src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009-2010, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/genl/ctrl.h>
  25 #include <linux/rtnetlink.h>
  26 #include <netpacket/packet.h>
  27 #include <linux/filter.h>
  28 #include "nl80211_copy.h"
  29
  30 #include "common.h"
  31 #include "eloop.h"
  32 #include "common/ieee802_11_defs.h"
  33 #include "netlink.h"
  34 #include "linux_ioctl.h"
  35 #include "radiotap.h"
  36 #include "radiotap_iter.h"
  37 #include "rfkill.h"
  38 #include "driver.h"
  39
  40 #ifdef CONFIG_LIBNL20
  41 /* libnl 2.0 compatibility code */
  42 #define nl_handle nl_sock
  43 #define nl80211_handle_alloc nl_socket_alloc_cb
  44 #define nl80211_handle_destroy nl_socket_free
  45 #else
  46 /*
  47  * libnl 1.1 has a bug, it tries to allocate socket numbers densely
  48  * but when you free a socket again it will mess up its bitmap and
  49  * and use the wrong number the next time it needs a socket ID.
  50  * Therefore, we wrap the handle alloc/destroy and add our own pid
  51  * accounting.
  52  */
  53 static uint32_t port_bitmap[32] = { 0 };
  54
  55 static struct nl_handle *nl80211_handle_alloc(void *cb)
  56 {
  57         struct nl_handle *handle;
  58         uint32_t pid = getpid() & 0x3FFFFF;
  59         int i;
  60
  61         handle = nl_handle_alloc_cb(cb);
  62
  63         for (i = 0; i < 1024; i++) {
  64                 if (port_bitmap[i / 32] & (1 << (i % 32)))
  65                         continue;
  66                 port_bitmap[i / 32] |= 1 << (i % 32);
  67                 pid += i << 22;
  68                 break;
  69         }
  70
  71         nl_socket_set_local_port(handle, pid);
  72
  73         return handle;
  74 }
  75
  76 static void nl80211_handle_destroy(struct nl_handle *handle)
  77 {
  78         uint32_t port = nl_socket_get_local_port(handle);
  79
  80         port >>= 22;
  81         port_bitmap[port / 32] &= ~(1 << (port % 32));
  82
  83         nl_handle_destroy(handle);
  84 }
  85 #endif /* CONFIG_LIBNL20 */
  86
  87
  88 #ifndef IFF_LOWER_UP
  89 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  90 #endif
  91 #ifndef IFF_DORMANT
  92 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  93 #endif
  94
  95 #ifndef IF_OPER_DORMANT
  96 #define IF_OPER_DORMANT 5
  97 #endif
  98 #ifndef IF_OPER_UP
  99 #define IF_OPER_UP 6
 100 #endif
 101
 102 struct i802_bss {
 103         struct wpa_driver_nl80211_data *drv;
 104         struct i802_bss *next;
 105         int ifindex;
 106         char ifname[IFNAMSIZ + 1];
 107         unsigned int beacon_set:1;
 108 };
 109
 110 struct wpa_driver_nl80211_data {
 111         void *ctx;
 112         struct netlink_data *netlink;
 113         int ioctl_sock; /* socket for ioctl() use */
 114         char brname[IFNAMSIZ];
 115         int ifindex;
 116         int if_removed;
 117         int if_disabled;
 118         struct rfkill_data *rfkill;
 119         struct wpa_driver_capa capa;
 120         int has_capability;
 121
 122         int operstate;
 123
 124         int scan_complete_events;
 125
 126         struct nl_handle *nl_handle;
 127         struct nl_handle *nl_handle_event;
 128         struct nl_cache *nl_cache;
 129         struct nl_cache *nl_cache_event;
 130         struct nl_cb *nl_cb;
 131         struct genl_family *nl80211;
 132
 133         u8 auth_bssid[ETH_ALEN];
 134         u8 bssid[ETH_ALEN];
 135         int associated;
 136         u8 ssid[32];
 137         size_t ssid_len;
 138         int nlmode;
 139         int ap_scan_as_station;
 140         unsigned int assoc_freq;
 141
 142         int monitor_sock;
 143         int monitor_ifidx;
 144         int probe_req_report;
 145         int disable_11b_rates;
 146
 147         unsigned int pending_remain_on_chan:1;
 148         unsigned int added_bridge:1;
 149         unsigned int added_if_into_bridge:1;
 150
 151         u64 remain_on_chan_cookie;
 152         u64 send_action_cookie;
 153
 154         struct wpa_driver_scan_filter *filter_ssids;
 155         size_t num_filter_ssids;
 156
 157         struct i802_bss first_bss;
 158
 159 #ifdef HOSTAPD
 160         int eapol_sock; /* socket for EAPOL frames */
 161
 162         int default_if_indices[16];
 163         int *if_indices;
 164         int num_if_indices;
 165
 166         int last_freq;
 167         int last_freq_ht;
 168 #endif /* HOSTAPD */
 169 };
 170
 171
 172 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 173                                             void *timeout_ctx);
 174 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 175 static int
 176 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 177 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 178                                    const u8 *addr, int cmd, u16 reason_code,
 179                                    int local_state_change);
 180 static void nl80211_remove_monitor_interface(
 181         struct wpa_driver_nl80211_data *drv);
 182
 183 #ifdef HOSTAPD
 184 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 185 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 186 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 187 static int wpa_driver_nl80211_if_remove(void *priv,
 188                                         enum wpa_driver_if_type type,
 189                                         const char *ifname);
 190 #else /* HOSTAPD */
 191 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
 192 {
 193         return 0;
 194 }
 195 #endif /* HOSTAPD */
 196
 197 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 198 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
 199                                                         void *timeout_ctx);
 200 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
 201                                      int ifindex, int disabled);
 202
 203
 204 /* nl80211 code */
 205 static int ack_handler(struct nl_msg *msg, void *arg)
 206 {
 207         int *err = arg;
 208         *err = 0;
 209         return NL_STOP;
 210 }
 211
 212 static int finish_handler(struct nl_msg *msg, void *arg)
 213 {
 214         int *ret = arg;
 215         *ret = 0;
 216         return NL_SKIP;
 217 }
 218
 219 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 220                          void *arg)
 221 {
 222         int *ret = arg;
 223         *ret = err->error;
 224         return NL_SKIP;
 225 }
 226
 227
 228 static int no_seq_check(struct nl_msg *msg, void *arg)
 229 {
 230         return NL_OK;
 231 }
 232
 233
 234 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
 235                          struct nl_handle *nl_handle, struct nl_msg *msg,
 236                          int (*valid_handler)(struct nl_msg *, void *),
 237                          void *valid_data)
 238 {
 239         struct nl_cb *cb;
 240         int err = -ENOMEM;
 241
 242         cb = nl_cb_clone(drv->nl_cb);
 243         if (!cb)
 244                 goto out;
 245
 246         err = nl_send_auto_complete(nl_handle, msg);
 247         if (err < 0)
 248                 goto out;
 249
 250         err = 1;
 251
 252         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 253         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 254         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 255
 256         if (valid_handler)
 257                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 258                           valid_handler, valid_data);
 259
 260         while (err > 0)
 261                 nl_recvmsgs(nl_handle, cb);
 262  out:
 263         nl_cb_put(cb);
 264         nlmsg_free(msg);
 265         return err;
 266 }
 267
 268
 269 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 270                               struct nl_msg *msg,
 271                               int (*valid_handler)(struct nl_msg *, void *),
 272                               void *valid_data)
 273 {
 274         return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
 275                              valid_data);
 276 }
 277
 278
 279 struct family_data {
 280         const char *group;
 281         int id;
 282 };
 283
 284
 285 static int family_handler(struct nl_msg *msg, void *arg)
 286 {
 287         struct family_data *res = arg;
 288         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 289         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 290         struct nlattr *mcgrp;
 291         int i;
 292
 293         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 294                   genlmsg_attrlen(gnlh, 0), NULL);
 295         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 296                 return NL_SKIP;
 297
 298         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 299                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 300                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 301                           nla_len(mcgrp), NULL);
 302                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 303                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 304                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 305                                res->group,
 306                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 307                         continue;
 308                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 309                 break;
 310         };
 311
 312         return NL_SKIP;
 313 }
 314
 315
 316 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 317                                const char *family, const char *group)
 318 {
 319         struct nl_msg *msg;
 320         int ret = -1;
 321         struct family_data res = { group, -ENOENT };
 322
 323         msg = nlmsg_alloc();
 324         if (!msg)
 325                 return -ENOMEM;
 326         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 327                     0, 0, CTRL_CMD_GETFAMILY, 0);
 328         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 329
 330         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 331         msg = NULL;
 332         if (ret == 0)
 333                 ret = res.id;
 334
 335 nla_put_failure:
 336         nlmsg_free(msg);
 337         return ret;
 338 }
 339
 340
 341 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 342 {
 343         struct i802_bss *bss = priv;
 344         struct wpa_driver_nl80211_data *drv = bss->drv;
 345         if (!drv->associated)
 346                 return -1;
 347         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 348         return 0;
 349 }
 350
 351
 352 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 353 {
 354         struct i802_bss *bss = priv;
 355         struct wpa_driver_nl80211_data *drv = bss->drv;
 356         if (!drv->associated)
 357                 return -1;
 358         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 359         return drv->ssid_len;
 360 }
 361
 362
 363 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 364                                           char *buf, size_t len, int del)
 365 {
 366         union wpa_event_data event;
 367
 368         os_memset(&event, 0, sizeof(event));
 369         if (len > sizeof(event.interface_status.ifname))
 370                 len = sizeof(event.interface_status.ifname) - 1;
 371         os_memcpy(event.interface_status.ifname, buf, len);
 372         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 373                 EVENT_INTERFACE_ADDED;
 374
 375         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 376                    del ? "DEL" : "NEW",
 377                    event.interface_status.ifname,
 378                    del ? "removed" : "added");
 379
 380         if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
 381                 if (del)
 382                         drv->if_removed = 1;
 383                 else
 384                         drv->if_removed = 0;
 385         }
 386
 387         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 388 }
 389
 390
 391 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 392                                          u8 *buf, size_t len)
 393 {
 394         int attrlen, rta_len;
 395         struct rtattr *attr;
 396
 397         attrlen = len;
 398         attr = (struct rtattr *) buf;
 399
 400         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 401         while (RTA_OK(attr, attrlen)) {
 402                 if (attr->rta_type == IFLA_IFNAME) {
 403                         if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
 404                             == 0)
 405                                 return 1;
 406                         else
 407                                 break;
 408                 }
 409                 attr = RTA_NEXT(attr, attrlen);
 410         }
 411
 412         return 0;
 413 }
 414
 415
 416 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 417                                           int ifindex, u8 *buf, size_t len)
 418 {
 419         if (drv->ifindex == ifindex)
 420                 return 1;
 421
 422         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 423                 drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
 424                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 425                            "interface");
 426                 wpa_driver_nl80211_finish_drv_init(drv);
 427                 return 1;
 428         }
 429
 430         return 0;
 431 }
 432
 433
 434 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 435                                                  struct ifinfomsg *ifi,
 436                                                  u8 *buf, size_t len)
 437 {
 438         struct wpa_driver_nl80211_data *drv = ctx;
 439         int attrlen, rta_len;
 440         struct rtattr *attr;
 441         u32 brid = 0;
 442
 443         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len) &&
 444             !have_ifidx(drv, ifi->ifi_index)) {
 445                 wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
 446                            "ifindex %d", ifi->ifi_index);
 447                 return;
 448         }
 449
 450         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 451                    "(%s%s%s%s)",
 452                    drv->operstate, ifi->ifi_flags,
 453                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 454                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 455                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 456                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 457
 458         if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
 459                 wpa_printf(MSG_DEBUG, "nl80211: Interface down");
 460                 drv->if_disabled = 1;
 461                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
 462         }
 463
 464         if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
 465                 wpa_printf(MSG_DEBUG, "nl80211: Interface up");
 466                 drv->if_disabled = 0;
 467                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
 468         }
 469
 470         /*
 471          * Some drivers send the association event before the operup event--in
 472          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 473          * fails. This will hit us when wpa_supplicant does not need to do
 474          * IEEE 802.1X authentication
 475          */
 476         if (drv->operstate == 1 &&
 477             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 478             !(ifi->ifi_flags & IFF_RUNNING))
 479                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 480                                        -1, IF_OPER_UP);
 481
 482         attrlen = len;
 483         attr = (struct rtattr *) buf;
 484         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 485         while (RTA_OK(attr, attrlen)) {
 486                 if (attr->rta_type == IFLA_IFNAME) {
 487                         wpa_driver_nl80211_event_link(
 488                                 drv,
 489                                 ((char *) attr) + rta_len,
 490                                 attr->rta_len - rta_len, 0);
 491                 } else if (attr->rta_type == IFLA_MASTER)
 492                         brid = nla_get_u32((struct nlattr *) attr);
 493                 attr = RTA_NEXT(attr, attrlen);
 494         }
 495
 496 #ifdef HOSTAPD
 497         if (ifi->ifi_family == AF_BRIDGE && brid) {
 498                 /* device has been added to bridge */
 499                 char namebuf[IFNAMSIZ];
 500                 if_indextoname(brid, namebuf);
 501                 wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
 502                            brid, namebuf);
 503                 add_ifidx(drv, brid);
 504         }
 505 #endif /* HOSTAPD */
 506 }
 507
 508
 509 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 510                                                  struct ifinfomsg *ifi,
 511                                                  u8 *buf, size_t len)
 512 {
 513         struct wpa_driver_nl80211_data *drv = ctx;
 514         int attrlen, rta_len;
 515         struct rtattr *attr;
 516         u32 brid = 0;
 517
 518         attrlen = len;
 519         attr = (struct rtattr *) buf;
 520
 521         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 522         while (RTA_OK(attr, attrlen)) {
 523                 if (attr->rta_type == IFLA_IFNAME) {
 524                         wpa_driver_nl80211_event_link(
 525                                 drv,
 526                                 ((char *) attr) + rta_len,
 527                                 attr->rta_len - rta_len, 1);
 528                 } else if (attr->rta_type == IFLA_MASTER)
 529                         brid = nla_get_u32((struct nlattr *) attr);
 530                 attr = RTA_NEXT(attr, attrlen);
 531         }
 532
 533 #ifdef HOSTAPD
 534         if (ifi->ifi_family == AF_BRIDGE && brid) {
 535                 /* device has been removed from bridge */
 536                 char namebuf[IFNAMSIZ];
 537                 if_indextoname(brid, namebuf);
 538                 wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
 539                            "%s", brid, namebuf);
 540                 del_ifidx(drv, brid);
 541         }
 542 #endif /* HOSTAPD */
 543 }
 544
 545
 546 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 547                             const u8 *frame, size_t len)
 548 {
 549         const struct ieee80211_mgmt *mgmt;
 550         union wpa_event_data event;
 551
 552         mgmt = (const struct ieee80211_mgmt *) frame;
 553         if (len < 24 + sizeof(mgmt->u.auth)) {
 554                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 555                            "frame");
 556                 return;
 557         }
 558
 559         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 560         os_memset(&event, 0, sizeof(event));
 561         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 562         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 563         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 564         if (len > 24 + sizeof(mgmt->u.auth)) {
 565                 event.auth.ies = mgmt->u.auth.variable;
 566                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 567         }
 568
 569         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 570 }
 571
 572
 573 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 574                             const u8 *frame, size_t len)
 575 {
 576         const struct ieee80211_mgmt *mgmt;
 577         union wpa_event_data event;
 578         u16 status;
 579
 580         mgmt = (const struct ieee80211_mgmt *) frame;
 581         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 582                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 583                            "frame");
 584                 return;
 585         }
 586
 587         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 588         if (status != WLAN_STATUS_SUCCESS) {
 589                 os_memset(&event, 0, sizeof(event));
 590                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 591                         event.assoc_reject.resp_ies =
 592                                 (u8 *) mgmt->u.assoc_resp.variable;
 593                         event.assoc_reject.resp_ies_len =
 594                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 595                 }
 596                 event.assoc_reject.status_code = status;
 597
 598                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 599                 return;
 600         }
 601
 602         drv->associated = 1;
 603         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 604
 605         os_memset(&event, 0, sizeof(event));
 606         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 607                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 608                 event.assoc_info.resp_ies_len =
 609                         len - 24 - sizeof(mgmt->u.assoc_resp);
 610         }
 611
 612         event.assoc_info.freq = drv->assoc_freq;
 613
 614         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 615 }
 616
 617
 618 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 619                                enum nl80211_commands cmd, struct nlattr *status,
 620                                struct nlattr *addr, struct nlattr *req_ie,
 621                                struct nlattr *resp_ie)
 622 {
 623         union wpa_event_data event;
 624
 625         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 626                 /*
 627                  * Avoid reporting two association events that would confuse
 628                  * the core code.
 629                  */
 630                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 631                            "when using userspace SME", cmd);
 632                 return;
 633         }
 634
 635         os_memset(&event, 0, sizeof(event));
 636         if (cmd == NL80211_CMD_CONNECT &&
 637             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 638                 if (resp_ie) {
 639                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 640                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 641                 }
 642                 event.assoc_reject.status_code = nla_get_u16(status);
 643                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 644                 return;
 645         }
 646
 647         drv->associated = 1;
 648         if (addr)
 649                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 650
 651         if (req_ie) {
 652                 event.assoc_info.req_ies = nla_data(req_ie);
 653                 event.assoc_info.req_ies_len = nla_len(req_ie);
 654         }
 655         if (resp_ie) {
 656                 event.assoc_info.resp_ies = nla_data(resp_ie);
 657                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 658         }
 659
 660         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 661 }
 662
 663
 664 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 665                                enum nl80211_commands cmd, struct nlattr *addr)
 666 {
 667         union wpa_event_data event;
 668         enum wpa_event_type ev;
 669
 670         if (nla_len(addr) != ETH_ALEN)
 671                 return;
 672
 673         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 674                    cmd, MAC2STR((u8 *) nla_data(addr)));
 675
 676         if (cmd == NL80211_CMD_AUTHENTICATE)
 677                 ev = EVENT_AUTH_TIMED_OUT;
 678         else if (cmd == NL80211_CMD_ASSOCIATE)
 679                 ev = EVENT_ASSOC_TIMED_OUT;
 680         else
 681                 return;
 682
 683         os_memset(&event, 0, sizeof(event));
 684         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 685         wpa_supplicant_event(drv->ctx, ev, &event);
 686 }
 687
 688
 689 static void mlme_event_action(struct wpa_driver_nl80211_data *drv,
 690                               struct nlattr *freq, const u8 *frame, size_t len)
 691 {
 692         const struct ieee80211_mgmt *mgmt;
 693         union wpa_event_data event;
 694         u16 fc, stype;
 695
 696         mgmt = (const struct ieee80211_mgmt *) frame;
 697         if (len < 24) {
 698                 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
 699                 return;
 700         }
 701
 702         fc = le_to_host16(mgmt->frame_control);
 703         stype = WLAN_FC_GET_STYPE(fc);
 704
 705         os_memset(&event, 0, sizeof(event));
 706         event.rx_action.da = mgmt->da;
 707         event.rx_action.sa = mgmt->sa;
 708         event.rx_action.bssid = mgmt->bssid;
 709         event.rx_action.category = mgmt->u.action.category;
 710         event.rx_action.data = &mgmt->u.action.category + 1;
 711         event.rx_action.len = frame + len - event.rx_action.data;
 712         if (freq)
 713                 event.rx_action.freq = nla_get_u32(freq);
 714         wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
 715 }
 716
 717
 718 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
 719                                         struct nlattr *cookie, const u8 *frame,
 720                                         size_t len, struct nlattr *ack)
 721 {
 722         union wpa_event_data event;
 723         const struct ieee80211_hdr *hdr;
 724         u16 fc;
 725         u64 cookie_val;
 726
 727         if (!cookie)
 728                 return;
 729
 730         cookie_val = nla_get_u64(cookie);
 731         wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s "
 732                    "(ack=%d)",
 733                    (long long unsigned int) cookie_val,
 734                    cookie_val == drv->send_action_cookie ?
 735                    " (match)" : " (unknown)", ack != NULL);
 736         if (cookie_val != drv->send_action_cookie)
 737                 return;
 738
 739         hdr = (const struct ieee80211_hdr *) frame;
 740         fc = le_to_host16(hdr->frame_control);
 741
 742         os_memset(&event, 0, sizeof(event));
 743         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
 744         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
 745         event.tx_status.dst = hdr->addr1;
 746         event.tx_status.data = frame;
 747         event.tx_status.data_len = len;
 748         event.tx_status.ack = ack != NULL;
 749         wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
 750 }
 751
 752
 753 static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
 754                                        enum wpa_event_type type,
 755                                        const u8 *frame, size_t len)
 756 {
 757         const struct ieee80211_mgmt *mgmt;
 758         union wpa_event_data event;
 759         const u8 *bssid = NULL;
 760         u16 reason_code = 0;
 761
 762         mgmt = (const struct ieee80211_mgmt *) frame;
 763         if (len >= 24) {
 764                 bssid = mgmt->bssid;
 765
 766                 if (drv->associated != 0 &&
 767                     os_memcmp(bssid, drv->bssid, ETH_ALEN) != 0 &&
 768                     os_memcmp(bssid, drv->auth_bssid, ETH_ALEN) != 0) {
 769                         /*
 770                          * We have presumably received this deauth as a
 771                          * response to a clear_state_mismatch() outgoing
 772                          * deauth.  Don't let it take us offline!
 773                          */
 774                         wpa_printf(MSG_DEBUG, "nl80211: Deauth received "
 775                                    "from Unknown BSSID " MACSTR " -- ignoring",
 776                                    MAC2STR(bssid));
 777                         return;
 778                 }
 779         }
 780
 781         drv->associated = 0;
 782         os_memset(&event, 0, sizeof(event));
 783
 784         /* Note: Same offset for Reason Code in both frame subtypes */
 785         if (len >= 24 + sizeof(mgmt->u.deauth))
 786                 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
 787
 788         if (type == EVENT_DISASSOC) {
 789                 event.disassoc_info.addr = bssid;
 790                 event.disassoc_info.reason_code = reason_code;
 791                 if (frame + len > mgmt->u.disassoc.variable) {
 792                         event.disassoc_info.ie = mgmt->u.disassoc.variable;
 793                         event.disassoc_info.ie_len = frame + len -
 794                                 mgmt->u.disassoc.variable;
 795                 }
 796         } else {
 797                 event.deauth_info.addr = bssid;
 798                 event.deauth_info.reason_code = reason_code;
 799                 if (frame + len > mgmt->u.deauth.variable) {
 800                         event.deauth_info.ie = mgmt->u.deauth.variable;
 801                         event.deauth_info.ie_len = frame + len -
 802                                 mgmt->u.deauth.variable;
 803                 }
 804         }
 805
 806         wpa_supplicant_event(drv->ctx, type, &event);
 807 }
 808
 809
 810 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 811                        enum nl80211_commands cmd, struct nlattr *frame,
 812                        struct nlattr *addr, struct nlattr *timed_out,
 813                        struct nlattr *freq, struct nlattr *ack,
 814                        struct nlattr *cookie)
 815 {
 816         if (timed_out && addr) {
 817                 mlme_timeout_event(drv, cmd, addr);
 818                 return;
 819         }
 820
 821         if (frame == NULL) {
 822                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 823                            "data", cmd);
 824                 return;
 825         }
 826
 827         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 828         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 829                     nla_data(frame), nla_len(frame));
 830
 831         switch (cmd) {
 832         case NL80211_CMD_AUTHENTICATE:
 833                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 834                 break;
 835         case NL80211_CMD_ASSOCIATE:
 836                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 837                 break;
 838         case NL80211_CMD_DEAUTHENTICATE:
 839                 mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
 840                                            nla_data(frame), nla_len(frame));
 841                 break;
 842         case NL80211_CMD_DISASSOCIATE:
 843                 mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
 844                                            nla_data(frame), nla_len(frame));
 845                 break;
 846         case NL80211_CMD_FRAME:
 847                 mlme_event_action(drv, freq, nla_data(frame), nla_len(frame));
 848                 break;
 849         case NL80211_CMD_FRAME_TX_STATUS:
 850                 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
 851                                             nla_len(frame), ack);
 852                 break;
 853         default:
 854                 break;
 855         }
 856 }
 857
 858
 859 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 860                                            struct nlattr *tb[])
 861 {
 862         union wpa_event_data data;
 863
 864         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 865         os_memset(&data, 0, sizeof(data));
 866         if (tb[NL80211_ATTR_MAC]) {
 867                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 868                             nla_data(tb[NL80211_ATTR_MAC]),
 869                             nla_len(tb[NL80211_ATTR_MAC]));
 870                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 871         }
 872         if (tb[NL80211_ATTR_KEY_SEQ]) {
 873                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 874                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 875                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 876         }
 877         if (tb[NL80211_ATTR_KEY_TYPE]) {
 878                 enum nl80211_key_type key_type =
 879                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 880                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 881                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 882                         data.michael_mic_failure.unicast = 1;
 883         } else
 884                 data.michael_mic_failure.unicast = 1;
 885
 886         if (tb[NL80211_ATTR_KEY_IDX]) {
 887                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 888                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 889         }
 890
 891         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 892 }
 893
 894
 895 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 896                                  struct nlattr *tb[])
 897 {
 898         if (tb[NL80211_ATTR_MAC] == NULL) {
 899                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 900                            "event");
 901                 return;
 902         }
 903         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 904         drv->associated = 1;
 905         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 906                    MAC2STR(drv->bssid));
 907
 908         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 909 }
 910
 911
 912 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
 913                                          int cancel_event, struct nlattr *tb[])
 914 {
 915         unsigned int freq, chan_type, duration;
 916         union wpa_event_data data;
 917         u64 cookie;
 918
 919         if (tb[NL80211_ATTR_WIPHY_FREQ])
 920                 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 921         else
 922                 freq = 0;
 923
 924         if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
 925                 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 926         else
 927                 chan_type = 0;
 928
 929         if (tb[NL80211_ATTR_DURATION])
 930                 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
 931         else
 932                 duration = 0;
 933
 934         if (tb[NL80211_ATTR_COOKIE])
 935                 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
 936         else
 937                 cookie = 0;
 938
 939         wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
 940                    "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
 941                    cancel_event, freq, chan_type, duration,
 942                    (long long unsigned int) cookie,
 943                    cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
 944
 945         if (cookie != drv->remain_on_chan_cookie)
 946                 return; /* not for us */
 947
 948         drv->pending_remain_on_chan = !cancel_event;
 949
 950         os_memset(&data, 0, sizeof(data));
 951         data.remain_on_channel.freq = freq;
 952         data.remain_on_channel.duration = duration;
 953         wpa_supplicant_event(drv->ctx, cancel_event ?
 954                              EVENT_CANCEL_REMAIN_ON_CHANNEL :
 955                              EVENT_REMAIN_ON_CHANNEL, &data);
 956 }
 957
 958
 959 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 960                             struct nlattr *tb[])
 961 {
 962         union wpa_event_data event;
 963         struct nlattr *nl;
 964         int rem;
 965         struct scan_info *info;
 966 #define MAX_REPORT_FREQS 50
 967         int freqs[MAX_REPORT_FREQS];
 968         int num_freqs = 0;
 969
 970         os_memset(&event, 0, sizeof(event));
 971         info = &event.scan_info;
 972         info->aborted = aborted;
 973
 974         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 975                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
 976                         struct wpa_driver_scan_ssid *s =
 977                                 &info->ssids[info->num_ssids];
 978                         s->ssid = nla_data(nl);
 979                         s->ssid_len = nla_len(nl);
 980                         info->num_ssids++;
 981                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
 982                                 break;
 983                 }
 984         }
 985         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 986                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
 987                 {
 988                         freqs[num_freqs] = nla_get_u32(nl);
 989                         num_freqs++;
 990                         if (num_freqs == MAX_REPORT_FREQS - 1)
 991                                 break;
 992                 }
 993                 info->freqs = freqs;
 994                 info->num_freqs = num_freqs;
 995         }
 996         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
 997 }
 998
 999
1000 static int get_link_signal(struct nl_msg *msg, void *arg)
1001 {
1002         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1003         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1004         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1005         static struct nla_policy policy[NL80211_STA_INFO_MAX + 1] = {
1006                 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1007         };
1008         int *sig = arg;
1009
1010         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1011                   genlmsg_attrlen(gnlh, 0), NULL);
1012         if (!tb[NL80211_ATTR_STA_INFO] ||
1013             nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1014                              tb[NL80211_ATTR_STA_INFO], policy))
1015                 return NL_SKIP;
1016         if (!sinfo[NL80211_STA_INFO_SIGNAL])
1017                 return NL_SKIP;
1018
1019         *sig = (s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1020         return NL_SKIP;
1021 }
1022
1023
1024 static int nl80211_get_link_signal(struct wpa_driver_nl80211_data *drv,
1025                                    int *sig)
1026 {
1027         struct nl_msg *msg;
1028
1029         *sig = -9999;
1030
1031         msg = nlmsg_alloc();
1032         if (!msg)
1033                 return -ENOMEM;
1034
1035         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1036                     0, NL80211_CMD_GET_STATION, 0);
1037
1038         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1039         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
1040
1041         return send_and_recv_msgs(drv, msg, get_link_signal, sig);
1042  nla_put_failure:
1043         return -ENOBUFS;
1044 }
1045
1046
1047 static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
1048                               struct nlattr *tb[])
1049 {
1050         static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
1051                 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
1052                 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
1053                 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
1054         };
1055         struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
1056         enum nl80211_cqm_rssi_threshold_event event;
1057         union wpa_event_data ed;
1058         int sig, res;
1059
1060         if (tb[NL80211_ATTR_CQM] == NULL ||
1061             nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
1062                              cqm_policy)) {
1063                 wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
1064                 return;
1065         }
1066
1067         if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
1068                 return;
1069         event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
1070
1071         os_memset(&ed, 0, sizeof(ed));
1072
1073         if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
1074                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1075                            "event: RSSI high");
1076                 ed.signal_change.above_threshold = 1;
1077         } else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
1078                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1079                            "event: RSSI low");
1080                 ed.signal_change.above_threshold = 0;
1081         } else
1082                 return;
1083
1084         res = nl80211_get_link_signal(drv, &sig);
1085         if (res == 0) {
1086                 ed.signal_change.current_signal = sig;
1087                 wpa_printf(MSG_DEBUG, "nl80211: Signal: %d dBm", sig);
1088         }
1089
1090         wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
1091 }
1092
1093
1094 static int process_event(struct nl_msg *msg, void *arg)
1095 {
1096         struct wpa_driver_nl80211_data *drv = arg;
1097         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1098         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1099         union wpa_event_data data;
1100
1101         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1102                   genlmsg_attrlen(gnlh, 0), NULL);
1103
1104         if (tb[NL80211_ATTR_IFINDEX]) {
1105                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1106                 if (ifindex != drv->ifindex && !have_ifidx(drv, ifindex)) {
1107                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
1108                                    " for foreign interface (ifindex %d)",
1109                                    gnlh->cmd, ifindex);
1110                         return NL_SKIP;
1111                 }
1112         }
1113
1114         if (drv->ap_scan_as_station &&
1115             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
1116              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
1117                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1118                                             IEEE80211_MODE_AP);
1119                 drv->ap_scan_as_station = 0;
1120         }
1121
1122         switch (gnlh->cmd) {
1123         case NL80211_CMD_TRIGGER_SCAN:
1124                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
1125                 break;
1126         case NL80211_CMD_NEW_SCAN_RESULTS:
1127                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
1128                 drv->scan_complete_events = 1;
1129                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1130                                      drv->ctx);
1131                 send_scan_event(drv, 0, tb);
1132                 break;
1133         case NL80211_CMD_SCAN_ABORTED:
1134                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
1135                 /*
1136                  * Need to indicate that scan results are available in order
1137                  * not to make wpa_supplicant stop its scanning.
1138                  */
1139                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1140                                      drv->ctx);
1141                 send_scan_event(drv, 1, tb);
1142                 break;
1143         case NL80211_CMD_AUTHENTICATE:
1144         case NL80211_CMD_ASSOCIATE:
1145         case NL80211_CMD_DEAUTHENTICATE:
1146         case NL80211_CMD_DISASSOCIATE:
1147         case NL80211_CMD_FRAME:
1148         case NL80211_CMD_FRAME_TX_STATUS:
1149                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
1150                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
1151                            tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
1152                            tb[NL80211_ATTR_COOKIE]);
1153                 break;
1154         case NL80211_CMD_CONNECT:
1155         case NL80211_CMD_ROAM:
1156                 mlme_event_connect(drv, gnlh->cmd,
1157                                    tb[NL80211_ATTR_STATUS_CODE],
1158                                    tb[NL80211_ATTR_MAC],
1159                                    tb[NL80211_ATTR_REQ_IE],
1160                                    tb[NL80211_ATTR_RESP_IE]);
1161                 break;
1162         case NL80211_CMD_DISCONNECT:
1163                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1164                         /*
1165                          * Avoid reporting two disassociation events that could
1166                          * confuse the core code.
1167                          */
1168                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
1169                                    "event when using userspace SME");
1170                         break;
1171                 }
1172                 drv->associated = 0;
1173                 os_memset(&data, 0, sizeof(data));
1174                 if (tb[NL80211_ATTR_REASON_CODE])
1175                         data.disassoc_info.reason_code =
1176                                 nla_get_u16(tb[NL80211_ATTR_REASON_CODE]);
1177                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, &data);
1178                 break;
1179         case NL80211_CMD_MICHAEL_MIC_FAILURE:
1180                 mlme_event_michael_mic_failure(drv, tb);
1181                 break;
1182         case NL80211_CMD_JOIN_IBSS:
1183                 mlme_event_join_ibss(drv, tb);
1184                 break;
1185         case NL80211_CMD_REMAIN_ON_CHANNEL:
1186                 mlme_event_remain_on_channel(drv, 0, tb);
1187                 break;
1188         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
1189                 mlme_event_remain_on_channel(drv, 1, tb);
1190                 break;
1191         case NL80211_CMD_NOTIFY_CQM:
1192                 nl80211_cqm_event(drv, tb);
1193                 break;
1194         default:
1195                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1196                            "(cmd=%d)", gnlh->cmd);
1197                 break;
1198         }
1199
1200         return NL_SKIP;
1201 }
1202
1203
1204 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1205                                              void *sock_ctx)
1206 {
1207         struct nl_cb *cb;
1208         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1209
1210         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1211
1212         cb = nl_cb_clone(drv->nl_cb);
1213         if (!cb)
1214                 return;
1215         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1216         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1217         nl_recvmsgs(drv->nl_handle_event, cb);
1218         nl_cb_put(cb);
1219 }
1220
1221
1222 /**
1223  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1224  * @priv: driver_nl80211 private data
1225  * @alpha2_arg: country to which to switch to
1226  * Returns: 0 on success, -1 on failure
1227  *
1228  * This asks nl80211 to set the regulatory domain for given
1229  * country ISO / IEC alpha2.
1230  */
1231 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1232 {
1233         struct i802_bss *bss = priv;
1234         struct wpa_driver_nl80211_data *drv = bss->drv;
1235         char alpha2[3];
1236         struct nl_msg *msg;
1237
1238         msg = nlmsg_alloc();
1239         if (!msg)
1240                 return -ENOMEM;
1241
1242         alpha2[0] = alpha2_arg[0];
1243         alpha2[1] = alpha2_arg[1];
1244         alpha2[2] = '\0';
1245
1246         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1247                     0, NL80211_CMD_REQ_SET_REG, 0);
1248
1249         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1250         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1251                 return -EINVAL;
1252         return 0;
1253 nla_put_failure:
1254         return -EINVAL;
1255 }
1256
1257
1258 #ifndef HOSTAPD
1259 struct wiphy_info_data {
1260         int max_scan_ssids;
1261         int ap_supported;
1262         int auth_supported;
1263         int connect_supported;
1264 };
1265
1266
1267 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1268 {
1269         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1270         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1271         struct wiphy_info_data *info = arg;
1272
1273         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1274                   genlmsg_attrlen(gnlh, 0), NULL);
1275
1276         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1277                 info->max_scan_ssids =
1278                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1279
1280         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1281                 struct nlattr *nl_mode;
1282                 int i;
1283                 nla_for_each_nested(nl_mode,
1284                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1285                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1286                                 info->ap_supported = 1;
1287                                 break;
1288                         }
1289                 }
1290         }
1291
1292         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1293                 struct nlattr *nl_cmd;
1294                 int i;
1295
1296                 nla_for_each_nested(nl_cmd,
1297                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1298                         u32 cmd = nla_get_u32(nl_cmd);
1299                         if (cmd == NL80211_CMD_AUTHENTICATE)
1300                                 info->auth_supported = 1;
1301                         else if (cmd == NL80211_CMD_CONNECT)
1302                                 info->connect_supported = 1;
1303                 }
1304         }
1305
1306         return NL_SKIP;
1307 }
1308
1309
1310 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1311                                        struct wiphy_info_data *info)
1312 {
1313         struct nl_msg *msg;
1314
1315         os_memset(info, 0, sizeof(*info));
1316         msg = nlmsg_alloc();
1317         if (!msg)
1318                 return -1;
1319
1320         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1321                     0, NL80211_CMD_GET_WIPHY, 0);
1322
1323         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1324
1325         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1326                 return 0;
1327         msg = NULL;
1328 nla_put_failure:
1329         nlmsg_free(msg);
1330         return -1;
1331 }
1332
1333
1334 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1335 {
1336         struct wiphy_info_data info;
1337         if (wpa_driver_nl80211_get_info(drv, &info))
1338                 return -1;
1339         drv->has_capability = 1;
1340         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1341         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1342                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1343                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1344                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1345         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1346                 WPA_DRIVER_CAPA_ENC_WEP104 |
1347                 WPA_DRIVER_CAPA_ENC_TKIP |
1348                 WPA_DRIVER_CAPA_ENC_CCMP;
1349         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1350                 WPA_DRIVER_AUTH_SHARED |
1351                 WPA_DRIVER_AUTH_LEAP;
1352
1353         drv->capa.max_scan_ssids = info.max_scan_ssids;
1354         if (info.ap_supported)
1355                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1356
1357         if (info.auth_supported)
1358                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1359         else if (!info.connect_supported) {
1360                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1361                            "authentication/association or connect commands");
1362                 return -1;
1363         }
1364
1365         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1366         drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CAPABLE;
1367         drv->capa.max_remain_on_chan = 5000;
1368
1369         return 0;
1370 }
1371 #endif /* HOSTAPD */
1372
1373
1374 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
1375 {
1376         int ret;
1377
1378         /* Initialize generic netlink and nl80211 */
1379
1380         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1381         if (drv->nl_cb == NULL) {
1382                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1383                            "callbacks");
1384                 goto err1;
1385         }
1386
1387         drv->nl_handle = nl80211_handle_alloc(drv->nl_cb);
1388         if (drv->nl_handle == NULL) {
1389                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1390                            "callbacks");
1391                 goto err2;
1392         }
1393
1394         drv->nl_handle_event = nl80211_handle_alloc(drv->nl_cb);
1395         if (drv->nl_handle_event == NULL) {
1396                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1397                            "callbacks (event)");
1398                 goto err2b;
1399         }
1400
1401         if (genl_connect(drv->nl_handle)) {
1402                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1403                            "netlink");
1404                 goto err3;
1405         }
1406
1407         if (genl_connect(drv->nl_handle_event)) {
1408                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1409                            "netlink (event)");
1410                 goto err3;
1411         }
1412
1413 #ifdef CONFIG_LIBNL20
1414         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1415                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1416                            "netlink cache");
1417                 goto err3;
1418         }
1419         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1420             0) {
1421                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1422                            "netlink cache (event)");
1423                 goto err3b;
1424         }
1425 #else /* CONFIG_LIBNL20 */
1426         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1427         if (drv->nl_cache == NULL) {
1428                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1429                            "netlink cache");
1430                 goto err3;
1431         }
1432         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1433         if (drv->nl_cache_event == NULL) {
1434                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1435                            "netlink cache (event)");
1436                 goto err3b;
1437         }
1438 #endif /* CONFIG_LIBNL20 */
1439
1440         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1441         if (drv->nl80211 == NULL) {
1442                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1443                            "found");
1444                 goto err4;
1445         }
1446
1447         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1448         if (ret >= 0)
1449                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1450         if (ret < 0) {
1451                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1452                            "membership for scan events: %d (%s)",
1453                            ret, strerror(-ret));
1454                 goto err4;
1455         }
1456
1457         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1458         if (ret >= 0)
1459                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1460         if (ret < 0) {
1461                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1462                            "membership for mlme events: %d (%s)",
1463                            ret, strerror(-ret));
1464                 goto err4;
1465         }
1466
1467         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1468                                  wpa_driver_nl80211_event_receive, drv, NULL);
1469
1470         return 0;
1471
1472 err4:
1473         nl_cache_free(drv->nl_cache_event);
1474 err3b:
1475         nl_cache_free(drv->nl_cache);
1476 err3:
1477         nl80211_handle_destroy(drv->nl_handle_event);
1478 err2b:
1479         nl80211_handle_destroy(drv->nl_handle);
1480 err2:
1481         nl_cb_put(drv->nl_cb);
1482 err1:
1483         return -1;
1484 }
1485
1486
1487 static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
1488 {
1489         wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");
1490         /*
1491          * This may be for any interface; use ifdown event to disable
1492          * interface.
1493          */
1494 }
1495
1496
1497 static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
1498 {
1499         struct wpa_driver_nl80211_data *drv = ctx;
1500         wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
1501         if (linux_set_iface_flags(drv->ioctl_sock, drv->first_bss.ifname, 1)) {
1502                 wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
1503                            "after rfkill unblock");
1504                 return;
1505         }
1506         /* rtnetlink ifup handler will report interface as enabled */
1507 }
1508
1509
1510 /**
1511  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1512  * @ctx: context to be used when calling wpa_supplicant functions,
1513  * e.g., wpa_supplicant_event()
1514  * @ifname: interface name, e.g., wlan0
1515  * Returns: Pointer to private data, %NULL on failure
1516  */
1517 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1518 {
1519         struct wpa_driver_nl80211_data *drv;
1520         struct netlink_config *cfg;
1521         struct rfkill_config *rcfg;
1522         struct i802_bss *bss;
1523
1524         drv = os_zalloc(sizeof(*drv));
1525         if (drv == NULL)
1526                 return NULL;
1527         drv->ctx = ctx;
1528         bss = &drv->first_bss;
1529         bss->drv = drv;
1530         os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
1531         drv->monitor_ifidx = -1;
1532         drv->monitor_sock = -1;
1533         drv->ioctl_sock = -1;
1534
1535         if (wpa_driver_nl80211_init_nl(drv)) {
1536                 os_free(drv);
1537                 return NULL;
1538         }
1539
1540         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1541         if (drv->ioctl_sock < 0) {
1542                 perror("socket(PF_INET,SOCK_DGRAM)");
1543                 goto failed;
1544         }
1545
1546         cfg = os_zalloc(sizeof(*cfg));
1547         if (cfg == NULL)
1548                 goto failed;
1549         cfg->ctx = drv;
1550         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1551         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1552         drv->netlink = netlink_init(cfg);
1553         if (drv->netlink == NULL) {
1554                 os_free(cfg);
1555                 goto failed;
1556         }
1557
1558         rcfg = os_zalloc(sizeof(*rcfg));
1559         if (rcfg == NULL)
1560                 goto failed;
1561         rcfg->ctx = drv;
1562         os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
1563         rcfg->blocked_cb = wpa_driver_nl80211_rfkill_blocked;
1564         rcfg->unblocked_cb = wpa_driver_nl80211_rfkill_unblocked;
1565         drv->rfkill = rfkill_init(rcfg);
1566         if (drv->rfkill == NULL) {
1567                 wpa_printf(MSG_DEBUG, "nl80211: RFKILL status not available");
1568                 os_free(rcfg);
1569         }
1570
1571         if (wpa_driver_nl80211_finish_drv_init(drv))
1572                 goto failed;
1573
1574         return bss;
1575
1576 failed:
1577         rfkill_deinit(drv->rfkill);
1578         netlink_deinit(drv->netlink);
1579         if (drv->ioctl_sock >= 0)
1580                 close(drv->ioctl_sock);
1581
1582         genl_family_put(drv->nl80211);
1583         nl_cache_free(drv->nl_cache);
1584         nl80211_handle_destroy(drv->nl_handle);
1585         nl_cb_put(drv->nl_cb);
1586         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1587
1588         os_free(drv);
1589         return NULL;
1590 }
1591
1592
1593 static int nl80211_register_frame(struct wpa_driver_nl80211_data *drv,
1594                                   u16 type, const u8 *match, size_t match_len)
1595 {
1596         struct nl_msg *msg;
1597         int ret = -1;
1598
1599         msg = nlmsg_alloc();
1600         if (!msg)
1601                 return -1;
1602
1603         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1604                     NL80211_CMD_REGISTER_ACTION, 0);
1605
1606         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1607         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE, type);
1608         NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1609
1610         ret = send_and_recv(drv, drv->nl_handle_event, msg, NULL, NULL);
1611         msg = NULL;
1612         if (ret) {
1613                 wpa_printf(MSG_DEBUG, "nl80211: Register Action command "
1614                            "failed: ret=%d (%s)", ret, strerror(-ret));
1615                 wpa_hexdump(MSG_DEBUG, "nl80211: Register Action match",
1616                             match, match_len);
1617                 goto nla_put_failure;
1618         }
1619         ret = 0;
1620 nla_put_failure:
1621         nlmsg_free(msg);
1622         return ret;
1623 }
1624
1625
1626 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1627                                          const u8 *match, size_t match_len)
1628 {
1629         u16 type = (WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_ACTION << 4);
1630         return nl80211_register_frame(drv, type, match, match_len);
1631 }
1632
1633
1634 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1635 {
1636 #ifdef CONFIG_P2P
1637         /* GAS Initial Request */
1638         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0a", 2) < 0)
1639                 return -1;
1640         /* GAS Initial Response */
1641         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0b", 2) < 0)
1642                 return -1;
1643         /* GAS Comeback Request */
1644         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0c", 2) < 0)
1645                 return -1;
1646         /* GAS Comeback Response */
1647         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0d", 2) < 0)
1648                 return -1;
1649         /* P2P Public Action */
1650         if (nl80211_register_action_frame(drv,
1651                                           (u8 *) "\x04\x09\x50\x6f\x9a\x09",
1652                                           6) < 0)
1653                 return -1;
1654         /* P2P Action */
1655         if (nl80211_register_action_frame(drv,
1656                                           (u8 *) "\x7f\x50\x6f\x9a\x09",
1657                                           5) < 0)
1658                 return -1;
1659 #endif /* CONFIG_P2P */
1660
1661         /* FT Action frames */
1662         if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
1663                 return -1;
1664         else
1665                 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
1666                         WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
1667
1668         return 0;
1669 }
1670
1671
1672 static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
1673 {
1674         wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
1675 }
1676
1677
1678 static int
1679 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1680 {
1681         struct i802_bss *bss = &drv->first_bss;
1682         int send_rfkill_event = 0;
1683
1684         drv->ifindex = if_nametoindex(bss->ifname);
1685         drv->first_bss.ifindex = drv->ifindex;
1686
1687 #ifndef HOSTAPD
1688         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
1689                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1690                            "use managed mode");
1691         }
1692
1693         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
1694                 if (rfkill_is_blocked(drv->rfkill)) {
1695                         wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
1696                                    "interface '%s' due to rfkill",
1697                                    bss->ifname);
1698                         drv->if_disabled = 1;
1699                         send_rfkill_event = 1;
1700                 } else {
1701                         wpa_printf(MSG_ERROR, "nl80211: Could not set "
1702                                    "interface '%s' UP", bss->ifname);
1703                         return -1;
1704                 }
1705         }
1706
1707         if (wpa_driver_nl80211_capa(drv))
1708                 return -1;
1709
1710         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1711                                1, IF_OPER_DORMANT);
1712 #endif /* HOSTAPD */
1713
1714         if (nl80211_register_action_frames(drv) < 0) {
1715                 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
1716                            "frame processing - ignore for now");
1717                 /*
1718                  * Older kernel versions did not support this, so ignore the
1719                  * error for now. Some functionality may not be available
1720                  * because of this.
1721                  */
1722         }
1723
1724         if (send_rfkill_event) {
1725                 eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
1726                                        drv, drv->ctx);
1727         }
1728
1729         return 0;
1730 }
1731
1732
1733 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1734 {
1735         struct nl_msg *msg;
1736
1737         msg = nlmsg_alloc();
1738         if (!msg)
1739                 return -ENOMEM;
1740
1741         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1742                     0, NL80211_CMD_DEL_BEACON, 0);
1743         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1744
1745         return send_and_recv_msgs(drv, msg, NULL, NULL);
1746  nla_put_failure:
1747         return -ENOBUFS;
1748 }
1749
1750
1751 /**
1752  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1753  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1754  *
1755  * Shut down driver interface and processing of driver events. Free
1756  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1757  */
1758 static void wpa_driver_nl80211_deinit(void *priv)
1759 {
1760         struct i802_bss *bss = priv;
1761         struct wpa_driver_nl80211_data *drv = bss->drv;
1762
1763         if (drv->added_if_into_bridge) {
1764                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
1765                     < 0)
1766                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1767                                    "interface %s from bridge %s: %s",
1768                                    bss->ifname, drv->brname, strerror(errno));
1769         }
1770         if (drv->added_bridge) {
1771                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1772                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1773                                    "bridge %s: %s",
1774                                    drv->brname, strerror(errno));
1775         }
1776
1777         nl80211_remove_monitor_interface(drv);
1778
1779         if (drv->nlmode == NL80211_IFTYPE_AP)
1780                 wpa_driver_nl80211_del_beacon(drv);
1781
1782 #ifdef HOSTAPD
1783         if (drv->last_freq_ht) {
1784                 /* Clear HT flags from the driver */
1785                 struct hostapd_freq_params freq;
1786                 os_memset(&freq, 0, sizeof(freq));
1787                 freq.freq = drv->last_freq;
1788                 i802_set_freq(priv, &freq);
1789         }
1790
1791         if (drv->eapol_sock >= 0) {
1792                 eloop_unregister_read_sock(drv->eapol_sock);
1793                 close(drv->eapol_sock);
1794         }
1795
1796         if (drv->if_indices != drv->default_if_indices)
1797                 os_free(drv->if_indices);
1798 #endif /* HOSTAPD */
1799
1800         if (drv->disable_11b_rates)
1801                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1802
1803         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1804         netlink_deinit(drv->netlink);
1805         rfkill_deinit(drv->rfkill);
1806
1807         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1808
1809         (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
1810         wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
1811
1812         if (drv->ioctl_sock >= 0)
1813                 close(drv->ioctl_sock);
1814
1815         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1816         genl_family_put(drv->nl80211);
1817         nl_cache_free(drv->nl_cache);
1818         nl_cache_free(drv->nl_cache_event);
1819         nl80211_handle_destroy(drv->nl_handle);
1820         nl80211_handle_destroy(drv->nl_handle_event);
1821         nl_cb_put(drv->nl_cb);
1822
1823         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1824                              drv, NULL);
1825
1826         os_free(drv->filter_ssids);
1827
1828         os_free(drv);
1829 }
1830
1831
1832 /**
1833  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1834  * @eloop_ctx: Driver private data
1835  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1836  *
1837  * This function can be used as registered timeout when starting a scan to
1838  * generate a scan completed event if the driver does not report this.
1839  */
1840 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1841 {
1842         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1843         if (drv->ap_scan_as_station) {
1844                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1845                                             IEEE80211_MODE_AP);
1846                 drv->ap_scan_as_station = 0;
1847         }
1848         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1849         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1850 }
1851
1852
1853 /**
1854  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1855  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1856  * @params: Scan parameters
1857  * Returns: 0 on success, -1 on failure
1858  */
1859 static int wpa_driver_nl80211_scan(void *priv,
1860                                    struct wpa_driver_scan_params *params)
1861 {
1862         struct i802_bss *bss = priv;
1863         struct wpa_driver_nl80211_data *drv = bss->drv;
1864         int ret = 0, timeout;
1865         struct nl_msg *msg, *ssids, *freqs;
1866         size_t i;
1867
1868         msg = nlmsg_alloc();
1869         ssids = nlmsg_alloc();
1870         freqs = nlmsg_alloc();
1871         if (!msg || !ssids || !freqs) {
1872                 nlmsg_free(msg);
1873                 nlmsg_free(ssids);
1874                 nlmsg_free(freqs);
1875                 return -1;
1876         }
1877
1878         os_free(drv->filter_ssids);
1879         drv->filter_ssids = params->filter_ssids;
1880         params->filter_ssids = NULL;
1881         drv->num_filter_ssids = params->num_filter_ssids;
1882
1883         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1884                     NL80211_CMD_TRIGGER_SCAN, 0);
1885
1886         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1887
1888         for (i = 0; i < params->num_ssids; i++) {
1889                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
1890                                   params->ssids[i].ssid,
1891                                   params->ssids[i].ssid_len);
1892                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1893                         params->ssids[i].ssid);
1894         }
1895         if (params->num_ssids)
1896                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1897
1898         if (params->extra_ies) {
1899                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
1900                                   params->extra_ies, params->extra_ies_len);
1901                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1902                         params->extra_ies);
1903         }
1904
1905         if (params->freqs) {
1906                 for (i = 0; params->freqs[i]; i++) {
1907                         wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
1908                                    "MHz", params->freqs[i]);
1909                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1910                 }
1911                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1912         }
1913
1914         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1915         msg = NULL;
1916         if (ret) {
1917                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1918                            "(%s)", ret, strerror(-ret));
1919 #ifdef HOSTAPD
1920                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1921                         /*
1922                          * mac80211 does not allow scan requests in AP mode, so
1923                          * try to do this in station mode.
1924                          */
1925                         if (wpa_driver_nl80211_set_mode(bss,
1926                                                         IEEE80211_MODE_INFRA))
1927                                 goto nla_put_failure;
1928
1929                         if (wpa_driver_nl80211_scan(drv, params)) {
1930                                 wpa_driver_nl80211_set_mode(bss,
1931                                                             IEEE80211_MODE_AP);
1932                                 goto nla_put_failure;
1933                         }
1934
1935                         /* Restore AP mode when processing scan results */
1936                         drv->ap_scan_as_station = 1;
1937                         ret = 0;
1938                 } else
1939                         goto nla_put_failure;
1940 #else /* HOSTAPD */
1941                 goto nla_put_failure;
1942 #endif /* HOSTAPD */
1943         }
1944
1945         /* Not all drivers generate "scan completed" wireless event, so try to
1946          * read results after a timeout. */
1947         timeout = 10;
1948         if (drv->scan_complete_events) {
1949                 /*
1950                  * The driver seems to deliver events to notify when scan is
1951                  * complete, so use longer timeout to avoid race conditions
1952                  * with scanning and following association request.
1953                  */
1954                 timeout = 30;
1955         }
1956         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1957                    "seconds", ret, timeout);
1958         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1959         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1960                                drv, drv->ctx);
1961
1962 nla_put_failure:
1963         nlmsg_free(ssids);
1964         nlmsg_free(msg);
1965         nlmsg_free(freqs);
1966         return ret;
1967 }
1968
1969
1970 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
1971 {
1972         const u8 *end, *pos;
1973
1974         if (ies == NULL)
1975                 return NULL;
1976
1977         pos = ies;
1978         end = ies + ies_len;
1979
1980         while (pos + 1 < end) {
1981                 if (pos + 2 + pos[1] > end)
1982                         break;
1983                 if (pos[0] == ie)
1984                         return pos;
1985                 pos += 2 + pos[1];
1986         }
1987
1988         return NULL;
1989 }
1990
1991
1992 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
1993                                  const u8 *ie, size_t ie_len)
1994 {
1995         const u8 *ssid;
1996         size_t i;
1997
1998         if (drv->filter_ssids == NULL)
1999                 return 0;
2000
2001         ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
2002         if (ssid == NULL)
2003                 return 1;
2004
2005         for (i = 0; i < drv->num_filter_ssids; i++) {
2006                 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
2007                     os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
2008                     0)
2009                         return 0;
2010         }
2011
2012         return 1;
2013 }
2014
2015
2016 struct nl80211_bss_info_arg {
2017         struct wpa_driver_nl80211_data *drv;
2018         struct wpa_scan_results *res;
2019 };
2020
2021 static int bss_info_handler(struct nl_msg *msg, void *arg)
2022 {
2023         struct nlattr *tb[NL80211_ATTR_MAX + 1];
2024         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2025         struct nlattr *bss[NL80211_BSS_MAX + 1];
2026         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2027                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
2028                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2029                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2030                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2031                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2032                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
2033                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2034                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2035                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2036                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2037                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
2038         };
2039         struct nl80211_bss_info_arg *_arg = arg;
2040         struct wpa_scan_results *res = _arg->res;
2041         struct wpa_scan_res **tmp;
2042         struct wpa_scan_res *r;
2043         const u8 *ie, *beacon_ie;
2044         size_t ie_len, beacon_ie_len;
2045         u8 *pos;
2046
2047         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2048                   genlmsg_attrlen(gnlh, 0), NULL);
2049         if (!tb[NL80211_ATTR_BSS])
2050                 return NL_SKIP;
2051         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2052                              bss_policy))
2053                 return NL_SKIP;
2054         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
2055                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2056                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2057         } else {
2058                 ie = NULL;
2059                 ie_len = 0;
2060         }
2061         if (bss[NL80211_BSS_BEACON_IES]) {
2062                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
2063                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
2064         } else {
2065                 beacon_ie = NULL;
2066                 beacon_ie_len = 0;
2067         }
2068
2069         if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
2070                                   ie ? ie_len : beacon_ie_len))
2071                 return NL_SKIP;
2072
2073         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
2074         if (r == NULL)
2075                 return NL_SKIP;
2076         if (bss[NL80211_BSS_BSSID])
2077                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
2078                           ETH_ALEN);
2079         if (bss[NL80211_BSS_FREQUENCY])
2080                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2081         if (bss[NL80211_BSS_BEACON_INTERVAL])
2082                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
2083         if (bss[NL80211_BSS_CAPABILITY])
2084                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2085         r->flags |= WPA_SCAN_NOISE_INVALID;
2086         if (bss[NL80211_BSS_SIGNAL_MBM]) {
2087                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
2088                 r->level /= 100; /* mBm to dBm */
2089                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
2090         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
2091                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
2092                 r->flags |= WPA_SCAN_LEVEL_INVALID;
2093         } else
2094                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
2095         if (bss[NL80211_BSS_TSF])
2096                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
2097         if (bss[NL80211_BSS_SEEN_MS_AGO])
2098                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
2099         r->ie_len = ie_len;
2100         pos = (u8 *) (r + 1);
2101         if (ie) {
2102                 os_memcpy(pos, ie, ie_len);
2103                 pos += ie_len;
2104         }
2105         r->beacon_ie_len = beacon_ie_len;
2106         if (beacon_ie)
2107                 os_memcpy(pos, beacon_ie, beacon_ie_len);
2108
2109         if (bss[NL80211_BSS_STATUS]) {
2110                 enum nl80211_bss_status status;
2111                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
2112                 switch (status) {
2113                 case NL80211_BSS_STATUS_AUTHENTICATED:
2114                         r->flags |= WPA_SCAN_AUTHENTICATED;
2115                         break;
2116                 case NL80211_BSS_STATUS_ASSOCIATED:
2117                         r->flags |= WPA_SCAN_ASSOCIATED;
2118                         break;
2119                 default:
2120                         break;
2121                 }
2122         }
2123
2124         tmp = os_realloc(res->res,
2125                          (res->num + 1) * sizeof(struct wpa_scan_res *));
2126         if (tmp == NULL) {
2127                 os_free(r);
2128                 return NL_SKIP;
2129         }
2130         tmp[res->num++] = r;
2131         res->res = tmp;
2132
2133         return NL_SKIP;
2134 }
2135
2136
2137 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
2138                                  const u8 *addr)
2139 {
2140         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
2141                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
2142                            "mismatch (" MACSTR ")", MAC2STR(addr));
2143                 wpa_driver_nl80211_mlme(drv, addr,
2144                                         NL80211_CMD_DEAUTHENTICATE,
2145                                         WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
2146         }
2147 }
2148
2149
2150 static void wpa_driver_nl80211_check_bss_status(
2151         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
2152 {
2153         size_t i;
2154
2155         for (i = 0; i < res->num; i++) {
2156                 struct wpa_scan_res *r = res->res[i];
2157                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
2158                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2159                                    "indicates BSS status with " MACSTR
2160                                    " as authenticated",
2161                                    MAC2STR(r->bssid));
2162                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2163                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
2164                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
2165                             0) {
2166                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
2167                                            " in local state (auth=" MACSTR
2168                                            " assoc=" MACSTR ")",
2169                                            MAC2STR(drv->auth_bssid),
2170                                            MAC2STR(drv->bssid));
2171                                 clear_state_mismatch(drv, r->bssid);
2172                         }
2173                 }
2174
2175                 if (r->flags & WPA_SCAN_ASSOCIATED) {
2176                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2177                                    "indicate BSS status with " MACSTR
2178                                    " as associated",
2179                                    MAC2STR(r->bssid));
2180                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2181                             !drv->associated) {
2182                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2183                                            "(not associated) does not match "
2184                                            "with BSS state");
2185                                 clear_state_mismatch(drv, r->bssid);
2186                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
2187                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
2188                                    0) {
2189                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2190                                            "(associated with " MACSTR ") does "
2191                                            "not match with BSS state",
2192                                            MAC2STR(drv->bssid));
2193                                 clear_state_mismatch(drv, r->bssid);
2194                                 clear_state_mismatch(drv, drv->bssid);
2195                         }
2196                 }
2197         }
2198 }
2199
2200
2201 static void wpa_scan_results_free(struct wpa_scan_results *res)
2202 {
2203         size_t i;
2204
2205         if (res == NULL)
2206                 return;
2207
2208         for (i = 0; i < res->num; i++)
2209                 os_free(res->res[i]);
2210         os_free(res->res);
2211         os_free(res);
2212 }
2213
2214
2215 static struct wpa_scan_results *
2216 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
2217 {
2218         struct nl_msg *msg;
2219         struct wpa_scan_results *res;
2220         int ret;
2221         struct nl80211_bss_info_arg arg;
2222
2223         res = os_zalloc(sizeof(*res));
2224         if (res == NULL)
2225                 return NULL;
2226         msg = nlmsg_alloc();
2227         if (!msg)
2228                 goto nla_put_failure;
2229
2230         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
2231                     NL80211_CMD_GET_SCAN, 0);
2232         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2233
2234         arg.drv = drv;
2235         arg.res = res;
2236         ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
2237         msg = NULL;
2238         if (ret == 0) {
2239                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
2240                            (unsigned long) res->num);
2241                 return res;
2242         }
2243         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
2244                    "(%s)", ret, strerror(-ret));
2245 nla_put_failure:
2246         nlmsg_free(msg);
2247         wpa_scan_results_free(res);
2248         return NULL;
2249 }
2250
2251
2252 /**
2253  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
2254  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2255  * Returns: Scan results on success, -1 on failure
2256  */
2257 static struct wpa_scan_results *
2258 wpa_driver_nl80211_get_scan_results(void *priv)
2259 {
2260         struct i802_bss *bss = priv;
2261         struct wpa_driver_nl80211_data *drv = bss->drv;
2262         struct wpa_scan_results *res;
2263
2264         res = nl80211_get_scan_results(drv);
2265         if (res)
2266                 wpa_driver_nl80211_check_bss_status(drv, res);
2267         return res;
2268 }
2269
2270
2271 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
2272 {
2273         struct wpa_scan_results *res;
2274         size_t i;
2275
2276         res = nl80211_get_scan_results(drv);
2277         if (res == NULL) {
2278                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
2279                 return;
2280         }
2281
2282         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
2283         for (i = 0; i < res->num; i++) {
2284                 struct wpa_scan_res *r = res->res[i];
2285                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
2286                            (int) i, (int) res->num, MAC2STR(r->bssid),
2287                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
2288                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
2289         }
2290
2291         wpa_scan_results_free(res);
2292 }
2293
2294
2295 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
2296                                       enum wpa_alg alg, const u8 *addr,
2297                                       int key_idx, int set_tx,
2298                                       const u8 *seq, size_t seq_len,
2299                                       const u8 *key, size_t key_len)
2300 {
2301         struct i802_bss *bss = priv;
2302         struct wpa_driver_nl80211_data *drv = bss->drv;
2303         int ifindex = if_nametoindex(ifname);
2304         struct nl_msg *msg;
2305         int ret;
2306
2307         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
2308                    "set_tx=%d seq_len=%lu key_len=%lu",
2309                    __func__, ifindex, alg, addr, key_idx, set_tx,
2310                    (unsigned long) seq_len, (unsigned long) key_len);
2311
2312         msg = nlmsg_alloc();
2313         if (!msg)
2314                 return -ENOMEM;
2315
2316         if (alg == WPA_ALG_NONE) {
2317                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2318                             0, NL80211_CMD_DEL_KEY, 0);
2319         } else {
2320                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2321                             0, NL80211_CMD_NEW_KEY, 0);
2322                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2323                 switch (alg) {
2324                 case WPA_ALG_WEP:
2325                         if (key_len == 5)
2326                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2327                                             WLAN_CIPHER_SUITE_WEP40);
2328                         else
2329                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2330                                             WLAN_CIPHER_SUITE_WEP104);
2331                         break;
2332                 case WPA_ALG_TKIP:
2333                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2334                                     WLAN_CIPHER_SUITE_TKIP);
2335                         break;
2336                 case WPA_ALG_CCMP:
2337                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2338                                     WLAN_CIPHER_SUITE_CCMP);
2339                         break;
2340                 case WPA_ALG_IGTK:
2341                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2342                                     WLAN_CIPHER_SUITE_AES_CMAC);
2343                         break;
2344                 default:
2345                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2346                                    "algorithm %d", __func__, alg);
2347                         nlmsg_free(msg);
2348                         return -1;
2349                 }
2350         }
2351
2352         if (seq && seq_len)
2353                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
2354
2355         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2356         {
2357                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
2358                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2359         }
2360         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2361         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2362
2363         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2364         if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
2365                 ret = 0;
2366         if (ret)
2367                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2368                            ret, strerror(-ret));
2369
2370         /*
2371          * If we failed or don't need to set the default TX key (below),
2372          * we're done here.
2373          */
2374         if (ret || !set_tx || alg == WPA_ALG_NONE)
2375                 return ret;
2376 #ifdef HOSTAPD
2377         if (addr)
2378                 return ret;
2379 #else /* HOSTAPD */
2380         if (drv->nlmode == NL80211_IFTYPE_AP && addr)
2381                 return ret;
2382 #endif /* HOSTAPD */
2383
2384         msg = nlmsg_alloc();
2385         if (!msg)
2386                 return -ENOMEM;
2387
2388         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2389                     0, NL80211_CMD_SET_KEY, 0);
2390         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2391         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2392         if (alg == WPA_ALG_IGTK)
2393                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2394         else
2395                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2396
2397         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2398         if (ret == -ENOENT)
2399                 ret = 0;
2400         if (ret)
2401                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2402                            "err=%d %s)", ret, strerror(-ret));
2403         return ret;
2404
2405 nla_put_failure:
2406         return -ENOBUFS;
2407 }
2408
2409
2410 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2411                       int key_idx, int defkey,
2412                       const u8 *seq, size_t seq_len,
2413                       const u8 *key, size_t key_len)
2414 {
2415         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2416         if (!key_attr)
2417                 return -1;
2418
2419         if (defkey && alg == WPA_ALG_IGTK)
2420                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2421         else if (defkey)
2422                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2423
2424         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2425
2426         switch (alg) {
2427         case WPA_ALG_WEP:
2428                 if (key_len == 5)
2429                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2430                                     WLAN_CIPHER_SUITE_WEP40);
2431                 else
2432                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2433                                     WLAN_CIPHER_SUITE_WEP104);
2434                 break;
2435         case WPA_ALG_TKIP:
2436                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2437                 break;
2438         case WPA_ALG_CCMP:
2439                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2440                 break;
2441         case WPA_ALG_IGTK:
2442                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2443                             WLAN_CIPHER_SUITE_AES_CMAC);
2444                 break;
2445         default:
2446                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2447                            "algorithm %d", __func__, alg);
2448                 return -1;
2449         }
2450
2451         if (seq && seq_len)
2452                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2453
2454         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2455
2456         nla_nest_end(msg, key_attr);
2457
2458         return 0;
2459  nla_put_failure:
2460         return -1;
2461 }
2462
2463
2464 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2465                                  struct nl_msg *msg)
2466 {
2467         int i, privacy = 0;
2468         struct nlattr *nl_keys, *nl_key;
2469
2470         for (i = 0; i < 4; i++) {
2471                 if (!params->wep_key[i])
2472                         continue;
2473                 privacy = 1;
2474                 break;
2475         }
2476         if (!privacy)
2477                 return 0;
2478
2479         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2480
2481         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2482         if (!nl_keys)
2483                 goto nla_put_failure;
2484
2485         for (i = 0; i < 4; i++) {
2486                 if (!params->wep_key[i])
2487                         continue;
2488
2489                 nl_key = nla_nest_start(msg, i);
2490                 if (!nl_key)
2491                         goto nla_put_failure;
2492
2493                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2494                         params->wep_key[i]);
2495                 if (params->wep_key_len[i] == 5)
2496                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2497                                     WLAN_CIPHER_SUITE_WEP40);
2498                 else
2499                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2500                                     WLAN_CIPHER_SUITE_WEP104);
2501
2502                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2503
2504                 if (i == params->wep_tx_keyidx)
2505                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2506
2507                 nla_nest_end(msg, nl_key);
2508         }
2509         nla_nest_end(msg, nl_keys);
2510
2511         return 0;
2512
2513 nla_put_failure:
2514         return -ENOBUFS;
2515 }
2516
2517
2518 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2519                                    const u8 *addr, int cmd, u16 reason_code,
2520                                    int local_state_change)
2521 {
2522         int ret = -1;
2523         struct nl_msg *msg;
2524
2525         msg = nlmsg_alloc();
2526         if (!msg)
2527                 return -1;
2528
2529         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2530
2531         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2532         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2533         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2534         if (local_state_change)
2535                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2536
2537         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2538         msg = NULL;
2539         if (ret) {
2540                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2541                            "(%s)", ret, strerror(-ret));
2542                 goto nla_put_failure;
2543         }
2544         ret = 0;
2545
2546 nla_put_failure:
2547         nlmsg_free(msg);
2548         return ret;
2549 }
2550
2551
2552 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2553                                          const u8 *addr, int reason_code)
2554 {
2555         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2556                    __func__, MAC2STR(addr), reason_code);
2557         drv->associated = 0;
2558         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2559                                        reason_code, 0);
2560 }
2561
2562
2563 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2564                                              int reason_code)
2565 {
2566         struct i802_bss *bss = priv;
2567         struct wpa_driver_nl80211_data *drv = bss->drv;
2568         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2569                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2570         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2571                    __func__, MAC2STR(addr), reason_code);
2572         drv->associated = 0;
2573         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2574                                        reason_code, 0);
2575 }
2576
2577
2578 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2579                                            int reason_code)
2580 {
2581         struct i802_bss *bss = priv;
2582         struct wpa_driver_nl80211_data *drv = bss->drv;
2583         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2584                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2585         wpa_printf(MSG_DEBUG, "%s", __func__);
2586         drv->associated = 0;
2587         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2588                                        reason_code, 0);
2589 }
2590
2591
2592 static int wpa_driver_nl80211_authenticate(
2593         void *priv, struct wpa_driver_auth_params *params)
2594 {
2595         struct i802_bss *bss = priv;
2596         struct wpa_driver_nl80211_data *drv = bss->drv;
2597         int ret = -1, i;
2598         struct nl_msg *msg;
2599         enum nl80211_auth_type type;
2600         int count = 0;
2601
2602         drv->associated = 0;
2603         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2604         /* FIX: IBSS mode */
2605         if (drv->nlmode != NL80211_IFTYPE_STATION)
2606                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2607
2608         if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2609                 return -1;
2610
2611 retry:
2612         msg = nlmsg_alloc();
2613         if (!msg)
2614                 return -1;
2615
2616         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2617                    drv->ifindex);
2618
2619         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2620                     NL80211_CMD_AUTHENTICATE, 0);
2621
2622         for (i = 0; i < 4; i++) {
2623                 if (!params->wep_key[i])
2624                         continue;
2625                 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
2626                                            NULL, i,
2627                                            i == params->wep_tx_keyidx, NULL, 0,
2628                                            params->wep_key[i],
2629                                            params->wep_key_len[i]);
2630                 if (params->wep_tx_keyidx != i)
2631                         continue;
2632                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2633                                params->wep_key[i], params->wep_key_len[i])) {
2634                         nlmsg_free(msg);
2635                         return -1;
2636                 }
2637         }
2638
2639         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2640         if (params->bssid) {
2641                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2642                            MAC2STR(params->bssid));
2643                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2644         }
2645         if (params->freq) {
2646                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2647                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2648         }
2649         if (params->ssid) {
2650                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2651                                   params->ssid, params->ssid_len);
2652                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2653                         params->ssid);
2654         }
2655         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2656         if (params->ie)
2657                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2658         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2659                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2660         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2661                 type = NL80211_AUTHTYPE_SHARED_KEY;
2662         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2663                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2664         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2665                 type = NL80211_AUTHTYPE_FT;
2666         else
2667                 goto nla_put_failure;
2668         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2669         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2670         if (params->local_state_change) {
2671                 wpa_printf(MSG_DEBUG, "  * Local state change only");
2672                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2673         }
2674
2675         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2676         msg = NULL;
2677         if (ret) {
2678                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2679                            "(%s)", ret, strerror(-ret));
2680                 count++;
2681                 if (ret == -EALREADY && count == 1 && params->bssid &&
2682                     !params->local_state_change) {
2683                         /*
2684                          * mac80211 does not currently accept new
2685                          * authentication if we are already authenticated. As a
2686                          * workaround, force deauthentication and try again.
2687                          */
2688                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2689                                    "after forced deauthentication");
2690                         wpa_driver_nl80211_deauthenticate(
2691                                 bss, params->bssid,
2692                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2693                         nlmsg_free(msg);
2694                         goto retry;
2695                 }
2696                 goto nla_put_failure;
2697         }
2698         ret = 0;
2699         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2700                    "successfully");
2701
2702 nla_put_failure:
2703         nlmsg_free(msg);
2704         return ret;
2705 }
2706
2707
2708 struct phy_info_arg {
2709         u16 *num_modes;
2710         struct hostapd_hw_modes *modes;
2711 };
2712
2713 static int phy_info_handler(struct nl_msg *msg, void *arg)
2714 {
2715         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2716         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2717         struct phy_info_arg *phy_info = arg;
2718
2719         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2720
2721         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2722         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2723                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2724                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2725                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2726                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2727                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2728                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2729         };
2730
2731         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2732         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2733                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2734                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2735         };
2736
2737         struct nlattr *nl_band;
2738         struct nlattr *nl_freq;
2739         struct nlattr *nl_rate;
2740         int rem_band, rem_freq, rem_rate;
2741         struct hostapd_hw_modes *mode;
2742         int idx, mode_is_set;
2743
2744         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2745                   genlmsg_attrlen(gnlh, 0), NULL);
2746
2747         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2748                 return NL_SKIP;
2749
2750         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2751                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2752                 if (!mode)
2753                         return NL_SKIP;
2754                 phy_info->modes = mode;
2755
2756                 mode_is_set = 0;
2757
2758                 mode = &phy_info->modes[*(phy_info->num_modes)];
2759                 memset(mode, 0, sizeof(*mode));
2760                 *(phy_info->num_modes) += 1;
2761
2762                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2763                           nla_len(nl_band), NULL);
2764
2765                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2766                         mode->ht_capab = nla_get_u16(
2767                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2768                 }
2769
2770                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2771                         mode->a_mpdu_params |= nla_get_u8(
2772                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2773                                 0x03;
2774                 }
2775
2776                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2777                         mode->a_mpdu_params |= nla_get_u8(
2778                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2779                                 2;
2780                 }
2781
2782                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2783                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2784                         u8 *mcs;
2785                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2786                         os_memcpy(mode->mcs_set, mcs, 16);
2787                 }
2788
2789                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2790                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2791                                   nla_len(nl_freq), freq_policy);
2792                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2793                                 continue;
2794                         mode->num_channels++;
2795                 }
2796
2797                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2798                 if (!mode->channels)
2799                         return NL_SKIP;
2800
2801                 idx = 0;
2802
2803                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2804                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2805                                   nla_len(nl_freq), freq_policy);
2806                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2807                                 continue;
2808
2809                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2810                         mode->channels[idx].flag = 0;
2811
2812                         if (!mode_is_set) {
2813                                 /* crude heuristic */
2814                                 if (mode->channels[idx].freq < 4000)
2815                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2816                                 else
2817                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2818                                 mode_is_set = 1;
2819                         }
2820
2821                         /* crude heuristic */
2822                         if (mode->channels[idx].freq < 4000)
2823                                 if (mode->channels[idx].freq == 2484)
2824                                         mode->channels[idx].chan = 14;
2825                                 else
2826                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2827                         else
2828                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2829
2830                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2831                                 mode->channels[idx].flag |=
2832                                         HOSTAPD_CHAN_DISABLED;
2833                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2834                                 mode->channels[idx].flag |=
2835                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2836                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2837                                 mode->channels[idx].flag |=
2838                                         HOSTAPD_CHAN_NO_IBSS;
2839                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2840                                 mode->channels[idx].flag |=
2841                                         HOSTAPD_CHAN_RADAR;
2842
2843                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2844                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2845                                 mode->channels[idx].max_tx_power =
2846                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2847
2848                         idx++;
2849                 }
2850
2851                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2852                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2853                                   nla_len(nl_rate), rate_policy);
2854                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2855                                 continue;
2856                         mode->num_rates++;
2857                 }
2858
2859                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2860                 if (!mode->rates)
2861                         return NL_SKIP;
2862
2863                 idx = 0;
2864
2865                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2866                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2867                                   nla_len(nl_rate), rate_policy);
2868                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2869                                 continue;
2870                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2871
2872                         /* crude heuristic */
2873                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2874                             mode->rates[idx] > 200)
2875                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2876
2877                         idx++;
2878                 }
2879         }
2880
2881         return NL_SKIP;
2882 }
2883
2884 static struct hostapd_hw_modes *
2885 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2886 {
2887         u16 m;
2888         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2889         int i, mode11g_idx = -1;
2890
2891         /* If only 802.11g mode is included, use it to construct matching
2892          * 802.11b mode data. */
2893
2894         for (m = 0; m < *num_modes; m++) {
2895                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2896                         return modes; /* 802.11b already included */
2897                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2898                         mode11g_idx = m;
2899         }
2900
2901         if (mode11g_idx < 0)
2902                 return modes; /* 2.4 GHz band not supported at all */
2903
2904         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2905         if (nmodes == NULL)
2906                 return modes; /* Could not add 802.11b mode */
2907
2908         mode = &nmodes[*num_modes];
2909         os_memset(mode, 0, sizeof(*mode));
2910         (*num_modes)++;
2911         modes = nmodes;
2912
2913         mode->mode = HOSTAPD_MODE_IEEE80211B;
2914
2915         mode11g = &modes[mode11g_idx];
2916         mode->num_channels = mode11g->num_channels;
2917         mode->channels = os_malloc(mode11g->num_channels *
2918                                    sizeof(struct hostapd_channel_data));
2919         if (mode->channels == NULL) {
2920                 (*num_modes)--;
2921                 return modes; /* Could not add 802.11b mode */
2922         }
2923         os_memcpy(mode->channels, mode11g->channels,
2924                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2925
2926         mode->num_rates = 0;
2927         mode->rates = os_malloc(4 * sizeof(int));
2928         if (mode->rates == NULL) {
2929                 os_free(mode->channels);
2930                 (*num_modes)--;
2931                 return modes; /* Could not add 802.11b mode */
2932         }
2933
2934         for (i = 0; i < mode11g->num_rates; i++) {
2935                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2936                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2937                         continue;
2938                 mode->rates[mode->num_rates] = mode11g->rates[i];
2939                 mode->num_rates++;
2940                 if (mode->num_rates == 4)
2941                         break;
2942         }
2943
2944         if (mode->num_rates == 0) {
2945                 os_free(mode->channels);
2946                 os_free(mode->rates);
2947                 (*num_modes)--;
2948                 return modes; /* No 802.11b rates */
2949         }
2950
2951         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2952                    "information");
2953
2954         return modes;
2955 }
2956
2957
2958 static struct hostapd_hw_modes *
2959 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2960 {
2961         struct i802_bss *bss = priv;
2962         struct wpa_driver_nl80211_data *drv = bss->drv;
2963         struct nl_msg *msg;
2964         struct phy_info_arg result = {
2965                 .num_modes = num_modes,
2966                 .modes = NULL,
2967         };
2968
2969         *num_modes = 0;
2970         *flags = 0;
2971
2972         msg = nlmsg_alloc();
2973         if (!msg)
2974                 return NULL;
2975
2976         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2977                     0, NL80211_CMD_GET_WIPHY, 0);
2978
2979         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2980
2981         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2982                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2983  nla_put_failure:
2984         return NULL;
2985 }
2986
2987
2988 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2989                                          const void *data, size_t len,
2990                                          int encrypt)
2991 {
2992         __u8 rtap_hdr[] = {
2993                 0x00, 0x00, /* radiotap version */
2994                 0x0e, 0x00, /* radiotap length */
2995                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2996                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2997                 0x00,       /* padding */
2998                 0x00, 0x00, /* RX and TX flags to indicate that */
2999                 0x00, 0x00, /* this is the injected frame directly */
3000         };
3001         struct iovec iov[2] = {
3002                 {
3003                         .iov_base = &rtap_hdr,
3004                         .iov_len = sizeof(rtap_hdr),
3005                 },
3006                 {
3007                         .iov_base = (void *) data,
3008                         .iov_len = len,
3009                 }
3010         };
3011         struct msghdr msg = {
3012                 .msg_name = NULL,
3013                 .msg_namelen = 0,
3014                 .msg_iov = iov,
3015                 .msg_iovlen = 2,
3016                 .msg_control = NULL,
3017                 .msg_controllen = 0,
3018                 .msg_flags = 0,
3019         };
3020
3021         if (encrypt)
3022                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
3023
3024         return sendmsg(drv->monitor_sock, &msg, 0);
3025 }
3026
3027
3028 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
3029                                         size_t data_len)
3030 {
3031         struct i802_bss *bss = priv;
3032         struct wpa_driver_nl80211_data *drv = bss->drv;
3033         struct ieee80211_mgmt *mgmt;
3034         int encrypt = 1;
3035         u16 fc;
3036
3037         mgmt = (struct ieee80211_mgmt *) data;
3038         fc = le_to_host16(mgmt->frame_control);
3039
3040         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
3041             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
3042                 /*
3043                  * Only one of the authentication frame types is encrypted.
3044                  * In order for static WEP encryption to work properly (i.e.,
3045                  * to not encrypt the frame), we need to tell mac80211 about
3046                  * the frames that must not be encrypted.
3047                  */
3048                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
3049                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
3050                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
3051                         encrypt = 0;
3052         }
3053
3054         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
3055 }
3056
3057
3058 static int wpa_driver_nl80211_set_beacon(void *priv,
3059                                          const u8 *head, size_t head_len,
3060                                          const u8 *tail, size_t tail_len,
3061                                          int dtim_period, int beacon_int)
3062 {
3063         struct i802_bss *bss = priv;
3064         struct wpa_driver_nl80211_data *drv = bss->drv;
3065         struct nl_msg *msg;
3066         u8 cmd = NL80211_CMD_NEW_BEACON;
3067         int ret;
3068         int beacon_set;
3069         int ifindex = if_nametoindex(bss->ifname);
3070
3071         beacon_set = bss->beacon_set;
3072
3073         msg = nlmsg_alloc();
3074         if (!msg)
3075                 return -ENOMEM;
3076
3077         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
3078                    beacon_set);
3079         if (beacon_set)
3080                 cmd = NL80211_CMD_SET_BEACON;
3081
3082         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3083                     0, cmd, 0);
3084         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3085         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3086         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3087         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
3088         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3089
3090         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3091         if (ret) {
3092                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
3093                            ret, strerror(-ret));
3094         } else {
3095                 bss->beacon_set = 1;
3096         }
3097         return ret;
3098  nla_put_failure:
3099         return -ENOBUFS;
3100 }
3101
3102
3103 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
3104                                        int freq, int ht_enabled,
3105                                        int sec_channel_offset)
3106 {
3107         struct nl_msg *msg;
3108         int ret;
3109
3110         msg = nlmsg_alloc();
3111         if (!msg)
3112                 return -1;
3113
3114         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3115                     NL80211_CMD_SET_WIPHY, 0);
3116
3117         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3118         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
3119         if (ht_enabled) {
3120                 switch (sec_channel_offset) {
3121                 case -1:
3122                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3123                                     NL80211_CHAN_HT40MINUS);
3124                         break;
3125                 case 1:
3126                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3127                                     NL80211_CHAN_HT40PLUS);
3128                         break;
3129                 default:
3130                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3131                                     NL80211_CHAN_HT20);
3132                         break;
3133                 }
3134         }
3135
3136         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3137         if (ret == 0)
3138                 return 0;
3139         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
3140                    "%d (%s)", freq, ret, strerror(-ret));
3141 nla_put_failure:
3142         return -1;
3143 }
3144
3145
3146 static int wpa_driver_nl80211_sta_add(void *priv,
3147                                       struct hostapd_sta_add_params *params)
3148 {
3149         struct i802_bss *bss = priv;
3150         struct wpa_driver_nl80211_data *drv = bss->drv;
3151         struct nl_msg *msg;
3152         int ret = -ENOBUFS;
3153
3154         msg = nlmsg_alloc();
3155         if (!msg)
3156                 return -ENOMEM;
3157
3158         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3159                     0, NL80211_CMD_NEW_STATION, 0);
3160
3161         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
3162         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3163         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3164         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3165                 params->supp_rates);
3166         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3167                     params->listen_interval);
3168         if (params->ht_capabilities) {
3169                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3170                         sizeof(*params->ht_capabilities),
3171                         params->ht_capabilities);
3172         }
3173
3174         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3175         if (ret)
3176                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3177                            "result: %d (%s)", ret, strerror(-ret));
3178         if (ret == -EEXIST)
3179                 ret = 0;
3180  nla_put_failure:
3181         return ret;
3182 }
3183
3184
3185 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
3186 {
3187         struct i802_bss *bss = priv;
3188         struct wpa_driver_nl80211_data *drv = bss->drv;
3189         struct nl_msg *msg;
3190         int ret;
3191
3192         msg = nlmsg_alloc();
3193         if (!msg)
3194                 return -ENOMEM;
3195
3196         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3197                     0, NL80211_CMD_DEL_STATION, 0);
3198
3199         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3200                     if_nametoindex(bss->ifname));
3201         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3202
3203         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3204         if (ret == -ENOENT)
3205                 return 0;
3206         return ret;
3207  nla_put_failure:
3208         return -ENOBUFS;
3209 }
3210
3211
3212 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
3213                                  int ifidx)
3214 {
3215         struct nl_msg *msg;
3216
3217         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
3218
3219 #ifdef HOSTAPD
3220         /* stop listening for EAPOL on this interface */
3221         del_ifidx(drv, ifidx);
3222 #endif /* HOSTAPD */
3223
3224         msg = nlmsg_alloc();
3225         if (!msg)
3226                 goto nla_put_failure;
3227
3228         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3229                     0, NL80211_CMD_DEL_INTERFACE, 0);
3230         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3231
3232         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3233                 return;
3234  nla_put_failure:
3235         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
3236 }
3237
3238
3239 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
3240                                      const char *ifname,
3241                                      enum nl80211_iftype iftype,
3242                                      const u8 *addr, int wds)
3243 {
3244         struct nl_msg *msg, *flags = NULL;
3245         int ifidx;
3246         int ret = -ENOBUFS;
3247
3248         msg = nlmsg_alloc();
3249         if (!msg)
3250                 return -1;
3251
3252         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3253                     0, NL80211_CMD_NEW_INTERFACE, 0);
3254         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3255         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3256         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3257
3258         if (iftype == NL80211_IFTYPE_MONITOR) {
3259                 int err;
3260
3261                 flags = nlmsg_alloc();
3262                 if (!flags)
3263                         goto nla_put_failure;
3264
3265                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3266
3267                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3268
3269                 nlmsg_free(flags);
3270
3271                 if (err)
3272                         goto nla_put_failure;
3273         } else if (wds) {
3274                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
3275         }
3276
3277         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3278         if (ret) {
3279  nla_put_failure:
3280                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
3281                            ifname, ret, strerror(-ret));
3282                 return ret;
3283         }
3284
3285         ifidx = if_nametoindex(ifname);
3286         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
3287                    ifname, ifidx);
3288
3289         if (ifidx <= 0)
3290                 return -1;
3291
3292 #ifdef HOSTAPD
3293         /* start listening for EAPOL on this interface */
3294         add_ifidx(drv, ifidx);
3295 #endif /* HOSTAPD */
3296
3297         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
3298             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
3299                 nl80211_remove_iface(drv, ifidx);
3300                 return -1;
3301         }
3302
3303         return ifidx;
3304 }
3305
3306
3307 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3308                                 const char *ifname, enum nl80211_iftype iftype,
3309                                 const u8 *addr, int wds)
3310 {
3311         int ret;
3312
3313         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
3314
3315         /* if error occured and interface exists already */
3316         if (ret == -ENFILE && if_nametoindex(ifname)) {
3317                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
3318
3319                 /* Try to remove the interface that was already there. */
3320                 nl80211_remove_iface(drv, if_nametoindex(ifname));
3321
3322                 /* Try to create the interface again */
3323                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
3324                                                 wds);
3325         }
3326
3327         if (ret >= 0 && drv->disable_11b_rates)
3328                 nl80211_disable_11b_rates(drv, ret, 1);
3329
3330         return ret;
3331 }
3332
3333
3334 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
3335 {
3336         struct ieee80211_hdr *hdr;
3337         u16 fc;
3338         union wpa_event_data event;
3339
3340         hdr = (struct ieee80211_hdr *) buf;
3341         fc = le_to_host16(hdr->frame_control);
3342
3343         os_memset(&event, 0, sizeof(event));
3344         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
3345         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
3346         event.tx_status.dst = hdr->addr1;
3347         event.tx_status.data = buf;
3348         event.tx_status.data_len = len;
3349         event.tx_status.ack = ok;
3350         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
3351 }
3352
3353
3354 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
3355                              u8 *buf, size_t len)
3356 {
3357         union wpa_event_data event;
3358         os_memset(&event, 0, sizeof(event));
3359         event.rx_from_unknown.frame = buf;
3360         event.rx_from_unknown.len = len;
3361         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
3362 }
3363
3364
3365 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3366                          u8 *buf, size_t len, int datarate, int ssi_signal)
3367 {
3368         struct ieee80211_hdr *hdr;
3369         u16 fc;
3370         union wpa_event_data event;
3371
3372         hdr = (struct ieee80211_hdr *) buf;
3373         fc = le_to_host16(hdr->frame_control);
3374
3375         switch (WLAN_FC_GET_TYPE(fc)) {
3376         case WLAN_FC_TYPE_MGMT:
3377                 os_memset(&event, 0, sizeof(event));
3378                 event.rx_mgmt.frame = buf;
3379                 event.rx_mgmt.frame_len = len;
3380                 event.rx_mgmt.datarate = datarate;
3381                 event.rx_mgmt.ssi_signal = ssi_signal;
3382                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3383                 break;
3384         case WLAN_FC_TYPE_CTRL:
3385                 /* can only get here with PS-Poll frames */
3386                 wpa_printf(MSG_DEBUG, "CTRL");
3387                 from_unknown_sta(drv, buf, len);
3388                 break;
3389         case WLAN_FC_TYPE_DATA:
3390                 from_unknown_sta(drv, buf, len);
3391                 break;
3392         }
3393 }
3394
3395
3396 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3397 {
3398         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3399         int len;
3400         unsigned char buf[3000];
3401         struct ieee80211_radiotap_iterator iter;
3402         int ret;
3403         int datarate = 0, ssi_signal = 0;
3404         int injected = 0, failed = 0, rxflags = 0;
3405
3406         len = recv(sock, buf, sizeof(buf), 0);
3407         if (len < 0) {
3408                 perror("recv");
3409                 return;
3410         }
3411
3412         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3413                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3414                            "frame since Probe Request reporting is disabled");
3415                 return;
3416         }
3417
3418         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3419                 printf("received invalid radiotap frame\n");
3420                 return;
3421         }
3422
3423         while (1) {
3424                 ret = ieee80211_radiotap_iterator_next(&iter);
3425                 if (ret == -ENOENT)
3426                         break;
3427                 if (ret) {
3428                         printf("received invalid radiotap frame (%d)\n", ret);
3429                         return;
3430                 }
3431                 switch (iter.this_arg_index) {
3432                 case IEEE80211_RADIOTAP_FLAGS:
3433                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3434                                 len -= 4;
3435                         break;
3436                 case IEEE80211_RADIOTAP_RX_FLAGS:
3437                         rxflags = 1;
3438                         break;
3439                 case IEEE80211_RADIOTAP_TX_FLAGS:
3440                         injected = 1;
3441                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3442                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3443                         break;
3444                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3445                         break;
3446                 case IEEE80211_RADIOTAP_CHANNEL:
3447                         /* TODO: convert from freq/flags to channel number */
3448                         break;
3449                 case IEEE80211_RADIOTAP_RATE:
3450                         datarate = *iter.this_arg * 5;
3451                         break;
3452                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3453                         ssi_signal = *iter.this_arg;
3454                         break;
3455                 }
3456         }
3457
3458         if (rxflags && injected)
3459                 return;
3460
3461         if (!injected)
3462                 handle_frame(drv, buf + iter.max_length,
3463                              len - iter.max_length, datarate, ssi_signal);
3464         else
3465                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3466                                    len - iter.max_length, !failed);
3467 }
3468
3469
3470 /*
3471  * we post-process the filter code later and rewrite
3472  * this to the offset to the last instruction
3473  */
3474 #define PASS    0xFF
3475 #define FAIL    0xFE
3476
3477 static struct sock_filter msock_filter_insns[] = {
3478         /*
3479          * do a little-endian load of the radiotap length field
3480          */
3481         /* load lower byte into A */
3482         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3483         /* put it into X (== index register) */
3484         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3485         /* load upper byte into A */
3486         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3487         /* left-shift it by 8 */
3488         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3489         /* or with X */
3490         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3491         /* put result into X */
3492         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3493
3494         /*
3495          * Allow management frames through, this also gives us those
3496          * management frames that we sent ourselves with status
3497          */
3498         /* load the lower byte of the IEEE 802.11 frame control field */
3499         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3500         /* mask off frame type and version */
3501         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3502         /* accept frame if it's both 0, fall through otherwise */
3503         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3504
3505         /*
3506          * TODO: add a bit to radiotap RX flags that indicates
3507          * that the sending station is not associated, then
3508          * add a filter here that filters on our DA and that flag
3509          * to allow us to deauth frames to that bad station.
3510          *
3511          * Not a regression -- we didn't do it before either.
3512          */
3513
3514 #if 0
3515         /*
3516          * drop non-data frames
3517          */
3518         /* load the lower byte of the frame control field */
3519         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3520         /* mask off QoS bit */
3521         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3522         /* drop non-data frames */
3523         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3524 #endif
3525         /* load the upper byte of the frame control field */
3526         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3527         /* mask off toDS/fromDS */
3528         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3529         /* accept WDS frames */
3530         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3531
3532         /*
3533          * add header length to index
3534          */
3535         /* load the lower byte of the frame control field */
3536         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3537         /* mask off QoS bit */
3538         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3539         /* right shift it by 6 to give 0 or 2 */
3540         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3541         /* add data frame header length */
3542         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3543         /* add index, was start of 802.11 header */
3544         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3545         /* move to index, now start of LL header */
3546         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3547
3548         /*
3549          * Accept empty data frames, we use those for
3550          * polling activity.
3551          */
3552         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3553         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3554
3555         /*
3556          * Accept EAPOL frames
3557          */
3558         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3559         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3560         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3561         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3562
3563         /* keep these last two statements or change the code below */
3564         /* return 0 == "DROP" */
3565         BPF_STMT(BPF_RET | BPF_K, 0),
3566         /* return ~0 == "keep all" */
3567         BPF_STMT(BPF_RET | BPF_K, ~0),
3568 };
3569
3570 static struct sock_fprog msock_filter = {
3571         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3572         .filter = msock_filter_insns,
3573 };
3574
3575
3576 static int add_monitor_filter(int s)
3577 {
3578         int idx;
3579
3580         /* rewrite all PASS/FAIL jump offsets */
3581         for (idx = 0; idx < msock_filter.len; idx++) {
3582                 struct sock_filter *insn = &msock_filter_insns[idx];
3583
3584                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3585                         if (insn->code == (BPF_JMP|BPF_JA)) {
3586                                 if (insn->k == PASS)
3587                                         insn->k = msock_filter.len - idx - 2;
3588                                 else if (insn->k == FAIL)
3589                                         insn->k = msock_filter.len - idx - 3;
3590                         }
3591
3592                         if (insn->jt == PASS)
3593                                 insn->jt = msock_filter.len - idx - 2;
3594                         else if (insn->jt == FAIL)
3595                                 insn->jt = msock_filter.len - idx - 3;
3596
3597                         if (insn->jf == PASS)
3598                                 insn->jf = msock_filter.len - idx - 2;
3599                         else if (insn->jf == FAIL)
3600                                 insn->jf = msock_filter.len - idx - 3;
3601                 }
3602         }
3603
3604         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3605                        &msock_filter, sizeof(msock_filter))) {
3606                 perror("SO_ATTACH_FILTER");
3607                 return -1;
3608         }
3609
3610         return 0;
3611 }
3612
3613
3614 static void nl80211_remove_monitor_interface(
3615         struct wpa_driver_nl80211_data *drv)
3616 {
3617         if (drv->monitor_ifidx >= 0) {
3618                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3619                 drv->monitor_ifidx = -1;
3620         }
3621         if (drv->monitor_sock >= 0) {
3622                 eloop_unregister_read_sock(drv->monitor_sock);
3623                 close(drv->monitor_sock);
3624                 drv->monitor_sock = -1;
3625         }
3626 }
3627
3628
3629 static int
3630 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3631 {
3632         char buf[IFNAMSIZ];
3633         struct sockaddr_ll ll;
3634         int optval;
3635         socklen_t optlen;
3636
3637         snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
3638         buf[IFNAMSIZ - 1] = '\0';
3639
3640         drv->monitor_ifidx =
3641                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3642                                      0);
3643
3644         if (drv->monitor_ifidx < 0)
3645                 return -1;
3646
3647         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3648                 goto error;
3649
3650         memset(&ll, 0, sizeof(ll));
3651         ll.sll_family = AF_PACKET;
3652         ll.sll_ifindex = drv->monitor_ifidx;
3653         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3654         if (drv->monitor_sock < 0) {
3655                 perror("socket[PF_PACKET,SOCK_RAW]");
3656                 goto error;
3657         }
3658
3659         if (add_monitor_filter(drv->monitor_sock)) {
3660                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3661                            "interface; do filtering in user space");
3662                 /* This works, but will cost in performance. */
3663         }
3664
3665         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3666                 perror("monitor socket bind");
3667                 goto error;
3668         }
3669
3670         optlen = sizeof(optval);
3671         optval = 20;
3672         if (setsockopt
3673             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3674                 perror("Failed to set socket priority");
3675                 goto error;
3676         }
3677
3678         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3679                                      drv, NULL)) {
3680                 printf("Could not register monitor read socket\n");
3681                 goto error;
3682         }
3683
3684         return 0;
3685  error:
3686         nl80211_remove_monitor_interface(drv);
3687         return -1;
3688 }
3689
3690
3691 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3692
3693 static int wpa_driver_nl80211_hapd_send_eapol(
3694         void *priv, const u8 *addr, const u8 *data,
3695         size_t data_len, int encrypt, const u8 *own_addr)
3696 {
3697         struct i802_bss *bss = priv;
3698         struct wpa_driver_nl80211_data *drv = bss->drv;
3699         struct ieee80211_hdr *hdr;
3700         size_t len;
3701         u8 *pos;
3702         int res;
3703 #if 0 /* FIX */
3704         int qos = sta->flags & WPA_STA_WMM;
3705 #else
3706         int qos = 0;
3707 #endif
3708
3709         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3710                 data_len;
3711         hdr = os_zalloc(len);
3712         if (hdr == NULL) {
3713                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3714                        (unsigned long) len);
3715                 return -1;
3716         }
3717
3718         hdr->frame_control =
3719                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3720         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3721         if (encrypt)
3722                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3723 #if 0 /* To be enabled if qos determination is added above */
3724         if (qos) {
3725                 hdr->frame_control |=
3726                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3727         }
3728 #endif
3729
3730         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3731         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3732         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3733         pos = (u8 *) (hdr + 1);
3734
3735 #if 0 /* To be enabled if qos determination is added above */
3736         if (qos) {
3737                 /* add an empty QoS header if needed */
3738                 pos[0] = 0;
3739                 pos[1] = 0;
3740                 pos += 2;
3741         }
3742 #endif
3743
3744         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3745         pos += sizeof(rfc1042_header);
3746         WPA_PUT_BE16(pos, ETH_P_PAE);
3747         pos += 2;
3748         memcpy(pos, data, data_len);
3749
3750         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3751         if (res < 0) {
3752                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3753                            "failed: %d (%s)",
3754                            (unsigned long) len, errno, strerror(errno));
3755         }
3756         os_free(hdr);
3757
3758         return res;
3759 }
3760
3761
3762 static u32 sta_flags_nl80211(int flags)
3763 {
3764         u32 f = 0;
3765
3766         if (flags & WPA_STA_AUTHORIZED)
3767                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3768         if (flags & WPA_STA_WMM)
3769                 f |= BIT(NL80211_STA_FLAG_WME);
3770         if (flags & WPA_STA_SHORT_PREAMBLE)
3771                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3772         if (flags & WPA_STA_MFP)
3773                 f |= BIT(NL80211_STA_FLAG_MFP);
3774
3775         return f;
3776 }
3777
3778
3779 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3780                                             int total_flags,
3781                                             int flags_or, int flags_and)
3782 {
3783         struct i802_bss *bss = priv;
3784         struct wpa_driver_nl80211_data *drv = bss->drv;
3785         struct nl_msg *msg, *flags = NULL;
3786         struct nl80211_sta_flag_update upd;
3787
3788         msg = nlmsg_alloc();
3789         if (!msg)
3790                 return -ENOMEM;
3791
3792         flags = nlmsg_alloc();
3793         if (!flags) {
3794                 nlmsg_free(msg);
3795                 return -ENOMEM;
3796         }
3797
3798         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3799                     0, NL80211_CMD_SET_STATION, 0);
3800
3801         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3802                     if_nametoindex(bss->ifname));
3803         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3804
3805         /*
3806          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3807          * can be removed eventually.
3808          */
3809         if (total_flags & WPA_STA_AUTHORIZED)
3810                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3811
3812         if (total_flags & WPA_STA_WMM)
3813                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3814
3815         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3816                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3817
3818         if (total_flags & WPA_STA_MFP)
3819                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3820
3821         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3822                 goto nla_put_failure;
3823
3824         os_memset(&upd, 0, sizeof(upd));
3825         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3826         upd.set = sta_flags_nl80211(flags_or);
3827         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3828
3829         nlmsg_free(flags);
3830
3831         return send_and_recv_msgs(drv, msg, NULL, NULL);
3832  nla_put_failure:
3833         nlmsg_free(flags);
3834         return -ENOBUFS;
3835 }
3836
3837
3838 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3839                                  struct wpa_driver_associate_params *params)
3840 {
3841         if (params->p2p)
3842                 wpa_printf(MSG_DEBUG, "nl80211: Setup AP operations for P2P "
3843                            "group (GO)");
3844         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
3845             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3846                 nl80211_remove_monitor_interface(drv);
3847                 return -1;
3848         }
3849
3850         /* TODO: setup monitor interface (and add code somewhere to remove this
3851          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3852
3853         return 0;
3854 }
3855
3856
3857 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3858 {
3859         struct nl_msg *msg;
3860         int ret = -1;
3861
3862         msg = nlmsg_alloc();
3863         if (!msg)
3864                 return -1;
3865
3866         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3867                     NL80211_CMD_LEAVE_IBSS, 0);
3868         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3869         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3870         msg = NULL;
3871         if (ret) {
3872                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3873                            "(%s)", ret, strerror(-ret));
3874                 goto nla_put_failure;
3875         }
3876
3877         ret = 0;
3878         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3879
3880 nla_put_failure:
3881         nlmsg_free(msg);
3882         return ret;
3883 }
3884
3885
3886 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3887                                    struct wpa_driver_associate_params *params)
3888 {
3889         struct nl_msg *msg;
3890         int ret = -1;
3891         int count = 0;
3892
3893         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3894
3895         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
3896                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3897                            "IBSS mode");
3898                 return -1;
3899         }
3900
3901 retry:
3902         msg = nlmsg_alloc();
3903         if (!msg)
3904                 return -1;
3905
3906         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3907                     NL80211_CMD_JOIN_IBSS, 0);
3908         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3909
3910         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3911                 goto nla_put_failure;
3912
3913         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3914                           params->ssid, params->ssid_len);
3915         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3916                 params->ssid);
3917         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3918         drv->ssid_len = params->ssid_len;
3919
3920         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3921         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3922
3923         ret = nl80211_set_conn_keys(params, msg);
3924         if (ret)
3925                 goto nla_put_failure;
3926
3927         if (params->wpa_ie) {
3928                 wpa_hexdump(MSG_DEBUG,
3929                             "  * Extra IEs for Beacon/Probe Response frames",
3930                             params->wpa_ie, params->wpa_ie_len);
3931                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3932                         params->wpa_ie);
3933         }
3934
3935         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3936         msg = NULL;
3937         if (ret) {
3938                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3939                            ret, strerror(-ret));
3940                 count++;
3941                 if (ret == -EALREADY && count == 1) {
3942                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3943                                    "forced leave");
3944                         nl80211_leave_ibss(drv);
3945                         nlmsg_free(msg);
3946                         goto retry;
3947                 }
3948
3949                 goto nla_put_failure;
3950         }
3951         ret = 0;
3952         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3953
3954 nla_put_failure:
3955         nlmsg_free(msg);
3956         return ret;
3957 }
3958
3959
3960 static int wpa_driver_nl80211_connect(
3961         struct wpa_driver_nl80211_data *drv,
3962         struct wpa_driver_associate_params *params)
3963 {
3964         struct nl_msg *msg;
3965         enum nl80211_auth_type type;
3966         int ret = 0;
3967
3968         msg = nlmsg_alloc();
3969         if (!msg)
3970                 return -1;
3971
3972         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3973         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3974                     NL80211_CMD_CONNECT, 0);
3975
3976         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3977         if (params->bssid) {
3978                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3979                            MAC2STR(params->bssid));
3980                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3981         }
3982         if (params->freq) {
3983                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3984                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3985         }
3986         if (params->ssid) {
3987                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3988                                   params->ssid, params->ssid_len);
3989                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3990                         params->ssid);
3991                 if (params->ssid_len > sizeof(drv->ssid))
3992                         goto nla_put_failure;
3993                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3994                 drv->ssid_len = params->ssid_len;
3995         }
3996         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3997         if (params->wpa_ie)
3998                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3999                         params->wpa_ie);
4000
4001         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
4002                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
4003         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
4004                 type = NL80211_AUTHTYPE_SHARED_KEY;
4005         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
4006                 type = NL80211_AUTHTYPE_NETWORK_EAP;
4007         else if (params->auth_alg & WPA_AUTH_ALG_FT)
4008                 type = NL80211_AUTHTYPE_FT;
4009         else
4010                 goto nla_put_failure;
4011
4012         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
4013         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
4014
4015         if (params->wpa_ie && params->wpa_ie_len) {
4016                 enum nl80211_wpa_versions ver;
4017
4018                 if (params->wpa_ie[0] == WLAN_EID_RSN)
4019                         ver = NL80211_WPA_VERSION_2;
4020                 else
4021                         ver = NL80211_WPA_VERSION_1;
4022
4023                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
4024                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
4025         }
4026
4027         if (params->pairwise_suite != CIPHER_NONE) {
4028                 int cipher;
4029
4030                 switch (params->pairwise_suite) {
4031                 case CIPHER_WEP40:
4032                         cipher = WLAN_CIPHER_SUITE_WEP40;
4033                         break;
4034                 case CIPHER_WEP104:
4035                         cipher = WLAN_CIPHER_SUITE_WEP104;
4036                         break;
4037                 case CIPHER_CCMP:
4038                         cipher = WLAN_CIPHER_SUITE_CCMP;
4039                         break;
4040                 case CIPHER_TKIP:
4041                 default:
4042                         cipher = WLAN_CIPHER_SUITE_TKIP;
4043                         break;
4044                 }
4045                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
4046         }
4047
4048         if (params->group_suite != CIPHER_NONE) {
4049                 int cipher;
4050
4051                 switch (params->group_suite) {
4052                 case CIPHER_WEP40:
4053                         cipher = WLAN_CIPHER_SUITE_WEP40;
4054                         break;
4055                 case CIPHER_WEP104:
4056                         cipher = WLAN_CIPHER_SUITE_WEP104;
4057                         break;
4058                 case CIPHER_CCMP:
4059                         cipher = WLAN_CIPHER_SUITE_CCMP;
4060                         break;
4061                 case CIPHER_TKIP:
4062                 default:
4063                         cipher = WLAN_CIPHER_SUITE_TKIP;
4064                         break;
4065                 }
4066                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
4067         }
4068
4069         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
4070             params->key_mgmt_suite == KEY_MGMT_PSK) {
4071                 int mgmt = WLAN_AKM_SUITE_PSK;
4072
4073                 switch (params->key_mgmt_suite) {
4074                 case KEY_MGMT_802_1X:
4075                         mgmt = WLAN_AKM_SUITE_8021X;
4076                         break;
4077                 case KEY_MGMT_PSK:
4078                 default:
4079                         mgmt = WLAN_AKM_SUITE_PSK;
4080                         break;
4081                 }
4082                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
4083         }
4084
4085         ret = nl80211_set_conn_keys(params, msg);
4086         if (ret)
4087                 goto nla_put_failure;
4088
4089         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4090         msg = NULL;
4091         if (ret) {
4092                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
4093                            "(%s)", ret, strerror(-ret));
4094                 goto nla_put_failure;
4095         }
4096         ret = 0;
4097         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
4098
4099 nla_put_failure:
4100         nlmsg_free(msg);
4101         return ret;
4102
4103 }
4104
4105
4106 static int wpa_driver_nl80211_associate(
4107         void *priv, struct wpa_driver_associate_params *params)
4108 {
4109         struct i802_bss *bss = priv;
4110         struct wpa_driver_nl80211_data *drv = bss->drv;
4111         int ret = -1;
4112         struct nl_msg *msg;
4113
4114         if (params->mode == IEEE80211_MODE_AP)
4115                 return wpa_driver_nl80211_ap(drv, params);
4116
4117         if (params->mode == IEEE80211_MODE_IBSS)
4118                 return wpa_driver_nl80211_ibss(drv, params);
4119
4120         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
4121                 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
4122                         return -1;
4123                 return wpa_driver_nl80211_connect(drv, params);
4124         }
4125
4126         drv->associated = 0;
4127
4128         msg = nlmsg_alloc();
4129         if (!msg)
4130                 return -1;
4131
4132         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
4133                    drv->ifindex);
4134         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4135                     NL80211_CMD_ASSOCIATE, 0);
4136
4137         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4138         if (params->bssid) {
4139                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
4140                            MAC2STR(params->bssid));
4141                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
4142         }
4143         if (params->freq) {
4144                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
4145                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
4146                 drv->assoc_freq = params->freq;
4147         } else
4148                 drv->assoc_freq = 0;
4149         if (params->ssid) {
4150                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
4151                                   params->ssid, params->ssid_len);
4152                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
4153                         params->ssid);
4154                 if (params->ssid_len > sizeof(drv->ssid))
4155                         goto nla_put_failure;
4156                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
4157                 drv->ssid_len = params->ssid_len;
4158         }
4159         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
4160         if (params->wpa_ie)
4161                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
4162                         params->wpa_ie);
4163
4164 #ifdef CONFIG_IEEE80211W
4165         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
4166                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
4167 #endif /* CONFIG_IEEE80211W */
4168
4169         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
4170
4171         if (params->prev_bssid) {
4172                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
4173                            MAC2STR(params->prev_bssid));
4174                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
4175                         params->prev_bssid);
4176         }
4177
4178         if (params->p2p)
4179                 wpa_printf(MSG_DEBUG, "  * P2P group");
4180
4181         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4182         msg = NULL;
4183         if (ret) {
4184                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
4185                            "(%s)", ret, strerror(-ret));
4186                 nl80211_dump_scan(drv);
4187                 goto nla_put_failure;
4188         }
4189         ret = 0;
4190         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
4191                    "successfully");
4192
4193 nla_put_failure:
4194         nlmsg_free(msg);
4195         return ret;
4196 }
4197
4198
4199 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
4200                             int ifindex, int mode)
4201 {
4202         struct nl_msg *msg;
4203         int ret = -ENOBUFS;
4204
4205         msg = nlmsg_alloc();
4206         if (!msg)
4207                 return -ENOMEM;
4208
4209         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4210                     0, NL80211_CMD_SET_INTERFACE, 0);
4211         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4212         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
4213
4214         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4215         if (!ret)
4216                 return 0;
4217 nla_put_failure:
4218         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
4219                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
4220         return ret;
4221 }
4222
4223
4224 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
4225 {
4226         struct i802_bss *bss = priv;
4227         struct wpa_driver_nl80211_data *drv = bss->drv;
4228         int ret = -1;
4229         int nlmode;
4230         int i;
4231
4232         switch (mode) {
4233         case 0:
4234                 nlmode = NL80211_IFTYPE_STATION;
4235                 break;
4236         case 1:
4237                 nlmode = NL80211_IFTYPE_ADHOC;
4238                 break;
4239         case 2:
4240                 nlmode = NL80211_IFTYPE_AP;
4241                 break;
4242         default:
4243                 return -1;
4244         }
4245
4246         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
4247                 drv->nlmode = nlmode;
4248                 ret = 0;
4249                 goto done;
4250         }
4251
4252         if (nlmode == drv->nlmode) {
4253                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
4254                            "requested mode - ignore error");
4255                 ret = 0;
4256                 goto done; /* Already in the requested mode */
4257         }
4258
4259         /* mac80211 doesn't allow mode changes while the device is up, so
4260          * take the device down, try to set the mode again, and bring the
4261          * device back up.
4262          */
4263         wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
4264                    "interface down");
4265         for (i = 0; i < 10; i++) {
4266                 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) ==
4267                     0) {
4268                         /* Try to set the mode again while the interface is
4269                          * down */
4270                         ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
4271                         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname,
4272                                                   1))
4273                                 ret = -1;
4274                         if (!ret)
4275                                 break;
4276                 } else
4277                         wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
4278                                    "interface down");
4279                 os_sleep(0, 100000);
4280         }
4281
4282         if (!ret) {
4283                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
4284                            "interface is down");
4285                 drv->nlmode = nlmode;
4286         }
4287
4288 done:
4289         if (!ret && nlmode == NL80211_IFTYPE_AP) {
4290                 /* Setup additional AP mode functionality if needed */
4291                 if (drv->monitor_ifidx < 0 &&
4292                     nl80211_create_monitor_interface(drv))
4293                         return -1;
4294         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
4295                 /* Remove additional AP mode functionality */
4296                 nl80211_remove_monitor_interface(drv);
4297                 bss->beacon_set = 0;
4298         }
4299
4300         if (ret)
4301                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
4302                            "from %d failed", nlmode, drv->nlmode);
4303
4304         return ret;
4305 }
4306
4307
4308 static int wpa_driver_nl80211_get_capa(void *priv,
4309                                        struct wpa_driver_capa *capa)
4310 {
4311         struct i802_bss *bss = priv;
4312         struct wpa_driver_nl80211_data *drv = bss->drv;
4313         if (!drv->has_capability)
4314                 return -1;
4315         os_memcpy(capa, &drv->capa, sizeof(*capa));
4316         return 0;
4317 }
4318
4319
4320 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
4321 {
4322         struct i802_bss *bss = priv;
4323         struct wpa_driver_nl80211_data *drv = bss->drv;
4324
4325         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
4326                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
4327         drv->operstate = state;
4328         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
4329                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
4330 }
4331
4332
4333 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
4334 {
4335         struct i802_bss *bss = priv;
4336         struct wpa_driver_nl80211_data *drv = bss->drv;
4337         struct nl_msg *msg;
4338         struct nl80211_sta_flag_update upd;
4339
4340         msg = nlmsg_alloc();
4341         if (!msg)
4342                 return -ENOMEM;
4343
4344         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4345                     0, NL80211_CMD_SET_STATION, 0);
4346
4347         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4348                     if_nametoindex(bss->ifname));
4349         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
4350
4351         os_memset(&upd, 0, sizeof(upd));
4352         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
4353         if (authorized)
4354                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
4355         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4356
4357         return send_and_recv_msgs(drv, msg, NULL, NULL);
4358  nla_put_failure:
4359         return -ENOBUFS;
4360 }
4361
4362
4363 #ifdef HOSTAPD
4364
4365 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4366 {
4367         int i;
4368         int *old;
4369
4370         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
4371                    ifidx);
4372         for (i = 0; i < drv->num_if_indices; i++) {
4373                 if (drv->if_indices[i] == 0) {
4374                         drv->if_indices[i] = ifidx;
4375                         return;
4376                 }
4377         }
4378
4379         if (drv->if_indices != drv->default_if_indices)
4380                 old = drv->if_indices;
4381         else
4382                 old = NULL;
4383
4384         drv->if_indices = os_realloc(old,
4385                                      sizeof(int) * (drv->num_if_indices + 1));
4386         if (!drv->if_indices) {
4387                 if (!old)
4388                         drv->if_indices = drv->default_if_indices;
4389                 else
4390                         drv->if_indices = old;
4391                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4392                            "interfaces");
4393                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4394                 return;
4395         } else if (!old)
4396                 os_memcpy(drv->if_indices, drv->default_if_indices,
4397                           sizeof(drv->default_if_indices));
4398         drv->if_indices[drv->num_if_indices] = ifidx;
4399         drv->num_if_indices++;
4400 }
4401
4402
4403 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4404 {
4405         int i;
4406
4407         for (i = 0; i < drv->num_if_indices; i++) {
4408                 if (drv->if_indices[i] == ifidx) {
4409                         drv->if_indices[i] = 0;
4410                         break;
4411                 }
4412         }
4413 }
4414
4415
4416 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4417 {
4418         int i;
4419
4420         for (i = 0; i < drv->num_if_indices; i++)
4421                 if (drv->if_indices[i] == ifidx)
4422                         return 1;
4423
4424         return 0;
4425 }
4426
4427
4428 static inline int min_int(int a, int b)
4429 {
4430         if (a < b)
4431                 return a;
4432         return b;
4433 }
4434
4435
4436 static int get_key_handler(struct nl_msg *msg, void *arg)
4437 {
4438         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4439         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4440
4441         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4442                   genlmsg_attrlen(gnlh, 0), NULL);
4443
4444         /*
4445          * TODO: validate the key index and mac address!
4446          * Otherwise, there's a race condition as soon as
4447          * the kernel starts sending key notifications.
4448          */
4449
4450         if (tb[NL80211_ATTR_KEY_SEQ])
4451                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4452                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4453         return NL_SKIP;
4454 }
4455
4456
4457 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4458                            int idx, u8 *seq)
4459 {
4460         struct i802_bss *bss = priv;
4461         struct wpa_driver_nl80211_data *drv = bss->drv;
4462         struct nl_msg *msg;
4463
4464         msg = nlmsg_alloc();
4465         if (!msg)
4466                 return -ENOMEM;
4467
4468         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4469                     0, NL80211_CMD_GET_KEY, 0);
4470
4471         if (addr)
4472                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4473         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4474         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4475
4476         memset(seq, 0, 6);
4477
4478         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4479  nla_put_failure:
4480         return -ENOBUFS;
4481 }
4482
4483
4484 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4485                               int mode)
4486 {
4487         struct i802_bss *bss = priv;
4488         struct wpa_driver_nl80211_data *drv = bss->drv;
4489         struct nl_msg *msg;
4490         u8 rates[NL80211_MAX_SUPP_RATES];
4491         u8 rates_len = 0;
4492         int i;
4493
4494         msg = nlmsg_alloc();
4495         if (!msg)
4496                 return -ENOMEM;
4497
4498         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4499                     NL80211_CMD_SET_BSS, 0);
4500
4501         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4502                 rates[rates_len++] = basic_rates[i] / 5;
4503
4504         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4505
4506         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4507
4508         return send_and_recv_msgs(drv, msg, NULL, NULL);
4509  nla_put_failure:
4510         return -ENOBUFS;
4511 }
4512
4513 #endif /* HOSTAPD */
4514
4515
4516 /* Set kernel driver on given frequency (MHz) */
4517 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4518 {
4519         struct i802_bss *bss = priv;
4520         struct wpa_driver_nl80211_data *drv = bss->drv;
4521         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4522                                            freq->sec_channel_offset);
4523 }
4524
4525
4526 #ifdef HOSTAPD
4527
4528 static int i802_set_rts(void *priv, int rts)
4529 {
4530         struct i802_bss *bss = priv;
4531         struct wpa_driver_nl80211_data *drv = bss->drv;
4532         struct nl_msg *msg;
4533         int ret = -ENOBUFS;
4534         u32 val;
4535
4536         msg = nlmsg_alloc();
4537         if (!msg)
4538                 return -ENOMEM;
4539
4540         if (rts >= 2347)
4541                 val = (u32) -1;
4542         else
4543                 val = rts;
4544
4545         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4546                     0, NL80211_CMD_SET_WIPHY, 0);
4547         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4548         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4549
4550         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4551         if (!ret)
4552                 return 0;
4553 nla_put_failure:
4554         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4555                    "%d (%s)", rts, ret, strerror(-ret));
4556         return ret;
4557 }
4558
4559
4560 static int i802_set_frag(void *priv, int frag)
4561 {
4562         struct i802_bss *bss = priv;
4563         struct wpa_driver_nl80211_data *drv = bss->drv;
4564         struct nl_msg *msg;
4565         int ret = -ENOBUFS;
4566         u32 val;
4567
4568         msg = nlmsg_alloc();
4569         if (!msg)
4570                 return -ENOMEM;
4571
4572         if (frag >= 2346)
4573                 val = (u32) -1;
4574         else
4575                 val = frag;
4576
4577         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4578                     0, NL80211_CMD_SET_WIPHY, 0);
4579         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4580         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4581
4582         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4583         if (!ret)
4584                 return 0;
4585 nla_put_failure:
4586         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4587                    "%d: %d (%s)", frag, ret, strerror(-ret));
4588         return ret;
4589 }
4590
4591
4592 static int i802_flush(void *priv)
4593 {
4594         struct i802_bss *bss = priv;
4595         struct wpa_driver_nl80211_data *drv = bss->drv;
4596         struct nl_msg *msg;
4597
4598         msg = nlmsg_alloc();
4599         if (!msg)
4600                 return -1;
4601
4602         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4603                     0, NL80211_CMD_DEL_STATION, 0);
4604
4605         /*
4606          * XXX: FIX! this needs to flush all VLANs too
4607          */
4608         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4609                     if_nametoindex(bss->ifname));
4610
4611         return send_and_recv_msgs(drv, msg, NULL, NULL);
4612  nla_put_failure:
4613         return -ENOBUFS;
4614 }
4615
4616
4617 static int get_sta_handler(struct nl_msg *msg, void *arg)
4618 {
4619         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4620         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4621         struct hostap_sta_driver_data *data = arg;
4622         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4623         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4624                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4625                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4626                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4627                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4628                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4629         };
4630
4631         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4632                   genlmsg_attrlen(gnlh, 0), NULL);
4633
4634         /*
4635          * TODO: validate the interface and mac address!
4636          * Otherwise, there's a race condition as soon as
4637          * the kernel starts sending station notifications.
4638          */
4639
4640         if (!tb[NL80211_ATTR_STA_INFO]) {
4641                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4642                 return NL_SKIP;
4643         }
4644         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4645                              tb[NL80211_ATTR_STA_INFO],
4646                              stats_policy)) {
4647                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4648                 return NL_SKIP;
4649         }
4650
4651         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4652                 data->inactive_msec =
4653                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4654         if (stats[NL80211_STA_INFO_RX_BYTES])
4655                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4656         if (stats[NL80211_STA_INFO_TX_BYTES])
4657                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4658         if (stats[NL80211_STA_INFO_RX_PACKETS])
4659                 data->rx_packets =
4660                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4661         if (stats[NL80211_STA_INFO_TX_PACKETS])
4662                 data->tx_packets =
4663                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4664
4665         return NL_SKIP;
4666 }
4667
4668 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4669                               const u8 *addr)
4670 {
4671         struct i802_bss *bss = priv;
4672         struct wpa_driver_nl80211_data *drv = bss->drv;
4673         struct nl_msg *msg;
4674
4675         os_memset(data, 0, sizeof(*data));
4676         msg = nlmsg_alloc();
4677         if (!msg)
4678                 return -ENOMEM;
4679
4680         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4681                     0, NL80211_CMD_GET_STATION, 0);
4682
4683         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4684         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4685
4686         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4687  nla_put_failure:
4688         return -ENOBUFS;
4689 }
4690
4691
4692 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4693                                     int cw_min, int cw_max, int burst_time)
4694 {
4695         struct i802_bss *bss = priv;
4696         struct wpa_driver_nl80211_data *drv = bss->drv;
4697         struct nl_msg *msg;
4698         struct nlattr *txq, *params;
4699
4700         msg = nlmsg_alloc();
4701         if (!msg)
4702                 return -1;
4703
4704         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4705                     0, NL80211_CMD_SET_WIPHY, 0);
4706
4707         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4708
4709         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4710         if (!txq)
4711                 goto nla_put_failure;
4712
4713         /* We are only sending parameters for a single TXQ at a time */
4714         params = nla_nest_start(msg, 1);
4715         if (!params)
4716                 goto nla_put_failure;
4717
4718         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4719         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4720          * 32 usec, so need to convert the value here. */
4721         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4722         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4723         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4724         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4725
4726         nla_nest_end(msg, params);
4727
4728         nla_nest_end(msg, txq);
4729
4730         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4731                 return 0;
4732  nla_put_failure:
4733         return -1;
4734 }
4735
4736
4737 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4738 {
4739         struct i802_bss *bss = priv;
4740         struct wpa_driver_nl80211_data *drv = bss->drv;
4741         struct nl_msg *msg;
4742
4743         msg = nlmsg_alloc();
4744         if (!msg)
4745                 return -ENOMEM;
4746
4747         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4748                     NL80211_CMD_SET_BSS, 0);
4749
4750         if (cts >= 0)
4751                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4752         if (preamble >= 0)
4753                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4754         if (slot >= 0)
4755                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4756
4757         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4758
4759         return send_and_recv_msgs(drv, msg, NULL, NULL);
4760  nla_put_failure:
4761         return -ENOBUFS;
4762 }
4763
4764
4765 static int i802_set_cts_protect(void *priv, int value)
4766 {
4767         return i802_set_bss(priv, value, -1, -1);
4768 }
4769
4770
4771 static int i802_set_preamble(void *priv, int value)
4772 {
4773         return i802_set_bss(priv, -1, value, -1);
4774 }
4775
4776
4777 static int i802_set_short_slot_time(void *priv, int value)
4778 {
4779         return i802_set_bss(priv, -1, -1, value);
4780 }
4781
4782
4783 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4784                              const char *ifname, int vlan_id)
4785 {
4786         struct i802_bss *bss = priv;
4787         struct wpa_driver_nl80211_data *drv = bss->drv;
4788         struct nl_msg *msg;
4789         int ret = -ENOBUFS;
4790
4791         msg = nlmsg_alloc();
4792         if (!msg)
4793                 return -ENOMEM;
4794
4795         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4796                     0, NL80211_CMD_SET_STATION, 0);
4797
4798         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4799                     if_nametoindex(bss->ifname));
4800         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4801         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4802                     if_nametoindex(ifname));
4803
4804         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4805         if (ret < 0) {
4806                 wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
4807                            MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
4808                            MAC2STR(addr), ifname, vlan_id, ret,
4809                            strerror(-ret));
4810         }
4811  nla_put_failure:
4812         return ret;
4813 }
4814
4815
4816 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4817 {
4818         struct i802_bss *bss = priv;
4819         struct wpa_driver_nl80211_data *drv = bss->drv;
4820         char name[IFNAMSIZ + 1];
4821
4822         os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
4823         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4824                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4825         if (val) {
4826                 if (nl80211_create_iface(drv, name, NL80211_IFTYPE_AP_VLAN,
4827                                          NULL, 1) < 0)
4828                         return -1;
4829                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4830                 return i802_set_sta_vlan(priv, addr, name, 0);
4831         } else {
4832                 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
4833                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4834                                                     name);
4835         }
4836 }
4837
4838
4839 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4840 {
4841         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4842         struct sockaddr_ll lladdr;
4843         unsigned char buf[3000];
4844         int len;
4845         socklen_t fromlen = sizeof(lladdr);
4846
4847         len = recvfrom(sock, buf, sizeof(buf), 0,
4848                        (struct sockaddr *)&lladdr, &fromlen);
4849         if (len < 0) {
4850                 perror("recv");
4851                 return;
4852         }
4853
4854         if (have_ifidx(drv, lladdr.sll_ifindex))
4855                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4856 }
4857
4858
4859 static int i802_get_inact_sec(void *priv, const u8 *addr)
4860 {
4861         struct hostap_sta_driver_data data;
4862         int ret;
4863
4864         data.inactive_msec = (unsigned long) -1;
4865         ret = i802_read_sta_data(priv, &data, addr);
4866         if (ret || data.inactive_msec == (unsigned long) -1)
4867                 return -1;
4868         return data.inactive_msec / 1000;
4869 }
4870
4871
4872 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4873 {
4874 #if 0
4875         /* TODO */
4876 #endif
4877         return 0;
4878 }
4879
4880
4881 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4882                            int reason)
4883 {
4884         struct i802_bss *bss = priv;
4885         struct ieee80211_mgmt mgmt;
4886
4887         memset(&mgmt, 0, sizeof(mgmt));
4888         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4889                                           WLAN_FC_STYPE_DEAUTH);
4890         memcpy(mgmt.da, addr, ETH_ALEN);
4891         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4892         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4893         mgmt.u.deauth.reason_code = host_to_le16(reason);
4894         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4895                                             IEEE80211_HDRLEN +
4896                                             sizeof(mgmt.u.deauth));
4897 }
4898
4899
4900 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4901                              int reason)
4902 {
4903         struct i802_bss *bss = priv;
4904         struct ieee80211_mgmt mgmt;
4905
4906         memset(&mgmt, 0, sizeof(mgmt));
4907         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4908                                           WLAN_FC_STYPE_DISASSOC);
4909         memcpy(mgmt.da, addr, ETH_ALEN);
4910         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4911         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4912         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4913         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4914                                             IEEE80211_HDRLEN +
4915                                             sizeof(mgmt.u.disassoc));
4916 }
4917
4918
4919 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4920                              const char *brname, const char *ifname)
4921 {
4922         int ifindex;
4923         char in_br[IFNAMSIZ];
4924
4925         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4926         ifindex = if_nametoindex(brname);
4927         if (ifindex == 0) {
4928                 /*
4929                  * Bridge was configured, but the bridge device does
4930                  * not exist. Try to add it now.
4931                  */
4932                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4933                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4934                                    "bridge interface %s: %s",
4935                                    brname, strerror(errno));
4936                         return -1;
4937                 }
4938                 drv->added_bridge = 1;
4939                 add_ifidx(drv, if_nametoindex(brname));
4940         }
4941
4942         if (linux_br_get(in_br, ifname) == 0) {
4943                 if (os_strcmp(in_br, brname) == 0)
4944                         return 0; /* already in the bridge */
4945
4946                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4947                            "bridge %s", ifname, in_br);
4948                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4949                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4950                                    "remove interface %s from bridge "
4951                                    "%s: %s",
4952                                    ifname, brname, strerror(errno));
4953                         return -1;
4954                 }
4955         }
4956
4957         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4958                    ifname, brname);
4959         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4960                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4961                            "into bridge %s: %s",
4962                            ifname, brname, strerror(errno));
4963                 return -1;
4964         }
4965         drv->added_if_into_bridge = 1;
4966
4967         return 0;
4968 }
4969
4970
4971 static void *i802_init(struct hostapd_data *hapd,
4972                        struct wpa_init_params *params)
4973 {
4974         struct wpa_driver_nl80211_data *drv;
4975         struct i802_bss *bss;
4976         size_t i;
4977         char brname[IFNAMSIZ];
4978         int ifindex, br_ifindex;
4979         int br_added = 0;
4980
4981         bss = wpa_driver_nl80211_init(hapd, params->ifname);
4982         if (bss == NULL)
4983                 return NULL;
4984
4985         drv = bss->drv;
4986         if (linux_br_get(brname, params->ifname) == 0) {
4987                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4988                            params->ifname, brname);
4989                 br_ifindex = if_nametoindex(brname);
4990         } else {
4991                 brname[0] = '\0';
4992                 br_ifindex = 0;
4993         }
4994
4995         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4996         drv->if_indices = drv->default_if_indices;
4997         for (i = 0; i < params->num_bridge; i++) {
4998                 if (params->bridge[i]) {
4999                         ifindex = if_nametoindex(params->bridge[i]);
5000                         if (ifindex)
5001                                 add_ifidx(drv, ifindex);
5002                         if (ifindex == br_ifindex)
5003                                 br_added = 1;
5004                 }
5005         }
5006         if (!br_added && br_ifindex &&
5007             (params->num_bridge == 0 || !params->bridge[0]))
5008                 add_ifidx(drv, br_ifindex);
5009
5010         /* start listening for EAPOL on the default AP interface */
5011         add_ifidx(drv, drv->ifindex);
5012
5013         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
5014                 goto failed;
5015
5016         if (params->bssid) {
5017                 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
5018                                        params->bssid))
5019                         goto failed;
5020         }
5021
5022         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
5023                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
5024                            "into AP mode", bss->ifname);
5025                 goto failed;
5026         }
5027
5028         if (params->num_bridge && params->bridge[0] &&
5029             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
5030                 goto failed;
5031
5032         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
5033                 goto failed;
5034
5035         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
5036         if (drv->eapol_sock < 0) {
5037                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
5038                 goto failed;
5039         }
5040
5041         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
5042         {
5043                 printf("Could not register read socket for eapol\n");
5044                 goto failed;
5045         }
5046
5047         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
5048                 goto failed;
5049
5050         return bss;
5051
5052 failed:
5053         nl80211_remove_monitor_interface(drv);
5054         if (drv->ioctl_sock >= 0)
5055                 close(drv->ioctl_sock);
5056
5057         genl_family_put(drv->nl80211);
5058         nl_cache_free(drv->nl_cache);
5059         nl80211_handle_destroy(drv->nl_handle);
5060         nl_cb_put(drv->nl_cb);
5061
5062         os_free(drv);
5063         return NULL;
5064 }
5065
5066
5067 static void i802_deinit(void *priv)
5068 {
5069         wpa_driver_nl80211_deinit(priv);
5070 }
5071
5072 #endif /* HOSTAPD */
5073
5074
5075 static enum nl80211_iftype wpa_driver_nl80211_if_type(
5076         enum wpa_driver_if_type type)
5077 {
5078         switch (type) {
5079         case WPA_IF_STATION:
5080         case WPA_IF_P2P_CLIENT:
5081         case WPA_IF_P2P_GROUP:
5082                 return NL80211_IFTYPE_STATION;
5083         case WPA_IF_AP_VLAN:
5084                 return NL80211_IFTYPE_AP_VLAN;
5085         case WPA_IF_AP_BSS:
5086         case WPA_IF_P2P_GO:
5087                 return NL80211_IFTYPE_AP;
5088         }
5089         return -1;
5090 }
5091
5092
5093 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
5094                                      const char *ifname, const u8 *addr,
5095                                      void *bss_ctx, void **drv_priv,
5096                                      char *force_ifname, u8 *if_addr)
5097 {
5098         struct i802_bss *bss = priv;
5099         struct wpa_driver_nl80211_data *drv = bss->drv;
5100         int ifidx;
5101 #ifdef HOSTAPD
5102         struct i802_bss *new_bss = NULL;
5103
5104         if (type == WPA_IF_AP_BSS) {
5105                 new_bss = os_zalloc(sizeof(*new_bss));
5106                 if (new_bss == NULL)
5107                         return -1;
5108         }
5109 #endif /* HOSTAPD */
5110
5111         if (addr)
5112                 os_memcpy(if_addr, addr, ETH_ALEN);
5113         ifidx = nl80211_create_iface(drv, ifname,
5114                                      wpa_driver_nl80211_if_type(type), addr,
5115                                      0);
5116         if (ifidx < 0) {
5117 #ifdef HOSTAPD
5118                 os_free(new_bss);
5119 #endif /* HOSTAPD */
5120                 return -1;
5121         }
5122
5123         if (!addr &&
5124             linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0)
5125                 return -1;
5126
5127 #ifdef HOSTAPD
5128         if (type == WPA_IF_AP_BSS) {
5129                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
5130                         nl80211_remove_iface(drv, ifidx);
5131                         os_free(new_bss);
5132                         return -1;
5133                 }
5134                 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
5135                 new_bss->ifindex = ifidx;
5136                 new_bss->drv = drv;
5137                 new_bss->next = drv->first_bss.next;
5138                 drv->first_bss.next = new_bss;
5139                 if (drv_priv)
5140                         *drv_priv = new_bss;
5141         }
5142 #endif /* HOSTAPD */
5143
5144         return 0;
5145 }
5146
5147
5148 static int wpa_driver_nl80211_if_remove(void *priv,
5149                                         enum wpa_driver_if_type type,
5150                                         const char *ifname)
5151 {
5152         struct i802_bss *bss = priv;
5153         struct wpa_driver_nl80211_data *drv = bss->drv;
5154         int ifindex = if_nametoindex(ifname);
5155
5156         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
5157                    __func__, type, ifname, ifindex);
5158         if (ifindex <= 0)
5159                 return -1;
5160         nl80211_remove_iface(drv, ifindex);
5161
5162 #ifdef HOSTAPD
5163         if (type != WPA_IF_AP_BSS)
5164                 return 0;
5165
5166         if (bss != &drv->first_bss) {
5167                 struct i802_bss *tbss = &drv->first_bss;
5168
5169                 while (tbss) {
5170                         if (tbss->next != bss)
5171                                 continue;
5172
5173                         tbss->next = bss->next;
5174                         os_free(bss);
5175                         break;
5176                 }
5177         }
5178 #endif /* HOSTAPD */
5179
5180         return 0;
5181 }
5182
5183
5184 static int cookie_handler(struct nl_msg *msg, void *arg)
5185 {
5186         struct nlattr *tb[NL80211_ATTR_MAX + 1];
5187         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5188         u64 *cookie = arg;
5189         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
5190                   genlmsg_attrlen(gnlh, 0), NULL);
5191         if (tb[NL80211_ATTR_COOKIE])
5192                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
5193         return NL_SKIP;
5194 }
5195
5196
5197 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
5198                                           const u8 *dst, const u8 *src,
5199                                           const u8 *bssid,
5200                                           const u8 *data, size_t data_len)
5201 {
5202         struct i802_bss *bss = priv;
5203         struct wpa_driver_nl80211_data *drv = bss->drv;
5204         int ret = -1;
5205         struct nl_msg *msg;
5206         u8 *buf;
5207         struct ieee80211_hdr *hdr;
5208         u64 cookie;
5209
5210         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
5211                    drv->ifindex);
5212
5213         buf = os_zalloc(24 + data_len);
5214         if (buf == NULL)
5215                 return ret;
5216         os_memcpy(buf + 24, data, data_len);
5217         hdr = (struct ieee80211_hdr *) buf;
5218         hdr->frame_control =
5219                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
5220         os_memcpy(hdr->addr1, dst, ETH_ALEN);
5221         os_memcpy(hdr->addr2, src, ETH_ALEN);
5222         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
5223
5224         if (drv->nlmode == NL80211_IFTYPE_AP) {
5225                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
5226                 os_free(buf);
5227                 return ret;
5228         }
5229
5230         msg = nlmsg_alloc();
5231         if (!msg) {
5232                 os_free(buf);
5233                 return -1;
5234         }
5235
5236         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5237                     NL80211_CMD_FRAME, 0);
5238
5239         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5240         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5241         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
5242         os_free(buf);
5243         buf = NULL;
5244
5245         cookie = 0;
5246         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5247         msg = NULL;
5248         if (ret) {
5249                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
5250                            "(%s)", ret, strerror(-ret));
5251                 goto nla_put_failure;
5252         }
5253         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
5254                    "cookie 0x%llx", (long long unsigned int) cookie);
5255         drv->send_action_cookie = cookie;
5256         ret = 0;
5257
5258 nla_put_failure:
5259         os_free(buf);
5260         nlmsg_free(msg);
5261         return ret;
5262 }
5263
5264
5265 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
5266                                                 unsigned int duration)
5267 {
5268         struct i802_bss *bss = priv;
5269         struct wpa_driver_nl80211_data *drv = bss->drv;
5270         struct nl_msg *msg;
5271         int ret;
5272         u64 cookie;
5273
5274         msg = nlmsg_alloc();
5275         if (!msg)
5276                 return -1;
5277
5278         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5279                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
5280
5281         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5282         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5283         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5284
5285         cookie = 0;
5286         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5287         if (ret == 0) {
5288                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
5289                            "0x%llx for freq=%u MHz duration=%u",
5290                            (long long unsigned int) cookie, freq, duration);
5291                 drv->remain_on_chan_cookie = cookie;
5292                 return 0;
5293         }
5294         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
5295                    "(freq=%d duration=%u): %d (%s)",
5296                    freq, duration, ret, strerror(-ret));
5297 nla_put_failure:
5298         return -1;
5299 }
5300
5301
5302 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
5303 {
5304         struct i802_bss *bss = priv;
5305         struct wpa_driver_nl80211_data *drv = bss->drv;
5306         struct nl_msg *msg;
5307         int ret;
5308
5309         if (!drv->pending_remain_on_chan) {
5310                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
5311                            "to cancel");
5312                 return -1;
5313         }
5314
5315         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
5316                    "0x%llx",
5317                    (long long unsigned int) drv->remain_on_chan_cookie);
5318
5319         msg = nlmsg_alloc();
5320         if (!msg)
5321                 return -1;
5322
5323         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5324                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
5325
5326         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5327         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
5328
5329         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5330         if (ret == 0)
5331                 return 0;
5332         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
5333                    "%d (%s)", ret, strerror(-ret));
5334 nla_put_failure:
5335         return -1;
5336 }
5337
5338
5339 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
5340                                                         void *timeout_ctx)
5341 {
5342         struct wpa_driver_nl80211_data *drv = eloop_ctx;
5343         if (drv->monitor_ifidx < 0)
5344                 return; /* monitor interface already removed */
5345
5346         if (drv->nlmode != NL80211_IFTYPE_STATION)
5347                 return; /* not in station mode anymore */
5348
5349         if (drv->probe_req_report)
5350                 return; /* reporting enabled */
5351
5352         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
5353                    "Probe Request reporting needed anymore");
5354         nl80211_remove_monitor_interface(drv);
5355 }
5356
5357
5358 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
5359 {
5360         struct i802_bss *bss = priv;
5361         struct wpa_driver_nl80211_data *drv = bss->drv;
5362
5363         if (drv->nlmode != NL80211_IFTYPE_STATION) {
5364                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
5365                            "allowed in station mode (iftype=%d)",
5366                            drv->nlmode);
5367                 return -1;
5368         }
5369         drv->probe_req_report = report;
5370
5371         if (report) {
5372                 eloop_cancel_timeout(
5373                         wpa_driver_nl80211_probe_req_report_timeout,
5374                         drv, NULL);
5375                 if (drv->monitor_ifidx < 0 &&
5376                     nl80211_create_monitor_interface(drv))
5377                         return -1;
5378         } else {
5379                 /*
5380                  * It takes a while to remove the monitor interface, so try to
5381                  * avoid doing this if it is needed again shortly. Instead,
5382                  * schedule the interface to be removed later if no need for it
5383                  * is seen.
5384                  */
5385                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
5386                            "to be removed after 10 seconds of no use");
5387                 eloop_register_timeout(
5388                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
5389                         drv, NULL);
5390         }
5391
5392         return 0;
5393 }
5394
5395
5396 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5397                                      int ifindex, int disabled)
5398 {
5399         struct nl_msg *msg;
5400         struct nlattr *bands, *band;
5401         int ret;
5402
5403         msg = nlmsg_alloc();
5404         if (!msg)
5405                 return -1;
5406
5407         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5408                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5409         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5410
5411         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5412         if (!bands)
5413                 goto nla_put_failure;
5414
5415         /*
5416          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5417          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5418          * rates. All 5 GHz rates are left enabled.
5419          */
5420         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5421         if (!band)
5422                 goto nla_put_failure;
5423         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5424                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5425         nla_nest_end(msg, band);
5426
5427         nla_nest_end(msg, bands);
5428
5429         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5430         msg = NULL;
5431         if (ret) {
5432                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5433                            "(%s)", ret, strerror(-ret));
5434         }
5435
5436         return ret;
5437
5438 nla_put_failure:
5439         nlmsg_free(msg);
5440         return -1;
5441 }
5442
5443
5444 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5445 {
5446         struct i802_bss *bss = priv;
5447         struct wpa_driver_nl80211_data *drv = bss->drv;
5448         drv->disable_11b_rates = disabled;
5449         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5450 }
5451
5452
5453 static int wpa_driver_nl80211_deinit_ap(void *priv)
5454 {
5455         struct i802_bss *bss = priv;
5456         struct wpa_driver_nl80211_data *drv = bss->drv;
5457         if (drv->nlmode != NL80211_IFTYPE_AP)
5458                 return -1;
5459         wpa_driver_nl80211_del_beacon(drv);
5460         return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
5461 }
5462
5463
5464 static void wpa_driver_nl80211_resume(void *priv)
5465 {
5466         struct i802_bss *bss = priv;
5467         struct wpa_driver_nl80211_data *drv = bss->drv;
5468         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
5469                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5470                            "resume event");
5471         }
5472 }
5473
5474
5475 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
5476                                   const u8 *ies, size_t ies_len)
5477 {
5478         struct i802_bss *bss = priv;
5479         struct wpa_driver_nl80211_data *drv = bss->drv;
5480         int ret;
5481         u8 *data, *pos;
5482         size_t data_len;
5483         u8 own_addr[ETH_ALEN];
5484
5485         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
5486                 return -1;
5487
5488         if (action != 1) {
5489                 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
5490                            "action %d", action);
5491                 return -1;
5492         }
5493
5494         /*
5495          * Action frame payload:
5496          * Category[1] = 6 (Fast BSS Transition)
5497          * Action[1] = 1 (Fast BSS Transition Request)
5498          * STA Address
5499          * Target AP Address
5500          * FT IEs
5501          */
5502
5503         data_len = 2 + 2 * ETH_ALEN + ies_len;
5504         data = os_malloc(data_len);
5505         if (data == NULL)
5506                 return -1;
5507         pos = data;
5508         *pos++ = 0x06; /* FT Action category */
5509         *pos++ = action;
5510         os_memcpy(pos, own_addr, ETH_ALEN);
5511         pos += ETH_ALEN;
5512         os_memcpy(pos, target_ap, ETH_ALEN);
5513         pos += ETH_ALEN;
5514         os_memcpy(pos, ies, ies_len);
5515
5516         ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
5517                                              own_addr, drv->bssid,
5518                                              data, data_len);
5519         os_free(data);
5520
5521         return ret;
5522 }
5523
5524
5525 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
5526 {
5527         struct i802_bss *bss = priv;
5528         struct wpa_driver_nl80211_data *drv = bss->drv;
5529         struct nl_msg *msg, *cqm = NULL;
5530
5531         wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
5532                    "hysteresis=%d", threshold, hysteresis);
5533
5534         msg = nlmsg_alloc();
5535         if (!msg)
5536                 return -1;
5537
5538         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5539                     0, NL80211_CMD_SET_CQM, 0);
5540
5541         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
5542
5543         cqm = nlmsg_alloc();
5544         if (cqm == NULL)
5545                 return -1;
5546
5547         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
5548         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
5549         nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
5550
5551         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
5552                 return 0;
5553         msg = NULL;
5554
5555 nla_put_failure:
5556         if (cqm)
5557                 nlmsg_free(cqm);
5558         nlmsg_free(msg);
5559         return -1;
5560 }
5561
5562
5563 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
5564                               int encrypt)
5565 {
5566         struct i802_bss *bss = priv;
5567         struct wpa_driver_nl80211_data *drv = bss->drv;
5568         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
5569 }
5570
5571
5572 static int nl80211_set_intra_bss(void *priv, int enabled)
5573 {
5574         struct i802_bss *bss = priv;
5575         struct wpa_driver_nl80211_data *drv = bss->drv;
5576         struct nl_msg *msg;
5577
5578         msg = nlmsg_alloc();
5579         if (!msg)
5580                 return -ENOMEM;
5581
5582         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5583                     NL80211_CMD_SET_BSS, 0);
5584
5585         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
5586         NLA_PUT_U8(msg, NL80211_ATTR_AP_ISOLATE, !enabled);
5587
5588         return send_and_recv_msgs(drv, msg, NULL, NULL);
5589  nla_put_failure:
5590         return -ENOBUFS;
5591 }
5592
5593
5594 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5595         .name = "nl80211",
5596         .desc = "Linux nl80211/cfg80211",
5597         .get_bssid = wpa_driver_nl80211_get_bssid,
5598         .get_ssid = wpa_driver_nl80211_get_ssid,
5599         .set_key = wpa_driver_nl80211_set_key,
5600         .scan2 = wpa_driver_nl80211_scan,
5601         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5602         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5603         .disassociate = wpa_driver_nl80211_disassociate,
5604         .authenticate = wpa_driver_nl80211_authenticate,
5605         .associate = wpa_driver_nl80211_associate,
5606         .init = wpa_driver_nl80211_init,
5607         .deinit = wpa_driver_nl80211_deinit,
5608         .get_capa = wpa_driver_nl80211_get_capa,
5609         .set_operstate = wpa_driver_nl80211_set_operstate,
5610         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5611         .set_country = wpa_driver_nl80211_set_country,
5612         .set_beacon = wpa_driver_nl80211_set_beacon,
5613         .if_add = wpa_driver_nl80211_if_add,
5614         .if_remove = wpa_driver_nl80211_if_remove,
5615         .send_mlme = wpa_driver_nl80211_send_mlme,
5616         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5617         .sta_add = wpa_driver_nl80211_sta_add,
5618         .sta_remove = wpa_driver_nl80211_sta_remove,
5619         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5620         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5621 #ifdef HOSTAPD
5622         .hapd_init = i802_init,
5623         .hapd_deinit = i802_deinit,
5624         .get_seqnum = i802_get_seqnum,
5625         .flush = i802_flush,
5626         .read_sta_data = i802_read_sta_data,
5627         .sta_deauth = i802_sta_deauth,
5628         .sta_disassoc = i802_sta_disassoc,
5629         .get_inact_sec = i802_get_inact_sec,
5630         .sta_clear_stats = i802_sta_clear_stats,
5631         .set_rts = i802_set_rts,
5632         .set_frag = i802_set_frag,
5633         .set_rate_sets = i802_set_rate_sets,
5634         .set_cts_protect = i802_set_cts_protect,
5635         .set_preamble = i802_set_preamble,
5636         .set_short_slot_time = i802_set_short_slot_time,
5637         .set_tx_queue_params = i802_set_tx_queue_params,
5638         .set_sta_vlan = i802_set_sta_vlan,
5639         .set_wds_sta = i802_set_wds_sta,
5640 #endif /* HOSTAPD */
5641         .set_freq = i802_set_freq,
5642         .send_action = wpa_driver_nl80211_send_action,
5643         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5644         .cancel_remain_on_channel =
5645         wpa_driver_nl80211_cancel_remain_on_channel,
5646         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5647         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5648         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5649         .resume = wpa_driver_nl80211_resume,
5650         .send_ft_action = nl80211_send_ft_action,
5651         .signal_monitor = nl80211_signal_monitor,
5652         .send_frame = nl80211_send_frame,
5653         .set_intra_bss = nl80211_set_intra_bss,
5654 };