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 <linux/rtnetlink.h>
  26 #include <netpacket/packet.h>
  27 #include <linux/filter.h>
  28 #include "nl80211_copy.h"
  29
  30 #include "common.h"
  31 #include "eloop.h"
  32 #include "common/ieee802_11_defs.h"
  33 #include "netlink.h"
  34 #include "linux_ioctl.h"
  35 #include "radiotap.h"
  36 #include "radiotap_iter.h"
  37 #include "rfkill.h"
  38 #include "driver.h"
  39
  40 #ifdef CONFIG_LIBNL20
  41 /* libnl 2.0 compatibility code */
  42 #define nl_handle nl_sock
  43 #define nl_handle_alloc_cb nl_socket_alloc_cb
  44 #define nl_handle_destroy nl_socket_free
  45 #endif /* CONFIG_LIBNL20 */
  46
  47
  48 #ifndef IFF_LOWER_UP
  49 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  50 #endif
  51 #ifndef IFF_DORMANT
  52 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  53 #endif
  54
  55 #ifndef IF_OPER_DORMANT
  56 #define IF_OPER_DORMANT 5
  57 #endif
  58 #ifndef IF_OPER_UP
  59 #define IF_OPER_UP 6
  60 #endif
  61
  62 struct i802_bss {
  63         struct wpa_driver_nl80211_data *drv;
  64         struct i802_bss *next;
  65         int ifindex;
  66         char ifname[IFNAMSIZ + 1];
  67         unsigned int beacon_set:1;
  68 };
  69
  70 struct wpa_driver_nl80211_data {
  71         void *ctx;
  72         struct netlink_data *netlink;
  73         int ioctl_sock; /* socket for ioctl() use */
  74         char brname[IFNAMSIZ];
  75         int ifindex;
  76         int if_removed;
  77         int if_disabled;
  78         struct rfkill_data *rfkill;
  79         struct wpa_driver_capa capa;
  80         int has_capability;
  81
  82         int operstate;
  83
  84         int scan_complete_events;
  85
  86         struct nl_handle *nl_handle;
  87         struct nl_handle *nl_handle_event;
  88         struct nl_cache *nl_cache;
  89         struct nl_cache *nl_cache_event;
  90         struct nl_cb *nl_cb;
  91         struct genl_family *nl80211;
  92
  93         u8 auth_bssid[ETH_ALEN];
  94         u8 bssid[ETH_ALEN];
  95         int associated;
  96         u8 ssid[32];
  97         size_t ssid_len;
  98         int nlmode;
  99         int ap_scan_as_station;
 100         unsigned int assoc_freq;
 101
 102         int monitor_sock;
 103         int monitor_ifidx;
 104         int probe_req_report;
 105         int disable_11b_rates;
 106
 107         unsigned int pending_remain_on_chan:1;
 108         unsigned int added_bridge:1;
 109         unsigned int added_if_into_bridge:1;
 110
 111         u64 remain_on_chan_cookie;
 112         u64 send_action_cookie;
 113
 114         struct wpa_driver_scan_filter *filter_ssids;
 115         size_t num_filter_ssids;
 116
 117         struct i802_bss first_bss;
 118
 119 #ifdef HOSTAPD
 120         int eapol_sock; /* socket for EAPOL frames */
 121
 122         int default_if_indices[16];
 123         int *if_indices;
 124         int num_if_indices;
 125
 126         int last_freq;
 127         int last_freq_ht;
 128 #endif /* HOSTAPD */
 129 };
 130
 131
 132 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 133                                             void *timeout_ctx);
 134 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 135 static int
 136 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 137 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 138                                    const u8 *addr, int cmd, u16 reason_code,
 139                                    int local_state_change);
 140 static void nl80211_remove_monitor_interface(
 141         struct wpa_driver_nl80211_data *drv);
 142
 143 #ifdef HOSTAPD
 144 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 145 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 146 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 147 static int wpa_driver_nl80211_if_remove(void *priv,
 148                                         enum wpa_driver_if_type type,
 149                                         const char *ifname);
 150 #else /* HOSTAPD */
 151 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
 152 {
 153         return 0;
 154 }
 155 #endif /* HOSTAPD */
 156
 157 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 158 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
 159                                                         void *timeout_ctx);
 160 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
 161                                      int ifindex, int disabled);
 162
 163
 164 /* nl80211 code */
 165 static int ack_handler(struct nl_msg *msg, void *arg)
 166 {
 167         int *err = arg;
 168         *err = 0;
 169         return NL_STOP;
 170 }
 171
 172 static int finish_handler(struct nl_msg *msg, void *arg)
 173 {
 174         int *ret = arg;
 175         *ret = 0;
 176         return NL_SKIP;
 177 }
 178
 179 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 180                          void *arg)
 181 {
 182         int *ret = arg;
 183         *ret = err->error;
 184         return NL_SKIP;
 185 }
 186
 187
 188 static int no_seq_check(struct nl_msg *msg, void *arg)
 189 {
 190         return NL_OK;
 191 }
 192
 193
 194 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
 195                          struct nl_handle *nl_handle, struct nl_msg *msg,
 196                          int (*valid_handler)(struct nl_msg *, void *),
 197                          void *valid_data)
 198 {
 199         struct nl_cb *cb;
 200         int err = -ENOMEM;
 201
 202         cb = nl_cb_clone(drv->nl_cb);
 203         if (!cb)
 204                 goto out;
 205
 206         err = nl_send_auto_complete(nl_handle, msg);
 207         if (err < 0)
 208                 goto out;
 209
 210         err = 1;
 211
 212         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 213         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 214         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 215
 216         if (valid_handler)
 217                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 218                           valid_handler, valid_data);
 219
 220         while (err > 0)
 221                 nl_recvmsgs(nl_handle, cb);
 222  out:
 223         nl_cb_put(cb);
 224         nlmsg_free(msg);
 225         return err;
 226 }
 227
 228
 229 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 230                               struct nl_msg *msg,
 231                               int (*valid_handler)(struct nl_msg *, void *),
 232                               void *valid_data)
 233 {
 234         return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
 235                              valid_data);
 236 }
 237
 238
 239 struct family_data {
 240         const char *group;
 241         int id;
 242 };
 243
 244
 245 static int family_handler(struct nl_msg *msg, void *arg)
 246 {
 247         struct family_data *res = arg;
 248         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 249         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 250         struct nlattr *mcgrp;
 251         int i;
 252
 253         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 254                   genlmsg_attrlen(gnlh, 0), NULL);
 255         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 256                 return NL_SKIP;
 257
 258         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 259                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 260                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 261                           nla_len(mcgrp), NULL);
 262                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 263                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 264                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 265                                res->group,
 266                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 267                         continue;
 268                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 269                 break;
 270         };
 271
 272         return NL_SKIP;
 273 }
 274
 275
 276 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 277                                const char *family, const char *group)
 278 {
 279         struct nl_msg *msg;
 280         int ret = -1;
 281         struct family_data res = { group, -ENOENT };
 282
 283         msg = nlmsg_alloc();
 284         if (!msg)
 285                 return -ENOMEM;
 286         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 287                     0, 0, CTRL_CMD_GETFAMILY, 0);
 288         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 289
 290         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 291         msg = NULL;
 292         if (ret == 0)
 293                 ret = res.id;
 294
 295 nla_put_failure:
 296         nlmsg_free(msg);
 297         return ret;
 298 }
 299
 300
 301 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 302 {
 303         struct i802_bss *bss = priv;
 304         struct wpa_driver_nl80211_data *drv = bss->drv;
 305         if (!drv->associated)
 306                 return -1;
 307         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 308         return 0;
 309 }
 310
 311
 312 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 313 {
 314         struct i802_bss *bss = priv;
 315         struct wpa_driver_nl80211_data *drv = bss->drv;
 316         if (!drv->associated)
 317                 return -1;
 318         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 319         return drv->ssid_len;
 320 }
 321
 322
 323 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 324                                           char *buf, size_t len, int del)
 325 {
 326         union wpa_event_data event;
 327
 328         os_memset(&event, 0, sizeof(event));
 329         if (len > sizeof(event.interface_status.ifname))
 330                 len = sizeof(event.interface_status.ifname) - 1;
 331         os_memcpy(event.interface_status.ifname, buf, len);
 332         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 333                 EVENT_INTERFACE_ADDED;
 334
 335         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 336                    del ? "DEL" : "NEW",
 337                    event.interface_status.ifname,
 338                    del ? "removed" : "added");
 339
 340         if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
 341                 if (del)
 342                         drv->if_removed = 1;
 343                 else
 344                         drv->if_removed = 0;
 345         }
 346
 347         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 348 }
 349
 350
 351 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 352                                          u8 *buf, size_t len)
 353 {
 354         int attrlen, rta_len;
 355         struct rtattr *attr;
 356
 357         attrlen = len;
 358         attr = (struct rtattr *) buf;
 359
 360         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 361         while (RTA_OK(attr, attrlen)) {
 362                 if (attr->rta_type == IFLA_IFNAME) {
 363                         if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
 364                             == 0)
 365                                 return 1;
 366                         else
 367                                 break;
 368                 }
 369                 attr = RTA_NEXT(attr, attrlen);
 370         }
 371
 372         return 0;
 373 }
 374
 375
 376 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 377                                           int ifindex, u8 *buf, size_t len)
 378 {
 379         if (drv->ifindex == ifindex)
 380                 return 1;
 381
 382         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 383                 drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
 384                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 385                            "interface");
 386                 wpa_driver_nl80211_finish_drv_init(drv);
 387                 return 1;
 388         }
 389
 390         return 0;
 391 }
 392
 393
 394 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 395                                                  struct ifinfomsg *ifi,
 396                                                  u8 *buf, size_t len)
 397 {
 398         struct wpa_driver_nl80211_data *drv = ctx;
 399         int attrlen, rta_len;
 400         struct rtattr *attr;
 401         u32 brid = 0;
 402
 403         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len) &&
 404             !have_ifidx(drv, ifi->ifi_index)) {
 405                 wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
 406                            "ifindex %d", ifi->ifi_index);
 407                 return;
 408         }
 409
 410         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 411                    "(%s%s%s%s)",
 412                    drv->operstate, ifi->ifi_flags,
 413                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 414                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 415                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 416                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 417
 418         if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
 419                 wpa_printf(MSG_DEBUG, "nl80211: Interface down");
 420                 drv->if_disabled = 1;
 421                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
 422         }
 423
 424         if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
 425                 wpa_printf(MSG_DEBUG, "nl80211: Interface up");
 426                 drv->if_disabled = 0;
 427                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
 428         }
 429
 430         /*
 431          * Some drivers send the association event before the operup event--in
 432          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 433          * fails. This will hit us when wpa_supplicant does not need to do
 434          * IEEE 802.1X authentication
 435          */
 436         if (drv->operstate == 1 &&
 437             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 438             !(ifi->ifi_flags & IFF_RUNNING))
 439                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 440                                        -1, IF_OPER_UP);
 441
 442         attrlen = len;
 443         attr = (struct rtattr *) buf;
 444         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 445         while (RTA_OK(attr, attrlen)) {
 446                 if (attr->rta_type == IFLA_IFNAME) {
 447                         wpa_driver_nl80211_event_link(
 448                                 drv,
 449                                 ((char *) attr) + rta_len,
 450                                 attr->rta_len - rta_len, 0);
 451                 } else if (attr->rta_type == IFLA_MASTER)
 452                         brid = nla_get_u32((struct nlattr *) attr);
 453                 attr = RTA_NEXT(attr, attrlen);
 454         }
 455
 456 #ifdef HOSTAPD
 457         if (ifi->ifi_family == AF_BRIDGE && brid) {
 458                 /* device has been added to bridge */
 459                 char namebuf[IFNAMSIZ];
 460                 if_indextoname(brid, namebuf);
 461                 wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
 462                            brid, namebuf);
 463                 add_ifidx(drv, brid);
 464         }
 465 #endif /* HOSTAPD */
 466 }
 467
 468
 469 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 470                                                  struct ifinfomsg *ifi,
 471                                                  u8 *buf, size_t len)
 472 {
 473         struct wpa_driver_nl80211_data *drv = ctx;
 474         int attrlen, rta_len;
 475         struct rtattr *attr;
 476         u32 brid = 0;
 477
 478         attrlen = len;
 479         attr = (struct rtattr *) buf;
 480
 481         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 482         while (RTA_OK(attr, attrlen)) {
 483                 if (attr->rta_type == IFLA_IFNAME) {
 484                         wpa_driver_nl80211_event_link(
 485                                 drv,
 486                                 ((char *) attr) + rta_len,
 487                                 attr->rta_len - rta_len, 1);
 488                 } else if (attr->rta_type == IFLA_MASTER)
 489                         brid = nla_get_u32((struct nlattr *) attr);
 490                 attr = RTA_NEXT(attr, attrlen);
 491         }
 492
 493 #ifdef HOSTAPD
 494         if (ifi->ifi_family == AF_BRIDGE && brid) {
 495                 /* device has been removed from bridge */
 496                 char namebuf[IFNAMSIZ];
 497                 if_indextoname(brid, namebuf);
 498                 wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
 499                            "%s", brid, namebuf);
 500                 del_ifidx(drv, brid);
 501         }
 502 #endif /* HOSTAPD */
 503 }
 504
 505
 506 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 507                             const u8 *frame, size_t len)
 508 {
 509         const struct ieee80211_mgmt *mgmt;
 510         union wpa_event_data event;
 511
 512         mgmt = (const struct ieee80211_mgmt *) frame;
 513         if (len < 24 + sizeof(mgmt->u.auth)) {
 514                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 515                            "frame");
 516                 return;
 517         }
 518
 519         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 520         os_memset(&event, 0, sizeof(event));
 521         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 522         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 523         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 524         if (len > 24 + sizeof(mgmt->u.auth)) {
 525                 event.auth.ies = mgmt->u.auth.variable;
 526                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 527         }
 528
 529         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 530 }
 531
 532
 533 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 534                             const u8 *frame, size_t len)
 535 {
 536         const struct ieee80211_mgmt *mgmt;
 537         union wpa_event_data event;
 538         u16 status;
 539
 540         mgmt = (const struct ieee80211_mgmt *) frame;
 541         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 542                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 543                            "frame");
 544                 return;
 545         }
 546
 547         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 548         if (status != WLAN_STATUS_SUCCESS) {
 549                 os_memset(&event, 0, sizeof(event));
 550                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 551                         event.assoc_reject.resp_ies =
 552                                 (u8 *) mgmt->u.assoc_resp.variable;
 553                         event.assoc_reject.resp_ies_len =
 554                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 555                 }
 556                 event.assoc_reject.status_code = status;
 557
 558                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 559                 return;
 560         }
 561
 562         drv->associated = 1;
 563         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 564
 565         os_memset(&event, 0, sizeof(event));
 566         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 567                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 568                 event.assoc_info.resp_ies_len =
 569                         len - 24 - sizeof(mgmt->u.assoc_resp);
 570         }
 571
 572         event.assoc_info.freq = drv->assoc_freq;
 573
 574         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 575 }
 576
 577
 578 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 579                                enum nl80211_commands cmd, struct nlattr *status,
 580                                struct nlattr *addr, struct nlattr *req_ie,
 581                                struct nlattr *resp_ie)
 582 {
 583         union wpa_event_data event;
 584
 585         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 586                 /*
 587                  * Avoid reporting two association events that would confuse
 588                  * the core code.
 589                  */
 590                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 591                            "when using userspace SME", cmd);
 592                 return;
 593         }
 594
 595         os_memset(&event, 0, sizeof(event));
 596         if (cmd == NL80211_CMD_CONNECT &&
 597             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 598                 if (resp_ie) {
 599                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 600                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 601                 }
 602                 event.assoc_reject.status_code = nla_get_u16(status);
 603                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 604                 return;
 605         }
 606
 607         drv->associated = 1;
 608         if (addr)
 609                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 610
 611         if (req_ie) {
 612                 event.assoc_info.req_ies = nla_data(req_ie);
 613                 event.assoc_info.req_ies_len = nla_len(req_ie);
 614         }
 615         if (resp_ie) {
 616                 event.assoc_info.resp_ies = nla_data(resp_ie);
 617                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 618         }
 619
 620         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 621 }
 622
 623
 624 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 625                                enum nl80211_commands cmd, struct nlattr *addr)
 626 {
 627         union wpa_event_data event;
 628         enum wpa_event_type ev;
 629
 630         if (nla_len(addr) != ETH_ALEN)
 631                 return;
 632
 633         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 634                    cmd, MAC2STR((u8 *) nla_data(addr)));
 635
 636         if (cmd == NL80211_CMD_AUTHENTICATE)
 637                 ev = EVENT_AUTH_TIMED_OUT;
 638         else if (cmd == NL80211_CMD_ASSOCIATE)
 639                 ev = EVENT_ASSOC_TIMED_OUT;
 640         else
 641                 return;
 642
 643         os_memset(&event, 0, sizeof(event));
 644         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 645         wpa_supplicant_event(drv->ctx, ev, &event);
 646 }
 647
 648
 649 static void mlme_event_action(struct wpa_driver_nl80211_data *drv,
 650                               struct nlattr *freq, const u8 *frame, size_t len)
 651 {
 652         const struct ieee80211_mgmt *mgmt;
 653         union wpa_event_data event;
 654         u16 fc, stype;
 655
 656         mgmt = (const struct ieee80211_mgmt *) frame;
 657         if (len < 24) {
 658                 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
 659                 return;
 660         }
 661
 662         fc = le_to_host16(mgmt->frame_control);
 663         stype = WLAN_FC_GET_STYPE(fc);
 664
 665         os_memset(&event, 0, sizeof(event));
 666         event.rx_action.da = mgmt->da;
 667         event.rx_action.sa = mgmt->sa;
 668         event.rx_action.bssid = mgmt->bssid;
 669         event.rx_action.category = mgmt->u.action.category;
 670         event.rx_action.data = &mgmt->u.action.category + 1;
 671         event.rx_action.len = frame + len - event.rx_action.data;
 672         if (freq)
 673                 event.rx_action.freq = nla_get_u32(freq);
 674         wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
 675 }
 676
 677
 678 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
 679                                         struct nlattr *cookie, const u8 *frame,
 680                                         size_t len, struct nlattr *ack)
 681 {
 682         union wpa_event_data event;
 683         const struct ieee80211_hdr *hdr;
 684         u16 fc;
 685         u64 cookie_val;
 686
 687         if (!cookie)
 688                 return;
 689
 690         cookie_val = nla_get_u64(cookie);
 691         wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s "
 692                    "(ack=%d)",
 693                    (long long unsigned int) cookie_val,
 694                    cookie_val == drv->send_action_cookie ?
 695                    " (match)" : " (unknown)", ack != NULL);
 696         if (cookie_val != drv->send_action_cookie)
 697                 return;
 698
 699         hdr = (const struct ieee80211_hdr *) frame;
 700         fc = le_to_host16(hdr->frame_control);
 701
 702         os_memset(&event, 0, sizeof(event));
 703         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
 704         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
 705         event.tx_status.dst = hdr->addr1;
 706         event.tx_status.data = frame;
 707         event.tx_status.data_len = len;
 708         event.tx_status.ack = ack != NULL;
 709         wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
 710 }
 711
 712
 713 static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
 714                                        enum wpa_event_type type,
 715                                        const u8 *frame, size_t len)
 716 {
 717         const struct ieee80211_mgmt *mgmt;
 718         union wpa_event_data event;
 719         const u8 *bssid = NULL;
 720         u16 reason_code = 0;
 721
 722         mgmt = (const struct ieee80211_mgmt *) frame;
 723         if (len >= 24) {
 724                 bssid = mgmt->bssid;
 725
 726                 if (drv->associated != 0 &&
 727                     os_memcmp(bssid, drv->bssid, ETH_ALEN) != 0 &&
 728                     os_memcmp(bssid, drv->auth_bssid, ETH_ALEN) != 0) {
 729                         /*
 730                          * We have presumably received this deauth as a
 731                          * response to a clear_state_mismatch() outgoing
 732                          * deauth.  Don't let it take us offline!
 733                          */
 734                         wpa_printf(MSG_DEBUG, "nl80211: Deauth received "
 735                                    "from Unknown BSSID " MACSTR " -- ignoring",
 736                                    MAC2STR(bssid));
 737                         return;
 738                 }
 739         }
 740
 741         drv->associated = 0;
 742         os_memset(&event, 0, sizeof(event));
 743
 744         /* Note: Same offset for Reason Code in both frame subtypes */
 745         if (len >= 24 + sizeof(mgmt->u.deauth))
 746                 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
 747
 748         if (type == EVENT_DISASSOC) {
 749                 event.disassoc_info.addr = bssid;
 750                 event.disassoc_info.reason_code = reason_code;
 751                 if (frame + len > mgmt->u.disassoc.variable) {
 752                         event.disassoc_info.ie = mgmt->u.disassoc.variable;
 753                         event.disassoc_info.ie_len = frame + len -
 754                                 mgmt->u.disassoc.variable;
 755                 }
 756         } else {
 757                 event.deauth_info.addr = bssid;
 758                 event.deauth_info.reason_code = reason_code;
 759                 if (frame + len > mgmt->u.deauth.variable) {
 760                         event.deauth_info.ie = mgmt->u.deauth.variable;
 761                         event.deauth_info.ie_len = frame + len -
 762                                 mgmt->u.deauth.variable;
 763                 }
 764         }
 765
 766         wpa_supplicant_event(drv->ctx, type, &event);
 767 }
 768
 769
 770 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 771                        enum nl80211_commands cmd, struct nlattr *frame,
 772                        struct nlattr *addr, struct nlattr *timed_out,
 773                        struct nlattr *freq, struct nlattr *ack,
 774                        struct nlattr *cookie)
 775 {
 776         if (timed_out && addr) {
 777                 mlme_timeout_event(drv, cmd, addr);
 778                 return;
 779         }
 780
 781         if (frame == NULL) {
 782                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 783                            "data", cmd);
 784                 return;
 785         }
 786
 787         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 788         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 789                     nla_data(frame), nla_len(frame));
 790
 791         switch (cmd) {
 792         case NL80211_CMD_AUTHENTICATE:
 793                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 794                 break;
 795         case NL80211_CMD_ASSOCIATE:
 796                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 797                 break;
 798         case NL80211_CMD_DEAUTHENTICATE:
 799                 mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
 800                                            nla_data(frame), nla_len(frame));
 801                 break;
 802         case NL80211_CMD_DISASSOCIATE:
 803                 mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
 804                                            nla_data(frame), nla_len(frame));
 805                 break;
 806         case NL80211_CMD_ACTION:
 807                 mlme_event_action(drv, freq, nla_data(frame), nla_len(frame));
 808                 break;
 809         case NL80211_CMD_ACTION_TX_STATUS:
 810                 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
 811                                             nla_len(frame), ack);
 812                 break;
 813         default:
 814                 break;
 815         }
 816 }
 817
 818
 819 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 820                                            struct nlattr *tb[])
 821 {
 822         union wpa_event_data data;
 823
 824         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 825         os_memset(&data, 0, sizeof(data));
 826         if (tb[NL80211_ATTR_MAC]) {
 827                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 828                             nla_data(tb[NL80211_ATTR_MAC]),
 829                             nla_len(tb[NL80211_ATTR_MAC]));
 830                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 831         }
 832         if (tb[NL80211_ATTR_KEY_SEQ]) {
 833                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 834                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 835                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 836         }
 837         if (tb[NL80211_ATTR_KEY_TYPE]) {
 838                 enum nl80211_key_type key_type =
 839                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 840                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 841                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 842                         data.michael_mic_failure.unicast = 1;
 843         } else
 844                 data.michael_mic_failure.unicast = 1;
 845
 846         if (tb[NL80211_ATTR_KEY_IDX]) {
 847                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 848                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 849         }
 850
 851         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 852 }
 853
 854
 855 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 856                                  struct nlattr *tb[])
 857 {
 858         if (tb[NL80211_ATTR_MAC] == NULL) {
 859                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 860                            "event");
 861                 return;
 862         }
 863         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 864         drv->associated = 1;
 865         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 866                    MAC2STR(drv->bssid));
 867
 868         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 869 }
 870
 871
 872 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
 873                                          int cancel_event, struct nlattr *tb[])
 874 {
 875         unsigned int freq, chan_type, duration;
 876         union wpa_event_data data;
 877         u64 cookie;
 878
 879         if (tb[NL80211_ATTR_WIPHY_FREQ])
 880                 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 881         else
 882                 freq = 0;
 883
 884         if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
 885                 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 886         else
 887                 chan_type = 0;
 888
 889         if (tb[NL80211_ATTR_DURATION])
 890                 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
 891         else
 892                 duration = 0;
 893
 894         if (tb[NL80211_ATTR_COOKIE])
 895                 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
 896         else
 897                 cookie = 0;
 898
 899         wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
 900                    "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
 901                    cancel_event, freq, chan_type, duration,
 902                    (long long unsigned int) cookie,
 903                    cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
 904
 905         if (cookie != drv->remain_on_chan_cookie)
 906                 return; /* not for us */
 907
 908         drv->pending_remain_on_chan = !cancel_event;
 909
 910         os_memset(&data, 0, sizeof(data));
 911         data.remain_on_channel.freq = freq;
 912         data.remain_on_channel.duration = duration;
 913         wpa_supplicant_event(drv->ctx, cancel_event ?
 914                              EVENT_CANCEL_REMAIN_ON_CHANNEL :
 915                              EVENT_REMAIN_ON_CHANNEL, &data);
 916 }
 917
 918
 919 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 920                             struct nlattr *tb[])
 921 {
 922         union wpa_event_data event;
 923         struct nlattr *nl;
 924         int rem;
 925         struct scan_info *info;
 926 #define MAX_REPORT_FREQS 50
 927         int freqs[MAX_REPORT_FREQS];
 928         int num_freqs = 0;
 929
 930         os_memset(&event, 0, sizeof(event));
 931         info = &event.scan_info;
 932         info->aborted = aborted;
 933
 934         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 935                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
 936                         struct wpa_driver_scan_ssid *s =
 937                                 &info->ssids[info->num_ssids];
 938                         s->ssid = nla_data(nl);
 939                         s->ssid_len = nla_len(nl);
 940                         info->num_ssids++;
 941                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
 942                                 break;
 943                 }
 944         }
 945         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 946                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
 947                 {
 948                         freqs[num_freqs] = nla_get_u32(nl);
 949                         num_freqs++;
 950                         if (num_freqs == MAX_REPORT_FREQS - 1)
 951                                 break;
 952                 }
 953                 info->freqs = freqs;
 954                 info->num_freqs = num_freqs;
 955         }
 956         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
 957 }
 958
 959
 960 static int get_link_signal(struct nl_msg *msg, void *arg)
 961 {
 962         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 963         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 964         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
 965         static struct nla_policy policy[NL80211_STA_INFO_MAX + 1] = {
 966                 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
 967         };
 968         int *sig = arg;
 969
 970         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 971                   genlmsg_attrlen(gnlh, 0), NULL);
 972         if (!tb[NL80211_ATTR_STA_INFO] ||
 973             nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
 974                              tb[NL80211_ATTR_STA_INFO], policy))
 975                 return NL_SKIP;
 976         if (!sinfo[NL80211_STA_INFO_SIGNAL])
 977                 return NL_SKIP;
 978
 979         *sig = (s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
 980         return NL_SKIP;
 981 }
 982
 983
 984 static int nl80211_get_link_signal(struct wpa_driver_nl80211_data *drv,
 985                                    int *sig)
 986 {
 987         struct nl_msg *msg;
 988
 989         *sig = -9999;
 990
 991         msg = nlmsg_alloc();
 992         if (!msg)
 993                 return -ENOMEM;
 994
 995         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 996                     0, NL80211_CMD_GET_STATION, 0);
 997
 998         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 999         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
1000
1001         return send_and_recv_msgs(drv, msg, get_link_signal, sig);
1002  nla_put_failure:
1003         return -ENOBUFS;
1004 }
1005
1006
1007 static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
1008                               struct nlattr *tb[])
1009 {
1010         static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
1011                 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
1012                 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
1013                 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
1014         };
1015         struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
1016         enum nl80211_cqm_rssi_threshold_event event;
1017         union wpa_event_data ed;
1018         int sig, res;
1019
1020         if (tb[NL80211_ATTR_CQM] == NULL ||
1021             nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
1022                              cqm_policy)) {
1023                 wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
1024                 return;
1025         }
1026
1027         if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
1028                 return;
1029         event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
1030
1031         os_memset(&ed, 0, sizeof(ed));
1032
1033         if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
1034                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1035                            "event: RSSI high");
1036                 ed.signal_change.above_threshold = 1;
1037         } else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
1038                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1039                            "event: RSSI low");
1040                 ed.signal_change.above_threshold = 0;
1041         } else
1042                 return;
1043
1044         res = nl80211_get_link_signal(drv, &sig);
1045         if (res == 0) {
1046                 ed.signal_change.current_signal = sig;
1047                 wpa_printf(MSG_DEBUG, "nl80211: Signal: %d dBm", sig);
1048         }
1049
1050         wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
1051 }
1052
1053
1054 static int process_event(struct nl_msg *msg, void *arg)
1055 {
1056         struct wpa_driver_nl80211_data *drv = arg;
1057         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1058         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1059         union wpa_event_data data;
1060
1061         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1062                   genlmsg_attrlen(gnlh, 0), NULL);
1063
1064         if (tb[NL80211_ATTR_IFINDEX]) {
1065                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1066                 if (ifindex != drv->ifindex && !have_ifidx(drv, ifindex)) {
1067                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
1068                                    " for foreign interface (ifindex %d)",
1069                                    gnlh->cmd, ifindex);
1070                         return NL_SKIP;
1071                 }
1072         }
1073
1074         if (drv->ap_scan_as_station &&
1075             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
1076              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
1077                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1078                                             IEEE80211_MODE_AP);
1079                 drv->ap_scan_as_station = 0;
1080         }
1081
1082         switch (gnlh->cmd) {
1083         case NL80211_CMD_TRIGGER_SCAN:
1084                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
1085                 break;
1086         case NL80211_CMD_NEW_SCAN_RESULTS:
1087                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
1088                 drv->scan_complete_events = 1;
1089                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1090                                      drv->ctx);
1091                 send_scan_event(drv, 0, tb);
1092                 break;
1093         case NL80211_CMD_SCAN_ABORTED:
1094                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
1095                 /*
1096                  * Need to indicate that scan results are available in order
1097                  * not to make wpa_supplicant stop its scanning.
1098                  */
1099                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1100                                      drv->ctx);
1101                 send_scan_event(drv, 1, tb);
1102                 break;
1103         case NL80211_CMD_AUTHENTICATE:
1104         case NL80211_CMD_ASSOCIATE:
1105         case NL80211_CMD_DEAUTHENTICATE:
1106         case NL80211_CMD_DISASSOCIATE:
1107         case NL80211_CMD_ACTION:
1108         case NL80211_CMD_ACTION_TX_STATUS:
1109                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
1110                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
1111                            tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
1112                            tb[NL80211_ATTR_COOKIE]);
1113                 break;
1114         case NL80211_CMD_CONNECT:
1115         case NL80211_CMD_ROAM:
1116                 mlme_event_connect(drv, gnlh->cmd,
1117                                    tb[NL80211_ATTR_STATUS_CODE],
1118                                    tb[NL80211_ATTR_MAC],
1119                                    tb[NL80211_ATTR_REQ_IE],
1120                                    tb[NL80211_ATTR_RESP_IE]);
1121                 break;
1122         case NL80211_CMD_DISCONNECT:
1123                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1124                         /*
1125                          * Avoid reporting two disassociation events that could
1126                          * confuse the core code.
1127                          */
1128                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
1129                                    "event when using userspace SME");
1130                         break;
1131                 }
1132                 drv->associated = 0;
1133                 os_memset(&data, 0, sizeof(data));
1134                 if (tb[NL80211_ATTR_REASON_CODE])
1135                         data.disassoc_info.reason_code =
1136                                 nla_get_u16(tb[NL80211_ATTR_REASON_CODE]);
1137                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, &data);
1138                 break;
1139         case NL80211_CMD_MICHAEL_MIC_FAILURE:
1140                 mlme_event_michael_mic_failure(drv, tb);
1141                 break;
1142         case NL80211_CMD_JOIN_IBSS:
1143                 mlme_event_join_ibss(drv, tb);
1144                 break;
1145         case NL80211_CMD_REMAIN_ON_CHANNEL:
1146                 mlme_event_remain_on_channel(drv, 0, tb);
1147                 break;
1148         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
1149                 mlme_event_remain_on_channel(drv, 1, tb);
1150                 break;
1151         case NL80211_CMD_NOTIFY_CQM:
1152                 nl80211_cqm_event(drv, tb);
1153                 break;
1154         default:
1155                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1156                            "(cmd=%d)", gnlh->cmd);
1157                 break;
1158         }
1159
1160         return NL_SKIP;
1161 }
1162
1163
1164 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1165                                              void *sock_ctx)
1166 {
1167         struct nl_cb *cb;
1168         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1169
1170         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1171
1172         cb = nl_cb_clone(drv->nl_cb);
1173         if (!cb)
1174                 return;
1175         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1176         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1177         nl_recvmsgs(drv->nl_handle_event, cb);
1178         nl_cb_put(cb);
1179 }
1180
1181
1182 /**
1183  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1184  * @priv: driver_nl80211 private data
1185  * @alpha2_arg: country to which to switch to
1186  * Returns: 0 on success, -1 on failure
1187  *
1188  * This asks nl80211 to set the regulatory domain for given
1189  * country ISO / IEC alpha2.
1190  */
1191 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1192 {
1193         struct i802_bss *bss = priv;
1194         struct wpa_driver_nl80211_data *drv = bss->drv;
1195         char alpha2[3];
1196         struct nl_msg *msg;
1197
1198         msg = nlmsg_alloc();
1199         if (!msg)
1200                 return -ENOMEM;
1201
1202         alpha2[0] = alpha2_arg[0];
1203         alpha2[1] = alpha2_arg[1];
1204         alpha2[2] = '\0';
1205
1206         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1207                     0, NL80211_CMD_REQ_SET_REG, 0);
1208
1209         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1210         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1211                 return -EINVAL;
1212         return 0;
1213 nla_put_failure:
1214         return -EINVAL;
1215 }
1216
1217
1218 #ifndef HOSTAPD
1219 struct wiphy_info_data {
1220         int max_scan_ssids;
1221         int ap_supported;
1222         int auth_supported;
1223         int connect_supported;
1224 };
1225
1226
1227 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1228 {
1229         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1230         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1231         struct wiphy_info_data *info = arg;
1232
1233         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1234                   genlmsg_attrlen(gnlh, 0), NULL);
1235
1236         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1237                 info->max_scan_ssids =
1238                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1239
1240         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1241                 struct nlattr *nl_mode;
1242                 int i;
1243                 nla_for_each_nested(nl_mode,
1244                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1245                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1246                                 info->ap_supported = 1;
1247                                 break;
1248                         }
1249                 }
1250         }
1251
1252         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1253                 struct nlattr *nl_cmd;
1254                 int i;
1255
1256                 nla_for_each_nested(nl_cmd,
1257                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1258                         u32 cmd = nla_get_u32(nl_cmd);
1259                         if (cmd == NL80211_CMD_AUTHENTICATE)
1260                                 info->auth_supported = 1;
1261                         else if (cmd == NL80211_CMD_CONNECT)
1262                                 info->connect_supported = 1;
1263                 }
1264         }
1265
1266         return NL_SKIP;
1267 }
1268
1269
1270 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1271                                        struct wiphy_info_data *info)
1272 {
1273         struct nl_msg *msg;
1274
1275         os_memset(info, 0, sizeof(*info));
1276         msg = nlmsg_alloc();
1277         if (!msg)
1278                 return -1;
1279
1280         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1281                     0, NL80211_CMD_GET_WIPHY, 0);
1282
1283         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1284
1285         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1286                 return 0;
1287         msg = NULL;
1288 nla_put_failure:
1289         nlmsg_free(msg);
1290         return -1;
1291 }
1292
1293
1294 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1295 {
1296         struct wiphy_info_data info;
1297         if (wpa_driver_nl80211_get_info(drv, &info))
1298                 return -1;
1299         drv->has_capability = 1;
1300         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1301         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1302                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1303                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1304                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1305         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1306                 WPA_DRIVER_CAPA_ENC_WEP104 |
1307                 WPA_DRIVER_CAPA_ENC_TKIP |
1308                 WPA_DRIVER_CAPA_ENC_CCMP;
1309         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1310                 WPA_DRIVER_AUTH_SHARED |
1311                 WPA_DRIVER_AUTH_LEAP;
1312
1313         drv->capa.max_scan_ssids = info.max_scan_ssids;
1314         if (info.ap_supported)
1315                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1316
1317         if (info.auth_supported)
1318                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1319         else if (!info.connect_supported) {
1320                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1321                            "authentication/association or connect commands");
1322                 return -1;
1323         }
1324
1325         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1326         drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CAPABLE;
1327         drv->capa.max_remain_on_chan = 5000;
1328
1329         return 0;
1330 }
1331 #endif /* HOSTAPD */
1332
1333
1334 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
1335 {
1336         int ret;
1337
1338         /* Initialize generic netlink and nl80211 */
1339
1340         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1341         if (drv->nl_cb == NULL) {
1342                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1343                            "callbacks");
1344                 goto err1;
1345         }
1346
1347         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1348         if (drv->nl_handle == NULL) {
1349                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1350                            "callbacks");
1351                 goto err2;
1352         }
1353
1354         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1355         if (drv->nl_handle_event == NULL) {
1356                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1357                            "callbacks (event)");
1358                 goto err2b;
1359         }
1360
1361         if (genl_connect(drv->nl_handle)) {
1362                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1363                            "netlink");
1364                 goto err3;
1365         }
1366
1367         if (genl_connect(drv->nl_handle_event)) {
1368                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1369                            "netlink (event)");
1370                 goto err3;
1371         }
1372
1373 #ifdef CONFIG_LIBNL20
1374         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1375                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1376                            "netlink cache");
1377                 goto err3;
1378         }
1379         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1380             0) {
1381                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1382                            "netlink cache (event)");
1383                 goto err3b;
1384         }
1385 #else /* CONFIG_LIBNL20 */
1386         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1387         if (drv->nl_cache == NULL) {
1388                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1389                            "netlink cache");
1390                 goto err3;
1391         }
1392         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1393         if (drv->nl_cache_event == NULL) {
1394                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1395                            "netlink cache (event)");
1396                 goto err3b;
1397         }
1398 #endif /* CONFIG_LIBNL20 */
1399
1400         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1401         if (drv->nl80211 == NULL) {
1402                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1403                            "found");
1404                 goto err4;
1405         }
1406
1407         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1408         if (ret >= 0)
1409                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1410         if (ret < 0) {
1411                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1412                            "membership for scan events: %d (%s)",
1413                            ret, strerror(-ret));
1414                 goto err4;
1415         }
1416
1417         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1418         if (ret >= 0)
1419                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1420         if (ret < 0) {
1421                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1422                            "membership for mlme events: %d (%s)",
1423                            ret, strerror(-ret));
1424                 goto err4;
1425         }
1426
1427         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1428                                  wpa_driver_nl80211_event_receive, drv, NULL);
1429
1430         return 0;
1431
1432 err4:
1433         nl_cache_free(drv->nl_cache_event);
1434 err3b:
1435         nl_cache_free(drv->nl_cache);
1436 err3:
1437         nl_handle_destroy(drv->nl_handle_event);
1438 err2b:
1439         nl_handle_destroy(drv->nl_handle);
1440 err2:
1441         nl_cb_put(drv->nl_cb);
1442 err1:
1443         return -1;
1444 }
1445
1446
1447 static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
1448 {
1449         wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");
1450         /*
1451          * This may be for any interface; use ifdown event to disable
1452          * interface.
1453          */
1454 }
1455
1456
1457 static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
1458 {
1459         struct wpa_driver_nl80211_data *drv = ctx;
1460         wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
1461         if (linux_set_iface_flags(drv->ioctl_sock, drv->first_bss.ifname, 1)) {
1462                 wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
1463                            "after rfkill unblock");
1464                 return;
1465         }
1466         /* rtnetlink ifup handler will report interface as enabled */
1467 }
1468
1469
1470 /**
1471  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1472  * @ctx: context to be used when calling wpa_supplicant functions,
1473  * e.g., wpa_supplicant_event()
1474  * @ifname: interface name, e.g., wlan0
1475  * Returns: Pointer to private data, %NULL on failure
1476  */
1477 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1478 {
1479         struct wpa_driver_nl80211_data *drv;
1480         struct netlink_config *cfg;
1481         struct rfkill_config *rcfg;
1482         struct i802_bss *bss;
1483
1484         drv = os_zalloc(sizeof(*drv));
1485         if (drv == NULL)
1486                 return NULL;
1487         drv->ctx = ctx;
1488         bss = &drv->first_bss;
1489         bss->drv = drv;
1490         os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
1491         drv->monitor_ifidx = -1;
1492         drv->monitor_sock = -1;
1493         drv->ioctl_sock = -1;
1494
1495         if (wpa_driver_nl80211_init_nl(drv)) {
1496                 os_free(drv);
1497                 return NULL;
1498         }
1499
1500         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1501         if (drv->ioctl_sock < 0) {
1502                 perror("socket(PF_INET,SOCK_DGRAM)");
1503                 goto failed;
1504         }
1505
1506         cfg = os_zalloc(sizeof(*cfg));
1507         if (cfg == NULL)
1508                 goto failed;
1509         cfg->ctx = drv;
1510         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1511         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1512         drv->netlink = netlink_init(cfg);
1513         if (drv->netlink == NULL) {
1514                 os_free(cfg);
1515                 goto failed;
1516         }
1517
1518         rcfg = os_zalloc(sizeof(*rcfg));
1519         if (rcfg == NULL)
1520                 goto failed;
1521         rcfg->ctx = drv;
1522         os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
1523         rcfg->blocked_cb = wpa_driver_nl80211_rfkill_blocked;
1524         rcfg->unblocked_cb = wpa_driver_nl80211_rfkill_unblocked;
1525         drv->rfkill = rfkill_init(rcfg);
1526         if (drv->rfkill == NULL) {
1527                 wpa_printf(MSG_DEBUG, "nl80211: RFKILL status not available");
1528                 os_free(rcfg);
1529         }
1530
1531         if (wpa_driver_nl80211_finish_drv_init(drv))
1532                 goto failed;
1533
1534         return bss;
1535
1536 failed:
1537         rfkill_deinit(drv->rfkill);
1538         netlink_deinit(drv->netlink);
1539         if (drv->ioctl_sock >= 0)
1540                 close(drv->ioctl_sock);
1541
1542         genl_family_put(drv->nl80211);
1543         nl_cache_free(drv->nl_cache);
1544         nl_handle_destroy(drv->nl_handle);
1545         nl_cb_put(drv->nl_cb);
1546         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1547
1548         os_free(drv);
1549         return NULL;
1550 }
1551
1552
1553 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1554                                          const u8 *match, size_t match_len)
1555 {
1556         struct nl_msg *msg;
1557         int ret = -1;
1558
1559         msg = nlmsg_alloc();
1560         if (!msg)
1561                 return -1;
1562
1563         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1564                     NL80211_CMD_REGISTER_ACTION, 0);
1565
1566         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1567         NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1568
1569         ret = send_and_recv(drv, drv->nl_handle_event, msg, NULL, NULL);
1570         msg = NULL;
1571         if (ret) {
1572                 wpa_printf(MSG_DEBUG, "nl80211: Register Action command "
1573                            "failed: ret=%d (%s)", ret, strerror(-ret));
1574                 wpa_hexdump(MSG_DEBUG, "nl80211: Register Action match",
1575                             match, match_len);
1576                 goto nla_put_failure;
1577         }
1578         ret = 0;
1579 nla_put_failure:
1580         nlmsg_free(msg);
1581         return ret;
1582 }
1583
1584
1585 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1586 {
1587 #ifdef CONFIG_P2P
1588         /* GAS Initial Request */
1589         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0a", 2) < 0)
1590                 return -1;
1591         /* GAS Initial Response */
1592         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0b", 2) < 0)
1593                 return -1;
1594         /* GAS Comeback Request */
1595         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0c", 2) < 0)
1596                 return -1;
1597         /* GAS Comeback Response */
1598         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0d", 2) < 0)
1599                 return -1;
1600         /* P2P Public Action */
1601         if (nl80211_register_action_frame(drv,
1602                                           (u8 *) "\x04\x09\x50\x6f\x9a\x09",
1603                                           6) < 0)
1604                 return -1;
1605         /* P2P Action */
1606         if (nl80211_register_action_frame(drv,
1607                                           (u8 *) "\x7f\x50\x6f\x9a\x09",
1608                                           5) < 0)
1609                 return -1;
1610 #endif /* CONFIG_P2P */
1611
1612         /* FT Action frames */
1613         if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
1614                 return -1;
1615         else
1616                 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
1617                         WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
1618
1619         return 0;
1620 }
1621
1622
1623 static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
1624 {
1625         wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
1626 }
1627
1628
1629 static int
1630 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1631 {
1632         struct i802_bss *bss = &drv->first_bss;
1633         int send_rfkill_event = 0;
1634
1635         drv->ifindex = if_nametoindex(bss->ifname);
1636         drv->first_bss.ifindex = drv->ifindex;
1637
1638 #ifndef HOSTAPD
1639         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
1640                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1641                            "use managed mode");
1642         }
1643
1644         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
1645                 if (rfkill_is_blocked(drv->rfkill)) {
1646                         wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
1647                                    "interface '%s' due to rfkill",
1648                                    bss->ifname);
1649                         drv->if_disabled = 1;
1650                         send_rfkill_event = 1;
1651                 } else {
1652                         wpa_printf(MSG_ERROR, "nl80211: Could not set "
1653                                    "interface '%s' UP", bss->ifname);
1654                         return -1;
1655                 }
1656         }
1657
1658         if (wpa_driver_nl80211_capa(drv))
1659                 return -1;
1660
1661         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1662                                1, IF_OPER_DORMANT);
1663 #endif /* HOSTAPD */
1664
1665         if (nl80211_register_action_frames(drv) < 0) {
1666                 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
1667                            "frame processing - ignore for now");
1668                 /*
1669                  * Older kernel versions did not support this, so ignore the
1670                  * error for now. Some functionality may not be available
1671                  * because of this.
1672                  */
1673         }
1674
1675         if (send_rfkill_event) {
1676                 eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
1677                                        drv, drv->ctx);
1678         }
1679
1680         return 0;
1681 }
1682
1683
1684 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1685 {
1686         struct nl_msg *msg;
1687
1688         msg = nlmsg_alloc();
1689         if (!msg)
1690                 return -ENOMEM;
1691
1692         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1693                     0, NL80211_CMD_DEL_BEACON, 0);
1694         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1695
1696         return send_and_recv_msgs(drv, msg, NULL, NULL);
1697  nla_put_failure:
1698         return -ENOBUFS;
1699 }
1700
1701
1702 /**
1703  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1704  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1705  *
1706  * Shut down driver interface and processing of driver events. Free
1707  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1708  */
1709 static void wpa_driver_nl80211_deinit(void *priv)
1710 {
1711         struct i802_bss *bss = priv;
1712         struct wpa_driver_nl80211_data *drv = bss->drv;
1713
1714         if (drv->added_if_into_bridge) {
1715                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
1716                     < 0)
1717                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1718                                    "interface %s from bridge %s: %s",
1719                                    bss->ifname, drv->brname, strerror(errno));
1720         }
1721         if (drv->added_bridge) {
1722                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1723                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1724                                    "bridge %s: %s",
1725                                    drv->brname, strerror(errno));
1726         }
1727
1728         nl80211_remove_monitor_interface(drv);
1729
1730         if (drv->nlmode == NL80211_IFTYPE_AP)
1731                 wpa_driver_nl80211_del_beacon(drv);
1732
1733 #ifdef HOSTAPD
1734         if (drv->last_freq_ht) {
1735                 /* Clear HT flags from the driver */
1736                 struct hostapd_freq_params freq;
1737                 os_memset(&freq, 0, sizeof(freq));
1738                 freq.freq = drv->last_freq;
1739                 i802_set_freq(priv, &freq);
1740         }
1741
1742         if (drv->eapol_sock >= 0) {
1743                 eloop_unregister_read_sock(drv->eapol_sock);
1744                 close(drv->eapol_sock);
1745         }
1746
1747         if (drv->if_indices != drv->default_if_indices)
1748                 os_free(drv->if_indices);
1749 #endif /* HOSTAPD */
1750
1751         if (drv->disable_11b_rates)
1752                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1753
1754         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1755         netlink_deinit(drv->netlink);
1756         rfkill_deinit(drv->rfkill);
1757
1758         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1759
1760         (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
1761         wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
1762
1763         if (drv->ioctl_sock >= 0)
1764                 close(drv->ioctl_sock);
1765
1766         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1767         genl_family_put(drv->nl80211);
1768         nl_cache_free(drv->nl_cache);
1769         nl_cache_free(drv->nl_cache_event);
1770         nl_handle_destroy(drv->nl_handle);
1771         nl_handle_destroy(drv->nl_handle_event);
1772         nl_cb_put(drv->nl_cb);
1773
1774         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1775                              drv, NULL);
1776
1777         os_free(drv->filter_ssids);
1778
1779         os_free(drv);
1780 }
1781
1782
1783 /**
1784  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1785  * @eloop_ctx: Driver private data
1786  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1787  *
1788  * This function can be used as registered timeout when starting a scan to
1789  * generate a scan completed event if the driver does not report this.
1790  */
1791 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1792 {
1793         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1794         if (drv->ap_scan_as_station) {
1795                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1796                                             IEEE80211_MODE_AP);
1797                 drv->ap_scan_as_station = 0;
1798         }
1799         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1800         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1801 }
1802
1803
1804 /**
1805  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1806  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1807  * @params: Scan parameters
1808  * Returns: 0 on success, -1 on failure
1809  */
1810 static int wpa_driver_nl80211_scan(void *priv,
1811                                    struct wpa_driver_scan_params *params)
1812 {
1813         struct i802_bss *bss = priv;
1814         struct wpa_driver_nl80211_data *drv = bss->drv;
1815         int ret = 0, timeout;
1816         struct nl_msg *msg, *ssids, *freqs;
1817         size_t i;
1818
1819         msg = nlmsg_alloc();
1820         ssids = nlmsg_alloc();
1821         freqs = nlmsg_alloc();
1822         if (!msg || !ssids || !freqs) {
1823                 nlmsg_free(msg);
1824                 nlmsg_free(ssids);
1825                 nlmsg_free(freqs);
1826                 return -1;
1827         }
1828
1829         os_free(drv->filter_ssids);
1830         drv->filter_ssids = params->filter_ssids;
1831         params->filter_ssids = NULL;
1832         drv->num_filter_ssids = params->num_filter_ssids;
1833
1834         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1835                     NL80211_CMD_TRIGGER_SCAN, 0);
1836
1837         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1838
1839         for (i = 0; i < params->num_ssids; i++) {
1840                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
1841                                   params->ssids[i].ssid,
1842                                   params->ssids[i].ssid_len);
1843                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1844                         params->ssids[i].ssid);
1845         }
1846         if (params->num_ssids)
1847                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1848
1849         if (params->extra_ies) {
1850                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
1851                                   params->extra_ies, params->extra_ies_len);
1852                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1853                         params->extra_ies);
1854         }
1855
1856         if (params->freqs) {
1857                 for (i = 0; params->freqs[i]; i++) {
1858                         wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
1859                                    "MHz", params->freqs[i]);
1860                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1861                 }
1862                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1863         }
1864
1865         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1866         msg = NULL;
1867         if (ret) {
1868                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1869                            "(%s)", ret, strerror(-ret));
1870 #ifdef HOSTAPD
1871                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1872                         /*
1873                          * mac80211 does not allow scan requests in AP mode, so
1874                          * try to do this in station mode.
1875                          */
1876                         if (wpa_driver_nl80211_set_mode(bss,
1877                                                         IEEE80211_MODE_INFRA))
1878                                 goto nla_put_failure;
1879
1880                         if (wpa_driver_nl80211_scan(drv, params)) {
1881                                 wpa_driver_nl80211_set_mode(bss,
1882                                                             IEEE80211_MODE_AP);
1883                                 goto nla_put_failure;
1884                         }
1885
1886                         /* Restore AP mode when processing scan results */
1887                         drv->ap_scan_as_station = 1;
1888                         ret = 0;
1889                 } else
1890                         goto nla_put_failure;
1891 #else /* HOSTAPD */
1892                 goto nla_put_failure;
1893 #endif /* HOSTAPD */
1894         }
1895
1896         /* Not all drivers generate "scan completed" wireless event, so try to
1897          * read results after a timeout. */
1898         timeout = 10;
1899         if (drv->scan_complete_events) {
1900                 /*
1901                  * The driver seems to deliver events to notify when scan is
1902                  * complete, so use longer timeout to avoid race conditions
1903                  * with scanning and following association request.
1904                  */
1905                 timeout = 30;
1906         }
1907         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1908                    "seconds", ret, timeout);
1909         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1910         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1911                                drv, drv->ctx);
1912
1913 nla_put_failure:
1914         nlmsg_free(ssids);
1915         nlmsg_free(msg);
1916         nlmsg_free(freqs);
1917         return ret;
1918 }
1919
1920
1921 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
1922 {
1923         const u8 *end, *pos;
1924
1925         if (ies == NULL)
1926                 return NULL;
1927
1928         pos = ies;
1929         end = ies + ies_len;
1930
1931         while (pos + 1 < end) {
1932                 if (pos + 2 + pos[1] > end)
1933                         break;
1934                 if (pos[0] == ie)
1935                         return pos;
1936                 pos += 2 + pos[1];
1937         }
1938
1939         return NULL;
1940 }
1941
1942
1943 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
1944                                  const u8 *ie, size_t ie_len)
1945 {
1946         const u8 *ssid;
1947         size_t i;
1948
1949         if (drv->filter_ssids == NULL)
1950                 return 0;
1951
1952         ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
1953         if (ssid == NULL)
1954                 return 1;
1955
1956         for (i = 0; i < drv->num_filter_ssids; i++) {
1957                 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
1958                     os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
1959                     0)
1960                         return 0;
1961         }
1962
1963         return 1;
1964 }
1965
1966
1967 struct nl80211_bss_info_arg {
1968         struct wpa_driver_nl80211_data *drv;
1969         struct wpa_scan_results *res;
1970 };
1971
1972 static int bss_info_handler(struct nl_msg *msg, void *arg)
1973 {
1974         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1975         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1976         struct nlattr *bss[NL80211_BSS_MAX + 1];
1977         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1978                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1979                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1980                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1981                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1982                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1983                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1984                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1985                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1986                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1987                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1988                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
1989         };
1990         struct nl80211_bss_info_arg *_arg = arg;
1991         struct wpa_scan_results *res = _arg->res;
1992         struct wpa_scan_res **tmp;
1993         struct wpa_scan_res *r;
1994         const u8 *ie, *beacon_ie;
1995         size_t ie_len, beacon_ie_len;
1996         u8 *pos;
1997
1998         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1999                   genlmsg_attrlen(gnlh, 0), NULL);
2000         if (!tb[NL80211_ATTR_BSS])
2001                 return NL_SKIP;
2002         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2003                              bss_policy))
2004                 return NL_SKIP;
2005         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
2006                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2007                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2008         } else {
2009                 ie = NULL;
2010                 ie_len = 0;
2011         }
2012         if (bss[NL80211_BSS_BEACON_IES]) {
2013                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
2014                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
2015         } else {
2016                 beacon_ie = NULL;
2017                 beacon_ie_len = 0;
2018         }
2019
2020         if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
2021                                   ie ? ie_len : beacon_ie_len))
2022                 return NL_SKIP;
2023
2024         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
2025         if (r == NULL)
2026                 return NL_SKIP;
2027         if (bss[NL80211_BSS_BSSID])
2028                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
2029                           ETH_ALEN);
2030         if (bss[NL80211_BSS_FREQUENCY])
2031                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2032         if (bss[NL80211_BSS_BEACON_INTERVAL])
2033                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
2034         if (bss[NL80211_BSS_CAPABILITY])
2035                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2036         r->flags |= WPA_SCAN_NOISE_INVALID;
2037         if (bss[NL80211_BSS_SIGNAL_MBM]) {
2038                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
2039                 r->level /= 100; /* mBm to dBm */
2040                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
2041         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
2042                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
2043                 r->flags |= WPA_SCAN_LEVEL_INVALID;
2044         } else
2045                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
2046         if (bss[NL80211_BSS_TSF])
2047                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
2048         if (bss[NL80211_BSS_SEEN_MS_AGO])
2049                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
2050         r->ie_len = ie_len;
2051         pos = (u8 *) (r + 1);
2052         if (ie) {
2053                 os_memcpy(pos, ie, ie_len);
2054                 pos += ie_len;
2055         }
2056         r->beacon_ie_len = beacon_ie_len;
2057         if (beacon_ie)
2058                 os_memcpy(pos, beacon_ie, beacon_ie_len);
2059
2060         if (bss[NL80211_BSS_STATUS]) {
2061                 enum nl80211_bss_status status;
2062                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
2063                 switch (status) {
2064                 case NL80211_BSS_STATUS_AUTHENTICATED:
2065                         r->flags |= WPA_SCAN_AUTHENTICATED;
2066                         break;
2067                 case NL80211_BSS_STATUS_ASSOCIATED:
2068                         r->flags |= WPA_SCAN_ASSOCIATED;
2069                         break;
2070                 default:
2071                         break;
2072                 }
2073         }
2074
2075         tmp = os_realloc(res->res,
2076                          (res->num + 1) * sizeof(struct wpa_scan_res *));
2077         if (tmp == NULL) {
2078                 os_free(r);
2079                 return NL_SKIP;
2080         }
2081         tmp[res->num++] = r;
2082         res->res = tmp;
2083
2084         return NL_SKIP;
2085 }
2086
2087
2088 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
2089                                  const u8 *addr)
2090 {
2091         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
2092                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
2093                            "mismatch (" MACSTR ")", MAC2STR(addr));
2094                 wpa_driver_nl80211_mlme(drv, addr,
2095                                         NL80211_CMD_DEAUTHENTICATE,
2096                                         WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
2097         }
2098 }
2099
2100
2101 static void wpa_driver_nl80211_check_bss_status(
2102         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
2103 {
2104         size_t i;
2105
2106         for (i = 0; i < res->num; i++) {
2107                 struct wpa_scan_res *r = res->res[i];
2108                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
2109                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2110                                    "indicates BSS status with " MACSTR
2111                                    " as authenticated",
2112                                    MAC2STR(r->bssid));
2113                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2114                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
2115                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
2116                             0) {
2117                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
2118                                            " in local state (auth=" MACSTR
2119                                            " assoc=" MACSTR ")",
2120                                            MAC2STR(drv->auth_bssid),
2121                                            MAC2STR(drv->bssid));
2122                                 clear_state_mismatch(drv, r->bssid);
2123                         }
2124                 }
2125
2126                 if (r->flags & WPA_SCAN_ASSOCIATED) {
2127                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2128                                    "indicate BSS status with " MACSTR
2129                                    " as associated",
2130                                    MAC2STR(r->bssid));
2131                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2132                             !drv->associated) {
2133                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2134                                            "(not associated) does not match "
2135                                            "with BSS state");
2136                                 clear_state_mismatch(drv, r->bssid);
2137                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
2138                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
2139                                    0) {
2140                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2141                                            "(associated with " MACSTR ") does "
2142                                            "not match with BSS state",
2143                                            MAC2STR(drv->bssid));
2144                                 clear_state_mismatch(drv, r->bssid);
2145                                 clear_state_mismatch(drv, drv->bssid);
2146                         }
2147                 }
2148         }
2149 }
2150
2151
2152 static void wpa_scan_results_free(struct wpa_scan_results *res)
2153 {
2154         size_t i;
2155
2156         if (res == NULL)
2157                 return;
2158
2159         for (i = 0; i < res->num; i++)
2160                 os_free(res->res[i]);
2161         os_free(res->res);
2162         os_free(res);
2163 }
2164
2165
2166 static struct wpa_scan_results *
2167 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
2168 {
2169         struct nl_msg *msg;
2170         struct wpa_scan_results *res;
2171         int ret;
2172         struct nl80211_bss_info_arg arg;
2173
2174         res = os_zalloc(sizeof(*res));
2175         if (res == NULL)
2176                 return NULL;
2177         msg = nlmsg_alloc();
2178         if (!msg)
2179                 goto nla_put_failure;
2180
2181         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
2182                     NL80211_CMD_GET_SCAN, 0);
2183         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2184
2185         arg.drv = drv;
2186         arg.res = res;
2187         ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
2188         msg = NULL;
2189         if (ret == 0) {
2190                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
2191                            (unsigned long) res->num);
2192                 return res;
2193         }
2194         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
2195                    "(%s)", ret, strerror(-ret));
2196 nla_put_failure:
2197         nlmsg_free(msg);
2198         wpa_scan_results_free(res);
2199         return NULL;
2200 }
2201
2202
2203 /**
2204  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
2205  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2206  * Returns: Scan results on success, -1 on failure
2207  */
2208 static struct wpa_scan_results *
2209 wpa_driver_nl80211_get_scan_results(void *priv)
2210 {
2211         struct i802_bss *bss = priv;
2212         struct wpa_driver_nl80211_data *drv = bss->drv;
2213         struct wpa_scan_results *res;
2214
2215         res = nl80211_get_scan_results(drv);
2216         if (res)
2217                 wpa_driver_nl80211_check_bss_status(drv, res);
2218         return res;
2219 }
2220
2221
2222 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
2223 {
2224         struct wpa_scan_results *res;
2225         size_t i;
2226
2227         res = nl80211_get_scan_results(drv);
2228         if (res == NULL) {
2229                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
2230                 return;
2231         }
2232
2233         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
2234         for (i = 0; i < res->num; i++) {
2235                 struct wpa_scan_res *r = res->res[i];
2236                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
2237                            (int) i, (int) res->num, MAC2STR(r->bssid),
2238                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
2239                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
2240         }
2241
2242         wpa_scan_results_free(res);
2243 }
2244
2245
2246 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
2247                                       enum wpa_alg alg, const u8 *addr,
2248                                       int key_idx, int set_tx,
2249                                       const u8 *seq, size_t seq_len,
2250                                       const u8 *key, size_t key_len)
2251 {
2252         struct i802_bss *bss = priv;
2253         struct wpa_driver_nl80211_data *drv = bss->drv;
2254         int ifindex = if_nametoindex(ifname);
2255         struct nl_msg *msg;
2256         int ret;
2257
2258         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
2259                    "set_tx=%d seq_len=%lu key_len=%lu",
2260                    __func__, ifindex, alg, addr, key_idx, set_tx,
2261                    (unsigned long) seq_len, (unsigned long) key_len);
2262
2263         msg = nlmsg_alloc();
2264         if (!msg)
2265                 return -ENOMEM;
2266
2267         if (alg == WPA_ALG_NONE) {
2268                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2269                             0, NL80211_CMD_DEL_KEY, 0);
2270         } else {
2271                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2272                             0, NL80211_CMD_NEW_KEY, 0);
2273                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2274                 switch (alg) {
2275                 case WPA_ALG_WEP:
2276                         if (key_len == 5)
2277                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2278                                             WLAN_CIPHER_SUITE_WEP40);
2279                         else
2280                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2281                                             WLAN_CIPHER_SUITE_WEP104);
2282                         break;
2283                 case WPA_ALG_TKIP:
2284                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2285                                     WLAN_CIPHER_SUITE_TKIP);
2286                         break;
2287                 case WPA_ALG_CCMP:
2288                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2289                                     WLAN_CIPHER_SUITE_CCMP);
2290                         break;
2291                 case WPA_ALG_IGTK:
2292                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2293                                     WLAN_CIPHER_SUITE_AES_CMAC);
2294                         break;
2295                 default:
2296                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2297                                    "algorithm %d", __func__, alg);
2298                         nlmsg_free(msg);
2299                         return -1;
2300                 }
2301         }
2302
2303         if (seq && seq_len)
2304                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
2305
2306         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2307         {
2308                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
2309                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2310         }
2311         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2312         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2313
2314         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2315         if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
2316                 ret = 0;
2317         if (ret)
2318                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2319                            ret, strerror(-ret));
2320
2321         /*
2322          * If we failed or don't need to set the default TX key (below),
2323          * we're done here.
2324          */
2325         if (ret || !set_tx || alg == WPA_ALG_NONE)
2326                 return ret;
2327 #ifdef HOSTAPD
2328         if (addr)
2329                 return ret;
2330 #else /* HOSTAPD */
2331         if (drv->nlmode == NL80211_IFTYPE_AP && addr)
2332                 return ret;
2333 #endif /* HOSTAPD */
2334
2335         msg = nlmsg_alloc();
2336         if (!msg)
2337                 return -ENOMEM;
2338
2339         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2340                     0, NL80211_CMD_SET_KEY, 0);
2341         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2342         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2343         if (alg == WPA_ALG_IGTK)
2344                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2345         else
2346                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2347
2348         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2349         if (ret == -ENOENT)
2350                 ret = 0;
2351         if (ret)
2352                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2353                            "err=%d %s)", ret, strerror(-ret));
2354         return ret;
2355
2356 nla_put_failure:
2357         return -ENOBUFS;
2358 }
2359
2360
2361 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2362                       int key_idx, int defkey,
2363                       const u8 *seq, size_t seq_len,
2364                       const u8 *key, size_t key_len)
2365 {
2366         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2367         if (!key_attr)
2368                 return -1;
2369
2370         if (defkey && alg == WPA_ALG_IGTK)
2371                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2372         else if (defkey)
2373                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2374
2375         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2376
2377         switch (alg) {
2378         case WPA_ALG_WEP:
2379                 if (key_len == 5)
2380                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2381                                     WLAN_CIPHER_SUITE_WEP40);
2382                 else
2383                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2384                                     WLAN_CIPHER_SUITE_WEP104);
2385                 break;
2386         case WPA_ALG_TKIP:
2387                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2388                 break;
2389         case WPA_ALG_CCMP:
2390                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2391                 break;
2392         case WPA_ALG_IGTK:
2393                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2394                             WLAN_CIPHER_SUITE_AES_CMAC);
2395                 break;
2396         default:
2397                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2398                            "algorithm %d", __func__, alg);
2399                 return -1;
2400         }
2401
2402         if (seq && seq_len)
2403                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2404
2405         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2406
2407         nla_nest_end(msg, key_attr);
2408
2409         return 0;
2410  nla_put_failure:
2411         return -1;
2412 }
2413
2414
2415 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2416                                  struct nl_msg *msg)
2417 {
2418         int i, privacy = 0;
2419         struct nlattr *nl_keys, *nl_key;
2420
2421         for (i = 0; i < 4; i++) {
2422                 if (!params->wep_key[i])
2423                         continue;
2424                 privacy = 1;
2425                 break;
2426         }
2427         if (!privacy)
2428                 return 0;
2429
2430         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2431
2432         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2433         if (!nl_keys)
2434                 goto nla_put_failure;
2435
2436         for (i = 0; i < 4; i++) {
2437                 if (!params->wep_key[i])
2438                         continue;
2439
2440                 nl_key = nla_nest_start(msg, i);
2441                 if (!nl_key)
2442                         goto nla_put_failure;
2443
2444                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2445                         params->wep_key[i]);
2446                 if (params->wep_key_len[i] == 5)
2447                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2448                                     WLAN_CIPHER_SUITE_WEP40);
2449                 else
2450                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2451                                     WLAN_CIPHER_SUITE_WEP104);
2452
2453                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2454
2455                 if (i == params->wep_tx_keyidx)
2456                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2457
2458                 nla_nest_end(msg, nl_key);
2459         }
2460         nla_nest_end(msg, nl_keys);
2461
2462         return 0;
2463
2464 nla_put_failure:
2465         return -ENOBUFS;
2466 }
2467
2468
2469 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2470                                    const u8 *addr, int cmd, u16 reason_code,
2471                                    int local_state_change)
2472 {
2473         int ret = -1;
2474         struct nl_msg *msg;
2475
2476         msg = nlmsg_alloc();
2477         if (!msg)
2478                 return -1;
2479
2480         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2481
2482         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2483         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2484         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2485         if (local_state_change)
2486                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2487
2488         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2489         msg = NULL;
2490         if (ret) {
2491                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2492                            "(%s)", ret, strerror(-ret));
2493                 goto nla_put_failure;
2494         }
2495         ret = 0;
2496
2497 nla_put_failure:
2498         nlmsg_free(msg);
2499         return ret;
2500 }
2501
2502
2503 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2504                                          const u8 *addr, int reason_code)
2505 {
2506         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2507                    __func__, MAC2STR(addr), reason_code);
2508         drv->associated = 0;
2509         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2510                                        reason_code, 0);
2511 }
2512
2513
2514 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2515                                              int reason_code)
2516 {
2517         struct i802_bss *bss = priv;
2518         struct wpa_driver_nl80211_data *drv = bss->drv;
2519         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2520                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2521         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2522                    __func__, MAC2STR(addr), reason_code);
2523         drv->associated = 0;
2524         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2525                                        reason_code, 0);
2526 }
2527
2528
2529 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2530                                            int reason_code)
2531 {
2532         struct i802_bss *bss = priv;
2533         struct wpa_driver_nl80211_data *drv = bss->drv;
2534         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2535                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2536         wpa_printf(MSG_DEBUG, "%s", __func__);
2537         drv->associated = 0;
2538         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2539                                        reason_code, 0);
2540 }
2541
2542
2543 static int wpa_driver_nl80211_authenticate(
2544         void *priv, struct wpa_driver_auth_params *params)
2545 {
2546         struct i802_bss *bss = priv;
2547         struct wpa_driver_nl80211_data *drv = bss->drv;
2548         int ret = -1, i;
2549         struct nl_msg *msg;
2550         enum nl80211_auth_type type;
2551         int count = 0;
2552
2553         drv->associated = 0;
2554         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2555         /* FIX: IBSS mode */
2556         if (drv->nlmode != NL80211_IFTYPE_STATION)
2557                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2558
2559         if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2560                 return -1;
2561
2562 retry:
2563         msg = nlmsg_alloc();
2564         if (!msg)
2565                 return -1;
2566
2567         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2568                    drv->ifindex);
2569
2570         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2571                     NL80211_CMD_AUTHENTICATE, 0);
2572
2573         for (i = 0; i < 4; i++) {
2574                 if (!params->wep_key[i])
2575                         continue;
2576                 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
2577                                            NULL, i,
2578                                            i == params->wep_tx_keyidx, NULL, 0,
2579                                            params->wep_key[i],
2580                                            params->wep_key_len[i]);
2581                 if (params->wep_tx_keyidx != i)
2582                         continue;
2583                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2584                                params->wep_key[i], params->wep_key_len[i])) {
2585                         nlmsg_free(msg);
2586                         return -1;
2587                 }
2588         }
2589
2590         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2591         if (params->bssid) {
2592                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2593                            MAC2STR(params->bssid));
2594                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2595         }
2596         if (params->freq) {
2597                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2598                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2599         }
2600         if (params->ssid) {
2601                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2602                                   params->ssid, params->ssid_len);
2603                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2604                         params->ssid);
2605         }
2606         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2607         if (params->ie)
2608                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2609         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2610                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2611         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2612                 type = NL80211_AUTHTYPE_SHARED_KEY;
2613         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2614                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2615         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2616                 type = NL80211_AUTHTYPE_FT;
2617         else
2618                 goto nla_put_failure;
2619         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2620         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2621         if (params->local_state_change) {
2622                 wpa_printf(MSG_DEBUG, "  * Local state change only");
2623                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2624         }
2625
2626         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2627         msg = NULL;
2628         if (ret) {
2629                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2630                            "(%s)", ret, strerror(-ret));
2631                 count++;
2632                 if (ret == -EALREADY && count == 1 && params->bssid &&
2633                     !params->local_state_change) {
2634                         /*
2635                          * mac80211 does not currently accept new
2636                          * authentication if we are already authenticated. As a
2637                          * workaround, force deauthentication and try again.
2638                          */
2639                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2640                                    "after forced deauthentication");
2641                         wpa_driver_nl80211_deauthenticate(
2642                                 bss, params->bssid,
2643                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2644                         nlmsg_free(msg);
2645                         goto retry;
2646                 }
2647                 goto nla_put_failure;
2648         }
2649         ret = 0;
2650         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2651                    "successfully");
2652
2653 nla_put_failure:
2654         nlmsg_free(msg);
2655         return ret;
2656 }
2657
2658
2659 struct phy_info_arg {
2660         u16 *num_modes;
2661         struct hostapd_hw_modes *modes;
2662 };
2663
2664 static int phy_info_handler(struct nl_msg *msg, void *arg)
2665 {
2666         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2667         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2668         struct phy_info_arg *phy_info = arg;
2669
2670         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2671
2672         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2673         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2674                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2675                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2676                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2677                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2678                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2679                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2680         };
2681
2682         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2683         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2684                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2685                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2686         };
2687
2688         struct nlattr *nl_band;
2689         struct nlattr *nl_freq;
2690         struct nlattr *nl_rate;
2691         int rem_band, rem_freq, rem_rate;
2692         struct hostapd_hw_modes *mode;
2693         int idx, mode_is_set;
2694
2695         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2696                   genlmsg_attrlen(gnlh, 0), NULL);
2697
2698         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2699                 return NL_SKIP;
2700
2701         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2702                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2703                 if (!mode)
2704                         return NL_SKIP;
2705                 phy_info->modes = mode;
2706
2707                 mode_is_set = 0;
2708
2709                 mode = &phy_info->modes[*(phy_info->num_modes)];
2710                 memset(mode, 0, sizeof(*mode));
2711                 *(phy_info->num_modes) += 1;
2712
2713                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2714                           nla_len(nl_band), NULL);
2715
2716                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2717                         mode->ht_capab = nla_get_u16(
2718                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2719                 }
2720
2721                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2722                         mode->a_mpdu_params |= nla_get_u8(
2723                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2724                                 0x03;
2725                 }
2726
2727                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2728                         mode->a_mpdu_params |= nla_get_u8(
2729                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2730                                 2;
2731                 }
2732
2733                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2734                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2735                         u8 *mcs;
2736                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2737                         os_memcpy(mode->mcs_set, mcs, 16);
2738                 }
2739
2740                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2741                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2742                                   nla_len(nl_freq), freq_policy);
2743                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2744                                 continue;
2745                         mode->num_channels++;
2746                 }
2747
2748                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2749                 if (!mode->channels)
2750                         return NL_SKIP;
2751
2752                 idx = 0;
2753
2754                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2755                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2756                                   nla_len(nl_freq), freq_policy);
2757                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2758                                 continue;
2759
2760                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2761                         mode->channels[idx].flag = 0;
2762
2763                         if (!mode_is_set) {
2764                                 /* crude heuristic */
2765                                 if (mode->channels[idx].freq < 4000)
2766                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2767                                 else
2768                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2769                                 mode_is_set = 1;
2770                         }
2771
2772                         /* crude heuristic */
2773                         if (mode->channels[idx].freq < 4000)
2774                                 if (mode->channels[idx].freq == 2484)
2775                                         mode->channels[idx].chan = 14;
2776                                 else
2777                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2778                         else
2779                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2780
2781                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2782                                 mode->channels[idx].flag |=
2783                                         HOSTAPD_CHAN_DISABLED;
2784                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2785                                 mode->channels[idx].flag |=
2786                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2787                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2788                                 mode->channels[idx].flag |=
2789                                         HOSTAPD_CHAN_NO_IBSS;
2790                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2791                                 mode->channels[idx].flag |=
2792                                         HOSTAPD_CHAN_RADAR;
2793
2794                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2795                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2796                                 mode->channels[idx].max_tx_power =
2797                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2798
2799                         idx++;
2800                 }
2801
2802                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2803                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2804                                   nla_len(nl_rate), rate_policy);
2805                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2806                                 continue;
2807                         mode->num_rates++;
2808                 }
2809
2810                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2811                 if (!mode->rates)
2812                         return NL_SKIP;
2813
2814                 idx = 0;
2815
2816                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2817                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2818                                   nla_len(nl_rate), rate_policy);
2819                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2820                                 continue;
2821                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2822
2823                         /* crude heuristic */
2824                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2825                             mode->rates[idx] > 200)
2826                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2827
2828                         idx++;
2829                 }
2830         }
2831
2832         return NL_SKIP;
2833 }
2834
2835 static struct hostapd_hw_modes *
2836 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2837 {
2838         u16 m;
2839         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2840         int i, mode11g_idx = -1;
2841
2842         /* If only 802.11g mode is included, use it to construct matching
2843          * 802.11b mode data. */
2844
2845         for (m = 0; m < *num_modes; m++) {
2846                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2847                         return modes; /* 802.11b already included */
2848                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2849                         mode11g_idx = m;
2850         }
2851
2852         if (mode11g_idx < 0)
2853                 return modes; /* 2.4 GHz band not supported at all */
2854
2855         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2856         if (nmodes == NULL)
2857                 return modes; /* Could not add 802.11b mode */
2858
2859         mode = &nmodes[*num_modes];
2860         os_memset(mode, 0, sizeof(*mode));
2861         (*num_modes)++;
2862         modes = nmodes;
2863
2864         mode->mode = HOSTAPD_MODE_IEEE80211B;
2865
2866         mode11g = &modes[mode11g_idx];
2867         mode->num_channels = mode11g->num_channels;
2868         mode->channels = os_malloc(mode11g->num_channels *
2869                                    sizeof(struct hostapd_channel_data));
2870         if (mode->channels == NULL) {
2871                 (*num_modes)--;
2872                 return modes; /* Could not add 802.11b mode */
2873         }
2874         os_memcpy(mode->channels, mode11g->channels,
2875                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2876
2877         mode->num_rates = 0;
2878         mode->rates = os_malloc(4 * sizeof(int));
2879         if (mode->rates == NULL) {
2880                 os_free(mode->channels);
2881                 (*num_modes)--;
2882                 return modes; /* Could not add 802.11b mode */
2883         }
2884
2885         for (i = 0; i < mode11g->num_rates; i++) {
2886                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2887                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2888                         continue;
2889                 mode->rates[mode->num_rates] = mode11g->rates[i];
2890                 mode->num_rates++;
2891                 if (mode->num_rates == 4)
2892                         break;
2893         }
2894
2895         if (mode->num_rates == 0) {
2896                 os_free(mode->channels);
2897                 os_free(mode->rates);
2898                 (*num_modes)--;
2899                 return modes; /* No 802.11b rates */
2900         }
2901
2902         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2903                    "information");
2904
2905         return modes;
2906 }
2907
2908
2909 static struct hostapd_hw_modes *
2910 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2911 {
2912         struct i802_bss *bss = priv;
2913         struct wpa_driver_nl80211_data *drv = bss->drv;
2914         struct nl_msg *msg;
2915         struct phy_info_arg result = {
2916                 .num_modes = num_modes,
2917                 .modes = NULL,
2918         };
2919
2920         *num_modes = 0;
2921         *flags = 0;
2922
2923         msg = nlmsg_alloc();
2924         if (!msg)
2925                 return NULL;
2926
2927         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2928                     0, NL80211_CMD_GET_WIPHY, 0);
2929
2930         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2931
2932         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2933                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2934  nla_put_failure:
2935         return NULL;
2936 }
2937
2938
2939 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2940                                          const void *data, size_t len,
2941                                          int encrypt)
2942 {
2943         __u8 rtap_hdr[] = {
2944                 0x00, 0x00, /* radiotap version */
2945                 0x0e, 0x00, /* radiotap length */
2946                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2947                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2948                 0x00,       /* padding */
2949                 0x00, 0x00, /* RX and TX flags to indicate that */
2950                 0x00, 0x00, /* this is the injected frame directly */
2951         };
2952         struct iovec iov[2] = {
2953                 {
2954                         .iov_base = &rtap_hdr,
2955                         .iov_len = sizeof(rtap_hdr),
2956                 },
2957                 {
2958                         .iov_base = (void *) data,
2959                         .iov_len = len,
2960                 }
2961         };
2962         struct msghdr msg = {
2963                 .msg_name = NULL,
2964                 .msg_namelen = 0,
2965                 .msg_iov = iov,
2966                 .msg_iovlen = 2,
2967                 .msg_control = NULL,
2968                 .msg_controllen = 0,
2969                 .msg_flags = 0,
2970         };
2971
2972         if (encrypt)
2973                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2974
2975         return sendmsg(drv->monitor_sock, &msg, 0);
2976 }
2977
2978
2979 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2980                                         size_t data_len)
2981 {
2982         struct i802_bss *bss = priv;
2983         struct wpa_driver_nl80211_data *drv = bss->drv;
2984         struct ieee80211_mgmt *mgmt;
2985         int encrypt = 1;
2986         u16 fc;
2987
2988         mgmt = (struct ieee80211_mgmt *) data;
2989         fc = le_to_host16(mgmt->frame_control);
2990
2991         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2992             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2993                 /*
2994                  * Only one of the authentication frame types is encrypted.
2995                  * In order for static WEP encryption to work properly (i.e.,
2996                  * to not encrypt the frame), we need to tell mac80211 about
2997                  * the frames that must not be encrypted.
2998                  */
2999                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
3000                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
3001                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
3002                         encrypt = 0;
3003         }
3004
3005         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
3006 }
3007
3008
3009 static int wpa_driver_nl80211_set_beacon(void *priv,
3010                                          const u8 *head, size_t head_len,
3011                                          const u8 *tail, size_t tail_len,
3012                                          int dtim_period, int beacon_int)
3013 {
3014         struct i802_bss *bss = priv;
3015         struct wpa_driver_nl80211_data *drv = bss->drv;
3016         struct nl_msg *msg;
3017         u8 cmd = NL80211_CMD_NEW_BEACON;
3018         int ret;
3019         int beacon_set;
3020         int ifindex = if_nametoindex(bss->ifname);
3021
3022         beacon_set = bss->beacon_set;
3023
3024         msg = nlmsg_alloc();
3025         if (!msg)
3026                 return -ENOMEM;
3027
3028         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
3029                    beacon_set);
3030         if (beacon_set)
3031                 cmd = NL80211_CMD_SET_BEACON;
3032
3033         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3034                     0, cmd, 0);
3035         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3036         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3037         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3038         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
3039         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3040
3041         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3042         if (ret) {
3043                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
3044                            ret, strerror(-ret));
3045         } else {
3046                 bss->beacon_set = 1;
3047         }
3048         return ret;
3049  nla_put_failure:
3050         return -ENOBUFS;
3051 }
3052
3053
3054 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
3055                                        int freq, int ht_enabled,
3056                                        int sec_channel_offset)
3057 {
3058         struct nl_msg *msg;
3059         int ret;
3060
3061         msg = nlmsg_alloc();
3062         if (!msg)
3063                 return -1;
3064
3065         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3066                     NL80211_CMD_SET_WIPHY, 0);
3067
3068         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3069         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
3070         if (ht_enabled) {
3071                 switch (sec_channel_offset) {
3072                 case -1:
3073                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3074                                     NL80211_CHAN_HT40MINUS);
3075                         break;
3076                 case 1:
3077                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3078                                     NL80211_CHAN_HT40PLUS);
3079                         break;
3080                 default:
3081                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3082                                     NL80211_CHAN_HT20);
3083                         break;
3084                 }
3085         }
3086
3087         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3088         if (ret == 0)
3089                 return 0;
3090         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
3091                    "%d (%s)", freq, ret, strerror(-ret));
3092 nla_put_failure:
3093         return -1;
3094 }
3095
3096
3097 static int wpa_driver_nl80211_sta_add(void *priv,
3098                                       struct hostapd_sta_add_params *params)
3099 {
3100         struct i802_bss *bss = priv;
3101         struct wpa_driver_nl80211_data *drv = bss->drv;
3102         struct nl_msg *msg;
3103         int ret = -ENOBUFS;
3104
3105         msg = nlmsg_alloc();
3106         if (!msg)
3107                 return -ENOMEM;
3108
3109         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3110                     0, NL80211_CMD_NEW_STATION, 0);
3111
3112         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
3113         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3114         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3115         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3116                 params->supp_rates);
3117         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3118                     params->listen_interval);
3119         if (params->ht_capabilities) {
3120                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3121                         sizeof(*params->ht_capabilities),
3122                         params->ht_capabilities);
3123         }
3124
3125         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3126         if (ret)
3127                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3128                            "result: %d (%s)", ret, strerror(-ret));
3129         if (ret == -EEXIST)
3130                 ret = 0;
3131  nla_put_failure:
3132         return ret;
3133 }
3134
3135
3136 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
3137 {
3138         struct i802_bss *bss = priv;
3139         struct wpa_driver_nl80211_data *drv = bss->drv;
3140         struct nl_msg *msg;
3141         int ret;
3142
3143         msg = nlmsg_alloc();
3144         if (!msg)
3145                 return -ENOMEM;
3146
3147         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3148                     0, NL80211_CMD_DEL_STATION, 0);
3149
3150         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3151                     if_nametoindex(bss->ifname));
3152         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3153
3154         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3155         if (ret == -ENOENT)
3156                 return 0;
3157         return ret;
3158  nla_put_failure:
3159         return -ENOBUFS;
3160 }
3161
3162
3163 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
3164                                  int ifidx)
3165 {
3166         struct nl_msg *msg;
3167
3168         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
3169
3170 #ifdef HOSTAPD
3171         /* stop listening for EAPOL on this interface */
3172         del_ifidx(drv, ifidx);
3173 #endif /* HOSTAPD */
3174
3175         msg = nlmsg_alloc();
3176         if (!msg)
3177                 goto nla_put_failure;
3178
3179         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3180                     0, NL80211_CMD_DEL_INTERFACE, 0);
3181         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3182
3183         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3184                 return;
3185  nla_put_failure:
3186         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
3187 }
3188
3189
3190 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
3191                                      const char *ifname,
3192                                      enum nl80211_iftype iftype,
3193                                      const u8 *addr, int wds)
3194 {
3195         struct nl_msg *msg, *flags = NULL;
3196         int ifidx;
3197         int ret = -ENOBUFS;
3198
3199         msg = nlmsg_alloc();
3200         if (!msg)
3201                 return -1;
3202
3203         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3204                     0, NL80211_CMD_NEW_INTERFACE, 0);
3205         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3206         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3207         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3208
3209         if (iftype == NL80211_IFTYPE_MONITOR) {
3210                 int err;
3211
3212                 flags = nlmsg_alloc();
3213                 if (!flags)
3214                         goto nla_put_failure;
3215
3216                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3217
3218                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3219
3220                 nlmsg_free(flags);
3221
3222                 if (err)
3223                         goto nla_put_failure;
3224         } else if (wds) {
3225                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
3226         }
3227
3228         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3229         if (ret) {
3230  nla_put_failure:
3231                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
3232                            ifname, ret, strerror(-ret));
3233                 return ret;
3234         }
3235
3236         ifidx = if_nametoindex(ifname);
3237         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
3238                    ifname, ifidx);
3239
3240         if (ifidx <= 0)
3241                 return -1;
3242
3243 #ifdef HOSTAPD
3244         /* start listening for EAPOL on this interface */
3245         add_ifidx(drv, ifidx);
3246 #endif /* HOSTAPD */
3247
3248         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
3249             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
3250                 nl80211_remove_iface(drv, ifidx);
3251                 return -1;
3252         }
3253
3254         return ifidx;
3255 }
3256
3257
3258 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3259                                 const char *ifname, enum nl80211_iftype iftype,
3260                                 const u8 *addr, int wds)
3261 {
3262         int ret;
3263
3264         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
3265
3266         /* if error occured and interface exists already */
3267         if (ret == -ENFILE && if_nametoindex(ifname)) {
3268                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
3269
3270                 /* Try to remove the interface that was already there. */
3271                 nl80211_remove_iface(drv, if_nametoindex(ifname));
3272
3273                 /* Try to create the interface again */
3274                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
3275                                                 wds);
3276         }
3277
3278         if (ret >= 0 && drv->disable_11b_rates)
3279                 nl80211_disable_11b_rates(drv, ret, 1);
3280
3281         return ret;
3282 }
3283
3284
3285 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
3286 {
3287         struct ieee80211_hdr *hdr;
3288         u16 fc;
3289         union wpa_event_data event;
3290
3291         hdr = (struct ieee80211_hdr *) buf;
3292         fc = le_to_host16(hdr->frame_control);
3293
3294         os_memset(&event, 0, sizeof(event));
3295         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
3296         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
3297         event.tx_status.dst = hdr->addr1;
3298         event.tx_status.data = buf;
3299         event.tx_status.data_len = len;
3300         event.tx_status.ack = ok;
3301         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
3302 }
3303
3304
3305 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
3306                              u8 *buf, size_t len)
3307 {
3308         union wpa_event_data event;
3309         os_memset(&event, 0, sizeof(event));
3310         event.rx_from_unknown.frame = buf;
3311         event.rx_from_unknown.len = len;
3312         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
3313 }
3314
3315
3316 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3317                          u8 *buf, size_t len, int datarate, int ssi_signal)
3318 {
3319         struct ieee80211_hdr *hdr;
3320         u16 fc;
3321         union wpa_event_data event;
3322
3323         hdr = (struct ieee80211_hdr *) buf;
3324         fc = le_to_host16(hdr->frame_control);
3325
3326         switch (WLAN_FC_GET_TYPE(fc)) {
3327         case WLAN_FC_TYPE_MGMT:
3328                 os_memset(&event, 0, sizeof(event));
3329                 event.rx_mgmt.frame = buf;
3330                 event.rx_mgmt.frame_len = len;
3331                 event.rx_mgmt.datarate = datarate;
3332                 event.rx_mgmt.ssi_signal = ssi_signal;
3333                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3334                 break;
3335         case WLAN_FC_TYPE_CTRL:
3336                 /* can only get here with PS-Poll frames */
3337                 wpa_printf(MSG_DEBUG, "CTRL");
3338                 from_unknown_sta(drv, buf, len);
3339                 break;
3340         case WLAN_FC_TYPE_DATA:
3341                 from_unknown_sta(drv, buf, len);
3342                 break;
3343         }
3344 }
3345
3346
3347 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3348 {
3349         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3350         int len;
3351         unsigned char buf[3000];
3352         struct ieee80211_radiotap_iterator iter;
3353         int ret;
3354         int datarate = 0, ssi_signal = 0;
3355         int injected = 0, failed = 0, rxflags = 0;
3356
3357         len = recv(sock, buf, sizeof(buf), 0);
3358         if (len < 0) {
3359                 perror("recv");
3360                 return;
3361         }
3362
3363         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3364                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3365                            "frame since Probe Request reporting is disabled");
3366                 return;
3367         }
3368
3369         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3370                 printf("received invalid radiotap frame\n");
3371                 return;
3372         }
3373
3374         while (1) {
3375                 ret = ieee80211_radiotap_iterator_next(&iter);
3376                 if (ret == -ENOENT)
3377                         break;
3378                 if (ret) {
3379                         printf("received invalid radiotap frame (%d)\n", ret);
3380                         return;
3381                 }
3382                 switch (iter.this_arg_index) {
3383                 case IEEE80211_RADIOTAP_FLAGS:
3384                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3385                                 len -= 4;
3386                         break;
3387                 case IEEE80211_RADIOTAP_RX_FLAGS:
3388                         rxflags = 1;
3389                         break;
3390                 case IEEE80211_RADIOTAP_TX_FLAGS:
3391                         injected = 1;
3392                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3393                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3394                         break;
3395                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3396                         break;
3397                 case IEEE80211_RADIOTAP_CHANNEL:
3398                         /* TODO: convert from freq/flags to channel number */
3399                         break;
3400                 case IEEE80211_RADIOTAP_RATE:
3401                         datarate = *iter.this_arg * 5;
3402                         break;
3403                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3404                         ssi_signal = *iter.this_arg;
3405                         break;
3406                 }
3407         }
3408
3409         if (rxflags && injected)
3410                 return;
3411
3412         if (!injected)
3413                 handle_frame(drv, buf + iter.max_length,
3414                              len - iter.max_length, datarate, ssi_signal);
3415         else
3416                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3417                                    len - iter.max_length, !failed);
3418 }
3419
3420
3421 /*
3422  * we post-process the filter code later and rewrite
3423  * this to the offset to the last instruction
3424  */
3425 #define PASS    0xFF
3426 #define FAIL    0xFE
3427
3428 static struct sock_filter msock_filter_insns[] = {
3429         /*
3430          * do a little-endian load of the radiotap length field
3431          */
3432         /* load lower byte into A */
3433         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3434         /* put it into X (== index register) */
3435         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3436         /* load upper byte into A */
3437         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3438         /* left-shift it by 8 */
3439         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3440         /* or with X */
3441         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3442         /* put result into X */
3443         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3444
3445         /*
3446          * Allow management frames through, this also gives us those
3447          * management frames that we sent ourselves with status
3448          */
3449         /* load the lower byte of the IEEE 802.11 frame control field */
3450         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3451         /* mask off frame type and version */
3452         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3453         /* accept frame if it's both 0, fall through otherwise */
3454         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3455
3456         /*
3457          * TODO: add a bit to radiotap RX flags that indicates
3458          * that the sending station is not associated, then
3459          * add a filter here that filters on our DA and that flag
3460          * to allow us to deauth frames to that bad station.
3461          *
3462          * Not a regression -- we didn't do it before either.
3463          */
3464
3465 #if 0
3466         /*
3467          * drop non-data frames
3468          */
3469         /* load the lower byte of the frame control field */
3470         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3471         /* mask off QoS bit */
3472         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3473         /* drop non-data frames */
3474         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3475 #endif
3476         /* load the upper byte of the frame control field */
3477         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3478         /* mask off toDS/fromDS */
3479         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3480         /* accept WDS frames */
3481         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3482
3483         /*
3484          * add header length to index
3485          */
3486         /* load the lower byte of the frame control field */
3487         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3488         /* mask off QoS bit */
3489         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3490         /* right shift it by 6 to give 0 or 2 */
3491         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3492         /* add data frame header length */
3493         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3494         /* add index, was start of 802.11 header */
3495         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3496         /* move to index, now start of LL header */
3497         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3498
3499         /*
3500          * Accept empty data frames, we use those for
3501          * polling activity.
3502          */
3503         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3504         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3505
3506         /*
3507          * Accept EAPOL frames
3508          */
3509         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3510         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3511         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3512         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3513
3514         /* keep these last two statements or change the code below */
3515         /* return 0 == "DROP" */
3516         BPF_STMT(BPF_RET | BPF_K, 0),
3517         /* return ~0 == "keep all" */
3518         BPF_STMT(BPF_RET | BPF_K, ~0),
3519 };
3520
3521 static struct sock_fprog msock_filter = {
3522         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3523         .filter = msock_filter_insns,
3524 };
3525
3526
3527 static int add_monitor_filter(int s)
3528 {
3529         int idx;
3530
3531         /* rewrite all PASS/FAIL jump offsets */
3532         for (idx = 0; idx < msock_filter.len; idx++) {
3533                 struct sock_filter *insn = &msock_filter_insns[idx];
3534
3535                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3536                         if (insn->code == (BPF_JMP|BPF_JA)) {
3537                                 if (insn->k == PASS)
3538                                         insn->k = msock_filter.len - idx - 2;
3539                                 else if (insn->k == FAIL)
3540                                         insn->k = msock_filter.len - idx - 3;
3541                         }
3542
3543                         if (insn->jt == PASS)
3544                                 insn->jt = msock_filter.len - idx - 2;
3545                         else if (insn->jt == FAIL)
3546                                 insn->jt = msock_filter.len - idx - 3;
3547
3548                         if (insn->jf == PASS)
3549                                 insn->jf = msock_filter.len - idx - 2;
3550                         else if (insn->jf == FAIL)
3551                                 insn->jf = msock_filter.len - idx - 3;
3552                 }
3553         }
3554
3555         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3556                        &msock_filter, sizeof(msock_filter))) {
3557                 perror("SO_ATTACH_FILTER");
3558                 return -1;
3559         }
3560
3561         return 0;
3562 }
3563
3564
3565 static void nl80211_remove_monitor_interface(
3566         struct wpa_driver_nl80211_data *drv)
3567 {
3568         if (drv->monitor_ifidx >= 0) {
3569                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3570                 drv->monitor_ifidx = -1;
3571         }
3572         if (drv->monitor_sock >= 0) {
3573                 eloop_unregister_read_sock(drv->monitor_sock);
3574                 close(drv->monitor_sock);
3575                 drv->monitor_sock = -1;
3576         }
3577 }
3578
3579
3580 static int
3581 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3582 {
3583         char buf[IFNAMSIZ];
3584         struct sockaddr_ll ll;
3585         int optval;
3586         socklen_t optlen;
3587
3588         snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
3589         buf[IFNAMSIZ - 1] = '\0';
3590
3591         drv->monitor_ifidx =
3592                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3593                                      0);
3594
3595         if (drv->monitor_ifidx < 0)
3596                 return -1;
3597
3598         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3599                 goto error;
3600
3601         memset(&ll, 0, sizeof(ll));
3602         ll.sll_family = AF_PACKET;
3603         ll.sll_ifindex = drv->monitor_ifidx;
3604         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3605         if (drv->monitor_sock < 0) {
3606                 perror("socket[PF_PACKET,SOCK_RAW]");
3607                 goto error;
3608         }
3609
3610         if (add_monitor_filter(drv->monitor_sock)) {
3611                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3612                            "interface; do filtering in user space");
3613                 /* This works, but will cost in performance. */
3614         }
3615
3616         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3617                 perror("monitor socket bind");
3618                 goto error;
3619         }
3620
3621         optlen = sizeof(optval);
3622         optval = 20;
3623         if (setsockopt
3624             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3625                 perror("Failed to set socket priority");
3626                 goto error;
3627         }
3628
3629         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3630                                      drv, NULL)) {
3631                 printf("Could not register monitor read socket\n");
3632                 goto error;
3633         }
3634
3635         return 0;
3636  error:
3637         nl80211_remove_monitor_interface(drv);
3638         return -1;
3639 }
3640
3641
3642 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3643
3644 static int wpa_driver_nl80211_hapd_send_eapol(
3645         void *priv, const u8 *addr, const u8 *data,
3646         size_t data_len, int encrypt, const u8 *own_addr)
3647 {
3648         struct i802_bss *bss = priv;
3649         struct wpa_driver_nl80211_data *drv = bss->drv;
3650         struct ieee80211_hdr *hdr;
3651         size_t len;
3652         u8 *pos;
3653         int res;
3654 #if 0 /* FIX */
3655         int qos = sta->flags & WPA_STA_WMM;
3656 #else
3657         int qos = 0;
3658 #endif
3659
3660         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3661                 data_len;
3662         hdr = os_zalloc(len);
3663         if (hdr == NULL) {
3664                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3665                        (unsigned long) len);
3666                 return -1;
3667         }
3668
3669         hdr->frame_control =
3670                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3671         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3672         if (encrypt)
3673                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3674 #if 0 /* To be enabled if qos determination is added above */
3675         if (qos) {
3676                 hdr->frame_control |=
3677                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3678         }
3679 #endif
3680
3681         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3682         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3683         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3684         pos = (u8 *) (hdr + 1);
3685
3686 #if 0 /* To be enabled if qos determination is added above */
3687         if (qos) {
3688                 /* add an empty QoS header if needed */
3689                 pos[0] = 0;
3690                 pos[1] = 0;
3691                 pos += 2;
3692         }
3693 #endif
3694
3695         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3696         pos += sizeof(rfc1042_header);
3697         WPA_PUT_BE16(pos, ETH_P_PAE);
3698         pos += 2;
3699         memcpy(pos, data, data_len);
3700
3701         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3702         if (res < 0) {
3703                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3704                            "failed: %d (%s)",
3705                            (unsigned long) len, errno, strerror(errno));
3706         }
3707         os_free(hdr);
3708
3709         return res;
3710 }
3711
3712
3713 static u32 sta_flags_nl80211(int flags)
3714 {
3715         u32 f = 0;
3716
3717         if (flags & WPA_STA_AUTHORIZED)
3718                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3719         if (flags & WPA_STA_WMM)
3720                 f |= BIT(NL80211_STA_FLAG_WME);
3721         if (flags & WPA_STA_SHORT_PREAMBLE)
3722                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3723         if (flags & WPA_STA_MFP)
3724                 f |= BIT(NL80211_STA_FLAG_MFP);
3725
3726         return f;
3727 }
3728
3729
3730 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3731                                             int total_flags,
3732                                             int flags_or, int flags_and)
3733 {
3734         struct i802_bss *bss = priv;
3735         struct wpa_driver_nl80211_data *drv = bss->drv;
3736         struct nl_msg *msg, *flags = NULL;
3737         struct nl80211_sta_flag_update upd;
3738
3739         msg = nlmsg_alloc();
3740         if (!msg)
3741                 return -ENOMEM;
3742
3743         flags = nlmsg_alloc();
3744         if (!flags) {
3745                 nlmsg_free(msg);
3746                 return -ENOMEM;
3747         }
3748
3749         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3750                     0, NL80211_CMD_SET_STATION, 0);
3751
3752         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3753                     if_nametoindex(bss->ifname));
3754         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3755
3756         /*
3757          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3758          * can be removed eventually.
3759          */
3760         if (total_flags & WPA_STA_AUTHORIZED)
3761                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3762
3763         if (total_flags & WPA_STA_WMM)
3764                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3765
3766         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3767                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3768
3769         if (total_flags & WPA_STA_MFP)
3770                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3771
3772         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3773                 goto nla_put_failure;
3774
3775         os_memset(&upd, 0, sizeof(upd));
3776         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3777         upd.set = sta_flags_nl80211(flags_or);
3778         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3779
3780         nlmsg_free(flags);
3781
3782         return send_and_recv_msgs(drv, msg, NULL, NULL);
3783  nla_put_failure:
3784         nlmsg_free(flags);
3785         return -ENOBUFS;
3786 }
3787
3788
3789 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3790                                  struct wpa_driver_associate_params *params)
3791 {
3792         if (params->p2p)
3793                 wpa_printf(MSG_DEBUG, "nl80211: Setup AP operations for P2P "
3794                            "group (GO)");
3795         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
3796             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3797                 nl80211_remove_monitor_interface(drv);
3798                 return -1;
3799         }
3800
3801         /* TODO: setup monitor interface (and add code somewhere to remove this
3802          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3803
3804         return 0;
3805 }
3806
3807
3808 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3809 {
3810         struct nl_msg *msg;
3811         int ret = -1;
3812
3813         msg = nlmsg_alloc();
3814         if (!msg)
3815                 return -1;
3816
3817         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3818                     NL80211_CMD_LEAVE_IBSS, 0);
3819         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3820         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3821         msg = NULL;
3822         if (ret) {
3823                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3824                            "(%s)", ret, strerror(-ret));
3825                 goto nla_put_failure;
3826         }
3827
3828         ret = 0;
3829         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3830
3831 nla_put_failure:
3832         nlmsg_free(msg);
3833         return ret;
3834 }
3835
3836
3837 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3838                                    struct wpa_driver_associate_params *params)
3839 {
3840         struct nl_msg *msg;
3841         int ret = -1;
3842         int count = 0;
3843
3844         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3845
3846         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
3847                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3848                            "IBSS mode");
3849                 return -1;
3850         }
3851
3852 retry:
3853         msg = nlmsg_alloc();
3854         if (!msg)
3855                 return -1;
3856
3857         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3858                     NL80211_CMD_JOIN_IBSS, 0);
3859         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3860
3861         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3862                 goto nla_put_failure;
3863
3864         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3865                           params->ssid, params->ssid_len);
3866         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3867                 params->ssid);
3868         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3869         drv->ssid_len = params->ssid_len;
3870
3871         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3872         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3873
3874         ret = nl80211_set_conn_keys(params, msg);
3875         if (ret)
3876                 goto nla_put_failure;
3877
3878         if (params->wpa_ie) {
3879                 wpa_hexdump(MSG_DEBUG,
3880                             "  * Extra IEs for Beacon/Probe Response frames",
3881                             params->wpa_ie, params->wpa_ie_len);
3882                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3883                         params->wpa_ie);
3884         }
3885
3886         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3887         msg = NULL;
3888         if (ret) {
3889                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3890                            ret, strerror(-ret));
3891                 count++;
3892                 if (ret == -EALREADY && count == 1) {
3893                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3894                                    "forced leave");
3895                         nl80211_leave_ibss(drv);
3896                         nlmsg_free(msg);
3897                         goto retry;
3898                 }
3899
3900                 goto nla_put_failure;
3901         }
3902         ret = 0;
3903         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3904
3905 nla_put_failure:
3906         nlmsg_free(msg);
3907         return ret;
3908 }
3909
3910
3911 static int wpa_driver_nl80211_connect(
3912         struct wpa_driver_nl80211_data *drv,
3913         struct wpa_driver_associate_params *params)
3914 {
3915         struct nl_msg *msg;
3916         enum nl80211_auth_type type;
3917         int ret = 0;
3918
3919         msg = nlmsg_alloc();
3920         if (!msg)
3921                 return -1;
3922
3923         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3924         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3925                     NL80211_CMD_CONNECT, 0);
3926
3927         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3928         if (params->bssid) {
3929                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3930                            MAC2STR(params->bssid));
3931                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3932         }
3933         if (params->freq) {
3934                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3935                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3936         }
3937         if (params->ssid) {
3938                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3939                                   params->ssid, params->ssid_len);
3940                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3941                         params->ssid);
3942                 if (params->ssid_len > sizeof(drv->ssid))
3943                         goto nla_put_failure;
3944                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3945                 drv->ssid_len = params->ssid_len;
3946         }
3947         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3948         if (params->wpa_ie)
3949                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3950                         params->wpa_ie);
3951
3952         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3953                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3954         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3955                 type = NL80211_AUTHTYPE_SHARED_KEY;
3956         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3957                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3958         else if (params->auth_alg & WPA_AUTH_ALG_FT)
3959                 type = NL80211_AUTHTYPE_FT;
3960         else
3961                 goto nla_put_failure;
3962
3963         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3964         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3965
3966         if (params->wpa_ie && params->wpa_ie_len) {
3967                 enum nl80211_wpa_versions ver;
3968
3969                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3970                         ver = NL80211_WPA_VERSION_2;
3971                 else
3972                         ver = NL80211_WPA_VERSION_1;
3973
3974                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3975                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3976         }
3977
3978         if (params->pairwise_suite != CIPHER_NONE) {
3979                 int cipher;
3980
3981                 switch (params->pairwise_suite) {
3982                 case CIPHER_WEP40:
3983                         cipher = WLAN_CIPHER_SUITE_WEP40;
3984                         break;
3985                 case CIPHER_WEP104:
3986                         cipher = WLAN_CIPHER_SUITE_WEP104;
3987                         break;
3988                 case CIPHER_CCMP:
3989                         cipher = WLAN_CIPHER_SUITE_CCMP;
3990                         break;
3991                 case CIPHER_TKIP:
3992                 default:
3993                         cipher = WLAN_CIPHER_SUITE_TKIP;
3994                         break;
3995                 }
3996                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3997         }
3998
3999         if (params->group_suite != CIPHER_NONE) {
4000                 int cipher;
4001
4002                 switch (params->group_suite) {
4003                 case CIPHER_WEP40:
4004                         cipher = WLAN_CIPHER_SUITE_WEP40;
4005                         break;
4006                 case CIPHER_WEP104:
4007                         cipher = WLAN_CIPHER_SUITE_WEP104;
4008                         break;
4009                 case CIPHER_CCMP:
4010                         cipher = WLAN_CIPHER_SUITE_CCMP;
4011                         break;
4012                 case CIPHER_TKIP:
4013                 default:
4014                         cipher = WLAN_CIPHER_SUITE_TKIP;
4015                         break;
4016                 }
4017                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
4018         }
4019
4020         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
4021             params->key_mgmt_suite == KEY_MGMT_PSK) {
4022                 int mgmt = WLAN_AKM_SUITE_PSK;
4023
4024                 switch (params->key_mgmt_suite) {
4025                 case KEY_MGMT_802_1X:
4026                         mgmt = WLAN_AKM_SUITE_8021X;
4027                         break;
4028                 case KEY_MGMT_PSK:
4029                 default:
4030                         mgmt = WLAN_AKM_SUITE_PSK;
4031                         break;
4032                 }
4033                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
4034         }
4035
4036         ret = nl80211_set_conn_keys(params, msg);
4037         if (ret)
4038                 goto nla_put_failure;
4039
4040         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4041         msg = NULL;
4042         if (ret) {
4043                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
4044                            "(%s)", ret, strerror(-ret));
4045                 goto nla_put_failure;
4046         }
4047         ret = 0;
4048         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
4049
4050 nla_put_failure:
4051         nlmsg_free(msg);
4052         return ret;
4053
4054 }
4055
4056
4057 static int wpa_driver_nl80211_associate(
4058         void *priv, struct wpa_driver_associate_params *params)
4059 {
4060         struct i802_bss *bss = priv;
4061         struct wpa_driver_nl80211_data *drv = bss->drv;
4062         int ret = -1;
4063         struct nl_msg *msg;
4064
4065         if (params->mode == IEEE80211_MODE_AP)
4066                 return wpa_driver_nl80211_ap(drv, params);
4067
4068         if (params->mode == IEEE80211_MODE_IBSS)
4069                 return wpa_driver_nl80211_ibss(drv, params);
4070
4071         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
4072                 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
4073                         return -1;
4074                 return wpa_driver_nl80211_connect(drv, params);
4075         }
4076
4077         drv->associated = 0;
4078
4079         msg = nlmsg_alloc();
4080         if (!msg)
4081                 return -1;
4082
4083         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
4084                    drv->ifindex);
4085         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4086                     NL80211_CMD_ASSOCIATE, 0);
4087
4088         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4089         if (params->bssid) {
4090                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
4091                            MAC2STR(params->bssid));
4092                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
4093         }
4094         if (params->freq) {
4095                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
4096                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
4097                 drv->assoc_freq = params->freq;
4098         } else
4099                 drv->assoc_freq = 0;
4100         if (params->ssid) {
4101                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
4102                                   params->ssid, params->ssid_len);
4103                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
4104                         params->ssid);
4105                 if (params->ssid_len > sizeof(drv->ssid))
4106                         goto nla_put_failure;
4107                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
4108                 drv->ssid_len = params->ssid_len;
4109         }
4110         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
4111         if (params->wpa_ie)
4112                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
4113                         params->wpa_ie);
4114
4115 #ifdef CONFIG_IEEE80211W
4116         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
4117                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
4118 #endif /* CONFIG_IEEE80211W */
4119
4120         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
4121
4122         if (params->prev_bssid) {
4123                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
4124                            MAC2STR(params->prev_bssid));
4125                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
4126                         params->prev_bssid);
4127         }
4128
4129         if (params->p2p)
4130                 wpa_printf(MSG_DEBUG, "  * P2P group");
4131
4132         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4133         msg = NULL;
4134         if (ret) {
4135                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
4136                            "(%s)", ret, strerror(-ret));
4137                 nl80211_dump_scan(drv);
4138                 goto nla_put_failure;
4139         }
4140         ret = 0;
4141         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
4142                    "successfully");
4143
4144 nla_put_failure:
4145         nlmsg_free(msg);
4146         return ret;
4147 }
4148
4149
4150 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
4151                             int ifindex, int mode)
4152 {
4153         struct nl_msg *msg;
4154         int ret = -ENOBUFS;
4155
4156         msg = nlmsg_alloc();
4157         if (!msg)
4158                 return -ENOMEM;
4159
4160         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4161                     0, NL80211_CMD_SET_INTERFACE, 0);
4162         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4163         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
4164
4165         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4166         if (!ret)
4167                 return 0;
4168 nla_put_failure:
4169         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
4170                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
4171         return ret;
4172 }
4173
4174
4175 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
4176 {
4177         struct i802_bss *bss = priv;
4178         struct wpa_driver_nl80211_data *drv = bss->drv;
4179         int ret = -1;
4180         int nlmode;
4181         int i;
4182
4183         switch (mode) {
4184         case 0:
4185                 nlmode = NL80211_IFTYPE_STATION;
4186                 break;
4187         case 1:
4188                 nlmode = NL80211_IFTYPE_ADHOC;
4189                 break;
4190         case 2:
4191                 nlmode = NL80211_IFTYPE_AP;
4192                 break;
4193         default:
4194                 return -1;
4195         }
4196
4197         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
4198                 drv->nlmode = nlmode;
4199                 ret = 0;
4200                 goto done;
4201         }
4202
4203         if (nlmode == drv->nlmode) {
4204                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
4205                            "requested mode - ignore error");
4206                 ret = 0;
4207                 goto done; /* Already in the requested mode */
4208         }
4209
4210         /* mac80211 doesn't allow mode changes while the device is up, so
4211          * take the device down, try to set the mode again, and bring the
4212          * device back up.
4213          */
4214         wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
4215                    "interface down");
4216         for (i = 0; i < 10; i++) {
4217                 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) ==
4218                     0) {
4219                         /* Try to set the mode again while the interface is
4220                          * down */
4221                         ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
4222                         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname,
4223                                                   1))
4224                                 ret = -1;
4225                         if (!ret)
4226                                 break;
4227                 } else
4228                         wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
4229                                    "interface down");
4230                 os_sleep(0, 100000);
4231         }
4232
4233         if (!ret) {
4234                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
4235                            "interface is down");
4236                 drv->nlmode = nlmode;
4237         }
4238
4239 done:
4240         if (!ret && nlmode == NL80211_IFTYPE_AP) {
4241                 /* Setup additional AP mode functionality if needed */
4242                 if (drv->monitor_ifidx < 0 &&
4243                     nl80211_create_monitor_interface(drv))
4244                         return -1;
4245         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
4246                 /* Remove additional AP mode functionality */
4247                 nl80211_remove_monitor_interface(drv);
4248                 bss->beacon_set = 0;
4249         }
4250
4251         if (ret)
4252                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
4253                            "from %d failed", nlmode, drv->nlmode);
4254
4255         return ret;
4256 }
4257
4258
4259 static int wpa_driver_nl80211_get_capa(void *priv,
4260                                        struct wpa_driver_capa *capa)
4261 {
4262         struct i802_bss *bss = priv;
4263         struct wpa_driver_nl80211_data *drv = bss->drv;
4264         if (!drv->has_capability)
4265                 return -1;
4266         os_memcpy(capa, &drv->capa, sizeof(*capa));
4267         return 0;
4268 }
4269
4270
4271 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
4272 {
4273         struct i802_bss *bss = priv;
4274         struct wpa_driver_nl80211_data *drv = bss->drv;
4275
4276         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
4277                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
4278         drv->operstate = state;
4279         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
4280                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
4281 }
4282
4283
4284 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
4285 {
4286         struct i802_bss *bss = priv;
4287         struct wpa_driver_nl80211_data *drv = bss->drv;
4288         struct nl_msg *msg;
4289         struct nl80211_sta_flag_update upd;
4290
4291         msg = nlmsg_alloc();
4292         if (!msg)
4293                 return -ENOMEM;
4294
4295         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4296                     0, NL80211_CMD_SET_STATION, 0);
4297
4298         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4299                     if_nametoindex(bss->ifname));
4300         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
4301
4302         os_memset(&upd, 0, sizeof(upd));
4303         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
4304         if (authorized)
4305                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
4306         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4307
4308         return send_and_recv_msgs(drv, msg, NULL, NULL);
4309  nla_put_failure:
4310         return -ENOBUFS;
4311 }
4312
4313
4314 #ifdef HOSTAPD
4315
4316 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4317 {
4318         int i;
4319         int *old;
4320
4321         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
4322                    ifidx);
4323         for (i = 0; i < drv->num_if_indices; i++) {
4324                 if (drv->if_indices[i] == 0) {
4325                         drv->if_indices[i] = ifidx;
4326                         return;
4327                 }
4328         }
4329
4330         if (drv->if_indices != drv->default_if_indices)
4331                 old = drv->if_indices;
4332         else
4333                 old = NULL;
4334
4335         drv->if_indices = os_realloc(old,
4336                                      sizeof(int) * (drv->num_if_indices + 1));
4337         if (!drv->if_indices) {
4338                 if (!old)
4339                         drv->if_indices = drv->default_if_indices;
4340                 else
4341                         drv->if_indices = old;
4342                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4343                            "interfaces");
4344                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4345                 return;
4346         } else if (!old)
4347                 os_memcpy(drv->if_indices, drv->default_if_indices,
4348                           sizeof(drv->default_if_indices));
4349         drv->if_indices[drv->num_if_indices] = ifidx;
4350         drv->num_if_indices++;
4351 }
4352
4353
4354 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4355 {
4356         int i;
4357
4358         for (i = 0; i < drv->num_if_indices; i++) {
4359                 if (drv->if_indices[i] == ifidx) {
4360                         drv->if_indices[i] = 0;
4361                         break;
4362                 }
4363         }
4364 }
4365
4366
4367 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4368 {
4369         int i;
4370
4371         for (i = 0; i < drv->num_if_indices; i++)
4372                 if (drv->if_indices[i] == ifidx)
4373                         return 1;
4374
4375         return 0;
4376 }
4377
4378
4379 static inline int min_int(int a, int b)
4380 {
4381         if (a < b)
4382                 return a;
4383         return b;
4384 }
4385
4386
4387 static int get_key_handler(struct nl_msg *msg, void *arg)
4388 {
4389         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4390         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4391
4392         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4393                   genlmsg_attrlen(gnlh, 0), NULL);
4394
4395         /*
4396          * TODO: validate the key index and mac address!
4397          * Otherwise, there's a race condition as soon as
4398          * the kernel starts sending key notifications.
4399          */
4400
4401         if (tb[NL80211_ATTR_KEY_SEQ])
4402                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4403                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4404         return NL_SKIP;
4405 }
4406
4407
4408 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4409                            int idx, u8 *seq)
4410 {
4411         struct i802_bss *bss = priv;
4412         struct wpa_driver_nl80211_data *drv = bss->drv;
4413         struct nl_msg *msg;
4414
4415         msg = nlmsg_alloc();
4416         if (!msg)
4417                 return -ENOMEM;
4418
4419         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4420                     0, NL80211_CMD_GET_KEY, 0);
4421
4422         if (addr)
4423                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4424         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4425         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4426
4427         memset(seq, 0, 6);
4428
4429         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4430  nla_put_failure:
4431         return -ENOBUFS;
4432 }
4433
4434
4435 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4436                               int mode)
4437 {
4438         struct i802_bss *bss = priv;
4439         struct wpa_driver_nl80211_data *drv = bss->drv;
4440         struct nl_msg *msg;
4441         u8 rates[NL80211_MAX_SUPP_RATES];
4442         u8 rates_len = 0;
4443         int i;
4444
4445         msg = nlmsg_alloc();
4446         if (!msg)
4447                 return -ENOMEM;
4448
4449         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4450                     NL80211_CMD_SET_BSS, 0);
4451
4452         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4453                 rates[rates_len++] = basic_rates[i] / 5;
4454
4455         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4456
4457         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4458
4459         return send_and_recv_msgs(drv, msg, NULL, NULL);
4460  nla_put_failure:
4461         return -ENOBUFS;
4462 }
4463
4464 #endif /* HOSTAPD */
4465
4466
4467 /* Set kernel driver on given frequency (MHz) */
4468 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4469 {
4470         struct i802_bss *bss = priv;
4471         struct wpa_driver_nl80211_data *drv = bss->drv;
4472         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4473                                            freq->sec_channel_offset);
4474 }
4475
4476
4477 #ifdef HOSTAPD
4478
4479 static int i802_set_rts(void *priv, int rts)
4480 {
4481         struct i802_bss *bss = priv;
4482         struct wpa_driver_nl80211_data *drv = bss->drv;
4483         struct nl_msg *msg;
4484         int ret = -ENOBUFS;
4485         u32 val;
4486
4487         msg = nlmsg_alloc();
4488         if (!msg)
4489                 return -ENOMEM;
4490
4491         if (rts >= 2347)
4492                 val = (u32) -1;
4493         else
4494                 val = rts;
4495
4496         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4497                     0, NL80211_CMD_SET_WIPHY, 0);
4498         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4499         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4500
4501         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4502         if (!ret)
4503                 return 0;
4504 nla_put_failure:
4505         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4506                    "%d (%s)", rts, ret, strerror(-ret));
4507         return ret;
4508 }
4509
4510
4511 static int i802_set_frag(void *priv, int frag)
4512 {
4513         struct i802_bss *bss = priv;
4514         struct wpa_driver_nl80211_data *drv = bss->drv;
4515         struct nl_msg *msg;
4516         int ret = -ENOBUFS;
4517         u32 val;
4518
4519         msg = nlmsg_alloc();
4520         if (!msg)
4521                 return -ENOMEM;
4522
4523         if (frag >= 2346)
4524                 val = (u32) -1;
4525         else
4526                 val = frag;
4527
4528         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4529                     0, NL80211_CMD_SET_WIPHY, 0);
4530         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4531         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4532
4533         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4534         if (!ret)
4535                 return 0;
4536 nla_put_failure:
4537         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4538                    "%d: %d (%s)", frag, ret, strerror(-ret));
4539         return ret;
4540 }
4541
4542
4543 static int i802_flush(void *priv)
4544 {
4545         struct i802_bss *bss = priv;
4546         struct wpa_driver_nl80211_data *drv = bss->drv;
4547         struct nl_msg *msg;
4548
4549         msg = nlmsg_alloc();
4550         if (!msg)
4551                 return -1;
4552
4553         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4554                     0, NL80211_CMD_DEL_STATION, 0);
4555
4556         /*
4557          * XXX: FIX! this needs to flush all VLANs too
4558          */
4559         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4560                     if_nametoindex(bss->ifname));
4561
4562         return send_and_recv_msgs(drv, msg, NULL, NULL);
4563  nla_put_failure:
4564         return -ENOBUFS;
4565 }
4566
4567
4568 static int get_sta_handler(struct nl_msg *msg, void *arg)
4569 {
4570         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4571         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4572         struct hostap_sta_driver_data *data = arg;
4573         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4574         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4575                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4576                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4577                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4578                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4579                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4580         };
4581
4582         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4583                   genlmsg_attrlen(gnlh, 0), NULL);
4584
4585         /*
4586          * TODO: validate the interface and mac address!
4587          * Otherwise, there's a race condition as soon as
4588          * the kernel starts sending station notifications.
4589          */
4590
4591         if (!tb[NL80211_ATTR_STA_INFO]) {
4592                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4593                 return NL_SKIP;
4594         }
4595         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4596                              tb[NL80211_ATTR_STA_INFO],
4597                              stats_policy)) {
4598                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4599                 return NL_SKIP;
4600         }
4601
4602         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4603                 data->inactive_msec =
4604                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4605         if (stats[NL80211_STA_INFO_RX_BYTES])
4606                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4607         if (stats[NL80211_STA_INFO_TX_BYTES])
4608                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4609         if (stats[NL80211_STA_INFO_RX_PACKETS])
4610                 data->rx_packets =
4611                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4612         if (stats[NL80211_STA_INFO_TX_PACKETS])
4613                 data->tx_packets =
4614                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4615
4616         return NL_SKIP;
4617 }
4618
4619 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4620                               const u8 *addr)
4621 {
4622         struct i802_bss *bss = priv;
4623         struct wpa_driver_nl80211_data *drv = bss->drv;
4624         struct nl_msg *msg;
4625
4626         os_memset(data, 0, sizeof(*data));
4627         msg = nlmsg_alloc();
4628         if (!msg)
4629                 return -ENOMEM;
4630
4631         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4632                     0, NL80211_CMD_GET_STATION, 0);
4633
4634         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4635         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4636
4637         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4638  nla_put_failure:
4639         return -ENOBUFS;
4640 }
4641
4642
4643 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4644                                     int cw_min, int cw_max, int burst_time)
4645 {
4646         struct i802_bss *bss = priv;
4647         struct wpa_driver_nl80211_data *drv = bss->drv;
4648         struct nl_msg *msg;
4649         struct nlattr *txq, *params;
4650
4651         msg = nlmsg_alloc();
4652         if (!msg)
4653                 return -1;
4654
4655         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4656                     0, NL80211_CMD_SET_WIPHY, 0);
4657
4658         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4659
4660         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4661         if (!txq)
4662                 goto nla_put_failure;
4663
4664         /* We are only sending parameters for a single TXQ at a time */
4665         params = nla_nest_start(msg, 1);
4666         if (!params)
4667                 goto nla_put_failure;
4668
4669         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4670         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4671          * 32 usec, so need to convert the value here. */
4672         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4673         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4674         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4675         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4676
4677         nla_nest_end(msg, params);
4678
4679         nla_nest_end(msg, txq);
4680
4681         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4682                 return 0;
4683  nla_put_failure:
4684         return -1;
4685 }
4686
4687
4688 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4689 {
4690         struct i802_bss *bss = priv;
4691         struct wpa_driver_nl80211_data *drv = bss->drv;
4692         struct nl_msg *msg;
4693
4694         msg = nlmsg_alloc();
4695         if (!msg)
4696                 return -ENOMEM;
4697
4698         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4699                     NL80211_CMD_SET_BSS, 0);
4700
4701         if (cts >= 0)
4702                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4703         if (preamble >= 0)
4704                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4705         if (slot >= 0)
4706                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4707
4708         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4709
4710         return send_and_recv_msgs(drv, msg, NULL, NULL);
4711  nla_put_failure:
4712         return -ENOBUFS;
4713 }
4714
4715
4716 static int i802_set_cts_protect(void *priv, int value)
4717 {
4718         return i802_set_bss(priv, value, -1, -1);
4719 }
4720
4721
4722 static int i802_set_preamble(void *priv, int value)
4723 {
4724         return i802_set_bss(priv, -1, value, -1);
4725 }
4726
4727
4728 static int i802_set_short_slot_time(void *priv, int value)
4729 {
4730         return i802_set_bss(priv, -1, -1, value);
4731 }
4732
4733
4734 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4735                              const char *ifname, int vlan_id)
4736 {
4737         struct i802_bss *bss = priv;
4738         struct wpa_driver_nl80211_data *drv = bss->drv;
4739         struct nl_msg *msg;
4740         int ret = -ENOBUFS;
4741
4742         msg = nlmsg_alloc();
4743         if (!msg)
4744                 return -ENOMEM;
4745
4746         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4747                     0, NL80211_CMD_SET_STATION, 0);
4748
4749         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4750                     if_nametoindex(bss->ifname));
4751         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4752         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4753                     if_nametoindex(ifname));
4754
4755         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4756         if (ret < 0) {
4757                 wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
4758                            MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
4759                            MAC2STR(addr), ifname, vlan_id, ret,
4760                            strerror(-ret));
4761         }
4762  nla_put_failure:
4763         return ret;
4764 }
4765
4766
4767 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4768 {
4769         struct i802_bss *bss = priv;
4770         struct wpa_driver_nl80211_data *drv = bss->drv;
4771         char name[IFNAMSIZ + 1];
4772
4773         os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
4774         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4775                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4776         if (val) {
4777                 if (nl80211_create_iface(drv, name, NL80211_IFTYPE_AP_VLAN,
4778                                          NULL, 1) < 0)
4779                         return -1;
4780                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4781                 return i802_set_sta_vlan(priv, addr, name, 0);
4782         } else {
4783                 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
4784                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4785                                                     name);
4786         }
4787 }
4788
4789
4790 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4791 {
4792         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4793         struct sockaddr_ll lladdr;
4794         unsigned char buf[3000];
4795         int len;
4796         socklen_t fromlen = sizeof(lladdr);
4797
4798         len = recvfrom(sock, buf, sizeof(buf), 0,
4799                        (struct sockaddr *)&lladdr, &fromlen);
4800         if (len < 0) {
4801                 perror("recv");
4802                 return;
4803         }
4804
4805         if (have_ifidx(drv, lladdr.sll_ifindex))
4806                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4807 }
4808
4809
4810 static int i802_get_inact_sec(void *priv, const u8 *addr)
4811 {
4812         struct hostap_sta_driver_data data;
4813         int ret;
4814
4815         data.inactive_msec = (unsigned long) -1;
4816         ret = i802_read_sta_data(priv, &data, addr);
4817         if (ret || data.inactive_msec == (unsigned long) -1)
4818                 return -1;
4819         return data.inactive_msec / 1000;
4820 }
4821
4822
4823 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4824 {
4825 #if 0
4826         /* TODO */
4827 #endif
4828         return 0;
4829 }
4830
4831
4832 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4833                            int reason)
4834 {
4835         struct i802_bss *bss = priv;
4836         struct ieee80211_mgmt mgmt;
4837
4838         memset(&mgmt, 0, sizeof(mgmt));
4839         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4840                                           WLAN_FC_STYPE_DEAUTH);
4841         memcpy(mgmt.da, addr, ETH_ALEN);
4842         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4843         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4844         mgmt.u.deauth.reason_code = host_to_le16(reason);
4845         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4846                                             IEEE80211_HDRLEN +
4847                                             sizeof(mgmt.u.deauth));
4848 }
4849
4850
4851 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4852                              int reason)
4853 {
4854         struct i802_bss *bss = priv;
4855         struct ieee80211_mgmt mgmt;
4856
4857         memset(&mgmt, 0, sizeof(mgmt));
4858         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4859                                           WLAN_FC_STYPE_DISASSOC);
4860         memcpy(mgmt.da, addr, ETH_ALEN);
4861         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4862         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4863         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4864         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4865                                             IEEE80211_HDRLEN +
4866                                             sizeof(mgmt.u.disassoc));
4867 }
4868
4869
4870 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4871                              const char *brname, const char *ifname)
4872 {
4873         int ifindex;
4874         char in_br[IFNAMSIZ];
4875
4876         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4877         ifindex = if_nametoindex(brname);
4878         if (ifindex == 0) {
4879                 /*
4880                  * Bridge was configured, but the bridge device does
4881                  * not exist. Try to add it now.
4882                  */
4883                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4884                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4885                                    "bridge interface %s: %s",
4886                                    brname, strerror(errno));
4887                         return -1;
4888                 }
4889                 drv->added_bridge = 1;
4890                 add_ifidx(drv, if_nametoindex(brname));
4891         }
4892
4893         if (linux_br_get(in_br, ifname) == 0) {
4894                 if (os_strcmp(in_br, brname) == 0)
4895                         return 0; /* already in the bridge */
4896
4897                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4898                            "bridge %s", ifname, in_br);
4899                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4900                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4901                                    "remove interface %s from bridge "
4902                                    "%s: %s",
4903                                    ifname, brname, strerror(errno));
4904                         return -1;
4905                 }
4906         }
4907
4908         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4909                    ifname, brname);
4910         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4911                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4912                            "into bridge %s: %s",
4913                            ifname, brname, strerror(errno));
4914                 return -1;
4915         }
4916         drv->added_if_into_bridge = 1;
4917
4918         return 0;
4919 }
4920
4921
4922 static void *i802_init(struct hostapd_data *hapd,
4923                        struct wpa_init_params *params)
4924 {
4925         struct wpa_driver_nl80211_data *drv;
4926         struct i802_bss *bss;
4927         size_t i;
4928         char brname[IFNAMSIZ];
4929         int ifindex, br_ifindex;
4930         int br_added = 0;
4931
4932         bss = wpa_driver_nl80211_init(hapd, params->ifname);
4933         if (bss == NULL)
4934                 return NULL;
4935
4936         drv = bss->drv;
4937         if (linux_br_get(brname, params->ifname) == 0) {
4938                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4939                            params->ifname, brname);
4940                 br_ifindex = if_nametoindex(brname);
4941         } else {
4942                 brname[0] = '\0';
4943                 br_ifindex = 0;
4944         }
4945
4946         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4947         drv->if_indices = drv->default_if_indices;
4948         for (i = 0; i < params->num_bridge; i++) {
4949                 if (params->bridge[i]) {
4950                         ifindex = if_nametoindex(params->bridge[i]);
4951                         if (ifindex)
4952                                 add_ifidx(drv, ifindex);
4953                         if (ifindex == br_ifindex)
4954                                 br_added = 1;
4955                 }
4956         }
4957         if (!br_added && br_ifindex &&
4958             (params->num_bridge == 0 || !params->bridge[0]))
4959                 add_ifidx(drv, br_ifindex);
4960
4961         /* start listening for EAPOL on the default AP interface */
4962         add_ifidx(drv, drv->ifindex);
4963
4964         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
4965                 goto failed;
4966
4967         if (params->bssid) {
4968                 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
4969                                        params->bssid))
4970                         goto failed;
4971         }
4972
4973         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
4974                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4975                            "into AP mode", bss->ifname);
4976                 goto failed;
4977         }
4978
4979         if (params->num_bridge && params->bridge[0] &&
4980             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
4981                 goto failed;
4982
4983         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
4984                 goto failed;
4985
4986         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4987         if (drv->eapol_sock < 0) {
4988                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4989                 goto failed;
4990         }
4991
4992         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4993         {
4994                 printf("Could not register read socket for eapol\n");
4995                 goto failed;
4996         }
4997
4998         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
4999                 goto failed;
5000
5001         return bss;
5002
5003 failed:
5004         nl80211_remove_monitor_interface(drv);
5005         if (drv->ioctl_sock >= 0)
5006                 close(drv->ioctl_sock);
5007
5008         genl_family_put(drv->nl80211);
5009         nl_cache_free(drv->nl_cache);
5010         nl_handle_destroy(drv->nl_handle);
5011         nl_cb_put(drv->nl_cb);
5012
5013         os_free(drv);
5014         return NULL;
5015 }
5016
5017
5018 static void i802_deinit(void *priv)
5019 {
5020         wpa_driver_nl80211_deinit(priv);
5021 }
5022
5023 #endif /* HOSTAPD */
5024
5025
5026 static enum nl80211_iftype wpa_driver_nl80211_if_type(
5027         enum wpa_driver_if_type type)
5028 {
5029         switch (type) {
5030         case WPA_IF_STATION:
5031         case WPA_IF_P2P_CLIENT:
5032         case WPA_IF_P2P_GROUP:
5033                 return NL80211_IFTYPE_STATION;
5034         case WPA_IF_AP_VLAN:
5035                 return NL80211_IFTYPE_AP_VLAN;
5036         case WPA_IF_AP_BSS:
5037         case WPA_IF_P2P_GO:
5038                 return NL80211_IFTYPE_AP;
5039         }
5040         return -1;
5041 }
5042
5043
5044 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
5045                                      const char *ifname, const u8 *addr,
5046                                      void *bss_ctx, void **drv_priv,
5047                                      char *force_ifname, u8 *if_addr)
5048 {
5049         struct i802_bss *bss = priv;
5050         struct wpa_driver_nl80211_data *drv = bss->drv;
5051         int ifidx;
5052 #ifdef HOSTAPD
5053         struct i802_bss *new_bss = NULL;
5054
5055         if (type == WPA_IF_AP_BSS) {
5056                 new_bss = os_zalloc(sizeof(*new_bss));
5057                 if (new_bss == NULL)
5058                         return -1;
5059         }
5060 #endif /* HOSTAPD */
5061
5062         if (addr)
5063                 os_memcpy(if_addr, addr, ETH_ALEN);
5064         ifidx = nl80211_create_iface(drv, ifname,
5065                                      wpa_driver_nl80211_if_type(type), addr,
5066                                      0);
5067         if (ifidx < 0) {
5068 #ifdef HOSTAPD
5069                 os_free(new_bss);
5070 #endif /* HOSTAPD */
5071                 return -1;
5072         }
5073
5074         if (!addr &&
5075             linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0)
5076                 return -1;
5077
5078 #ifdef HOSTAPD
5079         if (type == WPA_IF_AP_BSS) {
5080                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
5081                         nl80211_remove_iface(drv, ifidx);
5082                         os_free(new_bss);
5083                         return -1;
5084                 }
5085                 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
5086                 new_bss->ifindex = ifidx;
5087                 new_bss->drv = drv;
5088                 new_bss->next = drv->first_bss.next;
5089                 drv->first_bss.next = new_bss;
5090                 if (drv_priv)
5091                         *drv_priv = new_bss;
5092         }
5093 #endif /* HOSTAPD */
5094
5095         return 0;
5096 }
5097
5098
5099 static int wpa_driver_nl80211_if_remove(void *priv,
5100                                         enum wpa_driver_if_type type,
5101                                         const char *ifname)
5102 {
5103         struct i802_bss *bss = priv;
5104         struct wpa_driver_nl80211_data *drv = bss->drv;
5105         int ifindex = if_nametoindex(ifname);
5106
5107         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
5108                    __func__, type, ifname, ifindex);
5109         if (ifindex <= 0)
5110                 return -1;
5111         nl80211_remove_iface(drv, ifindex);
5112
5113 #ifdef HOSTAPD
5114         if (type != WPA_IF_AP_BSS)
5115                 return 0;
5116
5117         if (bss != &drv->first_bss) {
5118                 struct i802_bss *tbss = &drv->first_bss;
5119
5120                 while (tbss) {
5121                         if (tbss->next != bss)
5122                                 continue;
5123
5124                         tbss->next = bss->next;
5125                         os_free(bss);
5126                         break;
5127                 }
5128         }
5129 #endif /* HOSTAPD */
5130
5131         return 0;
5132 }
5133
5134
5135 static int cookie_handler(struct nl_msg *msg, void *arg)
5136 {
5137         struct nlattr *tb[NL80211_ATTR_MAX + 1];
5138         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5139         u64 *cookie = arg;
5140         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
5141                   genlmsg_attrlen(gnlh, 0), NULL);
5142         if (tb[NL80211_ATTR_COOKIE])
5143                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
5144         return NL_SKIP;
5145 }
5146
5147
5148 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
5149                                           const u8 *dst, const u8 *src,
5150                                           const u8 *bssid,
5151                                           const u8 *data, size_t data_len)
5152 {
5153         struct i802_bss *bss = priv;
5154         struct wpa_driver_nl80211_data *drv = bss->drv;
5155         int ret = -1;
5156         struct nl_msg *msg;
5157         u8 *buf;
5158         struct ieee80211_hdr *hdr;
5159         u64 cookie;
5160
5161         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
5162                    drv->ifindex);
5163
5164         buf = os_zalloc(24 + data_len);
5165         if (buf == NULL)
5166                 return ret;
5167         os_memcpy(buf + 24, data, data_len);
5168         hdr = (struct ieee80211_hdr *) buf;
5169         hdr->frame_control =
5170                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
5171         os_memcpy(hdr->addr1, dst, ETH_ALEN);
5172         os_memcpy(hdr->addr2, src, ETH_ALEN);
5173         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
5174
5175         if (drv->nlmode == NL80211_IFTYPE_AP) {
5176                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
5177                 os_free(buf);
5178                 return ret;
5179         }
5180
5181         msg = nlmsg_alloc();
5182         if (!msg) {
5183                 os_free(buf);
5184                 return -1;
5185         }
5186
5187         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5188                     NL80211_CMD_ACTION, 0);
5189
5190         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5191         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5192         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
5193         os_free(buf);
5194         buf = NULL;
5195
5196         cookie = 0;
5197         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5198         msg = NULL;
5199         if (ret) {
5200                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
5201                            "(%s)", ret, strerror(-ret));
5202                 goto nla_put_failure;
5203         }
5204         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
5205                    "cookie 0x%llx", (long long unsigned int) cookie);
5206         drv->send_action_cookie = cookie;
5207         ret = 0;
5208
5209 nla_put_failure:
5210         os_free(buf);
5211         nlmsg_free(msg);
5212         return ret;
5213 }
5214
5215
5216 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
5217                                                 unsigned int duration)
5218 {
5219         struct i802_bss *bss = priv;
5220         struct wpa_driver_nl80211_data *drv = bss->drv;
5221         struct nl_msg *msg;
5222         int ret;
5223         u64 cookie;
5224
5225         msg = nlmsg_alloc();
5226         if (!msg)
5227                 return -1;
5228
5229         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5230                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
5231
5232         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5233         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5234         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5235
5236         cookie = 0;
5237         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5238         if (ret == 0) {
5239                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
5240                            "0x%llx for freq=%u MHz duration=%u",
5241                            (long long unsigned int) cookie, freq, duration);
5242                 drv->remain_on_chan_cookie = cookie;
5243                 return 0;
5244         }
5245         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
5246                    "(freq=%d duration=%u): %d (%s)",
5247                    freq, duration, ret, strerror(-ret));
5248 nla_put_failure:
5249         return -1;
5250 }
5251
5252
5253 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
5254 {
5255         struct i802_bss *bss = priv;
5256         struct wpa_driver_nl80211_data *drv = bss->drv;
5257         struct nl_msg *msg;
5258         int ret;
5259
5260         if (!drv->pending_remain_on_chan) {
5261                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
5262                            "to cancel");
5263                 return -1;
5264         }
5265
5266         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
5267                    "0x%llx",
5268                    (long long unsigned int) drv->remain_on_chan_cookie);
5269
5270         msg = nlmsg_alloc();
5271         if (!msg)
5272                 return -1;
5273
5274         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5275                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
5276
5277         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5278         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
5279
5280         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5281         if (ret == 0)
5282                 return 0;
5283         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
5284                    "%d (%s)", ret, strerror(-ret));
5285 nla_put_failure:
5286         return -1;
5287 }
5288
5289
5290 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
5291                                                         void *timeout_ctx)
5292 {
5293         struct wpa_driver_nl80211_data *drv = eloop_ctx;
5294         if (drv->monitor_ifidx < 0)
5295                 return; /* monitor interface already removed */
5296
5297         if (drv->nlmode != NL80211_IFTYPE_STATION)
5298                 return; /* not in station mode anymore */
5299
5300         if (drv->probe_req_report)
5301                 return; /* reporting enabled */
5302
5303         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
5304                    "Probe Request reporting needed anymore");
5305         nl80211_remove_monitor_interface(drv);
5306 }
5307
5308
5309 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
5310 {
5311         struct i802_bss *bss = priv;
5312         struct wpa_driver_nl80211_data *drv = bss->drv;
5313
5314         if (drv->nlmode != NL80211_IFTYPE_STATION) {
5315                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
5316                            "allowed in station mode (iftype=%d)",
5317                            drv->nlmode);
5318                 return -1;
5319         }
5320         drv->probe_req_report = report;
5321
5322         if (report) {
5323                 eloop_cancel_timeout(
5324                         wpa_driver_nl80211_probe_req_report_timeout,
5325                         drv, NULL);
5326                 if (drv->monitor_ifidx < 0 &&
5327                     nl80211_create_monitor_interface(drv))
5328                         return -1;
5329         } else {
5330                 /*
5331                  * It takes a while to remove the monitor interface, so try to
5332                  * avoid doing this if it is needed again shortly. Instead,
5333                  * schedule the interface to be removed later if no need for it
5334                  * is seen.
5335                  */
5336                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
5337                            "to be removed after 10 seconds of no use");
5338                 eloop_register_timeout(
5339                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
5340                         drv, NULL);
5341         }
5342
5343         return 0;
5344 }
5345
5346
5347 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5348                                      int ifindex, int disabled)
5349 {
5350         struct nl_msg *msg;
5351         struct nlattr *bands, *band;
5352         int ret;
5353
5354         msg = nlmsg_alloc();
5355         if (!msg)
5356                 return -1;
5357
5358         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5359                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5360         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5361
5362         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5363         if (!bands)
5364                 goto nla_put_failure;
5365
5366         /*
5367          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5368          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5369          * rates. All 5 GHz rates are left enabled.
5370          */
5371         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5372         if (!band)
5373                 goto nla_put_failure;
5374         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5375                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5376         nla_nest_end(msg, band);
5377
5378         nla_nest_end(msg, bands);
5379
5380         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5381         msg = NULL;
5382         if (ret) {
5383                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5384                            "(%s)", ret, strerror(-ret));
5385         }
5386
5387         return ret;
5388
5389 nla_put_failure:
5390         nlmsg_free(msg);
5391         return -1;
5392 }
5393
5394
5395 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5396 {
5397         struct i802_bss *bss = priv;
5398         struct wpa_driver_nl80211_data *drv = bss->drv;
5399         drv->disable_11b_rates = disabled;
5400         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5401 }
5402
5403
5404 static int wpa_driver_nl80211_deinit_ap(void *priv)
5405 {
5406         struct i802_bss *bss = priv;
5407         struct wpa_driver_nl80211_data *drv = bss->drv;
5408         if (drv->nlmode != NL80211_IFTYPE_AP)
5409                 return -1;
5410         wpa_driver_nl80211_del_beacon(drv);
5411         return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
5412 }
5413
5414
5415 static void wpa_driver_nl80211_resume(void *priv)
5416 {
5417         struct i802_bss *bss = priv;
5418         struct wpa_driver_nl80211_data *drv = bss->drv;
5419         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
5420                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5421                            "resume event");
5422         }
5423 }
5424
5425
5426 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
5427                                   const u8 *ies, size_t ies_len)
5428 {
5429         struct i802_bss *bss = priv;
5430         struct wpa_driver_nl80211_data *drv = bss->drv;
5431         int ret;
5432         u8 *data, *pos;
5433         size_t data_len;
5434         u8 own_addr[ETH_ALEN];
5435
5436         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
5437                 return -1;
5438
5439         if (action != 1) {
5440                 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
5441                            "action %d", action);
5442                 return -1;
5443         }
5444
5445         /*
5446          * Action frame payload:
5447          * Category[1] = 6 (Fast BSS Transition)
5448          * Action[1] = 1 (Fast BSS Transition Request)
5449          * STA Address
5450          * Target AP Address
5451          * FT IEs
5452          */
5453
5454         data_len = 2 + 2 * ETH_ALEN + ies_len;
5455         data = os_malloc(data_len);
5456         if (data == NULL)
5457                 return -1;
5458         pos = data;
5459         *pos++ = 0x06; /* FT Action category */
5460         *pos++ = action;
5461         os_memcpy(pos, own_addr, ETH_ALEN);
5462         pos += ETH_ALEN;
5463         os_memcpy(pos, target_ap, ETH_ALEN);
5464         pos += ETH_ALEN;
5465         os_memcpy(pos, ies, ies_len);
5466
5467         ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
5468                                              own_addr, drv->bssid,
5469                                              data, data_len);
5470         os_free(data);
5471
5472         return ret;
5473 }
5474
5475
5476 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
5477 {
5478         struct i802_bss *bss = priv;
5479         struct wpa_driver_nl80211_data *drv = bss->drv;
5480         struct nl_msg *msg, *cqm = NULL;
5481
5482         wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
5483                    "hysteresis=%d", threshold, hysteresis);
5484
5485         msg = nlmsg_alloc();
5486         if (!msg)
5487                 return -1;
5488
5489         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5490                     0, NL80211_CMD_SET_CQM, 0);
5491
5492         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
5493
5494         cqm = nlmsg_alloc();
5495         if (cqm == NULL)
5496                 return -1;
5497
5498         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
5499         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
5500         nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
5501
5502         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
5503                 return 0;
5504         msg = NULL;
5505
5506 nla_put_failure:
5507         if (cqm)
5508                 nlmsg_free(cqm);
5509         nlmsg_free(msg);
5510         return -1;
5511 }
5512
5513
5514 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
5515                               int encrypt)
5516 {
5517         struct i802_bss *bss = priv;
5518         struct wpa_driver_nl80211_data *drv = bss->drv;
5519         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
5520 }
5521
5522
5523 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5524         .name = "nl80211",
5525         .desc = "Linux nl80211/cfg80211",
5526         .get_bssid = wpa_driver_nl80211_get_bssid,
5527         .get_ssid = wpa_driver_nl80211_get_ssid,
5528         .set_key = wpa_driver_nl80211_set_key,
5529         .scan2 = wpa_driver_nl80211_scan,
5530         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5531         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5532         .disassociate = wpa_driver_nl80211_disassociate,
5533         .authenticate = wpa_driver_nl80211_authenticate,
5534         .associate = wpa_driver_nl80211_associate,
5535         .init = wpa_driver_nl80211_init,
5536         .deinit = wpa_driver_nl80211_deinit,
5537         .get_capa = wpa_driver_nl80211_get_capa,
5538         .set_operstate = wpa_driver_nl80211_set_operstate,
5539         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5540         .set_country = wpa_driver_nl80211_set_country,
5541         .set_beacon = wpa_driver_nl80211_set_beacon,
5542         .if_add = wpa_driver_nl80211_if_add,
5543         .if_remove = wpa_driver_nl80211_if_remove,
5544         .send_mlme = wpa_driver_nl80211_send_mlme,
5545         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5546         .sta_add = wpa_driver_nl80211_sta_add,
5547         .sta_remove = wpa_driver_nl80211_sta_remove,
5548         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5549         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5550 #ifdef HOSTAPD
5551         .hapd_init = i802_init,
5552         .hapd_deinit = i802_deinit,
5553         .get_seqnum = i802_get_seqnum,
5554         .flush = i802_flush,
5555         .read_sta_data = i802_read_sta_data,
5556         .sta_deauth = i802_sta_deauth,
5557         .sta_disassoc = i802_sta_disassoc,
5558         .get_inact_sec = i802_get_inact_sec,
5559         .sta_clear_stats = i802_sta_clear_stats,
5560         .set_rts = i802_set_rts,
5561         .set_frag = i802_set_frag,
5562         .set_rate_sets = i802_set_rate_sets,
5563         .set_cts_protect = i802_set_cts_protect,
5564         .set_preamble = i802_set_preamble,
5565         .set_short_slot_time = i802_set_short_slot_time,
5566         .set_tx_queue_params = i802_set_tx_queue_params,
5567         .set_sta_vlan = i802_set_sta_vlan,
5568         .set_wds_sta = i802_set_wds_sta,
5569 #endif /* HOSTAPD */
5570         .set_freq = i802_set_freq,
5571         .send_action = wpa_driver_nl80211_send_action,
5572         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5573         .cancel_remain_on_channel =
5574         wpa_driver_nl80211_cancel_remain_on_channel,
5575         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5576         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5577         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5578         .resume = wpa_driver_nl80211_resume,
5579         .send_ft_action = nl80211_send_ft_action,
5580         .signal_monitor = nl80211_signal_monitor,
5581         .send_frame = nl80211_send_frame,
5582 };