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