success, -1 on failure
1186  *
1187  * This asks nl80211 to set the regulatory domain for given
1188  * country ISO / IEC alpha2.
1189  */
1190 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1191 {
1192         struct i802_bss *bss = priv;
1193         struct wpa_driver_nl80211_data *drv = bss->drv;
1194         char alpha2[3];
1195         struct nl_msg *msg;
1196
1197         msg = nlmsg_alloc();
1198         if (!msg)
1199                 return -ENOMEM;
1200
1201         alpha2[0] = alpha2_arg[0];
1202         alpha2[1] = alpha2_arg[1];
1203         alpha2[2] = '\0';
1204
1205         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1206                     0, NL80211_CMD_REQ_SET_REG, 0);
1207
1208         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1209         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1210                 return -EINVAL;
1211         return 0;
1212 nla_put_failure:
1213         return -EINVAL;
1214 }
1215
1216
1217 #ifndef HOSTAPD
1218 struct wiphy_info_data {
1219         int max_scan_ssids;
1220         int ap_supported;
1221         int auth_supported;
1222         int connect_supported;
1223 };
1224
1225
1226 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1227 {
1228         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1229         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1230         struct wiphy_info_data *info = arg;
1231
1232         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1233                   genlmsg_attrlen(gnlh, 0), NULL);
1234
1235         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1236                 info->max_scan_ssids =
1237                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1238
1239         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1240                 struct nlattr *nl_mode;
1241                 int i;
1242                 nla_for_each_nested(nl_mode,
1243                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1244                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1245                                 info->ap_supported = 1;
1246                                 break;
1247                         }
1248                 }
1249         }
1250
1251         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1252                 struct nlattr *nl_cmd;
1253                 int i;
1254
1255                 nla_for_each_nested(nl_cmd,
1256                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1257                         u32 cmd = nla_get_u32(nl_cmd);
1258                         if (cmd == NL80211_CMD_AUTHENTICATE)
1259                                 info->auth_supported = 1;
1260                         else if (cmd == NL80211_CMD_CONNECT)
1261                                 info->connect_supported = 1;
1262                 }
1263         }
1264
1265         return NL_SKIP;
1266 }
1267
1268
1269 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1270                                        struct wiphy_info_data *info)
1271 {
1272         struct nl_msg *msg;
1273
1274         os_memset(info, 0, sizeof(*info));
1275         msg = nlmsg_alloc();
1276         if (!msg)
1277                 return -1;
1278
1279         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1280                     0, NL80211_CMD_GET_WIPHY, 0);
1281
1282         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1283
1284         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1285                 return 0;
1286         msg = NULL;
1287 nla_put_failure:
1288         nlmsg_free(msg);
1289         return -1;
1290 }
1291
1292
1293 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1294 {
1295         struct wiphy_info_data info;
1296         if (wpa_driver_nl80211_get_info(drv, &info))
1297                 return -1;
1298         drv->has_capability = 1;
1299         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1300         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1301                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1302                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1303                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1304         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1305                 WPA_DRIVER_CAPA_ENC_WEP104 |
1306                 WPA_DRIVER_CAPA_ENC_TKIP |
1307                 WPA_DRIVER_CAPA_ENC_CCMP;
1308         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1309                 WPA_DRIVER_AUTH_SHARED |
1310                 WPA_DRIVER_AUTH_LEAP;
1311
1312         drv->capa.max_scan_ssids = info.max_scan_ssids;
1313         if (info.ap_supported)
1314                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1315
1316         if (info.auth_supported)
1317                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1318         else if (!info.connect_supported) {
1319                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1320                            "authentication/association or connect commands");
1321                 return -1;
1322         }
1323
1324         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1325         drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CAPABLE;
1326         drv->capa.max_remain_on_chan = 5000;
1327
1328         return 0;
1329 }
1330 #endif /* HOSTAPD */
1331
1332
1333 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
1334 {
1335         int ret;
1336
1337         /* Initialize generic netlink and nl80211 */
1338
1339         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1340         if (drv->nl_cb == NULL) {
1341                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1342                            "callbacks");
1343                 goto err1;
1344         }
1345
1346         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1347         if (drv->nl_handle == NULL) {
1348                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1349                            "callbacks");
1350                 goto err2;
1351         }
1352
1353         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1354         if (drv->nl_handle_event == NULL) {
1355                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1356                            "callbacks (event)");
1357                 goto err2b;
1358         }
1359
1360         if (genl_connect(drv->nl_handle)) {
1361                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1362                            "netlink");
1363                 goto err3;
1364         }
1365
1366         if (genl_connect(drv->nl_handle_event)) {
1367                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1368                            "netlink (event)");
1369                 goto err3;
1370         }
1371
1372 #ifdef CONFIG_LIBNL20
1373         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1374                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1375                            "netlink cache");
1376                 goto err3;
1377         }
1378         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1379             0) {
1380                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1381                            "netlink cache (event)");
1382                 goto err3b;
1383         }
1384 #else /* CONFIG_LIBNL20 */
1385         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1386         if (drv->nl_cache == NULL) {
1387                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1388                            "netlink cache");
1389                 goto err3;
1390         }
1391         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1392         if (drv->nl_cache_event == NULL) {
1393                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1394                            "netlink cache (event)");
1395                 goto err3b;
1396         }
1397 #endif /* CONFIG_LIBNL20 */
1398
1399         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1400         if (drv->nl80211 == NULL) {
1401                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1402                            "found");
1403                 goto err4;
1404         }
1405
1406         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1407         if (ret >= 0)
1408                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1409         if (ret < 0) {
1410                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1411                            "membership for scan events: %d (%s)",
1412                            ret, strerror(-ret));
1413                 goto err4;
1414         }
1415
1416         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1417         if (ret >= 0)
1418                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1419         if (ret < 0) {
1420                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1421                            "membership for mlme events: %d (%s)",
1422                            ret, strerror(-ret));
1423                 goto err4;
1424         }
1425
1426         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1427                                  wpa_driver_nl80211_event_receive, drv, NULL);
1428
1429         return 0;
1430
1431 err4:
1432         nl_cache_free(drv->nl_cache_event);
1433 err3b:
1434         nl_cache_free(drv->nl_cache);
1435 err3:
1436         nl_handle_destroy(drv->nl_handle_event);
1437 err2b:
1438         nl_handle_destroy(drv->nl_handle);
1439 err2:
1440         nl_cb_put(drv->nl_cb);
1441 err1:
1442         return -1;
1443 }
1444
1445
1446 static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
1447 {
1448         wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");
1449         /*
1450          * This may be for any interface; use ifdown event to disable
1451          * interface.
1452          */
1453 }
1454
1455
1456 static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
1457 {
1458         struct wpa_driver_nl80211_data *drv = ctx;
1459         wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
1460         if (linux_set_iface_flags(drv->ioctl_sock, drv->first_bss.ifname, 1)) {
1461                 wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
1462                            "after rfkill unblock");
1463                 return;
1464         }
1465         /* rtnetlink ifup handler will report interface as enabled */
1466 }
1467
1468
1469 /**
1470  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1471  * @ctx: context to be used when calling wpa_supplicant functions,
1472  * e.g., wpa_supplicant_event()
1473  * @ifname: interface name, e.g., wlan0
1474  * Returns: Pointer to private data, %NULL on failure
1475  */
1476 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1477 {
1478         struct wpa_driver_nl80211_data *drv;
1479         struct netlink_config *cfg;
1480         struct rfkill_config *rcfg;
1481         struct i802_bss *bss;
1482
1483         drv = os_zalloc(sizeof(*drv));
1484         if (drv == NULL)
1485                 return NULL;
1486         drv->ctx = ctx;
1487         bss = &drv->first_bss;
1488         bss->drv = drv;
1489         os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
1490         drv->monitor_ifidx = -1;
1491         drv->monitor_sock = -1;
1492         drv->ioctl_sock = -1;
1493
1494         if (wpa_driver_nl80211_init_nl(drv)) {
1495                 os_free(drv);
1496                 return NULL;
1497         }
1498
1499         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1500         if (drv->ioctl_sock < 0) {
1501                 perror("socket(PF_INET,SOCK_DGRAM)");
1502                 goto failed;
1503         }
1504
1505         cfg = os_zalloc(sizeof(*cfg));
1506         if (cfg == NULL)
1507                 goto failed;
1508         cfg->ctx = drv;
1509         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1510         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1511         drv->netlink = netlink_init(cfg);
1512         if (drv->netlink == NULL) {
1513                 os_free(cfg);
1514                 goto failed;
1515         }
1516
1517         rcfg = os_zalloc(sizeof(*rcfg));
1518         if (rcfg == NULL)
1519                 goto failed;
1520         rcfg->ctx = drv;
1521         os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
1522         rcfg->blocked_cb = wpa_driver_nl80211_rfkill_blocked;
1523         rcfg->unblocked_cb = wpa_driver_nl80211_rfkill_unblocked;
1524         drv->rfkill = rfkill_init(rcfg);
1525         if (drv->rfkill == NULL) {
1526                 wpa_printf(MSG_DEBUG, "nl80211: RFKILL status not available");
1527                 os_free(rcfg);
1528         }
1529
1530         if (wpa_driver_nl80211_finish_drv_init(drv))
1531                 goto failed;
1532
1533         return bss;
1534
1535 failed:
1536         rfkill_deinit(drv->rfkill);
1537         netlink_deinit(drv->netlink);
1538         if (drv->ioctl_sock >= 0)
1539                 close(drv->ioctl_sock);
1540
1541         genl_family_put(drv->nl80211);
1542         nl_cache_free(drv->nl_cache);
1543         nl_handle_destroy(drv->nl_handle);
1544         nl_cb_put(drv->nl_cb);
1545         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1546
1547         os_free(drv);
1548         return NULL;
1549 }
1550
1551
1552 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1553                                          const u8 *match, size_t match_len)
1554 {
1555         struct nl_msg *msg;
1556         int ret = -1;
1557
1558         msg = nlmsg_alloc();
1559         if (!msg)
1560                 return -1;
1561
1562         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1563                     NL80211_CMD_REGISTER_ACTION, 0);
1564
1565         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1566         NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1567
1568         ret = send_and_recv(drv, drv->nl_handle_event, msg, NULL, NULL);
1569         msg = NULL;
1570         if (ret) {
1571                 wpa_printf(MSG_DEBUG, "nl80211: Register Action command "
1572                            "failed: ret=%d (%s)", ret, strerror(-ret));
1573                 wpa_hexdump(MSG_DEBUG, "nl80211: Register Action match",
1574                             match, match_len);
1575                 goto nla_put_failure;
1576         }
1577         ret = 0;
1578 nla_put_failure:
1579         nlmsg_free(msg);
1580         return ret;
1581 }
1582
1583
1584 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1585 {
1586 #ifdef CONFIG_P2P
1587         /* GAS Initial Request */
1588         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0a", 2) < 0)
1589                 return -1;
1590         /* GAS Initial Response */
1591         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0b", 2) < 0)
1592                 return -1;
1593         /* GAS Comeback Request */
1594         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0c", 2) < 0)
1595                 return -1;
1596         /* GAS Comeback Response */
1597         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0d", 2) < 0)
1598                 return -1;
1599         /* P2P Public Action */
1600         if (nl80211_register_action_frame(drv,
1601                                           (u8 *) "\x04\x09\x50\x6f\x9a\x09",
1602                                           6) < 0)
1603                 return -1;
1604         /* P2P Action */
1605         if (nl80211_register_action_frame(drv,
1606                                           (u8 *) "\x7f\x50\x6f\x9a\x09",
1607                                           5) < 0)
1608                 return -1;
1609 #endif /* CONFIG_P2P */
1610
1611         /* FT Action frames */
1612         if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
1613                 return -1;
1614         else
1615                 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
1616                         WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
1617
1618         return 0;
1619 }
1620
1621
1622 static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
1623 {
1624         wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
1625 }
1626
1627
1628 static int
1629 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1630 {
1631         struct i802_bss *bss = &drv->first_bss;
1632         int send_rfkill_event = 0;
1633
1634         drv->ifindex = if_nametoindex(bss->ifname);
1635         drv->first_bss.ifindex = drv->ifindex;
1636
1637 #ifndef HOSTAPD
1638         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
1639                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1640                            "use managed mode");
1641         }
1642
1643         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
1644                 if (rfkill_is_blocked(drv->rfkill)) {
1645                         wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
1646                                    "interface '%s' due to rfkill",
1647                                    bss->ifname);
1648                         drv->if_disabled = 1;
1649                         send_rfkill_event = 1;
1650                 } else {
1651                         wpa_printf(MSG_ERROR, "nl80211: Could not set "
1652                                    "interface '%s' UP", bss->ifname);
1653                         return -1;
1654                 }
1655         }
1656
1657         if (wpa_driver_nl80211_capa(drv))
1658                 return -1;
1659
1660         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1661                                1, IF_OPER_DORMANT);
1662 #endif /* HOSTAPD */
1663
1664         if (nl80211_register_action_frames(drv) < 0) {
1665                 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
1666                            "frame processing - ignore for now");
1667                 /*
1668                  * Older kernel versions did not support this, so ignore the
1669                  * error for now. Some functionality may not be available
1670                  * because of this.
1671                  */
1672         }
1673
1674         if (send_rfkill_event) {
1675                 eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
1676                                        drv, drv->ctx);
1677         }
1678
1679         return 0;
1680 }
1681
1682
1683 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1684 {
1685         struct nl_msg *msg;
1686
1687         msg = nlmsg_alloc();
1688         if (!msg)
1689                 return -ENOMEM;
1690
1691         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1692                     0, NL80211_CMD_DEL_BEACON, 0);
1693         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1694
1695         return send_and_recv_msgs(drv, msg, NULL, NULL);
1696  nla_put_failure:
1697         return -ENOBUFS;
1698 }
1699
1700
1701 /**
1702  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1703  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1704  *
1705  * Shut down driver interface and processing of driver events. Free
1706  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1707  */
1708 static void wpa_driver_nl80211_deinit(void *priv)
1709 {
1710         struct i802_bss *bss = priv;
1711         struct wpa_driver_nl80211_data *drv = bss->drv;
1712
1713         if (drv->added_if_into_bridge) {
1714                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
1715                     < 0)
1716                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1717                                    "interface %s from bridge %s: %s",
1718                                    bss->ifname, drv->brname, strerror(errno));
1719         }
1720         if (drv->added_bridge) {
1721                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1722                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1723                                    "bridge %s: %s",
1724                                    drv->brname, strerror(errno));
1725         }
1726
1727         nl80211_remove_monitor_interface(drv);
1728
1729         if (drv->nlmode == NL80211_IFTYPE_AP)
1730                 wpa_driver_nl80211_del_beacon(drv);
1731
1732 #ifdef HOSTAPD
1733         if (drv->last_freq_ht) {
1734                 /* Clear HT flags from the driver */
1735                 struct hostapd_freq_params freq;
1736                 os_memset(&freq, 0, sizeof(freq));
1737                 freq.freq = drv->last_freq;
1738                 i802_set_freq(priv, &freq);
1739         }
1740
1741         if (drv->eapol_sock >= 0) {
1742                 eloop_unregister_read_sock(drv->eapol_sock);
1743                 close(drv->eapol_sock);
1744         }
1745
1746         if (drv->if_indices != drv->default_if_indices)
1747                 os_free(drv->if_indices);
1748 #endif /* HOSTAPD */
1749
1750         if (drv->disable_11b_rates)
1751                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1752
1753         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1754         netlink_deinit(drv->netlink);
1755         rfkill_deinit(drv->rfkill);
1756
1757         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1758
1759         (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
1760         wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
1761
1762         if (drv->ioctl_sock >= 0)
1763                 close(drv->ioctl_sock);
1764
1765         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1766         genl_family_put(drv->nl80211);
1767         nl_cache_free(drv->nl_cache);
1768         nl_cache_free(drv->nl_cache_event);
1769         nl_handle_destroy(drv->nl_handle);
1770         nl_handle_destroy(drv->nl_handle_event);
1771         nl_cb_put(drv->nl_cb);
1772
1773         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1774                              drv, NULL);
1775
1776         os_free(drv->filter_ssids);
1777
1778         os_free(drv);
1779 }
1780
1781
1782 /**
1783  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1784  * @eloop_ctx: Driver private data
1785  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1786  *
1787  * This function can be used as registered timeout when starting a scan to
1788  * generate a scan completed event if the driver does not report this.
1789  */
1790 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1791 {
1792         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1793         if (drv->ap_scan_as_station) {
1794                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1795                                             IEEE80211_MODE_AP);
1796                 drv->ap_scan_as_station = 0;
1797         }
1798         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1799         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1800 }
1801
1802
1803 /**
1804  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1805  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1806  * @params: Scan parameters
1807  * Returns: 0 on success, -1 on failure
1808  */
1809 static int wpa_driver_nl80211_scan(void *priv,
1810                                    struct wpa_driver_scan_params *params)
1811 {
1812         struct i802_bss *bss = priv;
1813         struct wpa_driver_nl80211_data *drv = bss->drv;
1814         int ret = 0, timeout;
1815         struct nl_msg *msg, *ssids, *freqs;
1816         size_t i;
1817
1818         msg = nlmsg_alloc();
1819         ssids = nlmsg_alloc();
1820         freqs = nlmsg_alloc();
1821         if (!msg || !ssids || !freqs) {
1822                 nlmsg_free(msg);
1823                 nlmsg_free(ssids);
1824                 nlmsg_free(freqs);
1825                 return -1;
1826         }
1827
1828         os_free(drv->filter_ssids);
1829         drv->filter_ssids = params->filter_ssids;
1830         params->filter_ssids = NULL;
1831         drv->num_filter_ssids = params->num_filter_ssids;
1832
1833         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1834                     NL80211_CMD_TRIGGER_SCAN, 0);
1835
1836         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1837
1838         for (i = 0; i < params->num_ssids; i++) {
1839                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
1840                                   params->ssids[i].ssid,
1841                                   params->ssids[i].ssid_len);
1842                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1843                         params->ssids[i].ssid);
1844         }
1845         if (params->num_ssids)
1846                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1847
1848         if (params->extra_ies) {
1849                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
1850                                   params->extra_ies, params->extra_ies_len);
1851                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1852                         params->extra_ies);
1853         }
1854
1855         if (params->freqs) {
1856                 for (i = 0; params->freqs[i]; i++) {
1857                         wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
1858                                    "MHz", params->freqs[i]);
1859                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1860                 }
1861                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1862         }
1863
1864         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1865         msg = NULL;
1866         if (ret) {
1867                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1868                            "(%s)", ret, strerror(-ret));
1869 #ifdef HOSTAPD
1870                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1871                         /*
1872                          * mac80211 does not allow scan requests in AP mode, so
1873                          * try to do this in station mode.
1874                          */
1875                         if (wpa_driver_nl80211_set_mode(bss,
1876                                                         IEEE80211_MODE_INFRA))
1877                                 goto nla_put_failure;
1878
1879                         if (wpa_driver_nl80211_scan(drv, params)) {
1880                                 wpa_driver_nl80211_set_mode(bss,
1881                                                             IEEE80211_MODE_AP);
1882                                 goto nla_put_failure;
1883                         }
1884
1885                         /* Restore AP mode when processing scan results */
1886                         drv->ap_scan_as_station = 1;
1887                         ret = 0;
1888                 } else
1889                         goto nla_put_failure;
1890 #else /* HOSTAPD */
1891                 goto nla_put_failure;
1892 #endif /* HOSTAPD */
1893         }
1894
1895         /* Not all drivers generate "scan completed" wireless event, so try to
1896          * read results after a timeout. */
1897         timeout = 10;
1898         if (drv->scan_complete_events) {
1899                 /*
1900                  * The driver seems to deliver events to notify when scan is
1901                  * complete, so use longer timeout to avoid race conditions
1902                  * with scanning and following association request.
1903                  */
1904                 timeout = 30;
1905         }
1906         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1907                    "seconds", ret, timeout);
1908         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1909         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1910                                drv, drv->ctx);
1911
1912 nla_put_failure:
1913         nlmsg_free(ssids);
1914         nlmsg_free(msg);
1915         nlmsg_free(freqs);
1916         return ret;
1917 }
1918
1919
1920 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
1921 {
1922         const u8 *end, *pos;
1923
1924         if (ies == NULL)
1925                 return NULL;
1926
1927         pos = ies;
1928         end = ies + ies_len;
1929
1930         while (pos + 1 < end) {
1931                 if (pos + 2 + pos[1] > end)
1932                         break;
1933                 if (pos[0] == ie)
1934                         return pos;
1935                 pos += 2 + pos[1];
1936         }
1937
1938         return NULL;
1939 }
1940
1941
1942 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
1943                                  const u8 *ie, size_t ie_len)
1944 {
1945         const u8 *ssid;
1946         size_t i;
1947
1948         if (drv->filter_ssids == NULL)
1949                 return 0;
1950
1951         ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
1952         if (ssid == NULL)
1953                 return 1;
1954
1955         for (i = 0; i < drv->num_filter_ssids; i++) {
1956                 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
1957                     os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
1958                     0)
1959                         return 0;
1960         }
1961
1962         return 1;
1963 }
1964
1965
1966 struct nl80211_bss_info_arg {
1967         struct wpa_driver_nl80211_data *drv;
1968         struct wpa_scan_results *res;
1969 };
1970
1971 static int bss_info_handler(struct nl_msg *msg, void *arg)
1972 {
1973         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1974         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1975         struct nlattr *bss[NL80211_BSS_MAX + 1];
1976         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1977                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1978                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1979                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1980                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1981                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1982                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1983                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1984                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1985                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1986                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1987                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
1988         };
1989         struct nl80211_bss_info_arg *_arg = arg;
1990         struct wpa_scan_results *res = _arg->res;
1991         struct wpa_scan_res **tmp;
1992         struct wpa_scan_res *r;
1993         const u8 *ie, *beacon_ie;
1994         size_t ie_len, beacon_ie_len;
1995         u8 *pos;
1996
1997         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1998                   genlmsg_attrlen(gnlh, 0), NULL);
1999         if (!tb[NL80211_ATTR_BSS])
2000                 return NL_SKIP;
2001         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2002                              bss_policy))
2003                 return NL_SKIP;
2004         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
2005                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2006                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2007         } else {
2008                 ie = NULL;
2009                 ie_len = 0;
2010         }
2011         if (bss[NL80211_BSS_BEACON_IES]) {
2012                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
2013                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
2014         } else {
2015                 beacon_ie = NULL;
2016                 beacon_ie_len = 0;
2017         }
2018
2019         if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
2020                                   ie ? ie_len : beacon_ie_len))
2021                 return NL_SKIP;
2022
2023         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
2024         if (r == NULL)
2025                 return NL_SKIP;
2026         if (bss[NL80211_BSS_BSSID])
2027                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
2028                           ETH_ALEN);
2029         if (bss[NL80211_BSS_FREQUENCY])
2030                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2031         if (bss[NL80211_BSS_BEACON_INTERVAL])
2032                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
2033         if (bss[NL80211_BSS_CAPABILITY])
2034                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2035         r->flags |= WPA_SCAN_NOISE_INVALID;
2036         if (bss[NL80211_BSS_SIGNAL_MBM]) {
2037                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
2038                 r->level /= 100; /* mBm to dBm */
2039                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
2040         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
2041                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
2042                 r->flags |= WPA_SCAN_LEVEL_INVALID;
2043         } else
2044                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
2045         if (bss[NL80211_BSS_TSF])
2046                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
2047         if (bss[NL80211_BSS_SEEN_MS_AGO])
2048                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
2049         r->ie_len = ie_len;
2050         pos = (u8 *) (r + 1);
2051         if (ie) {
2052                 os_memcpy(pos, ie, ie_len);
2053                 pos += ie_len;
2054         }
2055         r->beacon_ie_len = beacon_ie_len;
2056         if (beacon_ie)
2057                 os_memcpy(pos, beacon_ie, beacon_ie_len);
2058
2059         if (bss[NL80211_BSS_STATUS]) {
2060                 enum nl80211_bss_status status;
2061                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
2062                 switch (status) {
2063                 case NL80211_BSS_STATUS_AUTHENTICATED:
2064                         r->flags |= WPA_SCAN_AUTHENTICATED;
2065                         break;
2066                 case NL80211_BSS_STATUS_ASSOCIATED:
2067                         r->flags |= WPA_SCAN_ASSOCIATED;
2068                         break;
2069                 default:
2070                         break;
2071                 }
2072         }
2073
2074         tmp = os_realloc(res->res,
2075                          (res->num + 1) * sizeof(struct wpa_scan_res *));
2076         if (tmp == NULL) {
2077                 os_free(r);
2078                 return NL_SKIP;
2079         }
2080         tmp[res->num++] = r;
2081         res->res = tmp;
2082
2083         return NL_SKIP;
2084 }
2085
2086
2087 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
2088                                  const u8 *addr)
2089 {
2090         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
2091                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
2092                            "mismatch (" MACSTR ")", MAC2STR(addr));
2093                 wpa_driver_nl80211_mlme(drv, addr,
2094                                         NL80211_CMD_DEAUTHENTICATE,
2095                                         WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
2096         }
2097 }
2098
2099
2100 static void wpa_driver_nl80211_check_bss_status(
2101         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
2102 {
2103         size_t i;
2104
2105         for (i = 0; i < res->num; i++) {
2106                 struct wpa_scan_res *r = res->res[i];
2107                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
2108                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2109                                    "indicates BSS status with " MACSTR
2110                                    " as authenticated",
2111                                    MAC2STR(r->bssid));
2112                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2113                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
2114                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
2115                             0) {
2116                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
2117                                            " in local state (auth=" MACSTR
2118                                            " assoc=" MACSTR ")",
2119                                            MAC2STR(drv->auth_bssid),
2120                                            MAC2STR(drv->bssid));
2121                                 clear_state_mismatch(drv, r->bssid);
2122                         }
2123                 }
2124
2125                 if (r->flags & WPA_SCAN_ASSOCIATED) {
2126                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2127                                    "indicate BSS status with " MACSTR
2128                                    " as associated",
2129                                    MAC2STR(r->bssid));
2130                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2131                             !drv->associated) {
2132                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2133                                            "(not associated) does not match "
2134                                            "with BSS state");
2135                                 clear_state_mismatch(drv, r->bssid);
2136                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
2137                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
2138                                    0) {
2139                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2140                                            "(associated with " MACSTR ") does "
2141                                            "not match with BSS state",
2142                                            MAC2STR(drv->bssid));
2143                                 clear_state_mismatch(drv, r->bssid);
2144                                 clear_state_mismatch(drv, drv->bssid);
2145                         }
2146                 }
2147         }
2148 }
2149
2150
2151 static void wpa_scan_results_free(struct wpa_scan_results *res)
2152 {
2153         size_t i;
2154
2155         if (res == NULL)
2156                 return;
2157
2158         for (i = 0; i < res->num; i++)
2159                 os_free(res->res[i]);
2160         os_free(res->res);
2161         os_free(res);
2162 }
2163
2164
2165 static struct wpa_scan_results *
2166 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
2167 {
2168         struct nl_msg *msg;
2169         struct wpa_scan_results *res;
2170         int ret;
2171         struct nl80211_bss_info_arg arg;
2172
2173         res = os_zalloc(sizeof(*res));
2174         if (res == NULL)
2175                 return NULL;
2176         msg = nlmsg_alloc();
2177         if (!msg)
2178                 goto nla_put_failure;
2179
2180         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
2181                     NL80211_CMD_GET_SCAN, 0);
2182         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2183
2184         arg.drv = drv;
2185         arg.res = res;
2186         ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
2187         msg = NULL;
2188         if (ret == 0) {
2189                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
2190                            (unsigned long) res->num);
2191                 return res;
2192         }
2193         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
2194                    "(%s)", ret, strerror(-ret));
2195 nla_put_failure:
2196         nlmsg_free(msg);
2197         wpa_scan_results_free(res);
2198         return NULL;
2199 }
2200
2201
2202 /**
2203  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
2204  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2205  * Returns: Scan results on success, -1 on failure
2206  */
2207 static struct wpa_scan_results *
2208 wpa_driver_nl80211_get_scan_results(void *priv)
2209 {
2210         struct i802_bss *bss = priv;
2211         struct wpa_driver_nl80211_data *drv = bss->drv;
2212         struct wpa_scan_results *res;
2213
2214         res = nl80211_get_scan_results(drv);
2215         if (res)
2216                 wpa_driver_nl80211_check_bss_status(drv, res);
2217         return res;
2218 }
2219
2220
2221 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
2222 {
2223         struct wpa_scan_results *res;
2224         size_t i;
2225
2226         res = nl80211_get_scan_results(drv);
2227         if (res == NULL) {
2228                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
2229                 return;
2230         }
2231
2232         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
2233         for (i = 0; i < res->num; i++) {
2234                 struct wpa_scan_res *r = res->res[i];
2235                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
2236                            (int) i, (int) res->num, MAC2STR(r->bssid),
2237                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
2238                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
2239         }
2240
2241         wpa_scan_results_free(res);
2242 }
2243
2244
2245 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
2246                                       enum wpa_alg alg, const u8 *addr,
2247                                       int key_idx, int set_tx,
2248                                       const u8 *seq, size_t seq_len,
2249                                       const u8 *key, size_t key_len)
2250 {
2251         struct i802_bss *bss = priv;
2252         struct wpa_driver_nl80211_data *drv = bss->drv;
2253         int ifindex = if_nametoindex(ifname);
2254         struct nl_msg *msg;
2255         int ret;
2256
2257         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
2258                    "set_tx=%d seq_len=%lu key_len=%lu",
2259                    __func__, ifindex, alg, addr, key_idx, set_tx,
2260                    (unsigned long) seq_len, (unsigned long) key_len);
2261
2262         msg = nlmsg_alloc();
2263         if (!msg)
2264                 return -ENOMEM;
2265
2266         if (alg == WPA_ALG_NONE) {
2267                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2268                             0, NL80211_CMD_DEL_KEY, 0);
2269         } else {
2270                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2271                             0, NL80211_CMD_NEW_KEY, 0);
2272                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2273                 switch (alg) {
2274                 case WPA_ALG_WEP:
2275                         if (key_len == 5)
2276                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2277                                             WLAN_CIPHER_SUITE_WEP40);
2278                         else
2279                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2280                                             WLAN_CIPHER_SUITE_WEP104);
2281                         break;
2282                 case WPA_ALG_TKIP:
2283                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2284                                     WLAN_CIPHER_SUITE_TKIP);
2285                         break;
2286                 case WPA_ALG_CCMP:
2287                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2288                                     WLAN_CIPHER_SUITE_CCMP);
2289                         break;
2290                 case WPA_ALG_IGTK:
2291                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2292                                     WLAN_CIPHER_SUITE_AES_CMAC);
2293                         break;
2294                 default:
2295                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2296                                    "algorithm %d", __func__, alg);
2297                         nlmsg_free(msg);
2298                         return -1;
2299                 }
2300         }
2301
2302         if (seq && seq_len)
2303                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
2304
2305         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2306         {
2307                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
2308                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2309         }
2310         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2311         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2312
2313         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2314         if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
2315                 ret = 0;
2316         if (ret)
2317                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2318                            ret, strerror(-ret));
2319
2320         /*
2321          * If we failed or don't need to set the default TX key (below),
2322          * we're done here.
2323          */
2324         if (ret || !set_tx || alg == WPA_ALG_NONE)
2325                 return ret;
2326 #ifdef HOSTAPD
2327         if (addr)
2328                 return ret;
2329 #else /* HOSTAPD */
2330         if (drv->nlmode == NL80211_IFTYPE_AP && addr)
2331                 return ret;
2332 #endif /* HOSTAPD */
2333
2334         msg = nlmsg_alloc();
2335         if (!msg)
2336                 return -ENOMEM;
2337
2338         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2339                     0, NL80211_CMD_SET_KEY, 0);
2340         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2341         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2342         if (alg == WPA_ALG_IGTK)
2343                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2344         else
2345                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2346
2347         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2348         if (ret == -ENOENT)
2349                 ret = 0;
2350         if (ret)
2351                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2352                            "err=%d %s)", ret, strerror(-ret));
2353         return ret;
2354
2355 nla_put_failure:
2356         return -ENOBUFS;
2357 }
2358
2359
2360 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2361                       int key_idx, int defkey,
2362                       const u8 *seq, size_t seq_len,
2363                       const u8 *key, size_t key_len)
2364 {
2365         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2366         if (!key_attr)
2367                 return -1;
2368
2369         if (defkey && alg == WPA_ALG_IGTK)
2370                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2371         else if (defkey)
2372                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2373
2374         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2375
2376         switch (alg) {
2377         case WPA_ALG_WEP:
2378                 if (key_len == 5)
2379                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2380                                     WLAN_CIPHER_SUITE_WEP40);
2381                 else
2382                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2383                                     WLAN_CIPHER_SUITE_WEP104);
2384                 break;
2385         case WPA_ALG_TKIP:
2386                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2387                 break;
2388         case WPA_ALG_CCMP:
2389                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2390                 break;
2391         case WPA_ALG_IGTK:
2392                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2393                             WLAN_CIPHER_SUITE_AES_CMAC);
2394                 break;
2395         default:
2396                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2397                            "algorithm %d", __func__, alg);
2398                 return -1;
2399         }
2400
2401         if (seq && seq_len)
2402                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2403
2404         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2405
2406         nla_nest_end(msg, key_attr);
2407
2408         return 0;
2409  nla_put_failure:
2410         return -1;
2411 }
2412
2413
2414 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2415                                  struct nl_msg *msg)
2416 {
2417         int i, privacy = 0;
2418         struct nlattr *nl_keys, *nl_key;
2419
2420         for (i = 0; i < 4; i++) {
2421                 if (!params->wep_key[i])
2422                         continue;
2423                 privacy = 1;
2424                 break;
2425         }
2426         if (!privacy)
2427                 return 0;
2428
2429         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2430
2431         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2432         if (!nl_keys)
2433                 goto nla_put_failure;
2434
2435         for (i = 0; i < 4; i++) {
2436                 if (!params->wep_key[i])
2437                         continue;
2438
2439                 nl_key = nla_nest_start(msg, i);
2440                 if (!nl_key)
2441                         goto nla_put_failure;
2442
2443                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2444                         params->wep_key[i]);
2445                 if (params->wep_key_len[i] == 5)
2446                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2447                                     WLAN_CIPHER_SUITE_WEP40);
2448                 else
2449                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2450                                     WLAN_CIPHER_SUITE_WEP104);
2451
2452                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2453
2454                 if (i == params->wep_tx_keyidx)
2455                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2456
2457                 nla_nest_end(msg, nl_key);
2458         }
2459         nla_nest_end(msg, nl_keys);
2460
2461         return 0;
2462
2463 nla_put_failure:
2464         return -ENOBUFS;
2465 }
2466
2467
2468 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2469                                    const u8 *addr, int cmd, u16 reason_code,
2470                                    int local_state_change)
2471 {
2472         int ret = -1;
2473         struct nl_msg *msg;
2474
2475         msg = nlmsg_alloc();
2476         if (!msg)
2477                 return -1;
2478
2479         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2480
2481         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2482         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2483         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2484         if (local_state_change)
2485                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2486
2487         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2488         msg = NULL;
2489         if (ret) {
2490                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2491                            "(%s)", ret, strerror(-ret));
2492                 goto nla_put_failure;
2493         }
2494         ret = 0;
2495
2496 nla_put_failure:
2497         nlmsg_free(msg);
2498         return ret;
2499 }
2500
2501
2502 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2503                                          const u8 *addr, int reason_code)
2504 {
2505         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2506                    __func__, MAC2STR(addr), reason_code);
2507         drv->associated = 0;
2508         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2509                                        reason_code, 0);
2510 }
2511
2512
2513 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2514                                              int reason_code)
2515 {
2516         struct i802_bss *bss = priv;
2517         struct wpa_driver_nl80211_data *drv = bss->drv;
2518         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2519                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2520         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2521                    __func__, MAC2STR(addr), reason_code);
2522         drv->associated = 0;
2523         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2524                                        reason_code, 0);
2525 }
2526
2527
2528 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2529                                            int reason_code)
2530 {
2531         struct i802_bss *bss = priv;
2532         struct wpa_driver_nl80211_data *drv = bss->drv;
2533         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2534                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2535         wpa_printf(MSG_DEBUG, "%s", __func__);
2536         drv->associated = 0;
2537         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2538                                        reason_code, 0);
2539 }
2540
2541
2542 static int wpa_driver_nl80211_authenticate(
2543         void *priv, struct wpa_driver_auth_params *params)
2544 {
2545         struct i802_bss *bss = priv;
2546         struct wpa_driver_nl80211_data *drv = bss->drv;
2547         int ret = -1, i;
2548         struct nl_msg *msg;
2549         enum nl80211_auth_type type;
2550         int count = 0;
2551
2552         drv->associated = 0;
2553         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2554         /* FIX: IBSS mode */
2555         if (drv->nlmode != NL80211_IFTYPE_STATION)
2556                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2557
2558         if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2559                 return -1;
2560
2561 retry:
2562         msg = nlmsg_alloc();
2563         if (!msg)
2564                 return -1;
2565
2566         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2567                    drv->ifindex);
2568
2569         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2570                     NL80211_CMD_AUTHENTICATE, 0);
2571
2572         for (i = 0; i < 4; i++) {
2573                 if (!params->wep_key[i])
2574                         continue;
2575                 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
2576                                            NULL, i,
2577                                            i == params->wep_tx_keyidx, NULL, 0,
2578                                            params->wep_key[i],
2579                                            params->wep_key_len[i]);
2580                 if (params->wep_tx_keyidx != i)
2581                         continue;
2582                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2583                                params->wep_key[i], params->wep_key_len[i])) {
2584                         nlmsg_free(msg);
2585                         return -1;
2586                 }
2587         }
2588
2589         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2590         if (params->bssid) {
2591                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2592                            MAC2STR(params->bssid));
2593                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2594         }
2595         if (params->freq) {
2596                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2597                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2598         }
2599         if (params->ssid) {
2600                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2601                                   params->ssid, params->ssid_len);
2602                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2603                         params->ssid);
2604         }
2605         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2606         if (params->ie)
2607                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2608         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2609                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2610         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2611                 type = NL80211_AUTHTYPE_SHARED_KEY;
2612         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2613                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2614         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2615                 type = NL80211_AUTHTYPE_FT;
2616         else
2617                 goto nla_put_failure;
2618         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2619         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2620         if (params->local_state_change) {
2621                 wpa_printf(MSG_DEBUG, "  * Local state change only");
2622                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2623         }
2624
2625         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2626         msg = NULL;
2627         if (ret) {
2628                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2629                            "(%s)", ret, strerror(-ret));
2630                 count++;
2631                 if (ret == -EALREADY && count == 1 && params->bssid &&
2632                     !params->local_state_change) {
2633                         /*
2634                          * mac80211 does not currently accept new
2635                          * authentication if we are already authenticated. As a
2636                          * workaround, force deauthentication and try again.
2637                          */
2638                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2639                                    "after forced deauthentication");
2640                         wpa_driver_nl80211_deauthenticate(
2641                                 bss, params->bssid,
2642                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2643                         nlmsg_free(msg);
2644                         goto retry;
2645                 }
2646                 goto nla_put_failure;
2647         }
2648         ret = 0;
2649         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2650                    "successfully");
2651
2652 nla_put_failure:
2653         nlmsg_free(msg);
2654         return ret;
2655 }
2656
2657
2658 struct phy_info_arg {
2659         u16 *num_modes;
2660         struct hostapd_hw_modes *modes;
2661 };
2662
2663 static int phy_info_handler(struct nl_msg *msg, void *arg)
2664 {
2665         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2666         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2667         struct phy_info_arg *phy_info = arg;
2668
2669         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2670
2671         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2672         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2673                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2674                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2675                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2676                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2677                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2678                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2679         };
2680
2681         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2682         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2683                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2684                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2685         };
2686
2687         struct nlattr *nl_band;
2688         struct nlattr *nl_freq;
2689         struct nlattr *nl_rate;
2690         int rem_band, rem_freq, rem_rate;
2691         struct hostapd_hw_modes *mode;
2692         int idx, mode_is_set;
2693
2694         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2695                   genlmsg_attrlen(gnlh, 0), NULL);
2696
2697         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2698                 return NL_SKIP;
2699
2700         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2701                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2702                 if (!mode)
2703                         return NL_SKIP;
2704                 phy_info->modes = mode;
2705
2706                 mode_is_set = 0;
2707
2708                 mode = &phy_info->modes[*(phy_info->num_modes)];
2709                 memset(mode, 0, sizeof(*mode));
2710                 *(phy_info->num_modes) += 1;
2711
2712                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2713                           nla_len(nl_band), NULL);
2714
2715                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2716                         mode->ht_capab = nla_get_u16(
2717                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2718                 }
2719
2720                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2721                         mode->a_mpdu_params |= nla_get_u8(
2722                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2723                                 0x03;
2724                 }
2725
2726                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2727                         mode->a_mpdu_params |= nla_get_u8(
2728                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2729                                 2;
2730                 }
2731
2732                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2733                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2734                         u8 *mcs;
2735                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2736                         os_memcpy(mode->mcs_set, mcs, 16);
2737                 }
2738
2739                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2740                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2741                                   nla_len(nl_freq), freq_policy);
2742                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2743                                 continue;
2744                         mode->num_channels++;
2745                 }
2746
2747                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2748                 if (!mode->channels)
2749                         return NL_SKIP;
2750
2751                 idx = 0;
2752
2753                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2754                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2755                                   nla_len(nl_freq), freq_policy);
2756                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2757                                 continue;
2758
2759                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2760                         mode->channels[idx].flag = 0;
2761
2762                         if (!mode_is_set) {
2763                                 /* crude heuristic */
2764                                 if (mode->channels[idx].freq < 4000)
2765                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2766                                 else
2767                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2768                                 mode_is_set = 1;
2769                         }
2770
2771                         /* crude heuristic */
2772                         if (mode->channels[idx].freq < 4000)
2773                                 if (mode->channels[idx].freq == 2484)
2774                                         mode->channels[idx].chan = 14;
2775                                 else
2776                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2777                         else
2778                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2779
2780                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2781                                 mode->channels[idx].flag |=
2782                                         HOSTAPD_CHAN_DISABLED;
2783                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2784                                 mode->channels[idx].flag |=
2785                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2786                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2787                                 mode->channels[idx].flag |=
2788                                         HOSTAPD_CHAN_NO_IBSS;
2789                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2790                                 mode->channels[idx].flag |=
2791                                         HOSTAPD_CHAN_RADAR;
2792
2793                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2794                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2795                                 mode->channels[idx].max_tx_power =
2796                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2797
2798                         idx++;
2799                 }
2800
2801                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2802                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2803                                   nla_len(nl_rate), rate_policy);
2804                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2805                                 continue;
2806                         mode->num_rates++;
2807                 }
2808
2809                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2810                 if (!mode->rates)
2811                         return NL_SKIP;
2812
2813                 idx = 0;
2814
2815                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2816                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2817                                   nla_len(nl_rate), rate_policy);
2818                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2819                                 continue;
2820                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2821
2822                         /* crude heuristic */
2823                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2824                             mode->rates[idx] > 200)
2825                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2826
2827                         idx++;
2828                 }
2829         }
2830
2831         return NL_SKIP;
2832 }
2833
2834 static struct hostapd_hw_modes *
2835 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2836 {
2837         u16 m;
2838         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2839         int i, mode11g_idx = -1;
2840
2841         /* If only 802.11g mode is included, use it to construct matching
2842          * 802.11b mode data. */
2843
2844         for (m = 0; m < *num_modes; m++) {
2845                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2846                         return modes; /* 802.11b already included */
2847                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2848                         mode11g_idx = m;
2849         }
2850
2851         if (mode11g_idx < 0)
2852                 return modes; /* 2.4 GHz band not supported at all */
2853
2854         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2855         if (nmodes == NULL)
2856                 return modes; /* Could not add 802.11b mode */
2857
2858         mode = &nmodes[*num_modes];
2859         os_memset(mode, 0, sizeof(*mode));
2860         (*num_modes)++;
2861         modes = nmodes;
2862
2863         mode->mode = HOSTAPD_MODE_IEEE80211B;
2864
2865         mode11g = &modes[mode11g_idx];
2866         mode->num_channels = mode11g->num_channels;
2867         mode->channels = os_malloc(mode11g->num_channels *
2868                                    sizeof(struct hostapd_channel_data));
2869         if (mode->channels == NULL) {
2870                 (*num_modes)--;
2871                 return modes; /* Could not add 802.11b mode */
2872         }
2873         os_memcpy(mode->channels, mode11g->channels,
2874                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2875
2876         mode->num_rates = 0;
2877         mode->rates = os_malloc(4 * sizeof(int));
2878         if (mode->rates == NULL) {
2879                 os_free(mode->channels);
2880                 (*num_modes)--;
2881                 return modes; /* Could not add 802.11b mode */
2882         }
2883
2884         for (i = 0; i < mode11g->num_rates; i++) {
2885                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2886                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2887                         continue;
2888                 mode->rates[mode->num_rates] = mode11g->rates[i];
2889                 mode->num_rates++;
2890                 if (mode->num_rates == 4)
2891                         break;
2892         }
2893
2894         if (mode->num_rates == 0) {
2895                 os_free(mode->channels);
2896                 os_free(mode->rates);
2897                 (*num_modes)--;
2898                 return modes; /* No 802.11b rates */
2899         }
2900
2901         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2902                    "information");
2903
2904         return modes;
2905 }
2906
2907
2908 static struct hostapd_hw_modes *
2909 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2910 {
2911         struct i802_bss *bss = priv;
2912         struct wpa_driver_nl80211_data *drv = bss->drv;
2913         struct nl_msg *msg;
2914         struct phy_info_arg result = {
2915                 .num_modes = num_modes,
2916                 .modes = NULL,
2917         };
2918
2919         *num_modes = 0;
2920         *flags = 0;
2921
2922         msg = nlmsg_alloc();
2923         if (!msg)
2924                 return NULL;
2925
2926         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2927                     0, NL80211_CMD_GET_WIPHY, 0);
2928
2929         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2930
2931         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2932                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2933  nla_put_failure:
2934         return NULL;
2935 }
2936
2937
2938 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2939                                          const void *data, size_t len,
2940                                          int encrypt)
2941 {
2942         __u8 rtap_hdr[] = {
2943                 0x00, 0x00, /* radiotap version */
2944                 0x0e, 0x00, /* radiotap length */
2945                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2946                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2947                 0x00,       /* padding */
2948                 0x00, 0x00, /* RX and TX flags to indicate that */
2949                 0x00, 0x00, /* this is the injected frame directly */
2950         };
2951         struct iovec iov[2] = {
2952                 {
2953                         .iov_base = &rtap_hdr,
2954                         .iov_len = sizeof(rtap_hdr),
2955                 },
2956                 {
2957                         .iov_base = (void *) data,
2958                         .iov_len = len,
2959                 }
2960         };
2961         struct msghdr msg = {
2962                 .msg_name = NULL,
2963                 .msg_namelen = 0,
2964                 .msg_iov = iov,
2965                 .msg_iovlen = 2,
2966                 .msg_control = NULL,
2967                 .msg_controllen = 0,
2968                 .msg_flags = 0,
2969         };
2970
2971         if (encrypt)
2972                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2973
2974         return sendmsg(drv->monitor_sock, &msg, 0);
2975 }
2976
2977
2978 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2979                                         size_t data_len)
2980 {
2981         struct i802_bss *bss = priv;
2982         struct wpa_driver_nl80211_data *drv = bss->drv;
2983         struct ieee80211_mgmt *mgmt;
2984         int encrypt = 1;
2985         u16 fc;
2986
2987         mgmt = (struct ieee80211_mgmt *) data;
2988         fc = le_to_host16(mgmt->frame_control);
2989
2990         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2991             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2992                 /*
2993                  * Only one of the authentication frame types is encrypted.
2994                  * In order for static WEP encryption to work properly (i.e.,
2995                  * to not encrypt the frame), we need to tell mac80211 about
2996                  * the frames that must not be encrypted.
2997                  */
2998                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2999                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
3000                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
3001                         encrypt = 0;
3002         }
3003
3004         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
3005 }
3006
3007
3008 static int wpa_driver_nl80211_set_beacon(void *priv,
3009                                          const u8 *head, size_t head_len,
3010                                          const u8 *tail, size_t tail_len,
3011                                          int dtim_period, int beacon_int)
3012 {
3013         struct i802_bss *bss = priv;
3014         struct wpa_driver_nl80211_data *drv = bss->drv;
3015         struct nl_msg *msg;
3016         u8 cmd = NL80211_CMD_NEW_BEACON;
3017         int ret;
3018         int beacon_set;
3019         int ifindex = if_nametoindex(bss->ifname);
3020
3021         beacon_set = bss->beacon_set;
3022
3023         msg = nlmsg_alloc();
3024         if (!msg)
3025                 return -ENOMEM;
3026
3027         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
3028                    beacon_set);
3029         if (beacon_set)
3030                 cmd = NL80211_CMD_SET_BEACON;
3031
3032         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3033                     0, cmd, 0);
3034         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3035         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3036         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3037         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
3038         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3039
3040         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3041         if (ret) {
3042                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
3043                            ret, strerror(-ret));
3044         } else {
3045                 bss->beacon_set = 1;
3046         }
3047         return ret;
3048  nla_put_failure:
3049         return -ENOBUFS;
3050 }
3051
3052
3053 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
3054                                        int freq, int ht_enabled,
3055                                        int sec_channel_offset)
3056 {
3057         struct nl_msg *msg;
3058         int ret;
3059
3060         msg = nlmsg_alloc();
3061         if (!msg)
3062                 return -1;
3063
3064         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3065                     NL80211_CMD_SET_WIPHY, 0);
3066
3067         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3068         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
3069         if (ht_enabled) {
3070                 switch (sec_channel_offset) {
3071                 case -1:
3072                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3073                                     NL80211_CHAN_HT40MINUS);
3074                         break;
3075                 case 1:
3076                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3077                                     NL80211_CHAN_HT40PLUS);
3078                         break;
3079                 default:
3080                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3081                                     NL80211_CHAN_HT20);
3082                         break;
3083                 }
3084         }
3085
3086         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3087         if (ret == 0)
3088                 return 0;
3089         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
3090                    "%d (%s)", freq, ret, strerror(-ret));
3091 nla_put_failure:
3092         return -1;
3093 }
3094
3095
3096 static int wpa_driver_nl80211_sta_add(void *priv,
3097                                       struct hostapd_sta_add_params *params)
3098 {
3099         struct i802_bss *bss = priv;
3100         struct wpa_driver_nl80211_data *drv = bss->drv;
3101         struct nl_msg *msg;
3102         int ret = -ENOBUFS;
3103
3104         msg = nlmsg_alloc();
3105         if (!msg)
3106                 return -ENOMEM;
3107
3108         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3109                     0, NL80211_CMD_NEW_STATION, 0);
3110
3111         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
3112         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3113         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3114         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3115                 params->supp_rates);
3116         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3117                     params->listen_interval);
3118         if (params->ht_capabilities) {
3119                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3120                         sizeof(*params->ht_capabilities),
3121                         params->ht_capabilities);
3122         }
3123
3124         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3125         if (ret)
3126                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3127                            "result: %d (%s)", ret, strerror(-ret));
3128         if (ret == -EEXIST)
3129                 ret = 0;
3130  nla_put_failure:
3131         return ret;
3132 }
3133
3134
3135 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
3136 {
3137         struct i802_bss *bss = priv;
3138         struct wpa_driver_nl80211_data *drv = bss->drv;
3139         struct nl_msg *msg;
3140         int ret;
3141
3142         msg = nlmsg_alloc();
3143         if (!msg)
3144                 return -ENOMEM;
3145
3146         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3147                     0, NL80211_CMD_DEL_STATION, 0);
3148
3149         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3150                     if_nametoindex(bss->ifname));
3151         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3152
3153         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3154         if (ret == -ENOENT)
3155                 return 0;
3156         return ret;
3157  nla_put_failure:
3158         return -ENOBUFS;
3159 }
3160
3161
3162 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
3163                                  int ifidx)
3164 {
3165         struct nl_msg *msg;
3166
3167         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
3168
3169 #ifdef HOSTAPD
3170         /* stop listening for EAPOL on this interface */
3171         del_ifidx(drv, ifidx);
3172 #endif /* HOSTAPD */
3173
3174         msg = nlmsg_alloc();
3175         if (!msg)
3176                 goto nla_put_failure;
3177
3178         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3179                     0, NL80211_CMD_DEL_INTERFACE, 0);
3180         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3181
3182         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3183                 return;
3184  nla_put_failure:
3185         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
3186 }
3187
3188
3189 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
3190                                      const char *ifname,
3191                                      enum nl80211_iftype iftype,
3192                                      const u8 *addr, int wds)
3193 {
3194         struct nl_msg *msg, *flags = NULL;
3195         int ifidx;
3196         int ret = -ENOBUFS;
3197
3198         msg = nlmsg_alloc();
3199         if (!msg)
3200                 return -1;
3201
3202         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3203                     0, NL80211_CMD_NEW_INTERFACE, 0);
3204         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3205         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3206         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3207
3208         if (iftype == NL80211_IFTYPE_MONITOR) {
3209                 int err;
3210
3211                 flags = nlmsg_alloc();
3212                 if (!flags)
3213                         goto nla_put_failure;
3214
3215                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3216
3217                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3218
3219                 nlmsg_free(flags);
3220
3221                 if (err)
3222                         goto nla_put_failure;
3223         } else if (wds) {
3224                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
3225         }
3226
3227         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3228         if (ret) {
3229  nla_put_failure:
3230                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
3231                            ifname, ret, strerror(-ret));
3232                 return ret;
3233         }
3234
3235         ifidx = if_nametoindex(ifname);
3236         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
3237                    ifname, ifidx);
3238
3239         if (ifidx <= 0)
3240                 return -1;
3241
3242 #ifdef HOSTAPD
3243         /* start listening for EAPOL on this interface */
3244         add_ifidx(drv, ifidx);
3245 #endif /* HOSTAPD */
3246
3247         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
3248             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
3249                 nl80211_remove_iface(drv, ifidx);
3250                 return -1;
3251         }
3252
3253         return ifidx;
3254 }
3255
3256
3257 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3258                                 const char *ifname, enum nl80211_iftype iftype,
3259                                 const u8 *addr, int wds)
3260 {
3261         int ret;
3262
3263         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
3264
3265         /* if error occured and interface exists already */
3266         if (ret == -ENFILE && if_nametoindex(ifname)) {
3267                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
3268
3269                 /* Try to remove the interface that was already there. */
3270                 nl80211_remove_iface(drv, if_nametoindex(ifname));
3271
3272                 /* Try to create the interface again */
3273                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
3274                                                 wds);
3275         }
3276
3277         if (ret >= 0 && drv->disable_11b_rates)
3278                 nl80211_disable_11b_rates(drv, ret, 1);
3279
3280         return ret;
3281 }
3282
3283
3284 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
3285 {
3286         struct ieee80211_hdr *hdr;
3287         u16 fc;
3288         union wpa_event_data event;
3289
3290         hdr = (struct ieee80211_hdr *) buf;
3291         fc = le_to_host16(hdr->frame_control);
3292
3293         os_memset(&event, 0, sizeof(event));
3294         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
3295         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
3296         event.tx_status.dst = hdr->addr1;
3297         event.tx_status.data = buf;
3298         event.tx_status.data_len = len;
3299         event.tx_status.ack = ok;
3300         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
3301 }
3302
3303
3304 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
3305                              u8 *buf, size_t len)
3306 {
3307         union wpa_event_data event;
3308         os_memset(&event, 0, sizeof(event));
3309         event.rx_from_unknown.frame = buf;
3310         event.rx_from_unknown.len = len;
3311         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
3312 }
3313
3314
3315 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3316                          u8 *buf, size_t len, int datarate, int ssi_signal)
3317 {
3318         struct ieee80211_hdr *hdr;
3319         u16 fc;
3320         union wpa_event_data event;
3321
3322         hdr = (struct ieee80211_hdr *) buf;
3323         fc = le_to_host16(hdr->frame_control);
3324
3325         switch (WLAN_FC_GET_TYPE(fc)) {
3326         case WLAN_FC_TYPE_MGMT:
3327                 os_memset(&event, 0, sizeof(event));
3328                 event.rx_mgmt.frame = buf;
3329                 event.rx_mgmt.frame_len = len;
3330                 event.rx_mgmt.datarate = datarate;
3331                 event.rx_mgmt.ssi_signal = ssi_signal;
3332                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3333                 break;
3334         case WLAN_FC_TYPE_CTRL:
3335                 /* can only get here with PS-Poll frames */
3336                 wpa_printf(MSG_DEBUG, "CTRL");
3337                 from_unknown_sta(drv, buf, len);
3338                 break;
3339         case WLAN_FC_TYPE_DATA:
3340                 from_unknown_sta(drv, buf, len);
3341                 break;
3342         }
3343 }
3344
3345
3346 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3347 {
3348         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3349         int len;
3350         unsigned char buf[3000];
3351         struct ieee80211_radiotap_iterator iter;
3352         int ret;
3353         int datarate = 0, ssi_signal = 0;
3354         int injected = 0, failed = 0, rxflags = 0;
3355
3356         len = recv(sock, buf, sizeof(buf), 0);
3357         if (len < 0) {
3358                 perror("recv");
3359                 return;
3360         }
3361
3362         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3363                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3364                            "frame since Probe Request reporting is disabled");
3365                 return;
3366         }
3367
3368         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3369                 printf("received invalid radiotap frame\n");
3370                 return;
3371         }
3372
3373         while (1) {
3374                 ret = ieee80211_radiotap_iterator_next(&iter);
3375                 if (ret == -ENOENT)
3376                         break;
3377                 if (ret) {
3378                         printf("received invalid radiotap frame (%d)\n", ret);
3379                         return;
3380                 }
3381                 switch (iter.this_arg_index) {
3382                 case IEEE80211_RADIOTAP_FLAGS:
3383                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3384                                 len -= 4;
3385                         break;
3386                 case IEEE80211_RADIOTAP_RX_FLAGS:
3387                         rxflags = 1;
3388                         break;
3389                 case IEEE80211_RADIOTAP_TX_FLAGS:
3390                         injected = 1;
3391                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3392                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3393                         break;
3394                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3395                         break;
3396                 case IEEE80211_RADIOTAP_CHANNEL:
3397                         /* TODO: convert from freq/flags to channel number */
3398                         break;
3399                 case IEEE80211_RADIOTAP_RATE:
3400                         datarate = *iter.this_arg * 5;
3401                         break;
3402                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3403                         ssi_signal = *iter.this_arg;
3404                         break;
3405                 }
3406         }
3407
3408         if (rxflags && injected)
3409                 return;
3410
3411         if (!injected)
3412                 handle_frame(drv, buf + iter.max_length,
3413                              len - iter.max_length, datarate, ssi_signal);
3414         else
3415                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3416                                    len - iter.max_length, !failed);
3417 }
3418
3419
3420 /*
3421  * we post-process the filter code later and rewrite
3422  * this to the offset to the last instruction
3423  */
3424 #define PASS    0xFF
3425 #define FAIL    0xFE
3426
3427 static struct sock_filter msock_filter_insns[] = {
3428         /*
3429          * do a little-endian load of the radiotap length field
3430          */
3431         /* load lower byte into A */
3432         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3433         /* put it into X (== index register) */
3434         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3435         /* load upper byte into A */
3436         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3437         /* left-shift it by 8 */
3438         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3439         /* or with X */
3440         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3441         /* put result into X */
3442         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3443
3444         /*
3445          * Allow management frames through, this also gives us those
3446          * management frames that we sent ourselves with status
3447          */
3448         /* load the lower byte of the IEEE 802.11 frame control field */
3449         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3450         /* mask off frame type and version */
3451         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3452         /* accept frame if it's both 0, fall through otherwise */
3453         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3454
3455         /*
3456          * TODO: add a bit to radiotap RX flags that indicates
3457          * that the sending station is not associated, then
3458          * add a filter here that filters on our DA and that flag
3459          * to allow us to deauth frames to that bad station.
3460          *
3461          * Not a regression -- we didn't do it before either.
3462          */
3463
3464 #if 0
3465         /*
3466          * drop non-data frames
3467          */
3468         /* load the lower byte of the frame control field */
3469         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3470         /* mask off QoS bit */
3471         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3472         /* drop non-data frames */
3473         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3474 #endif
3475         /* load the upper byte of the frame control field */
3476         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3477         /* mask off toDS/fromDS */
3478         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3479         /* accept WDS frames */
3480         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3481
3482         /*
3483          * add header length to index
3484          */
3485         /* load the lower byte of the frame control field */
3486         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3487         /* mask off QoS bit */
3488         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3489         /* right shift it by 6 to give 0 or 2 */
3490         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3491         /* add data frame header length */
3492         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3493         /* add index, was start of 802.11 header */
3494         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3495         /* move to index, now start of LL header */
3496         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3497
3498         /*
3499          * Accept empty data frames, we use those for
3500          * polling activity.
3501          */
3502         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3503         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3504
3505         /*
3506          * Accept EAPOL frames
3507          */
3508         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3509         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3510         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3511         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3512
3513         /* keep these last two statements or change the code below */
3514         /* return 0 == "DROP" */
3515         BPF_STMT(BPF_RET | BPF_K, 0),
3516         /* return ~0 == "keep all" */
3517         BPF_STMT(BPF_RET | BPF_K, ~0),
3518 };
3519
3520 static struct sock_fprog msock_filter = {
3521         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3522         .filter = msock_filter_insns,
3523 };
3524
3525
3526 static int add_monitor_filter(int s)
3527 {
3528         int idx;
3529
3530         /* rewrite all PASS/FAIL jump offsets */
3531         for (idx = 0; idx < msock_filter.len; idx++) {
3532                 struct sock_filter *insn = &msock_filter_insns[idx];
3533
3534                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3535                         if (insn->code == (BPF_JMP|BPF_JA)) {
3536                                 if (insn->k == PASS)
3537                                         insn->k = msock_filter.len - idx - 2;
3538                                 else if (insn->k == FAIL)
3539                                         insn->k = msock_filter.len - idx - 3;
3540                         }
3541
3542                         if (insn->jt == PASS)
3543                                 insn->jt = msock_filter.len - idx - 2;
3544                         else if (insn->jt == FAIL)
3545                                 insn->jt = msock_filter.len - idx - 3;
3546
3547                         if (insn->jf == PASS)
3548                                 insn->jf = msock_filter.len - idx - 2;
3549                         else if (insn->jf == FAIL)
3550                                 insn->jf = msock_filter.len - idx - 3;
3551                 }
3552         }
3553
3554         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3555                        &msock_filter, sizeof(msock_filter))) {
3556                 perror("SO_ATTACH_FILTER");
3557                 return -1;
3558         }
3559
3560         return 0;
3561 }
3562
3563
3564 static void nl80211_remove_monitor_interface(
3565         struct wpa_driver_nl80211_data *drv)
3566 {
3567         if (drv->monitor_ifidx >= 0) {
3568                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3569                 drv->monitor_ifidx = -1;
3570         }
3571         if (drv->monitor_sock >= 0) {
3572                 eloop_unregister_read_sock(drv->monitor_sock);
3573                 close(drv->monitor_sock);
3574                 drv->monitor_sock = -1;
3575         }
3576 }
3577
3578
3579 static int
3580 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3581 {
3582         char buf[IFNAMSIZ];
3583         struct sockaddr_ll ll;
3584         int optval;
3585         socklen_t optlen;
3586
3587         snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
3588         buf[IFNAMSIZ - 1] = '\0';
3589
3590         drv->monitor_ifidx =
3591                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3592                                      0);
3593
3594         if (drv->monitor_ifidx < 0)
3595                 return -1;
3596
3597         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3598                 goto error;
3599
3600         memset(&ll, 0, sizeof(ll));
3601         ll.sll_family = AF_PACKET;
3602         ll.sll_ifindex = drv->monitor_ifidx;
3603         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3604         if (drv->monitor_sock < 0) {
3605                 perror("socket[PF_PACKET,SOCK_RAW]");
3606                 goto error;
3607         }
3608
3609         if (add_monitor_filter(drv->monitor_sock)) {
3610                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3611                            "interface; do filtering in user space");
3612                 /* This works, but will cost in performance. */
3613         }
3614
3615         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3616                 perror("monitor socket bind");
3617                 goto error;
3618         }
3619
3620         optlen = sizeof(optval);
3621         optval = 20;
3622         if (setsockopt
3623             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3624                 perror("Failed to set socket priority");
3625                 goto error;
3626         }
3627
3628         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3629                                      drv, NULL)) {
3630                 printf("Could not register monitor read socket\n");
3631                 goto error;
3632         }
3633
3634         return 0;
3635  error:
3636         nl80211_remove_monitor_interface(drv);
3637         return -1;
3638 }
3639
3640
3641 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3642
3643 static int wpa_driver_nl80211_hapd_send_eapol(
3644         void *priv, const u8 *addr, const u8 *data,
3645         size_t data_len, int encrypt, const u8 *own_addr)
3646 {
3647         struct i802_bss *bss = priv;
3648         struct wpa_driver_nl80211_data *drv = bss->drv;
3649         struct ieee80211_hdr *hdr;
3650         size_t len;
3651         u8 *pos;
3652         int res;
3653 #if 0 /* FIX */
3654         int qos = sta->flags & WPA_STA_WMM;
3655 #else
3656         int qos = 0;
3657 #endif
3658
3659         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3660                 data_len;
3661         hdr = os_zalloc(len);
3662         if (hdr == NULL) {
3663                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3664                        (unsigned long) len);
3665                 return -1;
3666         }
3667
3668         hdr->frame_control =
3669                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3670         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3671         if (encrypt)
3672                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3673 #if 0 /* To be enabled if qos determination is added above */
3674         if (qos) {
3675                 hdr->frame_control |=
3676                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3677         }
3678 #endif
3679
3680         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3681         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3682         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3683         pos = (u8 *) (hdr + 1);
3684
3685 #if 0 /* To be enabled if qos determination is added above */
3686         if (qos) {
3687                 /* add an empty QoS header if needed */
3688                 pos[0] = 0;
3689                 pos[1] = 0;
3690                 pos += 2;
3691         }
3692 #endif
3693
3694         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3695         pos += sizeof(rfc1042_header);
3696         WPA_PUT_BE16(pos, ETH_P_PAE);
3697         pos += 2;
3698         memcpy(pos, data, data_len);
3699
3700         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3701         if (res < 0) {
3702                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3703                            "failed: %d (%s)",
3704                            (unsigned long) len, errno, strerror(errno));
3705         }
3706         os_free(hdr);
3707
3708         return res;
3709 }
3710
3711
3712 static u32 sta_flags_nl80211(int flags)
3713 {
3714         u32 f = 0;
3715
3716         if (flags & WPA_STA_AUTHORIZED)
3717                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3718         if (flags & WPA_STA_WMM)
3719                 f |= BIT(NL80211_STA_FLAG_WME);
3720         if (flags & WPA_STA_SHORT_PREAMBLE)
3721                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3722         if (flags & WPA_STA_MFP)
3723                 f |= BIT(NL80211_STA_FLAG_MFP);
3724
3725         return f;
3726 }
3727
3728
3729 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3730                                             int total_flags,
3731                                             int flags_or, int flags_and)
3732 {
3733         struct i802_bss *bss = priv;
3734         struct wpa_driver_nl80211_data *drv = bss->drv;
3735         struct nl_msg *msg, *flags = NULL;
3736         struct nl80211_sta_flag_update upd;
3737
3738         msg = nlmsg_alloc();
3739         if (!msg)
3740                 return -ENOMEM;
3741
3742         flags = nlmsg_alloc();
3743         if (!flags) {
3744                 nlmsg_free(msg);
3745                 return -ENOMEM;
3746         }
3747
3748         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3749                     0, NL80211_CMD_SET_STATION, 0);
3750
3751         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3752                     if_nametoindex(bss->ifname));
3753         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3754
3755         /*
3756          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3757          * can be removed eventually.
3758          */
3759         if (total_flags & WPA_STA_AUTHORIZED)
3760                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3761
3762         if (total_flags & WPA_STA_WMM)
3763                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3764
3765         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3766                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3767
3768         if (total_flags & WPA_STA_MFP)
3769                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3770
3771         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3772                 goto nla_put_failure;
3773
3774         os_memset(&upd, 0, sizeof(upd));
3775         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3776         upd.set = sta_flags_nl80211(flags_or);
3777         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3778
3779         nlmsg_free(flags);
3780
3781         return send_and_recv_msgs(drv, msg, NULL, NULL);
3782  nla_put_failure:
3783         nlmsg_free(flags);
3784         return -ENOBUFS;
3785 }
3786
3787
3788 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3789                                  struct wpa_driver_associate_params *params)
3790 {
3791         if (params->p2p)
3792                 wpa_printf(MSG_DEBUG, "nl80211: Setup AP operations for P2P "
3793                            "group (GO)");
3794         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
3795             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3796                 nl80211_remove_monitor_interface(drv);
3797                 return -1;
3798         }
3799
3800         /* TODO: setup monitor interface (and add code somewhere to remove this
3801          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3802
3803         return 0;
3804 }
3805
3806
3807 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3808 {
3809         struct nl_msg *msg;
3810         int ret = -1;
3811
3812         msg = nlmsg_alloc();
3813         if (!msg)
3814                 return -1;
3815
3816         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3817                     NL80211_CMD_LEAVE_IBSS, 0);
3818         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3819         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3820         msg = NULL;
3821         if (ret) {
3822                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3823                            "(%s)", ret, strerror(-ret));
3824                 goto nla_put_failure;
3825         }
3826
3827         ret = 0;
3828         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3829
3830 nla_put_failure:
3831         nlmsg_free(msg);
3832         return ret;
3833 }
3834
3835
3836 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3837                                    struct wpa_driver_associate_params *params)
3838 {
3839         struct nl_msg *msg;
3840         int ret = -1;
3841         int count = 0;
3842
3843         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3844
3845         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
3846                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3847                            "IBSS mode");
3848                 return -1;
3849         }
3850
3851 retry:
3852         msg = nlmsg_alloc();
3853         if (!msg)
3854                 return -1;
3855
3856         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3857                     NL80211_CMD_JOIN_IBSS, 0);
3858         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3859
3860         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3861                 goto nla_put_failure;
3862
3863         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3864                           params->ssid, params->ssid_len);
3865         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3866                 params->ssid);
3867         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3868         drv->ssid_len = params->ssid_len;
3869
3870         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3871         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3872
3873         ret = nl80211_set_conn_keys(params, msg);
3874         if (ret)
3875                 goto nla_put_failure;
3876
3877         if (params->wpa_ie) {
3878                 wpa_hexdump(MSG_DEBUG,
3879                             "  * Extra IEs for Beacon/Probe Response frames",
3880                             params->wpa_ie, params->wpa_ie_len);
3881                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3882                         params->wpa_ie);
3883         }
3884
3885         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3886         msg = NULL;
3887         if (ret) {
3888                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3889                            ret, strerror(-ret));
3890                 count++;
3891                 if (ret == -EALREADY && count == 1) {
3892                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3893                                    "forced leave");
3894                         nl80211_leave_ibss(drv);
3895                         nlmsg_free(msg);
3896                         goto retry;
3897                 }
3898
3899                 goto nla_put_failure;
3900         }
3901         ret = 0;
3902         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3903
3904 nla_put_failure:
3905         nlmsg_free(msg);
3906         return ret;
3907 }
3908
3909
3910 static int wpa_driver_nl80211_connect(
3911         struct wpa_driver_nl80211_data *drv,
3912         struct wpa_driver_associate_params *params)
3913 {
3914         struct nl_msg *msg;
3915         enum nl80211_auth_type type;
3916         int ret = 0;
3917
3918         msg = nlmsg_alloc();
3919         if (!msg)
3920                 return -1;
3921
3922         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3923         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3924                     NL80211_CMD_CONNECT, 0);
3925
3926         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3927         if (params->bssid) {
3928                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3929                            MAC2STR(params->bssid));
3930                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3931         }
3932         if (params->freq) {
3933                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3934                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3935         }
3936         if (params->ssid) {
3937                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3938                                   params->ssid, params->ssid_len);
3939                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3940                         params->ssid);
3941                 if (params->ssid_len > sizeof(drv->ssid))
3942                         goto nla_put_failure;
3943                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3944                 drv->ssid_len = params->ssid_len;
3945         }
3946         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3947         if (params->wpa_ie)
3948                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3949                         params->wpa_ie);
3950
3951         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3952                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3953         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3954                 type = NL80211_AUTHTYPE_SHARED_KEY;
3955         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3956                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3957         else if (params->auth_alg & WPA_AUTH_ALG_FT)
3958                 type = NL80211_AUTHTYPE_FT;
3959         else
3960                 goto nla_put_failure;
3961
3962         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3963         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3964
3965         if (params->wpa_ie && params->wpa_ie_len) {
3966                 enum nl80211_wpa_versions ver;
3967
3968                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3969                         ver = NL80211_WPA_VERSION_2;
3970                 else
3971                         ver = NL80211_WPA_VERSION_1;
3972
3973                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3974                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3975         }
3976
3977         if (params->pairwise_suite != CIPHER_NONE) {
3978                 int cipher;
3979
3980                 switch (params->pairwise_suite) {
3981                 case CIPHER_WEP40:
3982                         cipher = WLAN_CIPHER_SUITE_WEP40;
3983                         break;
3984                 case CIPHER_WEP104:
3985                         cipher = WLAN_CIPHER_SUITE_WEP104;
3986                         break;
3987                 case CIPHER_CCMP:
3988                         cipher = WLAN_CIPHER_SUITE_CCMP;
3989                         break;
3990                 case CIPHER_TKIP:
3991                 default:
3992                         cipher = WLAN_CIPHER_SUITE_TKIP;
3993                         break;
3994                 }
3995                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3996         }
3997
3998         if (params->group_suite != CIPHER_NONE) {
3999                 int cipher;
4000
4001                 switch (params->group_suite) {
4002                 case CIPHER_WEP40:
4003                         cipher = WLAN_CIPHER_SUITE_WEP40;
4004                         break;
4005                 case CIPHER_WEP104:
4006                         cipher = WLAN_CIPHER_SUITE_WEP104;
4007                         break;
4008                 case CIPHER_CCMP:
4009                         cipher = WLAN_CIPHER_SUITE_CCMP;
4010                         break;
4011                 case CIPHER_TKIP:
4012                 default:
4013                         cipher = WLAN_CIPHER_SUITE_TKIP;
4014                         break;
4015                 }
4016                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
4017         }
4018
4019         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
4020             params->key_mgmt_suite == KEY_MGMT_PSK) {
4021                 int mgmt = WLAN_AKM_SUITE_PSK;
4022
4023                 switch (params->key_mgmt_suite) {
4024                 case KEY_MGMT_802_1X:
4025                         mgmt = WLAN_AKM_SUITE_8021X;
4026                         break;
4027                 case KEY_MGMT_PSK:
4028                 default:
4029                         mgmt = WLAN_AKM_SUITE_PSK;
4030                         break;
4031                 }
4032                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
4033         }
4034
4035         ret = nl80211_set_conn_keys(params, msg);
4036         if (ret)
4037                 goto nla_put_failure;
4038
4039         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4040         msg = NULL;
4041         if (ret) {
4042                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
4043                            "(%s)", ret, strerror(-ret));
4044                 goto nla_put_failure;
4045         }
4046         ret = 0;
4047         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
4048
4049 nla_put_failure:
4050         nlmsg_free(msg);
4051         return ret;
4052
4053 }
4054
4055
4056 static int wpa_driver_nl80211_associate(
4057         void *priv, struct wpa_driver_associate_params *params)
4058 {
4059         struct i802_bss *bss = priv;
4060         struct wpa_driver_nl80211_data *drv = bss->drv;
4061         int ret = -1;
4062         struct nl_msg *msg;
4063
4064         if (params->mode == IEEE80211_MODE_AP)
4065                 return wpa_driver_nl80211_ap(drv, params);
4066
4067         if (params->mode == IEEE80211_MODE_IBSS)
4068                 return wpa_driver_nl80211_ibss(drv, params);
4069
4070         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
4071                 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
4072                         return -1;
4073                 return wpa_driver_nl80211_connect(drv, params);
4074         }
4075
4076         drv->associated = 0;
4077
4078         msg = nlmsg_alloc();
4079         if (!msg)
4080                 return -1;
4081
4082         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
4083                    drv->ifindex);
4084         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4085                     NL80211_CMD_ASSOCIATE, 0);
4086
4087         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4088         if (params->bssid) {
4089                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
4090                            MAC2STR(params->bssid));
4091                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
4092         }
4093         if (params->freq) {
4094                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
4095                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
4096                 drv->assoc_freq = params->freq;
4097         } else
4098                 drv->assoc_freq = 0;
4099         if (params->ssid) {
4100                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
4101                                   params->ssid, params->ssid_len);
4102                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
4103                         params->ssid);
4104                 if (params->ssid_len > sizeof(drv->ssid))
4105                         goto nla_put_failure;
4106                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
4107                 drv->ssid_len = params->ssid_len;
4108         }
4109         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
4110         if (params->wpa_ie)
4111                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
4112                         params->wpa_ie);
4113
4114 #ifdef CONFIG_IEEE80211W
4115         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
4116                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
4117 #endif /* CONFIG_IEEE80211W */
4118
4119         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
4120
4121         if (params->prev_bssid) {
4122                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
4123                            MAC2STR(params->prev_bssid));
4124                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
4125                         params->prev_bssid);
4126         }
4127
4128         if (params->p2p)
4129                 wpa_printf(MSG_DEBUG, "  * P2P group");
4130
4131         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4132         msg = NULL;
4133         if (ret) {
4134                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
4135                            "(%s)", ret, strerror(-ret));
4136                 nl80211_dump_scan(drv);
4137                 goto nla_put_failure;
4138         }
4139         ret = 0;
4140         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
4141                    "successfully");
4142
4143 nla_put_failure:
4144         nlmsg_free(msg);
4145         return ret;
4146 }
4147
4148
4149 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
4150                             int ifindex, int mode)
4151 {
4152         struct nl_msg *msg;
4153         int ret = -ENOBUFS;
4154
4155         msg = nlmsg_alloc();
4156         if (!msg)
4157                 return -ENOMEM;
4158
4159         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4160                     0, NL80211_CMD_SET_INTERFACE, 0);
4161         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4162         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
4163
4164         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4165         if (!ret)
4166                 return 0;
4167 nla_put_failure:
4168         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
4169                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
4170         return ret;
4171 }
4172
4173
4174 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
4175 {
4176         struct i802_bss *bss = priv;
4177         struct wpa_driver_nl80211_data *drv = bss->drv;
4178         int ret = -1;
4179         int nlmode;
4180         int i;
4181
4182         switch (mode) {
4183         case 0:
4184                 nlmode = NL80211_IFTYPE_STATION;
4185                 break;
4186         case 1:
4187                 nlmode = NL80211_IFTYPE_ADHOC;
4188                 break;
4189         case 2:
4190                 nlmode = NL80211_IFTYPE_AP;
4191                 break;
4192         default:
4193                 return -1;
4194         }
4195
4196         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
4197                 drv->nlmode = nlmode;
4198                 ret = 0;
4199                 goto done;
4200         }
4201
4202         if (nlmode == drv->nlmode) {
4203                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
4204                            "requested mode - ignore error");
4205                 ret = 0;
4206                 goto done; /* Already in the requested mode */
4207         }
4208
4209         /* mac80211 doesn't allow mode changes while the device is up, so
4210          * take the device down, try to set the mode again, and bring the
4211          * device back up.
4212          */
4213         wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
4214                    "interface down");
4215         for (i = 0; i < 10; i++) {
4216                 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) ==
4217                     0) {
4218                         /* Try to set the mode again while the interface is
4219                          * down */
4220                         ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
4221                         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname,
4222                                                   1))
4223                                 ret = -1;
4224                         if (!ret)
4225                                 break;
4226                 } else
4227                         wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
4228                                    "interface down");
4229                 os_sleep(0, 100000);
4230         }
4231
4232         if (!ret) {
4233                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
4234                            "interface is down");
4235                 drv->nlmode = nlmode;
4236         }
4237
4238 done:
4239         if (!ret && nlmode == NL80211_IFTYPE_AP) {
4240                 /* Setup additional AP mode functionality if needed */
4241                 if (drv->monitor_ifidx < 0 &&
4242                     nl80211_create_monitor_interface(drv))
4243                         return -1;
4244         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
4245                 /* Remove additional AP mode functionality */
4246                 nl80211_remove_monitor_interface(drv);
4247                 bss->beacon_set = 0;
4248         }
4249
4250         if (ret)
4251                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
4252                            "from %d failed", nlmode, drv->nlmode);
4253
4254         return ret;
4255 }
4256
4257
4258 static int wpa_driver_nl80211_get_capa(void *priv,
4259                                        struct wpa_driver_capa *capa)
4260 {
4261         struct i802_bss *bss = priv;
4262         struct wpa_driver_nl80211_data *drv = bss->drv;
4263         if (!drv->has_capability)
4264                 return -1;
4265         os_memcpy(capa, &drv->capa, sizeof(*capa));
4266         return 0;
4267 }
4268
4269
4270 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
4271 {
4272         struct i802_bss *bss = priv;
4273         struct wpa_driver_nl80211_data *drv = bss->drv;
4274
4275         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
4276                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
4277         drv->operstate = state;
4278         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
4279                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
4280 }
4281
4282
4283 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
4284 {
4285         struct i802_bss *bss = priv;
4286         struct wpa_driver_nl80211_data *drv = bss->drv;
4287         struct nl_msg *msg;
4288         struct nl80211_sta_flag_update upd;
4289
4290         msg = nlmsg_alloc();
4291         if (!msg)
4292                 return -ENOMEM;
4293
4294         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4295                     0, NL80211_CMD_SET_STATION, 0);
4296
4297         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4298                     if_nametoindex(bss->ifname));
4299         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
4300
4301         os_memset(&upd, 0, sizeof(upd));
4302         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
4303         if (authorized)
4304                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
4305         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4306
4307         return send_and_recv_msgs(drv, msg, NULL, NULL);
4308  nla_put_failure:
4309         return -ENOBUFS;
4310 }
4311
4312
4313 #ifdef HOSTAPD
4314
4315 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4316 {
4317         int i;
4318         int *old;
4319
4320         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
4321                    ifidx);
4322         for (i = 0; i < drv->num_if_indices; i++) {
4323                 if (drv->if_indices[i] == 0) {
4324                         drv->if_indices[i] = ifidx;
4325                         return;
4326                 }
4327         }
4328
4329         if (drv->if_indices != drv->default_if_indices)
4330                 old = drv->if_indices;
4331         else
4332                 old = NULL;
4333
4334         drv->if_indices = os_realloc(old,
4335                                      sizeof(int) * (drv->num_if_indices + 1));
4336         if (!drv->if_indices) {
4337                 if (!old)
4338                         drv->if_indices = drv->default_if_indices;
4339                 else
4340                         drv->if_indices = old;
4341                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4342                            "interfaces");
4343                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4344                 return;
4345         } else if (!old)
4346                 os_memcpy(drv->if_indices, drv->default_if_indices,
4347                           sizeof(drv->default_if_indices));
4348         drv->if_indices[drv->num_if_indices] = ifidx;
4349         drv->num_if_indices++;
4350 }
4351
4352
4353 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4354 {
4355         int i;
4356
4357         for (i = 0; i < drv->num_if_indices; i++) {
4358                 if (drv->if_indices[i] == ifidx) {
4359                         drv->if_indices[i] = 0;
4360                         break;
4361                 }
4362         }
4363 }
4364
4365
4366 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4367 {
4368         int i;
4369
4370         for (i = 0; i < drv->num_if_indices; i++)
4371                 if (drv->if_indices[i] == ifidx)
4372                         return 1;
4373
4374         return 0;
4375 }
4376
4377
4378 static inline int min_int(int a, int b)
4379 {
4380         if (a < b)
4381                 return a;
4382         return b;
4383 }
4384
4385
4386 static int get_key_handler(struct nl_msg *msg, void *arg)
4387 {
4388         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4389         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4390
4391         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4392                   genlmsg_attrlen(gnlh, 0), NULL);
4393
4394         /*
4395          * TODO: validate the key index and mac address!
4396          * Otherwise, there's a race condition as soon as
4397          * the kernel starts sending key notifications.
4398          */
4399
4400         if (tb[NL80211_ATTR_KEY_SEQ])
4401                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4402                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4403         return NL_SKIP;
4404 }
4405
4406
4407 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4408                            int idx, u8 *seq)
4409 {
4410         struct i802_bss *bss = priv;
4411         struct wpa_driver_nl80211_data *drv = bss->drv;
4412         struct nl_msg *msg;
4413
4414         msg = nlmsg_alloc();
4415         if (!msg)
4416                 return -ENOMEM;
4417
4418         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4419                     0, NL80211_CMD_GET_KEY, 0);
4420
4421         if (addr)
4422                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4423         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4424         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4425
4426         memset(seq, 0, 6);
4427
4428         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4429  nla_put_failure:
4430         return -ENOBUFS;
4431 }
4432
4433
4434 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4435                               int mode)
4436 {
4437         struct i802_bss *bss = priv;
4438         struct wpa_driver_nl80211_data *drv = bss->drv;
4439         struct nl_msg *msg;
4440         u8 rates[NL80211_MAX_SUPP_RATES];
4441         u8 rates_len = 0;
4442         int i;
4443
4444         msg = nlmsg_alloc();
4445         if (!msg)
4446                 return -ENOMEM;
4447
4448         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4449                     NL80211_CMD_SET_BSS, 0);
4450
4451         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4452                 rates[rates_len++] = basic_rates[i] / 5;
4453
4454         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4455
4456         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4457
4458         return send_and_recv_msgs(drv, msg, NULL, NULL);
4459  nla_put_failure:
4460         return -ENOBUFS;
4461 }
4462
4463 #endif /* HOSTAPD */
4464
4465
4466 /* Set kernel driver on given frequency (MHz) */
4467 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4468 {
4469         struct i802_bss *bss = priv;
4470         struct wpa_driver_nl80211_data *drv = bss->drv;
4471         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4472                                            freq->sec_channel_offset);
4473 }
4474
4475
4476 #ifdef HOSTAPD
4477
4478 static int i802_set_rts(void *priv, int rts)
4479 {
4480         struct i802_bss *bss = priv;
4481         struct wpa_driver_nl80211_data *drv = bss->drv;
4482         struct nl_msg *msg;
4483         int ret = -ENOBUFS;
4484         u32 val;
4485
4486         msg = nlmsg_alloc();
4487         if (!msg)
4488                 return -ENOMEM;
4489
4490         if (rts >= 2347)
4491                 val = (u32) -1;
4492         else
4493                 val = rts;
4494
4495         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4496                     0, NL80211_CMD_SET_WIPHY, 0);
4497         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4498         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4499
4500         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4501         if (!ret)
4502                 return 0;
4503 nla_put_failure:
4504         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4505                    "%d (%s)", rts, ret, strerror(-ret));
4506         return ret;
4507 }
4508
4509
4510 static int i802_set_frag(void *priv, int frag)
4511 {
4512         struct i802_bss *bss = priv;
4513         struct wpa_driver_nl80211_data *drv = bss->drv;
4514         struct nl_msg *msg;
4515         int ret = -ENOBUFS;
4516         u32 val;
4517
4518         msg = nlmsg_alloc();
4519         if (!msg)
4520                 return -ENOMEM;
4521
4522         if (frag >= 2346)
4523                 val = (u32) -1;
4524         else
4525                 val = frag;
4526
4527         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4528                     0, NL80211_CMD_SET_WIPHY, 0);
4529         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4530         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4531
4532         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4533         if (!ret)
4534                 return 0;
4535 nla_put_failure:
4536         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4537                    "%d: %d (%s)", frag, ret, strerror(-ret));
4538         return ret;
4539 }
4540
4541
4542 static int i802_flush(void *priv)
4543 {
4544         struct i802_bss *bss = priv;
4545         struct wpa_driver_nl80211_data *drv = bss->drv;
4546         struct nl_msg *msg;
4547
4548         msg = nlmsg_alloc();
4549         if (!msg)
4550                 return -1;
4551
4552         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4553                     0, NL80211_CMD_DEL_STATION, 0);
4554
4555         /*
4556          * XXX: FIX! this needs to flush all VLANs too
4557          */
4558         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4559                     if_nametoindex(bss->ifname));
4560
4561         return send_and_recv_msgs(drv, msg, NULL, NULL);
4562  nla_put_failure:
4563         return -ENOBUFS;
4564 }
4565
4566
4567 static int get_sta_handler(struct nl_msg *msg, void *arg)
4568 {
4569         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4570         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4571         struct hostap_sta_driver_data *data = arg;
4572         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4573         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4574                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4575                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4576                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4577                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4578                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4579         };
4580
4581         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4582                   genlmsg_attrlen(gnlh, 0), NULL);
4583
4584         /*
4585          * TODO: validate the interface and mac address!
4586          * Otherwise, there's a race condition as soon as
4587          * the kernel starts sending station notifications.
4588          */
4589
4590         if (!tb[NL80211_ATTR_STA_INFO]) {
4591                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4592                 return NL_SKIP;
4593         }
4594         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4595                              tb[NL80211_ATTR_STA_INFO],
4596                              stats_policy)) {
4597                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4598                 return NL_SKIP;
4599         }
4600
4601         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4602                 data->inactive_msec =
4603                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4604         if (stats[NL80211_STA_INFO_RX_BYTES])
4605                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4606         if (stats[NL80211_STA_INFO_TX_BYTES])
4607                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4608         if (stats[NL80211_STA_INFO_RX_PACKETS])
4609                 data->rx_packets =
4610                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4611         if (stats[NL80211_STA_INFO_TX_PACKETS])
4612                 data->tx_packets =
4613                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4614
4615         return NL_SKIP;
4616 }
4617
4618 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4619                               const u8 *addr)
4620 {
4621         struct i802_bss *bss = priv;
4622         struct wpa_driver_nl80211_data *drv = bss->drv;
4623         struct nl_msg *msg;
4624
4625         os_memset(data, 0, sizeof(*data));
4626         msg = nlmsg_alloc();
4627         if (!msg)
4628                 return -ENOMEM;
4629
4630         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4631                     0, NL80211_CMD_GET_STATION, 0);
4632
4633         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4634         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4635
4636         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4637  nla_put_failure:
4638         return -ENOBUFS;
4639 }
4640
4641
4642 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4643                                     int cw_min, int cw_max, int burst_time)
4644 {
4645         struct i802_bss *bss = priv;
4646         struct wpa_driver_nl80211_data *drv = bss->drv;
4647         struct nl_msg *msg;
4648         struct nlattr *txq, *params;
4649
4650         msg = nlmsg_alloc();
4651         if (!msg)
4652                 return -1;
4653
4654         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4655                     0, NL80211_CMD_SET_WIPHY, 0);
4656
4657         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4658
4659         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4660         if (!txq)
4661                 goto nla_put_failure;
4662
4663         /* We are only sending parameters for a single TXQ at a time */
4664         params = nla_nest_start(msg, 1);
4665         if (!params)
4666                 goto nla_put_failure;
4667
4668         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4669         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4670          * 32 usec, so need to convert the value here. */
4671         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4672         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4673         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4674         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4675
4676         nla_nest_end(msg, params);
4677
4678         nla_nest_end(msg, txq);
4679
4680         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4681                 return 0;
4682  nla_put_failure:
4683         return -1;
4684 }
4685
4686
4687 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4688 {
4689         struct i802_bss *bss = priv;
4690         struct wpa_driver_nl80211_data *drv = bss->drv;
4691         struct nl_msg *msg;
4692
4693         msg = nlmsg_alloc();
4694         if (!msg)
4695                 return -ENOMEM;
4696
4697         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4698                     NL80211_CMD_SET_BSS, 0);
4699
4700         if (cts >= 0)
4701                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4702         if (preamble >= 0)
4703                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4704         if (slot >= 0)
4705                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4706
4707         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4708
4709         return send_and_recv_msgs(drv, msg, NULL, NULL);
4710  nla_put_failure:
4711         return -ENOBUFS;
4712 }
4713
4714
4715 static int i802_set_cts_protect(void *priv, int value)
4716 {
4717         return i802_set_bss(priv, value, -1, -1);
4718 }
4719
4720
4721 static int i802_set_preamble(void *priv, int value)
4722 {
4723         return i802_set_bss(priv, -1, value, -1);
4724 }
4725
4726
4727 static int i802_set_short_slot_time(void *priv, int value)
4728 {
4729         return i802_set_bss(priv, -1, -1, value);
4730 }
4731
4732
4733 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4734                              const char *ifname, int vlan_id)
4735 {
4736         struct i802_bss *bss = priv;
4737         struct wpa_driver_nl80211_data *drv = bss->drv;
4738         struct nl_msg *msg;
4739         int ret = -ENOBUFS;
4740
4741         msg = nlmsg_alloc();
4742         if (!msg)
4743                 return -ENOMEM;
4744
4745         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4746                     0, NL80211_CMD_SET_STATION, 0);
4747
4748         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4749                     if_nametoindex(bss->ifname));
4750         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4751         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4752                     if_nametoindex(ifname));
4753
4754         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4755         if (ret < 0) {
4756                 wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
4757                            MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
4758                            MAC2STR(addr), ifname, vlan_id, ret,
4759                            strerror(-ret));
4760         }
4761  nla_put_failure:
4762         return ret;
4763 }
4764
4765
4766 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4767 {
4768         struct i802_bss *bss = priv;
4769         struct wpa_driver_nl80211_data *drv = bss->drv;
4770         char name[IFNAMSIZ + 1];
4771
4772         os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
4773         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4774                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4775         if (val) {
4776                 if (nl80211_create_iface(drv, name, NL80211_IFTYPE_AP_VLAN,
4777                                          NULL, 1) < 0)
4778                         return -1;
4779                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4780                 return i802_set_sta_vlan(priv, addr, name, 0);
4781         } else {
4782                 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
4783                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4784                                                     name);
4785         }
4786 }
4787
4788
4789 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4790 {
4791         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4792         struct sockaddr_ll lladdr;
4793         unsigned char buf[3000];
4794         int len;
4795         socklen_t fromlen = sizeof(lladdr);
4796
4797         len = recvfrom(sock, buf, sizeof(buf), 0,
4798                        (struct sockaddr *)&lladdr, &fromlen);
4799         if (len < 0) {
4800                 perror("recv");
4801                 return;
4802         }
4803
4804         if (have_ifidx(drv, lladdr.sll_ifindex))
4805                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4806 }
4807
4808
4809 static int i802_get_inact_sec(void *priv, const u8 *addr)
4810 {
4811         struct hostap_sta_driver_data data;
4812         int ret;
4813
4814         data.inactive_msec = (unsigned long) -1;
4815         ret = i802_read_sta_data(priv, &data, addr);
4816         if (ret || data.inactive_msec == (unsigned long) -1)
4817                 return -1;
4818         return data.inactive_msec / 1000;
4819 }
4820
4821
4822 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4823 {
4824 #if 0
4825         /* TODO */
4826 #endif
4827         return 0;
4828 }
4829
4830
4831 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4832                            int reason)
4833 {
4834         struct i802_bss *bss = priv;
4835         struct ieee80211_mgmt mgmt;
4836
4837         memset(&mgmt, 0, sizeof(mgmt));
4838         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4839                                           WLAN_FC_STYPE_DEAUTH);
4840         memcpy(mgmt.da, addr, ETH_ALEN);
4841         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4842         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4843         mgmt.u.deauth.reason_code = host_to_le16(reason);
4844         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4845                                             IEEE80211_HDRLEN +
4846                                             sizeof(mgmt.u.deauth));
4847 }
4848
4849
4850 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4851                              int reason)
4852 {
4853         struct i802_bss *bss = priv;
4854         struct ieee80211_mgmt mgmt;
4855
4856         memset(&mgmt, 0, sizeof(mgmt));
4857         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4858                                           WLAN_FC_STYPE_DISASSOC);
4859         memcpy(mgmt.da, addr, ETH_ALEN);
4860         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4861         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4862         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4863         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4864                                             IEEE80211_HDRLEN +
4865                                             sizeof(mgmt.u.disassoc));
4866 }
4867
4868
4869 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4870                              const char *brname, const char *ifname)
4871 {
4872         int ifindex;
4873         char in_br[IFNAMSIZ];
4874
4875         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4876         ifindex = if_nametoindex(brname);
4877         if (ifindex == 0) {
4878                 /*
4879                  * Bridge was configured, but the bridge device does
4880                  * not exist. Try to add it now.
4881                  */
4882                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4883                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4884                                    "bridge interface %s: %s",
4885                                    brname, strerror(errno));
4886                         return -1;
4887                 }
4888                 drv->added_bridge = 1;
4889                 add_ifidx(drv, if_nametoindex(brname));
4890         }
4891
4892         if (linux_br_get(in_br, ifname) == 0) {
4893                 if (os_strcmp(in_br, brname) == 0)
4894                         return 0; /* already in the bridge */
4895
4896                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4897                            "bridge %s", ifname, in_br);
4898                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4899                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4900                                    "remove interface %s from bridge "
4901                                    "%s: %s",
4902                                    ifname, brname, strerror(errno));
4903                         return -1;
4904                 }
4905         }
4906
4907         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4908                    ifname, brname);
4909         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4910                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4911                            "into bridge %s: %s",
4912                            ifname, brname, strerror(errno));
4913                 return -1;
4914         }
4915         drv->added_if_into_bridge = 1;
4916
4917         return 0;
4918 }
4919
4920
4921 static void *i802_init(struct hostapd_data *hapd,
4922                        struct wpa_init_params *params)
4923 {
4924         struct wpa_driver_nl80211_data *drv;
4925         struct i802_bss *bss;
4926         size_t i;
4927         char brname[IFNAMSIZ];
4928         int ifindex, br_ifindex;
4929         int br_added = 0;
4930
4931         bss = wpa_driver_nl80211_init(hapd, params->ifname);
4932         if (bss == NULL)
4933                 return NULL;
4934
4935         drv = bss->drv;
4936         if (linux_br_get(brname, params->ifname) == 0) {
4937                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4938                            params->ifname, brname);
4939                 br_ifindex = if_nametoindex(brname);
4940         } else {
4941                 brname[0] = '\0';
4942                 br_ifindex = 0;
4943         }
4944
4945         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4946         drv->if_indices = drv->default_if_indices;
4947         for (i = 0; i < params->num_bridge; i++) {
4948                 if (params->bridge[i]) {
4949                         ifindex = if_nametoindex(params->bridge[i]);
4950                         if (ifindex)
4951                                 add_ifidx(drv, ifindex);
4952                         if (ifindex == br_ifindex)
4953                                 br_added = 1;
4954                 }
4955         }
4956         if (!br_added && br_ifindex &&
4957             (params->num_bridge == 0 || !params->bridge[0]))
4958                 add_ifidx(drv, br_ifindex);
4959
4960         /* start listening for EAPOL on the default AP interface */
4961         add_ifidx(drv, drv->ifindex);
4962
4963         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
4964                 goto failed;
4965
4966         if (params->bssid) {
4967                 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
4968                                        params->bssid))
4969                         goto failed;
4970         }
4971
4972         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
4973                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4974                            "into AP mode", bss->ifname);
4975                 goto failed;
4976         }
4977
4978         if (params->num_bridge && params->bridge[0] &&
4979             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
4980                 goto failed;
4981
4982         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
4983                 goto failed;
4984
4985         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4986         if (drv->eapol_sock < 0) {
4987                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4988                 goto failed;
4989         }
4990
4991         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4992         {
4993                 printf("Could not register read socket for eapol\n");
4994                 goto failed;
4995         }
4996
4997         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
4998                 goto failed;
4999
5000         return bss;
5001
5002 failed:
5003         nl80211_remove_monitor_interface(drv);
5004         if (drv->ioctl_sock >= 0)
5005                 close(drv->ioctl_sock);
5006
5007         genl_family_put(drv->nl80211);
5008         nl_cache_free(drv->nl_cache);
5009         nl_handle_destroy(drv->nl_handle);
5010         nl_cb_put(drv->nl_cb);
5011
5012         os_free(drv);
5013         return NULL;
5014 }
5015
5016
5017 static void i802_deinit(void *priv)
5018 {
5019         wpa_driver_nl80211_deinit(priv);
5020 }
5021
5022 #endif /* HOSTAPD */
5023
5024
5025 static enum nl80211_iftype wpa_driver_nl80211_if_type(
5026         enum wpa_driver_if_type type)
5027 {
5028         switch (type) {
5029         case WPA_IF_STATION:
5030         case WPA_IF_P2P_CLIENT:
5031         case WPA_IF_P2P_GROUP:
5032                 return NL80211_IFTYPE_STATION;
5033         case WPA_IF_AP_VLAN:
5034                 return NL80211_IFTYPE_AP_VLAN;
5035         case WPA_IF_AP_BSS:
5036         case WPA_IF_P2P_GO:
5037                 return NL80211_IFTYPE_AP;
5038         }
5039         return -1;
5040 }
5041
5042
5043 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
5044                                      const char *ifname, const u8 *addr,
5045                                      void *bss_ctx, void **drv_priv,
5046                                      char *force_ifname, u8 *if_addr)
5047 {
5048         struct i802_bss *bss = priv;
5049         struct wpa_driver_nl80211_data *drv = bss->drv;
5050         int ifidx;
5051 #ifdef HOSTAPD
5052         struct i802_bss *new_bss = NULL;
5053
5054         if (type == WPA_IF_AP_BSS) {
5055                 new_bss = os_zalloc(sizeof(*new_bss));
5056                 if (new_bss == NULL)
5057                         return -1;
5058         }
5059 #endif /* HOSTAPD */
5060
5061         if (addr)
5062                 os_memcpy(if_addr, addr, ETH_ALEN);
5063         ifidx = nl80211_create_iface(drv, ifname,
5064                                      wpa_driver_nl80211_if_type(type), addr,
5065                                      0);
5066         if (ifidx < 0) {
5067 #ifdef HOSTAPD
5068                 os_free(new_bss);
5069 #endif /* HOSTAPD */
5070                 return -1;
5071         }
5072
5073         if (!addr &&
5074             linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0)
5075                 return -1;
5076
5077 #ifdef HOSTAPD
5078         if (type == WPA_IF_AP_BSS) {
5079                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
5080                         nl80211_remove_iface(drv, ifidx);
5081                         os_free(new_bss);
5082                         return -1;
5083                 }
5084                 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
5085                 new_bss->ifindex = ifidx;
5086                 new_bss->drv = drv;
5087                 new_bss->next = drv->first_bss.next;
5088                 drv->first_bss.next = new_bss;
5089                 if (drv_priv)
5090                         *drv_priv = new_bss;
5091         }
5092 #endif /* HOSTAPD */
5093
5094         return 0;
5095 }
5096
5097
5098 static int wpa_driver_nl80211_if_remove(void *priv,
5099                                         enum wpa_driver_if_type type,
5100                                         const char *ifname)
5101 {
5102         struct i802_bss *bss = priv;
5103         struct wpa_driver_nl80211_data *drv = bss->drv;
5104         int ifindex = if_nametoindex(ifname);
5105
5106         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
5107                    __func__, type, ifname, ifindex);
5108         if (ifindex <= 0)
5109                 return -1;
5110         nl80211_remove_iface(drv, ifindex);
5111
5112 #ifdef HOSTAPD
5113         if (type != WPA_IF_AP_BSS)
5114                 return 0;
5115
5116         if (bss != &drv->first_bss) {
5117                 struct i802_bss *tbss = &drv->first_bss;
5118
5119                 while (tbss) {
5120                         if (tbss->next != bss)
5121                                 continue;
5122
5123                         tbss->next = bss->next;
5124                         os_free(bss);
5125                         break;
5126                 }
5127         }
5128 #endif /* HOSTAPD */
5129
5130         return 0;
5131 }
5132
5133
5134 static int cookie_handler(struct nl_msg *msg, void *arg)
5135 {
5136         struct nlattr *tb[NL80211_ATTR_MAX + 1];
5137         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5138         u64 *cookie = arg;
5139         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
5140                   genlmsg_attrlen(gnlh, 0), NULL);
5141         if (tb[NL80211_ATTR_COOKIE])
5142                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
5143         return NL_SKIP;
5144 }
5145
5146
5147 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
5148                                           const u8 *dst, const u8 *src,
5149                                           const u8 *bssid,
5150                                           const u8 *data, size_t data_len)
5151 {
5152         struct i802_bss *bss = priv;
5153         struct wpa_driver_nl80211_data *drv = bss->drv;
5154         int ret = -1;
5155         struct nl_msg *msg;
5156         u8 *buf;
5157         struct ieee80211_hdr *hdr;
5158         u64 cookie;
5159
5160         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
5161                    drv->ifindex);
5162
5163         buf = os_zalloc(24 + data_len);
5164         if (buf == NULL)
5165                 return ret;
5166         os_memcpy(buf + 24, data, data_len);
5167         hdr = (struct ieee80211_hdr *) buf;
5168         hdr->frame_control =
5169                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
5170         os_memcpy(hdr->addr1, dst, ETH_ALEN);
5171         os_memcpy(hdr->addr2, src, ETH_ALEN);
5172         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
5173
5174         if (drv->nlmode == NL80211_IFTYPE_AP) {
5175                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
5176                 os_free(buf);
5177                 return ret;
5178         }
5179
5180         msg = nlmsg_alloc();
5181         if (!msg) {
5182                 os_free(buf);
5183                 return -1;
5184         }
5185
5186         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5187                     NL80211_CMD_ACTION, 0);
5188
5189         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5190         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5191         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
5192         os_free(buf);
5193         buf = NULL;
5194
5195         cookie = 0;
5196         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5197         msg = NULL;
5198         if (ret) {
5199                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
5200                            "(%s)", ret, strerror(-ret));
5201                 goto nla_put_failure;
5202         }
5203         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
5204                    "cookie 0x%llx", (long long unsigned int) cookie);
5205         drv->send_action_cookie = cookie;
5206         ret = 0;
5207
5208 nla_put_failure:
5209         os_free(buf);
5210         nlmsg_free(msg);
5211         return ret;
5212 }
5213
5214
5215 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
5216                                                 unsigned int duration)
5217 {
5218         struct i802_bss *bss = priv;
5219         struct wpa_driver_nl80211_data *drv = bss->drv;
5220         struct nl_msg *msg;
5221         int ret;
5222         u64 cookie;
5223
5224         msg = nlmsg_alloc();
5225         if (!msg)
5226                 return -1;
5227
5228         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5229                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
5230
5231         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5232         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5233         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5234
5235         cookie = 0;
5236         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5237         if (ret == 0) {
5238                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
5239                            "0x%llx for freq=%u MHz duration=%u",
5240                            (long long unsigned int) cookie, freq, duration);
5241                 drv->remain_on_chan_cookie = cookie;
5242                 return 0;
5243         }
5244         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
5245                    "(freq=%d duration=%u): %d (%s)",
5246                    freq, duration, ret, strerror(-ret));
5247 nla_put_failure:
5248         return -1;
5249 }
5250
5251
5252 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
5253 {
5254         struct i802_bss *bss = priv;
5255         struct wpa_driver_nl80211_data *drv = bss->drv;
5256         struct nl_msg *msg;
5257         int ret;
5258
5259         if (!drv->pending_remain_on_chan) {
5260                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
5261                            "to cancel");
5262                 return -1;
5263         }
5264
5265         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
5266                    "0x%llx",
5267                    (long long unsigned int) drv->remain_on_chan_cookie);
5268
5269         msg = nlmsg_alloc();
5270         if (!msg)
5271                 return -1;
5272
5273         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5274                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
5275
5276         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5277         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
5278
5279         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5280         if (ret == 0)
5281                 return 0;
5282         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
5283                    "%d (%s)", ret, strerror(-ret));
5284 nla_put_failure:
5285         return -1;
5286 }
5287
5288
5289 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
5290                                                         void *timeout_ctx)
5291 {
5292         struct wpa_driver_nl80211_data *drv = eloop_ctx;
5293         if (drv->monitor_ifidx < 0)
5294                 return; /* monitor interface already removed */
5295
5296         if (drv->nlmode != NL80211_IFTYPE_STATION)
5297                 return; /* not in station mode anymore */
5298
5299         if (drv->probe_req_report)
5300                 return; /* reporting enabled */
5301
5302         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
5303                    "Probe Request reporting needed anymore");
5304         nl80211_remove_monitor_interface(drv);
5305 }
5306
5307
5308 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
5309 {
5310         struct i802_bss *bss = priv;
5311         struct wpa_driver_nl80211_data *drv = bss->drv;
5312
5313         if (drv->nlmode != NL80211_IFTYPE_STATION) {
5314                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
5315                            "allowed in station mode (iftype=%d)",
5316                            drv->nlmode);
5317                 return -1;
5318         }
5319         drv->probe_req_report = report;
5320
5321         if (report) {
5322                 eloop_cancel_timeout(
5323                         wpa_driver_nl80211_probe_req_report_timeout,
5324                         drv, NULL);
5325                 if (drv->monitor_ifidx < 0 &&
5326                     nl80211_create_monitor_interface(drv))
5327                         return -1;
5328         } else {
5329                 /*
5330                  * It takes a while to remove the monitor interface, so try to
5331                  * avoid doing this if it is needed again shortly. Instead,
5332                  * schedule the interface to be removed later if no need for it
5333                  * is seen.
5334                  */
5335                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
5336                            "to be removed after 10 seconds of no use");
5337                 eloop_register_timeout(
5338                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
5339                         drv, NULL);
5340         }
5341
5342         return 0;
5343 }
5344
5345
5346 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5347                                      int ifindex, int disabled)
5348 {
5349         struct nl_msg *msg;
5350         struct nlattr *bands, *band;
5351         int ret;
5352
5353         msg = nlmsg_alloc();
5354         if (!msg)
5355                 return -1;
5356
5357         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5358                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5359         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5360
5361         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5362         if (!bands)
5363                 goto nla_put_failure;
5364
5365         /*
5366          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5367          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5368          * rates. All 5 GHz rates are left enabled.
5369          */
5370         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5371         if (!band)
5372                 goto nla_put_failure;
5373         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5374                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5375         nla_nest_end(msg, band);
5376
5377         nla_nest_end(msg, bands);
5378
5379         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5380         msg = NULL;
5381         if (ret) {
5382                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5383                            "(%s)", ret, strerror(-ret));
5384         }
5385
5386         return ret;
5387
5388 nla_put_failure:
5389         nlmsg_free(msg);
5390         return -1;
5391 }
5392
5393
5394 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5395 {
5396         struct i802_bss *bss = priv;
5397         struct wpa_driver_nl80211_data *drv = bss->drv;
5398         drv->disable_11b_rates = disabled;
5399         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5400 }
5401
5402
5403 static int wpa_driver_nl80211_deinit_ap(void *priv)
5404 {
5405         struct i802_bss *bss = priv;
5406         struct wpa_driver_nl80211_data *drv = bss->drv;
5407         if (drv->nlmode != NL80211_IFTYPE_AP)
5408                 return -1;
5409         wpa_driver_nl80211_del_beacon(drv);
5410         return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
5411 }
5412
5413
5414 static void wpa_driver_nl80211_resume(void *priv)
5415 {
5416         struct i802_bss *bss = priv;
5417         struct wpa_driver_nl80211_data *drv = bss->drv;
5418         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
5419                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5420                            "resume event");
5421         }
5422 }
5423
5424
5425 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
5426                                   const u8 *ies, size_t ies_len)
5427 {
5428         struct i802_bss *bss = priv;
5429         struct wpa_driver_nl80211_data *drv = bss->drv;
5430         int ret;
5431         u8 *data, *pos;
5432         size_t data_len;
5433         u8 own_addr[ETH_ALEN];
5434
5435         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
5436                 return -1;
5437
5438         if (action != 1) {
5439                 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
5440                            "action %d", action);
5441                 return -1;
5442         }
5443
5444         /*
5445          * Action frame payload:
5446          * Category[1] = 6 (Fast BSS Transition)
5447          * Action[1] = 1 (Fast BSS Transition Request)
5448          * STA Address
5449          * Target AP Address
5450          * FT IEs
5451          */
5452
5453         data_len = 2 + 2 * ETH_ALEN + ies_len;
5454         data = os_malloc(data_len);
5455         if (data == NULL)
5456                 return -1;
5457         pos = data;
5458         *pos++ = 0x06; /* FT Action category */
5459         *pos++ = action;
5460         os_memcpy(pos, own_addr, ETH_ALEN);
5461         pos += ETH_ALEN;
5462         os_memcpy(pos, target_ap, ETH_ALEN);
5463         pos += ETH_ALEN;
5464         os_memcpy(pos, ies, ies_len);
5465
5466         ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
5467                                              own_addr, drv->bssid,
5468                                              data, data_len);
5469         os_free(data);
5470
5471         return ret;
5472 }
5473
5474
5475 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
5476 {
5477         struct i802_bss *bss = priv;
5478         struct wpa_driver_nl80211_data *drv = bss->drv;
5479         struct nl_msg *msg, *cqm = NULL;
5480
5481         wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
5482                    "hysteresis=%d", threshold, hysteresis);
5483
5484         msg = nlmsg_alloc();
5485         if (!msg)
5486                 return -1;
5487
5488         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5489                     0, NL80211_CMD_SET_CQM, 0);
5490
5491         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
5492
5493         cqm = nlmsg_alloc();
5494         if (cqm == NULL)
5495                 return -1;
5496
5497         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
5498         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
5499         nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
5500
5501         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
5502                 return 0;
5503         msg = NULL;
5504
5505 nla_put_failure:
5506         if (cqm)
5507                 nlmsg_free(cqm);
5508         nlmsg_free(msg);
5509         return -1;
5510 }
5511
5512
5513 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
5514                               int encrypt)
5515 {
5516         struct i802_bss *bss = priv;
5517         struct wpa_driver_nl80211_data *drv = bss->drv;
5518         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
5519 }
5520
5521
5522 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5523         .name = "nl80211",
5524         .desc = "Linux nl80211/cfg80211",
5525         .get_bssid = wpa_driver_nl80211_get_bssid,
5526         .get_ssid = wpa_driver_nl80211_get_ssid,
5527         .set_key = wpa_driver_nl80211_set_key,
5528         .scan2 = wpa_driver_nl80211_scan,
5529         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5530         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5531         .disassociate = wpa_driver_nl80211_disassociate,
5532         .authenticate = wpa_driver_nl80211_authenticate,
5533         .associate = wpa_driver_nl80211_associate,
5534         .init = wpa_driver_nl80211_init,
5535         .deinit = wpa_driver_nl80211_deinit,
5536         .get_capa = wpa_driver_nl80211_get_capa,
5537         .set_operstate = wpa_driver_nl80211_set_operstate,
5538         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5539         .set_country = wpa_driver_nl80211_set_country,
5540         .set_beacon = wpa_driver_nl80211_set_beacon,
5541         .if_add = wpa_driver_nl80211_if_add,
5542         .if_remove = wpa_driver_nl80211_if_remove,
5543         .send_mlme = wpa_driver_nl80211_send_mlme,
5544         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5545         .sta_add = wpa_driver_nl80211_sta_add,
5546         .sta_remove = wpa_driver_nl80211_sta_remove,
5547         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5548         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5549 #ifdef HOSTAPD
5550         .hapd_init = i802_init,
5551         .hapd_deinit = i802_deinit,
5552         .get_seqnum = i802_get_seqnum,
5553         .flush = i802_flush,
5554         .read_sta_data = i802_read_sta_data,
5555         .sta_deauth = i802_sta_deauth,
5556         .sta_disassoc = i802_sta_disassoc,
5557         .get_inact_sec = i802_get_inact_sec,
5558         .sta_clear_stats = i802_sta_clear_stats,
5559         .set_rts = i802_set_rts,
5560         .set_frag = i802_set_frag,
5561         .set_rate_sets = i802_set_rate_sets,
5562         .set_cts_protect = i802_set_cts_protect,
5563         .set_preamble = i802_set_preamble,
5564         .set_short_slot_time = i802_set_short_slot_time,
5565         .set_tx_queue_params = i802_set_tx_queue_params,
5566         .set_sta_vlan = i802_set_sta_vlan,
5567         .set_wds_sta = i802_set_wds_sta,
5568 #endif /* HOSTAPD */
5569         .set_freq = i802_set_freq,
5570         .send_action = wpa_driver_nl80211_send_action,
5571         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5572         .cancel_remain_on_channel =
5573         wpa_driver_nl80211_cancel_remain_on_channel,
5574         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5575         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5576         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5577         .resume = wpa_driver_nl80211_resume,
5578         .send_ft_action = nl80211_send_ft_action,
5579         .signal_monitor = nl80211_signal_monitor,
5580         .send_frame = nl80211_send_frame,
5581 };