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 <sys/types.h>
  22 #include <sys/stat.h>
  23 #include <fcntl.h>
  24 #include <net/if.h>
  25 #include <netlink/genl/genl.h>
  26 #include <netlink/genl/family.h>
  27 #include <netlink/genl/ctrl.h>
  28 #include <linux/rtnetlink.h>
  29 #include <netpacket/packet.h>
  30 #include <linux/filter.h>
  31 #include "nl80211_copy.h"
  32
  33 #include "common.h"
  34 #include "eloop.h"
  35 #include "utils/list.h"
  36 #include "common/ieee802_11_defs.h"
  37 #include "netlink.h"
  38 #include "linux_ioctl.h"
  39 #include "radiotap.h"
  40 #include "radiotap_iter.h"
  41 #include "rfkill.h"
  42 #include "driver.h"
  43
  44 #ifdef CONFIG_LIBNL20
  45 /* libnl 2.0 compatibility code */
  46 #define nl_handle nl_sock
  47 #define nl80211_handle_alloc nl_socket_alloc_cb
  48 #define nl80211_handle_destroy nl_socket_free
  49 #else
  50 /*
  51  * libnl 1.1 has a bug, it tries to allocate socket numbers densely
  52  * but when you free a socket again it will mess up its bitmap and
  53  * and use the wrong number the next time it needs a socket ID.
  54  * Therefore, we wrap the handle alloc/destroy and add our own pid
  55  * accounting.
  56  */
  57 static uint32_t port_bitmap[32] = { 0 };
  58
  59 static struct nl_handle *nl80211_handle_alloc(void *cb)
  60 {
  61         struct nl_handle *handle;
  62         uint32_t pid = getpid() & 0x3FFFFF;
  63         int i;
  64
  65         handle = nl_handle_alloc_cb(cb);
  66
  67         for (i = 0; i < 1024; i++) {
  68                 if (port_bitmap[i / 32] & (1 << (i % 32)))
  69                         continue;
  70                 port_bitmap[i / 32] |= 1 << (i % 32);
  71                 pid += i << 22;
  72                 break;
  73         }
  74
  75         nl_socket_set_local_port(handle, pid);
  76
  77         return handle;
  78 }
  79
  80 static void nl80211_handle_destroy(struct nl_handle *handle)
  81 {
  82         uint32_t port = nl_socket_get_local_port(handle);
  83
  84         port >>= 22;
  85         port_bitmap[port / 32] &= ~(1 << (port % 32));
  86
  87         nl_handle_destroy(handle);
  88 }
  89 #endif /* CONFIG_LIBNL20 */
  90
  91
  92 #ifndef IFF_LOWER_UP
  93 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  94 #endif
  95 #ifndef IFF_DORMANT
  96 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  97 #endif
  98
  99 #ifndef IF_OPER_DORMANT
 100 #define IF_OPER_DORMANT 5
 101 #endif
 102 #ifndef IF_OPER_UP
 103 #define IF_OPER_UP 6
 104 #endif
 105
 106 struct nl80211_global {
 107         struct dl_list interfaces;
 108 };
 109
 110 struct i802_bss {
 111         struct wpa_driver_nl80211_data *drv;
 112         struct i802_bss *next;
 113         int ifindex;
 114         char ifname[IFNAMSIZ + 1];
 115         unsigned int beacon_set:1;
 116 };
 117
 118 struct wpa_driver_nl80211_data {
 119         struct nl80211_global *global;
 120         struct dl_list list;
 121         u8 addr[ETH_ALEN];
 122         char phyname[32];
 123         void *ctx;
 124         struct netlink_data *netlink;
 125         int ioctl_sock; /* socket for ioctl() use */
 126         char brname[IFNAMSIZ];
 127         int ifindex;
 128         int if_removed;
 129         int if_disabled;
 130         struct rfkill_data *rfkill;
 131         struct wpa_driver_capa capa;
 132         int has_capability;
 133
 134         int operstate;
 135
 136         int scan_complete_events;
 137
 138         struct nl_handle *nl_handle;
 139         struct nl_handle *nl_handle_event;
 140         struct nl_handle *nl_handle_preq;
 141         struct nl_cache *nl_cache;
 142         struct nl_cache *nl_cache_event;
 143         struct nl_cache *nl_cache_preq;
 144         struct nl_cb *nl_cb;
 145         struct genl_family *nl80211;
 146
 147         u8 auth_bssid[ETH_ALEN];
 148         u8 bssid[ETH_ALEN];
 149         int associated;
 150         u8 ssid[32];
 151         size_t ssid_len;
 152         int nlmode;
 153         int ap_scan_as_station;
 154         unsigned int assoc_freq;
 155
 156         int monitor_sock;
 157         int monitor_ifidx;
 158         int disable_11b_rates;
 159
 160         unsigned int pending_remain_on_chan:1;
 161         unsigned int added_bridge:1;
 162         unsigned int added_if_into_bridge:1;
 163
 164         u64 remain_on_chan_cookie;
 165         u64 send_action_cookie;
 166
 167         unsigned int last_mgmt_freq;
 168
 169         struct wpa_driver_scan_filter *filter_ssids;
 170         size_t num_filter_ssids;
 171
 172         struct i802_bss first_bss;
 173
 174 #ifdef HOSTAPD
 175         int eapol_sock; /* socket for EAPOL frames */
 176
 177         int default_if_indices[16];
 178         int *if_indices;
 179         int num_if_indices;
 180
 181         int last_freq;
 182         int last_freq_ht;
 183 #endif /* HOSTAPD */
 184 };
 185
 186
 187 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 188                                             void *timeout_ctx);
 189 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 190 static int
 191 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 192 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 193                                    const u8 *addr, int cmd, u16 reason_code,
 194                                    int local_state_change);
 195 static void nl80211_remove_monitor_interface(
 196         struct wpa_driver_nl80211_data *drv);
 197 static int nl80211_send_frame_cmd(struct wpa_driver_nl80211_data *drv,
 198                                   unsigned int freq, const u8 *buf,
 199                                   size_t buf_len, u64 *cookie);
 200 static int wpa_driver_nl80211_probe_req_report(void *priv, int report);
 201
 202 #ifdef HOSTAPD
 203 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 204 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 205 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 206 static int wpa_driver_nl80211_if_remove(void *priv,
 207                                         enum wpa_driver_if_type type,
 208                                         const char *ifname);
 209 #else /* HOSTAPD */
 210 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
 211 {
 212         return 0;
 213 }
 214 #endif /* HOSTAPD */
 215
 216 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 217 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
 218                                      int ifindex, int disabled);
 219
 220
 221 /* nl80211 code */
 222 static int ack_handler(struct nl_msg *msg, void *arg)
 223 {
 224         int *err = arg;
 225         *err = 0;
 226         return NL_STOP;
 227 }
 228
 229 static int finish_handler(struct nl_msg *msg, void *arg)
 230 {
 231         int *ret = arg;
 232         *ret = 0;
 233         return NL_SKIP;
 234 }
 235
 236 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 237                          void *arg)
 238 {
 239         int *ret = arg;
 240         *ret = err->error;
 241         return NL_SKIP;
 242 }
 243
 244
 245 static int no_seq_check(struct nl_msg *msg, void *arg)
 246 {
 247         return NL_OK;
 248 }
 249
 250
 251 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
 252                          struct nl_handle *nl_handle, struct nl_msg *msg,
 253                          int (*valid_handler)(struct nl_msg *, void *),
 254                          void *valid_data)
 255 {
 256         struct nl_cb *cb;
 257         int err = -ENOMEM;
 258
 259         cb = nl_cb_clone(drv->nl_cb);
 260         if (!cb)
 261                 goto out;
 262
 263         err = nl_send_auto_complete(nl_handle, msg);
 264         if (err < 0)
 265                 goto out;
 266
 267         err = 1;
 268
 269         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 270         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 271         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 272
 273         if (valid_handler)
 274                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 275                           valid_handler, valid_data);
 276
 277         while (err > 0)
 278                 nl_recvmsgs(nl_handle, cb);
 279  out:
 280         nl_cb_put(cb);
 281         nlmsg_free(msg);
 282         return err;
 283 }
 284
 285
 286 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 287                               struct nl_msg *msg,
 288                               int (*valid_handler)(struct nl_msg *, void *),
 289                               void *valid_data)
 290 {
 291         return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
 292                              valid_data);
 293 }
 294
 295
 296 struct family_data {
 297         const char *group;
 298         int id;
 299 };
 300
 301
 302 static int family_handler(struct nl_msg *msg, void *arg)
 303 {
 304         struct family_data *res = arg;
 305         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 306         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 307         struct nlattr *mcgrp;
 308         int i;
 309
 310         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 311                   genlmsg_attrlen(gnlh, 0), NULL);
 312         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 313                 return NL_SKIP;
 314
 315         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 316                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 317                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 318                           nla_len(mcgrp), NULL);
 319                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 320                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 321                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 322                                res->group,
 323                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 324                         continue;
 325                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 326                 break;
 327         };
 328
 329         return NL_SKIP;
 330 }
 331
 332
 333 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 334                                const char *family, const char *group)
 335 {
 336         struct nl_msg *msg;
 337         int ret = -1;
 338         struct family_data res = { group, -ENOENT };
 339
 340         msg = nlmsg_alloc();
 341         if (!msg)
 342                 return -ENOMEM;
 343         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 344                     0, 0, CTRL_CMD_GETFAMILY, 0);
 345         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 346
 347         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 348         msg = NULL;
 349         if (ret == 0)
 350                 ret = res.id;
 351
 352 nla_put_failure:
 353         nlmsg_free(msg);
 354         return ret;
 355 }
 356
 357
 358 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 359 {
 360         struct i802_bss *bss = priv;
 361         struct wpa_driver_nl80211_data *drv = bss->drv;
 362         if (!drv->associated)
 363                 return -1;
 364         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 365         return 0;
 366 }
 367
 368
 369 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 370 {
 371         struct i802_bss *bss = priv;
 372         struct wpa_driver_nl80211_data *drv = bss->drv;
 373         if (!drv->associated)
 374                 return -1;
 375         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 376         return drv->ssid_len;
 377 }
 378
 379
 380 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 381                                           char *buf, size_t len, int del)
 382 {
 383         union wpa_event_data event;
 384
 385         os_memset(&event, 0, sizeof(event));
 386         if (len > sizeof(event.interface_status.ifname))
 387                 len = sizeof(event.interface_status.ifname) - 1;
 388         os_memcpy(event.interface_status.ifname, buf, len);
 389         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 390                 EVENT_INTERFACE_ADDED;
 391
 392         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 393                    del ? "DEL" : "NEW",
 394                    event.interface_status.ifname,
 395                    del ? "removed" : "added");
 396
 397         if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
 398                 if (del)
 399                         drv->if_removed = 1;
 400                 else
 401                         drv->if_removed = 0;
 402         }
 403
 404         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 405 }
 406
 407
 408 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 409                                          u8 *buf, size_t len)
 410 {
 411         int attrlen, rta_len;
 412         struct rtattr *attr;
 413
 414         attrlen = len;
 415         attr = (struct rtattr *) buf;
 416
 417         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 418         while (RTA_OK(attr, attrlen)) {
 419                 if (attr->rta_type == IFLA_IFNAME) {
 420                         if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
 421                             == 0)
 422                                 return 1;
 423                         else
 424                                 break;
 425                 }
 426                 attr = RTA_NEXT(attr, attrlen);
 427         }
 428
 429         return 0;
 430 }
 431
 432
 433 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 434                                           int ifindex, u8 *buf, size_t len)
 435 {
 436         if (drv->ifindex == ifindex)
 437                 return 1;
 438
 439         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 440                 drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
 441                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 442                            "interface");
 443                 wpa_driver_nl80211_finish_drv_init(drv);
 444                 return 1;
 445         }
 446
 447         return 0;
 448 }
 449
 450
 451 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 452                                                  struct ifinfomsg *ifi,
 453                                                  u8 *buf, size_t len)
 454 {
 455         struct wpa_driver_nl80211_data *drv = ctx;
 456         int attrlen, rta_len;
 457         struct rtattr *attr;
 458         u32 brid = 0;
 459
 460         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len) &&
 461             !have_ifidx(drv, ifi->ifi_index)) {
 462                 wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
 463                            "ifindex %d", ifi->ifi_index);
 464                 return;
 465         }
 466
 467         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 468                    "(%s%s%s%s)",
 469                    drv->operstate, ifi->ifi_flags,
 470                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 471                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 472                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 473                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 474
 475         if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
 476                 wpa_printf(MSG_DEBUG, "nl80211: Interface down");
 477                 drv->if_disabled = 1;
 478                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
 479         }
 480
 481         if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
 482                 wpa_printf(MSG_DEBUG, "nl80211: Interface up");
 483                 drv->if_disabled = 0;
 484                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
 485         }
 486
 487         /*
 488          * Some drivers send the association event before the operup event--in
 489          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 490          * fails. This will hit us when wpa_supplicant does not need to do
 491          * IEEE 802.1X authentication
 492          */
 493         if (drv->operstate == 1 &&
 494             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 495             !(ifi->ifi_flags & IFF_RUNNING))
 496                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 497                                        -1, IF_OPER_UP);
 498
 499         attrlen = len;
 500         attr = (struct rtattr *) buf;
 501         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 502         while (RTA_OK(attr, attrlen)) {
 503                 if (attr->rta_type == IFLA_IFNAME) {
 504                         wpa_driver_nl80211_event_link(
 505                                 drv,
 506                                 ((char *) attr) + rta_len,
 507                                 attr->rta_len - rta_len, 0);
 508                 } else if (attr->rta_type == IFLA_MASTER)
 509                         brid = nla_get_u32((struct nlattr *) attr);
 510                 attr = RTA_NEXT(attr, attrlen);
 511         }
 512
 513 #ifdef HOSTAPD
 514         if (ifi->ifi_family == AF_BRIDGE && brid) {
 515                 /* device has been added to bridge */
 516                 char namebuf[IFNAMSIZ];
 517                 if_indextoname(brid, namebuf);
 518                 wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
 519                            brid, namebuf);
 520                 add_ifidx(drv, brid);
 521         }
 522 #endif /* HOSTAPD */
 523 }
 524
 525
 526 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 527                                                  struct ifinfomsg *ifi,
 528                                                  u8 *buf, size_t len)
 529 {
 530         struct wpa_driver_nl80211_data *drv = ctx;
 531         int attrlen, rta_len;
 532         struct rtattr *attr;
 533         u32 brid = 0;
 534
 535         attrlen = len;
 536         attr = (struct rtattr *) buf;
 537
 538         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 539         while (RTA_OK(attr, attrlen)) {
 540                 if (attr->rta_type == IFLA_IFNAME) {
 541                         wpa_driver_nl80211_event_link(
 542                                 drv,
 543                                 ((char *) attr) + rta_len,
 544                                 attr->rta_len - rta_len, 1);
 545                 } else if (attr->rta_type == IFLA_MASTER)
 546                         brid = nla_get_u32((struct nlattr *) attr);
 547                 attr = RTA_NEXT(attr, attrlen);
 548         }
 549
 550 #ifdef HOSTAPD
 551         if (ifi->ifi_family == AF_BRIDGE && brid) {
 552                 /* device has been removed from bridge */
 553                 char namebuf[IFNAMSIZ];
 554                 if_indextoname(brid, namebuf);
 555                 wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
 556                            "%s", brid, namebuf);
 557                 del_ifidx(drv, brid);
 558         }
 559 #endif /* HOSTAPD */
 560 }
 561
 562
 563 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 564                             const u8 *frame, size_t len)
 565 {
 566         const struct ieee80211_mgmt *mgmt;
 567         union wpa_event_data event;
 568
 569         mgmt = (const struct ieee80211_mgmt *) frame;
 570         if (len < 24 + sizeof(mgmt->u.auth)) {
 571                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 572                            "frame");
 573                 return;
 574         }
 575
 576         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 577         os_memset(&event, 0, sizeof(event));
 578         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 579         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 580         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 581         if (len > 24 + sizeof(mgmt->u.auth)) {
 582                 event.auth.ies = mgmt->u.auth.variable;
 583                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 584         }
 585
 586         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 587 }
 588
 589
 590 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 591                             const u8 *frame, size_t len)
 592 {
 593         const struct ieee80211_mgmt *mgmt;
 594         union wpa_event_data event;
 595         u16 status;
 596
 597         mgmt = (const struct ieee80211_mgmt *) frame;
 598         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 599                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 600                            "frame");
 601                 return;
 602         }
 603
 604         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 605         if (status != WLAN_STATUS_SUCCESS) {
 606                 os_memset(&event, 0, sizeof(event));
 607                 event.assoc_reject.bssid = mgmt->bssid;
 608                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 609                         event.assoc_reject.resp_ies =
 610                                 (u8 *) mgmt->u.assoc_resp.variable;
 611                         event.assoc_reject.resp_ies_len =
 612                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 613                 }
 614                 event.assoc_reject.status_code = status;
 615
 616                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 617                 return;
 618         }
 619
 620         drv->associated = 1;
 621         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 622
 623         os_memset(&event, 0, sizeof(event));
 624         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 625                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 626                 event.assoc_info.resp_ies_len =
 627                         len - 24 - sizeof(mgmt->u.assoc_resp);
 628         }
 629
 630         event.assoc_info.freq = drv->assoc_freq;
 631
 632         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 633 }
 634
 635
 636 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 637                                enum nl80211_commands cmd, struct nlattr *status,
 638                                struct nlattr *addr, struct nlattr *req_ie,
 639                                struct nlattr *resp_ie)
 640 {
 641         union wpa_event_data event;
 642
 643         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 644                 /*
 645                  * Avoid reporting two association events that would confuse
 646                  * the core code.
 647                  */
 648                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 649                            "when using userspace SME", cmd);
 650                 return;
 651         }
 652
 653         os_memset(&event, 0, sizeof(event));
 654         if (cmd == NL80211_CMD_CONNECT &&
 655             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 656                 if (addr)
 657                         event.assoc_reject.bssid = nla_data(addr);
 658                 if (resp_ie) {
 659                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 660                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 661                 }
 662                 event.assoc_reject.status_code = nla_get_u16(status);
 663                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 664                 return;
 665         }
 666
 667         drv->associated = 1;
 668         if (addr)
 669                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 670
 671         if (req_ie) {
 672                 event.assoc_info.req_ies = nla_data(req_ie);
 673                 event.assoc_info.req_ies_len = nla_len(req_ie);
 674         }
 675         if (resp_ie) {
 676                 event.assoc_info.resp_ies = nla_data(resp_ie);
 677                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 678         }
 679
 680         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 681 }
 682
 683
 684 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 685                                enum nl80211_commands cmd, struct nlattr *addr)
 686 {
 687         union wpa_event_data event;
 688         enum wpa_event_type ev;
 689
 690         if (nla_len(addr) != ETH_ALEN)
 691                 return;
 692
 693         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 694                    cmd, MAC2STR((u8 *) nla_data(addr)));
 695
 696         if (cmd == NL80211_CMD_AUTHENTICATE)
 697                 ev = EVENT_AUTH_TIMED_OUT;
 698         else if (cmd == NL80211_CMD_ASSOCIATE)
 699                 ev = EVENT_ASSOC_TIMED_OUT;
 700         else
 701                 return;
 702
 703         os_memset(&event, 0, sizeof(event));
 704         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 705         wpa_supplicant_event(drv->ctx, ev, &event);
 706 }
 707
 708
 709 static void mlme_event_mgmt(struct wpa_driver_nl80211_data *drv,
 710                             struct nlattr *freq, const u8 *frame, size_t len)
 711 {
 712         const struct ieee80211_mgmt *mgmt;
 713         union wpa_event_data event;
 714         u16 fc, stype;
 715
 716         mgmt = (const struct ieee80211_mgmt *) frame;
 717         if (len < 24) {
 718                 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
 719                 return;
 720         }
 721
 722         fc = le_to_host16(mgmt->frame_control);
 723         stype = WLAN_FC_GET_STYPE(fc);
 724
 725         os_memset(&event, 0, sizeof(event));
 726         if (freq) {
 727                 event.rx_action.freq = nla_get_u32(freq);
 728                 drv->last_mgmt_freq = event.rx_action.freq;
 729         }
 730         if (stype == WLAN_FC_STYPE_ACTION) {
 731                 event.rx_action.da = mgmt->da;
 732                 event.rx_action.sa = mgmt->sa;
 733                 event.rx_action.bssid = mgmt->bssid;
 734                 event.rx_action.category = mgmt->u.action.category;
 735                 event.rx_action.data = &mgmt->u.action.category + 1;
 736                 event.rx_action.len = frame + len - event.rx_action.data;
 737                 wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
 738         } else {
 739                 event.rx_mgmt.frame = frame;
 740                 event.rx_mgmt.frame_len = len;
 741                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
 742         }
 743 }
 744
 745
 746 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
 747                                         struct nlattr *cookie, const u8 *frame,
 748                                         size_t len, struct nlattr *ack)
 749 {
 750         union wpa_event_data event;
 751         const struct ieee80211_hdr *hdr;
 752         u16 fc;
 753         u64 cookie_val;
 754
 755         if (!cookie)
 756                 return;
 757
 758         cookie_val = nla_get_u64(cookie);
 759         wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s "
 760                    "(ack=%d)",
 761                    (long long unsigned int) cookie_val,
 762                    cookie_val == drv->send_action_cookie ?
 763                    " (match)" : " (unknown)", ack != NULL);
 764         if (cookie_val != drv->send_action_cookie)
 765                 return;
 766
 767         hdr = (const struct ieee80211_hdr *) frame;
 768         fc = le_to_host16(hdr->frame_control);
 769
 770         os_memset(&event, 0, sizeof(event));
 771         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
 772         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
 773         event.tx_status.dst = hdr->addr1;
 774         event.tx_status.data = frame;
 775         event.tx_status.data_len = len;
 776         event.tx_status.ack = ack != NULL;
 777         wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
 778 }
 779
 780
 781 static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
 782                                        enum wpa_event_type type,
 783                                        const u8 *frame, size_t len)
 784 {
 785         const struct ieee80211_mgmt *mgmt;
 786         union wpa_event_data event;
 787         const u8 *bssid = NULL;
 788         u16 reason_code = 0;
 789
 790         mgmt = (const struct ieee80211_mgmt *) frame;
 791         if (len >= 24) {
 792                 bssid = mgmt->bssid;
 793
 794                 if (drv->associated != 0 &&
 795                     os_memcmp(bssid, drv->bssid, ETH_ALEN) != 0 &&
 796                     os_memcmp(bssid, drv->auth_bssid, ETH_ALEN) != 0) {
 797                         /*
 798                          * We have presumably received this deauth as a
 799                          * response to a clear_state_mismatch() outgoing
 800                          * deauth.  Don't let it take us offline!
 801                          */
 802                         wpa_printf(MSG_DEBUG, "nl80211: Deauth received "
 803                                    "from Unknown BSSID " MACSTR " -- ignoring",
 804                                    MAC2STR(bssid));
 805                         return;
 806                 }
 807         }
 808
 809         drv->associated = 0;
 810         os_memset(&event, 0, sizeof(event));
 811
 812         /* Note: Same offset for Reason Code in both frame subtypes */
 813         if (len >= 24 + sizeof(mgmt->u.deauth))
 814                 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
 815
 816         if (type == EVENT_DISASSOC) {
 817                 event.disassoc_info.addr = bssid;
 818                 event.disassoc_info.reason_code = reason_code;
 819                 if (frame + len > mgmt->u.disassoc.variable) {
 820                         event.disassoc_info.ie = mgmt->u.disassoc.variable;
 821                         event.disassoc_info.ie_len = frame + len -
 822                                 mgmt->u.disassoc.variable;
 823                 }
 824         } else {
 825                 event.deauth_info.addr = bssid;
 826                 event.deauth_info.reason_code = reason_code;
 827                 if (frame + len > mgmt->u.deauth.variable) {
 828                         event.deauth_info.ie = mgmt->u.deauth.variable;
 829                         event.deauth_info.ie_len = frame + len -
 830                                 mgmt->u.deauth.variable;
 831                 }
 832         }
 833
 834         wpa_supplicant_event(drv->ctx, type, &event);
 835 }
 836
 837
 838 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 839                        enum nl80211_commands cmd, struct nlattr *frame,
 840                        struct nlattr *addr, struct nlattr *timed_out,
 841                        struct nlattr *freq, struct nlattr *ack,
 842                        struct nlattr *cookie)
 843 {
 844         if (timed_out && addr) {
 845                 mlme_timeout_event(drv, cmd, addr);
 846                 return;
 847         }
 848
 849         if (frame == NULL) {
 850                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 851                            "data", cmd);
 852                 return;
 853         }
 854
 855         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 856         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 857                     nla_data(frame), nla_len(frame));
 858
 859         switch (cmd) {
 860         case NL80211_CMD_AUTHENTICATE:
 861                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 862                 break;
 863         case NL80211_CMD_ASSOCIATE:
 864                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 865                 break;
 866         case NL80211_CMD_DEAUTHENTICATE:
 867                 mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
 868                                            nla_data(frame), nla_len(frame));
 869                 break;
 870         case NL80211_CMD_DISASSOCIATE:
 871                 mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
 872                                            nla_data(frame), nla_len(frame));
 873                 break;
 874         case NL80211_CMD_FRAME:
 875                 mlme_event_mgmt(drv, freq, nla_data(frame), nla_len(frame));
 876                 break;
 877         case NL80211_CMD_FRAME_TX_STATUS:
 878                 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
 879                                             nla_len(frame), ack);
 880                 break;
 881         default:
 882                 break;
 883         }
 884 }
 885
 886
 887 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 888                                            struct nlattr *tb[])
 889 {
 890         union wpa_event_data data;
 891
 892         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 893         os_memset(&data, 0, sizeof(data));
 894         if (tb[NL80211_ATTR_MAC]) {
 895                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 896                             nla_data(tb[NL80211_ATTR_MAC]),
 897                             nla_len(tb[NL80211_ATTR_MAC]));
 898                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 899         }
 900         if (tb[NL80211_ATTR_KEY_SEQ]) {
 901                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 902                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 903                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 904         }
 905         if (tb[NL80211_ATTR_KEY_TYPE]) {
 906                 enum nl80211_key_type key_type =
 907                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 908                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 909                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 910                         data.michael_mic_failure.unicast = 1;
 911         } else
 912                 data.michael_mic_failure.unicast = 1;
 913
 914         if (tb[NL80211_ATTR_KEY_IDX]) {
 915                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 916                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 917         }
 918
 919         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 920 }
 921
 922
 923 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 924                                  struct nlattr *tb[])
 925 {
 926         if (tb[NL80211_ATTR_MAC] == NULL) {
 927                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 928                            "event");
 929                 return;
 930         }
 931         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 932         drv->associated = 1;
 933         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 934                    MAC2STR(drv->bssid));
 935
 936         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 937 }
 938
 939
 940 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
 941                                          int cancel_event, struct nlattr *tb[])
 942 {
 943         unsigned int freq, chan_type, duration;
 944         union wpa_event_data data;
 945         u64 cookie;
 946
 947         if (tb[NL80211_ATTR_WIPHY_FREQ])
 948                 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 949         else
 950                 freq = 0;
 951
 952         if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
 953                 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 954         else
 955                 chan_type = 0;
 956
 957         if (tb[NL80211_ATTR_DURATION])
 958                 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
 959         else
 960                 duration = 0;
 961
 962         if (tb[NL80211_ATTR_COOKIE])
 963                 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
 964         else
 965                 cookie = 0;
 966
 967         wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
 968                    "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
 969                    cancel_event, freq, chan_type, duration,
 970                    (long long unsigned int) cookie,
 971                    cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
 972
 973         if (cookie != drv->remain_on_chan_cookie)
 974                 return; /* not for us */
 975
 976         drv->pending_remain_on_chan = !cancel_event;
 977
 978         os_memset(&data, 0, sizeof(data));
 979         data.remain_on_channel.freq = freq;
 980         data.remain_on_channel.duration = duration;
 981         wpa_supplicant_event(drv->ctx, cancel_event ?
 982                              EVENT_CANCEL_REMAIN_ON_CHANNEL :
 983                              EVENT_REMAIN_ON_CHANNEL, &data);
 984 }
 985
 986
 987 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 988                             struct nlattr *tb[])
 989 {
 990         union wpa_event_data event;
 991         struct nlattr *nl;
 992         int rem;
 993         struct scan_info *info;
 994 #define MAX_REPORT_FREQS 50
 995         int freqs[MAX_REPORT_FREQS];
 996         int num_freqs = 0;
 997
 998         os_memset(&event, 0, sizeof(event));
 999         info = &event.scan_info;
1000         info->aborted = aborted;
1001
1002         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
1003                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
1004                         struct wpa_driver_scan_ssid *s =
1005                                 &info->ssids[info->num_ssids];
1006                         s->ssid = nla_data(nl);
1007                         s->ssid_len = nla_len(nl);
1008                         info->num_ssids++;
1009                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
1010                                 break;
1011                 }
1012         }
1013         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
1014                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
1015                 {
1016                         freqs[num_freqs] = nla_get_u32(nl);
1017                         num_freqs++;
1018                         if (num_freqs == MAX_REPORT_FREQS - 1)
1019                                 break;
1020                 }
1021                 info->freqs = freqs;
1022                 info->num_freqs = num_freqs;
1023         }
1024         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
1025 }
1026
1027
1028 static int get_link_signal(struct nl_msg *msg, void *arg)
1029 {
1030         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1031         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1032         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1033         static struct nla_policy policy[NL80211_STA_INFO_MAX + 1] = {
1034                 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1035         };
1036         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1037         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1038                 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1039                 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1040                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1041                 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1042         };
1043         struct signal_change *sig_change = arg;
1044
1045         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1046                   genlmsg_attrlen(gnlh, 0), NULL);
1047         if (!tb[NL80211_ATTR_STA_INFO] ||
1048             nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1049                              tb[NL80211_ATTR_STA_INFO], policy))
1050                 return NL_SKIP;
1051         if (!sinfo[NL80211_STA_INFO_SIGNAL])
1052                 return NL_SKIP;
1053
1054         sig_change->current_signal =
1055                 (s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1056
1057         if (sinfo[NL80211_STA_INFO_TX_BITRATE]) {
1058                 if (nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1059                                      sinfo[NL80211_STA_INFO_TX_BITRATE],
1060                                      rate_policy)) {
1061                         sig_change->current_txrate = 0;
1062                 } else {
1063                         if (rinfo[NL80211_RATE_INFO_BITRATE]) {
1064                                 sig_change->current_txrate =
1065                                         nla_get_u16(rinfo[
1066                                              NL80211_RATE_INFO_BITRATE]) * 100;
1067                         }
1068                 }
1069         }
1070
1071         return NL_SKIP;
1072 }
1073
1074
1075 static int nl80211_get_link_signal(struct wpa_driver_nl80211_data *drv,
1076                                    struct signal_change *sig)
1077 {
1078         struct nl_msg *msg;
1079
1080         sig->current_signal = -9999;
1081         sig->current_txrate = 0;
1082
1083         msg = nlmsg_alloc();
1084         if (!msg)
1085                 return -ENOMEM;
1086
1087         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1088                     0, NL80211_CMD_GET_STATION, 0);
1089
1090         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1091         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
1092
1093         return send_and_recv_msgs(drv, msg, get_link_signal, sig);
1094  nla_put_failure:
1095         return -ENOBUFS;
1096 }
1097
1098
1099 static int get_link_noise(struct nl_msg *msg, void *arg)
1100 {
1101         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1102         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1103         struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
1104         static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
1105                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1106                 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1107         };
1108         struct signal_change *sig_change = arg;
1109
1110         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1111                   genlmsg_attrlen(gnlh, 0), NULL);
1112
1113         if (!tb[NL80211_ATTR_SURVEY_INFO]) {
1114                 wpa_printf(MSG_DEBUG, "nl80211: survey data missing!");
1115                 return NL_SKIP;
1116         }
1117
1118         if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
1119                              tb[NL80211_ATTR_SURVEY_INFO],
1120                              survey_policy)) {
1121                 wpa_printf(MSG_DEBUG, "nl80211: failed to parse nested "
1122                            "attributes!");
1123                 return NL_SKIP;
1124         }
1125
1126         if (!sinfo[NL80211_SURVEY_INFO_FREQUENCY])
1127                 return NL_SKIP;
1128
1129         if (nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]) !=
1130             sig_change->frequency)
1131                 return NL_SKIP;
1132
1133         if (!sinfo[NL80211_SURVEY_INFO_NOISE])
1134                 return NL_SKIP;
1135
1136         sig_change->current_noise =
1137                 (s8) nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
1138
1139         return NL_SKIP;
1140 }
1141
1142
1143 static int nl80211_get_link_noise(struct wpa_driver_nl80211_data *drv,
1144                                   struct signal_change *sig_change)
1145 {
1146         struct nl_msg *msg;
1147
1148         sig_change->current_noise = 9999;
1149         sig_change->frequency = drv->assoc_freq;
1150
1151         msg = nlmsg_alloc();
1152         if (!msg)
1153                 return -ENOMEM;
1154
1155         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1156                     NLM_F_DUMP, NL80211_CMD_GET_SURVEY, 0);
1157
1158         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1159
1160         return send_and_recv_msgs(drv, msg, get_link_noise, sig_change);
1161  nla_put_failure:
1162         return -ENOBUFS;
1163 }
1164
1165
1166 static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
1167                               struct nlattr *tb[])
1168 {
1169         static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
1170                 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
1171                 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
1172                 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
1173         };
1174         struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
1175         enum nl80211_cqm_rssi_threshold_event event;
1176         union wpa_event_data ed;
1177         struct signal_change sig;
1178         int res;
1179
1180         if (tb[NL80211_ATTR_CQM] == NULL ||
1181             nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
1182                              cqm_policy)) {
1183                 wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
1184                 return;
1185         }
1186
1187         if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
1188                 return;
1189         event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
1190
1191         os_memset(&ed, 0, sizeof(ed));
1192
1193         if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
1194                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1195                            "event: RSSI high");
1196                 ed.signal_change.above_threshold = 1;
1197         } else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
1198                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1199                            "event: RSSI low");
1200                 ed.signal_change.above_threshold = 0;
1201         } else
1202                 return;
1203
1204         res = nl80211_get_link_signal(drv, &sig);
1205         if (res == 0) {
1206                 ed.signal_change.current_signal = sig.current_signal;
1207                 ed.signal_change.current_txrate = sig.current_txrate;
1208                 wpa_printf(MSG_DEBUG, "nl80211: Signal: %d dBm  txrate: %d",
1209                            sig.current_signal, sig.current_txrate);
1210         }
1211
1212         res = nl80211_get_link_noise(drv, &sig);
1213         if (res == 0) {
1214                 ed.signal_change.current_noise = sig.current_noise;
1215                 wpa_printf(MSG_DEBUG, "nl80211: Noise: %d dBm",
1216                            sig.current_noise);
1217         }
1218
1219         wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
1220 }
1221
1222
1223 static void nl80211_new_station_event(struct wpa_driver_nl80211_data *drv,
1224                                       struct nlattr **tb)
1225 {
1226         u8 *addr;
1227         union wpa_event_data data;
1228
1229         if (tb[NL80211_ATTR_MAC] == NULL)
1230                 return;
1231         addr = nla_data(tb[NL80211_ATTR_MAC]);
1232         wpa_printf(MSG_DEBUG, "nl80211: New station " MACSTR, MAC2STR(addr));
1233         if (drv->nlmode != NL80211_IFTYPE_ADHOC)
1234                 return;
1235
1236         os_memset(&data, 0, sizeof(data));
1237         os_memcpy(data.ibss_rsn_start.peer, addr, ETH_ALEN);
1238         wpa_supplicant_event(drv->ctx, EVENT_IBSS_RSN_START, &data);
1239 }
1240
1241
1242 static int process_event(struct nl_msg *msg, void *arg)
1243 {
1244         struct wpa_driver_nl80211_data *drv = arg;
1245         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1246         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1247         union wpa_event_data data;
1248
1249         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1250                   genlmsg_attrlen(gnlh, 0), NULL);
1251
1252         if (tb[NL80211_ATTR_IFINDEX]) {
1253                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1254                 if (ifindex != drv->ifindex && !have_ifidx(drv, ifindex)) {
1255                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
1256                                    " for foreign interface (ifindex %d)",
1257                                    gnlh->cmd, ifindex);
1258                         return NL_SKIP;
1259                 }
1260         }
1261
1262         if (drv->ap_scan_as_station &&
1263             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
1264              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
1265                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1266                                             IEEE80211_MODE_AP);
1267                 drv->ap_scan_as_station = 0;
1268         }
1269
1270         switch (gnlh->cmd) {
1271         case NL80211_CMD_TRIGGER_SCAN:
1272                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
1273                 break;
1274         case NL80211_CMD_NEW_SCAN_RESULTS:
1275                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
1276                 drv->scan_complete_events = 1;
1277                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1278                                      drv->ctx);
1279                 send_scan_event(drv, 0, tb);
1280                 break;
1281         case NL80211_CMD_SCAN_ABORTED:
1282                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
1283                 /*
1284                  * Need to indicate that scan results are available in order
1285                  * not to make wpa_supplicant stop its scanning.
1286                  */
1287                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1288                                      drv->ctx);
1289                 send_scan_event(drv, 1, tb);
1290                 break;
1291         case NL80211_CMD_AUTHENTICATE:
1292         case NL80211_CMD_ASSOCIATE:
1293         case NL80211_CMD_DEAUTHENTICATE:
1294         case NL80211_CMD_DISASSOCIATE:
1295         case NL80211_CMD_FRAME:
1296         case NL80211_CMD_FRAME_TX_STATUS:
1297                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
1298                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
1299                            tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
1300                            tb[NL80211_ATTR_COOKIE]);
1301                 break;
1302         case NL80211_CMD_CONNECT:
1303         case NL80211_CMD_ROAM:
1304                 mlme_event_connect(drv, gnlh->cmd,
1305                                    tb[NL80211_ATTR_STATUS_CODE],
1306                                    tb[NL80211_ATTR_MAC],
1307                                    tb[NL80211_ATTR_REQ_IE],
1308                                    tb[NL80211_ATTR_RESP_IE]);
1309                 break;
1310         case NL80211_CMD_DISCONNECT:
1311                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1312                         /*
1313                          * Avoid reporting two disassociation events that could
1314                          * confuse the core code.
1315                          */
1316                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
1317                                    "event when using userspace SME");
1318                         break;
1319                 }
1320                 drv->associated = 0;
1321                 os_memset(&data, 0, sizeof(data));
1322                 if (tb[NL80211_ATTR_REASON_CODE])
1323                         data.disassoc_info.reason_code =
1324                                 nla_get_u16(tb[NL80211_ATTR_REASON_CODE]);
1325                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, &data);
1326                 break;
1327         case NL80211_CMD_MICHAEL_MIC_FAILURE:
1328                 mlme_event_michael_mic_failure(drv, tb);
1329                 break;
1330         case NL80211_CMD_JOIN_IBSS:
1331                 mlme_event_join_ibss(drv, tb);
1332                 break;
1333         case NL80211_CMD_REMAIN_ON_CHANNEL:
1334                 mlme_event_remain_on_channel(drv, 0, tb);
1335                 break;
1336         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
1337                 mlme_event_remain_on_channel(drv, 1, tb);
1338                 break;
1339         case NL80211_CMD_NOTIFY_CQM:
1340                 nl80211_cqm_event(drv, tb);
1341                 break;
1342         case NL80211_CMD_REG_CHANGE:
1343                 wpa_printf(MSG_DEBUG, "nl80211: Regulatory domain change");
1344                 wpa_supplicant_event(drv->ctx, EVENT_CHANNEL_LIST_CHANGED,
1345                                      NULL);
1346                 break;
1347         case NL80211_CMD_REG_BEACON_HINT:
1348                 wpa_printf(MSG_DEBUG, "nl80211: Regulatory beacon hint");
1349                 wpa_supplicant_event(drv->ctx, EVENT_CHANNEL_LIST_CHANGED,
1350                                      NULL);
1351                 break;
1352         case NL80211_CMD_NEW_STATION:
1353                 nl80211_new_station_event(drv, tb);
1354                 break;
1355         default:
1356                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1357                            "(cmd=%d)", gnlh->cmd);
1358                 break;
1359         }
1360
1361         return NL_SKIP;
1362 }
1363
1364
1365 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1366                                              void *handle)
1367 {
1368         struct nl_cb *cb;
1369         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1370
1371         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1372
1373         cb = nl_cb_clone(drv->nl_cb);
1374         if (!cb)
1375                 return;
1376         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1377         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1378         nl_recvmsgs(handle, cb);
1379         nl_cb_put(cb);
1380 }
1381
1382
1383 /**
1384  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1385  * @priv: driver_nl80211 private data
1386  * @alpha2_arg: country to which to switch to
1387  * Returns: 0 on success, -1 on failure
1388  *
1389  * This asks nl80211 to set the regulatory domain for given
1390  * country ISO / IEC alpha2.
1391  */
1392 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1393 {
1394         struct i802_bss *bss = priv;
1395         struct wpa_driver_nl80211_data *drv = bss->drv;
1396         char alpha2[3];
1397         struct nl_msg *msg;
1398
1399         msg = nlmsg_alloc();
1400         if (!msg)
1401                 return -ENOMEM;
1402
1403         alpha2[0] = alpha2_arg[0];
1404         alpha2[1] = alpha2_arg[1];
1405         alpha2[2] = '\0';
1406
1407         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1408                     0, NL80211_CMD_REQ_SET_REG, 0);
1409
1410         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1411         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1412                 return -EINVAL;
1413         return 0;
1414 nla_put_failure:
1415         return -EINVAL;
1416 }
1417
1418
1419 #ifndef HOSTAPD
1420 struct wiphy_info_data {
1421         int max_scan_ssids;
1422         int ap_supported;
1423         int auth_supported;
1424         int connect_supported;
1425 };
1426
1427
1428 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1429 {
1430         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1431         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1432         struct wiphy_info_data *info = arg;
1433
1434         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1435                   genlmsg_attrlen(gnlh, 0), NULL);
1436
1437         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1438                 info->max_scan_ssids =
1439                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1440
1441         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1442                 struct nlattr *nl_mode;
1443                 int i;
1444                 nla_for_each_nested(nl_mode,
1445                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1446                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1447                                 info->ap_supported = 1;
1448                                 break;
1449                         }
1450                 }
1451         }
1452
1453         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1454                 struct nlattr *nl_cmd;
1455                 int i;
1456
1457                 nla_for_each_nested(nl_cmd,
1458                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1459                         u32 cmd = nla_get_u32(nl_cmd);
1460                         if (cmd == NL80211_CMD_AUTHENTICATE)
1461                                 info->auth_supported = 1;
1462                         else if (cmd == NL80211_CMD_CONNECT)
1463                                 info->connect_supported = 1;
1464                 }
1465         }
1466
1467         return NL_SKIP;
1468 }
1469
1470
1471 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1472                                        struct wiphy_info_data *info)
1473 {
1474         struct nl_msg *msg;
1475
1476         os_memset(info, 0, sizeof(*info));
1477         msg = nlmsg_alloc();
1478         if (!msg)
1479                 return -1;
1480
1481         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1482                     0, NL80211_CMD_GET_WIPHY, 0);
1483
1484         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1485
1486         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1487                 return 0;
1488         msg = NULL;
1489 nla_put_failure:
1490         nlmsg_free(msg);
1491         return -1;
1492 }
1493
1494
1495 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1496 {
1497         struct wiphy_info_data info;
1498         if (wpa_driver_nl80211_get_info(drv, &info))
1499                 return -1;
1500         drv->has_capability = 1;
1501         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1502         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1503                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1504                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1505                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1506         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1507                 WPA_DRIVER_CAPA_ENC_WEP104 |
1508                 WPA_DRIVER_CAPA_ENC_TKIP |
1509                 WPA_DRIVER_CAPA_ENC_CCMP;
1510         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1511                 WPA_DRIVER_AUTH_SHARED |
1512                 WPA_DRIVER_AUTH_LEAP;
1513
1514         drv->capa.max_scan_ssids = info.max_scan_ssids;
1515         if (info.ap_supported)
1516                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1517
1518         if (info.auth_supported)
1519                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1520         else if (!info.connect_supported) {
1521                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1522                            "authentication/association or connect commands");
1523                 return -1;
1524         }
1525
1526         drv->capa.flags |= WPA_DRIVER_FLAGS_SANE_ERROR_CODES;
1527         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1528         drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CAPABLE;
1529         drv->capa.max_remain_on_chan = 5000;
1530
1531         return 0;
1532 }
1533 #endif /* HOSTAPD */
1534
1535
1536 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
1537 {
1538         int ret;
1539
1540         /* Initialize generic netlink and nl80211 */
1541
1542         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1543         if (drv->nl_cb == NULL) {
1544                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1545                            "callbacks");
1546                 goto err1;
1547         }
1548
1549         drv->nl_handle = nl80211_handle_alloc(drv->nl_cb);
1550         if (drv->nl_handle == NULL) {
1551                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1552                            "callbacks");
1553                 goto err2;
1554         }
1555
1556         drv->nl_handle_event = nl80211_handle_alloc(drv->nl_cb);
1557         if (drv->nl_handle_event == NULL) {
1558                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1559                            "callbacks (event)");
1560                 goto err2b;
1561         }
1562
1563         if (genl_connect(drv->nl_handle)) {
1564                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1565                            "netlink");
1566                 goto err3;
1567         }
1568
1569         if (genl_connect(drv->nl_handle_event)) {
1570                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1571                            "netlink (event)");
1572                 goto err3;
1573         }
1574
1575 #ifdef CONFIG_LIBNL20
1576         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1577                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1578                            "netlink cache");
1579                 goto err3;
1580         }
1581         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1582             0) {
1583                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1584                            "netlink cache (event)");
1585                 goto err3b;
1586         }
1587 #else /* CONFIG_LIBNL20 */
1588         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1589         if (drv->nl_cache == NULL) {
1590                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1591                            "netlink cache");
1592                 goto err3;
1593         }
1594         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1595         if (drv->nl_cache_event == NULL) {
1596                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1597                            "netlink cache (event)");
1598                 goto err3b;
1599         }
1600 #endif /* CONFIG_LIBNL20 */
1601
1602         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1603         if (drv->nl80211 == NULL) {
1604                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1605                            "found");
1606                 goto err4;
1607         }
1608
1609         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1610         if (ret >= 0)
1611                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1612         if (ret < 0) {
1613                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1614                            "membership for scan events: %d (%s)",
1615                            ret, strerror(-ret));
1616                 goto err4;
1617         }
1618
1619         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1620         if (ret >= 0)
1621                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1622         if (ret < 0) {
1623                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1624                            "membership for mlme events: %d (%s)",
1625                            ret, strerror(-ret));
1626                 goto err4;
1627         }
1628
1629         ret = nl_get_multicast_id(drv, "nl80211", "regulatory");
1630         if (ret >= 0)
1631                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1632         if (ret < 0) {
1633                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
1634                            "membership for regulatory events: %d (%s)",
1635                            ret, strerror(-ret));
1636                 /* Continue without regulatory events */
1637         }
1638
1639         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1640                                  wpa_driver_nl80211_event_receive, drv,
1641                                  drv->nl_handle_event);
1642
1643         return 0;
1644
1645 err4:
1646         nl_cache_free(drv->nl_cache_event);
1647 err3b:
1648         nl_cache_free(drv->nl_cache);
1649 err3:
1650         nl80211_handle_destroy(drv->nl_handle_event);
1651 err2b:
1652         nl80211_handle_destroy(drv->nl_handle);
1653 err2:
1654         nl_cb_put(drv->nl_cb);
1655 err1:
1656         return -1;
1657 }
1658
1659
1660 static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
1661 {
1662         wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");
1663         /*
1664          * This may be for any interface; use ifdown event to disable
1665          * interface.
1666          */
1667 }
1668
1669
1670 static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
1671 {
1672         struct wpa_driver_nl80211_data *drv = ctx;
1673         wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
1674         if (linux_set_iface_flags(drv->ioctl_sock, drv->first_bss.ifname, 1)) {
1675                 wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
1676                            "after rfkill unblock");
1677                 return;
1678         }
1679         /* rtnetlink ifup handler will report interface as enabled */
1680 }
1681
1682
1683 static void nl80211_get_phy_name(struct wpa_driver_nl80211_data *drv)
1684 {
1685         /* Find phy (radio) to which this interface belongs */
1686         char buf[90], *pos;
1687         int f, rv;
1688
1689         drv->phyname[0] = '\0';
1690         snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
1691                  drv->first_bss.ifname);
1692         f = open(buf, O_RDONLY);
1693         if (f < 0) {
1694                 wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
1695                            buf, strerror(errno));
1696                 return;
1697         }
1698
1699         rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
1700         close(f);
1701         if (rv < 0) {
1702                 wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
1703                            buf, strerror(errno));
1704                 return;
1705         }
1706
1707         drv->phyname[rv] = '\0';
1708         pos = os_strchr(drv->phyname, '\n');
1709         if (pos)
1710                 *pos = '\0';
1711         wpa_printf(MSG_DEBUG, "nl80211: interface %s in phy %s",
1712                    drv->first_bss.ifname, drv->phyname);
1713 }
1714
1715
1716 /**
1717  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1718  * @ctx: context to be used when calling wpa_supplicant functions,
1719  * e.g., wpa_supplicant_event()
1720  * @ifname: interface name, e.g., wlan0
1721  * @global_priv: private driver global data from global_init()
1722  * Returns: Pointer to private data, %NULL on failure
1723  */
1724 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname,
1725                                       void *global_priv)
1726 {
1727         struct wpa_driver_nl80211_data *drv;
1728         struct netlink_config *cfg;
1729         struct rfkill_config *rcfg;
1730         struct i802_bss *bss;
1731
1732         drv = os_zalloc(sizeof(*drv));
1733         if (drv == NULL)
1734                 return NULL;
1735         drv->global = global_priv;
1736         if (drv->global)
1737                 dl_list_add(&drv->global->interfaces, &drv->list);
1738         drv->ctx = ctx;
1739         bss = &drv->first_bss;
1740         bss->drv = drv;
1741         os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
1742         drv->monitor_ifidx = -1;
1743         drv->monitor_sock = -1;
1744         drv->ioctl_sock = -1;
1745
1746         if (wpa_driver_nl80211_init_nl(drv)) {
1747                 os_free(drv);
1748                 return NULL;
1749         }
1750
1751         nl80211_get_phy_name(drv);
1752
1753         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1754         if (drv->ioctl_sock < 0) {
1755                 perror("socket(PF_INET,SOCK_DGRAM)");
1756                 goto failed;
1757         }
1758
1759         cfg = os_zalloc(sizeof(*cfg));
1760         if (cfg == NULL)
1761                 goto failed;
1762         cfg->ctx = drv;
1763         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1764         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1765         drv->netlink = netlink_init(cfg);
1766         if (drv->netlink == NULL) {
1767                 os_free(cfg);
1768                 goto failed;
1769         }
1770
1771         rcfg = os_zalloc(sizeof(*rcfg));
1772         if (rcfg == NULL)
1773                 goto failed;
1774         rcfg->ctx = drv;
1775         os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
1776         rcfg->blocked_cb = wpa_driver_nl80211_rfkill_blocked;
1777         rcfg->unblocked_cb = wpa_driver_nl80211_rfkill_unblocked;
1778         drv->rfkill = rfkill_init(rcfg);
1779         if (drv->rfkill == NULL) {
1780                 wpa_printf(MSG_DEBUG, "nl80211: RFKILL status not available");
1781                 os_free(rcfg);
1782         }
1783
1784         if (wpa_driver_nl80211_finish_drv_init(drv))
1785                 goto failed;
1786
1787         return bss;
1788
1789 failed:
1790         rfkill_deinit(drv->rfkill);
1791         netlink_deinit(drv->netlink);
1792         if (drv->ioctl_sock >= 0)
1793                 close(drv->ioctl_sock);
1794
1795         genl_family_put(drv->nl80211);
1796         nl_cache_free(drv->nl_cache);
1797         nl80211_handle_destroy(drv->nl_handle);
1798         nl_cb_put(drv->nl_cb);
1799         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1800
1801         os_free(drv);
1802         return NULL;
1803 }
1804
1805
1806 static int nl80211_register_frame(struct wpa_driver_nl80211_data *drv,
1807                                   struct nl_handle *nl_handle,
1808                                   u16 type, const u8 *match, size_t match_len)
1809 {
1810         struct nl_msg *msg;
1811         int ret = -1;
1812
1813         msg = nlmsg_alloc();
1814         if (!msg)
1815                 return -1;
1816
1817         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1818                     NL80211_CMD_REGISTER_ACTION, 0);
1819
1820         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1821         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE, type);
1822         NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1823
1824         ret = send_and_recv(drv, nl_handle, msg, NULL, NULL);
1825         msg = NULL;
1826         if (ret) {
1827                 wpa_printf(MSG_DEBUG, "nl80211: Register frame command "
1828                            "failed (type=%u): ret=%d (%s)",
1829                            type, ret, strerror(-ret));
1830                 wpa_hexdump(MSG_DEBUG, "nl80211: Register frame match",
1831                             match, match_len);
1832                 goto nla_put_failure;
1833         }
1834         ret = 0;
1835 nla_put_failure:
1836         nlmsg_free(msg);
1837         return ret;
1838 }
1839
1840
1841 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1842                                          const u8 *match, size_t match_len)
1843 {
1844         u16 type = (WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_ACTION << 4);
1845         return nl80211_register_frame(drv, drv->nl_handle_event,
1846                                       type, match, match_len);
1847 }
1848
1849
1850 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1851 {
1852 #ifdef CONFIG_P2P
1853         /* GAS Initial Request */
1854         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0a", 2) < 0)
1855                 return -1;
1856         /* GAS Initial Response */
1857         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0b", 2) < 0)
1858                 return -1;
1859         /* GAS Comeback Request */
1860         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0c", 2) < 0)
1861                 return -1;
1862         /* GAS Comeback Response */
1863         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0d", 2) < 0)
1864                 return -1;
1865         /* P2P Public Action */
1866         if (nl80211_register_action_frame(drv,
1867                                           (u8 *) "\x04\x09\x50\x6f\x9a\x09",
1868                                           6) < 0)
1869                 return -1;
1870         /* P2P Action */
1871         if (nl80211_register_action_frame(drv,
1872                                           (u8 *) "\x7f\x50\x6f\x9a\x09",
1873                                           5) < 0)
1874                 return -1;
1875 #endif /* CONFIG_P2P */
1876
1877         /* FT Action frames */
1878         if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
1879                 return -1;
1880         else
1881                 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
1882                         WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
1883
1884         return 0;
1885 }
1886
1887
1888 static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
1889 {
1890         wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
1891 }
1892
1893
1894 static int
1895 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1896 {
1897         struct i802_bss *bss = &drv->first_bss;
1898         int send_rfkill_event = 0;
1899
1900         drv->ifindex = if_nametoindex(bss->ifname);
1901         drv->first_bss.ifindex = drv->ifindex;
1902
1903 #ifndef HOSTAPD
1904         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
1905                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1906                            "use managed mode");
1907         }
1908
1909         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
1910                 if (rfkill_is_blocked(drv->rfkill)) {
1911                         wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
1912                                    "interface '%s' due to rfkill",
1913                                    bss->ifname);
1914                         drv->if_disabled = 1;
1915                         send_rfkill_event = 1;
1916                 } else {
1917                         wpa_printf(MSG_ERROR, "nl80211: Could not set "
1918                                    "interface '%s' UP", bss->ifname);
1919                         return -1;
1920                 }
1921         }
1922
1923         if (wpa_driver_nl80211_capa(drv))
1924                 return -1;
1925
1926         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1927                                1, IF_OPER_DORMANT);
1928 #endif /* HOSTAPD */
1929
1930         linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, drv->addr);
1931
1932         if (nl80211_register_action_frames(drv) < 0) {
1933                 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
1934                            "frame processing - ignore for now");
1935                 /*
1936                  * Older kernel versions did not support this, so ignore the
1937                  * error for now. Some functionality may not be available
1938                  * because of this.
1939                  */
1940         }
1941
1942         if (send_rfkill_event) {
1943                 eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
1944                                        drv, drv->ctx);
1945         }
1946
1947         return 0;
1948 }
1949
1950
1951 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1952 {
1953         struct nl_msg *msg;
1954
1955         msg = nlmsg_alloc();
1956         if (!msg)
1957                 return -ENOMEM;
1958
1959         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1960                     0, NL80211_CMD_DEL_BEACON, 0);
1961         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1962
1963         return send_and_recv_msgs(drv, msg, NULL, NULL);
1964  nla_put_failure:
1965         return -ENOBUFS;
1966 }
1967
1968
1969 /**
1970  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1971  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1972  *
1973  * Shut down driver interface and processing of driver events. Free
1974  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1975  */
1976 static void wpa_driver_nl80211_deinit(void *priv)
1977 {
1978         struct i802_bss *bss = priv;
1979         struct wpa_driver_nl80211_data *drv = bss->drv;
1980
1981         if (drv->nl_handle_preq)
1982                 wpa_driver_nl80211_probe_req_report(bss, 0);
1983         if (drv->added_if_into_bridge) {
1984                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
1985                     < 0)
1986                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1987                                    "interface %s from bridge %s: %s",
1988                                    bss->ifname, drv->brname, strerror(errno));
1989         }
1990         if (drv->added_bridge) {
1991                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1992                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1993                                    "bridge %s: %s",
1994                                    drv->brname, strerror(errno));
1995         }
1996
1997         nl80211_remove_monitor_interface(drv);
1998
1999         if (drv->nlmode == NL80211_IFTYPE_AP)
2000                 wpa_driver_nl80211_del_beacon(drv);
2001
2002 #ifdef HOSTAPD
2003         if (drv->last_freq_ht) {
2004                 /* Clear HT flags from the driver */
2005                 struct hostapd_freq_params freq;
2006                 os_memset(&freq, 0, sizeof(freq));
2007                 freq.freq = drv->last_freq;
2008                 i802_set_freq(priv, &freq);
2009         }
2010
2011         if (drv->eapol_sock >= 0) {
2012                 eloop_unregister_read_sock(drv->eapol_sock);
2013                 close(drv->eapol_sock);
2014         }
2015
2016         if (drv->if_indices != drv->default_if_indices)
2017                 os_free(drv->if_indices);
2018 #endif /* HOSTAPD */
2019
2020         if (drv->disable_11b_rates)
2021                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
2022
2023         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
2024         netlink_deinit(drv->netlink);
2025         rfkill_deinit(drv->rfkill);
2026
2027         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
2028
2029         (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
2030         wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
2031
2032         if (drv->ioctl_sock >= 0)
2033                 close(drv->ioctl_sock);
2034
2035         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
2036         genl_family_put(drv->nl80211);
2037         nl_cache_free(drv->nl_cache);
2038         nl_cache_free(drv->nl_cache_event);
2039         nl80211_handle_destroy(drv->nl_handle);
2040         nl80211_handle_destroy(drv->nl_handle_event);
2041         nl_cb_put(drv->nl_cb);
2042
2043         os_free(drv->filter_ssids);
2044
2045         if (drv->global)
2046                 dl_list_del(&drv->list);
2047
2048         os_free(drv);
2049 }
2050
2051
2052 /**
2053  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
2054  * @eloop_ctx: Driver private data
2055  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
2056  *
2057  * This function can be used as registered timeout when starting a scan to
2058  * generate a scan completed event if the driver does not report this.
2059  */
2060 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
2061 {
2062         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2063         if (drv->ap_scan_as_station) {
2064                 wpa_driver_nl80211_set_mode(&drv->first_bss,
2065                                             IEEE80211_MODE_AP);
2066                 drv->ap_scan_as_station = 0;
2067         }
2068         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
2069         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
2070 }
2071
2072
2073 /**
2074  * wpa_driver_nl80211_scan - Request the driver to initiate scan
2075  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
2076  * @params: Scan parameters
2077  * Returns: 0 on success, -1 on failure
2078  */
2079 static int wpa_driver_nl80211_scan(void *priv,
2080                                    struct wpa_driver_scan_params *params)
2081 {
2082         struct i802_bss *bss = priv;
2083         struct wpa_driver_nl80211_data *drv = bss->drv;
2084         int ret = 0, timeout;
2085         struct nl_msg *msg, *ssids, *freqs;
2086         size_t i;
2087
2088         msg = nlmsg_alloc();
2089         ssids = nlmsg_alloc();
2090         freqs = nlmsg_alloc();
2091         if (!msg || !ssids || !freqs) {
2092                 nlmsg_free(msg);
2093                 nlmsg_free(ssids);
2094                 nlmsg_free(freqs);
2095                 return -1;
2096         }
2097
2098         os_free(drv->filter_ssids);
2099         drv->filter_ssids = params->filter_ssids;
2100         params->filter_ssids = NULL;
2101         drv->num_filter_ssids = params->num_filter_ssids;
2102
2103         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2104                     NL80211_CMD_TRIGGER_SCAN, 0);
2105
2106         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2107
2108         for (i = 0; i < params->num_ssids; i++) {
2109                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
2110                                   params->ssids[i].ssid,
2111                                   params->ssids[i].ssid_len);
2112                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
2113                         params->ssids[i].ssid);
2114         }
2115         if (params->num_ssids)
2116                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
2117
2118         if (params->extra_ies) {
2119                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
2120                                   params->extra_ies, params->extra_ies_len);
2121                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
2122                         params->extra_ies);
2123         }
2124
2125         if (params->freqs) {
2126                 for (i = 0; params->freqs[i]; i++) {
2127                         wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
2128                                    "MHz", params->freqs[i]);
2129                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
2130                 }
2131                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
2132         }
2133
2134         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2135         msg = NULL;
2136         if (ret) {
2137                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
2138                            "(%s)", ret, strerror(-ret));
2139 #ifdef HOSTAPD
2140                 if (drv->nlmode == NL80211_IFTYPE_AP) {
2141                         /*
2142                          * mac80211 does not allow scan requests in AP mode, so
2143                          * try to do this in station mode.
2144                          */
2145                         if (wpa_driver_nl80211_set_mode(bss,
2146                                                         IEEE80211_MODE_INFRA))
2147                                 goto nla_put_failure;
2148
2149                         if (wpa_driver_nl80211_scan(drv, params)) {
2150                                 wpa_driver_nl80211_set_mode(bss,
2151                                                             IEEE80211_MODE_AP);
2152                                 goto nla_put_failure;
2153                         }
2154
2155                         /* Restore AP mode when processing scan results */
2156                         drv->ap_scan_as_station = 1;
2157                         ret = 0;
2158                 } else
2159                         goto nla_put_failure;
2160 #else /* HOSTAPD */
2161                 goto nla_put_failure;
2162 #endif /* HOSTAPD */
2163         }
2164
2165         /* Not all drivers generate "scan completed" wireless event, so try to
2166          * read results after a timeout. */
2167         timeout = 10;
2168         if (drv->scan_complete_events) {
2169                 /*
2170                  * The driver seems to deliver events to notify when scan is
2171                  * complete, so use longer timeout to avoid race conditions
2172                  * with scanning and following association request.
2173                  */
2174                 timeout = 30;
2175         }
2176         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
2177                    "seconds", ret, timeout);
2178         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
2179         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
2180                                drv, drv->ctx);
2181
2182 nla_put_failure:
2183         nlmsg_free(ssids);
2184         nlmsg_free(msg);
2185         nlmsg_free(freqs);
2186         return ret;
2187 }
2188
2189
2190 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
2191 {
2192         const u8 *end, *pos;
2193
2194         if (ies == NULL)
2195                 return NULL;
2196
2197         pos = ies;
2198         end = ies + ies_len;
2199
2200         while (pos + 1 < end) {
2201                 if (pos + 2 + pos[1] > end)
2202                         break;
2203                 if (pos[0] == ie)
2204                         return pos;
2205                 pos += 2 + pos[1];
2206         }
2207
2208         return NULL;
2209 }
2210
2211
2212 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
2213                                  const u8 *ie, size_t ie_len)
2214 {
2215         const u8 *ssid;
2216         size_t i;
2217
2218         if (drv->filter_ssids == NULL)
2219                 return 0;
2220
2221         ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
2222         if (ssid == NULL)
2223                 return 1;
2224
2225         for (i = 0; i < drv->num_filter_ssids; i++) {
2226                 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
2227                     os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
2228                     0)
2229                         return 0;
2230         }
2231
2232         return 1;
2233 }
2234
2235
2236 struct nl80211_bss_info_arg {
2237         struct wpa_driver_nl80211_data *drv;
2238         struct wpa_scan_results *res;
2239 };
2240
2241 static int bss_info_handler(struct nl_msg *msg, void *arg)
2242 {
2243         struct nlattr *tb[NL80211_ATTR_MAX + 1];
2244         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2245         struct nlattr *bss[NL80211_BSS_MAX + 1];
2246         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2247                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
2248                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2249                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2250                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2251                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2252                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
2253                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2254                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2255                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2256                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2257                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
2258         };
2259         struct nl80211_bss_info_arg *_arg = arg;
2260         struct wpa_scan_results *res = _arg->res;
2261         struct wpa_scan_res **tmp;
2262         struct wpa_scan_res *r;
2263         const u8 *ie, *beacon_ie;
2264         size_t ie_len, beacon_ie_len;
2265         u8 *pos;
2266
2267         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2268                   genlmsg_attrlen(gnlh, 0), NULL);
2269         if (!tb[NL80211_ATTR_BSS])
2270                 return NL_SKIP;
2271         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2272                              bss_policy))
2273                 return NL_SKIP;
2274         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
2275                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2276                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2277         } else {
2278                 ie = NULL;
2279                 ie_len = 0;
2280         }
2281         if (bss[NL80211_BSS_BEACON_IES]) {
2282                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
2283                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
2284         } else {
2285                 beacon_ie = NULL;
2286                 beacon_ie_len = 0;
2287         }
2288
2289         if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
2290                                   ie ? ie_len : beacon_ie_len))
2291                 return NL_SKIP;
2292
2293         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
2294         if (r == NULL)
2295                 return NL_SKIP;
2296         if (bss[NL80211_BSS_BSSID])
2297                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
2298                           ETH_ALEN);
2299         if (bss[NL80211_BSS_FREQUENCY])
2300                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2301         if (bss[NL80211_BSS_BEACON_INTERVAL])
2302                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
2303         if (bss[NL80211_BSS_CAPABILITY])
2304                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2305         r->flags |= WPA_SCAN_NOISE_INVALID;
2306         if (bss[NL80211_BSS_SIGNAL_MBM]) {
2307                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
2308                 r->level /= 100; /* mBm to dBm */
2309                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
2310         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
2311                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
2312                 r->flags |= WPA_SCAN_LEVEL_INVALID;
2313         } else
2314                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
2315         if (bss[NL80211_BSS_TSF])
2316                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
2317         if (bss[NL80211_BSS_SEEN_MS_AGO])
2318                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
2319         r->ie_len = ie_len;
2320         pos = (u8 *) (r + 1);
2321         if (ie) {
2322                 os_memcpy(pos, ie, ie_len);
2323                 pos += ie_len;
2324         }
2325         r->beacon_ie_len = beacon_ie_len;
2326         if (beacon_ie)
2327                 os_memcpy(pos, beacon_ie, beacon_ie_len);
2328
2329         if (bss[NL80211_BSS_STATUS]) {
2330                 enum nl80211_bss_status status;
2331                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
2332                 switch (status) {
2333                 case NL80211_BSS_STATUS_AUTHENTICATED:
2334                         r->flags |= WPA_SCAN_AUTHENTICATED;
2335                         break;
2336                 case NL80211_BSS_STATUS_ASSOCIATED:
2337                         r->flags |= WPA_SCAN_ASSOCIATED;
2338                         break;
2339                 default:
2340                         break;
2341                 }
2342         }
2343
2344         tmp = os_realloc(res->res,
2345                          (res->num + 1) * sizeof(struct wpa_scan_res *));
2346         if (tmp == NULL) {
2347                 os_free(r);
2348                 return NL_SKIP;
2349         }
2350         tmp[res->num++] = r;
2351         res->res = tmp;
2352
2353         return NL_SKIP;
2354 }
2355
2356
2357 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
2358                                  const u8 *addr)
2359 {
2360         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
2361                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
2362                            "mismatch (" MACSTR ")", MAC2STR(addr));
2363                 wpa_driver_nl80211_mlme(drv, addr,
2364                                         NL80211_CMD_DEAUTHENTICATE,
2365                                         WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
2366         }
2367 }
2368
2369
2370 static void wpa_driver_nl80211_check_bss_status(
2371         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
2372 {
2373         size_t i;
2374
2375         for (i = 0; i < res->num; i++) {
2376                 struct wpa_scan_res *r = res->res[i];
2377                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
2378                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2379                                    "indicates BSS status with " MACSTR
2380                                    " as authenticated",
2381                                    MAC2STR(r->bssid));
2382                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2383                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
2384                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
2385                             0) {
2386                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
2387                                            " in local state (auth=" MACSTR
2388                                            " assoc=" MACSTR ")",
2389                                            MAC2STR(drv->auth_bssid),
2390                                            MAC2STR(drv->bssid));
2391                                 clear_state_mismatch(drv, r->bssid);
2392                         }
2393                 }
2394
2395                 if (r->flags & WPA_SCAN_ASSOCIATED) {
2396                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2397                                    "indicate BSS status with " MACSTR
2398                                    " as associated",
2399                                    MAC2STR(r->bssid));
2400                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2401                             !drv->associated) {
2402                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2403                                            "(not associated) does not match "
2404                                            "with BSS state");
2405                                 clear_state_mismatch(drv, r->bssid);
2406                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
2407                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
2408                                    0) {
2409                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2410                                            "(associated with " MACSTR ") does "
2411                                            "not match with BSS state",
2412                                            MAC2STR(drv->bssid));
2413                                 clear_state_mismatch(drv, r->bssid);
2414                                 clear_state_mismatch(drv, drv->bssid);
2415                         }
2416                 }
2417         }
2418 }
2419
2420
2421 static void wpa_scan_results_free(struct wpa_scan_results *res)
2422 {
2423         size_t i;
2424
2425         if (res == NULL)
2426                 return;
2427
2428         for (i = 0; i < res->num; i++)
2429                 os_free(res->res[i]);
2430         os_free(res->res);
2431         os_free(res);
2432 }
2433
2434
2435 static struct wpa_scan_results *
2436 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
2437 {
2438         struct nl_msg *msg;
2439         struct wpa_scan_results *res;
2440         int ret;
2441         struct nl80211_bss_info_arg arg;
2442
2443         res = os_zalloc(sizeof(*res));
2444         if (res == NULL)
2445                 return NULL;
2446         msg = nlmsg_alloc();
2447         if (!msg)
2448                 goto nla_put_failure;
2449
2450         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
2451                     NL80211_CMD_GET_SCAN, 0);
2452         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2453
2454         arg.drv = drv;
2455         arg.res = res;
2456         ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
2457         msg = NULL;
2458         if (ret == 0) {
2459                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
2460                            (unsigned long) res->num);
2461                 return res;
2462         }
2463         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
2464                    "(%s)", ret, strerror(-ret));
2465 nla_put_failure:
2466         nlmsg_free(msg);
2467         wpa_scan_results_free(res);
2468         return NULL;
2469 }
2470
2471
2472 /**
2473  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
2474  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2475  * Returns: Scan results on success, -1 on failure
2476  */
2477 static struct wpa_scan_results *
2478 wpa_driver_nl80211_get_scan_results(void *priv)
2479 {
2480         struct i802_bss *bss = priv;
2481         struct wpa_driver_nl80211_data *drv = bss->drv;
2482         struct wpa_scan_results *res;
2483
2484         res = nl80211_get_scan_results(drv);
2485         if (res)
2486                 wpa_driver_nl80211_check_bss_status(drv, res);
2487         return res;
2488 }
2489
2490
2491 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
2492 {
2493         struct wpa_scan_results *res;
2494         size_t i;
2495
2496         res = nl80211_get_scan_results(drv);
2497         if (res == NULL) {
2498                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
2499                 return;
2500         }
2501
2502         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
2503         for (i = 0; i < res->num; i++) {
2504                 struct wpa_scan_res *r = res->res[i];
2505                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
2506                            (int) i, (int) res->num, MAC2STR(r->bssid),
2507                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
2508                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
2509         }
2510
2511         wpa_scan_results_free(res);
2512 }
2513
2514
2515 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
2516                                       enum wpa_alg alg, const u8 *addr,
2517                                       int key_idx, int set_tx,
2518                                       const u8 *seq, size_t seq_len,
2519                                       const u8 *key, size_t key_len)
2520 {
2521         struct i802_bss *bss = priv;
2522         struct wpa_driver_nl80211_data *drv = bss->drv;
2523         int ifindex = if_nametoindex(ifname);
2524         struct nl_msg *msg;
2525         int ret;
2526
2527         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
2528                    "set_tx=%d seq_len=%lu key_len=%lu",
2529                    __func__, ifindex, alg, addr, key_idx, set_tx,
2530                    (unsigned long) seq_len, (unsigned long) key_len);
2531
2532         msg = nlmsg_alloc();
2533         if (!msg)
2534                 return -ENOMEM;
2535
2536         if (alg == WPA_ALG_NONE) {
2537                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2538                             0, NL80211_CMD_DEL_KEY, 0);
2539         } else {
2540                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2541                             0, NL80211_CMD_NEW_KEY, 0);
2542                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2543                 switch (alg) {
2544                 case WPA_ALG_WEP:
2545                         if (key_len == 5)
2546                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2547                                             WLAN_CIPHER_SUITE_WEP40);
2548                         else
2549                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2550                                             WLAN_CIPHER_SUITE_WEP104);
2551                         break;
2552                 case WPA_ALG_TKIP:
2553                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2554                                     WLAN_CIPHER_SUITE_TKIP);
2555                         break;
2556                 case WPA_ALG_CCMP:
2557                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2558                                     WLAN_CIPHER_SUITE_CCMP);
2559                         break;
2560                 case WPA_ALG_IGTK:
2561                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2562                                     WLAN_CIPHER_SUITE_AES_CMAC);
2563                         break;
2564                 default:
2565                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2566                                    "algorithm %d", __func__, alg);
2567                         nlmsg_free(msg);
2568                         return -1;
2569                 }
2570         }
2571
2572         if (seq && seq_len)
2573                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
2574
2575         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2576         {
2577                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
2578                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2579
2580                 if (alg != WPA_ALG_WEP && key_idx && !set_tx) {
2581                         wpa_printf(MSG_DEBUG, "   RSN IBSS RX GTK");
2582                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE,
2583                                     NL80211_KEYTYPE_GROUP);
2584                 }
2585         }
2586         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2587         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2588
2589         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2590         if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
2591                 ret = 0;
2592         if (ret)
2593                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2594                            ret, strerror(-ret));
2595
2596         /*
2597          * If we failed or don't need to set the default TX key (below),
2598          * we're done here.
2599          */
2600         if (ret || !set_tx || alg == WPA_ALG_NONE)
2601                 return ret;
2602 #ifdef HOSTAPD
2603         if (addr)
2604                 return ret;
2605 #else /* HOSTAPD */
2606         if (drv->nlmode == NL80211_IFTYPE_AP && addr)
2607                 return ret;
2608 #endif /* HOSTAPD */
2609
2610         msg = nlmsg_alloc();
2611         if (!msg)
2612                 return -ENOMEM;
2613
2614         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2615                     0, NL80211_CMD_SET_KEY, 0);
2616         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2617         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2618         if (alg == WPA_ALG_IGTK)
2619                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2620         else
2621                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2622
2623         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2624         if (ret == -ENOENT)
2625                 ret = 0;
2626         if (ret)
2627                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2628                            "err=%d %s)", ret, strerror(-ret));
2629         return ret;
2630
2631 nla_put_failure:
2632         return -ENOBUFS;
2633 }
2634
2635
2636 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2637                       int key_idx, int defkey,
2638                       const u8 *seq, size_t seq_len,
2639                       const u8 *key, size_t key_len)
2640 {
2641         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2642         if (!key_attr)
2643                 return -1;
2644
2645         if (defkey && alg == WPA_ALG_IGTK)
2646                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2647         else if (defkey)
2648                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2649
2650         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2651
2652         switch (alg) {
2653         case WPA_ALG_WEP:
2654                 if (key_len == 5)
2655                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2656                                     WLAN_CIPHER_SUITE_WEP40);
2657                 else
2658                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2659                                     WLAN_CIPHER_SUITE_WEP104);
2660                 break;
2661         case WPA_ALG_TKIP:
2662                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2663                 break;
2664         case WPA_ALG_CCMP:
2665                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2666                 break;
2667         case WPA_ALG_IGTK:
2668                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2669                             WLAN_CIPHER_SUITE_AES_CMAC);
2670                 break;
2671         default:
2672                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2673                            "algorithm %d", __func__, alg);
2674                 return -1;
2675         }
2676
2677         if (seq && seq_len)
2678                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2679
2680         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2681
2682         nla_nest_end(msg, key_attr);
2683
2684         return 0;
2685  nla_put_failure:
2686         return -1;
2687 }
2688
2689
2690 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2691                                  struct nl_msg *msg)
2692 {
2693         int i, privacy = 0;
2694         struct nlattr *nl_keys, *nl_key;
2695
2696         for (i = 0; i < 4; i++) {
2697                 if (!params->wep_key[i])
2698                         continue;
2699                 privacy = 1;
2700                 break;
2701         }
2702         if (params->wps == WPS_MODE_PRIVACY)
2703                 privacy = 1;
2704         if (params->pairwise_suite &&
2705             params->pairwise_suite != WPA_CIPHER_NONE)
2706                 privacy = 1;
2707
2708         if (!privacy)
2709                 return 0;
2710
2711         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2712
2713         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2714         if (!nl_keys)
2715                 goto nla_put_failure;
2716
2717         for (i = 0; i < 4; i++) {
2718                 if (!params->wep_key[i])
2719                         continue;
2720
2721                 nl_key = nla_nest_start(msg, i);
2722                 if (!nl_key)
2723                         goto nla_put_failure;
2724
2725                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2726                         params->wep_key[i]);
2727                 if (params->wep_key_len[i] == 5)
2728                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2729                                     WLAN_CIPHER_SUITE_WEP40);
2730                 else
2731                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2732                                     WLAN_CIPHER_SUITE_WEP104);
2733
2734                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2735
2736                 if (i == params->wep_tx_keyidx)
2737                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2738
2739                 nla_nest_end(msg, nl_key);
2740         }
2741         nla_nest_end(msg, nl_keys);
2742
2743         return 0;
2744
2745 nla_put_failure:
2746         return -ENOBUFS;
2747 }
2748
2749
2750 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2751                                    const u8 *addr, int cmd, u16 reason_code,
2752                                    int local_state_change)
2753 {
2754         int ret = -1;
2755         struct nl_msg *msg;
2756
2757         msg = nlmsg_alloc();
2758         if (!msg)
2759                 return -1;
2760
2761         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2762
2763         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2764         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2765         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2766         if (local_state_change)
2767                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2768
2769         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2770         msg = NULL;
2771         if (ret) {
2772                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2773                            "(%s)", ret, strerror(-ret));
2774                 goto nla_put_failure;
2775         }
2776         ret = 0;
2777
2778 nla_put_failure:
2779         nlmsg_free(msg);
2780         return ret;
2781 }
2782
2783
2784 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2785                                          const u8 *addr, int reason_code)
2786 {
2787         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2788                    __func__, MAC2STR(addr), reason_code);
2789         drv->associated = 0;
2790         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2791                                        reason_code, 0);
2792 }
2793
2794
2795 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2796                                              int reason_code)
2797 {
2798         struct i802_bss *bss = priv;
2799         struct wpa_driver_nl80211_data *drv = bss->drv;
2800         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2801                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2802         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2803                    __func__, MAC2STR(addr), reason_code);
2804         drv->associated = 0;
2805         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2806                                        reason_code, 0);
2807 }
2808
2809
2810 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2811                                            int reason_code)
2812 {
2813         struct i802_bss *bss = priv;
2814         struct wpa_driver_nl80211_data *drv = bss->drv;
2815         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2816                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2817         wpa_printf(MSG_DEBUG, "%s", __func__);
2818         drv->associated = 0;
2819         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2820                                        reason_code, 0);
2821 }
2822
2823
2824 static int wpa_driver_nl80211_authenticate(
2825         void *priv, struct wpa_driver_auth_params *params)
2826 {
2827         struct i802_bss *bss = priv;
2828         struct wpa_driver_nl80211_data *drv = bss->drv;
2829         int ret = -1, i;
2830         struct nl_msg *msg;
2831         enum nl80211_auth_type type;
2832         int count = 0;
2833
2834         drv->associated = 0;
2835         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2836         /* FIX: IBSS mode */
2837         if (drv->nlmode != NL80211_IFTYPE_STATION)
2838                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2839
2840         if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2841                 return -1;
2842
2843 retry:
2844         msg = nlmsg_alloc();
2845         if (!msg)
2846                 return -1;
2847
2848         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2849                    drv->ifindex);
2850
2851         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2852                     NL80211_CMD_AUTHENTICATE, 0);
2853
2854         for (i = 0; i < 4; i++) {
2855                 if (!params->wep_key[i])
2856                         continue;
2857                 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
2858                                            NULL, i,
2859                                            i == params->wep_tx_keyidx, NULL, 0,
2860                                            params->wep_key[i],
2861                                            params->wep_key_len[i]);
2862                 if (params->wep_tx_keyidx != i)
2863                         continue;
2864                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2865                                params->wep_key[i], params->wep_key_len[i])) {
2866                         nlmsg_free(msg);
2867                         return -1;
2868                 }
2869         }
2870
2871         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2872         if (params->bssid) {
2873                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2874                            MAC2STR(params->bssid));
2875                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2876         }
2877         if (params->freq) {
2878                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2879                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2880         }
2881         if (params->ssid) {
2882                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2883                                   params->ssid, params->ssid_len);
2884                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2885                         params->ssid);
2886         }
2887         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2888         if (params->ie)
2889                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2890         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2891                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2892         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2893                 type = NL80211_AUTHTYPE_SHARED_KEY;
2894         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2895                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2896         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2897                 type = NL80211_AUTHTYPE_FT;
2898         else
2899                 goto nla_put_failure;
2900         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2901         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2902         if (params->local_state_change) {
2903                 wpa_printf(MSG_DEBUG, "  * Local state change only");
2904                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2905         }
2906
2907         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2908         msg = NULL;
2909         if (ret) {
2910                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2911                            "(%s)", ret, strerror(-ret));
2912                 count++;
2913                 if (ret == -EALREADY && count == 1 && params->bssid &&
2914                     !params->local_state_change) {
2915                         /*
2916                          * mac80211 does not currently accept new
2917                          * authentication if we are already authenticated. As a
2918                          * workaround, force deauthentication and try again.
2919                          */
2920                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2921                                    "after forced deauthentication");
2922                         wpa_driver_nl80211_deauthenticate(
2923                                 bss, params->bssid,
2924                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2925                         nlmsg_free(msg);
2926                         goto retry;
2927                 }
2928                 goto nla_put_failure;
2929         }
2930         ret = 0;
2931         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2932                    "successfully");
2933
2934 nla_put_failure:
2935         nlmsg_free(msg);
2936         return ret;
2937 }
2938
2939
2940 struct phy_info_arg {
2941         u16 *num_modes;
2942         struct hostapd_hw_modes *modes;
2943 };
2944
2945 static int phy_info_handler(struct nl_msg *msg, void *arg)
2946 {
2947         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2948         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2949         struct phy_info_arg *phy_info = arg;
2950
2951         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2952
2953         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2954         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2955                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2956                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2957                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2958                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2959                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2960                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2961         };
2962
2963         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2964         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2965                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2966                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2967         };
2968
2969         struct nlattr *nl_band;
2970         struct nlattr *nl_freq;
2971         struct nlattr *nl_rate;
2972         int rem_band, rem_freq, rem_rate;
2973         struct hostapd_hw_modes *mode;
2974         int idx, mode_is_set;
2975
2976         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2977                   genlmsg_attrlen(gnlh, 0), NULL);
2978
2979         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2980                 return NL_SKIP;
2981
2982         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2983                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2984                 if (!mode)
2985                         return NL_SKIP;
2986                 phy_info->modes = mode;
2987
2988                 mode_is_set = 0;
2989
2990                 mode = &phy_info->modes[*(phy_info->num_modes)];
2991                 memset(mode, 0, sizeof(*mode));
2992                 *(phy_info->num_modes) += 1;
2993
2994                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2995                           nla_len(nl_band), NULL);
2996
2997                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2998                         mode->ht_capab = nla_get_u16(
2999                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
3000                 }
3001
3002                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
3003                         mode->a_mpdu_params |= nla_get_u8(
3004                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
3005                                 0x03;
3006                 }
3007
3008                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
3009                         mode->a_mpdu_params |= nla_get_u8(
3010                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
3011                                 2;
3012                 }
3013
3014                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
3015                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
3016                         u8 *mcs;
3017                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
3018                         os_memcpy(mode->mcs_set, mcs, 16);
3019                 }
3020
3021                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
3022                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
3023                                   nla_len(nl_freq), freq_policy);
3024                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
3025                                 continue;
3026                         mode->num_channels++;
3027                 }
3028
3029                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
3030                 if (!mode->channels)
3031                         return NL_SKIP;
3032
3033                 idx = 0;
3034
3035                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
3036                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
3037                                   nla_len(nl_freq), freq_policy);
3038                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
3039                                 continue;
3040
3041                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
3042                         mode->channels[idx].flag = 0;
3043
3044                         if (!mode_is_set) {
3045                                 /* crude heuristic */
3046                                 if (mode->channels[idx].freq < 4000)
3047                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
3048                                 else
3049                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
3050                                 mode_is_set = 1;
3051                         }
3052
3053                         /* crude heuristic */
3054                         if (mode->channels[idx].freq < 4000)
3055                                 if (mode->channels[idx].freq == 2484)
3056                                         mode->channels[idx].chan = 14;
3057                                 else
3058                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
3059                         else
3060                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
3061
3062                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
3063                                 mode->channels[idx].flag |=
3064                                         HOSTAPD_CHAN_DISABLED;
3065                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
3066                                 mode->channels[idx].flag |=
3067                                         HOSTAPD_CHAN_PASSIVE_SCAN;
3068                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
3069                                 mode->channels[idx].flag |=
3070                                         HOSTAPD_CHAN_NO_IBSS;
3071                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
3072                                 mode->channels[idx].flag |=
3073                                         HOSTAPD_CHAN_RADAR;
3074
3075                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
3076                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
3077                                 mode->channels[idx].max_tx_power =
3078                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
3079
3080                         idx++;
3081                 }
3082
3083                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
3084                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
3085                                   nla_len(nl_rate), rate_policy);
3086                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
3087                                 continue;
3088                         mode->num_rates++;
3089                 }
3090
3091                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
3092                 if (!mode->rates)
3093                         return NL_SKIP;
3094
3095                 idx = 0;
3096
3097                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
3098                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
3099                                   nla_len(nl_rate), rate_policy);
3100                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
3101                                 continue;
3102                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
3103
3104                         /* crude heuristic */
3105                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
3106                             mode->rates[idx] > 200)
3107                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
3108
3109                         idx++;
3110                 }
3111         }
3112
3113         return NL_SKIP;
3114 }
3115
3116 static struct hostapd_hw_modes *
3117 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
3118 {
3119         u16 m;
3120         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
3121         int i, mode11g_idx = -1;
3122
3123         /* If only 802.11g mode is included, use it to construct matching
3124          * 802.11b mode data. */
3125
3126         for (m = 0; m < *num_modes; m++) {
3127                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
3128                         return modes; /* 802.11b already included */
3129                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
3130                         mode11g_idx = m;
3131         }
3132
3133         if (mode11g_idx < 0)
3134                 return modes; /* 2.4 GHz band not supported at all */
3135
3136         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
3137         if (nmodes == NULL)
3138                 return modes; /* Could not add 802.11b mode */
3139
3140         mode = &nmodes[*num_modes];
3141         os_memset(mode, 0, sizeof(*mode));
3142         (*num_modes)++;
3143         modes = nmodes;
3144
3145         mode->mode = HOSTAPD_MODE_IEEE80211B;
3146
3147         mode11g = &modes[mode11g_idx];
3148         mode->num_channels = mode11g->num_channels;
3149         mode->channels = os_malloc(mode11g->num_channels *
3150                                    sizeof(struct hostapd_channel_data));
3151         if (mode->channels == NULL) {
3152                 (*num_modes)--;
3153                 return modes; /* Could not add 802.11b mode */
3154         }
3155         os_memcpy(mode->channels, mode11g->channels,
3156                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
3157
3158         mode->num_rates = 0;
3159         mode->rates = os_malloc(4 * sizeof(int));
3160         if (mode->rates == NULL) {
3161                 os_free(mode->channels);
3162                 (*num_modes)--;
3163                 return modes; /* Could not add 802.11b mode */
3164         }
3165
3166         for (i = 0; i < mode11g->num_rates; i++) {
3167                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
3168                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
3169                         continue;
3170                 mode->rates[mode->num_rates] = mode11g->rates[i];
3171                 mode->num_rates++;
3172                 if (mode->num_rates == 4)
3173                         break;
3174         }
3175
3176         if (mode->num_rates == 0) {
3177                 os_free(mode->channels);
3178                 os_free(mode->rates);
3179                 (*num_modes)--;
3180                 return modes; /* No 802.11b rates */
3181         }
3182
3183         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
3184                    "information");
3185
3186         return modes;
3187 }
3188
3189
3190 static void nl80211_set_ht40_mode(struct hostapd_hw_modes *mode, int start,
3191                                   int end)
3192 {
3193         int c;
3194
3195         for (c = 0; c < mode->num_channels; c++) {
3196                 struct hostapd_channel_data *chan = &mode->channels[c];
3197                 if (chan->freq - 10 >= start && chan->freq + 10 <= end)
3198                         chan->flag |= HOSTAPD_CHAN_HT40;
3199         }
3200 }
3201
3202
3203 static void nl80211_set_ht40_mode_sec(struct hostapd_hw_modes *mode, int start,
3204                                       int end)
3205 {
3206         int c;
3207
3208         for (c = 0; c < mode->num_channels; c++) {
3209                 struct hostapd_channel_data *chan = &mode->channels[c];
3210                 if (!(chan->flag & HOSTAPD_CHAN_HT40))
3211                         continue;
3212                 if (chan->freq - 30 >= start && chan->freq - 10 <= end)
3213                         chan->flag |= HOSTAPD_CHAN_HT40MINUS;
3214                 if (chan->freq + 10 >= start && chan->freq + 30 <= end)
3215                         chan->flag |= HOSTAPD_CHAN_HT40PLUS;
3216         }
3217 }
3218
3219
3220 static void nl80211_reg_rule_ht40(struct nlattr *tb[],
3221                                   struct phy_info_arg *results)
3222 {
3223         u32 start, end, max_bw;
3224         u16 m;
3225
3226         if (tb[NL80211_ATTR_FREQ_RANGE_START] == NULL ||
3227             tb[NL80211_ATTR_FREQ_RANGE_END] == NULL ||
3228             tb[NL80211_ATTR_FREQ_RANGE_MAX_BW] == NULL)
3229                 return;
3230
3231         start = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]) / 1000;
3232         end = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]) / 1000;
3233         max_bw = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) / 1000;
3234
3235         wpa_printf(MSG_DEBUG, "nl80211: %u-%u @ %u MHz",
3236                    start, end, max_bw);
3237         if (max_bw < 40)
3238                 return;
3239
3240         for (m = 0; m < *results->num_modes; m++) {
3241                 if (!(results->modes[m].ht_capab &
3242                       HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
3243                         continue;
3244                 nl80211_set_ht40_mode(&results->modes[m], start, end);
3245         }
3246 }
3247
3248
3249 static void nl80211_reg_rule_sec(struct nlattr *tb[],
3250                                  struct phy_info_arg *results)
3251 {
3252         u32 start, end, max_bw;
3253         u16 m;
3254
3255         if (tb[NL80211_ATTR_FREQ_RANGE_START] == NULL ||
3256             tb[NL80211_ATTR_FREQ_RANGE_END] == NULL ||
3257             tb[NL80211_ATTR_FREQ_RANGE_MAX_BW] == NULL)
3258                 return;
3259
3260         start = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]) / 1000;
3261         end = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]) / 1000;
3262         max_bw = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) / 1000;
3263
3264         if (max_bw < 20)
3265                 return;
3266
3267         for (m = 0; m < *results->num_modes; m++) {
3268                 if (!(results->modes[m].ht_capab &
3269                       HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
3270                         continue;
3271                 nl80211_set_ht40_mode_sec(&results->modes[m], start, end);
3272         }
3273 }
3274
3275
3276 static int nl80211_get_reg(struct nl_msg *msg, void *arg)
3277 {
3278         struct phy_info_arg *results = arg;
3279         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
3280         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3281         struct nlattr *nl_rule;
3282         struct nlattr *tb_rule[NL80211_FREQUENCY_ATTR_MAX + 1];
3283         int rem_rule;
3284         static struct nla_policy reg_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
3285                 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
3286                 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
3287                 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
3288                 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
3289                 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
3290                 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
3291         };
3292
3293         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3294                   genlmsg_attrlen(gnlh, 0), NULL);
3295         if (!tb_msg[NL80211_ATTR_REG_ALPHA2] ||
3296             !tb_msg[NL80211_ATTR_REG_RULES]) {
3297                 wpa_printf(MSG_DEBUG, "nl80211: No regulatory information "
3298                            "available");
3299                 return NL_SKIP;
3300         }
3301
3302         wpa_printf(MSG_DEBUG, "nl80211: Regulatory information - country=%s",
3303                    (char *) nla_data(tb_msg[NL80211_ATTR_REG_ALPHA2]));
3304
3305         nla_for_each_nested(nl_rule, tb_msg[NL80211_ATTR_REG_RULES], rem_rule)
3306         {
3307                 nla_parse(tb_rule, NL80211_FREQUENCY_ATTR_MAX,
3308                           nla_data(nl_rule), nla_len(nl_rule), reg_policy);
3309                 nl80211_reg_rule_ht40(tb_rule, results);
3310         }
3311
3312         nla_for_each_nested(nl_rule, tb_msg[NL80211_ATTR_REG_RULES], rem_rule)
3313         {
3314                 nla_parse(tb_rule, NL80211_FREQUENCY_ATTR_MAX,
3315                           nla_data(nl_rule), nla_len(nl_rule), reg_policy);
3316                 nl80211_reg_rule_sec(tb_rule, results);
3317         }
3318
3319         return NL_SKIP;
3320 }
3321
3322
3323 static int nl80211_set_ht40_flags(struct wpa_driver_nl80211_data *drv,
3324                                   struct phy_info_arg *results)
3325 {
3326         struct nl_msg *msg;
3327
3328         msg = nlmsg_alloc();
3329         if (!msg)
3330                 return -ENOMEM;
3331
3332         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3333                     0, NL80211_CMD_GET_REG, 0);
3334         return send_and_recv_msgs(drv, msg, nl80211_get_reg, results);
3335 }
3336
3337
3338 static struct hostapd_hw_modes *
3339 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
3340 {
3341         struct i802_bss *bss = priv;
3342         struct wpa_driver_nl80211_data *drv = bss->drv;
3343         struct nl_msg *msg;
3344         struct phy_info_arg result = {
3345                 .num_modes = num_modes,
3346                 .modes = NULL,
3347         };
3348
3349         *num_modes = 0;
3350         *flags = 0;
3351
3352         msg = nlmsg_alloc();
3353         if (!msg)
3354                 return NULL;
3355
3356         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3357                     0, NL80211_CMD_GET_WIPHY, 0);
3358
3359         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3360
3361         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0) {
3362                 nl80211_set_ht40_flags(drv, &result);
3363                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
3364         }
3365  nla_put_failure:
3366         return NULL;
3367 }
3368
3369
3370 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
3371                                          const void *data, size_t len,
3372                                          int encrypt)
3373 {
3374         __u8 rtap_hdr[] = {
3375                 0x00, 0x00, /* radiotap version */
3376                 0x0e, 0x00, /* radiotap length */
3377                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
3378                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
3379                 0x00,       /* padding */
3380                 0x00, 0x00, /* RX and TX flags to indicate that */
3381                 0x00, 0x00, /* this is the injected frame directly */
3382         };
3383         struct iovec iov[2] = {
3384                 {
3385                         .iov_base = &rtap_hdr,
3386                         .iov_len = sizeof(rtap_hdr),
3387                 },
3388                 {
3389                         .iov_base = (void *) data,
3390                         .iov_len = len,
3391                 }
3392         };
3393         struct msghdr msg = {
3394                 .msg_name = NULL,
3395                 .msg_namelen = 0,
3396                 .msg_iov = iov,
3397                 .msg_iovlen = 2,
3398                 .msg_control = NULL,
3399                 .msg_controllen = 0,
3400                 .msg_flags = 0,
3401         };
3402         int res;
3403
3404         if (encrypt)
3405                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
3406
3407         res = sendmsg(drv->monitor_sock, &msg, 0);
3408         if (res < 0) {
3409                 wpa_printf(MSG_INFO, "nl80211: sendmsg: %s", strerror(errno));
3410                 return -1;
3411         }
3412         return 0;
3413 }
3414
3415
3416 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
3417                                         size_t data_len)
3418 {
3419         struct i802_bss *bss = priv;
3420         struct wpa_driver_nl80211_data *drv = bss->drv;
3421         struct ieee80211_mgmt *mgmt;
3422         int encrypt = 1;
3423         u16 fc;
3424
3425         mgmt = (struct ieee80211_mgmt *) data;
3426         fc = le_to_host16(mgmt->frame_control);
3427
3428         if (drv->nlmode == NL80211_IFTYPE_STATION &&
3429             WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
3430             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PROBE_RESP) {
3431                 /*
3432                  * The use of last_mgmt_freq is a bit of a hack,
3433                  * but it works due to the single-threaded nature
3434                  * of wpa_supplicant.
3435                  */
3436                 return nl80211_send_frame_cmd(drv, drv->last_mgmt_freq,
3437                                               data, data_len, NULL);
3438         }
3439
3440         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
3441             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
3442                 /*
3443                  * Only one of the authentication frame types is encrypted.
3444                  * In order for static WEP encryption to work properly (i.e.,
3445                  * to not encrypt the frame), we need to tell mac80211 about
3446                  * the frames that must not be encrypted.
3447                  */
3448                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
3449                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
3450                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
3451                         encrypt = 0;
3452         }
3453
3454         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
3455 }
3456
3457
3458 static int wpa_driver_nl80211_set_beacon(void *priv,
3459                                          const u8 *head, size_t head_len,
3460                                          const u8 *tail, size_t tail_len,
3461                                          int dtim_period, int beacon_int)
3462 {
3463         struct i802_bss *bss = priv;
3464         struct wpa_driver_nl80211_data *drv = bss->drv;
3465         struct nl_msg *msg;
3466         u8 cmd = NL80211_CMD_NEW_BEACON;
3467         int ret;
3468         int beacon_set;
3469         int ifindex = if_nametoindex(bss->ifname);
3470
3471         beacon_set = bss->beacon_set;
3472
3473         msg = nlmsg_alloc();
3474         if (!msg)
3475                 return -ENOMEM;
3476
3477         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
3478                    beacon_set);
3479         if (beacon_set)
3480                 cmd = NL80211_CMD_SET_BEACON;
3481
3482         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3483                     0, cmd, 0);
3484         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3485         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3486         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3487         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
3488         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3489
3490         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3491         if (ret) {
3492                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
3493                            ret, strerror(-ret));
3494         } else {
3495                 bss->beacon_set = 1;
3496         }
3497         return ret;
3498  nla_put_failure:
3499         return -ENOBUFS;
3500 }
3501
3502
3503 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
3504                                        int freq, int ht_enabled,
3505                                        int sec_channel_offset)
3506 {
3507         struct nl_msg *msg;
3508         int ret;
3509
3510         msg = nlmsg_alloc();
3511         if (!msg)
3512                 return -1;
3513
3514         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3515                     NL80211_CMD_SET_WIPHY, 0);
3516
3517         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3518         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
3519         if (ht_enabled) {
3520                 switch (sec_channel_offset) {
3521                 case -1:
3522                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3523                                     NL80211_CHAN_HT40MINUS);
3524                         break;
3525                 case 1:
3526                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3527                                     NL80211_CHAN_HT40PLUS);
3528                         break;
3529                 default:
3530                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3531                                     NL80211_CHAN_HT20);
3532                         break;
3533                 }
3534         }
3535
3536         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3537         if (ret == 0)
3538                 return 0;
3539         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
3540                    "%d (%s)", freq, ret, strerror(-ret));
3541 nla_put_failure:
3542         return -1;
3543 }
3544
3545
3546 static int wpa_driver_nl80211_sta_add(void *priv,
3547                                       struct hostapd_sta_add_params *params)
3548 {
3549         struct i802_bss *bss = priv;
3550         struct wpa_driver_nl80211_data *drv = bss->drv;
3551         struct nl_msg *msg;
3552         int ret = -ENOBUFS;
3553
3554         msg = nlmsg_alloc();
3555         if (!msg)
3556                 return -ENOMEM;
3557
3558         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3559                     0, NL80211_CMD_NEW_STATION, 0);
3560
3561         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
3562         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3563         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3564         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3565                 params->supp_rates);
3566         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3567                     params->listen_interval);
3568         if (params->ht_capabilities) {
3569                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3570                         sizeof(*params->ht_capabilities),
3571                         params->ht_capabilities);
3572         }
3573
3574         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3575         if (ret)
3576                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3577                            "result: %d (%s)", ret, strerror(-ret));
3578         if (ret == -EEXIST)
3579                 ret = 0;
3580  nla_put_failure:
3581         return ret;
3582 }
3583
3584
3585 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
3586 {
3587         struct i802_bss *bss = priv;
3588         struct wpa_driver_nl80211_data *drv = bss->drv;
3589         struct nl_msg *msg;
3590         int ret;
3591
3592         msg = nlmsg_alloc();
3593         if (!msg)
3594                 return -ENOMEM;
3595
3596         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3597                     0, NL80211_CMD_DEL_STATION, 0);
3598
3599         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3600                     if_nametoindex(bss->ifname));
3601         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3602
3603         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3604         if (ret == -ENOENT)
3605                 return 0;
3606         return ret;
3607  nla_put_failure:
3608         return -ENOBUFS;
3609 }
3610
3611
3612 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
3613                                  int ifidx)
3614 {
3615         struct nl_msg *msg;
3616
3617         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
3618
3619 #ifdef HOSTAPD
3620         /* stop listening for EAPOL on this interface */
3621         del_ifidx(drv, ifidx);
3622 #endif /* HOSTAPD */
3623
3624         msg = nlmsg_alloc();
3625         if (!msg)
3626                 goto nla_put_failure;
3627
3628         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3629                     0, NL80211_CMD_DEL_INTERFACE, 0);
3630         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3631
3632         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3633                 return;
3634  nla_put_failure:
3635         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
3636 }
3637
3638
3639 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
3640                                      const char *ifname,
3641                                      enum nl80211_iftype iftype,
3642                                      const u8 *addr, int wds)
3643 {
3644         struct nl_msg *msg, *flags = NULL;
3645         int ifidx;
3646         int ret = -ENOBUFS;
3647
3648         msg = nlmsg_alloc();
3649         if (!msg)
3650                 return -1;
3651
3652         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3653                     0, NL80211_CMD_NEW_INTERFACE, 0);
3654         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3655         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3656         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3657
3658         if (iftype == NL80211_IFTYPE_MONITOR) {
3659                 int err;
3660
3661                 flags = nlmsg_alloc();
3662                 if (!flags)
3663                         goto nla_put_failure;
3664
3665                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3666
3667                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3668
3669                 nlmsg_free(flags);
3670
3671                 if (err)
3672                         goto nla_put_failure;
3673         } else if (wds) {
3674                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
3675         }
3676
3677         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3678         if (ret) {
3679  nla_put_failure:
3680                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
3681                            ifname, ret, strerror(-ret));
3682                 return ret;
3683         }
3684
3685         ifidx = if_nametoindex(ifname);
3686         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
3687                    ifname, ifidx);
3688
3689         if (ifidx <= 0)
3690                 return -1;
3691
3692 #ifdef HOSTAPD
3693         /* start listening for EAPOL on this interface */
3694         add_ifidx(drv, ifidx);
3695 #endif /* HOSTAPD */
3696
3697         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
3698             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
3699                 nl80211_remove_iface(drv, ifidx);
3700                 return -1;
3701         }
3702
3703         return ifidx;
3704 }
3705
3706
3707 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3708                                 const char *ifname, enum nl80211_iftype iftype,
3709                                 const u8 *addr, int wds)
3710 {
3711         int ret;
3712
3713         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
3714
3715         /* if error occured and interface exists already */
3716         if (ret == -ENFILE && if_nametoindex(ifname)) {
3717                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
3718
3719                 /* Try to remove the interface that was already there. */
3720                 nl80211_remove_iface(drv, if_nametoindex(ifname));
3721
3722                 /* Try to create the interface again */
3723                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
3724                                                 wds);
3725         }
3726
3727         if (ret >= 0 && drv->disable_11b_rates)
3728                 nl80211_disable_11b_rates(drv, ret, 1);
3729
3730         return ret;
3731 }
3732
3733
3734 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
3735 {
3736         struct ieee80211_hdr *hdr;
3737         u16 fc;
3738         union wpa_event_data event;
3739
3740         hdr = (struct ieee80211_hdr *) buf;
3741         fc = le_to_host16(hdr->frame_control);
3742
3743         os_memset(&event, 0, sizeof(event));
3744         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
3745         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
3746         event.tx_status.dst = hdr->addr1;
3747         event.tx_status.data = buf;
3748         event.tx_status.data_len = len;
3749         event.tx_status.ack = ok;
3750         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
3751 }
3752
3753
3754 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
3755                              u8 *buf, size_t len)
3756 {
3757         union wpa_event_data event;
3758         os_memset(&event, 0, sizeof(event));
3759         event.rx_from_unknown.frame = buf;
3760         event.rx_from_unknown.len = len;
3761         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
3762 }
3763
3764
3765 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3766                          u8 *buf, size_t len, int datarate, int ssi_signal)
3767 {
3768         struct ieee80211_hdr *hdr;
3769         u16 fc;
3770         union wpa_event_data event;
3771
3772         hdr = (struct ieee80211_hdr *) buf;
3773         fc = le_to_host16(hdr->frame_control);
3774
3775         switch (WLAN_FC_GET_TYPE(fc)) {
3776         case WLAN_FC_TYPE_MGMT:
3777                 os_memset(&event, 0, sizeof(event));
3778                 event.rx_mgmt.frame = buf;
3779                 event.rx_mgmt.frame_len = len;
3780                 event.rx_mgmt.datarate = datarate;
3781                 event.rx_mgmt.ssi_signal = ssi_signal;
3782                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3783                 break;
3784         case WLAN_FC_TYPE_CTRL:
3785                 /* can only get here with PS-Poll frames */
3786                 wpa_printf(MSG_DEBUG, "CTRL");
3787                 from_unknown_sta(drv, buf, len);
3788                 break;
3789         case WLAN_FC_TYPE_DATA:
3790                 from_unknown_sta(drv, buf, len);
3791                 break;
3792         }
3793 }
3794
3795
3796 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3797 {
3798         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3799         int len;
3800         unsigned char buf[3000];
3801         struct ieee80211_radiotap_iterator iter;
3802         int ret;
3803         int datarate = 0, ssi_signal = 0;
3804         int injected = 0, failed = 0, rxflags = 0;
3805
3806         len = recv(sock, buf, sizeof(buf), 0);
3807         if (len < 0) {
3808                 perror("recv");
3809                 return;
3810         }
3811
3812         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3813                 printf("received invalid radiotap frame\n");
3814                 return;
3815         }
3816
3817         while (1) {
3818                 ret = ieee80211_radiotap_iterator_next(&iter);
3819                 if (ret == -ENOENT)
3820                         break;
3821                 if (ret) {
3822                         printf("received invalid radiotap frame (%d)\n", ret);
3823                         return;
3824                 }
3825                 switch (iter.this_arg_index) {
3826                 case IEEE80211_RADIOTAP_FLAGS:
3827                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3828                                 len -= 4;
3829                         break;
3830                 case IEEE80211_RADIOTAP_RX_FLAGS:
3831                         rxflags = 1;
3832                         break;
3833                 case IEEE80211_RADIOTAP_TX_FLAGS:
3834                         injected = 1;
3835                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3836                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3837                         break;
3838                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3839                         break;
3840                 case IEEE80211_RADIOTAP_CHANNEL:
3841                         /* TODO: convert from freq/flags to channel number */
3842                         break;
3843                 case IEEE80211_RADIOTAP_RATE:
3844                         datarate = *iter.this_arg * 5;
3845                         break;
3846                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3847                         ssi_signal = *iter.this_arg;
3848                         break;
3849                 }
3850         }
3851
3852         if (rxflags && injected)
3853                 return;
3854
3855         if (!injected)
3856                 handle_frame(drv, buf + iter.max_length,
3857                              len - iter.max_length, datarate, ssi_signal);
3858         else
3859                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3860                                    len - iter.max_length, !failed);
3861 }
3862
3863
3864 /*
3865  * we post-process the filter code later and rewrite
3866  * this to the offset to the last instruction
3867  */
3868 #define PASS    0xFF
3869 #define FAIL    0xFE
3870
3871 static struct sock_filter msock_filter_insns[] = {
3872         /*
3873          * do a little-endian load of the radiotap length field
3874          */
3875         /* load lower byte into A */
3876         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3877         /* put it into X (== index register) */
3878         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3879         /* load upper byte into A */
3880         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3881         /* left-shift it by 8 */
3882         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3883         /* or with X */
3884         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3885         /* put result into X */
3886         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3887
3888         /*
3889          * Allow management frames through, this also gives us those
3890          * management frames that we sent ourselves with status
3891          */
3892         /* load the lower byte of the IEEE 802.11 frame control field */
3893         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3894         /* mask off frame type and version */
3895         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3896         /* accept frame if it's both 0, fall through otherwise */
3897         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3898
3899         /*
3900          * TODO: add a bit to radiotap RX flags that indicates
3901          * that the sending station is not associated, then
3902          * add a filter here that filters on our DA and that flag
3903          * to allow us to deauth frames to that bad station.
3904          *
3905          * For now allow all To DS data frames through.
3906          */
3907         /* load the IEEE 802.11 frame control field */
3908         BPF_STMT(BPF_LD  | BPF_H | BPF_IND, 0),
3909         /* mask off frame type, version and DS status */
3910         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0F03),
3911         /* accept frame if version 0, type 2 and To DS, fall through otherwise
3912          */
3913         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0801, PASS, 0),
3914
3915 #if 0
3916         /*
3917          * drop non-data frames
3918          */
3919         /* load the lower byte of the frame control field */
3920         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3921         /* mask off QoS bit */
3922         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3923         /* drop non-data frames */
3924         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3925 #endif
3926         /* load the upper byte of the frame control field */
3927         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3928         /* mask off toDS/fromDS */
3929         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3930         /* accept WDS frames */
3931         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3932
3933         /*
3934          * add header length to index
3935          */
3936         /* load the lower byte of the frame control field */
3937         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3938         /* mask off QoS bit */
3939         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3940         /* right shift it by 6 to give 0 or 2 */
3941         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3942         /* add data frame header length */
3943         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3944         /* add index, was start of 802.11 header */
3945         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3946         /* move to index, now start of LL header */
3947         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3948
3949         /*
3950          * Accept empty data frames, we use those for
3951          * polling activity.
3952          */
3953         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3954         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3955
3956         /*
3957          * Accept EAPOL frames
3958          */
3959         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3960         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3961         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3962         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3963
3964         /* keep these last two statements or change the code below */
3965         /* return 0 == "DROP" */
3966         BPF_STMT(BPF_RET | BPF_K, 0),
3967         /* return ~0 == "keep all" */
3968         BPF_STMT(BPF_RET | BPF_K, ~0),
3969 };
3970
3971 static struct sock_fprog msock_filter = {
3972         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3973         .filter = msock_filter_insns,
3974 };
3975
3976
3977 static int add_monitor_filter(int s)
3978 {
3979         int idx;
3980
3981         /* rewrite all PASS/FAIL jump offsets */
3982         for (idx = 0; idx < msock_filter.len; idx++) {
3983                 struct sock_filter *insn = &msock_filter_insns[idx];
3984
3985                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3986                         if (insn->code == (BPF_JMP|BPF_JA)) {
3987                                 if (insn->k == PASS)
3988                                         insn->k = msock_filter.len - idx - 2;
3989                                 else if (insn->k == FAIL)
3990                                         insn->k = msock_filter.len - idx - 3;
3991                         }
3992
3993                         if (insn->jt == PASS)
3994                                 insn->jt = msock_filter.len - idx - 2;
3995                         else if (insn->jt == FAIL)
3996                                 insn->jt = msock_filter.len - idx - 3;
3997
3998                         if (insn->jf == PASS)
3999                                 insn->jf = msock_filter.len - idx - 2;
4000                         else if (insn->jf == FAIL)
4001                                 insn->jf = msock_filter.len - idx - 3;
4002                 }
4003         }
4004
4005         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
4006                        &msock_filter, sizeof(msock_filter))) {
4007                 perror("SO_ATTACH_FILTER");
4008                 return -1;
4009         }
4010
4011         return 0;
4012 }
4013
4014
4015 static void nl80211_remove_monitor_interface(
4016         struct wpa_driver_nl80211_data *drv)
4017 {
4018         if (drv->monitor_ifidx >= 0) {
4019                 nl80211_remove_iface(drv, drv->monitor_ifidx);
4020                 drv->monitor_ifidx = -1;
4021         }
4022         if (drv->monitor_sock >= 0) {
4023                 eloop_unregister_read_sock(drv->monitor_sock);
4024                 close(drv->monitor_sock);
4025                 drv->monitor_sock = -1;
4026         }
4027 }
4028
4029
4030 static int
4031 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
4032 {
4033         char buf[IFNAMSIZ];
4034         struct sockaddr_ll ll;
4035         int optval;
4036         socklen_t optlen;
4037
4038         snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
4039         buf[IFNAMSIZ - 1] = '\0';
4040
4041         drv->monitor_ifidx =
4042                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
4043                                      0);
4044
4045         if (drv->monitor_ifidx < 0)
4046                 return -1;
4047
4048         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
4049                 goto error;
4050
4051         memset(&ll, 0, sizeof(ll));
4052         ll.sll_family = AF_PACKET;
4053         ll.sll_ifindex = drv->monitor_ifidx;
4054         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
4055         if (drv->monitor_sock < 0) {
4056                 perror("socket[PF_PACKET,SOCK_RAW]");
4057                 goto error;
4058         }
4059
4060         if (add_monitor_filter(drv->monitor_sock)) {
4061                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
4062                            "interface; do filtering in user space");
4063                 /* This works, but will cost in performance. */
4064         }
4065
4066         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
4067                 perror("monitor socket bind");
4068                 goto error;
4069         }
4070
4071         optlen = sizeof(optval);
4072         optval = 20;
4073         if (setsockopt
4074             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
4075                 perror("Failed to set socket priority");
4076                 goto error;
4077         }
4078
4079         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
4080                                      drv, NULL)) {
4081                 printf("Could not register monitor read socket\n");
4082                 goto error;
4083         }
4084
4085         return 0;
4086  error:
4087         nl80211_remove_monitor_interface(drv);
4088         return -1;
4089 }
4090
4091
4092 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
4093
4094 static int wpa_driver_nl80211_hapd_send_eapol(
4095         void *priv, const u8 *addr, const u8 *data,
4096         size_t data_len, int encrypt, const u8 *own_addr)
4097 {
4098         struct i802_bss *bss = priv;
4099         struct wpa_driver_nl80211_data *drv = bss->drv;
4100         struct ieee80211_hdr *hdr;
4101         size_t len;
4102         u8 *pos;
4103         int res;
4104 #if 0 /* FIX */
4105         int qos = sta->flags & WPA_STA_WMM;
4106 #else
4107         int qos = 0;
4108 #endif
4109
4110         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
4111                 data_len;
4112         hdr = os_zalloc(len);
4113         if (hdr == NULL) {
4114                 printf("malloc() failed for i802_send_data(len=%lu)\n",
4115                        (unsigned long) len);
4116                 return -1;
4117         }
4118
4119         hdr->frame_control =
4120                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
4121         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
4122         if (encrypt)
4123                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
4124 #if 0 /* To be enabled if qos determination is added above */
4125         if (qos) {
4126                 hdr->frame_control |=
4127                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
4128         }
4129 #endif
4130
4131         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
4132         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
4133         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
4134         pos = (u8 *) (hdr + 1);
4135
4136 #if 0 /* To be enabled if qos determination is added above */
4137         if (qos) {
4138                 /* add an empty QoS header if needed */
4139                 pos[0] = 0;
4140                 pos[1] = 0;
4141                 pos += 2;
4142         }
4143 #endif
4144
4145         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
4146         pos += sizeof(rfc1042_header);
4147         WPA_PUT_BE16(pos, ETH_P_PAE);
4148         pos += 2;
4149         memcpy(pos, data, data_len);
4150
4151         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
4152         if (res < 0) {
4153                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
4154                            "failed: %d (%s)",
4155                            (unsigned long) len, errno, strerror(errno));
4156         }
4157         os_free(hdr);
4158
4159         return res;
4160 }
4161
4162
4163 static u32 sta_flags_nl80211(int flags)
4164 {
4165         u32 f = 0;
4166
4167         if (flags & WPA_STA_AUTHORIZED)
4168                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
4169         if (flags & WPA_STA_WMM)
4170                 f |= BIT(NL80211_STA_FLAG_WME);
4171         if (flags & WPA_STA_SHORT_PREAMBLE)
4172                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
4173         if (flags & WPA_STA_MFP)
4174                 f |= BIT(NL80211_STA_FLAG_MFP);
4175
4176         return f;
4177 }
4178
4179
4180 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
4181                                             int total_flags,
4182                                             int flags_or, int flags_and)
4183 {
4184         struct i802_bss *bss = priv;
4185         struct wpa_driver_nl80211_data *drv = bss->drv;
4186         struct nl_msg *msg, *flags = NULL;
4187         struct nl80211_sta_flag_update upd;
4188
4189         msg = nlmsg_alloc();
4190         if (!msg)
4191                 return -ENOMEM;
4192
4193         flags = nlmsg_alloc();
4194         if (!flags) {
4195                 nlmsg_free(msg);
4196                 return -ENOMEM;
4197         }
4198
4199         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4200                     0, NL80211_CMD_SET_STATION, 0);
4201
4202         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4203                     if_nametoindex(bss->ifname));
4204         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4205
4206         /*
4207          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
4208          * can be removed eventually.
4209          */
4210         if (total_flags & WPA_STA_AUTHORIZED)
4211                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
4212
4213         if (total_flags & WPA_STA_WMM)
4214                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
4215
4216         if (total_flags & WPA_STA_SHORT_PREAMBLE)
4217                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
4218
4219         if (total_flags & WPA_STA_MFP)
4220                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
4221
4222         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
4223                 goto nla_put_failure;
4224
4225         os_memset(&upd, 0, sizeof(upd));
4226         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
4227         upd.set = sta_flags_nl80211(flags_or);
4228         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4229
4230         nlmsg_free(flags);
4231
4232         return send_and_recv_msgs(drv, msg, NULL, NULL);
4233  nla_put_failure:
4234         nlmsg_free(flags);
4235         return -ENOBUFS;
4236 }
4237
4238
4239 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
4240                                  struct wpa_driver_associate_params *params)
4241 {
4242         if (params->p2p)
4243                 wpa_printf(MSG_DEBUG, "nl80211: Setup AP operations for P2P "
4244                            "group (GO)");
4245         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
4246             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
4247                 nl80211_remove_monitor_interface(drv);
4248                 return -1;
4249         }
4250
4251         /* TODO: setup monitor interface (and add code somewhere to remove this
4252          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
4253
4254         return 0;
4255 }
4256
4257
4258 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
4259 {
4260         struct nl_msg *msg;
4261         int ret = -1;
4262
4263         msg = nlmsg_alloc();
4264         if (!msg)
4265                 return -1;
4266
4267         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4268                     NL80211_CMD_LEAVE_IBSS, 0);
4269         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4270         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4271         msg = NULL;
4272         if (ret) {
4273                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
4274                            "(%s)", ret, strerror(-ret));
4275                 goto nla_put_failure;
4276         }
4277
4278         ret = 0;
4279         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
4280
4281 nla_put_failure:
4282         nlmsg_free(msg);
4283         return ret;
4284 }
4285
4286
4287 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
4288                                    struct wpa_driver_associate_params *params)
4289 {
4290         struct nl_msg *msg;
4291         int ret = -1;
4292         int count = 0;
4293
4294         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
4295
4296         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
4297                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
4298                            "IBSS mode");
4299                 return -1;
4300         }
4301
4302 retry:
4303         msg = nlmsg_alloc();
4304         if (!msg)
4305                 return -1;
4306
4307         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4308                     NL80211_CMD_JOIN_IBSS, 0);
4309         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4310
4311         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
4312                 goto nla_put_failure;
4313
4314         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
4315                           params->ssid, params->ssid_len);
4316         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
4317                 params->ssid);
4318         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
4319         drv->ssid_len = params->ssid_len;
4320
4321         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
4322         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
4323
4324         ret = nl80211_set_conn_keys(params, msg);
4325         if (ret)
4326                 goto nla_put_failure;
4327
4328         if (params->wpa_ie) {
4329                 wpa_hexdump(MSG_DEBUG,
4330                             "  * Extra IEs for Beacon/Probe Response frames",
4331                             params->wpa_ie, params->wpa_ie_len);
4332                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
4333                         params->wpa_ie);
4334         }
4335
4336         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4337         msg = NULL;
4338         if (ret) {
4339                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
4340                            ret, strerror(-ret));
4341                 count++;
4342                 if (ret == -EALREADY && count == 1) {
4343                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
4344                                    "forced leave");
4345                         nl80211_leave_ibss(drv);
4346                         nlmsg_free(msg);
4347                         goto retry;
4348                 }
4349
4350                 goto nla_put_failure;
4351         }
4352         ret = 0;
4353         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
4354
4355 nla_put_failure:
4356         nlmsg_free(msg);
4357         return ret;
4358 }
4359
4360
4361 static int wpa_driver_nl80211_connect(
4362         struct wpa_driver_nl80211_data *drv,
4363         struct wpa_driver_associate_params *params)
4364 {
4365         struct nl_msg *msg;
4366         enum nl80211_auth_type type;
4367         int ret = 0;
4368
4369         msg = nlmsg_alloc();
4370         if (!msg)
4371                 return -1;
4372
4373         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
4374         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4375                     NL80211_CMD_CONNECT, 0);
4376
4377         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4378         if (params->bssid) {
4379                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
4380                            MAC2STR(params->bssid));
4381                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
4382         }
4383         if (params->freq) {
4384                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
4385                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
4386         }
4387         if (params->ssid) {
4388                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
4389                                   params->ssid, params->ssid_len);
4390                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
4391                         params->ssid);
4392                 if (params->ssid_len > sizeof(drv->ssid))
4393                         goto nla_put_failure;
4394                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
4395                 drv->ssid_len = params->ssid_len;
4396         }
4397         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
4398         if (params->wpa_ie)
4399                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
4400                         params->wpa_ie);
4401
4402         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
4403                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
4404         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
4405                 type = NL80211_AUTHTYPE_SHARED_KEY;
4406         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
4407                 type = NL80211_AUTHTYPE_NETWORK_EAP;
4408         else if (params->auth_alg & WPA_AUTH_ALG_FT)
4409                 type = NL80211_AUTHTYPE_FT;
4410         else
4411                 goto nla_put_failure;
4412
4413         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
4414         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
4415
4416         if (params->wpa_ie && params->wpa_ie_len) {
4417                 enum nl80211_wpa_versions ver;
4418
4419                 if (params->wpa_ie[0] == WLAN_EID_RSN)
4420                         ver = NL80211_WPA_VERSION_2;
4421                 else
4422                         ver = NL80211_WPA_VERSION_1;
4423
4424                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
4425                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
4426         }
4427
4428         if (params->pairwise_suite != CIPHER_NONE) {
4429                 int cipher;
4430
4431                 switch (params->pairwise_suite) {
4432                 case CIPHER_WEP40:
4433                         cipher = WLAN_CIPHER_SUITE_WEP40;
4434                         break;
4435                 case CIPHER_WEP104:
4436                         cipher = WLAN_CIPHER_SUITE_WEP104;
4437                         break;
4438                 case CIPHER_CCMP:
4439                         cipher = WLAN_CIPHER_SUITE_CCMP;
4440                         break;
4441                 case CIPHER_TKIP:
4442                 default:
4443                         cipher = WLAN_CIPHER_SUITE_TKIP;
4444                         break;
4445                 }
4446                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
4447         }
4448
4449         if (params->group_suite != CIPHER_NONE) {
4450                 int cipher;
4451
4452                 switch (params->group_suite) {
4453                 case CIPHER_WEP40:
4454                         cipher = WLAN_CIPHER_SUITE_WEP40;
4455                         break;
4456                 case CIPHER_WEP104:
4457                         cipher = WLAN_CIPHER_SUITE_WEP104;
4458                         break;
4459                 case CIPHER_CCMP:
4460                         cipher = WLAN_CIPHER_SUITE_CCMP;
4461                         break;
4462                 case CIPHER_TKIP:
4463                 default:
4464                         cipher = WLAN_CIPHER_SUITE_TKIP;
4465                         break;
4466                 }
4467                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
4468         }
4469
4470         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
4471             params->key_mgmt_suite == KEY_MGMT_PSK) {
4472                 int mgmt = WLAN_AKM_SUITE_PSK;
4473
4474                 switch (params->key_mgmt_suite) {
4475                 case KEY_MGMT_802_1X:
4476                         mgmt = WLAN_AKM_SUITE_8021X;
4477                         break;
4478                 case KEY_MGMT_PSK:
4479                 default:
4480                         mgmt = WLAN_AKM_SUITE_PSK;
4481                         break;
4482                 }
4483                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
4484         }
4485
4486         ret = nl80211_set_conn_keys(params, msg);
4487         if (ret)
4488                 goto nla_put_failure;
4489
4490         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4491         msg = NULL;
4492         if (ret) {
4493                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
4494                            "(%s)", ret, strerror(-ret));
4495                 goto nla_put_failure;
4496         }
4497         ret = 0;
4498         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
4499
4500 nla_put_failure:
4501         nlmsg_free(msg);
4502         return ret;
4503
4504 }
4505
4506
4507 static int wpa_driver_nl80211_associate(
4508         void *priv, struct wpa_driver_associate_params *params)
4509 {
4510         struct i802_bss *bss = priv;
4511         struct wpa_driver_nl80211_data *drv = bss->drv;
4512         int ret = -1;
4513         struct nl_msg *msg;
4514
4515         if (params->mode == IEEE80211_MODE_AP)
4516                 return wpa_driver_nl80211_ap(drv, params);
4517
4518         if (params->mode == IEEE80211_MODE_IBSS)
4519                 return wpa_driver_nl80211_ibss(drv, params);
4520
4521         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
4522                 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
4523                         return -1;
4524                 return wpa_driver_nl80211_connect(drv, params);
4525         }
4526
4527         drv->associated = 0;
4528
4529         msg = nlmsg_alloc();
4530         if (!msg)
4531                 return -1;
4532
4533         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
4534                    drv->ifindex);
4535         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4536                     NL80211_CMD_ASSOCIATE, 0);
4537
4538         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4539         if (params->bssid) {
4540                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
4541                            MAC2STR(params->bssid));
4542                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
4543         }
4544         if (params->freq) {
4545                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
4546                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
4547                 drv->assoc_freq = params->freq;
4548         } else
4549                 drv->assoc_freq = 0;
4550         if (params->ssid) {
4551                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
4552                                   params->ssid, params->ssid_len);
4553                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
4554                         params->ssid);
4555                 if (params->ssid_len > sizeof(drv->ssid))
4556                         goto nla_put_failure;
4557                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
4558                 drv->ssid_len = params->ssid_len;
4559         }
4560         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
4561         if (params->wpa_ie)
4562                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
4563                         params->wpa_ie);
4564
4565         if (params->pairwise_suite != CIPHER_NONE) {
4566                 int cipher;
4567
4568                 switch (params->pairwise_suite) {
4569                 case CIPHER_WEP40:
4570                         cipher = WLAN_CIPHER_SUITE_WEP40;
4571                         break;
4572                 case CIPHER_WEP104:
4573                         cipher = WLAN_CIPHER_SUITE_WEP104;
4574                         break;
4575                 case CIPHER_CCMP:
4576                         cipher = WLAN_CIPHER_SUITE_CCMP;
4577                         break;
4578                 case CIPHER_TKIP:
4579                 default:
4580                         cipher = WLAN_CIPHER_SUITE_TKIP;
4581                         break;
4582                 }
4583                 wpa_printf(MSG_DEBUG, "  * pairwise=0x%x\n", cipher);
4584                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
4585         }
4586
4587         if (params->group_suite != CIPHER_NONE) {
4588                 int cipher;
4589
4590                 switch (params->group_suite) {
4591                 case CIPHER_WEP40:
4592                         cipher = WLAN_CIPHER_SUITE_WEP40;
4593                         break;
4594                 case CIPHER_WEP104:
4595                         cipher = WLAN_CIPHER_SUITE_WEP104;
4596                         break;
4597                 case CIPHER_CCMP:
4598                         cipher = WLAN_CIPHER_SUITE_CCMP;
4599                         break;
4600                 case CIPHER_TKIP:
4601                 default:
4602                         cipher = WLAN_CIPHER_SUITE_TKIP;
4603                         break;
4604                 }
4605                 wpa_printf(MSG_DEBUG, "  * group=0x%x\n", cipher);
4606                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
4607         }
4608
4609 #ifdef CONFIG_IEEE80211W
4610         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
4611                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
4612 #endif /* CONFIG_IEEE80211W */
4613
4614         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
4615
4616         if (params->prev_bssid) {
4617                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
4618                            MAC2STR(params->prev_bssid));
4619                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
4620                         params->prev_bssid);
4621         }
4622
4623         if (params->p2p)
4624                 wpa_printf(MSG_DEBUG, "  * P2P group");
4625
4626         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4627         msg = NULL;
4628         if (ret) {
4629                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
4630                            "(%s)", ret, strerror(-ret));
4631                 nl80211_dump_scan(drv);
4632                 goto nla_put_failure;
4633         }
4634         ret = 0;
4635         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
4636                    "successfully");
4637
4638 nla_put_failure:
4639         nlmsg_free(msg);
4640         return ret;
4641 }
4642
4643
4644 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
4645                             int ifindex, int mode)
4646 {
4647         struct nl_msg *msg;
4648         int ret = -ENOBUFS;
4649
4650         msg = nlmsg_alloc();
4651         if (!msg)
4652                 return -ENOMEM;
4653
4654         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4655                     0, NL80211_CMD_SET_INTERFACE, 0);
4656         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4657         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
4658
4659         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4660         if (!ret)
4661                 return 0;
4662 nla_put_failure:
4663         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
4664                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
4665         return ret;
4666 }
4667
4668
4669 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
4670 {
4671         struct i802_bss *bss = priv;
4672         struct wpa_driver_nl80211_data *drv = bss->drv;
4673         int ret = -1;
4674         int nlmode;
4675         int i;
4676
4677         switch (mode) {
4678         case 0:
4679                 nlmode = NL80211_IFTYPE_STATION;
4680                 break;
4681         case 1:
4682                 nlmode = NL80211_IFTYPE_ADHOC;
4683                 break;
4684         case 2:
4685                 nlmode = NL80211_IFTYPE_AP;
4686                 break;
4687         default:
4688                 return -1;
4689         }
4690
4691         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
4692                 drv->nlmode = nlmode;
4693                 ret = 0;
4694                 goto done;
4695         }
4696
4697         if (nlmode == drv->nlmode) {
4698                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
4699                            "requested mode - ignore error");
4700                 ret = 0;
4701                 goto done; /* Already in the requested mode */
4702         }
4703
4704         /* mac80211 doesn't allow mode changes while the device is up, so
4705          * take the device down, try to set the mode again, and bring the
4706          * device back up.
4707          */
4708         wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
4709                    "interface down");
4710         for (i = 0; i < 10; i++) {
4711                 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) ==
4712                     0) {
4713                         /* Try to set the mode again while the interface is
4714                          * down */
4715                         ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
4716                         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname,
4717                                                   1))
4718                                 ret = -1;
4719                         if (!ret)
4720                                 break;
4721                 } else
4722                         wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
4723                                    "interface down");
4724                 os_sleep(0, 100000);
4725         }
4726
4727         if (!ret) {
4728                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
4729                            "interface is down");
4730                 drv->nlmode = nlmode;
4731         }
4732
4733 done:
4734         if (!ret && nlmode == NL80211_IFTYPE_AP) {
4735                 /* Setup additional AP mode functionality if needed */
4736                 if (drv->monitor_ifidx < 0 &&
4737                     nl80211_create_monitor_interface(drv))
4738                         return -1;
4739         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
4740                 /* Remove additional AP mode functionality */
4741                 nl80211_remove_monitor_interface(drv);
4742                 bss->beacon_set = 0;
4743         }
4744
4745         if (ret)
4746                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
4747                            "from %d failed", nlmode, drv->nlmode);
4748
4749         return ret;
4750 }
4751
4752
4753 static int wpa_driver_nl80211_get_capa(void *priv,
4754                                        struct wpa_driver_capa *capa)
4755 {
4756         struct i802_bss *bss = priv;
4757         struct wpa_driver_nl80211_data *drv = bss->drv;
4758         if (!drv->has_capability)
4759                 return -1;
4760         os_memcpy(capa, &drv->capa, sizeof(*capa));
4761         return 0;
4762 }
4763
4764
4765 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
4766 {
4767         struct i802_bss *bss = priv;
4768         struct wpa_driver_nl80211_data *drv = bss->drv;
4769
4770         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
4771                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
4772         drv->operstate = state;
4773         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
4774                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
4775 }
4776
4777
4778 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
4779 {
4780         struct i802_bss *bss = priv;
4781         struct wpa_driver_nl80211_data *drv = bss->drv;
4782         struct nl_msg *msg;
4783         struct nl80211_sta_flag_update upd;
4784
4785         msg = nlmsg_alloc();
4786         if (!msg)
4787                 return -ENOMEM;
4788
4789         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4790                     0, NL80211_CMD_SET_STATION, 0);
4791
4792         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4793                     if_nametoindex(bss->ifname));
4794         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
4795
4796         os_memset(&upd, 0, sizeof(upd));
4797         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
4798         if (authorized)
4799                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
4800         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4801
4802         return send_and_recv_msgs(drv, msg, NULL, NULL);
4803  nla_put_failure:
4804         return -ENOBUFS;
4805 }
4806
4807
4808 #ifdef HOSTAPD
4809
4810 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4811 {
4812         int i;
4813         int *old;
4814
4815         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
4816                    ifidx);
4817         for (i = 0; i < drv->num_if_indices; i++) {
4818                 if (drv->if_indices[i] == 0) {
4819                         drv->if_indices[i] = ifidx;
4820                         return;
4821                 }
4822         }
4823
4824         if (drv->if_indices != drv->default_if_indices)
4825                 old = drv->if_indices;
4826         else
4827                 old = NULL;
4828
4829         drv->if_indices = os_realloc(old,
4830                                      sizeof(int) * (drv->num_if_indices + 1));
4831         if (!drv->if_indices) {
4832                 if (!old)
4833                         drv->if_indices = drv->default_if_indices;
4834                 else
4835                         drv->if_indices = old;
4836                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4837                            "interfaces");
4838                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4839                 return;
4840         } else if (!old)
4841                 os_memcpy(drv->if_indices, drv->default_if_indices,
4842                           sizeof(drv->default_if_indices));
4843         drv->if_indices[drv->num_if_indices] = ifidx;
4844         drv->num_if_indices++;
4845 }
4846
4847
4848 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4849 {
4850         int i;
4851
4852         for (i = 0; i < drv->num_if_indices; i++) {
4853                 if (drv->if_indices[i] == ifidx) {
4854                         drv->if_indices[i] = 0;
4855                         break;
4856                 }
4857         }
4858 }
4859
4860
4861 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4862 {
4863         int i;
4864
4865         for (i = 0; i < drv->num_if_indices; i++)
4866                 if (drv->if_indices[i] == ifidx)
4867                         return 1;
4868
4869         return 0;
4870 }
4871
4872
4873 static inline int min_int(int a, int b)
4874 {
4875         if (a < b)
4876                 return a;
4877         return b;
4878 }
4879
4880
4881 static int get_key_handler(struct nl_msg *msg, void *arg)
4882 {
4883         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4884         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4885
4886         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4887                   genlmsg_attrlen(gnlh, 0), NULL);
4888
4889         /*
4890          * TODO: validate the key index and mac address!
4891          * Otherwise, there's a race condition as soon as
4892          * the kernel starts sending key notifications.
4893          */
4894
4895         if (tb[NL80211_ATTR_KEY_SEQ])
4896                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4897                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4898         return NL_SKIP;
4899 }
4900
4901
4902 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4903                            int idx, u8 *seq)
4904 {
4905         struct i802_bss *bss = priv;
4906         struct wpa_driver_nl80211_data *drv = bss->drv;
4907         struct nl_msg *msg;
4908
4909         msg = nlmsg_alloc();
4910         if (!msg)
4911                 return -ENOMEM;
4912
4913         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4914                     0, NL80211_CMD_GET_KEY, 0);
4915
4916         if (addr)
4917                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4918         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4919         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4920
4921         memset(seq, 0, 6);
4922
4923         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4924  nla_put_failure:
4925         return -ENOBUFS;
4926 }
4927
4928
4929 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4930                               int mode)
4931 {
4932         struct i802_bss *bss = priv;
4933         struct wpa_driver_nl80211_data *drv = bss->drv;
4934         struct nl_msg *msg;
4935         u8 rates[NL80211_MAX_SUPP_RATES];
4936         u8 rates_len = 0;
4937         int i;
4938
4939         msg = nlmsg_alloc();
4940         if (!msg)
4941                 return -ENOMEM;
4942
4943         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4944                     NL80211_CMD_SET_BSS, 0);
4945
4946         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4947                 rates[rates_len++] = basic_rates[i] / 5;
4948
4949         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4950
4951         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4952
4953         return send_and_recv_msgs(drv, msg, NULL, NULL);
4954  nla_put_failure:
4955         return -ENOBUFS;
4956 }
4957
4958 #endif /* HOSTAPD */
4959
4960
4961 /* Set kernel driver on given frequency (MHz) */
4962 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4963 {
4964         struct i802_bss *bss = priv;
4965         struct wpa_driver_nl80211_data *drv = bss->drv;
4966         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4967                                            freq->sec_channel_offset);
4968 }
4969
4970
4971 #ifdef HOSTAPD
4972
4973 static int i802_set_rts(void *priv, int rts)
4974 {
4975         struct i802_bss *bss = priv;
4976         struct wpa_driver_nl80211_data *drv = bss->drv;
4977         struct nl_msg *msg;
4978         int ret = -ENOBUFS;
4979         u32 val;
4980
4981         msg = nlmsg_alloc();
4982         if (!msg)
4983                 return -ENOMEM;
4984
4985         if (rts >= 2347)
4986                 val = (u32) -1;
4987         else
4988                 val = rts;
4989
4990         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4991                     0, NL80211_CMD_SET_WIPHY, 0);
4992         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4993         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4994
4995         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4996         if (!ret)
4997                 return 0;
4998 nla_put_failure:
4999         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
5000                    "%d (%s)", rts, ret, strerror(-ret));
5001         return ret;
5002 }
5003
5004
5005 static int i802_set_frag(void *priv, int frag)
5006 {
5007         struct i802_bss *bss = priv;
5008         struct wpa_driver_nl80211_data *drv = bss->drv;
5009         struct nl_msg *msg;
5010         int ret = -ENOBUFS;
5011         u32 val;
5012
5013         msg = nlmsg_alloc();
5014         if (!msg)
5015                 return -ENOMEM;
5016
5017         if (frag >= 2346)
5018                 val = (u32) -1;
5019         else
5020                 val = frag;
5021
5022         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5023                     0, NL80211_CMD_SET_WIPHY, 0);
5024         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5025         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
5026
5027         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5028         if (!ret)
5029                 return 0;
5030 nla_put_failure:
5031         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
5032                    "%d: %d (%s)", frag, ret, strerror(-ret));
5033         return ret;
5034 }
5035
5036
5037 static int i802_flush(void *priv)
5038 {
5039         struct i802_bss *bss = priv;
5040         struct wpa_driver_nl80211_data *drv = bss->drv;
5041         struct nl_msg *msg;
5042
5043         msg = nlmsg_alloc();
5044         if (!msg)
5045                 return -1;
5046
5047         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5048                     0, NL80211_CMD_DEL_STATION, 0);
5049
5050         /*
5051          * XXX: FIX! this needs to flush all VLANs too
5052          */
5053         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
5054                     if_nametoindex(bss->ifname));
5055
5056         return send_and_recv_msgs(drv, msg, NULL, NULL);
5057  nla_put_failure:
5058         return -ENOBUFS;
5059 }
5060
5061
5062 static int get_sta_handler(struct nl_msg *msg, void *arg)
5063 {
5064         struct nlattr *tb[NL80211_ATTR_MAX + 1];
5065         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5066         struct hostap_sta_driver_data *data = arg;
5067         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
5068         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
5069                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
5070                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
5071                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
5072                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
5073                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
5074         };
5075
5076         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
5077                   genlmsg_attrlen(gnlh, 0), NULL);
5078
5079         /*
5080          * TODO: validate the interface and mac address!
5081          * Otherwise, there's a race condition as soon as
5082          * the kernel starts sending station notifications.
5083          */
5084
5085         if (!tb[NL80211_ATTR_STA_INFO]) {
5086                 wpa_printf(MSG_DEBUG, "sta stats missing!");
5087                 return NL_SKIP;
5088         }
5089         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
5090                              tb[NL80211_ATTR_STA_INFO],
5091                              stats_policy)) {
5092                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
5093                 return NL_SKIP;
5094         }
5095
5096         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
5097                 data->inactive_msec =
5098                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
5099         if (stats[NL80211_STA_INFO_RX_BYTES])
5100                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
5101         if (stats[NL80211_STA_INFO_TX_BYTES])
5102                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
5103         if (stats[NL80211_STA_INFO_RX_PACKETS])
5104                 data->rx_packets =
5105                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
5106         if (stats[NL80211_STA_INFO_TX_PACKETS])
5107                 data->tx_packets =
5108                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
5109
5110         return NL_SKIP;
5111 }
5112
5113 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
5114                               const u8 *addr)
5115 {
5116         struct i802_bss *bss = priv;
5117         struct wpa_driver_nl80211_data *drv = bss->drv;
5118         struct nl_msg *msg;
5119
5120         os_memset(data, 0, sizeof(*data));
5121         msg = nlmsg_alloc();
5122         if (!msg)
5123                 return -ENOMEM;
5124
5125         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5126                     0, NL80211_CMD_GET_STATION, 0);
5127
5128         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5129         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
5130
5131         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
5132  nla_put_failure:
5133         return -ENOBUFS;
5134 }
5135
5136
5137 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
5138                                     int cw_min, int cw_max, int burst_time)
5139 {
5140         struct i802_bss *bss = priv;
5141         struct wpa_driver_nl80211_data *drv = bss->drv;
5142         struct nl_msg *msg;
5143         struct nlattr *txq, *params;
5144
5145         msg = nlmsg_alloc();
5146         if (!msg)
5147                 return -1;
5148
5149         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5150                     0, NL80211_CMD_SET_WIPHY, 0);
5151
5152         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
5153
5154         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
5155         if (!txq)
5156                 goto nla_put_failure;
5157
5158         /* We are only sending parameters for a single TXQ at a time */
5159         params = nla_nest_start(msg, 1);
5160         if (!params)
5161                 goto nla_put_failure;
5162
5163         switch (queue) {
5164         case 0:
5165                 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_VO);
5166                 break;
5167         case 1:
5168                 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_VI);
5169                 break;
5170         case 2:
5171                 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_BE);
5172                 break;
5173         case 3:
5174                 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_BK);
5175                 break;
5176         }
5177         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
5178          * 32 usec, so need to convert the value here. */
5179         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
5180         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
5181         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
5182         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
5183
5184         nla_nest_end(msg, params);
5185
5186         nla_nest_end(msg, txq);
5187
5188         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
5189                 return 0;
5190  nla_put_failure:
5191         return -1;
5192 }
5193
5194
5195 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
5196 {
5197         struct i802_bss *bss = priv;
5198         struct wpa_driver_nl80211_data *drv = bss->drv;
5199         struct nl_msg *msg;
5200
5201         msg = nlmsg_alloc();
5202         if (!msg)
5203                 return -ENOMEM;
5204
5205         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5206                     NL80211_CMD_SET_BSS, 0);
5207
5208         if (cts >= 0)
5209                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
5210         if (preamble >= 0)
5211                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
5212         if (slot >= 0)
5213                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
5214
5215         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
5216
5217         return send_and_recv_msgs(drv, msg, NULL, NULL);
5218  nla_put_failure:
5219         return -ENOBUFS;
5220 }
5221
5222
5223 static int i802_set_cts_protect(void *priv, int value)
5224 {
5225         return i802_set_bss(priv, value, -1, -1);
5226 }
5227
5228
5229 static int i802_set_preamble(void *priv, int value)
5230 {
5231         return i802_set_bss(priv, -1, value, -1);
5232 }
5233
5234
5235 static int i802_set_short_slot_time(void *priv, int value)
5236 {
5237         return i802_set_bss(priv, -1, -1, value);
5238 }
5239
5240
5241 static int i802_set_sta_vlan(void *priv, const u8 *addr,
5242                              const char *ifname, int vlan_id)
5243 {
5244         struct i802_bss *bss = priv;
5245         struct wpa_driver_nl80211_data *drv = bss->drv;
5246         struct nl_msg *msg;
5247         int ret = -ENOBUFS;
5248
5249         msg = nlmsg_alloc();
5250         if (!msg)
5251                 return -ENOMEM;
5252
5253         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5254                     0, NL80211_CMD_SET_STATION, 0);
5255
5256         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
5257                     if_nametoindex(bss->ifname));
5258         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5259         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
5260                     if_nametoindex(ifname));
5261
5262         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5263         if (ret < 0) {
5264                 wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
5265                            MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
5266                            MAC2STR(addr), ifname, vlan_id, ret,
5267                            strerror(-ret));
5268         }
5269  nla_put_failure:
5270         return ret;
5271 }
5272
5273
5274 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val,
5275                             const char *bridge_ifname)
5276 {
5277         struct i802_bss *bss = priv;
5278         struct wpa_driver_nl80211_data *drv = bss->drv;
5279         char name[IFNAMSIZ + 1];
5280
5281         os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
5282         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
5283                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
5284         if (val) {
5285                 if (!if_nametoindex(name)) {
5286                         if (nl80211_create_iface(drv, name,
5287                                                  NL80211_IFTYPE_AP_VLAN,
5288                                                  NULL, 1) < 0)
5289                                 return -1;
5290                         if (bridge_ifname &&
5291                             linux_br_add_if(drv->ioctl_sock, bridge_ifname,
5292                                             name) < 0)
5293                                 return -1;
5294                 }
5295                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
5296                 return i802_set_sta_vlan(priv, addr, name, 0);
5297         } else {
5298                 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
5299                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
5300                                                     name);
5301         }
5302 }
5303
5304
5305 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
5306 {
5307         struct wpa_driver_nl80211_data *drv = eloop_ctx;
5308         struct sockaddr_ll lladdr;
5309         unsigned char buf[3000];
5310         int len;
5311         socklen_t fromlen = sizeof(lladdr);
5312
5313         len = recvfrom(sock, buf, sizeof(buf), 0,
5314                        (struct sockaddr *)&lladdr, &fromlen);
5315         if (len < 0) {
5316                 perror("recv");
5317                 return;
5318         }
5319
5320         if (have_ifidx(drv, lladdr.sll_ifindex))
5321                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
5322 }
5323
5324
5325 static int i802_get_inact_sec(void *priv, const u8 *addr)
5326 {
5327         struct hostap_sta_driver_data data;
5328         int ret;
5329
5330         data.inactive_msec = (unsigned long) -1;
5331         ret = i802_read_sta_data(priv, &data, addr);
5332         if (ret || data.inactive_msec == (unsigned long) -1)
5333                 return -1;
5334         return data.inactive_msec / 1000;
5335 }
5336
5337
5338 static int i802_sta_clear_stats(void *priv, const u8 *addr)
5339 {
5340 #if 0
5341         /* TODO */
5342 #endif
5343         return 0;
5344 }
5345
5346
5347 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
5348                            int reason)
5349 {
5350         struct i802_bss *bss = priv;
5351         struct ieee80211_mgmt mgmt;
5352
5353         memset(&mgmt, 0, sizeof(mgmt));
5354         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
5355                                           WLAN_FC_STYPE_DEAUTH);
5356         memcpy(mgmt.da, addr, ETH_ALEN);
5357         memcpy(mgmt.sa, own_addr, ETH_ALEN);
5358         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
5359         mgmt.u.deauth.reason_code = host_to_le16(reason);
5360         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
5361                                             IEEE80211_HDRLEN +
5362                                             sizeof(mgmt.u.deauth));
5363 }
5364
5365
5366 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
5367                              int reason)
5368 {
5369         struct i802_bss *bss = priv;
5370         struct ieee80211_mgmt mgmt;
5371
5372         memset(&mgmt, 0, sizeof(mgmt));
5373         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
5374                                           WLAN_FC_STYPE_DISASSOC);
5375         memcpy(mgmt.da, addr, ETH_ALEN);
5376         memcpy(mgmt.sa, own_addr, ETH_ALEN);
5377         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
5378         mgmt.u.disassoc.reason_code = host_to_le16(reason);
5379         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
5380                                             IEEE80211_HDRLEN +
5381                                             sizeof(mgmt.u.disassoc));
5382 }
5383
5384
5385 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
5386                              const char *brname, const char *ifname)
5387 {
5388         int ifindex;
5389         char in_br[IFNAMSIZ];
5390
5391         os_strlcpy(drv->brname, brname, IFNAMSIZ);
5392         ifindex = if_nametoindex(brname);
5393         if (ifindex == 0) {
5394                 /*
5395                  * Bridge was configured, but the bridge device does
5396                  * not exist. Try to add it now.
5397                  */
5398                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
5399                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
5400                                    "bridge interface %s: %s",
5401                                    brname, strerror(errno));
5402                         return -1;
5403                 }
5404                 drv->added_bridge = 1;
5405                 add_ifidx(drv, if_nametoindex(brname));
5406         }
5407
5408         if (linux_br_get(in_br, ifname) == 0) {
5409                 if (os_strcmp(in_br, brname) == 0)
5410                         return 0; /* already in the bridge */
5411
5412                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
5413                            "bridge %s", ifname, in_br);
5414                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
5415                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
5416                                    "remove interface %s from bridge "
5417                                    "%s: %s",
5418                                    ifname, brname, strerror(errno));
5419                         return -1;
5420                 }
5421         }
5422
5423         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
5424                    ifname, brname);
5425         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
5426                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
5427                            "into bridge %s: %s",
5428                            ifname, brname, strerror(errno));
5429                 return -1;
5430         }
5431         drv->added_if_into_bridge = 1;
5432
5433         return 0;
5434 }
5435
5436
5437 static void *i802_init(struct hostapd_data *hapd,
5438                        struct wpa_init_params *params)
5439 {
5440         struct wpa_driver_nl80211_data *drv;
5441         struct i802_bss *bss;
5442         size_t i;
5443         char brname[IFNAMSIZ];
5444         int ifindex, br_ifindex;
5445         int br_added = 0;
5446
5447         bss = wpa_driver_nl80211_init(hapd, params->ifname, NULL);
5448         if (bss == NULL)
5449                 return NULL;
5450
5451         drv = bss->drv;
5452         if (linux_br_get(brname, params->ifname) == 0) {
5453                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
5454                            params->ifname, brname);
5455                 br_ifindex = if_nametoindex(brname);
5456         } else {
5457                 brname[0] = '\0';
5458                 br_ifindex = 0;
5459         }
5460
5461         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
5462         drv->if_indices = drv->default_if_indices;
5463         for (i = 0; i < params->num_bridge; i++) {
5464                 if (params->bridge[i]) {
5465                         ifindex = if_nametoindex(params->bridge[i]);
5466                         if (ifindex)
5467                                 add_ifidx(drv, ifindex);
5468                         if (ifindex == br_ifindex)
5469                                 br_added = 1;
5470                 }
5471         }
5472         if (!br_added && br_ifindex &&
5473             (params->num_bridge == 0 || !params->bridge[0]))
5474                 add_ifidx(drv, br_ifindex);
5475
5476         /* start listening for EAPOL on the default AP interface */
5477         add_ifidx(drv, drv->ifindex);
5478
5479         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
5480                 goto failed;
5481
5482         if (params->bssid) {
5483                 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
5484                                        params->bssid))
5485                         goto failed;
5486         }
5487
5488         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
5489                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
5490                            "into AP mode", bss->ifname);
5491                 goto failed;
5492         }
5493
5494         if (params->num_bridge && params->bridge[0] &&
5495             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
5496                 goto failed;
5497
5498         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
5499                 goto failed;
5500
5501         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
5502         if (drv->eapol_sock < 0) {
5503                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
5504                 goto failed;
5505         }
5506
5507         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
5508         {
5509                 printf("Could not register read socket for eapol\n");
5510                 goto failed;
5511         }
5512
5513         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
5514                 goto failed;
5515
5516         return bss;
5517
5518 failed:
5519         nl80211_remove_monitor_interface(drv);
5520         rfkill_deinit(drv->rfkill);
5521         netlink_deinit(drv->netlink);
5522         if (drv->ioctl_sock >= 0)
5523                 close(drv->ioctl_sock);
5524
5525         genl_family_put(drv->nl80211);
5526         nl_cache_free(drv->nl_cache);
5527         nl80211_handle_destroy(drv->nl_handle);
5528         nl_cb_put(drv->nl_cb);
5529         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
5530
5531         os_free(drv);
5532         return NULL;
5533 }
5534
5535
5536 static void i802_deinit(void *priv)
5537 {
5538         wpa_driver_nl80211_deinit(priv);
5539 }
5540
5541 #endif /* HOSTAPD */
5542
5543
5544 static enum nl80211_iftype wpa_driver_nl80211_if_type(
5545         enum wpa_driver_if_type type)
5546 {
5547         switch (type) {
5548         case WPA_IF_STATION:
5549         case WPA_IF_P2P_CLIENT:
5550         case WPA_IF_P2P_GROUP:
5551                 return NL80211_IFTYPE_STATION;
5552         case WPA_IF_AP_VLAN:
5553                 return NL80211_IFTYPE_AP_VLAN;
5554         case WPA_IF_AP_BSS:
5555         case WPA_IF_P2P_GO:
5556                 return NL80211_IFTYPE_AP;
5557         }
5558         return -1;
5559 }
5560
5561
5562 #ifdef CONFIG_P2P
5563
5564 static int nl80211_addr_in_use(struct nl80211_global *global, const u8 *addr)
5565 {
5566         struct wpa_driver_nl80211_data *drv;
5567         dl_list_for_each(drv, &global->interfaces,
5568                          struct wpa_driver_nl80211_data, list) {
5569                 if (os_memcmp(addr, drv->addr, ETH_ALEN) == 0)
5570                         return 1;
5571         }
5572         return 0;
5573 }
5574
5575
5576 static int nl80211_p2p_interface_addr(struct wpa_driver_nl80211_data *drv,
5577                                       u8 *new_addr)
5578 {
5579         unsigned int idx;
5580
5581         if (!drv->global)
5582                 return -1;
5583
5584         os_memcpy(new_addr, drv->addr, ETH_ALEN);
5585         for (idx = 0; idx < 64; idx++) {
5586                 new_addr[0] = drv->addr[0] | 0x02;
5587                 new_addr[0] ^= idx << 2;
5588                 if (!nl80211_addr_in_use(drv->global, new_addr))
5589                         break;
5590         }
5591         if (idx == 64)
5592                 return -1;
5593
5594         wpa_printf(MSG_DEBUG, "nl80211: Assigned new P2P Interface Address "
5595                    MACSTR, MAC2STR(new_addr));
5596
5597         return 0;
5598 }
5599
5600 #endif /* CONFIG_P2P */
5601
5602
5603 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
5604                                      const char *ifname, const u8 *addr,
5605                                      void *bss_ctx, void **drv_priv,
5606                                      char *force_ifname, u8 *if_addr)
5607 {
5608         struct i802_bss *bss = priv;
5609         struct wpa_driver_nl80211_data *drv = bss->drv;
5610         int ifidx;
5611 #ifdef HOSTAPD
5612         struct i802_bss *new_bss = NULL;
5613
5614         if (type == WPA_IF_AP_BSS) {
5615                 new_bss = os_zalloc(sizeof(*new_bss));
5616                 if (new_bss == NULL)
5617                         return -1;
5618         }
5619 #endif /* HOSTAPD */
5620
5621         if (addr)
5622                 os_memcpy(if_addr, addr, ETH_ALEN);
5623         ifidx = nl80211_create_iface(drv, ifname,
5624                                      wpa_driver_nl80211_if_type(type), addr,
5625                                      0);
5626         if (ifidx < 0) {
5627 #ifdef HOSTAPD
5628                 os_free(new_bss);
5629 #endif /* HOSTAPD */
5630                 return -1;
5631         }
5632
5633         if (!addr &&
5634             linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0) {
5635                 nl80211_remove_iface(drv, ifidx);
5636                 return -1;
5637         }
5638
5639 #ifdef CONFIG_P2P
5640         if (!addr &&
5641             (type == WPA_IF_P2P_CLIENT || type == WPA_IF_P2P_GROUP ||
5642              type == WPA_IF_P2P_GO)) {
5643                 /* Enforce unique P2P Interface Address */
5644                 u8 new_addr[ETH_ALEN], own_addr[ETH_ALEN];
5645
5646                 if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr)
5647                     < 0 ||
5648                     linux_get_ifhwaddr(drv->ioctl_sock, ifname, new_addr) < 0)
5649                 {
5650                         nl80211_remove_iface(drv, ifidx);
5651                         return -1;
5652                 }
5653                 if (os_memcmp(own_addr, new_addr, ETH_ALEN) == 0) {
5654                         wpa_printf(MSG_DEBUG, "nl80211: Allocate new address "
5655                                    "for P2P group interface");
5656                         if (nl80211_p2p_interface_addr(drv, new_addr) < 0) {
5657                                 nl80211_remove_iface(drv, ifidx);
5658                                 return -1;
5659                         }
5660                         if (linux_set_ifhwaddr(drv->ioctl_sock, ifname,
5661                                                new_addr) < 0) {
5662                                 nl80211_remove_iface(drv, ifidx);
5663                                 return -1;
5664                         }
5665                         os_memcpy(if_addr, new_addr, ETH_ALEN);
5666                 }
5667         }
5668 #endif /* CONFIG_P2P */
5669
5670 #ifdef HOSTAPD
5671         if (type == WPA_IF_AP_BSS) {
5672                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
5673                         nl80211_remove_iface(drv, ifidx);
5674                         os_free(new_bss);
5675                         return -1;
5676                 }
5677                 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
5678                 new_bss->ifindex = ifidx;
5679                 new_bss->drv = drv;
5680                 new_bss->next = drv->first_bss.next;
5681                 drv->first_bss.next = new_bss;
5682                 if (drv_priv)
5683                         *drv_priv = new_bss;
5684         }
5685 #endif /* HOSTAPD */
5686
5687         return 0;
5688 }
5689
5690
5691 static int wpa_driver_nl80211_if_remove(void *priv,
5692                                         enum wpa_driver_if_type type,
5693                                         const char *ifname)
5694 {
5695         struct i802_bss *bss = priv;
5696         struct wpa_driver_nl80211_data *drv = bss->drv;
5697         int ifindex = if_nametoindex(ifname);
5698
5699         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
5700                    __func__, type, ifname, ifindex);
5701         if (ifindex <= 0)
5702                 return -1;
5703         nl80211_remove_iface(drv, ifindex);
5704
5705 #ifdef HOSTAPD
5706         if (type != WPA_IF_AP_BSS)
5707                 return 0;
5708
5709         if (bss != &drv->first_bss) {
5710                 struct i802_bss *tbss = &drv->first_bss;
5711
5712                 while (tbss) {
5713                         if (tbss->next != bss)
5714                                 continue;
5715
5716                         tbss->next = bss->next;
5717                         os_free(bss);
5718                         break;
5719                 }
5720         }
5721 #endif /* HOSTAPD */
5722
5723         return 0;
5724 }
5725
5726
5727 static int cookie_handler(struct nl_msg *msg, void *arg)
5728 {
5729         struct nlattr *tb[NL80211_ATTR_MAX + 1];
5730         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5731         u64 *cookie = arg;
5732         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
5733                   genlmsg_attrlen(gnlh, 0), NULL);
5734         if (tb[NL80211_ATTR_COOKIE])
5735                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
5736         return NL_SKIP;
5737 }
5738
5739
5740 static int nl80211_send_frame_cmd(struct wpa_driver_nl80211_data *drv,
5741                                   unsigned int freq, const u8 *buf,
5742                                   size_t buf_len, u64 *cookie_out)
5743 {
5744         struct nl_msg *msg;
5745         u64 cookie;
5746         int ret = -1;
5747
5748         msg = nlmsg_alloc();
5749         if (!msg)
5750                 return -1;
5751
5752         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5753                     NL80211_CMD_FRAME, 0);
5754
5755         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5756         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5757         NLA_PUT(msg, NL80211_ATTR_FRAME, buf_len, buf);
5758
5759         cookie = 0;
5760         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5761         msg = NULL;
5762         if (ret) {
5763                 wpa_printf(MSG_DEBUG, "nl80211: Frame command failed: ret=%d "
5764                            "(%s)", ret, strerror(-ret));
5765                 goto nla_put_failure;
5766         }
5767         wpa_printf(MSG_DEBUG, "nl80211: Frame TX command accepted; "
5768                    "cookie 0x%llx", (long long unsigned int) cookie);
5769
5770         if (cookie_out)
5771                 *cookie_out = cookie;
5772
5773 nla_put_failure:
5774         nlmsg_free(msg);
5775         return ret;
5776 }
5777
5778
5779 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
5780                                           const u8 *dst, const u8 *src,
5781                                           const u8 *bssid,
5782                                           const u8 *data, size_t data_len)
5783 {
5784         struct i802_bss *bss = priv;
5785         struct wpa_driver_nl80211_data *drv = bss->drv;
5786         int ret = -1;
5787         u8 *buf;
5788         struct ieee80211_hdr *hdr;
5789
5790         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
5791                    drv->ifindex);
5792
5793         buf = os_zalloc(24 + data_len);
5794         if (buf == NULL)
5795                 return ret;
5796         os_memcpy(buf + 24, data, data_len);
5797         hdr = (struct ieee80211_hdr *) buf;
5798         hdr->frame_control =
5799                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
5800         os_memcpy(hdr->addr1, dst, ETH_ALEN);
5801         os_memcpy(hdr->addr2, src, ETH_ALEN);
5802         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
5803
5804         if (drv->nlmode == NL80211_IFTYPE_AP)
5805                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
5806         else
5807                 ret = nl80211_send_frame_cmd(drv, freq, buf, 24 + data_len,
5808                                              &drv->send_action_cookie);
5809
5810         os_free(buf);
5811         return ret;
5812 }
5813
5814
5815 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
5816                                                 unsigned int duration)
5817 {
5818         struct i802_bss *bss = priv;
5819         struct wpa_driver_nl80211_data *drv = bss->drv;
5820         struct nl_msg *msg;
5821         int ret;
5822         u64 cookie;
5823
5824         msg = nlmsg_alloc();
5825         if (!msg)
5826                 return -1;
5827
5828         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5829                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
5830
5831         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5832         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5833         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5834
5835         cookie = 0;
5836         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5837         if (ret == 0) {
5838                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
5839                            "0x%llx for freq=%u MHz duration=%u",
5840                            (long long unsigned int) cookie, freq, duration);
5841                 drv->remain_on_chan_cookie = cookie;
5842                 return 0;
5843         }
5844         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
5845                    "(freq=%d duration=%u): %d (%s)",
5846                    freq, duration, ret, strerror(-ret));
5847 nla_put_failure:
5848         return -1;
5849 }
5850
5851
5852 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
5853 {
5854         struct i802_bss *bss = priv;
5855         struct wpa_driver_nl80211_data *drv = bss->drv;
5856         struct nl_msg *msg;
5857         int ret;
5858
5859         if (!drv->pending_remain_on_chan) {
5860                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
5861                            "to cancel");
5862                 return -1;
5863         }
5864
5865         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
5866                    "0x%llx",
5867                    (long long unsigned int) drv->remain_on_chan_cookie);
5868
5869         msg = nlmsg_alloc();
5870         if (!msg)
5871                 return -1;
5872
5873         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5874                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
5875
5876         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5877         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
5878
5879         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5880         if (ret == 0)
5881                 return 0;
5882         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
5883                    "%d (%s)", ret, strerror(-ret));
5884 nla_put_failure:
5885         return -1;
5886 }
5887
5888
5889 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
5890 {
5891         struct i802_bss *bss = priv;
5892         struct wpa_driver_nl80211_data *drv = bss->drv;
5893
5894         if (drv->nlmode != NL80211_IFTYPE_STATION) {
5895                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
5896                            "allowed in station mode (iftype=%d)",
5897                            drv->nlmode);
5898                 return -1;
5899         }
5900
5901         if (!report) {
5902                 if (drv->nl_handle_preq) {
5903                         eloop_unregister_read_sock(
5904                                 nl_socket_get_fd(drv->nl_handle_preq));
5905                         nl_cache_free(drv->nl_cache_preq);
5906                         nl80211_handle_destroy(drv->nl_handle_preq);
5907                         drv->nl_handle_preq = NULL;
5908                 }
5909                 return 0;
5910         }
5911
5912         if (drv->nl_handle_preq) {
5913                 wpa_printf(MSG_DEBUG, "nl80211: Probe Request reporting "
5914                            "already on!");
5915                 return 0;
5916         }
5917
5918         drv->nl_handle_preq = nl80211_handle_alloc(drv->nl_cb);
5919         if (drv->nl_handle_preq == NULL) {
5920                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate "
5921                            "netlink callbacks (preq)");
5922                 goto out_err1;
5923         }
5924
5925         if (genl_connect(drv->nl_handle_preq)) {
5926                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to "
5927                            "generic netlink (preq)");
5928                 goto out_err2;
5929                 return -1;
5930         }
5931
5932 #ifdef CONFIG_LIBNL20
5933         if (genl_ctrl_alloc_cache(drv->nl_handle_preq,
5934                                   &drv->nl_cache_preq) < 0) {
5935                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
5936                            "netlink cache (preq)");
5937                 goto out_err2;
5938         }
5939 #else /* CONFIG_LIBNL20 */
5940         drv->nl_cache_preq = genl_ctrl_alloc_cache(drv->nl_handle_preq);
5941         if (drv->nl_cache_preq == NULL) {
5942                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
5943                            "netlink cache (preq)");
5944                 goto out_err2;
5945         }
5946 #endif /* CONFIG_LIBNL20 */
5947
5948         if (nl80211_register_frame(drv, drv->nl_handle_preq,
5949                                    (WLAN_FC_TYPE_MGMT << 2) |
5950                                    (WLAN_FC_STYPE_PROBE_REQ << 4),
5951                                    NULL, 0) < 0) {
5952                 goto out_err3;
5953         }
5954
5955         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_preq),
5956                                  wpa_driver_nl80211_event_receive, drv,
5957                                  drv->nl_handle_preq);
5958
5959         return 0;
5960
5961  out_err3:
5962         nl_cache_free(drv->nl_cache_preq);
5963  out_err2:
5964         nl80211_handle_destroy(drv->nl_handle_preq);
5965         drv->nl_handle_preq = NULL;
5966  out_err1:
5967         return -1;
5968 }
5969
5970
5971 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5972                                      int ifindex, int disabled)
5973 {
5974         struct nl_msg *msg;
5975         struct nlattr *bands, *band;
5976         int ret;
5977
5978         msg = nlmsg_alloc();
5979         if (!msg)
5980                 return -1;
5981
5982         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5983                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5984         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5985
5986         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5987         if (!bands)
5988                 goto nla_put_failure;
5989
5990         /*
5991          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5992          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5993          * rates. All 5 GHz rates are left enabled.
5994          */
5995         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5996         if (!band)
5997                 goto nla_put_failure;
5998         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5999                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
6000         nla_nest_end(msg, band);
6001
6002         nla_nest_end(msg, bands);
6003
6004         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
6005         msg = NULL;
6006         if (ret) {
6007                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
6008                            "(%s)", ret, strerror(-ret));
6009         }
6010
6011         return ret;
6012
6013 nla_put_failure:
6014         nlmsg_free(msg);
6015         return -1;
6016 }
6017
6018
6019 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
6020 {
6021         struct i802_bss *bss = priv;
6022         struct wpa_driver_nl80211_data *drv = bss->drv;
6023         drv->disable_11b_rates = disabled;
6024         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
6025 }
6026
6027
6028 static int wpa_driver_nl80211_deinit_ap(void *priv)
6029 {
6030         struct i802_bss *bss = priv;
6031         struct wpa_driver_nl80211_data *drv = bss->drv;
6032         if (drv->nlmode != NL80211_IFTYPE_AP)
6033                 return -1;
6034         wpa_driver_nl80211_del_beacon(drv);
6035         return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
6036 }
6037
6038
6039 static void wpa_driver_nl80211_resume(void *priv)
6040 {
6041         struct i802_bss *bss = priv;
6042         struct wpa_driver_nl80211_data *drv = bss->drv;
6043         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
6044                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
6045                            "resume event");
6046         }
6047 }
6048
6049
6050 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
6051                                   const u8 *ies, size_t ies_len)
6052 {
6053         struct i802_bss *bss = priv;
6054         struct wpa_driver_nl80211_data *drv = bss->drv;
6055         int ret;
6056         u8 *data, *pos;
6057         size_t data_len;
6058         u8 own_addr[ETH_ALEN];
6059
6060         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
6061                 return -1;
6062
6063         if (action != 1) {
6064                 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
6065                            "action %d", action);
6066                 return -1;
6067         }
6068
6069         /*
6070          * Action frame payload:
6071          * Category[1] = 6 (Fast BSS Transition)
6072          * Action[1] = 1 (Fast BSS Transition Request)
6073          * STA Address
6074          * Target AP Address
6075          * FT IEs
6076          */
6077
6078         data_len = 2 + 2 * ETH_ALEN + ies_len;
6079         data = os_malloc(data_len);
6080         if (data == NULL)
6081                 return -1;
6082         pos = data;
6083         *pos++ = 0x06; /* FT Action category */
6084         *pos++ = action;
6085         os_memcpy(pos, own_addr, ETH_ALEN);
6086         pos += ETH_ALEN;
6087         os_memcpy(pos, target_ap, ETH_ALEN);
6088         pos += ETH_ALEN;
6089         os_memcpy(pos, ies, ies_len);
6090
6091         ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
6092                                              own_addr, drv->bssid,
6093                                              data, data_len);
6094         os_free(data);
6095
6096         return ret;
6097 }
6098
6099
6100 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
6101 {
6102         struct i802_bss *bss = priv;
6103         struct wpa_driver_nl80211_data *drv = bss->drv;
6104         struct nl_msg *msg, *cqm = NULL;
6105
6106         wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
6107                    "hysteresis=%d", threshold, hysteresis);
6108
6109         msg = nlmsg_alloc();
6110         if (!msg)
6111                 return -1;
6112
6113         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
6114                     0, NL80211_CMD_SET_CQM, 0);
6115
6116         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
6117
6118         cqm = nlmsg_alloc();
6119         if (cqm == NULL)
6120                 return -1;
6121
6122         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
6123         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
6124         nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
6125
6126         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
6127                 return 0;
6128         msg = NULL;
6129
6130 nla_put_failure:
6131         if (cqm)
6132                 nlmsg_free(cqm);
6133         nlmsg_free(msg);
6134         return -1;
6135 }
6136
6137
6138 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
6139                               int encrypt)
6140 {
6141         struct i802_bss *bss = priv;
6142         struct wpa_driver_nl80211_data *drv = bss->drv;
6143         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
6144 }
6145
6146
6147 static int nl80211_set_intra_bss(void *priv, int enabled)
6148 {
6149         struct i802_bss *bss = priv;
6150         struct wpa_driver_nl80211_data *drv = bss->drv;
6151         struct nl_msg *msg;
6152
6153         msg = nlmsg_alloc();
6154         if (!msg)
6155                 return -ENOMEM;
6156
6157         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
6158                     NL80211_CMD_SET_BSS, 0);
6159
6160         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
6161         NLA_PUT_U8(msg, NL80211_ATTR_AP_ISOLATE, !enabled);
6162
6163         return send_and_recv_msgs(drv, msg, NULL, NULL);
6164  nla_put_failure:
6165         return -ENOBUFS;
6166 }
6167
6168
6169 static int nl80211_set_param(void *priv, const char *param)
6170 {
6171         wpa_printf(MSG_DEBUG, "nl80211: driver param='%s'", param);
6172         if (param == NULL)
6173                 return 0;
6174
6175 #ifdef CONFIG_P2P
6176         if (os_strstr(param, "use_p2p_group_interface=1")) {
6177                 struct i802_bss *bss = priv;
6178                 struct wpa_driver_nl80211_data *drv = bss->drv;
6179
6180                 wpa_printf(MSG_DEBUG, "nl80211: Use separate P2P group "
6181                            "interface");
6182                 drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CONCURRENT;
6183                 drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_MGMT_AND_NON_P2P;
6184         }
6185 #endif /* CONFIG_P2P */
6186
6187         return 0;
6188 }
6189
6190
6191 static void * nl80211_global_init(void)
6192 {
6193         struct nl80211_global *global;
6194         global = os_zalloc(sizeof(*global));
6195         if (global == NULL)
6196                 return NULL;
6197         dl_list_init(&global->interfaces);
6198         return global;
6199 }
6200
6201
6202 static void nl80211_global_deinit(void *priv)
6203 {
6204         struct nl80211_global *global = priv;
6205         if (global == NULL)
6206                 return;
6207         if (!dl_list_empty(&global->interfaces)) {
6208                 wpa_printf(MSG_ERROR, "nl80211: %u interface(s) remain at "
6209                            "nl80211_global_deinit",
6210                            dl_list_len(&global->interfaces));
6211         }
6212         os_free(global);
6213 }
6214
6215
6216 static const char * nl80211_get_radio_name(void *priv)
6217 {
6218         struct i802_bss *bss = priv;
6219         struct wpa_driver_nl80211_data *drv = bss->drv;
6220         return drv->phyname;
6221 }
6222
6223
6224 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
6225         .name = "nl80211",
6226         .desc = "Linux nl80211/cfg80211",
6227         .get_bssid = wpa_driver_nl80211_get_bssid,
6228         .get_ssid = wpa_driver_nl80211_get_ssid,
6229         .set_key = wpa_driver_nl80211_set_key,
6230         .scan2 = wpa_driver_nl80211_scan,
6231         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
6232         .deauthenticate = wpa_driver_nl80211_deauthenticate,
6233         .disassociate = wpa_driver_nl80211_disassociate,
6234         .authenticate = wpa_driver_nl80211_authenticate,
6235         .associate = wpa_driver_nl80211_associate,
6236         .global_init = nl80211_global_init,
6237         .global_deinit = nl80211_global_deinit,
6238         .init2 = wpa_driver_nl80211_init,
6239         .deinit = wpa_driver_nl80211_deinit,
6240         .get_capa = wpa_driver_nl80211_get_capa,
6241         .set_operstate = wpa_driver_nl80211_set_operstate,
6242         .set_supp_port = wpa_driver_nl80211_set_supp_port,
6243         .set_country = wpa_driver_nl80211_set_country,
6244         .set_beacon = wpa_driver_nl80211_set_beacon,
6245         .if_add = wpa_driver_nl80211_if_add,
6246         .if_remove = wpa_driver_nl80211_if_remove,
6247         .send_mlme = wpa_driver_nl80211_send_mlme,
6248         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
6249         .sta_add = wpa_driver_nl80211_sta_add,
6250         .sta_remove = wpa_driver_nl80211_sta_remove,
6251         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
6252         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
6253 #ifdef HOSTAPD
6254         .hapd_init = i802_init,
6255         .hapd_deinit = i802_deinit,
6256         .get_seqnum = i802_get_seqnum,
6257         .flush = i802_flush,
6258         .read_sta_data = i802_read_sta_data,
6259         .sta_deauth = i802_sta_deauth,
6260         .sta_disassoc = i802_sta_disassoc,
6261         .get_inact_sec = i802_get_inact_sec,
6262         .sta_clear_stats = i802_sta_clear_stats,
6263         .set_rts = i802_set_rts,
6264         .set_frag = i802_set_frag,
6265         .set_rate_sets = i802_set_rate_sets,
6266         .set_cts_protect = i802_set_cts_protect,
6267         .set_preamble = i802_set_preamble,
6268         .set_short_slot_time = i802_set_short_slot_time,
6269         .set_tx_queue_params = i802_set_tx_queue_params,
6270         .set_sta_vlan = i802_set_sta_vlan,
6271         .set_wds_sta = i802_set_wds_sta,
6272 #endif /* HOSTAPD */
6273         .set_freq = i802_set_freq,
6274         .send_action = wpa_driver_nl80211_send_action,
6275         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
6276         .cancel_remain_on_channel =
6277         wpa_driver_nl80211_cancel_remain_on_channel,
6278         .probe_req_report = wpa_driver_nl80211_probe_req_report,
6279         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
6280         .deinit_ap = wpa_driver_nl80211_deinit_ap,
6281         .resume = wpa_driver_nl80211_resume,
6282         .send_ft_action = nl80211_send_ft_action,
6283         .signal_monitor = nl80211_signal_monitor,
6284         .send_frame = nl80211_send_frame,
6285         .set_intra_bss = nl80211_set_intra_bss,
6286         .set_param = nl80211_set_param,
6287         .get_radio_name = nl80211_get_radio_name,
6288 };