src/drivers/driver_nl80211.c

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