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