www.project-moonshot.org Git - mech_eap.orig/blob - 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         /* P2P Public Action */
1594         if (nl80211_register_action_frame(drv,
1595                                           (u8 *) "\x04\x09\x50\x6f\x9a\x09",
1596                                           6) < 0)
1597                 return -1;
1598         /* P2P Action */
1599         if (nl80211_register_action_frame(drv,
1600                                           (u8 *) "\x7f\x50\x6f\x9a\x09",
1601                                           5) < 0)
1602                 return -1;
1603 #endif /* CONFIG_P2P */
1604
1605         /* FT Action frames */
1606         if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
1607                 return -1;
1608         else
1609                 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
1610                         WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
1611
1612         return 0;
1613 }
1614
1615
1616 static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
1617 {
1618         wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
1619 }
1620
1621
1622 static int
1623 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1624 {
1625         struct i802_bss *bss = &drv->first_bss;
1626         int send_rfkill_event = 0;
1627
1628         drv->ifindex = if_nametoindex(bss->ifname);
1629         drv->first_bss.ifindex = drv->ifindex;
1630
1631 #ifndef HOSTAPD
1632         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
1633                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1634                            "use managed mode");
1635         }
1636
1637         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
1638                 if (rfkill_is_blocked(drv->rfkill)) {
1639                         wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
1640                                    "interface '%s' due to rfkill",
1641                                    bss->ifname);
1642                         drv->if_disabled = 1;
1643                         send_rfkill_event = 1;
1644                 } else {
1645                         wpa_printf(MSG_ERROR, "nl80211: Could not set "
1646                                    "interface '%s' UP", bss->ifname);
1647                         return -1;
1648                 }
1649         }
1650
1651         if (wpa_driver_nl80211_capa(drv))
1652                 return -1;
1653
1654         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1655                                1, IF_OPER_DORMANT);
1656 #endif /* HOSTAPD */
1657
1658         if (nl80211_register_action_frames(drv) < 0) {
1659                 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
1660                            "frame processing - ignore for now");
1661                 /*
1662                  * Older kernel versions did not support this, so ignore the
1663                  * error for now. Some functionality may not be available
1664                  * because of this.
1665                  */
1666         }
1667
1668         if (send_rfkill_event) {
1669                 eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
1670                                        drv, drv->ctx);
1671         }
1672
1673         return 0;
1674 }
1675
1676
1677 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1678 {
1679         struct nl_msg *msg;
1680
1681         msg = nlmsg_alloc();
1682         if (!msg)
1683                 return -ENOMEM;
1684
1685         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1686                     0, NL80211_CMD_DEL_BEACON, 0);
1687         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1688
1689         return send_and_recv_msgs(drv, msg, NULL, NULL);
1690  nla_put_failure:
1691         return -ENOBUFS;
1692 }
1693
1694
1695 /**
1696  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1697  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1698  *
1699  * Shut down driver interface and processing of driver events. Free
1700  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1701  */
1702 static void wpa_driver_nl80211_deinit(void *priv)
1703 {
1704         struct i802_bss *bss = priv;
1705         struct wpa_driver_nl80211_data *drv = bss->drv;
1706
1707         if (drv->added_if_into_bridge) {
1708                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
1709                     < 0)
1710                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1711                                    "interface %s from bridge %s: %s",
1712                                    bss->ifname, drv->brname, strerror(errno));
1713         }
1714         if (drv->added_bridge) {
1715                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1716                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1717                                    "bridge %s: %s",
1718                                    drv->brname, strerror(errno));
1719         }
1720
1721         nl80211_remove_monitor_interface(drv);
1722
1723         if (drv->nlmode == NL80211_IFTYPE_AP)
1724                 wpa_driver_nl80211_del_beacon(drv);
1725
1726 #ifdef HOSTAPD
1727         if (drv->last_freq_ht) {
1728                 /* Clear HT flags from the driver */
1729                 struct hostapd_freq_params freq;
1730                 os_memset(&freq, 0, sizeof(freq));
1731                 freq.freq = drv->last_freq;
1732                 i802_set_freq(priv, &freq);
1733         }
1734
1735         if (drv->eapol_sock >= 0) {
1736                 eloop_unregister_read_sock(drv->eapol_sock);
1737                 close(drv->eapol_sock);
1738         }
1739
1740         if (drv->if_indices != drv->default_if_indices)
1741                 os_free(drv->if_indices);
1742 #endif /* HOSTAPD */
1743
1744         if (drv->disable_11b_rates)
1745                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1746
1747         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1748         netlink_deinit(drv->netlink);
1749         rfkill_deinit(drv->rfkill);
1750
1751         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1752
1753         (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
1754         wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
1755
1756         if (drv->ioctl_sock >= 0)
1757                 close(drv->ioctl_sock);
1758
1759         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1760         genl_family_put(drv->nl80211);
1761         nl_cache_free(drv->nl_cache);
1762         nl_cache_free(drv->nl_cache_event);
1763         nl_handle_destroy(drv->nl_handle);
1764         nl_handle_destroy(drv->nl_handle_event);
1765         nl_cb_put(drv->nl_cb);
1766
1767         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1768                              drv, NULL);
1769
1770         os_free(drv->filter_ssids);
1771
1772         os_free(drv);
1773 }
1774
1775
1776 /**
1777  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1778  * @eloop_ctx: Driver private data
1779  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1780  *
1781  * This function can be used as registered timeout when starting a scan to
1782  * generate a scan completed event if the driver does not report this.
1783  */
1784 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1785 {
1786         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1787         if (drv->ap_scan_as_station) {
1788                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1789                                             IEEE80211_MODE_AP);
1790                 drv->ap_scan_as_station = 0;
1791         }
1792         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1793         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1794 }
1795
1796
1797 /**
1798  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1799  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1800  * @params: Scan parameters
1801  * Returns: 0 on success, -1 on failure
1802  */
1803 static int wpa_driver_nl80211_scan(void *priv,
1804                                    struct wpa_driver_scan_params *params)
1805 {
1806         struct i802_bss *bss = priv;
1807         struct wpa_driver_nl80211_data *drv = bss->drv;
1808         int ret = 0, timeout;
1809         struct nl_msg *msg, *ssids, *freqs;
1810         size_t i;
1811
1812         msg = nlmsg_alloc();
1813         ssids = nlmsg_alloc();
1814         freqs = nlmsg_alloc();
1815         if (!msg || !ssids || !freqs) {
1816                 nlmsg_free(msg);
1817                 nlmsg_free(ssids);
1818                 nlmsg_free(freqs);
1819                 return -1;
1820         }
1821
1822         os_free(drv->filter_ssids);
1823         drv->filter_ssids = params->filter_ssids;
1824         params->filter_ssids = NULL;
1825         drv->num_filter_ssids = params->num_filter_ssids;
1826
1827         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1828                     NL80211_CMD_TRIGGER_SCAN, 0);
1829
1830         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1831
1832         for (i = 0; i < params->num_ssids; i++) {
1833                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
1834                                   params->ssids[i].ssid,
1835                                   params->ssids[i].ssid_len);
1836                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1837                         params->ssids[i].ssid);
1838         }
1839         if (params->num_ssids)
1840                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1841
1842         if (params->extra_ies) {
1843                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
1844                                   params->extra_ies, params->extra_ies_len);
1845                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1846                         params->extra_ies);
1847         }
1848
1849         if (params->freqs) {
1850                 for (i = 0; params->freqs[i]; i++) {
1851                         wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
1852                                    "MHz", params->freqs[i]);
1853                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1854                 }
1855                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1856         }
1857
1858         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1859         msg = NULL;
1860         if (ret) {
1861                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1862                            "(%s)", ret, strerror(-ret));
1863 #ifdef HOSTAPD
1864                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1865                         /*
1866                          * mac80211 does not allow scan requests in AP mode, so
1867                          * try to do this in station mode.
1868                          */
1869                         if (wpa_driver_nl80211_set_mode(bss,
1870                                                         IEEE80211_MODE_INFRA))
1871                                 goto nla_put_failure;
1872
1873                         if (wpa_driver_nl80211_scan(drv, params)) {
1874                                 wpa_driver_nl80211_set_mode(bss,
1875                                                             IEEE80211_MODE_AP);
1876                                 goto nla_put_failure;
1877                         }
1878
1879                         /* Restore AP mode when processing scan results */
1880                         drv->ap_scan_as_station = 1;
1881                         ret = 0;
1882                 } else
1883                         goto nla_put_failure;
1884 #else /* HOSTAPD */
1885                 goto nla_put_failure;
1886 #endif /* HOSTAPD */
1887         }
1888
1889         /* Not all drivers generate "scan completed" wireless event, so try to
1890          * read results after a timeout. */
1891         timeout = 10;
1892         if (drv->scan_complete_events) {
1893                 /*
1894                  * The driver seems to deliver events to notify when scan is
1895                  * complete, so use longer timeout to avoid race conditions
1896                  * with scanning and following association request.
1897                  */
1898                 timeout = 30;
1899         }
1900         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1901                    "seconds", ret, timeout);
1902         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1903         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1904                                drv, drv->ctx);
1905
1906 nla_put_failure:
1907         nlmsg_free(ssids);
1908         nlmsg_free(msg);
1909         nlmsg_free(freqs);
1910         return ret;
1911 }
1912
1913
1914 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
1915 {
1916         const u8 *end, *pos;
1917
1918         if (ies == NULL)
1919                 return NULL;
1920
1921         pos = ies;
1922         end = ies + ies_len;
1923
1924         while (pos + 1 < end) {
1925                 if (pos + 2 + pos[1] > end)
1926                         break;
1927                 if (pos[0] == ie)
1928                         return pos;
1929                 pos += 2 + pos[1];
1930         }
1931
1932         return NULL;
1933 }
1934
1935
1936 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
1937                                  const u8 *ie, size_t ie_len)
1938 {
1939         const u8 *ssid;
1940         size_t i;
1941
1942         if (drv->filter_ssids == NULL)
1943                 return 0;
1944
1945         ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
1946         if (ssid == NULL)
1947                 return 1;
1948
1949         for (i = 0; i < drv->num_filter_ssids; i++) {
1950                 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
1951                     os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
1952                     0)
1953                         return 0;
1954         }
1955
1956         return 1;
1957 }
1958
1959
1960 struct nl80211_bss_info_arg {
1961         struct wpa_driver_nl80211_data *drv;
1962         struct wpa_scan_results *res;
1963 };
1964
1965 static int bss_info_handler(struct nl_msg *msg, void *arg)
1966 {
1967         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1968         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1969         struct nlattr *bss[NL80211_BSS_MAX + 1];
1970         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1971                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1972                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1973                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1974                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1975                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1976                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1977                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1978                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1979                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1980                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1981                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
1982         };
1983         struct nl80211_bss_info_arg *_arg = arg;
1984         struct wpa_scan_results *res = _arg->res;
1985         struct wpa_scan_res **tmp;
1986         struct wpa_scan_res *r;
1987         const u8 *ie, *beacon_ie;
1988         size_t ie_len, beacon_ie_len;
1989         u8 *pos;
1990
1991         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1992                   genlmsg_attrlen(gnlh, 0), NULL);
1993         if (!tb[NL80211_ATTR_BSS])
1994                 return NL_SKIP;
1995         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1996                              bss_policy))
1997                 return NL_SKIP;
1998         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1999                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2000                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2001         } else {
2002                 ie = NULL;
2003                 ie_len = 0;
2004         }
2005         if (bss[NL80211_BSS_BEACON_IES]) {
2006                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
2007                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
2008         } else {
2009                 beacon_ie = NULL;
2010                 beacon_ie_len = 0;
2011         }
2012
2013         if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
2014                                   ie ? ie_len : beacon_ie_len))
2015                 return NL_SKIP;
2016
2017         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
2018         if (r == NULL)
2019                 return NL_SKIP;
2020         if (bss[NL80211_BSS_BSSID])
2021                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
2022                           ETH_ALEN);
2023         if (bss[NL80211_BSS_FREQUENCY])
2024                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2025         if (bss[NL80211_BSS_BEACON_INTERVAL])
2026                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
2027         if (bss[NL80211_BSS_CAPABILITY])
2028                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2029         r->flags |= WPA_SCAN_NOISE_INVALID;
2030         if (bss[NL80211_BSS_SIGNAL_MBM]) {
2031                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
2032                 r->level /= 100; /* mBm to dBm */
2033                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
2034         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
2035                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
2036                 r->flags |= WPA_SCAN_LEVEL_INVALID;
2037         } else
2038                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
2039         if (bss[NL80211_BSS_TSF])
2040                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
2041         if (bss[NL80211_BSS_SEEN_MS_AGO])
2042                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
2043         r->ie_len = ie_len;
2044         pos = (u8 *) (r + 1);
2045         if (ie) {
2046                 os_memcpy(pos, ie, ie_len);
2047                 pos += ie_len;
2048         }
2049         r->beacon_ie_len = beacon_ie_len;
2050         if (beacon_ie)
2051                 os_memcpy(pos, beacon_ie, beacon_ie_len);
2052
2053         if (bss[NL80211_BSS_STATUS]) {
2054                 enum nl80211_bss_status status;
2055                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
2056                 switch (status) {
2057                 case NL80211_BSS_STATUS_AUTHENTICATED:
2058                         r->flags |= WPA_SCAN_AUTHENTICATED;
2059                         break;
2060                 case NL80211_BSS_STATUS_ASSOCIATED:
2061                         r->flags |= WPA_SCAN_ASSOCIATED;
2062                         break;
2063                 default:
2064                         break;
2065                 }
2066         }
2067
2068         tmp = os_realloc(res->res,
2069                          (res->num + 1) * sizeof(struct wpa_scan_res *));
2070         if (tmp == NULL) {
2071                 os_free(r);
2072                 return NL_SKIP;
2073         }
2074         tmp[res->num++] = r;
2075         res->res = tmp;
2076
2077         return NL_SKIP;
2078 }
2079
2080
2081 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
2082                                  const u8 *addr)
2083 {
2084         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
2085                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
2086                            "mismatch (" MACSTR ")", MAC2STR(addr));
2087                 wpa_driver_nl80211_mlme(drv, addr,
2088                                         NL80211_CMD_DEAUTHENTICATE,
2089                                         WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
2090         }
2091 }
2092
2093
2094 static void wpa_driver_nl80211_check_bss_status(
2095         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
2096 {
2097         size_t i;
2098
2099         for (i = 0; i < res->num; i++) {
2100                 struct wpa_scan_res *r = res->res[i];
2101                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
2102                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2103                                    "indicates BSS status with " MACSTR
2104                                    " as authenticated",
2105                                    MAC2STR(r->bssid));
2106                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2107                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
2108                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
2109                             0) {
2110                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
2111                                            " in local state (auth=" MACSTR
2112                                            " assoc=" MACSTR ")",
2113                                            MAC2STR(drv->auth_bssid),
2114                                            MAC2STR(drv->bssid));
2115                                 clear_state_mismatch(drv, r->bssid);
2116                         }
2117                 }
2118
2119                 if (r->flags & WPA_SCAN_ASSOCIATED) {
2120                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2121                                    "indicate BSS status with " MACSTR
2122                                    " as associated",
2123                                    MAC2STR(r->bssid));
2124                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2125                             !drv->associated) {
2126                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2127                                            "(not associated) does not match "
2128                                            "with BSS state");
2129                                 clear_state_mismatch(drv, r->bssid);
2130                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
2131                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
2132                                    0) {
2133                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2134                                            "(associated with " MACSTR ") does "
2135                                            "not match with BSS state",
2136                                            MAC2STR(drv->bssid));
2137                                 clear_state_mismatch(drv, r->bssid);
2138                                 clear_state_mismatch(drv, drv->bssid);
2139                         }
2140                 }
2141         }
2142 }
2143
2144
2145 static void wpa_scan_results_free(struct wpa_scan_results *res)
2146 {
2147         size_t i;
2148
2149         if (res == NULL)
2150                 return;
2151
2152         for (i = 0; i < res->num; i++)
2153                 os_free(res->res[i]);
2154         os_free(res->res);
2155         os_free(res);
2156 }
2157
2158
2159 static struct wpa_scan_results *
2160 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
2161 {
2162         struct nl_msg *msg;
2163         struct wpa_scan_results *res;
2164         int ret;
2165         struct nl80211_bss_info_arg arg;
2166
2167         res = os_zalloc(sizeof(*res));
2168         if (res == NULL)
2169                 return NULL;
2170         msg = nlmsg_alloc();
2171         if (!msg)
2172                 goto nla_put_failure;
2173
2174         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
2175                     NL80211_CMD_GET_SCAN, 0);
2176         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2177
2178         arg.drv = drv;
2179         arg.res = res;
2180         ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
2181         msg = NULL;
2182         if (ret == 0) {
2183                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
2184                            (unsigned long) res->num);
2185                 return res;
2186         }
2187         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
2188                    "(%s)", ret, strerror(-ret));
2189 nla_put_failure:
2190         nlmsg_free(msg);
2191         wpa_scan_results_free(res);
2192         return NULL;
2193 }
2194
2195
2196 /**
2197  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
2198  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2199  * Returns: Scan results on success, -1 on failure
2200  */
2201 static struct wpa_scan_results *
2202 wpa_driver_nl80211_get_scan_results(void *priv)
2203 {
2204         struct i802_bss *bss = priv;
2205         struct wpa_driver_nl80211_data *drv = bss->drv;
2206         struct wpa_scan_results *res;
2207
2208         res = nl80211_get_scan_results(drv);
2209         if (res)
2210                 wpa_driver_nl80211_check_bss_status(drv, res);
2211         return res;
2212 }
2213
2214
2215 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
2216 {
2217         struct wpa_scan_results *res;
2218         size_t i;
2219
2220         res = nl80211_get_scan_results(drv);
2221         if (res == NULL) {
2222                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
2223                 return;
2224         }
2225
2226         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
2227         for (i = 0; i < res->num; i++) {
2228                 struct wpa_scan_res *r = res->res[i];
2229                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
2230                            (int) i, (int) res->num, MAC2STR(r->bssid),
2231                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
2232                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
2233         }
2234
2235         wpa_scan_results_free(res);
2236 }
2237
2238
2239 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
2240                                       enum wpa_alg alg, const u8 *addr,
2241                                       int key_idx, int set_tx,
2242                                       const u8 *seq, size_t seq_len,
2243                                       const u8 *key, size_t key_len)
2244 {
2245         struct i802_bss *bss = priv;
2246         struct wpa_driver_nl80211_data *drv = bss->drv;
2247         int ifindex = if_nametoindex(ifname);
2248         struct nl_msg *msg;
2249         int ret;
2250
2251         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
2252                    "set_tx=%d seq_len=%lu key_len=%lu",
2253                    __func__, ifindex, alg, addr, key_idx, set_tx,
2254                    (unsigned long) seq_len, (unsigned long) key_len);
2255
2256         msg = nlmsg_alloc();
2257         if (!msg)
2258                 return -ENOMEM;
2259
2260         if (alg == WPA_ALG_NONE) {
2261                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2262                             0, NL80211_CMD_DEL_KEY, 0);
2263         } else {
2264                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2265                             0, NL80211_CMD_NEW_KEY, 0);
2266                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2267                 switch (alg) {
2268                 case WPA_ALG_WEP:
2269                         if (key_len == 5)
2270                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2271                                             WLAN_CIPHER_SUITE_WEP40);
2272                         else
2273                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2274                                             WLAN_CIPHER_SUITE_WEP104);
2275                         break;
2276                 case WPA_ALG_TKIP:
2277                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2278                                     WLAN_CIPHER_SUITE_TKIP);
2279                         break;
2280                 case WPA_ALG_CCMP:
2281                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2282                                     WLAN_CIPHER_SUITE_CCMP);
2283                         break;
2284                 case WPA_ALG_IGTK:
2285                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2286                                     WLAN_CIPHER_SUITE_AES_CMAC);
2287                         break;
2288                 default:
2289                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2290                                    "algorithm %d", __func__, alg);
2291                         nlmsg_free(msg);
2292                         return -1;
2293                 }
2294         }
2295
2296         if (seq && seq_len)
2297                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
2298
2299         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2300         {
2301                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
2302                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2303         }
2304         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2305         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2306
2307         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2308         if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
2309                 ret = 0;
2310         if (ret)
2311                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2312                            ret, strerror(-ret));
2313
2314         /*
2315          * If we failed or don't need to set the default TX key (below),
2316          * we're done here.
2317          */
2318         if (ret || !set_tx || alg == WPA_ALG_NONE)
2319                 return ret;
2320 #ifdef HOSTAPD
2321         if (addr)
2322                 return ret;
2323 #else /* HOSTAPD */
2324         if (drv->nlmode == NL80211_IFTYPE_AP && addr)
2325                 return ret;
2326 #endif /* HOSTAPD */
2327
2328         msg = nlmsg_alloc();
2329         if (!msg)
2330                 return -ENOMEM;
2331
2332         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2333                     0, NL80211_CMD_SET_KEY, 0);
2334         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2335         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2336         if (alg == WPA_ALG_IGTK)
2337                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2338         else
2339                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2340
2341         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2342         if (ret == -ENOENT)
2343                 ret = 0;
2344         if (ret)
2345                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2346                            "err=%d %s)", ret, strerror(-ret));
2347         return ret;
2348
2349 nla_put_failure:
2350         return -ENOBUFS;
2351 }
2352
2353
2354 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2355                       int key_idx, int defkey,
2356                       const u8 *seq, size_t seq_len,
2357                       const u8 *key, size_t key_len)
2358 {
2359         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2360         if (!key_attr)
2361                 return -1;
2362
2363         if (defkey && alg == WPA_ALG_IGTK)
2364                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2365         else if (defkey)
2366                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2367
2368         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2369
2370         switch (alg) {
2371         case WPA_ALG_WEP:
2372                 if (key_len == 5)
2373                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2374                                     WLAN_CIPHER_SUITE_WEP40);
2375                 else
2376                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2377                                     WLAN_CIPHER_SUITE_WEP104);
2378                 break;
2379         case WPA_ALG_TKIP:
2380                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2381                 break;
2382         case WPA_ALG_CCMP:
2383                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2384                 break;
2385         case WPA_ALG_IGTK:
2386                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2387                             WLAN_CIPHER_SUITE_AES_CMAC);
2388                 break;
2389         default:
2390                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2391                            "algorithm %d", __func__, alg);
2392                 return -1;
2393         }
2394
2395         if (seq && seq_len)
2396                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2397
2398         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2399
2400         nla_nest_end(msg, key_attr);
2401
2402         return 0;
2403  nla_put_failure:
2404         return -1;
2405 }
2406
2407
2408 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2409                                  struct nl_msg *msg)
2410 {
2411         int i, privacy = 0;
2412         struct nlattr *nl_keys, *nl_key;
2413
2414         for (i = 0; i < 4; i++) {
2415                 if (!params->wep_key[i])
2416                         continue;
2417                 privacy = 1;
2418                 break;
2419         }
2420         if (!privacy)
2421                 return 0;
2422
2423         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2424
2425         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2426         if (!nl_keys)
2427                 goto nla_put_failure;
2428
2429         for (i = 0; i < 4; i++) {
2430                 if (!params->wep_key[i])
2431                         continue;
2432
2433                 nl_key = nla_nest_start(msg, i);
2434                 if (!nl_key)
2435                         goto nla_put_failure;
2436
2437                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2438                         params->wep_key[i]);
2439                 if (params->wep_key_len[i] == 5)
2440                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2441                                     WLAN_CIPHER_SUITE_WEP40);
2442                 else
2443                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2444                                     WLAN_CIPHER_SUITE_WEP104);
2445
2446                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2447
2448                 if (i == params->wep_tx_keyidx)
2449                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2450
2451                 nla_nest_end(msg, nl_key);
2452         }
2453         nla_nest_end(msg, nl_keys);
2454
2455         return 0;
2456
2457 nla_put_failure:
2458         return -ENOBUFS;
2459 }
2460
2461
2462 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2463                                    const u8 *addr, int cmd, u16 reason_code,
2464                                    int local_state_change)
2465 {
2466         int ret = -1;
2467         struct nl_msg *msg;
2468
2469         msg = nlmsg_alloc();
2470         if (!msg)
2471                 return -1;
2472
2473         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2474
2475         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2476         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2477         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2478         if (local_state_change)
2479                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2480
2481         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2482         msg = NULL;
2483         if (ret) {
2484                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2485                            "(%s)", ret, strerror(-ret));
2486                 goto nla_put_failure;
2487         }
2488         ret = 0;
2489
2490 nla_put_failure:
2491         nlmsg_free(msg);
2492         return ret;
2493 }
2494
2495
2496 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2497                                          const u8 *addr, int reason_code)
2498 {
2499         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2500                    __func__, MAC2STR(addr), reason_code);
2501         drv->associated = 0;
2502         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2503                                        reason_code, 0);
2504 }
2505
2506
2507 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2508                                              int reason_code)
2509 {
2510         struct i802_bss *bss = priv;
2511         struct wpa_driver_nl80211_data *drv = bss->drv;
2512         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2513                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2514         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2515                    __func__, MAC2STR(addr), reason_code);
2516         drv->associated = 0;
2517         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2518                                        reason_code, 0);
2519 }
2520
2521
2522 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2523                                            int reason_code)
2524 {
2525         struct i802_bss *bss = priv;
2526         struct wpa_driver_nl80211_data *drv = bss->drv;
2527         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2528                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2529         wpa_printf(MSG_DEBUG, "%s", __func__);
2530         drv->associated = 0;
2531         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2532                                        reason_code, 0);
2533 }
2534
2535
2536 static int wpa_driver_nl80211_authenticate(
2537         void *priv, struct wpa_driver_auth_params *params)
2538 {
2539         struct i802_bss *bss = priv;
2540         struct wpa_driver_nl80211_data *drv = bss->drv;
2541         int ret = -1, i;
2542         struct nl_msg *msg;
2543         enum nl80211_auth_type type;
2544         int count = 0;
2545
2546         drv->associated = 0;
2547         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2548         /* FIX: IBSS mode */
2549         if (drv->nlmode != NL80211_IFTYPE_STATION)
2550                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2551
2552         if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2553                 return -1;
2554
2555 retry:
2556         msg = nlmsg_alloc();
2557         if (!msg)
2558                 return -1;
2559
2560         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2561                    drv->ifindex);
2562
2563         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2564                     NL80211_CMD_AUTHENTICATE, 0);
2565
2566         for (i = 0; i < 4; i++) {
2567                 if (!params->wep_key[i])
2568                         continue;
2569                 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
2570                                            NULL, i,
2571                                            i == params->wep_tx_keyidx, NULL, 0,
2572                                            params->wep_key[i],
2573                                            params->wep_key_len[i]);
2574                 if (params->wep_tx_keyidx != i)
2575                         continue;
2576                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2577                                params->wep_key[i], params->wep_key_len[i])) {
2578                         nlmsg_free(msg);
2579                         return -1;
2580                 }
2581         }
2582
2583         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2584         if (params->bssid) {
2585                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2586                            MAC2STR(params->bssid));
2587                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2588         }
2589         if (params->freq) {
2590                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2591                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2592         }
2593         if (params->ssid) {
2594                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2595                                   params->ssid, params->ssid_len);
2596                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2597                         params->ssid);
2598         }
2599         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2600         if (params->ie)
2601                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2602         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2603                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2604         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2605                 type = NL80211_AUTHTYPE_SHARED_KEY;
2606         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2607                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2608         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2609                 type = NL80211_AUTHTYPE_FT;
2610         else
2611                 goto nla_put_failure;
2612         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2613         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2614         if (params->local_state_change) {
2615                 wpa_printf(MSG_DEBUG, "  * Local state change only");
2616                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2617         }
2618
2619         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2620         msg = NULL;
2621         if (ret) {
2622                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2623                            "(%s)", ret, strerror(-ret));
2624                 count++;
2625                 if (ret == -EALREADY && count == 1 && params->bssid &&
2626                     !params->local_state_change) {
2627                         /*
2628                          * mac80211 does not currently accept new
2629                          * authentication if we are already authenticated. As a
2630                          * workaround, force deauthentication and try again.
2631                          */
2632                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2633                                    "after forced deauthentication");
2634                         wpa_driver_nl80211_deauthenticate(
2635                                 bss, params->bssid,
2636                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2637                         nlmsg_free(msg);
2638                         goto retry;
2639                 }
2640                 goto nla_put_failure;
2641         }
2642         ret = 0;
2643         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2644                    "successfully");
2645
2646 nla_put_failure:
2647         nlmsg_free(msg);
2648         return ret;
2649 }
2650
2651
2652 struct phy_info_arg {
2653         u16 *num_modes;
2654         struct hostapd_hw_modes *modes;
2655 };
2656
2657 static int phy_info_handler(struct nl_msg *msg, void *arg)
2658 {
2659         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2660         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2661         struct phy_info_arg *phy_info = arg;
2662
2663         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2664
2665         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2666         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2667                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2668                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2669                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2670                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2671                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2672                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2673         };
2674
2675         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2676         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2677                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2678                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2679         };
2680
2681         struct nlattr *nl_band;
2682         struct nlattr *nl_freq;
2683         struct nlattr *nl_rate;
2684         int rem_band, rem_freq, rem_rate;
2685         struct hostapd_hw_modes *mode;
2686         int idx, mode_is_set;
2687
2688         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2689                   genlmsg_attrlen(gnlh, 0), NULL);
2690
2691         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2692                 return NL_SKIP;
2693
2694         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2695                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2696                 if (!mode)
2697                         return NL_SKIP;
2698                 phy_info->modes = mode;
2699
2700                 mode_is_set = 0;
2701
2702                 mode = &phy_info->modes[*(phy_info->num_modes)];
2703                 memset(mode, 0, sizeof(*mode));
2704                 *(phy_info->num_modes) += 1;
2705
2706                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2707                           nla_len(nl_band), NULL);
2708
2709                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2710                         mode->ht_capab = nla_get_u16(
2711                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2712                 }
2713
2714                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2715                         mode->a_mpdu_params |= nla_get_u8(
2716                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2717                                 0x03;
2718                 }
2719
2720                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2721                         mode->a_mpdu_params |= nla_get_u8(
2722                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2723                                 2;
2724                 }
2725
2726                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2727                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2728                         u8 *mcs;
2729                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2730                         os_memcpy(mode->mcs_set, mcs, 16);
2731                 }
2732
2733                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2734                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2735                                   nla_len(nl_freq), freq_policy);
2736                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2737                                 continue;
2738                         mode->num_channels++;
2739                 }
2740
2741                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2742                 if (!mode->channels)
2743                         return NL_SKIP;
2744
2745                 idx = 0;
2746
2747                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2748                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2749                                   nla_len(nl_freq), freq_policy);
2750                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2751                                 continue;
2752
2753                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2754                         mode->channels[idx].flag = 0;
2755
2756                         if (!mode_is_set) {
2757                                 /* crude heuristic */
2758                                 if (mode->channels[idx].freq < 4000)
2759                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2760                                 else
2761                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2762                                 mode_is_set = 1;
2763                         }
2764
2765                         /* crude heuristic */
2766                         if (mode->channels[idx].freq < 4000)
2767                                 if (mode->channels[idx].freq == 2484)
2768                                         mode->channels[idx].chan = 14;
2769                                 else
2770                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2771                         else
2772                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2773
2774                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2775                                 mode->channels[idx].flag |=
2776                                         HOSTAPD_CHAN_DISABLED;
2777                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2778                                 mode->channels[idx].flag |=
2779                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2780                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2781                                 mode->channels[idx].flag |=
2782                                         HOSTAPD_CHAN_NO_IBSS;
2783                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2784                                 mode->channels[idx].flag |=
2785                                         HOSTAPD_CHAN_RADAR;
2786
2787                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2788                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2789                                 mode->channels[idx].max_tx_power =
2790                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2791
2792                         idx++;
2793                 }
2794
2795                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2796                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2797                                   nla_len(nl_rate), rate_policy);
2798                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2799                                 continue;
2800                         mode->num_rates++;
2801                 }
2802
2803                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2804                 if (!mode->rates)
2805                         return NL_SKIP;
2806
2807                 idx = 0;
2808
2809                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2810                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2811                                   nla_len(nl_rate), rate_policy);
2812                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2813                                 continue;
2814                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2815
2816                         /* crude heuristic */
2817                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2818                             mode->rates[idx] > 200)
2819                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2820
2821                         idx++;
2822                 }
2823         }
2824
2825         return NL_SKIP;
2826 }
2827
2828 static struct hostapd_hw_modes *
2829 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2830 {
2831         u16 m;
2832         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2833         int i, mode11g_idx = -1;
2834
2835         /* If only 802.11g mode is included, use it to construct matching
2836          * 802.11b mode data. */
2837
2838         for (m = 0; m < *num_modes; m++) {
2839                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2840                         return modes; /* 802.11b already included */
2841                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2842                         mode11g_idx = m;
2843         }
2844
2845         if (mode11g_idx < 0)
2846                 return modes; /* 2.4 GHz band not supported at all */
2847
2848         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2849         if (nmodes == NULL)
2850                 return modes; /* Could not add 802.11b mode */
2851
2852         mode = &nmodes[*num_modes];
2853         os_memset(mode, 0, sizeof(*mode));
2854         (*num_modes)++;
2855         modes = nmodes;
2856
2857         mode->mode = HOSTAPD_MODE_IEEE80211B;
2858
2859         mode11g = &modes[mode11g_idx];
2860         mode->num_channels = mode11g->num_channels;
2861         mode->channels = os_malloc(mode11g->num_channels *
2862                                    sizeof(struct hostapd_channel_data));
2863         if (mode->channels == NULL) {
2864                 (*num_modes)--;
2865                 return modes; /* Could not add 802.11b mode */
2866         }
2867         os_memcpy(mode->channels, mode11g->channels,
2868                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2869
2870         mode->num_rates = 0;
2871         mode->rates = os_malloc(4 * sizeof(int));
2872         if (mode->rates == NULL) {
2873                 os_free(mode->channels);
2874                 (*num_modes)--;
2875                 return modes; /* Could not add 802.11b mode */
2876         }
2877
2878         for (i = 0; i < mode11g->num_rates; i++) {
2879                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2880                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2881                         continue;
2882                 mode->rates[mode->num_rates] = mode11g->rates[i];
2883                 mode->num_rates++;
2884                 if (mode->num_rates == 4)
2885                         break;
2886         }
2887
2888         if (mode->num_rates == 0) {
2889                 os_free(mode->channels);
2890                 os_free(mode->rates);
2891                 (*num_modes)--;
2892                 return modes; /* No 802.11b rates */
2893         }
2894
2895         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2896                    "information");
2897
2898         return modes;
2899 }
2900
2901
2902 static struct hostapd_hw_modes *
2903 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2904 {
2905         struct i802_bss *bss = priv;
2906         struct wpa_driver_nl80211_data *drv = bss->drv;
2907         struct nl_msg *msg;
2908         struct phy_info_arg result = {
2909                 .num_modes = num_modes,
2910                 .modes = NULL,
2911         };
2912
2913         *num_modes = 0;
2914         *flags = 0;
2915
2916         msg = nlmsg_alloc();
2917         if (!msg)
2918                 return NULL;
2919
2920         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2921                     0, NL80211_CMD_GET_WIPHY, 0);
2922
2923         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2924
2925         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2926                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2927  nla_put_failure:
2928         return NULL;
2929 }
2930
2931
2932 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2933                                          const void *data, size_t len,
2934                                          int encrypt)
2935 {
2936         __u8 rtap_hdr[] = {
2937                 0x00, 0x00, /* radiotap version */
2938                 0x0e, 0x00, /* radiotap length */
2939                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2940                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2941                 0x00,       /* padding */
2942                 0x00, 0x00, /* RX and TX flags to indicate that */
2943                 0x00, 0x00, /* this is the injected frame directly */
2944         };
2945         struct iovec iov[2] = {
2946                 {
2947                         .iov_base = &rtap_hdr,
2948                         .iov_len = sizeof(rtap_hdr),
2949                 },
2950                 {
2951                         .iov_base = (void *) data,
2952                         .iov_len = len,
2953                 }
2954         };
2955         struct msghdr msg = {
2956                 .msg_name = NULL,
2957                 .msg_namelen = 0,
2958                 .msg_iov = iov,
2959                 .msg_iovlen = 2,
2960                 .msg_control = NULL,
2961                 .msg_controllen = 0,
2962                 .msg_flags = 0,
2963         };
2964
2965         if (encrypt)
2966                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2967
2968         return sendmsg(drv->monitor_sock, &msg, 0);
2969 }
2970
2971
2972 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2973                                         size_t data_len)
2974 {
2975         struct i802_bss *bss = priv;
2976         struct wpa_driver_nl80211_data *drv = bss->drv;
2977         struct ieee80211_mgmt *mgmt;
2978         int encrypt = 1;
2979         u16 fc;
2980
2981         mgmt = (struct ieee80211_mgmt *) data;
2982         fc = le_to_host16(mgmt->frame_control);
2983
2984         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2985             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2986                 /*
2987                  * Only one of the authentication frame types is encrypted.
2988                  * In order for static WEP encryption to work properly (i.e.,
2989                  * to not encrypt the frame), we need to tell mac80211 about
2990                  * the frames that must not be encrypted.
2991                  */
2992                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2993                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2994                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2995                         encrypt = 0;
2996         }
2997
2998         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2999 }
3000
3001
3002 static int wpa_driver_nl80211_set_beacon(void *priv,
3003                                          const u8 *head, size_t head_len,
3004                                          const u8 *tail, size_t tail_len,
3005                                          int dtim_period, int beacon_int)
3006 {
3007         struct i802_bss *bss = priv;
3008         struct wpa_driver_nl80211_data *drv = bss->drv;
3009         struct nl_msg *msg;
3010         u8 cmd = NL80211_CMD_NEW_BEACON;
3011         int ret;
3012         int beacon_set;
3013         int ifindex = if_nametoindex(bss->ifname);
3014
3015         beacon_set = bss->beacon_set;
3016
3017         msg = nlmsg_alloc();
3018         if (!msg)
3019                 return -ENOMEM;
3020
3021         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
3022                    beacon_set);
3023         if (beacon_set)
3024                 cmd = NL80211_CMD_SET_BEACON;
3025
3026         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3027                     0, cmd, 0);
3028         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3029         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3030         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3031         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
3032         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3033
3034         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3035         if (ret) {
3036                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
3037                            ret, strerror(-ret));
3038         } else {
3039                 bss->beacon_set = 1;
3040         }
3041         return ret;
3042  nla_put_failure:
3043         return -ENOBUFS;
3044 }
3045
3046
3047 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
3048                                        int freq, int ht_enabled,
3049                                        int sec_channel_offset)
3050 {
3051         struct nl_msg *msg;
3052         int ret;
3053
3054         msg = nlmsg_alloc();
3055         if (!msg)
3056                 return -1;
3057
3058         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3059                     NL80211_CMD_SET_WIPHY, 0);
3060
3061         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3062         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
3063         if (ht_enabled) {
3064                 switch (sec_channel_offset) {
3065                 case -1:
3066                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3067                                     NL80211_CHAN_HT40MINUS);
3068                         break;
3069                 case 1:
3070                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3071                                     NL80211_CHAN_HT40PLUS);
3072                         break;
3073                 default:
3074                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3075                                     NL80211_CHAN_HT20);
3076                         break;
3077                 }
3078         }
3079
3080         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3081         if (ret == 0)
3082                 return 0;
3083         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
3084                    "%d (%s)", freq, ret, strerror(-ret));
3085 nla_put_failure:
3086         return -1;
3087 }
3088
3089
3090 static int wpa_driver_nl80211_sta_add(void *priv,
3091                                       struct hostapd_sta_add_params *params)
3092 {
3093         struct i802_bss *bss = priv;
3094         struct wpa_driver_nl80211_data *drv = bss->drv;
3095         struct nl_msg *msg;
3096         int ret = -ENOBUFS;
3097
3098         msg = nlmsg_alloc();
3099         if (!msg)
3100                 return -ENOMEM;
3101
3102         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3103                     0, NL80211_CMD_NEW_STATION, 0);
3104
3105         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
3106         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3107         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3108         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3109                 params->supp_rates);
3110         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3111                     params->listen_interval);
3112         if (params->ht_capabilities) {
3113                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3114                         sizeof(*params->ht_capabilities),
3115                         params->ht_capabilities);
3116         }
3117
3118         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3119         if (ret)
3120                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3121                            "result: %d (%s)", ret, strerror(-ret));
3122         if (ret == -EEXIST)
3123                 ret = 0;
3124  nla_put_failure:
3125         return ret;
3126 }
3127
3128
3129 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
3130 {
3131         struct i802_bss *bss = priv;
3132         struct wpa_driver_nl80211_data *drv = bss->drv;
3133         struct nl_msg *msg;
3134         int ret;
3135
3136         msg = nlmsg_alloc();
3137         if (!msg)
3138                 return -ENOMEM;
3139
3140         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3141                     0, NL80211_CMD_DEL_STATION, 0);
3142
3143         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3144                     if_nametoindex(bss->ifname));
3145         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3146
3147         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3148         if (ret == -ENOENT)
3149                 return 0;
3150         return ret;
3151  nla_put_failure:
3152         return -ENOBUFS;
3153 }
3154
3155
3156 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
3157                                  int ifidx)
3158 {
3159         struct nl_msg *msg;
3160
3161         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
3162
3163 #ifdef HOSTAPD
3164         /* stop listening for EAPOL on this interface */
3165         del_ifidx(drv, ifidx);
3166 #endif /* HOSTAPD */
3167
3168         msg = nlmsg_alloc();
3169         if (!msg)
3170                 goto nla_put_failure;
3171
3172         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3173                     0, NL80211_CMD_DEL_INTERFACE, 0);
3174         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3175
3176         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3177                 return;
3178  nla_put_failure:
3179         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
3180 }
3181
3182
3183 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
3184                                      const char *ifname,
3185                                      enum nl80211_iftype iftype,
3186                                      const u8 *addr, int wds)
3187 {
3188         struct nl_msg *msg, *flags = NULL;
3189         int ifidx;
3190         int ret = -ENOBUFS;
3191
3192         msg = nlmsg_alloc();
3193         if (!msg)
3194                 return -1;
3195
3196         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3197                     0, NL80211_CMD_NEW_INTERFACE, 0);
3198         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3199         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3200         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3201
3202         if (iftype == NL80211_IFTYPE_MONITOR) {
3203                 int err;
3204
3205                 flags = nlmsg_alloc();
3206                 if (!flags)
3207                         goto nla_put_failure;
3208
3209                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3210
3211                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3212
3213                 nlmsg_free(flags);
3214
3215                 if (err)
3216                         goto nla_put_failure;
3217         } else if (wds) {
3218                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
3219         }
3220
3221         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3222         if (ret) {
3223  nla_put_failure:
3224                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
3225                            ifname, ret, strerror(-ret));
3226                 return ret;
3227         }
3228
3229         ifidx = if_nametoindex(ifname);
3230         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
3231                    ifname, ifidx);
3232
3233         if (ifidx <= 0)
3234                 return -1;
3235
3236 #ifdef HOSTAPD
3237         /* start listening for EAPOL on this interface */
3238         add_ifidx(drv, ifidx);
3239 #endif /* HOSTAPD */
3240
3241         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
3242             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
3243                 nl80211_remove_iface(drv, ifidx);
3244                 return -1;
3245         }
3246
3247         return ifidx;
3248 }
3249
3250
3251 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3252                                 const char *ifname, enum nl80211_iftype iftype,
3253                                 const u8 *addr, int wds)
3254 {
3255         int ret;
3256
3257         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
3258
3259         /* if error occured and interface exists already */
3260         if (ret == -ENFILE && if_nametoindex(ifname)) {
3261                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
3262
3263                 /* Try to remove the interface that was already there. */
3264                 nl80211_remove_iface(drv, if_nametoindex(ifname));
3265
3266                 /* Try to create the interface again */
3267                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
3268                                                 wds);
3269         }
3270
3271         if (ret >= 0 && drv->disable_11b_rates)
3272                 nl80211_disable_11b_rates(drv, ret, 1);
3273
3274         return ret;
3275 }
3276
3277
3278 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
3279 {
3280         struct ieee80211_hdr *hdr;
3281         u16 fc;
3282         union wpa_event_data event;
3283
3284         hdr = (struct ieee80211_hdr *) buf;
3285         fc = le_to_host16(hdr->frame_control);
3286
3287         os_memset(&event, 0, sizeof(event));
3288         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
3289         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
3290         event.tx_status.dst = hdr->addr1;
3291         event.tx_status.data = buf;
3292         event.tx_status.data_len = len;
3293         event.tx_status.ack = ok;
3294         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
3295 }
3296
3297
3298 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
3299                              u8 *buf, size_t len)
3300 {
3301         union wpa_event_data event;
3302         os_memset(&event, 0, sizeof(event));
3303         event.rx_from_unknown.frame = buf;
3304         event.rx_from_unknown.len = len;
3305         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
3306 }
3307
3308
3309 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3310                          u8 *buf, size_t len, int datarate, int ssi_signal)
3311 {
3312         struct ieee80211_hdr *hdr;
3313         u16 fc;
3314         union wpa_event_data event;
3315
3316         hdr = (struct ieee80211_hdr *) buf;
3317         fc = le_to_host16(hdr->frame_control);
3318
3319         switch (WLAN_FC_GET_TYPE(fc)) {
3320         case WLAN_FC_TYPE_MGMT:
3321                 os_memset(&event, 0, sizeof(event));
3322                 event.rx_mgmt.frame = buf;
3323                 event.rx_mgmt.frame_len = len;
3324                 event.rx_mgmt.datarate = datarate;
3325                 event.rx_mgmt.ssi_signal = ssi_signal;
3326                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3327                 break;
3328         case WLAN_FC_TYPE_CTRL:
3329                 /* can only get here with PS-Poll frames */
3330                 wpa_printf(MSG_DEBUG, "CTRL");
3331                 from_unknown_sta(drv, buf, len);
3332                 break;
3333         case WLAN_FC_TYPE_DATA:
3334                 from_unknown_sta(drv, buf, len);
3335                 break;
3336         }
3337 }
3338
3339
3340 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3341 {
3342         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3343         int len;
3344         unsigned char buf[3000];
3345         struct ieee80211_radiotap_iterator iter;
3346         int ret;
3347         int datarate = 0, ssi_signal = 0;
3348         int injected = 0, failed = 0, rxflags = 0;
3349
3350         len = recv(sock, buf, sizeof(buf), 0);
3351         if (len < 0) {
3352                 perror("recv");
3353                 return;
3354         }
3355
3356         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3357                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3358                            "frame since Probe Request reporting is disabled");
3359                 return;
3360         }
3361
3362         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3363                 printf("received invalid radiotap frame\n");
3364                 return;
3365         }
3366
3367         while (1) {
3368                 ret = ieee80211_radiotap_iterator_next(&iter);
3369                 if (ret == -ENOENT)
3370                         break;
3371                 if (ret) {
3372                         printf("received invalid radiotap frame (%d)\n", ret);
3373                         return;
3374                 }
3375                 switch (iter.this_arg_index) {
3376                 case IEEE80211_RADIOTAP_FLAGS:
3377                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3378                                 len -= 4;
3379                         break;
3380                 case IEEE80211_RADIOTAP_RX_FLAGS:
3381                         rxflags = 1;
3382                         break;
3383                 case IEEE80211_RADIOTAP_TX_FLAGS:
3384                         injected = 1;
3385                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3386                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3387                         break;
3388                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3389                         break;
3390                 case IEEE80211_RADIOTAP_CHANNEL:
3391                         /* TODO: convert from freq/flags to channel number */
3392                         break;
3393                 case IEEE80211_RADIOTAP_RATE:
3394                         datarate = *iter.this_arg * 5;
3395                         break;
3396                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3397                         ssi_signal = *iter.this_arg;
3398                         break;
3399                 }
3400         }
3401
3402         if (rxflags && injected)
3403                 return;
3404
3405         if (!injected)
3406                 handle_frame(drv, buf + iter.max_length,
3407                              len - iter.max_length, datarate, ssi_signal);
3408         else
3409                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3410                                    len - iter.max_length, !failed);
3411 }
3412
3413
3414 /*
3415  * we post-process the filter code later and rewrite
3416  * this to the offset to the last instruction
3417  */
3418 #define PASS    0xFF
3419 #define FAIL    0xFE
3420
3421 static struct sock_filter msock_filter_insns[] = {
3422         /*
3423          * do a little-endian load of the radiotap length field
3424          */
3425         /* load lower byte into A */
3426         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3427         /* put it into X (== index register) */
3428         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3429         /* load upper byte into A */
3430         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3431         /* left-shift it by 8 */
3432         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3433         /* or with X */
3434         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3435         /* put result into X */
3436         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3437
3438         /*
3439          * Allow management frames through, this also gives us those
3440          * management frames that we sent ourselves with status
3441          */
3442         /* load the lower byte of the IEEE 802.11 frame control field */
3443         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3444         /* mask off frame type and version */
3445         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3446         /* accept frame if it's both 0, fall through otherwise */
3447         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3448
3449         /*
3450          * TODO: add a bit to radiotap RX flags that indicates
3451          * that the sending station is not associated, then
3452          * add a filter here that filters on our DA and that flag
3453          * to allow us to deauth frames to that bad station.
3454          *
3455          * Not a regression -- we didn't do it before either.
3456          */
3457
3458 #if 0
3459         /*
3460          * drop non-data frames
3461          */
3462         /* load the lower byte of the frame control field */
3463         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3464         /* mask off QoS bit */
3465         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3466         /* drop non-data frames */
3467         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3468 #endif
3469         /* load the upper byte of the frame control field */
3470         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3471         /* mask off toDS/fromDS */
3472         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3473         /* accept WDS frames */
3474         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3475
3476         /*
3477          * add header length to index
3478          */
3479         /* load the lower byte of the frame control field */
3480         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3481         /* mask off QoS bit */
3482         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3483         /* right shift it by 6 to give 0 or 2 */
3484         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3485         /* add data frame header length */
3486         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3487         /* add index, was start of 802.11 header */
3488         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3489         /* move to index, now start of LL header */
3490         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3491
3492         /*
3493          * Accept empty data frames, we use those for
3494          * polling activity.
3495          */
3496         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3497         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3498
3499         /*
3500          * Accept EAPOL frames
3501          */
3502         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3503         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3504         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3505         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3506
3507         /* keep these last two statements or change the code below */
3508         /* return 0 == "DROP" */
3509         BPF_STMT(BPF_RET | BPF_K, 0),
3510         /* return ~0 == "keep all" */
3511         BPF_STMT(BPF_RET | BPF_K, ~0),
3512 };
3513
3514 static struct sock_fprog msock_filter = {
3515         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3516         .filter = msock_filter_insns,
3517 };
3518
3519
3520 static int add_monitor_filter(int s)
3521 {
3522         int idx;
3523
3524         /* rewrite all PASS/FAIL jump offsets */
3525         for (idx = 0; idx < msock_filter.len; idx++) {
3526                 struct sock_filter *insn = &msock_filter_insns[idx];
3527
3528                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3529                         if (insn->code == (BPF_JMP|BPF_JA)) {
3530                                 if (insn->k == PASS)
3531                                         insn->k = msock_filter.len - idx - 2;
3532                                 else if (insn->k == FAIL)
3533                                         insn->k = msock_filter.len - idx - 3;
3534                         }
3535
3536                         if (insn->jt == PASS)
3537                                 insn->jt = msock_filter.len - idx - 2;
3538                         else if (insn->jt == FAIL)
3539                                 insn->jt = msock_filter.len - idx - 3;
3540
3541                         if (insn->jf == PASS)
3542                                 insn->jf = msock_filter.len - idx - 2;
3543                         else if (insn->jf == FAIL)
3544                                 insn->jf = msock_filter.len - idx - 3;
3545                 }
3546         }
3547
3548         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3549                        &msock_filter, sizeof(msock_filter))) {
3550                 perror("SO_ATTACH_FILTER");
3551                 return -1;
3552         }
3553
3554         return 0;
3555 }
3556
3557
3558 static void nl80211_remove_monitor_interface(
3559         struct wpa_driver_nl80211_data *drv)
3560 {
3561         if (drv->monitor_ifidx >= 0) {
3562                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3563                 drv->monitor_ifidx = -1;
3564         }
3565         if (drv->monitor_sock >= 0) {
3566                 eloop_unregister_read_sock(drv->monitor_sock);
3567                 close(drv->monitor_sock);
3568                 drv->monitor_sock = -1;
3569         }
3570 }
3571
3572
3573 static int
3574 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3575 {
3576         char buf[IFNAMSIZ];
3577         struct sockaddr_ll ll;
3578         int optval;
3579         socklen_t optlen;
3580
3581         snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
3582         buf[IFNAMSIZ - 1] = '\0';
3583
3584         drv->monitor_ifidx =
3585                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3586                                      0);
3587
3588         if (drv->monitor_ifidx < 0)
3589                 return -1;
3590
3591         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3592                 goto error;
3593
3594         memset(&ll, 0, sizeof(ll));
3595         ll.sll_family = AF_PACKET;
3596         ll.sll_ifindex = drv->monitor_ifidx;
3597         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3598         if (drv->monitor_sock < 0) {
3599                 perror("socket[PF_PACKET,SOCK_RAW]");
3600                 goto error;
3601         }
3602
3603         if (add_monitor_filter(drv->monitor_sock)) {
3604                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3605                            "interface; do filtering in user space");
3606                 /* This works, but will cost in performance. */
3607         }
3608
3609         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3610                 perror("monitor socket bind");
3611                 goto error;
3612         }
3613
3614         optlen = sizeof(optval);
3615         optval = 20;
3616         if (setsockopt
3617             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3618                 perror("Failed to set socket priority");
3619                 goto error;
3620         }
3621
3622         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3623                                      drv, NULL)) {
3624                 printf("Could not register monitor read socket\n");
3625                 goto error;
3626         }
3627
3628         return 0;
3629  error:
3630         nl80211_remove_monitor_interface(drv);
3631         return -1;
3632 }
3633
3634
3635 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3636
3637 static int wpa_driver_nl80211_hapd_send_eapol(
3638         void *priv, const u8 *addr, const u8 *data,
3639         size_t data_len, int encrypt, const u8 *own_addr)
3640 {
3641         struct i802_bss *bss = priv;
3642         struct wpa_driver_nl80211_data *drv = bss->drv;
3643         struct ieee80211_hdr *hdr;
3644         size_t len;
3645         u8 *pos;
3646         int res;
3647 #if 0 /* FIX */
3648         int qos = sta->flags & WPA_STA_WMM;
3649 #else
3650         int qos = 0;
3651 #endif
3652
3653         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3654                 data_len;
3655         hdr = os_zalloc(len);
3656         if (hdr == NULL) {
3657                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3658                        (unsigned long) len);
3659                 return -1;
3660         }
3661
3662         hdr->frame_control =
3663                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3664         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3665         if (encrypt)
3666                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3667 #if 0 /* To be enabled if qos determination is added above */
3668         if (qos) {
3669                 hdr->frame_control |=
3670                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3671         }
3672 #endif
3673
3674         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3675         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3676         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3677         pos = (u8 *) (hdr + 1);
3678
3679 #if 0 /* To be enabled if qos determination is added above */
3680         if (qos) {
3681                 /* add an empty QoS header if needed */
3682                 pos[0] = 0;
3683                 pos[1] = 0;
3684                 pos += 2;
3685         }
3686 #endif
3687
3688         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3689         pos += sizeof(rfc1042_header);
3690         WPA_PUT_BE16(pos, ETH_P_PAE);
3691         pos += 2;
3692         memcpy(pos, data, data_len);
3693
3694         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3695         if (res < 0) {
3696                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3697                            "failed: %d (%s)",
3698                            (unsigned long) len, errno, strerror(errno));
3699         }
3700         os_free(hdr);
3701
3702         return res;
3703 }
3704
3705
3706 static u32 sta_flags_nl80211(int flags)
3707 {
3708         u32 f = 0;
3709
3710         if (flags & WPA_STA_AUTHORIZED)
3711                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3712         if (flags & WPA_STA_WMM)
3713                 f |= BIT(NL80211_STA_FLAG_WME);
3714         if (flags & WPA_STA_SHORT_PREAMBLE)
3715                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3716         if (flags & WPA_STA_MFP)
3717                 f |= BIT(NL80211_STA_FLAG_MFP);
3718
3719         return f;
3720 }
3721
3722
3723 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3724                                             int total_flags,
3725                                             int flags_or, int flags_and)
3726 {
3727         struct i802_bss *bss = priv;
3728         struct wpa_driver_nl80211_data *drv = bss->drv;
3729         struct nl_msg *msg, *flags = NULL;
3730         struct nl80211_sta_flag_update upd;
3731
3732         msg = nlmsg_alloc();
3733         if (!msg)
3734                 return -ENOMEM;
3735
3736         flags = nlmsg_alloc();
3737         if (!flags) {
3738                 nlmsg_free(msg);
3739                 return -ENOMEM;
3740         }
3741
3742         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3743                     0, NL80211_CMD_SET_STATION, 0);
3744
3745         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3746                     if_nametoindex(bss->ifname));
3747         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3748
3749         /*
3750          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3751          * can be removed eventually.
3752          */
3753         if (total_flags & WPA_STA_AUTHORIZED)
3754                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3755
3756         if (total_flags & WPA_STA_WMM)
3757                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3758
3759         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3760                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3761
3762         if (total_flags & WPA_STA_MFP)
3763                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3764
3765         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3766                 goto nla_put_failure;
3767
3768         os_memset(&upd, 0, sizeof(upd));
3769         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3770         upd.set = sta_flags_nl80211(flags_or);
3771         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3772
3773         nlmsg_free(flags);
3774
3775         return send_and_recv_msgs(drv, msg, NULL, NULL);
3776  nla_put_failure:
3777         nlmsg_free(flags);
3778         return -ENOBUFS;
3779 }
3780
3781
3782 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3783                                  struct wpa_driver_associate_params *params)
3784 {
3785         if (params->p2p)
3786                 wpa_printf(MSG_DEBUG, "nl80211: Setup AP operations for P2P "
3787                            "group (GO)");
3788         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
3789             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3790                 nl80211_remove_monitor_interface(drv);
3791                 return -1;
3792         }
3793
3794         /* TODO: setup monitor interface (and add code somewhere to remove this
3795          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3796
3797         return 0;
3798 }
3799
3800
3801 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3802 {
3803         struct nl_msg *msg;
3804         int ret = -1;
3805
3806         msg = nlmsg_alloc();
3807         if (!msg)
3808                 return -1;
3809
3810         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3811                     NL80211_CMD_LEAVE_IBSS, 0);
3812         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3813         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3814         msg = NULL;
3815         if (ret) {
3816                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3817                            "(%s)", ret, strerror(-ret));
3818                 goto nla_put_failure;
3819         }
3820
3821         ret = 0;
3822         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3823
3824 nla_put_failure:
3825         nlmsg_free(msg);
3826         return ret;
3827 }
3828
3829
3830 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3831                                    struct wpa_driver_associate_params *params)
3832 {
3833         struct nl_msg *msg;
3834         int ret = -1;
3835         int count = 0;
3836
3837         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3838
3839         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
3840                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3841                            "IBSS mode");
3842                 return -1;
3843         }
3844
3845 retry:
3846         msg = nlmsg_alloc();
3847         if (!msg)
3848                 return -1;
3849
3850         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3851                     NL80211_CMD_JOIN_IBSS, 0);
3852         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3853
3854         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3855                 goto nla_put_failure;
3856
3857         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3858                           params->ssid, params->ssid_len);
3859         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3860                 params->ssid);
3861         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3862         drv->ssid_len = params->ssid_len;
3863
3864         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3865         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3866
3867         ret = nl80211_set_conn_keys(params, msg);
3868         if (ret)
3869                 goto nla_put_failure;
3870
3871         if (params->wpa_ie) {
3872                 wpa_hexdump(MSG_DEBUG,
3873                             "  * Extra IEs for Beacon/Probe Response frames",
3874                             params->wpa_ie, params->wpa_ie_len);
3875                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3876                         params->wpa_ie);
3877         }
3878
3879         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3880         msg = NULL;
3881         if (ret) {
3882                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3883                            ret, strerror(-ret));
3884                 count++;
3885                 if (ret == -EALREADY && count == 1) {
3886                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3887                                    "forced leave");
3888                         nl80211_leave_ibss(drv);
3889                         nlmsg_free(msg);
3890                         goto retry;
3891                 }
3892
3893                 goto nla_put_failure;
3894         }
3895         ret = 0;
3896         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3897
3898 nla_put_failure:
3899         nlmsg_free(msg);
3900         return ret;
3901 }
3902
3903
3904 static int wpa_driver_nl80211_connect(
3905         struct wpa_driver_nl80211_data *drv,
3906         struct wpa_driver_associate_params *params)
3907 {
3908         struct nl_msg *msg;
3909         enum nl80211_auth_type type;
3910         int ret = 0;
3911
3912         msg = nlmsg_alloc();
3913         if (!msg)
3914                 return -1;
3915
3916         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3917         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3918                     NL80211_CMD_CONNECT, 0);
3919
3920         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3921         if (params->bssid) {
3922                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3923                            MAC2STR(params->bssid));
3924                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3925         }
3926         if (params->freq) {
3927                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3928                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3929         }
3930         if (params->ssid) {
3931                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3932                                   params->ssid, params->ssid_len);
3933                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3934                         params->ssid);
3935                 if (params->ssid_len > sizeof(drv->ssid))
3936                         goto nla_put_failure;
3937                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3938                 drv->ssid_len = params->ssid_len;
3939         }
3940         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3941         if (params->wpa_ie)
3942                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3943                         params->wpa_ie);
3944
3945         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3946                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3947         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3948                 type = NL80211_AUTHTYPE_SHARED_KEY;
3949         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3950                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3951         else if (params->auth_alg & WPA_AUTH_ALG_FT)
3952                 type = NL80211_AUTHTYPE_FT;
3953         else
3954                 goto nla_put_failure;
3955
3956         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3957         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3958
3959         if (params->wpa_ie && params->wpa_ie_len) {
3960                 enum nl80211_wpa_versions ver;
3961
3962                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3963                         ver = NL80211_WPA_VERSION_2;
3964                 else
3965                         ver = NL80211_WPA_VERSION_1;
3966
3967                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3968                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3969         }
3970
3971         if (params->pairwise_suite != CIPHER_NONE) {
3972                 int cipher;
3973
3974                 switch (params->pairwise_suite) {
3975                 case CIPHER_WEP40:
3976                         cipher = WLAN_CIPHER_SUITE_WEP40;
3977                         break;
3978                 case CIPHER_WEP104:
3979                         cipher = WLAN_CIPHER_SUITE_WEP104;
3980                         break;
3981                 case CIPHER_CCMP:
3982                         cipher = WLAN_CIPHER_SUITE_CCMP;
3983                         break;
3984                 case CIPHER_TKIP:
3985                 default:
3986                         cipher = WLAN_CIPHER_SUITE_TKIP;
3987                         break;
3988                 }
3989                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3990         }
3991
3992         if (params->group_suite != CIPHER_NONE) {
3993                 int cipher;
3994
3995                 switch (params->group_suite) {
3996                 case CIPHER_WEP40:
3997                         cipher = WLAN_CIPHER_SUITE_WEP40;
3998                         break;
3999                 case CIPHER_WEP104:
4000                         cipher = WLAN_CIPHER_SUITE_WEP104;
4001                         break;
4002                 case CIPHER_CCMP:
4003                         cipher = WLAN_CIPHER_SUITE_CCMP;
4004                         break;
4005                 case CIPHER_TKIP:
4006                 default:
4007                         cipher = WLAN_CIPHER_SUITE_TKIP;
4008                         break;
4009                 }
4010                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
4011         }
4012
4013         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
4014             params->key_mgmt_suite == KEY_MGMT_PSK) {
4015                 int mgmt = WLAN_AKM_SUITE_PSK;
4016
4017                 switch (params->key_mgmt_suite) {
4018                 case KEY_MGMT_802_1X:
4019                         mgmt = WLAN_AKM_SUITE_8021X;
4020                         break;
4021                 case KEY_MGMT_PSK:
4022                 default:
4023                         mgmt = WLAN_AKM_SUITE_PSK;
4024                         break;
4025                 }
4026                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
4027         }
4028
4029         ret = nl80211_set_conn_keys(params, msg);
4030         if (ret)
4031                 goto nla_put_failure;
4032
4033         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4034         msg = NULL;
4035         if (ret) {
4036                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
4037                            "(%s)", ret, strerror(-ret));
4038                 goto nla_put_failure;
4039         }
4040         ret = 0;
4041         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
4042
4043 nla_put_failure:
4044         nlmsg_free(msg);
4045         return ret;
4046
4047 }
4048
4049
4050 static int wpa_driver_nl80211_associate(
4051         void *priv, struct wpa_driver_associate_params *params)
4052 {
4053         struct i802_bss *bss = priv;
4054         struct wpa_driver_nl80211_data *drv = bss->drv;
4055         int ret = -1;
4056         struct nl_msg *msg;
4057
4058         if (params->mode == IEEE80211_MODE_AP)
4059                 return wpa_driver_nl80211_ap(drv, params);
4060
4061         if (params->mode == IEEE80211_MODE_IBSS)
4062                 return wpa_driver_nl80211_ibss(drv, params);
4063
4064         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
4065                 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
4066                         return -1;
4067                 return wpa_driver_nl80211_connect(drv, params);
4068         }
4069
4070         drv->associated = 0;
4071
4072         msg = nlmsg_alloc();
4073         if (!msg)
4074                 return -1;
4075
4076         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
4077                    drv->ifindex);
4078         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4079                     NL80211_CMD_ASSOCIATE, 0);
4080
4081         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4082         if (params->bssid) {
4083                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
4084                            MAC2STR(params->bssid));
4085                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
4086         }
4087         if (params->freq) {
4088                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
4089                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
4090                 drv->assoc_freq = params->freq;
4091         } else
4092                 drv->assoc_freq = 0;
4093         if (params->ssid) {
4094                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
4095                                   params->ssid, params->ssid_len);
4096                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
4097                         params->ssid);
4098                 if (params->ssid_len > sizeof(drv->ssid))
4099                         goto nla_put_failure;
4100                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
4101                 drv->ssid_len = params->ssid_len;
4102         }
4103         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
4104         if (params->wpa_ie)
4105                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
4106                         params->wpa_ie);
4107
4108 #ifdef CONFIG_IEEE80211W
4109         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
4110                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
4111 #endif /* CONFIG_IEEE80211W */
4112
4113         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
4114
4115         if (params->prev_bssid) {
4116                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
4117                            MAC2STR(params->prev_bssid));
4118                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
4119                         params->prev_bssid);
4120         }
4121
4122         if (params->p2p)
4123                 wpa_printf(MSG_DEBUG, "  * P2P group");
4124
4125         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4126         msg = NULL;
4127         if (ret) {
4128                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
4129                            "(%s)", ret, strerror(-ret));
4130                 nl80211_dump_scan(drv);
4131                 goto nla_put_failure;
4132         }
4133         ret = 0;
4134         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
4135                    "successfully");
4136
4137 nla_put_failure:
4138         nlmsg_free(msg);
4139         return ret;
4140 }
4141
4142
4143 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
4144                             int ifindex, int mode)
4145 {
4146         struct nl_msg *msg;
4147         int ret = -ENOBUFS;
4148
4149         msg = nlmsg_alloc();
4150         if (!msg)
4151                 return -ENOMEM;
4152
4153         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4154                     0, NL80211_CMD_SET_INTERFACE, 0);
4155         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4156         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
4157
4158         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4159         if (!ret)
4160                 return 0;
4161 nla_put_failure:
4162         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
4163                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
4164         return ret;
4165 }
4166
4167
4168 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
4169 {
4170         struct i802_bss *bss = priv;
4171         struct wpa_driver_nl80211_data *drv = bss->drv;
4172         int ret = -1;
4173         int nlmode;
4174         int i;
4175
4176         switch (mode) {
4177         case 0:
4178                 nlmode = NL80211_IFTYPE_STATION;
4179                 break;
4180         case 1:
4181                 nlmode = NL80211_IFTYPE_ADHOC;
4182                 break;
4183         case 2:
4184                 nlmode = NL80211_IFTYPE_AP;
4185                 break;
4186         default:
4187                 return -1;
4188         }
4189
4190         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
4191                 drv->nlmode = nlmode;
4192                 ret = 0;
4193                 goto done;
4194         }
4195
4196         if (nlmode == drv->nlmode) {
4197                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
4198                            "requested mode - ignore error");
4199                 ret = 0;
4200                 goto done; /* Already in the requested mode */
4201         }
4202
4203         /* mac80211 doesn't allow mode changes while the device is up, so
4204          * take the device down, try to set the mode again, and bring the
4205          * device back up.
4206          */
4207         wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
4208                    "interface down");
4209         for (i = 0; i < 10; i++) {
4210                 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) ==
4211                     0) {
4212                         /* Try to set the mode again while the interface is
4213                          * down */
4214                         ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
4215                         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname,
4216                                                   1))
4217                                 ret = -1;
4218                         if (!ret)
4219                                 break;
4220                 } else
4221                         wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
4222                                    "interface down");
4223                 os_sleep(0, 100000);
4224         }
4225
4226         if (!ret) {
4227                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
4228                            "interface is down");
4229                 drv->nlmode = nlmode;
4230         }
4231
4232 done:
4233         if (!ret && nlmode == NL80211_IFTYPE_AP) {
4234                 /* Setup additional AP mode functionality if needed */
4235                 if (drv->monitor_ifidx < 0 &&
4236                     nl80211_create_monitor_interface(drv))
4237                         return -1;
4238         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
4239                 /* Remove additional AP mode functionality */
4240                 nl80211_remove_monitor_interface(drv);
4241                 bss->beacon_set = 0;
4242         }
4243
4244         if (ret)
4245                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
4246                            "from %d failed", nlmode, drv->nlmode);
4247
4248         return ret;
4249 }
4250
4251
4252 static int wpa_driver_nl80211_get_capa(void *priv,
4253                                        struct wpa_driver_capa *capa)
4254 {
4255         struct i802_bss *bss = priv;
4256         struct wpa_driver_nl80211_data *drv = bss->drv;
4257         if (!drv->has_capability)
4258                 return -1;
4259         os_memcpy(capa, &drv->capa, sizeof(*capa));
4260         return 0;
4261 }
4262
4263
4264 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
4265 {
4266         struct i802_bss *bss = priv;
4267         struct wpa_driver_nl80211_data *drv = bss->drv;
4268
4269         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
4270                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
4271         drv->operstate = state;
4272         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
4273                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
4274 }
4275
4276
4277 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
4278 {
4279         struct i802_bss *bss = priv;
4280         struct wpa_driver_nl80211_data *drv = bss->drv;
4281         struct nl_msg *msg;
4282         struct nl80211_sta_flag_update upd;
4283
4284         msg = nlmsg_alloc();
4285         if (!msg)
4286                 return -ENOMEM;
4287
4288         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4289                     0, NL80211_CMD_SET_STATION, 0);
4290
4291         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4292                     if_nametoindex(bss->ifname));
4293         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
4294
4295         os_memset(&upd, 0, sizeof(upd));
4296         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
4297         if (authorized)
4298                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
4299         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4300
4301         return send_and_recv_msgs(drv, msg, NULL, NULL);
4302  nla_put_failure:
4303         return -ENOBUFS;
4304 }
4305
4306
4307 #ifdef HOSTAPD
4308
4309 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4310 {
4311         int i;
4312         int *old;
4313
4314         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
4315                    ifidx);
4316         for (i = 0; i < drv->num_if_indices; i++) {
4317                 if (drv->if_indices[i] == 0) {
4318                         drv->if_indices[i] = ifidx;
4319                         return;
4320                 }
4321         }
4322
4323         if (drv->if_indices != drv->default_if_indices)
4324                 old = drv->if_indices;
4325         else
4326                 old = NULL;
4327
4328         drv->if_indices = os_realloc(old,
4329                                      sizeof(int) * (drv->num_if_indices + 1));
4330         if (!drv->if_indices) {
4331                 if (!old)
4332                         drv->if_indices = drv->default_if_indices;
4333                 else
4334                         drv->if_indices = old;
4335                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4336                            "interfaces");
4337                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4338                 return;
4339         } else if (!old)
4340                 os_memcpy(drv->if_indices, drv->default_if_indices,
4341                           sizeof(drv->default_if_indices));
4342         drv->if_indices[drv->num_if_indices] = ifidx;
4343         drv->num_if_indices++;
4344 }
4345
4346
4347 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4348 {
4349         int i;
4350
4351         for (i = 0; i < drv->num_if_indices; i++) {
4352                 if (drv->if_indices[i] == ifidx) {
4353                         drv->if_indices[i] = 0;
4354                         break;
4355                 }
4356         }
4357 }
4358
4359
4360 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4361 {
4362         int i;
4363
4364         for (i = 0; i < drv->num_if_indices; i++)
4365                 if (drv->if_indices[i] == ifidx)
4366                         return 1;
4367
4368         return 0;
4369 }
4370
4371
4372 static inline int min_int(int a, int b)
4373 {
4374         if (a < b)
4375                 return a;
4376         return b;
4377 }
4378
4379
4380 static int get_key_handler(struct nl_msg *msg, void *arg)
4381 {
4382         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4383         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4384
4385         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4386                   genlmsg_attrlen(gnlh, 0), NULL);
4387
4388         /*
4389          * TODO: validate the key index and mac address!
4390          * Otherwise, there's a race condition as soon as
4391          * the kernel starts sending key notifications.
4392          */
4393
4394         if (tb[NL80211_ATTR_KEY_SEQ])
4395                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4396                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4397         return NL_SKIP;
4398 }
4399
4400
4401 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4402                            int idx, u8 *seq)
4403 {
4404         struct i802_bss *bss = priv;
4405         struct wpa_driver_nl80211_data *drv = bss->drv;
4406         struct nl_msg *msg;
4407
4408         msg = nlmsg_alloc();
4409         if (!msg)
4410                 return -ENOMEM;
4411
4412         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4413                     0, NL80211_CMD_GET_KEY, 0);
4414
4415         if (addr)
4416                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4417         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4418         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4419
4420         memset(seq, 0, 6);
4421
4422         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4423  nla_put_failure:
4424         return -ENOBUFS;
4425 }
4426
4427
4428 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4429                               int mode)
4430 {
4431         struct i802_bss *bss = priv;
4432         struct wpa_driver_nl80211_data *drv = bss->drv;
4433         struct nl_msg *msg;
4434         u8 rates[NL80211_MAX_SUPP_RATES];
4435         u8 rates_len = 0;
4436         int i;
4437
4438         msg = nlmsg_alloc();
4439         if (!msg)
4440                 return -ENOMEM;
4441
4442         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4443                     NL80211_CMD_SET_BSS, 0);
4444
4445         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4446                 rates[rates_len++] = basic_rates[i] / 5;
4447
4448         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4449
4450         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4451
4452         return send_and_recv_msgs(drv, msg, NULL, NULL);
4453  nla_put_failure:
4454         return -ENOBUFS;
4455 }
4456
4457 #endif /* HOSTAPD */
4458
4459
4460 /* Set kernel driver on given frequency (MHz) */
4461 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4462 {
4463         struct i802_bss *bss = priv;
4464         struct wpa_driver_nl80211_data *drv = bss->drv;
4465         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4466                                            freq->sec_channel_offset);
4467 }
4468
4469
4470 #ifdef HOSTAPD
4471
4472 static int i802_set_rts(void *priv, int rts)
4473 {
4474         struct i802_bss *bss = priv;
4475         struct wpa_driver_nl80211_data *drv = bss->drv;
4476         struct nl_msg *msg;
4477         int ret = -ENOBUFS;
4478         u32 val;
4479
4480         msg = nlmsg_alloc();
4481         if (!msg)
4482                 return -ENOMEM;
4483
4484         if (rts >= 2347)
4485                 val = (u32) -1;
4486         else
4487                 val = rts;
4488
4489         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4490                     0, NL80211_CMD_SET_WIPHY, 0);
4491         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4492         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4493
4494         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4495         if (!ret)
4496                 return 0;
4497 nla_put_failure:
4498         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4499                    "%d (%s)", rts, ret, strerror(-ret));
4500         return ret;
4501 }
4502
4503
4504 static int i802_set_frag(void *priv, int frag)
4505 {
4506         struct i802_bss *bss = priv;
4507         struct wpa_driver_nl80211_data *drv = bss->drv;
4508         struct nl_msg *msg;
4509         int ret = -ENOBUFS;
4510         u32 val;
4511
4512         msg = nlmsg_alloc();
4513         if (!msg)
4514                 return -ENOMEM;
4515
4516         if (frag >= 2346)
4517                 val = (u32) -1;
4518         else
4519                 val = frag;
4520
4521         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4522                     0, NL80211_CMD_SET_WIPHY, 0);
4523         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4524         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4525
4526         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4527         if (!ret)
4528                 return 0;
4529 nla_put_failure:
4530         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4531                    "%d: %d (%s)", frag, ret, strerror(-ret));
4532         return ret;
4533 }
4534
4535
4536 static int i802_flush(void *priv)
4537 {
4538         struct i802_bss *bss = priv;
4539         struct wpa_driver_nl80211_data *drv = bss->drv;
4540         struct nl_msg *msg;
4541
4542         msg = nlmsg_alloc();
4543         if (!msg)
4544                 return -1;
4545
4546         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4547                     0, NL80211_CMD_DEL_STATION, 0);
4548
4549         /*
4550          * XXX: FIX! this needs to flush all VLANs too
4551          */
4552         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4553                     if_nametoindex(bss->ifname));
4554
4555         return send_and_recv_msgs(drv, msg, NULL, NULL);
4556  nla_put_failure:
4557         return -ENOBUFS;
4558 }
4559
4560
4561 static int get_sta_handler(struct nl_msg *msg, void *arg)
4562 {
4563         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4564         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4565         struct hostap_sta_driver_data *data = arg;
4566         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4567         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4568                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4569                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4570                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4571                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4572                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4573         };
4574
4575         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4576                   genlmsg_attrlen(gnlh, 0), NULL);
4577
4578         /*
4579          * TODO: validate the interface and mac address!
4580          * Otherwise, there's a race condition as soon as
4581          * the kernel starts sending station notifications.
4582          */
4583
4584         if (!tb[NL80211_ATTR_STA_INFO]) {
4585                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4586                 return NL_SKIP;
4587         }
4588         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4589                              tb[NL80211_ATTR_STA_INFO],
4590                              stats_policy)) {
4591                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4592                 return NL_SKIP;
4593         }
4594
4595         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4596                 data->inactive_msec =
4597                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4598         if (stats[NL80211_STA_INFO_RX_BYTES])
4599                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4600         if (stats[NL80211_STA_INFO_TX_BYTES])
4601                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4602         if (stats[NL80211_STA_INFO_RX_PACKETS])
4603                 data->rx_packets =
4604                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4605         if (stats[NL80211_STA_INFO_TX_PACKETS])
4606                 data->tx_packets =
4607                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4608
4609         return NL_SKIP;
4610 }
4611
4612 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4613                               const u8 *addr)
4614 {
4615         struct i802_bss *bss = priv;
4616         struct wpa_driver_nl80211_data *drv = bss->drv;
4617         struct nl_msg *msg;
4618
4619         os_memset(data, 0, sizeof(*data));
4620         msg = nlmsg_alloc();
4621         if (!msg)
4622                 return -ENOMEM;
4623
4624         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4625                     0, NL80211_CMD_GET_STATION, 0);
4626
4627         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4628         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4629
4630         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4631  nla_put_failure:
4632         return -ENOBUFS;
4633 }
4634
4635
4636 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4637                                     int cw_min, int cw_max, int burst_time)
4638 {
4639         struct i802_bss *bss = priv;
4640         struct wpa_driver_nl80211_data *drv = bss->drv;
4641         struct nl_msg *msg;
4642         struct nlattr *txq, *params;
4643
4644         msg = nlmsg_alloc();
4645         if (!msg)
4646                 return -1;
4647
4648         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4649                     0, NL80211_CMD_SET_WIPHY, 0);
4650
4651         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4652
4653         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4654         if (!txq)
4655                 goto nla_put_failure;
4656
4657         /* We are only sending parameters for a single TXQ at a time */
4658         params = nla_nest_start(msg, 1);
4659         if (!params)
4660                 goto nla_put_failure;
4661
4662         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4663         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4664          * 32 usec, so need to convert the value here. */
4665         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4666         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4667         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4668         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4669
4670         nla_nest_end(msg, params);
4671
4672         nla_nest_end(msg, txq);
4673
4674         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4675                 return 0;
4676  nla_put_failure:
4677         return -1;
4678 }
4679
4680
4681 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4682 {
4683         struct i802_bss *bss = priv;
4684         struct wpa_driver_nl80211_data *drv = bss->drv;
4685         struct nl_msg *msg;
4686
4687         msg = nlmsg_alloc();
4688         if (!msg)
4689                 return -ENOMEM;
4690
4691         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4692                     NL80211_CMD_SET_BSS, 0);
4693
4694         if (cts >= 0)
4695                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4696         if (preamble >= 0)
4697                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4698         if (slot >= 0)
4699                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4700
4701         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4702
4703         return send_and_recv_msgs(drv, msg, NULL, NULL);
4704  nla_put_failure:
4705         return -ENOBUFS;
4706 }
4707
4708
4709 static int i802_set_cts_protect(void *priv, int value)
4710 {
4711         return i802_set_bss(priv, value, -1, -1);
4712 }
4713
4714
4715 static int i802_set_preamble(void *priv, int value)
4716 {
4717         return i802_set_bss(priv, -1, value, -1);
4718 }
4719
4720
4721 static int i802_set_short_slot_time(void *priv, int value)
4722 {
4723         return i802_set_bss(priv, -1, -1, value);
4724 }
4725
4726
4727 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4728                              const char *ifname, int vlan_id)
4729 {
4730         struct i802_bss *bss = priv;
4731         struct wpa_driver_nl80211_data *drv = bss->drv;
4732         struct nl_msg *msg;
4733         int ret = -ENOBUFS;
4734
4735         msg = nlmsg_alloc();
4736         if (!msg)
4737                 return -ENOMEM;
4738
4739         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4740                     0, NL80211_CMD_SET_STATION, 0);
4741
4742         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4743                     if_nametoindex(bss->ifname));
4744         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4745         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4746                     if_nametoindex(ifname));
4747
4748         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4749         if (ret < 0) {
4750                 wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
4751                            MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
4752                            MAC2STR(addr), ifname, vlan_id, ret,
4753                            strerror(-ret));
4754         }
4755  nla_put_failure:
4756         return ret;
4757 }
4758
4759
4760 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4761 {
4762         struct i802_bss *bss = priv;
4763         struct wpa_driver_nl80211_data *drv = bss->drv;
4764         char name[IFNAMSIZ + 1];
4765
4766         os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
4767         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4768                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4769         if (val) {
4770                 if (nl80211_create_iface(drv, name, NL80211_IFTYPE_AP_VLAN,
4771                                          NULL, 1) < 0)
4772                         return -1;
4773                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4774                 return i802_set_sta_vlan(priv, addr, name, 0);
4775         } else {
4776                 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
4777                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4778                                                     name);
4779         }
4780 }
4781
4782
4783 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4784 {
4785         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4786         struct sockaddr_ll lladdr;
4787         unsigned char buf[3000];
4788         int len;
4789         socklen_t fromlen = sizeof(lladdr);
4790
4791         len = recvfrom(sock, buf, sizeof(buf), 0,
4792                        (struct sockaddr *)&lladdr, &fromlen);
4793         if (len < 0) {
4794                 perror("recv");
4795                 return;
4796         }
4797
4798         if (have_ifidx(drv, lladdr.sll_ifindex))
4799                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4800 }
4801
4802
4803 static int i802_get_inact_sec(void *priv, const u8 *addr)
4804 {
4805         struct hostap_sta_driver_data data;
4806         int ret;
4807
4808         data.inactive_msec = (unsigned long) -1;
4809         ret = i802_read_sta_data(priv, &data, addr);
4810         if (ret || data.inactive_msec == (unsigned long) -1)
4811                 return -1;
4812         return data.inactive_msec / 1000;
4813 }
4814
4815
4816 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4817 {
4818 #if 0
4819         /* TODO */
4820 #endif
4821         return 0;
4822 }
4823
4824
4825 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4826                            int reason)
4827 {
4828         struct i802_bss *bss = priv;
4829         struct ieee80211_mgmt mgmt;
4830
4831         memset(&mgmt, 0, sizeof(mgmt));
4832         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4833                                           WLAN_FC_STYPE_DEAUTH);
4834         memcpy(mgmt.da, addr, ETH_ALEN);
4835         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4836         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4837         mgmt.u.deauth.reason_code = host_to_le16(reason);
4838         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4839                                             IEEE80211_HDRLEN +
4840                                             sizeof(mgmt.u.deauth));
4841 }
4842
4843
4844 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4845                              int reason)
4846 {
4847         struct i802_bss *bss = priv;
4848         struct ieee80211_mgmt mgmt;
4849
4850         memset(&mgmt, 0, sizeof(mgmt));
4851         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4852                                           WLAN_FC_STYPE_DISASSOC);
4853         memcpy(mgmt.da, addr, ETH_ALEN);
4854         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4855         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4856         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4857         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4858                                             IEEE80211_HDRLEN +
4859                                             sizeof(mgmt.u.disassoc));
4860 }
4861
4862
4863 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4864                              const char *brname, const char *ifname)
4865 {
4866         int ifindex;
4867         char in_br[IFNAMSIZ];
4868
4869         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4870         ifindex = if_nametoindex(brname);
4871         if (ifindex == 0) {
4872                 /*
4873                  * Bridge was configured, but the bridge device does
4874                  * not exist. Try to add it now.
4875                  */
4876                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4877                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4878                                    "bridge interface %s: %s",
4879                                    brname, strerror(errno));
4880                         return -1;
4881                 }
4882                 drv->added_bridge = 1;
4883                 add_ifidx(drv, if_nametoindex(brname));
4884         }
4885
4886         if (linux_br_get(in_br, ifname) == 0) {
4887                 if (os_strcmp(in_br, brname) == 0)
4888                         return 0; /* already in the bridge */
4889
4890                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4891                            "bridge %s", ifname, in_br);
4892                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4893                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4894                                    "remove interface %s from bridge "
4895                                    "%s: %s",
4896                                    ifname, brname, strerror(errno));
4897                         return -1;
4898                 }
4899         }
4900
4901         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4902                    ifname, brname);
4903         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4904                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4905                            "into bridge %s: %s",
4906                            ifname, brname, strerror(errno));
4907                 return -1;
4908         }
4909         drv->added_if_into_bridge = 1;
4910
4911         return 0;
4912 }
4913
4914
4915 static void *i802_init(struct hostapd_data *hapd,
4916                        struct wpa_init_params *params)
4917 {
4918         struct wpa_driver_nl80211_data *drv;
4919         struct i802_bss *bss;
4920         size_t i;
4921         char brname[IFNAMSIZ];
4922         int ifindex, br_ifindex;
4923         int br_added = 0;
4924
4925         bss = wpa_driver_nl80211_init(hapd, params->ifname);
4926         if (bss == NULL)
4927                 return NULL;
4928
4929         drv = bss->drv;
4930         if (linux_br_get(brname, params->ifname) == 0) {
4931                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4932                            params->ifname, brname);
4933                 br_ifindex = if_nametoindex(brname);
4934         } else {
4935                 brname[0] = '\0';
4936                 br_ifindex = 0;
4937         }
4938
4939         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4940         drv->if_indices = drv->default_if_indices;
4941         for (i = 0; i < params->num_bridge; i++) {
4942                 if (params->bridge[i]) {
4943                         ifindex = if_nametoindex(params->bridge[i]);
4944                         if (ifindex)
4945                                 add_ifidx(drv, ifindex);
4946                         if (ifindex == br_ifindex)
4947                                 br_added = 1;
4948                 }
4949         }
4950         if (!br_added && br_ifindex &&
4951             (params->num_bridge == 0 || !params->bridge[0]))
4952                 add_ifidx(drv, br_ifindex);
4953
4954         /* start listening for EAPOL on the default AP interface */
4955         add_ifidx(drv, drv->ifindex);
4956
4957         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
4958                 goto failed;
4959
4960         if (params->bssid) {
4961                 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
4962                                        params->bssid))
4963                         goto failed;
4964         }
4965
4966         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
4967                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4968                            "into AP mode", bss->ifname);
4969                 goto failed;
4970         }
4971
4972         if (params->num_bridge && params->bridge[0] &&
4973             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
4974                 goto failed;
4975
4976         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
4977                 goto failed;
4978
4979         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4980         if (drv->eapol_sock < 0) {
4981                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4982                 goto failed;
4983         }
4984
4985         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4986         {
4987                 printf("Could not register read socket for eapol\n");
4988                 goto failed;
4989         }
4990
4991         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
4992                 goto failed;
4993
4994         return bss;
4995
4996 failed:
4997         nl80211_remove_monitor_interface(drv);
4998         if (drv->ioctl_sock >= 0)
4999                 close(drv->ioctl_sock);
5000
5001         genl_family_put(drv->nl80211);
5002         nl_cache_free(drv->nl_cache);
5003         nl_handle_destroy(drv->nl_handle);
5004         nl_cb_put(drv->nl_cb);
5005
5006         os_free(drv);
5007         return NULL;
5008 }
5009
5010
5011 static void i802_deinit(void *priv)
5012 {
5013         wpa_driver_nl80211_deinit(priv);
5014 }
5015
5016 #endif /* HOSTAPD */
5017
5018
5019 static enum nl80211_iftype wpa_driver_nl80211_if_type(
5020         enum wpa_driver_if_type type)
5021 {
5022         switch (type) {
5023         case WPA_IF_STATION:
5024         case WPA_IF_P2P_CLIENT:
5025         case WPA_IF_P2P_GROUP:
5026                 return NL80211_IFTYPE_STATION;
5027         case WPA_IF_AP_VLAN:
5028                 return NL80211_IFTYPE_AP_VLAN;
5029         case WPA_IF_AP_BSS:
5030         case WPA_IF_P2P_GO:
5031                 return NL80211_IFTYPE_AP;
5032         }
5033         return -1;
5034 }
5035
5036
5037 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
5038                                      const char *ifname, const u8 *addr,
5039                                      void *bss_ctx, void **drv_priv,
5040                                      char *force_ifname, u8 *if_addr)
5041 {
5042         struct i802_bss *bss = priv;
5043         struct wpa_driver_nl80211_data *drv = bss->drv;
5044         int ifidx;
5045 #ifdef HOSTAPD
5046         struct i802_bss *new_bss = NULL;
5047
5048         if (type == WPA_IF_AP_BSS) {
5049                 new_bss = os_zalloc(sizeof(*new_bss));
5050                 if (new_bss == NULL)
5051                         return -1;
5052         }
5053 #endif /* HOSTAPD */
5054
5055         if (addr)
5056                 os_memcpy(if_addr, addr, ETH_ALEN);
5057         ifidx = nl80211_create_iface(drv, ifname,
5058                                      wpa_driver_nl80211_if_type(type), addr,
5059                                      0);
5060         if (ifidx < 0) {
5061 #ifdef HOSTAPD
5062                 os_free(new_bss);
5063 #endif /* HOSTAPD */
5064                 return -1;
5065         }
5066
5067         if (!addr &&
5068             linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0)
5069                 return -1;
5070
5071 #ifdef HOSTAPD
5072         if (type == WPA_IF_AP_BSS) {
5073                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
5074                         nl80211_remove_iface(drv, ifidx);
5075                         os_free(new_bss);
5076                         return -1;
5077                 }
5078                 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
5079                 new_bss->ifindex = ifidx;
5080                 new_bss->drv = drv;
5081                 new_bss->next = drv->first_bss.next;
5082                 drv->first_bss.next = new_bss;
5083                 if (drv_priv)
5084                         *drv_priv = new_bss;
5085         }
5086 #endif /* HOSTAPD */
5087
5088         return 0;
5089 }
5090
5091
5092 static int wpa_driver_nl80211_if_remove(void *priv,
5093                                         enum wpa_driver_if_type type,
5094                                         const char *ifname)
5095 {
5096         struct i802_bss *bss = priv;
5097         struct wpa_driver_nl80211_data *drv = bss->drv;
5098         int ifindex = if_nametoindex(ifname);
5099
5100         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
5101                    __func__, type, ifname, ifindex);
5102         if (ifindex <= 0)
5103                 return -1;
5104         nl80211_remove_iface(drv, ifindex);
5105
5106 #ifdef HOSTAPD
5107         if (type != WPA_IF_AP_BSS)
5108                 return 0;
5109
5110         if (bss != &drv->first_bss) {
5111                 struct i802_bss *tbss = &drv->first_bss;
5112
5113                 while (tbss) {
5114                         if (tbss->next != bss)
5115                                 continue;
5116
5117                         tbss->next = bss->next;
5118                         os_free(bss);
5119                         break;
5120                 }
5121         }
5122 #endif /* HOSTAPD */
5123
5124         return 0;
5125 }
5126
5127
5128 static int cookie_handler(struct nl_msg *msg, void *arg)
5129 {
5130         struct nlattr *tb[NL80211_ATTR_MAX + 1];
5131         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5132         u64 *cookie = arg;
5133         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
5134                   genlmsg_attrlen(gnlh, 0), NULL);
5135         if (tb[NL80211_ATTR_COOKIE])
5136                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
5137         return NL_SKIP;
5138 }
5139
5140
5141 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
5142                                           const u8 *dst, const u8 *src,
5143                                           const u8 *bssid,
5144                                           const u8 *data, size_t data_len)
5145 {
5146         struct i802_bss *bss = priv;
5147         struct wpa_driver_nl80211_data *drv = bss->drv;
5148         int ret = -1;
5149         struct nl_msg *msg;
5150         u8 *buf;
5151         struct ieee80211_hdr *hdr;
5152         u64 cookie;
5153
5154         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
5155                    drv->ifindex);
5156
5157         buf = os_zalloc(24 + data_len);
5158         if (buf == NULL)
5159                 return ret;
5160         os_memcpy(buf + 24, data, data_len);
5161         hdr = (struct ieee80211_hdr *) buf;
5162         hdr->frame_control =
5163                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
5164         os_memcpy(hdr->addr1, dst, ETH_ALEN);
5165         os_memcpy(hdr->addr2, src, ETH_ALEN);
5166         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
5167
5168         if (drv->nlmode == NL80211_IFTYPE_AP) {
5169                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
5170                 os_free(buf);
5171                 return ret;
5172         }
5173
5174         msg = nlmsg_alloc();
5175         if (!msg) {
5176                 os_free(buf);
5177                 return -1;
5178         }
5179
5180         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5181                     NL80211_CMD_ACTION, 0);
5182
5183         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5184         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5185         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
5186         os_free(buf);
5187         buf = NULL;
5188
5189         cookie = 0;
5190         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5191         msg = NULL;
5192         if (ret) {
5193                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
5194                            "(%s)", ret, strerror(-ret));
5195                 goto nla_put_failure;
5196         }
5197         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
5198                    "cookie 0x%llx", (long long unsigned int) cookie);
5199         drv->send_action_cookie = cookie;
5200         ret = 0;
5201
5202 nla_put_failure:
5203         os_free(buf);
5204         nlmsg_free(msg);
5205         return ret;
5206 }
5207
5208
5209 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
5210                                                 unsigned int duration)
5211 {
5212         struct i802_bss *bss = priv;
5213         struct wpa_driver_nl80211_data *drv = bss->drv;
5214         struct nl_msg *msg;
5215         int ret;
5216         u64 cookie;
5217
5218         msg = nlmsg_alloc();
5219         if (!msg)
5220                 return -1;
5221
5222         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5223                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
5224
5225         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5226         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5227         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5228
5229         cookie = 0;
5230         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5231         if (ret == 0) {
5232                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
5233                            "0x%llx for freq=%u MHz duration=%u",
5234                            (long long unsigned int) cookie, freq, duration);
5235                 drv->remain_on_chan_cookie = cookie;
5236                 return 0;
5237         }
5238         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
5239                    "(freq=%d duration=%u): %d (%s)",
5240                    freq, duration, ret, strerror(-ret));
5241 nla_put_failure:
5242         return -1;
5243 }
5244
5245
5246 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
5247 {
5248         struct i802_bss *bss = priv;
5249         struct wpa_driver_nl80211_data *drv = bss->drv;
5250         struct nl_msg *msg;
5251         int ret;
5252
5253         if (!drv->pending_remain_on_chan) {
5254                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
5255                            "to cancel");
5256                 return -1;
5257         }
5258
5259         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
5260                    "0x%llx",
5261                    (long long unsigned int) drv->remain_on_chan_cookie);
5262
5263         msg = nlmsg_alloc();
5264         if (!msg)
5265                 return -1;
5266
5267         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5268                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
5269
5270         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5271         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
5272
5273         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5274         if (ret == 0)
5275                 return 0;
5276         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
5277                    "%d (%s)", ret, strerror(-ret));
5278 nla_put_failure:
5279         return -1;
5280 }
5281
5282
5283 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
5284                                                         void *timeout_ctx)
5285 {
5286         struct wpa_driver_nl80211_data *drv = eloop_ctx;
5287         if (drv->monitor_ifidx < 0)
5288                 return; /* monitor interface already removed */
5289
5290         if (drv->nlmode != NL80211_IFTYPE_STATION)
5291                 return; /* not in station mode anymore */
5292
5293         if (drv->probe_req_report)
5294                 return; /* reporting enabled */
5295
5296         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
5297                    "Probe Request reporting needed anymore");
5298         nl80211_remove_monitor_interface(drv);
5299 }
5300
5301
5302 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
5303 {
5304         struct i802_bss *bss = priv;
5305         struct wpa_driver_nl80211_data *drv = bss->drv;
5306
5307         if (drv->nlmode != NL80211_IFTYPE_STATION) {
5308                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
5309                            "allowed in station mode (iftype=%d)",
5310                            drv->nlmode);
5311                 return -1;
5312         }
5313         drv->probe_req_report = report;
5314
5315         if (report) {
5316                 eloop_cancel_timeout(
5317                         wpa_driver_nl80211_probe_req_report_timeout,
5318                         drv, NULL);
5319                 if (drv->monitor_ifidx < 0 &&
5320                     nl80211_create_monitor_interface(drv))
5321                         return -1;
5322         } else {
5323                 /*
5324                  * It takes a while to remove the monitor interface, so try to
5325                  * avoid doing this if it is needed again shortly. Instead,
5326                  * schedule the interface to be removed later if no need for it
5327                  * is seen.
5328                  */
5329                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
5330                            "to be removed after 10 seconds of no use");
5331                 eloop_register_timeout(
5332                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
5333                         drv, NULL);
5334         }
5335
5336         return 0;
5337 }
5338
5339
5340 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5341                                      int ifindex, int disabled)
5342 {
5343         struct nl_msg *msg;
5344         struct nlattr *bands, *band;
5345         int ret;
5346
5347         msg = nlmsg_alloc();
5348         if (!msg)
5349                 return -1;
5350
5351         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5352                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5353         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5354
5355         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5356         if (!bands)
5357                 goto nla_put_failure;
5358
5359         /*
5360          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5361          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5362          * rates. All 5 GHz rates are left enabled.
5363          */
5364         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5365         if (!band)
5366                 goto nla_put_failure;
5367         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5368                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5369         nla_nest_end(msg, band);
5370
5371         nla_nest_end(msg, bands);
5372
5373         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5374         msg = NULL;
5375         if (ret) {
5376                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5377                            "(%s)", ret, strerror(-ret));
5378         }
5379
5380         return ret;
5381
5382 nla_put_failure:
5383         nlmsg_free(msg);
5384         return -1;
5385 }
5386
5387
5388 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5389 {
5390         struct i802_bss *bss = priv;
5391         struct wpa_driver_nl80211_data *drv = bss->drv;
5392         drv->disable_11b_rates = disabled;
5393         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5394 }
5395
5396
5397 static int wpa_driver_nl80211_deinit_ap(void *priv)
5398 {
5399         struct i802_bss *bss = priv;
5400         struct wpa_driver_nl80211_data *drv = bss->drv;
5401         if (drv->nlmode != NL80211_IFTYPE_AP)
5402                 return -1;
5403         wpa_driver_nl80211_del_beacon(drv);
5404         return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
5405 }
5406
5407
5408 static void wpa_driver_nl80211_resume(void *priv)
5409 {
5410         struct i802_bss *bss = priv;
5411         struct wpa_driver_nl80211_data *drv = bss->drv;
5412         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
5413                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5414                            "resume event");
5415         }
5416 }
5417
5418
5419 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
5420                                   const u8 *ies, size_t ies_len)
5421 {
5422         struct i802_bss *bss = priv;
5423         struct wpa_driver_nl80211_data *drv = bss->drv;
5424         int ret;
5425         u8 *data, *pos;
5426         size_t data_len;
5427         u8 own_addr[ETH_ALEN];
5428
5429         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
5430                 return -1;
5431
5432         if (action != 1) {
5433                 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
5434                            "action %d", action);
5435                 return -1;
5436         }
5437
5438         /*
5439          * Action frame payload:
5440          * Category[1] = 6 (Fast BSS Transition)
5441          * Action[1] = 1 (Fast BSS Transition Request)
5442          * STA Address
5443          * Target AP Address
5444          * FT IEs
5445          */
5446
5447         data_len = 2 + 2 * ETH_ALEN + ies_len;
5448         data = os_malloc(data_len);
5449         if (data == NULL)
5450                 return -1;
5451         pos = data;
5452         *pos++ = 0x06; /* FT Action category */
5453         *pos++ = action;
5454         os_memcpy(pos, own_addr, ETH_ALEN);
5455         pos += ETH_ALEN;
5456         os_memcpy(pos, target_ap, ETH_ALEN);
5457         pos += ETH_ALEN;
5458         os_memcpy(pos, ies, ies_len);
5459
5460         ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
5461                                              own_addr, drv->bssid,
5462                                              data, data_len);
5463         os_free(data);
5464
5465         return ret;
5466 }
5467
5468
5469 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
5470 {
5471         struct i802_bss *bss = priv;
5472         struct wpa_driver_nl80211_data *drv = bss->drv;
5473         struct nl_msg *msg, *cqm = NULL;
5474
5475         wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
5476                    "hysteresis=%d", threshold, hysteresis);
5477
5478         msg = nlmsg_alloc();
5479         if (!msg)
5480                 return -1;
5481
5482         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5483                     0, NL80211_CMD_SET_CQM, 0);
5484
5485         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
5486
5487         cqm = nlmsg_alloc();
5488         if (cqm == NULL)
5489                 return -1;
5490
5491         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
5492         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
5493         nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
5494
5495         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
5496                 return 0;
5497         msg = NULL;
5498
5499 nla_put_failure:
5500         if (cqm)
5501                 nlmsg_free(cqm);
5502         nlmsg_free(msg);
5503         return -1;
5504 }
5505
5506
5507 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
5508                               int encrypt)
5509 {
5510         struct i802_bss *bss = priv;
5511         struct wpa_driver_nl80211_data *drv = bss->drv;
5512         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
5513 }
5514
5515
5516 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5517         .name = "nl80211",
5518         .desc = "Linux nl80211/cfg80211",
5519         .get_bssid = wpa_driver_nl80211_get_bssid,
5520         .get_ssid = wpa_driver_nl80211_get_ssid,
5521         .set_key = wpa_driver_nl80211_set_key,
5522         .scan2 = wpa_driver_nl80211_scan,
5523         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5524         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5525         .disassociate = wpa_driver_nl80211_disassociate,
5526         .authenticate = wpa_driver_nl80211_authenticate,
5527         .associate = wpa_driver_nl80211_associate,
5528         .init = wpa_driver_nl80211_init,
5529         .deinit = wpa_driver_nl80211_deinit,
5530         .get_capa = wpa_driver_nl80211_get_capa,
5531         .set_operstate = wpa_driver_nl80211_set_operstate,
5532         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5533         .set_country = wpa_driver_nl80211_set_country,
5534         .set_beacon = wpa_driver_nl80211_set_beacon,
5535         .if_add = wpa_driver_nl80211_if_add,
5536         .if_remove = wpa_driver_nl80211_if_remove,
5537         .send_mlme = wpa_driver_nl80211_send_mlme,
5538         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5539         .sta_add = wpa_driver_nl80211_sta_add,
5540         .sta_remove = wpa_driver_nl80211_sta_remove,
5541         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5542         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5543 #ifdef HOSTAPD
5544         .hapd_init = i802_init,
5545         .hapd_deinit = i802_deinit,
5546         .get_seqnum = i802_get_seqnum,
5547         .flush = i802_flush,
5548         .read_sta_data = i802_read_sta_data,
5549         .sta_deauth = i802_sta_deauth,
5550         .sta_disassoc = i802_sta_disassoc,
5551         .get_inact_sec = i802_get_inact_sec,
5552         .sta_clear_stats = i802_sta_clear_stats,
5553         .set_rts = i802_set_rts,
5554         .set_frag = i802_set_frag,
5555         .set_rate_sets = i802_set_rate_sets,
5556         .set_cts_protect = i802_set_cts_protect,
5557         .set_preamble = i802_set_preamble,
5558         .set_short_slot_time = i802_set_short_slot_time,
5559         .set_tx_queue_params = i802_set_tx_queue_params,
5560         .set_sta_vlan = i802_set_sta_vlan,
5561         .set_wds_sta = i802_set_wds_sta,
5562 #endif /* HOSTAPD */
5563         .set_freq = i802_set_freq,
5564         .send_action = wpa_driver_nl80211_send_action,
5565         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5566         .cancel_remain_on_channel =
5567         wpa_driver_nl80211_cancel_remain_on_channel,
5568         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5569         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5570         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5571         .resume = wpa_driver_nl80211_resume,
5572         .send_ft_action = nl80211_send_ft_action,
5573         .signal_monitor = nl80211_signal_monitor,
5574         .send_frame = nl80211_send_frame,
5575 };