src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009-2010, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/genl/ctrl.h>
  25 #include <netpacket/packet.h>
  26 #include <linux/filter.h>
  27 #include "nl80211_copy.h"
  28
  29 #include "common.h"
  30 #include "eloop.h"
  31 #include "common/ieee802_11_defs.h"
  32 #include "netlink.h"
  33 #include "linux_ioctl.h"
  34 #include "radiotap.h"
  35 #include "radiotap_iter.h"
  36 #include "driver.h"
  37
  38 #ifdef CONFIG_LIBNL20
  39 /* libnl 2.0 compatibility code */
  40 #define nl_handle nl_sock
  41 #define nl_handle_alloc_cb nl_socket_alloc_cb
  42 #define nl_handle_destroy nl_socket_free
  43 #endif /* CONFIG_LIBNL20 */
  44
  45
  46 #ifndef IFF_LOWER_UP
  47 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  48 #endif
  49 #ifndef IFF_DORMANT
  50 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  51 #endif
  52
  53 #ifndef IF_OPER_DORMANT
  54 #define IF_OPER_DORMANT 5
  55 #endif
  56 #ifndef IF_OPER_UP
  57 #define IF_OPER_UP 6
  58 #endif
  59
  60 struct i802_bss {
  61         struct wpa_driver_nl80211_data *drv;
  62         struct i802_bss *next;
  63         int ifindex;
  64         char ifname[IFNAMSIZ + 1];
  65         unsigned int beacon_set:1;
  66 };
  67
  68 struct wpa_driver_nl80211_data {
  69         void *ctx;
  70         struct netlink_data *netlink;
  71         int ioctl_sock; /* socket for ioctl() use */
  72         char brname[IFNAMSIZ];
  73         int ifindex;
  74         int if_removed;
  75         struct wpa_driver_capa capa;
  76         int has_capability;
  77
  78         int operstate;
  79
  80         int scan_complete_events;
  81
  82         struct nl_handle *nl_handle;
  83         struct nl_handle *nl_handle_event;
  84         struct nl_cache *nl_cache;
  85         struct nl_cache *nl_cache_event;
  86         struct nl_cb *nl_cb;
  87         struct genl_family *nl80211;
  88
  89         u8 auth_bssid[ETH_ALEN];
  90         u8 bssid[ETH_ALEN];
  91         int associated;
  92         u8 ssid[32];
  93         size_t ssid_len;
  94         int nlmode;
  95         int ap_scan_as_station;
  96         unsigned int assoc_freq;
  97
  98         int monitor_sock;
  99         int monitor_ifidx;
 100         int probe_req_report;
 101         int disable_11b_rates;
 102
 103         unsigned int pending_remain_on_chan:1;
 104         unsigned int pending_send_action:1;
 105         unsigned int added_bridge:1;
 106         unsigned int added_if_into_bridge:1;
 107
 108         u64 remain_on_chan_cookie;
 109         u64 send_action_cookie;
 110
 111         struct wpa_driver_scan_filter *filter_ssids;
 112         size_t num_filter_ssids;
 113
 114         struct i802_bss first_bss;
 115
 116 #ifdef HOSTAPD
 117         int eapol_sock; /* socket for EAPOL frames */
 118
 119         int default_if_indices[16];
 120         int *if_indices;
 121         int num_if_indices;
 122
 123         int last_freq;
 124         int last_freq_ht;
 125 #endif /* HOSTAPD */
 126 };
 127
 128
 129 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 130                                             void *timeout_ctx);
 131 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 132 static int
 133 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 134 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 135                                    const u8 *addr, int cmd, u16 reason_code,
 136                                    int local_state_change);
 137 static void nl80211_remove_monitor_interface(
 138         struct wpa_driver_nl80211_data *drv);
 139
 140 #ifdef HOSTAPD
 141 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 142 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 143 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 144 static int wpa_driver_nl80211_if_remove(void *priv,
 145                                         enum wpa_driver_if_type type,
 146                                         const char *ifname);
 147 #else /* HOSTAPD */
 148 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
 149 {
 150         return 0;
 151 }
 152 #endif /* HOSTAPD */
 153
 154 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 155 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
 156                                                         void *timeout_ctx);
 157 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
 158                                      int ifindex, int disabled);
 159
 160
 161 /* nl80211 code */
 162 static int ack_handler(struct nl_msg *msg, void *arg)
 163 {
 164         int *err = arg;
 165         *err = 0;
 166         return NL_STOP;
 167 }
 168
 169 static int finish_handler(struct nl_msg *msg, void *arg)
 170 {
 171         int *ret = arg;
 172         *ret = 0;
 173         return NL_SKIP;
 174 }
 175
 176 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 177                          void *arg)
 178 {
 179         int *ret = arg;
 180         *ret = err->error;
 181         return NL_SKIP;
 182 }
 183
 184
 185 static int no_seq_check(struct nl_msg *msg, void *arg)
 186 {
 187         return NL_OK;
 188 }
 189
 190
 191 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
 192                          struct nl_handle *nl_handle, struct nl_msg *msg,
 193                          int (*valid_handler)(struct nl_msg *, void *),
 194                          void *valid_data)
 195 {
 196         struct nl_cb *cb;
 197         int err = -ENOMEM;
 198
 199         cb = nl_cb_clone(drv->nl_cb);
 200         if (!cb)
 201                 goto out;
 202
 203         err = nl_send_auto_complete(nl_handle, msg);
 204         if (err < 0)
 205                 goto out;
 206
 207         err = 1;
 208
 209         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 210         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 211         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 212
 213         if (valid_handler)
 214                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 215                           valid_handler, valid_data);
 216
 217         while (err > 0)
 218                 nl_recvmsgs(nl_handle, cb);
 219  out:
 220         nl_cb_put(cb);
 221         nlmsg_free(msg);
 222         return err;
 223 }
 224
 225
 226 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 227                               struct nl_msg *msg,
 228                               int (*valid_handler)(struct nl_msg *, void *),
 229                               void *valid_data)
 230 {
 231         return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
 232                              valid_data);
 233 }
 234
 235
 236 struct family_data {
 237         const char *group;
 238         int id;
 239 };
 240
 241
 242 static int family_handler(struct nl_msg *msg, void *arg)
 243 {
 244         struct family_data *res = arg;
 245         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 246         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 247         struct nlattr *mcgrp;
 248         int i;
 249
 250         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 251                   genlmsg_attrlen(gnlh, 0), NULL);
 252         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 253                 return NL_SKIP;
 254
 255         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 256                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 257                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 258                           nla_len(mcgrp), NULL);
 259                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 260                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 261                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 262                                res->group,
 263                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 264                         continue;
 265                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 266                 break;
 267         };
 268
 269         return NL_SKIP;
 270 }
 271
 272
 273 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 274                                const char *family, const char *group)
 275 {
 276         struct nl_msg *msg;
 277         int ret = -1;
 278         struct family_data res = { group, -ENOENT };
 279
 280         msg = nlmsg_alloc();
 281         if (!msg)
 282                 return -ENOMEM;
 283         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 284                     0, 0, CTRL_CMD_GETFAMILY, 0);
 285         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 286
 287         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 288         msg = NULL;
 289         if (ret == 0)
 290                 ret = res.id;
 291
 292 nla_put_failure:
 293         nlmsg_free(msg);
 294         return ret;
 295 }
 296
 297
 298 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 299 {
 300         struct i802_bss *bss = priv;
 301         struct wpa_driver_nl80211_data *drv = bss->drv;
 302         if (!drv->associated)
 303                 return -1;
 304         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 305         return 0;
 306 }
 307
 308
 309 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 310 {
 311         struct i802_bss *bss = priv;
 312         struct wpa_driver_nl80211_data *drv = bss->drv;
 313         if (!drv->associated)
 314                 return -1;
 315         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 316         return drv->ssid_len;
 317 }
 318
 319
 320 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 321                                           char *buf, size_t len, int del)
 322 {
 323         union wpa_event_data event;
 324
 325         os_memset(&event, 0, sizeof(event));
 326         if (len > sizeof(event.interface_status.ifname))
 327                 len = sizeof(event.interface_status.ifname) - 1;
 328         os_memcpy(event.interface_status.ifname, buf, len);
 329         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 330                 EVENT_INTERFACE_ADDED;
 331
 332         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 333                    del ? "DEL" : "NEW",
 334                    event.interface_status.ifname,
 335                    del ? "removed" : "added");
 336
 337         if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
 338                 if (del)
 339                         drv->if_removed = 1;
 340                 else
 341                         drv->if_removed = 0;
 342         }
 343
 344         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 345 }
 346
 347
 348 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 349                                          u8 *buf, size_t len)
 350 {
 351         int attrlen, rta_len;
 352         struct rtattr *attr;
 353
 354         attrlen = len;
 355         attr = (struct rtattr *) buf;
 356
 357         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 358         while (RTA_OK(attr, attrlen)) {
 359                 if (attr->rta_type == IFLA_IFNAME) {
 360                         if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
 361                             == 0)
 362                                 return 1;
 363                         else
 364                                 break;
 365                 }
 366                 attr = RTA_NEXT(attr, attrlen);
 367         }
 368
 369         return 0;
 370 }
 371
 372
 373 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 374                                           int ifindex, u8 *buf, size_t len)
 375 {
 376         if (drv->ifindex == ifindex)
 377                 return 1;
 378
 379         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 380                 drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
 381                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 382                            "interface");
 383                 wpa_driver_nl80211_finish_drv_init(drv);
 384                 return 1;
 385         }
 386
 387         return 0;
 388 }
 389
 390
 391 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 392                                                  struct ifinfomsg *ifi,
 393                                                  u8 *buf, size_t len)
 394 {
 395         struct wpa_driver_nl80211_data *drv = ctx;
 396         int attrlen, rta_len;
 397         struct rtattr *attr;
 398         u32 brid = 0;
 399
 400         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len) &&
 401             !have_ifidx(drv, ifi->ifi_index)) {
 402                 wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
 403                            "ifindex %d", ifi->ifi_index);
 404                 return;
 405         }
 406
 407         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 408                    "(%s%s%s%s)",
 409                    drv->operstate, ifi->ifi_flags,
 410                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 411                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 412                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 413                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 414         /*
 415          * Some drivers send the association event before the operup event--in
 416          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 417          * fails. This will hit us when wpa_supplicant does not need to do
 418          * IEEE 802.1X authentication
 419          */
 420         if (drv->operstate == 1 &&
 421             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 422             !(ifi->ifi_flags & IFF_RUNNING))
 423                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 424                                        -1, IF_OPER_UP);
 425
 426         attrlen = len;
 427         attr = (struct rtattr *) buf;
 428         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 429         while (RTA_OK(attr, attrlen)) {
 430                 if (attr->rta_type == IFLA_IFNAME) {
 431                         wpa_driver_nl80211_event_link(
 432                                 drv,
 433                                 ((char *) attr) + rta_len,
 434                                 attr->rta_len - rta_len, 0);
 435                 } else if (attr->rta_type == IFLA_MASTER)
 436                         brid = nla_get_u32((struct nlattr *) attr);
 437                 attr = RTA_NEXT(attr, attrlen);
 438         }
 439
 440 #ifdef HOSTAPD
 441         if (ifi->ifi_family == AF_BRIDGE && brid) {
 442                 /* device has been added to bridge */
 443                 char namebuf[IFNAMSIZ];
 444                 if_indextoname(brid, namebuf);
 445                 wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
 446                            brid, namebuf);
 447                 add_ifidx(drv, brid);
 448         }
 449 #endif /* HOSTAPD */
 450 }
 451
 452
 453 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 454                                                  struct ifinfomsg *ifi,
 455                                                  u8 *buf, size_t len)
 456 {
 457         struct wpa_driver_nl80211_data *drv = ctx;
 458         int attrlen, rta_len;
 459         struct rtattr *attr;
 460         u32 brid = 0;
 461
 462         attrlen = len;
 463         attr = (struct rtattr *) buf;
 464
 465         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 466         while (RTA_OK(attr, attrlen)) {
 467                 if (attr->rta_type == IFLA_IFNAME) {
 468                         wpa_driver_nl80211_event_link(
 469                                 drv,
 470                                 ((char *) attr) + rta_len,
 471                                 attr->rta_len - rta_len, 1);
 472                 } else if (attr->rta_type == IFLA_MASTER)
 473                         brid = nla_get_u32((struct nlattr *) attr);
 474                 attr = RTA_NEXT(attr, attrlen);
 475         }
 476
 477 #ifdef HOSTAPD
 478         if (ifi->ifi_family == AF_BRIDGE && brid) {
 479                 /* device has been removed from bridge */
 480                 char namebuf[IFNAMSIZ];
 481                 if_indextoname(brid, namebuf);
 482                 wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
 483                            "%s", brid, namebuf);
 484                 del_ifidx(drv, brid);
 485         }
 486 #endif /* HOSTAPD */
 487 }
 488
 489
 490 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 491                             const u8 *frame, size_t len)
 492 {
 493         const struct ieee80211_mgmt *mgmt;
 494         union wpa_event_data event;
 495
 496         mgmt = (const struct ieee80211_mgmt *) frame;
 497         if (len < 24 + sizeof(mgmt->u.auth)) {
 498                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 499                            "frame");
 500                 return;
 501         }
 502
 503         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 504         os_memset(&event, 0, sizeof(event));
 505         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 506         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 507         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 508         if (len > 24 + sizeof(mgmt->u.auth)) {
 509                 event.auth.ies = mgmt->u.auth.variable;
 510                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 511         }
 512
 513         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 514 }
 515
 516
 517 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 518                             const u8 *frame, size_t len)
 519 {
 520         const struct ieee80211_mgmt *mgmt;
 521         union wpa_event_data event;
 522         u16 status;
 523
 524         mgmt = (const struct ieee80211_mgmt *) frame;
 525         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 526                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 527                            "frame");
 528                 return;
 529         }
 530
 531         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 532         if (status != WLAN_STATUS_SUCCESS) {
 533                 os_memset(&event, 0, sizeof(event));
 534                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 535                         event.assoc_reject.resp_ies =
 536                                 (u8 *) mgmt->u.assoc_resp.variable;
 537                         event.assoc_reject.resp_ies_len =
 538                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 539                 }
 540                 event.assoc_reject.status_code = status;
 541
 542                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 543                 return;
 544         }
 545
 546         drv->associated = 1;
 547         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 548
 549         os_memset(&event, 0, sizeof(event));
 550         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 551                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 552                 event.assoc_info.resp_ies_len =
 553                         len - 24 - sizeof(mgmt->u.assoc_resp);
 554         }
 555
 556         event.assoc_info.freq = drv->assoc_freq;
 557
 558         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 559 }
 560
 561
 562 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 563                                enum nl80211_commands cmd, struct nlattr *status,
 564                                struct nlattr *addr, struct nlattr *req_ie,
 565                                struct nlattr *resp_ie)
 566 {
 567         union wpa_event_data event;
 568
 569         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 570                 /*
 571                  * Avoid reporting two association events that would confuse
 572                  * the core code.
 573                  */
 574                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 575                            "when using userspace SME", cmd);
 576                 return;
 577         }
 578
 579         os_memset(&event, 0, sizeof(event));
 580         if (cmd == NL80211_CMD_CONNECT &&
 581             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 582                 if (resp_ie) {
 583                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 584                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 585                 }
 586                 event.assoc_reject.status_code = nla_get_u16(status);
 587                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 588                 return;
 589         }
 590
 591         drv->associated = 1;
 592         if (addr)
 593                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 594
 595         if (req_ie) {
 596                 event.assoc_info.req_ies = nla_data(req_ie);
 597                 event.assoc_info.req_ies_len = nla_len(req_ie);
 598         }
 599         if (resp_ie) {
 600                 event.assoc_info.resp_ies = nla_data(resp_ie);
 601                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 602         }
 603
 604         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 605 }
 606
 607
 608 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 609                                enum nl80211_commands cmd, struct nlattr *addr)
 610 {
 611         union wpa_event_data event;
 612         enum wpa_event_type ev;
 613
 614         if (nla_len(addr) != ETH_ALEN)
 615                 return;
 616
 617         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 618                    cmd, MAC2STR((u8 *) nla_data(addr)));
 619
 620         if (cmd == NL80211_CMD_AUTHENTICATE)
 621                 ev = EVENT_AUTH_TIMED_OUT;
 622         else if (cmd == NL80211_CMD_ASSOCIATE)
 623                 ev = EVENT_ASSOC_TIMED_OUT;
 624         else
 625                 return;
 626
 627         os_memset(&event, 0, sizeof(event));
 628         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 629         wpa_supplicant_event(drv->ctx, ev, &event);
 630 }
 631
 632
 633 static void mlme_event_action(struct wpa_driver_nl80211_data *drv,
 634                               struct nlattr *freq, const u8 *frame, size_t len)
 635 {
 636         const struct ieee80211_mgmt *mgmt;
 637         union wpa_event_data event;
 638         u16 fc, stype;
 639
 640         mgmt = (const struct ieee80211_mgmt *) frame;
 641         if (len < 24) {
 642                 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
 643                 return;
 644         }
 645
 646         fc = le_to_host16(mgmt->frame_control);
 647         stype = WLAN_FC_GET_STYPE(fc);
 648
 649         os_memset(&event, 0, sizeof(event));
 650         event.rx_action.da = mgmt->da;
 651         event.rx_action.sa = mgmt->sa;
 652         event.rx_action.bssid = mgmt->bssid;
 653         event.rx_action.category = mgmt->u.action.category;
 654         event.rx_action.data = &mgmt->u.action.category + 1;
 655         event.rx_action.len = frame + len - event.rx_action.data;
 656         if (freq)
 657                 event.rx_action.freq = nla_get_u32(freq);
 658         wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
 659 }
 660
 661
 662 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
 663                                         struct nlattr *cookie, const u8 *frame,
 664                                         size_t len, struct nlattr *ack)
 665 {
 666         union wpa_event_data event;
 667         const struct ieee80211_hdr *hdr;
 668         u16 fc;
 669         u64 cookie_val;
 670
 671         if (!cookie)
 672                 return;
 673
 674         cookie_val = nla_get_u64(cookie);
 675         wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s",
 676                    (long long unsigned int) cookie_val,
 677                    cookie_val == drv->send_action_cookie ?
 678                    " (match)" : " (unknown)");
 679         if (cookie_val != drv->send_action_cookie)
 680                 return;
 681
 682         hdr = (const struct ieee80211_hdr *) frame;
 683         fc = le_to_host16(hdr->frame_control);
 684
 685         os_memset(&event, 0, sizeof(event));
 686         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
 687         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
 688         event.tx_status.dst = hdr->addr1;
 689         event.tx_status.data = frame;
 690         event.tx_status.data_len = len;
 691         event.tx_status.ack = ack != NULL;
 692         wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
 693 }
 694
 695
 696 static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
 697                                        enum wpa_event_type type,
 698                                        const u8 *frame, size_t len)
 699 {
 700         const struct ieee80211_mgmt *mgmt;
 701         union wpa_event_data event;
 702         const u8 *bssid = NULL;
 703         u16 reason_code = 0;
 704
 705         drv->associated = 0;
 706         os_memset(&event, 0, sizeof(event));
 707
 708         mgmt = (const struct ieee80211_mgmt *) frame;
 709         if (len >= 24)
 710                 bssid = mgmt->bssid;
 711         /* Note: Same offset for Reason Code in both frame subtypes */
 712         if (len >= 24 + sizeof(mgmt->u.deauth))
 713                 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
 714
 715         if (type == EVENT_DISASSOC) {
 716                 event.disassoc_info.addr = bssid;
 717                 event.disassoc_info.reason_code = reason_code;
 718         } else {
 719                 event.deauth_info.addr = bssid;
 720                 event.deauth_info.reason_code = reason_code;
 721         }
 722
 723         wpa_supplicant_event(drv->ctx, type, &event);
 724 }
 725
 726
 727 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 728                        enum nl80211_commands cmd, struct nlattr *frame,
 729                        struct nlattr *addr, struct nlattr *timed_out,
 730                        struct nlattr *freq, struct nlattr *ack,
 731                        struct nlattr *cookie)
 732 {
 733         if (timed_out && addr) {
 734                 mlme_timeout_event(drv, cmd, addr);
 735                 return;
 736         }
 737
 738         if (frame == NULL) {
 739                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 740                            "data", cmd);
 741                 return;
 742         }
 743
 744         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 745         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 746                     nla_data(frame), nla_len(frame));
 747
 748         switch (cmd) {
 749         case NL80211_CMD_AUTHENTICATE:
 750                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 751                 break;
 752         case NL80211_CMD_ASSOCIATE:
 753                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 754                 break;
 755         case NL80211_CMD_DEAUTHENTICATE:
 756                 mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
 757                                            nla_data(frame), nla_len(frame));
 758                 break;
 759         case NL80211_CMD_DISASSOCIATE:
 760                 mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
 761                                            nla_data(frame), nla_len(frame));
 762                 break;
 763         case NL80211_CMD_ACTION:
 764                 mlme_event_action(drv, freq, nla_data(frame), nla_len(frame));
 765                 break;
 766         case NL80211_CMD_ACTION_TX_STATUS:
 767                 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
 768                                             nla_len(frame), ack);
 769                 break;
 770         default:
 771                 break;
 772         }
 773 }
 774
 775
 776 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 777                                            struct nlattr *tb[])
 778 {
 779         union wpa_event_data data;
 780
 781         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 782         os_memset(&data, 0, sizeof(data));
 783         if (tb[NL80211_ATTR_MAC]) {
 784                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 785                             nla_data(tb[NL80211_ATTR_MAC]),
 786                             nla_len(tb[NL80211_ATTR_MAC]));
 787                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 788         }
 789         if (tb[NL80211_ATTR_KEY_SEQ]) {
 790                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 791                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 792                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 793         }
 794         if (tb[NL80211_ATTR_KEY_TYPE]) {
 795                 enum nl80211_key_type key_type =
 796                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 797                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 798                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 799                         data.michael_mic_failure.unicast = 1;
 800         } else
 801                 data.michael_mic_failure.unicast = 1;
 802
 803         if (tb[NL80211_ATTR_KEY_IDX]) {
 804                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 805                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 806         }
 807
 808         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 809 }
 810
 811
 812 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 813                                  struct nlattr *tb[])
 814 {
 815         if (tb[NL80211_ATTR_MAC] == NULL) {
 816                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 817                            "event");
 818                 return;
 819         }
 820         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 821         drv->associated = 1;
 822         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 823                    MAC2STR(drv->bssid));
 824
 825         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 826 }
 827
 828
 829 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
 830                                          int cancel_event, struct nlattr *tb[])
 831 {
 832         unsigned int freq, chan_type, duration;
 833         union wpa_event_data data;
 834         u64 cookie;
 835
 836         if (tb[NL80211_ATTR_WIPHY_FREQ])
 837                 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 838         else
 839                 freq = 0;
 840
 841         if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
 842                 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 843         else
 844                 chan_type = 0;
 845
 846         if (tb[NL80211_ATTR_DURATION])
 847                 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
 848         else
 849                 duration = 0;
 850
 851         if (tb[NL80211_ATTR_COOKIE])
 852                 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
 853         else
 854                 cookie = 0;
 855
 856         wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
 857                    "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
 858                    cancel_event, freq, chan_type, duration,
 859                    (long long unsigned int) cookie,
 860                    cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
 861
 862         if (cookie != drv->remain_on_chan_cookie)
 863                 return; /* not for us */
 864
 865         drv->pending_remain_on_chan = !cancel_event;
 866
 867         os_memset(&data, 0, sizeof(data));
 868         data.remain_on_channel.freq = freq;
 869         data.remain_on_channel.duration = duration;
 870         wpa_supplicant_event(drv->ctx, cancel_event ?
 871                              EVENT_CANCEL_REMAIN_ON_CHANNEL :
 872                              EVENT_REMAIN_ON_CHANNEL, &data);
 873 }
 874
 875
 876 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 877                             struct nlattr *tb[])
 878 {
 879         union wpa_event_data event;
 880         struct nlattr *nl;
 881         int rem;
 882         struct scan_info *info;
 883 #define MAX_REPORT_FREQS 50
 884         int freqs[MAX_REPORT_FREQS];
 885         int num_freqs = 0;
 886
 887         os_memset(&event, 0, sizeof(event));
 888         info = &event.scan_info;
 889         info->aborted = aborted;
 890
 891         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 892                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
 893                         struct wpa_driver_scan_ssid *s =
 894                                 &info->ssids[info->num_ssids];
 895                         s->ssid = nla_data(nl);
 896                         s->ssid_len = nla_len(nl);
 897                         info->num_ssids++;
 898                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
 899                                 break;
 900                 }
 901         }
 902         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 903                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
 904                 {
 905                         freqs[num_freqs] = nla_get_u32(nl);
 906                         num_freqs++;
 907                         if (num_freqs == MAX_REPORT_FREQS - 1)
 908                                 break;
 909                 }
 910                 info->freqs = freqs;
 911                 info->num_freqs = num_freqs;
 912         }
 913         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
 914 }
 915
 916
 917 static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
 918                               struct nlattr *tb[])
 919 {
 920         static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
 921                 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
 922                 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
 923                 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
 924         };
 925         struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
 926         enum nl80211_cqm_rssi_threshold_event event;
 927         union wpa_event_data ed;
 928
 929         if (tb[NL80211_ATTR_CQM] == NULL ||
 930             nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
 931                              cqm_policy)) {
 932                 wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
 933                 return;
 934         }
 935
 936         if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
 937                 return;
 938         event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
 939
 940         os_memset(&ed, 0, sizeof(ed));
 941
 942         if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
 943                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
 944                            "event: RSSI high");
 945                 ed.signal_change.above_threshold = 1;
 946         } else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
 947                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
 948                            "event: RSSI low");
 949                 ed.signal_change.above_threshold = 0;
 950         } else
 951                 return;
 952
 953         wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
 954 }
 955
 956
 957 static int process_event(struct nl_msg *msg, void *arg)
 958 {
 959         struct wpa_driver_nl80211_data *drv = arg;
 960         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 961         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 962         union wpa_event_data data;
 963
 964         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 965                   genlmsg_attrlen(gnlh, 0), NULL);
 966
 967         if (tb[NL80211_ATTR_IFINDEX]) {
 968                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 969                 if (ifindex != drv->ifindex && !have_ifidx(drv, ifindex)) {
 970                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 971                                    " for foreign interface (ifindex %d)",
 972                                    gnlh->cmd, ifindex);
 973                         return NL_SKIP;
 974                 }
 975         }
 976
 977         if (drv->ap_scan_as_station &&
 978             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 979              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 980                 wpa_driver_nl80211_set_mode(&drv->first_bss,
 981                                             IEEE80211_MODE_AP);
 982                 drv->ap_scan_as_station = 0;
 983         }
 984
 985         switch (gnlh->cmd) {
 986         case NL80211_CMD_TRIGGER_SCAN:
 987                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 988                 break;
 989         case NL80211_CMD_NEW_SCAN_RESULTS:
 990                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 991                 drv->scan_complete_events = 1;
 992                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 993                                      drv->ctx);
 994                 send_scan_event(drv, 0, tb);
 995                 break;
 996         case NL80211_CMD_SCAN_ABORTED:
 997                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 998                 /*
 999                  * Need to indicate that scan results are available in order
1000                  * not to make wpa_supplicant stop its scanning.
1001                  */
1002                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1003                                      drv->ctx);
1004                 send_scan_event(drv, 1, tb);
1005                 break;
1006         case NL80211_CMD_AUTHENTICATE:
1007         case NL80211_CMD_ASSOCIATE:
1008         case NL80211_CMD_DEAUTHENTICATE:
1009         case NL80211_CMD_DISASSOCIATE:
1010         case NL80211_CMD_ACTION:
1011         case NL80211_CMD_ACTION_TX_STATUS:
1012                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
1013                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
1014                            tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
1015                            tb[NL80211_ATTR_COOKIE]);
1016                 break;
1017         case NL80211_CMD_CONNECT:
1018         case NL80211_CMD_ROAM:
1019                 mlme_event_connect(drv, gnlh->cmd,
1020                                    tb[NL80211_ATTR_STATUS_CODE],
1021                                    tb[NL80211_ATTR_MAC],
1022                                    tb[NL80211_ATTR_REQ_IE],
1023                                    tb[NL80211_ATTR_RESP_IE]);
1024                 break;
1025         case NL80211_CMD_DISCONNECT:
1026                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1027                         /*
1028                          * Avoid reporting two disassociation events that could
1029                          * confuse the core code.
1030                          */
1031                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
1032                                    "event when using userspace SME");
1033                         break;
1034                 }
1035                 drv->associated = 0;
1036                 os_memset(&data, 0, sizeof(data));
1037                 if (tb[NL80211_ATTR_REASON_CODE])
1038                         data.disassoc_info.reason_code =
1039                                 nla_get_u16(tb[NL80211_ATTR_REASON_CODE]);
1040                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, &data);
1041                 break;
1042         case NL80211_CMD_MICHAEL_MIC_FAILURE:
1043                 mlme_event_michael_mic_failure(drv, tb);
1044                 break;
1045         case NL80211_CMD_JOIN_IBSS:
1046                 mlme_event_join_ibss(drv, tb);
1047                 break;
1048         case NL80211_CMD_REMAIN_ON_CHANNEL:
1049                 mlme_event_remain_on_channel(drv, 0, tb);
1050                 break;
1051         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
1052                 mlme_event_remain_on_channel(drv, 1, tb);
1053                 break;
1054         case NL80211_CMD_NOTIFY_CQM:
1055                 nl80211_cqm_event(drv, tb);
1056                 break;
1057         default:
1058                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1059                            "(cmd=%d)", gnlh->cmd);
1060                 break;
1061         }
1062
1063         return NL_SKIP;
1064 }
1065
1066
1067 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1068                                              void *sock_ctx)
1069 {
1070         struct nl_cb *cb;
1071         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1072
1073         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1074
1075         cb = nl_cb_clone(drv->nl_cb);
1076         if (!cb)
1077                 return;
1078         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1079         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1080         nl_recvmsgs(drv->nl_handle_event, cb);
1081         nl_cb_put(cb);
1082 }
1083
1084
1085 /**
1086  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1087  * @priv: driver_nl80211 private data
1088  * @alpha2_arg: country to which to switch to
1089  * Returns: 0 on success, -1 on failure
1090  *
1091  * This asks nl80211 to set the regulatory domain for given
1092  * country ISO / IEC alpha2.
1093  */
1094 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1095 {
1096         struct i802_bss *bss = priv;
1097         struct wpa_driver_nl80211_data *drv = bss->drv;
1098         char alpha2[3];
1099         struct nl_msg *msg;
1100
1101         msg = nlmsg_alloc();
1102         if (!msg)
1103                 return -ENOMEM;
1104
1105         alpha2[0] = alpha2_arg[0];
1106         alpha2[1] = alpha2_arg[1];
1107         alpha2[2] = '\0';
1108
1109         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1110                     0, NL80211_CMD_REQ_SET_REG, 0);
1111
1112         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1113         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1114                 return -EINVAL;
1115         return 0;
1116 nla_put_failure:
1117         return -EINVAL;
1118 }
1119
1120
1121 #ifndef HOSTAPD
1122 struct wiphy_info_data {
1123         int max_scan_ssids;
1124         int ap_supported;
1125         int auth_supported;
1126         int connect_supported;
1127 };
1128
1129
1130 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1131 {
1132         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1133         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1134         struct wiphy_info_data *info = arg;
1135
1136         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1137                   genlmsg_attrlen(gnlh, 0), NULL);
1138
1139         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1140                 info->max_scan_ssids =
1141                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1142
1143         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1144                 struct nlattr *nl_mode;
1145                 int i;
1146                 nla_for_each_nested(nl_mode,
1147                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1148                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1149                                 info->ap_supported = 1;
1150                                 break;
1151                         }
1152                 }
1153         }
1154
1155         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1156                 struct nlattr *nl_cmd;
1157                 int i;
1158
1159                 nla_for_each_nested(nl_cmd,
1160                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1161                         u32 cmd = nla_get_u32(nl_cmd);
1162                         if (cmd == NL80211_CMD_AUTHENTICATE)
1163                                 info->auth_supported = 1;
1164                         else if (cmd == NL80211_CMD_CONNECT)
1165                                 info->connect_supported = 1;
1166                 }
1167         }
1168
1169         return NL_SKIP;
1170 }
1171
1172
1173 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1174                                        struct wiphy_info_data *info)
1175 {
1176         struct nl_msg *msg;
1177
1178         os_memset(info, 0, sizeof(*info));
1179         msg = nlmsg_alloc();
1180         if (!msg)
1181                 return -1;
1182
1183         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1184                     0, NL80211_CMD_GET_WIPHY, 0);
1185
1186         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1187
1188         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1189                 return 0;
1190         msg = NULL;
1191 nla_put_failure:
1192         nlmsg_free(msg);
1193         return -1;
1194 }
1195
1196
1197 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1198 {
1199         struct wiphy_info_data info;
1200         if (wpa_driver_nl80211_get_info(drv, &info))
1201                 return -1;
1202         drv->has_capability = 1;
1203         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1204         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1205                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1206                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1207                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1208         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1209                 WPA_DRIVER_CAPA_ENC_WEP104 |
1210                 WPA_DRIVER_CAPA_ENC_TKIP |
1211                 WPA_DRIVER_CAPA_ENC_CCMP;
1212         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1213                 WPA_DRIVER_AUTH_SHARED |
1214                 WPA_DRIVER_AUTH_LEAP;
1215
1216         drv->capa.max_scan_ssids = info.max_scan_ssids;
1217         if (info.ap_supported)
1218                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1219
1220         if (info.auth_supported)
1221                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1222         else if (!info.connect_supported) {
1223                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1224                            "authentication/association or connect commands");
1225                 return -1;
1226         }
1227
1228         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1229         drv->capa.max_remain_on_chan = 5000;
1230
1231         return 0;
1232 }
1233 #endif /* HOSTAPD */
1234
1235
1236 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1237                                       void *ctx)
1238 {
1239         int ret;
1240
1241         /* Initialize generic netlink and nl80211 */
1242
1243         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1244         if (drv->nl_cb == NULL) {
1245                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1246                            "callbacks");
1247                 goto err1;
1248         }
1249
1250         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1251         if (drv->nl_handle == NULL) {
1252                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1253                            "callbacks");
1254                 goto err2;
1255         }
1256
1257         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1258         if (drv->nl_handle_event == NULL) {
1259                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1260                            "callbacks (event)");
1261                 goto err2b;
1262         }
1263
1264         if (genl_connect(drv->nl_handle)) {
1265                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1266                            "netlink");
1267                 goto err3;
1268         }
1269
1270         if (genl_connect(drv->nl_handle_event)) {
1271                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1272                            "netlink (event)");
1273                 goto err3;
1274         }
1275
1276 #ifdef CONFIG_LIBNL20
1277         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1278                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1279                            "netlink cache");
1280                 goto err3;
1281         }
1282         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1283             0) {
1284                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1285                            "netlink cache (event)");
1286                 goto err3b;
1287         }
1288 #else /* CONFIG_LIBNL20 */
1289         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1290         if (drv->nl_cache == NULL) {
1291                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1292                            "netlink cache");
1293                 goto err3;
1294         }
1295         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1296         if (drv->nl_cache_event == NULL) {
1297                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1298                            "netlink cache (event)");
1299                 goto err3b;
1300         }
1301 #endif /* CONFIG_LIBNL20 */
1302
1303         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1304         if (drv->nl80211 == NULL) {
1305                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1306                            "found");
1307                 goto err4;
1308         }
1309
1310         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1311         if (ret >= 0)
1312                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1313         if (ret < 0) {
1314                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1315                            "membership for scan events: %d (%s)",
1316                            ret, strerror(-ret));
1317                 goto err4;
1318         }
1319
1320         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1321         if (ret >= 0)
1322                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1323         if (ret < 0) {
1324                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1325                            "membership for mlme events: %d (%s)",
1326                            ret, strerror(-ret));
1327                 goto err4;
1328         }
1329
1330         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1331                                  wpa_driver_nl80211_event_receive, drv, ctx);
1332
1333         return 0;
1334
1335 err4:
1336         nl_cache_free(drv->nl_cache_event);
1337 err3b:
1338         nl_cache_free(drv->nl_cache);
1339 err3:
1340         nl_handle_destroy(drv->nl_handle_event);
1341 err2b:
1342         nl_handle_destroy(drv->nl_handle);
1343 err2:
1344         nl_cb_put(drv->nl_cb);
1345 err1:
1346         return -1;
1347 }
1348
1349
1350 /**
1351  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1352  * @ctx: context to be used when calling wpa_supplicant functions,
1353  * e.g., wpa_supplicant_event()
1354  * @ifname: interface name, e.g., wlan0
1355  * Returns: Pointer to private data, %NULL on failure
1356  */
1357 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1358 {
1359         struct wpa_driver_nl80211_data *drv;
1360         struct netlink_config *cfg;
1361         struct i802_bss *bss;
1362
1363         drv = os_zalloc(sizeof(*drv));
1364         if (drv == NULL)
1365                 return NULL;
1366         drv->ctx = ctx;
1367         bss = &drv->first_bss;
1368         bss->drv = drv;
1369         os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
1370         drv->monitor_ifidx = -1;
1371         drv->monitor_sock = -1;
1372         drv->ioctl_sock = -1;
1373
1374         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1375                 os_free(drv);
1376                 return NULL;
1377         }
1378
1379         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1380         if (drv->ioctl_sock < 0) {
1381                 perror("socket(PF_INET,SOCK_DGRAM)");
1382                 goto failed;
1383         }
1384
1385         cfg = os_zalloc(sizeof(*cfg));
1386         if (cfg == NULL)
1387                 goto failed;
1388         cfg->ctx = drv;
1389         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1390         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1391         drv->netlink = netlink_init(cfg);
1392         if (drv->netlink == NULL) {
1393                 os_free(cfg);
1394                 goto failed;
1395         }
1396         if (wpa_driver_nl80211_finish_drv_init(drv))
1397                 goto failed;
1398
1399         return bss;
1400
1401 failed:
1402         netlink_deinit(drv->netlink);
1403         if (drv->ioctl_sock >= 0)
1404                 close(drv->ioctl_sock);
1405
1406         genl_family_put(drv->nl80211);
1407         nl_cache_free(drv->nl_cache);
1408         nl_handle_destroy(drv->nl_handle);
1409         nl_cb_put(drv->nl_cb);
1410         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1411
1412         os_free(drv);
1413         return NULL;
1414 }
1415
1416
1417 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1418                                          const u8 *match, size_t match_len)
1419 {
1420         struct nl_msg *msg;
1421         int ret = -1;
1422
1423         msg = nlmsg_alloc();
1424         if (!msg)
1425                 return -1;
1426
1427         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1428                     NL80211_CMD_REGISTER_ACTION, 0);
1429
1430         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1431         NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1432
1433         ret = send_and_recv(drv, drv->nl_handle_event, msg, NULL, NULL);
1434         msg = NULL;
1435         if (ret) {
1436                 wpa_printf(MSG_DEBUG, "nl80211: Register Action command "
1437                            "failed: ret=%d (%s)", ret, strerror(-ret));
1438                 wpa_hexdump(MSG_DEBUG, "nl80211: Register Action match",
1439                             match, match_len);
1440                 goto nla_put_failure;
1441         }
1442         ret = 0;
1443 nla_put_failure:
1444         nlmsg_free(msg);
1445         return ret;
1446 }
1447
1448
1449 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1450 {
1451         /* FT Action frames */
1452         if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
1453                 return -1;
1454         else
1455                 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
1456                         WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
1457
1458         return 0;
1459 }
1460
1461
1462 static int
1463 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1464 {
1465         struct i802_bss *bss = &drv->first_bss;
1466
1467         drv->ifindex = if_nametoindex(bss->ifname);
1468         drv->first_bss.ifindex = drv->ifindex;
1469
1470 #ifndef HOSTAPD
1471         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
1472                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1473                            "use managed mode");
1474         }
1475
1476         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
1477                 wpa_printf(MSG_ERROR, "Could not set interface '%s' UP",
1478                            bss->ifname);
1479                 return -1;
1480         }
1481
1482         if (wpa_driver_nl80211_capa(drv))
1483                 return -1;
1484
1485         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1486                                1, IF_OPER_DORMANT);
1487 #endif /* HOSTAPD */
1488
1489         if (nl80211_register_action_frames(drv) < 0) {
1490                 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
1491                            "frame processing - ignore for now");
1492                 /*
1493                  * Older kernel versions did not support this, so ignore the
1494                  * error for now. Some functionality may not be available
1495                  * because of this.
1496                  */
1497         }
1498
1499         return 0;
1500 }
1501
1502
1503 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1504 {
1505         struct nl_msg *msg;
1506
1507         msg = nlmsg_alloc();
1508         if (!msg)
1509                 return -ENOMEM;
1510
1511         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1512                     0, NL80211_CMD_DEL_BEACON, 0);
1513         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1514
1515         return send_and_recv_msgs(drv, msg, NULL, NULL);
1516  nla_put_failure:
1517         return -ENOBUFS;
1518 }
1519
1520
1521 /**
1522  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1523  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1524  *
1525  * Shut down driver interface and processing of driver events. Free
1526  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1527  */
1528 static void wpa_driver_nl80211_deinit(void *priv)
1529 {
1530         struct i802_bss *bss = priv;
1531         struct wpa_driver_nl80211_data *drv = bss->drv;
1532
1533         if (drv->added_if_into_bridge) {
1534                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
1535                     < 0)
1536                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1537                                    "interface %s from bridge %s: %s",
1538                                    bss->ifname, drv->brname, strerror(errno));
1539         }
1540         if (drv->added_bridge) {
1541                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1542                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1543                                    "bridge %s: %s",
1544                                    drv->brname, strerror(errno));
1545         }
1546
1547         nl80211_remove_monitor_interface(drv);
1548
1549         if (drv->nlmode == NL80211_IFTYPE_AP)
1550                 wpa_driver_nl80211_del_beacon(drv);
1551
1552 #ifdef HOSTAPD
1553         if (drv->last_freq_ht) {
1554                 /* Clear HT flags from the driver */
1555                 struct hostapd_freq_params freq;
1556                 os_memset(&freq, 0, sizeof(freq));
1557                 freq.freq = drv->last_freq;
1558                 i802_set_freq(priv, &freq);
1559         }
1560
1561         if (drv->eapol_sock >= 0) {
1562                 eloop_unregister_read_sock(drv->eapol_sock);
1563                 close(drv->eapol_sock);
1564         }
1565
1566         if (drv->if_indices != drv->default_if_indices)
1567                 os_free(drv->if_indices);
1568 #endif /* HOSTAPD */
1569
1570         if (drv->disable_11b_rates)
1571                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1572
1573         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1574         netlink_deinit(drv->netlink);
1575
1576         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1577
1578         (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
1579         wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
1580
1581         if (drv->ioctl_sock >= 0)
1582                 close(drv->ioctl_sock);
1583
1584         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1585         genl_family_put(drv->nl80211);
1586         nl_cache_free(drv->nl_cache);
1587         nl_cache_free(drv->nl_cache_event);
1588         nl_handle_destroy(drv->nl_handle);
1589         nl_handle_destroy(drv->nl_handle_event);
1590         nl_cb_put(drv->nl_cb);
1591
1592         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1593                              drv, NULL);
1594
1595         os_free(drv->filter_ssids);
1596
1597         os_free(drv);
1598 }
1599
1600
1601 /**
1602  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1603  * @eloop_ctx: Driver private data
1604  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1605  *
1606  * This function can be used as registered timeout when starting a scan to
1607  * generate a scan completed event if the driver does not report this.
1608  */
1609 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1610 {
1611         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1612         if (drv->ap_scan_as_station) {
1613                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1614                                             IEEE80211_MODE_AP);
1615                 drv->ap_scan_as_station = 0;
1616         }
1617         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1618         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1619 }
1620
1621
1622 /**
1623  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1624  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1625  * @params: Scan parameters
1626  * Returns: 0 on success, -1 on failure
1627  */
1628 static int wpa_driver_nl80211_scan(void *priv,
1629                                    struct wpa_driver_scan_params *params)
1630 {
1631         struct i802_bss *bss = priv;
1632         struct wpa_driver_nl80211_data *drv = bss->drv;
1633         int ret = 0, timeout;
1634         struct nl_msg *msg, *ssids, *freqs;
1635         size_t i;
1636
1637         msg = nlmsg_alloc();
1638         ssids = nlmsg_alloc();
1639         freqs = nlmsg_alloc();
1640         if (!msg || !ssids || !freqs) {
1641                 nlmsg_free(msg);
1642                 nlmsg_free(ssids);
1643                 nlmsg_free(freqs);
1644                 return -1;
1645         }
1646
1647         os_free(drv->filter_ssids);
1648         drv->filter_ssids = params->filter_ssids;
1649         params->filter_ssids = NULL;
1650         drv->num_filter_ssids = params->num_filter_ssids;
1651
1652         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1653                     NL80211_CMD_TRIGGER_SCAN, 0);
1654
1655         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1656
1657         for (i = 0; i < params->num_ssids; i++) {
1658                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
1659                                   params->ssids[i].ssid,
1660                                   params->ssids[i].ssid_len);
1661                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1662                         params->ssids[i].ssid);
1663         }
1664         if (params->num_ssids)
1665                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1666
1667         if (params->extra_ies) {
1668                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
1669                                   params->extra_ies, params->extra_ies_len);
1670                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1671                         params->extra_ies);
1672         }
1673
1674         if (params->freqs) {
1675                 for (i = 0; params->freqs[i]; i++) {
1676                         wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
1677                                    "MHz", params->freqs[i]);
1678                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1679                 }
1680                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1681         }
1682
1683         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1684         msg = NULL;
1685         if (ret) {
1686                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1687                            "(%s)", ret, strerror(-ret));
1688 #ifdef HOSTAPD
1689                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1690                         /*
1691                          * mac80211 does not allow scan requests in AP mode, so
1692                          * try to do this in station mode.
1693                          */
1694                         if (wpa_driver_nl80211_set_mode(bss,
1695                                                         IEEE80211_MODE_INFRA))
1696                                 goto nla_put_failure;
1697
1698                         if (wpa_driver_nl80211_scan(drv, params)) {
1699                                 wpa_driver_nl80211_set_mode(bss,
1700                                                             IEEE80211_MODE_AP);
1701                                 goto nla_put_failure;
1702                         }
1703
1704                         /* Restore AP mode when processing scan results */
1705                         drv->ap_scan_as_station = 1;
1706                         ret = 0;
1707                 } else
1708                         goto nla_put_failure;
1709 #else /* HOSTAPD */
1710                 goto nla_put_failure;
1711 #endif /* HOSTAPD */
1712         }
1713
1714         /* Not all drivers generate "scan completed" wireless event, so try to
1715          * read results after a timeout. */
1716         timeout = 10;
1717         if (drv->scan_complete_events) {
1718                 /*
1719                  * The driver seems to deliver events to notify when scan is
1720                  * complete, so use longer timeout to avoid race conditions
1721                  * with scanning and following association request.
1722                  */
1723                 timeout = 30;
1724         }
1725         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1726                    "seconds", ret, timeout);
1727         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1728         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1729                                drv, drv->ctx);
1730
1731 nla_put_failure:
1732         nlmsg_free(ssids);
1733         nlmsg_free(msg);
1734         nlmsg_free(freqs);
1735         return ret;
1736 }
1737
1738
1739 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
1740 {
1741         const u8 *end, *pos;
1742
1743         if (ies == NULL)
1744                 return NULL;
1745
1746         pos = ies;
1747         end = ies + ies_len;
1748
1749         while (pos + 1 < end) {
1750                 if (pos + 2 + pos[1] > end)
1751                         break;
1752                 if (pos[0] == ie)
1753                         return pos;
1754                 pos += 2 + pos[1];
1755         }
1756
1757         return NULL;
1758 }
1759
1760
1761 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
1762                                  const u8 *ie, size_t ie_len)
1763 {
1764         const u8 *ssid;
1765         size_t i;
1766
1767         if (drv->filter_ssids == NULL)
1768                 return 0;
1769
1770         ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
1771         if (ssid == NULL)
1772                 return 1;
1773
1774         for (i = 0; i < drv->num_filter_ssids; i++) {
1775                 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
1776                     os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
1777                     0)
1778                         return 0;
1779         }
1780
1781         return 1;
1782 }
1783
1784
1785 struct nl80211_bss_info_arg {
1786         struct wpa_driver_nl80211_data *drv;
1787         struct wpa_scan_results *res;
1788 };
1789
1790 static int bss_info_handler(struct nl_msg *msg, void *arg)
1791 {
1792         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1793         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1794         struct nlattr *bss[NL80211_BSS_MAX + 1];
1795         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1796                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1797                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1798                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1799                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1800                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1801                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1802                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1803                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1804                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1805                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1806                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
1807         };
1808         struct nl80211_bss_info_arg *_arg = arg;
1809         struct wpa_scan_results *res = _arg->res;
1810         struct wpa_scan_res **tmp;
1811         struct wpa_scan_res *r;
1812         const u8 *ie, *beacon_ie;
1813         size_t ie_len, beacon_ie_len;
1814         u8 *pos;
1815
1816         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1817                   genlmsg_attrlen(gnlh, 0), NULL);
1818         if (!tb[NL80211_ATTR_BSS])
1819                 return NL_SKIP;
1820         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1821                              bss_policy))
1822                 return NL_SKIP;
1823         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1824                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1825                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1826         } else {
1827                 ie = NULL;
1828                 ie_len = 0;
1829         }
1830         if (bss[NL80211_BSS_BEACON_IES]) {
1831                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
1832                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
1833         } else {
1834                 beacon_ie = NULL;
1835                 beacon_ie_len = 0;
1836         }
1837
1838         if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
1839                                   ie ? ie_len : beacon_ie_len))
1840                 return NL_SKIP;
1841
1842         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
1843         if (r == NULL)
1844                 return NL_SKIP;
1845         if (bss[NL80211_BSS_BSSID])
1846                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1847                           ETH_ALEN);
1848         if (bss[NL80211_BSS_FREQUENCY])
1849                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1850         if (bss[NL80211_BSS_BEACON_INTERVAL])
1851                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1852         if (bss[NL80211_BSS_CAPABILITY])
1853                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1854         r->flags |= WPA_SCAN_NOISE_INVALID;
1855         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1856                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1857                 r->level /= 100; /* mBm to dBm */
1858                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1859         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1860                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1861                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1862         } else
1863                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1864         if (bss[NL80211_BSS_TSF])
1865                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1866         if (bss[NL80211_BSS_SEEN_MS_AGO])
1867                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1868         r->ie_len = ie_len;
1869         pos = (u8 *) (r + 1);
1870         if (ie) {
1871                 os_memcpy(pos, ie, ie_len);
1872                 pos += ie_len;
1873         }
1874         r->beacon_ie_len = beacon_ie_len;
1875         if (beacon_ie)
1876                 os_memcpy(pos, beacon_ie, beacon_ie_len);
1877
1878         if (bss[NL80211_BSS_STATUS]) {
1879                 enum nl80211_bss_status status;
1880                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1881                 switch (status) {
1882                 case NL80211_BSS_STATUS_AUTHENTICATED:
1883                         r->flags |= WPA_SCAN_AUTHENTICATED;
1884                         break;
1885                 case NL80211_BSS_STATUS_ASSOCIATED:
1886                         r->flags |= WPA_SCAN_ASSOCIATED;
1887                         break;
1888                 default:
1889                         break;
1890                 }
1891         }
1892
1893         tmp = os_realloc(res->res,
1894                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1895         if (tmp == NULL) {
1896                 os_free(r);
1897                 return NL_SKIP;
1898         }
1899         tmp[res->num++] = r;
1900         res->res = tmp;
1901
1902         return NL_SKIP;
1903 }
1904
1905
1906 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1907                                  const u8 *addr)
1908 {
1909         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1910                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1911                            "mismatch (" MACSTR ")", MAC2STR(addr));
1912                 wpa_driver_nl80211_mlme(drv, addr,
1913                                         NL80211_CMD_DEAUTHENTICATE,
1914                                         WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
1915         }
1916 }
1917
1918
1919 static void wpa_driver_nl80211_check_bss_status(
1920         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1921 {
1922         size_t i;
1923
1924         for (i = 0; i < res->num; i++) {
1925                 struct wpa_scan_res *r = res->res[i];
1926                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1927                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1928                                    "indicates BSS status with " MACSTR
1929                                    " as authenticated",
1930                                    MAC2STR(r->bssid));
1931                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1932                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1933                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1934                             0) {
1935                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1936                                            " in local state (auth=" MACSTR
1937                                            " assoc=" MACSTR ")",
1938                                            MAC2STR(drv->auth_bssid),
1939                                            MAC2STR(drv->bssid));
1940                                 clear_state_mismatch(drv, r->bssid);
1941                         }
1942                 }
1943
1944                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1945                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1946                                    "indicate BSS status with " MACSTR
1947                                    " as associated",
1948                                    MAC2STR(r->bssid));
1949                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1950                             !drv->associated) {
1951                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1952                                            "(not associated) does not match "
1953                                            "with BSS state");
1954                                 clear_state_mismatch(drv, r->bssid);
1955                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1956                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1957                                    0) {
1958                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1959                                            "(associated with " MACSTR ") does "
1960                                            "not match with BSS state",
1961                                            MAC2STR(drv->bssid));
1962                                 clear_state_mismatch(drv, r->bssid);
1963                                 clear_state_mismatch(drv, drv->bssid);
1964                         }
1965                 }
1966         }
1967 }
1968
1969
1970 static void wpa_scan_results_free(struct wpa_scan_results *res)
1971 {
1972         size_t i;
1973
1974         if (res == NULL)
1975                 return;
1976
1977         for (i = 0; i < res->num; i++)
1978                 os_free(res->res[i]);
1979         os_free(res->res);
1980         os_free(res);
1981 }
1982
1983
1984 static struct wpa_scan_results *
1985 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
1986 {
1987         struct nl_msg *msg;
1988         struct wpa_scan_results *res;
1989         int ret;
1990         struct nl80211_bss_info_arg arg;
1991
1992         res = os_zalloc(sizeof(*res));
1993         if (res == NULL)
1994                 return NULL;
1995         msg = nlmsg_alloc();
1996         if (!msg)
1997                 goto nla_put_failure;
1998
1999         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
2000                     NL80211_CMD_GET_SCAN, 0);
2001         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2002
2003         arg.drv = drv;
2004         arg.res = res;
2005         ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
2006         msg = NULL;
2007         if (ret == 0) {
2008                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
2009                            (unsigned long) res->num);
2010                 return res;
2011         }
2012         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
2013                    "(%s)", ret, strerror(-ret));
2014 nla_put_failure:
2015         nlmsg_free(msg);
2016         wpa_scan_results_free(res);
2017         return NULL;
2018 }
2019
2020
2021 /**
2022  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
2023  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2024  * Returns: Scan results on success, -1 on failure
2025  */
2026 static struct wpa_scan_results *
2027 wpa_driver_nl80211_get_scan_results(void *priv)
2028 {
2029         struct i802_bss *bss = priv;
2030         struct wpa_driver_nl80211_data *drv = bss->drv;
2031         struct wpa_scan_results *res;
2032
2033         res = nl80211_get_scan_results(drv);
2034         if (res)
2035                 wpa_driver_nl80211_check_bss_status(drv, res);
2036         return res;
2037 }
2038
2039
2040 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
2041 {
2042         struct wpa_scan_results *res;
2043         size_t i;
2044
2045         res = nl80211_get_scan_results(drv);
2046         if (res == NULL) {
2047                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
2048                 return;
2049         }
2050
2051         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
2052         for (i = 0; i < res->num; i++) {
2053                 struct wpa_scan_res *r = res->res[i];
2054                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
2055                            (int) i, (int) res->num, MAC2STR(r->bssid),
2056                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
2057                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
2058         }
2059
2060         wpa_scan_results_free(res);
2061 }
2062
2063
2064 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
2065                                       enum wpa_alg alg, const u8 *addr,
2066                                       int key_idx, int set_tx,
2067                                       const u8 *seq, size_t seq_len,
2068                                       const u8 *key, size_t key_len)
2069 {
2070         struct i802_bss *bss = priv;
2071         struct wpa_driver_nl80211_data *drv = bss->drv;
2072         int ifindex = if_nametoindex(ifname);
2073         struct nl_msg *msg;
2074         int ret;
2075
2076         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
2077                    "set_tx=%d seq_len=%lu key_len=%lu",
2078                    __func__, ifindex, alg, addr, key_idx, set_tx,
2079                    (unsigned long) seq_len, (unsigned long) key_len);
2080
2081         msg = nlmsg_alloc();
2082         if (!msg)
2083                 return -ENOMEM;
2084
2085         if (alg == WPA_ALG_NONE) {
2086                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2087                             0, NL80211_CMD_DEL_KEY, 0);
2088         } else {
2089                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2090                             0, NL80211_CMD_NEW_KEY, 0);
2091                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2092                 switch (alg) {
2093                 case WPA_ALG_WEP:
2094                         if (key_len == 5)
2095                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2096                                             WLAN_CIPHER_SUITE_WEP40);
2097                         else
2098                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2099                                             WLAN_CIPHER_SUITE_WEP104);
2100                         break;
2101                 case WPA_ALG_TKIP:
2102                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2103                                     WLAN_CIPHER_SUITE_TKIP);
2104                         break;
2105                 case WPA_ALG_CCMP:
2106                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2107                                     WLAN_CIPHER_SUITE_CCMP);
2108                         break;
2109                 case WPA_ALG_IGTK:
2110                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2111                                     WLAN_CIPHER_SUITE_AES_CMAC);
2112                         break;
2113                 default:
2114                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2115                                    "algorithm %d", __func__, alg);
2116                         nlmsg_free(msg);
2117                         return -1;
2118                 }
2119         }
2120
2121         if (seq && seq_len)
2122                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
2123
2124         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2125         {
2126                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
2127                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2128         }
2129         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2130         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2131
2132         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2133         if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
2134                 ret = 0;
2135         if (ret)
2136                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2137                            ret, strerror(-ret));
2138
2139         /*
2140          * If we failed or don't need to set the default TX key (below),
2141          * we're done here.
2142          */
2143         if (ret || !set_tx || alg == WPA_ALG_NONE)
2144                 return ret;
2145 #ifdef HOSTAPD
2146         if (addr)
2147                 return ret;
2148 #else /* HOSTAPD */
2149         if (drv->nlmode == NL80211_IFTYPE_AP && addr)
2150                 return ret;
2151 #endif /* HOSTAPD */
2152
2153         msg = nlmsg_alloc();
2154         if (!msg)
2155                 return -ENOMEM;
2156
2157         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2158                     0, NL80211_CMD_SET_KEY, 0);
2159         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2160         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2161         if (alg == WPA_ALG_IGTK)
2162                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2163         else
2164                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2165
2166         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2167         if (ret == -ENOENT)
2168                 ret = 0;
2169         if (ret)
2170                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2171                            "err=%d %s)", ret, strerror(-ret));
2172         return ret;
2173
2174 nla_put_failure:
2175         return -ENOBUFS;
2176 }
2177
2178
2179 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2180                       int key_idx, int defkey,
2181                       const u8 *seq, size_t seq_len,
2182                       const u8 *key, size_t key_len)
2183 {
2184         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2185         if (!key_attr)
2186                 return -1;
2187
2188         if (defkey && alg == WPA_ALG_IGTK)
2189                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2190         else if (defkey)
2191                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2192
2193         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2194
2195         switch (alg) {
2196         case WPA_ALG_WEP:
2197                 if (key_len == 5)
2198                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2199                                     WLAN_CIPHER_SUITE_WEP40);
2200                 else
2201                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2202                                     WLAN_CIPHER_SUITE_WEP104);
2203                 break;
2204         case WPA_ALG_TKIP:
2205                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2206                 break;
2207         case WPA_ALG_CCMP:
2208                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2209                 break;
2210         case WPA_ALG_IGTK:
2211                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2212                             WLAN_CIPHER_SUITE_AES_CMAC);
2213                 break;
2214         default:
2215                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2216                            "algorithm %d", __func__, alg);
2217                 return -1;
2218         }
2219
2220         if (seq && seq_len)
2221                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2222
2223         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2224
2225         nla_nest_end(msg, key_attr);
2226
2227         return 0;
2228  nla_put_failure:
2229         return -1;
2230 }
2231
2232
2233 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2234                                  struct nl_msg *msg)
2235 {
2236         int i, privacy = 0;
2237         struct nlattr *nl_keys, *nl_key;
2238
2239         for (i = 0; i < 4; i++) {
2240                 if (!params->wep_key[i])
2241                         continue;
2242                 privacy = 1;
2243                 break;
2244         }
2245         if (!privacy)
2246                 return 0;
2247
2248         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2249
2250         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2251         if (!nl_keys)
2252                 goto nla_put_failure;
2253
2254         for (i = 0; i < 4; i++) {
2255                 if (!params->wep_key[i])
2256                         continue;
2257
2258                 nl_key = nla_nest_start(msg, i);
2259                 if (!nl_key)
2260                         goto nla_put_failure;
2261
2262                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2263                         params->wep_key[i]);
2264                 if (params->wep_key_len[i] == 5)
2265                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2266                                     WLAN_CIPHER_SUITE_WEP40);
2267                 else
2268                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2269                                     WLAN_CIPHER_SUITE_WEP104);
2270
2271                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2272
2273                 if (i == params->wep_tx_keyidx)
2274                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2275
2276                 nla_nest_end(msg, nl_key);
2277         }
2278         nla_nest_end(msg, nl_keys);
2279
2280         return 0;
2281
2282 nla_put_failure:
2283         return -ENOBUFS;
2284 }
2285
2286
2287 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2288                                    const u8 *addr, int cmd, u16 reason_code,
2289                                    int local_state_change)
2290 {
2291         int ret = -1;
2292         struct nl_msg *msg;
2293
2294         msg = nlmsg_alloc();
2295         if (!msg)
2296                 return -1;
2297
2298         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2299
2300         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2301         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2302         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2303         if (local_state_change)
2304                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2305
2306         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2307         msg = NULL;
2308         if (ret) {
2309                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2310                            "(%s)", ret, strerror(-ret));
2311                 goto nla_put_failure;
2312         }
2313         ret = 0;
2314
2315 nla_put_failure:
2316         nlmsg_free(msg);
2317         return ret;
2318 }
2319
2320
2321 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2322                                          const u8 *addr, int reason_code)
2323 {
2324         wpa_printf(MSG_DEBUG, "%s", __func__);
2325         drv->associated = 0;
2326         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2327                                        reason_code, 0);
2328 }
2329
2330
2331 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2332                                              int reason_code)
2333 {
2334         struct i802_bss *bss = priv;
2335         struct wpa_driver_nl80211_data *drv = bss->drv;
2336         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2337                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2338         wpa_printf(MSG_DEBUG, "%s", __func__);
2339         drv->associated = 0;
2340         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2341                                        reason_code, 0);
2342 }
2343
2344
2345 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2346                                            int reason_code)
2347 {
2348         struct i802_bss *bss = priv;
2349         struct wpa_driver_nl80211_data *drv = bss->drv;
2350         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2351                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2352         wpa_printf(MSG_DEBUG, "%s", __func__);
2353         drv->associated = 0;
2354         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2355                                        reason_code, 0);
2356 }
2357
2358
2359 static int wpa_driver_nl80211_authenticate(
2360         void *priv, struct wpa_driver_auth_params *params)
2361 {
2362         struct i802_bss *bss = priv;
2363         struct wpa_driver_nl80211_data *drv = bss->drv;
2364         int ret = -1, i;
2365         struct nl_msg *msg;
2366         enum nl80211_auth_type type;
2367         int count = 0;
2368
2369         drv->associated = 0;
2370         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2371         /* FIX: IBSS mode */
2372         if (drv->nlmode != NL80211_IFTYPE_STATION)
2373                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2374
2375         if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2376                 return -1;
2377
2378 retry:
2379         msg = nlmsg_alloc();
2380         if (!msg)
2381                 return -1;
2382
2383         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2384                    drv->ifindex);
2385
2386         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2387                     NL80211_CMD_AUTHENTICATE, 0);
2388
2389         for (i = 0; i < 4; i++) {
2390                 if (!params->wep_key[i])
2391                         continue;
2392                 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
2393                                            NULL, i,
2394                                            i == params->wep_tx_keyidx, NULL, 0,
2395                                            params->wep_key[i],
2396                                            params->wep_key_len[i]);
2397                 if (params->wep_tx_keyidx != i)
2398                         continue;
2399                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2400                                params->wep_key[i], params->wep_key_len[i])) {
2401                         nlmsg_free(msg);
2402                         return -1;
2403                 }
2404         }
2405
2406         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2407         if (params->bssid) {
2408                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2409                            MAC2STR(params->bssid));
2410                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2411         }
2412         if (params->freq) {
2413                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2414                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2415         }
2416         if (params->ssid) {
2417                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2418                                   params->ssid, params->ssid_len);
2419                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2420                         params->ssid);
2421         }
2422         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2423         if (params->ie)
2424                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2425         /*
2426          * TODO: if multiple auth_alg options enabled, try them one by one if
2427          * the AP rejects authentication due to unknown auth alg
2428          */
2429         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2430                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2431         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2432                 type = NL80211_AUTHTYPE_SHARED_KEY;
2433         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2434                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2435         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2436                 type = NL80211_AUTHTYPE_FT;
2437         else
2438                 goto nla_put_failure;
2439         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2440         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2441         if (params->local_state_change) {
2442                 wpa_printf(MSG_DEBUG, "  * Local state change only");
2443                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2444         }
2445
2446         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2447         msg = NULL;
2448         if (ret) {
2449                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2450                            "(%s)", ret, strerror(-ret));
2451                 count++;
2452                 if (ret == -EALREADY && count == 1 && params->bssid &&
2453                     !params->local_state_change) {
2454                         /*
2455                          * mac80211 does not currently accept new
2456                          * authentication if we are already authenticated. As a
2457                          * workaround, force deauthentication and try again.
2458                          */
2459                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2460                                    "after forced deauthentication");
2461                         wpa_driver_nl80211_deauthenticate(
2462                                 bss, params->bssid,
2463                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2464                         nlmsg_free(msg);
2465                         goto retry;
2466                 }
2467                 goto nla_put_failure;
2468         }
2469         ret = 0;
2470         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2471                    "successfully");
2472
2473 nla_put_failure:
2474         nlmsg_free(msg);
2475         return ret;
2476 }
2477
2478
2479 struct phy_info_arg {
2480         u16 *num_modes;
2481         struct hostapd_hw_modes *modes;
2482 };
2483
2484 static int phy_info_handler(struct nl_msg *msg, void *arg)
2485 {
2486         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2487         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2488         struct phy_info_arg *phy_info = arg;
2489
2490         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2491
2492         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2493         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2494                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2495                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2496                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2497                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2498                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2499                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2500         };
2501
2502         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2503         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2504                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2505                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2506         };
2507
2508         struct nlattr *nl_band;
2509         struct nlattr *nl_freq;
2510         struct nlattr *nl_rate;
2511         int rem_band, rem_freq, rem_rate;
2512         struct hostapd_hw_modes *mode;
2513         int idx, mode_is_set;
2514
2515         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2516                   genlmsg_attrlen(gnlh, 0), NULL);
2517
2518         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2519                 return NL_SKIP;
2520
2521         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2522                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2523                 if (!mode)
2524                         return NL_SKIP;
2525                 phy_info->modes = mode;
2526
2527                 mode_is_set = 0;
2528
2529                 mode = &phy_info->modes[*(phy_info->num_modes)];
2530                 memset(mode, 0, sizeof(*mode));
2531                 *(phy_info->num_modes) += 1;
2532
2533                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2534                           nla_len(nl_band), NULL);
2535
2536                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2537                         mode->ht_capab = nla_get_u16(
2538                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2539                 }
2540
2541                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2542                         mode->a_mpdu_params |= nla_get_u8(
2543                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2544                                 0x03;
2545                 }
2546
2547                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2548                         mode->a_mpdu_params |= nla_get_u8(
2549                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2550                                 2;
2551                 }
2552
2553                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2554                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2555                         u8 *mcs;
2556                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2557                         os_memcpy(mode->mcs_set, mcs, 16);
2558                 }
2559
2560                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2561                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2562                                   nla_len(nl_freq), freq_policy);
2563                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2564                                 continue;
2565                         mode->num_channels++;
2566                 }
2567
2568                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2569                 if (!mode->channels)
2570                         return NL_SKIP;
2571
2572                 idx = 0;
2573
2574                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2575                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2576                                   nla_len(nl_freq), freq_policy);
2577                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2578                                 continue;
2579
2580                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2581                         mode->channels[idx].flag = 0;
2582
2583                         if (!mode_is_set) {
2584                                 /* crude heuristic */
2585                                 if (mode->channels[idx].freq < 4000)
2586                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2587                                 else
2588                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2589                                 mode_is_set = 1;
2590                         }
2591
2592                         /* crude heuristic */
2593                         if (mode->channels[idx].freq < 4000)
2594                                 if (mode->channels[idx].freq == 2484)
2595                                         mode->channels[idx].chan = 14;
2596                                 else
2597                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2598                         else
2599                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2600
2601                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2602                                 mode->channels[idx].flag |=
2603                                         HOSTAPD_CHAN_DISABLED;
2604                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2605                                 mode->channels[idx].flag |=
2606                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2607                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2608                                 mode->channels[idx].flag |=
2609                                         HOSTAPD_CHAN_NO_IBSS;
2610                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2611                                 mode->channels[idx].flag |=
2612                                         HOSTAPD_CHAN_RADAR;
2613
2614                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2615                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2616                                 mode->channels[idx].max_tx_power =
2617                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2618
2619                         idx++;
2620                 }
2621
2622                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2623                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2624                                   nla_len(nl_rate), rate_policy);
2625                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2626                                 continue;
2627                         mode->num_rates++;
2628                 }
2629
2630                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2631                 if (!mode->rates)
2632                         return NL_SKIP;
2633
2634                 idx = 0;
2635
2636                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2637                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2638                                   nla_len(nl_rate), rate_policy);
2639                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2640                                 continue;
2641                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2642
2643                         /* crude heuristic */
2644                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2645                             mode->rates[idx] > 200)
2646                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2647
2648                         idx++;
2649                 }
2650         }
2651
2652         return NL_SKIP;
2653 }
2654
2655 static struct hostapd_hw_modes *
2656 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2657 {
2658         u16 m;
2659         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2660         int i, mode11g_idx = -1;
2661
2662         /* If only 802.11g mode is included, use it to construct matching
2663          * 802.11b mode data. */
2664
2665         for (m = 0; m < *num_modes; m++) {
2666                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2667                         return modes; /* 802.11b already included */
2668                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2669                         mode11g_idx = m;
2670         }
2671
2672         if (mode11g_idx < 0)
2673                 return modes; /* 2.4 GHz band not supported at all */
2674
2675         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2676         if (nmodes == NULL)
2677                 return modes; /* Could not add 802.11b mode */
2678
2679         mode = &nmodes[*num_modes];
2680         os_memset(mode, 0, sizeof(*mode));
2681         (*num_modes)++;
2682         modes = nmodes;
2683
2684         mode->mode = HOSTAPD_MODE_IEEE80211B;
2685
2686         mode11g = &modes[mode11g_idx];
2687         mode->num_channels = mode11g->num_channels;
2688         mode->channels = os_malloc(mode11g->num_channels *
2689                                    sizeof(struct hostapd_channel_data));
2690         if (mode->channels == NULL) {
2691                 (*num_modes)--;
2692                 return modes; /* Could not add 802.11b mode */
2693         }
2694         os_memcpy(mode->channels, mode11g->channels,
2695                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2696
2697         mode->num_rates = 0;
2698         mode->rates = os_malloc(4 * sizeof(int));
2699         if (mode->rates == NULL) {
2700                 os_free(mode->channels);
2701                 (*num_modes)--;
2702                 return modes; /* Could not add 802.11b mode */
2703         }
2704
2705         for (i = 0; i < mode11g->num_rates; i++) {
2706                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2707                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2708                         continue;
2709                 mode->rates[mode->num_rates] = mode11g->rates[i];
2710                 mode->num_rates++;
2711                 if (mode->num_rates == 4)
2712                         break;
2713         }
2714
2715         if (mode->num_rates == 0) {
2716                 os_free(mode->channels);
2717                 os_free(mode->rates);
2718                 (*num_modes)--;
2719                 return modes; /* No 802.11b rates */
2720         }
2721
2722         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2723                    "information");
2724
2725         return modes;
2726 }
2727
2728
2729 static struct hostapd_hw_modes *
2730 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2731 {
2732         struct i802_bss *bss = priv;
2733         struct wpa_driver_nl80211_data *drv = bss->drv;
2734         struct nl_msg *msg;
2735         struct phy_info_arg result = {
2736                 .num_modes = num_modes,
2737                 .modes = NULL,
2738         };
2739
2740         *num_modes = 0;
2741         *flags = 0;
2742
2743         msg = nlmsg_alloc();
2744         if (!msg)
2745                 return NULL;
2746
2747         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2748                     0, NL80211_CMD_GET_WIPHY, 0);
2749
2750         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2751
2752         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2753                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2754  nla_put_failure:
2755         return NULL;
2756 }
2757
2758
2759 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2760                                          const void *data, size_t len,
2761                                          int encrypt)
2762 {
2763         __u8 rtap_hdr[] = {
2764                 0x00, 0x00, /* radiotap version */
2765                 0x0e, 0x00, /* radiotap length */
2766                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2767                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2768                 0x00,       /* padding */
2769                 0x00, 0x00, /* RX and TX flags to indicate that */
2770                 0x00, 0x00, /* this is the injected frame directly */
2771         };
2772         struct iovec iov[2] = {
2773                 {
2774                         .iov_base = &rtap_hdr,
2775                         .iov_len = sizeof(rtap_hdr),
2776                 },
2777                 {
2778                         .iov_base = (void *) data,
2779                         .iov_len = len,
2780                 }
2781         };
2782         struct msghdr msg = {
2783                 .msg_name = NULL,
2784                 .msg_namelen = 0,
2785                 .msg_iov = iov,
2786                 .msg_iovlen = 2,
2787                 .msg_control = NULL,
2788                 .msg_controllen = 0,
2789                 .msg_flags = 0,
2790         };
2791
2792         if (encrypt)
2793                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2794
2795         return sendmsg(drv->monitor_sock, &msg, 0);
2796 }
2797
2798
2799 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2800                                         size_t data_len)
2801 {
2802         struct i802_bss *bss = priv;
2803         struct wpa_driver_nl80211_data *drv = bss->drv;
2804         struct ieee80211_mgmt *mgmt;
2805         int encrypt = 1;
2806         u16 fc;
2807
2808         mgmt = (struct ieee80211_mgmt *) data;
2809         fc = le_to_host16(mgmt->frame_control);
2810
2811         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2812             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2813                 /*
2814                  * Only one of the authentication frame types is encrypted.
2815                  * In order for static WEP encryption to work properly (i.e.,
2816                  * to not encrypt the frame), we need to tell mac80211 about
2817                  * the frames that must not be encrypted.
2818                  */
2819                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2820                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2821                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2822                         encrypt = 0;
2823         }
2824
2825         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2826 }
2827
2828
2829 static int wpa_driver_nl80211_set_beacon(void *priv,
2830                                          const u8 *head, size_t head_len,
2831                                          const u8 *tail, size_t tail_len,
2832                                          int dtim_period, int beacon_int)
2833 {
2834         struct i802_bss *bss = priv;
2835         struct wpa_driver_nl80211_data *drv = bss->drv;
2836         struct nl_msg *msg;
2837         u8 cmd = NL80211_CMD_NEW_BEACON;
2838         int ret;
2839         int beacon_set;
2840         int ifindex = if_nametoindex(bss->ifname);
2841
2842         beacon_set = bss->beacon_set;
2843
2844         msg = nlmsg_alloc();
2845         if (!msg)
2846                 return -ENOMEM;
2847
2848         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2849                    beacon_set);
2850         if (beacon_set)
2851                 cmd = NL80211_CMD_SET_BEACON;
2852
2853         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2854                     0, cmd, 0);
2855         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2856         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2857         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2858         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2859         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2860
2861         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2862         if (ret) {
2863                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2864                            ret, strerror(-ret));
2865         } else {
2866                 bss->beacon_set = 1;
2867         }
2868         return ret;
2869  nla_put_failure:
2870         return -ENOBUFS;
2871 }
2872
2873
2874 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2875                                        int freq, int ht_enabled,
2876                                        int sec_channel_offset)
2877 {
2878         struct nl_msg *msg;
2879         int ret;
2880
2881         msg = nlmsg_alloc();
2882         if (!msg)
2883                 return -1;
2884
2885         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2886                     NL80211_CMD_SET_WIPHY, 0);
2887
2888         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2889         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2890         if (ht_enabled) {
2891                 switch (sec_channel_offset) {
2892                 case -1:
2893                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2894                                     NL80211_CHAN_HT40MINUS);
2895                         break;
2896                 case 1:
2897                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2898                                     NL80211_CHAN_HT40PLUS);
2899                         break;
2900                 default:
2901                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2902                                     NL80211_CHAN_HT20);
2903                         break;
2904                 }
2905         }
2906
2907         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2908         if (ret == 0)
2909                 return 0;
2910         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2911                    "%d (%s)", freq, ret, strerror(-ret));
2912 nla_put_failure:
2913         return -1;
2914 }
2915
2916
2917 static int wpa_driver_nl80211_sta_add(void *priv,
2918                                       struct hostapd_sta_add_params *params)
2919 {
2920         struct i802_bss *bss = priv;
2921         struct wpa_driver_nl80211_data *drv = bss->drv;
2922         struct nl_msg *msg;
2923         int ret = -ENOBUFS;
2924
2925         msg = nlmsg_alloc();
2926         if (!msg)
2927                 return -ENOMEM;
2928
2929         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2930                     0, NL80211_CMD_NEW_STATION, 0);
2931
2932         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
2933         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2934         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2935         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2936                 params->supp_rates);
2937         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2938                     params->listen_interval);
2939         if (params->ht_capabilities) {
2940                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2941                         sizeof(*params->ht_capabilities),
2942                         params->ht_capabilities);
2943         }
2944
2945         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2946         if (ret)
2947                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2948                            "result: %d (%s)", ret, strerror(-ret));
2949         if (ret == -EEXIST)
2950                 ret = 0;
2951  nla_put_failure:
2952         return ret;
2953 }
2954
2955
2956 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2957 {
2958         struct i802_bss *bss = priv;
2959         struct wpa_driver_nl80211_data *drv = bss->drv;
2960         struct nl_msg *msg;
2961         int ret;
2962
2963         msg = nlmsg_alloc();
2964         if (!msg)
2965                 return -ENOMEM;
2966
2967         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2968                     0, NL80211_CMD_DEL_STATION, 0);
2969
2970         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2971                     if_nametoindex(bss->ifname));
2972         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2973
2974         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2975         if (ret == -ENOENT)
2976                 return 0;
2977         return ret;
2978  nla_put_failure:
2979         return -ENOBUFS;
2980 }
2981
2982
2983 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2984                                  int ifidx)
2985 {
2986         struct nl_msg *msg;
2987
2988         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
2989
2990 #ifdef HOSTAPD
2991         /* stop listening for EAPOL on this interface */
2992         del_ifidx(drv, ifidx);
2993 #endif /* HOSTAPD */
2994
2995         msg = nlmsg_alloc();
2996         if (!msg)
2997                 goto nla_put_failure;
2998
2999         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3000                     0, NL80211_CMD_DEL_INTERFACE, 0);
3001         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3002
3003         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3004                 return;
3005  nla_put_failure:
3006         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
3007 }
3008
3009
3010 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
3011                                      const char *ifname,
3012                                      enum nl80211_iftype iftype,
3013                                      const u8 *addr, int wds)
3014 {
3015         struct nl_msg *msg, *flags = NULL;
3016         int ifidx;
3017         int ret = -ENOBUFS;
3018
3019         msg = nlmsg_alloc();
3020         if (!msg)
3021                 return -1;
3022
3023         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3024                     0, NL80211_CMD_NEW_INTERFACE, 0);
3025         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3026         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3027         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3028
3029         if (iftype == NL80211_IFTYPE_MONITOR) {
3030                 int err;
3031
3032                 flags = nlmsg_alloc();
3033                 if (!flags)
3034                         goto nla_put_failure;
3035
3036                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3037
3038                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3039
3040                 nlmsg_free(flags);
3041
3042                 if (err)
3043                         goto nla_put_failure;
3044         } else if (wds) {
3045                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
3046         }
3047
3048         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3049         if (ret) {
3050  nla_put_failure:
3051                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
3052                            ifname, ret, strerror(-ret));
3053                 return ret;
3054         }
3055
3056         ifidx = if_nametoindex(ifname);
3057         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
3058                    ifname, ifidx);
3059
3060         if (ifidx <= 0)
3061                 return -1;
3062
3063 #ifdef HOSTAPD
3064         /* start listening for EAPOL on this interface */
3065         add_ifidx(drv, ifidx);
3066 #endif /* HOSTAPD */
3067
3068         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
3069             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
3070                 nl80211_remove_iface(drv, ifidx);
3071                 return -1;
3072         }
3073
3074         return ifidx;
3075 }
3076
3077
3078 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3079                                 const char *ifname, enum nl80211_iftype iftype,
3080                                 const u8 *addr, int wds)
3081 {
3082         int ret;
3083
3084         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
3085
3086         /* if error occured and interface exists already */
3087         if (ret == -ENFILE && if_nametoindex(ifname)) {
3088                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
3089
3090                 /* Try to remove the interface that was already there. */
3091                 nl80211_remove_iface(drv, if_nametoindex(ifname));
3092
3093                 /* Try to create the interface again */
3094                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
3095                                                 wds);
3096         }
3097
3098         if (ret >= 0 && drv->disable_11b_rates)
3099                 nl80211_disable_11b_rates(drv, ret, 1);
3100
3101         return ret;
3102 }
3103
3104
3105 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
3106 {
3107         struct ieee80211_hdr *hdr;
3108         u16 fc;
3109         union wpa_event_data event;
3110
3111         hdr = (struct ieee80211_hdr *) buf;
3112         fc = le_to_host16(hdr->frame_control);
3113
3114         os_memset(&event, 0, sizeof(event));
3115         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
3116         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
3117         event.tx_status.dst = hdr->addr1;
3118         event.tx_status.data = buf;
3119         event.tx_status.data_len = len;
3120         event.tx_status.ack = ok;
3121         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
3122 }
3123
3124
3125 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
3126                              u8 *buf, size_t len)
3127 {
3128         union wpa_event_data event;
3129         os_memset(&event, 0, sizeof(event));
3130         event.rx_from_unknown.frame = buf;
3131         event.rx_from_unknown.len = len;
3132         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
3133 }
3134
3135
3136 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3137                          u8 *buf, size_t len, int datarate, int ssi_signal)
3138 {
3139         struct ieee80211_hdr *hdr;
3140         u16 fc;
3141         union wpa_event_data event;
3142
3143         hdr = (struct ieee80211_hdr *) buf;
3144         fc = le_to_host16(hdr->frame_control);
3145
3146         switch (WLAN_FC_GET_TYPE(fc)) {
3147         case WLAN_FC_TYPE_MGMT:
3148                 os_memset(&event, 0, sizeof(event));
3149                 event.rx_mgmt.frame = buf;
3150                 event.rx_mgmt.frame_len = len;
3151                 event.rx_mgmt.datarate = datarate;
3152                 event.rx_mgmt.ssi_signal = ssi_signal;
3153                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3154                 break;
3155         case WLAN_FC_TYPE_CTRL:
3156                 /* can only get here with PS-Poll frames */
3157                 wpa_printf(MSG_DEBUG, "CTRL");
3158                 from_unknown_sta(drv, buf, len);
3159                 break;
3160         case WLAN_FC_TYPE_DATA:
3161                 from_unknown_sta(drv, buf, len);
3162                 break;
3163         }
3164 }
3165
3166
3167 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3168 {
3169         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3170         int len;
3171         unsigned char buf[3000];
3172         struct ieee80211_radiotap_iterator iter;
3173         int ret;
3174         int datarate = 0, ssi_signal = 0;
3175         int injected = 0, failed = 0, rxflags = 0;
3176
3177         len = recv(sock, buf, sizeof(buf), 0);
3178         if (len < 0) {
3179                 perror("recv");
3180                 return;
3181         }
3182
3183         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3184                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3185                            "frame since Probe Request reporting is disabled");
3186                 return;
3187         }
3188
3189         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3190                 printf("received invalid radiotap frame\n");
3191                 return;
3192         }
3193
3194         while (1) {
3195                 ret = ieee80211_radiotap_iterator_next(&iter);
3196                 if (ret == -ENOENT)
3197                         break;
3198                 if (ret) {
3199                         printf("received invalid radiotap frame (%d)\n", ret);
3200                         return;
3201                 }
3202                 switch (iter.this_arg_index) {
3203                 case IEEE80211_RADIOTAP_FLAGS:
3204                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3205                                 len -= 4;
3206                         break;
3207                 case IEEE80211_RADIOTAP_RX_FLAGS:
3208                         rxflags = 1;
3209                         break;
3210                 case IEEE80211_RADIOTAP_TX_FLAGS:
3211                         injected = 1;
3212                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3213                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3214                         break;
3215                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3216                         break;
3217                 case IEEE80211_RADIOTAP_CHANNEL:
3218                         /* TODO: convert from freq/flags to channel number */
3219                         break;
3220                 case IEEE80211_RADIOTAP_RATE:
3221                         datarate = *iter.this_arg * 5;
3222                         break;
3223                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3224                         ssi_signal = *iter.this_arg;
3225                         break;
3226                 }
3227         }
3228
3229         if (rxflags && injected)
3230                 return;
3231
3232         if (!injected)
3233                 handle_frame(drv, buf + iter.max_length,
3234                              len - iter.max_length, datarate, ssi_signal);
3235         else
3236                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3237                                    len - iter.max_length, !failed);
3238 }
3239
3240
3241 /*
3242  * we post-process the filter code later and rewrite
3243  * this to the offset to the last instruction
3244  */
3245 #define PASS    0xFF
3246 #define FAIL    0xFE
3247
3248 static struct sock_filter msock_filter_insns[] = {
3249         /*
3250          * do a little-endian load of the radiotap length field
3251          */
3252         /* load lower byte into A */
3253         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3254         /* put it into X (== index register) */
3255         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3256         /* load upper byte into A */
3257         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3258         /* left-shift it by 8 */
3259         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3260         /* or with X */
3261         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3262         /* put result into X */
3263         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3264
3265         /*
3266          * Allow management frames through, this also gives us those
3267          * management frames that we sent ourselves with status
3268          */
3269         /* load the lower byte of the IEEE 802.11 frame control field */
3270         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3271         /* mask off frame type and version */
3272         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3273         /* accept frame if it's both 0, fall through otherwise */
3274         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3275
3276         /*
3277          * TODO: add a bit to radiotap RX flags that indicates
3278          * that the sending station is not associated, then
3279          * add a filter here that filters on our DA and that flag
3280          * to allow us to deauth frames to that bad station.
3281          *
3282          * Not a regression -- we didn't do it before either.
3283          */
3284
3285 #if 0
3286         /*
3287          * drop non-data frames
3288          */
3289         /* load the lower byte of the frame control field */
3290         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3291         /* mask off QoS bit */
3292         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3293         /* drop non-data frames */
3294         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3295 #endif
3296         /* load the upper byte of the frame control field */
3297         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3298         /* mask off toDS/fromDS */
3299         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3300         /* accept WDS frames */
3301         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3302
3303         /*
3304          * add header length to index
3305          */
3306         /* load the lower byte of the frame control field */
3307         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3308         /* mask off QoS bit */
3309         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3310         /* right shift it by 6 to give 0 or 2 */
3311         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3312         /* add data frame header length */
3313         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3314         /* add index, was start of 802.11 header */
3315         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3316         /* move to index, now start of LL header */
3317         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3318
3319         /*
3320          * Accept empty data frames, we use those for
3321          * polling activity.
3322          */
3323         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3324         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3325
3326         /*
3327          * Accept EAPOL frames
3328          */
3329         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3330         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3331         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3332         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3333
3334         /* keep these last two statements or change the code below */
3335         /* return 0 == "DROP" */
3336         BPF_STMT(BPF_RET | BPF_K, 0),
3337         /* return ~0 == "keep all" */
3338         BPF_STMT(BPF_RET | BPF_K, ~0),
3339 };
3340
3341 static struct sock_fprog msock_filter = {
3342         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3343         .filter = msock_filter_insns,
3344 };
3345
3346
3347 static int add_monitor_filter(int s)
3348 {
3349         int idx;
3350
3351         /* rewrite all PASS/FAIL jump offsets */
3352         for (idx = 0; idx < msock_filter.len; idx++) {
3353                 struct sock_filter *insn = &msock_filter_insns[idx];
3354
3355                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3356                         if (insn->code == (BPF_JMP|BPF_JA)) {
3357                                 if (insn->k == PASS)
3358                                         insn->k = msock_filter.len - idx - 2;
3359                                 else if (insn->k == FAIL)
3360                                         insn->k = msock_filter.len - idx - 3;
3361                         }
3362
3363                         if (insn->jt == PASS)
3364                                 insn->jt = msock_filter.len - idx - 2;
3365                         else if (insn->jt == FAIL)
3366                                 insn->jt = msock_filter.len - idx - 3;
3367
3368                         if (insn->jf == PASS)
3369                                 insn->jf = msock_filter.len - idx - 2;
3370                         else if (insn->jf == FAIL)
3371                                 insn->jf = msock_filter.len - idx - 3;
3372                 }
3373         }
3374
3375         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3376                        &msock_filter, sizeof(msock_filter))) {
3377                 perror("SO_ATTACH_FILTER");
3378                 return -1;
3379         }
3380
3381         return 0;
3382 }
3383
3384
3385 static void nl80211_remove_monitor_interface(
3386         struct wpa_driver_nl80211_data *drv)
3387 {
3388         if (drv->monitor_ifidx >= 0) {
3389                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3390                 drv->monitor_ifidx = -1;
3391         }
3392         if (drv->monitor_sock >= 0) {
3393                 eloop_unregister_read_sock(drv->monitor_sock);
3394                 close(drv->monitor_sock);
3395                 drv->monitor_sock = -1;
3396         }
3397 }
3398
3399
3400 static int
3401 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3402 {
3403         char buf[IFNAMSIZ];
3404         struct sockaddr_ll ll;
3405         int optval;
3406         socklen_t optlen;
3407
3408         snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
3409         buf[IFNAMSIZ - 1] = '\0';
3410
3411         drv->monitor_ifidx =
3412                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3413                                      0);
3414
3415         if (drv->monitor_ifidx < 0)
3416                 return -1;
3417
3418         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3419                 goto error;
3420
3421         memset(&ll, 0, sizeof(ll));
3422         ll.sll_family = AF_PACKET;
3423         ll.sll_ifindex = drv->monitor_ifidx;
3424         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3425         if (drv->monitor_sock < 0) {
3426                 perror("socket[PF_PACKET,SOCK_RAW]");
3427                 goto error;
3428         }
3429
3430         if (add_monitor_filter(drv->monitor_sock)) {
3431                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3432                            "interface; do filtering in user space");
3433                 /* This works, but will cost in performance. */
3434         }
3435
3436         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3437                 perror("monitor socket bind");
3438                 goto error;
3439         }
3440
3441         optlen = sizeof(optval);
3442         optval = 20;
3443         if (setsockopt
3444             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3445                 perror("Failed to set socket priority");
3446                 goto error;
3447         }
3448
3449         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3450                                      drv, NULL)) {
3451                 printf("Could not register monitor read socket\n");
3452                 goto error;
3453         }
3454
3455         return 0;
3456  error:
3457         nl80211_remove_monitor_interface(drv);
3458         return -1;
3459 }
3460
3461
3462 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3463
3464 static int wpa_driver_nl80211_hapd_send_eapol(
3465         void *priv, const u8 *addr, const u8 *data,
3466         size_t data_len, int encrypt, const u8 *own_addr)
3467 {
3468         struct i802_bss *bss = priv;
3469         struct wpa_driver_nl80211_data *drv = bss->drv;
3470         struct ieee80211_hdr *hdr;
3471         size_t len;
3472         u8 *pos;
3473         int res;
3474 #if 0 /* FIX */
3475         int qos = sta->flags & WPA_STA_WMM;
3476 #else
3477         int qos = 0;
3478 #endif
3479
3480         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3481                 data_len;
3482         hdr = os_zalloc(len);
3483         if (hdr == NULL) {
3484                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3485                        (unsigned long) len);
3486                 return -1;
3487         }
3488
3489         hdr->frame_control =
3490                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3491         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3492         if (encrypt)
3493                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3494 #if 0 /* To be enabled if qos determination is added above */
3495         if (qos) {
3496                 hdr->frame_control |=
3497                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3498         }
3499 #endif
3500
3501         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3502         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3503         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3504         pos = (u8 *) (hdr + 1);
3505
3506 #if 0 /* To be enabled if qos determination is added above */
3507         if (qos) {
3508                 /* add an empty QoS header if needed */
3509                 pos[0] = 0;
3510                 pos[1] = 0;
3511                 pos += 2;
3512         }
3513 #endif
3514
3515         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3516         pos += sizeof(rfc1042_header);
3517         WPA_PUT_BE16(pos, ETH_P_PAE);
3518         pos += 2;
3519         memcpy(pos, data, data_len);
3520
3521         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3522         if (res < 0) {
3523                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3524                            "failed: %d (%s)",
3525                            (unsigned long) len, errno, strerror(errno));
3526         }
3527         os_free(hdr);
3528
3529         return res;
3530 }
3531
3532
3533 static u32 sta_flags_nl80211(int flags)
3534 {
3535         u32 f = 0;
3536
3537         if (flags & WPA_STA_AUTHORIZED)
3538                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3539         if (flags & WPA_STA_WMM)
3540                 f |= BIT(NL80211_STA_FLAG_WME);
3541         if (flags & WPA_STA_SHORT_PREAMBLE)
3542                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3543         if (flags & WPA_STA_MFP)
3544                 f |= BIT(NL80211_STA_FLAG_MFP);
3545
3546         return f;
3547 }
3548
3549
3550 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3551                                             int total_flags,
3552                                             int flags_or, int flags_and)
3553 {
3554         struct i802_bss *bss = priv;
3555         struct wpa_driver_nl80211_data *drv = bss->drv;
3556         struct nl_msg *msg, *flags = NULL;
3557         struct nl80211_sta_flag_update upd;
3558
3559         msg = nlmsg_alloc();
3560         if (!msg)
3561                 return -ENOMEM;
3562
3563         flags = nlmsg_alloc();
3564         if (!flags) {
3565                 nlmsg_free(msg);
3566                 return -ENOMEM;
3567         }
3568
3569         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3570                     0, NL80211_CMD_SET_STATION, 0);
3571
3572         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3573                     if_nametoindex(bss->ifname));
3574         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3575
3576         /*
3577          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3578          * can be removed eventually.
3579          */
3580         if (total_flags & WPA_STA_AUTHORIZED)
3581                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3582
3583         if (total_flags & WPA_STA_WMM)
3584                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3585
3586         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3587                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3588
3589         if (total_flags & WPA_STA_MFP)
3590                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3591
3592         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3593                 goto nla_put_failure;
3594
3595         os_memset(&upd, 0, sizeof(upd));
3596         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3597         upd.set = sta_flags_nl80211(flags_or);
3598         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3599
3600         nlmsg_free(flags);
3601
3602         return send_and_recv_msgs(drv, msg, NULL, NULL);
3603  nla_put_failure:
3604         nlmsg_free(flags);
3605         return -ENOBUFS;
3606 }
3607
3608
3609 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3610                                  struct wpa_driver_associate_params *params)
3611 {
3612         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
3613             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3614                 nl80211_remove_monitor_interface(drv);
3615                 return -1;
3616         }
3617
3618         /* TODO: setup monitor interface (and add code somewhere to remove this
3619          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3620
3621         return 0;
3622 }
3623
3624
3625 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3626 {
3627         struct nl_msg *msg;
3628         int ret = -1;
3629
3630         msg = nlmsg_alloc();
3631         if (!msg)
3632                 return -1;
3633
3634         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3635                     NL80211_CMD_LEAVE_IBSS, 0);
3636         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3637         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3638         msg = NULL;
3639         if (ret) {
3640                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3641                            "(%s)", ret, strerror(-ret));
3642                 goto nla_put_failure;
3643         }
3644
3645         ret = 0;
3646         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3647
3648 nla_put_failure:
3649         nlmsg_free(msg);
3650         return ret;
3651 }
3652
3653
3654 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3655                                    struct wpa_driver_associate_params *params)
3656 {
3657         struct nl_msg *msg;
3658         int ret = -1;
3659         int count = 0;
3660
3661         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3662
3663         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
3664                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3665                            "IBSS mode");
3666                 return -1;
3667         }
3668
3669 retry:
3670         msg = nlmsg_alloc();
3671         if (!msg)
3672                 return -1;
3673
3674         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3675                     NL80211_CMD_JOIN_IBSS, 0);
3676         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3677
3678         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3679                 goto nla_put_failure;
3680
3681         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3682                           params->ssid, params->ssid_len);
3683         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3684                 params->ssid);
3685         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3686         drv->ssid_len = params->ssid_len;
3687
3688         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3689         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3690
3691         ret = nl80211_set_conn_keys(params, msg);
3692         if (ret)
3693                 goto nla_put_failure;
3694
3695         if (params->wpa_ie) {
3696                 wpa_hexdump(MSG_DEBUG,
3697                             "  * Extra IEs for Beacon/Probe Response frames",
3698                             params->wpa_ie, params->wpa_ie_len);
3699                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3700                         params->wpa_ie);
3701         }
3702
3703         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3704         msg = NULL;
3705         if (ret) {
3706                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3707                            ret, strerror(-ret));
3708                 count++;
3709                 if (ret == -EALREADY && count == 1) {
3710                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3711                                    "forced leave");
3712                         nl80211_leave_ibss(drv);
3713                         nlmsg_free(msg);
3714                         goto retry;
3715                 }
3716
3717                 goto nla_put_failure;
3718         }
3719         ret = 0;
3720         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3721
3722 nla_put_failure:
3723         nlmsg_free(msg);
3724         return ret;
3725 }
3726
3727
3728 static int wpa_driver_nl80211_connect(
3729         struct wpa_driver_nl80211_data *drv,
3730         struct wpa_driver_associate_params *params)
3731 {
3732         struct nl_msg *msg;
3733         enum nl80211_auth_type type;
3734         int ret = 0;
3735
3736         msg = nlmsg_alloc();
3737         if (!msg)
3738                 return -1;
3739
3740         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3741         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3742                     NL80211_CMD_CONNECT, 0);
3743
3744         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3745         if (params->bssid) {
3746                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3747                            MAC2STR(params->bssid));
3748                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3749         }
3750         if (params->freq) {
3751                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3752                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3753         }
3754         if (params->ssid) {
3755                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3756                                   params->ssid, params->ssid_len);
3757                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3758                         params->ssid);
3759                 if (params->ssid_len > sizeof(drv->ssid))
3760                         goto nla_put_failure;
3761                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3762                 drv->ssid_len = params->ssid_len;
3763         }
3764         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3765         if (params->wpa_ie)
3766                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3767                         params->wpa_ie);
3768
3769         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3770                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3771         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3772                 type = NL80211_AUTHTYPE_SHARED_KEY;
3773         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3774                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3775         else if (params->auth_alg & WPA_AUTH_ALG_FT)
3776                 type = NL80211_AUTHTYPE_FT;
3777         else
3778                 goto nla_put_failure;
3779
3780         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3781         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3782
3783         if (params->wpa_ie && params->wpa_ie_len) {
3784                 enum nl80211_wpa_versions ver;
3785
3786                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3787                         ver = NL80211_WPA_VERSION_2;
3788                 else
3789                         ver = NL80211_WPA_VERSION_1;
3790
3791                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3792                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3793         }
3794
3795         if (params->pairwise_suite != CIPHER_NONE) {
3796                 int cipher;
3797
3798                 switch (params->pairwise_suite) {
3799                 case CIPHER_WEP40:
3800                         cipher = WLAN_CIPHER_SUITE_WEP40;
3801                         break;
3802                 case CIPHER_WEP104:
3803                         cipher = WLAN_CIPHER_SUITE_WEP104;
3804                         break;
3805                 case CIPHER_CCMP:
3806                         cipher = WLAN_CIPHER_SUITE_CCMP;
3807                         break;
3808                 case CIPHER_TKIP:
3809                 default:
3810                         cipher = WLAN_CIPHER_SUITE_TKIP;
3811                         break;
3812                 }
3813                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3814         }
3815
3816         if (params->group_suite != CIPHER_NONE) {
3817                 int cipher;
3818
3819                 switch (params->group_suite) {
3820                 case CIPHER_WEP40:
3821                         cipher = WLAN_CIPHER_SUITE_WEP40;
3822                         break;
3823                 case CIPHER_WEP104:
3824                         cipher = WLAN_CIPHER_SUITE_WEP104;
3825                         break;
3826                 case CIPHER_CCMP:
3827                         cipher = WLAN_CIPHER_SUITE_CCMP;
3828                         break;
3829                 case CIPHER_TKIP:
3830                 default:
3831                         cipher = WLAN_CIPHER_SUITE_TKIP;
3832                         break;
3833                 }
3834                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3835         }
3836
3837         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3838             params->key_mgmt_suite == KEY_MGMT_PSK) {
3839                 int mgmt = WLAN_AKM_SUITE_PSK;
3840
3841                 switch (params->key_mgmt_suite) {
3842                 case KEY_MGMT_802_1X:
3843                         mgmt = WLAN_AKM_SUITE_8021X;
3844                         break;
3845                 case KEY_MGMT_PSK:
3846                 default:
3847                         mgmt = WLAN_AKM_SUITE_PSK;
3848                         break;
3849                 }
3850                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3851         }
3852
3853         ret = nl80211_set_conn_keys(params, msg);
3854         if (ret)
3855                 goto nla_put_failure;
3856
3857         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3858         msg = NULL;
3859         if (ret) {
3860                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3861                            "(%s)", ret, strerror(-ret));
3862                 goto nla_put_failure;
3863         }
3864         ret = 0;
3865         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3866
3867 nla_put_failure:
3868         nlmsg_free(msg);
3869         return ret;
3870
3871 }
3872
3873
3874 static int wpa_driver_nl80211_associate(
3875         void *priv, struct wpa_driver_associate_params *params)
3876 {
3877         struct i802_bss *bss = priv;
3878         struct wpa_driver_nl80211_data *drv = bss->drv;
3879         int ret = -1;
3880         struct nl_msg *msg;
3881
3882         if (params->mode == IEEE80211_MODE_AP)
3883                 return wpa_driver_nl80211_ap(drv, params);
3884
3885         if (params->mode == IEEE80211_MODE_IBSS)
3886                 return wpa_driver_nl80211_ibss(drv, params);
3887
3888         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3889                 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
3890                         return -1;
3891                 return wpa_driver_nl80211_connect(drv, params);
3892         }
3893
3894         drv->associated = 0;
3895
3896         msg = nlmsg_alloc();
3897         if (!msg)
3898                 return -1;
3899
3900         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3901                    drv->ifindex);
3902         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3903                     NL80211_CMD_ASSOCIATE, 0);
3904
3905         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3906         if (params->bssid) {
3907                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3908                            MAC2STR(params->bssid));
3909                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3910         }
3911         if (params->freq) {
3912                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3913                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3914                 drv->assoc_freq = params->freq;
3915         } else
3916                 drv->assoc_freq = 0;
3917         if (params->ssid) {
3918                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3919                                   params->ssid, params->ssid_len);
3920                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3921                         params->ssid);
3922                 if (params->ssid_len > sizeof(drv->ssid))
3923                         goto nla_put_failure;
3924                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3925                 drv->ssid_len = params->ssid_len;
3926         }
3927         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3928         if (params->wpa_ie)
3929                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3930                         params->wpa_ie);
3931
3932 #ifdef CONFIG_IEEE80211W
3933         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3934                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3935 #endif /* CONFIG_IEEE80211W */
3936
3937         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3938
3939         if (params->prev_bssid) {
3940                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3941                            MAC2STR(params->prev_bssid));
3942                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3943                         params->prev_bssid);
3944         }
3945
3946         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3947         msg = NULL;
3948         if (ret) {
3949                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3950                            "(%s)", ret, strerror(-ret));
3951                 nl80211_dump_scan(drv);
3952                 goto nla_put_failure;
3953         }
3954         ret = 0;
3955         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3956                    "successfully");
3957
3958 nla_put_failure:
3959         nlmsg_free(msg);
3960         return ret;
3961 }
3962
3963
3964 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3965                             int ifindex, int mode)
3966 {
3967         struct nl_msg *msg;
3968         int ret = -ENOBUFS;
3969
3970         msg = nlmsg_alloc();
3971         if (!msg)
3972                 return -ENOMEM;
3973
3974         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3975                     0, NL80211_CMD_SET_INTERFACE, 0);
3976         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3977         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3978
3979         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3980         if (!ret)
3981                 return 0;
3982 nla_put_failure:
3983         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3984                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3985         return ret;
3986 }
3987
3988
3989 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3990 {
3991         struct i802_bss *bss = priv;
3992         struct wpa_driver_nl80211_data *drv = bss->drv;
3993         int ret = -1;
3994         int nlmode;
3995
3996         switch (mode) {
3997         case 0:
3998                 nlmode = NL80211_IFTYPE_STATION;
3999                 break;
4000         case 1:
4001                 nlmode = NL80211_IFTYPE_ADHOC;
4002                 break;
4003         case 2:
4004                 nlmode = NL80211_IFTYPE_AP;
4005                 break;
4006         default:
4007                 return -1;
4008         }
4009
4010         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
4011                 drv->nlmode = nlmode;
4012                 ret = 0;
4013                 goto done;
4014         }
4015
4016         if (nlmode == drv->nlmode) {
4017                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
4018                            "requested mode - ignore error");
4019                 ret = 0;
4020                 goto done; /* Already in the requested mode */
4021         }
4022
4023         /* mac80211 doesn't allow mode changes while the device is up, so
4024          * take the device down, try to set the mode again, and bring the
4025          * device back up.
4026          */
4027         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) == 0) {
4028                 /* Try to set the mode again while the interface is down */
4029                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
4030                 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
4031                         ret = -1;
4032         }
4033
4034         if (!ret) {
4035                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
4036                            "interface is down");
4037                 drv->nlmode = nlmode;
4038         }
4039
4040 done:
4041         if (!ret && nlmode == NL80211_IFTYPE_AP) {
4042                 /* Setup additional AP mode functionality if needed */
4043                 if (drv->monitor_ifidx < 0 &&
4044                     nl80211_create_monitor_interface(drv))
4045                         return -1;
4046         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
4047                 /* Remove additional AP mode functionality */
4048                 nl80211_remove_monitor_interface(drv);
4049                 bss->beacon_set = 0;
4050         }
4051
4052         if (ret)
4053                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
4054                            "from %d failed", nlmode, drv->nlmode);
4055
4056         return ret;
4057 }
4058
4059
4060 static int wpa_driver_nl80211_get_capa(void *priv,
4061                                        struct wpa_driver_capa *capa)
4062 {
4063         struct i802_bss *bss = priv;
4064         struct wpa_driver_nl80211_data *drv = bss->drv;
4065         if (!drv->has_capability)
4066                 return -1;
4067         os_memcpy(capa, &drv->capa, sizeof(*capa));
4068         return 0;
4069 }
4070
4071
4072 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
4073 {
4074         struct i802_bss *bss = priv;
4075         struct wpa_driver_nl80211_data *drv = bss->drv;
4076
4077         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
4078                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
4079         drv->operstate = state;
4080         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
4081                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
4082 }
4083
4084
4085 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
4086 {
4087         struct i802_bss *bss = priv;
4088         struct wpa_driver_nl80211_data *drv = bss->drv;
4089         struct nl_msg *msg;
4090         struct nl80211_sta_flag_update upd;
4091
4092         msg = nlmsg_alloc();
4093         if (!msg)
4094                 return -ENOMEM;
4095
4096         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4097                     0, NL80211_CMD_SET_STATION, 0);
4098
4099         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4100                     if_nametoindex(bss->ifname));
4101         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
4102
4103         os_memset(&upd, 0, sizeof(upd));
4104         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
4105         if (authorized)
4106                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
4107         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4108
4109         return send_and_recv_msgs(drv, msg, NULL, NULL);
4110  nla_put_failure:
4111         return -ENOBUFS;
4112 }
4113
4114
4115 #ifdef HOSTAPD
4116
4117 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4118 {
4119         int i;
4120         int *old;
4121
4122         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
4123                    ifidx);
4124         for (i = 0; i < drv->num_if_indices; i++) {
4125                 if (drv->if_indices[i] == 0) {
4126                         drv->if_indices[i] = ifidx;
4127                         return;
4128                 }
4129         }
4130
4131         if (drv->if_indices != drv->default_if_indices)
4132                 old = drv->if_indices;
4133         else
4134                 old = NULL;
4135
4136         drv->if_indices = os_realloc(old,
4137                                      sizeof(int) * (drv->num_if_indices + 1));
4138         if (!drv->if_indices) {
4139                 if (!old)
4140                         drv->if_indices = drv->default_if_indices;
4141                 else
4142                         drv->if_indices = old;
4143                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4144                            "interfaces");
4145                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4146                 return;
4147         } else if (!old)
4148                 os_memcpy(drv->if_indices, drv->default_if_indices,
4149                           sizeof(drv->default_if_indices));
4150         drv->if_indices[drv->num_if_indices] = ifidx;
4151         drv->num_if_indices++;
4152 }
4153
4154
4155 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4156 {
4157         int i;
4158
4159         for (i = 0; i < drv->num_if_indices; i++) {
4160                 if (drv->if_indices[i] == ifidx) {
4161                         drv->if_indices[i] = 0;
4162                         break;
4163                 }
4164         }
4165 }
4166
4167
4168 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4169 {
4170         int i;
4171
4172         for (i = 0; i < drv->num_if_indices; i++)
4173                 if (drv->if_indices[i] == ifidx)
4174                         return 1;
4175
4176         return 0;
4177 }
4178
4179
4180 static inline int min_int(int a, int b)
4181 {
4182         if (a < b)
4183                 return a;
4184         return b;
4185 }
4186
4187
4188 static int get_key_handler(struct nl_msg *msg, void *arg)
4189 {
4190         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4191         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4192
4193         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4194                   genlmsg_attrlen(gnlh, 0), NULL);
4195
4196         /*
4197          * TODO: validate the key index and mac address!
4198          * Otherwise, there's a race condition as soon as
4199          * the kernel starts sending key notifications.
4200          */
4201
4202         if (tb[NL80211_ATTR_KEY_SEQ])
4203                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4204                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4205         return NL_SKIP;
4206 }
4207
4208
4209 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4210                            int idx, u8 *seq)
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 -ENOMEM;
4219
4220         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4221                     0, NL80211_CMD_GET_KEY, 0);
4222
4223         if (addr)
4224                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4225         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4226         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4227
4228         memset(seq, 0, 6);
4229
4230         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4231  nla_put_failure:
4232         return -ENOBUFS;
4233 }
4234
4235
4236 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4237                               int mode)
4238 {
4239         struct i802_bss *bss = priv;
4240         struct wpa_driver_nl80211_data *drv = bss->drv;
4241         struct nl_msg *msg;
4242         u8 rates[NL80211_MAX_SUPP_RATES];
4243         u8 rates_len = 0;
4244         int i;
4245
4246         msg = nlmsg_alloc();
4247         if (!msg)
4248                 return -ENOMEM;
4249
4250         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4251                     NL80211_CMD_SET_BSS, 0);
4252
4253         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4254                 rates[rates_len++] = basic_rates[i] / 5;
4255
4256         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4257
4258         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4259
4260         return send_and_recv_msgs(drv, msg, NULL, NULL);
4261  nla_put_failure:
4262         return -ENOBUFS;
4263 }
4264
4265 #endif /* HOSTAPD */
4266
4267
4268 /* Set kernel driver on given frequency (MHz) */
4269 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4270 {
4271         struct i802_bss *bss = priv;
4272         struct wpa_driver_nl80211_data *drv = bss->drv;
4273         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4274                                            freq->sec_channel_offset);
4275 }
4276
4277
4278 #ifdef HOSTAPD
4279
4280 static int i802_set_rts(void *priv, int rts)
4281 {
4282         struct i802_bss *bss = priv;
4283         struct wpa_driver_nl80211_data *drv = bss->drv;
4284         struct nl_msg *msg;
4285         int ret = -ENOBUFS;
4286         u32 val;
4287
4288         msg = nlmsg_alloc();
4289         if (!msg)
4290                 return -ENOMEM;
4291
4292         if (rts >= 2347)
4293                 val = (u32) -1;
4294         else
4295                 val = rts;
4296
4297         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4298                     0, NL80211_CMD_SET_WIPHY, 0);
4299         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4300         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4301
4302         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4303         if (!ret)
4304                 return 0;
4305 nla_put_failure:
4306         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4307                    "%d (%s)", rts, ret, strerror(-ret));
4308         return ret;
4309 }
4310
4311
4312 static int i802_set_frag(void *priv, int frag)
4313 {
4314         struct i802_bss *bss = priv;
4315         struct wpa_driver_nl80211_data *drv = bss->drv;
4316         struct nl_msg *msg;
4317         int ret = -ENOBUFS;
4318         u32 val;
4319
4320         msg = nlmsg_alloc();
4321         if (!msg)
4322                 return -ENOMEM;
4323
4324         if (frag >= 2346)
4325                 val = (u32) -1;
4326         else
4327                 val = frag;
4328
4329         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4330                     0, NL80211_CMD_SET_WIPHY, 0);
4331         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4332         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4333
4334         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4335         if (!ret)
4336                 return 0;
4337 nla_put_failure:
4338         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4339                    "%d: %d (%s)", frag, ret, strerror(-ret));
4340         return ret;
4341 }
4342
4343
4344 static int i802_flush(void *priv)
4345 {
4346         struct i802_bss *bss = priv;
4347         struct wpa_driver_nl80211_data *drv = bss->drv;
4348         struct nl_msg *msg;
4349
4350         msg = nlmsg_alloc();
4351         if (!msg)
4352                 return -1;
4353
4354         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4355                     0, NL80211_CMD_DEL_STATION, 0);
4356
4357         /*
4358          * XXX: FIX! this needs to flush all VLANs too
4359          */
4360         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4361                     if_nametoindex(bss->ifname));
4362
4363         return send_and_recv_msgs(drv, msg, NULL, NULL);
4364  nla_put_failure:
4365         return -ENOBUFS;
4366 }
4367
4368
4369 static int get_sta_handler(struct nl_msg *msg, void *arg)
4370 {
4371         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4372         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4373         struct hostap_sta_driver_data *data = arg;
4374         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4375         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4376                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4377                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4378                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4379                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4380                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4381         };
4382
4383         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4384                   genlmsg_attrlen(gnlh, 0), NULL);
4385
4386         /*
4387          * TODO: validate the interface and mac address!
4388          * Otherwise, there's a race condition as soon as
4389          * the kernel starts sending station notifications.
4390          */
4391
4392         if (!tb[NL80211_ATTR_STA_INFO]) {
4393                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4394                 return NL_SKIP;
4395         }
4396         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4397                              tb[NL80211_ATTR_STA_INFO],
4398                              stats_policy)) {
4399                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4400                 return NL_SKIP;
4401         }
4402
4403         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4404                 data->inactive_msec =
4405                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4406         if (stats[NL80211_STA_INFO_RX_BYTES])
4407                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4408         if (stats[NL80211_STA_INFO_TX_BYTES])
4409                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4410         if (stats[NL80211_STA_INFO_RX_PACKETS])
4411                 data->rx_packets =
4412                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4413         if (stats[NL80211_STA_INFO_TX_PACKETS])
4414                 data->tx_packets =
4415                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4416
4417         return NL_SKIP;
4418 }
4419
4420 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4421                               const u8 *addr)
4422 {
4423         struct i802_bss *bss = priv;
4424         struct wpa_driver_nl80211_data *drv = bss->drv;
4425         struct nl_msg *msg;
4426
4427         os_memset(data, 0, sizeof(*data));
4428         msg = nlmsg_alloc();
4429         if (!msg)
4430                 return -ENOMEM;
4431
4432         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4433                     0, NL80211_CMD_GET_STATION, 0);
4434
4435         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4436         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4437
4438         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4439  nla_put_failure:
4440         return -ENOBUFS;
4441 }
4442
4443
4444 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4445                                     int cw_min, int cw_max, int burst_time)
4446 {
4447         struct i802_bss *bss = priv;
4448         struct wpa_driver_nl80211_data *drv = bss->drv;
4449         struct nl_msg *msg;
4450         struct nlattr *txq, *params;
4451
4452         msg = nlmsg_alloc();
4453         if (!msg)
4454                 return -1;
4455
4456         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4457                     0, NL80211_CMD_SET_WIPHY, 0);
4458
4459         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4460
4461         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4462         if (!txq)
4463                 goto nla_put_failure;
4464
4465         /* We are only sending parameters for a single TXQ at a time */
4466         params = nla_nest_start(msg, 1);
4467         if (!params)
4468                 goto nla_put_failure;
4469
4470         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4471         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4472          * 32 usec, so need to convert the value here. */
4473         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4474         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4475         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4476         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4477
4478         nla_nest_end(msg, params);
4479
4480         nla_nest_end(msg, txq);
4481
4482         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4483                 return 0;
4484  nla_put_failure:
4485         return -1;
4486 }
4487
4488
4489 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4490 {
4491         struct i802_bss *bss = priv;
4492         struct wpa_driver_nl80211_data *drv = bss->drv;
4493         struct nl_msg *msg;
4494
4495         msg = nlmsg_alloc();
4496         if (!msg)
4497                 return -ENOMEM;
4498
4499         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4500                     NL80211_CMD_SET_BSS, 0);
4501
4502         if (cts >= 0)
4503                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4504         if (preamble >= 0)
4505                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4506         if (slot >= 0)
4507                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4508
4509         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4510
4511         return send_and_recv_msgs(drv, msg, NULL, NULL);
4512  nla_put_failure:
4513         return -ENOBUFS;
4514 }
4515
4516
4517 static int i802_set_cts_protect(void *priv, int value)
4518 {
4519         return i802_set_bss(priv, value, -1, -1);
4520 }
4521
4522
4523 static int i802_set_preamble(void *priv, int value)
4524 {
4525         return i802_set_bss(priv, -1, value, -1);
4526 }
4527
4528
4529 static int i802_set_short_slot_time(void *priv, int value)
4530 {
4531         return i802_set_bss(priv, -1, -1, value);
4532 }
4533
4534
4535 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4536                              const char *ifname, int vlan_id)
4537 {
4538         struct i802_bss *bss = priv;
4539         struct wpa_driver_nl80211_data *drv = bss->drv;
4540         struct nl_msg *msg;
4541         int ret = -ENOBUFS;
4542
4543         msg = nlmsg_alloc();
4544         if (!msg)
4545                 return -ENOMEM;
4546
4547         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4548                     0, NL80211_CMD_SET_STATION, 0);
4549
4550         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4551                     if_nametoindex(bss->ifname));
4552         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4553         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4554                     if_nametoindex(ifname));
4555
4556         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4557         if (ret < 0) {
4558                 wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
4559                            MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
4560                            MAC2STR(addr), ifname, vlan_id, ret,
4561                            strerror(-ret));
4562         }
4563  nla_put_failure:
4564         return ret;
4565 }
4566
4567
4568 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4569 {
4570         struct i802_bss *bss = priv;
4571         struct wpa_driver_nl80211_data *drv = bss->drv;
4572         char name[IFNAMSIZ + 1];
4573
4574         os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
4575         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4576                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4577         if (val) {
4578                 if (nl80211_create_iface(drv, name, NL80211_IFTYPE_AP_VLAN,
4579                                          NULL, 1) < 0)
4580                         return -1;
4581                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4582                 return i802_set_sta_vlan(priv, addr, name, 0);
4583         } else {
4584                 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
4585                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4586                                                     name);
4587         }
4588 }
4589
4590
4591 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4592 {
4593         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4594         struct sockaddr_ll lladdr;
4595         unsigned char buf[3000];
4596         int len;
4597         socklen_t fromlen = sizeof(lladdr);
4598
4599         len = recvfrom(sock, buf, sizeof(buf), 0,
4600                        (struct sockaddr *)&lladdr, &fromlen);
4601         if (len < 0) {
4602                 perror("recv");
4603                 return;
4604         }
4605
4606         if (have_ifidx(drv, lladdr.sll_ifindex))
4607                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4608 }
4609
4610
4611 static int i802_get_inact_sec(void *priv, const u8 *addr)
4612 {
4613         struct hostap_sta_driver_data data;
4614         int ret;
4615
4616         data.inactive_msec = (unsigned long) -1;
4617         ret = i802_read_sta_data(priv, &data, addr);
4618         if (ret || data.inactive_msec == (unsigned long) -1)
4619                 return -1;
4620         return data.inactive_msec / 1000;
4621 }
4622
4623
4624 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4625 {
4626 #if 0
4627         /* TODO */
4628 #endif
4629         return 0;
4630 }
4631
4632
4633 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4634                            int reason)
4635 {
4636         struct i802_bss *bss = priv;
4637         struct ieee80211_mgmt mgmt;
4638
4639         memset(&mgmt, 0, sizeof(mgmt));
4640         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4641                                           WLAN_FC_STYPE_DEAUTH);
4642         memcpy(mgmt.da, addr, ETH_ALEN);
4643         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4644         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4645         mgmt.u.deauth.reason_code = host_to_le16(reason);
4646         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4647                                             IEEE80211_HDRLEN +
4648                                             sizeof(mgmt.u.deauth));
4649 }
4650
4651
4652 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4653                              int reason)
4654 {
4655         struct i802_bss *bss = priv;
4656         struct ieee80211_mgmt mgmt;
4657
4658         memset(&mgmt, 0, sizeof(mgmt));
4659         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4660                                           WLAN_FC_STYPE_DISASSOC);
4661         memcpy(mgmt.da, addr, ETH_ALEN);
4662         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4663         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4664         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4665         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4666                                             IEEE80211_HDRLEN +
4667                                             sizeof(mgmt.u.disassoc));
4668 }
4669
4670
4671 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4672                              const char *brname, const char *ifname)
4673 {
4674         int ifindex;
4675         char in_br[IFNAMSIZ];
4676
4677         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4678         ifindex = if_nametoindex(brname);
4679         if (ifindex == 0) {
4680                 /*
4681                  * Bridge was configured, but the bridge device does
4682                  * not exist. Try to add it now.
4683                  */
4684                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4685                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4686                                    "bridge interface %s: %s",
4687                                    brname, strerror(errno));
4688                         return -1;
4689                 }
4690                 drv->added_bridge = 1;
4691                 add_ifidx(drv, if_nametoindex(brname));
4692         }
4693
4694         if (linux_br_get(in_br, ifname) == 0) {
4695                 if (os_strcmp(in_br, brname) == 0)
4696                         return 0; /* already in the bridge */
4697
4698                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4699                            "bridge %s", ifname, in_br);
4700                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4701                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4702                                    "remove interface %s from bridge "
4703                                    "%s: %s",
4704                                    ifname, brname, strerror(errno));
4705                         return -1;
4706                 }
4707         }
4708
4709         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4710                    ifname, brname);
4711         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4712                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4713                            "into bridge %s: %s",
4714                            ifname, brname, strerror(errno));
4715                 return -1;
4716         }
4717         drv->added_if_into_bridge = 1;
4718
4719         return 0;
4720 }
4721
4722
4723 static void *i802_init(struct hostapd_data *hapd,
4724                        struct wpa_init_params *params)
4725 {
4726         struct wpa_driver_nl80211_data *drv;
4727         struct i802_bss *bss;
4728         size_t i;
4729         char brname[IFNAMSIZ];
4730         int ifindex, br_ifindex;
4731         int br_added = 0;
4732
4733         bss = wpa_driver_nl80211_init(hapd, params->ifname);
4734         if (bss == NULL)
4735                 return NULL;
4736
4737         drv = bss->drv;
4738         if (linux_br_get(brname, params->ifname) == 0) {
4739                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4740                            params->ifname, brname);
4741                 br_ifindex = if_nametoindex(brname);
4742         } else {
4743                 brname[0] = '\0';
4744                 br_ifindex = 0;
4745         }
4746
4747         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4748         drv->if_indices = drv->default_if_indices;
4749         for (i = 0; i < params->num_bridge; i++) {
4750                 if (params->bridge[i]) {
4751                         ifindex = if_nametoindex(params->bridge[i]);
4752                         if (ifindex)
4753                                 add_ifidx(drv, ifindex);
4754                         if (ifindex == br_ifindex)
4755                                 br_added = 1;
4756                 }
4757         }
4758         if (!br_added && br_ifindex &&
4759             (params->num_bridge == 0 || !params->bridge[0]))
4760                 add_ifidx(drv, br_ifindex);
4761
4762         /* start listening for EAPOL on the default AP interface */
4763         add_ifidx(drv, drv->ifindex);
4764
4765         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
4766                 goto failed;
4767
4768         if (params->bssid) {
4769                 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
4770                                        params->bssid))
4771                         goto failed;
4772         }
4773
4774         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
4775                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4776                            "into AP mode", bss->ifname);
4777                 goto failed;
4778         }
4779
4780         if (params->num_bridge && params->bridge[0] &&
4781             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
4782                 goto failed;
4783
4784         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
4785                 goto failed;
4786
4787         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4788         if (drv->eapol_sock < 0) {
4789                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4790                 goto failed;
4791         }
4792
4793         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4794         {
4795                 printf("Could not register read socket for eapol\n");
4796                 goto failed;
4797         }
4798
4799         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
4800                 goto failed;
4801
4802         return bss;
4803
4804 failed:
4805         nl80211_remove_monitor_interface(drv);
4806         if (drv->ioctl_sock >= 0)
4807                 close(drv->ioctl_sock);
4808
4809         genl_family_put(drv->nl80211);
4810         nl_cache_free(drv->nl_cache);
4811         nl_handle_destroy(drv->nl_handle);
4812         nl_cb_put(drv->nl_cb);
4813
4814         os_free(drv);
4815         return NULL;
4816 }
4817
4818
4819 static void i802_deinit(void *priv)
4820 {
4821         wpa_driver_nl80211_deinit(priv);
4822 }
4823
4824 #endif /* HOSTAPD */
4825
4826
4827 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4828         enum wpa_driver_if_type type)
4829 {
4830         switch (type) {
4831         case WPA_IF_STATION:
4832                 return NL80211_IFTYPE_STATION;
4833         case WPA_IF_AP_VLAN:
4834                 return NL80211_IFTYPE_AP_VLAN;
4835         case WPA_IF_AP_BSS:
4836                 return NL80211_IFTYPE_AP;
4837         }
4838         return -1;
4839 }
4840
4841
4842 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
4843                                      const char *ifname, const u8 *addr,
4844                                      void *bss_ctx, void **drv_priv,
4845                                      char *force_ifname, u8 *if_addr)
4846 {
4847         struct i802_bss *bss = priv;
4848         struct wpa_driver_nl80211_data *drv = bss->drv;
4849         int ifidx;
4850 #ifdef HOSTAPD
4851         struct i802_bss *new_bss = NULL;
4852
4853         if (type == WPA_IF_AP_BSS) {
4854                 new_bss = os_zalloc(sizeof(*new_bss));
4855                 if (new_bss == NULL)
4856                         return -1;
4857         }
4858 #endif /* HOSTAPD */
4859
4860         if (addr)
4861                 os_memcpy(if_addr, addr, ETH_ALEN);
4862         ifidx = nl80211_create_iface(drv, ifname,
4863                                      wpa_driver_nl80211_if_type(type), addr,
4864                                      0);
4865         if (ifidx < 0) {
4866 #ifdef HOSTAPD
4867                 os_free(new_bss);
4868 #endif /* HOSTAPD */
4869                 return -1;
4870         }
4871
4872         if (!addr &&
4873             linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0)
4874                 return -1;
4875
4876 #ifdef HOSTAPD
4877         if (type == WPA_IF_AP_BSS) {
4878                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
4879                         nl80211_remove_iface(drv, ifidx);
4880                         os_free(new_bss);
4881                         return -1;
4882                 }
4883                 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
4884                 new_bss->ifindex = ifidx;
4885                 new_bss->drv = drv;
4886                 new_bss->next = drv->first_bss.next;
4887                 drv->first_bss.next = new_bss;
4888                 if (drv_priv)
4889                         *drv_priv = new_bss;
4890         }
4891 #endif /* HOSTAPD */
4892
4893         return 0;
4894 }
4895
4896
4897 static int wpa_driver_nl80211_if_remove(void *priv,
4898                                         enum wpa_driver_if_type type,
4899                                         const char *ifname)
4900 {
4901         struct i802_bss *bss = priv;
4902         struct wpa_driver_nl80211_data *drv = bss->drv;
4903         int ifindex = if_nametoindex(ifname);
4904
4905         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
4906                    __func__, type, ifname, ifindex);
4907         if (ifindex <= 0)
4908                 return -1;
4909         nl80211_remove_iface(drv, ifindex);
4910
4911 #ifdef HOSTAPD
4912         if (type != WPA_IF_AP_BSS)
4913                 return 0;
4914
4915         if (bss != &drv->first_bss) {
4916                 struct i802_bss *tbss = &drv->first_bss;
4917
4918                 while (tbss) {
4919                         if (tbss->next != bss)
4920                                 continue;
4921
4922                         tbss->next = bss->next;
4923                         os_free(bss);
4924                         break;
4925                 }
4926         }
4927 #endif /* HOSTAPD */
4928
4929         return 0;
4930 }
4931
4932
4933 static int cookie_handler(struct nl_msg *msg, void *arg)
4934 {
4935         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4936         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4937         u64 *cookie = arg;
4938         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4939                   genlmsg_attrlen(gnlh, 0), NULL);
4940         if (tb[NL80211_ATTR_COOKIE])
4941                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
4942         return NL_SKIP;
4943 }
4944
4945
4946 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
4947                                           const u8 *dst, const u8 *src,
4948                                           const u8 *bssid,
4949                                           const u8 *data, size_t data_len)
4950 {
4951         struct i802_bss *bss = priv;
4952         struct wpa_driver_nl80211_data *drv = bss->drv;
4953         int ret = -1;
4954         struct nl_msg *msg;
4955         u8 *buf;
4956         struct ieee80211_hdr *hdr;
4957         u64 cookie;
4958
4959         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
4960                    drv->ifindex);
4961
4962         buf = os_zalloc(24 + data_len);
4963         if (buf == NULL)
4964                 return ret;
4965         os_memcpy(buf + 24, data, data_len);
4966         hdr = (struct ieee80211_hdr *) buf;
4967         hdr->frame_control =
4968                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
4969         os_memcpy(hdr->addr1, dst, ETH_ALEN);
4970         os_memcpy(hdr->addr2, src, ETH_ALEN);
4971         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
4972
4973         if (drv->nlmode == NL80211_IFTYPE_AP) {
4974                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
4975                 os_free(buf);
4976                 return ret;
4977         }
4978
4979         msg = nlmsg_alloc();
4980         if (!msg) {
4981                 os_free(buf);
4982                 return -1;
4983         }
4984
4985         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4986                     NL80211_CMD_ACTION, 0);
4987
4988         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4989         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4990         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
4991         os_free(buf);
4992         buf = NULL;
4993
4994         cookie = 0;
4995         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4996         msg = NULL;
4997         if (ret) {
4998                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
4999                            "(%s)", ret, strerror(-ret));
5000                 goto nla_put_failure;
5001         }
5002         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
5003                    "cookie 0x%llx", (long long unsigned int) cookie);
5004         drv->send_action_cookie = cookie;
5005         drv->pending_send_action = 1;
5006         ret = 0;
5007
5008 nla_put_failure:
5009         os_free(buf);
5010         nlmsg_free(msg);
5011         return ret;
5012 }
5013
5014
5015 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
5016                                                 unsigned int duration)
5017 {
5018         struct i802_bss *bss = priv;
5019         struct wpa_driver_nl80211_data *drv = bss->drv;
5020         struct nl_msg *msg;
5021         int ret;
5022         u64 cookie;
5023
5024         msg = nlmsg_alloc();
5025         if (!msg)
5026                 return -1;
5027
5028         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5029                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
5030
5031         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5032         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5033         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5034
5035         cookie = 0;
5036         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5037         if (ret == 0) {
5038                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
5039                            "0x%llx for freq=%u MHz duration=%u",
5040                            (long long unsigned int) cookie, freq, duration);
5041                 drv->remain_on_chan_cookie = cookie;
5042                 return 0;
5043         }
5044         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
5045                    "(freq=%d): %d (%s)", freq, ret, strerror(-ret));
5046 nla_put_failure:
5047         return -1;
5048 }
5049
5050
5051 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
5052 {
5053         struct i802_bss *bss = priv;
5054         struct wpa_driver_nl80211_data *drv = bss->drv;
5055         struct nl_msg *msg;
5056         int ret;
5057
5058         if (!drv->pending_remain_on_chan) {
5059                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
5060                            "to cancel");
5061                 return -1;
5062         }
5063
5064         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
5065                    "0x%llx",
5066                    (long long unsigned int) drv->remain_on_chan_cookie);
5067
5068         msg = nlmsg_alloc();
5069         if (!msg)
5070                 return -1;
5071
5072         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5073                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
5074
5075         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5076         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
5077
5078         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5079         if (ret == 0)
5080                 return 0;
5081         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
5082                    "%d (%s)", ret, strerror(-ret));
5083 nla_put_failure:
5084         return -1;
5085 }
5086
5087
5088 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
5089                                                         void *timeout_ctx)
5090 {
5091         struct wpa_driver_nl80211_data *drv = eloop_ctx;
5092         if (drv->monitor_ifidx < 0)
5093                 return; /* monitor interface already removed */
5094
5095         if (drv->nlmode != NL80211_IFTYPE_STATION)
5096                 return; /* not in station mode anymore */
5097
5098         if (drv->probe_req_report)
5099                 return; /* reporting enabled */
5100
5101         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
5102                    "Probe Request reporting needed anymore");
5103         nl80211_remove_monitor_interface(drv);
5104 }
5105
5106
5107 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
5108 {
5109         struct i802_bss *bss = priv;
5110         struct wpa_driver_nl80211_data *drv = bss->drv;
5111
5112         if (drv->nlmode != NL80211_IFTYPE_STATION) {
5113                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
5114                            "allowed in station mode (iftype=%d)",
5115                            drv->nlmode);
5116                 return -1;
5117         }
5118         drv->probe_req_report = report;
5119
5120         if (report) {
5121                 eloop_cancel_timeout(
5122                         wpa_driver_nl80211_probe_req_report_timeout,
5123                         drv, NULL);
5124                 if (drv->monitor_ifidx < 0 &&
5125                     nl80211_create_monitor_interface(drv))
5126                         return -1;
5127         } else {
5128                 /*
5129                  * It takes a while to remove the monitor interface, so try to
5130                  * avoid doing this if it is needed again shortly. Instead,
5131                  * schedule the interface to be removed later if no need for it
5132                  * is seen.
5133                  */
5134                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
5135                            "to be removed after 10 seconds of no use");
5136                 eloop_register_timeout(
5137                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
5138                         drv, NULL);
5139         }
5140
5141         return 0;
5142 }
5143
5144
5145 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5146                                      int ifindex, int disabled)
5147 {
5148         struct nl_msg *msg;
5149         struct nlattr *bands, *band;
5150         int ret;
5151
5152         msg = nlmsg_alloc();
5153         if (!msg)
5154                 return -1;
5155
5156         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5157                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5158         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5159
5160         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5161         if (!bands)
5162                 goto nla_put_failure;
5163
5164         /*
5165          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5166          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5167          * rates. All 5 GHz rates are left enabled.
5168          */
5169         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5170         if (!band)
5171                 goto nla_put_failure;
5172         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5173                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5174         nla_nest_end(msg, band);
5175
5176         nla_nest_end(msg, bands);
5177
5178         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5179         msg = NULL;
5180         if (ret) {
5181                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5182                            "(%s)", ret, strerror(-ret));
5183         }
5184
5185         return ret;
5186
5187 nla_put_failure:
5188         nlmsg_free(msg);
5189         return -1;
5190 }
5191
5192
5193 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5194 {
5195         struct i802_bss *bss = priv;
5196         struct wpa_driver_nl80211_data *drv = bss->drv;
5197         drv->disable_11b_rates = disabled;
5198         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5199 }
5200
5201
5202 static int wpa_driver_nl80211_deinit_ap(void *priv)
5203 {
5204         struct i802_bss *bss = priv;
5205         struct wpa_driver_nl80211_data *drv = bss->drv;
5206         if (drv->nlmode != NL80211_IFTYPE_AP)
5207                 return -1;
5208         wpa_driver_nl80211_del_beacon(drv);
5209         return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
5210 }
5211
5212
5213 static void wpa_driver_nl80211_resume(void *priv)
5214 {
5215         struct i802_bss *bss = priv;
5216         struct wpa_driver_nl80211_data *drv = bss->drv;
5217         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
5218                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5219                            "resume event");
5220         }
5221 }
5222
5223
5224 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
5225                                   const u8 *ies, size_t ies_len)
5226 {
5227         struct i802_bss *bss = priv;
5228         struct wpa_driver_nl80211_data *drv = bss->drv;
5229         int ret;
5230         u8 *data, *pos;
5231         size_t data_len;
5232         u8 own_addr[ETH_ALEN];
5233
5234         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
5235                 return -1;
5236
5237         if (action != 1) {
5238                 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
5239                            "action %d", action);
5240                 return -1;
5241         }
5242
5243         /*
5244          * Action frame payload:
5245          * Category[1] = 6 (Fast BSS Transition)
5246          * Action[1] = 1 (Fast BSS Transition Request)
5247          * STA Address
5248          * Target AP Address
5249          * FT IEs
5250          */
5251
5252         data_len = 2 + 2 * ETH_ALEN + ies_len;
5253         data = os_malloc(data_len);
5254         if (data == NULL)
5255                 return -1;
5256         pos = data;
5257         *pos++ = 0x06; /* FT Action category */
5258         *pos++ = action;
5259         os_memcpy(pos, own_addr, ETH_ALEN);
5260         pos += ETH_ALEN;
5261         os_memcpy(pos, target_ap, ETH_ALEN);
5262         pos += ETH_ALEN;
5263         os_memcpy(pos, ies, ies_len);
5264
5265         ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
5266                                              own_addr, drv->bssid,
5267                                              data, data_len);
5268         os_free(data);
5269
5270         return ret;
5271 }
5272
5273
5274 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
5275 {
5276         struct i802_bss *bss = priv;
5277         struct wpa_driver_nl80211_data *drv = bss->drv;
5278         struct nl_msg *msg, *cqm = NULL;
5279
5280         wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
5281                    "hysteresis=%d", threshold, hysteresis);
5282
5283         msg = nlmsg_alloc();
5284         if (!msg)
5285                 return -1;
5286
5287         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5288                     0, NL80211_CMD_SET_CQM, 0);
5289
5290         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
5291
5292         cqm = nlmsg_alloc();
5293         if (cqm == NULL)
5294                 return -1;
5295
5296         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
5297         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
5298         nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
5299
5300         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
5301                 return 0;
5302         msg = NULL;
5303
5304 nla_put_failure:
5305         if (cqm)
5306                 nlmsg_free(cqm);
5307         nlmsg_free(msg);
5308         return -1;
5309 }
5310
5311
5312 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
5313                               int encrypt)
5314 {
5315         struct i802_bss *bss = priv;
5316         struct wpa_driver_nl80211_data *drv = bss->drv;
5317         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
5318 }
5319
5320
5321 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5322         .name = "nl80211",
5323         .desc = "Linux nl80211/cfg80211",
5324         .get_bssid = wpa_driver_nl80211_get_bssid,
5325         .get_ssid = wpa_driver_nl80211_get_ssid,
5326         .set_key = wpa_driver_nl80211_set_key,
5327         .scan2 = wpa_driver_nl80211_scan,
5328         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5329         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5330         .disassociate = wpa_driver_nl80211_disassociate,
5331         .authenticate = wpa_driver_nl80211_authenticate,
5332         .associate = wpa_driver_nl80211_associate,
5333         .init = wpa_driver_nl80211_init,
5334         .deinit = wpa_driver_nl80211_deinit,
5335         .get_capa = wpa_driver_nl80211_get_capa,
5336         .set_operstate = wpa_driver_nl80211_set_operstate,
5337         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5338         .set_country = wpa_driver_nl80211_set_country,
5339         .set_beacon = wpa_driver_nl80211_set_beacon,
5340         .if_add = wpa_driver_nl80211_if_add,
5341         .if_remove = wpa_driver_nl80211_if_remove,
5342         .send_mlme = wpa_driver_nl80211_send_mlme,
5343         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5344         .sta_add = wpa_driver_nl80211_sta_add,
5345         .sta_remove = wpa_driver_nl80211_sta_remove,
5346         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5347         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5348 #ifdef HOSTAPD
5349         .hapd_init = i802_init,
5350         .hapd_deinit = i802_deinit,
5351         .get_seqnum = i802_get_seqnum,
5352         .flush = i802_flush,
5353         .read_sta_data = i802_read_sta_data,
5354         .sta_deauth = i802_sta_deauth,
5355         .sta_disassoc = i802_sta_disassoc,
5356         .get_inact_sec = i802_get_inact_sec,
5357         .sta_clear_stats = i802_sta_clear_stats,
5358         .set_rts = i802_set_rts,
5359         .set_frag = i802_set_frag,
5360         .set_rate_sets = i802_set_rate_sets,
5361         .set_cts_protect = i802_set_cts_protect,
5362         .set_preamble = i802_set_preamble,
5363         .set_short_slot_time = i802_set_short_slot_time,
5364         .set_tx_queue_params = i802_set_tx_queue_params,
5365         .set_sta_vlan = i802_set_sta_vlan,
5366         .set_wds_sta = i802_set_wds_sta,
5367 #endif /* HOSTAPD */
5368         .set_freq = i802_set_freq,
5369         .send_action = wpa_driver_nl80211_send_action,
5370         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5371         .cancel_remain_on_channel =
5372         wpa_driver_nl80211_cancel_remain_on_channel,
5373         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5374         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5375         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5376         .resume = wpa_driver_nl80211_resume,
5377         .send_ft_action = nl80211_send_ft_action,
5378         .signal_monitor = nl80211_signal_monitor,
5379         .send_frame = nl80211_send_frame,
5380 };