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", __func__);
2416         drv->associated = 0;
2417         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2418                                        reason_code, 0);
2419 }
2420
2421
2422 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2423                                              int reason_code)
2424 {
2425         struct i802_bss *bss = priv;
2426         struct wpa_driver_nl80211_data *drv = bss->drv;
2427         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2428                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2429         wpa_printf(MSG_DEBUG, "%s", __func__);
2430         drv->associated = 0;
2431         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2432                                        reason_code, 0);
2433 }
2434
2435
2436 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2437                                            int reason_code)
2438 {
2439         struct i802_bss *bss = priv;
2440         struct wpa_driver_nl80211_data *drv = bss->drv;
2441         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2442                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2443         wpa_printf(MSG_DEBUG, "%s", __func__);
2444         drv->associated = 0;
2445         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2446                                        reason_code, 0);
2447 }
2448
2449
2450 static int wpa_driver_nl80211_authenticate(
2451         void *priv, struct wpa_driver_auth_params *params)
2452 {
2453         struct i802_bss *bss = priv;
2454         struct wpa_driver_nl80211_data *drv = bss->drv;
2455         int ret = -1, i;
2456         struct nl_msg *msg;
2457         enum nl80211_auth_type type;
2458         int count = 0;
2459
2460         drv->associated = 0;
2461         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2462         /* FIX: IBSS mode */
2463         if (drv->nlmode != NL80211_IFTYPE_STATION)
2464                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2465
2466         if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2467                 return -1;
2468
2469 retry:
2470         msg = nlmsg_alloc();
2471         if (!msg)
2472                 return -1;
2473
2474         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2475                    drv->ifindex);
2476
2477         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2478                     NL80211_CMD_AUTHENTICATE, 0);
2479
2480         for (i = 0; i < 4; i++) {
2481                 if (!params->wep_key[i])
2482                         continue;
2483                 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
2484                                            NULL, i,
2485                                            i == params->wep_tx_keyidx, NULL, 0,
2486                                            params->wep_key[i],
2487                                            params->wep_key_len[i]);
2488                 if (params->wep_tx_keyidx != i)
2489                         continue;
2490                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2491                                params->wep_key[i], params->wep_key_len[i])) {
2492                         nlmsg_free(msg);
2493                         return -1;
2494                 }
2495         }
2496
2497         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2498         if (params->bssid) {
2499                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2500                            MAC2STR(params->bssid));
2501                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2502         }
2503         if (params->freq) {
2504                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2505                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2506         }
2507         if (params->ssid) {
2508                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2509                                   params->ssid, params->ssid_len);
2510                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2511                         params->ssid);
2512         }
2513         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2514         if (params->ie)
2515                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2516         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2517                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2518         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2519                 type = NL80211_AUTHTYPE_SHARED_KEY;
2520         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2521                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2522         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2523                 type = NL80211_AUTHTYPE_FT;
2524         else
2525                 goto nla_put_failure;
2526         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2527         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2528         if (params->local_state_change) {
2529                 wpa_printf(MSG_DEBUG, "  * Local state change only");
2530                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2531         }
2532
2533         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2534         msg = NULL;
2535         if (ret) {
2536                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2537                            "(%s)", ret, strerror(-ret));
2538                 count++;
2539                 if (ret == -EALREADY && count == 1 && params->bssid &&
2540                     !params->local_state_change) {
2541                         /*
2542                          * mac80211 does not currently accept new
2543                          * authentication if we are already authenticated. As a
2544                          * workaround, force deauthentication and try again.
2545                          */
2546                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2547                                    "after forced deauthentication");
2548                         wpa_driver_nl80211_deauthenticate(
2549                                 bss, params->bssid,
2550                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2551                         nlmsg_free(msg);
2552                         goto retry;
2553                 }
2554                 goto nla_put_failure;
2555         }
2556         ret = 0;
2557         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2558                    "successfully");
2559
2560 nla_put_failure:
2561         nlmsg_free(msg);
2562         return ret;
2563 }
2564
2565
2566 struct phy_info_arg {
2567         u16 *num_modes;
2568         struct hostapd_hw_modes *modes;
2569 };
2570
2571 static int phy_info_handler(struct nl_msg *msg, void *arg)
2572 {
2573         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2574         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2575         struct phy_info_arg *phy_info = arg;
2576
2577         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2578
2579         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2580         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2581                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2582                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2583                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2584                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2585                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2586                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2587         };
2588
2589         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2590         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2591                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2592                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2593         };
2594
2595         struct nlattr *nl_band;
2596         struct nlattr *nl_freq;
2597         struct nlattr *nl_rate;
2598         int rem_band, rem_freq, rem_rate;
2599         struct hostapd_hw_modes *mode;
2600         int idx, mode_is_set;
2601
2602         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2603                   genlmsg_attrlen(gnlh, 0), NULL);
2604
2605         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2606                 return NL_SKIP;
2607
2608         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2609                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2610                 if (!mode)
2611                         return NL_SKIP;
2612                 phy_info->modes = mode;
2613
2614                 mode_is_set = 0;
2615
2616                 mode = &phy_info->modes[*(phy_info->num_modes)];
2617                 memset(mode, 0, sizeof(*mode));
2618                 *(phy_info->num_modes) += 1;
2619
2620                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2621                           nla_len(nl_band), NULL);
2622
2623                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2624                         mode->ht_capab = nla_get_u16(
2625                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2626                 }
2627
2628                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2629                         mode->a_mpdu_params |= nla_get_u8(
2630                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2631                                 0x03;
2632                 }
2633
2634                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2635                         mode->a_mpdu_params |= nla_get_u8(
2636                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2637                                 2;
2638                 }
2639
2640                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2641                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2642                         u8 *mcs;
2643                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2644                         os_memcpy(mode->mcs_set, mcs, 16);
2645                 }
2646
2647                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2648                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2649                                   nla_len(nl_freq), freq_policy);
2650                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2651                                 continue;
2652                         mode->num_channels++;
2653                 }
2654
2655                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2656                 if (!mode->channels)
2657                         return NL_SKIP;
2658
2659                 idx = 0;
2660
2661                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2662                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2663                                   nla_len(nl_freq), freq_policy);
2664                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2665                                 continue;
2666
2667                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2668                         mode->channels[idx].flag = 0;
2669
2670                         if (!mode_is_set) {
2671                                 /* crude heuristic */
2672                                 if (mode->channels[idx].freq < 4000)
2673                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2674                                 else
2675                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2676                                 mode_is_set = 1;
2677                         }
2678
2679                         /* crude heuristic */
2680                         if (mode->channels[idx].freq < 4000)
2681                                 if (mode->channels[idx].freq == 2484)
2682                                         mode->channels[idx].chan = 14;
2683                                 else
2684                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2685                         else
2686                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2687
2688                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2689                                 mode->channels[idx].flag |=
2690                                         HOSTAPD_CHAN_DISABLED;
2691                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2692                                 mode->channels[idx].flag |=
2693                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2694                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2695                                 mode->channels[idx].flag |=
2696                                         HOSTAPD_CHAN_NO_IBSS;
2697                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2698                                 mode->channels[idx].flag |=
2699                                         HOSTAPD_CHAN_RADAR;
2700
2701                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2702                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2703                                 mode->channels[idx].max_tx_power =
2704                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2705
2706                         idx++;
2707                 }
2708
2709                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2710                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2711                                   nla_len(nl_rate), rate_policy);
2712                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2713                                 continue;
2714                         mode->num_rates++;
2715                 }
2716
2717                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2718                 if (!mode->rates)
2719                         return NL_SKIP;
2720
2721                 idx = 0;
2722
2723                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2724                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2725                                   nla_len(nl_rate), rate_policy);
2726                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2727                                 continue;
2728                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2729
2730                         /* crude heuristic */
2731                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2732                             mode->rates[idx] > 200)
2733                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2734
2735                         idx++;
2736                 }
2737         }
2738
2739         return NL_SKIP;
2740 }
2741
2742 static struct hostapd_hw_modes *
2743 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2744 {
2745         u16 m;
2746         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2747         int i, mode11g_idx = -1;
2748
2749         /* If only 802.11g mode is included, use it to construct matching
2750          * 802.11b mode data. */
2751
2752         for (m = 0; m < *num_modes; m++) {
2753                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2754                         return modes; /* 802.11b already included */
2755                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2756                         mode11g_idx = m;
2757         }
2758
2759         if (mode11g_idx < 0)
2760                 return modes; /* 2.4 GHz band not supported at all */
2761
2762         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2763         if (nmodes == NULL)
2764                 return modes; /* Could not add 802.11b mode */
2765
2766         mode = &nmodes[*num_modes];
2767         os_memset(mode, 0, sizeof(*mode));
2768         (*num_modes)++;
2769         modes = nmodes;
2770
2771         mode->mode = HOSTAPD_MODE_IEEE80211B;
2772
2773         mode11g = &modes[mode11g_idx];
2774         mode->num_channels = mode11g->num_channels;
2775         mode->channels = os_malloc(mode11g->num_channels *
2776                                    sizeof(struct hostapd_channel_data));
2777         if (mode->channels == NULL) {
2778                 (*num_modes)--;
2779                 return modes; /* Could not add 802.11b mode */
2780         }
2781         os_memcpy(mode->channels, mode11g->channels,
2782                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2783
2784         mode->num_rates = 0;
2785         mode->rates = os_malloc(4 * sizeof(int));
2786         if (mode->rates == NULL) {
2787                 os_free(mode->channels);
2788                 (*num_modes)--;
2789                 return modes; /* Could not add 802.11b mode */
2790         }
2791
2792         for (i = 0; i < mode11g->num_rates; i++) {
2793                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2794                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2795                         continue;
2796                 mode->rates[mode->num_rates] = mode11g->rates[i];
2797                 mode->num_rates++;
2798                 if (mode->num_rates == 4)
2799                         break;
2800         }
2801
2802         if (mode->num_rates == 0) {
2803                 os_free(mode->channels);
2804                 os_free(mode->rates);
2805                 (*num_modes)--;
2806                 return modes; /* No 802.11b rates */
2807         }
2808
2809         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2810                    "information");
2811
2812         return modes;
2813 }
2814
2815
2816 static struct hostapd_hw_modes *
2817 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2818 {
2819         struct i802_bss *bss = priv;
2820         struct wpa_driver_nl80211_data *drv = bss->drv;
2821         struct nl_msg *msg;
2822         struct phy_info_arg result = {
2823                 .num_modes = num_modes,
2824                 .modes = NULL,
2825         };
2826
2827         *num_modes = 0;
2828         *flags = 0;
2829
2830         msg = nlmsg_alloc();
2831         if (!msg)
2832                 return NULL;
2833
2834         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2835                     0, NL80211_CMD_GET_WIPHY, 0);
2836
2837         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2838
2839         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2840                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2841  nla_put_failure:
2842         return NULL;
2843 }
2844
2845
2846 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2847                                          const void *data, size_t len,
2848                                          int encrypt)
2849 {
2850         __u8 rtap_hdr[] = {
2851                 0x00, 0x00, /* radiotap version */
2852                 0x0e, 0x00, /* radiotap length */
2853                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2854                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2855                 0x00,       /* padding */
2856                 0x00, 0x00, /* RX and TX flags to indicate that */
2857                 0x00, 0x00, /* this is the injected frame directly */
2858         };
2859         struct iovec iov[2] = {
2860                 {
2861                         .iov_base = &rtap_hdr,
2862                         .iov_len = sizeof(rtap_hdr),
2863                 },
2864                 {
2865                         .iov_base = (void *) data,
2866                         .iov_len = len,
2867                 }
2868         };
2869         struct msghdr msg = {
2870                 .msg_name = NULL,
2871                 .msg_namelen = 0,
2872                 .msg_iov = iov,
2873                 .msg_iovlen = 2,
2874                 .msg_control = NULL,
2875                 .msg_controllen = 0,
2876                 .msg_flags = 0,
2877         };
2878
2879         if (encrypt)
2880                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2881
2882         return sendmsg(drv->monitor_sock, &msg, 0);
2883 }
2884
2885
2886 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2887                                         size_t data_len)
2888 {
2889         struct i802_bss *bss = priv;
2890         struct wpa_driver_nl80211_data *drv = bss->drv;
2891         struct ieee80211_mgmt *mgmt;
2892         int encrypt = 1;
2893         u16 fc;
2894
2895         mgmt = (struct ieee80211_mgmt *) data;
2896         fc = le_to_host16(mgmt->frame_control);
2897
2898         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2899             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2900                 /*
2901                  * Only one of the authentication frame types is encrypted.
2902                  * In order for static WEP encryption to work properly (i.e.,
2903                  * to not encrypt the frame), we need to tell mac80211 about
2904                  * the frames that must not be encrypted.
2905                  */
2906                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2907                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2908                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2909                         encrypt = 0;
2910         }
2911
2912         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2913 }
2914
2915
2916 static int wpa_driver_nl80211_set_beacon(void *priv,
2917                                          const u8 *head, size_t head_len,
2918                                          const u8 *tail, size_t tail_len,
2919                                          int dtim_period, int beacon_int)
2920 {
2921         struct i802_bss *bss = priv;
2922         struct wpa_driver_nl80211_data *drv = bss->drv;
2923         struct nl_msg *msg;
2924         u8 cmd = NL80211_CMD_NEW_BEACON;
2925         int ret;
2926         int beacon_set;
2927         int ifindex = if_nametoindex(bss->ifname);
2928
2929         beacon_set = bss->beacon_set;
2930
2931         msg = nlmsg_alloc();
2932         if (!msg)
2933                 return -ENOMEM;
2934
2935         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2936                    beacon_set);
2937         if (beacon_set)
2938                 cmd = NL80211_CMD_SET_BEACON;
2939
2940         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2941                     0, cmd, 0);
2942         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2943         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2944         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2945         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2946         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2947
2948         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2949         if (ret) {
2950                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2951                            ret, strerror(-ret));
2952         } else {
2953                 bss->beacon_set = 1;
2954         }
2955         return ret;
2956  nla_put_failure:
2957         return -ENOBUFS;
2958 }
2959
2960
2961 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2962                                        int freq, int ht_enabled,
2963                                        int sec_channel_offset)
2964 {
2965         struct nl_msg *msg;
2966         int ret;
2967
2968         msg = nlmsg_alloc();
2969         if (!msg)
2970                 return -1;
2971
2972         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2973                     NL80211_CMD_SET_WIPHY, 0);
2974
2975         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2976         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2977         if (ht_enabled) {
2978                 switch (sec_channel_offset) {
2979                 case -1:
2980                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2981                                     NL80211_CHAN_HT40MINUS);
2982                         break;
2983                 case 1:
2984                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2985                                     NL80211_CHAN_HT40PLUS);
2986                         break;
2987                 default:
2988                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2989                                     NL80211_CHAN_HT20);
2990                         break;
2991                 }
2992         }
2993
2994         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2995         if (ret == 0)
2996                 return 0;
2997         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2998                    "%d (%s)", freq, ret, strerror(-ret));
2999 nla_put_failure:
3000         return -1;
3001 }
3002
3003
3004 static int wpa_driver_nl80211_sta_add(void *priv,
3005                                       struct hostapd_sta_add_params *params)
3006 {
3007         struct i802_bss *bss = priv;
3008         struct wpa_driver_nl80211_data *drv = bss->drv;
3009         struct nl_msg *msg;
3010         int ret = -ENOBUFS;
3011
3012         msg = nlmsg_alloc();
3013         if (!msg)
3014                 return -ENOMEM;
3015
3016         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3017                     0, NL80211_CMD_NEW_STATION, 0);
3018
3019         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
3020         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3021         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3022         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3023                 params->supp_rates);
3024         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3025                     params->listen_interval);
3026         if (params->ht_capabilities) {
3027                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3028                         sizeof(*params->ht_capabilities),
3029                         params->ht_capabilities);
3030         }
3031
3032         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3033         if (ret)
3034                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3035                            "result: %d (%s)", ret, strerror(-ret));
3036         if (ret == -EEXIST)
3037                 ret = 0;
3038  nla_put_failure:
3039         return ret;
3040 }
3041
3042
3043 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
3044 {
3045         struct i802_bss *bss = priv;
3046         struct wpa_driver_nl80211_data *drv = bss->drv;
3047         struct nl_msg *msg;
3048         int ret;
3049
3050         msg = nlmsg_alloc();
3051         if (!msg)
3052                 return -ENOMEM;
3053
3054         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3055                     0, NL80211_CMD_DEL_STATION, 0);
3056
3057         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3058                     if_nametoindex(bss->ifname));
3059         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3060
3061         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3062         if (ret == -ENOENT)
3063                 return 0;
3064         return ret;
3065  nla_put_failure:
3066         return -ENOBUFS;
3067 }
3068
3069
3070 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
3071                                  int ifidx)
3072 {
3073         struct nl_msg *msg;
3074
3075         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
3076
3077 #ifdef HOSTAPD
3078         /* stop listening for EAPOL on this interface */
3079         del_ifidx(drv, ifidx);
3080 #endif /* HOSTAPD */
3081
3082         msg = nlmsg_alloc();
3083         if (!msg)
3084                 goto nla_put_failure;
3085
3086         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3087                     0, NL80211_CMD_DEL_INTERFACE, 0);
3088         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3089
3090         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3091                 return;
3092  nla_put_failure:
3093         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
3094 }
3095
3096
3097 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
3098                                      const char *ifname,
3099                                      enum nl80211_iftype iftype,
3100                                      const u8 *addr, int wds)
3101 {
3102         struct nl_msg *msg, *flags = NULL;
3103         int ifidx;
3104         int ret = -ENOBUFS;
3105
3106         msg = nlmsg_alloc();
3107         if (!msg)
3108                 return -1;
3109
3110         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3111                     0, NL80211_CMD_NEW_INTERFACE, 0);
3112         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3113         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3114         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3115
3116         if (iftype == NL80211_IFTYPE_MONITOR) {
3117                 int err;
3118
3119                 flags = nlmsg_alloc();
3120                 if (!flags)
3121                         goto nla_put_failure;
3122
3123                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3124
3125                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3126
3127                 nlmsg_free(flags);
3128
3129                 if (err)
3130                         goto nla_put_failure;
3131         } else if (wds) {
3132                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
3133         }
3134
3135         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3136         if (ret) {
3137  nla_put_failure:
3138                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
3139                            ifname, ret, strerror(-ret));
3140                 return ret;
3141         }
3142
3143         ifidx = if_nametoindex(ifname);
3144         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
3145                    ifname, ifidx);
3146
3147         if (ifidx <= 0)
3148                 return -1;
3149
3150 #ifdef HOSTAPD
3151         /* start listening for EAPOL on this interface */
3152         add_ifidx(drv, ifidx);
3153 #endif /* HOSTAPD */
3154
3155         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
3156             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
3157                 nl80211_remove_iface(drv, ifidx);
3158                 return -1;
3159         }
3160
3161         return ifidx;
3162 }
3163
3164
3165 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3166                                 const char *ifname, enum nl80211_iftype iftype,
3167                                 const u8 *addr, int wds)
3168 {
3169         int ret;
3170
3171         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
3172
3173         /* if error occured and interface exists already */
3174         if (ret == -ENFILE && if_nametoindex(ifname)) {
3175                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
3176
3177                 /* Try to remove the interface that was already there. */
3178                 nl80211_remove_iface(drv, if_nametoindex(ifname));
3179
3180                 /* Try to create the interface again */
3181                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
3182                                                 wds);
3183         }
3184
3185         if (ret >= 0 && drv->disable_11b_rates)
3186                 nl80211_disable_11b_rates(drv, ret, 1);
3187
3188         return ret;
3189 }
3190
3191
3192 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
3193 {
3194         struct ieee80211_hdr *hdr;
3195         u16 fc;
3196         union wpa_event_data event;
3197
3198         hdr = (struct ieee80211_hdr *) buf;
3199         fc = le_to_host16(hdr->frame_control);
3200
3201         os_memset(&event, 0, sizeof(event));
3202         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
3203         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
3204         event.tx_status.dst = hdr->addr1;
3205         event.tx_status.data = buf;
3206         event.tx_status.data_len = len;
3207         event.tx_status.ack = ok;
3208         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
3209 }
3210
3211
3212 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
3213                              u8 *buf, size_t len)
3214 {
3215         union wpa_event_data event;
3216         os_memset(&event, 0, sizeof(event));
3217         event.rx_from_unknown.frame = buf;
3218         event.rx_from_unknown.len = len;
3219         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
3220 }
3221
3222
3223 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3224                          u8 *buf, size_t len, int datarate, int ssi_signal)
3225 {
3226         struct ieee80211_hdr *hdr;
3227         u16 fc;
3228         union wpa_event_data event;
3229
3230         hdr = (struct ieee80211_hdr *) buf;
3231         fc = le_to_host16(hdr->frame_control);
3232
3233         switch (WLAN_FC_GET_TYPE(fc)) {
3234         case WLAN_FC_TYPE_MGMT:
3235                 os_memset(&event, 0, sizeof(event));
3236                 event.rx_mgmt.frame = buf;
3237                 event.rx_mgmt.frame_len = len;
3238                 event.rx_mgmt.datarate = datarate;
3239                 event.rx_mgmt.ssi_signal = ssi_signal;
3240                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3241                 break;
3242         case WLAN_FC_TYPE_CTRL:
3243                 /* can only get here with PS-Poll frames */
3244                 wpa_printf(MSG_DEBUG, "CTRL");
3245                 from_unknown_sta(drv, buf, len);
3246                 break;
3247         case WLAN_FC_TYPE_DATA:
3248                 from_unknown_sta(drv, buf, len);
3249                 break;
3250         }
3251 }
3252
3253
3254 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3255 {
3256         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3257         int len;
3258         unsigned char buf[3000];
3259         struct ieee80211_radiotap_iterator iter;
3260         int ret;
3261         int datarate = 0, ssi_signal = 0;
3262         int injected = 0, failed = 0, rxflags = 0;
3263
3264         len = recv(sock, buf, sizeof(buf), 0);
3265         if (len < 0) {
3266                 perror("recv");
3267                 return;
3268         }
3269
3270         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3271                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3272                            "frame since Probe Request reporting is disabled");
3273                 return;
3274         }
3275
3276         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3277                 printf("received invalid radiotap frame\n");
3278                 return;
3279         }
3280
3281         while (1) {
3282                 ret = ieee80211_radiotap_iterator_next(&iter);
3283                 if (ret == -ENOENT)
3284                         break;
3285                 if (ret) {
3286                         printf("received invalid radiotap frame (%d)\n", ret);
3287                         return;
3288                 }
3289                 switch (iter.this_arg_index) {
3290                 case IEEE80211_RADIOTAP_FLAGS:
3291                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3292                                 len -= 4;
3293                         break;
3294                 case IEEE80211_RADIOTAP_RX_FLAGS:
3295                         rxflags = 1;
3296                         break;
3297                 case IEEE80211_RADIOTAP_TX_FLAGS:
3298                         injected = 1;
3299                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3300                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3301                         break;
3302                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3303                         break;
3304                 case IEEE80211_RADIOTAP_CHANNEL:
3305                         /* TODO: convert from freq/flags to channel number */
3306                         break;
3307                 case IEEE80211_RADIOTAP_RATE:
3308                         datarate = *iter.this_arg * 5;
3309                         break;
3310                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3311                         ssi_signal = *iter.this_arg;
3312                         break;
3313                 }
3314         }
3315
3316         if (rxflags && injected)
3317                 return;
3318
3319         if (!injected)
3320                 handle_frame(drv, buf + iter.max_length,
3321                              len - iter.max_length, datarate, ssi_signal);
3322         else
3323                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3324                                    len - iter.max_length, !failed);
3325 }
3326
3327
3328 /*
3329  * we post-process the filter code later and rewrite
3330  * this to the offset to the last instruction
3331  */
3332 #define PASS    0xFF
3333 #define FAIL    0xFE
3334
3335 static struct sock_filter msock_filter_insns[] = {
3336         /*
3337          * do a little-endian load of the radiotap length field
3338          */
3339         /* load lower byte into A */
3340         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3341         /* put it into X (== index register) */
3342         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3343         /* load upper byte into A */
3344         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3345         /* left-shift it by 8 */
3346         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3347         /* or with X */
3348         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3349         /* put result into X */
3350         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3351
3352         /*
3353          * Allow management frames through, this also gives us those
3354          * management frames that we sent ourselves with status
3355          */
3356         /* load the lower byte of the IEEE 802.11 frame control field */
3357         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3358         /* mask off frame type and version */
3359         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3360         /* accept frame if it's both 0, fall through otherwise */
3361         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3362
3363         /*
3364          * TODO: add a bit to radiotap RX flags that indicates
3365          * that the sending station is not associated, then
3366          * add a filter here that filters on our DA and that flag
3367          * to allow us to deauth frames to that bad station.
3368          *
3369          * Not a regression -- we didn't do it before either.
3370          */
3371
3372 #if 0
3373         /*
3374          * drop non-data frames
3375          */
3376         /* load the lower byte of the frame control field */
3377         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3378         /* mask off QoS bit */
3379         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3380         /* drop non-data frames */
3381         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3382 #endif
3383         /* load the upper byte of the frame control field */
3384         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3385         /* mask off toDS/fromDS */
3386         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3387         /* accept WDS frames */
3388         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3389
3390         /*
3391          * add header length to index
3392          */
3393         /* load the lower byte of the frame control field */
3394         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3395         /* mask off QoS bit */
3396         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3397         /* right shift it by 6 to give 0 or 2 */
3398         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3399         /* add data frame header length */
3400         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3401         /* add index, was start of 802.11 header */
3402         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3403         /* move to index, now start of LL header */
3404         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3405
3406         /*
3407          * Accept empty data frames, we use those for
3408          * polling activity.
3409          */
3410         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3411         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3412
3413         /*
3414          * Accept EAPOL frames
3415          */
3416         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3417         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3418         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3419         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3420
3421         /* keep these last two statements or change the code below */
3422         /* return 0 == "DROP" */
3423         BPF_STMT(BPF_RET | BPF_K, 0),
3424         /* return ~0 == "keep all" */
3425         BPF_STMT(BPF_RET | BPF_K, ~0),
3426 };
3427
3428 static struct sock_fprog msock_filter = {
3429         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3430         .filter = msock_filter_insns,
3431 };
3432
3433
3434 static int add_monitor_filter(int s)
3435 {
3436         int idx;
3437
3438         /* rewrite all PASS/FAIL jump offsets */
3439         for (idx = 0; idx < msock_filter.len; idx++) {
3440                 struct sock_filter *insn = &msock_filter_insns[idx];
3441
3442                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3443                         if (insn->code == (BPF_JMP|BPF_JA)) {
3444                                 if (insn->k == PASS)
3445                                         insn->k = msock_filter.len - idx - 2;
3446                                 else if (insn->k == FAIL)
3447                                         insn->k = msock_filter.len - idx - 3;
3448                         }
3449
3450                         if (insn->jt == PASS)
3451                                 insn->jt = msock_filter.len - idx - 2;
3452                         else if (insn->jt == FAIL)
3453                                 insn->jt = msock_filter.len - idx - 3;
3454
3455                         if (insn->jf == PASS)
3456                                 insn->jf = msock_filter.len - idx - 2;
3457                         else if (insn->jf == FAIL)
3458                                 insn->jf = msock_filter.len - idx - 3;
3459                 }
3460         }
3461
3462         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3463                        &msock_filter, sizeof(msock_filter))) {
3464                 perror("SO_ATTACH_FILTER");
3465                 return -1;
3466         }
3467
3468         return 0;
3469 }
3470
3471
3472 static void nl80211_remove_monitor_interface(
3473         struct wpa_driver_nl80211_data *drv)
3474 {
3475         if (drv->monitor_ifidx >= 0) {
3476                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3477                 drv->monitor_ifidx = -1;
3478         }
3479         if (drv->monitor_sock >= 0) {
3480                 eloop_unregister_read_sock(drv->monitor_sock);
3481                 close(drv->monitor_sock);
3482                 drv->monitor_sock = -1;
3483         }
3484 }
3485
3486
3487 static int
3488 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3489 {
3490         char buf[IFNAMSIZ];
3491         struct sockaddr_ll ll;
3492         int optval;
3493         socklen_t optlen;
3494
3495         snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
3496         buf[IFNAMSIZ - 1] = '\0';
3497
3498         drv->monitor_ifidx =
3499                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3500                                      0);
3501
3502         if (drv->monitor_ifidx < 0)
3503                 return -1;
3504
3505         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3506                 goto error;
3507
3508         memset(&ll, 0, sizeof(ll));
3509         ll.sll_family = AF_PACKET;
3510         ll.sll_ifindex = drv->monitor_ifidx;
3511         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3512         if (drv->monitor_sock < 0) {
3513                 perror("socket[PF_PACKET,SOCK_RAW]");
3514                 goto error;
3515         }
3516
3517         if (add_monitor_filter(drv->monitor_sock)) {
3518                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3519                            "interface; do filtering in user space");
3520                 /* This works, but will cost in performance. */
3521         }
3522
3523         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3524                 perror("monitor socket bind");
3525                 goto error;
3526         }
3527
3528         optlen = sizeof(optval);
3529         optval = 20;
3530         if (setsockopt
3531             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3532                 perror("Failed to set socket priority");
3533                 goto error;
3534         }
3535
3536         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3537                                      drv, NULL)) {
3538                 printf("Could not register monitor read socket\n");
3539                 goto error;
3540         }
3541
3542         return 0;
3543  error:
3544         nl80211_remove_monitor_interface(drv);
3545         return -1;
3546 }
3547
3548
3549 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3550
3551 static int wpa_driver_nl80211_hapd_send_eapol(
3552         void *priv, const u8 *addr, const u8 *data,
3553         size_t data_len, int encrypt, const u8 *own_addr)
3554 {
3555         struct i802_bss *bss = priv;
3556         struct wpa_driver_nl80211_data *drv = bss->drv;
3557         struct ieee80211_hdr *hdr;
3558         size_t len;
3559         u8 *pos;
3560         int res;
3561 #if 0 /* FIX */
3562         int qos = sta->flags & WPA_STA_WMM;
3563 #else
3564         int qos = 0;
3565 #endif
3566
3567         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3568                 data_len;
3569         hdr = os_zalloc(len);
3570         if (hdr == NULL) {
3571                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3572                        (unsigned long) len);
3573                 return -1;
3574         }
3575
3576         hdr->frame_control =
3577                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3578         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3579         if (encrypt)
3580                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3581 #if 0 /* To be enabled if qos determination is added above */
3582         if (qos) {
3583                 hdr->frame_control |=
3584                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3585         }
3586 #endif
3587
3588         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3589         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3590         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3591         pos = (u8 *) (hdr + 1);
3592
3593 #if 0 /* To be enabled if qos determination is added above */
3594         if (qos) {
3595                 /* add an empty QoS header if needed */
3596                 pos[0] = 0;
3597                 pos[1] = 0;
3598                 pos += 2;
3599         }
3600 #endif
3601
3602         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3603         pos += sizeof(rfc1042_header);
3604         WPA_PUT_BE16(pos, ETH_P_PAE);
3605         pos += 2;
3606         memcpy(pos, data, data_len);
3607
3608         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3609         if (res < 0) {
3610                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3611                            "failed: %d (%s)",
3612                            (unsigned long) len, errno, strerror(errno));
3613         }
3614         os_free(hdr);
3615
3616         return res;
3617 }
3618
3619
3620 static u32 sta_flags_nl80211(int flags)
3621 {
3622         u32 f = 0;
3623
3624         if (flags & WPA_STA_AUTHORIZED)
3625                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3626         if (flags & WPA_STA_WMM)
3627                 f |= BIT(NL80211_STA_FLAG_WME);
3628         if (flags & WPA_STA_SHORT_PREAMBLE)
3629                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3630         if (flags & WPA_STA_MFP)
3631                 f |= BIT(NL80211_STA_FLAG_MFP);
3632
3633         return f;
3634 }
3635
3636
3637 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3638                                             int total_flags,
3639                                             int flags_or, int flags_and)
3640 {
3641         struct i802_bss *bss = priv;
3642         struct wpa_driver_nl80211_data *drv = bss->drv;
3643         struct nl_msg *msg, *flags = NULL;
3644         struct nl80211_sta_flag_update upd;
3645
3646         msg = nlmsg_alloc();
3647         if (!msg)
3648                 return -ENOMEM;
3649
3650         flags = nlmsg_alloc();
3651         if (!flags) {
3652                 nlmsg_free(msg);
3653                 return -ENOMEM;
3654         }
3655
3656         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3657                     0, NL80211_CMD_SET_STATION, 0);
3658
3659         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3660                     if_nametoindex(bss->ifname));
3661         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3662
3663         /*
3664          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3665          * can be removed eventually.
3666          */
3667         if (total_flags & WPA_STA_AUTHORIZED)
3668                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3669
3670         if (total_flags & WPA_STA_WMM)
3671                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3672
3673         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3674                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3675
3676         if (total_flags & WPA_STA_MFP)
3677                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3678
3679         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3680                 goto nla_put_failure;
3681
3682         os_memset(&upd, 0, sizeof(upd));
3683         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3684         upd.set = sta_flags_nl80211(flags_or);
3685         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3686
3687         nlmsg_free(flags);
3688
3689         return send_and_recv_msgs(drv, msg, NULL, NULL);
3690  nla_put_failure:
3691         nlmsg_free(flags);
3692         return -ENOBUFS;
3693 }
3694
3695
3696 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3697                                  struct wpa_driver_associate_params *params)
3698 {
3699         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
3700             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3701                 nl80211_remove_monitor_interface(drv);
3702                 return -1;
3703         }
3704
3705         /* TODO: setup monitor interface (and add code somewhere to remove this
3706          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3707
3708         return 0;
3709 }
3710
3711
3712 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3713 {
3714         struct nl_msg *msg;
3715         int ret = -1;
3716
3717         msg = nlmsg_alloc();
3718         if (!msg)
3719                 return -1;
3720
3721         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3722                     NL80211_CMD_LEAVE_IBSS, 0);
3723         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3724         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3725         msg = NULL;
3726         if (ret) {
3727                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3728                            "(%s)", ret, strerror(-ret));
3729                 goto nla_put_failure;
3730         }
3731
3732         ret = 0;
3733         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3734
3735 nla_put_failure:
3736         nlmsg_free(msg);
3737         return ret;
3738 }
3739
3740
3741 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3742                                    struct wpa_driver_associate_params *params)
3743 {
3744         struct nl_msg *msg;
3745         int ret = -1;
3746         int count = 0;
3747
3748         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3749
3750         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
3751                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3752                            "IBSS mode");
3753                 return -1;
3754         }
3755
3756 retry:
3757         msg = nlmsg_alloc();
3758         if (!msg)
3759                 return -1;
3760
3761         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3762                     NL80211_CMD_JOIN_IBSS, 0);
3763         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3764
3765         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3766                 goto nla_put_failure;
3767
3768         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3769                           params->ssid, params->ssid_len);
3770         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3771                 params->ssid);
3772         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3773         drv->ssid_len = params->ssid_len;
3774
3775         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3776         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3777
3778         ret = nl80211_set_conn_keys(params, msg);
3779         if (ret)
3780                 goto nla_put_failure;
3781
3782         if (params->wpa_ie) {
3783                 wpa_hexdump(MSG_DEBUG,
3784                             "  * Extra IEs for Beacon/Probe Response frames",
3785                             params->wpa_ie, params->wpa_ie_len);
3786                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3787                         params->wpa_ie);
3788         }
3789
3790         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3791         msg = NULL;
3792         if (ret) {
3793                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3794                            ret, strerror(-ret));
3795                 count++;
3796                 if (ret == -EALREADY && count == 1) {
3797                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3798                                    "forced leave");
3799                         nl80211_leave_ibss(drv);
3800                         nlmsg_free(msg);
3801                         goto retry;
3802                 }
3803
3804                 goto nla_put_failure;
3805         }
3806         ret = 0;
3807         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3808
3809 nla_put_failure:
3810         nlmsg_free(msg);
3811         return ret;
3812 }
3813
3814
3815 static int wpa_driver_nl80211_connect(
3816         struct wpa_driver_nl80211_data *drv,
3817         struct wpa_driver_associate_params *params)
3818 {
3819         struct nl_msg *msg;
3820         enum nl80211_auth_type type;
3821         int ret = 0;
3822
3823         msg = nlmsg_alloc();
3824         if (!msg)
3825                 return -1;
3826
3827         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3828         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3829                     NL80211_CMD_CONNECT, 0);
3830
3831         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3832         if (params->bssid) {
3833                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3834                            MAC2STR(params->bssid));
3835                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3836         }
3837         if (params->freq) {
3838                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3839                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3840         }
3841         if (params->ssid) {
3842                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3843                                   params->ssid, params->ssid_len);
3844                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3845                         params->ssid);
3846                 if (params->ssid_len > sizeof(drv->ssid))
3847                         goto nla_put_failure;
3848                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3849                 drv->ssid_len = params->ssid_len;
3850         }
3851         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3852         if (params->wpa_ie)
3853                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3854                         params->wpa_ie);
3855
3856         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3857                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3858         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3859                 type = NL80211_AUTHTYPE_SHARED_KEY;
3860         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3861                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3862         else if (params->auth_alg & WPA_AUTH_ALG_FT)
3863                 type = NL80211_AUTHTYPE_FT;
3864         else
3865                 goto nla_put_failure;
3866
3867         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3868         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3869
3870         if (params->wpa_ie && params->wpa_ie_len) {
3871                 enum nl80211_wpa_versions ver;
3872
3873                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3874                         ver = NL80211_WPA_VERSION_2;
3875                 else
3876                         ver = NL80211_WPA_VERSION_1;
3877
3878                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3879                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3880         }
3881
3882         if (params->pairwise_suite != CIPHER_NONE) {
3883                 int cipher;
3884
3885                 switch (params->pairwise_suite) {
3886                 case CIPHER_WEP40:
3887                         cipher = WLAN_CIPHER_SUITE_WEP40;
3888                         break;
3889                 case CIPHER_WEP104:
3890                         cipher = WLAN_CIPHER_SUITE_WEP104;
3891                         break;
3892                 case CIPHER_CCMP:
3893                         cipher = WLAN_CIPHER_SUITE_CCMP;
3894                         break;
3895                 case CIPHER_TKIP:
3896                 default:
3897                         cipher = WLAN_CIPHER_SUITE_TKIP;
3898                         break;
3899                 }
3900                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3901         }
3902
3903         if (params->group_suite != CIPHER_NONE) {
3904                 int cipher;
3905
3906                 switch (params->group_suite) {
3907                 case CIPHER_WEP40:
3908                         cipher = WLAN_CIPHER_SUITE_WEP40;
3909                         break;
3910                 case CIPHER_WEP104:
3911                         cipher = WLAN_CIPHER_SUITE_WEP104;
3912                         break;
3913                 case CIPHER_CCMP:
3914                         cipher = WLAN_CIPHER_SUITE_CCMP;
3915                         break;
3916                 case CIPHER_TKIP:
3917                 default:
3918                         cipher = WLAN_CIPHER_SUITE_TKIP;
3919                         break;
3920                 }
3921                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3922         }
3923
3924         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3925             params->key_mgmt_suite == KEY_MGMT_PSK) {
3926                 int mgmt = WLAN_AKM_SUITE_PSK;
3927
3928                 switch (params->key_mgmt_suite) {
3929                 case KEY_MGMT_802_1X:
3930                         mgmt = WLAN_AKM_SUITE_8021X;
3931                         break;
3932                 case KEY_MGMT_PSK:
3933                 default:
3934                         mgmt = WLAN_AKM_SUITE_PSK;
3935                         break;
3936                 }
3937                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3938         }
3939
3940         ret = nl80211_set_conn_keys(params, msg);
3941         if (ret)
3942                 goto nla_put_failure;
3943
3944         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3945         msg = NULL;
3946         if (ret) {
3947                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3948                            "(%s)", ret, strerror(-ret));
3949                 goto nla_put_failure;
3950         }
3951         ret = 0;
3952         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3953
3954 nla_put_failure:
3955         nlmsg_free(msg);
3956         return ret;
3957
3958 }
3959
3960
3961 static int wpa_driver_nl80211_associate(
3962         void *priv, struct wpa_driver_associate_params *params)
3963 {
3964         struct i802_bss *bss = priv;
3965         struct wpa_driver_nl80211_data *drv = bss->drv;
3966         int ret = -1;
3967         struct nl_msg *msg;
3968
3969         if (params->mode == IEEE80211_MODE_AP)
3970                 return wpa_driver_nl80211_ap(drv, params);
3971
3972         if (params->mode == IEEE80211_MODE_IBSS)
3973                 return wpa_driver_nl80211_ibss(drv, params);
3974
3975         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3976                 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
3977                         return -1;
3978                 return wpa_driver_nl80211_connect(drv, params);
3979         }
3980
3981         drv->associated = 0;
3982
3983         msg = nlmsg_alloc();
3984         if (!msg)
3985                 return -1;
3986
3987         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3988                    drv->ifindex);
3989         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3990                     NL80211_CMD_ASSOCIATE, 0);
3991
3992         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3993         if (params->bssid) {
3994                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3995                            MAC2STR(params->bssid));
3996                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3997         }
3998         if (params->freq) {
3999                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
4000                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
4001                 drv->assoc_freq = params->freq;
4002         } else
4003                 drv->assoc_freq = 0;
4004         if (params->ssid) {
4005                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
4006                                   params->ssid, params->ssid_len);
4007                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
4008                         params->ssid);
4009                 if (params->ssid_len > sizeof(drv->ssid))
4010                         goto nla_put_failure;
4011                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
4012                 drv->ssid_len = params->ssid_len;
4013         }
4014         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
4015         if (params->wpa_ie)
4016                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
4017                         params->wpa_ie);
4018
4019 #ifdef CONFIG_IEEE80211W
4020         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
4021                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
4022 #endif /* CONFIG_IEEE80211W */
4023
4024         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
4025
4026         if (params->prev_bssid) {
4027                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
4028                            MAC2STR(params->prev_bssid));
4029                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
4030                         params->prev_bssid);
4031         }
4032
4033         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4034         msg = NULL;
4035         if (ret) {
4036                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
4037                            "(%s)", ret, strerror(-ret));
4038                 nl80211_dump_scan(drv);
4039                 goto nla_put_failure;
4040         }
4041         ret = 0;
4042         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
4043                    "successfully");
4044
4045 nla_put_failure:
4046         nlmsg_free(msg);
4047         return ret;
4048 }
4049
4050
4051 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
4052                             int ifindex, int mode)
4053 {
4054         struct nl_msg *msg;
4055         int ret = -ENOBUFS;
4056
4057         msg = nlmsg_alloc();
4058         if (!msg)
4059                 return -ENOMEM;
4060
4061         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4062                     0, NL80211_CMD_SET_INTERFACE, 0);
4063         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4064         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
4065
4066         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4067         if (!ret)
4068                 return 0;
4069 nla_put_failure:
4070         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
4071                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
4072         return ret;
4073 }
4074
4075
4076 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
4077 {
4078         struct i802_bss *bss = priv;
4079         struct wpa_driver_nl80211_data *drv = bss->drv;
4080         int ret = -1;
4081         int nlmode;
4082         int i;
4083
4084         switch (mode) {
4085         case 0:
4086                 nlmode = NL80211_IFTYPE_STATION;
4087                 break;
4088         case 1:
4089                 nlmode = NL80211_IFTYPE_ADHOC;
4090                 break;
4091         case 2:
4092                 nlmode = NL80211_IFTYPE_AP;
4093                 break;
4094         default:
4095                 return -1;
4096         }
4097
4098         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
4099                 drv->nlmode = nlmode;
4100                 ret = 0;
4101                 goto done;
4102         }
4103
4104         if (nlmode == drv->nlmode) {
4105                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
4106                            "requested mode - ignore error");
4107                 ret = 0;
4108                 goto done; /* Already in the requested mode */
4109         }
4110
4111         /* mac80211 doesn't allow mode changes while the device is up, so
4112          * take the device down, try to set the mode again, and bring the
4113          * device back up.
4114          */
4115         wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
4116                    "interface down");
4117         for (i = 0; i < 10; i++) {
4118                 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) ==
4119                     0) {
4120                         /* Try to set the mode again while the interface is
4121                          * down */
4122                         ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
4123                         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname,
4124                                                   1))
4125                                 ret = -1;
4126                         if (!ret)
4127                                 break;
4128                 } else
4129                         wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
4130                                    "interface down");
4131                 os_sleep(0, 100000);
4132         }
4133
4134         if (!ret) {
4135                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
4136                            "interface is down");
4137                 drv->nlmode = nlmode;
4138         }
4139
4140 done:
4141         if (!ret && nlmode == NL80211_IFTYPE_AP) {
4142                 /* Setup additional AP mode functionality if needed */
4143                 if (drv->monitor_ifidx < 0 &&
4144                     nl80211_create_monitor_interface(drv))
4145                         return -1;
4146         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
4147                 /* Remove additional AP mode functionality */
4148                 nl80211_remove_monitor_interface(drv);
4149                 bss->beacon_set = 0;
4150         }
4151
4152         if (ret)
4153                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
4154                            "from %d failed", nlmode, drv->nlmode);
4155
4156         return ret;
4157 }
4158
4159
4160 static int wpa_driver_nl80211_get_capa(void *priv,
4161                                        struct wpa_driver_capa *capa)
4162 {
4163         struct i802_bss *bss = priv;
4164         struct wpa_driver_nl80211_data *drv = bss->drv;
4165         if (!drv->has_capability)
4166                 return -1;
4167         os_memcpy(capa, &drv->capa, sizeof(*capa));
4168         return 0;
4169 }
4170
4171
4172 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
4173 {
4174         struct i802_bss *bss = priv;
4175         struct wpa_driver_nl80211_data *drv = bss->drv;
4176
4177         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
4178                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
4179         drv->operstate = state;
4180         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
4181                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
4182 }
4183
4184
4185 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
4186 {
4187         struct i802_bss *bss = priv;
4188         struct wpa_driver_nl80211_data *drv = bss->drv;
4189         struct nl_msg *msg;
4190         struct nl80211_sta_flag_update upd;
4191
4192         msg = nlmsg_alloc();
4193         if (!msg)
4194                 return -ENOMEM;
4195
4196         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4197                     0, NL80211_CMD_SET_STATION, 0);
4198
4199         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4200                     if_nametoindex(bss->ifname));
4201         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
4202
4203         os_memset(&upd, 0, sizeof(upd));
4204         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
4205         if (authorized)
4206                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
4207         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4208
4209         return send_and_recv_msgs(drv, msg, NULL, NULL);
4210  nla_put_failure:
4211         return -ENOBUFS;
4212 }
4213
4214
4215 #ifdef HOSTAPD
4216
4217 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4218 {
4219         int i;
4220         int *old;
4221
4222         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
4223                    ifidx);
4224         for (i = 0; i < drv->num_if_indices; i++) {
4225                 if (drv->if_indices[i] == 0) {
4226                         drv->if_indices[i] = ifidx;
4227                         return;
4228                 }
4229         }
4230
4231         if (drv->if_indices != drv->default_if_indices)
4232                 old = drv->if_indices;
4233         else
4234                 old = NULL;
4235
4236         drv->if_indices = os_realloc(old,
4237                                      sizeof(int) * (drv->num_if_indices + 1));
4238         if (!drv->if_indices) {
4239                 if (!old)
4240                         drv->if_indices = drv->default_if_indices;
4241                 else
4242                         drv->if_indices = old;
4243                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4244                            "interfaces");
4245                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4246                 return;
4247         } else if (!old)
4248                 os_memcpy(drv->if_indices, drv->default_if_indices,
4249                           sizeof(drv->default_if_indices));
4250         drv->if_indices[drv->num_if_indices] = ifidx;
4251         drv->num_if_indices++;
4252 }
4253
4254
4255 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4256 {
4257         int i;
4258
4259         for (i = 0; i < drv->num_if_indices; i++) {
4260                 if (drv->if_indices[i] == ifidx) {
4261                         drv->if_indices[i] = 0;
4262                         break;
4263                 }
4264         }
4265 }
4266
4267
4268 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4269 {
4270         int i;
4271
4272         for (i = 0; i < drv->num_if_indices; i++)
4273                 if (drv->if_indices[i] == ifidx)
4274                         return 1;
4275
4276         return 0;
4277 }
4278
4279
4280 static inline int min_int(int a, int b)
4281 {
4282         if (a < b)
4283                 return a;
4284         return b;
4285 }
4286
4287
4288 static int get_key_handler(struct nl_msg *msg, void *arg)
4289 {
4290         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4291         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4292
4293         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4294                   genlmsg_attrlen(gnlh, 0), NULL);
4295
4296         /*
4297          * TODO: validate the key index and mac address!
4298          * Otherwise, there's a race condition as soon as
4299          * the kernel starts sending key notifications.
4300          */
4301
4302         if (tb[NL80211_ATTR_KEY_SEQ])
4303                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4304                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4305         return NL_SKIP;
4306 }
4307
4308
4309 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4310                            int idx, u8 *seq)
4311 {
4312         struct i802_bss *bss = priv;
4313         struct wpa_driver_nl80211_data *drv = bss->drv;
4314         struct nl_msg *msg;
4315
4316         msg = nlmsg_alloc();
4317         if (!msg)
4318                 return -ENOMEM;
4319
4320         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4321                     0, NL80211_CMD_GET_KEY, 0);
4322
4323         if (addr)
4324                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4325         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4326         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4327
4328         memset(seq, 0, 6);
4329
4330         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4331  nla_put_failure:
4332         return -ENOBUFS;
4333 }
4334
4335
4336 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4337                               int mode)
4338 {
4339         struct i802_bss *bss = priv;
4340         struct wpa_driver_nl80211_data *drv = bss->drv;
4341         struct nl_msg *msg;
4342         u8 rates[NL80211_MAX_SUPP_RATES];
4343         u8 rates_len = 0;
4344         int i;
4345
4346         msg = nlmsg_alloc();
4347         if (!msg)
4348                 return -ENOMEM;
4349
4350         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4351                     NL80211_CMD_SET_BSS, 0);
4352
4353         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4354                 rates[rates_len++] = basic_rates[i] / 5;
4355
4356         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4357
4358         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4359
4360         return send_and_recv_msgs(drv, msg, NULL, NULL);
4361  nla_put_failure:
4362         return -ENOBUFS;
4363 }
4364
4365 #endif /* HOSTAPD */
4366
4367
4368 /* Set kernel driver on given frequency (MHz) */
4369 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4370 {
4371         struct i802_bss *bss = priv;
4372         struct wpa_driver_nl80211_data *drv = bss->drv;
4373         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4374                                            freq->sec_channel_offset);
4375 }
4376
4377
4378 #ifdef HOSTAPD
4379
4380 static int i802_set_rts(void *priv, int rts)
4381 {
4382         struct i802_bss *bss = priv;
4383         struct wpa_driver_nl80211_data *drv = bss->drv;
4384         struct nl_msg *msg;
4385         int ret = -ENOBUFS;
4386         u32 val;
4387
4388         msg = nlmsg_alloc();
4389         if (!msg)
4390                 return -ENOMEM;
4391
4392         if (rts >= 2347)
4393                 val = (u32) -1;
4394         else
4395                 val = rts;
4396
4397         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4398                     0, NL80211_CMD_SET_WIPHY, 0);
4399         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4400         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4401
4402         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4403         if (!ret)
4404                 return 0;
4405 nla_put_failure:
4406         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4407                    "%d (%s)", rts, ret, strerror(-ret));
4408         return ret;
4409 }
4410
4411
4412 static int i802_set_frag(void *priv, int frag)
4413 {
4414         struct i802_bss *bss = priv;
4415         struct wpa_driver_nl80211_data *drv = bss->drv;
4416         struct nl_msg *msg;
4417         int ret = -ENOBUFS;
4418         u32 val;
4419
4420         msg = nlmsg_alloc();
4421         if (!msg)
4422                 return -ENOMEM;
4423
4424         if (frag >= 2346)
4425                 val = (u32) -1;
4426         else
4427                 val = frag;
4428
4429         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4430                     0, NL80211_CMD_SET_WIPHY, 0);
4431         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4432         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4433
4434         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4435         if (!ret)
4436                 return 0;
4437 nla_put_failure:
4438         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4439                    "%d: %d (%s)", frag, ret, strerror(-ret));
4440         return ret;
4441 }
4442
4443
4444 static int i802_flush(void *priv)
4445 {
4446         struct i802_bss *bss = priv;
4447         struct wpa_driver_nl80211_data *drv = bss->drv;
4448         struct nl_msg *msg;
4449
4450         msg = nlmsg_alloc();
4451         if (!msg)
4452                 return -1;
4453
4454         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4455                     0, NL80211_CMD_DEL_STATION, 0);
4456
4457         /*
4458          * XXX: FIX! this needs to flush all VLANs too
4459          */
4460         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4461                     if_nametoindex(bss->ifname));
4462
4463         return send_and_recv_msgs(drv, msg, NULL, NULL);
4464  nla_put_failure:
4465         return -ENOBUFS;
4466 }
4467
4468
4469 static int get_sta_handler(struct nl_msg *msg, void *arg)
4470 {
4471         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4472         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4473         struct hostap_sta_driver_data *data = arg;
4474         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4475         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4476                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4477                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4478                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4479                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4480                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4481         };
4482
4483         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4484                   genlmsg_attrlen(gnlh, 0), NULL);
4485
4486         /*
4487          * TODO: validate the interface and mac address!
4488          * Otherwise, there's a race condition as soon as
4489          * the kernel starts sending station notifications.
4490          */
4491
4492         if (!tb[NL80211_ATTR_STA_INFO]) {
4493                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4494                 return NL_SKIP;
4495         }
4496         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4497                              tb[NL80211_ATTR_STA_INFO],
4498                              stats_policy)) {
4499                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4500                 return NL_SKIP;
4501         }
4502
4503         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4504                 data->inactive_msec =
4505                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4506         if (stats[NL80211_STA_INFO_RX_BYTES])
4507                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4508         if (stats[NL80211_STA_INFO_TX_BYTES])
4509                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4510         if (stats[NL80211_STA_INFO_RX_PACKETS])
4511                 data->rx_packets =
4512                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4513         if (stats[NL80211_STA_INFO_TX_PACKETS])
4514                 data->tx_packets =
4515                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4516
4517         return NL_SKIP;
4518 }
4519
4520 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4521                               const u8 *addr)
4522 {
4523         struct i802_bss *bss = priv;
4524         struct wpa_driver_nl80211_data *drv = bss->drv;
4525         struct nl_msg *msg;
4526
4527         os_memset(data, 0, sizeof(*data));
4528         msg = nlmsg_alloc();
4529         if (!msg)
4530                 return -ENOMEM;
4531
4532         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4533                     0, NL80211_CMD_GET_STATION, 0);
4534
4535         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4536         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4537
4538         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4539  nla_put_failure:
4540         return -ENOBUFS;
4541 }
4542
4543
4544 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4545                                     int cw_min, int cw_max, int burst_time)
4546 {
4547         struct i802_bss *bss = priv;
4548         struct wpa_driver_nl80211_data *drv = bss->drv;
4549         struct nl_msg *msg;
4550         struct nlattr *txq, *params;
4551
4552         msg = nlmsg_alloc();
4553         if (!msg)
4554                 return -1;
4555
4556         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4557                     0, NL80211_CMD_SET_WIPHY, 0);
4558
4559         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4560
4561         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4562         if (!txq)
4563                 goto nla_put_failure;
4564
4565         /* We are only sending parameters for a single TXQ at a time */
4566         params = nla_nest_start(msg, 1);
4567         if (!params)
4568                 goto nla_put_failure;
4569
4570         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4571         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4572          * 32 usec, so need to convert the value here. */
4573         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4574         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4575         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4576         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4577
4578         nla_nest_end(msg, params);
4579
4580         nla_nest_end(msg, txq);
4581
4582         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4583                 return 0;
4584  nla_put_failure:
4585         return -1;
4586 }
4587
4588
4589 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4590 {
4591         struct i802_bss *bss = priv;
4592         struct wpa_driver_nl80211_data *drv = bss->drv;
4593         struct nl_msg *msg;
4594
4595         msg = nlmsg_alloc();
4596         if (!msg)
4597                 return -ENOMEM;
4598
4599         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4600                     NL80211_CMD_SET_BSS, 0);
4601
4602         if (cts >= 0)
4603                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4604         if (preamble >= 0)
4605                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4606         if (slot >= 0)
4607                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4608
4609         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4610
4611         return send_and_recv_msgs(drv, msg, NULL, NULL);
4612  nla_put_failure:
4613         return -ENOBUFS;
4614 }
4615
4616
4617 static int i802_set_cts_protect(void *priv, int value)
4618 {
4619         return i802_set_bss(priv, value, -1, -1);
4620 }
4621
4622
4623 static int i802_set_preamble(void *priv, int value)
4624 {
4625         return i802_set_bss(priv, -1, value, -1);
4626 }
4627
4628
4629 static int i802_set_short_slot_time(void *priv, int value)
4630 {
4631         return i802_set_bss(priv, -1, -1, value);
4632 }
4633
4634
4635 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4636                              const char *ifname, int vlan_id)
4637 {
4638         struct i802_bss *bss = priv;
4639         struct wpa_driver_nl80211_data *drv = bss->drv;
4640         struct nl_msg *msg;
4641         int ret = -ENOBUFS;
4642
4643         msg = nlmsg_alloc();
4644         if (!msg)
4645                 return -ENOMEM;
4646
4647         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4648                     0, NL80211_CMD_SET_STATION, 0);
4649
4650         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4651                     if_nametoindex(bss->ifname));
4652         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4653         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4654                     if_nametoindex(ifname));
4655
4656         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4657         if (ret < 0) {
4658                 wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
4659                            MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
4660                            MAC2STR(addr), ifname, vlan_id, ret,
4661                            strerror(-ret));
4662         }
4663  nla_put_failure:
4664         return ret;
4665 }
4666
4667
4668 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4669 {
4670         struct i802_bss *bss = priv;
4671         struct wpa_driver_nl80211_data *drv = bss->drv;
4672         char name[IFNAMSIZ + 1];
4673
4674         os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
4675         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4676                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4677         if (val) {
4678                 if (nl80211_create_iface(drv, name, NL80211_IFTYPE_AP_VLAN,
4679                                          NULL, 1) < 0)
4680                         return -1;
4681                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4682                 return i802_set_sta_vlan(priv, addr, name, 0);
4683         } else {
4684                 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
4685                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4686                                                     name);
4687         }
4688 }
4689
4690
4691 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4692 {
4693         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4694         struct sockaddr_ll lladdr;
4695         unsigned char buf[3000];
4696         int len;
4697         socklen_t fromlen = sizeof(lladdr);
4698
4699         len = recvfrom(sock, buf, sizeof(buf), 0,
4700                        (struct sockaddr *)&lladdr, &fromlen);
4701         if (len < 0) {
4702                 perror("recv");
4703                 return;
4704         }
4705
4706         if (have_ifidx(drv, lladdr.sll_ifindex))
4707                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4708 }
4709
4710
4711 static int i802_get_inact_sec(void *priv, const u8 *addr)
4712 {
4713         struct hostap_sta_driver_data data;
4714         int ret;
4715
4716         data.inactive_msec = (unsigned long) -1;
4717         ret = i802_read_sta_data(priv, &data, addr);
4718         if (ret || data.inactive_msec == (unsigned long) -1)
4719                 return -1;
4720         return data.inactive_msec / 1000;
4721 }
4722
4723
4724 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4725 {
4726 #if 0
4727         /* TODO */
4728 #endif
4729         return 0;
4730 }
4731
4732
4733 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4734                            int reason)
4735 {
4736         struct i802_bss *bss = priv;
4737         struct ieee80211_mgmt mgmt;
4738
4739         memset(&mgmt, 0, sizeof(mgmt));
4740         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4741                                           WLAN_FC_STYPE_DEAUTH);
4742         memcpy(mgmt.da, addr, ETH_ALEN);
4743         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4744         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4745         mgmt.u.deauth.reason_code = host_to_le16(reason);
4746         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4747                                             IEEE80211_HDRLEN +
4748                                             sizeof(mgmt.u.deauth));
4749 }
4750
4751
4752 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4753                              int reason)
4754 {
4755         struct i802_bss *bss = priv;
4756         struct ieee80211_mgmt mgmt;
4757
4758         memset(&mgmt, 0, sizeof(mgmt));
4759         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4760                                           WLAN_FC_STYPE_DISASSOC);
4761         memcpy(mgmt.da, addr, ETH_ALEN);
4762         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4763         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4764         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4765         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4766                                             IEEE80211_HDRLEN +
4767                                             sizeof(mgmt.u.disassoc));
4768 }
4769
4770
4771 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4772                              const char *brname, const char *ifname)
4773 {
4774         int ifindex;
4775         char in_br[IFNAMSIZ];
4776
4777         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4778         ifindex = if_nametoindex(brname);
4779         if (ifindex == 0) {
4780                 /*
4781                  * Bridge was configured, but the bridge device does
4782                  * not exist. Try to add it now.
4783                  */
4784                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4785                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4786                                    "bridge interface %s: %s",
4787                                    brname, strerror(errno));
4788                         return -1;
4789                 }
4790                 drv->added_bridge = 1;
4791                 add_ifidx(drv, if_nametoindex(brname));
4792         }
4793
4794         if (linux_br_get(in_br, ifname) == 0) {
4795                 if (os_strcmp(in_br, brname) == 0)
4796                         return 0; /* already in the bridge */
4797
4798                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4799                            "bridge %s", ifname, in_br);
4800                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4801                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4802                                    "remove interface %s from bridge "
4803                                    "%s: %s",
4804                                    ifname, brname, strerror(errno));
4805                         return -1;
4806                 }
4807         }
4808
4809         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4810                    ifname, brname);
4811         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4812                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4813                            "into bridge %s: %s",
4814                            ifname, brname, strerror(errno));
4815                 return -1;
4816         }
4817         drv->added_if_into_bridge = 1;
4818
4819         return 0;
4820 }
4821
4822
4823 static void *i802_init(struct hostapd_data *hapd,
4824                        struct wpa_init_params *params)
4825 {
4826         struct wpa_driver_nl80211_data *drv;
4827         struct i802_bss *bss;
4828         size_t i;
4829         char brname[IFNAMSIZ];
4830         int ifindex, br_ifindex;
4831         int br_added = 0;
4832
4833         bss = wpa_driver_nl80211_init(hapd, params->ifname);
4834         if (bss == NULL)
4835                 return NULL;
4836
4837         drv = bss->drv;
4838         if (linux_br_get(brname, params->ifname) == 0) {
4839                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4840                            params->ifname, brname);
4841                 br_ifindex = if_nametoindex(brname);
4842         } else {
4843                 brname[0] = '\0';
4844                 br_ifindex = 0;
4845         }
4846
4847         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4848         drv->if_indices = drv->default_if_indices;
4849         for (i = 0; i < params->num_bridge; i++) {
4850                 if (params->bridge[i]) {
4851                         ifindex = if_nametoindex(params->bridge[i]);
4852                         if (ifindex)
4853                                 add_ifidx(drv, ifindex);
4854                         if (ifindex == br_ifindex)
4855                                 br_added = 1;
4856                 }
4857         }
4858         if (!br_added && br_ifindex &&
4859             (params->num_bridge == 0 || !params->bridge[0]))
4860                 add_ifidx(drv, br_ifindex);
4861
4862         /* start listening for EAPOL on the default AP interface */
4863         add_ifidx(drv, drv->ifindex);
4864
4865         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
4866                 goto failed;
4867
4868         if (params->bssid) {
4869                 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
4870                                        params->bssid))
4871                         goto failed;
4872         }
4873
4874         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
4875                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4876                            "into AP mode", bss->ifname);
4877                 goto failed;
4878         }
4879
4880         if (params->num_bridge && params->bridge[0] &&
4881             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
4882                 goto failed;
4883
4884         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
4885                 goto failed;
4886
4887         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4888         if (drv->eapol_sock < 0) {
4889                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4890                 goto failed;
4891         }
4892
4893         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4894         {
4895                 printf("Could not register read socket for eapol\n");
4896                 goto failed;
4897         }
4898
4899         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
4900                 goto failed;
4901
4902         return bss;
4903
4904 failed:
4905         nl80211_remove_monitor_interface(drv);
4906         if (drv->ioctl_sock >= 0)
4907                 close(drv->ioctl_sock);
4908
4909         genl_family_put(drv->nl80211);
4910         nl_cache_free(drv->nl_cache);
4911         nl_handle_destroy(drv->nl_handle);
4912         nl_cb_put(drv->nl_cb);
4913
4914         os_free(drv);
4915         return NULL;
4916 }
4917
4918
4919 static void i802_deinit(void *priv)
4920 {
4921         wpa_driver_nl80211_deinit(priv);
4922 }
4923
4924 #endif /* HOSTAPD */
4925
4926
4927 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4928         enum wpa_driver_if_type type)
4929 {
4930         switch (type) {
4931         case WPA_IF_STATION:
4932                 return NL80211_IFTYPE_STATION;
4933         case WPA_IF_AP_VLAN:
4934                 return NL80211_IFTYPE_AP_VLAN;
4935         case WPA_IF_AP_BSS:
4936                 return NL80211_IFTYPE_AP;
4937         }
4938         return -1;
4939 }
4940
4941
4942 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
4943                                      const char *ifname, const u8 *addr,
4944                                      void *bss_ctx, void **drv_priv,
4945                                      char *force_ifname, u8 *if_addr)
4946 {
4947         struct i802_bss *bss = priv;
4948         struct wpa_driver_nl80211_data *drv = bss->drv;
4949         int ifidx;
4950 #ifdef HOSTAPD
4951         struct i802_bss *new_bss = NULL;
4952
4953         if (type == WPA_IF_AP_BSS) {
4954                 new_bss = os_zalloc(sizeof(*new_bss));
4955                 if (new_bss == NULL)
4956                         return -1;
4957         }
4958 #endif /* HOSTAPD */
4959
4960         if (addr)
4961                 os_memcpy(if_addr, addr, ETH_ALEN);
4962         ifidx = nl80211_create_iface(drv, ifname,
4963                                      wpa_driver_nl80211_if_type(type), addr,
4964                                      0);
4965         if (ifidx < 0) {
4966 #ifdef HOSTAPD
4967                 os_free(new_bss);
4968 #endif /* HOSTAPD */
4969                 return -1;
4970         }
4971
4972         if (!addr &&
4973             linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0)
4974                 return -1;
4975
4976 #ifdef HOSTAPD
4977         if (type == WPA_IF_AP_BSS) {
4978                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
4979                         nl80211_remove_iface(drv, ifidx);
4980                         os_free(new_bss);
4981                         return -1;
4982                 }
4983                 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
4984                 new_bss->ifindex = ifidx;
4985                 new_bss->drv = drv;
4986                 new_bss->next = drv->first_bss.next;
4987                 drv->first_bss.next = new_bss;
4988                 if (drv_priv)
4989                         *drv_priv = new_bss;
4990         }
4991 #endif /* HOSTAPD */
4992
4993         return 0;
4994 }
4995
4996
4997 static int wpa_driver_nl80211_if_remove(void *priv,
4998                                         enum wpa_driver_if_type type,
4999                                         const char *ifname)
5000 {
5001         struct i802_bss *bss = priv;
5002         struct wpa_driver_nl80211_data *drv = bss->drv;
5003         int ifindex = if_nametoindex(ifname);
5004
5005         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
5006                    __func__, type, ifname, ifindex);
5007         if (ifindex <= 0)
5008                 return -1;
5009         nl80211_remove_iface(drv, ifindex);
5010
5011 #ifdef HOSTAPD
5012         if (type != WPA_IF_AP_BSS)
5013                 return 0;
5014
5015         if (bss != &drv->first_bss) {
5016                 struct i802_bss *tbss = &drv->first_bss;
5017
5018                 while (tbss) {
5019                         if (tbss->next != bss)
5020                                 continue;
5021
5022                         tbss->next = bss->next;
5023                         os_free(bss);
5024                         break;
5025                 }
5026         }
5027 #endif /* HOSTAPD */
5028
5029         return 0;
5030 }
5031
5032
5033 static int cookie_handler(struct nl_msg *msg, void *arg)
5034 {
5035         struct nlattr *tb[NL80211_ATTR_MAX + 1];
5036         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5037         u64 *cookie = arg;
5038         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
5039                   genlmsg_attrlen(gnlh, 0), NULL);
5040         if (tb[NL80211_ATTR_COOKIE])
5041                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
5042         return NL_SKIP;
5043 }
5044
5045
5046 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
5047                                           const u8 *dst, const u8 *src,
5048                                           const u8 *bssid,
5049                                           const u8 *data, size_t data_len)
5050 {
5051         struct i802_bss *bss = priv;
5052         struct wpa_driver_nl80211_data *drv = bss->drv;
5053         int ret = -1;
5054         struct nl_msg *msg;
5055         u8 *buf;
5056         struct ieee80211_hdr *hdr;
5057         u64 cookie;
5058
5059         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
5060                    drv->ifindex);
5061
5062         buf = os_zalloc(24 + data_len);
5063         if (buf == NULL)
5064                 return ret;
5065         os_memcpy(buf + 24, data, data_len);
5066         hdr = (struct ieee80211_hdr *) buf;
5067         hdr->frame_control =
5068                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
5069         os_memcpy(hdr->addr1, dst, ETH_ALEN);
5070         os_memcpy(hdr->addr2, src, ETH_ALEN);
5071         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
5072
5073         if (drv->nlmode == NL80211_IFTYPE_AP) {
5074                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
5075                 os_free(buf);
5076                 return ret;
5077         }
5078
5079         msg = nlmsg_alloc();
5080         if (!msg) {
5081                 os_free(buf);
5082                 return -1;
5083         }
5084
5085         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5086                     NL80211_CMD_ACTION, 0);
5087
5088         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5089         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5090         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
5091         os_free(buf);
5092         buf = NULL;
5093
5094         cookie = 0;
5095         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5096         msg = NULL;
5097         if (ret) {
5098                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
5099                            "(%s)", ret, strerror(-ret));
5100                 goto nla_put_failure;
5101         }
5102         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
5103                    "cookie 0x%llx", (long long unsigned int) cookie);
5104         drv->send_action_cookie = cookie;
5105         ret = 0;
5106
5107 nla_put_failure:
5108         os_free(buf);
5109         nlmsg_free(msg);
5110         return ret;
5111 }
5112
5113
5114 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
5115                                                 unsigned int duration)
5116 {
5117         struct i802_bss *bss = priv;
5118         struct wpa_driver_nl80211_data *drv = bss->drv;
5119         struct nl_msg *msg;
5120         int ret;
5121         u64 cookie;
5122
5123         msg = nlmsg_alloc();
5124         if (!msg)
5125                 return -1;
5126
5127         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5128                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
5129
5130         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5131         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5132         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5133
5134         cookie = 0;
5135         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5136         if (ret == 0) {
5137                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
5138                            "0x%llx for freq=%u MHz duration=%u",
5139                            (long long unsigned int) cookie, freq, duration);
5140                 drv->remain_on_chan_cookie = cookie;
5141                 return 0;
5142         }
5143         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
5144                    "(freq=%d duration=%u): %d (%s)",
5145                    freq, duration, ret, strerror(-ret));
5146 nla_put_failure:
5147         return -1;
5148 }
5149
5150
5151 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
5152 {
5153         struct i802_bss *bss = priv;
5154         struct wpa_driver_nl80211_data *drv = bss->drv;
5155         struct nl_msg *msg;
5156         int ret;
5157
5158         if (!drv->pending_remain_on_chan) {
5159                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
5160                            "to cancel");
5161                 return -1;
5162         }
5163
5164         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
5165                    "0x%llx",
5166                    (long long unsigned int) drv->remain_on_chan_cookie);
5167
5168         msg = nlmsg_alloc();
5169         if (!msg)
5170                 return -1;
5171
5172         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5173                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
5174
5175         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5176         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
5177
5178         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5179         if (ret == 0)
5180                 return 0;
5181         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
5182                    "%d (%s)", ret, strerror(-ret));
5183 nla_put_failure:
5184         return -1;
5185 }
5186
5187
5188 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
5189                                                         void *timeout_ctx)
5190 {
5191         struct wpa_driver_nl80211_data *drv = eloop_ctx;
5192         if (drv->monitor_ifidx < 0)
5193                 return; /* monitor interface already removed */
5194
5195         if (drv->nlmode != NL80211_IFTYPE_STATION)
5196                 return; /* not in station mode anymore */
5197
5198         if (drv->probe_req_report)
5199                 return; /* reporting enabled */
5200
5201         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
5202                    "Probe Request reporting needed anymore");
5203         nl80211_remove_monitor_interface(drv);
5204 }
5205
5206
5207 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
5208 {
5209         struct i802_bss *bss = priv;
5210         struct wpa_driver_nl80211_data *drv = bss->drv;
5211
5212         if (drv->nlmode != NL80211_IFTYPE_STATION) {
5213                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
5214                            "allowed in station mode (iftype=%d)",
5215                            drv->nlmode);
5216                 return -1;
5217         }
5218         drv->probe_req_report = report;
5219
5220         if (report) {
5221                 eloop_cancel_timeout(
5222                         wpa_driver_nl80211_probe_req_report_timeout,
5223                         drv, NULL);
5224                 if (drv->monitor_ifidx < 0 &&
5225                     nl80211_create_monitor_interface(drv))
5226                         return -1;
5227         } else {
5228                 /*
5229                  * It takes a while to remove the monitor interface, so try to
5230                  * avoid doing this if it is needed again shortly. Instead,
5231                  * schedule the interface to be removed later if no need for it
5232                  * is seen.
5233                  */
5234                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
5235                            "to be removed after 10 seconds of no use");
5236                 eloop_register_timeout(
5237                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
5238                         drv, NULL);
5239         }
5240
5241         return 0;
5242 }
5243
5244
5245 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5246                                      int ifindex, int disabled)
5247 {
5248         struct nl_msg *msg;
5249         struct nlattr *bands, *band;
5250         int ret;
5251
5252         msg = nlmsg_alloc();
5253         if (!msg)
5254                 return -1;
5255
5256         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5257                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5258         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5259
5260         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5261         if (!bands)
5262                 goto nla_put_failure;
5263
5264         /*
5265          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5266          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5267          * rates. All 5 GHz rates are left enabled.
5268          */
5269         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5270         if (!band)
5271                 goto nla_put_failure;
5272         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5273                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5274         nla_nest_end(msg, band);
5275
5276         nla_nest_end(msg, bands);
5277
5278         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5279         msg = NULL;
5280         if (ret) {
5281                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5282                            "(%s)", ret, strerror(-ret));
5283         }
5284
5285         return ret;
5286
5287 nla_put_failure:
5288         nlmsg_free(msg);
5289         return -1;
5290 }
5291
5292
5293 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5294 {
5295         struct i802_bss *bss = priv;
5296         struct wpa_driver_nl80211_data *drv = bss->drv;
5297         drv->disable_11b_rates = disabled;
5298         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5299 }
5300
5301
5302 static int wpa_driver_nl80211_deinit_ap(void *priv)
5303 {
5304         struct i802_bss *bss = priv;
5305         struct wpa_driver_nl80211_data *drv = bss->drv;
5306         if (drv->nlmode != NL80211_IFTYPE_AP)
5307                 return -1;
5308         wpa_driver_nl80211_del_beacon(drv);
5309         return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
5310 }
5311
5312
5313 static void wpa_driver_nl80211_resume(void *priv)
5314 {
5315         struct i802_bss *bss = priv;
5316         struct wpa_driver_nl80211_data *drv = bss->drv;
5317         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
5318                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5319                            "resume event");
5320         }
5321 }
5322
5323
5324 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
5325                                   const u8 *ies, size_t ies_len)
5326 {
5327         struct i802_bss *bss = priv;
5328         struct wpa_driver_nl80211_data *drv = bss->drv;
5329         int ret;
5330         u8 *data, *pos;
5331         size_t data_len;
5332         u8 own_addr[ETH_ALEN];
5333
5334         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
5335                 return -1;
5336
5337         if (action != 1) {
5338                 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
5339                            "action %d", action);
5340                 return -1;
5341         }
5342
5343         /*
5344          * Action frame payload:
5345          * Category[1] = 6 (Fast BSS Transition)
5346          * Action[1] = 1 (Fast BSS Transition Request)
5347          * STA Address
5348          * Target AP Address
5349          * FT IEs
5350          */
5351
5352         data_len = 2 + 2 * ETH_ALEN + ies_len;
5353         data = os_malloc(data_len);
5354         if (data == NULL)
5355                 return -1;
5356         pos = data;
5357         *pos++ = 0x06; /* FT Action category */
5358         *pos++ = action;
5359         os_memcpy(pos, own_addr, ETH_ALEN);
5360         pos += ETH_ALEN;
5361         os_memcpy(pos, target_ap, ETH_ALEN);
5362         pos += ETH_ALEN;
5363         os_memcpy(pos, ies, ies_len);
5364
5365         ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
5366                                              own_addr, drv->bssid,
5367                                              data, data_len);
5368         os_free(data);
5369
5370         return ret;
5371 }
5372
5373
5374 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
5375 {
5376         struct i802_bss *bss = priv;
5377         struct wpa_driver_nl80211_data *drv = bss->drv;
5378         struct nl_msg *msg, *cqm = NULL;
5379
5380         wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
5381                    "hysteresis=%d", threshold, hysteresis);
5382
5383         msg = nlmsg_alloc();
5384         if (!msg)
5385                 return -1;
5386
5387         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5388                     0, NL80211_CMD_SET_CQM, 0);
5389
5390         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
5391
5392         cqm = nlmsg_alloc();
5393         if (cqm == NULL)
5394                 return -1;
5395
5396         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
5397         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
5398         nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
5399
5400         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
5401                 return 0;
5402         msg = NULL;
5403
5404 nla_put_failure:
5405         if (cqm)
5406                 nlmsg_free(cqm);
5407         nlmsg_free(msg);
5408         return -1;
5409 }
5410
5411
5412 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
5413                               int encrypt)
5414 {
5415         struct i802_bss *bss = priv;
5416         struct wpa_driver_nl80211_data *drv = bss->drv;
5417         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
5418 }
5419
5420
5421 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5422         .name = "nl80211",
5423         .desc = "Linux nl80211/cfg80211",
5424         .get_bssid = wpa_driver_nl80211_get_bssid,
5425         .get_ssid = wpa_driver_nl80211_get_ssid,
5426         .set_key = wpa_driver_nl80211_set_key,
5427         .scan2 = wpa_driver_nl80211_scan,
5428         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5429         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5430         .disassociate = wpa_driver_nl80211_disassociate,
5431         .authenticate = wpa_driver_nl80211_authenticate,
5432         .associate = wpa_driver_nl80211_associate,
5433         .init = wpa_driver_nl80211_init,
5434         .deinit = wpa_driver_nl80211_deinit,
5435         .get_capa = wpa_driver_nl80211_get_capa,
5436         .set_operstate = wpa_driver_nl80211_set_operstate,
5437         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5438         .set_country = wpa_driver_nl80211_set_country,
5439         .set_beacon = wpa_driver_nl80211_set_beacon,
5440         .if_add = wpa_driver_nl80211_if_add,
5441         .if_remove = wpa_driver_nl80211_if_remove,
5442         .send_mlme = wpa_driver_nl80211_send_mlme,
5443         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5444         .sta_add = wpa_driver_nl80211_sta_add,
5445         .sta_remove = wpa_driver_nl80211_sta_remove,
5446         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5447         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5448 #ifdef HOSTAPD
5449         .hapd_init = i802_init,
5450         .hapd_deinit = i802_deinit,
5451         .get_seqnum = i802_get_seqnum,
5452         .flush = i802_flush,
5453         .read_sta_data = i802_read_sta_data,
5454         .sta_deauth = i802_sta_deauth,
5455         .sta_disassoc = i802_sta_disassoc,
5456         .get_inact_sec = i802_get_inact_sec,
5457         .sta_clear_stats = i802_sta_clear_stats,
5458         .set_rts = i802_set_rts,
5459         .set_frag = i802_set_frag,
5460         .set_rate_sets = i802_set_rate_sets,
5461         .set_cts_protect = i802_set_cts_protect,
5462         .set_preamble = i802_set_preamble,
5463         .set_short_slot_time = i802_set_short_slot_time,
5464         .set_tx_queue_params = i802_set_tx_queue_params,
5465         .set_sta_vlan = i802_set_sta_vlan,
5466         .set_wds_sta = i802_set_wds_sta,
5467 #endif /* HOSTAPD */
5468         .set_freq = i802_set_freq,
5469         .send_action = wpa_driver_nl80211_send_action,
5470         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5471         .cancel_remain_on_channel =
5472         wpa_driver_nl80211_cancel_remain_on_channel,
5473         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5474         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5475         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5476         .resume = wpa_driver_nl80211_resume,
5477         .send_ft_action = nl80211_send_ft_action,
5478         .signal_monitor = nl80211_signal_monitor,
5479         .send_frame = nl80211_send_frame,
5480 };