src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009-2010, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/genl/ctrl.h>
  25 #include <netpacket/packet.h>
  26 #include <linux/filter.h>
  27 #include "nl80211_copy.h"
  28
  29 #include "common.h"
  30 #include "eloop.h"
  31 #include "common/ieee802_11_defs.h"
  32 #include "netlink.h"
  33 #include "linux_ioctl.h"
  34 #include "radiotap.h"
  35 #include "radiotap_iter.h"
  36 #include "driver.h"
  37
  38 #ifdef CONFIG_LIBNL20
  39 /* libnl 2.0 compatibility code */
  40 #define nl_handle nl_sock
  41 #define nl_handle_alloc_cb nl_socket_alloc_cb
  42 #define nl_handle_destroy nl_socket_free
  43 #endif /* CONFIG_LIBNL20 */
  44
  45
  46 #ifndef IFF_LOWER_UP
  47 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  48 #endif
  49 #ifndef IFF_DORMANT
  50 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  51 #endif
  52
  53 #ifndef IF_OPER_DORMANT
  54 #define IF_OPER_DORMANT 5
  55 #endif
  56 #ifndef IF_OPER_UP
  57 #define IF_OPER_UP 6
  58 #endif
  59
  60 struct i802_bss {
  61         struct wpa_driver_nl80211_data *drv;
  62         struct i802_bss *next;
  63         int ifindex;
  64         char ifname[IFNAMSIZ + 1];
  65         unsigned int beacon_set:1;
  66 };
  67
  68 struct wpa_driver_nl80211_data {
  69         void *ctx;
  70         struct netlink_data *netlink;
  71         int ioctl_sock; /* socket for ioctl() use */
  72         char brname[IFNAMSIZ];
  73         int ifindex;
  74         int if_removed;
  75         struct wpa_driver_capa capa;
  76         int has_capability;
  77
  78         int operstate;
  79
  80         int scan_complete_events;
  81
  82         struct nl_handle *nl_handle;
  83         struct nl_handle *nl_handle_event;
  84         struct nl_cache *nl_cache;
  85         struct nl_cache *nl_cache_event;
  86         struct nl_cb *nl_cb;
  87         struct genl_family *nl80211;
  88
  89         u8 auth_bssid[ETH_ALEN];
  90         u8 bssid[ETH_ALEN];
  91         int associated;
  92         u8 ssid[32];
  93         size_t ssid_len;
  94         int nlmode;
  95         int ap_scan_as_station;
  96         unsigned int assoc_freq;
  97
  98         int monitor_sock;
  99         int monitor_ifidx;
 100         int probe_req_report;
 101         int disable_11b_rates;
 102
 103         unsigned int pending_remain_on_chan:1;
 104         unsigned int pending_send_action:1;
 105         unsigned int added_bridge:1;
 106         unsigned int added_if_into_bridge:1;
 107
 108         u64 remain_on_chan_cookie;
 109         u64 send_action_cookie;
 110
 111         struct wpa_driver_scan_filter *filter_ssids;
 112         size_t num_filter_ssids;
 113
 114         struct i802_bss first_bss;
 115
 116 #ifdef HOSTAPD
 117         int eapol_sock; /* socket for EAPOL frames */
 118
 119         int default_if_indices[16];
 120         int *if_indices;
 121         int num_if_indices;
 122
 123         int last_freq;
 124         int last_freq_ht;
 125 #endif /* HOSTAPD */
 126 };
 127
 128
 129 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 130                                             void *timeout_ctx);
 131 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 132 static int
 133 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 134 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 135                                    const u8 *addr, int cmd, u16 reason_code);
 136 static void nl80211_remove_monitor_interface(
 137         struct wpa_driver_nl80211_data *drv);
 138
 139 #ifdef HOSTAPD
 140 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 141 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 142 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 143 static int wpa_driver_nl80211_if_remove(void *priv,
 144                                         enum wpa_driver_if_type type,
 145                                         const char *ifname);
 146 #endif /* HOSTAPD */
 147
 148 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
 149                                                         void *timeout_ctx);
 150 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
 151                                      int ifindex, int disabled);
 152
 153
 154 /* nl80211 code */
 155 static int ack_handler(struct nl_msg *msg, void *arg)
 156 {
 157         int *err = arg;
 158         *err = 0;
 159         return NL_STOP;
 160 }
 161
 162 static int finish_handler(struct nl_msg *msg, void *arg)
 163 {
 164         int *ret = arg;
 165         *ret = 0;
 166         return NL_SKIP;
 167 }
 168
 169 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 170                          void *arg)
 171 {
 172         int *ret = arg;
 173         *ret = err->error;
 174         return NL_SKIP;
 175 }
 176
 177
 178 static int no_seq_check(struct nl_msg *msg, void *arg)
 179 {
 180         return NL_OK;
 181 }
 182
 183
 184 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
 185                          struct nl_handle *nl_handle, struct nl_msg *msg,
 186                          int (*valid_handler)(struct nl_msg *, void *),
 187                          void *valid_data)
 188 {
 189         struct nl_cb *cb;
 190         int err = -ENOMEM;
 191
 192         cb = nl_cb_clone(drv->nl_cb);
 193         if (!cb)
 194                 goto out;
 195
 196         err = nl_send_auto_complete(nl_handle, msg);
 197         if (err < 0)
 198                 goto out;
 199
 200         err = 1;
 201
 202         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 203         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 204         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 205
 206         if (valid_handler)
 207                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 208                           valid_handler, valid_data);
 209
 210         while (err > 0)
 211                 nl_recvmsgs(nl_handle, cb);
 212  out:
 213         nl_cb_put(cb);
 214         nlmsg_free(msg);
 215         return err;
 216 }
 217
 218
 219 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 220                               struct nl_msg *msg,
 221                               int (*valid_handler)(struct nl_msg *, void *),
 222                               void *valid_data)
 223 {
 224         return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
 225                              valid_data);
 226 }
 227
 228
 229 struct family_data {
 230         const char *group;
 231         int id;
 232 };
 233
 234
 235 static int family_handler(struct nl_msg *msg, void *arg)
 236 {
 237         struct family_data *res = arg;
 238         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 239         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 240         struct nlattr *mcgrp;
 241         int i;
 242
 243         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 244                   genlmsg_attrlen(gnlh, 0), NULL);
 245         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 246                 return NL_SKIP;
 247
 248         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 249                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 250                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 251                           nla_len(mcgrp), NULL);
 252                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 253                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 254                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 255                                res->group,
 256                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 257                         continue;
 258                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 259                 break;
 260         };
 261
 262         return NL_SKIP;
 263 }
 264
 265
 266 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 267                                const char *family, const char *group)
 268 {
 269         struct nl_msg *msg;
 270         int ret = -1;
 271         struct family_data res = { group, -ENOENT };
 272
 273         msg = nlmsg_alloc();
 274         if (!msg)
 275                 return -ENOMEM;
 276         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 277                     0, 0, CTRL_CMD_GETFAMILY, 0);
 278         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 279
 280         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 281         msg = NULL;
 282         if (ret == 0)
 283                 ret = res.id;
 284
 285 nla_put_failure:
 286         nlmsg_free(msg);
 287         return ret;
 288 }
 289
 290
 291 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 292 {
 293         struct i802_bss *bss = priv;
 294         struct wpa_driver_nl80211_data *drv = bss->drv;
 295         if (!drv->associated)
 296                 return -1;
 297         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 298         return 0;
 299 }
 300
 301
 302 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 303 {
 304         struct i802_bss *bss = priv;
 305         struct wpa_driver_nl80211_data *drv = bss->drv;
 306         if (!drv->associated)
 307                 return -1;
 308         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 309         return drv->ssid_len;
 310 }
 311
 312
 313 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 314                                           char *buf, size_t len, int del)
 315 {
 316         union wpa_event_data event;
 317
 318         os_memset(&event, 0, sizeof(event));
 319         if (len > sizeof(event.interface_status.ifname))
 320                 len = sizeof(event.interface_status.ifname) - 1;
 321         os_memcpy(event.interface_status.ifname, buf, len);
 322         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 323                 EVENT_INTERFACE_ADDED;
 324
 325         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 326                    del ? "DEL" : "NEW",
 327                    event.interface_status.ifname,
 328                    del ? "removed" : "added");
 329
 330         if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
 331                 if (del)
 332                         drv->if_removed = 1;
 333                 else
 334                         drv->if_removed = 0;
 335         }
 336
 337         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 338 }
 339
 340
 341 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 342                                          u8 *buf, size_t len)
 343 {
 344         int attrlen, rta_len;
 345         struct rtattr *attr;
 346
 347         attrlen = len;
 348         attr = (struct rtattr *) buf;
 349
 350         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 351         while (RTA_OK(attr, attrlen)) {
 352                 if (attr->rta_type == IFLA_IFNAME) {
 353                         if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
 354                             == 0)
 355                                 return 1;
 356                         else
 357                                 break;
 358                 }
 359                 attr = RTA_NEXT(attr, attrlen);
 360         }
 361
 362         return 0;
 363 }
 364
 365
 366 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 367                                           int ifindex, u8 *buf, size_t len)
 368 {
 369         if (drv->ifindex == ifindex)
 370                 return 1;
 371
 372         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 373                 drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
 374                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 375                            "interface");
 376                 wpa_driver_nl80211_finish_drv_init(drv);
 377                 return 1;
 378         }
 379
 380         return 0;
 381 }
 382
 383
 384 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 385                                                  struct ifinfomsg *ifi,
 386                                                  u8 *buf, size_t len)
 387 {
 388         struct wpa_driver_nl80211_data *drv = ctx;
 389         int attrlen, rta_len;
 390         struct rtattr *attr;
 391
 392         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 393                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 394                            ifi->ifi_index);
 395                 return;
 396         }
 397
 398         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 399                    "(%s%s%s%s)",
 400                    drv->operstate, ifi->ifi_flags,
 401                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 402                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 403                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 404                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 405         /*
 406          * Some drivers send the association event before the operup event--in
 407          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 408          * fails. This will hit us when wpa_supplicant does not need to do
 409          * IEEE 802.1X authentication
 410          */
 411         if (drv->operstate == 1 &&
 412             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 413             !(ifi->ifi_flags & IFF_RUNNING))
 414                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 415                                        -1, IF_OPER_UP);
 416
 417         attrlen = len;
 418         attr = (struct rtattr *) buf;
 419         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 420         while (RTA_OK(attr, attrlen)) {
 421                 if (attr->rta_type == IFLA_IFNAME) {
 422                         wpa_driver_nl80211_event_link(
 423                                 drv,
 424                                 ((char *) attr) + rta_len,
 425                                 attr->rta_len - rta_len, 0);
 426                 }
 427                 attr = RTA_NEXT(attr, attrlen);
 428         }
 429 }
 430
 431
 432 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 433                                                  struct ifinfomsg *ifi,
 434                                                  u8 *buf, size_t len)
 435 {
 436         struct wpa_driver_nl80211_data *drv = ctx;
 437         int attrlen, rta_len;
 438         struct rtattr *attr;
 439
 440         attrlen = len;
 441         attr = (struct rtattr *) buf;
 442
 443         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 444         while (RTA_OK(attr, attrlen)) {
 445                 if (attr->rta_type == IFLA_IFNAME) {
 446                         wpa_driver_nl80211_event_link(
 447                                 drv,
 448                                 ((char *) attr) + rta_len,
 449                                 attr->rta_len - rta_len, 1);
 450                 }
 451                 attr = RTA_NEXT(attr, attrlen);
 452         }
 453 }
 454
 455
 456 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 457                             const u8 *frame, size_t len)
 458 {
 459         const struct ieee80211_mgmt *mgmt;
 460         union wpa_event_data event;
 461
 462         mgmt = (const struct ieee80211_mgmt *) frame;
 463         if (len < 24 + sizeof(mgmt->u.auth)) {
 464                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 465                            "frame");
 466                 return;
 467         }
 468
 469         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 470         os_memset(&event, 0, sizeof(event));
 471         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 472         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 473         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 474         if (len > 24 + sizeof(mgmt->u.auth)) {
 475                 event.auth.ies = mgmt->u.auth.variable;
 476                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 477         }
 478
 479         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 480 }
 481
 482
 483 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 484                             const u8 *frame, size_t len)
 485 {
 486         const struct ieee80211_mgmt *mgmt;
 487         union wpa_event_data event;
 488         u16 status;
 489
 490         mgmt = (const struct ieee80211_mgmt *) frame;
 491         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 492                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 493                            "frame");
 494                 return;
 495         }
 496
 497         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 498         if (status != WLAN_STATUS_SUCCESS) {
 499                 os_memset(&event, 0, sizeof(event));
 500                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 501                         event.assoc_reject.resp_ies =
 502                                 (u8 *) mgmt->u.assoc_resp.variable;
 503                         event.assoc_reject.resp_ies_len =
 504                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 505                 }
 506                 event.assoc_reject.status_code = status;
 507
 508                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 509                 return;
 510         }
 511
 512         drv->associated = 1;
 513         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 514
 515         os_memset(&event, 0, sizeof(event));
 516         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 517                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 518                 event.assoc_info.resp_ies_len =
 519                         len - 24 - sizeof(mgmt->u.assoc_resp);
 520         }
 521
 522         event.assoc_info.freq = drv->assoc_freq;
 523
 524         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 525 }
 526
 527
 528 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 529                                enum nl80211_commands cmd, struct nlattr *status,
 530                                struct nlattr *addr, struct nlattr *req_ie,
 531                                struct nlattr *resp_ie)
 532 {
 533         union wpa_event_data event;
 534
 535         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 536                 /*
 537                  * Avoid reporting two association events that would confuse
 538                  * the core code.
 539                  */
 540                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 541                            "when using userspace SME", cmd);
 542                 return;
 543         }
 544
 545         os_memset(&event, 0, sizeof(event));
 546         if (cmd == NL80211_CMD_CONNECT &&
 547             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 548                 if (resp_ie) {
 549                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 550                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 551                 }
 552                 event.assoc_reject.status_code = nla_get_u16(status);
 553                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 554                 return;
 555         }
 556
 557         drv->associated = 1;
 558         if (addr)
 559                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 560
 561         if (req_ie) {
 562                 event.assoc_info.req_ies = nla_data(req_ie);
 563                 event.assoc_info.req_ies_len = nla_len(req_ie);
 564         }
 565         if (resp_ie) {
 566                 event.assoc_info.resp_ies = nla_data(resp_ie);
 567                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 568         }
 569
 570         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 571 }
 572
 573
 574 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 575                                enum nl80211_commands cmd, struct nlattr *addr)
 576 {
 577         union wpa_event_data event;
 578         enum wpa_event_type ev;
 579
 580         if (nla_len(addr) != ETH_ALEN)
 581                 return;
 582
 583         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 584                    cmd, MAC2STR((u8 *) nla_data(addr)));
 585
 586         if (cmd == NL80211_CMD_AUTHENTICATE)
 587                 ev = EVENT_AUTH_TIMED_OUT;
 588         else if (cmd == NL80211_CMD_ASSOCIATE)
 589                 ev = EVENT_ASSOC_TIMED_OUT;
 590         else
 591                 return;
 592
 593         os_memset(&event, 0, sizeof(event));
 594         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 595         wpa_supplicant_event(drv->ctx, ev, &event);
 596 }
 597
 598
 599 static void mlme_event_action(struct wpa_driver_nl80211_data *drv,
 600                               struct nlattr *freq, const u8 *frame, size_t len)
 601 {
 602         const struct ieee80211_mgmt *mgmt;
 603         union wpa_event_data event;
 604         u16 fc, stype;
 605
 606         mgmt = (const struct ieee80211_mgmt *) frame;
 607         if (len < 24) {
 608                 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
 609                 return;
 610         }
 611
 612         fc = le_to_host16(mgmt->frame_control);
 613         stype = WLAN_FC_GET_STYPE(fc);
 614
 615         os_memset(&event, 0, sizeof(event));
 616         event.rx_action.da = mgmt->da;
 617         event.rx_action.sa = mgmt->sa;
 618         event.rx_action.bssid = mgmt->bssid;
 619         event.rx_action.category = mgmt->u.action.category;
 620         event.rx_action.data = &mgmt->u.action.category + 1;
 621         event.rx_action.len = frame + len - event.rx_action.data;
 622         if (freq)
 623                 event.rx_action.freq = nla_get_u32(freq);
 624         wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
 625 }
 626
 627
 628 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
 629                                         struct nlattr *cookie, const u8 *frame,
 630                                         size_t len, struct nlattr *ack)
 631 {
 632         union wpa_event_data event;
 633         const struct ieee80211_hdr *hdr;
 634         u16 fc;
 635         u64 cookie_val;
 636
 637         if (!cookie)
 638                 return;
 639
 640         cookie_val = nla_get_u64(cookie);
 641         wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s",
 642                    (long long unsigned int) cookie_val,
 643                    cookie_val == drv->send_action_cookie ?
 644                    " (match)" : " (unknown)");
 645         if (cookie_val != drv->send_action_cookie)
 646                 return;
 647
 648         hdr = (const struct ieee80211_hdr *) frame;
 649         fc = le_to_host16(hdr->frame_control);
 650
 651         os_memset(&event, 0, sizeof(event));
 652         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
 653         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
 654         event.tx_status.dst = hdr->addr1;
 655         event.tx_status.data = frame;
 656         event.tx_status.data_len = len;
 657         event.tx_status.ack = ack != NULL;
 658         wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
 659 }
 660
 661
 662 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 663                        enum nl80211_commands cmd, struct nlattr *frame,
 664                        struct nlattr *addr, struct nlattr *timed_out,
 665                        struct nlattr *freq, struct nlattr *ack,
 666                        struct nlattr *cookie)
 667 {
 668         if (timed_out && addr) {
 669                 mlme_timeout_event(drv, cmd, addr);
 670                 return;
 671         }
 672
 673         if (frame == NULL) {
 674                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 675                            "data", cmd);
 676                 return;
 677         }
 678
 679         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 680         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 681                     nla_data(frame), nla_len(frame));
 682
 683         switch (cmd) {
 684         case NL80211_CMD_AUTHENTICATE:
 685                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 686                 break;
 687         case NL80211_CMD_ASSOCIATE:
 688                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 689                 break;
 690         case NL80211_CMD_DEAUTHENTICATE:
 691                 drv->associated = 0;
 692                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 693                 break;
 694         case NL80211_CMD_DISASSOCIATE:
 695                 drv->associated = 0;
 696                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 697                 break;
 698         case NL80211_CMD_ACTION:
 699                 mlme_event_action(drv, freq, nla_data(frame), nla_len(frame));
 700                 break;
 701         case NL80211_CMD_ACTION_TX_STATUS:
 702                 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
 703                                             nla_len(frame), ack);
 704                 break;
 705         default:
 706                 break;
 707         }
 708 }
 709
 710
 711 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 712                                            struct nlattr *tb[])
 713 {
 714         union wpa_event_data data;
 715
 716         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 717         os_memset(&data, 0, sizeof(data));
 718         if (tb[NL80211_ATTR_MAC]) {
 719                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 720                             nla_data(tb[NL80211_ATTR_MAC]),
 721                             nla_len(tb[NL80211_ATTR_MAC]));
 722                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 723         }
 724         if (tb[NL80211_ATTR_KEY_SEQ]) {
 725                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 726                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 727                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 728         }
 729         if (tb[NL80211_ATTR_KEY_TYPE]) {
 730                 enum nl80211_key_type key_type =
 731                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 732                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 733                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 734                         data.michael_mic_failure.unicast = 1;
 735         } else
 736                 data.michael_mic_failure.unicast = 1;
 737
 738         if (tb[NL80211_ATTR_KEY_IDX]) {
 739                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 740                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 741         }
 742
 743         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 744 }
 745
 746
 747 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 748                                  struct nlattr *tb[])
 749 {
 750         if (tb[NL80211_ATTR_MAC] == NULL) {
 751                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 752                            "event");
 753                 return;
 754         }
 755         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 756         drv->associated = 1;
 757         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 758                    MAC2STR(drv->bssid));
 759
 760         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 761 }
 762
 763
 764 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
 765                                          int cancel_event, struct nlattr *tb[])
 766 {
 767         unsigned int freq, chan_type, duration;
 768         union wpa_event_data data;
 769         u64 cookie;
 770
 771         if (tb[NL80211_ATTR_WIPHY_FREQ])
 772                 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 773         else
 774                 freq = 0;
 775
 776         if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
 777                 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 778         else
 779                 chan_type = 0;
 780
 781         if (tb[NL80211_ATTR_DURATION])
 782                 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
 783         else
 784                 duration = 0;
 785
 786         if (tb[NL80211_ATTR_COOKIE])
 787                 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
 788         else
 789                 cookie = 0;
 790
 791         wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
 792                    "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
 793                    cancel_event, freq, chan_type, duration,
 794                    (long long unsigned int) cookie,
 795                    cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
 796
 797         if (cookie != drv->remain_on_chan_cookie)
 798                 return; /* not for us */
 799
 800         drv->pending_remain_on_chan = !cancel_event;
 801
 802         os_memset(&data, 0, sizeof(data));
 803         data.remain_on_channel.freq = freq;
 804         data.remain_on_channel.duration = duration;
 805         wpa_supplicant_event(drv->ctx, cancel_event ?
 806                              EVENT_CANCEL_REMAIN_ON_CHANNEL :
 807                              EVENT_REMAIN_ON_CHANNEL, &data);
 808 }
 809
 810
 811 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 812                             struct nlattr *tb[])
 813 {
 814         union wpa_event_data event;
 815         struct nlattr *nl;
 816         int rem;
 817         struct scan_info *info;
 818 #define MAX_REPORT_FREQS 50
 819         int freqs[MAX_REPORT_FREQS];
 820         int num_freqs = 0;
 821
 822         os_memset(&event, 0, sizeof(event));
 823         info = &event.scan_info;
 824         info->aborted = aborted;
 825
 826         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 827                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
 828                         struct wpa_driver_scan_ssid *s =
 829                                 &info->ssids[info->num_ssids];
 830                         s->ssid = nla_data(nl);
 831                         s->ssid_len = nla_len(nl);
 832                         info->num_ssids++;
 833                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
 834                                 break;
 835                 }
 836         }
 837         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 838                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
 839                 {
 840                         freqs[num_freqs] = nla_get_u32(nl);
 841                         num_freqs++;
 842                         if (num_freqs == MAX_REPORT_FREQS - 1)
 843                                 break;
 844                 }
 845                 info->freqs = freqs;
 846                 info->num_freqs = num_freqs;
 847         }
 848         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
 849 }
 850
 851
 852 static int process_event(struct nl_msg *msg, void *arg)
 853 {
 854         struct wpa_driver_nl80211_data *drv = arg;
 855         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 856         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 857
 858         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 859                   genlmsg_attrlen(gnlh, 0), NULL);
 860
 861         if (tb[NL80211_ATTR_IFINDEX]) {
 862                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 863                 if (ifindex != drv->ifindex) {
 864                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 865                                    " for foreign interface (ifindex %d)",
 866                                    gnlh->cmd, ifindex);
 867                         return NL_SKIP;
 868                 }
 869         }
 870
 871         if (drv->ap_scan_as_station &&
 872             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 873              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 874                 wpa_driver_nl80211_set_mode(&drv->first_bss,
 875                                             IEEE80211_MODE_AP);
 876                 drv->ap_scan_as_station = 0;
 877         }
 878
 879         switch (gnlh->cmd) {
 880         case NL80211_CMD_TRIGGER_SCAN:
 881                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 882                 break;
 883         case NL80211_CMD_NEW_SCAN_RESULTS:
 884                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 885                 drv->scan_complete_events = 1;
 886                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 887                                      drv->ctx);
 888                 send_scan_event(drv, 0, tb);
 889                 break;
 890         case NL80211_CMD_SCAN_ABORTED:
 891                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 892                 /*
 893                  * Need to indicate that scan results are available in order
 894                  * not to make wpa_supplicant stop its scanning.
 895                  */
 896                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 897                                      drv->ctx);
 898                 send_scan_event(drv, 1, tb);
 899                 break;
 900         case NL80211_CMD_AUTHENTICATE:
 901         case NL80211_CMD_ASSOCIATE:
 902         case NL80211_CMD_DEAUTHENTICATE:
 903         case NL80211_CMD_DISASSOCIATE:
 904         case NL80211_CMD_ACTION:
 905         case NL80211_CMD_ACTION_TX_STATUS:
 906                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 907                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
 908                            tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
 909                            tb[NL80211_ATTR_COOKIE]);
 910                 break;
 911         case NL80211_CMD_CONNECT:
 912         case NL80211_CMD_ROAM:
 913                 mlme_event_connect(drv, gnlh->cmd,
 914                                    tb[NL80211_ATTR_STATUS_CODE],
 915                                    tb[NL80211_ATTR_MAC],
 916                                    tb[NL80211_ATTR_REQ_IE],
 917                                    tb[NL80211_ATTR_RESP_IE]);
 918                 break;
 919         case NL80211_CMD_DISCONNECT:
 920                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 921                         /*
 922                          * Avoid reporting two disassociation events that could
 923                          * confuse the core code.
 924                          */
 925                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 926                                    "event when using userspace SME");
 927                         break;
 928                 }
 929                 drv->associated = 0;
 930                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 931                 break;
 932         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 933                 mlme_event_michael_mic_failure(drv, tb);
 934                 break;
 935         case NL80211_CMD_JOIN_IBSS:
 936                 mlme_event_join_ibss(drv, tb);
 937                 break;
 938         case NL80211_CMD_REMAIN_ON_CHANNEL:
 939                 mlme_event_remain_on_channel(drv, 0, tb);
 940                 break;
 941         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
 942                 mlme_event_remain_on_channel(drv, 1, tb);
 943                 break;
 944         default:
 945                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 946                            "(cmd=%d)", gnlh->cmd);
 947                 break;
 948         }
 949
 950         return NL_SKIP;
 951 }
 952
 953
 954 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 955                                              void *sock_ctx)
 956 {
 957         struct nl_cb *cb;
 958         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 959
 960         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 961
 962         cb = nl_cb_clone(drv->nl_cb);
 963         if (!cb)
 964                 return;
 965         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 966         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 967         nl_recvmsgs(drv->nl_handle_event, cb);
 968         nl_cb_put(cb);
 969 }
 970
 971
 972 /**
 973  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 974  * @priv: driver_nl80211 private data
 975  * @alpha2_arg: country to which to switch to
 976  * Returns: 0 on success, -1 on failure
 977  *
 978  * This asks nl80211 to set the regulatory domain for given
 979  * country ISO / IEC alpha2.
 980  */
 981 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 982 {
 983         struct i802_bss *bss = priv;
 984         struct wpa_driver_nl80211_data *drv = bss->drv;
 985         char alpha2[3];
 986         struct nl_msg *msg;
 987
 988         msg = nlmsg_alloc();
 989         if (!msg)
 990                 return -ENOMEM;
 991
 992         alpha2[0] = alpha2_arg[0];
 993         alpha2[1] = alpha2_arg[1];
 994         alpha2[2] = '\0';
 995
 996         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 997                     0, NL80211_CMD_REQ_SET_REG, 0);
 998
 999         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1000         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1001                 return -EINVAL;
1002         return 0;
1003 nla_put_failure:
1004         return -EINVAL;
1005 }
1006
1007
1008 #ifndef HOSTAPD
1009 struct wiphy_info_data {
1010         int max_scan_ssids;
1011         int ap_supported;
1012         int auth_supported;
1013         int connect_supported;
1014 };
1015
1016
1017 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1018 {
1019         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1020         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1021         struct wiphy_info_data *info = arg;
1022
1023         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1024                   genlmsg_attrlen(gnlh, 0), NULL);
1025
1026         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1027                 info->max_scan_ssids =
1028                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1029
1030         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1031                 struct nlattr *nl_mode;
1032                 int i;
1033                 nla_for_each_nested(nl_mode,
1034                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1035                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1036                                 info->ap_supported = 1;
1037                                 break;
1038                         }
1039                 }
1040         }
1041
1042         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1043                 struct nlattr *nl_cmd;
1044                 int i;
1045
1046                 nla_for_each_nested(nl_cmd,
1047                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1048                         u32 cmd = nla_get_u32(nl_cmd);
1049                         if (cmd == NL80211_CMD_AUTHENTICATE)
1050                                 info->auth_supported = 1;
1051                         else if (cmd == NL80211_CMD_CONNECT)
1052                                 info->connect_supported = 1;
1053                 }
1054         }
1055
1056         return NL_SKIP;
1057 }
1058
1059
1060 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1061                                        struct wiphy_info_data *info)
1062 {
1063         struct nl_msg *msg;
1064
1065         os_memset(info, 0, sizeof(*info));
1066         msg = nlmsg_alloc();
1067         if (!msg)
1068                 return -1;
1069
1070         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1071                     0, NL80211_CMD_GET_WIPHY, 0);
1072
1073         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1074
1075         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1076                 return 0;
1077         msg = NULL;
1078 nla_put_failure:
1079         nlmsg_free(msg);
1080         return -1;
1081 }
1082
1083
1084 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1085 {
1086         struct wiphy_info_data info;
1087         if (wpa_driver_nl80211_get_info(drv, &info))
1088                 return -1;
1089         drv->has_capability = 1;
1090         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1091         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1092                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1093                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1094                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1095         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1096                 WPA_DRIVER_CAPA_ENC_WEP104 |
1097                 WPA_DRIVER_CAPA_ENC_TKIP |
1098                 WPA_DRIVER_CAPA_ENC_CCMP;
1099         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1100                 WPA_DRIVER_AUTH_SHARED |
1101                 WPA_DRIVER_AUTH_LEAP;
1102
1103         drv->capa.max_scan_ssids = info.max_scan_ssids;
1104         if (info.ap_supported)
1105                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1106
1107         if (info.auth_supported)
1108                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1109         else if (!info.connect_supported) {
1110                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1111                            "authentication/association or connect commands");
1112                 return -1;
1113         }
1114
1115         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1116
1117         return 0;
1118 }
1119 #endif /* HOSTAPD */
1120
1121
1122 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1123                                       void *ctx)
1124 {
1125         int ret;
1126
1127         /* Initialize generic netlink and nl80211 */
1128
1129         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1130         if (drv->nl_cb == NULL) {
1131                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1132                            "callbacks");
1133                 goto err1;
1134         }
1135
1136         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1137         if (drv->nl_handle == NULL) {
1138                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1139                            "callbacks");
1140                 goto err2;
1141         }
1142
1143         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1144         if (drv->nl_handle_event == NULL) {
1145                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1146                            "callbacks (event)");
1147                 goto err2b;
1148         }
1149
1150         if (genl_connect(drv->nl_handle)) {
1151                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1152                            "netlink");
1153                 goto err3;
1154         }
1155
1156         if (genl_connect(drv->nl_handle_event)) {
1157                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1158                            "netlink (event)");
1159                 goto err3;
1160         }
1161
1162 #ifdef CONFIG_LIBNL20
1163         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1164                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1165                            "netlink cache");
1166                 goto err3;
1167         }
1168         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1169             0) {
1170                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1171                            "netlink cache (event)");
1172                 goto err3b;
1173         }
1174 #else /* CONFIG_LIBNL20 */
1175         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1176         if (drv->nl_cache == NULL) {
1177                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1178                            "netlink cache");
1179                 goto err3;
1180         }
1181         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1182         if (drv->nl_cache_event == NULL) {
1183                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1184                            "netlink cache (event)");
1185                 goto err3b;
1186         }
1187 #endif /* CONFIG_LIBNL20 */
1188
1189         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1190         if (drv->nl80211 == NULL) {
1191                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1192                            "found");
1193                 goto err4;
1194         }
1195
1196         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1197         if (ret >= 0)
1198                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1199         if (ret < 0) {
1200                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1201                            "membership for scan events: %d (%s)",
1202                            ret, strerror(-ret));
1203                 goto err4;
1204         }
1205
1206         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1207         if (ret >= 0)
1208                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1209         if (ret < 0) {
1210                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1211                            "membership for mlme events: %d (%s)",
1212                            ret, strerror(-ret));
1213                 goto err4;
1214         }
1215
1216         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1217                                  wpa_driver_nl80211_event_receive, drv, ctx);
1218
1219         return 0;
1220
1221 err4:
1222         nl_cache_free(drv->nl_cache_event);
1223 err3b:
1224         nl_cache_free(drv->nl_cache);
1225 err3:
1226         nl_handle_destroy(drv->nl_handle_event);
1227 err2b:
1228         nl_handle_destroy(drv->nl_handle);
1229 err2:
1230         nl_cb_put(drv->nl_cb);
1231 err1:
1232         return -1;
1233 }
1234
1235
1236 /**
1237  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1238  * @ctx: context to be used when calling wpa_supplicant functions,
1239  * e.g., wpa_supplicant_event()
1240  * @ifname: interface name, e.g., wlan0
1241  * Returns: Pointer to private data, %NULL on failure
1242  */
1243 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1244 {
1245         struct wpa_driver_nl80211_data *drv;
1246         struct netlink_config *cfg;
1247         struct i802_bss *bss;
1248
1249         drv = os_zalloc(sizeof(*drv));
1250         if (drv == NULL)
1251                 return NULL;
1252         drv->ctx = ctx;
1253         bss = &drv->first_bss;
1254         bss->drv = drv;
1255         os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
1256         drv->monitor_ifidx = -1;
1257         drv->monitor_sock = -1;
1258         drv->ioctl_sock = -1;
1259
1260         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1261                 os_free(drv);
1262                 return NULL;
1263         }
1264
1265         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1266         if (drv->ioctl_sock < 0) {
1267                 perror("socket(PF_INET,SOCK_DGRAM)");
1268                 goto failed;
1269         }
1270
1271         cfg = os_zalloc(sizeof(*cfg));
1272         if (cfg == NULL)
1273                 goto failed;
1274         cfg->ctx = drv;
1275         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1276         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1277         drv->netlink = netlink_init(cfg);
1278         if (drv->netlink == NULL) {
1279                 os_free(cfg);
1280                 goto failed;
1281         }
1282         if (wpa_driver_nl80211_finish_drv_init(drv))
1283                 goto failed;
1284
1285         return bss;
1286
1287 failed:
1288         netlink_deinit(drv->netlink);
1289         if (drv->ioctl_sock >= 0)
1290                 close(drv->ioctl_sock);
1291
1292         genl_family_put(drv->nl80211);
1293         nl_cache_free(drv->nl_cache);
1294         nl_handle_destroy(drv->nl_handle);
1295         nl_cb_put(drv->nl_cb);
1296         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1297
1298         os_free(drv);
1299         return NULL;
1300 }
1301
1302
1303 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1304                                          const u8 *match, size_t match_len)
1305 {
1306         struct nl_msg *msg;
1307         int ret = -1;
1308
1309         msg = nlmsg_alloc();
1310         if (!msg)
1311                 return -1;
1312
1313         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1314                     NL80211_CMD_REGISTER_ACTION, 0);
1315
1316         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1317         NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1318
1319         ret = send_and_recv(drv, drv->nl_handle_event, msg, NULL, NULL);
1320         msg = NULL;
1321         if (ret) {
1322                 wpa_printf(MSG_DEBUG, "nl80211: Register Action command "
1323                            "failed: ret=%d (%s)", ret, strerror(-ret));
1324                 wpa_hexdump(MSG_DEBUG, "nl80211: Register Action match",
1325                             match, match_len);
1326                 goto nla_put_failure;
1327         }
1328         ret = 0;
1329 nla_put_failure:
1330         nlmsg_free(msg);
1331         return ret;
1332 }
1333
1334
1335 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1336 {
1337         if (0) {
1338                 /* Public Action frames */
1339                 return nl80211_register_action_frame(drv, (u8 *) "\x04", 1);
1340         }
1341
1342         /* FT Action frames */
1343         if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
1344                 return -1;
1345         else
1346                 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
1347                         WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
1348
1349         return 0;
1350 }
1351
1352
1353 static int
1354 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1355 {
1356         struct i802_bss *bss = &drv->first_bss;
1357
1358         drv->ifindex = if_nametoindex(bss->ifname);
1359         drv->first_bss.ifindex = drv->ifindex;
1360
1361 #ifndef HOSTAPD
1362         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
1363                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1364                            "use managed mode");
1365         }
1366
1367         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
1368                 wpa_printf(MSG_ERROR, "Could not set interface '%s' UP",
1369                            bss->ifname);
1370                 return -1;
1371         }
1372
1373         if (wpa_driver_nl80211_capa(drv))
1374                 return -1;
1375
1376         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1377                                1, IF_OPER_DORMANT);
1378 #endif /* HOSTAPD */
1379
1380         if (nl80211_register_action_frames(drv) < 0) {
1381                 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
1382                            "frame processing - ignore for now");
1383                 /*
1384                  * Older kernel versions did not support this, so ignore the
1385                  * error for now. Some functionality may not be available
1386                  * because of this.
1387                  */
1388         }
1389
1390         return 0;
1391 }
1392
1393
1394 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1395 {
1396         struct nl_msg *msg;
1397
1398         msg = nlmsg_alloc();
1399         if (!msg)
1400                 return -ENOMEM;
1401
1402         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1403                     0, NL80211_CMD_DEL_BEACON, 0);
1404         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1405
1406         return send_and_recv_msgs(drv, msg, NULL, NULL);
1407  nla_put_failure:
1408         return -ENOBUFS;
1409 }
1410
1411
1412 /**
1413  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1414  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1415  *
1416  * Shut down driver interface and processing of driver events. Free
1417  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1418  */
1419 static void wpa_driver_nl80211_deinit(void *priv)
1420 {
1421         struct i802_bss *bss = priv;
1422         struct wpa_driver_nl80211_data *drv = bss->drv;
1423
1424         if (drv->added_if_into_bridge) {
1425                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
1426                     < 0)
1427                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1428                                    "interface %s from bridge %s: %s",
1429                                    bss->ifname, drv->brname, strerror(errno));
1430         }
1431         if (drv->added_bridge) {
1432                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1433                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1434                                    "bridge %s: %s",
1435                                    drv->brname, strerror(errno));
1436         }
1437
1438         nl80211_remove_monitor_interface(drv);
1439
1440         if (drv->nlmode == NL80211_IFTYPE_AP)
1441                 wpa_driver_nl80211_del_beacon(drv);
1442
1443 #ifdef HOSTAPD
1444         if (drv->last_freq_ht) {
1445                 /* Clear HT flags from the driver */
1446                 struct hostapd_freq_params freq;
1447                 os_memset(&freq, 0, sizeof(freq));
1448                 freq.freq = drv->last_freq;
1449                 i802_set_freq(priv, &freq);
1450         }
1451
1452         if (drv->eapol_sock >= 0) {
1453                 eloop_unregister_read_sock(drv->eapol_sock);
1454                 close(drv->eapol_sock);
1455         }
1456
1457         if (drv->if_indices != drv->default_if_indices)
1458                 os_free(drv->if_indices);
1459 #endif /* HOSTAPD */
1460
1461         if (drv->disable_11b_rates)
1462                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1463
1464         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1465         netlink_deinit(drv->netlink);
1466
1467         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1468
1469         (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
1470         wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
1471
1472         if (drv->ioctl_sock >= 0)
1473                 close(drv->ioctl_sock);
1474
1475         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1476         genl_family_put(drv->nl80211);
1477         nl_cache_free(drv->nl_cache);
1478         nl_cache_free(drv->nl_cache_event);
1479         nl_handle_destroy(drv->nl_handle);
1480         nl_handle_destroy(drv->nl_handle_event);
1481         nl_cb_put(drv->nl_cb);
1482
1483         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1484                              drv, NULL);
1485
1486         os_free(drv->filter_ssids);
1487
1488         os_free(drv);
1489 }
1490
1491
1492 /**
1493  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1494  * @eloop_ctx: Driver private data
1495  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1496  *
1497  * This function can be used as registered timeout when starting a scan to
1498  * generate a scan completed event if the driver does not report this.
1499  */
1500 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1501 {
1502         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1503         if (drv->ap_scan_as_station) {
1504                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1505                                             IEEE80211_MODE_AP);
1506                 drv->ap_scan_as_station = 0;
1507         }
1508         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1509         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1510 }
1511
1512
1513 /**
1514  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1515  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1516  * @params: Scan parameters
1517  * Returns: 0 on success, -1 on failure
1518  */
1519 static int wpa_driver_nl80211_scan(void *priv,
1520                                    struct wpa_driver_scan_params *params)
1521 {
1522         struct i802_bss *bss = priv;
1523         struct wpa_driver_nl80211_data *drv = bss->drv;
1524         int ret = 0, timeout;
1525         struct nl_msg *msg, *ssids, *freqs;
1526         size_t i;
1527
1528         msg = nlmsg_alloc();
1529         ssids = nlmsg_alloc();
1530         freqs = nlmsg_alloc();
1531         if (!msg || !ssids || !freqs) {
1532                 nlmsg_free(msg);
1533                 nlmsg_free(ssids);
1534                 nlmsg_free(freqs);
1535                 return -1;
1536         }
1537
1538         os_free(drv->filter_ssids);
1539         drv->filter_ssids = params->filter_ssids;
1540         params->filter_ssids = NULL;
1541         drv->num_filter_ssids = params->num_filter_ssids;
1542
1543         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1544                     NL80211_CMD_TRIGGER_SCAN, 0);
1545
1546         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1547
1548         for (i = 0; i < params->num_ssids; i++) {
1549                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1550                         params->ssids[i].ssid);
1551         }
1552         if (params->num_ssids)
1553                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1554
1555         if (params->extra_ies) {
1556                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1557                         params->extra_ies);
1558         }
1559
1560         if (params->freqs) {
1561                 for (i = 0; params->freqs[i]; i++)
1562                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1563                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1564         }
1565
1566         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1567         msg = NULL;
1568         if (ret) {
1569                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1570                            "(%s)", ret, strerror(-ret));
1571 #ifdef HOSTAPD
1572                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1573                         /*
1574                          * mac80211 does not allow scan requests in AP mode, so
1575                          * try to do this in station mode.
1576                          */
1577                         if (wpa_driver_nl80211_set_mode(bss,
1578                                                         IEEE80211_MODE_INFRA))
1579                                 goto nla_put_failure;
1580
1581                         if (wpa_driver_nl80211_scan(drv, params)) {
1582                                 wpa_driver_nl80211_set_mode(bss,
1583                                                             IEEE80211_MODE_AP);
1584                                 goto nla_put_failure;
1585                         }
1586
1587                         /* Restore AP mode when processing scan results */
1588                         drv->ap_scan_as_station = 1;
1589                         ret = 0;
1590                 } else
1591                         goto nla_put_failure;
1592 #else /* HOSTAPD */
1593                 goto nla_put_failure;
1594 #endif /* HOSTAPD */
1595         }
1596
1597         /* Not all drivers generate "scan completed" wireless event, so try to
1598          * read results after a timeout. */
1599         timeout = 10;
1600         if (drv->scan_complete_events) {
1601                 /*
1602                  * The driver seems to deliver events to notify when scan is
1603                  * complete, so use longer timeout to avoid race conditions
1604                  * with scanning and following association request.
1605                  */
1606                 timeout = 30;
1607         }
1608         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1609                    "seconds", ret, timeout);
1610         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1611         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1612                                drv, drv->ctx);
1613
1614 nla_put_failure:
1615         nlmsg_free(ssids);
1616         nlmsg_free(msg);
1617         nlmsg_free(freqs);
1618         return ret;
1619 }
1620
1621
1622 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
1623 {
1624         const u8 *end, *pos;
1625
1626         if (ies == NULL)
1627                 return NULL;
1628
1629         pos = ies;
1630         end = ies + ies_len;
1631
1632         while (pos + 1 < end) {
1633                 if (pos + 2 + pos[1] > end)
1634                         break;
1635                 if (pos[0] == ie)
1636                         return pos;
1637                 pos += 2 + pos[1];
1638         }
1639
1640         return NULL;
1641 }
1642
1643
1644 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
1645                                  const u8 *ie, size_t ie_len)
1646 {
1647         const u8 *ssid;
1648         size_t i;
1649
1650         if (drv->filter_ssids == NULL)
1651                 return 0;
1652
1653         ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
1654         if (ssid == NULL)
1655                 return 1;
1656
1657         for (i = 0; i < drv->num_filter_ssids; i++) {
1658                 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
1659                     os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
1660                     0)
1661                         return 0;
1662         }
1663
1664         return 1;
1665 }
1666
1667
1668 struct nl80211_bss_info_arg {
1669         struct wpa_driver_nl80211_data *drv;
1670         struct wpa_scan_results *res;
1671 };
1672
1673 static int bss_info_handler(struct nl_msg *msg, void *arg)
1674 {
1675         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1676         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1677         struct nlattr *bss[NL80211_BSS_MAX + 1];
1678         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1679                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1680                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1681                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1682                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1683                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1684                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1685                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1686                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1687                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1688                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1689                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
1690         };
1691         struct nl80211_bss_info_arg *_arg = arg;
1692         struct wpa_scan_results *res = _arg->res;
1693         struct wpa_scan_res **tmp;
1694         struct wpa_scan_res *r;
1695         const u8 *ie, *beacon_ie;
1696         size_t ie_len, beacon_ie_len;
1697         u8 *pos;
1698
1699         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1700                   genlmsg_attrlen(gnlh, 0), NULL);
1701         if (!tb[NL80211_ATTR_BSS])
1702                 return NL_SKIP;
1703         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1704                              bss_policy))
1705                 return NL_SKIP;
1706         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1707                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1708                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1709         } else {
1710                 ie = NULL;
1711                 ie_len = 0;
1712         }
1713         if (bss[NL80211_BSS_BEACON_IES]) {
1714                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
1715                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
1716         } else {
1717                 beacon_ie = NULL;
1718                 beacon_ie_len = 0;
1719         }
1720
1721         if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
1722                                   ie ? ie_len : beacon_ie_len))
1723                 return NL_SKIP;
1724
1725         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
1726         if (r == NULL)
1727                 return NL_SKIP;
1728         if (bss[NL80211_BSS_BSSID])
1729                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1730                           ETH_ALEN);
1731         if (bss[NL80211_BSS_FREQUENCY])
1732                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1733         if (bss[NL80211_BSS_BEACON_INTERVAL])
1734                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1735         if (bss[NL80211_BSS_CAPABILITY])
1736                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1737         r->flags |= WPA_SCAN_NOISE_INVALID;
1738         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1739                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1740                 r->level /= 100; /* mBm to dBm */
1741                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1742         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1743                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1744                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1745         } else
1746                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1747         if (bss[NL80211_BSS_TSF])
1748                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1749         if (bss[NL80211_BSS_SEEN_MS_AGO])
1750                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1751         r->ie_len = ie_len;
1752         pos = (u8 *) (r + 1);
1753         if (ie) {
1754                 os_memcpy(pos, ie, ie_len);
1755                 pos += ie_len;
1756         }
1757         r->beacon_ie_len = beacon_ie_len;
1758         if (beacon_ie)
1759                 os_memcpy(pos, beacon_ie, beacon_ie_len);
1760
1761         if (bss[NL80211_BSS_STATUS]) {
1762                 enum nl80211_bss_status status;
1763                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1764                 switch (status) {
1765                 case NL80211_BSS_STATUS_AUTHENTICATED:
1766                         r->flags |= WPA_SCAN_AUTHENTICATED;
1767                         break;
1768                 case NL80211_BSS_STATUS_ASSOCIATED:
1769                         r->flags |= WPA_SCAN_ASSOCIATED;
1770                         break;
1771                 default:
1772                         break;
1773                 }
1774         }
1775
1776         tmp = os_realloc(res->res,
1777                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1778         if (tmp == NULL) {
1779                 os_free(r);
1780                 return NL_SKIP;
1781         }
1782         tmp[res->num++] = r;
1783         res->res = tmp;
1784
1785         return NL_SKIP;
1786 }
1787
1788
1789 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1790                                  const u8 *addr)
1791 {
1792         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1793                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1794                            "mismatch (" MACSTR ")", MAC2STR(addr));
1795                 wpa_driver_nl80211_mlme(drv, addr,
1796                                         NL80211_CMD_DEAUTHENTICATE,
1797                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1798         }
1799 }
1800
1801
1802 static void wpa_driver_nl80211_check_bss_status(
1803         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1804 {
1805         size_t i;
1806
1807         for (i = 0; i < res->num; i++) {
1808                 struct wpa_scan_res *r = res->res[i];
1809                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1810                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1811                                    "indicates BSS status with " MACSTR
1812                                    " as authenticated",
1813                                    MAC2STR(r->bssid));
1814                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1815                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1816                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1817                             0) {
1818                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1819                                            " in local state (auth=" MACSTR
1820                                            " assoc=" MACSTR ")",
1821                                            MAC2STR(drv->auth_bssid),
1822                                            MAC2STR(drv->bssid));
1823                                 clear_state_mismatch(drv, r->bssid);
1824                         }
1825                 }
1826
1827                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1828                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1829                                    "indicate BSS status with " MACSTR
1830                                    " as associated",
1831                                    MAC2STR(r->bssid));
1832                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1833                             !drv->associated) {
1834                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1835                                            "(not associated) does not match "
1836                                            "with BSS state");
1837                                 clear_state_mismatch(drv, r->bssid);
1838                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1839                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1840                                    0) {
1841                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1842                                            "(associated with " MACSTR ") does "
1843                                            "not match with BSS state",
1844                                            MAC2STR(drv->bssid));
1845                                 clear_state_mismatch(drv, r->bssid);
1846                                 clear_state_mismatch(drv, drv->bssid);
1847                         }
1848                 }
1849         }
1850 }
1851
1852
1853 static void wpa_scan_results_free(struct wpa_scan_results *res)
1854 {
1855         size_t i;
1856
1857         if (res == NULL)
1858                 return;
1859
1860         for (i = 0; i < res->num; i++)
1861                 os_free(res->res[i]);
1862         os_free(res->res);
1863         os_free(res);
1864 }
1865
1866
1867 static struct wpa_scan_results *
1868 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
1869 {
1870         struct nl_msg *msg;
1871         struct wpa_scan_results *res;
1872         int ret;
1873         struct nl80211_bss_info_arg arg;
1874
1875         res = os_zalloc(sizeof(*res));
1876         if (res == NULL)
1877                 return NULL;
1878         msg = nlmsg_alloc();
1879         if (!msg)
1880                 goto nla_put_failure;
1881
1882         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1883                     NL80211_CMD_GET_SCAN, 0);
1884         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1885
1886         arg.drv = drv;
1887         arg.res = res;
1888         ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
1889         msg = NULL;
1890         if (ret == 0) {
1891                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1892                            (unsigned long) res->num);
1893                 return res;
1894         }
1895         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1896                    "(%s)", ret, strerror(-ret));
1897 nla_put_failure:
1898         nlmsg_free(msg);
1899         wpa_scan_results_free(res);
1900         return NULL;
1901 }
1902
1903
1904 /**
1905  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1906  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1907  * Returns: Scan results on success, -1 on failure
1908  */
1909 static struct wpa_scan_results *
1910 wpa_driver_nl80211_get_scan_results(void *priv)
1911 {
1912         struct i802_bss *bss = priv;
1913         struct wpa_driver_nl80211_data *drv = bss->drv;
1914         struct wpa_scan_results *res;
1915
1916         res = nl80211_get_scan_results(drv);
1917         if (res)
1918                 wpa_driver_nl80211_check_bss_status(drv, res);
1919         return res;
1920 }
1921
1922
1923 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
1924 {
1925         struct wpa_scan_results *res;
1926         size_t i;
1927
1928         res = nl80211_get_scan_results(drv);
1929         if (res == NULL) {
1930                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
1931                 return;
1932         }
1933
1934         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
1935         for (i = 0; i < res->num; i++) {
1936                 struct wpa_scan_res *r = res->res[i];
1937                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
1938                            (int) i, (int) res->num, MAC2STR(r->bssid),
1939                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
1940                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
1941         }
1942
1943         wpa_scan_results_free(res);
1944 }
1945
1946
1947 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1948                                       enum wpa_alg alg, const u8 *addr,
1949                                       int key_idx, int set_tx,
1950                                       const u8 *seq, size_t seq_len,
1951                                       const u8 *key, size_t key_len)
1952 {
1953         struct i802_bss *bss = priv;
1954         struct wpa_driver_nl80211_data *drv = bss->drv;
1955         int ifindex = if_nametoindex(ifname);
1956         struct nl_msg *msg;
1957         int ret;
1958
1959         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1960                    "set_tx=%d seq_len=%lu key_len=%lu",
1961                    __func__, ifindex, alg, addr, key_idx, set_tx,
1962                    (unsigned long) seq_len, (unsigned long) key_len);
1963
1964         msg = nlmsg_alloc();
1965         if (!msg)
1966                 return -ENOMEM;
1967
1968         if (alg == WPA_ALG_NONE) {
1969                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1970                             0, NL80211_CMD_DEL_KEY, 0);
1971         } else {
1972                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1973                             0, NL80211_CMD_NEW_KEY, 0);
1974                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1975                 switch (alg) {
1976                 case WPA_ALG_WEP:
1977                         if (key_len == 5)
1978                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1979                                             WLAN_CIPHER_SUITE_WEP40);
1980                         else
1981                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1982                                             WLAN_CIPHER_SUITE_WEP104);
1983                         break;
1984                 case WPA_ALG_TKIP:
1985                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1986                                     WLAN_CIPHER_SUITE_TKIP);
1987                         break;
1988                 case WPA_ALG_CCMP:
1989                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1990                                     WLAN_CIPHER_SUITE_CCMP);
1991                         break;
1992                 case WPA_ALG_IGTK:
1993                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1994                                     WLAN_CIPHER_SUITE_AES_CMAC);
1995                         break;
1996                 default:
1997                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1998                                    "algorithm %d", __func__, alg);
1999                         nlmsg_free(msg);
2000                         return -1;
2001                 }
2002         }
2003
2004         if (seq && seq_len)
2005                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
2006
2007         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2008         {
2009                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
2010                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2011         }
2012         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2013         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2014
2015         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2016         if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
2017                 ret = 0;
2018         if (ret)
2019                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2020                            ret, strerror(-ret));
2021
2022         /*
2023          * If we failed or don't need to set the default TX key (below),
2024          * we're done here.
2025          */
2026         if (ret || !set_tx || alg == WPA_ALG_NONE)
2027                 return ret;
2028 #ifdef HOSTAPD /* FIX: is this needed? */
2029         if (addr)
2030                 return ret;
2031 #endif /* HOSTAPD */
2032
2033         msg = nlmsg_alloc();
2034         if (!msg)
2035                 return -ENOMEM;
2036
2037         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2038                     0, NL80211_CMD_SET_KEY, 0);
2039         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2040         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2041         if (alg == WPA_ALG_IGTK)
2042                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2043         else
2044                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2045
2046         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2047         if (ret == -ENOENT)
2048                 ret = 0;
2049         if (ret)
2050                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2051                            "err=%d %s)", ret, strerror(-ret));
2052         return ret;
2053
2054 nla_put_failure:
2055         return -ENOBUFS;
2056 }
2057
2058
2059 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2060                       int key_idx, int defkey,
2061                       const u8 *seq, size_t seq_len,
2062                       const u8 *key, size_t key_len)
2063 {
2064         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2065         if (!key_attr)
2066                 return -1;
2067
2068         if (defkey && alg == WPA_ALG_IGTK)
2069                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2070         else if (defkey)
2071                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2072
2073         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2074
2075         switch (alg) {
2076         case WPA_ALG_WEP:
2077                 if (key_len == 5)
2078                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2079                                     WLAN_CIPHER_SUITE_WEP40);
2080                 else
2081                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2082                                     WLAN_CIPHER_SUITE_WEP104);
2083                 break;
2084         case WPA_ALG_TKIP:
2085                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2086                 break;
2087         case WPA_ALG_CCMP:
2088                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2089                 break;
2090         case WPA_ALG_IGTK:
2091                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2092                             WLAN_CIPHER_SUITE_AES_CMAC);
2093                 break;
2094         default:
2095                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2096                            "algorithm %d", __func__, alg);
2097                 return -1;
2098         }
2099
2100         if (seq && seq_len)
2101                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2102
2103         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2104
2105         nla_nest_end(msg, key_attr);
2106
2107         return 0;
2108  nla_put_failure:
2109         return -1;
2110 }
2111
2112
2113 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2114                                  struct nl_msg *msg)
2115 {
2116         int i, privacy = 0;
2117         struct nlattr *nl_keys, *nl_key;
2118
2119         for (i = 0; i < 4; i++) {
2120                 if (!params->wep_key[i])
2121                         continue;
2122                 privacy = 1;
2123                 break;
2124         }
2125         if (!privacy)
2126                 return 0;
2127
2128         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2129
2130         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2131         if (!nl_keys)
2132                 goto nla_put_failure;
2133
2134         for (i = 0; i < 4; i++) {
2135                 if (!params->wep_key[i])
2136                         continue;
2137
2138                 nl_key = nla_nest_start(msg, i);
2139                 if (!nl_key)
2140                         goto nla_put_failure;
2141
2142                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2143                         params->wep_key[i]);
2144                 if (params->wep_key_len[i] == 5)
2145                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2146                                     WLAN_CIPHER_SUITE_WEP40);
2147                 else
2148                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2149                                     WLAN_CIPHER_SUITE_WEP104);
2150
2151                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2152
2153                 if (i == params->wep_tx_keyidx)
2154                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2155
2156                 nla_nest_end(msg, nl_key);
2157         }
2158         nla_nest_end(msg, nl_keys);
2159
2160         return 0;
2161
2162 nla_put_failure:
2163         return -ENOBUFS;
2164 }
2165
2166
2167 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2168                                    const u8 *addr, int cmd, u16 reason_code)
2169 {
2170         int ret = -1;
2171         struct nl_msg *msg;
2172
2173         msg = nlmsg_alloc();
2174         if (!msg)
2175                 return -1;
2176
2177         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2178
2179         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2180         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2181         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2182
2183         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2184         msg = NULL;
2185         if (ret) {
2186                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2187                            "(%s)", ret, strerror(-ret));
2188                 goto nla_put_failure;
2189         }
2190         ret = 0;
2191
2192 nla_put_failure:
2193         nlmsg_free(msg);
2194         return ret;
2195 }
2196
2197
2198 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2199                                          const u8 *addr, int reason_code)
2200 {
2201         wpa_printf(MSG_DEBUG, "%s", __func__);
2202         drv->associated = 0;
2203         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2204                                        reason_code);
2205 }
2206
2207
2208 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2209                                              int reason_code)
2210 {
2211         struct i802_bss *bss = priv;
2212         struct wpa_driver_nl80211_data *drv = bss->drv;
2213         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2214                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2215         wpa_printf(MSG_DEBUG, "%s", __func__);
2216         drv->associated = 0;
2217         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2218                                        reason_code);
2219 }
2220
2221
2222 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2223                                            int reason_code)
2224 {
2225         struct i802_bss *bss = priv;
2226         struct wpa_driver_nl80211_data *drv = bss->drv;
2227         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2228                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2229         wpa_printf(MSG_DEBUG, "%s", __func__);
2230         drv->associated = 0;
2231         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2232                                        reason_code);
2233 }
2234
2235
2236 static int wpa_driver_nl80211_authenticate(
2237         void *priv, struct wpa_driver_auth_params *params)
2238 {
2239         struct i802_bss *bss = priv;
2240         struct wpa_driver_nl80211_data *drv = bss->drv;
2241         int ret = -1, i;
2242         struct nl_msg *msg;
2243         enum nl80211_auth_type type;
2244         int count = 0;
2245
2246         drv->associated = 0;
2247         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2248         /* FIX: IBSS mode */
2249         if (drv->nlmode != NL80211_IFTYPE_STATION)
2250                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2251
2252         if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2253                 return -1;
2254
2255 retry:
2256         msg = nlmsg_alloc();
2257         if (!msg)
2258                 return -1;
2259
2260         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2261                    drv->ifindex);
2262
2263         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2264                     NL80211_CMD_AUTHENTICATE, 0);
2265
2266         for (i = 0; i < 4; i++) {
2267                 if (!params->wep_key[i])
2268                         continue;
2269                 wpa_driver_nl80211_set_key(bss->ifname, drv, WPA_ALG_WEP, NULL,
2270                                            i,
2271                                            i == params->wep_tx_keyidx, NULL, 0,
2272                                            params->wep_key[i],
2273                                            params->wep_key_len[i]);
2274                 if (params->wep_tx_keyidx != i)
2275                         continue;
2276                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2277                                params->wep_key[i], params->wep_key_len[i])) {
2278                         nlmsg_free(msg);
2279                         return -1;
2280                 }
2281         }
2282
2283         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2284         if (params->bssid) {
2285                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2286                            MAC2STR(params->bssid));
2287                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2288         }
2289         if (params->freq) {
2290                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2291                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2292         }
2293         if (params->ssid) {
2294                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2295                                   params->ssid, params->ssid_len);
2296                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2297                         params->ssid);
2298         }
2299         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2300         if (params->ie)
2301                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2302         /*
2303          * TODO: if multiple auth_alg options enabled, try them one by one if
2304          * the AP rejects authentication due to unknown auth alg
2305          */
2306         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2307                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2308         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2309                 type = NL80211_AUTHTYPE_SHARED_KEY;
2310         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2311                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2312         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2313                 type = NL80211_AUTHTYPE_FT;
2314         else
2315                 goto nla_put_failure;
2316         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2317         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2318
2319         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2320         msg = NULL;
2321         if (ret) {
2322                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2323                            "(%s)", ret, strerror(-ret));
2324                 count++;
2325                 if (ret == -EALREADY && count == 1 && params->bssid) {
2326                         /*
2327                          * mac80211 does not currently accept new
2328                          * authentication if we are already authenticated. As a
2329                          * workaround, force deauthentication and try again.
2330                          */
2331                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2332                                    "after forced deauthentication");
2333                         wpa_driver_nl80211_deauthenticate(
2334                                 bss, params->bssid,
2335                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2336                         nlmsg_free(msg);
2337                         goto retry;
2338                 }
2339                 goto nla_put_failure;
2340         }
2341         ret = 0;
2342         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2343                    "successfully");
2344
2345 nla_put_failure:
2346         nlmsg_free(msg);
2347         return ret;
2348 }
2349
2350
2351 struct phy_info_arg {
2352         u16 *num_modes;
2353         struct hostapd_hw_modes *modes;
2354 };
2355
2356 static int phy_info_handler(struct nl_msg *msg, void *arg)
2357 {
2358         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2359         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2360         struct phy_info_arg *phy_info = arg;
2361
2362         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2363
2364         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2365         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2366                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2367                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2368                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2369                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2370                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2371                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2372         };
2373
2374         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2375         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2376                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2377                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2378         };
2379
2380         struct nlattr *nl_band;
2381         struct nlattr *nl_freq;
2382         struct nlattr *nl_rate;
2383         int rem_band, rem_freq, rem_rate;
2384         struct hostapd_hw_modes *mode;
2385         int idx, mode_is_set;
2386
2387         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2388                   genlmsg_attrlen(gnlh, 0), NULL);
2389
2390         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2391                 return NL_SKIP;
2392
2393         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2394                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2395                 if (!mode)
2396                         return NL_SKIP;
2397                 phy_info->modes = mode;
2398
2399                 mode_is_set = 0;
2400
2401                 mode = &phy_info->modes[*(phy_info->num_modes)];
2402                 memset(mode, 0, sizeof(*mode));
2403                 *(phy_info->num_modes) += 1;
2404
2405                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2406                           nla_len(nl_band), NULL);
2407
2408                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2409                         mode->ht_capab = nla_get_u16(
2410                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2411                 }
2412
2413                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2414                         mode->a_mpdu_params |= nla_get_u8(
2415                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2416                                 0x03;
2417                 }
2418
2419                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2420                         mode->a_mpdu_params |= nla_get_u8(
2421                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2422                                 2;
2423                 }
2424
2425                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2426                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2427                         u8 *mcs;
2428                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2429                         os_memcpy(mode->mcs_set, mcs, 16);
2430                 }
2431
2432                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2433                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2434                                   nla_len(nl_freq), freq_policy);
2435                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2436                                 continue;
2437                         mode->num_channels++;
2438                 }
2439
2440                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2441                 if (!mode->channels)
2442                         return NL_SKIP;
2443
2444                 idx = 0;
2445
2446                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2447                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2448                                   nla_len(nl_freq), freq_policy);
2449                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2450                                 continue;
2451
2452                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2453                         mode->channels[idx].flag = 0;
2454
2455                         if (!mode_is_set) {
2456                                 /* crude heuristic */
2457                                 if (mode->channels[idx].freq < 4000)
2458                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2459                                 else
2460                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2461                                 mode_is_set = 1;
2462                         }
2463
2464                         /* crude heuristic */
2465                         if (mode->channels[idx].freq < 4000)
2466                                 if (mode->channels[idx].freq == 2484)
2467                                         mode->channels[idx].chan = 14;
2468                                 else
2469                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2470                         else
2471                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2472
2473                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2474                                 mode->channels[idx].flag |=
2475                                         HOSTAPD_CHAN_DISABLED;
2476                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2477                                 mode->channels[idx].flag |=
2478                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2479                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2480                                 mode->channels[idx].flag |=
2481                                         HOSTAPD_CHAN_NO_IBSS;
2482                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2483                                 mode->channels[idx].flag |=
2484                                         HOSTAPD_CHAN_RADAR;
2485
2486                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2487                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2488                                 mode->channels[idx].max_tx_power =
2489                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2490
2491                         idx++;
2492                 }
2493
2494                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2495                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2496                                   nla_len(nl_rate), rate_policy);
2497                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2498                                 continue;
2499                         mode->num_rates++;
2500                 }
2501
2502                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2503                 if (!mode->rates)
2504                         return NL_SKIP;
2505
2506                 idx = 0;
2507
2508                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2509                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2510                                   nla_len(nl_rate), rate_policy);
2511                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2512                                 continue;
2513                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2514
2515                         /* crude heuristic */
2516                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2517                             mode->rates[idx] > 200)
2518                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2519
2520                         idx++;
2521                 }
2522         }
2523
2524         return NL_SKIP;
2525 }
2526
2527 static struct hostapd_hw_modes *
2528 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2529 {
2530         u16 m;
2531         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2532         int i, mode11g_idx = -1;
2533
2534         /* If only 802.11g mode is included, use it to construct matching
2535          * 802.11b mode data. */
2536
2537         for (m = 0; m < *num_modes; m++) {
2538                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2539                         return modes; /* 802.11b already included */
2540                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2541                         mode11g_idx = m;
2542         }
2543
2544         if (mode11g_idx < 0)
2545                 return modes; /* 2.4 GHz band not supported at all */
2546
2547         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2548         if (nmodes == NULL)
2549                 return modes; /* Could not add 802.11b mode */
2550
2551         mode = &nmodes[*num_modes];
2552         os_memset(mode, 0, sizeof(*mode));
2553         (*num_modes)++;
2554         modes = nmodes;
2555
2556         mode->mode = HOSTAPD_MODE_IEEE80211B;
2557
2558         mode11g = &modes[mode11g_idx];
2559         mode->num_channels = mode11g->num_channels;
2560         mode->channels = os_malloc(mode11g->num_channels *
2561                                    sizeof(struct hostapd_channel_data));
2562         if (mode->channels == NULL) {
2563                 (*num_modes)--;
2564                 return modes; /* Could not add 802.11b mode */
2565         }
2566         os_memcpy(mode->channels, mode11g->channels,
2567                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2568
2569         mode->num_rates = 0;
2570         mode->rates = os_malloc(4 * sizeof(int));
2571         if (mode->rates == NULL) {
2572                 os_free(mode->channels);
2573                 (*num_modes)--;
2574                 return modes; /* Could not add 802.11b mode */
2575         }
2576
2577         for (i = 0; i < mode11g->num_rates; i++) {
2578                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2579                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2580                         continue;
2581                 mode->rates[mode->num_rates] = mode11g->rates[i];
2582                 mode->num_rates++;
2583                 if (mode->num_rates == 4)
2584                         break;
2585         }
2586
2587         if (mode->num_rates == 0) {
2588                 os_free(mode->channels);
2589                 os_free(mode->rates);
2590                 (*num_modes)--;
2591                 return modes; /* No 802.11b rates */
2592         }
2593
2594         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2595                    "information");
2596
2597         return modes;
2598 }
2599
2600
2601 static struct hostapd_hw_modes *
2602 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2603 {
2604         struct i802_bss *bss = priv;
2605         struct wpa_driver_nl80211_data *drv = bss->drv;
2606         struct nl_msg *msg;
2607         struct phy_info_arg result = {
2608                 .num_modes = num_modes,
2609                 .modes = NULL,
2610         };
2611
2612         *num_modes = 0;
2613         *flags = 0;
2614
2615         msg = nlmsg_alloc();
2616         if (!msg)
2617                 return NULL;
2618
2619         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2620                     0, NL80211_CMD_GET_WIPHY, 0);
2621
2622         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2623
2624         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2625                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2626  nla_put_failure:
2627         return NULL;
2628 }
2629
2630
2631 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2632                                          const void *data, size_t len,
2633                                          int encrypt)
2634 {
2635         __u8 rtap_hdr[] = {
2636                 0x00, 0x00, /* radiotap version */
2637                 0x0e, 0x00, /* radiotap length */
2638                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2639                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2640                 0x00,       /* padding */
2641                 0x00, 0x00, /* RX and TX flags to indicate that */
2642                 0x00, 0x00, /* this is the injected frame directly */
2643         };
2644         struct iovec iov[2] = {
2645                 {
2646                         .iov_base = &rtap_hdr,
2647                         .iov_len = sizeof(rtap_hdr),
2648                 },
2649                 {
2650                         .iov_base = (void *) data,
2651                         .iov_len = len,
2652                 }
2653         };
2654         struct msghdr msg = {
2655                 .msg_name = NULL,
2656                 .msg_namelen = 0,
2657                 .msg_iov = iov,
2658                 .msg_iovlen = 2,
2659                 .msg_control = NULL,
2660                 .msg_controllen = 0,
2661                 .msg_flags = 0,
2662         };
2663
2664         if (encrypt)
2665                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2666
2667         return sendmsg(drv->monitor_sock, &msg, 0);
2668 }
2669
2670
2671 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2672                                         size_t data_len)
2673 {
2674         struct i802_bss *bss = priv;
2675         struct wpa_driver_nl80211_data *drv = bss->drv;
2676         struct ieee80211_mgmt *mgmt;
2677         int encrypt = 1;
2678         u16 fc;
2679
2680         mgmt = (struct ieee80211_mgmt *) data;
2681         fc = le_to_host16(mgmt->frame_control);
2682
2683         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2684             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2685                 /*
2686                  * Only one of the authentication frame types is encrypted.
2687                  * In order for static WEP encryption to work properly (i.e.,
2688                  * to not encrypt the frame), we need to tell mac80211 about
2689                  * the frames that must not be encrypted.
2690                  */
2691                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2692                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2693                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2694                         encrypt = 0;
2695         }
2696
2697         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2698 }
2699
2700
2701 static int wpa_driver_nl80211_set_beacon(void *priv,
2702                                          const u8 *head, size_t head_len,
2703                                          const u8 *tail, size_t tail_len,
2704                                          int dtim_period, int beacon_int)
2705 {
2706         struct i802_bss *bss = priv;
2707         struct wpa_driver_nl80211_data *drv = bss->drv;
2708         struct nl_msg *msg;
2709         u8 cmd = NL80211_CMD_NEW_BEACON;
2710         int ret;
2711         int beacon_set;
2712         int ifindex = if_nametoindex(bss->ifname);
2713
2714         beacon_set = bss->beacon_set;
2715
2716         msg = nlmsg_alloc();
2717         if (!msg)
2718                 return -ENOMEM;
2719
2720         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2721                    beacon_set);
2722         if (beacon_set)
2723                 cmd = NL80211_CMD_SET_BEACON;
2724
2725         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2726                     0, cmd, 0);
2727         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2728         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2729         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2730         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2731         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2732
2733         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2734         if (ret) {
2735                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2736                            ret, strerror(-ret));
2737         } else {
2738                 bss->beacon_set = 1;
2739         }
2740         return ret;
2741  nla_put_failure:
2742         return -ENOBUFS;
2743 }
2744
2745
2746 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2747                                        int freq, int ht_enabled,
2748                                        int sec_channel_offset)
2749 {
2750         struct nl_msg *msg;
2751         int ret;
2752
2753         msg = nlmsg_alloc();
2754         if (!msg)
2755                 return -1;
2756
2757         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2758                     NL80211_CMD_SET_WIPHY, 0);
2759
2760         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2761         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2762         if (ht_enabled) {
2763                 switch (sec_channel_offset) {
2764                 case -1:
2765                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2766                                     NL80211_CHAN_HT40MINUS);
2767                         break;
2768                 case 1:
2769                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2770                                     NL80211_CHAN_HT40PLUS);
2771                         break;
2772                 default:
2773                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2774                                     NL80211_CHAN_HT20);
2775                         break;
2776                 }
2777         }
2778
2779         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2780         if (ret == 0)
2781                 return 0;
2782         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2783                    "%d (%s)", freq, ret, strerror(-ret));
2784 nla_put_failure:
2785         return -1;
2786 }
2787
2788
2789 static int wpa_driver_nl80211_sta_add(void *priv,
2790                                       struct hostapd_sta_add_params *params)
2791 {
2792         struct i802_bss *bss = priv;
2793         struct wpa_driver_nl80211_data *drv = bss->drv;
2794         struct nl_msg *msg;
2795         int ret = -ENOBUFS;
2796
2797         msg = nlmsg_alloc();
2798         if (!msg)
2799                 return -ENOMEM;
2800
2801         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2802                     0, NL80211_CMD_NEW_STATION, 0);
2803
2804         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
2805         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2806         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2807         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2808                 params->supp_rates);
2809         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2810                     params->listen_interval);
2811         if (params->ht_capabilities) {
2812                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2813                         sizeof(*params->ht_capabilities),
2814                         params->ht_capabilities);
2815         }
2816
2817         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2818         if (ret)
2819                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2820                            "result: %d (%s)", ret, strerror(-ret));
2821         if (ret == -EEXIST)
2822                 ret = 0;
2823  nla_put_failure:
2824         return ret;
2825 }
2826
2827
2828 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2829 {
2830         struct i802_bss *bss = priv;
2831         struct wpa_driver_nl80211_data *drv = bss->drv;
2832         struct nl_msg *msg;
2833         int ret;
2834
2835         msg = nlmsg_alloc();
2836         if (!msg)
2837                 return -ENOMEM;
2838
2839         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2840                     0, NL80211_CMD_DEL_STATION, 0);
2841
2842         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2843                     if_nametoindex(bss->ifname));
2844         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2845
2846         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2847         if (ret == -ENOENT)
2848                 return 0;
2849         return ret;
2850  nla_put_failure:
2851         return -ENOBUFS;
2852 }
2853
2854
2855 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2856                                  int ifidx)
2857 {
2858         struct nl_msg *msg;
2859
2860         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
2861
2862 #ifdef HOSTAPD
2863         /* stop listening for EAPOL on this interface */
2864         del_ifidx(drv, ifidx);
2865 #endif /* HOSTAPD */
2866
2867         msg = nlmsg_alloc();
2868         if (!msg)
2869                 goto nla_put_failure;
2870
2871         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2872                     0, NL80211_CMD_DEL_INTERFACE, 0);
2873         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2874
2875         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2876                 return;
2877  nla_put_failure:
2878         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
2879 }
2880
2881
2882 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2883                                      const char *ifname,
2884                                      enum nl80211_iftype iftype,
2885                                      const u8 *addr, int wds)
2886 {
2887         struct nl_msg *msg, *flags = NULL;
2888         int ifidx;
2889         int ret = -ENOBUFS;
2890
2891         msg = nlmsg_alloc();
2892         if (!msg)
2893                 return -1;
2894
2895         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2896                     0, NL80211_CMD_NEW_INTERFACE, 0);
2897         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2898         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2899         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2900
2901         if (iftype == NL80211_IFTYPE_MONITOR) {
2902                 int err;
2903
2904                 flags = nlmsg_alloc();
2905                 if (!flags)
2906                         goto nla_put_failure;
2907
2908                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2909
2910                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2911
2912                 nlmsg_free(flags);
2913
2914                 if (err)
2915                         goto nla_put_failure;
2916         } else if (wds) {
2917                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
2918         }
2919
2920         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2921         if (ret) {
2922  nla_put_failure:
2923                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2924                            ifname, ret, strerror(-ret));
2925                 return ret;
2926         }
2927
2928         ifidx = if_nametoindex(ifname);
2929         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
2930                    ifname, ifidx);
2931
2932         if (ifidx <= 0)
2933                 return -1;
2934
2935 #ifdef HOSTAPD
2936         /* start listening for EAPOL on this interface */
2937         add_ifidx(drv, ifidx);
2938 #endif /* HOSTAPD */
2939
2940         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
2941             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
2942                 nl80211_remove_iface(drv, ifidx);
2943                 return -1;
2944         }
2945
2946         return ifidx;
2947 }
2948
2949
2950 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2951                                 const char *ifname, enum nl80211_iftype iftype,
2952                                 const u8 *addr, int wds)
2953 {
2954         int ret;
2955
2956         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
2957
2958         /* if error occured and interface exists already */
2959         if (ret == -ENFILE && if_nametoindex(ifname)) {
2960                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2961
2962                 /* Try to remove the interface that was already there. */
2963                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2964
2965                 /* Try to create the interface again */
2966                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
2967                                                 wds);
2968         }
2969
2970         if (ret >= 0 && drv->disable_11b_rates)
2971                 nl80211_disable_11b_rates(drv, ret, 1);
2972
2973         return ret;
2974 }
2975
2976
2977 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2978 {
2979         struct ieee80211_hdr *hdr;
2980         u16 fc;
2981         union wpa_event_data event;
2982
2983         hdr = (struct ieee80211_hdr *) buf;
2984         fc = le_to_host16(hdr->frame_control);
2985
2986         os_memset(&event, 0, sizeof(event));
2987         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2988         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2989         event.tx_status.dst = hdr->addr1;
2990         event.tx_status.data = buf;
2991         event.tx_status.data_len = len;
2992         event.tx_status.ack = ok;
2993         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2994 }
2995
2996
2997 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2998                              u8 *buf, size_t len)
2999 {
3000         union wpa_event_data event;
3001         os_memset(&event, 0, sizeof(event));
3002         event.rx_from_unknown.frame = buf;
3003         event.rx_from_unknown.len = len;
3004         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
3005 }
3006
3007
3008 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3009                          u8 *buf, size_t len, int datarate, int ssi_signal)
3010 {
3011         struct ieee80211_hdr *hdr;
3012         u16 fc;
3013         union wpa_event_data event;
3014
3015         hdr = (struct ieee80211_hdr *) buf;
3016         fc = le_to_host16(hdr->frame_control);
3017
3018         switch (WLAN_FC_GET_TYPE(fc)) {
3019         case WLAN_FC_TYPE_MGMT:
3020                 os_memset(&event, 0, sizeof(event));
3021                 event.rx_mgmt.frame = buf;
3022                 event.rx_mgmt.frame_len = len;
3023                 event.rx_mgmt.datarate = datarate;
3024                 event.rx_mgmt.ssi_signal = ssi_signal;
3025                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3026                 break;
3027         case WLAN_FC_TYPE_CTRL:
3028                 /* can only get here with PS-Poll frames */
3029                 wpa_printf(MSG_DEBUG, "CTRL");
3030                 from_unknown_sta(drv, buf, len);
3031                 break;
3032         case WLAN_FC_TYPE_DATA:
3033                 from_unknown_sta(drv, buf, len);
3034                 break;
3035         }
3036 }
3037
3038
3039 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3040 {
3041         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3042         int len;
3043         unsigned char buf[3000];
3044         struct ieee80211_radiotap_iterator iter;
3045         int ret;
3046         int datarate = 0, ssi_signal = 0;
3047         int injected = 0, failed = 0, rxflags = 0;
3048
3049         len = recv(sock, buf, sizeof(buf), 0);
3050         if (len < 0) {
3051                 perror("recv");
3052                 return;
3053         }
3054
3055         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3056                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3057                            "frame since Probe Request reporting is disabled");
3058                 return;
3059         }
3060
3061         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3062                 printf("received invalid radiotap frame\n");
3063                 return;
3064         }
3065
3066         while (1) {
3067                 ret = ieee80211_radiotap_iterator_next(&iter);
3068                 if (ret == -ENOENT)
3069                         break;
3070                 if (ret) {
3071                         printf("received invalid radiotap frame (%d)\n", ret);
3072                         return;
3073                 }
3074                 switch (iter.this_arg_index) {
3075                 case IEEE80211_RADIOTAP_FLAGS:
3076                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3077                                 len -= 4;
3078                         break;
3079                 case IEEE80211_RADIOTAP_RX_FLAGS:
3080                         rxflags = 1;
3081                         break;
3082                 case IEEE80211_RADIOTAP_TX_FLAGS:
3083                         injected = 1;
3084                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3085                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3086                         break;
3087                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3088                         break;
3089                 case IEEE80211_RADIOTAP_CHANNEL:
3090                         /* TODO: convert from freq/flags to channel number */
3091                         break;
3092                 case IEEE80211_RADIOTAP_RATE:
3093                         datarate = *iter.this_arg * 5;
3094                         break;
3095                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3096                         ssi_signal = *iter.this_arg;
3097                         break;
3098                 }
3099         }
3100
3101         if (rxflags && injected)
3102                 return;
3103
3104         if (!injected)
3105                 handle_frame(drv, buf + iter.max_length,
3106                              len - iter.max_length, datarate, ssi_signal);
3107         else
3108                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3109                                    len - iter.max_length, !failed);
3110 }
3111
3112
3113 /*
3114  * we post-process the filter code later and rewrite
3115  * this to the offset to the last instruction
3116  */
3117 #define PASS    0xFF
3118 #define FAIL    0xFE
3119
3120 static struct sock_filter msock_filter_insns[] = {
3121         /*
3122          * do a little-endian load of the radiotap length field
3123          */
3124         /* load lower byte into A */
3125         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3126         /* put it into X (== index register) */
3127         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3128         /* load upper byte into A */
3129         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3130         /* left-shift it by 8 */
3131         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3132         /* or with X */
3133         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3134         /* put result into X */
3135         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3136
3137         /*
3138          * Allow management frames through, this also gives us those
3139          * management frames that we sent ourselves with status
3140          */
3141         /* load the lower byte of the IEEE 802.11 frame control field */
3142         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3143         /* mask off frame type and version */
3144         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3145         /* accept frame if it's both 0, fall through otherwise */
3146         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3147
3148         /*
3149          * TODO: add a bit to radiotap RX flags that indicates
3150          * that the sending station is not associated, then
3151          * add a filter here that filters on our DA and that flag
3152          * to allow us to deauth frames to that bad station.
3153          *
3154          * Not a regression -- we didn't do it before either.
3155          */
3156
3157 #if 0
3158         /*
3159          * drop non-data frames
3160          */
3161         /* load the lower byte of the frame control field */
3162         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3163         /* mask off QoS bit */
3164         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3165         /* drop non-data frames */
3166         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3167 #endif
3168         /* load the upper byte of the frame control field */
3169         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3170         /* mask off toDS/fromDS */
3171         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3172         /* accept WDS frames */
3173         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3174
3175         /*
3176          * add header length to index
3177          */
3178         /* load the lower byte of the frame control field */
3179         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3180         /* mask off QoS bit */
3181         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3182         /* right shift it by 6 to give 0 or 2 */
3183         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3184         /* add data frame header length */
3185         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3186         /* add index, was start of 802.11 header */
3187         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3188         /* move to index, now start of LL header */
3189         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3190
3191         /*
3192          * Accept empty data frames, we use those for
3193          * polling activity.
3194          */
3195         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3196         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3197
3198         /*
3199          * Accept EAPOL frames
3200          */
3201         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3202         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3203         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3204         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3205
3206         /* keep these last two statements or change the code below */
3207         /* return 0 == "DROP" */
3208         BPF_STMT(BPF_RET | BPF_K, 0),
3209         /* return ~0 == "keep all" */
3210         BPF_STMT(BPF_RET | BPF_K, ~0),
3211 };
3212
3213 static struct sock_fprog msock_filter = {
3214         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3215         .filter = msock_filter_insns,
3216 };
3217
3218
3219 static int add_monitor_filter(int s)
3220 {
3221         int idx;
3222
3223         /* rewrite all PASS/FAIL jump offsets */
3224         for (idx = 0; idx < msock_filter.len; idx++) {
3225                 struct sock_filter *insn = &msock_filter_insns[idx];
3226
3227                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3228                         if (insn->code == (BPF_JMP|BPF_JA)) {
3229                                 if (insn->k == PASS)
3230                                         insn->k = msock_filter.len - idx - 2;
3231                                 else if (insn->k == FAIL)
3232                                         insn->k = msock_filter.len - idx - 3;
3233                         }
3234
3235                         if (insn->jt == PASS)
3236                                 insn->jt = msock_filter.len - idx - 2;
3237                         else if (insn->jt == FAIL)
3238                                 insn->jt = msock_filter.len - idx - 3;
3239
3240                         if (insn->jf == PASS)
3241                                 insn->jf = msock_filter.len - idx - 2;
3242                         else if (insn->jf == FAIL)
3243                                 insn->jf = msock_filter.len - idx - 3;
3244                 }
3245         }
3246
3247         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3248                        &msock_filter, sizeof(msock_filter))) {
3249                 perror("SO_ATTACH_FILTER");
3250                 return -1;
3251         }
3252
3253         return 0;
3254 }
3255
3256
3257 static void nl80211_remove_monitor_interface(
3258         struct wpa_driver_nl80211_data *drv)
3259 {
3260         if (drv->monitor_ifidx >= 0) {
3261                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3262                 drv->monitor_ifidx = -1;
3263         }
3264         if (drv->monitor_sock >= 0) {
3265                 eloop_unregister_read_sock(drv->monitor_sock);
3266                 close(drv->monitor_sock);
3267                 drv->monitor_sock = -1;
3268         }
3269 }
3270
3271
3272 static int
3273 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3274 {
3275         char buf[IFNAMSIZ];
3276         struct sockaddr_ll ll;
3277         int optval;
3278         socklen_t optlen;
3279
3280         snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
3281         buf[IFNAMSIZ - 1] = '\0';
3282
3283         drv->monitor_ifidx =
3284                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3285                                      0);
3286
3287         if (drv->monitor_ifidx < 0)
3288                 return -1;
3289
3290         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3291                 goto error;
3292
3293         memset(&ll, 0, sizeof(ll));
3294         ll.sll_family = AF_PACKET;
3295         ll.sll_ifindex = drv->monitor_ifidx;
3296         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3297         if (drv->monitor_sock < 0) {
3298                 perror("socket[PF_PACKET,SOCK_RAW]");
3299                 goto error;
3300         }
3301
3302         if (add_monitor_filter(drv->monitor_sock)) {
3303                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3304                            "interface; do filtering in user space");
3305                 /* This works, but will cost in performance. */
3306         }
3307
3308         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3309                 perror("monitor socket bind");
3310                 goto error;
3311         }
3312
3313         optlen = sizeof(optval);
3314         optval = 20;
3315         if (setsockopt
3316             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3317                 perror("Failed to set socket priority");
3318                 goto error;
3319         }
3320
3321         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3322                                      drv, NULL)) {
3323                 printf("Could not register monitor read socket\n");
3324                 goto error;
3325         }
3326
3327         return 0;
3328  error:
3329         nl80211_remove_monitor_interface(drv);
3330         return -1;
3331 }
3332
3333
3334 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3335
3336 static int wpa_driver_nl80211_hapd_send_eapol(
3337         void *priv, const u8 *addr, const u8 *data,
3338         size_t data_len, int encrypt, const u8 *own_addr)
3339 {
3340         struct i802_bss *bss = priv;
3341         struct wpa_driver_nl80211_data *drv = bss->drv;
3342         struct ieee80211_hdr *hdr;
3343         size_t len;
3344         u8 *pos;
3345         int res;
3346 #if 0 /* FIX */
3347         int qos = sta->flags & WPA_STA_WMM;
3348 #else
3349         int qos = 0;
3350 #endif
3351
3352         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3353                 data_len;
3354         hdr = os_zalloc(len);
3355         if (hdr == NULL) {
3356                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3357                        (unsigned long) len);
3358                 return -1;
3359         }
3360
3361         hdr->frame_control =
3362                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3363         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3364         if (encrypt)
3365                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3366 #if 0 /* To be enabled if qos determination is added above */
3367         if (qos) {
3368                 hdr->frame_control |=
3369                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3370         }
3371 #endif
3372
3373         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3374         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3375         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3376         pos = (u8 *) (hdr + 1);
3377
3378 #if 0 /* To be enabled if qos determination is added above */
3379         if (qos) {
3380                 /* add an empty QoS header if needed */
3381                 pos[0] = 0;
3382                 pos[1] = 0;
3383                 pos += 2;
3384         }
3385 #endif
3386
3387         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3388         pos += sizeof(rfc1042_header);
3389         WPA_PUT_BE16(pos, ETH_P_PAE);
3390         pos += 2;
3391         memcpy(pos, data, data_len);
3392
3393         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3394         if (res < 0) {
3395                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3396                            "failed: %d (%s)",
3397                            (unsigned long) len, errno, strerror(errno));
3398         }
3399         os_free(hdr);
3400
3401         return res;
3402 }
3403
3404
3405 static u32 sta_flags_nl80211(int flags)
3406 {
3407         u32 f = 0;
3408
3409         if (flags & WPA_STA_AUTHORIZED)
3410                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3411         if (flags & WPA_STA_WMM)
3412                 f |= BIT(NL80211_STA_FLAG_WME);
3413         if (flags & WPA_STA_SHORT_PREAMBLE)
3414                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3415         if (flags & WPA_STA_MFP)
3416                 f |= BIT(NL80211_STA_FLAG_MFP);
3417
3418         return f;
3419 }
3420
3421
3422 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3423                                             int total_flags,
3424                                             int flags_or, int flags_and)
3425 {
3426         struct i802_bss *bss = priv;
3427         struct wpa_driver_nl80211_data *drv = bss->drv;
3428         struct nl_msg *msg, *flags = NULL;
3429         struct nl80211_sta_flag_update upd;
3430
3431         msg = nlmsg_alloc();
3432         if (!msg)
3433                 return -ENOMEM;
3434
3435         flags = nlmsg_alloc();
3436         if (!flags) {
3437                 nlmsg_free(msg);
3438                 return -ENOMEM;
3439         }
3440
3441         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3442                     0, NL80211_CMD_SET_STATION, 0);
3443
3444         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3445                     if_nametoindex(bss->ifname));
3446         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3447
3448         /*
3449          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3450          * can be removed eventually.
3451          */
3452         if (total_flags & WPA_STA_AUTHORIZED)
3453                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3454
3455         if (total_flags & WPA_STA_WMM)
3456                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3457
3458         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3459                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3460
3461         if (total_flags & WPA_STA_MFP)
3462                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3463
3464         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3465                 goto nla_put_failure;
3466
3467         os_memset(&upd, 0, sizeof(upd));
3468         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3469         upd.set = sta_flags_nl80211(flags_or);
3470         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3471
3472         nlmsg_free(flags);
3473
3474         return send_and_recv_msgs(drv, msg, NULL, NULL);
3475  nla_put_failure:
3476         nlmsg_free(flags);
3477         return -ENOBUFS;
3478 }
3479
3480
3481 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3482                                  struct wpa_driver_associate_params *params)
3483 {
3484         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
3485             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3486                 nl80211_remove_monitor_interface(drv);
3487                 return -1;
3488         }
3489
3490         /* TODO: setup monitor interface (and add code somewhere to remove this
3491          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3492
3493         return 0;
3494 }
3495
3496
3497 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3498 {
3499         struct nl_msg *msg;
3500         int ret = -1;
3501
3502         msg = nlmsg_alloc();
3503         if (!msg)
3504                 return -1;
3505
3506         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3507                     NL80211_CMD_LEAVE_IBSS, 0);
3508         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3509         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3510         msg = NULL;
3511         if (ret) {
3512                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3513                            "(%s)", ret, strerror(-ret));
3514                 goto nla_put_failure;
3515         }
3516
3517         ret = 0;
3518         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3519
3520 nla_put_failure:
3521         nlmsg_free(msg);
3522         return ret;
3523 }
3524
3525
3526 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3527                                    struct wpa_driver_associate_params *params)
3528 {
3529         struct nl_msg *msg;
3530         int ret = -1;
3531         int count = 0;
3532
3533         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3534
3535         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
3536                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3537                            "IBSS mode");
3538                 return -1;
3539         }
3540
3541 retry:
3542         msg = nlmsg_alloc();
3543         if (!msg)
3544                 return -1;
3545
3546         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3547                     NL80211_CMD_JOIN_IBSS, 0);
3548         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3549
3550         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3551                 goto nla_put_failure;
3552
3553         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3554                           params->ssid, params->ssid_len);
3555         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3556                 params->ssid);
3557         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3558         drv->ssid_len = params->ssid_len;
3559
3560         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3561         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3562
3563         ret = nl80211_set_conn_keys(params, msg);
3564         if (ret)
3565                 goto nla_put_failure;
3566
3567         if (params->wpa_ie) {
3568                 wpa_hexdump(MSG_DEBUG,
3569                             "  * Extra IEs for Beacon/Probe Response frames",
3570                             params->wpa_ie, params->wpa_ie_len);
3571                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3572                         params->wpa_ie);
3573         }
3574
3575         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3576         msg = NULL;
3577         if (ret) {
3578                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3579                            ret, strerror(-ret));
3580                 count++;
3581                 if (ret == -EALREADY && count == 1) {
3582                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3583                                    "forced leave");
3584                         nl80211_leave_ibss(drv);
3585                         nlmsg_free(msg);
3586                         goto retry;
3587                 }
3588
3589                 goto nla_put_failure;
3590         }
3591         ret = 0;
3592         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3593
3594 nla_put_failure:
3595         nlmsg_free(msg);
3596         return ret;
3597 }
3598
3599
3600 static int wpa_driver_nl80211_connect(
3601         struct wpa_driver_nl80211_data *drv,
3602         struct wpa_driver_associate_params *params)
3603 {
3604         struct nl_msg *msg;
3605         enum nl80211_auth_type type;
3606         int ret = 0;
3607
3608         msg = nlmsg_alloc();
3609         if (!msg)
3610                 return -1;
3611
3612         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3613         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3614                     NL80211_CMD_CONNECT, 0);
3615
3616         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3617         if (params->bssid) {
3618                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3619                            MAC2STR(params->bssid));
3620                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3621         }
3622         if (params->freq) {
3623                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3624                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3625         }
3626         if (params->ssid) {
3627                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3628                                   params->ssid, params->ssid_len);
3629                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3630                         params->ssid);
3631                 if (params->ssid_len > sizeof(drv->ssid))
3632                         goto nla_put_failure;
3633                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3634                 drv->ssid_len = params->ssid_len;
3635         }
3636         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3637         if (params->wpa_ie)
3638                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3639                         params->wpa_ie);
3640
3641         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3642                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3643         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3644                 type = NL80211_AUTHTYPE_SHARED_KEY;
3645         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3646                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3647         else if (params->auth_alg & WPA_AUTH_ALG_FT)
3648                 type = NL80211_AUTHTYPE_FT;
3649         else
3650                 goto nla_put_failure;
3651
3652         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3653         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3654
3655         if (params->wpa_ie && params->wpa_ie_len) {
3656                 enum nl80211_wpa_versions ver;
3657
3658                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3659                         ver = NL80211_WPA_VERSION_2;
3660                 else
3661                         ver = NL80211_WPA_VERSION_1;
3662
3663                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3664                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3665         }
3666
3667         if (params->pairwise_suite != CIPHER_NONE) {
3668                 int cipher;
3669
3670                 switch (params->pairwise_suite) {
3671                 case CIPHER_WEP40:
3672                         cipher = WLAN_CIPHER_SUITE_WEP40;
3673                         break;
3674                 case CIPHER_WEP104:
3675                         cipher = WLAN_CIPHER_SUITE_WEP104;
3676                         break;
3677                 case CIPHER_CCMP:
3678                         cipher = WLAN_CIPHER_SUITE_CCMP;
3679                         break;
3680                 case CIPHER_TKIP:
3681                 default:
3682                         cipher = WLAN_CIPHER_SUITE_TKIP;
3683                         break;
3684                 }
3685                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3686         }
3687
3688         if (params->group_suite != CIPHER_NONE) {
3689                 int cipher;
3690
3691                 switch (params->group_suite) {
3692                 case CIPHER_WEP40:
3693                         cipher = WLAN_CIPHER_SUITE_WEP40;
3694                         break;
3695                 case CIPHER_WEP104:
3696                         cipher = WLAN_CIPHER_SUITE_WEP104;
3697                         break;
3698                 case CIPHER_CCMP:
3699                         cipher = WLAN_CIPHER_SUITE_CCMP;
3700                         break;
3701                 case CIPHER_TKIP:
3702                 default:
3703                         cipher = WLAN_CIPHER_SUITE_TKIP;
3704                         break;
3705                 }
3706                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3707         }
3708
3709         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3710             params->key_mgmt_suite == KEY_MGMT_PSK) {
3711                 int mgmt = WLAN_AKM_SUITE_PSK;
3712
3713                 switch (params->key_mgmt_suite) {
3714                 case KEY_MGMT_802_1X:
3715                         mgmt = WLAN_AKM_SUITE_8021X;
3716                         break;
3717                 case KEY_MGMT_PSK:
3718                 default:
3719                         mgmt = WLAN_AKM_SUITE_PSK;
3720                         break;
3721                 }
3722                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3723         }
3724
3725         ret = nl80211_set_conn_keys(params, msg);
3726         if (ret)
3727                 goto nla_put_failure;
3728
3729         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3730         msg = NULL;
3731         if (ret) {
3732                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3733                            "(%s)", ret, strerror(-ret));
3734                 goto nla_put_failure;
3735         }
3736         ret = 0;
3737         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3738
3739 nla_put_failure:
3740         nlmsg_free(msg);
3741         return ret;
3742
3743 }
3744
3745
3746 static int wpa_driver_nl80211_associate(
3747         void *priv, struct wpa_driver_associate_params *params)
3748 {
3749         struct i802_bss *bss = priv;
3750         struct wpa_driver_nl80211_data *drv = bss->drv;
3751         int ret = -1;
3752         struct nl_msg *msg;
3753
3754         if (params->mode == IEEE80211_MODE_AP)
3755                 return wpa_driver_nl80211_ap(drv, params);
3756
3757         if (params->mode == IEEE80211_MODE_IBSS)
3758                 return wpa_driver_nl80211_ibss(drv, params);
3759
3760         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3761                 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
3762                         return -1;
3763                 return wpa_driver_nl80211_connect(drv, params);
3764         }
3765
3766         drv->associated = 0;
3767
3768         msg = nlmsg_alloc();
3769         if (!msg)
3770                 return -1;
3771
3772         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3773                    drv->ifindex);
3774         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3775                     NL80211_CMD_ASSOCIATE, 0);
3776
3777         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3778         if (params->bssid) {
3779                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3780                            MAC2STR(params->bssid));
3781                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3782         }
3783         if (params->freq) {
3784                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3785                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3786                 drv->assoc_freq = params->freq;
3787         } else
3788                 drv->assoc_freq = 0;
3789         if (params->ssid) {
3790                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3791                                   params->ssid, params->ssid_len);
3792                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3793                         params->ssid);
3794                 if (params->ssid_len > sizeof(drv->ssid))
3795                         goto nla_put_failure;
3796                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3797                 drv->ssid_len = params->ssid_len;
3798         }
3799         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3800         if (params->wpa_ie)
3801                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3802                         params->wpa_ie);
3803
3804 #ifdef CONFIG_IEEE80211W
3805         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3806                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3807 #endif /* CONFIG_IEEE80211W */
3808
3809         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3810
3811         if (params->prev_bssid) {
3812                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3813                            MAC2STR(params->prev_bssid));
3814                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3815                         params->prev_bssid);
3816         }
3817
3818         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3819         msg = NULL;
3820         if (ret) {
3821                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3822                            "(%s)", ret, strerror(-ret));
3823                 nl80211_dump_scan(drv);
3824                 goto nla_put_failure;
3825         }
3826         ret = 0;
3827         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3828                    "successfully");
3829
3830 nla_put_failure:
3831         nlmsg_free(msg);
3832         return ret;
3833 }
3834
3835
3836 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3837                             int ifindex, int mode)
3838 {
3839         struct nl_msg *msg;
3840         int ret = -ENOBUFS;
3841
3842         msg = nlmsg_alloc();
3843         if (!msg)
3844                 return -ENOMEM;
3845
3846         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3847                     0, NL80211_CMD_SET_INTERFACE, 0);
3848         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3849         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3850
3851         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3852         if (!ret)
3853                 return 0;
3854 nla_put_failure:
3855         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3856                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3857         return ret;
3858 }
3859
3860
3861 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3862 {
3863         struct i802_bss *bss = priv;
3864         struct wpa_driver_nl80211_data *drv = bss->drv;
3865         int ret = -1;
3866         int nlmode;
3867
3868         switch (mode) {
3869         case 0:
3870                 nlmode = NL80211_IFTYPE_STATION;
3871                 break;
3872         case 1:
3873                 nlmode = NL80211_IFTYPE_ADHOC;
3874                 break;
3875         case 2:
3876                 nlmode = NL80211_IFTYPE_AP;
3877                 break;
3878         default:
3879                 return -1;
3880         }
3881
3882         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3883                 drv->nlmode = nlmode;
3884                 ret = 0;
3885                 goto done;
3886         }
3887
3888         if (nlmode == drv->nlmode) {
3889                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
3890                            "requested mode - ignore error");
3891                 ret = 0;
3892                 goto done; /* Already in the requested mode */
3893         }
3894
3895         /* mac80211 doesn't allow mode changes while the device is up, so
3896          * take the device down, try to set the mode again, and bring the
3897          * device back up.
3898          */
3899         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) == 0) {
3900                 /* Try to set the mode again while the interface is down */
3901                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3902                 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
3903                         ret = -1;
3904         }
3905
3906         if (!ret) {
3907                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
3908                            "interface is down");
3909                 drv->nlmode = nlmode;
3910         }
3911
3912 done:
3913         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3914                 /* Setup additional AP mode functionality if needed */
3915                 if (drv->monitor_ifidx < 0 &&
3916                     nl80211_create_monitor_interface(drv))
3917                         return -1;
3918         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3919                 /* Remove additional AP mode functionality */
3920                 nl80211_remove_monitor_interface(drv);
3921                 bss->beacon_set = 0;
3922         }
3923
3924         if (ret)
3925                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
3926                            "from %d failed", nlmode, drv->nlmode);
3927
3928         return ret;
3929 }
3930
3931
3932 static int wpa_driver_nl80211_get_capa(void *priv,
3933                                        struct wpa_driver_capa *capa)
3934 {
3935         struct i802_bss *bss = priv;
3936         struct wpa_driver_nl80211_data *drv = bss->drv;
3937         if (!drv->has_capability)
3938                 return -1;
3939         os_memcpy(capa, &drv->capa, sizeof(*capa));
3940         return 0;
3941 }
3942
3943
3944 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3945 {
3946         struct i802_bss *bss = priv;
3947         struct wpa_driver_nl80211_data *drv = bss->drv;
3948
3949         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3950                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3951         drv->operstate = state;
3952         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3953                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
3954 }
3955
3956
3957 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3958 {
3959         struct i802_bss *bss = priv;
3960         struct wpa_driver_nl80211_data *drv = bss->drv;
3961         struct nl_msg *msg;
3962         struct nl80211_sta_flag_update upd;
3963
3964         msg = nlmsg_alloc();
3965         if (!msg)
3966                 return -ENOMEM;
3967
3968         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3969                     0, NL80211_CMD_SET_STATION, 0);
3970
3971         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3972                     if_nametoindex(bss->ifname));
3973         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3974
3975         os_memset(&upd, 0, sizeof(upd));
3976         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3977         if (authorized)
3978                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3979         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3980
3981         return send_and_recv_msgs(drv, msg, NULL, NULL);
3982  nla_put_failure:
3983         return -ENOBUFS;
3984 }
3985
3986
3987 #ifdef HOSTAPD
3988
3989 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3990 {
3991         int i;
3992         int *old;
3993
3994         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3995                    ifidx);
3996         for (i = 0; i < drv->num_if_indices; i++) {
3997                 if (drv->if_indices[i] == 0) {
3998                         drv->if_indices[i] = ifidx;
3999                         return;
4000                 }
4001         }
4002
4003         if (drv->if_indices != drv->default_if_indices)
4004                 old = drv->if_indices;
4005         else
4006                 old = NULL;
4007
4008         drv->if_indices = os_realloc(old,
4009                                      sizeof(int) * (drv->num_if_indices + 1));
4010         if (!drv->if_indices) {
4011                 if (!old)
4012                         drv->if_indices = drv->default_if_indices;
4013                 else
4014                         drv->if_indices = old;
4015                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4016                            "interfaces");
4017                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4018                 return;
4019         }
4020         drv->if_indices[drv->num_if_indices] = ifidx;
4021         drv->num_if_indices++;
4022 }
4023
4024
4025 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4026 {
4027         int i;
4028
4029         for (i = 0; i < drv->num_if_indices; i++) {
4030                 if (drv->if_indices[i] == ifidx) {
4031                         drv->if_indices[i] = 0;
4032                         break;
4033                 }
4034         }
4035 }
4036
4037
4038 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4039 {
4040         int i;
4041
4042         for (i = 0; i < drv->num_if_indices; i++)
4043                 if (drv->if_indices[i] == ifidx)
4044                         return 1;
4045
4046         return 0;
4047 }
4048
4049
4050 static inline int min_int(int a, int b)
4051 {
4052         if (a < b)
4053                 return a;
4054         return b;
4055 }
4056
4057
4058 static int get_key_handler(struct nl_msg *msg, void *arg)
4059 {
4060         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4061         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4062
4063         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4064                   genlmsg_attrlen(gnlh, 0), NULL);
4065
4066         /*
4067          * TODO: validate the key index and mac address!
4068          * Otherwise, there's a race condition as soon as
4069          * the kernel starts sending key notifications.
4070          */
4071
4072         if (tb[NL80211_ATTR_KEY_SEQ])
4073                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4074                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4075         return NL_SKIP;
4076 }
4077
4078
4079 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4080                            int idx, u8 *seq)
4081 {
4082         struct i802_bss *bss = priv;
4083         struct wpa_driver_nl80211_data *drv = bss->drv;
4084         struct nl_msg *msg;
4085
4086         msg = nlmsg_alloc();
4087         if (!msg)
4088                 return -ENOMEM;
4089
4090         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4091                     0, NL80211_CMD_GET_KEY, 0);
4092
4093         if (addr)
4094                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4095         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4096         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4097
4098         memset(seq, 0, 6);
4099
4100         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4101  nla_put_failure:
4102         return -ENOBUFS;
4103 }
4104
4105
4106 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4107                               int mode)
4108 {
4109         struct i802_bss *bss = priv;
4110         struct wpa_driver_nl80211_data *drv = bss->drv;
4111         struct nl_msg *msg;
4112         u8 rates[NL80211_MAX_SUPP_RATES];
4113         u8 rates_len = 0;
4114         int i;
4115
4116         msg = nlmsg_alloc();
4117         if (!msg)
4118                 return -ENOMEM;
4119
4120         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4121                     NL80211_CMD_SET_BSS, 0);
4122
4123         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4124                 rates[rates_len++] = basic_rates[i] / 5;
4125
4126         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4127
4128         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4129
4130         return send_and_recv_msgs(drv, msg, NULL, NULL);
4131  nla_put_failure:
4132         return -ENOBUFS;
4133 }
4134
4135
4136 /* Set kernel driver on given frequency (MHz) */
4137 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4138 {
4139         struct i802_bss *bss = priv;
4140         struct wpa_driver_nl80211_data *drv = bss->drv;
4141         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4142                                            freq->sec_channel_offset);
4143 }
4144
4145
4146 static int i802_set_rts(void *priv, int rts)
4147 {
4148         struct i802_bss *bss = priv;
4149         struct wpa_driver_nl80211_data *drv = bss->drv;
4150         struct nl_msg *msg;
4151         int ret = -ENOBUFS;
4152         u32 val;
4153
4154         msg = nlmsg_alloc();
4155         if (!msg)
4156                 return -ENOMEM;
4157
4158         if (rts >= 2347)
4159                 val = (u32) -1;
4160         else
4161                 val = rts;
4162
4163         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4164                     0, NL80211_CMD_SET_WIPHY, 0);
4165         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4166         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4167
4168         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4169         if (!ret)
4170                 return 0;
4171 nla_put_failure:
4172         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4173                    "%d (%s)", rts, ret, strerror(-ret));
4174         return ret;
4175 }
4176
4177
4178 static int i802_set_frag(void *priv, int frag)
4179 {
4180         struct i802_bss *bss = priv;
4181         struct wpa_driver_nl80211_data *drv = bss->drv;
4182         struct nl_msg *msg;
4183         int ret = -ENOBUFS;
4184         u32 val;
4185
4186         msg = nlmsg_alloc();
4187         if (!msg)
4188                 return -ENOMEM;
4189
4190         if (frag >= 2346)
4191                 val = (u32) -1;
4192         else
4193                 val = frag;
4194
4195         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4196                     0, NL80211_CMD_SET_WIPHY, 0);
4197         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4198         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4199
4200         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4201         if (!ret)
4202                 return 0;
4203 nla_put_failure:
4204         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4205                    "%d: %d (%s)", frag, ret, strerror(-ret));
4206         return ret;
4207 }
4208
4209
4210 static int i802_flush(void *priv)
4211 {
4212         struct i802_bss *bss = priv;
4213         struct wpa_driver_nl80211_data *drv = bss->drv;
4214         struct nl_msg *msg;
4215
4216         msg = nlmsg_alloc();
4217         if (!msg)
4218                 return -1;
4219
4220         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4221                     0, NL80211_CMD_DEL_STATION, 0);
4222
4223         /*
4224          * XXX: FIX! this needs to flush all VLANs too
4225          */
4226         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4227                     if_nametoindex(bss->ifname));
4228
4229         return send_and_recv_msgs(drv, msg, NULL, NULL);
4230  nla_put_failure:
4231         return -ENOBUFS;
4232 }
4233
4234
4235 static int get_sta_handler(struct nl_msg *msg, void *arg)
4236 {
4237         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4238         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4239         struct hostap_sta_driver_data *data = arg;
4240         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4241         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4242                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4243                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4244                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4245                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4246                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4247         };
4248
4249         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4250                   genlmsg_attrlen(gnlh, 0), NULL);
4251
4252         /*
4253          * TODO: validate the interface and mac address!
4254          * Otherwise, there's a race condition as soon as
4255          * the kernel starts sending station notifications.
4256          */
4257
4258         if (!tb[NL80211_ATTR_STA_INFO]) {
4259                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4260                 return NL_SKIP;
4261         }
4262         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4263                              tb[NL80211_ATTR_STA_INFO],
4264                              stats_policy)) {
4265                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4266                 return NL_SKIP;
4267         }
4268
4269         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4270                 data->inactive_msec =
4271                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4272         if (stats[NL80211_STA_INFO_RX_BYTES])
4273                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4274         if (stats[NL80211_STA_INFO_TX_BYTES])
4275                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4276         if (stats[NL80211_STA_INFO_RX_PACKETS])
4277                 data->rx_packets =
4278                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4279         if (stats[NL80211_STA_INFO_TX_PACKETS])
4280                 data->tx_packets =
4281                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4282
4283         return NL_SKIP;
4284 }
4285
4286 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4287                               const u8 *addr)
4288 {
4289         struct i802_bss *bss = priv;
4290         struct wpa_driver_nl80211_data *drv = bss->drv;
4291         struct nl_msg *msg;
4292
4293         os_memset(data, 0, sizeof(*data));
4294         msg = nlmsg_alloc();
4295         if (!msg)
4296                 return -ENOMEM;
4297
4298         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4299                     0, NL80211_CMD_GET_STATION, 0);
4300
4301         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4302         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4303
4304         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4305  nla_put_failure:
4306         return -ENOBUFS;
4307 }
4308
4309
4310 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4311                                     int cw_min, int cw_max, int burst_time)
4312 {
4313         struct i802_bss *bss = priv;
4314         struct wpa_driver_nl80211_data *drv = bss->drv;
4315         struct nl_msg *msg;
4316         struct nlattr *txq, *params;
4317
4318         msg = nlmsg_alloc();
4319         if (!msg)
4320                 return -1;
4321
4322         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4323                     0, NL80211_CMD_SET_WIPHY, 0);
4324
4325         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4326
4327         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4328         if (!txq)
4329                 goto nla_put_failure;
4330
4331         /* We are only sending parameters for a single TXQ at a time */
4332         params = nla_nest_start(msg, 1);
4333         if (!params)
4334                 goto nla_put_failure;
4335
4336         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4337         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4338          * 32 usec, so need to convert the value here. */
4339         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4340         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4341         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4342         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4343
4344         nla_nest_end(msg, params);
4345
4346         nla_nest_end(msg, txq);
4347
4348         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4349                 return 0;
4350  nla_put_failure:
4351         return -1;
4352 }
4353
4354
4355 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4356 {
4357         struct i802_bss *bss = priv;
4358         struct wpa_driver_nl80211_data *drv = bss->drv;
4359         struct nl_msg *msg;
4360
4361         msg = nlmsg_alloc();
4362         if (!msg)
4363                 return -ENOMEM;
4364
4365         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4366                     NL80211_CMD_SET_BSS, 0);
4367
4368         if (cts >= 0)
4369                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4370         if (preamble >= 0)
4371                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4372         if (slot >= 0)
4373                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4374
4375         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4376
4377         return send_and_recv_msgs(drv, msg, NULL, NULL);
4378  nla_put_failure:
4379         return -ENOBUFS;
4380 }
4381
4382
4383 static int i802_set_cts_protect(void *priv, int value)
4384 {
4385         return i802_set_bss(priv, value, -1, -1);
4386 }
4387
4388
4389 static int i802_set_preamble(void *priv, int value)
4390 {
4391         return i802_set_bss(priv, -1, value, -1);
4392 }
4393
4394
4395 static int i802_set_short_slot_time(void *priv, int value)
4396 {
4397         return i802_set_bss(priv, -1, -1, value);
4398 }
4399
4400
4401 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4402                              const char *ifname, int vlan_id)
4403 {
4404         struct i802_bss *bss = priv;
4405         struct wpa_driver_nl80211_data *drv = bss->drv;
4406         struct nl_msg *msg;
4407
4408         msg = nlmsg_alloc();
4409         if (!msg)
4410                 return -ENOMEM;
4411
4412         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4413                     0, NL80211_CMD_SET_STATION, 0);
4414
4415         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4416                     if_nametoindex(bss->ifname));
4417         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4418         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4419                     if_nametoindex(ifname));
4420
4421         return send_and_recv_msgs(drv, msg, NULL, NULL);
4422  nla_put_failure:
4423         return -ENOBUFS;
4424 }
4425
4426
4427 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4428 {
4429         struct i802_bss *bss = priv;
4430         struct wpa_driver_nl80211_data *drv = bss->drv;
4431         char name[IFNAMSIZ + 1];
4432
4433         os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
4434         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4435                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4436         if (val) {
4437                 if (nl80211_create_iface(drv, name, NL80211_IFTYPE_AP_VLAN,
4438                                          NULL, 1) < 0)
4439                         return -1;
4440                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4441                 return i802_set_sta_vlan(priv, addr, name, 0);
4442         } else {
4443                 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
4444                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4445                                                     name);
4446         }
4447 }
4448
4449
4450 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4451 {
4452         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4453         struct sockaddr_ll lladdr;
4454         unsigned char buf[3000];
4455         int len;
4456         socklen_t fromlen = sizeof(lladdr);
4457
4458         len = recvfrom(sock, buf, sizeof(buf), 0,
4459                        (struct sockaddr *)&lladdr, &fromlen);
4460         if (len < 0) {
4461                 perror("recv");
4462                 return;
4463         }
4464
4465         if (have_ifidx(drv, lladdr.sll_ifindex))
4466                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4467 }
4468
4469
4470 static int i802_get_inact_sec(void *priv, const u8 *addr)
4471 {
4472         struct hostap_sta_driver_data data;
4473         int ret;
4474
4475         data.inactive_msec = (unsigned long) -1;
4476         ret = i802_read_sta_data(priv, &data, addr);
4477         if (ret || data.inactive_msec == (unsigned long) -1)
4478                 return -1;
4479         return data.inactive_msec / 1000;
4480 }
4481
4482
4483 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4484 {
4485 #if 0
4486         /* TODO */
4487 #endif
4488         return 0;
4489 }
4490
4491
4492 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4493                            int reason)
4494 {
4495         struct i802_bss *bss = priv;
4496         struct ieee80211_mgmt mgmt;
4497
4498         memset(&mgmt, 0, sizeof(mgmt));
4499         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4500                                           WLAN_FC_STYPE_DEAUTH);
4501         memcpy(mgmt.da, addr, ETH_ALEN);
4502         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4503         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4504         mgmt.u.deauth.reason_code = host_to_le16(reason);
4505         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4506                                             IEEE80211_HDRLEN +
4507                                             sizeof(mgmt.u.deauth));
4508 }
4509
4510
4511 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4512                              int reason)
4513 {
4514         struct i802_bss *bss = priv;
4515         struct ieee80211_mgmt mgmt;
4516
4517         memset(&mgmt, 0, sizeof(mgmt));
4518         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4519                                           WLAN_FC_STYPE_DISASSOC);
4520         memcpy(mgmt.da, addr, ETH_ALEN);
4521         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4522         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4523         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4524         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4525                                             IEEE80211_HDRLEN +
4526                                             sizeof(mgmt.u.disassoc));
4527 }
4528
4529
4530 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4531                              const char *brname, const char *ifname)
4532 {
4533         int ifindex;
4534         char in_br[IFNAMSIZ];
4535
4536         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4537         ifindex = if_nametoindex(brname);
4538         if (ifindex == 0) {
4539                 /*
4540                  * Bridge was configured, but the bridge device does
4541                  * not exist. Try to add it now.
4542                  */
4543                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4544                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4545                                    "bridge interface %s: %s",
4546                                    brname, strerror(errno));
4547                         return -1;
4548                 }
4549                 drv->added_bridge = 1;
4550                 add_ifidx(drv, if_nametoindex(brname));
4551         }
4552
4553         if (linux_br_get(in_br, ifname) == 0) {
4554                 if (os_strcmp(in_br, brname) == 0)
4555                         return 0; /* already in the bridge */
4556
4557                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4558                            "bridge %s", ifname, in_br);
4559                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4560                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4561                                    "remove interface %s from bridge "
4562                                    "%s: %s",
4563                                    ifname, brname, strerror(errno));
4564                         return -1;
4565                 }
4566         }
4567
4568         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4569                    ifname, brname);
4570         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4571                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4572                            "into bridge %s: %s",
4573                            ifname, brname, strerror(errno));
4574                 return -1;
4575         }
4576         drv->added_if_into_bridge = 1;
4577
4578         return 0;
4579 }
4580
4581
4582 static void *i802_init(struct hostapd_data *hapd,
4583                        struct wpa_init_params *params)
4584 {
4585         struct wpa_driver_nl80211_data *drv;
4586         struct i802_bss *bss;
4587         size_t i;
4588         char brname[IFNAMSIZ];
4589         int ifindex, br_ifindex;
4590         int br_added = 0;
4591
4592         bss = wpa_driver_nl80211_init(hapd, params->ifname);
4593         if (bss == NULL)
4594                 return NULL;
4595
4596         drv = bss->drv;
4597         if (linux_br_get(brname, params->ifname) == 0) {
4598                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4599                            params->ifname, brname);
4600                 br_ifindex = if_nametoindex(brname);
4601         } else {
4602                 brname[0] = '\0';
4603                 br_ifindex = 0;
4604         }
4605
4606         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4607         drv->if_indices = drv->default_if_indices;
4608         for (i = 0; i < params->num_bridge; i++) {
4609                 if (params->bridge[i]) {
4610                         ifindex = if_nametoindex(params->bridge[i]);
4611                         if (ifindex)
4612                                 add_ifidx(drv, ifindex);
4613                         if (ifindex == br_ifindex)
4614                                 br_added = 1;
4615                 }
4616         }
4617         if (!br_added && br_ifindex &&
4618             (params->num_bridge == 0 || !params->bridge[0]))
4619                 add_ifidx(drv, br_ifindex);
4620
4621         /* start listening for EAPOL on the default AP interface */
4622         add_ifidx(drv, drv->ifindex);
4623
4624         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
4625                 goto failed;
4626
4627         if (params->bssid) {
4628                 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
4629                                        params->bssid))
4630                         goto failed;
4631         }
4632
4633         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
4634                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4635                            "into AP mode", bss->ifname);
4636                 goto failed;
4637         }
4638
4639         if (params->num_bridge && params->bridge[0] &&
4640             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
4641                 goto failed;
4642
4643         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
4644                 goto failed;
4645
4646         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4647         if (drv->eapol_sock < 0) {
4648                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4649                 goto failed;
4650         }
4651
4652         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4653         {
4654                 printf("Could not register read socket for eapol\n");
4655                 goto failed;
4656         }
4657
4658         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
4659                 goto failed;
4660
4661         return bss;
4662
4663 failed:
4664         nl80211_remove_monitor_interface(drv);
4665         if (drv->ioctl_sock >= 0)
4666                 close(drv->ioctl_sock);
4667
4668         genl_family_put(drv->nl80211);
4669         nl_cache_free(drv->nl_cache);
4670         nl_handle_destroy(drv->nl_handle);
4671         nl_cb_put(drv->nl_cb);
4672
4673         os_free(drv);
4674         return NULL;
4675 }
4676
4677
4678 static void i802_deinit(void *priv)
4679 {
4680         wpa_driver_nl80211_deinit(priv);
4681 }
4682
4683 #endif /* HOSTAPD */
4684
4685
4686 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4687         enum wpa_driver_if_type type)
4688 {
4689         switch (type) {
4690         case WPA_IF_STATION:
4691                 return NL80211_IFTYPE_STATION;
4692         case WPA_IF_AP_VLAN:
4693                 return NL80211_IFTYPE_AP_VLAN;
4694         case WPA_IF_AP_BSS:
4695                 return NL80211_IFTYPE_AP;
4696         }
4697         return -1;
4698 }
4699
4700
4701 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
4702                                      const char *ifname, const u8 *addr,
4703                                      void *bss_ctx, void **drv_priv)
4704 {
4705         struct i802_bss *bss = priv;
4706         struct wpa_driver_nl80211_data *drv = bss->drv;
4707         int ifidx;
4708 #ifdef HOSTAPD
4709         struct i802_bss *new_bss = NULL;
4710
4711         if (type == WPA_IF_AP_BSS) {
4712                 new_bss = os_zalloc(sizeof(*new_bss));
4713                 if (new_bss == NULL)
4714                         return -1;
4715         }
4716 #endif /* HOSTAPD */
4717
4718         ifidx = nl80211_create_iface(drv, ifname,
4719                                      wpa_driver_nl80211_if_type(type), addr,
4720                                      0);
4721         if (ifidx < 0) {
4722 #ifdef HOSTAPD
4723                 os_free(new_bss);
4724 #endif /* HOSTAPD */
4725                 return -1;
4726         }
4727
4728 #ifdef HOSTAPD
4729         if (type == WPA_IF_AP_BSS) {
4730                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
4731                         nl80211_remove_iface(drv, ifidx);
4732                         os_free(new_bss);
4733                         return -1;
4734                 }
4735                 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
4736                 new_bss->ifindex = ifidx;
4737                 new_bss->drv = drv;
4738                 new_bss->next = drv->first_bss.next;
4739                 drv->first_bss.next = new_bss;
4740                 if (drv_priv)
4741                         *drv_priv = new_bss;
4742         }
4743 #endif /* HOSTAPD */
4744
4745         return 0;
4746 }
4747
4748
4749 static int wpa_driver_nl80211_if_remove(void *priv,
4750                                         enum wpa_driver_if_type type,
4751                                         const char *ifname)
4752 {
4753         struct i802_bss *bss = priv;
4754         struct wpa_driver_nl80211_data *drv = bss->drv;
4755         int ifindex = if_nametoindex(ifname);
4756
4757         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
4758                    __func__, type, ifname, ifindex);
4759         if (ifindex <= 0)
4760                 return -1;
4761         nl80211_remove_iface(drv, ifindex);
4762
4763 #ifdef HOSTAPD
4764         if (type != WPA_IF_AP_BSS)
4765                 return 0;
4766
4767         if (bss != &drv->first_bss) {
4768                 struct i802_bss *tbss = &drv->first_bss;
4769
4770                 while (tbss) {
4771                         if (tbss->next != bss)
4772                                 continue;
4773
4774                         tbss->next = bss->next;
4775                         os_free(bss);
4776                         break;
4777                 }
4778         }
4779 #endif /* HOSTAPD */
4780
4781         return 0;
4782 }
4783
4784
4785 static int cookie_handler(struct nl_msg *msg, void *arg)
4786 {
4787         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4788         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4789         u64 *cookie = arg;
4790         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4791                   genlmsg_attrlen(gnlh, 0), NULL);
4792         if (tb[NL80211_ATTR_COOKIE])
4793                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
4794         return NL_SKIP;
4795 }
4796
4797
4798 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
4799                                           const u8 *dst, const u8 *src,
4800                                           const u8 *bssid,
4801                                           const u8 *data, size_t data_len)
4802 {
4803         struct i802_bss *bss = priv;
4804         struct wpa_driver_nl80211_data *drv = bss->drv;
4805         int ret = -1;
4806         struct nl_msg *msg;
4807         u8 *buf;
4808         struct ieee80211_hdr *hdr;
4809         u64 cookie;
4810
4811         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
4812                    drv->ifindex);
4813
4814         buf = os_zalloc(24 + data_len);
4815         if (buf == NULL)
4816                 return ret;
4817         os_memcpy(buf + 24, data, data_len);
4818         hdr = (struct ieee80211_hdr *) buf;
4819         hdr->frame_control =
4820                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
4821         os_memcpy(hdr->addr1, dst, ETH_ALEN);
4822         os_memcpy(hdr->addr2, src, ETH_ALEN);
4823         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
4824
4825         if (drv->nlmode == NL80211_IFTYPE_AP) {
4826                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
4827                 os_free(buf);
4828                 return ret;
4829         }
4830
4831         msg = nlmsg_alloc();
4832         if (!msg)
4833                 return -1;
4834
4835         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4836                     NL80211_CMD_ACTION, 0);
4837
4838         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4839         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4840         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
4841         os_free(buf);
4842
4843         cookie = 0;
4844         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4845         msg = NULL;
4846         if (ret) {
4847                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
4848                            "(%s)", ret, strerror(-ret));
4849                 goto nla_put_failure;
4850         }
4851         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
4852                    "cookie 0x%llx", (long long unsigned int) cookie);
4853         drv->send_action_cookie = cookie;
4854         drv->pending_send_action = 1;
4855         ret = 0;
4856
4857 nla_put_failure:
4858         nlmsg_free(msg);
4859         return ret;
4860 }
4861
4862
4863 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
4864                                                 unsigned int duration)
4865 {
4866         struct i802_bss *bss = priv;
4867         struct wpa_driver_nl80211_data *drv = bss->drv;
4868         struct nl_msg *msg;
4869         int ret;
4870         u64 cookie;
4871
4872         msg = nlmsg_alloc();
4873         if (!msg)
4874                 return -1;
4875
4876         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4877                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
4878
4879         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4880         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4881         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
4882
4883         cookie = 0;
4884         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4885         if (ret == 0) {
4886                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
4887                            "0x%llx for freq=%u MHz duration=%u",
4888                            (long long unsigned int) cookie, freq, duration);
4889                 drv->remain_on_chan_cookie = cookie;
4890                 return 0;
4891         }
4892         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
4893                    "(freq=%d): %d (%s)", freq, ret, strerror(-ret));
4894 nla_put_failure:
4895         return -1;
4896 }
4897
4898
4899 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
4900 {
4901         struct i802_bss *bss = priv;
4902         struct wpa_driver_nl80211_data *drv = bss->drv;
4903         struct nl_msg *msg;
4904         int ret;
4905
4906         if (!drv->pending_remain_on_chan) {
4907                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
4908                            "to cancel");
4909                 return -1;
4910         }
4911
4912         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
4913                    "0x%llx",
4914                    (long long unsigned int) drv->remain_on_chan_cookie);
4915
4916         msg = nlmsg_alloc();
4917         if (!msg)
4918                 return -1;
4919
4920         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4921                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
4922
4923         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4924         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
4925
4926         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4927         if (ret == 0)
4928                 return 0;
4929         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
4930                    "%d (%s)", ret, strerror(-ret));
4931 nla_put_failure:
4932         return -1;
4933 }
4934
4935
4936 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
4937                                                         void *timeout_ctx)
4938 {
4939         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4940         if (drv->monitor_ifidx < 0)
4941                 return; /* monitor interface already removed */
4942
4943         if (drv->nlmode != NL80211_IFTYPE_STATION)
4944                 return; /* not in station mode anymore */
4945
4946         if (drv->probe_req_report)
4947                 return; /* reporting enabled */
4948
4949         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
4950                    "Probe Request reporting needed anymore");
4951         nl80211_remove_monitor_interface(drv);
4952 }
4953
4954
4955 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
4956 {
4957         struct i802_bss *bss = priv;
4958         struct wpa_driver_nl80211_data *drv = bss->drv;
4959
4960         if (drv->nlmode != NL80211_IFTYPE_STATION) {
4961                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
4962                            "allowed in station mode (iftype=%d)",
4963                            drv->nlmode);
4964                 return -1;
4965         }
4966         drv->probe_req_report = report;
4967
4968         if (report) {
4969                 eloop_cancel_timeout(
4970                         wpa_driver_nl80211_probe_req_report_timeout,
4971                         drv, NULL);
4972                 if (drv->monitor_ifidx < 0 &&
4973                     nl80211_create_monitor_interface(drv))
4974                         return -1;
4975         } else {
4976                 /*
4977                  * It takes a while to remove the monitor interface, so try to
4978                  * avoid doing this if it is needed again shortly. Instead,
4979                  * schedule the interface to be removed later if no need for it
4980                  * is seen.
4981                  */
4982                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
4983                            "to be removed after 10 seconds of no use");
4984                 eloop_register_timeout(
4985                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
4986                         drv, NULL);
4987         }
4988
4989         return 0;
4990 }
4991
4992
4993 static int wpa_driver_nl80211_alloc_interface_addr(void *priv, u8 *addr,
4994                                                    char *ifname)
4995 {
4996         struct i802_bss *bss = priv;
4997         struct wpa_driver_nl80211_data *drv = bss->drv;
4998
4999         if (ifname)
5000                 ifname[0] = '\0';
5001
5002         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, addr) < 0)
5003                 return -1;
5004
5005         if (addr[0] & 0x02) {
5006                 /* TODO: add support for generating multiple addresses */
5007                 addr[0] ^= 0x80;
5008         } else
5009                 addr[0] = 0x02; /* locally administered */
5010
5011         return 0;
5012 }
5013
5014
5015 static void wpa_driver_nl80211_release_interface_addr(void *priv,
5016                                                       const u8 *addr)
5017 {
5018         /* TODO: keep list of allocated address and release them here */
5019 }
5020
5021
5022 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5023                                      int ifindex, int disabled)
5024 {
5025         struct nl_msg *msg;
5026         struct nlattr *bands, *band;
5027         int ret;
5028
5029         msg = nlmsg_alloc();
5030         if (!msg)
5031                 return -1;
5032
5033         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5034                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5035         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5036
5037         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5038         if (!bands)
5039                 goto nla_put_failure;
5040
5041         /*
5042          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5043          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5044          * rates. All 5 GHz rates are left enabled.
5045          */
5046         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5047         if (!band)
5048                 goto nla_put_failure;
5049         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5050                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5051         nla_nest_end(msg, band);
5052
5053         nla_nest_end(msg, bands);
5054
5055         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5056         msg = NULL;
5057         if (ret) {
5058                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5059                            "(%s)", ret, strerror(-ret));
5060         }
5061
5062         return ret;
5063
5064 nla_put_failure:
5065         nlmsg_free(msg);
5066         return -1;
5067 }
5068
5069
5070 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5071 {
5072         struct i802_bss *bss = priv;
5073         struct wpa_driver_nl80211_data *drv = bss->drv;
5074         drv->disable_11b_rates = disabled;
5075         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5076 }
5077
5078
5079 static int wpa_driver_nl80211_deinit_ap(void *priv)
5080 {
5081         struct i802_bss *bss = priv;
5082         struct wpa_driver_nl80211_data *drv = bss->drv;
5083         if (drv->nlmode != NL80211_IFTYPE_AP)
5084                 return -1;
5085         wpa_driver_nl80211_del_beacon(drv);
5086         return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
5087 }
5088
5089
5090 static void wpa_driver_nl80211_resume(void *priv)
5091 {
5092         struct i802_bss *bss = priv;
5093         struct wpa_driver_nl80211_data *drv = bss->drv;
5094         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
5095                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5096                            "resume event");
5097         }
5098 }
5099
5100
5101 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
5102                                   const u8 *ies, size_t ies_len)
5103 {
5104         struct i802_bss *bss = priv;
5105         struct wpa_driver_nl80211_data *drv = bss->drv;
5106         int ret;
5107         u8 *data, *pos;
5108         size_t data_len;
5109         u8 own_addr[ETH_ALEN];
5110
5111         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
5112                 return -1;
5113
5114         if (action != 1) {
5115                 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
5116                            "action %d", action);
5117                 return -1;
5118         }
5119
5120         /*
5121          * Action frame payload:
5122          * Category[1] = 6 (Fast BSS Transition)
5123          * Action[1] = 1 (Fast BSS Transition Request)
5124          * STA Address
5125          * Target AP Address
5126          * FT IEs
5127          */
5128
5129         data_len = 2 + 2 * ETH_ALEN + ies_len;
5130         data = os_malloc(data_len);
5131         if (data == NULL)
5132                 return -1;
5133         pos = data;
5134         *pos++ = 0x06; /* FT Action category */
5135         *pos++ = action;
5136         os_memcpy(pos, own_addr, ETH_ALEN);
5137         pos += ETH_ALEN;
5138         os_memcpy(pos, target_ap, ETH_ALEN);
5139         pos += ETH_ALEN;
5140         os_memcpy(pos, ies, ies_len);
5141
5142         ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
5143                                              own_addr, drv->bssid,
5144                                              data, data_len);
5145         os_free(data);
5146
5147         return ret;
5148 }
5149
5150
5151 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5152         .name = "nl80211",
5153         .desc = "Linux nl80211/cfg80211",
5154         .get_bssid = wpa_driver_nl80211_get_bssid,
5155         .get_ssid = wpa_driver_nl80211_get_ssid,
5156         .set_key = wpa_driver_nl80211_set_key,
5157         .scan2 = wpa_driver_nl80211_scan,
5158         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5159         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5160         .disassociate = wpa_driver_nl80211_disassociate,
5161         .authenticate = wpa_driver_nl80211_authenticate,
5162         .associate = wpa_driver_nl80211_associate,
5163         .init = wpa_driver_nl80211_init,
5164         .deinit = wpa_driver_nl80211_deinit,
5165         .get_capa = wpa_driver_nl80211_get_capa,
5166         .set_operstate = wpa_driver_nl80211_set_operstate,
5167         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5168         .set_country = wpa_driver_nl80211_set_country,
5169         .set_beacon = wpa_driver_nl80211_set_beacon,
5170         .if_add = wpa_driver_nl80211_if_add,
5171         .if_remove = wpa_driver_nl80211_if_remove,
5172         .send_mlme = wpa_driver_nl80211_send_mlme,
5173         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5174         .sta_add = wpa_driver_nl80211_sta_add,
5175         .sta_remove = wpa_driver_nl80211_sta_remove,
5176         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5177         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5178 #ifdef HOSTAPD
5179         .hapd_init = i802_init,
5180         .hapd_deinit = i802_deinit,
5181         .get_seqnum = i802_get_seqnum,
5182         .flush = i802_flush,
5183         .read_sta_data = i802_read_sta_data,
5184         .sta_deauth = i802_sta_deauth,
5185         .sta_disassoc = i802_sta_disassoc,
5186         .get_inact_sec = i802_get_inact_sec,
5187         .sta_clear_stats = i802_sta_clear_stats,
5188         .set_freq = i802_set_freq,
5189         .set_rts = i802_set_rts,
5190         .set_frag = i802_set_frag,
5191         .set_rate_sets = i802_set_rate_sets,
5192         .set_cts_protect = i802_set_cts_protect,
5193         .set_preamble = i802_set_preamble,
5194         .set_short_slot_time = i802_set_short_slot_time,
5195         .set_tx_queue_params = i802_set_tx_queue_params,
5196         .set_sta_vlan = i802_set_sta_vlan,
5197         .set_wds_sta = i802_set_wds_sta,
5198 #endif /* HOSTAPD */
5199         .send_action = wpa_driver_nl80211_send_action,
5200         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5201         .cancel_remain_on_channel =
5202         wpa_driver_nl80211_cancel_remain_on_channel,
5203         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5204         .alloc_interface_addr = wpa_driver_nl80211_alloc_interface_addr,
5205         .release_interface_addr = wpa_driver_nl80211_release_interface_addr,
5206         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5207         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5208         .resume = wpa_driver_nl80211_resume,
5209         .send_ft_action = nl80211_send_ft_action,
5210 };