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