src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009-2010, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/genl/ctrl.h>
  25 #include <netpacket/packet.h>
  26 #include <linux/filter.h>
  27 #include "nl80211_copy.h"
  28
  29 #include "common.h"
  30 #include "eloop.h"
  31 #include "common/ieee802_11_defs.h"
  32 #include "netlink.h"
  33 #include "linux_ioctl.h"
  34 #include "radiotap.h"
  35 #include "radiotap_iter.h"
  36 #include "driver.h"
  37
  38 #ifdef CONFIG_LIBNL20
  39 /* libnl 2.0 compatibility code */
  40 #define nl_handle nl_sock
  41 #define nl_handle_alloc_cb nl_socket_alloc_cb
  42 #define nl_handle_destroy nl_socket_free
  43 #endif /* CONFIG_LIBNL20 */
  44
  45
  46 #ifndef IFF_LOWER_UP
  47 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  48 #endif
  49 #ifndef IFF_DORMANT
  50 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  51 #endif
  52
  53 #ifndef IF_OPER_DORMANT
  54 #define IF_OPER_DORMANT 5
  55 #endif
  56 #ifndef IF_OPER_UP
  57 #define IF_OPER_UP 6
  58 #endif
  59
  60 struct i802_bss {
  61         struct i802_bss *next;
  62         int ifindex;
  63         unsigned int beacon_set:1;
  64 };
  65
  66 struct wpa_driver_nl80211_data {
  67         void *ctx;
  68         struct netlink_data *netlink;
  69         int ioctl_sock; /* socket for ioctl() use */
  70         char ifname[IFNAMSIZ + 1];
  71         char brname[IFNAMSIZ];
  72         int ifindex;
  73         int if_removed;
  74         struct wpa_driver_capa capa;
  75         int has_capability;
  76
  77         int operstate;
  78
  79         int scan_complete_events;
  80
  81         struct nl_handle *nl_handle;
  82         struct nl_handle *nl_handle_event;
  83         struct nl_cache *nl_cache;
  84         struct nl_cache *nl_cache_event;
  85         struct nl_cb *nl_cb;
  86         struct genl_family *nl80211;
  87
  88         u8 auth_bssid[ETH_ALEN];
  89         u8 bssid[ETH_ALEN];
  90         int associated;
  91         u8 ssid[32];
  92         size_t ssid_len;
  93         int nlmode;
  94         int ap_scan_as_station;
  95         unsigned int assoc_freq;
  96
  97         int monitor_sock;
  98         int monitor_ifidx;
  99         int probe_req_report;
 100         int disable_11b_rates;
 101
 102         unsigned int beacon_set:1;
 103         unsigned int pending_remain_on_chan:1;
 104         unsigned int pending_send_action:1;
 105         unsigned int added_bridge:1;
 106         unsigned int added_if_into_bridge:1;
 107
 108         u64 remain_on_chan_cookie;
 109         u64 send_action_cookie;
 110
 111         struct wpa_driver_scan_filter *filter_ssids;
 112         size_t num_filter_ssids;
 113
 114 #ifdef HOSTAPD
 115         int eapol_sock; /* socket for EAPOL frames */
 116
 117         int default_if_indices[16];
 118         int *if_indices;
 119         int num_if_indices;
 120
 121         struct i802_bss bss;
 122
 123         int last_freq;
 124         int last_freq_ht;
 125 #endif /* HOSTAPD */
 126 };
 127
 128
 129 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 130                                             void *timeout_ctx);
 131 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 132 static int
 133 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 134 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 135                                    const u8 *addr, int cmd, u16 reason_code);
 136 static void nl80211_remove_monitor_interface(
 137         struct wpa_driver_nl80211_data *drv);
 138
 139 #ifdef HOSTAPD
 140 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 141 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 142 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 143                                  int ifindex);
 144 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 145 static int wpa_driver_nl80211_if_remove(void *priv,
 146                                         enum wpa_driver_if_type type,
 147                                         const char *ifname);
 148 #endif /* HOSTAPD */
 149
 150 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
 151                                                         void *timeout_ctx);
 152 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
 153                                      int ifindex, int disabled);
 154
 155
 156 /* nl80211 code */
 157 static int ack_handler(struct nl_msg *msg, void *arg)
 158 {
 159         int *err = arg;
 160         *err = 0;
 161         return NL_STOP;
 162 }
 163
 164 static int finish_handler(struct nl_msg *msg, void *arg)
 165 {
 166         int *ret = arg;
 167         *ret = 0;
 168         return NL_SKIP;
 169 }
 170
 171 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 172                          void *arg)
 173 {
 174         int *ret = arg;
 175         *ret = err->error;
 176         return NL_SKIP;
 177 }
 178
 179
 180 static int no_seq_check(struct nl_msg *msg, void *arg)
 181 {
 182         return NL_OK;
 183 }
 184
 185
 186 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
 187                          struct nl_handle *nl_handle, struct nl_msg *msg,
 188                          int (*valid_handler)(struct nl_msg *, void *),
 189                          void *valid_data)
 190 {
 191         struct nl_cb *cb;
 192         int err = -ENOMEM;
 193
 194         cb = nl_cb_clone(drv->nl_cb);
 195         if (!cb)
 196                 goto out;
 197
 198         err = nl_send_auto_complete(nl_handle, msg);
 199         if (err < 0)
 200                 goto out;
 201
 202         err = 1;
 203
 204         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 205         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 206         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 207
 208         if (valid_handler)
 209                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 210                           valid_handler, valid_data);
 211
 212         while (err > 0)
 213                 nl_recvmsgs(nl_handle, cb);
 214  out:
 215         nl_cb_put(cb);
 216         nlmsg_free(msg);
 217         return err;
 218 }
 219
 220
 221 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 222                               struct nl_msg *msg,
 223                               int (*valid_handler)(struct nl_msg *, void *),
 224                               void *valid_data)
 225 {
 226         return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
 227                              valid_data);
 228 }
 229
 230
 231 struct family_data {
 232         const char *group;
 233         int id;
 234 };
 235
 236
 237 static int family_handler(struct nl_msg *msg, void *arg)
 238 {
 239         struct family_data *res = arg;
 240         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 241         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 242         struct nlattr *mcgrp;
 243         int i;
 244
 245         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 246                   genlmsg_attrlen(gnlh, 0), NULL);
 247         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 248                 return NL_SKIP;
 249
 250         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 251                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 252                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 253                           nla_len(mcgrp), NULL);
 254                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 255                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 256                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 257                                res->group,
 258                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 259                         continue;
 260                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 261                 break;
 262         };
 263
 264         return NL_SKIP;
 265 }
 266
 267
 268 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 269                                const char *family, const char *group)
 270 {
 271         struct nl_msg *msg;
 272         int ret = -1;
 273         struct family_data res = { group, -ENOENT };
 274
 275         msg = nlmsg_alloc();
 276         if (!msg)
 277                 return -ENOMEM;
 278         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 279                     0, 0, CTRL_CMD_GETFAMILY, 0);
 280         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 281
 282         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 283         msg = NULL;
 284         if (ret == 0)
 285                 ret = res.id;
 286
 287 nla_put_failure:
 288         nlmsg_free(msg);
 289         return ret;
 290 }
 291
 292
 293 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 294 {
 295         struct wpa_driver_nl80211_data *drv = priv;
 296         if (!drv->associated)
 297                 return -1;
 298         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 299         return 0;
 300 }
 301
 302
 303 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 304 {
 305         struct wpa_driver_nl80211_data *drv = priv;
 306         if (!drv->associated)
 307                 return -1;
 308         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 309         return drv->ssid_len;
 310 }
 311
 312
 313 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 314                                           char *buf, size_t len, int del)
 315 {
 316         union wpa_event_data event;
 317
 318         os_memset(&event, 0, sizeof(event));
 319         if (len > sizeof(event.interface_status.ifname))
 320                 len = sizeof(event.interface_status.ifname) - 1;
 321         os_memcpy(event.interface_status.ifname, buf, len);
 322         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 323                 EVENT_INTERFACE_ADDED;
 324
 325         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 326                    del ? "DEL" : "NEW",
 327                    event.interface_status.ifname,
 328                    del ? "removed" : "added");
 329
 330         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 331                 if (del)
 332                         drv->if_removed = 1;
 333                 else
 334                         drv->if_removed = 0;
 335         }
 336
 337         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 338 }
 339
 340
 341 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 342                                          u8 *buf, size_t len)
 343 {
 344         int attrlen, rta_len;
 345         struct rtattr *attr;
 346
 347         attrlen = len;
 348         attr = (struct rtattr *) buf;
 349
 350         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 351         while (RTA_OK(attr, attrlen)) {
 352                 if (attr->rta_type == IFLA_IFNAME) {
 353                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 354                             == 0)
 355                                 return 1;
 356                         else
 357                                 break;
 358                 }
 359                 attr = RTA_NEXT(attr, attrlen);
 360         }
 361
 362         return 0;
 363 }
 364
 365
 366 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 367                                           int ifindex, u8 *buf, size_t len)
 368 {
 369         if (drv->ifindex == ifindex)
 370                 return 1;
 371
 372         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 373                 drv->ifindex = if_nametoindex(drv->ifname);
 374                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 375                            "interface");
 376                 wpa_driver_nl80211_finish_drv_init(drv);
 377                 return 1;
 378         }
 379
 380         return 0;
 381 }
 382
 383
 384 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 385                                                  struct ifinfomsg *ifi,
 386                                                  u8 *buf, size_t len)
 387 {
 388         struct wpa_driver_nl80211_data *drv = ctx;
 389         int attrlen, rta_len;
 390         struct rtattr *attr;
 391
 392         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 393                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 394                            ifi->ifi_index);
 395                 return;
 396         }
 397
 398         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 399                    "(%s%s%s%s)",
 400                    drv->operstate, ifi->ifi_flags,
 401                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 402                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 403                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 404                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 405         /*
 406          * Some drivers send the association event before the operup event--in
 407          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 408          * fails. This will hit us when wpa_supplicant does not need to do
 409          * IEEE 802.1X authentication
 410          */
 411         if (drv->operstate == 1 &&
 412             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 413             !(ifi->ifi_flags & IFF_RUNNING))
 414                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 415                                        -1, IF_OPER_UP);
 416
 417         attrlen = len;
 418         attr = (struct rtattr *) buf;
 419         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 420         while (RTA_OK(attr, attrlen)) {
 421                 if (attr->rta_type == IFLA_IFNAME) {
 422                         wpa_driver_nl80211_event_link(
 423                                 drv,
 424                                 ((char *) attr) + rta_len,
 425                                 attr->rta_len - rta_len, 0);
 426                 }
 427                 attr = RTA_NEXT(attr, attrlen);
 428         }
 429 }
 430
 431
 432 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 433                                                  struct ifinfomsg *ifi,
 434                                                  u8 *buf, size_t len)
 435 {
 436         struct wpa_driver_nl80211_data *drv = ctx;
 437         int attrlen, rta_len;
 438         struct rtattr *attr;
 439
 440         attrlen = len;
 441         attr = (struct rtattr *) buf;
 442
 443         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 444         while (RTA_OK(attr, attrlen)) {
 445                 if (attr->rta_type == IFLA_IFNAME) {
 446                         wpa_driver_nl80211_event_link(
 447                                 drv,
 448                                 ((char *) attr) + rta_len,
 449                                 attr->rta_len - rta_len, 1);
 450                 }
 451                 attr = RTA_NEXT(attr, attrlen);
 452         }
 453 }
 454
 455
 456 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 457                             const u8 *frame, size_t len)
 458 {
 459         const struct ieee80211_mgmt *mgmt;
 460         union wpa_event_data event;
 461
 462         mgmt = (const struct ieee80211_mgmt *) frame;
 463         if (len < 24 + sizeof(mgmt->u.auth)) {
 464                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 465                            "frame");
 466                 return;
 467         }
 468
 469         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 470         os_memset(&event, 0, sizeof(event));
 471         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 472         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 473         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 474         if (len > 24 + sizeof(mgmt->u.auth)) {
 475                 event.auth.ies = mgmt->u.auth.variable;
 476                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 477         }
 478
 479         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 480 }
 481
 482
 483 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 484                             const u8 *frame, size_t len)
 485 {
 486         const struct ieee80211_mgmt *mgmt;
 487         union wpa_event_data event;
 488         u16 status;
 489
 490         mgmt = (const struct ieee80211_mgmt *) frame;
 491         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 492                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 493                            "frame");
 494                 return;
 495         }
 496
 497         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 498         if (status != WLAN_STATUS_SUCCESS) {
 499                 os_memset(&event, 0, sizeof(event));
 500                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 501                         event.assoc_reject.resp_ies =
 502                                 (u8 *) mgmt->u.assoc_resp.variable;
 503                         event.assoc_reject.resp_ies_len =
 504                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 505                 }
 506                 event.assoc_reject.status_code = status;
 507
 508                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 509                 return;
 510         }
 511
 512         drv->associated = 1;
 513         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 514
 515         os_memset(&event, 0, sizeof(event));
 516         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 517                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 518                 event.assoc_info.resp_ies_len =
 519                         len - 24 - sizeof(mgmt->u.assoc_resp);
 520         }
 521
 522         event.assoc_info.freq = drv->assoc_freq;
 523
 524         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 525 }
 526
 527
 528 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 529                                enum nl80211_commands cmd, struct nlattr *status,
 530                                struct nlattr *addr, struct nlattr *req_ie,
 531                                struct nlattr *resp_ie)
 532 {
 533         union wpa_event_data event;
 534
 535         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 536                 /*
 537                  * Avoid reporting two association events that would confuse
 538                  * the core code.
 539                  */
 540                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 541                            "when using userspace SME", cmd);
 542                 return;
 543         }
 544
 545         os_memset(&event, 0, sizeof(event));
 546         if (cmd == NL80211_CMD_CONNECT &&
 547             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 548                 if (resp_ie) {
 549                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 550                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 551                 }
 552                 event.assoc_reject.status_code = nla_get_u16(status);
 553                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 554                 return;
 555         }
 556
 557         drv->associated = 1;
 558         if (addr)
 559                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 560
 561         if (req_ie) {
 562                 event.assoc_info.req_ies = nla_data(req_ie);
 563                 event.assoc_info.req_ies_len = nla_len(req_ie);
 564         }
 565         if (resp_ie) {
 566                 event.assoc_info.resp_ies = nla_data(resp_ie);
 567                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 568         }
 569
 570         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 571 }
 572
 573
 574 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 575                                enum nl80211_commands cmd, struct nlattr *addr)
 576 {
 577         union wpa_event_data event;
 578         enum wpa_event_type ev;
 579
 580         if (nla_len(addr) != ETH_ALEN)
 581                 return;
 582
 583         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 584                    cmd, MAC2STR((u8 *) nla_data(addr)));
 585
 586         if (cmd == NL80211_CMD_AUTHENTICATE)
 587                 ev = EVENT_AUTH_TIMED_OUT;
 588         else if (cmd == NL80211_CMD_ASSOCIATE)
 589                 ev = EVENT_ASSOC_TIMED_OUT;
 590         else
 591                 return;
 592
 593         os_memset(&event, 0, sizeof(event));
 594         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 595         wpa_supplicant_event(drv->ctx, ev, &event);
 596 }
 597
 598
 599 static void mlme_event_action(struct wpa_driver_nl80211_data *drv,
 600                               struct nlattr *freq, const u8 *frame, size_t len)
 601 {
 602         const struct ieee80211_mgmt *mgmt;
 603         union wpa_event_data event;
 604         u16 fc, stype;
 605
 606         mgmt = (const struct ieee80211_mgmt *) frame;
 607         if (len < 24) {
 608                 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
 609                 return;
 610         }
 611
 612         fc = le_to_host16(mgmt->frame_control);
 613         stype = WLAN_FC_GET_STYPE(fc);
 614
 615         os_memset(&event, 0, sizeof(event));
 616         event.rx_action.da = mgmt->da;
 617         event.rx_action.sa = mgmt->sa;
 618         event.rx_action.bssid = mgmt->bssid;
 619         event.rx_action.category = mgmt->u.action.category;
 620         event.rx_action.data = &mgmt->u.action.category + 1;
 621         event.rx_action.len = frame + len - event.rx_action.data;
 622         if (freq)
 623                 event.rx_action.freq = nla_get_u32(freq);
 624         wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
 625 }
 626
 627
 628 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
 629                                         struct nlattr *cookie, const u8 *frame,
 630                                         size_t len, struct nlattr *ack)
 631 {
 632         union wpa_event_data event;
 633         const struct ieee80211_hdr *hdr;
 634         u16 fc;
 635         u64 cookie_val;
 636
 637         if (!cookie)
 638                 return;
 639
 640         cookie_val = nla_get_u64(cookie);
 641         wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s",
 642                    (long long unsigned int) cookie_val,
 643                    cookie_val == drv->send_action_cookie ?
 644                    " (match)" : " (unknown)");
 645         if (cookie_val != drv->send_action_cookie)
 646                 return;
 647
 648         hdr = (const struct ieee80211_hdr *) frame;
 649         fc = le_to_host16(hdr->frame_control);
 650
 651         os_memset(&event, 0, sizeof(event));
 652         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
 653         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
 654         event.tx_status.dst = hdr->addr1;
 655         event.tx_status.data = frame;
 656         event.tx_status.data_len = len;
 657         event.tx_status.ack = ack != NULL;
 658         wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
 659 }
 660
 661
 662 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 663                        enum nl80211_commands cmd, struct nlattr *frame,
 664                        struct nlattr *addr, struct nlattr *timed_out,
 665                        struct nlattr *freq, struct nlattr *ack,
 666                        struct nlattr *cookie)
 667 {
 668         if (timed_out && addr) {
 669                 mlme_timeout_event(drv, cmd, addr);
 670                 return;
 671         }
 672
 673         if (frame == NULL) {
 674                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 675                            "data", cmd);
 676                 return;
 677         }
 678
 679         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 680         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 681                     nla_data(frame), nla_len(frame));
 682
 683         switch (cmd) {
 684         case NL80211_CMD_AUTHENTICATE:
 685                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 686                 break;
 687         case NL80211_CMD_ASSOCIATE:
 688                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 689                 break;
 690         case NL80211_CMD_DEAUTHENTICATE:
 691                 drv->associated = 0;
 692                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 693                 break;
 694         case NL80211_CMD_DISASSOCIATE:
 695                 drv->associated = 0;
 696                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 697                 break;
 698         case NL80211_CMD_ACTION:
 699                 mlme_event_action(drv, freq, nla_data(frame), nla_len(frame));
 700                 break;
 701         case NL80211_CMD_ACTION_TX_STATUS:
 702                 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
 703                                             nla_len(frame), ack);
 704                 break;
 705         default:
 706                 break;
 707         }
 708 }
 709
 710
 711 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 712                                            struct nlattr *tb[])
 713 {
 714         union wpa_event_data data;
 715
 716         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 717         os_memset(&data, 0, sizeof(data));
 718         if (tb[NL80211_ATTR_MAC]) {
 719                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 720                             nla_data(tb[NL80211_ATTR_MAC]),
 721                             nla_len(tb[NL80211_ATTR_MAC]));
 722                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 723         }
 724         if (tb[NL80211_ATTR_KEY_SEQ]) {
 725                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 726                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 727                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 728         }
 729         if (tb[NL80211_ATTR_KEY_TYPE]) {
 730                 enum nl80211_key_type key_type =
 731                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 732                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 733                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 734                         data.michael_mic_failure.unicast = 1;
 735         } else
 736                 data.michael_mic_failure.unicast = 1;
 737
 738         if (tb[NL80211_ATTR_KEY_IDX]) {
 739                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 740                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 741         }
 742
 743         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 744 }
 745
 746
 747 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 748                                  struct nlattr *tb[])
 749 {
 750         if (tb[NL80211_ATTR_MAC] == NULL) {
 751                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 752                            "event");
 753                 return;
 754         }
 755         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 756         drv->associated = 1;
 757         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 758                    MAC2STR(drv->bssid));
 759
 760         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 761 }
 762
 763
 764 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
 765                                          int cancel_event, struct nlattr *tb[])
 766 {
 767         unsigned int freq, chan_type, duration;
 768         union wpa_event_data data;
 769         u64 cookie;
 770
 771         if (tb[NL80211_ATTR_WIPHY_FREQ])
 772                 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 773         else
 774                 freq = 0;
 775
 776         if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
 777                 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 778         else
 779                 chan_type = 0;
 780
 781         if (tb[NL80211_ATTR_DURATION])
 782                 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
 783         else
 784                 duration = 0;
 785
 786         if (tb[NL80211_ATTR_COOKIE])
 787                 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
 788         else
 789                 cookie = 0;
 790
 791         wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
 792                    "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
 793                    cancel_event, freq, chan_type, duration,
 794                    (long long unsigned int) cookie,
 795                    cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
 796
 797         if (cookie != drv->remain_on_chan_cookie)
 798                 return; /* not for us */
 799
 800         drv->pending_remain_on_chan = !cancel_event;
 801
 802         os_memset(&data, 0, sizeof(data));
 803         data.remain_on_channel.freq = freq;
 804         data.remain_on_channel.duration = duration;
 805         wpa_supplicant_event(drv->ctx, cancel_event ?
 806                              EVENT_CANCEL_REMAIN_ON_CHANNEL :
 807                              EVENT_REMAIN_ON_CHANNEL, &data);
 808 }
 809
 810
 811 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 812                             struct nlattr *tb[])
 813 {
 814         union wpa_event_data event;
 815         struct nlattr *nl;
 816         int rem;
 817         struct scan_info *info;
 818 #define MAX_REPORT_FREQS 50
 819         int freqs[MAX_REPORT_FREQS];
 820         int num_freqs = 0;
 821
 822         os_memset(&event, 0, sizeof(event));
 823         info = &event.scan_info;
 824         info->aborted = aborted;
 825
 826         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 827                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
 828                         struct wpa_driver_scan_ssid *s =
 829                                 &info->ssids[info->num_ssids];
 830                         s->ssid = nla_data(nl);
 831                         s->ssid_len = nla_len(nl);
 832                         info->num_ssids++;
 833                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
 834                                 break;
 835                 }
 836         }
 837         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 838                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
 839                 {
 840                         freqs[num_freqs] = nla_get_u32(nl);
 841                         num_freqs++;
 842                         if (num_freqs == MAX_REPORT_FREQS - 1)
 843                                 break;
 844                 }
 845                 info->freqs = freqs;
 846                 info->num_freqs = num_freqs;
 847         }
 848         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
 849 }
 850
 851
 852 static int process_event(struct nl_msg *msg, void *arg)
 853 {
 854         struct wpa_driver_nl80211_data *drv = arg;
 855         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 856         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 857
 858         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 859                   genlmsg_attrlen(gnlh, 0), NULL);
 860
 861         if (tb[NL80211_ATTR_IFINDEX]) {
 862                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 863                 if (ifindex != drv->ifindex) {
 864                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 865                                    " for foreign interface (ifindex %d)",
 866                                    gnlh->cmd, ifindex);
 867                         return NL_SKIP;
 868                 }
 869         }
 870
 871         if (drv->ap_scan_as_station &&
 872             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 873              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 874                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 875                 drv->ap_scan_as_station = 0;
 876         }
 877
 878         switch (gnlh->cmd) {
 879         case NL80211_CMD_TRIGGER_SCAN:
 880                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 881                 break;
 882         case NL80211_CMD_NEW_SCAN_RESULTS:
 883                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 884                 drv->scan_complete_events = 1;
 885                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 886                                      drv->ctx);
 887                 send_scan_event(drv, 0, tb);
 888                 break;
 889         case NL80211_CMD_SCAN_ABORTED:
 890                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 891                 /*
 892                  * Need to indicate that scan results are available in order
 893                  * not to make wpa_supplicant stop its scanning.
 894                  */
 895                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 896                                      drv->ctx);
 897                 send_scan_event(drv, 1, tb);
 898                 break;
 899         case NL80211_CMD_AUTHENTICATE:
 900         case NL80211_CMD_ASSOCIATE:
 901         case NL80211_CMD_DEAUTHENTICATE:
 902         case NL80211_CMD_DISASSOCIATE:
 903         case NL80211_CMD_ACTION:
 904         case NL80211_CMD_ACTION_TX_STATUS:
 905                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 906                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
 907                            tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
 908                            tb[NL80211_ATTR_COOKIE]);
 909                 break;
 910         case NL80211_CMD_CONNECT:
 911         case NL80211_CMD_ROAM:
 912                 mlme_event_connect(drv, gnlh->cmd,
 913                                    tb[NL80211_ATTR_STATUS_CODE],
 914                                    tb[NL80211_ATTR_MAC],
 915                                    tb[NL80211_ATTR_REQ_IE],
 916                                    tb[NL80211_ATTR_RESP_IE]);
 917                 break;
 918         case NL80211_CMD_DISCONNECT:
 919                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 920                         /*
 921                          * Avoid reporting two disassociation events that could
 922                          * confuse the core code.
 923                          */
 924                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 925                                    "event when using userspace SME");
 926                         break;
 927                 }
 928                 drv->associated = 0;
 929                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 930                 break;
 931         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 932                 mlme_event_michael_mic_failure(drv, tb);
 933                 break;
 934         case NL80211_CMD_JOIN_IBSS:
 935                 mlme_event_join_ibss(drv, tb);
 936                 break;
 937         case NL80211_CMD_REMAIN_ON_CHANNEL:
 938                 mlme_event_remain_on_channel(drv, 0, tb);
 939                 break;
 940         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
 941                 mlme_event_remain_on_channel(drv, 1, tb);
 942                 break;
 943         default:
 944                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 945                            "(cmd=%d)", gnlh->cmd);
 946                 break;
 947         }
 948
 949         return NL_SKIP;
 950 }
 951
 952
 953 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 954                                              void *sock_ctx)
 955 {
 956         struct nl_cb *cb;
 957         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 958
 959         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 960
 961         cb = nl_cb_clone(drv->nl_cb);
 962         if (!cb)
 963                 return;
 964         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 965         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 966         nl_recvmsgs(drv->nl_handle_event, cb);
 967         nl_cb_put(cb);
 968 }
 969
 970
 971 /**
 972  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 973  * @priv: driver_nl80211 private data
 974  * @alpha2_arg: country to which to switch to
 975  * Returns: 0 on success, -1 on failure
 976  *
 977  * This asks nl80211 to set the regulatory domain for given
 978  * country ISO / IEC alpha2.
 979  */
 980 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 981 {
 982         struct wpa_driver_nl80211_data *drv = priv;
 983         char alpha2[3];
 984         struct nl_msg *msg;
 985
 986         msg = nlmsg_alloc();
 987         if (!msg)
 988                 return -ENOMEM;
 989
 990         alpha2[0] = alpha2_arg[0];
 991         alpha2[1] = alpha2_arg[1];
 992         alpha2[2] = '\0';
 993
 994         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 995                     0, NL80211_CMD_REQ_SET_REG, 0);
 996
 997         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 998         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 999                 return -EINVAL;
1000         return 0;
1001 nla_put_failure:
1002         return -EINVAL;
1003 }
1004
1005
1006 #ifndef HOSTAPD
1007 struct wiphy_info_data {
1008         int max_scan_ssids;
1009         int ap_supported;
1010         int auth_supported;
1011         int connect_supported;
1012 };
1013
1014
1015 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1016 {
1017         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1018         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1019         struct wiphy_info_data *info = arg;
1020
1021         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1022                   genlmsg_attrlen(gnlh, 0), NULL);
1023
1024         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1025                 info->max_scan_ssids =
1026                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1027
1028         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1029                 struct nlattr *nl_mode;
1030                 int i;
1031                 nla_for_each_nested(nl_mode,
1032                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1033                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1034                                 info->ap_supported = 1;
1035                                 break;
1036                         }
1037                 }
1038         }
1039
1040         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1041                 struct nlattr *nl_cmd;
1042                 int i;
1043
1044                 nla_for_each_nested(nl_cmd,
1045                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1046                         u32 cmd = nla_get_u32(nl_cmd);
1047                         if (cmd == NL80211_CMD_AUTHENTICATE)
1048                                 info->auth_supported = 1;
1049                         else if (cmd == NL80211_CMD_CONNECT)
1050                                 info->connect_supported = 1;
1051                 }
1052         }
1053
1054         return NL_SKIP;
1055 }
1056
1057
1058 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1059                                        struct wiphy_info_data *info)
1060 {
1061         struct nl_msg *msg;
1062
1063         os_memset(info, 0, sizeof(*info));
1064         msg = nlmsg_alloc();
1065         if (!msg)
1066                 return -1;
1067
1068         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1069                     0, NL80211_CMD_GET_WIPHY, 0);
1070
1071         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1072
1073         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1074                 return 0;
1075         msg = NULL;
1076 nla_put_failure:
1077         nlmsg_free(msg);
1078         return -1;
1079 }
1080
1081
1082 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1083 {
1084         struct wiphy_info_data info;
1085         if (wpa_driver_nl80211_get_info(drv, &info))
1086                 return -1;
1087         drv->has_capability = 1;
1088         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1089         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1090                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1091                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1092                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1093         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1094                 WPA_DRIVER_CAPA_ENC_WEP104 |
1095                 WPA_DRIVER_CAPA_ENC_TKIP |
1096                 WPA_DRIVER_CAPA_ENC_CCMP;
1097         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1098                 WPA_DRIVER_AUTH_SHARED |
1099                 WPA_DRIVER_AUTH_LEAP;
1100
1101         drv->capa.max_scan_ssids = info.max_scan_ssids;
1102         if (info.ap_supported)
1103                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1104
1105         if (info.auth_supported)
1106                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1107         else if (!info.connect_supported) {
1108                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1109                            "authentication/association or connect commands");
1110                 return -1;
1111         }
1112
1113         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1114
1115         return 0;
1116 }
1117 #endif /* HOSTAPD */
1118
1119
1120 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1121                                       void *ctx)
1122 {
1123         int ret;
1124
1125         /* Initialize generic netlink and nl80211 */
1126
1127         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1128         if (drv->nl_cb == NULL) {
1129                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1130                            "callbacks");
1131                 goto err1;
1132         }
1133
1134         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1135         if (drv->nl_handle == NULL) {
1136                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1137                            "callbacks");
1138                 goto err2;
1139         }
1140
1141         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1142         if (drv->nl_handle_event == NULL) {
1143                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1144                            "callbacks (event)");
1145                 goto err2b;
1146         }
1147
1148         if (genl_connect(drv->nl_handle)) {
1149                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1150                            "netlink");
1151                 goto err3;
1152         }
1153
1154         if (genl_connect(drv->nl_handle_event)) {
1155                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1156                            "netlink (event)");
1157                 goto err3;
1158         }
1159
1160 #ifdef CONFIG_LIBNL20
1161         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1162                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1163                            "netlink cache");
1164                 goto err3;
1165         }
1166         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1167             0) {
1168                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1169                            "netlink cache (event)");
1170                 goto err3b;
1171         }
1172 #else /* CONFIG_LIBNL20 */
1173         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1174         if (drv->nl_cache == NULL) {
1175                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1176                            "netlink cache");
1177                 goto err3;
1178         }
1179         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1180         if (drv->nl_cache_event == NULL) {
1181                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1182                            "netlink cache (event)");
1183                 goto err3b;
1184         }
1185 #endif /* CONFIG_LIBNL20 */
1186
1187         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1188         if (drv->nl80211 == NULL) {
1189                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1190                            "found");
1191                 goto err4;
1192         }
1193
1194         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1195         if (ret >= 0)
1196                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1197         if (ret < 0) {
1198                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1199                            "membership for scan events: %d (%s)",
1200                            ret, strerror(-ret));
1201                 goto err4;
1202         }
1203
1204         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1205         if (ret >= 0)
1206                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1207         if (ret < 0) {
1208                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1209                            "membership for mlme events: %d (%s)",
1210                            ret, strerror(-ret));
1211                 goto err4;
1212         }
1213
1214         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1215                                  wpa_driver_nl80211_event_receive, drv, ctx);
1216
1217         return 0;
1218
1219 err4:
1220         nl_cache_free(drv->nl_cache_event);
1221 err3b:
1222         nl_cache_free(drv->nl_cache);
1223 err3:
1224         nl_handle_destroy(drv->nl_handle_event);
1225 err2b:
1226         nl_handle_destroy(drv->nl_handle);
1227 err2:
1228         nl_cb_put(drv->nl_cb);
1229 err1:
1230         return -1;
1231 }
1232
1233
1234 /**
1235  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1236  * @ctx: context to be used when calling wpa_supplicant functions,
1237  * e.g., wpa_supplicant_event()
1238  * @ifname: interface name, e.g., wlan0
1239  * Returns: Pointer to private data, %NULL on failure
1240  */
1241 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1242 {
1243         struct wpa_driver_nl80211_data *drv;
1244         struct netlink_config *cfg;
1245
1246         drv = os_zalloc(sizeof(*drv));
1247         if (drv == NULL)
1248                 return NULL;
1249         drv->ctx = ctx;
1250         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1251         drv->monitor_ifidx = -1;
1252         drv->monitor_sock = -1;
1253         drv->ioctl_sock = -1;
1254
1255         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1256                 os_free(drv);
1257                 return NULL;
1258         }
1259
1260         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1261         if (drv->ioctl_sock < 0) {
1262                 perror("socket(PF_INET,SOCK_DGRAM)");
1263                 goto failed;
1264         }
1265
1266         cfg = os_zalloc(sizeof(*cfg));
1267         if (cfg == NULL)
1268                 goto failed;
1269         cfg->ctx = drv;
1270         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1271         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1272         drv->netlink = netlink_init(cfg);
1273         if (drv->netlink == NULL) {
1274                 os_free(cfg);
1275                 goto failed;
1276         }
1277         if (wpa_driver_nl80211_finish_drv_init(drv))
1278                 goto failed;
1279
1280         return drv;
1281
1282 failed:
1283         netlink_deinit(drv->netlink);
1284         if (drv->ioctl_sock >= 0)
1285                 close(drv->ioctl_sock);
1286
1287         genl_family_put(drv->nl80211);
1288         nl_cache_free(drv->nl_cache);
1289         nl_handle_destroy(drv->nl_handle);
1290         nl_cb_put(drv->nl_cb);
1291
1292         os_free(drv);
1293         return NULL;
1294 }
1295
1296
1297 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1298                                          const u8 *match, size_t match_len)
1299 {
1300         struct nl_msg *msg;
1301         int ret = -1;
1302
1303         msg = nlmsg_alloc();
1304         if (!msg)
1305                 return -1;
1306
1307         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1308                     NL80211_CMD_REGISTER_ACTION, 0);
1309
1310         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1311         NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1312
1313         ret = send_and_recv(drv, drv->nl_handle_event, msg, NULL, NULL);
1314         msg = NULL;
1315         if (ret) {
1316                 wpa_printf(MSG_DEBUG, "nl80211: Register Action command "
1317                            "failed: ret=%d (%s)", ret, strerror(-ret));
1318                 wpa_hexdump(MSG_DEBUG, "nl80211: Register Action match",
1319                             match, match_len);
1320                 goto nla_put_failure;
1321         }
1322         ret = 0;
1323 nla_put_failure:
1324         nlmsg_free(msg);
1325         return ret;
1326 }
1327
1328
1329 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1330 {
1331         if (0) {
1332                 /* Public Action frames */
1333                 return nl80211_register_action_frame(drv, (u8 *) "\x04", 1);
1334         }
1335         return 0;
1336 }
1337
1338
1339 static int
1340 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1341 {
1342         drv->ifindex = if_nametoindex(drv->ifname);
1343
1344 #ifndef HOSTAPD
1345         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1346                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1347                            "use managed mode");
1348         }
1349
1350         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
1351                 wpa_printf(MSG_ERROR, "Could not set interface '%s' UP",
1352                            drv->ifname);
1353                 return -1;
1354         }
1355
1356         if (wpa_driver_nl80211_capa(drv))
1357                 return -1;
1358
1359         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1360                                1, IF_OPER_DORMANT);
1361 #endif /* HOSTAPD */
1362
1363         if (nl80211_register_action_frames(drv) < 0)
1364                 return -1;
1365
1366         return 0;
1367 }
1368
1369
1370 #ifdef HOSTAPD
1371 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1372 {
1373         struct i802_bss *bss, *prev;
1374         bss = drv->bss.next;
1375         while (bss) {
1376                 prev = bss;
1377                 bss = bss->next;
1378                 os_free(bss);
1379         }
1380 }
1381 #endif /* HOSTAPD */
1382
1383
1384 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1385 {
1386         struct nl_msg *msg;
1387
1388         msg = nlmsg_alloc();
1389         if (!msg)
1390                 return -ENOMEM;
1391
1392         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1393                     0, NL80211_CMD_DEL_BEACON, 0);
1394         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1395
1396         return send_and_recv_msgs(drv, msg, NULL, NULL);
1397  nla_put_failure:
1398         return -ENOBUFS;
1399 }
1400
1401
1402 /**
1403  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1404  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1405  *
1406  * Shut down driver interface and processing of driver events. Free
1407  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1408  */
1409 static void wpa_driver_nl80211_deinit(void *priv)
1410 {
1411         struct wpa_driver_nl80211_data *drv = priv;
1412
1413         if (drv->added_if_into_bridge) {
1414                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, drv->ifname)
1415                     < 0)
1416                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1417                                    "interface %s from bridge %s: %s",
1418                                    drv->ifname, drv->brname, strerror(errno));
1419         }
1420         if (drv->added_bridge) {
1421                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1422                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1423                                    "bridge %s: %s",
1424                                    drv->brname, strerror(errno));
1425         }
1426
1427         nl80211_remove_monitor_interface(drv);
1428
1429         if (drv->nlmode == NL80211_IFTYPE_AP)
1430                 wpa_driver_nl80211_del_beacon(drv);
1431
1432 #ifdef HOSTAPD
1433         if (drv->last_freq_ht) {
1434                 /* Clear HT flags from the driver */
1435                 struct hostapd_freq_params freq;
1436                 os_memset(&freq, 0, sizeof(freq));
1437                 freq.freq = drv->last_freq;
1438                 i802_set_freq(priv, &freq);
1439         }
1440
1441         if (drv->eapol_sock >= 0) {
1442                 eloop_unregister_read_sock(drv->eapol_sock);
1443                 close(drv->eapol_sock);
1444         }
1445
1446         if (drv->if_indices != drv->default_if_indices)
1447                 os_free(drv->if_indices);
1448
1449         wpa_driver_nl80211_free_bss(drv);
1450 #endif /* HOSTAPD */
1451
1452         if (drv->disable_11b_rates)
1453                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1454
1455         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1456         netlink_deinit(drv->netlink);
1457
1458         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1459
1460         (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
1461         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1462
1463         if (drv->ioctl_sock >= 0)
1464                 close(drv->ioctl_sock);
1465
1466         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1467         genl_family_put(drv->nl80211);
1468         nl_cache_free(drv->nl_cache);
1469         nl_cache_free(drv->nl_cache_event);
1470         nl_handle_destroy(drv->nl_handle);
1471         nl_handle_destroy(drv->nl_handle_event);
1472         nl_cb_put(drv->nl_cb);
1473
1474         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1475                              drv, NULL);
1476
1477         os_free(drv->filter_ssids);
1478
1479         os_free(drv);
1480 }
1481
1482
1483 /**
1484  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1485  * @eloop_ctx: Driver private data
1486  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1487  *
1488  * This function can be used as registered timeout when starting a scan to
1489  * generate a scan completed event if the driver does not report this.
1490  */
1491 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1492 {
1493         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1494         if (drv->ap_scan_as_station) {
1495                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1496                 drv->ap_scan_as_station = 0;
1497         }
1498         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1499         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1500 }
1501
1502
1503 /**
1504  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1505  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1506  * @params: Scan parameters
1507  * Returns: 0 on success, -1 on failure
1508  */
1509 static int wpa_driver_nl80211_scan(void *priv,
1510                                    struct wpa_driver_scan_params *params)
1511 {
1512         struct wpa_driver_nl80211_data *drv = priv;
1513         int ret = 0, timeout;
1514         struct nl_msg *msg, *ssids, *freqs;
1515         size_t i;
1516
1517         msg = nlmsg_alloc();
1518         ssids = nlmsg_alloc();
1519         freqs = nlmsg_alloc();
1520         if (!msg || !ssids || !freqs) {
1521                 nlmsg_free(msg);
1522                 nlmsg_free(ssids);
1523                 nlmsg_free(freqs);
1524                 return -1;
1525         }
1526
1527         os_free(drv->filter_ssids);
1528         drv->filter_ssids = params->filter_ssids;
1529         params->filter_ssids = NULL;
1530         drv->num_filter_ssids = params->num_filter_ssids;
1531
1532         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1533                     NL80211_CMD_TRIGGER_SCAN, 0);
1534
1535         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1536
1537         for (i = 0; i < params->num_ssids; i++) {
1538                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1539                         params->ssids[i].ssid);
1540         }
1541         if (params->num_ssids)
1542                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1543
1544         if (params->extra_ies) {
1545                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1546                         params->extra_ies);
1547         }
1548
1549         if (params->freqs) {
1550                 for (i = 0; params->freqs[i]; i++)
1551                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1552                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1553         }
1554
1555         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1556         msg = NULL;
1557         if (ret) {
1558                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1559                            "(%s)", ret, strerror(-ret));
1560 #ifdef HOSTAPD
1561                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1562                         /*
1563                          * mac80211 does not allow scan requests in AP mode, so
1564                          * try to do this in station mode.
1565                          */
1566                         if (wpa_driver_nl80211_set_mode(drv,
1567                                                         IEEE80211_MODE_INFRA))
1568                                 goto nla_put_failure;
1569
1570                         if (wpa_driver_nl80211_scan(drv, params)) {
1571                                 wpa_driver_nl80211_set_mode(drv,
1572                                                             IEEE80211_MODE_AP);
1573                                 goto nla_put_failure;
1574                         }
1575
1576                         /* Restore AP mode when processing scan results */
1577                         drv->ap_scan_as_station = 1;
1578                         ret = 0;
1579                 } else
1580                         goto nla_put_failure;
1581 #else /* HOSTAPD */
1582                 goto nla_put_failure;
1583 #endif /* HOSTAPD */
1584         }
1585
1586         /* Not all drivers generate "scan completed" wireless event, so try to
1587          * read results after a timeout. */
1588         timeout = 10;
1589         if (drv->scan_complete_events) {
1590                 /*
1591                  * The driver seems to deliver events to notify when scan is
1592                  * complete, so use longer timeout to avoid race conditions
1593                  * with scanning and following association request.
1594                  */
1595                 timeout = 30;
1596         }
1597         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1598                    "seconds", ret, timeout);
1599         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1600         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1601                                drv, drv->ctx);
1602
1603 nla_put_failure:
1604         nlmsg_free(ssids);
1605         nlmsg_free(msg);
1606         nlmsg_free(freqs);
1607         return ret;
1608 }
1609
1610
1611 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
1612 {
1613         const u8 *end, *pos;
1614
1615         if (ies == NULL)
1616                 return NULL;
1617
1618         pos = ies;
1619         end = ies + ies_len;
1620
1621         while (pos + 1 < end) {
1622                 if (pos + 2 + pos[1] > end)
1623                         break;
1624                 if (pos[0] == ie)
1625                         return pos;
1626                 pos += 2 + pos[1];
1627         }
1628
1629         return NULL;
1630 }
1631
1632
1633 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
1634                                  const u8 *ie, size_t ie_len)
1635 {
1636         const u8 *ssid;
1637         size_t i;
1638
1639         if (drv->filter_ssids == NULL)
1640                 return 0;
1641
1642         ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
1643         if (ssid == NULL)
1644                 return 1;
1645
1646         for (i = 0; i < drv->num_filter_ssids; i++) {
1647                 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
1648                     os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
1649                     0)
1650                         return 0;
1651         }
1652
1653         return 1;
1654 }
1655
1656
1657 struct nl80211_bss_info_arg {
1658         struct wpa_driver_nl80211_data *drv;
1659         struct wpa_scan_results *res;
1660 };
1661
1662 static int bss_info_handler(struct nl_msg *msg, void *arg)
1663 {
1664         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1665         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1666         struct nlattr *bss[NL80211_BSS_MAX + 1];
1667         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1668                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1669                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1670                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1671                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1672                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1673                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1674                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1675                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1676                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1677                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1678                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
1679         };
1680         struct nl80211_bss_info_arg *_arg = arg;
1681         struct wpa_scan_results *res = _arg->res;
1682         struct wpa_scan_res **tmp;
1683         struct wpa_scan_res *r;
1684         const u8 *ie, *beacon_ie;
1685         size_t ie_len, beacon_ie_len;
1686         u8 *pos;
1687
1688         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1689                   genlmsg_attrlen(gnlh, 0), NULL);
1690         if (!tb[NL80211_ATTR_BSS])
1691                 return NL_SKIP;
1692         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1693                              bss_policy))
1694                 return NL_SKIP;
1695         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1696                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1697                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1698         } else {
1699                 ie = NULL;
1700                 ie_len = 0;
1701         }
1702         if (bss[NL80211_BSS_BEACON_IES]) {
1703                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
1704                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
1705         } else {
1706                 beacon_ie = NULL;
1707                 beacon_ie_len = 0;
1708         }
1709
1710         if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
1711                                   ie ? ie_len : beacon_ie_len))
1712                 return NL_SKIP;
1713
1714         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
1715         if (r == NULL)
1716                 return NL_SKIP;
1717         if (bss[NL80211_BSS_BSSID])
1718                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1719                           ETH_ALEN);
1720         if (bss[NL80211_BSS_FREQUENCY])
1721                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1722         if (bss[NL80211_BSS_BEACON_INTERVAL])
1723                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1724         if (bss[NL80211_BSS_CAPABILITY])
1725                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1726         r->flags |= WPA_SCAN_NOISE_INVALID;
1727         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1728                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1729                 r->level /= 100; /* mBm to dBm */
1730                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1731         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1732                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1733                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1734         } else
1735                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1736         if (bss[NL80211_BSS_TSF])
1737                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1738         if (bss[NL80211_BSS_SEEN_MS_AGO])
1739                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1740         r->ie_len = ie_len;
1741         pos = (u8 *) (r + 1);
1742         if (ie) {
1743                 os_memcpy(pos, ie, ie_len);
1744                 pos += ie_len;
1745         }
1746         r->beacon_ie_len = beacon_ie_len;
1747         if (beacon_ie)
1748                 os_memcpy(pos, beacon_ie, beacon_ie_len);
1749
1750         if (bss[NL80211_BSS_STATUS]) {
1751                 enum nl80211_bss_status status;
1752                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1753                 switch (status) {
1754                 case NL80211_BSS_STATUS_AUTHENTICATED:
1755                         r->flags |= WPA_SCAN_AUTHENTICATED;
1756                         break;
1757                 case NL80211_BSS_STATUS_ASSOCIATED:
1758                         r->flags |= WPA_SCAN_ASSOCIATED;
1759                         break;
1760                 default:
1761                         break;
1762                 }
1763         }
1764
1765         tmp = os_realloc(res->res,
1766                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1767         if (tmp == NULL) {
1768                 os_free(r);
1769                 return NL_SKIP;
1770         }
1771         tmp[res->num++] = r;
1772         res->res = tmp;
1773
1774         return NL_SKIP;
1775 }
1776
1777
1778 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1779                                  const u8 *addr)
1780 {
1781         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1782                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1783                            "mismatch (" MACSTR ")", MAC2STR(addr));
1784                 wpa_driver_nl80211_mlme(drv, addr,
1785                                         NL80211_CMD_DEAUTHENTICATE,
1786                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1787         }
1788 }
1789
1790
1791 static void wpa_driver_nl80211_check_bss_status(
1792         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1793 {
1794         size_t i;
1795
1796         for (i = 0; i < res->num; i++) {
1797                 struct wpa_scan_res *r = res->res[i];
1798                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1799                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1800                                    "indicates BSS status with " MACSTR
1801                                    " as authenticated",
1802                                    MAC2STR(r->bssid));
1803                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1804                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1805                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1806                             0) {
1807                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1808                                            " in local state (auth=" MACSTR
1809                                            " assoc=" MACSTR ")",
1810                                            MAC2STR(drv->auth_bssid),
1811                                            MAC2STR(drv->bssid));
1812                                 clear_state_mismatch(drv, r->bssid);
1813                         }
1814                 }
1815
1816                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1817                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1818                                    "indicate BSS status with " MACSTR
1819                                    " as associated",
1820                                    MAC2STR(r->bssid));
1821                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1822                             !drv->associated) {
1823                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1824                                            "(not associated) does not match "
1825                                            "with BSS state");
1826                                 clear_state_mismatch(drv, r->bssid);
1827                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1828                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1829                                    0) {
1830                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1831                                            "(associated with " MACSTR ") does "
1832                                            "not match with BSS state",
1833                                            MAC2STR(drv->bssid));
1834                                 clear_state_mismatch(drv, r->bssid);
1835                                 clear_state_mismatch(drv, drv->bssid);
1836                         }
1837                 }
1838         }
1839 }
1840
1841
1842 static void wpa_scan_results_free(struct wpa_scan_results *res)
1843 {
1844         size_t i;
1845
1846         if (res == NULL)
1847                 return;
1848
1849         for (i = 0; i < res->num; i++)
1850                 os_free(res->res[i]);
1851         os_free(res->res);
1852         os_free(res);
1853 }
1854
1855
1856 static struct wpa_scan_results *
1857 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
1858 {
1859         struct nl_msg *msg;
1860         struct wpa_scan_results *res;
1861         int ret;
1862         struct nl80211_bss_info_arg arg;
1863
1864         res = os_zalloc(sizeof(*res));
1865         if (res == NULL)
1866                 return NULL;
1867         msg = nlmsg_alloc();
1868         if (!msg)
1869                 goto nla_put_failure;
1870
1871         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1872                     NL80211_CMD_GET_SCAN, 0);
1873         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1874
1875         arg.drv = drv;
1876         arg.res = res;
1877         ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
1878         msg = NULL;
1879         if (ret == 0) {
1880                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1881                            (unsigned long) res->num);
1882                 return res;
1883         }
1884         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1885                    "(%s)", ret, strerror(-ret));
1886 nla_put_failure:
1887         nlmsg_free(msg);
1888         wpa_scan_results_free(res);
1889         return NULL;
1890 }
1891
1892
1893 /**
1894  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1895  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1896  * Returns: Scan results on success, -1 on failure
1897  */
1898 static struct wpa_scan_results *
1899 wpa_driver_nl80211_get_scan_results(void *priv)
1900 {
1901         struct wpa_driver_nl80211_data *drv = priv;
1902         struct wpa_scan_results *res;
1903
1904         res = nl80211_get_scan_results(drv);
1905         if (res)
1906                 wpa_driver_nl80211_check_bss_status(drv, res);
1907         return res;
1908 }
1909
1910
1911 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
1912 {
1913         struct wpa_scan_results *res;
1914         size_t i;
1915
1916         res = nl80211_get_scan_results(drv);
1917         if (res == NULL) {
1918                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
1919                 return;
1920         }
1921
1922         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
1923         for (i = 0; i < res->num; i++) {
1924                 struct wpa_scan_res *r = res->res[i];
1925                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
1926                            (int) i, (int) res->num, MAC2STR(r->bssid),
1927                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
1928                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
1929         }
1930
1931         wpa_scan_results_free(res);
1932 }
1933
1934
1935 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1936                                       enum wpa_alg alg, const u8 *addr,
1937                                       int key_idx, int set_tx,
1938                                       const u8 *seq, size_t seq_len,
1939                                       const u8 *key, size_t key_len)
1940 {
1941         struct wpa_driver_nl80211_data *drv = priv;
1942         int ifindex = if_nametoindex(ifname);
1943         struct nl_msg *msg;
1944         int ret;
1945
1946         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1947                    "set_tx=%d seq_len=%lu key_len=%lu",
1948                    __func__, ifindex, alg, addr, key_idx, set_tx,
1949                    (unsigned long) seq_len, (unsigned long) key_len);
1950
1951         msg = nlmsg_alloc();
1952         if (!msg)
1953                 return -ENOMEM;
1954
1955         if (alg == WPA_ALG_NONE) {
1956                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1957                             0, NL80211_CMD_DEL_KEY, 0);
1958         } else {
1959                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1960                             0, NL80211_CMD_NEW_KEY, 0);
1961                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1962                 switch (alg) {
1963                 case WPA_ALG_WEP:
1964                         if (key_len == 5)
1965                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1966                                             WLAN_CIPHER_SUITE_WEP40);
1967                         else
1968                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1969                                             WLAN_CIPHER_SUITE_WEP104);
1970                         break;
1971                 case WPA_ALG_TKIP:
1972                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1973                                     WLAN_CIPHER_SUITE_TKIP);
1974                         break;
1975                 case WPA_ALG_CCMP:
1976                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1977                                     WLAN_CIPHER_SUITE_CCMP);
1978                         break;
1979                 case WPA_ALG_IGTK:
1980                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1981                                     WLAN_CIPHER_SUITE_AES_CMAC);
1982                         break;
1983                 default:
1984                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1985                                    "algorithm %d", __func__, alg);
1986                         nlmsg_free(msg);
1987                         return -1;
1988                 }
1989         }
1990
1991         if (seq && seq_len)
1992                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1993
1994         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1995         {
1996                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1997                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1998         }
1999         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2000         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2001
2002         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2003         if (ret == -ENOENT && alg == WPA_ALG_NONE)
2004                 ret = 0;
2005         if (ret)
2006                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2007                            ret, strerror(-ret));
2008
2009         /*
2010          * If we failed or don't need to set the default TX key (below),
2011          * we're done here.
2012          */
2013         if (ret || !set_tx || alg == WPA_ALG_NONE)
2014                 return ret;
2015 #ifdef HOSTAPD /* FIX: is this needed? */
2016         if (addr)
2017                 return ret;
2018 #endif /* HOSTAPD */
2019
2020         msg = nlmsg_alloc();
2021         if (!msg)
2022                 return -ENOMEM;
2023
2024         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2025                     0, NL80211_CMD_SET_KEY, 0);
2026         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2027         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2028         if (alg == WPA_ALG_IGTK)
2029                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2030         else
2031                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2032
2033         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2034         if (ret == -ENOENT)
2035                 ret = 0;
2036         if (ret)
2037                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2038                            "err=%d %s)", ret, strerror(-ret));
2039         return ret;
2040
2041 nla_put_failure:
2042         return -ENOBUFS;
2043 }
2044
2045
2046 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2047                       int key_idx, int defkey,
2048                       const u8 *seq, size_t seq_len,
2049                       const u8 *key, size_t key_len)
2050 {
2051         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2052         if (!key_attr)
2053                 return -1;
2054
2055         if (defkey && alg == WPA_ALG_IGTK)
2056                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2057         else if (defkey)
2058                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2059
2060         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2061
2062         switch (alg) {
2063         case WPA_ALG_WEP:
2064                 if (key_len == 5)
2065                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2066                                     WLAN_CIPHER_SUITE_WEP40);
2067                 else
2068                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2069                                     WLAN_CIPHER_SUITE_WEP104);
2070                 break;
2071         case WPA_ALG_TKIP:
2072                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2073                 break;
2074         case WPA_ALG_CCMP:
2075                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2076                 break;
2077         case WPA_ALG_IGTK:
2078                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2079                             WLAN_CIPHER_SUITE_AES_CMAC);
2080                 break;
2081         default:
2082                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2083                            "algorithm %d", __func__, alg);
2084                 return -1;
2085         }
2086
2087         if (seq && seq_len)
2088                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2089
2090         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2091
2092         nla_nest_end(msg, key_attr);
2093
2094         return 0;
2095  nla_put_failure:
2096         return -1;
2097 }
2098
2099
2100 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2101                                  struct nl_msg *msg)
2102 {
2103         int i, privacy = 0;
2104         struct nlattr *nl_keys, *nl_key;
2105
2106         for (i = 0; i < 4; i++) {
2107                 if (!params->wep_key[i])
2108                         continue;
2109                 privacy = 1;
2110                 break;
2111         }
2112         if (!privacy)
2113                 return 0;
2114
2115         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2116
2117         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2118         if (!nl_keys)
2119                 goto nla_put_failure;
2120
2121         for (i = 0; i < 4; i++) {
2122                 if (!params->wep_key[i])
2123                         continue;
2124
2125                 nl_key = nla_nest_start(msg, i);
2126                 if (!nl_key)
2127                         goto nla_put_failure;
2128
2129                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2130                         params->wep_key[i]);
2131                 if (params->wep_key_len[i] == 5)
2132                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2133                                     WLAN_CIPHER_SUITE_WEP40);
2134                 else
2135                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2136                                     WLAN_CIPHER_SUITE_WEP104);
2137
2138                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2139
2140                 if (i == params->wep_tx_keyidx)
2141                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2142
2143                 nla_nest_end(msg, nl_key);
2144         }
2145         nla_nest_end(msg, nl_keys);
2146
2147         return 0;
2148
2149 nla_put_failure:
2150         return -ENOBUFS;
2151 }
2152
2153
2154 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2155                                    const u8 *addr, int cmd, u16 reason_code)
2156 {
2157         int ret = -1;
2158         struct nl_msg *msg;
2159
2160         msg = nlmsg_alloc();
2161         if (!msg)
2162                 return -1;
2163
2164         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2165
2166         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2167         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2168         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2169
2170         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2171         msg = NULL;
2172         if (ret) {
2173                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2174                            "(%s)", ret, strerror(-ret));
2175                 goto nla_put_failure;
2176         }
2177         ret = 0;
2178
2179 nla_put_failure:
2180         nlmsg_free(msg);
2181         return ret;
2182 }
2183
2184
2185 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2186                                          const u8 *addr, int reason_code)
2187 {
2188         wpa_printf(MSG_DEBUG, "%s", __func__);
2189         drv->associated = 0;
2190         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2191                                        reason_code);
2192 }
2193
2194
2195 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2196                                              int reason_code)
2197 {
2198         struct wpa_driver_nl80211_data *drv = priv;
2199         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2200                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2201         wpa_printf(MSG_DEBUG, "%s", __func__);
2202         drv->associated = 0;
2203         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2204                                        reason_code);
2205 }
2206
2207
2208 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2209                                            int reason_code)
2210 {
2211         struct wpa_driver_nl80211_data *drv = priv;
2212         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2213                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2214         wpa_printf(MSG_DEBUG, "%s", __func__);
2215         drv->associated = 0;
2216         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2217                                        reason_code);
2218 }
2219
2220
2221 static int wpa_driver_nl80211_authenticate(
2222         void *priv, struct wpa_driver_auth_params *params)
2223 {
2224         struct wpa_driver_nl80211_data *drv = priv;
2225         int ret = -1, i;
2226         struct nl_msg *msg;
2227         enum nl80211_auth_type type;
2228         int count = 0;
2229
2230         drv->associated = 0;
2231         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2232         /* FIX: IBSS mode */
2233         if (drv->nlmode != NL80211_IFTYPE_STATION)
2234                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2235
2236         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
2237                 return -1;
2238
2239 retry:
2240         msg = nlmsg_alloc();
2241         if (!msg)
2242                 return -1;
2243
2244         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2245                    drv->ifindex);
2246
2247         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2248                     NL80211_CMD_AUTHENTICATE, 0);
2249
2250         for (i = 0; i < 4; i++) {
2251                 if (!params->wep_key[i])
2252                         continue;
2253                 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
2254                                            i,
2255                                            i == params->wep_tx_keyidx, NULL, 0,
2256                                            params->wep_key[i],
2257                                            params->wep_key_len[i]);
2258                 if (params->wep_tx_keyidx != i)
2259                         continue;
2260                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2261                                params->wep_key[i], params->wep_key_len[i])) {
2262                         nlmsg_free(msg);
2263                         return -1;
2264                 }
2265         }
2266
2267         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2268         if (params->bssid) {
2269                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2270                            MAC2STR(params->bssid));
2271                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2272         }
2273         if (params->freq) {
2274                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2275                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2276         }
2277         if (params->ssid) {
2278                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2279                                   params->ssid, params->ssid_len);
2280                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2281                         params->ssid);
2282         }
2283         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2284         if (params->ie)
2285                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2286         /*
2287          * TODO: if multiple auth_alg options enabled, try them one by one if
2288          * the AP rejects authentication due to unknown auth alg
2289          */
2290         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2291                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2292         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2293                 type = NL80211_AUTHTYPE_SHARED_KEY;
2294         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2295                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2296         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2297                 type = NL80211_AUTHTYPE_FT;
2298         else
2299                 goto nla_put_failure;
2300         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2301         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2302
2303         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2304         msg = NULL;
2305         if (ret) {
2306                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2307                            "(%s)", ret, strerror(-ret));
2308                 count++;
2309                 if (ret == -EALREADY && count == 1 && params->bssid) {
2310                         /*
2311                          * mac80211 does not currently accept new
2312                          * authentication if we are already authenticated. As a
2313                          * workaround, force deauthentication and try again.
2314                          */
2315                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2316                                    "after forced deauthentication");
2317                         wpa_driver_nl80211_deauthenticate(
2318                                 drv, params->bssid,
2319                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2320                         nlmsg_free(msg);
2321                         goto retry;
2322                 }
2323                 goto nla_put_failure;
2324         }
2325         ret = 0;
2326         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2327                    "successfully");
2328
2329 nla_put_failure:
2330         nlmsg_free(msg);
2331         return ret;
2332 }
2333
2334
2335 struct phy_info_arg {
2336         u16 *num_modes;
2337         struct hostapd_hw_modes *modes;
2338 };
2339
2340 static int phy_info_handler(struct nl_msg *msg, void *arg)
2341 {
2342         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2343         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2344         struct phy_info_arg *phy_info = arg;
2345
2346         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2347
2348         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2349         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2350                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2351                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2352                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2353                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2354                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2355                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2356         };
2357
2358         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2359         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2360                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2361                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2362         };
2363
2364         struct nlattr *nl_band;
2365         struct nlattr *nl_freq;
2366         struct nlattr *nl_rate;
2367         int rem_band, rem_freq, rem_rate;
2368         struct hostapd_hw_modes *mode;
2369         int idx, mode_is_set;
2370
2371         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2372                   genlmsg_attrlen(gnlh, 0), NULL);
2373
2374         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2375                 return NL_SKIP;
2376
2377         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2378                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2379                 if (!mode)
2380                         return NL_SKIP;
2381                 phy_info->modes = mode;
2382
2383                 mode_is_set = 0;
2384
2385                 mode = &phy_info->modes[*(phy_info->num_modes)];
2386                 memset(mode, 0, sizeof(*mode));
2387                 *(phy_info->num_modes) += 1;
2388
2389                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2390                           nla_len(nl_band), NULL);
2391
2392                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2393                         mode->ht_capab = nla_get_u16(
2394                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2395                 }
2396
2397                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2398                         mode->a_mpdu_params |= nla_get_u8(
2399                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2400                                 0x03;
2401                 }
2402
2403                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2404                         mode->a_mpdu_params |= nla_get_u8(
2405                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2406                                 2;
2407                 }
2408
2409                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2410                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2411                         u8 *mcs;
2412                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2413                         os_memcpy(mode->mcs_set, mcs, 16);
2414                 }
2415
2416                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2417                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2418                                   nla_len(nl_freq), freq_policy);
2419                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2420                                 continue;
2421                         mode->num_channels++;
2422                 }
2423
2424                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2425                 if (!mode->channels)
2426                         return NL_SKIP;
2427
2428                 idx = 0;
2429
2430                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2431                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2432                                   nla_len(nl_freq), freq_policy);
2433                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2434                                 continue;
2435
2436                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2437                         mode->channels[idx].flag = 0;
2438
2439                         if (!mode_is_set) {
2440                                 /* crude heuristic */
2441                                 if (mode->channels[idx].freq < 4000)
2442                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2443                                 else
2444                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2445                                 mode_is_set = 1;
2446                         }
2447
2448                         /* crude heuristic */
2449                         if (mode->channels[idx].freq < 4000)
2450                                 if (mode->channels[idx].freq == 2484)
2451                                         mode->channels[idx].chan = 14;
2452                                 else
2453                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2454                         else
2455                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2456
2457                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2458                                 mode->channels[idx].flag |=
2459                                         HOSTAPD_CHAN_DISABLED;
2460                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2461                                 mode->channels[idx].flag |=
2462                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2463                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2464                                 mode->channels[idx].flag |=
2465                                         HOSTAPD_CHAN_NO_IBSS;
2466                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2467                                 mode->channels[idx].flag |=
2468                                         HOSTAPD_CHAN_RADAR;
2469
2470                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2471                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2472                                 mode->channels[idx].max_tx_power =
2473                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2474
2475                         idx++;
2476                 }
2477
2478                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2479                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2480                                   nla_len(nl_rate), rate_policy);
2481                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2482                                 continue;
2483                         mode->num_rates++;
2484                 }
2485
2486                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2487                 if (!mode->rates)
2488                         return NL_SKIP;
2489
2490                 idx = 0;
2491
2492                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2493                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2494                                   nla_len(nl_rate), rate_policy);
2495                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2496                                 continue;
2497                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2498
2499                         /* crude heuristic */
2500                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2501                             mode->rates[idx] > 200)
2502                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2503
2504                         idx++;
2505                 }
2506         }
2507
2508         return NL_SKIP;
2509 }
2510
2511 static struct hostapd_hw_modes *
2512 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2513 {
2514         u16 m;
2515         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2516         int i, mode11g_idx = -1;
2517
2518         /* If only 802.11g mode is included, use it to construct matching
2519          * 802.11b mode data. */
2520
2521         for (m = 0; m < *num_modes; m++) {
2522                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2523                         return modes; /* 802.11b already included */
2524                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2525                         mode11g_idx = m;
2526         }
2527
2528         if (mode11g_idx < 0)
2529                 return modes; /* 2.4 GHz band not supported at all */
2530
2531         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2532         if (nmodes == NULL)
2533                 return modes; /* Could not add 802.11b mode */
2534
2535         mode = &nmodes[*num_modes];
2536         os_memset(mode, 0, sizeof(*mode));
2537         (*num_modes)++;
2538         modes = nmodes;
2539
2540         mode->mode = HOSTAPD_MODE_IEEE80211B;
2541
2542         mode11g = &modes[mode11g_idx];
2543         mode->num_channels = mode11g->num_channels;
2544         mode->channels = os_malloc(mode11g->num_channels *
2545                                    sizeof(struct hostapd_channel_data));
2546         if (mode->channels == NULL) {
2547                 (*num_modes)--;
2548                 return modes; /* Could not add 802.11b mode */
2549         }
2550         os_memcpy(mode->channels, mode11g->channels,
2551                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2552
2553         mode->num_rates = 0;
2554         mode->rates = os_malloc(4 * sizeof(int));
2555         if (mode->rates == NULL) {
2556                 os_free(mode->channels);
2557                 (*num_modes)--;
2558                 return modes; /* Could not add 802.11b mode */
2559         }
2560
2561         for (i = 0; i < mode11g->num_rates; i++) {
2562                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2563                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2564                         continue;
2565                 mode->rates[mode->num_rates] = mode11g->rates[i];
2566                 mode->num_rates++;
2567                 if (mode->num_rates == 4)
2568                         break;
2569         }
2570
2571         if (mode->num_rates == 0) {
2572                 os_free(mode->channels);
2573                 os_free(mode->rates);
2574                 (*num_modes)--;
2575                 return modes; /* No 802.11b rates */
2576         }
2577
2578         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2579                    "information");
2580
2581         return modes;
2582 }
2583
2584
2585 static struct hostapd_hw_modes *
2586 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2587 {
2588         struct wpa_driver_nl80211_data *drv = priv;
2589         struct nl_msg *msg;
2590         struct phy_info_arg result = {
2591                 .num_modes = num_modes,
2592                 .modes = NULL,
2593         };
2594
2595         *num_modes = 0;
2596         *flags = 0;
2597
2598         msg = nlmsg_alloc();
2599         if (!msg)
2600                 return NULL;
2601
2602         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2603                     0, NL80211_CMD_GET_WIPHY, 0);
2604
2605         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2606
2607         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2608                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2609  nla_put_failure:
2610         return NULL;
2611 }
2612
2613
2614 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2615                                          const void *data, size_t len,
2616                                          int encrypt)
2617 {
2618         __u8 rtap_hdr[] = {
2619                 0x00, 0x00, /* radiotap version */
2620                 0x0e, 0x00, /* radiotap length */
2621                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2622                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2623                 0x00,       /* padding */
2624                 0x00, 0x00, /* RX and TX flags to indicate that */
2625                 0x00, 0x00, /* this is the injected frame directly */
2626         };
2627         struct iovec iov[2] = {
2628                 {
2629                         .iov_base = &rtap_hdr,
2630                         .iov_len = sizeof(rtap_hdr),
2631                 },
2632                 {
2633                         .iov_base = (void *) data,
2634                         .iov_len = len,
2635                 }
2636         };
2637         struct msghdr msg = {
2638                 .msg_name = NULL,
2639                 .msg_namelen = 0,
2640                 .msg_iov = iov,
2641                 .msg_iovlen = 2,
2642                 .msg_control = NULL,
2643                 .msg_controllen = 0,
2644                 .msg_flags = 0,
2645         };
2646
2647         if (encrypt)
2648                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2649
2650         return sendmsg(drv->monitor_sock, &msg, 0);
2651 }
2652
2653
2654 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2655                                         size_t data_len)
2656 {
2657         struct wpa_driver_nl80211_data *drv = priv;
2658         struct ieee80211_mgmt *mgmt;
2659         int encrypt = 1;
2660         u16 fc;
2661
2662         mgmt = (struct ieee80211_mgmt *) data;
2663         fc = le_to_host16(mgmt->frame_control);
2664
2665         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2666             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2667                 /*
2668                  * Only one of the authentication frame types is encrypted.
2669                  * In order for static WEP encryption to work properly (i.e.,
2670                  * to not encrypt the frame), we need to tell mac80211 about
2671                  * the frames that must not be encrypted.
2672                  */
2673                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2674                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2675                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2676                         encrypt = 0;
2677         }
2678
2679         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2680 }
2681
2682
2683 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2684                                          const u8 *head, size_t head_len,
2685                                          const u8 *tail, size_t tail_len,
2686                                          int dtim_period, int beacon_int)
2687 {
2688         struct wpa_driver_nl80211_data *drv = priv;
2689         struct nl_msg *msg;
2690         u8 cmd = NL80211_CMD_NEW_BEACON;
2691         int ret;
2692         int beacon_set;
2693         int ifindex = if_nametoindex(ifname);
2694 #ifdef HOSTAPD
2695         struct i802_bss *bss;
2696
2697         bss = get_bss(drv, ifindex);
2698         if (bss == NULL)
2699                 return -ENOENT;
2700         beacon_set = bss->beacon_set;
2701 #else /* HOSTAPD */
2702         beacon_set = drv->beacon_set;
2703 #endif /* HOSTAPD */
2704
2705         msg = nlmsg_alloc();
2706         if (!msg)
2707                 return -ENOMEM;
2708
2709         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2710                    beacon_set);
2711         if (beacon_set)
2712                 cmd = NL80211_CMD_SET_BEACON;
2713
2714         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2715                     0, cmd, 0);
2716         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2717         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2718         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2719         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2720         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2721
2722         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2723         if (ret) {
2724                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2725                            ret, strerror(-ret));
2726         } else {
2727 #ifdef HOSTAPD
2728                 bss->beacon_set = 1;
2729 #else /* HOSTAPD */
2730                 drv->beacon_set = 1;
2731 #endif /* HOSTAPD */
2732         }
2733         return ret;
2734  nla_put_failure:
2735         return -ENOBUFS;
2736 }
2737
2738
2739 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2740                                        int freq, int ht_enabled,
2741                                        int sec_channel_offset)
2742 {
2743         struct nl_msg *msg;
2744         int ret;
2745
2746         msg = nlmsg_alloc();
2747         if (!msg)
2748                 return -1;
2749
2750         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2751                     NL80211_CMD_SET_WIPHY, 0);
2752
2753         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2754         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2755         if (ht_enabled) {
2756                 switch (sec_channel_offset) {
2757                 case -1:
2758                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2759                                     NL80211_CHAN_HT40MINUS);
2760                         break;
2761                 case 1:
2762                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2763                                     NL80211_CHAN_HT40PLUS);
2764                         break;
2765                 default:
2766                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2767                                     NL80211_CHAN_HT20);
2768                         break;
2769                 }
2770         }
2771
2772         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2773         if (ret == 0)
2774                 return 0;
2775         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2776                    "%d (%s)", freq, ret, strerror(-ret));
2777 nla_put_failure:
2778         return -1;
2779 }
2780
2781
2782 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2783                                       struct hostapd_sta_add_params *params)
2784 {
2785         struct wpa_driver_nl80211_data *drv = priv;
2786         struct nl_msg *msg;
2787         int ret = -ENOBUFS;
2788
2789         msg = nlmsg_alloc();
2790         if (!msg)
2791                 return -ENOMEM;
2792
2793         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2794                     0, NL80211_CMD_NEW_STATION, 0);
2795
2796         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2797         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2798         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2799         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2800                 params->supp_rates);
2801         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2802                     params->listen_interval);
2803         if (params->ht_capabilities) {
2804                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2805                         sizeof(*params->ht_capabilities),
2806                         params->ht_capabilities);
2807         }
2808
2809         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2810         if (ret)
2811                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2812                            "result: %d (%s)", ret, strerror(-ret));
2813         if (ret == -EEXIST)
2814                 ret = 0;
2815  nla_put_failure:
2816         return ret;
2817 }
2818
2819
2820 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2821 {
2822         struct wpa_driver_nl80211_data *drv = priv;
2823         struct nl_msg *msg;
2824         int ret;
2825
2826         msg = nlmsg_alloc();
2827         if (!msg)
2828                 return -ENOMEM;
2829
2830         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2831                     0, NL80211_CMD_DEL_STATION, 0);
2832
2833         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2834                     if_nametoindex(drv->ifname));
2835         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2836
2837         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2838         if (ret == -ENOENT)
2839                 return 0;
2840         return ret;
2841  nla_put_failure:
2842         return -ENOBUFS;
2843 }
2844
2845
2846 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2847                                  int ifidx)
2848 {
2849         struct nl_msg *msg;
2850
2851         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
2852
2853 #ifdef HOSTAPD
2854         /* stop listening for EAPOL on this interface */
2855         del_ifidx(drv, ifidx);
2856 #endif /* HOSTAPD */
2857
2858         msg = nlmsg_alloc();
2859         if (!msg)
2860                 goto nla_put_failure;
2861
2862         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2863                     0, NL80211_CMD_DEL_INTERFACE, 0);
2864         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2865
2866         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2867                 return;
2868  nla_put_failure:
2869         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
2870 }
2871
2872
2873 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2874                                      const char *ifname,
2875                                      enum nl80211_iftype iftype,
2876                                      const u8 *addr, int wds)
2877 {
2878         struct nl_msg *msg, *flags = NULL;
2879         int ifidx;
2880         int ret = -ENOBUFS;
2881
2882         msg = nlmsg_alloc();
2883         if (!msg)
2884                 return -1;
2885
2886         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2887                     0, NL80211_CMD_NEW_INTERFACE, 0);
2888         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2889         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2890         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2891
2892         if (iftype == NL80211_IFTYPE_MONITOR) {
2893                 int err;
2894
2895                 flags = nlmsg_alloc();
2896                 if (!flags)
2897                         goto nla_put_failure;
2898
2899                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2900
2901                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2902
2903                 nlmsg_free(flags);
2904
2905                 if (err)
2906                         goto nla_put_failure;
2907         } else if (wds) {
2908                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
2909         }
2910
2911         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2912         if (ret) {
2913  nla_put_failure:
2914                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2915                            ifname, ret, strerror(-ret));
2916                 return ret;
2917         }
2918
2919         ifidx = if_nametoindex(ifname);
2920         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
2921                    ifname, ifidx);
2922
2923         if (ifidx <= 0)
2924                 return -1;
2925
2926 #ifdef HOSTAPD
2927         /* start listening for EAPOL on this interface */
2928         add_ifidx(drv, ifidx);
2929 #endif /* HOSTAPD */
2930
2931         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
2932             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
2933                 nl80211_remove_iface(drv, ifidx);
2934                 return -1;
2935         }
2936
2937         return ifidx;
2938 }
2939
2940
2941 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2942                                 const char *ifname, enum nl80211_iftype iftype,
2943                                 const u8 *addr, int wds)
2944 {
2945         int ret;
2946
2947         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
2948
2949         /* if error occured and interface exists already */
2950         if (ret == -ENFILE && if_nametoindex(ifname)) {
2951                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2952
2953                 /* Try to remove the interface that was already there. */
2954                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2955
2956                 /* Try to create the interface again */
2957                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
2958                                                 wds);
2959         }
2960
2961         if (ret >= 0 && drv->disable_11b_rates)
2962                 nl80211_disable_11b_rates(drv, ret, 1);
2963
2964         return ret;
2965 }
2966
2967
2968 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2969 {
2970         struct ieee80211_hdr *hdr;
2971         u16 fc;
2972         union wpa_event_data event;
2973
2974         hdr = (struct ieee80211_hdr *) buf;
2975         fc = le_to_host16(hdr->frame_control);
2976
2977         os_memset(&event, 0, sizeof(event));
2978         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2979         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2980         event.tx_status.dst = hdr->addr1;
2981         event.tx_status.data = buf;
2982         event.tx_status.data_len = len;
2983         event.tx_status.ack = ok;
2984         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2985 }
2986
2987
2988 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2989                              u8 *buf, size_t len)
2990 {
2991         union wpa_event_data event;
2992         os_memset(&event, 0, sizeof(event));
2993         event.rx_from_unknown.frame = buf;
2994         event.rx_from_unknown.len = len;
2995         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2996 }
2997
2998
2999 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3000                          u8 *buf, size_t len, int datarate, int ssi_signal)
3001 {
3002         struct ieee80211_hdr *hdr;
3003         u16 fc;
3004         union wpa_event_data event;
3005
3006         hdr = (struct ieee80211_hdr *) buf;
3007         fc = le_to_host16(hdr->frame_control);
3008
3009         switch (WLAN_FC_GET_TYPE(fc)) {
3010         case WLAN_FC_TYPE_MGMT:
3011                 os_memset(&event, 0, sizeof(event));
3012                 event.rx_mgmt.frame = buf;
3013                 event.rx_mgmt.frame_len = len;
3014                 event.rx_mgmt.datarate = datarate;
3015                 event.rx_mgmt.ssi_signal = ssi_signal;
3016                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3017                 break;
3018         case WLAN_FC_TYPE_CTRL:
3019                 /* can only get here with PS-Poll frames */
3020                 wpa_printf(MSG_DEBUG, "CTRL");
3021                 from_unknown_sta(drv, buf, len);
3022                 break;
3023         case WLAN_FC_TYPE_DATA:
3024                 from_unknown_sta(drv, buf, len);
3025                 break;
3026         }
3027 }
3028
3029
3030 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3031 {
3032         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3033         int len;
3034         unsigned char buf[3000];
3035         struct ieee80211_radiotap_iterator iter;
3036         int ret;
3037         int datarate = 0, ssi_signal = 0;
3038         int injected = 0, failed = 0, rxflags = 0;
3039
3040         len = recv(sock, buf, sizeof(buf), 0);
3041         if (len < 0) {
3042                 perror("recv");
3043                 return;
3044         }
3045
3046         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3047                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3048                            "frame since Probe Request reporting is disabled");
3049                 return;
3050         }
3051
3052         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3053                 printf("received invalid radiotap frame\n");
3054                 return;
3055         }
3056
3057         while (1) {
3058                 ret = ieee80211_radiotap_iterator_next(&iter);
3059                 if (ret == -ENOENT)
3060                         break;
3061                 if (ret) {
3062                         printf("received invalid radiotap frame (%d)\n", ret);
3063                         return;
3064                 }
3065                 switch (iter.this_arg_index) {
3066                 case IEEE80211_RADIOTAP_FLAGS:
3067                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3068                                 len -= 4;
3069                         break;
3070                 case IEEE80211_RADIOTAP_RX_FLAGS:
3071                         rxflags = 1;
3072                         break;
3073                 case IEEE80211_RADIOTAP_TX_FLAGS:
3074                         injected = 1;
3075                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3076                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3077                         break;
3078                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3079                         break;
3080                 case IEEE80211_RADIOTAP_CHANNEL:
3081                         /* TODO: convert from freq/flags to channel number */
3082                         break;
3083                 case IEEE80211_RADIOTAP_RATE:
3084                         datarate = *iter.this_arg * 5;
3085                         break;
3086                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3087                         ssi_signal = *iter.this_arg;
3088                         break;
3089                 }
3090         }
3091
3092         if (rxflags && injected)
3093                 return;
3094
3095         if (!injected)
3096                 handle_frame(drv, buf + iter.max_length,
3097                              len - iter.max_length, datarate, ssi_signal);
3098         else
3099                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3100                                    len - iter.max_length, !failed);
3101 }
3102
3103
3104 /*
3105  * we post-process the filter code later and rewrite
3106  * this to the offset to the last instruction
3107  */
3108 #define PASS    0xFF
3109 #define FAIL    0xFE
3110
3111 static struct sock_filter msock_filter_insns[] = {
3112         /*
3113          * do a little-endian load of the radiotap length field
3114          */
3115         /* load lower byte into A */
3116         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3117         /* put it into X (== index register) */
3118         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3119         /* load upper byte into A */
3120         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3121         /* left-shift it by 8 */
3122         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3123         /* or with X */
3124         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3125         /* put result into X */
3126         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3127
3128         /*
3129          * Allow management frames through, this also gives us those
3130          * management frames that we sent ourselves with status
3131          */
3132         /* load the lower byte of the IEEE 802.11 frame control field */
3133         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3134         /* mask off frame type and version */
3135         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3136         /* accept frame if it's both 0, fall through otherwise */
3137         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3138
3139         /*
3140          * TODO: add a bit to radiotap RX flags that indicates
3141          * that the sending station is not associated, then
3142          * add a filter here that filters on our DA and that flag
3143          * to allow us to deauth frames to that bad station.
3144          *
3145          * Not a regression -- we didn't do it before either.
3146          */
3147
3148 #if 0
3149         /*
3150          * drop non-data frames
3151          */
3152         /* load the lower byte of the frame control field */
3153         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3154         /* mask off QoS bit */
3155         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3156         /* drop non-data frames */
3157         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3158 #endif
3159         /* load the upper byte of the frame control field */
3160         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3161         /* mask off toDS/fromDS */
3162         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3163         /* accept WDS frames */
3164         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3165
3166         /*
3167          * add header length to index
3168          */
3169         /* load the lower byte of the frame control field */
3170         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3171         /* mask off QoS bit */
3172         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3173         /* right shift it by 6 to give 0 or 2 */
3174         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3175         /* add data frame header length */
3176         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3177         /* add index, was start of 802.11 header */
3178         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3179         /* move to index, now start of LL header */
3180         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3181
3182         /*
3183          * Accept empty data frames, we use those for
3184          * polling activity.
3185          */
3186         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3187         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3188
3189         /*
3190          * Accept EAPOL frames
3191          */
3192         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3193         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3194         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3195         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3196
3197         /* keep these last two statements or change the code below */
3198         /* return 0 == "DROP" */
3199         BPF_STMT(BPF_RET | BPF_K, 0),
3200         /* return ~0 == "keep all" */
3201         BPF_STMT(BPF_RET | BPF_K, ~0),
3202 };
3203
3204 static struct sock_fprog msock_filter = {
3205         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3206         .filter = msock_filter_insns,
3207 };
3208
3209
3210 static int add_monitor_filter(int s)
3211 {
3212         int idx;
3213
3214         /* rewrite all PASS/FAIL jump offsets */
3215         for (idx = 0; idx < msock_filter.len; idx++) {
3216                 struct sock_filter *insn = &msock_filter_insns[idx];
3217
3218                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3219                         if (insn->code == (BPF_JMP|BPF_JA)) {
3220                                 if (insn->k == PASS)
3221                                         insn->k = msock_filter.len - idx - 2;
3222                                 else if (insn->k == FAIL)
3223                                         insn->k = msock_filter.len - idx - 3;
3224                         }
3225
3226                         if (insn->jt == PASS)
3227                                 insn->jt = msock_filter.len - idx - 2;
3228                         else if (insn->jt == FAIL)
3229                                 insn->jt = msock_filter.len - idx - 3;
3230
3231                         if (insn->jf == PASS)
3232                                 insn->jf = msock_filter.len - idx - 2;
3233                         else if (insn->jf == FAIL)
3234                                 insn->jf = msock_filter.len - idx - 3;
3235                 }
3236         }
3237
3238         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3239                        &msock_filter, sizeof(msock_filter))) {
3240                 perror("SO_ATTACH_FILTER");
3241                 return -1;
3242         }
3243
3244         return 0;
3245 }
3246
3247
3248 static void nl80211_remove_monitor_interface(
3249         struct wpa_driver_nl80211_data *drv)
3250 {
3251         if (drv->monitor_ifidx >= 0) {
3252                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3253                 drv->monitor_ifidx = -1;
3254         }
3255         if (drv->monitor_sock >= 0) {
3256                 eloop_unregister_read_sock(drv->monitor_sock);
3257                 close(drv->monitor_sock);
3258                 drv->monitor_sock = -1;
3259         }
3260 }
3261
3262
3263 static int
3264 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3265 {
3266         char buf[IFNAMSIZ];
3267         struct sockaddr_ll ll;
3268         int optval;
3269         socklen_t optlen;
3270
3271         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3272         buf[IFNAMSIZ - 1] = '\0';
3273
3274         drv->monitor_ifidx =
3275                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3276                                      0);
3277
3278         if (drv->monitor_ifidx < 0)
3279                 return -1;
3280
3281         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3282                 goto error;
3283
3284         memset(&ll, 0, sizeof(ll));
3285         ll.sll_family = AF_PACKET;
3286         ll.sll_ifindex = drv->monitor_ifidx;
3287         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3288         if (drv->monitor_sock < 0) {
3289                 perror("socket[PF_PACKET,SOCK_RAW]");
3290                 goto error;
3291         }
3292
3293         if (add_monitor_filter(drv->monitor_sock)) {
3294                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3295                            "interface; do filtering in user space");
3296                 /* This works, but will cost in performance. */
3297         }
3298
3299         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3300                 perror("monitor socket bind");
3301                 goto error;
3302         }
3303
3304         optlen = sizeof(optval);
3305         optval = 20;
3306         if (setsockopt
3307             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3308                 perror("Failed to set socket priority");
3309                 goto error;
3310         }
3311
3312         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3313                                      drv, NULL)) {
3314                 printf("Could not register monitor read socket\n");
3315                 goto error;
3316         }
3317
3318         return 0;
3319  error:
3320         nl80211_remove_monitor_interface(drv);
3321         return -1;
3322 }
3323
3324
3325 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3326
3327 static int wpa_driver_nl80211_hapd_send_eapol(
3328         void *priv, const u8 *addr, const u8 *data,
3329         size_t data_len, int encrypt, const u8 *own_addr)
3330 {
3331         struct wpa_driver_nl80211_data *drv = priv;
3332         struct ieee80211_hdr *hdr;
3333         size_t len;
3334         u8 *pos;
3335         int res;
3336 #if 0 /* FIX */
3337         int qos = sta->flags & WPA_STA_WMM;
3338 #else
3339         int qos = 0;
3340 #endif
3341
3342         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3343                 data_len;
3344         hdr = os_zalloc(len);
3345         if (hdr == NULL) {
3346                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3347                        (unsigned long) len);
3348                 return -1;
3349         }
3350
3351         hdr->frame_control =
3352                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3353         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3354         if (encrypt)
3355                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3356 #if 0 /* To be enabled if qos determination is added above */
3357         if (qos) {
3358                 hdr->frame_control |=
3359                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3360         }
3361 #endif
3362
3363         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3364         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3365         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3366         pos = (u8 *) (hdr + 1);
3367
3368 #if 0 /* To be enabled if qos determination is added above */
3369         if (qos) {
3370                 /* add an empty QoS header if needed */
3371                 pos[0] = 0;
3372                 pos[1] = 0;
3373                 pos += 2;
3374         }
3375 #endif
3376
3377         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3378         pos += sizeof(rfc1042_header);
3379         WPA_PUT_BE16(pos, ETH_P_PAE);
3380         pos += 2;
3381         memcpy(pos, data, data_len);
3382
3383         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3384         if (res < 0) {
3385                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3386                            "failed: %d (%s)",
3387                            (unsigned long) len, errno, strerror(errno));
3388         }
3389         os_free(hdr);
3390
3391         return res;
3392 }
3393
3394
3395 static u32 sta_flags_nl80211(int flags)
3396 {
3397         u32 f = 0;
3398
3399         if (flags & WPA_STA_AUTHORIZED)
3400                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3401         if (flags & WPA_STA_WMM)
3402                 f |= BIT(NL80211_STA_FLAG_WME);
3403         if (flags & WPA_STA_SHORT_PREAMBLE)
3404                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3405         if (flags & WPA_STA_MFP)
3406                 f |= BIT(NL80211_STA_FLAG_MFP);
3407
3408         return f;
3409 }
3410
3411
3412 static int wpa_driver_nl80211_sta_set_flags(const char *ifname, void *priv,
3413                                             const u8 *addr, int total_flags,
3414                                             int flags_or, int flags_and)
3415 {
3416         struct wpa_driver_nl80211_data *drv = priv;
3417         struct nl_msg *msg, *flags = NULL;
3418         struct nl80211_sta_flag_update upd;
3419
3420         msg = nlmsg_alloc();
3421         if (!msg)
3422                 return -ENOMEM;
3423
3424         flags = nlmsg_alloc();
3425         if (!flags) {
3426                 nlmsg_free(msg);
3427                 return -ENOMEM;
3428         }
3429
3430         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3431                     0, NL80211_CMD_SET_STATION, 0);
3432
3433         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3434                     if_nametoindex(ifname));
3435         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3436
3437         /*
3438          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3439          * can be removed eventually.
3440          */
3441         if (total_flags & WPA_STA_AUTHORIZED)
3442                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3443
3444         if (total_flags & WPA_STA_WMM)
3445                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3446
3447         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3448                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3449
3450         if (total_flags & WPA_STA_MFP)
3451                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3452
3453         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3454                 goto nla_put_failure;
3455
3456         os_memset(&upd, 0, sizeof(upd));
3457         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3458         upd.set = sta_flags_nl80211(flags_or);
3459         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3460
3461         nlmsg_free(flags);
3462
3463         return send_and_recv_msgs(drv, msg, NULL, NULL);
3464  nla_put_failure:
3465         nlmsg_free(flags);
3466         return -ENOBUFS;
3467 }
3468
3469
3470 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3471                                  struct wpa_driver_associate_params *params)
3472 {
3473         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3474             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3475                 nl80211_remove_monitor_interface(drv);
3476                 return -1;
3477         }
3478
3479         /* TODO: setup monitor interface (and add code somewhere to remove this
3480          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3481
3482         return 0;
3483 }
3484
3485
3486 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3487 {
3488         struct nl_msg *msg;
3489         int ret = -1;
3490
3491         msg = nlmsg_alloc();
3492         if (!msg)
3493                 return -1;
3494
3495         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3496                     NL80211_CMD_LEAVE_IBSS, 0);
3497         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3498         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3499         msg = NULL;
3500         if (ret) {
3501                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3502                            "(%s)", ret, strerror(-ret));
3503                 goto nla_put_failure;
3504         }
3505
3506         ret = 0;
3507         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3508
3509 nla_put_failure:
3510         nlmsg_free(msg);
3511         return ret;
3512 }
3513
3514
3515 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3516                                    struct wpa_driver_associate_params *params)
3517 {
3518         struct nl_msg *msg;
3519         int ret = -1;
3520         int count = 0;
3521
3522         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3523
3524         if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3525                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3526                            "IBSS mode");
3527                 return -1;
3528         }
3529
3530 retry:
3531         msg = nlmsg_alloc();
3532         if (!msg)
3533                 return -1;
3534
3535         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3536                     NL80211_CMD_JOIN_IBSS, 0);
3537         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3538
3539         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3540                 goto nla_put_failure;
3541
3542         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3543                           params->ssid, params->ssid_len);
3544         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3545                 params->ssid);
3546         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3547         drv->ssid_len = params->ssid_len;
3548
3549         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3550         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3551
3552         ret = nl80211_set_conn_keys(params, msg);
3553         if (ret)
3554                 goto nla_put_failure;
3555
3556         if (params->wpa_ie) {
3557                 wpa_hexdump(MSG_DEBUG,
3558                             "  * Extra IEs for Beacon/Probe Response frames",
3559                             params->wpa_ie, params->wpa_ie_len);
3560                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3561                         params->wpa_ie);
3562         }
3563
3564         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3565         msg = NULL;
3566         if (ret) {
3567                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3568                            ret, strerror(-ret));
3569                 count++;
3570                 if (ret == -EALREADY && count == 1) {
3571                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3572                                    "forced leave");
3573                         nl80211_leave_ibss(drv);
3574                         nlmsg_free(msg);
3575                         goto retry;
3576                 }
3577
3578                 goto nla_put_failure;
3579         }
3580         ret = 0;
3581         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3582
3583 nla_put_failure:
3584         nlmsg_free(msg);
3585         return ret;
3586 }
3587
3588
3589 static int wpa_driver_nl80211_connect(
3590         struct wpa_driver_nl80211_data *drv,
3591         struct wpa_driver_associate_params *params)
3592 {
3593         struct nl_msg *msg;
3594         enum nl80211_auth_type type;
3595         int ret = 0;
3596
3597         msg = nlmsg_alloc();
3598         if (!msg)
3599                 return -1;
3600
3601         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3602         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3603                     NL80211_CMD_CONNECT, 0);
3604
3605         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3606         if (params->bssid) {
3607                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3608                            MAC2STR(params->bssid));
3609                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3610         }
3611         if (params->freq) {
3612                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3613                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3614         }
3615         if (params->ssid) {
3616                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3617                                   params->ssid, params->ssid_len);
3618                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3619                         params->ssid);
3620                 if (params->ssid_len > sizeof(drv->ssid))
3621                         goto nla_put_failure;
3622                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3623                 drv->ssid_len = params->ssid_len;
3624         }
3625         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3626         if (params->wpa_ie)
3627                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3628                         params->wpa_ie);
3629
3630         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3631                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3632         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3633                 type = NL80211_AUTHTYPE_SHARED_KEY;
3634         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3635                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3636         else if (params->auth_alg & WPA_AUTH_ALG_FT)
3637                 type = NL80211_AUTHTYPE_FT;
3638         else
3639                 goto nla_put_failure;
3640
3641         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3642         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3643
3644         if (params->wpa_ie && params->wpa_ie_len) {
3645                 enum nl80211_wpa_versions ver;
3646
3647                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3648                         ver = NL80211_WPA_VERSION_2;
3649                 else
3650                         ver = NL80211_WPA_VERSION_1;
3651
3652                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3653                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3654         }
3655
3656         if (params->pairwise_suite != CIPHER_NONE) {
3657                 int cipher;
3658
3659                 switch (params->pairwise_suite) {
3660                 case CIPHER_WEP40:
3661                         cipher = WLAN_CIPHER_SUITE_WEP40;
3662                         break;
3663                 case CIPHER_WEP104:
3664                         cipher = WLAN_CIPHER_SUITE_WEP104;
3665                         break;
3666                 case CIPHER_CCMP:
3667                         cipher = WLAN_CIPHER_SUITE_CCMP;
3668                         break;
3669                 case CIPHER_TKIP:
3670                 default:
3671                         cipher = WLAN_CIPHER_SUITE_TKIP;
3672                         break;
3673                 }
3674                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3675         }
3676
3677         if (params->group_suite != CIPHER_NONE) {
3678                 int cipher;
3679
3680                 switch (params->group_suite) {
3681                 case CIPHER_WEP40:
3682                         cipher = WLAN_CIPHER_SUITE_WEP40;
3683                         break;
3684                 case CIPHER_WEP104:
3685                         cipher = WLAN_CIPHER_SUITE_WEP104;
3686                         break;
3687                 case CIPHER_CCMP:
3688                         cipher = WLAN_CIPHER_SUITE_CCMP;
3689                         break;
3690                 case CIPHER_TKIP:
3691                 default:
3692                         cipher = WLAN_CIPHER_SUITE_TKIP;
3693                         break;
3694                 }
3695                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3696         }
3697
3698         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3699             params->key_mgmt_suite == KEY_MGMT_PSK) {
3700                 int mgmt = WLAN_AKM_SUITE_PSK;
3701
3702                 switch (params->key_mgmt_suite) {
3703                 case KEY_MGMT_802_1X:
3704                         mgmt = WLAN_AKM_SUITE_8021X;
3705                         break;
3706                 case KEY_MGMT_PSK:
3707                 default:
3708                         mgmt = WLAN_AKM_SUITE_PSK;
3709                         break;
3710                 }
3711                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3712         }
3713
3714         ret = nl80211_set_conn_keys(params, msg);
3715         if (ret)
3716                 goto nla_put_failure;
3717
3718         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3719         msg = NULL;
3720         if (ret) {
3721                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3722                            "(%s)", ret, strerror(-ret));
3723                 goto nla_put_failure;
3724         }
3725         ret = 0;
3726         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3727
3728 nla_put_failure:
3729         nlmsg_free(msg);
3730         return ret;
3731
3732 }
3733
3734
3735 static int wpa_driver_nl80211_associate(
3736         void *priv, struct wpa_driver_associate_params *params)
3737 {
3738         struct wpa_driver_nl80211_data *drv = priv;
3739         int ret = -1;
3740         struct nl_msg *msg;
3741
3742         if (params->mode == IEEE80211_MODE_AP)
3743                 return wpa_driver_nl80211_ap(drv, params);
3744
3745         if (params->mode == IEEE80211_MODE_IBSS)
3746                 return wpa_driver_nl80211_ibss(drv, params);
3747
3748         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3749                 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3750                         return -1;
3751                 return wpa_driver_nl80211_connect(drv, params);
3752         }
3753
3754         drv->associated = 0;
3755
3756         msg = nlmsg_alloc();
3757         if (!msg)
3758                 return -1;
3759
3760         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3761                    drv->ifindex);
3762         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3763                     NL80211_CMD_ASSOCIATE, 0);
3764
3765         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3766         if (params->bssid) {
3767                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3768                            MAC2STR(params->bssid));
3769                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3770         }
3771         if (params->freq) {
3772                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3773                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3774                 drv->assoc_freq = params->freq;
3775         } else
3776                 drv->assoc_freq = 0;
3777         if (params->ssid) {
3778                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3779                                   params->ssid, params->ssid_len);
3780                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3781                         params->ssid);
3782                 if (params->ssid_len > sizeof(drv->ssid))
3783                         goto nla_put_failure;
3784                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3785                 drv->ssid_len = params->ssid_len;
3786         }
3787         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3788         if (params->wpa_ie)
3789                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3790                         params->wpa_ie);
3791
3792 #ifdef CONFIG_IEEE80211W
3793         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3794                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3795 #endif /* CONFIG_IEEE80211W */
3796
3797         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3798
3799         if (params->prev_bssid) {
3800                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3801                            MAC2STR(params->prev_bssid));
3802                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3803                         params->prev_bssid);
3804         }
3805
3806         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3807         msg = NULL;
3808         if (ret) {
3809                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3810                            "(%s)", ret, strerror(-ret));
3811                 nl80211_dump_scan(drv);
3812                 goto nla_put_failure;
3813         }
3814         ret = 0;
3815         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3816                    "successfully");
3817
3818 nla_put_failure:
3819         nlmsg_free(msg);
3820         return ret;
3821 }
3822
3823
3824 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3825                             int ifindex, int mode)
3826 {
3827         struct nl_msg *msg;
3828         int ret = -ENOBUFS;
3829
3830         msg = nlmsg_alloc();
3831         if (!msg)
3832                 return -ENOMEM;
3833
3834         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3835                     0, NL80211_CMD_SET_INTERFACE, 0);
3836         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3837         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3838
3839         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3840         if (!ret)
3841                 return 0;
3842 nla_put_failure:
3843         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3844                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3845         return ret;
3846 }
3847
3848
3849 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3850 {
3851         struct wpa_driver_nl80211_data *drv = priv;
3852         int ret = -1;
3853         int nlmode;
3854
3855         switch (mode) {
3856         case 0:
3857                 nlmode = NL80211_IFTYPE_STATION;
3858                 break;
3859         case 1:
3860                 nlmode = NL80211_IFTYPE_ADHOC;
3861                 break;
3862         case 2:
3863                 nlmode = NL80211_IFTYPE_AP;
3864                 break;
3865         default:
3866                 return -1;
3867         }
3868
3869         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3870                 drv->nlmode = nlmode;
3871                 ret = 0;
3872                 goto done;
3873         }
3874
3875         if (nlmode == drv->nlmode) {
3876                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
3877                            "requested mode - ignore error");
3878                 ret = 0;
3879                 goto done; /* Already in the requested mode */
3880         }
3881
3882         /* mac80211 doesn't allow mode changes while the device is up, so
3883          * take the device down, try to set the mode again, and bring the
3884          * device back up.
3885          */
3886         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
3887                 /* Try to set the mode again while the interface is down */
3888                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3889                 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1))
3890                         ret = -1;
3891         }
3892
3893         if (!ret) {
3894                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
3895                            "interface is down");
3896                 drv->nlmode = nlmode;
3897         }
3898
3899 done:
3900         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3901                 /* Setup additional AP mode functionality if needed */
3902                 if (drv->monitor_ifidx < 0 &&
3903                     nl80211_create_monitor_interface(drv))
3904                         return -1;
3905         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3906                 /* Remove additional AP mode functionality */
3907                 nl80211_remove_monitor_interface(drv);
3908 #ifndef HOSTAPD
3909                 drv->beacon_set = 0;
3910 #endif /* HOSTAPD */
3911         }
3912
3913         if (ret)
3914                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
3915                            "from %d failed", nlmode, drv->nlmode);
3916
3917         return ret;
3918 }
3919
3920
3921 static int wpa_driver_nl80211_get_capa(void *priv,
3922                                        struct wpa_driver_capa *capa)
3923 {
3924         struct wpa_driver_nl80211_data *drv = priv;
3925         if (!drv->has_capability)
3926                 return -1;
3927         os_memcpy(capa, &drv->capa, sizeof(*capa));
3928         return 0;
3929 }
3930
3931
3932 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3933 {
3934         struct wpa_driver_nl80211_data *drv = priv;
3935
3936         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3937                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3938         drv->operstate = state;
3939         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3940                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
3941 }
3942
3943
3944 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3945 {
3946         struct wpa_driver_nl80211_data *drv = priv;
3947         struct nl_msg *msg;
3948         struct nl80211_sta_flag_update upd;
3949
3950         msg = nlmsg_alloc();
3951         if (!msg)
3952                 return -ENOMEM;
3953
3954         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3955                     0, NL80211_CMD_SET_STATION, 0);
3956
3957         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3958                     if_nametoindex(drv->ifname));
3959         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3960
3961         os_memset(&upd, 0, sizeof(upd));
3962         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3963         if (authorized)
3964                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3965         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3966
3967         return send_and_recv_msgs(drv, msg, NULL, NULL);
3968  nla_put_failure:
3969         return -ENOBUFS;
3970 }
3971
3972
3973 #ifdef HOSTAPD
3974
3975 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3976                                  int ifindex)
3977 {
3978         struct i802_bss *bss = &drv->bss;
3979         while (bss) {
3980                 if (ifindex == bss->ifindex)
3981                         return bss;
3982                 bss = bss->next;
3983         }
3984         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3985         return NULL;
3986 }
3987
3988
3989 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3990 {
3991         int i;
3992         int *old;
3993
3994         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3995                    ifidx);
3996         for (i = 0; i < drv->num_if_indices; i++) {
3997                 if (drv->if_indices[i] == 0) {
3998                         drv->if_indices[i] = ifidx;
3999                         return;
4000                 }
4001         }
4002
4003         if (drv->if_indices != drv->default_if_indices)
4004                 old = drv->if_indices;
4005         else
4006                 old = NULL;
4007
4008         drv->if_indices = os_realloc(old,
4009                                      sizeof(int) * (drv->num_if_indices + 1));
4010         if (!drv->if_indices) {
4011                 if (!old)
4012                         drv->if_indices = drv->default_if_indices;
4013                 else
4014                         drv->if_indices = old;
4015                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4016                            "interfaces");
4017                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4018                 return;
4019         }
4020         drv->if_indices[drv->num_if_indices] = ifidx;
4021         drv->num_if_indices++;
4022 }
4023
4024
4025 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4026 {
4027         int i;
4028
4029         for (i = 0; i < drv->num_if_indices; i++) {
4030                 if (drv->if_indices[i] == ifidx) {
4031                         drv->if_indices[i] = 0;
4032                         break;
4033                 }
4034         }
4035 }
4036
4037
4038 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4039 {
4040         int i;
4041
4042         for (i = 0; i < drv->num_if_indices; i++)
4043                 if (drv->if_indices[i] == ifidx)
4044                         return 1;
4045
4046         return 0;
4047 }
4048
4049
4050 static inline int min_int(int a, int b)
4051 {
4052         if (a < b)
4053                 return a;
4054         return b;
4055 }
4056
4057
4058 static int get_key_handler(struct nl_msg *msg, void *arg)
4059 {
4060         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4061         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4062
4063         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4064                   genlmsg_attrlen(gnlh, 0), NULL);
4065
4066         /*
4067          * TODO: validate the key index and mac address!
4068          * Otherwise, there's a race condition as soon as
4069          * the kernel starts sending key notifications.
4070          */
4071
4072         if (tb[NL80211_ATTR_KEY_SEQ])
4073                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4074                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4075         return NL_SKIP;
4076 }
4077
4078
4079 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4080                            int idx, u8 *seq)
4081 {
4082         struct wpa_driver_nl80211_data *drv = priv;
4083         struct nl_msg *msg;
4084
4085         msg = nlmsg_alloc();
4086         if (!msg)
4087                 return -ENOMEM;
4088
4089         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4090                     0, NL80211_CMD_GET_KEY, 0);
4091
4092         if (addr)
4093                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4094         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4095         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4096
4097         memset(seq, 0, 6);
4098
4099         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4100  nla_put_failure:
4101         return -ENOBUFS;
4102 }
4103
4104
4105 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4106                               int mode)
4107 {
4108         struct wpa_driver_nl80211_data *drv = priv;
4109         struct nl_msg *msg;
4110         u8 rates[NL80211_MAX_SUPP_RATES];
4111         u8 rates_len = 0;
4112         int i;
4113
4114         msg = nlmsg_alloc();
4115         if (!msg)
4116                 return -ENOMEM;
4117
4118         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4119                     NL80211_CMD_SET_BSS, 0);
4120
4121         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4122                 rates[rates_len++] = basic_rates[i] / 5;
4123
4124         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4125
4126         /* TODO: multi-BSS support */
4127         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4128
4129         return send_and_recv_msgs(drv, msg, NULL, NULL);
4130  nla_put_failure:
4131         return -ENOBUFS;
4132 }
4133
4134
4135 /* Set kernel driver on given frequency (MHz) */
4136 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4137 {
4138         struct wpa_driver_nl80211_data *drv = priv;
4139         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4140                                            freq->sec_channel_offset);
4141 }
4142
4143
4144 static int i802_set_rts(void *priv, int rts)
4145 {
4146         struct wpa_driver_nl80211_data *drv = priv;
4147         struct nl_msg *msg;
4148         int ret = -ENOBUFS;
4149         u32 val;
4150
4151         msg = nlmsg_alloc();
4152         if (!msg)
4153                 return -ENOMEM;
4154
4155         if (rts >= 2347)
4156                 val = (u32) -1;
4157         else
4158                 val = rts;
4159
4160         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4161                     0, NL80211_CMD_SET_WIPHY, 0);
4162         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4163         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4164
4165         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4166         if (!ret)
4167                 return 0;
4168 nla_put_failure:
4169         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4170                    "%d (%s)", rts, ret, strerror(-ret));
4171         return ret;
4172 }
4173
4174
4175 static int i802_set_frag(void *priv, int frag)
4176 {
4177         struct wpa_driver_nl80211_data *drv = priv;
4178         struct nl_msg *msg;
4179         int ret = -ENOBUFS;
4180         u32 val;
4181
4182         msg = nlmsg_alloc();
4183         if (!msg)
4184                 return -ENOMEM;
4185
4186         if (frag >= 2346)
4187                 val = (u32) -1;
4188         else
4189                 val = frag;
4190
4191         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4192                     0, NL80211_CMD_SET_WIPHY, 0);
4193         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4194         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4195
4196         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4197         if (!ret)
4198                 return 0;
4199 nla_put_failure:
4200         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4201                    "%d: %d (%s)", frag, ret, strerror(-ret));
4202         return ret;
4203 }
4204
4205
4206 static int i802_flush(void *priv)
4207 {
4208         struct wpa_driver_nl80211_data *drv = priv;
4209         struct nl_msg *msg;
4210
4211         msg = nlmsg_alloc();
4212         if (!msg)
4213                 return -1;
4214
4215         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4216                     0, NL80211_CMD_DEL_STATION, 0);
4217
4218         /*
4219          * XXX: FIX! this needs to flush all VLANs too
4220          */
4221         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4222                     if_nametoindex(drv->ifname));
4223
4224         return send_and_recv_msgs(drv, msg, NULL, NULL);
4225  nla_put_failure:
4226         return -ENOBUFS;
4227 }
4228
4229
4230 static int get_sta_handler(struct nl_msg *msg, void *arg)
4231 {
4232         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4233         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4234         struct hostap_sta_driver_data *data = arg;
4235         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4236         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4237                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4238                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4239                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4240                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4241                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4242         };
4243
4244         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4245                   genlmsg_attrlen(gnlh, 0), NULL);
4246
4247         /*
4248          * TODO: validate the interface and mac address!
4249          * Otherwise, there's a race condition as soon as
4250          * the kernel starts sending station notifications.
4251          */
4252
4253         if (!tb[NL80211_ATTR_STA_INFO]) {
4254                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4255                 return NL_SKIP;
4256         }
4257         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4258                              tb[NL80211_ATTR_STA_INFO],
4259                              stats_policy)) {
4260                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4261                 return NL_SKIP;
4262         }
4263
4264         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4265                 data->inactive_msec =
4266                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4267         if (stats[NL80211_STA_INFO_RX_BYTES])
4268                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4269         if (stats[NL80211_STA_INFO_TX_BYTES])
4270                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4271         if (stats[NL80211_STA_INFO_RX_PACKETS])
4272                 data->rx_packets =
4273                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4274         if (stats[NL80211_STA_INFO_TX_PACKETS])
4275                 data->tx_packets =
4276                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4277
4278         return NL_SKIP;
4279 }
4280
4281 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4282                               const u8 *addr)
4283 {
4284         struct wpa_driver_nl80211_data *drv = priv;
4285         struct nl_msg *msg;
4286
4287         os_memset(data, 0, sizeof(*data));
4288         msg = nlmsg_alloc();
4289         if (!msg)
4290                 return -ENOMEM;
4291
4292         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4293                     0, NL80211_CMD_GET_STATION, 0);
4294
4295         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4296         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4297
4298         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4299  nla_put_failure:
4300         return -ENOBUFS;
4301 }
4302
4303
4304 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4305                                     int cw_min, int cw_max, int burst_time)
4306 {
4307         struct wpa_driver_nl80211_data *drv = priv;
4308         struct nl_msg *msg;
4309         struct nlattr *txq, *params;
4310
4311         msg = nlmsg_alloc();
4312         if (!msg)
4313                 return -1;
4314
4315         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4316                     0, NL80211_CMD_SET_WIPHY, 0);
4317
4318         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4319
4320         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4321         if (!txq)
4322                 goto nla_put_failure;
4323
4324         /* We are only sending parameters for a single TXQ at a time */
4325         params = nla_nest_start(msg, 1);
4326         if (!params)
4327                 goto nla_put_failure;
4328
4329         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4330         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4331          * 32 usec, so need to convert the value here. */
4332         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4333         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4334         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4335         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4336
4337         nla_nest_end(msg, params);
4338
4339         nla_nest_end(msg, txq);
4340
4341         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4342                 return 0;
4343  nla_put_failure:
4344         return -1;
4345 }
4346
4347
4348 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4349 {
4350         struct wpa_driver_nl80211_data *drv = priv;
4351         struct nl_msg *msg;
4352
4353         msg = nlmsg_alloc();
4354         if (!msg)
4355                 return -ENOMEM;
4356
4357         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4358                     NL80211_CMD_SET_BSS, 0);
4359
4360         if (cts >= 0)
4361                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4362         if (preamble >= 0)
4363                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4364         if (slot >= 0)
4365                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4366
4367         /* TODO: multi-BSS support */
4368         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4369
4370         return send_and_recv_msgs(drv, msg, NULL, NULL);
4371  nla_put_failure:
4372         return -ENOBUFS;
4373 }
4374
4375
4376 static int i802_set_cts_protect(void *priv, int value)
4377 {
4378         return i802_set_bss(priv, value, -1, -1);
4379 }
4380
4381
4382 static int i802_set_preamble(void *priv, int value)
4383 {
4384         return i802_set_bss(priv, -1, value, -1);
4385 }
4386
4387
4388 static int i802_set_short_slot_time(void *priv, int value)
4389 {
4390         return i802_set_bss(priv, -1, -1, value);
4391 }
4392
4393
4394 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4395                              const char *ifname, int vlan_id)
4396 {
4397         struct wpa_driver_nl80211_data *drv = priv;
4398         struct nl_msg *msg;
4399
4400         msg = nlmsg_alloc();
4401         if (!msg)
4402                 return -ENOMEM;
4403
4404         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4405                     0, NL80211_CMD_SET_STATION, 0);
4406
4407         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4408                     if_nametoindex(drv->ifname));
4409         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4410         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4411                     if_nametoindex(ifname));
4412
4413         return send_and_recv_msgs(drv, msg, NULL, NULL);
4414  nla_put_failure:
4415         return -ENOBUFS;
4416 }
4417
4418
4419 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4420 {
4421         struct wpa_driver_nl80211_data *drv = priv;
4422         char name[IFNAMSIZ + 1];
4423
4424         os_snprintf(name, sizeof(name), "%s.sta%d", drv->ifname, aid);
4425         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4426                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4427         if (val) {
4428                 if (nl80211_create_iface(priv, name, NL80211_IFTYPE_AP_VLAN,
4429                                          NULL, 1) < 0)
4430                         return -1;
4431                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4432                 return i802_set_sta_vlan(priv, addr, name, 0);
4433         } else {
4434                 i802_set_sta_vlan(priv, addr, drv->ifname, 0);
4435                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4436                                                     name);
4437         }
4438 }
4439
4440
4441 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4442 {
4443         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4444         struct sockaddr_ll lladdr;
4445         unsigned char buf[3000];
4446         int len;
4447         socklen_t fromlen = sizeof(lladdr);
4448
4449         len = recvfrom(sock, buf, sizeof(buf), 0,
4450                        (struct sockaddr *)&lladdr, &fromlen);
4451         if (len < 0) {
4452                 perror("recv");
4453                 return;
4454         }
4455
4456         if (have_ifidx(drv, lladdr.sll_ifindex))
4457                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4458 }
4459
4460
4461 static int i802_get_inact_sec(void *priv, const u8 *addr)
4462 {
4463         struct hostap_sta_driver_data data;
4464         int ret;
4465
4466         data.inactive_msec = (unsigned long) -1;
4467         ret = i802_read_sta_data(priv, &data, addr);
4468         if (ret || data.inactive_msec == (unsigned long) -1)
4469                 return -1;
4470         return data.inactive_msec / 1000;
4471 }
4472
4473
4474 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4475 {
4476 #if 0
4477         /* TODO */
4478 #endif
4479         return 0;
4480 }
4481
4482
4483 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4484                            int reason)
4485 {
4486         struct wpa_driver_nl80211_data *drv = priv;
4487         struct ieee80211_mgmt mgmt;
4488
4489         memset(&mgmt, 0, sizeof(mgmt));
4490         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4491                                           WLAN_FC_STYPE_DEAUTH);
4492         memcpy(mgmt.da, addr, ETH_ALEN);
4493         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4494         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4495         mgmt.u.deauth.reason_code = host_to_le16(reason);
4496         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4497                                             IEEE80211_HDRLEN +
4498                                             sizeof(mgmt.u.deauth));
4499 }
4500
4501
4502 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4503                              int reason)
4504 {
4505         struct wpa_driver_nl80211_data *drv = priv;
4506         struct ieee80211_mgmt mgmt;
4507
4508         memset(&mgmt, 0, sizeof(mgmt));
4509         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4510                                           WLAN_FC_STYPE_DISASSOC);
4511         memcpy(mgmt.da, addr, ETH_ALEN);
4512         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4513         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4514         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4515         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4516                                             IEEE80211_HDRLEN +
4517                                             sizeof(mgmt.u.disassoc));
4518 }
4519
4520
4521 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4522                              const char *brname, const char *ifname)
4523 {
4524         int ifindex;
4525         char in_br[IFNAMSIZ];
4526
4527         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4528         ifindex = if_nametoindex(brname);
4529         if (ifindex == 0) {
4530                 /*
4531                  * Bridge was configured, but the bridge device does
4532                  * not exist. Try to add it now.
4533                  */
4534                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4535                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4536                                    "bridge interface %s: %s",
4537                                    brname, strerror(errno));
4538                         return -1;
4539                 }
4540                 drv->added_bridge = 1;
4541                 add_ifidx(drv, if_nametoindex(brname));
4542         }
4543
4544         if (linux_br_get(in_br, ifname) == 0) {
4545                 if (os_strcmp(in_br, brname) == 0)
4546                         return 0; /* already in the bridge */
4547
4548                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4549                            "bridge %s", ifname, in_br);
4550                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4551                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4552                                    "remove interface %s from bridge "
4553                                    "%s: %s",
4554                                    ifname, brname, strerror(errno));
4555                         return -1;
4556                 }
4557         }
4558
4559         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4560                    ifname, brname);
4561         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4562                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4563                            "into bridge %s: %s",
4564                            ifname, brname, strerror(errno));
4565                 return -1;
4566         }
4567         drv->added_if_into_bridge = 1;
4568
4569         return 0;
4570 }
4571
4572
4573 static void *i802_init(struct hostapd_data *hapd,
4574                        struct wpa_init_params *params)
4575 {
4576         struct wpa_driver_nl80211_data *drv;
4577         size_t i;
4578         char brname[IFNAMSIZ];
4579         int ifindex, br_ifindex;
4580         int br_added = 0;
4581
4582         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4583         if (drv == NULL)
4584                 return NULL;
4585
4586         drv->bss.ifindex = drv->ifindex;
4587
4588         if (linux_br_get(brname, params->ifname) == 0) {
4589                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4590                            params->ifname, brname);
4591                 br_ifindex = if_nametoindex(brname);
4592         } else {
4593                 brname[0] = '\0';
4594                 br_ifindex = 0;
4595         }
4596
4597         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4598         drv->if_indices = drv->default_if_indices;
4599         for (i = 0; i < params->num_bridge; i++) {
4600                 if (params->bridge[i]) {
4601                         ifindex = if_nametoindex(params->bridge[i]);
4602                         if (ifindex)
4603                                 add_ifidx(drv, ifindex);
4604                         if (ifindex == br_ifindex)
4605                                 br_added = 1;
4606                 }
4607         }
4608         if (!br_added && br_ifindex &&
4609             (params->num_bridge == 0 || !params->bridge[0]))
4610                 add_ifidx(drv, br_ifindex);
4611
4612         /* start listening for EAPOL on the default AP interface */
4613         add_ifidx(drv, drv->ifindex);
4614
4615         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0))
4616                 goto failed;
4617
4618         if (params->bssid) {
4619                 if (linux_set_ifhwaddr(drv->ioctl_sock, drv->ifname,
4620                                        params->bssid))
4621                         goto failed;
4622         }
4623
4624         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4625                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4626                            "into AP mode", drv->ifname);
4627                 goto failed;
4628         }
4629
4630         if (params->num_bridge && params->bridge[0] &&
4631             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
4632                 goto failed;
4633
4634         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1))
4635                 goto failed;
4636
4637         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4638         if (drv->eapol_sock < 0) {
4639                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4640                 goto failed;
4641         }
4642
4643         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4644         {
4645                 printf("Could not register read socket for eapol\n");
4646                 goto failed;
4647         }
4648
4649         if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, params->own_addr))
4650                 goto failed;
4651
4652         return drv;
4653
4654 failed:
4655         nl80211_remove_monitor_interface(drv);
4656         if (drv->ioctl_sock >= 0)
4657                 close(drv->ioctl_sock);
4658
4659         genl_family_put(drv->nl80211);
4660         nl_cache_free(drv->nl_cache);
4661         nl_handle_destroy(drv->nl_handle);
4662         nl_cb_put(drv->nl_cb);
4663
4664         os_free(drv);
4665         return NULL;
4666 }
4667
4668
4669 static void i802_deinit(void *priv)
4670 {
4671         wpa_driver_nl80211_deinit(priv);
4672 }
4673
4674 #endif /* HOSTAPD */
4675
4676
4677 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4678         enum wpa_driver_if_type type)
4679 {
4680         switch (type) {
4681         case WPA_IF_STATION:
4682                 return NL80211_IFTYPE_STATION;
4683         case WPA_IF_AP_VLAN:
4684                 return NL80211_IFTYPE_AP_VLAN;
4685         case WPA_IF_AP_BSS:
4686                 return NL80211_IFTYPE_AP;
4687         }
4688         return -1;
4689 }
4690
4691
4692 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4693                                      enum wpa_driver_if_type type,
4694                                      const char *ifname, const u8 *addr,
4695                                      void *bss_ctx)
4696 {
4697         struct wpa_driver_nl80211_data *drv = priv;
4698         int ifidx;
4699 #ifdef HOSTAPD
4700         struct i802_bss *bss = NULL;
4701
4702         if (type == WPA_IF_AP_BSS) {
4703                 bss = os_zalloc(sizeof(*bss));
4704                 if (bss == NULL)
4705                         return -1;
4706         }
4707 #endif /* HOSTAPD */
4708
4709         ifidx = nl80211_create_iface(drv, ifname,
4710                                      wpa_driver_nl80211_if_type(type), addr,
4711                                      0);
4712         if (ifidx < 0) {
4713 #ifdef HOSTAPD
4714                 os_free(bss);
4715 #endif /* HOSTAPD */
4716                 return -1;
4717         }
4718
4719 #ifdef HOSTAPD
4720         if (type == WPA_IF_AP_BSS) {
4721                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
4722                         nl80211_remove_iface(drv, ifidx);
4723                         os_free(bss);
4724                         return -1;
4725                 }
4726                 bss->ifindex = ifidx;
4727                 bss->next = drv->bss.next;
4728                 drv->bss.next = bss;
4729         }
4730 #endif /* HOSTAPD */
4731
4732         return 0;
4733 }
4734
4735
4736 static int wpa_driver_nl80211_if_remove(void *priv,
4737                                         enum wpa_driver_if_type type,
4738                                         const char *ifname)
4739 {
4740         struct wpa_driver_nl80211_data *drv = priv;
4741         int ifindex = if_nametoindex(ifname);
4742
4743         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
4744                    __func__, type, ifname, ifindex);
4745         if (ifindex <= 0)
4746                 return -1;
4747         nl80211_remove_iface(drv, ifindex);
4748
4749 #ifdef HOSTAPD
4750         if (type == WPA_IF_AP_BSS) {
4751                 struct i802_bss *bss, *prev;
4752                 prev = &drv->bss;
4753                 bss = drv->bss.next;
4754                 while (bss) {
4755                         if (ifindex == bss->ifindex) {
4756                                 prev->next = bss->next;
4757                                 os_free(bss);
4758                                 break;
4759                         }
4760                         prev = bss;
4761                         bss = bss->next;
4762                 }
4763         }
4764 #endif /* HOSTAPD */
4765
4766         return 0;
4767 }
4768
4769
4770 static int cookie_handler(struct nl_msg *msg, void *arg)
4771 {
4772         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4773         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4774         u64 *cookie = arg;
4775         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4776                   genlmsg_attrlen(gnlh, 0), NULL);
4777         if (tb[NL80211_ATTR_COOKIE])
4778                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
4779         return NL_SKIP;
4780 }
4781
4782
4783 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
4784                                           const u8 *dst, const u8 *src,
4785                                           const u8 *bssid,
4786                                           const u8 *data, size_t data_len)
4787 {
4788         struct wpa_driver_nl80211_data *drv = priv;
4789         int ret = -1;
4790         struct nl_msg *msg;
4791         u8 *buf;
4792         struct ieee80211_hdr *hdr;
4793         u64 cookie;
4794
4795         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
4796                    drv->ifindex);
4797
4798         buf = os_zalloc(24 + data_len);
4799         if (buf == NULL)
4800                 return ret;
4801         os_memcpy(buf + 24, data, data_len);
4802         hdr = (struct ieee80211_hdr *) buf;
4803         hdr->frame_control =
4804                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
4805         os_memcpy(hdr->addr1, dst, ETH_ALEN);
4806         os_memcpy(hdr->addr2, src, ETH_ALEN);
4807         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
4808
4809         if (drv->nlmode == NL80211_IFTYPE_AP) {
4810                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
4811                 os_free(buf);
4812                 return ret;
4813         }
4814
4815         msg = nlmsg_alloc();
4816         if (!msg)
4817                 return -1;
4818
4819         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4820                     NL80211_CMD_ACTION, 0);
4821
4822         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4823         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4824         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
4825         os_free(buf);
4826
4827         cookie = 0;
4828         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4829         msg = NULL;
4830         if (ret) {
4831                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
4832                            "(%s)", ret, strerror(-ret));
4833                 goto nla_put_failure;
4834         }
4835         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
4836                    "cookie 0x%llx", (long long unsigned int) cookie);
4837         drv->send_action_cookie = cookie;
4838         drv->pending_send_action = 1;
4839         ret = 0;
4840
4841 nla_put_failure:
4842         nlmsg_free(msg);
4843         return ret;
4844 }
4845
4846
4847 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
4848                                                 unsigned int duration)
4849 {
4850         struct wpa_driver_nl80211_data *drv = priv;
4851         struct nl_msg *msg;
4852         int ret;
4853         u64 cookie;
4854
4855         msg = nlmsg_alloc();
4856         if (!msg)
4857                 return -1;
4858
4859         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4860                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
4861
4862         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4863         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4864         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
4865
4866         cookie = 0;
4867         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4868         if (ret == 0) {
4869                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
4870                            "0x%llx for freq=%u MHz duration=%u",
4871                            (long long unsigned int) cookie, freq, duration);
4872                 drv->remain_on_chan_cookie = cookie;
4873                 return 0;
4874         }
4875         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
4876                    "(freq=%d): %d (%s)", freq, ret, strerror(-ret));
4877 nla_put_failure:
4878         return -1;
4879 }
4880
4881
4882 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
4883 {
4884         struct wpa_driver_nl80211_data *drv = priv;
4885         struct nl_msg *msg;
4886         int ret;
4887
4888         if (!drv->pending_remain_on_chan) {
4889                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
4890                            "to cancel");
4891                 return -1;
4892         }
4893
4894         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
4895                    "0x%llx",
4896                    (long long unsigned int) drv->remain_on_chan_cookie);
4897
4898         msg = nlmsg_alloc();
4899         if (!msg)
4900                 return -1;
4901
4902         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4903                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
4904
4905         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4906         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
4907
4908         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4909         if (ret == 0)
4910                 return 0;
4911         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
4912                    "%d (%s)", ret, strerror(-ret));
4913 nla_put_failure:
4914         return -1;
4915 }
4916
4917
4918 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
4919                                                         void *timeout_ctx)
4920 {
4921         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4922         if (drv->monitor_ifidx < 0)
4923                 return; /* monitor interface already removed */
4924
4925         if (drv->nlmode != NL80211_IFTYPE_STATION)
4926                 return; /* not in station mode anymore */
4927
4928         if (drv->probe_req_report)
4929                 return; /* reporting enabled */
4930
4931         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
4932                    "Probe Request reporting needed anymore");
4933         nl80211_remove_monitor_interface(drv);
4934 }
4935
4936
4937 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
4938 {
4939         struct wpa_driver_nl80211_data *drv = priv;
4940
4941         if (drv->nlmode != NL80211_IFTYPE_STATION) {
4942                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
4943                            "allowed in station mode (iftype=%d)",
4944                            drv->nlmode);
4945                 return -1;
4946         }
4947         drv->probe_req_report = report;
4948
4949         if (report) {
4950                 eloop_cancel_timeout(
4951                         wpa_driver_nl80211_probe_req_report_timeout,
4952                         drv, NULL);
4953                 if (drv->monitor_ifidx < 0 &&
4954                     nl80211_create_monitor_interface(drv))
4955                         return -1;
4956         } else {
4957                 /*
4958                  * It takes a while to remove the monitor interface, so try to
4959                  * avoid doing this if it is needed again shortly. Instead,
4960                  * schedule the interface to be removed later if no need for it
4961                  * is seen.
4962                  */
4963                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
4964                            "to be removed after 10 seconds of no use");
4965                 eloop_register_timeout(
4966                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
4967                         drv, NULL);
4968         }
4969
4970         return 0;
4971 }
4972
4973
4974 static int wpa_driver_nl80211_alloc_interface_addr(void *priv, u8 *addr,
4975                                                    char *ifname)
4976 {
4977         struct wpa_driver_nl80211_data *drv = priv;
4978
4979         if (ifname)
4980                 ifname[0] = '\0';
4981
4982         if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, addr) < 0)
4983                 return -1;
4984
4985         if (addr[0] & 0x02) {
4986                 /* TODO: add support for generating multiple addresses */
4987                 addr[0] ^= 0x80;
4988         } else
4989                 addr[0] = 0x02; /* locally administered */
4990
4991         return 0;
4992 }
4993
4994
4995 static void wpa_driver_nl80211_release_interface_addr(void *priv,
4996                                                       const u8 *addr)
4997 {
4998         /* TODO: keep list of allocated address and release them here */
4999 }
5000
5001
5002 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5003                                      int ifindex, int disabled)
5004 {
5005         struct nl_msg *msg;
5006         struct nlattr *bands, *band;
5007         int ret;
5008
5009         msg = nlmsg_alloc();
5010         if (!msg)
5011                 return -1;
5012
5013         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5014                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5015         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5016
5017         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5018         if (!bands)
5019                 goto nla_put_failure;
5020
5021         /*
5022          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5023          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5024          * rates. All 5 GHz rates are left enabled.
5025          */
5026         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5027         if (!band)
5028                 goto nla_put_failure;
5029         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5030                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5031         nla_nest_end(msg, band);
5032
5033         nla_nest_end(msg, bands);
5034
5035         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5036         msg = NULL;
5037         if (ret) {
5038                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5039                            "(%s)", ret, strerror(-ret));
5040         }
5041
5042         return ret;
5043
5044 nla_put_failure:
5045         nlmsg_free(msg);
5046         return -1;
5047 }
5048
5049
5050 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5051 {
5052         struct wpa_driver_nl80211_data *drv = priv;
5053         drv->disable_11b_rates = disabled;
5054         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5055 }
5056
5057
5058 static int wpa_driver_nl80211_deinit_ap(void *priv)
5059 {
5060         struct wpa_driver_nl80211_data *drv = priv;
5061         if (drv->nlmode != NL80211_IFTYPE_AP)
5062                 return -1;
5063         wpa_driver_nl80211_del_beacon(drv);
5064         return wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
5065 }
5066
5067
5068 static void wpa_driver_nl80211_resume(void *priv)
5069 {
5070         struct wpa_driver_nl80211_data *drv = priv;
5071         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
5072                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5073                            "resume event");
5074         }
5075 }
5076
5077
5078 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5079         .name = "nl80211",
5080         .desc = "Linux nl80211/cfg80211",
5081         .get_bssid = wpa_driver_nl80211_get_bssid,
5082         .get_ssid = wpa_driver_nl80211_get_ssid,
5083         .set_key = wpa_driver_nl80211_set_key,
5084         .scan2 = wpa_driver_nl80211_scan,
5085         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5086         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5087         .disassociate = wpa_driver_nl80211_disassociate,
5088         .authenticate = wpa_driver_nl80211_authenticate,
5089         .associate = wpa_driver_nl80211_associate,
5090         .init = wpa_driver_nl80211_init,
5091         .deinit = wpa_driver_nl80211_deinit,
5092         .get_capa = wpa_driver_nl80211_get_capa,
5093         .set_operstate = wpa_driver_nl80211_set_operstate,
5094         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5095         .set_country = wpa_driver_nl80211_set_country,
5096         .set_beacon = wpa_driver_nl80211_set_beacon,
5097         .if_add = wpa_driver_nl80211_if_add,
5098         .if_remove = wpa_driver_nl80211_if_remove,
5099         .send_mlme = wpa_driver_nl80211_send_mlme,
5100         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5101         .sta_add = wpa_driver_nl80211_sta_add,
5102         .sta_remove = wpa_driver_nl80211_sta_remove,
5103         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5104         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5105 #ifdef HOSTAPD
5106         .hapd_init = i802_init,
5107         .hapd_deinit = i802_deinit,
5108         .get_seqnum = i802_get_seqnum,
5109         .flush = i802_flush,
5110         .read_sta_data = i802_read_sta_data,
5111         .sta_deauth = i802_sta_deauth,
5112         .sta_disassoc = i802_sta_disassoc,
5113         .get_inact_sec = i802_get_inact_sec,
5114         .sta_clear_stats = i802_sta_clear_stats,
5115         .set_freq = i802_set_freq,
5116         .set_rts = i802_set_rts,
5117         .set_frag = i802_set_frag,
5118         .set_rate_sets = i802_set_rate_sets,
5119         .set_cts_protect = i802_set_cts_protect,
5120         .set_preamble = i802_set_preamble,
5121         .set_short_slot_time = i802_set_short_slot_time,
5122         .set_tx_queue_params = i802_set_tx_queue_params,
5123         .set_sta_vlan = i802_set_sta_vlan,
5124         .set_wds_sta = i802_set_wds_sta,
5125 #endif /* HOSTAPD */
5126         .send_action = wpa_driver_nl80211_send_action,
5127         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5128         .cancel_remain_on_channel =
5129         wpa_driver_nl80211_cancel_remain_on_channel,
5130         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5131         .alloc_interface_addr = wpa_driver_nl80211_alloc_interface_addr,
5132         .release_interface_addr = wpa_driver_nl80211_release_interface_addr,
5133         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5134         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5135         .resume = wpa_driver_nl80211_resume,
5136 };